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 29ee22184bSByongho Lee #define BTRFS_STRIPE_LEN SZ_64K 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 50ebbede42SAnand Jain #define BTRFS_DEV_STATE_WRITEABLE (0) 51e12c9621SAnand Jain #define BTRFS_DEV_STATE_IN_FS_METADATA (1) 52e6e674bdSAnand Jain #define BTRFS_DEV_STATE_MISSING (2) 53401e29c1SAnand Jain #define BTRFS_DEV_STATE_REPLACE_TGT (3) 541c3063b6SAnand Jain #define BTRFS_DEV_STATE_FLUSH_SENT (4) 55ebbede42SAnand Jain 560b86a832SChris Mason struct btrfs_device { 570b86a832SChris Mason struct list_head dev_list; 58b3075717SChris Mason struct list_head dev_alloc_list; 592b82032cSYan Zheng struct btrfs_fs_devices *fs_devices; 60fb456252SJeff Mahoney struct btrfs_fs_info *fs_info; 61ffbd517dSChris Mason 62d5ee37bcSMiao Xie struct rcu_string *name; 63d5ee37bcSMiao Xie 64d5ee37bcSMiao Xie u64 generation; 65d5ee37bcSMiao Xie 66d5ee37bcSMiao Xie spinlock_t io_lock ____cacheline_aligned; 67d5ee37bcSMiao Xie int running_pending; 68ffbd517dSChris Mason /* regular prio bios */ 69ffbd517dSChris Mason struct btrfs_pending_bios pending_bios; 7070fd7614SChristoph Hellwig /* sync bios */ 71ffbd517dSChris Mason struct btrfs_pending_bios pending_sync_bios; 72ffbd517dSChris Mason 73d5ee37bcSMiao Xie struct block_device *bdev; 74d5ee37bcSMiao Xie 75d5ee37bcSMiao Xie /* the mode sent to blkdev_get */ 76d5ee37bcSMiao Xie fmode_t mode; 77d5ee37bcSMiao Xie 78ebbede42SAnand Jain unsigned long dev_state; 7958efbc9fSOmar Sandoval blk_status_t last_flush_error; 80e0ae9994SDavid Sterba int flush_bio_sent; 81b3075717SChris Mason 827cc8e58dSMiao Xie #ifdef __BTRFS_NEED_DEVICE_DATA_ORDERED 837cc8e58dSMiao Xie seqcount_t data_seqcount; 847cc8e58dSMiao Xie #endif 857cc8e58dSMiao Xie 860b86a832SChris Mason /* the internal btrfs device id */ 870b86a832SChris Mason u64 devid; 880b86a832SChris Mason 896ba40b61SMiao Xie /* size of the device in memory */ 900b86a832SChris Mason u64 total_bytes; 910b86a832SChris Mason 926ba40b61SMiao Xie /* size of the device on disk */ 93d6397baeSChris Ball u64 disk_total_bytes; 94d6397baeSChris Ball 950b86a832SChris Mason /* bytes used */ 960b86a832SChris Mason u64 bytes_used; 970b86a832SChris Mason 980b86a832SChris Mason /* optimal io alignment for this device */ 990b86a832SChris Mason u32 io_align; 1000b86a832SChris Mason 1010b86a832SChris Mason /* optimal io width for this device */ 1020b86a832SChris Mason u32 io_width; 1033c45bfc1SDulshani Gunawardhana /* type and info about this device */ 1043c45bfc1SDulshani Gunawardhana u64 type; 1050b86a832SChris Mason 1060b86a832SChris Mason /* minimal io size for this device */ 1070b86a832SChris Mason u32 sector_size; 1080b86a832SChris Mason 1090b86a832SChris Mason /* physical drive uuid (or lvm uuid) */ 110e17cade2SChris Mason u8 uuid[BTRFS_UUID_SIZE]; 1118b712842SChris Mason 112935e5cc9SMiao Xie /* 113935e5cc9SMiao Xie * size of the device on the current transaction 114935e5cc9SMiao Xie * 115935e5cc9SMiao Xie * This variant is update when committing the transaction, 116935e5cc9SMiao Xie * and protected by device_list_mutex 117935e5cc9SMiao Xie */ 118935e5cc9SMiao Xie u64 commit_total_bytes; 119935e5cc9SMiao Xie 120ce7213c7SMiao