Commit | Line | Data |
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9888c340 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
0b86a832 CM |
2 | /* |
3 | * Copyright (C) 2007 Oracle. All rights reserved. | |
0b86a832 CM |
4 | */ |
5 | ||
9888c340 DS |
6 | #ifndef BTRFS_VOLUMES_H |
7 | #define BTRFS_VOLUMES_H | |
8790d502 | 8 | |
cea9e445 | 9 | #include <linux/bio.h> |
b2117a39 | 10 | #include <linux/sort.h> |
55e301fd | 11 | #include <linux/btrfs.h> |
8b712842 | 12 | #include "async-thread.h" |
cea9e445 | 13 | |
67a2c45e MX |
14 | extern struct mutex uuid_mutex; |
15 | ||
ee22184b | 16 | #define BTRFS_STRIPE_LEN SZ_64K |
b2117a39 | 17 | |
f2984462 | 18 | struct buffer_head; |
ffbd517d CM |
19 | struct btrfs_pending_bios { |
20 | struct bio *head; | |
21 | struct bio *tail; | |
22 | }; | |
23 | ||
7cc8e58d MX |
24 | /* |
25 | * Use sequence counter to get consistent device stat data on | |
26 | * 32-bit processors. | |
27 | */ | |
28 | #if BITS_PER_LONG==32 && defined(CONFIG_SMP) | |
29 | #include <linux/seqlock.h> | |
30 | #define __BTRFS_NEED_DEVICE_DATA_ORDERED | |
31 | #define btrfs_device_data_ordered_init(device) \ | |
32 | seqcount_init(&device->data_seqcount) | |
33 | #else | |
34 | #define btrfs_device_data_ordered_init(device) do { } while (0) | |
35 | #endif | |
36 | ||
ebbede42 | 37 | #define BTRFS_DEV_STATE_WRITEABLE (0) |
e12c9621 | 38 | #define BTRFS_DEV_STATE_IN_FS_METADATA (1) |
e6e674bd | 39 | #define BTRFS_DEV_STATE_MISSING (2) |
401e29c1 | 40 | #define BTRFS_DEV_STATE_REPLACE_TGT (3) |
1c3063b6 | 41 | #define BTRFS_DEV_STATE_FLUSH_SENT (4) |
ebbede42 | 42 | |
0b86a832 CM |
43 | struct btrfs_device { |
44 | struct list_head dev_list; | |
b3075717 | 45 | struct list_head dev_alloc_list; |
2b82032c | 46 | struct btrfs_fs_devices *fs_devices; |
fb456252 | 47 | struct btrfs_fs_info *fs_info; |
ffbd517d | 48 | |
d5ee37bc MX |
49 | struct rcu_string *name; |
50 | ||
51 | u64 generation; | |
52 | ||
53 | spinlock_t io_lock ____cacheline_aligned; | |
54 | int running_pending; | |
ffbd517d CM |
55 | /* regular prio bios */ |
56 | struct btrfs_pending_bios pending_bios; | |
70fd7614 | 57 | /* sync bios */ |
ffbd517d CM |
58 | struct btrfs_pending_bios pending_sync_bios; |
59 | ||
d5ee37bc MX |
60 | struct block_device *bdev; |
61 | ||
62 | /* the mode sent to blkdev_get */ | |
63 | fmode_t mode; | |
64 | ||
ebbede42 | 65 | unsigned long dev_state; |
58efbc9f | 66 | blk_status_t last_flush_error; |
e0ae9994 | 67 | int flush_bio_sent; |
b3075717 | 68 | |
7cc8e58d MX |
69 | #ifdef __BTRFS_NEED_DEVICE_DATA_ORDERED |
70 | seqcount_t data_seqcount; | |
71 | #endif | |
72 | ||
0b86a832 CM |
73 | /* the internal btrfs device id */ |
74 | u64 devid; | |
75 | ||
6ba40b61 | 76 | /* size of the device in memory */ |
0b86a832 CM |
77 | u64 total_bytes; |
78 | ||
6ba40b61 | 79 | /* size of the device on disk */ |
d6397bae CB |
80 | u64 disk_total_bytes; |
81 | ||
0b86a832 CM |
82 | /* bytes used */ |
83 | u64 bytes_used; | |
84 | ||
85 | /* optimal io alignment for this device */ | |
86 | u32 io_align; | |
87 | ||
88 | /* optimal io width for this device */ | |
89 | u32 io_width; | |
3c45bfc1 DG |
90 | /* type and info about this device */ |
91 | u64 type; | |
0b86a832 CM |
92 | |
93 | /* minimal io size for this device */ | |
94 | u32 sector_size; | |
95 | ||
0b86a832 | 96 | /* physical drive uuid (or lvm uuid) */ |
