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 205f141126SNikolay Borisov struct btrfs_io_geometry { 215f141126SNikolay Borisov /* remaining bytes before crossing a stripe */ 225f141126SNikolay Borisov u64 len; 235f141126SNikolay Borisov /* offset of logical address in chunk */ 245f141126SNikolay Borisov u64 offset; 255f141126SNikolay Borisov /* length of single IO stripe */ 265f141126SNikolay Borisov u64 stripe_len; 275f141126SNikolay Borisov /* number of stripe where address falls */ 285f141126SNikolay Borisov u64 stripe_nr; 295f141126SNikolay Borisov /* offset of address in stripe */ 305f141126SNikolay Borisov u64 stripe_offset; 315f141126SNikolay Borisov /* offset of raid56 stripe into the chunk */ 325f141126SNikolay Borisov u64 raid56_stripe_offset; 335f141126SNikolay Borisov }; 345f141126SNikolay Borisov 357cc8e58dSMiao Xie /* 367cc8e58dSMiao Xie * Use sequence counter to get consistent device stat data on 377cc8e58dSMiao Xie * 32-bit processors. 387cc8e58dSMiao Xie */ 397cc8e58dSMiao Xie #if BITS_PER_LONG==32 && defined(CONFIG_SMP) 407cc8e58dSMiao Xie #include <linux/seqlock.h> 417cc8e58dSMiao Xie #define __BTRFS_NEED_DEVICE_DATA_ORDERED 427cc8e58dSMiao Xie #define btrfs_device_data_ordered_init(device) \ 437cc8e58dSMiao Xie seqcount_init(&device->data_seqcount) 447cc8e58dSMiao Xie #else 457cc8e58dSMiao Xie #define btrfs_device_data_ordered_init(device) do { } while (0) 467cc8e58dSMiao Xie #endif 477cc8e58dSMiao Xie 48ebbede42SAnand Jain #define BTRFS_DEV_STATE_WRITEABLE (0) 49e12c9621SAnand Jain #define BTRFS_DEV_STATE_IN_FS_METADATA (1) 50e6e674bdSAnand Jain #define BTRFS_DEV_STATE_MISSING (2) 51401e29c1SAnand Jain #define BTRFS_DEV_STATE_REPLACE_TGT (3) 521c3063b6SAnand Jain #define BTRFS_DEV_STATE_FLUSH_SENT (4) 5366d204a1SFilipe Manana #define BTRFS_DEV_STATE_NO_READA (5) 54ebbede42SAnand Jain 550b86a832SChris Mason struct btrfs_device { 560b6f5d40SNikolay Borisov struct list_head dev_list; /* device_list_mutex */ 570b6f5d40SNikolay Borisov struct list_head dev_alloc_list; /* chunk mutex */ 58bbbf7243SNikolay Borisov struct list_head post_commit_list; /* chunk mutex */ 592b82032cSYan Zheng struct btrfs_fs_devices *fs_devices; 60fb456252SJeff Mahoney struct btrfs_fs_info *fs_info; 61ffbd517dSChris Mason 628d1a7aaeSMadhuparna Bhowmik struct rcu_string __rcu *name; 63d5ee37bcSMiao Xie 64d5ee37bcSMiao Xie u64 generation; 65d5ee37bcSMiao Xie 66d5ee37bcSMiao Xie struct block_device *bdev; 67d5ee37bcSMiao Xie 68d5ee37bcSMiao Xie /* the mode sent to blkdev_get */ 69d5ee37bcSMiao Xie fmode_t mode; 70d5ee37bcSMiao Xie 71ebbede42SAnand Jain unsigned long dev_state; 7258efbc9fSOmar Sandoval blk_status_t last_flush_error; 73b3075717SChris Mason 747cc8e58dSMiao Xie #ifdef __BTRFS_NEED_DEVICE_DATA_ORDERED 757cc8e58dSMiao Xie seqcount_t data_seqcount; 767cc8e58dSMiao Xie #endif 777cc8e58dSMiao Xie 780b86a832SChris Mason /* the internal btrfs device id */ 790b86a832SChris Mason u64 devid; 800b86a832SChris Mason 816ba40b61SMiao Xie /* size of the device in memory */ 820b86a832SChris Mason u64 total_bytes; 830b86a832SChris Mason 846ba40b61SMiao Xie /* size of the device on disk */ 85d6397baeSChris Ball u64 disk_total_bytes; 86d6397baeSChris Ball 870b86a832SChris Mason /* bytes used */ 880b86a832SChris Mason u64 bytes_used; 890b86a832SChris Mason 900b86a832SChris Mason /* optimal io alignment for this device */ 910b86a832SChris Mason u32 io_align; 920b86a832SChris Mason 930b86a832SChris Mason /* optimal io width for this device */ 940b86a832SChris Mason u32 io_width; 953c45bfc1SDulshani Gunawardhana /* type and info