1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * From linux/fs/btrfs/ctree.h
4 * Copyright (C) 2007,2008 Oracle. All rights reserved.
6 * Modified in 2017 by Marek BehĂșn, CZ.NIC, kabel@kernel.org
9 #ifndef __BTRFS_CTREE_H__
10 #define __BTRFS_CTREE_H__
14 #include <linux/rbtree.h>
15 #include <linux/bug.h>
16 #include <asm/unaligned.h>
17 #include <u-boot/crc.h>
18 #include "kernel-shared/btrfs_tree.h"
19 #include "crypto/hash.h"
21 #include "extent-io.h"
23 #define BTRFS_MAX_MIRRORS 3
26 * the max metadata block size. This limit is somewhat artificial,
27 * but the memmove costs go through the roof for larger blocks.
29 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
32 * Theoretical limit is larger, but we keep this down to a sane
33 * value. That should limit greatly the possibility of collisions on
36 #define BTRFS_LINK_MAX 65535U
38 /* four bytes for CRC32 */
39 #define BTRFS_EMPTY_DIR_SIZE 0
41 struct btrfs_mapping_tree {
42 struct cache_tree cache_tree;
45 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
47 BUG_ON(num_stripes == 0);
48 return sizeof(struct btrfs_chunk) +
49 sizeof(struct btrfs_stripe) * (num_stripes - 1);
52 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
53 #define BTRFS_LEAF_DATA_SIZE(fs_info) \
54 (__BTRFS_LEAF_DATA_SIZE(fs_info->nodesize))
57 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
58 int slots[BTRFS_MAX_LEVEL];
60 /* keep some upper locks as we walk down */
64 /* ioprio of readahead is set to idle */
65 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
67 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
69 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
71 enum btrfs_tree_block_status {
72 BTRFS_TREE_BLOCK_CLEAN,
73 BTRFS_TREE_BLOCK_INVALID_NRITEMS,
74 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
75 BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
76 BTRFS_TREE_BLOCK_INVALID_LEVEL,
77 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
78 BTRFS_TREE_BLOCK_INVALID_OFFSETS,
82 struct extent_buffer *node;
83 struct btrfs_root_item root_item;
84 struct btrfs_key root_key;
85 struct btrfs_fs_info *fs_info;
95 struct rb_node rb_node;
98 struct btrfs_trans_handle;
100 struct btrfs_fs_devices;
101 struct btrfs_fs_info {
102 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
103 u8 *new_chunk_tree_uuid;
104 struct btrfs_root *fs_root;
105 struct btrfs_root *tree_root;
106 struct btrfs_root *chunk_root;
107 struct btrfs_root *csum_root;
109 struct rb_root fs_root_tree;
111 struct extent_io_tree extent_cache;
113 /* logical->physical extent mapping */
114 struct btrfs_mapping_tree mapping_tree;
116 u64 last_trans_committed;
118 struct btrfs_super_block *super_copy;
120 struct btrfs_fs_devices *fs_devices;
122 /* Cached block sizes */
128 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
130 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
133 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
135 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
138 static inline u32 BTRFS_NODEPTRS_PER_EXTENT_BUFFER(const struct extent_buffer *eb)
140 BUG_ON(eb->fs_info && eb->fs_info->nodesize != eb->len);
141 return __BTRFS_LEAF_DATA_SIZE(eb->len) / sizeof(struct btrfs_key_ptr);
144 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
145 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
146 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
148 return BTRFS_MAX_ITEM_SIZE(info) -
149 BTRFS_FILE_EXTENT_INLINE_DATA_START;
152 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
154 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
160 #define BTRFS_FS_STATE_ERROR 0
161 #define BTRFS_FS_STATE_REMOUNTING 1
162 #define BTRFS_FS_STATE_TRANS_ABORTED 2
163 #define BTRFS_FS_STATE_DEV_REPLACING 3
164 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4
166 #define read_eb_member(eb, ptr, type, member, result) ( \
167 read_extent_buffer(eb, (char *)(result), \
168 ((unsigned long)(ptr)) + \
169 offsetof(type, member), \
170 sizeof(((type *)0)->member)))
172 #define write_eb_member(eb, ptr, type, member, result) ( \
173 write_extent_buffer(eb, (char *)(result), \
174 ((unsigned long)(ptr)) + \
175 offsetof(type, member), \
176 sizeof(((type *)0)->member)))
178 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
179 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
181 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
182 return le##bits##_to_cpu(h->member); \
184 static inline void btrfs_set_##name(struct extent_buffer *eb, \
187 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
188 h->member = cpu_to_le##bits(val); \
191 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
192 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
195 unsigned long offset = (unsigned long)s; \
196 const type *p = (type *) (eb->data + offset); \
197 return get_unaligned_le##bits(&p->member); \
199 static inline void btrfs_set_##name(struct extent_buffer *eb, \
200 type *s, u##bits val) \
202 unsigned long offset = (unsigned long)s; \
203 type *p = (type *) (eb->data + offset); \
204 put_unaligned_le##bits(val, &p->member); \
207 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
208 static inline u##bits btrfs_##name(const type *s) \
210 return le##bits##_to_cpu(s->member); \
212 static inline void btrfs_set_##name(type *s, u##bits val) \
214 s->member = cpu_to_le##bits(val); \
217 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
218 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
219 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
220 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
221 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
222 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
