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 | |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 51 | #define BTRFS_MAX_LEVEL 8 |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 52 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 53 | #define BTRFS_COMPAT_EXTENT_TREE_V0 |
| 54 | |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 55 | /* |
| 56 | * files bigger than this get some pre-flushing when they are added |
| 57 | * to the ordered operations list. That way we limit the total |
| 58 | * work done by the commit |
| 59 | */ |
| 60 | #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024) |
| 61 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 62 | /* holds pointers to all of the tree roots */ |
Chris Mason | 6407bf6 | 2007-03-27 06:33:00 -0400 | [diff] [blame] | 63 | #define BTRFS_ROOT_TREE_OBJECTID 1ULL |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 64 | |
| 65 | /* stores information about which extents are in use, and reference counts */ |
Chris Mason | 0cf6c62 | 2007-06-09 09:22:25 -0400 | [diff] [blame] | 66 | #define BTRFS_EXTENT_TREE_OBJECTID 2ULL |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 67 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 68 | /* |
| 69 | * chunk tree stores translations from logical -> physical block numbering |
| 70 | * the super block points to the chunk tree |
| 71 | */ |
Chris Mason | e085def | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 72 | #define BTRFS_CHUNK_TREE_OBJECTID 3ULL |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 73 | |
| 74 | /* |
| 75 | * stores information about which areas of a given device are in use. |
| 76 | * one per device. The tree of tree roots points to the device tree |
| 77 | */ |
Chris Mason | e085def | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 78 | #define BTRFS_DEV_TREE_OBJECTID 4ULL |
| 79 | |
| 80 | /* one per subvolume, storing files and directories */ |
| 81 | #define BTRFS_FS_TREE_OBJECTID 5ULL |
| 82 | |
| 83 | /* directory objectid inside the root tree */ |
| 84 | #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 85 | |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 86 | /* holds checksums of all the data extents */ |
| 87 | #define BTRFS_CSUM_TREE_OBJECTID 7ULL |
| 88 | |
Josef Bacik | 7b12876 | 2008-07-24 12:17:14 -0400 | [diff] [blame] | 89 | /* orhpan objectid for tracking unlinked/truncated files */ |
| 90 | #define BTRFS_ORPHAN_OBJECTID -5ULL |
| 91 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 92 | /* does write ahead logging to speed up fsyncs */ |
| 93 | #define BTRFS_TREE_LOG_OBJECTID -6ULL |
| 94 | #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL |
| 95 | |
Zheng Yan | e465768 | 2008-09-26 10:04:53 -0400 | [diff] [blame] | 96 | /* for space balancing */ |
| 97 | #define BTRFS_TREE_RELOC_OBJECTID -8ULL |
| 98 | #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL |
| 99 | |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 100 | /* |
| 101 | * extent checksums all have this objectid |
| 102 | * this allows them to share the logging tree |
| 103 | * for fsyncs |
| 104 | */ |
| 105 | #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL |
| 106 | |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 107 | /* For storing free space cache */ |
| 108 | #define BTRFS_FREE_SPACE_OBJECTID -11ULL |
| 109 | |
Li Zefan | 82d5902 | 2011-04-20 10:33:24 +0800 | [diff] [blame] | 110 | /* |
| 111 | * The inode number assigned to the special inode for sotring |
| 112 | * free ino cache |
| 113 | */ |
| 114 | #define BTRFS_FREE_INO_OBJECTID -12ULL |
| 115 | |
Zheng Yan | 31840ae | 2008-09-23 13:14:14 -0400 | [diff] [blame] | 116 | /* dummy objectid represents multiple objectids */ |
| 117 | #define BTRFS_MULTIPLE_OBJECTIDS -255ULL |
| 118 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 119 | /* |
Zheng Yan | 6527cdb | 2008-09-05 16:43:53 -0400 | [diff] [blame] | 120 | * All files have objectids in this range. |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 121 | */ |
Chris Mason | f6dbff5 | 2007-12-13 11:13:32 -0500 | [diff] [blame] | 122 | #define BTRFS_FIRST_FREE_OBJECTID 256ULL |
Zheng Yan | 6527cdb | 2008-09-05 16:43:53 -0400 | [diff] [blame] | 123 | #define BTRFS_LAST_FREE_OBJECTID -256ULL |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 124 | #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 125 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 126 | |
| 127 | /* |
| 128 | * the device items go into the chunk tree. The key is in the form |
| 129 | * [ 1 BTRFS_DEV_ITEM_KEY device_id ] |
| 130 | */ |
| 131 | #define BTRFS_DEV_ITEMS_OBJECTID 1ULL |
| 132 | |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 133 | #define BTRFS_BTREE_INODE_OBJECTID 1 |
| 134 | |
| 135 | #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2 |
| 136 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 137 | /* |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 138 | * we can actually store much bigger names, but lets not confuse the rest |
| 139 | * of linux |
| 140 | */ |
| 141 | #define BTRFS_NAME_LEN 255 |
| 142 | |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 143 | /* 32 bytes in various csum fields */ |
| 144 | #define BTRFS_CSUM_SIZE 32 |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 145 | |
| 146 | /* csum types */ |
| 147 | #define BTRFS_CSUM_TYPE_CRC32 0 |
| 148 | |
| 149 | static int btrfs_csum_sizes[] = { 4, 0 }; |
| 150 | |
Chris Mason | 509659c | 2007-05-10 12:36:17 -0400 | [diff] [blame] | 151 | /* four bytes for CRC32 */ |
Chris Mason | 3954401 | 2007-12-12 14:38:19 -0500 | [diff] [blame] | 152 | #define BTRFS_EMPTY_DIR_SIZE 0 |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 153 | |
Chris Mason | fabb568 | 2007-06-07 22:13:21 -0400 | [diff] [blame] | 154 | #define BTRFS_FT_UNKNOWN 0 |
| 155 | #define BTRFS_FT_REG_FILE 1 |
| 156 | #define BTRFS_FT_DIR 2 |
| 157 | #define BTRFS_FT_CHRDEV 3 |
| 158 | #define BTRFS_FT_BLKDEV 4 |
| 159 | #define BTRFS_FT_FIFO 5 |
| 160 | #define BTRFS_FT_SOCK 6 |
| 161 | #define BTRFS_FT_SYMLINK 7 |
Josef Bacik | 5103e94 | 2007-11-16 11:45:54 -0500 | [diff] [blame] | 162 | #define BTRFS_FT_XATTR 8 |
| 163 | #define BTRFS_FT_MAX 9 |
Chris Mason | fabb568 | 2007-06-07 22:13:21 -0400 | [diff] [blame] | 164 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 165 | /* |
Wu Fengguang | d4a7894 | 2009-04-02 16:46:06 -0400 | [diff] [blame] | 166 | * The key defines the order in the tree, and so it also defines (optimal) |
| 167 | * block layout. |
| 168 | * |
| 169 | * objectid corresponds to the inode number. |
| 170 | * |
| 171 | * type tells us things about the object, and is a kind of stream selector. |
| 172 | * so for a given inode, keys with type of 1 might refer to the inode data, |
| 173 | * type of 2 may point to file data in the btree and type == 3 may point to |
| 174 | * extents. |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 175 | * |
| 176 | * offset is the starting byte offset for this key in the stream. |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 177 | * |
| 178 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always |
| 179 | * in cpu native order. Otherwise they are identical and their sizes |
| 180 | * should be the same (ie both packed) |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 181 | */ |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 182 | struct btrfs_disk_key { |
| 183 | __le64 objectid; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 184 | u8 type; |
Chris Mason | 70b2bef | 2007-04-17 15:39:32 -0400 | [diff] [blame] | 185 | __le64 offset; |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 186 | } __attribute__ ((__packed__)); |
| 187 | |
| 188 | struct btrfs_key { |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 189 | u64 objectid; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 190 | u8 type; |
Chris Mason | 70b2bef | 2007-04-17 15:39:32 -0400 | [diff] [blame] | 191 | u64 offset; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 192 | } __attribute__ ((__packed__)); |
| 193 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 194 | struct btrfs_mapping_tree { |
| 195 | struct extent_map_tree map_tree; |
| 196 | }; |
| 197 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 198 | struct btrfs_dev_item { |
| 199 | /* the internal btrfs device id */ |
| 200 | __le64 devid; |
| 201 | |
| 202 | /* size of the device */ |
| 203 | __le64 total_bytes; |
| 204 | |
| 205 | /* bytes used */ |
| 206 | __le64 bytes_used; |
| 207 | |
| 208 | /* optimal io alignment for this device */ |
| 209 | __le32 io_align; |
| 210 | |
| 211 | /* optimal io width for this device */ |
| 212 | __le32 io_width; |
| 213 | |
| 214 | /* minimal io size for this device */ |
| 215 | __le32 sector_size; |
| 216 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 217 | /* type and info about this device */ |
| 218 | __le64 type; |
| 219 | |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 220 | /* expected generation for this device */ |
| 221 | __le64 generation; |
| 222 | |
Chris Mason | c3027eb | 2008-12-08 16:40:21 -0500 | [diff] [blame] | 223 | /* |
| 224 | * starting byte of this partition on the device, |
Wu Fengguang | d4a7894 | 2009-04-02 16:46:06 -0400 | [diff] [blame] | 225 | * to allow for stripe alignment in the future |
Chris Mason | c3027eb | 2008-12-08 16:40:21 -0500 | [diff] [blame] | 226 | */ |
| 227 | __le64 start_offset; |
| 228 | |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 229 | /* grouping information for allocation decisions */ |
| 230 | __le32 dev_group; |
| 231 | |
| 232 | /* seek speed 0-100 where 100 is fastest */ |
| 233 | u8 seek_speed; |
| 234 | |
| 235 | /* bandwidth 0-100 where 100 is fastest */ |
| 236 | u8 bandwidth; |
| 237 | |
Chris Mason | 0d81ba5 | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 238 | /* btrfs generated uuid for this device */ |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 239 | u8 uuid[BTRFS_UUID_SIZE]; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 240 | |
| 241 | /* uuid of FS who owns this device */ |
| 242 | u8 fsid[BTRFS_UUID_SIZE]; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 243 | } __attribute__ ((__packed__)); |
| 244 | |
| 245 | struct btrfs_stripe { |
| 246 | __le64 devid; |
| 247 | __le64 offset; |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 248 | u8 dev_uuid[BTRFS_UUID_SIZE]; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 249 | } __attribute__ ((__packed__)); |
| 250 | |
| 251 | struct btrfs_chunk { |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 252 | /* size of this chunk in bytes */ |
| 253 | __le64 length; |
| 254 | |
| 255 | /* objectid of the root referencing this chunk */ |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 256 | __le64 owner; |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 257 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 258 | __le64 stripe_len; |
| 259 | __le64 type; |
| 260 | |
| 261 | /* optimal io alignment for this chunk */ |
| 262 | __le32 io_align; |
| 263 | |
| 264 | /* optimal io width for this chunk */ |
| 265 | __le32 io_width; |
| 266 | |
| 267 | /* minimal io size for this chunk */ |
| 268 | __le32 sector_size; |
| 269 | |
| 270 | /* 2^16 stripes is quite a lot, a second limit is the size of a single |
| 271 | * item in the btree |
| 272 | */ |
| 273 | __le16 num_stripes; |
Chris Mason | 321aecc | 2008-04-16 10:49:51 -0400 | [diff] [blame] | 274 | |
| 275 | /* sub stripes only matter for raid10 */ |
| 276 | __le16 sub_stripes; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 277 | struct btrfs_stripe stripe; |
| 278 | /* additional stripes go here */ |
| 279 | } __attribute__ ((__packed__)); |
| 280 | |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 281 | #define BTRFS_FREE_SPACE_EXTENT 1 |
| 282 | #define BTRFS_FREE_SPACE_BITMAP 2 |
| 283 | |
| 284 | struct btrfs_free_space_entry { |
| 285 | __le64 offset; |
| 286 | __le64 bytes; |
| 287 | u8 type; |
| 288 | } __attribute__ ((__packed__)); |
| 289 | |
| 290 | struct btrfs_free_space_header { |
| 291 | struct btrfs_disk_key location; |
| 292 | __le64 generation; |
| 293 | __le64 num_entries; |
| 294 | __le64 num_bitmaps; |
| 295 | } __attribute__ ((__packed__)); |
| 296 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 297 | static inline unsigned long btrfs_chunk_item_size(int num_stripes) |
| 298 | { |
| 299 | BUG_ON(num_stripes == 0); |
| 300 | return sizeof(struct btrfs_chunk) + |
| 301 | sizeof(struct btrfs_stripe) * (num_stripes - 1); |
| 302 | } |
| 303 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 304 | #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0) |
| 305 | #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1) |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 306 | |
| 307 | /* |
| 308 | * File system states |
| 309 | */ |
| 310 | |
| 311 | /* Errors detected */ |
| 312 | #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2) |
| 313 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 314 | #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32) |
| 315 | #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33) |
| 316 | |
| 317 | #define BTRFS_BACKREF_REV_MAX 256 |
| 318 | #define BTRFS_BACKREF_REV_SHIFT 56 |
| 319 | #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ |
| 320 | BTRFS_BACKREF_REV_SHIFT) |
| 321 | |
| 322 | #define BTRFS_OLD_BACKREF_REV 0 |
| 323 | #define BTRFS_MIXED_BACKREF_REV 1 |
Chris Mason | 63b10fc | 2008-04-01 11:21:32 -0400 | [diff] [blame] | 324 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 325 | /* |
| 326 | * every tree block (leaf or node) starts with this header. |
| 327 | */ |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 328 | struct btrfs_header { |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 329 | /* these first four must match the super block */ |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 330 | u8 csum[BTRFS_CSUM_SIZE]; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 331 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 332 | __le64 bytenr; /* which block this node is supposed to live in */ |
Chris Mason | 63b10fc | 2008-04-01 11:21:32 -0400 | [diff] [blame] | 333 | __le64 flags; |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 334 | |
| 335 | /* allowed to be different from the super from here on down */ |
| 336 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
Chris Mason | 7f5c151 | 2007-03-23 15:56:19 -0400 | [diff] [blame] | 337 | __le64 generation; |
Chris Mason | 4d77567 | 2007-04-20 20:23:12 -0400 | [diff] [blame] | 338 | __le64 owner; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 339 | __le32 nritems; |
Chris Mason | 9a6f11e | 2007-03-27 09:06:38 -0400 | [diff] [blame] | 340 | u8 level; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 341 | } __attribute__ ((__packed__)); |
| 342 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 343 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 344 | sizeof(struct btrfs_header)) / \ |
| 345 | sizeof(struct btrfs_key_ptr)) |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 346 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 347 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) |
Chris Mason | 236454df | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 348 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
| 349 | sizeof(struct btrfs_item) - \ |
| 350 | sizeof(struct btrfs_file_extent_item)) |
Yan, Zheng | f34f57a | 2009-11-12 09:35:27 +0000 | [diff] [blame] | 351 | #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
| 352 | sizeof(struct btrfs_item) -\ |
| 353 | sizeof(struct btrfs_dir_item)) |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 354 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 355 | |
| 356 | /* |
| 357 | * this is a very generous portion of the super block, giving us |
| 358 | * room to translate 14 chunks with 3 stripes each. |
| 359 | */ |
| 360 | #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 |
Chris Mason | 7ae9c09 | 2008-04-18 10:29:49 -0400 | [diff] [blame] | 361 | #define BTRFS_LABEL_SIZE 256 |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 362 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 363 | /* |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 364 | * just in case we somehow lose the roots and are not able to mount, |
| 365 | * we store an array of the roots from previous transactions |
| 366 | * in the super. |
| 367 | */ |
| 368 | #define BTRFS_NUM_BACKUP_ROOTS 4 |
| 369 | struct btrfs_root_backup { |
| 370 | __le64 tree_root; |
| 371 | __le64 tree_root_gen; |
| 372 | |
| 373 | __le64 chunk_root; |
| 374 | __le64 chunk_root_gen; |
| 375 | |
| 376 | __le64 extent_root; |
| 377 | __le64 extent_root_gen; |
| 378 | |
| 379 | __le64 fs_root; |
| 380 | __le64 fs_root_gen; |
| 381 | |
| 382 | __le64 dev_root; |
| 383 | __le64 dev_root_gen; |
| 384 | |
| 385 | __le64 csum_root; |
| 386 | __le64 csum_root_gen; |
| 387 | |
| 388 | __le64 total_bytes; |
| 389 | __le64 bytes_used; |
| 390 | __le64 num_devices; |
| 391 | /* future */ |
| 392 | __le64 unsed_64[4]; |
| 393 | |
| 394 | u8 tree_root_level; |
| 395 | u8 chunk_root_level; |
| 396 | u8 extent_root_level; |
| 397 | u8 fs_root_level; |
| 398 | u8 dev_root_level; |
| 399 | u8 csum_root_level; |
| 400 | /* future and to align */ |
| 401 | u8 unused_8[10]; |
| 402 | } __attribute__ ((__packed__)); |
| 403 | |
| 404 | /* |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 405 | * the super block basically lists the main trees of the FS |
| 406 | * it currently lacks any block count etc etc |
| 407 | */ |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 408 | struct btrfs_super_block { |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 409 | u8 csum[BTRFS_CSUM_SIZE]; |
Chris Mason | 63b10fc | 2008-04-01 11:21:32 -0400 | [diff] [blame] | 410 | /* the first 4 fields must match struct btrfs_header */ |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 411 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 412 | __le64 bytenr; /* this block number */ |
Chris Mason | 63b10fc | 2008-04-01 11:21:32 -0400 | [diff] [blame] | 413 | __le64 flags; |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 414 | |
| 415 | /* allowed to be different from the btrfs_header from here own down */ |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 416 | __le64 magic; |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 417 | __le64 generation; |
| 418 | __le64 root; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 419 | __le64 chunk_root; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 420 | __le64 log_root; |
Chris Mason | c3027eb | 2008-12-08 16:40:21 -0500 | [diff] [blame] | 421 | |
| 422 | /* this will help find the new super based on the log root */ |
| 423 | __le64 log_root_transid; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 424 | __le64 total_bytes; |
| 425 | __le64 bytes_used; |
Chris Mason | 2e635a2 | 2007-03-21 11:12:56 -0400 | [diff] [blame] | 426 | __le64 root_dir_objectid; |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 427 | __le64 num_devices; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 428 | __le32 sectorsize; |
| 429 | __le32 nodesize; |
| 430 | __le32 leafsize; |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 431 | __le32 stripesize; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 432 | __le32 sys_chunk_array_size; |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 433 | __le64 chunk_root_generation; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 434 | __le64 compat_flags; |
| 435 | __le64 compat_ro_flags; |
| 436 | __le64 incompat_flags; |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 437 | __le16 csum_type; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 438 | u8 root_level; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 439 | u8 chunk_root_level; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 440 | u8 log_root_level; |
Chris Mason | 0d81ba5 | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 441 | struct btrfs_dev_item dev_item; |
Chris Mason | c3027eb | 2008-12-08 16:40:21 -0500 | [diff] [blame] | 442 | |
Chris Mason | 7ae9c09 | 2008-04-18 10:29:49 -0400 | [diff] [blame] | 443 | char label[BTRFS_LABEL_SIZE]; |
Chris Mason | c3027eb | 2008-12-08 16:40:21 -0500 | [diff] [blame] | 444 | |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 445 | __le64 cache_generation; |
| 446 | |
Chris Mason | c3027eb | 2008-12-08 16:40:21 -0500 | [diff] [blame] | 447 | /* future expansion */ |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 448 | __le64 reserved[31]; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 449 | u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 450 | struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; |
Chris Mason | cfaa729 | 2007-02-21 17:04:57 -0500 | [diff] [blame] | 451 | } __attribute__ ((__packed__)); |
| 452 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 453 | /* |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 454 | * Compat flags that we support. If any incompat flags are set other than the |
| 455 | * ones specified below then we will fail to mount |
