1103c1972SChristoph Hellwig // SPDX-License-Identifier: GPL-2.0 2103c1972SChristoph Hellwig /* 3103c1972SChristoph Hellwig * Copyright (C) 2007 Oracle. All rights reserved. 4103c1972SChristoph Hellwig * Copyright (C) 2022 Christoph Hellwig. 5103c1972SChristoph Hellwig */ 6103c1972SChristoph Hellwig 7103c1972SChristoph Hellwig #include <linux/bio.h> 8103c1972SChristoph Hellwig #include "bio.h" 9103c1972SChristoph Hellwig #include "ctree.h" 10103c1972SChristoph Hellwig #include "volumes.h" 11103c1972SChristoph Hellwig #include "raid56.h" 12103c1972SChristoph Hellwig #include "async-thread.h" 13103c1972SChristoph Hellwig #include "check-integrity.h" 14103c1972SChristoph Hellwig #include "dev-replace.h" 15103c1972SChristoph Hellwig #include "rcu-string.h" 16103c1972SChristoph Hellwig #include "zoned.h" 171c2b3ee3SChristoph Hellwig #include "file-item.h" 18103c1972SChristoph Hellwig 19103c1972SChristoph Hellwig static struct bio_set btrfs_bioset; 20852eee62SChristoph Hellwig static struct bio_set btrfs_clone_bioset; 217609afacSChristoph Hellwig static struct bio_set btrfs_repair_bioset; 227609afacSChristoph Hellwig static mempool_t btrfs_failed_bio_pool; 237609afacSChristoph Hellwig 247609afacSChristoph Hellwig struct btrfs_failed_bio { 257609afacSChristoph Hellwig struct btrfs_bio *bbio; 267609afacSChristoph Hellwig int num_copies; 277609afacSChristoph Hellwig atomic_t repair_count; 287609afacSChristoph Hellwig }; 29103c1972SChristoph Hellwig 30103c1972SChristoph Hellwig /* 31103c1972SChristoph Hellwig * Initialize a btrfs_bio structure. This skips the embedded bio itself as it 32103c1972SChristoph Hellwig * is already initialized by the block layer. 33103c1972SChristoph Hellwig */ 344317ff00SQu Wenruo void btrfs_bio_init(struct btrfs_bio *bbio, struct btrfs_fs_info *fs_info, 35103c1972SChristoph Hellwig btrfs_bio_end_io_t end_io, void *private) 36103c1972SChristoph Hellwig { 37103c1972SChristoph Hellwig memset(bbio, 0, offsetof(struct btrfs_bio, bio)); 384317ff00SQu Wenruo bbio->fs_info = fs_info; 39103c1972SChristoph Hellwig bbio->end_io = end_io; 40103c1972SChristoph Hellwig bbio->private = private; 41852eee62SChristoph Hellwig atomic_set(&bbio->pending_ios, 1); 42103c1972SChristoph Hellwig } 43103c1972SChristoph Hellwig 44103c1972SChristoph Hellwig /* 45103c1972SChristoph Hellwig * Allocate a btrfs_bio structure. The btrfs_bio is the main I/O container for 46103c1972SChristoph Hellwig * btrfs, and is used for all I/O submitted through btrfs_submit_bio. 47103c1972SChristoph Hellwig * 48103c1972SChristoph Hellwig * Just like the underlying bio_alloc_bioset it will not fail as it is backed by 49103c1972SChristoph Hellwig * a mempool. 50103c1972SChristoph Hellwig */ 51b41bbd29SChristoph Hellwig struct btrfs_bio *btrfs_bio_alloc(unsigned int nr_vecs, blk_opf_t opf, 524317ff00SQu Wenruo struct btrfs_fs_info *fs_info, 53103c1972SChristoph Hellwig btrfs_bio_end_io_t end_io, void *private) 54103c1972SChristoph Hellwig { 55b41bbd29SChristoph Hellwig struct btrfs_bio *bbio; 56103c1972SChristoph Hellwig struct bio *bio; 57103c1972SChristoph Hellwig 58103c1972SChristoph Hellwig bio = bio_alloc_bioset(NULL, nr_vecs, opf, GFP_NOFS, &btrfs_bioset); 59b41bbd29SChristoph Hellwig bbio = btrfs_bio(bio); 604317ff00SQu Wenruo btrfs_bio_init(bbio, fs_info, end_io, private); 61b41bbd29SChristoph Hellwig return bbio; 62103c1972SChristoph Hellwig } 63103c1972SChristoph Hellwig 647edd339cSChristoph Hellwig static blk_status_t btrfs_bio_extract_ordered_extent(struct btrfs_bio *bbio) 657edd339cSChristoph Hellwig { 667edd339cSChristoph Hellwig struct btrfs_ordered_extent *ordered; 677edd339cSChristoph Hellwig int ret; 687edd339cSChristoph Hellwig 697edd339cSChristoph Hellwig ordered = btrfs_lookup_ordered_extent(bbio->inode, bbio->file_offset); 707edd339cSChristoph Hellwig if (WARN_ON_ONCE(!ordered)) 717edd339cSChristoph Hellwig return BLK_STS_IOERR; 727edd339cSChristoph Hellwig ret = btrfs_extract_ordered_extent(bbio, ordered); 737edd339cSChristoph Hellwig btrfs_put_ordered_extent(ordered); 747edd339cSChristoph Hellwig 757edd339cSChristoph Hellwig return errno_to_blk_status(ret); 767edd339cSChristoph Hellwig } 777edd339cSChristoph Hellwig 782cef0c79SChristoph Hellwig static struct btrfs_bio *btrfs_split_bio(struct btrfs_fs_info *fs_info, 792cef0c79SChristoph Hellwig struct btrfs_bio *orig_bbio, 802cef0c79SChristoph Hellwig u64 map_length, bool use_append) 81852eee62SChristoph Hellwig { 822cef0c79SChristoph Hellwig struct btrfs_bio *bbio; 83852eee62SChristoph Hellwig struct bio *bio; 84852eee62SChristoph Hellwig 85d5e4377dSChristoph Hellwig if (use_append) { 86d5e4377dSChristoph Hellwig unsigned int nr_segs; 87d5e4377dSChristoph Hellwig 882cef0c79SChristoph Hellwig bio = bio_split_rw(&orig_bbio->bio, &fs_info->limits, &nr_segs, 89d5e4377dSChristoph Hellwig &btrfs_clone_bioset, map_length); 90d5e4377dSChristoph Hellwig } else { 912cef0c79SChristoph Hellwig bio = bio_split(&orig_bbio->bio, map_length >> SECTOR_SHIFT, 922cef0c79SChristoph Hellwig GFP_NOFS, &btrfs_clone_bioset); 93d5e4377dSChristoph Hellwig } 942cef0c79SChristoph Hellwig bbio = btrfs_bio(bio); 954317ff00SQu Wenruo btrfs_bio_init(bbio, fs_info, NULL, orig_bbio); 964317ff00SQu Wenruo bbio->inode = orig_bbio->inode; 972cef0c79SChristoph Hellwig bbio->file_offset = orig_bbio->file_offset; 982cef0c79SChristoph Hellwig if (!(orig_bbio->bio.bi_opf & REQ_BTRFS_ONE_ORDERED)) 99852eee62SChristoph Hellwig orig_bbio->file_offset += map_length; 100852eee62SChristoph Hellwig 101852eee62SChristoph Hellwig atomic_inc(&orig_bbio->pending_ios); 1022cef0c79SChristoph Hellwig return bbio; 103852eee62SChristoph Hellwig } 104852eee62SChristoph Hellwig 105852eee62SChristoph Hellwig static void btrfs_orig_write_end_io(struct bio *bio); 106852eee62SChristoph Hellwig 107852eee62SChristoph Hellwig static void btrfs_bbio_propagate_error(struct btrfs_bio *bbio, 108852eee62SChristoph Hellwig struct btrfs_bio *orig_bbio) 109852eee62SChristoph Hellwig { 110852eee62SChristoph Hellwig /* 111852eee62SChristoph Hellwig * For writes we tolerate nr_mirrors - 1 write failures, so we can't 112852eee62SChristoph Hellwig * just blindly propagate a write failure here. Instead increment the 113852eee62SChristoph Hellwig * error count in the original I/O context so that it is guaranteed to 114852eee62SChristoph Hellwig * be larger than the error tolerance. 