Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 1 | #ifndef __BTRFS__ |
| 2 | #define __BTRFS__ |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 3 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 4 | #include <linux/fs.h> |
Chris Mason | d602557 | 2007-03-30 14:27:56 -0400 | [diff] [blame] | 5 | #include <linux/buffer_head.h> |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 6 | #include <linux/kobject.h> |
Chris Mason | 8ef9762 | 2007-03-26 10:15:30 -0400 | [diff] [blame] | 7 | #include "bit-radix.h" |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 8 | |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 9 | struct btrfs_trans_handle; |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 10 | struct btrfs_transaction; |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 11 | extern struct kmem_cache *btrfs_path_cachep; |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 12 | |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 13 | #define BTRFS_MAGIC "_BtRfS_M" |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 14 | |
Chris Mason | 6407bf6 | 2007-03-27 06:33:00 -0400 | [diff] [blame] | 15 | #define BTRFS_ROOT_TREE_OBJECTID 1ULL |
| 16 | #define BTRFS_EXTENT_TREE_OBJECTID 2ULL |
Chris Mason | 1b05da2 | 2007-04-10 12:13:09 -0400 | [diff] [blame] | 17 | #define BTRFS_FS_TREE_OBJECTID 3ULL |
| 18 | #define BTRFS_FIRST_FREE_OBJECTID 4ULL |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 19 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 20 | /* |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 21 | * we can actually store much bigger names, but lets not confuse the rest |
| 22 | * of linux |
| 23 | */ |
| 24 | #define BTRFS_NAME_LEN 255 |
| 25 | |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 26 | /* 32 bytes in various csum fields */ |
| 27 | #define BTRFS_CSUM_SIZE 32 |
| 28 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 29 | /* |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 30 | * the key defines the order in the tree, and so it also defines (optimal) |
| 31 | * block layout. objectid corresonds to the inode number. The flags |
| 32 | * tells us things about the object, and is a kind of stream selector. |
| 33 | * so for a given inode, keys with flags of 1 might refer to the inode |
| 34 | * data, flags of 2 may point to file data in the btree and flags == 3 |
| 35 | * may point to extents. |
| 36 | * |
| 37 | * offset is the starting byte offset for this key in the stream. |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 38 | * |
| 39 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always |
| 40 | * in cpu native order. Otherwise they are identical and their sizes |
| 41 | * should be the same (ie both packed) |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 42 | */ |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 43 | struct btrfs_disk_key { |
| 44 | __le64 objectid; |
Chris Mason | a8a2ee0 | 2007-03-16 08:46:49 -0400 | [diff] [blame] | 45 | __le64 offset; |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 46 | __le32 flags; |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 47 | } __attribute__ ((__packed__)); |
| 48 | |
| 49 | struct btrfs_key { |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 50 | u64 objectid; |
Chris Mason | a8a2ee0 | 2007-03-16 08:46:49 -0400 | [diff] [blame] | 51 | u64 offset; |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 52 | u32 flags; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 53 | } __attribute__ ((__packed__)); |
| 54 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 55 | /* |
| 56 | * every tree block (leaf or node) starts with this header. |
| 57 | */ |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 58 | struct btrfs_header { |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 59 | u8 csum[BTRFS_CSUM_SIZE]; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 60 | u8 fsid[16]; /* FS specific uuid */ |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 61 | __le64 blocknr; /* which block this node is supposed to live in */ |
Chris Mason | 7f5c151 | 2007-03-23 15:56:19 -0400 | [diff] [blame] | 62 | __le64 generation; |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 63 | __le16 nritems; |
| 64 | __le16 flags; |
Chris Mason | 9a6f11e | 2007-03-27 09:06:38 -0400 | [diff] [blame] | 65 | u8 level; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 66 | } __attribute__ ((__packed__)); |
| 67 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 68 | #define BTRFS_MAX_LEVEL 8 |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 69 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->blocksize - \ |
| 70 | sizeof(struct btrfs_header)) / \ |
| 71 | (sizeof(struct btrfs_disk_key) + sizeof(u64))) |
| 72 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
| 73 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->blocksize)) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 74 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 75 | struct buffer_head; |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 76 | /* |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 77 | * the super block basically lists the main trees of the FS |
| 78 | * it currently lacks any block count etc etc |
| 79 | */ |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 80 | struct btrfs_super_block { |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 81 | u8 csum[BTRFS_CSUM_SIZE]; |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 82 | /* the first 3 fields must match struct btrfs_header */ |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 83 | u8 fsid[16]; /* FS specific uuid */ |
| 84 | __le64 blocknr; /* this block number */ |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 85 | __le64 magic; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 86 | __le32 blocksize; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 87 | __le64 generation; |
| 88 | __le64 root; |
| 89 | __le64 total_blocks; |
| 90 | __le64 blocks_used; |
Chris Mason | 2e635a2 | 2007-03-21 11:12:56 -0400 | [diff] [blame] | 91 | __le64 root_dir_objectid; |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 92 | } __attribute__ ((__packed__)); |
