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6cbd5570 CM |
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 | ||
dc17ff8f CM |
19 | #ifndef __BTRFS_CTREE__ |
20 | #define __BTRFS_CTREE__ | |
eb60ceac | 21 | |
6da6abae | 22 | #include <linux/version.h> |
810191ff CM |
23 | #include <linux/mm.h> |
24 | #include <linux/highmem.h> | |
e20d96d6 | 25 | #include <linux/fs.h> |
08607c1b | 26 | #include <linux/workqueue.h> |
58176a96 | 27 | #include <linux/completion.h> |
04160088 | 28 | #include <linux/backing-dev.h> |
479965d6 | 29 | #include <asm/kmap_types.h> |
8ef97622 | 30 | #include "bit-radix.h" |
d1310b2e | 31 | #include "extent_io.h" |
5f39d397 | 32 | #include "extent_map.h" |
e20d96d6 | 33 | |
e089f05c | 34 | struct btrfs_trans_handle; |
79154b1b | 35 | struct btrfs_transaction; |
35b7e476 CM |
36 | extern struct kmem_cache *btrfs_trans_handle_cachep; |
37 | extern struct kmem_cache *btrfs_transaction_cachep; | |
38 | extern struct kmem_cache *btrfs_bit_radix_cachep; | |
2c90e5d6 | 39 | extern struct kmem_cache *btrfs_path_cachep; |
e089f05c | 40 | |
8a4b83cc | 41 | #define BTRFS_MAGIC "_B5RfS_M" |
eb60ceac | 42 | |
f6dbff55 | 43 | #define BTRFS_MAX_LEVEL 8 |
0b86a832 CM |
44 | |
45 | /* holds pointers to all of the tree roots */ | |
6407bf6d | 46 | #define BTRFS_ROOT_TREE_OBJECTID 1ULL |
0b86a832 CM |
47 | |
48 | /* stores information about which extents are in use, and reference counts */ | |
0cf6c620 | 49 | #define BTRFS_EXTENT_TREE_OBJECTID 2ULL |
0b86a832 | 50 | |
0b86a832 CM |
51 | /* |
52 | * chunk tree stores translations from logical -> physical block numbering | |
53 | * the super block points to the chunk tree | |
54 | */ | |
e085def2 | 55 | #define BTRFS_CHUNK_TREE_OBJECTID 3ULL |
0b86a832 CM |
56 | |
57 | /* | |
58 | * stores information about which areas of a given device are in use. | |
59 | * one per device. The tree of tree roots points to the device tree | |
60 | */ | |
e085def2 CM |
61 | #define BTRFS_DEV_TREE_OBJECTID 4ULL |
62 | ||
63 | /* one per subvolume, storing files and directories */ | |
64 | #define BTRFS_FS_TREE_OBJECTID 5ULL | |
65 | ||
66 | /* directory objectid inside the root tree */ | |
67 | #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL | |
0b86a832 CM |
68 | |
69 | /* | |
70 | * All files have objectids higher than this. | |
71 | */ | |
f6dbff55 | 72 | #define BTRFS_FIRST_FREE_OBJECTID 256ULL |
e17cade2 | 73 | #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL |
3768f368 | 74 | |
0b86a832 CM |
75 | |
76 | /* | |
77 | * the device items go into the chunk tree. The key is in the form | |
78 | * [ 1 BTRFS_DEV_ITEM_KEY device_id ] | |
79 | */ | |
80 | #define BTRFS_DEV_ITEMS_OBJECTID 1ULL | |
81 | ||
e20d96d6 CM |
82 | /* |
83 | * we can actually store much bigger names, but lets not confuse the rest | |
84 | * of linux | |
85 | */ | |
86 | #define BTRFS_NAME_LEN 255 | |
87 | ||
f254e52c CM |
88 | /* 32 bytes in various csum fields */ |
89 | #define BTRFS_CSUM_SIZE 32 | |
509659cd CM |
90 | /* four bytes for CRC32 */ |
91 | #define BTRFS_CRC32_SIZE 4 | |
3954401f | 92 | #define BTRFS_EMPTY_DIR_SIZE 0 |
f254e52c | 93 | |
fabb5681 CM |
94 | #define BTRFS_FT_UNKNOWN 0 |
95 | #define BTRFS_FT_REG_FILE 1 | |
96 | #define BTRFS_FT_DIR 2 | |
97 | #define BTRFS_FT_CHRDEV 3 | |
98 | #define BTRFS_FT_BLKDEV 4 | |
99 | #define BTRFS_FT_FIFO 5 | |
100 | #define BTRFS_FT_SOCK 6 | |
101 | #define BTRFS_FT_SYMLINK 7 | |
5103e947 JB |
102 | #define BTRFS_FT_XATTR 8 |
103 | #define BTRFS_FT_MAX 9 | |
fabb5681 | 104 | |
fec577fb CM |
105 | /* |
106 | * the key defines the order in the tree, and so it also defines (optimal) | |
107 | * block layout. objectid corresonds to the inode number. The flags | |
108 | * tells us things about the object, and is a kind of stream selector. | |
109 | * so for a given inode, keys with flags of 1 might refer to the inode | |
110 | * data, flags of 2 may point to file data in the btree and flags == 3 | |
111 | * may point to extents. | |
112 | * | |
113 | * offset is the starting byte offset for this key in the stream. | |
e2fa7227 CM |
114 | * |
115 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always | |
116 | * in cpu native order. Otherwise they are identical and their sizes | |
117 | * should be the same (ie both packed) | |
fec577fb | 118 | */ |
e2fa7227 CM |
119 | struct btrfs_disk_key { |
120 | __le64 objectid; | |
5f39d397 | 121 | u8 type; |
70b2befd | 122 | __le64 offset; |
e2fa7227 CM |
123 | } __attribute__ ((__packed__)); |
124 | ||
125 | struct btrfs_key { | |
eb60ceac | 126 | u64 objectid; |
5f39d397 | 127 | u8 type; |
70b2befd | 128 | u64 offset; |
eb60ceac CM |
129 | } __attribute__ ((__packed__)); |
130 | ||
0b86a832 CM |
131 | struct btrfs_mapping_tree { |
132 | struct extent_map_tree map_tree; | |
133 | }; | |
134 | ||
e17cade2 | 135 | #define BTRFS_UUID_SIZE 16 |
0b86a832 CM |
136 | struct btrfs_dev_item { |
137 | /* the internal btrfs device id */ | |
138 | __le64 devid; | |
139 | ||
140 | /* size of the device */ | |
141 | __le64 total_bytes; | |
142 | ||
143 | /* bytes used */ | |
144 | __le64 bytes_used; | |
145 | ||
146 | /* optimal io alignment for this device */ | |
147 | __le32 io_align; | |
148 | ||
149 | /* optimal io width for this device */ | |
150 | __le32 io_width; | |
151 | ||
152 | /* minimal io size for this device */ | |
153 | __le32 sector_size; | |
154 | ||
0b86a832 CM |
155 | /* type and info about this device */ |
156 | __le64 type; | |
157 | ||
e17cade2 CM |
158 | /* grouping information for allocation decisions */ |
159 | __le32 dev_group; | |
160 | ||
161 | /* seek speed 0-100 where 100 is fastest */ | |
162 | u8 seek_speed; | |
163 | ||
164 | /* bandwidth 0-100 where 100 is fastest */ | |
165 | u8 bandwidth; | |
166 | ||
0d81ba5d | 167 | /* btrfs generated uuid for this device */ |
e17cade2 | 168 | u8 uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
169 | } __attribute__ ((__packed__)); |
170 | ||
171 | struct btrfs_stripe { | |
172 | __le64 devid; | |
173 | __le64 offset; | |
e17cade2 | 174 | u8 dev_uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
175 | } __attribute__ ((__packed__)); |
176 | ||
177 | struct btrfs_chunk { | |
e17cade2 CM |
178 | /* size of this chunk in bytes */ |
179 | __le64 length; | |
180 | ||
181 | /* objectid of the root referencing this chunk */ | |
0b86a832 | 182 | __le64 owner; |
e17cade2 | 183 | |
0b86a832 CM |
184 | __le64 stripe_len; |
185 | __le64 type; | |
186 | ||
187 | /* optimal io alignment for this chunk */ | |
188 | __le32 io_align; | |
189 | ||
190 | /* optimal io width for this chunk */ | |
191 | __le32 io_width; | |
192 | ||
193 | /* minimal io size for this chunk */ | |
194 | __le32 sector_size; | |
195 | ||
196 | /* 2^16 stripes is quite a lot, a second limit is the size of a single | |
197 | * item in the btree | |
198 | */ | |
199 | __le16 num_stripes; | |
200 | struct btrfs_stripe stripe; | |
201 | /* additional stripes go here */ | |
202 | } __attribute__ ((__packed__)); | |
203 | ||
204 | static inline unsigned long btrfs_chunk_item_size(int num_stripes) | |
205 | { | |
206 | BUG_ON(num_stripes == 0); | |
207 | return sizeof(struct btrfs_chunk) + | |
208 | sizeof(struct btrfs_stripe) * (num_stripes - 1); | |
209 | } | |
210 | ||
5f39d397 | 211 | #define BTRFS_FSID_SIZE 16 |
63b10fc4 CM |
212 | #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0) |
213 | ||
fec577fb CM |
214 | /* |
215 | * every tree block (leaf or node) starts with this header. | |
216 | */ | |
bb492bb0 | 217 | struct btrfs_header { |
e17cade2 | 218 | /* these first four must match the super block */ |
f254e52c | 219 | u8 csum[BTRFS_CSUM_SIZE]; |
5f39d397 | 220 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
db94535d | 221 | __le64 bytenr; /* which block this node is supposed to live in */ |
63b10fc4 | 222 | __le64 flags; |
e17cade2 CM |
223 | |
224 | /* allowed to be different from the super from here on down */ | |
225 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; | |
7f5c1516 | 226 | __le64 generation; |
4d775673 | 227 | __le64 owner; |
5f39d397 | 228 | __le32 nritems; |
9a6f11ed | 229 | u8 level; |
eb60ceac CM |
230 | } __attribute__ ((__packed__)); |
231 | ||
5f39d397 | 232 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ |
123abc88 | 233 | sizeof(struct btrfs_header)) / \ |
74493f7a | 234 | sizeof(struct btrfs_key_ptr)) |
123abc88 | 235 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
5f39d397 | 236 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) |
236454df CM |