e17cade2 | 97 | u8 uuid[BTRFS_UUID_SIZE]; |
8b712842 | 98 | |
935e5cc9 MX |
99 | /* |
100 | * size of the device on the current transaction | |
101 | * | |
102 | * This variant is update when committing the transaction, | |
103 | * and protected by device_list_mutex | |
104 | */ | |
105 | u64 commit_total_bytes; | |
106 | ||
ce7213c7 MX |
107 | /* bytes used on the current transaction */ |
108 | u64 commit_bytes_used; | |
935e5cc9 MX |
109 | /* |
110 | * used to manage the device which is resized | |
111 | * | |
112 | * It is protected by chunk_lock. | |
113 | */ | |
114 | struct list_head resized_list; | |
115 | ||
3c45bfc1 | 116 | /* for sending down flush barriers */ |
3c45bfc1 DG |
117 | struct bio *flush_bio; |
118 | struct completion flush_wait; | |
119 | ||
a2de733c | 120 | /* per-device scrub information */ |
cadbc0a0 | 121 | struct scrub_ctx *scrub_ctx; |
a2de733c | 122 | |
d458b054 | 123 | struct btrfs_work work; |
1f78160c | 124 | struct rcu_head rcu; |
90519d66 AJ |
125 | |
126 | /* readahead state */ | |
90519d66 AJ |
127 | atomic_t reada_in_flight; |
128 | u64 reada_next; | |
129 | struct reada_zone *reada_curr_zone; | |
130 | struct radix_tree_root reada_zones; | |
131 | struct radix_tree_root reada_extents; | |
387125fc | 132 | |
442a4f63 SB |
133 | /* disk I/O failure stats. For detailed description refer to |
134 | * enum btrfs_dev_stat_values in ioctl.h */ | |
733f4fbb | 135 | int dev_stats_valid; |
addc3fa7 MX |
136 | |
137 | /* Counter to record the change of device stats */ | |
138 | atomic_t dev_stats_ccnt; | |
442a4f63 | 139 | atomic_t dev_stat_values[BTRFS_DEV_STAT_VALUES_MAX]; |
0b86a832 CM |
140 | }; |
141 | ||
7cc8e58d MX |
142 | /* |
143 | * If we read those variants at the context of their own lock, we needn't | |
144 | * use the following helpers, reading them directly is safe. | |
145 | */ | |
146 | #if BITS_PER_LONG==32 && defined(CONFIG_SMP) | |
147 | #define BTRFS_DEVICE_GETSET_FUNCS(name) \ | |
148 | static inline u64 \ | |
149 | btrfs_device_get_##name(const struct btrfs_device *dev) \ | |
150 | { \ | |
151 | u64 size; \ | |
152 | unsigned int seq; \ | |
153 | \ | |
154 | do { \ | |
155 | seq = read_seqcount_begin(&dev->data_seqcount); \ | |
156 | size = dev->name; \ | |
157 | } while (read_seqcount_retry(&dev->data_seqcount, seq)); \ | |
158 | return size; \ | |
159 | } \ | |
160 | \ | |
161 | static inline void \ | |
162 | btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ | |
163 | { \ | |
164 | preempt_disable(); \ | |
165 | write_seqcount_begin(&dev->data_seqcount); \ | |
166 | dev->name = size; \ | |
167 | write_seqcount_end(&dev->data_seqcount); \ | |
168 | preempt_enable(); \ | |
169 | } | |
170 | #elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPT) | |
171 | #define BTRFS_DEVICE_GETSET_FUNCS(name) \ | |
172 | static inline u64 \ | |
173 | btrfs_device_get_##name(const struct btrfs_device *dev) \ | |
174 | { \ | |
175 | u64 size; \ | |
176 | \ | |
177 | preempt_disable(); \ | |
178 | size = dev->name; \ | |
179 | preempt_enable(); \ | |
180 | return size; \ | |
181 | } \ | |
182 | \ | |
183 | static inline void \ | |
184 | btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ | |
185 | { \ | |
186 | preempt_disable(); \ | |
187 | dev->name = size; \ | |
188 | preempt_enable(); \ | |
189 | } | |
190 | #else | |
191 | #define BTRFS_DEVICE_GETSET_FUNCS(name) \ | |
