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0b86a832 CM |
1 | /* |
2 | * Copyright (C) 2007 Oracle. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public | |
6 | * License v2 as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public | |
14 | * License along with this program; if not, write to the | |
15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
16 | * Boston, MA 021110-1307, USA. | |
17 | */ | |
18 | ||
19 | #ifndef __BTRFS_VOLUMES_ | |
20 | #define __BTRFS_VOLUMES_ | |
8790d502 | 21 | |
cea9e445 | 22 | #include <linux/bio.h> |
b2117a39 | 23 | #include <linux/sort.h> |
55e301fd | 24 | #include <linux/btrfs.h> |
8b712842 | 25 | #include "async-thread.h" |
cea9e445 | 26 | |
67a2c45e MX |
27 | extern struct mutex uuid_mutex; |
28 | ||
b2117a39 MX |
29 | #define BTRFS_STRIPE_LEN (64 * 1024) |
30 | ||
f2984462 | 31 | struct buffer_head; |
ffbd517d CM |
32 | struct btrfs_pending_bios { |
33 | struct bio *head; | |
34 | struct bio *tail; | |
35 | }; | |
36 | ||
7cc8e58d MX |
37 | /* |
38 | * Use sequence counter to get consistent device stat data on | |
39 | * 32-bit processors. | |
40 | */ | |
41 | #if BITS_PER_LONG==32 && defined(CONFIG_SMP) | |
42 | #include <linux/seqlock.h> | |
43 | #define __BTRFS_NEED_DEVICE_DATA_ORDERED | |
44 | #define btrfs_device_data_ordered_init(device) \ | |
45 | seqcount_init(&device->data_seqcount) | |
46 | #else | |
47 | #define btrfs_device_data_ordered_init(device) do { } while (0) | |
48 | #endif | |
49 | ||
0b86a832 CM |
50 | struct btrfs_device { |
51 | struct list_head dev_list; | |
b3075717 | 52 | struct list_head dev_alloc_list; |
2b82032c | 53 | struct btrfs_fs_devices *fs_devices; |
d5ee37bc | 54 | |
0b86a832 | 55 | struct btrfs_root *dev_root; |
ffbd517d | 56 | |
d5ee37bc MX |
57 | struct rcu_string *name; |
58 | ||
59 | u64 generation; | |
60 | ||
61 | spinlock_t io_lock ____cacheline_aligned; | |
62 | int running_pending; | |
ffbd517d CM |
63 | /* regular prio bios */ |
64 | struct btrfs_pending_bios pending_bios; | |
65 | /* WRITE_SYNC bios */ | |
66 | struct btrfs_pending_bios pending_sync_bios; | |
67 | ||
d5ee37bc MX |
68 | struct block_device *bdev; |
69 | ||
70 | /* the mode sent to blkdev_get */ | |
71 | fmode_t mode; | |
72 | ||
2b82032c | 73 | int writeable; |
dfe25020 | 74 | int in_fs_metadata; |
cd02dca5 | 75 | int missing; |
d5e2003c | 76 | int can_discard; |
63a212ab | 77 | int is_tgtdev_for_dev_replace; |
b3075717 | 78 | |
7cc8e58d MX |
79 | #ifdef __BTRFS_NEED_DEVICE_DATA_ORDERED |
80 | seqcount_t data_seqcount; | |
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, | |
113 | * and protected by device_list_mutex | |
114 | */ | |
115 | u64 commit_total_bytes; | |
116 | ||
ce7213c7 MX |
117 | /* bytes used on the current transaction */ |
118 | u64 commit_bytes_used; | |
935e5cc9 MX |
119 | /* |
120 | * used to manage the device which is resized | |
121 | * | |
122 | * It is protected by chunk_lock. | |
123 | */ | |
124 | struct list_head resized_list; | |
125 | ||
3c45bfc1 DG |
126 | /* for sending down flush barriers */ |
127 | int nobarriers; | |
128 | struct bio *flush_bio; | |
129 | struct completion flush_wait; | |
130 | ||
a2de733c | 131 | /* per-device scrub information */ |
d9d181c1 | 132 | struct scrub_ctx *scrub_device; |
a2de733c | 133 | |
d458b054 | 134 | struct btrfs_work work; |
1f78160c XG |
135 | struct rcu_head rcu; |
136 | struct work_struct rcu_work; | |
90519d66 AJ |
137 | |
