diff options
Diffstat (limited to 'fs/generic_acl.c')
| -rw-r--r-- | fs/generic_acl.c | 197 |
1 files changed, 0 insertions, 197 deletions
diff --git a/fs/generic_acl.c b/fs/generic_acl.c deleted file mode 100644 index 995d63b2e74..00000000000 --- a/fs/generic_acl.c +++ /dev/null @@ -1,197 +0,0 @@ -/* - * fs/generic_acl.c - * - * (C) 2005 Andreas Gruenbacher <agruen@suse.de> - * - * This file is released under the GPL. - */ - -#include <linux/sched.h> -#include <linux/fs.h> -#include <linux/generic_acl.h> - -/** - * generic_acl_list - Generic xattr_handler->list() operation - * @ops: Filesystem specific getacl and setacl callbacks - */ -size_t -generic_acl_list(struct inode *inode, struct generic_acl_operations *ops, - int type, char *list, size_t list_size) -{ - struct posix_acl *acl; - const char *name; - size_t size; - - acl = ops->getacl(inode, type); - if (!acl) - return 0; - posix_acl_release(acl); - - switch(type) { - case ACL_TYPE_ACCESS: - name = POSIX_ACL_XATTR_ACCESS; - break; - - case ACL_TYPE_DEFAULT: - name = POSIX_ACL_XATTR_DEFAULT; - break; - - default: - return 0; - } - size = strlen(name) + 1; - if (list && size <= list_size) - memcpy(list, name, size); - return size; -} - -/** - * generic_acl_get - Generic xattr_handler->get() operation - * @ops: Filesystem specific getacl and setacl callbacks - */ -int -generic_acl_get(struct inode *inode, struct generic_acl_operations *ops, - int type, void *buffer, size_t size) -{ - struct posix_acl *acl; - int error; - - acl = ops->getacl(inode, type); - if (!acl) - return -ENODATA; - error = posix_acl_to_xattr(acl, buffer, size); - posix_acl_release(acl); - - return error; -} - -/** - * generic_acl_set - Generic xattr_handler->set() operation - * @ops: Filesystem specific getacl and setacl callbacks - */ -int -generic_acl_set(struct inode *inode, struct generic_acl_operations *ops, - int type, const void *value, size_t size) -{ - struct posix_acl *acl = NULL; - int error; - - if (S_ISLNK(inode->i_mode)) - return -EOPNOTSUPP; - if (!is_owner_or_cap(inode)) - return -EPERM; - if (value) { - acl = posix_acl_from_xattr(value, size); - if (IS_ERR(acl)) - return PTR_ERR(acl); - } - if (acl) { - mode_t mode; - - error = posix_acl_valid(acl); - if (error) - goto failed; - switch(type) { - case ACL_TYPE_ACCESS: - mode = inode->i_mode; - error = posix_acl_equiv_mode(acl, &mode); - if (error < 0) - goto failed; - inode->i_mode = mode; - if (error == 0) { - posix_acl_release(acl); - acl = NULL; - } - break; - - case ACL_TYPE_DEFAULT: - if (!S_ISDIR(inode->i_mode)) { - error = -EINVAL; - goto failed; - } - break; - } - } - ops->setacl(inode, type, acl); - error = 0; -failed: - posix_acl_release(acl); - return error; -} - -/** - * generic_acl_init - Take care of acl inheritance at @inode create time - * @ops: Filesystem specific getacl and setacl callbacks - * - * Files created inside a directory with a default ACL inherit the - * directory's default ACL. - */ -int -generic_acl_init(struct inode *inode, struct inode *dir, - struct generic_acl_operations *ops) -{ - struct posix_acl *acl = NULL; - mode_t mode = inode->i_mode; - int error; - - inode->i_mode = mode & ~current->fs->umask; - if (!S_ISLNK(inode->i_mode)) - acl = ops->getacl(dir, ACL_TYPE_DEFAULT); - if (acl) { - struct posix_acl *clone; - - if (S_ISDIR(inode->i_mode)) { - clone = posix_acl_clone(acl, GFP_KERNEL); - error = -ENOMEM; - if (!clone) - goto cleanup; - ops->setacl(inode, ACL_TYPE_DEFAULT, clone); - posix_acl_release(clone); - } - clone = posix_acl_clone(acl, GFP_KERNEL); - error = -ENOMEM; - if (!clone) - goto cleanup; - error = posix_acl_create_masq(clone, &mode); - if (error >= 0) { - inode->i_mode = mode; - if (error > 0) - ops->setacl(inode, ACL_TYPE_ACCESS, clone); - } - posix_acl_release(clone); - } - error = 0; - -cleanup: - posix_acl_release(acl); - return error; -} - -/** - * generic_acl_chmod - change the access acl of @inode upon chmod() - * @ops: FIlesystem specific getacl and setacl callbacks - * - * A chmod also changes the permissions of the owner, group/mask, and - * other ACL entries. - */ -int -generic_acl_chmod(struct inode *inode, struct generic_acl_operations *ops) -{ - struct posix_acl *acl, *clone; - int error = 0; - - if (S_ISLNK(inode->i_mode)) - return -EOPNOTSUPP; - acl = ops->getacl(inode, ACL_TYPE_ACCESS); - if (acl) { - clone = posix_acl_clone(acl, GFP_KERNEL); - posix_acl_release(acl); - if (!clone) - return -ENOMEM; - error = posix_acl_chmod_masq(clone, inode->i_mode); - if (!error) - ops->setacl(inode, ACL_TYPE_ACCESS, clone); - posix_acl_release(clone); - } - return error; -} |