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 | 810191f | 2007-10-15 16:18:55 -0400 | [diff] [blame] | 22 | #include <linux/mm.h> |
| 23 | #include <linux/highmem.h> |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 24 | #include <linux/fs.h> |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 25 | #include <linux/rwsem.h> |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 26 | #include <linux/completion.h> |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 27 | #include <linux/backing-dev.h> |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 28 | #include <linux/wait.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 29 | #include <linux/slab.h> |
Stefan Schmidt | f8b1808 | 2011-01-12 10:30:42 +0100 | [diff] [blame] | 30 | #include <linux/kobject.h> |
liubo | 1abe9b8 | 2011-03-24 11:18:59 +0000 | [diff] [blame] | 31 | #include <trace/events/btrfs.h> |
Chris Mason | 479965d | 2007-10-15 16:14:27 -0400 | [diff] [blame] | 32 | #include <asm/kmap_types.h> |
Josef Bacik | 3b16a4e | 2011-09-21 15:05:58 -0400 | [diff] [blame] | 33 | #include <linux/pagemap.h> |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 34 | #include "extent_io.h" |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 35 | #include "extent_map.h" |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 36 | #include "async-thread.h" |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 37 | #include "ioctl.h" |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 38 | |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 39 | struct btrfs_trans_handle; |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 40 | struct btrfs_transaction; |
Yan, Zheng | a22285a | 2010-05-16 10:48:46 -0400 | [diff] [blame] | 41 | struct btrfs_pending_snapshot; |
Chris Mason | 35b7e47 | 2007-05-02 15:53:43 -0400 | [diff] [blame] | 42 | extern struct kmem_cache *btrfs_trans_handle_cachep; |
| 43 | extern struct kmem_cache *btrfs_transaction_cachep; |
| 44 | extern struct kmem_cache *btrfs_bit_radix_cachep; |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 45 | extern struct kmem_cache *btrfs_path_cachep; |
Josef Bacik | dc89e98 | 2011-01-28 17:05:48 -0500 | [diff] [blame] | 46 | extern struct kmem_cache *btrfs_free_space_cachep; |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 47 | struct btrfs_ordered_sum; |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 48 | |
Chris Mason | 2a7108a | 2008-12-02 09:58:02 -0500 | [diff] [blame] | 49 | #define BTRFS_MAGIC "_BHRfS_M" |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 50 | |
Stefan Behrens | 94598ba | 2012-03-27 14:21:26 -0400 | [diff] [blame] | 51 | #define BTRFS_MAX_MIRRORS 2 |
| 52 | |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 53 | #define BTRFS_MAX_LEVEL 8 |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 54 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 55 | #define BTRFS_COMPAT_EXTENT_TREE_V0 |
| 56 | |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 57 | /* |
| 58 | * files bigger than this get some pre-flushing when they are added |
| 59 | * to the ordered operations list. That way we limit the total |
| 60 | * work done by the commit |
| 61 | */ |
| 62 | #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024) |
| 63 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 64 | /* holds pointers to all of the tree roots */ |
Chris Mason | 6407bf6 | 2007-03-27 06:33:00 -0400 | [diff] [blame] | 65 | #define BTRFS_ROOT_TREE_OBJECTID 1ULL |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 66 | |
| 67 | /* stores information about which extents are in use, and reference counts */ |
Chris Mason | 0cf6c62 | 2007-06-09 09:22:25 -0400 | [diff] [blame] | 68 | #define BTRFS_EXTENT_TREE_OBJECTID 2ULL |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 69 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 70 | /* |
| 71 | * chunk tree stores translations from logical -> physical block numbering |
| 72 | * the super block points to the chunk tree |
| 73 | */ |
Chris Mason | e085def | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 74 | #define BTRFS_CHUNK_TREE_OBJECTID 3ULL |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 75 | |
| 76 | /* |
| 77 | * stores information about which areas of a given device are in use. |
| 78 | * one per device. The tree of tree roots points to the device tree |
| 79 | */ |
Chris Mason | e085def | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 80 | #define BTRFS_DEV_TREE_OBJECTID 4ULL |
| 81 | |
| 82 | /* one per subvolume, storing files and directories */ |
| 83 | #define BTRFS_FS_TREE_OBJECTID 5ULL |
| 84 | |
| 85 | /* directory objectid inside the root tree */ |
| 86 | #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 87 | |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 88 | /* holds checksums of all the data extents */ |
| 89 | #define BTRFS_CSUM_TREE_OBJECTID 7ULL |
| 90 | |
Ilya Dryomov | 0940ebf | 2012-01-16 22:04:48 +0200 | [diff] [blame] | 91 | /* for storing balance parameters in the root tree */ |
| 92 | #define BTRFS_BALANCE_OBJECTID -4ULL |
| 93 | |
Josef Bacik | 7b12876 | 2008-07-24 12:17:14 -0400 | [diff] [blame] | 94 | /* orhpan objectid for tracking unlinked/truncated files */ |
| 95 | #define BTRFS_ORPHAN_OBJECTID -5ULL |
| 96 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 97 | /* does write ahead logging to speed up fsyncs */ |
| 98 | #define BTRFS_TREE_LOG_OBJECTID -6ULL |
| 99 | #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL |
| 100 | |
Zheng Yan | e465768 | 2008-09-26 10:04:53 -0400 | [diff] [blame] | 101 | /* for space balancing */ |
| 102 | #define BTRFS_TREE_RELOC_OBJECTID -8ULL |
| 103 | #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL |
| 104 | |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 105 | /* |
| 106 | * extent checksums all have this objectid |
| 107 | * this allows them to share the logging tree |
| 108 | * for fsyncs |
| 109 | */ |
| 110 | #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL |
| 111 | |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 112 | /* For storing free space cache */ |
| 113 | #define BTRFS_FREE_SPACE_OBJECTID -11ULL |
| 114 | |
Li Zefan | 82d5902 | 2011-04-20 10:33:24 +0800 | [diff] [blame] | 115 | /* |
| 116 | * The inode number assigned to the special inode for sotring |
| 117 | * free ino cache |
| 118 | */ |
| 119 | #define BTRFS_FREE_INO_OBJECTID -12ULL |
| 120 | |
Zheng Yan | 31840ae | 2008-09-23 13:14:14 -0400 | [diff] [blame] | 121 | /* dummy objectid represents multiple objectids */ |
| 122 | #define BTRFS_MULTIPLE_OBJECTIDS -255ULL |
| 123 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 124 | /* |
Zheng Yan | 6527cdb | 2008-09-05 16:43:53 -0400 | [diff] [blame] | 125 | * All files have objectids in this range. |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 126 | */ |
Chris Mason | f6dbff5 | 2007-12-13 11:13:32 -0500 | [diff] [blame] | 127 | #define BTRFS_FIRST_FREE_OBJECTID 256ULL |
Zheng Yan | 6527cdb | 2008-09-05 16:43:53 -0400 | [diff] [blame] | 128 | #define BTRFS_LAST_FREE_OBJECTID -256ULL |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 129 | #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 130 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 131 | |
| 132 | /* |
| 133 | * the device items go into the chunk tree. The key is in the form |
| 134 | * [ 1 BTRFS_DEV_ITEM_KEY device_id ] |
| 135 | */ |
| 136 | #define BTRFS_DEV_ITEMS_OBJECTID 1ULL |
| 137 | |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 138 | #define BTRFS_BTREE_INODE_OBJECTID 1 |
| 139 | |
| 140 | #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2 |
| 141 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 142 | /* |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 143 | * the max metadata block size. This limit is somewhat artificial, |
| 144 | * but the memmove costs go through the roof for larger blocks. |
| 145 | */ |
| 146 | #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 |
| 147 | |
| 148 | /* |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 149 | * we can actually store much bigger names, but lets not confuse the rest |
| 150 | * of linux |
| 151 | */ |
| 152 | #define BTRFS_NAME_LEN 255 |
| 153 | |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 154 | /* 32 bytes in various csum fields */ |
| 155 | #define BTRFS_CSUM_SIZE 32 |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 156 | |
| 157 | /* csum types */ |
| 158 | #define BTRFS_CSUM_TYPE_CRC32 0 |
| 159 | |
| 160 | static int btrfs_csum_sizes[] = { 4, 0 }; |
| 161 | |
Chris Mason | 509659c | 2007-05-10 12:36:17 -0400 | [diff] [blame] | 162 | /* four bytes for CRC32 */ |
Chris Mason | 3954401 | 2007-12-12 14:38:19 -0500 | [diff] [blame] | 163 | #define BTRFS_EMPTY_DIR_SIZE 0 |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 164 | |
Chris Mason | fabb568 | 2007-06-07 22:13:21 -0400 | [diff] [blame] | 165 | #define BTRFS_FT_UNKNOWN 0 |
| 166 | #define BTRFS_FT_REG_FILE 1 |
| 167 | #define BTRFS_FT_DIR 2 |
| 168 | #define BTRFS_FT_CHRDEV 3 |
| 169 | #define BTRFS_FT_BLKDEV 4 |
| 170 | #define BTRFS_FT_FIFO 5 |
| 171 | #define BTRFS_FT_SOCK 6 |
| 172 | #define BTRFS_FT_SYMLINK 7 |
Josef Bacik | 5103e94 | 2007-11-16 11:45:54 -0500 | [diff] [blame] | 173 | #define BTRFS_FT_XATTR 8 |
| 174 | #define BTRFS_FT_MAX 9 |
Chris Mason | fabb568 | 2007-06-07 22:13:21 -0400 | [diff] [blame] | 175 | |
Stefan Behrens | 3d136a1 | 2012-02-03 11:20:04 +0100 | [diff] [blame] | 176 | /* ioprio of readahead is set to idle */ |
| 177 | #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) |
| 178 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 179 | /* |
Wu Fengguang | d4a7894 | 2009-04-02 16:46:06 -0400 | [diff] [blame] | 180 | * The key defines the order in the tree, and so it also defines (optimal) |
| 181 | * block layout. |
| 182 | * |
| 183 | * objectid corresponds to the inode number. |
| 184 | * |
| 185 | * type tells us things about the object, and is a kind of stream selector. |
| 186 | * so for a given inode, keys with type of 1 might refer to the inode data, |
| 187 | * type of 2 may point to file data in the btree and type == 3 may point to |
| 188 | * extents. |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 189 | * |
| 190 | * offset is the starting byte offset for this key in the stream. |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 191 | * |
| 192 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always |
| 193 | * in cpu native order. Otherwise they are identical and their sizes |
| 194 | * should be the same (ie both packed) |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 195 | */ |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 196 | struct btrfs_disk_key { |
| 197 | __le64 objectid; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 198 | u8 type; |
Chris Mason | 70b2bef | 2007-04-17 15:39:32 -0400 | [diff] [blame] | 199 | __le64 offset; |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 200 | } __attribute__ ((__packed__)); |
| 201 | |
| 202 | struct btrfs_key { |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 203 | u64 objectid; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 204 | u8 type; |
Chris Mason | 70b2bef | 2007-04-17 15:39:32 -0400 | [diff] [blame] | 205 | u64 offset; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 206 | } __attribute__ ((__packed__)); |
| 207 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 208 | struct btrfs_mapping_tree { |
| 209 | struct extent_map_tree map_tree; |
| 210 | }; |
| 211 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 212 | struct btrfs_dev_item { |
| 213 | /* the internal btrfs device id */ |
| 214 | __le64 devid; |
| 215 | |
| 216 | /* size of the device */ |
| 217 | __le64 total_bytes; |
| 218 | |
| 219 | /* bytes used */ |
| 220 | __le64 bytes_used; |
| 221 | |
| 222 | /* optimal io alignment for this device */ |
| 223 | __le32 io_align; |
| 224 | |
| 225 | /* optimal io width for this device */ |
| 226 | __le32 io_width; |
| 227 | |
| 228 | /* minimal io size for this device */ |
| 229 | __le32 sector_size; |
| 230 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 231 | /* type and info about this device */ |
| 232 | __le64 type; |
| 233 | |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 234 | /* expected generation for this device */ |
| 235 | __le64 generation; |
| 236 | |
Chris Mason | c3027eb | 2008-12-08 16:40:21 -0500 | [diff] [blame] | 237 | /* |
| 238 | * starting byte of this partition on the device, |
Wu Fengguang | d4a7894 | 2009-04-02 16:46:06 -0400 | [diff] [blame] | 239 | * to allow for stripe alignment in the future |
Chris Mason | c3027eb | 2008-12-08 16:40:21 -0500 | [diff] [blame] | 240 | */ |
| 241 | __le64 start_offset; |
| 242 | |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 243 | /* grouping information for allocation decisions */ |
| 244 | __le32 dev_group; |
| 245 | |
| 246 | /* seek speed 0-100 where 100 is fastest */ |
| 247 | u8 seek_speed; |
| 248 | |
| 249 | /* bandwidth 0-100 where 100 is fastest */ |
| 250 | u8 bandwidth; |
| 251 | |
Chris Mason | 0d81ba5 | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 252 | /* btrfs generated uuid for this device */ |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 253 | u8 uuid[BTRFS_UUID_SIZE]; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 254 | |
| 255 | /* uuid of FS who owns this device */ |
| 256 | u8 fsid[BTRFS_UUID_SIZE]; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 257 | } __attribute__ ((__packed__)); |
| 258 | |
| 259 | struct btrfs_stripe { |
| 260 | __le64 devid; |
| 261 | __le64 offset; |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 262 | u8 dev_uuid[BTRFS_UUID_SIZE]; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 263 | } __attribute__ ((__packed__)); |
| 264 | |
| 265 | struct btrfs_chunk { |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 266 | /* size of this chunk in bytes */ |
| 267 | __le64 length; |
| 268 | |
| 269 | /* objectid of the root referencing this chunk */ |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 270 | __le64 owner; |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 271 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 272 | __le64 stripe_len; |
| 273 | __le64 type; |
| 274 | |
| 275 | /* optimal io alignment for this chunk */ |
| 276 | __le32 io_align; |
| 277 | |
| 278 | /* optimal io width for this chunk */ |
| 279 | __le32 io_width; |
| 280 | |
| 281 | /* minimal io size for this chunk */ |
| 282 | __le32 sector_size; |
| 283 | |
| 284 | /* 2^16 stripes is quite a lot, a second limit is the size of a single |
| 285 | * item in the btree |
| 286 | */ |
| 287 | __le16 num_stripes; |
Chris Mason | 321aecc | 2008-04-16 10:49:51 -0400 | [diff] [blame] | 288 | |
| 289 | /* sub stripes only matter for raid10 */ |
| 290 | __le16 sub_stripes; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 291 | struct btrfs_stripe stripe; |
| 292 | /* additional stripes go here */ |
| 293 | } __attribute__ ((__packed__)); |
| 294 | |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 295 | #define BTRFS_FREE_SPACE_EXTENT 1 |
| 296 | #define BTRFS_FREE_SPACE_BITMAP 2 |
| 297 | |
| 298 | struct btrfs_free_space_entry { |
| 299 | __le64 offset; |
| 300 | __le64 bytes; |
| 301 | u8 type; |
| 302 | } __attribute__ ((__packed__)); |
| 303 | |
| 304 | struct btrfs_free_space_header { |
| 305 | struct btrfs_disk_key location; |
| 306 | __le64 generation; |
| 307 | __le64 num_entries; |
| 308 | __le64 num_bitmaps; |
| 309 | } __attribute__ ((__packed__)); |
| 310 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 311 | static inline unsigned long btrfs_chunk_item_size(int num_stripes) |
| 312 | { |
| 313 | BUG_ON(num_stripes == 0); |
| 314 | return sizeof(struct btrfs_chunk) + |
| 315 | sizeof(struct btrfs_stripe) * (num_stripes - 1); |
| 316 | } |
| 317 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 318 | #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0) |
| 319 | #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 320 | |
| 321 | /* |
| 322 | * File system states |
| 323 | */ |
| 324 | |
| 325 | /* Errors detected */ |
| 326 | #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2) |
| 327 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 328 | #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32) |
| 329 | #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33) |
| 330 | |
| 331 | #define BTRFS_BACKREF_REV_MAX 256 |
| 332 | #define BTRFS_BACKREF_REV_SHIFT 56 |
| 333 | #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ |
| 334 | BTRFS_BACKREF_REV_SHIFT) |
| 335 | |
| 336 | #define BTRFS_OLD_BACKREF_REV 0 |
| 337 | #define BTRFS_MIXED_BACKREF_REV 1 |
Chris Mason | 63b10fc | 2008-04-01 11:21:32 -0400 | [diff] [blame] | 338 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 339 | /* |
| 340 | * every tree block (leaf or node) starts with this header. |
| 341 | */ |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 342 | struct btrfs_header { |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 343 | /* these first four must match the super block */ |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 344 | u8 csum[BTRFS_CSUM_SIZE]; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 345 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 346 | __le64 bytenr; /* which block this node is supposed to live in */ |
Chris Mason | 63b10fc | 2008-04-01 11:21:32 -0400 | [diff] [blame] | 347 | __le64 flags; |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 348 | |
| 349 | /* allowed to be different from the super from here on down */ |
| 350 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
Chris Mason | 7f5c151 | 2007-03-23 15:56:19 -0400 | [diff] [blame] | 351 | __le64 generation; |
Chris Mason | 4d77567 | 2007-04-20 20:23:12 -0400 | [diff] [blame] | 352 | __le64 owner; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 353 | __le32 nritems; |
Chris Mason | 9a6f11e | 2007-03-27 09:06:38 -0400 | [diff] [blame] | 354 | u8 level; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 355 | } __attribute__ ((__packed__)); |
| 356 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 357 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 358 | sizeof(struct btrfs_header)) / \ |
| 359 | sizeof(struct btrfs_key_ptr)) |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 360 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 361 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) |
Chris Mason | 236454d | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 362 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
| 363 | sizeof(struct btrfs_item) - \ |
| 364 | sizeof(struct btrfs_file_extent_item)) |
Yan, Zheng | f34f57a | 2009-11-12 09:35:27 +0000 | [diff] [blame] | 365 | #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
| 366 | sizeof(struct btrfs_item) -\ |
| 367 | sizeof(struct btrfs_dir_item)) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 368 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 369 | |
| 370 | /* |
| 371 | * this is a very generous portion of the super block, giving us |
| 372 | * room to translate 14 chunks with 3 stripes each. |
| 373 | */ |
| 374 | #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 |
Chris Mason | 7ae9c09 | 2008-04-18 10:29:49 -0400 | [diff] [blame] | 375 | #define BTRFS_LABEL_SIZE 256 |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 376 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 377 | /* |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 378 | * just in case we somehow lose the roots and are not able to mount, |
| 379 | * we store an array of the roots from previous transactions |
| 380 | * in the super. |
| 381 | */ |
| 382 | #define BTRFS_NUM_BACKUP_ROOTS 4 |
| 383 | struct btrfs_root_backup { |
| 384 | __le64 tree_root; |
| 385 | __le64 tree_root_gen; |
| 386 | |
| 387 | __le64 chunk_root; |
| 388 | __le64 chunk_root_gen; |
| 389 | |
| 390 | __le64 extent_root; |
| 391 | __le64 extent_root_gen; |
| 392 | |
| 393 | __le64 fs_root; |
| 394 | __le64 fs_root_gen; |
| 395 | |
| 396 | __le64 dev_root; |
| 397 | __le64 dev_root_gen; |
| 398 | |
| 399 | __le64 csum_root; |
| 400 | __le64 csum_root_gen; |
| 401 | |
| 402 | __le64 total_bytes; |
| 403 | __le64 bytes_used; |
| 404 | __le64 num_devices; |
| 405 | /* future */ |
| 406 | __le64 unsed_64[4]; |
| 407 | |
| 408 | u8 tree_root_level; |
| 409 | u8 chunk_root_level; |
| 410 | u8 extent_root_level; |
| 411 | u8 fs_root_level; |
| 412 | u8 dev_root_level; |
| 413 | u8 csum_root_level; |
| 414 | /* future and to align */ |
| 415 | u8 unused_8[10]; |
| 416 | } __attribute__ ((__packed__)); |
| 417 | |
| 418 | /* |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 419 | * the super block basically lists the main trees of the FS |
| 420 | * it currently lacks any block count etc etc |
| 421 | */ |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 422 | struct btrfs_super_block { |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 423 | u8 csum[BTRFS_CSUM_SIZE]; |
Chris Mason | 63b10fc | 2008-04-01 11:21:32 -0400 | [diff] [blame] | 424 | /* the first 4 fields must match struct btrfs_header */ |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 425 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 426 | __le64 bytenr; /* this block number */ |
Chris Mason | 63b10fc | 2008-04-01 11:21:32 -0400 | [diff] [blame] | 427 | __le64 flags; |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 428 | |
| 429 | /* allowed to be different from the btrfs_header from here own down */ |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 430 | __le64 magic; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 431 | __le64 generation; |
| 432 | __le64 root; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 433 | __le64 chunk_root; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 434 | __le64 log_root; |
Chris Mason | c3027eb | 2008-12-08 16:40:21 -0500 | [diff] [blame] | 435 | |
| 436 | /* this will help find the new super based on the log root */ |
| 437 | __le64 log_root_transid; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 438 | __le64 total_bytes; |
| 439 | __le64 bytes_used; |
Chris Mason | 2e635a2 | 2007-03-21 11:12:56 -0400 | [diff] [blame] | 440 | __le64 root_dir_objectid; |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 441 | __le64 num_devices; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 442 | __le32 sectorsize; |
| 443 | __le32 nodesize; |
| 444 | __le32 leafsize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 445 | __le32 stripesize; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 446 | __le32 sys_chunk_array_size; |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 447 | __le64 chunk_root_generation; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 448 | __le64 compat_flags; |
| 449 | __le64 compat_ro_flags; |
| 450 | __le64 incompat_flags; |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 451 | __le16 csum_type; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 452 | u8 root_level; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 453 | u8 chunk_root_level; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 454 | u8 log_root_level; |
Chris Mason | 0d81ba5 | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 455 | struct btrfs_dev_item dev_item; |
Chris Mason | c3027eb | 2008-12-08 16:40:21 -0500 | [diff] [blame] | 456 | |
Chris Mason | 7ae9c09 | 2008-04-18 10:29:49 -0400 | [diff] [blame] | 457 | char label[BTRFS_LABEL_SIZE]; |
