19888c340SDavid Sterba /* SPDX-License-Identifier: GPL-2.0 */ 20b86a832SChris Mason /* 30b86a832SChris Mason * Copyright (C) 2007 Oracle. All rights reserved. 40b86a832SChris Mason */ 50b86a832SChris Mason 69888c340SDavid Sterba #ifndef BTRFS_VOLUMES_H 79888c340SDavid Sterba #define BTRFS_VOLUMES_H 88790d502SChris Mason 9cea9e445SChris Mason #include <linux/bio.h> 10b2117a39SMiao Xie #include <linux/sort.h> 1155e301fdSFilipe Brandenburger #include <linux/btrfs.h> 128b712842SChris Mason #include "async-thread.h" 13cea9e445SChris Mason 14fce466eaSQu Wenruo #define BTRFS_MAX_DATA_CHUNK_SIZE (10ULL * SZ_1G) 15fce466eaSQu Wenruo 1667a2c45eSMiao Xie extern struct mutex uuid_mutex; 1767a2c45eSMiao Xie 18ee22184bSByongho Lee #define BTRFS_STRIPE_LEN SZ_64K 19b2117a39SMiao Xie 20f2984462SChris Mason struct buffer_head; 21ffbd517dSChris Mason struct btrfs_pending_bios { 22ffbd517dSChris Mason struct bio *head; 23ffbd517dSChris Mason struct bio *tail; 24ffbd517dSChris Mason }; 25ffbd517dSChris Mason 265f141126SNikolay Borisov struct btrfs_io_geometry { 275f141126SNikolay Borisov /* remaining bytes before crossing a stripe */ 285f141126SNikolay Borisov u64 len; 295f141126SNikolay Borisov /* offset of logical address in chunk */ 305f141126SNikolay Borisov u64 offset; 315f141126SNikolay Borisov /* length of single IO stripe */ 325f141126SNikolay Borisov u64 stripe_len; 335f141126SNikolay Borisov /* number of stripe where address falls */ 345f141126SNikolay Borisov u64 stripe_nr; 355f141126SNikolay Borisov /* offset of address in stripe */ 365f141126SNikolay Borisov u64 stripe_offset; 375f141126SNikolay Borisov /* offset of raid56 stripe into the chunk */ 385f141126SNikolay Borisov u64 raid56_stripe_offset; 395f141126SNikolay Borisov }; 405f141126SNikolay Borisov 417cc8e58dSMiao Xie /* 427cc8e58dSMiao Xie * Use sequence counter to get consistent device stat data on 437cc8e58dSMiao Xie * 32-bit processors. 447cc8e58dSMiao Xie */ 457cc8e58dSMiao Xie #if BITS_PER_LONG==32 && defined(CONFIG_SMP) 467cc8e58dSMiao Xie #include <linux/seqlock.h> 477cc8e58dSMiao Xie #define __BTRFS_NEED_DEVICE_DATA_ORDERED 487cc8e58dSMiao Xie #define btrfs_device_data_ordered_init(device) \ 497cc8e58dSMiao Xie seqcount_init(&device->data_seqcount) 507cc8e58dSMiao Xie #else 517cc8e58dSMiao Xie #define btrfs_device_data_ordered_init(device) do { } while (0) 527cc8e58dSMiao Xie #endif 537cc8e58dSMiao Xie 54ebbede42SAnand Jain #define BTRFS_DEV_STATE_WRITEABLE (0) 55e12c9621SAnand Jain #define BTRFS_DEV_STATE_IN_FS_METADATA (1) 56e6e674bdSAnand Jain #define BTRFS_DEV_STATE_MISSING (2) 57401e29c1SAnand Jain #define BTRFS_DEV_STATE_REPLACE_TGT (3) 581c3063b6SAnand Jain #define BTRFS_DEV_STATE_FLUSH_SENT (4) 59ebbede42SAnand Jain 600b86a832SChris Mason struct btrfs_device { 610b6f5d40SNikolay Borisov struct list_head dev_list; /* device_list_mutex */ 620b6f5d40SNikolay Borisov struct list_head dev_alloc_list; /* chunk mutex */ 63bbbf7243SNikolay Borisov struct list_head post_commit_list; /* chunk mutex */ 642b82032cSYan Zheng struct btrfs_fs_devices *fs_devices; 65fb456252SJeff Mahoney struct btrfs_fs_info *fs_info; 66ffbd517dSChris Mason 67d5ee37bcSMiao Xie struct rcu_string *name; 68d5ee37bcSMiao Xie 69d5ee37bcSMiao Xie u64 generation; 70d5ee37bcSMiao Xie 71d5ee37bcSMiao Xie spinlock_t io_lock ____cacheline_aligned; 72d5ee37bcSMiao Xie int running_pending; 73ffbd517dSChris Mason /* regular prio bios */ 74ffbd517dSChris Mason struct btrfs_pending_bios pending_bios; 7570fd7614SChristoph Hellwig /* sync bios */ 76ffbd517dSChris Mason struct btrfs_pending_bios pending_sync_bios; 77ffbd517dSChris Mason 78d5ee37bcSMiao Xie struct block_device *bdev; 79d5ee37bcSMiao Xie 80d5ee37bcSMiao Xie /* the mode sent to blkdev_get */ 81d5ee37bcSMiao Xie fmode_t mode; 