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; 207609afacSChristoph Hellwig static struct bio_set btrfs_repair_bioset; 217609afacSChristoph Hellwig static mempool_t btrfs_failed_bio_pool; 227609afacSChristoph Hellwig 237609afacSChristoph Hellwig struct btrfs_failed_bio { 247609afacSChristoph Hellwig struct btrfs_bio *bbio; 257609afacSChristoph Hellwig int num_copies; 267609afacSChristoph Hellwig atomic_t repair_count; 277609afacSChristoph Hellwig }; 28103c1972SChristoph Hellwig 29103c1972SChristoph Hellwig /* 30103c1972SChristoph Hellwig * Initialize a btrfs_bio structure. This skips the embedded bio itself as it 31103c1972SChristoph Hellwig * is already initialized by the block layer. 32103c1972SChristoph Hellwig */ 33103c1972SChristoph Hellwig static inline void btrfs_bio_init(struct btrfs_bio *bbio, 34d0e5cb2bSChristoph Hellwig struct btrfs_inode *inode, 35103c1972SChristoph Hellwig btrfs_bio_end_io_t end_io, void *private) 36103c1972SChristoph Hellwig { 37103c1972SChristoph Hellwig memset(bbio, 0, offsetof(struct btrfs_bio, bio)); 38d0e5cb2bSChristoph Hellwig bbio->inode = inode; 39103c1972SChristoph Hellwig bbio->end_io = end_io; 40103c1972SChristoph Hellwig bbio->private = private; 41103c1972SChristoph Hellwig } 42103c1972SChristoph Hellwig 43103c1972SChristoph Hellwig /* 44103c1972SChristoph Hellwig * Allocate a btrfs_bio structure. The btrfs_bio is the main I/O container for 45103c1972SChristoph Hellwig * btrfs, and is used for all I/O submitted through btrfs_submit_bio. 46103c1972SChristoph Hellwig * 47103c1972SChristoph Hellwig * Just like the underlying bio_alloc_bioset it will not fail as it is backed by 48103c1972SChristoph Hellwig * a mempool. 49103c1972SChristoph Hellwig */ 50103c1972SChristoph Hellwig struct bio *btrfs_bio_alloc(unsigned int nr_vecs, blk_opf_t opf, 51d0e5cb2bSChristoph Hellwig struct btrfs_inode *inode, 52103c1972SChristoph Hellwig btrfs_bio_end_io_t end_io, void *private) 53103c1972SChristoph Hellwig { 54103c1972SChristoph Hellwig struct bio *bio; 55103c1972SChristoph Hellwig 56103c1972SChristoph Hellwig bio = bio_alloc_bioset(NULL, nr_vecs, opf, GFP_NOFS, &btrfs_bioset); 57d0e5cb2bSChristoph Hellwig btrfs_bio_init(btrfs_bio(bio), inode, end_io, private); 58103c1972SChristoph Hellwig return bio; 59103c1972SChristoph Hellwig } 60103c1972SChristoph Hellwig 61103c1972SChristoph Hellwig struct bio *btrfs_bio_clone_partial(struct bio *orig, u64 offset, u64 size, 62d0e5cb2bSChristoph Hellwig struct btrfs_inode *inode, 63103c1972SChristoph Hellwig btrfs_bio_end_io_t end_io, void *private) 64103c1972SChristoph Hellwig { 65103c1972SChristoph Hellwig struct bio *bio; 66103c1972SChristoph Hellwig struct btrfs_bio *bbio; 67103c1972SChristoph Hellwig 68103c1972SChristoph Hellwig ASSERT(offset <= UINT_MAX && size <= UINT_MAX); 69103c1972SChristoph Hellwig 70103c1972SChristoph Hellwig bio = bio_alloc_clone(orig->bi_bdev, orig, GFP_NOFS, &btrfs_bioset); 71103c1972SChristoph Hellwig bbio = btrfs_bio(bio); 72d0e5cb2bSChristoph Hellwig btrfs_bio_init(bbio, inode, end_io, private); 73103c1972SChristoph Hellwig 74103c1972SChristoph Hellwig bio_trim(bio, offset >> 9, size >> 9); 75103c1972SChristoph Hellwig return bio; 76103c1972SChristoph Hellwig } 77103c1972SChristoph Hellwig 787609afacSChristoph Hellwig static int next_repair_mirror(struct btrfs_failed_bio *fbio, int cur_mirror) 797609afacSChristoph Hellwig { 807609afacSChristoph Hellwig if (cur_mirror == fbio->num_copies) 817609afacSChristoph Hellwig return cur_mirror + 1 - fbio->num_copies; 827609afacSChristoph Hellwig return cur_mirror + 1; 837609afacSChristoph Hellwig } 847609afacSChristoph Hellwig 857609afacSChristoph Hellwig static int prev_repair_mirror(struct btrfs_failed_bio *fbio, int cur_mirror) 867609afacSChristoph Hellwig { 877609afacSChristoph Hellwig if (cur_mirror == 1) 887609afacSChristoph Hellwig return fbio->num_copies; 897609afacSChristoph Hellwig return cur_mirror - 1; 907609afacSChristoph Hellwig } 917609afacSChristoph Hellwig 927609afacSChristoph Hellwig static void btrfs_repair_done(struct btrfs_failed_bio *fbio) 937609afacSChristoph