[PATCH 2/2] VFS: Permit filesystem to perform statfs with a known root dentry [try #2]

From: David Howells
Date: Wed Jun 21 2006 - 09:26:26 EST

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The attached patch gives 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@xxxxxxxxxx>
Acked-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
---

Documentation/filesystems/Locking | 2 +-
Documentation/filesystems/vfs.txt | 2 +-
arch/alpha/kernel/osf_sys.c | 2 +-
arch/mips/kernel/sysirix.c | 12 ++++++------
arch/parisc/hpux/sys_hpux.c | 10 +++++-----
arch/sparc64/solaris/fs.c | 4 ++--
fs/adfs/super.c | 8 ++++----
fs/affs/super.c | 5 +++--
fs/befs/linuxvfs.c | 5 +++--
fs/bfs/inode.c | 3 ++-
fs/cifs/cifsfs.c | 3 ++-
fs/coda/inode.c | 6 +++---
fs/coda/upcall.c | 4 ++--
fs/compat.c | 8 ++++----
fs/cramfs/inode.c | 4 +++-
fs/efs/super.c | 6 +++---
fs/ext2/super.c | 5 +++--
fs/ext3/super.c | 5 +++--
fs/fat/inode.c | 8 ++++----
fs/freevxfs/vxfs_super.c | 13 +++++++------
fs/fuse/inode.c | 3 ++-
fs/hfs/super.c | 4 +++-
fs/hfsplus/super.c | 4 +++-
fs/hostfs/hostfs_kern.c | 4 ++--
fs/hpfs/super.c | 3 ++-
fs/hppfs/hppfs_kern.c | 2 +-
fs/hugetlbfs/inode.c | 4 ++--
fs/isofs/inode.c | 6 ++++--
fs/jffs/inode-v23.c | 4 ++--
fs/jffs2/fs.c | 4 ++--
fs/jffs2/os-linux.h | 2 +-
fs/jfs/super.c | 4 ++--
fs/libfs.c | 4 ++--
fs/minix/inode.c | 10 +++++-----
fs/ncpfs/inode.c | 5 +++--
fs/nfs/inode.c | 5 +++--
fs/nfsd/nfs4xdr.c | 2 +-
fs/nfsd/vfs.c | 2 +-
fs/ntfs/super.c | 7 ++++---
fs/ocfs2/super.c | 10 +++++-----
fs/open.c | 26 +++++++++++++-------------
fs/qnx4/inode.c | 6 ++++--
fs/reiserfs/super.c | 8 ++++----
fs/romfs/inode.c | 4 ++--
fs/smbfs/inode.c | 6 +++---
fs/smbfs/proc.c | 4 ++--
fs/smbfs/proto.h | 2 +-
fs/super.c | 2 +-
fs/sysv/inode.c | 3 ++-
fs/udf/super.c | 6 ++++--
fs/ufs/super.c | 3 ++-
fs/xfs/linux-2.6/xfs_super.c | 4 ++--
include/linux/coda_psdev.h | 2 +-
include/linux/fs.h | 6 +++---
include/linux/mount.h | 5 +++++
include/linux/security.h | 14 +++++++-------
kernel/acct.c | 2 +-
mm/shmem.c | 4 ++--
security/dummy.c | 2 +-
security/selinux/hooks.c | 6 +++---
60 files changed, 175 insertions(+), 144 deletions(-)

diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 3abf08f..d31efbb 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -99,7 +99,7 @@ prototypes:
int (*sync_fs)(struct super_block *sb, int wait);
void (*write_super_lockfs) (struct super_block *);
void (*unlockfs) (struct super_block *);
- int (*statfs) (struct super_block *, struct kstatfs *);
+ int (*statfs) (struct dentry *, struct kstatfs *);
int (*remount_fs) (struct super_block *, int *, char *);
void (*clear_inode) (struct inode *);
void (*umount_begin) (struct super_block *);
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index dd7d0dc..9d3aed6 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -211,7 +211,7 @@ struct super_operations {
int (*sync_fs)(struct super_block *sb, int wait);
void (*write_super_lockfs) (struct super_block *);
void (*unlockfs) (struct super_block *);
- int (*statfs) (struct super_block *, struct kstatfs *);
+ int (*statfs) (struct dentry *, struct kstatfs *);
int (*remount_fs) (struct super_block *, int *, char *);
void (*clear_inode) (struct inode *);
void (*umount_begin) (struct super_block *);
diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c
index 31afe3d..e15dcf4 100644
--- a/arch/alpha/kernel/osf_sys.c
+++ b/arch/alpha/kernel/osf_sys.c
@@ -244,7 +244,7 @@ do_osf_statfs(struct dentry * dentry, st
unsigned long bufsiz)
{
struct kstatfs linux_stat;
- int error = vfs_statfs(dentry->d_inode->i_sb, &linux_stat);
+ int error = vfs_statfs(dentry, &linux_stat);
if (!error)
error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
return error;
diff --git a/arch/mips/kernel/sysirix.c b/arch/mips/kernel/sysirix.c
index 5407b78..19e1ef4 100644
--- a/arch/mips/kernel/sysirix.c
+++ b/arch/mips/kernel/sysirix.c
@@ -694,7 +694,7 @@ asmlinkage int irix_statfs(const char __
if (error)
goto out;

- error = vfs_statfs(nd.dentry->d_inode->i_sb, &kbuf);
+ error = vfs_statfs(nd.dentry, &kbuf);
if (error)
goto dput_and_out;

@@ -732,7 +732,7 @@ asmlinkage int irix_fstatfs(unsigned int
goto out;
}

- error = vfs_statfs(file->f_dentry->d_inode->i_sb, &kbuf);
+ error = vfs_statfs(file->f_dentry, &kbuf);
if (error)
goto out_f;

@@ -1360,7 +1360,7 @@ asmlinkage int irix_statvfs(char __user
error = user_path_walk(fname, &nd);
if (error)
goto out;
- error = vfs_statfs(nd.dentry->d_inode->i_sb, &kbuf);
+ error = vfs_statfs(nd.dentry, &kbuf);
if (error)
goto dput_and_out;

@@ -1406,7 +1406,7 @@ asmlinkage int irix_fstatvfs(int fd, str
error = -EBADF;
goto out;
}
- error = vfs_statfs(file->f_dentry->d_inode->i_sb, &kbuf);
+ error = vfs_statfs(file->f_dentry, &kbuf);
if (error)
goto out_f;

@@ -1611,7 +1611,7 @@ asmlinkage int irix_statvfs64(char __use
error = user_path_walk(fname, &nd);
if (error)
goto out;
- error = vfs_statfs(nd.dentry->d_inode->i_sb, &kbuf);
+ error = vfs_statfs(nd.dentry, &kbuf);
if (error)
goto dput_and_out;

@@ -1658,7 +1658,7 @@ asmlinkage int irix_fstatvfs64(int fd, s
error = -EBADF;
goto out;
}
- error = vfs_statfs(file->f_dentry->d_inode->i_sb, &kbuf);
+ error = vfs_statfs(file->f_dentry, &kbuf);
if (error)
goto out_f;

diff --git a/arch/parisc/hpux/sys_hpux.c b/arch/parisc/hpux/sys_hpux.c
index 05273cc..cb69727 100644
--- a/arch/parisc/hpux/sys_hpux.c
+++ b/arch/parisc/hpux/sys_hpux.c
@@ -145,7 +145,7 @@ static int hpux_ustat(dev_t dev, struct
s = user_get_super(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;
@@ -186,12 +186,12 @@ struct hpux_statfs {
int16_t f_pad;
};

-static int vfs_statfs_hpux(struct super_block *sb, struct hpux_statfs *buf)
+static int vfs_statfs_hpux(struct dentry *dentry, struct hpux_statfs *buf)
{
struct kstatfs st;
int retval;

- retval = vfs_statfs(sb, &st);
+ retval = vfs_statfs(dentry, &st);
if (retval)
return retval;

