10b86a832SChris Mason /* 20b86a832SChris Mason * Copyright (C) 2007 Oracle. All rights reserved. 30b86a832SChris Mason * 40b86a832SChris Mason * This program is free software; you can redistribute it and/or 50b86a832SChris Mason * modify it under the terms of the GNU General Public 60b86a832SChris Mason * License v2 as published by the Free Software Foundation. 70b86a832SChris Mason * 80b86a832SChris Mason * This program is distributed in the hope that it will be useful, 90b86a832SChris Mason * but WITHOUT ANY WARRANTY; without even the implied warranty of 100b86a832SChris Mason * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 110b86a832SChris Mason * General Public License for more details. 120b86a832SChris Mason * 130b86a832SChris Mason * You should have received a copy of the GNU General Public 140b86a832SChris Mason * License along with this program; if not, write to the 150b86a832SChris Mason * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 160b86a832SChris Mason * Boston, MA 021110-1307, USA. 170b86a832SChris Mason */ 180b86a832SChris Mason 190b86a832SChris Mason #ifndef __BTRFS_VOLUMES_ 200b86a832SChris Mason #define __BTRFS_VOLUMES_ 218790d502SChris Mason 22cea9e445SChris Mason #include <linux/bio.h> 23b2117a39SMiao Xie #include <linux/sort.h> 2455e301fdSFilipe Brandenburger #include <linux/btrfs.h> 258b712842SChris Mason #include "async-thread.h" 26cea9e445SChris Mason 2767a2c45eSMiao Xie extern struct mutex uuid_mutex; 2867a2c45eSMiao Xie 29b2117a39SMiao Xie #define BTRFS_STRIPE_LEN (64 * 1024) 30b2117a39SMiao Xie 31f2984462SChris Mason struct buffer_head; 32ffbd517dSChris Mason struct btrfs_pending_bios { 33ffbd517dSChris Mason struct bio *head; 34ffbd517dSChris Mason struct bio *tail; 35ffbd517dSChris Mason }; 36ffbd517dSChris Mason 377cc8e58dSMiao Xie /* 387cc8e58dSMiao Xie * Use sequence counter to get consistent device stat data on 397cc8e58dSMiao Xie * 32-bit processors. 407cc8e58dSMiao Xie */ 417cc8e58dSMiao Xie #if BITS_PER_LONG==32 && defined(CONFIG_SMP) 427cc8e58dSMiao Xie #include <linux/seqlock.h> 437cc8e58dSMiao Xie #define __BTRFS_NEED_DEVICE_DATA_ORDERED 447cc8e58dSMiao Xie #define btrfs_device_data_ordered_init(device) \ 457cc8e58dSMiao Xie seqcount_init(&device->data_seqcount) 467cc8e58dSMiao Xie #else 477cc8e58dSMiao Xie #define btrfs_device_data_ordered_init(device) do { } while (0) 487cc8e58dSMiao Xie #endif 497cc8e58dSMiao Xie 500b86a832SChris Mason struct btrfs_device { 510b86a832SChris Mason struct list_head dev_list; 52b3075717SChris Mason struct list_head dev_alloc_list; 532b82032cSYan Zheng struct btrfs_fs_devices *fs_devices; 54d5ee37bcSMiao Xie 550b86a832SChris Mason struct btrfs_root *dev_root; 56ffbd517dSChris Mason 57d5ee37bcSMiao Xie struct rcu_string *name; 58d5ee37bcSMiao Xie 59d5ee37bcSMiao Xie u64 generation; 60d5ee37bcSMiao Xie 61d5ee37bcSMiao Xie spinlock_t io_lock ____cacheline_aligned; 62d5ee37bcSMiao Xie int running_pending; 63ffbd517dSChris Mason /* regular prio bios */ 64ffbd517dSChris Mason struct btrfs_pending_bios pending_bios; 65ffbd517dSChris Mason /* WRITE_SYNC bios */ 66ffbd517dSChris Mason struct btrfs_pending_bios pending_sync_bios; 67ffbd517dSChris Mason 68d5ee37bcSMiao Xie struct block_device *bdev; 69d5ee37bcSMiao Xie 70d5ee37bcSMiao Xie /* the mode sent to blkdev_get */ 71d5ee37bcSMiao Xie fmode_t mode; 72d5ee37bcSMiao Xie 732b82032cSYan Zheng int writeable; 74dfe25020SChris Mason int