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 | dc17ff8 | 2008-01-08 15:46:30 -0500 | [diff] [blame] | 19 | #ifndef __BTRFS_CTREE__ |
| 20 | #define __BTRFS_CTREE__ |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 21 | |
Chris Mason | 6da6aba | 2007-12-18 16:15:09 -0500 | [diff] [blame] | 22 | #include <linux/version.h> |
Chris Mason | 810191f | 2007-10-15 16:18:55 -0400 | [diff] [blame] | 23 | #include <linux/mm.h> |
| 24 | #include <linux/highmem.h> |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 25 | #include <linux/fs.h> |
Chris Mason | 08607c1 | 2007-06-08 15:33:54 -0400 | [diff] [blame] | 26 | #include <linux/workqueue.h> |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 27 | #include <linux/completion.h> |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 28 | #include <linux/backing-dev.h> |
Chris Mason | 479965d | 2007-10-15 16:14:27 -0400 | [diff] [blame] | 29 | #include <asm/kmap_types.h> |
Chris Mason | 8ef9762 | 2007-03-26 10:15:30 -0400 | [diff] [blame] | 30 | #include "bit-radix.h" |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 31 | #include "extent_io.h" |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 32 | #include "extent_map.h" |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 33 | |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 34 | struct btrfs_trans_handle; |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 35 | struct btrfs_transaction; |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 36 | extern struct kmem_cache *btrfs_trans_handle_cachep; |
| 37 | extern struct kmem_cache *btrfs_transaction_cachep; |
| 38 | extern struct kmem_cache *btrfs_bit_radix_cachep; |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 39 | extern struct kmem_cache *btrfs_path_cachep; |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 40 | |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 41 | #define BTRFS_MAGIC "_B5RfS_M" |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 42 | |
Chris Mason | f6dbff5 | 2007-12-13 11:13:32 -0500 | [diff] [blame] | 43 | #define BTRFS_MAX_LEVEL 8 |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 44 | |
| 45 | /* holds pointers to all of the tree roots */ |
Chris Mason | 6407bf6 | 2007-03-27 06:33:00 -0400 | [diff] [blame] | 46 | #define BTRFS_ROOT_TREE_OBJECTID 1ULL |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 47 | |
| 48 | /* stores information about which extents are in use, and reference counts */ |
Chris Mason | 0cf6c62 | 2007-06-09 09:22:25 -0400 | [diff] [blame] | 49 | #define BTRFS_EXTENT_TREE_OBJECTID 2ULL |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 50 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 51 | /* |
| 52 | * chunk tree stores translations from logical -> physical block numbering |
| 53 | * the super block points to the chunk tree |
| 54 | */ |
Chris Mason | e085def | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 55 | #define BTRFS_CHUNK_TREE_OBJECTID 3ULL |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 56 | |
| 57 | /* |
| 58 | * stores information about which areas of a given device are in use. |
| 59 | * one per device. The tree of tree roots points to the device tree |
| 60 | */ |
Chris Mason | e085def | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 61 | #define BTRFS_DEV_TREE_OBJECTID 4ULL |
| 62 | |
| 63 | /* one per subvolume, storing files and directories */ |
| 64 | #define BTRFS_FS_TREE_OBJECTID 5ULL |
| 65 | |
| 66 | /* directory objectid inside the root tree */ |
| 67 | #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 68 | |
| 69 | /* |
| 70 | * All files have objectids higher than this. |
| 71 | */ |
Chris Mason | f6dbff5 | 2007-12-13 11:13:32 -0500 | [diff] [blame] | 72 | #define BTRFS_FIRST_FREE_OBJECTID 256ULL |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 73 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 74 | |
| 75 | /* |
| 76 | * the device items go into the chunk tree. The key is in the form |
| 77 | * [ 1 BTRFS_DEV_ITEM_KEY device_id ] |
| 78 | */ |
| 79 | #define BTRFS_DEV_ITEMS_OBJECTID 1ULL |
| 80 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 81 | /* |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 82 | * we can actually store much bigger names, but lets not confuse the rest |
| 83 | * of linux |
| 84 | */ |
| 85 | #define BTRFS_NAME_LEN 255 |
| 86 | |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 87 | /* 32 bytes in various csum fields */ |
| 88 | #define BTRFS_CSUM_SIZE 32 |
Chris Mason | 509659c | 2007-05-10 12:36:17 -0400 | [diff] [blame] | 89 | /* four bytes for CRC32 */ |
| 90 | #define BTRFS_CRC32_SIZE 4 |
Chris Mason | 3954401 | 2007-12-12 14:38:19 -0500 | [diff] [blame] | 91 | #define BTRFS_EMPTY_DIR_SIZE 0 |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 92 | |
Chris Mason | fabb568 | 2007-06-07 22:13:21 -0400 | [diff] [blame] | 93 | #define BTRFS_FT_UNKNOWN 0 |
| 94 | #define BTRFS_FT_REG_FILE 1 |
| 95 | #define BTRFS_FT_DIR 2 |
| 96 | #define BTRFS_FT_CHRDEV 3 |
| 97 | #define BTRFS_FT_BLKDEV 4 |
| 98 | #define BTRFS_FT_FIFO 5 |
| 99 | #define BTRFS_FT_SOCK 6 |
| 100 | #define BTRFS_FT_SYMLINK 7 |
Josef Bacik | 5103e94 | 2007-11-16 11:45:54 -0500 | [diff] [blame] | 101 | #define BTRFS_FT_XATTR 8 |
| 102 | #define BTRFS_FT_MAX 9 |
Chris Mason | fabb568 | 2007-06-07 22:13:21 -0400 | [diff] [blame] | 103 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 104 | /* |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 105 | * the key defines the order in the tree, and so it also defines (optimal) |
| 106 | * block layout. objectid corresonds to the inode number. The flags |
| 107 | * tells us things about the object, and is a kind of stream selector. |
| 108 | * so for a given inode, keys with flags of 1 might refer to the inode |
| 109 | * data, flags of 2 may point to file data in the btree and flags == 3 |
| 110 | * may point to extents. |
| 111 | * |
| 112 | * offset is the starting byte offset for this key in the stream. |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 113 | * |
| 114 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always |
| 115 | * in cpu native order. Otherwise they are identical and their sizes |
| 116 | * should be the same (ie both packed) |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 117 | */ |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 118 | struct btrfs_disk_key { |
| 119 | __le64 objectid; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 120 | u8 type; |
Chris Mason | 70b2bef | 2007-04-17 15:39:32 -0400 | [diff] [blame] | 121 | __le64 offset; |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 122 | } __attribute__ ((__packed__)); |
| 123 | |
| 124 | struct btrfs_key { |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 125 | u64 objectid; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 126 | u8 type; |
Chris Mason | 70b2bef | 2007-04-17 15:39:32 -0400 | [diff] [blame] | 127 | u64 offset; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 128 | } __attribute__ ((__packed__)); |
| 129 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 130 | struct btrfs_mapping_tree { |
| 131 | struct extent_map_tree map_tree; |
| 132 | }; |
| 133 | |
| 134 | #define BTRFS_DEV_UUID_SIZE 16 |
| 135 | struct btrfs_dev_item { |
| 136 | /* the internal btrfs device id */ |
| 137 | __le64 devid; |
| 138 | |
| 139 | /* size of the device */ |
| 140 | __le64 total_bytes; |
| 141 | |
| 142 | /* bytes used */ |
| 143 | __le64 bytes_used; |
| 144 | |
| 145 | /* optimal io alignment for this device */ |
| 146 | __le32 io_align; |
| 147 | |
| 148 | /* optimal io width for this device */ |
| 149 | __le32 io_width; |
| 150 | |
| 151 | /* minimal io size for this device */ |
| 152 | __le32 sector_size; |
| 153 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 154 | /* type and info about this device */ |
| 155 | __le64 type; |
| 156 | |
Chris Mason | 0d81ba5 | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 157 | /* btrfs generated uuid for this device */ |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 158 | u8 uuid[BTRFS_DEV_UUID_SIZE]; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 159 | } __attribute__ ((__packed__)); |
| 160 | |
| 161 | struct btrfs_stripe { |
| 162 | __le64 devid; |
| 163 | __le64 offset; |
| 164 | } __attribute__ ((__packed__)); |
| 165 | |
| 166 | struct btrfs_chunk { |
| 167 | __le64 owner; |
| 168 | __le64 stripe_len; |
| 169 | __le64 type; |
| 170 | |
| 171 | /* optimal io alignment for this chunk */ |
| 172 | __le32 io_align; |
| 173 | |
| 174 | /* optimal io width for this chunk */ |
| 175 | __le32 io_width; |
| 176 | |
| 177 | /* minimal io size for this chunk */ |
| 178 | __le32 sector_size; |
| 179 | |
| 180 | /* 2^16 stripes is quite a lot, a second limit is the size of a single |
| 181 | * item in the btree |
| 182 | */ |
| 183 | __le16 num_stripes; |
| 184 | struct btrfs_stripe stripe; |
| 185 | /* additional stripes go here */ |
| 186 | } __attribute__ ((__packed__)); |
| 187 | |
| 188 | static inline unsigned long btrfs_chunk_item_size(int num_stripes) |
| 189 | { |
| 190 | BUG_ON(num_stripes == 0); |
| 191 | return sizeof(struct btrfs_chunk) + |
| 192 | sizeof(struct btrfs_stripe) * (num_stripes - 1); |
| 193 | } |
| 194 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 195 | #define BTRFS_FSID_SIZE 16 |
Chris Mason | 63b10fc | 2008-04-01 11:21:32 -0400 | [diff] [blame] | 196 | #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0) |
| 197 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 198 | /* |
| 199 | * every tree block (leaf or node) starts with this header. |
| 200 | */ |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 201 | struct btrfs_header { |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 202 | u8 csum[BTRFS_CSUM_SIZE]; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 203 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 204 | __le64 bytenr; /* which block this node is supposed to live in */ |
Chris Mason | 63b10fc | 2008-04-01 11:21:32 -0400 | [diff] [blame] | 205 | __le64 flags; |
Chris Mason | 7f5c151 | 2007-03-23 15:56:19 -0400 | [diff] [blame] | 206 | __le64 generation; |
Chris Mason | 4d77567 | 2007-04-20 20:23:12 -0400 | [diff] [blame] | 207 | __le64 owner; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 208 | __le32 nritems; |
Chris Mason | 9a6f11e | 2007-03-27 09:06:38 -0400 | [diff] [blame] | 209 | u8 level; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 210 | } __attribute__ ((__packed__)); |
| 211 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 212 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 213 | sizeof(struct btrfs_header)) / \ |
Chris Mason | 74493f7 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 214 | sizeof(struct btrfs_key_ptr)) |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 215 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 216 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) |
Chris Mason | 236454df | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 217 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
| 218 | sizeof(struct btrfs_item) - \ |
| 219 | sizeof(struct btrfs_file_extent_item)) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 220 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 221 | |
