David Sterba | 9888c34 | 2018-04-03 19:16:55 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (C) 2007 Oracle. All rights reserved. |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 4 | */ |
| 5 | |
David Sterba | 9888c34 | 2018-04-03 19:16:55 +0200 | [diff] [blame] | 6 | #ifndef BTRFS_VOLUMES_H |
| 7 | #define BTRFS_VOLUMES_H |
Chris Mason | 8790d50 | 2008-04-03 16:29:03 -0400 | [diff] [blame] | 8 | |
Chris Mason | cea9e44 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 9 | #include <linux/bio.h> |
Miao Xie | b2117a3 | 2011-01-05 10:07:28 +0000 | [diff] [blame] | 10 | #include <linux/sort.h> |
Filipe Brandenburger | 55e301f | 2013-01-29 06:04:50 +0000 | [diff] [blame] | 11 | #include <linux/btrfs.h> |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 12 | #include "async-thread.h" |
Chris Mason | cea9e44 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 13 | |
Qu Wenruo | fce466e | 2018-07-03 17:10:05 +0800 | [diff] [blame] | 14 | #define BTRFS_MAX_DATA_CHUNK_SIZE (10ULL * SZ_1G) |
| 15 | |
Miao Xie | 67a2c45 | 2014-09-03 21:35:43 +0800 | [diff] [blame] | 16 | extern struct mutex uuid_mutex; |
| 17 | |
Byongho Lee | ee22184 | 2015-12-15 01:42:10 +0900 | [diff] [blame] | 18 | #define BTRFS_STRIPE_LEN SZ_64K |
Miao Xie | b2117a3 | 2011-01-05 10:07:28 +0000 | [diff] [blame] | 19 | |
Qu Wenruo | 719fae8 | 2022-04-20 16:08:28 +0800 | [diff] [blame] | 20 | /* Used by sanity check for btrfs_raid_types. */ |
| 21 | #define const_ffs(n) (__builtin_ctzll(n) + 1) |
| 22 | |
| 23 | /* |
| 24 | * The conversion from BTRFS_BLOCK_GROUP_* bits to btrfs_raid_type requires |
| 25 | * RAID0 always to be the lowest profile bit. |
| 26 | * Although it's part of on-disk format and should never change, do extra |
| 27 | * compile-time sanity checks. |
| 28 | */ |
| 29 | static_assert(const_ffs(BTRFS_BLOCK_GROUP_RAID0) < |
| 30 | const_ffs(BTRFS_BLOCK_GROUP_PROFILE_MASK & ~BTRFS_BLOCK_GROUP_RAID0)); |
| 31 | static_assert(const_ilog2(BTRFS_BLOCK_GROUP_RAID0) > |
| 32 | ilog2(BTRFS_BLOCK_GROUP_TYPE_MASK)); |
| 33 | |
| 34 | /* ilog2() can handle both constants and variables */ |
| 35 | #define BTRFS_BG_FLAG_TO_INDEX(profile) \ |
| 36 | ilog2((profile) >> (ilog2(BTRFS_BLOCK_GROUP_RAID0) - 1)) |
| 37 | |
Qu Wenruo | f04fbcc | 2022-04-20 16:08:27 +0800 | [diff] [blame] | 38 | enum btrfs_raid_types { |
Qu Wenruo | 719fae8 | 2022-04-20 16:08:28 +0800 | [diff] [blame] | 39 | /* SINGLE is the special one as it doesn't have on-disk bit. */ |
| 40 | BTRFS_RAID_SINGLE = 0, |
| 41 | |
| 42 | BTRFS_RAID_RAID0 = BTRFS_BG_FLAG_TO_INDEX(BTRFS_BLOCK_GROUP_RAID0), |
| 43 | BTRFS_RAID_RAID1 = BTRFS_BG_FLAG_TO_INDEX(BTRFS_BLOCK_GROUP_RAID1), |
| 44 | BTRFS_RAID_DUP = BTRFS_BG_FLAG_TO_INDEX(BTRFS_BLOCK_GROUP_DUP), |
| 45 | BTRFS_RAID_RAID10 = BTRFS_BG_FLAG_TO_INDEX(BTRFS_BLOCK_GROUP_RAID10), |
| 46 | BTRFS_RAID_RAID5 = BTRFS_BG_FLAG_TO_INDEX(BTRFS_BLOCK_GROUP_RAID5), |
| 47 | BTRFS_RAID_RAID6 = BTRFS_BG_FLAG_TO_INDEX(BTRFS_BLOCK_GROUP_RAID6), |
| 48 | BTRFS_RAID_RAID1C3 = BTRFS_BG_FLAG_TO_INDEX(BTRFS_BLOCK_GROUP_RAID1C3), |
| 49 | BTRFS_RAID_RAID1C4 = BTRFS_BG_FLAG_TO_INDEX(BTRFS_BLOCK_GROUP_RAID1C4), |
| 50 | |
Qu Wenruo | f04fbcc | 2022-04-20 16:08:27 +0800 | [diff] [blame] | 51 | BTRFS_NR_RAID_TYPES |
| 52 | }; |
| 53 | |
Nikolay Borisov | 5f14112 | 2019-06-03 12:05:03 +0300 | [diff] [blame] | 54 | struct btrfs_io_geometry { |
| 55 | /* remaining bytes before crossing a stripe */ |
| 56 | u64 len; |
| 57 | /* offset of logical address in chunk */ |
| 58 | u64 offset; |
| 59 | /* length of single IO stripe */ |
Qu Wenruo | cc353a8 | 2022-04-12 17:32:51 +0800 | [diff] [blame] | 60 | u32 stripe_len; |
| 61 | /* offset of address in stripe */ |
| 62 | u32 stripe_offset; |
Nikolay Borisov | 5f14112 | 2019-06-03 12:05:03 +0300 | [diff] [blame] | 63 | /* number of stripe where address falls */ |
| 64 | u64 stripe_nr; |
Nikolay Borisov | 5f14112 | 2019-06-03 12:05:03 +0300 | [diff] [blame] | 65 | /* offset of raid56 stripe into the chunk */ |
| 66 | u64 raid56_stripe_offset; |
| 67 | }; |
| 68 | |
Miao Xie | 7cc8e58 | 2014-09-03 21:35:38 +0800 | [diff] [blame] | 69 | /* |
| 70 | * Use sequence counter to get consistent device stat data on |
| 71 | * 32-bit processors. |
| 72 | */ |
| 73 | #if BITS_PER_LONG==32 && defined(CONFIG_SMP) |
| 74 | #include <linux/seqlock.h> |
| 75 | #define __BTRFS_NEED_DEVICE_DATA_ORDERED |
Su Yue | c41ec45 | 2021-01-21 19:39:10 +0800 | [diff] [blame] | 76 | #define btrfs_device_data_ordered_init(device) \ |
| 77 | seqcount_init(&device->data_seqcount) |
Miao Xie | 7cc8e58 | 2014-09-03 21:35:38 +0800 | [diff] [blame] | 78 | #else |
Su Yue | c41ec45 | 2021-01-21 19:39:10 +0800 | [diff] [blame] | 79 | #define btrfs_device_data_ordered_init(device) do { } while (0) |
Miao Xie | 7cc8e58 | 2014-09-03 21:35:38 +0800 | [diff] [blame] | 80 | #endif |
| 81 | |
Anand Jain | ebbede4 | 2017-12-04 12:54:52 +0800 | [diff] [blame] | 82 | #define BTRFS_DEV_STATE_WRITEABLE (0) |
Anand Jain | e12c962 | 2017-12-04 12:54:53 +0800 | [diff] [blame] | 83 | #define BTRFS_DEV_STATE_IN_FS_METADATA (1) |
Anand Jain | e6e674b | 2017-12-04 12:54:54 +0800 | [diff] [blame] | 84 | #define BTRFS_DEV_STATE_MISSING (2) |
Anand Jain | 401e29c | 2017-12-04 12:54:55 +0800 | [diff] [blame] | 85 | #define BTRFS_DEV_STATE_REPLACE_TGT (3) |
Anand Jain | 1c3063b | 2017-12-04 12:54:56 +0800 | [diff] [blame] | 86 | #define BTRFS_DEV_STATE_FLUSH_SENT (4) |
Filipe Manana | 66d204a1 | 2020-10-12 11:55:24 +0100 | [diff] [blame] | 87 | #define BTRFS_DEV_STATE_NO_READA (5) |
Anand Jain | ebbede4 | 2017-12-04 12:54:52 +0800 | [diff] [blame] | 88 | |
Naohiro Aota | 5b31646 | 2020-11-10 20:26:07 +0900 | [diff] [blame] | 89 | struct btrfs_zoned_device_info; |
| 90 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 91 | struct btrfs_device { |
Nikolay Borisov | 0b6f5d4 | 2019-05-09 18:11:11 +0300 | [diff] [blame] | 92 | struct list_head dev_list; /* device_list_mutex */ |