138 | /* readahead state */ | |
139 | spinlock_t reada_lock; | |
140 | atomic_t reada_in_flight; | |
141 | u64 reada_next; | |
142 | struct reada_zone *reada_curr_zone; | |
143 | struct radix_tree_root reada_zones; | |
144 | struct radix_tree_root reada_extents; | |
387125fc | 145 | |
442a4f63 SB |
146 | /* disk I/O failure stats. For detailed description refer to |
147 | * enum btrfs_dev_stat_values in ioctl.h */ | |
733f4fbb | 148 | int dev_stats_valid; |
addc3fa7 MX |
149 | |
150 | /* Counter to record the change of device stats */ | |
151 | atomic_t dev_stats_ccnt; | |
442a4f63 | 152 | atomic_t dev_stat_values[BTRFS_DEV_STAT_VALUES_MAX]; |
0b86a832 CM |
153 | }; |
154 | ||
7cc8e58d MX |
155 | /* |
156 | * If we read those variants at the context of their own lock, we needn't | |
157 | * use the following helpers, reading them directly is safe. | |
158 | */ | |
159 | #if BITS_PER_LONG==32 && defined(CONFIG_SMP) | |
160 | #define BTRFS_DEVICE_GETSET_FUNCS(name) \ | |
161 | static inline u64 \ | |
162 | btrfs_device_get_##name(const struct btrfs_device *dev) \ | |
163 | { \ | |
164 | u64 size; \ | |
165 | unsigned int seq; \ | |
166 | \ | |
167 | do { \ | |
168 | seq = read_seqcount_begin(&dev->data_seqcount); \ | |
169 | size = dev->name; \ | |
170 | } while (read_seqcount_retry(&dev->data_seqcount, seq)); \ | |
171 | return size; \ | |
172 | } \ | |
173 | \ | |
174 | static inline void \ | |
175 | btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ | |
176 | { \ | |
177 | preempt_disable(); \ | |
178 | write_seqcount_begin(&dev->data_seqcount); \ | |
179 | dev->name = size; \ | |
180 | write_seqcount_end(&dev->data_seqcount); \ | |
181 | preempt_enable(); \ | |
182 | } | |
183 | #elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPT) | |
184 | #define BTRFS_DEVICE_GETSET_FUNCS(name) \ | |
185 | static inline u64 \ | |
186 | btrfs_device_get_##name(const struct btrfs_device *dev) \ | |
187 | { \ | |
188 | u64 size; \ | |
189 | \ | |
190 | preempt_disable(); \ | |
191 | size = dev->name; \ | |
192 | preempt_enable(); \ | |
193 | return size; \ | |
194 | } \ | |
195 | \ | |
196 | static inline void \ | |
197 | btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ | |
198 | { \ | |
199 | preempt_disable(); \ | |
200 | dev->name = size; \ | |
201 | preempt_enable(); \ | |
202 | } | |
203 | #else | |
204 | #define BTRFS_DEVICE_GETSET_FUNCS(name) \ | |
205 | static inline u64 \ | |
206 | btrfs_device_get_##name(const struct btrfs_device *dev) \ | |
207 | { \ | |
208 | return dev->name; \ | |
209 | } \ | |
210 | \ | |
211 | static inline void \ | |
212 | btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ | |
213 | { \ | |
214 | dev->name = size; \ | |
215 | } | |
216 | #endif | |
217 | ||
218 | BTRFS_DEVICE_GETSET_FUNCS(total_bytes); | |
219 | BTRFS_DEVICE_GETSET_FUNCS(disk_total_bytes); | |
220 | BTRFS_DEVICE_GETSET_FUNCS(bytes_used); | |
221 | ||
8a4b83cc CM |
222 | struct btrfs_fs_devices { |
223 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ | |
224 | ||
8a4b83cc | 225 | u64 num_devices; |
a0af469b | 226 | u64 open_devices; |
2b82032c | 227 | u64 rw_devices; |
cd02dca5 | 228 | u64 missing_devices; |
2b82032c | 229 | u64 total_rw_bytes; |
02db0844 | 230 | u64 total_devices; |
8a4b83cc | 231 | struct block_device *latest_bdev; |
e5e9a520 CM |
232 | |
233 | /* all of the devices in the FS, protected by a mutex | |
234 | * so we can safely walk it to write out the supers without | |
