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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 | |
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 | |
5f141126 NB |
20 | struct btrfs_io_geometry { |
21 | /* remaining bytes before crossing a stripe */ | |
22 | u64 len; | |
23 | /* offset of logical address in chunk */ | |
24 | u64 offset; | |
25 | /* length of single IO stripe */ | |
26 | u64 stripe_len; | |
27 | /* number of stripe where address falls */ | |
28 | u64 stripe_nr; | |
29 | /* offset of address in stripe */ | |
30 | u64 stripe_offset; | |
31 | /* offset of raid56 stripe into the chunk */ | |
32 | u64 raid56_stripe_offset; | |
33 | }; | |
34 | ||
7cc8e58d MX |
35 | /* |
36 | * Use sequence counter to get consistent device stat data on | |
37 | * 32-bit processors. | |
38 | */ | |
39 | #if BITS_PER_LONG==32 && defined(CONFIG_SMP) | |
40 | #include <linux/seqlock.h> | |
41 | #define __BTRFS_NEED_DEVICE_DATA_ORDERED | |
d5c82388 DB |
42 | #define btrfs_device_data_ordered_init(device, info) \ |
43 | seqcount_mutex_init(&device->data_seqcount, &info->chunk_mutex) | |
7cc8e58d | 44 | #else |
d5c82388 | 45 | #define btrfs_device_data_ordered_init(device, info) do { } while (0) |
7cc8e58d MX |
46 | #endif |
47 | ||
ebbede42 | 48 | #define BTRFS_DEV_STATE_WRITEABLE (0) |
e12c9621 | 49 | #define BTRFS_DEV_STATE_IN_FS_METADATA (1) |
e6e674bd | 50 | #define BTRFS_DEV_STATE_MISSING (2) |
401e29c1 | 51 | #define BTRFS_DEV_STATE_REPLACE_TGT (3) |
1c3063b6 | 52 | #define BTRFS_DEV_STATE_FLUSH_SENT (4) |
66d204a1 | 53 | #define BTRFS_DEV_STATE_NO_READA (5) |
ebbede42 | 54 | |
5b316468 NA |
55 | struct btrfs_zoned_device_info; |
56 | ||
0b86a832 | 57 | struct btrfs_device { |
0b6f5d40 NB |
58 | struct list_head dev_list; /* device_list_mutex */ |
59 | struct list_head dev_alloc_list; /* chunk mutex */ | |
bbbf7243 | 60 | struct list_head post_commit_list; /* chunk mutex */ |
2b82032c | 61 | struct btrfs_fs_devices *fs_devices; |
fb456252 | 62 | struct btrfs_fs_info *fs_info; |
ffbd517d | 63 | |
8d1a7aae | 64 | struct rcu_string __rcu *name; |
d5ee37bc MX |
65 | |
66 | u64 generation; | |
67 | ||
d5ee37bc MX |
68 | struct block_device *bdev; |
69 | ||
5b316468 NA |
70 | struct btrfs_zoned_device_info *zone_info; |
71 | ||
d5ee37bc MX |
72 | /* the mode sent to blkdev_get */ |
73 | fmode_t mode; | |
74 | ||
ebbede42 | 75 | unsigned long dev_state; |
58efbc9f | 76 | blk_status_t last_flush_error; |
b3075717 | 77 | |
7cc8e58d | 78 | #ifdef __BTRFS_NEED_DEVICE_DATA_ORDERED |
d5c82388 DB |
79 | /* A seqcount_t with associated chunk_mutex (for lockdep) */ |
80 | seqcount_mutex_t data_seqcount; | |
7cc8e58d MX |
81 | #endif |
82 | ||
0b86a832 CM |
83 | /* the internal btrfs device id */ |
84 | u64 devid; | |
85 | ||
6ba40b61 | 86 | /* size of the device in memory */ |
0b86a832 CM |
87 | u64 total_bytes; |
88 | ||
6ba40b61 | 89 | /* size of the device on disk */ |
d6397bae CB |
90 | u64 disk_total_bytes; |
91 | ||
0b86a832 CM |
92 | /* bytes used */ |
93 | u64 bytes_used; | |
94 | ||
95 | /* optimal io alignment for this device */ | |
