Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 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_ |
Chris Mason | 8790d50 | 2008-04-03 16:29:03 -0400 | [diff] [blame] | 21 | |
Chris Mason | cea9e44 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 22 | #include <linux/bio.h> |
Miao Xie | b2117a3 | 2011-01-05 10:07:28 +0000 | [diff] [blame] | 23 | #include <linux/sort.h> |
Filipe Brandenburger | 55e301f | 2013-01-29 06:04:50 +0000 | [diff] [blame] | 24 | #include <linux/btrfs.h> |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 25 | #include "async-thread.h" |
Chris Mason | cea9e44 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 26 | |
Miao Xie | b2117a3 | 2011-01-05 10:07:28 +0000 | [diff] [blame] | 27 | #define BTRFS_STRIPE_LEN (64 * 1024) |
| 28 | |
Chris Mason | f298446 | 2008-04-10 16:19:33 -0400 | [diff] [blame] | 29 | struct buffer_head; |
Chris Mason | ffbd517 | 2009-04-20 15:50:09 -0400 | [diff] [blame] | 30 | struct btrfs_pending_bios { |
| 31 | struct bio *head; |
| 32 | struct bio *tail; |
| 33 | }; |
| 34 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 35 | struct btrfs_device { |
| 36 | struct list_head dev_list; |
Chris Mason | b307571 | 2008-04-22 09:22:07 -0400 | [diff] [blame] | 37 | struct list_head dev_alloc_list; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 38 | struct btrfs_fs_devices *fs_devices; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 39 | struct btrfs_root *dev_root; |
Chris Mason | ffbd517 | 2009-04-20 15:50:09 -0400 | [diff] [blame] | 40 | |
| 41 | /* regular prio bios */ |
| 42 | struct btrfs_pending_bios pending_bios; |
| 43 | /* WRITE_SYNC bios */ |
| 44 | struct btrfs_pending_bios pending_sync_bios; |
| 45 | |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 46 | u64 generation; |
Dulshani Gunawardhana | 3c45bfc | 2013-10-31 09:57:33 +0530 | [diff] [blame] | 47 | int running_pending; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 48 | int writeable; |
Chris Mason | dfe2502 | 2008-05-13 13:46:40 -0400 | [diff] [blame] | 49 | int in_fs_metadata; |
Chris Mason | cd02dca | 2010-12-13 14:56:23 -0500 | [diff] [blame] | 50 | int missing; |
Josef Bacik | d5e2003 | 2011-08-04 14:52:27 +0000 | [diff] [blame] | 51 | int can_discard; |
Stefan Behrens | 63a212a | 2012-11-05 18:29:28 +0100 | [diff] [blame] | 52 | int is_tgtdev_for_dev_replace; |
Chris Mason | b307571 | 2008-04-22 09:22:07 -0400 | [diff] [blame] | 53 | |
Chris Mason | 8790d50 | 2008-04-03 16:29:03 -0400 | [diff] [blame] | 54 | spinlock_t io_lock; |
Dulshani Gunawardhana | 3c45bfc | 2013-10-31 09:57:33 +0530 | [diff] [blame] | 55 | /* the mode sent to blkdev_get */ |
| 56 | fmode_t mode; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 57 | |
| 58 | struct block_device *bdev; |
| 59 | |
Chris Mason | 15916de | 2008-11-19 21:17:22 -0500 | [diff] [blame] | 60 | |
Josef Bacik | 606686e | 2012-06-04 14:03:51 -0400 | [diff] [blame] | 61 | struct rcu_string *name; |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 62 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 63 | /* the internal btrfs device id */ |
| 64 | u64 devid; |
| 65 | |
| 66 | /* size of the device */ |
| 67 | u64 total_bytes; |
| 68 | |
Chris Ball | d6397ba | 2009-04-27 07:29:03 -0400 | [diff] [blame] | 69 | /* size of the disk */ |
| 70 | u64 disk_total_bytes; |
| 71 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 72 | /* bytes used */ |
| 73 | u64 bytes_used; |
| 74 | |
| 75 | /* optimal io alignment for this device */ |
| 76 | u32 io_align; |
| 77 | |