82d5ee37bcSMiao Xie 83ebbede42SAnand Jain unsigned long dev_state; 8458efbc9fSOmar Sandoval blk_status_t last_flush_error; 85b3075717SChris Mason 867cc8e58dSMiao Xie #ifdef __BTRFS_NEED_DEVICE_DATA_ORDERED 877cc8e58dSMiao Xie seqcount_t data_seqcount; 887cc8e58dSMiao Xie #endif 897cc8e58dSMiao Xie 900b86a832SChris Mason /* the internal btrfs device id */ 910b86a832SChris Mason u64 devid; 920b86a832SChris Mason 936ba40b61SMiao Xie /* size of the device in memory */ 940b86a832SChris Mason u64 total_bytes; 950b86a832SChris Mason 966ba40b61SMiao Xie /* size of the device on disk */ 97d6397baeSChris Ball u64 disk_total_bytes; 98d6397baeSChris Ball 990b86a832SChris Mason /* bytes used */ 1000b86a832SChris Mason u64 bytes_used; 1010b86a832SChris Mason 1020b86a832SChris Mason /* optimal io alignment for this device */ 1030b86a832SChris Mason u32 io_align; 1040b86a832SChris Mason 1050b86a832SChris Mason /* optimal io width for this device */ 1060b86a832SChris Mason u32 io_width; 1073c45bfc1SDulshani Gunawardhana /* type and info about this device */ 1083c45bfc1SDulshani Gunawardhana u64 type; 1090b86a832SChris Mason 1100b86a832SChris Mason /* minimal io size for this device */ 1110b86a832SChris Mason u32 sector_size; 1120b86a832SChris Mason 1130b86a832SChris Mason /* physical drive uuid (or lvm uuid) */ 114e17cade2SChris Mason u8 uuid[BTRFS_UUID_SIZE]; 1158b712842SChris Mason 116935e5cc9SMiao Xie /* 117935e5cc9SMiao Xie * size of the device on the current transaction 118935e5cc9SMiao Xie * 119935e5cc9SMiao Xie * This variant is update when committing the transaction, 120bbbf7243SNikolay Borisov * and protected by chunk mutex 121935e5cc9SMiao Xie */ 122935e5cc9SMiao Xie u64 commit_total_bytes; 123935e5cc9SMiao Xie 124ce7213c7SMiao Xie /* bytes used on the current transaction */ 125ce7213c7SMiao Xie u64 commit_bytes_used; 126935e5cc9SMiao Xie 1273c45bfc1SDulshani Gunawardhana /* for sending down flush barriers */ 1283c45bfc1SDulshani Gunawardhana struct bio *flush_bio; 1293c45bfc1SDulshani Gunawardhana struct completion flush_wait; 1303c45bfc1SDulshani Gunawardhana 131a2de733cSArne Jansen /* per-device scrub information */ 132cadbc0a0SAnand Jain struct scrub_ctx *scrub_ctx; 133a2de733cSArne Jansen 134d458b054SQu Wenruo struct btrfs_work work; 13590519d66SArne Jansen 13690519d66SArne Jansen /* readahead state */ 13790519d66SArne Jansen atomic_t reada_in_flight; 13890519d66SArne Jansen u64 reada_next; 13990519d66SArne Jansen struct reada_zone *reada_curr_zone; 14090519d66SArne Jansen struct radix_tree_root reada_zones; 14190519d66SArne Jansen struct radix_tree_root reada_extents; 142387125fcSChris Mason 143442a4f63SStefan Behrens /* disk I/O failure stats. For detailed description refer to 144442a4f63SStefan Behrens * enum btrfs_dev_stat_values in ioctl.h */ 145733f4fbbSStefan Behrens int dev_stats_valid; 146addc3fa7SMiao Xie 147addc3fa7SMiao Xie /* Counter to record the change of device stats */ 148addc3fa7SMiao Xie atomic_t dev_stats_ccnt; 149442a4f63SStefan Behrens atomic_t dev_stat_values[BTRFS_DEV_STAT_VALUES_MAX]; 1501c11b63eSJeff Mahoney 1511c11b63eSJeff Mahoney struct extent_io_tree alloc_state; 1520b86a832SChris Mason }; 1530b86a832SChris Mason 1547cc8e58dSMiao Xie /* 1557cc8e58dSMiao Xie * If we read those variants at the context of their own lock, we needn't 1567cc8e58dSMiao Xie * use the following helpers, reading them directly is safe. 1577cc8e58dSMiao Xie */ 1587cc8e58dSMiao Xie #if BITS_PER_LONG==32 && defined(CONFIG_SMP) 1597cc8e58dSMiao Xie #define BTRFS_DEVICE_GETSET_FUNCS(name) \ 1607cc8e58dSMiao Xie static inline u64 \ 1617cc8e58dSMiao Xie btrfs_device_get_##name(const struct btrfs_device *dev) \ 1627cc8e58dSMiao Xie { \ 1637cc8e58dSMiao Xie u64 size; \ 1647cc8e58dSMiao Xie unsigned int seq; \ 