115852eee62SChristoph Hellwig */ 116852eee62SChristoph Hellwig if (bbio->bio.bi_end_io == &btrfs_orig_write_end_io) { 117852eee62SChristoph Hellwig struct btrfs_io_stripe *orig_stripe = orig_bbio->bio.bi_private; 118852eee62SChristoph Hellwig struct btrfs_io_context *orig_bioc = orig_stripe->bioc; 119852eee62SChristoph Hellwig 120852eee62SChristoph Hellwig atomic_add(orig_bioc->max_errors, &orig_bioc->error); 121852eee62SChristoph Hellwig } else { 122852eee62SChristoph Hellwig orig_bbio->bio.bi_status = bbio->bio.bi_status; 123852eee62SChristoph Hellwig } 124852eee62SChristoph Hellwig } 125852eee62SChristoph Hellwig 126852eee62SChristoph Hellwig static void btrfs_orig_bbio_end_io(struct btrfs_bio *bbio) 127852eee62SChristoph Hellwig { 128852eee62SChristoph Hellwig if (bbio->bio.bi_pool == &btrfs_clone_bioset) { 129852eee62SChristoph Hellwig struct btrfs_bio *orig_bbio = bbio->private; 130852eee62SChristoph Hellwig 131852eee62SChristoph Hellwig if (bbio->bio.bi_status) 132852eee62SChristoph Hellwig btrfs_bbio_propagate_error(bbio, orig_bbio); 133852eee62SChristoph Hellwig bio_put(&bbio->bio); 134852eee62SChristoph Hellwig bbio = orig_bbio; 135852eee62SChristoph Hellwig } 136852eee62SChristoph Hellwig 137852eee62SChristoph Hellwig if (atomic_dec_and_test(&bbio->pending_ios)) 138852eee62SChristoph Hellwig bbio->end_io(bbio); 139852eee62SChristoph Hellwig } 140852eee62SChristoph Hellwig 1417609afacSChristoph Hellwig static int next_repair_mirror(struct btrfs_failed_bio *fbio, int cur_mirror) 1427609afacSChristoph Hellwig { 1437609afacSChristoph Hellwig if (cur_mirror == fbio->num_copies) 1447609afacSChristoph Hellwig return cur_mirror + 1 - fbio->num_copies; 1457609afacSChristoph Hellwig return cur_mirror + 1; 1467609afacSChristoph Hellwig } 1477609afacSChristoph Hellwig 1487609afacSChristoph Hellwig static int prev_repair_mirror(struct btrfs_failed_bio *fbio, int cur_mirror) 1497609afacSChristoph Hellwig { 1507609afacSChristoph Hellwig if (cur_mirror == 1) 1517609afacSChristoph Hellwig return fbio->num_copies; 1527609afacSChristoph Hellwig return cur_mirror - 1; 1537609afacSChristoph Hellwig } 1547609afacSChristoph Hellwig 1557609afacSChristoph Hellwig static void btrfs_repair_done(struct btrfs_failed_bio *fbio) 1567609afacSChristoph Hellwig { 1577609afacSChristoph Hellwig if (atomic_dec_and_test(&fbio->repair_count)) { 158852eee62SChristoph Hellwig btrfs_orig_bbio_end_io(fbio->bbio); 1597609afacSChristoph Hellwig mempool_free(fbio, &btrfs_failed_bio_pool); 1607609afacSChristoph Hellwig } 1617609afacSChristoph Hellwig } 1627609afacSChristoph Hellwig 1637609afacSChristoph Hellwig static void btrfs_end_repair_bio(struct btrfs_bio *repair_bbio, 1647609afacSChristoph Hellwig struct btrfs_device *dev) 1657609afacSChristoph Hellwig { 1667609afacSChristoph Hellwig struct btrfs_failed_bio *fbio = repair_bbio->private; 1677609afacSChristoph Hellwig struct btrfs_inode *inode = repair_bbio->inode; 1687609afacSChristoph Hellwig struct btrfs_fs_info *fs_info = inode->root->fs_info; 1697609afacSChristoph Hellwig struct bio_vec *bv = bio_first_bvec_all(&repair_bbio->bio); 1707609afacSChristoph Hellwig int mirror = repair_bbio->mirror_num; 1717609afacSChristoph Hellwig 1727609afacSChristoph Hellwig if (repair_bbio->bio.bi_status || 1737609afacSChristoph Hellwig !btrfs_data_csum_ok(repair_bbio, dev, 0, bv)) { 1747609afacSChristoph Hellwig bio_reset(&repair_bbio->bio, NULL, REQ_OP_READ); 1750d3acb25SChristoph Hellwig repair_bbio->bio.bi_iter = repair_bbio->saved_iter; 1767609afacSChristoph Hellwig 1777609afacSChristoph Hellwig mirror = next_repair_mirror(fbio, mirror); 1787609afacSChristoph Hellwig if (mirror == fbio->bbio->mirror_num) { 1797609afacSChristoph Hellwig btrfs_debug(fs_info, "no mirror left"); 1807609afacSChristoph Hellwig fbio->bbio->bio.bi_status = BLK_STS_IOERR; 1817609afacSChristoph Hellwig goto done; 1827609afacSChristoph Hellwig } 1837609afacSChristoph Hellwig 184ae42a154SChristoph Hellwig btrfs_submit_bio(repair_bbio, mirror); 1857609afacSChristoph Hellwig return; 1867609afacSChristoph Hellwig } 1877609afacSChristoph Hellwig 1887609afacSChristoph Hellwig do { 1897609afacSChristoph Hellwig mirror = prev_repair_mirror(fbio, mirror); 1907609afacSChristoph Hellwig btrfs_repair_io_failure(fs_info, btrfs_ino(inode), 1917609afacSChristoph Hellwig repair_bbio->file_offset, fs_info->sectorsize, 1920d3acb25SChristoph Hellwig repair_bbio->saved_iter.bi_sector << SECTOR_SHIFT, 1937609afacSChristoph Hellwig bv->bv_page, bv->bv_offset, mirror); 1947609afacSChristoph Hellwig } while (mirror != fbio->bbio->mirror_num); 1957609afacSChristoph Hellwig 1967609afacSChristoph Hellwig done: 1977609afacSChristoph Hellwig btrfs_repair_done(fbio); 1987609afacSChristoph Hellwig bio_put(&repair_bbio->bio); 1997609afacSChristoph Hellwig } 2007609afacSChristoph Hellwig 2017609afacSChristoph Hellwig /* 2027609afacSChristoph Hellwig * Try to kick off a repair read to the next available mirror for a bad sector. 2037609afacSChristoph Hellwig * 2047609afacSChristoph Hellwig * This primarily tries to recover good data to serve the actual read request, 2057609afacSChristoph Hellwig * but also tries to write the good data back to the bad mirror(s) when a 2067609afacSChristoph Hellwig * read succeeded to restore the redundancy. 