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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/ext3/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/ext3/super.c')
-rw-r--r--fs/ext3/super.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 657f8e73b62f..e08b6439617c 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -58,7 +58,7 @@ static int ext3_sync_fs(struct super_block *sb, int wait);
58static const char *ext3_decode_error(struct super_block * sb, int errno, 58static const char *ext3_decode_error(struct super_block * sb, int errno,
59 char nbuf[16]); 59 char nbuf[16]);
60static int ext3_remount (struct super_block * sb, int * flags, char * data); 60static int ext3_remount (struct super_block * sb, int * flags, char * data);
61static int ext3_statfs (struct super_block * sb, struct kstatfs * buf); 61static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf);
62static void ext3_unlockfs(struct super_block *sb); 62static void ext3_unlockfs(struct super_block *sb);
63static void ext3_write_super (struct super_block * sb); 63static void ext3_write_super (struct super_block * sb);
64static void ext3_write_super_lockfs(struct super_block *sb); 64static void ext3_write_super_lockfs(struct super_block *sb);
@@ -2318,8 +2318,9 @@ restore_opts:
2318 return err; 2318 return err;
2319} 2319}
2320 2320
2321static int ext3_statfs (struct super_block * sb, struct kstatfs * buf) 2321static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf)
2322{ 2322{
2323 struct super_block *sb = dentry->d_sb;
2323 struct ext3_sb_info *sbi = EXT3_SB(sb); 2324 struct ext3_sb_info *sbi = EXT3_SB(sb);
2324 struct ext3_super_block *es = sbi->s_es; 2325 struct ext3_super_block *es = sbi->s_es;
2325 unsigned long overhead; 2326 unsigned long overhead;