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 42c41ec452SSu Yue #define btrfs_device_data_ordered_init(device) \ 43c41ec452SSu Yue seqcount_init(&device->data_seqcount) 447cc8e58dSMiao Xie #else 45c41ec452SSu Yue #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 555b316468SNaohiro Aota struct btrfs_zoned_device_info; 565b316468SNaohiro Aota 570b86a832SChris Mason struct btrfs_device { 580b6f5d40SNikolay Borisov struct list_head dev_list; /* device_list_mutex */ 590b6f5d40SNikolay Borisov struct list_head dev_alloc_list; /* chunk mutex */ 60bbbf7243SNikolay Borisov struct list_head post_commit_list; /* chunk mutex */ 612b82032cSYan Zheng struct btrfs_fs_devices *fs_devices; 62fb456252SJeff Mahoney struct btrfs_fs_info *fs_info; 63ffbd517dSChris Mason 648d1a7aaeSMadhuparna Bhowmik struct rcu_string __rcu *name; 65d5ee37bcSMiao Xie 66d5ee37bcSMiao Xie u64 generation; 67d5ee37bcSMiao Xie 68d5ee37bcSMiao Xie struct block_device *bdev; 69d5ee37bcSMiao Xie 705b316468SNaohiro Aota struct btrfs_zoned_device_info *zone_info; 715b316468SNaohiro Aota 72d5ee37bcSMiao Xie /* the mode sent to blkdev_get */ 73d5ee37bcSMiao Xie fmode_t mode; 74d5ee37bcSMiao Xie 75ebbede42SAnand Jain unsigned long dev_state; 7658efbc9fSOmar Sandoval blk_status_t last_flush_error; 77b3075717SChris Mason 787cc8e58dSMiao Xie #ifdef __BTRFS_NEED_DEVICE_DATA_ORDERED 79c41ec452SSu Yue seqcount_t data_seqcount; 807cc8e58dSMiao Xie #endif 817cc8e58dSMiao Xie 820b86a832SChris Mason /* the internal btrfs device id */ 830b86a832SChris Mason u64 devid; 840b86a832SChris Mason 856ba40b61SMiao Xie /* size of the device in memory */ 860b86a832SChris Mason u64 total_bytes; 870b86a832SChris Mason 886ba40b61SMiao Xie /* size of the device on disk */ 89d6397baeSChris Ball u64 disk_total_bytes; 90d6397baeSChris Ball 910b86a832SChris Mason /* bytes used */ 920b86a832SChris Mason u64 bytes_used; 930b86a832SChris Mason 940b86a832SChris Mason /* optimal io alignment for this device */ 950b86a832SChris Mason u32 io_align; 960b86a832SChris Mason 970b86a832SChris Mason /* optimal io width for this device */ 980b86a832SChris Mason u32 io_width; 993c45bfc1SDulshani Gunawardhana /* type and info about this device */ 1003c45bfc1SDulshani Gunawardhana u64 type; 1010b86a832SChris Mason 1020b86a832SChris Mason /* minimal io size for this device */ 1030b86a832SChris Mason u32 sector_size; 1040b86a832SChris Mason 1050b86a832SChris Mason /* physical drive uuid (or lvm uuid) */ 106e17cade2SChris Mason u8 uuid[BTRFS_UUID_SIZE]; 1078b712842SChris Mason 108935e5cc9SMiao Xie /* 109935e5cc9SMiao Xie * size of the device on the current transaction 110935e5cc9SMiao Xie * 111935e5cc9SMiao Xie * This variant is update when committing the transaction, 112bbbf7243SNikolay Borisov * and protected by chunk mutex 113935e5cc9SMiao Xie */ 114935e5cc9SMiao Xie u64 commit_total_bytes; 115935e5cc9SMiao Xie 116ce7213c7SMiao Xie /* bytes used on the current transaction */ 117ce7213c7SMiao Xie u64 commit_bytes_used; 118935e5cc9SMiao Xie 1193c45bfc1SDulshani Gunawardhana /* for sending down flush barriers */ 1203c45bfc1SDulshani Gunawardhana struct bio *flush_bio; 1213c45bfc1SDulshani Gunawardhana struct completion flush_wait; 1223c45bfc1SDulshani Gunawardhana 123a2de733cSArne Jansen /* per-device scrub information */ 124cadbc0a0SAnand Jain struct scrub_ctx *scrub_ctx; 125a2de733cSArne Jansen 12690519d66SArne Jansen /* readahead state */ 12790519d66SArne Jansen atomic_t reada_in_flight; 12890519d66SArne Jansen u64 reada_next; 12990519d66SArne Jansen struct reada_zone *reada_curr_zone; 13090519d66SArne