diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/extent_io.c | 119 | ||||
| -rw-r--r-- | fs/btrfs/extent_io.h | 3 |
2 files changed, 21 insertions, 101 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 848dd54535f6..ce6364dd1517 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -2381,13 +2381,6 @@ int clean_io_failure(struct btrfs_fs_info *fs_info, BUG_ON(!failrec->this_mirror); - if (failrec->in_validation) { - /* there was no real error, just free the record */ - btrfs_debug(fs_info, - "clean_io_failure: freeing dummy error at %llu", - failrec->start); - goto out; - } if (sb_rdonly(fs_info->sb)) goto out; @@ -2464,9 +2457,8 @@ static struct io_failure_record *btrfs_get_io_failure_record(struct inode *inode failrec = get_state_failrec(failure_tree, start); if (!IS_ERR(failrec)) { btrfs_debug(fs_info, - "Get IO Failure Record: (found) logical=%llu, start=%llu, len=%llu, validation=%d", - failrec->logical, failrec->start, failrec->len, - failrec->in_validation); + "Get IO Failure Record: (found) logical=%llu, start=%llu, len=%llu", + failrec->logical, failrec->start, failrec->len); /* * when data can be on disk more than twice, add to failrec here * (e.g. with a list for failed_mirror) to make @@ -2484,7 +2476,6 @@ static struct io_failure_record *btrfs_get_io_failure_record(struct inode *inode failrec->len = sectorsize; failrec->this_mirror = 0; failrec->bio_flags = 0; - failrec->in_validation = 0; read_lock(&em_tree->lock); em = lookup_extent_mapping(em_tree, start, failrec->len); @@ -2535,7 +2526,7 @@ static struct io_failure_record *btrfs_get_io_failure_record(struct inode *inode return failrec; } -static bool btrfs_check_repairable(struct inode *inode, bool needs_validation, +static bool btrfs_check_repairable(struct inode *inode, struct io_failure_record *failrec, int failed_mirror) { @@ -2555,39 +2546,22 @@ static bool btrfs_check_repairable(struct inode *inode, bool needs_validation, return false; } + /* The failure record should only contain one sector */ + ASSERT(failrec->len == fs_info->sectorsize); + /* - * there are two premises: - * a) deliver good data to the caller - * b) correct the bad sectors on disk + * There are two premises: + * a) deliver good data to the caller + * b) correct the bad sectors on disk + * + * Since we're only doing repair for one sector, we only need to get + * a good copy of the failed sector and if we succeed, we have setup + * everything for repair_io_failure to do the rest for us. */ - if (needs_validation) { - /* - * to fulfill b), we need to know the exact failing sectors, as - * we don't want to rewrite any more than the failed ones. thus, - * we need separate read requests for the failed bio - * - * if the following BUG_ON triggers, our validation request got - * merged. we need separate requests for our algorithm to work. - */ - BUG_ON(failrec->in_validation); - failrec->in_validation = 1; - failrec->this_mirror = failed_mirror; - } else { - /* - * we're ready to fulfill a) and b) alongside. get a good copy - * of the failed sector and if we succeed, we have setup - * everything for repair_io_failure to do the rest for us. - */ - if (failrec->in_validation) { - BUG_ON(failrec->this_mirror != failed_mirror); - failrec->in_validation = 0; - failrec->this_mirror = 0; - } - failrec->failed_mirror = failed_mirror; + failrec->failed_mirror = failed_mirror; + failrec->this_mirror++; + if (failrec->this_mirror == failed_mirror) failrec->this_mirror++; - if (failrec->this_mirror == failed_mirror) - failrec->this_mirror++; - } if (failrec->this_mirror > num_copies) { btrfs_debug(fs_info, @@ -2599,48 +2573,6 @@ static bool btrfs_check_repairable(struct inode *inode, bool needs_validation, return true; } -static bool btrfs_io_needs_validation(struct inode *inode, struct bio *bio) -{ - u64 len = 0; - const u32 