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