[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>

46 files changed, 136 insertions, 110 deletions

diff --git a/fs/adfs/super.c b/fs/adfs/super.c
index 1b58a9b7f6aa..ba1c88af49fe 100644
--- a/fs/adfs/super.c
+++ b/fs/adfs/super.c
@@ -196,17 +196,17 @@ static int adfs_remount(struct super_block *sb, int *flags, char *data)
         return parse_options(sb, data);
 }
 
-static int adfs_statfs(struct super_block *sb, struct kstatfs *buf)
+static int adfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
-        struct adfs_sb_info *asb = ADFS_SB(sb);
+        struct adfs_sb_info *asb = ADFS_SB(dentry->d_sb);
 
         buf->f_type    = ADFS_SUPER_MAGIC;
         buf->f_namelen = asb->s_namelen;
-        buf->f_bsize   = sb->s_blocksize;
+        buf->f_bsize   = dentry->d_sb->s_blocksize;
         buf->f_blocks  = asb->s_size;
         buf->f_files   = asb->s_ids_per_zone * asb->s_map_size;
         buf->f_bavail  =
-        buf->f_bfree   = adfs_map_free(sb);
+        buf->f_bfree   = adfs_map_free(dentry->d_sb);
         buf->f_ffree   = (long)(buf->f_bfree * buf->f_files) / (long)buf->f_blocks;
 
         return 0;
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 @@
 
 extern struct timezone sys_tz;
 
-static int affs_statfs(struct super_block *sb, struct kstatfs *buf);
+static int affs_statfs(struct dentry *dentry, struct kstatfs *buf);
 static int affs_remount (struct super_block *sb, int *flags, char *data);
 
 static void
@@ -508,8 +508,9 @@ affs_remount(struct super_block *sb, int *flags, char *data)
 }
 
 static int
-affs_statfs(struct super_block *sb, struct kstatfs *buf)
+affs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+        struct super_block *sb = dentry->d_sb;
         int              free;
 
         pr_debug("AFFS: statfs() partsize=%d, reserved=%d\n",AFFS_SB(sb)->s_partition_size,
diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index 6ed07a5f10c6..08201fab26cd 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -49,7 +49,7 @@ static int befs_nls2utf(struct super_block *sb, const char *in, int in_len,
                         char **out, int *out_len);
 static void befs_put_super(struct super_block *);
 static int befs_remount(struct super_block *, int *, char *);
-static int befs_statfs(struct super_block *, struct kstatfs *);
+static int befs_statfs(struct dentry *, struct kstatfs *);
 static int parse_options(char *, befs_mount_options *);
 
 static const struct super_operations befs_sops = {
@@ -880,8 +880,9 @@ befs_remount(struct super_block *sb, int *flags, char *data)
 }
 
 static int
-befs_statfs(struct super_block *sb, struct kstatfs *buf)
+befs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+        struct super_block *sb = dentry->d_sb;
 
         befs_debug(sb, "---> befs_statfs()");
 
diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c
index e7da03f63a5a..cf74f3d4d966 100644
--- a/fs/bfs/inode.c
+++ b/fs/bfs/inode.c
@@ -203,8 +203,9 @@ static void bfs_put_super(struct super_block *s)
         s->s_fs_info = NULL;
 }
 
-static int bfs_statfs(struct super_block *s, struct kstatfs *buf)
+static int bfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+        struct super_block *s = dentry->d_sb;
         struct bfs_sb_info *info = BFS_SB(s);
         u64 id = huge_encode_dev(s->s_bdev->bd_dev);
         buf->f_type = BFS_MAGIC;
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 08b35801dfed..7520f4687158 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -166,8 +166,9 @@ cifs_put_super(struct super_block *sb)
 }
 
 static int
-cifs_statfs(struct super_block *sb, struct kstatfs *buf)
+cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+        struct super_block *sb = dentry->d_sb;
         int xid; 
         int rc = -EOPNOTSUPP;
         struct cifs_sb_info *cifs_sb;
diff --git a/fs/coda/inode.c b/fs/coda/inode.c
index cba70201567d..87f1dc8aa24b 100644
--- a/fs/coda/inode.c
+++ b/fs/coda/inode.c
@@ -36,7 +36,7 @@
 /* VFS super_block ops */
 static void coda_clear_inode(struct inode *);
 static void coda_put_super(struct super_block *);
-static int coda_statfs(struct super_block *sb, struct kstatfs *buf);
+static int coda_statfs(struct dentry *dentry, struct kstatfs *buf);
 
 static kmem_cache_t * coda_inode_cachep;
 
@@ -278,13 +278,13 @@ struct inode_operations coda_file_inode_operations = {
         .setattr        = coda_setattr,
 };
 
-static int coda_statfs(struct super_block *sb, struct kstatfs *buf)
+static int coda_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
         int error;
         
         lock_kernel();
 
-        error = venus_statfs(sb, buf);
+        error = venus_statfs(dentry, buf);
 
         unlock_kernel();
 
diff --git a/fs/coda/upcall.c b/fs/coda/upcall.c
index 1bae99650a91..b040eba13a7d 100644
--- a/fs/coda/upcall.c
+++ b/fs/coda/upcall.c
@@ -611,7 +611,7 @@ int venus_pioctl(struct super_block *sb, struct CodaFid *fid,
         return error;
 }
 
