Commit 9d03632e authored by David Woodhouse's avatar David Woodhouse Committed by Chris Mason
Browse files

Fill f_fsid field in btrfs_statfs() 



Date: Mon, 18 Aug 2008 12:01:52 +0100
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent f2322b1c

fs/btrfs/super.c

+6 −0
Original line number Diff line number Diff line
@@ -489,6 +489,7 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf) 
	struct btrfs_root *root = btrfs_sb(dentry->d_sb);

	struct btrfs_super_block *disk_super = &root->fs_info->super_copy;

	int bits = dentry->d_sb->s_blocksize_bits;

	__be32 *fsid = (__be32 *)root->fs_info->fsid;



	buf->f_namelen = BTRFS_NAME_LEN;

	buf->f_blocks = btrfs_super_total_bytes(disk_super) >> bits;
@@ -497,6 +498,11 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf) 
	buf->f_bavail = buf->f_bfree;

	buf->f_bsize = dentry->d_sb->s_blocksize;

	buf->f_type = BTRFS_SUPER_MAGIC;

	/* We treat it as constant endianness (it doesn't matter _which_)

	   because we want the fsid to come out the same whether mounted 

	   on a big-endian or little-endian host */

	buf->f_fsid.val[0] = be32_to_cpu(fsid[0]) ^ be32_to_cpu(fsid[2]);

	buf->f_fsid.val[1] = be32_to_cpu(fsid[1]) ^ be32_to_cpu(fsid[3]);

	return 0;

}