blob: ec571237273208fcb87f7be1c473b0c6a1392b50 [file] [log] [blame]
Chris Mason0b86a832008-03-24 15:01:56 -04001/*
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_
Chris Mason8790d502008-04-03 16:29:03 -040021
Chris Masoncea9e442008-04-09 16:28:12 -040022#include <linux/bio.h>
Miao Xieb2117a32011-01-05 10:07:28 +000023#include <linux/sort.h>
Filipe Brandenburger55e301f2013-01-29 06:04:50 +000024#include <linux/btrfs.h>
Chris Mason8b712842008-06-11 16:50:36 -040025#include "async-thread.h"
Chris Masoncea9e442008-04-09 16:28:12 -040026
Miao Xie67a2c452014-09-03 21:35:43 +080027extern struct mutex uuid_mutex;
28
Miao Xieb2117a32011-01-05 10:07:28 +000029#define BTRFS_STRIPE_LEN (64 * 1024)
30
Chris Masonf2984462008-04-10 16:19:33 -040031struct buffer_head;
Chris Masonffbd5172009-04-20 15:50:09 -040032struct btrfs_pending_bios {
33 struct bio *head;
34 struct bio *tail;
35};
36
Miao Xie7cc8e582014-09-03 21:35:38 +080037/*
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
Chris Mason0b86a832008-03-24 15:01:56 -040050struct btrfs_device {
51 struct list_head dev_list;
Chris Masonb3075712008-04-22 09:22:07 -040052 struct list_head dev_alloc_list;
Yan Zheng2b820322008-11-17 21:11:30 -050053 struct btrfs_fs_devices *fs_devices;
Miao Xied5ee37b2014-07-24 11:37:10 +080054
Chris Mason0b86a832008-03-24 15:01:56 -040055 struct btrfs_root *dev_root;
Chris Masonffbd5172009-04-20 15:50:09 -040056
Miao Xied5ee37b2014-07-24 11:37:10 +080057 struct rcu_string *name;
58
59 u64 generation;
60
61 spinlock_t io_lock ____cacheline_aligned;
62 int running_pending;
Chris Masonffbd5172009-04-20 15:50:09 -040063 /* regular prio bios */
64 struct btrfs_pending_bios pending_bios;
65 /* WRITE_SYNC bios */
66 struct btrfs_pending_bios pending_sync_bios;
67
Miao Xied5ee37b2014-07-24 11:37:10 +080068 struct block_device *bdev;
69
70 /* the mode sent to blkdev_get */
71 fmode_t mode;
72
Yan Zheng2b820322008-11-17 21:11:30 -050073 int writeable;
Chris Masondfe25022008-05-13 13:46:40 -040074 int in_fs_metadata;
Chris Masoncd02dca2010-12-13 14:56:23 -050075 int missing;
Josef Bacikd5e20032011-08-04 14:52:27 +000076 int can_discard;
Stefan Behrens63a212a2012-11-05 18:29:28 +010077 int is_tgtdev_for_dev_replace;
Chris Masonb3075712008-04-22 09:22:07 -040078
Miao Xie7cc8e582014-09-03 21:35:38 +080079#ifdef __BTRFS_NEED_DEVICE_DATA_ORDERED
80 seqcount_t data_seqcount;
81#endif
82
Chris Mason0b86a832008-03-24 15:01:56 -040083 /* the internal btrfs device id */
84 u64 devid;
85
Miao Xie6ba40b62014-07-24 11:37:12 +080086 /* size of the device in memory */
Chris Mason0b86a832008-03-24 15:01:56 -040087 u64 total_bytes;
88
Miao Xie6ba40b62014-07-24 11:37:12 +080089 /* size of the device on disk */
Chris Balld6397ba2009-04-27 07:29:03 -040090 u64 disk_total_bytes;
91
Chris Mason0b86a832008-03-24 15:01:56 -040092 /* 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;
Dulshani Gunawardhana3c45bfc2013-10-31 09:57:33 +0530100 /* type and info about this device */
101 u64 type;
Chris Mason0b86a832008-03-24 15:01:56 -0400102
103 /* minimal io size for this device */
104 u32 sector_size;
105
Chris Mason0b86a832008-03-24 15:01:56 -0400106 /* physical drive uuid (or lvm uuid) */
Chris Masone17cade2008-04-15 15:41:47 -0400107 u8 uuid[BTRFS_UUID_SIZE];
