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Commit 05dadc09 authored by Tsutomu Itoh's avatar Tsutomu Itoh Committed by Chris Mason
Browse files

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: default avatarTsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: default avatarChris Mason <chris.mason@fusionio.com>
parent 01e6deb2

fs/btrfs/inode.c

+8 −0
Original line number Diff line number Diff line
@@ -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);

}