| 222 | /* |
| 223 | * this is a very generous portion of the super block, giving us |
| 224 | * room to translate 14 chunks with 3 stripes each. |
| 225 | */ |
| 226 | #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 |
| 227 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 228 | /* |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 229 | * the super block basically lists the main trees of the FS |
| 230 | * it currently lacks any block count etc etc |
| 231 | */ |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 232 | struct btrfs_super_block { |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 233 | u8 csum[BTRFS_CSUM_SIZE]; |
Chris Mason | 63b10fc | 2008-04-01 11:21:32 -0400 | [diff] [blame] | 234 | /* the first 4 fields must match struct btrfs_header */ |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 235 | u8 fsid[16]; /* FS specific uuid */ |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 236 | __le64 bytenr; /* this block number */ |
Chris Mason | 63b10fc | 2008-04-01 11:21:32 -0400 | [diff] [blame] | 237 | __le64 flags; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 238 | __le64 magic; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 239 | __le64 generation; |
| 240 | __le64 root; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 241 | __le64 chunk_root; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 242 | __le64 total_bytes; |
| 243 | __le64 bytes_used; |
Chris Mason | 2e635a2 | 2007-03-21 11:12:56 -0400 | [diff] [blame] | 244 | __le64 root_dir_objectid; |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 245 | __le64 num_devices; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 246 | __le32 sectorsize; |
| 247 | __le32 nodesize; |
| 248 | __le32 leafsize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 249 | __le32 stripesize; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 250 | __le32 sys_chunk_array_size; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 251 | u8 root_level; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 252 | u8 chunk_root_level; |
Chris Mason | 0d81ba5 | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 253 | struct btrfs_dev_item dev_item; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 254 | u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 255 | } __attribute__ ((__packed__)); |
| 256 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 257 | /* |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 258 | * 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] | 259 | * the item in the leaf (relative to the start of the data area) |
| 260 | */ |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 261 | struct btrfs_item { |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 262 | struct btrfs_disk_key key; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 263 | __le32 offset; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 264 | __le32 size; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 265 | } __attribute__ ((__packed__)); |
| 266 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 267 | /* |
| 268 | * leaves have an item area and a data area: |
| 269 | * [item0, item1....itemN] [free space] [dataN...data1, data0] |
| 270 | * |
| 271 | * The data is separate from the items to get the keys closer together |
| 272 | * during searches. |
| 273 | */ |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 274 | struct btrfs_leaf { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 275 | struct btrfs_header header; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 276 | struct btrfs_item items[]; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 277 | } __attribute__ ((__packed__)); |
| 278 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 279 | /* |
| 280 | * all non-leaf blocks are nodes, they hold only keys and pointers to |
| 281 | * other blocks |
| 282 | */ |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 283 | struct btrfs_key_ptr { |
| 284 | struct btrfs_disk_key key; |
| 285 | __le64 blockptr; |
Chris Mason | 74493f7 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 286 | __le64 generation; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 287 | } __attribute__ ((__packed__)); |
| 288 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 289 | struct btrfs_node { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 290 | struct btrfs_header header; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 291 | struct btrfs_key_ptr ptrs[]; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 292 | } __attribute__ ((__packed__)); |
| 293 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 294 | /* |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 295 | * btrfs_paths remember the path taken from the root down to the leaf. |
| 296 | * 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] | 297 | * to any other levels that are present. |
| 298 | * |
| 299 | * The slots array records the index of the item or block pointer |
| 300 | * used while walking the tree. |
| 301 | */ |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 302 | struct btrfs_path { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 303 | struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 304 | int slots[BTRFS_MAX_LEVEL]; |
Chris Mason | 3c69fae | 2007-08-07 15:52:22 -0400 | [diff] [blame] | 305 | int reada; |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 306 | int lowest_level; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 307 | }; |
Chris Mason | 5de08d7 | 2007-02-24 06:24:44 -0500 | [diff] [blame] | 308 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 309 | /* |
| 310 | * items in the extent btree are used to record the objectid of the |
| 311 | * owner of the block and the number of references |
| 312 | */ |
| 313 | struct btrfs_extent_item { |
| 314 | __le32 refs; |
Chris Mason | 74493f7 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 315 | } __attribute__ ((__packed__)); |
| 316 | |
| 317 | struct btrfs_extent_ref { |
| 318 | __le64 root; |
| 319 | __le64 generation; |
| 320 | __le64 objectid; |
| 321 | __le64 offset; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 322 | } __attribute__ ((__packed__)); |
| 323 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 324 | /* dev extents record free space on individual devices. The owner |
| 325 | * field points back to the chunk allocation mapping tree that allocated |
| 326 | * the extent |
| 327 | */ |
| 328 | struct btrfs_dev_extent { |
| 329 | __le64 owner; |
| 330 | __le64 length; |
| 331 | } __attribute__ ((__packed__)); |
| 332 | |
| 333 | |
Chris Mason | 3954401 | 2007-12-12 14:38:19 -0500 | [diff] [blame] | 334 | struct btrfs_inode_ref { |
| 335 | __le16 name_len; |
| 336 | /* name goes here */ |
| 337 | } __attribute__ ((__packed__)); |
| 338 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 339 | struct btrfs_timespec { |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 340 | __le64 sec; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 341 | __le32 nsec; |
| 342 | } __attribute__ ((__packed__)); |
| 343 | |
| 344 | /* |
| 345 | * there is no padding here on purpose. If you want to extent the inode, |
| 346 | * make a new item type |
| 347 | */ |
| 348 | struct btrfs_inode_item { |
| 349 | __le64 generation; |
| 350 | __le64 size; |
| 351 | __le64 nblocks; |
Chris Mason | 31f3c99 | 2007-04-30 15:25:45 -0400 | [diff] [blame] | 352 | __le64 block_group; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 353 | __le32 nlink; |
| 354 | __le32 uid; |
| 355 | __le32 gid; |
| 356 | __le32 mode; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 357 | __le64 rdev; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 358 | __le16 flags; |
| 359 | __le16 compat_flags; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 360 | struct btrfs_timespec atime; |
| 361 | struct btrfs_timespec ctime; |
| 362 | struct btrfs_timespec mtime; |
| 363 | struct btrfs_timespec otime; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 364 | } __attribute__ ((__packed__)); |
| 365 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 366 | struct btrfs_dir_item { |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 367 | struct btrfs_disk_key location; |
Josef Bacik | 5103e94 | 2007-11-16 11:45:54 -0500 | [diff] [blame] | 368 | __le16 data_len; |
Chris Mason | a8a2ee0 | 2007-03-16 08:46:49 -0400 | [diff] [blame] | 369 | __le16 name_len; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 370 | u8 type; |
| 371 | } __attribute__ ((__packed__)); |
| 372 | |
| 373 | struct btrfs_root_item { |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 374 | struct btrfs_inode_item inode; |
| 375 | __le64 root_dirid; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 376 | __le64 bytenr; |
| 377 | __le64 byte_limit; |
| 378 | __le64 bytes_used; |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 379 | __le32 flags; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 380 | __le32 refs; |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 381 | struct btrfs_disk_key drop_progress; |
| 382 | u8 drop_level; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 383 | u8 level; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 384 | } __attribute__ ((__packed__)); |
| 385 | |
Chris Mason | 236454df | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 386 | #define BTRFS_FILE_EXTENT_REG 0 |
| 387 | #define BTRFS_FILE_EXTENT_INLINE 1 |
| 388 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 389 | struct btrfs_file_extent_item { |
Chris Mason | 71951f3 | 2007-03-27 09:16:29 -0400 | [diff] [blame] | 390 | __le64 generation; |
Chris Mason | 236454df | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 391 | u8 type; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 392 | /* |
| 393 | * disk space consumed by the extent, checksum blocks are included |
| 394 | * in these numbers |
| 395 | */ |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 396 | __le64 disk_bytenr; |
| 397 | __le64 disk_num_bytes; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 398 | /* |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 399 | * the logical offset in file blocks (no csums) |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 400 | * this extent record is for. This allows a file extent to point |
| 401 | * into the middle of an existing extent on disk, sharing it |
| 402 | * between two snapshots (useful if some bytes in the middle of the |
| 403 | * extent have changed |
| 404 | */ |
| 405 | __le64 offset; |
| 406 | /* |
| 407 | * the logical number of file blocks (no csums included) |
| 408 | */ |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 409 | __le64 num_bytes; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 410 | } __attribute__ ((__packed__)); |
| 411 | |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 412 | struct btrfs_csum_item { |
Chris Mason | 509659c | 2007-05-10 12:36:17 -0400 | [diff] [blame] | 413 | u8 csum; |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 414 | } __attribute__ ((__packed__)); |
| 415 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 416 | /* different types of block groups (and chunks) */ |
| 417 | #define BTRFS_BLOCK_GROUP_DATA (1 << 0) |
| 418 | #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1) |
