Chris Mason | 6cbd557 | 2007-06-12 09:07:21 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 Oracle. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public |
| 6 | * License v2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public |
| 14 | * License along with this program; if not, write to the |
| 15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 16 | * Boston, MA 021110-1307, USA. |
| 17 | */ |
| 18 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 19 | #ifndef __BTRFS__ |
| 20 | #define __BTRFS__ |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 21 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 22 | #include <linux/fs.h> |
Chris Mason | d602557 | 2007-03-30 14:27:56 -0400 | [diff] [blame] | 23 | #include <linux/buffer_head.h> |
Chris Mason | 08607c1 | 2007-06-08 15:33:54 -0400 | [diff] [blame] | 24 | #include <linux/workqueue.h> |
Chris Mason | 8ef9762 | 2007-03-26 10:15:30 -0400 | [diff] [blame] | 25 | #include "bit-radix.h" |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 26 | |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 27 | struct btrfs_trans_handle; |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 28 | struct btrfs_transaction; |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 29 | extern struct kmem_cache *btrfs_trans_handle_cachep; |
| 30 | extern struct kmem_cache *btrfs_transaction_cachep; |
| 31 | extern struct kmem_cache *btrfs_bit_radix_cachep; |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 32 | extern struct kmem_cache *btrfs_path_cachep; |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 33 | |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 34 | #define BTRFS_MAGIC "_BtRfS_M" |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 35 | |
Chris Mason | 6407bf6 | 2007-03-27 06:33:00 -0400 | [diff] [blame] | 36 | #define BTRFS_ROOT_TREE_OBJECTID 1ULL |
Chris Mason | 0cf6c62 | 2007-06-09 09:22:25 -0400 | [diff] [blame] | 37 | #define BTRFS_EXTENT_TREE_OBJECTID 2ULL |
| 38 | #define BTRFS_FS_TREE_OBJECTID 3ULL |
| 39 | #define BTRFS_ROOT_TREE_DIR_OBJECTID 4ULL |
| 40 | #define BTRFS_FIRST_FREE_OBJECTID 5ULL |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 41 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 42 | /* |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 43 | * we can actually store much bigger names, but lets not confuse the rest |
| 44 | * of linux |
| 45 | */ |
| 46 | #define BTRFS_NAME_LEN 255 |
| 47 | |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 48 | /* 32 bytes in various csum fields */ |
| 49 | #define BTRFS_CSUM_SIZE 32 |
Chris Mason | 509659c | 2007-05-10 12:36:17 -0400 | [diff] [blame] | 50 | /* four bytes for CRC32 */ |
| 51 | #define BTRFS_CRC32_SIZE 4 |
Chris Mason | e06afa8 | 2007-05-23 15:44:28 -0400 | [diff] [blame] | 52 | #define BTRFS_EMPTY_DIR_SIZE 6 |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 53 | |
Chris Mason | fabb568 | 2007-06-07 22:13:21 -0400 | [diff] [blame] | 54 | #define BTRFS_FT_UNKNOWN 0 |
| 55 | #define BTRFS_FT_REG_FILE 1 |
| 56 | #define BTRFS_FT_DIR 2 |
| 57 | #define BTRFS_FT_CHRDEV 3 |
| 58 | #define BTRFS_FT_BLKDEV 4 |
| 59 | #define BTRFS_FT_FIFO 5 |
| 60 | #define BTRFS_FT_SOCK 6 |
| 61 | #define BTRFS_FT_SYMLINK 7 |
| 62 | #define BTRFS_FT_MAX 8 |
| 63 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 64 | /* |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 65 | * the key defines the order in the tree, and so it also defines (optimal) |
| 66 | * block layout. objectid corresonds to the inode number. The flags |
| 67 | * tells us things about the object, and is a kind of stream selector. |
| 68 | * so for a given inode, keys with flags of 1 might refer to the inode |
| 69 | * data, flags of 2 may point to file data in the btree and flags == 3 |
| 70 | * may point to extents. |
| 71 | * |
| 72 | * offset is the starting byte offset for this key in the stream. |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 73 | * |
| 74 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always |
| 75 | * in cpu native order. Otherwise they are identical and their sizes |
| 76 | * should be the same (ie both packed) |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 77 | */ |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 78 | struct btrfs_disk_key { |
| 79 | __le64 objectid; |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 80 | __le32 flags; |
Chris Mason | 70b2bef | 2007-04-17 15:39:32 -0400 | [diff] [blame] | 81 | __le64 offset; |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 82 | } __attribute__ ((__packed__)); |
| 83 | |
| 84 | struct btrfs_key { |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 85 | u64 objectid; |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 86 | u32 flags; |
Chris Mason | 70b2bef | 2007-04-17 15:39:32 -0400 | [diff] [blame] | 87 | u64 offset; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 88 | } __attribute__ ((__packed__)); |
| 89 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 90 | /* |
| 91 | * every tree block (leaf or node) starts with this header. |
| 92 | */ |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 93 | struct btrfs_header { |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 94 | u8 csum[BTRFS_CSUM_SIZE]; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 95 | u8 fsid[16]; /* FS specific uuid */ |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 96 | __le64 blocknr; /* which block this node is supposed to live in */ |
Chris Mason | 7f5c151 | 2007-03-23 15:56:19 -0400 | [diff] [blame] | 97 | __le64 generation; |
Chris Mason | 4d77567 | 2007-04-20 20:23:12 -0400 | [diff] [blame] | 98 | __le64 owner; |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 99 | __le16 nritems; |
| 100 | __le16 flags; |
Chris Mason | 9a6f11e | 2007-03-27 09:06:38 -0400 | [diff] [blame] | 101 | u8 level; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 102 | } __attribute__ ((__packed__)); |
| 103 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 104 | #define BTRFS_MAX_LEVEL 8 |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 105 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->blocksize - \ |
| 106 | sizeof(struct btrfs_header)) / \ |
| 107 | (sizeof(struct btrfs_disk_key) + sizeof(u64))) |
| 108 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
| 109 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->blocksize)) |
Chris Mason | 236454d | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 110 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
| 111 | sizeof(struct btrfs_item) - \ |
| 112 | sizeof(struct btrfs_file_extent_item)) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 113 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 114 | struct buffer_head; |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 115 | /* |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 116 | * the super block basically lists the main trees of the FS |
| 117 | * it currently lacks any block count etc etc |
| 118 | */ |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 119 | struct btrfs_super_block { |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 120 | u8 csum[BTRFS_CSUM_SIZE]; |
Chris Mason | 87cbda5 | 2007-03-28 19:44:27 -0400 | [diff] [blame] | 121 | /* the first 3 fields must match struct btrfs_header */ |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 122 | u8 fsid[16]; /* FS specific uuid */ |