| 93 | struct list_head dev_alloc_list; /* chunk mutex */ |
Nikolay Borisov | bbbf724 | 2019-03-25 14:31:22 +0200 | [diff] [blame] | 94 | struct list_head post_commit_list; /* chunk mutex */ |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 95 | struct btrfs_fs_devices *fs_devices; |
Jeff Mahoney | fb45625 | 2016-06-22 18:54:56 -0400 | [diff] [blame] | 96 | struct btrfs_fs_info *fs_info; |
Chris Mason | ffbd517 | 2009-04-20 15:50:09 -0400 | [diff] [blame] | 97 | |
Madhuparna Bhowmik | 8d1a7aa | 2019-12-05 01:49:01 +0530 | [diff] [blame] | 98 | struct rcu_string __rcu *name; |
Miao Xie | d5ee37b | 2014-07-24 11:37:10 +0800 | [diff] [blame] | 99 | |
| 100 | u64 generation; |
| 101 | |
Miao Xie | d5ee37b | 2014-07-24 11:37:10 +0800 | [diff] [blame] | 102 | struct block_device *bdev; |
| 103 | |
Naohiro Aota | 5b31646 | 2020-11-10 20:26:07 +0900 | [diff] [blame] | 104 | struct btrfs_zoned_device_info *zone_info; |
| 105 | |
Miao Xie | d5ee37b | 2014-07-24 11:37:10 +0800 | [diff] [blame] | 106 | /* the mode sent to blkdev_get */ |
| 107 | fmode_t mode; |
| 108 | |
Anand Jain | 4889bc0 | 2022-01-12 13:06:01 +0800 | [diff] [blame] | 109 | /* |
| 110 | * Device's major-minor number. Must be set even if the device is not |
| 111 | * opened (bdev == NULL), unless the device is missing. |
| 112 | */ |
| 113 | dev_t devt; |
Anand Jain | ebbede4 | 2017-12-04 12:54:52 +0800 | [diff] [blame] | 114 | unsigned long dev_state; |
Omar Sandoval | 58efbc9 | 2017-08-22 23:45:59 -0700 | [diff] [blame] | 115 | blk_status_t last_flush_error; |
Chris Mason | b307571 | 2008-04-22 09:22:07 -0400 | [diff] [blame] | 116 | |
Miao Xie | 7cc8e58 | 2014-09-03 21:35:38 +0800 | [diff] [blame] | 117 | #ifdef __BTRFS_NEED_DEVICE_DATA_ORDERED |
Su Yue | c41ec45 | 2021-01-21 19:39:10 +0800 | [diff] [blame] | 118 | seqcount_t data_seqcount; |
Miao Xie | 7cc8e58 | 2014-09-03 21:35:38 +0800 | [diff] [blame] | 119 | #endif |
| 120 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 121 | /* the internal btrfs device id */ |
| 122 | u64 devid; |
| 123 | |
Miao Xie | 6ba40b6 | 2014-07-24 11:37:12 +0800 | [diff] [blame] | 124 | /* size of the device in memory */ |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 125 | u64 total_bytes; |
| 126 | |
Miao Xie | 6ba40b6 | 2014-07-24 11:37:12 +0800 | [diff] [blame] | 127 | /* size of the device on disk */ |
Chris Ball | d6397ba | 2009-04-27 07:29:03 -0400 | [diff] [blame] | 128 | u64 disk_total_bytes; |
| 129 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 130 | /* bytes used */ |
| 131 | u64 bytes_used; |
| 132 | |
| 133 | /* optimal io alignment for this device */ |
| 134 | u32 io_align; |
| 135 | |
| 136 | /* optimal io width for this device */ |
| 137 | u32 io_width; |
Dulshani Gunawardhana | 3c45bfc | 2013-10-31 09:57:33 +0530 | [diff] [blame] | 138 | /* type and info about this device */ |
| 139 | u64 type; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 140 | |
| 141 | /* minimal io size for this device */ |
| 142 | u32 sector_size; |
| 143 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 144 | /* physical drive uuid (or lvm uuid) */ |
Chris Mason | e17cade | 2008-04-15 15:41:47 -0400 | [diff] [blame] | 145 | u8 uuid[BTRFS_UUID_SIZE]; |
Chris Mason | 8b71284 | 2008-06-11 16:50:36 -0400 | [diff] [blame] | 146 | |
Miao Xie | 935e5cc | 2014-09-03 21:35:33 +0800 | [diff] [blame] | 147 | /* |
| 148 | * size of the device on the current transaction |
| 149 | * |
| 150 | * This variant is update when committing the transaction, |
Nikolay Borisov | bbbf724 | 2019-03-25 14:31:22 +0200 | [diff] [blame] | 151 | * and protected by chunk mutex |
Miao Xie | 935e5cc | 2014-09-03 21:35:33 +0800 | [diff] [blame] | 152 | */ |
| 153 | u64 commit_total_bytes; |
| 154 | |
Miao Xie | ce7213c | 2014-09-03 21:35:34 +0800 | [diff] [blame] | 155 | /* bytes used on the current transaction */ |
| 156 | u64 commit_bytes_used; |
Miao Xie | 935e5cc | 2014-09-03 21:35:33 +0800 | [diff] [blame] | 157 | |
Christoph Hellwig | f9e69aa | 2022-04-06 08:12:24 +0200 | [diff] [blame] | 158 | /* Bio used for flushing device barriers */ |
| 159 | struct bio flush_bio; |
Dulshani Gunawardhana | 3c45bfc | 2013-10-31 09:57:33 +0530 | [diff] [blame] | 160 | struct completion flush_wait; |
| 161 | |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 162 | /* per-device scrub information */ |
Anand Jain | cadbc0a | 2018-01-03 16:08:30 +0800 | [diff] [blame] | 163 | struct scrub_ctx *scrub_ctx; |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 164 | |
Stefan Behrens | 442a4f6 | 2012-05-25 16:06:08 +0200 | [diff] [blame] | 165 | /* disk I/O failure stats. For detailed description refer to |
| 166 | * enum btrfs_dev_stat_values in ioctl.h */ |
Stefan Behrens | 733f4fb | 2012-05-25 16:06:10 +0200 | [diff] [blame] | 167 | int dev_stats_valid; |
Miao Xie | addc3fa | 2014-07-24 11:37:11 +0800 | [diff] [blame] | 168 | |
| 169 | /* Counter to record the change of device stats */ |
| 170 | atomic_t dev_stats_ccnt; |
Stefan Behrens | 442a4f6 | 2012-05-25 16:06:08 +0200 | [diff] [blame] | 171 | atomic_t dev_stat_values[BTRFS_DEV_STAT_VALUES_MAX]; |
Jeff Mahoney | 1c11b63 | 2019-03-27 14:24:12 +0200 | [diff] [blame] | 172 | |
| 173 | struct extent_io_tree alloc_state; |
Anand Jain | 668e48af | 2020-01-06 19:38:31 +0800 | [diff] [blame] | 174 | |
| 175 | struct completion kobj_unregister; |
| 176 | /* For sysfs/FSID/devinfo/devid/ */ |
| 177 | struct kobject devid_kobj; |
David Sterba | eb3b505 | 2019-10-09 13:58:13 +0200 | [diff] [blame] | 178 | |
| 179 | /* Bandwidth limit for scrub, in bytes */ |
| 180 | u64 scrub_speed_max; |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 181 | }; |
| 182 | |
Miao Xie | 7cc8e58 | 2014-09-03 21:35:38 +0800 | [diff] [blame] | 183 | /* |
| 184 | * If we read those variants at the context of their own lock, we needn't |
| 185 | * use the following helpers, reading them directly is safe. |
| 186 | */ |
