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 16 struct extent_buffer; 17 18 struct btrfs_map_token { 19 struct extent_buffer *eb; 20 char *kaddr; 21 unsigned long offset; 22 }; 23 24 void btrfs_init_map_token(struct btrfs_map_token *token, struct extent_buffer *eb); 25 26 /* 27 * Some macros to generate set/get functions for the struct fields. This 28 * assumes there is a lefoo_to_cpu for every type, so lets make a simple one 29 * for u8: 30 */ 31 #define le8_to_cpu(v) (v) 32 #define cpu_to_le8(v) (v) 33 #define __le8 u8 34 get_unaligned_le8(const void * p)35 static inline u8 get_unaligned_le8(const void *p) 36 { 37 return *(const u8 *)p; 38 } 39 put_unaligned_le8(u8 val,void * p)40 static inline void put_unaligned_le8(u8 val, void *p) 41 { 42 *(u8 *)p = val; 43 } 44 45 #define read_eb_member(eb, ptr, type, member, result) (\ 46 read_extent_buffer(eb, (char *)(result), \ 47 ((unsigned long)(ptr)) + \ 48 offsetof(type, member), \ 49 sizeof_field(type, member))) 50 51 #define write_eb_member(eb, ptr, type, member, source) ( \ 52 write_extent_buffer(eb, (const char *)(source), \ 53 ((unsigned long)(ptr)) + \ 54 offsetof(type, member), \ 55 sizeof_field(type, member))) 56 57 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 58 u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \ 59 const void *ptr, unsigned long off); \ 60 void btrfs_set_token_##bits(struct btrfs_map_token *token, \ 61 const void *ptr, unsigned long off, \ 62 u##bits val); \ 63 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 64 const void *ptr, unsigned long off); \ 65 void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \ 66 unsigned long off, u##bits val); 67 68 DECLARE_BTRFS_SETGET_BITS(8) 69 DECLARE_BTRFS_SETGET_BITS(16) 70 DECLARE_BTRFS_SETGET_BITS(32) 71 DECLARE_BTRFS_SETGET_BITS(64) 72 73 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 74 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 75 const type *s) \ 76 { \ 77 static_assert(sizeof(u##bits) == sizeof_field(type, member)); \ 78 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 79 } \ 80 static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \ 81 u##bits val) \ 82 { \ 83 static_assert(sizeof(u##bits) == sizeof_field(type, member)); \ 84 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 85 } \ 86 static inline u##bits btrfs_token_##name(struct btrfs_map_token *token, \ 87 const type *s) \ 88 { \ 89 static_assert(sizeof(u##bits) == sizeof_field(type, member)); \ 90 return btrfs_get_token_##bits(token, s, offsetof(type, member));\ 91 } \ 92 static inline void btrfs_set_token_##name(struct btrfs_map_token *token,\ 93 type *s, u##bits val) \ 94 { \ 95 static_assert(sizeof(u##bits) == sizeof_field(type, member)); \ 96 btrfs_set_token_##bits(token, s, offsetof(type, member), val); \ 97 } 98 99 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 100 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 101 { \ 102 const type *p = folio_address(eb->folios[0]) + \ 103 offset_in_page(eb->start); \ 104 return get_unaligned_le##bits(&p->member); \ 105 } \ 106 static inline void btrfs_set_##name(const struct extent_buffer *eb, \ 107 u##bits val) \ 108 { \ 109 type *p = folio_address(eb->folios[0]) + offset_in_page(eb->start); \ 110 put_unaligned_le##bits(val, &p->member); \ 111 } 112 113 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 114 static inline u##bits btrfs_##name(const type *s) \ 115 { \ 116 return get_unaligned_le##bits(&s->member); \ 117 } \ 118 static inline void btrfs_set_##name(type *s, u##bits val) \ 119 { \ 120 put_unaligned_le##bits(val, &s->member); \ 121 } 122 btrfs_device_total_bytes(const struct extent_buffer * eb,struct btrfs_dev_item * s)123 static inline u64 btrfs_device_total_bytes(const struct extent_buffer *eb, 124 struct btrfs_dev_item *s) 125 { 126 static_assert(sizeof(u64) == sizeof_field(struct btrfs_dev_item, total_bytes)); 127 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes)); 128 } btrfs_set_device_total_bytes(const struct extent_buffer * eb,struct btrfs_dev_item * s,u64 val)129 static inline void btrfs_set_device_total_bytes(const struct extent_buffer *eb, 130 struct btrfs_dev_item *s, 131 u64 val) 132 { 133 static_assert(sizeof(u64) == sizeof_field(struct btrfs_dev_item, total_bytes)); 134 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 135 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 136 } 137 138 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 139 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 140 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 141 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 142 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, start_offset, 64); 143 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 144 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 145 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 146 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 147 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 148 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 149 150 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 151 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 152 total_bytes, 64); 153 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 154 bytes_used, 64); 155 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 156 io_align, 32); 157 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 158 io_width, 32); 159 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 