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| author |  David S. Miller <davem@davemloft.net>
| 2022-12-05 10:58:17 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net>
| 2022-12-05 10:58:17 +0000 |
| commit | 27e521c59e49603001cbee900f086ccf4a0e70b2 (patch) | |
| tree | 6dcff7d34a7197198cee1f5793b6cb161e551fcf | |
| parent | net: stmmac: tegra: Add MGBE support (diff) | |
| parent | rxrpc: Transmit ACKs at the point of generation (diff) | |
| download | linux-27e521c59e49603001cbee900f086ccf4a0e70b2.tar.gz linux-27e521c59e49603001cbee900f086ccf4a0e70b2.tar.bz2 linux-27e521c59e49603001cbee900f086ccf4a0e70b2.zip | |
Merge tag 'rxrpc-next-20221201-b' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
David Howells says:
====================
rxrpc: Increasing SACK size and moving away from softirq, parts 2 & 3
Here are the second and third parts of patches in the process of moving
rxrpc from doing a lot of its stuff in softirq context to doing it in an
I/O thread in process context and thereby making it easier to support a
larger SACK table.
The full description is in the description for the first part[1] which is
already in net-next.
The second part includes some cleanups, adds some testing and overhauls
some tracing:
(1) Remove declaration of rxrpc_kernel_call_is_complete() as the
definition is no longer present.
(2) Remove the knet() and kproto() macros in favour of using tracepoints.
(3) Remove handling of duplicate packets from recvmsg. The input side
isn't now going to insert overlapping/duplicate packets into the
recvmsg queue.
(4) Don't use the rxrpc_conn_parameters struct in the rxrpc_connection or
rxrpc_bundle structs - rather put the members in directly.
(5) Extract the abort code from a received abort packet right up front
rather than doing it in multiple places later.
(6) Use enums and symbol lists rather than __builtin_return_address() to
indicate where a tracepoint was triggered for local, peer, conn, call
and skbuff tracing.
(7) Add a refcount tracepoint for the rxrpc_bundle struct.
(8) Implement an in-kernel server for the AFS rxperf testing program to
talk to (enabled by a Kconfig option).
This is tagged as rxrpc-next-20221201-a.
The third part introduces the I/O thread and switches various bits over to
running there:
(1) Fix call timers and call and connection workqueues to not hold refs on
the rxrpc_call and rxrpc_connection structs to thereby avoid messy
cleanup when the last ref is put in softirq mode.
(2) Split input.c so that the call packet processing bits are separate
from the received packet distribution bits. Call packet processing
gets bumped over to the call event handler.
(3) Create a per-local endpoint I/O thread. Barring some tiny bits that
still get done in softirq context, all packet reception, processing
and transmission is done in this thread. That will allow a load of
locking to be removed.
(4) Perform packet processing and error processing from the I/O thread.
(5) Provide a mechanism to process call event notifications in the I/O
thread rather than queuing a work item for that call.
(6) Move data and ACK transmission into the I/O thread. ACKs can then be
transmitted at the point they're generated rather than getting
delegated from softirq context to some process context somewhere.
(7) Move call and local processor event handling into the I/O thread.
(8) Move cwnd degradation to after packets have been transmitted so that
they don't shorten the window too quickly.
A bunch of simplifications can then be done:
(1) The input_lock is no longer necessary as exclusion is achieved by
running the code in the I/O thread only.
(2) Don't need to use sk->sk_receive_queue.lock to guard socket state
changes as the socket mutex should suffice.
(3) Don't take spinlocks in RCU callback functions as they get run in
softirq context and thus need _bh annotations.
(4) RCU is then no longer needed for the peer's error_targets list.
(5) Simplify the skbuff handling in the receive path by dropping the ref
in the basic I/O thread loop and getting an extra ref as and when we
need to queue the packet for recvmsg or another context.
(6) Get the peer address earlier in the input process and pass it to the
users so that we only do it once.
This is tagged as rxrpc-next-20221201-b.
Changes:
========
ver #2)
- Added a patch to change four assertions into warnings in rxrpc_read()
and fixed a checker warning from a __user annotation that should have
been removed..
- Change a min() to min_t() in rxperf as PAGE_SIZE doesn't seem to match
type size_t on i386.
- Three error handling issues in rxrpc_new_incoming_call():
- If not DATA or not seq #1, should drop the packet, not abort.
- Fix a goto that went to the wrong place, dropping a non-held lock.
- Fix an rcu_read_lock that should've been an unlock.
Tested-by: Marc Dionne <marc.dionne@auristor.com>
Tested-by: kafs-testing+fedora36_64checkkafs-build-144@auristor.com
Link: https://lore.kernel.org/r/166794587113.2389296.16484814996876530222.stgit@warthog.procyon.org.uk/ [1]
Link: https://lore.kernel.org/r/166982725699.621383.2358362793992993374.stgit@warthog.procyon.org.uk/ # v1
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
31 files changed, 2882 insertions, 2102 deletions
diff --git a/include/net/af_rxrpc.h b/include/net/af_rxrpc.h index b69ca695935c..d5a5ae926380 100644 --- a/include/net/af_rxrpc.h +++ b/include/net/af_rxrpc.h @@ -66,10 +66,10 @@ int rxrpc_kernel_charge_accept(struct socket *, rxrpc_notify_rx_t, void rxrpc_kernel_set_tx_length(struct socket *, struct rxrpc_call *, s64); bool rxrpc_kernel_check_life(const struct socket *, const struct rxrpc_call *); u32 rxrpc_kernel_get_epoch(struct socket *, struct rxrpc_call *); -bool rxrpc_kernel_call_is_complete(struct rxrpc_call *); void rxrpc_kernel_set_max_life(struct socket *, struct rxrpc_call *, unsigned long); int rxrpc_sock_set_min_security_level(struct sock *sk, unsigned int val); +int rxrpc_sock_set_security_keyring(struct sock *, struct key *); #endif /* _NET_RXRPC_H */ diff --git a/include/trace/events/rxrpc.h b/include/trace/events/rxrpc.h index b9886d1df825..049b52e7aa6a 100644 --- a/include/trace/events/rxrpc.h +++ b/include/trace/events/rxrpc.h @@ -16,44 +16,121 @@ /* * Declare tracing information enums and their string mappings for display. */ +#define rxrpc_call_poke_traces \ + EM(rxrpc_call_poke_error, "Error") \ + EM(rxrpc_call_poke_idle, "Idle") \ + EM(rxrpc_call_poke_start, "Start") \ + EM(rxrpc_call_poke_timer, "Timer") \ + E_(rxrpc_call_poke_timer_now, "Timer-now") + #define rxrpc_skb_traces \ - EM(rxrpc_skb_ack, "ACK") \ - EM(rxrpc_skb_cleaned, "CLN") \ - EM(rxrpc_skb_cloned_jumbo, "CLJ") \ - EM(rxrpc_skb_freed, "FRE") \ - EM(rxrpc_skb_got, "GOT") \ - EM(rxrpc_skb_lost, "*L*") \ - EM(rxrpc_skb_new, "NEW") \ - EM(rxrpc_skb_purged, "PUR") \ - EM(rxrpc_skb_received, "RCV") \ - EM(rxrpc_skb_rotated, "ROT") \ - EM(rxrpc_skb_seen, "SEE") \ - EM(rxrpc_skb_unshared, "UNS") \ - E_(rxrpc_skb_unshared_nomem, "US0") + EM(rxrpc_skb_eaten_by_unshare, "ETN unshare ") \ + EM(rxrpc_skb_eaten_by_unshare_nomem, "ETN unshar-nm") \ + EM(rxrpc_skb_get_conn_work, "GET conn-work") \ + EM(rxrpc_skb_get_local_work, "GET locl-work") \ + EM(rxrpc_skb_get_reject_work, "GET rej-work ") \ + EM(rxrpc_skb_get_to_recvmsg, "GET to-recv ") \ + EM(rxrpc_skb_get_to_recvmsg_oos, "GET to-recv-o") \ + EM(rxrpc_skb_new_encap_rcv, "NEW encap-rcv") \ + EM(rxrpc_skb_new_error_report, "NEW error-rpt") \ + EM(rxrpc_skb_new_jumbo_subpacket, "NEW jumbo-sub") \ + EM(rxrpc_skb_new_unshared, "NEW unshared ") \ + EM(rxrpc_skb_put_conn_work, "PUT conn-work") \ + EM(rxrpc_skb_put_error_report, "PUT error-rep") \ + EM(rxrpc_skb_put_input, "PUT input ") \ + EM(rxrpc_skb_put_jumbo_subpacket, "PUT jumbo-sub") \ + EM(rxrpc_skb_put_purge, "PUT purge ") \ + EM(rxrpc_skb_put_rotate, "PUT rotate ") \ + EM(rxrpc_skb_put_unknown, "PUT unknown ") \ + EM(rxrpc_skb_see_conn_work, "SEE conn-work") \ + EM(rxrpc_skb_see_recvmsg, "SEE recvmsg ") \ + EM(rxrpc_skb_see_reject, "SEE reject ") \ + EM(rxrpc_skb_see_rotate, "SEE rotate ") \ + E_(rxrpc_skb_see_version, "SEE version ") #define rxrpc_local_traces \ - EM(rxrpc_local_got, "GOT") \ - EM(rxrpc_local_new, "NEW") \ - EM(rxrpc_local_processing, "PRO") \ - EM(rxrpc_local_put, "PUT") \ - EM(rxrpc_local_queued, "QUE") \ - E_(rxrpc_local_tx_ack, "TAK") + EM(rxrpc_local_free, "FREE ") \ + EM(rxrpc_local_get_call, "GET call ") \ + EM(rxrpc_local_get_client_conn, "GET conn-cln") \ + EM(rxrpc_local_get_for_use, "GET for-use ") \ + EM(rxrpc_local_get_peer, "GET peer ") \ + EM(rxrpc_local_get_prealloc_conn, "GET conn-pre") \ + EM(rxrpc_local_new, "NEW ") \ + EM(rxrpc_local_put_bind, "PUT bind ") \ + EM(rxrpc_local_put_call, "PUT call ") \ + EM(rxrpc_local_put_for_use, "PUT for-use ") \ + EM(rxrpc_local_put_kill_conn, "PUT conn-kil") \ + EM(rxrpc_local_put_peer, "PUT peer ") \ + EM(rxrpc_local_put_prealloc_conn, "PUT conn-pre") \ + EM(rxrpc_local_put_release_sock, "PUT rel-sock") \ + EM(rxrpc_local_stop, "STOP ") \ + EM(rxrpc_local_stopped, "STOPPED ") \ + EM(rxrpc_local_unuse_bind, "UNU bind ") \ + EM(rxrpc_local_unuse_conn_work, "UNU conn-wrk") \ + EM(rxrpc_local_unuse_peer_keepalive, "UNU peer-kpa") \ + EM(rxrpc_local_unuse_release_sock, "UNU rel-sock") \ + EM(rxrpc_local_use_conn_work, "USE conn-wrk") \ + EM(rxrpc_local_use_lookup, "USE lookup ") \ + E_(rxrpc_local_use_peer_keepalive, "USE peer-kpa") #define rxrpc_peer_traces \ - EM(rxrpc_peer_got, "GOT") \ - EM(rxrpc_peer_new, "NEW") \ - EM(rxrpc_peer_processing, "PRO") \ - E_(rxrpc_peer_put, "PUT") + EM(rxrpc_peer_free, "FREE ") \ + EM(rxrpc_peer_get_accept, "GET accept ") \ + EM(rxrpc_peer_get_activate_call, "GET act-call") \ + EM(rxrpc_peer_get_bundle, "GET bundle ") \ + EM(rxrpc_peer_get_client_conn, "GET cln-conn") \ + EM(rxrpc_peer_get_input, "GET input ") \ + EM(rxrpc_peer_get_input_error, "GET inpt-err") \ + EM(rxrpc_peer_get_keepalive, "GET keepaliv") \ + EM(rxrpc_peer_get_lookup_client, "GET look-cln") \ + EM(rxrpc_peer_get_service_conn, "GET srv-conn") \ + EM(rxrpc_peer_new_client, "NEW client ") \ + EM(rxrpc_peer_new_prealloc, "NEW prealloc") \ + EM(rxrpc_peer_put_bundle, "PUT bundle ") \ + EM(rxrpc_peer_put_call, "PUT call ") \ + EM(rxrpc_peer_put_conn, "PUT conn ") \ + EM(rxrpc_peer_put_discard_tmp, "PUT disc-tmp") \ + EM(rxrpc_peer_put_input, "PUT input ") \ + EM(rxrpc_peer_put_input_error, "PUT inpt-err") \ + E_(rxrpc_peer_put_keepalive, "PUT keepaliv") + +#define rxrpc_bundle_traces \ + EM(rxrpc_bundle_free, "FREE ") \ + EM(rxrpc_bundle_get_client_call, "GET clt-call") \ + EM(rxrpc_bundle_get_client_conn, "GET clt-conn") \ + EM(rxrpc_bundle_get_service_conn, "GET svc-conn") \ + EM(rxrpc_bundle_put_conn, "PUT conn ") \ + EM(rxrpc_bundle_put_discard, "PUT discard ") \ + E_(rxrpc_bundle_new, "NEW ") #define rxrpc_conn_traces \ - EM(rxrpc_conn_got, "GOT") \ - EM(rxrpc_conn_new_client, "NWc") \ - EM(rxrpc_conn_new_service, "NWs") \ - EM(rxrpc_conn_put_client, "PTc") \ - EM(rxrpc_conn_put_service, "PTs") \ - EM(rxrpc_conn_queued, "QUE") \ - EM(rxrpc_conn_reap_service, "RPs") \ - E_(rxrpc_conn_seen, "SEE") + EM(rxrpc_conn_free, "FREE ") \ + EM(rxrpc_conn_get_activate_call, "GET act-call") \ + EM(rxrpc_conn_get_call_input, "GET inp-call") \ + EM(rxrpc_conn_get_conn_input, "GET inp-conn") \ + EM(rxrpc_conn_get_idle, "GET idle ") \ + EM(rxrpc_conn_get_poke, "GET poke ") \ + EM(rxrpc_conn_get_service_conn, "GET svc-conn") \ + EM(rxrpc_conn_new_client, "NEW client ") \ + EM(rxrpc_conn_new_service, "NEW service ") \ + EM(rxrpc_conn_put_call, "PUT call ") \ + EM(rxrpc_conn_put_call_input, "PUT inp-call") \ + EM(rxrpc_conn_put_conn_input, "PUT inp-conn") \ + EM(rxrpc_conn_put_discard, "PUT discard ") \ + EM(rxrpc_conn_put_discard_idle, "PUT disc-idl") \ + EM(rxrpc_conn_put_local_dead, "PUT loc-dead") \ + EM(rxrpc_conn_put_noreuse, "PUT noreuse ") \ + EM(rxrpc_conn_put_poke, "PUT poke ") \ + EM(rxrpc_conn_put_service_reaped, "PUT svc-reap") \ + EM(rxrpc_conn_put_unbundle, "PUT unbundle") \ + EM(rxrpc_conn_put_unidle, "PUT unidle ") \ + EM(rxrpc_conn_queue_challenge, "QUE chall ") \ + EM(rxrpc_conn_queue_retry_work, "QUE retry-wk") \ + EM(rxrpc_conn_queue_rx_work, "QUE rx-work ") \ + EM(rxrpc_conn_queue_timer, "QUE timer ") \ + EM(rxrpc_conn_see_new_service_conn, "SEE new-svc ") \ + EM(rxrpc_conn_see_reap_service, "SEE reap-svc") \ + E_(rxrpc_conn_see_work, "SEE work ") #define rxrpc_client_traces \ EM(rxrpc_client_activate_chans, "Activa") \ @@ -71,26 +148,36 @@ E_(rxrpc_client_to_idle, "->Idle") #define rxrpc_call_traces \ - EM(rxrpc_call_connected, "CON") \ - EM(rxrpc_call_error, "*E*") \ - EM(rxrpc_call_got, "GOT") \ - EM(rxrpc_call_got_kernel, "Gke") \ - EM(rxrpc_call_got_timer, "GTM") \ - EM(rxrpc_call_got_tx, "Gtx") \ - EM(rxrpc_call_got_userid, "Gus") \ - EM(rxrpc_call_new_client, "NWc") \ - EM(rxrpc_call_new_service, "NWs") \ - EM(rxrpc_call_put, "PUT") \ - EM(rxrpc_call_put_kernel, "Pke") \ - EM(rxrpc_call_put_noqueue, "PnQ") \ - EM(rxrpc_call_put_notimer, "PnT") \ - EM(rxrpc_call_put_timer, "PTM") \ - EM(rxrpc_call_put_tx, "Ptx") \ - EM(rxrpc_call_put_userid, "Pus") \ - EM(rxrpc_call_queued, "QUE") \ - EM(rxrpc_call_queued_ref, "QUR") \ - EM(rxrpc_call_release, "RLS") \ - E_(rxrpc_call_seen, "SEE") + EM(rxrpc_call_get_input, "GET input ") \ + EM(rxrpc_call_get_kernel_service, "GET krnl-srv") \ + EM(rxrpc_call_get_notify_socket, "GET notify ") \ + EM(rxrpc_call_get_poke, "GET poke ") \ + EM(rxrpc_call_get_recvmsg, "GET recvmsg ") \ + EM(rxrpc_call_get_release_sock, "GET rel-sock") \ + EM(rxrpc_call_get_sendmsg, "GET sendmsg ") \ + EM(rxrpc_call_get_userid, "GET user-id ") \ + EM(rxrpc_call_new_client, "NEW client ") \ + EM(rxrpc_call_new_prealloc_service, "NEW prealloc") \ + EM(rxrpc_call_put_discard_prealloc, "PUT disc-pre") \ + EM(rxrpc_call_put_discard_error, "PUT disc-err") \ + EM(rxrpc_call_put_input, "PUT input ") \ + EM(rxrpc_call_put_kernel, "PUT kernel ") \ + EM(rxrpc_call_put_poke, "PUT poke ") \ + EM(rxrpc_call_put_recvmsg, "PUT recvmsg ") \ + EM(rxrpc_call_put_release_sock, "PUT rls-sock") \ + EM(rxrpc_call_put_release_sock_tba, "PUT rls-sk-a") \ + EM(rxrpc_call_put_sendmsg, "PUT sendmsg ") \ + EM(rxrpc_call_put_unnotify, "PUT unnotify") \ + EM(rxrpc_call_put_userid_exists, "PUT u-exists") \ + EM(rxrpc_call_see_accept, "SEE accept ") \ + EM(rxrpc_call_see_activate_client, "SEE act-clnt") \ + EM(rxrpc_call_see_connect_failed, "SEE con-fail") \ + EM(rxrpc_call_see_connected, "SEE connect ") \ + EM(rxrpc_call_see_distribute_error, "SEE dist-err") \ + EM(rxrpc_call_see_input, "SEE input ") \ + EM(rxrpc_call_see_release, "SEE release ") \ + EM(rxrpc_call_see_userid_exists, "SEE u-exists") \ + E_(rxrpc_call_see_zap, "SEE zap ") #define rxrpc_txqueue_traces \ EM(rxrpc_txqueue_await_reply, "AWR") \ @@ -179,6 +266,7 @@ EM(rxrpc_propose_ack_respond_to_ping, "Rsp2Png") \ EM(rxrpc_propose_ack_retry_tx, "RetryTx") \ EM(rxrpc_propose_ack_rotate_rx, "RxAck ") \ + EM(rxrpc_propose_ack_rx_idle, "RxIdle ") \ E_(rxrpc_propose_ack_terminal_ack, "ClTerm ") #define rxrpc_congest_modes \ @@ -273,6 +361,7 @@ EM(rxrpc_txbuf_put_rotated, "PUT ROTATED") \ EM(rxrpc_txbuf_put_send_aborted, "PUT SEND-X ") \ EM(rxrpc_txbuf_put_trans, "PUT TRANS ") \ + EM(rxrpc_txbuf_see_out_of_step, "OUT-OF-STEP") \ EM(rxrpc_txbuf_see_send_more, "SEE SEND+ ") \ E_(rxrpc_txbuf_see_unacked, "SEE UNACKED") @@ -287,6 +376,8 @@ #define EM(a, b) a, #define E_(a, b) a +enum rxrpc_bundle_trace { rxrpc_bundle_traces } __mode(byte); +enum rxrpc_call_poke_trace { rxrpc_call_poke_traces } __mode(byte); enum rxrpc_call_trace { rxrpc_call_traces } __mode(byte); enum rxrpc_client_trace { rxrpc_client_traces } __mode(byte); enum rxrpc_congest_change { rxrpc_congest_changes } __mode(byte); @@ -316,6 +407,8 @@ enum rxrpc_txqueue_trace { rxrpc_txqueue_traces } __mode(byte); #define EM(a, b) TRACE_DEFINE_ENUM(a); #define E_(a, b) TRACE_DEFINE_ENUM(a); +rxrpc_bundle_traces; +rxrpc_call_poke_traces; rxrpc_call_traces; rxrpc_client_traces; rxrpc_congest_changes; @@ -345,83 +438,98 @@ rxrpc_txqueue_traces; TRACE_EVENT(rxrpc_local, TP_PROTO(unsigned int local_debug_id, enum rxrpc_local_trace op, - int usage, const void *where), + int ref, int usage), - TP_ARGS(local_debug_id, op, usage, where), + TP_ARGS(local_debug_id, op, ref, usage), TP_STRUCT__entry( __field(unsigned int, local ) __field(int, op ) + __field(int, ref ) __field(int, usage ) - __field(const void *, where ) ), TP_fast_assign( __entry->local = local_debug_id; __entry->op = op; + __entry->ref = ref; __entry->usage = usage; - __entry->where = where; ), - TP_printk("L=%08x %s u=%d sp=%pSR", + TP_printk("L=%08x %s r=%d u=%d", __entry->local, __print_symbolic(__entry->op, rxrpc_local_traces), - __entry->usage, - __entry->where) + __entry->ref, + __entry->usage) ); TRACE_EVENT(rxrpc_peer, - TP_PROTO(unsigned int peer_debug_id, enum rxrpc_peer_trace op, - int usage, const void *where), + TP_PROTO(unsigned int peer_debug_id, int ref, enum rxrpc_peer_trace why), - TP_ARGS(peer_debug_id, op, usage, where), + TP_ARGS(peer_debug_id, ref, why), TP_STRUCT__entry( __field(unsigned int, peer ) - __field(int, op ) - __field(int, usage ) - __field(const void *, where ) + __field(int, ref ) + __field(int, why ) ), TP_fast_assign( __entry->peer = peer_debug_id; - __entry->op = op; - __entry->usage = usage; - __entry->where = where; + __entry->ref = ref; + __entry->why = why; ), - TP_printk("P=%08x %s u=%d sp=%pSR", + TP_printk("P=%08x %s r=%d", __entry->peer, - __print_symbolic(__entry->op, rxrpc_peer_traces), - __entry->usage, - __entry->where) + __print_symbolic(__entry->why, rxrpc_peer_traces), + __entry->ref) + ); + +TRACE_EVENT(rxrpc_bundle, + TP_PROTO(unsigned int bundle_debug_id, int ref, enum rxrpc_bundle_trace why), + + TP_ARGS(bundle_debug_id, ref, why), + + TP_STRUCT__entry( + __field(unsigned int, bundle ) + __field(int, ref ) + __field(int, why ) + ), + + TP_fast_assign( + __entry->bundle = bundle_debug_id; + __entry->ref = ref; + __entry->why = why; + ), + + TP_printk("CB=%08x %s r=%d", + __entry->bundle, + __print_symbolic(__entry->why, rxrpc_bundle_traces), + __entry->ref) ); TRACE_EVENT(rxrpc_conn, - TP_PROTO(unsigned int conn_debug_id, enum rxrpc_conn_trace op, - int usage, const void *where), + TP_PROTO(unsigned int conn_debug_id, int ref, enum rxrpc_conn_trace why), - TP_ARGS(conn_debug_id, op, usage, where), + TP_ARGS(conn_debug_id, ref, why), TP_STRUCT__entry( __field(unsigned int, conn ) - __field(int, op ) - __field(int, usage ) - __field(const void *, where ) + __field(int, ref ) + __field(int, why ) ), TP_fast_assign( __entry->conn = conn_debug_id; - __entry->op = op; - __entry->usage = usage; - __entry->where = where; + __entry->ref = ref; + __entry->why = why; ), - TP_printk("C=%08x %s u=%d sp=%pSR", + TP_printk("C=%08x %s r=%d", __entry->conn, - __print_symbolic(__entry->op, rxrpc_conn_traces), - __entry->usage, - __entry->where) + __print_symbolic(__entry->why, rxrpc_conn_traces), + __entry->ref) ); TRACE_EVENT(rxrpc_client, @@ -455,63 +563,57 @@ TRACE_EVENT(rxrpc_client, ); TRACE_EVENT(rxrpc_call, - TP_PROTO(unsigned int call_debug_id, enum rxrpc_call_trace op, - int usage, const void *where, const void *aux), + TP_PROTO(unsigned int call_debug_id, int ref, unsigned long aux, + enum rxrpc_call_trace why), - TP_ARGS(call_debug_id, op, usage, where, aux), + TP_ARGS(call_debug_id, ref, aux, why), TP_STRUCT__entry( __field(unsigned int, call ) - __field(int, op ) - __field(int, usage ) - __field(const void *, where ) - __field(const void *, aux ) + __field(int, ref ) + __field(int, why ) + __field(unsigned long, aux ) ), TP_fast_assign( __entry->call = call_debug_id; - __entry->op = op; - __entry->usage = usage; - __entry->where = where; + __entry->ref = ref; + __entry->why = why; __entry->aux = aux; ), - TP_printk("c=%08x %s u=%d sp=%pSR a=%p", + TP_printk("c=%08x %s r=%d a=%lx", __entry->call, - __print_symbolic(__entry->op, rxrpc_call_traces), - __entry->usage, - __entry->where, + __print_symbolic(__entry->why, rxrpc_call_traces), + __entry->ref, __entry->aux) ); TRACE_EVENT(rxrpc_skb, - TP_PROTO(struct sk_buff *skb, enum rxrpc_skb_trace op, - int usage, int mod_count, const void *where), + TP_PROTO(struct sk_buff *skb, int usage, int mod_count, + enum rxrpc_skb_trace why), - TP_ARGS(skb, op, usage, mod_count, where), + TP_ARGS(skb, usage, mod_count, why), TP_STRUCT__entry( __field(struct sk_buff *, skb ) - __field(enum rxrpc_skb_trace, op ) __field(int, usage ) __field(int, mod_count ) - __field(const void *, where ) + __field(enum rxrpc_skb_trace, why ) ), TP_fast_assign( __entry->skb = skb; - __entry->op = op; __entry->usage = usage; __entry->mod_count = mod_count; - __entry->where = where; + __entry->why = why; ), - TP_printk("s=%p Rx %s u=%d m=%d p=%pSR", + TP_printk("s=%p Rx %s u=%d m=%d", __entry->skb, - __print_symbolic(__entry->op, rxrpc_skb_traces), + __print_symbolic(__entry->why, rxrpc_skb_traces), __entry->usage, - __entry->mod_count, - __entry->where) + __entry->mod_count) ); TRACE_EVENT(rxrpc_rx_packet, @@ -623,6 +725,7 @@ TRACE_EVENT(rxrpc_txqueue, __field(rxrpc_seq_t, acks_hard_ack ) __field(rxrpc_seq_t, tx_bottom ) __field(rxrpc_seq_t, tx_top ) + __field(rxrpc_seq_t, tx_prepared ) __field(int, tx_winsize ) ), @@ -632,16 +735,18 @@ TRACE_EVENT(rxrpc_txqueue, __entry->acks_hard_ack = call->acks_hard_ack; __entry->tx_bottom = call->tx_bottom; __entry->tx_top = call->tx_top; + __entry->tx_prepared = call->tx_prepared; __entry->tx_winsize = call->tx_winsize; ), - TP_printk("c=%08x %s f=%08x h=%08x n=%u/%u/%u", + TP_printk("c=%08x %s f=%08x h=%08x n=%u/%u/%u/%u", __entry->call, __print_symbolic(__entry->why, rxrpc_txqueue_traces), __entry->tx_bottom, __entry->acks_hard_ack, __entry->tx_top - __entry->tx_bottom, __entry->tx_top - __entry->acks_hard_ack, + __entry->tx_prepared - __entry->tx_bottom, __entry->tx_winsize) ); @@ -733,6 +838,66 @@ TRACE_EVENT(rxrpc_rx_abort, __entry->abort_code) ); +TRACE_EVENT(rxrpc_rx_challenge, + TP_PROTO(struct rxrpc_connection *conn, rxrpc_serial_t serial, + u32 version, u32 nonce, u32 min_level), + + TP_ARGS(conn, serial, version, nonce, min_level), + + TP_STRUCT__entry( + __field(unsigned int, conn ) + __field(rxrpc_serial_t, serial ) + __field(u32, version ) + __field(u32, nonce ) + __field(u32, min_level ) + ), + + TP_fast_assign( + __entry->conn = conn->debug_id; + __entry->serial = serial; + __entry->version = version; + __entry->nonce = nonce; + __entry->min_level = min_level; + ), + + TP_printk("C=%08x CHALLENGE %08x v=%x n=%x ml=%x", + __entry->conn, + __entry->serial, + __entry->version, + __entry->nonce, + __entry->min_level) + ); + +TRACE_EVENT(rxrpc_rx_response, + TP_PROTO(struct rxrpc_connection *conn, rxrpc_serial_t serial, + u32 version, u32 kvno, u32 ticket_len), + + TP_ARGS(conn, serial, version, kvno, ticket_len), + + TP_STRUCT__entry( + __field(unsigned int, conn ) + __field(rxrpc_serial_t, serial ) + __field(u32, version ) + __field(u32, kvno ) + __field(u32, ticket_len ) + ), + + TP_fast_assign( + __entry->conn = conn->debug_id; + __entry->serial = serial; + __entry->version = version; + __entry->kvno = kvno; + __entry->ticket_len = ticket_len; + ), + + TP_printk("C=%08x RESPONSE %08x v=%x kvno=%x tl=%x", + __entry->conn, + __entry->serial, + __entry->version, + __entry->kvno, + __entry->ticket_len) + ); + TRACE_EVENT(rxrpc_rx_rwind_change, TP_PROTO(struct rxrpc_call *call, rxrpc_serial_t serial, u32 rwind, bool wake), @@ -1278,6 +1443,44 @@ TRACE_EVENT(rxrpc_congest, __entry->sum.retrans_timeo ? " rTxTo" : "") ); +TRACE_EVENT(rxrpc_reset_cwnd, + TP_PROTO(struct rxrpc_call *call, ktime_t now), + + TP_ARGS(call, now), + + TP_STRUCT__entry( + __field(unsigned int, call ) + __field(enum rxrpc_congest_mode, mode ) + __field(unsigned short, cwnd ) + __field(unsigned short, extra ) + __field(rxrpc_seq_t, hard_ack ) + __field(rxrpc_seq_t, prepared ) + __field(ktime_t, since_last_tx ) + __field(bool, has_data ) + ), + + TP_fast_assign( + __entry->call = call->debug_id; + __entry->mode = call->cong_mode; + __entry->cwnd = call->cong_cwnd; + __entry->extra = call->cong_extra; + __entry->hard_ack = call->acks_hard_ack; + __entry->prepared = call->tx_prepared - call->tx_bottom; + __entry->since_last_tx = ktime_sub(now, call->tx_last_sent); + __entry->has_data = !list_empty(&call->tx_sendmsg); + ), + + TP_printk("c=%08x q=%08x %s cw=%u+%u pr=%u tm=%llu d=%u", + __entry->call, + __entry->hard_ack, + __print_symbolic(__entry->mode, rxrpc_congest_modes), + __entry->cwnd, + __entry->extra, + __entry->prepared, + ktime_to_ns(__entry->since_last_tx), + __entry->has_data) + ); + TRACE_EVENT(rxrpc_disconnect_call, TP_PROTO(struct rxrpc_call *call), @@ -1352,6 +1555,7 @@ TRACE_EVENT(rxrpc_connect_call, __field(unsigned long, user_call_ID ) __field(u32, cid ) __field(u32, call_id ) + __field_struct(struct sockaddr_rxrpc, srx ) ), TP_fast_assign( @@ -1359,33 +1563,42 @@ TRACE_EVENT(rxrpc_connect_call, __entry->user_call_ID = call->user_call_ID; __entry->cid = call->cid; __entry->call_id = call->call_id; + __entry->srx = call->dest_srx; ), - TP_printk("c=%08x u=%p %08x:%08x", + TP_printk("c=%08x u=%p %08x:%08x dst=%pISp", __entry->call, (void *)__entry->user_call_ID, __entry->cid, - __entry->call_id) + __entry->call_id, + &__entry->srx.transport) ); TRACE_EVENT(rxrpc_resend, - TP_PROTO(struct rxrpc_call *call), + TP_PROTO(struct rxrpc_call *call, struct sk_buff *ack), - TP_ARGS(call), + TP_ARGS(call, ack), TP_STRUCT__entry( __field(unsigned int, call ) __field(rxrpc_seq_t, seq ) + __field(rxrpc_seq_t, transmitted ) + __field(rxrpc_serial_t, ack_serial ) ), TP_fast_assign( + struct rxrpc_skb_priv *sp = ack ? rxrpc_skb(ack) : NULL; __entry->call = call->debug_id; __entry->seq = call->acks_hard_ack; + __entry->transmitted = call->tx_transmitted; + __entry->ack_serial = sp ? sp->hdr.serial : 0; ), - TP_printk("c=%08x q=%x", + TP_printk("c=%08x r=%x q=%x tq=%x", __entry->call, - __entry->seq) + __entry->ack_serial, + __entry->seq, + __entry->transmitted) ); TRACE_EVENT(rxrpc_rx_icmp, @@ -1586,6 +1799,47 @@ TRACE_EVENT(rxrpc_txbuf, __entry->ref) ); +TRACE_EVENT(rxrpc_poke_call, + TP_PROTO(struct rxrpc_call *call, bool busy, + enum rxrpc_call_poke_trace what), + + TP_ARGS(call, busy, what), + + TP_STRUCT__entry( + __field(unsigned int, call_debug_id ) + __field(bool, busy ) + __field(enum rxrpc_call_poke_trace, what ) + ), + + TP_fast_assign( + __entry->call_debug_id = call->debug_id; + __entry->busy = busy; + __entry->what = what; + ), + + TP_printk("c=%08x %s%s", + __entry->call_debug_id, + __print_symbolic(__entry->what, rxrpc_call_poke_traces), + __entry->busy ? "!" : "") + ); + +TRACE_EVENT(rxrpc_call_poked, + TP_PROTO(struct rxrpc_call *call), + + TP_ARGS(call), + + TP_STRUCT__entry( + __field(unsigned int, call_debug_id ) + ), + + TP_fast_assign( + __entry->call_debug_id = call->debug_id; + ), + + TP_printk("c=%08x", + __entry->call_debug_id) + ); + #undef EM #undef E_ #endif /* _TRACE_RXRPC_H */ diff --git a/net/rxrpc/Kconfig b/net/rxrpc/Kconfig index accd35c05577..7ae023b37a83 100644 --- a/net/rxrpc/Kconfig +++ b/net/rxrpc/Kconfig @@ -58,4 +58,11 @@ config RXKAD See Documentation/networking/rxrpc.rst. +config RXPERF + tristate "RxRPC test service" + help + Provide an rxperf service tester. This listens on UDP port 7009 for + incoming calls from the rxperf program (an example of which can be + found in OpenAFS). + endif diff --git a/net/rxrpc/Makefile b/net/rxrpc/Makefile index fdeba488fc6e..e76d3459d78e 100644 --- a/net/rxrpc/Makefile +++ b/net/rxrpc/Makefile @@ -16,6 +16,7 @@ rxrpc-y := \ conn_service.o \ input.o \ insecure.o \ + io_thread.o \ key.o \ local_event.o \ local_object.o \ @@ -36,3 +37,6 @@ rxrpc-y := \ rxrpc-$(CONFIG_PROC_FS) += proc.o rxrpc-$(CONFIG_RXKAD) += rxkad.o rxrpc-$(CONFIG_SYSCTL) += sysctl.o + + +obj-$(CONFIG_RXPERF) += rxperf.o diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c index aacdd96a9886..7ea576f6ba4b 100644 --- a/net/rxrpc/af_rxrpc.c +++ b/net/rxrpc/af_rxrpc.c @@ -194,8 +194,8 @@ static int rxrpc_bind(struct socket *sock, struct sockaddr *saddr, int len) service_in_use: write_unlock(&local->services_lock); - rxrpc_unuse_local(local); - rxrpc_put_local(local); + rxrpc_unuse_local(local, rxrpc_local_unuse_bind); + rxrpc_put_local(local, rxrpc_local_put_bind); ret = -EADDRINUSE; error_unlock: release_sock(&rx->sk); @@ -328,7 +328,7 @@ struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock, mutex_unlock(&call->user_mutex); } - rxrpc_put_peer(cp.peer); + rxrpc_put_peer(cp.peer, rxrpc_peer_put_discard_tmp); _leave(" = %p", call); return call; } @@ -359,9 +359,9 @@ void rxrpc_kernel_end_call(struct socket *sock, struct rxrpc_call *call) /* Make sure we're not going to call back into a kernel service */ if (call->notify_rx) { - spin_lock_bh(&call->notify_lock); + spin_lock(&call->notify_lock); call->notify_rx = rxrpc_dummy_notify_rx; - spin_unlock_bh(&call->notify_lock); + spin_unlock(&call->notify_lock); } mutex_unlock(&call->user_mutex); @@ -812,14 +812,12 @@ static int rxrpc_shutdown(struct socket *sock, int flags) lock_sock(sk); - spin_lock_bh(&sk->sk_receive_queue.lock); if (sk->sk_state < RXRPC_CLOSE) { sk->sk_state = RXRPC_CLOSE; sk->sk_shutdown = SHUTDOWN_MASK; } else { ret = -ESHUTDOWN; } - spin_unlock_bh(&sk->sk_receive_queue.lock); rxrpc_discard_prealloc(rx); @@ -872,9 +870,7 @@ static int rxrpc_release_sock(struct sock *sk) break; } - spin_lock_bh(&sk->sk_receive_queue.lock); sk->sk_state = RXRPC_CLOSE; - spin_unlock_bh(&sk->sk_receive_queue.lock); if (rx->local && rcu_access_pointer(rx->local->service) == rx) { write_lock(&rx->local->services_lock); @@ -888,8 +884,8 @@ static int rxrpc_release_sock(struct sock *sk) flush_workqueue(rxrpc_workqueue); rxrpc_purge_queue(&sk->sk_receive_queue); - rxrpc_unuse_local(rx->local); - rxrpc_put_local(rx->local); + rxrpc_unuse_local(rx->local, rxrpc_local_unuse_release_sock); + rxrpc_put_local(rx->local, rxrpc_local_put_release_sock); rx->local = NULL; key_put(rx->key); rx->key = NULL; diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h index f5c538ce3e23..e7dccab7b741 100644 --- a/net/rxrpc/ar-internal.h +++ b/net/rxrpc/ar-internal.h @@ -36,6 +36,8 @@ struct rxrpc_txbuf; * to pass supplementary information. */ enum rxrpc_skb_mark { + RXRPC_SKB_MARK_PACKET, /* Received packet */ + RXRPC_SKB_MARK_ERROR, /* Error notification */ RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */ RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */ }; @@ -76,7 +78,7 @@ struct rxrpc_net { bool kill_all_client_conns; atomic_t nr_client_conns; spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ - spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ + struct mutex client_conn_discard_lock; /* Prevent multiple discarders */ struct list_head idle_client_conns; struct work_struct client_conn_reaper; struct timer_list client_conn_reap_timer; @@ -99,6 +101,9 @@ struct rxrpc_net { atomic_t stat_tx_data_retrans; atomic_t stat_tx_data_send; atomic_t stat_tx_data_send_frag; + atomic_t stat_tx_data_send_fail; + atomic_t stat_tx_data_underflow; + atomic_t stat_tx_data_cwnd_reset; atomic_t stat_rx_data; atomic_t stat_rx_data_reqack; atomic_t stat_rx_data_jumbo; @@ -110,6 +115,8 @@ struct rxrpc_net { atomic_t stat_rx_acks[256]; atomic_t stat_why_req_ack[8]; + + atomic_t stat_io_loop; }; /* @@ -279,13 +286,11 @@ struct rxrpc_local { struct rxrpc_net *rxnet; /* The network ns in which this resides */ struct hlist_node link; struct socket *socket; /* my UDP socket */ - struct work_struct processor; - struct list_head ack_tx_queue; /* List of ACKs that need sending */ - spinlock_t ack_tx_lock; /* ACK list lock */ + struct task_struct *io_thread; struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ - struct sk_buff_head reject_queue; /* packets awaiting rejection */ - struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ + struct sk_buff_head rx_queue; /* Received packets */ + struct list_head call_attend_q; /* Calls requiring immediate attention */ struct rb_root client_bundles; /* Client connection bundles by socket params */ spinlock_t client_bundles_lock; /* Lock for client_bundles */ spinlock_t lock; /* access lock */ @@ -403,12 +408,18 @@ enum rxrpc_conn_proto_state { * RxRPC client connection bundle. */ struct rxrpc_bundle { - struct rxrpc_conn_parameters params; + struct rxrpc_local *local; /* Representation of local endpoint */ + struct rxrpc_peer *peer; /* Remote endpoint */ + struct key *key; /* Security details */ refcount_t ref; atomic_t active; /* Number of active users */ unsigned int debug_id; + u32 security_level; /* Security level selected */ + u16 service_id; /* Service ID for this connection */ bool try_upgrade; /* True if the bundle is attempting upgrade */ bool alloc_conn; /* True if someone's getting a conn */ + bool exclusive; /* T if conn is exclusive */ + bool upgrade; /* T if service ID can be upgraded */ short alloc_error; /* Error from last conn allocation */ spinlock_t channel_lock; struct rb_node local_node; /* Node