| 187 | #if BITS_PER_LONG==32 && defined(CONFIG_SMP) |
| 188 | #define BTRFS_DEVICE_GETSET_FUNCS(name) \ |
| 189 | static inline u64 \ |
| 190 | btrfs_device_get_##name(const struct btrfs_device *dev) \ |
| 191 | { \ |
| 192 | u64 size; \ |
| 193 | unsigned int seq; \ |
| 194 | \ |
| 195 | do { \ |
| 196 | seq = read_seqcount_begin(&dev->data_seqcount); \ |
| 197 | size = dev->name; \ |
| 198 | } while (read_seqcount_retry(&dev->data_seqcount, seq)); \ |
| 199 | return size; \ |
| 200 | } \ |
| 201 | \ |
| 202 | static inline void \ |
| 203 | btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ |
| 204 | { \ |
Su Yue | c41ec45 | 2021-01-21 19:39:10 +0800 | [diff] [blame] | 205 | preempt_disable(); \ |
Miao Xie | 7cc8e58 | 2014-09-03 21:35:38 +0800 | [diff] [blame] | 206 | write_seqcount_begin(&dev->data_seqcount); \ |
| 207 | dev->name = size; \ |
| 208 | write_seqcount_end(&dev->data_seqcount); \ |
Su Yue | c41ec45 | 2021-01-21 19:39:10 +0800 | [diff] [blame] | 209 | preempt_enable(); \ |
Miao Xie | 7cc8e58 | 2014-09-03 21:35:38 +0800 | [diff] [blame] | 210 | } |
Thomas Gleixner | 9454587 | 2019-10-15 21:18:11 +0200 | [diff] [blame] | 211 | #elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPTION) |
Miao Xie | 7cc8e58 | 2014-09-03 21:35:38 +0800 | [diff] [blame] | 212 | #define BTRFS_DEVICE_GETSET_FUNCS(name) \ |
| 213 | static inline u64 \ |
| 214 | btrfs_device_get_##name(const struct btrfs_device *dev) \ |
| 215 | { \ |
| 216 | u64 size; \ |
| 217 | \ |
| 218 | preempt_disable(); \ |
| 219 | size = dev->name; \ |
| 220 | preempt_enable(); \ |
| 221 | return size; \ |
| 222 | } \ |
| 223 | \ |
| 224 | static inline void \ |
| 225 | btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ |
| 226 | { \ |
| 227 | preempt_disable(); \ |
| 228 | dev->name = size; \ |
| 229 | preempt_enable(); \ |
| 230 | } |
| 231 | #else |
| 232 | #define BTRFS_DEVICE_GETSET_FUNCS(name) \ |
| 233 | static inline u64 \ |
| 234 | btrfs_device_get_##name(const struct btrfs_device *dev) \ |
| 235 | { \ |
| 236 | return dev->name; \ |
| 237 | } \ |
| 238 | \ |
| 239 | static inline void \ |
| 240 | btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ |
| 241 | { \ |
| 242 | dev->name = size; \ |
| 243 | } |
| 244 | #endif |
| 245 | |
| 246 | BTRFS_DEVICE_GETSET_FUNCS(total_bytes); |
| 247 | BTRFS_DEVICE_GETSET_FUNCS(disk_total_bytes); |
| 248 | BTRFS_DEVICE_GETSET_FUNCS(bytes_used); |
| 249 | |
Naohiro Aota | c4a816c | 2020-02-25 12:56:08 +0900 | [diff] [blame] | 250 | enum btrfs_chunk_allocation_policy { |
| 251 | BTRFS_CHUNK_ALLOC_REGULAR, |
Naohiro Aota | 1cd6121 | 2021-02-04 19:21:48 +0900 | [diff] [blame] | 252 | BTRFS_CHUNK_ALLOC_ZONED, |
Naohiro Aota | c4a816c | 2020-02-25 12:56:08 +0900 | [diff] [blame] | 253 | }; |
| 254 | |
Anand Jain | 33fd2f7 | 2020-10-28 21:14:46 +0800 | [diff] [blame] | 255 | /* |
| 256 | * Read policies for mirrored block group profiles, read picks the stripe based |
| 257 | * on these policies. |
| 258 | */ |
| 259 | enum btrfs_read_policy { |
| 260 | /* Use process PID to choose the stripe */ |
| 261 | BTRFS_READ_POLICY_PID, |
| 262 | BTRFS_NR_READ_POLICY, |
| 263 | }; |
| 264 | |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 265 | struct btrfs_fs_devices { |
| 266 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
Nikolay Borisov | 7239ff4 | 2018-10-30 16:43:23 +0200 | [diff] [blame] | 267 | u8 metadata_uuid[BTRFS_FSID_SIZE]; |
Nikolay Borisov | d1a6300 | 2018-10-30 16:43:26 +0200 | [diff] [blame] | 268 | bool fsid_change; |
Anand Jain | c4babc5 | 2018-04-12 10:29:25 +0800 | [diff] [blame] | 269 | struct list_head fs_list; |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 270 | |
Anand Jain | add9745 | 2021-10-05 16:12:40 -0400 | [diff] [blame] | 271 | /* |
| 272 | * Number of devices under this fsid including missing and |
| 273 | * replace-target device and excludes seed devices. |
| 274 | */ |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 275 | u64 num_devices; |
Anand Jain | add9745 | 2021-10-05 16:12:40 -0400 | [diff] [blame] | 276 | |
| 277 | /* |
| 278 | * The number of devices that successfully opened, including |
| 279 | * replace-target, excludes seed devices. |
| 280 | */ |
Chris Mason | a0af469 | 2008-05-13 16:03:06 -0400 | [diff] [blame] | 281 | u64 open_devices; |
Anand Jain | add9745 | 2021-10-05 16:12:40 -0400 | [diff] [blame] | 282 | |
| 283 | /* The number of devices that are under the chunk allocation list. */ |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 284 | u64 rw_devices; |
Anand Jain | add9745 | 2021-10-05 16:12:40 -0400 | [diff] [blame] | 285 | |
| 286 | /* Count of missing devices under this fsid excluding seed device. */ |
Chris Mason | cd02dca | 2010-12-13 14:56:23 -0500 | [diff] [blame] | 287 | u64 missing_devices; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 288 | u64 total_rw_bytes; |
Anand Jain | add9745 | 2021-10-05 16:12:40 -0400 | [diff] [blame] | 289 | |
| 290 | /* |
| 291 | * Count of devices from btrfs_super_block::num_devices for this fsid, |
| 292 | * which includes the seed device, excludes the transient replace-target |
| 293 | * device. |
| 294 | */ |
Josef Bacik | 02db084 | 2012-06-21 16:03:58 -0400 | [diff] [blame] | 295 | u64 total_devices; |
Nikolay Borisov | d1a6300 | 2018-10-30 16:43:26 +0200 | [diff] [blame] | 296 | |
| 297 | /* Highest generation number of seen devices */ |
| 298 | u64 latest_generation; |
| 299 | |
Anand Jain | d24fa5c | 2021-08-24 13:05:19 +0800 | [diff] [blame] | 300 | /* |
| 301 | * The mount device or a device with highest generation after removal |
| 302 | * or replace. |
| 303 | */ |
| 304 | struct btrfs_device *latest_dev; |
Chris Mason | e5e9a52 | 2009-06-10 15:17:02 -0400 | [diff] [blame] | 305 | |
| 306 | /* all of the devices in the FS, protected by a mutex |
| 307 | * so we can safely walk it to write out the supers without |
