1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 #ifndef BTRFS_ZONED_H 4 #define BTRFS_ZONED_H 5 6 #include <linux/types.h> 7 #include <linux/blkdev.h> 8 #include "messages.h" 9 #include "volumes.h" 10 #include "disk-io.h" 11 #include "block-group.h" 12 #include "btrfs_inode.h" 13 14 #define BTRFS_DEFAULT_RECLAIM_THRESH (75) 15 16 struct btrfs_zoned_device_info { 17 /* 18 * Number of zones, zone size and types of zones if bdev is a 19 * zoned block device. 20 */ 21 u64 zone_size; 22 u8 zone_size_shift; 23 u64 max_zone_append_size; 24 u32 nr_zones; 25 unsigned int max_active_zones; 26 atomic_t active_zones_left; 27 unsigned long *seq_zones; 28 unsigned long *empty_zones; 29 unsigned long *active_zones; 30 struct blk_zone *zone_cache; 31 struct blk_zone sb_zones[2 * BTRFS_SUPER_MIRROR_MAX]; 32 }; 33 34 #ifdef CONFIG_BLK_DEV_ZONED 35 int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, 36 struct blk_zone *zone); 37 int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info); 38 int btrfs_get_dev_zone_info(struct btrfs_device *device, bool populate_cache); 39 void btrfs_destroy_dev_zone_info(struct btrfs_device *device); 40 struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info(struct btrfs_device *orig_dev); 41 int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info); 42 int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info); 43 int btrfs_sb_log_location_bdev(struct block_device *bdev, int mirror, int rw, 44 u64 *bytenr_ret); 45 int btrfs_sb_log_location(struct btrfs_device *device, int mirror, int rw, 46 u64 *bytenr_ret); 47 int btrfs_advance_sb_log(struct btrfs_device *device, int mirror); 48 int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror); 49 u64 btrfs_find_allocatable_zones(struct btrfs_device *device, u64 hole_start, 50 u64 hole_end, u64 num_bytes); 51 int btrfs_reset_device_zone(struct btrfs_device *device, u64 physical, 52 u64 length, u64 *bytes); 53 int btrfs_ensure_empty_zones(struct btrfs_device *device, u64 start, u64 size); 54 int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache, bool new); 55 void btrfs_calc_zone_unusable(struct btrfs_block_group *cache); 56 void btrfs_redirty_list_add(struct btrfs_transaction *trans, 57 struct extent_buffer *eb); 58 void btrfs_free_redirty_list(struct btrfs_transaction *trans); 59 bool btrfs_use_zone_append(struct btrfs_inode *inode, u64 start); 60 void btrfs_record_physical_zoned(struct inode *inode, u64 file_offset, 61 struct bio *bio); 62 void btrfs_rewrite_logical_zoned(struct btrfs_ordered_extent *ordered); 63 bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info, 64 struct extent_buffer *eb, 65 struct btrfs_block_group **cache_ret); 66 void btrfs_revert_meta_write_pointer(struct btrfs_block_group *cache, 67 struct extent_buffer *eb); 68 int btrfs_zoned_issue_zeroout(struct btrfs_device *device, u64 physical, u64 length); 69 int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, u64 logical, 70 u64 physical_start, u64 physical_pos); 71 struct btrfs_device *btrfs_zoned_get_device(struct btrfs_fs_info *fs_info, 72 u64 logical, u64 length); 73 bool btrfs_zone_activate(struct btrfs_block_group *block_group); 74 int btrfs_zone_finish(struct btrfs_block_group *block_group); 75 bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, u64 flags); 76 void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical, 77 u64 length); 78 void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg, 79 struct extent_buffer *eb); 80 void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg); 81 void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info); 82 bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info); 83 void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info, u64 logical, 84 u64 length); 85 int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info); 86 int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info, 87 struct btrfs_space_info *space_info, bool do_finish); 88 #else /* CONFIG_BLK_DEV_ZONED */ 89 static inline int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, 90 struct blk_zone *zone) 91 { 92 return 0; 93 } 94 95 static inline int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info) 96 { 97 return 0; 98 } 99 100 static inline int btrfs_get_dev_zone_info(struct btrfs_device *device, 101 bool populate_cache) 102 { 103 return 0; 104 } 105 106 static