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fs: take the ACL checks to common code 

Replace the ->check_acl method with a ->get_acl method that simply reads an
ACL from disk after having a cache miss.  This means we can replace the ACL
checking boilerplate code with a single implementation in namei.c.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Christoph Hellwig 2011-07-23 17:37:31 +02:00 committed by Al Viro
parent edde854e8b
commit 4e34e719e4
52 changed files with 92 additions and 294 deletions
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4
Documentation/filesystems/Locking
View File

@ -52,7 +52,7 @@ ata *);
void (*put_link) (struct dentry *, struct nameidata *, void *);
void (*truncate) (struct inode *);
int (*permission) (struct inode *, int, unsigned int);
int (*check_acl)(struct inode *, int);
int (*get_acl)(struct inode *, int);
int (*setattr) (struct dentry *, struct iattr *);
int (*getattr) (struct vfsmount *, struct dentry *, struct kstat *);
int (*setxattr) (struct dentry *, const char *,const void *,size_t,int);
@ -80,7 +80,7 @@ put_link: no
truncate: yes (see below)
setattr: yes
permission: no (may not block if called in rcu-walk mode)
check_acl: no
get_acl: no
getattr: no
setxattr: yes
getxattr: no

7
Documentation/filesystems/porting
View File

@ -407,10 +407,11 @@ to some pointer to returning that pointer. On errors return ERR_PTR(...).
--
[mandatory]
->permission(), generic_permission() and ->check_acl() have lost flags
->permission() and generic_permission()have lost flags
argument; instead of passing IPERM_FLAG_RCU we add MAY_NOT_BLOCK into mask.
generic_permission() has also lost the check_acl argument; if you want
non-NULL to be used for that inode, put it into ->i_op->check_acl.
generic_permission() has also lost the check_acl argument; ACL checking
has been taken to VFS and filesystems need to provide a non-NULL ->i_op->get_acl
to read an ACL from disk.
--
[mandatory]

2
Documentation/filesystems/vfs.txt
View File

@ -356,7 +356,7 @@ struct inode_operations {
void (*put_link) (struct dentry *, struct nameidata *, void *);
void (*truncate) (struct inode *);
int (*permission) (struct inode *, int);
int (*check_acl)(struct inode *, int);
int (*get_acl)(struct inode *, int);
int (*setattr) (struct dentry *, struct iattr *);
int (*getattr) (struct vfsmount *mnt, struct dentry *, struct kstat *);
int (*setxattr) (struct dentry *, const char *,const void *,size_t,int);

14
fs/9p/acl.c
View File

@ -96,7 +96,7 @@ static struct posix_acl *v9fs_get_cached_acl(struct inode *inode, int type)
return acl;
}
int v9fs_check_acl(struct inode *inode, int mask)
struct posix_acl *v9fs_iop_get_acl(struct inode *inode, int type)
{
struct posix_acl *acl;
struct v9fs_session_info *v9ses;
@ -108,18 +108,10 @@ int v9fs_check_acl(struct inode *inode, int mask)
* On access = client and acl = on mode get the acl
* values from the server
*/
return -EAGAIN;
return NULL;
}
acl = v9fs_get_cached_acl(inode, ACL_TYPE_ACCESS);
return v9fs_get_cached_acl(inode, type);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl) {
int error = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
return error;
}
return -EAGAIN;
}
static int v9fs_set_acl(struct dentry *dentry, int type, struct posix_acl *acl)

4
fs/9p/acl.h
View File

@ -16,14 +16,14 @@
#ifdef CONFIG_9P_FS_POSIX_ACL
extern int v9fs_get_acl(struct inode *, struct p9_fid *);
extern int v9fs_check_acl(struct inode *inode, int mask);
extern struct posix_acl *v9fs_iop_get_acl(struct inode *inode, int type);
extern int v9fs_acl_chmod(struct dentry *);
extern int v9fs_set_create_acl(struct dentry *,
struct posix_acl **, struct posix_acl **);
extern int v9fs_acl_mode(struct inode *dir, mode_t *modep,
struct posix_acl **dpacl, struct posix_acl **pacl);
#else
#define v9fs_check_acl NULL
#define v9fs_iop_get_acl NULL
static inline int v9fs_get_acl(struct inode *inode, struct p9_fid *fid)
{
return 0;