| 93 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 94 | /* |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 95 | * A leaf is full of items. offset and size tell us where to find |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 96 | * the item in the leaf (relative to the start of the data area) |
| 97 | */ |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 98 | struct btrfs_item { |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 99 | struct btrfs_disk_key key; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 100 | __le32 offset; |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 101 | __le16 size; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 102 | } __attribute__ ((__packed__)); |
| 103 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 104 | /* |
| 105 | * leaves have an item area and a data area: |
| 106 | * [item0, item1....itemN] [free space] [dataN...data1, data0] |
| 107 | * |
| 108 | * The data is separate from the items to get the keys closer together |
| 109 | * during searches. |
| 110 | */ |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 111 | struct btrfs_leaf { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 112 | struct btrfs_header header; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 113 | struct btrfs_item items[]; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 114 | } __attribute__ ((__packed__)); |
| 115 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 116 | /* |
| 117 | * all non-leaf blocks are nodes, they hold only keys and pointers to |
| 118 | * other blocks |
| 119 | */ |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 120 | struct btrfs_key_ptr { |
| 121 | struct btrfs_disk_key key; |
| 122 | __le64 blockptr; |
| 123 | } __attribute__ ((__packed__)); |
| 124 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 125 | struct btrfs_node { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 126 | struct btrfs_header header; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 127 | struct btrfs_key_ptr ptrs[]; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 128 | } __attribute__ ((__packed__)); |
| 129 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 130 | /* |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 131 | * btrfs_paths remember the path taken from the root down to the leaf. |
| 132 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 133 | * to any other levels that are present. |
| 134 | * |
| 135 | * The slots array records the index of the item or block pointer |
| 136 | * used while walking the tree. |
| 137 | */ |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 138 | struct btrfs_path { |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 139 | struct buffer_head *nodes[BTRFS_MAX_LEVEL]; |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 140 | int slots[BTRFS_MAX_LEVEL]; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 141 | }; |
Chris Mason | 5de08d7 | 2007-02-24 06:24:44 -0500 | [diff] [blame] | 142 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 143 | /* |
| 144 | * items in the extent btree are used to record the objectid of the |
| 145 | * owner of the block and the number of references |
| 146 | */ |
| 147 | struct btrfs_extent_item { |
| 148 | __le32 refs; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 149 | } __attribute__ ((__packed__)); |
| 150 | |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 151 | struct btrfs_inode_timespec { |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 152 | __le64 sec; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 153 | __le32 nsec; |
| 154 | } __attribute__ ((__packed__)); |
| 155 | |
| 156 | /* |
| 157 | * there is no padding here on purpose. If you want to extent the inode, |
| 158 | * make a new item type |
| 159 | */ |
| 160 | struct btrfs_inode_item { |
| 161 | __le64 generation; |
| 162 | __le64 size; |
| 163 | __le64 nblocks; |
| 164 | __le32 nlink; |
| 165 | __le32 uid; |
| 166 | __le32 gid; |
| 167 | __le32 mode; |
| 168 | __le32 rdev; |
| 169 | __le16 flags; |
| 170 | __le16 compat_flags; |
| 171 | struct btrfs_inode_timespec atime; |
| 172 | struct btrfs_inode_timespec ctime; |
| 173 | struct btrfs_inode_timespec mtime; |
| 174 | struct btrfs_inode_timespec otime; |
| 175 | } __attribute__ ((__packed__)); |
| 176 | |
| 177 | /* inline data is just a blob of bytes */ |
| 178 | struct btrfs_inline_data_item { |
| 179 | u8 data; |
| 180 | } __attribute__ ((__packed__)); |
| 181 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 182 | struct btrfs_dir_item { |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 183 | struct btrfs_disk_key location; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 184 | __le16 flags; |
Chris Mason | a8a2ee0 | 2007-03-16 08:46:49 -0400 | [diff] [blame] | 185 | __le16 name_len; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 186 | u8 type; |
| 187 | } __attribute__ ((__packed__)); |
| 188 | |
| 189 | struct btrfs_root_item { |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 190 | struct btrfs_inode_item inode; |
| 191 | __le64 root_dirid; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 192 | __le64 blocknr; |
| 193 | __le32 flags; |
| 194 | __le64 block_limit; |
| 195 | __le64 blocks_used; |
| 196 | __le32 refs; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 197 | } __attribute__ ((__packed__)); |
| 198 | |
| 199 | struct btrfs_file_extent_item { |
Chris Mason | 71951f3 | 2007-03-27 09:16:29 -0400 | [diff] [blame] | 200 | __le64 generation; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 201 | /* |
| 202 | * disk space consumed by the extent, checksum blocks are included |
| 203 | * in these numbers |
| 204 | */ |
| 205 | __le64 disk_blocknr; |
| 206 | __le64 disk_num_blocks; |
| 207 | /* |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 208 | * the logical offset in file blocks (no csums) |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 209 | * this extent record is for. This allows a file extent to point |
| 210 | * into the middle of an existing extent on disk, sharing it |
| 211 | * between two snapshots (useful if some bytes in the middle of the |
