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 u32 nr_zones; 23 unsigned int max_active_zones; 24 atomic_t active_zones_left; 25 unsigned long *seq_zones; 26 unsigned long *empty_zones; 27 unsigned long *active_zones; 28 struct blk_zone *zone_cache; 29 struct blk_zone sb_zones[2 * BTRFS_SUPER_MIRROR_MAX]; 30 }; 31 32 #ifdef CONFIG_BLK_DEV_ZONED 33 int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, 34 struct blk_zone *zone); 35 int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info); 36 int btrfs_get_dev_zone_info(struct btrfs_device *device, bool populate_cache); 37 void btrfs_destroy_dev_zone_info(struct btrfs_device *device); 38 int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info); 39 int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info); 40 int btrfs_sb_log_location_bdev(struct block_device *bdev, int mirror, int rw, 41 u64 *bytenr_ret); 42 int btrfs_sb_log_location(struct btrfs_device *device, int mirror, int rw, 43 u64 *bytenr_ret); 44 int btrfs_advance_sb_log(struct btrfs_device *device, int mirror); 45 int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror); 46 u64 btrfs_find_allocatable_zones(struct btrfs_device *device, u64 hole_start, 47 u64 hole_end, u64 num_bytes); 48 int btrfs_reset_device_zone(struct btrfs_device *device, u64 physical, 49 u64 length, u64 *bytes); 50 int btrfs_ensure_empty_zones(struct btrfs_device *device, u64 start, u64 size); 51 int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache, bool new); 52 void btrfs_calc_zone_unusable(struct btrfs_block_group *cache); 53 void btrfs_redirty_list_add(struct btrfs_transaction *trans, 54 struct extent_buffer *eb); 55 void btrfs_free_redirty_list(struct btrfs_transaction *trans); 56 bool btrfs_use_zone_append(struct btrfs_inode *inode, u64 start); 57 void btrfs_record_physical_zoned(struct inode *inode, u64 file_offset, 58 struct bio *bio); 59 void btrfs_rewrite_logical_zoned(struct btrfs_ordered_extent *ordered); 60 bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info, 61 struct extent_buffer *eb, 62 struct btrfs_block_group **cache_ret); 63 void btrfs_revert_meta_write_pointer(struct btrfs_block_group *cache, 64 struct extent_buffer *eb); 65 int btrfs_zoned_issue_zeroout(struct btrfs_device *device, u64 physical, u64 length); 66 int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, u64 logical, 67 u64 physical_start, u64 physical_pos); 68 struct btrfs_device *btrfs_zoned_get_device(struct btrfs_fs_info *fs_info, 69 u64 logical, u64 length); 70 bool btrfs_zone_activate(struct btrfs_block_group *block_group); 71 int btrfs_zone_finish(struct btrfs_block_group *block_group); 72 bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, u64 flags); 73 void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical, 74 u64 length); 75 void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg, 76 struct extent_buffer *eb); 77 void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg); 78 void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info); 79 bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info); 80 void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info, u64 logical, 81 u64 length); 82 #else /* CONFIG_BLK_DEV_ZONED */ 83 static inline int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, 84 struct blk_zone *zone) 85 { 86 return 0; 87 } 88 89 static inline int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info) 90 { 91 return 0; 92 } 93 94 static inline int btrfs_get_dev_zone_info(struct btrfs_device *device, 95 bool populate_cache) 96 { 97 return 0; 98 } 