| 78 | /* optimal io width for this device */ |
| 79 | u32 io_width; |
Dulshani Gunawardhana | 3c45bfc | 2013-10-31 09:57:33 +0530 | [diff] [blame] | 80 | /* type and info about this device */ |
| 81 | u64 type; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 82 | |
| 83 | /* minimal io size for this device */ |
| 84 | u32 sector_size; |
| 85 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 86 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 87 | /* physical drive uuid (or lvm uuid) */ |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 88 | u8 uuid[BTRFS_UUID_SIZE]; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 89 | |
Dulshani Gunawardhana | 3c45bfc | 2013-10-31 09:57:33 +0530 | [diff] [blame] | 90 | /* for sending down flush barriers */ |
| 91 | int nobarriers; |
| 92 | struct bio *flush_bio; |
| 93 | struct completion flush_wait; |
| 94 | |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 95 | /* per-device scrub information */ |
Stefan Behrens | d9d181c | 2012-11-02 09:58:09 +0100 | [diff] [blame] | 96 | struct scrub_ctx *scrub_device; |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 97 | |
Qu Wenruo | d458b05 | 2014-02-28 10:46:19 +0800 | [diff] [blame] | 98 | struct btrfs_work work; |
Xiao Guangrong | 1f78160 | 2011-04-20 10:09:16 +0000 | [diff] [blame] | 99 | struct rcu_head rcu; |
| 100 | struct work_struct rcu_work; |
Arne Jansen | 90519d6 | 2011-05-23 14:30:00 +0200 | [diff] [blame] | 101 | |
| 102 | /* readahead state */ |
| 103 | spinlock_t reada_lock; |
| 104 | atomic_t reada_in_flight; |
| 105 | u64 reada_next; |
| 106 | struct reada_zone *reada_curr_zone; |
| 107 | struct radix_tree_root reada_zones; |
| 108 | struct radix_tree_root reada_extents; |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 109 | |
Chris Mason | 387125f | 2011-11-18 15:07:51 -0500 | [diff] [blame] | 110 | |
Stefan Behrens | 442a4f6 | 2012-05-25 16:06:08 +0200 | [diff] [blame] | 111 | /* disk I/O failure stats. For detailed description refer to |
| 112 | * enum btrfs_dev_stat_values in ioctl.h */ |
Stefan Behrens | 733f4fb | 2012-05-25 16:06:10 +0200 | [diff] [blame] | 113 | int dev_stats_valid; |
Stefan Behrens | 442a4f6 | 2012-05-25 16:06:08 +0200 | [diff] [blame] | 114 | int dev_stats_dirty; /* counters need to be written to disk */ |
| 115 | atomic_t dev_stat_values[BTRFS_DEV_STAT_VALUES_MAX]; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 116 | }; |
| 117 | |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 118 | struct btrfs_fs_devices { |
| 119 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
| 120 | |
Wu Fengguang | d4a7894 | 2009-04-02 16:46:06 -0400 | [diff] [blame] | 121 | /* the device with this id has the most recent copy of the super */ |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 122 | u64 latest_devid; |
| 123 | u64 latest_trans; |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 124 | u64 num_devices; |
Chris Mason | a0af469 | 2008-05-13 16:03:06 -0400 | [diff] [blame] | 125 | u64 open_devices; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 126 | u64 rw_devices; |
Chris Mason | cd02dca | 2010-12-13 14:56:23 -0500 | [diff] [blame] | 127 | u64 missing_devices; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 128 | u64 total_rw_bytes; |
Josef Bacik | d5e2003 | 2011-08-04 14:52:27 +0000 | [diff] [blame] | 129 | u64 num_can_discard; |
Josef Bacik | 02db084 | 2012-06-21 16:03:58 -0400 | [diff] [blame] | 130 | u64 total_devices; |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 131 | struct block_device *latest_bdev; |
