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 u64 max_zone_append_size; 26 u32 nr_zones; 27 unsigned long *seq_zones; 28 unsigned long *empty_zones; 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); 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 void 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 #else /* CONFIG_BLK_DEV_ZONED */ 71 static inline int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, 72 struct blk_zone *zone) 73 { 74 return 0; 75 } 76 77 static inline int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info) 78 { 79 return 0; 80 } 81 82 static inline int btrfs_get_dev_zone_info(struct btrfs_device *device) 83 { 84 return 0; 85 } 86 87 static inline void btrfs_destroy_dev_zone_info(struct btrfs_device *device) { } 88 89 static inline int btrfs_check_zoned_mode(const struct btrfs_fs_info *fs_info) 90 { 91 if (!btrfs_is_zoned(fs_info)) 92 return 0; 93 94 btrfs_err(fs_info, "zoned block devices support is not enabled"); 95 return -EOPNOTSUPP; 96 } 97 98 static inline int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info) 99 { 100 return 0; 101 } 102 103 static inline int btrfs_sb_log_location_bdev(struct block_device *bdev, 104 int mirror, int rw, u64 *bytenr_ret) 105 { 106 *bytenr_ret = btrfs_sb_offset(mirror); 107 return 0; 108 } 109 110 static inline int btrfs_sb_log_location(struct btrfs_device *device, int mirror, 111 int rw, u64 *bytenr_ret) 112 { 113 *bytenr_ret = btrfs_sb_offset(mirror); 114 return 0; 115 } 116 117 static inline void btrfs_advance_sb_log(struct btrfs_device *device, int mirror) 118 { } 119 120 static inline int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror) 121 { 122 return 0; 123 } 124 125 static inline u64 btrfs_find_allocatable_zones(struct btrfs_device *device, 126 u64 hole_start, u64 hole_end, 127 u64 num_bytes) 128 { 129 return hole_start; 130 } 131 132 static inline int btrfs_reset_device_zone(struct btrfs_device *device, 133 u64 physical, u64 length, u64 *bytes) 134 { 135 *bytes = 0; 136 return 0; 137 } 138 139 static inline int btrfs_ensure_empty_zones(struct btrfs_device *device, 140 u64 start, u64 size) 141 { 142 return 0; 143 } 144 145 static inline int btrfs_load_block_group_zone_info( 146 struct btrfs_block_group *cache, bool new) 147 { 148 return 0; 149 } 150 151 static inline void btrfs_calc_zone_unusable(struct btrfs_block_group *cache) { } 152 153 static inline void btrfs_redirty_list_add(struct btrfs_transaction *trans, 154 struct extent_buffer *eb) { } 155 static inline void btrfs_free_redirty_list(struct btrfs_transaction *trans) { } 156 157 static inline bool btrfs_use_zone_append(struct btrfs_inode *inode, u64 start) 158 { 159 return false; 160 } 161 162 static inline void btrfs_record_physical_zoned(struct inode *inode, 163 u64 file_offset, struct bio *bio) 164 { 165 } 166 167 static inline void btrfs_rewrite_logical_zoned( 168 struct btrfs_ordered_extent *ordered) { } 169 170 static inline bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info, 171 struct extent_buffer *eb, 172 struct btrfs_block_group **cache_ret) 173 { 174 return true; 175 } 176 177 static inline void btrfs_revert_meta_write_pointer( 178 struct btrfs_block_group *cache, 179 struct extent_buffer *eb) 180 { 181 } 182 183 static inline int btrfs_zoned_issue_zeroout(struct btrfs_device *device, 184 u64 physical, u64 length) 185 { 186 return -EOPNOTSUPP; 187 } 188 189 static inline int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, 190 u64 logical, u64 physical_start, 191 