in local->client_conns */ @@ -424,9 +435,13 @@ struct rxrpc_bundle { */ struct rxrpc_connection { struct rxrpc_conn_proto proto; - struct rxrpc_conn_parameters params; + struct rxrpc_local *local; /* Representation of local endpoint */ + struct rxrpc_peer *peer; /* Remote endpoint */ + struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ + struct key *key; /* Security details */ refcount_t ref; + atomic_t active; /* Active count for service conns */ struct rcu_head rcu; struct list_head cache_link; @@ -447,6 +462,7 @@ struct rxrpc_connection { struct timer_list timer; /* Conn event timer */ struct work_struct processor; /* connection event processor */ + struct work_struct destructor; /* In-process-context destroyer */ struct rxrpc_bundle *bundle; /* Client connection bundle */ struct rb_node service_node; /* Node in peer->service_conns */ struct list_head proc_link; /* link in procfs list */ @@ -471,9 +487,13 @@ struct rxrpc_connection { atomic_t serial; /* packet serial number counter */ unsigned int hi_serial; /* highest serial number received */ u32 service_id; /* Service ID, possibly upgraded */ + u32 security_level; /* Security level selected */ u8 security_ix; /* security type */ u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ u8 bundle_shift; /* Index into bundle->avail_chans */ + bool exclusive; /* T if conn is exclusive */ + bool upgrade; /* T if service ID can be upgraded */ + u16 orig_service_id; /* Originally requested service ID */ short error; /* Local error code */ }; @@ -502,22 +522,19 @@ enum rxrpc_call_flag { RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ - RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */ RXRPC_CALL_KERNEL, /* The call was made by the kernel */ RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */ - RXRPC_CALL_DELAY_ACK_PENDING, /* DELAY ACK generation is pending */ - RXRPC_CALL_IDLE_ACK_PENDING, /* IDLE ACK generation is pending */ + RXRPC_CALL_EXCLUSIVE, /* The call uses a once-only connection */ + RXRPC_CALL_RX_IS_IDLE, /* Reception is idle - send an ACK */ }; /* * Events that can be raised on a call. */ enum rxrpc_call_event { - RXRPC_CALL_EV_ABORT, /* need to generate abort */ - RXRPC_CALL_EV_RESEND, /* Tx resend required */ - RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ + RXRPC_CALL_EV_INITIAL_PING, /* Send initial ping for a new service call */ }; /* @@ -570,10 +587,13 @@ struct rxrpc_call { struct rcu_head rcu; struct rxrpc_connection *conn; /* connection carrying call */ struct rxrpc_peer *peer; /* Peer record for remote address */ + struct rxrpc_local *local; /* Representation of local endpoint */ struct rxrpc_sock __rcu *socket; /* socket responsible */ struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ + struct key *key; /* Security details */ const struct rxrpc_security *security; /* applied security module */ struct mutex user_mutex; /* User access mutex */ + struct sockaddr_rxrpc dest_srx; /* Destination address */ unsigned long delay_ack_at; /* When DELAY ACK needs to happen */ unsigned long ack_lost_at; /* When ACK is figured as lost */ unsigned long resend_at; /* When next resend needs to happen */ @@ -585,7 +605,7 @@ struct rxrpc_call { u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ struct timer_list timer; /* Combined event timer */ - struct work_struct processor; /* Event processor */ + struct work_struct destroyer; /* In-process-context destroyer */ rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ struct list_head link; /* link in master call list */ struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */ @@ -594,6 +614,7 @@ struct rxrpc_call { struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ struct list_head sock_link; /* Link in rx->sock_calls */ struct rb_node sock_node; /* Node in rx->calls */ + struct list_head attend_link; /* Link in local->call_attend_q */ struct rxrpc_txbuf *tx_pending; /* Tx buffer being filled */ wait_queue_head_t waitq; /* Wait queue for channel or Tx */ s64 tx_total_len; /* Total length left to be transmitted (or -1) */ @@ -607,20 +628,22 @@ struct rxrpc_call { enum rxrpc_call_state state; /* current state of call */ enum rxrpc_call_completion completion; /* Call completion condition */ refcount_t ref; - u16 service_id; /* service ID */ u8 security_ix; /* Security type */ enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */ u32 call_id; /* call ID on connection */ u32 cid; /* connection ID plus channel index */ + u32 security_level; /* Security level selected */ int debug_id; /* debug ID for printks */ unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ unsigned short rx_pkt_len; /* Current recvmsg packet len */ /* Transmitted data tracking. */ spinlock_t tx_lock; /* Transmit queue lock */ + struct list_head tx_sendmsg; /* Sendmsg prepared packets */ struct list_head tx_buffer; /* Buffer of transmissible packets */ rxrpc_seq_t tx_bottom; /* First packet in buffer */ rxrpc_seq_t tx_transmitted; /* Highest packet transmitted */ + rxrpc_seq_t tx_prepared; /* Highest Tx slot prepared. */ rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ u16 tx_backoff; /* Delay to insert due to Tx failure */ u8 tx_winsize; /* Maximum size of Tx window */ @@ -635,13 +658,13 @@ struct rxrpc_call { rxrpc_seq_t rx_consumed; /* Highest packet consumed */ rxrpc_serial_t rx_serial; /* Highest serial received for this call */ u8 rx_winsize; /* Size of Rx window */ - spinlock_t input_lock; /* Lock for packet input to this call */ /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS * is fixed, we keep these numbers in terms of segments (ie. DATA * packets) rather than bytes. */ #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN +#define RXRPC_MIN_CWND (RXRPC_TX_SMSS > 2190 ? 2 : RXRPC_TX_SMSS > 1095 ? 3 : 4) u8 cong_cwnd; /* Congestion window size */ u8 cong_extra; /* Extra to send for congestion management */ u8 cong_ssthresh; /* Slow-start threshold */ @@ -676,11 +699,7 @@ struct rxrpc_call { rxrpc_seq_t acks_prev_seq; /* Highest previousPacket received */ rxrpc_seq_t acks_hard_ack; /* Latest hard-ack point */ rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ - rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ - rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ rxrpc_serial_t acks_highest_serial; /* Highest serial number ACK'd */ - struct sk_buff *acks_soft_tbl; /* The last ACK packet with NAKs in it */ - spinlock_t acks_ack_lock; /* Access to ->acks_last_ack */ }; /* @@ -739,9 +758,8 @@ struct rxrpc_send_params { */ struct rxrpc_txbuf { struct rcu_head rcu; - struct list_head call_link; /* Link in call->tx_queue */ + struct list_head call_link; /* Link in call->tx_sendmsg/tx_buffer */ struct list_head tx_link; /* Link in live Enc queue or Tx queue */ - struct rxrpc_call *call; /* Call to which belongs */ ktime_t last_sent; /* Time at which last transmitted */ refcount_t ref; rxrpc_seq_t seq; /* Sequence number of this packet */ @@ -793,9 +811,9 @@ extern struct workqueue_struct *rxrpc_workqueue; */ int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); void rxrpc_discard_prealloc(struct rxrpc_sock *); -struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, - struct rxrpc_sock *, - struct sk_buff *); +bool rxrpc_new_incoming_call(struct rxrpc_local *, struct rxrpc_peer *, + struct rxrpc_connection *, struct sockaddr_rxrpc *, + struct sk_buff *); void rxrpc_accept_incoming_calls(struct rxrpc_local *); int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long); @@ -808,14 +826,14 @@ void rxrpc_send_ACK(struct rxrpc_call *, u8, rxrpc_serial_t, enum rxrpc_propose_ void rxrpc_propose_delay_ACK(struct rxrpc_call *, rxrpc_serial_t, enum rxrpc_propose_ack_trace); void rxrpc_shrink_call_tx_buffer(struct rxrpc_call *); -void rxrpc_process_call(struct work_struct *); +void rxrpc_resend(struct rxrpc_call *call, struct sk_buff *ack_skb); void rxrpc_reduce_call_timer(struct rxrpc_call *call, unsigned long expire_at, unsigned long now, enum rxrpc_timer_trace why); -void rxrpc_delete_call_timer(struct rxrpc_call *call); +void rxrpc_input_call_event(struct rxrpc_call *call, struct sk_buff *skb); /* * call_object.c @@ -824,6 +842,7 @@ extern const char *const rxrpc_call_states[]; extern const char *const rxrpc_call_completions[]; extern struct kmem_cache *rxrpc_call_jar; +void rxrpc_poke_call(struct rxrpc_call *call, enum rxrpc_call_poke_trace what); struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, @@ -835,10 +854,8 @@ void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, struct sk_buff *); void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); void rxrpc_release_calls_on_socket(struct rxrpc_sock *); -bool __rxrpc_queue_call(struct rxrpc_call *); -bool rxrpc_queue_call(struct rxrpc_call *); -void rxrpc_see_call(struct rxrpc_call *); -bool rxrpc_try_get_call(struct rxrpc_call *call, enum rxrpc_call_trace op); +void rxrpc_see_call(struct rxrpc_call *, enum rxrpc_call_trace); +struct rxrpc_call *rxrpc_try_get_call(struct rxrpc_call *, enum rxrpc_call_trace); void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); void rxrpc_cleanup_call(struct rxrpc_call *); @@ -863,14 +880,14 @@ extern unsigned long rxrpc_conn_idle_client_fast_expiry; extern struct idr rxrpc_client_conn_ids; void rxrpc_destroy_client_conn_ids(void); -struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *); -void rxrpc_put_bundle(struct rxrpc_bundle *); +struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace); +void rxrpc_put_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace); int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, gfp_t); void rxrpc_expose_client_call(struct rxrpc_call *); void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *); -void rxrpc_put_client_conn(struct rxrpc_connection *); +void rxrpc_put_client_conn(struct rxrpc_connection *, enum rxrpc_conn_trace); void rxrpc_discard_expired_client_conns(struct work_struct *); void rxrpc_destroy_all_client_connections(struct rxrpc_net *); void rxrpc_clean_up_local_conns(struct rxrpc_local *); @@ -880,6 +897,7 @@ void rxrpc_clean_up_local_conns(struct rxrpc_local *); */ void rxrpc_process_connection(struct work_struct *); void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool); +int rxrpc_input_conn_packet(struct rxrpc_connection *conn, struct sk_buff *skb); /* * conn_object.c @@ -887,18 +905,20 @@ void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool); extern unsigned int rxrpc_connection_expiry; extern unsigned int rxrpc_closed_conn_expiry; -struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); -struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, - struct sk_buff *, - struct rxrpc_peer **); +struct rxrpc_connection *rxrpc_alloc_connection(struct rxrpc_net *, gfp_t); +struct rxrpc_connection *rxrpc_find_client_connection_rcu(struct rxrpc_local *, + struct sockaddr_rxrpc *, + struct sk_buff *); void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); void rxrpc_disconnect_call(struct rxrpc_call *); -void rxrpc_kill_connection(struct rxrpc_connection *); -bool rxrpc_queue_conn(struct rxrpc_connection *); -void rxrpc_see_connection(struct rxrpc_connection *); -struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *); -struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); -void rxrpc_put_service_conn(struct rxrpc_connection *); +void rxrpc_kill_client_conn(struct rxrpc_connection *); +void rxrpc_queue_conn(struct rxrpc_connection *, enum rxrpc_conn_trace); +void rxrpc_see_connection(struct rxrpc_connection *, enum rxrpc_conn_trace); +struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *, + enum rxrpc_conn_trace); +struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *, + enum rxrpc_conn_trace); +void rxrpc_put_connection(struct rxrpc_connection *, enum rxrpc_conn_trace); void rxrpc_service_connection_reaper(struct work_struct *); void rxrpc_destroy_all_connections(struct rxrpc_net *); @@ -912,17 +932,6 @@ static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) return !rxrpc_conn_is_client(conn); } -static inline void rxrpc_put_connection(struct rxrpc_connection *conn) -{ - if (!conn) - return; - - if (rxrpc_conn_is_client(conn)) - rxrpc_put_client_conn(conn); - else - rxrpc_put_service_conn(conn); -} - static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, unsigned long expire_at) { @@ -942,7 +951,20 @@ void rxrpc_unpublish_service_conn(struct rxrpc_connection *); /* * input.c */ -int rxrpc_input_packet(struct sock *, struct sk_buff *); +void rxrpc_congestion_degrade(struct rxrpc_call *); +void rxrpc_input_call_packet(struct rxrpc_call *, struct sk_buff *); +void rxrpc_implicit_end_call(struct rxrpc_call *, struct sk_buff *); + +/* + * io_thread.c + */ +int rxrpc_encap_rcv(struct sock *, struct sk_buff *); +void rxrpc_error_report(struct sock *); +int rxrpc_io_thread(void *data); +static inline void rxrpc_wake_up_io_thread(struct rxrpc_local *local) +{ + wake_up_process(local->io_thread); +} /* * insecure.c @@ -961,28 +983,41 @@ int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, /* * local_event.c */ -extern void rxrpc_process_local_events(struct rxrpc_local *); +void rxrpc_send_version_request(struct rxrpc_local *local, + struct rxrpc_host_header *hdr, + struct sk_buff *skb); /* * local_object.c */ struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); -struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); -struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); -void rxrpc_put_local(struct rxrpc_local *); -struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *); -void rxrpc_unuse_local(struct rxrpc_local *); -void rxrpc_queue_local(struct rxrpc_local *); +struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *, enum rxrpc_local_trace); +struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *, enum rxrpc_local_trace); +void rxrpc_put_local(struct rxrpc_local *, enum rxrpc_local_trace); +struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *, enum rxrpc_local_trace); +void rxrpc_unuse_local(struct rxrpc_local *, enum rxrpc_local_trace); +void rxrpc_destroy_local(struct rxrpc_local *local); void rxrpc_destroy_all_locals(struct rxrpc_net *); -static inline bool __rxrpc_unuse_local(struct rxrpc_local *local) +static inline bool __rxrpc_use_local(struct rxrpc_local *local, + enum rxrpc_local_trace why) { - return atomic_dec_return(&local->active_users) == 0; + int r, u; + + r = refcount_read(&local->ref); + u = atomic_fetch_add_unless(&local->active_users, 1, 0); + trace_rxrpc_local(local->debug_id, why, r, u); + return u != 0; } -static inline bool __rxrpc_use_local(struct rxrpc_local *local) +static inline void rxrpc_see_local(struct rxrpc_local *local, + enum rxrpc_local_trace why) { - return atomic_fetch_add_unless(&local->active_users, 1, 0) != 0; + int r, u; + + r = refcount_read(&local->ref); + u = atomic_read(&local->active_users); + trace_rxrpc_local(local->debug_id, why, r, u); } /* @@ -1009,16 +1044,17 @@ static inline struct rxrpc_net *rxrpc_net(struct net *net) /* * output.c */ -void rxrpc_transmit_ack_packets(struct rxrpc_local *); +int rxrpc_send_ack_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb); int rxrpc_send_abort_packet(struct rxrpc_call *); int rxrpc_send_data_packet(struct rxrpc_call *, struct rxrpc_txbuf *); -void rxrpc_reject_packets(struct rxrpc_local *); +void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb); void rxrpc_send_keepalive(struct rxrpc_peer *); +void rxrpc_transmit_one(struct rxrpc_call *call, struct rxrpc_txbuf *txb); /* * peer_event.c */ -void rxrpc_error_report(struct sock *); +void rxrpc_input_error(struct rxrpc_local *, struct sk_buff *); void rxrpc_peer_keepalive_worker(struct work_struct *); /* @@ -1028,14 +1064,15 @@ struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, const struct sockaddr_rxrpc *); struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *, struct sockaddr_rxrpc *, gfp_t); -struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); +struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t, + enum rxrpc_peer_trace); void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *, struct rxrpc_peer *); void rxrpc_destroy_all_peers(struct rxrpc_net *); -struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); -struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); -void rxrpc_put_peer(struct rxrpc_peer *); -void rxrpc_put_peer_locked(struct rxrpc_peer *); +struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *, enum rxrpc_peer_trace); +struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *, enum rxrpc_peer_trace); +void rxrpc_put_peer(struct rxrpc_peer *, enum rxrpc_peer_trace); +void rxrpc_put_peer_locked(struct rxrpc_peer *, enum rxrpc_peer_trace); /* * proc.c @@ -1097,6 +1134,7 @@ extern const struct rxrpc_security rxkad; int __init rxrpc_init_security(void); const struct rxrpc_security *rxrpc_security_lookup(u8); void rxrpc_exit_security(void); +int rxrpc_init_client_call_security(struct rxrpc_call *); int rxrpc_init_client_conn_security(struct rxrpc_connection *); const struct rxrpc_security *rxrpc_get_incoming_security(struct rxrpc_sock *, struct sk_buff *); @@ -1119,7 +1157,6 @@ int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int); * skbuff.c */ void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); -void rxrpc_packet_destructor(struct sk_buff *); void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace); @@ -1190,23 +1227,17 @@ extern unsigned int rxrpc_debug; #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) -#define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) -#define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) #if defined(__KDEBUG) #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) -#define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) -#define _net(FMT,...) knet(FMT,##__VA_ARGS__) #elif defined(CONFIG_AF_RXRPC_DEBUG) #define RXRPC_DEBUG_KENTER 0x01 #define RXRPC_DEBUG_KLEAVE 0x02 #define RXRPC_DEBUG_KDEBUG 0x04 -#define RXRPC_DEBUG_KPROTO 0x08 -#define RXRPC_DEBUG_KNET 0x10 #define _enter(FMT,...) \ do { \ @@ -1226,24 +1257,10 @@ do { \ kdebug(FMT,##__VA_ARGS__); \ } while (0) -#define _proto(FMT,...) \ -do { \ - if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ - kproto(FMT,##__VA_ARGS__); \ -} while (0) - -#define _net(FMT,...) \ -do { \ - if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ - knet(FMT,##__VA_ARGS__); \ -} while (0) - #else #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) -#define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) -#define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) #endif /* diff --git a/net/rxrpc/call_accept.c b/net/rxrpc/call_accept.c index 48790ee77019..d1850863507f 100644 --- a/net/rxrpc/call_accept.c +++ b/net/rxrpc/call_accept.c @@ -38,7 +38,6 @@ static int rxrpc_service_prealloc_one(struct rxrpc_sock *rx, unsigned long user_call_ID, gfp_t gfp, unsigned int debug_id) { - const void *here = __builtin_return_address(0); struct rxrpc_call *call, *xcall; struct rxrpc_net *rxnet = rxrpc_net(sock_net(&rx->sk)); struct rb_node *parent, **pp; @@ -70,7 +69,9 @@ static int rxrpc_service_prealloc_one(struct rxrpc_sock *rx, head = b->peer_backlog_head; tail = READ_ONCE(b->peer_backlog_tail); if (CIRC_CNT(head, tail, size) < max) { - struct rxrpc_peer *peer = rxrpc_alloc_peer(rx->local, gfp); + struct rxrpc_peer *peer; + + peer = rxrpc_alloc_peer(rx->local, gfp, rxrpc_peer_new_prealloc); if (!peer) return -ENOMEM; b->peer_backlog[head] = peer; @@ -89,9 +90,6 @@ static int rxrpc_service_prealloc_one(struct rxrpc_sock *rx, b->conn_backlog[head] = conn; smp_store_release(&b->conn_backlog_head, (head + 1) & (size - 1)); - - trace_rxrpc_conn(conn->debug_id, rxrpc_conn_new_service, - refcount_read(&conn->ref), here); } /* Now it gets complicated, because calls get registered with the @@ -102,10 +100,10 @@ static int rxrpc_service_prealloc_one(struct rxrpc_sock *rx, return -ENOMEM; call->flags |= (1 << RXRPC_CALL_IS_SERVICE); call->state = RXRPC_CALL_SERVER_PREALLOC; + __set_bit(RXRPC_CALL_EV_INITIAL_PING, &call->events); - trace_rxrpc_call(call->debug_id, rxrpc_call_new_service, - refcount_read(&call->ref), - here, (const void *)user_call_ID); + trace_rxrpc_call(call->debug_id, refcount_read(&call->ref), + user_call_ID, rxrpc_call_new_prealloc_service); write_lock(&rx->call_lock); @@ -126,11 +124,11 @@ static int rxrpc_service_prealloc_one(struct rxrpc_sock *rx, call->user_call_ID = user_call_ID; call->notify_rx = notify_rx; if (user_attach_call) { - rxrpc_get_call(call, rxrpc_call_got_kernel); + rxrpc_get_call(call, rxrpc_call_get_kernel_service); user_attach_call(call, user_call_ID); } - rxrpc_get_call(call, rxrpc_call_got_userid); + rxrpc_get_call(call, rxrpc_call_get_userid); rb_link_node(&call->sock_node, parent, pp); rb_insert_color(&call->sock_node, &rx->calls); set_bit(RXRPC_CALL_HAS_USERID, &call->flags); @@ -140,9 +138,9 @@ static int rxrpc_service_prealloc_one(struct rxrpc_sock *rx, write_unlock(&rx->call_lock); rxnet = call->rxnet; - spin_lock_bh(&rxnet->call_lock); + spin_lock(&rxnet->call_lock); list_add_tail_rcu(&call->link, &rxnet->calls); - spin_unlock_bh(&rxnet->call_lock); + spin_unlock(&rxnet->call_lock); b->call_backlog[call_head] = call; smp_store_release(&b->call_backlog_head, (call_head + 1) & (size - 1)); @@ -190,14 +188,14 @@ void rxrpc_discard_prealloc(struct rxrpc_sock *rx) /* Make sure that there aren't any incoming calls in progress before we * clear the preallocation buffers. */ - spin_lock_bh(&rx->incoming_lock); - spin_unlock_bh(&rx->incoming_lock); + spin_lock(&rx->incoming_lock); + spin_unlock(&rx->incoming_lock); head = b->peer_backlog_head; tail = b->peer_backlog_tail; while (CIRC_CNT(head, tail, size) > 0) { struct rxrpc_peer *peer = b->peer_backlog[tail]; - rxrpc_put_local(peer->local); + rxrpc_put_local(peer->local, rxrpc_local_put_prealloc_conn); kfree(peer); tail = (tail + 1) & (size - 1); } @@ -230,7 +228,7 @@ void rxrpc_discard_prealloc(struct rxrpc_sock *rx) } rxrpc_call_completed(call); rxrpc_release_call(rx, call); - rxrpc_put_call(call, rxrpc_call_put); + rxrpc_put_call(call, rxrpc_call_put_discard_prealloc); tail = (tail + 1) & (size - 1); } @@ -238,21 +236,6 @@ void rxrpc_discard_prealloc(struct rxrpc_sock *rx) } /* - * Ping the other end to fill our RTT cache and to retrieve the rwind - * and MTU parameters. - */ -static void rxrpc_send_ping(struct rxrpc_call *call, struct sk_buff *skb) -{ - struct rxrpc_skb_priv *sp = rxrpc_skb(skb); - ktime_t now = skb->tstamp; - - if (call->peer->rtt_count < 3 || - ktime_before(ktime_add_ms(call->peer->rtt_last_req, 1000), now)) - rxrpc_send_ACK(call, RXRPC_ACK_PING, sp->hdr.serial, - rxrpc_propose_ack_ping_for_params); -} - -/* * Allocate a new incoming call from the prealloc pool, along with a connection * and a peer as necessary. */ @@ -261,6 +244,7 @@ static struct rxrpc_call *rxrpc_alloc_incoming_call(struct rxrpc_sock *rx, struct rxrpc_peer *peer, struct rxrpc_connection *conn, const struct rxrpc_security *sec, + struct sockaddr_rxrpc *peer_srx, struct sk_buff *skb) { struct rxrpc_backlog *b = rx->backlog; @@ -286,12 +270,11 @@ static struct rxrpc_call *rxrpc_alloc_incoming_call(struct rxrpc_sock *rx, return NULL; if (!conn) { - if (peer && !rxrpc_get_peer_maybe(peer)) + if (peer && !rxrpc_get_peer_maybe(peer, rxrpc_peer_get_service_conn)) peer = NULL; if (!peer) { peer = b->peer_backlog[peer_tail]; - if (rxrpc_extract_addr_from_skb(&peer->srx, skb) < 0) - return NULL; + peer->srx = *peer_srx; b->peer_backlog[peer_tail] = NULL; smp_store_release(&b->peer_backlog_tail, (peer_tail + 1) & @@ -305,12 +288,13 @@ static struct rxrpc_call *rxrpc_alloc_incoming_call(struct rxrpc_sock *rx, b->conn_backlog[conn_tail] = NULL; smp_store_release(&b->conn_backlog_tail, (conn_tail + 1) & (RXRPC_BACKLOG_MAX - 1)); - conn->params.local = rxrpc_get_local(local); - conn->params.peer = peer; - rxrpc_see_connection(conn); + conn->local = rxrpc_get_local(local, rxrpc_local_get_prealloc_conn); + conn->peer = peer; + rxrpc_see_connection(conn, rxrpc_conn_see_new_service_conn); rxrpc_new_incoming_connection(rx, conn, sec, skb); } else { - rxrpc_get_connection(conn); + rxrpc_get_connection(conn, rxrpc_conn_get_service_conn); + atomic_inc(&conn->active); } /* And now we can allocate and set up a new call */ @@ -319,43 +303,69 @@ static struct rxrpc_call *rxrpc_alloc_incoming_call(struct rxrpc_sock *rx, smp_store_release(&b->call_backlog_tail, (call_tail + 1) & (RXRPC_BACKLOG_MAX - 1)); - rxrpc_see_call(call); + rxrpc_see_call(call, rxrpc_call_see_accept); + call->local = rxrpc_get_local(conn->local, rxrpc_local_get_call); call->conn = conn; call->security = conn->security; call->security_ix = conn->security_ix; - call->peer = rxrpc_get_peer(conn->params.peer); + call->peer = rxrpc_get_peer(conn->peer, rxrpc_peer_get_accept); + call->dest_srx = peer->srx; call->cong_ssthresh = call->peer->cong_ssthresh; call->tx_last_sent = ktime_get_real(); return call; } /* - * Set up a new incoming call. Called in BH context with the RCU read lock - * held. + * Set up a new incoming call. Called from the I/O thread. * * If this is for a kernel service, when we allocate the call, it will have * three refs on it: (1) the kernel service, (2) the user_call_ID tree, (3) the * retainer ref obtained from the backlog buffer. Prealloc calls for userspace - * services only have the ref from the backlog buffer. We want to pass this - * ref to non-BH context to dispose of. + * services only have the ref from the backlog buffer. * * If we want to report an error, we mark the skb with the packet type and - * abort code and return NULL. - * - * The call is returned with the user access mutex held. + * abort code and return false. */ -struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *local, - struct rxrpc_sock *rx, - struct sk_buff *skb) +bool rxrpc_new_incoming_call(struct rxrpc_local *local, + struct rxrpc_peer *peer, + struct rxrpc_connection *conn, + struct sockaddr_rxrpc *peer_srx, + struct sk_buff *skb) { - struct rxrpc_skb_priv *sp = rxrpc_skb(skb); const struct rxrpc_security *sec = NULL; - struct rxrpc_connection *conn; - struct rxrpc_peer *peer = NULL; + struct rxrpc_skb_priv *sp = rxrpc_skb(skb); struct rxrpc_call *call = NULL; + struct rxrpc_sock *rx; _enter(""); + /* Don't set up a call for anything other than the first DATA packet. */ + if (sp->hdr.seq != 1 || + sp->hdr.type != RXRPC_PACKET_TYPE_DATA) + return true; /* Just discard */ + + rcu_read_lock(); + + /* Weed out packets to services we're not offering. Packets that would + * begin a call are explicitly rejected and the rest are just + * discarded. + */ + rx = rcu_dereference(local->service); + if (!rx || (sp->hdr.serviceId != rx->srx.srx_service && + sp->hdr.serviceId != rx->second_service) + ) { + if (sp->hdr.type == RXRPC_PACKET_TYPE_DATA && + sp->hdr.seq == 1) + goto unsupported_service; + goto discard; + } + + if (!conn) { + sec = rxrpc_get_incoming_security(rx, skb); + if (!sec) + goto reject; + } + spin_lock(&rx->incoming_lock); if (rx->sk.sk_state == RXRPC_SERVER_LISTEN_DISABLED || rx->sk.sk_state == RXRPC_CLOSE) { @@ -366,20 +376,8 @@ struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *local, goto no_call; } - /* The peer, connection and call may all have sprung into existence due - * to a duplicate packet being handled on another CPU in parallel, so - * we have to recheck the routing. However, we're now holding - * rx->incoming_lock, so the values should remain stable. - */ - conn = rxrpc_find_connection_rcu(local, skb, &peer); - - if (!conn) { - sec = rxrpc_get_incoming_security(rx, skb); - if (!sec) - goto no_call; - } - - call = rxrpc_alloc_incoming_call(rx, local, peer, conn, sec, skb); + call = rxrpc_alloc_incoming_call(rx, local, peer, conn, sec, peer_srx, + skb); if (!call) { skb->mark = RXRPC_SKB_MARK_REJECT_BUSY; goto no_call; @@ -396,50 +394,41 @@ struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *local, rx->notify_new_call(&rx->sk, call, call->user_call_ID); spin_lock(&conn->state_lock); - switch (conn->state) { - case RXRPC_CONN_SERVICE_UNSECURED: + if (conn->state == RXRPC_CONN_SERVICE_UNSECURED) { conn->state = RXRPC_CONN_SERVICE_CHALLENGING; set_bit(RXRPC_CONN_EV_CHALLENGE, &call->conn->events); - rxrpc_queue_conn(call->conn); - break; - - case RXRPC_CONN_SERVICE: - write_lock(&call->state_lock); - if (call->state < RXRPC_CALL_COMPLETE) - call->state = RXRPC_CALL_SERVER_RECV_REQUEST; - write_unlock(&call->state_lock); - break; - - case RXRPC_CONN_REMOTELY_ABORTED: - rxrpc_set_call_completion(call, RXRPC_CALL_REMOTELY_ABORTED, - conn->abort_code, conn->error); - break; - case RXRPC_CONN_LOCALLY_ABORTED: - rxrpc_abort_call("CON", call, sp->hdr.seq, - conn->abort_code, conn->error); - break; - default: - BUG(); + rxrpc_queue_conn(call->conn, rxrpc_conn_queue_challenge); } spin_unlock(&conn->state_lock); - spin_unlock(&rx->incoming_lock); - rxrpc_send_ping(call, skb); + spin_unlock(&rx->incoming_lock); + rcu_read_unlock(); - /* We have to discard the prealloc queue's ref here and rely on a - * combination of the RCU read lock and refs held either by the socket - * (recvmsg queue, to-be-accepted queue or user ID tree) or the kernel - * service to prevent the call from being deallocated too early. - */ - rxrpc_put_call(call, rxrpc_call_put); + if (hlist_unhashed(&call->error_link)) { + spin_lock(&call->peer->lock); + hlist_add_head(&call->error_link, &call->peer->error_targets); + spin_unlock(&call->peer->lock); + } _leave(" = %p{%d}", call, call->debug_id); - return call; - + rxrpc_input_call_event(call, skb); + rxrpc_put_call(call, rxrpc_call_put_input); + return true; + +unsupported_service: + trace_rxrpc_abort(0, "INV", sp->hdr.cid, sp->hdr.callNumber, sp->hdr.seq, + RX_INVALID_OPERATION, EOPNOTSUPP); + skb->priority = RX_INVALID_OPERATION; + goto reject; no_call: spin_unlock(&rx->incoming_lock); - _leave(" = NULL [%u]", skb->mark); - return NULL; +reject: + rcu_read_unlock(); + _leave(" = f [%u]", skb->mark); + return false; +discard: + rcu_read_unlock(); + return true; } /* diff --git a/net/rxrpc/call_event.c b/net/rxrpc/call_event.c index 1e21a708390e..b2cf448fb02c 100644 --- a/net/rxrpc/call_event.c +++ b/net/rxrpc/call_event.c @@ -69,21 +69,15 @@ void rxrpc_propose_delay_ACK(struct rxrpc_call *call, rxrpc_serial_t serial, void rxrpc_send_ACK(struct rxrpc_call *call, u8 ack_reason, rxrpc_serial_t serial, enum rxrpc_propose_ack_trace why) { - struct rxrpc_local *local = call->conn->params.local; struct rxrpc_txbuf *txb; if (test_bit(RXRPC_CALL_DISCONNECTED, &call->flags)) return; - if (ack_reason == RXRPC_ACK_DELAY && - test_and_set_bit(RXRPC_CALL_DELAY_ACK_PENDING, &call->flags)) { - trace_rxrpc_drop_ack(call, why, ack_reason, serial, false); - return; - } rxrpc_inc_stat(call->rxnet, stat_tx_acks[ack_reason]); txb = rxrpc_alloc_txbuf(call, RXRPC_PACKET_TYPE_ACK, - in_softirq() ? GFP_ATOMIC | __GFP_NOWARN : GFP_NOFS); + rcu_read_lock_held() ? GFP_ATOMIC | __GFP_NOWARN : GFP_NOFS); if (!txb) { kleave(" = -ENOMEM"); return; @@ -101,22 +95,9 @@ void rxrpc_send_ACK(struct rxrpc_call *call, u8 ack_reason, txb->ack.reason = ack_reason; txb->ack.nAcks = 0; - if (!rxrpc_try_get_call(call, rxrpc_call_got)) { - rxrpc_put_txbuf(txb, rxrpc_txbuf_put_nomem); - return; - } - - spin_lock_bh(&local->ack_tx_lock); - list_add_tail(&txb->tx_link, &local->ack_tx_queue); - spin_unlock_bh(&local->ack_tx_lock); trace_rxrpc_send_ack(call, why, ack_reason, serial); - - if (in_task()) { - rxrpc_transmit_ack_packets(call->peer->local); - } else { - rxrpc_get_local(local); - rxrpc_queue_local(local); - } + rxrpc_send_ack_packet(call, txb); + rxrpc_put_txbuf(txb, rxrpc_txbuf_put_ack_tx); } /* @@ -130,11 +111,10 @@ static void rxrpc_congestion_timeout(struct rxrpc_call *call) /* * Perform retransmission of NAK'd and unack'd packets. */ -static void rxrpc_resend(struct rxrpc_call *call, unsigned long now_j) +void rxrpc_resend(struct rxrpc_call *call, struct sk_buff *ack_skb) { struct rxrpc_ackpacket *ack = NULL; struct rxrpc_txbuf *txb; - struct sk_buff *ack_skb = NULL; unsigned long resend_at; rxrpc_seq_t transmitted = READ_ONCE(call->tx_transmitted); ktime_t now, max_age, oldest, ack_ts; @@ -148,32 +128,21 @@ static void rxrpc_resend(struct rxrpc_call *call, unsigned long now_j) max_age = ktime_sub_us(now, jiffies_to_usecs(call->peer->rto_j)); oldest = now; - /* See if there's an ACK saved with a soft-ACK table in it. */ - if (call->acks_soft_tbl) { - spin_lock_bh(&call->acks_ack_lock); - ack_skb = call->acks_soft_tbl; - if (ack_skb) { - rxrpc_get_skb(ack_skb, rxrpc_skb_ack); - ack = (void *)ack_skb->data + sizeof(struct rxrpc_wire_header); - } - spin_unlock_bh(&call->acks_ack_lock); - } - if (list_empty(&call->tx_buffer)) goto no_resend; - spin_lock(&call->tx_lock); - if (list_empty(&call->tx_buffer)) goto no_further_resend; - trace_rxrpc_resend(call); + trace_rxrpc_resend(call, ack_skb); txb = list_first_entry(&call->tx_buffer, struct rxrpc_txbuf, call_link); /* Scan the soft ACK table without dropping the