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 |
Chris Mason | 0bd93ba | 2007-04-11 13:57:44 -0400 | [diff] [blame] | 16 | #define BTRFS_DEV_TREE_OBJECTID 2ULL |
| 17 | #define BTRFS_EXTENT_TREE_OBJECTID 3ULL |
| 18 | #define BTRFS_FS_TREE_OBJECTID 4ULL |
| 19 | #define BTRFS_ROOT_TREE_DIR_OBJECTID 5ULL |
| 20 | #define BTRFS_FIRST_FREE_OBJECTID 6ULL |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 21 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 22 | /* |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 23 | * we can actually store much bigger names, but lets not confuse the rest |
| 24 | * of linux |
| 25 | */ |
| 26 | #define BTRFS_NAME_LEN 255 |
| 27 | |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 28 | /* 32 bytes in various csum fields */ |
| 29 | #define BTRFS_CSUM_SIZE 32 |
| 30 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 31 | /* |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 32 | * the key defines the order in the tree, and so it also defines (optimal) |
| 33 | * block layout. objectid corresonds to the inode number. The flags |
| 34 | * tells us things about the object, and is a kind of stream selector. |
| 35 | * so for a given inode, keys with flags of 1 might refer to the inode |
| 36 | * data, flags of 2 may point to file data in the btree and flags == 3 |
| 37 | * may point to extents. |
| 38 | * |
| 39 | * offset is the starting byte offset for this key in the stream. |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 40 | * |
| 41 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always |
| 42 | * in cpu native order. Otherwise they are identical and their sizes |
| 43 | * should be the same (ie both packed) |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 44 | */ |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 45 | struct btrfs_disk_key { |
| 46 | __le64 objectid; |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 47 | __le32 flags; |
Chris Mason | 70b2bef | 2007-04-17 15:39:32 -0400 | [diff] [blame] | 48 | __le64 offset; |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 49 | } __attribute__ ((__packed__)); |
| 50 | |
| 51 | struct btrfs_key { |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 52 | u64 objectid; |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 53 | u32 flags; |
Chris Mason | 70b2bef | 2007-04-17 15:39:32 -0400 | [diff] [blame] | 54 | u64 offset; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 55 | } __attribute__ ((__packed__)); |
| 56 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 57 | /* |
| 58 | * every tree block (leaf or node) starts with this header. |
| 59 | */ |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 60 | struct btrfs_header { |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 61 | u8 csum[BTRFS_CSUM_SIZE]; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 62 | u8 fsid[16]; /* FS specific uuid */ |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 63 | __le64 blocknr; /* which block this node is supposed to live in */ |
Chris Mason | 7f5c151 | 2007-03-23 15:56:19 -0400 | [diff] [blame] | 64 | __le64 generation; |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 65 | __le16 nritems; |
| 66 | __le16 flags; |
Chris Mason | 9a6f11e | 2007-03-27 09:06:38 -0400 | [diff] [blame] | 67 | u8 level; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 68 | } __attribute__ ((__packed__)); |
| 69 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 70 | #define BTRFS_MAX_LEVEL 8 |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 71 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->blocksize - \ |
| 72 | sizeof(struct btrfs_header)) / \ |
| 73 | (sizeof(struct btrfs_disk_key) + sizeof(u64))) |
| 74 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
| 75 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->blocksize)) |
Chris Mason | 236454df | 2007-04-19 13:37:44 -0400 | [diff] [blame^] | 76 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
| 77 | sizeof(struct btrfs_item) - \ |
| 78 | sizeof(struct btrfs_file_extent_item)) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 79 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 80 | struct buffer_head; |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 81 | /* |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 82 | * the super block basically lists the main trees of the FS |
| 83 | * it currently lacks any block count etc etc |
| 84 | */ |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 85 | struct btrfs_super_block { |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 86 | u8 csum[BTRFS_CSUM_SIZE]; |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 87 | /* the first 3 fields must match struct btrfs_header */ |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 88 | u8 fsid[16]; /* FS specific uuid */ |
| 89 | __le64 blocknr; /* this block number */ |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 90 | __le64 magic; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 91 | __le32 blocksize; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 92 | __le64 generation; |
| 93 | __le64 root; |
| 94 | __le64 total_blocks; |
| 95 | __le64 blocks_used; |
Chris Mason | 2e635a2 | 2007-03-21 11:12:56 -0400 | [diff] [blame] | 96 | __le64 root_dir_objectid; |
Chris Mason | b4100d6 | 2007-04-12 12:14:00 -0400 | [diff] [blame] | 97 | __le64 last_device_id; |
Chris Mason | 0bd93ba | 2007-04-11 13:57:44 -0400 | [diff] [blame] | 98 | /* fields below here vary with the underlying disk */ |
| 99 | __le64 device_block_start; |
| 100 | __le64 device_num_blocks; |
| 101 | __le64 device_root; |
Chris Mason | b4100d6 | 2007-04-12 12:14:00 -0400 | [diff] [blame] | 102 | __le64 device_id; |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 103 | } __attribute__ ((__packed__)); |
| 104 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 105 | /* |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 106 | * 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] | 107 | * the item in the leaf (relative to the start of the data area) |
| 108 | */ |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 109 | struct btrfs_item { |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 110 | struct btrfs_disk_key key; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 111 | __le32 offset; |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 112 | __le16 size; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 113 | } __attribute__ ((__packed__)); |
| 114 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 115 | /* |
| 116 | * leaves have an item area and a data area: |
| 117 | * [item0, item1....itemN] [free space] [dataN...data1, data0] |
| 118 | * |
| 119 | * The data is separate from the items to get the keys closer together |
| 120 | * during searches. |