Chris Mason8b712842008-06-11 16:50:36 -0400108
Miao Xie935e5cc2014-09-03 21:35:33 +0800109 /*
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
Miao Xiece7213c2014-09-03 21:35:34 +0800117 /* bytes used on the current transaction */
118 u64 commit_bytes_used;
Miao Xie935e5cc2014-09-03 21:35:33 +0800119 /*
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
Dulshani Gunawardhana3c45bfc2013-10-31 09:57:33 +0530126 /* for sending down flush barriers */
127 int nobarriers;
128 struct bio *flush_bio;
129 struct completion flush_wait;
130
Arne Jansena2de7332011-03-08 14:14:00 +0100131 /* per-device scrub information */
Stefan Behrensd9d181c2012-11-02 09:58:09 +0100132 struct scrub_ctx *scrub_device;
Arne Jansena2de7332011-03-08 14:14:00 +0100133
Qu Wenruod458b052014-02-28 10:46:19 +0800134 struct btrfs_work work;
Xiao Guangrong1f781602011-04-20 10:09:16 +0000135 struct rcu_head rcu;
136 struct work_struct rcu_work;
Arne Jansen90519d62011-05-23 14:30:00 +0200137
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;
Chris Mason387125f2011-11-18 15:07:51 -0500145
Stefan Behrens442a4f62012-05-25 16:06:08 +0200146 /* disk I/O failure stats. For detailed description refer to
147 * enum btrfs_dev_stat_values in ioctl.h */
Stefan Behrens733f4fb2012-05-25 16:06:10 +0200148 int dev_stats_valid;
Miao Xieaddc3fa2014-07-24 11:37:11 +0800149
150 /* Counter to record the change of device stats */
151 atomic_t dev_stats_ccnt;
Stefan Behrens442a4f62012-05-25 16:06:08 +0200152 atomic_t dev_stat_values[BTRFS_DEV_STAT_VALUES_MAX];
Chris Mason0b86a832008-03-24 15:01:56 -0400153};
154
Miao Xie7cc8e582014-09-03 21:35:38 +0800155/*
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) \
161static inline u64 \
162btrfs_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 \
174static inline void \
175btrfs_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) \
185static inline u64 \
186btrfs_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 \
196static inline void \
197btrfs_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) \
205static inline u64 \
206btrfs_device_get_##name(const struct btrfs_device *dev) \
207{ \
208 return dev->name; \
209} \
210 \
211static inline void \
212btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \
213{ \
214 dev->name = size; \
215}
216#endif
217
218BTRFS_DEVICE_GETSET_FUNCS(total_bytes);
219BTRFS_DEVICE_GETSET_FUNCS(disk_total_bytes);
220BTRFS_DEVICE_GETSET_FUNCS(bytes_used);
221
Chris Mason8a4b83c2008-03-24 15:02:07 -0400222struct btrfs_fs_devices {
223 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
224
Chris Mason8a4b83c2008-03-24 15:02:07 -0400225 u64 num_devices;
Chris Masona0af4692008-05-13 16:03:06 -0400226 u64 open_devices;
Yan Zheng2b820322008-11-17 21:11:30 -0500227 u64 rw_devices;
Chris Masoncd02dca2010-12-13 14:56:23 -0500228 u64 missing_devices;
Yan Zheng2b820322008-11-17 21:11:30 -0500229 u64 total_rw_bytes;
Josef Bacik02db0842012-06-21 16:03:58 -0400230 u64 total_devices;
Chris Mason8a4b83c2008-03-24 15:02:07 -0400231 struct block_device *latest_bdev;
Chris Masone5e9a522009-06-10 15:17:02 -0400232
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
Wang Shilong9b011ad2013-10-25 19:12:02 +0800235 * worrying about add/remove by the multi-device code.
