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 16struct 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 38void btrfs_finish_ordered_zoned(struct btrfs_ordered_extent *ordered); 39 40#ifdef CONFIG_BLK_DEV_ZONED 41int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, 42 struct blk_zone *zone); 43int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info); 44int btrfs_get_dev_zone_info(struct btrfs_device *device, bool populate_cache); 45void btrfs_destroy_dev_zone_info(struct btrfs_device *device); 46struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info(struct btrfs_device *orig_dev); 47int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info); 48int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info); 49int btrfs_sb_log_location_bdev(struct block_device *bdev, int mirror, int rw, 50 u64 *bytenr_ret); 51int btrfs_sb_log_location(struct btrfs_device *device, int mirror, int rw, 52 u64 *bytenr_ret); 53int btrfs_advance_sb_log(struct btrfs_device *device, int mirror); 54int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror); 55u64 btrfs_find_allocatable_zones(struct btrfs_device *device, u64 hole_start, 56 u64 hole_end, u64 num_bytes); 57int btrfs_reset_device_zone(struct btrfs_device *device, u64 physical, 58 u64 length, u64 *bytes); 59int btrfs_ensure_empty_zones(struct btrfs_device *device, u64 start, u64 size); 60int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache, bool new); 61void btrfs_calc_zone_unusable(struct btrfs_block_group *cache); 62void btrfs_redirty_list_add(struct btrfs_transaction *trans, 63 struct extent_buffer *eb); 64bool btrfs_use_zone_append(struct btrfs_bio *bbio); 65void btrfs_record_physical_zoned(struct btrfs_bio *bbio); 66int btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info, 67 struct btrfs_eb_write_context *ctx); 68int btrfs_zoned_issue_zeroout(struct btrfs_device *device, u64 physical, u64 length); 69int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, u64 logical, 70 u64 physical_start, u64 physical_pos); 71bool btrfs_zone_activate(struct btrfs_block_group *block_group); 72int btrfs_zone_finish(struct btrfs_block_group *block_group); 73bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, u64 flags); 74void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical, 75 u64 length); 76void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg, 77 struct extent_buffer *eb); 78void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg); 79void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info); 80bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info); 81void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info, u64 logical, 82 u64 length); 83int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info); 84int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info, 85 struct btrfs_space_info *space_info, bool do_finish); 86void btrfs_check_active_zone_reservation(struct btrfs_fs_info *fs_info); 87#else /* CONFIG_BLK_DEV_ZONED */ 88static inline int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, 89 struct blk_zone *zone) 90{ 91 return 0; 92} 93 94static inline int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info) 95{ 96 return 0; 97} 98 99static inline int btrfs_get_dev_zone_info(struct btrfs_device *device, 100 bool populate_cache) 101{ 102 return 0; 103} 104 105static inline void btrfs_destroy_dev_zone_info(struct btrfs_device *device) { } 106 107/* 108 * In case the kernel is compiled without CONFIG_BLK_DEV_ZONED we'll never call 109 * into btrfs_clone_dev_zone_info() so it's safe to return NULL here. 110 */ 111static inline struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info( 112 struct btrfs_device *orig_dev) 113{ 114 return NULL; 115} 116 117static inline int btrfs_check_zoned_mode(const struct btrfs_fs_info *fs_info) 118{ 