Wang Shilong | 9b011ad | 2013-10-25 19:12:02 +0800 | [diff] [blame] | 308 | * worrying about add/remove by the multi-device code. |
| 309 | * Scrubbing super can kick off supers writing by holding |
| 310 | * this mutex lock. |
Chris Mason | e5e9a52 | 2009-06-10 15:17:02 -0400 | [diff] [blame] | 311 | */ |
| 312 | struct mutex device_list_mutex; |
Nikolay Borisov | 0b6f5d4 | 2019-05-09 18:11:11 +0300 | [diff] [blame] | 313 | |
| 314 | /* List of all devices, protected by device_list_mutex */ |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 315 | struct list_head devices; |
Chris Mason | b307571 | 2008-04-22 09:22:07 -0400 | [diff] [blame] | 316 | |
Nikolay Borisov | 0b6f5d4 | 2019-05-09 18:11:11 +0300 | [diff] [blame] | 317 | /* |
| 318 | * Devices which can satisfy space allocation. Protected by |
| 319 | * chunk_mutex |
| 320 | */ |
Chris Mason | b307571 | 2008-04-22 09:22:07 -0400 | [diff] [blame] | 321 | struct list_head alloc_list; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 322 | |
Nikolay Borisov | 944d3f9 | 2020-07-16 10:25:33 +0300 | [diff] [blame] | 323 | struct list_head seed_list; |
Johannes Thumshirn | 0395d84 | 2019-11-13 11:27:27 +0100 | [diff] [blame] | 324 | bool seeding; |
Yan Zheng | 2b82032 | 2008-11-17 21:11:30 -0500 | [diff] [blame] | 325 | |
| 326 | int opened; |
Chris Mason | c289811 | 2009-06-10 09:51:32 -0400 | [diff] [blame] | 327 | |
| 328 | /* set when we find or add a device that doesn't have the |
| 329 | * nonrot flag set |
| 330 | */ |
Johannes Thumshirn | 7f0432d | 2019-11-13 11:27:28 +0100 | [diff] [blame] | 331 | bool rotating; |
Anand Jain | 2e7910d | 2015-03-10 06:38:29 +0800 | [diff] [blame] | 332 | |
Anand Jain | 5a13f43 | 2015-03-10 06:38:31 +0800 | [diff] [blame] | 333 | struct btrfs_fs_info *fs_info; |
Anand Jain | 2e7910d | 2015-03-10 06:38:29 +0800 | [diff] [blame] | 334 | /* sysfs kobjects */ |
Anand Jain | c1b7e47 | 2015-08-14 18:32:50 +0800 | [diff] [blame] | 335 | struct kobject fsid_kobj; |
Anand Jain | b550150 | 2019-11-21 17:33:30 +0800 | [diff] [blame] | 336 | struct kobject *devices_kobj; |
Anand Jain | a013d14 | 2020-02-12 17:28:10 +0800 | [diff] [blame] | 337 | struct kobject *devinfo_kobj; |
Anand Jain | 2e7910d | 2015-03-10 06:38:29 +0800 | [diff] [blame] | 338 | struct completion kobj_unregister; |
Naohiro Aota | c4a816c | 2020-02-25 12:56:08 +0900 | [diff] [blame] | 339 | |
| 340 | enum btrfs_chunk_allocation_policy chunk_alloc_policy; |
Anand Jain | 33fd2f7 | 2020-10-28 21:14:46 +0800 | [diff] [blame] | 341 | |
| 342 | /* Policy used to read the mirrored stripes */ |
| 343 | enum btrfs_read_policy read_policy; |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 344 | }; |
| 345 | |
Miao Xie | facc8a22 | 2013-07-25 19:22:34 +0800 | [diff] [blame] | 346 | #define BTRFS_BIO_INLINE_CSUM_SIZE 64 |
| 347 | |
Qu Wenruo | ab4ba2e | 2019-03-08 14:20:03 +0800 | [diff] [blame] | 348 | #define BTRFS_MAX_DEVS(info) ((BTRFS_MAX_ITEM_SIZE(info) \ |
| 349 | - sizeof(struct btrfs_chunk)) \ |
| 350 | / sizeof(struct btrfs_stripe) + 1) |
| 351 | |
| 352 | #define BTRFS_MAX_DEVS_SYS_CHUNK ((BTRFS_SYSTEM_CHUNK_ARRAY_SIZE \ |
| 353 | - 2 * sizeof(struct btrfs_disk_key) \ |
| 354 | - 2 * sizeof(struct btrfs_chunk)) \ |
| 355 | / sizeof(struct btrfs_stripe) + 1) |
| 356 | |
Chris Mason | 9be3395 | 2013-05-17 18:30:14 -0400 | [diff] [blame] | 357 | /* |
Christoph Hellwig | ee5b46a | 2022-06-21 08:26:27 +0200 | [diff] [blame] | 358 | * Maximum number of sectors for a single bio to limit the size of the |
| 359 | * checksum array. This matches the number of bio_vecs per bio and thus the |
| 360 | * I/O size for buffered I/O. |
| 361 | */ |
| 362 | #define BTRFS_MAX_BIO_SECTORS (256) |
| 363 | |
| 364 | /* |
Qu Wenruo | c3a3b19 | 2021-09-15 15:17:18 +0800 | [diff] [blame] | 365 | * Additional info to pass along bio. |
| 366 | * |
| 367 | * Mostly for btrfs specific features like csum and mirror_num. |
Chris Mason | 9be3395 | 2013-05-17 18:30:14 -0400 | [diff] [blame] | 368 | */ |
Qu Wenruo | c3a3b19 | 2021-09-15 15:17:18 +0800 | [diff] [blame] | 369 | struct btrfs_bio { |
Miao Xie | c1dc089 | 2014-09-12 18:43:56 +0800 | [diff] [blame] | 370 | unsigned int mirror_num; |
Qu Wenruo | c3a3b19 | 2021-09-15 15:17:18 +0800 | [diff] [blame] | 371 | |
Christoph Hellwig | 00d8252 | 2022-03-24 17:06:27 +0100 | [diff] [blame] | 372 | /* for direct I/O */ |
| 373 | u64 file_offset; |
| 374 | |
Qu Wenruo | c3a3b19 | 2021-09-15 15:17:18 +0800 | [diff] [blame] | 375 | /* @device is for stripe IO submission. */ |
Nikolay Borisov | c31efbd | 2020-07-03 11:14:27 +0300 | [diff] [blame] | 376 | struct btrfs_device *device; |
Miao Xie | facc8a22 | 2013-07-25 19:22:34 +0800 | [diff] [blame] | 377 | u8 *csum; |
| 378 | u8 csum_inline[BTRFS_BIO_INLINE_CSUM_SIZE]; |
Liu Bo | 17347ce | 2017-05-15 15:33:27 -0700 | [diff] [blame] | 379 | struct bvec_iter iter; |
Qu Wenruo | c3a3b19 | 2021-09-15 15:17:18 +0800 | [diff] [blame] | 380 | |
Christoph Hellwig | d7b9416 | 2022-05-26 09:36:40 +0200 | [diff] [blame] | 381 | /* For read end I/O handling */ |
| 382 | struct work_struct end_io_work; |
| 383 | |
David Sterba | fa1bcbe | 2017-06-12 17:29:36 +0200 | [diff] [blame] | 384 | /* |
| 385 | * This member must come last, bio_alloc_bioset will allocate enough |
Qu Wenruo | c3a3b19 | 2021-09-15 15:17:18 +0800 | [diff] [blame] | 386 | * bytes for entire btrfs_bio but relies on bio being last. |
David Sterba | fa1bcbe | 2017-06-12 17:29:36 +0200 | [diff] [blame] | 387 | */ |
Chris Mason | 9be3395 | 2013-05-17 18:30:14 -0400 | [diff] [blame] | 388 | struct bio bio; |
| 389 | }; |
| 390 | |
Qu Wenruo | c3a3b19 | 2021-09-15 15:17:18 +0800 | [diff] [blame] | 391 | static inline struct btrfs_bio *btrfs_bio(struct bio *bio) |
Chris Mason | 9be3395 | 2013-05-17 18:30:14 -0400 | [diff] [blame] | 392 | { |
Qu Wenruo | c3a3b19 | 2021-09-15 15:17:18 +0800 | [diff] [blame] | 393 | return container_of(bio, struct btrfs_bio, bio); |
Chris Mason | 9be3395 | 2013-05-17 18:30:14 -0400 | [diff] [blame] | 394 | } |