236 * Scrubbing super can kick off supers writing by holding
237 * this mutex lock.
Chris Masone5e9a522009-06-10 15:17:02 -0400238 */
239 struct mutex device_list_mutex;
Chris Mason8a4b83c2008-03-24 15:02:07 -0400240 struct list_head devices;
Chris Masonb3075712008-04-22 09:22:07 -0400241
Miao Xie935e5cc2014-09-03 21:35:33 +0800242 struct list_head resized_devices;
Chris Masonb3075712008-04-22 09:22:07 -0400243 /* devices not currently being allocated */
244 struct list_head alloc_list;
Chris Mason8a4b83c2008-03-24 15:02:07 -0400245 struct list_head list;
Yan Zheng2b820322008-11-17 21:11:30 -0500246
247 struct btrfs_fs_devices *seed;
248 int seeding;
Yan Zheng2b820322008-11-17 21:11:30 -0500249
250 int opened;
Chris Masonc2898112009-06-10 09:51:32 -0400251
252 /* set when we find or add a device that doesn't have the
253 * nonrot flag set
254 */
255 int rotating;
Anand Jain2e7910d2015-03-10 06:38:29 +0800256
Anand Jain5a13f432015-03-10 06:38:31 +0800257 struct btrfs_fs_info *fs_info;
Anand Jain2e7910d2015-03-10 06:38:29 +0800258 /* sysfs kobjects */
Anand Jainc1b7e472015-08-14 18:32:50 +0800259 struct kobject fsid_kobj;
Anand Jain2e7910d2015-03-10 06:38:29 +0800260 struct kobject *device_dir_kobj;
261 struct completion kobj_unregister;
Chris Mason8a4b83c2008-03-24 15:02:07 -0400262};
263
Miao Xiefacc8a222013-07-25 19:22:34 +0800264#define BTRFS_BIO_INLINE_CSUM_SIZE 64
265
Chris Mason9be33952013-05-17 18:30:14 -0400266/*
267 * we need the mirror number and stripe index to be passed around
268 * the call chain while we are processing end_io (especially errors).
269 * Really, what we need is a btrfs_bio structure that has this info
270 * and is properly sized with its stripe array, but we're not there
271 * quite yet. We have our own btrfs bioset, and all of the bios
272 * we allocate are actually btrfs_io_bios. We'll cram as much of
273 * struct btrfs_bio as we can into this over time.
274 */
Miao Xiefacc8a222013-07-25 19:22:34 +0800275typedef void (btrfs_io_bio_end_io_t) (struct btrfs_io_bio *bio, int err);
Chris Mason9be33952013-05-17 18:30:14 -0400276struct btrfs_io_bio {
Miao Xiec1dc0892014-09-12 18:43:56 +0800277 unsigned int mirror_num;
278 unsigned int stripe_index;
279 u64 logical;
Miao Xiefacc8a222013-07-25 19:22:34 +0800280 u8 *csum;
281 u8 csum_inline[BTRFS_BIO_INLINE_CSUM_SIZE];
282 u8 *csum_allocated;
283 btrfs_io_bio_end_io_t *end_io;
Chris Mason9be33952013-05-17 18:30:14 -0400284 struct bio bio;
285};
286
287static inline struct btrfs_io_bio *btrfs_io_bio(struct bio *bio)
288{
289 return container_of(bio, struct btrfs_io_bio, bio);