2077609afacSChristoph Hellwig */ 2087609afacSChristoph Hellwig static struct btrfs_failed_bio *repair_one_sector(struct btrfs_bio *failed_bbio, 2097609afacSChristoph Hellwig u32 bio_offset, 2107609afacSChristoph Hellwig struct bio_vec *bv, 2117609afacSChristoph Hellwig struct btrfs_failed_bio *fbio) 2127609afacSChristoph Hellwig { 2137609afacSChristoph Hellwig struct btrfs_inode *inode = failed_bbio->inode; 2147609afacSChristoph Hellwig struct btrfs_fs_info *fs_info = inode->root->fs_info; 2157609afacSChristoph Hellwig const u32 sectorsize = fs_info->sectorsize; 2160d3acb25SChristoph Hellwig const u64 logical = (failed_bbio->saved_iter.bi_sector << SECTOR_SHIFT); 2177609afacSChristoph Hellwig struct btrfs_bio *repair_bbio; 2187609afacSChristoph Hellwig struct bio *repair_bio; 2197609afacSChristoph Hellwig int num_copies; 2207609afacSChristoph Hellwig int mirror; 2217609afacSChristoph Hellwig 2227609afacSChristoph Hellwig btrfs_debug(fs_info, "repair read error: read error at %llu", 2237609afacSChristoph Hellwig failed_bbio->file_offset + bio_offset); 2247609afacSChristoph Hellwig 2257609afacSChristoph Hellwig num_copies = btrfs_num_copies(fs_info, logical, sectorsize); 2267609afacSChristoph Hellwig if (num_copies == 1) { 2277609afacSChristoph Hellwig btrfs_debug(fs_info, "no copy to repair from"); 2287609afacSChristoph Hellwig failed_bbio->bio.bi_status = BLK_STS_IOERR; 2297609afacSChristoph Hellwig return fbio; 2307609afacSChristoph Hellwig } 2317609afacSChristoph Hellwig 2327609afacSChristoph Hellwig if (!fbio) { 2337609afacSChristoph Hellwig fbio = mempool_alloc(&btrfs_failed_bio_pool, GFP_NOFS); 2347609afacSChristoph Hellwig fbio->bbio = failed_bbio; 2357609afacSChristoph Hellwig fbio->num_copies = num_copies; 2367609afacSChristoph Hellwig atomic_set(&fbio->repair_count, 1); 2377609afacSChristoph Hellwig } 2387609afacSChristoph Hellwig 2397609afacSChristoph Hellwig atomic_inc(&fbio->repair_count); 2407609afacSChristoph Hellwig 2417609afacSChristoph Hellwig repair_bio = bio_alloc_bioset(NULL, 1, REQ_OP_READ, GFP_NOFS, 2427609afacSChristoph Hellwig &btrfs_repair_bioset); 2430d3acb25SChristoph Hellwig repair_bio->bi_iter.bi_sector = failed_bbio->saved_iter.bi_sector; 244078e4cf5SJohannes Thumshirn __bio_add_page(repair_bio, bv->bv_page, bv->bv_len, bv->bv_offset); 2457609afacSChristoph Hellwig 2467609afacSChristoph Hellwig repair_bbio = btrfs_bio(repair_bio); 2474317ff00SQu Wenruo btrfs_bio_init(repair_bbio, fs_info, NULL, fbio); 2484317ff00SQu Wenruo repair_bbio->inode = failed_bbio->inode; 2497609afacSChristoph Hellwig repair_bbio->file_offset = failed_bbio->file_offset + bio_offset; 2507609afacSChristoph Hellwig 2517609afacSChristoph Hellwig mirror = next_repair_mirror(fbio, failed_bbio->mirror_num); 2527609afacSChristoph Hellwig btrfs_debug(fs_info, "submitting repair read to mirror %d", mirror); 253ae42a154SChristoph Hellwig btrfs_submit_bio(repair_bbio, mirror); 2547609afacSChristoph Hellwig return fbio; 2557609afacSChristoph Hellwig } 2567609afacSChristoph Hellwig 2577609afacSChristoph Hellwig static void btrfs_check_read_bio(struct btrfs_bio *bbio, struct btrfs_device *dev) 2587609afacSChristoph Hellwig { 2597609afacSChristoph Hellwig struct btrfs_inode *inode = bbio->inode; 2607609afacSChristoph Hellwig struct btrfs_fs_info *fs_info = inode->root->fs_info; 2617609afacSChristoph Hellwig u32 sectorsize = fs_info->sectorsize; 2620d3acb25SChristoph Hellwig struct bvec_iter *iter = &bbio->saved_iter; 2637609afacSChristoph Hellwig blk_status_t status = bbio->bio.bi_status; 2647609afacSChristoph Hellwig struct btrfs_failed_bio *fbio = NULL; 2657609afacSChristoph Hellwig u32 offset = 0; 2667609afacSChristoph Hellwig 2674317ff00SQu Wenruo /* Read-repair requires the inode field to be set by the submitter. */ 2684317ff00SQu Wenruo ASSERT(inode); 2694317ff00SQu Wenruo 2707609afacSChristoph Hellwig /* 2717609afacSChristoph Hellwig * Hand off repair bios to the repair code as there is no upper level 2727609afacSChristoph Hellwig * submitter for them. 2737609afacSChristoph Hellwig */ 2747609afacSChristoph Hellwig if (bbio->bio.bi_pool == &btrfs_repair_bioset) { 2757609afacSChristoph Hellwig btrfs_end_repair_bio(bbio, dev); 2767609afacSChristoph Hellwig return; 2777609afacSChristoph Hellwig } 2787609afacSChristoph Hellwig 2797609afacSChristoph Hellwig /* Clear the I/O error. A failed repair will reset it. */ 2807609afacSChristoph Hellwig bbio->bio.bi_status = BLK_STS_OK; 2817609afacSChristoph Hellwig 2827609afacSChristoph Hellwig while (iter->bi_size) { 2837609afacSChristoph Hellwig struct bio_vec bv = bio_iter_iovec(&bbio->bio, *iter); 2847609afacSChristoph Hellwig 2857609afacSChristoph Hellwig bv.bv_len = min(bv.bv_len, sectorsize); 2867609afacSChristoph Hellwig if (status || !btrfs_data_csum_ok(bbio, dev, offset, &bv)) 2877609afacSChristoph Hellwig fbio = repair_one_sector(bbio, offset, &bv, fbio); 2887609afacSChristoph Hellwig 2897609afacSChristoph Hellwig bio_advance_iter_single(&bbio->bio, iter, sectorsize); 2907609afacSChristoph Hellwig offset += sectorsize; 2917609afacSChristoph Hellwig } 2927609afacSChristoph Hellwig 2937ab0fdfcSChristoph Hellwig if (bbio->csum != bbio->csum_inline) 2947ab0fdfcSChristoph Hellwig kfree(bbio->csum); 2957609afacSChristoph Hellwig 2967609afacSChristoph Hellwig if (fbio) 2977609afacSChristoph Hellwig btrfs_repair_done(fbio); 2987609afacSChristoph Hellwig else 299852eee62SChristoph Hellwig btrfs_orig_bbio_end_io(bbio); 3007609afacSChristoph Hellwig } 3017609afacSChristoph Hellwig 302103c1972SChristoph Hellwig static void btrfs_log_dev_io_error(struct bio *bio, struct btrfs_device *dev) 303103c1972SChristoph Hellwig { 304103c1972SChristoph Hellwig if (!dev || !dev->bdev) 305103c1972SChristoph Hellwig return; 306103c1972SChristoph Hellwig if (bio->bi_status != BLK_STS_IOERR && bio->bi_status != BLK_STS_TARGET) 307103c1972SChristoph Hellwig return; 308103c1972SChristoph Hellwig 309103c1972SChristoph Hellwig if (btrfs_op(bio) == BTRFS_MAP_WRITE) 310103c1972SChristoph Hellwig btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_WRITE_ERRS); 31198e8d36aSNaohiro Aota else if (!