| 395 | |
Qu Wenruo | c3a3b19 | 2021-09-15 15:17:18 +0800 | [diff] [blame] | 396 | static inline void btrfs_bio_free_csum(struct btrfs_bio *bbio) |
David Sterba | b3a0dd5 | 2018-11-22 17:16:49 +0100 | [diff] [blame] | 397 | { |
Qu Wenruo | c3a3b19 | 2021-09-15 15:17:18 +0800 | [diff] [blame] | 398 | if (bbio->csum != bbio->csum_inline) { |
| 399 | kfree(bbio->csum); |
| 400 | bbio->csum = NULL; |
David Sterba | b3a0dd5 | 2018-11-22 17:16:49 +0100 | [diff] [blame] | 401 | } |
| 402 | } |
| 403 | |
Qu Wenruo | 261d812 | 2022-05-22 13:47:53 +0200 | [diff] [blame] | 404 | /* |
| 405 | * Iterate through a btrfs_bio (@bbio) on a per-sector basis. |
| 406 | * |
| 407 | * bvl - struct bio_vec |
| 408 | * bbio - struct btrfs_bio |
| 409 | * iters - struct bvec_iter |
| 410 | * bio_offset - unsigned int |
| 411 | */ |
| 412 | #define btrfs_bio_for_each_sector(fs_info, bvl, bbio, iter, bio_offset) \ |
| 413 | for ((iter) = (bbio)->iter, (bio_offset) = 0; \ |
| 414 | (iter).bi_size && \ |
| 415 | (((bvl) = bio_iter_iovec((&(bbio)->bio), (iter))), 1); \ |
| 416 | (bio_offset) += fs_info->sectorsize, \ |
| 417 | bio_advance_iter_single(&(bbio)->bio, &(iter), \ |
| 418 | (fs_info)->sectorsize)) |
| 419 | |
Qu Wenruo | 4c66461 | 2021-09-15 15:17:16 +0800 | [diff] [blame] | 420 | struct btrfs_io_stripe { |
Chris Mason | cea9e44 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 421 | struct btrfs_device *dev; |
Christoph Hellwig | 9ff7ddd | 2022-05-26 09:36:42 +0200 | [diff] [blame] | 422 | union { |
| 423 | /* Block mapping */ |
| 424 | u64 physical; |
| 425 | /* For the endio handler */ |
| 426 | struct btrfs_io_context *bioc; |
| 427 | }; |
Christoph Hellwig | a4012f0 | 2022-06-03 08:57:25 +0200 | [diff] [blame] | 428 | }; |
| 429 | |
| 430 | struct btrfs_discard_stripe { |
| 431 | struct btrfs_device *dev; |
| 432 | u64 physical; |
| 433 | u64 length; |
Chris Mason | cea9e44 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 434 | }; |
| 435 | |
Qu Wenruo | 4c66461 | 2021-09-15 15:17:16 +0800 | [diff] [blame] | 436 | /* |
| 437 | * Context for IO subsmission for device stripe. |
| 438 | * |
| 439 | * - Track the unfinished mirrors for mirror based profiles |
| 440 | * Mirror based profiles are SINGLE/DUP/RAID1/RAID10. |
| 441 | * |
| 442 | * - Contain the logical -> physical mapping info |
| 443 | * Used by submit_stripe_bio() for mapping logical bio |
| 444 | * into physical device address. |
| 445 | * |
| 446 | * - Contain device replace info |
| 447 | * Used by handle_ops_on_dev_replace() to copy logical bios |
| 448 | * into the new device. |
| 449 | * |
| 450 | * - Contain RAID56 full stripe logical bytenrs |
| 451 | */ |
| 452 | struct btrfs_io_context { |
Elena Reshetova | 140475a | 2017-03-03 10:55:10 +0200 | [diff] [blame] | 453 | refcount_t refs; |
Chris Mason | cea9e44 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 454 | atomic_t stripes_pending; |
Miao Xie | c404e0d | 2014-01-30 16:46:55 +0800 | [diff] [blame] | 455 | struct btrfs_fs_info *fs_info; |
Zhao Lei | 10f1190 | 2015-01-20 15:11:43 +0800 | [diff] [blame] | 456 | u64 map_type; /* get from map_lookup->type */ |
Chris Mason | cea9e44 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 457 | bio_end_io_t *end_io; |
Chris Mason | 7d2b4da | 2008-08-05 10:13:57 -0400 | [diff] [blame] | 458 | struct bio *orig_bio; |
Chris Mason | cea9e44 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 459 | void *private; |
Chris Mason | a236aed | 2008-04-29 09:38:00 -0400 | [diff] [blame] | 460 | atomic_t error; |
| 461 | int max_errors; |
Chris Mason | cea9e44 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 462 | int num_stripes; |
Jan Schmidt | a1d3c47 | 2011-08-04 17:15:33 +0200 | [diff] [blame] | 463 | int mirror_num; |
Miao Xie | 2c8cdd6 | 2014-11-14 16:06:25 +0800 | [diff] [blame] | 464 | int num_tgtdevs; |
| 465 | int *tgtdev_map; |
Zhao Lei | 8e5cfb5 | 2015-01-20 15:11:33 +0800 | [diff] [blame] | 466 | /* |
| 467 | * logical block numbers for the start of each stripe |
| 468 | * The last one or two are p/q. These are sorted, |
| 469 | * so raid_map[0] is the start of our full stripe |
| 470 | */ |
| 471 | u64 *raid_map; |
Qu Wenruo | 4c66461 | 2021-09-15 15:17:16 +0800 | [diff] [blame] | 472 | struct btrfs_io_stripe stripes[]; |
Chris Mason | cea9e44 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 473 | }; |
| 474 | |
Miao Xie | b2117a3 | 2011-01-05 10:07:28 +0000 | [diff] [blame] | 475 | struct btrfs_device_info { |
| 476 | struct btrfs_device *dev; |
| 477 | u64 dev_offset; |
| 478 | u64 max_avail; |
Arne Jansen | 73c5de0 | 2011-04-12 12:07:57 +0200 | [diff] [blame] | 479 | u64 total_avail; |
Miao Xie | b2117a3 | 2011-01-05 10:07:28 +0000 | [diff] [blame] | 480 | }; |
| 481 | |
Liu Bo | 31e5022 | 2012-11-21 14:18:10 +0000 | [diff] [blame] | 482 | struct btrfs_raid_attr { |
David Sterba | 8c3e358 | 2019-05-17 11:43:36 +0200 | [diff] [blame] | 483 | u8 sub_stripes; /* sub_stripes info for map */ |
| 484 | u8 dev_stripes; /* stripes per dev */ |
| 485 | u8 devs_max; /* max devs to use */ |
| 486 | u8 devs_min; /* min devs needed */ |
| 487 | u8 tolerated_failures; /* max tolerated fail devs */ |
| 488 | u8 devs_increment; /* ndevs has to be a multiple of this */ |
| 489 | u8 ncopies; /* how many copies to data has */ |
| 490 | u8 nparity; /* number of stripes worth of bytes to store |
Hans van Kranenburg | b50836e | 2018-10-04 23:24:42 +0200 | [diff] [blame] | 491 | * parity information */ |
David Sterba | 8c3e358 | 2019-05-17 11:43:36 +0200 | [diff] [blame] | 492 | u8 mindev_error; /* error code if min devs requisite is unmet */ |
Anand Jain | ed23467 | 2018-04-25 19:01:42 +0800 | [diff] [blame] | 493 | const char raid_name[8]; /* name of the raid */ |
Anand Jain | 41a6e89 | 2018-04-25 19:01:43 +0800 | [diff] [blame] | 494 | u64 bg_flag; /* block group flag of the raid */ |
Liu Bo | 31e5022 | 2012-11-21 14:18:10 +0000 | [diff] [blame] | 495 | }; |
