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