224 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
225 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
226 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
227 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
228 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
229 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
231 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
232 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
234 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
236 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
238 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
240 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
242 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
243 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
245 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
247 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
249 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
252 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
254 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
257 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
259 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
262 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
263 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
264 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
265 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
266 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
267 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
268 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
269 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
270 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
271 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
272 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
274 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
276 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
279 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
280 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
281 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
283 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
285 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
287 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
289 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
290 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
292 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
294 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
295 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
297 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
300 unsigned long offset = (unsigned long)c;
301 offset += offsetof(struct btrfs_chunk, stripe);
302 offset += nr * sizeof(struct btrfs_stripe);
303 return (struct btrfs_stripe *)offset;
306 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
308 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
311 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
312 struct btrfs_chunk *c, int nr)
314 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
317 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
318 struct btrfs_chunk *c, int nr,
321 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
324 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
325 struct btrfs_chunk *c, int nr)
327 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
330 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
331 struct btrfs_chunk *c, int nr,
334 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
337 /* struct btrfs_block_group_item */
338 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
340 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
342 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
343 struct btrfs_block_group_item, chunk_objectid, 64);
345 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
346 struct btrfs_block_group_item, chunk_objectid, 64);
347 BTRFS_SETGET_FUNCS(disk_block_group_flags,
348 struct btrfs_block_group_item, flags, 64);
349 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
350 struct btrfs_block_group_item, flags, 64);
352 /* struct btrfs_free_space_info */
353 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
355 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
357 /* struct btrfs_inode_ref */
358 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
359 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
360 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
362 /* struct btrfs_inode_extref */
363 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
364 parent_objectid, 64);
365 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
367 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
369 /* struct btrfs_inode_item */
370 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
371 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
372 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
373 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
374 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
375 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
376 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
377 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
378 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
379 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
380 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
381 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
383 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
384 struct btrfs_inode_item, generation, 64);
385 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
386 struct btrfs_inode_item, sequence, 64);