290}
291
Chris Masoncea9e442008-04-09 16:28:12 -0400292struct btrfs_bio_stripe {
293 struct btrfs_device *dev;
294 u64 physical;
Li Dongyangfce3bb92011-03-24 10:24:26 +0000295 u64 length; /* only used for discard mappings */
Chris Masoncea9e442008-04-09 16:28:12 -0400296};
297
Jan Schmidta1d3c472011-08-04 17:15:33 +0200298struct btrfs_bio;
299typedef void (btrfs_bio_end_io_t) (struct btrfs_bio *bio, int err);
300
301struct btrfs_bio {
Zhao Lei6e9606d2015-01-20 15:11:34 +0800302 atomic_t refs;
Chris Masoncea9e442008-04-09 16:28:12 -0400303 atomic_t stripes_pending;
Miao Xiec404e0d2014-01-30 16:46:55 +0800304 struct btrfs_fs_info *fs_info;
Zhao Lei10f11902015-01-20 15:11:43 +0800305 u64 map_type; /* get from map_lookup->type */
Chris Masoncea9e442008-04-09 16:28:12 -0400306 bio_end_io_t *end_io;
Chris Mason7d2b4da2008-08-05 10:13:57 -0400307 struct bio *orig_bio;
Miao Xiec55f1392014-06-19 10:42:54 +0800308 unsigned long flags;
Chris Masoncea9e442008-04-09 16:28:12 -0400309 void *private;
Chris Masona236aed2008-04-29 09:38:00 -0400310 atomic_t error;
311 int max_errors;
Chris Masoncea9e442008-04-09 16:28:12 -0400312 int num_stripes;
Jan Schmidta1d3c472011-08-04 17:15:33 +0200313 int mirror_num;
Miao Xie2c8cdd62014-11-14 16:06:25 +0800314 int num_tgtdevs;
315 int *tgtdev_map;
Zhao Lei8e5cfb52015-01-20 15:11:33 +0800316 /*
317 * logical block numbers for the start of each stripe
318 * The last one or two are p/q. These are sorted,
319 * so raid_map[0] is the start of our full stripe
320 */
321 u64 *raid_map;
Chris Masoncea9e442008-04-09 16:28:12 -0400322 struct btrfs_bio_stripe stripes[];
323};
324
Miao Xieb2117a32011-01-05 10:07:28 +0000325struct btrfs_device_info {
326 struct btrfs_device *dev;
327 u64 dev_offset;
328 u64 max_avail;
Arne Jansen73c5de02011-04-12 12:07:57 +0200329 u64 total_avail;
Miao Xieb2117a32011-01-05 10:07:28 +0000330};
331
Liu Bo31e50222012-11-21 14:18:10 +0000332struct btrfs_raid_attr {
333 int sub_stripes; /* sub_stripes info for map */
334 int dev_stripes; /* stripes per dev */
335 int devs_max; /* max devs to use */
336 int devs_min; /* min devs needed */
Zhao Lei8789f4f2015-09-15 21:08:07 +0800337 int tolerated_failures; /* max tolerated fail devs */
Liu Bo31e50222012-11-21 14:18:10 +0000338 int devs_increment; /* ndevs has to be a multiple of this */
339 int ncopies; /* how many copies to data has */
340};
341
Zhao Leiaf902042015-09-15 21:08:06 +0800342extern const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES];
343
344extern const u64 btrfs_raid_group[BTRFS_NR_RAID_TYPES];
345
