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ext2/3/4: use generic posix ACL infrastructure

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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1 parent 996a710 commit 64e178a7118b1cf7648391755e44dcc209091003 Christoph Hellwig committed with Al Viro Dec 20, 2013
Showing with 100 additions and 605 deletions.
  1. +14 −174 fs/ext2/acl.c
  2. +1 −7 fs/ext2/acl.h
  3. +1 −0 fs/ext2/file.c
  4. +1 −1 fs/ext2/inode.c
  5. +2 −0 fs/ext2/namei.c
  6. +4 −4 fs/ext2/xattr.c
  7. +0 −2 fs/ext2/xattr.h
  8. +29 −194 fs/ext3/acl.c
  9. +2 −7 fs/ext3/acl.h
  10. +1 −0 fs/ext3/file.c
  11. +1 −1 fs/ext3/inode.c
  12. +2 −0 fs/ext3/namei.c
  13. +4 −4 fs/ext3/xattr.c
  14. +0 −2 fs/ext3/xattr.h
  15. +28 −195 fs/ext4/acl.c
  16. +2 −7 fs/ext4/acl.h
  17. +1 −0 fs/ext4/file.c
  18. +1 −1 fs/ext4/inode.c
  19. +2 −0 fs/ext4/namei.c
  20. +4 −4 fs/ext4/xattr.c
  21. +0 −2 fs/ext4/xattr.h
View
@@ -148,13 +148,6 @@ ext2_get_acl(struct inode *inode, int type)
struct posix_acl *acl;
int retval;
- if (!test_opt(inode->i_sb, POSIX_ACL))
- return NULL;
-
- acl = get_cached_acl(inode, type);
- if (acl != ACL_NOT_CACHED)
- return acl;
-
switch (type) {
case ACL_TYPE_ACCESS:
name_index = EXT2_XATTR_INDEX_POSIX_ACL_ACCESS;
@@ -189,19 +182,14 @@ ext2_get_acl(struct inode *inode, int type)
/*
* inode->i_mutex: down
*/
-static int
-ext2_set_acl(struct inode *inode, int type, struct posix_acl *acl)
+int
+ext2_set_acl(struct inode *inode, struct posix_acl *acl, int type)
{
int name_index;
void *value = NULL;
size_t size = 0;
int error;
- if (S_ISLNK(inode->i_mode))
- return -EOPNOTSUPP;
- if (!test_opt(inode->i_sb, POSIX_ACL))
- return 0;
-
switch(type) {
case ACL_TYPE_ACCESS:
name_index = EXT2_XATTR_INDEX_POSIX_ACL_ACCESS;
@@ -250,169 +238,21 @@ ext2_set_acl(struct inode *inode, int type, struct posix_acl *acl)
int
ext2_init_acl(struct inode *inode, struct inode *dir)
{
- struct posix_acl *acl = NULL;
- int error = 0;
-
- if (!S_ISLNK(inode->i_mode)) {
- if (test_opt(dir->i_sb, POSIX_ACL)) {
- acl = ext2_get_acl(dir, ACL_TYPE_DEFAULT);
- if (IS_ERR(acl))
- return PTR_ERR(acl);
- }
- if (!acl)
- inode->i_mode &= ~current_umask();
- }
- if (test_opt(inode->i_sb, POSIX_ACL) && acl) {
- if (S_ISDIR(inode->i_mode)) {
- error = ext2_set_acl(inode, ACL_TYPE_DEFAULT, acl);
- if (error)
- goto cleanup;
- }
- error = __posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
- if (error < 0)
- return error;
- if (error > 0) {
- /* This is an extended ACL */
- error = ext2_set_acl(inode, ACL_TYPE_ACCESS, acl);
- }
- }
-cleanup:
- posix_acl_release(acl);
- return error;
-}
-
-/*
- * Does chmod for an inode that may have an Access Control List. The
- * inode->i_mode field must be updated to the desired value by the caller
- * before calling this function.
- * Returns 0 on success, or a negative error number.
- *
- * We change the ACL rather than storing some ACL entries in the file
- * mode permission bits (which would be more efficient), because that
- * would break once additional permissions (like ACL_APPEND, ACL_DELETE
- * for directories) are added. There are no more bits available in the
- * file mode.