4
fs/9p/vfs_inode_dotl.c
View File

@ -872,7 +872,7 @@ const struct inode_operations v9fs_dir_inode_operations_dotl = {
.getxattr = generic_getxattr,
.removexattr = generic_removexattr,
.listxattr = v9fs_listxattr,
.check_acl = v9fs_check_acl,
.get_acl = v9fs_iop_get_acl,
};
const struct inode_operations v9fs_file_inode_operations_dotl = {
@ -882,7 +882,7 @@ const struct inode_operations v9fs_file_inode_operations_dotl = {
.getxattr = generic_getxattr,
.removexattr = generic_removexattr,
.listxattr = v9fs_listxattr,
.check_acl = v9fs_check_acl,
.get_acl = v9fs_iop_get_acl,
};
const struct inode_operations v9fs_symlink_inode_operations_dotl = {

18
fs/btrfs/acl.c
View File

@ -30,7 +30,7 @@
#ifdef CONFIG_BTRFS_FS_POSIX_ACL
static struct posix_acl *btrfs_get_acl(struct inode *inode, int type)
struct posix_acl *btrfs_get_acl(struct inode *inode, int type)
{
int size;
const char *name;
@ -195,22 +195,6 @@ static int btrfs_xattr_acl_set(struct dentry *dentry, const char *name,
return ret;
}
int btrfs_check_acl(struct inode *inode, int mask)
{
int error = -EAGAIN;
struct posix_acl *acl;
acl = btrfs_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl) {
error = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
}
return error;
}
/*
* btrfs_init_acl is already generally called under fs_mutex, so the locking
* stuff has been fixed to work with that. If the locking stuff changes, we

4
fs/btrfs/ctree.h
View File

@ -2645,9 +2645,9 @@ do { \
/* acl.c */
#ifdef CONFIG_BTRFS_FS_POSIX_ACL
int btrfs_check_acl(struct inode *inode, int mask);
struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
#else
#define btrfs_check_acl NULL
#define btrfs_get_acl NULL
#endif
int btrfs_init_acl(struct btrfs_trans_handle *trans,
struct inode *inode, struct inode *dir);

10
fs/btrfs/inode.c
View File

@ -7351,12 +7351,12 @@ static const struct inode_operations btrfs_dir_inode_operations = {
.listxattr = btrfs_listxattr,
.removexattr = btrfs_removexattr,
.permission = btrfs_permission,
.check_acl = btrfs_check_acl,
.get_acl = btrfs_get_acl,
};
static const struct inode_operations btrfs_dir_ro_inode_operations = {
.lookup = btrfs_lookup,
.permission = btrfs_permission,
.check_acl = btrfs_check_acl,
.get_acl = btrfs_get_acl,
};
static const struct file_operations btrfs_dir_file_operations = {
@ -7425,7 +7425,7 @@ static const struct inode_operations btrfs_file_inode_operations = {
.removexattr = btrfs_removexattr,
.permission = btrfs_permission,
.fiemap = btrfs_fiemap,
.check_acl = btrfs_check_acl,
.get_acl = btrfs_get_acl,
};
static const struct inode_operations btrfs_special_inode_operations = {
.getattr = btrfs_getattr,
@ -7435,7 +7435,7 @@ static const struct inode_operations btrfs_special_inode_operations = {
.getxattr = btrfs_getxattr,
.listxattr = btrfs_listxattr,
.removexattr = btrfs_removexattr,
.check_acl = btrfs_check_acl,
.get_acl = btrfs_get_acl,
};
static const struct inode_operations btrfs_symlink_inode_operations = {
.readlink = generic_readlink,
@ -7447,7 +7447,7 @@ static const struct inode_operations btrfs_symlink_inode_operations = {
.getxattr = btrfs_getxattr,
.listxattr = btrfs_listxattr,
.removexattr = btrfs_removexattr,
.check_acl = btrfs_check_acl,
.get_acl = btrfs_get_acl,
};
const struct dentry_operations btrfs_dentry_operations = {

19
fs/ext2/acl.c
View File

@ -128,7 +128,7 @@ ext2_acl_to_disk(const struct posix_acl *acl, size_t *size)
/*
* inode->i_mutex: don't care
*/
static struct posix_acl *
struct posix_acl *
ext2_get_acl(struct inode *inode, int type)
{
int name_index;
@ -231,23 +231,6 @@ ext2_set_acl(struct inode *inode, int type, struct posix_acl *acl)
return error;
}
int
ext2_check_acl(struct inode *inode, int mask)
{
struct posix_acl *acl;
acl = ext2_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl) {
int error = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
return error;
}
return -EAGAIN;
}
/*
* Initialize the ACLs of a new inode. Called from ext2_new_inode.
*

