| 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/atomic.h> |
| 8 | #include <linux/blkdev.h> |
| 9 | #include <linux/blkzoned.h> |
| 10 | #include <linux/errno.h> |
| 11 | #include <linux/spinlock.h> |
| 12 | #include <linux/mutex.h> |
| 13 | #include "messages.h" |
| 14 | #include "volumes.h" |
| 15 | #include "disk-io.h" |
| 16 | #include "block-group.h" |
| 17 | #include "btrfs_inode.h" |
| 18 | |
| 19 | struct block_device; |
| 20 | struct extent_buffer; |
| 21 | struct btrfs_bio; |
| 22 | struct btrfs_ordered_extent; |
| 23 | struct btrfs_fs_info; |
| 24 | struct btrfs_space_info; |
| 25 | struct btrfs_eb_write_context; |
| 26 | struct btrfs_fs_devices; |
| 27 | |
| 28 | #define BTRFS_DEFAULT_RECLAIM_THRESH (75) |
| 29 | |
| 30 | struct btrfs_zoned_device_info { |
| 31 | /* |
| 32 | * Number of zones, zone size and types of zones if bdev is a |
| 33 | * zoned block device. |
| 34 | */ |
| 35 | u64 zone_size; |
| 36 | u8 zone_size_shift; |
| 37 | u32 nr_zones; |
| 38 | unsigned int max_active_zones; |
| 39 | /* |
| 40 | * Reserved active zones for one metadata and one system block group. |
| 41 | * It can vary per-device depending on the allocation status. |
| 42 | */ |
| 43 | int reserved_active_zones; |
| 44 | atomic_t active_zones_left; |
| 45 | unsigned long *seq_zones; |
| 46 | unsigned long *empty_zones; |
| 47 | unsigned long *active_zones; |
| 48 | struct blk_zone *zone_cache; |
| 49 | struct blk_zone sb_zones[2 * BTRFS_SUPER_MIRROR_MAX]; |
| 50 | }; |
| 51 | |
| 52 | void btrfs_finish_ordered_zoned(struct btrfs_ordered_extent *ordered); |
| 53 | |
| 54 | #ifdef CONFIG_BLK_DEV_ZONED |
| 55 | int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info); |
| 56 | int btrfs_get_dev_zone_info(struct btrfs_device *device, bool populate_cache); |
| 57 | void btrfs_destroy_dev_zone_info(struct btrfs_device *device); |
| 58 | struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info(struct btrfs_device *orig_dev); |
| 59 | int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info); |
| 60 | int btrfs_check_mountopts_zoned(const struct btrfs_fs_info *info, |
| 61 | unsigned long long *mount_opt); |
| 62 | int btrfs_sb_log_location_bdev(struct block_device *bdev, int mirror, int rw, |
| 63 | u64 *bytenr_ret); |
| 64 | int btrfs_sb_log_location(struct btrfs_device *device, int mirror, int rw, |
| 65 | u64 *bytenr_ret); |
| 66 | int btrfs_advance_sb_log(struct btrfs_device *device, int mirror); |
| 67 | int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror); |
| 68 | u64 btrfs_find_allocatable_zones(struct btrfs_device *device, u64 hole_start, |
| 69 | u64 hole_end, u64 num_bytes); |
| 70 | int btrfs_reset_device_zone(struct btrfs_device *device, u64 physical, |
| 71 | u64 length, u64 *bytes); |
| 72 | int btrfs_ensure_empty_zones(struct btrfs_device *device, u64 start, u64 size); |
| 73 | int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache, bool new); |
| 74 | void btrfs_calc_zone_unusable(struct btrfs_block_group *cache); |
| 75 | bool btrfs_use_zone_append(struct btrfs_bio *bbio); |
| 76 | void btrfs_record_physical_zoned(struct btrfs_bio *bbio); |
| 77 | int btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info, |
| 78 | struct btrfs_eb_write_context *ctx); |
| 79 | int btrfs_zoned_issue_zeroout(struct btrfs_device *device, u64 physical, u64 length); |
| 80 | int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, u64 logical, |
| 81 | u64 physical_start, u64 physical_pos); |
| 82 | bool btrfs_zone_activate(struct btrfs_block_group *block_group); |
| 83 | int btrfs_zone_finish(struct btrfs_block_group *block_group); |
| 84 | bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, u64 flags); |
| 85 | int btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical, |