237 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
238 | sizeof(struct btrfs_item) - \ | |
239 | sizeof(struct btrfs_file_extent_item)) | |
eb60ceac | 240 | |
0b86a832 CM |
241 | |
242 | /* | |
243 | * this is a very generous portion of the super block, giving us | |
244 | * room to translate 14 chunks with 3 stripes each. | |
245 | */ | |
246 | #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 | |
247 | ||
fec577fb CM |
248 | /* |
249 | * the super block basically lists the main trees of the FS | |
250 | * it currently lacks any block count etc etc | |
251 | */ | |
234b63a0 | 252 | struct btrfs_super_block { |
f254e52c | 253 | u8 csum[BTRFS_CSUM_SIZE]; |
63b10fc4 | 254 | /* the first 4 fields must match struct btrfs_header */ |
3768f368 | 255 | u8 fsid[16]; /* FS specific uuid */ |
db94535d | 256 | __le64 bytenr; /* this block number */ |
63b10fc4 | 257 | __le64 flags; |
e17cade2 CM |
258 | |
259 | /* allowed to be different from the btrfs_header from here own down */ | |
3768f368 | 260 | __le64 magic; |
3768f368 CM |
261 | __le64 generation; |
262 | __le64 root; | |
0b86a832 | 263 | __le64 chunk_root; |
db94535d CM |
264 | __le64 total_bytes; |
265 | __le64 bytes_used; | |
2e635a27 | 266 | __le64 root_dir_objectid; |
8a4b83cc | 267 | __le64 num_devices; |
5f39d397 CM |
268 | __le32 sectorsize; |
269 | __le32 nodesize; | |
270 | __le32 leafsize; | |
87ee04eb | 271 | __le32 stripesize; |
0b86a832 | 272 | __le32 sys_chunk_array_size; |
db94535d | 273 | u8 root_level; |
0b86a832 | 274 | u8 chunk_root_level; |
0d81ba5d | 275 | struct btrfs_dev_item dev_item; |
0b86a832 | 276 | u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; |
cfaa7295 CM |
277 | } __attribute__ ((__packed__)); |
278 | ||
fec577fb | 279 | /* |
62e2749e | 280 | * A leaf is full of items. offset and size tell us where to find |
fec577fb CM |
281 | * the item in the leaf (relative to the start of the data area) |
282 | */ | |
0783fcfc | 283 | struct btrfs_item { |
e2fa7227 | 284 | struct btrfs_disk_key key; |
123abc88 | 285 | __le32 offset; |
5f39d397 | 286 | __le32 size; |
eb60ceac CM |
287 | } __attribute__ ((__packed__)); |
288 | ||
fec577fb CM |
289 | /* |
290 | * leaves have an item area and a data area: | |
291 | * [item0, item1....itemN] [free space] [dataN...data1, data0] | |
292 | * | |
293 | * The data is separate from the items to get the keys closer together | |
294 | * during searches. | |
295 | */ | |
234b63a0 | 296 | struct btrfs_leaf { |
bb492bb0 | 297 | struct btrfs_header header; |
123abc88 | 298 | struct btrfs_item items[]; |
eb60ceac CM |
299 | } __attribute__ ((__packed__)); |
300 | ||
fec577fb CM |
301 | /* |
302 | * all non-leaf blocks are nodes, they hold only keys and pointers to | |
303 | * other blocks | |
304 | */ | |
123abc88 CM |
305 | struct btrfs_key_ptr { |
306 | struct btrfs_disk_key key; | |
307 | __le64 blockptr; | |
74493f7a | 308 | __le64 generation; |
123abc88 CM |
309 | } __attribute__ ((__packed__)); |
310 | ||
234b63a0 | 311 | struct btrfs_node { |
bb492bb0 | 312 | struct btrfs_header header; |
123abc88 | 313 | struct btrfs_key_ptr ptrs[]; |
eb60ceac CM |
314 | } __attribute__ ((__packed__)); |
315 | ||
fec577fb | 316 | /* |
234b63a0 CM |
317 | * btrfs_paths remember the path taken from the root down to the leaf. |
318 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point | |
fec577fb CM |
319 | * to any other levels that are present. |
320 | * | |
321 | * The slots array records the index of the item or block pointer | |
322 | * used while walking the tree. | |
323 | */ | |
234b63a0 | 324 | struct btrfs_path { |
5f39d397 | 325 | struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; |
234b63a0 | 326 | int slots[BTRFS_MAX_LEVEL]; |
3c69faec | 327 | int reada; |
6702ed49 | 328 | int lowest_level; |
eb60ceac | 329 | }; |
5de08d7d | 330 | |
62e2749e CM |
331 | /* |
332 | * items in the extent btree are used to record the objectid of the | |
333 | * owner of the block and the number of references | |
334 | */ | |
335 | struct btrfs_extent_item { | |
336 | __le32 refs; | |
74493f7a CM |
337 | } __attribute__ ((__packed__)); |
338 | ||
339 | struct btrfs_extent_ref { | |
340 | __le64 root; | |
341 | __le64 generation; | |
342 | __le64 objectid; | |
343 | __le64 offset; | |
62e2749e CM |
344 | } __attribute__ ((__packed__)); |
345 | ||
0b86a832 CM |
346 | /* dev extents record free space on individual devices. The owner |
347 | * field points back to the chunk allocation mapping tree that allocated | |
e17cade2 | 348 | * the extent. The chunk tree uuid field is a way to double check the owner |
0b86a832 CM |
349 | */ |
350 | struct btrfs_dev_extent { | |
e17cade2 CM |
351 | __le64 chunk_tree; |
352 | __le64 chunk_objectid; | |
353 | __le64 chunk_offset; | |
0b86a832 | 354 | __le64 length; |
e17cade2 | 355 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
356 | } __attribute__ ((__packed__)); |
357 | ||
3954401f CM |
358 | struct btrfs_inode_ref { |
359 | __le16 name_len; | |
360 | /* name goes here */ | |
361 | } __attribute__ ((__packed__)); | |
362 | ||
0b86a832 | 363 | struct btrfs_timespec { |
f254e52c | 364 | __le64 sec; |
1e1d2701 CM |
365 | __le32 nsec; |
366 | } __attribute__ ((__packed__)); | |
367 | ||
368 | /* | |
369 | * there is no padding here on purpose. If you want to extent the inode, | |
370 | * make a new item type | |
371 | */ | |
372 | struct btrfs_inode_item { | |
373 | __le64 generation; | |
374 | __le64 size; | |
375 | __le64 nblocks; | |
31f3c99b | 376 | __le64 block_group; |
1e1d2701 CM |
377 | __le32 nlink; |
378 | __le32 uid; | |
379 | __le32 gid; | |
380 | __le32 mode; | |
0b86a832 | 381 | __le64 rdev; |
1e1d2701 CM |
382 | __le16 flags; |
383 | __le16 compat_flags; | |
0b86a832 CM |
384 | struct btrfs_timespec atime; |
385 | struct btrfs_timespec ctime; | |
386 | struct btrfs_timespec mtime; | |
387 | struct btrfs_timespec otime; | |
1e1d2701 CM |
388 | } __attribute__ ((__packed__)); |
389 | ||
62e2749e | 390 | struct btrfs_dir_item { |
d6e4a428 | 391 | struct btrfs_disk_key location; |
5103e947 | 392 | __le16 data_len; |
a8a2ee0c | 393 | __le16 name_len; |
62e2749e CM |
394 | u8 type; |
395 | } __attribute__ ((__packed__)); | |
396 | ||
397 | struct btrfs_root_item { | |
d6e4a428 CM |
398 | struct btrfs_inode_item inode; |
399 | __le64 root_dirid; | |
db94535d CM |
400 | __le64 bytenr; |
401 | __le64 byte_limit; | |
402 | __le64 bytes_used; | |
5eda7b5e | 403 | __le32 flags; |
62e2749e | 404 | __le32 refs; |
5eda7b5e CM |
405 | struct btrfs_disk_key drop_progress; |
406 | u8 drop_level; | |
db94535d | 407 | u8 level; |
9f5fae2f | 408 | } __attribute__ ((__packed__)); |
62e2749e | 409 | |
236454df CM |
410 | #define BTRFS_FILE_EXTENT_REG 0 |
411 | #define BTRFS_FILE_EXTENT_INLINE 1 | |
412 | ||
9f5fae2f | 413 | struct btrfs_file_extent_item { |
71951f35 | 414 | __le64 generation; |
236454df | 415 | u8 type; |
9f5fae2f CM |
416 | /* |
417 | * disk space consumed by the extent, checksum blocks are included | |
418 | * in these numbers | |
419 | */ | |
db94535d CM |
420 | __le64 disk_bytenr; |
421 | __le64 disk_num_bytes; | |
9f5fae2f | 422 | /* |
dee26a9f | 423 | * the logical offset in file blocks (no csums) |
9f5fae2f CM |
424 | * this extent record is for. This allows a file extent to point |
425 | * into the middle of an existing extent on disk, sharing it | |
426 | * between two snapshots (useful if some bytes in the middle of the | |
427 | * extent have changed | |
428 | */ | |
429 | __le64 offset; | |
430 | /* | |
431 | * the logical number of file blocks (no csums included) | |
432 | */ | |
db94535d | 433 | __le64 num_bytes; |
9f5fae2f CM |
434 | } __attribute__ ((__packed__)); |
435 | ||
f254e52c | 436 | struct btrfs_csum_item { |
509659cd | 437 | u8 csum; |
f254e52c CM |
438 | } __attribute__ ((__packed__)); |
439 | ||
0b86a832 CM |
440 | /* different types of block groups (and chunks) */ |
441 | #define BTRFS_BLOCK_GROUP_DATA (1 << 0) | |
442 | #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1) | |
443 | #define BTRFS_BLOCK_GROUP_METADATA (1 << 2) | |
593060d7 | 444 | #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3) |
8790d502 | 445 | #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4) |
611f0e00 | 446 | #define BTRFS_BLOCK_GROUP_DUP (1 << 5) |
1e2677e0 | 447 | |
f84a8b36 | 448 | |
9078a3e1 CM |
449 | struct btrfs_block_group_item { |
450 | __le64 used; | |
0b86a832 CM |
451 | __le64 chunk_objectid; |
452 | __le64 flags; | |
9078a3e1 CM |
453 | } __attribute__ ((__packed__)); |
454 | ||