- *
- * inode->i_mutex: down
- */
-int
-ext2_acl_chmod(struct inode *inode)
-{
- struct posix_acl *acl;
- int error;
+ struct posix_acl *default_acl, *acl;
+ int error;
- if (!test_opt(inode->i_sb, POSIX_ACL))
- return 0;
- if (S_ISLNK(inode->i_mode))
- return -EOPNOTSUPP;
- acl = ext2_get_acl(inode, ACL_TYPE_ACCESS);
- if (IS_ERR(acl) || !acl)
- return PTR_ERR(acl);
- error = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
+ error = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
if (error)
return error;
- error = ext2_set_acl(inode, ACL_TYPE_ACCESS, acl);
- posix_acl_release(acl);
- return error;
-}
-/*
- * Extended attribut handlers
- */
-static size_t
-ext2_xattr_list_acl_access(struct dentry *dentry, char *list, size_t list_size,
- const char *name, size_t name_len, int type)
-{
- const size_t size = sizeof(POSIX_ACL_XATTR_ACCESS);
-
- if (!test_opt(dentry->d_sb, POSIX_ACL))
- return 0;
- if (list && size <= list_size)
- memcpy(list, POSIX_ACL_XATTR_ACCESS, size);
- return size;
-}
-
-static size_t
-ext2_xattr_list_acl_default(struct dentry *dentry, char *list, size_t list_size,
- const char *name, size_t name_len, int type)
-{
- const size_t size = sizeof(POSIX_ACL_XATTR_DEFAULT);
-
- if (!test_opt(dentry->d_sb, POSIX_ACL))
- return 0;
- if (list && size <= list_size)
- memcpy(list, POSIX_ACL_XATTR_DEFAULT, size);
- return size;
-}
-
-static int
-ext2_xattr_get_acl(struct dentry *dentry, const char *name, void *buffer,
- size_t size, int type)
-{
- struct posix_acl *acl;
- int error;
-
- if (strcmp(name, "") != 0)
- return -EINVAL;
- if (!test_opt(dentry->d_sb, POSIX_ACL))
- return -EOPNOTSUPP;
-
- acl = ext2_get_acl(dentry->d_inode, type);
- if (IS_ERR(acl))
- return PTR_ERR(acl);
- if (acl == NULL)
- return -ENODATA;
- error = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
- posix_acl_release(acl);
-
- return error;
-}
-
-static int
-ext2_xattr_set_acl(struct dentry *dentry, const char *name, const void *value,
- size_t size, int flags, int type)
-{
- struct posix_acl *acl;
- int error;
-
- if (strcmp(name, "") != 0)
- return -EINVAL;
- if (!test_opt(dentry->d_sb, POSIX_ACL))
- return -EOPNOTSUPP;
- if (!inode_owner_or_capable(dentry->d_inode))
- return -EPERM;
-
- if (value) {
- acl = posix_acl_from_xattr(&init_user_ns, value, size);
- if (IS_ERR(acl))
- return PTR_ERR(acl);
- else if (acl) {
- error = posix_acl_valid(acl);
- if (error)
- goto release_and_out;
- }
- } else
- acl = NULL;
-
- error = ext2_set_acl(dentry->d_inode, type, acl);
-
-release_and_out:
- posix_acl_release(acl);
+ if (default_acl) {
+ error = ext2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
+ posix_acl_release(default_acl);
+ }
+ if (acl) {
+ if (!error)
+ error = ext2_set_acl(inode, acl, ACL_TYPE_ACCESS);
+ posix_acl_release(acl);
+ }
return error;
}
-
-const struct xattr_handler ext2_xattr_acl_access_handler = {
- .prefix = POSIX_ACL_XATTR_ACCESS,
- .flags = ACL_TYPE_ACCESS,
- .list = ext2_xattr_list_acl_access,
- .get = ext2_xattr_get_acl,
- .set = ext2_xattr_set_acl,
-};
-
-const struct xattr_handler ext2_xattr_acl_default_handler = {