u64 physical_pos) 192 { 193 return -EOPNOTSUPP; 194 } 195 196 static inline struct btrfs_device *btrfs_zoned_get_device( 197 struct btrfs_fs_info *fs_info, 198 u64 logical, u64 length) 199 { 200 return ERR_PTR(-EOPNOTSUPP); 201 } 202 203 #endif 204 205 static inline bool btrfs_dev_is_sequential(struct btrfs_device *device, u64 pos) 206 { 207 struct btrfs_zoned_device_info *zone_info = device->zone_info; 208 209 if (!zone_info) 210 return false; 211 212 return test_bit(pos >> zone_info->zone_size_shift, zone_info->seq_zones); 213 } 214 215 static inline bool btrfs_dev_is_empty_zone(struct btrfs_device *device, u64 pos) 216 { 217 struct btrfs_zoned_device_info *zone_info = device->zone_info; 218 219 if (!zone_info) 220 return true; 221 222 return test_bit(pos >> zone_info->zone_size_shift, zone_info->empty_zones); 223 } 224 225 static inline void btrfs_dev_set_empty_zone_bit(struct btrfs_device *device, 226 u64 pos, bool set) 227 { 228 struct btrfs_zoned_device_info *zone_info = device->zone_info; 229 unsigned int zno; 230 231 if (!zone_info) 232 return; 233 234 zno = pos >> zone_info->zone_size_shift; 235 if (set) 236 set_bit(zno, zone_info->empty_zones); 237 else 238 clear_bit(zno, zone_info->empty_zones); 239 } 240 241 static inline void btrfs_dev_set_zone_empty(struct btrfs_device *device, u64 pos) 242 { 243 btrfs_dev_set_empty_zone_bit(device, pos, true); 244 } 245 246 static inline void btrfs_dev_clear_zone_empty(struct btrfs_device *device, u64 pos) 247 { 248 btrfs_dev_set_empty_zone_bit(device, pos, false); 249 } 250 251 static inline bool btrfs_check_device_zone_type(const struct btrfs_fs_info *fs_info, 252 struct block_device *bdev) 253 { 254 if (btrfs_is_zoned(fs_info)) { 255 /* 256 * We can allow a regular device on a zoned filesystem, because 257 * we will emulate the zoned capabilities. 258 */ 259 if (!bdev_is_zoned(bdev)) 260 return true; 261 262 return fs_info->zone_size == 263 (bdev_zone_sectors(bdev) << SECTOR_SHIFT); 264 } 265 266 /* Do not allow Host Manged zoned device */ 267 return bdev_zoned_model(bdev) != BLK_ZONED_HM; 268 } 269 270 static inline bool btrfs_check_super_location(struct btrfs_device *device, u64 pos) 271 { 272 /* 273 * On a non-zoned device, any address is OK. On a zoned device, 274 * non-SEQUENTIAL WRITE REQUIRED zones are capable. 275 */ 276 return device->zone_info == NULL || !btrfs_dev_is_sequential(device, pos); 277 } 278 279 static inline bool btrfs_can_zone_reset(struct btrfs_device *device, 280 u64 physical, u64 length) 281 { 282 u64 zone_size; 283 284 if (!btrfs_dev_is_sequential(device, physical)) 285 return false; 286 287 zone_size = device->zone_info->zone_size; 288 if (!IS_ALIGNED(physical, zone_size) || !IS_ALIGNED(length, zone_size)) 289 return false; 290 291 return true; 292 } 293 294 static inline void btrfs_zoned_meta_io_lock(struct btrfs_fs_info *fs_info) 295 { 296 if (!btrfs_is_zoned(fs_info)) 297 return; 298 mutex_lock(&fs_info->zoned_meta_io_lock); 299 } 300 301 static inline void btrfs_zoned_meta_io_unlock(struct btrfs_fs_info *fs_info) 302 { 303 if (!btrfs_is_zoned(fs_info)) 304 return; 305 mutex_unlock(&fs_info->zoned_meta_io_lock); 306 } 307 308 static inline void btrfs_clear_treelog_bg(struct btrfs_block_group *bg) 309 { 310 struct btrfs_fs_info *fs_info = bg->fs_info; 311 312 if (!btrfs_is_zoned(fs_info)) 313 return; 314 315 spin_lock(&fs_info->treelog_bg_lock); 316 if (fs_info->treelog_bg == bg->start) 317 fs_info->treelog_bg = 0; 318 spin_unlock(&fs_info->treelog_bg_lock); 319 } 320 321 #endif 322