@@ -219,7 +219,7 @@ asmlinkage long hpux_statfs(const char _
error = user_path_walk(path, &nd);
if (!error) {
struct hpux_statfs tmp;
- error = vfs_statfs_hpux(nd.dentry->d_inode->i_sb, &tmp);
+ error = vfs_statfs_hpux(nd.dentry, &tmp);
if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
error = -EFAULT;
path_release(&nd);
@@ -237,7 +237,7 @@ asmlinkage long hpux_fstatfs(unsigned in
file = fget(fd);
if (!file)
goto out;
- error = vfs_statfs_hpux(file->f_dentry->d_inode->i_sb, &tmp);
+ error = vfs_statfs_hpux(file->f_dentry, &tmp);
if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
error = -EFAULT;
fput(file);
diff --git a/arch/sparc64/solaris/fs.c b/arch/sparc64/solaris/fs.c
index 4885ca6..0f0eb6a 100644
--- a/arch/sparc64/solaris/fs.c
+++ b/arch/sparc64/solaris/fs.c
@@ -356,7 +356,7 @@ static int report_statvfs(struct vfsmoun
int error;
struct sol_statvfs __user *ss = A(buf);

- error = vfs_statfs(mnt->mnt_sb, &s);
+ error = vfs_statfs(mnt->mnt_root, &s);
if (!error) {
const char *p = mnt->mnt_sb->s_type->name;
int i = 0;
@@ -392,7 +392,7 @@ static int report_statvfs64(struct vfsmo
int error;
struct sol_statvfs64 __user *ss = A(buf);

- error = vfs_statfs(mnt->mnt_sb, &s);
+ error = vfs_statfs(mnt->mnt_root, &s);
if (!error) {
const char *p = mnt->mnt_sb->s_type->name;
int i = 0;
diff --git a/fs/adfs/super.c b/fs/adfs/super.c
index 1b58a9b..ba1c88a 100644
--- a/fs/adfs/super.c
+++ b/fs/adfs/super.c
@@ -196,17 +196,17 @@ static int adfs_remount(struct super_blo
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 6a52e78..8765cba 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -18,7 +18,7 @@ #include "affs.h"

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
}

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 6ed07a5..08201fa 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -49,7 +49,7 @@ static int befs_nls2utf(struct super_blo
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
}

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 e7da03f..cf74f3d 100644
--- a/fs/bfs/inode.c
+++ b/fs/bfs/inode.c
@@ -203,8 +203,9 @@ static void bfs_put_super(struct super_b
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 08b3580..7520f46 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 cba7020..87f1dc8 100644
--- a/fs/coda/inode.c
+++ b/fs/coda/inode.c
@@ -36,7 +36,7 @@ #include "coda_int.h"
/* 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_
.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 1bae996..b040eba 100644
--- a/fs/coda/upcall.c
+++ b/fs/coda/upcall.c
@@ -611,7 +611,7 @@ int venus_pioctl(struct super_block *sb,
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,
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 b1f6478..7e7e5bc 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -197,7 +197,7 @@ asmlinkage long compat_sys_statfs(const
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(unsig
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(cons
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(uns
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 37a91a1..8a9d5d3 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 1ba5e14..8ac2462 100644
--- a/fs/efs/super.c
+++ b/fs/efs/super.c
@@ -15,7 +15,7 @@ #include <linux/slab.h>
#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 a4dfffa..a6c4d6e 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -39,7 +39,7 @@ #include "xip.h"
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 657f8e7..e08b643 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -58,7 +58,7 @@ static int ext3_sync_fs(struct super_blo
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 @@ #endif
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 c1ce284..7c35d58 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -539,18 +539,18 @@ static int fat_remount(struct super_bloc
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 d76eeaa..b74b791 100644
--- a/fs/freevxfs/vxfs_super.c
+++ b/fs/freevxfs/vxfs_super.c
@@ -40,6 +40,7 @@ #include <linux/kernel.h>
#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

