]>
Commit | Line | Data |
---|---|---|
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 | |
fce466ea QW |
14 | #define BTRFS_MAX_DATA_CHUNK_SIZE (10ULL * SZ_1G) |
15 | ||
67a2c45e MX |
16 | extern struct mutex uuid_mutex; |
17 | ||
ee22184b | 18 | #define BTRFS_STRIPE_LEN SZ_64K |
b2117a39 | 19 | |
f2984462 | 20 | struct buffer_head; |
ffbd517d CM |
21 | struct btrfs_pending_bios { |
22 | struct bio *head; | |
23 | struct bio *tail; | |
24 | }; | |
25 | ||
7cc8e58d MX |
26 | /* |
27 | * Use sequence counter to get consistent device stat data on | |
28 | * 32-bit processors. | |
29 | */ | |
30 | #if BITS_PER_LONG==32 && defined(CONFIG_SMP) | |
31 | #include <linux/seqlock.h> | |
32 | #define __BTRFS_NEED_DEVICE_DATA_ORDERED | |
33 | #define btrfs_device_data_ordered_init(device) \ | |
34 | seqcount_init(&device->data_seqcount) | |
35 | #else | |
36 | #define btrfs_device_data_ordered_init(device) do { } while (0) | |
37 | #endif | |
38 | ||
ebbede42 | 39 | #define BTRFS_DEV_STATE_WRITEABLE (0) |
e12c9621 | 40 | #define BTRFS_DEV_STATE_IN_FS_METADATA (1) |
e6e674bd | 41 | #define BTRFS_DEV_STATE_MISSING (2) |
401e29c1 | 42 | #define BTRFS_DEV_STATE_REPLACE_TGT (3) |
1c3063b6 | 43 | #define BTRFS_DEV_STATE_FLUSH_SENT (4) |
ebbede42 | 44 | |
0b86a832 CM |
45 | struct btrfs_device { |
46 | struct list_head dev_list; | |
b3075717 | 47 | struct list_head dev_alloc_list; |
2b82032c | 48 | struct btrfs_fs_devices *fs_devices; |
fb456252 | 49 | struct btrfs_fs_info *fs_info; |
ffbd517d | 50 | |
d5ee37bc MX |
51 | struct rcu_string *name; |
52 | ||
53 | u64 generation; | |
54 | ||
55 | spinlock_t io_lock ____cacheline_aligned; | |
56 | int running_pending; | |
ffbd517d CM |
57 | /* regular prio bios */ |
58 | struct btrfs_pending_bios pending_bios; | |
70fd7614 | 59 | /* sync bios */ |
ffbd517d CM |
60 | struct btrfs_pending_bios pending_sync_bios; |
61 | ||
d5ee37bc MX |
62 | struct block_device *bdev; |
63 | ||
64 | /* the mode sent to blkdev_get */ | |
65 | fmode_t mode; | |
66 | ||
ebbede42 | 67 | unsigned long dev_state; |
58efbc9f | 68 | blk_status_t last_flush_error; |
e0ae9994 | 69 | int flush_bio_sent; |
b3075717 | 70 | |
7cc8e58d MX |
71 | #ifdef __BTRFS_NEED_DEVICE_DATA_ORDERED |
72 | seqcount_t data_seqcount; | |
73 | #endif | |
74 | ||
0b86a832 CM |
75 | /* the internal btrfs device id */ |
76 | u64 devid; | |
77 | ||
6ba40b61 | 78 | /* size of the device in memory */ |
0b86a832 CM |
79 | u64 total_bytes; |
80 | ||
6ba40b61 | 81 | /* size of the device on disk */ |
d6397bae CB |
82 | u64 disk_total_bytes; |
83 | ||
0b86a832 CM |
84 | /* bytes used */ |
85 | u64 bytes_used; | |
86 | ||
87 | /* optimal io alignment for this device */ | |
88 | u32 io_align; | |
89 | ||
90 | /* optimal io width for this device */ | |
91 | u32 io_width; | |
3c45bfc1 DG |
92 | /* type and info about this device */ |
93 | u64 type; | |
0b86a832 CM |
94 | |
95 | /* minimal io size for this device */ | |
96 | u32 sector_size; | |
97 | ||
0b86a832 | 98 | /* physical drive uuid (or lvm uuid) */ |
e17cade2 | 99 | u8 uuid[BTRFS_UUID_SIZE]; |
8b712842 | 100 | |
935e5cc9 MX |
101 | /* |
102 | * size of the device on the current transaction | |
103 | * | |
104 | * This variant is update when committing the transaction, | |
105 | * and protected by device_list_mutex | |
106 | */ | |
107 | u64 commit_total_bytes; | |
108 | ||