Hellwig { 947609afacSChristoph Hellwig if (atomic_dec_and_test(&fbio->repair_count)) { 957609afacSChristoph Hellwig fbio->bbio->end_io(fbio->bbio); 967609afacSChristoph Hellwig mempool_free(fbio, &btrfs_failed_bio_pool); 977609afacSChristoph Hellwig } 987609afacSChristoph Hellwig } 997609afacSChristoph Hellwig 1007609afacSChristoph Hellwig static void btrfs_end_repair_bio(struct btrfs_bio *repair_bbio, 1017609afacSChristoph Hellwig struct btrfs_device *dev) 1027609afacSChristoph Hellwig { 1037609afacSChristoph Hellwig struct btrfs_failed_bio *fbio = repair_bbio->private; 1047609afacSChristoph Hellwig struct btrfs_inode *inode = repair_bbio->inode; 1057609afacSChristoph Hellwig struct btrfs_fs_info *fs_info = inode->root->fs_info; 1067609afacSChristoph Hellwig struct bio_vec *bv = bio_first_bvec_all(&repair_bbio->bio); 1077609afacSChristoph Hellwig int mirror = repair_bbio->mirror_num; 1087609afacSChristoph Hellwig 1097609afacSChristoph Hellwig if (repair_bbio->bio.bi_status || 1107609afacSChristoph Hellwig !btrfs_data_csum_ok(repair_bbio, dev, 0, bv)) { 1117609afacSChristoph Hellwig bio_reset(&repair_bbio->bio, NULL, REQ_OP_READ); 1127609afacSChristoph Hellwig repair_bbio->bio.bi_iter = repair_bbio->iter; 1137609afacSChristoph Hellwig 1147609afacSChristoph Hellwig mirror = next_repair_mirror(fbio, mirror); 1157609afacSChristoph Hellwig if (mirror == fbio->bbio->mirror_num) { 1167609afacSChristoph Hellwig btrfs_debug(fs_info, "no mirror left"); 1177609afacSChristoph Hellwig fbio->bbio->bio.bi_status = BLK_STS_IOERR; 1187609afacSChristoph Hellwig goto done; 1197609afacSChristoph Hellwig } 1207609afacSChristoph Hellwig 1217609afacSChristoph Hellwig btrfs_submit_bio(fs_info, &repair_bbio->bio, mirror); 1227609afacSChristoph Hellwig return; 1237609afacSChristoph Hellwig } 1247609afacSChristoph Hellwig 1257609afacSChristoph Hellwig do { 1267609afacSChristoph Hellwig mirror = prev_repair_mirror(fbio, mirror); 1277609afacSChristoph Hellwig btrfs_repair_io_failure(fs_info, btrfs_ino(inode), 1287609afacSChristoph Hellwig repair_bbio->file_offset, fs_info->sectorsize, 1297609afacSChristoph Hellwig repair_bbio->iter.bi_sector << SECTOR_SHIFT, 1307609afacSChristoph Hellwig bv->bv_page, bv->bv_offset, mirror); 1317609afacSChristoph Hellwig } while (mirror != fbio->bbio->mirror_num); 1327609afacSChristoph Hellwig 1337609afacSChristoph Hellwig done: 1347609afacSChristoph Hellwig btrfs_repair_done(fbio); 1357609afacSChristoph Hellwig bio_put(&repair_bbio->bio); 1367609afacSChristoph Hellwig } 1377609afacSChristoph Hellwig 1387609afacSChristoph Hellwig /* 1397609afacSChristoph Hellwig * Try to kick off a repair read to the next available mirror for a bad sector. 1407609afacSChristoph Hellwig * 1417609afacSChristoph Hellwig * This primarily tries to recover good data to serve the actual read request, 1427609afacSChristoph Hellwig * but also tries to write the good data back to the bad mirror(s) when a 1437609afacSChristoph Hellwig * read succeeded to restore the redundancy. 1447609afacSChristoph Hellwig */ 1457609afacSChristoph Hellwig static struct btrfs_failed_bio *repair_one_sector(struct btrfs_bio *failed_bbio, 1467609afacSChristoph Hellwig u32 bio_offset, 1477609afacSChristoph Hellwig struct bio_vec *bv, 1487609afacSChristoph Hellwig struct btrfs_failed_bio *fbio) 1497609afacSChristoph Hellwig { 1507609afacSChristoph Hellwig struct btrfs_inode *inode = failed_bbio->inode; 1517609afacSChristoph Hellwig struct btrfs_fs_info *fs_info = inode->root->fs_info; 1527609afacSChristoph Hellwig const u32 sectorsize = fs_info->sectorsize; 1537609afacSChristoph Hellwig const u64 logical = (failed_bbio->iter.bi_sector << SECTOR_SHIFT); 1547609afacSChristoph Hellwig struct btrfs_bio *repair_bbio; 1557609afacSChristoph Hellwig struct bio *repair_bio; 1567609afacSChristoph Hellwig int num_copies; 1577609afacSChristoph Hellwig int mirror; 1587609afacSChristoph Hellwig 1597609afacSChristoph Hellwig btrfs_debug(fs_info, "repair read error: read error at %llu", 1607609afacSChristoph Hellwig failed_bbio->file_offset + bio_offset); 1617609afacSChristoph