liubo1abe9b82011-03-24 11:18:59 +0000346struct map_lookup {
347 u64 type;
348 int io_align;
349 int io_width;
350 int stripe_len;
351 int sector_size;
352 int num_stripes;
353 int sub_stripes;
354 struct btrfs_bio_stripe stripes[];
355};
356
Arne Jansena2de7332011-03-08 14:14:00 +0100357#define map_lookup_size(n) (sizeof(struct map_lookup) + \
358 (sizeof(struct btrfs_bio_stripe) * (n)))
359
Ilya Dryomovf43ffb62012-01-16 22:04:47 +0200360/*
361 * Restriper's general type filter
362 */
363#define BTRFS_BALANCE_DATA (1ULL << 0)
364#define BTRFS_BALANCE_SYSTEM (1ULL << 1)
365#define BTRFS_BALANCE_METADATA (1ULL << 2)
366
367#define BTRFS_BALANCE_TYPE_MASK (BTRFS_BALANCE_DATA | \
368 BTRFS_BALANCE_SYSTEM | \
369 BTRFS_BALANCE_METADATA)
Ilya Dryomove4d8ec02012-01-16 22:04:48 +0200370
371#define BTRFS_BALANCE_FORCE (1ULL << 3)
Ilya Dryomov59641012012-01-16 22:04:48 +0200372#define BTRFS_BALANCE_RESUME (1ULL << 4)
Ilya Dryomove4d8ec02012-01-16 22:04:48 +0200373
Ilya Dryomoved25e9b2012-01-16 22:04:47 +0200374/*
375 * Balance filters
376 */
377#define BTRFS_BALANCE_ARGS_PROFILES (1ULL << 0)
Ilya Dryomov5ce5b3c2012-01-16 22:04:47 +0200378#define BTRFS_BALANCE_ARGS_USAGE (1ULL << 1)
Ilya Dryomov409d4042012-01-16 22:04:47 +0200379#define BTRFS_BALANCE_ARGS_DEVID (1ULL << 2)
Ilya Dryomov94e60d52012-01-16 22:04:48 +0200380#define BTRFS_BALANCE_ARGS_DRANGE (1ULL << 3)
Ilya Dryomovea671762012-01-16 22:04:48 +0200381#define BTRFS_BALANCE_ARGS_VRANGE (1ULL << 4)
David Sterba7d824b62014-05-07 17:37:51 +0200382#define BTRFS_BALANCE_ARGS_LIMIT (1ULL << 5)
David Sterba12907fc2015-10-10 17:16:50 +0200383#define BTRFS_BALANCE_ARGS_LIMIT_RANGE (1ULL << 6)
Gabríel Arthúr Péturssondee32d02015-09-28 22:32:41 +0000384#define BTRFS_BALANCE_ARGS_STRIPES_RANGE (1ULL << 7)
David Sterbabc309462015-10-20 18:22:13 +0200385#define BTRFS_BALANCE_ARGS_USAGE_RANGE (1ULL << 8)
Ilya Dryomovf43ffb62012-01-16 22:04:47 +0200386
David Sterba849ef922015-10-12 16:55:54 +0200387#define BTRFS_BALANCE_ARGS_MASK \
388 (BTRFS_BALANCE_ARGS_PROFILES | \
389 BTRFS_BALANCE_ARGS_USAGE | \
390 BTRFS_BALANCE_ARGS_DEVID | \
391 BTRFS_BALANCE_ARGS_DRANGE | \
392 BTRFS_BALANCE_ARGS_VRANGE | \
David Sterbab66d62b2015-10-16 19:15:50 +0200393 BTRFS_BALANCE_ARGS_LIMIT | \
394 BTRFS_BALANCE_ARGS_LIMIT_RANGE | \
395 BTRFS_BALANCE_ARGS_STRIPES_RANGE | \
396 BTRFS_BALANCE_ARGS_USAGE_RANGE)
David Sterba849ef922015-10-12 16:55:54 +0200397
Ilya Dryomovcfa4c962012-01-16 22:04:48 +0200398/*
399 * Profile changing flags. When SOFT is set we won't relocate chunk if
400 * it already has the target profile (even though it may be
401 * half-filled).