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 c91f0a5..a13c0f5 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -236,8 +236,9 @@ static void convert_fuse_statfs(struct k
/* 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 ee5b80a..d9227bf 100644
--- a/fs/hfs/super.c
+++ b/fs/hfs/super.c
@@ -80,8 +80,10 @@ static void hfs_put_super(struct super_b
*
* 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 0ed8b7e..0a92fa2 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -212,8 +212,10 @@ static void hfsplus_put_super(struct sup
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 04035e0..8e0d377 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
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 3b25cf3..f798480 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -135,8 +135,9 @@ static unsigned count_bitmaps(struct sup
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 ec43c22..3a9bdf5 100644
--- a/fs/hppfs/hppfs_kern.c
+++ b/fs/hppfs/hppfs_kern.c
@@ -616,7 +616,7 @@ static const struct file_operations hppf
.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 4665c26..678fc72 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -467,9 +467,9 @@ static int hugetlbfs_set_page_dirty(stru
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 17268da..3f9c8ba 100644
--- a/fs/isofs/inode.c
+++ b/fs/isofs/inode.c
@@ -56,7 +56,7 @@ #endif
}

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 dd93a09..9e46ea6 100644
--- a/fs/jffs/inode-v23.c
+++ b/fs/jffs/inode-v23.c
@@ -377,9 +377,9 @@ jffs_new_inode(const struct inode * dir,

/* 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 7b6c24b..2900ec3 100644
--- a/fs/jffs2/fs.c
+++ b/fs/jffs2/fs.c
@@ -192,9 +192,9 @@ int jffs2_setattr(struct dentry *dentry,
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 cd4021b..6b52235 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 18a2813..73d2aba 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -139,9 +139,9 @@ #endif
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 7d70efa..1b11563 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -20,9 +20,9 @@ int simple_getattr(struct vfsmount *mnt,
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 14f24df..a6fb509 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -19,7 +19,7 @@ #include <linux/vfs.h>

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 8db033f..90d2ea2 100644
--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -39,7 +39,7 @@ #include "getopt.h"

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 @@ #endif /* CONFIG_NCPFS_NLS */
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 ff645a9..937fbfc 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -65,7 +65,7 @@ static int nfs_write_inode(struct inode
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 @@ #endif /* CONFIG_NFS_V3_ACL */
}

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 de3998f..5446a08 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -1310,7 +1310,7 @@ nfsd4_encode_fattr(struct svc_fh *fhp, s
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 1d65f13..245eaa1 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 d5d5e96..0e14ace 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -2601,10 +2601,10 @@ static unsigned long __get_nr_free_mft_r

/**
* 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_r
*
* 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 788b8b5..cdf7339 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -100,7 +100,7 @@ static int ocfs2_initialize_mem_caches(v
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
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_blo
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_blo
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 4f178ac..a37ff86 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -31,18 +31,18 @@ #include <linux/audit.h>

#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, s

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 supe
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 __
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
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
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 i
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 e6cca5c..2f24c46 100644
--- a/fs/qnx4/inode.c
+++ b/fs/qnx4/inode.c
@@ -128,7 +128,7 @@ static struct inode *qnx4_alloc_inode(st
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 ino
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 f3ff41d..00f1321 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -60,7 +60,7 @@ static int is_any_reiserfs_magic_string(
}

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 @@ #endif
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 4d6cd66..283fbc6 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 4a37c2b..506ff87 100644
--- a/fs/smbfs/inode.c
+++ b/fs/smbfs/inode.c
@@ -48,7 +48,7 @@ #define SMB_TTL_DEFAULT 1000

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 b1b878b..c349505 100644
--- a/fs/smbfs/proc.c
+++ b/fs/smbfs/proc.c
@@ -3226,9 +3226,9 @@ smb_proc_settime(struct dentry *dentry,
}