4
fs/ext2/acl.h
View File

@ -54,13 +54,13 @@ static inline int ext2_acl_count(size_t size)
#ifdef CONFIG_EXT2_FS_POSIX_ACL
/* acl.c */
extern int ext2_check_acl (struct inode *, int);
extern struct posix_acl *ext2_get_acl(struct inode *inode, int type);
extern int ext2_acl_chmod (struct inode *);
extern int ext2_init_acl (struct inode *, struct inode *);
#else
#include <linux/sched.h>
#define ext2_check_acl NULL
#define ext2_get_acl NULL
#define ext2_get_acl NULL
#define ext2_set_acl NULL

2
fs/ext2/file.c
View File

@ -102,6 +102,6 @@ const struct inode_operations ext2_file_inode_operations = {
.removexattr = generic_removexattr,
#endif
.setattr = ext2_setattr,
.check_acl = ext2_check_acl,
.get_acl = ext2_get_acl,
.fiemap = ext2_fiemap,
};

4
fs/ext2/namei.c
View File

@ -408,7 +408,7 @@ const struct inode_operations ext2_dir_inode_operations = {
.removexattr = generic_removexattr,
#endif
.setattr = ext2_setattr,
.check_acl = ext2_check_acl,
.get_acl = ext2_get_acl,
};
const struct inode_operations ext2_special_inode_operations = {
@ -419,5 +419,5 @@ const struct inode_operations ext2_special_inode_operations = {
.removexattr = generic_removexattr,
#endif
.setattr = ext2_setattr,
.check_acl = ext2_check_acl,
.get_acl = ext2_get_acl,
};

19
fs/ext3/acl.c
View File

@ -131,7 +131,7 @@ ext3_acl_to_disk(const struct posix_acl *acl, size_t *size)
*
* inode->i_mutex: don't care
*/
static struct posix_acl *
struct posix_acl *
ext3_get_acl(struct inode *inode, int type)
{
int name_index;
@ -239,23 +239,6 @@ ext3_set_acl(handle_t *handle, struct inode *inode, int type,
return error;
}
int
ext3_check_acl(struct inode *inode, int mask)
{
struct posix_acl *acl;
acl = ext3_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl) {
int error = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
return error;
}
return -EAGAIN;
}
/*
* Initialize the ACLs of a new inode. Called from ext3_new_inode.
*

4
fs/ext3/acl.h
View File

@ -54,13 +54,13 @@ static inline int ext3_acl_count(size_t size)
#ifdef CONFIG_EXT3_FS_POSIX_ACL
/* acl.c */
extern int ext3_check_acl (struct inode *, int);
extern struct posix_acl *ext3_get_acl(struct inode *inode, int type);
extern int ext3_acl_chmod (struct inode *);
extern int ext3_init_acl (handle_t *, struct inode *, struct inode *);
#else /* CONFIG_EXT3_FS_POSIX_ACL */
#include <linux/sched.h>
#define ext3_check_acl NULL
#define ext3_get_acl NULL
static inline int
ext3_acl_chmod(struct inode *inode)

2
fs/ext3/file.c
View File

@ -79,7 +79,7 @@ const struct inode_operations ext3_file_inode_operations = {
.listxattr = ext3_listxattr,
.removexattr = generic_removexattr,
#endif
.check_acl = ext3_check_acl,
.get_acl = ext3_get_acl,
.fiemap = ext3_fiemap,
};

4
fs/ext3/namei.c
View File

@ -2529,7 +2529,7 @@ const struct inode_operations ext3_dir_inode_operations = {
.listxattr = ext3_listxattr,
.removexattr = generic_removexattr,
#endif
.check_acl = ext3_check_acl,
.get_acl = ext3_get_acl,
};
const struct inode_operations ext3_special_inode_operations = {
@ -2540,5 +2540,5 @@ const struct inode_operations ext3_special_inode_operations = {
.listxattr = ext3_listxattr,
.removexattr = generic_removexattr,
#endif
.check_acl = ext3_check_acl,
.get_acl = ext3_get_acl,
};

19
fs/ext4/acl.c
View File

@ -131,7 +131,7 @@ ext4_acl_to_disk(const struct posix_acl *acl, size_t *size)
*
* inode->i_mutex: don't care
*/
static struct posix_acl *
struct posix_acl *
ext4_get_acl(struct inode *inode, int type)
{
int name_index;
@ -237,23 +237,6 @@ ext4_set_acl(handle_t *handle, struct inode *inode, int type,
return error;
}
int
ext4_check_acl(struct inode *inode, int mask)
{
struct posix_acl *acl;
acl = ext4_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl) {
int error = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
return error;
}
return -EAGAIN;
}
/*
* Initialize the ACLs of a new inode. Called from ext4_new_inode.
*

