[PATCH 2/2] UBIFS: switch to dynamic printks
Artem Bityutskiy
dedekind1 at gmail.com
Mon May 23 02:25:45 EDT 2011
From: Artem Bityutskiy <Artem.Bityutskiy at nokia.com>
Switch to debugging using dynamic printk (pr_debug()). There is no good reason
to carry custom debugging prints if there is so cool and powerful generic
dynamic printk infrastructure, see Documentation/dynamic-debug-howto.txt. With
dynamic printks we can switch on/of individual prints, per-file, per-function
and per format messages. This means that instead of doing old-fashioned
echo 1 > /sys/module/ubifs/parameters/debug_msgs
to enable general messages, we can do:
echo 'format "UBIFS DBG gen" +ptlf' > control
to enable general messages and additionally ask the dynamic printk
infrastructure to print process ID, line number and function name. So there is
no reason to keep UBIFS-specific crud if there is more powerful generic thing.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy at nokia.com>
---
Documentation/filesystems/ubifs.txt | 25 +------
fs/ubifs/debug.c | 3 -
fs/ubifs/debug.h | 132 +++++++++++------------------------
3 files changed, 43 insertions(+), 117 deletions(-)
diff --git a/Documentation/filesystems/ubifs.txt b/Documentation/filesystems/ubifs.txt
index 7d17e5b..8e4fab6 100644
--- a/Documentation/filesystems/ubifs.txt
+++ b/Documentation/filesystems/ubifs.txt
@@ -115,28 +115,8 @@ ubi.mtd=0 root=ubi0:rootfs rootfstype=ubifs
Module Parameters for Debugging
===============================
-When UBIFS has been compiled with debugging enabled, there are 3 module
+When UBIFS has been compiled with debugging enabled, there are 2 module
parameters that are available to control aspects of testing and debugging.
-The parameters are unsigned integers where each bit controls an option.
-The parameters are:
-
-debug_msgs Selects which debug messages to display, as follows:
-
- Message Type Flag value
-
- General messages 1
- Journal messages 2
- Mount messages 4
- Commit messages 8
- LEB search messages 16
- Budgeting messages 32
- Garbage collection messages 64
- Tree Node Cache (TNC) messages 128
- LEB properties (lprops) messages 256
- Input/output messages 512
- Log messages 1024
- Scan messages 2048
- Recovery messages 4096
debug_chks Selects extra checks that UBIFS can do while running:
@@ -156,8 +136,7 @@ debug_tsts Selects a mode of testing, as follows:
Failure mode for recovery testing 4
-For example, set debug_msgs to 5 to display General messages and Mount
-messages.
+For example, set debug_chks to 3 to enable general and TNC checks.
References
diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c
index f46d77e..0bb2bce 100644
--- a/fs/ubifs/debug.c
+++ b/fs/ubifs/debug.c
@@ -42,15 +42,12 @@ DEFINE_SPINLOCK(dbg_lock);
static char dbg_key_buf0[128];
static char dbg_key_buf1[128];
-unsigned int ubifs_msg_flags;
unsigned int ubifs_chk_flags;
unsigned int ubifs_tst_flags;
-module_param_named(debug_msgs, ubifs_msg_flags, uint, S_IRUGO | S_IWUSR);
module_param_named(debug_chks, ubifs_chk_flags, uint, S_IRUGO | S_IWUSR);
module_param_named(debug_tsts, ubifs_tst_flags, uint, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(debug_msgs, "Debug message type flags");
MODULE_PARM_DESC(debug_chks, "Debug check flags");
MODULE_PARM_DESC(debug_tsts, "Debug special test flags");
diff --git a/fs/ubifs/debug.h b/fs/ubifs/debug.h