| 121 | */ |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 122 | struct btrfs_leaf { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 123 | struct btrfs_header header; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 124 | struct btrfs_item items[]; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 125 | } __attribute__ ((__packed__)); |
| 126 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 127 | /* |
| 128 | * all non-leaf blocks are nodes, they hold only keys and pointers to |
| 129 | * other blocks |
| 130 | */ |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 131 | struct btrfs_key_ptr { |
| 132 | struct btrfs_disk_key key; |
| 133 | __le64 blockptr; |
| 134 | } __attribute__ ((__packed__)); |
| 135 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 136 | struct btrfs_node { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 137 | struct btrfs_header header; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 138 | struct btrfs_key_ptr ptrs[]; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 139 | } __attribute__ ((__packed__)); |
| 140 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 141 | /* |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 142 | * btrfs_paths remember the path taken from the root down to the leaf. |
| 143 | * 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] | 144 | * to any other levels that are present. |
| 145 | * |
| 146 | * The slots array records the index of the item or block pointer |
| 147 | * used while walking the tree. |
| 148 | */ |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 149 | struct btrfs_path { |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 150 | struct buffer_head *nodes[BTRFS_MAX_LEVEL]; |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 151 | int slots[BTRFS_MAX_LEVEL]; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 152 | }; |
Chris Mason | 5de08d7 | 2007-02-24 06:24:44 -0500 | [diff] [blame] | 153 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 154 | /* |
| 155 | * items in the extent btree are used to record the objectid of the |
| 156 | * owner of the block and the number of references |
| 157 | */ |
| 158 | struct btrfs_extent_item { |
| 159 | __le32 refs; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 160 | } __attribute__ ((__packed__)); |
| 161 | |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 162 | struct btrfs_inode_timespec { |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 163 | __le64 sec; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 164 | __le32 nsec; |
| 165 | } __attribute__ ((__packed__)); |
| 166 | |
| 167 | /* |
| 168 | * there is no padding here on purpose. If you want to extent the inode, |
| 169 | * make a new item type |
| 170 | */ |
| 171 | struct btrfs_inode_item { |
| 172 | __le64 generation; |
| 173 | __le64 size; |
| 174 | __le64 nblocks; |
| 175 | __le32 nlink; |
| 176 | __le32 uid; |
| 177 | __le32 gid; |
| 178 | __le32 mode; |
| 179 | __le32 rdev; |
| 180 | __le16 flags; |
| 181 | __le16 compat_flags; |
| 182 | struct btrfs_inode_timespec atime; |
| 183 | struct btrfs_inode_timespec ctime; |
| 184 | struct btrfs_inode_timespec mtime; |
| 185 | struct btrfs_inode_timespec otime; |
| 186 | } __attribute__ ((__packed__)); |
| 187 | |
| 188 | /* inline data is just a blob of bytes */ |
| 189 | struct btrfs_inline_data_item { |
| 190 | u8 data; |
| 191 | } __attribute__ ((__packed__)); |
| 192 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 193 | struct btrfs_dir_item { |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 194 | struct btrfs_disk_key location; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 195 | __le16 flags; |
Chris Mason | a8a2ee0 | 2007-03-16 08:46:49 -0400 | [diff] [blame] | 196 | __le16 name_len; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 197 | u8 type; |
| 198 | } __attribute__ ((__packed__)); |
| 199 | |
| 200 | struct btrfs_root_item { |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 201 | struct btrfs_inode_item inode; |
| 202 | __le64 root_dirid; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 203 | __le64 blocknr; |
| 204 | __le32 flags; |
| 205 | __le64 block_limit; |
| 206 | __le64 blocks_used; |
| 207 | __le32 refs; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 208 | } __attribute__ ((__packed__)); |
| 209 | |
Chris Mason | 236454df | 2007-04-19 13:37:44 -0400 | [diff] [blame^] | 210 | #define BTRFS_FILE_EXTENT_REG 0 |
| 211 | #define BTRFS_FILE_EXTENT_INLINE 1 |
| 212 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 213 | struct btrfs_file_extent_item { |
Chris Mason | 71951f3 | 2007-03-27 09:16:29 -0400 | [diff] [blame] | 214 | __le64 generation; |
Chris Mason | 236454df | 2007-04-19 13:37:44 -0400 | [diff] [blame^] | 215 | u8 type; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 216 | /* |
| 217 | * disk space consumed by the extent, checksum blocks are included |
| 218 | * in these numbers |
| 219 | */ |
| 220 | __le64 disk_blocknr; |
| 221 | __le64 disk_num_blocks; |
| 222 | /* |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 223 | * the logical offset in file blocks (no csums) |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 224 | * this extent record is for. This allows a file extent to point |
| 225 | * into the middle of an existing extent on disk, sharing it |
| 226 | * between two snapshots (useful if some bytes in the middle of the |
| 227 | * extent have changed |
| 228 | */ |
| 229 | __le64 offset; |
| 230 | /* |
| 231 | * the logical number of file blocks (no csums included) |
| 232 | */ |
| 233 | __le64 num_blocks; |
| 234 | } __attribute__ ((__packed__)); |
| 235 | |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 236 | struct btrfs_csum_item { |
| 237 | u8 csum[BTRFS_CSUM_SIZE]; |
| 238 | } __attribute__ ((__packed__)); |
| 239 | |
Chris Mason | 0bd93ba | 2007-04-11 13:57:44 -0400 | [diff] [blame] | 240 | struct btrfs_device_item { |
| 241 | __le16 pathlen; |
Chris Mason | b4100d6 | 2007-04-12 12:14:00 -0400 | [diff] [blame] | 242 | __le64 device_id; |
Chris Mason | 0bd93ba | 2007-04-11 13:57:44 -0400 | [diff] [blame] | 243 | } __attribute__ ((__packed__)); |
| 244 | |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 245 | struct crypto_hash; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 246 | struct btrfs_fs_info { |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 247 | struct btrfs_root *extent_root; |
| 248 | struct btrfs_root *tree_root; |
Chris Mason | 0bd93ba | 2007-04-11 13:57:44 -0400 | [diff] [blame] | 249 | struct btrfs_root *dev_root; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 250 | struct btrfs_key current_insert; |
| 251 | struct btrfs_key last_insert; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 252 | struct radix_tree_root fs_roots_radix; |
Chris Mason | 8ef9762 | 2007-03-26 10:15:30 -0400 | [diff] [blame] | 253 | struct radix_tree_root pending_del_radix; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 254 | struct radix_tree_root pinned_radix; |
