lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[PATCH] VFS: Permit filesystem to perform statfs with a known root dentry

Browse Source 
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>
This commit is contained in:
David Howells
2006-06-23 02:02:58 -07:00
committed by Linus Torvalds
parent 454e2398be
commit 726c334223
60 changed files with 175 additions and 144 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
fs/fat/inode.c
View File

@@ -539,18 +539,18 @@ static int fat_remount(struct super_block *sb, int *flags, char *data)
return 0;
}
static int fat_statfs(struct super_block *sb, struct kstatfs *buf)
static int fat_statfs(struct dentry *dentry, struct kstatfs *buf)
{
struct msdos_sb_info *sbi = MSDOS_SB(sb);
struct msdos_sb_info *sbi = MSDOS_SB(dentry->d_sb);
/* If the count of free cluster is still unknown, counts it here. */
if (sbi->free_clusters == -1) {
int err = fat_count_free_clusters(sb);
int err = fat_count_free_clusters(dentry->d_sb);
if (err)
return err;
}
buf->f_type = sb->s_magic;
buf->f_type = dentry->d_sb->s_magic;
buf->f_bsize = sbi->cluster_size;
buf->f_blocks = sbi->max_cluster - FAT_START_ENT;
buf->f_bfree = sbi->free_clusters;