about this device */ 963c45bfc1SDulshani Gunawardhana u64 type; 970b86a832SChris Mason 980b86a832SChris Mason /* minimal io size for this device */ 990b86a832SChris Mason u32 sector_size; 1000b86a832SChris Mason 1010b86a832SChris Mason /* physical drive uuid (or lvm uuid) */ 102e17cade2SChris Mason u8 uuid[BTRFS_UUID_SIZE]; 1038b712842SChris Mason 104935e5cc9SMiao Xie /* 105935e5cc9SMiao Xie * size of the device on the current transaction 106935e5cc9SMiao Xie * 107935e5cc9SMiao Xie * This variant is update when committing the transaction, 108bbbf7243SNikolay Borisov * and protected by chunk mutex 109935e5cc9SMiao Xie */ 110935e5cc9SMiao Xie u64 commit_total_bytes; 111935e5cc9SMiao Xie 112ce7213c7SMiao Xie /* bytes used on the current transaction */ 113ce7213c7SMiao Xie u64 commit_bytes_used; 114935e5cc9SMiao Xie 1153c45bfc1SDulshani Gunawardhana /* for sending down flush barriers */ 1163c45bfc1SDulshani Gunawardhana struct bio *flush_bio; 1173c45bfc1SDulshani Gunawardhana struct completion flush_wait; 1183c45bfc1SDulshani Gunawardhana 119a2de733cSArne Jansen /* per-device scrub information */ 120cadbc0a0SAnand Jain struct scrub_ctx *scrub_ctx; 121a2de733cSArne Jansen 12290519d66SArne Jansen /* readahead state */ 12390519d66SArne Jansen atomic_t reada_in_flight; 12490519d66SArne Jansen u64 reada_next; 12590519d66SArne Jansen struct reada_zone *reada_curr_zone; 12690519d66SArne Jansen struct radix_tree_root reada_zones; 12790519d66SArne Jansen struct radix_tree_root reada_extents; 128387125fcSChris Mason 129442a4f63SStefan Behrens /* disk I/O failure stats. For detailed description refer to 130442a4f63SStefan Behrens * enum btrfs_dev_stat_values in ioctl.h */ 131733f4fbbSStefan Behrens int dev_stats_valid; 132addc3fa7SMiao Xie 133addc3fa7SMiao Xie /* Counter to record the change of device stats */ 134addc3fa7SMiao Xie atomic_t dev_stats_ccnt; 135442a4f63SStefan Behrens atomic_t dev_stat_values[BTRFS_DEV_STAT_VALUES_MAX]; 1361c11b63eSJeff Mahoney 1371c11b63eSJeff Mahoney struct extent_io_tree alloc_state; 138668e48afSAnand Jain 139668e48afSAnand Jain struct completion kobj_unregister; 140668e48afSAnand Jain /* For sysfs/FSID/devinfo/devid/ */ 141668e48afSAnand Jain struct kobject devid_kobj; 1420b86a832SChris Mason }; 1430b86a832SChris Mason 1447cc8e58dSMiao Xie /* 1457cc8e58dSMiao Xie * If we read those variants at the context of their own lock, we needn't 1467cc8e58dSMiao Xie * use the following helpers, reading them directly is safe. 1477cc8e58dSMiao Xie */ 1487cc8e58dSMiao Xie #if BITS_PER_LONG==32 && defined(CONFIG_SMP) 1497cc8e58dSMiao Xie #define BTRFS_DEVICE_GETSET_FUNCS(name) \ 1507cc8e58dSMiao Xie static inline u64 \ 1517cc8e58dSMiao Xie btrfs_device_get_##name(const struct btrfs_device *dev) \ 1527cc8e58dSMiao Xie { \ 1537cc8e58dSMiao Xie u64 size; \ 1547cc8e58dSMiao Xie unsigned int seq; \ 1557cc8e58dSMiao Xie \ 1567cc8e58dSMiao Xie do { \ 1577cc8e58dSMiao Xie seq = read_seqcount_begin(&dev->data_seqcount); \ 1587cc8e58dSMiao Xie size = dev->name; \ 1597cc8e58dSMiao Xie } while (read_seqcount_retry(&dev->data_seqcount, seq)); \ 1607cc8e58dSMiao Xie return size; \ 1617cc8e58dSMiao Xie } \ 1627cc8e58dSMiao Xie \ 1637cc8e58dSMiao Xie static inline void \ 1647cc8e58dSMiao Xie btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ 1657cc8e58dSMiao Xie { \ 1667cc8e58dSMiao Xie preempt_disable(); \ 1677cc8e58dSMiao Xie write_seqcount_begin(&dev->data_seqcount); \ 1687cc8e58dSMiao Xie dev->name = size; \ 1697cc8e58dSMiao Xie write_seqcount_end(&dev->data_seqcount); \ 1707cc8e58dSMiao Xie preempt_enable(); \ 