-int venus_statfs(struct super_block *sb, struct kstatfs *sfs) 
+int venus_statfs(struct dentry *dentry, struct kstatfs *sfs)
 { 
         union inputArgs *inp;
         union outputArgs *outp;
@@ -620,7 +620,7 @@ int venus_statfs(struct super_block *sb, struct kstatfs *sfs)
         insize = max_t(unsigned int, INSIZE(statfs), OUTSIZE(statfs));
         UPARG(CODA_STATFS);
 
-        error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
+        error = coda_upcall(coda_sbp(dentry->d_sb), insize, &outsize, inp);
         
         if (!error) {
                 sfs->f_blocks = outp->coda_statfs.stat.f_blocks;
diff --git a/fs/compat.c b/fs/compat.c
index b1f64786a613..7e7e5bc4f3cf 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -197,7 +197,7 @@ asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs
         error = user_path_walk(path, &nd);
         if (!error) {
                 struct kstatfs tmp;
-                error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp);
+                error = vfs_statfs(nd.dentry, &tmp);
                 if (!error)
                         error = put_compat_statfs(buf, &tmp);
                 path_release(&nd);
@@ -215,7 +215,7 @@ asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user
         file = fget(fd);
         if (!file)
                 goto out;
-        error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp);
+        error = vfs_statfs(file->f_dentry, &tmp);
         if (!error)
                 error = put_compat_statfs(buf, &tmp);
         fput(file);
@@ -265,7 +265,7 @@ asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, s
         error = user_path_walk(path, &nd);
         if (!error) {
                 struct kstatfs tmp;
-                error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp);
+                error = vfs_statfs(nd.dentry, &tmp);
                 if (!error)
                         error = put_compat_statfs64(buf, &tmp);
                 path_release(&nd);
@@ -286,7 +286,7 @@ asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct c
         file = fget(fd);
         if (!file)
                 goto out;
-        error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp);
+        error = vfs_statfs(file->f_dentry, &tmp);
         if (!error)
                 error = put_compat_statfs64(buf, &tmp);
         fput(file);
diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index 37a91a153aa5..8a9d5d3b3262 100644
--- a/fs/cramfs/inode.c
+++ b/fs/cramfs/inode.c
@@ -322,8 +322,10 @@ out:
         return -EINVAL;
 }
 
-static int cramfs_statfs(struct super_block *sb, struct kstatfs *buf)
+static int cramfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+        struct super_block *sb = dentry->d_sb;
+
         buf->f_type = CRAMFS_MAGIC;
         buf->f_bsize = PAGE_CACHE_SIZE;
         buf->f_blocks = CRAMFS_SB(sb)->blocks;
diff --git a/fs/efs/super.c b/fs/efs/super.c
index 1ba5e14f879f..8ac2462ae5dd 100644
--- a/fs/efs/super.c
+++ b/fs/efs/super.c
@@ -15,7 +15,7 @@
 #include <linux/buffer_head.h>
 #include <linux/vfs.h>
 
-static int efs_statfs(struct super_block *s, struct kstatfs *buf);
+static int efs_statfs(struct dentry *dentry, struct kstatfs *buf);
 static int efs_fill_super(struct super_block *s, void *d, int silent);
 
 static int efs_get_sb(struct file_system_type *fs_type,
@@ -322,8 +322,8 @@ out_no_fs:
         return -EINVAL;
 }
 
-static int efs_statfs(struct super_block *s, struct kstatfs *buf) {
-        struct efs_sb_info *sb = SUPER_INFO(s);
+static int efs_statfs(struct dentry *dentry, struct kstatfs *buf) {
+        struct efs_sb_info *sb = SUPER_INFO(dentry->d_sb);
 
         buf->f_type    = EFS_SUPER_MAGIC;       /* efs magic number */
         buf->f_bsize   = EFS_BLOCKSIZE;         /* blocksize */
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 @@
 static void ext2_sync_super(struct super_block *sb,
                             struct ext2_super_block *es);
 static int ext2_remount (struct super_block * sb, int * flags, char * data);
-static int ext2_statfs (struct super_block * sb, struct kstatfs * buf);
+static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf);
 
 void ext2_error (struct super_block * sb, const char * function,
                  const char * fmt, ...)
@@ -1038,8 +1038,9 @@ restore_opts:
         return err;
 }
 
-static int ext2_statfs (struct super_block * sb, struct kstatfs * buf)
+static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf)
 {
+        struct super_block *sb = dentry->d_sb;
         struct ext2_sb_info *sbi = EXT2_SB(sb);
         unsigned long overhead;
         int i;
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);
 static const char *ext3_decode_error(struct super_block * sb, int errno,
                                      char nbuf[16]);
 static int ext3_remount (struct super_block * sb, int * flags, char * data);
-static int ext3_statfs (struct super_block * sb, struct kstatfs * buf);
+static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf);
 static void ext3_unlockfs(struct super_block *sb);
 static void ext3_write_super (struct super_block * sb);
 static void ext3_write_super_lockfs(struct super_block *sb);
@@ -2318,8 +2318,9 @@ restore_opts:
         return err;
 }
 
