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(struct btrfs_device *device, u64 pos, 57 struct blk_zone *zone); 58 int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info); 59 int btrfs_get_dev_zone_info(struct btrfs_device *device, bool populate_cache); 60 void btrfs_destroy_dev_zone_info(struct btrfs_device *device); 61 struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info(struct btrfs_device *orig_dev); 62 int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info); 63 int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info, unsigned long *mount_opt); 64 int btrfs_sb_log_location_bdev(struct block_device *bdev, int mirror, int rw, 65 u64 *bytenr_ret); 66 int btrfs_sb_log_location(struct btrfs_device *device, int mirror, int rw, 67 u64 *bytenr_ret); 68 int btrfs_advance_sb_log(struct btrfs_device *device, int mirror); 69 int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror); 70 u64 btrfs_find_allocatable_zones(struct btrfs_device *device, u64 hole_start, 71 u64 hole_end, u64 num_bytes); 72 int btrfs_reset_device_zone(struct btrfs_device *device, u64 physical, 73 u64 length, u64 *bytes); 74 int btrfs_ensure_empty_zones(struct btrfs_device *device, u64 start, u64 size); 75 int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache, bool new); 76 void btrfs_calc_zone_unusable(struct btrfs_block_group *cache); 77 bool btrfs_use_zone_append(struct btrfs_bio *bbio); 78 void btrfs_record_physical_zoned(struct btrfs_bio *bbio); 79 int btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info, 80 struct btrfs_eb_write_context *ctx); 81 int btrfs_zoned_issue_zeroout(struct btrfs_device *device, u64 physical, u64 length); 82 int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, u64 logical, 83 u64 physical_start, u64 physical_pos); 84 bool btrfs_zone_activate(struct btrfs_block_group *block_group); 85 int btrfs_zone_finish(struct btrfs_block_group *block_group); 86 bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, u64 flags); 87 void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical, 88 u64 length); 89 void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg, 90 struct extent_buffer *eb); 91 void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg); 92 void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info); 93 bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info); 94 void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info, u64 logical, 95 u64 length); 96 int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info); 97 int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info, 98 struct btrfs_space_info *space_info, bool do_finish); 99 void btrfs_check_active_zone_reservation(struct btrfs_fs_info *fs_info); 100 #else /* CONFIG_BLK_DEV_ZONED */ 101 static inline int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, 102 struct blk_zone *zone) 103 { 104 return 0; 105 } 106 107 static inline int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info) 108 { 109 return 0; 110 } 111 112 static inline int btrfs_get_dev_zone_info(struct btrfs_device *device, 113 bool populate_cache) 114 { 115 return 0; 116 } 117 118 static inline void btrfs_destroy_dev_zone_info(struct btrfs_device *device) { } 119 120 /* 121 * In case the kernel is compiled without CONFIG_BLK_DEV_ZONED we'll never call 122 * into btrfs_clone_dev_zone_info() so it's safe to return NULL here. 123 */ 124 static inline struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info( 125 struct btrfs_device *orig_dev) 126 { 127 return NULL; 128 } 129 130 static inline int btrfs_check_zoned_mode(const struct btrfs_fs_info *fs_info) 131 { 132 if (!btrfs_is_zoned(fs_info)) 133 return 0; 134 135 btrfs_err(fs_info, "zoned block devices support is not enabled"); 136 return -EOPNOTSUPP; 137 } 138 139 static inline int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info, 140 unsigned long *mount_opt) 141 { 142 return 0; 143 } 144 145 static inline int btrfs_sb_log_location_bdev(struct block_device *bdev, 146 int mirror, int rw, u64 *bytenr_ret) 147 { 148 *bytenr_ret = btrfs_sb_offset(mirror); 149 return 0; 150 } 151 152 static inline int btrfs_sb_log_location(struct btrfs_device *device, int mirror, 153 int rw, u64 *bytenr_ret) 154 { 155 *bytenr_ret = btrfs_sb_offset(mirror); 156 return 0; 157 } 158 159 static inline int btrfs_advance_sb_log(struct btrfs_device *device, int mirror) 160 { 161 return 0; 162 } 163 164 static inline int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror) 165 { 166 return 0; 167 } 168 169 static inline u64 btrfs_find_allocatable_zones(struct btrfs_device *device, 170 u64 hole_start, u64 hole_end, 171 u64 num_bytes) 172 { 173 return hole_start; 174 } 175 176 static inline int btrfs_reset_device_zone(struct btrfs_device *device, 177 u64 physical, u64 length, u64 *bytes) 178 { 179 *bytes = 0; 180 return 0; 181 } 182 183 static inline int btrfs_ensure_empty_zones(struct btrfs_device *device, 184 u64 start, u64 size) 185 { 186 return 0; 187 } 188 189 static inline int btrfs_load_block_group_zone_info( 190 struct btrfs_block_group *cache, bool new) 191 { 192 return 0; 193 } 194 195 static inline void btrfs_calc_zone_unusable(struct btrfs_block_group *cache) { } 196 197 static inline bool btrfs_use_zone_append(struct btrfs_bio *bbio) 198 { 199 return false; 200 } 201 202 static inline void btrfs_record_physical_zoned(struct btrfs_bio *bbio) 203 { 204 } 205 206 static inline int btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info, 207 struct btrfs_eb_write_context *ctx) 208 { 209 return 0; 210 } 211 212 static inline int btrfs_zoned_issue_zeroout(struct btrfs_device *device, 213 u64 physical, u64 length) 214 { 215 return -EOPNOTSUPP; 216 } 217 218 static inline int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, 219 u64 logical, u64 physical_start, 220 u64 physical_pos) 221 { 222 return -EOPNOTSUPP; 223 } 224 225 static inline bool btrfs_zone_activate(struct btrfs_block_group *block_group) 226 { 227 return true; 228 } 229 230 static inline int btrfs_zone_finish(struct btrfs_block_group *block_group) 231 { 232 return 0; 233 } 234 235 static inline bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, 236 u64 flags) 237 { 238 return true; 239 } 240 241 static inline void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, 242 u64 logical, u64 length) { } 243 244 static inline void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg, 245 struct extent_buffer *eb) { } 246 247 static inline void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg) { } 248 249 static inline void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info) { } 250 251 static inline bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info) 252 { 253 return false; 254 } 255 256 static inline void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info, 257 u64 logical, u64 length) { } 258 259 static inline int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info) 260 { 261 return 1; 262 } 263 264 static inline int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info, 265 struct btrfs_space_info *space_info, 266 bool do_finish) 267 { 268 /* Consider all the block groups are active */ 269 return 0; 270 } 271 272 static inline void btrfs_check_active_zone_reservation(struct btrfs_fs_info *fs_info) { } 273 274 #endif 275 276 static inline bool btrfs_dev_is_sequential(struct btrfs_device *device, u64 pos) 277 { 278 struct btrfs_zoned_device_info *zone_info = device->zone_info; 279 280 if (!zone_info) 281 return false; 282 283 return