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 4766459..972ed7d 100644
--- a/fs/smbfs/proto.h
+++ b/fs/smbfs/proto.h
@@ -29,7 +29,7 @@ extern int smb_proc_getattr(struct dentr
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 324c2d2..057b532 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -486,7 +486,7 @@ asmlinkage long sys_ustat(unsigned dev,
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 3ff89cc..58b2d22 100644
--- a/fs/sysv/inode.c
+++ b/fs/sysv/inode.c
@@ -85,8 +85,9 @@ static void sysv_put_super(struct super_
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 2250774..44fe2cb 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -91,7 +91,7 @@ static void udf_load_partdesc(struct sup
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 @@ #endif
* 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 768fb8d..fe5ab2a 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -1113,8 +1113,9 @@ #endif
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 7702355..92c0cd4 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -703,10 +703,10 @@ xfs_fs_sync_super(

STATIC int
xfs_fs_statfs(
- struct super_block *sb,
+ struct dentry *dentry,
struct kstatfs *statp)
{
- vfs_t *vfsp = vfs_from_sb(sb);
+ vfs_t *vfsp = vfs_from_sb(dentry->d_sb);
int error;

VFS_STATVFS(vfsp, statp, NULL, error);
diff --git a/include/linux/coda_psdev.h b/include/linux/coda_psdev.h
index d539262..98f6c52 100644
--- a/include/linux/coda_psdev.h
+++ b/include/linux/coda_psdev.h
@@ -70,7 +70,7 @@ int venus_pioctl(struct super_block *sb,
unsigned int cmd, struct PioctlData *data);
int coda_downcall(int opcode, union outputArgs *out, struct super_block *sb);
int venus_fsync(struct super_block *sb, struct CodaFid *fid);
-int venus_statfs(struct super_block *sb, struct kstatfs *sfs);
+int venus_statfs(struct dentry *dentry, struct kstatfs *sfs);

/* messages between coda filesystem in kernel and Venus */
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 8868384..9e94361 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1097,7 +1097,7 @@ struct super_operations {
int (*sync_fs)(struct super_block *sb, int wait);
void (*write_super_lockfs) (struct super_block *);
void (*unlockfs) (struct super_block *);
- int (*statfs) (struct super_block *, struct kstatfs *);
+ int (*statfs) (struct dentry *, struct kstatfs *);
int (*remount_fs) (struct super_block *, int *, char *);
void (*clear_inode) (struct inode *);
void (*umount_begin) (struct super_block *);
@@ -1326,7 +1326,7 @@ extern struct vfsmount *copy_tree(struct
extern void mnt_set_mountpoint(struct vfsmount *, struct dentry *,
struct vfsmount *);

-extern int vfs_statfs(struct super_block *, struct kstatfs *);
+extern int vfs_statfs(struct dentry *, struct kstatfs *);

/* /sys/fs */
extern struct subsystem fs_subsys;
@@ -1747,7 +1747,7 @@ extern int dcache_dir_close(struct inode
extern loff_t dcache_dir_lseek(struct file *, loff_t, int);
extern int dcache_readdir(struct file *, void *, filldir_t);
extern int simple_getattr(struct vfsmount *, struct dentry *, struct kstat *);
-extern int simple_statfs(struct super_block *, struct kstatfs *);
+extern int simple_statfs(struct dentry *, struct kstatfs *);
extern int simple_link(struct dentry *, struct inode *, struct dentry *);
extern int simple_unlink(struct inode *, struct dentry *);
extern int simple_rmdir(struct inode *, struct dentry *);
diff --git a/include/linux/mount.h b/include/linux/mount.h
index b7472ae..60718f1 100644
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -17,6 +17,11 @@ #include <linux/list.h>
#include <linux/spinlock.h>
#include <asm/atomic.h>