Xie /* bytes used on the current transaction */ 121ce7213c7SMiao Xie u64 commit_bytes_used; 122935e5cc9SMiao Xie /* 123935e5cc9SMiao Xie * used to manage the device which is resized 124935e5cc9SMiao Xie * 125935e5cc9SMiao Xie * It is protected by chunk_lock. 126935e5cc9SMiao Xie */ 127935e5cc9SMiao Xie struct list_head resized_list; 128935e5cc9SMiao Xie 1293c45bfc1SDulshani Gunawardhana /* for sending down flush barriers */ 1303c45bfc1SDulshani Gunawardhana struct bio *flush_bio; 1313c45bfc1SDulshani Gunawardhana struct completion flush_wait; 1323c45bfc1SDulshani Gunawardhana 133a2de733cSArne Jansen /* per-device scrub information */ 134cadbc0a0SAnand Jain struct scrub_ctx *scrub_ctx; 135a2de733cSArne Jansen 136d458b054SQu Wenruo struct btrfs_work work; 1371f78160cSXiao Guangrong struct rcu_head rcu; 13890519d66SArne Jansen 13990519d66SArne Jansen /* readahead state */ 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; 2562e7910d6SAnand Jain 2575a13f430SAnand Jain struct btrfs_fs_info *fs_info; 2582e7910d6SAnand Jain /* sysfs kobjects */ 259c1b7e474SAnand Jain struct kobject fsid_kobj; 2602e7910d6SAnand Jain struct kobject *device_dir_kobj; 2612e7910d6SAnand Jain struct completion kobj_unregister; 2628a4b83ccSChris Mason }; 2638a4b83ccSChris Mason 264facc8a22SMiao Xie #define BTRFS_BIO_INLINE_CSUM_SIZE 64 265facc8a22SMiao Xie 2669be3395bSChris Mason /* 2679be3395bSChris Mason * we need the mirror number and stripe index to be passed around 2689be3395bSChris Mason * the call chain while we are processing end_io (especially errors). 2699be3395bSChris Mason * Really, what we need is a btrfs_bio structure that has this info 2709be3395bSChris Mason * and is properly sized with its stripe array, but we're not there 2719be3395bSChris Mason * quite yet. We have our own btrfs bioset, and all of the bios 2729be3395bSChris Mason * we allocate are actually btrfs_io_bios. We'll cram as much of 2739be3395bSChris Mason * struct btrfs_bio as we can into this over time. 2749be3395bSChris Mason */ 275facc8a22SMiao Xie typedef void (btrfs_io_bio_end_io_t) (struct btrfs_io_bio *bio, int err); 2769be3395bSChris Mason struct btrfs_io_bio { 277c1dc0896SMiao Xie unsigned int mirror_num; 278c1dc0896SMiao Xie unsigned int stripe_index; 279c1dc0896SMiao Xie u64 logical; 280facc8a22SMiao Xie u8 *csum; 281facc8a22SMiao Xie u8 csum_inline[BTRFS_BIO_INLINE_CSUM_SIZE]; 282facc8a22SMiao Xie u8 *csum_allocated; 283facc8a22SMiao Xie btrfs_io_bio_end_io_t *end_io; 28417347cecSLiu Bo struct bvec_iter iter; 285fa1bcbe0SDavid Sterba /* 286fa1bcbe0SDavid Sterba * This member must come last, bio_alloc_bioset will allocate enough 287fa1bcbe0SDavid Sterba * bytes for entire btrfs_io_bio but relies on bio being last. 288fa1bcbe0SDavid Sterba */ 2899be3395bSChris Mason struct bio bio; 2909be3395bSChris Mason }; 2919be3395bSChris Mason 2929be3395bSChris Mason static inline struct btrfs_io_bio *btrfs_io_bio(struct bio *bio) 2939be3395bSChris Mason { 2949be3395bSChris Mason return container_of(bio, struct btrfs_io_bio, bio); 2959be3395bSChris Mason } 2969be3395bSChris Mason 297cea9e445SChris Mason struct btrfs_bio_stripe { 298cea9e445SChris Mason struct btrfs_device *dev; 299cea9e445SChris