4
fs/ext4/acl.h
View File

@ -54,13 +54,13 @@ static inline int ext4_acl_count(size_t size)
#ifdef CONFIG_EXT4_FS_POSIX_ACL
/* acl.c */
extern int ext4_check_acl(struct inode *, int);
struct posix_acl *ext4_get_acl(struct inode *inode, int type);
extern int ext4_acl_chmod(struct inode *);
extern int ext4_init_acl(handle_t *, struct inode *, struct inode *);
#else /* CONFIG_EXT4_FS_POSIX_ACL */
#include <linux/sched.h>
#define ext4_check_acl NULL
#define ext4_get_acl NULL
static inline int
ext4_acl_chmod(struct inode *inode)

2
fs/ext4/file.c
View File

@ -301,7 +301,7 @@ const struct inode_operations ext4_file_inode_operations = {
.listxattr = ext4_listxattr,
.removexattr = generic_removexattr,
#endif
.check_acl = ext4_check_acl,
.get_acl = ext4_get_acl,
.fiemap = ext4_fiemap,
};

4
fs/ext4/namei.c
View File

@ -2590,7 +2590,7 @@ const struct inode_operations ext4_dir_inode_operations = {
.listxattr = ext4_listxattr,
.removexattr = generic_removexattr,
#endif
.check_acl = ext4_check_acl,
.get_acl = ext4_get_acl,
.fiemap = ext4_fiemap,
};
@ -2602,5 +2602,5 @@ const struct inode_operations ext4_special_inode_operations = {
.listxattr = ext4_listxattr,
.removexattr = generic_removexattr,
#endif
.check_acl = ext4_check_acl,
.get_acl = ext4_get_acl,
};

14
fs/generic_acl.c
View File

@ -172,20 +172,6 @@ generic_acl_chmod(struct inode *inode)
return error;
}
int
generic_check_acl(struct inode *inode, int mask)
{
struct posix_acl *acl;
acl = get_cached_acl(inode, ACL_TYPE_ACCESS);
if (acl) {
int error = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
return error;
}
return -EAGAIN;
}
const struct xattr_handler generic_acl_access_handler = {
.prefix = POSIX_ACL_XATTR_ACCESS,
.flags = ACL_TYPE_ACCESS,

25
fs/gfs2/acl.c
View File

@ -67,30 +67,9 @@ static struct posix_acl *gfs2_acl_get(struct gfs2_inode *ip, int type)
return acl;
}
/**
* gfs2_check_acl - Check an ACL to see if we're allowed to do something
* @inode: the file we want to do something to
* @mask: what we want to do
*
* Returns: errno
*/
int gfs2_check_acl(struct inode *inode, int mask)
struct posix_acl *gfs2_get_acl(struct inode *inode, int type)
{
struct posix_acl *acl;
int error;
acl = gfs2_acl_get(GFS2_I(inode), ACL_TYPE_ACCESS);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl) {
error = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
return error;
}
return -EAGAIN;
return gfs2_acl_get(GFS2_I(inode), type);
}
static int gfs2_set_mode(struct inode *inode, mode_t mode)

2
fs/gfs2/acl.h
View File

@ -16,7 +16,7 @@
#define GFS2_POSIX_ACL_DEFAULT "posix_acl_default"
#define GFS2_ACL_MAX_ENTRIES 25
extern int gfs2_check_acl(struct inode *inode, int mask);
extern struct posix_acl *gfs2_get_acl(struct inode *inode, int type);
extern int gfs2_acl_create(struct gfs2_inode *dip, struct inode *inode);
extern int gfs2_acl_chmod(struct gfs2_inode *ip, struct iattr *attr);
extern const struct xattr_handler gfs2_xattr_system_handler;

6
fs/gfs2/inode.c
View File

@ -1846,7 +1846,7 @@ const struct inode_operations gfs2_file_iops = {
.listxattr = gfs2_listxattr,
.removexattr = gfs2_removexattr,
.fiemap = gfs2_fiemap,
.check_acl = gfs2_check_acl,
.get_acl = gfs2_get_acl,
};
const struct inode_operations gfs2_dir_iops = {
@ -1867,7 +1867,7 @@ const struct inode_operations gfs2_dir_iops = {
.listxattr = gfs2_listxattr,
.removexattr = gfs2_removexattr,
.fiemap = gfs2_fiemap,
.check_acl = gfs2_check_acl,
.get_acl = gfs2_get_acl,
};
const struct inode_operations gfs2_symlink_iops = {
@ -1882,6 +1882,6 @@ const struct inode_operations gfs2_symlink_iops = {
.listxattr = gfs2_listxattr,
.removexattr = gfs2_removexattr,
.fiemap = gfs2_fiemap,
.check_acl = gfs2_check_acl,
.get_acl = gfs2_get_acl,
};