| 496 | |
Zhao Lei | af90204 | 2015-09-15 21:08:06 +0800 | [diff] [blame] | 497 | extern const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES]; |
Zhao Lei | af90204 | 2015-09-15 21:08:06 +0800 | [diff] [blame] | 498 | |
liubo | 1abe9b8 | 2011-03-24 11:18:59 +0000 | [diff] [blame] | 499 | struct map_lookup { |
| 500 | u64 type; |
| 501 | int io_align; |
| 502 | int io_width; |
Qu Wenruo | cc353a8 | 2022-04-12 17:32:51 +0800 | [diff] [blame] | 503 | u32 stripe_len; |
liubo | 1abe9b8 | 2011-03-24 11:18:59 +0000 | [diff] [blame] | 504 | int num_stripes; |
| 505 | int sub_stripes; |
Qu Wenruo | cf90d88 | 2018-08-01 10:37:19 +0800 | [diff] [blame] | 506 | int verified_stripes; /* For mount time dev extent verification */ |
Qu Wenruo | 4c66461 | 2021-09-15 15:17:16 +0800 | [diff] [blame] | 507 | struct btrfs_io_stripe stripes[]; |
liubo | 1abe9b8 | 2011-03-24 11:18:59 +0000 | [diff] [blame] | 508 | }; |
| 509 | |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 510 | #define map_lookup_size(n) (sizeof(struct map_lookup) + \ |
Qu Wenruo | 4c66461 | 2021-09-15 15:17:16 +0800 | [diff] [blame] | 511 | (sizeof(struct btrfs_io_stripe) * (n))) |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 512 | |
Ilya Dryomov | c9e9f97 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 513 | struct btrfs_balance_args; |
Ilya Dryomov | 19a39dc | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 514 | struct btrfs_balance_progress; |
Ilya Dryomov | c9e9f97 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 515 | struct btrfs_balance_control { |
Ilya Dryomov | c9e9f97 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 516 | struct btrfs_balance_args data; |
| 517 | struct btrfs_balance_args meta; |
| 518 | struct btrfs_balance_args sys; |
| 519 | |
| 520 | u64 flags; |
Ilya Dryomov | 19a39dc | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 521 | |
| 522 | struct btrfs_balance_progress stat; |
Ilya Dryomov | c9e9f97 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 523 | }; |
| 524 | |
Josef Bacik | 562d7b1 | 2021-10-05 16:12:42 -0400 | [diff] [blame] | 525 | /* |
| 526 | * Search for a given device by the set parameters |
| 527 | */ |
| 528 | struct btrfs_dev_lookup_args { |
| 529 | u64 devid; |
| 530 | u8 *uuid; |
| 531 | u8 *fsid; |
| 532 | bool missing; |
| 533 | }; |
| 534 | |
| 535 | /* We have to initialize to -1 because BTRFS_DEV_REPLACE_DEVID is 0 */ |
| 536 | #define BTRFS_DEV_LOOKUP_ARGS_INIT { .devid = (u64)-1 } |
| 537 | |
| 538 | #define BTRFS_DEV_LOOKUP_ARGS(name) \ |
| 539 | struct btrfs_dev_lookup_args name = BTRFS_DEV_LOOKUP_ARGS_INIT |
| 540 | |
Christoph Hellwig | cf8cddd | 2016-10-27 09:27:36 +0200 | [diff] [blame] | 541 | enum btrfs_map_op { |
| 542 | BTRFS_MAP_READ, |
| 543 | BTRFS_MAP_WRITE, |
| 544 | BTRFS_MAP_DISCARD, |
| 545 | BTRFS_MAP_GET_READ_MIRRORS, |
| 546 | }; |
| 547 | |
| 548 | static inline enum btrfs_map_op btrfs_op(struct bio *bio) |
| 549 | { |
| 550 | switch (bio_op(bio)) { |
| 551 | case REQ_OP_DISCARD: |
| 552 | return BTRFS_MAP_DISCARD; |
| 553 | case REQ_OP_WRITE: |
Naohiro Aota | cfe9444 | 2021-02-04 19:21:59 +0900 | [diff] [blame] | 554 | case REQ_OP_ZONE_APPEND: |
Christoph Hellwig | cf8cddd | 2016-10-27 09:27:36 +0200 | [diff] [blame] | 555 | return BTRFS_MAP_WRITE; |
| 556 | default: |
| 557 | WARN_ON_ONCE(1); |
Marcos Paulo de Souza | c730ae0 | 2020-06-16 15:54:29 -0300 | [diff] [blame] | 558 | fallthrough; |
Christoph Hellwig | cf8cddd | 2016-10-27 09:27:36 +0200 | [diff] [blame] | 559 | case REQ_OP_READ: |
| 560 | return BTRFS_MAP_READ; |
| 561 | } |
| 562 | } |
| 563 | |
Qu Wenruo | 4c66461 | 2021-09-15 15:17:16 +0800 | [diff] [blame] | 564 | void btrfs_get_bioc(struct btrfs_io_context *bioc); |
| 565 | void btrfs_put_bioc(struct btrfs_io_context *bioc); |
Christoph Hellwig | cf8cddd | 2016-10-27 09:27:36 +0200 | [diff] [blame] | 566 | int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, |
Chris Mason | cea9e44 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 567 | u64 logical, u64 *length, |
Qu Wenruo | 4c66461 | 2021-09-15 15:17:16 +0800 | [diff] [blame] | 568 | struct btrfs_io_context **bioc_ret, int mirror_num); |
Christoph Hellwig | cf8cddd | 2016-10-27 09:27:36 +0200 | [diff] [blame] | 569 | int btrfs_map_sblock(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, |
Miao Xie | af8e2d1 | 2014-10-23 14:42:50 +0800 | [diff] [blame] | 570 | u64 logical, u64 *length, |
Qu Wenruo | 4c66461 | 2021-09-15 15:17:16 +0800 | [diff] [blame] | 571 | struct btrfs_io_context **bioc_ret); |
Christoph Hellwig | a4012f0 | 2022-06-03 08:57:25 +0200 | [diff] [blame] | 572 | struct btrfs_discard_stripe *btrfs_map_discard(struct btrfs_fs_info *fs_info, |
| 573 | u64 logical, u64 *length_ret, |
| 574 | u32 *num_stripes); |
Michal Rostecki | 4203431 | 2021-01-27 14:57:27 +0100 | [diff] [blame] | 575 | int btrfs_get_io_geometry(struct btrfs_fs_info *fs_info, struct extent_map *map, |
Qu Wenruo | 43c0d1a | 2021-04-13 17:58:48 +0800 | [diff] [blame] | 576 | enum btrfs_map_op op, u64 logical, |
Michal Rostecki | 4203431 | 2021-01-27 14:57:27 +0100 | [diff] [blame] | 577 | struct btrfs_io_geometry *io_geom); |
Jeff Mahoney | 6bccf3a | 2016-06-21 21:16:51 -0400 | [diff] [blame] | 578 | int btrfs_read_sys_array(struct btrfs_fs_info *fs_info); |
Jeff Mahoney | 5b4aace | 2016-06-21 10:40:19 -0400 | [diff] [blame] | 579 | int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info); |
Nikolay Borisov | f6f39f7 | 2021-08-18 13:41:19 +0300 | [diff] [blame] | 580 | struct btrfs_block_group *btrfs_create_chunk(struct btrfs_trans_handle *trans, |
Filipe Manana | 79bd371 | 2021-06-29 14:43:06 +0100 | [diff] [blame] | 581 | u64 type); |
David Sterba | c8bf1b6 | 2019-05-17 11:43:17 +0200 | [diff] [blame] | 582 | void btrfs_mapping_tree_free(struct extent_map_tree *tree); |
Christoph Hellwig | 1a722d8 | 2022-06-17 12:04:07 +0200 | [diff] [blame] | 583 | void btrfs_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio, int mirror_num); |