Chris Mason | e5e9a52 | 2009-06-10 15:17:02 -0400 | [diff] [blame] | 132 | |
| 133 | /* all of the devices in the FS, protected by a mutex |
| 134 | * so we can safely walk it to write out the supers without |
Wang Shilong | 9b011ad | 2013-10-25 19:12:02 +0800 | [diff] [blame] | 135 | * worrying about add/remove by the multi-device code. |
| 136 | * Scrubbing super can kick off supers writing by holding |
| 137 | * this mutex lock. |
Chris Mason | e5e9a52 | 2009-06-10 15:17:02 -0400 | [diff] [blame] | 138 | */ |
| 139 | struct mutex device_list_mutex; |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 140 | struct list_head devices; |
Chris Mason | b307571 | 2008-04-22 09:22:07 -0400 | [diff] [blame] | 141 | |
| 142 | /* devices not currently being allocated */ |
| 143 | struct list_head alloc_list; |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 144 | struct list_head list; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 145 | |
| 146 | struct btrfs_fs_devices *seed; |
| 147 | int seeding; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 148 | |
| 149 | int opened; |
Chris Mason | c289811 | 2009-06-10 09:51:32 -0400 | [diff] [blame] | 150 | |
| 151 | /* set when we find or add a device that doesn't have the |
| 152 | * nonrot flag set |
| 153 | */ |
| 154 | int rotating; |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 155 | }; |
| 156 | |
Miao Xie | facc8a22 | 2013-07-25 19:22:34 +0800 | [diff] [blame] | 157 | #define BTRFS_BIO_INLINE_CSUM_SIZE 64 |
| 158 | |
Chris Mason | 9be3395 | 2013-05-17 18:30:14 -0400 | [diff] [blame] | 159 | /* |
| 160 | * we need the mirror number and stripe index to be passed around |
| 161 | * the call chain while we are processing end_io (especially errors). |
| 162 | * Really, what we need is a btrfs_bio structure that has this info |
| 163 | * and is properly sized with its stripe array, but we're not there |
| 164 | * quite yet. We have our own btrfs bioset, and all of the bios |
| 165 | * we allocate are actually btrfs_io_bios. We'll cram as much of |
| 166 | * struct btrfs_bio as we can into this over time. |
| 167 | */ |
Miao Xie | facc8a22 | 2013-07-25 19:22:34 +0800 | [diff] [blame] | 168 | typedef void (btrfs_io_bio_end_io_t) (struct btrfs_io_bio *bio, int err); |
Chris Mason | 9be3395 | 2013-05-17 18:30:14 -0400 | [diff] [blame] | 169 | struct btrfs_io_bio { |
| 170 | unsigned long mirror_num; |
| 171 | unsigned long stripe_index; |
Miao Xie | facc8a22 | 2013-07-25 19:22:34 +0800 | [diff] [blame] | 172 | u8 *csum; |
| 173 | u8 csum_inline[BTRFS_BIO_INLINE_CSUM_SIZE]; |
| 174 | u8 *csum_allocated; |
| 175 | btrfs_io_bio_end_io_t *end_io; |
Chris Mason | 9be3395 | 2013-05-17 18:30:14 -0400 | [diff] [blame] | 176 | struct bio bio; |
| 177 | }; |
| 178 | |
| 179 | static inline struct btrfs_io_bio *btrfs_io_bio(struct bio *bio) |
| 180 | { |
| 181 | return container_of(bio, struct btrfs_io_bio, bio); |
| 182 | } |
| 183 | |
Chris Mason | cea9e44 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 184 | struct btrfs_bio_stripe { |
| 185 | struct btrfs_device *dev; |
| 186 | u64 physical; |
Li Dongyang | fce3bb9 | 2011-03-24 10:24:26 +0000 | [diff] [blame] | 187 | u64 length; /* only used for discard mappings */ |
Chris Mason | cea9e44 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 188 | }; |
| 189 | |
Jan Schmidt | a1d3c47 | 2011-08-04 17:15:33 +0200 | [diff] [blame] | 190 | struct btrfs_bio; |
| 191 | typedef void (btrfs_bio_end_io_t) (struct btrfs_bio *bio, int err); |
| 192 | |