1717cc8e58dSMiao Xie } 17294545870SThomas Gleixner #elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPTION) 1737cc8e58dSMiao Xie #define BTRFS_DEVICE_GETSET_FUNCS(name) \ 1747cc8e58dSMiao Xie static inline u64 \ 1757cc8e58dSMiao Xie btrfs_device_get_##name(const struct btrfs_device *dev) \ 1767cc8e58dSMiao Xie { \ 1777cc8e58dSMiao Xie u64 size; \ 1787cc8e58dSMiao Xie \ 1797cc8e58dSMiao Xie preempt_disable(); \ 1807cc8e58dSMiao Xie size = dev->name; \ 1817cc8e58dSMiao Xie preempt_enable(); \ 1827cc8e58dSMiao Xie return size; \ 1837cc8e58dSMiao Xie } \ 1847cc8e58dSMiao Xie \ 1857cc8e58dSMiao Xie static inline void \ 1867cc8e58dSMiao Xie btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ 1877cc8e58dSMiao Xie { \ 1887cc8e58dSMiao Xie preempt_disable(); \ 1897cc8e58dSMiao Xie dev->name = size; \ 1907cc8e58dSMiao Xie preempt_enable(); \ 1917cc8e58dSMiao Xie } 1927cc8e58dSMiao Xie #else 1937cc8e58dSMiao Xie #define BTRFS_DEVICE_GETSET_FUNCS(name) \ 1947cc8e58dSMiao Xie static inline u64 \ 1957cc8e58dSMiao Xie btrfs_device_get_##name(const struct btrfs_device *dev) \ 1967cc8e58dSMiao Xie { \ 1977cc8e58dSMiao Xie return dev->name; \ 1987cc8e58dSMiao Xie } \ 1997cc8e58dSMiao Xie \ 2007cc8e58dSMiao Xie static inline void \ 2017cc8e58dSMiao Xie btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ 2027cc8e58dSMiao Xie { \ 2037cc8e58dSMiao Xie dev->name = size; \ 2047cc8e58dSMiao Xie } 2057cc8e58dSMiao Xie #endif 2067cc8e58dSMiao Xie 2077cc8e58dSMiao Xie BTRFS_DEVICE_GETSET_FUNCS(total_bytes); 2087cc8e58dSMiao Xie BTRFS_DEVICE_GETSET_FUNCS(disk_total_bytes); 2097cc8e58dSMiao Xie BTRFS_DEVICE_GETSET_FUNCS(bytes_used); 2107cc8e58dSMiao Xie 211c4a816c6SNaohiro Aota enum btrfs_chunk_allocation_policy { 212c4a816c6SNaohiro Aota BTRFS_CHUNK_ALLOC_REGULAR, 213c4a816c6SNaohiro Aota }; 214c4a816c6SNaohiro Aota 2158a4b83ccSChris Mason struct btrfs_fs_devices { 2168a4b83ccSChris Mason u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 2177239ff4bSNikolay Borisov u8 metadata_uuid[BTRFS_FSID_SIZE]; 218d1a63002SNikolay Borisov bool fsid_change; 219c4babc5eSAnand Jain struct list_head fs_list; 2208a4b83ccSChris Mason 2218a4b83ccSChris Mason u64 num_devices; 222a0af469bSChris Mason u64 open_devices; 2232b82032cSYan Zheng u64 rw_devices; 224cd02dca5SChris Mason u64 missing_devices; 2252b82032cSYan Zheng u64 total_rw_bytes; 22602db0844SJosef Bacik u64 total_devices; 227d1a63002SNikolay Borisov 228d1a63002SNikolay Borisov /* Highest generation number of seen devices */ 229d1a63002SNikolay Borisov u64 latest_generation; 230d1a63002SNikolay Borisov 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; 2400b6f5d40SNikolay Borisov 2410b6f5d40SNikolay Borisov /* List of all devices, protected by device_list_mutex */ 2428a4b83ccSChris Mason struct list_head devices; 243b3075717SChris Mason 2440b6f5d40SNikolay Borisov /* 2450b6f5d40SNikolay Borisov * Devices which can satisfy space allocation. Protected by 2460b6f5d40SNikolay Borisov * chunk_mutex 2470b6f5d40SNikolay Borisov */ 248b3075717SChris Mason struct list_head alloc_list; 2492b82032cSYan Zheng 250944d3f9fSNikolay Borisov struct list_head seed_list; 2510395d84fSJohannes Thumshirn bool seeding; 2522b82032cSYan Zheng 2532b82032cSYan Zheng int opened; 254c289811cSChris Mason 255c289811cSChris Mason /* set when we find or add a device that doesn't have the 256c289811cSChris Mason * nonrot flag set 257c289811cSChris Mason */ 2587f0432d0SJohannes Thumshirn bool rotating; 2592e7910d6SAnand Jain 2605a13f430SAnand Jain struct btrfs_fs_info *fs_info; 2612e7910d6SAnand Jain /* sysfs kobjects */ 