1 /* SPDX-License-Identifier: GPL-2.0 */
2
3 #ifndef BTRFS_ACCESSORS_H
4 #define BTRFS_ACCESSORS_H
5
6 #include <linux/unaligned.h>
7 #include <linux/stddef.h>
8 #include <linux/types.h>
9 #include <linux/align.h>
10 #include <linux/build_bug.h>
11 #include <linux/compiler.h>
12 #include <linux/string.h>
13 #include <linux/mm.h>
14 #include <uapi/linux/btrfs_tree.h>
15 #include "fs.h"
16 #include "extent_io.h"
17
18 struct extent_buffer;
19
20 /*
21 * Some macros to generate set/get functions for the struct fields. This
22 * assumes there is a lefoo_to_cpu for every type, so lets make a simple one
23 * for u8:
24 */
25 #define le8_to_cpu(v) (v)
26 #define cpu_to_le8(v) (v)
27 #define __le8 u8
28
get_unaligned_le8(const void * p)29 static inline u8 get_unaligned_le8(const void *p)
30 {
31 return *(const u8 *)p;
32 }
33
put_unaligned_le8(u8 val,void * p)34 static inline void put_unaligned_le8(u8 val, void *p)
35 {
36 *(u8 *)p = val;
37 }
38
39 #define read_eb_member(eb, ptr, type, member, result) (\
40 read_extent_buffer(eb, (char *)(result), \
41 ((unsigned long)(ptr)) + \
42 offsetof(type, member), \
43 sizeof_field(type, member)))
44
45 #define write_eb_member(eb, ptr, type, member, source) ( \
46 write_extent_buffer(eb, (const char *)(source), \
47 ((unsigned long)(ptr)) + \
48 offsetof(type, member), \
49 sizeof_field(type, member)))
50
51 #define DECLARE_BTRFS_SETGET_BITS(bits) \
52 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
53 const void *ptr, unsigned long off); \
54 void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \
55 unsigned long off, u##bits val);
56
57 DECLARE_BTRFS_SETGET_BITS(8)
58 DECLARE_BTRFS_SETGET_BITS(16)
59 DECLARE_BTRFS_SETGET_BITS(32)
60 DECLARE_BTRFS_SETGET_BITS(64)
61
62 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
63 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
64 const type *s) \
65 { \
66 static_assert(sizeof(u##bits) == sizeof_field(type, member)); \
67 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
68 } \
69 static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \
70 u##bits val) \
71 { \
72 static_assert(sizeof(u##bits) == sizeof_field(type, member)); \
73 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
74 }
75
76 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
77 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
78 { \
79 const type *p = folio_address(eb->folios[0]) + \
80 offset_in_page(eb->start); \
81 return get_unaligned_le##bits(&p->member); \
82 } \
83 static inline void btrfs_set_##name(const struct extent_buffer *eb, \
84 u##bits val) \
85 { \
86 type *p = folio_address(eb->folios[0]) + offset_in_page(eb->start); \
87 put_unaligned_le##bits(val, &p->member); \
88 }
89
90 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
91 static inline u##bits btrfs_##name(const type *s) \
92 { \
93 return get_unaligned_le##bits(&s->member); \
94 } \
95 static inline void btrfs_set_##name(type *s, u##bits val) \
96 { \
97 put_unaligned_le##bits(val, &s->member); \
98 }
99
btrfs_device_total_bytes(const struct extent_buffer * eb,struct btrfs_dev_item * s)100 static inline u64 btrfs_device_total_bytes(const struct extent_buffer *eb,
101 struct btrfs_dev_item *s)
102 {
103 static_assert(sizeof(u64) == sizeof_field(struct btrfs_dev_item, total_bytes));
104 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes));
105 }
btrfs_set_device_total_bytes(const struct extent_buffer * eb,struct btrfs_dev_item * s,u64 val)106 static inline void btrfs_set_device_total_bytes(const struct extent_buffer *eb,
107 struct btrfs_dev_item *s,
108 u64 val)
109 {
110 static_assert(sizeof(u64) == sizeof_field(struct btrfs_dev_item, total_bytes));
111 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
112 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
113 }
114
115 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
116 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
117 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
118 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
119 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, start_offset, 64);
120 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
121 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
122 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
123 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
124 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
125 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
126
127 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
128 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
129 total_bytes, 64);
130 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
131 bytes_used, 64);
132 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
133 io_align, 32);
134 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
135 io_width, 32);
136 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
137 sector_size, 32);
138 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
139 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, dev_group, 32);
140 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
141 seek_speed, 8);
142 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
143 bandwidth, 8);
144 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
145 generation, 64);
146
btrfs_device_uuid(struct btrfs_dev_item * d)147 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
148 {
149 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
150 }
151
btrfs_device_fsid(struct btrfs_dev_item * d)152 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