Jansen struct radix_tree_root reada_zones; 13190519d66SArne Jansen struct radix_tree_root reada_extents; 132387125fcSChris Mason 133442a4f63SStefan Behrens /* disk I/O failure stats. For detailed description refer to 134442a4f63SStefan Behrens * enum btrfs_dev_stat_values in ioctl.h */ 135733f4fbbSStefan Behrens int dev_stats_valid; 136addc3fa7SMiao Xie 137addc3fa7SMiao Xie /* Counter to record the change of device stats */ 138addc3fa7SMiao Xie atomic_t dev_stats_ccnt; 139442a4f63SStefan Behrens atomic_t dev_stat_values[BTRFS_DEV_STAT_VALUES_MAX]; 1401c11b63eSJeff Mahoney 1411c11b63eSJeff Mahoney struct extent_io_tree alloc_state; 142668e48afSAnand Jain 143668e48afSAnand Jain struct completion kobj_unregister; 144668e48afSAnand Jain /* For sysfs/FSID/devinfo/devid/ */ 145668e48afSAnand Jain struct kobject devid_kobj; 1460b86a832SChris Mason }; 1470b86a832SChris Mason 1487cc8e58dSMiao Xie /* 1497cc8e58dSMiao Xie * If we read those variants at the context of their own lock, we needn't 1507cc8e58dSMiao Xie * use the following helpers, reading them directly is safe. 1517cc8e58dSMiao Xie */ 1527cc8e58dSMiao Xie #if BITS_PER_LONG==32 && defined(CONFIG_SMP) 1537cc8e58dSMiao Xie #define BTRFS_DEVICE_GETSET_FUNCS(name) \ 1547cc8e58dSMiao Xie static inline u64 \ 1557cc8e58dSMiao Xie btrfs_device_get_##name(const struct btrfs_device *dev) \ 1567cc8e58dSMiao Xie { \ 1577cc8e58dSMiao Xie u64 size; \ 1587cc8e58dSMiao Xie unsigned int seq; \ 1597cc8e58dSMiao Xie \ 1607cc8e58dSMiao Xie do { \ 1617cc8e58dSMiao Xie seq = read_seqcount_begin(&dev->data_seqcount); \ 1627cc8e58dSMiao Xie size = dev->name; \ 1637cc8e58dSMiao Xie } while (read_seqcount_retry(&dev->data_seqcount, seq)); \ 1647cc8e58dSMiao Xie return size; \ 1657cc8e58dSMiao Xie } \ 1667cc8e58dSMiao Xie \ 1677cc8e58dSMiao Xie static inline void \ 1687cc8e58dSMiao Xie btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ 1697cc8e58dSMiao Xie { \ 170c41ec452SSu Yue preempt_disable(); \ 1717cc8e58dSMiao Xie write_seqcount_begin(&dev->data_seqcount); \ 1727cc8e58dSMiao Xie dev->name = size; \ 1737cc8e58dSMiao Xie write_seqcount_end(&dev->data_seqcount); \ 174c41ec452SSu Yue preempt_enable(); \ 1757cc8e58dSMiao Xie } 17694545870SThomas Gleixner #elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPTION) 1777cc8e58dSMiao Xie #define BTRFS_DEVICE_GETSET_FUNCS(name) \ 1787cc8e58dSMiao Xie static inline u64 \ 1797cc8e58dSMiao Xie btrfs_device_get_##name(const struct btrfs_device *dev) \ 1807cc8e58dSMiao Xie { \ 1817cc8e58dSMiao Xie u64 size; \ 1827cc8e58dSMiao Xie \ 1837cc8e58dSMiao Xie preempt_disable(); \ 1847cc8e58dSMiao Xie size = dev->name; \ 1857cc8e58dSMiao Xie preempt_enable(); \ 1867cc8e58dSMiao Xie return size; \ 1877cc8e58dSMiao Xie } \ 1887cc8e58dSMiao Xie \ 1897cc8e58dSMiao Xie static inline void \ 1907cc8e58dSMiao Xie btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ 1917cc8e58dSMiao Xie { \ 1927cc8e58dSMiao Xie preempt_disable(); \ 1937cc8e58dSMiao Xie dev->name = size; \ 1947cc8e58dSMiao Xie preempt_enable(); \ 1957cc8e58dSMiao Xie } 1967cc8e58dSMiao Xie #else 1977cc8e58dSMiao Xie #define BTRFS_DEVICE_GETSET_FUNCS(name) \ 1987cc8e58dSMiao Xie static inline u64 \ 1997cc8e58dSMiao Xie btrfs_device_get_##name(const struct btrfs_device *dev) \ 2007cc8e58dSMiao Xie { \ 2017cc8e58dSMiao Xie return dev->name; \ 2027cc8e58dSMiao Xie } \ 2037cc8e58dSMiao Xie \ 2047cc8e58dSMiao Xie static inline void \ 2057cc8e58dSMiao Xie btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ 2067cc8e58dSMiao Xie { \ 2077cc8e58dSMiao Xie dev->name = size; \ 2087cc8e58dSMiao Xie } 