262c1b7e474SAnand Jain struct kobject fsid_kobj; 263b5501504SAnand Jain struct kobject *devices_kobj; 264a013d141SAnand Jain struct kobject *devinfo_kobj; 2652e7910d6SAnand Jain struct completion kobj_unregister; 266c4a816c6SNaohiro Aota 267c4a816c6SNaohiro Aota enum btrfs_chunk_allocation_policy chunk_alloc_policy; 2688a4b83ccSChris Mason }; 2698a4b83ccSChris Mason 270facc8a22SMiao Xie #define BTRFS_BIO_INLINE_CSUM_SIZE 64 271facc8a22SMiao Xie 272ab4ba2e1SQu Wenruo #define BTRFS_MAX_DEVS(info) ((BTRFS_MAX_ITEM_SIZE(info) \ 273ab4ba2e1SQu Wenruo - sizeof(struct btrfs_chunk)) \ 274ab4ba2e1SQu Wenruo / sizeof(struct btrfs_stripe) + 1) 275ab4ba2e1SQu Wenruo 276ab4ba2e1SQu Wenruo #define BTRFS_MAX_DEVS_SYS_CHUNK ((BTRFS_SYSTEM_CHUNK_ARRAY_SIZE \ 277ab4ba2e1SQu Wenruo - 2 * sizeof(struct btrfs_disk_key) \ 278ab4ba2e1SQu Wenruo - 2 * sizeof(struct btrfs_chunk)) \ 279ab4ba2e1SQu Wenruo / sizeof(struct btrfs_stripe) + 1) 280ab4ba2e1SQu Wenruo 2819be3395bSChris Mason /* 2829be3395bSChris Mason * we need the mirror number and stripe index to be passed around 2839be3395bSChris Mason * the call chain while we are processing end_io (especially errors). 2849be3395bSChris Mason * Really, what we need is a btrfs_bio structure that has this info 2859be3395bSChris Mason * and is properly sized with its stripe array, but we're not there 2869be3395bSChris Mason * quite yet. We have our own btrfs bioset, and all of the bios 2879be3395bSChris Mason * we allocate are actually btrfs_io_bios. We'll cram as much of 2889be3395bSChris Mason * struct btrfs_bio as we can into this over time. 2899be3395bSChris Mason */ 2909be3395bSChris Mason struct btrfs_io_bio { 291c1dc0896SMiao Xie unsigned int mirror_num; 292c31efbdfSNikolay Borisov struct btrfs_device *device; 293c1dc0896SMiao Xie u64 logical; 294facc8a22SMiao Xie u8 *csum; 295facc8a22SMiao Xie u8 csum_inline[BTRFS_BIO_INLINE_CSUM_SIZE]; 29617347cecSLiu Bo struct bvec_iter iter; 297fa1bcbe0SDavid Sterba /* 298fa1bcbe0SDavid Sterba * This member must come last, bio_alloc_bioset will allocate enough 299fa1bcbe0SDavid Sterba * bytes for entire btrfs_io_bio but relies on bio being last. 300fa1bcbe0SDavid Sterba */ 3019be3395bSChris Mason struct bio bio; 3029be3395bSChris Mason }; 3039be3395bSChris Mason 3049be3395bSChris Mason static inline struct btrfs_io_bio *btrfs_io_bio(struct bio *bio) 3059be3395bSChris Mason { 3069be3395bSChris Mason return container_of(bio, struct btrfs_io_bio, bio); 3079be3395bSChris Mason } 3089be3395bSChris Mason 309b3a0dd50SDavid Sterba static inline void btrfs_io_bio_free_csum(struct btrfs_io_bio *io_bio) 310b3a0dd50SDavid Sterba { 311b3a0dd50SDavid Sterba if (io_bio->csum != io_bio->csum_inline) { 312b3a0dd50SDavid Sterba kfree(io_bio->csum); 313b3a0dd50SDavid Sterba io_bio->csum = NULL; 314b3a0dd50SDavid Sterba } 315b3a0dd50SDavid Sterba } 316b3a0dd50SDavid Sterba 317cea9e445SChris Mason struct btrfs_bio_stripe { 318cea9e445SChris Mason struct btrfs_device *dev; 319cea9e445SChris Mason u64 physical; 320fce3bb9aSLi Dongyang u64 length; /* only used for discard mappings */ 321cea9e445SChris Mason }; 322cea9e445SChris Mason 323a1d3c478SJan Schmidt struct btrfs_bio { 324140475aeSElena Reshetova refcount_t refs; 325cea9e445SChris Mason atomic_t stripes_pending; 326c404e0dcSMiao Xie struct btrfs_fs_info *fs_info; 32710f11900SZhao Lei u64 map_type; /* get from map_lookup->type */ 328cea9e445SChris Mason bio_end_io_t *end_io; 3297d2b4daaSChris Mason struct bio *orig_bio; 330cea9e445SChris Mason void *private; 331a236aed1SChris Mason atomic_t error; 332a236aed1SChris Mason int