Chris Mason | c3027eb | 2008-12-08 16:40:21 -0500 | [diff] [blame] | 458 | |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 459 | __le64 cache_generation; |
| 460 | |
Chris Mason | c3027eb | 2008-12-08 16:40:21 -0500 | [diff] [blame] | 461 | /* future expansion */ |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 462 | __le64 reserved[31]; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 463 | u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 464 | struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 465 | } __attribute__ ((__packed__)); |
| 466 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 467 | /* |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 468 | * Compat flags that we support. If any incompat flags are set other than the |
| 469 | * ones specified below then we will fail to mount |
| 470 | */ |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 471 | #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0) |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 472 | #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1) |
Josef Bacik | 6737773 | 2010-09-16 16:19:09 -0400 | [diff] [blame] | 473 | #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2) |
Li Zefan | a6fa6fa | 2010-10-25 15:12:26 +0800 | [diff] [blame] | 474 | #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3) |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 475 | /* |
| 476 | * some patches floated around with a second compression method |
| 477 | * lets save that incompat here for when they do get in |
| 478 | * Note we don't actually support it, we're just reserving the |
| 479 | * number |
| 480 | */ |
| 481 | #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4) |
| 482 | |
| 483 | /* |
| 484 | * older kernels tried to do bigger metadata blocks, but the |
| 485 | * code was pretty buggy. Lets not let them try anymore. |
| 486 | */ |
| 487 | #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5) |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 488 | |
| 489 | #define BTRFS_FEATURE_COMPAT_SUPP 0ULL |
| 490 | #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 491 | #define BTRFS_FEATURE_INCOMPAT_SUPP \ |
| 492 | (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ |
Josef Bacik | 6737773 | 2010-09-16 16:19:09 -0400 | [diff] [blame] | 493 | BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ |
Li Zefan | a6fa6fa | 2010-10-25 15:12:26 +0800 | [diff] [blame] | 494 | BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 495 | BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ |
Li Zefan | a6fa6fa | 2010-10-25 15:12:26 +0800 | [diff] [blame] | 496 | BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO) |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 497 | |
| 498 | /* |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 499 | * 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] | 500 | * the item in the leaf (relative to the start of the data area) |
| 501 | */ |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 502 | struct btrfs_item { |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 503 | struct btrfs_disk_key key; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 504 | __le32 offset; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 505 | __le32 size; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 506 | } __attribute__ ((__packed__)); |
| 507 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 508 | /* |
| 509 | * leaves have an item area and a data area: |
| 510 | * [item0, item1....itemN] [free space] [dataN...data1, data0] |
| 511 | * |
| 512 | * The data is separate from the items to get the keys closer together |
| 513 | * during searches. |
| 514 | */ |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 515 | struct btrfs_leaf { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 516 | struct btrfs_header header; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 517 | struct btrfs_item items[]; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 518 | } __attribute__ ((__packed__)); |
| 519 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 520 | /* |
| 521 | * all non-leaf blocks are nodes, they hold only keys and pointers to |
| 522 | * other blocks |
| 523 | */ |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 524 | struct btrfs_key_ptr { |
| 525 | struct btrfs_disk_key key; |
| 526 | __le64 blockptr; |
Chris Mason | 74493f7 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 527 | __le64 generation; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 528 | } __attribute__ ((__packed__)); |
| 529 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 530 | struct btrfs_node { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 531 | struct btrfs_header header; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 532 | struct btrfs_key_ptr ptrs[]; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 533 | } __attribute__ ((__packed__)); |
| 534 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 535 | /* |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 536 | * btrfs_paths remember the path taken from the root down to the leaf. |
| 537 | * 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] | 538 | * to any other levels that are present. |
| 539 | * |
| 540 | * The slots array records the index of the item or block pointer |
| 541 | * used while walking the tree. |
| 542 | */ |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 543 | struct btrfs_path { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 544 | struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 545 | int slots[BTRFS_MAX_LEVEL]; |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 546 | /* if there is real range locking, this locks field will change */ |
| 547 | int locks[BTRFS_MAX_LEVEL]; |
Chris Mason | 3c69fae | 2007-08-07 15:52:22 -0400 | [diff] [blame] | 548 | int reada; |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 549 | /* keep some upper locks as we walk down */ |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 550 | int lowest_level; |
Chris Mason | 459931e | 2008-12-10 09:10:46 -0500 | [diff] [blame] | 551 | |
| 552 | /* |
| 553 | * set by btrfs_split_item, tells search_slot to keep all locks |
| 554 | * and to force calls to keep space in the nodes |
| 555 | */ |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 556 | unsigned int search_for_split:1; |
| 557 | unsigned int keep_locks:1; |
| 558 | unsigned int skip_locking:1; |
| 559 | unsigned int leave_spinning:1; |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 560 | unsigned int search_commit_root:1; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 561 | }; |
Chris Mason | 5de08d7 | 2007-02-24 06:24:44 -0500 | [diff] [blame] | 562 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 563 | /* |
| 564 | * items in the extent btree are used to record the objectid of the |
| 565 | * owner of the block and the number of references |
| 566 | */ |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 567 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 568 | struct btrfs_extent_item { |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 569 | __le64 refs; |
| 570 | __le64 generation; |
| 571 | __le64 flags; |
| 572 | } __attribute__ ((__packed__)); |
| 573 | |
| 574 | struct btrfs_extent_item_v0 { |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 575 | __le32 refs; |
Chris Mason | 74493f7 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 576 | } __attribute__ ((__packed__)); |
| 577 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 578 | #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \ |
| 579 | sizeof(struct btrfs_item)) |
| 580 | |
| 581 | #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0) |
| 582 | #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1) |
| 583 | |
| 584 | /* following flags only apply to tree blocks */ |
| 585 | |
| 586 | /* use full backrefs for extent pointers in the block */ |
| 587 | #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8) |
| 588 | |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 589 | /* |
| 590 | * this flag is only used internally by scrub and may be changed at any time |
| 591 | * it is only declared here to avoid collisions |
| 592 | */ |
| 593 | #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48) |
| 594 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 595 | struct btrfs_tree_block_info { |
| 596 | struct btrfs_disk_key key; |
| 597 | u8 level; |
| 598 | } __attribute__ ((__packed__)); |
| 599 | |
| 600 | struct btrfs_extent_data_ref { |
| 601 | __le64 root; |
| 602 | __le64 objectid; |
| 603 | __le64 offset; |
| 604 | __le32 count; |
| 605 | } __attribute__ ((__packed__)); |
| 606 | |
| 607 | struct btrfs_shared_data_ref { |
| 608 | __le32 count; |
| 609 | } __attribute__ ((__packed__)); |
| 610 | |
| 611 | struct btrfs_extent_inline_ref { |
| 612 | u8 type; |
Yan Zheng | 1bec1ae | 2009-07-22 09:59:00 -0400 | [diff] [blame] | 613 | __le64 offset; |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 614 | } __attribute__ ((__packed__)); |
| 615 | |
| 616 | /* old style backrefs item */ |
| 617 | struct btrfs_extent_ref_v0 { |
Chris Mason | 74493f7 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 618 | __le64 root; |
| 619 | __le64 generation; |
| 620 | __le64 objectid; |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 621 | __le32 count; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 622 | } __attribute__ ((__packed__)); |
| 623 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 624 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 625 | /* dev extents record free space on individual devices. The owner |
| 626 | * field points back to the chunk allocation mapping tree that allocated |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 627 | * the extent. The chunk tree uuid field is a way to double check the owner |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 628 | */ |
| 629 | struct btrfs_dev_extent { |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 630 | __le64 chunk_tree; |
| 631 | __le64 chunk_objectid; |
| 632 | __le64 chunk_offset; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 633 | __le64 length; |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 634 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 635 | } __attribute__ ((__packed__)); |
| 636 | |
Chris Mason | 3954401 | 2007-12-12 14:38:19 -0500 | [diff] [blame] | 637 | struct btrfs_inode_ref { |
Josef Bacik | aec7477 | 2008-07-24 12:12:38 -0400 | [diff] [blame] | 638 | __le64 index; |
Chris Mason | 3954401 | 2007-12-12 14:38:19 -0500 | [diff] [blame] | 639 | __le16 name_len; |
| 640 | /* name goes here */ |
| 641 | } __attribute__ ((__packed__)); |
| 642 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 643 | struct btrfs_timespec { |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 644 | __le64 sec; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 645 | __le32 nsec; |
| 646 | } __attribute__ ((__packed__)); |
| 647 | |
Jan Engelhardt | 95029d7 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 648 | enum btrfs_compression_type { |
Li Zefan | 261507a0 | 2010-12-17 14:21:50 +0800 | [diff] [blame] | 649 | BTRFS_COMPRESS_NONE = 0, |
| 650 | BTRFS_COMPRESS_ZLIB = 1, |
Li Zefan | a6fa6fa | 2010-10-25 15:12:26 +0800 | [diff] [blame] | 651 | BTRFS_COMPRESS_LZO = 2, |
| 652 | BTRFS_COMPRESS_TYPES = 2, |
| 653 | BTRFS_COMPRESS_LAST = 3, |
Jan Engelhardt | 95029d7 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 654 | }; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 655 | |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 656 | struct btrfs_inode_item { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 657 | /* nfs style generation number */ |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 658 | __le64 generation; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 659 | /* transid that last touched this inode */ |
| 660 | __le64 transid; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 661 | __le64 size; |
Yan Zheng | a76a3cd | 2008-10-09 11:46:29 -0400 | [diff] [blame] | 662 | __le64 nbytes; |
Chris Mason | 31f3c99 | 2007-04-30 15:25:45 -0400 | [diff] [blame] | 663 | __le64 block_group; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 664 | __le32 nlink; |
| 665 | __le32 uid; |
| 666 | __le32 gid; |
| 667 | __le32 mode; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 668 | __le64 rdev; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 669 | __le64 flags; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 670 | |
Chris Mason | c3027eb | 2008-12-08 16:40:21 -0500 | [diff] [blame] | 671 | /* modification sequence number for NFS */ |
| 672 | __le64 sequence; |
| 673 | |
| 674 | /* |
| 675 | * a little future expansion, for more than this we can |
| 676 | * just grow the inode item and version it |
| 677 | */ |
| 678 | __le64 reserved[4]; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 679 | struct btrfs_timespec atime; |
| 680 | struct btrfs_timespec ctime; |
| 681 | struct btrfs_timespec mtime; |
| 682 | struct btrfs_timespec otime; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 683 | } __attribute__ ((__packed__)); |
| 684 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 685 | struct btrfs_dir_log_item { |
| 686 | __le64 end; |
| 687 | } __attribute__ ((__packed__)); |
| 688 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 689 | struct btrfs_dir_item { |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 690 | struct btrfs_disk_key location; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 691 | __le64 transid; |
Josef Bacik | 5103e94 | 2007-11-16 11:45:54 -0500 | [diff] [blame] | 692 | __le16 data_len; |
Chris Mason | a8a2ee0 | 2007-03-16 08:46:49 -0400 | [diff] [blame] | 693 | __le16 name_len; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 694 | u8 type; |
| 695 | } __attribute__ ((__packed__)); |
| 696 | |
Li Zefan | b83cc96 | 2010-12-20 16:04:08 +0800 | [diff] [blame] | 697 | #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0) |
| 698 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 699 | struct btrfs_root_item { |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 700 | struct btrfs_inode_item inode; |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 701 | __le64 generation; |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 702 | __le64 root_dirid; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 703 | __le64 bytenr; |
| 704 | __le64 byte_limit; |
| 705 | __le64 bytes_used; |
Yan Zheng | 80ff385 | 2008-10-30 14:20:02 -0400 | [diff] [blame] | 706 | __le64 last_snapshot; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 707 | __le64 flags; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 708 | __le32 refs; |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 709 | struct btrfs_disk_key drop_progress; |
| 710 | u8 drop_level; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 711 | u8 level; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 712 | } __attribute__ ((__packed__)); |
| 713 | |
Chris Mason | 0660b5a | 2008-11-17 20:37:39 -0500 | [diff] [blame] | 714 | /* |
| 715 | * this is used for both forward and backward root refs |
| 716 | */ |
| 717 | struct btrfs_root_ref { |
| 718 | __le64 dirid; |
| 719 | __le64 sequence; |
| 720 | __le16 name_len; |
| 721 | } __attribute__ ((__packed__)); |
| 722 | |
Ilya Dryomov | 0940ebf | 2012-01-16 22:04:48 +0200 | [diff] [blame] | 723 | struct btrfs_disk_balance_args { |
| 724 | /* |
| 725 | * profiles to operate on, single is denoted by |
| 726 | * BTRFS_AVAIL_ALLOC_BIT_SINGLE |
| 727 | */ |
| 728 | __le64 profiles; |
| 729 | |
| 730 | /* usage filter */ |
| 731 | __le64 usage; |
| 732 | |
| 733 | /* devid filter */ |
| 734 | __le64 devid; |
| 735 | |
| 736 | /* devid subset filter [pstart..pend) */ |
| 737 | __le64 pstart; |
| 738 | __le64 pend; |
| 739 | |
| 740 | /* btrfs virtual address space subset filter [vstart..vend) */ |
| 741 | __le64 vstart; |
| 742 | __le64 vend; |
| 743 | |
| 744 | /* |
| 745 | * profile to convert to, single is denoted by |
| 746 | * BTRFS_AVAIL_ALLOC_BIT_SINGLE |
| 747 | */ |
| 748 | __le64 target; |
| 749 | |
| 750 | /* BTRFS_BALANCE_ARGS_* */ |
| 751 | __le64 flags; |
| 752 | |
| 753 | __le64 unused[8]; |
| 754 | } __attribute__ ((__packed__)); |
| 755 | |
| 756 | /* |
| 757 | * store balance parameters to disk so that balance can be properly |
| 758 | * resumed after crash or unmount |
| 759 | */ |
| 760 | struct btrfs_balance_item { |
| 761 | /* BTRFS_BALANCE_* */ |
| 762 | __le64 flags; |
| 763 | |
| 764 | struct btrfs_disk_balance_args data; |
| 765 | struct btrfs_disk_balance_args meta; |
| 766 | struct btrfs_disk_balance_args sys; |
| 767 | |
| 768 | __le64 unused[4]; |
| 769 | } __attribute__ ((__packed__)); |
| 770 | |
Yan Zheng | d899e05 | 2008-10-30 14:25:28 -0400 | [diff] [blame] | 771 | #define BTRFS_FILE_EXTENT_INLINE 0 |
| 772 | #define BTRFS_FILE_EXTENT_REG 1 |
| 773 | #define BTRFS_FILE_EXTENT_PREALLOC 2 |
Chris Mason | 236454d | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 774 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 775 | struct btrfs_file_extent_item { |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 776 | /* |
| 777 | * transaction id that created this extent |
| 778 | */ |
Chris Mason | 71951f3 | 2007-03-27 09:16:29 -0400 | [diff] [blame] | 779 | __le64 generation; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 780 | /* |
| 781 | * max number of bytes to hold this extent in ram |
| 782 | * when we split a compressed extent we can't know how big |
| 783 | * each of the resulting pieces will be. So, this is |
| 784 | * an upper limit on the size of the extent in ram instead of |
| 785 | * an exact limit. |
| 786 | */ |
| 787 | __le64 ram_bytes; |
| 788 | |
| 789 | /* |
| 790 | * 32 bits for the various ways we might encode the data, |
| 791 | * including compression and encryption. If any of these |
| 792 | * are set to something a given disk format doesn't understand |
| 793 | * it is treated like an incompat flag for reading and writing, |
| 794 | * but not for stat. |
| 795 | */ |
| 796 | u8 compression; |
| 797 | u8 encryption; |
| 798 | __le16 other_encoding; /* spare for later use */ |
| 799 | |
| 800 | /* are we inline data or a real extent? */ |
Chris Mason | 236454d | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 801 | u8 type; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 802 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 803 | /* |
| 804 | * disk space consumed by the extent, checksum blocks are included |
| 805 | * in these numbers |
| 806 | */ |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 807 | __le64 disk_bytenr; |
| 808 | __le64 disk_num_bytes; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 809 | /* |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 810 | * the logical offset in file blocks (no csums) |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 811 | * this extent record is for. This allows a file extent to point |
| 812 | * into the middle of an existing extent on disk, sharing it |
| 813 | * between two snapshots (useful if some bytes in the middle of the |
| 814 | * extent have changed |
| 815 | */ |
| 816 | __le64 offset; |
| 817 | /* |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 818 | * the logical number of file blocks (no csums included). This |
| 819 | * always reflects the size uncompressed and without encoding. |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 820 | */ |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 821 | __le64 num_bytes; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 822 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 823 | } __attribute__ ((__packed__)); |
| 824 | |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 825 | struct btrfs_csum_item { |
Chris Mason | 509659c | 2007-05-10 12:36:17 -0400 | [diff] [blame] | 826 | u8 csum; |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 827 | } __attribute__ ((__packed__)); |
| 828 | |
Stefan Behrens | 733f4fb | 2012-05-25 16:06:10 +0200 | [diff] [blame] | 829 | struct btrfs_dev_stats_item { |
| 830 | /* |
| 831 | * grow this item struct at the end for future enhancements and keep |
| 832 | * the existing values unchanged |
| 833 | */ |
| 834 | __le64 values[BTRFS_DEV_STAT_VALUES_MAX]; |
| 835 | } __attribute__ ((__packed__)); |
| 836 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 837 | /* different types of block groups (and chunks) */ |
Ilya Dryomov | 52ba692 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 838 | #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0) |
| 839 | #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1) |
| 840 | #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2) |
| 841 | #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3) |
| 842 | #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4) |
| 843 | #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5) |
| 844 | #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6) |
Ilya Dryomov | a46d11a | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 845 | #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE |
Ilya Dryomov | 52ba692 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 846 | #define BTRFS_NR_RAID_TYPES 5 |
Chris Mason | 1e2677e | 2007-05-29 16:52:18 -0400 | [diff] [blame] | 847 | |
Ilya Dryomov | 52ba692 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 848 | #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \ |
| 849 | BTRFS_BLOCK_GROUP_SYSTEM | \ |
| 850 | BTRFS_BLOCK_GROUP_METADATA) |
| 851 | |
| 852 | #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \ |
| 853 | BTRFS_BLOCK_GROUP_RAID1 | \ |
| 854 | BTRFS_BLOCK_GROUP_DUP | \ |
| 855 | BTRFS_BLOCK_GROUP_RAID10) |
Ilya Dryomov | a46d11a | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 856 | /* |
| 857 | * We need a bit for restriper to be able to tell when chunks of type |
| 858 | * SINGLE are available. This "extended" profile format is used in |
| 859 | * fs_info->avail_*_alloc_bits (in-memory) and balance item fields |
| 860 | * (on-disk). The corresponding on-disk bit in chunk.type is reserved |
| 861 | * to avoid remappings between two formats in future. |
| 862 | */ |
| 863 | #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48) |
| 864 | |
Ilya Dryomov | 899c81e | 2012-03-27 17:09:16 +0300 | [diff] [blame] | 865 | #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \ |
| 866 | BTRFS_AVAIL_ALLOC_BIT_SINGLE) |
| 867 | |
| 868 | static inline u64 chunk_to_extended(u64 flags) |
| 869 | { |
| 870 | if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0) |
| 871 | flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE; |
| 872 | |
| 873 | return flags; |
| 874 | } |
| 875 | static inline u64 extended_to_chunk(u64 flags) |
| 876 | { |
| 877 | return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE; |
| 878 | } |
| 879 | |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 880 | struct btrfs_block_group_item { |
| 881 | __le64 used; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 882 | __le64 chunk_objectid; |
| 883 | __le64 flags; |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 884 | } __attribute__ ((__packed__)); |
| 885 | |
Chris Mason | 6324fbf | 2008-03-24 15:01:59 -0400 | [diff] [blame] | 886 | struct btrfs_space_info { |
| 887 | u64 flags; |
Josef Bacik | 6a63209 | 2009-02-20 11:00:09 -0500 | [diff] [blame] | 888 | |