1657cc8e58dSMiao Xie \ 1667cc8e58dSMiao Xie do { \ 1677cc8e58dSMiao Xie seq = read_seqcount_begin(&dev->data_seqcount); \ 1687cc8e58dSMiao Xie size = dev->name; \ 1697cc8e58dSMiao Xie } while (read_seqcount_retry(&dev->data_seqcount, seq)); \ 1707cc8e58dSMiao Xie return size; \ 1717cc8e58dSMiao Xie } \ 1727cc8e58dSMiao Xie \ 1737cc8e58dSMiao Xie static inline void \ 1747cc8e58dSMiao Xie btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ 1757cc8e58dSMiao Xie { \ 1767cc8e58dSMiao Xie preempt_disable(); \ 1777cc8e58dSMiao Xie write_seqcount_begin(&dev->data_seqcount); \ 1787cc8e58dSMiao Xie dev->name = size; \ 1797cc8e58dSMiao Xie write_seqcount_end(&dev->data_seqcount); \ 1807cc8e58dSMiao Xie preempt_enable(); \ 1817cc8e58dSMiao Xie } 1827cc8e58dSMiao Xie #elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPT) 1837cc8e58dSMiao Xie #define BTRFS_DEVICE_GETSET_FUNCS(name) \ 1847cc8e58dSMiao Xie static inline u64 \ 1857cc8e58dSMiao Xie btrfs_device_get_##name(const struct btrfs_device *dev) \ 1867cc8e58dSMiao Xie { \ 1877cc8e58dSMiao Xie u64 size; \ 1887cc8e58dSMiao Xie \ 1897cc8e58dSMiao Xie preempt_disable(); \ 1907cc8e58dSMiao Xie size = dev->name; \ 1917cc8e58dSMiao Xie preempt_enable(); \ 1927cc8e58dSMiao Xie return size; \ 1937cc8e58dSMiao Xie } \ 1947cc8e58dSMiao Xie \ 1957cc8e58dSMiao Xie static inline void \ 1967cc8e58dSMiao Xie btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ 1977cc8e58dSMiao Xie { \ 1987cc8e58dSMiao Xie preempt_disable(); \ 1997cc8e58dSMiao Xie dev->name = size; \ 2007cc8e58dSMiao Xie preempt_enable(); \ 2017cc8e58dSMiao Xie } 2027cc8e58dSMiao Xie #else 2037cc8e58dSMiao Xie #define BTRFS_DEVICE_GETSET_FUNCS(name) \ 2047cc8e58dSMiao Xie static inline u64 \ 2057cc8e58dSMiao Xie btrfs_device_get_##name(const struct btrfs_device *dev) \ 2067cc8e58dSMiao Xie { \ 2077cc8e58dSMiao Xie return dev->name; \ 2087cc8e58dSMiao Xie } \ 2097cc8e58dSMiao Xie \ 2107cc8e58dSMiao Xie static inline void \ 2117cc8e58dSMiao Xie btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ 2127cc8e58dSMiao Xie { \ 2137cc8e58dSMiao Xie dev->name = size; \ 2147cc8e58dSMiao Xie } 2157cc8e58dSMiao Xie #endif 2167cc8e58dSMiao Xie 2177cc8e58dSMiao Xie BTRFS_DEVICE_GETSET_FUNCS(total_bytes); 2187cc8e58dSMiao Xie BTRFS_DEVICE_GETSET_FUNCS(disk_total_bytes); 2197cc8e58dSMiao Xie BTRFS_DEVICE_GETSET_FUNCS(bytes_used); 2207cc8e58dSMiao Xie 2218a4b83ccSChris Mason struct btrfs_fs_devices { 2228a4b83ccSChris Mason u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 2237239ff4bSNikolay Borisov u8 metadata_uuid[BTRFS_FSID_SIZE]; 224d1a63002SNikolay Borisov bool fsid_change; 225c4babc5eSAnand Jain struct list_head fs_list; 2268a4b83ccSChris Mason 2278a4b83ccSChris Mason u64 num_devices; 228a0af469bSChris Mason u64 open_devices; 2292b82032cSYan Zheng u64 rw_devices; 230cd02dca5SChris Mason u64 missing_devices; 2312b82032cSYan Zheng u64 total_rw_bytes; 23202db0844SJosef Bacik u64 total_devices; 233d1a63002SNikolay Borisov 234d1a63002SNikolay Borisov /* Highest generation number of seen devices */ 235d1a63002SNikolay Borisov u64 latest_generation; 236d1a63002SNikolay Borisov 2378a4b83ccSChris Mason struct block_device *latest_bdev; 238e5e9a520SChris Mason 239e5e9a520SChris Mason /* all of the devices in the FS, protected by a mutex 240e5e9a520SChris Mason * so we can safely walk it to write out the supers without 2419b011adfSWang Shilong * worrying about add/remove by the multi-device code. 2429b011adfSWang Shilong * Scrubbing super can kick off supers writing by holding 2439b011adfSWang Shilong * this mutex lock. 244e5e9a520SChris Mason */ 245e5e9a520SChris Mason struct mutex device_list_mutex; 2460b6f5d40SNikolay Borisov 2470b6f5d40SNikolay Borisov /* List of all devices, protected by device_list_mutex */ 2488a4b83ccSChris