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