ce7213c7 MX |
109 | /* bytes used on the current transaction */ |
110 | u64 commit_bytes_used; | |
935e5cc9 MX |
111 | /* |
112 | * used to manage the device which is resized | |
113 | * | |
114 | * It is protected by chunk_lock. | |
115 | */ | |
116 | struct list_head resized_list; | |
117 | ||
3c45bfc1 | 118 | /* for sending down flush barriers */ |
3c45bfc1 DG |
119 | struct bio *flush_bio; |
120 | struct completion flush_wait; | |
121 | ||
a2de733c | 122 | /* per-device scrub information */ |
cadbc0a0 | 123 | struct scrub_ctx *scrub_ctx; |
a2de733c | 124 | |
d458b054 | 125 | struct btrfs_work work; |
1f78160c | 126 | struct rcu_head rcu; |
90519d66 AJ |
127 | |
128 | /* readahead state */ | |
90519d66 AJ |
129 | atomic_t reada_in_flight; |
130 | u64 reada_next; | |
131 | struct reada_zone *reada_curr_zone; | |
132 | struct radix_tree_root reada_zones; | |
133 | struct radix_tree_root reada_extents; | |
387125fc | 134 | |
442a4f63 SB |
135 | /* disk I/O failure stats. For detailed description refer to |
136 | * enum btrfs_dev_stat_values in ioctl.h */ | |
733f4fbb | 137 | int dev_stats_valid; |
addc3fa7 MX |
138 | |
139 | /* Counter to record the change of device stats */ | |
140 | atomic_t dev_stats_ccnt; | |
442a4f63 | 141 | atomic_t dev_stat_values[BTRFS_DEV_STAT_VALUES_MAX]; |
0b86a832 CM |
142 | }; |
143 | ||
7cc8e58d MX |
144 | /* |
145 | * If we read those variants at the context of their own lock, we needn't | |
146 | * use the following helpers, reading them directly is safe. | |
147 | */ | |
148 | #if BITS_PER_LONG==32 && defined(CONFIG_SMP) | |
149 | #define BTRFS_DEVICE_GETSET_FUNCS(name) \ | |
150 | static inline u64 \ | |
151 | btrfs_device_get_##name(const struct btrfs_device *dev) \ | |
152 | { \ | |
153 | u64 size; \ | |
154 | unsigned int seq; \ | |
155 | \ | |
156 | do { \ | |
157 | seq = read_seqcount_begin(&dev->data_seqcount); \ | |
158 | size = dev->name; \ | |
159 | } while (read_seqcount_retry(&dev->data_seqcount, seq)); \ | |
160 | return size; \ | |
161 | } \ | |
162 | \ | |
163 | static inline void \ | |
164 | btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ | |
165 | { \ | |
166 | preempt_disable(); \ | |
167 | write_seqcount_begin(&dev->data_seqcount); \ | |
168 | dev->name = size; \ | |
169 | write_seqcount_end(&dev->data_seqcount); \ | |
170 | preempt_enable(); \ | |
171 | } | |
172 | #elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPT) | |
173 | #define BTRFS_DEVICE_GETSET_FUNCS(name) \ | |
174 | static inline u64 \ | |
175 | btrfs_device_get_##name(const struct btrfs_device *dev) \ | |
176 | { \ | |
177 | u64 size; \ | |
178 | \ | |
179 | preempt_disable(); \ | |
180 | size = dev->name; \ | |
181 | preempt_enable(); \ | |
182 | return size; \ | |
183 | } \ | |
184 | \ | |
185 | static inline void \ | |
186 | btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ | |
187 | { \ | |
188 | preempt_disable(); \ | |
189 | dev->name = size; \ | |
190 | preempt_enable(); \ | |
191 | } | |
192 | #else | |
193 | #define BTRFS_DEVICE_GETSET_FUNCS(name) \ | |
194 | static inline u64 \ | |
195 | btrfs_device_get_##name(const struct btrfs_device *dev) \ | |
196 | { \ | |
197 | return dev->name; \ | |
198 | } \ | |
199 | \ | |
200 | static inline void \ | |
201 | btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ | |
202 | { \ | |
203 | dev->name = size; \ | |