Chris Mason | 7eccb90 | 2007-04-11 15:53:25 -0400 | [diff] [blame] | 255 | struct radix_tree_root dev_radix; |
Chris Mason | 293ffd5 | 2007-03-20 15:57:25 -0400 | [diff] [blame] | 256 | u64 generation; |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 257 | struct btrfs_transaction *running_transaction; |
Chris Mason | 1261ec4 | 2007-03-20 20:35:03 -0400 | [diff] [blame] | 258 | struct btrfs_super_block *disk_super; |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 259 | struct buffer_head *sb_buffer; |
| 260 | struct super_block *sb; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 261 | struct inode *btree_inode; |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 262 | struct mutex trans_mutex; |
Chris Mason | d561c02 | 2007-03-23 19:47:49 -0400 | [diff] [blame] | 263 | struct mutex fs_mutex; |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 264 | struct crypto_hash *hash_tfm; |
| 265 | spinlock_t hash_lock; |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 266 | struct kobject kobj; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 267 | }; |
| 268 | |
| 269 | /* |
| 270 | * in ram representation of the tree. extent_root is used for all allocations |
| 271 | * and for the extent tree extent_root root. current_insert is used |
| 272 | * only for the extent tree. |
| 273 | */ |
| 274 | struct btrfs_root { |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 275 | struct buffer_head *node; |
| 276 | struct buffer_head *commit_root; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 277 | struct btrfs_root_item root_item; |
| 278 | struct btrfs_key root_key; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 279 | struct btrfs_fs_info *fs_info; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 280 | struct inode *inode; |
| 281 | u64 objectid; |
| 282 | u64 last_trans; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 283 | u32 blocksize; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 284 | int ref_cows; |
| 285 | u32 type; |
Chris Mason | 1b05da2 | 2007-04-10 12:13:09 -0400 | [diff] [blame] | 286 | u64 highest_inode; |
| 287 | u64 last_inode_alloc; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 288 | }; |
| 289 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 290 | /* the lower bits in the key flags defines the item type */ |
| 291 | #define BTRFS_KEY_TYPE_MAX 256 |
Chris Mason | a429e51 | 2007-04-18 16:15:28 -0400 | [diff] [blame] | 292 | #define BTRFS_KEY_TYPE_SHIFT 24 |
| 293 | #define BTRFS_KEY_TYPE_MASK (((u32)BTRFS_KEY_TYPE_MAX - 1) << \ |
| 294 | BTRFS_KEY_TYPE_SHIFT) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 295 | |
Chris Mason | 7fcde0e | 2007-04-05 12:13:21 -0400 | [diff] [blame] | 296 | #define BTRFS_KEY_OVERFLOW_MAX 128 |
Chris Mason | a429e51 | 2007-04-18 16:15:28 -0400 | [diff] [blame] | 297 | #define BTRFS_KEY_OVERFLOW_MASK ((u32)BTRFS_KEY_OVERFLOW_MAX - 1) |
Chris Mason | 7fcde0e | 2007-04-05 12:13:21 -0400 | [diff] [blame] | 298 | |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 299 | /* |
| 300 | * inode items have the data typically returned from stat and store other |
| 301 | * info about object characteristics. There is one for every file and dir in |
| 302 | * the FS |
| 303 | */ |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 304 | #define BTRFS_INODE_ITEM_KEY 1 |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 305 | |
| 306 | /* |
| 307 | * dir items are the name -> inode pointers in a directory. There is one |
| 308 | * for every name in a directory. |
| 309 | */ |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 310 | #define BTRFS_DIR_ITEM_KEY 2 |
Chris Mason | bae45de | 2007-04-04 21:22:22 -0400 | [diff] [blame] | 311 | #define BTRFS_DIR_INDEX_KEY 3 |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 312 | /* |
| 313 | * inline data is file data that fits in the btree. |
| 314 | */ |
Chris Mason | bae45de | 2007-04-04 21:22:22 -0400 | [diff] [blame] | 315 | #define BTRFS_INLINE_DATA_KEY 4 |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 316 | /* |
| 317 | * extent data is for data that can't fit in the btree. It points to |
| 318 | * a (hopefully) huge chunk of disk |
| 319 | */ |
Chris Mason | bae45de | 2007-04-04 21:22:22 -0400 | [diff] [blame] | 320 | #define BTRFS_EXTENT_DATA_KEY 5 |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 321 | /* |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 322 | * csum items have the checksums for data in the extents |
| 323 | */ |
Chris Mason | bae45de | 2007-04-04 21:22:22 -0400 | [diff] [blame] | 324 | #define BTRFS_CSUM_ITEM_KEY 6 |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 325 | |
| 326 | /* |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 327 | * root items point to tree roots. There are typically in the root |
| 328 | * tree used by the super block to find all the other trees |
| 329 | */ |
Chris Mason | bae45de | 2007-04-04 21:22:22 -0400 | [diff] [blame] | 330 | #define BTRFS_ROOT_ITEM_KEY 7 |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 331 | /* |
| 332 | * extent items are in the extent map tree. These record which blocks |
| 333 | * are used, and how many references there are to each block |
| 334 | */ |
Chris Mason | bae45de | 2007-04-04 21:22:22 -0400 | [diff] [blame] | 335 | #define BTRFS_EXTENT_ITEM_KEY 8 |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 336 | |
| 337 | /* |
Chris Mason | 0bd93ba | 2007-04-11 13:57:44 -0400 | [diff] [blame] | 338 | * dev items list the devices that make up the FS |
| 339 | */ |
| 340 | #define BTRFS_DEV_ITEM_KEY 9 |
| 341 | |
| 342 | /* |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 343 | * string items are for debugging. They just store a short string of |
| 344 | * data in the FS |
| 345 | */ |
Chris Mason | 0bd93ba | 2007-04-11 13:57:44 -0400 | [diff] [blame] | 346 | #define BTRFS_STRING_ITEM_KEY 10 |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 347 | |
| 348 | static inline u64 btrfs_inode_generation(struct btrfs_inode_item *i) |
| 349 | { |
| 350 | return le64_to_cpu(i->generation); |
| 351 | } |
| 352 | |
| 353 | static inline void btrfs_set_inode_generation(struct btrfs_inode_item *i, |
| 354 | u64 val) |
| 355 | { |
| 356 | i->generation = cpu_to_le64(val); |
| 357 | } |
| 358 | |
| 359 | static inline u64 btrfs_inode_size(struct btrfs_inode_item *i) |
| 360 | { |
| 361 | return le64_to_cpu(i->size); |
| 362 | } |
| 363 | |
| 364 | static inline void btrfs_set_inode_size(struct btrfs_inode_item *i, u64 val) |
| 365 | { |
| 366 | i->size = cpu_to_le64(val); |
| 367 | } |
| 368 | |
| 369 | static inline u64 btrfs_inode_nblocks(struct btrfs_inode_item *i) |
| 370 | { |
| 371 | return le64_to_cpu(i->nblocks); |
| 372 | } |
| 373 | |
| 374 | static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item *i, u64 val) |