in_fs_metadata; 75cd02dca5SChris Mason int missing; 76d5e2003cSJosef Bacik int can_discard; 7763a212abSStefan Behrens int is_tgtdev_for_dev_replace; 78b3075717SChris Mason 797cc8e58dSMiao Xie #ifdef __BTRFS_NEED_DEVICE_DATA_ORDERED 807cc8e58dSMiao Xie seqcount_t data_seqcount; 817cc8e58dSMiao Xie #endif 827cc8e58dSMiao Xie 830b86a832SChris Mason /* the internal btrfs device id */ 840b86a832SChris Mason u64 devid; 850b86a832SChris Mason 866ba40b61SMiao Xie /* size of the device in memory */ 870b86a832SChris Mason u64 total_bytes; 880b86a832SChris Mason 896ba40b61SMiao Xie /* size of the device on disk */ 90d6397baeSChris Ball u64 disk_total_bytes; 91d6397baeSChris Ball 920b86a832SChris Mason /* bytes used */ 930b86a832SChris Mason u64 bytes_used; 940b86a832SChris Mason 950b86a832SChris Mason /* optimal io alignment for this device */ 960b86a832SChris Mason u32 io_align; 970b86a832SChris Mason 980b86a832SChris Mason /* optimal io width for this device */ 990b86a832SChris Mason u32 io_width; 1003c45bfc1SDulshani Gunawardhana /* type and info about this device */ 1013c45bfc1SDulshani Gunawardhana u64 type; 1020b86a832SChris Mason 1030b86a832SChris Mason /* minimal io size for this device */ 1040b86a832SChris Mason u32 sector_size; 1050b86a832SChris Mason 1060b86a832SChris Mason /* physical drive uuid (or lvm uuid) */ 107e17cade2SChris Mason u8 uuid[BTRFS_UUID_SIZE]; 1088b712842SChris Mason 109935e5cc9SMiao Xie /* 110935e5cc9SMiao Xie * size of the device on the current transaction 111935e5cc9SMiao Xie * 112935e5cc9SMiao Xie * This variant is update when committing the transaction, 113935e5cc9SMiao Xie * and protected by device_list_mutex 114935e5cc9SMiao Xie */ 115935e5cc9SMiao Xie u64 commit_total_bytes; 116935e5cc9SMiao Xie 117ce7213c7SMiao Xie /* bytes used on the current transaction */ 118ce7213c7SMiao Xie u64 commit_bytes_used; 119935e5cc9SMiao Xie /* 120935e5cc9SMiao Xie * used to manage the device which is resized 121935e5cc9SMiao Xie * 122935e5cc9SMiao Xie * It is protected by chunk_lock. 123935e5cc9SMiao Xie */ 124935e5cc9SMiao Xie struct list_head resized_list; 125935e5cc9SMiao Xie 1263c45bfc1SDulshani Gunawardhana /* for sending down flush barriers */ 1273c45bfc1SDulshani Gunawardhana int nobarriers; 1283c45bfc1SDulshani Gunawardhana struct bio *flush_bio; 1293c45bfc1SDulshani Gunawardhana struct completion flush_wait; 1303c45bfc1SDulshani Gunawardhana 131a2de733cSArne Jansen /* per-device scrub information */ 132d9d181c1SStefan Behrens struct scrub_ctx *scrub_device; 133a2de733cSArne Jansen 134d458b054SQu Wenruo struct btrfs_work work; 1351f78160cSXiao Guangrong struct rcu_head rcu; 1361f78160cSXiao Guangrong struct work_struct rcu_work; 13790519d66SArne Jansen 13890519d66SArne Jansen /* readahead state */ 13990519d66SArne Jansen spinlock_t reada_lock; 14090519d66SArne Jansen atomic_t reada_in_flight; 14190519d66SArne Jansen u64 reada_next; 14290519d66SArne Jansen struct reada_zone *reada_curr_zone; 14390519d66SArne Jansen struct radix_tree_root reada_zones; 14490519d66SArne Jansen struct radix_tree_root reada_extents; 145387125fcSChris Mason 146442a4f63SStefan Behrens /* disk I/O failure stats. For detailed description refer to 147442a4f63SStefan Behrens * enum btrfs_dev_stat_values in ioctl.h */ 148733f4fbbSStefan Behrens int dev_stats_valid; 149addc3fa7SMiao Xie 150addc3fa7SMiao Xie /* Counter to record the change of device stats */ 151addc3fa7SMiao