2097cc8e58dSMiao Xie #endif 2107cc8e58dSMiao Xie 2117cc8e58dSMiao Xie BTRFS_DEVICE_GETSET_FUNCS(total_bytes); 2127cc8e58dSMiao Xie BTRFS_DEVICE_GETSET_FUNCS(disk_total_bytes); 2137cc8e58dSMiao Xie BTRFS_DEVICE_GETSET_FUNCS(bytes_used); 2147cc8e58dSMiao Xie 215c4a816c6SNaohiro Aota enum btrfs_chunk_allocation_policy { 216c4a816c6SNaohiro Aota BTRFS_CHUNK_ALLOC_REGULAR, 217c4a816c6SNaohiro Aota }; 218c4a816c6SNaohiro Aota 21933fd2f71SAnand Jain /* 22033fd2f71SAnand Jain * Read policies for mirrored block group profiles, read picks the stripe based 22133fd2f71SAnand Jain * on these policies. 22233fd2f71SAnand Jain */ 22333fd2f71SAnand Jain enum btrfs_read_policy { 22433fd2f71SAnand Jain /* Use process PID to choose the stripe */ 22533fd2f71SAnand Jain BTRFS_READ_POLICY_PID, 22633fd2f71SAnand Jain BTRFS_NR_READ_POLICY, 22733fd2f71SAnand Jain }; 22833fd2f71SAnand Jain 2298a4b83ccSChris Mason struct btrfs_fs_devices { 2308a4b83ccSChris Mason u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 2317239ff4bSNikolay Borisov u8 metadata_uuid[BTRFS_FSID_SIZE]; 232d1a63002SNikolay Borisov bool fsid_change; 233c4babc5eSAnand Jain struct list_head fs_list; 2348a4b83ccSChris Mason 2358a4b83ccSChris Mason u64 num_devices; 236a0af469bSChris Mason u64 open_devices; 2372b82032cSYan Zheng u64 rw_devices; 238cd02dca5SChris Mason u64 missing_devices; 2392b82032cSYan Zheng u64 total_rw_bytes; 24002db0844SJosef Bacik u64 total_devices; 241d1a63002SNikolay Borisov 242d1a63002SNikolay Borisov /* Highest generation number of seen devices */ 243d1a63002SNikolay Borisov u64 latest_generation; 244d1a63002SNikolay Borisov 2458a4b83ccSChris Mason struct block_device *latest_bdev; 246e5e9a520SChris Mason 247e5e9a520SChris Mason /* all of the devices in the FS, protected by a mutex 248e5e9a520SChris Mason * so we can safely walk it to write out the supers without 2499b011adfSWang Shilong * worrying about add/remove by the multi-device code. 2509b011adfSWang Shilong * Scrubbing super can kick off supers writing by holding 2519b011adfSWang Shilong * this mutex lock. 252e5e9a520SChris Mason */ 253e5e9a520SChris Mason struct mutex device_list_mutex; 2540b6f5d40SNikolay Borisov 2550b6f5d40SNikolay Borisov /* List of all devices, protected by device_list_mutex */ 2568a4b83ccSChris Mason struct list_head devices; 257b3075717SChris Mason 2580b6f5d40SNikolay Borisov /* 2590b6f5d40SNikolay Borisov * Devices which can satisfy space allocation. Protected by 2600b6f5d40SNikolay Borisov * chunk_mutex 2610b6f5d40SNikolay Borisov */ 262b3075717SChris Mason struct list_head alloc_list; 2632b82032cSYan Zheng 264944d3f9fSNikolay Borisov struct list_head seed_list; 2650395d84fSJohannes Thumshirn bool seeding; 2662b82032cSYan Zheng 2672b82032cSYan Zheng int opened; 268c289811cSChris Mason 269c289811cSChris Mason /* set when we find or add a device that doesn't have the 270c289811cSChris Mason * nonrot flag set 271c289811cSChris Mason */ 2727f0432d0SJohannes Thumshirn bool rotating; 2732e7910d6SAnand Jain 2745a13f430SAnand Jain struct btrfs_fs_info *fs_info; 2752e7910d6SAnand Jain /* sysfs kobjects */ 276c1b7e474SAnand Jain struct kobject fsid_kobj; 277b5501504SAnand Jain struct kobject *devices_kobj; 278a013d141SAnand Jain struct kobject *devinfo_kobj; 2792e7910d6SAnand Jain struct completion kobj_unregister; 280c4a816c6SNaohiro Aota 281c4a816c6SNaohiro Aota enum btrfs_chunk_allocation_policy chunk_alloc_policy; 28233fd2f71SAnand Jain 28333fd2f71SAnand Jain /* Policy used to read the mirrored stripes */ 28433fd2f71SAnand Jain enum btrfs_read_policy read_policy; 2858a4b83ccSChris