6324fbf3 CM |
455 | struct btrfs_space_info { |
456 | u64 flags; | |
457 | u64 total_bytes; | |
458 | u64 bytes_used; | |
459 | u64 bytes_pinned; | |
460 | int full; | |
461 | struct list_head list; | |
462 | }; | |
463 | ||
9078a3e1 CM |
464 | struct btrfs_block_group_cache { |
465 | struct btrfs_key key; | |
466 | struct btrfs_block_group_item item; | |
6324fbf3 | 467 | struct btrfs_space_info *space_info; |
324ae4df | 468 | u64 pinned; |
0b86a832 CM |
469 | u64 flags; |
470 | int cached; | |
9078a3e1 | 471 | }; |
0b86a832 CM |
472 | |
473 | struct btrfs_device; | |
8a4b83cc | 474 | struct btrfs_fs_devices; |
9f5fae2f | 475 | struct btrfs_fs_info { |
5f39d397 | 476 | u8 fsid[BTRFS_FSID_SIZE]; |
e17cade2 | 477 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
62e2749e CM |
478 | struct btrfs_root *extent_root; |
479 | struct btrfs_root *tree_root; | |
0b86a832 CM |
480 | struct btrfs_root *chunk_root; |
481 | struct btrfs_root *dev_root; | |
0f7d52f4 | 482 | struct radix_tree_root fs_roots_radix; |
1a5bc167 | 483 | |
d1310b2e CM |
484 | struct extent_io_tree free_space_cache; |
485 | struct extent_io_tree block_group_cache; | |
486 | struct extent_io_tree pinned_extents; | |
487 | struct extent_io_tree pending_del; | |
488 | struct extent_io_tree extent_ins; | |
1a5bc167 | 489 | |
0b86a832 CM |
490 | /* logical->physical extent mapping */ |
491 | struct btrfs_mapping_tree mapping_tree; | |
492 | ||
293ffd5f | 493 | u64 generation; |
15ee9bc7 | 494 | u64 last_trans_committed; |
b6cda9bc | 495 | unsigned long mount_opt; |
c59f8951 | 496 | u64 max_extent; |
6f568d35 | 497 | u64 max_inline; |
8f662a76 | 498 | u64 alloc_start; |
79154b1b | 499 | struct btrfs_transaction *running_transaction; |
4b52dff6 | 500 | struct btrfs_super_block super_copy; |
5f39d397 | 501 | struct extent_buffer *sb_buffer; |
0b86a832 | 502 | struct block_device *__bdev; |
e20d96d6 | 503 | struct super_block *sb; |
d98237b3 | 504 | struct inode *btree_inode; |
04160088 | 505 | struct backing_dev_info bdi; |
19c00ddc | 506 | spinlock_t hash_lock; |
79154b1b | 507 | struct mutex trans_mutex; |
d561c025 | 508 | struct mutex fs_mutex; |
8fd17795 | 509 | struct list_head trans_list; |
19c00ddc | 510 | struct list_head hashers; |
facda1e7 | 511 | struct list_head dead_roots; |
ce9adaa5 CM |
512 | struct list_head end_io_work_list; |
513 | struct work_struct end_io_work; | |
514 | spinlock_t end_io_work_lock; | |
515 | ||
6da6abae CM |
516 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18) |
517 | struct work_struct trans_work; | |
518 | #else | |
08607c1b | 519 | struct delayed_work trans_work; |
6da6abae | 520 | #endif |
58176a96 JB |
521 | struct kobject super_kobj; |
522 | struct completion kobj_unregister; | |
e66f709b | 523 | int do_barriers; |
facda1e7 | 524 | int closing; |
e2008b61 | 525 | unsigned long throttles; |
9f5fae2f | 526 | |
324ae4df | 527 | u64 total_pinned; |
0b86a832 CM |
528 | struct list_head dirty_cowonly_roots; |
529 | ||
8a4b83cc | 530 | struct btrfs_fs_devices *fs_devices; |
6324fbf3 | 531 | struct list_head space_info; |
1832a6d5 | 532 | spinlock_t delalloc_lock; |
cee36a03 | 533 | spinlock_t new_trans_lock; |
1832a6d5 | 534 | u64 delalloc_bytes; |
e18e4809 | 535 | u64 last_alloc; |
4529ba49 | 536 | u64 last_data_alloc; |
d18a2c44 CM |
537 | |
538 | u64 avail_data_alloc_bits; | |
539 | u64 avail_metadata_alloc_bits; | |
540 | u64 avail_system_alloc_bits; | |
541 | u64 data_alloc_profile; | |
542 | u64 metadata_alloc_profile; | |
543 | u64 system_alloc_profile; | |
324ae4df | 544 | }; |
0b86a832 | 545 | |
9f5fae2f CM |
546 | /* |
547 | * in ram representation of the tree. extent_root is used for all allocations | |
f2458e1d | 548 | * and for the extent tree extent_root root. |
9f5fae2f CM |
549 | */ |
550 | struct btrfs_root { | |
5f39d397 CM |
551 | struct extent_buffer *node; |
552 | struct extent_buffer *commit_root; | |
62e2749e CM |
553 | struct btrfs_root_item root_item; |
554 | struct btrfs_key root_key; | |
9f5fae2f | 555 | struct btrfs_fs_info *fs_info; |
0f7d52f4 | 556 | struct inode *inode; |
58176a96 JB |
557 | struct kobject root_kobj; |
558 | struct completion kobj_unregister; | |
0f7d52f4 CM |
559 | u64 objectid; |
560 | u64 last_trans; | |
5f39d397 CM |
561 | |
562 | /* data allocations are done in sectorsize units */ | |
563 | u32 sectorsize; | |
564 | ||
565 | /* node allocations are done in nodesize units */ | |
566 | u32 nodesize; | |
567 | ||
568 | /* leaf allocations are done in leafsize units */ | |
569 | u32 leafsize; | |
570 | ||
87ee04eb CM |
571 | u32 stripesize; |
572 | ||
9f5fae2f | 573 | u32 type; |
1b05da2e CM |
574 | u64 highest_inode; |
575 | u64 last_inode_alloc; | |
9f3a7427 | 576 | int ref_cows; |
0b86a832 | 577 | int track_dirty; |
6702ed49 CM |
578 | struct btrfs_key defrag_progress; |
579 | int defrag_running; | |
580 | int defrag_level; | |
58176a96 | 581 | char *name; |
4313b399 | 582 | int in_sysfs; |
0b86a832 CM |
583 | |
584 | /* the dirty list is only used by non-reference counted roots */ | |
585 | struct list_head dirty_list; | |
62e2749e CM |
586 | }; |
587 | ||
1e1d2701 | 588 | /* |
0b86a832 | 589 | |
1e1d2701 CM |
590 | * inode items have the data typically returned from stat and store other |
591 | * info about object characteristics. There is one for every file and dir in | |
592 | * the FS | |
593 | */ | |
9078a3e1 | 594 | #define BTRFS_INODE_ITEM_KEY 1 |
3954401f CM |
595 | #define BTRFS_INODE_REF_KEY 2 |
596 | #define BTRFS_XATTR_ITEM_KEY 8 | |
9078a3e1 | 597 | /* reserve 2-15 close to the inode for later flexibility */ |
1e1d2701 CM |
598 | |
599 | /* | |
600 | * dir items are the name -> inode pointers in a directory. There is one | |
601 | * for every name in a directory. | |
602 | */ | |
9078a3e1 CM |
603 | #define BTRFS_DIR_ITEM_KEY 16 |
604 | #define BTRFS_DIR_INDEX_KEY 17 | |
1e1d2701 | 605 | /* |
9078a3e1 | 606 | * extent data is for file data |
1e1d2701 | 607 | */ |
9078a3e1 | 608 | #define BTRFS_EXTENT_DATA_KEY 18 |
f254e52c CM |
609 | /* |
610 | * csum items have the checksums for data in the extents | |
611 | */ | |
9078a3e1 CM |
612 | #define BTRFS_CSUM_ITEM_KEY 19 |
613 | ||
614 | /* reserve 20-31 for other file stuff */ | |
f254e52c | 615 | |
1e1d2701 CM |
616 | /* |
617 | * root items point to tree roots. There are typically in the root | |
618 | * tree used by the super block to find all the other trees | |
619 | */ | |
9078a3e1 | 620 | #define BTRFS_ROOT_ITEM_KEY 32 |
1e1d2701 CM |
621 | /* |
622 | * extent items are in the extent map tree. These record which blocks | |
623 | * are used, and how many references there are to each block | |
624 | */ | |
9078a3e1 | 625 | #define BTRFS_EXTENT_ITEM_KEY 33 |
74493f7a | 626 | #define BTRFS_EXTENT_REF_KEY 34 |
9078a3e1 CM |
627 | |
628 | /* | |
629 | * block groups give us hints into the extent allocation trees. Which | |
630 | * blocks are free etc etc | |
631 | */ | |
74493f7a | 632 | #define BTRFS_BLOCK_GROUP_ITEM_KEY 50 |
9f5fae2f | 633 | |
0b86a832 CM |
634 | #define BTRFS_DEV_EXTENT_KEY 75 |
635 | #define BTRFS_DEV_ITEM_KEY 76 | |
636 | #define BTRFS_CHUNK_ITEM_KEY 77 | |
637 | ||
1e1d2701 CM |
638 | /* |
639 | * string items are for debugging. They just store a short string of | |
640 | * data in the FS | |
641 | */ | |
9078a3e1 CM |
642 | #define BTRFS_STRING_ITEM_KEY 253 |
643 | ||
21ad10cf CM |
644 | #define BTRFS_MOUNT_NODATASUM (1 << 0) |
645 | #define BTRFS_MOUNT_NODATACOW (1 << 1) | |
646 | #define BTRFS_MOUNT_NOBARRIER (1 << 2) | |
e18e4809 | 647 | #define BTRFS_MOUNT_SSD (1 << 3) |
b6cda9bc CM |
648 | |
649 | #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) | |
650 | #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) | |
651 | #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ | |
652 | BTRFS_MOUNT_##opt) | |
b98b6767 Y |
653 | /* |
654 | * Inode flags | |
655 | */ | |
fdebe2bd Y |
656 | #define BTRFS_INODE_NODATASUM (1 << 0) |
657 | #define BTRFS_INODE_NODATACOW (1 << 1) | |
658 | #define BTRFS_INODE_READONLY (1 << 2) | |
b98b6767 Y |
659 | #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \ |
660 | ~BTRFS_INODE_##flag) | |
661 | #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \ | |
662 | BTRFS_INODE_##flag) | |
663 | #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \ | |
664 | BTRFS_INODE_##flag) | |
5f39d397 CM |
665 | /* some macros to generate set/get funcs for the struct fields. This |
666 | * assumes there is a lefoo_to_cpu for every type, so lets make a simple | |
667 | * one for u8: | |