Josef Bacik | 89a5589 | 2010-10-14 14:52:27 -0400 | [diff] [blame] | 889 | u64 total_bytes; /* total bytes in the space, |
| 890 | this doesn't take mirrors into account */ |
Yan, Zheng | b742bb8 | 2010-05-16 10:46:24 -0400 | [diff] [blame] | 891 | u64 bytes_used; /* total bytes used, |
Lucas De Marchi | e9c5499 | 2011-04-26 23:28:26 -0700 | [diff] [blame] | 892 | this doesn't take mirrors into account */ |
Josef Bacik | 6a63209 | 2009-02-20 11:00:09 -0500 | [diff] [blame] | 893 | u64 bytes_pinned; /* total bytes pinned, will be freed when the |
| 894 | transaction finishes */ |
| 895 | u64 bytes_reserved; /* total bytes the allocator has reserved for |
| 896 | current allocations */ |
| 897 | u64 bytes_readonly; /* total bytes that are read only */ |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 898 | |
Josef Bacik | 6a63209 | 2009-02-20 11:00:09 -0500 | [diff] [blame] | 899 | u64 bytes_may_use; /* number of bytes that may be used for |
Josef Bacik | 9ed74f2 | 2009-09-11 16:12:44 -0400 | [diff] [blame] | 900 | delalloc/allocations */ |
Yan, Zheng | b742bb8 | 2010-05-16 10:46:24 -0400 | [diff] [blame] | 901 | u64 disk_used; /* total bytes used on disk */ |
Josef Bacik | 89a5589 | 2010-10-14 14:52:27 -0400 | [diff] [blame] | 902 | u64 disk_total; /* total bytes on disk, takes mirrors into |
| 903 | account */ |
Josef Bacik | 6a63209 | 2009-02-20 11:00:09 -0500 | [diff] [blame] | 904 | |
Chris Mason | 36e39c4 | 2011-03-12 07:08:42 -0500 | [diff] [blame] | 905 | /* |
| 906 | * we bump reservation progress every time we decrement |
| 907 | * bytes_reserved. This way people waiting for reservations |
| 908 | * know something good has happened and they can check |
| 909 | * for progress. The number here isn't to be trusted, it |
| 910 | * just shows reclaim activity |
| 911 | */ |
| 912 | unsigned long reservation_progress; |
| 913 | |
David Sterba | 4ea0288 | 2011-05-12 18:13:12 +0200 | [diff] [blame] | 914 | unsigned int full:1; /* indicates that we cannot allocate any more |
Josef Bacik | 6a63209 | 2009-02-20 11:00:09 -0500 | [diff] [blame] | 915 | chunks for this space */ |
David Sterba | 4ea0288 | 2011-05-12 18:13:12 +0200 | [diff] [blame] | 916 | unsigned int chunk_alloc:1; /* set if we are allocating a chunk */ |
Josef Bacik | 6d74119 | 2011-04-11 20:20:11 -0400 | [diff] [blame] | 917 | |
Josef Bacik | fdb5eff | 2011-06-07 16:07:44 -0400 | [diff] [blame] | 918 | unsigned int flush:1; /* set if we are trying to make space */ |
| 919 | |
David Sterba | 4ea0288 | 2011-05-12 18:13:12 +0200 | [diff] [blame] | 920 | unsigned int force_alloc; /* set if we need to force a chunk |
| 921 | alloc for this space */ |
Josef Bacik | 6a63209 | 2009-02-20 11:00:09 -0500 | [diff] [blame] | 922 | |
Chris Mason | 6324fbf | 2008-03-24 15:01:59 -0400 | [diff] [blame] | 923 | struct list_head list; |
Josef Bacik | 0f9dd46 | 2008-09-23 13:14:11 -0400 | [diff] [blame] | 924 | |
| 925 | /* for block groups in our same type */ |
Yan, Zheng | b742bb8 | 2010-05-16 10:46:24 -0400 | [diff] [blame] | 926 | struct list_head block_groups[BTRFS_NR_RAID_TYPES]; |
Josef Bacik | 0f9dd46 | 2008-09-23 13:14:11 -0400 | [diff] [blame] | 927 | spinlock_t lock; |
Josef Bacik | 80eb234 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 928 | struct rw_semaphore groups_sem; |
Josef Bacik | fdb5eff | 2011-06-07 16:07:44 -0400 | [diff] [blame] | 929 | wait_queue_head_t wait; |
Josef Bacik | 0f9dd46 | 2008-09-23 13:14:11 -0400 | [diff] [blame] | 930 | }; |
| 931 | |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 932 | struct btrfs_block_rsv { |
| 933 | u64 size; |
| 934 | u64 reserved; |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 935 | struct btrfs_space_info *space_info; |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 936 | spinlock_t lock; |
David Sterba | c08782d | 2012-01-26 15:01:12 -0500 | [diff] [blame] | 937 | unsigned int full; |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 938 | }; |
| 939 | |
Chris Mason | fa9c0d79 | 2009-04-03 09:47:43 -0400 | [diff] [blame] | 940 | /* |
| 941 | * free clusters are used to claim free space in relatively large chunks, |
| 942 | * allowing us to do less seeky writes. They are used for all metadata |
| 943 | * allocations and data allocations in ssd mode. |
| 944 | */ |
| 945 | struct btrfs_free_cluster { |
| 946 | spinlock_t lock; |
| 947 | spinlock_t refill_lock; |
| 948 | struct rb_root root; |
| 949 | |
| 950 | /* largest extent in this cluster */ |
| 951 | u64 max_size; |
| 952 | |
| 953 | /* first extent starting offset */ |
| 954 | u64 window_start; |
| 955 | |
| 956 | struct btrfs_block_group_cache *block_group; |
| 957 | /* |
| 958 | * when a cluster is allocated from a block group, we put the |
| 959 | * cluster onto a list in the block group so that it can |
| 960 | * be freed before the block group is freed. |
| 961 | */ |
| 962 | struct list_head block_group_list; |
Chris Mason | 6324fbf | 2008-03-24 15:01:59 -0400 | [diff] [blame] | 963 | }; |
| 964 | |
Josef Bacik | 817d52f | 2009-07-13 21:29:25 -0400 | [diff] [blame] | 965 | enum btrfs_caching_type { |
| 966 | BTRFS_CACHE_NO = 0, |
| 967 | BTRFS_CACHE_STARTED = 1, |
Josef Bacik | 291c7d2 | 2011-11-14 13:52:14 -0500 | [diff] [blame] | 968 | BTRFS_CACHE_FAST = 2, |
| 969 | BTRFS_CACHE_FINISHED = 3, |
Josef Bacik | 817d52f | 2009-07-13 21:29:25 -0400 | [diff] [blame] | 970 | }; |
| 971 | |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 972 | enum btrfs_disk_cache_state { |
| 973 | BTRFS_DC_WRITTEN = 0, |
| 974 | BTRFS_DC_ERROR = 1, |
| 975 | BTRFS_DC_CLEAR = 2, |
| 976 | BTRFS_DC_SETUP = 3, |
| 977 | BTRFS_DC_NEED_WRITE = 4, |
| 978 | }; |
| 979 | |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 980 | struct btrfs_caching_control { |
| 981 | struct list_head list; |
| 982 | struct mutex mutex; |
| 983 | wait_queue_head_t wait; |
Josef Bacik | bab39bf | 2011-06-30 14:42:28 -0400 | [diff] [blame] | 984 | struct btrfs_work work; |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 985 | struct btrfs_block_group_cache *block_group; |
| 986 | u64 progress; |
| 987 | atomic_t count; |
| 988 | }; |
| 989 | |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 990 | struct btrfs_block_group_cache { |
| 991 | struct btrfs_key key; |
| 992 | struct btrfs_block_group_item item; |
Josef Bacik | 817d52f | 2009-07-13 21:29:25 -0400 | [diff] [blame] | 993 | struct btrfs_fs_info *fs_info; |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 994 | struct inode *inode; |
Chris Mason | c286ac4 | 2008-07-22 23:06:41 -0400 | [diff] [blame] | 995 | spinlock_t lock; |
Yan | 324ae4d | 2007-11-16 14:57:08 -0500 | [diff] [blame] | 996 | u64 pinned; |
Zheng Yan | e856981 | 2008-09-26 10:05:48 -0400 | [diff] [blame] | 997 | u64 reserved; |
Josef Bacik | 1b2da37 | 2009-09-11 16:11:20 -0400 | [diff] [blame] | 998 | u64 bytes_super; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 999 | u64 flags; |
Josef Bacik | 9630308 | 2009-07-13 21:29:25 -0400 | [diff] [blame] | 1000 | u64 sectorsize; |
Josef Bacik | 5b0e95b | 2011-10-06 08:58:24 -0400 | [diff] [blame] | 1001 | u64 cache_generation; |
Mariusz Kozlowski | 0410c94 | 2010-11-20 12:03:07 +0000 | [diff] [blame] | 1002 | unsigned int ro:1; |
| 1003 | unsigned int dirty:1; |
| 1004 | unsigned int iref:1; |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 1005 | |
| 1006 | int disk_cache_state; |
Josef Bacik | 0f9dd46 | 2008-09-23 13:14:11 -0400 | [diff] [blame] | 1007 | |
Josef Bacik | 817d52f | 2009-07-13 21:29:25 -0400 | [diff] [blame] | 1008 | /* cache tracking stuff */ |
Josef Bacik | 817d52f | 2009-07-13 21:29:25 -0400 | [diff] [blame] | 1009 | int cached; |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 1010 | struct btrfs_caching_control *caching_ctl; |
| 1011 | u64 last_byte_to_unpin; |
Josef Bacik | 817d52f | 2009-07-13 21:29:25 -0400 | [diff] [blame] | 1012 | |
Josef Bacik | 0f9dd46 | 2008-09-23 13:14:11 -0400 | [diff] [blame] | 1013 | struct btrfs_space_info *space_info; |
| 1014 | |
| 1015 | /* free space cache stuff */ |
Li Zefan | 34d52cb | 2011-03-29 13:46:06 +0800 | [diff] [blame] | 1016 | struct btrfs_free_space_ctl *free_space_ctl; |
Josef Bacik | 0f9dd46 | 2008-09-23 13:14:11 -0400 | [diff] [blame] | 1017 | |
| 1018 | /* block group cache stuff */ |
| 1019 | struct rb_node cache_node; |
| 1020 | |
| 1021 | /* for block groups in the same raid type */ |
| 1022 | struct list_head list; |
Yan Zheng | d2fb343 | 2008-12-11 16:30:39 -0500 | [diff] [blame] | 1023 | |
| 1024 | /* usage count */ |
| 1025 | atomic_t count; |
Chris Mason | fa9c0d79 | 2009-04-03 09:47:43 -0400 | [diff] [blame] | 1026 | |
| 1027 | /* List of struct btrfs_free_clusters for this block group. |
| 1028 | * Today it will only have one thing on it, but that may change |
| 1029 | */ |
| 1030 | struct list_head cluster_list; |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 1031 | }; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1032 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1033 | struct reloc_control; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1034 | struct btrfs_device; |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 1035 | struct btrfs_fs_devices; |
Ilya Dryomov | c9e9f97 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 1036 | struct btrfs_balance_control; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 1037 | struct btrfs_delayed_root; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 1038 | struct btrfs_fs_info { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1039 | u8 fsid[BTRFS_FSID_SIZE]; |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 1040 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 1041 | struct btrfs_root *extent_root; |
| 1042 | struct btrfs_root *tree_root; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1043 | struct btrfs_root *chunk_root; |
| 1044 | struct btrfs_root *dev_root; |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 1045 | struct btrfs_root *fs_root; |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 1046 | struct btrfs_root *csum_root; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1047 | |
| 1048 | /* the log root tree is a directory of all the other log roots */ |
| 1049 | struct btrfs_root *log_root_tree; |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1050 | |
| 1051 | spinlock_t fs_roots_radix_lock; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1052 | struct radix_tree_root fs_roots_radix; |
Chris Mason | 1a5bc16 | 2007-10-15 16:15:26 -0400 | [diff] [blame] | 1053 | |
Josef Bacik | 0f9dd46 | 2008-09-23 13:14:11 -0400 | [diff] [blame] | 1054 | /* block group cache stuff */ |
| 1055 | spinlock_t block_group_cache_lock; |
| 1056 | struct rb_root block_group_cache_tree; |
| 1057 | |
Josef Bacik | 2bf6475 | 2011-09-26 17:12:22 -0400 | [diff] [blame] | 1058 | /* keep track of unallocated space */ |
| 1059 | spinlock_t free_chunk_lock; |
| 1060 | u64 free_chunk_space; |
| 1061 | |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 1062 | struct extent_io_tree freed_extents[2]; |
| 1063 | struct extent_io_tree *pinned_extents; |
Chris Mason | 1a5bc16 | 2007-10-15 16:15:26 -0400 | [diff] [blame] | 1064 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1065 | /* logical->physical extent mapping */ |
| 1066 | struct btrfs_mapping_tree mapping_tree; |
| 1067 | |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 1068 | /* |
| 1069 | * block reservation for extent, checksum, root tree and |
| 1070 | * delayed dir index item |
| 1071 | */ |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 1072 | struct btrfs_block_rsv global_block_rsv; |
| 1073 | /* block reservation for delay allocation */ |
| 1074 | struct btrfs_block_rsv delalloc_block_rsv; |
| 1075 | /* block reservation for metadata operations */ |
| 1076 | struct btrfs_block_rsv trans_block_rsv; |
| 1077 | /* block reservation for chunk tree */ |
| 1078 | struct btrfs_block_rsv chunk_block_rsv; |
Josef Bacik | 6d668dd | 2011-11-03 22:54:25 -0400 | [diff] [blame] | 1079 | /* block reservation for delayed operations */ |
| 1080 | struct btrfs_block_rsv delayed_block_rsv; |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 1081 | |
| 1082 | struct btrfs_block_rsv empty_block_rsv; |
| 1083 | |
Chris Mason | 293ffd5 | 2007-03-20 15:57:25 -0400 | [diff] [blame] | 1084 | u64 generation; |
Josef Bacik | 15ee9bc | 2007-08-10 16:22:09 -0400 | [diff] [blame] | 1085 | u64 last_trans_committed; |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 1086 | |
| 1087 | /* |
| 1088 | * this is updated to the current trans every time a full commit |
| 1089 | * is required instead of the faster short fsync log commits |
| 1090 | */ |
| 1091 | u64 last_trans_log_full_commit; |
Stefan Behrens | 25cd999 | 2012-03-30 13:58:32 +0200 | [diff] [blame] | 1092 | unsigned long mount_opt; |
Li Zefan | 261507a0 | 2010-12-17 14:21:50 +0800 | [diff] [blame] | 1093 | unsigned long compress_type:4; |
Chris Mason | 6f568d3 | 2008-01-29 16:03:38 -0500 | [diff] [blame] | 1094 | u64 max_inline; |
Chris Mason | 8f662a7 | 2008-01-02 10:01:11 -0500 | [diff] [blame] | 1095 | u64 alloc_start; |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 1096 | struct btrfs_transaction *running_transaction; |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 1097 | wait_queue_head_t transaction_throttle; |
Chris Mason | f929574 | 2008-07-17 12:54:14 -0400 | [diff] [blame] | 1098 | wait_queue_head_t transaction_wait; |
Sage Weil | bb9c12c | 2010-10-29 15:37:34 -0400 | [diff] [blame] | 1099 | wait_queue_head_t transaction_blocked_wait; |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 1100 | wait_queue_head_t async_submit_wait; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1101 | |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 1102 | struct btrfs_super_block *super_copy; |
| 1103 | struct btrfs_super_block *super_for_commit; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1104 | struct block_device *__bdev; |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 1105 | struct super_block *sb; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 1106 | struct inode *btree_inode; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 1107 | struct backing_dev_info bdi; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1108 | struct mutex tree_log_mutex; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1109 | struct mutex transaction_kthread_mutex; |
| 1110 | struct mutex cleaner_mutex; |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1111 | struct mutex chunk_mutex; |
Chris Mason | 7d9eb12 | 2008-07-08 14:19:17 -0400 | [diff] [blame] | 1112 | struct mutex volume_mutex; |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 1113 | /* |
| 1114 | * this protects the ordered operations list only while we are |
| 1115 | * processing all of the entries on it. This way we make |
| 1116 | * sure the commit code doesn't find the list temporarily empty |
| 1117 | * because another function happens to be doing non-waiting preflush |
| 1118 | * before jumping into the main commit. |
| 1119 | */ |
| 1120 | struct mutex ordered_operations_mutex; |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 1121 | struct rw_semaphore extent_commit_sem; |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 1122 | |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 1123 | struct rw_semaphore cleanup_work_sem; |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1124 | |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 1125 | struct rw_semaphore subvol_sem; |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1126 | struct srcu_struct subvol_srcu; |
| 1127 | |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1128 | spinlock_t trans_lock; |
Chris Mason | 7585717 | 2011-06-13 20:00:16 -0400 | [diff] [blame] | 1129 | /* |
| 1130 | * the reloc mutex goes with the trans lock, it is taken |
| 1131 | * during commit to protect us from the relocation code |
| 1132 | */ |
| 1133 | struct mutex reloc_mutex; |
| 1134 | |
Chris Mason | 8fd1779 | 2007-04-19 21:01:03 -0400 | [diff] [blame] | 1135 | struct list_head trans_list; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 1136 | struct list_head hashers; |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 1137 | struct list_head dead_roots; |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 1138 | struct list_head caching_block_groups; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1139 | |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 1140 | spinlock_t delayed_iput_lock; |
| 1141 | struct list_head delayed_iputs; |
| 1142 | |
Jan Schmidt | f29021b | 2012-05-16 17:55:38 +0200 | [diff] [blame] | 1143 | /* this protects tree_mod_seq_list */ |
| 1144 | spinlock_t tree_mod_seq_lock; |
| 1145 | atomic_t tree_mod_seq; |
| 1146 | struct list_head tree_mod_seq_list; |
| 1147 | |
| 1148 | /* this protects tree_mod_log */ |
| 1149 | rwlock_t tree_mod_log_lock; |
| 1150 | struct rb_root tree_mod_log; |
| 1151 | |
Chris Mason | cb03c74 | 2008-05-15 16:15:45 -0400 | [diff] [blame] | 1152 | atomic_t nr_async_submits; |
Chris Mason | 8c8bee1 | 2008-09-29 11:19:10 -0400 | [diff] [blame] | 1153 | atomic_t async_submit_draining; |
Chris Mason | 0986fe9e | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 1154 | atomic_t nr_async_bios; |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 1155 | atomic_t async_delalloc_pages; |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1156 | atomic_t open_ioctl_trans; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1157 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1158 | /* |
Chris Mason | 3eaa288 | 2008-07-24 11:57:52 -0400 | [diff] [blame] | 1159 | * this is used by the balancing code to wait for all the pending |
| 1160 | * ordered extents |
| 1161 | */ |
| 1162 | spinlock_t ordered_extent_lock; |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 1163 | |
| 1164 | /* |
| 1165 | * all of the data=ordered extents pending writeback |
| 1166 | * these can span multiple transactions and basically include |
| 1167 | * every dirty data page that isn't from nodatacow |
| 1168 | */ |
Chris Mason | 3eaa288 | 2008-07-24 11:57:52 -0400 | [diff] [blame] | 1169 | struct list_head ordered_extents; |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 1170 | |
| 1171 | /* |
| 1172 | * all of the inodes that have delalloc bytes. It is possible for |
| 1173 | * this list to be empty even when there is still dirty data=ordered |
| 1174 | * extents waiting to finish IO. |
| 1175 | */ |
Chris Mason | ea8c281 | 2008-08-04 23:17:27 -0400 | [diff] [blame] | 1176 | struct list_head delalloc_inodes; |
Chris Mason | 3eaa288 | 2008-07-24 11:57:52 -0400 | [diff] [blame] | 1177 | |
| 1178 | /* |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 1179 | * special rename and truncate targets that must be on disk before |
| 1180 | * we're allowed to commit. This is basically the ext3 style |
| 1181 | * data=ordered list. |
| 1182 | */ |
| 1183 | struct list_head ordered_operations; |
| 1184 | |
| 1185 | /* |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1186 | * there is a pool of worker threads for checksumming during writes |
| 1187 | * and a pool for checksumming after reads. This is because readers |
| 1188 | * can run with FS locks held, and the writers may be waiting for |
| 1189 | * those locks. We don't want ordering in the pending list to cause |
| 1190 | * deadlocks, and so the two are serviced separately. |
Chris Mason | 1cc127b | 2008-06-12 14:46:17 -0400 | [diff] [blame] | 1191 | * |
| 1192 | * A third pool does submit_bio to avoid deadlocking with the other |
| 1193 | * two |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1194 | */ |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 1195 | struct btrfs_workers generic_worker; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1196 | struct btrfs_workers workers; |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 1197 | struct btrfs_workers delalloc_workers; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1198 | struct btrfs_workers endio_workers; |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 1199 | struct btrfs_workers endio_meta_workers; |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 1200 | struct btrfs_workers endio_meta_write_workers; |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 1201 | struct btrfs_workers endio_write_workers; |
Josef Bacik | 0cb59c9 | 2010-07-02 12:14:14 -0400 | [diff] [blame] | 1202 | struct btrfs_workers endio_freespace_worker; |
Chris Mason | 1cc127b | 2008-06-12 14:46:17 -0400 | [diff] [blame] | 1203 | struct btrfs_workers submit_workers; |
Josef Bacik | bab39bf | 2011-06-30 14:42:28 -0400 | [diff] [blame] | 1204 | struct btrfs_workers caching_workers; |
Arne Jansen | 90519d6 | 2011-05-23 14:30:00 +0200 | [diff] [blame] | 1205 | struct btrfs_workers readahead_workers; |
Josef Bacik | bab39bf | 2011-06-30 14:42:28 -0400 | [diff] [blame] | 1206 | |
Chris Mason | 247e743 | 2008-07-17 12:53:51 -0400 | [diff] [blame] | 1207 | /* |
| 1208 | * fixup workers take dirty pages that didn't properly go through |
| 1209 | * the cow mechanism and make them safe to write. It happens |
| 1210 | * for the sys_munmap function call path |
| 1211 | */ |
| 1212 | struct btrfs_workers fixup_workers; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 1213 | struct btrfs_workers delayed_workers; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1214 | struct task_struct *transaction_kthread; |
| 1215 | struct task_struct *cleaner_kthread; |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 1216 | int thread_pool_size; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1217 | |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1218 | struct kobject super_kobj; |
| 1219 | struct completion kobj_unregister; |
Chris Mason | e66f709 | 2007-04-20 13:16:02 -0400 | [diff] [blame] | 1220 | int do_barriers; |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 1221 | int closing; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1222 | int log_root_recovering; |
Yan, Zheng | a22285a | 2010-05-16 10:48:46 -0400 | [diff] [blame] | 1223 | int enospc_unlink; |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1224 | int trans_no_join; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 1225 | |
Yan | 324ae4d | 2007-11-16 14:57:08 -0500 | [diff] [blame] | 1226 | u64 total_pinned; |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 1227 | |
| 1228 | /* protected by the delalloc lock, used to keep from writing |
| 1229 | * metadata until there is a nice batch |
| 1230 | */ |
| 1231 | u64 dirty_metadata_bytes; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1232 | struct list_head dirty_cowonly_roots; |
| 1233 | |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 1234 | struct btrfs_fs_devices *fs_devices; |
Chris Mason | 4184ea7 | 2009-03-10 12:39:20 -0400 | [diff] [blame] | 1235 | |
| 1236 | /* |
| 1237 | * the space_info list is almost entirely read only. It only changes |
| 1238 | * when we add a new raid type to the FS, and that happens |
| 1239 | * very rarely. RCU is used to protect it. |
| 1240 | */ |
Chris Mason | 6324fbf | 2008-03-24 15:01:59 -0400 | [diff] [blame] | 1241 | struct list_head space_info; |
Chris Mason | 4184ea7 | 2009-03-10 12:39:20 -0400 | [diff] [blame] | 1242 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1243 | struct reloc_control *reloc_ctl; |
| 1244 | |
Chris Mason | 1832a6d | 2007-12-21 16:27:21 -0500 | [diff] [blame] | 1245 | spinlock_t delalloc_lock; |
| 1246 | u64 delalloc_bytes; |