192 | static inline u64 \ | |
193 | btrfs_device_get_##name(const struct btrfs_device *dev) \ | |
194 | { \ | |
195 | return dev->name; \ | |
196 | } \ | |
197 | \ | |
198 | static inline void \ | |
199 | btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ | |
200 | { \ | |
201 | dev->name = size; \ | |
202 | } | |
203 | #endif | |
204 | ||
205 | BTRFS_DEVICE_GETSET_FUNCS(total_bytes); | |
206 | BTRFS_DEVICE_GETSET_FUNCS(disk_total_bytes); | |
207 | BTRFS_DEVICE_GETSET_FUNCS(bytes_used); | |
208 | ||
8a4b83cc CM |
209 | struct btrfs_fs_devices { |
210 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ | |
211 | ||
8a4b83cc | 212 | u64 num_devices; |
a0af469b | 213 | u64 open_devices; |
2b82032c | 214 | u64 rw_devices; |
cd02dca5 | 215 | u64 missing_devices; |
2b82032c | 216 | u64 total_rw_bytes; |
02db0844 | 217 | u64 total_devices; |
8a4b83cc | 218 | struct block_device *latest_bdev; |
e5e9a520 CM |
219 | |
220 | /* all of the devices in the FS, protected by a mutex | |
221 | * so we can safely walk it to write out the supers without | |
9b011adf WS |
222 | * worrying about add/remove by the multi-device code. |
223 | * Scrubbing super can kick off supers writing by holding | |
224 | * this mutex lock. | |
e5e9a520 CM |
225 | */ |
226 | struct mutex device_list_mutex; | |
8a4b83cc | 227 | struct list_head devices; |
b3075717 | 228 | |
935e5cc9 | 229 | struct list_head resized_devices; |
b3075717 CM |
230 | /* devices not currently being allocated */ |
231 | struct list_head alloc_list; | |
8a4b83cc | 232 | struct list_head list; |
2b82032c YZ |
233 | |
234 | struct btrfs_fs_devices *seed; | |
235 | int seeding; | |
2b82032c YZ |
236 | |
237 | int opened; | |
c289811c CM |
238 | |
239 | /* set when we find or add a device that doesn't have the | |
240 | * nonrot flag set | |
241 | */ | |
242 | int rotating; | |
2e7910d6 | 243 | |
5a13f430 | 244 | struct btrfs_fs_info *fs_info; |
2e7910d6 | 245 | /* sysfs kobjects */ |
c1b7e474 | 246 | struct kobject fsid_kobj; |
2e7910d6 AJ |
247 | struct kobject *device_dir_kobj; |
248 | struct completion kobj_unregister; | |
8a4b83cc CM |
249 | }; |
250 | ||
facc8a22 MX |
251 | #define BTRFS_BIO_INLINE_CSUM_SIZE 64 |
252 | ||
9be3395b CM |
253 | /* |
254 | * we need the mirror number and stripe index to be passed around | |
255 | * the call chain while we are processing end_io (especially errors). | |
256 | * Really, what we need is a btrfs_bio structure that has this info | |
257 | * and is properly sized with its stripe array, but we're not there | |
258 | * quite yet. We have our own btrfs bioset, and all of the bios | |
259 | * we allocate are actually btrfs_io_bios. We'll cram as much of | |
260 | * struct btrfs_bio as we can into this over time. | |
261 | */ | |
facc8a22 | 262 | typedef void (btrfs_io_bio_end_io_t) (struct btrfs_io_bio *bio, int err); |
9be3395b | 263 | struct btrfs_io_bio { |
c1dc0896 MX |
264 | unsigned int mirror_num; |
265 | unsigned int stripe_index; | |
266 | u64 logical; | |
facc8a22 MX |
267 | u8 *csum; |
268 | u8 csum_inline[BTRFS_BIO_INLINE_CSUM_SIZE]; | |
269 | u8 *csum_allocated; | |
270 | btrfs_io_bio_end_io_t *end_io; | |
17347cec | 271 | struct bvec_iter iter; |
fa1bcbe0 DS |
272 | /* |
273 | * This member must come last, bio_alloc_bioset will allocate enough | |
274 | * bytes for entire btrfs_io_bio but relies on bio being last. | |
