Line data Source code
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 :
16 : struct 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 : atomic_t active_zones_left;
26 : unsigned long *seq_zones;
27 : unsigned long *empty_zones;
28 : unsigned long *active_zones;
29 : struct blk_zone *zone_cache;
30 : struct blk_zone sb_zones[2 * BTRFS_SUPER_MIRROR_MAX];
31 : };
32 :
33 : void btrfs_finish_ordered_zoned(struct btrfs_ordered_extent *ordered);
34 :
35 : #ifdef CONFIG_BLK_DEV_ZONED
36 : int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos,
37 : struct blk_zone *zone);
38 : int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info);
39 : int btrfs_get_dev_zone_info(struct btrfs_device *device, bool populate_cache);
40 : void btrfs_destroy_dev_zone_info(struct btrfs_device *device);
41 : struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info(struct btrfs_device *orig_dev);
42 : int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info);
43 : int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info);
44 : int btrfs_sb_log_location_bdev(struct block_device *bdev, int mirror, int rw,
45 : u64 *bytenr_ret);
46 : int btrfs_sb_log_location(struct btrfs_device *device, int mirror, int rw,
47 : u64 *bytenr_ret);
48 : int btrfs_advance_sb_log(struct btrfs_device *device, int mirror);
49 : int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror);
50 : u64 btrfs_find_allocatable_zones(struct btrfs_device *device, u64 hole_start,
51 : u64 hole_end, u64 num_bytes);
52 : int btrfs_reset_device_zone(struct btrfs_device *device, u64 physical,
53 : u64 length, u64 *bytes);
54 : int btrfs_ensure_empty_zones(struct btrfs_device *device, u64 start, u64 size);
55 : int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache, bool new);
56 : void btrfs_calc_zone_unusable(struct btrfs_block_group *cache);
57 : void btrfs_redirty_list_add(struct btrfs_transaction *trans,
58 : struct extent_buffer *eb);
59 : bool btrfs_use_zone_append(struct btrfs_bio *bbio);
60 : void btrfs_record_physical_zoned(struct btrfs_bio *bbio);
61 : bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info,
62 : struct extent_buffer *eb,
63 : struct btrfs_block_group **cache_ret);
64 : void btrfs_revert_meta_write_pointer(struct btrfs_block_group *cache,
65 : struct extent_buffer *eb);
66 : int btrfs_zoned_issue_zeroout(struct btrfs_device *device, u64 physical, u64 length);
67 : int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, u64 logical,
68 : u64 physical_start, u64 physical_pos);
69 : bool btrfs_zone_activate(struct btrfs_block_group *block_group);
70 : int btrfs_zone_finish(struct btrfs_block_group *block_group);
71 : bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, u64 flags);
72 : void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical,
73 : u64 length);
74 : void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg,
75 : struct extent_buffer *eb);
76 : void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg);
77 : void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info);
78 : bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info);
79 : void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info, u64 logical,
80 : u64 length);
81 : int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info);
82 : int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info,
83 : struct btrfs_space_info *space_info, bool do_finish);
84 : #else /* CONFIG_BLK_DEV_ZONED */
85 : static inline int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos,
86 : struct blk_zone *zone)
87 : {
88 : return 0;
89 : }
90 :
91 : static inline int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info)
92 : {
93 : return 0;
94 : }
95 :
96 : static inline int btrfs_get_dev_zone_info(struct btrfs_device *device,
97 : bool populate_cache)
98 : {
99 : return 0;
100 : }
101 :
102 : static inline void btrfs_destroy_dev_zone_info(struct btrfs_device *device) { }
103 :
104 : /*
105 : * In case the kernel is compiled without CONFIG_BLK_DEV_ZONED we'll never call
106 : * into btrfs_clone_dev_zone_info() so it's safe to return NULL here.