| 375 | { |
| 376 | i->nblocks = cpu_to_le64(val); |
| 377 | } |
| 378 | |
| 379 | static inline u32 btrfs_inode_nlink(struct btrfs_inode_item *i) |
| 380 | { |
| 381 | return le32_to_cpu(i->nlink); |
| 382 | } |
| 383 | |
| 384 | static inline void btrfs_set_inode_nlink(struct btrfs_inode_item *i, u32 val) |
| 385 | { |
| 386 | i->nlink = cpu_to_le32(val); |
| 387 | } |
| 388 | |
| 389 | static inline u32 btrfs_inode_uid(struct btrfs_inode_item *i) |
| 390 | { |
| 391 | return le32_to_cpu(i->uid); |
| 392 | } |
| 393 | |
| 394 | static inline void btrfs_set_inode_uid(struct btrfs_inode_item *i, u32 val) |
| 395 | { |
| 396 | i->uid = cpu_to_le32(val); |
| 397 | } |
| 398 | |
| 399 | static inline u32 btrfs_inode_gid(struct btrfs_inode_item *i) |
| 400 | { |
| 401 | return le32_to_cpu(i->gid); |
| 402 | } |
| 403 | |
| 404 | static inline void btrfs_set_inode_gid(struct btrfs_inode_item *i, u32 val) |
| 405 | { |
| 406 | i->gid = cpu_to_le32(val); |
| 407 | } |
| 408 | |
| 409 | static inline u32 btrfs_inode_mode(struct btrfs_inode_item *i) |
| 410 | { |
| 411 | return le32_to_cpu(i->mode); |
| 412 | } |
| 413 | |
| 414 | static inline void btrfs_set_inode_mode(struct btrfs_inode_item *i, u32 val) |
| 415 | { |
| 416 | i->mode = cpu_to_le32(val); |
| 417 | } |
| 418 | |
| 419 | static inline u32 btrfs_inode_rdev(struct btrfs_inode_item *i) |
| 420 | { |
| 421 | return le32_to_cpu(i->rdev); |
| 422 | } |
| 423 | |
| 424 | static inline void btrfs_set_inode_rdev(struct btrfs_inode_item *i, u32 val) |
| 425 | { |
| 426 | i->rdev = cpu_to_le32(val); |
| 427 | } |
| 428 | |
| 429 | static inline u16 btrfs_inode_flags(struct btrfs_inode_item *i) |
| 430 | { |
| 431 | return le16_to_cpu(i->flags); |
| 432 | } |
| 433 | |
| 434 | static inline void btrfs_set_inode_flags(struct btrfs_inode_item *i, u16 val) |
| 435 | { |
| 436 | i->flags = cpu_to_le16(val); |
| 437 | } |
| 438 | |
| 439 | static inline u16 btrfs_inode_compat_flags(struct btrfs_inode_item *i) |
| 440 | { |
| 441 | return le16_to_cpu(i->compat_flags); |
| 442 | } |
| 443 | |
| 444 | static inline void btrfs_set_inode_compat_flags(struct btrfs_inode_item *i, |
| 445 | u16 val) |
| 446 | { |
| 447 | i->compat_flags = cpu_to_le16(val); |
| 448 | } |
| 449 | |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 450 | static inline u64 btrfs_timespec_sec(struct btrfs_inode_timespec *ts) |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 451 | { |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 452 | return le64_to_cpu(ts->sec); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 453 | } |
| 454 | |
| 455 | static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec *ts, |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 456 | u64 val) |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 457 | { |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 458 | ts->sec = cpu_to_le64(val); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 459 | } |
| 460 | |
| 461 | static inline u32 btrfs_timespec_nsec(struct btrfs_inode_timespec *ts) |
| 462 | { |
| 463 | return le32_to_cpu(ts->nsec); |
| 464 | } |
| 465 | |
| 466 | static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec *ts, |
| 467 | u32 val) |
| 468 | { |
| 469 | ts->nsec = cpu_to_le32(val); |
| 470 | } |
| 471 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 472 | static inline u32 btrfs_extent_refs(struct btrfs_extent_item *ei) |
Chris Mason | cf27e1e | 2007-03-13 09:49:06 -0400 | [diff] [blame] | 473 | { |
| 474 | return le32_to_cpu(ei->refs); |
| 475 | } |
| 476 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 477 | 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] | 478 | { |
| 479 | ei->refs = cpu_to_le32(val); |
| 480 | } |
| 481 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 482 | static inline u64 btrfs_node_blockptr(struct btrfs_node *n, int nr) |
Chris Mason | 1d4f8a0 | 2007-03-13 09:28:32 -0400 | [diff] [blame] | 483 | { |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 484 | return le64_to_cpu(n->ptrs[nr].blockptr); |
Chris Mason | 1d4f8a0 | 2007-03-13 09:28:32 -0400 | [diff] [blame] | 485 | } |
| 486 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 487 | static inline void btrfs_set_node_blockptr(struct btrfs_node *n, int nr, |
| 488 | u64 val) |
Chris Mason | 1d4f8a0 | 2007-03-13 09:28:32 -0400 | [diff] [blame] | 489 | { |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 490 | n->ptrs[nr].blockptr = cpu_to_le64(val); |
Chris Mason | 1d4f8a0 | 2007-03-13 09:28:32 -0400 | [diff] [blame] | 491 | } |
| 492 | |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 493 | static inline u32 btrfs_item_offset(struct btrfs_item *item) |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 494 | { |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 495 | return le32_to_cpu(item->offset); |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 496 | } |
| 497 | |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 498 | 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] | 499 | { |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 500 | item->offset = cpu_to_le32(val); |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 501 | } |
| 502 | |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 503 | static inline u32 btrfs_item_end(struct btrfs_item *item) |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 504 | { |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 505 | return le32_to_cpu(item->offset) + le16_to_cpu(item->size); |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 506 | } |
| 507 | |
| 508 | static inline u16 btrfs_item_size(struct btrfs_item *item) |
| 509 | { |
| 510 | return le16_to_cpu(item->size); |
| 511 | } |
| 512 | |
| 513 | static inline void btrfs_set_item_size(struct btrfs_item *item, u16 val) |
| 514 | { |
| 515 | item->size = cpu_to_le16(val); |
| 516 | } |
| 517 | |
Chris Mason | 1d4f640 | 2007-03-15 15:18:43 -0400 | [diff] [blame] | 518 | static inline u16 btrfs_dir_flags(struct btrfs_dir_item *d) |
| 519 | { |
| 520 | return le16_to_cpu(d->flags); |
| 521 | } |
| 522 | |
| 523 | static inline void btrfs_set_dir_flags(struct btrfs_dir_item *d, u16 val) |
| 524 | { |
| 525 | d->flags = cpu_to_le16(val); |
| 526 | } |
| 527 | |
| 528 | static inline u8 btrfs_dir_type(struct btrfs_dir_item *d) |
| 529 | { |
| 530 | return d->type; |
| 531 | } |
| 532 | |
| 533 | static inline void btrfs_set_dir_type(struct btrfs_dir_item *d, u8 val) |
| 534 | { |
| 535 | d->type = val; |
| 536 | } |
| 537 | |
Chris Mason | a8a2ee0 | 2007-03-16 08:46:49 -0400 | [diff] [blame] | 538 | static inline u16 btrfs_dir_name_len(struct btrfs_dir_item *d) |
Chris Mason | 1d4f640 | 2007-03-15 15:18:43 -0400 | [diff] [blame] | 539 | { |
Chris Mason | a8a2ee0 | 2007-03-16 08:46:49 -0400 | [diff] [blame] | 540 | return le16_to_cpu(d->name_len); |