96 | u32 io_align; | |
97 | ||
98 | /* optimal io width for this device */ | |
99 | u32 io_width; | |
3c45bfc1 DG |
100 | /* type and info about this device */ |
101 | u64 type; | |
0b86a832 CM |
102 | |
103 | /* minimal io size for this device */ | |
104 | u32 sector_size; | |
105 | ||
0b86a832 | 106 | /* physical drive uuid (or lvm uuid) */ |
e17cade2 | 107 | u8 uuid[BTRFS_UUID_SIZE]; |
8b712842 | 108 | |
935e5cc9 MX |
109 | /* |
110 | * size of the device on the current transaction | |
111 | * | |
112 | * This variant is update when committing the transaction, | |
bbbf7243 | 113 | * and protected by chunk mutex |
935e5cc9 MX |
114 | */ |
115 | u64 commit_total_bytes; | |
116 | ||
ce7213c7 MX |
117 | /* bytes used on the current transaction */ |
118 | u64 commit_bytes_used; | |
935e5cc9 | 119 | |
3c45bfc1 | 120 | /* for sending down flush barriers */ |
3c45bfc1 DG |
121 | struct bio *flush_bio; |
122 | struct completion flush_wait; | |
123 | ||
a2de733c | 124 | /* per-device scrub information */ |
cadbc0a0 | 125 | struct scrub_ctx *scrub_ctx; |
a2de733c | 126 | |
90519d66 | 127 | /* readahead state */ |
90519d66 AJ |
128 | atomic_t reada_in_flight; |
129 | u64 reada_next; | |
130 | struct reada_zone *reada_curr_zone; | |
131 | struct radix_tree_root reada_zones; | |
132 | struct radix_tree_root reada_extents; | |
387125fc | 133 | |
442a4f63 SB |
134 | /* disk I/O failure stats. For detailed description refer to |
135 | * enum btrfs_dev_stat_values in ioctl.h */ | |
733f4fbb | 136 | int dev_stats_valid; |
addc3fa7 MX |
137 | |
138 | /* Counter to record the change of device stats */ | |
139 | atomic_t dev_stats_ccnt; | |
442a4f63 | 140 | atomic_t dev_stat_values[BTRFS_DEV_STAT_VALUES_MAX]; |
1c11b63e JM |
141 | |
142 | struct extent_io_tree alloc_state; | |
668e48af AJ |
143 | |
144 | struct completion kobj_unregister; | |
145 | /* For sysfs/FSID/devinfo/devid/ */ | |
146 | struct kobject devid_kobj; | |
0b86a832 CM |
147 | }; |
148 | ||
7cc8e58d MX |
149 | /* |
150 | * If we read those variants at the context of their own lock, we needn't | |
151 | * use the following helpers, reading them directly is safe. | |
152 | */ | |
153 | #if BITS_PER_LONG==32 && defined(CONFIG_SMP) | |
154 | #define BTRFS_DEVICE_GETSET_FUNCS(name) \ | |
155 | static inline u64 \ | |
156 | btrfs_device_get_##name(const struct btrfs_device *dev) \ | |
157 | { \ | |
158 | u64 size; \ | |
159 | unsigned int seq; \ | |
160 | \ | |
161 | do { \ | |
162 | seq = read_seqcount_begin(&dev->data_seqcount); \ | |
163 | size = dev->name; \ | |
164 | } while (read_seqcount_retry(&dev->data_seqcount, seq)); \ | |
165 | return size; \ | |
166 | } \ | |
167 | \ | |
168 | static inline void \ | |
169 | btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ | |
170 | { \ | |
7cc8e58d MX |
171 | write_seqcount_begin(&dev->data_seqcount); \ |
172 | dev->name = size; \ | |
173 | write_seqcount_end(&dev->data_seqcount); \ | |
7cc8e58d | 174 | } |
94545870 | 175 | #elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPTION) |
7cc8e58d MX |
