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 "volumes.h" 9 #include "disk-io.h" 10 #include "block-group.h" 11 #include "btrfs_inode.h" 12 13 #define BTRFS_DEFAULT_RECLAIM_THRESH (75) 14 15 struct btrfs_zoned_device_info { 16 /* 17 * Number of zones, zone size and types of zones if bdev is a 18 * zoned block device. 19 */ 20 u64 zone_size; 21 u8 zone_size_shift; 22 u32 nr_zones; 23 unsigned int max_active_zones; 24 atomic_t active_zones_left; 25 unsigned long *seq_zones; 26 unsigned long *empty_zones; 27 unsigned long *active_zones; 28 struct blk_zone *zone_cache; 29 struct blk_zone sb_zones[2 * BTRFS_SUPER_MIRROR_MAX]; 30 }; 31 32 #ifdef CONFIG_BLK_DEV_ZONED 33 int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, 34 struct blk_zone *zone); 35 int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info); 36 int btrfs_get_dev_zone_info(struct btrfs_device *device, bool populate_cache); 37 void btrfs_destroy_dev_zone_info(struct btrfs_device *device); 38 int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info); 39 int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info); 40 int btrfs_sb_log_location_bdev(struct block_device *bdev, int mirror, int rw, 41 u64 *bytenr_ret); 42 int btrfs_sb_log_location(struct btrfs_device *device, int mirror, int rw, 43 u64 *bytenr_ret); 44 int btrfs_advance_sb_log(struct btrfs_device *device, int mirror); 45 int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror); 46 u64 btrfs_find_allocatable_zones(struct btrfs_device *device, u64 hole_start, 47 u64 hole_end, u64 num_bytes); 48 int btrfs_reset_device_zone(struct btrfs_device *device, u64 physical, 49 u64 length, u64 *bytes); 50 int btrfs_ensure_empty_zones(struct btrfs_device *device, u64 start, u64 size); 51 int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache, bool new); 52 void btrfs_calc_zone_unusable(struct btrfs_block_group *cache); 53 void btrfs_redirty_list_add(struct btrfs_transaction *trans, 54 struct extent_buffer *eb); 55 void btrfs_free_redirty_list(struct btrfs_transaction *trans); 56 bool btrfs_use_zone_append(struct btrfs_inode *inode, u64 start); 57 void btrfs_record_physical_zoned(struct inode *inode, u64 file_offset, 58 struct bio *bio); 59 void btrfs_rewrite_logical_zoned(struct btrfs_ordered_extent *ordered); 60 bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info, 61 struct extent_buffer *eb, 62 struct btrfs_block_group **cache_ret); 63 void btrfs_revert_meta_write_pointer(struct btrfs_block_group *cache, 64 struct extent_buffer *eb); 65 int btrfs_zoned_issue_zeroout(struct btrfs_device *device, u64 physical, u64 length); 66 int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, u64 logical, 67 u64 physical_start, u64 physical_pos); 68 struct btrfs_device *btrfs_zoned_get_device(struct btrfs_fs_info *fs_info, 69 u64 logical, u64 length); 70 bool btrfs_zone_activate(struct btrfs_block_group *block_group); 71 int btrfs_zone_finish(struct btrfs_block_group *block_group); 72 bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, u64 flags); 73 void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical, 74 u64 length); 75 void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg, 76 struct extent_buffer *eb); 77 void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg); 78 void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info); 79 bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info); 80 #else /* CONFIG_BLK_DEV_ZONED */ 81 static inline int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, 82 struct blk_zone *zone) 83 { 84 return 0; 85 } 86 87 static inline int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info) 88 { 89 return 0; 90 } 91 92 static inline int btrfs_get_dev_zone_info(struct btrfs_device *device, 93 bool populate_cache) 94 { 95 return 0; 96 } 97 98 static inline void btrfs_destroy_dev_zone_info(struct btrfs_device *device) { } 99 100 static inline int