| 456 | */ |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 457 | #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0) |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 458 | #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1) |
Josef Bacik | 6737773 | 2010-09-16 16:19:09 -0400 | [diff] [blame] | 459 | #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2) |
Li Zefan | a6fa6fa | 2010-10-25 15:12:26 +0800 | [diff] [blame] | 460 | #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3) |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 461 | |
| 462 | #define BTRFS_FEATURE_COMPAT_SUPP 0ULL |
| 463 | #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 464 | #define BTRFS_FEATURE_INCOMPAT_SUPP \ |
| 465 | (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ |
Josef Bacik | 6737773 | 2010-09-16 16:19:09 -0400 | [diff] [blame] | 466 | BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ |
Li Zefan | a6fa6fa | 2010-10-25 15:12:26 +0800 | [diff] [blame] | 467 | BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ |
| 468 | BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO) |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 469 | |
| 470 | /* |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 471 | * 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] | 472 | * the item in the leaf (relative to the start of the data area) |
| 473 | */ |
Chris Mason | 0783fcf | 2007-03-12 20:12:07 -0400 | [diff] [blame] | 474 | struct btrfs_item { |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 475 | struct btrfs_disk_key key; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 476 | __le32 offset; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 477 | __le32 size; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 478 | } __attribute__ ((__packed__)); |
| 479 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 480 | /* |
| 481 | * leaves have an item area and a data area: |
| 482 | * [item0, item1....itemN] [free space] [dataN...data1, data0] |
| 483 | * |
| 484 | * The data is separate from the items to get the keys closer together |
| 485 | * during searches. |
| 486 | */ |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 487 | struct btrfs_leaf { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 488 | struct btrfs_header header; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 489 | struct btrfs_item items[]; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 490 | } __attribute__ ((__packed__)); |
| 491 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 492 | /* |
| 493 | * all non-leaf blocks are nodes, they hold only keys and pointers to |
| 494 | * other blocks |
| 495 | */ |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 496 | struct btrfs_key_ptr { |
| 497 | struct btrfs_disk_key key; |
| 498 | __le64 blockptr; |
Chris Mason | 74493f7 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 499 | __le64 generation; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 500 | } __attribute__ ((__packed__)); |
| 501 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 502 | struct btrfs_node { |
Chris Mason | bb492bb | 2007-03-12 12:29:44 -0400 | [diff] [blame] | 503 | struct btrfs_header header; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 504 | struct btrfs_key_ptr ptrs[]; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 505 | } __attribute__ ((__packed__)); |
| 506 | |
Chris Mason | fec577f | 2007-02-26 10:40:21 -0500 | [diff] [blame] | 507 | /* |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 508 | * btrfs_paths remember the path taken from the root down to the leaf. |
| 509 | * 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] | 510 | * to any other levels that are present. |
| 511 | * |
| 512 | * The slots array records the index of the item or block pointer |
| 513 | * used while walking the tree. |
| 514 | */ |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 515 | struct btrfs_path { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 516 | struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 517 | int slots[BTRFS_MAX_LEVEL]; |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 518 | /* if there is real range locking, this locks field will change */ |
| 519 | int locks[BTRFS_MAX_LEVEL]; |
Chris Mason | 3c69fae | 2007-08-07 15:52:22 -0400 | [diff] [blame] | 520 | int reada; |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 521 | /* keep some upper locks as we walk down */ |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 522 | int lowest_level; |
Chris Mason | 459931e | 2008-12-10 09:10:46 -0500 | [diff] [blame] | 523 | |
| 524 | /* |
| 525 | * set by btrfs_split_item, tells search_slot to keep all locks |
| 526 | * and to force calls to keep space in the nodes |
| 527 | */ |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 528 | unsigned int search_for_split:1; |
| 529 | unsigned int keep_locks:1; |
| 530 | unsigned int skip_locking:1; |
| 531 | unsigned int leave_spinning:1; |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 532 | unsigned int search_commit_root:1; |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 533 | }; |
Chris Mason | 5de08d7 | 2007-02-24 06:24:44 -0500 | [diff] [blame] | 534 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 535 | /* |
| 536 | * items in the extent btree are used to record the objectid of the |
| 537 | * owner of the block and the number of references |
| 538 | */ |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 539 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 540 | struct btrfs_extent_item { |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 541 | __le64 refs; |
| 542 | __le64 generation; |
| 543 | __le64 flags; |
| 544 | } __attribute__ ((__packed__)); |
| 545 | |
| 546 | struct btrfs_extent_item_v0 { |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 547 | __le32 refs; |
Chris Mason | 74493f7 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 548 | } __attribute__ ((__packed__)); |
| 549 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 550 | #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \ |
| 551 | sizeof(struct btrfs_item)) |
| 552 | |
| 553 | #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0) |
| 554 | #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1) |
| 555 | |
| 556 | /* following flags only apply to tree blocks */ |
| 557 | |
| 558 | /* use full backrefs for extent pointers in the block */ |
| 559 | #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8) |
| 560 | |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 561 | /* |
| 562 | * this flag is only used internally by scrub and may be changed at any time |
| 563 | * it is only declared here to avoid collisions |
| 564 | */ |
| 565 | #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48) |
| 566 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 567 | struct btrfs_tree_block_info { |
| 568 | struct btrfs_disk_key key; |
| 569 | u8 level; |
| 570 | } __attribute__ ((__packed__)); |
| 571 | |
| 572 | struct btrfs_extent_data_ref { |
| 573 | __le64 root; |
| 574 | __le64 objectid; |
| 575 | __le64 offset; |
| 576 | __le32 count; |
| 577 | } __attribute__ ((__packed__)); |
| 578 | |
| 579 | struct btrfs_shared_data_ref { |
| 580 | __le32 count; |
| 581 | } __attribute__ ((__packed__)); |
| 582 | |
| 583 | struct btrfs_extent_inline_ref { |
| 584 | u8 type; |
Yan Zheng | 1bec1ae | 2009-07-22 09:59:00 -0400 | [diff] [blame] | 585 | __le64 offset; |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 586 | } __attribute__ ((__packed__)); |
| 587 | |
| 588 | /* old style backrefs item */ |
| 589 | struct btrfs_extent_ref_v0 { |
Chris Mason | 74493f7 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 590 | __le64 root; |
| 591 | __le64 generation; |
| 592 | __le64 objectid; |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 593 | __le32 count; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 594 | } __attribute__ ((__packed__)); |
| 595 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 596 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 597 | /* dev extents record free space on individual devices. The owner |
| 598 | * field points back to the chunk allocation mapping tree that allocated |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 599 | * 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] | 600 | */ |
| 601 | struct btrfs_dev_extent { |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 602 | __le64 chunk_tree; |
| 603 | __le64 chunk_objectid; |
| 604 | __le64 chunk_offset; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 605 | __le64 length; |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 606 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 607 | } __attribute__ ((__packed__)); |
| 608 | |
Chris Mason | 3954401 | 2007-12-12 14:38:19 -0500 | [diff] [blame] | 609 | struct btrfs_inode_ref { |
Josef Bacik | aec7477 | 2008-07-24 12:12:38 -0400 | [diff] [blame] | 610 | __le64 index; |
Chris Mason | 3954401 | 2007-12-12 14:38:19 -0500 | [diff] [blame] | 611 | __le16 name_len; |
| 612 | /* name goes here */ |
| 613 | } __attribute__ ((__packed__)); |
| 614 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 615 | struct btrfs_timespec { |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 616 | __le64 sec; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 617 | __le32 nsec; |
| 618 | } __attribute__ ((__packed__)); |
| 619 | |
Jan Engelhardt | 95029d7 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 620 | enum btrfs_compression_type { |
Li Zefan | 261507a0 | 2010-12-17 14:21:50 +0800 | [diff] [blame] | 621 | BTRFS_COMPRESS_NONE = 0, |
| 622 | BTRFS_COMPRESS_ZLIB = 1, |
Li Zefan | a6fa6fa | 2010-10-25 15:12:26 +0800 | [diff] [blame] | 623 | BTRFS_COMPRESS_LZO = 2, |
| 624 | BTRFS_COMPRESS_TYPES = 2, |
| 625 | BTRFS_COMPRESS_LAST = 3, |
Jan Engelhardt | 95029d7 | 2009-01-21 10:49:16 -0500 | [diff] [blame] | 626 | }; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 627 | |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 628 | struct btrfs_inode_item { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 629 | /* nfs style generation number */ |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 630 | __le64 generation; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 631 | /* transid that last touched this inode */ |
| 632 | __le64 transid; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 633 | __le64 size; |
Yan Zheng | a76a3cd | 2008-10-09 11:46:29 -0400 | [diff] [blame] | 634 | __le64 nbytes; |
Chris Mason | 31f3c99 | 2007-04-30 15:25:45 -0400 | [diff] [blame] | 635 | __le64 block_group; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 636 | __le32 nlink; |
| 637 | __le32 uid; |
| 638 | __le32 gid; |
| 639 | __le32 mode; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 640 | __le64 rdev; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 641 | __le64 flags; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 642 | |
Chris Mason | c3027eb | 2008-12-08 16:40:21 -0500 | [diff] [blame] | 643 | /* modification sequence number for NFS */ |
| 644 | __le64 sequence; |
| 645 | |
| 646 | /* |
| 647 | * a little future expansion, for more than this we can |
| 648 | * just grow the inode item and version it |
| 649 | */ |
| 650 | __le64 reserved[4]; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 651 | struct btrfs_timespec atime; |
| 652 | struct btrfs_timespec ctime; |
| 653 | struct btrfs_timespec mtime; |
| 654 | struct btrfs_timespec otime; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 655 | } __attribute__ ((__packed__)); |
| 656 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 657 | struct btrfs_dir_log_item { |
| 658 | __le64 end; |
| 659 | } __attribute__ ((__packed__)); |
| 660 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 661 | struct btrfs_dir_item { |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 662 | struct btrfs_disk_key location; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 663 | __le64 transid; |
Josef Bacik | 5103e94 | 2007-11-16 11:45:54 -0500 | [diff] [blame] | 664 | __le16 data_len; |
Chris Mason | a8a2ee0 | 2007-03-16 08:46:49 -0400 | [diff] [blame] | 665 | __le16 name_len; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 666 | u8 type; |
| 667 | } __attribute__ ((__packed__)); |
| 668 | |
Li Zefan | b83cc96 | 2010-12-20 16:04:08 +0800 | [diff] [blame] | 669 | #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0) |
| 670 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 671 | struct btrfs_root_item { |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 672 | struct btrfs_inode_item inode; |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 673 | __le64 generation; |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 674 | __le64 root_dirid; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 675 | __le64 bytenr; |
| 676 | __le64 byte_limit; |
| 677 | __le64 bytes_used; |
Yan Zheng | 80ff385 | 2008-10-30 14:20:02 -0400 | [diff] [blame] | 678 | __le64 last_snapshot; |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 679 | __le64 flags; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 680 | __le32 refs; |
Chris Mason | 5eda7b5 | 2007-06-22 14:16:25 -0400 | [diff] [blame] | 681 | struct btrfs_disk_key drop_progress; |
| 682 | u8 drop_level; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 683 | u8 level; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 684 | } __attribute__ ((__packed__)); |
| 685 | |
Chris Mason | 0660b5a | 2008-11-17 20:37:39 -0500 | [diff] [blame] | 686 | /* |
| 687 | * this is used for both forward and backward root refs |
| 688 | */ |
| 689 | struct btrfs_root_ref { |
| 690 | __le64 dirid; |
| 691 | __le64 sequence; |
| 692 | __le16 name_len; |
| 693 | } __attribute__ ((__packed__)); |
| 694 | |
Yan Zheng | d899e05 | 2008-10-30 14:25:28 -0400 | [diff] [blame] | 695 | #define BTRFS_FILE_EXTENT_INLINE 0 |
| 696 | #define BTRFS_FILE_EXTENT_REG 1 |
| 697 | #define BTRFS_FILE_EXTENT_PREALLOC 2 |
Chris Mason | 236454df | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 698 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 699 | struct btrfs_file_extent_item { |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 700 | /* |
| 701 | * transaction id that created this extent |
| 702 | */ |
Chris Mason | 71951f3 | 2007-03-27 09:16:29 -0400 | [diff] [blame] | 703 | __le64 generation; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 704 | /* |
| 705 | * max number of bytes to hold this extent in ram |
| 706 | * when we split a compressed extent we can't know how big |
| 707 | * each of the resulting pieces will be. So, this is |
| 708 | * an upper limit on the size of the extent in ram instead of |
| 709 | * an exact limit. |
| 710 | */ |
| 711 | __le64 ram_bytes; |
| 712 | |
| 713 | /* |
| 714 | * 32 bits for the various ways we might encode the data, |
| 715 | * including compression and encryption. If any of these |
| 716 | * are set to something a given disk format doesn't understand |
| 717 | * it is treated like an incompat flag for reading and writing, |
| 718 | * but not for stat. |
| 719 | */ |
| 720 | u8 compression; |
| 721 | u8 encryption; |
| 722 | __le16 other_encoding; /* spare for later use */ |
| 723 | |
| 724 | /* are we inline data or a real extent? */ |
Chris Mason | 236454df | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 725 | u8 type; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 726 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 727 | /* |
| 728 | * disk space consumed by the extent, checksum blocks are included |
| 729 | * in these numbers |
| 730 | */ |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 731 | __le64 disk_bytenr; |
| 732 | __le64 disk_num_bytes; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 733 | /* |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 734 | * the logical offset in file blocks (no csums) |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 735 | * this extent record is for. This allows a file extent to point |
| 736 | * into the middle of an existing extent on disk, sharing it |
| 737 | * between two snapshots (useful if some bytes in the middle of the |
| 738 | * extent have changed |
| 739 | */ |
| 740 | __le64 offset; |
| 741 | /* |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 742 | * the logical number of file blocks (no csums included). This |
| 743 | * always reflects the size uncompressed and without encoding. |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 744 | */ |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 745 | __le64 num_bytes; |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 746 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 747 | } __attribute__ ((__packed__)); |
| 748 | |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 749 | struct btrfs_csum_item { |
Chris Mason | 509659c | 2007-05-10 12:36:17 -0400 | [diff] [blame] | 750 | u8 csum; |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 751 | } __attribute__ ((__packed__)); |
| 752 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 753 | /* different types of block groups (and chunks) */ |
| 754 | #define BTRFS_BLOCK_GROUP_DATA (1 << 0) |
| 755 | #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1) |
| 756 | #define BTRFS_BLOCK_GROUP_METADATA (1 << 2) |
Chris Mason | 593060d | 2008-03-25 16:50:33 -0400 | [diff] [blame] | 757 | #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3) |
Chris Mason | 8790d50 | 2008-04-03 16:29:03 -0400 | [diff] [blame] | 758 | #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4) |
Chris Mason | 611f0e0 | 2008-04-03 16:29:03 -0400 | [diff] [blame] | 759 | #define BTRFS_BLOCK_GROUP_DUP (1 << 5) |
Chris Mason | 321aecc | 2008-04-16 10:49:51 -0400 | [diff] [blame] | 760 | #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6) |
Yan, Zheng | b742bb8 | 2010-05-16 10:46:24 -0400 | [diff] [blame] | 761 | #define BTRFS_NR_RAID_TYPES 5 |
Chris Mason | 1e2677e | 2007-05-29 16:52:18 -0400 | [diff] [blame] | 762 | |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 763 | struct btrfs_block_group_item { |
| 764 | __le64 used; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 765 | __le64 chunk_objectid; |
| 766 | __le64 flags; |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 767 | } __attribute__ ((__packed__)); |
| 768 | |
Chris Mason | 6324fbf | 2008-03-24 15:01:59 -0400 | [diff] [blame] | 769 | struct btrfs_space_info { |
| 770 | u64 flags; |
Josef Bacik | 6a63209 | 2009-02-20 11:00:09 -0500 | [diff] [blame] | 771 | |
Josef Bacik | 89a5589 | 2010-10-14 14:52:27 -0400 | [diff] [blame] | 772 | u64 total_bytes; /* total bytes in the space, |
| 773 | this doesn't take mirrors into account */ |
Yan, Zheng | b742bb8 | 2010-05-16 10:46:24 -0400 | [diff] [blame] | 774 | u64 bytes_used; /* total bytes used, |
Lucas De Marchi | e9c5499 | 2011-04-26 23:28:26 -0700 | [diff] [blame] | 775 | this doesn't take mirrors into account */ |
Josef Bacik | 6a63209 | 2009-02-20 11:00:09 -0500 | [diff] [blame] | 776 | u64 bytes_pinned; /* total bytes pinned, will be freed when the |
| 777 | transaction finishes */ |
| 778 | u64 bytes_reserved; /* total bytes the allocator has reserved for |
| 779 | current allocations */ |
| 780 | u64 bytes_readonly; /* total bytes that are read only */ |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 781 | |
Josef Bacik | 6a63209 | 2009-02-20 11:00:09 -0500 | [diff] [blame] | 782 | u64 bytes_may_use; /* number of bytes that may be used for |
Josef Bacik | 9ed74f2 | 2009-09-11 16:12:44 -0400 | [diff] [blame] | 783 | delalloc/allocations */ |
Yan, Zheng | b742bb8 | 2010-05-16 10:46:24 -0400 | [diff] [blame] | 784 | u64 disk_used; /* total bytes used on disk */ |
Josef Bacik | 89a5589 | 2010-10-14 14:52:27 -0400 | [diff] [blame] | 785 | u64 disk_total; /* total bytes on disk, takes mirrors into |
| 786 | account */ |
Josef Bacik | 6a63209 | 2009-02-20 11:00:09 -0500 | [diff] [blame] | 787 | |
Chris Mason | 36e39c4 | 2011-03-12 07:08:42 -0500 | [diff] [blame] | 788 | /* |
| 789 | * we bump reservation progress every time we decrement |
| 790 | * bytes_reserved. This way people waiting for reservations |
| 791 | * know something good has happened and they can check |
| 792 | * for progress. The number here isn't to be trusted, it |
| 793 | * just shows reclaim activity |
| 794 | */ |
| 795 | unsigned long reservation_progress; |
| 796 | |
David Sterba | 4ea0288 | 2011-05-12 18:13:12 +0200 | [diff] [blame] | 797 | unsigned int full:1; /* indicates that we cannot allocate any more |
Josef Bacik | 6a63209 | 2009-02-20 11:00:09 -0500 | [diff] [blame] | 798 | chunks for this space */ |
David Sterba | 4ea0288 | 2011-05-12 18:13:12 +0200 | [diff] [blame] | 799 | unsigned int chunk_alloc:1; /* set if we are allocating a chunk */ |
Josef Bacik | 6d74119 | 2011-04-11 20:20:11 -0400 | [diff] [blame] | 800 | |
Josef Bacik | fdb5eff | 2011-06-07 16:07:44 -0400 | [diff] [blame] | 801 | unsigned int flush:1; /* set if we are trying to make space */ |
| 802 | |
David Sterba | 4ea0288 | 2011-05-12 18:13:12 +0200 | [diff] [blame] | 803 | unsigned int force_alloc; /* set if we need to force a chunk |
| 804 | alloc for this space */ |