387 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid,
388 struct btrfs_inode_item, transid, 64);
389 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
390 struct btrfs_inode_item, size, 64);
391 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
392 struct btrfs_inode_item, nbytes, 64);
393 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
394 struct btrfs_inode_item, block_group, 64);
395 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
396 struct btrfs_inode_item, nlink, 32);
397 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
398 struct btrfs_inode_item, uid, 32);
399 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
400 struct btrfs_inode_item, gid, 32);
401 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
402 struct btrfs_inode_item, mode, 32);
403 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
404 struct btrfs_inode_item, rdev, 64);
405 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
406 struct btrfs_inode_item, flags, 64);
408 static inline struct btrfs_timespec *
409 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
411 unsigned long ptr = (unsigned long)inode_item;
412 ptr += offsetof(struct btrfs_inode_item, atime);
413 return (struct btrfs_timespec *)ptr;
416 static inline struct btrfs_timespec *
417 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
419 unsigned long ptr = (unsigned long)inode_item;
420 ptr += offsetof(struct btrfs_inode_item, mtime);
421 return (struct btrfs_timespec *)ptr;
424 static inline struct btrfs_timespec *
425 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
427 unsigned long ptr = (unsigned long)inode_item;
428 ptr += offsetof(struct btrfs_inode_item, ctime);
429 return (struct btrfs_timespec *)ptr;
432 static inline struct btrfs_timespec *
433 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
435 unsigned long ptr = (unsigned long)inode_item;
436 ptr += offsetof(struct btrfs_inode_item, otime);
437 return (struct btrfs_timespec *)ptr;
440 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
441 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
442 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
444 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
447 /* struct btrfs_dev_extent */
448 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
450 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
452 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
454 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
456 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent,
459 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
461 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
462 return (u8 *)((unsigned long)dev + ptr);
466 /* struct btrfs_extent_item */
467 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
468 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
469 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
471 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
472 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
474 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
476 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
478 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
479 struct btrfs_tree_block_info *item,
480 struct btrfs_disk_key *key)
482 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
485 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
486 struct btrfs_tree_block_info *item,
487 struct btrfs_disk_key *key)
489 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
492 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
494 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
496 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
498 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
501 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
504 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
506 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
508 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
509 struct btrfs_extent_inline_ref, type, 8);
510 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
511 struct btrfs_extent_inline_ref, offset, 64);
513 static inline u32 btrfs_extent_inline_ref_size(int type)
515 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
516 type == BTRFS_SHARED_BLOCK_REF_KEY)
517 return sizeof(struct btrfs_extent_inline_ref);
518 if (type == BTRFS_SHARED_DATA_REF_KEY)
519 return sizeof(struct btrfs_shared_data_ref) +
520 sizeof(struct btrfs_extent_inline_ref);
521 if (type == BTRFS_EXTENT_DATA_REF_KEY)
522 return sizeof(struct btrfs_extent_data_ref) +
523 offsetof(struct btrfs_extent_inline_ref, offset);
528 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
529 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
531 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
532 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
534 /* struct btrfs_node */
535 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
536 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
538 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
541 ptr = offsetof(struct btrfs_node, ptrs) +
542 sizeof(struct btrfs_key_ptr) * nr;
543 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
546 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
550 ptr = offsetof(struct btrfs_node, ptrs) +
551 sizeof(struct btrfs_key_ptr) * nr;
552 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
555 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
558 ptr = offsetof(struct btrfs_node, ptrs) +
559 sizeof(struct btrfs_key_ptr) * nr;
560 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
563 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
567 ptr = offsetof(struct btrfs_node, ptrs) +