| 419 | #define BTRFS_BLOCK_GROUP_METADATA (1 << 2) |
Chris Mason | 593060d | 2008-03-25 16:50:33 -0400 | [diff] [blame] | 420 | #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3) |
Chris Mason | 1e2677e | 2007-05-29 16:52:18 -0400 | [diff] [blame] | 421 | |
| 422 | |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 423 | struct btrfs_block_group_item { |
| 424 | __le64 used; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 425 | __le64 chunk_tree; |
| 426 | __le64 chunk_objectid; |
| 427 | __le64 flags; |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 428 | } __attribute__ ((__packed__)); |
| 429 | |
Chris Mason | 6324fbf | 2008-03-24 15:01:59 -0400 | [diff] [blame] | 430 | struct btrfs_space_info { |
| 431 | u64 flags; |
| 432 | u64 total_bytes; |
| 433 | u64 bytes_used; |
| 434 | u64 bytes_pinned; |
| 435 | int full; |
| 436 | struct list_head list; |
| 437 | }; |
| 438 | |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 439 | struct btrfs_block_group_cache { |
| 440 | struct btrfs_key key; |
| 441 | struct btrfs_block_group_item item; |
Chris Mason | 6324fbf | 2008-03-24 15:01:59 -0400 | [diff] [blame] | 442 | struct btrfs_space_info *space_info; |
Yan | 324ae4d | 2007-11-16 14:57:08 -0500 | [diff] [blame] | 443 | u64 pinned; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 444 | u64 flags; |
| 445 | int cached; |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 446 | }; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 447 | |
| 448 | struct btrfs_device; |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 449 | struct btrfs_fs_devices; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 450 | struct btrfs_fs_info { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 451 | u8 fsid[BTRFS_FSID_SIZE]; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 452 | struct btrfs_root *extent_root; |
| 453 | struct btrfs_root *tree_root; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 454 | struct btrfs_root *chunk_root; |
| 455 | struct btrfs_root *dev_root; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 456 | struct radix_tree_root fs_roots_radix; |
Chris Mason | 1a5bc16 | 2007-10-15 16:15:26 -0400 | [diff] [blame] | 457 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 458 | struct extent_io_tree free_space_cache; |
| 459 | struct extent_io_tree block_group_cache; |
| 460 | struct extent_io_tree pinned_extents; |
| 461 | struct extent_io_tree pending_del; |
| 462 | struct extent_io_tree extent_ins; |
Chris Mason | 1a5bc16 | 2007-10-15 16:15:26 -0400 | [diff] [blame] | 463 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 464 | /* logical->physical extent mapping */ |
| 465 | struct btrfs_mapping_tree mapping_tree; |
| 466 | |
Chris Mason | 293ffd5 | 2007-03-20 15:57:25 -0400 | [diff] [blame] | 467 | u64 generation; |
Josef Bacik | 15ee9bc | 2007-08-10 16:22:09 -0400 | [diff] [blame] | 468 | u64 last_trans_committed; |
Chris Mason | b6cda9b | 2007-12-14 15:30:32 -0500 | [diff] [blame] | 469 | unsigned long mount_opt; |
Chris Mason | c59f895 | 2007-12-17 20:14:04 -0500 | [diff] [blame] | 470 | u64 max_extent; |
Chris Mason | 6f568d3 | 2008-01-29 16:03:38 -0500 | [diff] [blame] | 471 | u64 max_inline; |
Chris Mason | 8f662a7 | 2008-01-02 10:01:11 -0500 | [diff] [blame] | 472 | u64 alloc_start; |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 473 | struct btrfs_transaction *running_transaction; |
Chris Mason | 4b52dff | 2007-06-26 10:06:50 -0400 | [diff] [blame] | 474 | struct btrfs_super_block super_copy; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 475 | struct extent_buffer *sb_buffer; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 476 | struct block_device *__bdev; |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 477 | struct super_block *sb; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 478 | struct inode *btree_inode; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 479 | struct backing_dev_info bdi; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 480 | spinlock_t hash_lock; |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 481 | struct mutex trans_mutex; |
Chris Mason | d561c02 | 2007-03-23 19:47:49 -0400 | [diff] [blame] | 482 | struct mutex fs_mutex; |
Chris Mason | 8fd1779 | 2007-04-19 21:01:03 -0400 | [diff] [blame] | 483 | struct list_head trans_list; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 484 | struct list_head hashers; |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 485 | struct list_head dead_roots; |
Chris Mason | 6da6aba | 2007-12-18 16:15:09 -0500 | [diff] [blame] | 486 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18) |
| 487 | struct work_struct trans_work; |
| 488 | #else |
Chris Mason | 08607c1 | 2007-06-08 15:33:54 -0400 | [diff] [blame] | 489 | struct delayed_work trans_work; |
Chris Mason | 6da6aba | 2007-12-18 16:15:09 -0500 | [diff] [blame] | 490 | #endif |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 491 | struct kobject super_kobj; |
| 492 | struct completion kobj_unregister; |
Chris Mason | e66f709 | 2007-04-20 13:16:02 -0400 | [diff] [blame] | 493 | int do_barriers; |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 494 | int closing; |
Chris Mason | e2008b6 | 2008-01-08 15:46:30 -0500 | [diff] [blame] | 495 | unsigned long throttles; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 496 | |
Yan | 324ae4d | 2007-11-16 14:57:08 -0500 | [diff] [blame] | 497 | u64 total_pinned; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 498 | struct list_head dirty_cowonly_roots; |
| 499 | |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 500 | struct btrfs_fs_devices *fs_devices; |
Chris Mason | 6324fbf | 2008-03-24 15:01:59 -0400 | [diff] [blame] | 501 | struct list_head space_info; |
Chris Mason | 1832a6d | 2007-12-21 16:27:21 -0500 | [diff] [blame] | 502 | spinlock_t delalloc_lock; |
Chris Mason | cee36a0 | 2008-01-15 08:40:48 -0500 | [diff] [blame] | 503 | spinlock_t new_trans_lock; |
Chris Mason | 1832a6d | 2007-12-21 16:27:21 -0500 | [diff] [blame] | 504 | u64 delalloc_bytes; |
Chris Mason | e18e480 | 2008-01-18 10:54:22 -0500 | [diff] [blame] | 505 | u64 last_alloc; |
Chris Mason | 4529ba4 | 2008-01-31 16:45:07 -0500 | [diff] [blame] | 506 | u64 last_data_alloc; |
Chris Mason | 593060d | 2008-03-25 16:50:33 -0400 | [diff] [blame] | 507 | int extra_data_alloc_bits; |
| 508 | int extra_alloc_bits; |
Yan | 324ae4d | 2007-11-16 14:57:08 -0500 | [diff] [blame] | 509 | }; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 510 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 511 | /* |
| 512 | * 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] | 513 | * and for the extent tree extent_root root. |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 514 | */ |
| 515 | struct btrfs_root { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 516 | struct extent_buffer *node; |
| 517 | struct extent_buffer *commit_root; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 518 | struct btrfs_root_item root_item; |
| 519 | struct btrfs_key root_key; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 520 | struct btrfs_fs_info *fs_info; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 521 | struct inode *inode; |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 522 | struct kobject root_kobj; |
| 523 | struct completion kobj_unregister; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 524 | u64 objectid; |
| 525 | u64 last_trans; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 526 | |
| 527 | /* data allocations are done in sectorsize units */ |
| 528 | u32 sectorsize; |
| 529 | |
| 530 | /* node allocations are done in nodesize units */ |
| 531 | u32 nodesize; |
| 532 | |
| 533 | /* leaf allocations are done in leafsize units */ |
| 534 | u32 leafsize; |
| 535 | |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 536 | u32 stripesize; |
| 537 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 538 | u32 type; |
Chris Mason | 1b05da2 | 2007-04-10 12:13:09 -0400 | [diff] [blame] | 539 | u64 highest_inode; |
| 540 | u64 last_inode_alloc; |
Chris Mason | 9f3a742 | 2007-08-07 15:52:19 -0400 | [diff] [blame] | 541 | int ref_cows; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 542 | int track_dirty; |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 543 | struct btrfs_key defrag_progress; |
| 544 | int defrag_running; |
| 545 | int defrag_level; |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 546 | char *name; |
Chris Mason | 4313b39 | 2008-01-03 09:08:48 -0500 | [diff] [blame] | 547 | int in_sysfs; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 548 | |
| 549 | /* the dirty list is only used by non-reference counted roots */ |
| 550 | struct list_head dirty_list; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 551 | }; |
| 552 | |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 553 | /* |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 554 | |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 555 | * inode items have the data typically returned from stat and store other |
| 556 | * info about object characteristics. There is one for every file and dir in |
| 557 | * the FS |
| 558 | */ |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 559 | #define BTRFS_INODE_ITEM_KEY 1 |
Chris Mason | 3954401 | 2007-12-12 14:38:19 -0500 | [diff] [blame] | 560 | #define BTRFS_INODE_REF_KEY 2 |
| 561 | #define BTRFS_XATTR_ITEM_KEY 8 |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 562 | /* reserve 2-15 close to the inode for later flexibility */ |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 563 | |
| 564 | /* |
| 565 | * dir items are the name -> inode pointers in a directory. There is one |
| 566 | * for every name in a directory. |
| 567 | */ |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 568 | #define BTRFS_DIR_ITEM_KEY 16 |
| 569 | #define BTRFS_DIR_INDEX_KEY 17 |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 570 | /* |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 571 | * extent data is for file data |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 572 | */ |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 573 | #define BTRFS_EXTENT_DATA_KEY 18 |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 574 | /* |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 575 | * csum items have the checksums for data in the extents |
| 576 | */ |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 577 | #define BTRFS_CSUM_ITEM_KEY 19 |
| 578 | |
| 579 | /* reserve 20-31 for other file stuff */ |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 580 | |
| 581 | /* |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 582 | * root items point to tree roots. There are typically in the root |
| 583 | * tree used by the super block to find all the other trees |
| 584 | */ |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 585 | #define BTRFS_ROOT_ITEM_KEY 32 |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 586 | /* |
| 587 | * extent items are in the extent map tree. These record which blocks |
| 588 | * are used, and how many references there are to each block |
| 589 | */ |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 590 | #define BTRFS_EXTENT_ITEM_KEY 33 |