Hellwig 1627609afacSChristoph Hellwig num_copies = btrfs_num_copies(fs_info, logical, sectorsize); 1637609afacSChristoph Hellwig if (num_copies == 1) { 1647609afacSChristoph Hellwig btrfs_debug(fs_info, "no copy to repair from"); 1657609afacSChristoph Hellwig failed_bbio->bio.bi_status = BLK_STS_IOERR; 1667609afacSChristoph Hellwig return fbio; 1677609afacSChristoph Hellwig } 1687609afacSChristoph Hellwig 1697609afacSChristoph Hellwig if (!fbio) { 1707609afacSChristoph Hellwig fbio = mempool_alloc(&btrfs_failed_bio_pool, GFP_NOFS); 1717609afacSChristoph Hellwig fbio->bbio = failed_bbio; 1727609afacSChristoph Hellwig fbio->num_copies = num_copies; 1737609afacSChristoph Hellwig atomic_set(&fbio->repair_count, 1); 1747609afacSChristoph Hellwig } 1757609afacSChristoph Hellwig 1767609afacSChristoph Hellwig atomic_inc(&fbio->repair_count); 1777609afacSChristoph Hellwig 1787609afacSChristoph Hellwig repair_bio = bio_alloc_bioset(NULL, 1, REQ_OP_READ, GFP_NOFS, 1797609afacSChristoph Hellwig &btrfs_repair_bioset); 1807609afacSChristoph Hellwig repair_bio->bi_iter.bi_sector = failed_bbio->iter.bi_sector; 1817609afacSChristoph Hellwig bio_add_page(repair_bio, bv->bv_page, bv->bv_len, bv->bv_offset); 1827609afacSChristoph Hellwig 1837609afacSChristoph Hellwig repair_bbio = btrfs_bio(repair_bio); 1847609afacSChristoph Hellwig btrfs_bio_init(repair_bbio, failed_bbio->inode, NULL, fbio); 1857609afacSChristoph Hellwig repair_bbio->file_offset = failed_bbio->file_offset + bio_offset; 1867609afacSChristoph Hellwig 1877609afacSChristoph Hellwig mirror = next_repair_mirror(fbio, failed_bbio->mirror_num); 1887609afacSChristoph Hellwig btrfs_debug(fs_info, "submitting repair read to mirror %d", mirror); 1897609afacSChristoph Hellwig btrfs_submit_bio(fs_info, repair_bio, mirror); 1907609afacSChristoph Hellwig return fbio; 1917609afacSChristoph Hellwig } 1927609afacSChristoph Hellwig 1937609afacSChristoph Hellwig static void btrfs_check_read_bio(struct btrfs_bio *bbio, struct btrfs_device *dev) 1947609afacSChristoph Hellwig { 1957609afacSChristoph Hellwig struct btrfs_inode *inode = bbio->inode; 1967609afacSChristoph Hellwig struct btrfs_fs_info *fs_info = inode->root->fs_info; 1977609afacSChristoph Hellwig u32 sectorsize = fs_info->sectorsize; 1987609afacSChristoph Hellwig struct bvec_iter *iter = &bbio->iter; 1997609afacSChristoph Hellwig blk_status_t status = bbio->bio.bi_status; 2007609afacSChristoph Hellwig struct btrfs_failed_bio *fbio = NULL; 2017609afacSChristoph Hellwig u32 offset = 0; 2027609afacSChristoph Hellwig 2037609afacSChristoph Hellwig /* 2047609afacSChristoph Hellwig * Hand off repair bios to the repair code as there is no upper level 2057609afacSChristoph Hellwig * submitter for them. 2067609afacSChristoph Hellwig */ 2077609afacSChristoph Hellwig if (bbio->bio.bi_pool == &btrfs_repair_bioset) { 2087609afacSChristoph Hellwig btrfs_end_repair_bio(bbio, dev); 2097609afacSChristoph Hellwig return; 2107609afacSChristoph Hellwig } 2117609afacSChristoph Hellwig 2127609afacSChristoph Hellwig /* Clear the I/O error. A failed repair will reset it. */ 2137609afacSChristoph Hellwig bbio->bio.bi_status = BLK_STS_OK; 2147609afacSChristoph Hellwig 2157609afacSChristoph Hellwig while (iter->bi_size) { 2167609afacSChristoph Hellwig struct bio_vec bv = bio_iter_iovec(&bbio->bio, *iter); 2177609afacSChristoph Hellwig 2187609afacSChristoph Hellwig bv.bv_len = min(bv.bv_len, sectorsize); 2197609afacSChristoph Hellwig if (status || !btrfs_data_csum_ok(bbio, dev, offset, &bv)) 2207609afacSChristoph Hellwig fbio = repair_one_sector(bbio, offset, &bv, fbio); 2217609afacSChristoph Hellwig 2227609afacSChristoph Hellwig bio_advance_iter_single(&bbio->bio, iter, sectorsize); 2237609afacSChristoph Hellwig offset += sectorsize; 2247609afacSChristoph Hellwig } 2257609afacSChristoph Hellwig 226*7ab0fdfcSChristoph Hellwig if (bbio->csum != bbio->csum_inline) 227*7ab0fdfcSChristoph Hellwig kfree(bbio->csum); 2287609afacSChristoph Hellwig 2297609afacSChristoph Hellwig if (fbio) 2307609afacSChristoph Hellwig btrfs_repair_done(fbio); 2317609afacSChristoph Hellwig