9b011adf WS |
235 | * worrying about add/remove by the multi-device code. |
236 | * Scrubbing super can kick off supers writing by holding | |
237 | * this mutex lock. | |
e5e9a520 CM |
238 | */ |
239 | struct mutex device_list_mutex; | |
8a4b83cc | 240 | struct list_head devices; |
b3075717 | 241 | |
935e5cc9 | 242 | struct list_head resized_devices; |
b3075717 CM |
243 | /* devices not currently being allocated */ |
244 | struct list_head alloc_list; | |
8a4b83cc | 245 | struct list_head list; |
2b82032c YZ |
246 | |
247 | struct btrfs_fs_devices *seed; | |
248 | int seeding; | |
2b82032c YZ |
249 | |
250 | int opened; | |
c289811c CM |
251 | |
252 | /* set when we find or add a device that doesn't have the | |
253 | * nonrot flag set | |
254 | */ | |
255 | int rotating; | |
2e7910d6 AJ |
256 | |
257 | /* sysfs kobjects */ | |
258 | struct kobject super_kobj; | |
259 | struct kobject *device_dir_kobj; | |
260 | struct completion kobj_unregister; | |
8a4b83cc CM |
261 | }; |
262 | ||
facc8a22 MX |
263 | #define BTRFS_BIO_INLINE_CSUM_SIZE 64 |
264 | ||
9be3395b CM |
265 | /* |
266 | * we need the mirror number and stripe index to be passed around | |
267 | * the call chain while we are processing end_io (especially errors). | |
268 | * Really, what we need is a btrfs_bio structure that has this info | |
269 | * and is properly sized with its stripe array, but we're not there | |
270 | * quite yet. We have our own btrfs bioset, and all of the bios | |
271 | * we allocate are actually btrfs_io_bios. We'll cram as much of | |
272 | * struct btrfs_bio as we can into this over time. | |
273 | */ | |
facc8a22 | 274 | typedef void (btrfs_io_bio_end_io_t) (struct btrfs_io_bio *bio, int err); |
9be3395b | 275 | struct btrfs_io_bio { |
c1dc0896 MX |
276 | unsigned int mirror_num; |
277 | unsigned int stripe_index; | |
278 | u64 logical; | |
facc8a22 MX |
279 | u8 *csum; |
280 | u8 csum_inline[BTRFS_BIO_INLINE_CSUM_SIZE]; | |
281 | u8 *csum_allocated; | |
282 | btrfs_io_bio_end_io_t *end_io; | |
9be3395b CM |
283 | struct bio bio; |
284 | }; | |
285 | ||
286 | static inline struct btrfs_io_bio *btrfs_io_bio(struct bio *bio) | |
287 | { | |
288 | return container_of(bio, struct btrfs_io_bio, bio); | |
289 | } | |
290 | ||
cea9e445 CM |
291 | struct btrfs_bio_stripe { |
292 | struct btrfs_device *dev; | |
293 | u64 physical; | |
fce3bb9a | 294 | u64 length; /* only used for discard mappings */ |
cea9e445 CM |
295 | }; |
296 | ||
a1d3c478 JS |
297 | struct btrfs_bio; |
298 | typedef void (btrfs_bio_end_io_t) (struct btrfs_bio *bio, int err); | |
299 | ||
2c8cdd6e | 300 | #define BTRFS_BIO_ORIG_BIO_SUBMITTED (1 << 0) |
c55f1396 | 301 | |
a1d3c478 | 302 | struct btrfs_bio { |
6e9606d2 | 303 | atomic_t refs; |
cea9e445 | 304 | atomic_t stripes_pending; |
c404e0dc | 305 | struct btrfs_fs_info *fs_info; |
10f11900 | 306 | u64 map_type; /* get from map_lookup->type */ |
cea9e445 | 307 | bio_end_io_t *end_io; |
7d2b4daa | 308 | struct bio *orig_bio; |
c55f1396 | 309 | unsigned long flags; |
cea9e445 | 310 | void *private; |
a236aed1 CM |
311 | atomic_t error; |
312 | int max_errors; | |
cea9e445 | 313 | int num_stripes; |
a1d3c478 | 314 | int mirror_num; |
2c8cdd6e MX |
315 | int num_tgtdevs; |
316 | int *tgtdev_map; | |
8e5cfb55 ZL |
317 | /* |
318 | * logical block numbers for the start of each stripe | |
319 | * The last one or two are p/q. These are sorted, | |
320 | * so raid_map[0] is the start of our full stripe | |