Mason u64 physical; 300fce3bb9aSLi Dongyang u64 length; /* only used for discard mappings */ 301cea9e445SChris Mason }; 302cea9e445SChris Mason 303a1d3c478SJan Schmidt struct btrfs_bio; 304a1d3c478SJan Schmidt typedef void (btrfs_bio_end_io_t) (struct btrfs_bio *bio, int err); 305a1d3c478SJan Schmidt 306a1d3c478SJan Schmidt struct btrfs_bio { 307140475aeSElena Reshetova refcount_t refs; 308cea9e445SChris Mason atomic_t stripes_pending; 309c404e0dcSMiao Xie struct btrfs_fs_info *fs_info; 31010f11900SZhao Lei u64 map_type; /* get from map_lookup->type */ 311cea9e445SChris Mason bio_end_io_t *end_io; 3127d2b4daaSChris Mason struct bio *orig_bio; 313c55f1396SMiao Xie unsigned long flags; 314cea9e445SChris Mason void *private; 315a236aed1SChris Mason atomic_t error; 316a236aed1SChris Mason int max_errors; 317cea9e445SChris Mason int num_stripes; 318a1d3c478SJan Schmidt int mirror_num; 3192c8cdd6eSMiao Xie int num_tgtdevs; 3202c8cdd6eSMiao Xie int *tgtdev_map; 3218e5cfb55SZhao Lei /* 3228e5cfb55SZhao Lei * logical block numbers for the start of each stripe 3238e5cfb55SZhao Lei * The last one or two are p/q. These are sorted, 3248e5cfb55SZhao Lei * so raid_map[0] is the start of our full stripe 3258e5cfb55SZhao Lei */ 3268e5cfb55SZhao Lei u64 *raid_map; 327cea9e445SChris Mason struct btrfs_bio_stripe stripes[]; 328cea9e445SChris Mason }; 329cea9e445SChris Mason 330b2117a39SMiao Xie struct btrfs_device_info { 331b2117a39SMiao Xie struct btrfs_device *dev; 332b2117a39SMiao Xie u64 dev_offset; 333b2117a39SMiao Xie u64 max_avail; 33473c5de00SArne Jansen u64 total_avail; 335b2117a39SMiao Xie }; 336b2117a39SMiao Xie 33731e50229SLiu Bo struct btrfs_raid_attr { 33831e50229SLiu Bo int sub_stripes; /* sub_stripes info for map */ 33931e50229SLiu Bo int dev_stripes; /* stripes per dev */ 34031e50229SLiu Bo int devs_max; /* max devs to use */ 34131e50229SLiu Bo int devs_min; /* min devs needed */ 3428789f4feSZhao Lei int tolerated_failures; /* max tolerated fail devs */ 34331e50229SLiu Bo int devs_increment; /* ndevs has to be a multiple of this */ 34431e50229SLiu Bo int ncopies; /* how many copies to data has */ 34531e50229SLiu Bo }; 34631e50229SLiu Bo 347af902047SZhao Lei extern const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES]; 348621292baSDavid Sterba extern const int btrfs_raid_mindev_error[BTRFS_NR_RAID_TYPES]; 349af902047SZhao Lei extern const u64 btrfs_raid_group[BTRFS_NR_RAID_TYPES]; 350af902047SZhao Lei 3511abe9b8aSliubo struct map_lookup { 3521abe9b8aSliubo u64 type; 3531abe9b8aSliubo int io_align; 3541abe9b8aSliubo int io_width; 3553d8da678SLiu Bo u64 stripe_len; 3561abe9b8aSliubo int num_stripes; 3571abe9b8aSliubo int sub_stripes; 3581abe9b8aSliubo struct btrfs_bio_stripe stripes[]; 3591abe9b8aSliubo }; 3601abe9b8aSliubo 361a2de733cSArne Jansen #define map_lookup_size(n) (sizeof(struct map_lookup) + \ 362a2de733cSArne Jansen (sizeof(struct btrfs_bio_stripe) * (n))) 363a2de733cSArne Jansen 364c9e9f97bSIlya Dryomov struct btrfs_balance_args; 36519a39dceSIlya Dryomov struct btrfs_balance_progress; 366c9e9f97bSIlya Dryomov struct btrfs_balance_control { 367c9e9f97bSIlya Dryomov struct btrfs_fs_info *fs_info; 368c9e9f97bSIlya