668 | */ | |
669 | #define le8_to_cpu(v) (v) | |
670 | #define cpu_to_le8(v) (v) | |
671 | #define __le8 u8 | |
672 | ||
673 | #define read_eb_member(eb, ptr, type, member, result) ( \ | |
674 | read_extent_buffer(eb, (char *)(result), \ | |
675 | ((unsigned long)(ptr)) + \ | |
676 | offsetof(type, member), \ | |
677 | sizeof(((type *)0)->member))) | |
678 | ||
679 | #define write_eb_member(eb, ptr, type, member, result) ( \ | |
680 | write_extent_buffer(eb, (char *)(result), \ | |
681 | ((unsigned long)(ptr)) + \ | |
682 | offsetof(type, member), \ | |
683 | sizeof(((type *)0)->member))) | |
684 | ||
0f82731f | 685 | #ifndef BTRFS_SETGET_FUNCS |
5f39d397 | 686 | #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ |
0f82731f CM |
687 | u##bits btrfs_##name(struct extent_buffer *eb, type *s); \ |
688 | void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); | |
689 | #endif | |
5f39d397 CM |
690 | |
691 | #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ | |
692 | static inline u##bits btrfs_##name(struct extent_buffer *eb) \ | |
693 | { \ | |
df68b8a7 DM |
694 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
695 | u##bits res = le##bits##_to_cpu(p->member); \ | |
696 | kunmap_atomic(p, KM_USER0); \ | |
810191ff | 697 | return res; \ |
5f39d397 CM |
698 | } \ |
699 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ | |
700 | u##bits val) \ | |
701 | { \ | |
df68b8a7 DM |
702 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
703 | p->member = cpu_to_le##bits(val); \ | |
704 | kunmap_atomic(p, KM_USER0); \ | |
5f39d397 | 705 | } |
9078a3e1 | 706 | |
5f39d397 CM |
707 | #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ |
708 | static inline u##bits btrfs_##name(type *s) \ | |
709 | { \ | |
710 | return le##bits##_to_cpu(s->member); \ | |
711 | } \ | |
712 | static inline void btrfs_set_##name(type *s, u##bits val) \ | |
713 | { \ | |
714 | s->member = cpu_to_le##bits(val); \ | |
1e1d2701 CM |
715 | } |
716 | ||
0b86a832 CM |
717 | BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); |
718 | BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); | |
719 | BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); | |
720 | BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); | |
721 | BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); | |
722 | BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); | |
723 | BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); | |
e17cade2 CM |
724 | BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); |
725 | BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); | |
726 | BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); | |
0b86a832 | 727 | |
8a4b83cc CM |
728 | BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); |
729 | BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, | |
730 | total_bytes, 64); | |
731 | BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, | |
732 | bytes_used, 64); | |
733 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, | |
734 | io_align, 32); | |
735 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, | |
736 | io_width, 32); | |
737 | BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, | |
738 | sector_size, 32); | |
739 | BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); | |
e17cade2 CM |
740 | BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, |
741 | dev_group, 32); | |
742 | BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, | |
743 | seek_speed, 8); | |
744 | BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, | |
745 | bandwidth, 8); | |
8a4b83cc | 746 | |
0b86a832 CM |
747 | static inline char *btrfs_device_uuid(struct btrfs_dev_item *d) |
748 | { | |
749 | return (char *)d + offsetof(struct btrfs_dev_item, uuid); | |
750 | } | |
751 | ||
e17cade2 | 752 | BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); |
0b86a832 CM |
753 | BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); |
754 | BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); | |
755 | BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); | |
756 | BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); | |
757 | BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); | |
758 | BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); | |
759 | BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); | |
760 | BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); | |
761 | BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); | |
762 | ||
e17cade2 CM |
763 | static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) |
764 | { | |
765 | return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); | |
766 | } | |
767 | ||
768 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); | |
0b86a832 CM |
769 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); |
770 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, | |
771 | stripe_len, 64); | |
772 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, | |
773 | io_align, 32); | |
774 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, | |
775 | io_width, 32); | |
776 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, | |
777 | sector_size, 32); | |
778 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); | |
779 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, | |
780 | num_stripes, 16); | |
781 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); | |
782 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); | |
783 | ||
784 | static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, | |
785 | int nr) | |
786 | { | |
787 | unsigned long offset = (unsigned long)c; | |
788 | offset += offsetof(struct btrfs_chunk, stripe); | |
789 | offset += nr * sizeof(struct btrfs_stripe); | |
790 | return (struct btrfs_stripe *)offset; | |
791 | } | |
792 | ||
793 | static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, | |
794 | struct btrfs_chunk *c, int nr) | |
795 | { | |
796 | return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); | |
797 | } | |
798 | ||
799 | static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb, | |
800 | struct btrfs_chunk *c, int nr, | |
801 | u64 val) | |
802 | { | |
803 | btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val); | |
804 | } | |
805 | ||
806 | static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, | |
807 | struct btrfs_chunk *c, int nr) | |
808 | { | |
809 | return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); | |
810 | } | |
811 | ||
812 | static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb, | |
813 | struct btrfs_chunk *c, int nr, | |
814 | u64 val) | |
815 | { | |
816 | btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val); | |
817 | } | |
818 | ||
5f39d397 CM |
819 | /* struct btrfs_block_group_item */ |
820 | BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, | |
821 | used, 64); | |
822 | BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, | |
823 | used, 64); | |
0b86a832 CM |
824 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, |
825 | struct btrfs_block_group_item, chunk_objectid, 64); | |
e17cade2 CM |
826 | |
827 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, | |
0b86a832 CM |
828 | struct btrfs_block_group_item, chunk_objectid, 64); |
829 | BTRFS_SETGET_FUNCS(disk_block_group_flags, | |
830 | struct btrfs_block_group_item, flags, 64); | |
831 | BTRFS_SETGET_STACK_FUNCS(block_group_flags, | |
832 | struct btrfs_block_group_item, flags, 64); | |
1e1d2701 | 833 | |
3954401f CM |
834 | /* struct btrfs_inode_ref */ |
835 | BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); | |
836 | ||
5f39d397 CM |
837 | /* struct btrfs_inode_item */ |
838 | BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); | |
839 | BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); | |
840 | BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64); | |
841 | BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); | |
842 | BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); | |
843 | BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); | |
844 | BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); | |
845 | BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); | |
0b86a832 | 846 | BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); |
5f39d397 CM |
847 | BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16); |
848 | BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item, | |
849 | compat_flags, 16); | |
1e1d2701 | 850 | |
0b86a832 | 851 | static inline struct btrfs_timespec * |