Mason struct list_head devices; 249b3075717SChris Mason 2500b6f5d40SNikolay Borisov /* 2510b6f5d40SNikolay Borisov * Devices which can satisfy space allocation. Protected by 2520b6f5d40SNikolay Borisov * chunk_mutex 2530b6f5d40SNikolay Borisov */ 254b3075717SChris Mason struct list_head alloc_list; 2552b82032cSYan Zheng 2562b82032cSYan Zheng struct btrfs_fs_devices *seed; 2572b82032cSYan Zheng int seeding; 2582b82032cSYan Zheng 2592b82032cSYan Zheng int opened; 260c289811cSChris Mason 261c289811cSChris Mason /* set when we find or add a device that doesn't have the 262c289811cSChris Mason * nonrot flag set 263c289811cSChris Mason */ 264c289811cSChris Mason int rotating; 2652e7910d6SAnand Jain 2665a13f430SAnand Jain struct btrfs_fs_info *fs_info; 2672e7910d6SAnand Jain /* sysfs kobjects */ 268c1b7e474SAnand Jain struct kobject fsid_kobj; 2692e7910d6SAnand Jain struct kobject *device_dir_kobj; 2702e7910d6SAnand Jain struct completion kobj_unregister; 2718a4b83ccSChris Mason }; 2728a4b83ccSChris Mason 273facc8a22SMiao Xie #define BTRFS_BIO_INLINE_CSUM_SIZE 64 274facc8a22SMiao Xie 275ab4ba2e1SQu Wenruo #define BTRFS_MAX_DEVS(info) ((BTRFS_MAX_ITEM_SIZE(info) \ 276ab4ba2e1SQu Wenruo - sizeof(struct btrfs_chunk)) \ 277ab4ba2e1SQu Wenruo / sizeof(struct btrfs_stripe) + 1) 278ab4ba2e1SQu Wenruo 279ab4ba2e1SQu Wenruo #define BTRFS_MAX_DEVS_SYS_CHUNK ((BTRFS_SYSTEM_CHUNK_ARRAY_SIZE \ 280ab4ba2e1SQu Wenruo - 2 * sizeof(struct btrfs_disk_key) \ 281ab4ba2e1SQu Wenruo - 2 * sizeof(struct btrfs_chunk)) \ 282ab4ba2e1SQu Wenruo / sizeof(struct btrfs_stripe) + 1) 283ab4ba2e1SQu Wenruo 2849be3395bSChris Mason /* 2859be3395bSChris Mason * we need the mirror number and stripe index to be passed around 2869be3395bSChris Mason * the call chain while we are processing end_io (especially errors). 2879be3395bSChris Mason * Really, what we need is a btrfs_bio structure that has this info 2889be3395bSChris Mason * and is properly sized with its stripe array, but we're not there 2899be3395bSChris Mason * quite yet. We have our own btrfs bioset, and all of the bios 2909be3395bSChris Mason * we allocate are actually btrfs_io_bios. We'll cram as much of 2919be3395bSChris Mason * struct btrfs_bio as we can into this over time. 2929be3395bSChris Mason */ 2939be3395bSChris Mason struct btrfs_io_bio { 294c1dc0896SMiao Xie unsigned int mirror_num; 295c1dc0896SMiao Xie unsigned int stripe_index; 296c1dc0896SMiao Xie u64 logical; 297facc8a22SMiao Xie u8 *csum; 298facc8a22SMiao Xie u8 csum_inline[BTRFS_BIO_INLINE_CSUM_SIZE]; 29917347cecSLiu Bo struct bvec_iter iter; 300fa1bcbe0SDavid Sterba /* 301fa1bcbe0SDavid Sterba * This member must come last, bio_alloc_bioset will allocate enough 302fa1bcbe0SDavid Sterba * bytes for entire btrfs_io_bio but relies on bio being last. 303fa1bcbe0SDavid Sterba */ 3049be3395bSChris Mason struct bio bio; 3059be3395bSChris Mason }; 3069be3395bSChris Mason 3079be3395bSChris Mason static inline struct btrfs_io_bio *btrfs_io_bio(struct bio *bio) 3089be3395bSChris Mason { 3099be3395bSChris Mason return container_of(bio, struct btrfs_io_bio, bio); 3109be3395bSChris Mason } 3119be3395bSChris Mason 312b3a0dd50SDavid Sterba static inline void btrfs_io_bio_free_csum(struct btrfs_io_bio *io_bio) 313b3a0dd50SDavid Sterba { 314b3a0dd50SDavid Sterba if (io_bio->csum != io_bio->csum_inline) { 315b3a0dd50SDavid Sterba kfree(io_bio->csum); 316b3a0dd50SDavid Sterba io_bio->csum = NULL; 317b3a0dd50SDavid Sterba } 318b3a0dd50SDavid Sterba } 319b3a0dd50SDavid Sterba 320cea9e445SChris Mason struct btrfs_bio_stripe { 321cea9e445SChris Mason struct btrfs_device *dev; 322cea9e445SChris Mason u64 physical; 323fce3bb9aSLi Dongyang u64 length; /* only used for discard mappings */ 324cea9e445SChris Mason }; 325cea9e445SChris Mason 