| 541 | } |
| 542 | |
| 543 | static inline void btrfs_set_dir_name_len(struct btrfs_dir_item *d, u16 val) |
| 544 | { |
| 545 | d->name_len = cpu_to_le16(val); |
Chris Mason | 1d4f640 | 2007-03-15 15:18:43 -0400 | [diff] [blame] | 546 | } |
| 547 | |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 548 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
| 549 | struct btrfs_disk_key *disk) |
| 550 | { |
| 551 | cpu->offset = le64_to_cpu(disk->offset); |
| 552 | cpu->flags = le32_to_cpu(disk->flags); |
| 553 | cpu->objectid = le64_to_cpu(disk->objectid); |
| 554 | } |
| 555 | |
| 556 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, |
| 557 | struct btrfs_key *cpu) |
| 558 | { |
| 559 | disk->offset = cpu_to_le64(cpu->offset); |
| 560 | disk->flags = cpu_to_le32(cpu->flags); |
| 561 | disk->objectid = cpu_to_le64(cpu->objectid); |
| 562 | } |
| 563 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 564 | static inline u64 btrfs_disk_key_objectid(struct btrfs_disk_key *disk) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 565 | { |
| 566 | return le64_to_cpu(disk->objectid); |
| 567 | } |
| 568 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 569 | static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key *disk, |
| 570 | u64 val) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 571 | { |
| 572 | disk->objectid = cpu_to_le64(val); |
| 573 | } |
| 574 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 575 | static inline u64 btrfs_disk_key_offset(struct btrfs_disk_key *disk) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 576 | { |
| 577 | return le64_to_cpu(disk->offset); |
| 578 | } |
| 579 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 580 | static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key *disk, |
| 581 | u64 val) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 582 | { |
| 583 | disk->offset = cpu_to_le64(val); |
| 584 | } |
| 585 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 586 | static inline u32 btrfs_disk_key_flags(struct btrfs_disk_key *disk) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 587 | { |
| 588 | return le32_to_cpu(disk->flags); |
| 589 | } |
| 590 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 591 | static inline void btrfs_set_disk_key_flags(struct btrfs_disk_key *disk, |
| 592 | u32 val) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 593 | { |
| 594 | disk->flags = cpu_to_le32(val); |
| 595 | } |
| 596 | |
Chris Mason | a429e51 | 2007-04-18 16:15:28 -0400 | [diff] [blame] | 597 | static inline u32 btrfs_disk_key_type(struct btrfs_disk_key *key) |
| 598 | { |
| 599 | return le32_to_cpu(key->flags) >> BTRFS_KEY_TYPE_SHIFT; |
| 600 | } |
| 601 | |
| 602 | static inline void btrfs_set_disk_key_type(struct btrfs_disk_key *key, |
| 603 | u32 val) |
| 604 | { |
| 605 | u32 flags = btrfs_disk_key_flags(key); |
| 606 | BUG_ON(val >= BTRFS_KEY_TYPE_MAX); |
| 607 | val = val << BTRFS_KEY_TYPE_SHIFT; |
| 608 | flags = (flags & ~BTRFS_KEY_TYPE_MASK) | val; |
| 609 | btrfs_set_disk_key_flags(key, flags); |
| 610 | } |
| 611 | |
| 612 | static inline u32 btrfs_key_type(struct btrfs_key *key) |
| 613 | { |
| 614 | return key->flags >> BTRFS_KEY_TYPE_SHIFT; |
| 615 | } |
| 616 | |
| 617 | static inline void btrfs_set_key_type(struct btrfs_key *key, u32 val) |
| 618 | { |
| 619 | BUG_ON(val >= BTRFS_KEY_TYPE_MAX); |
| 620 | val = val << BTRFS_KEY_TYPE_SHIFT; |
| 621 | key->flags = (key->flags & ~(BTRFS_KEY_TYPE_MASK)) | val; |
| 622 | } |
| 623 | |
Chris Mason | 7fcde0e | 2007-04-05 12:13:21 -0400 | [diff] [blame] | 624 | static inline u32 btrfs_key_overflow(struct btrfs_key *key) |
| 625 | { |
Chris Mason | a429e51 | 2007-04-18 16:15:28 -0400 | [diff] [blame] | 626 | return key->flags & BTRFS_KEY_OVERFLOW_MASK; |
Chris Mason | 7fcde0e | 2007-04-05 12:13:21 -0400 | [diff] [blame] | 627 | } |
| 628 | |
| 629 | static inline void btrfs_set_key_overflow(struct btrfs_key *key, u32 over) |
| 630 | { |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 631 | BUG_ON(over >= BTRFS_KEY_OVERFLOW_MAX); |
Chris Mason | a429e51 | 2007-04-18 16:15:28 -0400 | [diff] [blame] | 632 | key->flags = (key->flags & ~BTRFS_KEY_OVERFLOW_MASK) | over; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 633 | } |
| 634 | |
Chris Mason | 7fcde0e | 2007-04-05 12:13:21 -0400 | [diff] [blame] | 635 | static inline u32 btrfs_disk_key_overflow(struct btrfs_disk_key *key) |
| 636 | { |
Chris Mason | a429e51 | 2007-04-18 16:15:28 -0400 | [diff] [blame] | 637 | return le32_to_cpu(key->flags) & BTRFS_KEY_OVERFLOW_MASK; |
Chris Mason | 7fcde0e | 2007-04-05 12:13:21 -0400 | [diff] [blame] | 638 | } |
| 639 | |
Chris Mason | a429e51 | 2007-04-18 16:15:28 -0400 | [diff] [blame] | 640 | static inline void btrfs_set_disk_key_overflow(struct btrfs_disk_key *key, |
Chris Mason | 7fcde0e | 2007-04-05 12:13:21 -0400 | [diff] [blame] | 641 | u32 over) |
| 642 | { |
| 643 | u32 flags = btrfs_disk_key_flags(key); |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 644 | BUG_ON(over >= BTRFS_KEY_OVERFLOW_MAX); |
Chris Mason | a429e51 | 2007-04-18 16:15:28 -0400 | [diff] [blame] | 645 | flags = (flags & ~BTRFS_KEY_OVERFLOW_MASK) | over; |
Chris Mason | 7fcde0e | 2007-04-05 12:13:21 -0400 | [diff] [blame] | 646 | btrfs_set_disk_key_flags(key, flags); |
| 647 | } |
| 648 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 649 | static inline u64 btrfs_header_blocknr(struct btrfs_header *h) |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 650 | { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 651 | return le64_to_cpu(h->blocknr); |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 652 | } |
| 653 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 654 | 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] | 655 | { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 656 | h->blocknr = cpu_to_le64(blocknr); |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 657 | } |
| 658 | |
Chris Mason | 7f5c151 | 2007-03-23 15:56:19 -0400 | [diff] [blame] | 659 | static inline u64 btrfs_header_generation(struct btrfs_header *h) |
| 660 | { |
| 661 | return le64_to_cpu(h->generation); |
| 662 | } |
| 663 | |
| 664 | static inline void btrfs_set_header_generation(struct btrfs_header *h, |
| 665 | u64 val) |
| 666 | { |
| 667 | h->generation = cpu_to_le64(val); |
| 668 | } |
| 669 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 670 | static inline u16 btrfs_header_nritems(struct btrfs_header *h) |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 671 | { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 672 | return le16_to_cpu(h->nritems); |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 673 | } |
| 674 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 675 | 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] | 676 | { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 677 | h->nritems = cpu_to_le16(val); |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 678 | } |