119 if (!btrfs_is_zoned(fs_info)) 120 return 0; 121 122 btrfs_err(fs_info, "zoned block devices support is not enabled"); 123 return -EOPNOTSUPP; 124} 125 126static inline int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info) 127{ 128 return 0; 129} 130 131static inline int btrfs_sb_log_location_bdev(struct block_device *bdev, 132 int mirror, int rw, u64 *bytenr_ret) 133{ 134 *bytenr_ret = btrfs_sb_offset(mirror); 135 return 0; 136} 137 138static inline int btrfs_sb_log_location(struct btrfs_device *device, int mirror, 139 int rw, u64 *bytenr_ret) 140{ 141 *bytenr_ret = btrfs_sb_offset(mirror); 142 return 0; 143} 144 145static inline int btrfs_advance_sb_log(struct btrfs_device *device, int mirror) 146{ 147 return 0; 148} 149 150static inline int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror) 151{ 152 return 0; 153} 154 155static inline u64 btrfs_find_allocatable_zones(struct btrfs_device *device, 156 u64 hole_start, u64 hole_end, 157 u64 num_bytes) 158{ 159 return hole_start; 160} 161 162static inline int btrfs_reset_device_zone(struct btrfs_device *device, 163 u64 physical, u64 length, u64 *bytes) 164{ 165 *bytes = 0; 166 return 0; 167} 168 169static inline int btrfs_ensure_empty_zones(struct btrfs_device *device, 170 u64 start, u64 size) 171{ 172 return 0; 173} 174 175static inline int btrfs_load_block_group_zone_info( 176 struct btrfs_block_group *cache, bool new) 177{ 178 return 0; 179} 180 181static inline void btrfs_calc_zone_unusable(struct btrfs_block_group *cache) { } 182 183static inline void btrfs_redirty_list_add(struct btrfs_transaction *trans, 184 struct extent_buffer *eb) { } 185 186static inline bool btrfs_use_zone_append(struct btrfs_bio *bbio) 187{ 188 return false; 189} 190 191static inline void btrfs_record_physical_zoned(struct btrfs_bio *bbio) 192{ 193} 194 195static inline int btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info, 196 struct btrfs_eb_write_context *ctx) 197{ 198 return 0; 199} 200 201static inline int btrfs_zoned_issue_zeroout(struct btrfs_device *device, 202 u64 physical, u64 length) 203{ 204 return -EOPNOTSUPP; 205} 206 207static inline int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, 208 u64 logical, u64 physical_start, 209 u64 physical_pos) 210{ 211 return -EOPNOTSUPP; 212} 213 214static inline bool btrfs_zone_activate(struct btrfs_block_group *block_group) 215{ 216 return true; 217} 218 219static inline int btrfs_zone_finish(struct btrfs_block_group *block_group) 220{ 221 return 0; 222} 223 224static inline bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, 225 u64 flags) 226{ 227 return true; 228} 229 230static inline void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, 231 u64 logical, u64 length) { } 232 233static inline void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg, 234 struct extent_buffer *eb) { } 235 236static inline void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg) { } 237 238static inline void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info) { } 239 240static inline bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info) 241{ 242 return false; 243} 244 245static inline void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info, 246 u64 logical, u64 length) { } 247 248static inline int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info) 249{ 250 return 1; 251} 252 253static inline int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info, 254 struct btrfs_space_info *space_info, 255 bool do_finish) 256{ 257 /* Consider all the block groups are active */ 258 return 0; 259} 260 261static inline void btrfs_check_active_zone_reservation(struct btrfs_fs_info *fs_info) { } 262 263#endif 264 265static inline bool btrfs_dev_is_sequential(struct btrfs_device *device, u64 pos) 266{ 267 struct btrfs_zoned_device_info *zone_info = device->zone_info; 268 269 if (!zone_info) 270 return false; 271 272 return test_bit(pos >> zone_info->zone_size_shift, zone_info->seq_zones); 273} 274 275static inline bool btrfs_dev_is_empty_zone(struct btrfs_device *device, u64 pos) 276{ 277 struct btrfs_zoned_device_info *zone_info = device->zone_info; 278 279 if (!zone_info) 280 return true; 281 282 return test_bit(pos >> zone_info->zone_size_shift, zone_info->empty_zones); 283} 284 285static inline void btrfs_dev_set_empty_zone_bit(struct btrfs_device *device, 286 u64 pos, bool set) 287{ 288 struct btrfs_zoned_device_info *zone_info = device->zone_info; 289 unsigned int zno; 290 291 if (!zone_info) 292 return; 293 294 zno = pos >> zone_info->zone_size_shift; 295 if (set) 296 set_bit(zno, zone_info->empty_zones); 297 else 298 clear_bit(zno, zone_info->empty_zones); 299} 300 301static inline void btrfs_dev_set_zone_empty(struct btrfs_device *device, u64 pos) 302{ 303 btrfs_dev_set_empty_zone_bit(device, pos, true); 304} 305 306static inline void btrfs_dev_clear_zone_empty(struct btrfs_device *device, u64 pos) 307{ 308 btrfs_dev_set_empty_zone_bit(device, pos, false); 309} 310 311static inline bool btrfs_check_device_zone_type(const struct btrfs_fs_info *fs_info, 312 struct block_device *bdev) 313{ 314 if (btrfs_is_zoned(fs_info)) { 315 /* 316 * We can allow a regular device on a zoned filesystem, because 317 * we will emulate the zoned capabilities. 318 */ 319 if (!bdev_is_zoned(bdev)) 320 return true; 321 322 return fs_info->zone_size == 323 (bdev_zone_sectors(bdev) << SECTOR_SHIFT); 324 } 325 326 /* Do not allow Host Manged zoned device */ 327 return bdev_zoned_model(bdev) != BLK_ZONED_HM; 328} 329 330static inline bool btrfs_check_super_location(struct btrfs_device *device, u64 pos) 331{ 332 /* 333 * On a non-zoned device, any address is OK. On a zoned device, 334 * non-SEQUENTIAL WRITE REQUIRED zones are capable. 335 */ 336 return device->zone_info == NULL || !btrfs_dev_is_sequential(device, pos); 337} 338 339static inline bool btrfs_can_zone_reset(struct btrfs_device *device, 340 u64 physical, u64 length) 341{ 342 u64 zone_size; 343 344 if (!btrfs_dev_is_sequential(device, physical)) 345 return false; 346 347 zone_size = device->zone_info->zone_size; 348 if (!IS_ALIGNED(physical, zone_size) || !IS_ALIGNED(length, zone_size)) 349 return false; 350 351 return true; 352} 353 354static inline void btrfs_zoned_meta_io_lock(struct btrfs_fs_info *fs_info) 355{ 356 if (!btrfs_is_zoned(fs_info)) 357 return; 358 mutex_lock(&fs_info->zoned_meta_io_lock); 359} 360 361static inline void btrfs_zoned_meta_io_unlock(struct btrfs_fs_info *fs_info) 362{ 363 if (!btrfs_is_zoned(fs_info)) 364 return; 365 mutex_unlock(&fs_info->zoned_meta_io_lock); 366} 367 368static inline void btrfs_clear_treelog_bg(struct btrfs_block_group *bg) 369{ 370 struct btrfs_fs_info *fs_info = bg->fs_info; 371 372 if (!btrfs_is_zoned(fs_info)) 373 return; 374 375 spin_lock(&fs_info->treelog_bg_lock); 376 if (fs_info->treelog_bg == bg->start) 377 fs_info->treelog_bg = 0; 378 spin_unlock(&fs_info->treelog_bg_lock); 379} 380 381static inline void btrfs_zoned_data_reloc_lock(struct btrfs_inode *inode) 382{ 383 struct btrfs_root *root = inode->root; 384 385 if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info)) 386 mutex_lock(&root->fs_info->zoned_data_reloc_io_lock); 387} 388 389static inline void btrfs_zoned_data_reloc_unlock(struct btrfs_inode *inode) 390{ 391 struct btrfs_root *root = inode->root; 392 393 if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info)) 394 mutex_unlock(&root->fs_info->zoned_data_reloc_io_lock); 395} 396 397static inline bool btrfs_zoned_bg_is_full(const struct btrfs_block_group *bg) 398{ 399 ASSERT(btrfs_is_zoned(bg->fs_info)); 400 return (bg->alloc_offset == bg->zone_capacity); 401} 402 403#endif 404