-static int ext3_statfs (struct super_block * sb, struct kstatfs * buf)
+static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf)
 {
+        struct super_block *sb = dentry->d_sb;
         struct ext3_sb_info *sbi = EXT3_SB(sb);
         struct ext3_super_block *es = sbi->s_es;
         unsigned long overhead;
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)
         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;
diff --git a/fs/freevxfs/vxfs_super.c b/fs/freevxfs/vxfs_super.c
index d76eeaafbde2..b74b791fc23b 100644
--- a/fs/freevxfs/vxfs_super.c
+++ b/fs/freevxfs/vxfs_super.c
@@ -40,6 +40,7 @@
 #include <linux/slab.h>
 #include <linux/stat.h>
 #include <linux/vfs.h>
+#include <linux/mount.h>
 
 #include "vxfs.h"
 #include "vxfs_extern.h"
@@ -55,7 +56,7 @@ MODULE_ALIAS("vxfs"); /* makes mount -t vxfs autoload the module */
 
 
 static void             vxfs_put_super(struct super_block *);
-static int              vxfs_statfs(struct super_block *, struct kstatfs *);
+static int              vxfs_statfs(struct dentry *, struct kstatfs *);
 static int              vxfs_remount(struct super_block *, int *, char *);
 
 static struct super_operations vxfs_super_ops = {
@@ -90,12 +91,12 @@ vxfs_put_super(struct super_block *sbp)
 
 /**
  * vxfs_statfs - get filesystem information
- * @sbp:        VFS superblock
+ * @dentry:     VFS dentry to locate superblock
  * @bufp:       output buffer
  *
  * Description:
  *   vxfs_statfs fills the statfs buffer @bufp with information
- *   about the filesystem described by @sbp.
+ *   about the filesystem described by @dentry.
  *
  * Returns:
  *   Zero.
@@ -107,12 +108,12 @@ vxfs_put_super(struct super_block *sbp)
  *   This is everything but complete...
  */
 static int
-vxfs_statfs(struct super_block *sbp, struct kstatfs *bufp)
+vxfs_statfs(struct dentry *dentry, struct kstatfs *bufp)
 {
-        struct vxfs_sb_info             *infp = VXFS_SBI(sbp);
+        struct vxfs_sb_info             *infp = VXFS_SBI(dentry->d_sb);
 
         bufp->f_type = VXFS_SUPER_MAGIC;
-        bufp->f_bsize = sbp->s_blocksize;
+        bufp->f_bsize = dentry->d_sb->s_blocksize;
         bufp->f_blocks = infp->vsi_raw->vs_dsize;
         bufp->f_bfree = infp->vsi_raw->vs_free;
         bufp->f_bavail = 0;
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index c91f0a50aadb..a13c0f529058 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -236,8 +236,9 @@ static void convert_fuse_statfs(struct kstatfs *stbuf, struct fuse_kstatfs *attr
         /* fsid is left zero */
 }
 
-static int fuse_statfs(struct super_block *sb, struct kstatfs *buf)
+static int fuse_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+        struct super_block *sb = dentry->d_sb;
         struct fuse_conn *fc = get_fuse_conn_super(sb);
         struct fuse_req *req;
         struct fuse_statfs_out outarg;
diff --git a/fs/hfs/super.c b/fs/hfs/super.c
index ee5b80a409e8..d9227bf14e86 100644
--- a/fs/hfs/super.c
+++ b/fs/hfs/super.c
@@ -80,8 +80,10 @@ static void hfs_put_super(struct super_block *sb)
  *
  * changed f_files/f_ffree to reflect the fs_ablock/free_ablocks.
  */
-static int hfs_statfs(struct super_block *sb, struct kstatfs *buf)
+static int hfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+        struct super_block *sb = dentry->d_sb;
+
         buf->f_type = HFS_SUPER_MAGIC;
         buf->f_bsize = sb->s_blocksize;
         buf->f_blocks = (u32)HFS_SB(sb)->fs_ablocks * HFS_SB(sb)->fs_div;
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index 0ed8b7e8e87f..0a92fa2336a2 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -212,8 +212,10 @@ static void hfsplus_put_super(struct super_block *sb)
         sb->s_fs_info = NULL;
 }
 
-static int hfsplus_statfs(struct super_block *sb, struct kstatfs *buf)
+static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+        struct super_block *sb = dentry->d_sb;
+
         buf->f_type = HFSPLUS_SUPER_MAGIC;
         buf->f_bsize = sb->s_blocksize;
         buf->f_blocks = HFSPLUS_SB(sb).total_blocks << HFSPLUS_SB(sb).fs_shift;
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 04035e08f5c1..8e0d37743e7c 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -239,7 +239,7 @@ static int read_inode(struct inode *ino)
         return(err);
 }
 
-int hostfs_statfs(struct super_block *sb, struct kstatfs *sf)
+int hostfs_statfs(struct dentry *dentry, struct kstatfs *sf)
 {
         /* do_statfs uses struct statfs64 internally, but the linux kernel
          * struct statfs still has 32-bit versions for most of these fields,
@@ -252,7 +252,7 @@ int hostfs_statfs(struct super_block *sb, struct kstatfs *sf)
         long long f_files;
         long long f_ffree;
 