568 sizeof(struct btrfs_key_ptr) * nr;
569 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
572 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
574 return offsetof(struct btrfs_node, ptrs) +
575 sizeof(struct btrfs_key_ptr) * nr;
578 static inline void btrfs_node_key(struct extent_buffer *eb,
579 struct btrfs_disk_key *disk_key, int nr)
582 ptr = btrfs_node_key_ptr_offset(nr);
583 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
584 struct btrfs_key_ptr, key, disk_key);
587 static inline void btrfs_set_node_key(struct extent_buffer *eb,
588 struct btrfs_disk_key *disk_key, int nr)
591 ptr = btrfs_node_key_ptr_offset(nr);
592 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
593 struct btrfs_key_ptr, key, disk_key);
596 /* struct btrfs_item */
597 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
598 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
600 static inline unsigned long btrfs_item_nr_offset(int nr)
602 return offsetof(struct btrfs_leaf, items) +
603 sizeof(struct btrfs_item) * nr;
606 static inline struct btrfs_item *btrfs_item_nr(int nr)
608 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
611 static inline u32 btrfs_item_end(struct extent_buffer *eb,
612 struct btrfs_item *item)
614 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
617 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
619 return btrfs_item_end(eb, btrfs_item_nr(nr));
622 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
624 return btrfs_item_offset(eb, btrfs_item_nr(nr));
627 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
629 return btrfs_item_size(eb, btrfs_item_nr(nr));
632 static inline void btrfs_item_key(struct extent_buffer *eb,
633 struct btrfs_disk_key *disk_key, int nr)
635 struct btrfs_item *item = btrfs_item_nr(nr);
636 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
639 static inline void btrfs_set_item_key(struct extent_buffer *eb,
640 struct btrfs_disk_key *disk_key, int nr)
642 struct btrfs_item *item = btrfs_item_nr(nr);
643 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
646 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
649 * struct btrfs_root_ref
651 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
652 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
653 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
655 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
656 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
657 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
659 /* struct btrfs_dir_item */
660 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
661 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
662 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
663 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
665 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, data_len, 16);
666 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
667 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
668 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, transid, 64);
670 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
671 struct btrfs_dir_item *item,
672 struct btrfs_disk_key *key)
674 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
677 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
678 struct btrfs_dir_item *item,
679 struct btrfs_disk_key *key)
681 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
684 /* struct btrfs_free_space_header */
685 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
687 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
689 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
692 static inline void btrfs_free_space_key(struct extent_buffer *eb,
693 struct btrfs_free_space_header *h,
694 struct btrfs_disk_key *key)
696 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
699 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
700 struct btrfs_free_space_header *h,
701 struct btrfs_disk_key *key)
703 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
706 /* struct btrfs_disk_key */
707 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
709 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
710 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
712 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
713 struct btrfs_disk_key *disk)
715 cpu->offset = le64_to_cpu(disk->offset);
716 cpu->type = disk->type;
717 cpu->objectid = le64_to_cpu(disk->objectid);
720 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
721 const struct btrfs_key *cpu)
723 disk->offset = cpu_to_le64(cpu->offset);
724 disk->type = cpu->type;
725 disk->objectid = cpu_to_le64(cpu->objectid);
728 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
729 struct btrfs_key *key, int nr)
731 struct btrfs_disk_key disk_key;
732 btrfs_node_key(eb, &disk_key, nr);
733 btrfs_disk_key_to_cpu(key, &disk_key);
736 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
737 struct btrfs_key *key, int nr)
739 struct btrfs_disk_key disk_key;
740 btrfs_item_key(eb, &disk_key, nr);
741 btrfs_disk_key_to_cpu(key, &disk_key);
744 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
745 struct btrfs_dir_item *item,
746 struct btrfs_key *key)
748 struct btrfs_disk_key disk_key;
749 btrfs_dir_item_key(eb, item, &disk_key);
750 btrfs_disk_key_to_cpu(key, &disk_key);
753 /* struct btrfs_header */
754 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
755 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
757 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
758 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
759 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
760 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