204 | } | |
205 | #endif | |
206 | ||
207 | BTRFS_DEVICE_GETSET_FUNCS(total_bytes); | |
208 | BTRFS_DEVICE_GETSET_FUNCS(disk_total_bytes); | |
209 | BTRFS_DEVICE_GETSET_FUNCS(bytes_used); | |
210 | ||
8a4b83cc CM |
211 | struct btrfs_fs_devices { |
212 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ | |
7239ff4b | 213 | u8 metadata_uuid[BTRFS_FSID_SIZE]; |
d1a63002 | 214 | bool fsid_change; |
c4babc5e | 215 | struct list_head fs_list; |
8a4b83cc | 216 | |
8a4b83cc | 217 | u64 num_devices; |
a0af469b | 218 | u64 open_devices; |
2b82032c | 219 | u64 rw_devices; |
cd02dca5 | 220 | u64 missing_devices; |
2b82032c | 221 | u64 total_rw_bytes; |
02db0844 | 222 | u64 total_devices; |
d1a63002 NB |
223 | |
224 | /* Highest generation number of seen devices */ | |
225 | u64 latest_generation; | |
226 | ||
8a4b83cc | 227 | struct block_device *latest_bdev; |
e5e9a520 CM |
228 | |
229 | /* all of the devices in the FS, protected by a mutex | |
230 | * so we can safely walk it to write out the supers without | |
9b011adf WS |
231 | * worrying about add/remove by the multi-device code. |
232 | * Scrubbing super can kick off supers writing by holding | |
233 | * this mutex lock. | |
e5e9a520 CM |
234 | */ |
235 | struct mutex device_list_mutex; | |
8a4b83cc | 236 | struct list_head devices; |
b3075717 | 237 | |
935e5cc9 | 238 | struct list_head resized_devices; |
b3075717 CM |
239 | /* devices not currently being allocated */ |
240 | struct list_head alloc_list; | |
2b82032c YZ |
241 | |
242 | struct btrfs_fs_devices *seed; | |
243 | int seeding; | |
2b82032c YZ |
244 | |
245 | int opened; | |
c289811c CM |
246 | |
247 | /* set when we find or add a device that doesn't have the | |
248 | * nonrot flag set | |
249 | */ | |
250 | int rotating; | |
2e7910d6 | 251 | |
5a13f430 | 252 | struct btrfs_fs_info *fs_info; |
2e7910d6 | 253 | /* sysfs kobjects */ |
c1b7e474 | 254 | struct kobject fsid_kobj; |
2e7910d6 AJ |
255 | struct kobject *device_dir_kobj; |
256 | struct completion kobj_unregister; | |
8a4b83cc CM |
257 | }; |
258 | ||
facc8a22 MX |
259 | #define BTRFS_BIO_INLINE_CSUM_SIZE 64 |
260 | ||
9be3395b CM |
261 | /* |
262 | * we need the mirror number and stripe index to be passed around | |
263 | * the call chain while we are processing end_io (especially errors). | |
264 | * Really, what we need is a btrfs_bio structure that has this info | |
265 | * and is properly sized with its stripe array, but we're not there | |
266 | * quite yet. We have our own btrfs bioset, and all of the bios | |
267 | * we allocate are actually btrfs_io_bios. We'll cram as much of | |
268 | * struct btrfs_bio as we can into this over time. | |
269 | */ | |
270 | struct btrfs_io_bio { | |
c1dc0896 MX |
271 | unsigned int mirror_num; |
272 | unsigned int stripe_index; | |
273 | u64 logical; | |
facc8a22 MX |
274 | u8 *csum; |
275 | u8 csum_inline[BTRFS_BIO_INLINE_CSUM_SIZE]; | |
17347cec | 276 | struct bvec_iter iter; |
fa1bcbe0 DS |
277 | /* |
278 | * This member must come last, bio_alloc_bioset will allocate enough | |
279 | * bytes for entire btrfs_io_bio but relies on bio being last. | |
280 | */ | |
9be3395b CM |
281 | struct bio bio; |
282 | }; | |
283 | ||
284 | static inline struct btrfs_io_bio *btrfs_io_bio(struct bio *bio) | |
285 | { | |
286 | return container_of(bio, struct btrfs_io_bio, bio); | |
287 | } | |
288 | ||