107 : */
108 : static inline struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info(
109 : struct btrfs_device *orig_dev)
110 : {
111 : return NULL;
112 : }
113 :
114 : static inline int btrfs_check_zoned_mode(const struct btrfs_fs_info *fs_info)
115 : {
116 : if (!btrfs_is_zoned(fs_info))
117 : return 0;
118 :
119 : btrfs_err(fs_info, "zoned block devices support is not enabled");
120 : return -EOPNOTSUPP;
121 : }
122 :
123 : static inline int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info)
124 : {
125 : return 0;
126 : }
127 :
128 : static inline int btrfs_sb_log_location_bdev(struct block_device *bdev,
129 : int mirror, int rw, u64 *bytenr_ret)
130 : {
131 : *bytenr_ret = btrfs_sb_offset(mirror);
132 : return 0;
133 : }
134 :
135 : static inline int btrfs_sb_log_location(struct btrfs_device *device, int mirror,
136 : int rw, u64 *bytenr_ret)
137 : {
138 853302 : *bytenr_ret = btrfs_sb_offset(mirror);
139 853302 : return 0;
140 : }
141 :
142 : static inline int btrfs_advance_sb_log(struct btrfs_device *device, int mirror)
143 : {
144 : return 0;
145 : }
146 :
147 : static inline int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror)
148 : {
149 : return 0;
150 : }
151 :
152 : static inline u64 btrfs_find_allocatable_zones(struct btrfs_device *device,
153 : u64 hole_start, u64 hole_end,
154 : u64 num_bytes)
155 : {
156 : return hole_start;
157 : }
158 :
159 : static inline int btrfs_reset_device_zone(struct btrfs_device *device,
160 : u64 physical, u64 length, u64 *bytes)
161 : {
162 : *bytes = 0;
163 : return 0;
164 : }
165 :
166 : static inline int btrfs_ensure_empty_zones(struct btrfs_device *device,
167 : u64 start, u64 size)
168 : {
169 : return 0;
170 : }
171 :
172 : static inline int btrfs_load_block_group_zone_info(
173 : struct btrfs_block_group *cache, bool new)
174 : {
175 : return 0;
176 : }
177 :
178 : static inline void btrfs_calc_zone_unusable(struct btrfs_block_group *cache) { }
179 :
180 : static inline void btrfs_redirty_list_add(struct btrfs_transaction *trans,
181 : struct extent_buffer *eb) { }
182 :
183 : static inline bool btrfs_use_zone_append(struct btrfs_bio *bbio)
184 : {
185 : return false;
186 : }
187 :
188 : static inline void btrfs_record_physical_zoned(struct btrfs_bio *bbio)
189 : {
190 : }
191 :
192 : static inline bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info,
193 : struct extent_buffer *eb,
194 : struct btrfs_block_group **cache_ret)
195 : {
196 : return true;
197 : }
198 :
199 : static inline void btrfs_revert_meta_write_pointer(
200 : struct btrfs_block_group *cache,
201 : struct extent_buffer *eb)
202 : {
203 : }
204 :
205 : static inline int btrfs_zoned_issue_zeroout(struct btrfs_device *device,
206 : u64 physical, u64 length)
207 : {
208 : return -EOPNOTSUPP;
209 : }
210 :
211 : static inline int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev,
212 : u64 logical, u64 physical_start,
213 : u64 physical_pos)
214 : {
215 : return -EOPNOTSUPP;
216 : }
217 :
218 : static inline bool btrfs_zone_activate(struct btrfs_block_group *block_group)
219 : {
220 : return true;
221 : }
222 :
223 : static inline int btrfs_zone_finish(struct btrfs_block_group *block_group)
224 : {
225 : return 0;
226 : }
227 :
228 : static inline bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices,
229 : u64 flags)
230 : {
231 : return true;
232 : }
233 :
234 : static inline void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info,
235 : u64 logical, u64 length) { }
236 :
237 : static inline void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg,
238 : struct extent_buffer *eb) { }
239 :
240 : static inline void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg) { }
241 :
242 : static inline void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info) { }
243 :
244 : static inline bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info)
245 : {
246 : return false;
247 : }
248 :
249 : static inline void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info,
250 285572 : u64 logical, u64 length) { }
251 :
252 : static inline int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info)
253 : {
254 : return 1;
255 : }
256 :
257 : static inline int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info,
258 : struct btrfs_space_info *space_info,
259 : bool do_finish)
260 : {
261 : /* Consider all the block groups are active */
262 : return 0;
263 : }
264 :
265 : #endif
266 :
267 36316 : static inline bool btrfs_dev_is_sequential(struct btrfs_device *device, u64 pos)
268 : {
269 36316 : struct btrfs_zoned_device_info *zone_info = device->zone_info;
270 :
271 36316 : if (!zone_info)
272 : return false;
273 :
274 0 : return test_bit(pos >> zone_info->zone_size_shift, zone_info->seq_zones);
275 : }
276 :
277 : static inline bool btrfs_dev_is_empty_zone(struct btrfs_device *device, u64 pos)
278 : {
279 : struct btrfs_zoned_device_info *zone_info = device->zone_info;
280 :
281 : if (!zone_info)
282 : return true;
283 :
284 : return test_bit(pos >> zone_info->zone_size_shift, zone_info->empty_zones);
285 : }
286 :
287 : static inline void btrfs_dev_set_empty_zone_bit(struct btrfs_device *device,
288 : u64 pos, bool set)
289 : {
290 : struct btrfs_zoned_device_info *zone_info = device->zone_info;
291 : unsigned int zno;
292 :
293 : if (!zone_info)
294 : return;
295 :
296 : zno = pos >> zone_info->zone_size_shift;
297 : if (set)
298 : set_bit(zno, zone_info->empty_zones);
299 : else
300 : clear_bit(zno, zone_info->empty_zones);
301 : }
302 :
303 : static inline void btrfs_dev_set_zone_empty(struct btrfs_device *device, u64 pos)
304 : {
305 : btrfs_dev_set_empty_zone_bit(device, pos, true);
306 : }
307 :
308 : static inline void btrfs_dev_clear_zone_empty(struct btrfs_device *device, u64 pos)
309 : {
310 : btrfs_dev_set_empty_zone_bit(device, pos, false);
311 : }
312 :
313 : static inline bool btrfs_check_device_zone_type(const struct btrfs_fs_info *fs_info,
314 : struct block_device *bdev)
315 : {
316 : if (btrfs_is_zoned(fs_info)) {
317 : /*
318 : * We can allow a regular device on a zoned filesystem, because
319 : * we will emulate the zoned capabilities.
