[CIFS] Add extended stats (STATS2) for total buffer allocations for

better performance debugging.

Signed-off-by: Steve French <sfrench@us.ibm.com>

4 files changed, 23 insertions, 2 deletions

diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index 22a444a3fe4c..7f19f2547d01 100644
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -219,6 +219,10 @@ cifs_stats_write(struct file *file, const char __user *buffer,
 
         if (c == '1' || c == 'y' || c == 'Y' || c == '0') {
                 read_lock(&GlobalSMBSeslock);
+#ifdef CONFIG_CIFS_STATS2
+                atomic_set(&totBufAllocCount, 0);
+                atomic_set(&totSmBufAllocCount, 0);
+#endif /* CONFIG_CIFS_STATS2 */
                 list_for_each(tmp, &GlobalTreeConnectionList) {
                         tcon = list_entry(tmp, struct cifsTconInfo,
                                         cifsConnectionList);
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 2a13a2bac8f1..ba90903909a6 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -954,6 +954,12 @@ init_cifs(void)
         atomic_set(&tconInfoReconnectCount, 0);
 
         atomic_set(&bufAllocCount, 0);
+        atomic_set(&smBufAllocCount, 0);
+#ifdef CONFIG_CIFS_STATS2
+        atomic_set(&totBufAllocCount, 0);
+        atomic_set(&totSmBufAllocCount, 0);
+#endif /* CONFIG_CIFS_STATS2 */
+
         atomic_set(&midCount, 0);
         GlobalCurrentXid = 0;
         GlobalTotalActiveXid = 0;
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 1ba08f8c5bc4..c011c278af4c 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -505,8 +505,12 @@ GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
 
 /* Various Debug counters to remove someday (BB) */
-GLOBAL_EXTERN atomic_t bufAllocCount;
-GLOBAL_EXTERN atomic_t smBufAllocCount;      
+GLOBAL_EXTERN atomic_t bufAllocCount;    /* current number allocated  */
+#ifdef CONFIG_CIFS_STATS2
+GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
+GLOBAL_EXTERN atomic_t totSmBufAllocCount;
+#endif
+GLOBAL_EXTERN atomic_t smBufAllocCount;
 GLOBAL_EXTERN atomic_t midCount;
 
 /* Misc globals */
diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index 9af37f864688..ac5a72a299a3 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -161,6 +161,9 @@ cifs_buf_get(void)
         if (ret_buf) {
                 memset(ret_buf, 0, sizeof(struct smb_hdr) + 3);
                 atomic_inc(&bufAllocCount);
+#ifdef CONFIG_CIFS_STATS2
+                atomic_inc(&totBufAllocCount);
+#endif /* CONFIG_CIFS_STATS2 */
         }
 
         return ret_buf;
@@ -195,6 +198,10 @@ cifs_small_buf_get(void)
         /* No need to clear memory here, cleared in header assemble */
         /*      memset(ret_buf, 0, sizeof(struct smb_hdr) + 27);*/
                 atomic_inc(&smBufAllocCount);
+#ifdef CONFIG_CIFS_STATS2
+                atomic_inc(&totSmBufAllocCount);
+#endif /* CONFIG_CIFS_STATS2 */
+
         }
         return ret_buf;
 }