Loading...
Note: File does not exist in v3.1.
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 u64 max_zone_append_size;
26 u32 nr_zones;
27 unsigned long *seq_zones;
28 unsigned long *empty_zones;
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);
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);
44void 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);
70#else /* CONFIG_BLK_DEV_ZONED */
71static inline int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos,
72 struct blk_zone *zone)
73{
74 return 0;
75}
76
77static inline int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info)
78{
79 return 0;
80}
81
82static inline int btrfs_get_dev_zone_info(struct btrfs_device *device)
83{
84 return 0;
85}
86
87static inline void btrfs_destroy_dev_zone_info(struct btrfs_device *device) { }
88
89static inline int btrfs_check_zoned_mode(const struct btrfs_fs_info *fs_info)
90{
91 if (!btrfs_is_zoned(fs_info))
92 return 0;
93
94 btrfs_err(fs_info, "zoned block devices support is not enabled");
95 return -EOPNOTSUPP;
96}
97
98static inline int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info)
99{
100 return 0;
101}
102
103static inline int btrfs_sb_log_location_bdev(struct block_device *bdev,
104 int mirror, int rw, u64 *bytenr_ret)
105{
106 *bytenr_ret = btrfs_sb_offset(mirror);
107 return 0;
108}
109
110static inline int btrfs_sb_log_location(struct btrfs_device *device, int mirror,
111 int rw, u64 *bytenr_ret)
112{
113 *bytenr_ret = btrfs_sb_offset(mirror);
114 return 0;
115}
116
117static inline void btrfs_advance_sb_log(struct btrfs_device *device, int mirror)
118{ }
119
120static inline int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror)
121{
122 return 0;
123}
124
125static inline u64 btrfs_find_allocatable_zones(struct btrfs_device *device,
126 u64 hole_start, u64 hole_end,
127 u64 num_bytes)
128{
129 return hole_start;
130}
131
132static inline int btrfs_reset_device_zone(struct btrfs_device *device,
133 u64 physical, u64 length, u64 *bytes)
134{
135 *bytes = 0;
136 return 0;
137}
138
139static inline int btrfs_ensure_empty_zones(struct btrfs_device *device,
140 u64 start, u64 size)
141{
142 return 0;
143}
144
145static inline int btrfs_load_block_group_zone_info(
146 struct btrfs_block_group *cache, bool new)
147{
148 return 0;
149}
150
151static inline void btrfs_calc_zone_unusable(struct btrfs_block_group *cache) { }
152
153static inline void btrfs_redirty_list_add(struct btrfs_transaction *trans,
154 struct extent_buffer *eb) { }
155static inline void btrfs_free_redirty_list(struct btrfs_transaction *trans) { }
156
157static inline bool btrfs_use_zone_append(struct btrfs_inode *inode, u64 start)
158{
159 return false;
160}
161
162static inline void btrfs_record_physical_zoned(struct inode *inode,
163 u64 file_offset, struct bio *bio)
164{
165}
166
167static inline void btrfs_rewrite_logical_zoned(
168 struct btrfs_ordered_extent *ordered) { }
169
170static inline bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info,
171 struct extent_buffer *eb,
172 struct btrfs_block_group **cache_ret)
173{
174 return true;
175}
176
177static inline void btrfs_revert_meta_write_pointer(
178 struct btrfs_block_group *cache,
179 struct extent_buffer *eb)
180{
181}
182
183static inline int btrfs_zoned_issue_zeroout(struct btrfs_device *device,
184 u64 physical, u64 length)
185{
186 return -EOPNOTSUPP;
187}
188
189static inline int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev,
190 u64 logical, u64 physical_start,
