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 #include "fs.h" 19 20 struct block_device; 21 struct extent_buffer; 22 struct btrfs_bio; 23 struct btrfs_ordered_extent; 24 struct btrfs_fs_info; 25 struct btrfs_space_info; 26 struct btrfs_eb_write_context; 27 struct btrfs_fs_devices; 28 29 #define BTRFS_DEFAULT_RECLAIM_THRESH (75) 30 31 struct btrfs_zoned_device_info { 32 /* 33 * Number of zones, zone size and types of zones if bdev is a 34 * zoned block device. 35 */ 36 u64 zone_size; 37 u8 zone_size_shift; 38 u32 nr_zones; 39 unsigned int max_active_zones; 40 /* 41 * Reserved active zones for one metadata and one system block group. 42 * It can vary per-device depending on the allocation status. 43 */ 44 int reserved_active_zones; 45 atomic_t active_zones_left; 46 unsigned long *seq_zones; 47 unsigned long *empty_zones; 48 unsigned long *active_zones; 49 struct blk_zone *zone_cache; 50 struct blk_zone sb_zones[2 * BTRFS_SUPER_MIRROR_MAX]; 51 }; 52 53 void btrfs_finish_ordered_zoned(struct btrfs_ordered_extent *ordered); 54 55 #ifdef CONFIG_BLK_DEV_ZONED 56 int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info); 57 int btrfs_get_dev_zone_info(struct btrfs_device *device, bool populate_cache); 58 void btrfs_destroy_dev_zone_info(struct btrfs_device *device); 59 struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info(struct btrfs_device *orig_dev); 60 int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info); 61 int btrfs_check_mountopts_zoned(const struct btrfs_fs_info *info, 62 unsigned long long *mount_opt); 63 int btrfs_sb_log_location_bdev(struct block_device *bdev, int mirror, int rw, 64 u64 *bytenr_ret); 65 int btrfs_sb_log_location(struct btrfs_device *device, int mirror, int rw, 66 u64 *bytenr_ret); 67 int btrfs_advance_sb_log(struct btrfs_device *device, int mirror); 68 int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror); 69 u64 btrfs_find_allocatable_zones(struct btrfs_device *device, u64 hole_start, 70 u64 hole_end, u64 num_bytes); 71 int btrfs_reset_device_zone(struct btrfs_device *device, u64 physical, 72 u64 length, u64 *bytes); 73 int btrfs_ensure_empty_zones(struct btrfs_device *device, u64 start, u64 size); 74 int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache, bool new); 75 void btrfs_calc_zone_unusable(struct btrfs_block_group *cache); 76 bool btrfs_use_zone_append(struct btrfs_bio *bbio); 77 void btrfs_record_physical_zoned(struct btrfs_bio *bbio); 78 int btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info, 79 struct btrfs_eb_write_context *ctx); 80 int btrfs_zoned_issue_zeroout(struct btrfs_device *device, u64 physical, u64 length); 81 int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, u64 logical, 82 u64 physical_start, u64 physical_pos); 83 bool btrfs_zone_activate(struct btrfs_block_group *block_group); 84 int btrfs_zone_finish(struct btrfs_block_group *block_group); 85 bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, u64 flags); 86 void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical, 87 u64 length); 88 void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg, 89 struct extent_buffer *eb); 90 void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg); 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_fs_info *fs_info, 97 struct btrfs_space_info *space_info, bool do_finish); 98 void btrfs_check_active_zone_reservation(struct btrfs_fs_info *fs_info); 99 int btrfs_reset_unused_block_groups(struct btrfs_space_info *space_info, u64 num_bytes); 100 #else /* CONFIG_BLK_DEV_ZONED */ 101 102 static inline int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info) 103 { 104 return 0; 105 } 106 107 static inline int btrfs_get_dev_zone_info(struct btrfs_device *device, 108 bool populate_cache) 109 { 110 return 0; 111 } 112 113 static inline void btrfs_destroy_dev_zone_info(struct btrfs_device *device) { } 114 115 /* 116 * In case the kernel is compiled without CONFIG_BLK_DEV_ZONED we'll never call 117 * into btrfs_clone_dev_zone_info() so