1 #include <linux/init.h> 2 #include <linux/posix_acl.h> 3 4 #define REISERFS_ACL_VERSION 0x0001 5 6 typedef struct { 7 __le16 e_tag; 8 __le16 e_perm; 9 __le32 e_id; 10 } reiserfs_acl_entry; 11 12 typedef struct { 13 __le16 e_tag; 14 __le16 e_perm; 15 } reiserfs_acl_entry_short; 16 17 typedef struct { 18 __le32 a_version; 19 } reiserfs_acl_header; 20 21 static inline size_t reiserfs_acl_size(int count) 22 { 23 if (count <= 4) { 24 return sizeof(reiserfs_acl_header) + 25 count * sizeof(reiserfs_acl_entry_short); 26 } else { 27 return sizeof(reiserfs_acl_header) + 28 4 * sizeof(reiserfs_acl_entry_short) + 29 (count - 4) * sizeof(reiserfs_acl_entry); 30 } 31 } 32 33 static inline int reiserfs_acl_count(size_t size) 34 { 35 ssize_t s; 36 size -= sizeof(reiserfs_acl_header); 37 s = size - 4 * sizeof(reiserfs_acl_entry_short); 38 if (s < 0) { 39 if (size % sizeof(reiserfs_acl_entry_short)) 40 return -1; 41 return size / sizeof(reiserfs_acl_entry_short); 42 } else { 43 if (s % sizeof(reiserfs_acl_entry)) 44 return -1; 45 return s / sizeof(reiserfs_acl_entry) + 4; 46 } 47 } 48 49 #ifdef CONFIG_REISERFS_FS_POSIX_ACL 50 struct posix_acl *reiserfs_get_acl(struct inode *inode, int type); 51 int reiserfs_acl_chmod(struct inode *inode); 52 int reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th, 53 struct inode *dir, struct dentry *dentry, 54 struct inode *inode); 55 int reiserfs_cache_default_acl(struct inode *dir); 56 extern const struct xattr_handler reiserfs_posix_acl_default_handler; 57 extern const struct xattr_handler reiserfs_posix_acl_access_handler; 58 59 #else 60 61 #define reiserfs_cache_default_acl(inode) 0 62 #define reiserfs_get_acl NULL 63 64 static inline int reiserfs_acl_chmod(struct inode *inode) 65 { 66 return 0; 67 } 68 69 static inline int 70 reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th, 71 const struct inode *dir, struct dentry *dentry, 72 struct inode *inode) 73 { 74 return 0; 75 } 76 #endif 77