(bio->bi_opf & REQ_RAHEAD)) 312103c1972SChristoph Hellwig btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_READ_ERRS); 313103c1972SChristoph Hellwig if (bio->bi_opf & REQ_PREFLUSH) 314103c1972SChristoph Hellwig btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_FLUSH_ERRS); 315103c1972SChristoph Hellwig } 316103c1972SChristoph Hellwig 317103c1972SChristoph Hellwig static struct workqueue_struct *btrfs_end_io_wq(struct btrfs_fs_info *fs_info, 318103c1972SChristoph Hellwig struct bio *bio) 319103c1972SChristoph Hellwig { 320103c1972SChristoph Hellwig if (bio->bi_opf & REQ_META) 321103c1972SChristoph Hellwig return fs_info->endio_meta_workers; 322103c1972SChristoph Hellwig return fs_info->endio_workers; 323103c1972SChristoph Hellwig } 324103c1972SChristoph Hellwig 325103c1972SChristoph Hellwig static void btrfs_end_bio_work(struct work_struct *work) 326103c1972SChristoph Hellwig { 327103c1972SChristoph Hellwig struct btrfs_bio *bbio = container_of(work, struct btrfs_bio, end_io_work); 328103c1972SChristoph Hellwig 3297609afacSChristoph Hellwig /* Metadata reads are checked and repaired by the submitter. */ 3304317ff00SQu Wenruo if (bbio->inode && !(bbio->bio.bi_opf & REQ_META)) 331860c8c45SChristoph Hellwig btrfs_check_read_bio(bbio, bbio->bio.bi_private); 3324317ff00SQu Wenruo else 33345c2f368SChristoph Hellwig btrfs_orig_bbio_end_io(bbio); 334103c1972SChristoph Hellwig } 335103c1972SChristoph Hellwig 336103c1972SChristoph Hellwig static void btrfs_simple_end_io(struct bio *bio) 337103c1972SChristoph Hellwig { 338103c1972SChristoph Hellwig struct btrfs_bio *bbio = btrfs_bio(bio); 339860c8c45SChristoph Hellwig struct btrfs_device *dev = bio->bi_private; 3404317ff00SQu Wenruo struct btrfs_fs_info *fs_info = bbio->fs_info; 341103c1972SChristoph Hellwig 342103c1972SChristoph Hellwig btrfs_bio_counter_dec(fs_info); 343103c1972SChristoph Hellwig 344103c1972SChristoph Hellwig if (bio->bi_status) 345860c8c45SChristoph Hellwig btrfs_log_dev_io_error(bio, dev); 346103c1972SChristoph Hellwig 347103c1972SChristoph Hellwig if (bio_op(bio) == REQ_OP_READ) { 348103c1972SChristoph Hellwig INIT_WORK(&bbio->end_io_work, btrfs_end_bio_work); 349103c1972SChristoph Hellwig queue_work(btrfs_end_io_wq(fs_info, bio), &bbio->end_io_work); 350103c1972SChristoph Hellwig } else { 351e9cb93b9SChristoph Hellwig if (bio_op(bio) == REQ_OP_ZONE_APPEND && !bio->bi_status) 35269ccf3f4SChristoph Hellwig btrfs_record_physical_zoned(bbio); 353852eee62SChristoph Hellwig btrfs_orig_bbio_end_io(bbio); 354103c1972SChristoph Hellwig } 355103c1972SChristoph Hellwig } 356103c1972SChristoph Hellwig 357103c1972SChristoph Hellwig static void btrfs_raid56_end_io(struct bio *bio) 358103c1972SChristoph Hellwig { 359103c1972SChristoph Hellwig struct btrfs_io_context *bioc = bio->bi_private; 360103c1972SChristoph Hellwig struct btrfs_bio *bbio = btrfs_bio(bio); 361103c1972SChristoph Hellwig 362103c1972SChristoph Hellwig btrfs_bio_counter_dec(bioc->fs_info); 363103c1972SChristoph Hellwig bbio->mirror_num = bioc->mirror_num; 3644317ff00SQu Wenruo if (bio_op(bio) == REQ_OP_READ && bbio->inode && 3654317ff00SQu Wenruo !(bbio->bio.bi_opf & REQ_META)) 3667609afacSChristoph Hellwig btrfs_check_read_bio(bbio, NULL); 3677609afacSChristoph Hellwig else 368852eee62SChristoph Hellwig btrfs_orig_bbio_end_io(bbio); 369103c1972SChristoph Hellwig 370103c1972SChristoph Hellwig btrfs_put_bioc(bioc); 371103c1972SChristoph Hellwig } 372103c1972SChristoph Hellwig 373103c1972SChristoph Hellwig static void btrfs_orig_write_end_io(struct bio *bio) 374103c1972SChristoph Hellwig { 375103c1972SChristoph Hellwig struct btrfs_io_stripe *stripe = bio->bi_private; 376103c1972SChristoph Hellwig struct btrfs_io_context *bioc = stripe->bioc; 377103c1972SChristoph Hellwig struct btrfs_bio *bbio = btrfs_bio(bio); 378103c1972SChristoph Hellwig 379103c1972SChristoph Hellwig btrfs_bio_counter_dec(bioc->fs_info); 380103c1972SChristoph Hellwig 381103c1972SChristoph Hellwig if (bio->bi_status) { 382103c1972SChristoph Hellwig atomic_inc(&bioc->error); 383103c1972SChristoph Hellwig btrfs_log_dev_io_error(bio, stripe->dev); 384103c1972SChristoph Hellwig } 385103c1972SChristoph Hellwig 386103c1972SChristoph Hellwig /* 387103c1972SChristoph Hellwig * Only send an error to the higher layers if it is beyond the tolerance 388103c1972SChristoph Hellwig * threshold. 389103c1972SChristoph Hellwig */ 390103c1972SChristoph Hellwig if (atomic_read(&bioc->error) > bioc->max_errors) 391103c1972SChristoph Hellwig bio->bi_status = BLK_STS_IOERR; 392103c1972SChristoph Hellwig else 393103c1972SChristoph Hellwig bio->bi_status = BLK_STS_OK; 394103c1972SChristoph Hellwig 395852eee62SChristoph Hellwig btrfs_orig_bbio_end_io(bbio); 396103c1972SChristoph Hellwig btrfs_put_bioc(bioc); 397103c1972SChristoph Hellwig } 398103c1972SChristoph Hellwig 399103c1972SChristoph Hellwig static void btrfs_clone_write_end_io(struct bio *bio) 400103c1972SChristoph Hellwig { 401103c1972SChristoph Hellwig struct btrfs_io_stripe *stripe = bio->bi_private; 402103c1972SChristoph Hellwig 403103c1972SChristoph Hellwig if (bio->bi_status) { 404103c1972SChristoph Hellwig atomic_inc(&stripe->bioc->error); 405103c1972SChristoph Hellwig btrfs_log_dev_io_error(bio, stripe->dev); 406103c1972SChristoph Hellwig } 407103c1972SChristoph Hellwig 408103c1972SChristoph Hellwig /* Pass on control to the original bio this one was cloned from */ 409103c1972SChristoph Hellwig bio_endio(stripe->bioc->orig_bio); 410103c1972SChristoph Hellwig bio_put(bio); 411103c1972SChristoph Hellwig } 412103c1972SChristoph Hellwig 413103c1972SChristoph Hellwig static void btrfs_submit_dev_bio(struct btrfs_device *dev, struct bio *bio) 414103c1972SChristoph Hellwig { 415103c1972SChristoph Hellwig if (!dev || !dev->bdev || 416103c1972SChristoph Hellwig test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state) || 417103c1972SChristoph Hellwig (btrfs_op(bio) == BTRFS_MAP_WRITE && 418103c1972SChristoph Hellwig !