Mason }; 2868a4b83ccSChris Mason 287facc8a22SMiao Xie #define BTRFS_BIO_INLINE_CSUM_SIZE 64 288facc8a22SMiao Xie 289ab4ba2e1SQu Wenruo #define BTRFS_MAX_DEVS(info) ((BTRFS_MAX_ITEM_SIZE(info) \ 290ab4ba2e1SQu Wenruo - sizeof(struct btrfs_chunk)) \ 291ab4ba2e1SQu Wenruo / sizeof(struct btrfs_stripe) + 1) 292ab4ba2e1SQu Wenruo 293ab4ba2e1SQu Wenruo #define BTRFS_MAX_DEVS_SYS_CHUNK ((BTRFS_SYSTEM_CHUNK_ARRAY_SIZE \ 294ab4ba2e1SQu Wenruo - 2 * sizeof(struct btrfs_disk_key) \ 295ab4ba2e1SQu Wenruo - 2 * sizeof(struct btrfs_chunk)) \ 296ab4ba2e1SQu Wenruo / sizeof(struct btrfs_stripe) + 1) 297ab4ba2e1SQu Wenruo 2989be3395bSChris Mason /* 2999be3395bSChris Mason * we need the mirror number and stripe index to be passed around 3009be3395bSChris Mason * the call chain while we are processing end_io (especially errors). 3019be3395bSChris Mason * Really, what we need is a btrfs_bio structure that has this info 3029be3395bSChris Mason * and is properly sized with its stripe array, but we're not there 3039be3395bSChris Mason * quite yet. We have our own btrfs bioset, and all of the bios 3049be3395bSChris Mason * we allocate are actually btrfs_io_bios. We'll cram as much of 3059be3395bSChris Mason * struct btrfs_bio as we can into this over time. 3069be3395bSChris Mason */ 3079be3395bSChris Mason struct btrfs_io_bio { 308c1dc0896SMiao Xie unsigned int mirror_num; 309c31efbdfSNikolay Borisov struct btrfs_device *device; 310c1dc0896SMiao Xie u64 logical; 311facc8a22SMiao Xie u8 *csum; 312facc8a22SMiao Xie u8 csum_inline[BTRFS_BIO_INLINE_CSUM_SIZE]; 31317347cecSLiu Bo struct bvec_iter iter; 314fa1bcbe0SDavid Sterba /* 315fa1bcbe0SDavid Sterba * This member must come last, bio_alloc_bioset will allocate enough 316fa1bcbe0SDavid Sterba * bytes for entire btrfs_io_bio but relies on bio being last. 317fa1bcbe0SDavid Sterba */ 3189be3395bSChris Mason struct bio bio; 3199be3395bSChris Mason }; 3209be3395bSChris Mason 3219be3395bSChris Mason static inline struct btrfs_io_bio *btrfs_io_bio(struct bio *bio) 3229be3395bSChris Mason { 3239be3395bSChris Mason return container_of(bio, struct btrfs_io_bio, bio); 3249be3395bSChris Mason } 3259be3395bSChris Mason 326b3a0dd50SDavid Sterba static inline void btrfs_io_bio_free_csum(struct btrfs_io_bio *io_bio) 327b3a0dd50SDavid Sterba { 328b3a0dd50SDavid Sterba if (io_bio->csum != io_bio->csum_inline) { 329b3a0dd50SDavid Sterba kfree(io_bio->csum); 330b3a0dd50SDavid Sterba io_bio->csum = NULL; 331b3a0dd50SDavid Sterba } 332b3a0dd50SDavid Sterba } 333b3a0dd50SDavid Sterba 334cea9e445SChris Mason struct btrfs_bio_stripe { 335cea9e445SChris Mason struct btrfs_device *dev; 336cea9e445SChris Mason u64 physical; 337fce3bb9aSLi Dongyang u64 length; /* only used for discard mappings */ 338cea9e445SChris Mason }; 339cea9e445SChris Mason 340a1d3c478SJan Schmidt struct btrfs_bio { 341140475aeSElena Reshetova refcount_t refs; 342cea9e445SChris Mason atomic_t stripes_pending; 343c404e0dcSMiao Xie struct btrfs_fs_info *fs_info; 34410f11900SZhao Lei u64 map_type; /* get from map_lookup->type */ 345cea9e445SChris Mason bio_end_io_t *end_io; 3467d2b4daaSChris Mason struct bio *orig_bio; 347cea9e445SChris Mason void *private; 348a236aed1SChris Mason atomic_t error; 349a236aed1SChris Mason int max_errors; 350cea9e445SChris Mason int num_stripes; 351a1d3c478SJan Schmidt int mirror_num; 3522c8cdd6eSMiao Xie int num_tgtdevs; 3532c8cdd6eSMiao Xie int *tgtdev_map; 3548e5cfb55SZhao Lei /* 3558e5cfb55SZhao Lei * logical block numbers for the start of each stripe 3568e5cfb55SZhao Lei * The last one or two are p/q. These are sorted, 