160 sector_size, 32); 161 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 162 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, dev_group, 32); 163 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 164 seek_speed, 8); 165 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 166 bandwidth, 8); 167 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 168 generation, 64); 169 btrfs_device_uuid(struct btrfs_dev_item * d)170 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 171 { 172 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 173 } 174 btrfs_device_fsid(struct btrfs_dev_item * d)175 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 176 { 177 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 178 } 179 180 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 181 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 182 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 183 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 184 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 185 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 186 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 187 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 188 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 189 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 190 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 191 btrfs_stripe_dev_uuid(struct btrfs_stripe * s)192 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 193 { 194 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 195 } 196 197 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 198 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 199 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 200 stripe_len, 64); 201 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, io_align, 32); 202 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, io_width, 32); 203 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 204 sector_size, 32); 205 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 206 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 207 num_stripes, 16); 208 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 209 sub_stripes, 16); 210 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 211 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 212 btrfs_stripe_nr(struct btrfs_chunk * c,int nr)213 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, int nr) 214 { 215 unsigned long offset = (unsigned long)c; 216 217 offset += offsetof(struct btrfs_chunk, stripe); 218 offset += nr * sizeof(struct btrfs_stripe); 219 return (struct btrfs_stripe *)offset; 220 } 221 btrfs_stripe_dev_uuid_nr(struct btrfs_chunk * c,int nr)222 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 223 { 224 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 225 } 226 btrfs_stripe_offset_nr(const struct extent_buffer * eb,struct btrfs_chunk * c,int nr)227 static inline u64 btrfs_stripe_offset_nr(const struct extent_buffer *eb, 228 struct btrfs_chunk *c, int nr) 229 { 230 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 231 } 232 btrfs_set_stripe_offset_nr(struct extent_buffer * eb,struct btrfs_chunk * c,int nr,u64 val)233 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb, 234 struct btrfs_chunk *c, int nr, 235 u64 val) 236 { 237 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val); 238 } 239 btrfs_stripe_devid_nr(const struct extent_buffer * eb,struct btrfs_chunk * c,int nr)240 static inline u64 btrfs_stripe_devid_nr(const struct extent_buffer *eb, 241 struct btrfs_chunk *c, int nr) 242 { 243 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 244 } 245 btrfs_set_stripe_devid_nr(struct extent_buffer * eb,struct btrfs_chunk * c,int nr,u64 val)246 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb, 247 struct btrfs_chunk *c, int nr, 248 u64 val) 249 { 250 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val); 251 } 252 253 /* struct btrfs_block_group_item */ 254 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item, 255 used, 64); 256 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item, used, 64); 257 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid, 258 struct btrfs_block_group_item, chunk_objectid, 64); 259 260 BTRFS_SETGET_FUNCS(block_group_chunk_objectid, 261 struct btrfs_block_group_item, chunk_objectid, 64); 262 BTRFS_SETGET_FUNCS(block_group_flags, struct btrfs_block_group_item, flags, 64); 263 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags, 264 struct btrfs_block_group_item, flags, 64); 265 266 /* struct btrfs_free_space_info */ 267 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 268 extent_count, 32); 269 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 270 271 /* struct btrfs_inode_ref */ 272 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 273 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 274 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 275 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_index, struct btrfs_inode_ref, index, 64); 276 277 /* struct btrfs_inode_extref */ 278 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 279 parent_objectid, 64); 280 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 281 name_len, 16); 282 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 283 284 /* struct btrfs_inode_item */ 285 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 286 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 