lock and resend any * explicitly NAK'd packets. */ - if (ack) { + if (ack_skb) { + ack = (void *)ack_skb->data + sizeof(struct rxrpc_wire_header); + for (i = 0; i < ack->nAcks; i++) { rxrpc_seq_t seq; @@ -197,8 +166,6 @@ static void rxrpc_resend(struct rxrpc_call *call, unsigned long now_j) rxrpc_see_txbuf(txb, rxrpc_txbuf_see_unacked); if (list_empty(&txb->tx_link)) { - rxrpc_get_txbuf(txb, rxrpc_txbuf_get_retrans); - rxrpc_get_call(call, rxrpc_call_got_tx); list_add_tail(&txb->tx_link, &retrans_queue); set_bit(RXRPC_TXBUF_RESENT, &txb->flags); } @@ -242,7 +209,6 @@ static void rxrpc_resend(struct rxrpc_call *call, unsigned long now_j) do_resend: unacked = true; if (list_empty(&txb->tx_link)) { - rxrpc_get_txbuf(txb, rxrpc_txbuf_get_retrans); list_add_tail(&txb->tx_link, &retrans_queue); set_bit(RXRPC_TXBUF_RESENT, &txb->flags); rxrpc_inc_stat(call->rxnet, stat_tx_data_retrans); @@ -250,10 +216,7 @@ static void rxrpc_resend(struct rxrpc_call *call, unsigned long now_j) } no_further_resend: - spin_unlock(&call->tx_lock); no_resend: - rxrpc_free_skb(ack_skb, rxrpc_skb_freed); - resend_at = nsecs_to_jiffies(ktime_to_ns(ktime_sub(now, oldest))); resend_at += jiffies + rxrpc_get_rto_backoff(call->peer, !list_empty(&retrans_queue)); @@ -267,7 +230,7 @@ no_resend: * retransmitting data. */ if (list_empty(&retrans_queue)) { - rxrpc_reduce_call_timer(call, resend_at, now_j, + rxrpc_reduce_call_timer(call, resend_at, jiffies, rxrpc_timer_set_for_resend); ack_ts = ktime_sub(now, call->acks_latest_ts); if (ktime_to_us(ack_ts) < (call->peer->srtt_us >> 3)) @@ -277,76 +240,134 @@ no_resend: goto out; } + /* Retransmit the queue */ while ((txb = list_first_entry_or_null(&retrans_queue, struct rxrpc_txbuf, tx_link))) { list_del_init(&txb->tx_link); - rxrpc_send_data_packet(call, txb); - rxrpc_put_txbuf(txb, rxrpc_txbuf_put_trans); - - trace_rxrpc_retransmit(call, txb->seq, - ktime_to_ns(ktime_sub(txb->last_sent, - max_age))); + rxrpc_transmit_one(call, txb); } out: _leave(""); } +static bool rxrpc_tx_window_has_space(struct rxrpc_call *call) +{ + unsigned int winsize = min_t(unsigned int, call->tx_winsize, + call->cong_cwnd + call->cong_extra); + rxrpc_seq_t window = call->acks_hard_ack, wtop = window + winsize; + rxrpc_seq_t tx_top = call->tx_top; + int space; + + space = wtop - tx_top; + return space > 0; +} + +/* + * Decant some if the sendmsg prepared queue into the transmission buffer. + */ +static void rxrpc_decant_prepared_tx(struct rxrpc_call *call) +{ + struct rxrpc_txbuf *txb; + + if (rxrpc_is_client_call(call) && + !test_bit(RXRPC_CALL_EXPOSED, &call->flags)) + rxrpc_expose_client_call(call); + + while ((txb = list_first_entry_or_null(&call->tx_sendmsg, + struct rxrpc_txbuf, call_link))) { + spin_lock(&call->tx_lock); + list_del(&txb->call_link); + spin_unlock(&call->tx_lock); + + call->tx_top = txb->seq; + list_add_tail(&txb->call_link, &call->tx_buffer); + + rxrpc_transmit_one(call, txb); + + if (!rxrpc_tx_window_has_space(call)) + break; + } +} + +static void rxrpc_transmit_some_data(struct rxrpc_call *call) +{ + switch (call->state) { + case RXRPC_CALL_SERVER_ACK_REQUEST: + if (list_empty(&call->tx_sendmsg)) + return; + fallthrough; + + case RXRPC_CALL_SERVER_SEND_REPLY: + case RXRPC_CALL_SERVER_AWAIT_ACK: + case RXRPC_CALL_CLIENT_SEND_REQUEST: + case RXRPC_CALL_CLIENT_AWAIT_REPLY: + if (!rxrpc_tx_window_has_space(call)) + return; + if (list_empty(&call->tx_sendmsg)) { + rxrpc_inc_stat(call->rxnet, stat_tx_data_underflow); + return; + } + rxrpc_decant_prepared_tx(call); + break; + default: + return; + } +} + +/* + * Ping the other end to fill our RTT cache and to retrieve the rwind + * and MTU parameters. + */ +static void rxrpc_send_initial_ping(struct rxrpc_call *call) +{ + if (call->peer->rtt_count < 3 || + ktime_before(ktime_add_ms(call->peer->rtt_last_req, 1000), + ktime_get_real())) + rxrpc_send_ACK(call, RXRPC_ACK_PING, 0, + rxrpc_propose_ack_ping_for_params); +} + /* * Handle retransmission and deferred ACK/abort generation. */ -void rxrpc_process_call(struct work_struct *work) +void rxrpc_input_call_event(struct rxrpc_call *call, struct sk_buff *skb) { - struct rxrpc_call *call = - container_of(work, struct rxrpc_call, processor); unsigned long now, next, t; - unsigned int iterations = 0; rxrpc_serial_t ackr_serial; + bool resend = false, expired = false; - rxrpc_see_call(call); + rxrpc_see_call(call, rxrpc_call_see_input); //printk("\n--------------------\n"); _enter("{%d,%s,%lx}", call->debug_id, rxrpc_call_states[call->state], call->events); -recheck_state: - /* Limit the number of times we do this before returning to the manager */ - iterations++; - if (iterations > 5) - goto requeue; - - if (test_and_clear_bit(RXRPC_CALL_EV_ABORT, &call->events)) { - rxrpc_send_abort_packet(call); - goto recheck_state; - } - - if (READ_ONCE(call->acks_hard_ack) != call->tx_bottom) - rxrpc_shrink_call_tx_buffer(call); + if (call->state == RXRPC_CALL_COMPLETE) + goto out; - if (call->state == RXRPC_CALL_COMPLETE) { - rxrpc_delete_call_timer(call); - goto out_put; - } + if (skb && skb->mark == RXRPC_SKB_MARK_ERROR) + goto out; - /* Work out if any timeouts tripped */ + /* If we see our async-event poke, check for timeout trippage. */ now = jiffies; t = READ_ONCE(call->expect_rx_by); if (time_after_eq(now, t)) { trace_rxrpc_timer(call, rxrpc_timer_exp_normal, now); - set_bit(RXRPC_CALL_EV_EXPIRED, &call->events); + expired = true; } t = READ_ONCE(call->expect_req_by); if (call->state == RXRPC_CALL_SERVER_RECV_REQUEST && time_after_eq(now, t)) { trace_rxrpc_timer(call, rxrpc_timer_exp_idle, now); - set_bit(RXRPC_CALL_EV_EXPIRED, &call->events); + expired = true; } t = READ_ONCE(call->expect_term_by); if (time_after_eq(now, t)) { trace_rxrpc_timer(call, rxrpc_timer_exp_hard, now); - set_bit(RXRPC_CALL_EV_EXPIRED, &call->events); + expired = true; } t = READ_ONCE(call->delay_ack_at); @@ -385,11 +406,26 @@ recheck_state: if (time_after_eq(now, t)) { trace_rxrpc_timer(call, rxrpc_timer_exp_resend, now); cmpxchg(&call->resend_at, t, now + MAX_JIFFY_OFFSET); - set_bit(RXRPC_CALL_EV_RESEND, &call->events); + resend = true; } + if (skb) + rxrpc_input_call_packet(call, skb); + + rxrpc_transmit_some_data(call); + + if (skb) { + struct rxrpc_skb_priv *sp = rxrpc_skb(skb); + + if (sp->hdr.type == RXRPC_PACKET_TYPE_ACK) + rxrpc_congestion_degrade(call); + } + + if (test_and_clear_bit(RXRPC_CALL_EV_INITIAL_PING, &call->events)) + rxrpc_send_initial_ping(call); + /* Process events */ - if (test_and_clear_bit(RXRPC_CALL_EV_EXPIRED, &call->events)) { + if (expired) { if (test_bit(RXRPC_CALL_RX_HEARD, &call->flags) && (int)call->conn->hi_serial - (int)call->rx_serial > 0) { trace_rxrpc_call_reset(call); @@ -397,52 +433,50 @@ recheck_state: } else { rxrpc_abort_call("EXP", call, 0, RX_CALL_TIMEOUT, -ETIME); } - set_bit(RXRPC_CALL_EV_ABORT, &call->events); - goto recheck_state; + rxrpc_send_abort_packet(call); + goto out; } - if (test_and_clear_bit(RXRPC_CALL_EV_ACK_LOST, &call->events)) { - call->acks_lost_top = call->tx_top; + if (test_and_clear_bit(RXRPC_CALL_EV_ACK_LOST, &call->events)) rxrpc_send_ACK(call, RXRPC_ACK_PING, 0, rxrpc_propose_ack_ping_for_lost_ack); - } - if (test_and_clear_bit(RXRPC_CALL_EV_RESEND, &call->events) && - call->state != RXRPC_CALL_CLIENT_RECV_REPLY) { - rxrpc_resend(call, now); - goto recheck_state; - } + if (resend && call->state != RXRPC_CALL_CLIENT_RECV_REPLY) + rxrpc_resend(call, NULL); + + if (test_and_clear_bit(RXRPC_CALL_RX_IS_IDLE, &call->flags)) + rxrpc_send_ACK(call, RXRPC_ACK_IDLE, 0, + rxrpc_propose_ack_rx_idle); + + if (atomic_read(&call->ackr_nr_unacked) > 2) + rxrpc_send_ACK(call, RXRPC_ACK_IDLE, 0, + rxrpc_propose_ack_input_data); /* Make sure the timer is restarted */ - next = call->expect_rx_by; + if (call->state != RXRPC_CALL_COMPLETE) { + next = call->expect_rx_by; #define set(T) { t = READ_ONCE(T); if (time_before(t, next)) next = t; } - set(call->expect_req_by); - set(call->expect_term_by); - set(call->delay_ack_at); - set(call->ack_lost_at); - set(call->resend_at); - set(call->keepalive_at); - set(call->ping_at); - - now = jiffies; - if (time_after_eq(now, next)) - goto recheck_state; + set(call->expect_req_by); + set(call->expect_term_by); + set(call->delay_ack_at); + set(call->ack_lost_at); + set(call->resend_at); + set(call->keepalive_at); + set(call->ping_at); - rxrpc_reduce_call_timer(call, next, now, rxrpc_timer_restart); + now = jiffies; + if (time_after_eq(now, next)) + rxrpc_poke_call(call, rxrpc_call_poke_timer_now); - /* other events may have been raised since we started checking */ - if (call->events && call->state < RXRPC_CALL_COMPLETE) - goto requeue; + rxrpc_reduce_call_timer(call, next, now, rxrpc_timer_restart); + } -out_put: - rxrpc_put_call(call, rxrpc_call_put); out: + if (call->state == RXRPC_CALL_COMPLETE) + del_timer_sync(&call->timer); + if (call->acks_hard_ack != call->tx_bottom) + rxrpc_shrink_call_tx_buffer(call); _leave(""); - return; - -requeue: - __rxrpc_queue_call(call); - goto out; } diff --git a/net/rxrpc/call_object.c b/net/rxrpc/call_object.c index 1befe22cd301..be5eb8cdf549 100644 --- a/net/rxrpc/call_object.c +++ b/net/rxrpc/call_object.c @@ -45,6 +45,24 @@ static struct semaphore rxrpc_call_limiter = static struct semaphore rxrpc_kernel_call_limiter = __SEMAPHORE_INITIALIZER(rxrpc_kernel_call_limiter, 1000); +void rxrpc_poke_call(struct rxrpc_call *call, enum rxrpc_call_poke_trace what) +{ + struct rxrpc_local *local = call->local; + bool busy; + + if (call->state < RXRPC_CALL_COMPLETE) { + spin_lock_bh(&local->lock); + busy = !list_empty(&call->attend_link); + trace_rxrpc_poke_call(call, busy, what); + if (!busy) { + rxrpc_get_call(call, rxrpc_call_get_poke); + list_add_tail(&call->attend_link, &local->call_attend_q); + } + spin_unlock_bh(&local->lock); + rxrpc_wake_up_io_thread(local); + } +} + static void rxrpc_call_timer_expired(struct timer_list *t) { struct rxrpc_call *call = from_timer(call, t, timer); @@ -53,9 +71,7 @@ static void rxrpc_call_timer_expired(struct timer_list *t) if (call->state < RXRPC_CALL_COMPLETE) { trace_rxrpc_timer_expired(call, jiffies); - __rxrpc_queue_call(call); - } else { - rxrpc_put_call(call, rxrpc_call_put); + rxrpc_poke_call(call, rxrpc_call_poke_timer); } } @@ -64,21 +80,14 @@ void rxrpc_reduce_call_timer(struct rxrpc_call *call, unsigned long now, enum rxrpc_timer_trace why) { - if (rxrpc_try_get_call(call, rxrpc_call_got_timer)) { - trace_rxrpc_timer(call, why, now); - if (timer_reduce(&call->timer, expire_at)) - rxrpc_put_call(call, rxrpc_call_put_notimer); - } -} - -void rxrpc_delete_call_timer(struct rxrpc_call *call) -{ - if (del_timer_sync(&call->timer)) - rxrpc_put_call(call, rxrpc_call_put_timer); + trace_rxrpc_timer(call, why, now); + timer_reduce(&call->timer, expire_at); } static struct lock_class_key rxrpc_call_user_mutex_lock_class_key; +static void rxrpc_destroy_call(struct work_struct *); + /* * find an extant server call * - called in process context with IRQs enabled @@ -110,7 +119,7 @@ struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *rx, return NULL; found_extant_call: - rxrpc_get_call(call, rxrpc_call_got); + rxrpc_get_call(call, rxrpc_call_get_sendmsg); read_unlock(&rx->call_lock); _leave(" = %p [%d]", call, refcount_read(&call->ref)); return call; @@ -139,20 +148,20 @@ struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *rx, gfp_t gfp, &rxrpc_call_user_mutex_lock_class_key); timer_setup(&call->timer, rxrpc_call_timer_expired, 0); - INIT_WORK(&call->processor, &rxrpc_process_call); + INIT_WORK(&call->destroyer, rxrpc_destroy_call); INIT_LIST_HEAD(&call->link); INIT_LIST_HEAD(&call->chan_wait_link); INIT_LIST_HEAD(&call->accept_link); INIT_LIST_HEAD(&call->recvmsg_link); INIT_LIST_HEAD(&call->sock_link); + INIT_LIST_HEAD(&call->attend_link); + INIT_LIST_HEAD(&call->tx_sendmsg); INIT_LIST_HEAD(&call->tx_buffer); skb_queue_head_init(&call->recvmsg_queue); skb_queue_head_init(&call->rx_oos_queue); init_waitqueue_head(&call->waitq); spin_lock_init(&call->notify_lock); spin_lock_init(&call->tx_lock); - spin_lock_init(&call->input_lock); - spin_lock_init(&call->acks_ack_lock); rwlock_init(&call->state_lock); refcount_set(&call->ref, 1); call->debug_id = debug_id; @@ -185,22 +194,45 @@ struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *rx, gfp_t gfp, */ static struct rxrpc_call *rxrpc_alloc_client_call(struct rxrpc_sock *rx, struct sockaddr_rxrpc *srx, + struct rxrpc_conn_parameters *cp, + struct rxrpc_call_params *p, gfp_t gfp, unsigned int debug_id) { struct rxrpc_call *call; ktime_t now; + int ret; _enter(""); call = rxrpc_alloc_call(rx, gfp, debug_id); if (!call) return ERR_PTR(-ENOMEM); - call->state = RXRPC_CALL_CLIENT_AWAIT_CONN; - call->service_id = srx->srx_service; now = ktime_get_real(); - call->acks_latest_ts = now; - call->cong_tstamp = now; + call->acks_latest_ts = now; + call->cong_tstamp = now; + call->state = RXRPC_CALL_CLIENT_AWAIT_CONN; + call->dest_srx = *srx; + call->interruptibility = p->interruptibility; + call->tx_total_len = p->tx_total_len; + call->key = key_get(cp->key); + call->local = rxrpc_get_local(cp->local, rxrpc_local_get_call); + if (p->kernel) + __set_bit(RXRPC_CALL_KERNEL, &call->flags); + if (cp->upgrade) + __set_bit(RXRPC_CALL_UPGRADE, &call->flags); + if (cp->exclusive) + __set_bit(RXRPC_CALL_EXCLUSIVE, &call->flags); + + ret = rxrpc_init_client_call_security(call); + if (ret < 0) { + __rxrpc_set_call_completion(call, RXRPC_CALL_LOCAL_ERROR, 0, ret); + rxrpc_put_call(call, rxrpc_call_put_discard_error); + return ERR_PTR(ret); + } + + trace_rxrpc_call(call->debug_id, refcount_read(&call->ref), + p->user_call_ID, rxrpc_call_new_client); _leave(" = %p", call); return call; @@ -218,6 +250,7 @@ static void rxrpc_start_call_timer(struct rxrpc_call *call) call->ack_lost_at = j; call->resend_at = j; call->ping_at = j; + call->keepalive_at = j; call->expect_rx_by = j; call->expect_req_by = j; call->expect_term_by = j; @@ -270,7 +303,6 @@ struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx, struct rxrpc_net *rxnet; struct semaphore *limiter; struct rb_node *parent, **pp; - const void *here = __builtin_return_address(0); int ret; _enter("%p,%lx", rx, p->user_call_ID); @@ -281,7 +313,7 @@ struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx, return ERR_PTR(-ERESTARTSYS); } - call = rxrpc_alloc_client_call(rx, srx, gfp, debug_id); + call = rxrpc_alloc_client_call(rx, srx, cp, p, gfp, debug_id); if (IS_ERR(call)) { release_sock(&rx->sk); up(limiter); @@ -289,14 +321,6 @@ struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx, return call; } - call->interruptibility = p->interruptibility; - call->tx_total_len = p->tx_total_len; - trace_rxrpc_call(call->debug_id, rxrpc_call_new_client, - refcount_read(&call->ref), - here, (const void *)p->user_call_ID); - if (p->kernel) - __set_bit(RXRPC_CALL_KERNEL, &call->flags); - /* We need to protect a partially set up call against the user as we * will be acting outside the socket lock. */ @@ -322,7 +346,7 @@ struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx, rcu_assign_pointer(call->socket, rx); call->user_call_ID = p->user_call_ID; __set_bit(RXRPC_CALL_HAS_USERID, &call->flags); - rxrpc_get_call(call, rxrpc_call_got_userid); + rxrpc_get_call(call, rxrpc_call_get_userid); rb_link_node(&call->sock_node, parent, pp); rb_insert_color(&call->sock_node, &rx->calls); list_add(&call->sock_link, &rx->sock_calls); @@ -330,9 +354,9 @@ struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx, write_unlock(&rx->call_lock); rxnet = call->rxnet; - spin_lock_bh(&rxnet->call_lock); + spin_lock(&rxnet->call_lock); list_add_tail_rcu(&call->link, &rxnet->calls); - spin_unlock_bh(&rxnet->call_lock); + spin_unlock(&rxnet->call_lock); /* From this point on, the call is protected by its own lock. */ release_sock(&rx->sk); @@ -344,13 +368,10 @@ struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx, if (ret < 0) goto error_attached_to_socket; - trace_rxrpc_call(call->debug_id, rxrpc_call_connected, - refcount_read(&call->ref), here, NULL); + rxrpc_see_call(call, rxrpc_call_see_connected); rxrpc_start_call_timer(call); - _net("CALL new %d on CONN %d", call->debug_id, call->conn->debug_id); - _leave(" = %p [new]", call); return call; @@ -364,11 +385,11 @@ error_dup_user_ID: release_sock(&rx->sk); __rxrpc_set_call_completion(call, RXRPC_CALL_LOCAL_ERROR, RX_CALL_DEAD, -EEXIST); - trace_rxrpc_call(call->debug_id, rxrpc_call_error, - refcount_read(&call->ref), here, ERR_PTR(-EEXIST)); + trace_rxrpc_call(call->debug_id, refcount_read(&call->ref), 0, + rxrpc_call_see_userid_exists); rxrpc_release_call(rx, call); mutex_unlock(&call->user_mutex); - rxrpc_put_call(call, rxrpc_call_put); + rxrpc_put_call(call, rxrpc_call_put_userid_exists); _leave(" = -EEXIST"); return ERR_PTR(-EEXIST); @@ -378,8 +399,8 @@ error_dup_user_ID: * leave the error to recvmsg() to deal with. */ error_attached_to_socket: - trace_rxrpc_call(call->debug_id, rxrpc_call_error, - refcount_read(&call->ref), here, ERR_PTR(ret)); + trace_rxrpc_call(call->debug_id, refcount_read(&call->ref), ret, + rxrpc_call_see_connect_failed); set_bit(RXRPC_CALL_DISCONNECTED, &call->flags); __rxrpc_set_call_completion(call, RXRPC_CALL_LOCAL_ERROR, RX_CALL_DEAD, ret); @@ -403,11 +424,34 @@ void rxrpc_incoming_call(struct rxrpc_sock *rx, rcu_assign_pointer(call->socket, rx); call->call_id = sp->hdr.callNumber; - call->service_id = sp->hdr.serviceId; + call->dest_srx.srx_service = sp->hdr.serviceId; call->cid = sp->hdr.cid; call->state = RXRPC_CALL_SERVER_SECURING; call->cong_tstamp = skb->tstamp; + spin_lock(&conn->state_lock); + + switch (conn->state) { + case RXRPC_CONN_SERVICE_UNSECURED: + case RXRPC_CONN_SERVICE_CHALLENGING: + call->state = RXRPC_CALL_SERVER_SECURING; + break; + case RXRPC_CONN_SERVICE: + call->state = RXRPC_CALL_SERVER_RECV_REQUEST; + break; + + case RXRPC_CONN_REMOTELY_ABORTED: + __rxrpc_set_call_completion(call, RXRPC_CALL_REMOTELY_ABORTED, + conn->abort_code, conn->error); + break; + case RXRPC_CONN_LOCALLY_ABORTED: + __rxrpc_abort_call("CON", call, 1, + conn->abort_code, conn->error); + break; + default: + BUG(); + } + /* Set the channel for this call. We don't get channel_lock as we're * only defending against the data_ready handler (which we're called * from) and the RESPONSE packet parser (which is only really @@ -418,86 +462,48 @@ void rxrpc_incoming_call(struct rxrpc_sock *rx, conn->channels[chan].call_counter = call->call_id; conn->channels[chan].call_id = call->call_id; rcu_assign_pointer(conn->channels[chan].call, call); + spin_unlock(&conn->state_lock); - spin_lock(&conn->params.peer->lock); - hlist_add_head_rcu(&call->error_link, &conn->params.peer->error_targets); - spin_unlock(&conn->params.peer->lock); - - _net("CALL incoming %d on CONN %d", call->debug_id, call->conn->debug_id); + spin_lock(&conn->peer->lock); + hlist_add_head(&call->error_link, &conn->peer->error_targets); + spin_unlock(&conn->peer->lock); rxrpc_start_call_timer(call); _leave(""); } /* - * Queue a call's work processor, getting a ref to pass to the work queue. - */ -bool rxrpc_queue_call(struct rxrpc_call *call) -{ - const void *here = __builtin_return_address(0); - int n; - - if (!__refcount_inc_not_zero(&call->ref, &n)) - return false; - if (rxrpc_queue_work(&call->processor)) - trace_rxrpc_call(call->debug_id, rxrpc_call_queued, n + 1, - here, NULL); - else - rxrpc_put_call(call, rxrpc_call_put_noqueue); - return true; -} - -/* - * Queue a call's work processor, passing the callers ref to the work queue. - */ -bool __rxrpc_queue_call(struct rxrpc_call *call) -{ - const void *here = __builtin_return_address(0); - int n = refcount_read(&call->ref); - ASSERTCMP(n, >=, 1); - if (rxrpc_queue_work(&call->processor)) - trace_rxrpc_call(call->debug_id, rxrpc_call_queued_ref, n, - here, NULL); - else - rxrpc_put_call(call, rxrpc_call_put_noqueue); - return true; -} - -/* * Note the re-emergence of a call. */ -void rxrpc_see_call(struct rxrpc_call *call) +void rxrpc_see_call(struct rxrpc_call *call, enum rxrpc_call_trace why) { - const void *here = __builtin_return_address(0); if (call) { - int n = refcount_read(&call->ref); + int r = refcount_read(&call->ref); - trace_rxrpc_call(call->debug_id, rxrpc_call_seen, n, - here, NULL); + trace_rxrpc_call(call->debug_id, r, 0, why); } } -bool rxrpc_try_get_call(struct rxrpc_call *call, enum rxrpc_call_trace op) +struct rxrpc_call *rxrpc_try_get_call(struct rxrpc_call *call, + enum rxrpc_call_trace why) { - const void *here = __builtin_return_address(0); - int n; + int r; - if (!__refcount_inc_not_zero(&call->ref, &n)) - return false; - trace_rxrpc_call(call->debug_id, op, n + 1, here, NULL); - return true; + if (!call || !__refcount_inc_not_zero(&call->ref, &r)) + return NULL; + trace_rxrpc_call(call->debug_id, r + 1, 0, why); + return call; } /* * Note the addition of a ref on a call. */ -void rxrpc_get_call(struct rxrpc_call *call, enum rxrpc_call_trace op) +void rxrpc_get_call(struct rxrpc_call *call, enum rxrpc_call_trace why) { - const void *here = __builtin_return_address(0); - int n; + int r; - __refcount_inc(&call->ref, &n); - trace_rxrpc_call(call->debug_id, op, n + 1, here, NULL); + __refcount_inc(&call->ref, &r); + trace_rxrpc_call(call->debug_id, r + 1, 0, why); } /* @@ -514,15 +520,13 @@ static void rxrpc_cleanup_ring(struct rxrpc_call *call) */ void rxrpc_release_call(struct rxrpc_sock *rx, struct rxrpc_call *call) { - const void *here = __builtin_return_address(0); struct rxrpc_connection *conn = call->conn; bool put = false; _enter("{%d,%d}", call->debug_id, refcount_read(&call->ref)); - trace_rxrpc_call(call->debug_id, rxrpc_call_release, - refcount_read(&call->ref), - here, (const void *)call->flags); + trace_rxrpc_call(call->debug_id, refcount_read(&call->ref), + call->flags, rxrpc_call_see_release); ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE); @@ -530,10 +534,10 @@ void rxrpc_release_call(struct rxrpc_sock *rx, struct rxrpc_call *call) BUG(); rxrpc_put_call_slot(call); - rxrpc_delete_call_timer(call); + del_timer_sync(&call->timer); /* Make sure we don't get any more notifications */ - write_lock_bh(&rx->recvmsg_lock); + write_lock(&rx->recvmsg_lock); if (!list_empty(&call->recvmsg_link)) { _debug("unlinking once-pending call %p { e=%lx f=%lx }", @@ -546,16 +550,16 @@ void rxrpc_release_call(struct rxrpc_sock *rx, struct rxrpc_call *call) call->recvmsg_link.next = NULL; call->recvmsg_link.prev = NULL; - write_unlock_bh(&rx->recvmsg_lock); + write_unlock(&rx->recvmsg_lock); if (put) - rxrpc_put_call(call, rxrpc_call_put); + rxrpc_put_call(call, rxrpc_call_put_unnotify); write_lock(&rx->call_lock); if (test_and_clear_bit(RXRPC_CALL_HAS_USERID, &call->flags)) { rb_erase(&call->sock_node, &rx->calls); memset(&call->sock_node, 0xdd, sizeof(call->sock_node)); - rxrpc_put_call(call, rxrpc_call_put_userid); + rxrpc_put_call(call, rxrpc_call_put_userid_exists); } list_del(&call->sock_link); @@ -584,17 +588,17 @@ void rxrpc_release_calls_on_socket(struct rxrpc_sock *rx) struct rxrpc_call, accept_link); list_del(&call->accept_link); rxrpc_abort_call("SKR", call, 0, RX_CALL_DEAD, -ECONNRESET); - rxrpc_put_call(call, rxrpc_call_put); + rxrpc_put_call(call, rxrpc_call_put_release_sock_tba); } while (!list_empty(&rx->sock_calls)) { call = list_entry(rx->sock_calls.next, struct rxrpc_call, sock_link); - rxrpc_get_call(call, rxrpc_call_got); + rxrpc_get_call(call, rxrpc_call_get_release_sock); rxrpc_abort_call("SKT", call, 0, RX_CALL_DEAD, -ECONNRESET); rxrpc_send_abort_packet(call); rxrpc_release_call(rx, call); - rxrpc_put_call(call, rxrpc_call_put); + rxrpc_put_call(call, rxrpc_call_put_release_sock); } _leave(""); @@ -603,26 +607,24 @@ void rxrpc_release_calls_on_socket(struct rxrpc_sock *rx) /* * release a call */ -void rxrpc_put_call(struct rxrpc_call *call, enum rxrpc_call_trace op) +void rxrpc_put_call(struct rxrpc_call *call, enum rxrpc_call_trace why) { struct rxrpc_net *rxnet = call->rxnet; - const void *here = __builtin_return_address(0); unsigned int debug_id = call->debug_id; bool dead; - int n; + int r; ASSERT(call != NULL); - dead = __refcount_dec_and_test(&call->ref, &n); - trace_rxrpc_call(debug_id, op, n, here, NULL); + dead = __refcount_dec_and_test(&call->ref, &r); + trace_rxrpc_call(debug_id, r - 1, 0, why); if (dead) { - _debug("call %d dead", call->debug_id); ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE); if (!list_empty(&call->link)) { - spin_lock_bh(&rxnet->call_lock); + spin_lock(&rxnet->call_lock); list_del_init(&call->link); - spin_unlock_bh(&rxnet->call_lock); + spin_unlock(&rxnet->call_lock); } rxrpc_cleanup_call(call); @@ -630,36 +632,45 @@ void rxrpc_put_call(struct rxrpc_call *call, enum rxrpc_call_trace op) } /* - * Final call destruction - but must be done in process context. + * Free up the call under RCU. */ -static void rxrpc_destroy_call(struct work_struct *work) +static void rxrpc_rcu_free_call(struct rcu_head *rcu) { - struct rxrpc_call *call = container_of(work, struct rxrpc_call, processor); - struct rxrpc_net *rxnet = call->rxnet; - - rxrpc_delete_call_timer(call); + struct rxrpc_call *call = container_of(rcu, struct rxrpc_call, rcu); + struct rxrpc_net *rxnet = READ_ONCE(call->rxnet); - rxrpc_put_connection(call->conn); - rxrpc_put_peer(call->peer); kmem_cache_free(rxrpc_call_jar, call); if (atomic_dec_and_test(&rxnet->nr_calls)) wake_up_var(&rxnet->nr_calls); } /* - * Final call destruction under RCU. + * Final call destruction - but must be done in process context. */ -static void rxrpc_rcu_destroy_call(struct rcu_head *rcu) +static void rxrpc_destroy_call(struct work_struct *work) { - struct rxrpc_call *call = container_of(rcu, struct rxrpc_call, rcu); + struct rxrpc_call *call = container_of(work, struct rxrpc_call, destroyer); + struct rxrpc_txbuf *txb; - if (in_softirq()) { - INIT_WORK(&call->processor, rxrpc_destroy_call); - if (!rxrpc_queue_work(&call->processor)) - BUG(); - } else { - rxrpc_destroy_call(&call->processor); + del_timer_sync(&call->timer); + + rxrpc_cleanup_ring(call); + while ((txb = list_first_entry_or_null(&call->tx_sendmsg, + struct rxrpc_txbuf, call_link))) { + list_del(&txb->call_link); + rxrpc_put_txbuf(txb, rxrpc_txbuf_put_cleaned); } + while ((txb = list_first_entry_or_null(&call->tx_buffer, + struct rxrpc_txbuf, call_link))) { + list_del(&txb->call_link); + rxrpc_put_txbuf(txb, rxrpc_txbuf_put_cleaned); + } + + rxrpc_put_txbuf(call->tx_pending, rxrpc_txbuf_put_cleaned); + rxrpc_put_connection(call->conn, rxrpc_conn_put_call); + rxrpc_put_peer(call->peer, rxrpc_peer_put_call); + rxrpc_put_local(call->local, rxrpc_local_put_call); + call_rcu(&call->rcu, rxrpc_rcu_free_call); } /* @@ -667,25 +678,20 @@ static void rxrpc_rcu_destroy_call(struct rcu_head *rcu) */ void rxrpc_cleanup_call(struct rxrpc_call *call) { - struct rxrpc_txbuf *txb; - - _net("DESTROY CALL %d", call->debug_id); - memset(&call->sock_node, 0xcd, sizeof(call->sock_node)); ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE); ASSERT(test_bit(RXRPC_CALL_RELEASED, &call->flags)); - rxrpc_cleanup_ring(call); - while ((txb = list_first_entry_or_null(&call->tx_buffer, - struct rxrpc_txbuf, call_link))) { - list_del(&txb->call_link); - rxrpc_put_txbuf(txb, rxrpc_txbuf_put_cleaned); - } - rxrpc_put_txbuf(call->tx_pending, rxrpc_txbuf_put_cleaned); - rxrpc_free_skb(call->acks_soft_tbl, rxrpc_skb_cleaned); + del_timer(&call->timer); - call_rcu(&call->rcu, rxrpc_rcu_destroy_call); + if (rcu_read_lock_held()) + /* Can't use the rxrpc workqueue as we need to cancel/flush + * something that may be running/waiting there. + */ + schedule_work(&call->destroyer); + else + rxrpc_destroy_call(&call->destroyer); } /* @@ -700,14 +706,14 @@ void rxrpc_destroy_all_calls(struct rxrpc_net *rxnet) _enter(""); if (!list_empty(&rxnet->calls)) { - spin_lock_bh(&rxnet->call_lock); + spin_lock(&rxnet->call_lock); while (!list_empty(&rxnet->calls)) { call = list_entry(rxnet->calls.next, struct rxrpc_call, link); _debug("Zapping call %p", call); - rxrpc_see_call(call); + rxrpc_see_call(call, rxrpc_call_see_zap); list_del_init(&call->link); pr_err("Call %p still in use (%d,%s,%lx,%lx)!