-        err = do_statfs(HOSTFS_I(sb->s_root->d_inode)->host_filename,
+        err = do_statfs(HOSTFS_I(dentry->d_sb->s_root->d_inode)->host_filename,
                         &sf->f_bsize, &f_blocks, &f_bfree, &f_bavail, &f_files,
                         &f_ffree, &sf->f_fsid, sizeof(sf->f_fsid),
                         &sf->f_namelen, sf->f_spare);
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index 3b25cf3e2e65..f798480a363f 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -135,8 +135,9 @@ static unsigned count_bitmaps(struct super_block *s)
         return count;
 }
 
-static int hpfs_statfs(struct super_block *s, struct kstatfs *buf)
+static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+        struct super_block *s = dentry->d_sb;
         struct hpfs_sb_info *sbi = hpfs_sb(s);
         lock_kernel();
 
diff --git a/fs/hppfs/hppfs_kern.c b/fs/hppfs/hppfs_kern.c
index ec43c22bc9c0..3a9bdf58166f 100644
--- a/fs/hppfs/hppfs_kern.c
+++ b/fs/hppfs/hppfs_kern.c
@@ -616,7 +616,7 @@ static const struct file_operations hppfs_dir_fops = {
         .fsync          = hppfs_fsync,
 };
 
-static int hppfs_statfs(struct super_block *sb, struct kstatfs *sf)
+static int hppfs_statfs(struct dentry *dentry, struct kstatfs *sf)
 {
         sf->f_blocks = 0;
         sf->f_bfree = 0;
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 4665c26171f7..678fc72c3646 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -467,9 +467,9 @@ static int hugetlbfs_set_page_dirty(struct page *page)
         return 0;
 }
 
-static int hugetlbfs_statfs(struct super_block *sb, struct kstatfs *buf)
+static int hugetlbfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
-        struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(sb);
+        struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(dentry->d_sb);
 
         buf->f_type = HUGETLBFS_MAGIC;
         buf->f_bsize = HPAGE_SIZE;
diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c
index 17268da63a49..3f9c8ba1fa1f 100644
--- a/fs/isofs/inode.c
+++ b/fs/isofs/inode.c
@@ -56,7 +56,7 @@ static void isofs_put_super(struct super_block *sb)
 }
 
 static void isofs_read_inode(struct inode *);
-static int isofs_statfs (struct super_block *, struct kstatfs *);
+static int isofs_statfs (struct dentry *, struct kstatfs *);
 
 static kmem_cache_t *isofs_inode_cachep;
 
@@ -901,8 +901,10 @@ out_freesbi:
         return -EINVAL;
 }
 
-static int isofs_statfs (struct super_block *sb, struct kstatfs *buf)
+static int isofs_statfs (struct dentry *dentry, struct kstatfs *buf)
 {
+        struct super_block *sb = dentry->d_sb;
+
         buf->f_type = ISOFS_SUPER_MAGIC;
         buf->f_bsize = sb->s_blocksize;
         buf->f_blocks = (ISOFS_SB(sb)->s_nzones
diff --git a/fs/jffs/inode-v23.c b/fs/jffs/inode-v23.c
index dd93a091ad67..9e46ea6da752 100644
--- a/fs/jffs/inode-v23.c
+++ b/fs/jffs/inode-v23.c
@@ -377,9 +377,9 @@ jffs_new_inode(const struct inode * dir, struct jffs_raw_inode *raw_inode,
 
 /* Get statistics of the file system.  */
 static int
-jffs_statfs(struct super_block *sb, struct kstatfs *buf)
+jffs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
-        struct jffs_control *c = (struct jffs_control *) sb->s_fs_info;
+        struct jffs_control *c = (struct jffs_control *) dentry->d_sb->s_fs_info;
         struct jffs_fmcontrol *fmc;
 
         lock_kernel();
diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c
index 7b6c24b14f85..2900ec3ec3af 100644
--- a/fs/jffs2/fs.c
+++ b/fs/jffs2/fs.c
@@ -192,9 +192,9 @@ int jffs2_setattr(struct dentry *dentry, struct iattr *iattr)
         return rc;
 }
 
-int jffs2_statfs(struct super_block *sb, struct kstatfs *buf)
+int jffs2_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
-        struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
+        struct jffs2_sb_info *c = JFFS2_SB_INFO(dentry->d_sb);
         unsigned long avail;
 
         buf->f_type = JFFS2_SUPER_MAGIC;
diff --git a/fs/jffs2/os-linux.h b/fs/jffs2/os-linux.h
index cd4021bcb944..6b5223565405 100644
--- a/fs/jffs2/os-linux.h
+++ b/fs/jffs2/os-linux.h
@@ -175,7 +175,7 @@ void jffs2_clear_inode (struct inode *);
 void jffs2_dirty_inode(struct inode *inode);
 struct inode *jffs2_new_inode (struct inode *dir_i, int mode,
                                struct jffs2_raw_inode *ri);
-int jffs2_statfs (struct super_block *, struct kstatfs *);
+int jffs2_statfs (struct dentry *, struct kstatfs *);
 void jffs2_write_super (struct super_block *);
 int jffs2_remount_fs (struct super_block *, int *, char *);
 int jffs2_do_fill_super(struct super_block *sb, void *data, int silent);
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index 18a28137b90e..73d2aba084c6 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -139,9 +139,9 @@ static void jfs_destroy_inode(struct inode *inode)
         kmem_cache_free(jfs_inode_cachep, ji);
 }
 