it's safe to return NULL here. 118 */ 119 static inline struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info( 120 struct btrfs_device *orig_dev) 121 { 122 return NULL; 123 } 124 125 static inline int btrfs_check_zoned_mode(const struct btrfs_fs_info *fs_info) 126 { 127 if (!btrfs_is_zoned(fs_info)) 128 return 0; 129 130 btrfs_err(fs_info, "zoned block devices support is not enabled"); 131 return -EOPNOTSUPP; 132 } 133 134 static inline int btrfs_check_mountopts_zoned(const struct btrfs_fs_info *info, 135 unsigned long long *mount_opt) 136 { 137 return 0; 138 } 139 140 static inline int btrfs_sb_log_location_bdev(struct block_device *bdev, 141 int mirror, int rw, u64 *bytenr_ret) 142 { 143 *bytenr_ret = btrfs_sb_offset(mirror); 144 return 0; 145 } 146 147 static inline int btrfs_sb_log_location(struct btrfs_device *device, int mirror, 148 int rw, u64 *bytenr_ret) 149 { 150 *bytenr_ret = btrfs_sb_offset(mirror); 151 return 0; 152 } 153 154 static inline int btrfs_advance_sb_log(struct btrfs_device *device, int mirror) 155 { 156 return 0; 157 } 158 159 static inline int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror) 160 { 161 return 0; 162 } 163 164 static inline u64 btrfs_find_allocatable_zones(struct btrfs_device *device, 165 u64 hole_start, u64 hole_end, 166 u64 num_bytes) 167 { 168 return hole_start; 169 } 170 171 static inline int btrfs_reset_device_zone(struct btrfs_device *device, 172 u64 physical, u64 length, u64 *bytes) 173 { 174 *bytes = 0; 175 return 0; 176 } 177 178 static inline int btrfs_ensure_empty_zones(struct btrfs_device *device, 179 u64 start, u64 size) 180 { 181 return 0; 182 } 183 184 static inline int btrfs_load_block_group_zone_info( 185 struct btrfs_block_group *cache, bool new) 186 { 187 return 0; 188 } 189 190 static inline void btrfs_calc_zone_unusable(struct btrfs_block_group *cache) { } 191 192 static inline bool btrfs_use_zone_append(struct btrfs_bio *bbio) 193 { 194 return false; 195 } 196 197 static inline void btrfs_record_physical_zoned(struct btrfs_bio *bbio) 198 { 199 } 200 201 static inline int btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info, 202 struct btrfs_eb_write_context *ctx) 203 { 204 return 0; 205 } 206 207 static inline int btrfs_zoned_issue_zeroout(struct btrfs_device *device, 208 u64 physical, u64 length) 209 { 210 return -EOPNOTSUPP; 211 } 212 213 static inline int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, 214 u64 logical, u64 physical_start, 215 u64 physical_pos) 216 { 217 return -EOPNOTSUPP; 218 } 219 220 static inline bool btrfs_zone_activate(struct btrfs_block_group *block_group) 221 { 222 return true; 223 } 224 225 static inline int btrfs_zone_finish(struct btrfs_block_group *block_group) 226 { 227 return 0; 228 } 229 230 static inline bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, 231 u64 flags) 232 { 233 return true; 234 } 235 236 static inline void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, 237 u64 logical, u64 length) { } 238 239 static inline void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg, 240 struct extent_buffer *eb) { } 241 242 static inline void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg) { } 243 244 static inline void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info) { } 245 246 static inline bool btrfs_zoned_should_reclaim(const struct btrfs_fs_info *fs_info) 247 { 248 return false; 249 } 250 251 static inline void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info, 252 u64 logical, u64 length) { } 253 254 static inline int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info) 255 { 256 return 1; 257 } 258 259 static inline int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info, 260 struct btrfs_space_info *space_info, 261 bool do_finish) 262 { 263 /* Consider all the block groups are active */ 264 return 0; 265 } 266 267 static inline void btrfs_check_active_zone_reservation(struct btrfs_fs_info *fs_info) { } 268 269 static inline int btrfs_reset_unused_block_groups(struct