Xie atomic_t dev_stats_ccnt; 152442a4f63SStefan Behrens atomic_t dev_stat_values[BTRFS_DEV_STAT_VALUES_MAX]; 1530b86a832SChris Mason }; 1540b86a832SChris Mason 1557cc8e58dSMiao Xie /* 1567cc8e58dSMiao Xie * If we read those variants at the context of their own lock, we needn't 1577cc8e58dSMiao Xie * use the following helpers, reading them directly is safe. 1587cc8e58dSMiao Xie */ 1597cc8e58dSMiao Xie #if BITS_PER_LONG==32 && defined(CONFIG_SMP) 1607cc8e58dSMiao Xie #define BTRFS_DEVICE_GETSET_FUNCS(name) \ 1617cc8e58dSMiao Xie static inline u64 \ 1627cc8e58dSMiao Xie btrfs_device_get_##name(const struct btrfs_device *dev) \ 1637cc8e58dSMiao Xie { \ 1647cc8e58dSMiao Xie u64 size; \ 1657cc8e58dSMiao Xie unsigned int seq; \ 1667cc8e58dSMiao Xie \ 1677cc8e58dSMiao Xie do { \ 1687cc8e58dSMiao Xie seq = read_seqcount_begin(&dev->data_seqcount); \ 1697cc8e58dSMiao Xie size = dev->name; \ 1707cc8e58dSMiao Xie } while (read_seqcount_retry(&dev->data_seqcount, seq)); \ 1717cc8e58dSMiao Xie return size; \ 1727cc8e58dSMiao Xie } \ 1737cc8e58dSMiao Xie \ 1747cc8e58dSMiao Xie static inline void \ 1757cc8e58dSMiao Xie btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ 1767cc8e58dSMiao Xie { \ 1777cc8e58dSMiao Xie preempt_disable(); \ 1787cc8e58dSMiao Xie write_seqcount_begin(&dev->data_seqcount); \ 1797cc8e58dSMiao Xie dev->name = size; \ 1807cc8e58dSMiao Xie write_seqcount_end(&dev->data_seqcount); \ 1817cc8e58dSMiao Xie preempt_enable(); \ 1827cc8e58dSMiao Xie } 1837cc8e58dSMiao Xie #elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPT) 1847cc8e58dSMiao Xie #define BTRFS_DEVICE_GETSET_FUNCS(name) \ 1857cc8e58dSMiao Xie static inline u64 \ 1867cc8e58dSMiao Xie btrfs_device_get_##name(const struct btrfs_device *dev) \ 1877cc8e58dSMiao Xie { \ 1887cc8e58dSMiao Xie u64 size; \ 1897cc8e58dSMiao Xie \ 1907cc8e58dSMiao Xie preempt_disable(); \ 1917cc8e58dSMiao Xie size = dev->name; \ 1927cc8e58dSMiao Xie preempt_enable(); \ 1937cc8e58dSMiao Xie return size; \ 1947cc8e58dSMiao Xie } \ 1957cc8e58dSMiao Xie \ 1967cc8e58dSMiao Xie static inline void \ 1977cc8e58dSMiao Xie btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ 1987cc8e58dSMiao Xie { \ 1997cc8e58dSMiao Xie preempt_disable(); \ 2007cc8e58dSMiao Xie dev->name = size; \ 2017cc8e58dSMiao Xie preempt_enable(); \ 2027cc8e58dSMiao Xie } 2037cc8e58dSMiao Xie #else 2047cc8e58dSMiao Xie #define BTRFS_DEVICE_GETSET_FUNCS(name) \ 2057cc8e58dSMiao Xie static inline u64 \ 2067cc8e58dSMiao Xie btrfs_device_get_##name(const struct btrfs_device *dev) \ 2077cc8e58dSMiao Xie { \ 2087cc8e58dSMiao Xie return dev->name; \ 2097cc8e58dSMiao Xie } \ 2107cc8e58dSMiao Xie \ 2117cc8e58dSMiao Xie static inline void \ 2127cc8e58dSMiao Xie btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ 2137cc8e58dSMiao Xie { \ 2147cc8e58dSMiao Xie dev->name = size; \ 2157cc8e58dSMiao Xie } 2167cc8e58dSMiao Xie #endif 2177cc8e58dSMiao Xie 2187cc8e58dSMiao Xie BTRFS_DEVICE_GETSET_FUNCS(total_bytes); 2197cc8e58dSMiao Xie BTRFS_DEVICE_GETSET_FUNCS(disk_total_bytes); 2207cc8e58dSMiao Xie BTRFS_DEVICE_GETSET_FUNCS(bytes_used); 2217cc8e58dSMiao Xie 2228a4b83ccSChris Mason struct btrfs_fs_devices { 2238a4b83ccSChris Mason u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 2248a4b83ccSChris Mason 2258a4b83ccSChris Mason u64 num_devices; 226a0af469bSChris Mason u64 open_devices; 2272b82032cSYan Zheng u64 rw_devices; 228cd02dca5SChris Mason u64 