- .prefix = POSIX_ACL_XATTR_DEFAULT,
- .flags = ACL_TYPE_DEFAULT,
- .list = ext2_xattr_list_acl_default,
- .get = ext2_xattr_get_acl,
- .set = ext2_xattr_set_acl,
-};
View
@@ -55,20 +55,14 @@ static inline int ext2_acl_count(size_t size)
/* acl.c */
extern struct posix_acl *ext2_get_acl(struct inode *inode, int type);
-extern int ext2_acl_chmod (struct inode *);
+extern int ext2_set_acl(struct inode *inode, struct posix_acl *acl, int type);
extern int ext2_init_acl (struct inode *, struct inode *);
#else
#include <linux/sched.h>
#define ext2_get_acl NULL
#define ext2_set_acl NULL
-static inline int
-ext2_acl_chmod (struct inode *inode)
-{
- return 0;
-}
-
static inline int ext2_init_acl (struct inode *inode, struct inode *dir)
{
return 0;
View
@@ -103,5 +103,6 @@ const struct inode_operations ext2_file_inode_operations = {
#endif
.setattr = ext2_setattr,
.get_acl = ext2_get_acl,
+ .set_acl = ext2_set_acl,
.fiemap = ext2_fiemap,
};
View
@@ -1566,7 +1566,7 @@ int ext2_setattr(struct dentry *dentry, struct iattr *iattr)
}
setattr_copy(inode, iattr);
if (iattr->ia_valid & ATTR_MODE)
- error = ext2_acl_chmod(inode);
+ error = posix_acl_chmod(inode, inode->i_mode);
mark_inode_dirty(inode);
return error;
View
@@ -421,6 +421,7 @@ const struct inode_operations ext2_dir_inode_operations = {
#endif
.setattr = ext2_setattr,
.get_acl = ext2_get_acl,
+ .set_acl = ext2_set_acl,
.tmpfile = ext2_tmpfile,
};
@@ -433,4 +434,5 @@ const struct inode_operations ext2_special_inode_operations = {
#endif
.setattr = ext2_setattr,
.get_acl = ext2_get_acl,
+ .set_acl = ext2_set_acl,
};
View
@@ -103,8 +103,8 @@ static struct mb_cache *ext2_xattr_cache;
static const struct xattr_handler *ext2_xattr_handler_map[] = {
[EXT2_XATTR_INDEX_USER] = &ext2_xattr_user_handler,
#ifdef CONFIG_EXT2_FS_POSIX_ACL
- [EXT2_XATTR_INDEX_POSIX_ACL_ACCESS] = &ext2_xattr_acl_access_handler,
- [EXT2_XATTR_INDEX_POSIX_ACL_DEFAULT] = &ext2_xattr_acl_default_handler,
+ [EXT2_XATTR_INDEX_POSIX_ACL_ACCESS] = &posix_acl_access_xattr_handler,
+ [EXT2_XATTR_INDEX_POSIX_ACL_DEFAULT] = &posix_acl_default_xattr_handler,
#endif
[EXT2_XATTR_INDEX_TRUSTED] = &ext2_xattr_trusted_handler,
#ifdef CONFIG_EXT2_FS_SECURITY
@@ -116,8 +116,8 @@ const struct xattr_handler *ext2_xattr_handlers[] = {
&ext2_xattr_user_handler,
&ext2_xattr_trusted_handler,
#ifdef CONFIG_EXT2_FS_POSIX_ACL
- &ext2_xattr_acl_access_handler,
- &ext2_xattr_acl_default_handler,
+ &posix_acl_access_xattr_handler,
+ &posix_acl_default_xattr_handler,
#endif
#ifdef CONFIG_EXT2_FS_SECURITY
&ext2_xattr_security_handler,
View
@@ -57,8 +57,6 @@ struct ext2_xattr_entry {
extern const struct xattr_handler ext2_xattr_user_handler;
extern const struct xattr_handler ext2_xattr_trusted_handler;
-extern const struct xattr_handler ext2_xattr_acl_access_handler;
-extern const struct xattr_handler ext2_xattr_acl_default_handler;
extern const struct xattr_handler ext2_xattr_security_handler;
extern ssize_t ext2_listxattr(struct dentry *, char *, size_t);
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