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authorDavid Howells <dhowells@redhat.com>2006-06-23 05:02:58 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-23 10:42:45 -0400
commit726c334223180e3c0197cc980a432681370d4baf (patch)
tree8327b354bb3dc959a6606051ae6f8d4d035e38a2 /fs/affs/super.c
parent454e2398be9b9fa30433fccc548db34d19aa9958 (diff)
[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry
Give the statfs superblock operation a dentry pointer rather than a superblock pointer. This complements the get_sb() patch. That reduced the significance of sb->s_root, allowing NFS to place a fake root there. However, NFS does require a dentry to use as a target for the statfs operation. This permits the root in the vfsmount to be used instead. linux/mount.h has been added where necessary to make allyesconfig build successfully. Interest has also been expressed for use with the FUSE and XFS filesystems. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Cc: Nathan Scott <nathans@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/affs/super.c')
-rw-r--r--fs/affs/super.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/affs/super.c b/fs/affs/super.c
index 6a52e7875403..8765cba35bb9 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -18,7 +18,7 @@
18 18
19extern struct timezone sys_tz; 19extern struct timezone sys_tz;
20 20
21static int affs_statfs(struct super_block *sb, struct kstatfs *buf); 21static int affs_statfs(struct dentry *dentry, struct kstatfs *buf);
22static int affs_remount (struct super_block *sb, int *flags, char *data); 22static int affs_remount (struct super_block *sb, int *flags, char *data);
23 23
24static void 24static void
@@ -508,8 +508,9 @@ affs_remount(struct super_block *sb, int *flags, char *data)
508} 508}
509 509
510static int 510static int
511affs_statfs(struct super_block *sb, struct kstatfs *buf) 511affs_statfs(struct dentry *dentry, struct kstatfs *buf)
512{ 512{
513 struct super_block *sb = dentry->d_sb;
513 int free; 514 int free;
514 515
515 pr_debug("AFFS: statfs() partsize=%d, reserved=%d\n",AFFS_SB(sb)->s_partition_size, 516 pr_debug("AFFS: statfs() partsize=%d, reserved=%d\n",AFFS_SB(sb)->s_partition_size,