Chris Mason | 74493f7 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 591 | #define BTRFS_EXTENT_REF_KEY 34 |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 592 | |
| 593 | /* |
| 594 | * block groups give us hints into the extent allocation trees. Which |
| 595 | * blocks are free etc etc |
| 596 | */ |
Chris Mason | 74493f7 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 597 | #define BTRFS_BLOCK_GROUP_ITEM_KEY 50 |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 598 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 599 | #define BTRFS_DEV_EXTENT_KEY 75 |
| 600 | #define BTRFS_DEV_ITEM_KEY 76 |
| 601 | #define BTRFS_CHUNK_ITEM_KEY 77 |
| 602 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 603 | /* |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 604 | * string items are for debugging. They just store a short string of |
| 605 | * data in the FS |
| 606 | */ |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 607 | #define BTRFS_STRING_ITEM_KEY 253 |
| 608 | |
Chris Mason | 21ad10c | 2008-01-09 09:23:21 -0500 | [diff] [blame] | 609 | #define BTRFS_MOUNT_NODATASUM (1 << 0) |
| 610 | #define BTRFS_MOUNT_NODATACOW (1 << 1) |
| 611 | #define BTRFS_MOUNT_NOBARRIER (1 << 2) |
Chris Mason | e18e480 | 2008-01-18 10:54:22 -0500 | [diff] [blame] | 612 | #define BTRFS_MOUNT_SSD (1 << 3) |
Chris Mason | b6cda9b | 2007-12-14 15:30:32 -0500 | [diff] [blame] | 613 | |
| 614 | #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) |
| 615 | #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) |
| 616 | #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ |
| 617 | BTRFS_MOUNT_##opt) |
Yan | b98b676 | 2008-01-08 15:54:37 -0500 | [diff] [blame] | 618 | /* |
| 619 | * Inode flags |
| 620 | */ |
Yan | fdebe2b | 2008-01-14 13:26:08 -0500 | [diff] [blame] | 621 | #define BTRFS_INODE_NODATASUM (1 << 0) |
| 622 | #define BTRFS_INODE_NODATACOW (1 << 1) |
| 623 | #define BTRFS_INODE_READONLY (1 << 2) |
Yan | b98b676 | 2008-01-08 15:54:37 -0500 | [diff] [blame] | 624 | #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \ |
| 625 | ~BTRFS_INODE_##flag) |
| 626 | #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \ |
| 627 | BTRFS_INODE_##flag) |
| 628 | #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \ |
| 629 | BTRFS_INODE_##flag) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 630 | /* some macros to generate set/get funcs for the struct fields. This |
| 631 | * assumes there is a lefoo_to_cpu for every type, so lets make a simple |
| 632 | * one for u8: |
| 633 | */ |
| 634 | #define le8_to_cpu(v) (v) |
| 635 | #define cpu_to_le8(v) (v) |
| 636 | #define __le8 u8 |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 637 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 638 | #define read_eb_member(eb, ptr, type, member, result) ( \ |
| 639 | read_extent_buffer(eb, (char *)(result), \ |
| 640 | ((unsigned long)(ptr)) + \ |
| 641 | offsetof(type, member), \ |
| 642 | sizeof(((type *)0)->member))) |
| 643 | |
| 644 | #define write_eb_member(eb, ptr, type, member, result) ( \ |
| 645 | write_extent_buffer(eb, (char *)(result), \ |
| 646 | ((unsigned long)(ptr)) + \ |
| 647 | offsetof(type, member), \ |
| 648 | sizeof(((type *)0)->member))) |
| 649 | |
Chris Mason | 0f82731 | 2007-10-15 16:18:56 -0400 | [diff] [blame] | 650 | #ifndef BTRFS_SETGET_FUNCS |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 651 | #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ |
Chris Mason | 0f82731 | 2007-10-15 16:18:56 -0400 | [diff] [blame] | 652 | u##bits btrfs_##name(struct extent_buffer *eb, type *s); \ |
| 653 | void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); |
| 654 | #endif |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 655 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 656 | #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ |
| 657 | static inline u##bits btrfs_##name(struct extent_buffer *eb) \ |
| 658 | { \ |
David Miller | df68b8a | 2008-02-15 10:40:52 -0500 | [diff] [blame] | 659 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
| 660 | u##bits res = le##bits##_to_cpu(p->member); \ |
| 661 | kunmap_atomic(p, KM_USER0); \ |
Chris Mason | 810191f | 2007-10-15 16:18:55 -0400 | [diff] [blame] | 662 | return res; \ |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 663 | } \ |
| 664 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ |
| 665 | u##bits val) \ |
| 666 | { \ |
David Miller | df68b8a | 2008-02-15 10:40:52 -0500 | [diff] [blame] | 667 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
| 668 | p->member = cpu_to_le##bits(val); \ |
| 669 | kunmap_atomic(p, KM_USER0); \ |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 670 | } |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 671 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 672 | #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ |
| 673 | static inline u##bits btrfs_##name(type *s) \ |
| 674 | { \ |
| 675 | return le##bits##_to_cpu(s->member); \ |
| 676 | } \ |
| 677 | static inline void btrfs_set_##name(type *s, u##bits val) \ |
| 678 | { \ |
| 679 | s->member = cpu_to_le##bits(val); \ |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 680 | } |
| 681 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 682 | BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); |
| 683 | BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); |
| 684 | BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); |
| 685 | BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); |
| 686 | BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); |
| 687 | BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); |
| 688 | BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 689 | |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 690 | BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); |
| 691 | BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, |
| 692 | total_bytes, 64); |
| 693 | BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, |
| 694 | bytes_used, 64); |
| 695 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, |
| 696 | io_align, 32); |
| 697 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, |
| 698 | io_width, 32); |
| 699 | BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, |
| 700 | sector_size, 32); |
| 701 | BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); |
| 702 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 703 | static inline char *btrfs_device_uuid(struct btrfs_dev_item *d) |
| 704 | { |
| 705 | return (char *)d + offsetof(struct btrfs_dev_item, uuid); |
| 706 | } |
| 707 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 708 | BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); |
| 709 | BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); |
| 710 | BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); |
| 711 | BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); |
| 712 | BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); |
| 713 | BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); |
| 714 | BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); |
| 715 | BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); |
| 716 | BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); |
| 717 | |
| 718 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); |
| 719 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, |
| 720 | stripe_len, 64); |
| 721 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, |
| 722 | io_align, 32); |
| 723 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, |
| 724 | io_width, 32); |
| 725 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, |
| 726 | sector_size, 32); |
| 727 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); |
| 728 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, |
| 729 | num_stripes, 16); |
| 730 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); |
| 731 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); |
| 732 | |
| 733 | static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, |
| 734 | int nr) |
| 735 | { |
| 736 | unsigned long offset = (unsigned long)c; |
| 737 | offset += offsetof(struct btrfs_chunk, stripe); |
| 738 | offset += nr * sizeof(struct btrfs_stripe); |
| 739 | return (struct btrfs_stripe *)offset; |
| 740 | } |
| 741 | |
| 742 | static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, |
| 743 | struct btrfs_chunk *c, int nr) |
| 744 | { |
| 745 | return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); |
| 746 | } |
| 747 | |
| 748 | static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb, |
| 749 | struct btrfs_chunk *c, int nr, |
| 750 | u64 val) |
| 751 | { |
| 752 | btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val); |
| 753 | } |
| 754 | |
| 755 | static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, |
| 756 | struct btrfs_chunk *c, int nr) |
| 757 | { |
| 758 | return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); |
| 759 | } |
| 760 | |
| 761 | static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb, |
| 762 | struct btrfs_chunk *c, int nr, |
| 763 | u64 val) |
| 764 | { |
| 765 | btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val); |
| 766 | } |
| 767 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 768 | /* struct btrfs_block_group_item */ |
| 769 | BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, |
| 770 | used, 64); |
| 771 | BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, |
| 772 | used, 64); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 773 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_tree, struct btrfs_block_group_item, |
| 774 | chunk_tree, 64); |
| 775 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_tree, struct btrfs_block_group_item, |
| 776 | chunk_tree, 64); |
| 777 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, |
| 778 | struct btrfs_block_group_item, chunk_objectid, 64); |
| 779 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_objecitd, |
| 780 | struct btrfs_block_group_item, chunk_objectid, 64); |
| 781 | BTRFS_SETGET_FUNCS(disk_block_group_flags, |
| 782 | struct btrfs_block_group_item, flags, 64); |
| 783 | BTRFS_SETGET_STACK_FUNCS(block_group_flags, |
| 784 | struct btrfs_block_group_item, flags, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 785 | |
Chris Mason | 3954401 | 2007-12-12 14:38:19 -0500 | [diff] [blame] | 786 | /* struct btrfs_inode_ref */ |
| 787 | BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); |
| 788 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 789 | /* struct btrfs_inode_item */ |
| 790 | BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); |
| 791 | BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); |
| 792 | BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64); |
| 793 | BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); |
| 794 | BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); |
| 795 | BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); |
| 796 | BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); |
| 797 | BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 798 | BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 799 | BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16); |
| 800 | BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item, |