| 123 | __le64 blocknr; /* this block number */ |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 124 | __le64 magic; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 125 | __le64 generation; |
| 126 | __le64 root; |
| 127 | __le64 total_blocks; |
| 128 | __le64 blocks_used; |
Chris Mason | 2e635a2 | 2007-03-21 11:12:56 -0400 | [diff] [blame] | 129 | __le64 root_dir_objectid; |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame^] | 130 | __le32 blocksize; |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 131 | } __attribute__ ((__packed__)); |
| 132 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 133 | /* |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 134 | * 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] | 135 | * the item in the leaf (relative to the start of the data area) |
| 136 | */ |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 137 | struct btrfs_item { |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 138 | struct btrfs_disk_key key; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 139 | __le32 offset; |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 140 | __le16 size; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 141 | } __attribute__ ((__packed__)); |
| 142 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 143 | /* |
| 144 | * leaves have an item area and a data area: |
| 145 | * [item0, item1....itemN] [free space] [dataN...data1, data0] |
| 146 | * |
| 147 | * The data is separate from the items to get the keys closer together |
| 148 | * during searches. |
| 149 | */ |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 150 | struct btrfs_leaf { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 151 | struct btrfs_header header; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 152 | struct btrfs_item items[]; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 153 | } __attribute__ ((__packed__)); |
| 154 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 155 | /* |
| 156 | * all non-leaf blocks are nodes, they hold only keys and pointers to |
| 157 | * other blocks |
| 158 | */ |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 159 | struct btrfs_key_ptr { |
| 160 | struct btrfs_disk_key key; |
| 161 | __le64 blockptr; |
| 162 | } __attribute__ ((__packed__)); |
| 163 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 164 | struct btrfs_node { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 165 | struct btrfs_header header; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 166 | struct btrfs_key_ptr ptrs[]; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 167 | } __attribute__ ((__packed__)); |
| 168 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 169 | /* |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 170 | * btrfs_paths remember the path taken from the root down to the leaf. |
| 171 | * 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] | 172 | * to any other levels that are present. |
| 173 | * |
| 174 | * The slots array records the index of the item or block pointer |
| 175 | * used while walking the tree. |
| 176 | */ |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 177 | struct btrfs_path { |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 178 | struct buffer_head *nodes[BTRFS_MAX_LEVEL]; |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 179 | int slots[BTRFS_MAX_LEVEL]; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 180 | }; |
Chris Mason | 5de08d7 | 2007-02-24 06:24:44 -0500 | [diff] [blame] | 181 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 182 | /* |
| 183 | * items in the extent btree are used to record the objectid of the |
| 184 | * owner of the block and the number of references |
| 185 | */ |
| 186 | struct btrfs_extent_item { |
| 187 | __le32 refs; |
Chris Mason | 4d77567 | 2007-04-20 20:23:12 -0400 | [diff] [blame] | 188 | __le64 owner; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 189 | } __attribute__ ((__packed__)); |
| 190 | |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 191 | struct btrfs_inode_timespec { |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 192 | __le64 sec; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 193 | __le32 nsec; |
| 194 | } __attribute__ ((__packed__)); |
| 195 | |
| 196 | /* |
| 197 | * there is no padding here on purpose. If you want to extent the inode, |
| 198 | * make a new item type |
| 199 | */ |
| 200 | struct btrfs_inode_item { |
| 201 | __le64 generation; |
| 202 | __le64 size; |
| 203 | __le64 nblocks; |
Chris Mason | 31f3c99 | 2007-04-30 15:25:45 -0400 | [diff] [blame] | 204 | __le64 block_group; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 205 | __le32 nlink; |
| 206 | __le32 uid; |
| 207 | __le32 gid; |
| 208 | __le32 mode; |
| 209 | __le32 rdev; |
| 210 | __le16 flags; |
| 211 | __le16 compat_flags; |
| 212 | struct btrfs_inode_timespec atime; |
| 213 | struct btrfs_inode_timespec ctime; |
| 214 | struct btrfs_inode_timespec mtime; |
| 215 | struct btrfs_inode_timespec otime; |
| 216 | } __attribute__ ((__packed__)); |
| 217 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 218 | struct btrfs_dir_item { |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 219 | struct btrfs_disk_key location; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 220 | __le16 flags; |
Chris Mason | a8a2ee0 | 2007-03-16 08:46:49 -0400 | [diff] [blame] | 221 | __le16 name_len; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 222 | u8 type; |
| 223 | } __attribute__ ((__packed__)); |
| 224 | |
| 225 | struct btrfs_root_item { |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 226 | struct btrfs_inode_item inode; |
| 227 | __le64 root_dirid; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 228 | __le64 blocknr; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 229 | __le64 block_limit; |
| 230 | __le64 blocks_used; |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame^] | 231 | __le32 flags; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 232 | __le32 refs; |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame^] | 233 | struct btrfs_disk_key drop_progress; |
| 234 | u8 drop_level; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 235 | } __attribute__ ((__packed__)); |
| 236 | |
Chris Mason | 236454d | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 237 | #define BTRFS_FILE_EXTENT_REG 0 |
| 238 | #define BTRFS_FILE_EXTENT_INLINE 1 |
| 239 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 240 | struct btrfs_file_extent_item { |
Chris Mason | 71951f3 | 2007-03-27 09:16:29 -0400 | [diff] [blame] | 241 | __le64 generation; |
Chris Mason | 236454d | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 242 | u8 type; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 243 | /* |
| 244 | * disk space consumed by the extent, checksum blocks are included |
| 245 | * in these numbers |
| 246 | */ |
| 247 | __le64 disk_blocknr; |
| 248 | __le64 disk_num_blocks; |
| 249 | /* |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 250 | * the logical offset in file blocks (no csums) |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 251 | * this extent record is for. This allows a file extent to point |
| 252 | * into the middle of an existing extent on disk, sharing it |
| 253 | * between two snapshots (useful if some bytes in the middle of the |
| 254 | * extent have changed |
| 255 | */ |
| 256 | __le64 offset; |
| 257 | /* |