321 | */ | |
322 | u64 *raid_map; | |
cea9e445 CM |
323 | struct btrfs_bio_stripe stripes[]; |
324 | }; | |
325 | ||
b2117a39 MX |
326 | struct btrfs_device_info { |
327 | struct btrfs_device *dev; | |
328 | u64 dev_offset; | |
329 | u64 max_avail; | |
73c5de00 | 330 | u64 total_avail; |
b2117a39 MX |
331 | }; |
332 | ||
31e50229 LB |
333 | struct btrfs_raid_attr { |
334 | int sub_stripes; /* sub_stripes info for map */ | |
335 | int dev_stripes; /* stripes per dev */ | |
336 | int devs_max; /* max devs to use */ | |
337 | int devs_min; /* min devs needed */ | |
338 | int devs_increment; /* ndevs has to be a multiple of this */ | |
339 | int ncopies; /* how many copies to data has */ | |
340 | }; | |
341 | ||
1abe9b8a | 342 | struct map_lookup { |
343 | u64 type; | |
344 | int io_align; | |
345 | int io_width; | |
346 | int stripe_len; | |
347 | int sector_size; | |
348 | int num_stripes; | |
349 | int sub_stripes; | |
350 | struct btrfs_bio_stripe stripes[]; | |
351 | }; | |
352 | ||
a2de733c AJ |
353 | #define map_lookup_size(n) (sizeof(struct map_lookup) + \ |
354 | (sizeof(struct btrfs_bio_stripe) * (n))) | |
355 | ||
f43ffb60 ID |
356 | /* |
357 | * Restriper's general type filter | |
358 | */ | |
359 | #define BTRFS_BALANCE_DATA (1ULL << 0) | |
360 | #define BTRFS_BALANCE_SYSTEM (1ULL << 1) | |
361 | #define BTRFS_BALANCE_METADATA (1ULL << 2) | |
362 | ||
363 | #define BTRFS_BALANCE_TYPE_MASK (BTRFS_BALANCE_DATA | \ | |
364 | BTRFS_BALANCE_SYSTEM | \ | |
365 | BTRFS_BALANCE_METADATA) | |
e4d8ec0f ID |
366 | |
367 | #define BTRFS_BALANCE_FORCE (1ULL << 3) | |
59641015 | 368 | #define BTRFS_BALANCE_RESUME (1ULL << 4) |
e4d8ec0f | 369 | |
ed25e9b2 ID |
370 | /* |
371 | * Balance filters | |
372 | */ | |
373 | #define BTRFS_BALANCE_ARGS_PROFILES (1ULL << 0) | |
5ce5b3c0 | 374 | #define BTRFS_BALANCE_ARGS_USAGE (1ULL << 1) |
409d404b | 375 | #define BTRFS_BALANCE_ARGS_DEVID (1ULL << 2) |
94e60d5a | 376 | #define BTRFS_BALANCE_ARGS_DRANGE (1ULL << 3) |
ea67176a | 377 | #define BTRFS_BALANCE_ARGS_VRANGE (1ULL << 4) |
7d824b6f | 378 | #define BTRFS_BALANCE_ARGS_LIMIT (1ULL << 5) |
f43ffb60 | 379 | |
cfa4c961 ID |
380 | /* |
381 | * Profile changing flags. When SOFT is set we won't relocate chunk if | |
382 | * it already has the target profile (even though it may be | |
383 | * half-filled). | |
384 | */ | |
e4d8ec0f | 385 | #define BTRFS_BALANCE_ARGS_CONVERT (1ULL << 8) |
cfa4c961 | 386 | #define BTRFS_BALANCE_ARGS_SOFT (1ULL << 9) |
e4d8ec0f | 387 | |
c9e9f97b | 388 | struct btrfs_balance_args; |
19a39dce | 389 | struct btrfs_balance_progress; |
c9e9f97b ID |
390 | struct btrfs_balance_control { |
391 | struct btrfs_fs_info *fs_info; | |
392 | ||
393 | struct btrfs_balance_args data; | |
394 | struct btrfs_balance_args meta; | |
395 | struct btrfs_balance_args sys; | |
396 | ||
397 | u64 flags; | |
19a39dce ID |
398 | |
399 | struct btrfs_balance_progress stat; | |
c9e9f97b ID |
400 | }; |
401 | ||
6d07bcec MX |
402 | int btrfs_account_dev_extents_size(struct btrfs_device *device, u64 start, |
403 | u64 end, u64 *length); | |
6e9606d2 ZL |
404 | void btrfs_get_bbio(struct btrfs_bio *bbio); |
405 | void btrfs_put_bbio(struct btrfs_bio *bbio); | |
3ec706c8 | 406 | int btrfs_map_block(struct btrfs_fs_info *fs_info, int rw, |
cea9e445 | 407 | u64 logical, u64 *length, |
a1d3c478 | 408 | struct btrfs_bio **bbio_ret, int mirror_num); |
af8e2d1d MX |