| 801 | compat_flags, 16); |
| 802 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 803 | static inline struct btrfs_timespec * |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 804 | btrfs_inode_atime(struct btrfs_inode_item *inode_item) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 805 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 806 | unsigned long ptr = (unsigned long)inode_item; |
| 807 | ptr += offsetof(struct btrfs_inode_item, atime); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 808 | return (struct btrfs_timespec *)ptr; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 809 | } |
| 810 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 811 | static inline struct btrfs_timespec * |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 812 | btrfs_inode_mtime(struct btrfs_inode_item *inode_item) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 813 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 814 | unsigned long ptr = (unsigned long)inode_item; |
| 815 | ptr += offsetof(struct btrfs_inode_item, mtime); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 816 | return (struct btrfs_timespec *)ptr; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 817 | } |
| 818 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 819 | static inline struct btrfs_timespec * |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 820 | btrfs_inode_ctime(struct btrfs_inode_item *inode_item) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 821 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 822 | unsigned long ptr = (unsigned long)inode_item; |
| 823 | ptr += offsetof(struct btrfs_inode_item, ctime); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 824 | return (struct btrfs_timespec *)ptr; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 825 | } |
| 826 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 827 | static inline struct btrfs_timespec * |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 828 | btrfs_inode_otime(struct btrfs_inode_item *inode_item) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 829 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 830 | unsigned long ptr = (unsigned long)inode_item; |
| 831 | ptr += offsetof(struct btrfs_inode_item, otime); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 832 | return (struct btrfs_timespec *)ptr; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 833 | } |
| 834 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 835 | BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); |
| 836 | BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 837 | |
| 838 | /* struct btrfs_extent_item */ |
| 839 | BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32); |
Chris Mason | 74493f7 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 840 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 841 | /* struct btrfs_dev_extent */ |
| 842 | BTRFS_SETGET_FUNCS(dev_extent_owner, struct btrfs_dev_extent, owner, 64); |
| 843 | BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); |
| 844 | |
Chris Mason | 74493f7 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 845 | /* struct btrfs_extent_ref */ |
| 846 | BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64); |
| 847 | BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64); |
| 848 | BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64); |
| 849 | BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64); |
| 850 | |
Chris Mason | 7bb8631 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 851 | BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64); |
| 852 | BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref, |
Chris Mason | 74493f7 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 853 | generation, 64); |
Chris Mason | 7bb8631 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 854 | BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref, |
| 855 | objectid, 64); |
| 856 | BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 857 | |
| 858 | BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, |
| 859 | refs, 32); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 860 | |
| 861 | /* struct btrfs_node */ |
| 862 | BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); |
Chris Mason | 74493f7 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 863 | BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 864 | |
| 865 | static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 866 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 867 | unsigned long ptr; |
| 868 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 869 | sizeof(struct btrfs_key_ptr) * nr; |
| 870 | return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 871 | } |
| 872 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 873 | static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, |
| 874 | int nr, u64 val) |
Chris Mason | 31f3c99 | 2007-04-30 15:25:45 -0400 | [diff] [blame] | 875 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 876 | unsigned long ptr; |
| 877 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 878 | sizeof(struct btrfs_key_ptr) * nr; |
| 879 | btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); |
Chris Mason | 31f3c99 | 2007-04-30 15:25:45 -0400 | [diff] [blame] | 880 | } |
| 881 | |
Chris Mason | 74493f7 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 882 | static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) |
| 883 | { |
| 884 | unsigned long ptr; |
| 885 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 886 | sizeof(struct btrfs_key_ptr) * nr; |
| 887 | return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); |
| 888 | } |
| 889 | |
| 890 | static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, |
| 891 | int nr, u64 val) |
| 892 | { |
| 893 | unsigned long ptr; |
| 894 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 895 | sizeof(struct btrfs_key_ptr) * nr; |
| 896 | btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); |
| 897 | } |
| 898 | |
Chris Mason | 810191f | 2007-10-15 16:18:55 -0400 | [diff] [blame] | 899 | static inline unsigned long btrfs_node_key_ptr_offset(int nr) |
Chris Mason | 31f3c99 | 2007-04-30 15:25:45 -0400 | [diff] [blame] | 900 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 901 | return offsetof(struct btrfs_node, ptrs) + |
| 902 | sizeof(struct btrfs_key_ptr) * nr; |
Chris Mason | 31f3c99 | 2007-04-30 15:25:45 -0400 | [diff] [blame] | 903 | } |
| 904 | |
Chris Mason | e644d02 | 2007-11-06 15:09:29 -0500 | [diff] [blame] | 905 | void btrfs_node_key(struct extent_buffer *eb, |
| 906 | struct btrfs_disk_key *disk_key, int nr); |
| 907 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 908 | static inline void btrfs_set_node_key(struct extent_buffer *eb, |
| 909 | struct btrfs_disk_key *disk_key, int nr) |
| 910 | { |
| 911 | unsigned long ptr; |
| 912 | ptr = btrfs_node_key_ptr_offset(nr); |
| 913 | write_eb_member(eb, (struct btrfs_key_ptr *)ptr, |
| 914 | struct btrfs_key_ptr, key, disk_key); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 915 | } |
| 916 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 917 | /* struct btrfs_item */ |
| 918 | BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); |
| 919 | BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); |
| 920 | |
| 921 | static inline unsigned long btrfs_item_nr_offset(int nr) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 922 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 923 | return offsetof(struct btrfs_leaf, items) + |
| 924 | sizeof(struct btrfs_item) * nr; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 925 | } |
| 926 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 927 | static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb, |
| 928 | int nr) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 929 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 930 | return (struct btrfs_item *)btrfs_item_nr_offset(nr); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 931 | } |
| 932 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 933 | static inline u32 btrfs_item_end(struct extent_buffer *eb, |
| 934 | struct btrfs_item *item) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 935 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 936 | return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 937 | } |
| 938 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 939 | static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 940 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 941 | return btrfs_item_end(eb, btrfs_item_nr(eb, nr)); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 942 | } |
| 943 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 944 | static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 945 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 946 | return btrfs_item_offset(eb, btrfs_item_nr(eb, nr)); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 947 | } |
| 948 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 949 | static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 950 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 951 | return btrfs_item_size(eb, btrfs_item_nr(eb, nr)); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 952 | } |
| 953 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 954 | static inline void btrfs_item_key(struct extent_buffer *eb, |
| 955 | struct btrfs_disk_key *disk_key, int nr) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 956 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 957 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
| 958 | read_eb_member(eb, item, struct btrfs_item, key, disk_key); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 959 | } |
| 960 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 961 | static inline void btrfs_set_item_key(struct extent_buffer *eb, |
| 962 | struct btrfs_disk_key *disk_key, int nr) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 963 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 964 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
| 965 | write_eb_member(eb, item, struct btrfs_item, key, disk_key); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 966 | } |
| 967 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 968 | /* struct btrfs_dir_item */ |
Josef Bacik | 5103e94 | 2007-11-16 11:45:54 -0500 | [diff] [blame] | 969 | BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 970 | BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); |
| 971 | BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); |
| 972 | |
| 973 | static inline void btrfs_dir_item_key(struct extent_buffer *eb, |
| 974 | struct btrfs_dir_item *item, |
| 975 | struct btrfs_disk_key *key) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 976 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 977 | read_eb_member(eb, item, struct btrfs_dir_item, location, key); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 978 | } |
| 979 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 980 | static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, |
| 981 | struct btrfs_dir_item *item, |
