fs/btrfs/zoned.h

   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/atomic.h>
   8 #include <linux/blkdev.h>
   9 #include <linux/blkzoned.h>
  10 #include <linux/errno.h>
  11 #include <linux/spinlock.h>
  12 #include <linux/mutex.h>
  13 #include "messages.h"
  14 #include "volumes.h"
  15 #include "disk-io.h"
  16 #include "block-group.h"
  17 #include "btrfs_inode.h"
  18 #include "fs.h"
  19
  20 struct block_device;
  21 struct extent_buffer;
  22 struct btrfs_bio;
  23 struct btrfs_ordered_extent;
  24 struct btrfs_fs_info;
  25 struct btrfs_space_info;
  26 struct btrfs_eb_write_context;
  27 struct btrfs_fs_devices;
  28
  29 #define BTRFS_DEFAULT_RECLAIM_THRESH                            (75)
  30
  31 struct btrfs_zoned_device_info {
  32         /*
  33          * Number of zones, zone size and types of zones if bdev is a
  34          * zoned block device.
  35          */
  36         u64 zone_size;
  37         u8  zone_size_shift;
  38         u32 nr_zones;
  39         unsigned int max_active_zones;
  40         /*
  41          * Reserved active zones for one metadata and one system block group.
  42          * It can vary per-device depending on the allocation status.
  43          */
  44         int reserved_active_zones;
  45         atomic_t active_zones_left;
  46         unsigned long *seq_zones;
  47         unsigned long *empty_zones;
  48         unsigned long *active_zones;
  49         struct blk_zone *zone_cache;
  50         struct blk_zone sb_zones[2 * BTRFS_SUPER_MIRROR_MAX];
  51 };
  52
  53 void btrfs_finish_ordered_zoned(struct btrfs_ordered_extent *ordered);
  54
  55 #ifdef CONFIG_BLK_DEV_ZONED
  56 int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info);
  57 int btrfs_get_dev_zone_info(struct btrfs_device *device, bool populate_cache);
  58 void btrfs_destroy_dev_zone_info(struct btrfs_device *device);
  59 struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info(struct btrfs_device *orig_dev);
  60 int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info);
  61 int btrfs_check_mountopts_zoned(const struct btrfs_fs_info *info,
  62                                 unsigned long long *mount_opt);
  63 int btrfs_sb_log_location_bdev(struct block_device *bdev, int mirror, int rw,
  64                                u64 *bytenr_ret);
  65 int btrfs_sb_log_location(struct btrfs_device *device, int mirror, int rw,
  66                           u64 *bytenr_ret);
  67 int btrfs_advance_sb_log(struct btrfs_device *device, int mirror);
  68 int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror);
  69 u64 btrfs_find_allocatable_zones(struct btrfs_device *device, u64 hole_start,
  70                                  u64 hole_end, u64 num_bytes);
  71 int btrfs_reset_device_zone(struct btrfs_device *device, u64 physical,
  72                             u64 length, u64 *bytes);
  73 int btrfs_ensure_empty_zones(struct btrfs_device *device, u64 start, u64 size);
  74 int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache, bool new);
  75 void btrfs_calc_zone_unusable(struct btrfs_block_group *cache);
  76 bool btrfs_use_zone_append(struct btrfs_bio *bbio);
  77 void btrfs_record_physical_zoned(struct btrfs_bio *bbio);
  78 int btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info,
  79                                    struct btrfs_eb_write_context *ctx);
  80 int btrfs_zoned_issue_zeroout(struct btrfs_device *device, u64 physical, u64 length);
  81 int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, u64 logical,
  82                                   u64 physical_start, u64 physical_pos);
  83 bool btrfs_zone_activate(struct btrfs_block_group *block_group);
  84 int btrfs_zone_finish(struct btrfs_block_group *block_group);
  85 bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, u64 flags);
  86 void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical,
  87                              u64 length);
  88 void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg,
  89                                    struct extent_buffer *eb);
  90 void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg);
  91 void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info);
  92 bool btrfs_zoned_should_reclaim(const struct btrfs_fs_info *fs_info);
  93 void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info, u64 logical,
  94                                        u64 length);
  95 int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info);
  96 int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info,
  97                                 struct btrfs_space_info *space_info, bool do_finish);
  98 void btrfs_check_active_zone_reservation(struct btrfs_fs_info *fs_info);
  99 #else /* CONFIG_BLK_DEV_ZONED */
 100
 101 static inline int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info)
 102 {
 103         return 0;
 104 }
 105
 106 static inline int btrfs_get_dev_zone_info(struct btrfs_device *device,
 107                                           bool populate_cache)
 108 {
 109         return 0;
 110 }
 111
 112 static inline void btrfs_destroy_dev_zone_info(struct btrfs_device *device) { }
 113
 114 /*
 115  * In case the kernel is compiled without CONFIG_BLK_DEV_ZONED we'll never call
 116  * into btrfs_clone_dev_zone_info() so it's safe to return NULL here.
