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