| 86 | u64 length); |
| 87 | void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg, |
| 88 | struct extent_buffer *eb); |
| 89 | void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg); |
| 90 | void btrfs_zoned_reserve_data_reloc_bg(struct btrfs_fs_info *fs_info); |
| 91 | void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info); |
| 92 | bool btrfs_zoned_should_reclaim(const struct btrfs_fs_info *fs_info); |
| 93 | void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info, u64 logical, |
| 94 | u64 length); |
| 95 | int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info); |
| 96 | int btrfs_zoned_activate_one_bg(struct btrfs_space_info *space_info, bool do_finish); |
| 97 | void btrfs_check_active_zone_reservation(struct btrfs_fs_info *fs_info); |
| 98 | int btrfs_reset_unused_block_groups(struct btrfs_space_info *space_info, u64 num_bytes); |
| 99 | #else /* CONFIG_BLK_DEV_ZONED */ |
| 100 | |
| 101 | static inline int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info) |
| 102 | { |
| 103 | return 0; |
| 104 | } |
| 105 | |
| 106 | static inline int btrfs_get_dev_zone_info(struct btrfs_device *device, |
| 107 | bool populate_cache) |
| 108 | { |
| 109 | return 0; |
| 110 | } |
| 111 | |
| 112 | static inline void btrfs_destroy_dev_zone_info(struct btrfs_device *device) { } |
| 113 | |
| 114 | /* |
| 115 | * In case the kernel is compiled without CONFIG_BLK_DEV_ZONED we'll never call |
| 116 | * into btrfs_clone_dev_zone_info() so it's safe to return NULL here. |
| 117 | */ |
| 118 | static inline struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info( |
| 119 | struct btrfs_device *orig_dev) |
| 120 | { |
| 121 | return NULL; |
| 122 | } |
| 123 | |
| 124 | static inline int btrfs_check_zoned_mode(const struct btrfs_fs_info *fs_info) |
| 125 | { |
| 126 | if (!btrfs_is_zoned(fs_info)) |
| 127 | return 0; |
| 128 | |
| 129 | btrfs_err(fs_info, "zoned block devices support is not enabled" ); |
| 130 | return -EOPNOTSUPP; |
| 131 | } |
| 132 | |
| 133 | static inline int btrfs_check_mountopts_zoned(const struct btrfs_fs_info *info, |
| 134 | unsigned long long *mount_opt) |
| 135 | { |
| 136 | return 0; |
| 137 | } |
| 138 | |
| 139 | static inline int btrfs_sb_log_location_bdev(struct block_device *bdev, |
| 140 | int mirror, int rw, u64 *bytenr_ret) |
| 141 | { |
| 142 | *bytenr_ret = btrfs_sb_offset(mirror); |
| 143 | return 0; |
| 144 | } |
| 145 | |
| 146 | static inline int btrfs_sb_log_location(struct btrfs_device *device, int mirror, |
| 147 | int rw, u64 *bytenr_ret) |
| 148 | { |
| 149 | *bytenr_ret = btrfs_sb_offset(mirror); |
| 150 | return 0; |
| 151 | } |
| 152 | |
| 153 | static inline int btrfs_advance_sb_log(struct btrfs_device *device, int mirror) |
| 154 | { |
| 155 | return 0; |
| 156 | } |
| 157 | |
| 158 | static inline int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror) |
| 159 | { |
| 160 | return 0; |
| 161 | } |
| 162 | |
| 163 | static inline u64 btrfs_find_allocatable_zones(struct btrfs_device *device, |
| 164 | u64 hole_start, u64 hole_end, |
| 165 | u64 num_bytes) |
| 166 | { |
| 167 | return hole_start; |
| 168 | } |
| 169 | |
| 170 | static inline int btrfs_reset_device_zone(struct btrfs_device *device, |
| 171 | u64 physical, u64 length, u64 *bytes) |
| 172 | { |
| 173 | *bytes = 0; |
| 174 | return 0; |
| 175 | } |
| 176 | |
| 177 | static inline int btrfs_ensure_empty_zones(struct btrfs_device *device, |
| 178 | u64 start, u64 size) |
| 179 | { |
| 180 | return 0; |
| 181 | } |
| 182 | |
| 183 | static inline int btrfs_load_block_group_zone_info( |
| 184 | struct btrfs_block_group *cache, bool new) |
| 185 | { |
| 186 | return 0; |
| 187 | } |
| 188 | |
| 189 | static inline void btrfs_calc_zone_unusable(struct btrfs_block_group *cache) { } |