18
fs/jffs2/acl.c
View File

@ -156,7 +156,7 @@ static void *jffs2_acl_to_medium(const struct posix_acl *acl, size_t *size)
return ERR_PTR(-EINVAL);
}
static struct posix_acl *jffs2_get_acl(struct inode *inode, int type)
struct posix_acl *jffs2_get_acl(struct inode *inode, int type)
{
struct posix_acl *acl;
char *value = NULL;
@ -259,22 +259,6 @@ static int jffs2_set_acl(struct inode *inode, int type, struct posix_acl *acl)
return rc;
}
int jffs2_check_acl(struct inode *inode, int mask)
{
struct posix_acl *acl;
int rc;
acl = jffs2_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl) {
rc = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
return rc;
}
return -EAGAIN;
}
int jffs2_init_acl_pre(struct inode *dir_i, struct inode *inode, mode_t *i_mode)
{
struct posix_acl *acl;

4
fs/jffs2/acl.h
View File

@ -26,7 +26,7 @@ struct jffs2_acl_header {
#ifdef CONFIG_JFFS2_FS_POSIX_ACL
extern int jffs2_check_acl(struct inode *, int);
struct posix_acl *jffs2_get_acl(struct inode *inode, int type);
extern int jffs2_acl_chmod(struct inode *);
extern int jffs2_init_acl_pre(struct inode *, struct inode *, mode_t *);
extern int jffs2_init_acl_post(struct inode *);
@ -36,7 +36,7 @@ extern const struct xattr_handler jffs2_acl_default_xattr_handler;
#else
#define jffs2_check_acl (NULL)
#define jffs2_get_acl (NULL)
#define jffs2_acl_chmod(inode) (0)
#define jffs2_init_acl_pre(dir_i,inode,mode) (0)
#define jffs2_init_acl_post(inode) (0)

2
fs/jffs2/dir.c
View File

@ -56,7 +56,7 @@ const struct inode_operations jffs2_dir_inode_operations =
.rmdir = jffs2_rmdir,
.mknod = jffs2_mknod,
.rename = jffs2_rename,
.check_acl = jffs2_check_acl,
.get_acl = jffs2_get_acl,
.setattr = jffs2_setattr,
.setxattr = jffs2_setxattr,
.getxattr = jffs2_getxattr,

2
fs/jffs2/file.c
View File

@ -63,7 +63,7 @@ const struct file_operations jffs2_file_operations =
const struct inode_operations jffs2_file_inode_operations =
{
.check_acl = jffs2_check_acl,
.get_acl = jffs2_get_acl,
.setattr = jffs2_setattr,
.setxattr = jffs2_setxattr,
.getxattr = jffs2_getxattr,

2
fs/jffs2/symlink.c
View File

@ -20,7 +20,7 @@ const struct inode_operations jffs2_symlink_inode_operations =
{
.readlink = generic_readlink,
.follow_link = jffs2_follow_link,
.check_acl = jffs2_check_acl,
.get_acl = jffs2_get_acl,
.setattr = jffs2_setattr,
.setxattr = jffs2_setxattr,
.getxattr = jffs2_getxattr,

18
fs/jfs/acl.c
View File

@ -27,7 +27,7 @@
#include "jfs_xattr.h"
#include "jfs_acl.h"
static struct posix_acl *jfs_get_acl(struct inode *inode, int type)
struct posix_acl *jfs_get_acl(struct inode *inode, int type)
{
struct posix_acl *acl;
char *ea_name;
@ -114,22 +114,6 @@ static int jfs_set_acl(tid_t tid, struct inode *inode, int type,
return rc;
}
int jfs_check_acl(struct inode *inode, int mask)
{
struct posix_acl *acl;
acl = jfs_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl) {
int error = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
return error;
}
return -EAGAIN;
}
int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir)
{
struct posix_acl *acl = NULL;

2
fs/jfs/file.c
View File

@ -140,7 +140,7 @@ const struct inode_operations jfs_file_inode_operations = {
.removexattr = jfs_removexattr,
.setattr = jfs_setattr,
#ifdef CONFIG_JFS_POSIX_ACL
.check_acl = jfs_check_acl,
.get_acl = jfs_get_acl,
#endif
};

2
fs/jfs/jfs_acl.h
View File

@ -20,7 +20,7 @@
#ifdef CONFIG_JFS_POSIX_ACL
int jfs_check_acl(struct inode *, int);
struct posix_acl *jfs_get_acl(struct inode *inode, int type);
int jfs_init_acl(tid_t, struct inode *, struct inode *);
int jfs_acl_chmod(struct inode *inode);