| 679 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 680 | static inline u16 btrfs_header_flags(struct btrfs_header *h) |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 681 | { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 682 | return le16_to_cpu(h->flags); |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 683 | } |
| 684 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 685 | 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] | 686 | { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 687 | h->flags = cpu_to_le16(val); |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 688 | } |
| 689 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 690 | static inline int btrfs_header_level(struct btrfs_header *h) |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 691 | { |
Chris Mason | 9a6f11e | 2007-03-27 09:06:38 -0400 | [diff] [blame] | 692 | return h->level; |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 693 | } |
| 694 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 695 | 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] | 696 | { |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 697 | BUG_ON(level > BTRFS_MAX_LEVEL); |
Chris Mason | 9a6f11e | 2007-03-27 09:06:38 -0400 | [diff] [blame] | 698 | h->level = level; |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 699 | } |
| 700 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 701 | static inline int btrfs_is_leaf(struct btrfs_node *n) |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 702 | { |
| 703 | return (btrfs_header_level(&n->header) == 0); |
| 704 | } |
| 705 | |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 706 | static inline u64 btrfs_root_blocknr(struct btrfs_root_item *item) |
| 707 | { |
| 708 | return le64_to_cpu(item->blocknr); |
| 709 | } |
| 710 | |
| 711 | static inline void btrfs_set_root_blocknr(struct btrfs_root_item *item, u64 val) |
| 712 | { |
| 713 | item->blocknr = cpu_to_le64(val); |
| 714 | } |
| 715 | |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 716 | static inline u64 btrfs_root_dirid(struct btrfs_root_item *item) |
| 717 | { |
| 718 | return le64_to_cpu(item->root_dirid); |
| 719 | } |
| 720 | |
| 721 | static inline void btrfs_set_root_dirid(struct btrfs_root_item *item, u64 val) |
| 722 | { |
| 723 | item->root_dirid = cpu_to_le64(val); |
| 724 | } |
| 725 | |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 726 | static inline u32 btrfs_root_refs(struct btrfs_root_item *item) |
| 727 | { |
| 728 | return le32_to_cpu(item->refs); |
| 729 | } |
| 730 | |
| 731 | static inline void btrfs_set_root_refs(struct btrfs_root_item *item, u32 val) |
| 732 | { |
| 733 | item->refs = cpu_to_le32(val); |
| 734 | } |
| 735 | |
| 736 | static inline u64 btrfs_super_blocknr(struct btrfs_super_block *s) |
| 737 | { |
| 738 | return le64_to_cpu(s->blocknr); |
| 739 | } |
| 740 | |
| 741 | static inline void btrfs_set_super_blocknr(struct btrfs_super_block *s, u64 val) |
| 742 | { |
| 743 | s->blocknr = cpu_to_le64(val); |
| 744 | } |
| 745 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 746 | static inline u64 btrfs_super_generation(struct btrfs_super_block *s) |
| 747 | { |
| 748 | return le64_to_cpu(s->generation); |
| 749 | } |
| 750 | |
| 751 | static inline void btrfs_set_super_generation(struct btrfs_super_block *s, |
| 752 | u64 val) |
| 753 | { |
| 754 | s->generation = cpu_to_le64(val); |
| 755 | } |
| 756 | |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 757 | static inline u64 btrfs_super_root(struct btrfs_super_block *s) |
| 758 | { |
| 759 | return le64_to_cpu(s->root); |
| 760 | } |
| 761 | |
| 762 | static inline void btrfs_set_super_root(struct btrfs_super_block *s, u64 val) |
| 763 | { |
| 764 | s->root = cpu_to_le64(val); |
| 765 | } |
| 766 | |
| 767 | static inline u64 btrfs_super_total_blocks(struct btrfs_super_block *s) |
| 768 | { |
| 769 | return le64_to_cpu(s->total_blocks); |
| 770 | } |
| 771 | |
| 772 | static inline void btrfs_set_super_total_blocks(struct btrfs_super_block *s, |
| 773 | u64 val) |
| 774 | { |
| 775 | s->total_blocks = cpu_to_le64(val); |
| 776 | } |
| 777 | |
| 778 | static inline u64 btrfs_super_blocks_used(struct btrfs_super_block *s) |
| 779 | { |
| 780 | return le64_to_cpu(s->blocks_used); |
| 781 | } |
| 782 | |
| 783 | static inline void btrfs_set_super_blocks_used(struct btrfs_super_block *s, |
| 784 | u64 val) |
| 785 | { |
| 786 | s->blocks_used = cpu_to_le64(val); |
| 787 | } |
| 788 | |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 789 | static inline u32 btrfs_super_blocksize(struct btrfs_super_block *s) |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 790 | { |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 791 | return le32_to_cpu(s->blocksize); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 792 | } |
| 793 | |
| 794 | static inline void btrfs_set_super_blocksize(struct btrfs_super_block *s, |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 795 | u32 val) |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 796 | { |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 797 | s->blocksize = cpu_to_le32(val); |
| 798 | } |
| 799 | |
Chris Mason | 2e635a2 | 2007-03-21 11:12:56 -0400 | [diff] [blame] | 800 | static inline u64 btrfs_super_root_dir(struct btrfs_super_block *s) |
| 801 | { |
| 802 | return le64_to_cpu(s->root_dir_objectid); |
| 803 | } |
| 804 | |
| 805 | static inline void btrfs_set_super_root_dir(struct btrfs_super_block *s, u64 |
| 806 | val) |
| 807 | { |
| 808 | s->root_dir_objectid = cpu_to_le64(val); |
| 809 | } |
| 810 | |
Chris Mason | b4100d6 | 2007-04-12 12:14:00 -0400 | [diff] [blame] | 811 | static inline u64 btrfs_super_last_device_id(struct btrfs_super_block *s) |
| 812 | { |
| 813 | return le64_to_cpu(s->last_device_id); |
| 814 | } |
| 815 | |
| 816 | static inline void btrfs_set_super_last_device_id(struct btrfs_super_block *s, |
| 817 | u64 val) |
| 818 | { |
| 819 | s->last_device_id = cpu_to_le64(val); |
| 820 | } |
| 821 | |
| 822 | static inline u64 btrfs_super_device_id(struct btrfs_super_block *s) |
| 823 | { |
| 824 | return le64_to_cpu(s->device_id); |
| 825 | } |
| 826 | |
| 827 | static inline void btrfs_set_super_device_id(struct btrfs_super_block *s, |
| 828 | u64 val) |
| 829 | { |
| 830 | s->device_id = cpu_to_le64(val); |
| 831 | } |
| 832 | |
Chris Mason | 0bd93ba | 2007-04-11 13:57:44 -0400 | [diff] [blame] | 833 | static inline u64 btrfs_super_device_block_start(struct btrfs_super_block *s) |
| 834 | { |
| 835 | return le64_to_cpu(s->device_block_start); |
| 836 | } |
| 837 | |
| 838 | static inline void btrfs_set_super_device_block_start(struct btrfs_super_block |
| 839 | *s, u64 val) |
| 840 | { |
