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