b3a0dd50 DS |
289 | static inline void btrfs_io_bio_free_csum(struct btrfs_io_bio *io_bio) |
290 | { | |
291 | if (io_bio->csum != io_bio->csum_inline) { | |
292 | kfree(io_bio->csum); | |
293 | io_bio->csum = NULL; | |
294 | } | |
295 | } | |
296 | ||
cea9e445 CM |
297 | struct btrfs_bio_stripe { |
298 | struct btrfs_device *dev; | |
299 | u64 physical; | |
fce3bb9a | 300 | u64 length; /* only used for discard mappings */ |
cea9e445 CM |
301 | }; |
302 | ||
a1d3c478 | 303 | struct btrfs_bio { |
140475ae | 304 | refcount_t refs; |
cea9e445 | 305 | atomic_t stripes_pending; |
c404e0dc | 306 | struct btrfs_fs_info *fs_info; |
10f11900 | 307 | u64 map_type; /* get from map_lookup->type */ |
cea9e445 | 308 | bio_end_io_t *end_io; |
7d2b4daa | 309 | struct bio *orig_bio; |
c55f1396 | 310 | unsigned long flags; |
cea9e445 | 311 | void *private; |
a236aed1 CM |
312 | atomic_t error; |
313 | int max_errors; | |
cea9e445 | 314 | int num_stripes; |
a1d3c478 | 315 | int mirror_num; |
2c8cdd6e MX |
316 | int num_tgtdevs; |
317 | int *tgtdev_map; | |
8e5cfb55 ZL |
318 | /* |
319 | * logical block numbers for the start of each stripe | |
320 | * The last one or two are p/q. These are sorted, | |
321 | * so raid_map[0] is the start of our full stripe | |
322 | */ | |
323 | u64 *raid_map; | |
cea9e445 CM |
324 | struct btrfs_bio_stripe stripes[]; |
325 | }; | |
326 | ||
b2117a39 MX |
327 | struct btrfs_device_info { |
328 | struct btrfs_device *dev; | |
329 | u64 dev_offset; | |
330 | u64 max_avail; | |
73c5de00 | 331 | u64 total_avail; |
b2117a39 MX |
332 | }; |
333 | ||
31e50229 LB |
334 | struct btrfs_raid_attr { |
335 | int sub_stripes; /* sub_stripes info for map */ | |
336 | int dev_stripes; /* stripes per dev */ | |
337 | int devs_max; /* max devs to use */ | |
338 | int devs_min; /* min devs needed */ | |
8789f4fe | 339 | int tolerated_failures; /* max tolerated fail devs */ |
31e50229 LB |
340 | int devs_increment; /* ndevs has to be a multiple of this */ |
341 | int ncopies; /* how many copies to data has */ | |
b50836ed HK |
342 | int nparity; /* number of stripes worth of bytes to store |
343 | * parity information */ | |
f9fbcaa2 | 344 | int mindev_error; /* error code if min devs requisite is unmet */ |
ed23467b | 345 | const char raid_name[8]; /* name of the raid */ |
41a6e891 | 346 | u64 bg_flag; /* block group flag of the raid */ |
31e50229 LB |
347 | }; |
348 | ||
af902047 | 349 | extern const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES]; |
af902047 | 350 | |
1abe9b8a | 351 | struct map_lookup { |
352 | u64 type; | |
353 | int io_align; | |
354 | int io_width; | |
3d8da678 | 355 | u64 stripe_len; |
1abe9b8a | 356 | int num_stripes; |
357 | int sub_stripes; | |
cf90d884 | 358 | int verified_stripes; /* For mount time dev extent verification */ |
1abe9b8a | 359 | struct btrfs_bio_stripe stripes[]; |
360 | }; | |
361 | ||
a2de733c AJ |
362 | #define map_lookup_size(n) (sizeof(struct map_lookup) + \ |
363 | (sizeof(struct btrfs_bio_stripe) * (n))) | |
364 | ||
c9e9f97b | 365 | struct btrfs_balance_args; |
19a39dce | 366 | struct btrfs_balance_progress; |
c9e9f97b | 367 | struct btrfs_balance_control { |
c9e9f97b ID |
368 | struct btrfs_balance_args data; |
369 | struct btrfs_balance_args meta; | |
370 | struct btrfs_balance_args sys; | |
371 | ||
372 | u64 flags; | |
19a39dce ID |
373 | |
