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Linux kernel mirror (for testing)
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linux
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 u64 max_zone_append_size;
24 u32 nr_zones;
25 unsigned int max_active_zones;
26 atomic_t active_zones_left;
27 unsigned long *seq_zones;
28 unsigned long *empty_zones;
29 unsigned long *active_zones;
30 struct blk_zone *zone_cache;
31 struct blk_zone sb_zones[2 * BTRFS_SUPER_MIRROR_MAX];
32};
33
34#ifdef CONFIG_BLK_DEV_ZONED
35int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos,
36 struct blk_zone *zone);
37int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info);
38int btrfs_get_dev_zone_info(struct btrfs_device *device, bool populate_cache);
39void btrfs_destroy_dev_zone_info(struct btrfs_device *device);
40struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info(struct btrfs_device *orig_dev);
41int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info);
42int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info);
43int btrfs_sb_log_location_bdev(struct block_device *bdev, int mirror, int rw,
44 u64 *bytenr_ret);
45int btrfs_sb_log_location(struct btrfs_device *device, int mirror, int rw,
46 u64 *bytenr_ret);
47int btrfs_advance_sb_log(struct btrfs_device *device, int mirror);
48int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror);
49u64 btrfs_find_allocatable_zones(struct btrfs_device *device, u64 hole_start,
50 u64 hole_end, u64 num_bytes);
51int btrfs_reset_device_zone(struct btrfs_device *device, u64 physical,
52 u64 length, u64 *bytes);
53int btrfs_ensure_empty_zones(struct btrfs_device *device, u64 start, u64 size);
54int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache, bool new);
55void btrfs_calc_zone_unusable(struct btrfs_block_group *cache);
56void btrfs_redirty_list_add(struct btrfs_transaction *trans,
57 struct extent_buffer *eb);
58void btrfs_free_redirty_list(struct btrfs_transaction *trans);
59bool btrfs_use_zone_append(struct btrfs_inode *inode, u64 start);
60void btrfs_record_physical_zoned(struct inode *inode, u64 file_offset,
61 struct bio *bio);
62void btrfs_rewrite_logical_zoned(struct btrfs_ordered_extent *ordered);
63bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info,
64 struct extent_buffer *eb,
65 struct btrfs_block_group **cache_ret);
66void btrfs_revert_meta_write_pointer(struct btrfs_block_group *cache,
67 struct extent_buffer *eb);
68int btrfs_zoned_issue_zeroout(struct btrfs_device *device, u64 physical, u64 length);
69int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, u64 logical,
70 u64 physical_start, u64 physical_pos);
71struct btrfs_device *btrfs_zoned_get_device(struct btrfs_fs_info *fs_info,
72 u64 logical, u64 length);
73bool btrfs_zone_activate(struct btrfs_block_group *block_group);
74int btrfs_zone_finish(struct btrfs_block_group *block_group);
75bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, u64 flags);
76void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical,
77 u64 length);
78void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg,
79 struct extent_buffer *eb);
80void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg);
81void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info);
82bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info);
83void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info, u64 logical,
84 u64 length);
85int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info);
86int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info,
87 struct btrfs_space_info *space_info, bool do_finish);
88#else /* CONFIG_BLK_DEV_ZONED */
89static inline int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos,
90 struct blk_zone *zone)
91{
92 return 0;
93}
94
95static inline int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info)
96{
97 return 0;
98}
99
100static inline int btrfs_get_dev_zone_info(struct btrfs_device *device,
101 bool populate_cache)
102{
103 return 0;
104}
105
106static inline void btrfs_destroy_dev_zone_info(struct btrfs_device *device) { }
107
108/*
109 * In case the kernel is compiled without CONFIG_BLK_DEV_ZONED we'll never call
110 * into btrfs_clone_dev_zone_info() so it's safe to return NULL here.