 117  */
 118 static inline struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info(
 119                                                  struct btrfs_device *orig_dev)
 120 {
 121         return NULL;
 122 }
 123
 124 static inline int btrfs_check_zoned_mode(const struct btrfs_fs_info *fs_info)
 125 {
 126         if (!btrfs_is_zoned(fs_info))
 127                 return 0;
 128
 129         btrfs_err(fs_info, "zoned block devices support is not enabled");
 130         return -EOPNOTSUPP;
 131 }
 132
 133 static inline int btrfs_check_mountopts_zoned(const struct btrfs_fs_info *info,
 134                                               unsigned long long *mount_opt)
 135 {
 136         return 0;
 137 }
 138
 139 static inline int btrfs_sb_log_location_bdev(struct block_device *bdev,
 140                                              int mirror, int rw, u64 *bytenr_ret)
 141 {
 142         *bytenr_ret = btrfs_sb_offset(mirror);
 143         return 0;
 144 }
 145
 146 static inline int btrfs_sb_log_location(struct btrfs_device *device, int mirror,
 147                                         int rw, u64 *bytenr_ret)
 148 {
 149         *bytenr_ret = btrfs_sb_offset(mirror);
 150         return 0;
 151 }
 152
 153 static inline int btrfs_advance_sb_log(struct btrfs_device *device, int mirror)
 154 {
 155         return 0;
 156 }
 157
 158 static inline int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror)
 159 {
 160         return 0;
 161 }
 162
 163 static inline u64 btrfs_find_allocatable_zones(struct btrfs_device *device,
 164                                                u64 hole_start, u64 hole_end,
 165                                                u64 num_bytes)
 166 {
 167         return hole_start;
 168 }
 169
 170 static inline int btrfs_reset_device_zone(struct btrfs_device *device,
 171                                           u64 physical, u64 length, u64 *bytes)
 172 {
 173         *bytes = 0;
 174         return 0;
 175 }
 176
 177 static inline int btrfs_ensure_empty_zones(struct btrfs_device *device,
 178                                            u64 start, u64 size)
 179 {
 180         return 0;
 181 }
 182
 183 static inline int btrfs_load_block_group_zone_info(
 184                 struct btrfs_block_group *cache, bool new)
 185 {
 186         return 0;
 187 }
 188
 189 static inline void btrfs_calc_zone_unusable(struct btrfs_block_group *cache) { }
 190
 191 static inline bool btrfs_use_zone_append(struct btrfs_bio *bbio)
 192 {
 193         return false;
 194 }
 195
 196 static inline void btrfs_record_physical_zoned(struct btrfs_bio *bbio)
 197 {
 198 }
 199
 200 static inline int btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info,
 201                                                  struct btrfs_eb_write_context *ctx)
 202 {
 203         return 0;
 204 }
 205
 206 static inline int btrfs_zoned_issue_zeroout(struct btrfs_device *device,
 207                                             u64 physical, u64 length)
 208 {
 209         return -EOPNOTSUPP;
 210 }
 211
 212 static inline int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev,
 213                                                 u64 logical, u64 physical_start,
 214                                                 u64 physical_pos)
 215 {
 216         return -EOPNOTSUPP;
 217 }
 218
 219 static inline bool btrfs_zone_activate(struct btrfs_block_group *block_group)
 220 {
 221         return true;
 222 }
 223
 224 static inline int btrfs_zone_finish(struct btrfs_block_group *block_group)
 225 {
 226         return 0;
 227 }
 228
 229 static inline bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices,
 230                                            u64 flags)
 231 {
 232         return true;
 233 }
 234
 235 static inline void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info,
 236                                            u64 logical, u64 length) { }
 237
 238 static inline void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg,
 239                                                  struct extent_buffer *eb) { }
 240
 241 static inline void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg) { }
 242
 243 static inline void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info) { }
 244
 245 static inline bool btrfs_zoned_should_reclaim(const struct btrfs_fs_info *fs_info)
 246 {
 247         return false;
 248 }
 249
 250 static inline void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info,
 251                                                      u64 logical, u64 length) { }
 252
 253 static inline int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info)
 254 {
 255         return 1;
 256 }
 257
 258 static inline int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info,
 259                                               struct btrfs_space_info *space_info,
 260                                               bool do_finish)
 261 {
 262         /* Consider all the block groups are active */
 263         return 0;
 264 }
 265