287 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 288 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 289 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 290 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 291 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 292 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 293 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 294 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 295 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 296 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 297 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 298 generation, 64); 299 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 300 sequence, 64); 301 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 302 transid, 64); 303 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 304 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, nbytes, 64); 305 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 306 block_group, 64); 307 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 308 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 309 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 310 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 311 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 312 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 313 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 314 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 315 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 316 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 317 318 BTRFS_SETGET_FUNCS(raid_stride_devid, struct btrfs_raid_stride, devid, 64); 319 BTRFS_SETGET_FUNCS(raid_stride_physical, struct btrfs_raid_stride, physical, 64); 320 BTRFS_SETGET_STACK_FUNCS(stack_raid_stride_devid, struct btrfs_raid_stride, devid, 64); 321 BTRFS_SETGET_STACK_FUNCS(stack_raid_stride_physical, struct btrfs_raid_stride, physical, 64); 322 323 /* struct btrfs_dev_extent */ 324 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, chunk_tree, 64); 325 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 326 chunk_objectid, 64); 327 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 328 chunk_offset, 64); 329 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 330 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_chunk_tree, struct btrfs_dev_extent, 331 chunk_tree, 64); 332 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_chunk_objectid, struct btrfs_dev_extent, 333 chunk_objectid, 64); 334 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_chunk_offset, struct btrfs_dev_extent, 335 chunk_offset, 64); 336 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent, length, 64); 337 338 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 339 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, generation, 64); 340 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 341 342 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 343 btrfs_tree_block_key(const struct extent_buffer * eb,struct btrfs_tree_block_info * item,struct btrfs_disk_key * key)344 static inline void btrfs_tree_block_key(const struct extent_buffer *eb, 345 struct btrfs_tree_block_info *item, 346 struct btrfs_disk_key *key) 347 { 348 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 349 } 350 btrfs_set_tree_block_key(const struct extent_buffer * eb,struct btrfs_tree_block_info * item,const struct btrfs_disk_key * key)351 static inline void btrfs_set_tree_block_key(const struct extent_buffer *eb, 352 struct btrfs_tree_block_info *item, 353 const struct btrfs_disk_key *key) 354 { 355 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 356 } 357 358 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, root, 64); 359 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 360 objectid, 64); 361 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 362 offset, 64); 363 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, count, 32); 364 365 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, count, 32); 366 367 BTRFS_SETGET_FUNCS(extent_owner_ref_root_id, struct btrfs_extent_owner_ref, 368 root_id, 64); 369 370 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 371 type, 8); 372 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 373 offset, 64); 374 btrfs_extent_inline_ref_size(int type)375 static inline u32 btrfs_extent_inline_ref_size(int type) 376 { 377 if (type == BTRFS_TREE_BLOCK_REF_KEY || 378 type == BTRFS_SHARED_BLOCK_REF_KEY) 379 return sizeof(struct btrfs_extent_inline_ref); 380 if (type == BTRFS_SHARED_DATA_REF_KEY) 381 return sizeof(struct btrfs_shared_data_ref) + 382 sizeof(struct btrfs_extent_inline_ref); 383 if (type == BTRFS_EXTENT_DATA_REF_KEY) 384 return sizeof(struct btrfs_extent_data_ref) + 385 offsetof(struct btrfs_extent_inline_ref, offset); 386 if (type == BTRFS_EXTENT_OWNER_REF_KEY) 387 return sizeof(struct btrfs_extent_inline_ref); 388 return 0; 389 } 390 391 /* struct btrfs_node */ 392 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 393 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 394 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, blockptr, 64); 395 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 396 generation, 64); 397 btrfs_node_blockptr(const struct extent_buffer * eb,int nr)398 static inline u64 btrfs_node_blockptr(const struct extent_buffer *eb, int nr) 399 { 400 unsigned long ptr; 401 402 ptr = offsetof(struct