176 | #define BTRFS_DEVICE_GETSET_FUNCS(name) \ |
177 | static inline u64 \ | |
178 | btrfs_device_get_##name(const struct btrfs_device *dev) \ | |
179 | { \ | |
180 | u64 size; \ | |
181 | \ | |
182 | preempt_disable(); \ | |
183 | size = dev->name; \ | |
184 | preempt_enable(); \ | |
185 | return size; \ | |
186 | } \ | |
187 | \ | |
188 | static inline void \ | |
189 | btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ | |
190 | { \ | |
191 | preempt_disable(); \ | |
192 | dev->name = size; \ | |
193 | preempt_enable(); \ | |
194 | } | |
195 | #else | |
196 | #define BTRFS_DEVICE_GETSET_FUNCS(name) \ | |
197 | static inline u64 \ | |
198 | btrfs_device_get_##name(const struct btrfs_device *dev) \ | |
199 | { \ | |
200 | return dev->name; \ | |
201 | } \ | |
202 | \ | |
203 | static inline void \ | |
204 | btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ | |
205 | { \ | |
206 | dev->name = size; \ | |
207 | } | |
208 | #endif | |
209 | ||
210 | BTRFS_DEVICE_GETSET_FUNCS(total_bytes); | |
211 | BTRFS_DEVICE_GETSET_FUNCS(disk_total_bytes); | |
212 | BTRFS_DEVICE_GETSET_FUNCS(bytes_used); | |
213 | ||
c4a816c6 NA |
214 | enum btrfs_chunk_allocation_policy { |
215 | BTRFS_CHUNK_ALLOC_REGULAR, | |
216 | }; | |
217 | ||
33fd2f71 AJ |
218 | /* |
219 | * Read policies for mirrored block group profiles, read picks the stripe based | |
220 | * on these policies. | |
221 | */ | |
222 | enum btrfs_read_policy { | |
223 | /* Use process PID to choose the stripe */ | |
224 | BTRFS_READ_POLICY_PID, | |
225 | BTRFS_NR_READ_POLICY, | |
226 | }; | |
227 | ||
8a4b83cc CM |
228 | struct btrfs_fs_devices { |
229 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ | |
7239ff4b | 230 | u8 metadata_uuid[BTRFS_FSID_SIZE]; |
d1a63002 | 231 | bool fsid_change; |
c4babc5e | 232 | struct list_head fs_list; |
8a4b83cc | 233 | |
8a4b83cc | 234 | u64 num_devices; |
a0af469b | 235 | u64 open_devices; |
2b82032c | 236 | u64 rw_devices; |
cd02dca5 | 237 | u64 missing_devices; |
2b82032c | 238 | u64 total_rw_bytes; |
02db0844 | 239 | u64 total_devices; |
d1a63002 NB |
240 | |
241 | /* Highest generation number of seen devices */ | |
242 | u64 latest_generation; | |
243 | ||
8a4b83cc | 244 | struct block_device *latest_bdev; |
e5e9a520 CM |
245 | |
246 | /* all of the devices in the FS, protected by a mutex | |
247 | * so we can safely walk it to write out the supers without | |
9b011adf WS |
248 | * worrying about add/remove by the multi-device code. |
249 | * Scrubbing super can kick off supers writing by holding | |
250 | * this mutex lock. | |
e5e9a520 CM |
251 | */ |
252 | struct mutex device_list_mutex; | |
0b6f5d40 NB |
253 | |
254 | /* List of all devices, protected by device_list_mutex */ | |
8a4b83cc | 255 | struct list_head devices; |
b3075717 | 256 | |
0b6f5d40 NB |
257 | /* |
258 | * Devices which can satisfy space allocation. Protected by | |
259 | * chunk_mutex | |
260 | */ | |
b3075717 | 261 | struct list_head alloc_list; |
2b82032c | 262 | |
944d3f9f | 263 | struct list_head seed_list; |
0395d84f | 264 | bool seeding; |
2b82032c YZ |