\n", @@ -715,12 +721,12 @@ void rxrpc_destroy_all_calls(struct rxrpc_net *rxnet) rxrpc_call_states[call->state], call->flags, call->events); - spin_unlock_bh(&rxnet->call_lock); + spin_unlock(&rxnet->call_lock); cond_resched(); - spin_lock_bh(&rxnet->call_lock); + spin_lock(&rxnet->call_lock); } - spin_unlock_bh(&rxnet->call_lock); + spin_unlock(&rxnet->call_lock); } atomic_dec(&rxnet->nr_calls); diff --git a/net/rxrpc/conn_client.c b/net/rxrpc/conn_client.c index f11c97e28d2a..a08e33c9e54b 100644 --- a/net/rxrpc/conn_client.c +++ b/net/rxrpc/conn_client.c @@ -51,7 +51,7 @@ static void rxrpc_deactivate_bundle(struct rxrpc_bundle *bundle); static int rxrpc_get_client_connection_id(struct rxrpc_connection *conn, gfp_t gfp) { - struct rxrpc_net *rxnet = conn->params.local->rxnet; + struct rxrpc_net *rxnet = conn->rxnet; int id; _enter(""); @@ -122,37 +122,47 @@ static struct rxrpc_bundle *rxrpc_alloc_bundle(struct rxrpc_conn_parameters *cp, bundle = kzalloc(sizeof(*bundle), gfp); if (bundle) { - bundle->params = *cp; - rxrpc_get_peer(bundle->params.peer); + bundle->local = cp->local; + bundle->peer = rxrpc_get_peer(cp->peer, rxrpc_peer_get_bundle); + bundle->key = cp->key; + bundle->exclusive = cp->exclusive; + bundle->upgrade = cp->upgrade; + bundle->service_id = cp->service_id; + bundle->security_level = cp->security_level; refcount_set(&bundle->ref, 1); atomic_set(&bundle->active, 1); spin_lock_init(&bundle->channel_lock); INIT_LIST_HEAD(&bundle->waiting_calls); + trace_rxrpc_bundle(bundle->debug_id, 1, rxrpc_bundle_new); } return bundle; } -struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *bundle) +struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *bundle, + enum rxrpc_bundle_trace why) { - refcount_inc(&bundle->ref); + int r; + + __refcount_inc(&bundle->ref, &r); + trace_rxrpc_bundle(bundle->debug_id, r + 1, why); return bundle; } static void rxrpc_free_bundle(struct rxrpc_bundle *bundle) { - rxrpc_put_peer(bundle->params.peer); + trace_rxrpc_bundle(bundle->debug_id, 1, rxrpc_bundle_free); + rxrpc_put_peer(bundle->peer, rxrpc_peer_put_bundle); kfree(bundle); } -void rxrpc_put_bundle(struct rxrpc_bundle *bundle) +void rxrpc_put_bundle(struct rxrpc_bundle *bundle, enum rxrpc_bundle_trace why) { - unsigned int d = bundle->debug_id; + unsigned int id = bundle->debug_id; bool dead; int r; dead = __refcount_dec_and_test(&bundle->ref, &r); - - _debug("PUT B=%x %d", d, r - 1); + trace_rxrpc_bundle(id, r - 1, why); if (dead) rxrpc_free_bundle(bundle); } @@ -164,12 +174,12 @@ static struct rxrpc_connection * rxrpc_alloc_client_connection(struct rxrpc_bundle *bundle, gfp_t gfp) { struct rxrpc_connection *conn; - struct rxrpc_net *rxnet = bundle->params.local->rxnet; + struct rxrpc_net *rxnet = bundle->local->rxnet; int ret; _enter(""); - conn = rxrpc_alloc_connection(gfp); + conn = rxrpc_alloc_connection(rxnet, gfp); if (!conn) { _leave(" = -ENOMEM"); return ERR_PTR(-ENOMEM); @@ -177,10 +187,16 @@ rxrpc_alloc_client_connection(struct rxrpc_bundle *bundle, gfp_t gfp) refcount_set(&conn->ref, 1); conn->bundle = bundle; - conn->params = bundle->params; + conn->local = bundle->local; + conn->peer = bundle->peer; + conn->key = bundle->key; + conn->exclusive = bundle->exclusive; + conn->upgrade = bundle->upgrade; + conn->orig_service_id = bundle->service_id; + conn->security_level = bundle->security_level; conn->out_clientflag = RXRPC_CLIENT_INITIATED; conn->state = RXRPC_CONN_CLIENT; - conn->service_id = conn->params.service_id; + conn->service_id = conn->orig_service_id; ret = rxrpc_get_client_connection_id(conn, gfp); if (ret < 0) @@ -195,14 +211,13 @@ rxrpc_alloc_client_connection(struct rxrpc_bundle *bundle, gfp_t gfp) list_add_tail(&conn->proc_link, &rxnet->conn_proc_list); write_unlock(&rxnet->conn_lock); - rxrpc_get_bundle(bundle); - rxrpc_get_peer(conn->params.peer); - rxrpc_get_local(conn->params.local); - key_get(conn->params.key); + rxrpc_get_bundle(bundle, rxrpc_bundle_get_client_conn); + rxrpc_get_peer(conn->peer, rxrpc_peer_get_client_conn); + rxrpc_get_local(conn->local, rxrpc_local_get_client_conn); + key_get(conn->key); - trace_rxrpc_conn(conn->debug_id, rxrpc_conn_new_client, - refcount_read(&conn->ref), - __builtin_return_address(0)); + trace_rxrpc_conn(conn->debug_id, refcount_read(&conn->ref), + rxrpc_conn_new_client); atomic_inc(&rxnet->nr_client_conns); trace_rxrpc_client(conn, -1, rxrpc_client_alloc); @@ -228,7 +243,7 @@ static bool rxrpc_may_reuse_conn(struct rxrpc_connection *conn) if (!conn) goto dont_reuse; - rxnet = conn->params.local->rxnet; + rxnet = conn->rxnet; if (test_bit(RXRPC_CONN_DONT_REUSE, &conn->flags)) goto dont_reuse; @@ -285,7 +300,7 @@ static struct rxrpc_bundle *rxrpc_look_up_bundle(struct rxrpc_conn_parameters *c while (p) { bundle = rb_entry(p, struct rxrpc_bundle, local_node); -#define cmp(X) ((long)bundle->params.X - (long)cp->X) +#define cmp(X) ((long)bundle->X - (long)cp->X) diff = (cmp(peer) ?: cmp(key) ?: cmp(security_level) ?: @@ -314,7 +329,7 @@ static struct rxrpc_bundle *rxrpc_look_up_bundle(struct rxrpc_conn_parameters *c parent = *pp; bundle = rb_entry(parent, struct rxrpc_bundle, local_node); -#define cmp(X) ((long)bundle->params.X - (long)cp->X) +#define cmp(X) ((long)bundle->X - (long)cp->X) diff = (cmp(peer) ?: cmp(key) ?: cmp(security_level) ?: @@ -332,7 +347,7 @@ static struct rxrpc_bundle *rxrpc_look_up_bundle(struct rxrpc_conn_parameters *c candidate->debug_id = atomic_inc_return(&rxrpc_bundle_id); rb_link_node(&candidate->local_node, parent, pp); rb_insert_color(&candidate->local_node, &local->client_bundles); - rxrpc_get_bundle(candidate); + rxrpc_get_bundle(candidate, rxrpc_bundle_get_client_call); spin_unlock(&local->client_bundles_lock); _leave(" = %u [new]", candidate->debug_id); return candidate; @@ -340,7 +355,7 @@ static struct rxrpc_bundle *rxrpc_look_up_bundle(struct rxrpc_conn_parameters *c found_bundle_free: rxrpc_free_bundle(candidate); found_bundle: - rxrpc_get_bundle(bundle); + rxrpc_get_bundle(bundle, rxrpc_bundle_get_client_call); atomic_inc(&bundle->active); spin_unlock(&local->client_bundles_lock); _leave(" = %u [found]", bundle->debug_id); @@ -456,10 +471,10 @@ static void rxrpc_add_conn_to_bundle(struct rxrpc_bundle *bundle, gfp_t gfp) if (candidate) { _debug("discard C=%x", candidate->debug_id); trace_rxrpc_client(candidate, -1, rxrpc_client_duplicate); - rxrpc_put_connection(candidate); + rxrpc_put_connection(candidate, rxrpc_conn_put_discard); } - rxrpc_put_connection(old); + rxrpc_put_connection(old, rxrpc_conn_put_noreuse); _leave(""); } @@ -530,23 +545,21 @@ static void rxrpc_activate_one_channel(struct rxrpc_connection *conn, clear_bit(RXRPC_CONN_FINAL_ACK_0 + channel, &conn->flags); clear_bit(conn->bundle_shift + channel, &bundle->avail_chans); - rxrpc_see_call(call); + rxrpc_see_call(call, rxrpc_call_see_activate_client); list_del_init(&call->chan_wait_link); - call->peer = rxrpc_get_peer(conn->params.peer); - call->conn = rxrpc_get_connection(conn); + call->peer = rxrpc_get_peer(conn->peer, rxrpc_peer_get_activate_call); + call->conn = rxrpc_get_connection(conn, rxrpc_conn_get_activate_call); call->cid = conn->proto.cid | channel; call->call_id = call_id; call->security = conn->security; call->security_ix = conn->security_ix; - call->service_id = conn->service_id; + call->dest_srx.srx_service = conn->service_id; trace_rxrpc_connect_call(call); - _net("CONNECT call %08x:%08x as call %d on conn %d", - call->cid, call->call_id, call->debug_id, conn->debug_id); - write_lock_bh(&call->state_lock); + write_lock(&call->state_lock); call->state = RXRPC_CALL_CLIENT_SEND_REQUEST; - write_unlock_bh(&call->state_lock); + write_unlock(&call->state_lock); /* Paired with the read barrier in rxrpc_connect_call(). This orders * cid and epoch in the connection wrt to call_id without the need to @@ -571,7 +584,7 @@ static void rxrpc_activate_one_channel(struct rxrpc_connection *conn, */ static void rxrpc_unidle_conn(struct rxrpc_bundle *bundle, struct rxrpc_connection *conn) { - struct rxrpc_net *rxnet = bundle->params.local->rxnet; + struct rxrpc_net *rxnet = bundle->local->rxnet; bool drop_ref; if (!list_empty(&conn->cache_link)) { @@ -583,7 +596,7 @@ static void rxrpc_unidle_conn(struct rxrpc_bundle *bundle, struct rxrpc_connecti } spin_unlock(&rxnet->client_conn_cache_lock); if (drop_ref) - rxrpc_put_connection(conn); + rxrpc_put_connection(conn, rxrpc_conn_put_unidle); } } @@ -732,7 +745,7 @@ granted_channel: out_put_bundle: rxrpc_deactivate_bundle(bundle); - rxrpc_put_bundle(bundle); + rxrpc_put_bundle(bundle, rxrpc_bundle_get_client_call); out: _leave(" = %d", ret); return ret; @@ -773,6 +786,10 @@ void rxrpc_expose_client_call(struct rxrpc_call *call) if (chan->call_counter >= INT_MAX) set_bit(RXRPC_CONN_DONT_REUSE, &conn->flags); trace_rxrpc_client(conn, channel, rxrpc_client_exposed); + + spin_lock(&call->peer->lock); + hlist_add_head(&call->error_link, &call->peer->error_targets); + spin_unlock(&call->peer->lock); } } @@ -797,7 +814,7 @@ void rxrpc_disconnect_client_call(struct rxrpc_bundle *bundle, struct rxrpc_call { struct rxrpc_connection *conn; struct rxrpc_channel *chan = NULL; - struct rxrpc_net *rxnet = bundle->params.local->rxnet; + struct rxrpc_net *rxnet = bundle->local->rxnet; unsigned int channel; bool may_reuse; u32 cid; @@ -887,7 +904,7 @@ void rxrpc_disconnect_client_call(struct rxrpc_bundle *bundle, struct rxrpc_call trace_rxrpc_client(conn, channel, rxrpc_client_to_idle); conn->idle_timestamp = jiffies; - rxrpc_get_connection(conn); + rxrpc_get_connection(conn, rxrpc_conn_get_idle); spin_lock(&rxnet->client_conn_cache_lock); list_move_tail(&conn->cache_link, &rxnet->idle_client_conns); spin_unlock(&rxnet->client_conn_cache_lock); @@ -929,7 +946,7 @@ static void rxrpc_unbundle_conn(struct rxrpc_connection *conn) if (need_drop) { rxrpc_deactivate_bundle(bundle); - rxrpc_put_connection(conn); + rxrpc_put_connection(conn, rxrpc_conn_put_unbundle); } } @@ -938,11 +955,11 @@ static void rxrpc_unbundle_conn(struct rxrpc_connection *conn) */ static void rxrpc_deactivate_bundle(struct rxrpc_bundle *bundle) { - struct rxrpc_local *local = bundle->params.local; + struct rxrpc_local *local = bundle->local; bool need_put = false; if (atomic_dec_and_lock(&bundle->active, &local->client_bundles_lock)) { - if (!bundle->params.exclusive) { + if (!bundle->exclusive) { _debug("erase bundle"); rb_erase(&bundle->local_node, &local->client_bundles); need_put = true; @@ -950,16 +967,16 @@ static void rxrpc_deactivate_bundle(struct rxrpc_bundle *bundle) spin_unlock(&local->client_bundles_lock); if (need_put) - rxrpc_put_bundle(bundle); + rxrpc_put_bundle(bundle, rxrpc_bundle_put_discard); } } /* * Clean up a dead client connection. */ -static void rxrpc_kill_client_conn(struct rxrpc_connection *conn) +void rxrpc_kill_client_conn(struct rxrpc_connection *conn) { - struct rxrpc_local *local = conn->params.local; + struct rxrpc_local *local = conn->local; struct rxrpc_net *rxnet = local->rxnet; _enter("C=%x", conn->debug_id); @@ -968,23 +985,6 @@ static void rxrpc_kill_client_conn(struct rxrpc_connection *conn) atomic_dec(&rxnet->nr_client_conns); rxrpc_put_client_connection_id(conn); - rxrpc_kill_connection(conn); -} - -/* - * Clean up a dead client connections. - */ -void rxrpc_put_client_conn(struct rxrpc_connection *conn) -{ - const void *here = __builtin_return_address(0); - unsigned int debug_id = conn->debug_id; - bool dead; - int r; - - dead = __refcount_dec_and_test(&conn->ref, &r); - trace_rxrpc_conn(debug_id, rxrpc_conn_put_client, r - 1, here); - if (dead) - rxrpc_kill_client_conn(conn); } /* @@ -1010,7 +1010,7 @@ void rxrpc_discard_expired_client_conns(struct work_struct *work) } /* Don't double up on the discarding */ - if (!spin_trylock(&rxnet->client_conn_discard_lock)) { + if (!mutex_trylock(&rxnet->client_conn_discard_lock)) { _leave(" [already]"); return; } @@ -1038,7 +1038,7 @@ next: expiry = rxrpc_conn_idle_client_expiry; if (nr_conns > rxrpc_reap_client_connections) expiry = rxrpc_conn_idle_client_fast_expiry; - if (conn->params.local->service_closed) + if (conn->local->service_closed) expiry = rxrpc_closed_conn_expiry * HZ; conn_expires_at = conn->idle_timestamp + expiry; @@ -1048,13 +1048,15 @@ next: goto not_yet_expired; } + atomic_dec(&conn->active); trace_rxrpc_client(conn, -1, rxrpc_client_discard); list_del_init(&conn->cache_link); spin_unlock(&rxnet->client_conn_cache_lock); rxrpc_unbundle_conn(conn); - rxrpc_put_connection(conn); /* Drop the ->cache_link ref */ + /* Drop the ->cache_link ref */ + rxrpc_put_connection(conn, rxrpc_conn_put_discard_idle); nr_conns--; goto next; @@ -1073,7 +1075,7 @@ not_yet_expired: out: spin_unlock(&rxnet->client_conn_cache_lock); - spin_unlock(&rxnet->client_conn_discard_lock); + mutex_unlock(&rxnet->client_conn_discard_lock); _leave(""); } @@ -1112,7 +1114,8 @@ void rxrpc_clean_up_local_conns(struct rxrpc_local *local) list_for_each_entry_safe(conn, tmp, &rxnet->idle_client_conns, cache_link) { - if (conn->params.local == local) { + if (conn->local == local) { + atomic_dec(&conn->active); trace_rxrpc_client(conn, -1, rxrpc_client_discard); list_move(&conn->cache_link, &graveyard); } @@ -1125,7 +1128,7 @@ void rxrpc_clean_up_local_conns(struct rxrpc_local *local) struct rxrpc_connection, cache_link); list_del_init(&conn->cache_link); rxrpc_unbundle_conn(conn); - rxrpc_put_connection(conn); + rxrpc_put_connection(conn, rxrpc_conn_put_local_dead); } _leave(" [culled]"); diff --git a/net/rxrpc/conn_event.c b/net/rxrpc/conn_event.c index aab069701398..480364bcbf85 100644 --- a/net/rxrpc/conn_event.c +++ b/net/rxrpc/conn_event.c @@ -52,8 +52,8 @@ static void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn, if (skb && call_id != sp->hdr.callNumber) return; - msg.msg_name = &conn->params.peer->srx.transport; - msg.msg_namelen = conn->params.peer->srx.transport_len; + msg.msg_name = &conn->peer->srx.transport; + msg.msg_namelen = conn->peer->srx.transport_len; msg.msg_control = NULL; msg.msg_controllen = 0; msg.msg_flags = 0; @@ -86,8 +86,8 @@ static void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn, break; case RXRPC_PACKET_TYPE_ACK: - mtu = conn->params.peer->if_mtu; - mtu -= conn->params.peer->hdrsize; + mtu = conn->peer->if_mtu; + mtu -= conn->peer->hdrsize; pkt.ack.bufferSpace = 0; pkt.ack.maxSkew = htons(skb ? skb->priority : 0); pkt.ack.firstPacket = htonl(chan->last_seq + 1); @@ -122,19 +122,17 @@ static void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn, switch (chan->last_type) { case RXRPC_PACKET_TYPE_ABORT: - _proto("Tx ABORT %%%u { %d } [re]", serial, conn->abort_code); break; case RXRPC_PACKET_TYPE_ACK: trace_rxrpc_tx_ack(chan->call_debug_id, serial, ntohl(pkt.ack.firstPacket), ntohl(pkt.ack.serial), pkt.ack.reason, 0); - _proto("Tx ACK %%%u [re]", serial); break; } - ret = kernel_sendmsg(conn->params.local->socket, &msg, iov, ioc, len); - conn->params.peer->last_tx_at = ktime_get_seconds(); + ret = kernel_sendmsg(conn->local->socket, &msg, iov, ioc, len); + conn->peer->last_tx_at = ktime_get_seconds(); if (ret < 0) trace_rxrpc_tx_fail(chan->call_debug_id, serial, ret, rxrpc_tx_point_call_final_resend); @@ -200,9 +198,9 @@ static int rxrpc_abort_connection(struct rxrpc_connection *conn, _enter("%d,,%u,%u", conn->debug_id, error, abort_code); /* generate a connection-level abort */ - spin_lock_bh(&conn->state_lock); + spin_lock(&conn->state_lock); if (conn->state >= RXRPC_CONN_REMOTELY_ABORTED) { - spin_unlock_bh(&conn->state_lock); + spin_unlock(&conn->state_lock); _leave(" = 0 [already dead]"); return 0; } @@ -211,10 +209,10 @@ static int rxrpc_abort_connection(struct rxrpc_connection *conn, conn->abort_code = abort_code; conn->state = RXRPC_CONN_LOCALLY_ABORTED; set_bit(RXRPC_CONN_DONT_REUSE, &conn->flags); - spin_unlock_bh(&conn->state_lock); + spin_unlock(&conn->state_lock); - msg.msg_name = &conn->params.peer->srx.transport; - msg.msg_namelen = conn->params.peer->srx.transport_len; + msg.msg_name = &conn->peer->srx.transport; + msg.msg_namelen = conn->peer->srx.transport_len; msg.msg_control = NULL; msg.msg_controllen = 0; msg.msg_flags = 0; @@ -242,9 +240,8 @@ static int rxrpc_abort_connection(struct rxrpc_connection *conn, serial = atomic_inc_return(&conn->serial); rxrpc_abort_calls(conn, RXRPC_CALL_LOCALLY_ABORTED, serial); whdr.serial = htonl(serial); - _proto("Tx CONN ABORT %%%u { %d }", serial, conn->abort_code); - ret = kernel_sendmsg(conn->params.local->socket, &msg, iov, 2, len); + ret = kernel_sendmsg(conn->local->socket, &msg, iov, 2, len); if (ret < 0) { trace_rxrpc_tx_fail(conn->debug_id, serial, ret, rxrpc_tx_point_conn_abort); @@ -254,7 +251,7 @@ static int rxrpc_abort_connection(struct rxrpc_connection *conn, trace_rxrpc_tx_packet(conn->debug_id, &whdr, rxrpc_tx_point_conn_abort); - conn->params.peer->last_tx_at = ktime_get_seconds(); + conn->peer->last_tx_at = ktime_get_seconds(); _leave(" = 0"); return 0; @@ -268,12 +265,12 @@ static void rxrpc_call_is_secure(struct rxrpc_call *call) { _enter("%p", call); if (call) { - write_lock_bh(&call->state_lock); + write_lock(&call->state_lock); if (call->state == RXRPC_CALL_SERVER_SECURING) { call->state = RXRPC_CALL_SERVER_RECV_REQUEST; rxrpc_notify_socket(call); } - write_unlock_bh(&call->state_lock); + write_unlock(&call->state_lock); } } @@ -285,8 +282,6 @@ static int rxrpc_process_event(struct rxrpc_connection *conn, u32 *_abort_code) { struct rxrpc_skb_priv *sp = rxrpc_skb(skb); - __be32 wtmp; - u32 abort_code; int loop, ret; if (conn->state >= RXRPC_CONN_REMOTELY_ABORTED) { @@ -308,17 +303,8 @@ static int rxrpc_process_event(struct rxrpc_connection *conn, return 0; case RXRPC_PACKET_TYPE_ABORT: - if (skb_copy_bits(skb, sizeof(struct rxrpc_wire_header), - &wtmp, sizeof(wtmp)) < 0) { - trace_rxrpc_rx_eproto(NULL, sp->hdr.serial, - tracepoint_string("bad_abort")); - return -EPROTO; - } - abort_code = ntohl(wtmp); - _proto("Rx ABORT %%%u { ac=%d }", sp->hdr.serial, abort_code); - conn->error = -ECONNABORTED; - conn->abort_code = abort_code; + conn->abort_code = skb->priority; conn->state = RXRPC_CONN_REMOTELY_ABORTED; set_bit(RXRPC_CONN_DONT_REUSE, &conn->flags); rxrpc_abort_calls(conn, RXRPC_CALL_REMOTELY_ABORTED, sp->hdr.serial); @@ -334,23 +320,23 @@ static int rxrpc_process_event(struct rxrpc_connection *conn, return ret; ret = conn->security->init_connection_security( - conn, conn->params.key->payload.data[0]); + conn, conn->key->payload.data[0]); if (ret < 0) return ret; spin_lock(&conn->bundle->channel_lock); - spin_lock_bh(&conn->state_lock); + spin_lock(&conn->state_lock); if (conn->state == RXRPC_CONN_SERVICE_CHALLENGING) { conn->state = RXRPC_CONN_SERVICE; - spin_unlock_bh(&conn->state_lock); + spin_unlock(&conn->state_lock); for (loop = 0; loop < RXRPC_MAXCALLS; loop++) rxrpc_call_is_secure( rcu_dereference_protected( conn->channels[loop].call, lockdep_is_held(&conn->bundle->channel_lock))); } else { - spin_unlock_bh(&conn->state_lock); + spin_unlock(&conn->state_lock); } spin_unlock(&conn->bundle->channel_lock); @@ -451,7 +437,7 @@ static void rxrpc_do_process_connection(struct rxrpc_connection *conn) /* go through the conn-level event packets, releasing the ref on this * connection that each one has when we've finished with it */ while ((skb = skb_dequeue(&conn->rx_queue))) { - rxrpc_see_skb(skb, rxrpc_skb_seen); + rxrpc_see_skb(skb, rxrpc_skb_see_conn_work); ret = rxrpc_process_event(conn, skb, &abort_code); switch (ret) { case -EPROTO: @@ -463,7 +449,7 @@ static void rxrpc_do_process_connection(struct rxrpc_connection *conn) goto requeue_and_leave; case -ECONNABORTED: default: - rxrpc_free_skb(skb, rxrpc_skb_freed); + rxrpc_free_skb(skb, rxrpc_skb_put_conn_work); break; } } @@ -477,7 +463,7 @@ requeue_and_leave: protocol_error: if (rxrpc_abort_connection(conn, ret, abort_code) < 0) goto requeue_and_leave; - rxrpc_free_skb(skb, rxrpc_skb_freed); + rxrpc_free_skb(skb, rxrpc_skb_put_conn_work); return; } @@ -486,14 +472,70 @@ void rxrpc_process_connection(struct work_struct *work) struct rxrpc_connection *conn = container_of(work, struct rxrpc_connection, processor); - rxrpc_see_connection(conn); + rxrpc_see_connection(conn, rxrpc_conn_see_work); - if (__rxrpc_use_local(conn->params.local)) { + if (__rxrpc_use_local(conn->local, rxrpc_local_use_conn_work)) { rxrpc_do_process_connection(conn); - rxrpc_unuse_local(conn->params.local); + rxrpc_unuse_local(conn->local, rxrpc_local_unuse_conn_work); } +} - rxrpc_put_connection(conn); - _leave(""); - return; +/* + * post connection-level events to the connection + * - this includes challenges, responses, some aborts and call terminal packet + * retransmission. + */ +static void rxrpc_post_packet_to_conn(struct rxrpc_connection *conn, + struct sk_buff *skb) +{ + _enter("%p,%p", conn, skb); + + rxrpc_get_skb(skb, rxrpc_skb_get_conn_work); + skb_queue_tail(&conn->rx_queue, skb); + rxrpc_queue_conn(conn, rxrpc_conn_queue_rx_work); +} + +/* + * Input a connection-level packet. + */ +int rxrpc_input_conn_packet(struct rxrpc_connection *conn, struct sk_buff *skb) +{ + struct rxrpc_skb_priv *sp = rxrpc_skb(skb); + + if (conn->state >= RXRPC_CONN_REMOTELY_ABORTED) { + _leave(" = -ECONNABORTED [%u]", conn->state); + return -ECONNABORTED; + } + + _enter("{%d},{%u,%%%u},", conn->debug_id, sp->hdr.type, sp->hdr.serial); + + switch (sp->hdr.type) { + case RXRPC_PACKET_TYPE_DATA: + case RXRPC_PACKET_TYPE_ACK: + rxrpc_conn_retransmit_call(conn, skb, + sp->hdr.cid & RXRPC_CHANNELMASK); + return 0; + + case RXRPC_PACKET_TYPE_BUSY: + /* Just ignore BUSY packets for now. */ + return 0; + + case RXRPC_PACKET_TYPE_ABORT: + conn->error = -ECONNABORTED; + conn->abort_code = skb->priority; + conn->state = RXRPC_CONN_REMOTELY_ABORTED; + set_bit(RXRPC_CONN_DONT_REUSE, &conn->flags); + rxrpc_abort_calls(conn, RXRPC_CALL_REMOTELY_ABORTED, sp->hdr.serial); + return -ECONNABORTED; + + case RXRPC_PACKET_TYPE_CHALLENGE: + case RXRPC_PACKET_TYPE_RESPONSE: + rxrpc_post_packet_to_conn(conn, skb); + return 0; + + default: + trace_rxrpc_rx_eproto(NULL, sp->hdr.serial, + tracepoint_string("bad_conn_pkt")); + return -EPROTO; + } } diff --git a/net/rxrpc/conn_object.c b/net/rxrpc/conn_object.c index 156bd26daf74..3c8f83dacb2b 100644 --- a/net/rxrpc/conn_object.c +++ b/net/rxrpc/conn_object.c @@ -19,20 +19,23 @@ unsigned int __read_mostly rxrpc_connection_expiry = 10 * 60; unsigned int __read_mostly rxrpc_closed_conn_expiry = 10; -static void rxrpc_destroy_connection(struct rcu_head *); +static void rxrpc_clean_up_connection(struct work_struct *work); +static void rxrpc_set_service_reap_timer(struct rxrpc_net *rxnet, + unsigned long reap_at); static void rxrpc_connection_timer(struct timer_list *timer) { struct rxrpc_connection *conn = container_of(timer, struct rxrpc_connection, timer); - rxrpc_queue_conn(conn); + rxrpc_queue_conn(conn, rxrpc_conn_queue_timer); } /* * allocate a new connection */ -struct rxrpc_connection *rxrpc_alloc_connection(gfp_t gfp) +struct rxrpc_connection *rxrpc_alloc_connection(struct rxrpc_net *rxnet, + gfp_t gfp) { struct rxrpc_connection *conn; @@ -42,10 +45,12 @@ struct rxrpc_connection *rxrpc_alloc_connection(gfp_t gfp) if (conn) { INIT_LIST_HEAD(&conn->cache_link); timer_setup(&conn->timer, &rxrpc_connection_timer, 0); - INIT_WORK(&conn->processor, &rxrpc_process_connection); + INIT_WORK(&conn->processor, rxrpc_process_connection); + INIT_WORK(&conn->destructor, rxrpc_clean_up_connection); INIT_LIST_HEAD(&conn->proc_link); INIT_LIST_HEAD(&conn->link); skb_queue_head_init(&conn->rx_queue); + conn->rxnet = rxnet; conn->security = &rxrpc_no_security; spin_lock_init(&conn->state_lock); conn->debug_id = atomic_inc_return(&rxrpc_debug_id); @@ -67,89 +72,55 @@ struct rxrpc_connection *rxrpc_alloc_connection(gfp_t gfp) * * The caller must be holding the RCU read lock. */ -struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *local, - struct sk_buff *skb, - struct rxrpc_peer **_peer) +struct rxrpc_connection *rxrpc_find_client_connection_rcu(struct rxrpc_local *local, + struct sockaddr_rxrpc *srx, + struct sk_buff *skb) { struct rxrpc_connection *conn; - struct rxrpc_conn_proto k; struct rxrpc_skb_priv *sp = rxrpc_skb(skb); - struct sockaddr_rxrpc srx; struct rxrpc_peer *peer; _enter(",%x", sp->hdr.cid & RXRPC_CIDMASK); - if (rxrpc_extract_addr_from_skb(&srx, skb) < 0) - goto not_found; - - if (srx.transport.family != local->srx.transport.family && - (srx.transport.family == AF_INET && - local->srx.transport.family != AF_INET6)) { - pr_warn_ratelimited("AF_RXRPC: Protocol mismatch %u not %u\n", - srx.transport.family, - local->srx.transport.family); + /* Look up client connections by connection ID alone as their IDs are + * unique for this machine. + */ + conn = idr_find(&rxrpc_client_conn_ids, sp->hdr.cid >> RXRPC_CIDSHIFT); + if (!conn || refcount_read(&conn->ref) == 0) { + _debug("no conn"); goto not_found; } - k.epoch = sp->hdr.epoch; - k.cid = sp->hdr.cid & RXRPC_CIDMASK; - - if (rxrpc_to_server(sp)) { - /* We need to look up service connections by the full protocol - * parameter set. We look up the peer first as an intermediate - * step and then the connection from the peer's tree. - */ - peer = rxrpc_lookup_peer_rcu(local, &srx); - if (!peer) - goto not_found; - *_peer = peer; - conn = rxrpc_find_service_conn_rcu(peer, skb); - if (!conn || refcount_read(&conn->ref) == 0) - goto not_found; - _leave(" = %p", conn); - return conn; - } else { - /* Look up client connections by connection ID alone as their - * IDs are unique for this machine. - */ - conn = idr_find(&rxrpc_client_conn_ids, - sp->hdr.cid >> RXRPC_CIDSHIFT); - if (!conn || refcount_read(&conn->ref) == 0) { - _debug("no conn"); - goto not_found; - } + if (conn->proto.epoch != sp->hdr.epoch || + conn->local != local) + goto not_found; - if (conn->proto.epoch != k.epoch || - conn->params.local != local) + peer = conn->peer; + switch (srx->transport.family) { + case AF_INET: + if (peer->srx.transport.sin.sin_port != + srx->transport.sin.sin_port || + peer->srx.transport.sin.sin_addr.s_addr != + srx->transport.sin.sin_addr.s_addr) goto not_found; - - peer = conn->params.peer; - switch (srx.transport.family) { - case AF_INET: - if (peer->srx.transport.sin.sin_port != - srx.transport.sin.sin_port || - peer->srx.transport.sin.sin_addr.s_addr != - srx.transport.sin.sin_addr.s_addr) - goto not_found; - break; + break; #ifdef CONFIG_AF_RXRPC_IPV6 - case AF_INET6: - if (peer->srx.transport.sin6.sin6_port != - srx.transport.sin6.sin6_port || - memcmp(&peer->srx.transport.sin6.sin6_addr, - &srx.transport.sin6.sin6_addr, - sizeof(struct in6_addr)) != 0) - goto not_found; - break; + case AF_INET6: + if (peer->srx.transport.sin6.sin6_port != + srx->transport.sin6.sin6_port || + memcmp(&peer->srx.transport.sin6.sin6_addr, + &srx->transport.sin6.sin6_addr, + sizeof(struct in6_addr)) != 0) + goto not_found; + break; #endif - default: - BUG(); - } - - _leave(" = %p", conn); - return conn; + default: + BUG(); } + _leave(" = %p", conn); + return conn; + not_found: _leave(" = NULL"); return NULL; @@ -210,9 +181,9 @@ void rxrpc_disconnect_call(struct rxrpc_call *call) call->peer->cong_ssthresh = call->cong_ssthresh; if (!hlist_unhashed(&call->error_link)) { - spin_lock_bh(&call->peer->lock); - hlist_del_rcu(&call->error_link); - spin_unlock_bh(&call->peer->lock); + spin_lock(&call->peer->lock); + hlist_del_init(&call->error_link); + spin_unlock(&call->peer->lock); } if (rxrpc_is_client_call(call)) @@ -224,79 +195,45 @@ void rxrpc_disconnect_call(struct rxrpc_call *call) set_bit(RXRPC_CALL_DISCONNECTED, &call->flags); conn->idle_timestamp = jiffies; -} - -/* - * Kill off a connection. - */ -void rxrpc_kill_connection(struct rxrpc_connection *conn) -{ - struct rxrpc_net *rxnet = conn->params.local->rxnet; - - ASSERT(!rcu_access_pointer(conn->channels[0].call) && - !rcu_access_pointer(conn->channels[1].call) && - !rcu_access_pointer(conn->channels[2].call) && - !rcu_access_pointer(conn->channels[3].call)); - ASSERT(list_empty(&conn->cache_link)); - - write_lock(&rxnet->conn_lock); - list_del_init(&conn->proc_link); - write_unlock(&rxnet->conn_lock); - - /* Drain the Rx queue. Note that even though we've unpublished, an - * incoming packet could still be being added to our Rx queue, so we - * will need to drain it again in the RCU cleanup handler. - */ - rxrpc_purge_queue(&conn->rx_queue); - - /* Leave final destruction to RCU. The connection processor work item - * must carry a ref on the connection to prevent us getting here whilst - * it is queued or running. - */ - call_rcu(&conn->rcu, rxrpc_destroy_connection); + if (atomic_dec_and_test(&conn->active)) + rxrpc_set_service_reap_timer(conn->rxnet, + jiffies + rxrpc_connection_expiry); } /* * Queue a connection's work processor, getting a ref to pass to the work * queue. */ -bool rxrpc_queue_conn(struct rxrpc_connection *conn) +void rxrpc_queue_conn(struct rxrpc_connection *conn, enum rxrpc_conn_trace why) { - const void *here = __builtin_return_address(0); - int r; - - if (!__refcount_inc_not_zero(&conn->ref, &r)) - return false; - if (rxrpc_queue_work(&conn->processor)) - trace_rxrpc_conn(conn->debug_id, rxrpc_conn_queued, r + 1, here); - else - rxrpc_put_connection(conn); - return true; + if (atomic_read(&conn->active) >= 0 && + rxrpc_queue_work(&conn->processor)) + rxrpc_see_connection(conn, why); } /* * Note the re-emergence of a connection. */ -void rxrpc_see_connection(struct rxrpc_connection *conn) +void rxrpc_see_connection(struct rxrpc_connection *conn, + enum rxrpc_conn_trace why) { - const void *here = __builtin_return_address(0); if (conn) { - int n = refcount_read(&conn->ref); + int r = refcount_read(&conn->ref); - trace_rxrpc_conn(conn->debug_id, rxrpc_conn_seen, n, here); + trace_rxrpc_conn(conn->debug_id, r, why); } } /* * Get a ref on a connection. */ -struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *conn) +struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *conn, + enum rxrpc_conn_trace why) { - const void *here = __builtin_return_address(0); int r; __refcount_inc(&conn->ref, &r); - trace_rxrpc_conn(conn->debug_id, rxrpc_conn_got, r, here); + trace_rxrpc_conn(conn->debug_id, r + 1, why); return conn; } @@ -304,14 +241,14 @@ struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *conn) * Try to get a ref on a connection. */ struct rxrpc_connection * -rxrpc_get_connection_maybe(struct rxrpc_connection *conn) +rxrpc_get_connection_maybe(struct rxrpc_connection *conn, + enum rxrpc_conn_trace why) { - const void *here = __builtin_return_address(0); int r; if (conn) { if (__refcount_inc_not_zero(&conn->ref, &r)) - trace_rxrpc_conn(conn->debug_id, rxrpc_conn_got, r + 1, here); + trace_rxrpc_conn(conn->debug_id, r + 1, why); else conn = NULL; } @@ -329,49 +266,95 @@ static void rxrpc_set_service_reap_timer(struct rxrpc_net *rxnet, } /* - * Release a service connection + * destroy a virtual connection */ -void rxrpc_put_service_conn(struct rxrpc_connection *conn) +static void rxrpc_rcu_free_connection(struct rcu_head *rcu) { - const void *here = __builtin_return_address(0); - unsigned int debug_id = conn->debug_id; - int r; + struct rxrpc_connection *conn = + container_of(rcu, struct rxrpc_connection, rcu); + struct rxrpc_net *rxnet = conn->rxnet; - __refcount_dec(&conn->ref, &r); - trace_rxrpc_conn(debug_id, rxrpc_conn_put_service, r - 1, here); - if (r - 1 == 1) - rxrpc_set_service_reap_timer(conn->params.local->rxnet, - jiffies + rxrpc_connection_expiry); + _enter("{%d,u=%d}", conn->debug_id, refcount_read(&conn->ref)); + + trace_rxrpc_conn(conn->debug_id, refcount_read(&conn->ref), + rxrpc_conn_free); + kfree(conn); + + if (atomic_dec_and_test(&rxnet->nr_conns)) + wake_up_var(&rxnet->nr_conns); } /* - * destroy a virtual connection + * Clean up a dead connection. */ -static void rxrpc_destroy_connection(struct rcu_head *rcu) +static void rxrpc_clean_up_connection(struct work_struct *work) { struct rxrpc_connection *conn = - container_of(rcu, struct rxrpc_connection, rcu); + container_of(work, struct rxrpc_connection, destructor); + struct rxrpc_net *rxnet = conn->rxnet; - _enter("{%d,u=%d}", conn->debug_id, refcount_read(&conn->ref)); + ASSERT(!rcu_access_pointer(conn->channels[0].call) && + !rcu_access_pointer(conn->channels[1].call) && + !rcu_access_pointer(conn->channels[2].call) && + !rcu_access_pointer(conn->channels[3].call)); + ASSERT(list_empty(&conn->cache_link)); - ASSERTCMP(refcount_read(&conn->ref), ==, 0); + del_timer_sync(&conn->timer); + cancel_work_sync(&conn->processor); /* Processing may restart the timer */ + del_timer_sync(&conn->timer); - _net("DESTROY CONN %d", conn->debug_id); + write_lock(&rxnet->conn_lock); + list_del_init(&conn->proc_link); + write_unlock(&rxnet->conn_lock); - del_timer_sync(&conn->timer); rxrpc_purge_queue(&conn->rx_queue); + rxrpc_kill_client_conn(conn); + conn->security->clear(conn); - key_put(conn->params.key); - rxrpc_put_bundle(conn->bundle); - rxrpc_put_peer(conn->params.peer); + key_put(conn->key); + rxrpc_put_bundle(conn->bundle, rxrpc_bundle_put_conn); + rxrpc_put_peer(conn->peer, rxrpc_peer_put_conn); + rxrpc_put_local(conn->local, rxrpc_local_put_kill_conn); + + /* Drain the Rx queue. Note that even though we've unpublished, an + * incoming packet could still be being added to our Rx queue, so we + * will need to drain it again in the RCU cleanup handler. + */ + rxrpc_purge_queue(&conn->rx_queue); - if (atomic_dec_and_test(&conn->params.local->rxnet->nr_conns)) - wake_up_var(&conn->params.local->rxnet->nr_conns); - rxrpc_put_local(conn->params.local); + call_rcu(&conn->rcu, rxrpc_rcu_free_connection); +} - kfree(conn); - _leave(""); +/* + * Drop a ref on a connection. + */ +void rxrpc_put_connection(struct rxrpc_connection *conn, + enum rxrpc_conn_trace why) +{ + unsigned int debug_id; + bool dead; + int r; + + if (!conn) + return; + + debug_id = conn->debug_id; + dead = __refcount_dec_and_test(&conn->ref, &r); + trace_rxrpc_conn(debug_id, r - 1, why); + if (dead) { + del_timer(&conn->timer); + cancel_work(&conn->processor); + + if (in_softirq() || work_busy(&conn->processor) || + timer_pending(&conn->timer)) + /* Can't use the rxrpc workqueue as we need to cancel/flush + * something that may be running/waiting there. + */ + schedule_work(&conn->destructor); + else + rxrpc_clean_up_connection(&conn->destructor); + } } /* @@ -383,6 +366,7 @@ void rxrpc_service_connection_reaper(struct work_struct *work) struct rxrpc_net *rxnet = container_of(work, struct rxrpc_net, service_conn_reaper); unsigned long expire_at, earliest, idle_timestamp, now; + int active; LIST_HEAD(graveyard); @@ -393,20 +377,20 @@ void rxrpc_service_connection_reaper(struct work_struct *work) write_lock(&rxnet->conn_lock); list_for_each_entry_safe(conn, _p, &rxnet->service_conns, link) { - ASSERTCMP(refcount_read(&conn->ref), >, 0); - if (likely(refcount_read(&conn->ref) > 1)) + ASSERTCMP(atomic_read(&conn->active), >=, 0); + if (likely(atomic_read(&conn->active) > 0)) continue; if (conn->state == RXRPC_CONN_SERVICE_PREALLOC) continue; - if (rxnet->live && !conn->params.local->dead) { + if (rxnet->live && !conn->local->dead) { idle_timestamp = READ_ONCE(conn->idle_timestamp); expire_at = idle_timestamp + rxrpc_connection_expiry * HZ; - if (conn->params.local->service_closed) + if (conn->local->service_closed) expire_at = idle_timestamp + rxrpc_closed_conn_expiry * HZ; - _debug("reap CONN %d { u=%d,t=%ld }", - conn->debug_id, refcount_read(&conn->ref), + _debug("reap CONN %d { a=%d,t=%ld }", + conn->debug_id, atomic_read(&conn->active), (long)expire_at - (long)now); if (time_before(now, expire_at)) { @@ -416,12 +400,13 @@ void rxrpc_service_connection_reaper(struct work_struct *work) } } - /* The usage count sits at 1 whilst the object is unused on the - * list; we reduce that to 0 to make the object unavailable. + /* The activity count sits at 0 whilst the conn is unused on + * the list; we reduce that to -1 to make the conn unavailable. */ - if (!refcount_dec_if_one(&conn->ref)) + active = 0; + if (!atomic_try_cmpxchg(&conn->active, &active, -1)) continue; - trace_rxrpc_conn(conn->debug_id, rxrpc_conn_reap_service, 0, NULL); + rxrpc_see_connection(conn, rxrpc_conn_see_reap_service); if (rxrpc_conn_is_client(conn)) BUG(); @@ -443,8 +428,8 @@ void rxrpc_service_connection_reaper(struct work_struct *work) link); list_del_init(&conn->link); - ASSERTCMP(refcount_read(&conn->ref), ==, 0); - rxrpc_kill_connection(conn); + ASSERTCMP(atomic_read(&conn->active), ==, -1); + rxrpc_put_connection(conn, rxrpc_conn_put_service_reaped); } _leave(""); diff --git a/net/rxrpc/conn_service.c b/net/rxrpc/conn_service.c index 6e6aa02c6f9e..2a55a88b2a5b 100644 --- a/net/rxrpc/conn_service.c +++ b/net/rxrpc/conn_service.c @@ -73,7 +73,7 @@ static void rxrpc_publish_service_conn(struct rxrpc_peer *peer, struct rxrpc_conn_proto k = conn->proto; struct rb_node **pp, *parent; - write_seqlock_bh(&peer->service_conn_lock); + write_seqlock(&peer->service_conn_lock); pp = &peer->service_conns.rb_node; parent = NULL; @@ -94,14 +94,14 @@ static void rxrpc_publish_service_conn(struct rxrpc_peer *peer, rb_insert_color(&conn->service_node, &peer->service_conns); conn_published: set_bit(RXRPC_CONN_IN_SERVICE_CONNS, &conn->flags); - write_sequnlock_bh(&peer->service_conn_lock); + write_sequnlock(&peer->service_conn_lock); _leave(" = %d [new]", conn->debug_id); return; found_extant_conn: if (refcount_read(&cursor->ref) == 0) goto replace_old_connection; - write_sequnlock_bh(&peer->service_conn_lock); + write_sequnlock(&peer->service_conn_lock); /* We should not be able to get here. rxrpc_incoming_connection() is * called in a non-reentrant context, so there can't be a race to * insert a new connection. @@ -125,7 +125,7 @@ replace_old_connection: struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *rxnet, gfp_t gfp) { - struct