1 /* SPDX-License-Identifier: GPL-2.0 */
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>
16 #include "block-group.h"
17 #include "btrfs_inode.h"
23 struct btrfs_ordered_extent;
25 struct btrfs_space_info;
26 struct btrfs_eb_write_context;
27 struct btrfs_fs_devices;
29 #define BTRFS_DEFAULT_RECLAIM_THRESH (75)
31 struct btrfs_zoned_device_info {
33 * Number of zones, zone size and types of zones if bdev is a
39 unsigned int max_active_zones;
41 * Reserved active zones for one metadata and one system block group.
42 * It can vary per-device depending on the allocation status.
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];
53 void btrfs_finish_ordered_zoned(struct btrfs_ordered_extent *ordered);
55 #ifdef CONFIG_BLK_DEV_ZONED
56 int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos,
57 struct blk_zone *zone);
58 int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info);
59 int btrfs_get_dev_zone_info(struct btrfs_device *device, bool populate_cache);
60 void btrfs_destroy_dev_zone_info(struct btrfs_device *device);
61 struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info(struct btrfs_device *orig_dev);
62 int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info);
63 int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info, unsigned long *mount_opt);
64 int btrfs_sb_log_location_bdev(struct block_device *bdev, int mirror, int rw,
66 int btrfs_sb_log_location(struct btrfs_device *device, int mirror, int rw,
68 int btrfs_advance_sb_log(struct btrfs_device *device, int mirror);
69 int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror);
70 u64 btrfs_find_allocatable_zones(struct btrfs_device *device, u64 hole_start,
71 u64 hole_end, u64 num_bytes);
72 int btrfs_reset_device_zone(struct btrfs_device *device, u64 physical,
73 u64 length, u64 *bytes);
74 int btrfs_ensure_empty_zones(struct btrfs_device *device, u64 start, u64 size);
75 int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache, bool new);
76 void btrfs_calc_zone_unusable(struct btrfs_block_group *cache);
77 bool btrfs_use_zone_append(struct btrfs_bio *bbio);
78 void btrfs_record_physical_zoned(struct btrfs_bio *bbio);
79 int btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info,
80 struct btrfs_eb_write_context *ctx);
81 int btrfs_zoned_issue_zeroout(struct btrfs_device *device, u64 physical, u64 length);
82 int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, u64 logical,
83 u64 physical_start, u64 physical_pos);
84 bool btrfs_zone_activate(struct btrfs_block_group *block_group);
85 int btrfs_zone_finish(struct btrfs_block_group *block_group);
86 bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, u64 flags);
87 void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical,
89 void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg,
90 struct extent_buffer *eb);
91 void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg);
92 void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info);
93 bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info);
94 void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info, u64 logical,
96 int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info);
97 int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info,
98 struct btrfs_space_info *space_info, bool do_finish);
99 void btrfs_check_active_zone_reservation(struct btrfs_fs_info *fs_info);
100 #else /* CONFIG_BLK_DEV_ZONED */
101 static inline int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos,
102 struct blk_zone *zone)
107 static inline int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info)
112 static inline int btrfs_get_dev_zone_info(struct btrfs_device *device,
118 static inline void btrfs_destroy_dev_zone_info(struct btrfs_device *device) { }
121 * In case the kernel is compiled without CONFIG_BLK_DEV_ZONED we'll never call
122 * into btrfs_clone_dev_zone_info() so it's safe to return NULL here.
124 static inline struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info(
125 struct btrfs_device *orig_dev)
130 static inline int btrfs_check_zoned_mode(const struct btrfs_fs_info *fs_info)
132 if (!btrfs_is_zoned(fs_info))
135 btrfs_err(fs_info, "zoned block devices support is not enabled");
139 static inline int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info,
140 unsigned long *mount_opt)
145 static inline int btrfs_sb_log_location_bdev(struct block_device *bdev,
146 int mirror, int rw, u64 *bytenr_ret)
148 *bytenr_ret = btrfs_sb_offset(mirror);
152 static inline int btrfs_sb_log_location(struct btrfs_device *device, int mirror,
153 int rw, u64 *bytenr_ret)
155 *bytenr_ret = btrfs_sb_offset(mirror);
159 static inline int btrfs_advance_sb_log(struct btrfs_device *device, int mirror)
164 static inline int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror)
169 static inline u64 btrfs_find_allocatable_zones(struct btrfs_device *device,
170 u64 hole_start, u64 hole_end,
176 static inline int btrfs_reset_device_zone(struct btrfs_device *device,
177 u64 physical, u64 length, u64 *bytes)
183 static inline int btrfs_ensure_empty_zones(struct btrfs_device *device,
189 static inline int btrfs_load_block_group_zone_info(