2
fs/jfs/namei.c
View File

@ -1537,7 +1537,7 @@ const struct inode_operations jfs_dir_inode_operations = {
.removexattr = jfs_removexattr,
.setattr = jfs_setattr,
#ifdef CONFIG_JFS_POSIX_ACL
.check_acl = jfs_check_acl,
.get_acl = jfs_get_acl,
#endif
};

24
fs/namei.c
View File

@ -196,20 +196,22 @@ static int check_acl(struct inode *inode, int mask)
acl = get_cached_acl(inode, ACL_TYPE_ACCESS);
/*
* A filesystem can force a ACL callback by just never
* filling the ACL cache. But normally you'd fill the
* cache either at inode instantiation time, or on the
* first ->check_acl call.
* A filesystem can force a ACL callback by just never filling the
* ACL cache. But normally you'd fill the cache either at inode
* instantiation time, or on the first ->get_acl call.
*
* If the filesystem doesn't have a check_acl() function
* at all, we'll just create the negative cache entry.
* If the filesystem doesn't have a get_acl() function at all, we'll
* just create the negative cache entry.
*/
if (acl == ACL_NOT_CACHED) {
if (inode->i_op->check_acl)
return inode->i_op->check_acl(inode, mask);
set_cached_acl(inode, ACL_TYPE_ACCESS, NULL);
return -EAGAIN;
if (inode->i_op->get_acl) {
acl = inode->i_op->get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl))
return PTR_ERR(acl);
} else {
set_cached_acl(inode, ACL_TYPE_ACCESS, NULL);
return -EAGAIN;
}
}
if (acl) {

24
fs/ocfs2/acl.c
View File

@ -290,7 +290,7 @@ static int ocfs2_set_acl(handle_t *handle,
return ret;
}
int ocfs2_check_acl(struct inode *inode, int mask)
struct posix_acl *ocfs2_iop_get_acl(struct inode *inode, int type)
{
struct ocfs2_super *osb;
struct buffer_head *di_bh = NULL;
@ -299,29 +299,17 @@ int ocfs2_check_acl(struct inode *inode, int mask)
osb = OCFS2_SB(inode->i_sb);
if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL))
return ret;
return NULL;
ret = ocfs2_read_inode_block(inode, &di_bh);
if (ret < 0) {
mlog_errno(ret);
return ret;
}
if (ret < 0)
return ERR_PTR(ret);
acl = ocfs2_get_acl_nolock(inode, ACL_TYPE_ACCESS, di_bh);
acl = ocfs2_get_acl_nolock(inode, type, di_bh);
brelse(di_bh);
if (IS_ERR(acl)) {
mlog_errno(PTR_ERR(acl));
return PTR_ERR(acl);
}
if (acl) {
ret = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
return ret;
}
return -EAGAIN;
return acl;
}
int ocfs2_acl_chmod(struct inode *inode)

2
fs/ocfs2/acl.h
View File

@ -26,7 +26,7 @@ struct ocfs2_acl_entry {
__le32 e_id;
};
extern int ocfs2_check_acl(struct inode *, int);
struct posix_acl *ocfs2_iop_get_acl(struct inode *inode, int type);
extern int ocfs2_acl_chmod(struct inode *);
extern int ocfs2_init_acl(handle_t *, struct inode *, struct inode *,
struct buffer_head *, struct buffer_head *,

4
fs/ocfs2/file.c
View File

@ -2600,14 +2600,14 @@ const struct inode_operations ocfs2_file_iops = {
.listxattr = ocfs2_listxattr,
.removexattr = generic_removexattr,
.fiemap = ocfs2_fiemap,
.check_acl = ocfs2_check_acl,
.get_acl = ocfs2_iop_get_acl,
};
const struct inode_operations ocfs2_special_file_iops = {
.setattr = ocfs2_setattr,
.getattr = ocfs2_getattr,
.permission = ocfs2_permission,
.check_acl = ocfs2_check_acl,
.get_acl = ocfs2_iop_get_acl,
};
/*

2
fs/ocfs2/namei.c
View File

@ -2498,5 +2498,5 @@ const struct inode_operations ocfs2_dir_iops = {
.listxattr = ocfs2_listxattr,
.removexattr = generic_removexattr,
.fiemap = ocfs2_fiemap,
.check_acl = ocfs2_check_acl,
.get_acl = ocfs2_iop_get_acl,
};

1
fs/posix_acl.c
View File

@ -27,7 +27,6 @@ EXPORT_SYMBOL(posix_acl_alloc);
EXPORT_SYMBOL(posix_acl_valid);
EXPORT_SYMBOL(posix_acl_equiv_mode);
EXPORT_SYMBOL(posix_acl_from_mode);
EXPORT_SYMBOL(posix_acl_permission);
/*
* Init a fresh posix_acl

