[1/3] cifs: clarify the meaning of tcpStatus == CifsGood

Commit Message

Jeff Layton March 16, 2011, 7:15 p.m. UTC

None

Patch

difference between these two states, and we need to know this in order
to know whether we can send an echo or not.

Resolve this by adding a new statusEnum value -- CifsNeedNegotiate. When
the socket has been connected but has not yet had a NEGOTIATE_PROTOCOL
request done, set it to this value. Once the NEGOTIATE is done,
cifs_negotiate_protocol will set tcpStatus to CifsGood.

This also fixes and cleans the logic in cifs_reconnect and
cifs_reconnect_tcon. The old code checked for specific states when what
it really wants to know is whether the state has actually changed from
CifsNeedReconnect.

Reported-and-Tested-by: JG <[e-mail]>
Signed-off-by: Jeff Layton <[e-mail]>
---
 fs/cifs/cifsglob.h |    3 ++-
 fs/cifs/cifssmb.c  |    4 ++--
 fs/cifs/connect.c  |    8 ++++----
 3 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 398f596..62b7388 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -94,7 +94,8 @@  enum statusEnum {
 	CifsNew = 0,
 	CifsGood,
 	CifsExiting,
-	CifsNeedReconnect
+	CifsNeedReconnect,
+	CifsNeedNegotiate
 };
 
 enum securityEnum {
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 3c72e66..fc1dafd 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -142,9 +142,9 @@  cifs_reconnect_tcon(struct cifs_tcon *tcon, int smb_command)
 	 */
 	while (server->tcpStatus == CifsNeedReconnect) {
 		wait_event_interruptible_timeout(server->response_q,
-			(server->tcpStatus == CifsGood), 10 * HZ);
+			(server->tcpStatus != CifsNeedReconnect), 10 * HZ);
 
-		/* is TCP session is reestablished now ?*/
+		/* are we still trying to reconnect? */
 		if (server->tcpStatus != CifsNeedReconnect)
 			break;
 
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 4066e3e..32347ff 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -203,8 +203,7 @@  cifs_reconnect(struct TCP_Server_Info *server)
 	}
 	spin_unlock(&GlobalMid_Lock);
 
-	while ((server->tcpStatus != CifsExiting) &&
-	       (server->tcpStatus != CifsGood)) {
+	while (server->tcpStatus == CifsNeedReconnect) {
 		try_to_freeze();
 
 		/* we should try only the port we connected to before */
@@ -216,7 +215,7 @@  cifs_reconnect(struct TCP_Server_Info *server)
 			atomic_inc(&tcpSesReconnectCount);
 			spin_lock(&GlobalMid_Lock);
 			if (server->tcpStatus != CifsExiting)
-				server->tcpStatus = CifsGood;
+				server->tcpStatus = CifsNeedNegotiate;
 			spin_unlock(&GlobalMid_Lock);
 		}
 	}
@@ -425,7 +424,7 @@  cifs_demultiplex_thread(struct TCP_Server_Info *server)
 		pdu_length = 4; /* enough to get RFC1001 header */
 
 incomplete_rcv:
-		if (echo_retries > 0 &&
+		if (echo_retries > 0 && server->tcpStatus == CifsGood &&
 		    time_after(jiffies, server->lstrp +
 					(echo_retries * SMB_ECHO_INTERVAL))) {
 			cERROR(1, "Server %s has not responded in %d seconds. "
@@ -1781,6 +1780,7 @@  cifs_get_tcp_session(struct smb_vol *volume_info)
 		cERROR(1, "Error connecting to socket. Aborting operation");
 		goto out_err_crypto_release;
 	}
+	tcp_ses->tcpStatus = CifsNeedNegotiate;
 
 #ifdef CONFIG_CIFS_SMB2
 	if (volume_info->use_smb2)