btrfs_check_zoned_mode(const struct btrfs_fs_info *fs_info) 101 { 102 if (!btrfs_is_zoned(fs_info)) 103 return 0; 104 105 btrfs_err(fs_info, "zoned block devices support is not enabled"); 106 return -EOPNOTSUPP; 107 } 108 109 static inline int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info) 110 { 111 return 0; 112 } 113 114 static inline int btrfs_sb_log_location_bdev(struct block_device *bdev, 115 int mirror, int rw, u64 *bytenr_ret) 116 { 117 *bytenr_ret = btrfs_sb_offset(mirror); 118 return 0; 119 } 120 121 static inline int btrfs_sb_log_location(struct btrfs_device *device, int mirror, 122 int rw, u64 *bytenr_ret) 123 { 124 *bytenr_ret = btrfs_sb_offset(mirror); 125 return 0; 126 } 127 128 static inline int btrfs_advance_sb_log(struct btrfs_device *device, int mirror) 129 { 130 return 0; 131 } 132 133 static inline int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror) 134 { 135 return 0; 136 } 137 138 static inline u64 btrfs_find_allocatable_zones(struct btrfs_device *device, 139 u64 hole_start, u64 hole_end, 140 u64 num_bytes) 141 { 142 return hole_start; 143 } 144 145 static inline int btrfs_reset_device_zone(struct btrfs_device *device, 146 u64 physical, u64 length, u64 *bytes) 147 { 148 *bytes = 0; 149 return 0; 150 } 151 152 static inline int btrfs_ensure_empty_zones(struct btrfs_device *device, 153 u64 start, u64 size) 154 { 155 return 0; 156 } 157 158 static inline int btrfs_load_block_group_zone_info( 159 struct btrfs_block_group *cache, bool new) 160 { 161 return 0; 162 } 163 164 static inline void btrfs_calc_zone_unusable(struct btrfs_block_group *cache) { } 165 166 static inline void btrfs_redirty_list_add(struct btrfs_transaction *trans, 167 struct extent_buffer *eb) { } 168 static inline void btrfs_free_redirty_list(struct btrfs_transaction *trans) { } 169 170 static inline bool btrfs_use_zone_append(struct btrfs_inode *inode, u64 start) 171 { 172 return false; 173 } 174 175 static inline void btrfs_record_physical_zoned(struct inode *inode, 176 u64 file_offset, struct bio *bio) 177 { 178 } 179 180 static inline void btrfs_rewrite_logical_zoned( 181 struct btrfs_ordered_extent *ordered) { } 182 183 static inline bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info, 184 struct extent_buffer *eb, 185 struct btrfs_block_group **cache_ret) 186 { 187 return true; 188 } 189 190 static inline void btrfs_revert_meta_write_pointer( 191 struct btrfs_block_group *cache, 192 struct extent_buffer *eb) 193 { 194 } 195 196 static inline int btrfs_zoned_issue_zeroout(struct btrfs_device *device, 197 u64 physical, u64 length) 198 { 199 return -EOPNOTSUPP; 200 } 201 202 static inline int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, 203 u64 logical, u64 physical_start, 204 u64 physical_pos) 205 { 206 return -EOPNOTSUPP; 207 } 208 209 static inline struct btrfs_device *btrfs_zoned_get_device( 210 struct btrfs_fs_info *fs_info, 211 u64 logical, u64 length) 212 { 213 return ERR_PTR(-EOPNOTSUPP); 214 } 215 216 static inline bool btrfs_zone_activate(struct btrfs_block_group *block_group) 217 { 218 return true; 219 } 220 221 static inline int btrfs_zone_finish(struct btrfs_block_group *block_group) 222 { 223 return 0; 224 } 225 226 static inline bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, 227 u64 flags) 228 { 229 return true; 230 } 231 232 static inline void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, 233 u64 logical, u64 length) { } 234 235 static inline void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg, 236 struct extent_buffer *eb) { } 237 238 static inline void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg) { } 239 240 static inline void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info) { } 241 242 static inline bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info) 243 { 244 return false; 245 } 246 #endif 247 248 static inline bool btrfs_dev_is_sequential(struct btrfs_device *device, u64 