265 | |
266 | int opened; | |
c289811c CM |
267 | |
268 | /* set when we find or add a device that doesn't have the | |
269 | * nonrot flag set | |
270 | */ | |
7f0432d0 | 271 | bool rotating; |
2e7910d6 | 272 | |
5a13f430 | 273 | struct btrfs_fs_info *fs_info; |
2e7910d6 | 274 | /* sysfs kobjects */ |
c1b7e474 | 275 | struct kobject fsid_kobj; |
b5501504 | 276 | struct kobject *devices_kobj; |
a013d141 | 277 | struct kobject *devinfo_kobj; |
2e7910d6 | 278 | struct completion kobj_unregister; |
c4a816c6 NA |
279 | |
280 | enum btrfs_chunk_allocation_policy chunk_alloc_policy; | |
33fd2f71 AJ |
281 | |
282 | /* Policy used to read the mirrored stripes */ | |
283 | enum btrfs_read_policy read_policy; | |
8a4b83cc CM |
284 | }; |
285 | ||
facc8a22 MX |
286 | #define BTRFS_BIO_INLINE_CSUM_SIZE 64 |
287 | ||
ab4ba2e1 QW |
288 | #define BTRFS_MAX_DEVS(info) ((BTRFS_MAX_ITEM_SIZE(info) \ |
289 | - sizeof(struct btrfs_chunk)) \ | |
290 | / sizeof(struct btrfs_stripe) + 1) | |
291 | ||
292 | #define BTRFS_MAX_DEVS_SYS_CHUNK ((BTRFS_SYSTEM_CHUNK_ARRAY_SIZE \ | |
293 | - 2 * sizeof(struct btrfs_disk_key) \ | |
294 | - 2 * sizeof(struct btrfs_chunk)) \ | |
295 | / sizeof(struct btrfs_stripe) + 1) | |
296 | ||
9be3395b CM |
297 | /* |
298 | * we need the mirror number and stripe index to be passed around | |
299 | * the call chain while we are processing end_io (especially errors). | |
300 | * Really, what we need is a btrfs_bio structure that has this info | |
301 | * and is properly sized with its stripe array, but we're not there | |
302 | * quite yet. We have our own btrfs bioset, and all of the bios | |
303 | * we allocate are actually btrfs_io_bios. We'll cram as much of | |
304 | * struct btrfs_bio as we can into this over time. | |
305 | */ | |
306 | struct btrfs_io_bio { | |
c1dc0896 | 307 | unsigned int mirror_num; |
c31efbdf | 308 | struct btrfs_device *device; |
c1dc0896 | 309 | u64 logical; |
facc8a22 MX |
310 | u8 *csum; |
311 | u8 csum_inline[BTRFS_BIO_INLINE_CSUM_SIZE]; | |
17347cec | 312 | struct bvec_iter iter; |
fa1bcbe0 DS |
313 | /* |
314 | * This member must come last, bio_alloc_bioset will allocate enough | |
315 | * bytes for entire btrfs_io_bio but relies on bio being last. | |
316 | */ | |
9be3395b CM |
317 | struct bio bio; |
318 | }; | |
319 | ||
320 | static inline struct btrfs_io_bio *btrfs_io_bio(struct bio *bio) | |
321 | { | |
322 | return container_of(bio, struct btrfs_io_bio, bio); | |
323 | } | |
324 | ||
b3a0dd50 DS |
325 | static inline void btrfs_io_bio_free_csum(struct btrfs_io_bio *io_bio) |
326 | { | |
327 | if (io_bio->csum != io_bio->csum_inline) { | |
328 | kfree(io_bio->csum); | |
329 | io_bio->csum = NULL; | |
330 | } | |
331 | } | |
332 | ||
cea9e445 CM |
333 | struct btrfs_bio_stripe { |
334 | struct btrfs_device *dev; | |
335 | u64 physical; | |
fce3bb9a | 336 | u64 length; /* only used for discard mappings */ |
cea9e445 CM |
337 | }; |
338 | ||
a1d3c478 | 339 | struct btrfs_bio { |
140475ae | 340 | refcount_t refs; |
cea9e445 | 341 | atomic_t stripes_pending; |