| 193 | struct btrfs_bio { |
Chris Mason | cea9e44 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 194 | atomic_t stripes_pending; |
Miao Xie | c404e0d | 2014-01-30 16:46:55 +0800 | [diff] [blame] | 195 | struct btrfs_fs_info *fs_info; |
Chris Mason | cea9e44 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 196 | bio_end_io_t *end_io; |
Chris Mason | 7d2b4da | 2008-08-05 10:13:57 -0400 | [diff] [blame] | 197 | struct bio *orig_bio; |
Chris Mason | cea9e44 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 198 | void *private; |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 199 | atomic_t error; |
| 200 | int max_errors; |
Chris Mason | cea9e44 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 201 | int num_stripes; |
Jan Schmidt | a1d3c47 | 2011-08-04 17:15:33 +0200 | [diff] [blame] | 202 | int mirror_num; |
Chris Mason | cea9e44 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 203 | struct btrfs_bio_stripe stripes[]; |
| 204 | }; |
| 205 | |
Miao Xie | b2117a3 | 2011-01-05 10:07:28 +0000 | [diff] [blame] | 206 | struct btrfs_device_info { |
| 207 | struct btrfs_device *dev; |
| 208 | u64 dev_offset; |
| 209 | u64 max_avail; |
Arne Jansen | 73c5de0 | 2011-04-12 12:07:57 +0200 | [diff] [blame] | 210 | u64 total_avail; |
Miao Xie | b2117a3 | 2011-01-05 10:07:28 +0000 | [diff] [blame] | 211 | }; |
| 212 | |
Liu Bo | 31e5022 | 2012-11-21 14:18:10 +0000 | [diff] [blame] | 213 | struct btrfs_raid_attr { |
| 214 | int sub_stripes; /* sub_stripes info for map */ |
| 215 | int dev_stripes; /* stripes per dev */ |
| 216 | int devs_max; /* max devs to use */ |
| 217 | int devs_min; /* min devs needed */ |
| 218 | int devs_increment; /* ndevs has to be a multiple of this */ |
| 219 | int ncopies; /* how many copies to data has */ |
| 220 | }; |
| 221 | |
liubo | 1abe9b8 | 2011-03-24 11:18:59 +0000 | [diff] [blame] | 222 | struct map_lookup { |
| 223 | u64 type; |
| 224 | int io_align; |
| 225 | int io_width; |
| 226 | int stripe_len; |
| 227 | int sector_size; |
| 228 | int num_stripes; |
| 229 | int sub_stripes; |
| 230 | struct btrfs_bio_stripe stripes[]; |
| 231 | }; |
| 232 | |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 233 | #define map_lookup_size(n) (sizeof(struct map_lookup) + \ |
| 234 | (sizeof(struct btrfs_bio_stripe) * (n))) |
| 235 | |
Ilya Dryomov | f43ffb6 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 236 | /* |
| 237 | * Restriper's general type filter |
| 238 | */ |
| 239 | #define BTRFS_BALANCE_DATA (1ULL << 0) |
| 240 | #define BTRFS_BALANCE_SYSTEM (1ULL << 1) |
| 241 | #define BTRFS_BALANCE_METADATA (1ULL << 2) |
| 242 | |
| 243 | #define BTRFS_BALANCE_TYPE_MASK (BTRFS_BALANCE_DATA | \ |
| 244 | BTRFS_BALANCE_SYSTEM | \ |
| 245 | BTRFS_BALANCE_METADATA) |
Ilya Dryomov | e4d8ec0 | 2012-01-16 22:04:48 +0200 | [diff] [blame] | 246 | |
| 247 | #define BTRFS_BALANCE_FORCE (1ULL << 3) |
Ilya Dryomov | 5964101 | 2012-01-16 22:04:48 +0200 | [diff] [blame] | 248 | #define BTRFS_BALANCE_RESUME (1ULL << 4) |
Ilya Dryomov | e4d8ec0 | 2012-01-16 22:04:48 +0200 | [diff] [blame] | 249 | |
Ilya Dryomov | ed25e9b | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 250 | /* |
| 251 | * Balance filters |
| 252 | */ |
| 253 | #define BTRFS_BALANCE_ARGS_PROFILES (1ULL << 0) |
Ilya Dryomov | 5ce5b3c | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 254 | #define BTRFS_BALANCE_ARGS_USAGE (1ULL << 1) |
Ilya Dryomov | 409d404 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 255 | #define BTRFS_BALANCE_ARGS_DEVID (1ULL << 2) |