else 2327609afacSChristoph Hellwig bbio->end_io(bbio); 2337609afacSChristoph Hellwig } 2347609afacSChristoph Hellwig 235103c1972SChristoph Hellwig static void btrfs_log_dev_io_error(struct bio *bio, struct btrfs_device *dev) 236103c1972SChristoph Hellwig { 237103c1972SChristoph Hellwig if (!dev || !dev->bdev) 238103c1972SChristoph Hellwig return; 239103c1972SChristoph Hellwig if (bio->bi_status != BLK_STS_IOERR && bio->bi_status != BLK_STS_TARGET) 240103c1972SChristoph Hellwig return; 241103c1972SChristoph Hellwig 242103c1972SChristoph Hellwig if (btrfs_op(bio) == BTRFS_MAP_WRITE) 243103c1972SChristoph Hellwig btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_WRITE_ERRS); 244103c1972SChristoph Hellwig if (!(bio->bi_opf & REQ_RAHEAD)) 245103c1972SChristoph Hellwig btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_READ_ERRS); 246103c1972SChristoph Hellwig if (bio->bi_opf & REQ_PREFLUSH) 247103c1972SChristoph Hellwig btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_FLUSH_ERRS); 248103c1972SChristoph Hellwig } 249103c1972SChristoph Hellwig 250103c1972SChristoph Hellwig static struct workqueue_struct *btrfs_end_io_wq(struct btrfs_fs_info *fs_info, 251103c1972SChristoph Hellwig struct bio *bio) 252103c1972SChristoph Hellwig { 253103c1972SChristoph Hellwig if (bio->bi_opf & REQ_META) 254103c1972SChristoph Hellwig return fs_info->endio_meta_workers; 255103c1972SChristoph Hellwig return fs_info->endio_workers; 256103c1972SChristoph Hellwig } 257103c1972SChristoph Hellwig 258103c1972SChristoph Hellwig static void btrfs_end_bio_work(struct work_struct *work) 259103c1972SChristoph Hellwig { 260103c1972SChristoph Hellwig struct btrfs_bio *bbio = container_of(work, struct btrfs_bio, end_io_work); 261103c1972SChristoph Hellwig 2627609afacSChristoph Hellwig /* Metadata reads are checked and repaired by the submitter. */ 2637609afacSChristoph Hellwig if (bbio->bio.bi_opf & REQ_META) 264103c1972SChristoph Hellwig bbio->end_io(bbio); 2657609afacSChristoph Hellwig else 2667609afacSChristoph Hellwig btrfs_check_read_bio(bbio, bbio->device); 267103c1972SChristoph Hellwig } 268103c1972SChristoph Hellwig 269103c1972SChristoph Hellwig static void btrfs_simple_end_io(struct bio *bio) 270103c1972SChristoph Hellwig { 271103c1972SChristoph Hellwig struct btrfs_fs_info *fs_info = bio->bi_private; 272103c1972SChristoph Hellwig struct btrfs_bio *bbio = btrfs_bio(bio); 273103c1972SChristoph Hellwig 274103c1972SChristoph Hellwig btrfs_bio_counter_dec(fs_info); 275103c1972SChristoph Hellwig 276103c1972SChristoph Hellwig if (bio->bi_status) 277103c1972SChristoph Hellwig btrfs_log_dev_io_error(bio, bbio->device); 278103c1972SChristoph Hellwig 279103c1972SChristoph Hellwig if (bio_op(bio) == REQ_OP_READ) { 280103c1972SChristoph Hellwig INIT_WORK(&bbio->end_io_work, btrfs_end_bio_work); 281103c1972SChristoph Hellwig queue_work(btrfs_end_io_wq(fs_info, bio), &bbio->end_io_work); 282103c1972SChristoph Hellwig } else { 283103c1972SChristoph Hellwig bbio->end_io(bbio); 284103c1972SChristoph Hellwig } 285103c1972SChristoph Hellwig } 286103c1972SChristoph Hellwig 287103c1972SChristoph Hellwig static void btrfs_raid56_end_io(struct bio *bio) 288103c1972SChristoph Hellwig { 289103c1972SChristoph Hellwig struct btrfs_io_context *bioc = bio->bi_private; 290103c1972SChristoph Hellwig struct btrfs_bio *bbio = btrfs_bio(bio); 291103c1972SChristoph Hellwig 292103c1972SChristoph Hellwig btrfs_bio_counter_dec(bioc->fs_info); 293103c1972SChristoph Hellwig bbio->mirror_num = bioc->mirror_num; 2947609afacSChristoph Hellwig if (bio_op(bio) == REQ_OP_READ && !