index 7538bf2..a811ac4 100644
--- a/fs/ubifs/debug.h
+++ b/fs/ubifs/debug.h
@@ -109,19 +109,6 @@ struct ubifs_debug_info {
#define dbg_dump_stack() dump_stack()
-/* Generic debugging messages */
-#define dbg_msg(fmt, ...) do { \
- spin_lock(&dbg_lock); \
- printk(KERN_DEBUG "UBIFS DBG (pid %d): %s: " fmt "\n", current->pid, \
- __func__, ##__VA_ARGS__); \
- spin_unlock(&dbg_lock); \
-} while (0)
-
-#define dbg_do_msg(typ, fmt, ...) do { \
- if (ubifs_msg_flags & typ) \
- dbg_msg(fmt, ##__VA_ARGS__); \
-} while (0)
-
#define dbg_err(fmt, ...) do { \
spin_lock(&dbg_lock); \
ubifs_err(fmt, ##__VA_ARGS__); \
@@ -140,77 +127,40 @@ const char *dbg_key_str1(const struct ubifs_info *c,
#define DBGKEY(key) dbg_key_str0(c, (key))
#define DBGKEY1(key) dbg_key_str1(c, (key))
-/* General messages */
-#define dbg_gen(fmt, ...) dbg_do_msg(UBIFS_MSG_GEN, fmt, ##__VA_ARGS__)
+#define ubifs_dbg_msg(type, fmt, ...) do { \
+ spin_lock(&dbg_lock); \
+ pr_debug("UBIFS DBG " type ": " fmt "\n", ##__VA_ARGS__); \
+ spin_unlock(&dbg_lock); \
+} while (0)
+/* Just a debugging messages not related to any specific UBIFS subsystem */
+#define dbg_msg(fmt, ...) ubifs_dbg_msg("msg", fmt, ##__VA_ARGS__)
+/* General messages */
+#define dbg_gen(fmt, ...) ubifs_dbg_msg("gen", fmt, ##__VA_ARGS__)
/* Additional journal messages */
-#define dbg_jnl(fmt, ...) dbg_do_msg(UBIFS_MSG_JNL, fmt, ##__VA_ARGS__)
-
+#define dbg_jnl(fmt, ...) ubifs_dbg_msg("jnl", fmt, ##__VA_ARGS__)
/* Additional TNC messages */
-#define dbg_tnc(fmt, ...) dbg_do_msg(UBIFS_MSG_TNC, fmt, ##__VA_ARGS__)
-
+#define dbg_tnc(fmt, ...) ubifs_dbg_msg("tnc", fmt, ##__VA_ARGS__)
/* Additional lprops messages */
-#define dbg_lp(fmt, ...) dbg_do_msg(UBIFS_MSG_LP, fmt, ##__VA_ARGS__)
-
+#define dbg_lp(fmt, ...) ubifs_dbg_msg("lp", fmt, ##__VA_ARGS__)
/* Additional LEB find messages */
-#define dbg_find(fmt, ...) dbg_do_msg(UBIFS_MSG_FIND, fmt, ##__VA_ARGS__)
-
+#define dbg_find(fmt, ...) ubifs_dbg_msg("find", fmt, ##__VA_ARGS__)
/* Additional mount messages */
-#define dbg_mnt(fmt, ...) dbg_do_msg(UBIFS_MSG_MNT, fmt, ##__VA_ARGS__)
-
+#define dbg_mnt(fmt, ...) ubifs_dbg_msg("mnt", fmt, ##__VA_ARGS__)
/* Additional I/O messages */
-#define dbg_io(fmt, ...) dbg_do_msg(UBIFS_MSG_IO, fmt, ##__VA_ARGS__)
-
+#define dbg_io(fmt, ...) ubifs_dbg_msg("io", fmt, ##__VA_ARGS__)
/* Additional commit messages */
-#define dbg_cmt(fmt, ...) dbg_do_msg(UBIFS_MSG_CMT, fmt, ##__VA_ARGS__)
-
+#define dbg_cmt(fmt, ...) ubifs_dbg_msg("cmt", fmt, ##__VA_ARGS__)
/* Additional budgeting messages */
-#define dbg_budg(fmt, ...) dbg_do_msg(UBIFS_MSG_BUDG, fmt, ##__VA_ARGS__)
-
+#define dbg_budg(fmt, ...) ubifs_dbg_msg("budg", fmt, ##__VA_ARGS__)
/* Additional log messages */
-#define dbg_log(fmt, ...) dbg_do_msg(UBIFS_MSG_LOG, fmt, ##__VA_ARGS__)
-
+#define dbg_log(fmt, ...) ubifs_dbg_msg("log", fmt, ##__VA_ARGS__)
/* Additional gc messages */
-#define dbg_gc(fmt, ...) dbg_do_msg(UBIFS_MSG_GC, fmt, ##__VA_ARGS__)
-
+#define dbg_gc(fmt, ...) ubifs_dbg_msg("gc", fmt, ##__VA_ARGS__)
/* Additional scan messages */
-#define dbg_scan(fmt, ...) dbg_do_msg(UBIFS_MSG_SCAN, fmt, ##__VA_ARGS__)
-
+#define dbg_scan(fmt, ...) ubifs_dbg_msg("scan", fmt, ##__VA_ARGS__)
/* Additional recovery messages */
-#define dbg_rcvry(fmt, ...) dbg_do_msg(UBIFS_MSG_RCVRY, fmt, ##__VA_ARGS__)
-
-/*
- * Debugging message type flags.