max_errors; 333cea9e445SChris Mason int num_stripes; 334a1d3c478SJan Schmidt int mirror_num; 3352c8cdd6eSMiao Xie int num_tgtdevs; 3362c8cdd6eSMiao Xie int *tgtdev_map; 3378e5cfb55SZhao Lei /* 3388e5cfb55SZhao Lei * logical block numbers for the start of each stripe 3398e5cfb55SZhao Lei * The last one or two are p/q. These are sorted, 3408e5cfb55SZhao Lei * so raid_map[0] is the start of our full stripe 3418e5cfb55SZhao Lei */ 3428e5cfb55SZhao Lei u64 *raid_map; 343cea9e445SChris Mason struct btrfs_bio_stripe stripes[]; 344cea9e445SChris Mason }; 345cea9e445SChris Mason 346b2117a39SMiao Xie struct btrfs_device_info { 347b2117a39SMiao Xie struct btrfs_device *dev; 348b2117a39SMiao Xie u64 dev_offset; 349b2117a39SMiao Xie u64 max_avail; 35073c5de00SArne Jansen u64 total_avail; 351b2117a39SMiao Xie }; 352b2117a39SMiao Xie 35331e50229SLiu Bo struct btrfs_raid_attr { 3548c3e3582SDavid Sterba u8 sub_stripes; /* sub_stripes info for map */ 3558c3e3582SDavid Sterba u8 dev_stripes; /* stripes per dev */ 3568c3e3582SDavid Sterba u8 devs_max; /* max devs to use */ 3578c3e3582SDavid Sterba u8 devs_min; /* min devs needed */ 3588c3e3582SDavid Sterba u8 tolerated_failures; /* max tolerated fail devs */ 3598c3e3582SDavid Sterba u8 devs_increment; /* ndevs has to be a multiple of this */ 3608c3e3582SDavid Sterba u8 ncopies; /* how many copies to data has */ 3618c3e3582SDavid Sterba u8 nparity; /* number of stripes worth of bytes to store 362b50836edSHans van Kranenburg * parity information */ 3638c3e3582SDavid Sterba u8 mindev_error; /* error code if min devs requisite is unmet */ 364ed23467bSAnand Jain const char raid_name[8]; /* name of the raid */ 36541a6e891SAnand Jain u64 bg_flag; /* block group flag of the raid */ 36631e50229SLiu Bo }; 36731e50229SLiu Bo 368af902047SZhao Lei extern const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES]; 369af902047SZhao Lei 3701abe9b8aSliubo struct map_lookup { 3711abe9b8aSliubo u64 type; 3721abe9b8aSliubo int io_align; 3731abe9b8aSliubo int io_width; 3743d8da678SLiu Bo u64 stripe_len; 3751abe9b8aSliubo int num_stripes; 3761abe9b8aSliubo int sub_stripes; 377cf90d884SQu Wenruo int verified_stripes; /* For mount time dev extent verification */ 3781abe9b8aSliubo struct btrfs_bio_stripe stripes[]; 3791abe9b8aSliubo }; 3801abe9b8aSliubo 381a2de733cSArne Jansen #define map_lookup_size(n) (sizeof(struct map_lookup) + \ 382a2de733cSArne Jansen (sizeof(struct btrfs_bio_stripe) * (n))) 383a2de733cSArne Jansen 384c9e9f97bSIlya Dryomov struct btrfs_balance_args; 38519a39dceSIlya Dryomov struct btrfs_balance_progress; 386c9e9f97bSIlya Dryomov struct btrfs_balance_control { 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 396cf8cddd3SChristoph Hellwig enum btrfs_map_op { 397cf8cddd3SChristoph Hellwig BTRFS_MAP_READ, 398cf8cddd3SChristoph Hellwig BTRFS_MAP_WRITE, 399cf8cddd3SChristoph Hellwig BTRFS_MAP_DISCARD, 400cf8cddd3SChristoph Hellwig BTRFS_MAP_GET_READ_MIRRORS, 401cf8cddd3SChristoph Hellwig }; 402cf8cddd3SChristoph Hellwig 403cf8cddd3SChristoph Hellwig static inline enum btrfs_map_op btrfs_op(struct bio *bio) 404cf8cddd3SChristoph Hellwig { 405cf8cddd3SChristoph Hellwig switch (bio_op(bio)) { 406cf8cddd3SChristoph Hellwig case REQ_OP_DISCARD: 407cf8cddd3SChristoph Hellwig return BTRFS_MAP_DISCARD; 408cf8cddd3SChristoph Hellwig case REQ_OP_WRITE: 409cf8cddd3SChristoph Hellwig return BTRFS_MAP_WRITE; 410cf8cddd3SChristoph Hellwig default: 411cf8cddd3SChristoph Hellwig WARN_ON_ONCE(1); 412c730ae0cSMarcos Paulo de Souza fallthrough; 413cf8cddd3SChristoph Hellwig case REQ_OP_READ: 414cf8cddd3SChristoph