153 {
154 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
155 }
156
157 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
158 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
159 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
160 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
161 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
162 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
163 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
164 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
165 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
166 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
167 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
168
btrfs_stripe_dev_uuid(struct btrfs_stripe * s)169 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
170 {
171 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
172 }
173
174 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
175 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
176 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
177 stripe_len, 64);
178 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, io_align, 32);
179 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, io_width, 32);
180 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
181 sector_size, 32);
182 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
183 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
184 num_stripes, 16);
185 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
186 sub_stripes, 16);
187 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
188 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
189
btrfs_stripe_nr(struct btrfs_chunk * c,int nr)190 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, int nr)
191 {
192 unsigned long offset = (unsigned long)c;
193
194 offset += offsetof(struct btrfs_chunk, stripe);
195 offset += nr * sizeof(struct btrfs_stripe);
196 return (struct btrfs_stripe *)offset;
197 }
198
btrfs_stripe_dev_uuid_nr(struct btrfs_chunk * c,int nr)199 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
200 {
201 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
202 }
203
btrfs_stripe_offset_nr(const struct extent_buffer * eb,struct btrfs_chunk * c,int nr)204 static inline u64 btrfs_stripe_offset_nr(const struct extent_buffer *eb,
205 struct btrfs_chunk *c, int nr)
206 {
207 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
208 }
209
btrfs_set_stripe_offset_nr(struct extent_buffer * eb,struct btrfs_chunk * c,int nr,u64 val)210 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
211 struct btrfs_chunk *c, int nr,
212 u64 val)
213 {
214 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
215 }
216
btrfs_stripe_devid_nr(const struct extent_buffer * eb,struct btrfs_chunk * c,int nr)217 static inline u64 btrfs_stripe_devid_nr(const struct extent_buffer *eb,
218 struct btrfs_chunk *c, int nr)
219 {
220 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
221 }
222
btrfs_set_stripe_devid_nr(struct extent_buffer * eb,struct btrfs_chunk * c,int nr,u64 val)223 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
224 struct btrfs_chunk *c, int nr,
225 u64 val)
226 {
227 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
228 }
229
230 /* struct btrfs_block_group_item */
231 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item,
232 used, 64);
233 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item, used, 64);
234 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid,
235 struct btrfs_block_group_item, chunk_objectid, 64);
236
237 BTRFS_SETGET_FUNCS(block_group_chunk_objectid,
238 struct btrfs_block_group_item, chunk_objectid, 64);
239 BTRFS_SETGET_FUNCS(block_group_flags, struct btrfs_block_group_item, flags, 64);
240 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags,
241 struct btrfs_block_group_item, flags, 64);
242
243 /* struct btrfs_block_group_item_v2 */
244 BTRFS_SETGET_STACK_FUNCS(stack_block_group_v2_used, struct btrfs_block_group_item_v2,
245 used, 64);
246 BTRFS_SETGET_FUNCS(block_group_v2_used, struct btrfs_block_group_item_v2, used, 64);
247 BTRFS_SETGET_STACK_FUNCS(stack_block_group_v2_chunk_objectid,
248 struct btrfs_block_group_item_v2, chunk_objectid, 64);
249 BTRFS_SETGET_FUNCS(block_group_v2_chunk_objectid,
250 struct btrfs_block_group_item_v2, chunk_objectid, 64);
251 BTRFS_SETGET_STACK_FUNCS(stack_block_group_v2_flags,
252 struct btrfs_block_group_item_v2, flags, 64);
253 BTRFS_SETGET_FUNCS(block_group_v2_flags, struct btrfs_block_group_item_v2, flags, 64);
254 BTRFS_SETGET_STACK_FUNCS(stack_block_group_v2_remap_bytes,
255 struct btrfs_block_group_item_v2, remap_bytes, 64);
256 BTRFS_SETGET_FUNCS(block_group_v2_remap_bytes, struct btrfs_block_group_item_v2,
257 remap_bytes, 64);
258 BTRFS_SETGET_STACK_FUNCS(stack_block_group_v2_identity_remap_count,
259 struct btrfs_block_group_item_v2, identity_remap_count, 32);
260 BTRFS_SETGET_FUNCS(block_group_v2_identity_remap_count, struct btrfs_block_group_item_v2,
261 identity_remap_count, 32);
262
263 /* struct btrfs_free_space_info */
264 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
265 extent_count, 32);
266 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
267
268 /* struct btrfs_inode_ref */
269 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
270 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
271 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
272 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_index, struct btrfs_inode_ref, index, 64);