Dryomov 369c9e9f97bSIlya Dryomov struct btrfs_balance_args data; 370c9e9f97bSIlya Dryomov struct btrfs_balance_args meta; 371c9e9f97bSIlya Dryomov struct btrfs_balance_args sys; 372c9e9f97bSIlya Dryomov 373c9e9f97bSIlya Dryomov u64 flags; 37419a39dceSIlya Dryomov 37519a39dceSIlya Dryomov struct btrfs_balance_progress stat; 376c9e9f97bSIlya Dryomov }; 377c9e9f97bSIlya Dryomov 378cf8cddd3SChristoph Hellwig enum btrfs_map_op { 379cf8cddd3SChristoph Hellwig BTRFS_MAP_READ, 380cf8cddd3SChristoph Hellwig BTRFS_MAP_WRITE, 381cf8cddd3SChristoph Hellwig BTRFS_MAP_DISCARD, 382cf8cddd3SChristoph Hellwig BTRFS_MAP_GET_READ_MIRRORS, 383cf8cddd3SChristoph Hellwig }; 384cf8cddd3SChristoph Hellwig 385cf8cddd3SChristoph Hellwig static inline enum btrfs_map_op btrfs_op(struct bio *bio) 386cf8cddd3SChristoph Hellwig { 387cf8cddd3SChristoph Hellwig switch (bio_op(bio)) { 388cf8cddd3SChristoph Hellwig case REQ_OP_DISCARD: 389cf8cddd3SChristoph Hellwig return BTRFS_MAP_DISCARD; 390cf8cddd3SChristoph Hellwig case REQ_OP_WRITE: 391cf8cddd3SChristoph Hellwig return BTRFS_MAP_WRITE; 392cf8cddd3SChristoph Hellwig default: 393cf8cddd3SChristoph Hellwig WARN_ON_ONCE(1); 394cf8cddd3SChristoph Hellwig case REQ_OP_READ: 395cf8cddd3SChristoph Hellwig return BTRFS_MAP_READ; 396cf8cddd3SChristoph Hellwig } 397cf8cddd3SChristoph Hellwig } 398cf8cddd3SChristoph Hellwig 3996d07bcecSMiao Xie int btrfs_account_dev_extents_size(struct btrfs_device *device, u64 start, 4006d07bcecSMiao Xie u64 end, u64 *length); 4016e9606d2SZhao Lei void btrfs_get_bbio(struct btrfs_bio *bbio); 4026e9606d2SZhao Lei void btrfs_put_bbio(struct btrfs_bio *bbio); 403cf8cddd3SChristoph Hellwig int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, 404cea9e445SChris Mason u64 logical, u64 *length, 405a1d3c478SJan Schmidt struct btrfs_bio **bbio_ret, int mirror_num); 406cf8cddd3SChristoph Hellwig int btrfs_map_sblock(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, 407af8e2d1dSMiao Xie u64 logical, u64 *length, 408825ad4c9SDavid Sterba struct btrfs_bio **bbio_ret); 409ab8d0fc4SJeff Mahoney int btrfs_rmap_block(struct btrfs_fs_info *fs_info, 410a512bbf8SYan Zheng u64 chunk_start, u64 physical, u64 devid, 411a512bbf8SYan Zheng u64 **logical, int *naddrs, int *stripe_len); 4126bccf3abSJeff Mahoney int btrfs_read_sys_array(struct btrfs_fs_info *fs_info); 4135b4aacefSJeff Mahoney int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info); 4140b86a832SChris Mason int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, 4152ff7e61eSJeff Mahoney struct btrfs_fs_info *fs_info, u64 type); 4160b86a832SChris Mason void btrfs_mapping_init(struct btrfs_mapping_tree *tree); 4170b86a832SChris Mason void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree); 41858efbc9fSOmar Sandoval blk_status_t btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio, 4198b712842SChris Mason int mirror_num, int async_submit); 4208a4b83ccSChris Mason int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, 42197288f2cSChristoph Hellwig fmode_t flags, void *holder); 42297288f2cSChristoph Hellwig int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder, 4238a4b83ccSChris Mason struct btrfs_fs_devices **fs_devices_ret); 