| 212 | * extent have changed |
| 213 | */ |
| 214 | __le64 offset; |
| 215 | /* |
| 216 | * the logical number of file blocks (no csums included) |
| 217 | */ |
| 218 | __le64 num_blocks; |
| 219 | } __attribute__ ((__packed__)); |
| 220 | |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 221 | struct btrfs_csum_item { |
| 222 | u8 csum[BTRFS_CSUM_SIZE]; |
| 223 | } __attribute__ ((__packed__)); |
| 224 | |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 225 | struct crypto_hash; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 226 | struct btrfs_fs_info { |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 227 | struct btrfs_root *extent_root; |
| 228 | struct btrfs_root *tree_root; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 229 | struct btrfs_key current_insert; |
| 230 | struct btrfs_key last_insert; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 231 | struct radix_tree_root fs_roots_radix; |
Chris Mason | 8ef9762 | 2007-03-26 10:15:30 -0400 | [diff] [blame] | 232 | struct radix_tree_root pending_del_radix; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 233 | struct radix_tree_root pinned_radix; |
Chris Mason | 293ffd5 | 2007-03-20 15:57:25 -0400 | [diff] [blame] | 234 | u64 generation; |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 235 | struct btrfs_transaction *running_transaction; |
Chris Mason | 1261ec4 | 2007-03-20 20:35:03 -0400 | [diff] [blame] | 236 | struct btrfs_super_block *disk_super; |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 237 | struct buffer_head *sb_buffer; |
| 238 | struct super_block *sb; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 239 | struct inode *btree_inode; |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 240 | struct mutex trans_mutex; |
Chris Mason | d561c02 | 2007-03-23 19:47:49 -0400 | [diff] [blame] | 241 | struct mutex fs_mutex; |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 242 | struct crypto_hash *hash_tfm; |
| 243 | spinlock_t hash_lock; |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 244 | struct kobject kobj; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 245 | }; |
| 246 | |
| 247 | /* |
| 248 | * in ram representation of the tree. extent_root is used for all allocations |
| 249 | * and for the extent tree extent_root root. current_insert is used |
| 250 | * only for the extent tree. |
| 251 | */ |
| 252 | struct btrfs_root { |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 253 | struct buffer_head *node; |
| 254 | struct buffer_head *commit_root; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 255 | struct btrfs_root_item root_item; |
| 256 | struct btrfs_key root_key; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 257 | struct btrfs_fs_info *fs_info; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 258 | struct inode *inode; |
| 259 | u64 objectid; |
| 260 | u64 last_trans; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 261 | u32 blocksize; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 262 | int ref_cows; |
| 263 | u32 type; |
Chris Mason | 1b05da2 | 2007-04-10 12:13:09 -0400 | [diff] [blame] | 264 | u64 highest_inode; |
| 265 | u64 last_inode_alloc; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 266 | }; |
| 267 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 268 | /* the lower bits in the key flags defines the item type */ |
| 269 | #define BTRFS_KEY_TYPE_MAX 256 |
| 270 | #define BTRFS_KEY_TYPE_MASK (BTRFS_KEY_TYPE_MAX - 1) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 271 | |
Chris Mason | 7fcde0e | 2007-04-05 12:13:21 -0400 | [diff] [blame] | 272 | #define BTRFS_KEY_OVERFLOW_MAX 128 |
| 273 | #define BTRFS_KEY_OVERFLOW_SHIFT 8 |
| 274 | #define BTRFS_KEY_OVERFLOW_MASK (0x7FULL << BTRFS_KEY_OVERFLOW_SHIFT) |
| 275 | |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 276 | /* |
| 277 | * inode items have the data typically returned from stat and store other |
| 278 | * info about object characteristics. There is one for every file and dir in |
| 279 | * the FS |
| 280 | */ |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 281 | #define BTRFS_INODE_ITEM_KEY 1 |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 282 | |
| 283 | /* |
| 284 | * dir items are the name -> inode pointers in a directory. There is one |
| 285 | * for every name in a directory. |
| 286 | */ |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 287 | #define BTRFS_DIR_ITEM_KEY 2 |
Chris Mason | bae45de | 2007-04-04 21:22:22 -0400 | [diff] [blame] | 288 | #define BTRFS_DIR_INDEX_KEY 3 |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 289 | /* |
| 290 | * inline data is file data that fits in the btree. |
| 291 | */ |
Chris Mason | bae45de | 2007-04-04 21:22:22 -0400 | [diff] [blame] | 292 | #define BTRFS_INLINE_DATA_KEY 4 |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 293 | /* |
| 294 | * extent data is for data that can't fit in the btree. It points to |
| 295 | * a (hopefully) huge chunk of disk |
| 296 | */ |
Chris Mason | bae45de | 2007-04-04 21:22:22 -0400 | [diff] [blame] | 297 | #define BTRFS_EXTENT_DATA_KEY 5 |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 298 | /* |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 299 | * csum items have the checksums for data in the extents |
| 300 | */ |
Chris Mason | bae45de | 2007-04-04 21:22:22 -0400 | [diff] [blame] | 301 | #define BTRFS_CSUM_ITEM_KEY 6 |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 302 | |
| 303 | /* |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 304 | * root items point to tree roots. There are typically in the root |
| 305 | * tree used by the super block to find all the other trees |
| 306 | */ |
Chris Mason | bae45de | 2007-04-04 21:22:22 -0400 | [diff] [blame] | 307 | #define BTRFS_ROOT_ITEM_KEY 7 |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 308 | /* |
| 309 | * extent items are in the extent map tree. These record which blocks |
| 310 | * are used, and how many references there are to each block |
| 311 | */ |
Chris Mason | bae45de | 2007-04-04 21:22:22 -0400 | [diff] [blame] | 312 | #define BTRFS_EXTENT_ITEM_KEY 8 |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 313 | |