326a1d3c478SJan Schmidt struct btrfs_bio { 327140475aeSElena Reshetova refcount_t refs; 328cea9e445SChris Mason atomic_t stripes_pending; 329c404e0dcSMiao Xie struct btrfs_fs_info *fs_info; 33010f11900SZhao Lei u64 map_type; /* get from map_lookup->type */ 331cea9e445SChris Mason bio_end_io_t *end_io; 3327d2b4daaSChris Mason struct bio *orig_bio; 333c55f1396SMiao Xie unsigned long flags; 334cea9e445SChris Mason void *private; 335a236aed1SChris Mason atomic_t error; 336a236aed1SChris Mason int max_errors; 337cea9e445SChris Mason int num_stripes; 338a1d3c478SJan Schmidt int mirror_num; 3392c8cdd6eSMiao Xie int num_tgtdevs; 3402c8cdd6eSMiao Xie int *tgtdev_map; 3418e5cfb55SZhao Lei /* 3428e5cfb55SZhao Lei * logical block numbers for the start of each stripe 3438e5cfb55SZhao Lei * The last one or two are p/q. These are sorted, 3448e5cfb55SZhao Lei * so raid_map[0] is the start of our full stripe 3458e5cfb55SZhao Lei */ 3468e5cfb55SZhao Lei u64 *raid_map; 347cea9e445SChris Mason struct btrfs_bio_stripe stripes[]; 348cea9e445SChris Mason }; 349cea9e445SChris Mason 350b2117a39SMiao Xie struct btrfs_device_info { 351b2117a39SMiao Xie struct btrfs_device *dev; 352b2117a39SMiao Xie u64 dev_offset; 353b2117a39SMiao Xie u64 max_avail; 35473c5de00SArne Jansen u64 total_avail; 355b2117a39SMiao Xie }; 356b2117a39SMiao Xie 35731e50229SLiu Bo struct btrfs_raid_attr { 3588c3e3582SDavid Sterba u8 sub_stripes; /* sub_stripes info for map */ 3598c3e3582SDavid Sterba u8 dev_stripes; /* stripes per dev */ 3608c3e3582SDavid Sterba u8 devs_max; /* max devs to use */ 3618c3e3582SDavid Sterba u8 devs_min; /* min devs needed */ 3628c3e3582SDavid Sterba u8 tolerated_failures; /* max tolerated fail devs */ 3638c3e3582SDavid Sterba u8 devs_increment; /* ndevs has to be a multiple of this */ 3648c3e3582SDavid Sterba u8 ncopies; /* how many copies to data has */ 3658c3e3582SDavid Sterba u8 nparity; /* number of stripes worth of bytes to store 366b50836edSHans van Kranenburg * parity information */ 3678c3e3582SDavid Sterba u8 mindev_error; /* error code if min devs requisite is unmet */ 368ed23467bSAnand Jain const char raid_name[8]; /* name of the raid */ 36941a6e891SAnand Jain u64 bg_flag; /* block group flag of the raid */ 37031e50229SLiu Bo }; 37131e50229SLiu Bo 372af902047SZhao Lei extern const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES]; 373af902047SZhao Lei 3741abe9b8aSliubo struct map_lookup { 3751abe9b8aSliubo u64 type; 3761abe9b8aSliubo int io_align; 3771abe9b8aSliubo int io_width; 3783d8da678SLiu Bo u64 stripe_len; 3791abe9b8aSliubo int num_stripes; 3801abe9b8aSliubo int sub_stripes; 381cf90d884SQu Wenruo int verified_stripes; /* For mount time dev extent verification */ 3821abe9b8aSliubo struct btrfs_bio_stripe stripes[]; 3831abe9b8aSliubo }; 3841abe9b8aSliubo 385a2de733cSArne Jansen #define map_lookup_size(n) (sizeof(struct map_lookup) + \ 386a2de733cSArne Jansen (sizeof(struct btrfs_bio_stripe) * (n))) 387a2de733cSArne Jansen 388c9e9f97bSIlya Dryomov struct btrfs_balance_args; 38919a39dceSIlya Dryomov struct btrfs_balance_progress; 390c9e9f97bSIlya Dryomov struct btrfs_balance_control { 391c9e9f97bSIlya Dryomov struct btrfs_balance_args data; 392c9e9f97bSIlya Dryomov struct btrfs_balance_args meta; 393c9e9f97bSIlya Dryomov struct btrfs_balance_args sys; 394c9e9f97bSIlya Dryomov 395c9e9f97bSIlya Dryomov u64 flags; 39619a39dceSIlya Dryomov 39719a39dceSIlya Dryomov struct btrfs_balance_progress stat; 398c9e9f97bSIlya Dryomov }; 399c9e9f97bSIlya Dryomov 400cf8cddd3SChristoph Hellwig enum btrfs_map_op { 401cf8cddd3SChristoph Hellwig BTRFS_MAP_READ, 402cf8cddd3SChristoph Hellwig BTRFS_MAP_WRITE, 403cf8cddd3SChristoph Hellwig BTRFS_MAP_DISCARD, 404cf8cddd3SChristoph Hellwig BTRFS_MAP_GET_READ_MIRRORS, 405cf8cddd3SChristoph