5f39d397 | 852 | btrfs_inode_atime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 853 | { |
5f39d397 CM |
854 | unsigned long ptr = (unsigned long)inode_item; |
855 | ptr += offsetof(struct btrfs_inode_item, atime); | |
0b86a832 | 856 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
857 | } |
858 | ||
0b86a832 | 859 | static inline struct btrfs_timespec * |
5f39d397 | 860 | btrfs_inode_mtime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 861 | { |
5f39d397 CM |
862 | unsigned long ptr = (unsigned long)inode_item; |
863 | ptr += offsetof(struct btrfs_inode_item, mtime); | |
0b86a832 | 864 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
865 | } |
866 | ||
0b86a832 | 867 | static inline struct btrfs_timespec * |
5f39d397 | 868 | btrfs_inode_ctime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 869 | { |
5f39d397 CM |
870 | unsigned long ptr = (unsigned long)inode_item; |
871 | ptr += offsetof(struct btrfs_inode_item, ctime); | |
0b86a832 | 872 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
873 | } |
874 | ||
0b86a832 | 875 | static inline struct btrfs_timespec * |
5f39d397 | 876 | btrfs_inode_otime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 877 | { |
5f39d397 CM |
878 | unsigned long ptr = (unsigned long)inode_item; |
879 | ptr += offsetof(struct btrfs_inode_item, otime); | |
0b86a832 | 880 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
881 | } |
882 | ||
0b86a832 CM |
883 | BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); |
884 | BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); | |
e20d96d6 | 885 | |
5f39d397 CM |
886 | /* struct btrfs_extent_item */ |
887 | BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32); | |
74493f7a | 888 | |
0b86a832 | 889 | /* struct btrfs_dev_extent */ |
e17cade2 CM |
890 | BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, |
891 | chunk_tree, 64); | |
892 | BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, | |
893 | chunk_objectid, 64); | |
894 | BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, | |
895 | chunk_offset, 64); | |
0b86a832 CM |
896 | BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); |
897 | ||
e17cade2 CM |
898 | static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) |
899 | { | |
900 | unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); | |
901 | return (u8 *)((unsigned long)dev + ptr); | |
902 | } | |
903 | ||
74493f7a CM |
904 | /* struct btrfs_extent_ref */ |
905 | BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64); | |
906 | BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64); | |
907 | BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64); | |
908 | BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64); | |
909 | ||
7bb86316 CM |
910 | BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64); |
911 | BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref, | |
74493f7a | 912 | generation, 64); |
7bb86316 CM |
913 | BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref, |
914 | objectid, 64); | |
915 | BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64); | |
e20d96d6 | 916 | |
5f39d397 CM |
917 | BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, |
918 | refs, 32); | |
e20d96d6 | 919 | |
5f39d397 CM |
920 | /* struct btrfs_node */ |
921 | BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); | |
74493f7a | 922 | BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); |
e20d96d6 | 923 | |
5f39d397 | 924 | static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) |
cf27e1ee | 925 | { |
5f39d397 CM |
926 | unsigned long ptr; |
927 | ptr = offsetof(struct btrfs_node, ptrs) + | |
928 | sizeof(struct btrfs_key_ptr) * nr; | |
929 | return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); | |
cf27e1ee CM |
930 | } |
931 | ||
5f39d397 CM |
932 | static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, |
933 | int nr, u64 val) | |
cf27e1ee | 934 | { |
5f39d397 CM |
935 | unsigned long ptr; |
936 | ptr = offsetof(struct btrfs_node, ptrs) + | |
937 | sizeof(struct btrfs_key_ptr) * nr; | |
938 | btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); | |
cf27e1ee CM |
939 | } |
940 | ||
74493f7a CM |
941 | static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) |
942 | { | |
943 | unsigned long ptr; | |
944 | ptr = offsetof(struct btrfs_node, ptrs) + | |
945 | sizeof(struct btrfs_key_ptr) * nr; | |
946 | return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); | |
947 | } | |
948 | ||
949 | static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, | |
950 | int nr, u64 val) | |
951 | { | |
952 | unsigned long ptr; | |
953 | ptr = offsetof(struct btrfs_node, ptrs) + | |
954 | sizeof(struct btrfs_key_ptr) * nr; | |
955 | btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); | |
956 | } | |
957 | ||
810191ff | 958 | static inline unsigned long btrfs_node_key_ptr_offset(int nr) |
4d775673 | 959 | { |
5f39d397 CM |
960 | return offsetof(struct btrfs_node, ptrs) + |
961 | sizeof(struct btrfs_key_ptr) * nr; | |
4d775673 CM |
962 | } |
963 | ||
e644d021 CM |
964 | void btrfs_node_key(struct extent_buffer *eb, |
965 | struct btrfs_disk_key *disk_key, int nr); | |
966 | ||
5f39d397 CM |
967 | static inline void btrfs_set_node_key(struct extent_buffer *eb, |
968 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f8a0c | 969 | { |
5f39d397 CM |
970 | unsigned long ptr; |
971 | ptr = btrfs_node_key_ptr_offset(nr); | |
972 | write_eb_member(eb, (struct btrfs_key_ptr *)ptr, | |
973 | struct btrfs_key_ptr, key, disk_key); | |
1d4f8a0c CM |
974 | } |
975 | ||
5f39d397 CM |
976 | /* struct btrfs_item */ |
977 | BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); | |
978 | BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); | |
4d775673 | 979 | |
5f39d397 | 980 | static inline unsigned long btrfs_item_nr_offset(int nr) |
1d4f8a0c | 981 | { |
5f39d397 CM |
982 | return offsetof(struct btrfs_leaf, items) + |
983 | sizeof(struct btrfs_item) * nr; | |
1d4f8a0c CM |
984 | } |
985 | ||
5f39d397 CM |
986 | static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb, |
987 | int nr) | |
0783fcfc | 988 | { |
5f39d397 | 989 | return (struct btrfs_item *)btrfs_item_nr_offset(nr); |
0783fcfc CM |
990 | } |
991 | ||
5f39d397 CM |
992 | static inline u32 btrfs_item_end(struct extent_buffer *eb, |
993 | struct btrfs_item *item) | |
0783fcfc | 994 | { |
5f39d397 | 995 | return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); |
0783fcfc CM |
996 | } |
997 | ||
5f39d397 | 998 | static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 999 | { |
5f39d397 | 1000 | return btrfs_item_end(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1001 | } |
1002 | ||
5f39d397 | 1003 | static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 1004 | { |
5f39d397 | 1005 | return btrfs_item_offset(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1006 | } |
1007 | ||
5f39d397 | 1008 | static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 1009 | { |
5f39d397 | 1010 | return btrfs_item_size(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1011 | } |
1012 | ||
5f39d397 CM |
1013 | static inline void btrfs_item_key(struct extent_buffer *eb, |
1014 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 1015 | { |
5f39d397 CM |
1016 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
1017 | read_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
1018 | } |
1019 | ||
5f39d397 CM |
1020 | static inline void btrfs_set_item_key(struct extent_buffer *eb, |
1021 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 1022 | { |
5f39d397 CM |
1023 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
1024 | write_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
1025 | } |
1026 | ||
5f39d397 | 1027 | /* struct btrfs_dir_item */ |
5103e947 | 1028 | BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); |
5f39d397 CM |
1029 | BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); |
1030 | BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); | |
1d4f6404 | 1031 | |
5f39d397 CM |
1032 | static inline void btrfs_dir_item_key(struct extent_buffer *eb, |
1033 | struct btrfs_dir_item *item, | |
1034 | struct btrfs_disk_key *key) | |
1d4f6404 | 1035 | { |
5f39d397 | 1036 | read_eb_member(eb, item, struct btrfs_dir_item, location, key); |
1d4f6404 CM |
1037 | } |
1038 | ||
5f39d397 CM |
1039 | static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, |
1040 | struct btrfs_dir_item *item, | |
1041 | struct btrfs_disk_key *key) | |
a8a2ee0c | 1042 | { |
5f39d397 | 1043 | write_eb_member(eb, item, struct btrfs_dir_item, location, key); |
