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f2fs: use inode mutex to keep atomicity of f2fs_falloc 

Previously without protection of inode mutex, f2fs_falloc and other data
correlated operations will interfere with each other.
So let's use inode mutex to keep atomicity of f2fs_falloc.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
This commit is contained in:
Chao Yu 2014-01-28 10:29:26 +08:00 committed by Jaegeuk Kim
parent 1fe54f9dd3
commit 3375f696bd
1 changed files with 5 additions and 0 deletions
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5
fs/f2fs/file.c
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@ -560,6 +560,8 @@ static long f2fs_fallocate(struct file *file, int mode,
if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
return -EOPNOTSUPP;
mutex_lock(&inode->i_mutex);
if (mode & FALLOC_FL_PUNCH_HOLE)
ret = punch_hole(inode, offset, len);
else
@ -569,6 +571,9 @@ static long f2fs_fallocate(struct file *file, int mode,
inode->i_mtime = inode->i_ctime = CURRENT_TIME;
mark_inode_dirty(inode);
}
mutex_unlock(&inode->i_mutex);
trace_f2fs_fallocate(inode, mode, offset, len, ret);
return ret;
}