402 */
Ilya Dryomove4d8ec02012-01-16 22:04:48 +0200403#define BTRFS_BALANCE_ARGS_CONVERT (1ULL << 8)
Ilya Dryomovcfa4c962012-01-16 22:04:48 +0200404#define BTRFS_BALANCE_ARGS_SOFT (1ULL << 9)
Ilya Dryomove4d8ec02012-01-16 22:04:48 +0200405
Ilya Dryomovc9e9f972012-01-16 22:04:47 +0200406struct btrfs_balance_args;
Ilya Dryomov19a39dc2012-01-16 22:04:49 +0200407struct btrfs_balance_progress;
Ilya Dryomovc9e9f972012-01-16 22:04:47 +0200408struct btrfs_balance_control {
409 struct btrfs_fs_info *fs_info;
410
411 struct btrfs_balance_args data;
412 struct btrfs_balance_args meta;
413 struct btrfs_balance_args sys;
414
415 u64 flags;
Ilya Dryomov19a39dc2012-01-16 22:04:49 +0200416
417 struct btrfs_balance_progress stat;
Ilya Dryomovc9e9f972012-01-16 22:04:47 +0200418};
419
Miao Xie6d07bce2011-01-05 10:07:31 +0000420int btrfs_account_dev_extents_size(struct btrfs_device *device, u64 start,
421 u64 end, u64 *length);
Zhao Lei6e9606d2015-01-20 15:11:34 +0800422void btrfs_get_bbio(struct btrfs_bio *bbio);
423void btrfs_put_bbio(struct btrfs_bio *bbio);
Stefan Behrens3ec706c2012-11-05 15:46:42 +0100424int btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
Chris Masoncea9e442008-04-09 16:28:12 -0400425 u64 logical, u64 *length,
Jan Schmidta1d3c472011-08-04 17:15:33 +0200426 struct btrfs_bio **bbio_ret, int mirror_num);
Miao Xieaf8e2d12014-10-23 14:42:50 +0800427int btrfs_map_sblock(struct btrfs_fs_info *fs_info, int rw,
428 u64 logical, u64 *length,
429 struct btrfs_bio **bbio_ret, int mirror_num,
Zhao Lei8e5cfb52015-01-20 15:11:33 +0800430 int need_raid_map);
Yan Zhenga512bbf2008-12-08 16:46:26 -0500431int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
432 u64 chunk_start, u64 physical, u64 devid,
433 u64 **logical, int *naddrs, int *stripe_len);
Yan Zhenge4404d62008-12-12 10:03:26 -0500434int btrfs_read_sys_array(struct btrfs_root *root);
Chris Mason0b86a832008-03-24 15:01:56 -0400435int btrfs_read_chunk_tree(struct btrfs_root *root);
436int btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
Yan Zheng2b820322008-11-17 21:11:30 -0500437 struct btrfs_root *extent_root, u64 type);
Chris Mason0b86a832008-03-24 15:01:56 -0400438void btrfs_mapping_init(struct btrfs_mapping_tree *tree);
439void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree);
Chris Masonf1885912008-04-09 16:28:12 -0400440int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio,
Chris Mason8b712842008-06-11 16:50:36 -0400441 int mirror_num, int async_submit);
Chris Mason8a4b83c2008-03-24 15:02:07 -0400442int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
Christoph Hellwig97288f22008-12-02 06:36:09 -0500443 fmode_t flags, void *holder);
444int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder,
Chris Mason8a4b83c2008-03-24 15:02:07 -0400445 struct btrfs_fs_devices **fs_devices_ret);
446int btrfs_close_devices(struct btrfs_fs_devices *fs_devices);
Eric Sandeen9eaed212014-08-01 18:12:35 -0500447void btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices, int step);
Stefan Behrens7ba15b72012-11-05 14:42:30 +0100448int btrfs_find_device_missing_or_by_path(struct btrfs_root *root,
449 char *device_path,
450 struct btrfs_device **device);
Ilya Dryomov12bd2fc2013-08-23 13:20:17 +0300451struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info,
452 const u64 *devid,
453 const u8 *uuid);
Chris Masona061fc82008-05-07 11:43:44 -0400454int btrfs_rm_device(struct btrfs_root *root, char *device_path);