btrfs_space_info *space_info, 270 u64 num_bytes) 271 { 272 return 0; 273 } 274 275 #endif 276 277 static inline bool btrfs_dev_is_sequential(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 false; 283 284 return test_bit(pos >> zone_info->zone_size_shift, zone_info->seq_zones); 285 } 286 287 static inline bool btrfs_dev_is_empty_zone(struct btrfs_device *device, u64 pos) 288 { 289 struct btrfs_zoned_device_info *zone_info = device->zone_info; 290 291 if (!zone_info) 292 return true; 293 294 return test_bit(pos >> zone_info->zone_size_shift, zone_info->empty_zones); 295 } 296 297 static inline void btrfs_dev_set_empty_zone_bit(struct btrfs_device *device, 298 u64 pos, bool set) 299 { 300 struct btrfs_zoned_device_info *zone_info = device->zone_info; 301 unsigned int zno; 302 303 if (!zone_info) 304 return; 305 306 zno = pos >> zone_info->zone_size_shift; 307 if (set) 308 set_bit(zno, zone_info->empty_zones); 309 else 310 clear_bit(zno, zone_info->empty_zones); 311 } 312 313 static inline void btrfs_dev_set_zone_empty(struct btrfs_device *device, u64 pos) 314 { 315 btrfs_dev_set_empty_zone_bit(device, pos, true); 316 } 317 318 static inline void btrfs_dev_clear_zone_empty(struct btrfs_device *device, u64 pos) 319 { 320 btrfs_dev_set_empty_zone_bit(device, pos, false); 321 } 322 323 static inline bool btrfs_check_device_zone_type(const struct btrfs_fs_info *fs_info, 324 struct block_device *bdev) 325 { 326 if (btrfs_is_zoned(fs_info)) { 327 /* 328 * We can allow a regular device on a zoned filesystem, because 329 * we will emulate the zoned capabilities. 330 */ 331 if (!bdev_is_zoned(bdev)) 332 return true; 333 334 return fs_info->zone_size == 335 (bdev_zone_sectors(bdev) << SECTOR_SHIFT); 336 } 337 338 /* Do not allow Host Managed zoned device. */ 339 return !bdev_is_zoned(bdev); 340 } 341 342 static inline bool btrfs_check_super_location(struct btrfs_device *device, u64 pos) 343 { 344 /* 345 * On a non-zoned device, any address is OK. On a zoned device, 346 * non-SEQUENTIAL WRITE REQUIRED zones are capable. 347 */ 348 return device->zone_info == NULL || !btrfs_dev_is_sequential(device, pos); 349 } 350 351 static inline bool btrfs_can_zone_reset(struct btrfs_device *device, 352 u64 physical, u64 length) 353 { 354 u64 zone_size; 355 356 if (!btrfs_dev_is_sequential(device, physical)) 357 return false; 358 359 zone_size = device->zone_info->zone_size; 360 if (!IS_ALIGNED(physical, zone_size) || !IS_ALIGNED(length, zone_size)) 361 return false; 362 363 return true; 364 } 365 366 static inline void btrfs_zoned_meta_io_lock(struct btrfs_fs_info *fs_info) 367 { 368 if (!btrfs_is_zoned(fs_info)) 369 return; 370 mutex_lock(&fs_info->zoned_meta_io_lock); 371 } 372 373 static inline void btrfs_zoned_meta_io_unlock(struct btrfs_fs_info *fs_info) 374 { 375 if (!btrfs_is_zoned(fs_info)) 376 return; 377 mutex_unlock(&fs_info->zoned_meta_io_lock); 378 } 379 380 static inline void btrfs_clear_treelog_bg(struct btrfs_block_group *bg) 381 { 382 struct btrfs_fs_info *fs_info = bg->fs_info; 383 384 if (!btrfs_is_zoned(fs_info)) 385 return; 386 387 spin_lock(&fs_info->treelog_bg_lock); 388 if (fs_info->treelog_bg == bg->start) 389 fs_info->treelog_bg = 0; 390 spin_unlock(&fs_info->treelog_bg_lock); 391 } 392 393 static inline void btrfs_zoned_data_reloc_lock(struct btrfs_inode *inode) 394 { 395 struct btrfs_root *root = inode->root; 396 397 if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info)) 398 mutex_lock(&root->fs_info->zoned_data_reloc_io_lock); 399 } 400 401 static inline void btrfs_zoned_data_reloc_unlock(struct btrfs_inode *inode) 402 { 403 struct btrfs_root *root = inode->root; 404 405 if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info)) 406 mutex_unlock(&root->fs_info->zoned_data_reloc_io_lock); 407 } 408 409 static inline bool btrfs_zoned_bg_is_full(const struct btrfs_block_group *bg) 410 { 411 ASSERT(btrfs_is_zoned(bg->fs_info)); 412 return (bg->alloc_offset == bg->zone_capacity); 413 } 414 415 #endif 416