| 314 | /* |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 315 | * string items are for debugging. They just store a short string of |
| 316 | * data in the FS |
| 317 | */ |
Chris Mason | 1b05da2 | 2007-04-10 12:13:09 -0400 | [diff] [blame] | 318 | #define BTRFS_STRING_ITEM_KEY 9 |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 319 | |
| 320 | static inline u64 btrfs_inode_generation(struct btrfs_inode_item *i) |
| 321 | { |
| 322 | return le64_to_cpu(i->generation); |
| 323 | } |
| 324 | |
| 325 | static inline void btrfs_set_inode_generation(struct btrfs_inode_item *i, |
| 326 | u64 val) |
| 327 | { |
| 328 | i->generation = cpu_to_le64(val); |
| 329 | } |
| 330 | |
| 331 | static inline u64 btrfs_inode_size(struct btrfs_inode_item *i) |
| 332 | { |
| 333 | return le64_to_cpu(i->size); |
| 334 | } |
| 335 | |
| 336 | static inline void btrfs_set_inode_size(struct btrfs_inode_item *i, u64 val) |
| 337 | { |
| 338 | i->size = cpu_to_le64(val); |
| 339 | } |
| 340 | |
| 341 | static inline u64 btrfs_inode_nblocks(struct btrfs_inode_item *i) |
| 342 | { |
| 343 | return le64_to_cpu(i->nblocks); |
| 344 | } |
| 345 | |
| 346 | static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item *i, u64 val) |
| 347 | { |
| 348 | i->nblocks = cpu_to_le64(val); |
| 349 | } |
| 350 | |
| 351 | static inline u32 btrfs_inode_nlink(struct btrfs_inode_item *i) |
| 352 | { |
| 353 | return le32_to_cpu(i->nlink); |
| 354 | } |
| 355 | |
| 356 | static inline void btrfs_set_inode_nlink(struct btrfs_inode_item *i, u32 val) |
| 357 | { |
| 358 | i->nlink = cpu_to_le32(val); |
| 359 | } |
| 360 | |
| 361 | static inline u32 btrfs_inode_uid(struct btrfs_inode_item *i) |
| 362 | { |
| 363 | return le32_to_cpu(i->uid); |
| 364 | } |
| 365 | |
| 366 | static inline void btrfs_set_inode_uid(struct btrfs_inode_item *i, u32 val) |
| 367 | { |
| 368 | i->uid = cpu_to_le32(val); |
| 369 | } |
| 370 | |
| 371 | static inline u32 btrfs_inode_gid(struct btrfs_inode_item *i) |
| 372 | { |
| 373 | return le32_to_cpu(i->gid); |
| 374 | } |
| 375 | |
| 376 | static inline void btrfs_set_inode_gid(struct btrfs_inode_item *i, u32 val) |
| 377 | { |
| 378 | i->gid = cpu_to_le32(val); |
| 379 | } |
| 380 | |
| 381 | static inline u32 btrfs_inode_mode(struct btrfs_inode_item *i) |
| 382 | { |
| 383 | return le32_to_cpu(i->mode); |
| 384 | } |
| 385 | |
| 386 | static inline void btrfs_set_inode_mode(struct btrfs_inode_item *i, u32 val) |
| 387 | { |
| 388 | i->mode = cpu_to_le32(val); |
| 389 | } |
| 390 | |
| 391 | static inline u32 btrfs_inode_rdev(struct btrfs_inode_item *i) |
| 392 | { |
| 393 | return le32_to_cpu(i->rdev); |
| 394 | } |
| 395 | |
| 396 | static inline void btrfs_set_inode_rdev(struct btrfs_inode_item *i, u32 val) |
| 397 | { |
| 398 | i->rdev = cpu_to_le32(val); |
| 399 | } |
| 400 | |
| 401 | static inline u16 btrfs_inode_flags(struct btrfs_inode_item *i) |
| 402 | { |
| 403 | return le16_to_cpu(i->flags); |
| 404 | } |
| 405 | |
| 406 | static inline void btrfs_set_inode_flags(struct btrfs_inode_item *i, u16 val) |
| 407 | { |
| 408 | i->flags = cpu_to_le16(val); |
| 409 | } |
| 410 | |
| 411 | static inline u16 btrfs_inode_compat_flags(struct btrfs_inode_item *i) |
| 412 | { |
| 413 | return le16_to_cpu(i->compat_flags); |
| 414 | } |
| 415 | |
| 416 | static inline void btrfs_set_inode_compat_flags(struct btrfs_inode_item *i, |
| 417 | u16 val) |
| 418 | { |
| 419 | i->compat_flags = cpu_to_le16(val); |
| 420 | } |
| 421 | |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 422 | static inline u64 btrfs_timespec_sec(struct btrfs_inode_timespec *ts) |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 423 | { |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 424 | return le64_to_cpu(ts->sec); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 425 | } |
| 426 | |
| 427 | static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec *ts, |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 428 | u64 val) |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 429 | { |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 430 | ts->sec = cpu_to_le64(val); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 431 | } |
| 432 | |
| 433 | static inline u32 btrfs_timespec_nsec(struct btrfs_inode_timespec *ts) |
| 434 | { |
| 435 | return le32_to_cpu(ts->nsec); |
| 436 | } |
| 437 | |
| 438 | static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec *ts, |
| 439 | u32 val) |
| 440 | { |
| 441 | ts->nsec = cpu_to_le32(val); |
| 442 | } |
| 443 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 444 | static inline u32 btrfs_extent_refs(struct btrfs_extent_item *ei) |
Chris Mason | cf27e1e | 2007-03-13 09:49:06 -0400 | [diff] [blame] | 445 | { |
| 446 | return le32_to_cpu(ei->refs); |
| 447 | } |
| 448 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 449 | static inline void btrfs_set_extent_refs(struct btrfs_extent_item *ei, u32 val) |
Chris Mason | cf27e1e | 2007-03-13 09:49:06 -0400 | [diff] [blame] | 450 | { |
| 451 | ei->refs = cpu_to_le32(val); |
| 452 | } |
| 453 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 454 | static inline u64 btrfs_node_blockptr(struct btrfs_node *n, int nr) |
Chris Mason | 1d4f8a0 | 2007-03-13 09:28:32 -0400 | [diff] [blame] | 455 | { |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 456 | return le64_to_cpu(n->ptrs[nr].blockptr); |
Chris Mason | 1d4f8a0 | 2007-03-13 09:28:32 -0400 | [diff] [blame] | 457 | } |
| 458 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 459 | static inline void btrfs_set_node_blockptr(struct btrfs_node *n, int nr, |
| 460 | u64 val) |
Chris Mason | 1d4f8a0 | 2007-03-13 09:28:32 -0400 | [diff] [blame] | 461 | { |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 462 | n->ptrs[nr].blockptr = cpu_to_le64(val); |
Chris Mason | 1d4f8a0 | 2007-03-13 09:28:32 -0400 | [diff] [blame] | 463 | } |
| 464 | |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 465 | static inline u32 btrfs_item_offset(struct btrfs_item *item) |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 466 | { |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 467 | return le32_to_cpu(item->offset); |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 468 | } |