btrfs_node, ptrs) + 403 sizeof(struct btrfs_key_ptr) * nr; 404 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 405 } 406 btrfs_set_node_blockptr(const struct extent_buffer * eb,int nr,u64 val)407 static inline void btrfs_set_node_blockptr(const struct extent_buffer *eb, 408 int nr, u64 val) 409 { 410 unsigned long ptr; 411 412 ptr = offsetof(struct btrfs_node, ptrs) + 413 sizeof(struct btrfs_key_ptr) * nr; 414 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 415 } 416 btrfs_node_ptr_generation(const struct extent_buffer * eb,int nr)417 static inline u64 btrfs_node_ptr_generation(const struct extent_buffer *eb, int nr) 418 { 419 unsigned long ptr; 420 421 ptr = offsetof(struct btrfs_node, ptrs) + 422 sizeof(struct btrfs_key_ptr) * nr; 423 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 424 } 425 btrfs_set_node_ptr_generation(const struct extent_buffer * eb,int nr,u64 val)426 static inline void btrfs_set_node_ptr_generation(const struct extent_buffer *eb, 427 int nr, u64 val) 428 { 429 unsigned long ptr; 430 431 ptr = offsetof(struct btrfs_node, ptrs) + 432 sizeof(struct btrfs_key_ptr) * nr; 433 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 434 } 435 btrfs_node_key_ptr_offset(const struct extent_buffer * eb,int nr)436 static inline unsigned long btrfs_node_key_ptr_offset(const struct extent_buffer *eb, int nr) 437 { 438 return offsetof(struct btrfs_node, ptrs) + 439 sizeof(struct btrfs_key_ptr) * nr; 440 } 441 442 void btrfs_node_key(const struct extent_buffer *eb, 443 struct btrfs_disk_key *disk_key, int nr); 444 btrfs_set_node_key(const struct extent_buffer * eb,const struct btrfs_disk_key * disk_key,int nr)445 static inline void btrfs_set_node_key(const struct extent_buffer *eb, 446 const struct btrfs_disk_key *disk_key, int nr) 447 { 448 unsigned long ptr; 449 450 ptr = btrfs_node_key_ptr_offset(eb, nr); 451 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 452 struct btrfs_key_ptr, key, disk_key); 453 } 454 455 /* struct btrfs_item */ 456 BTRFS_SETGET_FUNCS(raw_item_offset, struct btrfs_item, offset, 32); 457 BTRFS_SETGET_FUNCS(raw_item_size, struct btrfs_item, size, 32); 458 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 459 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 460 btrfs_item_nr_offset(const struct extent_buffer * eb,int nr)461 static inline unsigned long btrfs_item_nr_offset(const struct extent_buffer *eb, int nr) 462 { 463 return offsetof(struct btrfs_leaf, items) + 464 sizeof(struct btrfs_item) * nr; 465 } 466 btrfs_item_nr(const struct extent_buffer * eb,int nr)467 static inline struct btrfs_item *btrfs_item_nr(const struct extent_buffer *eb, int nr) 468 { 469 return (struct btrfs_item *)btrfs_item_nr_offset(eb, nr); 470 } 471 472 #define BTRFS_ITEM_SETGET_FUNCS(member) \ 473 static inline u32 btrfs_item_##member(const struct extent_buffer *eb, int slot) \ 474 { \ 475 return btrfs_raw_item_##member(eb, btrfs_item_nr(eb, slot)); \ 476 } \ 477 static inline void btrfs_set_item_##member(const struct extent_buffer *eb, \ 478 int slot, u32 val) \ 479 { \ 480 btrfs_set_raw_item_##member(eb, btrfs_item_nr(eb, slot), val); \ 481 } \ 482 static inline u32 btrfs_token_item_##member(struct btrfs_map_token *token, \ 483 int slot) \ 484 { \ 485 struct btrfs_item *item = btrfs_item_nr(token->eb, slot); \ 486 return btrfs_token_raw_item_##member(token, item); \ 487 } \ 488 static inline void btrfs_set_token_item_##member(struct btrfs_map_token *token, \ 489 int slot, u32 val) \ 490 { \ 491 struct btrfs_item *item = btrfs_item_nr(token->eb, slot); \ 492 btrfs_set_token_raw_item_##member(token, item, val); \ 493 } 494 495 BTRFS_ITEM_SETGET_FUNCS(offset) 496 BTRFS_ITEM_SETGET_FUNCS(size); 497 btrfs_item_data_end(const struct extent_buffer * eb,int nr)498 static inline u32 btrfs_item_data_end(const struct extent_buffer *eb, int nr) 499 { 500 return btrfs_item_offset(eb, nr) + btrfs_item_size(eb, nr); 501 } 502 btrfs_item_key(const struct extent_buffer * eb,struct btrfs_disk_key * disk_key,int nr)503 static inline void btrfs_item_key(const struct extent_buffer *eb, 504 struct btrfs_disk_key *disk_key, int nr) 505 { 506 struct btrfs_item *item = btrfs_item_nr(eb, nr); 507 508 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 509 } 510 btrfs_set_item_key(struct extent_buffer * eb,const struct btrfs_disk_key * disk_key,int nr)511 static inline void btrfs_set_item_key(struct extent_buffer *eb, 512 const struct btrfs_disk_key *disk_key, int nr) 513 { 514 struct btrfs_item *item = btrfs_item_nr(eb, nr); 515 516 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 517 } 518 519 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 520 521 /* struct btrfs_root_ref */ 522 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 523 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 524 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 525 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64); 526 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64); 527 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16); 528 529 /* struct btrfs_dir_item */ 530 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 531 BTRFS_SETGET_FUNCS(dir_flags, struct btrfs_dir_item, type, 8); 532 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 533 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 534 BTRFS_SETGET_STACK_FUNCS(stack_dir_flags, struct btrfs_dir_item, type, 8); 535 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, data_len, 16); 