273
274 /* struct btrfs_inode_extref */
275 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
276 parent_objectid, 64);
277 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
278 name_len, 16);
279 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
280
281 /* struct btrfs_inode_item */
282 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
283 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
284 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
285 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
286 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
287 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
288 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
289 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
290 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
291 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
292 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
293 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
294 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
295 generation, 64);
296 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
297 sequence, 64);
298 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
299 transid, 64);
300 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
301 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, nbytes, 64);
302 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
303 block_group, 64);
304 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
305 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
306 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
307 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
308 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
309 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
310 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
311 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
312 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
313 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
314
315 BTRFS_SETGET_FUNCS(raid_stride_devid, struct btrfs_raid_stride, devid, 64);
316 BTRFS_SETGET_FUNCS(raid_stride_physical, struct btrfs_raid_stride, physical, 64);
317 BTRFS_SETGET_STACK_FUNCS(stack_raid_stride_devid, struct btrfs_raid_stride, devid, 64);
318 BTRFS_SETGET_STACK_FUNCS(stack_raid_stride_physical, struct btrfs_raid_stride, physical, 64);
319
320 /* struct btrfs_dev_extent */
321 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, chunk_tree, 64);
322 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
323 chunk_objectid, 64);
324 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
325 chunk_offset, 64);
326 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
327 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_chunk_tree, struct btrfs_dev_extent,
328 chunk_tree, 64);
329 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_chunk_objectid, struct btrfs_dev_extent,
330 chunk_objectid, 64);
331 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_chunk_offset, struct btrfs_dev_extent,
332 chunk_offset, 64);
333 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent, length, 64);
334
335 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
336 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, generation, 64);
337 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
338
339 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
340
btrfs_tree_block_key(const struct extent_buffer * eb,struct btrfs_tree_block_info * item,struct btrfs_disk_key * key)341 static inline void btrfs_tree_block_key(const struct extent_buffer *eb,
342 struct btrfs_tree_block_info *item,
343 struct btrfs_disk_key *key)
344 {
345 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
346 }
347
btrfs_set_tree_block_key(const struct extent_buffer * eb,struct btrfs_tree_block_info * item,const struct btrfs_disk_key * key)348 static inline void btrfs_set_tree_block_key(const struct extent_buffer *eb,
349 struct btrfs_tree_block_info *item,
350 const struct btrfs_disk_key *key)
351 {
352 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
353 }
354
355 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, root, 64);
356 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
357 objectid, 64);
358 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
359 offset, 64);
360 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, count, 32);
361
362 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, count, 32);
363
364 BTRFS_SETGET_FUNCS(extent_owner_ref_root_id, struct btrfs_extent_owner_ref,
365 root_id, 64);
366
367 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
368 type, 8);
369 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
370 offset, 64);
371
btrfs_extent_inline_ref_size(int type)372 static inline u32 btrfs_extent_inline_ref_size(int type)
373 {
374 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
375 type == BTRFS_SHARED_BLOCK_REF_KEY)
376 return sizeof(struct btrfs_extent_inline_ref);
377 if (type == BTRFS_SHARED_DATA_REF_KEY)
378 return sizeof(struct btrfs_shared_data_ref) +
379 sizeof(struct btrfs_extent_inline_ref);
380 if (type == BTRFS_EXTENT_DATA_REF_KEY)
381 return sizeof(struct btrfs_extent_data_ref) +
382 offsetof(struct btrfs_extent_inline_ref, offset);
383 if (type == BTRFS_EXTENT_OWNER_REF_KEY)
384 return sizeof(struct btrfs_extent_inline_ref);
385 return 0;
386 }
387
388 /* struct btrfs_node */
389 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
390 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
