Fix typo in name of CIFS Kconfig option and add rename stats

fs/Kconfig

@@ -1595,7 +1595,7 @@ config CIFS_STATS
 	  mounted by the cifs client to be displayed in /proc/fs/cifs/Stats
 
 config CIFS_POSIX
-        bool "CIFS statistics (EXPERIMENTAL)"
+        bool "CIFS POSIX Extensions (EXPERIMENTAL)"
         depends on CIFS
         help
           Enabling this option will cause the cifs client to attempt to

fs/cifs/cifs_debug.c

@@ -108,7 +108,7 @@ cifs_debug_data_read(char *buf, char **beginBuffer, off_t offset,
 					mid_q_entry,
 					qhead);
 				if(mid_entry) {
-					length = sprintf(buf,"State: %d com: %d pid: %d tsk: %p\n",mid_entry->midState,mid_entry->command,mid_entry->pid,mid_entry->tsk);
+					length = sprintf(buf,"State: %d com: %d pid: %d tsk: %p mid %d\n",mid_entry->midState,mid_entry->command,mid_entry->pid,mid_entry->tsk,mid_entry->mid);
 					buf += length;
 				}
 			}
@@ -259,6 +259,12 @@ cifs_stats_read(char *buf, char **beginBuffer, off_t offset,
 			atomic_read(&tcon->num_rmdirs));
 		buf += item_length;
 		length += item_length;
+		item_length = sprintf(buf,
+			"\nRenames: %d T2 Renames %d",
+			atomic_read(&tcon->num_renames),
+			atomic_read(&tcon->num_t2renames));
+		buf += item_length;
+		length += item_length;
 	}
 	read_unlock(&GlobalSMBSeslock);
 

fs/cifs/cifsglob.h

@@ -211,6 +211,8 @@ struct cifsTconInfo {
 	atomic_t num_deletes;
 	atomic_t num_mkdirs;
 	atomic_t num_rmdirs;
+	atomic_t num_renames;
+	atomic_t num_t2renames;
 	__u64    bytes_read;
 	__u64    bytes_written;
 	spinlock_t stat_lock;

fs/cifs/cifssmb.c

@@ -941,7 +941,14 @@ CIFSSMBRename(const int xid, struct cifsTconInfo *tcon,
 			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
 	if (rc) {
 		cFYI(1, ("Send error in rename = %d", rc));
+	} 
+
+#ifdef CONFIG_CIFS_STATS
+	  else {
+		atomic_inc(&tcon->num_renames);
 	}
+#endif
+
 	if (pSMB)
 		cifs_buf_release(pSMB);
 
@@ -1017,7 +1024,11 @@ int CIFSSMBRenameOpenFile(const int xid,struct cifsTconInfo *pTcon,
 	if (rc) {
 		cFYI(1,("Send error in Rename (by file handle) = %d", rc));
 	}
-
+#ifdef CONFIG_CIFS_STATS
+	  else {
+		atomic_inc(&pTcon->num_t2renames);
+	}
+#endif
 	if (pSMB)
 		cifs_buf_release(pSMB);