99 100 static inline void btrfs_destroy_dev_zone_info(struct btrfs_device *device) { } 101 102 static inline int btrfs_check_zoned_mode(const struct btrfs_fs_info *fs_info) 103 { 104 if (!btrfs_is_zoned(fs_info)) 105 return 0; 106 107 btrfs_err(fs_info, "zoned block devices support is not enabled"); 108 return -EOPNOTSUPP; 109 } 110 111 static inline int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info) 112 { 113 return 0; 114 } 115 116 static inline int btrfs_sb_log_location_bdev(struct block_device *bdev, 117 int mirror, int rw, u64 *bytenr_ret) 118 { 119 *bytenr_ret = btrfs_sb_offset(mirror); 120 return 0; 121 } 122 123 static inline int btrfs_sb_log_location(struct btrfs_device *device, int mirror, 124 int rw, u64 *bytenr_ret) 125 { 126 *bytenr_ret = btrfs_sb_offset(mirror); 127 return 0; 128 } 129 130 static inline int btrfs_advance_sb_log(struct btrfs_device *device, int mirror) 131 { 132 return 0; 133 } 134 135 static inline int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror) 136 { 137 return 0; 138 } 139 140 static inline u64 btrfs_find_allocatable_zones(struct btrfs_device *device, 141 u64 hole_start, u64 hole_end, 142 u64 num_bytes) 143 { 144 return hole_start; 145 } 146 147 static inline int btrfs_reset_device_zone(struct btrfs_device *device, 148 u64 physical, u64 length, u64 *bytes) 149 { 150 *bytes = 0; 151 return 0; 152 } 153 154 static inline int btrfs_ensure_empty_zones(struct btrfs_device *device, 155 u64 start, u64 size) 156 { 157 return 0; 158 } 159 160 static inline int btrfs_load_block_group_zone_info( 161 struct btrfs_block_group *cache, bool new) 162 { 163 return 0; 164 } 165 166 static inline void btrfs_calc_zone_unusable(struct btrfs_block_group *cache) { } 167 168 static inline void btrfs_redirty_list_add(struct btrfs_transaction *trans, 169 struct extent_buffer *eb) { } 170 static inline void btrfs_free_redirty_list(struct btrfs_transaction *trans) { } 171 172 static inline bool btrfs_use_zone_append(struct btrfs_inode *inode, u64 start) 173 { 174 return false; 175 } 176 177 static inline void btrfs_record_physical_zoned(struct inode *inode, 178 u64 file_offset, struct bio *bio) 179 { 180 } 181 182 static inline void btrfs_rewrite_logical_zoned( 183 struct btrfs_ordered_extent *ordered) { } 184 185 static inline bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info, 186 struct extent_buffer *eb, 187 struct btrfs_block_group **cache_ret) 188 { 189 return true; 190 } 191 192 static inline void btrfs_revert_meta_write_pointer( 193 struct btrfs_block_group *cache, 194 struct extent_buffer *eb) 195 { 196 } 197 198 static inline int btrfs_zoned_issue_zeroout(struct btrfs_device *device, 199 u64 physical, u64 length) 200 { 201 return -EOPNOTSUPP; 202 } 203 204 static inline int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, 205 u64 logical, u64 physical_start, 206 u64 physical_pos) 207 { 208 return -EOPNOTSUPP; 209 } 210 211 static inline struct btrfs_device *btrfs_zoned_get_device( 212 struct btrfs_fs_info *fs_info, 213 u64 logical, u64 length) 214 { 215 return ERR_PTR(-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 #endif 252 253 static inline bool btrfs_dev_is_sequential(struct btrfs_device *device, u64 pos) 254 { 255 struct btrfs_zoned_device_info *zone_info = device->zone_info; 256 257 if (!zone_info) 258 return false; 259 260 return test_bit(pos >> zone_info->zone_size_shift, zone_info->seq_zones); 261 } 262 263 static inline bool btrfs_dev_is_empty_zone(struct btrfs_device *device, u64 pos) 264 { 265 struct btrfs_zoned_device_info *zone_info = device->zone_info; 266 267 if (!zone_info) 268 return true; 269 270 return test_bit(pos >> zone_info->zone_size_shift, zone_info->empty_zones); 271 } 272 273 static inline void btrfs_dev_set_empty_zone_bit(struct btrfs_device *device, 274 u64 pos, bool set) 275 { 276 struct btrfs_zoned_device_info *zone_info = device->zone_info; 277 unsigned int zno; 278 279 if (!zone_info) 280 return; 281 282 zno = pos >> zone_info->zone_size_shift; 283 if (set) 284 set_bit(zno, zone_info->empty_zones); 285 else 286 clear_bit(zno, zone_info->empty_zones); 287 } 288 289 static inline void btrfs_dev_set_zone_empty(struct btrfs_device *device, u64 pos) 290 { 291 btrfs_dev_set_empty_zone_bit(device, pos, true); 292 } 293 294 static inline void btrfs_dev_clear_zone_empty(struct btrfs_device *device, u64 pos) 295 { 296 btrfs_dev_set_empty_zone_bit(device, pos, false); 297 } 298 299 static inline bool btrfs_check_device_zone_type(const struct btrfs_fs_info *fs_info, 300 struct block_device *bdev) 301 { 302 if (btrfs_is_zoned(fs_info)) { 303 /* 304 * We can allow a regular device on a zoned filesystem, because 305 * we will emulate the zoned capabilities. 306 */ 307 if (!bdev_is_zoned(bdev)) 308 return true; 309 310 return fs_info->zone_size == 311 (bdev_zone_sectors(bdev) << SECTOR_SHIFT); 312 } 313 314 /* Do not allow Host Manged zoned device */ 315 return bdev_zoned_model(bdev) != BLK_ZONED_HM; 316 } 317 318 static inline bool btrfs_check_super_location(struct btrfs_device *device, u64 pos) 319 { 320 /* 321 * On a non-zoned device, any address is OK. On a zoned device, 322 * non-SEQUENTIAL WRITE REQUIRED zones are capable. 323 */ 324 return device->zone_info == NULL || !btrfs_dev_is_sequential(device, pos); 325 } 326 327 static inline bool btrfs_can_zone_reset(struct btrfs_device *device, 328 u64 physical, u64 length) 329 { 330 u64 zone_size; 331 332 if (!btrfs_dev_is_sequential(device, physical)) 333 return false; 334 335 zone_size = device->zone_info->zone_size; 336 if (!IS_ALIGNED(physical, zone_size) || !IS_ALIGNED(length, zone_size)) 337 return false; 338 339 return true; 340 } 341 342 static inline void btrfs_zoned_meta_io_lock(struct btrfs_fs_info *fs_info) 343 { 344 if (!btrfs_is_zoned(fs_info)) 345 return; 346 mutex_lock(&fs_info->zoned_meta_io_lock); 347 } 348 349 static inline void btrfs_zoned_meta_io_unlock(struct btrfs_fs_info *fs_info) 350 { 351 if (!btrfs_is_zoned(fs_info)) 352 return; 353 mutex_unlock(&fs_info->zoned_meta_io_lock); 354 } 355 356 static inline void btrfs_clear_treelog_bg(struct btrfs_block_group *bg) 357 { 358 struct btrfs_fs_info *fs_info = bg->fs_info; 359 360 if (!btrfs_is_zoned(fs_info)) 361 return; 362 363 spin_lock(&fs_info->treelog_bg_lock); 364 if (fs_info->treelog_bg == bg->start) 365 fs_info->treelog_bg = 0; 366 spin_unlock(&fs_info->treelog_bg_lock); 367 } 368 369 static inline void btrfs_zoned_data_reloc_lock(struct btrfs_inode *inode) 370 { 371 struct btrfs_root *root = inode->root; 372 373 if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info)) 374 mutex_lock(&root->fs_info->zoned_data_reloc_io_lock); 375 } 376 377 static inline void btrfs_zoned_data_reloc_unlock(struct btrfs_inode *inode) 378 { 379 struct btrfs_root *root = inode->root; 380 381 if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info)) 382 mutex_unlock(&root->fs_info->zoned_data_reloc_io_lock); 383 } 384 385 static inline bool btrfs_zoned_bg_is_full(const struct btrfs_block_group *bg) 386 { 387 ASSERT(btrfs_is_zoned(bg->fs_info)); 388 return (bg->alloc_offset == bg->zone_capacity); 389 } 390 391 #endif 392