111 */
112static inline struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info(
113 struct btrfs_device *orig_dev)
114{
115 return NULL;
116}
117
118static inline int btrfs_check_zoned_mode(const struct btrfs_fs_info *fs_info)
119{
120 if (!btrfs_is_zoned(fs_info))
121 return 0;
122
123 btrfs_err(fs_info, "zoned block devices support is not enabled");
124 return -EOPNOTSUPP;
125}
126
127static inline int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info)
128{
129 return 0;
130}
131
132static inline int btrfs_sb_log_location_bdev(struct block_device *bdev,
133 int mirror, int rw, u64 *bytenr_ret)
134{
135 *bytenr_ret = btrfs_sb_offset(mirror);
136 return 0;
137}
138
139static inline int btrfs_sb_log_location(struct btrfs_device *device, int mirror,
140 int rw, u64 *bytenr_ret)
141{
142 *bytenr_ret = btrfs_sb_offset(mirror);
143 return 0;
144}
145
146static inline int btrfs_advance_sb_log(struct btrfs_device *device, int mirror)
147{
148 return 0;
149}
150
151static inline int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror)
152{
153 return 0;
154}
155
156static inline u64 btrfs_find_allocatable_zones(struct btrfs_device *device,
157 u64 hole_start, u64 hole_end,
158 u64 num_bytes)
159{
160 return hole_start;
161}
162
163static inline int btrfs_reset_device_zone(struct btrfs_device *device,
164 u64 physical, u64 length, u64 *bytes)
165{
166 *bytes = 0;
167 return 0;
168}
169
170static inline int btrfs_ensure_empty_zones(struct btrfs_device *device,
171 u64 start, u64 size)
172{
173 return 0;
174}
175
176static inline int btrfs_load_block_group_zone_info(
177 struct btrfs_block_group *cache, bool new)
178{
179 return 0;
180}
181
182static inline void btrfs_calc_zone_unusable(struct btrfs_block_group *cache) { }
183
184static inline void btrfs_redirty_list_add(struct btrfs_transaction *trans,
185 struct extent_buffer *eb) { }
186static inline void btrfs_free_redirty_list(struct btrfs_transaction *trans) { }
187
188static inline bool btrfs_use_zone_append(struct btrfs_inode *inode, u64 start)
189{
190 return false;
191}
192
193static inline void btrfs_record_physical_zoned(struct inode *inode,
194 u64 file_offset, struct bio *bio)
195{
196}
197
198static inline void btrfs_rewrite_logical_zoned(
199 struct btrfs_ordered_extent *ordered) { }
200
201static inline bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info,
202 struct extent_buffer *eb,
203 struct btrfs_block_group **cache_ret)
204{
205 return true;
206}
207
208static inline void btrfs_revert_meta_write_pointer(
209 struct btrfs_block_group *cache,
210 struct extent_buffer *eb)
211{
212}
213
214static inline int btrfs_zoned_issue_zeroout(struct btrfs_device *device,
215 u64 physical, u64 length)
216{
217 return -EOPNOTSUPP;
218}
219
220static inline int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev,
221 u64 logical, u64 physical_start,
222 u64 physical_pos)
223{
224 return -EOPNOTSUPP;
225}
226
227static inline struct btrfs_device *btrfs_zoned_get_device(
228 struct btrfs_fs_info *fs_info,
229 u64 logical, u64 length)
230{
231 return ERR_PTR(-EOPNOTSUPP);
232}
233
234static inline bool btrfs_zone_activate(struct btrfs_block_group *block_group)
235{
236 return true;
237}
238
239static inline int btrfs_zone_finish(struct btrfs_block_group *block_group)
240{
241 return 0;
242}
243
244static inline bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices,
245 u64 flags)
246{
247 return true;
248}
249
250static inline void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info,
251 u64 logical, u64 length) { }
252
253static inline void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg,
254 struct extent_buffer *eb) { }
255
256static inline void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg) { }
257
258static inline void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info) { }
259
260static inline bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info)
261{
262 return false;
263}
264
265static inline void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info,
266 u64 logical, u64 length) { }
267
268static inline int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info)
269{
270 return 1;
271}
272