a8a2ee0c CM |
1044 | } |
1045 | ||
5f39d397 CM |
1046 | /* struct btrfs_disk_key */ |
1047 | BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, | |
1048 | objectid, 64); | |
1049 | BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); | |
1050 | BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); | |
1d4f6404 | 1051 | |
e2fa7227 CM |
1052 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
1053 | struct btrfs_disk_key *disk) | |
1054 | { | |
1055 | cpu->offset = le64_to_cpu(disk->offset); | |
5f39d397 | 1056 | cpu->type = disk->type; |
e2fa7227 CM |
1057 | cpu->objectid = le64_to_cpu(disk->objectid); |
1058 | } | |
1059 | ||
1060 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, | |
1061 | struct btrfs_key *cpu) | |
1062 | { | |
1063 | disk->offset = cpu_to_le64(cpu->offset); | |
5f39d397 | 1064 | disk->type = cpu->type; |
e2fa7227 CM |
1065 | disk->objectid = cpu_to_le64(cpu->objectid); |
1066 | } | |
1067 | ||
5f39d397 CM |
1068 | static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, |
1069 | struct btrfs_key *key, int nr) | |
7f5c1516 | 1070 | { |
5f39d397 CM |
1071 | struct btrfs_disk_key disk_key; |
1072 | btrfs_node_key(eb, &disk_key, nr); | |
1073 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
1074 | } |
1075 | ||
5f39d397 CM |
1076 | static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, |
1077 | struct btrfs_key *key, int nr) | |
7f5c1516 | 1078 | { |
5f39d397 CM |
1079 | struct btrfs_disk_key disk_key; |
1080 | btrfs_item_key(eb, &disk_key, nr); | |
1081 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
1082 | } |
1083 | ||
5f39d397 CM |
1084 | static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, |
1085 | struct btrfs_dir_item *item, | |
1086 | struct btrfs_key *key) | |
4d775673 | 1087 | { |
5f39d397 CM |
1088 | struct btrfs_disk_key disk_key; |
1089 | btrfs_dir_item_key(eb, item, &disk_key); | |
1090 | btrfs_disk_key_to_cpu(key, &disk_key); | |
4d775673 CM |
1091 | } |
1092 | ||
58176a96 | 1093 | |
5f39d397 | 1094 | static inline u8 btrfs_key_type(struct btrfs_key *key) |
3768f368 | 1095 | { |
5f39d397 | 1096 | return key->type; |
3768f368 CM |
1097 | } |
1098 | ||
5f39d397 | 1099 | static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) |
3768f368 | 1100 | { |
5f39d397 | 1101 | key->type = val; |
3768f368 CM |
1102 | } |
1103 | ||
5f39d397 | 1104 | /* struct btrfs_header */ |
db94535d | 1105 | BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); |
5f39d397 CM |
1106 | BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, |
1107 | generation, 64); | |
1108 | BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); | |
1109 | BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); | |
63b10fc4 | 1110 | BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); |
5f39d397 | 1111 | BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); |
0f7d52f4 | 1112 | |
63b10fc4 CM |
1113 | static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) |
1114 | { | |
1115 | return (btrfs_header_flags(eb) & flag) == flag; | |
1116 | } | |
1117 | ||
1118 | static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) | |
1119 | { | |
1120 | u64 flags = btrfs_header_flags(eb); | |
1121 | btrfs_set_header_flags(eb, flags | flag); | |
1122 | return (flags & flag) == flag; | |
1123 | } | |
1124 | ||
1125 | static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) | |
1126 | { | |
1127 | u64 flags = btrfs_header_flags(eb); | |
1128 | btrfs_set_header_flags(eb, flags & ~flag); | |
1129 | return (flags & flag) == flag; | |
1130 | } | |
1131 | ||
5f39d397 | 1132 | static inline u8 *btrfs_header_fsid(struct extent_buffer *eb) |
0f7d52f4 | 1133 | { |
5f39d397 CM |
1134 | unsigned long ptr = offsetof(struct btrfs_header, fsid); |
1135 | return (u8 *)ptr; | |
0f7d52f4 CM |
1136 | } |
1137 | ||
e17cade2 CM |
1138 | static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb) |
1139 | { | |
1140 | unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid); | |
1141 | return (u8 *)ptr; | |
1142 | } | |
1143 | ||
5f39d397 | 1144 | static inline u8 *btrfs_super_fsid(struct extent_buffer *eb) |
3768f368 | 1145 | { |
5f39d397 CM |
1146 | unsigned long ptr = offsetof(struct btrfs_super_block, fsid); |
1147 | return (u8 *)ptr; | |
3768f368 CM |
1148 | } |
1149 | ||
5f39d397 | 1150 | static inline u8 *btrfs_header_csum(struct extent_buffer *eb) |
3768f368 | 1151 | { |
5f39d397 CM |
1152 | unsigned long ptr = offsetof(struct btrfs_header, csum); |
1153 | return (u8 *)ptr; | |
3768f368 CM |
1154 | } |
1155 | ||
5f39d397 | 1156 | static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb) |
3768f368 | 1157 | { |
5f39d397 | 1158 | return NULL; |
3768f368 CM |
1159 | } |
1160 | ||
5f39d397 | 1161 | static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb) |
3768f368 | 1162 | { |
5f39d397 | 1163 | return NULL; |
3768f368 CM |
1164 | } |
1165 | ||
5f39d397 | 1166 | static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb) |
3768f368 | 1167 | { |
5f39d397 | 1168 | return NULL; |
3768f368 CM |
1169 | } |
1170 | ||
5f39d397 | 1171 | static inline int btrfs_is_leaf(struct extent_buffer *eb) |
3768f368 | 1172 | { |
5f39d397 | 1173 | return (btrfs_header_level(eb) == 0); |
3768f368 CM |
1174 | } |
1175 | ||
5f39d397 CM |
1176 | /* struct btrfs_root_item */ |
1177 | BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); | |
db94535d CM |
1178 | BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); |
1179 | BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); | |
3768f368 | 1180 | |
db94535d CM |
1181 | BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); |
1182 | BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); | |
5f39d397 CM |
1183 | BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); |
1184 | BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); | |
1185 | BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32); | |
db94535d CM |
1186 | BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); |
1187 | BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); | |
123abc88 | 1188 | |
5f39d397 | 1189 | /* struct btrfs_super_block */ |
db94535d | 1190 | BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); |
5f39d397 CM |
1191 | BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, |
1192 | generation, 64); | |
1193 | BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); | |
0b86a832 CM |
1194 | BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, |
1195 | struct btrfs_super_block, sys_chunk_array_size, 32); | |
db94535d CM |
1196 | BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, |
1197 | root_level, 8); | |
0b86a832 CM |
1198 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, |
1199 | chunk_root, 64); | |
1200 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, | |
1201 | chunk_root_level, 64); | |
db94535d CM |
1202 | BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, |
1203 | total_bytes, 64); | |
1204 | BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, | |
1205 | bytes_used, 64); | |
5f39d397 CM |
1206 | BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, |
1207 | sectorsize, 32); | |
1208 | BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, | |
1209 | nodesize, 32); | |
1210 | BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, | |
1211 | leafsize, 32); | |
87ee04eb CM |
1212 | BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, |
1213 | stripesize, 32); | |
5f39d397 CM |
1214 | BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, |
1215 | root_dir_objectid, 64); | |
8a4b83cc CM |
1216 | BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, |
1217 | num_devices, 64); | |
2e635a27 | 1218 | |
5f39d397 | 1219 | static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) |
2e635a27 | 1220 | { |
5f39d397 | 1221 | return offsetof(struct btrfs_leaf, items); |
2e635a27 CM |
1222 | } |
1223 | ||
5f39d397 CM |
1224 | /* struct btrfs_file_extent_item */ |
1225 | BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); | |
9f5fae2f | 1226 | |
5f39d397 | 1227 | static inline unsigned long btrfs_file_extent_inline_start(struct |
236454df CM |
1228 | btrfs_file_extent_item *e) |
1229 | { | |
5f39d397 | 1230 | unsigned long offset = (unsigned long)e; |
db94535d | 1231 | offset += offsetof(struct btrfs_file_extent_item, disk_bytenr); |
5f39d397 | 1232 | return offset; |
236454df CM |
1233 | } |
1234 | ||
1235 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) | |
1236 | { | |