391 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, blockptr, 64);
392 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
393 generation, 64);
394
btrfs_node_blockptr(const struct extent_buffer * eb,int nr)395 static inline u64 btrfs_node_blockptr(const struct extent_buffer *eb, int nr)
396 {
397 unsigned long ptr;
398
399 ptr = offsetof(struct btrfs_node, ptrs) +
400 sizeof(struct btrfs_key_ptr) * nr;
401 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
402 }
403
btrfs_set_node_blockptr(const struct extent_buffer * eb,int nr,u64 val)404 static inline void btrfs_set_node_blockptr(const struct extent_buffer *eb,
405 int nr, u64 val)
406 {
407 unsigned long ptr;
408
409 ptr = offsetof(struct btrfs_node, ptrs) +
410 sizeof(struct btrfs_key_ptr) * nr;
411 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
412 }
413
btrfs_node_ptr_generation(const struct extent_buffer * eb,int nr)414 static inline u64 btrfs_node_ptr_generation(const struct extent_buffer *eb, int nr)
415 {
416 unsigned long ptr;
417
418 ptr = offsetof(struct btrfs_node, ptrs) +
419 sizeof(struct btrfs_key_ptr) * nr;
420 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
421 }
422
btrfs_set_node_ptr_generation(const struct extent_buffer * eb,int nr,u64 val)423 static inline void btrfs_set_node_ptr_generation(const struct extent_buffer *eb,
424 int nr, u64 val)
425 {
426 unsigned long ptr;
427
428 ptr = offsetof(struct btrfs_node, ptrs) +
429 sizeof(struct btrfs_key_ptr) * nr;
430 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
431 }
432
btrfs_node_key_ptr_offset(const struct extent_buffer * eb,int nr)433 static inline unsigned long btrfs_node_key_ptr_offset(const struct extent_buffer *eb, int nr)
434 {
435 return offsetof(struct btrfs_node, ptrs) +
436 sizeof(struct btrfs_key_ptr) * nr;
437 }
438
439 void btrfs_node_key(const struct extent_buffer *eb,
440 struct btrfs_disk_key *disk_key, int nr);
441
btrfs_set_node_key(const struct extent_buffer * eb,const struct btrfs_disk_key * disk_key,int nr)442 static inline void btrfs_set_node_key(const struct extent_buffer *eb,
443 const struct btrfs_disk_key *disk_key, int nr)
444 {
445 unsigned long ptr;
446
447 ptr = btrfs_node_key_ptr_offset(eb, nr);
448 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
449 struct btrfs_key_ptr, key, disk_key);
450 }
451
452 /* struct btrfs_item */
453 BTRFS_SETGET_FUNCS(raw_item_offset, struct btrfs_item, offset, 32);
454 BTRFS_SETGET_FUNCS(raw_item_size, struct btrfs_item, size, 32);
455 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
456 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
457
btrfs_item_nr_offset(const struct extent_buffer * eb,int nr)458 static inline unsigned long btrfs_item_nr_offset(const struct extent_buffer *eb, int nr)
459 {
460 return offsetof(struct btrfs_leaf, items) +
461 sizeof(struct btrfs_item) * nr;
462 }
463
btrfs_item_nr(const struct extent_buffer * eb,int nr)464 static inline struct btrfs_item *btrfs_item_nr(const struct extent_buffer *eb, int nr)
465 {
466 return (struct btrfs_item *)btrfs_item_nr_offset(eb, nr);
467 }
468
469 #define BTRFS_ITEM_SETGET_FUNCS(member) \
470 static inline u32 btrfs_item_##member(const struct extent_buffer *eb, int slot) \
471 { \
472 return btrfs_raw_item_##member(eb, btrfs_item_nr(eb, slot)); \
473 } \
474 static inline void btrfs_set_item_##member(const struct extent_buffer *eb, \
475 int slot, u32 val) \
476 { \
477 btrfs_set_raw_item_##member(eb, btrfs_item_nr(eb, slot), val); \
478 }
479
480 BTRFS_ITEM_SETGET_FUNCS(offset)
481 BTRFS_ITEM_SETGET_FUNCS(size);
482
btrfs_item_data_end(const struct extent_buffer * eb,int nr)483 static inline u32 btrfs_item_data_end(const struct extent_buffer *eb, int nr)
484 {
485 return btrfs_item_offset(eb, nr) + btrfs_item_size(eb, nr);
486 }
487
btrfs_item_key(const struct extent_buffer * eb,struct btrfs_disk_key * disk_key,int nr)488 static inline void btrfs_item_key(const struct extent_buffer *eb,
489 struct btrfs_disk_key *disk_key, int nr)
490 {
491 struct btrfs_item *item = btrfs_item_nr(eb, nr);
492
493 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
494 }
495
btrfs_set_item_key(struct extent_buffer * eb,const struct btrfs_disk_key * disk_key,int nr)496 static inline void btrfs_set_item_key(struct extent_buffer *eb,
497 const struct btrfs_disk_key *disk_key, int nr)
498 {
499 struct btrfs_item *item = btrfs_item_nr(eb, nr);
500
501 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
502 }
503
504 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
505
506 /* struct btrfs_root_ref */
507 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
508 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
509 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
510 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
511 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
512 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
513
514 /* struct btrfs_dir_item */
515 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
516 BTRFS_SETGET_FUNCS(dir_flags, struct btrfs_dir_item, type, 8);
517 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
518 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
519 BTRFS_SETGET_STACK_FUNCS(stack_dir_flags, struct btrfs_dir_item, type, 8);
520 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, data_len, 16);
521 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
522 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, transid, 64);
523
