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