Josef Bacik | 6a63209 | 2009-02-20 11:00:09 -0500 | [diff] [blame] | 805 | |
Chris Mason | 6324fbf | 2008-03-24 15:01:59 -0400 | [diff] [blame] | 806 | struct list_head list; |
Josef Bacik | 0f9dd46 | 2008-09-23 13:14:11 -0400 | [diff] [blame] | 807 | |
| 808 | /* for block groups in our same type */ |
Yan, Zheng | b742bb8 | 2010-05-16 10:46:24 -0400 | [diff] [blame] | 809 | struct list_head block_groups[BTRFS_NR_RAID_TYPES]; |
Josef Bacik | 0f9dd46 | 2008-09-23 13:14:11 -0400 | [diff] [blame] | 810 | spinlock_t lock; |
Josef Bacik | 80eb234 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 811 | struct rw_semaphore groups_sem; |
Josef Bacik | fdb5eff | 2011-06-07 16:07:44 -0400 | [diff] [blame] | 812 | wait_queue_head_t wait; |
Josef Bacik | 0f9dd46 | 2008-09-23 13:14:11 -0400 | [diff] [blame] | 813 | }; |
| 814 | |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 815 | struct btrfs_block_rsv { |
| 816 | u64 size; |
| 817 | u64 reserved; |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 818 | struct btrfs_space_info *space_info; |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 819 | spinlock_t lock; |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 820 | unsigned int full:1; |
| 821 | }; |
| 822 | |
Chris Mason | fa9c0d79 | 2009-04-03 09:47:43 -0400 | [diff] [blame] | 823 | /* |
| 824 | * free clusters are used to claim free space in relatively large chunks, |
| 825 | * allowing us to do less seeky writes. They are used for all metadata |
| 826 | * allocations and data allocations in ssd mode. |
| 827 | */ |
| 828 | struct btrfs_free_cluster { |
| 829 | spinlock_t lock; |
| 830 | spinlock_t refill_lock; |
| 831 | struct rb_root root; |
| 832 | |
| 833 | /* largest extent in this cluster */ |
| 834 | u64 max_size; |
| 835 | |
| 836 | /* first extent starting offset */ |
| 837 | u64 window_start; |
| 838 | |
| 839 | struct btrfs_block_group_cache *block_group; |
| 840 | /* |
| 841 | * when a cluster is allocated from a block group, we put the |
| 842 | * cluster onto a list in the block group so that it can |
| 843 | * be freed before the block group is freed. |
| 844 | */ |
| 845 | struct list_head block_group_list; |
Chris Mason | 6324fbf | 2008-03-24 15:01:59 -0400 | [diff] [blame] | 846 | }; |
| 847 | |
Josef Bacik | 817d52f | 2009-07-13 21:29:25 -0400 | [diff] [blame] | 848 | enum btrfs_caching_type { |
| 849 | BTRFS_CACHE_NO = 0, |
| 850 | BTRFS_CACHE_STARTED = 1, |
Josef Bacik | 291c7d2 | 2011-11-14 13:52:14 -0500 | [diff] [blame] | 851 | BTRFS_CACHE_FAST = 2, |
| 852 | BTRFS_CACHE_FINISHED = 3, |
Josef Bacik | 817d52f | 2009-07-13 21:29:25 -0400 | [diff] [blame] | 853 | }; |
| 854 | |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 855 | enum btrfs_disk_cache_state { |
| 856 | BTRFS_DC_WRITTEN = 0, |
| 857 | BTRFS_DC_ERROR = 1, |
| 858 | BTRFS_DC_CLEAR = 2, |
| 859 | BTRFS_DC_SETUP = 3, |
| 860 | BTRFS_DC_NEED_WRITE = 4, |
| 861 | }; |
| 862 | |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 863 | struct btrfs_caching_control { |
| 864 | struct list_head list; |
| 865 | struct mutex mutex; |
| 866 | wait_queue_head_t wait; |
Josef Bacik | bab39bf | 2011-06-30 14:42:28 -0400 | [diff] [blame] | 867 | struct btrfs_work work; |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 868 | struct btrfs_block_group_cache *block_group; |
| 869 | u64 progress; |
| 870 | atomic_t count; |
| 871 | }; |
| 872 | |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 873 | struct btrfs_block_group_cache { |
| 874 | struct btrfs_key key; |
| 875 | struct btrfs_block_group_item item; |
Josef Bacik | 817d52f | 2009-07-13 21:29:25 -0400 | [diff] [blame] | 876 | struct btrfs_fs_info *fs_info; |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 877 | struct inode *inode; |
Chris Mason | c286ac4 | 2008-07-22 23:06:41 -0400 | [diff] [blame] | 878 | spinlock_t lock; |
Yan | 324ae4d | 2007-11-16 14:57:08 -0500 | [diff] [blame] | 879 | u64 pinned; |
Zheng Yan | e856981 | 2008-09-26 10:05:48 -0400 | [diff] [blame] | 880 | u64 reserved; |
Josef Bacik | 1b2da37 | 2009-09-11 16:11:20 -0400 | [diff] [blame] | 881 | u64 bytes_super; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 882 | u64 flags; |
Josef Bacik | 9630308 | 2009-07-13 21:29:25 -0400 | [diff] [blame] | 883 | u64 sectorsize; |
Josef Bacik | 5b0e95b | 2011-10-06 08:58:24 -0400 | [diff] [blame] | 884 | u64 cache_generation; |
Mariusz Kozlowski | 0410c94 | 2010-11-20 12:03:07 +0000 | [diff] [blame] | 885 | unsigned int ro:1; |
| 886 | unsigned int dirty:1; |
| 887 | unsigned int iref:1; |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 888 | |
| 889 | int disk_cache_state; |
Josef Bacik | 0f9dd46 | 2008-09-23 13:14:11 -0400 | [diff] [blame] | 890 | |
Josef Bacik | 817d52f | 2009-07-13 21:29:25 -0400 | [diff] [blame] | 891 | /* cache tracking stuff */ |
Josef Bacik | 817d52f | 2009-07-13 21:29:25 -0400 | [diff] [blame] | 892 | int cached; |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 893 | struct btrfs_caching_control *caching_ctl; |
| 894 | u64 last_byte_to_unpin; |
Josef Bacik | 817d52f | 2009-07-13 21:29:25 -0400 | [diff] [blame] | 895 | |
Josef Bacik | 0f9dd46 | 2008-09-23 13:14:11 -0400 | [diff] [blame] | 896 | struct btrfs_space_info *space_info; |
| 897 | |
| 898 | /* free space cache stuff */ |
Li Zefan | 34d52cb | 2011-03-29 13:46:06 +0800 | [diff] [blame] | 899 | struct btrfs_free_space_ctl *free_space_ctl; |
Josef Bacik | 0f9dd46 | 2008-09-23 13:14:11 -0400 | [diff] [blame] | 900 | |
| 901 | /* block group cache stuff */ |
| 902 | struct rb_node cache_node; |
| 903 | |
| 904 | /* for block groups in the same raid type */ |
| 905 | struct list_head list; |
Yan Zheng | d2fb343 | 2008-12-11 16:30:39 -0500 | [diff] [blame] | 906 | |
| 907 | /* usage count */ |
| 908 | atomic_t count; |
Chris Mason | fa9c0d79 | 2009-04-03 09:47:43 -0400 | [diff] [blame] | 909 | |
| 910 | /* List of struct btrfs_free_clusters for this block group. |
| 911 | * Today it will only have one thing on it, but that may change |
| 912 | */ |
| 913 | struct list_head cluster_list; |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 914 | }; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 915 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 916 | struct reloc_control; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 917 | struct btrfs_device; |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 918 | struct btrfs_fs_devices; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 919 | struct btrfs_delayed_root; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 920 | struct btrfs_fs_info { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 921 | u8 fsid[BTRFS_FSID_SIZE]; |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 922 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 923 | struct btrfs_root *extent_root; |
| 924 | struct btrfs_root *tree_root; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 925 | struct btrfs_root *chunk_root; |
| 926 | struct btrfs_root *dev_root; |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 927 | struct btrfs_root *fs_root; |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 928 | struct btrfs_root *csum_root; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 929 | |
| 930 | /* the log root tree is a directory of all the other log roots */ |
| 931 | struct btrfs_root *log_root_tree; |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 932 | |
| 933 | spinlock_t fs_roots_radix_lock; |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 934 | struct radix_tree_root fs_roots_radix; |
Chris Mason | 1a5bc16 | 2007-10-15 16:15:26 -0400 | [diff] [blame] | 935 | |
Josef Bacik | 0f9dd46 | 2008-09-23 13:14:11 -0400 | [diff] [blame] | 936 | /* block group cache stuff */ |
| 937 | spinlock_t block_group_cache_lock; |
| 938 | struct rb_root block_group_cache_tree; |
| 939 | |
Josef Bacik | 2bf6475 | 2011-09-26 17:12:22 -0400 | [diff] [blame] | 940 | /* keep track of unallocated space */ |
| 941 | spinlock_t free_chunk_lock; |
| 942 | u64 free_chunk_space; |
| 943 | |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 944 | struct extent_io_tree freed_extents[2]; |
| 945 | struct extent_io_tree *pinned_extents; |
Chris Mason | 1a5bc16 | 2007-10-15 16:15:26 -0400 | [diff] [blame] | 946 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 947 | /* logical->physical extent mapping */ |
| 948 | struct btrfs_mapping_tree mapping_tree; |
| 949 | |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 950 | /* |
| 951 | * block reservation for extent, checksum, root tree and |
| 952 | * delayed dir index item |
| 953 | */ |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 954 | struct btrfs_block_rsv global_block_rsv; |
| 955 | /* block reservation for delay allocation */ |
| 956 | struct btrfs_block_rsv delalloc_block_rsv; |
| 957 | /* block reservation for metadata operations */ |
| 958 | struct btrfs_block_rsv trans_block_rsv; |
| 959 | /* block reservation for chunk tree */ |
| 960 | struct btrfs_block_rsv chunk_block_rsv; |
Josef Bacik | 6d668dd | 2011-11-03 22:54:25 -0400 | [diff] [blame] | 961 | /* block reservation for delayed operations */ |
| 962 | struct btrfs_block_rsv delayed_block_rsv; |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 963 | |
| 964 | struct btrfs_block_rsv empty_block_rsv; |
| 965 | |
Chris Mason | 293ffd5 | 2007-03-20 15:57:25 -0400 | [diff] [blame] | 966 | u64 generation; |
Josef Bacik | 15ee9bc | 2007-08-10 16:22:09 -0400 | [diff] [blame] | 967 | u64 last_trans_committed; |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 968 | |
| 969 | /* |
| 970 | * this is updated to the current trans every time a full commit |
| 971 | * is required instead of the faster short fsync log commits |
| 972 | */ |
| 973 | u64 last_trans_log_full_commit; |
Li Zefan | 261507a0 | 2010-12-17 14:21:50 +0800 | [diff] [blame] | 974 | unsigned long mount_opt:20; |
| 975 | unsigned long compress_type:4; |
Chris Mason | 6f568d3 | 2008-01-29 16:03:38 -0500 | [diff] [blame] | 976 | u64 max_inline; |
Chris Mason | 8f662a7 | 2008-01-02 10:01:11 -0500 | [diff] [blame] | 977 | u64 alloc_start; |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 978 | struct btrfs_transaction *running_transaction; |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 979 | wait_queue_head_t transaction_throttle; |
Chris Mason | f929574 | 2008-07-17 12:54:14 -0400 | [diff] [blame] | 980 | wait_queue_head_t transaction_wait; |
Sage Weil | bb9c12c | 2010-10-29 15:37:34 -0400 | [diff] [blame] | 981 | wait_queue_head_t transaction_blocked_wait; |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 982 | wait_queue_head_t async_submit_wait; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 983 | |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 984 | struct btrfs_super_block *super_copy; |
| 985 | struct btrfs_super_block *super_for_commit; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 986 | struct block_device *__bdev; |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 987 | struct super_block *sb; |
Chris Mason | d98237b | 2007-03-28 13:57:48 -0400 | [diff] [blame] | 988 | struct inode *btree_inode; |
Chris Mason | 0416008 | 2008-03-26 10:28:07 -0400 | [diff] [blame] | 989 | struct backing_dev_info bdi; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 990 | struct mutex tree_log_mutex; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 991 | struct mutex transaction_kthread_mutex; |
| 992 | struct mutex cleaner_mutex; |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 993 | struct mutex chunk_mutex; |
Chris Mason | 7d9eb12 | 2008-07-08 14:19:17 -0400 | [diff] [blame] | 994 | struct mutex volume_mutex; |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 995 | /* |
| 996 | * this protects the ordered operations list only while we are |
| 997 | * processing all of the entries on it. This way we make |
| 998 | * sure the commit code doesn't find the list temporarily empty |
| 999 | * because another function happens to be doing non-waiting preflush |
| 1000 | * before jumping into the main commit. |
| 1001 | */ |
| 1002 | struct mutex ordered_operations_mutex; |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 1003 | struct rw_semaphore extent_commit_sem; |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 1004 | |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 1005 | struct rw_semaphore cleanup_work_sem; |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1006 | |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 1007 | struct rw_semaphore subvol_sem; |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 1008 | struct srcu_struct subvol_srcu; |
| 1009 | |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1010 | spinlock_t trans_lock; |
Chris Mason | 7585717 | 2011-06-13 20:00:16 -0400 | [diff] [blame] | 1011 | /* |
| 1012 | * the reloc mutex goes with the trans lock, it is taken |
| 1013 | * during commit to protect us from the relocation code |
| 1014 | */ |
| 1015 | struct mutex reloc_mutex; |
| 1016 | |
Chris Mason | 8fd1779 | 2007-04-19 21:01:03 -0400 | [diff] [blame] | 1017 | struct list_head trans_list; |
Chris Mason | 19c00dd | 2007-10-15 16:19:22 -0400 | [diff] [blame] | 1018 | struct list_head hashers; |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 1019 | struct list_head dead_roots; |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 1020 | struct list_head caching_block_groups; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1021 | |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 1022 | spinlock_t delayed_iput_lock; |
| 1023 | struct list_head delayed_iputs; |
| 1024 | |
Chris Mason | cb03c74 | 2008-05-15 16:15:45 -0400 | [diff] [blame] | 1025 | atomic_t nr_async_submits; |
Chris Mason | 8c8bee1 | 2008-09-29 11:19:10 -0400 | [diff] [blame] | 1026 | atomic_t async_submit_draining; |
Chris Mason | 0986fe9e | 2008-08-15 15:34:15 -0400 | [diff] [blame] | 1027 | atomic_t nr_async_bios; |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 1028 | atomic_t async_delalloc_pages; |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1029 | atomic_t open_ioctl_trans; |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 1030 | |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1031 | /* |
Chris Mason | 3eaa288 | 2008-07-24 11:57:52 -0400 | [diff] [blame] | 1032 | * this is used by the balancing code to wait for all the pending |
| 1033 | * ordered extents |
| 1034 | */ |
| 1035 | spinlock_t ordered_extent_lock; |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 1036 | |
| 1037 | /* |
| 1038 | * all of the data=ordered extents pending writeback |
| 1039 | * these can span multiple transactions and basically include |
| 1040 | * every dirty data page that isn't from nodatacow |
| 1041 | */ |
Chris Mason | 3eaa288 | 2008-07-24 11:57:52 -0400 | [diff] [blame] | 1042 | struct list_head ordered_extents; |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 1043 | |
| 1044 | /* |
| 1045 | * all of the inodes that have delalloc bytes. It is possible for |
| 1046 | * this list to be empty even when there is still dirty data=ordered |
| 1047 | * extents waiting to finish IO. |
| 1048 | */ |
Chris Mason | ea8c281 | 2008-08-04 23:17:27 -0400 | [diff] [blame] | 1049 | struct list_head delalloc_inodes; |
Chris Mason | 3eaa288 | 2008-07-24 11:57:52 -0400 | [diff] [blame] | 1050 | |
| 1051 | /* |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 1052 | * special rename and truncate targets that must be on disk before |
| 1053 | * we're allowed to commit. This is basically the ext3 style |
| 1054 | * data=ordered list. |
| 1055 | */ |
| 1056 | struct list_head ordered_operations; |
| 1057 | |
| 1058 | /* |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1059 | * there is a pool of worker threads for checksumming during writes |
| 1060 | * and a pool for checksumming after reads. This is because readers |
| 1061 | * can run with FS locks held, and the writers may be waiting for |
| 1062 | * those locks. We don't want ordering in the pending list to cause |
| 1063 | * deadlocks, and so the two are serviced separately. |
Chris Mason | 1cc127b | 2008-06-12 14:46:17 -0400 | [diff] [blame] | 1064 | * |
| 1065 | * A third pool does submit_bio to avoid deadlocking with the other |
| 1066 | * two |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1067 | */ |
Chris Mason | 61d92c3 | 2009-10-02 19:11:56 -0400 | [diff] [blame] | 1068 | struct btrfs_workers generic_worker; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1069 | struct btrfs_workers workers; |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 1070 | struct btrfs_workers delalloc_workers; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1071 | struct btrfs_workers endio_workers; |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 1072 | struct btrfs_workers endio_meta_workers; |
Chris Mason | cad321a | 2008-12-17 14:51:42 -0500 | [diff] [blame] | 1073 | struct btrfs_workers endio_meta_write_workers; |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 1074 | struct btrfs_workers endio_write_workers; |
Josef Bacik | 0cb59c9 | 2010-07-02 12:14:14 -0400 | [diff] [blame] | 1075 | struct btrfs_workers endio_freespace_worker; |
Chris Mason | 1cc127b | 2008-06-12 14:46:17 -0400 | [diff] [blame] | 1076 | struct btrfs_workers submit_workers; |
Josef Bacik | bab39bf | 2011-06-30 14:42:28 -0400 | [diff] [blame] | 1077 | struct btrfs_workers caching_workers; |
Arne Jansen | 90519d6 | 2011-05-23 14:30:00 +0200 | [diff] [blame] | 1078 | struct btrfs_workers readahead_workers; |
Josef Bacik | bab39bf | 2011-06-30 14:42:28 -0400 | [diff] [blame] | 1079 | |
Chris Mason | 247e743 | 2008-07-17 12:53:51 -0400 | [diff] [blame] | 1080 | /* |
| 1081 | * fixup workers take dirty pages that didn't properly go through |
| 1082 | * the cow mechanism and make them safe to write. It happens |
| 1083 | * for the sys_munmap function call path |
| 1084 | */ |
| 1085 | struct btrfs_workers fixup_workers; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 1086 | struct btrfs_workers delayed_workers; |
Chris Mason | a74a4b9 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1087 | struct task_struct *transaction_kthread; |
| 1088 | struct task_struct *cleaner_kthread; |
Chris Mason | 4543df7 | 2008-06-11 21:47:56 -0400 | [diff] [blame] | 1089 | int thread_pool_size; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 1090 | |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1091 | struct kobject super_kobj; |
| 1092 | struct completion kobj_unregister; |
Chris Mason | e66f709 | 2007-04-20 13:16:02 -0400 | [diff] [blame] | 1093 | int do_barriers; |
Chris Mason | facda1e | 2007-06-08 18:11:48 -0400 | [diff] [blame] | 1094 | int closing; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1095 | int log_root_recovering; |
Yan, Zheng | a22285a | 2010-05-16 10:48:46 -0400 | [diff] [blame] | 1096 | int enospc_unlink; |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 1097 | int trans_no_join; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 1098 | |
Yan | 324ae4d | 2007-11-16 14:57:08 -0500 | [diff] [blame] | 1099 | u64 total_pinned; |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 1100 | |
| 1101 | /* protected by the delalloc lock, used to keep from writing |
| 1102 | * metadata until there is a nice batch |
| 1103 | */ |
| 1104 | u64 dirty_metadata_bytes; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1105 | struct list_head dirty_cowonly_roots; |
| 1106 | |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 1107 | struct btrfs_fs_devices *fs_devices; |
Chris Mason | 4184ea7 | 2009-03-10 12:39:20 -0400 | [diff] [blame] | 1108 | |
| 1109 | /* |
| 1110 | * the space_info list is almost entirely read only. It only changes |
| 1111 | * when we add a new raid type to the FS, and that happens |
| 1112 | * very rarely. RCU is used to protect it. |
| 1113 | */ |
Chris Mason | 6324fbf | 2008-03-24 15:01:59 -0400 | [diff] [blame] | 1114 | struct list_head space_info; |
Chris Mason | 4184ea7 | 2009-03-10 12:39:20 -0400 | [diff] [blame] | 1115 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1116 | struct reloc_control *reloc_ctl; |
| 1117 | |
Chris Mason | 1832a6d | 2007-12-21 16:27:21 -0500 | [diff] [blame] | 1118 | spinlock_t delalloc_lock; |
| 1119 | u64 delalloc_bytes; |
Chris Mason | fa9c0d79 | 2009-04-03 09:47:43 -0400 | [diff] [blame] | 1120 | |
| 1121 | /* data_alloc_cluster is only used in ssd mode */ |
| 1122 | struct btrfs_free_cluster data_alloc_cluster; |
| 1123 | |
| 1124 | /* all metadata allocations go through this cluster */ |
| 1125 | struct btrfs_free_cluster meta_alloc_cluster; |
Chris Mason | d18a2c4 | 2008-04-04 15:40:00 -0400 | [diff] [blame] | 1126 | |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 1127 | /* auto defrag inodes go here */ |
| 1128 | spinlock_t defrag_inodes_lock; |
| 1129 | struct rb_root defrag_inodes; |
| 1130 | atomic_t defrag_running; |
| 1131 | |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 1132 | spinlock_t ref_cache_lock; |
| 1133 | u64 total_ref_cache_size; |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 1134 | |
Chris Mason | d18a2c4 | 2008-04-04 15:40:00 -0400 | [diff] [blame] | 1135 | u64 avail_data_alloc_bits; |
