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Subject[PATCH 43/52] CRED: Pass credentials through the statfs() superblock op
Date
Pass credentials through the statfs() superblock operation.

Signed-off-by: David Howells <dhowells@redhat.com>
---

fs/afs/super.c | 6 ++++--
fs/ext3/super.c | 6 ++++--
fs/fat/inode.c | 3 ++-
fs/libfs.c | 2 +-
fs/nfs/super.c | 6 +++---
fs/open.c | 3 ++-
include/linux/fs.h | 4 ++--
mm/shmem.c | 3 ++-
8 files changed, 20 insertions(+), 13 deletions(-)

diff --git a/fs/afs/super.c b/fs/afs/super.c
index 82ccd94..c7d7c1c 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -35,7 +35,8 @@ static int afs_get_sb(struct file_system_type *fs_type,
static struct inode *afs_alloc_inode(struct super_block *sb);
static void afs_put_super(struct super_block *sb);
static void afs_destroy_inode(struct inode *inode);
-static int afs_statfs(struct dentry *dentry, struct kstatfs *buf);
+static int afs_statfs(struct dentry *dentry, struct kstatfs *buf,
+ struct cred *cred);

struct file_system_type afs_fs_type = {
.owner = THIS_MODULE,
@@ -511,7 +512,8 @@ static void afs_destroy_inode(struct inode *inode)
/*
* return information about an AFS volume
*/
-static int afs_statfs(struct dentry *dentry, struct kstatfs *buf)
+static int afs_statfs(struct dentry *dentry, struct kstatfs *buf,
+ struct cred *cred)
{
struct afs_volume_status vs;
struct afs_vnode *vnode = AFS_FS_I(dentry->d_inode);
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 348bb6b..29a41cc 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -59,7 +59,8 @@ 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 dentry * dentry, struct kstatfs * buf);
+static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf,
+ struct cred *cred);
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);
@@ -2429,7 +2430,8 @@ restore_opts:
return err;
}

-static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf)
+static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf,
+ struct cred *cred)
{
struct super_block *sb = dentry->d_sb;
struct ext3_sb_info *sbi = EXT3_SB(sb);
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 519e1b4..a224325 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -537,7 +537,8 @@ static int fat_remount(struct super_block *sb, int *flags, char *data)
return 0;
}

-static int fat_statfs(struct dentry *dentry, struct kstatfs *buf)
+static int fat_statfs(struct dentry *dentry, struct kstatfs *buf,
+ struct cred *cred)
{
struct msdos_sb_info *sbi = MSDOS_SB(dentry->d_sb);

diff --git a/fs/libfs.c b/fs/libfs.c
index 107412e..e214329 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -20,7 +20,7 @@ int simple_getattr(struct vfsmount *mnt, struct dentry *dentry,
return 0;
}

-int simple_statfs(struct dentry *dentry, struct kstatfs *buf)
+int simple_statfs(struct dentry *dentry, struct kstatfs *buf, struct cred *cred)
{
buf->f_type = dentry->d_sb->s_magic;
buf->f_bsize = PAGE_CACHE_SIZE;
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 44e2583..524e8a1 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -220,7 +220,7 @@ static match_table_t nfs_secflavor_tokens = {


static void nfs_umount_begin(struct vfsmount *, int);
-static int nfs_statfs(struct dentry *, struct kstatfs *);
+static int nfs_statfs(struct dentry *, struct kstatfs *, struct cred *);
static int nfs_show_options(struct seq_file *, struct vfsmount *);
static int nfs_show_stats(struct seq_file *, struct vfsmount *);
static int nfs_get_sb(struct file_system_type *, int, const char *, void *,
@@ -358,9 +358,9 @@ void __exit unregister_nfs_fs(void)
/*
* Deliver file system statistics to userspace
*/
-static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf)
+static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf,
+ struct cred *acred)
{
- struct cred *acred = current->cred;
struct nfs_server *server = NFS_SB(dentry->d_sb);
unsigned char blockbits;
unsigned long blockres;
diff --git a/fs/open.c b/fs/open.c
index c383efe..291f875 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -30,6 +30,7 @@

int vfs_statfs(struct dentry *dentry, struct kstatfs *buf)
{
+ struct cred *cred = current->cred;
int retval = -ENODEV;

if (dentry) {
@@ -39,7 +40,7 @@ int vfs_statfs(struct dentry *dentry, struct kstatfs *buf)
retval = security_sb_statfs(dentry);
if (retval)
return retval;
- retval = dentry->d_sb->s_op->statfs(dentry, buf);
+ retval = dentry->d_sb->s_op->statfs(dentry, buf, cred);
if (retval == 0 && buf->f_frsize == 0)
buf->f_frsize = buf->f_bsize;
}
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 658bdc8..2fec09a 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1199,7 +1199,7 @@ 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 dentry *, struct kstatfs *);
+ int (*statfs) (struct dentry *, struct kstatfs *, struct cred *);
int (*remount_fs) (struct super_block *, int *, char *);
void (*clear_inode) (struct inode *);
void (*umount_begin) (struct vfsmount *, int);
@@ -1801,7 +1801,7 @@ extern int dcache_dir_close(struct inode *, struct file *);
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 dentry *, struct kstatfs *);
+extern int simple_statfs(struct dentry *, struct kstatfs *, struct cred *);
extern int simple_link(struct dentry *, struct inode *, struct dentry *,
struct cred *);
extern int simple_unlink(struct inode *, struct dentry *, struct cred *);
diff --git a/mm/shmem.c b/mm/shmem.c
index 4bcfdb8..432f023 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1682,7 +1682,8 @@ static ssize_t shmem_file_read(struct file *filp, char __user *buf, size_t count
return desc.error;
}

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

-
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