536 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16); 537 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, transid, 64); 538 btrfs_dir_ftype(const struct extent_buffer * eb,const struct btrfs_dir_item * item)539 static inline u8 btrfs_dir_ftype(const struct extent_buffer *eb, 540 const struct btrfs_dir_item *item) 541 { 542 return btrfs_dir_flags_to_ftype(btrfs_dir_flags(eb, item)); 543 } 544 btrfs_stack_dir_ftype(const struct btrfs_dir_item * item)545 static inline u8 btrfs_stack_dir_ftype(const struct btrfs_dir_item *item) 546 { 547 return btrfs_dir_flags_to_ftype(btrfs_stack_dir_flags(item)); 548 } 549 btrfs_dir_item_key(const struct extent_buffer * eb,const struct btrfs_dir_item * item,struct btrfs_disk_key * key)550 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 551 const struct btrfs_dir_item *item, 552 struct btrfs_disk_key *key) 553 { 554 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 555 } 556 btrfs_set_dir_item_key(struct extent_buffer * eb,struct btrfs_dir_item * item,const struct btrfs_disk_key * key)557 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 558 struct btrfs_dir_item *item, 559 const struct btrfs_disk_key *key) 560 { 561 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 562 } 563 564 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 565 num_entries, 64); 566 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 567 num_bitmaps, 64); 568 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 569 generation, 64); 570 btrfs_free_space_key(const struct extent_buffer * eb,const struct btrfs_free_space_header * h,struct btrfs_disk_key * key)571 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 572 const struct btrfs_free_space_header *h, 573 struct btrfs_disk_key *key) 574 { 575 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 576 } 577 btrfs_set_free_space_key(struct extent_buffer * eb,struct btrfs_free_space_header * h,const struct btrfs_disk_key * key)578 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 579 struct btrfs_free_space_header *h, 580 const struct btrfs_disk_key *key) 581 { 582 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 583 } 584 585 /* struct btrfs_disk_key */ 586 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, objectid, 64); 587 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 588 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 589 590 #ifdef __LITTLE_ENDIAN 591 592 /* 593 * Optimized helpers for little-endian architectures where CPU and on-disk 594 * structures have the same endianness and we can skip conversions. 595 */ 596 btrfs_disk_key_to_cpu(struct btrfs_key * cpu_key,const struct btrfs_disk_key * disk_key)597 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu_key, 598 const struct btrfs_disk_key *disk_key) 599 { 600 memcpy(cpu_key, disk_key, sizeof(struct btrfs_key)); 601 } 602 btrfs_cpu_key_to_disk(struct btrfs_disk_key * disk_key,const struct btrfs_key * cpu_key)603 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk_key, 604 const struct btrfs_key *cpu_key) 605 { 606 memcpy(disk_key, cpu_key, sizeof(struct btrfs_key)); 607 } 608 btrfs_node_key_to_cpu(const struct extent_buffer * eb,struct btrfs_key * cpu_key,int nr)609 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 610 struct btrfs_key *cpu_key, int nr) 611 { 612 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 613 614 btrfs_node_key(eb, disk_key, nr); 615 } 616 btrfs_item_key_to_cpu(const struct extent_buffer * eb,struct btrfs_key * cpu_key,int nr)617 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 618 struct btrfs_key *cpu_key, int nr) 619 { 620 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 621 622 btrfs_item_key(eb, disk_key, nr); 623 } 624 btrfs_dir_item_key_to_cpu(const struct extent_buffer * eb,const struct btrfs_dir_item * item,struct btrfs_key * cpu_key)625 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 626 const struct btrfs_dir_item *item, 627 struct btrfs_key *cpu_key) 628 { 629 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 630 631 btrfs_dir_item_key(eb, item, disk_key); 632 } 633 634 #else 635 btrfs_disk_key_to_cpu(struct btrfs_key * cpu,const struct btrfs_disk_key * disk)636 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 637 const struct btrfs_disk_key *disk) 638 { 639 cpu->offset = le64_to_cpu(disk->offset); 640 cpu->type = disk->type; 641 cpu->objectid = le64_to_cpu(disk->objectid); 642 } 643 btrfs_cpu_key_to_disk(struct btrfs_disk_key * disk,const struct btrfs_key * cpu)644 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 645 const struct btrfs_key *cpu) 646 { 647 disk->offset = cpu_to_le64(cpu->offset); 648 disk->type = cpu->type; 649 disk->objectid = cpu_to_le64(cpu->objectid); 650 } 651 btrfs_node_key_to_cpu(const struct extent_buffer * eb,struct btrfs_key * key,int nr)652 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 653 struct btrfs_key *key, int nr) 654 { 655 struct btrfs_disk_key disk_key; 656 657 btrfs_node_key(eb, &disk_key, nr); 658 btrfs_disk_key_to_cpu(key, &disk_key); 659 } 660 btrfs_item_key_to_cpu(const struct extent_buffer * eb,struct btrfs_key * key,int nr)661 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 662 struct btrfs_key *key, int nr) 663 { 664 struct btrfs_disk_key disk_key; 665 666 btrfs_item_key(eb, &disk_key, nr); 667 btrfs_disk_key_to_cpu(key, &disk_key); 668 } 669 btrfs_dir_item_key_to_cpu(const struct extent_buffer * eb,const struct btrfs_dir_item * item,struct btrfs_key * key)670 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 671 const struct btrfs_dir_item *item, 672 struct btrfs_key *key) 673 { 674 struct btrfs_disk_key disk_key; 675 676 btrfs_dir_item_key(eb, item, &disk_key); 677 btrfs_disk_key_to_cpu(key, &disk_key); 678 } 679 680 #endif 681 682 /* struct btrfs_header */ 683 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 684 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, generation, 64); 685 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 686 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 687 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 688 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 689 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 690 generation, 64); 691 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 692 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems, 32); 693 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 694 btrfs_header_flag(const struct extent_buffer * eb,u64 flag)695 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 696 { 697 return (btrfs_header_flags(eb) & flag) == flag; 698 } 699 btrfs_set_header_flag(struct extent_buffer * eb,u64 flag)700 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 701 { 702 u64 flags = btrfs_header_flags(eb); 703 704 btrfs_set_header_flags(eb, flags | flag); 705 } 706 btrfs_clear_header_flag(struct extent_buffer * eb,u64 flag)707 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 708 { 709 u64 flags = btrfs_header_flags(eb); 710 711 btrfs_set_header_flags(eb, flags & ~flag); 712 } 713 btrfs_header_backref_rev(const struct extent_buffer * eb)714 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 715 { 716 u64 flags = btrfs_header_flags(eb); 717 718 return flags >> BTRFS_BACKREF_REV_SHIFT; 719 } 720 btrfs_set_header_backref_rev(struct extent_buffer * eb,int rev)721 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, int rev) 722 { 723 u64 flags = btrfs_header_flags(eb); 724 725 flags &= ~BTRFS_BACKREF_REV_MASK; 726 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 727 btrfs_set_header_flags(eb, flags); 728 } 729 btrfs_is_leaf(const struct extent_buffer * eb)730 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 731 { 732 return btrfs_header_level(eb) == 0; 733 } 734 735 /* struct btrfs_root_item */ 736 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, generation, 64); 737 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 738 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 739 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 740 741 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, generation, 64); 742 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 743 BTRFS_SETGET_STACK_FUNCS(root_drop_level, struct btrfs_root_item, drop_level, 8); 744 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 745 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 746 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 747 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 748 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 749 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 750 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 751 last_snapshot, 64); 752 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 753 generation_v2, 64); 754 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, ctransid, 64); 755 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, otransid, 64); 756 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, stransid, 64); 757 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, rtransid, 64); 758 759 /* struct btrfs_root_backup */ 760 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 761 tree_root, 64); 762 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 763 tree_root_gen, 64); 764 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 765 tree_root_level, 8); 766 767 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 768 chunk_root, 64); 769 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 770 chunk_root_gen, 64); 771 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 772 chunk_root_level, 8); 773 774 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 775 extent_root, 64); 776 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 777 extent_root_gen, 64); 778 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 779 extent_root_level, 8); 780 781 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 782 fs_root, 64); 783 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 784 fs_root_gen, 64); 785 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 786 fs_root_level, 8); 787 788 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 789 dev_root, 64); 790 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 791 dev_root_gen, 64); 792 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 793 dev_root_level, 8); 794 795 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 796 csum_root, 64); 797 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 798 csum_root_gen, 64); 799 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 800 csum_root_level, 8); 801 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 802 total_bytes, 64); 803 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 804 bytes_used, 64); 805 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 806 num_devices, 64); 807 808 /* struct btrfs_balance_item */ 809 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 810 btrfs_balance_data(const