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| author |  Hyunchul Lee <hyc.lee@gmail.com>
| 2022-05-27 08:50:54 +0900 |
|---|---|---|
| committer |  Steve French <stfrench@microsoft.com>
| 2022-05-27 21:31:20 -0500 |
| commit | 621433b7e25d6d42e5f75bd8c4a62d6c7251511b (patch) | |
| tree | 6d9623233bab68ad2d6a16a6187eb88ba3e93d62 /fs/ksmbd | |
| parent | ksmbd: fix outstanding credits related bugs (diff) | |
| download | linux-621433b7e25d6d42e5f75bd8c4a62d6c7251511b.tar.gz linux-621433b7e25d6d42e5f75bd8c4a62d6c7251511b.tar.bz2 linux-621433b7e25d6d42e5f75bd8c4a62d6c7251511b.zip | |
ksmbd: smbd: relax the count of sges required
Remove the condition that the count of sges
must be greater than or equal to
SMB_DIRECT_MAX_SEND_SGES(8).
Because ksmbd needs sges only for SMB direct
header, SMB2 transform header, SMB2 response,
and optional payload.
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Reviewed-by: Tom Talpey <tom@talpey.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/ksmbd')
| -rw-r--r-- | fs/ksmbd/transport_rdma.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/fs/ksmbd/transport_rdma.c b/fs/ksmbd/transport_rdma.c index e91acc2746bc..d035e060c2f0 100644 --- a/fs/ksmbd/transport_rdma.c +++ b/fs/ksmbd/transport_rdma.c @@ -1711,11 +1711,11 @@ static int smb_direct_init_params(struct smb_direct_transport *t, int max_send_sges, max_rw_wrs, max_send_wrs; unsigned int max_sge_per_wr, wrs_per_credit; - /* need 2 more sge. because a SMB_DIRECT header will be mapped, - * and maybe a send buffer could be not page aligned. + /* need 3 more sge. because a SMB_DIRECT header, SMB2 header, + * SMB2 response could be mapped. */ t->max_send_size = smb_direct_max_send_size; - max_send_sges = DIV_ROUND_UP(t->max_send_size, PAGE_SIZE) + 2; + max_send_sges = DIV_ROUND_UP(t->max_send_size, PAGE_SIZE) + 3; if (max_send_sges > SMB_DIRECT_MAX_SEND_SGES) { pr_err("max_send_size %d is too large\n", t->max_send_size); return -EINVAL; @@ -1736,6 +1736,8 @@ static int smb_direct_init_params(struct smb_direct_transport *t, max_sge_per_wr = min_t(unsigned int, device->attrs.max_send_sge, device->attrs.max_sge_rd); + max_sge_per_wr = max_t(unsigned int, max_sge_per_wr, + max_send_sges); wrs_per_credit = max_t(unsigned int, 4, DIV_ROUND_UP(t->pages_per_rw_credit, max_sge_per_wr) + 1); @@ -1760,11 +1762,6 @@ static int smb_direct_init_params(struct smb_direct_transport *t, return -EINVAL; } - if (device->attrs.max_send_sge < SMB_DIRECT_MAX_SEND_SGES) { - pr_err("warning: device max_send_sge = %d too small\n", - device->attrs.max_send_sge); - return -EINVAL; - } if (device->attrs.max_recv_sge < SMB_DIRECT_MAX_RECV_SGES) { pr_err("warning: device max_recv_sge = %d too small\n", device->attrs.max_recv_sge); |