| 1136 | u64 avail_metadata_alloc_bits; |
| 1137 | u64 avail_system_alloc_bits; |
| 1138 | u64 data_alloc_profile; |
| 1139 | u64 metadata_alloc_profile; |
| 1140 | u64 system_alloc_profile; |
Chris Mason | 788f20e | 2008-04-28 15:29:42 -0400 | [diff] [blame] | 1141 | |
Josef Bacik | 97e728d | 2009-04-21 17:40:57 -0400 | [diff] [blame] | 1142 | unsigned data_chunk_allocations; |
| 1143 | unsigned metadata_ratio; |
| 1144 | |
Chris Mason | 788f20e | 2008-04-28 15:29:42 -0400 | [diff] [blame] | 1145 | void *bdev_holder; |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 1146 | |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 1147 | /* private scrub information */ |
| 1148 | struct mutex scrub_lock; |
| 1149 | atomic_t scrubs_running; |
| 1150 | atomic_t scrub_pause_req; |
| 1151 | atomic_t scrubs_paused; |
| 1152 | atomic_t scrub_cancel_req; |
| 1153 | wait_queue_head_t scrub_pause_wait; |
| 1154 | struct rw_semaphore scrub_super_lock; |
| 1155 | int scrub_workers_refcnt; |
| 1156 | struct btrfs_workers scrub_workers; |
| 1157 | |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 1158 | /* filesystem state */ |
| 1159 | u64 fs_state; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 1160 | |
| 1161 | struct btrfs_delayed_root *delayed_root; |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1162 | |
Arne Jansen | 90519d6 | 2011-05-23 14:30:00 +0200 | [diff] [blame] | 1163 | /* readahead tree */ |
| 1164 | spinlock_t reada_lock; |
| 1165 | struct radix_tree_root reada_tree; |
Chris Mason | 531f4b1a | 2011-11-06 03:05:08 -0500 | [diff] [blame] | 1166 | |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1167 | /* next backup root to be overwritten */ |
| 1168 | int backup_root_index; |
Yan | 324ae4d | 2007-11-16 14:57:08 -0500 | [diff] [blame] | 1169 | }; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1170 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 1171 | /* |
| 1172 | * 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] | 1173 | * and for the extent tree extent_root root. |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 1174 | */ |
| 1175 | struct btrfs_root { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1176 | struct extent_buffer *node; |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1177 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1178 | struct extent_buffer *commit_root; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1179 | struct btrfs_root *log_root; |
Zheng Yan | 1a40e23 | 2008-09-26 10:09:34 -0400 | [diff] [blame] | 1180 | struct btrfs_root *reloc_root; |
Yan Zheng | 31153d8 | 2008-07-28 15:32:19 -0400 | [diff] [blame] | 1181 | |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 1182 | struct btrfs_root_item root_item; |
| 1183 | struct btrfs_key root_key; |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 1184 | struct btrfs_fs_info *fs_info; |
Chris Mason | d0c803c | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 1185 | struct extent_io_tree dirty_log_pages; |
| 1186 | |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1187 | struct kobject root_kobj; |
| 1188 | struct completion kobj_unregister; |
Chris Mason | a213501 | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 1189 | struct mutex objectid_mutex; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1190 | |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 1191 | spinlock_t accounting_lock; |
| 1192 | struct btrfs_block_rsv *block_rsv; |
| 1193 | |
Li Zefan | 581bb05 | 2011-04-20 10:06:11 +0800 | [diff] [blame] | 1194 | /* free ino cache stuff */ |
| 1195 | struct mutex fs_commit_mutex; |
| 1196 | struct btrfs_free_space_ctl *free_ino_ctl; |
| 1197 | enum btrfs_caching_type cached; |
| 1198 | spinlock_t cache_lock; |
| 1199 | wait_queue_head_t cache_wait; |
| 1200 | struct btrfs_free_space_ctl *free_ino_pinned; |
| 1201 | u64 cache_progress; |
Li Zefan | 82d5902 | 2011-04-20 10:33:24 +0800 | [diff] [blame] | 1202 | struct inode *cache_inode; |
Li Zefan | 581bb05 | 2011-04-20 10:06:11 +0800 | [diff] [blame] | 1203 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1204 | struct mutex log_mutex; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1205 | wait_queue_head_t log_writer_wait; |
| 1206 | wait_queue_head_t log_commit_wait[2]; |
| 1207 | atomic_t log_writers; |
| 1208 | atomic_t log_commit[2]; |
| 1209 | unsigned long log_transid; |
Chris Mason | 257c62e | 2009-10-13 13:21:08 -0400 | [diff] [blame] | 1210 | unsigned long last_log_commit; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 1211 | unsigned long log_batch; |
Josef Bacik | ff782e0 | 2009-10-08 15:30:04 -0400 | [diff] [blame] | 1212 | pid_t log_start_pid; |
| 1213 | bool log_multiple_pids; |
Chris Mason | ea8c281 | 2008-08-04 23:17:27 -0400 | [diff] [blame] | 1214 | |
Chris Mason | 0f7d52f | 2007-04-09 10:42:37 -0400 | [diff] [blame] | 1215 | u64 objectid; |
| 1216 | u64 last_trans; |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1217 | |
| 1218 | /* data allocations are done in sectorsize units */ |
| 1219 | u32 sectorsize; |
| 1220 | |
| 1221 | /* node allocations are done in nodesize units */ |
| 1222 | u32 nodesize; |
| 1223 | |
| 1224 | /* leaf allocations are done in leafsize units */ |
| 1225 | u32 leafsize; |
| 1226 | |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 1227 | u32 stripesize; |
| 1228 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 1229 | u32 type; |
Yan, Zheng | 13a8a7c | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1230 | |
| 1231 | u64 highest_objectid; |
Chris Mason | 7585717 | 2011-06-13 20:00:16 -0400 | [diff] [blame] | 1232 | |
| 1233 | /* btrfs_record_root_in_trans is a multi-step process, |
| 1234 | * and it can race with the balancing code. But the |
| 1235 | * race is very small, and only the first time the root |
| 1236 | * is added to each transaction. So in_trans_setup |
| 1237 | * is used to tell us when more checks are required |
| 1238 | */ |
| 1239 | unsigned long in_trans_setup; |
Chris Mason | 9f3a742 | 2007-08-07 15:52:19 -0400 | [diff] [blame] | 1240 | int ref_cows; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1241 | int track_dirty; |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 1242 | int in_radix; |
| 1243 | |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 1244 | u64 defrag_trans_start; |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 1245 | struct btrfs_key defrag_progress; |
Chris Mason | 0ef3e66 | 2008-05-24 14:04:53 -0400 | [diff] [blame] | 1246 | struct btrfs_key defrag_max; |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 1247 | int defrag_running; |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 1248 | char *name; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1249 | |
| 1250 | /* the dirty list is only used by non-reference counted roots */ |
| 1251 | struct list_head dirty_list; |
Josef Bacik | 7b12876 | 2008-07-24 12:17:14 -0400 | [diff] [blame] | 1252 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1253 | struct list_head root_list; |
| 1254 | |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1255 | spinlock_t orphan_lock; |
Josef Bacik | 7b12876 | 2008-07-24 12:17:14 -0400 | [diff] [blame] | 1256 | struct list_head orphan_list; |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 1257 | struct btrfs_block_rsv *orphan_block_rsv; |
| 1258 | int orphan_item_inserted; |
| 1259 | int orphan_cleanup_state; |
Chris Mason | 3394e16 | 2008-11-17 20:42:26 -0500 | [diff] [blame] | 1260 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1261 | spinlock_t inode_lock; |
| 1262 | /* red-black tree that keeps track of in-memory inodes */ |
| 1263 | struct rb_root inode_tree; |
| 1264 | |
Chris Mason | 3394e16 | 2008-11-17 20:42:26 -0500 | [diff] [blame] | 1265 | /* |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 1266 | * radix tree that keeps track of delayed nodes of every inode, |
| 1267 | * protected by inode_lock |
| 1268 | */ |
| 1269 | struct radix_tree_root delayed_nodes_tree; |
| 1270 | /* |
Chris Mason | 3394e16 | 2008-11-17 20:42:26 -0500 | [diff] [blame] | 1271 | * right now this just gets used so that a root has its own devid |
| 1272 | * for stat. It may be used for more later |
| 1273 | */ |
Al Viro | 0ee5dc6 | 2011-07-07 15:44:25 -0400 | [diff] [blame] | 1274 | dev_t anon_dev; |
Liu Bo | f1ebcc7 | 2011-11-14 20:48:06 -0500 | [diff] [blame] | 1275 | |
| 1276 | int force_cow; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame] | 1277 | }; |
| 1278 | |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 1279 | struct btrfs_ioctl_defrag_range_args { |
| 1280 | /* start of the defrag operation */ |
| 1281 | __u64 start; |
| 1282 | |
| 1283 | /* number of bytes to defrag, use (u64)-1 to say all */ |
| 1284 | __u64 len; |
| 1285 | |
| 1286 | /* |
| 1287 | * flags for the operation, which can include turning |
| 1288 | * on compression for this one defrag |
| 1289 | */ |
| 1290 | __u64 flags; |
| 1291 | |
| 1292 | /* |
| 1293 | * any extent bigger than this will be considered |
| 1294 | * already defragged. Use 0 to take the kernel default |
| 1295 | * Use 1 to say every single extent must be rewritten |
| 1296 | */ |
| 1297 | __u32 extent_thresh; |
| 1298 | |
| 1299 | /* |
| 1300 | * which compression method to use if turning on compression |
| 1301 | * for this defrag operation. If unspecified, zlib will |
| 1302 | * be used |
| 1303 | */ |
| 1304 | __u32 compress_type; |
| 1305 | |
| 1306 | /* spare for later */ |
| 1307 | __u32 unused[4]; |
| 1308 | }; |
| 1309 | |
| 1310 | |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1311 | /* |
| 1312 | * inode items have the data typically returned from stat and store other |
| 1313 | * info about object characteristics. There is one for every file and dir in |
| 1314 | * the FS |
| 1315 | */ |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 1316 | #define BTRFS_INODE_ITEM_KEY 1 |
Chris Mason | 0660b5a | 2008-11-17 20:37:39 -0500 | [diff] [blame] | 1317 | #define BTRFS_INODE_REF_KEY 12 |
| 1318 | #define BTRFS_XATTR_ITEM_KEY 24 |
| 1319 | #define BTRFS_ORPHAN_ITEM_KEY 48 |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 1320 | /* reserve 2-15 close to the inode for later flexibility */ |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1321 | |
| 1322 | /* |
| 1323 | * dir items are the name -> inode pointers in a directory. There is one |
| 1324 | * for every name in a directory. |
| 1325 | */ |
Chris Mason | 0660b5a | 2008-11-17 20:37:39 -0500 | [diff] [blame] | 1326 | #define BTRFS_DIR_LOG_ITEM_KEY 60 |
| 1327 | #define BTRFS_DIR_LOG_INDEX_KEY 72 |
| 1328 | #define BTRFS_DIR_ITEM_KEY 84 |
| 1329 | #define BTRFS_DIR_INDEX_KEY 96 |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1330 | /* |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 1331 | * extent data is for file data |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1332 | */ |
Chris Mason | 0660b5a | 2008-11-17 20:37:39 -0500 | [diff] [blame] | 1333 | #define BTRFS_EXTENT_DATA_KEY 108 |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 1334 | |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1335 | /* |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 1336 | * extent csums are stored in a separate tree and hold csums for |
| 1337 | * an entire extent on disk. |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 1338 | */ |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 1339 | #define BTRFS_EXTENT_CSUM_KEY 128 |
Chris Mason | f254e52 | 2007-03-29 15:15:27 -0400 | [diff] [blame] | 1340 | |
| 1341 | /* |
Wu Fengguang | d4a7894 | 2009-04-02 16:46:06 -0400 | [diff] [blame] | 1342 | * root items point to tree roots. They are typically in the root |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1343 | * tree used by the super block to find all the other trees |
| 1344 | */ |
Chris Mason | 0660b5a | 2008-11-17 20:37:39 -0500 | [diff] [blame] | 1345 | #define BTRFS_ROOT_ITEM_KEY 132 |
| 1346 | |
| 1347 | /* |
| 1348 | * root backrefs tie subvols and snapshots to the directory entries that |
| 1349 | * reference them |
| 1350 | */ |
| 1351 | #define BTRFS_ROOT_BACKREF_KEY 144 |
| 1352 | |
| 1353 | /* |
| 1354 | * root refs make a fast index for listing all of the snapshots and |
| 1355 | * subvolumes referenced by a given root. They point directly to the |
| 1356 | * directory item in the root that references the subvol |
| 1357 | */ |
| 1358 | #define BTRFS_ROOT_REF_KEY 156 |
| 1359 | |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1360 | /* |
| 1361 | * extent items are in the extent map tree. These record which blocks |
| 1362 | * are used, and how many references there are to each block |
| 1363 | */ |
Chris Mason | 0660b5a | 2008-11-17 20:37:39 -0500 | [diff] [blame] | 1364 | #define BTRFS_EXTENT_ITEM_KEY 168 |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1365 | |
| 1366 | #define BTRFS_TREE_BLOCK_REF_KEY 176 |
| 1367 | |
| 1368 | #define BTRFS_EXTENT_DATA_REF_KEY 178 |
| 1369 | |
| 1370 | #define BTRFS_EXTENT_REF_V0_KEY 180 |
| 1371 | |
| 1372 | #define BTRFS_SHARED_BLOCK_REF_KEY 182 |
| 1373 | |
| 1374 | #define BTRFS_SHARED_DATA_REF_KEY 184 |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 1375 | |
| 1376 | /* |
| 1377 | * block groups give us hints into the extent allocation trees. Which |
| 1378 | * blocks are free etc etc |
| 1379 | */ |
Chris Mason | 0660b5a | 2008-11-17 20:37:39 -0500 | [diff] [blame] | 1380 | #define BTRFS_BLOCK_GROUP_ITEM_KEY 192 |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 1381 | |
Chris Mason | 0660b5a | 2008-11-17 20:37:39 -0500 | [diff] [blame] | 1382 | #define BTRFS_DEV_EXTENT_KEY 204 |
| 1383 | #define BTRFS_DEV_ITEM_KEY 216 |
| 1384 | #define BTRFS_CHUNK_ITEM_KEY 228 |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1385 | |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 1386 | /* |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1387 | * string items are for debugging. They just store a short string of |
| 1388 | * data in the FS |
| 1389 | */ |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 1390 | #define BTRFS_STRING_ITEM_KEY 253 |
| 1391 | |
David Sterba | 0942caa | 2011-06-28 15:10:37 +0000 | [diff] [blame] | 1392 | /* |
| 1393 | * Flags for mount options. |
| 1394 | * |
| 1395 | * Note: don't forget to add new options to btrfs_show_options() |
| 1396 | */ |
Chris Mason | 21ad10c | 2008-01-09 09:23:21 -0500 | [diff] [blame] | 1397 | #define BTRFS_MOUNT_NODATASUM (1 << 0) |
| 1398 | #define BTRFS_MOUNT_NODATACOW (1 << 1) |
| 1399 | #define BTRFS_MOUNT_NOBARRIER (1 << 2) |
Chris Mason | e18e480 | 2008-01-18 10:54:22 -0500 | [diff] [blame] | 1400 | #define BTRFS_MOUNT_SSD (1 << 3) |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 1401 | #define BTRFS_MOUNT_DEGRADED (1 << 4) |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 1402 | #define BTRFS_MOUNT_COMPRESS (1 << 5) |
Sage Weil | 3a5e140 | 2009-04-02 16:49:40 -0400 | [diff] [blame] | 1403 | #define BTRFS_MOUNT_NOTREELOG (1 << 6) |
Sage Weil | dccae99 | 2009-04-02 16:59:01 -0400 | [diff] [blame] | 1404 | #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) |
Chris Mason | 451d758 | 2009-06-09 20:28:34 -0400 | [diff] [blame] | 1405 | #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) |
Chris Mason | c289811 | 2009-06-10 09:51:32 -0400 | [diff] [blame] | 1406 | #define BTRFS_MOUNT_NOSSD (1 << 9) |
Christoph Hellwig | e244a0a | 2009-10-14 09:24:59 -0400 | [diff] [blame] | 1407 | #define BTRFS_MOUNT_DISCARD (1 << 10) |
Chris Mason | a555f81 | 2010-01-28 16:18:15 -0500 | [diff] [blame] | 1408 | #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 1409 | #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) |
Josef Bacik | 88c2ba3 | 2010-09-21 14:21:34 -0400 | [diff] [blame] | 1410 | #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) |
Sage Weil | 4260f7c | 2010-10-29 15:46:43 -0400 | [diff] [blame] | 1411 | #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) |
Chris Mason | 9143565 | 2011-02-16 13:10:41 -0500 | [diff] [blame] | 1412 | #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 1413 | #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) |
Chris Mason | 4b9465c | 2011-06-03 09:36:29 -0400 | [diff] [blame] | 1414 | #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 1415 | #define BTRFS_MOUNT_RECOVERY (1 << 18) |
Chris Mason | b6cda9b | 2007-12-14 15:30:32 -0500 | [diff] [blame] | 1416 | |
| 1417 | #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) |
| 1418 | #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) |
| 1419 | #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ |
| 1420 | BTRFS_MOUNT_##opt) |
Yan | b98b676 | 2008-01-08 15:54:37 -0500 | [diff] [blame] | 1421 | /* |
| 1422 | * Inode flags |
| 1423 | */ |
Yan | fdebe2b | 2008-01-14 13:26:08 -0500 | [diff] [blame] | 1424 | #define BTRFS_INODE_NODATASUM (1 << 0) |
| 1425 | #define BTRFS_INODE_NODATACOW (1 << 1) |
| 1426 | #define BTRFS_INODE_READONLY (1 << 2) |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 1427 | #define BTRFS_INODE_NOCOMPRESS (1 << 3) |
Yan Zheng | d899e05 | 2008-10-30 14:25:28 -0400 | [diff] [blame] | 1428 | #define BTRFS_INODE_PREALLOC (1 << 4) |
Christoph Hellwig | 6cbff00 | 2009-04-17 10:37:41 +0200 | [diff] [blame] | 1429 | #define BTRFS_INODE_SYNC (1 << 5) |
| 1430 | #define BTRFS_INODE_IMMUTABLE (1 << 6) |
| 1431 | #define BTRFS_INODE_APPEND (1 << 7) |
| 1432 | #define BTRFS_INODE_NODUMP (1 << 8) |
| 1433 | #define BTRFS_INODE_NOATIME (1 << 9) |
| 1434 | #define BTRFS_INODE_DIRSYNC (1 << 10) |
Liu Bo | 75e7cb7 | 2011-03-22 10:12:20 +0000 | [diff] [blame] | 1435 | #define BTRFS_INODE_COMPRESS (1 << 11) |
Christoph Hellwig | 6cbff00 | 2009-04-17 10:37:41 +0200 | [diff] [blame] | 1436 | |
Li Zefan | 08fe4db | 2011-03-28 02:01:25 +0000 | [diff] [blame] | 1437 | #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) |
| 1438 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1439 | /* some macros to generate set/get funcs for the struct fields. This |
| 1440 | * assumes there is a lefoo_to_cpu for every type, so lets make a simple |
| 1441 | * one for u8: |
| 1442 | */ |
| 1443 | #define le8_to_cpu(v) (v) |
| 1444 | #define cpu_to_le8(v) (v) |
| 1445 | #define __le8 u8 |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 1446 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1447 | #define read_eb_member(eb, ptr, type, member, result) ( \ |
| 1448 | read_extent_buffer(eb, (char *)(result), \ |
| 1449 | ((unsigned long)(ptr)) + \ |
| 1450 | offsetof(type, member), \ |
| 1451 | sizeof(((type *)0)->member))) |
| 1452 | |
| 1453 | #define write_eb_member(eb, ptr, type, member, result) ( \ |
| 1454 | write_extent_buffer(eb, (char *)(result), \ |
| 1455 | ((unsigned long)(ptr)) + \ |
| 1456 | offsetof(type, member), \ |
| 1457 | sizeof(((type *)0)->member))) |
| 1458 | |
Chris Mason | 0f82731 | 2007-10-15 16:18:56 -0400 | [diff] [blame] | 1459 | #ifndef BTRFS_SETGET_FUNCS |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1460 | #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ |
Chris Mason | 0f82731 | 2007-10-15 16:18:56 -0400 | [diff] [blame] | 1461 | u##bits btrfs_##name(struct extent_buffer *eb, type *s); \ |
| 1462 | void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); |
| 1463 | #endif |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 1464 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1465 | #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ |
| 1466 | static inline u##bits btrfs_##name(struct extent_buffer *eb) \ |
| 1467 | { \ |
Li Zefan | c97c291 | 2011-08-03 08:11:41 +0000 | [diff] [blame] | 1468 | type *p = page_address(eb->first_page); \ |
David Miller | df68b8a | 2008-02-15 10:40:52 -0500 | [diff] [blame] | 1469 | u##bits res = le##bits##_to_cpu(p->member); \ |
Chris Mason | 810191f | 2007-10-15 16:18:55 -0400 | [diff] [blame] | 1470 | return res; \ |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1471 | } \ |
| 1472 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ |
| 1473 | u##bits val) \ |
| 1474 | { \ |
Li Zefan | c97c291 | 2011-08-03 08:11:41 +0000 | [diff] [blame] | 1475 | type *p = page_address(eb->first_page); \ |
David Miller | df68b8a | 2008-02-15 10:40:52 -0500 | [diff] [blame] | 1476 | p->member = cpu_to_le##bits(val); \ |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 1477 | } |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1478 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1479 | #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ |
| 1480 | static inline u##bits btrfs_##name(type *s) \ |
| 1481 | { \ |
| 1482 | return le##bits##_to_cpu(s->member); \ |
| 1483 | } \ |
| 1484 | static inline void btrfs_set_##name(type *s, u##bits val) \ |
| 1485 | { \ |
| 1486 | s->member = cpu_to_le##bits(val); \ |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1487 | } |
| 1488 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1489 | BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); |
| 1490 | BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); |
| 1491 | BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); |
| 1492 | BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); |
| 1493 | 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] | 1494 | BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, |