missing_devices; 2292b82032cSYan Zheng u64 total_rw_bytes; 23002db0844SJosef Bacik u64 total_devices; 2318a4b83ccSChris Mason struct block_device *latest_bdev; 232e5e9a520SChris Mason 233e5e9a520SChris Mason /* all of the devices in the FS, protected by a mutex 234e5e9a520SChris Mason * so we can safely walk it to write out the supers without 2359b011adfSWang Shilong * worrying about add/remove by the multi-device code. 2369b011adfSWang Shilong * Scrubbing super can kick off supers writing by holding 2379b011adfSWang Shilong * this mutex lock. 238e5e9a520SChris Mason */ 239e5e9a520SChris Mason struct mutex device_list_mutex; 2408a4b83ccSChris Mason struct list_head devices; 241b3075717SChris Mason 242935e5cc9SMiao Xie struct list_head resized_devices; 243b3075717SChris Mason /* devices not currently being allocated */ 244b3075717SChris Mason struct list_head alloc_list; 2458a4b83ccSChris Mason struct list_head list; 2462b82032cSYan Zheng 2472b82032cSYan Zheng struct btrfs_fs_devices *seed; 2482b82032cSYan Zheng int seeding; 2492b82032cSYan Zheng 2502b82032cSYan Zheng int opened; 251c289811cSChris Mason 252c289811cSChris Mason /* set when we find or add a device that doesn't have the 253c289811cSChris Mason * nonrot flag set 254c289811cSChris Mason */ 255c289811cSChris Mason int rotating; 2568a4b83ccSChris Mason }; 2578a4b83ccSChris Mason 258facc8a22SMiao Xie #define BTRFS_BIO_INLINE_CSUM_SIZE 64 259facc8a22SMiao Xie 2609be3395bSChris Mason /* 2619be3395bSChris Mason * we need the mirror number and stripe index to be passed around 2629be3395bSChris Mason * the call chain while we are processing end_io (especially errors). 2639be3395bSChris Mason * Really, what we need is a btrfs_bio structure that has this info 2649be3395bSChris Mason * and is properly sized with its stripe array, but we're not there 2659be3395bSChris Mason * quite yet. We have our own btrfs bioset, and all of the bios 2669be3395bSChris Mason * we allocate are actually btrfs_io_bios. We'll cram as much of 2679be3395bSChris Mason * struct btrfs_bio as we can into this over time. 2689be3395bSChris Mason */ 269facc8a22SMiao Xie typedef void (btrfs_io_bio_end_io_t) (struct btrfs_io_bio *bio, int err); 2709be3395bSChris Mason struct btrfs_io_bio { 271c1dc0896SMiao Xie unsigned int mirror_num; 272c1dc0896SMiao Xie unsigned int stripe_index; 273c1dc0896SMiao Xie u64 logical; 274facc8a22SMiao Xie u8 *csum; 275facc8a22SMiao Xie u8 csum_inline[BTRFS_BIO_INLINE_CSUM_SIZE]; 276facc8a22SMiao Xie u8 *csum_allocated; 277facc8a22SMiao Xie btrfs_io_bio_end_io_t *end_io; 2789be3395bSChris Mason struct bio bio; 2799be3395bSChris Mason }; 2809be3395bSChris Mason 2819be3395bSChris Mason static inline struct btrfs_io_bio *btrfs_io_bio(struct bio *bio) 2829be3395bSChris Mason { 2839be3395bSChris Mason return container_of(bio, struct btrfs_io_bio, bio); 2849be3395bSChris Mason } 2859be3395bSChris Mason 286cea9e445SChris Mason struct btrfs_bio_stripe { 287cea9e445SChris Mason struct btrfs_device *dev; 288cea9e445SChris Mason u64 physical; 289fce3bb9aSLi Dongyang u64 length; /* only used for discard mappings */ 290cea9e445SChris Mason }; 291cea9e445SChris Mason 292a1d3c478SJan Schmidt struct btrfs_bio; 293a1d3c478SJan Schmidt typedef void (btrfs_bio_end_io_t) (struct btrfs_bio *bio, int err); 294a1d3c478SJan Schmidt 2952c8cdd6eSMiao Xie #define BTRFS_BIO_ORIG_BIO_SUBMITTED (1 << 0) 296c55f1396SMiao Xie 297a1d3c478SJan Schmidt