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