-static int jfs_statfs(struct super_block *sb, struct kstatfs *buf)
+static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
-        struct jfs_sb_info *sbi = JFS_SBI(sb);
+        struct jfs_sb_info *sbi = JFS_SBI(dentry->d_sb);
         s64 maxinodes;
         struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap;
 
diff --git a/fs/libfs.c b/fs/libfs.c
index 7d70efa46da9..1b1156381787 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -20,9 +20,9 @@ int simple_getattr(struct vfsmount *mnt, struct dentry *dentry,
         return 0;
 }
 
-int simple_statfs(struct super_block *sb, struct kstatfs *buf)
+int simple_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
-        buf->f_type = sb->s_magic;
+        buf->f_type = dentry->d_sb->s_magic;
         buf->f_bsize = PAGE_CACHE_SIZE;
         buf->f_namelen = NAME_MAX;
         return 0;
diff --git a/fs/minix/inode.c b/fs/minix/inode.c
index 14f24dfbfe30..a6fb509b7341 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -19,7 +19,7 @@
 
 static void minix_read_inode(struct inode * inode);
 static int minix_write_inode(struct inode * inode, int wait);
-static int minix_statfs(struct super_block *sb, struct kstatfs *buf);
+static int minix_statfs(struct dentry *dentry, struct kstatfs *buf);
 static int minix_remount (struct super_block * sb, int * flags, char * data);
 
 static void minix_delete_inode(struct inode *inode)
@@ -296,11 +296,11 @@ out_bad_sb:
         return -EINVAL;
 }
 
-static int minix_statfs(struct super_block *sb, struct kstatfs *buf)
+static int minix_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
-        struct minix_sb_info *sbi = minix_sb(sb);
-        buf->f_type = sb->s_magic;
-        buf->f_bsize = sb->s_blocksize;
+        struct minix_sb_info *sbi = minix_sb(dentry->d_sb);
+        buf->f_type = dentry->d_sb->s_magic;
+        buf->f_bsize = dentry->d_sb->s_blocksize;
         buf->f_blocks = (sbi->s_nzones - sbi->s_firstdatazone) << sbi->s_log_zone_size;
         buf->f_bfree = minix_count_free_blocks(sbi);
         buf->f_bavail = buf->f_bfree;
diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c
index 8db033fab3fd..90d2ea28f333 100644
--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -39,7 +39,7 @@
 
 static void ncp_delete_inode(struct inode *);
 static void ncp_put_super(struct super_block *);
-static int  ncp_statfs(struct super_block *, struct kstatfs *);
+static int  ncp_statfs(struct dentry *, struct kstatfs *);
 
 static kmem_cache_t * ncp_inode_cachep;
 
@@ -724,13 +724,14 @@ static void ncp_put_super(struct super_block *sb)
         kfree(server);
 }
 
-static int ncp_statfs(struct super_block *sb, struct kstatfs *buf)
+static int ncp_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
         struct dentry* d;
         struct inode* i;
         struct ncp_inode_info* ni;
         struct ncp_server* s;
         struct ncp_volume_info vi;
+        struct super_block *sb = dentry->d_sb;
         int err;
         __u8 dh;
         
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index ff645a961bc8..937fbfc381bb 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -65,7 +65,7 @@ static int nfs_write_inode(struct inode *,int);
 static void nfs_delete_inode(struct inode *);
 static void nfs_clear_inode(struct inode *);
 static void nfs_umount_begin(struct super_block *);
-static int  nfs_statfs(struct super_block *, struct kstatfs *);
+static int  nfs_statfs(struct dentry *, struct kstatfs *);
 static int  nfs_show_options(struct seq_file *, struct vfsmount *);
 static int  nfs_show_stats(struct seq_file *, struct vfsmount *);
 static void nfs_zap_acl_cache(struct inode *);
@@ -534,8 +534,9 @@ nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent)
 }
 
 static int
-nfs_statfs(struct super_block *sb, struct kstatfs *buf)
+nfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+        struct super_block *sb = dentry->d_sb;
         struct nfs_server *server = NFS_SB(sb);
         unsigned char blockbits;
         unsigned long blockres;
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index de3998f15f10..5446a0861d1d 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -1310,7 +1310,7 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
         if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) ||
             (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
                        FATTR4_WORD1_SPACE_TOTAL))) {
-                status = vfs_statfs(dentry->d_inode->i_sb, &statfs);
+                status = vfs_statfs(dentry, &statfs);
                 if (status)
                         goto out_nfserr;
         }
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 1d65f13f458c..245eaa1fb59b 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1737,7 +1737,7 @@ int
 nfsd_statfs(struct svc_rqst *rqstp, struct svc_fh *fhp, struct kstatfs *stat)
 {
         int err = fh_verify(rqstp, fhp, 0, MAY_NOP);
-        if (!err && vfs_statfs(fhp->fh_dentry->d_inode->i_sb,stat))
+        if (!err && vfs_statfs(fhp->fh_dentry,stat))
                 err = nfserr_io;
         return err;
 }
diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index d5d5e969294f..0e14acea3f8b 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -2601,10 +2601,10 @@ static unsigned long __get_nr_free_mft_records(ntfs_volume *vol,
 