db94535d | 1237 | return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize; |
9f5fae2f CM |
1238 | } |
1239 | ||
5f39d397 CM |
1240 | static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, |
1241 | struct btrfs_item *e) | |
9f5fae2f | 1242 | { |
5f39d397 | 1243 | unsigned long offset; |
db94535d | 1244 | offset = offsetof(struct btrfs_file_extent_item, disk_bytenr); |
5f39d397 | 1245 | return btrfs_item_size(eb, e) - offset; |
9f5fae2f CM |
1246 | } |
1247 | ||
db94535d CM |
1248 | BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, |
1249 | disk_bytenr, 64); | |
5f39d397 CM |
1250 | BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, |
1251 | generation, 64); | |
db94535d CM |
1252 | BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, |
1253 | disk_num_bytes, 64); | |
5f39d397 CM |
1254 | BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, |
1255 | offset, 64); | |
db94535d CM |
1256 | BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, |
1257 | num_bytes, 64); | |
9f5fae2f | 1258 | |
e20d96d6 CM |
1259 | static inline struct btrfs_root *btrfs_sb(struct super_block *sb) |
1260 | { | |
1261 | return sb->s_fs_info; | |
1262 | } | |
1263 | ||
58176a96 JB |
1264 | static inline int btrfs_set_root_name(struct btrfs_root *root, |
1265 | const char *name, int len) | |
1266 | { | |
1267 | /* if we already have a name just free it */ | |
1268 | if (root->name) | |
1269 | kfree(root->name); | |
1270 | ||
1271 | root->name = kmalloc(len+1, GFP_KERNEL); | |
1272 | if (!root->name) | |
1273 | return -ENOMEM; | |
1274 | ||
1275 | memcpy(root->name, name, len); | |
1276 | root->name[len] ='\0'; | |
1277 | ||
1278 | return 0; | |
1279 | } | |
1280 | ||
db94535d CM |
1281 | static inline u32 btrfs_level_size(struct btrfs_root *root, int level) { |
1282 | if (level == 0) | |
1283 | return root->leafsize; | |
1284 | return root->nodesize; | |
1285 | } | |
1286 | ||
4beb1b8b CM |
1287 | /* helper function to cast into the data area of the leaf. */ |
1288 | #define btrfs_item_ptr(leaf, slot, type) \ | |
123abc88 | 1289 | ((type *)(btrfs_leaf_data(leaf) + \ |
5f39d397 CM |
1290 | btrfs_item_offset_nr(leaf, slot))) |
1291 | ||
1292 | #define btrfs_item_ptr_offset(leaf, slot) \ | |
1293 | ((unsigned long)(btrfs_leaf_data(leaf) + \ | |
1294 | btrfs_item_offset_nr(leaf, slot))) | |
4beb1b8b | 1295 | |
6da6abae CM |
1296 | static inline struct dentry *fdentry(struct file *file) { |
1297 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18) | |
1298 | return file->f_dentry; | |
1299 | #else | |
1300 | return file->f_path.dentry; | |
1301 | #endif | |
1302 | } | |
1303 | ||
b18c6685 | 1304 | /* extent-tree.c */ |
be20aa9d CM |
1305 | u32 btrfs_count_snapshots_in_path(struct btrfs_root *root, |
1306 | struct btrfs_path *count_path, | |
1307 | u64 first_extent); | |
e9d0b13b CM |
1308 | int btrfs_extent_post_op(struct btrfs_trans_handle *trans, |
1309 | struct btrfs_root *root); | |
d1310b2e | 1310 | int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy); |
5276aeda CM |
1311 | struct btrfs_block_group_cache *btrfs_lookup_block_group(struct |
1312 | btrfs_fs_info *info, | |
db94535d | 1313 | u64 bytenr); |
31f3c99b CM |
1314 | struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root, |
1315 | struct btrfs_block_group_cache | |
be744175 | 1316 | *hint, u64 search_start, |
de428b63 | 1317 | int data, int owner); |
c5739bba | 1318 | int btrfs_inc_root_ref(struct btrfs_trans_handle *trans, |
7bb86316 | 1319 | struct btrfs_root *root, u64 owner_objectid); |
5f39d397 | 1320 | struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
db94535d | 1321 | struct btrfs_root *root, u32 size, |
7bb86316 | 1322 | u64 root_objectid, |
db94535d | 1323 | u64 hint, u64 empty_size); |
7bb86316 CM |
1324 | struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
1325 | struct btrfs_root *root, | |
1326 | u32 blocksize, | |
1327 | u64 root_objectid, | |
1328 | u64 ref_generation, | |
1329 | u64 first_objectid, | |
1330 | int level, | |
1331 | u64 hint, | |
1332 | u64 empty_size); | |
edbd8d4e CM |
1333 | int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans, |
1334 | struct btrfs_root *root, u64 new_size); | |
1335 | int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size); | |
7bb86316 CM |
1336 | int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans, |
1337 | struct btrfs_root *root, | |
1338 | struct btrfs_path *path, u64 bytenr, | |
1339 | u64 root_objectid, u64 ref_generation, | |
1340 | u64 owner, u64 owner_offset); | |
4d775673 | 1341 | int btrfs_alloc_extent(struct btrfs_trans_handle *trans, |
7bb86316 | 1342 | struct btrfs_root *root, |
98d20f67 CM |
1343 | u64 num_bytes, u64 min_bytes, |
1344 | u64 root_objectid, u64 ref_generation, | |
7bb86316 CM |
1345 | u64 owner, u64 owner_offset, |
1346 | u64 empty_size, u64 hint_byte, | |
be08c1b9 | 1347 | u64 search_end, struct btrfs_key *ins, int data); |
e089f05c | 1348 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
5f39d397 | 1349 | struct extent_buffer *buf); |
e089f05c | 1350 | int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root |
7bb86316 CM |
1351 | *root, u64 bytenr, u64 num_bytes, |
1352 | u64 root_objectid, u64 ref_generation, | |
1353 | u64 owner_objectid, u64 owner_offset, int pin); | |
ccd467d6 CM |
1354 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, |
1355 | struct btrfs_root *root, | |
d1310b2e | 1356 | struct extent_io_tree *unpin); |
b18c6685 CM |
1357 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
1358 | struct btrfs_root *root, | |
7bb86316 CM |
1359 | u64 bytenr, u64 num_bytes, |
1360 | u64 root_objectid, u64 ref_generation, | |
1361 | u64 owner, u64 owner_offset); | |
9078a3e1 CM |
1362 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, |
1363 | struct btrfs_root *root); | |
1364 | int btrfs_free_block_groups(struct btrfs_fs_info *info); | |
1365 | int btrfs_read_block_groups(struct btrfs_root *root); | |
0b86a832 CM |
1366 | int btrfs_make_block_group(struct btrfs_trans_handle *trans, |
1367 | struct btrfs_root *root, u64 bytes_used, | |
e17cade2 | 1368 | u64 type, u64 chunk_objectid, u64 chunk_offset, |
0b86a832 | 1369 | u64 size); |
dee26a9f | 1370 | /* ctree.c */ |
0b86a832 CM |
1371 | int btrfs_previous_item(struct btrfs_root *root, |
1372 | struct btrfs_path *path, u64 min_objectid, | |
1373 | int type); | |
5f39d397 CM |
1374 | int btrfs_cow_block(struct btrfs_trans_handle *trans, |
1375 | struct btrfs_root *root, struct extent_buffer *buf, | |
1376 | struct extent_buffer *parent, int parent_slot, | |
1377 | struct extent_buffer **cow_ret); | |
be20aa9d CM |
1378 | int btrfs_copy_root(struct btrfs_trans_handle *trans, |
1379 | struct btrfs_root *root, | |
1380 | struct extent_buffer *buf, | |
1381 | struct extent_buffer **cow_ret, u64 new_root_objectid); | |
6567e837 CM |
1382 | int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root |
1383 | *root, struct btrfs_path *path, u32 data_size); | |
b18c6685 CM |
1384 | int btrfs_truncate_item(struct btrfs_trans_handle *trans, |
1385 | struct btrfs_root *root, | |
1386 | struct btrfs_path *path, | |
179e29e4 | 1387 | u32 new_size, int from_end); |
e089f05c CM |
1388 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
1389 | *root, struct btrfs_key *key, struct btrfs_path *p, int | |
1390 | ins_len, int cow); | |
6702ed49 | 1391 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, |
5f39d397 | 1392 | struct btrfs_root *root, struct extent_buffer *parent, |
a6b6e75e CM |
1393 | int start_slot, int cache_only, u64 *last_ret, |
1394 | struct btrfs_key *progress); | |
234b63a0 | 1395 | void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); |
2c90e5d6 CM |
1396 | struct btrfs_path *btrfs_alloc_path(void); |
1397 | void btrfs_free_path(struct btrfs_path *p); | |
234b63a0 | 1398 | void btrfs_init_path(struct btrfs_path *p); |
85e21bac CM |
1399 | int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
1400 | struct btrfs_path *path, int slot, int nr); | |
1401 | ||
1402 | static inline int btrfs_del_item(struct btrfs_trans_handle *trans, | |
1403 | struct btrfs_root *root, | |
1404 | struct btrfs_path *path) | |
1405 | { | |
1406 | return btrfs_del_items(trans, root, path, path->slots[0], 1); | |
1407 | } | |
1408 | ||
e089f05c CM |
1409 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root |
1410 | *root, struct btrfs_key *key, void *data, u32 data_size); | |
9c58309d CM |
1411 | int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, |
1412 | struct btrfs_root *root, | |
1413 | struct btrfs_path *path, | |