275 | */ | |
9be3395b CM |
276 | struct bio bio; |
277 | }; | |
278 | ||
279 | static inline struct btrfs_io_bio *btrfs_io_bio(struct bio *bio) | |
280 | { | |
281 | return container_of(bio, struct btrfs_io_bio, bio); | |
282 | } | |
283 | ||
cea9e445 CM |
284 | struct btrfs_bio_stripe { |
285 | struct btrfs_device *dev; | |
286 | u64 physical; | |
fce3bb9a | 287 | u64 length; /* only used for discard mappings */ |
cea9e445 CM |
288 | }; |
289 | ||
a1d3c478 JS |
290 | struct btrfs_bio; |
291 | typedef void (btrfs_bio_end_io_t) (struct btrfs_bio *bio, int err); | |
292 | ||
293 | struct btrfs_bio { | |
140475ae | 294 | refcount_t refs; |
cea9e445 | 295 | atomic_t stripes_pending; |
c404e0dc | 296 | struct btrfs_fs_info *fs_info; |
10f11900 | 297 | u64 map_type; /* get from map_lookup->type */ |
cea9e445 | 298 | bio_end_io_t *end_io; |
7d2b4daa | 299 | struct bio *orig_bio; |
c55f1396 | 300 | unsigned long flags; |
cea9e445 | 301 | void *private; |
a236aed1 CM |
302 | atomic_t error; |
303 | int max_errors; | |
cea9e445 | 304 | int num_stripes; |
a1d3c478 | 305 | int mirror_num; |
2c8cdd6e MX |
306 | int num_tgtdevs; |
307 | int *tgtdev_map; | |
8e5cfb55 ZL |
308 | /* |
309 | * logical block numbers for the start of each stripe | |
310 | * The last one or two are p/q. These are sorted, | |
311 | * so raid_map[0] is the start of our full stripe | |
312 | */ | |
313 | u64 *raid_map; | |
cea9e445 CM |
314 | struct btrfs_bio_stripe stripes[]; |
315 | }; | |
316 | ||
b2117a39 MX |
317 | struct btrfs_device_info { |
318 | struct btrfs_device *dev; | |
319 | u64 dev_offset; | |
320 | u64 max_avail; | |
73c5de00 | 321 | u64 total_avail; |
b2117a39 MX |
322 | }; |
323 | ||
31e50229 LB |
324 | struct btrfs_raid_attr { |
325 | int sub_stripes; /* sub_stripes info for map */ | |
326 | int dev_stripes; /* stripes per dev */ | |
327 | int devs_max; /* max devs to use */ | |
328 | int devs_min; /* min devs needed */ | |
8789f4fe | 329 | int tolerated_failures; /* max tolerated fail devs */ |
31e50229 LB |
330 | int devs_increment; /* ndevs has to be a multiple of this */ |
331 | int ncopies; /* how many copies to data has */ | |
332 | }; | |
333 | ||
af902047 | 334 | extern const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES]; |
621292ba | 335 | extern const int btrfs_raid_mindev_error[BTRFS_NR_RAID_TYPES]; |
af902047 ZL |
336 | extern const u64 btrfs_raid_group[BTRFS_NR_RAID_TYPES]; |
337 | ||
1abe9b8a | 338 | struct map_lookup { |
339 | u64 type; | |
340 | int io_align; | |
341 | int io_width; | |
3d8da678 | 342 | u64 stripe_len; |
1abe9b8a | 343 | int num_stripes; |
344 | int sub_stripes; | |
345 | struct btrfs_bio_stripe stripes[]; | |
346 | }; | |
347 | ||
a2de733c AJ |
348 | #define map_lookup_size(n) (sizeof(struct map_lookup) + \ |
349 | (sizeof(struct btrfs_bio_stripe) * (n))) | |
350 | ||
c9e9f97b | 351 | struct btrfs_balance_args; |
19a39dce | 352 | struct btrfs_balance_progress; |
c9e9f97b ID |
353 | struct btrfs_balance_control { |
354 | struct btrfs_fs_info *fs_info; | |
355 | ||
356 | struct btrfs_balance_args data; | |
357 | struct btrfs_balance_args meta; | |
358 | struct btrfs_balance_args sys; | |
359 | ||
360 | u64 flags; | |
19a39dce ID |
361 | |
362 | struct btrfs_balance_progress stat; | |
c9e9f97b ID |
363 | }; |
364 | ||
cf8cddd3 CH |
365 | enum btrfs_map_op { |
366 | BTRFS_MAP_READ, | |
