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