- *
- * UBIFS_MSG_GEN: general messages
- * UBIFS_MSG_JNL: journal messages
- * UBIFS_MSG_MNT: mount messages
- * UBIFS_MSG_CMT: commit messages
- * UBIFS_MSG_FIND: LEB find messages
- * UBIFS_MSG_BUDG: budgeting messages
- * UBIFS_MSG_GC: garbage collection messages
- * UBIFS_MSG_TNC: TNC messages
- * UBIFS_MSG_LP: lprops messages
- * UBIFS_MSG_IO: I/O messages
- * UBIFS_MSG_LOG: log messages
- * UBIFS_MSG_SCAN: scan messages
- * UBIFS_MSG_RCVRY: recovery messages
- */
-enum {
- UBIFS_MSG_GEN = 0x1,
- UBIFS_MSG_JNL = 0x2,
- UBIFS_MSG_MNT = 0x4,
- UBIFS_MSG_CMT = 0x8,
- UBIFS_MSG_FIND = 0x10,
- UBIFS_MSG_BUDG = 0x20,
- UBIFS_MSG_GC = 0x40,
- UBIFS_MSG_TNC = 0x80,
- UBIFS_MSG_LP = 0x100,
- UBIFS_MSG_IO = 0x200,
- UBIFS_MSG_LOG = 0x400,
- UBIFS_MSG_SCAN = 0x800,
- UBIFS_MSG_RCVRY = 0x1000,
-};
+#define dbg_rcvry(fmt, ...) ubifs_dbg_msg("rcvry", fmt, ##__VA_ARGS__)
/*
* Debugging check flags.
@@ -368,33 +318,33 @@ void dbg_debugfs_exit_fs(struct ubifs_info *c);
__func__, __LINE__, current->pid); \
} while (0)
-#define dbg_err(fmt, ...) do { \
- if (0) \
- ubifs_err(fmt, ##__VA_ARGS__); \
+#define dbg_err(fmt, ...) do { \
+ if (0) \
+ ubifs_err(fmt, ##__VA_ARGS__); \
} while (0)
-#define dbg_msg(fmt, ...) do { \
- if (0) \
- printk(KERN_DEBUG "UBIFS DBG (pid %d): %s: " fmt "\n", \
- current->pid, __func__, ##__VA_ARGS__); \
+#define ubifs_dbg_msg(fmt, ...) do { \
+ if (0) \
+ pr_debug(fmt "\n", ##__VA_ARGS__); \
} while (0)
#define dbg_dump_stack()
#define ubifs_assert_cmt_locked(c)
-#define dbg_gen(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
-#define dbg_jnl(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
-#define dbg_tnc(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
-#define dbg_lp(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
-#define dbg_find(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
-#define dbg_mnt(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
-#define dbg_io(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
-#define dbg_cmt(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
-#define dbg_budg(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
-#define dbg_log(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
-#define dbg_gc(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
-#define dbg_scan(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
-#define dbg_rcvry(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
+#define dbg_msg(fmt, ...) ubifs_dbg_msg(fmt, ##__VA_ARGS__)
+#define dbg_gen(fmt, ...) ubifs_dbg_msg(fmt, ##__VA_ARGS__)
+#define dbg_jnl(fmt, ...) ubifs_dbg_msg(fmt, ##__VA_ARGS__)
+#define dbg_tnc(fmt, ...) ubifs_dbg_msg(fmt, ##__VA_ARGS__)
+#define dbg_lp(fmt, ...) ubifs_dbg_msg(fmt, ##__VA_ARGS__)
+#define dbg_find(fmt, ...) ubifs_dbg_msg(fmt, ##__VA_ARGS__)
+#define dbg_mnt(fmt, ...) ubifs_dbg_msg(fmt, ##__VA_ARGS__)
+#define dbg_io(fmt, ...) ubifs_dbg_msg(fmt, ##__VA_ARGS__)
+#define dbg_cmt(fmt, ...) ubifs_dbg_msg(fmt, ##__VA_ARGS__)
+#define dbg_budg(fmt, ...) ubifs_dbg_msg(fmt, ##__VA_ARGS__)
+#define dbg_log(fmt, ...) ubifs_dbg_msg(fmt, ##__VA_ARGS__)
+#define dbg_gc(fmt, ...) ubifs_dbg_msg(fmt, ##__VA_ARGS__)
+#define dbg_scan(fmt, ...) ubifs_dbg_msg(fmt, ##__VA_ARGS__)
+#define dbg_rcvry(fmt, ...) ubifs_dbg_msg(fmt, ##__VA_ARGS__)
#define DBGKEY(key) ((char *)(key))
#define DBGKEY1(key) ((char *)(key))
--
1.7.2.3
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