struct btrfs_bio { 2986e9606d2SZhao Lei atomic_t refs; 299cea9e445SChris Mason atomic_t stripes_pending; 300c404e0dcSMiao Xie struct btrfs_fs_info *fs_info; 301cea9e445SChris Mason bio_end_io_t *end_io; 3027d2b4daaSChris Mason struct bio *orig_bio; 303c55f1396SMiao Xie unsigned long flags; 304cea9e445SChris Mason void *private; 305a236aed1SChris Mason atomic_t error; 306a236aed1SChris Mason int max_errors; 307cea9e445SChris Mason int num_stripes; 308a1d3c478SJan Schmidt int mirror_num; 3092c8cdd6eSMiao Xie int num_tgtdevs; 3102c8cdd6eSMiao Xie int *tgtdev_map; 3118e5cfb55SZhao Lei /* 3128e5cfb55SZhao Lei * logical block numbers for the start of each stripe 3138e5cfb55SZhao Lei * The last one or two are p/q. These are sorted, 3148e5cfb55SZhao Lei * so raid_map[0] is the start of our full stripe 3158e5cfb55SZhao Lei */ 3168e5cfb55SZhao Lei u64 *raid_map; 317cea9e445SChris Mason struct btrfs_bio_stripe stripes[]; 318cea9e445SChris Mason }; 319cea9e445SChris Mason 320b2117a39SMiao Xie struct btrfs_device_info { 321b2117a39SMiao Xie struct btrfs_device *dev; 322b2117a39SMiao Xie u64 dev_offset; 323b2117a39SMiao Xie u64 max_avail; 32473c5de00SArne Jansen u64 total_avail; 325b2117a39SMiao Xie }; 326b2117a39SMiao Xie 32731e50229SLiu Bo struct btrfs_raid_attr { 32831e50229SLiu Bo int sub_stripes; /* sub_stripes info for map */ 32931e50229SLiu Bo int dev_stripes; /* stripes per dev */ 33031e50229SLiu Bo int devs_max; /* max devs to use */ 33131e50229SLiu Bo int devs_min; /* min devs needed */ 33231e50229SLiu Bo int devs_increment; /* ndevs has to be a multiple of this */ 33331e50229SLiu Bo int ncopies; /* how many copies to data has */ 33431e50229SLiu Bo }; 33531e50229SLiu Bo 3361abe9b8aSliubo struct map_lookup { 3371abe9b8aSliubo u64 type; 3381abe9b8aSliubo int io_align; 3391abe9b8aSliubo int io_width; 3401abe9b8aSliubo int stripe_len; 3411abe9b8aSliubo int sector_size; 3421abe9b8aSliubo int num_stripes; 3431abe9b8aSliubo int sub_stripes; 3441abe9b8aSliubo struct btrfs_bio_stripe stripes[]; 3451abe9b8aSliubo }; 3461abe9b8aSliubo 347a2de733cSArne Jansen #define map_lookup_size(n) (sizeof(struct map_lookup) + \ 348a2de733cSArne Jansen (sizeof(struct btrfs_bio_stripe) * (n))) 349a2de733cSArne Jansen 350f43ffb60SIlya Dryomov /* 351f43ffb60SIlya Dryomov * Restriper's general type filter 352f43ffb60SIlya Dryomov */ 353f43ffb60SIlya Dryomov #define BTRFS_BALANCE_DATA (1ULL << 0) 354f43ffb60SIlya Dryomov #define BTRFS_BALANCE_SYSTEM (1ULL << 1) 355f43ffb60SIlya Dryomov #define BTRFS_BALANCE_METADATA (1ULL << 2) 356f43ffb60SIlya Dryomov 357f43ffb60SIlya Dryomov #define BTRFS_BALANCE_TYPE_MASK (BTRFS_BALANCE_DATA | \ 358f43ffb60SIlya Dryomov BTRFS_BALANCE_SYSTEM | \ 359f43ffb60SIlya Dryomov BTRFS_BALANCE_METADATA) 360e4d8ec0fSIlya Dryomov 361e4d8ec0fSIlya Dryomov #define BTRFS_BALANCE_FORCE (1ULL << 3) 36259641015SIlya Dryomov #define BTRFS_BALANCE_RESUME (1ULL << 4) 363e4d8ec0fSIlya Dryomov 364ed25e9b2SIlya Dryomov /* 365ed25e9b2SIlya Dryomov * Balance filters 366ed25e9b2SIlya Dryomov */ 367ed25e9b2SIlya Dryomov #define BTRFS_BALANCE_ARGS_PROFILES (1ULL << 0) 3685ce5b3c0SIlya Dryomov #define BTRFS_BALANCE_ARGS_USAGE (1ULL << 1) 369409d404bSIlya Dryomov #define BTRFS_BALANCE_ARGS_DEVID (1ULL << 2) 37094e60d5aSIlya Dryomov #define BTRFS_BALANCE_ARGS_DRANGE (1ULL << 3) 371ea67176aSIlya Dryomov #define BTRFS_BALANCE_ARGS_VRANGE (1ULL << 4) 3727d824b6fSDavid Sterba #define BTRFS_BALANCE_ARGS_LIMIT (1ULL << 5) 373f43ffb60SIlya Dryomov 374cfa4c961SIlya Dryomov /* 375cfa4c961SIlya Dryomov * Profile changing flags. When SOFT is set we won't relocate chunk if 376cfa4c961SIlya Dryomov * it already has the target profile (even though it may be 377cfa4c961SIlya Dryomov * half-filled). 