| 258 | * the logical number of file blocks (no csums included) |
| 259 | */ |
| 260 | __le64 num_blocks; |
| 261 | } __attribute__ ((__packed__)); |
| 262 | |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 263 | struct btrfs_csum_item { |
Chris Mason | 509659c | 2007-05-10 12:36:17 -0400 | [diff] [blame] | 264 | u8 csum; |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 265 | } __attribute__ ((__packed__)); |
| 266 | |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 267 | /* tag for the radix tree of block groups in ram */ |
| 268 | #define BTRFS_BLOCK_GROUP_DIRTY 0 |
Chris Mason | 31f3c99 | 2007-04-30 15:25:45 -0400 | [diff] [blame] | 269 | #define BTRFS_BLOCK_GROUP_AVAIL 1 |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 270 | #define BTRFS_BLOCK_GROUP_SIZE (256 * 1024 * 1024) |
Chris Mason | 1e2677e | 2007-05-29 16:52:18 -0400 | [diff] [blame] | 271 | |
| 272 | |
| 273 | #define BTRFS_BLOCK_GROUP_DATA 1 |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 274 | struct btrfs_block_group_item { |
| 275 | __le64 used; |
Chris Mason | 1e2677e | 2007-05-29 16:52:18 -0400 | [diff] [blame] | 276 | u8 flags; |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 277 | } __attribute__ ((__packed__)); |
| 278 | |
| 279 | struct btrfs_block_group_cache { |
| 280 | struct btrfs_key key; |
| 281 | struct btrfs_block_group_item item; |
Chris Mason | 3e1ad54 | 2007-05-07 20:03:49 -0400 | [diff] [blame] | 282 | struct radix_tree_root *radix; |
Chris Mason | cd1bc46 | 2007-04-27 10:08:34 -0400 | [diff] [blame] | 283 | u64 first_free; |
| 284 | u64 last_alloc; |
Chris Mason | be74417 | 2007-05-06 10:15:01 -0400 | [diff] [blame] | 285 | u64 pinned; |
Chris Mason | e37c9e6 | 2007-05-09 20:13:14 -0400 | [diff] [blame] | 286 | u64 last_prealloc; |
Chris Mason | be74417 | 2007-05-06 10:15:01 -0400 | [diff] [blame] | 287 | int data; |
Chris Mason | e37c9e6 | 2007-05-09 20:13:14 -0400 | [diff] [blame] | 288 | int cached; |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 289 | }; |
| 290 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 291 | struct btrfs_fs_info { |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 292 | struct btrfs_root *extent_root; |
| 293 | struct btrfs_root *tree_root; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 294 | struct radix_tree_root fs_roots_radix; |
Chris Mason | 8ef9762 | 2007-03-26 10:15:30 -0400 | [diff] [blame] | 295 | struct radix_tree_root pending_del_radix; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 296 | struct radix_tree_root pinned_radix; |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 297 | struct radix_tree_root block_group_radix; |
Chris Mason | be74417 | 2007-05-06 10:15:01 -0400 | [diff] [blame] | 298 | struct radix_tree_root block_group_data_radix; |
Chris Mason | e37c9e6 | 2007-05-09 20:13:14 -0400 | [diff] [blame] | 299 | struct radix_tree_root extent_map_radix; |
Chris Mason | f2458e1 | 2007-04-25 15:52:25 -0400 | [diff] [blame] | 300 | |
| 301 | u64 extent_tree_insert[BTRFS_MAX_LEVEL * 3]; |
| 302 | int extent_tree_insert_nr; |
| 303 | u64 extent_tree_prealloc[BTRFS_MAX_LEVEL * 3]; |
| 304 | int extent_tree_prealloc_nr; |
| 305 | |
Chris Mason | 293ffd5 | 2007-03-20 15:57:25 -0400 | [diff] [blame] | 306 | u64 generation; |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 307 | struct btrfs_transaction *running_transaction; |
Chris Mason | 1261ec4 | 2007-03-20 20:35:03 -0400 | [diff] [blame] | 308 | struct btrfs_super_block *disk_super; |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 309 | struct buffer_head *sb_buffer; |
| 310 | struct super_block *sb; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 311 | struct inode *btree_inode; |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 312 | struct mutex trans_mutex; |
Chris Mason | d561c02 | 2007-03-23 19:47:49 -0400 | [diff] [blame] | 313 | struct mutex fs_mutex; |
Chris Mason | 8fd1779 | 2007-04-19 21:01:03 -0400 | [diff] [blame] | 314 | struct list_head trans_list; |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 315 | struct list_head dead_roots; |
Chris Mason | 08607c1 | 2007-06-08 15:33:54 -0400 | [diff] [blame] | 316 | struct delayed_work trans_work; |
Chris Mason | e66f709 | 2007-04-20 13:16:02 -0400 | [diff] [blame] | 317 | int do_barriers; |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 318 | int closing; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 319 | }; |
| 320 | |
| 321 | /* |
| 322 | * in ram representation of the tree. extent_root is used for all allocations |
Chris Mason | f2458e1 | 2007-04-25 15:52:25 -0400 | [diff] [blame] | 323 | * and for the extent tree extent_root root. |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 324 | */ |
| 325 | struct btrfs_root { |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 326 | struct buffer_head *node; |
| 327 | struct buffer_head *commit_root; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 328 | struct btrfs_root_item root_item; |
| 329 | struct btrfs_key root_key; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 330 | struct btrfs_fs_info *fs_info; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 331 | struct inode *inode; |
| 332 | u64 objectid; |
| 333 | u64 last_trans; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 334 | u32 blocksize; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 335 | int ref_cows; |
| 336 | u32 type; |
Chris Mason | 1b05da2 | 2007-04-10 12:13:09 -0400 | [diff] [blame] | 337 | u64 highest_inode; |
| 338 | u64 last_inode_alloc; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 339 | }; |
| 340 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 341 | /* the lower bits in the key flags defines the item type */ |
| 342 | #define BTRFS_KEY_TYPE_MAX 256 |
Chris Mason | a429e51 | 2007-04-18 16:15:28 -0400 | [diff] [blame] | 343 | #define BTRFS_KEY_TYPE_SHIFT 24 |
| 344 | #define BTRFS_KEY_TYPE_MASK (((u32)BTRFS_KEY_TYPE_MAX - 1) << \ |
| 345 | BTRFS_KEY_TYPE_SHIFT) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 346 | |
| 347 | /* |
| 348 | * inode items have the data typically returned from stat and store other |
| 349 | * info about object characteristics. There is one for every file and dir in |
| 350 | * the FS |
| 351 | */ |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 352 | #define BTRFS_INODE_ITEM_KEY 1 |
| 353 | |
| 354 | /* reserve 2-15 close to the inode for later flexibility */ |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 355 | |
| 356 | /* |
| 357 | * dir items are the name -> inode pointers in a directory. There is one |
| 358 | * for every name in a directory. |
| 359 | */ |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 360 | #define BTRFS_DIR_ITEM_KEY 16 |
| 361 | #define BTRFS_DIR_INDEX_KEY 17 |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 362 | /* |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 363 | * extent data is for file data |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 364 | */ |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 365 | #define BTRFS_EXTENT_DATA_KEY 18 |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 366 | /* |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 367 | * csum items have the checksums for data in the extents |
| 368 | */ |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 369 | #define BTRFS_CSUM_ITEM_KEY 19 |
| 370 | |
| 371 | /* reserve 20-31 for other file stuff */ |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 372 | |