| 841 | s->device_block_start = cpu_to_le64(val); |
| 842 | } |
| 843 | |
| 844 | static inline u64 btrfs_super_device_num_blocks(struct btrfs_super_block *s) |
| 845 | { |
| 846 | return le64_to_cpu(s->device_num_blocks); |
| 847 | } |
| 848 | |
| 849 | static inline void btrfs_set_super_device_num_blocks(struct btrfs_super_block |
| 850 | *s, u64 val) |
| 851 | { |
| 852 | s->device_num_blocks = cpu_to_le64(val); |
| 853 | } |
| 854 | |
| 855 | static inline u64 btrfs_super_device_root(struct btrfs_super_block *s) |
| 856 | { |
| 857 | return le64_to_cpu(s->device_root); |
| 858 | } |
| 859 | |
| 860 | static inline void btrfs_set_super_device_root(struct btrfs_super_block |
| 861 | *s, u64 val) |
| 862 | { |
| 863 | s->device_root = cpu_to_le64(val); |
| 864 | } |
| 865 | |
| 866 | |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 867 | static inline u8 *btrfs_leaf_data(struct btrfs_leaf *l) |
| 868 | { |
| 869 | return (u8 *)l->items; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 870 | } |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 871 | |
Chris Mason | 236454df | 2007-04-19 13:37:44 -0400 | [diff] [blame^] | 872 | static inline int btrfs_file_extent_type(struct btrfs_file_extent_item *e) |
| 873 | { |
| 874 | return e->type; |
| 875 | } |
| 876 | static inline void btrfs_set_file_extent_type(struct btrfs_file_extent_item *e, |
| 877 | u8 val) |
| 878 | { |
| 879 | e->type = val; |
| 880 | } |
| 881 | |
| 882 | static inline char *btrfs_file_extent_inline_start(struct |
| 883 | btrfs_file_extent_item *e) |
| 884 | { |
| 885 | return (char *)(&e->disk_blocknr); |
| 886 | } |
| 887 | |
| 888 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) |
| 889 | { |
| 890 | return (unsigned long)(&((struct |
| 891 | btrfs_file_extent_item *)NULL)->disk_blocknr) + datasize; |
| 892 | } |
| 893 | |
| 894 | static inline u32 btrfs_file_extent_inline_len(struct btrfs_item *e) |
| 895 | { |
| 896 | struct btrfs_file_extent_item *fe = NULL; |
| 897 | return btrfs_item_size(e) - (unsigned long)(&fe->disk_blocknr); |
| 898 | } |
| 899 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 900 | static inline u64 btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item |
| 901 | *e) |
| 902 | { |
| 903 | return le64_to_cpu(e->disk_blocknr); |
| 904 | } |
| 905 | |
| 906 | static inline void btrfs_set_file_extent_disk_blocknr(struct |
| 907 | btrfs_file_extent_item |
| 908 | *e, u64 val) |
| 909 | { |
| 910 | e->disk_blocknr = cpu_to_le64(val); |
| 911 | } |
| 912 | |
Chris Mason | 71951f3 | 2007-03-27 09:16:29 -0400 | [diff] [blame] | 913 | static inline u64 btrfs_file_extent_generation(struct btrfs_file_extent_item *e) |
| 914 | { |
| 915 | return le64_to_cpu(e->generation); |
| 916 | } |
| 917 | |
| 918 | static inline void btrfs_set_file_extent_generation(struct |
| 919 | btrfs_file_extent_item *e, |
| 920 | u64 val) |
| 921 | { |
| 922 | e->generation = cpu_to_le64(val); |
| 923 | } |
| 924 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 925 | static inline u64 btrfs_file_extent_disk_num_blocks(struct |
| 926 | btrfs_file_extent_item *e) |
| 927 | { |
| 928 | return le64_to_cpu(e->disk_num_blocks); |
| 929 | } |
| 930 | |
| 931 | static inline void btrfs_set_file_extent_disk_num_blocks(struct |
| 932 | btrfs_file_extent_item |
| 933 | *e, u64 val) |
| 934 | { |
| 935 | e->disk_num_blocks = cpu_to_le64(val); |
| 936 | } |
| 937 | |
| 938 | static inline u64 btrfs_file_extent_offset(struct btrfs_file_extent_item *e) |
| 939 | { |
| 940 | return le64_to_cpu(e->offset); |
| 941 | } |
| 942 | |
| 943 | static inline void btrfs_set_file_extent_offset(struct btrfs_file_extent_item |
| 944 | *e, u64 val) |
| 945 | { |
| 946 | e->offset = cpu_to_le64(val); |
| 947 | } |
| 948 | |
| 949 | static inline u64 btrfs_file_extent_num_blocks(struct btrfs_file_extent_item |
| 950 | *e) |
| 951 | { |
| 952 | return le64_to_cpu(e->num_blocks); |
| 953 | } |
| 954 | |
| 955 | static inline void btrfs_set_file_extent_num_blocks(struct |
| 956 | btrfs_file_extent_item *e, |
| 957 | u64 val) |
| 958 | { |
| 959 | e->num_blocks = cpu_to_le64(val); |
| 960 | } |
| 961 | |
Chris Mason | 0bd93ba | 2007-04-11 13:57:44 -0400 | [diff] [blame] | 962 | static inline u16 btrfs_device_pathlen(struct btrfs_device_item *d) |
| 963 | { |
| 964 | return le16_to_cpu(d->pathlen); |
| 965 | } |
| 966 | |
| 967 | static inline void btrfs_set_device_pathlen(struct btrfs_device_item *d, |
| 968 | u16 val) |
| 969 | { |
| 970 | d->pathlen = cpu_to_le16(val); |
| 971 | } |
| 972 | |
Chris Mason | b4100d6 | 2007-04-12 12:14:00 -0400 | [diff] [blame] | 973 | static inline u64 btrfs_device_id(struct btrfs_device_item *d) |
| 974 | { |
| 975 | return le64_to_cpu(d->device_id); |
| 976 | } |
| 977 | |
| 978 | static inline void btrfs_set_device_id(struct btrfs_device_item *d, |
| 979 | u64 val) |
| 980 | { |
| 981 | d->device_id = cpu_to_le64(val); |
| 982 | } |
| 983 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 984 | static inline struct btrfs_root *btrfs_sb(struct super_block *sb) |
| 985 | { |
| 986 | return sb->s_fs_info; |
| 987 | } |
| 988 | |
Chris Mason | d602557 | 2007-03-30 14:27:56 -0400 | [diff] [blame] | 989 | static inline void btrfs_check_bounds(void *vptr, size_t len, |
| 990 | void *vcontainer, size_t container_len) |
| 991 | { |
| 992 | char *ptr = vptr; |
| 993 | char *container = vcontainer; |
| 994 | WARN_ON(ptr < container); |
| 995 | WARN_ON(ptr + len > container + container_len); |
| 996 | } |
| 997 | |
| 998 | static inline void btrfs_memcpy(struct btrfs_root *root, |
| 999 | void *dst_block, |
| 1000 | void *dst, const void *src, size_t nr) |
| 1001 | { |
| 1002 | btrfs_check_bounds(dst, nr, dst_block, root->fs_info->sb->s_blocksize); |
| 1003 | memcpy(dst, src, nr); |
| 1004 | } |
| 1005 | |
| 1006 | static inline void btrfs_memmove(struct btrfs_root *root, |
| 1007 | void *dst_block, |
| 1008 | void *dst, void *src, size_t nr) |
| 1009 | { |
| 1010 | btrfs_check_bounds(dst, nr, dst_block, root->fs_info->sb->s_blocksize); |
| 1011 | memmove(dst, src, nr); |
| 1012 | } |
| 1013 | |
| 1014 | static inline void btrfs_mark_buffer_dirty(struct buffer_head *bh) |
| 1015 | { |
| 1016 | WARN_ON(!atomic_read(&bh->b_count)); |
| 1017 | mark_buffer_dirty(bh); |
| 1018 | } |
| 1019 | |
Chris Mason | 4beb1b8 | 2007-03-14 10:31:29 -0400 | [diff] [blame] | 1020 | /* helper function to cast into the data area of the leaf. */ |
| 1021 | #define btrfs_item_ptr(leaf, slot, type) \ |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 1022 | ((type *)(btrfs_leaf_data(leaf) + \ |
| 1023 | btrfs_item_offset((leaf)->items + (slot)))) |
Chris Mason | 4beb1b8 | 2007-03-14 10:31:29 -0400 | [diff] [blame] | 1024 | |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 1025 | /* extent-tree.c */ |
Chris Mason | c5739bb | 2007-04-10 09:27:04 -0400 | [diff] [blame] | 1026 | int btrfs_inc_root_ref(struct btrfs_trans_handle *trans, |