inline void btrfs_destroy_dev_zone_info(struct btrfs_device *device) { } 107 108 /* 109 * In case the kernel is compiled without CONFIG_BLK_DEV_ZONED we'll never call 110 * into btrfs_clone_dev_zone_info() so it's safe to return NULL here. 111 */ 112 static inline struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info( 113 struct btrfs_device *orig_dev) 114 { 115 return NULL; 116 } 117 118 static inline int btrfs_check_zoned_mode(const struct btrfs_fs_info *fs_info) 119 { 120 if (!btrfs_is_zoned(fs_info)) 121 return 0; 122 123 btrfs_err(fs_info, "zoned block devices support is not enabled"); 124 return -EOPNOTSUPP; 125 } 126 127 static inline int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info) 128 { 129 return 0; 130 } 131 132 static inline int btrfs_sb_log_location_bdev(struct block_device *bdev, 133 int mirror, int rw, u64 *bytenr_ret) 134 { 135 *bytenr_ret = btrfs_sb_offset(mirror); 136 return 0; 137 } 138 139 static inline int btrfs_sb_log_location(struct btrfs_device *device, int mirror, 140 int rw, u64 *bytenr_ret) 141 { 142 *bytenr_ret = btrfs_sb_offset(mirror); 143 return 0; 144 } 145 146 static inline int btrfs_advance_sb_log(struct btrfs_device *device, int mirror) 147 { 148 return 0; 149 } 150 151 static inline int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror) 152 { 153 return 0; 154 } 155 156 static inline u64 btrfs_find_allocatable_zones(struct btrfs_device *device, 157 u64 hole_start, u64 hole_end, 158 u64 num_bytes) 159 { 160 return hole_start; 161 } 162 163 static inline int btrfs_reset_device_zone(struct btrfs_device *device, 164 u64 physical, u64 length, u64 *bytes) 165 { 166 *bytes = 0; 167 return 0; 168 } 169 170 static inline int btrfs_ensure_empty_zones(struct btrfs_device *device, 171 u64 start, u64 size) 172 { 173 return 0; 174 } 175 176 static inline int btrfs_load_block_group_zone_info( 177 struct btrfs_block_group *cache, bool new) 178 { 179 return 0; 180 } 181 182 static inline void btrfs_calc_zone_unusable(struct btrfs_block_group *cache) { } 183 184 static inline void btrfs_redirty_list_add(struct btrfs_transaction *trans, 185 struct extent_buffer *eb) { } 186 static inline void btrfs_free_redirty_list(struct btrfs_transaction *trans) { } 187 188 static inline bool btrfs_use_zone_append(struct btrfs_inode *inode, u64 start) 189 { 190 return false; 191 } 192 193 static inline void btrfs_record_physical_zoned(struct inode *inode, 194 u64 file_offset, struct bio *bio) 195 { 196 } 197 198 static inline void btrfs_rewrite_logical_zoned( 199 struct btrfs_ordered_extent *ordered) { } 200 201 static inline bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info, 202 struct extent_buffer *eb, 203 struct btrfs_block_group **cache_ret) 204 { 205 return true; 206 } 207 208 static inline void btrfs_revert_meta_write_pointer( 209 struct btrfs_block_group *cache, 210 struct extent_buffer *eb) 211 { 212 } 213 214 static inline int btrfs_zoned_issue_zeroout(struct btrfs_device *device, 215 u64 physical, u64 length) 216 { 217 return -EOPNOTSUPP; 218 } 219 220 static inline int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, 221 u64 logical, u64 physical_start, 222 u64 physical_pos) 223 { 224 return -EOPNOTSUPP; 225 } 226 227 static inline struct btrfs_device *btrfs_zoned_get_device( 228 struct btrfs_fs_info *fs_info, 229 u64 logical, u64 length) 230 { 231 return ERR_PTR(-EOPNOTSUPP); 232 } 233 234 static inline bool btrfs_zone_activate(struct btrfs_block_group *block_group) 235 { 236 return true; 237 } 238 239 static inline int btrfs_zone_finish(struct btrfs_block_group *block_group) 240 { 241 return 0; 242 } 243 244 static inline bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, 245 u64 flags) 246 { 247 return true; 248 } 249 250 static inline void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, 251 u64 logical, u64 length) { } 252 253 static inline void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg, 254 struct extent_buffer *eb) { } 255 256 static inline void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg) { } 257 258 static inline void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info) { } 259 260 static inline bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info) 261 { 262 return false; 263 } 264 265 static inline void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info, 266 u64 logical, u64 