| 1495 | start_offset, 64); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1496 | BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); |
| 1497 | BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 1498 | BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); |
| 1499 | BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); |
| 1500 | BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 1501 | BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1502 | |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 1503 | BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); |
| 1504 | BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, |
| 1505 | total_bytes, 64); |
| 1506 | BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, |
| 1507 | bytes_used, 64); |
| 1508 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, |
| 1509 | io_align, 32); |
| 1510 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, |
| 1511 | io_width, 32); |
| 1512 | BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, |
| 1513 | sector_size, 32); |
| 1514 | 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] | 1515 | BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, |
| 1516 | dev_group, 32); |
| 1517 | BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, |
| 1518 | seek_speed, 8); |
| 1519 | BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, |
| 1520 | bandwidth, 8); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 1521 | BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, |
| 1522 | generation, 64); |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 1523 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1524 | static inline char *btrfs_device_uuid(struct btrfs_dev_item *d) |
| 1525 | { |
| 1526 | return (char *)d + offsetof(struct btrfs_dev_item, uuid); |
| 1527 | } |
| 1528 | |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 1529 | static inline char *btrfs_device_fsid(struct btrfs_dev_item *d) |
| 1530 | { |
| 1531 | return (char *)d + offsetof(struct btrfs_dev_item, fsid); |
| 1532 | } |
| 1533 | |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 1534 | BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1535 | BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); |
| 1536 | BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); |
| 1537 | BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); |
| 1538 | BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); |
| 1539 | BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); |
| 1540 | BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); |
| 1541 | BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); |
Chris Mason | 321aecc | 2008-04-16 10:49:51 -0400 | [diff] [blame] | 1542 | BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1543 | BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); |
| 1544 | BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); |
| 1545 | |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 1546 | static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) |
| 1547 | { |
| 1548 | return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); |
| 1549 | } |
| 1550 | |
| 1551 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1552 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); |
| 1553 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, |
| 1554 | stripe_len, 64); |
| 1555 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, |
| 1556 | io_align, 32); |
| 1557 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, |
| 1558 | io_width, 32); |
| 1559 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, |
| 1560 | sector_size, 32); |
| 1561 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); |
| 1562 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, |
| 1563 | num_stripes, 16); |
Chris Mason | 321aecc | 2008-04-16 10:49:51 -0400 | [diff] [blame] | 1564 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, |
| 1565 | sub_stripes, 16); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1566 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); |
| 1567 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); |
| 1568 | |
| 1569 | static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, |
| 1570 | int nr) |
| 1571 | { |
| 1572 | unsigned long offset = (unsigned long)c; |
| 1573 | offset += offsetof(struct btrfs_chunk, stripe); |
| 1574 | offset += nr * sizeof(struct btrfs_stripe); |
| 1575 | return (struct btrfs_stripe *)offset; |
| 1576 | } |
| 1577 | |
Chris Mason | a443755 | 2008-04-18 10:29:38 -0400 | [diff] [blame] | 1578 | static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) |
| 1579 | { |
| 1580 | return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); |
| 1581 | } |
| 1582 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1583 | static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, |
| 1584 | struct btrfs_chunk *c, int nr) |
| 1585 | { |
| 1586 | return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); |
| 1587 | } |
| 1588 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1589 | static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, |
| 1590 | struct btrfs_chunk *c, int nr) |
| 1591 | { |
| 1592 | return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); |
| 1593 | } |
| 1594 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1595 | /* struct btrfs_block_group_item */ |
| 1596 | BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, |
| 1597 | used, 64); |
| 1598 | BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, |
| 1599 | used, 64); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1600 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, |
| 1601 | struct btrfs_block_group_item, chunk_objectid, 64); |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 1602 | |
| 1603 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1604 | struct btrfs_block_group_item, chunk_objectid, 64); |
| 1605 | BTRFS_SETGET_FUNCS(disk_block_group_flags, |
| 1606 | struct btrfs_block_group_item, flags, 64); |
| 1607 | BTRFS_SETGET_STACK_FUNCS(block_group_flags, |
| 1608 | struct btrfs_block_group_item, flags, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1609 | |
Chris Mason | 3954401 | 2007-12-12 14:38:19 -0500 | [diff] [blame] | 1610 | /* struct btrfs_inode_ref */ |
| 1611 | 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] | 1612 | BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); |
Chris Mason | 3954401 | 2007-12-12 14:38:19 -0500 | [diff] [blame] | 1613 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1614 | /* struct btrfs_inode_item */ |
| 1615 | BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); |
Chris Mason | c3027eb | 2008-12-08 16:40:21 -0500 | [diff] [blame] | 1616 | BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1617 | BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1618 | BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); |
Yan Zheng | a76a3cd | 2008-10-09 11:46:29 -0400 | [diff] [blame] | 1619 | BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1620 | BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); |
| 1621 | BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); |
| 1622 | BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); |
| 1623 | BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); |
| 1624 | BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1625 | BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 1626 | BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1627 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1628 | static inline struct btrfs_timespec * |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1629 | btrfs_inode_atime(struct btrfs_inode_item *inode_item) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1630 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1631 | unsigned long ptr = (unsigned long)inode_item; |
| 1632 | ptr += offsetof(struct btrfs_inode_item, atime); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1633 | return (struct btrfs_timespec *)ptr; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1634 | } |
| 1635 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1636 | static inline struct btrfs_timespec * |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1637 | btrfs_inode_mtime(struct btrfs_inode_item *inode_item) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1638 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1639 | unsigned long ptr = (unsigned long)inode_item; |
| 1640 | ptr += offsetof(struct btrfs_inode_item, mtime); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1641 | return (struct btrfs_timespec *)ptr; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1642 | } |
| 1643 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1644 | static inline struct btrfs_timespec * |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1645 | btrfs_inode_ctime(struct btrfs_inode_item *inode_item) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1646 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1647 | unsigned long ptr = (unsigned long)inode_item; |
| 1648 | ptr += offsetof(struct btrfs_inode_item, ctime); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1649 | return (struct btrfs_timespec *)ptr; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1650 | } |
| 1651 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1652 | BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); |
| 1653 | BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1654 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1655 | /* struct btrfs_dev_extent */ |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 1656 | BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, |
| 1657 | chunk_tree, 64); |
| 1658 | BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, |
| 1659 | chunk_objectid, 64); |
| 1660 | BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, |
| 1661 | chunk_offset, 64); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 1662 | BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); |
| 1663 | |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 1664 | static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) |
| 1665 | { |
| 1666 | unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); |
| 1667 | return (u8 *)((unsigned long)dev + ptr); |
| 1668 | } |
| 1669 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1670 | BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); |
| 1671 | BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, |
| 1672 | generation, 64); |
| 1673 | BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); |
Chris Mason | 74493f7 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 1674 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1675 | 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] | 1676 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1677 | |
| 1678 | BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); |
| 1679 | |
| 1680 | static inline void btrfs_tree_block_key(struct extent_buffer *eb, |
| 1681 | struct btrfs_tree_block_info *item, |
| 1682 | struct btrfs_disk_key *key) |
| 1683 | { |
| 1684 | read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); |
| 1685 | } |
| 1686 | |
| 1687 | static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, |
| 1688 | struct btrfs_tree_block_info *item, |
| 1689 | struct btrfs_disk_key *key) |
| 1690 | { |
| 1691 | write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); |
| 1692 | } |
| 1693 | |
| 1694 | BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, |
| 1695 | root, 64); |
| 1696 | BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, |
| 1697 | objectid, 64); |
| 1698 | BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, |
| 1699 | offset, 64); |
| 1700 | BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, |
| 1701 | count, 32); |
| 1702 | |
| 1703 | BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, |
| 1704 | count, 32); |
| 1705 | |
| 1706 | BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, |
| 1707 | type, 8); |
| 1708 | BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, |
| 1709 | offset, 64); |
| 1710 | |
| 1711 | static inline u32 btrfs_extent_inline_ref_size(int type) |
| 1712 | { |
| 1713 | if (type == BTRFS_TREE_BLOCK_REF_KEY || |
| 1714 | type == BTRFS_SHARED_BLOCK_REF_KEY) |
| 1715 | return sizeof(struct btrfs_extent_inline_ref); |
| 1716 | if (type == BTRFS_SHARED_DATA_REF_KEY) |
| 1717 | return sizeof(struct btrfs_shared_data_ref) + |
| 1718 | sizeof(struct btrfs_extent_inline_ref); |
| 1719 | if (type == BTRFS_EXTENT_DATA_REF_KEY) |
| 1720 | return sizeof(struct btrfs_extent_data_ref) + |
| 1721 | offsetof(struct btrfs_extent_inline_ref, offset); |
| 1722 | BUG(); |
| 1723 | return 0; |
| 1724 | } |
| 1725 | |
| 1726 | BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); |
| 1727 | BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, |
| 1728 | generation, 64); |
| 1729 | BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); |
| 1730 | 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] | 1731 | |
| 1732 | /* struct btrfs_node */ |
| 1733 | BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); |
Chris Mason | 74493f7 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 1734 | BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1735 | |
| 1736 | static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1737 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1738 | unsigned long ptr; |
| 1739 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 1740 | sizeof(struct btrfs_key_ptr) * nr; |
| 1741 | return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1742 | } |
| 1743 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1744 | static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, |
| 1745 | int nr, u64 val) |
Chris Mason | 31f3c99 | 2007-04-30 15:25:45 -0400 | [diff] [blame] | 1746 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1747 | unsigned long ptr; |
| 1748 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 1749 | sizeof(struct btrfs_key_ptr) * nr; |
| 1750 | btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); |
Chris Mason | 31f3c99 | 2007-04-30 15:25:45 -0400 | [diff] [blame] | 1751 | } |
| 1752 | |
Chris Mason | 74493f7 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 1753 | static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) |
| 1754 | { |
| 1755 | unsigned long ptr; |
| 1756 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 1757 | sizeof(struct btrfs_key_ptr) * nr; |
| 1758 | return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); |
| 1759 | } |
| 1760 | |
| 1761 | static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, |
| 1762 | int nr, u64 val) |
| 1763 | { |
| 1764 | unsigned long ptr; |
| 1765 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 1766 | sizeof(struct btrfs_key_ptr) * nr; |
| 1767 | btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); |
| 1768 | } |
| 1769 | |
Chris Mason | 810191f | 2007-10-15 16:18:55 -0400 | [diff] [blame] | 1770 | static inline unsigned long btrfs_node_key_ptr_offset(int nr) |
Chris Mason | 31f3c99 | 2007-04-30 15:25:45 -0400 | [diff] [blame] | 1771 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1772 | return offsetof(struct btrfs_node, ptrs) + |
| 1773 | sizeof(struct btrfs_key_ptr) * nr; |
Chris Mason | 31f3c99 | 2007-04-30 15:25:45 -0400 | [diff] [blame] | 1774 | } |
| 1775 | |
Chris Mason | e644d02 | 2007-11-06 15:09:29 -0500 | [diff] [blame] | 1776 | void btrfs_node_key(struct extent_buffer *eb, |
| 1777 | struct btrfs_disk_key *disk_key, int nr); |
| 1778 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1779 | static inline void btrfs_set_node_key(struct extent_buffer *eb, |
| 1780 | struct btrfs_disk_key *disk_key, int nr) |
| 1781 | { |
| 1782 | unsigned long ptr; |
| 1783 | ptr = btrfs_node_key_ptr_offset(nr); |
| 1784 | write_eb_member(eb, (struct btrfs_key_ptr *)ptr, |
| 1785 | struct btrfs_key_ptr, key, disk_key); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1786 | } |
| 1787 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1788 | /* struct btrfs_item */ |
| 1789 | BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); |
| 1790 | BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); |
| 1791 | |
| 1792 | static inline unsigned long btrfs_item_nr_offset(int nr) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1793 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1794 | return offsetof(struct btrfs_leaf, items) + |
| 1795 | sizeof(struct btrfs_item) * nr; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1796 | } |
| 1797 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1798 | static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb, |
| 1799 | int nr) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1800 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1801 | return (struct btrfs_item *)btrfs_item_nr_offset(nr); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1802 | } |
| 1803 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1804 | static inline u32 btrfs_item_end(struct extent_buffer *eb, |
| 1805 | struct btrfs_item *item) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1806 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1807 | return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1808 | } |
| 1809 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1810 | 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] | 1811 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1812 | return btrfs_item_end(eb, btrfs_item_nr(eb, nr)); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1813 | } |
| 1814 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1815 | 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] | 1816 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1817 | return btrfs_item_offset(eb, btrfs_item_nr(eb, nr)); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1818 | } |
| 1819 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1820 | 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] | 1821 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1822 | return btrfs_item_size(eb, btrfs_item_nr(eb, nr)); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1823 | } |
| 1824 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1825 | static inline void btrfs_item_key(struct extent_buffer *eb, |
| 1826 | struct btrfs_disk_key *disk_key, int nr) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1827 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1828 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
| 1829 | read_eb_member(eb, item, struct btrfs_item, key, disk_key); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1830 | } |
| 1831 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1832 | static inline void btrfs_set_item_key(struct extent_buffer *eb, |
| 1833 | struct btrfs_disk_key *disk_key, int nr) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1834 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1835 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
| 1836 | write_eb_member(eb, item, struct btrfs_item, key, disk_key); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1837 | } |
| 1838 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1839 | BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); |
| 1840 | |
Chris Mason | 0660b5a | 2008-11-17 20:37:39 -0500 | [diff] [blame] | 1841 | /* |
| 1842 | * struct btrfs_root_ref |
| 1843 | */ |
| 1844 | BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); |
| 1845 | BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); |
| 1846 | BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); |
| 1847 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1848 | /* struct btrfs_dir_item */ |
Josef Bacik | 5103e94 | 2007-11-16 11:45:54 -0500 | [diff] [blame] | 1849 | 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] | 1850 | BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); |
| 1851 | 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] | 1852 | BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1853 | |
| 1854 | static inline void btrfs_dir_item_key(struct extent_buffer *eb, |
| 1855 | struct btrfs_dir_item *item, |
| 1856 | struct btrfs_disk_key *key) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1857 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1858 | read_eb_member(eb, item, struct btrfs_dir_item, location, key); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1859 | } |
| 1860 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1861 | static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, |
| 1862 | struct btrfs_dir_item *item, |
| 1863 | struct btrfs_disk_key *key) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1864 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1865 | write_eb_member(eb, item, struct btrfs_dir_item, location, key); |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 1866 | } |
| 1867 | |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 1868 | BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, |
| 1869 | num_entries, 64); |