(bbio->bio.bi_opf & REQ_META)) 2957609afacSChristoph Hellwig btrfs_check_read_bio(bbio, NULL); 2967609afacSChristoph Hellwig else 297103c1972SChristoph Hellwig bbio->end_io(bbio); 298103c1972SChristoph Hellwig 299103c1972SChristoph Hellwig btrfs_put_bioc(bioc); 300103c1972SChristoph Hellwig } 301103c1972SChristoph Hellwig 302103c1972SChristoph Hellwig static void btrfs_orig_write_end_io(struct bio *bio) 303103c1972SChristoph Hellwig { 304103c1972SChristoph Hellwig struct btrfs_io_stripe *stripe = bio->bi_private; 305103c1972SChristoph Hellwig struct btrfs_io_context *bioc = stripe->bioc; 306103c1972SChristoph Hellwig struct btrfs_bio *bbio = btrfs_bio(bio); 307103c1972SChristoph Hellwig 308103c1972SChristoph Hellwig btrfs_bio_counter_dec(bioc->fs_info); 309103c1972SChristoph Hellwig 310103c1972SChristoph Hellwig if (bio->bi_status) { 311103c1972SChristoph Hellwig atomic_inc(&bioc->error); 312103c1972SChristoph Hellwig btrfs_log_dev_io_error(bio, stripe->dev); 313103c1972SChristoph Hellwig } 314103c1972SChristoph Hellwig 315103c1972SChristoph Hellwig /* 316103c1972SChristoph Hellwig * Only send an error to the higher layers if it is beyond the tolerance 317103c1972SChristoph Hellwig * threshold. 318103c1972SChristoph Hellwig */ 319103c1972SChristoph Hellwig if (atomic_read(&bioc->error) > bioc->max_errors) 320103c1972SChristoph Hellwig bio->bi_status = BLK_STS_IOERR; 321103c1972SChristoph Hellwig else 322103c1972SChristoph Hellwig bio->bi_status = BLK_STS_OK; 323103c1972SChristoph Hellwig 324103c1972SChristoph Hellwig bbio->end_io(bbio); 325103c1972SChristoph Hellwig btrfs_put_bioc(bioc); 326103c1972SChristoph Hellwig } 327103c1972SChristoph Hellwig 328103c1972SChristoph Hellwig static void btrfs_clone_write_end_io(struct bio *bio) 329103c1972SChristoph Hellwig { 330103c1972SChristoph Hellwig struct btrfs_io_stripe *stripe = bio->bi_private; 331103c1972SChristoph Hellwig 332103c1972SChristoph Hellwig if (bio->bi_status) { 333103c1972SChristoph Hellwig atomic_inc(&stripe->bioc->error); 334103c1972SChristoph Hellwig btrfs_log_dev_io_error(bio, stripe->dev); 335103c1972SChristoph Hellwig } 336103c1972SChristoph Hellwig 337103c1972SChristoph Hellwig /* Pass on control to the original bio this one was cloned from */ 338103c1972SChristoph Hellwig bio_endio(stripe->bioc->orig_bio); 339103c1972SChristoph Hellwig bio_put(bio); 340103c1972SChristoph Hellwig } 341103c1972SChristoph Hellwig 342103c1972SChristoph Hellwig static void btrfs_submit_dev_bio(struct btrfs_device *dev, struct bio *bio) 343103c1972SChristoph Hellwig { 344103c1972SChristoph Hellwig if (!dev || !dev->bdev || 345103c1972SChristoph Hellwig test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state) || 346103c1972SChristoph Hellwig (btrfs_op(bio) == BTRFS_MAP_WRITE && 347103c1972SChristoph Hellwig !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state))) { 348103c1972SChristoph Hellwig bio_io_error(bio); 349103c1972SChristoph Hellwig return; 350103c1972SChristoph Hellwig } 351103c1972SChristoph Hellwig 352103c1972SChristoph Hellwig bio_set_dev(bio, dev->bdev); 353103c1972SChristoph Hellwig 354103c1972SChristoph Hellwig /* 355103c1972SChristoph Hellwig * For zone append writing, bi_sector must point the beginning of the 356103c1972SChristoph Hellwig * zone 357103c1972SChristoph Hellwig */ 358103c1972SChristoph Hellwig if (bio_op(bio) == REQ_OP_ZONE_APPEND) { 359103c1972SChristoph Hellwig u64 physical = bio->bi_iter.bi_sector << SECTOR_SHIFT; 360103c1972SChristoph Hellwig 361103c1972SChristoph Hellwig if (btrfs_dev_is_sequential(dev, physical)) { 362103c1972SChristoph Hellwig u64 zone_start = round_down(physical, 363103c1972SChristoph Hellwig dev->fs_info->zone_size); 364103c1972SChristoph Hellwig 365103c1972SChristoph Hellwig bio->bi_iter.bi_sector = zone_start >> SECTOR_SHIFT; 366103c1972SChristoph Hellwig } else { 367103c1972SChristoph Hellwig bio->bi_opf &= ~REQ_OP_ZONE_APPEND; 368103c1972SChristoph Hellwig bio->bi_opf |= REQ_OP_WRITE; 369103c1972SChristoph Hellwig } 370103c1972SChristoph Hellwig } 371103c1972SChristoph Hellwig btrfs_debug_in_rcu(dev->fs_info, 372103c1972SChristoph Hellwig "%s: rw %d 0x%x, sector=%llu, dev=%lu (%s id %llu), size=%u", 373103c1972SChristoph Hellwig __func__, bio_op(bio), bio->bi_opf, bio->bi_iter.bi_sector, 374103c1972SChristoph Hellwig (unsigned long)dev->bdev->bd_dev, btrfs_dev_name(dev), 375103c1972SChristoph Hellwig dev->devid, bio->bi_iter.bi_size); 376103c1972SChristoph Hellwig 377103c1972SChristoph Hellwig btrfsic_check_bio(bio); 378103c1972SChristoph Hellwig submit_bio(bio); 379103c1972SChristoph Hellwig } 380103c1972SChristoph