[CIFS] CIFS Stats improvements
New cifs_writepages routine was not updated bytes written in cifs stats.
Also added ability to clear /proc/fs/cifs/Stats by writing (0 or 1) to it.
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index d8865fb..981ea0d 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -59,7 +59,9 @@
temp->pid = current->pid;
temp->command = smb_buffer->Command;
cFYI(1, ("For smb_command %d", temp->command));
- do_gettimeofday(&temp->when_sent);
+ /* do_gettimeofday(&temp->when_sent);*/ /* easier to use jiffies */
+ /* when mid allocated can be before when sent */
+ temp->when_alloc = jiffies;
temp->ses = ses;
temp->tsk = current;
}
@@ -75,6 +77,9 @@
static void
DeleteMidQEntry(struct mid_q_entry *midEntry)
{
+#ifdef CONFIG_CIFS_STATS2
+ unsigned long now;
+#endif
spin_lock(&GlobalMid_Lock);
midEntry->midState = MID_FREE;
list_del(&midEntry->qhead);
@@ -84,6 +89,22 @@
cifs_buf_release(midEntry->resp_buf);
else
cifs_small_buf_release(midEntry->resp_buf);
+#ifdef CONFIG_CIFS_STATS2
+ now = jiffies;
+ /* commands taking longer than one second are indications that
+ something is wrong, unless it is quite a slow link or server */
+ if((now - midEntry->when_alloc) > HZ) {
+ if((cifsFYI & CIFS_TIMER) &&
+ (midEntry->command != SMB_COM_LOCKING_ANDX)) {
+ printk(KERN_DEBUG " CIFS slow rsp: cmd %d mid %d",
+ midEntry->command, midEntry->mid);
+ printk(" A: 0x%lx S: 0x%lx R: 0x%lx\n",
+ now - midEntry->when_alloc,
+ now - midEntry->when_sent,
+ now - midEntry->when_received);
+ }
+ }
+#endif
mempool_free(midEntry, cifs_mid_poolp);
}
@@ -382,6 +403,7 @@
(struct sockaddr *) &(ses->server->addr.sockAddr));
#ifdef CONFIG_CIFS_STATS2
atomic_dec(&ses->server->inSend);
+ midQ->when_sent = jiffies;
#endif
if(rc < 0) {
DeleteMidQEntry(midQ);
@@ -646,6 +668,7 @@
(struct sockaddr *) &(ses->server->addr.sockAddr));
#ifdef CONFIG_CIFS_STATS2
atomic_dec(&ses->server->inSend);
+ midQ->when_sent = jiffies;
#endif
if(rc < 0) {
DeleteMidQEntry(midQ);