2
fs/reiserfs/file.c
View File

@ -319,5 +319,5 @@ const struct inode_operations reiserfs_file_inode_operations = {
.listxattr = reiserfs_listxattr,
.removexattr = reiserfs_removexattr,
.permission = reiserfs_permission,
.check_acl = reiserfs_check_acl,
.get_acl = reiserfs_get_acl,
};

6
fs/reiserfs/namei.c
View File

@ -1529,7 +1529,7 @@ const struct inode_operations reiserfs_dir_inode_operations = {
.listxattr = reiserfs_listxattr,
.removexattr = reiserfs_removexattr,
.permission = reiserfs_permission,
.check_acl = reiserfs_check_acl,
.get_acl = reiserfs_get_acl,
};
/*
@ -1546,7 +1546,7 @@ const struct inode_operations reiserfs_symlink_inode_operations = {
.listxattr = reiserfs_listxattr,
.removexattr = reiserfs_removexattr,
.permission = reiserfs_permission,
.check_acl = reiserfs_check_acl,
.get_acl = reiserfs_get_acl,
};
@ -1560,5 +1560,5 @@ const struct inode_operations reiserfs_special_inode_operations = {
.listxattr = reiserfs_listxattr,
.removexattr = reiserfs_removexattr,
.permission = reiserfs_permission,
.check_acl = reiserfs_check_acl,
.get_acl = reiserfs_get_acl,
};

18
fs/reiserfs/xattr.c
View File

@ -867,24 +867,6 @@ ssize_t reiserfs_listxattr(struct dentry * dentry, char *buffer, size_t size)
return err;
}
int reiserfs_check_acl(struct inode *inode, int mask)
{
struct posix_acl *acl;
int error = -EAGAIN; /* do regular unix permission checks by default */
acl = reiserfs_get_acl(inode, ACL_TYPE_ACCESS);
if (acl) {
if (!IS_ERR(acl)) {
error = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
} else if (PTR_ERR(acl) != -ENODATA)
error = PTR_ERR(acl);
}
return error;
}
static int create_privroot(struct dentry *dentry)
{
int err;

21
fs/xfs/linux-2.6/xfs_acl.c
View File

@ -114,6 +114,8 @@ xfs_get_acl(struct inode *inode, int type)
if (acl != ACL_NOT_CACHED)
return acl;
trace_xfs_get_acl(ip);
switch (type) {
case ACL_TYPE_ACCESS:
ea_name = SGI_ACL_FILE;
@ -218,25 +220,6 @@ xfs_set_acl(struct inode *inode, int type, struct posix_acl *acl)
return error;
}
int
xfs_check_acl(struct inode *inode, int mask)
{
struct posix_acl *acl;
int error = -EAGAIN;
trace_xfs_check_acl(XFS_I(inode));
acl = xfs_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl) {
error = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);
}
return error;
}
static int
xfs_set_mode(struct inode *inode, mode_t mode)
{

8
fs/xfs/linux-2.6/xfs_iops.c
View File

@ -1022,7 +1022,7 @@ xfs_vn_fiemap(
}
static const struct inode_operations xfs_inode_operations = {
.check_acl = xfs_check_acl,
.get_acl = xfs_get_acl,
.getattr = xfs_vn_getattr,
.setattr = xfs_vn_setattr,
.setxattr = generic_setxattr,
@ -1048,7 +1048,7 @@ static const struct inode_operations xfs_dir_inode_operations = {
.rmdir = xfs_vn_unlink,
.mknod = xfs_vn_mknod,
.rename = xfs_vn_rename,
.check_acl = xfs_check_acl,
.get_acl = xfs_get_acl,
.getattr = xfs_vn_getattr,
.setattr = xfs_vn_setattr,
.setxattr = generic_setxattr,
@ -1073,7 +1073,7 @@ static const struct inode_operations xfs_dir_ci_inode_operations = {
.rmdir = xfs_vn_unlink,
.mknod = xfs_vn_mknod,
.rename = xfs_vn_rename,
.check_acl = xfs_check_acl,
.get_acl = xfs_get_acl,
.getattr = xfs_vn_getattr,
.setattr = xfs_vn_setattr,
.setxattr = generic_setxattr,
@ -1086,7 +1086,7 @@ static const struct inode_operations xfs_symlink_inode_operations = {
.readlink = generic_readlink,
.follow_link = xfs_vn_follow_link,
.put_link = xfs_vn_put_link,
.check_acl = xfs_check_acl,
.get_acl = xfs_get_acl,
.getattr = xfs_vn_getattr,
.setattr = xfs_vn_setattr,
.setxattr = generic_setxattr,