Ilya Dryomov | 94e60d5 | 2012-01-16 22:04:48 +0200 | [diff] [blame] | 256 | #define BTRFS_BALANCE_ARGS_DRANGE (1ULL << 3) |
Ilya Dryomov | ea67176 | 2012-01-16 22:04:48 +0200 | [diff] [blame] | 257 | #define BTRFS_BALANCE_ARGS_VRANGE (1ULL << 4) |
David Sterba | 7d824b6 | 2014-05-07 17:37:51 +0200 | [diff] [blame^] | 258 | #define BTRFS_BALANCE_ARGS_LIMIT (1ULL << 5) |
Ilya Dryomov | f43ffb6 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 259 | |
Ilya Dryomov | cfa4c96 | 2012-01-16 22:04:48 +0200 | [diff] [blame] | 260 | /* |
| 261 | * Profile changing flags. When SOFT is set we won't relocate chunk if |
| 262 | * it already has the target profile (even though it may be |
| 263 | * half-filled). |
| 264 | */ |
Ilya Dryomov | e4d8ec0 | 2012-01-16 22:04:48 +0200 | [diff] [blame] | 265 | #define BTRFS_BALANCE_ARGS_CONVERT (1ULL << 8) |
Ilya Dryomov | cfa4c96 | 2012-01-16 22:04:48 +0200 | [diff] [blame] | 266 | #define BTRFS_BALANCE_ARGS_SOFT (1ULL << 9) |
Ilya Dryomov | e4d8ec0 | 2012-01-16 22:04:48 +0200 | [diff] [blame] | 267 | |
Ilya Dryomov | c9e9f97 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 268 | struct btrfs_balance_args; |
Ilya Dryomov | 19a39dc | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 269 | struct btrfs_balance_progress; |
Ilya Dryomov | c9e9f97 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 270 | struct btrfs_balance_control { |
| 271 | struct btrfs_fs_info *fs_info; |
| 272 | |
| 273 | struct btrfs_balance_args data; |
| 274 | struct btrfs_balance_args meta; |
| 275 | struct btrfs_balance_args sys; |
| 276 | |
| 277 | u64 flags; |
Ilya Dryomov | 19a39dc | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 278 | |
| 279 | struct btrfs_balance_progress stat; |
Ilya Dryomov | c9e9f97 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 280 | }; |
| 281 | |
Miao Xie | 6d07bce | 2011-01-05 10:07:31 +0000 | [diff] [blame] | 282 | int btrfs_account_dev_extents_size(struct btrfs_device *device, u64 start, |
| 283 | u64 end, u64 *length); |
| 284 | |
Jan Schmidt | a1d3c47 | 2011-08-04 17:15:33 +0200 | [diff] [blame] | 285 | #define btrfs_bio_size(n) (sizeof(struct btrfs_bio) + \ |
Chris Mason | cea9e44 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 286 | (sizeof(struct btrfs_bio_stripe) * (n))) |
| 287 | |
Stefan Behrens | 3ec706c | 2012-11-05 15:46:42 +0100 | [diff] [blame] | 288 | int btrfs_map_block(struct btrfs_fs_info *fs_info, int rw, |
Chris Mason | cea9e44 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 289 | u64 logical, u64 *length, |
Jan Schmidt | a1d3c47 | 2011-08-04 17:15:33 +0200 | [diff] [blame] | 290 | struct btrfs_bio **bbio_ret, int mirror_num); |
Yan Zheng | a512bbf | 2008-12-08 16:46:26 -0500 | [diff] [blame] | 291 | int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree, |
| 292 | u64 chunk_start, u64 physical, u64 devid, |
| 293 | u64 **logical, int *naddrs, int *stripe_len); |
Yan Zheng | e4404d6 | 2008-12-12 10:03:26 -0500 | [diff] [blame] | 294 | int btrfs_read_sys_array(struct btrfs_root *root); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 295 | int btrfs_read_chunk_tree(struct btrfs_root *root); |
| 296 | int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 297 | struct btrfs_root *extent_root, u64 type); |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 298 | void btrfs_mapping_init(struct btrfs_mapping_tree *tree); |