c404e0dc | 342 | struct btrfs_fs_info *fs_info; |
10f11900 | 343 | u64 map_type; /* get from map_lookup->type */ |
cea9e445 | 344 | bio_end_io_t *end_io; |
7d2b4daa | 345 | struct bio *orig_bio; |
cea9e445 | 346 | void *private; |
a236aed1 CM |
347 | atomic_t error; |
348 | int max_errors; | |
cea9e445 | 349 | int num_stripes; |
a1d3c478 | 350 | int mirror_num; |
2c8cdd6e MX |
351 | int num_tgtdevs; |
352 | int *tgtdev_map; | |
8e5cfb55 ZL |
353 | /* |
354 | * logical block numbers for the start of each stripe | |
355 | * The last one or two are p/q. These are sorted, | |
356 | * so raid_map[0] is the start of our full stripe | |
357 | */ | |
358 | u64 *raid_map; | |
cea9e445 CM |
359 | struct btrfs_bio_stripe stripes[]; |
360 | }; | |
361 | ||
b2117a39 MX |
362 | struct btrfs_device_info { |
363 | struct btrfs_device *dev; | |
364 | u64 dev_offset; | |
365 | u64 max_avail; | |
73c5de00 | 366 | u64 total_avail; |
b2117a39 MX |
367 | }; |
368 | ||
31e50229 | 369 | struct btrfs_raid_attr { |
8c3e3582 DS |
370 | u8 sub_stripes; /* sub_stripes info for map */ |
371 | u8 dev_stripes; /* stripes per dev */ | |
372 | u8 devs_max; /* max devs to use */ | |
373 | u8 devs_min; /* min devs needed */ | |
374 | u8 tolerated_failures; /* max tolerated fail devs */ | |
375 | u8 devs_increment; /* ndevs has to be a multiple of this */ | |
376 | u8 ncopies; /* how many copies to data has */ | |
377 | u8 nparity; /* number of stripes worth of bytes to store | |
b50836ed | 378 | * parity information */ |
8c3e3582 | 379 | u8 mindev_error; /* error code if min devs requisite is unmet */ |
ed23467b | 380 | const char raid_name[8]; /* name of the raid */ |
41a6e891 | 381 | u64 bg_flag; /* block group flag of the raid */ |
31e50229 LB |
382 | }; |
383 | ||
af902047 | 384 | extern const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES]; |
af902047 | 385 | |
1abe9b8a | 386 | struct map_lookup { |
387 | u64 type; | |
388 | int io_align; | |
389 | int io_width; | |
3d8da678 | 390 | u64 stripe_len; |
1abe9b8a | 391 | int num_stripes; |
392 | int sub_stripes; | |
cf90d884 | 393 | int verified_stripes; /* For mount time dev extent verification */ |
1abe9b8a | 394 | struct btrfs_bio_stripe stripes[]; |
395 | }; | |
396 | ||
a2de733c AJ |
397 | #define map_lookup_size(n) (sizeof(struct map_lookup) + \ |
398 | (sizeof(struct btrfs_bio_stripe) * (n))) | |
399 | ||
c9e9f97b | 400 | struct btrfs_balance_args; |
19a39dce | 401 | struct btrfs_balance_progress; |
c9e9f97b | 402 | struct btrfs_balance_control { |
c9e9f97b ID |
403 | struct btrfs_balance_args data; |
404 | struct btrfs_balance_args meta; | |
405 | struct btrfs_balance_args sys; | |
406 | ||
407 | u64 flags; | |
19a39dce ID |
408 | |
409 | struct btrfs_balance_progress stat; | |
c9e9f97b ID |
410 | }; |
411 | ||
cf8cddd3 CH |
412 | enum btrfs_map_op { |
413 | BTRFS_MAP_READ, | |
414 | BTRFS_MAP_WRITE, | |
415 | BTRFS_MAP_DISCARD, | |
416 | BTRFS_MAP_GET_READ_MIRRORS, | |
417 | }; | |
418 | ||
419 | static inline enum btrfs_map_op btrfs_op(struct bio *bio) | |
420 | { | |
421 | switch (bio_op(bio)) { | |
