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CIFS: Optimize cifs_user_read() in a short read case on reconnects

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by filling the output buffer with a data got from a partially received
response and requesting the remaining data from the server. This is
suitable for non-signed connections.

Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
This commit is contained in:
Pavel Shilovsky
2014-07-10 11:31:48 +04:00
committed by Steve French
parent fb8a3e5255
commit d913ed17f0
3 changed files with 32 additions and 3 deletions
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6
fs/cifs/smb2pdu.c
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@@ -1729,6 +1729,12 @@ smb2_readv_callback(struct mid_q_entry *mid)
case MID_REQUEST_SUBMITTED:
case MID_RETRY_NEEDED:
rdata->result = -EAGAIN;
if (server->sign && rdata->got_bytes)
/* reset bytes number since we can not check a sign */
rdata->got_bytes = 0;
/* FIXME: should this be counted toward the initiating task? */
task_io_account_read(rdata->got_bytes);
cifs_stats_bytes_read(tcon, rdata->got_bytes);
break;
default:
if (rdata->result != -ENODATA)