| 299 | void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree); |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 300 | int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio, |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 301 | int mirror_num, int async_submit); |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 302 | int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, |
Christoph Hellwig | 97288f2 | 2008-12-02 06:36:09 -0500 | [diff] [blame] | 303 | fmode_t flags, void *holder); |
| 304 | int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder, |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 305 | struct btrfs_fs_devices **fs_devices_ret); |
| 306 | int btrfs_close_devices(struct btrfs_fs_devices *fs_devices); |
Stefan Behrens | 8dabb74 | 2012-11-06 13:15:27 +0100 | [diff] [blame] | 307 | void btrfs_close_extra_devices(struct btrfs_fs_info *fs_info, |
| 308 | struct btrfs_fs_devices *fs_devices, int step); |
Stefan Behrens | 7ba15b7 | 2012-11-05 14:42:30 +0100 | [diff] [blame] | 309 | int btrfs_find_device_missing_or_by_path(struct btrfs_root *root, |
| 310 | char *device_path, |
| 311 | struct btrfs_device **device); |
Ilya Dryomov | 12bd2fc | 2013-08-23 13:20:17 +0300 | [diff] [blame] | 312 | struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info, |
| 313 | const u64 *devid, |
| 314 | const u8 *uuid); |
Chris Mason | a061fc8 | 2008-05-07 11:43:44 -0400 | [diff] [blame] | 315 | int btrfs_rm_device(struct btrfs_root *root, char *device_path); |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 316 | void btrfs_cleanup_fs_uuids(void); |
Stefan Behrens | 5d96405 | 2012-11-05 14:59:07 +0100 | [diff] [blame] | 317 | int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len); |
Chris Mason | 8f18cf1 | 2008-04-25 16:53:30 -0400 | [diff] [blame] | 318 | int btrfs_grow_device(struct btrfs_trans_handle *trans, |
| 319 | struct btrfs_device *device, u64 new_size); |
Stefan Behrens | aa1b8cd | 2012-11-05 17:03:39 +0100 | [diff] [blame] | 320 | struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid, |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 321 | u8 *uuid, u8 *fsid); |
Chris Mason | 8f18cf1 | 2008-04-25 16:53:30 -0400 | [diff] [blame] | 322 | int btrfs_shrink_device(struct btrfs_device *device, u64 new_size); |
Chris Mason | 788f20e | 2008-04-28 15:29:42 -0400 | [diff] [blame] | 323 | int btrfs_init_new_device(struct btrfs_root *root, char *path); |
Stefan Behrens | e93c89c | 2012-11-05 17:33:06 +0100 | [diff] [blame] | 324 | int btrfs_init_dev_replace_tgtdev(struct btrfs_root *root, char *device_path, |
| 325 | struct btrfs_device **device_out); |
Ilya Dryomov | c9e9f97 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 326 | int btrfs_balance(struct btrfs_balance_control *bctl, |
| 327 | struct btrfs_ioctl_balance_args *bargs); |
Ilya Dryomov | 2b6ba62 | 2012-06-22 12:24:13 -0600 | [diff] [blame] | 328 | int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info); |
Ilya Dryomov | 68310a5 | 2012-06-22 12:24:12 -0600 | [diff] [blame] | 329 | int btrfs_recover_balance(struct btrfs_fs_info *fs_info); |
Ilya Dryomov | 837d5b6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 330 | int btrfs_pause_balance(struct btrfs_fs_info *fs_info); |
Ilya Dryomov | a7e99c6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 331 | int btrfs_cancel_balance(struct btrfs_fs_info *fs_info); |
Stefan Behrens | f7a81ea | 2013-08-15 17:11:19 +0200 | [diff] [blame] | 332 | int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info); |
Stefan Behrens | 70f8017 | 2013-08-15 17:11:23 +0200 | [diff] [blame] | 333 | int btrfs_check_uuid_tree(struct btrfs_fs_info *fs_info); |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 334 | int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset); |