 266 static inline void btrfs_check_active_zone_reservation(struct btrfs_fs_info *fs_info) { }
 267
 268 #endif
 269
 270 static inline bool btrfs_dev_is_sequential(struct btrfs_device *device, u64 pos)
 271 {
 272         struct btrfs_zoned_device_info *zone_info = device->zone_info;
 273
 274         if (!zone_info)
 275                 return false;
 276
 277         return test_bit(pos >> zone_info->zone_size_shift, zone_info->seq_zones);
 278 }
 279
 280 static inline bool btrfs_dev_is_empty_zone(struct btrfs_device *device, u64 pos)
 281 {
 282         struct btrfs_zoned_device_info *zone_info = device->zone_info;
 283
 284         if (!zone_info)
 285                 return true;
 286
 287         return test_bit(pos >> zone_info->zone_size_shift, zone_info->empty_zones);
 288 }
 289
 290 static inline void btrfs_dev_set_empty_zone_bit(struct btrfs_device *device,
 291                                                 u64 pos, bool set)
 292 {
 293         struct btrfs_zoned_device_info *zone_info = device->zone_info;
 294         unsigned int zno;
 295
 296         if (!zone_info)
 297                 return;
 298
 299         zno = pos >> zone_info->zone_size_shift;
 300         if (set)
 301                 set_bit(zno, zone_info->empty_zones);
 302         else
 303                 clear_bit(zno, zone_info->empty_zones);
 304 }
 305
 306 static inline void btrfs_dev_set_zone_empty(struct btrfs_device *device, u64 pos)
 307 {
 308         btrfs_dev_set_empty_zone_bit(device, pos, true);
 309 }
 310
 311 static inline void btrfs_dev_clear_zone_empty(struct btrfs_device *device, u64 pos)
 312 {
 313         btrfs_dev_set_empty_zone_bit(device, pos, false);
 314 }
 315
 316 static inline bool btrfs_check_device_zone_type(const struct btrfs_fs_info *fs_info,
 317                                                 struct block_device *bdev)
 318 {
 319         if (btrfs_is_zoned(fs_info)) {
 320                 /*
 321                  * We can allow a regular device on a zoned filesystem, because
 322                  * we will emulate the zoned capabilities.
 323                  */
 324                 if (!bdev_is_zoned(bdev))
 325                         return true;
 326
 327                 return fs_info->zone_size ==
 328                         (bdev_zone_sectors(bdev) << SECTOR_SHIFT);
 329         }
 330
 331         /* Do not allow Host Managed zoned device. */
 332         return !bdev_is_zoned(bdev);
 333 }
 334
 335 static inline bool btrfs_check_super_location(struct btrfs_device *device, u64 pos)
 336 {
 337         /*
 338          * On a non-zoned device, any address is OK. On a zoned device,
 339          * non-SEQUENTIAL WRITE REQUIRED zones are capable.
 340          */
 341         return device->zone_info == NULL || !btrfs_dev_is_sequential(device, pos);
 342 }
 343
 344 static inline bool btrfs_can_zone_reset(struct btrfs_device *device,
 345                                         u64 physical, u64 length)
 346 {
 347         u64 zone_size;
 348
 349         if (!btrfs_dev_is_sequential(device, physical))
 350                 return false;
 351
 352         zone_size = device->zone_info->zone_size;
 353         if (!IS_ALIGNED(physical, zone_size) || !IS_ALIGNED(length, zone_size))
 354                 return false;
 355
 356         return true;
 357 }
 358
 359 static inline void btrfs_zoned_meta_io_lock(struct btrfs_fs_info *fs_info)
 360 {
 361         if (!btrfs_is_zoned(fs_info))
 362                 return;
 363         mutex_lock(&fs_info->zoned_meta_io_lock);
 364 }
 365
 366 static inline void btrfs_zoned_meta_io_unlock(struct btrfs_fs_info *fs_info)
 367 {
 368         if (!btrfs_is_zoned(fs_info))
 369                 return;
 370         mutex_unlock(&fs_info->zoned_meta_io_lock);
 371 }
 372
 373 static inline void btrfs_clear_treelog_bg(struct btrfs_block_group *bg)
 374 {
 375         struct btrfs_fs_info *fs_info = bg->fs_info;
 376
 377         if (!btrfs_is_zoned(fs_info))
 378                 return;
 379
 380         spin_lock(&fs_info->treelog_bg_lock);
 381         if (fs_info->treelog_bg == bg->start)
 382                 fs_info->treelog_bg = 0;
 383         spin_unlock(&fs_info->treelog_bg_lock);
 384 }
 385
 386 static inline void btrfs_zoned_data_reloc_lock(struct btrfs_inode *inode)
 387 {
 388         struct btrfs_root *root = inode->root;
 389
 390         if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info))
 391                 mutex_lock(&root->fs_info->zoned_data_reloc_io_lock);
 392 }
 393
 394 static inline void btrfs_zoned_data_reloc_unlock(struct btrfs_inode *inode)
 395 {
 396         struct btrfs_root *root = inode->root;
 397
 398         if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info))
 399                 mutex_unlock(&root->fs_info->zoned_data_reloc_io_lock);
 400 }
 401
 402 static inline bool btrfs_zoned_bg_is_full(const struct btrfs_block_group *bg)
 403 {
 404         ASSERT(btrfs_is_zoned(bg->fs_info));
 405         return (bg->alloc_offset == bg->zone_capacity);
 406 }
 407
 408 #endif