From ad313cb86dfba27f8f2306da304974ef17c91c56 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Wed, 3 Apr 2013 10:27:36 -0400 Subject: [PATCH] cifs: on send failure, readjust server sequence number downward If sending a call to the server fails for some reason (for instance, the sending thread caught a signal), then we must readjust the sequence number downward again or the next send will have it too high. Signed-off-by: Jeff Layton Signed-off-by: Steve French Signed-off-by: Steve French --- fs/cifs/smb1ops.c | 3 +++ fs/cifs/transport.c | 13 +++++++++++++ 2 files changed, 16 insertions(+) diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c index 23bcd11..3efdb9d 100644 --- a/fs/cifs/smb1ops.c +++ b/fs/cifs/smb1ops.c @@ -61,6 +61,9 @@ send_nt_cancel(struct TCP_Server_Info *server, void *buf, */ --server->sequence_number; rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length)); + if (rc < 0) + server->sequence_number--; + mutex_unlock(&server->srv_mutex); cifs_dbg(FYI, "issued NT_CANCEL for mid %u, rc = %d\n", diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c index 653bf26..293d2c8 100644 --- a/fs/cifs/transport.c +++ b/fs/cifs/transport.c @@ -522,6 +522,9 @@ cifs_call_async(struct TCP_Server_Info *server, struct smb_rqst *rqst, rc = smb_send_rqst(server, rqst); cifs_in_send_dec(server); cifs_save_when_sent(mid); + + if (rc < 0) + server->sequence_number -= 2; mutex_unlock(&server->srv_mutex); if (rc == 0) @@ -711,6 +714,8 @@ SendReceive2(const unsigned int xid, struct cifs_ses *ses, cifs_in_send_dec(ses->server); cifs_save_when_sent(midQ); + if (rc < 0) + ses->server->sequence_number -= 2; mutex_unlock(&ses->server->srv_mutex); if (rc < 0) { @@ -835,6 +840,10 @@ SendReceive(const unsigned int xid, struct cifs_ses *ses, rc = smb_send(ses->server, in_buf, be32_to_cpu(in_buf->smb_buf_length)); cifs_in_send_dec(ses->server); cifs_save_when_sent(midQ); + + if (rc < 0) + ses->server->sequence_number -= 2; + mutex_unlock(&ses->server->srv_mutex); if (rc < 0) @@ -968,6 +977,10 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifs_tcon *tcon, rc = smb_send(ses->server, in_buf, be32_to_cpu(in_buf->smb_buf_length)); cifs_in_send_dec(ses->server); cifs_save_when_sent(midQ); + + if (rc < 0) + ses->server->sequence_number -= 2; + mutex_unlock(&ses->server->srv_mutex); if (rc < 0) { -- 2.7.4