| 1870 | BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, |
| 1871 | num_bitmaps, 64); |
| 1872 | BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, |
| 1873 | generation, 64); |
| 1874 | |
| 1875 | static inline void btrfs_free_space_key(struct extent_buffer *eb, |
| 1876 | struct btrfs_free_space_header *h, |
| 1877 | struct btrfs_disk_key *key) |
| 1878 | { |
| 1879 | read_eb_member(eb, h, struct btrfs_free_space_header, location, key); |
| 1880 | } |
| 1881 | |
| 1882 | static inline void btrfs_set_free_space_key(struct extent_buffer *eb, |
| 1883 | struct btrfs_free_space_header *h, |
| 1884 | struct btrfs_disk_key *key) |
| 1885 | { |
| 1886 | write_eb_member(eb, h, struct btrfs_free_space_header, location, key); |
| 1887 | } |
| 1888 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1889 | /* struct btrfs_disk_key */ |
| 1890 | BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, |
| 1891 | objectid, 64); |
| 1892 | BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); |
| 1893 | 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] | 1894 | |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1895 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
| 1896 | struct btrfs_disk_key *disk) |
| 1897 | { |
| 1898 | cpu->offset = le64_to_cpu(disk->offset); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1899 | cpu->type = disk->type; |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1900 | cpu->objectid = le64_to_cpu(disk->objectid); |
| 1901 | } |
| 1902 | |
| 1903 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, |
| 1904 | struct btrfs_key *cpu) |
| 1905 | { |
| 1906 | disk->offset = cpu_to_le64(cpu->offset); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1907 | disk->type = cpu->type; |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1908 | disk->objectid = cpu_to_le64(cpu->objectid); |
| 1909 | } |
| 1910 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1911 | static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, |
| 1912 | struct btrfs_key *key, int nr) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1913 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1914 | struct btrfs_disk_key disk_key; |
| 1915 | btrfs_node_key(eb, &disk_key, nr); |
| 1916 | btrfs_disk_key_to_cpu(key, &disk_key); |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1917 | } |
| 1918 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1919 | static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, |
| 1920 | struct btrfs_key *key, int nr) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1921 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1922 | struct btrfs_disk_key disk_key; |
| 1923 | btrfs_item_key(eb, &disk_key, nr); |
| 1924 | btrfs_disk_key_to_cpu(key, &disk_key); |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1925 | } |
| 1926 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1927 | static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, |
| 1928 | struct btrfs_dir_item *item, |
| 1929 | struct btrfs_key *key) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1930 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1931 | struct btrfs_disk_key disk_key; |
| 1932 | btrfs_dir_item_key(eb, item, &disk_key); |
| 1933 | btrfs_disk_key_to_cpu(key, &disk_key); |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1934 | } |
| 1935 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1936 | |
| 1937 | static inline u8 btrfs_key_type(struct btrfs_key *key) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1938 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1939 | return key->type; |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1940 | } |
| 1941 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1942 | 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] | 1943 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1944 | key->type = val; |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1945 | } |
| 1946 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1947 | /* struct btrfs_header */ |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 1948 | BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1949 | BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, |
| 1950 | generation, 64); |
| 1951 | BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); |
| 1952 | BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); |
Chris Mason | 63b10fc | 2008-04-01 11:21:32 -0400 | [diff] [blame] | 1953 | BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1954 | BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); |
| 1955 | |
Chris Mason | 63b10fc | 2008-04-01 11:21:32 -0400 | [diff] [blame] | 1956 | static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) |
| 1957 | { |
| 1958 | return (btrfs_header_flags(eb) & flag) == flag; |
| 1959 | } |
| 1960 | |
| 1961 | static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) |
| 1962 | { |
| 1963 | u64 flags = btrfs_header_flags(eb); |
| 1964 | btrfs_set_header_flags(eb, flags | flag); |
| 1965 | return (flags & flag) == flag; |
| 1966 | } |
| 1967 | |
| 1968 | static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) |
| 1969 | { |
| 1970 | u64 flags = btrfs_header_flags(eb); |
| 1971 | btrfs_set_header_flags(eb, flags & ~flag); |
| 1972 | return (flags & flag) == flag; |
| 1973 | } |
| 1974 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 1975 | static inline int btrfs_header_backref_rev(struct extent_buffer *eb) |
| 1976 | { |
| 1977 | u64 flags = btrfs_header_flags(eb); |
| 1978 | return flags >> BTRFS_BACKREF_REV_SHIFT; |
| 1979 | } |
| 1980 | |
| 1981 | static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, |
| 1982 | int rev) |
| 1983 | { |
| 1984 | u64 flags = btrfs_header_flags(eb); |
| 1985 | flags &= ~BTRFS_BACKREF_REV_MASK; |
| 1986 | flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; |
| 1987 | btrfs_set_header_flags(eb, flags); |
| 1988 | } |
| 1989 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1990 | static inline u8 *btrfs_header_fsid(struct extent_buffer *eb) |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1991 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 1992 | unsigned long ptr = offsetof(struct btrfs_header, fsid); |
| 1993 | return (u8 *)ptr; |
Chris Mason | e2fa722 | 2007-03-12 16:22:34 -0400 | [diff] [blame] | 1994 | } |
| 1995 | |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 1996 | static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb) |
| 1997 | { |
| 1998 | unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid); |
| 1999 | return (u8 *)ptr; |
| 2000 | } |
| 2001 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2002 | static inline int btrfs_is_leaf(struct extent_buffer *eb) |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 2003 | { |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2004 | return btrfs_header_level(eb) == 0; |
Chris Mason | 7518a23 | 2007-03-12 12:01:18 -0400 | [diff] [blame] | 2005 | } |
| 2006 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2007 | /* struct btrfs_root_item */ |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2008 | BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, |
| 2009 | generation, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2010 | BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2011 | BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); |
| 2012 | BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2013 | |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2014 | BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, |
| 2015 | generation, 64); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2016 | BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); |
| 2017 | BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2018 | BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); |
| 2019 | BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2020 | BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2021 | BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); |
| 2022 | 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] | 2023 | BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, |
| 2024 | last_snapshot, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2025 | |
Li Zefan | b83cc96 | 2010-12-20 16:04:08 +0800 | [diff] [blame] | 2026 | static inline bool btrfs_root_readonly(struct btrfs_root *root) |
| 2027 | { |
| 2028 | return root->root_item.flags & BTRFS_ROOT_SUBVOL_RDONLY; |
| 2029 | } |
| 2030 | |
Chris Mason | af31f5e | 2011-11-03 15:17:42 -0400 | [diff] [blame] | 2031 | /* struct btrfs_root_backup */ |
| 2032 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, |
| 2033 | tree_root, 64); |
| 2034 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, |
| 2035 | tree_root_gen, 64); |
| 2036 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, |
| 2037 | tree_root_level, 8); |
| 2038 | |
| 2039 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, |
| 2040 | chunk_root, 64); |
| 2041 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, |
| 2042 | chunk_root_gen, 64); |
| 2043 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, |
| 2044 | chunk_root_level, 8); |
| 2045 | |
| 2046 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, |
| 2047 | extent_root, 64); |
| 2048 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, |
| 2049 | extent_root_gen, 64); |
| 2050 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, |
| 2051 | extent_root_level, 8); |
| 2052 | |
| 2053 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, |
| 2054 | fs_root, 64); |
| 2055 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, |
| 2056 | fs_root_gen, 64); |
| 2057 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, |
| 2058 | fs_root_level, 8); |
| 2059 | |
| 2060 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, |
| 2061 | dev_root, 64); |
| 2062 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, |
| 2063 | dev_root_gen, 64); |
| 2064 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, |
| 2065 | dev_root_level, 8); |
| 2066 | |
| 2067 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, |
| 2068 | csum_root, 64); |
| 2069 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, |
| 2070 | csum_root_gen, 64); |
| 2071 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, |
| 2072 | csum_root_level, 8); |
| 2073 | BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, |
| 2074 | total_bytes, 64); |
| 2075 | BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, |
| 2076 | bytes_used, 64); |
| 2077 | BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, |
| 2078 | num_devices, 64); |
| 2079 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2080 | /* struct btrfs_super_block */ |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 2081 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2082 | BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 2083 | BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2084 | BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, |
| 2085 | generation, 64); |
| 2086 | BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2087 | BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, |
| 2088 | struct btrfs_super_block, sys_chunk_array_size, 32); |
Yan Zheng | 84234f3 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2089 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, |
| 2090 | struct btrfs_super_block, chunk_root_generation, 64); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2091 | BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, |
| 2092 | root_level, 8); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2093 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, |
| 2094 | chunk_root, 64); |
| 2095 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2096 | chunk_root_level, 8); |
| 2097 | BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, |
| 2098 | log_root, 64); |
Chris Mason | c3027eb | 2008-12-08 16:40:21 -0500 | [diff] [blame] | 2099 | BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, |
| 2100 | log_root_transid, 64); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2101 | BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, |
| 2102 | log_root_level, 8); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2103 | BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, |
| 2104 | total_bytes, 64); |
| 2105 | BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, |
| 2106 | bytes_used, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2107 | BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, |
| 2108 | sectorsize, 32); |
| 2109 | BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, |
| 2110 | nodesize, 32); |
| 2111 | BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, |
| 2112 | leafsize, 32); |
Chris Mason | 87ee04e | 2007-11-30 11:30:34 -0500 | [diff] [blame] | 2113 | BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, |
| 2114 | stripesize, 32); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2115 | BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, |
| 2116 | root_dir_objectid, 64); |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 2117 | BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, |
| 2118 | num_devices, 64); |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2119 | BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, |
| 2120 | compat_flags, 64); |
| 2121 | BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, |
Josef Bacik | 1253483 | 2009-12-17 21:32:27 +0000 | [diff] [blame] | 2122 | compat_ro_flags, 64); |
Josef Bacik | f2b636e | 2008-12-02 06:36:08 -0500 | [diff] [blame] | 2123 | BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, |
| 2124 | incompat_flags, 64); |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 2125 | BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, |
| 2126 | csum_type, 16); |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 2127 | BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, |
| 2128 | cache_generation, 64); |
Josef Bacik | 607d432 | 2008-12-02 07:17:45 -0500 | [diff] [blame] | 2129 | |
| 2130 | static inline int btrfs_super_csum_size(struct btrfs_super_block *s) |
| 2131 | { |
| 2132 | int t = btrfs_super_csum_type(s); |
| 2133 | BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes)); |
| 2134 | return btrfs_csum_sizes[t]; |
| 2135 | } |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2136 | |
| 2137 | static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) |
Chris Mason | 7f5c151 | 2007-03-23 15:56:19 -0400 | [diff] [blame] | 2138 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2139 | return offsetof(struct btrfs_leaf, items); |
Chris Mason | 7f5c151 | 2007-03-23 15:56:19 -0400 | [diff] [blame] | 2140 | } |
| 2141 | |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2142 | /* struct btrfs_file_extent_item */ |
| 2143 | 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] | 2144 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2145 | static inline unsigned long |
| 2146 | btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e) |
Chris Mason | 236454df | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 2147 | { |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2148 | unsigned long offset = (unsigned long)e; |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2149 | offset += offsetof(struct btrfs_file_extent_item, disk_bytenr); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2150 | return offset; |
Chris Mason | 236454df | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 2151 | } |
| 2152 | |
| 2153 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) |
| 2154 | { |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2155 | return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize; |
Chris Mason | 236454df | 2007-04-19 13:37:44 -0400 | [diff] [blame] | 2156 | } |
| 2157 | |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2158 | BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, |
| 2159 | disk_bytenr, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2160 | BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, |
| 2161 | generation, 64); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2162 | BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, |
| 2163 | disk_num_bytes, 64); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2164 | BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, |
| 2165 | offset, 64); |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2166 | BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, |
| 2167 | num_bytes, 64); |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 2168 | BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, |
| 2169 | ram_bytes, 64); |
| 2170 | BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, |
| 2171 | compression, 8); |
| 2172 | BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, |
| 2173 | encryption, 8); |
| 2174 | BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, |
| 2175 | other_encoding, 16); |
| 2176 | |
| 2177 | /* this returns the number of file bytes represented by the inline item. |
| 2178 | * If an item is compressed, this is the uncompressed size |
| 2179 | */ |
| 2180 | static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, |
| 2181 | struct btrfs_file_extent_item *e) |
| 2182 | { |
| 2183 | return btrfs_file_extent_ram_bytes(eb, e); |
| 2184 | } |
| 2185 | |
| 2186 | /* |
| 2187 | * this returns the number of bytes used by the item on disk, minus the |
| 2188 | * size of any extent headers. If a file is compressed on disk, this is |
| 2189 | * the compressed size |
| 2190 | */ |
| 2191 | static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb, |
| 2192 | struct btrfs_item *e) |
| 2193 | { |
| 2194 | unsigned long offset; |
| 2195 | offset = offsetof(struct btrfs_file_extent_item, disk_bytenr); |
| 2196 | return btrfs_item_size(eb, e) - offset; |
| 2197 | } |
Chris Mason | 9f5fae2 | 2007-03-20 14:38:32 -0400 | [diff] [blame] | 2198 | |
Chris Mason | e20d96d | 2007-03-22 12:13:20 -0400 | [diff] [blame] | 2199 | static inline struct btrfs_root *btrfs_sb(struct super_block *sb) |
| 2200 | { |
| 2201 | return sb->s_fs_info; |
| 2202 | } |
| 2203 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2204 | static inline u32 btrfs_level_size(struct btrfs_root *root, int level) |
| 2205 | { |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2206 | if (level == 0) |
| 2207 | return root->leafsize; |
| 2208 | return root->nodesize; |
| 2209 | } |
| 2210 | |
Chris Mason | 4beb1b8 | 2007-03-14 10:31:29 -0400 | [diff] [blame] | 2211 | /* helper function to cast into the data area of the leaf. */ |
| 2212 | #define btrfs_item_ptr(leaf, slot, type) \ |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 2213 | ((type *)(btrfs_leaf_data(leaf) + \ |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2214 | btrfs_item_offset_nr(leaf, slot))) |
| 2215 | |
| 2216 | #define btrfs_item_ptr_offset(leaf, slot) \ |
| 2217 | ((unsigned long)(btrfs_leaf_data(leaf) + \ |
| 2218 | btrfs_item_offset_nr(leaf, slot))) |
Chris Mason | 4beb1b8 | 2007-03-14 10:31:29 -0400 | [diff] [blame] | 2219 | |
Chris Mason | 2b1f55b | 2008-09-24 11:48:04 -0400 | [diff] [blame] | 2220 | static inline struct dentry *fdentry(struct file *file) |
| 2221 | { |
Chris Mason | 6da6aba | 2007-12-18 16:15:09 -0500 | [diff] [blame] | 2222 | return file->f_path.dentry; |
Chris Mason | 6da6aba | 2007-12-18 16:15:09 -0500 | [diff] [blame] | 2223 | } |
| 2224 | |
Josef Bacik | 6737773 | 2010-09-16 16:19:09 -0400 | [diff] [blame] | 2225 | static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) |
| 2226 | { |
| 2227 | return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && |
| 2228 | (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); |
| 2229 | } |
| 2230 | |
Josef Bacik | 3b16a4e | 2011-09-21 15:05:58 -0400 | [diff] [blame] | 2231 | static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) |
| 2232 | { |
| 2233 | return mapping_gfp_mask(mapping) & ~__GFP_FS; |
| 2234 | } |
| 2235 | |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 2236 | /* extent-tree.c */ |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2237 | static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root, |
Josef Bacik | 9e0baf6 | 2011-07-15 15:16:44 +0000 | [diff] [blame] | 2238 | unsigned num_items) |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2239 | { |
| 2240 | return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) * |
| 2241 | 3 * num_items; |
| 2242 | } |
| 2243 | |
Josef Bacik | 0712718 | 2011-08-19 10:29:59 -0400 | [diff] [blame] | 2244 | /* |
| 2245 | * Doing a truncate won't result in new nodes or leaves, just what we need for |
| 2246 | * COW. |
| 2247 | */ |
| 2248 | static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root, |
| 2249 | unsigned num_items) |
| 2250 | { |
| 2251 | return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) * |
| 2252 | num_items; |
| 2253 | } |
| 2254 | |
Chris Mason | fa9c0d79 | 2009-04-03 09:47:43 -0400 | [diff] [blame] | 2255 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); |
Chris Mason | 56bec29 | 2009-03-13 10:10:06 -0400 | [diff] [blame] | 2256 | int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, |