btrfs_dir_ftype(const struct extent_buffer * eb,const struct btrfs_dir_item * item)524 static inline u8 btrfs_dir_ftype(const struct extent_buffer *eb,
525 const struct btrfs_dir_item *item)
526 {
527 return btrfs_dir_flags_to_ftype(btrfs_dir_flags(eb, item));
528 }
529
btrfs_stack_dir_ftype(const struct btrfs_dir_item * item)530 static inline u8 btrfs_stack_dir_ftype(const struct btrfs_dir_item *item)
531 {
532 return btrfs_dir_flags_to_ftype(btrfs_stack_dir_flags(item));
533 }
534
btrfs_dir_item_key(const struct extent_buffer * eb,const struct btrfs_dir_item * item,struct btrfs_disk_key * key)535 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
536 const struct btrfs_dir_item *item,
537 struct btrfs_disk_key *key)
538 {
539 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
540 }
541
btrfs_set_dir_item_key(struct extent_buffer * eb,struct btrfs_dir_item * item,const struct btrfs_disk_key * key)542 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
543 struct btrfs_dir_item *item,
544 const struct btrfs_disk_key *key)
545 {
546 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
547 }
548
549 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
550 num_entries, 64);
551 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
552 num_bitmaps, 64);
553 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
554 generation, 64);
555
btrfs_free_space_key(const struct extent_buffer * eb,const struct btrfs_free_space_header * h,struct btrfs_disk_key * key)556 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
557 const struct btrfs_free_space_header *h,
558 struct btrfs_disk_key *key)
559 {
560 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
561 }
562
btrfs_set_free_space_key(struct extent_buffer * eb,struct btrfs_free_space_header * h,const struct btrfs_disk_key * key)563 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
564 struct btrfs_free_space_header *h,
565 const struct btrfs_disk_key *key)
566 {
567 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
568 }
569
570 /* struct btrfs_disk_key */
571 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, objectid, 64);
572 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
573 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
574
575 #ifdef __LITTLE_ENDIAN
576
577 /*
578 * Optimized helpers for little-endian architectures where CPU and on-disk
579 * structures have the same endianness and we can skip conversions.
580 */
581
btrfs_disk_key_to_cpu(struct btrfs_key * cpu_key,const struct btrfs_disk_key * disk_key)582 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu_key,
583 const struct btrfs_disk_key *disk_key)
584 {
585 memcpy(cpu_key, disk_key, sizeof(struct btrfs_key));
586 }
587
btrfs_cpu_key_to_disk(struct btrfs_disk_key * disk_key,const struct btrfs_key * cpu_key)588 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk_key,
589 const struct btrfs_key *cpu_key)
590 {
591 memcpy(disk_key, cpu_key, sizeof(struct btrfs_key));
592 }
593
btrfs_node_key_to_cpu(const struct extent_buffer * eb,struct btrfs_key * cpu_key,int nr)594 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
595 struct btrfs_key *cpu_key, int nr)
596 {
597 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
598
599 btrfs_node_key(eb, disk_key, nr);
600 }
601
btrfs_item_key_to_cpu(const struct extent_buffer * eb,struct btrfs_key * cpu_key,int nr)602 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
603 struct btrfs_key *cpu_key, int nr)
604 {
605 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
606
607 btrfs_item_key(eb, disk_key, nr);
608 }
609
btrfs_dir_item_key_to_cpu(const struct extent_buffer * eb,const struct btrfs_dir_item * item,struct btrfs_key * cpu_key)610 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
611 const struct btrfs_dir_item *item,
612 struct btrfs_key *cpu_key)
613 {
614 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
615
616 btrfs_dir_item_key(eb, item, disk_key);
617 }
618
619 #else
620
btrfs_disk_key_to_cpu(struct btrfs_key * cpu,const struct btrfs_disk_key * disk)621 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
622 const struct btrfs_disk_key *disk)
623 {
624 cpu->offset = le64_to_cpu(disk->offset);
625 cpu->type = disk->type;
626 cpu->objectid = le64_to_cpu(disk->objectid);
627 }
628
btrfs_cpu_key_to_disk(struct btrfs_disk_key * disk,const struct btrfs_key * cpu)629 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
630 const struct btrfs_key *cpu)
631 {
632 disk->offset = cpu_to_le64(cpu->offset);
633 disk->type = cpu->type;
634 disk->objectid = cpu_to_le64(cpu->objectid);
635 }
636
btrfs_node_key_to_cpu(const struct extent_buffer * eb,struct btrfs_key * key,int nr)637 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
638 struct btrfs_key *key, int nr)
639 {
640 struct btrfs_disk_key disk_key;
641
642 btrfs_node_key(eb, &disk_key, nr);
643 btrfs_disk_key_to_cpu(key, &disk_key);
644 }
645
btrfs_item_key_to_cpu(const struct extent_buffer * eb,struct btrfs_key * key,int nr)646 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
647 struct btrfs_key *key, int nr)
648 {
649 struct btrfs_disk_key disk_key;
650
651 btrfs_item_key(eb, &disk_key, nr);
652 btrfs_disk_key_to_cpu(key, &disk_key);
653 }
654
btrfs_dir_item_key_to_cpu(const struct extent_buffer * eb,const struct btrfs_dir_item * item,struct btrfs_key * key)655 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
656 const struct btrfs_dir_item *item,
657 struct btrfs_key *key)
658 {
659 struct btrfs_disk_key disk_key;
660
661 btrfs_dir_item_key(eb, item, &disk_key);
662 btrfs_disk_key_to_cpu(key, &disk_key);
663 }
664
665 #endif