Chris Mason | fa9c0d79 | 2009-04-03 09:47:43 -0400 | [diff] [blame] | 1247 | |
| 1248 | /* data_alloc_cluster is only used in ssd mode */ |
| 1249 | struct btrfs_free_cluster data_alloc_cluster; |
| 1250 | |
| 1251 | /* all metadata allocations go through this cluster */ |
| 1252 | struct btrfs_free_cluster meta_alloc_cluster; |
Chris Mason | d18a2c4 | 2008-04-04 15:40:00 -0400 | [diff] [blame] | 1253 | |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 1254 | /* auto defrag inodes go here */ |
| 1255 | spinlock_t defrag_inodes_lock; |
| 1256 | struct rb_root defrag_inodes; |
| 1257 | atomic_t defrag_running; |
| 1258 | |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 1259 | spinlock_t ref_cache_lock; |
| 1260 | u64 total_ref_cache_size; |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 1261 | |
Ilya Dryomov | a46d11a | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 1262 | /* |
| 1263 | * these three are in extended format (availability of single |
| 1264 | * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other |
| 1265 | * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) |
| 1266 | */ |
Chris Mason | d18a2c4 | 2008-04-04 15:40:00 -0400 | [diff] [blame] | 1267 | u64 avail_data_alloc_bits; |
| 1268 | u64 avail_metadata_alloc_bits; |
| 1269 | u64 avail_system_alloc_bits; |
Chris Mason | 788f20e | 2008-04-28 15:29:42 -0400 | [diff] [blame] | 1270 | |
Ilya Dryomov | c9e9f97 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 1271 | /* restriper state */ |
| 1272 | spinlock_t balance_lock; |
| 1273 | struct mutex balance_mutex; |
Ilya Dryomov | 837d5b6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 1274 | atomic_t balance_running; |
| 1275 | atomic_t balance_pause_req; |
Ilya Dryomov | a7e99c6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 1276 | atomic_t balance_cancel_req; |
Ilya Dryomov | c9e9f97 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 1277 | struct btrfs_balance_control *balance_ctl; |
Ilya Dryomov | 837d5b6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 1278 | wait_queue_head_t balance_wait_q; |
Ilya Dryomov | c9e9f97 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 1279 | |
Josef Bacik | 97e728d | 2009-04-21 17:40:57 -0400 | [diff] [blame] | 1280 | unsigned data_chunk_allocations; |
| 1281 | unsigned metadata_ratio; |
| 1282 | |
Chris Mason | 788f20e | 2008-04-28 15:29:42 -0400 | [diff] [blame] | 1283 | void *bdev_holder; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 1284 | |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 1285 | /* private scrub information */ |
| 1286 | struct mutex scrub_lock; |
| 1287 | atomic_t scrubs_running; |
| 1288 | atomic_t scrub_pause_req; |
| 1289 | atomic_t scrubs_paused; |
| 1290 | atomic_t scrub_cancel_req; |
| 1291 | wait_queue_head_t scrub_pause_wait; |
| 1292 | struct rw_semaphore scrub_super_lock; |
| 1293 | int scrub_workers_refcnt; |
| 1294 | struct btrfs_workers scrub_workers; |
| 1295 | |
Stefan Behrens | 21adbd5 | 2011-11-09 13:44:05 +0100 | [diff] [blame] | 1296 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
| 1297 | u32 check_integrity_print_mask; |
| 1298 | #endif |
| 1299 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 1300 | /* filesystem state */ |
| 1301 | u64 fs_state; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 1302 | |
| 1303 | struct btrfs_delayed_root *delayed_root; |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1304 | |
Arne Jansen | 90519d6 | 2011-05-23 14:30:00 +0200 | [diff] [blame] | 1305 | /* readahead tree */ |
| 1306 | spinlock_t reada_lock; |
| 1307 | struct radix_tree_root reada_tree; |
Chris Mason | 531f4b1a | 2011-11-06 03:05:08 -0500 | [diff] [blame] | 1308 | |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1309 | /* next backup root to be overwritten */ |
| 1310 | int backup_root_index; |
Yan | 324ae4d | 2007-11-16 14:57:08 -0500 | [diff] [blame] | 1311 | }; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1312 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 1313 | /* |
| 1314 | * 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] | 1315 | * and for the extent tree extent_root root. |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 1316 | */ |
| 1317 | struct btrfs_root { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1318 | struct extent_buffer *node; |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1319 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1320 | struct extent_buffer *commit_root; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1321 | struct btrfs_root *log_root; |
Zheng Yan | 1a40e23 | 2008-09-26 10:09:34 -0400 | [diff] [blame] | 1322 | struct btrfs_root *reloc_root; |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 1323 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 1324 | struct btrfs_root_item root_item; |
| 1325 | struct btrfs_key root_key; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 1326 | struct btrfs_fs_info *fs_info; |
Chris Mason | d0c803c | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 1327 | struct extent_io_tree dirty_log_pages; |
| 1328 | |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1329 | struct kobject root_kobj; |
| 1330 | struct completion kobj_unregister; |
Chris Mason | a213501 | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1331 | struct mutex objectid_mutex; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1332 | |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 1333 | spinlock_t accounting_lock; |
| 1334 | struct btrfs_block_rsv *block_rsv; |
| 1335 | |
Li Zefan | 581bb05 | 2011-04-20 10:06:11 +0800 | [diff] [blame] | 1336 | /* free ino cache stuff */ |
| 1337 | struct mutex fs_commit_mutex; |
| 1338 | struct btrfs_free_space_ctl *free_ino_ctl; |
| 1339 | enum btrfs_caching_type cached; |
| 1340 | spinlock_t cache_lock; |
| 1341 | wait_queue_head_t cache_wait; |
| 1342 | struct btrfs_free_space_ctl *free_ino_pinned; |
| 1343 | u64 cache_progress; |
Li Zefan | 82d5902 | 2011-04-20 10:33:24 +0800 | [diff] [blame] | 1344 | struct inode *cache_inode; |
Li Zefan | 581bb05 | 2011-04-20 10:06:11 +0800 | [diff] [blame] | 1345 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1346 | struct mutex log_mutex; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1347 | wait_queue_head_t log_writer_wait; |
| 1348 | wait_queue_head_t log_commit_wait[2]; |
| 1349 | atomic_t log_writers; |
| 1350 | atomic_t log_commit[2]; |
| 1351 | unsigned long log_transid; |
Chris Mason | 257c62e | 2009-10-13 13:21:08 -0400 | [diff] [blame] | 1352 | unsigned long last_log_commit; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1353 | unsigned long log_batch; |
Josef Bacik | ff782e0 | 2009-10-08 15:30:04 -0400 | [diff] [blame] | 1354 | pid_t log_start_pid; |
| 1355 | bool log_multiple_pids; |
Chris Mason | ea8c281 | 2008-08-04 23:17:27 -0400 | [diff] [blame] | 1356 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1357 | u64 objectid; |
| 1358 | u64 last_trans; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1359 | |
| 1360 | /* data allocations are done in sectorsize units */ |
| 1361 | u32 sectorsize; |
| 1362 | |
| 1363 | /* node allocations are done in nodesize units */ |
| 1364 | u32 nodesize; |
| 1365 | |
| 1366 | /* leaf allocations are done in leafsize units */ |
| 1367 | u32 leafsize; |
| 1368 | |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1369 | u32 stripesize; |
| 1370 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 1371 | u32 type; |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1372 | |
| 1373 | u64 highest_objectid; |
Chris Mason | 7585717 | 2011-06-13 20:00:16 -0400 | [diff] [blame] | 1374 | |
| 1375 | /* btrfs_record_root_in_trans is a multi-step process, |
| 1376 | * and it can race with the balancing code. But the |
| 1377 | * race is very small, and only the first time the root |
| 1378 | * is added to each transaction. So in_trans_setup |
| 1379 | * is used to tell us when more checks are required |
| 1380 | */ |
| 1381 | unsigned long in_trans_setup; |
Chris Mason | 9f3a742 | 2007-08-07 15:52:19 -0400 | [diff] [blame] | 1382 | int ref_cows; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1383 | int track_dirty; |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1384 | int in_radix; |
| 1385 | |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1386 | u64 defrag_trans_start; |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 1387 | struct btrfs_key defrag_progress; |
Chris Mason | 0ef3e66 | 2008-05-24 14:04:53 -0400 | [diff] [blame] | 1388 | struct btrfs_key defrag_max; |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 1389 | int defrag_running; |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1390 | char *name; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1391 | |
| 1392 | /* the dirty list is only used by non-reference counted roots */ |
| 1393 | struct list_head dirty_list; |
Josef Bacik | 7b12876 | 2008-07-24 12:17:14 -0400 | [diff] [blame] | 1394 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1395 | struct list_head root_list; |
| 1396 | |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1397 | spinlock_t orphan_lock; |
Josef Bacik | 8a35d95 | 2012-05-23 14:26:42 -0400 | [diff] [blame] | 1398 | atomic_t orphan_inodes; |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1399 | struct btrfs_block_rsv *orphan_block_rsv; |
| 1400 | int orphan_item_inserted; |
| 1401 | int orphan_cleanup_state; |
Chris Mason | 3394e16 | 2008-11-17 20:42:26 -0500 | [diff] [blame] | 1402 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1403 | spinlock_t inode_lock; |
| 1404 | /* red-black tree that keeps track of in-memory inodes */ |
| 1405 | struct rb_root inode_tree; |
| 1406 | |
Chris Mason | 3394e16 | 2008-11-17 20:42:26 -0500 | [diff] [blame] | 1407 | /* |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 1408 | * radix tree that keeps track of delayed nodes of every inode, |
| 1409 | * protected by inode_lock |
| 1410 | */ |
| 1411 | struct radix_tree_root delayed_nodes_tree; |
| 1412 | /* |
Chris Mason | 3394e16 | 2008-11-17 20:42:26 -0500 | [diff] [blame] | 1413 | * right now this just gets used so that a root has its own devid |
| 1414 | * for stat. It may be used for more later |
| 1415 | */ |
Al Viro | 0ee5dc6 | 2011-07-07 15:44:25 -0400 | [diff] [blame] | 1416 | dev_t anon_dev; |
Liu Bo | f1ebcc7 | 2011-11-14 20:48:06 -0500 | [diff] [blame] | 1417 | |
| 1418 | int force_cow; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 1419 | }; |
| 1420 | |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 1421 | struct btrfs_ioctl_defrag_range_args { |
| 1422 | /* start of the defrag operation */ |
| 1423 | __u64 start; |
| 1424 | |
| 1425 | /* number of bytes to defrag, use (u64)-1 to say all */ |
| 1426 | __u64 len; |
| 1427 | |
| 1428 | /* |
| 1429 | * flags for the operation, which can include turning |
| 1430 | * on compression for this one defrag |
| 1431 | */ |
| 1432 | __u64 flags; |
| 1433 | |
| 1434 | /* |
| 1435 | * any extent bigger than this will be considered |
| 1436 | * already defragged. Use 0 to take the kernel default |
| 1437 | * Use 1 to say every single extent must be rewritten |
| 1438 | */ |
| 1439 | __u32 extent_thresh; |
| 1440 | |
| 1441 | /* |
| 1442 | * which compression method to use if turning on compression |
| 1443 | * for this defrag operation. If unspecified, zlib will |
| 1444 | * be used |
| 1445 | */ |
| 1446 | __u32 compress_type; |
| 1447 | |
| 1448 | /* spare for later */ |
| 1449 | __u32 unused[4]; |
| 1450 | }; |
| 1451 | |
| 1452 | |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1453 | /* |
| 1454 | * inode items have the data typically returned from stat and store other |
| 1455 | * info about object characteristics. There is one for every file and dir in |
| 1456 | * the FS |
| 1457 | */ |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 1458 | #define BTRFS_INODE_ITEM_KEY 1 |
Chris Mason | 0660b5a | 2008-11-17 20:37:39 -0500 | [diff] [blame] | 1459 | #define BTRFS_INODE_REF_KEY 12 |
| 1460 | #define BTRFS_XATTR_ITEM_KEY 24 |
| 1461 | #define BTRFS_ORPHAN_ITEM_KEY 48 |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 1462 | /* reserve 2-15 close to the inode for later flexibility */ |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1463 | |
| 1464 | /* |
| 1465 | * dir items are the name -> inode pointers in a directory. There is one |
| 1466 | * for every name in a directory. |
| 1467 | */ |
Chris Mason | 0660b5a | 2008-11-17 20:37:39 -0500 | [diff] [blame] | 1468 | #define BTRFS_DIR_LOG_ITEM_KEY 60 |
| 1469 | #define BTRFS_DIR_LOG_INDEX_KEY 72 |
| 1470 | #define BTRFS_DIR_ITEM_KEY 84 |
| 1471 | #define BTRFS_DIR_INDEX_KEY 96 |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1472 | /* |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 1473 | * extent data is for file data |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1474 | */ |
Chris Mason | 0660b5a | 2008-11-17 20:37:39 -0500 | [diff] [blame] | 1475 | #define BTRFS_EXTENT_DATA_KEY 108 |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 1476 | |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1477 | /* |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 1478 | * extent csums are stored in a separate tree and hold csums for |
| 1479 | * an entire extent on disk. |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 1480 | */ |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 1481 | #define BTRFS_EXTENT_CSUM_KEY 128 |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 1482 | |
| 1483 | /* |
Wu Fengguang | d4a7894 | 2009-04-02 16:46:06 -0400 | [diff] [blame] | 1484 | * root items point to tree roots. They are typically in the root |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1485 | * tree used by the super block to find all the other trees |
| 1486 | */ |
Chris Mason | 0660b5a | 2008-11-17 20:37:39 -0500 | [diff] [blame] | 1487 | #define BTRFS_ROOT_ITEM_KEY 132 |
| 1488 | |
| 1489 | /* |
| 1490 | * root backrefs tie subvols and snapshots to the directory entries that |
| 1491 | * reference them |
| 1492 | */ |
| 1493 | #define BTRFS_ROOT_BACKREF_KEY 144 |
| 1494 | |
| 1495 | /* |
| 1496 | * root refs make a fast index for listing all of the snapshots and |
| 1497 | * subvolumes referenced by a given root. They point directly to the |
| 1498 | * directory item in the root that references the subvol |
| 1499 | */ |
| 1500 | #define BTRFS_ROOT_REF_KEY 156 |
| 1501 | |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1502 | /* |
| 1503 | * extent items are in the extent map tree. These record which blocks |
| 1504 | * are used, and how many references there are to each block |
| 1505 | */ |
Chris Mason | 0660b5a | 2008-11-17 20:37:39 -0500 | [diff] [blame] | 1506 | #define BTRFS_EXTENT_ITEM_KEY 168 |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1507 | |
| 1508 | #define BTRFS_TREE_BLOCK_REF_KEY 176 |
| 1509 | |
| 1510 | #define BTRFS_EXTENT_DATA_REF_KEY 178 |
| 1511 | |
| 1512 | #define BTRFS_EXTENT_REF_V0_KEY 180 |
| 1513 | |
| 1514 | #define BTRFS_SHARED_BLOCK_REF_KEY 182 |
| 1515 | |
| 1516 | #define BTRFS_SHARED_DATA_REF_KEY 184 |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 1517 | |
| 1518 | /* |
| 1519 | * block groups give us hints into the extent allocation trees. Which |
| 1520 | * blocks are free etc etc |
| 1521 | */ |
Chris Mason | 0660b5a | 2008-11-17 20:37:39 -0500 | [diff] [blame] | 1522 | #define BTRFS_BLOCK_GROUP_ITEM_KEY 192 |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 1523 | |
Chris Mason | 0660b5a | 2008-11-17 20:37:39 -0500 | [diff] [blame] | 1524 | #define BTRFS_DEV_EXTENT_KEY 204 |
| 1525 | #define BTRFS_DEV_ITEM_KEY 216 |
| 1526 | #define BTRFS_CHUNK_ITEM_KEY 228 |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1527 | |
Ilya Dryomov | 0940ebf | 2012-01-16 22:04:48 +0200 | [diff] [blame] | 1528 | #define BTRFS_BALANCE_ITEM_KEY 248 |
| 1529 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 1530 | /* |
Stefan Behrens | 733f4fb | 2012-05-25 16:06:10 +0200 | [diff] [blame] | 1531 | * Persistantly stores the io stats in the device tree. |
| 1532 | * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid). |
| 1533 | */ |
| 1534 | #define BTRFS_DEV_STATS_KEY 249 |
| 1535 | |
| 1536 | /* |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1537 | * string items are for debugging. They just store a short string of |
| 1538 | * data in the FS |
| 1539 | */ |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 1540 | #define BTRFS_STRING_ITEM_KEY 253 |
| 1541 | |
David Sterba | 0942caa | 2011-06-28 15:10:37 +0000 | [diff] [blame] | 1542 | /* |
| 1543 | * Flags for mount options. |
| 1544 | * |
| 1545 | * Note: don't forget to add new options to btrfs_show_options() |
| 1546 | */ |
Chris Mason | 21ad10c | 2008-01-09 09:23:21 -0500 | [diff] [blame] | 1547 | #define BTRFS_MOUNT_NODATASUM (1 << 0) |
| 1548 | #define BTRFS_MOUNT_NODATACOW (1 << 1) |
| 1549 | #define BTRFS_MOUNT_NOBARRIER (1 << 2) |
Chris Mason | e18e480 | 2008-01-18 10:54:22 -0500 | [diff] [blame] | 1550 | #define BTRFS_MOUNT_SSD (1 << 3) |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 1551 | #define BTRFS_MOUNT_DEGRADED (1 << 4) |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 1552 | #define BTRFS_MOUNT_COMPRESS (1 << 5) |
Sage Weil | 3a5e140 | 2009-04-02 16:49:40 -0400 | [diff] [blame] | 1553 | #define BTRFS_MOUNT_NOTREELOG (1 << 6) |
Sage Weil | dccae99 | 2009-04-02 16:59:01 -0400 | [diff] [blame] | 1554 | #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) |
Chris Mason | 451d758 | 2009-06-09 20:28:34 -0400 | [diff] [blame] | 1555 | #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) |
Chris Mason | c289811 | 2009-06-10 09:51:32 -0400 | [diff] [blame] | 1556 | #define BTRFS_MOUNT_NOSSD (1 << 9) |
Christoph Hellwig | e244a0a | 2009-10-14 09:24:59 -0400 | [diff] [blame] | 1557 | #define BTRFS_MOUNT_DISCARD (1 << 10) |
Chris Mason | a555f81 | 2010-01-28 16:18:15 -0500 | [diff] [blame] | 1558 | #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 1559 | #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) |
Josef Bacik | 88c2ba3 | 2010-09-21 14:21:34 -0400 | [diff] [blame] | 1560 | #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) |
Sage Weil | 4260f7c | 2010-10-29 15:46:43 -0400 | [diff] [blame] | 1561 | #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) |
Chris Mason | 9143565 | 2011-02-16 13:10:41 -0500 | [diff] [blame] | 1562 | #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 1563 | #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) |
Chris Mason | 4b9465c | 2011-06-03 09:36:29 -0400 | [diff] [blame] | 1564 | #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1565 | #define BTRFS_MOUNT_RECOVERY (1 << 18) |
Ilya Dryomov | 9555c6c | 2012-01-16 22:04:48 +0200 | [diff] [blame] | 1566 | #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) |
Chris Mason | c126dea | 2012-01-16 15:27:58 -0500 | [diff] [blame] | 1567 | #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) |
| 1568 | #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) |
Jeff Mahoney | 8c34293 | 2011-10-03 23:22:31 -0400 | [diff] [blame] | 1569 | #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) |
Chris Mason | b6cda9b | 2007-12-14 15:30:32 -0500 | [diff] [blame] | 1570 | |
| 1571 | #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) |
| 1572 | #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) |
| 1573 | #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ |
| 1574 | BTRFS_MOUNT_##opt) |
Yan | b98b676 | 2008-01-08 15:54:37 -0500 | [diff] [blame] | 1575 | /* |
| 1576 | * Inode flags |
| 1577 | */ |
Yan | fdebe2b | 2008-01-14 13:26:08 -0500 | [diff] [blame] | 1578 | #define BTRFS_INODE_NODATASUM (1 << 0) |
| 1579 | #define BTRFS_INODE_NODATACOW (1 << 1) |
| 1580 | #define BTRFS_INODE_READONLY (1 << 2) |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 1581 | #define BTRFS_INODE_NOCOMPRESS (1 << 3) |
Yan Zheng | d899e05 | 2008-10-30 14:25:28 -0400 | [diff] [blame] | 1582 | #define BTRFS_INODE_PREALLOC (1 << 4) |
Christoph Hellwig | 6cbff00 | 2009-04-17 10:37:41 +0200 | [diff] [blame] | 1583 | #define BTRFS_INODE_SYNC (1 << 5) |
| 1584 | #define BTRFS_INODE_IMMUTABLE (1 << 6) |
| 1585 | #define BTRFS_INODE_APPEND (1 << 7) |
| 1586 | #define BTRFS_INODE_NODUMP (1 << 8) |
| 1587 | #define BTRFS_INODE_NOATIME (1 << 9) |
| 1588 | #define BTRFS_INODE_DIRSYNC (1 << 10) |
Liu Bo | 75e7cb7 | 2011-03-22 10:12:20 +0000 | [diff] [blame] | 1589 | #define BTRFS_INODE_COMPRESS (1 << 11) |
Christoph Hellwig | 6cbff00 | 2009-04-17 10:37:41 +0200 | [diff] [blame] | 1590 | |
Li Zefan | 08fe4db | 2011-03-28 02:01:25 +0000 | [diff] [blame] | 1591 | #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) |
| 1592 | |
Chris Mason | cfed81a | 2012-03-03 07:40:03 -0500 | [diff] [blame] | 1593 | struct btrfs_map_token { |
| 1594 | struct extent_buffer *eb; |
| 1595 | char *kaddr; |
| 1596 | unsigned long offset; |
| 1597 | }; |
| 1598 | |
| 1599 | static inline void btrfs_init_map_token (struct btrfs_map_token *token) |
| 1600 | { |
| 1601 | memset(token, 0, sizeof(*token)); |
| 1602 | } |
| 1603 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1604 | /* some macros to generate set/get funcs for the struct fields. This |
| 1605 | * assumes there is a lefoo_to_cpu for every type, so lets make a simple |
| 1606 | * one for u8: |
| 1607 | */ |
| 1608 | #define le8_to_cpu(v) (v) |
| 1609 | #define cpu_to_le8(v) (v) |
| 1610 | #define __le8 u8 |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 1611 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1612 | #define read_eb_member(eb, ptr, type, member, result) ( \ |
| 1613 | read_extent_buffer(eb, (char *)(result), \ |
| 1614 | ((unsigned long)(ptr)) + \ |
| 1615 | offsetof(type, member), \ |
| 1616 | sizeof(((type *)0)->member))) |
| 1617 | |
| 1618 | #define write_eb_member(eb, ptr, type, member, result) ( \ |
| 1619 | write_extent_buffer(eb, (char *)(result), \ |
| 1620 | ((unsigned long)(ptr)) + \ |
| 1621 | offsetof(type, member), \ |
| 1622 | sizeof(((type *)0)->member))) |
| 1623 | |
Chris Mason | 0f82731 | 2007-10-15 16:18:56 -0400 | [diff] [blame] | 1624 | #ifndef BTRFS_SETGET_FUNCS |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1625 | #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ |
Chris Mason | 0f82731 | 2007-10-15 16:18:56 -0400 | [diff] [blame] | 1626 | u##bits btrfs_##name(struct extent_buffer *eb, type *s); \ |
Chris Mason | cfed81a | 2012-03-03 07:40:03 -0500 | [diff] [blame] | 1627 | u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, struct btrfs_map_token *token); \ |
| 1628 | void btrfs_set_token_##name(struct extent_buffer *eb, type *s, u##bits val, struct btrfs_map_token *token);\ |
Chris Mason | 0f82731 | 2007-10-15 16:18:56 -0400 | [diff] [blame] | 1629 | void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); |
| 1630 | #endif |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 1631 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1632 | #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ |
| 1633 | static inline u##bits btrfs_##name(struct extent_buffer *eb) \ |
| 1634 | { \ |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 1635 | type *p = page_address(eb->pages[0]); \ |
David Miller | df68b8a | 2008-02-15 10:40:52 -0500 | [diff] [blame] | 1636 | u##bits res = le##bits##_to_cpu(p->member); \ |
Chris Mason | 810191f | 2007-10-15 16:18:55 -0400 | [diff] [blame] | 1637 | return res; \ |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1638 | } \ |