761 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
762 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
764 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
765 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
768 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
770 return (btrfs_header_flags(eb) & flag) == flag;
773 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
775 u64 flags = btrfs_header_flags(eb);
776 btrfs_set_header_flags(eb, flags | flag);
777 return (flags & flag) == flag;
780 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
782 u64 flags = btrfs_header_flags(eb);
783 btrfs_set_header_flags(eb, flags & ~flag);
784 return (flags & flag) == flag;
787 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
789 u64 flags = btrfs_header_flags(eb);
790 return flags >> BTRFS_BACKREF_REV_SHIFT;
793 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
796 u64 flags = btrfs_header_flags(eb);
797 flags &= ~BTRFS_BACKREF_REV_MASK;
798 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
799 btrfs_set_header_flags(eb, flags);
802 static inline unsigned long btrfs_header_fsid(void)
804 return offsetof(struct btrfs_header, fsid);
807 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
809 return offsetof(struct btrfs_header, chunk_tree_uuid);
812 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
814 unsigned long ptr = offsetof(struct btrfs_header, csum);
818 static inline int btrfs_is_leaf(struct extent_buffer *eb)
820 return (btrfs_header_level(eb) == 0);
823 /* struct btrfs_root_item */
824 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
826 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
827 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
828 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
830 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
832 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
833 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
834 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
835 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
836 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
837 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
838 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
839 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
841 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
843 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
845 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
847 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
849 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
852 static inline struct btrfs_timespec* btrfs_root_ctime(
853 struct btrfs_root_item *root_item)
855 unsigned long ptr = (unsigned long)root_item;
856 ptr += offsetof(struct btrfs_root_item, ctime);
857 return (struct btrfs_timespec *)ptr;
860 static inline struct btrfs_timespec* btrfs_root_otime(
861 struct btrfs_root_item *root_item)
863 unsigned long ptr = (unsigned long)root_item;
864 ptr += offsetof(struct btrfs_root_item, otime);
865 return (struct btrfs_timespec *)ptr;
868 static inline struct btrfs_timespec* btrfs_root_stime(
869 struct btrfs_root_item *root_item)
871 unsigned long ptr = (unsigned long)root_item;
872 ptr += offsetof(struct btrfs_root_item, stime);
873 return (struct btrfs_timespec *)ptr;
876 static inline struct btrfs_timespec* btrfs_root_rtime(
877 struct btrfs_root_item *root_item)
879 unsigned long ptr = (unsigned long)root_item;
880 ptr += offsetof(struct btrfs_root_item, rtime);
881 return (struct btrfs_timespec *)ptr;
884 /* struct btrfs_root_backup */
885 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
887 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
889 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
892 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
894 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
896 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
897 chunk_root_level, 8);
899 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
901 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
902 extent_root_gen, 64);
903 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
904 extent_root_level, 8);
906 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
908 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
910 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
913 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
915 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
917 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
920 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
922 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
924 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
926 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
928 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
930 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
933 /* struct btrfs_super_block */
935 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
936 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
937 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
939 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
940 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
941 struct btrfs_super_block, sys_chunk_array_size, 32);
942 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
943 struct btrfs_super_block, chunk_root_generation, 64);
944 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
946 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
948 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
949 chunk_root_level, 8);
950 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
952 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
953 log_root_transid, 64);