| 373 | /* |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 374 | * root items point to tree roots. There are typically in the root |
| 375 | * tree used by the super block to find all the other trees |
| 376 | */ |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 377 | #define BTRFS_ROOT_ITEM_KEY 32 |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 378 | /* |
| 379 | * extent items are in the extent map tree. These record which blocks |
| 380 | * are used, and how many references there are to each block |
| 381 | */ |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 382 | #define BTRFS_EXTENT_ITEM_KEY 33 |
| 383 | |
| 384 | /* |
| 385 | * block groups give us hints into the extent allocation trees. Which |
| 386 | * blocks are free etc etc |
| 387 | */ |
| 388 | #define BTRFS_BLOCK_GROUP_ITEM_KEY 34 |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 389 | |
| 390 | /* |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 391 | * string items are for debugging. They just store a short string of |
| 392 | * data in the FS |
| 393 | */ |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 394 | #define BTRFS_STRING_ITEM_KEY 253 |
| 395 | |
| 396 | |
| 397 | static inline u64 btrfs_block_group_used(struct btrfs_block_group_item *bi) |
| 398 | { |
| 399 | return le64_to_cpu(bi->used); |
| 400 | } |
| 401 | |
| 402 | static inline void btrfs_set_block_group_used(struct |
| 403 | btrfs_block_group_item *bi, |
| 404 | u64 val) |
| 405 | { |
| 406 | bi->used = cpu_to_le64(val); |
| 407 | } |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 408 | |
| 409 | static inline u64 btrfs_inode_generation(struct btrfs_inode_item *i) |
| 410 | { |
| 411 | return le64_to_cpu(i->generation); |
| 412 | } |
| 413 | |
| 414 | static inline void btrfs_set_inode_generation(struct btrfs_inode_item *i, |
| 415 | u64 val) |
| 416 | { |
| 417 | i->generation = cpu_to_le64(val); |
| 418 | } |
| 419 | |
| 420 | static inline u64 btrfs_inode_size(struct btrfs_inode_item *i) |
| 421 | { |
| 422 | return le64_to_cpu(i->size); |
| 423 | } |
| 424 | |
| 425 | static inline void btrfs_set_inode_size(struct btrfs_inode_item *i, u64 val) |
| 426 | { |
| 427 | i->size = cpu_to_le64(val); |
| 428 | } |
| 429 | |
| 430 | static inline u64 btrfs_inode_nblocks(struct btrfs_inode_item *i) |
| 431 | { |
| 432 | return le64_to_cpu(i->nblocks); |
| 433 | } |
| 434 | |
| 435 | static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item *i, u64 val) |
| 436 | { |
| 437 | i->nblocks = cpu_to_le64(val); |
| 438 | } |
| 439 | |
Chris Mason | 31f3c99 | 2007-04-30 15:25:45 -0400 | [diff] [blame] | 440 | static inline u64 btrfs_inode_block_group(struct btrfs_inode_item *i) |
| 441 | { |
| 442 | return le64_to_cpu(i->block_group); |
| 443 | } |
| 444 | |
| 445 | static inline void btrfs_set_inode_block_group(struct btrfs_inode_item *i, |
| 446 | u64 val) |
| 447 | { |
| 448 | i->block_group = cpu_to_le64(val); |
| 449 | } |
| 450 | |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 451 | static inline u32 btrfs_inode_nlink(struct btrfs_inode_item *i) |
| 452 | { |
| 453 | return le32_to_cpu(i->nlink); |
| 454 | } |
| 455 | |
| 456 | static inline void btrfs_set_inode_nlink(struct btrfs_inode_item *i, u32 val) |
| 457 | { |
| 458 | i->nlink = cpu_to_le32(val); |
| 459 | } |
| 460 | |
| 461 | static inline u32 btrfs_inode_uid(struct btrfs_inode_item *i) |
| 462 | { |
| 463 | return le32_to_cpu(i->uid); |
| 464 | } |
| 465 | |
| 466 | static inline void btrfs_set_inode_uid(struct btrfs_inode_item *i, u32 val) |
| 467 | { |
| 468 | i->uid = cpu_to_le32(val); |
| 469 | } |
| 470 | |
| 471 | static inline u32 btrfs_inode_gid(struct btrfs_inode_item *i) |
| 472 | { |
| 473 | return le32_to_cpu(i->gid); |
| 474 | } |
| 475 | |
| 476 | static inline void btrfs_set_inode_gid(struct btrfs_inode_item *i, u32 val) |
| 477 | { |
| 478 | i->gid = cpu_to_le32(val); |
| 479 | } |
| 480 | |
| 481 | static inline u32 btrfs_inode_mode(struct btrfs_inode_item *i) |
| 482 | { |
| 483 | return le32_to_cpu(i->mode); |
| 484 | } |
| 485 | |
| 486 | static inline void btrfs_set_inode_mode(struct btrfs_inode_item *i, u32 val) |
| 487 | { |
| 488 | i->mode = cpu_to_le32(val); |
| 489 | } |
| 490 | |
| 491 | static inline u32 btrfs_inode_rdev(struct btrfs_inode_item *i) |
| 492 | { |
| 493 | return le32_to_cpu(i->rdev); |
| 494 | } |
| 495 | |
| 496 | static inline void btrfs_set_inode_rdev(struct btrfs_inode_item *i, u32 val) |
| 497 | { |
| 498 | i->rdev = cpu_to_le32(val); |
| 499 | } |
| 500 | |
| 501 | static inline u16 btrfs_inode_flags(struct btrfs_inode_item *i) |
| 502 | { |
| 503 | return le16_to_cpu(i->flags); |
| 504 | } |
| 505 | |
| 506 | static inline void btrfs_set_inode_flags(struct btrfs_inode_item *i, u16 val) |
| 507 | { |
| 508 | i->flags = cpu_to_le16(val); |
| 509 | } |
| 510 | |
| 511 | static inline u16 btrfs_inode_compat_flags(struct btrfs_inode_item *i) |
| 512 | { |
| 513 | return le16_to_cpu(i->compat_flags); |
| 514 | } |
| 515 | |
| 516 | static inline void btrfs_set_inode_compat_flags(struct btrfs_inode_item *i, |
| 517 | u16 val) |
| 518 | { |
| 519 | i->compat_flags = cpu_to_le16(val); |
| 520 | } |
| 521 | |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 522 | static inline u64 btrfs_timespec_sec(struct btrfs_inode_timespec *ts) |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 523 | { |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 524 | return le64_to_cpu(ts->sec); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 525 | } |
| 526 | |
| 527 | static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec *ts, |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 528 | u64 val) |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 529 | { |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 530 | ts->sec = cpu_to_le64(val); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 531 | } |
| 532 | |
| 533 | static inline u32 btrfs_timespec_nsec(struct btrfs_inode_timespec *ts) |
| 534 | { |
| 535 | return le32_to_cpu(ts->nsec); |
| 536 | } |
| 537 | |
| 538 | static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec *ts, |
| 539 | u32 val) |
| 540 | { |
| 541 | ts->nsec = cpu_to_le32(val); |
| 542 | } |
| 543 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 544 | static inline u32 btrfs_extent_refs(struct btrfs_extent_item *ei) |
Chris Mason | cf27e1e | 2007-03-13 09:49:06 -0400 | [diff] [blame] | 545 | { |
| 546 | return le32_to_cpu(ei->refs); |
| 547 | } |
| 548 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 549 | 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] | 550 | { |
| 551 | ei->refs = cpu_to_le32(val); |
| 552 | } |
| 553 | |
Chris Mason | 4d77567 | 2007-04-20 20:23:12 -0400 | [diff] [blame] | 554 | static inline u64 btrfs_extent_owner(struct btrfs_extent_item *ei) |
| 555 | { |
| 556 | return le64_to_cpu(ei->owner); |
| 557 | } |
| 558 | |
| 559 | static inline void btrfs_set_extent_owner(struct btrfs_extent_item *ei, u64 val) |
| 560 | { |
| 561 | ei->owner = cpu_to_le64(val); |
| 562 | } |
| 563 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 564 | static inline u64 btrfs_node_blockptr(struct btrfs_node *n, int nr) |
Chris Mason | 1d4f8a0 | 2007-03-13 09:28:32 -0400 | [diff] [blame] | 565 | { |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 566 | return le64_to_cpu(n->ptrs[nr].blockptr); |
Chris Mason | 1d4f8a0 | 2007-03-13 09:28:32 -0400 | [diff] [blame] | 567 | } |