| 1639 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ |
| 1640 | u##bits val) \ |
| 1641 | { \ |
Chris Mason | 727011e | 2010-08-06 13:21:20 -0400 | [diff] [blame] | 1642 | type *p = page_address(eb->pages[0]); \ |
David Miller | df68b8a | 2008-02-15 10:40:52 -0500 | [diff] [blame] | 1643 | p->member = cpu_to_le##bits(val); \ |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 1644 | } |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1645 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1646 | #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ |
| 1647 | static inline u##bits btrfs_##name(type *s) \ |
| 1648 | { \ |
| 1649 | return le##bits##_to_cpu(s->member); \ |
| 1650 | } \ |
| 1651 | static inline void btrfs_set_##name(type *s, u##bits val) \ |
| 1652 | { \ |
| 1653 | s->member = cpu_to_le##bits(val); \ |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1654 | } |
| 1655 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1656 | BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); |
| 1657 | BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); |
| 1658 | BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); |
| 1659 | BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); |
| 1660 | BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); |
Chris Mason | c3027eb | 2008-12-08 16:40:21 -0500 | [diff] [blame] | 1661 | BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, |
| 1662 | start_offset, 64); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1663 | BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); |
| 1664 | BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 1665 | BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); |
| 1666 | BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); |
| 1667 | BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 1668 | BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1669 | |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 1670 | BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); |
| 1671 | BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, |
| 1672 | total_bytes, 64); |
| 1673 | BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, |
| 1674 | bytes_used, 64); |
| 1675 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, |
| 1676 | io_align, 32); |
| 1677 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, |
| 1678 | io_width, 32); |
| 1679 | BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, |
| 1680 | sector_size, 32); |
| 1681 | BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 1682 | BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, |
| 1683 | dev_group, 32); |
| 1684 | BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, |
| 1685 | seek_speed, 8); |
| 1686 | BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, |
| 1687 | bandwidth, 8); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 1688 | BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, |
| 1689 | generation, 64); |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 1690 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1691 | static inline char *btrfs_device_uuid(struct btrfs_dev_item *d) |
| 1692 | { |
| 1693 | return (char *)d + offsetof(struct btrfs_dev_item, uuid); |
| 1694 | } |
| 1695 | |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 1696 | static inline char *btrfs_device_fsid(struct btrfs_dev_item *d) |
| 1697 | { |
| 1698 | return (char *)d + offsetof(struct btrfs_dev_item, fsid); |
| 1699 | } |
| 1700 | |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 1701 | BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1702 | BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); |
| 1703 | BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); |
| 1704 | BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); |
| 1705 | BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); |
| 1706 | BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); |
| 1707 | BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); |
| 1708 | BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); |
Chris Mason | 321aecc | 2008-04-16 10:49:51 -0400 | [diff] [blame] | 1709 | BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1710 | BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); |
| 1711 | BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); |
| 1712 | |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 1713 | static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) |
| 1714 | { |
| 1715 | return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); |
| 1716 | } |
| 1717 | |
| 1718 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1719 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); |
| 1720 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, |
| 1721 | stripe_len, 64); |
| 1722 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, |
| 1723 | io_align, 32); |
| 1724 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, |
| 1725 | io_width, 32); |
| 1726 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, |
| 1727 | sector_size, 32); |
| 1728 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); |
| 1729 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, |
| 1730 | num_stripes, 16); |
Chris Mason | 321aecc | 2008-04-16 10:49:51 -0400 | [diff] [blame] | 1731 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, |
| 1732 | sub_stripes, 16); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1733 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); |
| 1734 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); |
| 1735 | |
| 1736 | static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, |
| 1737 | int nr) |
| 1738 | { |
| 1739 | unsigned long offset = (unsigned long)c; |
| 1740 | offset += offsetof(struct btrfs_chunk, stripe); |
| 1741 | offset += nr * sizeof(struct btrfs_stripe); |
| 1742 | return (struct btrfs_stripe *)offset; |
| 1743 | } |
| 1744 | |
Chris Mason | a443755 | 2008-04-18 10:29:38 -0400 | [diff] [blame] | 1745 | static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) |
| 1746 | { |
| 1747 | return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); |
| 1748 | } |
| 1749 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1750 | static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, |
| 1751 | struct btrfs_chunk *c, int nr) |
| 1752 | { |
| 1753 | return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); |
| 1754 | } |
| 1755 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1756 | static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, |
| 1757 | struct btrfs_chunk *c, int nr) |
| 1758 | { |
| 1759 | return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); |
| 1760 | } |
| 1761 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1762 | /* struct btrfs_block_group_item */ |
| 1763 | BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, |
| 1764 | used, 64); |
| 1765 | BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, |
| 1766 | used, 64); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1767 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, |
| 1768 | struct btrfs_block_group_item, chunk_objectid, 64); |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 1769 | |
| 1770 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1771 | struct btrfs_block_group_item, chunk_objectid, 64); |
| 1772 | BTRFS_SETGET_FUNCS(disk_block_group_flags, |
| 1773 | struct btrfs_block_group_item, flags, 64); |
| 1774 | BTRFS_SETGET_STACK_FUNCS(block_group_flags, |
| 1775 | struct btrfs_block_group_item, flags, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1776 | |
Chris Mason | 3954401 | 2007-12-12 14:38:19 -0500 | [diff] [blame] | 1777 | /* struct btrfs_inode_ref */ |
| 1778 | BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); |
Josef Bacik | aec7477 | 2008-07-24 12:12:38 -0400 | [diff] [blame] | 1779 | BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); |
Chris Mason | 3954401 | 2007-12-12 14:38:19 -0500 | [diff] [blame] | 1780 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1781 | /* struct btrfs_inode_item */ |
| 1782 | BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); |
Chris Mason | c3027eb | 2008-12-08 16:40:21 -0500 | [diff] [blame] | 1783 | BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1784 | BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1785 | BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); |
Yan Zheng | a76a3cd | 2008-10-09 11:46:29 -0400 | [diff] [blame] | 1786 | BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1787 | BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); |
| 1788 | BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); |
| 1789 | BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); |
| 1790 | BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); |
| 1791 | BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1792 | BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 1793 | BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1794 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1795 | static inline struct btrfs_timespec * |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1796 | btrfs_inode_atime(struct btrfs_inode_item *inode_item) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1797 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1798 | unsigned long ptr = (unsigned long)inode_item; |
| 1799 | ptr += offsetof(struct btrfs_inode_item, atime); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1800 | return (struct btrfs_timespec *)ptr; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1801 | } |
| 1802 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1803 | static inline struct btrfs_timespec * |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1804 | btrfs_inode_mtime(struct btrfs_inode_item *inode_item) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1805 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1806 | unsigned long ptr = (unsigned long)inode_item; |
| 1807 | ptr += offsetof(struct btrfs_inode_item, mtime); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1808 | return (struct btrfs_timespec *)ptr; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1809 | } |
| 1810 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1811 | static inline struct btrfs_timespec * |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1812 | btrfs_inode_ctime(struct btrfs_inode_item *inode_item) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1813 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1814 | unsigned long ptr = (unsigned long)inode_item; |
| 1815 | ptr += offsetof(struct btrfs_inode_item, ctime); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1816 | return (struct btrfs_timespec *)ptr; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1817 | } |
| 1818 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1819 | BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); |
| 1820 | BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1821 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1822 | /* struct btrfs_dev_extent */ |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 1823 | BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, |
| 1824 | chunk_tree, 64); |
| 1825 | BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, |
| 1826 | chunk_objectid, 64); |
| 1827 | BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, |
| 1828 | chunk_offset, 64); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1829 | BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); |
| 1830 | |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 1831 | static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) |
| 1832 | { |
| 1833 | unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); |
| 1834 | return (u8 *)((unsigned long)dev + ptr); |
| 1835 | } |
| 1836 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1837 | BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); |
| 1838 | BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, |
| 1839 | generation, 64); |
| 1840 | BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); |
Chris Mason | 74493f7 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 1841 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1842 | BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1843 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1844 | |
| 1845 | BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); |
| 1846 | |
| 1847 | static inline void btrfs_tree_block_key(struct extent_buffer *eb, |
| 1848 | struct btrfs_tree_block_info *item, |
| 1849 | struct btrfs_disk_key *key) |
| 1850 | { |
| 1851 | read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); |
| 1852 | } |
| 1853 | |
| 1854 | static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, |
| 1855 | struct btrfs_tree_block_info *item, |
| 1856 | struct btrfs_disk_key *key) |
| 1857 | { |
| 1858 | write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); |
| 1859 | } |
| 1860 | |
| 1861 | BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, |
| 1862 | root, 64); |
| 1863 | BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, |
| 1864 | objectid, 64); |
| 1865 | BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, |
| 1866 | offset, 64); |
| 1867 | BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, |
| 1868 | count, 32); |
| 1869 | |
| 1870 | BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, |
| 1871 | count, 32); |
| 1872 | |
| 1873 | BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, |
| 1874 | type, 8); |
| 1875 | BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, |
| 1876 | offset, 64); |
| 1877 | |
| 1878 | static inline u32 btrfs_extent_inline_ref_size(int type) |
| 1879 | { |
| 1880 | if (type == BTRFS_TREE_BLOCK_REF_KEY || |
| 1881 | type == BTRFS_SHARED_BLOCK_REF_KEY) |
| 1882 | return sizeof(struct btrfs_extent_inline_ref); |
| 1883 | if (type == BTRFS_SHARED_DATA_REF_KEY) |
| 1884 | return sizeof(struct btrfs_shared_data_ref) + |
| 1885 | sizeof(struct btrfs_extent_inline_ref); |
| 1886 | if (type == BTRFS_EXTENT_DATA_REF_KEY) |
| 1887 | return sizeof(struct btrfs_extent_data_ref) + |
| 1888 | offsetof(struct btrfs_extent_inline_ref, offset); |
| 1889 | BUG(); |
| 1890 | return 0; |
| 1891 | } |
| 1892 | |
| 1893 | BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); |
| 1894 | BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, |
| 1895 | generation, 64); |
| 1896 | BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); |
| 1897 | BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1898 | |
| 1899 | /* struct btrfs_node */ |
| 1900 | BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); |
Chris Mason | 74493f7 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 1901 | BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1902 | |
| 1903 | static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1904 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1905 | unsigned long ptr; |
| 1906 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 1907 | sizeof(struct btrfs_key_ptr) * nr; |
| 1908 | return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1909 | } |
| 1910 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1911 | static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, |
| 1912 | int nr, u64 val) |
Chris Mason | 31f3c99 | 2007-04-30 15:25:45 -0400 | [diff] [blame] | 1913 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1914 | unsigned long ptr; |
| 1915 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 1916 | sizeof(struct btrfs_key_ptr) * nr; |
| 1917 | btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); |
Chris Mason | 31f3c99 | 2007-04-30 15:25:45 -0400 | [diff] [blame] | 1918 | } |
| 1919 | |
Chris Mason | 74493f7 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 1920 | static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) |
| 1921 | { |
| 1922 | unsigned long ptr; |
| 1923 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 1924 | sizeof(struct btrfs_key_ptr) * nr; |
| 1925 | return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); |
| 1926 | } |
| 1927 | |
| 1928 | static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, |
| 1929 | int nr, u64 val) |
| 1930 | { |
| 1931 | unsigned long ptr; |
| 1932 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 1933 | sizeof(struct btrfs_key_ptr) * nr; |
| 1934 | btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); |
| 1935 | } |
| 1936 | |
Chris Mason | 810191f | 2007-10-15 16:18:55 -0400 | [diff] [blame] | 1937 | static inline unsigned long btrfs_node_key_ptr_offset(int nr) |
Chris Mason | 31f3c99 | 2007-04-30 15:25:45 -0400 | [diff] [blame] | 1938 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1939 | return offsetof(struct btrfs_node, ptrs) + |
| 1940 | sizeof(struct btrfs_key_ptr) * nr; |
Chris Mason | 31f3c99 | 2007-04-30 15:25:45 -0400 | [diff] [blame] | 1941 | } |
| 1942 | |
Chris Mason | e644d02 | 2007-11-06 15:09:29 -0500 | [diff] [blame] | 1943 | void btrfs_node_key(struct extent_buffer *eb, |
| 1944 | struct btrfs_disk_key *disk_key, int nr); |
| 1945 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1946 | static inline void btrfs_set_node_key(struct extent_buffer *eb, |
| 1947 | struct btrfs_disk_key *disk_key, int nr) |
| 1948 | { |
| 1949 | unsigned long ptr; |
| 1950 | ptr = btrfs_node_key_ptr_offset(nr); |
| 1951 | write_eb_member(eb, (struct btrfs_key_ptr *)ptr, |
| 1952 | struct btrfs_key_ptr, key, disk_key); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1953 | } |
| 1954 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1955 | /* struct btrfs_item */ |
| 1956 | BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); |
| 1957 | BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); |
| 1958 | |
| 1959 | static inline unsigned long btrfs_item_nr_offset(int nr) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1960 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1961 | return offsetof(struct btrfs_leaf, items) + |
| 1962 | sizeof(struct btrfs_item) * nr; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1963 | } |
| 1964 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1965 | static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb, |
| 1966 | int nr) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1967 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1968 | return (struct btrfs_item *)btrfs_item_nr_offset(nr); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1969 | } |
| 1970 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1971 | static inline u32 btrfs_item_end(struct extent_buffer *eb, |
| 1972 | struct btrfs_item *item) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1973 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1974 | return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1975 | } |
| 1976 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1977 | 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] | 1978 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1979 | return btrfs_item_end(eb, btrfs_item_nr(eb, nr)); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1980 | } |
| 1981 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1982 | 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] | 1983 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1984 | return btrfs_item_offset(eb, btrfs_item_nr(eb, nr)); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1985 | } |
| 1986 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1987 | 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] | 1988 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1989 | return btrfs_item_size(eb, btrfs_item_nr(eb, nr)); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1990 | } |
| 1991 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1992 | static inline void btrfs_item_key(struct extent_buffer *eb, |
| 1993 | struct btrfs_disk_key *disk_key, int nr) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1994 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1995 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
| 1996 | read_eb_member(eb, item, struct btrfs_item, key, disk_key); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1997 | } |
| 1998 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1999 | static inline void btrfs_set_item_key(struct extent_buffer *eb, |
| 2000 | struct btrfs_disk_key *disk_key, int nr) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 2001 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2002 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
| 2003 | write_eb_member(eb, item, struct btrfs_item, key, disk_key); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 2004 | } |
| 2005 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2006 | BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); |
| 2007 | |
Chris Mason | 0660b5a | 2008-11-17 20:37:39 -0500 | [diff] [blame] | 2008 | /* |
| 2009 | * struct btrfs_root_ref |
| 2010 | */ |
| 2011 | BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); |
| 2012 | BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); |
| 2013 | BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); |
| 2014 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2015 | /* struct btrfs_dir_item */ |
Josef Bacik | 5103e94 | 2007-11-16 11:45:54 -0500 | [diff] [blame] | 2016 | 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] | 2017 | BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); |
| 2018 | BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2019 | BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2020 | |
| 2021 | static inline void btrfs_dir_item_key(struct extent_buffer *eb, |
| 2022 | struct btrfs_dir_item *item, |
| 2023 | struct btrfs_disk_key *key) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 2024 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2025 | read_eb_member(eb, item, struct btrfs_dir_item, location, key); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 2026 | } |
| 2027 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2028 | static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, |
| 2029 | struct btrfs_dir_item *item, |
| 2030 | struct btrfs_disk_key *key) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 2031 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2032 | write_eb_member(eb, item, struct btrfs_dir_item, location, key); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 2033 | } |
| 2034 | |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 2035 | BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, |
| 2036 | num_entries, 64); |
| 2037 | BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, |
| 2038 | num_bitmaps, 64); |
| 2039 | BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, |
| 2040 | generation, 64); |
| 2041 | |
| 2042 | static inline void btrfs_free_space_key(struct extent_buffer *eb, |
| 2043 | struct btrfs_free_space_header *h, |
| 2044 | struct btrfs_disk_key *key) |
| 2045 | { |
| 2046 | read_eb_member(eb, h, struct btrfs_free_space_header, location, key); |
| 2047 | } |
| 2048 | |
| 2049 | static inline void btrfs_set_free_space_key(struct extent_buffer *eb, |
| 2050 | struct btrfs_free_space_header *h, |
| 2051 | struct btrfs_disk_key *key) |
| 2052 | { |
| 2053 | write_eb_member(eb, h, struct btrfs_free_space_header, location, key); |
| 2054 | } |
| 2055 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2056 | /* struct btrfs_disk_key */ |
| 2057 | BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, |