rxrpc_connection *conn = rxrpc_alloc_connection(gfp); + struct rxrpc_connection *conn = rxrpc_alloc_connection(rxnet, gfp); if (conn) { /* We maintain an extra ref on the connection whilst it is on @@ -133,7 +133,8 @@ struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *rxn */ conn->state = RXRPC_CONN_SERVICE_PREALLOC; refcount_set(&conn->ref, 2); - conn->bundle = rxrpc_get_bundle(&rxrpc_service_dummy_bundle); + conn->bundle = rxrpc_get_bundle(&rxrpc_service_dummy_bundle, + rxrpc_bundle_get_service_conn); atomic_inc(&rxnet->nr_conns); write_lock(&rxnet->conn_lock); @@ -141,9 +142,7 @@ struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *rxn list_add_tail(&conn->proc_link, &rxnet->conn_proc_list); write_unlock(&rxnet->conn_lock); - trace_rxrpc_conn(conn->debug_id, rxrpc_conn_new_service, - refcount_read(&conn->ref), - __builtin_return_address(0)); + rxrpc_see_connection(conn, rxrpc_conn_new_service); } return conn; @@ -164,7 +163,7 @@ void rxrpc_new_incoming_connection(struct rxrpc_sock *rx, conn->proto.epoch = sp->hdr.epoch; conn->proto.cid = sp->hdr.cid & RXRPC_CIDMASK; - conn->params.service_id = sp->hdr.serviceId; + conn->orig_service_id = sp->hdr.serviceId; conn->service_id = sp->hdr.serviceId; conn->security_ix = sp->hdr.securityIndex; conn->out_clientflag = 0; @@ -182,10 +181,10 @@ void rxrpc_new_incoming_connection(struct rxrpc_sock *rx, conn->service_id == rx->service_upgrade.from) conn->service_id = rx->service_upgrade.to; - /* Make the connection a target for incoming packets. */ - rxrpc_publish_service_conn(conn->params.peer, conn); + atomic_set(&conn->active, 1); - _net("CONNECTION new %d {%x}", conn->debug_id, conn->proto.cid); + /* Make the connection a target for incoming packets. */ + rxrpc_publish_service_conn(conn->peer, conn); } /* @@ -194,10 +193,10 @@ void rxrpc_new_incoming_connection(struct rxrpc_sock *rx, */ void rxrpc_unpublish_service_conn(struct rxrpc_connection *conn) { - struct rxrpc_peer *peer = conn->params.peer; + struct rxrpc_peer *peer = conn->peer; - write_seqlock_bh(&peer->service_conn_lock); + write_seqlock(&peer->service_conn_lock); if (test_and_clear_bit(RXRPC_CONN_IN_SERVICE_CONNS, &conn->flags)) rb_erase(&conn->service_node, &peer->service_conns); - write_sequnlock_bh(&peer->service_conn_lock); + write_sequnlock(&peer->service_conn_lock); } diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c index bdf70b81addc..d0e20e946e48 100644 --- a/net/rxrpc/input.c +++ b/net/rxrpc/input.c @@ -1,7 +1,7 @@ // SPDX-License-Identifier: GPL-2.0-or-later -/* RxRPC packet reception +/* Processing of received RxRPC packets * - * Copyright (C) 2007, 2016 Red Hat, Inc. All Rights Reserved. + * Copyright (C) 2020 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) */ @@ -12,10 +12,8 @@ static void rxrpc_proto_abort(const char *why, struct rxrpc_call *call, rxrpc_seq_t seq) { - if (rxrpc_abort_call(why, call, seq, RX_PROTOCOL_ERROR, -EBADMSG)) { - set_bit(RXRPC_CALL_EV_ABORT, &call->events); - rxrpc_queue_call(call); - } + if (rxrpc_abort_call(why, call, seq, RX_PROTOCOL_ERROR, -EBADMSG)) + rxrpc_send_abort_packet(call); } /* @@ -58,25 +56,6 @@ static void rxrpc_congestion_management(struct rxrpc_call *call, summary->cumulative_acks = cumulative_acks; summary->dup_acks = call->cong_dup_acks; - /* If we haven't transmitted anything for >1RTT, we should reset the - * congestion management state. - */ - if ((call->cong_mode == RXRPC_CALL_SLOW_START || - call->cong_mode == RXRPC_CALL_CONGEST_AVOIDANCE) && - ktime_before(ktime_add_us(call->tx_last_sent, - call->peer->srtt_us >> 3), - ktime_get_real()) - ) { - change = rxrpc_cong_idle_reset; - summary->mode = RXRPC_CALL_SLOW_START; - if (RXRPC_TX_SMSS > 2190) - summary->cwnd = 2; - else if (RXRPC_TX_SMSS > 1095) - summary->cwnd = 3; - else - summary->cwnd = 4; - } - switch (call->cong_mode) { case RXRPC_CALL_SLOW_START: if (summary->saw_nacks) @@ -174,8 +153,8 @@ out_no_clear_ca: call->cong_cwnd = cwnd; call->cong_cumul_acks = cumulative_acks; trace_rxrpc_congest(call, summary, acked_serial, change); - if (resend && !test_and_set_bit(RXRPC_CALL_EV_RESEND, &call->events)) - rxrpc_queue_call(call); + if (resend) + rxrpc_resend(call, skb); return; packet_loss_detected: @@ -197,6 +176,33 @@ send_extra_data: } /* + * Degrade the congestion window if we haven't transmitted a packet for >1RTT. + */ +void rxrpc_congestion_degrade(struct rxrpc_call *call) +{ + ktime_t rtt, now; + + if (call->cong_mode != RXRPC_CALL_SLOW_START && + call->cong_mode != RXRPC_CALL_CONGEST_AVOIDANCE) + return; + if (call->state == RXRPC_CALL_CLIENT_AWAIT_REPLY) + return; + + rtt = ns_to_ktime(call->peer->srtt_us * (1000 / 8)); + now = ktime_get_real(); + if (!ktime_before(ktime_add(call->tx_last_sent, rtt), now)) + return; + + trace_rxrpc_reset_cwnd(call, now); + rxrpc_inc_stat(call->rxnet, stat_tx_data_cwnd_reset); + call->tx_last_sent = now; + call->cong_mode = RXRPC_CALL_SLOW_START; + call->cong_ssthresh = max_t(unsigned int, call->cong_ssthresh, + call->cong_cwnd * 3 / 4); + call->cong_cwnd = max_t(unsigned int, call->cong_cwnd / 2, RXRPC_MIN_CWND); +} + +/* * Apply a hard ACK by advancing the Tx window. */ static bool rxrpc_rotate_tx_window(struct rxrpc_call *call, rxrpc_seq_t to, @@ -338,7 +344,8 @@ static void rxrpc_input_queue_data(struct rxrpc_call *call, struct sk_buff *skb, /* * Process a DATA packet. */ -static void rxrpc_input_data_one(struct rxrpc_call *call, struct sk_buff *skb) +static void rxrpc_input_data_one(struct rxrpc_call *call, struct sk_buff *skb, + bool *_notify) { struct rxrpc_skb_priv *sp = rxrpc_skb(skb); struct sk_buff *oos; @@ -361,7 +368,7 @@ static void rxrpc_input_data_one(struct rxrpc_call *call, struct sk_buff *skb) if (test_and_set_bit(RXRPC_CALL_RX_LAST, &call->flags) && seq + 1 != wtop) { rxrpc_proto_abort("LSN", call, seq); - goto err_free; + return; } } else { if (test_bit(RXRPC_CALL_RX_LAST, &call->flags) && @@ -369,7 +376,7 @@ static void rxrpc_input_data_one(struct rxrpc_call *call, struct sk_buff *skb) pr_warn("Packet beyond last: c=%x q=%x window=%x-%x wlimit=%x\n", call->debug_id, seq, window, wtop, wlimit); rxrpc_proto_abort("LSA", call, seq); - goto err_free; + return; } } @@ -397,14 +404,18 @@ static void rxrpc_input_data_one(struct rxrpc_call *call, struct sk_buff *skb) /* Send an immediate ACK if we fill in a hole */ else if (!skb_queue_empty(&call->rx_oos_queue)) ack_reason = RXRPC_ACK_DELAY; + else + atomic_inc_return(&call->ackr_nr_unacked); window++; if (after(window, wtop)) wtop = window; + rxrpc_get_skb(skb, rxrpc_skb_get_to_recvmsg); + spin_lock(&call->recvmsg_queue.lock); rxrpc_input_queue_data(call, skb, window, wtop, rxrpc_receive_queue); - skb = NULL; + *_notify = true; while ((oos = skb_peek(&call->rx_oos_queue))) { struct rxrpc_skb_priv *osp = rxrpc_skb(oos); @@ -456,36 +467,26 @@ static void rxrpc_input_data_one(struct rxrpc_call *call, struct sk_buff *skb) struct rxrpc_skb_priv *osp = rxrpc_skb(oos); if (after(osp->hdr.seq, seq)) { + rxrpc_get_skb(skb, rxrpc_skb_get_to_recvmsg_oos); __skb_queue_before(&call->rx_oos_queue, oos, skb); goto oos_queued; } } + rxrpc_get_skb(skb, rxrpc_skb_get_to_recvmsg_oos); __skb_queue_tail(&call->rx_oos_queue, skb); oos_queued: trace_rxrpc_receive(call, last ? rxrpc_receive_oos_last : rxrpc_receive_oos, sp->hdr.serial, sp->hdr.seq); - skb = NULL; } send_ack: - if (ack_reason < 0 && - atomic_inc_return(&call->ackr_nr_unacked) > 2 && - test_and_set_bit(RXRPC_CALL_IDLE_ACK_PENDING, &call->flags)) { - ack_reason = RXRPC_ACK_IDLE; - } else if (ack_reason >= 0) { - set_bit(RXRPC_CALL_IDLE_ACK_PENDING, &call->flags); - } - if (ack_reason >= 0) rxrpc_send_ACK(call, ack_reason, serial, rxrpc_propose_ack_input_data); else rxrpc_propose_delay_ACK(call, serial, rxrpc_propose_ack_input_data); - -err_free: - rxrpc_free_skb(skb, rxrpc_skb_freed); } /* @@ -498,6 +499,7 @@ static bool rxrpc_input_split_jumbo(struct rxrpc_call *call, struct sk_buff *skb struct sk_buff *jskb; unsigned int offset = sizeof(struct rxrpc_wire_header); unsigned int len = skb->len - offset; + bool notify = false; while (sp->hdr.flags & RXRPC_JUMBO_PACKET) { if (len < RXRPC_JUMBO_SUBPKTLEN) @@ -508,16 +510,17 @@ static bool rxrpc_input_split_jumbo(struct rxrpc_call *call, struct sk_buff *skb &jhdr, sizeof(jhdr)) < 0) goto protocol_error; - jskb = skb_clone(skb, GFP_ATOMIC); + jskb = skb_clone(skb, GFP_NOFS); if (!jskb) { kdebug("couldn't clone"); return false; } - rxrpc_new_skb(jskb, rxrpc_skb_cloned_jumbo); + rxrpc_new_skb(jskb, rxrpc_skb_new_jumbo_subpacket); jsp = rxrpc_skb(jskb); jsp->offset = offset; jsp->len = RXRPC_JUMBO_DATALEN; - rxrpc_input_data_one(call, jskb); + rxrpc_input_data_one(call, jskb, ¬ify); + rxrpc_free_skb(jskb, rxrpc_skb_put_jumbo_subpacket); sp->hdr.flags = jhdr.flags; sp->hdr._rsvd = ntohs(jhdr._rsvd); @@ -529,7 +532,11 @@ static bool rxrpc_input_split_jumbo(struct rxrpc_call *call, struct sk_buff *skb sp->offset = offset; sp->len = len; - rxrpc_input_data_one(call, skb); + rxrpc_input_data_one(call, skb, ¬ify); + if (notify) { + trace_rxrpc_notify_socket(call->debug_id, sp->hdr.serial); + rxrpc_notify_socket(call); + } return true; protocol_error: @@ -551,32 +558,9 @@ static void rxrpc_input_data(struct rxrpc_call *call, struct sk_buff *skb) atomic64_read(&call->ackr_window), call->rx_highest_seq, skb->len, seq0); - _proto("Rx DATA %%%u { #%u f=%02x }", - sp->hdr.serial, seq0, sp->hdr.flags); - state = READ_ONCE(call->state); - if (state >= RXRPC_CALL_COMPLETE) { - rxrpc_free_skb(skb, rxrpc_skb_freed); + if (state >= RXRPC_CALL_COMPLETE) return; - } - - /* Unshare the packet so that it can be modified for in-place - * decryption. - */ - if (sp->hdr.securityIndex != 0) { - struct sk_buff *nskb = skb_unshare(skb, GFP_ATOMIC); - if (!nskb) { - rxrpc_eaten_skb(skb, rxrpc_skb_unshared_nomem); - return; - } - - if (nskb != skb) { - rxrpc_eaten_skb(skb, rxrpc_skb_received); - skb = nskb; - rxrpc_new_skb(skb, rxrpc_skb_unshared); - sp = rxrpc_skb(skb); - } - } if (state == RXRPC_CALL_SERVER_RECV_REQUEST) { unsigned long timo = READ_ONCE(call->next_req_timo); @@ -591,28 +575,23 @@ static void rxrpc_input_data(struct rxrpc_call *call, struct sk_buff *skb) } } - spin_lock(&call->input_lock); - /* Received data implicitly ACKs all of the request packets we sent * when we're acting as a client. */ if ((state == RXRPC_CALL_CLIENT_SEND_REQUEST || state == RXRPC_CALL_CLIENT_AWAIT_REPLY) && !rxrpc_receiving_reply(call)) - goto out; + goto out_notify; if (!rxrpc_input_split_jumbo(call, skb)) { rxrpc_proto_abort("VLD", call, sp->hdr.seq); - goto out; + goto out_notify; } skb = NULL; -out: +out_notify: trace_rxrpc_notify_socket(call->debug_id, serial); rxrpc_notify_socket(call); - - spin_unlock(&call->input_lock); - rxrpc_free_skb(skb, rxrpc_skb_freed); _leave(" [queued]"); } @@ -671,32 +650,6 @@ static void rxrpc_complete_rtt_probe(struct rxrpc_call *call, } /* - * Process the response to a ping that we sent to find out if we lost an ACK. - * - * If we got back a ping response that indicates a lower tx_top than what we - * had at the time of the ping transmission, we adjudge all the DATA packets - * sent between the response tx_top and the ping-time tx_top to have been lost. - */ -static void rxrpc_input_check_for_lost_ack(struct rxrpc_call *call) -{ - if (after(call->acks_lost_top, call->acks_prev_seq) && - !test_and_set_bit(RXRPC_CALL_EV_RESEND, &call->events)) - rxrpc_queue_call(call); -} - -/* - * Process a ping response. - */ -static void rxrpc_input_ping_response(struct rxrpc_call *call, - ktime_t resp_time, - rxrpc_serial_t acked_serial, - rxrpc_serial_t ack_serial) -{ - if (acked_serial == call->acks_lost_ping) - rxrpc_input_check_for_lost_ack(call); -} - -/* * Process the extra information that may be appended to an ACK packet */ static void rxrpc_input_ackinfo(struct rxrpc_call *call, struct sk_buff *skb, @@ -708,11 +661,6 @@ static void rxrpc_input_ackinfo(struct rxrpc_call *call, struct sk_buff *skb, bool wake = false; u32 rwind = ntohl(ackinfo->rwind); - _proto("Rx ACK %%%u Info { rx=%u max=%u rwin=%u jm=%u }", - sp->hdr.serial, - ntohl(ackinfo->rxMTU), ntohl(ackinfo->maxMTU), - rwind, ntohl(ackinfo->jumbo_max)); - if (rwind > RXRPC_TX_MAX_WINDOW) rwind = RXRPC_TX_MAX_WINDOW; if (call->tx_winsize != rwind) { @@ -729,11 +677,10 @@ static void rxrpc_input_ackinfo(struct rxrpc_call *call, struct sk_buff *skb, peer = call->peer; if (mtu < peer->maxdata) { - spin_lock_bh(&peer->lock); + spin_lock(&peer->lock); peer->maxdata = mtu; peer->mtu = mtu + peer->hdrsize; - spin_unlock_bh(&peer->lock); - _net("Net MTU %u (maxdata %u)", peer->mtu, peer->maxdata); + spin_unlock(&peer->lock); } if (wake) @@ -810,7 +757,6 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb) struct rxrpc_ackpacket ack; struct rxrpc_skb_priv *sp = rxrpc_skb(skb); struct rxrpc_ackinfo info; - struct sk_buff *skb_old = NULL, *skb_put = skb; rxrpc_serial_t ack_serial, acked_serial; rxrpc_seq_t first_soft_ack, hard_ack, prev_pkt; int nr_acks, offset, ioffset; @@ -818,10 +764,8 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb) _enter(""); offset = sizeof(struct rxrpc_wire_header); - if (skb_copy_bits(skb, offset, &ack, sizeof(ack)) < 0) { - rxrpc_proto_abort("XAK", call, 0); - goto out_not_locked; - } + if (skb_copy_bits(skb, offset, &ack, sizeof(ack)) < 0) + return rxrpc_proto_abort("XAK", call, 0); offset += sizeof(ack); ack_serial = sp->hdr.serial; @@ -855,7 +799,6 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb) } if (ack.reason == RXRPC_ACK_PING) { - _proto("Rx ACK %%%u PING Request", ack_serial); rxrpc_send_ACK(call, RXRPC_ACK_PING_RESPONSE, ack_serial, rxrpc_propose_ack_respond_to_ping); } else if (sp->hdr.flags & RXRPC_REQUEST_ACK) { @@ -895,41 +838,25 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb) trace_rxrpc_rx_discard_ack(call->debug_id, ack_serial, first_soft_ack, call->acks_first_seq, prev_pkt, call->acks_prev_seq); - goto out_not_locked; + return; } info.rxMTU = 0; ioffset = offset + nr_acks + 3; if (skb->len >= ioffset + sizeof(info) && - skb_copy_bits(skb, ioffset, &info, sizeof(info)) < 0) { - rxrpc_proto_abort("XAI", call, 0); - goto out_not_locked; - } + skb_copy_bits(skb, ioffset, &info, sizeof(info)) < 0) + return rxrpc_proto_abort("XAI", call, 0); if (nr_acks > 0) skb_condense(skb); - spin_lock(&call->input_lock); - - /* Discard any out-of-order or duplicate ACKs (inside lock). */ - if (!rxrpc_is_ack_valid(call, first_soft_ack, prev_pkt)) { - trace_rxrpc_rx_discard_ack(call->debug_id, ack_serial, - first_soft_ack, call->acks_first_seq, - prev_pkt, call->acks_prev_seq); - goto out; - } call->acks_latest_ts = skb->tstamp; - call->acks_first_seq = first_soft_ack; call->acks_prev_seq = prev_pkt; switch (ack.reason) { case RXRPC_ACK_PING: break; - case RXRPC_ACK_PING_RESPONSE: - rxrpc_input_ping_response(call, skb->tstamp, acked_serial, - ack_serial); - fallthrough; default: if (after(acked_serial, call->acks_highest_serial)) call->acks_highest_serial = acked_serial; @@ -940,10 +867,8 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb) if (info.rxMTU) rxrpc_input_ackinfo(call, skb, &info); - if (first_soft_ack == 0) { - rxrpc_proto_abort("AK0", call, 0); - goto out; - } + if (first_soft_ack == 0) + return rxrpc_proto_abort("AK0", call, 0); /* Ignore ACKs unless we are or have just been transmitting. */ switch (READ_ONCE(call->state)) { @@ -953,45 +878,27 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb) case RXRPC_CALL_SERVER_AWAIT_ACK: break; default: - goto out; + return; } if (before(hard_ack, call->acks_hard_ack) || - after(hard_ack, call->tx_top)) { - rxrpc_proto_abort("AKW", call, 0); - goto out; - } - if (nr_acks > call->tx_top - hard_ack) { - rxrpc_proto_abort("AKN", call, 0); - goto out; - } + after(hard_ack, call->tx_top)) + return rxrpc_proto_abort("AKW", call, 0); + if (nr_acks > call->tx_top - hard_ack) + return rxrpc_proto_abort("AKN", call, 0); if (after(hard_ack, call->acks_hard_ack)) { if (rxrpc_rotate_tx_window(call, hard_ack, &summary)) { rxrpc_end_tx_phase(call, false, "ETA"); - goto out; + return; } } if (nr_acks > 0) { - if (offset > (int)skb->len - nr_acks) { - rxrpc_proto_abort("XSA", call, 0); - goto out; - } - - spin_lock(&call->acks_ack_lock); - skb_old = call->acks_soft_tbl; - call->acks_soft_tbl = skb; - spin_unlock(&call->acks_ack_lock); - + if (offset > (int)skb->len - nr_acks) + return rxrpc_proto_abort("XSA", call, 0); rxrpc_input_soft_acks(call, skb->data + offset, first_soft_ack, nr_acks, &summary); - skb_put = NULL; - } else if (call->acks_soft_tbl) { - spin_lock(&call->acks_ack_lock); - skb_old = call->acks_soft_tbl; - call->acks_soft_tbl = NULL; - spin_unlock(&call->acks_ack_lock); } if (test_bit(RXRPC_CALL_TX_LAST, &call->flags) && @@ -1001,11 +908,6 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb) rxrpc_propose_ack_ping_for_lost_reply); rxrpc_congestion_management(call, skb, &summary, acked_serial); -out: - spin_unlock(&call->input_lock); -out_not_locked: - rxrpc_free_skb(skb_put, rxrpc_skb_freed); - rxrpc_free_skb(skb_old, rxrpc_skb_freed); } /* @@ -1014,16 +916,9 @@ out_not_locked: static void rxrpc_input_ackall(struct rxrpc_call *call, struct sk_buff *skb) { struct rxrpc_ack_summary summary = { 0 }; - struct rxrpc_skb_priv *sp = rxrpc_skb(skb); - - _proto("Rx ACKALL %%%u", sp->hdr.serial); - - spin_lock(&call->input_lock); if (rxrpc_rotate_tx_window(call, call->tx_top, &summary)) rxrpc_end_tx_phase(call, false, "ETL"); - - spin_unlock(&call->input_lock); } /* @@ -1032,35 +927,30 @@ static void rxrpc_input_ackall(struct rxrpc_call *call, struct sk_buff *skb) static void rxrpc_input_abort(struct rxrpc_call *call, struct sk_buff *skb) { struct rxrpc_skb_priv *sp = rxrpc_skb(skb); - __be32 wtmp; - u32 abort_code = RX_CALL_DEAD; - - _enter(""); - - if (skb->len >= 4 && - skb_copy_bits(skb, sizeof(struct rxrpc_wire_header), - &wtmp, sizeof(wtmp)) >= 0) - abort_code = ntohl(wtmp); - trace_rxrpc_rx_abort(call, sp->hdr.serial, abort_code); - - _proto("Rx ABORT %%%u { %x }", sp->hdr.serial, abort_code); + trace_rxrpc_rx_abort(call, sp->hdr.serial, skb->priority); rxrpc_set_call_completion(call, RXRPC_CALL_REMOTELY_ABORTED, - abort_code, -ECONNABORTED); + skb->priority, -ECONNABORTED); } /* * Process an incoming call packet. */ -static void rxrpc_input_call_packet(struct rxrpc_call *call, - struct sk_buff *skb) +void rxrpc_input_call_packet(struct rxrpc_call *call, struct sk_buff *skb) { struct rxrpc_skb_priv *sp = rxrpc_skb(skb); unsigned long timo; _enter("%p,%p", call, skb); + if (sp->hdr.serviceId != call->dest_srx.srx_service) + call->dest_srx.srx_service = sp->hdr.serviceId; + if ((int)sp->hdr.serial - (int)call->rx_serial > 0) + call->rx_serial = sp->hdr.serial; + if (!test_bit(RXRPC_CALL_RX_HEARD, &call->flags)) + set_bit(RXRPC_CALL_RX_HEARD, &call->flags); + timo = READ_ONCE(call->next_rx_timo); if (timo) { unsigned long now = jiffies, expect_rx_by; @@ -1074,15 +964,13 @@ static void rxrpc_input_call_packet(struct rxrpc_call *call, switch (sp->hdr.type) { case RXRPC_PACKET_TYPE_DATA: rxrpc_input_data(call, skb); - goto no_free; + break; case RXRPC_PACKET_TYPE_ACK: rxrpc_input_ack(call, skb); - goto no_free; + break; case RXRPC_PACKET_TYPE_BUSY: - _proto("Rx BUSY %%%u", sp->hdr.serial); - /* Just ignore BUSY packets from the server; the retry and * lifespan timers will take care of business. BUSY packets * from the client don't make sense. @@ -1100,10 +988,6 @@ static void rxrpc_input_call_packet(struct rxrpc_call *call, default: break; } - - rxrpc_free_skb(skb, rxrpc_skb_freed); -no_free: - _leave(""); } /* @@ -1112,10 +996,10 @@ no_free: * * TODO: If callNumber > call_id + 1, renegotiate security. */ -static void rxrpc_input_implicit_end_call(struct rxrpc_sock *rx, - struct rxrpc_connection *conn, - struct rxrpc_call *call) +void rxrpc_implicit_end_call(struct rxrpc_call *call, struct sk_buff *skb) { + struct rxrpc_connection *conn = call->conn; + switch (READ_ONCE(call->state)) { case RXRPC_CALL_SERVER_AWAIT_ACK: rxrpc_call_completed(call); @@ -1123,360 +1007,15 @@ static void rxrpc_input_implicit_end_call(struct rxrpc_sock *rx, case RXRPC_CALL_COMPLETE: break; default: - if (rxrpc_abort_call("IMP", call, 0, RX_CALL_DEAD, -ESHUTDOWN)) { - set_bit(RXRPC_CALL_EV_ABORT, &call->events); - rxrpc_queue_call(call); - } + if (rxrpc_abort_call("IMP", call, 0, RX_CALL_DEAD, -ESHUTDOWN)) + rxrpc_send_abort_packet(call); trace_rxrpc_improper_term(call); break; } - spin_lock(&rx->incoming_lock); - __rxrpc_disconnect_call(conn, call); - spin_unlock(&rx->incoming_lock); -} - -/* - * post connection-level events to the connection - * - this includes challenges, responses, some aborts and call terminal packet - * retransmission. - */ -static void rxrpc_post_packet_to_conn(struct rxrpc_connection *conn, - struct sk_buff *skb) -{ - _enter("%p,%p", conn, skb); - - skb_queue_tail(&conn->rx_queue, skb); - rxrpc_queue_conn(conn); -} - -/* - * post endpoint-level events to the local endpoint - * - this includes debug and version messages - */ -static void rxrpc_post_packet_to_local(struct rxrpc_local *local, - struct sk_buff *skb) -{ - _enter("%p,%p", local, skb); - - if (rxrpc_get_local_maybe(local)) { - skb_queue_tail(&local->event_queue, skb); - rxrpc_queue_local(local); - } else { - rxrpc_free_skb(skb, rxrpc_skb_freed); - } -} - -/* - * put a packet up for transport-level abort - */ -static void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb) -{ - if (rxrpc_get_local_maybe(local)) { - skb_queue_tail(&local->reject_queue, skb); - rxrpc_queue_local(local); - } else { - rxrpc_free_skb(skb, rxrpc_skb_freed); - } -} - -/* - * Extract the wire header from a packet and translate the byte order. - */ -static noinline -int rxrpc_extract_header(struct rxrpc_skb_priv *sp, struct sk_buff *skb) -{ - struct rxrpc_wire_header whdr; - - /* dig out the RxRPC connection details */ - if (skb_copy_bits(skb, 0, &whdr, sizeof(whdr)) < 0) { - trace_rxrpc_rx_eproto(NULL, sp->hdr.serial, - tracepoint_string("bad_hdr")); - return -EBADMSG; - } - - memset(sp, 0, sizeof(*sp)); - sp->hdr.epoch = ntohl(whdr.epoch); - sp->hdr.cid = ntohl(whdr.cid); - sp->hdr.callNumber = ntohl(whdr.callNumber); - sp->hdr.seq = ntohl(whdr.seq); - sp->hdr.serial = ntohl(whdr.serial); - sp->hdr.flags = whdr.flags; - sp->hdr.type = whdr.type; - sp->hdr.userStatus = whdr.userStatus; - sp->hdr.securityIndex = whdr.securityIndex; - sp->hdr._rsvd = ntohs(whdr._rsvd); - sp->hdr.serviceId = ntohs(whdr.serviceId); - return 0; -} - -/* - * handle data received on the local endpoint - * - may be called in interrupt context - * - * [!] Note that as this is called from the encap_rcv hook, the socket is not - * held locked by the caller and nothing prevents sk_user_data on the UDP from - * being cleared in the middle of processing this function. - * - * Called with the RCU read lock held from the IP layer via UDP. - */ -int rxrpc_input_packet(struct sock *udp_sk, struct sk_buff *skb) -{ - struct rxrpc_local *local = rcu_dereference_sk_user_data(udp_sk); - struct rxrpc_connection *conn; - struct rxrpc_channel *chan; - struct rxrpc_call *call = NULL; - struct rxrpc_skb_priv *sp; - struct rxrpc_peer *peer = NULL; - struct rxrpc_sock *rx = NULL; - unsigned int channel; - - _enter("%p", udp_sk); - - if (unlikely(!local)) { - kfree_skb(skb); - return 0; - } - if (skb->tstamp == 0) - skb->tstamp = ktime_get_real(); - - rxrpc_new_skb(skb, rxrpc_skb_received); - - skb_pull(skb, sizeof(struct udphdr)); - - /* The UDP protocol already released all skb resources; - * we are free to add our own data there. - */ - sp = rxrpc_skb(skb); - - /* dig out the RxRPC connection details */ - if (rxrpc_extract_header(sp, skb) < 0) - goto bad_message; - - if (IS_ENABLED(CONFIG_AF_RXRPC_INJECT_LOSS)) { - static int lose; - if ((lose++ & 7) == 7) { - trace_rxrpc_rx_lose(sp); - rxrpc_free_skb(skb, rxrpc_skb_lost); - return 0; - } - } - - if (skb->tstamp == 0) - skb->tstamp = ktime_get_real(); - trace_rxrpc_rx_packet(sp); - - switch (sp->hdr.type) { - case RXRPC_PACKET_TYPE_VERSION: - if (rxrpc_to_client(sp)) - goto discard; - rxrpc_post_packet_to_local(local, skb); - goto out; - - case RXRPC_PACKET_TYPE_BUSY: - if (rxrpc_to_server(sp)) - goto discard; - fallthrough; - case RXRPC_PACKET_TYPE_ACK: - case RXRPC_PACKET_TYPE_ACKALL: - if (sp->hdr.callNumber == 0) - goto bad_message; - fallthrough; - case RXRPC_PACKET_TYPE_ABORT: - break; - - case RXRPC_PACKET_TYPE_DATA: - if (sp->hdr.callNumber == 0 || - sp->hdr.seq == 0) - goto bad_message; - - /* Unshare the packet so that it can be modified for in-place - * decryption. - */ - if (sp->hdr.securityIndex != 0) { - struct sk_buff *nskb = skb_unshare(skb, GFP_ATOMIC); - if (!nskb) { - rxrpc_eaten_skb(skb, rxrpc_skb_unshared_nomem); - goto out; - } - - if (nskb != skb) { - rxrpc_eaten_skb(skb, rxrpc_skb_received); - skb = nskb; - rxrpc_new_skb(skb, rxrpc_skb_unshared); - sp = rxrpc_skb(skb); - } - } - break; - - case RXRPC_PACKET_TYPE_CHALLENGE: - if (rxrpc_to_server(sp)) - goto discard; - break; - case RXRPC_PACKET_TYPE_RESPONSE: - if (rxrpc_to_client(sp)) - goto discard; - break; - - /* Packet types 9-11 should just be ignored. */ - case RXRPC_PACKET_TYPE_PARAMS: - case RXRPC_PACKET_TYPE_10: - case RXRPC_PACKET_TYPE_11: - goto discard; - - default: - _proto("Rx Bad Packet Type %u", sp->hdr.type); - goto bad_message; - } - - if (sp->hdr.serviceId == 0) - goto bad_message; - - if (rxrpc_to_server(sp)) { - /* Weed out packets to services we're not offering. Packets - * that would begin a call are explicitly rejected and the rest - * are just discarded. - */ - rx = rcu_dereference(local->service); - if (!rx || (sp->hdr.serviceId != rx->srx.srx_service && - sp->hdr.serviceId != rx->second_service)) { - if (sp->hdr.type == RXRPC_PACKET_TYPE_DATA && - sp->hdr.seq == 1) - goto unsupported_service; - goto discard; - } - } - - conn = rxrpc_find_connection_rcu(local, skb, &peer); - if (conn) { - if (sp->hdr.securityIndex != conn->security_ix) - goto wrong_security; - - if (sp->hdr.serviceId != conn->service_id) { - int old_id; - - if (!test_bit(RXRPC_CONN_PROBING_FOR_UPGRADE, &conn->flags)) - goto reupgrade; - old_id = cmpxchg(&conn->service_id, conn->params.service_id, - sp->hdr.serviceId); - - if (old_id != conn->params.service_id && - old_id != sp->hdr.serviceId) - goto reupgrade; - } - - if (sp->hdr.callNumber == 0) { - /* Connection-level packet */ - _debug("CONN %p {%d}", conn, conn->debug_id); - rxrpc_post_packet_to_conn(conn, skb); - goto out; - } - - if ((int)sp->hdr.serial - (int)conn->hi_serial > 0) - conn->hi_serial = sp->hdr.serial; - - /* Call-bound packets are routed by connection channel. */ - channel = sp->hdr.cid & RXRPC_CHANNELMASK; - chan = &conn->channels[channel]; - - /* Ignore really old calls */ - if (sp->hdr.callNumber < chan->last_call) - goto discard; - - if (sp->hdr.callNumber == chan->last_call) { - if (chan->call || - sp->hdr.type == RXRPC_PACKET_TYPE_ABORT) - goto discard; - - /* For the previous service call, if completed - * successfully, we discard all further packets. - */ - if (rxrpc_conn_is_service(conn) && - chan->last_type == RXRPC_PACKET_TYPE_ACK) - goto discard; - - /* But otherwise we need to retransmit the final packet - * from data cached in the connection record. - */ - if (sp->hdr.type == RXRPC_PACKET_TYPE_DATA) - trace_rxrpc_rx_data(chan->call_debug_id, - sp->hdr.seq, - sp->hdr.serial, - sp->hdr.flags); - rxrpc_post_packet_to_conn(conn, skb); - goto out; - } - - call = rcu_dereference(chan->call); - - if (sp->hdr.callNumber > chan->call_id) { - if (rxrpc_to_client(sp)) - goto reject_packet; - if (call) - rxrpc_input_implicit_end_call(rx, conn, call); - call = NULL; - } - - if (call) { - if (sp->hdr.serviceId != call->service_id) - call->service_id = sp->hdr.serviceId; - if ((int)sp->hdr.serial - (int)call->rx_serial > 0) - call->rx_serial = sp->hdr.serial; - if (!test_bit(RXRPC_CALL_RX_HEARD, &call->flags)) - set_bit(RXRPC_CALL_RX_HEARD, &call->flags); - } - } - - if (!call || refcount_read(&call->ref) == 0) { - if (rxrpc_to_client(sp) || - sp->hdr.type != RXRPC_PACKET_TYPE_DATA) - goto bad_message; - if (sp->hdr.seq != 1) - goto discard; - call = rxrpc_new_incoming_call(local, rx, skb); - if (!call) - goto reject_packet; - } - - /* Process a call packet; this either discards or passes on the ref - * elsewhere. - */ - rxrpc_input_call_packet(call, skb); - goto out; + rxrpc_input_call_event(call, skb); -discard: - rxrpc_free_skb(skb, rxrpc_skb_freed); -out: - trace_rxrpc_rx_done(0, 0); - return 0; - -wrong_security: - trace_rxrpc_abort(0, "SEC", sp->hdr.cid, sp->hdr.callNumber, sp->hdr.seq, - RXKADINCONSISTENCY, EBADMSG); - skb->priority = RXKADINCONSISTENCY; - goto post_abort; - -unsupported_service: - trace_rxrpc_abort(0, "INV", sp->hdr.cid, sp->hdr.callNumber, sp->hdr.seq, - RX_INVALID_OPERATION, EOPNOTSUPP); - skb->priority = RX_INVALID_OPERATION; - goto post_abort; - -reupgrade: - trace_rxrpc_abort(0, "UPG", sp->hdr.cid, sp->hdr.callNumber, sp->hdr.seq, - RX_PROTOCOL_ERROR, EBADMSG); - goto protocol_error; - -bad_message: - trace_rxrpc_abort(0, "BAD", sp->hdr.cid, sp->hdr.callNumber, sp->hdr.seq, - RX_PROTOCOL_ERROR, EBADMSG); -protocol_error: - skb->priority = RX_PROTOCOL_ERROR; -post_abort: - skb->mark = RXRPC_SKB_MARK_REJECT_ABORT; -reject_packet: - trace_rxrpc_rx_done(skb->mark, skb->priority); - rxrpc_reject_packet(local, skb); - _leave(" [badmsg]"); - return 0; + spin_lock(&conn->bundle->channel_lock); + __rxrpc_disconnect_call(conn, call); + spin_unlock(&conn->bundle->channel_lock); } diff --git a/net/rxrpc/io_thread.c b/net/rxrpc/io_thread.c new file mode 100644 index 000000000000..d83ae3193032 --- /dev/null +++ b/net/rxrpc/io_thread.c @@ -0,0 +1,496 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* RxRPC packet reception + * + * Copyright (C) 2007, 2016, 2022 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include "ar-internal.h" + +static int rxrpc_input_packet_on_conn(struct rxrpc_connection *conn, + struct sockaddr_rxrpc *peer_srx, + struct sk_buff *skb); + +/* + * handle data received on the local endpoint + * - may be called in interrupt context + * + * [!] Note that as this is called from the encap_rcv hook, the socket is not + * held locked by the caller and nothing prevents sk_user_data on the UDP from + * being cleared in the middle of processing this function. + * + * Called with the RCU read lock held from the IP layer via UDP. + */ +int rxrpc_encap_rcv(struct sock *udp_sk, struct sk_buff *skb) +{ + struct rxrpc_local *local = rcu_dereference_sk_user_data(udp_sk); + + if (unlikely(!local)) { + kfree_skb(skb); + return 0; + } + if (skb->tstamp == 0) + skb->tstamp = ktime_get_real(); + + skb->mark = RXRPC_SKB_MARK_PACKET; + rxrpc_new_skb(skb, rxrpc_skb_new_encap_rcv); + skb_queue_tail(&local->rx_queue, skb); + rxrpc_wake_up_io_thread(local); + return 0; +} + +/* + * Handle an error received on the local endpoint. + */ +void rxrpc_error_report(struct sock *sk) +{ + struct rxrpc_local *local; + struct sk_buff *skb; + + rcu_read_lock(); + local = rcu_dereference_sk_user_data(sk); + if (unlikely(!local)) { + rcu_read_unlock(); + return; + } + + while ((skb = skb_dequeue(&sk->sk_error_queue))) { + skb->mark = RXRPC_SKB_MARK_ERROR; + rxrpc_new_skb(skb, rxrpc_skb_new_error_report); + skb_queue_tail(&local->rx_queue, skb); + } + + rxrpc_wake_up_io_thread(local); + rcu_read_unlock(); +} + +/* + * Process event packets targeted at a local endpoint. + */ +static void rxrpc_input_version(struct rxrpc_local *local, struct sk_buff *skb) +{ + struct rxrpc_skb_priv *sp = rxrpc_skb(skb); + char v; + + _enter(""); + + rxrpc_see_skb(skb, rxrpc_skb_see_version); + if (skb_copy_bits(skb, sizeof(struct rxrpc_wire_header), &v, 1) >= 0) { + if (v == 0) + rxrpc_send_version_request(local, &sp->hdr, skb); + } +} + +/* + * Extract the wire header from a packet and translate the byte order. + */ +static noinline +int rxrpc_extract_header(struct rxrpc_skb_priv *sp, struct sk_buff *skb) +{ + struct rxrpc_wire_header whdr; + + /* dig out the RxRPC connection details */ + if (skb_copy_bits(skb, 0, &whdr, sizeof(whdr)) < 0) { + trace_rxrpc_rx_eproto(NULL, sp->hdr.serial, + tracepoint_string("bad_hdr")); + return -EBADMSG; + } + + memset(sp, 0, sizeof(*sp)); + sp->hdr.epoch = ntohl(whdr.epoch); + sp->hdr.cid = ntohl(whdr.cid); + sp->hdr.callNumber = ntohl(whdr.callNumber); + sp->hdr.seq = ntohl(whdr.seq); + sp->hdr.serial = ntohl(whdr.serial); + sp->hdr.flags = whdr.flags; + sp->hdr.type = whdr.type; + sp->hdr.userStatus = whdr.userStatus; + sp->hdr.securityIndex = whdr.securityIndex; + sp->hdr._rsvd = ntohs(whdr._rsvd); + sp->hdr.serviceId = ntohs(whdr.serviceId); + return 0; +} + +/* + * Extract the abort code from an ABORT packet and stash it in skb->priority. + */ +static bool rxrpc_extract_abort(struct sk_buff *skb) +{ + __be32 wtmp; + + if (skb_copy_bits(skb, sizeof(struct rxrpc_wire_header), + &wtmp, sizeof(wtmp)) < 0) + return false; + skb->priority = ntohl(wtmp); + return true; +} + +/* + * Process