Hellwig 381103c1972SChristoph Hellwig static void btrfs_submit_mirrored_bio(struct btrfs_io_context *bioc, int dev_nr) 382103c1972SChristoph Hellwig { 383103c1972SChristoph Hellwig struct bio *orig_bio = bioc->orig_bio, *bio; 384103c1972SChristoph Hellwig 385103c1972SChristoph Hellwig ASSERT(bio_op(orig_bio) != REQ_OP_READ); 386103c1972SChristoph Hellwig 387103c1972SChristoph Hellwig /* Reuse the bio embedded into the btrfs_bio for the last mirror */ 388103c1972SChristoph Hellwig if (dev_nr == bioc->num_stripes - 1) { 389103c1972SChristoph Hellwig bio = orig_bio; 390103c1972SChristoph Hellwig bio->bi_end_io = btrfs_orig_write_end_io; 391103c1972SChristoph Hellwig } else { 392103c1972SChristoph Hellwig bio = bio_alloc_clone(NULL, orig_bio, GFP_NOFS, &fs_bio_set); 393103c1972SChristoph Hellwig bio_inc_remaining(orig_bio); 394103c1972SChristoph Hellwig bio->bi_end_io = btrfs_clone_write_end_io; 395103c1972SChristoph Hellwig } 396103c1972SChristoph Hellwig 397103c1972SChristoph Hellwig bio->bi_private = &bioc->stripes[dev_nr]; 398103c1972SChristoph Hellwig bio->bi_iter.bi_sector = bioc->stripes[dev_nr].physical >> SECTOR_SHIFT; 399103c1972SChristoph Hellwig bioc->stripes[dev_nr].bioc = bioc; 400103c1972SChristoph Hellwig btrfs_submit_dev_bio(bioc->stripes[dev_nr].dev, bio); 401103c1972SChristoph Hellwig } 402103c1972SChristoph Hellwig 403103c1972SChristoph Hellwig void btrfs_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio, int mirror_num) 404103c1972SChristoph Hellwig { 4059ba0004bSChristoph Hellwig struct btrfs_bio *bbio = btrfs_bio(bio); 406103c1972SChristoph Hellwig u64 logical = bio->bi_iter.bi_sector << 9; 407103c1972SChristoph Hellwig u64 length = bio->bi_iter.bi_size; 408103c1972SChristoph Hellwig u64 map_length = length; 409103c1972SChristoph Hellwig struct btrfs_io_context *bioc = NULL; 410103c1972SChristoph Hellwig struct btrfs_io_stripe smap; 4119ba0004bSChristoph Hellwig blk_status_t ret; 4129ba0004bSChristoph Hellwig int error; 413103c1972SChristoph Hellwig 414103c1972SChristoph Hellwig btrfs_bio_counter_inc_blocked(fs_info); 4159ba0004bSChristoph Hellwig error = __btrfs_map_block(fs_info, btrfs_op(bio), logical, &map_length, 416103c1972SChristoph Hellwig &bioc, &smap, &mirror_num, 1); 4179ba0004bSChristoph Hellwig if (error) { 4189ba0004bSChristoph Hellwig ret = errno_to_blk_status(error); 4199ba0004bSChristoph Hellwig goto fail; 420103c1972SChristoph Hellwig } 421103c1972SChristoph Hellwig 422103c1972SChristoph Hellwig if (map_length < length) { 423103c1972SChristoph Hellwig btrfs_crit(fs_info, 424103c1972SChristoph Hellwig "mapping failed logical %llu bio len %llu len %llu", 425103c1972SChristoph Hellwig logical, length, map_length); 426103c1972SChristoph Hellwig BUG(); 427103c1972SChristoph Hellwig } 428103c1972SChristoph Hellwig 4291c2b3ee3SChristoph Hellwig /* 4301c2b3ee3SChristoph Hellwig * Save the iter for the end_io handler and preload the checksums for 4311c2b3ee3SChristoph Hellwig * data reads. 4321c2b3ee3SChristoph Hellwig */ 4331c2b3ee3SChristoph Hellwig if (bio_op(bio) == REQ_OP_READ && !(bio->bi_opf & REQ_META)) { 4347276aa7dSChristoph Hellwig bbio->iter = bio->bi_iter; 4351c2b3ee3SChristoph Hellwig ret = btrfs_lookup_bio_sums(bbio); 4361c2b3ee3SChristoph Hellwig if (ret) 4371c2b3ee3SChristoph Hellwig goto fail; 4381c2b3ee3SChristoph Hellwig } 4397276aa7dSChristoph Hellwig 440103c1972SChristoph Hellwig if (!bioc) { 441103c1972SChristoph Hellwig /* Single mirror read/write fast path */ 4429ba0004bSChristoph Hellwig bbio->mirror_num = mirror_num; 4439ba0004bSChristoph Hellwig bbio->device = smap.dev; 444103c1972SChristoph Hellwig bio->bi_iter.bi_sector = smap.physical >> SECTOR_SHIFT; 445103c1972SChristoph Hellwig bio->bi_private = fs_info; 446103c1972SChristoph Hellwig bio->bi_end_io = btrfs_simple_end_io; 447103c1972SChristoph Hellwig btrfs_submit_dev_bio(smap.dev, bio); 448103c1972SChristoph Hellwig } else if (bioc->map_type & BTRFS_BLOCK_GROUP_RAID56_MASK) { 449103c1972SChristoph Hellwig /* Parity RAID write or read recovery */ 450103c1972SChristoph Hellwig bio->bi_private = bioc; 