| 2058 | objectid, 64); |
| 2059 | BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); |
| 2060 | 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] | 2061 | |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 2062 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
| 2063 | struct btrfs_disk_key *disk) |
| 2064 | { |
| 2065 | cpu->offset = le64_to_cpu(disk->offset); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2066 | cpu->type = disk->type; |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 2067 | cpu->objectid = le64_to_cpu(disk->objectid); |
| 2068 | } |
| 2069 | |
| 2070 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, |
| 2071 | struct btrfs_key *cpu) |
| 2072 | { |
| 2073 | disk->offset = cpu_to_le64(cpu->offset); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2074 | disk->type = cpu->type; |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 2075 | disk->objectid = cpu_to_le64(cpu->objectid); |
| 2076 | } |
| 2077 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2078 | static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, |
| 2079 | struct btrfs_key *key, int nr) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 2080 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2081 | struct btrfs_disk_key disk_key; |
| 2082 | btrfs_node_key(eb, &disk_key, nr); |
| 2083 | btrfs_disk_key_to_cpu(key, &disk_key); |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 2084 | } |
| 2085 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2086 | static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, |
| 2087 | struct btrfs_key *key, int nr) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 2088 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2089 | struct btrfs_disk_key disk_key; |
| 2090 | btrfs_item_key(eb, &disk_key, nr); |
| 2091 | btrfs_disk_key_to_cpu(key, &disk_key); |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 2092 | } |
| 2093 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2094 | static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, |
| 2095 | struct btrfs_dir_item *item, |
| 2096 | struct btrfs_key *key) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 2097 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2098 | struct btrfs_disk_key disk_key; |
| 2099 | btrfs_dir_item_key(eb, item, &disk_key); |
| 2100 | btrfs_disk_key_to_cpu(key, &disk_key); |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 2101 | } |
| 2102 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2103 | |
| 2104 | static inline u8 btrfs_key_type(struct btrfs_key *key) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 2105 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2106 | return key->type; |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 2107 | } |
| 2108 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2109 | 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] | 2110 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2111 | key->type = val; |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 2112 | } |
| 2113 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2114 | /* struct btrfs_header */ |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2115 | BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2116 | BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, |
| 2117 | generation, 64); |
| 2118 | BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); |
| 2119 | BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); |
Chris Mason | 63b10fc | 2008-04-01 11:21:32 -0400 | [diff] [blame] | 2120 | BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2121 | BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); |
| 2122 | |
Chris Mason | 63b10fc | 2008-04-01 11:21:32 -0400 | [diff] [blame] | 2123 | static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) |
| 2124 | { |
| 2125 | return (btrfs_header_flags(eb) & flag) == flag; |
| 2126 | } |
| 2127 | |
| 2128 | static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) |
| 2129 | { |
| 2130 | u64 flags = btrfs_header_flags(eb); |
| 2131 | btrfs_set_header_flags(eb, flags | flag); |
| 2132 | return (flags & flag) == flag; |
| 2133 | } |
| 2134 | |
| 2135 | static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) |
| 2136 | { |
| 2137 | u64 flags = btrfs_header_flags(eb); |
| 2138 | btrfs_set_header_flags(eb, flags & ~flag); |
| 2139 | return (flags & flag) == flag; |
| 2140 | } |
| 2141 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2142 | static inline int btrfs_header_backref_rev(struct extent_buffer *eb) |
| 2143 | { |
| 2144 | u64 flags = btrfs_header_flags(eb); |
| 2145 | return flags >> BTRFS_BACKREF_REV_SHIFT; |
| 2146 | } |
| 2147 | |
| 2148 | static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, |
| 2149 | int rev) |
| 2150 | { |
| 2151 | u64 flags = btrfs_header_flags(eb); |
| 2152 | flags &= ~BTRFS_BACKREF_REV_MASK; |
| 2153 | flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; |
| 2154 | btrfs_set_header_flags(eb, flags); |
| 2155 | } |
| 2156 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2157 | static inline u8 *btrfs_header_fsid(struct extent_buffer *eb) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 2158 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2159 | unsigned long ptr = offsetof(struct btrfs_header, fsid); |
| 2160 | return (u8 *)ptr; |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 2161 | } |
| 2162 | |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 2163 | static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb) |
| 2164 | { |
| 2165 | unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid); |
| 2166 | return (u8 *)ptr; |
| 2167 | } |
| 2168 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2169 | static inline int btrfs_is_leaf(struct extent_buffer *eb) |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 2170 | { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2171 | return btrfs_header_level(eb) == 0; |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 2172 | } |
| 2173 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2174 | /* struct btrfs_root_item */ |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2175 | BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, |
| 2176 | generation, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2177 | BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2178 | BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); |
| 2179 | BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2180 | |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2181 | BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, |
| 2182 | generation, 64); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2183 | BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); |
| 2184 | BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2185 | BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); |
| 2186 | BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2187 | BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2188 | BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); |
| 2189 | BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); |
Yan Zheng | 80ff385 | 2008-10-30 14:20:02 -0400 | [diff] [blame] | 2190 | BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, |
| 2191 | last_snapshot, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2192 | |
Li Zefan | b83cc96 | 2010-12-20 16:04:08 +0800 | [diff] [blame] | 2193 | static inline bool btrfs_root_readonly(struct btrfs_root *root) |
| 2194 | { |
Al Viro | 6ed3cf2 | 2012-04-13 11:49:04 -0400 | [diff] [blame] | 2195 | return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; |
Li Zefan | b83cc96 | 2010-12-20 16:04:08 +0800 | [diff] [blame] | 2196 | } |
| 2197 | |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2198 | /* struct btrfs_root_backup */ |
| 2199 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, |
| 2200 | tree_root, 64); |
| 2201 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, |
| 2202 | tree_root_gen, 64); |
| 2203 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, |
| 2204 | tree_root_level, 8); |
| 2205 | |
| 2206 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, |
| 2207 | chunk_root, 64); |
| 2208 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, |
| 2209 | chunk_root_gen, 64); |
| 2210 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, |
| 2211 | chunk_root_level, 8); |
| 2212 | |
| 2213 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, |
| 2214 | extent_root, 64); |
| 2215 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, |
| 2216 | extent_root_gen, 64); |
| 2217 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, |
| 2218 | extent_root_level, 8); |
| 2219 | |
| 2220 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, |
| 2221 | fs_root, 64); |
| 2222 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, |
| 2223 | fs_root_gen, 64); |
| 2224 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, |
| 2225 | fs_root_level, 8); |
| 2226 | |
| 2227 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, |
| 2228 | dev_root, 64); |
| 2229 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, |
| 2230 | dev_root_gen, 64); |
| 2231 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, |
| 2232 | dev_root_level, 8); |
| 2233 | |
| 2234 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, |
| 2235 | csum_root, 64); |
| 2236 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, |
| 2237 | csum_root_gen, 64); |
| 2238 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, |
| 2239 | csum_root_level, 8); |
| 2240 | BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, |
| 2241 | total_bytes, 64); |
| 2242 | BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, |
| 2243 | bytes_used, 64); |
| 2244 | BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, |
| 2245 | num_devices, 64); |
| 2246 | |
Ilya Dryomov | 0940ebf | 2012-01-16 22:04:48 +0200 | [diff] [blame] | 2247 | /* struct btrfs_balance_item */ |
| 2248 | BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 2249 | |
Ilya Dryomov | 0940ebf | 2012-01-16 22:04:48 +0200 | [diff] [blame] | 2250 | static inline void btrfs_balance_data(struct extent_buffer *eb, |
| 2251 | struct btrfs_balance_item *bi, |
| 2252 | struct btrfs_disk_balance_args *ba) |
| 2253 | { |
| 2254 | read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); |
| 2255 | } |
| 2256 | |
| 2257 | static inline void btrfs_set_balance_data(struct extent_buffer *eb, |
| 2258 | struct btrfs_balance_item *bi, |
| 2259 | struct btrfs_disk_balance_args *ba) |
| 2260 | { |
| 2261 | write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); |
| 2262 | } |
| 2263 | |
| 2264 | static inline void btrfs_balance_meta(struct extent_buffer *eb, |
| 2265 | struct btrfs_balance_item *bi, |
| 2266 | struct btrfs_disk_balance_args *ba) |
| 2267 | { |
| 2268 | read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); |
| 2269 | } |
| 2270 | |
| 2271 | static inline void btrfs_set_balance_meta(struct extent_buffer *eb, |
| 2272 | struct btrfs_balance_item *bi, |
| 2273 | struct btrfs_disk_balance_args *ba) |
| 2274 | { |
| 2275 | write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); |
| 2276 | } |
| 2277 | |
| 2278 | static inline void btrfs_balance_sys(struct extent_buffer *eb, |
| 2279 | struct btrfs_balance_item *bi, |
| 2280 | struct btrfs_disk_balance_args *ba) |
| 2281 | { |
| 2282 | read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); |
| 2283 | } |
| 2284 | |
| 2285 | static inline void btrfs_set_balance_sys(struct extent_buffer *eb, |
| 2286 | struct btrfs_balance_item *bi, |
| 2287 | struct btrfs_disk_balance_args *ba) |
| 2288 | { |
| 2289 | write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); |
| 2290 | } |
| 2291 | |
| 2292 | static inline void |
| 2293 | btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, |
| 2294 | struct btrfs_disk_balance_args *disk) |
| 2295 | { |
| 2296 | memset(cpu, 0, sizeof(*cpu)); |
| 2297 | |
| 2298 | cpu->profiles = le64_to_cpu(disk->profiles); |
| 2299 | cpu->usage = le64_to_cpu(disk->usage); |
| 2300 | cpu->devid = le64_to_cpu(disk->devid); |
| 2301 | cpu->pstart = le64_to_cpu(disk->pstart); |
| 2302 | cpu->pend = le64_to_cpu(disk->pend); |
| 2303 | cpu->vstart = le64_to_cpu(disk->vstart); |
| 2304 | cpu->vend = le64_to_cpu(disk->vend); |
| 2305 | cpu->target = le64_to_cpu(disk->target); |
| 2306 | cpu->flags = le64_to_cpu(disk->flags); |
| 2307 | } |
| 2308 | |
| 2309 | static inline void |
| 2310 | btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, |
| 2311 | struct btrfs_balance_args *cpu) |
| 2312 | { |
| 2313 | memset(disk, 0, sizeof(*disk)); |
| 2314 | |
| 2315 | disk->profiles = cpu_to_le64(cpu->profiles); |
| 2316 | disk->usage = cpu_to_le64(cpu->usage); |
| 2317 | disk->devid = cpu_to_le64(cpu->devid); |
| 2318 | disk->pstart = cpu_to_le64(cpu->pstart); |
| 2319 | disk->pend = cpu_to_le64(cpu->pend); |
| 2320 | disk->vstart = cpu_to_le64(cpu->vstart); |
| 2321 | disk->vend = cpu_to_le64(cpu->vend); |
| 2322 | disk->target = cpu_to_le64(cpu->target); |
| 2323 | disk->flags = cpu_to_le64(cpu->flags); |
| 2324 | } |
| 2325 | |
| 2326 | /* struct btrfs_super_block */ |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2327 | BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2328 | BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2329 | BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, |
| 2330 | generation, 64); |
| 2331 | BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2332 | BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, |
| 2333 | struct btrfs_super_block, sys_chunk_array_size, 32); |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2334 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, |
| 2335 | struct btrfs_super_block, chunk_root_generation, 64); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2336 | BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, |
| 2337 | root_level, 8); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2338 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, |
| 2339 | chunk_root, 64); |
| 2340 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2341 | chunk_root_level, 8); |
| 2342 | BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, |
| 2343 | log_root, 64); |
Chris Mason | c3027eb | 2008-12-08 16:40:21 -0500 | [diff] [blame] | 2344 | BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, |
| 2345 | log_root_transid, 64); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2346 | BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, |
| 2347 | log_root_level, 8); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2348 | BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, |
| 2349 | total_bytes, 64); |
| 2350 | BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, |
| 2351 | bytes_used, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2352 | BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, |
| 2353 | sectorsize, 32); |
| 2354 | BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, |
| 2355 | nodesize, 32); |
| 2356 | BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, |
| 2357 | leafsize, 32); |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 2358 | BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, |
| 2359 | stripesize, 32); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2360 | BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, |
| 2361 | root_dir_objectid, 64); |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 2362 | BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, |
| 2363 | num_devices, 64); |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2364 | BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, |
| 2365 | compat_flags, 64); |
| 2366 | BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, |
Josef Bacik | 1253483 | 2009-12-17 21:32:27 +0000 | [diff] [blame] | 2367 | compat_ro_flags, 64); |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2368 | BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, |
| 2369 | incompat_flags, 64); |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 2370 | BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, |
| 2371 | csum_type, 16); |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 2372 | BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, |
| 2373 | cache_generation, 64); |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 2374 | |
| 2375 | static inline int btrfs_super_csum_size(struct btrfs_super_block *s) |
| 2376 | { |
| 2377 | int t = btrfs_super_csum_type(s); |
| 2378 | BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes)); |
| 2379 | return btrfs_csum_sizes[t]; |
| 2380 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2381 | |
| 2382 | static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) |
Chris Mason | 7f5c151 | 2007-03-23 15:56:19 -0400 | [diff] [blame] | 2383 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2384 | return offsetof(struct btrfs_leaf, items); |
Chris Mason | 7f5c151 | 2007-03-23 15:56:19 -0400 | [diff] [blame] | 2385 | } |
| 2386 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2387 | /* struct btrfs_file_extent_item */ |
| 2388 | 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] | 2389 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2390 | static inline unsigned long |
| 2391 | btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e) |
Chris Mason | 236454d | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 2392 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2393 | unsigned long offset = (unsigned long)e; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2394 | offset += offsetof(struct btrfs_file_extent_item, disk_bytenr); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2395 | return offset; |
Chris Mason | 236454d | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 2396 | } |
| 2397 | |
| 2398 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) |
| 2399 | { |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2400 | return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize; |
Chris Mason | 236454d | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 2401 | } |
| 2402 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2403 | BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, |
| 2404 | disk_bytenr, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2405 | BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, |
| 2406 | generation, 64); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2407 | BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, |
| 2408 | disk_num_bytes, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2409 | BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, |
| 2410 | offset, 64); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2411 | BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, |
| 2412 | num_bytes, 64); |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 2413 | BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, |
| 2414 | ram_bytes, 64); |
| 2415 | BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, |
| 2416 | compression, 8); |
| 2417 | BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, |
| 2418 | encryption, 8); |
| 2419 | BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, |
| 2420 | other_encoding, 16); |
| 2421 | |
| 2422 | /* this returns the number of file bytes represented by the inline item. |
| 2423 | * If an item is compressed, this is the uncompressed size |
| 2424 | */ |
| 2425 | static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, |
| 2426 | struct btrfs_file_extent_item *e) |
| 2427 | { |
| 2428 | return btrfs_file_extent_ram_bytes(eb, e); |
| 2429 | } |
| 2430 | |
| 2431 | /* |
| 2432 | * this returns the number of bytes used by the item on disk, minus the |
| 2433 | * size of any extent headers. If a file is compressed on disk, this is |
| 2434 | * the compressed size |
| 2435 | */ |
| 2436 | static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb, |
| 2437 | struct btrfs_item *e) |
| 2438 | { |
| 2439 | unsigned long offset; |
| 2440 | offset = offsetof(struct btrfs_file_extent_item, disk_bytenr); |
| 2441 | return btrfs_item_size(eb, e) - offset; |
| 2442 | } |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 2443 | |
Stefan Behrens | 733f4fb | 2012-05-25 16:06:10 +0200 | [diff] [blame] | 2444 | /* btrfs_dev_stats_item */ |
| 2445 | static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb, |
| 2446 | struct btrfs_dev_stats_item *ptr, |
| 2447 | int index) |
| 2448 | { |
| 2449 | u64 val; |
| 2450 | |
| 2451 | read_extent_buffer(eb, &val, |
| 2452 | offsetof(struct btrfs_dev_stats_item, values) + |
| 2453 | ((unsigned long)ptr) + (index * sizeof(u64)), |
| 2454 | sizeof(val)); |
| 2455 | return val; |
| 2456 | } |
| 2457 | |
| 2458 | static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb, |
| 2459 | struct btrfs_dev_stats_item *ptr, |
| 2460 | int index, u64 val) |
| 2461 | { |
| 2462 | write_extent_buffer(eb, &val, |
| 2463 | offsetof(struct btrfs_dev_stats_item, values) + |
| 2464 | ((unsigned long)ptr) + (index * sizeof(u64)), |
| 2465 | sizeof(val)); |
| 2466 | } |
| 2467 | |
Al Viro | 815745c | 2011-11-17 15:40:49 -0500 | [diff] [blame] | 2468 | static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 2469 | { |
| 2470 | return sb->s_fs_info; |
| 2471 | } |
| 2472 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2473 | static inline u32 btrfs_level_size(struct btrfs_root *root, int level) |
| 2474 | { |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2475 | if (level == 0) |
| 2476 | return root->leafsize; |
| 2477 | return root->nodesize; |
| 2478 | } |
| 2479 | |
Chris Mason | 4beb1b8 | 2007-03-14 10:31:29 -0400 | [diff] [blame] | 2480 | /* helper function to cast into the data area of the leaf. */ |
| 2481 | #define btrfs_item_ptr(leaf, slot, type) \ |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 2482 | ((type *)(btrfs_leaf_data(leaf) + \ |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2483 | btrfs_item_offset_nr(leaf, slot))) |
| 2484 | |
| 2485 | #define btrfs_item_ptr_offset(leaf, slot) \ |
| 2486 | ((unsigned long)(btrfs_leaf_data(leaf) + \ |
| 2487 | btrfs_item_offset_nr(leaf, slot))) |
Chris Mason | 4beb1b8 | 2007-03-14 10:31:29 -0400 | [diff] [blame] | 2488 | |
Chris Mason | 2b1f55b | 2008-09-24 11:48:04 -0400 | [diff] [blame] | 2489 | static inline struct dentry *fdentry(struct file *file) |
| 2490 | { |
Chris Mason | 6da6aba | 2007-12-18 16:15:09 -0500 | [diff] [blame] | 2491 | return file->f_path.dentry; |
Chris Mason | 6da6aba | 2007-12-18 16:15:09 -0500 | [diff] [blame] | 2492 | } |
| 2493 | |
Josef Bacik | 6737773 | 2010-09-16 16:19:09 -0400 | [diff] [blame] | 2494 | static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) |
| 2495 | { |
| 2496 | return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && |
| 2497 | (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); |
| 2498 | } |
| 2499 | |
Josef Bacik | 3b16a4e | 2011-09-21 15:05:58 -0400 | [diff] [blame] | 2500 | static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) |
| 2501 | { |
| 2502 | return mapping_gfp_mask(mapping) & ~__GFP_FS; |
| 2503 | } |
| 2504 | |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 2505 | /* extent-tree.c */ |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2506 | static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root, |