409 | int btrfs_map_sblock(struct btrfs_fs_info *fs_info, int rw, |
410 | u64 logical, u64 *length, | |
411 | struct btrfs_bio **bbio_ret, int mirror_num, | |
8e5cfb55 | 412 | int need_raid_map); |
a512bbf8 YZ |
413 | int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree, |
414 | u64 chunk_start, u64 physical, u64 devid, | |
415 | u64 **logical, int *naddrs, int *stripe_len); | |
e4404d6e | 416 | int btrfs_read_sys_array(struct btrfs_root *root); |
0b86a832 CM |
417 | int btrfs_read_chunk_tree(struct btrfs_root *root); |
418 | int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, | |
2b82032c | 419 | struct btrfs_root *extent_root, u64 type); |
0b86a832 CM |
420 | void btrfs_mapping_init(struct btrfs_mapping_tree *tree); |
421 | void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree); | |
f188591e | 422 | int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio, |
8b712842 | 423 | int mirror_num, int async_submit); |
8a4b83cc | 424 | int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, |
97288f2c CH |
425 | fmode_t flags, void *holder); |
426 | int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder, | |
8a4b83cc CM |
427 | struct btrfs_fs_devices **fs_devices_ret); |
428 | int btrfs_close_devices(struct btrfs_fs_devices *fs_devices); | |
9eaed21e | 429 | void btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices, int step); |
7ba15b7d SB |
430 | int btrfs_find_device_missing_or_by_path(struct btrfs_root *root, |
431 | char *device_path, | |
432 | struct btrfs_device **device); | |
12bd2fc0 ID |
433 | struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info, |
434 | const u64 *devid, | |
435 | const u8 *uuid); | |
a061fc8d | 436 | int btrfs_rm_device(struct btrfs_root *root, char *device_path); |
143bede5 | 437 | void btrfs_cleanup_fs_uuids(void); |
5d964051 | 438 | int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len); |
8f18cf13 CM |
439 | int btrfs_grow_device(struct btrfs_trans_handle *trans, |
440 | struct btrfs_device *device, u64 new_size); | |
aa1b8cd4 | 441 | struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid, |
2b82032c | 442 | u8 *uuid, u8 *fsid); |
8f18cf13 | 443 | int btrfs_shrink_device(struct btrfs_device *device, u64 new_size); |
788f20eb | 444 | int btrfs_init_new_device(struct btrfs_root *root, char *path); |
e93c89c1 | 445 | int btrfs_init_dev_replace_tgtdev(struct btrfs_root *root, char *device_path, |
1c43366d | 446 | struct btrfs_device *srcdev, |
e93c89c1 | 447 | struct btrfs_device **device_out); |
c9e9f97b ID |
448 | int btrfs_balance(struct btrfs_balance_control *bctl, |
449 | struct btrfs_ioctl_balance_args *bargs); | |
2b6ba629 | 450 | int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info); |
68310a5e | 451 | int btrfs_recover_balance(struct btrfs_fs_info *fs_info); |
837d5b6e | 452 | int btrfs_pause_balance(struct btrfs_fs_info *fs_info); |
a7e99c69 | 453 | int btrfs_cancel_balance(struct btrfs_fs_info *fs_info); |
f7a81ea4 | 454 | int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info); |
70f80175 | 455 | int btrfs_check_uuid_tree(struct btrfs_fs_info *fs_info); |
2b82032c | 456 | int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset); |
6df9a95e JB |
457 | int find_free_dev_extent(struct btrfs_trans_handle *trans, |
458 | struct btrfs_device *device, u64 num_bytes, | |
ba1bf481 | 459 | u64 *start, u64 *max_avail); |
442a4f63 | 460 | void btrfs_dev_stat_inc_and_print(struct btrfs_device *dev, int index); |