3578e5cfb55SZhao Lei * so raid_map[0] is the start of our full stripe 3588e5cfb55SZhao Lei */ 3598e5cfb55SZhao Lei u64 *raid_map; 360cea9e445SChris Mason struct btrfs_bio_stripe stripes[]; 361cea9e445SChris Mason }; 362cea9e445SChris Mason 363b2117a39SMiao Xie struct btrfs_device_info { 364b2117a39SMiao Xie struct btrfs_device *dev; 365b2117a39SMiao Xie u64 dev_offset; 366b2117a39SMiao Xie u64 max_avail; 36773c5de00SArne Jansen u64 total_avail; 368b2117a39SMiao Xie }; 369b2117a39SMiao Xie 37031e50229SLiu Bo struct btrfs_raid_attr { 3718c3e3582SDavid Sterba u8 sub_stripes; /* sub_stripes info for map */ 3728c3e3582SDavid Sterba u8 dev_stripes; /* stripes per dev */ 3738c3e3582SDavid Sterba u8 devs_max; /* max devs to use */ 3748c3e3582SDavid Sterba u8 devs_min; /* min devs needed */ 3758c3e3582SDavid Sterba u8 tolerated_failures; /* max tolerated fail devs */ 3768c3e3582SDavid Sterba u8 devs_increment; /* ndevs has to be a multiple of this */ 3778c3e3582SDavid Sterba u8 ncopies; /* how many copies to data has */ 3788c3e3582SDavid Sterba u8 nparity; /* number of stripes worth of bytes to store 379b50836edSHans van Kranenburg * parity information */ 3808c3e3582SDavid Sterba u8 mindev_error; /* error code if min devs requisite is unmet */ 381ed23467bSAnand Jain const char raid_name[8]; /* name of the raid */ 38241a6e891SAnand Jain u64 bg_flag; /* block group flag of the raid */ 38331e50229SLiu Bo }; 38431e50229SLiu Bo 385af902047SZhao Lei extern const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES]; 386af902047SZhao Lei 3871abe9b8aSliubo struct map_lookup { 3881abe9b8aSliubo u64 type; 3891abe9b8aSliubo int io_align; 3901abe9b8aSliubo int io_width; 3913d8da678SLiu Bo u64 stripe_len; 3921abe9b8aSliubo int num_stripes; 3931abe9b8aSliubo int sub_stripes; 394cf90d884SQu Wenruo int verified_stripes; /* For mount time dev extent verification */ 3951abe9b8aSliubo struct btrfs_bio_stripe stripes[]; 3961abe9b8aSliubo }; 3971abe9b8aSliubo 398a2de733cSArne Jansen #define map_lookup_size(n) (sizeof(struct map_lookup) + \ 399a2de733cSArne Jansen (sizeof(struct btrfs_bio_stripe) * (n))) 400a2de733cSArne Jansen 401c9e9f97bSIlya Dryomov struct btrfs_balance_args; 40219a39dceSIlya Dryomov struct btrfs_balance_progress; 403c9e9f97bSIlya Dryomov struct btrfs_balance_control { 404c9e9f97bSIlya Dryomov struct btrfs_balance_args data; 405c9e9f97bSIlya Dryomov struct btrfs_balance_args meta; 406c9e9f97bSIlya Dryomov struct btrfs_balance_args sys; 407c9e9f97bSIlya Dryomov 408c9e9f97bSIlya Dryomov u64 flags; 40919a39dceSIlya Dryomov 41019a39dceSIlya Dryomov struct btrfs_balance_progress stat; 411c9e9f97bSIlya Dryomov }; 412c9e9f97bSIlya Dryomov 413cf8cddd3SChristoph Hellwig enum btrfs_map_op { 414cf8cddd3SChristoph Hellwig BTRFS_MAP_READ, 415cf8cddd3SChristoph Hellwig BTRFS_MAP_WRITE, 416cf8cddd3SChristoph Hellwig BTRFS_MAP_DISCARD, 417cf8cddd3SChristoph Hellwig BTRFS_MAP_GET_READ_MIRRORS, 418cf8cddd3SChristoph Hellwig }; 419cf8cddd3SChristoph Hellwig 420cf8cddd3SChristoph Hellwig static inline enum btrfs_map_op btrfs_op(struct bio *bio) 421cf8cddd3SChristoph Hellwig { 422cf8cddd3SChristoph Hellwig switch (bio_op(bio)) { 423cf8cddd3SChristoph Hellwig case REQ_OP_DISCARD: 424cf8cddd3SChristoph Hellwig return BTRFS_MAP_DISCARD; 425cf8cddd3SChristoph Hellwig case REQ_OP_WRITE: 426cf8cddd3SChristoph Hellwig return BTRFS_MAP_WRITE; 427cf8cddd3SChristoph Hellwig default: 428cf8cddd3SChristoph Hellwig WARN_ON_ONCE(1); 429c730ae0cSMarcos Paulo de Souza fallthrough; 430cf8cddd3SChristoph Hellwig case REQ_OP_READ: 431cf8cddd3SChristoph Hellwig return