| 568 | |
Chris Mason | 4d77567 | 2007-04-20 20:23:12 -0400 | [diff] [blame] | 569 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 570 | static inline void btrfs_set_node_blockptr(struct btrfs_node *n, int nr, |
| 571 | u64 val) |
Chris Mason | 1d4f8a0 | 2007-03-13 09:28:32 -0400 | [diff] [blame] | 572 | { |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 573 | n->ptrs[nr].blockptr = cpu_to_le64(val); |
Chris Mason | 1d4f8a0 | 2007-03-13 09:28:32 -0400 | [diff] [blame] | 574 | } |
| 575 | |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 576 | static inline u32 btrfs_item_offset(struct btrfs_item *item) |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 577 | { |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 578 | return le32_to_cpu(item->offset); |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 579 | } |
| 580 | |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 581 | 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] | 582 | { |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 583 | item->offset = cpu_to_le32(val); |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 584 | } |
| 585 | |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 586 | static inline u32 btrfs_item_end(struct btrfs_item *item) |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 587 | { |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 588 | return le32_to_cpu(item->offset) + le16_to_cpu(item->size); |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 589 | } |
| 590 | |
| 591 | static inline u16 btrfs_item_size(struct btrfs_item *item) |
| 592 | { |
| 593 | return le16_to_cpu(item->size); |
| 594 | } |
| 595 | |
| 596 | static inline void btrfs_set_item_size(struct btrfs_item *item, u16 val) |
| 597 | { |
| 598 | item->size = cpu_to_le16(val); |
| 599 | } |
| 600 | |
Chris Mason | 1d4f640 | 2007-03-15 15:18:43 -0400 | [diff] [blame] | 601 | static inline u16 btrfs_dir_flags(struct btrfs_dir_item *d) |
| 602 | { |
| 603 | return le16_to_cpu(d->flags); |
| 604 | } |
| 605 | |
| 606 | static inline void btrfs_set_dir_flags(struct btrfs_dir_item *d, u16 val) |
| 607 | { |
| 608 | d->flags = cpu_to_le16(val); |
| 609 | } |
| 610 | |
| 611 | static inline u8 btrfs_dir_type(struct btrfs_dir_item *d) |
| 612 | { |
| 613 | return d->type; |
| 614 | } |
| 615 | |
| 616 | static inline void btrfs_set_dir_type(struct btrfs_dir_item *d, u8 val) |
| 617 | { |
| 618 | d->type = val; |
| 619 | } |
| 620 | |
Chris Mason | a8a2ee0 | 2007-03-16 08:46:49 -0400 | [diff] [blame] | 621 | static inline u16 btrfs_dir_name_len(struct btrfs_dir_item *d) |
Chris Mason | 1d4f640 | 2007-03-15 15:18:43 -0400 | [diff] [blame] | 622 | { |
Chris Mason | a8a2ee0 | 2007-03-16 08:46:49 -0400 | [diff] [blame] | 623 | return le16_to_cpu(d->name_len); |
| 624 | } |
| 625 | |
| 626 | static inline void btrfs_set_dir_name_len(struct btrfs_dir_item *d, u16 val) |
| 627 | { |
| 628 | d->name_len = cpu_to_le16(val); |
Chris Mason | 1d4f640 | 2007-03-15 15:18:43 -0400 | [diff] [blame] | 629 | } |
| 630 | |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 631 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
| 632 | struct btrfs_disk_key *disk) |
| 633 | { |
| 634 | cpu->offset = le64_to_cpu(disk->offset); |
| 635 | cpu->flags = le32_to_cpu(disk->flags); |
| 636 | cpu->objectid = le64_to_cpu(disk->objectid); |
| 637 | } |
| 638 | |
| 639 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, |
| 640 | struct btrfs_key *cpu) |
| 641 | { |
| 642 | disk->offset = cpu_to_le64(cpu->offset); |
| 643 | disk->flags = cpu_to_le32(cpu->flags); |
| 644 | disk->objectid = cpu_to_le64(cpu->objectid); |
| 645 | } |
| 646 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 647 | static inline u64 btrfs_disk_key_objectid(struct btrfs_disk_key *disk) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 648 | { |
| 649 | return le64_to_cpu(disk->objectid); |
| 650 | } |
| 651 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 652 | static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key *disk, |
| 653 | u64 val) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 654 | { |
| 655 | disk->objectid = cpu_to_le64(val); |
| 656 | } |
| 657 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 658 | static inline u64 btrfs_disk_key_offset(struct btrfs_disk_key *disk) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 659 | { |
| 660 | return le64_to_cpu(disk->offset); |
| 661 | } |
| 662 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 663 | static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key *disk, |
| 664 | u64 val) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 665 | { |
| 666 | disk->offset = cpu_to_le64(val); |
| 667 | } |
| 668 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 669 | static inline u32 btrfs_disk_key_flags(struct btrfs_disk_key *disk) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 670 | { |
| 671 | return le32_to_cpu(disk->flags); |
| 672 | } |
| 673 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 674 | static inline void btrfs_set_disk_key_flags(struct btrfs_disk_key *disk, |
| 675 | u32 val) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 676 | { |
| 677 | disk->flags = cpu_to_le32(val); |
| 678 | } |
| 679 | |
Chris Mason | a429e51 | 2007-04-18 16:15:28 -0400 | [diff] [blame] | 680 | static inline u32 btrfs_disk_key_type(struct btrfs_disk_key *key) |
| 681 | { |
| 682 | return le32_to_cpu(key->flags) >> BTRFS_KEY_TYPE_SHIFT; |
| 683 | } |
| 684 | |
| 685 | static inline void btrfs_set_disk_key_type(struct btrfs_disk_key *key, |
| 686 | u32 val) |
| 687 | { |
| 688 | u32 flags = btrfs_disk_key_flags(key); |
| 689 | BUG_ON(val >= BTRFS_KEY_TYPE_MAX); |
| 690 | val = val << BTRFS_KEY_TYPE_SHIFT; |
| 691 | flags = (flags & ~BTRFS_KEY_TYPE_MASK) | val; |
| 692 | btrfs_set_disk_key_flags(key, flags); |
| 693 | } |
| 694 | |
| 695 | static inline u32 btrfs_key_type(struct btrfs_key *key) |
| 696 | { |
| 697 | return key->flags >> BTRFS_KEY_TYPE_SHIFT; |
| 698 | } |
| 699 | |
| 700 | static inline void btrfs_set_key_type(struct btrfs_key *key, u32 val) |
| 701 | { |
| 702 | BUG_ON(val >= BTRFS_KEY_TYPE_MAX); |
| 703 | val = val << BTRFS_KEY_TYPE_SHIFT; |
| 704 | key->flags = (key->flags & ~(BTRFS_KEY_TYPE_MASK)) | val; |
| 705 | } |
| 706 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 707 | static inline u64 btrfs_header_blocknr(struct btrfs_header *h) |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 708 | { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 709 | return le64_to_cpu(h->blocknr); |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 710 | } |
| 711 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 712 | 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] | 713 | { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 714 | h->blocknr = cpu_to_le64(blocknr); |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 715 | } |
| 716 | |
Chris Mason | 7f5c151 | 2007-03-23 15:56:19 -0400 | [diff] [blame] | 717 | static inline u64 btrfs_header_generation(struct btrfs_header *h) |
| 718 | { |
| 719 | return le64_to_cpu(h->generation); |
| 720 | } |
| 721 | |
| 722 | static inline void btrfs_set_header_generation(struct btrfs_header *h, |
| 723 | u64 val) |
| 724 | { |
| 725 | h->generation = cpu_to_le64(val); |
| 726 | } |
| 727 | |
Chris Mason | 4d77567 | 2007-04-20 20:23:12 -0400 | [diff] [blame] | 728 | static inline u64 btrfs_header_owner(struct btrfs_header *h) |