Josef Bacik | 9e0baf6 | 2011-07-15 15:16:44 +0000 | [diff] [blame] | 2507 | unsigned num_items) |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2508 | { |
| 2509 | return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) * |
| 2510 | 3 * num_items; |
| 2511 | } |
| 2512 | |
Josef Bacik | 0712718 | 2011-08-19 10:29:59 -0400 | [diff] [blame] | 2513 | /* |
| 2514 | * Doing a truncate won't result in new nodes or leaves, just what we need for |
| 2515 | * COW. |
| 2516 | */ |
| 2517 | static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root, |
| 2518 | unsigned num_items) |
| 2519 | { |
| 2520 | return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) * |
| 2521 | num_items; |
| 2522 | } |
| 2523 | |
Chris Mason | fa9c0d79 | 2009-04-03 09:47:43 -0400 | [diff] [blame] | 2524 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); |
Chris Mason | 56bec29 | 2009-03-13 10:10:06 -0400 | [diff] [blame] | 2525 | int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, |
| 2526 | struct btrfs_root *root, unsigned long count); |
Zheng Yan | 31840ae | 2008-09-23 13:14:14 -0400 | [diff] [blame] | 2527 | int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len); |
Yan, Zheng | a22285a | 2010-05-16 10:48:46 -0400 | [diff] [blame] | 2528 | int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, |
| 2529 | struct btrfs_root *root, u64 bytenr, |
| 2530 | u64 num_bytes, u64 *refs, u64 *flags); |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 2531 | int btrfs_pin_extent(struct btrfs_root *root, |
| 2532 | u64 bytenr, u64 num, int reserved); |
Chris Mason | e688b725 | 2011-10-31 20:52:39 -0400 | [diff] [blame] | 2533 | int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans, |
| 2534 | struct btrfs_root *root, |
| 2535 | u64 bytenr, u64 num_bytes); |
Yan Zheng | 80ff385 | 2008-10-30 14:20:02 -0400 | [diff] [blame] | 2536 | int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans, |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2537 | struct btrfs_root *root, |
| 2538 | u64 objectid, u64 offset, u64 bytenr); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2539 | struct btrfs_block_group_cache *btrfs_lookup_block_group( |
| 2540 | struct btrfs_fs_info *info, |
| 2541 | u64 bytenr); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2542 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); |
Yan Zheng | d2fb343 | 2008-12-11 16:30:39 -0500 | [diff] [blame] | 2543 | u64 btrfs_find_block_group(struct btrfs_root *root, |
| 2544 | u64 search_start, u64 search_hint, int owner); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2545 | struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2546 | struct btrfs_root *root, u32 blocksize, |
| 2547 | u64 parent, u64 root_objectid, |
| 2548 | struct btrfs_disk_key *key, int level, |
Jan Schmidt | 5581a51 | 2012-05-16 17:04:52 +0200 | [diff] [blame] | 2549 | u64 hint, u64 empty_size); |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 2550 | void btrfs_free_tree_block(struct btrfs_trans_handle *trans, |
| 2551 | struct btrfs_root *root, |
| 2552 | struct extent_buffer *buf, |
Jan Schmidt | 5581a51 | 2012-05-16 17:04:52 +0200 | [diff] [blame] | 2553 | u64 parent, int last_ref); |
Chris Mason | 65b51a0 | 2008-08-01 15:11:20 -0400 | [diff] [blame] | 2554 | struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans, |
| 2555 | struct btrfs_root *root, |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 2556 | u64 bytenr, u32 blocksize, |
| 2557 | int level); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2558 | int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, |
| 2559 | struct btrfs_root *root, |
| 2560 | u64 root_objectid, u64 owner, |
| 2561 | u64 offset, struct btrfs_key *ins); |
| 2562 | int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, |
| 2563 | struct btrfs_root *root, |
| 2564 | u64 root_objectid, u64 owner, u64 offset, |
| 2565 | struct btrfs_key *ins); |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 2566 | int btrfs_reserve_extent(struct btrfs_trans_handle *trans, |
| 2567 | struct btrfs_root *root, |
| 2568 | u64 num_bytes, u64 min_alloc_size, |
| 2569 | u64 empty_size, u64 hint_byte, |
Josef Bacik | 81c9ad2 | 2012-01-18 10:56:06 -0500 | [diff] [blame] | 2570 | struct btrfs_key *ins, u64 data); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 2571 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
Arne Jansen | 66d7e7f | 2011-09-12 15:26:38 +0200 | [diff] [blame] | 2572 | struct extent_buffer *buf, int full_backref, int for_cow); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2573 | int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
Arne Jansen | 66d7e7f | 2011-09-12 15:26:38 +0200 | [diff] [blame] | 2574 | struct extent_buffer *buf, int full_backref, int for_cow); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2575 | int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, |
| 2576 | struct btrfs_root *root, |
| 2577 | u64 bytenr, u64 num_bytes, u64 flags, |
| 2578 | int is_data); |
Zheng Yan | 31840ae | 2008-09-23 13:14:14 -0400 | [diff] [blame] | 2579 | int btrfs_free_extent(struct btrfs_trans_handle *trans, |
| 2580 | struct btrfs_root *root, |
Arne Jansen | 66d7e7f | 2011-09-12 15:26:38 +0200 | [diff] [blame] | 2581 | u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid, |
| 2582 | u64 owner, u64 offset, int for_cow); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2583 | |
Chris Mason | 65b51a0 | 2008-08-01 15:11:20 -0400 | [diff] [blame] | 2584 | int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len); |
Chris Mason | e688b725 | 2011-10-31 20:52:39 -0400 | [diff] [blame] | 2585 | int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root, |
| 2586 | u64 start, u64 len); |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 2587 | void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans, |
| 2588 | struct btrfs_root *root); |
Chris Mason | ccd467d | 2007-06-28 15:57:36 -0400 | [diff] [blame] | 2589 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 2590 | struct btrfs_root *root); |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 2591 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
Zheng Yan | 31840ae | 2008-09-23 13:14:14 -0400 | [diff] [blame] | 2592 | struct btrfs_root *root, |
| 2593 | u64 bytenr, u64 num_bytes, u64 parent, |
Arne Jansen | 66d7e7f | 2011-09-12 15:26:38 +0200 | [diff] [blame] | 2594 | u64 root_objectid, u64 owner, u64 offset, int for_cow); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2595 | |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 2596 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, |
| 2597 | struct btrfs_root *root); |
Yan Zheng | d2fb343 | 2008-12-11 16:30:39 -0500 | [diff] [blame] | 2598 | int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr); |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 2599 | int btrfs_free_block_groups(struct btrfs_fs_info *info); |
| 2600 | int btrfs_read_block_groups(struct btrfs_root *root); |
Josef Bacik | ba1bf48 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 2601 | int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2602 | int btrfs_make_block_group(struct btrfs_trans_handle *trans, |
| 2603 | struct btrfs_root *root, u64 bytes_used, |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 2604 | u64 type, u64 chunk_objectid, u64 chunk_offset, |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2605 | u64 size); |
Zheng Yan | 1a40e23 | 2008-09-26 10:09:34 -0400 | [diff] [blame] | 2606 | int btrfs_remove_block_group(struct btrfs_trans_handle *trans, |
| 2607 | struct btrfs_root *root, u64 group_start); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2608 | u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags); |
Miao Xie | 6d07bce | 2011-01-05 10:07:31 +0000 | [diff] [blame] | 2609 | u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data); |
Josef Bacik | 6a63209 | 2009-02-20 11:00:09 -0500 | [diff] [blame] | 2610 | void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde); |
Chris Mason | 4184ea7 | 2009-03-10 12:39:20 -0400 | [diff] [blame] | 2611 | void btrfs_clear_space_info_full(struct btrfs_fs_info *info); |
Yan, Zheng | 0ca1f7c | 2010-05-16 10:48:47 -0400 | [diff] [blame] | 2612 | int btrfs_check_data_free_space(struct inode *inode, u64 bytes); |
| 2613 | void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes); |
Yan, Zheng | a22285a | 2010-05-16 10:48:46 -0400 | [diff] [blame] | 2614 | void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans, |
| 2615 | struct btrfs_root *root); |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 2616 | int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans, |
| 2617 | struct inode *inode); |
| 2618 | void btrfs_orphan_release_metadata(struct inode *inode); |
Yan, Zheng | a22285a | 2010-05-16 10:48:46 -0400 | [diff] [blame] | 2619 | int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans, |
| 2620 | struct btrfs_pending_snapshot *pending); |
Yan, Zheng | 0ca1f7c | 2010-05-16 10:48:47 -0400 | [diff] [blame] | 2621 | int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes); |
| 2622 | void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes); |
| 2623 | int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes); |
| 2624 | void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes); |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 2625 | void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv); |
| 2626 | struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root); |
| 2627 | void btrfs_free_block_rsv(struct btrfs_root *root, |
| 2628 | struct btrfs_block_rsv *rsv); |
Josef Bacik | 4a92b1b | 2011-08-30 12:34:28 -0400 | [diff] [blame] | 2629 | int btrfs_block_rsv_add(struct btrfs_root *root, |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 2630 | struct btrfs_block_rsv *block_rsv, |
Josef Bacik | 8bb8ab2 | 2010-10-15 16:52:49 -0400 | [diff] [blame] | 2631 | u64 num_bytes); |
Josef Bacik | c06a0e1 | 2011-11-04 19:56:02 -0400 | [diff] [blame] | 2632 | int btrfs_block_rsv_add_noflush(struct btrfs_root *root, |
| 2633 | struct btrfs_block_rsv *block_rsv, |
| 2634 | u64 num_bytes); |
Josef Bacik | 4a92b1b | 2011-08-30 12:34:28 -0400 | [diff] [blame] | 2635 | int btrfs_block_rsv_check(struct btrfs_root *root, |
Josef Bacik | 36ba022 | 2011-10-18 12:15:48 -0400 | [diff] [blame] | 2636 | struct btrfs_block_rsv *block_rsv, int min_factor); |
| 2637 | int btrfs_block_rsv_refill(struct btrfs_root *root, |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 2638 | struct btrfs_block_rsv *block_rsv, |
Josef Bacik | 36ba022 | 2011-10-18 12:15:48 -0400 | [diff] [blame] | 2639 | u64 min_reserved); |
Miao Xie | aa38a71 | 2011-11-18 17:43:00 +0800 | [diff] [blame] | 2640 | int btrfs_block_rsv_refill_noflush(struct btrfs_root *root, |
| 2641 | struct btrfs_block_rsv *block_rsv, |
| 2642 | u64 min_reserved); |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 2643 | int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, |
| 2644 | struct btrfs_block_rsv *dst_rsv, |
| 2645 | u64 num_bytes); |
| 2646 | void btrfs_block_rsv_release(struct btrfs_root *root, |
| 2647 | struct btrfs_block_rsv *block_rsv, |
| 2648 | u64 num_bytes); |
| 2649 | int btrfs_set_block_group_ro(struct btrfs_root *root, |
| 2650 | struct btrfs_block_group_cache *cache); |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 2651 | void btrfs_set_block_group_rw(struct btrfs_root *root, |
| 2652 | struct btrfs_block_group_cache *cache); |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 2653 | void btrfs_put_block_group_cache(struct btrfs_fs_info *info); |
Miao Xie | 6d07bce | 2011-01-05 10:07:31 +0000 | [diff] [blame] | 2654 | u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 2655 | int btrfs_error_unpin_extent_range(struct btrfs_root *root, |
| 2656 | u64 start, u64 end); |
| 2657 | int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr, |
Li Dongyang | 5378e60 | 2011-03-24 10:24:27 +0000 | [diff] [blame] | 2658 | u64 num_bytes, u64 *actual_bytes); |
Chris Mason | c87f08c | 2011-02-16 13:57:04 -0500 | [diff] [blame] | 2659 | int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, |
| 2660 | struct btrfs_root *root, u64 type); |
Li Dongyang | f7039b1 | 2011-03-24 10:24:28 +0000 | [diff] [blame] | 2661 | int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 2662 | |
liubo | c59021f | 2011-03-07 02:13:14 +0000 | [diff] [blame] | 2663 | int btrfs_init_space_info(struct btrfs_fs_info *fs_info); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 2664 | /* ctree.c */ |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2665 | int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key, |
| 2666 | int level, int *slot); |
| 2667 | int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2668 | int btrfs_previous_item(struct btrfs_root *root, |
| 2669 | struct btrfs_path *path, u64 min_objectid, |
| 2670 | int type); |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 2671 | void btrfs_set_item_key_safe(struct btrfs_trans_handle *trans, |
| 2672 | struct btrfs_root *root, struct btrfs_path *path, |
| 2673 | struct btrfs_key *new_key); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 2674 | struct extent_buffer *btrfs_root_node(struct btrfs_root *root); |
| 2675 | struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); |
Chris Mason | e7a8456 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2676 | int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2677 | struct btrfs_key *key, int lowest_level, |
| 2678 | int cache_only, u64 min_trans); |
| 2679 | int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2680 | struct btrfs_key *max_key, |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2681 | struct btrfs_path *path, int cache_only, |
| 2682 | u64 min_trans); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2683 | int btrfs_cow_block(struct btrfs_trans_handle *trans, |
| 2684 | struct btrfs_root *root, struct extent_buffer *buf, |
| 2685 | struct extent_buffer *parent, int parent_slot, |
Chris Mason | 9fa8cfe | 2009-03-13 10:24:59 -0400 | [diff] [blame] | 2686 | struct extent_buffer **cow_ret); |
Chris Mason | be20aa9 | 2007-12-17 20:14:01 -0500 | [diff] [blame] | 2687 | int btrfs_copy_root(struct btrfs_trans_handle *trans, |
| 2688 | struct btrfs_root *root, |
| 2689 | struct extent_buffer *buf, |
| 2690 | struct extent_buffer **cow_ret, u64 new_root_objectid); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2691 | int btrfs_block_can_be_shared(struct btrfs_root *root, |
| 2692 | struct extent_buffer *buf); |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 2693 | void btrfs_extend_item(struct btrfs_trans_handle *trans, |
| 2694 | struct btrfs_root *root, struct btrfs_path *path, |
| 2695 | u32 data_size); |
| 2696 | void btrfs_truncate_item(struct btrfs_trans_handle *trans, |
| 2697 | struct btrfs_root *root, |
| 2698 | struct btrfs_path *path, |
| 2699 | u32 new_size, int from_end); |
Chris Mason | 459931e | 2008-12-10 09:10:46 -0500 | [diff] [blame] | 2700 | int btrfs_split_item(struct btrfs_trans_handle *trans, |
| 2701 | struct btrfs_root *root, |
| 2702 | struct btrfs_path *path, |
| 2703 | struct btrfs_key *new_key, |
| 2704 | unsigned long split_offset); |
Yan, Zheng | ad48fd75 | 2009-11-12 09:33:58 +0000 | [diff] [blame] | 2705 | int btrfs_duplicate_item(struct btrfs_trans_handle *trans, |
| 2706 | struct btrfs_root *root, |
| 2707 | struct btrfs_path *path, |
| 2708 | struct btrfs_key *new_key); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 2709 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
| 2710 | *root, struct btrfs_key *key, struct btrfs_path *p, int |
| 2711 | ins_len, int cow); |
Jan Schmidt | 5d9e75c4 | 2012-05-16 18:25:47 +0200 | [diff] [blame] | 2712 | int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key, |
| 2713 | struct btrfs_path *p, u64 time_seq); |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 2714 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2715 | struct btrfs_root *root, struct extent_buffer *parent, |
Chris Mason | a6b6e75 | 2007-10-15 16:22:39 -0400 | [diff] [blame] | 2716 | int start_slot, int cache_only, u64 *last_ret, |
| 2717 | struct btrfs_key *progress); |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 2718 | void btrfs_release_path(struct btrfs_path *p); |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 2719 | struct btrfs_path *btrfs_alloc_path(void); |
| 2720 | void btrfs_free_path(struct btrfs_path *p); |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 2721 | void btrfs_set_path_blocking(struct btrfs_path *p); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2722 | void btrfs_clear_path_blocking(struct btrfs_path *p, |
Chris Mason | bd68151 | 2011-07-16 15:23:14 -0400 | [diff] [blame] | 2723 | struct extent_buffer *held, int held_rw); |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 2724 | void btrfs_unlock_up_safe(struct btrfs_path *p, int level); |
| 2725 | |
Chris Mason | 85e21ba | 2008-01-29 15:11:36 -0500 | [diff] [blame] | 2726 | int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 2727 | struct btrfs_path *path, int slot, int nr); |
Chris Mason | 85e21ba | 2008-01-29 15:11:36 -0500 | [diff] [blame] | 2728 | static inline int btrfs_del_item(struct btrfs_trans_handle *trans, |
| 2729 | struct btrfs_root *root, |
| 2730 | struct btrfs_path *path) |
| 2731 | { |
| 2732 | return btrfs_del_items(trans, root, path, path->slots[0], 1); |
| 2733 | } |
| 2734 | |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 2735 | void setup_items_for_insert(struct btrfs_trans_handle *trans, |
| 2736 | struct btrfs_root *root, struct btrfs_path *path, |
| 2737 | struct btrfs_key *cpu_key, u32 *data_size, |
| 2738 | u32 total_data, u32 total_size, int nr); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 2739 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| 2740 | *root, struct btrfs_key *key, void *data, u32 data_size); |
Chris Mason | 9c58309 | 2008-01-29 15:15:18 -0500 | [diff] [blame] | 2741 | int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, |
| 2742 | struct btrfs_root *root, |
| 2743 | struct btrfs_path *path, |
| 2744 | struct btrfs_key *cpu_key, u32 *data_size, int nr); |
| 2745 | |
| 2746 | static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, |
| 2747 | struct btrfs_root *root, |
| 2748 | struct btrfs_path *path, |
| 2749 | struct btrfs_key *key, |
| 2750 | u32 data_size) |
| 2751 | { |
| 2752 | return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); |
| 2753 | } |
| 2754 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 2755 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
Jan Schmidt | c7d22a3 | 2011-11-22 15:14:33 +0100 | [diff] [blame] | 2756 | static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) |
| 2757 | { |
| 2758 | ++p->slots[0]; |
| 2759 | if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) |
| 2760 | return btrfs_next_leaf(root, p); |
| 2761 | return 0; |
| 2762 | } |
Chris Mason | 7bb8631 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 2763 | int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2764 | int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); |
Jeff Mahoney | 2c53679 | 2011-10-03 23:22:41 -0400 | [diff] [blame] | 2765 | int __must_check btrfs_drop_snapshot(struct btrfs_root *root, |
| 2766 | struct btrfs_block_rsv *block_rsv, |
| 2767 | int update_ref, int for_reloc); |
Yan Zheng | f82d02d | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2768 | int btrfs_drop_subtree(struct btrfs_trans_handle *trans, |
| 2769 | struct btrfs_root *root, |
| 2770 | struct extent_buffer *node, |
| 2771 | struct extent_buffer *parent); |
David Sterba | 7841cb2 | 2011-05-31 18:07:27 +0200 | [diff] [blame] | 2772 | static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) |
| 2773 | { |
| 2774 | /* |
| 2775 | * Get synced with close_ctree() |
| 2776 | */ |
| 2777 | smp_mb(); |
| 2778 | return fs_info->closing; |
| 2779 | } |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 2780 | static inline void free_fs_info(struct btrfs_fs_info *fs_info) |
| 2781 | { |
Ilya Dryomov | 837d5b6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 2782 | kfree(fs_info->balance_ctl); |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 2783 | kfree(fs_info->delayed_root); |
| 2784 | kfree(fs_info->extent_root); |
| 2785 | kfree(fs_info->tree_root); |
| 2786 | kfree(fs_info->chunk_root); |
| 2787 | kfree(fs_info->dev_root); |
| 2788 | kfree(fs_info->csum_root); |
| 2789 | kfree(fs_info->super_copy); |
| 2790 | kfree(fs_info->super_for_commit); |
| 2791 | kfree(fs_info); |
| 2792 | } |
David Sterba | 7841cb2 | 2011-05-31 18:07:27 +0200 | [diff] [blame] | 2793 | |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 2794 | /* root-item.c */ |
Chris Mason | ea9e8b1 | 2008-11-17 21:14:24 -0500 | [diff] [blame] | 2795 | int btrfs_find_root_ref(struct btrfs_root *tree_root, |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2796 | struct btrfs_path *path, |
| 2797 | u64 root_id, u64 ref_id); |
Chris Mason | 0660b5a | 2008-11-17 20:37:39 -0500 | [diff] [blame] | 2798 | int btrfs_add_root_ref(struct btrfs_trans_handle *trans, |
| 2799 | struct btrfs_root *tree_root, |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2800 | u64 root_id, u64 ref_id, u64 dirid, u64 sequence, |
| 2801 | const char *name, int name_len); |
| 2802 | int btrfs_del_root_ref(struct btrfs_trans_handle *trans, |
| 2803 | struct btrfs_root *tree_root, |
| 2804 | u64 root_id, u64 ref_id, u64 dirid, u64 *sequence, |
Chris Mason | 0660b5a | 2008-11-17 20:37:39 -0500 | [diff] [blame] | 2805 | const char *name, int name_len); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 2806 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 2807 | struct btrfs_key *key); |
| 2808 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root |
| 2809 | *root, struct btrfs_key *key, struct btrfs_root_item |
| 2810 | *item); |
Jeff Mahoney | b45a9d8 | 2011-10-03 23:22:44 -0400 | [diff] [blame] | 2811 | int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, |
| 2812 | struct btrfs_root *root, |
| 2813 | struct btrfs_key *key, |
| 2814 | struct btrfs_root_item *item); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 2815 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct |
| 2816 | btrfs_root_item *item, struct btrfs_key *key); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2817 | int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2818 | int btrfs_find_orphan_roots(struct btrfs_root *tree_root); |
Mark Fasheh | bf5f32e | 2011-07-14 21:23:06 +0000 | [diff] [blame] | 2819 | void btrfs_set_root_node(struct btrfs_root_item *item, |
| 2820 | struct extent_buffer *node); |
Li Zefan | 08fe4db | 2011-03-28 02:01:25 +0000 | [diff] [blame] | 2821 | void btrfs_check_and_init_root_item(struct btrfs_root_item *item); |
| 2822 | |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 2823 | /* dir-item.c */ |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2824 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, |
| 2825 | struct btrfs_root *root, const char *name, |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2826 | int name_len, struct inode *dir, |
Josef Bacik | aec7477 | 2008-07-24 12:12:38 -0400 | [diff] [blame] | 2827 | struct btrfs_key *location, u8 type, u64 index); |
Chris Mason | 7e38180 | 2007-04-19 15:36:27 -0400 | [diff] [blame] | 2828 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
| 2829 | struct btrfs_root *root, |
| 2830 | struct btrfs_path *path, u64 dir, |
| 2831 | const char *name, int name_len, |
| 2832 | int mod); |
| 2833 | struct btrfs_dir_item * |