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state))) { 419103c1972SChristoph Hellwig bio_io_error(bio); 420103c1972SChristoph Hellwig return; 421103c1972SChristoph Hellwig } 422103c1972SChristoph Hellwig 423103c1972SChristoph Hellwig bio_set_dev(bio, dev->bdev); 424103c1972SChristoph Hellwig 425103c1972SChristoph Hellwig /* 426103c1972SChristoph Hellwig * For zone append writing, bi_sector must point the beginning of the 427103c1972SChristoph Hellwig * zone 428103c1972SChristoph Hellwig */ 429103c1972SChristoph Hellwig if (bio_op(bio) == REQ_OP_ZONE_APPEND) { 430103c1972SChristoph Hellwig u64 physical = bio->bi_iter.bi_sector << SECTOR_SHIFT; 431d5e4377dSChristoph Hellwig u64 zone_start = round_down(physical, dev->fs_info->zone_size); 432103c1972SChristoph Hellwig 433d5e4377dSChristoph Hellwig ASSERT(btrfs_dev_is_sequential(dev, physical)); 434103c1972SChristoph Hellwig bio->bi_iter.bi_sector = zone_start >> SECTOR_SHIFT; 435103c1972SChristoph Hellwig } 436103c1972SChristoph Hellwig btrfs_debug_in_rcu(dev->fs_info, 437103c1972SChristoph Hellwig "%s: rw %d 0x%x, sector=%llu, dev=%lu (%s id %llu), size=%u", 438103c1972SChristoph Hellwig __func__, bio_op(bio), bio->bi_opf, bio->bi_iter.bi_sector, 439103c1972SChristoph Hellwig (unsigned long)dev->bdev->bd_dev, btrfs_dev_name(dev), 440103c1972SChristoph Hellwig dev->devid, bio->bi_iter.bi_size); 441103c1972SChristoph Hellwig 442103c1972SChristoph Hellwig btrfsic_check_bio(bio); 4433480373eSChristoph Hellwig 4443480373eSChristoph Hellwig if (bio->bi_opf & REQ_BTRFS_CGROUP_PUNT) 4453480373eSChristoph Hellwig blkcg_punt_bio_submit(bio); 4463480373eSChristoph Hellwig else 447103c1972SChristoph Hellwig submit_bio(bio); 448103c1972SChristoph Hellwig } 449103c1972SChristoph Hellwig 450103c1972SChristoph Hellwig static void btrfs_submit_mirrored_bio(struct btrfs_io_context *bioc, int dev_nr) 451103c1972SChristoph Hellwig { 452103c1972SChristoph Hellwig struct bio *orig_bio = bioc->orig_bio, *bio; 453103c1972SChristoph Hellwig 454103c1972SChristoph Hellwig ASSERT(bio_op(orig_bio) != REQ_OP_READ); 455103c1972SChristoph Hellwig 456103c1972SChristoph Hellwig /* Reuse the bio embedded into the btrfs_bio for the last mirror */ 457103c1972SChristoph Hellwig if (dev_nr == bioc->num_stripes - 1) { 458103c1972SChristoph Hellwig bio = orig_bio; 459103c1972SChristoph Hellwig bio->bi_end_io = btrfs_orig_write_end_io; 460103c1972SChristoph Hellwig } else { 461103c1972SChristoph Hellwig bio = bio_alloc_clone(NULL, orig_bio, GFP_NOFS, &fs_bio_set); 462103c1972SChristoph Hellwig bio_inc_remaining(orig_bio); 463103c1972SChristoph Hellwig bio->bi_end_io = btrfs_clone_write_end_io; 464103c1972SChristoph Hellwig } 465103c1972SChristoph Hellwig 466103c1972SChristoph Hellwig bio->bi_private = &bioc->stripes[dev_nr]; 467103c1972SChristoph Hellwig bio->bi_iter.bi_sector = bioc->stripes[dev_nr].physical >> SECTOR_SHIFT; 468103c1972SChristoph Hellwig bioc->stripes[dev_nr].bioc = bioc; 469103c1972SChristoph Hellwig btrfs_submit_dev_bio(bioc->stripes[dev_nr].dev, bio); 470103c1972SChristoph Hellwig } 471103c1972SChristoph Hellwig 472f8a53bb5SChristoph Hellwig static void __btrfs_submit_bio(struct bio *bio, struct btrfs_io_context *bioc, 473f8a53bb5SChristoph Hellwig struct btrfs_io_stripe *smap, int mirror_num) 474f8a53bb5SChristoph Hellwig { 475f8a53bb5SChristoph Hellwig /* Do not leak our private flag into the block layer. */ 476f8a53bb5SChristoph Hellwig bio->bi_opf &= ~REQ_BTRFS_ONE_ORDERED; 477f8a53bb5SChristoph Hellwig 478f8a53bb5SChristoph Hellwig if (!bioc) { 479f8a53bb5SChristoph Hellwig /* Single mirror read/write fast path. */ 480f8a53bb5SChristoph Hellwig btrfs_bio(bio)->mirror_num = mirror_num; 481f8a53bb5SChristoph Hellwig bio->bi_iter.bi_sector = smap->physical >> SECTOR_SHIFT; 482*3887653cSChristoph Hellwig if (bio_op(bio) != REQ_OP_READ) 483*3887653cSChristoph Hellwig btrfs_bio(bio)->orig_physical = smap->physical; 484f8a53bb5SChristoph Hellwig bio->bi_private = smap->dev; 485f8a53bb5SChristoph Hellwig bio->bi_end_io = btrfs_simple_end_io; 486f8a53bb5SChristoph Hellwig btrfs_submit_dev_bio(smap->dev, bio); 487f8a53bb5SChristoph Hellwig } else if (bioc->map_type & BTRFS_BLOCK_GROUP_RAID56_MASK) { 488f8a53bb5SChristoph Hellwig /* Parity RAID write or read recovery. */ 489f8a53bb5SChristoph Hellwig bio->bi_private = bioc; 490f8a53bb5SChristoph Hellwig bio->bi_end_io = btrfs_raid56_end_io; 491f8a53bb5SChristoph Hellwig if (bio_op(bio) == REQ_OP_READ) 492f8a53bb5SChristoph Hellwig raid56_parity_recover(bio, bioc, mirror_num); 493f8a53bb5SChristoph Hellwig else 494f8a53bb5SChristoph Hellwig raid56_parity_write(bio, bioc); 495f8a53bb5SChristoph Hellwig } else { 496f8a53bb5SChristoph Hellwig /* Write to multiple mirrors. */ 497f8a53bb5SChristoph Hellwig int total_devs = bioc->num_stripes; 498f8a53bb5SChristoph Hellwig 499f8a53bb5SChristoph Hellwig bioc->orig_bio = bio; 500f8a53bb5SChristoph Hellwig for (int dev_nr = 0; dev_nr < total_devs; dev_nr++) 501f8a53bb5SChristoph Hellwig btrfs_submit_mirrored_bio(bioc, dev_nr); 502f8a53bb5SChristoph Hellwig } 503f8a53bb5SChristoph Hellwig } 504f8a53bb5SChristoph Hellwig 505f8a53bb5SChristoph Hellwig static blk_status_t btrfs_bio_csum(struct btrfs_bio *bbio) 506f8a53bb5SChristoph Hellwig { 507f8a53bb5SChristoph Hellwig if (bbio->bio.bi_opf & REQ_META) 508542e300eSChristoph Hellwig return btree_csum_one_bio(bbio); 509f8a53bb5SChristoph Hellwig return btrfs_csum_one_bio(bbio); 510f8a53bb5SChristoph Hellwig } 511f8a53bb5SChristoph Hellwig 512f8a53bb5SChristoph Hellwig /* 513f8a53bb5SChristoph Hellwig * Async submit bios are used to offload expensive checksumming onto the worker 514f8a53bb5SChristoph Hellwig * threads. 515f8a53bb5SChristoph Hellwig */ 516f8a53bb5SChristoph Hellwig struct async_submit_bio { 517f8a53bb5SChristoph Hellwig struct btrfs_bio *bbio; 518f8a53bb5SChristoph Hellwig struct btrfs_io_context *bioc; 519f8a53bb5SChristoph Hellwig struct btrfs_io_stripe smap; 520f8a53bb5SChristoph Hellwig int mirror_num; 521f8a53bb5SChristoph Hellwig struct btrfs_work work; 522f8a53bb5SChristoph Hellwig }; 523f8a53bb5SChristoph Hellwig 524f8a53bb5SChristoph Hellwig /* 525f8a53bb5SChristoph Hellwig * In order to insert checksums into the metadata in large chunks, we wait 526f8a53bb5SChristoph Hellwig * until bio submission time. All the pages in the bio are checksummed and 527f8a53bb5SChristoph Hellwig * sums are attached onto the ordered extent record. 