| 982 | struct btrfs_disk_key *key) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 983 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 984 | write_eb_member(eb, item, struct btrfs_dir_item, location, key); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 985 | } |
| 986 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 987 | /* struct btrfs_disk_key */ |
| 988 | BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, |
| 989 | objectid, 64); |
| 990 | BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); |
| 991 | BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); |
Chris Mason | 1d4f640 | 2007-03-15 15:18:43 -0400 | [diff] [blame] | 992 | |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 993 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
| 994 | struct btrfs_disk_key *disk) |
| 995 | { |
| 996 | cpu->offset = le64_to_cpu(disk->offset); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 997 | cpu->type = disk->type; |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 998 | cpu->objectid = le64_to_cpu(disk->objectid); |
| 999 | } |
| 1000 | |
| 1001 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, |
| 1002 | struct btrfs_key *cpu) |
| 1003 | { |
| 1004 | disk->offset = cpu_to_le64(cpu->offset); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1005 | disk->type = cpu->type; |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1006 | disk->objectid = cpu_to_le64(cpu->objectid); |
| 1007 | } |
| 1008 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1009 | static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, |
| 1010 | struct btrfs_key *key, int nr) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1011 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1012 | struct btrfs_disk_key disk_key; |
| 1013 | btrfs_node_key(eb, &disk_key, nr); |
| 1014 | btrfs_disk_key_to_cpu(key, &disk_key); |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1015 | } |
| 1016 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1017 | static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, |
| 1018 | struct btrfs_key *key, int nr) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1019 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1020 | struct btrfs_disk_key disk_key; |
| 1021 | btrfs_item_key(eb, &disk_key, nr); |
| 1022 | btrfs_disk_key_to_cpu(key, &disk_key); |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1023 | } |
| 1024 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1025 | static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, |
| 1026 | struct btrfs_dir_item *item, |
| 1027 | struct btrfs_key *key) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1028 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1029 | struct btrfs_disk_key disk_key; |
| 1030 | btrfs_dir_item_key(eb, item, &disk_key); |
| 1031 | btrfs_disk_key_to_cpu(key, &disk_key); |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1032 | } |
| 1033 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1034 | |
| 1035 | static inline u8 btrfs_key_type(struct btrfs_key *key) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1036 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1037 | return key->type; |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1038 | } |
| 1039 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1040 | static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1041 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1042 | key->type = val; |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1043 | } |
| 1044 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1045 | /* struct btrfs_header */ |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1046 | BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1047 | BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, |
| 1048 | generation, 64); |
| 1049 | BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); |
| 1050 | BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); |
Chris Mason | 63b10fc | 2008-04-01 11:21:32 -0400 | [diff] [blame] | 1051 | BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1052 | BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); |
| 1053 | |
Chris Mason | 63b10fc | 2008-04-01 11:21:32 -0400 | [diff] [blame] | 1054 | static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) |
| 1055 | { |
| 1056 | return (btrfs_header_flags(eb) & flag) == flag; |
| 1057 | } |
| 1058 | |
| 1059 | static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) |
| 1060 | { |
| 1061 | u64 flags = btrfs_header_flags(eb); |
| 1062 | btrfs_set_header_flags(eb, flags | flag); |
| 1063 | return (flags & flag) == flag; |
| 1064 | } |
| 1065 | |
| 1066 | static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) |
| 1067 | { |
| 1068 | u64 flags = btrfs_header_flags(eb); |
| 1069 | btrfs_set_header_flags(eb, flags & ~flag); |
| 1070 | return (flags & flag) == flag; |
| 1071 | } |
| 1072 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1073 | static inline u8 *btrfs_header_fsid(struct extent_buffer *eb) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1074 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1075 | unsigned long ptr = offsetof(struct btrfs_header, fsid); |
| 1076 | return (u8 *)ptr; |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1077 | } |
| 1078 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1079 | static inline u8 *btrfs_super_fsid(struct extent_buffer *eb) |
Chris Mason | a429e51 | 2007-04-18 16:15:28 -0400 | [diff] [blame] | 1080 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1081 | unsigned long ptr = offsetof(struct btrfs_super_block, fsid); |
| 1082 | return (u8 *)ptr; |
Chris Mason | a429e51 | 2007-04-18 16:15:28 -0400 | [diff] [blame] | 1083 | } |
| 1084 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1085 | static inline u8 *btrfs_header_csum(struct extent_buffer *eb) |
Chris Mason | a429e51 | 2007-04-18 16:15:28 -0400 | [diff] [blame] | 1086 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1087 | unsigned long ptr = offsetof(struct btrfs_header, csum); |
| 1088 | return (u8 *)ptr; |
Chris Mason | a429e51 | 2007-04-18 16:15:28 -0400 | [diff] [blame] | 1089 | } |
| 1090 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1091 | static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb) |
Chris Mason | a429e51 | 2007-04-18 16:15:28 -0400 | [diff] [blame] | 1092 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1093 | return NULL; |
Chris Mason | a429e51 | 2007-04-18 16:15:28 -0400 | [diff] [blame] | 1094 | } |
| 1095 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1096 | static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb) |
Chris Mason | a429e51 | 2007-04-18 16:15:28 -0400 | [diff] [blame] | 1097 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1098 | return NULL; |
Chris Mason | a429e51 | 2007-04-18 16:15:28 -0400 | [diff] [blame] | 1099 | } |
| 1100 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1101 | static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb) |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 1102 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1103 | return NULL; |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 1104 | } |
| 1105 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1106 | static inline int btrfs_is_leaf(struct extent_buffer *eb) |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 1107 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1108 | return (btrfs_header_level(eb) == 0); |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 1109 | } |
| 1110 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1111 | /* struct btrfs_root_item */ |
| 1112 | BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1113 | BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); |
| 1114 | BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1115 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1116 | BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); |
| 1117 | BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1118 | BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); |
| 1119 | BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); |
| 1120 | BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1121 | BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); |
| 1122 | BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1123 | |
| 1124 | /* struct btrfs_super_block */ |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1125 | BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1126 | BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, |
| 1127 | generation, 64); |
| 1128 | BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1129 | BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, |
| 1130 | struct btrfs_super_block, sys_chunk_array_size, 32); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1131 | BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, |
| 1132 | root_level, 8); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1133 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, |
| 1134 | chunk_root, 64); |
| 1135 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, |
| 1136 | chunk_root_level, 64); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1137 | BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, |
| 1138 | total_bytes, 64); |
| 1139 | BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, |
| 1140 | bytes_used, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1141 | BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, |
| 1142 | sectorsize, 32); |
| 1143 | BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, |
| 1144 | nodesize, 32); |
| 1145 | BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, |
| 1146 | leafsize, 32); |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1147 | BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, |
| 1148 | stripesize, 32); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1149 | BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, |
| 1150 | root_dir_objectid, 64); |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 1151 | BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, |
| 1152 | num_devices, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1153 | |
| 1154 | static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) |
Chris Mason | 7f5c151 | 2007-03-23 15:56:19 -0400 | [diff] [blame] | 1155 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1156 | return offsetof(struct btrfs_leaf, items); |
Chris Mason | 7f5c151 | 2007-03-23 15:56:19 -0400 | [diff] [blame] | 1157 | } |
| 1158 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1159 | /* struct btrfs_file_extent_item */ |
| 1160 | BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); |
Chris Mason | 7f5c151 | 2007-03-23 15:56:19 -0400 | [diff] [blame] | 1161 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1162 | static inline unsigned long btrfs_file_extent_inline_start(struct |
Chris Mason | 236454df | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 1163 | btrfs_file_extent_item *e) |
| 1164 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1165 | unsigned long offset = (unsigned long)e; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1166 | offset += offsetof(struct btrfs_file_extent_item, disk_bytenr); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1167 | return offset; |