| 729 | { |
| 730 | return le64_to_cpu(h->owner); |
| 731 | } |
| 732 | |
| 733 | static inline void btrfs_set_header_owner(struct btrfs_header *h, |
| 734 | u64 val) |
| 735 | { |
| 736 | h->owner = cpu_to_le64(val); |
| 737 | } |
| 738 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 739 | static inline u16 btrfs_header_nritems(struct btrfs_header *h) |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 740 | { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 741 | return le16_to_cpu(h->nritems); |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 742 | } |
| 743 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 744 | 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] | 745 | { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 746 | h->nritems = cpu_to_le16(val); |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 747 | } |
| 748 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 749 | static inline u16 btrfs_header_flags(struct btrfs_header *h) |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 750 | { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 751 | return le16_to_cpu(h->flags); |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 752 | } |
| 753 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 754 | 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] | 755 | { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 756 | h->flags = cpu_to_le16(val); |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 757 | } |
| 758 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 759 | static inline int btrfs_header_level(struct btrfs_header *h) |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 760 | { |
Chris Mason | 9a6f11e | 2007-03-27 09:06:38 -0400 | [diff] [blame] | 761 | return h->level; |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 762 | } |
| 763 | |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 764 | 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] | 765 | { |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 766 | BUG_ON(level > BTRFS_MAX_LEVEL); |
Chris Mason | 9a6f11e | 2007-03-27 09:06:38 -0400 | [diff] [blame] | 767 | h->level = level; |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 768 | } |
| 769 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 770 | static inline int btrfs_is_leaf(struct btrfs_node *n) |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 771 | { |
| 772 | return (btrfs_header_level(&n->header) == 0); |
| 773 | } |
| 774 | |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 775 | static inline u64 btrfs_root_blocknr(struct btrfs_root_item *item) |
| 776 | { |
| 777 | return le64_to_cpu(item->blocknr); |
| 778 | } |
| 779 | |
| 780 | static inline void btrfs_set_root_blocknr(struct btrfs_root_item *item, u64 val) |
| 781 | { |
| 782 | item->blocknr = cpu_to_le64(val); |
| 783 | } |
| 784 | |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 785 | static inline u64 btrfs_root_dirid(struct btrfs_root_item *item) |
| 786 | { |
| 787 | return le64_to_cpu(item->root_dirid); |
| 788 | } |
| 789 | |
| 790 | static inline void btrfs_set_root_dirid(struct btrfs_root_item *item, u64 val) |
| 791 | { |
| 792 | item->root_dirid = cpu_to_le64(val); |
| 793 | } |
| 794 | |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 795 | static inline u32 btrfs_root_refs(struct btrfs_root_item *item) |
| 796 | { |
| 797 | return le32_to_cpu(item->refs); |
| 798 | } |
| 799 | |
| 800 | static inline void btrfs_set_root_refs(struct btrfs_root_item *item, u32 val) |
| 801 | { |
| 802 | item->refs = cpu_to_le32(val); |
| 803 | } |
| 804 | |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame^] | 805 | static inline u32 btrfs_root_flags(struct btrfs_root_item *item) |
| 806 | { |
| 807 | return le32_to_cpu(item->flags); |
| 808 | } |
| 809 | |
| 810 | static inline void btrfs_set_root_flags(struct btrfs_root_item *item, u32 val) |
| 811 | { |
| 812 | item->flags = cpu_to_le32(val); |
| 813 | } |
| 814 | |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 815 | static inline u64 btrfs_super_blocknr(struct btrfs_super_block *s) |
| 816 | { |
| 817 | return le64_to_cpu(s->blocknr); |
| 818 | } |
| 819 | |
| 820 | static inline void btrfs_set_super_blocknr(struct btrfs_super_block *s, u64 val) |
| 821 | { |
| 822 | s->blocknr = cpu_to_le64(val); |
| 823 | } |
| 824 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 825 | static inline u64 btrfs_super_generation(struct btrfs_super_block *s) |
| 826 | { |
| 827 | return le64_to_cpu(s->generation); |
| 828 | } |
| 829 | |
| 830 | static inline void btrfs_set_super_generation(struct btrfs_super_block *s, |
| 831 | u64 val) |
| 832 | { |
| 833 | s->generation = cpu_to_le64(val); |
| 834 | } |
| 835 | |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 836 | static inline u64 btrfs_super_root(struct btrfs_super_block *s) |
| 837 | { |
| 838 | return le64_to_cpu(s->root); |
| 839 | } |
| 840 | |
| 841 | static inline void btrfs_set_super_root(struct btrfs_super_block *s, u64 val) |
| 842 | { |
| 843 | s->root = cpu_to_le64(val); |
| 844 | } |
| 845 | |
| 846 | static inline u64 btrfs_super_total_blocks(struct btrfs_super_block *s) |
| 847 | { |
| 848 | return le64_to_cpu(s->total_blocks); |
| 849 | } |
| 850 | |
| 851 | static inline void btrfs_set_super_total_blocks(struct btrfs_super_block *s, |
| 852 | u64 val) |
| 853 | { |
| 854 | s->total_blocks = cpu_to_le64(val); |
| 855 | } |
| 856 | |
| 857 | static inline u64 btrfs_super_blocks_used(struct btrfs_super_block *s) |
| 858 | { |
| 859 | return le64_to_cpu(s->blocks_used); |
| 860 | } |
| 861 | |
| 862 | static inline void btrfs_set_super_blocks_used(struct btrfs_super_block *s, |
| 863 | u64 val) |
| 864 | { |
| 865 | s->blocks_used = cpu_to_le64(val); |
| 866 | } |
| 867 | |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 868 | static inline u32 btrfs_super_blocksize(struct btrfs_super_block *s) |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 869 | { |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 870 | return le32_to_cpu(s->blocksize); |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 871 | } |
| 872 | |
| 873 | static inline void btrfs_set_super_blocksize(struct btrfs_super_block *s, |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 874 | u32 val) |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 875 | { |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 876 | s->blocksize = cpu_to_le32(val); |
| 877 | } |
| 878 | |
Chris Mason | 2e635a2 | 2007-03-21 11:12:56 -0400 | [diff] [blame] | 879 | static inline u64 btrfs_super_root_dir(struct btrfs_super_block *s) |
| 880 | { |
| 881 | return le64_to_cpu(s->root_dir_objectid); |
| 882 | } |
| 883 | |
| 884 | static inline void btrfs_set_super_root_dir(struct btrfs_super_block *s, u64 |
| 885 | val) |
| 886 | { |
| 887 | s->root_dir_objectid = cpu_to_le64(val); |
| 888 | } |
| 889 | |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 890 | static inline u8 *btrfs_leaf_data(struct btrfs_leaf *l) |
| 891 | { |
| 892 | return (u8 *)l->items; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 893 | } |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 894 | |
Chris Mason | 236454d | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 895 | static inline int btrfs_file_extent_type(struct btrfs_file_extent_item *e) |
| 896 | { |
| 897 | return e->type; |