367 | BTRFS_MAP_WRITE, | |
368 | BTRFS_MAP_DISCARD, | |
369 | BTRFS_MAP_GET_READ_MIRRORS, | |
370 | }; | |
371 | ||
372 | static inline enum btrfs_map_op btrfs_op(struct bio *bio) | |
373 | { | |
374 | switch (bio_op(bio)) { | |
375 | case REQ_OP_DISCARD: | |
376 | return BTRFS_MAP_DISCARD; | |
377 | case REQ_OP_WRITE: | |
378 | return BTRFS_MAP_WRITE; | |
379 | default: | |
380 | WARN_ON_ONCE(1); | |
381 | case REQ_OP_READ: | |
382 | return BTRFS_MAP_READ; | |
383 | } | |
384 | } | |
385 | ||
6d07bcec MX |
386 | int btrfs_account_dev_extents_size(struct btrfs_device *device, u64 start, |
387 | u64 end, u64 *length); | |
6e9606d2 ZL |
388 | void btrfs_get_bbio(struct btrfs_bio *bbio); |
389 | void btrfs_put_bbio(struct btrfs_bio *bbio); | |
cf8cddd3 | 390 | int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, |
cea9e445 | 391 | u64 logical, u64 *length, |
a1d3c478 | 392 | struct btrfs_bio **bbio_ret, int mirror_num); |
cf8cddd3 | 393 | int btrfs_map_sblock(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, |
af8e2d1d | 394 | u64 logical, u64 *length, |
825ad4c9 | 395 | struct btrfs_bio **bbio_ret); |
ab8d0fc4 | 396 | int btrfs_rmap_block(struct btrfs_fs_info *fs_info, |
a512bbf8 YZ |
397 | u64 chunk_start, u64 physical, u64 devid, |
398 | u64 **logical, int *naddrs, int *stripe_len); | |
6bccf3ab | 399 | int btrfs_read_sys_array(struct btrfs_fs_info *fs_info); |
5b4aacef | 400 | int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info); |
0b86a832 | 401 | int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, |
2ff7e61e | 402 | struct btrfs_fs_info *fs_info, u64 type); |
0b86a832 CM |
403 | void btrfs_mapping_init(struct btrfs_mapping_tree *tree); |
404 | void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree); | |
58efbc9f OS |
405 | blk_status_t btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio, |
406 | int mirror_num, int async_submit); | |
8a4b83cc | 407 | int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, |
97288f2c CH |
408 | fmode_t flags, void *holder); |
409 | int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder, | |
8a4b83cc CM |
410 | struct btrfs_fs_devices **fs_devices_ret); |
411 | int btrfs_close_devices(struct btrfs_fs_devices *fs_devices); | |
9b99b115 | 412 | void btrfs_free_extra_devids(struct btrfs_fs_devices *fs_devices, int step); |
88acff64 AJ |
413 | void btrfs_assign_next_active_device(struct btrfs_fs_info *fs_info, |
414 | struct btrfs_device *device, struct btrfs_device *this_dev); | |
2ff7e61e | 415 | int btrfs_find_device_missing_or_by_path(struct btrfs_fs_info *fs_info, |
da353f6b | 416 | const char *device_path, |
7ba15b7d | 417 | struct btrfs_device **device); |
2ff7e61e | 418 | int btrfs_find_device_by_devspec(struct btrfs_fs_info *fs_info, u64 devid, |
da353f6b | 419 | const char *devpath, |
24e0474b | 420 | struct btrfs_device **device); |
12bd2fc0 ID |
421 | struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info, |
422 | const u64 *devid, | |
423 | const u8 *uuid); | |
2ff7e61e | 424 | int btrfs_rm_device(struct btrfs_fs_info *fs_info, |
da353f6b | 425 | const char *device_path, u64 devid); |
ffc5a379 | 426 | void __exit btrfs_cleanup_fs_uuids(void); |
5d964051 | 427 | int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len); |
8f18cf13 CM |
428 | int btrfs_grow_device(struct btrfs_trans_handle *trans, |