528f8a53bb5SChristoph Hellwig * 529f8a53bb5SChristoph Hellwig * At IO completion time the csums attached on the ordered extent record are 530f8a53bb5SChristoph Hellwig * inserted into the btree. 531f8a53bb5SChristoph Hellwig */ 532f8a53bb5SChristoph Hellwig static void run_one_async_start(struct btrfs_work *work) 533f8a53bb5SChristoph Hellwig { 534f8a53bb5SChristoph Hellwig struct async_submit_bio *async = 535f8a53bb5SChristoph Hellwig container_of(work, struct async_submit_bio, work); 536f8a53bb5SChristoph Hellwig blk_status_t ret; 537f8a53bb5SChristoph Hellwig 538f8a53bb5SChristoph Hellwig ret = btrfs_bio_csum(async->bbio); 539f8a53bb5SChristoph Hellwig if (ret) 540f8a53bb5SChristoph Hellwig async->bbio->bio.bi_status = ret; 541f8a53bb5SChristoph Hellwig } 542f8a53bb5SChristoph Hellwig 543f8a53bb5SChristoph Hellwig /* 544f8a53bb5SChristoph Hellwig * In order to insert checksums into the metadata in large chunks, we wait 545f8a53bb5SChristoph Hellwig * until bio submission time. All the pages in the bio are checksummed and 546f8a53bb5SChristoph Hellwig * sums are attached onto the ordered extent record. 547f8a53bb5SChristoph Hellwig * 548f8a53bb5SChristoph Hellwig * At IO completion time the csums attached on the ordered extent record are 549f8a53bb5SChristoph Hellwig * inserted into the tree. 550f8a53bb5SChristoph Hellwig */ 551f8a53bb5SChristoph Hellwig static void run_one_async_done(struct btrfs_work *work) 552f8a53bb5SChristoph Hellwig { 553f8a53bb5SChristoph Hellwig struct async_submit_bio *async = 554f8a53bb5SChristoph Hellwig container_of(work, struct async_submit_bio, work); 555f8a53bb5SChristoph Hellwig struct bio *bio = &async->bbio->bio; 556f8a53bb5SChristoph Hellwig 557f8a53bb5SChristoph Hellwig /* If an error occurred we just want to clean up the bio and move on. */ 558f8a53bb5SChristoph Hellwig if (bio->bi_status) { 559852eee62SChristoph Hellwig btrfs_orig_bbio_end_io(async->bbio); 560f8a53bb5SChristoph Hellwig return; 561f8a53bb5SChristoph Hellwig } 562f8a53bb5SChristoph Hellwig 563f8a53bb5SChristoph Hellwig /* 564f8a53bb5SChristoph Hellwig * All of the bios that pass through here are from async helpers. 5653480373eSChristoph Hellwig * Use REQ_BTRFS_CGROUP_PUNT to issue them from the owning cgroup's 5663480373eSChristoph Hellwig * context. This changes nothing when cgroups aren't in use. 567f8a53bb5SChristoph Hellwig */ 5683480373eSChristoph Hellwig bio->bi_opf |= REQ_BTRFS_CGROUP_PUNT; 569f8a53bb5SChristoph Hellwig __btrfs_submit_bio(bio, async->bioc, &async->smap, async->mirror_num); 570f8a53bb5SChristoph Hellwig } 571f8a53bb5SChristoph Hellwig 572f8a53bb5SChristoph Hellwig static void run_one_async_free(struct btrfs_work *work) 573f8a53bb5SChristoph Hellwig { 574f8a53bb5SChristoph Hellwig kfree(container_of(work, struct async_submit_bio, work)); 575f8a53bb5SChristoph Hellwig } 576f8a53bb5SChristoph Hellwig 577f8a53bb5SChristoph Hellwig static bool should_async_write(struct btrfs_bio *bbio) 578f8a53bb5SChristoph Hellwig { 579da023618SChristoph Hellwig /* Submit synchronously if the checksum implementation is fast. */ 580da023618SChristoph Hellwig if (test_bit(BTRFS_FS_CSUM_IMPL_FAST, &bbio->fs_info->flags)) 581da023618SChristoph Hellwig return false; 582da023618SChristoph Hellwig 583f8a53bb5SChristoph Hellwig /* 584e917ff56SChristoph Hellwig * Try to defer the submission to a workqueue to parallelize the 585e917ff56SChristoph Hellwig * checksum calculation unless the I/O is issued synchronously. 586f8a53bb5SChristoph Hellwig */ 587e917ff56SChristoph Hellwig if (op_is_sync(bbio->bio.bi_opf)) 588f8a53bb5SChristoph Hellwig return false; 589f8a53bb5SChristoph Hellwig 590da023618SChristoph Hellwig /* Zoned devices require I/O to be submitted in order. */ 591da023618SChristoph Hellwig if ((bbio->bio.bi_opf & REQ_META) && btrfs_is_zoned(bbio->fs_info)) 592f8a53bb5SChristoph Hellwig return false; 593f8a53bb5SChristoph Hellwig 594f8a53bb5SChristoph Hellwig return true; 595f8a53bb5SChristoph Hellwig } 596f8a53bb5SChristoph Hellwig 597f8a53bb5SChristoph Hellwig /* 598f8a53bb5SChristoph Hellwig * Submit bio to an async queue. 599f8a53bb5SChristoph Hellwig * 600f8a53bb5SChristoph Hellwig * Return true if the work has been succesfuly submitted, else false. 601f8a53bb5SChristoph Hellwig */ 602f8a53bb5SChristoph Hellwig static bool btrfs_wq_submit_bio(struct btrfs_bio *bbio, 603f8a53bb5SChristoph Hellwig struct btrfs_io_context *bioc, 604f8a53bb5SChristoph Hellwig struct btrfs_io_stripe *smap, int mirror_num) 605f8a53bb5SChristoph Hellwig { 6064317ff00SQu Wenruo struct btrfs_fs_info *fs_info = bbio->fs_info; 607f8a53bb5SChristoph Hellwig struct async_submit_bio *async; 608f8a53bb5SChristoph Hellwig 609f8a53bb5SChristoph Hellwig async = kmalloc(sizeof(*async), GFP_NOFS); 610f8a53bb5SChristoph Hellwig if (!async) 611f8a53bb5SChristoph Hellwig return false; 612f8a53bb5SChristoph Hellwig 613f8a53bb5SChristoph Hellwig async->bbio = bbio; 614f8a53bb5SChristoph Hellwig async->bioc = bioc; 615f8a53bb5SChristoph Hellwig async->smap = *smap; 616f8a53bb5SChristoph Hellwig async->mirror_num = mirror_num; 617f8a53bb5SChristoph Hellwig 618f8a53bb5SChristoph Hellwig btrfs_init_work(&async->work, run_one_async_start, run_one_async_done, 619f8a53bb5SChristoph Hellwig run_one_async_free); 620f8a53bb5SChristoph Hellwig btrfs_queue_work(fs_info->workers, &async->work); 621f8a53bb5SChristoph Hellwig return true; 622f8a53bb5SChristoph Hellwig } 623f8a53bb5SChristoph Hellwig 624ae42a154SChristoph Hellwig static bool btrfs_submit_chunk(struct btrfs_bio *bbio, int mirror_num) 625103c1972SChristoph Hellwig { 626d5e4377dSChristoph Hellwig struct btrfs_inode *inode = bbio->inode; 6274317ff00SQu Wenruo struct btrfs_fs_info *fs_info = bbio->fs_info; 628852eee62SChristoph Hellwig struct btrfs_bio *orig_bbio = bbio; 629ae42a154SChristoph Hellwig struct bio *bio = &bbio->bio; 630adbe7e38SAnand Jain u64 logical = bio->bi_iter.bi_sector << SECTOR_SHIFT; 631103c1972SChristoph Hellwig u64 length = bio->bi_iter.bi_size; 632103c1972SChristoph Hellwig u64 map_length = length; 633921603c7SChristoph Hellwig bool use_append = btrfs_use_zone_append(bbio); 634103c1972SChristoph Hellwig struct btrfs_io_context *bioc = NULL; 635103c1972SChristoph Hellwig struct btrfs_io_stripe smap; 6369ba0004bSChristoph Hellwig blk_status_t ret; 6379ba0004bSChristoph Hellwig int error; 638103c1972SChristoph Hellwig 639103c1972SChristoph Hellwig btrfs_bio_counter_inc_blocked(fs_info); 6409ba0004bSChristoph Hellwig error = __btrfs_map_block(fs_info, btrfs_op(bio), logical, &map_length, 641103c1972SChristoph Hellwig &bioc, &smap, &mirror_num, 1); 6429ba0004bSChristoph Hellwig if (error) { 6439ba0004bSChristoph Hellwig ret = errno_to_blk_status(error); 6449ba0004bSChristoph Hellwig goto fail; 645103c1972SChristoph Hellwig } 646103c1972SChristoph Hellwig 647852eee62SChristoph Hellwig map_length = min(map_length, length); 648d5e4377dSChristoph Hellwig if (use_append) 649d5e4377dSChristoph Hellwig map_length = min(map_length, fs_info->max_zone_append_size); 650d5e4377dSChristoph Hellwig 651103c1972SChristoph Hellwig if (map_length < length) { 6522cef0c79SChristoph Hellwig bbio = btrfs_split_bio(fs_info, bbio, map_length, use_append); 6532cef0c79SChristoph Hellwig bio = &bbio->bio; 654103c1972SChristoph Hellwig } 655103c1972SChristoph Hellwig 6561c2b3ee3SChristoph Hellwig /* 6571c2b3ee3SChristoph Hellwig * Save the iter for the end_io handler and preload the checksums for 6581c2b3ee3SChristoph Hellwig * data reads. 6591c2b3ee3SChristoph Hellwig */ 6604317ff00SQu Wenruo if (bio_op(bio) == REQ_OP_READ && inode && !(bio->bi_opf & REQ_META)) { 6610d3acb25SChristoph Hellwig bbio->saved_iter = bio->bi_iter; 6621c2b3ee3SChristoph Hellwig ret = btrfs_lookup_bio_sums(bbio); 6631c2b3ee3SChristoph Hellwig if (ret) 664852eee62SChristoph Hellwig goto fail_put_bio; 6651c2b3ee3SChristoph Hellwig } 6667276aa7dSChristoph Hellwig 667f8a53bb5SChristoph Hellwig if (btrfs_op(bio) == BTRFS_MAP_WRITE) { 668d5e4377dSChristoph Hellwig if (use_append) { 669d5e4377dSChristoph Hellwig bio->bi_opf &= ~REQ_OP_WRITE; 670d5e4377dSChristoph Hellwig bio->bi_opf |= REQ_OP_ZONE_APPEND; 6717edd339cSChristoph Hellwig ret = btrfs_bio_extract_ordered_extent(bbio); 67269ccf3f4SChristoph Hellwig if (ret) 673852eee62SChristoph Hellwig goto fail_put_bio; 67469ccf3f4SChristoph Hellwig } 67569ccf3f4SChristoph Hellwig 676f8a53bb5SChristoph Hellwig /* 677f8a53bb5SChristoph Hellwig * Csum items for reloc roots have already been cloned at this 678f8a53bb5SChristoph Hellwig * point, so they are handled as part of the no-checksum case. 679f8a53bb5SChristoph Hellwig */ 6804317ff00SQu Wenruo if (inode && !(inode->flags & BTRFS_INODE_NODATASUM) && 681f8a53bb5SChristoph Hellwig !test_bit(BTRFS_FS_STATE_NO_CSUMS, &fs_info->fs_state) && 682d5e4377dSChristoph Hellwig !btrfs_is_data_reloc_root(inode->root)) { 683f8a53bb5SChristoph Hellwig if (should_async_write(bbio) && 684f8a53bb5SChristoph Hellwig btrfs_wq_submit_bio(bbio, bioc, &smap, mirror_num)) 685852eee62SChristoph Hellwig goto done; 686f8c44673SChristoph Hellwig 687f8a53bb5SChristoph Hellwig ret = btrfs_bio_csum(bbio); 688f8a53bb5SChristoph Hellwig if (ret) 689852eee62SChristoph Hellwig goto fail_put_bio; 690cbfce4c7SChristoph Hellwig } else if (use_append) { 691cbfce4c7SChristoph Hellwig ret = btrfs_alloc_dummy_sum(bbio); 692cbfce4c7SChristoph Hellwig if (ret) 693cbfce4c7SChristoph Hellwig goto fail_put_bio; 694103c1972SChristoph Hellwig } 695f8a53bb5SChristoph Hellwig } 696f8a53bb5SChristoph Hellwig 697f8a53bb5SChristoph Hellwig __btrfs_submit_bio(bio, bioc, &smap, mirror_num); 698852eee62SChristoph Hellwig done: 699852eee62SChristoph Hellwig return map_length == length; 7009ba0004bSChristoph Hellwig 701852eee62SChristoph Hellwig fail_put_bio: 702852eee62SChristoph Hellwig if (map_length < length) 703852eee62SChristoph Hellwig bio_put(bio); 7049ba0004bSChristoph Hellwig fail: 7059ba0004bSChristoph Hellwig btrfs_bio_counter_dec(fs_info); 706852eee62SChristoph Hellwig btrfs_bio_end_io(orig_bbio, ret); 707852eee62SChristoph Hellwig /* Do not submit another chunk */ 708852eee62SChristoph Hellwig return true; 709852eee62SChristoph Hellwig } 710852eee62SChristoph Hellwig 711ae42a154SChristoph Hellwig void btrfs_submit_bio(struct btrfs_bio *bbio, int mirror_num) 712852eee62SChristoph Hellwig { 7134317ff00SQu Wenruo /* If bbio->inode is not populated, its file_offset must be 0. */ 7144317ff00SQu Wenruo ASSERT(bbio->inode || bbio->file_offset == 0); 7154317ff00SQu Wenruo 716ae42a154SChristoph Hellwig while (!btrfs_submit_chunk(bbio, mirror_num)) 717852eee62SChristoph Hellwig ; 718103c1972SChristoph Hellwig } 719103c1972SChristoph Hellwig 720bacf60e5SChristoph Hellwig /* 721bacf60e5SChristoph Hellwig * Submit a repair write. 722bacf60e5SChristoph Hellwig * 723bacf60e5SChristoph Hellwig * This bypasses btrfs_submit_bio deliberately, as that writes all copies in a 724bacf60e5SChristoph Hellwig * RAID setup. Here we only want to write the one bad copy, so we do the 725bacf60e5SChristoph Hellwig * mapping ourselves and submit the bio directly. 726bacf60e5SChristoph Hellwig * 72767da05b3SColin Ian King * The I/O is issued synchronously to block the repair read completion from 728bacf60e5SChristoph Hellwig * freeing the bio. 729bacf60e5SChristoph Hellwig */ 730bacf60e5SChristoph Hellwig int btrfs_repair_io_failure(struct btrfs_fs_info *fs_info, u64 ino, u64 start, 731bacf60e5SChristoph Hellwig u64 length, u64 logical, struct page *page, 732bacf60e5SChristoph Hellwig unsigned int pg_offset, int mirror_num) 733bacf60e5SChristoph Hellwig { 7344886ff7bSQu Wenruo struct btrfs_io_stripe smap = { 0 }; 735bacf60e5SChristoph Hellwig struct bio_vec bvec; 736bacf60e5SChristoph Hellwig struct bio bio; 737bacf60e5SChristoph Hellwig int ret = 0; 738bacf60e5SChristoph Hellwig 739bacf60e5SChristoph Hellwig ASSERT(!