diff options
Diffstat (limited to 'mm/shmem_acl.c')
-rw-r--r-- | mm/shmem_acl.c | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/mm/shmem_acl.c b/mm/shmem_acl.c deleted file mode 100644 index f8d5330ec0d7..000000000000 --- a/mm/shmem_acl.c +++ /dev/null @@ -1,133 +0,0 @@ -/* - * mm/shmem_acl.c - * - * (C) 2005 Andreas Gruenbacher <agruen@suse.de> - * - * This file is released under the GPL. - */ - -#include <linux/fs.h> -#include <linux/shmem_fs.h> -#include <linux/xattr.h> -#include <linux/generic_acl.h> - -/** - * shmem_get_acl - generic_acl_operations->getacl() operation - */ -static struct posix_acl * -shmem_get_acl(struct inode *inode, int type) -{ - struct posix_acl *acl = NULL; - - spin_lock(&inode->i_lock); - switch(type) { - case ACL_TYPE_ACCESS: - acl = posix_acl_dup(inode->i_acl); - break; - - case ACL_TYPE_DEFAULT: - acl = posix_acl_dup(inode->i_default_acl); - break; - } - spin_unlock(&inode->i_lock); - - return acl; -} - -/** - * shmem_set_acl - generic_acl_operations->setacl() operation - */ -static void -shmem_set_acl(struct inode *inode, int type, struct posix_acl *acl) -{ - struct posix_acl *free = NULL; - - spin_lock(&inode->i_lock); - switch(type) { - case ACL_TYPE_ACCESS: - free = inode->i_acl; - inode->i_acl = posix_acl_dup(acl); - break; - - case ACL_TYPE_DEFAULT: - free = inode->i_default_acl; - inode->i_default_acl = posix_acl_dup(acl); - break; - } - spin_unlock(&inode->i_lock); - posix_acl_release(free); -} - -struct generic_acl_operations shmem_acl_ops = { - .getacl = shmem_get_acl, - .setacl = shmem_set_acl, -}; - -static size_t -shmem_xattr_list_acl(struct dentry *dentry, char *list, size_t list_size, - const char *name, size_t name_len, int type) -{ - return generic_acl_list(dentry->d_inode, &shmem_acl_ops, - type, list, list_size); -} - -static int -shmem_xattr_get_acl(struct dentry *dentry, const char *name, void *buffer, - size_t size, int type) -{ - if (strcmp(name, "") != 0) - return -EINVAL; - return generic_acl_get(dentry->d_inode, &shmem_acl_ops, type, - buffer, size); -} - -static int -shmem_xattr_set_acl(struct dentry *dentry, const char *name, const void *value, - size_t size, int flags, int type) -{ - if (strcmp(name, "") != 0) - return -EINVAL; - return generic_acl_set(dentry->d_inode, &shmem_acl_ops, type, - value, size); -} - -struct xattr_handler shmem_xattr_acl_access_handler = { - .prefix = POSIX_ACL_XATTR_ACCESS, - .flags = ACL_TYPE_ACCESS, - .list = shmem_xattr_list_acl, - .get = shmem_xattr_get_acl, - .set = shmem_xattr_set_acl, -}; - -struct xattr_handler shmem_xattr_acl_default_handler = { - .prefix = POSIX_ACL_XATTR_DEFAULT, - .flags = ACL_TYPE_DEFAULT, - .list = shmem_xattr_list_acl, - .get = shmem_xattr_get_acl, - .set = shmem_xattr_set_acl, -}; - -/** - * shmem_acl_init - Inizialize the acl(s) of a new inode - */ -int -shmem_acl_init(struct inode *inode, struct inode *dir) -{ - return generic_acl_init(inode, dir, &shmem_acl_ops); -} - -/** - * shmem_check_acl - check_acl() callback for generic_permission() - */ -int -shmem_check_acl(struct inode *inode, int mask) -{ - struct posix_acl *acl = shmem_get_acl(inode, ACL_TYPE_ACCESS); - - if (acl) { - int error = posix_acl_permission(inode, acl, mask); - posix_acl_release(acl); - return error; - } - return -EAGAIN; -} |