954 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
956 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
958 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
960 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
962 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
964 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
966 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
967 root_dir_objectid, 64);
968 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
970 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
972 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
973 compat_ro_flags, 64);
974 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
976 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
978 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
979 cache_generation, 64);
980 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
981 uuid_tree_generation, 64);
982 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
984 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
986 return offsetof(struct btrfs_leaf, items);
989 /* struct btrfs_file_extent_item */
990 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
991 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
993 static inline unsigned long btrfs_file_extent_inline_start(struct
994 btrfs_file_extent_item *e)
996 unsigned long offset = (unsigned long)e;
997 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1001 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1003 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1006 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1008 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
1010 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1012 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
1014 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1015 disk_num_bytes, 64);
1016 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1018 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
1020 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1022 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
1024 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1026 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
1028 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1030 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
1032 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1034 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1035 other_encoding, 16);
1037 /* btrfs_qgroup_status_item */
1038 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
1040 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
1042 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
1044 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
1047 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
1048 struct btrfs_qgroup_status_item, version, 64);
1049 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
1050 struct btrfs_qgroup_status_item, generation, 64);
1051 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
1052 struct btrfs_qgroup_status_item, flags, 64);
1053 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_rescan,
1054 struct btrfs_qgroup_status_item, rescan, 64);
1056 /* btrfs_qgroup_info_item */
1057 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
1059 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
1061 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
1062 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
1063 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
1065 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
1066 struct btrfs_qgroup_info_item, excl_cmpr, 64);
1068 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
1069 struct btrfs_qgroup_info_item, generation, 64);
1070 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
1071 struct btrfs_qgroup_info_item, rfer, 64);
1072 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
1073 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
1074 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
1075 struct btrfs_qgroup_info_item, excl, 64);
1076 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
1077 struct btrfs_qgroup_info_item, excl_cmpr, 64);
1079 /* btrfs_qgroup_limit_item */
1080 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
1082 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
1084 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
1086 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
1088 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
1091 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
1092 struct btrfs_qgroup_limit_item, flags, 64);
1093 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
1094 struct btrfs_qgroup_limit_item, max_rfer, 64);
1095 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
1096 struct btrfs_qgroup_limit_item, max_excl, 64);
1097 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
1098 struct btrfs_qgroup_limit_item, rsv_rfer, 64);
1099 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
1100 struct btrfs_qgroup_limit_item, rsv_excl, 64);
1102 /* btrfs_balance_item */
1103 BTRFS_SETGET_FUNCS(balance_item_flags, struct btrfs_balance_item, flags, 64);
1105 static inline struct btrfs_disk_balance_args* btrfs_balance_item_data(
1106 struct extent_buffer *eb, struct btrfs_balance_item *bi)
1108 unsigned long offset = (unsigned long)bi;
1109 struct btrfs_balance_item *p;
1110 p = (struct btrfs_balance_item *)(eb->data + offset);
1114 static inline struct btrfs_disk_balance_args* btrfs_balance_item_meta(
1115 struct extent_buffer *eb, struct btrfs_balance_item *bi)
1117 unsigned long offset = (unsigned long)bi;
1118 struct btrfs_balance_item *p;