Hellwig }; 406cf8cddd3SChristoph Hellwig 407cf8cddd3SChristoph Hellwig static inline enum btrfs_map_op btrfs_op(struct bio *bio) 408cf8cddd3SChristoph Hellwig { 409cf8cddd3SChristoph Hellwig switch (bio_op(bio)) { 410cf8cddd3SChristoph Hellwig case REQ_OP_DISCARD: 411cf8cddd3SChristoph Hellwig return BTRFS_MAP_DISCARD; 412cf8cddd3SChristoph Hellwig case REQ_OP_WRITE: 413cf8cddd3SChristoph Hellwig return BTRFS_MAP_WRITE; 414cf8cddd3SChristoph Hellwig default: 415cf8cddd3SChristoph Hellwig WARN_ON_ONCE(1); 4160a4c9265SGustavo A. R. Silva /* fall through */ 417cf8cddd3SChristoph Hellwig case REQ_OP_READ: 418cf8cddd3SChristoph Hellwig return BTRFS_MAP_READ; 419cf8cddd3SChristoph Hellwig } 420cf8cddd3SChristoph Hellwig } 421cf8cddd3SChristoph Hellwig 4226e9606d2SZhao Lei void btrfs_get_bbio(struct btrfs_bio *bbio); 4236e9606d2SZhao Lei void btrfs_put_bbio(struct btrfs_bio *bbio); 424cf8cddd3SChristoph Hellwig int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, 425cea9e445SChris Mason u64 logical, u64 *length, 426a1d3c478SJan Schmidt struct btrfs_bio **bbio_ret, int mirror_num); 427cf8cddd3SChristoph Hellwig int btrfs_map_sblock(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, 428af8e2d1dSMiao Xie u64 logical, u64 *length, 429825ad4c9SDavid Sterba struct btrfs_bio **bbio_ret); 4305f141126SNikolay Borisov int btrfs_get_io_geometry(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, 4315f141126SNikolay Borisov u64 logical, u64 len, struct btrfs_io_geometry *io_geom); 43263a9c7b9SNikolay Borisov int btrfs_rmap_block(struct btrfs_fs_info *fs_info, u64 chunk_start, 43363a9c7b9SNikolay Borisov u64 physical, u64 **logical, int *naddrs, int *stripe_len); 4346bccf3abSJeff Mahoney int btrfs_read_sys_array(struct btrfs_fs_info *fs_info); 4355b4aacefSJeff Mahoney int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info); 436c216b203SNikolay Borisov int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, u64 type); 437c8bf1b67SDavid Sterba void btrfs_mapping_tree_free(struct extent_map_tree *tree); 43858efbc9fSOmar Sandoval blk_status_t btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio, 43908635baeSChris Mason int mirror_num); 4408a4b83ccSChris Mason int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, 44197288f2cSChristoph Hellwig fmode_t flags, void *holder); 44236350e95SGu Jinxiang struct btrfs_device *btrfs_scan_one_device(const char *path, 44336350e95SGu Jinxiang fmode_t flags, void *holder); 444228a73abSAnand Jain int btrfs_forget_devices(const char *path); 4458a4b83ccSChris Mason int btrfs_close_devices(struct btrfs_fs_devices *fs_devices); 4469b99b115SAnand Jain void btrfs_free_extra_devids(struct btrfs_fs_devices *fs_devices, int step); 447d6507cf1SNikolay Borisov void btrfs_assign_next_active_device(struct btrfs_device *device, 448d6507cf1SNikolay Borisov struct btrfs_device *this_dev); 449a27a94c2SNikolay Borisov struct btrfs_device *btrfs_find_device_by_devspec(struct btrfs_fs_info *fs_info, 450a27a94c2SNikolay Borisov u64 devid, 451a27a94c2SNikolay Borisov const char *devpath); 45212bd2fc0SIlya Dryomov struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info, 45312bd2fc0SIlya Dryomov const u64 *devid, 45412bd2fc0SIlya Dryomov const u8 *uuid); 455a425f9d4SDavid Sterba void btrfs_free_device(struct btrfs_device *device); 4562ff7e61eSJeff Mahoney int btrfs_rm_device(struct btrfs_fs_info *fs_info, 457da353f6bSDavid Sterba const char *device_path, u64 devid); 458ffc5a379SDavid Sterba void __exit btrfs_cleanup_fs_uuids(void); 4595d964051SStefan Behrens int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len); 4608f18cf13SChris Mason int btrfs_grow_device(struct btrfs_trans_handle *trans, 4618f18cf13SChris Mason struct btrfs_device *device, u64 new_size); 462e4319cd9SAnand