429 | struct btrfs_device *device, u64 new_size); | |
aa1b8cd4 | 430 | struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid, |
2b82032c | 431 | u8 *uuid, u8 *fsid); |
8f18cf13 | 432 | int btrfs_shrink_device(struct btrfs_device *device, u64 new_size); |
da353f6b | 433 | int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *path); |
2ff7e61e | 434 | int btrfs_init_dev_replace_tgtdev(struct btrfs_fs_info *fs_info, |
da353f6b | 435 | const char *device_path, |
1c43366d | 436 | struct btrfs_device *srcdev, |
e93c89c1 | 437 | struct btrfs_device **device_out); |
c9e9f97b ID |
438 | int btrfs_balance(struct btrfs_balance_control *bctl, |
439 | struct btrfs_ioctl_balance_args *bargs); | |
2b6ba629 | 440 | int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info); |
68310a5e | 441 | int btrfs_recover_balance(struct btrfs_fs_info *fs_info); |
837d5b6e | 442 | int btrfs_pause_balance(struct btrfs_fs_info *fs_info); |
a7e99c69 | 443 | int btrfs_cancel_balance(struct btrfs_fs_info *fs_info); |
f7a81ea4 | 444 | int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info); |
70f80175 | 445 | int btrfs_check_uuid_tree(struct btrfs_fs_info *fs_info); |
2ff7e61e | 446 | int btrfs_chunk_readonly(struct btrfs_fs_info *fs_info, u64 chunk_offset); |
499f377f JM |
447 | int find_free_dev_extent_start(struct btrfs_transaction *transaction, |
448 | struct btrfs_device *device, u64 num_bytes, | |
449 | u64 search_start, u64 *start, u64 *max_avail); | |
6df9a95e JB |
450 | int find_free_dev_extent(struct btrfs_trans_handle *trans, |
451 | struct btrfs_device *device, u64 num_bytes, | |
ba1bf481 | 452 | u64 *start, u64 *max_avail); |
442a4f63 | 453 | void btrfs_dev_stat_inc_and_print(struct btrfs_device *dev, int index); |
2ff7e61e | 454 | int btrfs_get_dev_stats(struct btrfs_fs_info *fs_info, |
b27f7c0c | 455 | struct btrfs_ioctl_get_dev_stats *stats); |
cb517eab | 456 | void btrfs_init_devices_late(struct btrfs_fs_info *fs_info); |
733f4fbb SB |
457 | int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info); |
458 | int btrfs_run_dev_stats(struct btrfs_trans_handle *trans, | |
459 | struct btrfs_fs_info *fs_info); | |
084b6e7c QW |
460 | void btrfs_rm_dev_replace_remove_srcdev(struct btrfs_fs_info *fs_info, |
461 | struct btrfs_device *srcdev); | |
462 | void btrfs_rm_dev_replace_free_srcdev(struct btrfs_fs_info *fs_info, | |
463 | struct btrfs_device *srcdev); | |
e93c89c1 SB |
464 | void btrfs_destroy_dev_replace_tgtdev(struct btrfs_fs_info *fs_info, |
465 | struct btrfs_device *tgtdev); | |
da353f6b | 466 | void btrfs_scratch_superblocks(struct block_device *bdev, const char *device_path); |
592d92ee | 467 | int btrfs_is_parity_mirror(struct btrfs_fs_info *fs_info, |
e4ff5fb5 | 468 | u64 logical, u64 len); |
2ff7e61e | 469 | unsigned long btrfs_full_stripe_len(struct btrfs_fs_info *fs_info, |
53b381b3 | 470 | u64 logical); |
6df9a95e | 471 | int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans, |
6bccf3ab | 472 | struct btrfs_fs_info *fs_info, |
6df9a95e | 473 | u64 chunk_offset, u64 chunk_size); |
47ab2a6c | 474 | int btrfs_remove_chunk(struct btrfs_trans_handle *trans, |
5b4aacef | 475 | struct btrfs_fs_info *fs_info, u64 chunk_offset); |
addc3fa7 | 476 | |
442a4f63 SB |
477 | static inline void btrfs_dev_stat_inc(struct btrfs_device *dev, |
478 | int index) | |
479 | { | |
480 | atomic_inc(dev->dev_stat_values + index); | |