c11d2c23 | 461 | int btrfs_get_dev_stats(struct btrfs_root *root, |
b27f7c0c | 462 | struct btrfs_ioctl_get_dev_stats *stats); |
cb517eab | 463 | void btrfs_init_devices_late(struct btrfs_fs_info *fs_info); |
733f4fbb SB |
464 | int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info); |
465 | int btrfs_run_dev_stats(struct btrfs_trans_handle *trans, | |
466 | struct btrfs_fs_info *fs_info); | |
084b6e7c QW |
467 | void btrfs_rm_dev_replace_remove_srcdev(struct btrfs_fs_info *fs_info, |
468 | struct btrfs_device *srcdev); | |
469 | void btrfs_rm_dev_replace_free_srcdev(struct btrfs_fs_info *fs_info, | |
470 | struct btrfs_device *srcdev); | |
e93c89c1 SB |
471 | void btrfs_destroy_dev_replace_tgtdev(struct btrfs_fs_info *fs_info, |
472 | struct btrfs_device *tgtdev); | |
473 | void btrfs_init_dev_replace_tgtdev_for_resume(struct btrfs_fs_info *fs_info, | |
474 | struct btrfs_device *tgtdev); | |
a8a6dab7 | 475 | int btrfs_scratch_superblock(struct btrfs_device *device); |
53b381b3 DW |
476 | int btrfs_is_parity_mirror(struct btrfs_mapping_tree *map_tree, |
477 | u64 logical, u64 len, int mirror_num); | |
478 | unsigned long btrfs_full_stripe_len(struct btrfs_root *root, | |
479 | struct btrfs_mapping_tree *map_tree, | |
480 | u64 logical); | |
6df9a95e JB |
481 | int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans, |
482 | struct btrfs_root *extent_root, | |
483 | u64 chunk_offset, u64 chunk_size); | |
47ab2a6c JB |
484 | int btrfs_remove_chunk(struct btrfs_trans_handle *trans, |
485 | struct btrfs_root *root, u64 chunk_offset); | |
addc3fa7 MX |
486 | |
487 | static inline int btrfs_dev_stats_dirty(struct btrfs_device *dev) | |
488 | { | |
489 | return atomic_read(&dev->dev_stats_ccnt); | |
490 | } | |
491 | ||
442a4f63 SB |
492 | static inline void btrfs_dev_stat_inc(struct btrfs_device *dev, |
493 | int index) | |
494 | { | |
495 | atomic_inc(dev->dev_stat_values + index); | |
addc3fa7 MX |
496 | smp_mb__before_atomic(); |
497 | atomic_inc(&dev->dev_stats_ccnt); | |
442a4f63 SB |
498 | } |
499 | ||
500 | static inline int btrfs_dev_stat_read(struct btrfs_device *dev, | |
501 | int index) | |
502 | { | |
503 | return atomic_read(dev->dev_stat_values + index); | |
504 | } | |
505 | ||
506 | static inline int btrfs_dev_stat_read_and_reset(struct btrfs_device *dev, | |
507 | int index) | |
508 | { | |
509 | int ret; | |
510 | ||
511 | ret = atomic_xchg(dev->dev_stat_values + index, 0); | |
addc3fa7 MX |
512 | smp_mb__before_atomic(); |
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); | |
addc3fa7 MX |
521 | smp_mb__before_atomic(); |
522 | atomic_inc(&dev->dev_stats_ccnt); | |
442a4f63 SB |
523 | } |
524 | ||
525 | static inline void btrfs_dev_stat_reset(struct btrfs_device *dev, | |
526 | int index) | |
527 | { | |
528 | btrfs_dev_stat_set(dev, index, 0); | |
529 | } | |
935e5cc9 MX |
530 | |
531 | void btrfs_update_commit_device_size(struct btrfs_fs_info *fs_info); | |
ce7213c7 MX |
532 | void btrfs_update_commit_device_bytes_used(struct btrfs_root *root, |
533 | struct btrfs_transaction *transaction); | |
04216820 FM |
534 | |
535 | static inline void lock_chunks(struct btrfs_root *root) | |
536 | { | |
537 | mutex_lock(&root->fs_info->chunk_mutex); | |
538 | } | |
539 | ||
540 | static inline void unlock_chunks(struct btrfs_root *root) | |
541 | { | |
542 | mutex_unlock(&root->fs_info->chunk_mutex); | |
543 | } | |
544 | ||
545 | ||
0b86a832 | 546 | #endif |