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