packets received on the local endpoint + */ +static int rxrpc_input_packet(struct rxrpc_local *local, struct sk_buff **_skb) +{ + struct rxrpc_connection *conn; + struct sockaddr_rxrpc peer_srx; + struct rxrpc_skb_priv *sp; + struct rxrpc_peer *peer = NULL; + struct sk_buff *skb = *_skb; + int ret = 0; + + skb_pull(skb, sizeof(struct udphdr)); + + sp = rxrpc_skb(skb); + + /* dig out the RxRPC connection details */ + if (rxrpc_extract_header(sp, skb) < 0) + goto bad_message; + + if (IS_ENABLED(CONFIG_AF_RXRPC_INJECT_LOSS)) { + static int lose; + if ((lose++ & 7) == 7) { + trace_rxrpc_rx_lose(sp); + return 0; + } + } + + trace_rxrpc_rx_packet(sp); + + switch (sp->hdr.type) { + case RXRPC_PACKET_TYPE_VERSION: + if (rxrpc_to_client(sp)) + return 0; + rxrpc_input_version(local, skb); + return 0; + + case RXRPC_PACKET_TYPE_BUSY: + if (rxrpc_to_server(sp)) + return 0; + fallthrough; + case RXRPC_PACKET_TYPE_ACK: + case RXRPC_PACKET_TYPE_ACKALL: + if (sp->hdr.callNumber == 0) + goto bad_message; + break; + case RXRPC_PACKET_TYPE_ABORT: + if (!rxrpc_extract_abort(skb)) + return 0; /* Just discard if malformed */ + break; + + case RXRPC_PACKET_TYPE_DATA: + if (sp->hdr.callNumber == 0 || + sp->hdr.seq == 0) + goto bad_message; + + /* Unshare the packet so that it can be modified for in-place + * decryption. + */ + if (sp->hdr.securityIndex != 0) { + skb = skb_unshare(skb, GFP_ATOMIC); + if (!skb) { + rxrpc_eaten_skb(*_skb, rxrpc_skb_eaten_by_unshare_nomem); + *_skb = NULL; + return 0; + } + + if (skb != *_skb) { + rxrpc_eaten_skb(*_skb, rxrpc_skb_eaten_by_unshare); + *_skb = skb; + rxrpc_new_skb(skb, rxrpc_skb_new_unshared); + sp = rxrpc_skb(skb); + } + } + break; + + case RXRPC_PACKET_TYPE_CHALLENGE: + if (rxrpc_to_server(sp)) + return 0; + break; + case RXRPC_PACKET_TYPE_RESPONSE: + if (rxrpc_to_client(sp)) + return 0; + break; + + /* Packet types 9-11 should just be ignored. */ + case RXRPC_PACKET_TYPE_PARAMS: + case RXRPC_PACKET_TYPE_10: + case RXRPC_PACKET_TYPE_11: + return 0; + + default: + goto bad_message; + } + + if (sp->hdr.serviceId == 0) + goto bad_message; + + if (WARN_ON_ONCE(rxrpc_extract_addr_from_skb(&peer_srx, skb) < 0)) + return true; /* Unsupported address type - discard. */ + + if (peer_srx.transport.family != local->srx.transport.family && + (peer_srx.transport.family == AF_INET && + local->srx.transport.family != AF_INET6)) { + pr_warn_ratelimited("AF_RXRPC: Protocol mismatch %u not %u\n", + peer_srx.transport.family, + local->srx.transport.family); + return true; /* Wrong address type - discard. */ + } + + if (rxrpc_to_client(sp)) { + rcu_read_lock(); + conn = rxrpc_find_client_connection_rcu(local, &peer_srx, skb); + conn = rxrpc_get_connection_maybe(conn, rxrpc_conn_get_call_input); + rcu_read_unlock(); + if (!conn) { + trace_rxrpc_abort(0, "NCC", sp->hdr.cid, + sp->hdr.callNumber, sp->hdr.seq, + RXKADINCONSISTENCY, EBADMSG); + goto protocol_error; + } + + ret = rxrpc_input_packet_on_conn(conn, &peer_srx, skb); + rxrpc_put_connection(conn, rxrpc_conn_put_call_input); + return ret; + } + + /* We need to look up service connections by the full protocol + * parameter set. We look up the peer first as an intermediate step + * and then the connection from the peer's tree. + */ + rcu_read_lock(); + + peer = rxrpc_lookup_peer_rcu(local, &peer_srx); + if (!peer) { + rcu_read_unlock(); + return rxrpc_new_incoming_call(local, NULL, NULL, &peer_srx, skb); + } + + conn = rxrpc_find_service_conn_rcu(peer, skb); + conn = rxrpc_get_connection_maybe(conn, rxrpc_conn_get_call_input); + if (conn) { + rcu_read_unlock(); + ret = rxrpc_input_packet_on_conn(conn, &peer_srx, skb); + rxrpc_put_connection(conn, rxrpc_conn_put_call_input); + return ret; + } + + peer = rxrpc_get_peer_maybe(peer, rxrpc_peer_get_input); + rcu_read_unlock(); + + ret = rxrpc_new_incoming_call(local, peer, NULL, &peer_srx, skb); + rxrpc_put_peer(peer, rxrpc_peer_put_input); + if (ret < 0) + goto reject_packet; + return 0; + +bad_message: + trace_rxrpc_abort(0, "BAD", sp->hdr.cid, sp->hdr.callNumber, sp->hdr.seq, + RX_PROTOCOL_ERROR, EBADMSG); +protocol_error: + skb->priority = RX_PROTOCOL_ERROR; + skb->mark = RXRPC_SKB_MARK_REJECT_ABORT; +reject_packet: + rxrpc_reject_packet(local, skb); + return ret; +} + +/* + * Deal with a packet that's associated with an extant connection. + */ +static int rxrpc_input_packet_on_conn(struct rxrpc_connection *conn, + struct sockaddr_rxrpc *peer_srx, + struct sk_buff *skb) +{ + struct rxrpc_skb_priv *sp = rxrpc_skb(skb); + struct rxrpc_channel *chan; + struct rxrpc_call *call = NULL; + unsigned int channel; + + if (sp->hdr.securityIndex != conn->security_ix) + goto wrong_security; + + if (sp->hdr.serviceId != conn->service_id) { + int old_id; + + if (!test_bit(RXRPC_CONN_PROBING_FOR_UPGRADE, &conn->flags)) + goto reupgrade; + old_id = cmpxchg(&conn->service_id, conn->orig_service_id, + sp->hdr.serviceId); + + if (old_id != conn->orig_service_id && + old_id != sp->hdr.serviceId) + goto reupgrade; + } + + if (after(sp->hdr.serial, conn->hi_serial)) + conn->hi_serial = sp->hdr.serial; + + /* It's a connection-level packet if the call number is 0. */ + if (sp->hdr.callNumber == 0) + return rxrpc_input_conn_packet(conn, skb); + + /* Call-bound packets are routed by connection channel. */ + channel = sp->hdr.cid & RXRPC_CHANNELMASK; + chan = &conn->channels[channel]; + + /* Ignore really old calls */ + if (sp->hdr.callNumber < chan->last_call) + return 0; + + if (sp->hdr.callNumber == chan->last_call) { + if (chan->call || + sp->hdr.type == RXRPC_PACKET_TYPE_ABORT) + return 0; + + /* For the previous service call, if completed successfully, we + * discard all further packets. + */ + if (rxrpc_conn_is_service(conn) && + chan->last_type == RXRPC_PACKET_TYPE_ACK) + return 0; + + /* But otherwise we need to retransmit the final packet from + * data cached in the connection record. + */ + if (sp->hdr.type == RXRPC_PACKET_TYPE_DATA) + trace_rxrpc_rx_data(chan->call_debug_id, + sp->hdr.seq, + sp->hdr.serial, + sp->hdr.flags); + rxrpc_input_conn_packet(conn, skb); + return 0; + } + + rcu_read_lock(); + call = rxrpc_try_get_call(rcu_dereference(chan->call), + rxrpc_call_get_input); + rcu_read_unlock(); + + if (sp->hdr.callNumber > chan->call_id) { + if (rxrpc_to_client(sp)) { + rxrpc_put_call(call, rxrpc_call_put_input); + goto reject_packet; + } + + if (call) { + rxrpc_implicit_end_call(call, skb); + rxrpc_put_call(call, rxrpc_call_put_input); + call = NULL; + } + } + + if (!call) { + if (rxrpc_to_client(sp)) + goto bad_message; + if (rxrpc_new_incoming_call(conn->local, conn->peer, conn, + peer_srx, skb)) + return 0; + goto reject_packet; + } + + rxrpc_input_call_event(call, skb); + rxrpc_put_call(call, rxrpc_call_put_input); + return 0; + +wrong_security: + trace_rxrpc_abort(0, "SEC", sp->hdr.cid, sp->hdr.callNumber, sp->hdr.seq, + RXKADINCONSISTENCY, EBADMSG); + skb->priority = RXKADINCONSISTENCY; + goto post_abort; + +reupgrade: + trace_rxrpc_abort(0, "UPG", sp->hdr.cid, sp->hdr.callNumber, sp->hdr.seq, + RX_PROTOCOL_ERROR, EBADMSG); + goto protocol_error; + +bad_message: + trace_rxrpc_abort(0, "BAD", sp->hdr.cid, sp->hdr.callNumber, sp->hdr.seq, + RX_PROTOCOL_ERROR, EBADMSG); +protocol_error: + skb->priority = RX_PROTOCOL_ERROR; +post_abort: + skb->mark = RXRPC_SKB_MARK_REJECT_ABORT; +reject_packet: + rxrpc_reject_packet(conn->local, skb); + return 0; +} + +/* + * I/O and event handling thread. + */ +int rxrpc_io_thread(void *data) +{ + struct sk_buff_head rx_queue; + struct rxrpc_local *local = data; + struct rxrpc_call *call; + struct sk_buff *skb; + + skb_queue_head_init(&rx_queue); + + set_user_nice(current, MIN_NICE); + + for (;;) { + rxrpc_inc_stat(local->rxnet, stat_io_loop); + + /* Deal with calls that want immediate attention. */ + if ((call = list_first_entry_or_null(&local->call_attend_q, + struct rxrpc_call, + attend_link))) { + spin_lock_bh(&local->lock); + list_del_init(&call->attend_link); + spin_unlock_bh(&local->lock); + + trace_rxrpc_call_poked(call); + rxrpc_input_call_event(call, NULL); + rxrpc_put_call(call, rxrpc_call_put_poke); + continue; + } + + /* Process received packets and errors. */ + if ((skb = __skb_dequeue(&rx_queue))) { + switch (skb->mark) { + case RXRPC_SKB_MARK_PACKET: + skb->priority = 0; + rxrpc_input_packet(local, &skb); + trace_rxrpc_rx_done(skb->mark, skb->priority); + rxrpc_free_skb(skb, rxrpc_skb_put_input); + break; + case RXRPC_SKB_MARK_ERROR: + rxrpc_input_error(local, skb); + rxrpc_free_skb(skb, rxrpc_skb_put_error_report); + break; + default: + WARN_ON_ONCE(1); + rxrpc_free_skb(skb, rxrpc_skb_put_unknown); + break; + } + continue; + } + + if (!skb_queue_empty(&local->rx_queue)) { + spin_lock_irq(&local->rx_queue.lock); + skb_queue_splice_tail_init(&local->rx_queue, &rx_queue); + spin_unlock_irq(&local->rx_queue.lock); + continue; + } + + set_current_state(TASK_INTERRUPTIBLE); + if (!skb_queue_empty(&local->rx_queue) || + !list_empty(&local->call_attend_q)) { + __set_current_state(TASK_RUNNING); + continue; + } + + if (kthread_should_stop()) + break; + schedule(); + } + + __set_current_state(TASK_RUNNING); + rxrpc_see_local(local, rxrpc_local_stop); + rxrpc_destroy_local(local); + local->io_thread = NULL; + rxrpc_see_local(local, rxrpc_local_stopped); + return 0; +} diff --git a/net/rxrpc/key.c b/net/rxrpc/key.c index 8d2073e0e3da..8d53aded09c4 100644 --- a/net/rxrpc/key.c +++ b/net/rxrpc/key.c @@ -513,7 +513,7 @@ int rxrpc_get_server_data_key(struct rxrpc_connection *conn, if (ret < 0) goto error; - conn->params.key = key; + conn->key = key; _leave(" = 0 [%d]", key_serial(key)); return 0; @@ -602,7 +602,8 @@ static long rxrpc_read(const struct key *key, } _debug("token[%u]: toksize=%u", ntoks, toksize); - ASSERTCMP(toksize, <=, AFSTOKEN_LENGTH_MAX); + if (WARN_ON(toksize > AFSTOKEN_LENGTH_MAX)) + return -EIO; toksizes[ntoks++] = toksize; size += toksize + 4; /* each token has a length word */ @@ -679,8 +680,9 @@ static long rxrpc_read(const struct key *key, return -ENOPKG; } - ASSERTCMP((unsigned long)xdr - (unsigned long)oldxdr, ==, - toksize); + if (WARN_ON((unsigned long)xdr - (unsigned long)oldxdr == + toksize)) + return -EIO; } #undef ENCODE_STR @@ -688,8 +690,10 @@ static long rxrpc_read(const struct key *key, #undef ENCODE64 #undef ENCODE - ASSERTCMP(tok, ==, ntoks); - ASSERTCMP((char __user *) xdr - buffer, ==, size); + if (WARN_ON(tok != ntoks)) + return -EIO; + if (WARN_ON((unsigned long)xdr - (unsigned long)buffer != size)) + return -EIO; _leave(" = %zu", size); return size; } diff --git a/net/rxrpc/local_event.c b/net/rxrpc/local_event.c index 19e929c7c38b..5e69ea6b233d 100644 --- a/net/rxrpc/local_event.c +++ b/net/rxrpc/local_event.c @@ -21,9 +21,9 @@ static const char rxrpc_version_string[65] = "linux-" UTS_RELEASE " AF_RXRPC"; /* * Reply to a version request */ -static void rxrpc_send_version_request(struct rxrpc_local *local, - struct rxrpc_host_header *hdr, - struct sk_buff *skb) +void rxrpc_send_version_request(struct rxrpc_local *local, + struct rxrpc_host_header *hdr, + struct sk_buff *skb) { struct rxrpc_wire_header whdr; struct rxrpc_skb_priv *sp = rxrpc_skb(skb); @@ -63,8 +63,6 @@ static void rxrpc_send_version_request(struct rxrpc_local *local, len = iov[0].iov_len + iov[1].iov_len; - _proto("Tx VERSION (reply)"); - ret = kernel_sendmsg(local->socket, &msg, iov, 2, len); if (ret < 0) trace_rxrpc_tx_fail(local->debug_id, 0, ret, @@ -75,41 +73,3 @@ static void rxrpc_send_version_request(struct rxrpc_local *local, _leave(""); } - -/* - * Process event packets targeted at a local endpoint. - */ -void rxrpc_process_local_events(struct rxrpc_local *local) -{ - struct sk_buff *skb; - char v; - - _enter(""); - - skb = skb_dequeue(&local->event_queue); - if (skb) { - struct rxrpc_skb_priv *sp = rxrpc_skb(skb); - - rxrpc_see_skb(skb, rxrpc_skb_seen); - _debug("{%d},{%u}", local->debug_id, sp->hdr.type); - - switch (sp->hdr.type) { - case RXRPC_PACKET_TYPE_VERSION: - if (skb_copy_bits(skb, sizeof(struct rxrpc_wire_header), - &v, 1) < 0) - return; - _proto("Rx VERSION { %02x }", v); - if (v == 0) - rxrpc_send_version_request(local, &sp->hdr, skb); - break; - - default: - /* Just ignore anything we don't understand */ - break; - } - - rxrpc_free_skb(skb, rxrpc_skb_freed); - } - - _leave(""); -} diff --git a/net/rxrpc/local_object.c b/net/rxrpc/local_object.c index a943fdf91e24..44222923c0d1 100644 --- a/net/rxrpc/local_object.c +++ b/net/rxrpc/local_object.c @@ -20,7 +20,6 @@ #include <net/af_rxrpc.h> #include "ar-internal.h" -static void rxrpc_local_processor(struct work_struct *); static void rxrpc_local_rcu(struct rcu_head *); /* @@ -97,12 +96,9 @@ static struct rxrpc_local *rxrpc_alloc_local(struct rxrpc_net *rxnet, atomic_set(&local->active_users, 1); local->rxnet = rxnet; INIT_HLIST_NODE(&local->link); - INIT_WORK(&local->processor, rxrpc_local_processor); - INIT_LIST_HEAD(&local->ack_tx_queue); - spin_lock_init(&local->ack_tx_lock); init_rwsem(&local->defrag_sem); - skb_queue_head_init(&local->reject_queue); - skb_queue_head_init(&local->event_queue); + skb_queue_head_init(&local->rx_queue); + INIT_LIST_HEAD(&local->call_attend_q); local->client_bundles = RB_ROOT; spin_lock_init(&local->client_bundles_lock); spin_lock_init(&local->lock); @@ -110,7 +106,7 @@ static struct rxrpc_local *rxrpc_alloc_local(struct rxrpc_net *rxnet, local->debug_id = atomic_inc_return(&rxrpc_debug_id); memcpy(&local->srx, srx, sizeof(*srx)); local->srx.srx_service = 0; - trace_rxrpc_local(local->debug_id, rxrpc_local_new, 1, NULL); + trace_rxrpc_local(local->debug_id, rxrpc_local_new, 1, 1); } _leave(" = %p", local); @@ -126,6 +122,7 @@ static int rxrpc_open_socket(struct rxrpc_local *local, struct net *net) struct udp_tunnel_sock_cfg tuncfg = {NULL}; struct sockaddr_rxrpc *srx = &local->srx; struct udp_port_cfg udp_conf = {0}; + struct task_struct *io_thread; struct sock *usk; int ret; @@ -152,7 +149,7 @@ static int rxrpc_open_socket(struct rxrpc_local *local, struct net *net) } tuncfg.encap_type = UDP_ENCAP_RXRPC; - tuncfg.encap_rcv = rxrpc_input_packet; + tuncfg.encap_rcv = rxrpc_encap_rcv; tuncfg.encap_err_rcv = rxrpc_encap_err_rcv; tuncfg.sk_user_data = local; setup_udp_tunnel_sock(net, local->socket, &tuncfg); @@ -185,8 +182,23 @@ static int rxrpc_open_socket(struct rxrpc_local *local, struct net *net) BUG(); } + io_thread = kthread_run(rxrpc_io_thread, local, + "krxrpcio/%u", ntohs(udp_conf.local_udp_port)); + if (IS_ERR(io_thread)) { + ret = PTR_ERR(io_thread); + goto error_sock; + } + + local->io_thread = io_thread; _leave(" = 0"); return 0; + +error_sock: + kernel_sock_shutdown(local->socket, SHUT_RDWR); + local->socket->sk->sk_user_data = NULL; + sock_release(local->socket); + local->socket = NULL; + return ret; } /* @@ -198,7 +210,6 @@ struct rxrpc_local *rxrpc_lookup_local(struct net *net, struct rxrpc_local *local; struct rxrpc_net *rxnet = rxrpc_net(net); struct hlist_node *cursor; - const char *age; long diff; int ret; @@ -229,10 +240,9 @@ struct rxrpc_local *rxrpc_lookup_local(struct net *net, * we're attempting to use a local address that the dying * object is still using. */ - if (!rxrpc_use_local(local)) + if (!rxrpc_use_local(local, rxrpc_local_use_lookup)) break; - age = "old"; goto found; } @@ -250,14 +260,9 @@ struct rxrpc_local *rxrpc_lookup_local(struct net *net, } else { hlist_add_head_rcu(&local->link, &rxnet->local_endpoints); } - age = "new"; found: mutex_unlock(&rxnet->local_mutex); - - _net("LOCAL %s %d {%pISp}", - age, local->debug_id, &local->srx.transport); - _leave(" = %p", local); return local; @@ -279,64 +284,49 @@ addr_in_use: /* * Get a ref on a local endpoint. */ -struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *local) +struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *local, + enum rxrpc_local_trace why) { - const void *here = __builtin_return_address(0); - int r; + int r, u; + u = atomic_read(&local->active_users); __refcount_inc(&local->ref, &r); - trace_rxrpc_local(local->debug_id, rxrpc_local_got, r + 1, here); + trace_rxrpc_local(local->debug_id, why, r + 1, u); return local; } /* * Get a ref on a local endpoint unless its usage has already reached 0. */ -struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local) +struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local, + enum rxrpc_local_trace why) { - const void *here = __builtin_return_address(0); - int r; + int r, u; - if (local) { - if (__refcount_inc_not_zero(&local->ref, &r)) - trace_rxrpc_local(local->debug_id, rxrpc_local_got, - r + 1, here); - else - local = NULL; + if (local && __refcount_inc_not_zero(&local->ref, &r)) { + u = atomic_read(&local->active_users); + trace_rxrpc_local(local->debug_id, why, r + 1, u); + return local; } - return local; -} -/* - * Queue a local endpoint and pass the caller's reference to the work item. - */ -void rxrpc_queue_local(struct rxrpc_local *local) -{ - const void *here = __builtin_return_address(0); - unsigned int debug_id = local->debug_id; - int r = refcount_read(&local->ref); - - if (rxrpc_queue_work(&local->processor)) - trace_rxrpc_local(debug_id, rxrpc_local_queued, r + 1, here); - else - rxrpc_put_local(local); + return NULL; } /* * Drop a ref on a local endpoint. */ -void rxrpc_put_local(struct rxrpc_local *local) +void rxrpc_put_local(struct rxrpc_local *local, enum rxrpc_local_trace why) { - const void *here = __builtin_return_address(0); unsigned int debug_id; bool dead; - int r; + int r, u; if (local) { debug_id = local->debug_id; + u = atomic_read(&local->active_users); dead = __refcount_dec_and_test(&local->ref, &r); - trace_rxrpc_local(debug_id, rxrpc_local_put, r, here); + trace_rxrpc_local(debug_id, why, r, u); if (dead) call_rcu(&local->rcu, rxrpc_local_rcu); @@ -346,14 +336,15 @@ void rxrpc_put_local(struct rxrpc_local *local) /* * Start using a local endpoint. */ -struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *local) +struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *local, + enum rxrpc_local_trace why) { - local = rxrpc_get_local_maybe(local); + local = rxrpc_get_local_maybe(local, rxrpc_local_get_for_use); if (!local) return NULL; - if (!__rxrpc_use_local(local)) { - rxrpc_put_local(local); + if (!__rxrpc_use_local(local, why)) { + rxrpc_put_local(local, rxrpc_local_put_for_use); return NULL; } @@ -362,15 +353,19 @@ struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *local) /* * Cease using a local endpoint. Once the number of active users reaches 0, we - * start the closure of the transport in the work processor. + * start the closure of the transport in the I/O thread.. */ -void rxrpc_unuse_local(struct rxrpc_local *local) +void rxrpc_unuse_local(struct rxrpc_local *local, enum rxrpc_local_trace why) { + unsigned int debug_id = local->debug_id; + int r, u; + if (local) { - if (__rxrpc_unuse_local(local)) { - rxrpc_get_local(local); - rxrpc_queue_local(local); - } + r = refcount_read(&local->ref); + u = atomic_dec_return(&local->active_users); + trace_rxrpc_local(debug_id, why, r, u); + if (u == 0) + kthread_stop(local->io_thread); } } @@ -381,7 +376,7 @@ void rxrpc_unuse_local(struct rxrpc_local *local) * Closing the socket cannot be done from bottom half context or RCU callback * context because it might sleep. */ -static void rxrpc_local_destroyer(struct rxrpc_local *local) +void rxrpc_destroy_local(struct rxrpc_local *local) { struct socket *socket = local->socket; struct rxrpc_net *rxnet = local->rxnet; @@ -408,52 +403,7 @@ static void rxrpc_local_destroyer(struct rxrpc_local *local) /* At this point, there should be no more packets coming in to the * local endpoint. */ - rxrpc_purge_queue(&local->reject_queue); - rxrpc_purge_queue(&local->event_queue); -} - -/* - * Process events on an endpoint. The work item carries a ref which - * we must release. - */ -static void rxrpc_local_processor(struct work_struct *work) -{ - struct rxrpc_local *local = - container_of(work, struct rxrpc_local, processor); - bool again; - - if (local->dead) - return; - - trace_rxrpc_local(local->debug_id, rxrpc_local_processing, - refcount_read(&local->ref), NULL); - - do { - again = false; - if (!__rxrpc_use_local(local)) { - rxrpc_local_destroyer(local); - break; - } - - if (!list_empty(&local->ack_tx_queue)) { - rxrpc_transmit_ack_packets(local); - again = true; - } - - if (!skb_queue_empty(&local->reject_queue)) { - rxrpc_reject_packets(local); - again = true; - } - - if (!skb_queue_empty(&local->event_queue)) { - rxrpc_process_local_events(local); - again = true; - } - - __rxrpc_unuse_local(local); - } while (again); - - rxrpc_put_local(local); + rxrpc_purge_queue(&local->rx_queue); } /* @@ -463,13 +413,8 @@ static void rxrpc_local_rcu(struct rcu_head *rcu) { struct rxrpc_local *local = container_of(rcu, struct rxrpc_local, rcu); - _enter("%d", local->debug_id); - - ASSERT(!work_pending(&local->processor)); - - _net("DESTROY LOCAL %d", local->debug_id); + rxrpc_see_local(local, rxrpc_local_free); kfree(local); - _leave(""); } /* diff --git a/net/rxrpc/net_ns.c b/net/rxrpc/net_ns.c index 84242c0e467c..5905530e2f33 100644 --- a/net/rxrpc/net_ns.c +++ b/net/rxrpc/net_ns.c @@ -65,7 +65,7 @@ static __net_init int rxrpc_init_net(struct net *net) atomic_set(&rxnet->nr_client_conns, 0); rxnet->kill_all_client_conns = false; spin_lock_init(&rxnet->client_conn_cache_lock); - spin_lock_init(&rxnet->client_conn_discard_lock); + mutex_init(&rxnet->client_conn_discard_lock); INIT_LIST_HEAD(&rxnet->idle_client_conns); INIT_WORK(&rxnet->client_conn_reaper, rxrpc_discard_expired_client_conns); diff --git a/net/rxrpc/output.c b/net/rxrpc/output.c index c5eed0e83e47..3d8c9f830ee0 100644 --- a/net/rxrpc/output.c +++ b/net/rxrpc/output.c @@ -142,8 +142,8 @@ retry: txb->ack.reason = RXRPC_ACK_IDLE; } - mtu = conn->params.peer->if_mtu; - mtu -= conn->params.peer->hdrsize; + mtu = conn->peer->if_mtu; + mtu -= conn->peer->hdrsize; jmax = rxrpc_rx_jumbo_max; qsize = (window - 1) - call->rx_consumed; rsize = max_t(int, call->rx_winsize - qsize, 0); @@ -203,12 +203,11 @@ static void rxrpc_cancel_rtt_probe(struct rxrpc_call *call, } /* - * Send an ACK call packet. + * Transmit an ACK packet. */ -static int rxrpc_send_ack_packet(struct rxrpc_local *local, struct rxrpc_txbuf *txb) +int rxrpc_send_ack_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb) { struct rxrpc_connection *conn; - struct rxrpc_call *call = txb->call; struct msghdr msg; struct kvec iov[1]; rxrpc_serial_t serial; @@ -229,11 +228,6 @@ static int rxrpc_send_ack_packet(struct rxrpc_local *local, struct rxrpc_txbuf * if (txb->ack.reason == RXRPC_ACK_PING) txb->wire.flags |= RXRPC_REQUEST_ACK; - if (txb->ack.reason == RXRPC_ACK_DELAY) - clear_bit(RXRPC_CALL_DELAY_ACK_PENDING, &call->flags); - if (txb->ack.reason == RXRPC_ACK_IDLE) - clear_bit(RXRPC_CALL_IDLE_ACK_PENDING, &call->flags); - n = rxrpc_fill_out_ack(conn, call, txb); if (n == 0) return 0; @@ -247,8 +241,6 @@ static int rxrpc_send_ack_packet(struct rxrpc_local *local, struct rxrpc_txbuf * trace_rxrpc_tx_ack(call->debug_id, serial, ntohl(txb->ack.firstPacket), ntohl(txb->ack.serial), txb->ack.reason, txb->ack.nAcks); - if (txb->ack_why == rxrpc_propose_ack_ping_for_lost_ack) - call->acks_lost_ping = serial; if (txb->ack.reason == RXRPC_ACK_PING) rtt_slot = rxrpc_begin_rtt_probe(call, serial, rxrpc_rtt_tx_ping); @@ -259,7 +251,7 @@ static int rxrpc_send_ack_packet(struct rxrpc_local *local, struct rxrpc_txbuf * txb->ack.previousPacket = htonl(call->rx_highest_seq); iov_iter_kvec(&msg.msg_iter, WRITE, iov, 1, len); - ret = do_udp_sendmsg(conn->params.local->socket, &msg, len); + ret = do_udp_sendmsg(conn->local->socket, &msg, len); call->peer->last_tx_at = ktime_get_seconds(); if (ret < 0) trace_rxrpc_tx_fail(call->debug_id, serial, ret, @@ -279,44 +271,6 @@ static int rxrpc_send_ack_packet(struct rxrpc_local *local, struct rxrpc_txbuf * } /* - * ACK transmitter for a local endpoint. The UDP socket locks around each - * transmission, so we can only transmit one packet at a time, ACK, DATA or - * otherwise. - */ -void rxrpc_transmit_ack_packets(struct rxrpc_local *local) -{ - LIST_HEAD(queue); - int ret; - - trace_rxrpc_local(local->debug_id, rxrpc_local_tx_ack, - refcount_read(&local->ref), NULL); - - if (list_empty(&local->ack_tx_queue)) - return; - - spin_lock_bh(&local->ack_tx_lock); - list_splice_tail_init(&local->ack_tx_queue, &queue); - spin_unlock_bh(&local->ack_tx_lock); - - while (!list_empty(&queue)) { - struct rxrpc_txbuf *txb = - list_entry(queue.next, struct rxrpc_txbuf, tx_link); - - ret = rxrpc_send_ack_packet(local, txb); - if (ret < 0 && ret != -ECONNRESET) { - spin_lock_bh(&local->ack_tx_lock); - list_splice_init(&queue, &local->ack_tx_queue); - spin_unlock_bh(&local->ack_tx_lock); - break; - } - - list_del_init(&txb->tx_link); - rxrpc_put_call(txb->call, rxrpc_call_put); - rxrpc_put_txbuf(txb, rxrpc_txbuf_put_ack_tx); - } -} - -/* * Send an ABORT call packet. */ int rxrpc_send_abort_packet(struct rxrpc_call *call) @@ -358,7 +312,7 @@ int rxrpc_send_abort_packet(struct rxrpc_call *call) pkt.whdr.userStatus = 0; pkt.whdr.securityIndex = call->security_ix; pkt.whdr._rsvd = 0; - pkt.whdr.serviceId = htons(call->service_id); + pkt.whdr.serviceId = htons(call->dest_srx.srx_service); pkt.abort_code = htonl(call->abort_code); iov[0].iov_base = &pkt; @@ -368,8 +322,8 @@ int rxrpc_send_abort_packet(struct rxrpc_call *call) pkt.whdr.serial = htonl(serial); iov_iter_kvec(&msg.msg_iter, WRITE, iov, 1, sizeof(pkt)); - ret = do_udp_sendmsg(conn->params.local->socket, &msg, sizeof(pkt)); - conn->params.peer->last_tx_at = ktime_get_seconds(); + ret = do_udp_sendmsg(conn->local->socket, &msg, sizeof(pkt)); + conn->peer->last_tx_at = ktime_get_seconds(); if (ret < 0) trace_rxrpc_tx_fail(call->debug_id, serial, ret, rxrpc_tx_point_call_abort); @@ -395,12 +349,6 @@ int rxrpc_send_data_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb) _enter("%x,{%d}", txb->seq, txb->len); - if (hlist_unhashed(&call->error_link)) { - spin_lock_bh(&call->peer->lock); - hlist_add_head_rcu(&call->error_link, &call->peer->error_targets); - spin_unlock_bh(&call->peer->lock); - } - /* Each transmission of a Tx packet needs a new serial number */ serial = atomic_inc_return(&conn->serial); txb->wire.serial = htonl(serial); @@ -466,6 +414,14 @@ dont_set_request_ack: trace_rxrpc_tx_data(call, txb->seq, serial, txb->wire.flags, test_bit(RXRPC_TXBUF_RESENT, &txb->flags), false); + + /* Track what we've attempted to transmit at least once so that the + * retransmission algorithm doesn't try to resend what we haven't sent + * yet. However, this can race as we can receive an ACK before we get + * to this point. But, OTOH, if we won't get an ACK mentioning this + * packet unless the far side received it (though it could have + * discarded it anyway and NAK'd it). + */ cmpxchg(&call->tx_transmitted, txb->seq - 1, txb->seq); /* send the packet with the don't fragment bit set if we currently @@ -473,7 +429,7 @@ dont_set_request_ack: if (txb->len >= call->peer->maxdata) goto send_fragmentable; - down_read(&conn->params.local->defrag_sem); + down_read(&conn->local->defrag_sem); txb->last_sent = ktime_get_real(); if (txb->wire.flags & RXRPC_REQUEST_ACK) @@ -486,11 +442,12 @@ dont_set_request_ack: * message and update the peer record */ rxrpc_inc_stat(call->rxnet, stat_tx_data_send); - ret = do_udp_sendmsg(conn->params.local->socket, &msg, len); - conn->params.peer->last_tx_at = ktime_get_seconds(); + ret = do_udp_sendmsg(conn->local->socket, &msg, len); + conn->peer->last_tx_at = ktime_get_seconds(); - up_read(&conn->params.local->defrag_sem); + up_read(&conn->local->defrag_sem); if (ret < 0) { + rxrpc_inc_stat(call->rxnet, stat_tx_data_send_fail); rxrpc_cancel_rtt_probe(call, serial, rtt_slot); trace_rxrpc_tx_fail(call->debug_id, serial, ret, rxrpc_tx_point_call_data_nofrag); @@ -549,22 +506,22 @@ send_fragmentable: /* attempt to send this message with fragmentation enabled */ _debug("send fragment"); - down_write(&conn->params.local->defrag_sem); + down_write(&conn->local->defrag_sem); txb->last_sent = ktime_get_real(); if (txb->wire.flags & RXRPC_REQUEST_ACK) rtt_slot = rxrpc_begin_rtt_probe(call, serial, rxrpc_rtt_tx_data); - switch (conn->params.local->srx.transport.family) { + switch (conn->local->srx.transport.family) { case AF_INET6: case AF_INET: - ip_sock_set_mtu_discover(conn->params.local->socket->sk, + ip_sock_set_mtu_discover(conn->local->socket->sk, IP_PMTUDISC_DONT); rxrpc_inc_stat(call->rxnet, stat_tx_data_send_frag); - ret = do_udp_sendmsg(conn->params.local->socket, &msg, len); - conn->params.peer->last_tx_at = ktime_get_seconds(); + ret = do_udp_sendmsg(conn->local->socket, &msg, len); + conn->peer->last_tx_at = ktime_get_seconds(); - ip_sock_set_mtu_discover(conn->params.local->socket->sk, + ip_sock_set_mtu_discover(conn->local->socket->sk, IP_PMTUDISC_DO); break; @@ -573,6 +530,7 @@ send_fragmentable: } if (ret < 0) { + rxrpc_inc_stat(call->rxnet, stat_tx_data_send_fail); rxrpc_cancel_rtt_probe(call, serial, rtt_slot); trace_rxrpc_tx_fail(call->debug_id, serial, ret, rxrpc_tx_point_call_data_frag); @@ -582,26 +540,25 @@ send_fragmentable: } rxrpc_tx_backoff(call, ret); - up_write(&conn->params.local->defrag_sem); + up_write(&conn->local->defrag_sem); goto done; } /* - * reject packets through the local endpoint + * Reject a packet through the local endpoint. */ -void rxrpc_reject_packets(struct rxrpc_local *local) +void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb) { - struct sockaddr_rxrpc srx; - struct rxrpc_skb_priv *sp; struct rxrpc_wire_header whdr; - struct sk_buff *skb; + struct sockaddr_rxrpc srx; + struct rxrpc_skb_priv *sp = rxrpc_skb(skb); struct msghdr msg; struct kvec iov[2]; size_t size; __be32 code; int ret, ioc; - _enter("%d", local->debug_id); + rxrpc_see_skb(skb, rxrpc_skb_see_reject); iov[0].iov_base = &whdr; iov[0].iov_len = sizeof(whdr); @@ -615,52 +572,42 @@ void rxrpc_reject_packets(struct rxrpc_local *local) memset(&whdr, 0, sizeof(whdr)); - while ((skb = skb_dequeue(&local->reject_queue))) { - rxrpc_see_skb(skb, rxrpc_skb_seen); - sp = rxrpc_skb(skb); + switch (skb->mark) { + case RXRPC_SKB_MARK_REJECT_BUSY: + whdr.type = RXRPC_PACKET_TYPE_BUSY; + size = sizeof(whdr); + ioc = 1; + break; + case RXRPC_SKB_MARK_REJECT_ABORT: + whdr.type = RXRPC_PACKET_TYPE_ABORT; + code = htonl(skb->priority); + size = sizeof(whdr) + sizeof(code); + ioc = 2; + break; + default: + return; + } - switch (skb->mark) { - case RXRPC_SKB_MARK_REJECT_BUSY: - whdr.type = RXRPC_PACKET_TYPE_BUSY; - size = sizeof(whdr); - ioc = 1; - break; - case RXRPC_SKB_MARK_REJECT_ABORT: - whdr.type = RXRPC_PACKET_TYPE_ABORT; - code = htonl(skb->priority); - size = sizeof(whdr) + sizeof(code); - ioc = 2; - break; - default: - rxrpc_free_skb(skb, rxrpc_skb_freed); - continue; - } + if (rxrpc_extract_addr_from_skb(&srx, skb) == 0) { + msg.msg_namelen = srx.transport_len; - if (rxrpc_extract_addr_from_skb(&srx, skb) == 0) { - msg.msg_namelen = srx.transport_len; - - whdr.epoch = htonl(sp->hdr.epoch); - whdr.cid = htonl(sp->hdr.cid); - whdr.callNumber = htonl(sp->hdr.callNumber); - whdr.serviceId = htons(sp->hdr.serviceId); - whdr.flags = sp->hdr.flags; - whdr.flags ^= RXRPC_CLIENT_INITIATED; - whdr.flags &= RXRPC_CLIENT_INITIATED; - - iov_iter_kvec(&msg.msg_iter, WRITE, iov, ioc, size); - ret = do_udp_sendmsg(local->socket, &msg, size); - if (ret < 0) - trace_rxrpc_tx_fail(local->debug_id, 0, ret, - rxrpc_tx_point_reject); - else - trace_rxrpc_tx_packet(local->debug_id, &whdr, - rxrpc_tx_point_reject); - } + whdr.epoch = htonl(sp->hdr.epoch); + whdr.cid = htonl(sp->hdr.cid); + whdr.callNumber = htonl(sp->hdr.callNumber); + whdr.serviceId = htons(sp->hdr.serviceId); + whdr.flags = sp->hdr.flags; + whdr.flags ^= RXRPC_CLIENT_INITIATED; + whdr.flags &= RXRPC_CLIENT_INITIATED; - rxrpc_free_skb(skb, rxrpc_skb_freed); + iov_iter_kvec(&msg.msg_iter, WRITE, iov, ioc, size); + ret = do_udp_sendmsg(local->socket, &msg, size); + if (ret < 0) + trace_rxrpc_tx_fail(local->debug_id, 0, ret, + rxrpc_tx_point_reject); + else + trace_rxrpc_tx_packet(local->debug_id, &whdr, + rxrpc_tx_point_reject); } - - _leave(""); } /* @@ -701,8 +648,6 @@ void rxrpc_send_keepalive(struct rxrpc_peer *peer) len = iov[0].iov_len + iov[1].iov_len; - _proto("Tx VERSION (keepalive)"); - iov_iter_kvec(&msg.msg_iter, WRITE, iov, 2, len); ret = do_udp_sendmsg(peer->local->socket, &msg, len); if (ret < 0) @@ -715,3 +660,43 @@ void rxrpc_send_keepalive(struct rxrpc_peer *peer) peer->last_tx_at = ktime_get_seconds(); _leave(""); } + +/* + * Schedule an instant Tx resend. + */ +static inline void rxrpc_instant_resend(struct rxrpc_call *call, + struct rxrpc_txbuf *txb) +{ + if (call->state < RXRPC_CALL_COMPLETE) + kdebug("resend"); +} + +/* + * Transmit one packet. + */ +void rxrpc_transmit_one(struct rxrpc_call *call, struct rxrpc_txbuf *txb) +{ + int ret; + + ret = rxrpc_send_data_packet(call, txb); + if (ret < 0) { + switch (ret) { + case -ENETUNREACH: + case -EHOSTUNREACH: + case -ECONNREFUSED: + rxrpc_set_call_completion(call, RXRPC_CALL_LOCAL_ERROR, + 0, ret); + break; + default: + _debug("need instant resend %d", ret); + rxrpc_instant_resend(call, txb); + } + } else { + unsigned long now = jiffies; + unsigned long resend_at = now + call->peer->rto_j; + + WRITE_ONCE(call->resend_at, resend_at); + rxrpc_reduce_call_timer(call, resend_at, now, + rxrpc_timer_set_for_send); + } +} diff --git a/net/rxrpc/peer_event.c b/net/rxrpc/peer_event.c index cda3890657a9..6685bf917aa6 100644 --- a/net/rxrpc/peer_event.c +++ b/net/rxrpc/peer_event.c @@ -18,9 +18,9 @@ #include <net/ip.h> #include "ar-internal.h" -static void rxrpc_store_error(struct rxrpc_peer *, struct sock_exterr_skb *); -static void rxrpc_distribute_error(struct rxrpc_peer *, int, - enum rxrpc_call_completion); +static void rxrpc_store_error(struct rxrpc_peer *, struct sk_buff *); +static void rxrpc_distribute_error(struct rxrpc_peer *, struct sk_buff *, + enum rxrpc_call_completion, int); /* * Find the peer associated with a local error. @@ -48,13 +48,11 @@ static struct rxrpc_peer *rxrpc_lookup_peer_local_rcu(struct rxrpc_local *local, srx->transport.sin.sin_port = serr->port; switch (serr->ee.ee_origin) { case SO_EE_ORIGIN_ICMP: - _net("Rx ICMP"); memcpy(&srx->transport.sin.sin_addr, skb_network_header(skb) + serr->addr_offset, sizeof(struct in_addr)); break; case SO_EE_ORIGIN_ICMP6: - _net("Rx ICMP6 on v4 sock"); memcpy(&srx->transport.sin.sin_addr, skb_network_header(skb) + serr->addr_offset + 12, sizeof(struct in_addr)); @@ -70,14 +68,12 @@ static struct rxrpc_peer *rxrpc_lookup_peer_local_rcu(struct rxrpc_local *local, case AF_INET6: switch (serr->ee.ee_origin) { case SO_EE_ORIGIN_ICMP6: - _net("Rx ICMP6"); srx->transport.sin6.sin6_port = serr->port; memcpy(&srx->transport.sin6.sin6_addr, skb_network_header(skb) + serr->addr_offset, sizeof(struct in6_addr)); break; case SO_EE_ORIGIN_ICMP: - _net("Rx ICMP on v6 sock"); srx->transport_len = sizeof(srx->transport.sin); srx->transport.family = AF_INET; srx->transport.sin.sin_port = serr->port; @@ -106,13 +102,9 @@ static struct rxrpc_peer *rxrpc_lookup_peer_local_rcu(struct rxrpc_local *local, */ static void rxrpc_adjust_mtu(struct rxrpc_peer *peer, unsigned int mtu) { - _net("Rx ICMP Fragmentation Needed (%d)", mtu); - /* wind down the local interface MTU */ - if (mtu > 0 && peer->if_mtu == 65535 && mtu < peer->if_mtu) { + if (mtu > 0 && peer->if_mtu == 65535 && mtu < peer->if_mtu) peer->if_mtu = mtu; - _net("I/F MTU %u", mtu); - } if (mtu == 0) { /* they didn't give us a size, estimate one */ @@ -129,63 +121,36 @@ static void rxrpc_adjust_mtu(struct rxrpc_peer *peer, unsigned int mtu) } if (mtu < peer->mtu) { - spin_lock_bh(&peer->lock); + spin_lock(&peer->lock); peer->mtu = mtu; peer->maxdata = peer->mtu - peer->hdrsize; - spin_unlock_bh(&peer->lock); - _net("Net MTU %u (maxdata %u)", - peer->mtu, peer->maxdata); + spin_unlock(&peer->lock); } } /* * Handle an error received on the local endpoint. */ -void rxrpc_error_report(struct sock *sk) +void rxrpc_input_error(struct rxrpc_local *local, struct sk_buff *skb) { - struct sock_exterr_skb *serr; + struct sock_exterr_skb *serr = SKB_EXT_ERR(skb); struct sockaddr_rxrpc srx; - struct rxrpc_local *local; struct rxrpc_peer *peer = NULL; - struct sk_buff *skb; - rcu_read_lock(); - local = rcu_dereference_sk_user_data(sk); - if (unlikely(!local)) { - rcu_read_unlock(); - return; - } - _enter("%p{%d}", sk, local->debug_id); - - /* Clear the outstanding error value on the socket so that it doesn't - * cause kernel_sendmsg() to return it later. - */ - sock_error(sk); + _enter("L=%x", local->debug_id); - skb = sock_dequeue_err_skb(sk); - if (!skb) { - rcu_read_unlock(); - _leave("UDP socket errqueue empty"); - return; - } - rxrpc_new_skb(skb, rxrpc_skb_received); - serr = SKB_EXT_ERR(skb); if (!skb->len && serr->ee.ee_origin == SO_EE_ORIGIN_TIMESTAMPING) { _leave("UDP empty message"); - rcu_read_unlock(); - rxrpc_free_skb(skb, rxrpc_skb_freed); return; } + rcu_read_lock(); peer = rxrpc_lookup_peer_local_rcu(local, skb, &srx); - if (peer && !rxrpc_get_peer_maybe(peer)) + if (peer && !rxrpc_get_peer_maybe(peer, rxrpc_peer_get_input_error)) peer = NULL; - if (!peer) { - rcu_read_unlock(); - rxrpc_free_skb(skb, rxrpc_skb_freed); - _leave(" [no peer]"); + rcu_read_unlock(); + if (!peer) return; - } trace_rxrpc_rx_icmp(peer, &serr->ee, &srx); @@ -196,72 +161,26 @@ void rxrpc_error_report(struct sock *sk) goto out; } - rxrpc_store_error(peer, serr); + rxrpc_store_error(peer, skb); out: - rcu_read_unlock(); - rxrpc_free_skb(skb, rxrpc_skb_freed); - rxrpc_put_peer(peer); - - _leave(""); + rxrpc_put_peer(peer, rxrpc_peer_put_input_error); } /* * Map an error report to error codes on the peer record. */ -static void rxrpc_store_error(struct rxrpc_peer *peer, - struct sock_exterr_skb *serr) +static void rxrpc_store_error(struct rxrpc_peer *peer, struct sk_buff *skb) { enum rxrpc_call_completion compl = RXRPC_CALL_NETWORK_ERROR; - struct sock_extended_err *ee; - int err; + struct sock_exterr_skb *serr = SKB_EXT_ERR(skb); + struct sock_extended_err *ee = &serr->ee; + int err = ee->ee_errno; _enter(""); - ee = &serr->ee; - - err = ee->ee_errno; - switch (ee->ee_origin) { - case SO_EE_ORIGIN_ICMP: - switch (ee->ee_type) { - case ICMP_DEST_UNREACH: - switch (ee->ee_code) { - case ICMP_NET_UNREACH: - _net("Rx Received ICMP Network Unreachable"); - break; - case ICMP_HOST_UNREACH: - _net("Rx Received ICMP Host Unreachable"); - break; - case ICMP_PORT_UNREACH: - _net("Rx Received ICMP Port Unreachable"); - break; - case ICMP_NET_UNKNOWN: - _net("Rx Received ICMP Unknown Network"); - break; - case ICMP_HOST_UNKNOWN: - _net("Rx Received ICMP Unknown Host"); - break; - default: - _net("Rx Received ICMP DestUnreach code=%u", - ee->ee_code); - break; - } - break; - - case ICMP_TIME_EXCEEDED: - _net("Rx Received ICMP TTL Exceeded"); - break; - - default: - _proto("Rx Received ICMP error { type=%u code=%u }", - ee->ee_type, ee->ee_code); - break; - } - break; - case SO_EE_ORIGIN_NONE: case SO_EE_ORIGIN_LOCAL: - _proto("Rx Received local error { error=%d }", err); compl = RXRPC_CALL_LOCAL_ERROR; break; @@ -269,26 +188,40 @@ static void rxrpc_store_error(struct rxrpc_peer *peer, if (err == EACCES) err = EHOSTUNREACH; fallthrough; + case SO_EE_ORIGIN_ICMP: default: - _proto("Rx Received error report { orig=%u }", ee->ee_origin); break; } - rxrpc_distribute_error(peer, err, compl); + rxrpc_distribute_error(peer, skb, compl, err); } /* * Distribute an error that occurred on a peer. */ -static void rxrpc_distribute_error(struct rxrpc_peer *peer, int error, - enum rxrpc_call_completion compl) +static void rxrpc_distribute_error(struct rxrpc_peer *peer, struct sk_buff *skb, + enum rxrpc_call_completion compl, int err) { struct rxrpc_call *call; + HLIST_HEAD(error_targets); - hlist_for_each_entry_rcu(call, &peer->error_targets, error_link) { - rxrpc_see_call(call); - rxrpc_set_call_completion(call, compl, 0, -error); + spin_lock(&peer->lock); + hlist_move_list(&peer->error_targets, &error_targets); + + while (!hlist_empty(&error_targets)) { + call = hlist_entry(error_targets.first, + struct rxrpc_call, error_link); + hlist_del_init(&call->error_link); + spin_unlock(&peer->lock); + + rxrpc_see_call(call, rxrpc_call_see_distribute_error); + rxrpc_set_call_completion(call, compl, 0, -err); + rxrpc_input_call_event(call, skb); + + spin_lock(&peer->lock); } + + spin_unlock(&peer->lock); } /* @@ -304,18 +237,18 @@ static void rxrpc_peer_keepalive_dispatch(struct rxrpc_net *rxnet, time64_t keepalive_at; int slot; - spin_lock_bh(&rxnet->peer_hash_lock); + spin_lock(&rxnet->peer_hash_lock); while (!list_empty(collector)) { peer = list_entry(collector->next, struct rxrpc_peer, keepalive_link); list_del_init(&peer->keepalive_link); - if (!rxrpc_get_peer_maybe(peer)) + if (!rxrpc_get_peer_maybe(peer, rxrpc_peer_get_keepalive)) continue; - if (__rxrpc_use_local(peer->local)) { - spin_unlock_bh(&rxnet->peer_hash_lock); + if (__rxrpc_use_local(peer->local, rxrpc_local_use_peer_keepalive)) { + spin_unlock(&rxnet->peer_hash_lock); keepalive_at = peer->last_tx_at + RXRPC_KEEPALIVE_TIME; slot = keepalive_at - base; @@ -334,15 +267,15 @@ static void rxrpc_peer_keepalive_dispatch(struct rxrpc_net *rxnet, */ slot += cursor; slot &= mask; - spin_lock_bh(&rxnet->peer_hash_lock); + spin_lock(&rxnet->peer_hash_lock); list_add_tail(&peer->keepalive_link, &rxnet->peer_keepalive[slot & mask]); - rxrpc_unuse_local(peer->local); + rxrpc_unuse_local(peer->local, rxrpc_local_unuse_peer_keepalive); } - rxrpc_put_peer_locked(peer); + rxrpc_put_peer_locked(peer, rxrpc_peer_put_keepalive); } - spin_unlock_bh(&rxnet->peer_hash_lock); + spin_unlock(&rxnet->peer_hash_lock); } /* @@ -372,7 +305,7 @@ void rxrpc_peer_keepalive_worker(struct work_struct *work) * second; the bucket at cursor + 1 goes at now + 1s and so * on... */ - spin_lock_bh(&rxnet->peer_hash_lock); + spin_lock(&rxnet->peer_hash_lock); list_splice_init(&rxnet->peer_keepalive_new, &collector); stop = cursor + ARRAY_SIZE(rxnet->peer_keepalive); @@ -384,7 +317,7 @@ void rxrpc_peer_keepalive_worker(struct work_struct *work) } base = now; - spin_unlock_bh(&rxnet->peer_hash_lock); + spin_unlock(&rxnet->peer_hash_lock); rxnet->peer_keepalive_base = base; rxnet->peer_keepalive_cursor = cursor; diff --git a/net/rxrpc/peer_object.c b/net/rxrpc/peer_object.c index 041a51225c5f..608946dcc505 100644 --- a/net/rxrpc/peer_object.c +++ b/net/rxrpc/peer_object.c @@ -138,10 +138,8 @@ struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *local, unsigned long hash_key = rxrpc_peer_hash_key(local, srx); peer = __rxrpc_lookup_peer_rcu(local, srx, hash_key); - if (peer) { - _net("PEER %d {%pISp}", peer->debug_id, &peer->srx.transport); + if (peer) _leave(" = %p {u=%d}", peer, refcount_read(&peer->ref)); - } return peer; } @@ -207,9 +205,9 @@ static void rxrpc_assess_MTU_size(struct rxrpc_sock *rx, /* * Allocate a peer. */ -struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *local, gfp_t gfp) +struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *local, gfp_t gfp, + enum rxrpc_peer_trace why) { - const void *here = __builtin_return_address(0); struct rxrpc_peer *peer; _enter(""); @@ -217,7 +215,7 @@ struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *local, gfp_t gfp) peer = kzalloc(sizeof(struct rxrpc_peer), gfp); if (peer) { refcount_set(&peer->ref, 1); - peer->local = rxrpc_get_local(local); + peer->local = rxrpc_get_local(local, rxrpc_local_get_peer); INIT_HLIST_HEAD(&peer->error_targets); peer->service_conns = RB_ROOT; seqlock_init(&peer->service_conn_lock); @@ -228,7 +226,7 @@ struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *local, gfp_t gfp) rxrpc_peer_init_rtt(peer); peer->cong_ssthresh = RXRPC_TX_MAX_WINDOW; - trace_rxrpc_peer(peer->debug_id, rxrpc_peer_new, 1, here); + trace_rxrpc_peer(peer->debug_id, why, 1); } _leave(" = %p", peer); @@ -284,7 +282,7 @@ static struct rxrpc_peer *rxrpc_create_peer(struct rxrpc_sock *rx, _enter(""); - peer = rxrpc_alloc_peer(local, gfp); + peer = rxrpc_alloc_peer(local, gfp, rxrpc_peer_new_client); if (peer) { memcpy(&peer->srx, srx, sizeof(*srx)); rxrpc_init_peer(rx, peer, hash_key); @@ -296,7 +294,8 @@ static struct rxrpc_peer *rxrpc_create_peer(struct rxrpc_sock *rx, static void rxrpc_free_peer(struct rxrpc_peer *peer) { - rxrpc_put_local(peer->local); + trace_rxrpc_peer(peer->debug_id, 0, rxrpc_peer_free); + rxrpc_put_local(peer->local, rxrpc_local_put_peer); kfree_rcu(peer, rcu); } @@ -336,7 +335,7 @@ struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *rx, /* search the peer list first */ rcu_read_lock(); peer = __rxrpc_lookup_peer_rcu(local, srx, hash_key); - if (peer && !rxrpc_get_peer_maybe(peer)) + if (peer && !rxrpc_get_peer_maybe(peer, rxrpc_peer_get_lookup_client)) peer = NULL; rcu_read_unlock(); @@ -350,11 +349,11 @@ struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *rx, return NULL; } - spin_lock_bh(&rxnet->peer_hash_lock); + spin_lock(&rxnet->peer_hash_lock); /* Need to check that we aren't racing with someone else */ peer = __rxrpc_lookup_peer_rcu(local, srx, hash_key); - if (peer && !rxrpc_get_peer_maybe(peer)) + if (peer && !rxrpc_get_peer_maybe(peer, rxrpc_peer_get_lookup_client)) peer = NULL; if (!peer) { hash_add_rcu(rxnet->peer_hash, @@ -363,7 +362,7 @@ struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *rx, &rxnet->peer_keepalive_new); } - spin_unlock_bh(&rxnet->peer_hash_lock); + spin_unlock(&rxnet->peer_hash_lock); if (peer) rxrpc_free_peer(candidate); @@ -371,8 +370,6 @@ struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *rx, peer = candidate; } - _net("PEER %d {%pISp}", peer->debug_id, &peer->srx.transport); - _leave(" = %p {u=%d}", peer, refcount_read(&peer->ref)); return peer; } @@ -380,27 +377,26 @@ struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *rx, /* * Get a ref on a peer record. */ -struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer) +struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer, enum rxrpc_peer_trace why) { - const void *here = __builtin_return_address(0); int r; __refcount_inc(&peer->ref, &r); - trace_rxrpc_peer(peer->debug_id, rxrpc_peer_got, r + 1, here); + trace_rxrpc_peer(peer->debug_id, why, r + 1); return peer; } /* * Get a ref on a peer record unless its usage has already reached 0. */ -struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer) +struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer, + enum rxrpc_peer_trace why) { - const void *here = __builtin_return_address(0); int r; if (peer) { if (__refcount_inc_not_zero(&peer->ref, &r)) - trace_rxrpc_peer(peer->debug_id, rxrpc_peer_got, r + 1, here); + trace_rxrpc_peer(peer->debug_id, r + 1, why); else peer = NULL; } @@ -416,10 +412,10 @@ static void __rxrpc_put_peer(struct rxrpc_peer *peer) ASSERT(hlist_empty(&peer->error_targets)); - spin_lock_bh(&rxnet->peer_hash_lock); + spin_lock(&rxnet->peer_hash_lock); hash_del_rcu(&peer->hash_link); list_del_init(&peer->keepalive_link); - spin_unlock_bh(&rxnet->peer_hash_lock); + spin_unlock(&rxnet->peer_hash_lock); rxrpc_free_peer(peer); } @@ -427,9 +423,8 @@ static void __rxrpc_put_peer(struct rxrpc_peer *peer) /* * Drop a ref on a peer record. */ -void rxrpc_put_peer(struct rxrpc_peer *peer) +void rxrpc_put_peer(struct rxrpc_peer *peer, enum rxrpc_peer_trace why) { - const void *here = __builtin_return_address(0); unsigned int debug_id; bool dead; int r; @@ -437,7 +432,7 @@ void rxrpc_put_peer(struct rxrpc_peer *peer) if (peer) { debug_id = peer->debug_id; dead = __refcount_dec_and_test(&peer->ref, &r); - trace_rxrpc_peer(debug_id, rxrpc_peer_put, r - 1, here); + trace_rxrpc_peer(debug_id, r - 1, why); if (dead) __rxrpc_put_peer(peer); } @@ -447,15 +442,14 @@ void rxrpc_put_peer(struct rxrpc_peer *peer) * Drop a ref on a peer record where the caller already holds the * peer_hash_lock. */ -void rxrpc_put_peer_locked(struct rxrpc_peer *peer) +void rxrpc_put_peer_locked(struct rxrpc_peer *peer, enum rxrpc_peer_trace why) { - const void *here = __builtin_return_address(0); unsigned int debug_id = peer->debug_id; bool dead; int r; dead = __refcount_dec_and_test(&peer->ref, &r); - trace_rxrpc_peer(debug_id, rxrpc_peer_put, r - 1, here); + trace_rxrpc_peer(debug_id, r - 1, why); if (dead) { hash_del_rcu(&peer->hash_link); list_del_init(&peer->keepalive_link); diff --git a/net/rxrpc/proc.c b/net/rxrpc/proc.c index fae22a8b38d6..3a59591ec061 100644 --- a/net/rxrpc/proc.c +++ b/net/rxrpc/proc.c @@ -49,8 +49,6 @@ static void rxrpc_call_seq_stop(struct seq_file *seq, void *v) static int rxrpc_call_seq_show(struct seq_file *seq, void *v) { struct rxrpc_local *local; - struct rxrpc_sock *rx; - struct rxrpc_peer *peer; struct rxrpc_call *call; struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq)); unsigned long timeout = 0; @@ -63,28 +61,19 @@ static int rxrpc_call_seq_show(struct seq_file *seq, void *v) "Proto Local " " Remote " " SvID ConnID CallID End Use State Abort " - " DebugId TxSeq TW RxSeq RW RxSerial RxTimo\n"); + " DebugId TxSeq TW RxSeq RW RxSerial CW RxTimo\n"); return 0; } call = list_entry(v, struct rxrpc_call, link); - rx = rcu_dereference(call->socket); - if (rx) { - local = READ_ONCE(rx->local); - if (local) - sprintf(lbuff, "%pISpc", &local->srx.transport); - else - strcpy(lbuff, "no_local"); - } else { - strcpy(lbuff, "no_socket"); - } - - peer = call->peer; - if (peer) - sprintf(rbuff, "%pISpc", &peer->srx.transport); + local = call->local; + if (local) + sprintf(lbuff, "%pISpc", &local->srx.transport); else - strcpy(rbuff, "no_connection"); + strcpy(lbuff, "no_local"); + + sprintf(rbuff, "%pISpc", &call->dest_srx.transport); if (call->state != RXRPC_CALL_SERVER_PREALLOC) { timeout = READ_ONCE(call->expect_rx_by); @@ -95,10 +84,10 @@ static int rxrpc_call_seq_show(struct seq_file *seq, void *v) wtmp = atomic64_read_acquire(&call->ackr_window); seq_printf(seq, "UDP %-47.47s %-47.47s %4x %08x %08x %s %3u" - " %-8.8s %08x %08x %08x %02x %08x %02x %08x %06lx\n", + " %-8.8s %08x %08x %08x %02x %08x %02x %08x %02x %06lx\n", lbuff, rbuff, - call->service_id, + call->dest_srx.srx_service, call->cid, call->call_id, rxrpc_is_service_call(call) ? "Svc" : "Clt", @@ -109,6 +98,7 @@ static int rxrpc_call_seq_show(struct seq_file *seq, void *v) acks_hard_ack, READ_ONCE(call->tx_top) - acks_hard_ack, lower_32_bits(wtmp), upper_32_bits(wtmp) - lower_32_bits(wtmp), call->rx_serial, + call->cong_cwnd, timeout); return 0; @@ -159,7 +149,7 @@ static int rxrpc_connection_seq_show(struct seq_file *seq, void *v) seq_puts(seq, "Proto Local " " Remote " - " SvID ConnID End Use State Key " + " SvID ConnID End Ref Act State Key " " Serial ISerial CallId0 CallId1 CallId2 CallId3\n" ); return 0; @@ -172,12 +162,12 @@ static int rxrpc_connection_seq_show(struct seq_file *seq, void *v) goto print; } - sprintf(lbuff, "%pISpc", &conn->params.local->srx.transport); + sprintf(lbuff, "%pISpc", &conn->local->srx.transport); - sprintf(rbuff, "%pISpc", &conn->params.peer->srx.transport); + sprintf(rbuff, "%pISpc", &conn->peer->srx.transport); print: seq_printf(seq, - "UDP %-47.47s %-47.47s %4x %08x %s %3u" + "UDP %-47.47s %-47.47s %4x %08x %s %3u %3d" " %s %08x %08x %08x %08x %08x %08x %08x\n", lbuff, rbuff, @@ -185,8 +175,9 @@ print: conn->proto.cid, rxrpc_conn_is_service(conn) ? "Svc" : "Clt", refcount_read(&conn->ref), + atomic_read(&conn->active), rxrpc_conn_states[conn->state], - key_serial(conn->params.key), + key_serial(conn->key), atomic_read(&conn->serial), conn->hi_serial, conn->channels[0].call_id, @@ -341,7 +332,7 @@ static int rxrpc_local_seq_show(struct seq_file *seq, void *v) if (v == SEQ_START_TOKEN) { seq_puts(seq, "Proto Local " - " Use Act\n"); + " Use Act RxQ\n"); return 0; } @@ -350,10 +341,11 @@ static int rxrpc_local_seq_show(struct seq_file *seq, void *v) sprintf(lbuff, "%pISpc", &local->srx.transport); seq_printf(seq, - "UDP %-47.47s %3u %3u\n", + "UDP %-47.47s %3u %3u %3u\n", lbuff, refcount_read(&local->ref), - atomic_read(&local->active_users)); + atomic_read(&local->active_users), + local->rx_queue.qlen); return 0; } @@ -407,13 +399,16 @@ int rxrpc_stats_show(struct seq_file *seq, void *v) struct rxrpc_net *rxnet = rxrpc_net(seq_file_single_net(seq)); seq_printf(seq, - "Data : send=%u sendf=%u\n", + "Data : send=%u sendf=%u fail=%u\n", atomic_read(&rxnet->stat_tx_data_send), - atomic_read(&rxnet->stat_tx_data_send_frag)); + atomic_read(&rxnet->stat_tx_data_send_frag), + atomic_read(&rxnet->stat_tx_data_send_fail)); seq_printf(seq, - "Data-Tx : nr=%u retrans=%u\n", + "Data-Tx : nr=%u retrans=%u uf=%u cwr=%u\n", atomic_read(&rxnet->stat_tx_data), - atomic_read(&rxnet->stat_tx_data_retrans)); + atomic_read(&rxnet->stat_tx_data_retrans), + atomic_read(&rxnet->stat_tx_data_underflow), + atomic_read(&rxnet->stat_tx_data_cwnd_reset)); seq_printf(seq, "Data-Rx : nr=%u reqack=%u jumbo=%u\n", atomic_read(&rxnet->stat_rx_data), @@ -462,6 +457,9 @@ int rxrpc_stats_show(struct seq_file *seq, void *v) "Buffers : txb=%u rxb=%u\n", atomic_read(&rxrpc_nr_txbuf), atomic_read(&rxrpc_n_rx_skbs)); + seq_printf(seq, + "IO-thread: loops=%u\n", + atomic_read(&rxnet->stat_io_loop)); return 0; } @@ -478,8 +476,11 @@ int rxrpc_stats_clear(struct file *file, char *buf, size_t size) atomic_set(&rxnet->stat_tx_data, 0); atomic_set(&rxnet->stat_tx_data_retrans, 0); + atomic_set(&rxnet->stat_tx_data_underflow, 0); + atomic_set(&rxnet->stat_tx_data_cwnd_reset, 0); atomic_set(&rxnet->stat_tx_data_send, 0); atomic_set(&rxnet->stat_tx_data_send_frag, 0); + atomic_set(&rxnet->stat_tx_data_send_fail, 0); atomic_set(&rxnet->stat_rx_data, 0); atomic_set(&rxnet->stat_rx_data_reqack, 0); atomic_set(&rxnet->stat_rx_data_jumbo, 0); @@ -491,5 +492,7 @@ int rxrpc_stats_clear(struct file *file, char *buf, size_t size) memset(&rxnet->stat_rx_acks, 0, sizeof(rxnet->stat_rx_acks)); memset(&rxnet->stat_why_req_ack, 0, sizeof(rxnet->stat_why_req_ack)); + + atomic_set(&rxnet->stat_io_loop, 0); return size; } diff --git a/net/rxrpc/recvmsg.c b/net/rxrpc/recvmsg.c index efb85f983657..36b25d003cf0 100644 --- a/net/rxrpc/recvmsg.c +++ b/net/rxrpc/recvmsg.c @@ -36,16 +36,16 @@ void rxrpc_notify_socket(struct rxrpc_call *call) sk = &rx->sk; if (rx && sk->sk_state < RXRPC_CLOSE) { if (call->notify_rx) { - spin_lock_bh(&call->notify_lock); + spin_lock(&call->notify_lock); call->notify_rx(sk, call, call->user_call_ID); - spin_unlock_bh(&call->notify_lock); + spin_unlock(&call->notify_lock); } else { - write_lock_bh(&rx->recvmsg_lock); + write_lock(&rx->recvmsg_lock); if (list_empty(&call->recvmsg_link)) { - rxrpc_get_call(call, rxrpc_call_got); + rxrpc_get_call(call, rxrpc_call_get_notify_socket); list_add_tail(&call->recvmsg_link, &rx->recvmsg_q); } - write_unlock_bh(&rx->recvmsg_lock); + write_unlock(&rx->recvmsg_lock); if (!sock_flag(sk, SOCK_DEAD)) { _debug("call %ps", sk->sk_data_ready); @@ -87,9 +87,9 @@ bool rxrpc_set_call_completion(struct rxrpc_call *call, bool ret = false; if (call->state < RXRPC_CALL_COMPLETE) { - write_lock_bh(&call->state_lock); + write_lock(&call->state_lock); ret = __rxrpc_set_call_completion(call, compl, abort_code, error); - write_unlock_bh(&call->state_lock); + write_unlock(&call->state_lock); } return ret; } @@ -107,9 +107,9 @@ bool rxrpc_call_completed(struct rxrpc_call *call) bool ret = false; if (call->state < RXRPC_CALL_COMPLETE) { - write_lock_bh(&call->state_lock); + write_lock(&call->state_lock); ret = __rxrpc_call_completed(call); - write_unlock_bh(&call->state_lock); + write_unlock(&call->state_lock); } return ret; } @@ -131,9 +131,9 @@ bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, { bool ret; - write_lock_bh(&call->state_lock); + write_lock(&call->state_lock); ret = __rxrpc_abort_call(why, call, seq, abort_code, error); - write_unlock_bh(&call->state_lock); + write_unlock(&call->state_lock); return ret; } @@ -193,23 +193,23 @@ static void rxrpc_end_rx_phase(struct rxrpc_call *call, rxrpc_serial_t serial) if (call->state == RXRPC_CALL_CLIENT_RECV_REPLY) rxrpc_propose_delay_ACK(call, serial, rxrpc_propose_ack_terminal_ack); - write_lock_bh(&call->state_lock); + write_lock(&call->state_lock); switch (call->state) { case RXRPC_CALL_CLIENT_RECV_REPLY: __rxrpc_call_completed(call); - write_unlock_bh(&call->state_lock); + write_unlock(&call->state_lock); break; case RXRPC_CALL_SERVER_RECV_REQUEST: call->state = RXRPC_CALL_SERVER_ACK_REQUEST; call->expect_req_by = jiffies + MAX_JIFFY_OFFSET; - write_unlock_bh(&call->state_lock); + write_unlock(&call->state_lock); rxrpc_propose_delay_ACK(call, serial, rxrpc_propose_ack_processing_op); break; default: - write_unlock_bh(&call->state_lock); + write_unlock(&call->state_lock); break; } } @@ -228,9 +228,8 @@ static void rxrpc_rotate_rx_window(struct rxrpc_call *call) _enter("%d", call->debug_id); -further_rotation: skb = skb_dequeue(&call->recvmsg_queue); - rxrpc_see_skb(skb, rxrpc_skb_rotated); + rxrpc_see_skb(skb, rxrpc_skb_see_rotate); sp = rxrpc_skb(skb); tseq = sp->hdr.seq; @@ -241,7 +240,7 @@ further_rotation: if (after(tseq, call->rx_consumed)) smp_store_release(&call->rx_consumed, tseq); - rxrpc_free_skb(skb, rxrpc_skb_freed); + rxrpc_free_skb(skb, rxrpc_skb_put_rotate); trace_rxrpc_receive(call, last ? rxrpc_receive_rotate_last : rxrpc_receive_rotate, serial, call->rx_consumed); @@ -250,26 +249,12 @@ further_rotation: return; } - /* The next packet on the queue might entirely overlap with the one we - * just consumed; if so, rotate that away also. - */ - skb = skb_peek(&call->recvmsg_queue); - if (skb) { - sp = rxrpc_skb(skb); - if (sp->hdr.seq != call->rx_consumed && - after_eq(call->rx_consumed, sp->hdr.seq)) - goto further_rotation; - } - /* Check to see if there's an ACK that needs sending. */ acked = atomic_add_return(call->rx_consumed - old_consumed, &call->ackr_nr_consumed); if (acked > 2 && - !test_and_set_bit(RXRPC_CALL_IDLE_ACK_PENDING, &call->flags)) { - rxrpc_send_ACK(call, RXRPC_ACK_IDLE, serial, - rxrpc_propose_ack_rotate_rx); - rxrpc_transmit_ack_packets(call->peer->local); - } + !test_and_set_bit(RXRPC_CALL_RX_IS_IDLE, &call->flags)) + rxrpc_poke_call(call, rxrpc_call_poke_idle); } /* @@ -314,15 +299,10 @@ static int rxrpc_recvmsg_data(struct socket *sock, struct rxrpc_call *call, */ skb = skb_peek(&call->recvmsg_queue); while (skb) { - rxrpc_see_skb(skb, rxrpc_skb_seen); + rxrpc_see_skb(skb, rxrpc_skb_see_recvmsg); sp = rxrpc_skb(skb); seq = sp->hdr.seq; - if (after_eq(call->rx_consumed, seq)) { - kdebug("obsolete %x %x", call->rx_consumed, seq); - goto skip_obsolete; - } - if (!(flags & MSG_PEEK)) trace_rxrpc_receive(call, rxrpc_receive_front, sp->hdr.serial, seq); @@ -340,7 +320,6 @@ static int rxrpc_recvmsg_data(struct socket *sock, struct rxrpc_call *call, ret = ret2; goto out; } - rxrpc_transmit_ack_packets(call->peer->local); } else { trace_rxrpc_recvdata(call, rxrpc_recvmsg_cont, seq, rx_pkt_offset, rx_pkt_len, 0); @@ -373,7 +352,6 @@ static int rxrpc_recvmsg_data(struct socket *sock, struct rxrpc_call *call, break; } - skip_obsolete: /* The whole packet has been transferred. */ if (sp->hdr.flags & RXRPC_LAST_PACKET) ret = 1; @@ -395,7 +373,7 @@ done: trace_rxrpc_recvdata(call, rxrpc_recvmsg_data_return, seq, rx_pkt_offset, rx_pkt_len, ret); if (ret == -EAGAIN) - set_bit(RXRPC_CALL_RX_UNDERRUN, &call->flags); + set_bit(RXRPC_CALL_RX_IS_IDLE, &call->flags); return ret; } @@ -463,14 +441,14 @@ try_again: /* Find the next call and dequeue it if we're not just peeking. If we * do dequeue it, that comes with a ref that we will need to release. */ - write_lock_bh(&rx->recvmsg_lock); + write_lock(&rx->recvmsg_lock); l = rx->recvmsg_q.next; call = list_entry(l, struct rxrpc_call, recvmsg_link); if (!(flags & MSG_PEEK)) list_del_init(&call->recvmsg_link); else - rxrpc_get_call(call, rxrpc_call_got); - write_unlock_bh(&rx->recvmsg_lock); + rxrpc_get_call(call, rxrpc_call_get_recvmsg); + write_unlock(&rx->recvmsg_lock); trace_rxrpc_recvmsg(call, rxrpc_recvmsg_dequeue, 0); @@ -508,11 +486,9 @@ try_again: } if (msg->msg_name && call->peer) { - struct sockaddr_rxrpc *srx = msg->msg_name; - size_t len = sizeof(call->peer->srx); + size_t len = sizeof(call->dest_srx); - memcpy(msg->msg_name, &call->peer->srx, len); - srx->srx_service = call->service_id; + memcpy(msg->msg_name, &call->dest_srx, len); msg->msg_namelen = len; } @@ -525,7 +501,6 @@ try_again: if (ret == -EAGAIN) ret = 0; - rxrpc_transmit_ack_packets(call->peer->local); if (!skb_queue_empty(&call->recvmsg_queue)) rxrpc_notify_socket(call); break; @@ -555,18 +530,18 @@ try_again: error_unlock_call: mutex_unlock(&call->user_mutex); - rxrpc_put_call(call, rxrpc_call_put); + rxrpc_put_call(call, rxrpc_call_put_recvmsg); trace_rxrpc_recvmsg(call, rxrpc_recvmsg_return, ret); return ret; error_requeue_call: if (!(flags & MSG_PEEK)) { - write_lock_bh(&rx->recvmsg_lock); + write_lock(&rx->recvmsg_lock); list_add(&call->recvmsg_link, &rx->recvmsg_q); - write_unlock_bh(&rx->recvmsg_lock); + write_unlock(&rx->recvmsg_lock); trace_rxrpc_recvmsg(call, rxrpc_recvmsg_requeue, 0); } else { - rxrpc_put_call(call, rxrpc_call_put); + rxrpc_put_call(call, rxrpc_call_put_recvmsg); } error_no_call: release_sock(&rx->sk); @@ -655,9 +630,8 @@ int rxrpc_kernel_recv_data(struct socket *sock, struct rxrpc_call *call, read_phase_complete: ret = 1; out: - rxrpc_transmit_ack_packets(call->peer->local); if (_service) - *_service = call->service_id; + *_service = call->dest_srx.srx_service; mutex_unlock(&call->user_mutex); _leave(" = %d [%zu,%d]", ret, iov_iter_count(iter), *_abort); return ret; diff --git a/net/rxrpc/rxkad.c b/net/rxrpc/rxkad.c index 110a5550c0a6..d1233720e05f 100644 --- a/net/rxrpc/rxkad.c +++ b/net/rxrpc/rxkad.c @@ -103,7 +103,7 @@ static int rxkad_init_connection_security(struct rxrpc_connection *conn, struct crypto_sync_skcipher *ci; int ret; - _enter("{%d},{%x}", conn->debug_id, key_serial(conn->params.key)); + _enter("{%d},{%x}", conn->debug_id, key_serial(conn->key)); conn->security_ix = token->security_index; @@ -118,7 +118,7 @@ static int rxkad_init_connection_security(struct rxrpc_connection *conn, sizeof(token->kad->session_key)) < 0) BUG(); - switch (conn->params.security_level) { + switch (conn->security_level) { case RXRPC_SECURITY_PLAIN: case RXRPC_SECURITY_AUTH: case RXRPC_SECURITY_ENCRYPT: @@ -150,7 +150,7 @@ static int rxkad_how_much_data(struct rxrpc_call *call, size_t remain, { size_t shdr, buf_size, chunk; - switch (call->conn->params.security_level) { + switch (call->conn->security_level) { default: buf_size = chunk = min_t(size_t, remain, RXRPC_JUMBO_DATALEN); shdr = 0; @@ -192,7 +192,7 @@ static int rxkad_prime_packet_security(struct rxrpc_connection *conn, _enter(""); - if (!conn->params.key) + if (!conn->key) return 0; tmpbuf = kmalloc(tmpsize, GFP_KERNEL); @@ -205,7 +205,7 @@ static int rxkad_prime_packet_security(struct rxrpc_connection *conn, return -ENOMEM; } - token = conn->params.key->payload.data[0]; + token = conn->key->payload.data[0]; memcpy(&iv, token->kad->session_key, sizeof(iv)); tmpbuf[0] = htonl(conn->proto.epoch); @@ -317,7 +317,7 @@ static int rxkad_secure_packet_encrypt(const struct rxrpc_call *call, } /* encrypt from the session key */ - token = call->conn->params.key->payload.data[0]; + token = call->conn->key->payload.data[0]; memcpy(&iv, token->kad->session_key, sizeof(iv)); sg_init_one(&sg, txb->data, txb->len); @@ -344,13 +344,13 @@ static int rxkad_secure_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb) int ret; _enter("{%d{%x}},{#%u},%u,", - call->debug_id, key_serial(call->conn->params.key), + call->debug_id, key_serial(call->conn->key), txb->seq, txb->len); if (!call->conn->rxkad.cipher) return 0; - ret = key_validate(call->conn->params.key); + ret = key_validate(call->conn->key); if (ret < 0) return ret; @@ -380,7 +380,7 @@ static int rxkad_secure_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb) y = 1; /* zero checksums are not permitted */ txb->wire.cksum = htons(y); - switch (call->conn->params.security_level) { + switch (call->conn->security_level) { case RXRPC_SECURITY_PLAIN: ret = 0; break; @@ -525,7 +525,7 @@ static int rxkad_verify_packet_2(struct rxrpc_call *call, struct sk_buff *skb, } /* decrypt from the session key */ - token = call->conn->params.key->payload.data[0]; + token = call->conn->key->payload.data[0]; memcpy(&iv, token->kad->session_key, sizeof(iv)); skcipher_request_set_sync_tfm(req, call->conn->rxkad.cipher); @@ -596,7 +596,7 @@ static int rxkad_verify_packet(struct rxrpc_call *call, struct sk_buff *skb) u32 x, y; _enter("{%d{%x}},{#%u}", - call->debug_id, key_serial(call->conn->params.key), seq); + call->debug_id, key_serial(call->conn->key), seq); if (!call->conn->rxkad.cipher) return 0; @@ -632,7 +632,7 @@ static int rxkad_verify_packet(struct rxrpc_call *call, struct sk_buff *skb) goto protocol_error; } - switch (call->conn->params.security_level) { + switch (call->conn->security_level) { case RXRPC_SECURITY_PLAIN: ret = 0; break; @@ -678,8 +678,8 @@ static int rxkad_issue_challenge(struct rxrpc_connection *conn) challenge.min_level = htonl(0); challenge.