From 9d03632e26e1a0a9e4a632cf426a7c0566768a7d Mon Sep 17 00:00:00 2001 From: David Woodhouse Date: Mon, 18 Aug 2008 12:01:52 +0100 Subject: [PATCH] Fill f_fsid field in btrfs_statfs() Date: Mon, 18 Aug 2008 12:01:52 +0100 Signed-off-by: David Woodhouse Signed-off-by: Chris Mason --- fs/btrfs/super.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index e830e0ed409a..6446ab73f35a 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -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; } -- 2.20.1