| 2257 | struct btrfs_root *root, unsigned long count); |
Zheng Yan | 31840ae | 2008-09-23 13:14:14 -0400 | [diff] [blame] | 2258 | int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len); |
Yan, Zheng | a22285a | 2010-05-16 10:48:46 -0400 | [diff] [blame] | 2259 | int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, |
| 2260 | struct btrfs_root *root, u64 bytenr, |
| 2261 | u64 num_bytes, u64 *refs, u64 *flags); |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 2262 | int btrfs_pin_extent(struct btrfs_root *root, |
| 2263 | u64 bytenr, u64 num, int reserved); |
Chris Mason | e688b725 | 2011-10-31 20:52:39 -0400 | [diff] [blame] | 2264 | int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans, |
| 2265 | struct btrfs_root *root, |
| 2266 | u64 bytenr, u64 num_bytes); |
Yan Zheng | 80ff385 | 2008-10-30 14:20:02 -0400 | [diff] [blame] | 2267 | int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans, |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2268 | struct btrfs_root *root, |
| 2269 | u64 objectid, u64 offset, u64 bytenr); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2270 | struct btrfs_block_group_cache *btrfs_lookup_block_group( |
| 2271 | struct btrfs_fs_info *info, |
| 2272 | u64 bytenr); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2273 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); |
Yan Zheng | d2fb343 | 2008-12-11 16:30:39 -0500 | [diff] [blame] | 2274 | u64 btrfs_find_block_group(struct btrfs_root *root, |
| 2275 | u64 search_start, u64 search_hint, int owner); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2276 | struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2277 | struct btrfs_root *root, u32 blocksize, |
| 2278 | u64 parent, u64 root_objectid, |
| 2279 | struct btrfs_disk_key *key, int level, |
| 2280 | u64 hint, u64 empty_size); |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 2281 | void btrfs_free_tree_block(struct btrfs_trans_handle *trans, |
| 2282 | struct btrfs_root *root, |
| 2283 | struct extent_buffer *buf, |
| 2284 | u64 parent, int last_ref); |
Chris Mason | 65b51a0 | 2008-08-01 15:11:20 -0400 | [diff] [blame] | 2285 | struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans, |
| 2286 | struct btrfs_root *root, |
Chris Mason | 4008c04 | 2009-02-12 14:09:45 -0500 | [diff] [blame] | 2287 | u64 bytenr, u32 blocksize, |
| 2288 | int level); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2289 | int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, |
| 2290 | struct btrfs_root *root, |
| 2291 | u64 root_objectid, u64 owner, |
| 2292 | u64 offset, struct btrfs_key *ins); |
| 2293 | int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, |
| 2294 | struct btrfs_root *root, |
| 2295 | u64 root_objectid, u64 owner, u64 offset, |
| 2296 | struct btrfs_key *ins); |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 2297 | int btrfs_reserve_extent(struct btrfs_trans_handle *trans, |
| 2298 | struct btrfs_root *root, |
| 2299 | u64 num_bytes, u64 min_alloc_size, |
| 2300 | u64 empty_size, u64 hint_byte, |
| 2301 | u64 search_end, struct btrfs_key *ins, |
| 2302 | u64 data); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 2303 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2304 | struct extent_buffer *buf, int full_backref); |
| 2305 | int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 2306 | struct extent_buffer *buf, int full_backref); |
| 2307 | int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, |
| 2308 | struct btrfs_root *root, |
| 2309 | u64 bytenr, u64 num_bytes, u64 flags, |
| 2310 | int is_data); |
Zheng Yan | 31840ae | 2008-09-23 13:14:14 -0400 | [diff] [blame] | 2311 | int btrfs_free_extent(struct btrfs_trans_handle *trans, |
| 2312 | struct btrfs_root *root, |
| 2313 | u64 bytenr, u64 num_bytes, u64 parent, |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2314 | u64 root_objectid, u64 owner, u64 offset); |
| 2315 | |
Chris Mason | 65b51a0 | 2008-08-01 15:11:20 -0400 | [diff] [blame] | 2316 | 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] | 2317 | int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root, |
| 2318 | u64 start, u64 len); |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 2319 | int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans, |
| 2320 | struct btrfs_root *root); |
Chris Mason | ccd467d | 2007-06-28 15:57:36 -0400 | [diff] [blame] | 2321 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, |
Yan Zheng | 11833d6 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 2322 | struct btrfs_root *root); |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 2323 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
Zheng Yan | 31840ae | 2008-09-23 13:14:14 -0400 | [diff] [blame] | 2324 | struct btrfs_root *root, |
| 2325 | u64 bytenr, u64 num_bytes, u64 parent, |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2326 | u64 root_objectid, u64 owner, u64 offset); |
| 2327 | |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 2328 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, |
| 2329 | struct btrfs_root *root); |
Yan Zheng | d2fb343 | 2008-12-11 16:30:39 -0500 | [diff] [blame] | 2330 | int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr); |
Chris Mason | 9078a3e | 2007-04-26 16:46:15 -0400 | [diff] [blame] | 2331 | int btrfs_free_block_groups(struct btrfs_fs_info *info); |
| 2332 | int btrfs_read_block_groups(struct btrfs_root *root); |
Josef Bacik | ba1bf48 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 2333 | int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2334 | int btrfs_make_block_group(struct btrfs_trans_handle *trans, |
| 2335 | struct btrfs_root *root, u64 bytes_used, |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 2336 | u64 type, u64 chunk_objectid, u64 chunk_offset, |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2337 | u64 size); |
Zheng Yan | 1a40e23 | 2008-09-26 10:09:34 -0400 | [diff] [blame] | 2338 | int btrfs_remove_block_group(struct btrfs_trans_handle *trans, |
| 2339 | struct btrfs_root *root, u64 group_start); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 2340 | u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags); |
Miao Xie | 6d07bce | 2011-01-05 10:07:31 +0000 | [diff] [blame] | 2341 | u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data); |
Josef Bacik | 6a63209 | 2009-02-20 11:00:09 -0500 | [diff] [blame] | 2342 | 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] | 2343 | void btrfs_clear_space_info_full(struct btrfs_fs_info *info); |
Yan, Zheng | 0ca1f7c | 2010-05-16 10:48:47 -0400 | [diff] [blame] | 2344 | int btrfs_check_data_free_space(struct inode *inode, u64 bytes); |
| 2345 | void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes); |
Yan, Zheng | a22285a | 2010-05-16 10:48:46 -0400 | [diff] [blame] | 2346 | void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans, |
| 2347 | struct btrfs_root *root); |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 2348 | int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans, |
| 2349 | struct inode *inode); |
| 2350 | void btrfs_orphan_release_metadata(struct inode *inode); |
Yan, Zheng | a22285a | 2010-05-16 10:48:46 -0400 | [diff] [blame] | 2351 | int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans, |
| 2352 | struct btrfs_pending_snapshot *pending); |
Yan, Zheng | 0ca1f7c | 2010-05-16 10:48:47 -0400 | [diff] [blame] | 2353 | int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes); |
| 2354 | void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes); |
| 2355 | int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes); |
| 2356 | void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes); |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 2357 | void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv); |
| 2358 | struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root); |
| 2359 | void btrfs_free_block_rsv(struct btrfs_root *root, |
| 2360 | struct btrfs_block_rsv *rsv); |
Josef Bacik | 4a92b1b | 2011-08-30 12:34:28 -0400 | [diff] [blame] | 2361 | int btrfs_block_rsv_add(struct btrfs_root *root, |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 2362 | struct btrfs_block_rsv *block_rsv, |
Josef Bacik | 8bb8ab2 | 2010-10-15 16:52:49 -0400 | [diff] [blame] | 2363 | u64 num_bytes); |
Josef Bacik | c06a0e1 | 2011-11-04 19:56:02 -0400 | [diff] [blame] | 2364 | int btrfs_block_rsv_add_noflush(struct btrfs_root *root, |
| 2365 | struct btrfs_block_rsv *block_rsv, |
| 2366 | u64 num_bytes); |
Josef Bacik | 4a92b1b | 2011-08-30 12:34:28 -0400 | [diff] [blame] | 2367 | int btrfs_block_rsv_check(struct btrfs_root *root, |
Josef Bacik | 36ba022 | 2011-10-18 12:15:48 -0400 | [diff] [blame] | 2368 | struct btrfs_block_rsv *block_rsv, int min_factor); |
| 2369 | int btrfs_block_rsv_refill(struct btrfs_root *root, |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 2370 | struct btrfs_block_rsv *block_rsv, |
Josef Bacik | 36ba022 | 2011-10-18 12:15:48 -0400 | [diff] [blame] | 2371 | u64 min_reserved); |
Miao Xie | aa38a71 | 2011-11-18 17:43:00 +0800 | [diff] [blame] | 2372 | int btrfs_block_rsv_refill_noflush(struct btrfs_root *root, |
| 2373 | struct btrfs_block_rsv *block_rsv, |
| 2374 | u64 min_reserved); |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 2375 | int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, |
| 2376 | struct btrfs_block_rsv *dst_rsv, |
| 2377 | u64 num_bytes); |
| 2378 | void btrfs_block_rsv_release(struct btrfs_root *root, |
| 2379 | struct btrfs_block_rsv *block_rsv, |
| 2380 | u64 num_bytes); |
| 2381 | int btrfs_set_block_group_ro(struct btrfs_root *root, |
| 2382 | struct btrfs_block_group_cache *cache); |
| 2383 | int btrfs_set_block_group_rw(struct btrfs_root *root, |
| 2384 | struct btrfs_block_group_cache *cache); |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 2385 | void btrfs_put_block_group_cache(struct btrfs_fs_info *info); |
Miao Xie | 6d07bce | 2011-01-05 10:07:31 +0000 | [diff] [blame] | 2386 | u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 2387 | int btrfs_error_unpin_extent_range(struct btrfs_root *root, |
| 2388 | u64 start, u64 end); |
| 2389 | int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr, |
Li Dongyang | 5378e60 | 2011-03-24 10:24:27 +0000 | [diff] [blame] | 2390 | u64 num_bytes, u64 *actual_bytes); |
Chris Mason | c87f08c | 2011-02-16 13:57:04 -0500 | [diff] [blame] | 2391 | int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, |
| 2392 | struct btrfs_root *root, u64 type); |
Li Dongyang | f7039b1 | 2011-03-24 10:24:28 +0000 | [diff] [blame] | 2393 | int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 2394 | |
liubo | c59021f | 2011-03-07 02:13:14 +0000 | [diff] [blame] | 2395 | int btrfs_init_space_info(struct btrfs_fs_info *fs_info); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 2396 | /* ctree.c */ |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2397 | int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key, |
| 2398 | int level, int *slot); |
| 2399 | 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] | 2400 | int btrfs_previous_item(struct btrfs_root *root, |
| 2401 | struct btrfs_path *path, u64 min_objectid, |
| 2402 | int type); |
Zheng Yan | 31840ae | 2008-09-23 13:14:14 -0400 | [diff] [blame] | 2403 | int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans, |
| 2404 | struct btrfs_root *root, struct btrfs_path *path, |
| 2405 | struct btrfs_key *new_key); |
Chris Mason | 925baed | 2008-06-25 16:01:30 -0400 | [diff] [blame] | 2406 | struct extent_buffer *btrfs_root_node(struct btrfs_root *root); |
| 2407 | struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); |
Chris Mason | e7a8456 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2408 | 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] | 2409 | struct btrfs_key *key, int lowest_level, |
| 2410 | int cache_only, u64 min_trans); |
| 2411 | 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] | 2412 | struct btrfs_key *max_key, |
Chris Mason | 3f157a2 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 2413 | struct btrfs_path *path, int cache_only, |
| 2414 | u64 min_trans); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2415 | int btrfs_cow_block(struct btrfs_trans_handle *trans, |
| 2416 | struct btrfs_root *root, struct extent_buffer *buf, |
| 2417 | struct extent_buffer *parent, int parent_slot, |
Chris Mason | 9fa8cfe | 2009-03-13 10:24:59 -0400 | [diff] [blame] | 2418 | struct extent_buffer **cow_ret); |
Chris Mason | be20aa9 | 2007-12-17 20:14:01 -0500 | [diff] [blame] | 2419 | int btrfs_copy_root(struct btrfs_trans_handle *trans, |
| 2420 | struct btrfs_root *root, |
| 2421 | struct extent_buffer *buf, |
| 2422 | struct extent_buffer **cow_ret, u64 new_root_objectid); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2423 | int btrfs_block_can_be_shared(struct btrfs_root *root, |
| 2424 | struct extent_buffer *buf); |
Chris Mason | 6567e83 | 2007-04-16 09:22:45 -0400 | [diff] [blame] | 2425 | int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| 2426 | *root, struct btrfs_path *path, u32 data_size); |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 2427 | int btrfs_truncate_item(struct btrfs_trans_handle *trans, |
| 2428 | struct btrfs_root *root, |
| 2429 | struct btrfs_path *path, |
Chris Mason | 179e29e | 2007-11-01 11:28:41 -0400 | [diff] [blame] | 2430 | u32 new_size, int from_end); |
Chris Mason | 459931e | 2008-12-10 09:10:46 -0500 | [diff] [blame] | 2431 | int btrfs_split_item(struct btrfs_trans_handle *trans, |
| 2432 | struct btrfs_root *root, |
| 2433 | struct btrfs_path *path, |
| 2434 | struct btrfs_key *new_key, |
| 2435 | unsigned long split_offset); |
Yan, Zheng | ad48fd75 | 2009-11-12 09:33:58 +0000 | [diff] [blame] | 2436 | int btrfs_duplicate_item(struct btrfs_trans_handle *trans, |
| 2437 | struct btrfs_root *root, |
| 2438 | struct btrfs_path *path, |
| 2439 | struct btrfs_key *new_key); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 2440 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
| 2441 | *root, struct btrfs_key *key, struct btrfs_path *p, int |
| 2442 | ins_len, int cow); |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 2443 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2444 | struct btrfs_root *root, struct extent_buffer *parent, |
Chris Mason | a6b6e75 | 2007-10-15 16:22:39 -0400 | [diff] [blame] | 2445 | int start_slot, int cache_only, u64 *last_ret, |
| 2446 | struct btrfs_key *progress); |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 2447 | void btrfs_release_path(struct btrfs_path *p); |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 2448 | struct btrfs_path *btrfs_alloc_path(void); |
| 2449 | void btrfs_free_path(struct btrfs_path *p); |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 2450 | void btrfs_set_path_blocking(struct btrfs_path *p); |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2451 | void btrfs_clear_path_blocking(struct btrfs_path *p, |
Chris Mason | bd68151 | 2011-07-16 15:23:14 -0400 | [diff] [blame] | 2452 | struct extent_buffer *held, int held_rw); |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 2453 | void btrfs_unlock_up_safe(struct btrfs_path *p, int level); |
| 2454 | |
Chris Mason | 85e21ba | 2008-01-29 15:11:36 -0500 | [diff] [blame] | 2455 | int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 2456 | struct btrfs_path *path, int slot, int nr); |
Chris Mason | 85e21ba | 2008-01-29 15:11:36 -0500 | [diff] [blame] | 2457 | static inline int btrfs_del_item(struct btrfs_trans_handle *trans, |
| 2458 | struct btrfs_root *root, |
| 2459 | struct btrfs_path *path) |
| 2460 | { |
| 2461 | return btrfs_del_items(trans, root, path, path->slots[0], 1); |
| 2462 | } |
| 2463 | |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2464 | int setup_items_for_insert(struct btrfs_trans_handle *trans, |
| 2465 | struct btrfs_root *root, struct btrfs_path *path, |
| 2466 | struct btrfs_key *cpu_key, u32 *data_size, |
| 2467 | u32 total_data, u32 total_size, int nr); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 2468 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| 2469 | *root, struct btrfs_key *key, void *data, u32 data_size); |
Chris Mason | 9c58309 | 2008-01-29 15:15:18 -0500 | [diff] [blame] | 2470 | int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, |
| 2471 | struct btrfs_root *root, |
| 2472 | struct btrfs_path *path, |
| 2473 | struct btrfs_key *cpu_key, u32 *data_size, int nr); |
| 2474 | |
| 2475 | static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, |
| 2476 | struct btrfs_root *root, |
| 2477 | struct btrfs_path *path, |
| 2478 | struct btrfs_key *key, |
| 2479 | u32 data_size) |
| 2480 | { |
| 2481 | return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); |
| 2482 | } |
| 2483 | |
Chris Mason | 234b63a | 2007-03-13 10:46:10 -0400 | [diff] [blame] | 2484 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
Chris Mason | 7bb8631 | 2007-12-11 09:25:06 -0500 | [diff] [blame] | 2485 | int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2486 | int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); |
Tsutomu Itoh | cb1b69f | 2011-08-09 07:11:13 +0000 | [diff] [blame] | 2487 | void btrfs_drop_snapshot(struct btrfs_root *root, |
| 2488 | struct btrfs_block_rsv *block_rsv, int update_ref); |
Yan Zheng | f82d02d | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 2489 | int btrfs_drop_subtree(struct btrfs_trans_handle *trans, |
| 2490 | struct btrfs_root *root, |
| 2491 | struct extent_buffer *node, |
| 2492 | struct extent_buffer *parent); |
David Sterba | 7841cb2 | 2011-05-31 18:07:27 +0200 | [diff] [blame] | 2493 | static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) |
| 2494 | { |
| 2495 | /* |
| 2496 | * Get synced with close_ctree() |
| 2497 | */ |
| 2498 | smp_mb(); |
| 2499 | return fs_info->closing; |
| 2500 | } |
David Sterba | 6c41761 | 2011-04-13 15:41:04 +0200 | [diff] [blame] | 2501 | static inline void free_fs_info(struct btrfs_fs_info *fs_info) |
| 2502 | { |
| 2503 | kfree(fs_info->delayed_root); |
| 2504 | kfree(fs_info->extent_root); |
| 2505 | kfree(fs_info->tree_root); |
| 2506 | kfree(fs_info->chunk_root); |
| 2507 | kfree(fs_info->dev_root); |
| 2508 | kfree(fs_info->csum_root); |
| 2509 | kfree(fs_info->super_copy); |
| 2510 | kfree(fs_info->super_for_commit); |
| 2511 | kfree(fs_info); |
| 2512 | } |
David Sterba | 7841cb2 | 2011-05-31 18:07:27 +0200 | [diff] [blame] | 2513 | |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 2514 | /* root-item.c */ |
Chris Mason | ea9e8b1 | 2008-11-17 21:14:24 -0500 | [diff] [blame] | 2515 | int btrfs_find_root_ref(struct btrfs_root *tree_root, |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2516 | struct btrfs_path *path, |
| 2517 | u64 root_id, u64 ref_id); |
Chris Mason | 0660b5a | 2008-11-17 20:37:39 -0500 | [diff] [blame] | 2518 | int btrfs_add_root_ref(struct btrfs_trans_handle *trans, |
| 2519 | struct btrfs_root *tree_root, |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2520 | u64 root_id, u64 ref_id, u64 dirid, u64 sequence, |
| 2521 | const char *name, int name_len); |
| 2522 | int btrfs_del_root_ref(struct btrfs_trans_handle *trans, |
| 2523 | struct btrfs_root *tree_root, |
| 2524 | u64 root_id, u64 ref_id, u64 dirid, u64 *sequence, |
Chris Mason | 0660b5a | 2008-11-17 20:37:39 -0500 | [diff] [blame] | 2525 | const char *name, int name_len); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 2526 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 2527 | struct btrfs_key *key); |
| 2528 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root |
| 2529 | *root, struct btrfs_key *key, struct btrfs_root_item |
| 2530 | *item); |
| 2531 | int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root |
| 2532 | *root, struct btrfs_key *key, struct btrfs_root_item |
| 2533 | *item); |
| 2534 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct |
| 2535 | btrfs_root_item *item, struct btrfs_key *key); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2536 | int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2537 | int btrfs_find_orphan_roots(struct btrfs_root *tree_root); |
Mark Fasheh | bf5f32e | 2011-07-14 21:23:06 +0000 | [diff] [blame] | 2538 | void btrfs_set_root_node(struct btrfs_root_item *item, |
| 2539 | struct extent_buffer *node); |
Li Zefan | 08fe4db | 2011-03-28 02:01:25 +0000 | [diff] [blame] | 2540 | void btrfs_check_and_init_root_item(struct btrfs_root_item *item); |
| 2541 | |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 2542 | /* dir-item.c */ |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2543 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, |
| 2544 | struct btrfs_root *root, const char *name, |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 2545 | int name_len, struct inode *dir, |
Josef Bacik | aec7477 | 2008-07-24 12:12:38 -0400 | [diff] [blame] | 2546 | struct btrfs_key *location, u8 type, u64 index); |
Chris Mason | 7e38180 | 2007-04-19 15:36:27 -0400 | [diff] [blame] | 2547 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
| 2548 | struct btrfs_root *root, |
| 2549 | struct btrfs_path *path, u64 dir, |