Chris Mason | 236454df | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 1168 | } |
| 1169 | |
| 1170 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) |
| 1171 | { |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1172 | return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize; |
Chris Mason | 236454df | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 1173 | } |
| 1174 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1175 | static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, |
| 1176 | struct btrfs_item *e) |
Chris Mason | 236454df | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 1177 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1178 | unsigned long offset; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1179 | offset = offsetof(struct btrfs_file_extent_item, disk_bytenr); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1180 | return btrfs_item_size(eb, e) - offset; |
Chris Mason | 236454df | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 1181 | } |
| 1182 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1183 | BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, |
| 1184 | disk_bytenr, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1185 | BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, |
| 1186 | generation, 64); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1187 | BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, |
| 1188 | disk_num_bytes, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1189 | BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, |
| 1190 | offset, 64); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1191 | BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, |
| 1192 | num_bytes, 64); |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 1193 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1194 | static inline struct btrfs_root *btrfs_sb(struct super_block *sb) |
| 1195 | { |
| 1196 | return sb->s_fs_info; |
| 1197 | } |
| 1198 | |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1199 | static inline int btrfs_set_root_name(struct btrfs_root *root, |
| 1200 | const char *name, int len) |
| 1201 | { |
| 1202 | /* if we already have a name just free it */ |
| 1203 | if (root->name) |
| 1204 | kfree(root->name); |
| 1205 | |
| 1206 | root->name = kmalloc(len+1, GFP_KERNEL); |
| 1207 | if (!root->name) |
| 1208 | return -ENOMEM; |
| 1209 | |
| 1210 | memcpy(root->name, name, len); |
| 1211 | root->name[len] ='\0'; |
| 1212 | |
| 1213 | return 0; |
| 1214 | } |
| 1215 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1216 | static inline u32 btrfs_level_size(struct btrfs_root *root, int level) { |
| 1217 | if (level == 0) |
| 1218 | return root->leafsize; |
| 1219 | return root->nodesize; |
| 1220 | } |
| 1221 | |
Chris Mason | 4beb1b8 | 2007-03-14 10:31:29 -0400 | [diff] [blame] | 1222 | /* helper function to cast into the data area of the leaf. */ |
| 1223 | #define btrfs_item_ptr(leaf, slot, type) \ |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 1224 | ((type *)(btrfs_leaf_data(leaf) + \ |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1225 | btrfs_item_offset_nr(leaf, slot))) |
| 1226 | |
| 1227 | #define btrfs_item_ptr_offset(leaf, slot) \ |
| 1228 | ((unsigned long)(btrfs_leaf_data(leaf) + \ |
| 1229 | btrfs_item_offset_nr(leaf, slot))) |
Chris Mason | 4beb1b8 | 2007-03-14 10:31:29 -0400 | [diff] [blame] | 1230 | |
Chris Mason | 6da6aba | 2007-12-18 16:15:09 -0500 | [diff] [blame] | 1231 | static inline struct dentry *fdentry(struct file *file) { |
| 1232 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18) |
| 1233 | return file->f_dentry; |
| 1234 | #else |
| 1235 | return file->f_path.dentry; |
| 1236 | #endif |
| 1237 | } |
| 1238 | |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 1239 | /* extent-tree.c */ |
Chris Mason | be20aa9 | 2007-12-17 20:14:01 -0500 | [diff] [blame] | 1240 | u32 btrfs_count_snapshots_in_path(struct btrfs_root *root, |
| 1241 | struct btrfs_path *count_path, |
| 1242 | u64 first_extent); |
Chris Mason | e9d0b13 | 2007-08-10 14:06:19 -0400 | [diff] [blame] | 1243 | int btrfs_extent_post_op(struct btrfs_trans_handle *trans, |
| 1244 | struct btrfs_root *root); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1245 | int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy); |
Chris Mason | 5276aed | 2007-06-11 21:33:38 -0400 | [diff] [blame] | 1246 | struct btrfs_block_group_cache *btrfs_lookup_block_group(struct |
| 1247 | btrfs_fs_info *info, |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1248 | u64 bytenr); |
Chris Mason | 31f3c99 | 2007-04-30 15:25:45 -0400 | [diff] [blame] | 1249 | struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root, |
| 1250 | struct btrfs_block_group_cache |
Chris Mason | be74417 | 2007-05-06 10:15:01 -0400 | [diff] [blame] | 1251 | *hint, u64 search_start, |
Chris Mason | de428b6 | 2007-05-18 13:28:27 -0400 | [diff] [blame] | 1252 | int data, int owner); |
Chris Mason | c5739bb | 2007-04-10 09:27:04 -0400 | [diff] [blame] | 1253 | int btrfs_inc_root_ref(struct btrfs_trans_handle *trans, |
Chris Mason | 7bb8631 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 1254 | struct btrfs_root *root, u64 owner_objectid); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1255 | struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1256 | struct btrfs_root *root, u32 size, |
Chris Mason | 7bb8631 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 1257 | u64 root_objectid, |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1258 | u64 hint, u64 empty_size); |
Chris Mason | 7bb8631 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 1259 | struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
| 1260 | struct btrfs_root *root, |
| 1261 | u32 blocksize, |
| 1262 | u64 root_objectid, |
| 1263 | u64 ref_generation, |
| 1264 | u64 first_objectid, |
| 1265 | int level, |
| 1266 | u64 hint, |
| 1267 | u64 empty_size); |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1268 | int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans, |
| 1269 | struct btrfs_root *root, u64 new_size); |
| 1270 | int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size); |
Chris Mason | 7bb8631 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 1271 | int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans, |
| 1272 | struct btrfs_root *root, |
| 1273 | struct btrfs_path *path, u64 bytenr, |
| 1274 | u64 root_objectid, u64 ref_generation, |
| 1275 | u64 owner, u64 owner_offset); |
Chris Mason | 4d77567 | 2007-04-20 20:23:12 -0400 | [diff] [blame] | 1276 | int btrfs_alloc_extent(struct btrfs_trans_handle *trans, |
Chris Mason | 7bb8631 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 1277 | struct btrfs_root *root, |
| 1278 | u64 num_bytes, u64 root_objectid, u64 ref_generation, |
| 1279 | u64 owner, u64 owner_offset, |
| 1280 | u64 empty_size, u64 hint_byte, |
Chris Mason | be08c1b | 2007-05-03 09:06:49 -0400 | [diff] [blame] | 1281 | u64 search_end, struct btrfs_key *ins, int data); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1282 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1283 | struct extent_buffer *buf); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1284 | int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root |
Chris Mason | 7bb8631 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 1285 | *root, u64 bytenr, u64 num_bytes, |
| 1286 | u64 root_objectid, u64 ref_generation, |
| 1287 | u64 owner_objectid, u64 owner_offset, int pin); |
Chris Mason | ccd467d | 2007-06-28 15:57:36 -0400 | [diff] [blame] | 1288 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, |
| 1289 | struct btrfs_root *root, |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1290 | struct extent_io_tree *unpin); |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 1291 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
| 1292 | struct btrfs_root *root, |
Chris Mason | 7bb8631 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 1293 | u64 bytenr, u64 num_bytes, |
| 1294 | u64 root_objectid, u64 ref_generation, |
| 1295 | u64 owner, u64 owner_offset); |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 1296 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, |
| 1297 | struct btrfs_root *root); |
| 1298 | int btrfs_free_block_groups(struct btrfs_fs_info *info); |
| 1299 | int btrfs_read_block_groups(struct btrfs_root *root); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1300 | int btrfs_make_block_group(struct btrfs_trans_handle *trans, |
| 1301 | struct btrfs_root *root, u64 bytes_used, |
| 1302 | u64 type, u64 chunk_tree, u64 chunk_objectid, |
| 1303 | u64 size); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1304 | /* ctree.c */ |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1305 | int btrfs_previous_item(struct btrfs_root *root, |
| 1306 | struct btrfs_path *path, u64 min_objectid, |
| 1307 | int type); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1308 | int btrfs_cow_block(struct btrfs_trans_handle *trans, |
| 1309 | struct btrfs_root *root, struct extent_buffer *buf, |
| 1310 | struct extent_buffer *parent, int parent_slot, |
| 1311 | struct extent_buffer **cow_ret); |
Chris Mason | be20aa9 | 2007-12-17 20:14:01 -0500 | [diff] [blame] | 1312 | int btrfs_copy_root(struct btrfs_trans_handle *trans, |
| 1313 | struct btrfs_root *root, |
| 1314 | struct extent_buffer *buf, |
| 1315 | struct extent_buffer **cow_ret, u64 new_root_objectid); |
Chris Mason | 6567e83 | 2007-04-16 09:22:45 -0400 | [diff] [blame] | 1316 | int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1317 | *root, struct btrfs_path *path, u32 data_size); |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 1318 | int btrfs_truncate_item(struct btrfs_trans_handle *trans, |
| 1319 | struct btrfs_root *root, |
| 1320 | struct btrfs_path *path, |
Chris Mason | 179e29e | 2007-11-01 11:28:41 -0400 | [diff] [blame] | 1321 | u32 new_size, int from_end); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1322 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1323 | *root, struct btrfs_key *key, struct btrfs_path *p, int |
| 1324 | ins_len, int cow); |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 1325 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1326 | struct btrfs_root *root, struct extent_buffer *parent, |
Chris Mason | a6b6e75 | 2007-10-15 16:22:39 -0400 | [diff] [blame] | 1327 | int start_slot, int cache_only, u64 *last_ret, |
| 1328 | struct btrfs_key *progress); |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 1329 | void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 1330 | struct btrfs_path *btrfs_alloc_path(void); |
| 1331 | void btrfs_free_path(struct btrfs_path *p); |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 1332 | void btrfs_init_path(struct btrfs_path *p); |
Chris Mason | 85e21ba | 2008-01-29 15:11:36 -0500 | [diff] [blame] | 1333 | int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 1334 | struct btrfs_path *path, int slot, int nr); |
| 1335 | |
| 1336 | static inline int btrfs_del_item(struct btrfs_trans_handle *trans, |
| 1337 | struct btrfs_root *root, |
| 1338 | struct btrfs_path *path) |
| 1339 | { |
| 1340 | return btrfs_del_items(trans, root, path, path->slots[0], 1); |