Jain struct btrfs_device *btrfs_find_device(struct btrfs_fs_devices *fs_devices, 46309ba3bc9SAnand Jain u64 devid, u8 *uuid, u8 *fsid, bool seed); 4648f18cf13SChris Mason int btrfs_shrink_device(struct btrfs_device *device, u64 new_size); 465da353f6bSDavid Sterba int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *path); 4666fcf6e2bSDavid Sterba int btrfs_balance(struct btrfs_fs_info *fs_info, 4676fcf6e2bSDavid Sterba struct btrfs_balance_control *bctl, 468c9e9f97bSIlya Dryomov struct btrfs_ioctl_balance_args *bargs); 469f89e09cfSAnand Jain void btrfs_describe_block_groups(u64 flags, char *buf, u32 size_buf); 4702b6ba629SIlya Dryomov int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info); 47168310a5eSIlya Dryomov int btrfs_recover_balance(struct btrfs_fs_info *fs_info); 472837d5b6eSIlya Dryomov int btrfs_pause_balance(struct btrfs_fs_info *fs_info); 473a7e99c69SIlya Dryomov int btrfs_cancel_balance(struct btrfs_fs_info *fs_info); 474f7a81ea4SStefan Behrens int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info); 47570f80175SStefan Behrens int btrfs_check_uuid_tree(struct btrfs_fs_info *fs_info); 4762ff7e61eSJeff Mahoney int btrfs_chunk_readonly(struct btrfs_fs_info *fs_info, u64 chunk_offset); 47760dfdf25SNikolay Borisov int find_free_dev_extent(struct btrfs_device *device, u64 num_bytes, 478ba1bf481SJosef Bacik u64 *start, u64 *max_avail); 479442a4f63SStefan Behrens void btrfs_dev_stat_inc_and_print(struct btrfs_device *dev, int index); 4802ff7e61eSJeff Mahoney int btrfs_get_dev_stats(struct btrfs_fs_info *fs_info, 481b27f7c0cSDavid Sterba struct btrfs_ioctl_get_dev_stats *stats); 482cb517eabSMiao Xie void btrfs_init_devices_late(struct btrfs_fs_info *fs_info); 483733f4fbbSStefan Behrens int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info); 484196c9d8dSDavid Sterba int btrfs_run_dev_stats(struct btrfs_trans_handle *trans); 48568a9db5fSNikolay Borisov void btrfs_rm_dev_replace_remove_srcdev(struct btrfs_device *srcdev); 48665237ee3SDavid Sterba void btrfs_rm_dev_replace_free_srcdev(struct btrfs_device *srcdev); 4874f5ad7bdSNikolay Borisov void btrfs_destroy_dev_replace_tgtdev(struct btrfs_device *tgtdev); 488da353f6bSDavid Sterba void btrfs_scratch_superblocks(struct block_device *bdev, const char *device_path); 489592d92eeSLiu Bo int btrfs_is_parity_mirror(struct btrfs_fs_info *fs_info, 490e4ff5fb5SNikolay Borisov u64 logical, u64 len); 4912ff7e61eSJeff Mahoney unsigned long btrfs_full_stripe_len(struct btrfs_fs_info *fs_info, 49253b381b3SDavid Woodhouse u64 logical); 4936df9a95eSJosef Bacik int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans, 4946df9a95eSJosef Bacik u64 chunk_offset, u64 chunk_size); 49597aff912SNikolay Borisov int btrfs_remove_chunk(struct btrfs_trans_handle *trans, u64 chunk_offset); 49660ca842eSOmar Sandoval struct extent_map *btrfs_get_chunk_map(struct btrfs_fs_info *fs_info, 49760ca842eSOmar Sandoval u64 logical, u64 length); 498addc3fa7SMiao Xie 499442a4f63SStefan Behrens static inline void btrfs_dev_stat_inc(struct btrfs_device *dev, 500442a4f63SStefan Behrens int index) 501442a4f63SStefan Behrens { 502442a4f63SStefan Behrens atomic_inc(dev->dev_stat_values + index); 5039deae968SNikolay Borisov /* 5049deae968SNikolay Borisov * This memory barrier orders stores updating statistics before stores 5059deae968SNikolay Borisov * updating dev_stats_ccnt. 5069deae968SNikolay Borisov * 5079deae968SNikolay Borisov * It pairs with smp_rmb() in btrfs_run_dev_stats(). 