length) { } 267 268 static inline int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info) 269 { 270 return 1; 271 } 272 273 static inline int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info, 274 struct btrfs_space_info *space_info, 275 bool do_finish) 276 { 277 /* Consider all the block groups are active */ 278 return 0; 279 } 280 281 #endif 282 283 static inline bool btrfs_dev_is_sequential(struct btrfs_device *device, u64 pos) 284 { 285 struct btrfs_zoned_device_info *zone_info = device->zone_info; 286 287 if (!zone_info) 288 return false; 289 290 return test_bit(pos >> zone_info->zone_size_shift, zone_info->seq_zones); 291 } 292 293 static inline bool btrfs_dev_is_empty_zone(struct btrfs_device *device, u64 pos) 294 { 295 struct btrfs_zoned_device_info *zone_info = device->zone_info; 296 297 if (!zone_info) 298 return true; 299 300 return test_bit(pos >> zone_info->zone_size_shift, zone_info->empty_zones); 301 } 302 303 static inline void btrfs_dev_set_empty_zone_bit(struct btrfs_device *device, 304 u64 pos, bool set) 305 { 306 struct btrfs_zoned_device_info *zone_info = device->zone_info; 307 unsigned int zno; 308 309 if (!zone_info) 310 return; 311 312 zno = pos >> zone_info->zone_size_shift; 313 if (set) 314 set_bit(zno, zone_info->empty_zones); 315 else 316 clear_bit(zno, zone_info->empty_zones); 317 } 318 319 static inline void btrfs_dev_set_zone_empty(struct btrfs_device *device, u64 pos) 320 { 321 btrfs_dev_set_empty_zone_bit(device, pos, true); 322 } 323 324 static inline void btrfs_dev_clear_zone_empty(struct btrfs_device *device, u64 pos) 325 { 326 btrfs_dev_set_empty_zone_bit(device, pos, false); 327 } 328 329 static inline bool btrfs_check_device_zone_type(const struct btrfs_fs_info *fs_info, 330 struct block_device *bdev) 331 { 332 if (btrfs_is_zoned(fs_info)) { 333 /* 334 * We can allow a regular device on a zoned filesystem, because 335 * we will emulate the zoned capabilities. 336 */ 337 if (!bdev_is_zoned(bdev)) 338 return true; 339 340 return fs_info->zone_size == 341 (bdev_zone_sectors(bdev) << SECTOR_SHIFT); 342 } 343 344 /* Do not allow Host Manged zoned device */ 345 return bdev_zoned_model(bdev) != BLK_ZONED_HM; 346 } 347 348 static inline bool btrfs_check_super_location(struct btrfs_device *device, u64 pos) 349 { 350 /* 351 * On a non-zoned device, any address is OK. On a zoned device, 352 * non-SEQUENTIAL WRITE REQUIRED zones are capable. 353 */ 354 return device->zone_info == NULL || !btrfs_dev_is_sequential(device, pos); 355 } 356 357 static inline bool btrfs_can_zone_reset(struct btrfs_device *device, 358 u64 physical, u64 length) 359 { 360 u64 zone_size; 361 362 if (!btrfs_dev_is_sequential(device, physical)) 363 return false; 364 365 zone_size = device->zone_info->zone_size; 366 if (!IS_ALIGNED(physical, zone_size) || !IS_ALIGNED(length, zone_size)) 367 return false; 368 369 return true; 370 } 371 372 static inline void btrfs_zoned_meta_io_lock(struct btrfs_fs_info *fs_info) 373 { 374 if (!btrfs_is_zoned(fs_info)) 375 return; 376 mutex_lock(&fs_info->zoned_meta_io_lock); 377 } 378 379 static inline void btrfs_zoned_meta_io_unlock(struct btrfs_fs_info *fs_info) 380 { 381 if (!btrfs_is_zoned(fs_info)) 382 return; 383 mutex_unlock(&fs_info->zoned_meta_io_lock); 384 } 385 386 static inline void btrfs_clear_treelog_bg(struct btrfs_block_group *bg) 387 { 388 struct btrfs_fs_info *fs_info = bg->fs_info; 389 390 if (!btrfs_is_zoned(fs_info)) 391 return; 392 393 spin_lock(&fs_info->treelog_bg_lock); 394 if (fs_info->treelog_bg == bg->start) 395 fs_info->treelog_bg = 0; 396 spin_unlock(&fs_info->treelog_bg_lock); 397 } 398 399 static inline void btrfs_zoned_data_reloc_lock(struct btrfs_inode *inode) 400 { 401 struct btrfs_root *root = inode->root; 402 403 if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info)) 404 mutex_lock(&root->fs_info->zoned_data_reloc_io_lock); 405 } 406 407 static inline void btrfs_zoned_data_reloc_unlock(struct btrfs_inode *inode) 408 { 409 struct btrfs_root *root = inode->root; 410 411 if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info)) 412 mutex_unlock(&root->fs_info->zoned_data_reloc_io_lock); 413 } 414 415 static inline bool btrfs_zoned_bg_is_full(const struct btrfs_block_group *bg) 416 { 417 ASSERT(btrfs_is_zoned(bg->fs_info)); 418 return (bg->alloc_offset == bg->zone_capacity); 419 } 420 421 #endif 422