Hellwig return BTRFS_MAP_READ; 415cf8cddd3SChristoph Hellwig } 416cf8cddd3SChristoph Hellwig } 417cf8cddd3SChristoph Hellwig 4186e9606d2SZhao Lei void btrfs_get_bbio(struct btrfs_bio *bbio); 4196e9606d2SZhao Lei void btrfs_put_bbio(struct btrfs_bio *bbio); 420cf8cddd3SChristoph Hellwig int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, 421cea9e445SChris Mason u64 logical, u64 *length, 422a1d3c478SJan Schmidt struct btrfs_bio **bbio_ret, int mirror_num); 423cf8cddd3SChristoph Hellwig int btrfs_map_sblock(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, 424af8e2d1dSMiao Xie u64 logical, u64 *length, 425825ad4c9SDavid Sterba struct btrfs_bio **bbio_ret); 4265f141126SNikolay Borisov int btrfs_get_io_geometry(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, 4275f141126SNikolay Borisov u64 logical, u64 len, struct btrfs_io_geometry *io_geom); 4286bccf3abSJeff Mahoney int btrfs_read_sys_array(struct btrfs_fs_info *fs_info); 4295b4aacefSJeff Mahoney int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info); 430c216b203SNikolay Borisov int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, u64 type); 431c8bf1b67SDavid Sterba void btrfs_mapping_tree_free(struct extent_map_tree *tree); 43258efbc9fSOmar Sandoval blk_status_t btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio, 43308635baeSChris Mason int mirror_num); 4348a4b83ccSChris Mason int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, 43597288f2cSChristoph Hellwig fmode_t flags, void *holder); 43636350e95SGu Jinxiang struct btrfs_device *btrfs_scan_one_device(const char *path, 43736350e95SGu Jinxiang fmode_t flags, void *holder); 438228a73abSAnand Jain int btrfs_forget_devices(const char *path); 43954eed6aeSNikolay Borisov void btrfs_close_devices(struct btrfs_fs_devices *fs_devices); 4409b99b115SAnand Jain void btrfs_free_extra_devids(struct btrfs_fs_devices *fs_devices, int step); 441d6507cf1SNikolay Borisov void btrfs_assign_next_active_device(struct btrfs_device *device, 442d6507cf1SNikolay Borisov struct btrfs_device *this_dev); 443a27a94c2SNikolay Borisov struct btrfs_device *btrfs_find_device_by_devspec(struct btrfs_fs_info *fs_info, 444a27a94c2SNikolay Borisov u64 devid, 445a27a94c2SNikolay Borisov const char *devpath); 44612bd2fc0SIlya Dryomov struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info, 44712bd2fc0SIlya Dryomov const u64 *devid, 44812bd2fc0SIlya Dryomov const u8 *uuid); 449a425f9d4SDavid Sterba void btrfs_free_device(struct btrfs_device *device); 4502ff7e61eSJeff Mahoney int btrfs_rm_device(struct btrfs_fs_info *fs_info, 451da353f6bSDavid Sterba const char *device_path, u64 devid); 452ffc5a379SDavid Sterba void __exit btrfs_cleanup_fs_uuids(void); 4535d964051SStefan Behrens int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len); 4548f18cf13SChris Mason int btrfs_grow_device(struct btrfs_trans_handle *trans, 4558f18cf13SChris Mason struct btrfs_device *device, u64 new_size); 456e4319cd9SAnand Jain struct btrfs_device *btrfs_find_device(struct btrfs_fs_devices *fs_devices, 45709ba3bc9SAnand Jain u64 devid, u8 *uuid, u8 *fsid, bool seed); 4588f18cf13SChris Mason int btrfs_shrink_device(struct btrfs_device *device, u64 new_size); 459da353f6bSDavid Sterba int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *path); 4606fcf6e2bSDavid Sterba int btrfs_balance(struct btrfs_fs_info *fs_info, 4616fcf6e2bSDavid Sterba struct btrfs_balance_control *bctl, 462c9e9f97bSIlya Dryomov struct btrfs_ioctl_balance_args *bargs); 463f89e09cfSAnand Jain void btrfs_describe_block_groups(u64 flags, char *buf, u32 