blocksize = inode->i_sb->s_blocksize; - - /* - * If bi_status is BLK_STS_OK, then this was a checksum error, not an - * I/O error. In this case, we already know exactly which sector was - * bad, so we don't need to validate. - */ - if (bio->bi_status == BLK_STS_OK) - return false; - - /* - * We need to validate each sector individually if the failed I/O was - * for multiple sectors. - * - * There are a few possible bios that can end up here: - * 1. A buffered read bio, which is not cloned. - * 2. A direct I/O read bio, which is cloned. - * 3. A (buffered or direct) repair bio, which is not cloned. - * - * For cloned bios (case 2), we can get the size from - * btrfs_io_bio->iter; for non-cloned bios (cases 1 and 3), we can get - * it from the bvecs. - */ - if (bio_flagged(bio, BIO_CLONED)) { - if (btrfs_io_bio(bio)->iter.bi_size > blocksize) - return true; - } else { - struct bio_vec *bvec; - int i; - - bio_for_each_bvec_all(bvec, bio, i) { - len += bvec->bv_len; - if (len > blocksize) - return true; - } - } - return false; -} - int btrfs_repair_one_sector(struct inode *inode, struct bio *failed_bio, u32 bio_offset, struct page *page, unsigned int pgoff, @@ -2653,7 +2585,6 @@ int btrfs_repair_one_sector(struct inode *inode, struct extent_io_tree *failure_tree = &BTRFS_I(inode)->io_failure_tree; struct btrfs_io_bio *failed_io_bio = btrfs_io_bio(failed_bio); const int icsum = bio_offset >> fs_info->sectorsize_bits; - bool need_validation; struct bio *repair_bio; struct btrfs_io_bio *repair_io_bio; blk_status_t status; @@ -2667,16 +2598,8 @@ int btrfs_repair_one_sector(struct inode *inode, if (IS_ERR(failrec)) return PTR_ERR(failrec); - /* - * We will only submit repair for one sector, thus we don't need - * extra validation anymore. - * - * TODO: All those extra validation related code will be cleaned up - * later. - */ - need_validation = false; - if (!btrfs_check_repairable(inode, need_validation, failrec, - failed_mirror)) { + + if (!btrfs_check_repairable(inode, failrec, failed_mirror)) { free_io_failure(failure_tree, tree, failrec); return -EIO; } @@ -2684,8 +2607,6 @@ int btrfs_repair_one_sector(struct inode *inode, repair_bio = btrfs_io_bio_alloc(1); repair_io_bio = btrfs_io_bio(repair_bio); repair_bio->bi_opf = REQ_OP_READ; - if (need_validation) - repair_bio->bi_opf |= REQ_FAILFAST_DEV; repair_bio->bi_end_io = failed_bio->bi_end_io; repair_bio->bi_iter.bi_sector = failrec->logical >> 9; repair_bio->bi_private = failed_bio->bi_private; @@ -2703,8 +2624,8 @@ int btrfs_repair_one_sector(struct inode *inode, repair_io_bio->iter = repair_bio->bi_iter; btrfs_debug(btrfs_sb(inode->i_sb), -"repair read error: submitting new read to mirror %d, in_validation=%d", - failrec->this_mirror, failrec->in_validation); + "repair read error: submitting new read to mirror %d", + failrec->this_mirror); status = submit_bio_hook(inode, repair_bio, failrec->this_mirror, failrec->bio_flags); diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index bbb4ef4d0934..fb9a9275fc41 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -281,7 +281,7 @@ int btrfs_repair_eb_io_failure(const struct extent_buffer *eb, int mirror_num); * When IO fails, either with EIO or csum verification fails, we * try other mirrors that might have a good copy of the data. This * io_failure_record is used to record state as we go through all the - * mirrors. If another mirror has good data, the page is set up to date + * mirrors. If another mirror has good data, the sector is set up to date * and things continue. If a good mirror can't be found, the original * bio end_io callback is called to indicate things have failed. */ @@ -293,7 +293,6 @@ struct io_failure_record { unsigned long bio_flags; int this_mirror; int failed_mirror; - int in_validation; }; int btrfs_repair_one_sector(struct inode *inode, |