451103c1972SChristoph Hellwig bio->bi_end_io = btrfs_raid56_end_io; 452103c1972SChristoph Hellwig if (bio_op(bio) == REQ_OP_READ) 453103c1972SChristoph Hellwig raid56_parity_recover(bio, bioc, mirror_num); 454103c1972SChristoph Hellwig else 455103c1972SChristoph Hellwig raid56_parity_write(bio, bioc); 456103c1972SChristoph Hellwig } else { 457103c1972SChristoph Hellwig /* Write to multiple mirrors */ 458103c1972SChristoph Hellwig int total_devs = bioc->num_stripes; 459103c1972SChristoph Hellwig int dev_nr; 460103c1972SChristoph Hellwig 461103c1972SChristoph Hellwig bioc->orig_bio = bio; 462103c1972SChristoph Hellwig for (dev_nr = 0; dev_nr < total_devs; dev_nr++) 463103c1972SChristoph Hellwig btrfs_submit_mirrored_bio(bioc, dev_nr); 464103c1972SChristoph Hellwig } 4659ba0004bSChristoph Hellwig return; 4669ba0004bSChristoph Hellwig 4679ba0004bSChristoph Hellwig fail: 4689ba0004bSChristoph Hellwig btrfs_bio_counter_dec(fs_info); 4699ba0004bSChristoph Hellwig btrfs_bio_end_io(bbio, ret); 470103c1972SChristoph Hellwig } 471103c1972SChristoph Hellwig 472bacf60e5SChristoph Hellwig /* 473bacf60e5SChristoph Hellwig * Submit a repair write. 474bacf60e5SChristoph Hellwig * 475bacf60e5SChristoph Hellwig * This bypasses btrfs_submit_bio deliberately, as that writes all copies in a 476bacf60e5SChristoph Hellwig * RAID setup. Here we only want to write the one bad copy, so we do the 477bacf60e5SChristoph Hellwig * mapping ourselves and submit the bio directly. 478bacf60e5SChristoph Hellwig * 47967da05b3SColin Ian King * The I/O is issued synchronously to block the repair read completion from 480bacf60e5SChristoph Hellwig * freeing the bio. 481bacf60e5SChristoph Hellwig */ 482bacf60e5SChristoph Hellwig int btrfs_repair_io_failure(struct btrfs_fs_info *fs_info, u64 ino, u64 start, 483bacf60e5SChristoph Hellwig u64 length, u64 logical, struct page *page, 484bacf60e5SChristoph Hellwig unsigned int pg_offset, int mirror_num) 485bacf60e5SChristoph Hellwig { 486bacf60e5SChristoph Hellwig struct btrfs_device *dev; 487bacf60e5SChristoph Hellwig struct bio_vec bvec; 488bacf60e5SChristoph Hellwig struct bio bio; 489bacf60e5SChristoph Hellwig u64 map_length = 0; 490bacf60e5SChristoph Hellwig u64 sector; 491bacf60e5SChristoph Hellwig struct btrfs_io_context *bioc = NULL; 492bacf60e5SChristoph Hellwig int ret = 0; 493bacf60e5SChristoph Hellwig 494bacf60e5SChristoph Hellwig ASSERT(!(fs_info->sb->s_flags & SB_RDONLY)); 495bacf60e5SChristoph Hellwig BUG_ON(!mirror_num); 496bacf60e5SChristoph Hellwig 497bacf60e5SChristoph Hellwig if (btrfs_repair_one_zone(fs_info, logical)) 498bacf60e5SChristoph Hellwig return 0; 499bacf60e5SChristoph Hellwig 500bacf60e5SChristoph Hellwig map_length = length; 501bacf60e5SChristoph Hellwig 502bacf60e5SChristoph Hellwig /* 503bacf60e5SChristoph Hellwig * Avoid races with device replace and make sure our bioc has devices 504bacf60e5SChristoph Hellwig * associated to its stripes that don't go away while we are doing the 505bacf60e5SChristoph Hellwig * read repair operation. 506bacf60e5SChristoph Hellwig */ 507bacf60e5SChristoph Hellwig btrfs_bio_counter_inc_blocked(fs_info); 508bacf60e5SChristoph Hellwig if (btrfs_is_parity_mirror(fs_info, logical, length)) { 509bacf60e5SChristoph Hellwig /* 510bacf60e5SChristoph Hellwig * Note that we don't use BTRFS_MAP_WRITE because it's supposed 511bacf60e5SChristoph Hellwig * to update all raid stripes, but here we just want to correct 512bacf60e5SChristoph Hellwig * bad stripe, thus BTRFS_MAP_READ is abused to only get the bad 513bacf60e5SChristoph Hellwig * stripe's dev and sector. 514bacf60e5SChristoph Hellwig */ 515bacf60e5SChristoph Hellwig ret = btrfs_map_block(fs_info, BTRFS_MAP_READ, logical, 516bacf60e5SChristoph Hellwig &map_length, &bioc, 0); 517bacf60e5SChristoph Hellwig if (ret) 518bacf60e5SChristoph Hellwig goto out_counter_dec; 519bacf60e5SChristoph Hellwig ASSERT(bioc->mirror_num == 1); 520bacf60e5SChristoph Hellwig } else { 521bacf60e5SChristoph Hellwig ret = btrfs_map_block(fs_info, BTRFS_MAP_WRITE, logical, 522bacf60e5SChristoph Hellwig &map_length, &bioc, mirror_num); 523bacf60e5SChristoph Hellwig if (ret) 524bacf60e5SChristoph Hellwig goto out_counter_dec; 525d73a27b8SQu Wenruo /* 526d73a27b8SQu Wenruo * This happens when dev-replace is also running, and the 527d73a27b8SQu Wenruo * mirror_num indicates the dev-replace target. 