 /**
  * ntfs_statfs - return information about mounted NTFS volume
- * @sb:         super block of mounted volume
+ * @dentry:     dentry from mounted volume
  * @sfs:        statfs structure in which to return the information
  *
- * Return information about the mounted NTFS volume @sb in the statfs structure
+ * Return information about the mounted NTFS volume @dentry in the statfs structure
  * pointed to by @sfs (this is initialized with zeros before ntfs_statfs is
  * called). We interpret the values to be correct of the moment in time at
  * which we are called. Most values are variable otherwise and this isn't just
@@ -2617,8 +2617,9 @@ static unsigned long __get_nr_free_mft_records(ntfs_volume *vol,
  *
  * Return 0 on success or -errno on error.
  */
-static int ntfs_statfs(struct super_block *sb, struct kstatfs *sfs)
+static int ntfs_statfs(struct dentry *dentry, struct kstatfs *sfs)
 {
+        struct super_block *sb = dentry->d_sb;
         s64 size;
         ntfs_volume *vol = NTFS_SB(sb);
         ntfs_inode *mft_ni = NTFS_I(vol->mft_ino);
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 788b8b50dc4c..cdf73393f094 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -100,7 +100,7 @@ static int ocfs2_initialize_mem_caches(void);
 static void ocfs2_free_mem_caches(void);
 static void ocfs2_delete_osb(struct ocfs2_super *osb);
 
-static int ocfs2_statfs(struct super_block *sb, struct kstatfs *buf);
+static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
 
 static int ocfs2_sync_fs(struct super_block *sb, int wait);
 
@@ -857,7 +857,7 @@ static void ocfs2_put_super(struct super_block *sb)
         mlog_exit_void();
 }
 
-static int ocfs2_statfs(struct super_block *sb, struct kstatfs *buf)
+static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
         struct ocfs2_super *osb;
         u32 numbits, freebits;
@@ -866,9 +866,9 @@ static int ocfs2_statfs(struct super_block *sb, struct kstatfs *buf)
         struct buffer_head *bh = NULL;
         struct inode *inode = NULL;
 
-        mlog_entry("(%p, %p)\n", sb, buf);
+        mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
 
-        osb = OCFS2_SB(sb);
+        osb = OCFS2_SB(dentry->d_sb);
 
         inode = ocfs2_get_system_file_inode(osb,
                                             GLOBAL_BITMAP_SYSTEM_INODE,
@@ -891,7 +891,7 @@ static int ocfs2_statfs(struct super_block *sb, struct kstatfs *buf)
         freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
 
         buf->f_type = OCFS2_SUPER_MAGIC;
-        buf->f_bsize = sb->s_blocksize;
+        buf->f_bsize = dentry->d_sb->s_blocksize;
         buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
         buf->f_blocks = ((sector_t) numbits) *
                         (osb->s_clustersize >> osb->sb->s_blocksize_bits);
diff --git a/fs/open.c b/fs/open.c
index 4f178acd4c09..a37ff861108f 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -31,18 +31,18 @@
 
 #include <asm/unistd.h>
 
-int vfs_statfs(struct super_block *sb, struct kstatfs *buf)
+int vfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
         int retval = -ENODEV;
 
-        if (sb) {
+        if (dentry) {
                 retval = -ENOSYS;
-                if (sb->s_op->statfs) {
+                if (dentry->d_sb->s_op->statfs) {
                         memset(buf, 0, sizeof(*buf));
-                        retval = security_sb_statfs(sb);
+                        retval = security_sb_statfs(dentry);
                         if (retval)
                                 return retval;
-                        retval = sb->s_op->statfs(sb, buf);
+                        retval = dentry->d_sb->s_op->statfs(dentry, buf);
                         if (retval == 0 && buf->f_frsize == 0)
                                 buf->f_frsize = buf->f_bsize;
                 }
@@ -52,12 +52,12 @@ int vfs_statfs(struct super_block *sb, struct kstatfs *buf)
 
 EXPORT_SYMBOL(vfs_statfs);
 
-static int vfs_statfs_native(struct super_block *sb, struct statfs *buf)
+static int vfs_statfs_native(struct dentry *dentry, struct statfs *buf)
 {
         struct kstatfs st;
         int retval;
 
-        retval = vfs_statfs(sb, &st);
+        retval = vfs_statfs(dentry, &st);
         if (retval)
                 return retval;
 
@@ -95,12 +95,12 @@ static int vfs_statfs_native(struct super_block *sb, struct statfs *buf)
         return 0;
 }
 
-static int vfs_statfs64(struct super_block *sb, struct statfs64 *buf)
+static int vfs_statfs64(struct dentry *dentry, struct statfs64 *buf)
 {
         struct kstatfs st;
         int retval;
 
-        retval = vfs_statfs(sb, &st);
+        retval = vfs_statfs(dentry, &st);
         if (retval)
                 return retval;
 