666
667 /* struct btrfs_header */
668 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
669 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, generation, 64);
670 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
671 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
672 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
673 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
674 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
675 generation, 64);
676 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
677 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems, 32);
678 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
679
btrfs_header_flag(const struct extent_buffer * eb,u64 flag)680 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
681 {
682 return (btrfs_header_flags(eb) & flag) == flag;
683 }
684
btrfs_set_header_flag(struct extent_buffer * eb,u64 flag)685 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
686 {
687 u64 flags = btrfs_header_flags(eb);
688
689 btrfs_set_header_flags(eb, flags | flag);
690 }
691
btrfs_clear_header_flag(struct extent_buffer * eb,u64 flag)692 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
693 {
694 u64 flags = btrfs_header_flags(eb);
695
696 btrfs_set_header_flags(eb, flags & ~flag);
697 }
698
btrfs_header_backref_rev(const struct extent_buffer * eb)699 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
700 {
701 u64 flags = btrfs_header_flags(eb);
702
703 return flags >> BTRFS_BACKREF_REV_SHIFT;
704 }
705
btrfs_set_header_backref_rev(struct extent_buffer * eb,int rev)706 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, int rev)
707 {
708 u64 flags = btrfs_header_flags(eb);
709
710 flags &= ~BTRFS_BACKREF_REV_MASK;
711 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
712 btrfs_set_header_flags(eb, flags);
713 }
714
btrfs_is_leaf(const struct extent_buffer * eb)715 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
716 {
717 return btrfs_header_level(eb) == 0;
718 }
719
720 /* struct btrfs_root_item */
721 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, generation, 64);
722 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
723 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
724 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
725
726 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, generation, 64);
727 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
728 BTRFS_SETGET_STACK_FUNCS(root_drop_level, struct btrfs_root_item, drop_level, 8);
729 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
730 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
731 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
732 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
733 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
734 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
735 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
736 last_snapshot, 64);
737 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
738 generation_v2, 64);
739 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, ctransid, 64);
740 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, otransid, 64);
741 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, stransid, 64);
742 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, rtransid, 64);
743
744 /* struct btrfs_root_backup */
745 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
746 tree_root, 64);
747 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
748 tree_root_gen, 64);
749 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
750 tree_root_level, 8);
751
752 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
753 chunk_root, 64);
754 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
755 chunk_root_gen, 64);
756 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
757 chunk_root_level, 8);
758
759 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
760 extent_root, 64);
761 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
762 extent_root_gen, 64);
763 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
764 extent_root_level, 8);
765
766 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
767 fs_root, 64);
768 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
769 fs_root_gen, 64);
770 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
771 fs_root_level, 8);
772
773 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
774 dev_root, 64);
775 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
776 dev_root_gen, 64);
777 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
778 dev_root_level, 8);
779
780 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
781 csum_root, 64);
782 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
783 csum_root_gen, 64);
784 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
785 csum_root_level, 8);
786 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
787 total_bytes, 64);
788 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
789 bytes_used, 64);
790 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
791 num_devices, 64);
792
793 /* struct btrfs_balance_item */
794 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
795
btrfs_balance_data(const struct extent_buffer * eb,const struct btrfs_balance_item * bi,struct btrfs_disk_balance_args * ba)796 static inline void btrfs_balance_data(const struct extent_buffer *eb,
797 const struct btrfs_balance_item *bi,
798 struct btrfs_disk_balance_args *ba)
799 {
800 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
801 }
802
