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