| 190 | |
| 191 | static inline bool btrfs_use_zone_append(struct btrfs_bio *bbio) |
| 192 | { |
| 193 | return false; |
| 194 | } |
| 195 | |
| 196 | static inline void btrfs_record_physical_zoned(struct btrfs_bio *bbio) |
| 197 | { |
| 198 | } |
| 199 | |
| 200 | static inline int btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info, |
| 201 | struct btrfs_eb_write_context *ctx) |
| 202 | { |
| 203 | return 0; |
| 204 | } |
| 205 | |
| 206 | static inline int btrfs_zoned_issue_zeroout(struct btrfs_device *device, |
| 207 | u64 physical, u64 length) |
| 208 | { |
| 209 | return -EOPNOTSUPP; |
| 210 | } |
| 211 | |
| 212 | static inline int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, |
| 213 | u64 logical, u64 physical_start, |
| 214 | u64 physical_pos) |
| 215 | { |
| 216 | return -EOPNOTSUPP; |
| 217 | } |
| 218 | |
| 219 | static inline bool btrfs_zone_activate(struct btrfs_block_group *block_group) |
| 220 | { |
| 221 | return true; |
| 222 | } |
| 223 | |
| 224 | static inline int btrfs_zone_finish(struct btrfs_block_group *block_group) |
| 225 | { |
| 226 | return 0; |
| 227 | } |
| 228 | |
| 229 | static inline bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, |
| 230 | u64 flags) |
| 231 | { |
| 232 | return true; |
| 233 | } |
| 234 | |
| 235 | static inline int btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, |
| 236 | u64 logical, u64 length) |
| 237 | { |
| 238 | return 0; |
| 239 | } |
| 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_zoned_reserve_data_reloc_bg(struct btrfs_fs_info *fs_info) { } |
| 247 | |
| 248 | static inline void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info) { } |
| 249 | |
| 250 | static inline bool btrfs_zoned_should_reclaim(const struct btrfs_fs_info *fs_info) |
| 251 | { |
| 252 | return false; |
| 253 | } |
| 254 | |
| 255 | static inline void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info, |
| 256 | u64 logical, u64 length) { } |
| 257 | |
| 258 | static inline int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info) |
| 259 | { |
| 260 | return 1; |
| 261 | } |
| 262 | |
| 263 | static inline int btrfs_zoned_activate_one_bg(struct btrfs_space_info *space_info, |
| 264 | bool do_finish) |
| 265 | { |
| 266 | /* Consider all the block groups are active */ |
| 267 | return 0; |
| 268 | } |
| 269 | |
| 270 | static inline void btrfs_check_active_zone_reservation(struct btrfs_fs_info *fs_info) { } |
| 271 | |
| 272 | static inline int btrfs_reset_unused_block_groups(struct btrfs_space_info *space_info, |
| 273 | u64 num_bytes) |
| 274 | { |
| 275 | return 0; |
| 276 | } |
| 277 | |
| 278 | #endif |
| 279 | |
| 280 | static inline bool btrfs_dev_is_sequential(struct btrfs_device *device, u64 pos) |
| 281 | { |
| 282 | struct btrfs_zoned_device_info *zone_info = device->zone_info; |
| 283 | |
| 284 | if (!zone_info) |
| 285 | return false; |
| 286 | |
| 287 | return test_bit(pos >> zone_info->zone_size_shift, zone_info->seq_zones); |
| 288 | } |
| 289 | |
| 290 | static inline bool btrfs_dev_is_empty_zone(struct btrfs_device *device, u64 pos) |
| 291 | { |
| 292 | struct btrfs_zoned_device_info *zone_info = device->zone_info; |
| 293 | |
| 294 | if (!zone_info) |
| 295 | return true; |
| 296 | |
| 297 | return test_bit(pos >> zone_info->zone_size_shift, zone_info->empty_zones); |
| 298 | } |
| 299 | |
| 300 | static inline void btrfs_dev_set_empty_zone_bit(struct btrfs_device *device, |
| 301 | u64 pos, bool set) |
| 302 | { |
| 303 | struct btrfs_zoned_device_info *zone_info = device->zone_info; |
| 304 | unsigned int zno; |
| 305 | |
| 306 | if (!zone_info) |
| 307 | return; |
| 308 | |
| 309 | zno = pos >> zone_info->zone_size_shift; |
| 310 | if (set) |
| 311 | set_bit(nr: zno, addr: zone_info->empty_zones); |
| 312 | else |