| 469 | |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 470 | static inline void btrfs_set_item_offset(struct btrfs_item *item, u32 val) |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 471 | { |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 472 | item->offset = cpu_to_le32(val); |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 473 | } |
| 474 | |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 475 | static inline u32 btrfs_item_end(struct btrfs_item *item) |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 476 | { |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 477 | return le32_to_cpu(item->offset) + le16_to_cpu(item->size); |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 478 | } |
| 479 | |
| 480 | static inline u16 btrfs_item_size(struct btrfs_item *item) |
| 481 | { |
| 482 | return le16_to_cpu(item->size); |
| 483 | } |
| 484 | |
| 485 | static inline void btrfs_set_item_size(struct btrfs_item *item, u16 val) |
| 486 | { |
| 487 | item->size = cpu_to_le16(val); |
| 488 | } |
| 489 | |
Chris Mason | 1d4f640 | 2007-03-15 15:18:43 -0400 | [diff] [blame] | 490 | static inline u16 btrfs_dir_flags(struct btrfs_dir_item *d) |
| 491 | { |
| 492 | return le16_to_cpu(d->flags); |
| 493 | } |
| 494 | |
| 495 | static inline void btrfs_set_dir_flags(struct btrfs_dir_item *d, u16 val) |
| 496 | { |
| 497 | d->flags = cpu_to_le16(val); |
| 498 | } |
| 499 | |
| 500 | static inline u8 btrfs_dir_type(struct btrfs_dir_item *d) |
| 501 | { |
| 502 | return d->type; |
| 503 | } |
| 504 | |
| 505 | static inline void btrfs_set_dir_type(struct btrfs_dir_item *d, u8 val) |
| 506 | { |
| 507 | d->type = val; |
| 508 | } |
| 509 | |
Chris Mason | a8a2ee0 | 2007-03-16 08:46:49 -0400 | [diff] [blame] | 510 | static inline u16 btrfs_dir_name_len(struct btrfs_dir_item *d) |
Chris Mason | 1d4f640 | 2007-03-15 15:18:43 -0400 | [diff] [blame] | 511 | { |
Chris Mason | a8a2ee0 | 2007-03-16 08:46:49 -0400 | [diff] [blame] | 512 | return le16_to_cpu(d->name_len); |
| 513 | } |
| 514 | |
| 515 | static inline void btrfs_set_dir_name_len(struct btrfs_dir_item *d, u16 val) |
| 516 | { |
| 517 | d->name_len = cpu_to_le16(val); |
Chris Mason | 1d4f640 | 2007-03-15 15:18:43 -0400 | [diff] [blame] | 518 | } |
| 519 | |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 520 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
| 521 | struct btrfs_disk_key *disk) |
| 522 | { |
| 523 | cpu->offset = le64_to_cpu(disk->offset); |
| 524 | cpu->flags = le32_to_cpu(disk->flags); |
| 525 | cpu->objectid = le64_to_cpu(disk->objectid); |
| 526 | } |
| 527 | |
| 528 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, |
| 529 | struct btrfs_key *cpu) |
| 530 | { |
| 531 | disk->offset = cpu_to_le64(cpu->offset); |
| 532 | disk->flags = cpu_to_le32(cpu->flags); |
| 533 | disk->objectid = cpu_to_le64(cpu->objectid); |
| 534 | } |
| 535 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 536 | static inline u64 btrfs_disk_key_objectid(struct btrfs_disk_key *disk) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 537 | { |
| 538 | return le64_to_cpu(disk->objectid); |
| 539 | } |
| 540 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 541 | static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key *disk, |
| 542 | u64 val) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 543 | { |
| 544 | disk->objectid = cpu_to_le64(val); |
| 545 | } |
| 546 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 547 | static inline u64 btrfs_disk_key_offset(struct btrfs_disk_key *disk) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 548 | { |
| 549 | return le64_to_cpu(disk->offset); |
| 550 | } |
| 551 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 552 | static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key *disk, |
| 553 | u64 val) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 554 | { |
| 555 | disk->offset = cpu_to_le64(val); |
| 556 | } |
| 557 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 558 | static inline u32 btrfs_disk_key_flags(struct btrfs_disk_key *disk) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 559 | { |
| 560 | return le32_to_cpu(disk->flags); |
| 561 | } |
| 562 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 563 | static inline void btrfs_set_disk_key_flags(struct btrfs_disk_key *disk, |
| 564 | u32 val) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 565 | { |
| 566 | disk->flags = cpu_to_le32(val); |
| 567 | } |
| 568 | |
Chris Mason | 7fcde0e | 2007-04-05 12:13:21 -0400 | [diff] [blame] | 569 | static inline u32 btrfs_key_overflow(struct btrfs_key *key) |
| 570 | { |
| 571 | u32 over = key->flags & BTRFS_KEY_OVERFLOW_MASK; |
| 572 | return over >> BTRFS_KEY_OVERFLOW_SHIFT; |
| 573 | } |
| 574 | |
| 575 | static inline void btrfs_set_key_overflow(struct btrfs_key *key, u32 over) |
| 576 | { |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 577 | BUG_ON(over >= BTRFS_KEY_OVERFLOW_MAX); |
Chris Mason | 7fcde0e | 2007-04-05 12:13:21 -0400 | [diff] [blame] | 578 | over = over << BTRFS_KEY_OVERFLOW_SHIFT; |
| 579 | key->flags = (key->flags & ~((u64)BTRFS_KEY_OVERFLOW_MASK)) | over; |
| 580 | } |
| 581 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 582 | static inline u32 btrfs_key_type(struct btrfs_key *key) |
| 583 | { |
| 584 | return key->flags & BTRFS_KEY_TYPE_MASK; |
| 585 | } |
| 586 | |
| 587 | static inline u32 btrfs_disk_key_type(struct btrfs_disk_key *key) |
| 588 | { |
| 589 | return le32_to_cpu(key->flags) & BTRFS_KEY_TYPE_MASK; |
| 590 | } |
| 591 | |
| 592 | static inline void btrfs_set_key_type(struct btrfs_key *key, u32 type) |
| 593 | { |
| 594 | BUG_ON(type >= BTRFS_KEY_TYPE_MAX); |
| 595 | key->flags = (key->flags & ~((u64)BTRFS_KEY_TYPE_MASK)) | type; |
| 596 | } |
| 597 | |
| 598 | static inline void btrfs_set_disk_key_type(struct btrfs_disk_key *key, u32 type) |
| 599 | { |
| 600 | u32 flags = btrfs_disk_key_flags(key); |
| 601 | BUG_ON(type >= BTRFS_KEY_TYPE_MAX); |
| 602 | flags = (flags & ~((u64)BTRFS_KEY_TYPE_MASK)) | type; |
| 603 | btrfs_set_disk_key_flags(key, flags); |
| 604 | } |
| 605 | |