Jeff Mahoney143bede2012-03-01 14:56:26 +0100455void btrfs_cleanup_fs_uuids(void);
Stefan Behrens5d964052012-11-05 14:59:07 +0100456int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len);
Chris Mason8f18cf12008-04-25 16:53:30 -0400457int btrfs_grow_device(struct btrfs_trans_handle *trans,
458 struct btrfs_device *device, u64 new_size);
Stefan Behrensaa1b8cd2012-11-05 17:03:39 +0100459struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid,
Yan Zheng2b820322008-11-17 21:11:30 -0500460 u8 *uuid, u8 *fsid);
Chris Mason8f18cf12008-04-25 16:53:30 -0400461int btrfs_shrink_device(struct btrfs_device *device, u64 new_size);
Chris Mason788f20e2008-04-28 15:29:42 -0400462int btrfs_init_new_device(struct btrfs_root *root, char *path);
Stefan Behrense93c89c2012-11-05 17:33:06 +0100463int btrfs_init_dev_replace_tgtdev(struct btrfs_root *root, char *device_path,
Miao Xie1c433662014-09-03 21:35:32 +0800464 struct btrfs_device *srcdev,
Stefan Behrense93c89c2012-11-05 17:33:06 +0100465 struct btrfs_device **device_out);
Ilya Dryomovc9e9f972012-01-16 22:04:47 +0200466int btrfs_balance(struct btrfs_balance_control *bctl,
467 struct btrfs_ioctl_balance_args *bargs);
Ilya Dryomov2b6ba622012-06-22 12:24:13 -0600468int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info);
Ilya Dryomov68310a52012-06-22 12:24:12 -0600469int btrfs_recover_balance(struct btrfs_fs_info *fs_info);
Ilya Dryomov837d5b62012-01-16 22:04:49 +0200470int btrfs_pause_balance(struct btrfs_fs_info *fs_info);
Ilya Dryomova7e99c62012-01-16 22:04:49 +0200471int btrfs_cancel_balance(struct btrfs_fs_info *fs_info);
Stefan Behrensf7a81ea2013-08-15 17:11:19 +0200472int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info);
Stefan Behrens70f80172013-08-15 17:11:23 +0200473int btrfs_check_uuid_tree(struct btrfs_fs_info *fs_info);
Yan Zheng2b820322008-11-17 21:11:30 -0500474int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset);
Jeff Mahoney499f3772015-06-15 09:41:17 -0400475int find_free_dev_extent_start(struct btrfs_transaction *transaction,
476 struct btrfs_device *device, u64 num_bytes,
477 u64 search_start, u64 *start, u64 *max_avail);
Josef Bacik6df9a952013-06-27 13:22:46 -0400478int find_free_dev_extent(struct btrfs_trans_handle *trans,
479 struct btrfs_device *device, u64 num_bytes,
Josef Bacikba1bf482009-09-11 16:11:19 -0400480 u64 *start, u64 *max_avail);
Stefan Behrens442a4f62012-05-25 16:06:08 +0200481void btrfs_dev_stat_inc_and_print(struct btrfs_device *dev, int index);
Stefan Behrensc11d2c22012-05-25 16:06:09 +0200482int btrfs_get_dev_stats(struct btrfs_root *root,
David Sterbab27f7c02012-06-22 06:30:39 -0600483 struct btrfs_ioctl_get_dev_stats *stats);
Miao Xiecb517ea2013-05-15 07:48:19 +0000484void btrfs_init_devices_late(struct btrfs_fs_info *fs_info);
Stefan Behrens733f4fb2012-05-25 16:06:10 +0200485int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info);
486int btrfs_run_dev_stats(struct btrfs_trans_handle *trans,
487 struct btrfs_fs_info *fs_info);
Qu Wenruo084b6e7c2014-10-30 16:52:31 +0800488void btrfs_rm_dev_replace_remove_srcdev(struct btrfs_fs_info *fs_info,
489 struct btrfs_device *srcdev);
490void btrfs_rm_dev_replace_free_srcdev(struct btrfs_fs_info *fs_info,
491 struct btrfs_device *srcdev);
Stefan Behrense93c89c2012-11-05 17:33:06 +0100492void btrfs_destroy_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,
