From 8476c69a7fa0f1f9705ec0caa4e97c08b5045779 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Fri, 14 May 2021 15:56:31 -0400 Subject: NFSD: Capture every CB state transition We were missing one. As a clean-up, add a helper that sets the new CB state and fires a tracepoint. The tracepoint fires only when the state changes, to help reduce trace log noise. Signed-off-by: Chuck Lever Signed-off-by: J. Bruce Fields --- fs/nfsd/nfs4callback.c | 28 +++++++++++++++------------- 1 file changed, 15 insertions(+), 13 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index 7325592b456e..b6cc51a9f37c 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -945,20 +945,26 @@ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *c return 0; } +static void nfsd4_mark_cb_state(struct nfs4_client *clp, int newstate) +{ + if (clp->cl_cb_state != newstate) { + clp->cl_cb_state = newstate; + trace_nfsd_cb_state(clp); + } +} + static void nfsd4_mark_cb_down(struct nfs4_client *clp, int reason) { if (test_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags)) return; - clp->cl_cb_state = NFSD4_CB_DOWN; - trace_nfsd_cb_state(clp); + nfsd4_mark_cb_state(clp, NFSD4_CB_DOWN); } static void nfsd4_mark_cb_fault(struct nfs4_client *clp, int reason) { if (test_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags)) return; - clp->cl_cb_state = NFSD4_CB_FAULT; - trace_nfsd_cb_state(clp); + nfsd4_mark_cb_state(clp, NFSD4_CB_FAULT); } static void nfsd4_cb_probe_done(struct rpc_task *task, void *calldata) @@ -968,10 +974,8 @@ static void nfsd4_cb_probe_done(struct rpc_task *task, void *calldata) trace_nfsd_cb_done(clp, task->tk_status); if (task->tk_status) nfsd4_mark_cb_down(clp, task->tk_status); - else { - clp->cl_cb_state = NFSD4_CB_UP; - trace_nfsd_cb_state(clp); - } + else + nfsd4_mark_cb_state(clp, NFSD4_CB_UP); } static void nfsd4_cb_probe_release(void *calldata) @@ -995,8 +999,7 @@ static const struct rpc_call_ops nfsd4_cb_probe_ops = { */ void nfsd4_probe_callback(struct nfs4_client *clp) { - clp->cl_cb_state = NFSD4_CB_UNKNOWN; - trace_nfsd_cb_state(clp); + nfsd4_mark_cb_state(clp, NFSD4_CB_UNKNOWN); set_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags); nfsd4_run_cb(&clp->cl_cb_null); } @@ -1009,11 +1012,10 @@ void nfsd4_probe_callback_sync(struct nfs4_client *clp) void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *conn) { - clp->cl_cb_state = NFSD4_CB_UNKNOWN; + nfsd4_mark_cb_state(clp, NFSD4_CB_UNKNOWN); spin_lock(&clp->cl_lock); memcpy(&clp->cl_cb_conn, conn, sizeof(struct nfs4_cb_conn)); spin_unlock(&clp->cl_lock); - trace_nfsd_cb_state(clp); } /* @@ -1345,7 +1347,7 @@ nfsd4_run_cb_work(struct work_struct *work) * Don't send probe messages for 4.1 or later. */ if (!cb->cb_ops && clp->cl_minorversion) { - clp->cl_cb_state = NFSD4_CB_UP; + nfsd4_mark_cb_state(clp, NFSD4_CB_UP); nfsd41_destroy_cb(cb); return; } -- cgit v1.2.3