size_buf); 4642b6ba629SIlya Dryomov int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info); 46568310a5eSIlya Dryomov int btrfs_recover_balance(struct btrfs_fs_info *fs_info); 466837d5b6eSIlya Dryomov int btrfs_pause_balance(struct btrfs_fs_info *fs_info); 467a7e99c69SIlya Dryomov int btrfs_cancel_balance(struct btrfs_fs_info *fs_info); 468f7a81ea4SStefan Behrens int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info); 46997f4dd09SNikolay Borisov int btrfs_uuid_scan_kthread(void *data); 4702ff7e61eSJeff Mahoney int btrfs_chunk_readonly(struct btrfs_fs_info *fs_info, u64 chunk_offset); 47160dfdf25SNikolay Borisov int find_free_dev_extent(struct btrfs_device *device, u64 num_bytes, 472ba1bf481SJosef Bacik u64 *start, u64 *max_avail); 473442a4f63SStefan Behrens void btrfs_dev_stat_inc_and_print(struct btrfs_device *dev, int index); 4742ff7e61eSJeff Mahoney int btrfs_get_dev_stats(struct btrfs_fs_info *fs_info, 475b27f7c0cSDavid Sterba struct btrfs_ioctl_get_dev_stats *stats); 476cb517eabSMiao Xie void btrfs_init_devices_late(struct btrfs_fs_info *fs_info); 477733f4fbbSStefan Behrens int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info); 478196c9d8dSDavid Sterba int btrfs_run_dev_stats(struct btrfs_trans_handle *trans); 47968a9db5fSNikolay Borisov void btrfs_rm_dev_replace_remove_srcdev(struct btrfs_device *srcdev); 48065237ee3SDavid Sterba void btrfs_rm_dev_replace_free_srcdev(struct btrfs_device *srcdev); 4814f5ad7bdSNikolay Borisov void btrfs_destroy_dev_replace_tgtdev(struct btrfs_device *tgtdev); 482592d92eeSLiu Bo int btrfs_is_parity_mirror(struct btrfs_fs_info *fs_info, 483e4ff5fb5SNikolay Borisov u64 logical, u64 len); 4842ff7e61eSJeff Mahoney unsigned long btrfs_full_stripe_len(struct btrfs_fs_info *fs_info, 48553b381b3SDavid Woodhouse u64 logical); 4866df9a95eSJosef Bacik int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans, 4876df9a95eSJosef Bacik u64 chunk_offset, u64 chunk_size); 48897aff912SNikolay Borisov int btrfs_remove_chunk(struct btrfs_trans_handle *trans, u64 chunk_offset); 48960ca842eSOmar Sandoval struct extent_map *btrfs_get_chunk_map(struct btrfs_fs_info *fs_info, 49060ca842eSOmar Sandoval u64 logical, u64 length); 4918f32380dSJohannes Thumshirn void btrfs_release_disk_super(struct btrfs_super_block *super); 492addc3fa7SMiao Xie 493442a4f63SStefan Behrens static inline void btrfs_dev_stat_inc(struct btrfs_device *dev, 494442a4f63SStefan Behrens int index) 495442a4f63SStefan Behrens { 496442a4f63SStefan Behrens atomic_inc(dev->dev_stat_values + index); 4979deae968SNikolay Borisov /* 4989deae968SNikolay Borisov * This memory barrier orders stores updating statistics before stores 4999deae968SNikolay Borisov * updating dev_stats_ccnt. 5009deae968SNikolay Borisov * 5019deae968SNikolay Borisov * It pairs with smp_rmb() in btrfs_run_dev_stats(). 5029deae968SNikolay Borisov */ 503addc3fa7SMiao Xie smp_mb__before_atomic(); 504addc3fa7SMiao Xie atomic_inc(&dev->dev_stats_ccnt); 505442a4f63SStefan Behrens } 506442a4f63SStefan Behrens 507442a4f63SStefan Behrens static inline int btrfs_dev_stat_read(struct btrfs_device *dev, 508442a4f63SStefan Behrens int index) 509442a4f63SStefan Behrens { 510442a4f63SStefan Behrens return atomic_read(dev->dev_stat_values + index); 511442a4f63SStefan Behrens } 512442a4f63SStefan Behrens 513442a4f63SStefan Behrens static inline int btrfs_dev_stat_read_and_reset(struct btrfs_device *dev, 514442a4f63SStefan Behrens int index) 515442a4f63SStefan Behrens { 516442a4f63SStefan Behrens int ret; 517442a4f63SStefan Behrens 518442a4f63SStefan Behrens ret = atomic_xchg(dev->dev_stat_values + index, 0); 5194660c49fSNikolay Borisov /* 5204660c49fSNikolay Borisov * atomic_xchg implies a full memory barriers as per atomic_t.txt: 5214660c49fSNikolay Borisov * - RMW operations that have a return value are fully ordered; 5224660c49fSNikolay Borisov * 5234660c49fSNikolay Borisov * This implicit memory barriers is paired with the smp_rmb in 5244660c49fSNikolay Borisov * btrfs_run_dev_stats 5254660c49fSNikolay Borisov */ 526addc3fa7SMiao Xie atomic_inc(&dev->dev_stats_ccnt); 527442a4f63SStefan Behrens return ret; 528442a4f63SStefan Behrens } 529442a4f63SStefan Behrens 530442a4f63SStefan Behrens static inline void btrfs_dev_stat_set(struct btrfs_device *dev, 531442a4f63SStefan Behrens int index, unsigned long val) 532442a4f63SStefan Behrens { 533442a4f63SStefan Behrens atomic_set(dev->dev_stat_values + index, val); 5349deae968SNikolay Borisov /* 5359deae968SNikolay Borisov * This memory barrier orders stores updating statistics before stores 5369deae968SNikolay Borisov * updating dev_stats_ccnt. 5379deae968SNikolay Borisov * 5389deae968SNikolay Borisov * It pairs with smp_rmb() in btrfs_run_dev_stats(). 5399deae968SNikolay Borisov */ 540addc3fa7SMiao Xie smp_mb__before_atomic(); 541addc3fa7SMiao Xie atomic_inc(&dev->dev_stats_ccnt); 542442a4f63SStefan Behrens } 543442a4f63SStefan Behrens 5443e72ee88SQu Wenruo /* 5453e72ee88SQu Wenruo * Convert block group flags (BTRFS_BLOCK_GROUP_*) to btrfs_raid_types, which 5463e72ee88SQu Wenruo * can be used as index to access btrfs_raid_array[]. 5473e72ee88SQu Wenruo */ 5483e72ee88SQu Wenruo static inline enum btrfs_raid_types btrfs_bg_flags_to_raid_index(u64 flags) 5493e72ee88SQu Wenruo { 5503e72ee88SQu Wenruo if (flags & BTRFS_BLOCK_GROUP_RAID10) 5513e72ee88SQu Wenruo return BTRFS_RAID_RAID10; 5523e72ee88SQu Wenruo else if (flags & BTRFS_BLOCK_GROUP_RAID1) 5533e72ee88SQu Wenruo return BTRFS_RAID_RAID1; 55447e6f742SDavid Sterba else if (flags & BTRFS_BLOCK_GROUP_RAID1C3) 55547e6f742SDavid Sterba return BTRFS_RAID_RAID1C3; 5568d6fac00SDavid Sterba else if (flags & BTRFS_BLOCK_GROUP_RAID1C4) 5578d6fac00SDavid Sterba return BTRFS_RAID_RAID1C4; 5583e72ee88SQu Wenruo else if (flags & BTRFS_BLOCK_GROUP_DUP) 5593e72ee88SQu Wenruo return BTRFS_RAID_DUP; 5603e72ee88SQu Wenruo else if (flags & BTRFS_BLOCK_GROUP_RAID0) 5613e72ee88SQu Wenruo return BTRFS_RAID_RAID0; 5623e72ee88SQu Wenruo else if (flags & BTRFS_BLOCK_GROUP_RAID5) 5633e72ee88SQu Wenruo return BTRFS_RAID_RAID5; 5643e72ee88SQu Wenruo else if (flags & BTRFS_BLOCK_GROUP_RAID6) 5653e72ee88SQu Wenruo return BTRFS_RAID_RAID6; 5663e72ee88SQu Wenruo 5673e72ee88SQu Wenruo return BTRFS_RAID_SINGLE; /* BTRFS_BLOCK_GROUP_SINGLE */ 5683e72ee88SQu Wenruo } 5693e72ee88SQu Wenruo 570bbbf7243SNikolay Borisov void btrfs_commit_device_sizes(struct btrfs_transaction *trans); 57104216820SFilipe Manana 5724143cb8bSDavid Sterba struct list_head * __attribute_const__ btrfs_get_fs_uuids(void); 5736528b99dSAnand Jain bool btrfs_check_rw_degradable(struct btrfs_fs_info *fs_info, 5746528b99dSAnand Jain struct btrfs_device *failing_dev); 575313b0858SJosef Bacik void btrfs_scratch_superblocks(struct btrfs_fs_info *fs_info, 576313b0858SJosef Bacik struct block_device *bdev, 577313b0858SJosef Bacik const char *device_path); 57821634a19SQu Wenruo 57946df06b8SDavid Sterba int btrfs_bg_type_to_factor(u64 flags); 580158da513SDavid Sterba const char *btrfs_bg_type_to_raid_name(u64 flags); 581cf90d884SQu Wenruo int btrfs_verify_dev_extents(struct btrfs_fs_info *fs_info); 58246df06b8SDavid Sterba 5830b86a832SChris Mason #endif 584