493 struct btrfs_device *tgtdev);
494void btrfs_init_dev_replace_tgtdev_for_resume(struct btrfs_fs_info *fs_info,
495 struct btrfs_device *tgtdev);
Anand Jain12b1c262015-08-14 18:32:59 +0800496void btrfs_scratch_superblocks(struct block_device *bdev, char *device_path);
David Woodhouse53b381b2013-01-29 18:40:14 -0500497int btrfs_is_parity_mirror(struct btrfs_mapping_tree *map_tree,
498 u64 logical, u64 len, int mirror_num);
499unsigned long btrfs_full_stripe_len(struct btrfs_root *root,
500 struct btrfs_mapping_tree *map_tree,
501 u64 logical);
Josef Bacik6df9a952013-06-27 13:22:46 -0400502int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans,
503 struct btrfs_root *extent_root,
504 u64 chunk_offset, u64 chunk_size);
Josef Bacik47ab2a62014-09-18 11:20:02 -0400505int btrfs_remove_chunk(struct btrfs_trans_handle *trans,
506 struct btrfs_root *root, u64 chunk_offset);
Miao Xieaddc3fa2014-07-24 11:37:11 +0800507
508static inline int btrfs_dev_stats_dirty(struct btrfs_device *dev)
509{
510 return atomic_read(&dev->dev_stats_ccnt);
511}
512
Stefan Behrens442a4f62012-05-25 16:06:08 +0200513static inline void btrfs_dev_stat_inc(struct btrfs_device *dev,
514 int index)
515{
516 atomic_inc(dev->dev_stat_values + index);
Miao Xieaddc3fa2014-07-24 11:37:11 +0800517 smp_mb__before_atomic();
518 atomic_inc(&dev->dev_stats_ccnt);
Stefan Behrens442a4f62012-05-25 16:06:08 +0200519}
520
521static inline int btrfs_dev_stat_read(struct btrfs_device *dev,
522 int index)
523{
524 return atomic_read(dev->dev_stat_values + index);
525}
526
527static inline int btrfs_dev_stat_read_and_reset(struct btrfs_device *dev,
528 int index)
529{
530 int ret;
531
532 ret = atomic_xchg(dev->dev_stat_values + index, 0);
Miao Xieaddc3fa2014-07-24 11:37:11 +0800533 smp_mb__before_atomic();
534 atomic_inc(&dev->dev_stats_ccnt);
Stefan Behrens442a4f62012-05-25 16:06:08 +0200535 return ret;
536}
537
538static inline void btrfs_dev_stat_set(struct btrfs_device *dev,
539 int index, unsigned long val)
540{
541 atomic_set(dev->dev_stat_values + index, val);
Miao Xieaddc3fa2014-07-24 11:37:11 +0800542 smp_mb__before_atomic();
543 atomic_inc(&dev->dev_stats_ccnt);
Stefan Behrens442a4f62012-05-25 16:06:08 +0200544}
545
546static inline void btrfs_dev_stat_reset(struct btrfs_device *dev,
547 int index)
548{
549 btrfs_dev_stat_set(dev, index, 0);
550}
Miao Xie935e5cc2014-09-03 21:35:33 +0800551
552void btrfs_update_commit_device_size(struct btrfs_fs_info *fs_info);
Miao Xiece7213c2014-09-03 21:35:34 +0800553void btrfs_update_commit_device_bytes_used(struct btrfs_root *root,
554 struct btrfs_transaction *transaction);
Filipe Manana04216822014-11-27 21:14:15 +0000555
556static inline void lock_chunks(struct btrfs_root *root)
557{
558 mutex_lock(&root->fs_info->chunk_mutex);
559}
560
561static inline void unlock_chunks(struct btrfs_root *root)
562{
563 mutex_unlock(&root->fs_info->chunk_mutex);
564}
565
Anand Jainc73eccf2015-03-10 06:38:30 +0800566struct list_head *btrfs_get_fs_uuids(void);
Anand Jain5a13f432015-03-10 06:38:31 +0800567void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info);
568void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info);
Anand Jainf190aa42015-08-14 18:33:05 +0800569void btrfs_close_one_device(struct btrfs_device *device);
Filipe Manana04216822014-11-27 21:14:15 +0000570
Chris Mason0b86a832008-03-24 15:01:56 -0400571#endif