pos) 249 { 250 struct btrfs_zoned_device_info *zone_info = device->zone_info; 251 252 if (!zone_info) 253 return false; 254 255 return test_bit(pos >> zone_info->zone_size_shift, zone_info->seq_zones); 256 } 257 258 static inline bool btrfs_dev_is_empty_zone(struct btrfs_device *device, u64 pos) 259 { 260 struct btrfs_zoned_device_info *zone_info = device->zone_info; 261 262 if (!zone_info) 263 return true; 264 265 return test_bit(pos >> zone_info->zone_size_shift, zone_info->empty_zones); 266 } 267 268 static inline void btrfs_dev_set_empty_zone_bit(struct btrfs_device *device, 269 u64 pos, bool set) 270 { 271 struct btrfs_zoned_device_info *zone_info = device->zone_info; 272 unsigned int zno; 273 274 if (!zone_info) 275 return; 276 277 zno = pos >> zone_info->zone_size_shift; 278 if (set) 279 set_bit(zno, zone_info->empty_zones); 280 else 281 clear_bit(zno, zone_info->empty_zones); 282 } 283 284 static inline void btrfs_dev_set_zone_empty(struct btrfs_device *device, u64 pos) 285 { 286 btrfs_dev_set_empty_zone_bit(device, pos, true); 287 } 288 289 static inline void btrfs_dev_clear_zone_empty(struct btrfs_device *device, u64 pos) 290 { 291 btrfs_dev_set_empty_zone_bit(device, pos, false); 292 } 293 294 static inline bool btrfs_check_device_zone_type(const struct btrfs_fs_info *fs_info, 295 struct block_device *bdev) 296 { 297 if (btrfs_is_zoned(fs_info)) { 298 /* 299 * We can allow a regular device on a zoned filesystem, because 300 * we will emulate the zoned capabilities. 301 */ 302 if (!bdev_is_zoned(bdev)) 303 return true; 304 305 return fs_info->zone_size == 306 (bdev_zone_sectors(bdev) << SECTOR_SHIFT); 307 } 308 309 /* Do not allow Host Manged zoned device */ 310 return bdev_zoned_model(bdev) != BLK_ZONED_HM; 311 } 312 313 static inline bool btrfs_check_super_location(struct btrfs_device *device, u64 pos) 314 { 315 /* 316 * On a non-zoned device, any address is OK. On a zoned device, 317 * non-SEQUENTIAL WRITE REQUIRED zones are capable. 318 */ 319 return device->zone_info == NULL || !btrfs_dev_is_sequential(device, pos); 320 } 321 322 static inline bool btrfs_can_zone_reset(struct btrfs_device *device, 323 u64 physical, u64 length) 324 { 325 u64 zone_size; 326 327 if (!btrfs_dev_is_sequential(device, physical)) 328 return false; 329 330 zone_size = device->zone_info->zone_size; 331 if (!IS_ALIGNED(physical, zone_size) || !IS_ALIGNED(length, zone_size)) 332 return false; 333 334 return true; 335 } 336 337 static inline void btrfs_zoned_meta_io_lock(struct btrfs_fs_info *fs_info) 338 { 339 if (!btrfs_is_zoned(fs_info)) 340 return; 341 mutex_lock(&fs_info->zoned_meta_io_lock); 342 } 343 344 static inline void btrfs_zoned_meta_io_unlock(struct btrfs_fs_info *fs_info) 345 { 346 if (!btrfs_is_zoned(fs_info)) 347 return; 348 mutex_unlock(&fs_info->zoned_meta_io_lock); 349 } 350 351 static inline void btrfs_clear_treelog_bg(struct btrfs_block_group *bg) 352 { 353 struct btrfs_fs_info *fs_info = bg->fs_info; 354 355 if (!btrfs_is_zoned(fs_info)) 356 return; 357 358 spin_lock(&fs_info->treelog_bg_lock); 359 if (fs_info->treelog_bg == bg->start) 360 fs_info->treelog_bg = 0; 361 spin_unlock(&fs_info->treelog_bg_lock); 362 } 363 364 static inline void btrfs_zoned_data_reloc_lock(struct btrfs_inode *inode) 365 { 366 struct btrfs_root *root = inode->root; 367 368 if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info)) 369 mutex_lock(&root->fs_info->zoned_data_reloc_io_lock); 370 } 371 372 static inline void btrfs_zoned_data_reloc_unlock(struct btrfs_inode *inode) 373 { 374 struct btrfs_root *root = inode->root; 375 376 if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info)) 377 mutex_unlock(&root->fs_info->zoned_data_reloc_io_lock); 378 } 379 380 static inline bool btrfs_zoned_bg_is_full(const struct btrfs_block_group *bg) 381 { 382 ASSERT(btrfs_is_zoned(bg->fs_info)); 383 return (bg->alloc_offset == bg->zone_capacity); 384 } 385 386 #endif 387