4248a4b83ccSChris Mason int btrfs_close_devices(struct btrfs_fs_devices *fs_devices); 4259eaed21eSEric Sandeen void btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices, int step); 42688acff64SAnand Jain void btrfs_assign_next_active_device(struct btrfs_fs_info *fs_info, 42788acff64SAnand Jain struct btrfs_device *device, struct btrfs_device *this_dev); 4282ff7e61eSJeff Mahoney int btrfs_find_device_missing_or_by_path(struct btrfs_fs_info *fs_info, 429da353f6bSDavid Sterba const char *device_path, 4307ba15b7dSStefan Behrens struct btrfs_device **device); 4312ff7e61eSJeff Mahoney int btrfs_find_device_by_devspec(struct btrfs_fs_info *fs_info, u64 devid, 432da353f6bSDavid Sterba const char *devpath, 43324e0474bSAnand Jain struct btrfs_device **device); 43412bd2fc0SIlya Dryomov struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info, 43512bd2fc0SIlya Dryomov const u64 *devid, 43612bd2fc0SIlya Dryomov const u8 *uuid); 4372ff7e61eSJeff Mahoney int btrfs_rm_device(struct btrfs_fs_info *fs_info, 438da353f6bSDavid Sterba const char *device_path, u64 devid); 439143bede5SJeff Mahoney void btrfs_cleanup_fs_uuids(void); 4405d964051SStefan Behrens int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len); 4418f18cf13SChris Mason int btrfs_grow_device(struct btrfs_trans_handle *trans, 4428f18cf13SChris Mason struct btrfs_device *device, u64 new_size); 443aa1b8cd4SStefan Behrens struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid, 4442b82032cSYan Zheng u8 *uuid, u8 *fsid); 4458f18cf13SChris Mason int btrfs_shrink_device(struct btrfs_device *device, u64 new_size); 446da353f6bSDavid Sterba int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *path); 4472ff7e61eSJeff Mahoney int btrfs_init_dev_replace_tgtdev(struct btrfs_fs_info *fs_info, 448da353f6bSDavid Sterba const char *device_path, 4491c43366dSMiao Xie struct btrfs_device *srcdev, 450e93c89c1SStefan Behrens struct btrfs_device **device_out); 451c9e9f97bSIlya Dryomov int btrfs_balance(struct btrfs_balance_control *bctl, 452c9e9f97bSIlya Dryomov struct btrfs_ioctl_balance_args *bargs); 4532b6ba629SIlya Dryomov int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info); 45468310a5eSIlya Dryomov int btrfs_recover_balance(struct btrfs_fs_info *fs_info); 455837d5b6eSIlya Dryomov int btrfs_pause_balance(struct btrfs_fs_info *fs_info); 456a7e99c69SIlya Dryomov int btrfs_cancel_balance(struct btrfs_fs_info *fs_info); 457f7a81ea4SStefan Behrens int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info); 45870f80175SStefan Behrens int btrfs_check_uuid_tree(struct btrfs_fs_info *fs_info); 4592ff7e61eSJeff Mahoney int btrfs_chunk_readonly(struct btrfs_fs_info *fs_info, u64 chunk_offset); 460499f377fSJeff Mahoney int find_free_dev_extent_start(struct btrfs_transaction *transaction, 461499f377fSJeff Mahoney struct btrfs_device *device, u64 num_bytes, 462499f377fSJeff Mahoney u64 search_start, u64 *start, u64 *max_avail); 4636df9a95eSJosef Bacik int find_free_dev_extent(struct btrfs_trans_handle *trans, 4646df9a95eSJosef Bacik struct btrfs_device *device, u64 num_bytes, 465ba1bf481SJosef Bacik u64 *start, u64 *max_avail); 466442a4f63SStefan Behrens void btrfs_dev_stat_inc_and_print(struct