diff options
Diffstat (limited to 'fs/btrfs/extent_io.c')
| -rw-r--r-- | fs/btrfs/extent_io.c | 71 |
1 files changed, 35 insertions, 36 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index aef3c9866ff0..582b4b1c41e0 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -2333,13 +2333,11 @@ struct bio *btrfs_create_repair_bio(struct inode *inode, struct bio *failed_bio, } /* - * this is a generic handler for readpage errors (default - * readpage_io_failed_hook). if other copies exist, read those and write back - * good data to the failed position. does not investigate in remapping the - * failed extent elsewhere, hoping the device will be smart enough to do this as - * needed + * This is a generic handler for readpage errors. If other copies exist, read + * those and write back good data to the failed position. Does not investigate + * in remapping the failed extent elsewhere, hoping the device will be smart + * enough to do this as needed */ - static int bio_readpage_error(struct bio *failed_bio, u64 phy_offset, struct page *page, u64 start, u64 end, int failed_mirror) @@ -2501,6 +2499,8 @@ static void end_bio_extent_readpage(struct bio *bio) struct page *page = bvec->bv_page; struct inode *inode = page->mapping->host; struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); + bool data_inode = btrfs_ino(BTRFS_I(inode)) + != BTRFS_BTREE_INODE_OBJECTID; btrfs_debug(fs_info, "end_bio_extent_readpage: bi_sector=%llu, err=%d, mirror=%u", @@ -2530,7 +2530,7 @@ static void end_bio_extent_readpage(struct bio *bio) len = bvec->bv_len; mirror = io_bio->mirror_num; - if (likely(uptodate && tree->ops)) { + if (likely(uptodate)) { ret = tree->ops->readpage_end_io_hook(io_bio, offset, page, start, end, mirror); @@ -2546,38 +2546,37 @@ static void end_bio_extent_readpage(struct bio *bio) if (likely(uptodate)) goto readpage_ok; - if (tree->ops) { - ret = tree->ops->readpage_io_failed_hook(page, mirror); - if (ret == -EAGAIN) { - /* - * Data inode's readpage_io_failed_hook() always - * returns -EAGAIN. - * - * The generic bio_readpage_error handles errors - * the following way: If possible, new read - * requests are created and submitted and will - * end up in end_bio_extent_readpage as well (if - * we're lucky, not in the !uptodate case). In - * that case it returns 0 and we just go on with - * the next page in our bio. If it can't handle - * the error it will return -EIO and we remain - * responsible for that page. - */ - ret = bio_readpage_error(bio, offset, page, - start, end, mirror); - if (ret == 0) { - uptodate = !bio->bi_status; - offset += len; - continue; - } - } + if (data_inode) { /* - * metadata's readpage_io_failed_hook() always returns - * -EIO and fixes nothing. -EIO is also returned if - * data inode error could not be fixed. + * The generic bio_readpage_error handles errors the + * following way: If possible, new read requests are + * created and submitted and will end up in + * end_bio_extent_readpage as well (if we're lucky, + * not in the !uptodate case). In that case it returns + * 0 and we just go on with the next page in our bio. + * If it can't handle the error it will return -EIO and + * we remain responsible for that page. */ - ASSERT(ret == -EIO); + ret = bio_readpage_error(bio, offset, page, start, end, + mirror); + if (ret == 0) { + uptodate = !bio->bi_status; + offset += len; + continue; + } + } else { + struct extent_buffer *eb; + + eb = (struct extent_buffer *)page->private; + set_bit(EXTENT_BUFFER_READ_ERR, &eb->bflags); + eb->read_mirror = mirror; + atomic_dec(&eb->io_pages); + if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD, + &eb->bflags)) + btree_readahead_hook(eb, -EIO); + + ret = -EIO; } readpage_ok: if (likely(uptodate)) { |