[CIFS] /proc/fs/cifs debug code cleanup and new stats2
These changes to debug code and new stats are helpful in
debugging potential tcp performance/configuration problems under cifs.
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index c86b707..893a6fe 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -307,9 +307,15 @@
if(atomic_read(&ses->server->inFlight) >=
cifs_max_pending){
spin_unlock(&GlobalMid_Lock);
+#ifdef CONFIG_CIFS_STATS2
+ atomic_inc(&ses->server->num_waiters);
+#endif
wait_event(ses->server->request_q,
atomic_read(&ses->server->inFlight)
< cifs_max_pending);
+#ifdef CONFIG_CIFS_STATS2
+ atomic_dec(&ses->server->num_waiters);
+#endif
spin_lock(&GlobalMid_Lock);
} else {
if(ses->server->tcpStatus == CifsExiting) {
@@ -365,8 +371,14 @@
/* rc = cifs_sign_smb2(iov, n_vec, ses->server, &midQ->sequence_number); */
midQ->midState = MID_REQUEST_SUBMITTED;
+#ifdef CONFIG_CIFS_STATS2
+ atomic_inc(&ses->server->inSend);
+#endif
rc = smb_send2(ses->server->ssocket, iov, n_vec,
(struct sockaddr *) &(ses->server->addr.sockAddr));
+#ifdef CONFIG_CIFS_STATS2
+ atomic_dec(&ses->server->inSend);
+#endif
if(rc < 0) {
DeleteMidQEntry(midQ);
up(&ses->server->tcpSem);
@@ -546,9 +558,15 @@
if(atomic_read(&ses->server->inFlight) >=
cifs_max_pending){
spin_unlock(&GlobalMid_Lock);
+#ifdef CONFIG_CIFS_STATS2
+ atomic_inc(&ses->server->num_waiters);
+#endif
wait_event(ses->server->request_q,
atomic_read(&ses->server->inFlight)
< cifs_max_pending);
+#ifdef CONFIG_CIFS_STATS2
+ atomic_dec(&ses->server->num_waiters);
+#endif
spin_lock(&GlobalMid_Lock);
} else {
if(ses->server->tcpStatus == CifsExiting) {
@@ -617,8 +635,14 @@
rc = cifs_sign_smb(in_buf, ses->server, &midQ->sequence_number);
midQ->midState = MID_REQUEST_SUBMITTED;
+#ifdef CONFIG_CIFS_STATS2
+ atomic_inc(&ses->server->inSend);
+#endif
rc = smb_send(ses->server->ssocket, in_buf, in_buf->smb_buf_length,
(struct sockaddr *) &(ses->server->addr.sockAddr));
+#ifdef CONFIG_CIFS_STATS2
+ atomic_dec(&ses->server->inSend);
+#endif
if(rc < 0) {
DeleteMidQEntry(midQ);
up(&ses->server->tcpSem);