[PATCH 16/20] fs/romfs: return f_fsid for statfs(2)

[PATCH 16/20] fs/romfs: return f_fsid for statfs(2)

[Coly Li]

This patch makes romfs return f_fsid info for statfs(2).

Signed-off-by: Coly Li <coly.li@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
---
 fs/romfs/inode.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/fs/romfs/inode.c b/fs/romfs/inode.c
index 98a232f..9d84e3c 100644
--- a/fs/romfs/inode.c
+++ b/fs/romfs/inode.c
@@ -186,11 +186,17 @@ outnobh:
 static int
 romfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+	struct super_block *sb = dentry->d_sb;
+	u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
+
 	buf->f_type = ROMFS_MAGIC;
 	buf->f_bsize = ROMBSIZE;
 	buf->f_bfree = buf->f_bavail = buf->f_ffree;
 	buf->f_blocks = (romfs_maxsize(dentry->d_sb)+ROMBSIZE-1)>>ROMBSBITS;
 	buf->f_namelen = ROMFS_MAXFN;
+	buf->f_fsid.val[0] = (u32)id;
+	buf->f_fsid.val[1] = (u32)(id >> 32);
+
 	return 0;
 }

-- 
Coly Li
SuSE Labs