191 u64 physical_pos)
192{
193 return -EOPNOTSUPP;
194}
195
196static inline struct btrfs_device *btrfs_zoned_get_device(
197 struct btrfs_fs_info *fs_info,
198 u64 logical, u64 length)
199{
200 return ERR_PTR(-EOPNOTSUPP);
201}
202
203#endif
204
205static inline bool btrfs_dev_is_sequential(struct btrfs_device *device, u64 pos)
206{
207 struct btrfs_zoned_device_info *zone_info = device->zone_info;
208
209 if (!zone_info)
210 return false;
211
212 return test_bit(pos >> zone_info->zone_size_shift, zone_info->seq_zones);
213}
214
215static inline bool btrfs_dev_is_empty_zone(struct btrfs_device *device, u64 pos)
216{
217 struct btrfs_zoned_device_info *zone_info = device->zone_info;
218
219 if (!zone_info)
220 return true;
221
222 return test_bit(pos >> zone_info->zone_size_shift, zone_info->empty_zones);
223}
224
225static inline void btrfs_dev_set_empty_zone_bit(struct btrfs_device *device,
226 u64 pos, bool set)
227{
228 struct btrfs_zoned_device_info *zone_info = device->zone_info;
229 unsigned int zno;
230
231 if (!zone_info)
232 return;
233
234 zno = pos >> zone_info->zone_size_shift;
235 if (set)
236 set_bit(zno, zone_info->empty_zones);
237 else
238 clear_bit(zno, zone_info->empty_zones);
239}
240
241static inline void btrfs_dev_set_zone_empty(struct btrfs_device *device, u64 pos)
242{
243 btrfs_dev_set_empty_zone_bit(device, pos, true);
244}
245
246static inline void btrfs_dev_clear_zone_empty(struct btrfs_device *device, u64 pos)
247{
248 btrfs_dev_set_empty_zone_bit(device, pos, false);
249}
250
251static inline bool btrfs_check_device_zone_type(const struct btrfs_fs_info *fs_info,
252 struct block_device *bdev)
253{
254 if (btrfs_is_zoned(fs_info)) {
255 /*
256 * We can allow a regular device on a zoned filesystem, because
257 * we will emulate the zoned capabilities.
258 */
259 if (!bdev_is_zoned(bdev))
260 return true;
261
262 return fs_info->zone_size ==
263 (bdev_zone_sectors(bdev) << SECTOR_SHIFT);
264 }
265
266 /* Do not allow Host Manged zoned device */
267 return bdev_zoned_model(bdev) != BLK_ZONED_HM;
268}
269
270static inline bool btrfs_check_super_location(struct btrfs_device *device, u64 pos)
271{
272 /*
273 * On a non-zoned device, any address is OK. On a zoned device,
274 * non-SEQUENTIAL WRITE REQUIRED zones are capable.
275 */
276 return device->zone_info == NULL || !btrfs_dev_is_sequential(device, pos);
277}
278
279static inline bool btrfs_can_zone_reset(struct btrfs_device *device,
280 u64 physical, u64 length)
281{
282 u64 zone_size;
283
284 if (!btrfs_dev_is_sequential(device, physical))
285 return false;
286
287 zone_size = device->zone_info->zone_size;
288 if (!IS_ALIGNED(physical, zone_size) || !IS_ALIGNED(length, zone_size))
289 return false;
290
291 return true;
292}
293
294static inline void btrfs_zoned_meta_io_lock(struct btrfs_fs_info *fs_info)
295{
296 if (!btrfs_is_zoned(fs_info))
297 return;
298 mutex_lock(&fs_info->zoned_meta_io_lock);
299}
300
301static inline void btrfs_zoned_meta_io_unlock(struct btrfs_fs_info *fs_info)
302{
303 if (!btrfs_is_zoned(fs_info))
304 return;
305 mutex_unlock(&fs_info->zoned_meta_io_lock);
306}
307
308static inline void btrfs_clear_treelog_bg(struct btrfs_block_group *bg)
309{
310 struct btrfs_fs_info *fs_info = bg->fs_info;
311
312 if (!btrfs_is_zoned(fs_info))
313 return;
314
315 spin_lock(&fs_info->treelog_bg_lock);
316 if (fs_info->treelog_bg == bg->start)
317 fs_info->treelog_bg = 0;
318 spin_unlock(&fs_info->treelog_bg_lock);
319}
320
321#endif