1414 | struct btrfs_key *cpu_key, u32 *data_size, int nr); | |
1415 | ||
1416 | static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, | |
1417 | struct btrfs_root *root, | |
1418 | struct btrfs_path *path, | |
1419 | struct btrfs_key *key, | |
1420 | u32 data_size) | |
1421 | { | |
1422 | return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); | |
1423 | } | |
1424 | ||
234b63a0 | 1425 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
7bb86316 | 1426 | int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); |
5f39d397 | 1427 | int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); |
e089f05c | 1428 | int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root |
9f3a7427 | 1429 | *root); |
dee26a9f | 1430 | /* root-item.c */ |
e089f05c CM |
1431 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
1432 | struct btrfs_key *key); | |
1433 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
1434 | *root, struct btrfs_key *key, struct btrfs_root_item | |
1435 | *item); | |
1436 | int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
1437 | *root, struct btrfs_key *key, struct btrfs_root_item | |
1438 | *item); | |
1439 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct | |
1440 | btrfs_root_item *item, struct btrfs_key *key); | |
5ce14bbc CM |
1441 | int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid, |
1442 | struct btrfs_root *latest_root); | |
dee26a9f | 1443 | /* dir-item.c */ |
e089f05c | 1444 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root |
d6e4a428 CM |
1445 | *root, const char *name, int name_len, u64 dir, |
1446 | struct btrfs_key *location, u8 type); | |
7e38180e CM |
1447 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
1448 | struct btrfs_root *root, | |
1449 | struct btrfs_path *path, u64 dir, | |
1450 | const char *name, int name_len, | |
1451 | int mod); | |
1452 | struct btrfs_dir_item * | |
1453 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, | |
1454 | struct btrfs_root *root, | |
1455 | struct btrfs_path *path, u64 dir, | |
1456 | u64 objectid, const char *name, int name_len, | |
1457 | int mod); | |
1458 | struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, | |
1459 | struct btrfs_path *path, | |
7f5c1516 | 1460 | const char *name, int name_len); |
7e38180e CM |
1461 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
1462 | struct btrfs_root *root, | |
1463 | struct btrfs_path *path, | |
1464 | struct btrfs_dir_item *di); | |
5103e947 JB |
1465 | int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, |
1466 | struct btrfs_root *root, const char *name, | |
1467 | u16 name_len, const void *data, u16 data_len, | |
1468 | u64 dir); | |
1469 | struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, | |
1470 | struct btrfs_root *root, | |
1471 | struct btrfs_path *path, u64 dir, | |
1472 | const char *name, u16 name_len, | |
1473 | int mod); | |
dee26a9f | 1474 | /* inode-map.c */ |
9f5fae2f CM |
1475 | int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, |
1476 | struct btrfs_root *fs_root, | |
1477 | u64 dirid, u64 *objectid); | |
5be6f7f1 CM |
1478 | int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); |
1479 | ||
dee26a9f | 1480 | /* inode-item.c */ |
3954401f CM |
1481 | int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, |
1482 | struct btrfs_root *root, | |
1483 | const char *name, int name_len, | |
1484 | u64 inode_objectid, u64 ref_objectid); | |
1485 | int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, | |
1486 | struct btrfs_root *root, | |
1487 | const char *name, int name_len, | |
1488 | u64 inode_objectid, u64 ref_objectid); | |
5f39d397 CM |
1489 | int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, |
1490 | struct btrfs_root *root, | |
1491 | struct btrfs_path *path, u64 objectid); | |
293ffd5f | 1492 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
d6e4a428 CM |
1493 | *root, struct btrfs_path *path, |
1494 | struct btrfs_key *location, int mod); | |
dee26a9f CM |
1495 | |
1496 | /* file-item.c */ | |
b18c6685 | 1497 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
dee26a9f | 1498 | struct btrfs_root *root, |
b18c6685 | 1499 | u64 objectid, u64 pos, u64 offset, |
db94535d CM |
1500 | u64 disk_num_bytes, |
1501 | u64 num_bytes); | |
dee26a9f CM |
1502 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
1503 | struct btrfs_root *root, | |
1504 | struct btrfs_path *path, u64 objectid, | |
db94535d | 1505 | u64 bytenr, int mod); |
065631f6 CM |
1506 | int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, |
1507 | struct btrfs_root *root, struct inode *inode, | |
1508 | struct bio *bio); | |
b18c6685 CM |
1509 | struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, |
1510 | struct btrfs_root *root, | |
1511 | struct btrfs_path *path, | |
1512 | u64 objectid, u64 offset, | |
1513 | int cow); | |
1de037a4 CM |
1514 | int btrfs_csum_truncate(struct btrfs_trans_handle *trans, |
1515 | struct btrfs_root *root, struct btrfs_path *path, | |
1516 | u64 isize); | |
39279cc3 | 1517 | /* inode.c */ |
239b14b3 CM |
1518 | int btrfs_merge_bio_hook(struct page *page, unsigned long offset, |
1519 | size_t size, struct bio *bio); | |
1520 | ||
9069218d CM |
1521 | static inline void dec_i_blocks(struct inode *inode, u64 dec) |
1522 | { | |
1523 | dec = dec >> 9; | |
1524 | if (dec <= inode->i_blocks) | |
1525 | inode->i_blocks -= dec; | |
1526 | else | |
1527 | inode->i_blocks = 0; | |
1528 | } | |
1529 | ||
edbd8d4e CM |
1530 | unsigned long btrfs_force_ra(struct address_space *mapping, |
1531 | struct file_ra_state *ra, struct file *file, | |
1532 | pgoff_t offset, pgoff_t last_index); | |
1832a6d5 CM |
1533 | int btrfs_check_free_space(struct btrfs_root *root, u64 num_required, |
1534 | int for_del); | |
9ebefb18 CM |
1535 | int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page); |
1536 | int btrfs_readpage(struct file *file, struct page *page); | |
39279cc3 | 1537 | void btrfs_delete_inode(struct inode *inode); |
2da98f00 | 1538 | void btrfs_put_inode(struct inode *inode); |
39279cc3 CM |
1539 | void btrfs_read_locked_inode(struct inode *inode); |
1540 | int btrfs_write_inode(struct inode *inode, int wait); | |
1541 | void btrfs_dirty_inode(struct inode *inode); | |
1542 | struct inode *btrfs_alloc_inode(struct super_block *sb); | |
1543 | void btrfs_destroy_inode(struct inode *inode); | |
1544 | int btrfs_init_cachep(void); | |
1545 | void btrfs_destroy_cachep(void); | |
34287aa3 | 1546 | long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
39279cc3 CM |
1547 | struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid, |
1548 | struct btrfs_root *root); | |
dc17ff8f CM |
1549 | struct inode *btrfs_ilookup(struct super_block *s, u64 objectid, |
1550 | u64 root_objectid); | |
39279cc3 CM |
1551 | int btrfs_commit_write(struct file *file, struct page *page, |
1552 | unsigned from, unsigned to); | |
a52d9a80 CM |
1553 | struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, |
1554 | size_t page_offset, u64 start, u64 end, | |
1555 | int create); | |
1556 | int btrfs_update_inode(struct btrfs_trans_handle *trans, | |
1557 | struct btrfs_root *root, | |
1558 | struct inode *inode); | |
39279cc3 | 1559 | /* file.c */ |
a52d9a80 | 1560 | int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end); |
5f56406a | 1561 | int btrfs_check_file(struct btrfs_root *root, struct inode *inode); |
39279cc3 CM |
1562 | extern struct file_operations btrfs_file_operations; |
1563 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, | |
1564 | struct btrfs_root *root, struct inode *inode, | |
00f5c795 | 1565 | u64 start, u64 end, u64 inline_limit, u64 *hint_block); |
6702ed49 CM |
1566 | /* tree-defrag.c */ |
1567 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, | |
1568 | struct btrfs_root *root, int cache_only); | |
58176a96 JB |
1569 | |
1570 | /* sysfs.c */ | |
1571 | int btrfs_init_sysfs(void); | |
1572 | void btrfs_exit_sysfs(void); | |
1573 | int btrfs_sysfs_add_super(struct btrfs_fs_info *fs); | |
1574 | int btrfs_sysfs_add_root(struct btrfs_root *root); | |
1575 | void btrfs_sysfs_del_root(struct btrfs_root *root); | |
1576 | void btrfs_sysfs_del_super(struct btrfs_fs_info *root); | |
1577 | ||
5103e947 JB |
1578 | /* xattr.c */ |
1579 | ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); | |
1580 | int btrfs_delete_xattrs(struct btrfs_trans_handle *trans, | |
1581 | struct btrfs_root *root, struct inode *inode); | |
edbd8d4e CM |
1582 | /* super.c */ |
1583 | u64 btrfs_parse_size(char *str); | |
eb60ceac | 1584 | #endif |