528d73a27b8SQu Wenruo * 529d73a27b8SQu Wenruo * In this case, we don't need to do anything, as the read 530d73a27b8SQu Wenruo * error just means the replace progress hasn't reached our 531d73a27b8SQu Wenruo * read range, and later replace routine would handle it well. 532d73a27b8SQu Wenruo */ 533d73a27b8SQu Wenruo if (mirror_num != bioc->mirror_num) 534d73a27b8SQu Wenruo goto out_counter_dec; 535bacf60e5SChristoph Hellwig } 536bacf60e5SChristoph Hellwig 537bacf60e5SChristoph Hellwig sector = bioc->stripes[bioc->mirror_num - 1].physical >> 9; 538bacf60e5SChristoph Hellwig dev = bioc->stripes[bioc->mirror_num - 1].dev; 539bacf60e5SChristoph Hellwig btrfs_put_bioc(bioc); 540bacf60e5SChristoph Hellwig 541bacf60e5SChristoph Hellwig if (!dev || !dev->bdev || 542bacf60e5SChristoph Hellwig !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) { 543bacf60e5SChristoph Hellwig ret = -EIO; 544bacf60e5SChristoph Hellwig goto out_counter_dec; 545bacf60e5SChristoph Hellwig } 546bacf60e5SChristoph Hellwig 547bacf60e5SChristoph Hellwig bio_init(&bio, dev->bdev, &bvec, 1, REQ_OP_WRITE | REQ_SYNC); 548bacf60e5SChristoph Hellwig bio.bi_iter.bi_sector = sector; 549bacf60e5SChristoph Hellwig __bio_add_page(&bio, page, length, pg_offset); 550bacf60e5SChristoph Hellwig 551bacf60e5SChristoph Hellwig btrfsic_check_bio(&bio); 552bacf60e5SChristoph Hellwig ret = submit_bio_wait(&bio); 553bacf60e5SChristoph Hellwig if (ret) { 554bacf60e5SChristoph Hellwig /* try to remap that extent elsewhere? */ 555bacf60e5SChristoph Hellwig btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_WRITE_ERRS); 556bacf60e5SChristoph Hellwig goto out_bio_uninit; 557bacf60e5SChristoph Hellwig } 558bacf60e5SChristoph Hellwig 559bacf60e5SChristoph Hellwig btrfs_info_rl_in_rcu(fs_info, 560bacf60e5SChristoph Hellwig "read error corrected: ino %llu off %llu (dev %s sector %llu)", 561bacf60e5SChristoph Hellwig ino, start, btrfs_dev_name(dev), sector); 562bacf60e5SChristoph Hellwig ret = 0; 563bacf60e5SChristoph Hellwig 564bacf60e5SChristoph Hellwig out_bio_uninit: 565bacf60e5SChristoph Hellwig bio_uninit(&bio); 566bacf60e5SChristoph Hellwig out_counter_dec: 567bacf60e5SChristoph Hellwig btrfs_bio_counter_dec(fs_info); 568bacf60e5SChristoph Hellwig return ret; 569bacf60e5SChristoph Hellwig } 570bacf60e5SChristoph Hellwig 571103c1972SChristoph Hellwig int __init btrfs_bioset_init(void) 572103c1972SChristoph Hellwig { 573103c1972SChristoph Hellwig if (bioset_init(&btrfs_bioset, BIO_POOL_SIZE, 574103c1972SChristoph Hellwig offsetof(struct btrfs_bio, bio), 575103c1972SChristoph Hellwig BIOSET_NEED_BVECS)) 576103c1972SChristoph Hellwig return -ENOMEM; 5777609afacSChristoph Hellwig if (bioset_init(&btrfs_repair_bioset, BIO_POOL_SIZE, 5787609afacSChristoph Hellwig offsetof(struct btrfs_bio, bio), 5797609afacSChristoph Hellwig BIOSET_NEED_BVECS)) 5807609afacSChristoph Hellwig goto out_free_bioset; 5817609afacSChristoph Hellwig if (mempool_init_kmalloc_pool(&btrfs_failed_bio_pool, BIO_POOL_SIZE, 5827609afacSChristoph Hellwig sizeof(struct btrfs_failed_bio))) 5837609afacSChristoph Hellwig goto out_free_repair_bioset; 584103c1972SChristoph Hellwig return 0; 5857609afacSChristoph Hellwig 5867609afacSChristoph Hellwig out_free_repair_bioset: 5877609afacSChristoph Hellwig bioset_exit(&btrfs_repair_bioset); 5887609afacSChristoph Hellwig out_free_bioset: 5897609afacSChristoph Hellwig bioset_exit(&btrfs_bioset); 5907609afacSChristoph Hellwig return -ENOMEM; 591103c1972SChristoph Hellwig } 592103c1972SChristoph Hellwig 593103c1972SChristoph Hellwig void __cold btrfs_bioset_exit(void) 594103c1972SChristoph Hellwig { 5957609afacSChristoph Hellwig mempool_exit(&btrfs_failed_bio_pool); 5967609afacSChristoph Hellwig bioset_exit(&btrfs_repair_bioset); 597103c1972SChristoph Hellwig bioset_exit(&btrfs_bioset); 598103c1972SChristoph Hellwig } 599