5089deae968SNikolay Borisov */ 509addc3fa7SMiao Xie smp_mb__before_atomic(); 510addc3fa7SMiao Xie atomic_inc(&dev->dev_stats_ccnt); 511442a4f63SStefan Behrens } 512442a4f63SStefan Behrens 513442a4f63SStefan Behrens static inline int btrfs_dev_stat_read(struct btrfs_device *dev, 514442a4f63SStefan Behrens int index) 515442a4f63SStefan Behrens { 516442a4f63SStefan Behrens return atomic_read(dev->dev_stat_values + index); 517442a4f63SStefan Behrens } 518442a4f63SStefan Behrens 519442a4f63SStefan Behrens static inline int btrfs_dev_stat_read_and_reset(struct btrfs_device *dev, 520442a4f63SStefan Behrens int index) 521442a4f63SStefan Behrens { 522442a4f63SStefan Behrens int ret; 523442a4f63SStefan Behrens 524442a4f63SStefan Behrens ret = atomic_xchg(dev->dev_stat_values + index, 0); 5254660c49fSNikolay Borisov /* 5264660c49fSNikolay Borisov * atomic_xchg implies a full memory barriers as per atomic_t.txt: 5274660c49fSNikolay Borisov * - RMW operations that have a return value are fully ordered; 5284660c49fSNikolay Borisov * 5294660c49fSNikolay Borisov * This implicit memory barriers is paired with the smp_rmb in 5304660c49fSNikolay Borisov * btrfs_run_dev_stats 5314660c49fSNikolay Borisov */ 532addc3fa7SMiao Xie atomic_inc(&dev->dev_stats_ccnt); 533442a4f63SStefan Behrens return ret; 534442a4f63SStefan Behrens } 535442a4f63SStefan Behrens 536442a4f63SStefan Behrens static inline void btrfs_dev_stat_set(struct btrfs_device *dev, 537442a4f63SStefan Behrens int index, unsigned long val) 538442a4f63SStefan Behrens { 539442a4f63SStefan Behrens atomic_set(dev->dev_stat_values + index, val); 5409deae968SNikolay Borisov /* 5419deae968SNikolay Borisov * This memory barrier orders stores updating statistics before stores 5429deae968SNikolay Borisov * updating dev_stats_ccnt. 5439deae968SNikolay Borisov * 5449deae968SNikolay Borisov * It pairs with smp_rmb() in btrfs_run_dev_stats(). 5459deae968SNikolay Borisov */ 546addc3fa7SMiao Xie smp_mb__before_atomic(); 547addc3fa7SMiao Xie atomic_inc(&dev->dev_stats_ccnt); 548442a4f63SStefan Behrens } 549442a4f63SStefan Behrens 5503e72ee88SQu Wenruo /* 5513e72ee88SQu Wenruo * Convert block group flags (BTRFS_BLOCK_GROUP_*) to btrfs_raid_types, which 5523e72ee88SQu Wenruo * can be used as index to access btrfs_raid_array[]. 5533e72ee88SQu Wenruo */ 5543e72ee88SQu Wenruo static inline enum btrfs_raid_types btrfs_bg_flags_to_raid_index(u64 flags) 5553e72ee88SQu Wenruo { 5563e72ee88SQu Wenruo if (flags & BTRFS_BLOCK_GROUP_RAID10) 5573e72ee88SQu Wenruo return BTRFS_RAID_RAID10; 5583e72ee88SQu Wenruo else if (flags & BTRFS_BLOCK_GROUP_RAID1) 5593e72ee88SQu Wenruo return BTRFS_RAID_RAID1; 5603e72ee88SQu Wenruo else if (flags & BTRFS_BLOCK_GROUP_DUP) 5613e72ee88SQu Wenruo return BTRFS_RAID_DUP; 5623e72ee88SQu Wenruo else if (flags & BTRFS_BLOCK_GROUP_RAID0) 5633e72ee88SQu Wenruo return BTRFS_RAID_RAID0; 5643e72ee88SQu Wenruo else if (flags & BTRFS_BLOCK_GROUP_RAID5) 5653e72ee88SQu Wenruo return BTRFS_RAID_RAID5; 5663e72ee88SQu Wenruo else if (flags & BTRFS_BLOCK_GROUP_RAID6) 5673e72ee88SQu Wenruo return BTRFS_RAID_RAID6; 5683e72ee88SQu Wenruo 5693e72ee88SQu Wenruo return BTRFS_RAID_SINGLE; /* BTRFS_BLOCK_GROUP_SINGLE */ 5703e72ee88SQu Wenruo } 5713e72ee88SQu Wenruo 572bbbf7243SNikolay Borisov void btrfs_commit_device_sizes(struct btrfs_transaction *trans); 57304216820SFilipe Manana 5744143cb8bSDavid Sterba struct list_head * __attribute_const__ btrfs_get_fs_uuids(void); 5755a13f430SAnand Jain void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info); 5765a13f430SAnand Jain void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info); 5776528b99dSAnand Jain bool btrfs_check_rw_degradable(struct btrfs_fs_info *fs_info, 5786528b99dSAnand Jain struct btrfs_device *failing_dev); 57921634a19SQu Wenruo 58046df06b8SDavid Sterba int btrfs_bg_type_to_factor(u64 flags); 581158da513SDavid Sterba const char *btrfs_bg_type_to_raid_name(u64 flags); 582cf90d884SQu Wenruo int btrfs_verify_dev_extents(struct btrfs_fs_info *fs_info); 58346df06b8SDavid Sterba 5840b86a832SChris Mason #endif 585