422 | case REQ_OP_DISCARD: | |
423 | return BTRFS_MAP_DISCARD; | |
424 | case REQ_OP_WRITE: | |
425 | return BTRFS_MAP_WRITE; | |
426 | default: | |
427 | WARN_ON_ONCE(1); | |
c730ae0c | 428 | fallthrough; |
cf8cddd3 CH |
429 | case REQ_OP_READ: |
430 | return BTRFS_MAP_READ; | |
431 | } | |
432 | } | |
433 | ||
6e9606d2 ZL |
434 | void btrfs_get_bbio(struct btrfs_bio *bbio); |
435 | void btrfs_put_bbio(struct btrfs_bio *bbio); | |
cf8cddd3 | 436 | int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, |
cea9e445 | 437 | u64 logical, u64 *length, |
a1d3c478 | 438 | struct btrfs_bio **bbio_ret, int mirror_num); |
cf8cddd3 | 439 | int btrfs_map_sblock(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, |
af8e2d1d | 440 | u64 logical, u64 *length, |
825ad4c9 | 441 | struct btrfs_bio **bbio_ret); |
5f141126 | 442 | int btrfs_get_io_geometry(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, |
89b798ad | 443 | u64 logical, u64 len, struct btrfs_io_geometry *io_geom); |
6bccf3ab | 444 | int btrfs_read_sys_array(struct btrfs_fs_info *fs_info); |
5b4aacef | 445 | int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info); |
c216b203 | 446 | int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, u64 type); |
c8bf1b67 | 447 | void btrfs_mapping_tree_free(struct extent_map_tree *tree); |
58efbc9f | 448 | blk_status_t btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio, |
08635bae | 449 | int mirror_num); |
8a4b83cc | 450 | int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, |
97288f2c | 451 | fmode_t flags, void *holder); |
36350e95 GJ |
452 | struct btrfs_device *btrfs_scan_one_device(const char *path, |
453 | fmode_t flags, void *holder); | |
228a73ab | 454 | int btrfs_forget_devices(const char *path); |
54eed6ae | 455 | void btrfs_close_devices(struct btrfs_fs_devices *fs_devices); |
bacce86a | 456 | void btrfs_free_extra_devids(struct btrfs_fs_devices *fs_devices); |
d6507cf1 NB |
457 | void btrfs_assign_next_active_device(struct btrfs_device *device, |
458 | struct btrfs_device *this_dev); | |
a27a94c2 NB |
459 | struct btrfs_device *btrfs_find_device_by_devspec(struct btrfs_fs_info *fs_info, |
460 | u64 devid, | |
461 | const char *devpath); | |
12bd2fc0 ID |
462 | struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info, |
463 | const u64 *devid, | |
464 | const u8 *uuid); | |
a425f9d4 | 465 | void btrfs_free_device(struct btrfs_device *device); |
2ff7e61e | 466 | int btrfs_rm_device(struct btrfs_fs_info *fs_info, |
da353f6b | 467 | const char *device_path, u64 devid); |
ffc5a379 | 468 | void __exit btrfs_cleanup_fs_uuids(void); |
5d964051 | 469 | int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len); |
8f18cf13 CM |
470 | int btrfs_grow_device(struct btrfs_trans_handle *trans, |
471 | struct btrfs_device *device, u64 new_size); | |
e4319cd9 | 472 | struct btrfs_device *btrfs_find_device(struct btrfs_fs_devices *fs_devices, |
b2598edf | 473 | u64 devid, u8 *uuid, u8 *fsid); |
8f18cf13 | 474 | int btrfs_shrink_device(struct btrfs_device *device, u64 new_size); |