__padding = 0; - msg.msg_name = &conn->params.peer->srx.transport; - msg.msg_namelen = conn->params.peer->srx.transport_len; + msg.msg_name = &conn->peer->srx.transport; + msg.msg_namelen = conn->peer->srx.transport_len; msg.msg_control = NULL; msg.msg_controllen = 0; msg.msg_flags = 0; @@ -704,16 +704,15 @@ static int rxkad_issue_challenge(struct rxrpc_connection *conn) serial = atomic_inc_return(&conn->serial); whdr.serial = htonl(serial); - _proto("Tx CHALLENGE %%%u", serial); - ret = kernel_sendmsg(conn->params.local->socket, &msg, iov, 2, len); + ret = kernel_sendmsg(conn->local->socket, &msg, iov, 2, len); if (ret < 0) { trace_rxrpc_tx_fail(conn->debug_id, serial, ret, rxrpc_tx_point_rxkad_challenge); return -EAGAIN; } - conn->params.peer->last_tx_at = ktime_get_seconds(); + conn->peer->last_tx_at = ktime_get_seconds(); trace_rxrpc_tx_packet(conn->debug_id, &whdr, rxrpc_tx_point_rxkad_challenge); _leave(" = 0"); @@ -737,8 +736,8 @@ static int rxkad_send_response(struct rxrpc_connection *conn, _enter(""); - msg.msg_name = &conn->params.peer->srx.transport; - msg.msg_namelen = conn->params.peer->srx.transport_len; + msg.msg_name = &conn->peer->srx.transport; + msg.msg_namelen = conn->peer->srx.transport_len; msg.msg_control = NULL; msg.msg_controllen = 0; msg.msg_flags = 0; @@ -762,16 +761,15 @@ static int rxkad_send_response(struct rxrpc_connection *conn, serial = atomic_inc_return(&conn->serial); whdr.serial = htonl(serial); - _proto("Tx RESPONSE %%%u", serial); - ret = kernel_sendmsg(conn->params.local->socket, &msg, iov, 3, len); + ret = kernel_sendmsg(conn->local->socket, &msg, iov, 3, len); if (ret < 0) { trace_rxrpc_tx_fail(conn->debug_id, serial, ret, rxrpc_tx_point_rxkad_response); return -EAGAIN; } - conn->params.peer->last_tx_at = ktime_get_seconds(); + conn->peer->last_tx_at = ktime_get_seconds(); _leave(" = 0"); return 0; } @@ -834,15 +832,15 @@ static int rxkad_respond_to_challenge(struct rxrpc_connection *conn, u32 version, nonce, min_level, abort_code; int ret; - _enter("{%d,%x}", conn->debug_id, key_serial(conn->params.key)); + _enter("{%d,%x}", conn->debug_id, key_serial(conn->key)); eproto = tracepoint_string("chall_no_key"); abort_code = RX_PROTOCOL_ERROR; - if (!conn->params.key) + if (!conn->key) goto protocol_error; abort_code = RXKADEXPIRED; - ret = key_validate(conn->params.key); + ret = key_validate(conn->key); if (ret < 0) goto other_error; @@ -856,8 +854,7 @@ static int rxkad_respond_to_challenge(struct rxrpc_connection *conn, nonce = ntohl(challenge.nonce); min_level = ntohl(challenge.min_level); - _proto("Rx CHALLENGE %%%u { v=%u n=%u ml=%u }", - sp->hdr.serial, version, nonce, min_level); + trace_rxrpc_rx_challenge(conn, sp->hdr.serial, version, nonce, min_level); eproto = tracepoint_string("chall_ver"); abort_code = RXKADINCONSISTENCY; @@ -866,10 +863,10 @@ static int rxkad_respond_to_challenge(struct rxrpc_connection *conn, abort_code = RXKADLEVELFAIL; ret = -EACCES; - if (conn->params.security_level < min_level) + if (conn->security_level < min_level) goto other_error; - token = conn->params.key->payload.data[0]; + token = conn->key->payload.data[0]; /* build the response packet */ resp = kzalloc(sizeof(struct rxkad_response), GFP_NOFS); @@ -881,7 +878,7 @@ static int rxkad_respond_to_challenge(struct rxrpc_connection *conn, resp->encrypted.cid = htonl(conn->proto.cid); resp->encrypted.securityIndex = htonl(conn->security_ix); resp->encrypted.inc_nonce = htonl(nonce + 1); - resp->encrypted.level = htonl(conn->params.security_level); + resp->encrypted.level = htonl(conn->security_level); resp->kvno = htonl(token->kad->kvno); resp->ticket_len = htonl(token->kad->ticket_len); resp->encrypted.call_id[0] = htonl(conn->channels[0].call_counter); @@ -1139,8 +1136,8 @@ static int rxkad_verify_response(struct rxrpc_connection *conn, version = ntohl(response->version); ticket_len = ntohl(response->ticket_len); kvno = ntohl(response->kvno); - _proto("Rx RESPONSE %%%u { v=%u kv=%u tl=%u }", - sp->hdr.serial, version, kvno, ticket_len); + + trace_rxrpc_rx_response(conn, sp->hdr.serial, version, kvno, ticket_len); eproto = tracepoint_string("rxkad_rsp_ver"); abort_code = RXKADINCONSISTENCY; @@ -1229,7 +1226,7 @@ static int rxkad_verify_response(struct rxrpc_connection *conn, level = ntohl(response->encrypted.level); if (level > RXRPC_SECURITY_ENCRYPT) goto protocol_error_free; - conn->params.security_level = level; + conn->security_level = level; /* create a key to hold the security data and expiration time - after * this the connection security can be handled in exactly the same way diff --git a/net/rxrpc/rxperf.c b/net/rxrpc/rxperf.c new file mode 100644 index 000000000000..66f5eea291ff --- /dev/null +++ b/net/rxrpc/rxperf.c @@ -0,0 +1,619 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* In-kernel rxperf server for testing purposes. + * + * Copyright (C) 2022 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + */ + +#define pr_fmt(fmt) "rxperf: " fmt +#include <linux/module.h> +#include <linux/slab.h> +#include <net/sock.h> +#include <net/af_rxrpc.h> + +MODULE_DESCRIPTION("rxperf test server (afs)"); +MODULE_AUTHOR("Red Hat, Inc."); +MODULE_LICENSE("GPL"); + +#define RXPERF_PORT 7009 +#define RX_PERF_SERVICE 147 +#define RX_PERF_VERSION 3 +#define RX_PERF_SEND 0 +#define RX_PERF_RECV 1 +#define RX_PERF_RPC 3 +#define RX_PERF_FILE 4 +#define RX_PERF_MAGIC_COOKIE 0x4711 + +struct rxperf_proto_params { + __be32 version; + __be32 type; + __be32 rsize; + __be32 wsize; +} __packed; + +static const u8 rxperf_magic_cookie[] = { 0x00, 0x00, 0x47, 0x11 }; +static const u8 secret[8] = { 0xa7, 0x83, 0x8a, 0xcb, 0xc7, 0x83, 0xec, 0x94 }; + +enum rxperf_call_state { + RXPERF_CALL_SV_AWAIT_PARAMS, /* Server: Awaiting parameter block */ + RXPERF_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */ + RXPERF_CALL_SV_REPLYING, /* Server: Replying */ + RXPERF_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */ + RXPERF_CALL_COMPLETE, /* Completed or failed */ +}; + +struct rxperf_call { + struct rxrpc_call *rxcall; + struct iov_iter iter; + struct kvec kvec[1]; + struct work_struct work; + const char *type; + size_t iov_len; + size_t req_len; /* Size of request blob */ + size_t reply_len; /* Size of reply blob */ + unsigned int debug_id; + unsigned int operation_id; + struct rxperf_proto_params params; + __be32 tmp[2]; + s32 abort_code; + enum rxperf_call_state state; + short error; + unsigned short unmarshal; + u16 service_id; + int (*deliver)(struct rxperf_call *call); + void (*processor)(struct work_struct *work); +}; + +static struct socket *rxperf_socket; +static struct key *rxperf_sec_keyring; /* Ring of security/crypto keys */ +static struct workqueue_struct *rxperf_workqueue; + +static void rxperf_deliver_to_call(struct work_struct *work); +static int rxperf_deliver_param_block(struct rxperf_call *call); +static int rxperf_deliver_request(struct rxperf_call *call); +static int rxperf_process_call(struct rxperf_call *call); +static void rxperf_charge_preallocation(struct work_struct *work); + +static DECLARE_WORK(rxperf_charge_preallocation_work, + rxperf_charge_preallocation); + +static inline void rxperf_set_call_state(struct rxperf_call *call, + enum rxperf_call_state to) +{ + call->state = to; +} + +static inline void rxperf_set_call_complete(struct rxperf_call *call, + int error, s32 remote_abort) +{ + if (call->state != RXPERF_CALL_COMPLETE) { + call->abort_code = remote_abort; + call->error = error; + call->state = RXPERF_CALL_COMPLETE; + } +} + +static void rxperf_rx_discard_new_call(struct rxrpc_call *rxcall, + unsigned long user_call_ID) +{ + kfree((struct rxperf_call *)user_call_ID); +} + +static void rxperf_rx_new_call(struct sock *sk, struct rxrpc_call *rxcall, + unsigned long user_call_ID) +{ + queue_work(rxperf_workqueue, &rxperf_charge_preallocation_work); +} + +static void rxperf_queue_call_work(struct rxperf_call *call) +{ + queue_work(rxperf_workqueue, &call->work); +} + +static void rxperf_notify_rx(struct sock *sk, struct rxrpc_call *rxcall, + unsigned long call_user_ID) +{ + struct rxperf_call *call = (struct rxperf_call *)call_user_ID; + + if (call->state != RXPERF_CALL_COMPLETE) + rxperf_queue_call_work(call); +} + +static void rxperf_rx_attach(struct rxrpc_call *rxcall, unsigned long user_call_ID) +{ + struct rxperf_call *call = (struct rxperf_call *)user_call_ID; + + call->rxcall = rxcall; +} + +static void rxperf_notify_end_reply_tx(struct sock *sock, + struct rxrpc_call *rxcall, + unsigned long call_user_ID) +{ + rxperf_set_call_state((struct rxperf_call *)call_user_ID, + RXPERF_CALL_SV_AWAIT_ACK); +} + +/* + * Charge the incoming call preallocation. + */ +static void rxperf_charge_preallocation(struct work_struct *work) +{ + struct rxperf_call *call; + + for (;;) { + call = kzalloc(sizeof(*call), GFP_KERNEL); + if (!call) + break; + + call->type = "unset"; + call->debug_id = atomic_inc_return(&rxrpc_debug_id); + call->deliver = rxperf_deliver_param_block; + call->state = RXPERF_CALL_SV_AWAIT_PARAMS; + call->service_id = RX_PERF_SERVICE; + call->iov_len = sizeof(call->params); + call->kvec[0].iov_len = sizeof(call->params); + call->kvec[0].iov_base = &call->params; + iov_iter_kvec(&call->iter, READ, call->kvec, 1, call->iov_len); + INIT_WORK(&call->work, rxperf_deliver_to_call); + + if (rxrpc_kernel_charge_accept(rxperf_socket, + rxperf_notify_rx, + rxperf_rx_attach, + (unsigned long)call, + GFP_KERNEL, + call->debug_id) < 0) + break; + call = NULL; + } + + kfree(call); +} + +/* + * Open an rxrpc socket and bind it to be a server for callback notifications + * - the socket is left in blocking mode and non-blocking ops use MSG_DONTWAIT + */ +static int rxperf_open_socket(void) +{ + struct sockaddr_rxrpc srx; + struct socket *socket; + int ret; + + ret = sock_create_kern(&init_net, AF_RXRPC, SOCK_DGRAM, PF_INET6, + &socket); + if (ret < 0) + goto error_1; + + socket->sk->sk_allocation = GFP_NOFS; + + /* bind the callback manager's address to make this a server socket */ + memset(&srx, 0, sizeof(srx)); + srx.srx_family = AF_RXRPC; + srx.srx_service = RX_PERF_SERVICE; + srx.transport_type = SOCK_DGRAM; + srx.transport_len = sizeof(srx.transport.sin6); + srx.transport.sin6.sin6_family = AF_INET6; + srx.transport.sin6.sin6_port = htons(RXPERF_PORT); + + ret = rxrpc_sock_set_min_security_level(socket->sk, + RXRPC_SECURITY_ENCRYPT); + if (ret < 0) + goto error_2; + + ret = rxrpc_sock_set_security_keyring(socket->sk, rxperf_sec_keyring); + + ret = kernel_bind(socket, (struct sockaddr *)&srx, sizeof(srx)); + if (ret < 0) + goto error_2; + + rxrpc_kernel_new_call_notification(socket, rxperf_rx_new_call, + rxperf_rx_discard_new_call); + + ret = kernel_listen(socket, INT_MAX); + if (ret < 0) + goto error_2; + + rxperf_socket = socket; + rxperf_charge_preallocation(&rxperf_charge_preallocation_work); + return 0; + +error_2: + sock_release(socket); +error_1: + pr_err("Can't set up rxperf socket: %d\n", ret); + return ret; +} + +/* + * close the rxrpc socket rxperf was using + */ +static void rxperf_close_socket(void) +{ + kernel_listen(rxperf_socket, 0); + kernel_sock_shutdown(rxperf_socket, SHUT_RDWR); + flush_workqueue(rxperf_workqueue); + sock_release(rxperf_socket); +} + +/* + * Log remote abort codes that indicate that we have a protocol disagreement + * with the server. + */ +static void rxperf_log_error(struct rxperf_call *call, s32 remote_abort) +{ + static int max = 0; + const char *msg; + int m; + + switch (remote_abort) { + case RX_EOF: msg = "unexpected EOF"; break; + case RXGEN_CC_MARSHAL: msg = "client marshalling"; break; + case RXGEN_CC_UNMARSHAL: msg = "client unmarshalling"; break; + case RXGEN_SS_MARSHAL: msg = "server marshalling"; break; + case RXGEN_SS_UNMARSHAL: msg = "server unmarshalling"; break; + case RXGEN_DECODE: msg = "opcode decode"; break; + case RXGEN_SS_XDRFREE: msg = "server XDR cleanup"; break; + case RXGEN_CC_XDRFREE: msg = "client XDR cleanup"; break; + case -32: msg = "insufficient data"; break; + default: + return; + } + + m = max; + if (m < 3) { + max = m + 1; + pr_info("Peer reported %s failure on %s\n", msg, call->type); + } +} + +/* + * deliver messages to a call + */ +static void rxperf_deliver_to_call(struct work_struct *work) +{ + struct rxperf_call *call = container_of(work, struct rxperf_call, work); + enum rxperf_call_state state; + u32 abort_code, remote_abort = 0; + int ret; + + if (call->state == RXPERF_CALL_COMPLETE) + return; + + while (state = call->state, + state == RXPERF_CALL_SV_AWAIT_PARAMS || + state == RXPERF_CALL_SV_AWAIT_REQUEST || + state == RXPERF_CALL_SV_AWAIT_ACK + ) { + if (state == RXPERF_CALL_SV_AWAIT_ACK) { + if (!rxrpc_kernel_check_life(rxperf_socket, call->rxcall)) + goto call_complete; + return; + } + + ret = call->deliver(call); + if (ret == 0) + ret = rxperf_process_call(call); + + switch (ret) { + case 0: + continue; + case -EINPROGRESS: + case -EAGAIN: + return; + case -ECONNABORTED: + rxperf_log_error(call, call->abort_code); + goto call_complete; + case -EOPNOTSUPP: + abort_code = RXGEN_OPCODE; + rxrpc_kernel_abort_call(rxperf_socket, call->rxcall, + abort_code, ret, "GOP"); + goto call_complete; + case -ENOTSUPP: + abort_code = RX_USER_ABORT; + rxrpc_kernel_abort_call(rxperf_socket, call->rxcall, + abort_code, ret, "GUA"); + goto call_complete; + case -EIO: + pr_err("Call %u in bad state %u\n", + call->debug_id, call->state); + fallthrough; + case -ENODATA: + case -EBADMSG: + case -EMSGSIZE: + case -ENOMEM: + case -EFAULT: + rxrpc_kernel_abort_call(rxperf_socket, call->rxcall, + RXGEN_SS_UNMARSHAL, ret, "GUM"); + goto call_complete; + default: + rxrpc_kernel_abort_call(rxperf_socket, call->rxcall, + RX_CALL_DEAD, ret, "GER"); + goto call_complete; + } + } + +call_complete: + rxperf_set_call_complete(call, ret, remote_abort); + /* The call may have been requeued */ + rxrpc_kernel_end_call(rxperf_socket, call->rxcall); + cancel_work(&call->work); + kfree(call); +} + +/* + * Extract a piece of data from the received data socket buffers. + */ +static int rxperf_extract_data(struct rxperf_call *call, bool want_more) +{ + u32 remote_abort = 0; + int ret; + + ret = rxrpc_kernel_recv_data(rxperf_socket, call->rxcall, &call->iter, + &call->iov_len, want_more, &remote_abort, + &call->service_id); + pr_debug("Extract i=%zu l=%zu m=%u ret=%d\n", + iov_iter_count(&call->iter), call->iov_len, want_more, ret); + if (ret == 0 || ret == -EAGAIN) + return ret; + + if (ret == 1) { + switch (call->state) { + case RXPERF_CALL_SV_AWAIT_REQUEST: + rxperf_set_call_state(call, RXPERF_CALL_SV_REPLYING); + break; + case RXPERF_CALL_COMPLETE: + pr_debug("premature completion %d", call->error); + return call->error; + default: + break; + } + return 0; + } + + rxperf_set_call_complete(call, ret, remote_abort); + return ret; +} + +/* + * Grab the operation ID from an incoming manager call. + */ +static int rxperf_deliver_param_block(struct rxperf_call *call) +{ + u32 version; + int ret; + + /* Extract the parameter block */ + ret = rxperf_extract_data(call, true); + if (ret < 0) + return ret; + + version = ntohl(call->params.version); + call->operation_id = ntohl(call->params.type); + call->deliver = rxperf_deliver_request; + + if (version != RX_PERF_VERSION) { + pr_info("Version mismatch %x\n", version); + return -ENOTSUPP; + } + + switch (call->operation_id) { + case RX_PERF_SEND: + call->type = "send"; + call->reply_len = 0; + call->iov_len = 4; /* Expect req size */ + break; + case RX_PERF_RECV: + call->type = "recv"; + call->req_len = 0; + call->iov_len = 4; /* Expect reply size */ + break; + case RX_PERF_RPC: + call->type = "rpc"; + call->iov_len = 8; /* Expect req size and reply size */ + break; + case RX_PERF_FILE: + call->type = "file"; + fallthrough; + default: + return -EOPNOTSUPP; + } + + rxperf_set_call_state(call, RXPERF_CALL_SV_AWAIT_REQUEST); + return call->deliver(call); +} + +/* + * Deliver the request data. + */ +static int rxperf_deliver_request(struct rxperf_call *call) +{ + int ret; + + switch (call->unmarshal) { + case 0: + call->kvec[0].iov_len = call->iov_len; + call->kvec[0].iov_base = call->tmp; + iov_iter_kvec(&call->iter, READ, call->kvec, 1, call->iov_len); + call->unmarshal++; + fallthrough; + case 1: + ret = rxperf_extract_data(call, true); + if (ret < 0) + return ret; + + switch (call->operation_id) { + case RX_PERF_SEND: + call->type = "send"; + call->req_len = ntohl(call->tmp[0]); + call->reply_len = 0; + break; + case RX_PERF_RECV: + call->type = "recv"; + call->req_len = 0; + call->reply_len = ntohl(call->tmp[0]); + break; + case RX_PERF_RPC: + call->type = "rpc"; + call->req_len = ntohl(call->tmp[0]); + call->reply_len = ntohl(call->tmp[1]); + break; + default: + pr_info("Can't parse extra params\n"); + return -EIO; + } + + pr_debug("CALL op=%s rq=%zx rp=%zx\n", + call->type, call->req_len, call->reply_len); + + call->iov_len = call->req_len; + iov_iter_discard(&call->iter, READ, call->req_len); + call->unmarshal++; + fallthrough; + case 2: + ret = rxperf_extract_data(call, false); + if (ret < 0) + return ret; + call->unmarshal++; + fallthrough; + default: + return 0; + } +} + +/* + * Process a call for which we've received the request. + */ +static int rxperf_process_call(struct rxperf_call *call) +{ + struct msghdr msg = {}; + struct bio_vec bv[1]; + struct kvec iov[1]; + ssize_t n; + size_t reply_len = call->reply_len, len; + + rxrpc_kernel_set_tx_length(rxperf_socket, call->rxcall, + reply_len + sizeof(rxperf_magic_cookie)); + + while (reply_len > 0) { + len = min_t(size_t, reply_len, PAGE_SIZE); + bv[0].bv_page = ZERO_PAGE(0); + bv[0].bv_offset = 0; + bv[0].bv_len = len; + iov_iter_bvec(&msg.msg_iter, WRITE, bv, 1, len); + msg.msg_flags = MSG_MORE; + n = rxrpc_kernel_send_data(rxperf_socket, call->rxcall, &msg, + len, rxperf_notify_end_reply_tx); + if (n < 0) + return n; + if (n == 0) + return -EIO; + reply_len -= n; + } + + len = sizeof(rxperf_magic_cookie); + iov[0].iov_base = (void *)rxperf_magic_cookie; + iov[0].iov_len = len; + iov_iter_kvec(&msg.msg_iter, WRITE, iov, 1, len); + msg.msg_flags = 0; + n = rxrpc_kernel_send_data(rxperf_socket, call->rxcall, &msg, len, + rxperf_notify_end_reply_tx); + if (n >= 0) + return 0; /* Success */ + + if (n == -ENOMEM) + rxrpc_kernel_abort_call(rxperf_socket, call->rxcall, + RXGEN_SS_MARSHAL, -ENOMEM, "GOM"); + return n; +} + +/* + * Add a key to the security keyring. + */ +static int rxperf_add_key(struct key *keyring) +{ + key_ref_t kref; + int ret; + + kref = key_create_or_update(make_key_ref(keyring, true), + "rxrpc_s", + __stringify(RX_PERF_SERVICE) ":2", + secret, + sizeof(secret), + KEY_POS_VIEW | KEY_POS_READ | KEY_POS_SEARCH + | KEY_USR_VIEW, + KEY_ALLOC_NOT_IN_QUOTA); + + if (IS_ERR(kref)) { + pr_err("Can't allocate rxperf server key: %ld\n", PTR_ERR(kref)); + return PTR_ERR(kref); + } + + ret = key_link(keyring, key_ref_to_ptr(kref)); + if (ret < 0) + pr_err("Can't link rxperf server key: %d\n", ret); + key_ref_put(kref); + return ret; +} + +/* + * Initialise the rxperf server. + */ +static int __init rxperf_init(void) +{ + struct key *keyring; + int ret = -ENOMEM; + + pr_info("Server registering\n"); + + rxperf_workqueue = alloc_workqueue("rxperf", 0, 0); + if (!rxperf_workqueue) + goto error_workqueue; + + keyring = keyring_alloc("rxperf_server", + GLOBAL_ROOT_UID, GLOBAL_ROOT_GID, current_cred(), + KEY_POS_VIEW | KEY_POS_READ | KEY_POS_SEARCH | + KEY_POS_WRITE | + KEY_USR_VIEW | KEY_USR_READ | KEY_USR_SEARCH | + KEY_USR_WRITE | + KEY_OTH_VIEW | KEY_OTH_READ | KEY_OTH_SEARCH, + KEY_ALLOC_NOT_IN_QUOTA, + NULL, NULL); + if (IS_ERR(keyring)) { + pr_err("Can't allocate rxperf server keyring: %ld\n", + PTR_ERR(keyring)); + goto error_keyring; + } + rxperf_sec_keyring = keyring; + ret = rxperf_add_key(keyring); + if (ret < 0) + goto error_key; + + ret = rxperf_open_socket(); + if (ret < 0) + goto error_socket; + return 0; + +error_socket: +error_key: + key_put(rxperf_sec_keyring); +error_keyring: + destroy_workqueue(rxperf_workqueue); + rcu_barrier(); +error_workqueue: + pr_err("Failed to register: %d\n", ret); + return ret; +} +late_initcall(rxperf_init); /* Must be called after net/ to create socket */ + +static void __exit rxperf_exit(void) +{ + pr_info("Server unregistering.\n"); + + rxperf_close_socket(); + key_put(rxperf_sec_keyring); + destroy_workqueue(rxperf_workqueue); + rcu_barrier(); +} +module_exit(rxperf_exit); + diff --git a/net/rxrpc/security.c b/net/rxrpc/security.c index 50cb5f1ee0c0..209f2c25a0da 100644 --- a/net/rxrpc/security.c +++ b/net/rxrpc/security.c @@ -63,13 +63,43 @@ const struct rxrpc_security *rxrpc_security_lookup(u8 security_index) } /* + * Initialise the security on a client call. + */ +int rxrpc_init_client_call_security(struct rxrpc_call *call) +{ + const struct rxrpc_security *sec; + struct rxrpc_key_token *token; + struct key *key = call->key; + int ret; + + if (!key) + return 0; + + ret = key_validate(key); + if (ret < 0) + return ret; + + for (token = key->payload.data[0]; token; token = token->next) { + sec = rxrpc_security_lookup(token->security_index); + if (sec) + goto found; + } + return -EKEYREJECTED; + +found: + call->security = sec; + _leave(" = 0"); + return 0; +} + +/* * initialise the security on a client connection */ int rxrpc_init_client_conn_security(struct rxrpc_connection *conn) { const struct rxrpc_security *sec; struct rxrpc_key_token *token; - struct key *key = conn->params.key; + struct key *key = conn->key; int ret; _enter("{%d},{%x}", conn->debug_id, key_serial(key)); @@ -163,7 +193,7 @@ struct key *rxrpc_look_up_server_security(struct rxrpc_connection *conn, rcu_read_lock(); - rx = rcu_dereference(conn->params.local->service); + rx = rcu_dereference(conn->local->service); if (!rx) goto out; diff --git a/net/rxrpc/sendmsg.c b/net/rxrpc/sendmsg.c index e5fd8a95bf71..9fa7e37f7155 100644 --- a/net/rxrpc/sendmsg.c +++ b/net/rxrpc/sendmsg.c @@ -22,30 +22,9 @@ */ static bool rxrpc_check_tx_space(struct rxrpc_call *call, rxrpc_seq_t *_tx_win) { - unsigned int win_size; - rxrpc_seq_t tx_win = smp_load_acquire(&call->acks_hard_ack); - - /* If we haven't transmitted anything for >1RTT, we should reset the - * congestion management state. - */ - if (ktime_before(ktime_add_us(call->tx_last_sent, - call->peer->srtt_us >> 3), - ktime_get_real())) { - if (RXRPC_TX_SMSS > 2190) - win_size = 2; - else if (RXRPC_TX_SMSS > 1095) - win_size = 3; - else - win_size = 4; - win_size += call->cong_extra; - } else { - win_size = min_t(unsigned int, call->tx_winsize, - call->cong_cwnd + call->cong_extra); - } - if (_tx_win) - *_tx_win = tx_win; - return call->tx_top - tx_win < win_size; + *_tx_win = call->tx_bottom; + return call->tx_prepared - call->tx_bottom < 256; } /* @@ -66,11 +45,6 @@ static int rxrpc_wait_for_tx_window_intr(struct rxrpc_sock *rx, if (signal_pending(current)) return sock_intr_errno(*timeo); - if (READ_ONCE(call->acks_hard_ack) != call->tx_bottom) { - rxrpc_shrink_call_tx_buffer(call); - continue; - } - trace_rxrpc_txqueue(call, rxrpc_txqueue_wait); *timeo = schedule_timeout(*timeo); } @@ -107,11 +81,6 @@ static int rxrpc_wait_for_tx_window_waitall(struct rxrpc_sock *rx, tx_win == tx_start && signal_pending(current)) return -EINTR; - if (READ_ONCE(call->acks_hard_ack) != call->tx_bottom) { - rxrpc_shrink_call_tx_buffer(call); - continue; - } - if (tx_win != tx_start) { timeout = rtt; tx_start = tx_win; @@ -137,11 +106,6 @@ static int rxrpc_wait_for_tx_window_nonintr(struct rxrpc_sock *rx, if (call->state >= RXRPC_CALL_COMPLETE) return call->error; - if (READ_ONCE(call->acks_hard_ack) != call->tx_bottom) { - rxrpc_shrink_call_tx_buffer(call); - continue; - } - trace_rxrpc_txqueue(call, rxrpc_txqueue_wait); *timeo = schedule_timeout(*timeo); } @@ -206,33 +170,32 @@ static void rxrpc_queue_packet(struct rxrpc_sock *rx, struct rxrpc_call *call, { unsigned long now; rxrpc_seq_t seq = txb->seq; - bool last = test_bit(RXRPC_TXBUF_LAST, &txb->flags); - int ret; + bool last = test_bit(RXRPC_TXBUF_LAST, &txb->flags), poke; rxrpc_inc_stat(call->rxnet, stat_tx_data); - ASSERTCMP(seq, ==, call->tx_top + 1); + ASSERTCMP(txb->seq, ==, call->tx_prepared + 1); /* We have to set the timestamp before queueing as the retransmit * algorithm can see the packet as soon as we queue it. */ txb->last_sent = ktime_get_real(); - /* Add the packet to the call's output buffer */ - rxrpc_get_txbuf(txb, rxrpc_txbuf_get_buffer); - spin_lock(&call->tx_lock); - list_add_tail(&txb->call_link, &call->tx_buffer); - call->tx_top = seq; - spin_unlock(&call->tx_lock); - if (last) trace_rxrpc_txqueue(call, rxrpc_txqueue_queue_last); else trace_rxrpc_txqueue(call, rxrpc_txqueue_queue); + /* Add the packet to the call's output buffer */ + spin_lock(&call->tx_lock); + poke = list_empty(&call->tx_sendmsg); + list_add_tail(&txb->call_link, &call->tx_sendmsg); + call->tx_prepared = seq; + spin_unlock(&call->tx_lock); + if (last || call->state == RXRPC_CALL_SERVER_ACK_REQUEST) { _debug("________awaiting reply/ACK__________"); - write_lock_bh(&call->state_lock); + write_lock(&call->state_lock); switch (call->state) { case RXRPC_CALL_CLIENT_SEND_REQUEST: call->state = RXRPC_CALL_CLIENT_AWAIT_REPLY; @@ -255,33 +218,11 @@ static void rxrpc_queue_packet(struct rxrpc_sock *rx, struct rxrpc_call *call, default: break; } - write_unlock_bh(&call->state_lock); + write_unlock(&call->state_lock); } - if (seq == 1 && rxrpc_is_client_call(call)) - rxrpc_expose_client_call(call); - - ret = rxrpc_send_data_packet(call, txb); - if (ret < 0) { - switch (ret) { - case -ENETUNREACH: - case -EHOSTUNREACH: - case -ECONNREFUSED: - rxrpc_set_call_completion(call, RXRPC_CALL_LOCAL_ERROR, - 0, ret); - goto out; - } - } else { - unsigned long now = jiffies; - unsigned long resend_at = now + call->peer->rto_j; - - WRITE_ONCE(call->resend_at, resend_at); - rxrpc_reduce_call_timer(call, resend_at, now, - rxrpc_timer_set_for_send); - } - -out: - rxrpc_put_txbuf(txb, rxrpc_txbuf_put_trans); + if (poke) + rxrpc_poke_call(call, rxrpc_call_poke_start); } /* @@ -335,8 +276,6 @@ reload: rxrpc_see_txbuf(txb, rxrpc_txbuf_see_send_more); do { - rxrpc_transmit_ack_packets(call->peer->local); - if (!txb) { size_t remain, bufsize, chunk, offset; @@ -416,10 +355,10 @@ reload: success: ret = copied; if (READ_ONCE(call->state) == RXRPC_CALL_COMPLETE) { - read_lock_bh(&call->state_lock); + read_lock(&call->state_lock); if (call->error < 0) ret = call->error; - read_unlock_bh(&call->state_lock); + read_unlock(&call->state_lock); } out: call->tx_pending = txb; @@ -604,7 +543,7 @@ rxrpc_new_client_call_for_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg, atomic_inc_return(&rxrpc_debug_id)); /* The socket is now unlocked */ - rxrpc_put_peer(cp.peer); + rxrpc_put_peer(cp.peer, rxrpc_peer_put_discard_tmp); _leave(" = %p\n", call); return call; } @@ -667,7 +606,7 @@ int rxrpc_do_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg, size_t len) case RXRPC_CALL_CLIENT_AWAIT_CONN: case RXRPC_CALL_SERVER_PREALLOC: case RXRPC_CALL_SERVER_SECURING: - rxrpc_put_call(call, rxrpc_call_put); + rxrpc_put_call(call, rxrpc_call_put_sendmsg); ret = -EBUSY; goto error_release_sock; default: @@ -737,7 +676,7 @@ out_put_unlock: if (!dropped_lock) mutex_unlock(&call->user_mutex); error_put: - rxrpc_put_call(call, rxrpc_call_put); + rxrpc_put_call(call, rxrpc_call_put_sendmsg); _leave(" = %d", ret); return ret; @@ -784,9 +723,9 @@ int rxrpc_kernel_send_data(struct socket *sock, struct rxrpc_call *call, notify_end_tx, &dropped_lock); break; case RXRPC_CALL_COMPLETE: - read_lock_bh(&call->state_lock); + read_lock(&call->state_lock); ret = call->error; - read_unlock_bh(&call->state_lock); + read_unlock(&call->state_lock); break; default: /* Request phase complete for this client call */ diff --git a/net/rxrpc/server_key.c b/net/rxrpc/server_key.c index ee269e0e6ee8..e51940589ee5 100644 --- a/net/rxrpc/server_key.c +++ b/net/rxrpc/server_key.c @@ -144,3 +144,28 @@ int rxrpc_server_keyring(struct rxrpc_sock *rx, sockptr_t optval, int optlen) _leave(" = 0 [key %x]", key->serial); return 0; } + +/** + * rxrpc_sock_set_security_keyring - Set the security keyring for a kernel service + * @sk: The socket to set the keyring on + * @keyring: The keyring to set + * + * Set the server security keyring on an rxrpc socket. This is used to provide + * the encryption keys for a kernel service. + */ +int rxrpc_sock_set_security_keyring(struct sock *sk, struct key *keyring) +{ + struct rxrpc_sock *rx = rxrpc_sk(sk); + int ret = 0; + + lock_sock(sk); + if (rx->securities) + ret = -EINVAL; + else if (rx->sk.sk_state != RXRPC_UNBOUND) + ret = -EISCONN; + else + rx->securities = key_get(keyring); + release_sock(sk); + return ret; +} +EXPORT_SYMBOL(rxrpc_sock_set_security_keyring); diff --git a/net/rxrpc/skbuff.c b/net/rxrpc/skbuff.c index 0c827d5bb2b8..ebe0c75e7b07 100644 --- a/net/rxrpc/skbuff.c +++ b/net/rxrpc/skbuff.c @@ -1,5 +1,5 @@ // SPDX-License-Identifier: GPL-2.0-or-later -/* ar-skbuff.c: socket buffer destruction handling +/* Socket buffer accounting * * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) @@ -19,56 +19,50 @@ /* * Note the allocation or reception of a socket buffer. */ -void rxrpc_new_skb(struct sk_buff *skb, enum rxrpc_skb_trace op) +void rxrpc_new_skb(struct sk_buff *skb, enum rxrpc_skb_trace why) { - const void *here = __builtin_return_address(0); int n = atomic_inc_return(select_skb_count(skb)); - trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n, here); + trace_rxrpc_skb(skb, refcount_read(&skb->users), n, why); } /* * Note the re-emergence of a socket buffer from a queue or buffer. */ -void rxrpc_see_skb(struct sk_buff *skb, enum rxrpc_skb_trace op) +void rxrpc_see_skb(struct sk_buff *skb, enum rxrpc_skb_trace why) { - const void *here = __builtin_return_address(0); if (skb) { int n = atomic_read(select_skb_count(skb)); - trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n, here); + trace_rxrpc_skb(skb, refcount_read(&skb->users), n, why); } } /* * Note the addition of a ref on a socket buffer. */ -void rxrpc_get_skb(struct sk_buff *skb, enum rxrpc_skb_trace op) +void rxrpc_get_skb(struct sk_buff *skb, enum rxrpc_skb_trace why) { - const void *here = __builtin_return_address(0); int n = atomic_inc_return(select_skb_count(skb)); - trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n, here); + trace_rxrpc_skb(skb, refcount_read(&skb->users), n, why); skb_get(skb); } /* * Note the dropping of a ref on a socket buffer by the core. */ -void rxrpc_eaten_skb(struct sk_buff *skb, enum rxrpc_skb_trace op) +void rxrpc_eaten_skb(struct sk_buff *skb, enum rxrpc_skb_trace why) { - const void *here = __builtin_return_address(0); int n = atomic_inc_return(&rxrpc_n_rx_skbs); - trace_rxrpc_skb(skb, op, 0, n, here); + trace_rxrpc_skb(skb, 0, n, why); } /* * Note the destruction of a socket buffer. */ -void rxrpc_free_skb(struct sk_buff *skb, enum rxrpc_skb_trace op) +void rxrpc_free_skb(struct sk_buff *skb, enum rxrpc_skb_trace why) { - const void *here = __builtin_return_address(0); if (skb) { - int n; - n = atomic_dec_return(select_skb_count(skb)); - trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n, here); + int n = atomic_dec_return(select_skb_count(skb)); + trace_rxrpc_skb(skb, refcount_read(&skb->users), n, why); kfree_skb(skb); } } @@ -78,12 +72,12 @@ void rxrpc_free_skb(struct sk_buff *skb, enum rxrpc_skb_trace op) */ void rxrpc_purge_queue(struct sk_buff_head *list) { - const void *here = __builtin_return_address(0); struct sk_buff *skb; + while ((skb = skb_dequeue((list))) != NULL) { int n = atomic_dec_return(select_skb_count(skb)); - trace_rxrpc_skb(skb, rxrpc_skb_purged, - refcount_read(&skb->users), n, here); + trace_rxrpc_skb(skb, refcount_read(&skb->users), n, + rxrpc_skb_put_purge); kfree_skb(skb); } } diff --git a/net/rxrpc/txbuf.c b/net/rxrpc/txbuf.c index 96bfee89927b..d2cf2aac3adb 100644 --- a/net/rxrpc/txbuf.c +++ b/net/rxrpc/txbuf.c @@ -26,7 +26,6 @@ struct rxrpc_txbuf *rxrpc_alloc_txbuf(struct rxrpc_call *call, u8 packet_type, INIT_LIST_HEAD(&txb->call_link); INIT_LIST_HEAD(&txb->tx_link); refcount_set(&txb->ref, 1); - txb->call = call; txb->call_debug_id = call->debug_id; txb->debug_id = atomic_inc_return(&rxrpc_txbuf_debug_ids); txb->space = sizeof(txb->data); @@ -34,7 +33,7 @@ struct rxrpc_txbuf *rxrpc_alloc_txbuf(struct rxrpc_call *call, u8 packet_type, txb->offset = 0; txb->flags = 0; txb->ack_why = 0; - txb->seq = call->tx_top + 1; + txb->seq = call->tx_prepared + 1; txb->wire.epoch = htonl(call->conn->proto.epoch); txb->wire.cid = htonl(call->cid); txb->wire.callNumber = htonl(call->call_id); @@ -44,7 +43,7 @@ struct rxrpc_txbuf *rxrpc_alloc_txbuf(struct rxrpc_call *call, u8 packet_type, txb->wire.userStatus = 0; txb->wire.securityIndex = call->security_ix; txb->wire._rsvd = 0; - txb->wire.serviceId = htons(call->service_id); + txb->wire.serviceId = htons(call->dest_srx.srx_service); trace_rxrpc_txbuf(txb->debug_id, txb->call_debug_id, txb->seq, 1, @@ -107,6 +106,7 @@ void rxrpc_shrink_call_tx_buffer(struct rxrpc_call *call) { struct rxrpc_txbuf *txb; rxrpc_seq_t hard_ack = smp_load_acquire(&call->acks_hard_ack); + bool wake = false; _enter("%x/%x/%x", call->tx_bottom, call->acks_hard_ack, call->tx_top); @@ -120,8 +120,10 @@ void rxrpc_shrink_call_tx_buffer(struct rxrpc_call *call) if (before(hard_ack, txb->seq)) break; + if (txb->seq != call->tx_bottom + 1) + rxrpc_see_txbuf(txb, rxrpc_txbuf_see_out_of_step); ASSERTCMP(txb->seq, ==, call->tx_bottom + 1); - call->tx_bottom++; + smp_store_release(&call->tx_bottom, call->tx_bottom + 1); list_del_rcu(&txb->call_link); trace_rxrpc_txqueue(call, rxrpc_txqueue_dequeue); @@ -129,7 +131,12 @@ void rxrpc_shrink_call_tx_buffer(struct rxrpc_call *call) spin_unlock(&call->tx_lock); rxrpc_put_txbuf(txb, rxrpc_txbuf_put_rotated); + if (after(call->acks_hard_ack, call->tx_bottom + 128)) + wake = true; } spin_unlock(&call->tx_lock); + + if (wake) + wake_up(&call->waitq); } |