+struct super_block;
+struct vfsmount;
+struct dentry;
+struct namespace;
+
#define MNT_NOSUID 0x01
#define MNT_NODEV 0x02
#define MNT_NOEXEC 0x04
diff --git a/include/linux/security.h b/include/linux/security.h
index 4dfb1b8..b8bc2d2 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -171,9 +171,9 @@ #ifdef CONFIG_SECURITY
* Deallocate and clear the sb->s_security field.
* @sb contains the super_block structure to be modified.
* @sb_statfs:
- * Check permission before obtaining filesystem statistics for the @sb
- * filesystem.
- * @sb contains the super_block structure for the filesystem.
+ * Check permission before obtaining filesystem statistics for the @mnt
+ * mountpoint.
+ * @dentry is a handle on the superblock for the filesystem.
* Return 0 if permission is granted.
* @sb_mount:
* Check permission before an object specified by @dev_name is mounted on
@@ -1127,7 +1127,7 @@ struct security_operations {
int (*sb_copy_data)(struct file_system_type *type,
void *orig, void *copy);
int (*sb_kern_mount) (struct super_block *sb, void *data);
- int (*sb_statfs) (struct super_block * sb);
+ int (*sb_statfs) (struct dentry *dentry);
int (*sb_mount) (char *dev_name, struct nameidata * nd,
char *type, unsigned long flags, void *data);
int (*sb_check_sb) (struct vfsmount * mnt, struct nameidata * nd);
@@ -1450,9 +1450,9 @@ static inline int security_sb_kern_mount
return security_ops->sb_kern_mount (sb, data);
}

-static inline int security_sb_statfs (struct super_block *sb)
+static inline int security_sb_statfs (struct dentry *dentry)
{
- return security_ops->sb_statfs (sb);
+ return security_ops->sb_statfs (dentry);
}

static inline int security_sb_mount (char *dev_name, struct nameidata *nd,
@@ -2162,7 +2162,7 @@ static inline int security_sb_kern_mount
return 0;
}

-static inline int security_sb_statfs (struct super_block *sb)
+static inline int security_sb_statfs (struct dentry *dentry)
{
return 0;
}
diff --git a/kernel/acct.c b/kernel/acct.c
index b327f4d..6802020 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -118,7 +118,7 @@ static int check_free_space(struct file
spin_unlock(&acct_globals.lock);

/* May block */
- if (vfs_statfs(file->f_dentry->d_inode->i_sb, &sbuf))
+ if (vfs_statfs(file->f_dentry, &sbuf))
return res;
suspend = sbuf.f_blocks * SUSPEND;
resume = sbuf.f_blocks * RESUME;
diff --git a/mm/shmem.c b/mm/shmem.c
index 7617bb1..10020d8 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1654,9 +1654,9 @@ static ssize_t shmem_file_sendfile(struc
return desc.error;
}

-static int shmem_statfs(struct super_block *sb, struct kstatfs *buf)
+static int shmem_statfs(struct dentry *dentry, struct kstatfs *buf)
{
- struct shmem_sb_info *sbinfo = SHMEM_SB(sb);
+ struct shmem_sb_info *sbinfo = SHMEM_SB(dentry->d_sb);

buf->f_type = TMPFS_MAGIC;
buf->f_bsize = PAGE_CACHE_SIZE;
diff --git a/security/dummy.c b/security/dummy.c
index 64f6da0..e24b86a 100644
--- a/security/dummy.c
+++ b/security/dummy.c
@@ -191,7 +191,7 @@ static int dummy_sb_kern_mount (struct s
return 0;
}

-static int dummy_sb_statfs (struct super_block *sb)
+static int dummy_sb_statfs (struct dentry *dentry)
{
return 0;
}
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 54adc9d..c72958b 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -1903,13 +1903,13 @@ static int selinux_sb_kern_mount(struct
return superblock_has_perm(current, sb, FILESYSTEM__MOUNT, &ad);
}

-static int selinux_sb_statfs(struct super_block *sb)
+static int selinux_sb_statfs(struct dentry *dentry)
{
struct avc_audit_data ad;

AVC_AUDIT_DATA_INIT(&ad,FS);
- ad.u.fs.dentry = sb->s_root;
- return superblock_has_perm(current, sb, FILESYSTEM__GETATTR, &ad);
+ ad.u.fs.dentry = dentry->d_sb->s_root;
+ return superblock_has_perm(current, dentry->d_sb, FILESYSTEM__GETATTR, &ad);
}

static int selinux_mount(char * dev_name,

-
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