| 2550 | const char *name, int name_len, |
| 2551 | int mod); |
| 2552 | struct btrfs_dir_item * |
| 2553 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, |
| 2554 | struct btrfs_root *root, |
| 2555 | struct btrfs_path *path, u64 dir, |
| 2556 | u64 objectid, const char *name, int name_len, |
| 2557 | int mod); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2558 | struct btrfs_dir_item * |
| 2559 | btrfs_search_dir_index_item(struct btrfs_root *root, |
| 2560 | struct btrfs_path *path, u64 dirid, |
| 2561 | const char *name, int name_len); |
Chris Mason | 7e38180 | 2007-04-19 15:36:27 -0400 | [diff] [blame] | 2562 | struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, |
| 2563 | struct btrfs_path *path, |
Chris Mason | 7f5c151 | 2007-03-23 15:56:19 -0400 | [diff] [blame] | 2564 | const char *name, int name_len); |
Chris Mason | 7e38180 | 2007-04-19 15:36:27 -0400 | [diff] [blame] | 2565 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
| 2566 | struct btrfs_root *root, |
| 2567 | struct btrfs_path *path, |
| 2568 | struct btrfs_dir_item *di); |
Josef Bacik | 5103e94 | 2007-11-16 11:45:54 -0500 | [diff] [blame] | 2569 | int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, |
Yan, Zheng | f34f57a | 2009-11-12 09:35:27 +0000 | [diff] [blame] | 2570 | struct btrfs_root *root, |
| 2571 | struct btrfs_path *path, u64 objectid, |
| 2572 | const char *name, u16 name_len, |
| 2573 | const void *data, u16 data_len); |
Josef Bacik | 5103e94 | 2007-11-16 11:45:54 -0500 | [diff] [blame] | 2574 | struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, |
| 2575 | struct btrfs_root *root, |
| 2576 | struct btrfs_path *path, u64 dir, |
| 2577 | const char *name, u16 name_len, |
| 2578 | int mod); |
Josef Bacik | 22a94d4 | 2011-03-16 16:47:17 -0400 | [diff] [blame] | 2579 | int verify_dir_item(struct btrfs_root *root, |
| 2580 | struct extent_buffer *leaf, |
| 2581 | struct btrfs_dir_item *dir_item); |
Josef Bacik | 7b12876 | 2008-07-24 12:17:14 -0400 | [diff] [blame] | 2582 | |
| 2583 | /* orphan.c */ |
| 2584 | int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, |
| 2585 | struct btrfs_root *root, u64 offset); |
| 2586 | int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, |
| 2587 | struct btrfs_root *root, u64 offset); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2588 | int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); |
Josef Bacik | 7b12876 | 2008-07-24 12:17:14 -0400 | [diff] [blame] | 2589 | |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 2590 | /* inode-item.c */ |
Chris Mason | 3954401 | 2007-12-12 14:38:19 -0500 | [diff] [blame] | 2591 | int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, |
| 2592 | struct btrfs_root *root, |
| 2593 | const char *name, int name_len, |
Josef Bacik | aec7477 | 2008-07-24 12:12:38 -0400 | [diff] [blame] | 2594 | u64 inode_objectid, u64 ref_objectid, u64 index); |
Chris Mason | 3954401 | 2007-12-12 14:38:19 -0500 | [diff] [blame] | 2595 | int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, |
| 2596 | struct btrfs_root *root, |
| 2597 | const char *name, int name_len, |
Josef Bacik | aec7477 | 2008-07-24 12:12:38 -0400 | [diff] [blame] | 2598 | u64 inode_objectid, u64 ref_objectid, u64 *index); |
Yan, Zheng | a22285a | 2010-05-16 10:48:46 -0400 | [diff] [blame] | 2599 | struct btrfs_inode_ref * |
| 2600 | btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans, |
| 2601 | struct btrfs_root *root, |
| 2602 | struct btrfs_path *path, |
| 2603 | const char *name, int name_len, |
| 2604 | u64 inode_objectid, u64 ref_objectid, int mod); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 2605 | int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, |
| 2606 | struct btrfs_root *root, |
| 2607 | struct btrfs_path *path, u64 objectid); |
Chris Mason | 293ffd5 | 2007-03-20 15:57:25 -0400 | [diff] [blame] | 2608 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 2609 | *root, struct btrfs_path *path, |
| 2610 | struct btrfs_key *location, int mod); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 2611 | |
| 2612 | /* file-item.c */ |
Chris Mason | 459931e | 2008-12-10 09:10:46 -0500 | [diff] [blame] | 2613 | int btrfs_del_csums(struct btrfs_trans_handle *trans, |
| 2614 | struct btrfs_root *root, u64 bytenr, u64 len); |
Chris Mason | 61b4944 | 2008-07-31 15:42:53 -0400 | [diff] [blame] | 2615 | int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode, |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2616 | struct bio *bio, u32 *dst); |
Josef Bacik | 4b46fce | 2010-05-23 11:00:55 -0400 | [diff] [blame] | 2617 | int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode, |
| 2618 | struct bio *bio, u64 logical_offset, u32 *dst); |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 2619 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 2620 | struct btrfs_root *root, |
| 2621 | u64 objectid, u64 pos, |
| 2622 | u64 disk_offset, u64 disk_num_bytes, |
| 2623 | u64 num_bytes, u64 offset, u64 ram_bytes, |
| 2624 | u8 compression, u8 encryption, u16 other_encoding); |
Chris Mason | dee26a9 | 2007-03-26 16:00:06 -0400 | [diff] [blame] | 2625 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
| 2626 | struct btrfs_root *root, |
| 2627 | struct btrfs_path *path, u64 objectid, |
Chris Mason | db94535 | 2007-10-15 16:15:53 -0400 | [diff] [blame] | 2628 | u64 bytenr, int mod); |
Chris Mason | 065631f | 2008-02-20 12:07:25 -0500 | [diff] [blame] | 2629 | int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2630 | struct btrfs_root *root, |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 2631 | struct btrfs_ordered_sum *sums); |
Chris Mason | 3edf7d3 | 2008-07-18 06:17:13 -0400 | [diff] [blame] | 2632 | int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode, |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2633 | struct bio *bio, u64 file_start, int contig); |
Chris Mason | b18c668 | 2007-04-17 13:26:50 -0400 | [diff] [blame] | 2634 | struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, |
| 2635 | struct btrfs_root *root, |
| 2636 | struct btrfs_path *path, |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 2637 | u64 bytenr, int cow); |
Chris Mason | 1de037a | 2007-05-29 15:17:08 -0400 | [diff] [blame] | 2638 | int btrfs_csum_truncate(struct btrfs_trans_handle *trans, |
| 2639 | struct btrfs_root *root, struct btrfs_path *path, |
| 2640 | u64 isize); |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 2641 | int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, |
| 2642 | struct list_head *list, int search_commit); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2643 | /* inode.c */ |
Josef Bacik | b267515 | 2011-07-18 13:21:36 -0400 | [diff] [blame] | 2644 | struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page, |
| 2645 | size_t pg_offset, u64 start, u64 len, |
| 2646 | int create); |
Chris Mason | 4881ee5 | 2008-07-24 09:51:08 -0400 | [diff] [blame] | 2647 | |
| 2648 | /* 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] | 2649 | #if defined(ClearPageFsMisc) && !defined(ClearPageChecked) |
Chris Mason | 4881ee5 | 2008-07-24 09:51:08 -0400 | [diff] [blame] | 2650 | #define ClearPageChecked ClearPageFsMisc |
| 2651 | #define SetPageChecked SetPageFsMisc |
| 2652 | #define PageChecked PageFsMisc |
| 2653 | #endif |
| 2654 | |
Li Zefan | b6973aa | 2011-07-20 03:46:35 +0000 | [diff] [blame] | 2655 | /* This forces readahead on a given range of bytes in an inode */ |
| 2656 | static inline void btrfs_force_ra(struct address_space *mapping, |
| 2657 | struct file_ra_state *ra, struct file *file, |
| 2658 | pgoff_t offset, unsigned long req_size) |
| 2659 | { |
| 2660 | page_cache_sync_readahead(mapping, ra, file, offset, req_size); |
| 2661 | } |
| 2662 | |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 2663 | struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); |
| 2664 | int btrfs_set_inode_index(struct inode *dir, u64 *index); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2665 | int btrfs_unlink_inode(struct btrfs_trans_handle *trans, |
| 2666 | struct btrfs_root *root, |
| 2667 | struct inode *dir, struct inode *inode, |
| 2668 | const char *name, int name_len); |
| 2669 | int btrfs_add_link(struct btrfs_trans_handle *trans, |
| 2670 | struct inode *parent_inode, struct inode *inode, |
| 2671 | const char *name, int name_len, int add_backref, u64 index); |
Yan, Zheng | 4df27c4d | 2009-09-21 15:56:00 -0400 | [diff] [blame] | 2672 | int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, |
| 2673 | struct btrfs_root *root, |
| 2674 | struct inode *dir, u64 objectid, |
| 2675 | const char *name, int name_len); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2676 | int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, |
| 2677 | struct btrfs_root *root, |
| 2678 | struct inode *inode, u64 new_size, |
| 2679 | u32 min_type); |
| 2680 | |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 2681 | int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput); |
Josef Bacik | 2ac55d4 | 2010-02-03 19:33:23 +0000 | [diff] [blame] | 2682 | int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, |
| 2683 | struct extent_state **cached_state); |
Chris Mason | f421950 | 2008-07-22 11:18:09 -0400 | [diff] [blame] | 2684 | int btrfs_writepages(struct address_space *mapping, |
| 2685 | struct writeback_control *wbc); |
Yan Zheng | d2fb343 | 2008-12-11 16:30:39 -0500 | [diff] [blame] | 2686 | int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, |
Josef Bacik | d82a6f1 | 2011-05-11 15:26:06 -0400 | [diff] [blame] | 2687 | struct btrfs_root *new_root, u64 new_dirid); |
Chris Mason | 239b14b | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 2688 | int btrfs_merge_bio_hook(struct page *page, unsigned long offset, |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 2689 | size_t size, struct bio *bio, unsigned long bio_flags); |
Chris Mason | 239b14b | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 2690 | |
Nick Piggin | c2ec175 | 2009-03-31 15:23:21 -0700 | [diff] [blame] | 2691 | 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] | 2692 | int btrfs_readpage(struct file *file, struct page *page); |
Al Viro | bd55597 | 2010-06-07 11:35:40 -0400 | [diff] [blame] | 2693 | void btrfs_evict_inode(struct inode *inode); |
Christoph Hellwig | a9185b4 | 2010-03-05 09:21:37 +0100 | [diff] [blame] | 2694 | int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); |
Josef Bacik | 22c44fe | 2011-11-30 10:45:38 -0500 | [diff] [blame] | 2695 | int btrfs_dirty_inode(struct inode *inode); |
| 2696 | int btrfs_update_time(struct file *file); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2697 | struct inode *btrfs_alloc_inode(struct super_block *sb); |
| 2698 | void btrfs_destroy_inode(struct inode *inode); |
Al Viro | 45321ac | 2010-06-07 13:43:19 -0400 | [diff] [blame] | 2699 | int btrfs_drop_inode(struct inode *inode); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2700 | int btrfs_init_cachep(void); |
| 2701 | void btrfs_destroy_cachep(void); |
Sage Weil | 6bf13c0 | 2008-06-10 10:07:39 -0400 | [diff] [blame] | 2702 | long btrfs_ioctl_trans_end(struct file *file); |
Balaji Rao | 1a54ef8 | 2008-07-21 02:01:04 +0530 | [diff] [blame] | 2703 | struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, |
Josef Bacik | 73f7341 | 2009-12-04 17:38:27 +0000 | [diff] [blame] | 2704 | struct btrfs_root *root, int *was_new); |
Chris Mason | a52d9a8 | 2007-08-27 16:49:44 -0400 | [diff] [blame] | 2705 | struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, |
David Sterba | 306e16c | 2011-04-19 14:29:38 +0200 | [diff] [blame] | 2706 | size_t pg_offset, u64 start, u64 end, |
Chris Mason | a52d9a8 | 2007-08-27 16:49:44 -0400 | [diff] [blame] | 2707 | int create); |
| 2708 | int btrfs_update_inode(struct btrfs_trans_handle *trans, |
| 2709 | struct btrfs_root *root, |
| 2710 | struct inode *inode); |
Zheng Yan | 5b21f2e | 2008-09-26 10:05:38 -0400 | [diff] [blame] | 2711 | int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode); |
| 2712 | int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode); |
Josef Bacik | 66b4ffd | 2011-01-31 16:22:42 -0500 | [diff] [blame] | 2713 | int btrfs_orphan_cleanup(struct btrfs_root *root); |
Yan, Zheng | d68fc57 | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 2714 | void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans, |
| 2715 | struct btrfs_root *root); |
Josef Bacik | a41ad39 | 2011-01-31 15:30:16 -0500 | [diff] [blame] | 2716 | int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 2717 | int btrfs_invalidate_inodes(struct btrfs_root *root); |
Yan, Zheng | 24bbcf0 | 2009-11-12 09:36:34 +0000 | [diff] [blame] | 2718 | void btrfs_add_delayed_iput(struct inode *inode); |
| 2719 | void btrfs_run_delayed_iputs(struct btrfs_root *root); |
Yan, Zheng | efa5646 | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 2720 | int btrfs_prealloc_file_range(struct inode *inode, int mode, |
| 2721 | u64 start, u64 num_bytes, u64 min_size, |
| 2722 | loff_t actual_len, u64 *alloc_hint); |
Josef Bacik | 0af3d00 | 2010-06-21 14:48:16 -0400 | [diff] [blame] | 2723 | int btrfs_prealloc_file_range_trans(struct inode *inode, |
| 2724 | struct btrfs_trans_handle *trans, int mode, |
| 2725 | u64 start, u64 num_bytes, u64 min_size, |
| 2726 | loff_t actual_len, u64 *alloc_hint); |
Alexey Dobriyan | 82d339d | 2009-10-09 09:54:36 -0400 | [diff] [blame] | 2727 | extern const struct dentry_operations btrfs_dentry_operations; |
Christoph Hellwig | f46b5a6 | 2008-06-11 21:53:53 -0400 | [diff] [blame] | 2728 | |
| 2729 | /* ioctl.c */ |
| 2730 | long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
Christoph Hellwig | 6cbff00 | 2009-04-17 10:37:41 +0200 | [diff] [blame] | 2731 | void btrfs_update_iflags(struct inode *inode); |
| 2732 | void btrfs_inherit_iflags(struct inode *inode, struct inode *dir); |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 2733 | int btrfs_defrag_file(struct inode *inode, struct file *file, |
| 2734 | struct btrfs_ioctl_defrag_range_args *range, |
| 2735 | u64 newer_than, unsigned long max_pages); |
Chris Mason | 39279cc | 2007-06-12 06:35:45 -0400 | [diff] [blame] | 2736 | /* file.c */ |
Chris Mason | 4cb5300 | 2011-05-24 15:35:30 -0400 | [diff] [blame] | 2737 | int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, |
| 2738 | struct inode *inode); |
| 2739 | int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); |
Josef Bacik | 02c24a8 | 2011-07-16 20:44:56 -0400 | [diff] [blame] | 2740 | 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] | 2741 | int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, |
| 2742 | int skip_pinned); |
Alexey Dobriyan | 828c095 | 2009-10-01 15:43:56 -0700 | [diff] [blame] | 2743 | extern const struct file_operations btrfs_file_operations; |
Yan, Zheng | 920bbbf | 2009-11-12 09:34:08 +0000 | [diff] [blame] | 2744 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode, |
| 2745 | u64 start, u64 end, u64 *hint_byte, int drop_cache); |
Yan Zheng | d899e05 | 2008-10-30 14:25:28 -0400 | [diff] [blame] | 2746 | int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, |
Yan Zheng | d899e05 | 2008-10-30 14:25:28 -0400 | [diff] [blame] | 2747 | struct inode *inode, u64 start, u64 end); |
Sage Weil | 6bf13c0 | 2008-06-10 10:07:39 -0400 | [diff] [blame] | 2748 | int btrfs_release_file(struct inode *inode, struct file *file); |
Josef Bacik | be1a12a | 2011-04-06 13:05:22 -0400 | [diff] [blame] | 2749 | void btrfs_drop_pages(struct page **pages, size_t num_pages); |
| 2750 | int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode, |
| 2751 | struct page **pages, size_t num_pages, |
| 2752 | loff_t pos, size_t write_bytes, |
| 2753 | struct extent_state **cached); |
Sage Weil | 6bf13c0 | 2008-06-10 10:07:39 -0400 | [diff] [blame] | 2754 | |
Chris Mason | 6702ed4 | 2007-08-07 16:15:09 -0400 | [diff] [blame] | 2755 | /* tree-defrag.c */ |
| 2756 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, |
| 2757 | struct btrfs_root *root, int cache_only); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 2758 | |
| 2759 | /* sysfs.c */ |
| 2760 | int btrfs_init_sysfs(void); |
| 2761 | void btrfs_exit_sysfs(void); |
Josef Bacik | 58176a9 | 2007-08-29 15:47:34 -0400 | [diff] [blame] | 2762 | |
Josef Bacik | 5103e94 | 2007-11-16 11:45:54 -0500 | [diff] [blame] | 2763 | /* xattr.c */ |
| 2764 | ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); |
Josef Bacik | 6099afe | 2008-07-24 12:16:03 -0400 | [diff] [blame] | 2765 | |
Chris Mason | edbd8d4 | 2007-12-21 16:27:24 -0500 | [diff] [blame] | 2766 | /* super.c */ |
Christoph Hellwig | edf24ab | 2008-06-10 10:40:29 -0400 | [diff] [blame] | 2767 | int btrfs_parse_options(struct btrfs_root *root, char *options); |
Sage Weil | 6bf13c0 | 2008-06-10 10:07:39 -0400 | [diff] [blame] | 2768 | int btrfs_sync_fs(struct super_block *sb, int wait); |
liubo | acce952 | 2011-01-06 19:30:25 +0800 | [diff] [blame] | 2769 | void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function, |
| 2770 | unsigned int line, int errno); |
| 2771 | |
| 2772 | #define btrfs_std_error(fs_info, errno) \ |
| 2773 | do { \ |
| 2774 | if ((errno)) \ |
| 2775 | __btrfs_std_error((fs_info), __func__, __LINE__, (errno));\ |
| 2776 | } while (0) |
Josef Bacik | 33268ea | 2008-07-24 12:16:36 -0400 | [diff] [blame] | 2777 | |
| 2778 | /* acl.c */ |
Chris Mason | 0eda294 | 2009-10-13 13:50:18 -0400 | [diff] [blame] | 2779 | #ifdef CONFIG_BTRFS_FS_POSIX_ACL |
Christoph Hellwig | 4e34e71 | 2011-07-23 17:37:31 +0200 | [diff] [blame] | 2780 | struct posix_acl *btrfs_get_acl(struct inode *inode, int type); |
Yan, Zheng | f34f57a | 2009-11-12 09:35:27 +0000 | [diff] [blame] | 2781 | int btrfs_init_acl(struct btrfs_trans_handle *trans, |
| 2782 | struct inode *inode, struct inode *dir); |
Josef Bacik | 33268ea | 2008-07-24 12:16:36 -0400 | [diff] [blame] | 2783 | int btrfs_acl_chmod(struct inode *inode); |
Li Zefan | 9b89d95 | 2011-07-14 03:17:39 +0000 | [diff] [blame] | 2784 | #else |
Linus Torvalds | ed8f373 | 2011-08-02 21:14:05 -1000 | [diff] [blame] | 2785 | #define btrfs_get_acl NULL |
Li Zefan | 9b89d95 | 2011-07-14 03:17:39 +0000 | [diff] [blame] | 2786 | static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, |
| 2787 | struct inode *inode, struct inode *dir) |
| 2788 | { |
| 2789 | return 0; |
| 2790 | } |
| 2791 | static inline int btrfs_acl_chmod(struct inode *inode) |
| 2792 | { |
| 2793 | return 0; |
| 2794 | } |
| 2795 | #endif |
Josef Bacik | 0f9dd46 | 2008-09-23 13:14:11 -0400 | [diff] [blame] | 2796 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2797 | /* relocation.c */ |
| 2798 | int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start); |
| 2799 | int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, |
| 2800 | struct btrfs_root *root); |
| 2801 | int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, |
| 2802 | struct btrfs_root *root); |
| 2803 | int btrfs_recover_relocation(struct btrfs_root *root); |
| 2804 | int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); |
Yan, Zheng | 3fd0a55 | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 2805 | void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, |
| 2806 | struct btrfs_root *root, struct extent_buffer *buf, |
| 2807 | struct extent_buffer *cow); |
| 2808 | void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans, |
| 2809 | struct btrfs_pending_snapshot *pending, |
| 2810 | u64 *bytes_to_reserve); |
| 2811 | void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, |
| 2812 | struct btrfs_pending_snapshot *pending); |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 2813 | |
| 2814 | /* scrub.c */ |
| 2815 | 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] | 2816 | struct btrfs_scrub_progress *progress, int readonly); |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 2817 | int btrfs_scrub_pause(struct btrfs_root *root); |
| 2818 | int btrfs_scrub_pause_super(struct btrfs_root *root); |
| 2819 | int btrfs_scrub_continue(struct btrfs_root *root); |
| 2820 | int btrfs_scrub_continue_super(struct btrfs_root *root); |
| 2821 | int btrfs_scrub_cancel(struct btrfs_root *root); |
| 2822 | int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev); |
| 2823 | int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid); |
| 2824 | int btrfs_scrub_progress(struct btrfs_root *root, u64 devid, |
| 2825 | struct btrfs_scrub_progress *progress); |
| 2826 | |
Arne Jansen | 7414a03 | 2011-05-23 14:33:49 +0200 | [diff] [blame] | 2827 | /* reada.c */ |
| 2828 | struct reada_control { |
| 2829 | struct btrfs_root *root; /* tree to prefetch */ |
| 2830 | struct btrfs_key key_start; |
| 2831 | struct btrfs_key key_end; /* exclusive */ |
| 2832 | atomic_t elems; |
| 2833 | struct kref refcnt; |
| 2834 | wait_queue_head_t wait; |
| 2835 | }; |
| 2836 | struct reada_control *btrfs_reada_add(struct btrfs_root *root, |
| 2837 | struct btrfs_key *start, struct btrfs_key *end); |
| 2838 | int btrfs_reada_wait(void *handle); |
| 2839 | void btrfs_reada_detach(void *handle); |
| 2840 | int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb, |
| 2841 | u64 start, int err); |
| 2842 | |
Chris Mason | eb60cea | 2007-02-02 09:18:22 -0500 | [diff] [blame] | 2843 | #endif |