BTRFS_MAP_READ; 432cf8cddd3SChristoph Hellwig } 433cf8cddd3SChristoph Hellwig } 434cf8cddd3SChristoph Hellwig 4356e9606d2SZhao Lei void btrfs_get_bbio(struct btrfs_bio *bbio); 4366e9606d2SZhao Lei void btrfs_put_bbio(struct btrfs_bio *bbio); 437cf8cddd3SChristoph Hellwig int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, 438cea9e445SChris Mason u64 logical, u64 *length, 439a1d3c478SJan Schmidt struct btrfs_bio **bbio_ret, int mirror_num); 440cf8cddd3SChristoph Hellwig int btrfs_map_sblock(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, 441af8e2d1dSMiao Xie u64 logical, u64 *length, 442825ad4c9SDavid Sterba struct btrfs_bio **bbio_ret); 443*42034313SMichal Rostecki int btrfs_get_io_geometry(struct btrfs_fs_info *fs_info, struct extent_map *map, 444*42034313SMichal Rostecki enum btrfs_map_op op, u64 logical, u64 len, 445*42034313SMichal Rostecki struct btrfs_io_geometry *io_geom); 4466bccf3abSJeff Mahoney int btrfs_read_sys_array(struct btrfs_fs_info *fs_info); 4475b4aacefSJeff Mahoney int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info); 448c216b203SNikolay Borisov int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, u64 type); 449c8bf1b67SDavid Sterba void btrfs_mapping_tree_free(struct extent_map_tree *tree); 45058efbc9fSOmar Sandoval blk_status_t btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio, 45108635baeSChris Mason int mirror_num); 4528a4b83ccSChris Mason int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, 45397288f2cSChristoph Hellwig fmode_t flags, void *holder); 45436350e95SGu Jinxiang struct btrfs_device *btrfs_scan_one_device(const char *path, 45536350e95SGu Jinxiang fmode_t flags, void *holder); 456228a73abSAnand Jain int btrfs_forget_devices(const char *path); 45754eed6aeSNikolay Borisov void btrfs_close_devices(struct btrfs_fs_devices *fs_devices); 458bacce86aSAnand Jain void btrfs_free_extra_devids(struct btrfs_fs_devices *fs_devices); 459d6507cf1SNikolay Borisov void btrfs_assign_next_active_device(struct btrfs_device *device, 460d6507cf1SNikolay Borisov struct btrfs_device *this_dev); 461a27a94c2SNikolay Borisov struct btrfs_device *btrfs_find_device_by_devspec(struct btrfs_fs_info *fs_info, 462a27a94c2SNikolay Borisov u64 devid, 463a27a94c2SNikolay Borisov const char *devpath); 46412bd2fc0SIlya Dryomov struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info, 46512bd2fc0SIlya Dryomov const u64 *devid, 46612bd2fc0SIlya Dryomov const u8 *uuid); 467a425f9d4SDavid Sterba void btrfs_free_device(struct btrfs_device *device); 4682ff7e61eSJeff Mahoney int btrfs_rm_device(struct btrfs_fs_info *fs_info, 469da353f6bSDavid Sterba const char *device_path, u64 devid); 470ffc5a379SDavid Sterba void __exit btrfs_cleanup_fs_uuids(void); 4715d964051SStefan Behrens int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len); 4728f18cf13SChris Mason int btrfs_grow_device(struct btrfs_trans_handle *trans, 4738f18cf13SChris Mason struct btrfs_device *device, u64 new_size); 474e4319cd9SAnand Jain struct btrfs_device *btrfs_find_device(struct btrfs_fs_devices *fs_devices, 475b2598edfSAnand Jain u64 devid, u8 *uuid, u8 *fsid); 4768f18cf13SChris Mason int btrfs_shrink_device(struct btrfs_device *device, u64 new_size); 477da353f6bSDavid Sterba int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *path); 4786fcf6e2bSDavid Sterba int btrfs_balance(struct btrfs_fs_info *fs_info, 4796fcf6e2bSDavid Sterba struct btrfs_balance_control *bctl, 480c9e9f97bSIlya Dryomov struct btrfs_ioctl_balance_args *bargs); 481f89e09cfSAnand Jain void btrfs_describe_block_groups(u64 flags, char *buf, u32 size_buf); 4822b6ba629SIlya Dryomov int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info); 48368310a5eSIlya Dryomov int btrfs_recover_balance(struct btrfs_fs_info *fs_info); 484837d5b6eSIlya Dryomov int btrfs_pause_balance(struct btrfs_fs_info *fs_info); 485a7e99c69SIlya Dryomov int btrfs_cancel_balance(struct btrfs_fs_info *fs_info); 486f7a81ea4SStefan Behrens int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info); 48797f4dd09SNikolay Borisov int btrfs_uuid_scan_kthread(void *data); 4882ff7e61eSJeff Mahoney int btrfs_chunk_readonly(struct btrfs_fs_info *fs_info, u64 chunk_offset); 48960dfdf25SNikolay Borisov int find_free_dev_extent(struct btrfs_device *device, u64 num_bytes, 490ba1bf481SJosef Bacik u64 *start, u64 *max_avail); 491442a4f63SStefan Behrens void btrfs_dev_stat_inc_and_print(struct btrfs_device *dev, int index); 4922ff7e61eSJeff Mahoney int btrfs_get_dev_stats(struct btrfs_fs_info *fs_info, 493b27f7c0cSDavid Sterba struct btrfs_ioctl_get_dev_stats *stats); 494cb517eabSMiao Xie void btrfs_init_devices_late(struct btrfs_fs_info *fs_info); 495733f4fbbSStefan Behrens int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info); 496196c9d8dSDavid Sterba int btrfs_run_dev_stats(struct btrfs_trans_handle *trans); 49768a9db5fSNikolay Borisov void btrfs_rm_dev_replace_remove_srcdev(struct btrfs_device *srcdev); 49865237ee3SDavid Sterba void btrfs_rm_dev_replace_free_srcdev(struct btrfs_device *srcdev); 4994f5ad7bdSNikolay Borisov void btrfs_destroy_dev_replace_tgtdev(struct btrfs_device *tgtdev); 500592d92eeSLiu Bo int btrfs_is_parity_mirror(struct btrfs_fs_info *fs_info, 501e4ff5fb5SNikolay Borisov u64 logical, u64 len); 5022ff7e61eSJeff Mahoney unsigned long btrfs_full_stripe_len(struct btrfs_fs_info *fs_info, 50353b381b3SDavid Woodhouse u64 logical); 5046df9a95eSJosef Bacik int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans, 5056df9a95eSJosef Bacik u64 chunk_offset, u64 chunk_size); 50697aff912SNikolay Borisov int btrfs_remove_chunk(struct btrfs_trans_handle *trans, u64 chunk_offset); 50760ca842eSOmar Sandoval struct extent_map *btrfs_get_chunk_map(struct btrfs_fs_info *fs_info, 50860ca842eSOmar Sandoval u64 logical, u64 length); 5098f32380dSJohannes Thumshirn void btrfs_release_disk_super(struct btrfs_super_block *super); 510addc3fa7SMiao Xie 511442a4f63SStefan Behrens static inline void btrfs_dev_stat_inc(struct btrfs_device *dev, 512442a4f63SStefan Behrens int index) 513442a4f63SStefan Behrens { 514442a4f63SStefan Behrens atomic_inc(dev->dev_stat_values + index); 5159deae968SNikolay Borisov /* 5169deae968SNikolay Borisov * This memory barrier orders stores updating statistics before stores 5179deae968SNikolay Borisov * updating dev_stats_ccnt. 5189deae968SNikolay Borisov * 5199deae968SNikolay Borisov * It pairs with smp_rmb() in btrfs_run_dev_stats(). 5209deae968SNikolay Borisov */ 521addc3fa7SMiao Xie smp_mb__before_atomic(); 522addc3fa7SMiao Xie atomic_inc(&dev->dev_stats_ccnt); 523442a4f63SStefan Behrens } 524442a4f63SStefan Behrens 525442a4f63SStefan Behrens static inline int btrfs_dev_stat_read(struct btrfs_device *dev, 526442a4f63SStefan Behrens int index) 527442a4f63SStefan Behrens { 528442a4f63SStefan Behrens return atomic_read(dev->dev_stat_values + index); 529442a4f63SStefan Behrens } 530442a4f63SStefan Behrens 531442a4f63SStefan Behrens static inline int btrfs_dev_stat_read_and_reset(struct btrfs_device *dev, 532442a4f63SStefan Behrens int index) 533442a4f63SStefan Behrens { 534442a4f63SStefan Behrens int ret; 535442a4f63SStefan Behrens 536442a4f63SStefan Behrens ret = atomic_xchg(dev->dev_stat_values + index, 0); 5374660c49fSNikolay Borisov /* 5384660c49fSNikolay Borisov * atomic_xchg implies a full memory barriers as per atomic_t.txt: 5394660c49fSNikolay Borisov * - RMW operations that have a return value are fully ordered; 5404660c49fSNikolay Borisov * 5414660c49fSNikolay Borisov * This implicit memory barriers is paired with the smp_rmb in 5424660c49fSNikolay Borisov * btrfs_run_dev_stats 5434660c49fSNikolay Borisov */ 544addc3fa7SMiao Xie atomic_inc(&dev->dev_stats_ccnt); 545442a4f63SStefan Behrens return ret; 546442a4f63SStefan Behrens } 547442a4f63SStefan Behrens 548442a4f63SStefan Behrens static inline void btrfs_dev_stat_set(struct btrfs_device *dev, 549442a4f63SStefan Behrens int index, unsigned long val) 550442a4f63SStefan Behrens { 551442a4f63SStefan Behrens atomic_set(dev->dev_stat_values + index, val); 5529deae968SNikolay Borisov /* 5539deae968SNikolay Borisov * This memory barrier orders stores updating statistics before stores 5549deae968SNikolay Borisov * updating dev_stats_ccnt. 5559deae968SNikolay Borisov * 5569deae968SNikolay Borisov * It pairs with smp_rmb() in btrfs_run_dev_stats(). 5579deae968SNikolay Borisov */ 558addc3fa7SMiao Xie smp_mb__before_atomic(); 559addc3fa7SMiao Xie atomic_inc(&dev->dev_stats_ccnt); 560442a4f63SStefan Behrens } 561442a4f63SStefan Behrens 5623e72ee88SQu Wenruo /* 5633e72ee88SQu Wenruo * Convert block group flags (BTRFS_BLOCK_GROUP_*) to btrfs_raid_types, which 5643e72ee88SQu Wenruo * can be used as index to access btrfs_raid_array[]. 5653e72ee88SQu Wenruo */ 5663e72ee88SQu Wenruo static inline enum btrfs_raid_types btrfs_bg_flags_to_raid_index(u64 flags) 5673e72ee88SQu Wenruo { 5683e72ee88SQu Wenruo if (flags & BTRFS_BLOCK_GROUP_RAID10) 5693e72ee88SQu Wenruo return BTRFS_RAID_RAID10; 5703e72ee88SQu Wenruo else if (flags & BTRFS_BLOCK_GROUP_RAID1) 5713e72ee88SQu Wenruo return BTRFS_RAID_RAID1; 57247e6f742SDavid Sterba else if (flags & BTRFS_BLOCK_GROUP_RAID1C3) 57347e6f742SDavid Sterba return BTRFS_RAID_RAID1C3; 5748d6fac00SDavid Sterba else if (flags & BTRFS_BLOCK_GROUP_RAID1C4) 5758d6fac00SDavid Sterba return BTRFS_RAID_RAID1C4; 5763e72ee88SQu Wenruo else if (flags & BTRFS_BLOCK_GROUP_DUP) 5773e72ee88SQu Wenruo return BTRFS_RAID_DUP; 5783e72ee88SQu Wenruo else if (flags & BTRFS_BLOCK_GROUP_RAID0) 5793e72ee88SQu Wenruo return BTRFS_RAID_RAID0; 5803e72ee88SQu Wenruo else if (flags & BTRFS_BLOCK_GROUP_RAID5) 5813e72ee88SQu Wenruo return BTRFS_RAID_RAID5; 5823e72ee88SQu Wenruo else if (flags & BTRFS_BLOCK_GROUP_RAID6) 5833e72ee88SQu Wenruo return BTRFS_RAID_RAID6; 5843e72ee88SQu Wenruo 5853e72ee88SQu Wenruo return BTRFS_RAID_SINGLE; /* BTRFS_BLOCK_GROUP_SINGLE */ 5863e72ee88SQu Wenruo } 5873e72ee88SQu Wenruo 588bbbf7243SNikolay Borisov void btrfs_commit_device_sizes(struct btrfs_transaction *trans); 58904216820SFilipe Manana 5904143cb8bSDavid Sterba struct list_head * __attribute_const__ btrfs_get_fs_uuids(void); 5916528b99dSAnand Jain bool btrfs_check_rw_degradable(struct btrfs_fs_info *fs_info, 5926528b99dSAnand Jain struct btrfs_device *failing_dev); 593313b0858SJosef Bacik void btrfs_scratch_superblocks(struct btrfs_fs_info *fs_info, 594313b0858SJosef Bacik struct block_device *bdev, 595313b0858SJosef Bacik const char *device_path); 59621634a19SQu Wenruo 59746df06b8SDavid Sterba int btrfs_bg_type_to_factor(u64 flags); 598158da513SDavid Sterba const char *btrfs_bg_type_to_raid_name(u64 flags); 599cf90d884SQu Wenruo int btrfs_verify_dev_extents(struct btrfs_fs_info *fs_info); 60046df06b8SDavid Sterba 6010b86a832SChris Mason #endif 602