| 898 | } |
| 899 | static inline void btrfs_set_file_extent_type(struct btrfs_file_extent_item *e, |
| 900 | u8 val) |
| 901 | { |
| 902 | e->type = val; |
| 903 | } |
| 904 | |
| 905 | static inline char *btrfs_file_extent_inline_start(struct |
| 906 | btrfs_file_extent_item *e) |
| 907 | { |
| 908 | return (char *)(&e->disk_blocknr); |
| 909 | } |
| 910 | |
| 911 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) |
| 912 | { |
| 913 | return (unsigned long)(&((struct |
| 914 | btrfs_file_extent_item *)NULL)->disk_blocknr) + datasize; |
| 915 | } |
| 916 | |
| 917 | static inline u32 btrfs_file_extent_inline_len(struct btrfs_item *e) |
| 918 | { |
| 919 | struct btrfs_file_extent_item *fe = NULL; |
| 920 | return btrfs_item_size(e) - (unsigned long)(&fe->disk_blocknr); |
| 921 | } |
| 922 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 923 | static inline u64 btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item |
| 924 | *e) |
| 925 | { |
| 926 | return le64_to_cpu(e->disk_blocknr); |
| 927 | } |
| 928 | |
| 929 | static inline void btrfs_set_file_extent_disk_blocknr(struct |
| 930 | btrfs_file_extent_item |
| 931 | *e, u64 val) |
| 932 | { |
| 933 | e->disk_blocknr = cpu_to_le64(val); |
| 934 | } |
| 935 | |
Chris Mason | 71951f3 | 2007-03-27 09:16:29 -0400 | [diff] [blame] | 936 | static inline u64 btrfs_file_extent_generation(struct btrfs_file_extent_item *e) |
| 937 | { |
| 938 | return le64_to_cpu(e->generation); |
| 939 | } |
| 940 | |
| 941 | static inline void btrfs_set_file_extent_generation(struct |
| 942 | btrfs_file_extent_item *e, |
| 943 | u64 val) |
| 944 | { |
| 945 | e->generation = cpu_to_le64(val); |
| 946 | } |
| 947 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 948 | static inline u64 btrfs_file_extent_disk_num_blocks(struct |
| 949 | btrfs_file_extent_item *e) |
| 950 | { |
| 951 | return le64_to_cpu(e->disk_num_blocks); |
| 952 | } |
| 953 | |
| 954 | static inline void btrfs_set_file_extent_disk_num_blocks(struct |
| 955 | btrfs_file_extent_item |
| 956 | *e, u64 val) |
| 957 | { |
| 958 | e->disk_num_blocks = cpu_to_le64(val); |
| 959 | } |
| 960 | |
| 961 | static inline u64 btrfs_file_extent_offset(struct btrfs_file_extent_item *e) |
| 962 | { |
| 963 | return le64_to_cpu(e->offset); |
| 964 | } |
| 965 | |
| 966 | static inline void btrfs_set_file_extent_offset(struct btrfs_file_extent_item |
| 967 | *e, u64 val) |
| 968 | { |
| 969 | e->offset = cpu_to_le64(val); |
| 970 | } |
| 971 | |
| 972 | static inline u64 btrfs_file_extent_num_blocks(struct btrfs_file_extent_item |
| 973 | *e) |
| 974 | { |
| 975 | return le64_to_cpu(e->num_blocks); |
| 976 | } |
| 977 | |
| 978 | static inline void btrfs_set_file_extent_num_blocks(struct |
| 979 | btrfs_file_extent_item *e, |
| 980 | u64 val) |
| 981 | { |
| 982 | e->num_blocks = cpu_to_le64(val); |
| 983 | } |
| 984 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 985 | static inline struct btrfs_root *btrfs_sb(struct super_block *sb) |
| 986 | { |
| 987 | return sb->s_fs_info; |
| 988 | } |
| 989 | |
Chris Mason | d602557 | 2007-03-30 14:27:56 -0400 | [diff] [blame] | 990 | static inline void btrfs_check_bounds(void *vptr, size_t len, |
| 991 | void *vcontainer, size_t container_len) |
| 992 | { |
| 993 | char *ptr = vptr; |
| 994 | char *container = vcontainer; |
| 995 | WARN_ON(ptr < container); |
| 996 | WARN_ON(ptr + len > container + container_len); |
| 997 | } |
| 998 | |
| 999 | static inline void btrfs_memcpy(struct btrfs_root *root, |
| 1000 | void *dst_block, |
| 1001 | void *dst, const void *src, size_t nr) |
| 1002 | { |
| 1003 | btrfs_check_bounds(dst, nr, dst_block, root->fs_info->sb->s_blocksize); |
| 1004 | memcpy(dst, src, nr); |
| 1005 | } |
| 1006 | |
| 1007 | static inline void btrfs_memmove(struct btrfs_root *root, |
| 1008 | void *dst_block, |
| 1009 | void *dst, void *src, size_t nr) |
| 1010 | { |
| 1011 | btrfs_check_bounds(dst, nr, dst_block, root->fs_info->sb->s_blocksize); |
| 1012 | memmove(dst, src, nr); |
| 1013 | } |
| 1014 | |
| 1015 | static inline void btrfs_mark_buffer_dirty(struct buffer_head *bh) |
| 1016 | { |
| 1017 | WARN_ON(!atomic_read(&bh->b_count)); |
| 1018 | mark_buffer_dirty(bh); |
| 1019 | } |
| 1020 | |
Chris Mason | 4beb1b8 | 2007-03-14 10:31:29 -0400 | [diff] [blame] | 1021 | /* helper function to cast into the data area of the leaf. */ |
| 1022 | #define btrfs_item_ptr(leaf, slot, type) \ |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 1023 | ((type *)(btrfs_leaf_data(leaf) + \ |
| 1024 | btrfs_item_offset((leaf)->items + (slot)))) |
Chris Mason | 4beb1b8 | 2007-03-14 10:31:29 -0400 | [diff] [blame] | 1025 | |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 1026 | /* extent-tree.c */ |
Chris Mason | 5276aed | 2007-06-11 21:33:38 -0400 | [diff] [blame] | 1027 | struct btrfs_block_group_cache *btrfs_lookup_block_group(struct |
| 1028 | btrfs_fs_info *info, |
| 1029 | u64 blocknr); |
Chris Mason | 31f3c99 | 2007-04-30 15:25:45 -0400 | [diff] [blame] | 1030 | struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root, |
| 1031 | struct btrfs_block_group_cache |
Chris Mason | be74417 | 2007-05-06 10:15:01 -0400 | [diff] [blame] | 1032 | *hint, u64 search_start, |
Chris Mason | de428b6 | 2007-05-18 13:28:27 -0400 | [diff] [blame] | 1033 | int data, int owner); |
Chris Mason | c5739bb | 2007-04-10 09:27:04 -0400 | [diff] [blame] | 1034 | int btrfs_inc_root_ref(struct btrfs_trans_handle *trans, |
| 1035 | struct btrfs_root *root); |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1036 | struct buffer_head *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
Chris Mason | 31f3c99 | 2007-04-30 15:25:45 -0400 | [diff] [blame] | 1037 | struct btrfs_root *root, u64 hint); |
Chris Mason | 4d77567 | 2007-04-20 20:23:12 -0400 | [diff] [blame] | 1038 | int btrfs_alloc_extent(struct btrfs_trans_handle *trans, |
| 1039 | struct btrfs_root *root, u64 owner, |
Chris Mason | c62a192 | 2007-04-24 12:07:39 -0400 | [diff] [blame] | 1040 | u64 num_blocks, u64 search_start, |
Chris Mason | be08c1b | 2007-05-03 09:06:49 -0400 | [diff] [blame] | 1041 | u64 search_end, struct btrfs_key *ins, int data); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1042 | 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] | 1043 | struct buffer_head *buf); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1044 | int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1045 | *root, u64 blocknr, u64 num_blocks, int pin); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1046 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, struct |
| 1047 | btrfs_root *root); |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 1048 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
| 1049 | struct btrfs_root *root, |
| 1050 | u64 blocknr, u64 num_blocks); |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 1051 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, |
| 1052 | struct btrfs_root *root); |
| 1053 | int btrfs_free_block_groups(struct btrfs_fs_info *info); |
| 1054 | int btrfs_read_block_groups(struct btrfs_root *root); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1055 | /* ctree.c */ |
Chris Mason | 6567e83 | 2007-04-16 09:22:45 -0400 | [diff] [blame] | 1056 | int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1057 | *root, struct btrfs_path *path, u32 data_size); |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 1058 | int btrfs_truncate_item(struct btrfs_trans_handle *trans, |
