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 void btrfs_finish_ordered_zoned(struct btrfs_ordered_extent *ordered); 34 35 #ifdef CONFIG_BLK_DEV_ZONED 36 int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, 37 struct blk_zone *zone); 38 int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info); 39 int btrfs_get_dev_zone_info(struct btrfs_device *device, bool populate_cache); 40 void btrfs_destroy_dev_zone_info(struct btrfs_device *device); 41 struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info(struct btrfs_device *orig_dev); 42 int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info); 43 int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info); 44 int btrfs_sb_log_location_bdev(struct block_device *bdev, int mirror, int rw, 45 u64 *bytenr_ret); 46 int btrfs_sb_log_location(struct btrfs_device *device, int mirror, int rw, 47 u64 *bytenr_ret); 48 int btrfs_advance_sb_log(struct btrfs_device *device, int mirror); 49 int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror); 50 u64 btrfs_find_allocatable_zones(struct btrfs_device *device, u64 hole_start, 51 u64 hole_end, u64 num_bytes); 52 int btrfs_reset_device_zone(struct btrfs_device *device, u64 physical, 53 u64 length, u64 *bytes); 54 int btrfs_ensure_empty_zones(struct btrfs_device *device, u64 start, u64 size); 55 int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache, bool new); 56 void btrfs_calc_zone_unusable(struct btrfs_block_group *cache); 57 void btrfs_redirty_list_add(struct btrfs_transaction *trans, 58 struct extent_buffer *eb); 59 bool btrfs_use_zone_append(struct btrfs_bio *bbio); 60 void btrfs_record_physical_zoned(struct btrfs_bio *bbio); 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) { } 182 183 static inline bool btrfs_use_zone_append(struct btrfs_bio *bbio) 184 { 185 return false; 186 } 187 188 static inline void btrfs_record_physical_zoned(struct btrfs_bio *bbio) 189 { 190 } 191 192 static inline bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info, 193 struct extent_buffer *eb, 194 struct btrfs_block_group **cache_ret) 195 { 196 return true; 197 } 198 199 static inline void btrfs_revert_meta_write_pointer( 200 struct btrfs_block_group *cache, 201 struct extent_buffer *eb) 202 { 203 } 204 205 static inline int btrfs_zoned_issue_zeroout(struct btrfs_device *device, 206 u64 physical, u64 length) 207 { 208 return -EOPNOTSUPP; 209 } 210 211 static inline int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, 212 u64 logical, u64 physical_start, 213 u64 physical_pos) 214 { 215 return -EOPNOTSUPP; 216 } 217 218 static inline bool btrfs_zone_activate(struct btrfs_block_group *block_group) 219 { 220 return true; 221 } 222 223 static inline int btrfs_zone_finish(struct btrfs_block_group *block_group) 224 { 225 return 0; 226 } 227 228 static inline bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, 229 u64 flags) 230 { 231 return true; 232 } 233 234 static inline void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, 235 u64 logical, u64 length) { } 236 237 static inline void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg, 238 struct extent_buffer *eb) { } 239 240 static inline void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg) { } 241 242 static inline void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info) { } 243 244 static inline bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info) 245 { 246 return false; 247 } 248 249 static inline void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info, 250 u64 logical, u64 length) { } 251 252 static inline int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info) 253 { 254 return 1; 255 } 256 257 static inline int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info, 258 struct btrfs_space_info *space_info, 259 bool do_finish) 260 { 261 /* Consider all the block groups are active */ 262 return 0; 263 } 264 265 #endif 266 267 static inline bool btrfs_dev_is_sequential(struct