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Btrfs: add fiemap's flag check 

When the flag not supported is specified, it is necessary to return the error
to the caller.
So, we add the validity check of the fiemap's flag.

Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
This commit is contained in:
Tsutomu Itoh 2012-11-29 05:08:26 +00:00 committed by Chris Mason
parent 01e6deb25a
commit 05dadc09f5
1 changed files with 8 additions and 0 deletions
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8
fs/btrfs/inode.c
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@ -6595,9 +6595,17 @@ static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb,
btrfs_submit_direct, 0);
}
#define BTRFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC)
static int btrfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
__u64 start, __u64 len)
{
int ret;
ret = fiemap_check_flags(fieinfo, BTRFS_FIEMAP_FLAGS);
if (ret)
return ret;
return extent_fiemap(inode, fieinfo, start, len, btrfs_get_extent_fiemap);
}