374 | struct btrfs_balance_progress stat; | |
c9e9f97b ID |
375 | }; |
376 | ||
cf8cddd3 CH |
377 | enum btrfs_map_op { |
378 | BTRFS_MAP_READ, | |
379 | BTRFS_MAP_WRITE, | |
380 | BTRFS_MAP_DISCARD, | |
381 | BTRFS_MAP_GET_READ_MIRRORS, | |
382 | }; | |
383 | ||
384 | static inline enum btrfs_map_op btrfs_op(struct bio *bio) | |
385 | { | |
386 | switch (bio_op(bio)) { | |
387 | case REQ_OP_DISCARD: | |
388 | return BTRFS_MAP_DISCARD; | |
389 | case REQ_OP_WRITE: | |
390 | return BTRFS_MAP_WRITE; | |
391 | default: | |
392 | WARN_ON_ONCE(1); | |
393 | case REQ_OP_READ: | |
394 | return BTRFS_MAP_READ; | |
395 | } | |
396 | } | |
397 | ||
6e9606d2 ZL |
398 | void btrfs_get_bbio(struct btrfs_bio *bbio); |
399 | void btrfs_put_bbio(struct btrfs_bio *bbio); | |
cf8cddd3 | 400 | int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, |
cea9e445 | 401 | u64 logical, u64 *length, |
a1d3c478 | 402 | struct btrfs_bio **bbio_ret, int mirror_num); |
cf8cddd3 | 403 | int btrfs_map_sblock(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, |
af8e2d1d | 404 | u64 logical, u64 *length, |
825ad4c9 | 405 | struct btrfs_bio **bbio_ret); |
63a9c7b9 NB |
406 | int btrfs_rmap_block(struct btrfs_fs_info *fs_info, u64 chunk_start, |
407 | u64 physical, u64 **logical, int *naddrs, int *stripe_len); | |
6bccf3ab | 408 | int btrfs_read_sys_array(struct btrfs_fs_info *fs_info); |
5b4aacef | 409 | int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info); |
c216b203 | 410 | int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, u64 type); |
0b86a832 CM |
411 | void btrfs_mapping_init(struct btrfs_mapping_tree *tree); |
412 | void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree); | |
58efbc9f OS |
413 | blk_status_t btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio, |
414 | int mirror_num, int async_submit); | |
8a4b83cc | 415 | int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, |
97288f2c | 416 | fmode_t flags, void *holder); |
36350e95 GJ |
417 | struct btrfs_device *btrfs_scan_one_device(const char *path, |
418 | fmode_t flags, void *holder); | |
228a73ab | 419 | int btrfs_forget_devices(const char *path); |
8a4b83cc | 420 | int btrfs_close_devices(struct btrfs_fs_devices *fs_devices); |
9b99b115 | 421 | void btrfs_free_extra_devids(struct btrfs_fs_devices *fs_devices, int step); |
d6507cf1 NB |
422 | void btrfs_assign_next_active_device(struct btrfs_device *device, |
423 | struct btrfs_device *this_dev); | |
a27a94c2 NB |
424 | struct btrfs_device *btrfs_find_device_by_devspec(struct btrfs_fs_info *fs_info, |
425 | u64 devid, | |
426 | const char *devpath); | |
12bd2fc0 ID |
427 | struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info, |
428 | const u64 *devid, | |
429 | const u8 *uuid); | |
a425f9d4 | 430 | void btrfs_free_device(struct btrfs_device *device); |
2ff7e61e | 431 | int btrfs_rm_device(struct btrfs_fs_info *fs_info, |
da353f6b | 432 | const char *device_path, u64 devid); |
ffc5a379 | 433 | void __exit btrfs_cleanup_fs_uuids(void); |
5d964051 | 434 | int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len); |
8f18cf13 CM |
435 | int btrfs_grow_device(struct btrfs_trans_handle *trans, |
436 | struct btrfs_device *device, u64 new_size); | |
e4319cd9 | 437 | struct btrfs_device *btrfs_find_device(struct btrfs_fs_devices *fs_devices, |
09ba3bc9 | 438 | u64 devid, u8 *uuid, u8 *fsid, bool seed); |
