Btrfs: in scrub repair code, simplify alloc error handling
In the scrub repair code, the code is changed to handle memory allocation errors a little bit smarter. The change is to handle it just like a read error. This simplifies the code and removes a couple of lines of code, since the code to handle read errors is there anyway. Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
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@ -151,10 +151,10 @@ static int scrub_setup_recheck_block(struct scrub_ctx *sctx,
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struct btrfs_mapping_tree *map_tree,
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u64 length, u64 logical,
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struct scrub_block *sblock);
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static int scrub_recheck_block(struct btrfs_fs_info *fs_info,
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struct scrub_block *sblock, int is_metadata,
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int have_csum, u8 *csum, u64 generation,
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u16 csum_size);
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static void scrub_recheck_block(struct btrfs_fs_info *fs_info,
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struct scrub_block *sblock, int is_metadata,
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int have_csum, u8 *csum, u64 generation,
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u16 csum_size);
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static void scrub_recheck_block_checksum(struct btrfs_fs_info *fs_info,
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struct scrub_block *sblock,
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int is_metadata, int have_csum,
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@ -718,16 +718,8 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check)
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sblock_bad = sblocks_for_recheck + failed_mirror_index;
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/* build and submit the bios for the failed mirror, check checksums */
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ret = scrub_recheck_block(fs_info, sblock_bad, is_metadata, have_csum,
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csum, generation, sctx->csum_size);
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if (ret) {
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spin_lock(&sctx->stat_lock);
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sctx->stat.read_errors++;
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sctx->stat.uncorrectable_errors++;
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spin_unlock(&sctx->stat_lock);
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btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_READ_ERRS);
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goto out;
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}
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scrub_recheck_block(fs_info, sblock_bad, is_metadata, have_csum,
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csum, generation, sctx->csum_size);
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if (!sblock_bad->header_error && !sblock_bad->checksum_error &&
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sblock_bad->no_io_error_seen) {
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@ -843,10 +835,11 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check)
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sblock_other = sblocks_for_recheck + mirror_index;
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/* build and submit the bios, check checksums */
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ret = scrub_recheck_block(fs_info, sblock_other, is_metadata,
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have_csum, csum, generation,
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sctx->csum_size);
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if (!ret && !sblock_other->header_error &&
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scrub_recheck_block(fs_info, sblock_other, is_metadata,
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have_csum, csum, generation,
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sctx->csum_size);
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if (!sblock_other->header_error &&
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!sblock_other->checksum_error &&
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sblock_other->no_io_error_seen) {
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int force_write = is_metadata || have_csum;
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@ -931,10 +924,10 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check)
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* is verified, but most likely the data comes out
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* of the page cache.
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*/
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ret = scrub_recheck_block(fs_info, sblock_bad,
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is_metadata, have_csum, csum,
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generation, sctx->csum_size);
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if (!ret && !sblock_bad->header_error &&
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scrub_recheck_block(fs_info, sblock_bad,
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is_metadata, have_csum, csum,
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generation, sctx->csum_size);
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if (!sblock_bad->header_error &&
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!sblock_bad->checksum_error &&
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sblock_bad->no_io_error_seen)
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goto corrected_error;
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@ -1061,10 +1054,10 @@ leave_nomem:
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* to take those pages that are not errored from all the mirrors so that
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* the pages that are errored in the just handled mirror can be repaired.
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*/
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static int scrub_recheck_block(struct btrfs_fs_info *fs_info,
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struct scrub_block *sblock, int is_metadata,
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int have_csum, u8 *csum, u64 generation,
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u16 csum_size)
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static void scrub_recheck_block(struct btrfs_fs_info *fs_info,
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struct scrub_block *sblock, int is_metadata,
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int have_csum, u8 *csum, u64 generation,
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u16 csum_size)
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{
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int page_num;
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@ -1074,7 +1067,6 @@ static int scrub_recheck_block(struct btrfs_fs_info *fs_info,
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for (page_num = 0; page_num < sblock->page_count; page_num++) {
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struct bio *bio;
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int ret;
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struct scrub_page *page = sblock->pagev[page_num];
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DECLARE_COMPLETION_ONSTACK(complete);
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@ -1086,18 +1078,17 @@ static int scrub_recheck_block(struct btrfs_fs_info *fs_info,
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WARN_ON(!page->page);
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bio = bio_alloc(GFP_NOFS, 1);
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if (!bio)
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return -EIO;
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if (!bio) {
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page->io_error = 1;
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sblock->no_io_error_seen = 0;
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continue;
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}
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bio->bi_bdev = page->dev->bdev;
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bio->bi_sector = page->physical >> 9;
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bio->bi_end_io = scrub_complete_bio_end_io;
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bio->bi_private = &complete;
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ret = bio_add_page(bio, page->page, PAGE_SIZE, 0);
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if (PAGE_SIZE != ret) {
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bio_put(bio);
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return -EIO;
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}
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bio_add_page(bio, page->page, PAGE_SIZE, 0);
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btrfsic_submit_bio(READ, bio);
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/* this will also unplug the queue */
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@ -1114,7 +1105,7 @@ static int scrub_recheck_block(struct btrfs_fs_info *fs_info,
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have_csum, csum, generation,
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csum_size);
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return 0;
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return;
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}
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static void scrub_recheck_block_checksum(struct btrfs_fs_info *fs_info,
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