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| author | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2016-08-02 14:05:02 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-08-02 19:35:16 -0400 |
| commit | a66dfb0a91c211c77b5d4e503d3e760e2e566189 (patch) | |
| tree | dfb792395b32499bd1c9e7175e103a5b1c693bb0 | |
| parent | cae3d4ca6fd6872d8e9c21eff0e56398c938100a (diff) | |
| download | lwn-a66dfb0a91c211c77b5d4e503d3e760e2e566189.tar.gz lwn-a66dfb0a91c211c77b5d4e503d3e760e2e566189.zip | |
nilfs2: add nilfs_msg() message interface
Define an own output routine to replace bare use of printk() function.
The output routine is implemented with a macro and a helper function,
which are named nilfs_msg() and __nilfs_msg(), respectively.
__nilfs_msg() formats a message like "NILFS (<device-name>): <message>",
prefixing it with a given log level, and terminates the statement with a
newline. The "device-name" is optional to make it available in early
stages; it will be omitted if a NULL pointer is passed to super block
instance argument. nilfs_msg() wraps __nilfs_msg() and is removed if
CONFIG_PRINTK is not set.
Link: http://lkml.kernel.org/r/1464875891-5443-3-git-send-email-konishi.ryusuke@lab.ntt.co.jp
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/nilfs2/nilfs.h | 7 | ||||
| -rw-r--r-- | fs/nilfs2/super.c | 16 |
2 files changed, 23 insertions, 0 deletions
diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h index e482c78bcc86..b57ce41e8a1a 100644 --- a/fs/nilfs2/nilfs.h +++ b/fs/nilfs2/nilfs.h @@ -301,6 +301,9 @@ extern struct inode *nilfs_alloc_inode(struct super_block *); extern void nilfs_destroy_inode(struct inode *); extern __printf(3, 4) +void __nilfs_msg(struct super_block *sb, const char *level, + const char *fmt, ...); +extern __printf(3, 4) void __nilfs_error(struct super_block *sb, const char *function, const char *fmt, ...); extern __printf(3, 4) @@ -308,11 +311,15 @@ void nilfs_warning(struct super_block *, const char *, const char *, ...); #ifdef CONFIG_PRINTK +#define nilfs_msg(sb, level, fmt, ...) \ + __nilfs_msg(sb, level, fmt, ##__VA_ARGS__) #define nilfs_error(sb, fmt, ...) \ __nilfs_error(sb, __func__, fmt, ##__VA_ARGS__) #else +#define nilfs_msg(sb, level, fmt, ...) \ + no_printk(fmt, ##__VA_ARGS__) #define nilfs_error(sb, fmt, ...) \ do { \ no_printk(fmt, ##__VA_ARGS__); \ diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c index 7fe497eb2181..86e3c00994e2 100644 --- a/fs/nilfs2/super.c +++ b/fs/nilfs2/super.c @@ -71,6 +71,22 @@ struct kmem_cache *nilfs_btree_path_cache; static int nilfs_setup_super(struct super_block *sb, int is_mount); static int nilfs_remount(struct super_block *sb, int *flags, char *data); +void __nilfs_msg(struct super_block *sb, const char *level, const char *fmt, + ...) +{ + struct va_format vaf; + va_list args; + + va_start(args, fmt); + vaf.fmt = fmt; + vaf.va = &args; + if (sb) + printk("%sNILFS (%s): %pV\n", level, sb->s_id, &vaf); + else + printk("%sNILFS: %pV\n", level, &vaf); + va_end(args); +} + static void nilfs_set_error(struct super_block *sb) { struct the_nilfs *nilfs = sb->s_fs_info; |