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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>
This commit is contained in:
Hyunchul Lee 2022-05-27 08:50:54 +09:00 committed by Steve French
parent 376b913382
commit 621433b7e2
1 changed files with 5 additions and 8 deletions
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13
fs/ksmbd/transport_rdma.c
View File

@ -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);