da353f6b | 475 | int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *path); |
6fcf6e2b DS |
476 | int btrfs_balance(struct btrfs_fs_info *fs_info, |
477 | struct btrfs_balance_control *bctl, | |
c9e9f97b | 478 | struct btrfs_ioctl_balance_args *bargs); |
f89e09cf | 479 | void btrfs_describe_block_groups(u64 flags, char *buf, u32 size_buf); |
2b6ba629 | 480 | int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info); |
68310a5e | 481 | int btrfs_recover_balance(struct btrfs_fs_info *fs_info); |
837d5b6e | 482 | int btrfs_pause_balance(struct btrfs_fs_info *fs_info); |
a7e99c69 | 483 | int btrfs_cancel_balance(struct btrfs_fs_info *fs_info); |
f7a81ea4 | 484 | int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info); |
97f4dd09 | 485 | int btrfs_uuid_scan_kthread(void *data); |
2ff7e61e | 486 | int btrfs_chunk_readonly(struct btrfs_fs_info *fs_info, u64 chunk_offset); |
60dfdf25 | 487 | int find_free_dev_extent(struct btrfs_device *device, u64 num_bytes, |
ba1bf481 | 488 | u64 *start, u64 *max_avail); |
442a4f63 | 489 | void btrfs_dev_stat_inc_and_print(struct btrfs_device *dev, int index); |
2ff7e61e | 490 | int btrfs_get_dev_stats(struct btrfs_fs_info *fs_info, |
b27f7c0c | 491 | struct btrfs_ioctl_get_dev_stats *stats); |
cb517eab | 492 | void btrfs_init_devices_late(struct btrfs_fs_info *fs_info); |
733f4fbb | 493 | int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info); |
196c9d8d | 494 | int btrfs_run_dev_stats(struct btrfs_trans_handle *trans); |
68a9db5f | 495 | void btrfs_rm_dev_replace_remove_srcdev(struct btrfs_device *srcdev); |
65237ee3 | 496 | void btrfs_rm_dev_replace_free_srcdev(struct btrfs_device *srcdev); |
4f5ad7bd | 497 | void btrfs_destroy_dev_replace_tgtdev(struct btrfs_device *tgtdev); |
592d92ee | 498 | int btrfs_is_parity_mirror(struct btrfs_fs_info *fs_info, |
e4ff5fb5 | 499 | u64 logical, u64 len); |
2ff7e61e | 500 | unsigned long btrfs_full_stripe_len(struct btrfs_fs_info *fs_info, |
53b381b3 | 501 | u64 logical); |
6df9a95e | 502 | int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans, |
97aff912 NB |
503 | u64 chunk_offset, u64 chunk_size); |
504 | int btrfs_remove_chunk(struct btrfs_trans_handle *trans, u64 chunk_offset); | |
60ca842e OS |
505 | struct extent_map *btrfs_get_chunk_map(struct btrfs_fs_info *fs_info, |
506 | u64 logical, u64 length); | |
8f32380d | 507 | void btrfs_release_disk_super(struct btrfs_super_block *super); |
addc3fa7 | 508 | |
442a4f63 SB |
509 | static inline void btrfs_dev_stat_inc(struct btrfs_device *dev, |
510 | int index) | |
511 | { | |
512 | atomic_inc(dev->dev_stat_values + index); | |
9deae968 NB |
513 | /* |
514 | * This memory barrier orders stores updating statistics before stores | |
515 | * updating dev_stats_ccnt. | |
516 | * | |
517 | * It pairs with smp_rmb() in btrfs_run_dev_stats(). | |
518 | */ | |
addc3fa7 MX |
519 | smp_mb__before_atomic(); |
520 | atomic_inc(&dev->dev_stats_ccnt); | |
442a4f63 SB |
521 | } |
522 | ||
523 | static inline int btrfs_dev_stat_read(struct btrfs_device *dev, | |
524 | int index) | |
525 | { | |