btrfs_set_balance_data(struct extent_buffer * eb,struct btrfs_balance_item * bi,const struct btrfs_disk_balance_args * ba)803 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
804 struct btrfs_balance_item *bi,
805 const struct btrfs_disk_balance_args *ba)
806 {
807 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
808 }
809
btrfs_balance_meta(const struct extent_buffer * eb,const struct btrfs_balance_item * bi,struct btrfs_disk_balance_args * ba)810 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
811 const struct btrfs_balance_item *bi,
812 struct btrfs_disk_balance_args *ba)
813 {
814 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
815 }
816
btrfs_set_balance_meta(struct extent_buffer * eb,struct btrfs_balance_item * bi,const struct btrfs_disk_balance_args * ba)817 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
818 struct btrfs_balance_item *bi,
819 const struct btrfs_disk_balance_args *ba)
820 {
821 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
822 }
823
btrfs_balance_sys(const struct extent_buffer * eb,const struct btrfs_balance_item * bi,struct btrfs_disk_balance_args * ba)824 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
825 const struct btrfs_balance_item *bi,
826 struct btrfs_disk_balance_args *ba)
827 {
828 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
829 }
830
btrfs_set_balance_sys(struct extent_buffer * eb,struct btrfs_balance_item * bi,const struct btrfs_disk_balance_args * ba)831 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
832 struct btrfs_balance_item *bi,
833 const struct btrfs_disk_balance_args *ba)
834 {
835 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
836 }
837
838 /* struct btrfs_super_block */
839 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
840 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
841 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
842 generation, 64);
843 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
844 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
845 struct btrfs_super_block, sys_chunk_array_size, 32);
846 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
847 struct btrfs_super_block, chunk_root_generation, 64);
848 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
849 root_level, 8);
850 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
851 chunk_root, 64);
852 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
853 chunk_root_level, 8);
854 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, log_root, 64);
855 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
856 log_root_level, 8);
857 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
858 total_bytes, 64);
859 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
860 bytes_used, 64);
861 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
862 sectorsize, 32);
863 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
864 nodesize, 32);
865 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
866 stripesize, 32);
867 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
868 root_dir_objectid, 64);
869 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
870 num_devices, 64);
871 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
872 compat_flags, 64);
873 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
874 compat_ro_flags, 64);
875 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
876 incompat_flags, 64);
877 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
878 csum_type, 16);
879 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
880 cache_generation, 64);
881 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
882 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
883 uuid_tree_generation, 64);
884 BTRFS_SETGET_STACK_FUNCS(super_nr_global_roots, struct btrfs_super_block,
885 nr_global_roots, 64);
886 BTRFS_SETGET_STACK_FUNCS(super_remap_root, struct btrfs_super_block,
887 remap_root, 64);
888 BTRFS_SETGET_STACK_FUNCS(super_remap_root_generation, struct btrfs_super_block,
889 remap_root_generation, 64);
890 BTRFS_SETGET_STACK_FUNCS(super_remap_root_level, struct btrfs_super_block,
891 remap_root_level, 8);
892
893 /* struct btrfs_file_extent_item */
894 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item,
895 type, 8);
896 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
897 struct btrfs_file_extent_item, disk_bytenr, 64);
898 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
899 struct btrfs_file_extent_item, offset, 64);
900 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
901 struct btrfs_file_extent_item, generation, 64);
902 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
903 struct btrfs_file_extent_item, num_bytes, 64);
904 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes,
905 struct btrfs_file_extent_item, ram_bytes, 64);
906 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
907 struct btrfs_file_extent_item, disk_num_bytes, 64);
908 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
909 struct btrfs_file_extent_item, compression, 8);
910
911
912 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
913 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
914 disk_bytenr, 64);
915 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
916 generation, 64);
917 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
918 disk_num_bytes, 64);
919 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
920 offset, 64);
921 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
922 num_bytes, 64);
923 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