378cfa4c961SIlya Dryomov */ 379e4d8ec0fSIlya Dryomov #define BTRFS_BALANCE_ARGS_CONVERT (1ULL << 8) 380cfa4c961SIlya Dryomov #define BTRFS_BALANCE_ARGS_SOFT (1ULL << 9) 381e4d8ec0fSIlya Dryomov 382c9e9f97bSIlya Dryomov struct btrfs_balance_args; 38319a39dceSIlya Dryomov struct btrfs_balance_progress; 384c9e9f97bSIlya Dryomov struct btrfs_balance_control { 385c9e9f97bSIlya Dryomov struct btrfs_fs_info *fs_info; 386c9e9f97bSIlya Dryomov 387c9e9f97bSIlya Dryomov struct btrfs_balance_args data; 388c9e9f97bSIlya Dryomov struct btrfs_balance_args meta; 389c9e9f97bSIlya Dryomov struct btrfs_balance_args sys; 390c9e9f97bSIlya Dryomov 391c9e9f97bSIlya Dryomov u64 flags; 39219a39dceSIlya Dryomov 39319a39dceSIlya Dryomov struct btrfs_balance_progress stat; 394c9e9f97bSIlya Dryomov }; 395c9e9f97bSIlya Dryomov 3966d07bcecSMiao Xie int btrfs_account_dev_extents_size(struct btrfs_device *device, u64 start, 3976d07bcecSMiao Xie u64 end, u64 *length); 3986e9606d2SZhao Lei void btrfs_get_bbio(struct btrfs_bio *bbio); 3996e9606d2SZhao Lei void btrfs_put_bbio(struct btrfs_bio *bbio); 4003ec706c8SStefan Behrens int btrfs_map_block(struct btrfs_fs_info *fs_info, int rw, 401cea9e445SChris Mason u64 logical, u64 *length, 402a1d3c478SJan Schmidt struct btrfs_bio **bbio_ret, int mirror_num); 403af8e2d1dSMiao Xie int btrfs_map_sblock(struct btrfs_fs_info *fs_info, int rw, 404af8e2d1dSMiao Xie u64 logical, u64 *length, 405af8e2d1dSMiao Xie struct btrfs_bio **bbio_ret, int mirror_num, 4068e5cfb55SZhao Lei int need_raid_map); 407a512bbf8SYan Zheng int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree, 408a512bbf8SYan Zheng u64 chunk_start, u64 physical, u64 devid, 409a512bbf8SYan Zheng u64 **logical, int *naddrs, int *stripe_len); 410e4404d6eSYan Zheng int btrfs_read_sys_array(struct btrfs_root *root); 4110b86a832SChris Mason int btrfs_read_chunk_tree(struct btrfs_root *root); 4120b86a832SChris Mason int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, 4132b82032cSYan Zheng struct btrfs_root *extent_root, u64 type); 4140b86a832SChris Mason void btrfs_mapping_init(struct btrfs_mapping_tree *tree); 4150b86a832SChris Mason void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree); 416f188591eSChris Mason int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio, 4178b712842SChris Mason int mirror_num, int async_submit); 4188a4b83ccSChris Mason int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, 41997288f2cSChristoph Hellwig fmode_t flags, void *holder); 42097288f2cSChristoph Hellwig int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder, 4218a4b83ccSChris Mason struct btrfs_fs_devices **fs_devices_ret); 4228a4b83ccSChris Mason int btrfs_close_devices(struct btrfs_fs_devices *fs_devices); 4238dabb742SStefan Behrens void btrfs_close_extra_devices(struct btrfs_fs_info *fs_info, 4248dabb742SStefan Behrens struct btrfs_fs_devices *fs_devices, int step); 4257ba15b7dSStefan Behrens int btrfs_find_device_missing_or_by_path(struct btrfs_root *root, 4267ba15b7dSStefan Behrens char *device_path, 4277ba15b7dSStefan Behrens struct btrfs_device **device); 42812bd2fc0SIlya Dryomov struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info, 42912bd2fc0SIlya Dryomov const u64 *devid, 43012bd2fc0SIlya Dryomov const u8 *uuid); 431a061fc8dSChris Mason int btrfs_rm_device(struct btrfs_root *root, char *device_path); 432143bede5SJeff Mahoney void btrfs_cleanup_fs_uuids(void); 4335d964051SStefan Behrens int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len); 4348f18cf13SChris Mason int btrfs_grow_device(struct btrfs_trans_handle *trans, 4358f18cf13SChris Mason struct btrfs_device *device, u64 new_size); 436aa1b8cd4SStefan Behrens struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid, 4372b82032cSYan Zheng u8 *uuid, u8 *fsid); 4388f18cf13SChris Mason int btrfs_shrink_device(struct btrfs_device *device, u64 new_size); 439788f20ebSChris Mason int btrfs_init_new_device(struct btrfs_root *root, char *path); 440e93c89c1SStefan Behrens int btrfs_init_dev_replace_tgtdev(struct btrfs_root *root, char *device_path, 4411c43366dSMiao Xie struct btrfs_device *srcdev, 442e93c89c1SStefan Behrens struct btrfs_device **device_out); 443c9e9f97bSIlya Dryomov int btrfs_balance(struct btrfs_balance_control *bctl, 444c9e9f97bSIlya Dryomov struct btrfs_ioctl_balance_args *bargs); 4452b6ba629SIlya Dryomov int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info); 44668310a5eSIlya Dryomov int btrfs_recover_balance(struct btrfs_fs_info *fs_info); 447837d5b6eSIlya Dryomov int btrfs_pause_balance(struct btrfs_fs_info *fs_info); 448a7e99c69SIlya Dryomov int btrfs_cancel_balance(struct btrfs_fs_info *fs_info); 449f7a81ea4SStefan Behrens int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info); 45070f80175SStefan Behrens int btrfs_check_uuid_tree(struct btrfs_fs_info *fs_info); 4512b82032cSYan Zheng int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset); 4526df9a95eSJosef Bacik int find_free_dev_extent(struct btrfs_trans_handle *trans, 4536df9a95eSJosef Bacik struct btrfs_device *device, u64 num_bytes, 454ba1bf481SJosef Bacik u64 *start, u64 *max_avail); 455442a4f63SStefan Behrens void btrfs_dev_stat_inc_and_print(struct btrfs_device *dev, int index); 456c11d2c23SStefan Behrens int btrfs_get_dev_stats(struct btrfs_root *root, 457b27f7c0cSDavid Sterba struct btrfs_ioctl_get_dev_stats *stats); 458cb517eabSMiao Xie void btrfs_init_devices_late(struct btrfs_fs_info *fs_info); 459733f4fbbSStefan Behrens int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info); 460733f4fbbSStefan Behrens int btrfs_run_dev_stats(struct btrfs_trans_handle *trans, 461733f4fbbSStefan Behrens struct btrfs_fs_info *fs_info); 462084b6e7cSQu Wenruo void btrfs_rm_dev_replace_remove_srcdev(struct btrfs_fs_info *fs_info, 463084b6e7cSQu Wenruo struct btrfs_device *srcdev); 464084b6e7cSQu Wenruo void btrfs_rm_dev_replace_free_srcdev(struct btrfs_fs_info *fs_info, 465e93c89c1SStefan Behrens struct btrfs_device *srcdev); 466e93c89c1SStefan Behrens void btrfs_destroy_dev_replace_tgtdev(struct btrfs_fs_info *fs_info, 467e93c89c1SStefan Behrens struct btrfs_device *tgtdev); 468e93c89c1SStefan Behrens void btrfs_init_dev_replace_tgtdev_for_resume(struct btrfs_fs_info *fs_info, 469e93c89c1SStefan Behrens struct btrfs_device *tgtdev); 470a8a6dab7SStefan Behrens int btrfs_scratch_superblock(struct btrfs_device *device); 47153b381b3SDavid Woodhouse int btrfs_is_parity_mirror(struct btrfs_mapping_tree *map_tree, 47253b381b3SDavid Woodhouse u64 logical, u64 len, int mirror_num); 47353b381b3SDavid