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- /*
- * Copyright (C) 2007 Red Hat. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License v2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- */
- #include <linux/fs.h>
- #include <linux/string.h>
- #include <linux/xattr.h>
- #include <linux/posix_acl_xattr.h>
- #include <linux/sched.h>
- #include "ctree.h"
- #include "xattr.h"
- #ifndef is_owner_or_cap
- #define is_owner_or_cap(inode) \
- ((current->fsuid == (inode)->i_uid) || capable(CAP_FOWNER))
- #endif
- static int btrfs_xattr_set_acl(struct inode *inode, int type,
- const void *value, size_t size)
- {
- int ret = 0;
- struct posix_acl *acl;
- if (!is_owner_or_cap(inode))
- return -EPERM;
- if (value) {
- acl = posix_acl_from_xattr(value, size);
- if (acl == NULL) {
- value = NULL;
- size = 0;
- } else if (IS_ERR(acl)) {
- ret = PTR_ERR(acl);
- } else {
- ret = posix_acl_valid(acl);
- posix_acl_release(acl);
- }
- if (ret)
- return ret;
- }
- return btrfs_xattr_set(inode, type, "", value, size, 0);
- }
- static int btrfs_xattr_get_acl(struct inode *inode, int type,
- void *value, size_t size)
- {
- return btrfs_xattr_get(inode, type, "", value, size);
- }
- static int btrfs_xattr_acl_access_get(struct inode *inode, const char *name,
- void *value, size_t size)
- {
- if (*name != '\0')
- return -EINVAL;
- return btrfs_xattr_get_acl(inode, BTRFS_XATTR_INDEX_POSIX_ACL_ACCESS,
- value, size);
- }
- static int btrfs_xattr_acl_access_set(struct inode *inode, const char *name,
- const void *value, size_t size, int flags)
- {
- if (*name != '\0')
- return -EINVAL;
- return btrfs_xattr_set_acl(inode, BTRFS_XATTR_INDEX_POSIX_ACL_ACCESS,
- value, size);
- }
- static int btrfs_xattr_acl_default_get(struct inode *inode, const char *name,
- void *value, size_t size)
- {
- if (*name != '\0')
- return -EINVAL;
- return btrfs_xattr_get_acl(inode, BTRFS_XATTR_INDEX_POSIX_ACL_DEFAULT,
- value, size);
- }
- static int btrfs_xattr_acl_default_set(struct inode *inode, const char *name,
- const void *value, size_t size, int flags)
- {
- if (*name != '\0')
- return -EINVAL;
- return btrfs_xattr_set_acl(inode, BTRFS_XATTR_INDEX_POSIX_ACL_DEFAULT,
- value, size);
- }
- struct xattr_handler btrfs_xattr_acl_default_handler = {
- .prefix = POSIX_ACL_XATTR_DEFAULT,
- .list = btrfs_xattr_generic_list,
- .get = btrfs_xattr_acl_default_get,
- .set = btrfs_xattr_acl_default_set,
- };
- struct xattr_handler btrfs_xattr_acl_access_handler = {
- .prefix = POSIX_ACL_XATTR_ACCESS,
- .list = btrfs_xattr_generic_list,
- .get = btrfs_xattr_acl_access_get,
- .set = btrfs_xattr_acl_access_set,
- };
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