320 : */
321 : if (!bdev_is_zoned(bdev))
322 : return true;
323 :
324 : return fs_info->zone_size ==
325 : (bdev_zone_sectors(bdev) << SECTOR_SHIFT);
326 : }
327 :
328 : /* Do not allow Host Manged zoned device */
329 : return bdev_zoned_model(bdev) != BLK_ZONED_HM;
330 : }
331 :
332 6 : static inline bool btrfs_check_super_location(struct btrfs_device *device, u64 pos)
333 : {
334 : /*
335 : * On a non-zoned device, any address is OK. On a zoned device,
336 : * non-SEQUENTIAL WRITE REQUIRED zones are capable.
337 : */
338 6 : return device->zone_info == NULL || !btrfs_dev_is_sequential(device, pos);
339 : }
340 :
341 36316 : static inline bool btrfs_can_zone_reset(struct btrfs_device *device,
342 : u64 physical, u64 length)
343 : {
344 36316 : u64 zone_size;
345 :
346 36316 : if (!btrfs_dev_is_sequential(device, physical))
347 : return false;
348 :
349 0 : zone_size = device->zone_info->zone_size;
350 0 : if (!IS_ALIGNED(physical, zone_size) || !IS_ALIGNED(length, zone_size))
351 0 : return false;
352 :
353 : return true;
354 : }
355 :
356 : static inline void btrfs_zoned_meta_io_lock(struct btrfs_fs_info *fs_info)
357 : {
358 : if (!btrfs_is_zoned(fs_info))
359 : return;
360 : mutex_lock(&fs_info->zoned_meta_io_lock);
361 : }
362 :
363 : static inline void btrfs_zoned_meta_io_unlock(struct btrfs_fs_info *fs_info)
364 : {
365 : if (!btrfs_is_zoned(fs_info))
366 : return;
367 : mutex_unlock(&fs_info->zoned_meta_io_lock);
368 : }
369 :
370 : static inline void btrfs_clear_treelog_bg(struct btrfs_block_group *bg)
371 : {
372 : struct btrfs_fs_info *fs_info = bg->fs_info;
373 :
374 : if (!btrfs_is_zoned(fs_info))
375 : return;
376 :
377 : spin_lock(&fs_info->treelog_bg_lock);
378 : if (fs_info->treelog_bg == bg->start)
379 : fs_info->treelog_bg = 0;
380 : spin_unlock(&fs_info->treelog_bg_lock);
381 : }
382 :
383 : static inline void btrfs_zoned_data_reloc_lock(struct btrfs_inode *inode)
384 : {
385 : struct btrfs_root *root = inode->root;
386 :
387 : if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info))
388 : mutex_lock(&root->fs_info->zoned_data_reloc_io_lock);
389 : }
390 :
391 : static inline void btrfs_zoned_data_reloc_unlock(struct btrfs_inode *inode)
392 : {
393 : struct btrfs_root *root = inode->root;
394 :
395 : if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info))
396 : mutex_unlock(&root->fs_info->zoned_data_reloc_io_lock);
397 : }
398 :
399 : static inline bool btrfs_zoned_bg_is_full(const struct btrfs_block_group *bg)
400 : {
401 0 : ASSERT(btrfs_is_zoned(bg->fs_info));
402 0 : return (bg->alloc_offset == bg->zone_capacity);
403 : }
404 :
405 : #endif
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