test_bit(pos >> zone_info->zone_size_shift, zone_info->seq_zones); 284 } 285 286 static inline bool btrfs_dev_is_empty_zone(struct btrfs_device *device, u64 pos) 287 { 288 struct btrfs_zoned_device_info *zone_info = device->zone_info; 289 290 if (!zone_info) 291 return true; 292 293 return test_bit(pos >> zone_info->zone_size_shift, zone_info->empty_zones); 294 } 295 296 static inline void btrfs_dev_set_empty_zone_bit(struct btrfs_device *device, 297 u64 pos, bool set) 298 { 299 struct btrfs_zoned_device_info *zone_info = device->zone_info; 300 unsigned int zno; 301 302 if (!zone_info) 303 return; 304 305 zno = pos >> zone_info->zone_size_shift; 306 if (set) 307 set_bit(zno, zone_info->empty_zones); 308 else 309 clear_bit(zno, zone_info->empty_zones); 310 } 311 312 static inline void btrfs_dev_set_zone_empty(struct btrfs_device *device, u64 pos) 313 { 314 btrfs_dev_set_empty_zone_bit(device, pos, true); 315 } 316 317 static inline void btrfs_dev_clear_zone_empty(struct btrfs_device *device, u64 pos) 318 { 319 btrfs_dev_set_empty_zone_bit(device, pos, false); 320 } 321 322 static inline bool btrfs_check_device_zone_type(const struct btrfs_fs_info *fs_info, 323 struct block_device *bdev) 324 { 325 if (btrfs_is_zoned(fs_info)) { 326 /* 327 * We can allow a regular device on a zoned filesystem, because 328 * we will emulate the zoned capabilities. 329 */ 330 if (!bdev_is_zoned(bdev)) 331 return true; 332 333 return fs_info->zone_size == 334 (bdev_zone_sectors(bdev) << SECTOR_SHIFT); 335 } 336 337 /* Do not allow Host Managed zoned device. */ 338 return !bdev_is_zoned(bdev); 339 } 340 341 static inline bool btrfs_check_super_location(struct btrfs_device *device, u64 pos) 342 { 343 /* 344 * On a non-zoned device, any address is OK. On a zoned device, 345 * non-SEQUENTIAL WRITE REQUIRED zones are capable. 346 */ 347 return device->zone_info == NULL || !btrfs_dev_is_sequential(device, pos); 348 } 349 350 static inline bool btrfs_can_zone_reset(struct btrfs_device *device, 351 u64 physical, u64 length) 352 { 353 u64 zone_size; 354 355 if (!btrfs_dev_is_sequential(device, physical)) 356 return false; 357 358 zone_size = device->zone_info->zone_size; 359 if (!IS_ALIGNED(physical, zone_size) || !IS_ALIGNED(length, zone_size)) 360 return false; 361 362 return true; 363 } 364 365 static inline void btrfs_zoned_meta_io_lock(struct btrfs_fs_info *fs_info) 366 { 367 if (!btrfs_is_zoned(fs_info)) 368 return; 369 mutex_lock(&fs_info->zoned_meta_io_lock); 370 } 371 372 static inline void btrfs_zoned_meta_io_unlock(struct btrfs_fs_info *fs_info) 373 { 374 if (!btrfs_is_zoned(fs_info)) 375 return; 376 mutex_unlock(&fs_info->zoned_meta_io_lock); 377 } 378 379 static inline void btrfs_clear_treelog_bg(struct btrfs_block_group *bg) 380 { 381 struct btrfs_fs_info *fs_info = bg->fs_info; 382 383 if (!btrfs_is_zoned(fs_info)) 384 return; 385 386 spin_lock(&fs_info->treelog_bg_lock); 387 if (fs_info->treelog_bg == bg->start) 388 fs_info->treelog_bg = 0; 389 spin_unlock(&fs_info->treelog_bg_lock); 390 } 391 392 static inline void btrfs_zoned_data_reloc_lock(struct btrfs_inode *inode) 393 { 394 struct btrfs_root *root = inode->root; 395 396 if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info)) 397 mutex_lock(&root->fs_info->zoned_data_reloc_io_lock); 398 } 399 400 static inline void btrfs_zoned_data_reloc_unlock(struct btrfs_inode *inode) 401 { 402 struct btrfs_root *root = inode->root; 403 404 if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info)) 405 mutex_unlock(&root->fs_info->zoned_data_reloc_io_lock); 406 } 407 408 static inline bool btrfs_zoned_bg_is_full(const struct btrfs_block_group *bg) 409 { 410 ASSERT(btrfs_is_zoned(bg->fs_info)); 411 return (bg->alloc_offset == bg->zone_capacity); 412 } 413 414 #endif 415