/* File: fs/ext2/acl.h (C) 2001 Andreas Gruenbacher, <a.gruenbacher@computer.org> */ #include <linux/posix_acl_xattr.h> #define EXT2_ACL_VERSION 0x0001 typedef struct { __le16 e_tag; __le16 e_perm; __le32 e_id; } ext2_acl_entry; typedef struct { __le16 e_tag; __le16 e_perm; } ext2_acl_entry_short; typedef struct { __le32 a_version; } ext2_acl_header; static inline size_t ext2_acl_size(int count) { if (count <= 4) { return sizeof(ext2_acl_header) + count * sizeof(ext2_acl_entry_short); } else { return sizeof(ext2_acl_header) + 4 * sizeof(ext2_acl_entry_short) + (count - 4) * sizeof(ext2_acl_entry); } } static inline int ext2_acl_count(size_t size) { ssize_t s; size -= sizeof(ext2_acl_header); s = size - 4 * sizeof(ext2_acl_entry_short); if (s < 0) { if (size % sizeof(ext2_acl_entry_short)) return -1; return size / sizeof(ext2_acl_entry_short); } else { if (s % sizeof(ext2_acl_entry)) return -1; return s / sizeof(ext2_acl_entry) + 4; } } #ifdef CONFIG_EXT2_FS_POSIX_ACL /* Value for inode->u.ext2_i.i_acl and inode->u.ext2_i.i_default_acl if the ACL has not been cached */ #define EXT2_ACL_NOT_CACHED ((void *)-1) /* acl.c */ extern int ext2_permission (struct inode *, int, struct nameidata *); extern int ext2_acl_chmod (struct inode *); extern int ext2_init_acl (struct inode *, struct inode *); #else #include <linux/sched.h> #define ext2_permission NULL #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; } #endif