1119 p = (struct btrfs_balance_item *)(eb->data + offset);
1123 static inline struct btrfs_disk_balance_args* btrfs_balance_item_sys(
1124 struct extent_buffer *eb, struct btrfs_balance_item *bi)
1126 unsigned long offset = (unsigned long)bi;
1127 struct btrfs_balance_item *p;
1128 p = (struct btrfs_balance_item *)(eb->data + offset);
1132 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb,
1133 const struct btrfs_dev_stats_item *ptr,
1138 read_extent_buffer(eb, &val,
1139 offsetof(struct btrfs_dev_stats_item, values) +
1140 ((unsigned long)ptr) + (index * sizeof(u64)),
1146 * this returns the number of bytes used by the item on disk, minus the
1147 * size of any extent headers. If a file is compressed on disk, this is
1148 * the compressed size
1150 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1151 struct btrfs_item *e)
1153 unsigned long offset;
1154 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1155 return btrfs_item_size(eb, e) - offset;
1158 #define btrfs_fs_incompat(fs_info, opt) \
1159 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
1161 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
1163 struct btrfs_super_block *disk_super;
1164 disk_super = fs_info->super_copy;
1165 return !!(btrfs_super_incompat_flags(disk_super) & flag);
1168 #define btrfs_fs_compat_ro(fs_info, opt) \
1169 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
1171 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
1173 struct btrfs_super_block *disk_super;
1174 disk_super = fs_info->super_copy;
1175 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
1178 /* helper function to cast into the data area of the leaf. */
1179 #define btrfs_item_ptr(leaf, slot, type) \
1180 ((type *)(btrfs_leaf_data(leaf) + \
1181 btrfs_item_offset_nr(leaf, slot)))
1183 #define btrfs_item_ptr_offset(leaf, slot) \
1184 ((unsigned long)(btrfs_leaf_data(leaf) + \
1185 btrfs_item_offset_nr(leaf, slot)))
1187 static inline u64 btrfs_name_hash(const char *name, int len)
1189 return (u64)crc32c((u32)~1, (u8 *)name, len);
1193 * Figure the key offset of an extended inode ref
1195 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
1198 return crc32(parent_objectid, (u8 *)name, len);
1201 union btrfs_tree_node {
1202 struct btrfs_header header;
1203 struct btrfs_leaf leaf;
1204 struct btrfs_node node;
1207 #define btrfs_path_item_ptr(p,t) \
1208 ((t *) btrfs_path_leaf_data((p)))
1210 u16 btrfs_super_csum_size(const struct btrfs_super_block *s);
1211 const char *btrfs_super_csum_name(u16 csum_type);
1212 u16 btrfs_csum_type_size(u16 csum_type);
1213 size_t btrfs_super_num_csums(void);
1216 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid,
1217 struct btrfs_root_item *item, struct btrfs_key *key);
1220 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1221 struct btrfs_root *root,
1222 struct btrfs_path *path, u64 dir,
1223 const char *name, int name_len,
1225 typedef int (*btrfs_iter_dir_callback_t)(struct btrfs_root *root,
1226 struct extent_buffer *eb,
1227 struct btrfs_dir_item *di);
1228 int btrfs_iter_dir(struct btrfs_root *root, u64 ino,
1229 btrfs_iter_dir_callback_t callback);
1231 int btrfs_lookup_path(struct btrfs_root *root, u64 ino, const char *filename,
1232 struct btrfs_root **root_ret, u64 *ino_ret,
1233 u8 *type_ret, int symlink_limit);
1234 int btrfs_read_extent_inline(struct btrfs_path *path,
1235 struct btrfs_file_extent_item *fi, char *dest);
1236 int btrfs_read_extent_reg(struct btrfs_path *path,
1237 struct btrfs_file_extent_item *fi, u64 offset,
1238 int len, char *dest);
1241 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
1242 enum btrfs_tree_block_status
1243 btrfs_check_node(struct btrfs_fs_info *fs_info,
1244 struct btrfs_disk_key *parent_key, struct extent_buffer *buf);
1245 enum btrfs_tree_block_status
1246 btrfs_check_leaf(struct btrfs_fs_info *fs_info,
1247 struct btrfs_disk_key *parent_key, struct extent_buffer *buf);
1248 struct extent_buffer *read_node_slot(struct btrfs_fs_info *fs_info,
1249 struct extent_buffer *parent, int slot);
1250 int btrfs_previous_item(struct btrfs_root *root,
1251 struct btrfs_path *path, u64 min_objectid,
1253 int btrfs_next_sibling_tree_block(struct btrfs_fs_info *fs_info,
1254 struct btrfs_path *path);
1256 * Walk up the tree as far as necessary to find the next leaf.
1258 * returns 0 if it found something or 1 if there are no greater leaves.
1259 * returns < 0 on io errors.
1261 static inline int btrfs_next_leaf(struct btrfs_root *root,
1262 struct btrfs_path *path)
1264 path->lowest_level = 0;
1265 return btrfs_next_sibling_tree_block(root->fs_info, path);
1268 static inline int btrfs_next_item(struct btrfs_root *root,
1269 struct btrfs_path *p)
1272 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
1273 return btrfs_next_leaf(root, p);
1277 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1278 int btrfs_leaf_free_space(struct extent_buffer *leaf);
1279 int btrfs_search_slot(struct btrfs_trans_handle *trans,
1280 struct btrfs_root *root, const struct btrfs_key *key,
1281 struct btrfs_path *p, int ins_len, int cow);
1282 int btrfs_search_slot_for_read(struct btrfs_root *root,
1283 const struct btrfs_key *key,
1284 struct btrfs_path *p, int find_higher,
1286 void btrfs_release_path(struct btrfs_path *p);
1287 struct btrfs_path *btrfs_alloc_path(void);
1288 void btrfs_free_path(struct btrfs_path *p);
1289 static inline void btrfs_init_path(struct btrfs_path *p)
1291 memset(p, 0, sizeof(*p));
1293 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
1295 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path,
1296 u64 iobjectid, u64 ioff, u8 key_type,
1297 struct btrfs_key *found_key);
1298 #endif /* __BTRFS_CTREE_H__ */