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