924 ram_bytes, 64);
925 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
926 compression, 8);
927 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
928 encryption, 8);
929 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
930 other_encoding, 16);
931
932 /* btrfs_qgroup_status_item */
933 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
934 generation, 64);
935 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
936 version, 64);
937 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
938 flags, 64);
939 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
940 rescan, 64);
941 BTRFS_SETGET_FUNCS(qgroup_status_enable_gen, struct btrfs_qgroup_status_item,
942 enable_gen, 64);
943
944 /* btrfs_qgroup_info_item */
945 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
946 generation, 64);
947 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
948 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
949 rfer_cmpr, 64);
950 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
951 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
952 excl_cmpr, 64);
953
954 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
955 struct btrfs_qgroup_info_item, generation, 64);
956 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
957 rfer, 64);
958 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
959 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
960 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
961 excl, 64);
962 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
963 struct btrfs_qgroup_info_item, excl_cmpr, 64);
964
965 /* btrfs_qgroup_limit_item */
966 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, flags, 64);
967 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
968 max_rfer, 64);
969 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
970 max_excl, 64);
971 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
972 rsv_rfer, 64);
973 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
974 rsv_excl, 64);
975 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
976 struct btrfs_qgroup_limit_item, flags, 64);
977 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_rfer,
978 struct btrfs_qgroup_limit_item, max_rfer, 64);
979 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_excl,
980 struct btrfs_qgroup_limit_item, max_excl, 64);
981 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_rfer,
982 struct btrfs_qgroup_limit_item, rsv_rfer, 64);
983 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_excl,
984 struct btrfs_qgroup_limit_item, rsv_excl, 64);
985
986 /* btrfs_dev_replace_item */
987 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
988 struct btrfs_dev_replace_item, src_devid, 64);
989 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
990 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
991 64);
992 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
993 replace_state, 64);
994 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
995 time_started, 64);
996 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
997 time_stopped, 64);
998 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
999 num_write_errors, 64);
1000 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
1001 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
1002 64);
1003 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
1004 cursor_left, 64);
1005 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
1006 cursor_right, 64);
1007
1008 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
1009 struct btrfs_dev_replace_item, src_devid, 64);
1010 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
1011 struct btrfs_dev_replace_item,
1012 cont_reading_from_srcdev_mode, 64);
1013 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
1014 struct btrfs_dev_replace_item, replace_state, 64);
1015 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
1016 struct btrfs_dev_replace_item, time_started, 64);
1017 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
1018 struct btrfs_dev_replace_item, time_stopped, 64);
1019 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
1020 struct btrfs_dev_replace_item, num_write_errors, 64);
1021 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
1022 struct btrfs_dev_replace_item,
1023 num_uncorrectable_read_errors, 64);
1024 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
1025 struct btrfs_dev_replace_item, cursor_left, 64);
1026 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
1027 struct btrfs_dev_replace_item, cursor_right, 64);
1028
1029 /* btrfs_verity_descriptor_item */
1030 BTRFS_SETGET_FUNCS(verity_descriptor_encryption, struct btrfs_verity_descriptor_item,
1031 encryption, 8);
1032 BTRFS_SETGET_FUNCS(verity_descriptor_size, struct btrfs_verity_descriptor_item,
1033 size, 64);
1034 BTRFS_SETGET_STACK_FUNCS(stack_verity_descriptor_encryption,
1035 struct btrfs_verity_descriptor_item, encryption, 8);
1036 BTRFS_SETGET_STACK_FUNCS(stack_verity_descriptor_size,
1037 struct btrfs_verity_descriptor_item, size, 64);
1038
1039 BTRFS_SETGET_FUNCS(remap_address, struct btrfs_remap_item, address, 64);
1040 BTRFS_SETGET_STACK_FUNCS(stack_remap_address, struct btrfs_remap_item,
1041 address, 64);
1042
1043 /* Cast into the data area of the leaf. */
1044 #define btrfs_item_ptr(leaf, slot, type) \
1045 ((type *)(btrfs_item_nr_offset(leaf, 0) + btrfs_item_offset(leaf, slot)))
1046
1047 #define btrfs_item_ptr_offset(leaf, slot) \
1048 ((unsigned long)(btrfs_item_nr_offset(leaf, 0) + btrfs_item_offset(leaf, slot)))
1049
1050 #endif
1051