| 313 | clear_bit(nr: zno, addr: zone_info->empty_zones); |
| 314 | } |
| 315 | |
| 316 | static inline void btrfs_dev_set_zone_empty(struct btrfs_device *device, u64 pos) |
| 317 | { |
| 318 | btrfs_dev_set_empty_zone_bit(device, pos, set: true); |
| 319 | } |
| 320 | |
| 321 | static inline void btrfs_dev_clear_zone_empty(struct btrfs_device *device, u64 pos) |
| 322 | { |
| 323 | btrfs_dev_set_empty_zone_bit(device, pos, set: false); |
| 324 | } |
| 325 | |
| 326 | static inline bool btrfs_check_device_zone_type(const struct btrfs_fs_info *fs_info, |
| 327 | struct block_device *bdev) |
| 328 | { |
| 329 | if (btrfs_is_zoned(fs_info)) { |
| 330 | /* |
| 331 | * We can allow a regular device on a zoned filesystem, because |
| 332 | * we will emulate the zoned capabilities. |
| 333 | */ |
| 334 | if (!bdev_is_zoned(bdev)) |
| 335 | return true; |
| 336 | |
| 337 | return fs_info->zone_size == |
| 338 | (bdev_zone_sectors(bdev) << SECTOR_SHIFT); |
| 339 | } |
| 340 | |
| 341 | /* Do not allow Host Managed zoned device. */ |
| 342 | return !bdev_is_zoned(bdev); |
| 343 | } |
| 344 | |
| 345 | static inline bool btrfs_check_super_location(struct btrfs_device *device, u64 pos) |
| 346 | { |
| 347 | /* |
| 348 | * On a non-zoned device, any address is OK. On a zoned device, |
| 349 | * non-SEQUENTIAL WRITE REQUIRED zones are capable. |
| 350 | */ |
| 351 | return device->zone_info == NULL || !btrfs_dev_is_sequential(device, pos); |
| 352 | } |
| 353 | |
| 354 | static inline bool btrfs_can_zone_reset(struct btrfs_device *device, |
| 355 | u64 physical, u64 length) |
| 356 | { |
| 357 | u64 zone_size; |
| 358 | |
| 359 | if (!btrfs_dev_is_sequential(device, pos: physical)) |
| 360 | return false; |
| 361 | |
| 362 | zone_size = device->zone_info->zone_size; |
| 363 | if (!IS_ALIGNED(physical, zone_size) || !IS_ALIGNED(length, zone_size)) |
| 364 | return false; |
| 365 | |
| 366 | return true; |
| 367 | } |
| 368 | |
| 369 | static inline void btrfs_zoned_meta_io_lock(struct btrfs_fs_info *fs_info) |
| 370 | { |
| 371 | if (!btrfs_is_zoned(fs_info)) |
| 372 | return; |
| 373 | mutex_lock(&fs_info->zoned_meta_io_lock); |
| 374 | } |
| 375 | |
| 376 | static inline void btrfs_zoned_meta_io_unlock(struct btrfs_fs_info *fs_info) |
| 377 | { |
| 378 | if (!btrfs_is_zoned(fs_info)) |
| 379 | return; |
| 380 | mutex_unlock(lock: &fs_info->zoned_meta_io_lock); |
| 381 | } |
| 382 | |
| 383 | static inline void btrfs_clear_treelog_bg(struct btrfs_block_group *bg) |
| 384 | { |
| 385 | struct btrfs_fs_info *fs_info = bg->fs_info; |
| 386 | |
| 387 | if (!btrfs_is_zoned(fs_info)) |
| 388 | return; |
| 389 | |
| 390 | spin_lock(lock: &fs_info->treelog_bg_lock); |
| 391 | if (fs_info->treelog_bg == bg->start) |
| 392 | fs_info->treelog_bg = 0; |
| 393 | spin_unlock(lock: &fs_info->treelog_bg_lock); |
| 394 | } |
| 395 | |
| 396 | static inline void btrfs_zoned_data_reloc_lock(struct btrfs_inode *inode) |
| 397 | { |
| 398 | struct btrfs_root *root = inode->root; |
| 399 | |
| 400 | if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(fs_info: root->fs_info)) |
| 401 | mutex_lock(&root->fs_info->zoned_data_reloc_io_lock); |
| 402 | } |
| 403 | |
| 404 | static inline void btrfs_zoned_data_reloc_unlock(struct btrfs_inode *inode) |
| 405 | { |
| 406 | struct btrfs_root *root = inode->root; |
| 407 | |
| 408 | if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(fs_info: root->fs_info)) |
| 409 | mutex_unlock(lock: &root->fs_info->zoned_data_reloc_io_lock); |
| 410 | } |
| 411 | |
| 412 | static inline bool btrfs_zoned_bg_is_full(const struct btrfs_block_group *bg) |
| 413 | { |
| 414 | ASSERT(btrfs_is_zoned(bg->fs_info)); |
| 415 | return (bg->alloc_offset == bg->zone_capacity); |
| 416 | } |
| 417 | |
| 418 | #endif |
| 419 | |