8f18cf13 | 439 | int btrfs_shrink_device(struct btrfs_device *device, u64 new_size); |
da353f6b | 440 | int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *path); |
6fcf6e2b DS |
441 | int btrfs_balance(struct btrfs_fs_info *fs_info, |
442 | struct btrfs_balance_control *bctl, | |
c9e9f97b | 443 | struct btrfs_ioctl_balance_args *bargs); |
f89e09cf | 444 | void btrfs_describe_block_groups(u64 flags, char *buf, u32 size_buf); |
2b6ba629 | 445 | int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info); |
68310a5e | 446 | int btrfs_recover_balance(struct btrfs_fs_info *fs_info); |
837d5b6e | 447 | int btrfs_pause_balance(struct btrfs_fs_info *fs_info); |
a7e99c69 | 448 | int btrfs_cancel_balance(struct btrfs_fs_info *fs_info); |
f7a81ea4 | 449 | int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info); |
70f80175 | 450 | int btrfs_check_uuid_tree(struct btrfs_fs_info *fs_info); |
2ff7e61e | 451 | int btrfs_chunk_readonly(struct btrfs_fs_info *fs_info, u64 chunk_offset); |
499f377f JM |
452 | int find_free_dev_extent_start(struct btrfs_transaction *transaction, |
453 | struct btrfs_device *device, u64 num_bytes, | |
454 | u64 search_start, u64 *start, u64 *max_avail); | |
6df9a95e JB |
455 | int find_free_dev_extent(struct btrfs_trans_handle *trans, |
456 | struct btrfs_device *device, u64 num_bytes, | |
ba1bf481 | 457 | u64 *start, u64 *max_avail); |
442a4f63 | 458 | void btrfs_dev_stat_inc_and_print(struct btrfs_device *dev, int index); |
2ff7e61e | 459 | int btrfs_get_dev_stats(struct btrfs_fs_info *fs_info, |
b27f7c0c | 460 | struct btrfs_ioctl_get_dev_stats *stats); |
cb517eab | 461 | void btrfs_init_devices_late(struct btrfs_fs_info *fs_info); |
733f4fbb SB |
462 | int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info); |
463 | int btrfs_run_dev_stats(struct btrfs_trans_handle *trans, | |
464 | struct btrfs_fs_info *fs_info); | |
68a9db5f | 465 | void btrfs_rm_dev_replace_remove_srcdev(struct btrfs_device *srcdev); |
084b6e7c QW |
466 | void btrfs_rm_dev_replace_free_srcdev(struct btrfs_fs_info *fs_info, |
467 | struct btrfs_device *srcdev); | |
4f5ad7bd | 468 | void btrfs_destroy_dev_replace_tgtdev(struct btrfs_device *tgtdev); |
da353f6b | 469 | void btrfs_scratch_superblocks(struct block_device *bdev, const char *device_path); |
592d92ee | 470 | int btrfs_is_parity_mirror(struct btrfs_fs_info *fs_info, |
e4ff5fb5 | 471 | u64 logical, u64 len); |
2ff7e61e | 472 | unsigned long btrfs_full_stripe_len(struct btrfs_fs_info *fs_info, |
53b381b3 | 473 | u64 logical); |
6df9a95e | 474 | int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans, |
97aff912 NB |
475 | u64 chunk_offset, u64 chunk_size); |
476 | int btrfs_remove_chunk(struct btrfs_trans_handle *trans, u64 chunk_offset); | |
60ca842e OS |
477 | struct extent_map *btrfs_get_chunk_map(struct btrfs_fs_info *fs_info, |
478 | u64 logical, u64 length); | |
addc3fa7 | 479 | |
442a4f63 SB |
480 | static inline void btrfs_dev_stat_inc(struct btrfs_device *dev, |
481 | int index) | |
482 | { | |
483 | atomic_inc(dev->dev_stat_values + index); | |
9deae968 NB |
484 | /* |
485 | * This memory barrier orders stores updating statistics before stores | |
486 | * updating dev_stats_ccnt. | |
487 | * | |
488 | * It pairs with smp_rmb() in btrfs_run_dev_stats(). | |
489 | */ | |
addc3fa7 MX |
490 | smp_mb__before_atomic(); |