Chris Mason | 7fcde0e | 2007-04-05 12:13:21 -0400 | [diff] [blame] | 606 | static inline u32 btrfs_disk_key_overflow(struct btrfs_disk_key *key) |
| 607 | { |
| 608 | u32 over = le32_to_cpu(key->flags) & BTRFS_KEY_OVERFLOW_MASK; |
| 609 | return over >> BTRFS_KEY_OVERFLOW_SHIFT; |
| 610 | } |
| 611 | |
| 612 | static inline void btrfs_set_disK_key_overflow(struct btrfs_disk_key *key, |
| 613 | u32 over) |
| 614 | { |
| 615 | u32 flags = btrfs_disk_key_flags(key); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 616 | BUG_ON(over >= BTRFS_KEY_OVERFLOW_MAX); |
Chris Mason | 7fcde0e | 2007-04-05 12:13:21 -0400 | [diff] [blame] | 617 | over = over << BTRFS_KEY_OVERFLOW_SHIFT; |
| 618 | flags = (flags & ~((u64)BTRFS_KEY_OVERFLOW_MASK)) | over; |
| 619 | btrfs_set_disk_key_flags(key, flags); |
| 620 | } |
| 621 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 622 | static inline u64 btrfs_header_blocknr(struct btrfs_header *h) |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 623 | { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 624 | return le64_to_cpu(h->blocknr); |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 625 | } |
| 626 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 627 | static inline void btrfs_set_header_blocknr(struct btrfs_header *h, u64 blocknr) |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 628 | { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 629 | h->blocknr = cpu_to_le64(blocknr); |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 630 | } |
| 631 | |
Chris Mason | 7f5c151 | 2007-03-23 15:56:19 -0400 | [diff] [blame] | 632 | static inline u64 btrfs_header_generation(struct btrfs_header *h) |
| 633 | { |
| 634 | return le64_to_cpu(h->generation); |
| 635 | } |
| 636 | |
| 637 | static inline void btrfs_set_header_generation(struct btrfs_header *h, |
| 638 | u64 val) |
| 639 | { |
| 640 | h->generation = cpu_to_le64(val); |
| 641 | } |
| 642 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 643 | static inline u16 btrfs_header_nritems(struct btrfs_header *h) |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 644 | { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 645 | return le16_to_cpu(h->nritems); |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 646 | } |
| 647 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 648 | static inline void btrfs_set_header_nritems(struct btrfs_header *h, u16 val) |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 649 | { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 650 | h->nritems = cpu_to_le16(val); |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 651 | } |
| 652 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 653 | static inline u16 btrfs_header_flags(struct btrfs_header *h) |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 654 | { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 655 | return le16_to_cpu(h->flags); |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 656 | } |
| 657 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 658 | static inline void btrfs_set_header_flags(struct btrfs_header *h, u16 val) |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 659 | { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 660 | h->flags = cpu_to_le16(val); |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 661 | } |
| 662 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 663 | static inline int btrfs_header_level(struct btrfs_header *h) |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 664 | { |
Chris Mason | 9a6f11e | 2007-03-27 09:06:38 -0400 | [diff] [blame] | 665 | return h->level; |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 666 | } |
| 667 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 668 | static inline void btrfs_set_header_level(struct btrfs_header *h, int level) |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 669 | { |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 670 | BUG_ON(level > BTRFS_MAX_LEVEL); |
Chris Mason | 9a6f11e | 2007-03-27 09:06:38 -0400 | [diff] [blame] | 671 | h->level = level; |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 672 | } |
| 673 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 674 | static inline int btrfs_is_leaf(struct btrfs_node *n) |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 675 | { |
| 676 | return (btrfs_header_level(&n->header) == 0); |
| 677 | } |
| 678 | |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 679 | static inline u64 btrfs_root_blocknr(struct btrfs_root_item *item) |
| 680 | { |
| 681 | return le64_to_cpu(item->blocknr); |
| 682 | } |
| 683 | |
| 684 | static inline void btrfs_set_root_blocknr(struct btrfs_root_item *item, u64 val) |
| 685 | { |
| 686 | item->blocknr = cpu_to_le64(val); |
| 687 | } |
| 688 | |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 689 | static inline u64 btrfs_root_dirid(struct btrfs_root_item *item) |
| 690 | { |
| 691 | return le64_to_cpu(item->root_dirid); |
| 692 | } |
| 693 | |
| 694 | static inline void btrfs_set_root_dirid(struct btrfs_root_item *item, u64 val) |
| 695 | { |
| 696 | item->root_dirid = cpu_to_le64(val); |
| 697 | } |
| 698 | |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 699 | static inline u32 btrfs_root_refs(struct btrfs_root_item *item) |
| 700 | { |
| 701 | return le32_to_cpu(item->refs); |
| 702 | } |
| 703 | |
| 704 | static inline void btrfs_set_root_refs(struct btrfs_root_item *item, u32 val) |
| 705 | { |
| 706 | item->refs = cpu_to_le32(val); |
| 707 | } |
| 708 | |
| 709 | static inline u64 btrfs_super_blocknr(struct btrfs_super_block *s) |
| 710 | { |
| 711 | return le64_to_cpu(s->blocknr); |
| 712 | } |
| 713 | |
| 714 | static inline void btrfs_set_super_blocknr(struct btrfs_super_block *s, u64 val) |
| 715 | { |
| 716 | s->blocknr = cpu_to_le64(val); |
| 717 | } |
| 718 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 719 | static inline u64 btrfs_super_generation(struct btrfs_super_block *s) |
| 720 | { |
| 721 | return le64_to_cpu(s->generation); |
| 722 | } |
| 723 | |
| 724 | static inline void btrfs_set_super_generation(struct btrfs_super_block *s, |
| 725 | u64 val) |
| 726 | { |
| 727 | s->generation = cpu_to_le64(val); |
| 728 | } |
