Merge tag '4.20-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs updates from Steve French:
 "Three smb3 fixes for stable, patches for improved debugging and perf
  gathering, and much improved performance for most metadata operations
  (expanded use of compounding)"

* tag '4.20-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6: (46 commits)
  cifs: update internal module version number for cifs.ko to 2.14
  smb3: add debug for unexpected mid cancellation
  cifs: allow calling SMB2_xxx_free(NULL)
  smb3 - clean up debug output displaying network interfaces
  smb3: show number of current open files in /proc/fs/cifs/Stats
  cifs: add support for ioctl on directories
  cifs: fallback to older infolevels on findfirst queryinfo retry
  smb3: do not attempt cifs operation in smb3 query info error path
  smb3: send backup intent on compounded query info
  cifs: track writepages in vfs operation counters
  smb2: fix uninitialized variable bug in smb2_ioctl_query_info
  cifs: add IOCTL for QUERY_INFO passthrough to userspace
  cifs: minor clarification in comments
  CIFS: Print message when attempting a mount
  CIFS: Adds information-level logging function
  cifs: OFD locks do not conflict with eachothers
  CIFS: SMBD: Do not call ib_dereg_mr on invalidated memory registration
  CIFS: pass page offsets on SMB1 read/write
  fs/cifs: fix uninitialised variable warnings
  smb3: add tracepoint for sending lease break responses to server
  ...

1 files changed, 28 insertions, 0 deletions

diff --git a/fs/cifs/cifs_debug.h b/fs/cifs/cifs_debug.h
index f4f3f0853c6e..631dc1bb21c1 100644
--- a/fs/cifs/cifs_debug.h
+++ b/fs/cifs/cifs_debug.h
@@ -47,6 +47,29 @@ extern int cifsFYI;
  */
 #ifdef CONFIG_CIFS_DEBUG
 
+
+/*
+ * When adding tracepoints and debug messages we have various choices.
+ * Some considerations:
+ *
+ * Use cifs_dbg(VFS, ...) for things we always want logged, and the user to see
+ *     cifs_info(...) slightly less important, admin can filter via loglevel > 6
+ *     cifs_dbg(FYI, ...) minor debugging messages, off by default
+ *     trace_smb3_*  ftrace functions are preferred for complex debug messages
+ *                 intended for developers or experienced admins, off by default
+ */
+
+/* Information level messages, minor events */
+#define cifs_info_func(ratefunc, fmt, ...)			\
+do {								\
+	pr_info_ ## ratefunc("CIFS: " fmt, ##__VA_ARGS__); 	\
+} while (0)
+
+#define cifs_info(fmt, ...)					\
+do { 								\
+	cifs_info_func(ratelimited, fmt, ##__VA_ARGS__); 	\
+} while (0)
+
 /* information message: e.g., configuration, major event */
 #define cifs_dbg_func(ratefunc, type, fmt, ...)			\
 do {								\
@@ -81,6 +104,11 @@ do {									\
 	if (0)								\
 		pr_debug(fmt, ##__VA_ARGS__);				\
 } while (0)
+
+#define cifs_info(fmt, ...)						\
+do {									\
+	pr_info("CIFS: "fmt, ##__VA_ARGS__);				\
+} while (0)
 #endif
 
 #endif				/* _H_CIFS_DEBUG */