Chris Mason | 8a4b83c | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 584 | int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, |
Christoph Hellwig | 97288f2 | 2008-12-02 06:36:09 -0500 | [diff] [blame] | 585 | fmode_t flags, void *holder); |
Gu Jinxiang | 36350e9 | 2018-07-12 14:23:16 +0800 | [diff] [blame] | 586 | struct btrfs_device *btrfs_scan_one_device(const char *path, |
| 587 | fmode_t flags, void *holder); |
Anand Jain | 16cab91 | 2022-01-12 13:06:00 +0800 | [diff] [blame] | 588 | int btrfs_forget_devices(dev_t devt); |
Nikolay Borisov | 54eed6a | 2020-07-15 13:48:48 +0300 | [diff] [blame] | 589 | void btrfs_close_devices(struct btrfs_fs_devices *fs_devices); |
Anand Jain | bacce86 | 2020-11-06 16:06:33 +0800 | [diff] [blame] | 590 | void btrfs_free_extra_devids(struct btrfs_fs_devices *fs_devices); |
Nikolay Borisov | d6507cf | 2018-07-20 19:37:50 +0300 | [diff] [blame] | 591 | void btrfs_assign_next_active_device(struct btrfs_device *device, |
| 592 | struct btrfs_device *this_dev); |
Nikolay Borisov | a27a94c | 2018-09-03 12:46:14 +0300 | [diff] [blame] | 593 | struct btrfs_device *btrfs_find_device_by_devspec(struct btrfs_fs_info *fs_info, |
| 594 | u64 devid, |
| 595 | const char *devpath); |
Josef Bacik | faa775c | 2021-10-05 16:12:43 -0400 | [diff] [blame] | 596 | int btrfs_get_dev_args_from_path(struct btrfs_fs_info *fs_info, |
| 597 | struct btrfs_dev_lookup_args *args, |
| 598 | const char *path); |
Ilya Dryomov | 12bd2fc | 2013-08-23 13:20:17 +0300 | [diff] [blame] | 599 | struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info, |
| 600 | const u64 *devid, |
| 601 | const u8 *uuid); |
Josef Bacik | faa775c | 2021-10-05 16:12:43 -0400 | [diff] [blame] | 602 | void btrfs_put_dev_args_from_path(struct btrfs_dev_lookup_args *args); |
David Sterba | a425f9d | 2018-03-20 15:47:33 +0100 | [diff] [blame] | 603 | void btrfs_free_device(struct btrfs_device *device); |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 604 | int btrfs_rm_device(struct btrfs_fs_info *fs_info, |
Josef Bacik | 1a15eb7 | 2021-10-05 16:12:44 -0400 | [diff] [blame] | 605 | struct btrfs_dev_lookup_args *args, |
Josef Bacik | 3fa421d | 2021-07-27 17:01:17 -0400 | [diff] [blame] | 606 | struct block_device **bdev, fmode_t *mode); |
David Sterba | ffc5a37 | 2018-02-19 17:24:15 +0100 | [diff] [blame] | 607 | void __exit btrfs_cleanup_fs_uuids(void); |
Stefan Behrens | 5d96405 | 2012-11-05 14:59:07 +0100 | [diff] [blame] | 608 | 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] | 609 | int btrfs_grow_device(struct btrfs_trans_handle *trans, |
| 610 | struct btrfs_device *device, u64 new_size); |
Josef Bacik | 562d7b1 | 2021-10-05 16:12:42 -0400 | [diff] [blame] | 611 | struct btrfs_device *btrfs_find_device(const struct btrfs_fs_devices *fs_devices, |
| 612 | const struct btrfs_dev_lookup_args *args); |
Chris Mason | 8f18cf1 | 2008-04-25 16:53:30 -0400 | [diff] [blame] | 613 | int btrfs_shrink_device(struct btrfs_device *device, u64 new_size); |
David Sterba | da353f6 | 2017-02-14 17:55:53 +0100 | [diff] [blame] | 614 | int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *path); |
David Sterba | 6fcf6e2 | 2018-05-07 17:44:03 +0200 | [diff] [blame] | 615 | int btrfs_balance(struct btrfs_fs_info *fs_info, |
| 616 | struct btrfs_balance_control *bctl, |
Ilya Dryomov | c9e9f97 | 2012-01-16 22:04:47 +0200 | [diff] [blame] | 617 | struct btrfs_ioctl_balance_args *bargs); |
Anand Jain | f89e09c | 2018-11-20 16:12:55 +0800 | [diff] [blame] | 618 | void btrfs_describe_block_groups(u64 flags, char *buf, u32 size_buf); |
Ilya Dryomov | 2b6ba62 | 2012-06-22 12:24:13 -0600 | [diff] [blame] | 619 | int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info); |
Ilya Dryomov | 68310a5 | 2012-06-22 12:24:12 -0600 | [diff] [blame] | 620 | int btrfs_recover_balance(struct btrfs_fs_info *fs_info); |
Ilya Dryomov | 837d5b6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 621 | int btrfs_pause_balance(struct btrfs_fs_info *fs_info); |
Johannes Thumshirn | 18bb8bb | 2021-04-19 16:41:02 +0900 | [diff] [blame] | 622 | int btrfs_relocate_chunk(struct btrfs_fs_info *fs_info, u64 chunk_offset); |
Ilya Dryomov | a7e99c6 | 2012-01-16 22:04:49 +0200 | [diff] [blame] | 623 | int btrfs_cancel_balance(struct btrfs_fs_info *fs_info); |
Stefan Behrens | f7a81ea | 2013-08-15 17:11:19 +0200 | [diff] [blame] | 624 | int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info); |
Nikolay Borisov | 97f4dd0 | 2020-02-18 16:56:08 +0200 | [diff] [blame] | 625 | int btrfs_uuid_scan_kthread(void *data); |
Anand Jain | a09f23c | 2021-08-24 13:27:42 +0800 | [diff] [blame] | 626 | bool btrfs_chunk_writeable(struct btrfs_fs_info *fs_info, u64 chunk_offset); |
Nikolay Borisov | 60dfdf2 | 2019-03-27 14:24:14 +0200 | [diff] [blame] | 627 | int find_free_dev_extent(struct btrfs_device *device, u64 num_bytes, |
Josef Bacik | ba1bf48 | 2009-09-11 16:11:19 -0400 | [diff] [blame] | 628 | u64 *start, u64 *max_avail); |
Stefan Behrens | 442a4f6 | 2012-05-25 16:06:08 +0200 | [diff] [blame] | 629 | void btrfs_dev_stat_inc_and_print(struct btrfs_device *dev, int index); |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 630 | int btrfs_get_dev_stats(struct btrfs_fs_info *fs_info, |
David Sterba | b27f7c0 | 2012-06-22 06:30:39 -0600 | [diff] [blame] | 631 | struct btrfs_ioctl_get_dev_stats *stats); |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 632 | void btrfs_init_devices_late(struct btrfs_fs_info *fs_info); |
Stefan Behrens | 733f4fb | 2012-05-25 16:06:10 +0200 | [diff] [blame] | 633 | int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info); |
David Sterba | 196c9d8 | 2019-03-20 16:50:38 +0100 | [diff] [blame] | 634 | int btrfs_run_dev_stats(struct btrfs_trans_handle *trans); |
Nikolay Borisov | 68a9db5 | 2018-07-20 19:37:48 +0300 | [diff] [blame] | 635 | void btrfs_rm_dev_replace_remove_srcdev(struct btrfs_device *srcdev); |