| 729 | |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 730 | static inline u64 btrfs_super_root(struct btrfs_super_block *s) |
| 731 | { |
| 732 | return le64_to_cpu(s->root); |
| 733 | } |
| 734 | |
| 735 | static inline void btrfs_set_super_root(struct btrfs_super_block *s, u64 val) |
| 736 | { |
| 737 | s->root = cpu_to_le64(val); |
| 738 | } |
| 739 | |
| 740 | static inline u64 btrfs_super_total_blocks(struct btrfs_super_block *s) |
| 741 | { |
| 742 | return le64_to_cpu(s->total_blocks); |
| 743 | } |
| 744 | |
| 745 | static inline void btrfs_set_super_total_blocks(struct btrfs_super_block *s, |
| 746 | u64 val) |
| 747 | { |
| 748 | s->total_blocks = cpu_to_le64(val); |
| 749 | } |
| 750 | |
| 751 | static inline u64 btrfs_super_blocks_used(struct btrfs_super_block *s) |
| 752 | { |
| 753 | return le64_to_cpu(s->blocks_used); |
| 754 | } |
| 755 | |
| 756 | static inline void btrfs_set_super_blocks_used(struct btrfs_super_block *s, |
| 757 | u64 val) |
| 758 | { |
| 759 | s->blocks_used = cpu_to_le64(val); |
| 760 | } |
| 761 | |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 762 | static inline u32 btrfs_super_blocksize(struct btrfs_super_block *s) |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 763 | { |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 764 | return le32_to_cpu(s->blocksize); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 765 | } |
| 766 | |
| 767 | static inline void btrfs_set_super_blocksize(struct btrfs_super_block *s, |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 768 | u32 val) |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 769 | { |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 770 | s->blocksize = cpu_to_le32(val); |
| 771 | } |
| 772 | |
Chris Mason | 2e635a2 | 2007-03-21 11:12:56 -0400 | [diff] [blame] | 773 | static inline u64 btrfs_super_root_dir(struct btrfs_super_block *s) |
| 774 | { |
| 775 | return le64_to_cpu(s->root_dir_objectid); |
| 776 | } |
| 777 | |
| 778 | static inline void btrfs_set_super_root_dir(struct btrfs_super_block *s, u64 |
| 779 | val) |
| 780 | { |
| 781 | s->root_dir_objectid = cpu_to_le64(val); |
| 782 | } |
| 783 | |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 784 | static inline u8 *btrfs_leaf_data(struct btrfs_leaf *l) |
| 785 | { |
| 786 | return (u8 *)l->items; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 787 | } |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 788 | |
| 789 | static inline u64 btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item |
| 790 | *e) |
| 791 | { |
| 792 | return le64_to_cpu(e->disk_blocknr); |
| 793 | } |
| 794 | |
| 795 | static inline void btrfs_set_file_extent_disk_blocknr(struct |
| 796 | btrfs_file_extent_item |
| 797 | *e, u64 val) |
| 798 | { |
| 799 | e->disk_blocknr = cpu_to_le64(val); |
| 800 | } |
| 801 | |
Chris Mason | 71951f3 | 2007-03-27 09:16:29 -0400 | [diff] [blame] | 802 | static inline u64 btrfs_file_extent_generation(struct btrfs_file_extent_item *e) |
| 803 | { |
| 804 | return le64_to_cpu(e->generation); |
| 805 | } |
| 806 | |
| 807 | static inline void btrfs_set_file_extent_generation(struct |
| 808 | btrfs_file_extent_item *e, |
| 809 | u64 val) |
| 810 | { |
| 811 | e->generation = cpu_to_le64(val); |
| 812 | } |
| 813 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 814 | static inline u64 btrfs_file_extent_disk_num_blocks(struct |
| 815 | btrfs_file_extent_item *e) |
| 816 | { |
| 817 | return le64_to_cpu(e->disk_num_blocks); |
| 818 | } |
| 819 | |
| 820 | static inline void btrfs_set_file_extent_disk_num_blocks(struct |
| 821 | btrfs_file_extent_item |
| 822 | *e, u64 val) |
| 823 | { |
| 824 | e->disk_num_blocks = cpu_to_le64(val); |
| 825 | } |
| 826 | |
| 827 | static inline u64 btrfs_file_extent_offset(struct btrfs_file_extent_item *e) |
| 828 | { |
| 829 | return le64_to_cpu(e->offset); |
| 830 | } |
| 831 | |
| 832 | static inline void btrfs_set_file_extent_offset(struct btrfs_file_extent_item |
| 833 | *e, u64 val) |
| 834 | { |
| 835 | e->offset = cpu_to_le64(val); |
| 836 | } |
| 837 | |
| 838 | static inline u64 btrfs_file_extent_num_blocks(struct btrfs_file_extent_item |
| 839 | *e) |
| 840 | { |
| 841 | return le64_to_cpu(e->num_blocks); |
| 842 | } |
| 843 | |
| 844 | static inline void btrfs_set_file_extent_num_blocks(struct |
| 845 | btrfs_file_extent_item *e, |
| 846 | u64 val) |
| 847 | { |
| 848 | e->num_blocks = cpu_to_le64(val); |
| 849 | } |
| 850 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 851 | static inline struct btrfs_root *btrfs_sb(struct super_block *sb) |
| 852 | { |
| 853 | return sb->s_fs_info; |
| 854 | } |
| 855 | |
Chris Mason | d602557 | 2007-03-30 14:27:56 -0400 | [diff] [blame] | 856 | static inline void btrfs_check_bounds(void *vptr, size_t len, |
| 857 | void *vcontainer, size_t container_len) |
| 858 | { |
| 859 | char *ptr = vptr; |
| 860 | char *container = vcontainer; |
| 861 | WARN_ON(ptr < container); |
| 862 | WARN_ON(ptr + len > container + container_len); |
| 863 | } |
| 864 | |
| 865 | static inline void btrfs_memcpy(struct btrfs_root *root, |
| 866 | void *dst_block, |
| 867 | void *dst, const void *src, size_t nr) |
| 868 | { |
| 869 | btrfs_check_bounds(dst, nr, dst_block, root->fs_info->sb->s_blocksize); |
| 870 | memcpy(dst, src, nr); |
| 871 | } |
| 872 | |
| 873 | static inline void btrfs_memmove(struct btrfs_root *root, |
| 874 | void *dst_block, |
| 875 | void *dst, void *src, size_t nr) |
| 876 | { |
| 877 | btrfs_check_bounds(dst, nr, dst_block, root->fs_info->sb->s_blocksize); |
| 878 | memmove(dst, src, nr); |
| 879 | } |
| 880 | |
| 881 | static inline void btrfs_mark_buffer_dirty(struct buffer_head *bh) |
| 882 | { |
| 883 | WARN_ON(!atomic_read(&bh->b_count)); |
| 884 | mark_buffer_dirty(bh); |
| 885 | } |
| 886 | |
Chris Mason | 4beb1b8 | 2007-03-14 10:31:29 -0400 | [diff] [blame] | 887 | /* helper function to cast into the data area of the leaf. */ |
| 888 | #define btrfs_item_ptr(leaf, slot, type) \ |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 889 | ((type *)(btrfs_leaf_data(leaf) + \ |
| 890 | btrfs_item_offset((leaf)->items + (slot)))) |
