From 587c0a42552a69a58e7ccd363d30fd48d809fdcb Mon Sep 17 00:00:00 2001 From: Taehee Yoo Date: Tue, 21 Apr 2015 15:59:12 +0900 Subject: [PATCH] f2fs: add offset check routine before punch_hole() in f2fs_fallocate() In the punch_hole(), if offset bigger than inode size, it returns SUCCESS. Then f2fs_fallocate() will update time and dirty mark. In that case, inode has not been modified actually. So I have added offset check routine that prevent to call the punch_hole(). Signed-off-by: Taehee Yoo Signed-off-by: Jaegeuk Kim --- fs/f2fs/file.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 2b52e48..3d6de54 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -718,10 +718,6 @@ static int punch_hole(struct inode *inode, loff_t offset, loff_t len) if (!S_ISREG(inode->i_mode)) return -EOPNOTSUPP; - /* skip punching hole beyond i_size */ - if (offset >= inode->i_size) - return ret; - if (f2fs_has_inline_data(inode)) { ret = f2fs_convert_inline_inode(inode); if (ret) @@ -830,15 +826,19 @@ static long f2fs_fallocate(struct file *file, int mode, loff_t offset, loff_t len) { struct inode *inode = file_inode(file); - long ret; + long ret = 0; if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) return -EOPNOTSUPP; mutex_lock(&inode->i_mutex); - if (mode & FALLOC_FL_PUNCH_HOLE) + if (mode & FALLOC_FL_PUNCH_HOLE) { + if (offset >= inode->i_size) + goto out; + ret = punch_hole(inode, offset, len); + } else ret = expand_inode_data(inode, offset, len, mode); @@ -847,6 +847,7 @@ static long f2fs_fallocate(struct file *file, int mode, mark_inode_dirty(inode); } +out: mutex_unlock(&inode->i_mutex); trace_f2fs_fallocate(inode, mode, offset, len, ret); -- 2.7.4