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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/ext2
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/ext2')
-rw-r--r--fs/ext2/super.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index a4dfffac5967..a6c4d6e02324 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -39,7 +39,7 @@
39static void ext2_sync_super(struct super_block *sb, 39static void ext2_sync_super(struct super_block *sb,
40 struct ext2_super_block *es); 40 struct ext2_super_block *es);
41static int ext2_remount (struct super_block * sb, int * flags, char * data); 41static int ext2_remount (struct super_block * sb, int * flags, char * data);
42static int ext2_statfs (struct super_block * sb, struct kstatfs * buf); 42static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf);
43 43
44void ext2_error (struct super_block * sb, const char * function, 44void ext2_error (struct super_block * sb, const char * function,
45 const char * fmt, ...) 45 const char * fmt, ...)
@@ -1038,8 +1038,9 @@ restore_opts:
1038 return err; 1038 return err;
1039} 1039}
1040 1040
1041static int ext2_statfs (struct super_block * sb, struct kstatfs * buf) 1041static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf)
1042{ 1042{
1043 struct super_block *sb = dentry->d_sb;
1043 struct ext2_sb_info *sbi = EXT2_SB(sb); 1044 struct ext2_sb_info *sbi = EXT2_SB(sb);
1044 unsigned long overhead; 1045 unsigned long overhead;
1045 int i; 1046 int i;