UBIFS: extend debug/message capabilities

In the case where we have more than one volumes on different UBI
devices, it may be not that easy to tell which volume prints the
messages.  Add ubi number and volume id in ubifs_msg/warn/error
to help debug. These two values are passed by struct ubifs_info.

For those where ubifs_info is not initialized yet, ubifs_* is
replaced by pr_*. For those where ubifs_info is not avaliable,
ubifs_info is passed to the calling function as a const parameter.

The output looks like,

[   95.444879] UBIFS (ubi0:1): background thread "ubifs_bgt0_1" started, PID 696
[   95.484688] UBIFS (ubi0:1): UBIFS: mounted UBI device 0, volume 1, name "test1"
[   95.484694] UBIFS (ubi0:1): LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes
[   95.484699] UBIFS (ubi0:1): FS size: 30220288 bytes (28 MiB, 238 LEBs), journal size 1523712 bytes (1 MiB, 12 LEBs)
[   95.484703] UBIFS (ubi0:1): reserved for root: 1427378 bytes (1393 KiB)
[   95.484709] UBIFS (ubi0:1): media format: w4/r0 (latest is w4/r0), UUID 40DFFC0E-70BE-4193-8905-F7D6DFE60B17, small LPT model
[   95.489875] UBIFS (ubi1:0): background thread "ubifs_bgt1_0" started, PID 699
[   95.529713] UBIFS (ubi1:0): UBIFS: mounted UBI device 1, volume 0, name "test2"
[   95.529718] UBIFS (ubi1:0): LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes
[   95.529724] UBIFS (ubi1:0): FS size: 19808256 bytes (18 MiB, 156 LEBs), journal size 1015809 bytes (0 MiB, 8 LEBs)
[   95.529727] UBIFS (ubi1:0): reserved for root: 935592 bytes (913 KiB)
[   95.529733] UBIFS (ubi1:0): media format: w4/r0 (latest is w4/r0), UUID EEB7779D-F419-4CA9-811B-831CAC7233D4, small LPT model

[  954.264767] UBIFS error (ubi1:0 pid 756): ubifs_read_node: bad node type (255 but expected 6)
[  954.367030] UBIFS error (ubi1:0 pid 756): ubifs_read_node: bad node at LEB 0:0, LEB mapping status 1

Signed-off-by: Sheng Yong <shengyong1@huawei.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>

1 files changed, 15 insertions, 11 deletions

diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index 2911d2d23456..de759022f3d6 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -43,15 +43,19 @@
 #define UBIFS_VERSION 1
 
 /* Normal UBIFS messages */
-#define ubifs_msg(fmt, ...) pr_notice("UBIFS: " fmt "\n", ##__VA_ARGS__)
+#define ubifs_msg(c, fmt, ...)                                      \
+        pr_notice("UBIFS (ubi%d:%d): " fmt "\n",                    \
+                  (c)->vi.ubi_num, (c)->vi.vol_id, ##__VA_ARGS__)
 /* UBIFS error messages */
-#define ubifs_err(fmt, ...)                                         \
-        pr_err("UBIFS error (pid %d): %s: " fmt "\n", current->pid, \
+#define ubifs_err(c, fmt, ...)                                      \
+        pr_err("UBIFS error (ubi%d:%d pid %d): %s: " fmt "\n",      \
+               (c)->vi.ubi_num, (c)->vi.vol_id, current->pid,       \
                __func__, ##__VA_ARGS__)
 /* UBIFS warning messages */
-#define ubifs_warn(fmt, ...)                                        \
-        pr_warn("UBIFS warning (pid %d): %s: " fmt "\n",            \
-                current->pid, __func__, ##__VA_ARGS__)
+#define ubifs_warn(c, fmt, ...)                                     \
+        pr_warn("UBIFS warning (ubi%d:%d pid %d): %s: " fmt "\n",   \
+                (c)->vi.ubi_num, (c)->vi.vol_id, current->pid,      \
+                __func__, ##__VA_ARGS__)
 /*
  * A variant of 'ubifs_err()' which takes the UBIFS file-sytem description
  * object as an argument.
@@ -59,7 +63,7 @@
 #define ubifs_errc(c, fmt, ...)                                     \
         do {                                                        \
                 if (!(c)->probing)                                  \
-                        ubifs_err(fmt, ##__VA_ARGS__);              \
+                        ubifs_err(c, fmt, ##__VA_ARGS__);           \
         } while (0)
 
 /* UBIFS file system VFS magic number */
@@ -1787,10 +1791,10 @@ long ubifs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
 /* compressor.c */
 int __init ubifs_compressors_init(void);
 void ubifs_compressors_exit(void);
-void ubifs_compress(const void *in_buf, int in_len, void *out_buf, int *out_len,
-                    int *compr_type);
-int ubifs_decompress(const void *buf, int len, void *out, int *out_len,
-                     int compr_type);
+void ubifs_compress(const struct ubifs_info *c, const void *in_buf, int in_len,
+                    void *out_buf, int *out_len, int *compr_type);
+int ubifs_decompress(const struct ubifs_info *c, const void *buf, int len,
+                     void *out, int *out_len, int compr_type);
 
 #include "debug.h"
 #include "misc.h"