| 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 |