9deae968 NB |
481 | /* |
482 | * This memory barrier orders stores updating statistics before stores | |
483 | * updating dev_stats_ccnt. | |
484 | * | |
485 | * It pairs with smp_rmb() in btrfs_run_dev_stats(). | |
486 | */ | |
addc3fa7 MX |
487 | smp_mb__before_atomic(); |
488 | atomic_inc(&dev->dev_stats_ccnt); | |
442a4f63 SB |
489 | } |
490 | ||
491 | static inline int btrfs_dev_stat_read(struct btrfs_device *dev, | |
492 | int index) | |
493 | { | |
494 | return atomic_read(dev->dev_stat_values + index); | |
495 | } | |
496 | ||
497 | static inline int btrfs_dev_stat_read_and_reset(struct btrfs_device *dev, | |
498 | int index) | |
499 | { | |
500 | int ret; | |
501 | ||
502 | ret = atomic_xchg(dev->dev_stat_values + index, 0); | |
4660c49f NB |
503 | /* |
504 | * atomic_xchg implies a full memory barriers as per atomic_t.txt: | |
505 | * - RMW operations that have a return value are fully ordered; | |
506 | * | |
507 | * This implicit memory barriers is paired with the smp_rmb in | |
508 | * btrfs_run_dev_stats | |
509 | */ | |
addc3fa7 | 510 | atomic_inc(&dev->dev_stats_ccnt); |
442a4f63 SB |
511 | return ret; |
512 | } | |
513 | ||
514 | static inline void btrfs_dev_stat_set(struct btrfs_device *dev, | |
515 | int index, unsigned long val) | |
516 | { | |
517 | atomic_set(dev->dev_stat_values + index, val); | |
9deae968 NB |
518 | /* |
519 | * This memory barrier orders stores updating statistics before stores | |
520 | * updating dev_stats_ccnt. | |
521 | * | |
522 | * It pairs with smp_rmb() in btrfs_run_dev_stats(). | |
523 | */ | |
addc3fa7 MX |
524 | smp_mb__before_atomic(); |
525 | atomic_inc(&dev->dev_stats_ccnt); | |
442a4f63 SB |
526 | } |
527 | ||
528 | static inline void btrfs_dev_stat_reset(struct btrfs_device *dev, | |
529 | int index) | |
530 | { | |
531 | btrfs_dev_stat_set(dev, index, 0); | |
532 | } | |
935e5cc9 | 533 | |
3e72ee88 QW |
534 | /* |
535 | * Convert block group flags (BTRFS_BLOCK_GROUP_*) to btrfs_raid_types, which | |
536 | * can be used as index to access btrfs_raid_array[]. | |
537 | */ | |
538 | static inline enum btrfs_raid_types btrfs_bg_flags_to_raid_index(u64 flags) | |
539 | { | |
540 | if (flags & BTRFS_BLOCK_GROUP_RAID10) | |
541 | return BTRFS_RAID_RAID10; | |
542 | else if (flags & BTRFS_BLOCK_GROUP_RAID1) | |
543 | return BTRFS_RAID_RAID1; | |
544 | else if (flags & BTRFS_BLOCK_GROUP_DUP) | |
545 | return BTRFS_RAID_DUP; | |
546 | else if (flags & BTRFS_BLOCK_GROUP_RAID0) | |
547 | return BTRFS_RAID_RAID0; | |
548 | else if (flags & BTRFS_BLOCK_GROUP_RAID5) | |
549 | return BTRFS_RAID_RAID5; | |
550 | else if (flags & BTRFS_BLOCK_GROUP_RAID6) | |
551 | return BTRFS_RAID_RAID6; | |
552 | ||
553 | return BTRFS_RAID_SINGLE; /* BTRFS_BLOCK_GROUP_SINGLE */ | |
554 | } | |
555 | ||
935e5cc9 | 556 | void btrfs_update_commit_device_size(struct btrfs_fs_info *fs_info); |
e9b919b1 | 557 | void btrfs_update_commit_device_bytes_used(struct btrfs_transaction *trans); |
04216820 | 558 | |
c73eccf7 | 559 | struct list_head *btrfs_get_fs_uuids(void); |
5a13f430 AJ |
560 | void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info); |
561 | void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info); | |
6528b99d AJ |
562 | bool btrfs_check_rw_degradable(struct btrfs_fs_info *fs_info, |
563 | struct btrfs_device *failing_dev); | |
21634a19 | 564 | |
0b86a832 | 565 | #endif |