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cifs: Defer read completion

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Defer read completion from the I/O thread to the cifsiod thread so as not
to slow down the I/O thread.  This restores the behaviour of v6.9.

Fixes: 3ee1a1fc39 ("cifs: Cut over to using netfslib")
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Paulo Alcantara <pc@manguebit.com>
cc: Jeff Layton <jlayton@kernel.org>
cc: linux-cifs@vger.kernel.org
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
David Howells 2024-06-20 20:30:00 +01:00 committed by Steve French
parent 8bf0287528
commit ce5291e560
1 changed files with 12 additions and 3 deletions
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15
fs/smb/client/smb2pdu.c
View file

@ -4484,6 +4484,16 @@ smb2_new_read_req(void **buf, unsigned int *total_len,
return rc;
}
static void smb2_readv_worker(struct work_struct *work)
{
struct cifs_io_subrequest *rdata =
container_of(work, struct cifs_io_subrequest, subreq.work);
netfs_subreq_terminated(&rdata->subreq,
(rdata->result == 0 || rdata->result == -EAGAIN) ?
rdata->got_bytes : rdata->result, true);
}
static void
smb2_readv_callback(struct mid_q_entry *mid)
{
@ -4578,9 +4588,8 @@ smb2_readv_callback(struct mid_q_entry *mid)
rdata->result = 0;
}
rdata->credits.value = 0;
netfs_subreq_terminated(&rdata->subreq,
(rdata->result == 0 || rdata->result == -EAGAIN) ?
rdata->got_bytes : rdata->result, true);
INIT_WORK(&rdata->subreq.work, smb2_readv_worker);
queue_work(cifsiod_wq, &rdata->subreq.work);
release_mid(mid);
add_credits(server, &credits, 0);
}