struct extent_buffer * eb,const struct btrfs_balance_item * bi,struct btrfs_disk_balance_args * ba)811 static inline void btrfs_balance_data(const struct extent_buffer *eb, 812 const struct btrfs_balance_item *bi, 813 struct btrfs_disk_balance_args *ba) 814 { 815 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 816 } 817 btrfs_set_balance_data(struct extent_buffer * eb,struct btrfs_balance_item * bi,const struct btrfs_disk_balance_args * ba)818 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 819 struct btrfs_balance_item *bi, 820 const struct btrfs_disk_balance_args *ba) 821 { 822 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 823 } 824 btrfs_balance_meta(const struct extent_buffer * eb,const struct btrfs_balance_item * bi,struct btrfs_disk_balance_args * ba)825 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 826 const struct btrfs_balance_item *bi, 827 struct btrfs_disk_balance_args *ba) 828 { 829 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 830 } 831 btrfs_set_balance_meta(struct extent_buffer * eb,struct btrfs_balance_item * bi,const struct btrfs_disk_balance_args * ba)832 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 833 struct btrfs_balance_item *bi, 834 const struct btrfs_disk_balance_args *ba) 835 { 836 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 837 } 838 btrfs_balance_sys(const struct extent_buffer * eb,const struct btrfs_balance_item * bi,struct btrfs_disk_balance_args * ba)839 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 840 const struct btrfs_balance_item *bi, 841 struct btrfs_disk_balance_args *ba) 842 { 843 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 844 } 845 btrfs_set_balance_sys(struct extent_buffer * eb,struct btrfs_balance_item * bi,const struct btrfs_disk_balance_args * ba)846 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 847 struct btrfs_balance_item *bi, 848 const struct btrfs_disk_balance_args *ba) 849 { 850 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 851 } 852 853 /* struct btrfs_super_block */ 854 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 855 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 856 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 857 generation, 64); 858 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 859 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 860 struct btrfs_super_block, sys_chunk_array_size, 32); 861 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 862 struct btrfs_super_block, chunk_root_generation, 64); 863 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 864 root_level, 8); 865 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 866 chunk_root, 64); 867 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 868 chunk_root_level, 8); 869 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, log_root, 64); 870 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 871 log_root_level, 8); 872 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 873 total_bytes, 64); 874 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 875 bytes_used, 64); 876 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 877 sectorsize, 32); 878 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 879 nodesize, 32); 880 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 881 stripesize, 32); 882 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 883 root_dir_objectid, 64); 884 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 885 num_devices, 64); 886 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 887 compat_flags, 64); 888 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 889 compat_ro_flags, 64); 890 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 891 incompat_flags, 64); 892 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 893 csum_type, 16); 894 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 895 cache_generation, 64); 896 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 897 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 898 uuid_tree_generation, 64); 899 BTRFS_SETGET_STACK_FUNCS(super_nr_global_roots, struct btrfs_super_block, 900 nr_global_roots, 64); 901 902 /* struct btrfs_file_extent_item */ 903 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, 904 type, 8); 905 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 906 struct btrfs_file_extent_item, disk_bytenr, 64); 907 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 908 struct btrfs_file_extent_item, offset, 64); 909 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 910 struct btrfs_file_extent_item, generation, 64); 911 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 912 struct btrfs_file_extent_item, num_bytes, 64); 913 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, 914 struct btrfs_file_extent_item, ram_bytes, 64); 915 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 916 struct btrfs_file_extent_item, disk_num_bytes, 64); 917 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 918 struct btrfs_file_extent_item, compression, 8); 919 920 921 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 922 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 923 disk_bytenr, 64); 924 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 925 generation, 64); 926 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 927 disk_num_bytes, 64); 928 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 929 offset, 64); 930 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 