Woodhouse unsigned long btrfs_full_stripe_len(struct btrfs_root *root, 47453b381b3SDavid Woodhouse struct btrfs_mapping_tree *map_tree, 47553b381b3SDavid Woodhouse u64 logical); 4766df9a95eSJosef Bacik int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans, 4776df9a95eSJosef Bacik struct btrfs_root *extent_root, 4786df9a95eSJosef Bacik u64 chunk_offset, u64 chunk_size); 47947ab2a6cSJosef Bacik int btrfs_remove_chunk(struct btrfs_trans_handle *trans, 48047ab2a6cSJosef Bacik struct btrfs_root *root, u64 chunk_offset); 481addc3fa7SMiao Xie 482addc3fa7SMiao Xie static inline int btrfs_dev_stats_dirty(struct btrfs_device *dev) 483addc3fa7SMiao Xie { 484addc3fa7SMiao Xie return atomic_read(&dev->dev_stats_ccnt); 485addc3fa7SMiao Xie } 486addc3fa7SMiao Xie 487442a4f63SStefan Behrens static inline void btrfs_dev_stat_inc(struct btrfs_device *dev, 488442a4f63SStefan Behrens int index) 489442a4f63SStefan Behrens { 490442a4f63SStefan Behrens atomic_inc(dev->dev_stat_values + index); 491addc3fa7SMiao Xie smp_mb__before_atomic(); 492addc3fa7SMiao Xie atomic_inc(&dev->dev_stats_ccnt); 493442a4f63SStefan Behrens } 494442a4f63SStefan Behrens 495442a4f63SStefan Behrens static inline int btrfs_dev_stat_read(struct btrfs_device *dev, 496442a4f63SStefan Behrens int index) 497442a4f63SStefan Behrens { 498442a4f63SStefan Behrens return atomic_read(dev->dev_stat_values + index); 499442a4f63SStefan Behrens } 500442a4f63SStefan Behrens 501442a4f63SStefan Behrens static inline int btrfs_dev_stat_read_and_reset(struct btrfs_device *dev, 502442a4f63SStefan Behrens int index) 503442a4f63SStefan Behrens { 504442a4f63SStefan Behrens int ret; 505442a4f63SStefan Behrens 506442a4f63SStefan Behrens ret = atomic_xchg(dev->dev_stat_values + index, 0); 507addc3fa7SMiao Xie smp_mb__before_atomic(); 508addc3fa7SMiao Xie atomic_inc(&dev->dev_stats_ccnt); 509442a4f63SStefan Behrens return ret; 510442a4f63SStefan Behrens } 511442a4f63SStefan Behrens 512442a4f63SStefan Behrens static inline void btrfs_dev_stat_set(struct btrfs_device *dev, 513442a4f63SStefan Behrens int index, unsigned long val) 514442a4f63SStefan Behrens { 515442a4f63SStefan Behrens atomic_set(dev->dev_stat_values + index, val); 516addc3fa7SMiao Xie smp_mb__before_atomic(); 517addc3fa7SMiao Xie atomic_inc(&dev->dev_stats_ccnt); 518442a4f63SStefan Behrens } 519442a4f63SStefan Behrens 520442a4f63SStefan Behrens static inline void btrfs_dev_stat_reset(struct btrfs_device *dev, 521442a4f63SStefan Behrens int index) 522442a4f63SStefan Behrens { 523442a4f63SStefan Behrens btrfs_dev_stat_set(dev, index, 0); 524442a4f63SStefan Behrens } 525935e5cc9SMiao Xie 526935e5cc9SMiao Xie void btrfs_update_commit_device_size(struct btrfs_fs_info *fs_info); 527ce7213c7SMiao Xie void btrfs_update_commit_device_bytes_used(struct btrfs_root *root, 528ce7213c7SMiao Xie struct btrfs_transaction *transaction); 52904216820SFilipe Manana 53004216820SFilipe Manana static inline void lock_chunks(struct btrfs_root *root) 53104216820SFilipe Manana { 53204216820SFilipe Manana mutex_lock(&root->fs_info->chunk_mutex); 53304216820SFilipe Manana } 53404216820SFilipe Manana 53504216820SFilipe Manana static inline void unlock_chunks(struct btrfs_root *root) 53604216820SFilipe Manana { 53704216820SFilipe Manana mutex_unlock(&root->fs_info->chunk_mutex); 53804216820SFilipe Manana } 53904216820SFilipe Manana 54004216820SFilipe Manana 5410b86a832SChris Mason #endif 542