Chris Mason | 4beb1b8 | 2007-03-14 10:31:29 -0400 | [diff] [blame] | 891 | |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 892 | /* extent-item.c */ |
Chris Mason | c5739bb | 2007-04-10 09:27:04 -0400 | [diff] [blame] | 893 | int btrfs_inc_root_ref(struct btrfs_trans_handle *trans, |
| 894 | struct btrfs_root *root); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 895 | struct buffer_head *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 896 | struct btrfs_root *root); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 897 | int btrfs_alloc_extent(struct btrfs_trans_handle *trans, struct btrfs_root |
| 898 | *root, u64 num_blocks, u64 search_start, u64 |
Chris Mason | d0dbc62 | 2007-04-10 12:36:36 -0400 | [diff] [blame^] | 899 | search_end, struct btrfs_key *ins); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 900 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 901 | struct buffer_head *buf); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 902 | int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root |
| 903 | *root, u64 blocknr, u64 num_blocks, int pin); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 904 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, struct |
| 905 | btrfs_root *root); |
| 906 | /* ctree.c */ |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 907 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
| 908 | *root, struct btrfs_key *key, struct btrfs_path *p, int |
| 909 | ins_len, int cow); |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 910 | void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 911 | struct btrfs_path *btrfs_alloc_path(void); |
| 912 | void btrfs_free_path(struct btrfs_path *p); |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 913 | void btrfs_init_path(struct btrfs_path *p); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 914 | int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 915 | struct btrfs_path *path); |
| 916 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| 917 | *root, struct btrfs_key *key, void *data, u32 data_size); |
| 918 | int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| 919 | *root, struct btrfs_path *path, struct btrfs_key |
| 920 | *cpu_key, u32 data_size); |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 921 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 922 | int btrfs_leaf_free_space(struct btrfs_root *root, struct btrfs_leaf *leaf); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 923 | int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 924 | *root, struct buffer_head *snap); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 925 | /* root-item.c */ |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 926 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 927 | struct btrfs_key *key); |
| 928 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root |
| 929 | *root, struct btrfs_key *key, struct btrfs_root_item |
| 930 | *item); |
| 931 | int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root |
| 932 | *root, struct btrfs_key *key, struct btrfs_root_item |
| 933 | *item); |
| 934 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct |
| 935 | btrfs_root_item *item, struct btrfs_key *key); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 936 | /* dir-item.c */ |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 937 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 938 | *root, const char *name, int name_len, u64 dir, |
| 939 | struct btrfs_key *location, u8 type); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 940 | int btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 941 | *root, struct btrfs_path *path, u64 dir, |
| 942 | const char *name, int name_len, int mod); |
Chris Mason | 5f26f77 | 2007-04-05 10:38:44 -0400 | [diff] [blame] | 943 | int btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, |
| 944 | struct btrfs_root *root, |
| 945 | struct btrfs_path *path, u64 dir, |
| 946 | u64 objectid, int mod); |
Chris Mason | 1d4f640 | 2007-03-15 15:18:43 -0400 | [diff] [blame] | 947 | int btrfs_match_dir_item_name(struct btrfs_root *root, struct btrfs_path *path, |
Chris Mason | 7f5c151 | 2007-03-23 15:56:19 -0400 | [diff] [blame] | 948 | const char *name, int name_len); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 949 | /* inode-map.c */ |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 950 | int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, |
| 951 | struct btrfs_root *fs_root, |
| 952 | u64 dirid, u64 *objectid); |
Chris Mason | 5be6f7f | 2007-04-05 13:35:25 -0400 | [diff] [blame] | 953 | int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); |
| 954 | |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 955 | /* inode-item.c */ |
Chris Mason | 293ffd5 | 2007-03-20 15:57:25 -0400 | [diff] [blame] | 956 | int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
| 957 | *root, u64 objectid, struct btrfs_inode_item |
| 958 | *inode_item); |
| 959 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 960 | *root, struct btrfs_path *path, |
| 961 | struct btrfs_key *location, int mod); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 962 | |
| 963 | /* file-item.c */ |
| 964 | int btrfs_alloc_file_extent(struct btrfs_trans_handle *trans, |
| 965 | struct btrfs_root *root, |
| 966 | u64 objectid, u64 offset, |
| 967 | u64 num_blocks, u64 hint_block, |
| 968 | u64 *result); |
| 969 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
| 970 | struct btrfs_root *root, |
| 971 | struct btrfs_path *path, u64 objectid, |
Chris Mason | 9773a78 | 2007-03-27 11:26:26 -0400 | [diff] [blame] | 972 | u64 blocknr, int mod); |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 973 | int btrfs_csum_file_block(struct btrfs_trans_handle *trans, |
| 974 | struct btrfs_root *root, |
| 975 | u64 objectid, u64 offset, |
| 976 | char *data, size_t len); |
| 977 | int btrfs_csum_verify_file_block(struct btrfs_root *root, |
| 978 | u64 objectid, u64 offset, |
| 979 | char *data, size_t len); |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 980 | /* super.c */ |
| 981 | extern struct subsystem btrfs_subsys; |
| 982 | |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 983 | #endif |