931 num_bytes, 64); 932 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 933 ram_bytes, 64); 934 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 935 compression, 8); 936 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 937 encryption, 8); 938 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 939 other_encoding, 16); 940 941 /* btrfs_qgroup_status_item */ 942 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 943 generation, 64); 944 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 945 version, 64); 946 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 947 flags, 64); 948 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 949 rescan, 64); 950 BTRFS_SETGET_FUNCS(qgroup_status_enable_gen, struct btrfs_qgroup_status_item, 951 enable_gen, 64); 952 953 /* btrfs_qgroup_info_item */ 954 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 955 generation, 64); 956 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 957 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 958 rfer_cmpr, 64); 959 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 960 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 961 excl_cmpr, 64); 962 963 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 964 struct btrfs_qgroup_info_item, generation, 64); 965 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 966 rfer, 64); 967 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 968 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 969 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 970 excl, 64); 971 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 972 struct btrfs_qgroup_info_item, excl_cmpr, 64); 973 974 /* btrfs_qgroup_limit_item */ 975 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, flags, 64); 976 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 977 max_rfer, 64); 978 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 979 max_excl, 64); 980 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 981 rsv_rfer, 64); 982 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 983 rsv_excl, 64); 984 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags, 985 struct btrfs_qgroup_limit_item, flags, 64); 986 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_rfer, 987 struct btrfs_qgroup_limit_item, max_rfer, 64); 988 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_excl, 989 struct btrfs_qgroup_limit_item, max_excl, 64); 990 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_rfer, 991 struct btrfs_qgroup_limit_item, rsv_rfer, 64); 992 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_excl, 993 struct btrfs_qgroup_limit_item, rsv_excl, 64); 994 995 /* btrfs_dev_replace_item */ 996 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 997 struct btrfs_dev_replace_item, src_devid, 64); 998 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 999 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 1000 64); 1001 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 1002 replace_state, 64); 1003 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 1004 time_started, 64); 1005 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 1006 time_stopped, 64); 1007 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 1008 num_write_errors, 64); 1009 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 1010 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 1011 64); 1012 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 1013 cursor_left, 64); 1014 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 1015 cursor_right, 64); 1016 1017 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 1018 struct btrfs_dev_replace_item, src_devid, 64); 1019 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 1020 struct btrfs_dev_replace_item, 1021 cont_reading_from_srcdev_mode, 64); 1022 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 1023 struct btrfs_dev_replace_item, replace_state, 64); 1024 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 1025 struct btrfs_dev_replace_item, time_started, 64); 1026 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 1027 struct btrfs_dev_replace_item, time_stopped, 64); 1028 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 1029 struct btrfs_dev_replace_item, num_write_errors, 64); 1030 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 1031 struct btrfs_dev_replace_item, 1032 num_uncorrectable_read_errors, 64); 1033 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 1034 struct btrfs_dev_replace_item, cursor_left, 64); 1035 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 1036 struct btrfs_dev_replace_item, cursor_right, 64); 1037 1038 /* btrfs_verity_descriptor_item */ 1039 BTRFS_SETGET_FUNCS(verity_descriptor_encryption, struct btrfs_verity_descriptor_item, 1040 encryption, 8); 1041 BTRFS_SETGET_FUNCS(verity_descriptor_size, struct btrfs_verity_descriptor_item, 1042 size, 64); 1043 BTRFS_SETGET_STACK_FUNCS(stack_verity_descriptor_encryption, 1044 struct btrfs_verity_descriptor_item, encryption, 8); 1045 BTRFS_SETGET_STACK_FUNCS(stack_verity_descriptor_size, 1046 struct btrfs_verity_descriptor_item, size, 64); 1047 1048 /* Cast into the data area of the leaf. */ 1049 #define btrfs_item_ptr(leaf, slot, type) \ 1050 ((type *)(btrfs_item_nr_offset(leaf, 0) + btrfs_item_offset(leaf, slot))) 1051 1052 #define btrfs_item_ptr_offset(leaf, slot) \ 1053 ((unsigned long)(btrfs_item_nr_offset(leaf, 0) + btrfs_item_offset(leaf, slot))) 1054 1055 #endif 1056