190 struct btrfs_block_group *cache, bool new)
195 static inline void btrfs_calc_zone_unusable(struct btrfs_block_group *cache) { }
197 static inline bool btrfs_use_zone_append(struct btrfs_bio *bbio)
202 static inline void btrfs_record_physical_zoned(struct btrfs_bio *bbio)
206 static inline int btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info,
207 struct btrfs_eb_write_context *ctx)
212 static inline int btrfs_zoned_issue_zeroout(struct btrfs_device *device,
213 u64 physical, u64 length)
218 static inline int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev,
219 u64 logical, u64 physical_start,
225 static inline bool btrfs_zone_activate(struct btrfs_block_group *block_group)
230 static inline int btrfs_zone_finish(struct btrfs_block_group *block_group)
235 static inline bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices,
241 static inline void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info,
242 u64 logical, u64 length) { }
244 static inline void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg,
245 struct extent_buffer *eb) { }
247 static inline void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg) { }
249 static inline void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info) { }
251 static inline bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info)
256 static inline void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info,
257 u64 logical, u64 length) { }
259 static inline int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info)
264 static inline int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info,
265 struct btrfs_space_info *space_info,
268 /* Consider all the block groups are active */
272 static inline void btrfs_check_active_zone_reservation(struct btrfs_fs_info *fs_info) { }
276 static inline bool btrfs_dev_is_sequential(struct btrfs_device *device, u64 pos)
278 struct btrfs_zoned_device_info *zone_info = device->zone_info;
283 return test_bit(pos >> zone_info->zone_size_shift, zone_info->seq_zones);
286 static inline bool btrfs_dev_is_empty_zone(struct btrfs_device *device, u64 pos)
288 struct btrfs_zoned_device_info *zone_info = device->zone_info;
293 return test_bit(pos >> zone_info->zone_size_shift, zone_info->empty_zones);
296 static inline void btrfs_dev_set_empty_zone_bit(struct btrfs_device *device,
299 struct btrfs_zoned_device_info *zone_info = device->zone_info;
305 zno = pos >> zone_info->zone_size_shift;
307 set_bit(zno, zone_info->empty_zones);
309 clear_bit(zno, zone_info->empty_zones);
312 static inline void btrfs_dev_set_zone_empty(struct btrfs_device *device, u64 pos)
314 btrfs_dev_set_empty_zone_bit(device, pos, true);
317 static inline void btrfs_dev_clear_zone_empty(struct btrfs_device *device, u64 pos)
319 btrfs_dev_set_empty_zone_bit(device, pos, false);
322 static inline bool btrfs_check_device_zone_type(const struct btrfs_fs_info *fs_info,
323 struct block_device *bdev)
325 if (btrfs_is_zoned(fs_info)) {
327 * We can allow a regular device on a zoned filesystem, because
328 * we will emulate the zoned capabilities.
330 if (!bdev_is_zoned(bdev))
333 return fs_info->zone_size ==
334 (bdev_zone_sectors(bdev) << SECTOR_SHIFT);
337 /* Do not allow Host Managed zoned device. */
338 return !bdev_is_zoned(bdev);
341 static inline bool btrfs_check_super_location(struct btrfs_device *device, u64 pos)
344 * On a non-zoned device, any address is OK. On a zoned device,
345 * non-SEQUENTIAL WRITE REQUIRED zones are capable.
347 return device->zone_info == NULL || !btrfs_dev_is_sequential(device, pos);
350 static inline bool btrfs_can_zone_reset(struct btrfs_device *device,
351 u64 physical, u64 length)
355 if (!btrfs_dev_is_sequential(device, physical))
358 zone_size = device->zone_info->zone_size;
359 if (!IS_ALIGNED(physical, zone_size) || !IS_ALIGNED(length, zone_size))
365 static inline void btrfs_zoned_meta_io_lock(struct btrfs_fs_info *fs_info)
367 if (!btrfs_is_zoned(fs_info))
369 mutex_lock(&fs_info->zoned_meta_io_lock);
372 static inline void btrfs_zoned_meta_io_unlock(struct btrfs_fs_info *fs_info)
374 if (!btrfs_is_zoned(fs_info))
376 mutex_unlock(&fs_info->zoned_meta_io_lock);
379 static inline void btrfs_clear_treelog_bg(struct btrfs_block_group *bg)
381 struct btrfs_fs_info *fs_info = bg->fs_info;
383 if (!btrfs_is_zoned(fs_info))
386 spin_lock(&fs_info->treelog_bg_lock);
387 if (fs_info->treelog_bg == bg->start)
388 fs_info->treelog_bg = 0;
389 spin_unlock(&fs_info->treelog_bg_lock);
392 static inline void btrfs_zoned_data_reloc_lock(struct btrfs_inode *inode)
394 struct btrfs_root *root = inode->root;
396 if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info))
397 mutex_lock(&root->fs_info->zoned_data_reloc_io_lock);
400 static inline void btrfs_zoned_data_reloc_unlock(struct btrfs_inode *inode)
402 struct btrfs_root *root = inode->root;
404 if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info))
405 mutex_unlock(&root->fs_info->zoned_data_reloc_io_lock);
408 static inline bool btrfs_zoned_bg_is_full(const struct btrfs_block_group *bg)
410 ASSERT(btrfs_is_zoned(bg->fs_info));
411 return (bg->alloc_offset == bg->zone_capacity);