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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/fat/inode.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/fat/inode.c')
-rw-r--r--fs/fat/inode.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index c1ce284f8a94..7c35d582ec10 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -539,18 +539,18 @@ static int fat_remount(struct super_block *sb, int *flags, char *data)
539 return 0; 539 return 0;
540} 540}
541 541
542static int fat_statfs(struct super_block *sb, struct kstatfs *buf) 542static int fat_statfs(struct dentry *dentry, struct kstatfs *buf)
543{ 543{
544 struct msdos_sb_info *sbi = MSDOS_SB(sb); 544 struct msdos_sb_info *sbi = MSDOS_SB(dentry->d_sb);
545 545
546 /* If the count of free cluster is still unknown, counts it here. */ 546 /* If the count of free cluster is still unknown, counts it here. */
547 if (sbi->free_clusters == -1) { 547 if (sbi->free_clusters == -1) {
548 int err = fat_count_free_clusters(sb); 548 int err = fat_count_free_clusters(dentry->d_sb);
549 if (err) 549 if (err)
550 return err; 550 return err;
551 } 551 }
552 552
553 buf->f_type = sb->s_magic; 553 buf->f_type = dentry->d_sb->s_magic;
554 buf->f_bsize = sbi->cluster_size; 554 buf->f_bsize = sbi->cluster_size;
555 buf->f_blocks = sbi->max_cluster - FAT_START_ENT; 555 buf->f_blocks = sbi->max_cluster - FAT_START_ENT;
556 buf->f_bfree = sbi->free_clusters; 556 buf->f_bfree = sbi->free_clusters;