btrfs_device *device, u64 pos) 268 { 269 struct btrfs_zoned_device_info *zone_info = device->zone_info; 270 271 if (!zone_info) 272 return false; 273 274 return test_bit(pos >> zone_info->zone_size_shift, zone_info->seq_zones); 275 } 276 277 static inline bool btrfs_dev_is_empty_zone(struct btrfs_device *device, u64 pos) 278 { 279 struct btrfs_zoned_device_info *zone_info = device->zone_info; 280 281 if (!zone_info) 282 return true; 283 284 return test_bit(pos >> zone_info->zone_size_shift, zone_info->empty_zones); 285 } 286 287 static inline void btrfs_dev_set_empty_zone_bit(struct btrfs_device *device, 288 u64 pos, bool set) 289 { 290 struct btrfs_zoned_device_info *zone_info = device->zone_info; 291 unsigned int zno; 292 293 if (!zone_info) 294 return; 295 296 zno = pos >> zone_info->zone_size_shift; 297 if (set) 298 set_bit(zno, zone_info->empty_zones); 299 else 300 clear_bit(zno, zone_info->empty_zones); 301 } 302 303 static inline void btrfs_dev_set_zone_empty(struct btrfs_device *device, u64 pos) 304 { 305 btrfs_dev_set_empty_zone_bit(device, pos, true); 306 } 307 308 static inline void btrfs_dev_clear_zone_empty(struct btrfs_device *device, u64 pos) 309 { 310 btrfs_dev_set_empty_zone_bit(device, pos, false); 311 } 312 313 static inline bool btrfs_check_device_zone_type(const struct btrfs_fs_info *fs_info, 314 struct block_device *bdev) 315 { 316 if (btrfs_is_zoned(fs_info)) { 317 /* 318 * We can allow a regular device on a zoned filesystem, because 319 * we will emulate the zoned capabilities. 320 */ 321 if (!bdev_is_zoned(bdev)) 322 return true; 323 324 return fs_info->zone_size == 325 (bdev_zone_sectors(bdev) << SECTOR_SHIFT); 326 } 327 328 /* Do not allow Host Manged zoned device */ 329 return bdev_zoned_model(bdev) != BLK_ZONED_HM; 330 } 331 332 static inline bool btrfs_check_super_location(struct btrfs_device *device, u64 pos) 333 { 334 /* 335 * On a non-zoned device, any address is OK. On a zoned device, 336 * non-SEQUENTIAL WRITE REQUIRED zones are capable. 337 */ 338 return device->zone_info == NULL || !btrfs_dev_is_sequential(device, pos); 339 } 340 341 static inline bool btrfs_can_zone_reset(struct btrfs_device *device, 342 u64 physical, u64 length) 343 { 344 u64 zone_size; 345 346 if (!btrfs_dev_is_sequential(device, physical)) 347 return false; 348 349 zone_size = device->zone_info->zone_size; 350 if (!IS_ALIGNED(physical, zone_size) || !IS_ALIGNED(length, zone_size)) 351 return false; 352 353 return true; 354 } 355 356 static inline void btrfs_zoned_meta_io_lock(struct btrfs_fs_info *fs_info) 357 { 358 if (!btrfs_is_zoned(fs_info)) 359 return; 360 mutex_lock(&fs_info->zoned_meta_io_lock); 361 } 362 363 static inline void btrfs_zoned_meta_io_unlock(struct btrfs_fs_info *fs_info) 364 { 365 if (!btrfs_is_zoned(fs_info)) 366 return; 367 mutex_unlock(&fs_info->zoned_meta_io_lock); 368 } 369 370 static inline void btrfs_clear_treelog_bg(struct btrfs_block_group *bg) 371 { 372 struct btrfs_fs_info *fs_info = bg->fs_info; 373 374 if (!btrfs_is_zoned(fs_info)) 375 return; 376 377 spin_lock(&fs_info->treelog_bg_lock); 378 if (fs_info->treelog_bg == bg->start) 379 fs_info->treelog_bg = 0; 380 spin_unlock(&fs_info->treelog_bg_lock); 381 } 382 383 static inline void btrfs_zoned_data_reloc_lock(struct btrfs_inode *inode) 384 { 385 struct btrfs_root *root = inode->root; 386 387 if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info)) 388 mutex_lock(&root->fs_info->zoned_data_reloc_io_lock); 389 } 390 391 static inline void btrfs_zoned_data_reloc_unlock(struct btrfs_inode *inode) 392 { 393 struct btrfs_root *root = inode->root; 394 395 if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info)) 396 mutex_unlock(&root->fs_info->zoned_data_reloc_io_lock); 397 } 398 399 static inline bool btrfs_zoned_bg_is_full(const struct btrfs_block_group *bg) 400 { 401 ASSERT(btrfs_is_zoned(bg->fs_info)); 402 return (bg->alloc_offset == bg->zone_capacity); 403 } 404 405 #endif 406