| 2834 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, |
| 2835 | struct btrfs_root *root, |
| 2836 | struct btrfs_path *path, u64 dir, |
| 2837 | u64 objectid, const char *name, int name_len, |
| 2838 | int mod); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2839 | struct btrfs_dir_item * |
| 2840 | btrfs_search_dir_index_item(struct btrfs_root *root, |
| 2841 | struct btrfs_path *path, u64 dirid, |
| 2842 | const char *name, int name_len); |
Chris Mason | 7e38180 | 2007-04-19 15:36:27 -0400 | [diff] [blame] | 2843 | struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, |
| 2844 | struct btrfs_path *path, |
Chris Mason | 7f5c151 | 2007-03-23 15:56:19 -0400 | [diff] [blame] | 2845 | const char *name, int name_len); |
Chris Mason | 7e38180 | 2007-04-19 15:36:27 -0400 | [diff] [blame] | 2846 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
| 2847 | struct btrfs_root *root, |
| 2848 | struct btrfs_path *path, |
| 2849 | struct btrfs_dir_item *di); |
Josef Bacik | 5103e94 | 2007-11-16 11:45:54 -0500 | [diff] [blame] | 2850 | int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, |
Yan, Zheng | f34f57a | 2009-11-12 09:35:27 +0000 | [diff] [blame] | 2851 | struct btrfs_root *root, |
| 2852 | struct btrfs_path *path, u64 objectid, |
| 2853 | const char *name, u16 name_len, |
| 2854 | const void *data, u16 data_len); |
Josef Bacik | 5103e94 | 2007-11-16 11:45:54 -0500 | [diff] [blame] | 2855 | struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, |
| 2856 | struct btrfs_root *root, |
| 2857 | struct btrfs_path *path, u64 dir, |
| 2858 | const char *name, u16 name_len, |
| 2859 | int mod); |
Josef Bacik | 22a94d4 | 2011-03-16 16:47:17 -0400 | [diff] [blame] | 2860 | int verify_dir_item(struct btrfs_root *root, |
| 2861 | struct extent_buffer *leaf, |
| 2862 | struct btrfs_dir_item *dir_item); |
Josef Bacik | 7b12876 | 2008-07-24 12:17:14 -0400 | [diff] [blame] | 2863 | |
| 2864 | /* orphan.c */ |
| 2865 | int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, |
| 2866 | struct btrfs_root *root, u64 offset); |
| 2867 | int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, |
| 2868 | struct btrfs_root *root, u64 offset); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2869 | int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); |
Josef Bacik | 7b12876 | 2008-07-24 12:17:14 -0400 | [diff] [blame] | 2870 | |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 2871 | /* inode-item.c */ |
Chris Mason | 3954401 | 2007-12-12 14:38:19 -0500 | [diff] [blame] | 2872 | int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, |
| 2873 | struct btrfs_root *root, |
| 2874 | const char *name, int name_len, |
Josef Bacik | aec7477 | 2008-07-24 12:12:38 -0400 | [diff] [blame] | 2875 | u64 inode_objectid, u64 ref_objectid, u64 index); |
Chris Mason | 3954401 | 2007-12-12 14:38:19 -0500 | [diff] [blame] | 2876 | int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, |
| 2877 | struct btrfs_root *root, |
| 2878 | const char *name, int name_len, |
Josef Bacik | aec7477 | 2008-07-24 12:12:38 -0400 | [diff] [blame] | 2879 | u64 inode_objectid, u64 ref_objectid, u64 *index); |
Yan, Zheng | a22285a | 2010-05-16 10:48:46 -0400 | [diff] [blame] | 2880 | struct btrfs_inode_ref * |
| 2881 | btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans, |
| 2882 | struct btrfs_root *root, |
| 2883 | struct btrfs_path *path, |
| 2884 | const char *name, int name_len, |
| 2885 | u64 inode_objectid, u64 ref_objectid, int mod); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2886 | int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, |
| 2887 | struct btrfs_root *root, |
| 2888 | struct btrfs_path *path, u64 objectid); |
Chris Mason | 293ffd5 | 2007-03-20 15:57:25 -0400 | [diff] [blame] | 2889 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 2890 | *root, struct btrfs_path *path, |
| 2891 | struct btrfs_key *location, int mod); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 2892 | |
| 2893 | /* file-item.c */ |
Chris Mason | 459931e | 2008-12-10 09:10:46 -0500 | [diff] [blame] | 2894 | int btrfs_del_csums(struct btrfs_trans_handle *trans, |
| 2895 | struct btrfs_root *root, u64 bytenr, u64 len); |
Chris Mason | 61b4944 | 2008-07-31 15:42:53 -0400 | [diff] [blame] | 2896 | int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode, |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2897 | struct bio *bio, u32 *dst); |
Josef Bacik | 4b46fce | 2010-05-23 11:00:55 -0400 | [diff] [blame] | 2898 | int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode, |
| 2899 | struct bio *bio, u64 logical_offset, u32 *dst); |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 2900 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 2901 | struct btrfs_root *root, |
| 2902 | u64 objectid, u64 pos, |
| 2903 | u64 disk_offset, u64 disk_num_bytes, |
| 2904 | u64 num_bytes, u64 offset, u64 ram_bytes, |
| 2905 | u8 compression, u8 encryption, u16 other_encoding); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 2906 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
| 2907 | struct btrfs_root *root, |
| 2908 | struct btrfs_path *path, u64 objectid, |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2909 | u64 bytenr, int mod); |
Chris Mason | 065631f | 2008-02-20 12:07:25 -0500 | [diff] [blame] | 2910 | int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2911 | struct btrfs_root *root, |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 2912 | struct btrfs_ordered_sum *sums); |
Chris Mason | 3edf7d3 | 2008-07-18 06:17:13 -0400 | [diff] [blame] | 2913 | int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode, |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2914 | struct bio *bio, u64 file_start, int contig); |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 2915 | struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, |
| 2916 | struct btrfs_root *root, |
| 2917 | struct btrfs_path *path, |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2918 | u64 bytenr, int cow); |
Chris Mason | 1de037a | 2007-05-29 15:17:08 -0400 | [diff] [blame] | 2919 | int btrfs_csum_truncate(struct btrfs_trans_handle *trans, |
| 2920 | struct btrfs_root *root, struct btrfs_path *path, |
| 2921 | u64 isize); |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 2922 | int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, |
| 2923 | struct list_head *list, int search_commit); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2924 | /* inode.c */ |
Josef Bacik | b267515 | 2011-07-18 13:21:36 -0400 | [diff] [blame] | 2925 | struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page, |
| 2926 | size_t pg_offset, u64 start, u64 len, |
| 2927 | int create); |
Chris Mason | 4881ee5 | 2008-07-24 09:51:08 -0400 | [diff] [blame] | 2928 | |
| 2929 | /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */ |
Eric Sandeen | 5036f53 | 2008-08-07 11:19:42 -0400 | [diff] [blame] | 2930 | #if defined(ClearPageFsMisc) && !defined(ClearPageChecked) |
Chris Mason | 4881ee5 | 2008-07-24 09:51:08 -0400 | [diff] [blame] | 2931 | #define ClearPageChecked ClearPageFsMisc |
| 2932 | #define SetPageChecked SetPageFsMisc |
| 2933 | #define PageChecked PageFsMisc |
| 2934 | #endif |
| 2935 | |
Li Zefan | b6973aa | 2011-07-20 03:46:35 +0000 | [diff] [blame] | 2936 | /* This forces readahead on a given range of bytes in an inode */ |
| 2937 | static inline void btrfs_force_ra(struct address_space *mapping, |
| 2938 | struct file_ra_state *ra, struct file *file, |
| 2939 | pgoff_t offset, unsigned long req_size) |
| 2940 | { |
| 2941 | page_cache_sync_readahead(mapping, ra, file, offset, req_size); |
| 2942 | } |
| 2943 | |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 2944 | struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); |
| 2945 | int btrfs_set_inode_index(struct inode *dir, u64 *index); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2946 | int btrfs_unlink_inode(struct btrfs_trans_handle *trans, |
| 2947 | struct btrfs_root *root, |
| 2948 | struct inode *dir, struct inode *inode, |
| 2949 | const char *name, int name_len); |
| 2950 | int btrfs_add_link(struct btrfs_trans_handle *trans, |
| 2951 | struct inode *parent_inode, struct inode *inode, |
| 2952 | const char *name, int name_len, int add_backref, u64 index); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2953 | int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, |
| 2954 | struct btrfs_root *root, |
| 2955 | struct inode *dir, u64 objectid, |
| 2956 | const char *name, int name_len); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2957 | int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, |
| 2958 | struct btrfs_root *root, |
| 2959 | struct inode *inode, u64 new_size, |
| 2960 | u32 min_type); |
| 2961 | |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 2962 | int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput); |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 2963 | int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, |
| 2964 | struct extent_state **cached_state); |
Chris Mason | f421950 | 2008-07-22 11:18:09 -0400 | [diff] [blame] | 2965 | int btrfs_writepages(struct address_space *mapping, |
| 2966 | struct writeback_control *wbc); |
Yan Zheng | d2fb343 | 2008-12-11 16:30:39 -0500 | [diff] [blame] | 2967 | int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, |
Josef Bacik | d82a6f1 | 2011-05-11 15:26:06 -0400 | [diff] [blame] | 2968 | struct btrfs_root *new_root, u64 new_dirid); |
Chris Mason | 239b14b | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 2969 | int btrfs_merge_bio_hook(struct page *page, unsigned long offset, |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 2970 | size_t size, struct bio *bio, unsigned long bio_flags); |
Chris Mason | 239b14b | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 2971 | |
Nick Piggin | c2ec175 | 2009-03-31 15:23:21 -0700 | [diff] [blame] | 2972 | int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf); |
Chris Mason | 9ebefb18 | 2007-06-15 13:50:00 -0400 | [diff] [blame] | 2973 | int btrfs_readpage(struct file *file, struct page *page); |
Al Viro | bd55597 | 2010-06-07 11:35:40 -0400 | [diff] [blame] | 2974 | void btrfs_evict_inode(struct inode *inode); |
Christoph Hellwig | a9185b4 | 2010-03-05 09:21:37 +0100 | [diff] [blame] | 2975 | int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); |
Josef Bacik | 22c44fe | 2011-11-30 10:45:38 -0500 | [diff] [blame] | 2976 | int btrfs_dirty_inode(struct inode *inode); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2977 | struct inode *btrfs_alloc_inode(struct super_block *sb); |
| 2978 | void btrfs_destroy_inode(struct inode *inode); |
Al Viro | 45321ac | 2010-06-07 13:43:19 -0400 | [diff] [blame] | 2979 | int btrfs_drop_inode(struct inode *inode); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2980 | int btrfs_init_cachep(void); |
| 2981 | void btrfs_destroy_cachep(void); |
Sage Weil | 6bf13c0 | 2008-06-10 10:07:39 -0400 | [diff] [blame] | 2982 | long btrfs_ioctl_trans_end(struct file *file); |
Balaji Rao | 1a54ef8 | 2008-07-21 02:01:04 +0530 | [diff] [blame] | 2983 | struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, |
Josef Bacik | 73f7341 | 2009-12-04 17:38:27 +0000 | [diff] [blame] | 2984 | struct btrfs_root *root, int *was_new); |
Chris Mason | a52d9a8 | 2007-08-27 16:49:44 -0400 | [diff] [blame] | 2985 | struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, |
David Sterba | 306e16c | 2011-04-19 14:29:38 +0200 | [diff] [blame] | 2986 | size_t pg_offset, u64 start, u64 end, |
Chris Mason | a52d9a8 | 2007-08-27 16:49:44 -0400 | [diff] [blame] | 2987 | int create); |
| 2988 | int btrfs_update_inode(struct btrfs_trans_handle *trans, |
| 2989 | struct btrfs_root *root, |
| 2990 | struct inode *inode); |
Zheng Yan | 5b21f2e | 2008-09-26 10:05:38 -0400 | [diff] [blame] | 2991 | int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode); |
| 2992 | int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode); |
Josef Bacik | 66b4ffd | 2011-01-31 16:22:42 -0500 | [diff] [blame] | 2993 | int btrfs_orphan_cleanup(struct btrfs_root *root); |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 2994 | void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans, |
| 2995 | struct btrfs_root *root); |
Josef Bacik | a41ad39 | 2011-01-31 15:30:16 -0500 | [diff] [blame] | 2996 | int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 2997 | void btrfs_invalidate_inodes(struct btrfs_root *root); |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 2998 | void btrfs_add_delayed_iput(struct inode *inode); |
| 2999 | void btrfs_run_delayed_iputs(struct btrfs_root *root); |
Yan, Zheng | efa5646 | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3000 | int btrfs_prealloc_file_range(struct inode *inode, int mode, |
| 3001 | u64 start, u64 num_bytes, u64 min_size, |
| 3002 | loff_t actual_len, u64 *alloc_hint); |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 3003 | int btrfs_prealloc_file_range_trans(struct inode *inode, |
| 3004 | struct btrfs_trans_handle *trans, int mode, |
| 3005 | u64 start, u64 num_bytes, u64 min_size, |
| 3006 | loff_t actual_len, u64 *alloc_hint); |
Alexey Dobriyan | 82d339d | 2009-10-09 09:54:36 -0400 | [diff] [blame] | 3007 | extern const struct dentry_operations btrfs_dentry_operations; |
Christoph Hellwig | f46b5a6 | 2008-06-11 21:53:53 -0400 | [diff] [blame] | 3008 | |
| 3009 | /* ioctl.c */ |
| 3010 | long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
Christoph Hellwig | 6cbff00 | 2009-04-17 10:37:41 +0200 | [diff] [blame] | 3011 | void btrfs_update_iflags(struct inode *inode); |
| 3012 | void btrfs_inherit_iflags(struct inode *inode, struct inode *dir); |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 3013 | int btrfs_defrag_file(struct inode *inode, struct file *file, |
| 3014 | struct btrfs_ioctl_defrag_range_args *range, |
| 3015 | u64 newer_than, unsigned long max_pages); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 3016 | /* file.c */ |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 3017 | int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, |
| 3018 | struct inode *inode); |
| 3019 | int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); |
Josef Bacik | 02c24a8 | 2011-07-16 20:44:56 -0400 | [diff] [blame] | 3020 | int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); |
Zheng Yan | 5b21f2e | 2008-09-26 10:05:38 -0400 | [diff] [blame] | 3021 | int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, |
| 3022 | int skip_pinned); |
Alexey Dobriyan | 828c095 | 2009-10-01 15:43:56 -0700 | [diff] [blame] | 3023 | extern const struct file_operations btrfs_file_operations; |
Yan, Zheng | 920bbbf | 2009-11-12 09:34:08 +0000 | [diff] [blame] | 3024 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode, |
| 3025 | u64 start, u64 end, u64 *hint_byte, int drop_cache); |
Yan Zheng | d899e05 | 2008-10-30 14:25:28 -0400 | [diff] [blame] | 3026 | int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, |
Yan Zheng | d899e05 | 2008-10-30 14:25:28 -0400 | [diff] [blame] | 3027 | struct inode *inode, u64 start, u64 end); |
Sage Weil | 6bf13c0 | 2008-06-10 10:07:39 -0400 | [diff] [blame] | 3028 | int btrfs_release_file(struct inode *inode, struct file *file); |
Josef Bacik | be1a12a | 2011-04-06 13:05:22 -0400 | [diff] [blame] | 3029 | void btrfs_drop_pages(struct page **pages, size_t num_pages); |
| 3030 | int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode, |
| 3031 | struct page **pages, size_t num_pages, |
| 3032 | loff_t pos, size_t write_bytes, |
| 3033 | struct extent_state **cached); |
Sage Weil | 6bf13c0 | 2008-06-10 10:07:39 -0400 | [diff] [blame] | 3034 | |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 3035 | /* tree-defrag.c */ |
| 3036 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, |
| 3037 | struct btrfs_root *root, int cache_only); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 3038 | |
| 3039 | /* sysfs.c */ |
| 3040 | int btrfs_init_sysfs(void); |
| 3041 | void btrfs_exit_sysfs(void); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 3042 | |
Josef Bacik | 5103e94 | 2007-11-16 11:45:54 -0500 | [diff] [blame] | 3043 | /* xattr.c */ |
| 3044 | ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); |
Josef Bacik | 6099afe | 2008-07-24 12:16:03 -0400 | [diff] [blame] | 3045 | |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 3046 | /* super.c */ |
Christoph Hellwig | edf24ab | 2008-06-10 10:40:29 -0400 | [diff] [blame] | 3047 | int btrfs_parse_options(struct btrfs_root *root, char *options); |
Sage Weil | 6bf13c0 | 2008-06-10 10:07:39 -0400 | [diff] [blame] | 3048 | int btrfs_sync_fs(struct super_block *sb, int wait); |
Jeff Mahoney | 4da3511 | 2012-03-01 14:57:30 +0100 | [diff] [blame] | 3049 | void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3050 | void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function, |
Jeff Mahoney | 4da3511 | 2012-03-01 14:57:30 +0100 | [diff] [blame] | 3051 | unsigned int line, int errno, const char *fmt, ...); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3052 | |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 3053 | void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, |
| 3054 | struct btrfs_root *root, const char *function, |
| 3055 | unsigned int line, int errno); |
| 3056 | |
| 3057 | #define btrfs_abort_transaction(trans, root, errno) \ |
| 3058 | do { \ |
| 3059 | __btrfs_abort_transaction(trans, root, __func__, \ |
| 3060 | __LINE__, errno); \ |
| 3061 | } while (0) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3062 | |
| 3063 | #define btrfs_std_error(fs_info, errno) \ |
| 3064 | do { \ |
| 3065 | if ((errno)) \ |
Jeff Mahoney | 4da3511 | 2012-03-01 14:57:30 +0100 | [diff] [blame] | 3066 | __btrfs_std_error((fs_info), __func__, \ |
| 3067 | __LINE__, (errno), NULL); \ |
| 3068 | } while (0) |
| 3069 | |
| 3070 | #define btrfs_error(fs_info, errno, fmt, args...) \ |
| 3071 | do { \ |
| 3072 | __btrfs_std_error((fs_info), __func__, __LINE__, \ |
| 3073 | (errno), fmt, ##args); \ |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 3074 | } while (0) |
Josef Bacik | 33268ea | 2008-07-24 12:16:36 -0400 | [diff] [blame] | 3075 | |
Jeff Mahoney | 8c34293 | 2011-10-03 23:22:31 -0400 | [diff] [blame] | 3076 | void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, |
| 3077 | unsigned int line, int errno, const char *fmt, ...); |
| 3078 | |
| 3079 | #define btrfs_panic(fs_info, errno, fmt, args...) \ |
| 3080 | do { \ |
| 3081 | struct btrfs_fs_info *_i = (fs_info); \ |
| 3082 | __btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args); \ |
| 3083 | BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)); \ |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 3084 | } while (0) |
| 3085 | |
| 3086 | /* acl.c */ |
| 3087 | #ifdef CONFIG_BTRFS_FS_POSIX_ACL |
Christoph Hellwig | 4e34e71 | 2011-07-23 17:37:31 +0200 | [diff] [blame] | 3088 | struct posix_acl *btrfs_get_acl(struct inode *inode, int type); |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 3089 | int btrfs_init_acl(struct btrfs_trans_handle *trans, |
| 3090 | struct inode *inode, struct inode *dir); |
| 3091 | int btrfs_acl_chmod(struct inode *inode); |
Li Zefan | 9b89d95 | 2011-07-14 03:17:39 +0000 | [diff] [blame] | 3092 | #else |
Linus Torvalds | ed8f373 | 2011-08-02 21:14:05 -1000 | [diff] [blame] | 3093 | #define btrfs_get_acl NULL |
Li Zefan | 9b89d95 | 2011-07-14 03:17:39 +0000 | [diff] [blame] | 3094 | static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, |
| 3095 | struct inode *inode, struct inode *dir) |
| 3096 | { |
| 3097 | return 0; |
| 3098 | } |
| 3099 | static inline int btrfs_acl_chmod(struct inode *inode) |
| 3100 | { |
| 3101 | return 0; |
| 3102 | } |
| 3103 | #endif |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 3104 | |
| 3105 | /* relocation.c */ |
| 3106 | int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start); |
| 3107 | int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, |
| 3108 | struct btrfs_root *root); |
| 3109 | int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, |
| 3110 | struct btrfs_root *root); |
| 3111 | int btrfs_recover_relocation(struct btrfs_root *root); |
| 3112 | int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); |
| 3113 | void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, |
| 3114 | struct btrfs_root *root, struct extent_buffer *buf, |
| 3115 | struct extent_buffer *cow); |
| 3116 | void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans, |
| 3117 | struct btrfs_pending_snapshot *pending, |
| 3118 | u64 *bytes_to_reserve); |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 3119 | int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 3120 | struct btrfs_pending_snapshot *pending); |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 3121 | |
| 3122 | /* scrub.c */ |
| 3123 | int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end, |
Arne Jansen | 8628764 | 2011-03-23 16:34:19 +0100 | [diff] [blame] | 3124 | struct btrfs_scrub_progress *progress, int readonly); |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 3125 | void btrfs_scrub_pause(struct btrfs_root *root); |
| 3126 | void btrfs_scrub_pause_super(struct btrfs_root *root); |
| 3127 | void btrfs_scrub_continue(struct btrfs_root *root); |
| 3128 | void btrfs_scrub_continue_super(struct btrfs_root *root); |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 3129 | int __btrfs_scrub_cancel(struct btrfs_fs_info *info); |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 3130 | int btrfs_scrub_cancel(struct btrfs_root *root); |
| 3131 | int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev); |
| 3132 | int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid); |
| 3133 | int btrfs_scrub_progress(struct btrfs_root *root, u64 devid, |
| 3134 | struct btrfs_scrub_progress *progress); |
| 3135 | |
Arne Jansen | 7414a03 | 2011-05-23 14:33:49 +0200 | [diff] [blame] | 3136 | /* reada.c */ |
| 3137 | struct reada_control { |
| 3138 | struct btrfs_root *root; /* tree to prefetch */ |
| 3139 | struct btrfs_key key_start; |
| 3140 | struct btrfs_key key_end; /* exclusive */ |
| 3141 | atomic_t elems; |
| 3142 | struct kref refcnt; |
| 3143 | wait_queue_head_t wait; |
| 3144 | }; |
| 3145 | struct reada_control *btrfs_reada_add(struct btrfs_root *root, |
| 3146 | struct btrfs_key *start, struct btrfs_key *end); |
| 3147 | int btrfs_reada_wait(void *handle); |
| 3148 | void btrfs_reada_detach(void *handle); |
| 3149 | int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb, |
| 3150 | u64 start, int err); |
| 3151 | |
Jan Schmidt | 64947ec | 2012-05-16 16:57:09 +0200 | [diff] [blame] | 3152 | /* delayed seq elem */ |
| 3153 | struct seq_list { |
| 3154 | struct list_head list; |
| 3155 | u64 seq; |
| 3156 | u32 flags; |
| 3157 | }; |
| 3158 | |
Jan Schmidt | bd989ba | 2012-05-16 17:18:50 +0200 | [diff] [blame] | 3159 | void btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, |
| 3160 | struct seq_list *elem); |
| 3161 | void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, |
| 3162 | struct seq_list *elem); |
| 3163 | |
Jan Schmidt | 95a0607 | 2012-05-29 17:06:54 +0200 | [diff] [blame] | 3164 | static inline int is_fstree(u64 rootid) |
| 3165 | { |
| 3166 | if (rootid == BTRFS_FS_TREE_OBJECTID || |
| 3167 | (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID) |
| 3168 | return 1; |
| 3169 | return 0; |
| 3170 | } |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 3171 | #endif |