@@ -130,7 +130,7 @@ asmlinkage long sys_statfs(const char __user * path, struct statfs __user * buf)
         error = user_path_walk(path, &nd);
         if (!error) {
                 struct statfs tmp;
-                error = vfs_statfs_native(nd.dentry->d_inode->i_sb, &tmp);
+                error = vfs_statfs_native(nd.dentry, &tmp);
                 if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
                         error = -EFAULT;
                 path_release(&nd);
@@ -149,7 +149,7 @@ asmlinkage long sys_statfs64(const char __user *path, size_t sz, struct statfs64
         error = user_path_walk(path, &nd);
         if (!error) {
                 struct statfs64 tmp;
-                error = vfs_statfs64(nd.dentry->d_inode->i_sb, &tmp);
+                error = vfs_statfs64(nd.dentry, &tmp);
                 if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
                         error = -EFAULT;
                 path_release(&nd);
@@ -168,7 +168,7 @@ asmlinkage long sys_fstatfs(unsigned int fd, struct statfs __user * buf)
         file = fget(fd);
         if (!file)
                 goto out;
-        error = vfs_statfs_native(file->f_dentry->d_inode->i_sb, &tmp);
+        error = vfs_statfs_native(file->f_dentry, &tmp);
         if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
                 error = -EFAULT;
         fput(file);
@@ -189,7 +189,7 @@ asmlinkage long sys_fstatfs64(unsigned int fd, size_t sz, struct statfs64 __user
         file = fget(fd);
         if (!file)
                 goto out;
-        error = vfs_statfs64(file->f_dentry->d_inode->i_sb, &tmp);
+        error = vfs_statfs64(file->f_dentry, &tmp);
         if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
                 error = -EFAULT;
         fput(file);
diff --git a/fs/qnx4/inode.c b/fs/qnx4/inode.c
index e6cca5cd4b44..2f24c46f72a1 100644
--- a/fs/qnx4/inode.c
+++ b/fs/qnx4/inode.c
@@ -128,7 +128,7 @@ static struct inode *qnx4_alloc_inode(struct super_block *sb);
 static void qnx4_destroy_inode(struct inode *inode);
 static void qnx4_read_inode(struct inode *);
 static int qnx4_remount(struct super_block *sb, int *flags, char *data);
-static int qnx4_statfs(struct super_block *, struct kstatfs *);
+static int qnx4_statfs(struct dentry *, struct kstatfs *);
 
 static struct super_operations qnx4_sops =
 {
@@ -282,8 +282,10 @@ unsigned long qnx4_block_map( struct inode *inode, long iblock )
         return block;
 }
 
-static int qnx4_statfs(struct super_block *sb, struct kstatfs *buf)
+static int qnx4_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+        struct super_block *sb = dentry->d_sb;
+
         lock_kernel();
 
         buf->f_type    = sb->s_magic;
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index f3ff41d33989..00f1321e9209 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -60,7 +60,7 @@ static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
 }
 
 static int reiserfs_remount(struct super_block *s, int *flags, char *data);
-static int reiserfs_statfs(struct super_block *s, struct kstatfs *buf);
+static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf);
 
 static int reiserfs_sync_fs(struct super_block *s, int wait)
 {
@@ -1938,15 +1938,15 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
         return errval;
 }
 
-static int reiserfs_statfs(struct super_block *s, struct kstatfs *buf)
+static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
-        struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
+        struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
 
         buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
         buf->f_bfree = sb_free_blocks(rs);
         buf->f_bavail = buf->f_bfree;
         buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
-        buf->f_bsize = s->s_blocksize;
+        buf->f_bsize = dentry->d_sb->s_blocksize;
         /* changed to accommodate gcc folks. */
         buf->f_type = REISERFS_SUPER_MAGIC;
         return 0;
diff --git a/fs/romfs/inode.c b/fs/romfs/inode.c
index 4d6cd6621062..283fbc6b8eea 100644
--- a/fs/romfs/inode.c
+++ b/fs/romfs/inode.c
@@ -179,12 +179,12 @@ outnobh:
 /* That's simple too. */
 
 static int
-romfs_statfs(struct super_block *sb, struct kstatfs *buf)
+romfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
         buf->f_type = ROMFS_MAGIC;
         buf->f_bsize = ROMBSIZE;
         buf->f_bfree = buf->f_bavail = buf->f_ffree;
-        buf->f_blocks = (romfs_maxsize(sb)+ROMBSIZE-1)>>ROMBSBITS;
+        buf->f_blocks = (romfs_maxsize(dentry->d_sb)+ROMBSIZE-1)>>ROMBSBITS;
         buf->f_namelen = ROMFS_MAXFN;
         return 0;
 }
diff --git a/fs/smbfs/inode.c b/fs/smbfs/inode.c
index 4a37c2bbfa3f..506ff87c1d4b 100644
--- a/fs/smbfs/inode.c
+++ b/fs/smbfs/inode.c
@@ -48,7 +48,7 @@
 
 static void smb_delete_inode(struct inode *);
 static void smb_put_super(struct super_block *);
-static int  smb_statfs(struct super_block *, struct kstatfs *);
+static int  smb_statfs(struct dentry *, struct kstatfs *);
 static int  smb_show_options(struct seq_file *, struct vfsmount *);
 
 static kmem_cache_t *smb_inode_cachep;
@@ -641,13 +641,13 @@ out_no_server:
 }
 
 static int
-smb_statfs(struct super_block *sb, struct kstatfs *buf)
+smb_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
         int result;
         
         lock_kernel();
 