491 | atomic_inc(&dev->dev_stats_ccnt); | |
442a4f63 SB |
492 | } |
493 | ||
494 | static inline int btrfs_dev_stat_read(struct btrfs_device *dev, | |
495 | int index) | |
496 | { | |
497 | return atomic_read(dev->dev_stat_values + index); | |
498 | } | |
499 | ||
500 | static inline int btrfs_dev_stat_read_and_reset(struct btrfs_device *dev, | |
501 | int index) | |
502 | { | |
503 | int ret; | |
504 | ||
505 | ret = atomic_xchg(dev->dev_stat_values + index, 0); | |
4660c49f NB |
506 | /* |
507 | * atomic_xchg implies a full memory barriers as per atomic_t.txt: | |
508 | * - RMW operations that have a return value are fully ordered; | |
509 | * | |
510 | * This implicit memory barriers is paired with the smp_rmb in | |
511 | * btrfs_run_dev_stats | |
512 | */ | |
addc3fa7 | 513 | atomic_inc(&dev->dev_stats_ccnt); |
442a4f63 SB |
514 | return ret; |
515 | } | |
516 | ||
517 | static inline void btrfs_dev_stat_set(struct btrfs_device *dev, | |
518 | int index, unsigned long val) | |
519 | { | |
520 | atomic_set(dev->dev_stat_values + index, val); | |
9deae968 NB |
521 | /* |
522 | * This memory barrier orders stores updating statistics before stores | |
523 | * updating dev_stats_ccnt. | |
524 | * | |
525 | * It pairs with smp_rmb() in btrfs_run_dev_stats(). | |
526 | */ | |
addc3fa7 MX |
527 | smp_mb__before_atomic(); |
528 | atomic_inc(&dev->dev_stats_ccnt); | |
442a4f63 SB |
529 | } |
530 | ||
531 | static inline void btrfs_dev_stat_reset(struct btrfs_device *dev, | |
532 | int index) | |
533 | { | |
534 | btrfs_dev_stat_set(dev, index, 0); | |
535 | } | |
935e5cc9 | 536 | |
3e72ee88 QW |
537 | /* |
538 | * Convert block group flags (BTRFS_BLOCK_GROUP_*) to btrfs_raid_types, which | |
539 | * can be used as index to access btrfs_raid_array[]. | |
540 | */ | |
541 | static inline enum btrfs_raid_types btrfs_bg_flags_to_raid_index(u64 flags) | |
542 | { | |
543 | if (flags & BTRFS_BLOCK_GROUP_RAID10) | |
544 | return BTRFS_RAID_RAID10; | |
545 | else if (flags & BTRFS_BLOCK_GROUP_RAID1) | |
546 | return BTRFS_RAID_RAID1; | |
547 | else if (flags & BTRFS_BLOCK_GROUP_DUP) | |
548 | return BTRFS_RAID_DUP; | |
549 | else if (flags & BTRFS_BLOCK_GROUP_RAID0) | |
550 | return BTRFS_RAID_RAID0; | |
551 | else if (flags & BTRFS_BLOCK_GROUP_RAID5) | |
552 | return BTRFS_RAID_RAID5; | |
553 | else if (flags & BTRFS_BLOCK_GROUP_RAID6) | |
554 | return BTRFS_RAID_RAID6; | |
555 | ||
556 | return BTRFS_RAID_SINGLE; /* BTRFS_BLOCK_GROUP_SINGLE */ | |
557 | } | |
558 | ||
ed23467b AJ |
559 | const char *get_raid_name(enum btrfs_raid_types type); |
560 | ||
935e5cc9 | 561 | void btrfs_update_commit_device_size(struct btrfs_fs_info *fs_info); |
e9b919b1 | 562 | void btrfs_update_commit_device_bytes_used(struct btrfs_transaction *trans); |
04216820 | 563 | |
c73eccf7 | 564 | struct list_head *btrfs_get_fs_uuids(void); |
5a13f430 AJ |
565 | void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info); |
566 | void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info); | |
6528b99d AJ |
567 | bool btrfs_check_rw_degradable(struct btrfs_fs_info *fs_info, |
568 | struct btrfs_device *failing_dev); | |
21634a19 | 569 | |
46df06b8 | 570 | int btrfs_bg_type_to_factor(u64 flags); |
cf90d884 | 571 | int btrfs_verify_dev_extents(struct btrfs_fs_info *fs_info); |
46df06b8 | 572 | |
0b86a832 | 573 | #endif |