David Sterba | 65237ee | 2019-03-20 16:34:54 +0100 | [diff] [blame] | 636 | void btrfs_rm_dev_replace_free_srcdev(struct btrfs_device *srcdev); |
Nikolay Borisov | 4f5ad7b | 2018-07-20 19:37:51 +0300 | [diff] [blame] | 637 | void btrfs_destroy_dev_replace_tgtdev(struct btrfs_device *tgtdev); |
Liu Bo | 592d92e | 2017-03-14 13:33:55 -0700 | [diff] [blame] | 638 | int btrfs_is_parity_mirror(struct btrfs_fs_info *fs_info, |
Nikolay Borisov | e4ff5fb | 2017-07-19 10:48:42 +0300 | [diff] [blame] | 639 | u64 logical, u64 len); |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 640 | unsigned long btrfs_full_stripe_len(struct btrfs_fs_info *fs_info, |
David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 641 | u64 logical); |
Qu Wenruo | bc88b48 | 2022-05-13 16:34:28 +0800 | [diff] [blame] | 642 | u64 btrfs_calc_stripe_length(const struct extent_map *em); |
Qu Wenruo | 0b30f71 | 2022-05-13 16:34:30 +0800 | [diff] [blame] | 643 | int btrfs_nr_parity_stripes(u64 type); |
Filipe Manana | 79bd371 | 2021-06-29 14:43:06 +0100 | [diff] [blame] | 644 | int btrfs_chunk_alloc_add_chunk_item(struct btrfs_trans_handle *trans, |
| 645 | struct btrfs_block_group *bg); |
Nikolay Borisov | 97aff91 | 2018-07-20 19:37:53 +0300 | [diff] [blame] | 646 | int btrfs_remove_chunk(struct btrfs_trans_handle *trans, u64 chunk_offset); |
Omar Sandoval | 60ca842 | 2018-05-16 16:34:31 -0700 | [diff] [blame] | 647 | struct extent_map *btrfs_get_chunk_map(struct btrfs_fs_info *fs_info, |
| 648 | u64 logical, u64 length); |
Johannes Thumshirn | 8f32380 | 2020-02-14 00:24:32 +0900 | [diff] [blame] | 649 | void btrfs_release_disk_super(struct btrfs_super_block *super); |
Miao Xie | addc3fa | 2014-07-24 11:37:11 +0800 | [diff] [blame] | 650 | |
Stefan Behrens | 442a4f6 | 2012-05-25 16:06:08 +0200 | [diff] [blame] | 651 | static inline void btrfs_dev_stat_inc(struct btrfs_device *dev, |
| 652 | int index) |
| 653 | { |
| 654 | atomic_inc(dev->dev_stat_values + index); |
Nikolay Borisov | 9deae96 | 2017-10-24 13:47:37 +0300 | [diff] [blame] | 655 | /* |
| 656 | * This memory barrier orders stores updating statistics before stores |
| 657 | * updating dev_stats_ccnt. |
| 658 | * |
| 659 | * It pairs with smp_rmb() in btrfs_run_dev_stats(). |
| 660 | */ |
Miao Xie | addc3fa | 2014-07-24 11:37:11 +0800 | [diff] [blame] | 661 | smp_mb__before_atomic(); |
| 662 | atomic_inc(&dev->dev_stats_ccnt); |
Stefan Behrens | 442a4f6 | 2012-05-25 16:06:08 +0200 | [diff] [blame] | 663 | } |
| 664 | |
| 665 | static inline int btrfs_dev_stat_read(struct btrfs_device *dev, |
| 666 | int index) |
| 667 | { |
| 668 | return atomic_read(dev->dev_stat_values + index); |
| 669 | } |
| 670 | |
| 671 | static inline int btrfs_dev_stat_read_and_reset(struct btrfs_device *dev, |
| 672 | int index) |
| 673 | { |
| 674 | int ret; |
| 675 | |
| 676 | ret = atomic_xchg(dev->dev_stat_values + index, 0); |
Nikolay Borisov | 4660c49 | 2017-10-20 18:10:58 +0300 | [diff] [blame] | 677 | /* |
| 678 | * atomic_xchg implies a full memory barriers as per atomic_t.txt: |
| 679 | * - RMW operations that have a return value are fully ordered; |
| 680 | * |
| 681 | * This implicit memory barriers is paired with the smp_rmb in |
| 682 | * btrfs_run_dev_stats |
| 683 | */ |
Miao Xie | addc3fa | 2014-07-24 11:37:11 +0800 | [diff] [blame] | 684 | atomic_inc(&dev->dev_stats_ccnt); |
Stefan Behrens | 442a4f6 | 2012-05-25 16:06:08 +0200 | [diff] [blame] | 685 | return ret; |
| 686 | } |
| 687 | |
| 688 | static inline void btrfs_dev_stat_set(struct btrfs_device *dev, |
| 689 | int index, unsigned long val) |
| 690 | { |
| 691 | atomic_set(dev->dev_stat_values + index, val); |
Nikolay Borisov | 9deae96 | 2017-10-24 13:47:37 +0300 | [diff] [blame] | 692 | /* |
| 693 | * This memory barrier orders stores updating statistics before stores |
| 694 | * updating dev_stats_ccnt. |
| 695 | * |
| 696 | * It pairs with smp_rmb() in btrfs_run_dev_stats(). |
| 697 | */ |
Miao Xie | addc3fa | 2014-07-24 11:37:11 +0800 | [diff] [blame] | 698 | smp_mb__before_atomic(); |
| 699 | atomic_inc(&dev->dev_stats_ccnt); |
Stefan Behrens | 442a4f6 | 2012-05-25 16:06:08 +0200 | [diff] [blame] | 700 | } |
| 701 | |
Nikolay Borisov | bbbf724 | 2019-03-25 14:31:22 +0200 | [diff] [blame] | 702 | void btrfs_commit_device_sizes(struct btrfs_transaction *trans); |
Filipe Manana | 0421682 | 2014-11-27 21:14:15 +0000 | [diff] [blame] | 703 | |
David Sterba | 4143cb8 | 2019-10-01 19:57:37 +0200 | [diff] [blame] | 704 | struct list_head * __attribute_const__ btrfs_get_fs_uuids(void); |
Anand Jain | 6528b99 | 2017-12-18 17:08:59 +0800 | [diff] [blame] | 705 | bool btrfs_check_rw_degradable(struct btrfs_fs_info *fs_info, |
| 706 | struct btrfs_device *failing_dev); |
Josef Bacik | 313b085 | 2020-08-20 11:18:26 -0400 | [diff] [blame] | 707 | void btrfs_scratch_superblocks(struct btrfs_fs_info *fs_info, |
| 708 | struct block_device *bdev, |
| 709 | const char *device_path); |
Qu Wenruo | 21634a1 | 2017-03-09 09:34:36 +0800 | [diff] [blame] | 710 | |
David Sterba | 500a44c | 2021-07-26 14:15:19 +0200 | [diff] [blame] | 711 | enum btrfs_raid_types __attribute_const__ btrfs_bg_flags_to_raid_index(u64 flags); |
David Sterba | 46df06b | 2018-07-13 20:46:30 +0200 | [diff] [blame] | 712 | int btrfs_bg_type_to_factor(u64 flags); |
David Sterba | 158da51 | 2019-05-17 11:43:41 +0200 | [diff] [blame] | 713 | const char *btrfs_bg_type_to_raid_name(u64 flags); |
Qu Wenruo | cf90d88 | 2018-08-01 10:37:19 +0800 | [diff] [blame] | 714 | int btrfs_verify_dev_extents(struct btrfs_fs_info *fs_info); |
Johannes Thumshirn | 554aed7 | 2021-12-07 06:28:36 -0800 | [diff] [blame] | 715 | bool btrfs_repair_one_zone(struct btrfs_fs_info *fs_info, u64 logical); |
David Sterba | 46df06b | 2018-07-13 20:46:30 +0200 | [diff] [blame] | 716 | |
Chris Mason | 0b86a83 | 2008-03-24 15:01:56 -0400 | [diff] [blame] | 717 | #endif |