(fs_info->sb->s_flags & SB_RDONLY)); 740bacf60e5SChristoph Hellwig BUG_ON(!mirror_num); 741bacf60e5SChristoph Hellwig 742bacf60e5SChristoph Hellwig if (btrfs_repair_one_zone(fs_info, logical)) 743bacf60e5SChristoph Hellwig return 0; 744bacf60e5SChristoph Hellwig 745bacf60e5SChristoph Hellwig /* 746bacf60e5SChristoph Hellwig * Avoid races with device replace and make sure our bioc has devices 747bacf60e5SChristoph Hellwig * associated to its stripes that don't go away while we are doing the 748bacf60e5SChristoph Hellwig * read repair operation. 749bacf60e5SChristoph Hellwig */ 750bacf60e5SChristoph Hellwig btrfs_bio_counter_inc_blocked(fs_info); 7514886ff7bSQu Wenruo ret = btrfs_map_repair_block(fs_info, &smap, logical, length, mirror_num); 7524886ff7bSQu Wenruo if (ret < 0) 753bacf60e5SChristoph Hellwig goto out_counter_dec; 754bacf60e5SChristoph Hellwig 7554886ff7bSQu Wenruo if (!smap.dev->bdev || 7564886ff7bSQu Wenruo !test_bit(BTRFS_DEV_STATE_WRITEABLE, &smap.dev->dev_state)) { 757bacf60e5SChristoph Hellwig ret = -EIO; 758bacf60e5SChristoph Hellwig goto out_counter_dec; 759bacf60e5SChristoph Hellwig } 760bacf60e5SChristoph Hellwig 7614886ff7bSQu Wenruo bio_init(&bio, smap.dev->bdev, &bvec, 1, REQ_OP_WRITE | REQ_SYNC); 7624886ff7bSQu Wenruo bio.bi_iter.bi_sector = smap.physical >> SECTOR_SHIFT; 763bacf60e5SChristoph Hellwig __bio_add_page(&bio, page, length, pg_offset); 764bacf60e5SChristoph Hellwig 765bacf60e5SChristoph Hellwig btrfsic_check_bio(&bio); 766bacf60e5SChristoph Hellwig ret = submit_bio_wait(&bio); 767bacf60e5SChristoph Hellwig if (ret) { 768bacf60e5SChristoph Hellwig /* try to remap that extent elsewhere? */ 7694886ff7bSQu Wenruo btrfs_dev_stat_inc_and_print(smap.dev, BTRFS_DEV_STAT_WRITE_ERRS); 770bacf60e5SChristoph Hellwig goto out_bio_uninit; 771bacf60e5SChristoph Hellwig } 772bacf60e5SChristoph Hellwig 773bacf60e5SChristoph Hellwig btrfs_info_rl_in_rcu(fs_info, 774bacf60e5SChristoph Hellwig "read error corrected: ino %llu off %llu (dev %s sector %llu)", 7754886ff7bSQu Wenruo ino, start, btrfs_dev_name(smap.dev), 7764886ff7bSQu Wenruo smap.physical >> SECTOR_SHIFT); 777bacf60e5SChristoph Hellwig ret = 0; 778bacf60e5SChristoph Hellwig 779bacf60e5SChristoph Hellwig out_bio_uninit: 780bacf60e5SChristoph Hellwig bio_uninit(&bio); 781bacf60e5SChristoph Hellwig out_counter_dec: 782bacf60e5SChristoph Hellwig btrfs_bio_counter_dec(fs_info); 783bacf60e5SChristoph Hellwig return ret; 784bacf60e5SChristoph Hellwig } 785bacf60e5SChristoph Hellwig 7864886ff7bSQu Wenruo /* 7874886ff7bSQu Wenruo * Submit a btrfs_bio based repair write. 7884886ff7bSQu Wenruo * 7894886ff7bSQu Wenruo * If @dev_replace is true, the write would be submitted to dev-replace target. 7904886ff7bSQu Wenruo */ 7914886ff7bSQu Wenruo void btrfs_submit_repair_write(struct btrfs_bio *bbio, int mirror_num, bool dev_replace) 7924886ff7bSQu Wenruo { 7934886ff7bSQu Wenruo struct btrfs_fs_info *fs_info = bbio->fs_info; 7944886ff7bSQu Wenruo u64 logical = bbio->bio.bi_iter.bi_sector << SECTOR_SHIFT; 7954886ff7bSQu Wenruo u64 length = bbio->bio.bi_iter.bi_size; 7964886ff7bSQu Wenruo struct btrfs_io_stripe smap = { 0 }; 7974886ff7bSQu Wenruo int ret; 7984886ff7bSQu Wenruo 7994886ff7bSQu Wenruo ASSERT(fs_info); 8004886ff7bSQu Wenruo ASSERT(mirror_num > 0); 8014886ff7bSQu Wenruo ASSERT(btrfs_op(&bbio->bio) == BTRFS_MAP_WRITE); 8024886ff7bSQu Wenruo ASSERT(!bbio->inode); 8034886ff7bSQu Wenruo 8044886ff7bSQu Wenruo btrfs_bio_counter_inc_blocked(fs_info); 8054886ff7bSQu Wenruo ret = btrfs_map_repair_block(fs_info, &smap, logical, length, mirror_num); 8064886ff7bSQu Wenruo if (ret < 0) 8074886ff7bSQu Wenruo goto fail; 8084886ff7bSQu Wenruo 8094886ff7bSQu Wenruo if (dev_replace) { 8104886ff7bSQu Wenruo ASSERT(smap.dev == fs_info->dev_replace.srcdev); 8114886ff7bSQu Wenruo smap.dev = fs_info->dev_replace.tgtdev; 8124886ff7bSQu Wenruo } 8134886ff7bSQu Wenruo __btrfs_submit_bio(&bbio->bio, NULL, &smap, mirror_num); 8144886ff7bSQu Wenruo return; 8154886ff7bSQu Wenruo 8164886ff7bSQu Wenruo fail: 8174886ff7bSQu Wenruo btrfs_bio_counter_dec(fs_info); 8184886ff7bSQu Wenruo btrfs_bio_end_io(bbio, errno_to_blk_status(ret)); 8194886ff7bSQu Wenruo } 8204886ff7bSQu Wenruo 821103c1972SChristoph Hellwig int __init btrfs_bioset_init(void) 822103c1972SChristoph Hellwig { 823103c1972SChristoph Hellwig if (bioset_init(&btrfs_bioset, BIO_POOL_SIZE, 824103c1972SChristoph Hellwig offsetof(struct btrfs_bio, bio), 825103c1972SChristoph Hellwig BIOSET_NEED_BVECS)) 826103c1972SChristoph Hellwig return -ENOMEM; 827852eee62SChristoph Hellwig if (bioset_init(&btrfs_clone_bioset, BIO_POOL_SIZE, 828852eee62SChristoph Hellwig offsetof(struct btrfs_bio, bio), 0)) 829852eee62SChristoph Hellwig goto out_free_bioset; 8307609afacSChristoph Hellwig if (bioset_init(&btrfs_repair_bioset, BIO_POOL_SIZE, 8317609afacSChristoph Hellwig offsetof(struct btrfs_bio, bio), 8327609afacSChristoph Hellwig BIOSET_NEED_BVECS)) 833852eee62SChristoph Hellwig goto out_free_clone_bioset; 8347609afacSChristoph Hellwig if (mempool_init_kmalloc_pool(&btrfs_failed_bio_pool, BIO_POOL_SIZE, 8357609afacSChristoph Hellwig sizeof(struct btrfs_failed_bio))) 8367609afacSChristoph Hellwig goto out_free_repair_bioset; 837103c1972SChristoph Hellwig return 0; 8387609afacSChristoph Hellwig 8397609afacSChristoph Hellwig out_free_repair_bioset: 8407609afacSChristoph Hellwig bioset_exit(&btrfs_repair_bioset); 841852eee62SChristoph Hellwig out_free_clone_bioset: 842852eee62SChristoph Hellwig bioset_exit(&btrfs_clone_bioset); 8437609afacSChristoph Hellwig out_free_bioset: 8447609afacSChristoph Hellwig bioset_exit(&btrfs_bioset); 8457609afacSChristoph Hellwig return -ENOMEM; 846103c1972SChristoph Hellwig } 847103c1972SChristoph Hellwig 848103c1972SChristoph Hellwig void __cold btrfs_bioset_exit(void) 849103c1972SChristoph Hellwig { 8507609afacSChristoph Hellwig mempool_exit(&btrfs_failed_bio_pool); 8517609afacSChristoph Hellwig bioset_exit(&btrfs_repair_bioset); 852852eee62SChristoph Hellwig bioset_exit(&btrfs_clone_bioset); 853103c1972SChristoph Hellwig bioset_exit(&btrfs_bioset); 854103c1972SChristoph Hellwig } 855