| 1059 | struct btrfs_root *root, |
| 1060 | struct btrfs_path *path, |
| 1061 | u32 new_size); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1062 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1063 | *root, struct btrfs_key *key, struct btrfs_path *p, int |
| 1064 | ins_len, int cow); |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 1065 | void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 1066 | struct btrfs_path *btrfs_alloc_path(void); |
| 1067 | void btrfs_free_path(struct btrfs_path *p); |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 1068 | void btrfs_init_path(struct btrfs_path *p); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1069 | int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 1070 | struct btrfs_path *path); |
| 1071 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1072 | *root, struct btrfs_key *key, void *data, u32 data_size); |
| 1073 | int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1074 | *root, struct btrfs_path *path, struct btrfs_key |
| 1075 | *cpu_key, u32 data_size); |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 1076 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 1077 | 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] | 1078 | int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1079 | *root, struct buffer_head *snap); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1080 | /* root-item.c */ |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1081 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 1082 | struct btrfs_key *key); |
| 1083 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1084 | *root, struct btrfs_key *key, struct btrfs_root_item |
| 1085 | *item); |
| 1086 | int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1087 | *root, struct btrfs_key *key, struct btrfs_root_item |
| 1088 | *item); |
| 1089 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct |
| 1090 | btrfs_root_item *item, struct btrfs_key *key); |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame^] | 1091 | int btrfs_find_dead_roots(struct btrfs_root *root); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1092 | /* dir-item.c */ |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1093 | 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] | 1094 | *root, const char *name, int name_len, u64 dir, |
| 1095 | struct btrfs_key *location, u8 type); |
Chris Mason | 7e38180 | 2007-04-19 15:36:27 -0400 | [diff] [blame] | 1096 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
| 1097 | struct btrfs_root *root, |
| 1098 | struct btrfs_path *path, u64 dir, |
| 1099 | const char *name, int name_len, |
| 1100 | int mod); |
| 1101 | struct btrfs_dir_item * |
| 1102 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, |
| 1103 | struct btrfs_root *root, |
| 1104 | struct btrfs_path *path, u64 dir, |
| 1105 | u64 objectid, const char *name, int name_len, |
| 1106 | int mod); |
| 1107 | struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, |
| 1108 | struct btrfs_path *path, |
Chris Mason | 7f5c151 | 2007-03-23 15:56:19 -0400 | [diff] [blame] | 1109 | const char *name, int name_len); |
Chris Mason | 7e38180 | 2007-04-19 15:36:27 -0400 | [diff] [blame] | 1110 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
| 1111 | struct btrfs_root *root, |
| 1112 | struct btrfs_path *path, |
| 1113 | struct btrfs_dir_item *di); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1114 | /* inode-map.c */ |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 1115 | int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, |
| 1116 | struct btrfs_root *fs_root, |
| 1117 | u64 dirid, u64 *objectid); |
Chris Mason | 5be6f7f | 2007-04-05 13:35:25 -0400 | [diff] [blame] | 1118 | int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); |
| 1119 | |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1120 | /* inode-item.c */ |
Chris Mason | 293ffd5 | 2007-03-20 15:57:25 -0400 | [diff] [blame] | 1121 | int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1122 | *root, u64 objectid, struct btrfs_inode_item |
| 1123 | *inode_item); |
| 1124 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 1125 | *root, struct btrfs_path *path, |
| 1126 | struct btrfs_key *location, int mod); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1127 | |
| 1128 | /* file-item.c */ |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 1129 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1130 | struct btrfs_root *root, |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 1131 | u64 objectid, u64 pos, u64 offset, |
Chris Mason | 3a68637 | 2007-05-24 13:35:57 -0400 | [diff] [blame] | 1132 | u64 disk_num_blocks, |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 1133 | u64 num_blocks); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1134 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
| 1135 | struct btrfs_root *root, |
| 1136 | struct btrfs_path *path, u64 objectid, |
Chris Mason | 9773a78 | 2007-03-27 11:26:26 -0400 | [diff] [blame] | 1137 | u64 blocknr, int mod); |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 1138 | int btrfs_csum_file_block(struct btrfs_trans_handle *trans, |
| 1139 | struct btrfs_root *root, |
| 1140 | u64 objectid, u64 offset, |
| 1141 | char *data, size_t len); |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 1142 | struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, |
| 1143 | struct btrfs_root *root, |
| 1144 | struct btrfs_path *path, |
| 1145 | u64 objectid, u64 offset, |
| 1146 | int cow); |
Chris Mason | 1de037a | 2007-05-29 15:17:08 -0400 | [diff] [blame] | 1147 | int btrfs_csum_truncate(struct btrfs_trans_handle *trans, |
| 1148 | struct btrfs_root *root, struct btrfs_path *path, |
| 1149 | u64 isize); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1150 | /* inode.c */ |
Chris Mason | 9ebefb18 | 2007-06-15 13:50:00 -0400 | [diff] [blame] | 1151 | int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page); |
| 1152 | int btrfs_readpage(struct file *file, struct page *page); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1153 | void btrfs_delete_inode(struct inode *inode); |
| 1154 | void btrfs_read_locked_inode(struct inode *inode); |
| 1155 | int btrfs_write_inode(struct inode *inode, int wait); |
| 1156 | void btrfs_dirty_inode(struct inode *inode); |
| 1157 | struct inode *btrfs_alloc_inode(struct super_block *sb); |
| 1158 | void btrfs_destroy_inode(struct inode *inode); |
| 1159 | int btrfs_init_cachep(void); |
| 1160 | void btrfs_destroy_cachep(void); |
| 1161 | int btrfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, |
| 1162 | unsigned long arg); |
| 1163 | long btrfs_compat_ioctl(struct file *file, unsigned int cmd, |
| 1164 | unsigned long arg); |
| 1165 | struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid, |
| 1166 | struct btrfs_root *root); |
| 1167 | int btrfs_commit_write(struct file *file, struct page *page, |
| 1168 | unsigned from, unsigned to); |
| 1169 | int btrfs_get_block(struct inode *inode, sector_t iblock, |
| 1170 | struct buffer_head *result, int create); |
| 1171 | /* file.c */ |
| 1172 | extern struct file_operations btrfs_file_operations; |
| 1173 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, |
| 1174 | struct btrfs_root *root, struct inode *inode, |
| 1175 | u64 start, u64 end, u64 *hint_block); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 1176 | #endif |