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