| 1027 | struct btrfs_root *root); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1028 | struct buffer_head *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1029 | struct btrfs_root *root); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1030 | int btrfs_alloc_extent(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1031 | *root, u64 num_blocks, u64 search_start, u64 |
Chris Mason | d0dbc624 | 2007-04-10 12:36:36 -0400 | [diff] [blame] | 1032 | search_end, struct btrfs_key *ins); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1033 | 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] | 1034 | struct buffer_head *buf); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1035 | int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1036 | *root, u64 blocknr, u64 num_blocks, int pin); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1037 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, struct |
| 1038 | btrfs_root *root); |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 1039 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
| 1040 | struct btrfs_root *root, |
| 1041 | u64 blocknr, u64 num_blocks); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1042 | /* ctree.c */ |
Chris Mason | 6567e83 | 2007-04-16 09:22:45 -0400 | [diff] [blame] | 1043 | int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1044 | *root, struct btrfs_path *path, u32 data_size); |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 1045 | int btrfs_truncate_item(struct btrfs_trans_handle *trans, |
| 1046 | struct btrfs_root *root, |
| 1047 | struct btrfs_path *path, |
| 1048 | u32 new_size); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1049 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1050 | *root, struct btrfs_key *key, struct btrfs_path *p, int |
| 1051 | ins_len, int cow); |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 1052 | void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 1053 | struct btrfs_path *btrfs_alloc_path(void); |
| 1054 | void btrfs_free_path(struct btrfs_path *p); |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 1055 | void btrfs_init_path(struct btrfs_path *p); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1056 | int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 1057 | struct btrfs_path *path); |
| 1058 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1059 | *root, struct btrfs_key *key, void *data, u32 data_size); |
| 1060 | int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1061 | *root, struct btrfs_path *path, struct btrfs_key |
| 1062 | *cpu_key, u32 data_size); |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 1063 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 1064 | 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] | 1065 | int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1066 | *root, struct buffer_head *snap); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1067 | /* root-item.c */ |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1068 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 1069 | struct btrfs_key *key); |
| 1070 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1071 | *root, struct btrfs_key *key, struct btrfs_root_item |
| 1072 | *item); |
| 1073 | int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1074 | *root, struct btrfs_key *key, struct btrfs_root_item |
| 1075 | *item); |
| 1076 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct |
| 1077 | btrfs_root_item *item, struct btrfs_key *key); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1078 | /* dir-item.c */ |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1079 | 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] | 1080 | *root, const char *name, int name_len, u64 dir, |
| 1081 | struct btrfs_key *location, u8 type); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1082 | 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] | 1083 | *root, struct btrfs_path *path, u64 dir, |
| 1084 | const char *name, int name_len, int mod); |
Chris Mason | 5f26f77 | 2007-04-05 10:38:44 -0400 | [diff] [blame] | 1085 | int btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, |
| 1086 | struct btrfs_root *root, |
| 1087 | struct btrfs_path *path, u64 dir, |
| 1088 | u64 objectid, int mod); |
Chris Mason | 1d4f640 | 2007-03-15 15:18:43 -0400 | [diff] [blame] | 1089 | 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] | 1090 | const char *name, int name_len); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1091 | /* inode-map.c */ |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 1092 | int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, |
| 1093 | struct btrfs_root *fs_root, |
| 1094 | u64 dirid, u64 *objectid); |
Chris Mason | 5be6f7f | 2007-04-05 13:35:25 -0400 | [diff] [blame] | 1095 | int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); |
| 1096 | |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1097 | /* inode-item.c */ |
Chris Mason | 293ffd5 | 2007-03-20 15:57:25 -0400 | [diff] [blame] | 1098 | int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1099 | *root, u64 objectid, struct btrfs_inode_item |
| 1100 | *inode_item); |
| 1101 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 1102 | *root, struct btrfs_path *path, |
| 1103 | struct btrfs_key *location, int mod); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1104 | |
| 1105 | /* file-item.c */ |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 1106 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1107 | struct btrfs_root *root, |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 1108 | u64 objectid, u64 pos, u64 offset, |
| 1109 | u64 num_blocks); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1110 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
| 1111 | struct btrfs_root *root, |
| 1112 | struct btrfs_path *path, u64 objectid, |
Chris Mason | 9773a78 | 2007-03-27 11:26:26 -0400 | [diff] [blame] | 1113 | u64 blocknr, int mod); |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 1114 | int btrfs_csum_file_block(struct btrfs_trans_handle *trans, |
| 1115 | struct btrfs_root *root, |
| 1116 | u64 objectid, u64 offset, |
| 1117 | char *data, size_t len); |
| 1118 | int btrfs_csum_verify_file_block(struct btrfs_root *root, |
| 1119 | u64 objectid, u64 offset, |
| 1120 | char *data, size_t len); |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 1121 | struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, |
| 1122 | struct btrfs_root *root, |
| 1123 | struct btrfs_path *path, |
| 1124 | u64 objectid, u64 offset, |
| 1125 | int cow); |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 1126 | /* super.c */ |
| 1127 | extern struct subsystem btrfs_subsys; |
| 1128 | |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 1129 | #endif |