-        result = smb_proc_dskattr(sb, buf);
+        result = smb_proc_dskattr(dentry, buf);
 
         unlock_kernel();
 
diff --git a/fs/smbfs/proc.c b/fs/smbfs/proc.c
index b1b878b81730..c3495059889d 100644
--- a/fs/smbfs/proc.c
+++ b/fs/smbfs/proc.c
@@ -3226,9 +3226,9 @@ smb_proc_settime(struct dentry *dentry, struct smb_fattr *fattr)
 }
 
 int
-smb_proc_dskattr(struct super_block *sb, struct kstatfs *attr)
+smb_proc_dskattr(struct dentry *dentry, struct kstatfs *attr)
 {
-        struct smb_sb_info *server = SMB_SB(sb);
+        struct smb_sb_info *server = SMB_SB(dentry->d_sb);
         int result;
         char *p;
         long unit;
diff --git a/fs/smbfs/proto.h b/fs/smbfs/proto.h
index 47664597e6b1..972ed7dad388 100644
--- a/fs/smbfs/proto.h
+++ b/fs/smbfs/proto.h
@@ -29,7 +29,7 @@ extern int smb_proc_getattr(struct dentry *dir, struct smb_fattr *fattr);
 extern int smb_proc_setattr(struct dentry *dir, struct smb_fattr *fattr);
 extern int smb_proc_setattr_unix(struct dentry *d, struct iattr *attr, unsigned int major, unsigned int minor);
 extern int smb_proc_settime(struct dentry *dentry, struct smb_fattr *fattr);
-extern int smb_proc_dskattr(struct super_block *sb, struct kstatfs *attr);
+extern int smb_proc_dskattr(struct dentry *dentry, struct kstatfs *attr);
 extern int smb_proc_read_link(struct smb_sb_info *server, struct dentry *d, char *buffer, int len);
 extern int smb_proc_symlink(struct smb_sb_info *server, struct dentry *d, const char *oldpath);
 extern int smb_proc_link(struct smb_sb_info *server, struct dentry *dentry, struct dentry *new_dentry);
diff --git a/fs/super.c b/fs/super.c
index 324c2d232f54..057b5325b7ef 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -486,7 +486,7 @@ asmlinkage long sys_ustat(unsigned dev, struct ustat __user * ubuf)
         s = user_get_super(new_decode_dev(dev));
         if (s == NULL)
                 goto out;
-        err = vfs_statfs(s, &sbuf);
+        err = vfs_statfs(s->s_root, &sbuf);
         drop_super(s);
         if (err)
                 goto out;
diff --git a/fs/sysv/inode.c b/fs/sysv/inode.c
index 3ff89cc5833a..58b2d22142ba 100644
--- a/fs/sysv/inode.c
+++ b/fs/sysv/inode.c
@@ -85,8 +85,9 @@ static void sysv_put_super(struct super_block *sb)
         kfree(sbi);
 }
 
-static int sysv_statfs(struct super_block *sb, struct kstatfs *buf)
+static int sysv_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+        struct super_block *sb = dentry->d_sb;
         struct sysv_sb_info *sbi = SYSV_SB(sb);
 
         buf->f_type = sb->s_magic;
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 2250774a831d..44fe2cb0bbb2 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -91,7 +91,7 @@ static void udf_load_partdesc(struct super_block *, struct buffer_head *);
 static void udf_open_lvid(struct super_block *);
 static void udf_close_lvid(struct super_block *);
 static unsigned int udf_count_free(struct super_block *);
-static int udf_statfs(struct super_block *, struct kstatfs *);
+static int udf_statfs(struct dentry *, struct kstatfs *);
 
 /* UDF filesystem type */
 static int udf_get_sb(struct file_system_type *fs_type,
@@ -1779,8 +1779,10 @@ udf_put_super(struct super_block *sb)
  *      Written, tested, and released.
  */
 static int
-udf_statfs(struct super_block *sb, struct kstatfs *buf)
+udf_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+        struct super_block *sb = dentry->d_sb;
+
         buf->f_type = UDF_SUPER_MAGIC;
         buf->f_bsize = sb->s_blocksize;
         buf->f_blocks = UDF_SB_PARTLEN(sb, UDF_SB_PARTITION(sb));
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index 768fb8d9e67a..fe5ab2aa2899 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -1113,8 +1113,9 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
         return 0;
 }
 
-static int ufs_statfs (struct super_block *sb, struct kstatfs *buf)
+static int ufs_statfs (struct dentry *dentry, struct kstatfs *buf)
 {
+        struct super_block *sb = dentry->d_sb;
         struct ufs_sb_private_info * uspi;
         struct ufs_super_block_first * usb1;
         struct ufs_super_block * usb;
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index d03c89a36655..4fb0fc65af34 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -684,10 +684,10 @@ xfs_fs_sync_super(
 
 STATIC int
 xfs_fs_statfs(
-        struct super_block      *sb,
+        struct dentry           *dentry,
         struct kstatfs          *statp)
 {
-        return -bhv_vfs_statvfs(vfs_from_sb(sb), statp, NULL);
+        return -bhv_vfs_statvfs(vfs_from_sb(dentry->d_sb), statp, NULL);
 }
 
 STATIC int