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