Josef Bacik | 6df9a95 | 2013-06-27 13:22:46 -0400 | [diff] [blame] | 335 | int find_free_dev_extent(struct btrfs_trans_handle *trans, |
| 336 | struct btrfs_device *device, u64 num_bytes, |
Josef Bacik | ba1bf48 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 337 | u64 *start, u64 *max_avail); |
Stefan Behrens | 442a4f6 | 2012-05-25 16:06:08 +0200 | [diff] [blame] | 338 | void btrfs_dev_stat_inc_and_print(struct btrfs_device *dev, int index); |
Stefan Behrens | c11d2c2 | 2012-05-25 16:06:09 +0200 | [diff] [blame] | 339 | int btrfs_get_dev_stats(struct btrfs_root *root, |
David Sterba | b27f7c0 | 2012-06-22 06:30:39 -0600 | [diff] [blame] | 340 | struct btrfs_ioctl_get_dev_stats *stats); |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 341 | void btrfs_init_devices_late(struct btrfs_fs_info *fs_info); |
Stefan Behrens | 733f4fb | 2012-05-25 16:06:10 +0200 | [diff] [blame] | 342 | int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info); |
| 343 | int btrfs_run_dev_stats(struct btrfs_trans_handle *trans, |
| 344 | struct btrfs_fs_info *fs_info); |
Stefan Behrens | e93c89c | 2012-11-05 17:33:06 +0100 | [diff] [blame] | 345 | void btrfs_rm_dev_replace_srcdev(struct btrfs_fs_info *fs_info, |
| 346 | struct btrfs_device *srcdev); |
| 347 | void btrfs_destroy_dev_replace_tgtdev(struct btrfs_fs_info *fs_info, |
| 348 | struct btrfs_device *tgtdev); |
| 349 | void btrfs_init_dev_replace_tgtdev_for_resume(struct btrfs_fs_info *fs_info, |
| 350 | struct btrfs_device *tgtdev); |
Stefan Behrens | a8a6dab | 2012-11-05 15:50:14 +0100 | [diff] [blame] | 351 | int btrfs_scratch_superblock(struct btrfs_device *device); |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 352 | int btrfs_is_parity_mirror(struct btrfs_mapping_tree *map_tree, |
| 353 | u64 logical, u64 len, int mirror_num); |
| 354 | unsigned long btrfs_full_stripe_len(struct btrfs_root *root, |
| 355 | struct btrfs_mapping_tree *map_tree, |
| 356 | u64 logical); |
Josef Bacik | 6df9a95 | 2013-06-27 13:22:46 -0400 | [diff] [blame] | 357 | int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans, |
| 358 | struct btrfs_root *extent_root, |
| 359 | u64 chunk_offset, u64 chunk_size); |
Stefan Behrens | 442a4f6 | 2012-05-25 16:06:08 +0200 | [diff] [blame] | 360 | static inline void btrfs_dev_stat_inc(struct btrfs_device *dev, |
| 361 | int index) |
| 362 | { |
| 363 | atomic_inc(dev->dev_stat_values + index); |
| 364 | dev->dev_stats_dirty = 1; |
| 365 | } |
| 366 | |
| 367 | static inline int btrfs_dev_stat_read(struct btrfs_device *dev, |
| 368 | int index) |
| 369 | { |
| 370 | return atomic_read(dev->dev_stat_values + index); |
| 371 | } |
| 372 | |
| 373 | static inline int btrfs_dev_stat_read_and_reset(struct btrfs_device *dev, |
| 374 | int index) |
| 375 | { |
| 376 | int ret; |
| 377 | |
| 378 | ret = atomic_xchg(dev->dev_stat_values + index, 0); |
| 379 | dev->dev_stats_dirty = 1; |
| 380 | return ret; |
| 381 | } |
| 382 | |
| 383 | static inline void btrfs_dev_stat_set(struct btrfs_device *dev, |
| 384 | int index, unsigned long val) |
| 385 | { |
| 386 | atomic_set(dev->dev_stat_values + index, val); |
| 387 | dev->dev_stats_dirty = 1; |
| 388 | } |
| 389 | |
| 390 | static inline void btrfs_dev_stat_reset(struct btrfs_device *dev, |
| 391 | int index) |
| 392 | { |
| 393 | btrfs_dev_stat_set(dev, index, 0); |
| 394 | } |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 395 | #endif |