| 1341 | } |
| 1342 | |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1343 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1344 | *root, struct btrfs_key *key, void *data, u32 data_size); |
Chris Mason | 9c58309 | 2008-01-29 15:15:18 -0500 | [diff] [blame] | 1345 | int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, |
| 1346 | struct btrfs_root *root, |
| 1347 | struct btrfs_path *path, |
| 1348 | struct btrfs_key *cpu_key, u32 *data_size, int nr); |
| 1349 | |
| 1350 | static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, |
| 1351 | struct btrfs_root *root, |
| 1352 | struct btrfs_path *path, |
| 1353 | struct btrfs_key *key, |
| 1354 | u32 data_size) |
| 1355 | { |
| 1356 | return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); |
| 1357 | } |
| 1358 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 1359 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
Chris Mason | 7bb8631 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 1360 | int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1361 | int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1362 | int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root |
Chris Mason | 9f3a742 | 2007-08-07 15:52:19 -0400 | [diff] [blame] | 1363 | *root); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1364 | /* root-item.c */ |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1365 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 1366 | struct btrfs_key *key); |
| 1367 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1368 | *root, struct btrfs_key *key, struct btrfs_root_item |
| 1369 | *item); |
| 1370 | int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1371 | *root, struct btrfs_key *key, struct btrfs_root_item |
| 1372 | *item); |
| 1373 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct |
| 1374 | btrfs_root_item *item, struct btrfs_key *key); |
Chris Mason | 5ce14bb | 2007-09-11 11:15:39 -0400 | [diff] [blame] | 1375 | int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid, |
| 1376 | struct btrfs_root *latest_root); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1377 | /* dir-item.c */ |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 1378 | 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] | 1379 | *root, const char *name, int name_len, u64 dir, |
| 1380 | struct btrfs_key *location, u8 type); |
Chris Mason | 7e38180 | 2007-04-19 15:36:27 -0400 | [diff] [blame] | 1381 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
| 1382 | struct btrfs_root *root, |
| 1383 | struct btrfs_path *path, u64 dir, |
| 1384 | const char *name, int name_len, |
| 1385 | int mod); |
| 1386 | struct btrfs_dir_item * |
| 1387 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, |
| 1388 | struct btrfs_root *root, |
| 1389 | struct btrfs_path *path, u64 dir, |
| 1390 | u64 objectid, const char *name, int name_len, |
| 1391 | int mod); |
| 1392 | struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, |
| 1393 | struct btrfs_path *path, |
Chris Mason | 7f5c151 | 2007-03-23 15:56:19 -0400 | [diff] [blame] | 1394 | const char *name, int name_len); |
Chris Mason | 7e38180 | 2007-04-19 15:36:27 -0400 | [diff] [blame] | 1395 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
| 1396 | struct btrfs_root *root, |
| 1397 | struct btrfs_path *path, |
| 1398 | struct btrfs_dir_item *di); |
Josef Bacik | 5103e94 | 2007-11-16 11:45:54 -0500 | [diff] [blame] | 1399 | int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, |
| 1400 | struct btrfs_root *root, const char *name, |
| 1401 | u16 name_len, const void *data, u16 data_len, |
| 1402 | u64 dir); |
| 1403 | struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, |
| 1404 | struct btrfs_root *root, |
| 1405 | struct btrfs_path *path, u64 dir, |
| 1406 | const char *name, u16 name_len, |
| 1407 | int mod); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1408 | /* inode-map.c */ |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 1409 | int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, |
| 1410 | struct btrfs_root *fs_root, |
| 1411 | u64 dirid, u64 *objectid); |
Chris Mason | 5be6f7f | 2007-04-05 13:35:25 -0400 | [diff] [blame] | 1412 | int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); |
| 1413 | |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1414 | /* inode-item.c */ |
Chris Mason | 3954401 | 2007-12-12 14:38:19 -0500 | [diff] [blame] | 1415 | int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, |
| 1416 | struct btrfs_root *root, |
| 1417 | const char *name, int name_len, |
| 1418 | u64 inode_objectid, u64 ref_objectid); |
| 1419 | int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, |
| 1420 | struct btrfs_root *root, |
| 1421 | const char *name, int name_len, |
| 1422 | u64 inode_objectid, u64 ref_objectid); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1423 | int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, |
| 1424 | struct btrfs_root *root, |
| 1425 | struct btrfs_path *path, u64 objectid); |
Chris Mason | 293ffd5 | 2007-03-20 15:57:25 -0400 | [diff] [blame] | 1426 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 1427 | *root, struct btrfs_path *path, |
| 1428 | struct btrfs_key *location, int mod); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1429 | |
| 1430 | /* file-item.c */ |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 1431 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1432 | struct btrfs_root *root, |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 1433 | u64 objectid, u64 pos, u64 offset, |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1434 | u64 disk_num_bytes, |
| 1435 | u64 num_bytes); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 1436 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
| 1437 | struct btrfs_root *root, |
| 1438 | struct btrfs_path *path, u64 objectid, |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1439 | u64 bytenr, int mod); |
Chris Mason | 065631f | 2008-02-20 12:07:25 -0500 | [diff] [blame] | 1440 | int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, |
| 1441 | struct btrfs_root *root, struct inode *inode, |
| 1442 | struct bio *bio); |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 1443 | struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, |
| 1444 | struct btrfs_root *root, |
| 1445 | struct btrfs_path *path, |
| 1446 | u64 objectid, u64 offset, |
| 1447 | int cow); |
Chris Mason | 1de037a | 2007-05-29 15:17:08 -0400 | [diff] [blame] | 1448 | int btrfs_csum_truncate(struct btrfs_trans_handle *trans, |
| 1449 | struct btrfs_root *root, struct btrfs_path *path, |
| 1450 | u64 isize); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1451 | /* inode.c */ |
Chris Mason | 239b14b | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 1452 | int btrfs_merge_bio_hook(struct page *page, unsigned long offset, |
| 1453 | size_t size, struct bio *bio); |
| 1454 | |
Chris Mason | 9069218 | 2008-02-08 13:49:28 -0500 | [diff] [blame] | 1455 | static inline void dec_i_blocks(struct inode *inode, u64 dec) |
| 1456 | { |
| 1457 | dec = dec >> 9; |
| 1458 | if (dec <= inode->i_blocks) |
| 1459 | inode->i_blocks -= dec; |
| 1460 | else |
| 1461 | inode->i_blocks = 0; |
| 1462 | } |
| 1463 | |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1464 | unsigned long btrfs_force_ra(struct address_space *mapping, |
| 1465 | struct file_ra_state *ra, struct file *file, |
| 1466 | pgoff_t offset, pgoff_t last_index); |
Chris Mason | 1832a6d | 2007-12-21 16:27:21 -0500 | [diff] [blame] | 1467 | int btrfs_check_free_space(struct btrfs_root *root, u64 num_required, |
| 1468 | int for_del); |
Chris Mason | 9ebefb18 | 2007-06-15 13:50:00 -0400 | [diff] [blame] | 1469 | int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page); |
| 1470 | int btrfs_readpage(struct file *file, struct page *page); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1471 | void btrfs_delete_inode(struct inode *inode); |
Chris Mason | 2da98f0 | 2008-01-16 11:44:43 -0500 | [diff] [blame] | 1472 | void btrfs_put_inode(struct inode *inode); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1473 | void btrfs_read_locked_inode(struct inode *inode); |
| 1474 | int btrfs_write_inode(struct inode *inode, int wait); |
| 1475 | void btrfs_dirty_inode(struct inode *inode); |
| 1476 | struct inode *btrfs_alloc_inode(struct super_block *sb); |
| 1477 | void btrfs_destroy_inode(struct inode *inode); |
| 1478 | int btrfs_init_cachep(void); |
| 1479 | void btrfs_destroy_cachep(void); |
Christoph Hellwig | 34287aa | 2007-09-14 10:22:47 -0400 | [diff] [blame] | 1480 | long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1481 | struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid, |
| 1482 | struct btrfs_root *root); |
Chris Mason | dc17ff8 | 2008-01-08 15:46:30 -0500 | [diff] [blame] | 1483 | struct inode *btrfs_ilookup(struct super_block *s, u64 objectid, |
| 1484 | u64 root_objectid); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1485 | int btrfs_commit_write(struct file *file, struct page *page, |
| 1486 | unsigned from, unsigned to); |
Chris Mason | a52d9a8 | 2007-08-27 16:49:44 -0400 | [diff] [blame] | 1487 | struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, |
| 1488 | size_t page_offset, u64 start, u64 end, |
| 1489 | int create); |
| 1490 | int btrfs_update_inode(struct btrfs_trans_handle *trans, |
| 1491 | struct btrfs_root *root, |
| 1492 | struct inode *inode); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1493 | /* file.c */ |
Chris Mason | a52d9a8 | 2007-08-27 16:49:44 -0400 | [diff] [blame] | 1494 | int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end); |
Chris Mason | 5f56406 | 2008-01-22 16:47:59 -0500 | [diff] [blame] | 1495 | int btrfs_check_file(struct btrfs_root *root, struct inode *inode); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 1496 | extern struct file_operations btrfs_file_operations; |
| 1497 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, |
| 1498 | struct btrfs_root *root, struct inode *inode, |
Chris Mason | 00f5c79 | 2007-11-30 10:09:33 -0500 | [diff] [blame] | 1499 | u64 start, u64 end, u64 inline_limit, u64 *hint_block); |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 1500 | /* tree-defrag.c */ |
| 1501 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, |
| 1502 | struct btrfs_root *root, int cache_only); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1503 | |
| 1504 | /* sysfs.c */ |
| 1505 | int btrfs_init_sysfs(void); |
| 1506 | void btrfs_exit_sysfs(void); |
| 1507 | int btrfs_sysfs_add_super(struct btrfs_fs_info *fs); |
| 1508 | int btrfs_sysfs_add_root(struct btrfs_root *root); |
| 1509 | void btrfs_sysfs_del_root(struct btrfs_root *root); |
| 1510 | void btrfs_sysfs_del_super(struct btrfs_fs_info *root); |
| 1511 | |
Josef Bacik | 5103e94 | 2007-11-16 11:45:54 -0500 | [diff] [blame] | 1512 | /* xattr.c */ |
| 1513 | ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); |
| 1514 | int btrfs_delete_xattrs(struct btrfs_trans_handle *trans, |
| 1515 | struct btrfs_root *root, struct inode *inode); |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 1516 | /* super.c */ |
| 1517 | u64 btrfs_parse_size(char *str); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 1518 | #endif |