btrfs_device *dev, int index); 4672ff7e61eSJeff Mahoney int btrfs_get_dev_stats(struct btrfs_fs_info *fs_info, 468b27f7c0cSDavid Sterba struct btrfs_ioctl_get_dev_stats *stats); 469cb517eabSMiao Xie void btrfs_init_devices_late(struct btrfs_fs_info *fs_info); 470733f4fbbSStefan Behrens int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info); 471733f4fbbSStefan Behrens int btrfs_run_dev_stats(struct btrfs_trans_handle *trans, 472733f4fbbSStefan Behrens struct btrfs_fs_info *fs_info); 473084b6e7cSQu Wenruo void btrfs_rm_dev_replace_remove_srcdev(struct btrfs_fs_info *fs_info, 474084b6e7cSQu Wenruo struct btrfs_device *srcdev); 475084b6e7cSQu Wenruo void btrfs_rm_dev_replace_free_srcdev(struct btrfs_fs_info *fs_info, 476e93c89c1SStefan Behrens struct btrfs_device *srcdev); 477e93c89c1SStefan Behrens void btrfs_destroy_dev_replace_tgtdev(struct btrfs_fs_info *fs_info, 478e93c89c1SStefan Behrens struct btrfs_device *tgtdev); 479da353f6bSDavid Sterba void btrfs_scratch_superblocks(struct block_device *bdev, const char *device_path); 480592d92eeSLiu Bo int btrfs_is_parity_mirror(struct btrfs_fs_info *fs_info, 481e4ff5fb5SNikolay Borisov u64 logical, u64 len); 4822ff7e61eSJeff Mahoney unsigned long btrfs_full_stripe_len(struct btrfs_fs_info *fs_info, 48353b381b3SDavid Woodhouse u64 logical); 4846df9a95eSJosef Bacik int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans, 4856bccf3abSJeff Mahoney struct btrfs_fs_info *fs_info, 4866df9a95eSJosef Bacik u64 chunk_offset, u64 chunk_size); 48747ab2a6cSJosef Bacik int btrfs_remove_chunk(struct btrfs_trans_handle *trans, 4885b4aacefSJeff Mahoney struct btrfs_fs_info *fs_info, u64 chunk_offset); 489addc3fa7SMiao Xie 490442a4f63SStefan Behrens static inline void btrfs_dev_stat_inc(struct btrfs_device *dev, 491442a4f63SStefan Behrens int index) 492442a4f63SStefan Behrens { 493442a4f63SStefan Behrens atomic_inc(dev->dev_stat_values + index); 4949deae968SNikolay Borisov /* 4959deae968SNikolay Borisov * This memory barrier orders stores updating statistics before stores 4969deae968SNikolay Borisov * updating dev_stats_ccnt. 4979deae968SNikolay Borisov * 4989deae968SNikolay Borisov * It pairs with smp_rmb() in btrfs_run_dev_stats(). 4999deae968SNikolay Borisov */ 500addc3fa7SMiao Xie smp_mb__before_atomic(); 501addc3fa7SMiao Xie atomic_inc(&dev->dev_stats_ccnt); 502442a4f63SStefan Behrens } 503442a4f63SStefan Behrens 504442a4f63SStefan Behrens static inline int btrfs_dev_stat_read(struct btrfs_device *dev, 505442a4f63SStefan Behrens int index) 506442a4f63SStefan Behrens { 507442a4f63SStefan Behrens return atomic_read(dev->dev_stat_values + index); 508442a4f63SStefan Behrens } 509442a4f63SStefan Behrens 510442a4f63SStefan Behrens static inline int btrfs_dev_stat_read_and_reset(struct btrfs_device *dev, 511442a4f63SStefan Behrens int index) 512442a4f63SStefan Behrens { 513442a4f63SStefan Behrens int ret; 514442a4f63SStefan Behrens 515442a4f63SStefan Behrens ret = atomic_xchg(dev->dev_stat_values + index, 0); 5164660c49fSNikolay Borisov /* 5174660c49fSNikolay Borisov * atomic_xchg implies a full memory barriers as per atomic_t.txt: 5184660c49fSNikolay Borisov * - RMW operations that have a return