273static inline int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info,
274 struct btrfs_space_info *space_info,
275 bool do_finish)
276{
277 /* Consider all the block groups are active */
278 return 0;
279}
280
281#endif
282
283static inline bool btrfs_dev_is_sequential(struct btrfs_device *device, u64 pos)
284{
285 struct btrfs_zoned_device_info *zone_info = device->zone_info;
286
287 if (!zone_info)
288 return false;
289
290 return test_bit(pos >> zone_info->zone_size_shift, zone_info->seq_zones);
291}
292
293static inline bool btrfs_dev_is_empty_zone(struct btrfs_device *device, u64 pos)
294{
295 struct btrfs_zoned_device_info *zone_info = device->zone_info;
296
297 if (!zone_info)
298 return true;
299
300 return test_bit(pos >> zone_info->zone_size_shift, zone_info->empty_zones);
301}
302
303static inline void btrfs_dev_set_empty_zone_bit(struct btrfs_device *device,
304 u64 pos, bool set)
305{
306 struct btrfs_zoned_device_info *zone_info = device->zone_info;
307 unsigned int zno;
308
309 if (!zone_info)
310 return;
311
312 zno = pos >> zone_info->zone_size_shift;
313 if (set)
314 set_bit(zno, zone_info->empty_zones);
315 else
316 clear_bit(zno, zone_info->empty_zones);
317}
318
319static inline void btrfs_dev_set_zone_empty(struct btrfs_device *device, u64 pos)
320{
321 btrfs_dev_set_empty_zone_bit(device, pos, true);
322}
323
324static inline void btrfs_dev_clear_zone_empty(struct btrfs_device *device, u64 pos)
325{
326 btrfs_dev_set_empty_zone_bit(device, pos, false);
327}
328
329static inline bool btrfs_check_device_zone_type(const struct btrfs_fs_info *fs_info,
330 struct block_device *bdev)
331{
332 if (btrfs_is_zoned(fs_info)) {
333 /*
334 * We can allow a regular device on a zoned filesystem, because
335 * we will emulate the zoned capabilities.
336 */
337 if (!bdev_is_zoned(bdev))
338 return true;
339
340 return fs_info->zone_size ==
341 (bdev_zone_sectors(bdev) << SECTOR_SHIFT);
342 }
343
344 /* Do not allow Host Manged zoned device */
345 return bdev_zoned_model(bdev) != BLK_ZONED_HM;
346}
347
348static inline bool btrfs_check_super_location(struct btrfs_device *device, u64 pos)
349{
350 /*
351 * On a non-zoned device, any address is OK. On a zoned device,
352 * non-SEQUENTIAL WRITE REQUIRED zones are capable.
353 */
354 return device->zone_info == NULL || !btrfs_dev_is_sequential(device, pos);
355}
356
357static inline bool btrfs_can_zone_reset(struct btrfs_device *device,
358 u64 physical, u64 length)
359{
360 u64 zone_size;
361
362 if (!btrfs_dev_is_sequential(device, physical))
363 return false;
364
365 zone_size = device->zone_info->zone_size;
366 if (!IS_ALIGNED(physical, zone_size) || !IS_ALIGNED(length, zone_size))
367 return false;
368
369 return true;
370}
371
372static inline void btrfs_zoned_meta_io_lock(struct btrfs_fs_info *fs_info)
373{
374 if (!btrfs_is_zoned(fs_info))
375 return;
376 mutex_lock(&fs_info->zoned_meta_io_lock);
377}
378
379static inline void btrfs_zoned_meta_io_unlock(struct btrfs_fs_info *fs_info)
380{
381 if (!btrfs_is_zoned(fs_info))
382 return;
383 mutex_unlock(&fs_info->zoned_meta_io_lock);
384}
385
386static inline void btrfs_clear_treelog_bg(struct btrfs_block_group *bg)
387{
388 struct btrfs_fs_info *fs_info = bg->fs_info;
389
390 if (!btrfs_is_zoned(fs_info))
391 return;
392
393 spin_lock(&fs_info->treelog_bg_lock);
394 if (fs_info->treelog_bg == bg->start)
395 fs_info->treelog_bg = 0;
396 spin_unlock(&fs_info->treelog_bg_lock);
397}
398
399static inline void btrfs_zoned_data_reloc_lock(struct btrfs_inode *inode)
400{
401 struct btrfs_root *root = inode->root;
402
403 if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info))
404 mutex_lock(&root->fs_info->zoned_data_reloc_io_lock);
405}
406
407static inline void btrfs_zoned_data_reloc_unlock(struct btrfs_inode *inode)
408{
409 struct btrfs_root *root = inode->root;
410
411 if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info))
412 mutex_unlock(&root->fs_info->zoned_data_reloc_io_lock);
413}
414
415static inline bool btrfs_zoned_bg_is_full(const struct btrfs_block_group *bg)
416{
417 ASSERT(btrfs_is_zoned(bg->fs_info));
418 return (bg->alloc_offset == bg->zone_capacity);
419}
420
421#endif