526 | return atomic_read(dev->dev_stat_values + index); | |
527 | } | |
528 | ||
529 | static inline int btrfs_dev_stat_read_and_reset(struct btrfs_device *dev, | |
530 | int index) | |
531 | { | |
532 | int ret; | |
533 | ||
534 | ret = atomic_xchg(dev->dev_stat_values + index, 0); | |
4660c49f NB |
535 | /* |
536 | * atomic_xchg implies a full memory barriers as per atomic_t.txt: | |
537 | * - RMW operations that have a return value are fully ordered; | |
538 | * | |
539 | * This implicit memory barriers is paired with the smp_rmb in | |
540 | * btrfs_run_dev_stats | |
541 | */ | |
addc3fa7 | 542 | atomic_inc(&dev->dev_stats_ccnt); |
442a4f63 SB |
543 | return ret; |
544 | } | |
545 | ||
546 | static inline void btrfs_dev_stat_set(struct btrfs_device *dev, | |
547 | int index, unsigned long val) | |
548 | { | |
549 | atomic_set(dev->dev_stat_values + index, val); | |
9deae968 NB |
550 | /* |
551 | * This memory barrier orders stores updating statistics before stores | |
552 | * updating dev_stats_ccnt. | |
553 | * | |
554 | * It pairs with smp_rmb() in btrfs_run_dev_stats(). | |
555 | */ | |
addc3fa7 MX |
556 | smp_mb__before_atomic(); |
557 | atomic_inc(&dev->dev_stats_ccnt); | |
442a4f63 SB |
558 | } |
559 | ||
3e72ee88 QW |
560 | /* |
561 | * Convert block group flags (BTRFS_BLOCK_GROUP_*) to btrfs_raid_types, which | |
562 | * can be used as index to access btrfs_raid_array[]. | |
563 | */ | |
564 | static inline enum btrfs_raid_types btrfs_bg_flags_to_raid_index(u64 flags) | |
565 | { | |
566 | if (flags & BTRFS_BLOCK_GROUP_RAID10) | |
567 | return BTRFS_RAID_RAID10; | |
568 | else if (flags & BTRFS_BLOCK_GROUP_RAID1) | |
569 | return BTRFS_RAID_RAID1; | |
47e6f742 DS |
570 | else if (flags & BTRFS_BLOCK_GROUP_RAID1C3) |
571 | return BTRFS_RAID_RAID1C3; | |
8d6fac00 DS |
572 | else if (flags & BTRFS_BLOCK_GROUP_RAID1C4) |
573 | return BTRFS_RAID_RAID1C4; | |
3e72ee88 QW |
574 | else if (flags & BTRFS_BLOCK_GROUP_DUP) |
575 | return BTRFS_RAID_DUP; | |
576 | else if (flags & BTRFS_BLOCK_GROUP_RAID0) | |
577 | return BTRFS_RAID_RAID0; | |
578 | else if (flags & BTRFS_BLOCK_GROUP_RAID5) | |
579 | return BTRFS_RAID_RAID5; | |
580 | else if (flags & BTRFS_BLOCK_GROUP_RAID6) | |
581 | return BTRFS_RAID_RAID6; | |
582 | ||
583 | return BTRFS_RAID_SINGLE; /* BTRFS_BLOCK_GROUP_SINGLE */ | |
584 | } | |
585 | ||
bbbf7243 | 586 | void btrfs_commit_device_sizes(struct btrfs_transaction *trans); |
04216820 | 587 | |
4143cb8b | 588 | struct list_head * __attribute_const__ btrfs_get_fs_uuids(void); |
6528b99d AJ |
589 | bool btrfs_check_rw_degradable(struct btrfs_fs_info *fs_info, |
590 | struct btrfs_device *failing_dev); | |
313b0858 JB |
591 | void btrfs_scratch_superblocks(struct btrfs_fs_info *fs_info, |
592 | struct block_device *bdev, | |
593 | const char *device_path); | |
21634a19 | 594 | |
46df06b8 | 595 | int btrfs_bg_type_to_factor(u64 flags); |
158da513 | 596 | const char *btrfs_bg_type_to_raid_name(u64 flags); |
cf90d884 | 597 | int btrfs_verify_dev_extents(struct btrfs_fs_info *fs_info); |
46df06b8 | 598 | |
0b86a832 | 599 | #endif |