2
fs/xfs/linux-2.6/xfs_trace.h
View File

@ -571,7 +571,7 @@ DEFINE_INODE_EVENT(xfs_alloc_file_space);
DEFINE_INODE_EVENT(xfs_free_file_space);
DEFINE_INODE_EVENT(xfs_readdir);
#ifdef CONFIG_XFS_POSIX_ACL
DEFINE_INODE_EVENT(xfs_check_acl);
DEFINE_INODE_EVENT(xfs_get_acl);
#endif
DEFINE_INODE_EVENT(xfs_vm_bmap);
DEFINE_INODE_EVENT(xfs_file_ioctl);

2
fs/xfs/xfs_acl.h
View File

@ -42,7 +42,6 @@ struct xfs_acl {
#define SGI_ACL_DEFAULT_SIZE (sizeof(SGI_ACL_DEFAULT)-1)
#ifdef CONFIG_XFS_POSIX_ACL
extern int xfs_check_acl(struct inode *inode, int mask);
extern struct posix_acl *xfs_get_acl(struct inode *inode, int type);
extern int xfs_inherit_acl(struct inode *inode, struct posix_acl *default_acl);
extern int xfs_acl_chmod(struct inode *inode);
@ -52,7 +51,6 @@ extern int posix_acl_default_exists(struct inode *inode);
extern const struct xattr_handler xfs_xattr_acl_access_handler;
extern const struct xattr_handler xfs_xattr_acl_default_handler;
#else
# define xfs_check_acl NULL
# define xfs_get_acl(inode, type) NULL
# define xfs_inherit_acl(inode, default_acl) 0
# define xfs_acl_chmod(inode) 0

2
include/linux/fs.h
View File

@ -1586,7 +1586,7 @@ struct inode_operations {
struct dentry * (*lookup) (struct inode *,struct dentry *, struct nameidata *);
void * (*follow_link) (struct dentry *, struct nameidata *);
int (*permission) (struct inode *, int);
int (*check_acl)(struct inode *, int);
struct posix_acl * (*get_acl)(struct inode *, int);
int (*readlink) (struct dentry *, char __user *,int);
void (*put_link) (struct dentry *, struct nameidata *, void *);

1
include/linux/generic_acl.h
View File

@ -10,6 +10,5 @@ extern const struct xattr_handler generic_acl_default_handler;
int generic_acl_init(struct inode *, struct inode *);
int generic_acl_chmod(struct inode *);
int generic_check_acl(struct inode *inode, int mask);
#endif /* LINUX_GENERIC_ACL_H */

6
include/linux/reiserfs_acl.h
View File

@ -59,11 +59,7 @@ extern const struct xattr_handler reiserfs_posix_acl_access_handler;
#else
#define reiserfs_cache_default_acl(inode) 0
static inline struct posix_acl *reiserfs_get_acl(struct inode *inode, int type)
{
return NULL;
}
#define reiserfs_get_acl NULL
static inline int reiserfs_acl_chmod(struct inode *inode)
{

2
include/linux/reiserfs_xattr.h
View File

@ -45,7 +45,6 @@ int reiserfs_permission(struct inode *inode, int mask);
#ifdef CONFIG_REISERFS_FS_XATTR
#define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir)
int reiserfs_check_acl(struct inode *inode, int mask);
ssize_t reiserfs_getxattr(struct dentry *dentry, const char *name,
void *buffer, size_t size);
int reiserfs_setxattr(struct dentry *dentry, const char *name,
@ -123,7 +122,6 @@ static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
#define reiserfs_setxattr NULL
#define reiserfs_listxattr NULL
#define reiserfs_removexattr NULL
#define reiserfs_check_acl NULL
static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
{

6
mm/shmem.c
View File

@ -2715,10 +2715,6 @@ static const struct inode_operations shmem_inode_operations = {
.listxattr = shmem_listxattr,
.removexattr = shmem_removexattr,
#endif
#ifdef CONFIG_TMPFS_POSIX_ACL
.check_acl = generic_check_acl,
#endif
};
static const struct inode_operations shmem_dir_inode_operations = {
@ -2741,7 +2737,6 @@ static const struct inode_operations shmem_dir_inode_operations = {
#endif
#ifdef CONFIG_TMPFS_POSIX_ACL
.setattr = shmem_setattr,
.check_acl = generic_check_acl,
#endif
};
@ -2754,7 +2749,6 @@ static const struct inode_operations shmem_special_inode_operations = {
#endif
#ifdef CONFIG_TMPFS_POSIX_ACL
.setattr = shmem_setattr,
.check_acl = generic_check_acl,
#endif
};