value are fully ordered; 5194660c49fSNikolay Borisov * 5204660c49fSNikolay Borisov * This implicit memory barriers is paired with the smp_rmb in 5214660c49fSNikolay Borisov * btrfs_run_dev_stats 5224660c49fSNikolay Borisov */ 523addc3fa7SMiao Xie atomic_inc(&dev->dev_stats_ccnt); 524442a4f63SStefan Behrens return ret; 525442a4f63SStefan Behrens } 526442a4f63SStefan Behrens 527442a4f63SStefan Behrens static inline void btrfs_dev_stat_set(struct btrfs_device *dev, 528442a4f63SStefan Behrens int index, unsigned long val) 529442a4f63SStefan Behrens { 530442a4f63SStefan Behrens atomic_set(dev->dev_stat_values + index, val); 5319deae968SNikolay Borisov /* 5329deae968SNikolay Borisov * This memory barrier orders stores updating statistics before stores 5339deae968SNikolay Borisov * updating dev_stats_ccnt. 5349deae968SNikolay Borisov * 5359deae968SNikolay Borisov * It pairs with smp_rmb() in btrfs_run_dev_stats(). 5369deae968SNikolay Borisov */ 537addc3fa7SMiao Xie smp_mb__before_atomic(); 538addc3fa7SMiao Xie atomic_inc(&dev->dev_stats_ccnt); 539442a4f63SStefan Behrens } 540442a4f63SStefan Behrens 541442a4f63SStefan Behrens static inline void btrfs_dev_stat_reset(struct btrfs_device *dev, 542442a4f63SStefan Behrens int index) 543442a4f63SStefan Behrens { 544442a4f63SStefan Behrens btrfs_dev_stat_set(dev, index, 0); 545442a4f63SStefan Behrens } 546935e5cc9SMiao Xie 5473e72ee88SQu Wenruo /* 5483e72ee88SQu Wenruo * Convert block group flags (BTRFS_BLOCK_GROUP_*) to btrfs_raid_types, which 5493e72ee88SQu Wenruo * can be used as index to access btrfs_raid_array[]. 5503e72ee88SQu Wenruo */ 5513e72ee88SQu Wenruo static inline enum btrfs_raid_types btrfs_bg_flags_to_raid_index(u64 flags) 5523e72ee88SQu Wenruo { 5533e72ee88SQu Wenruo if (flags & BTRFS_BLOCK_GROUP_RAID10) 5543e72ee88SQu Wenruo return BTRFS_RAID_RAID10; 5553e72ee88SQu Wenruo else if (flags & BTRFS_BLOCK_GROUP_RAID1) 5563e72ee88SQu Wenruo return BTRFS_RAID_RAID1; 5573e72ee88SQu Wenruo else if (flags & BTRFS_BLOCK_GROUP_DUP) 5583e72ee88SQu Wenruo return BTRFS_RAID_DUP; 5593e72ee88SQu Wenruo else if (flags & BTRFS_BLOCK_GROUP_RAID0) 5603e72ee88SQu Wenruo return BTRFS_RAID_RAID0; 5613e72ee88SQu Wenruo else if (flags & BTRFS_BLOCK_GROUP_RAID5) 5623e72ee88SQu Wenruo return BTRFS_RAID_RAID5; 5633e72ee88SQu Wenruo else if (flags & BTRFS_BLOCK_GROUP_RAID6) 5643e72ee88SQu Wenruo return BTRFS_RAID_RAID6; 5653e72ee88SQu Wenruo 5663e72ee88SQu Wenruo return BTRFS_RAID_SINGLE; /* BTRFS_BLOCK_GROUP_SINGLE */ 5673e72ee88SQu Wenruo } 5683e72ee88SQu Wenruo 569935e5cc9SMiao Xie void btrfs_update_commit_device_size(struct btrfs_fs_info *fs_info); 570e9b919b1SNikolay Borisov void btrfs_update_commit_device_bytes_used(struct btrfs_transaction *trans); 57104216820SFilipe Manana 572c73eccf7SAnand Jain struct list_head *btrfs_get_fs_uuids(void); 5735a13f430SAnand Jain void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info); 5745a13f430SAnand Jain void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info); 5756528b99dSAnand Jain bool btrfs_check_rw_degradable(struct btrfs_fs_info *fs_info, 5766528b99dSAnand Jain struct btrfs_device *failing_dev); 57721634a19SQu Wenruo 5780b86a832SChris Mason #endif 579