diff options
Diffstat (limited to 'fs/btrfs/extent_io.c')
| -rw-r--r-- | fs/btrfs/extent_io.c | 27 |
1 files changed, 20 insertions, 7 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 9472d3de5e5..be1bf627a14 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -2287,14 +2287,20 @@ static void end_bio_extent_readpage(struct bio *bio, int err) if (!uptodate) { int failed_mirror; failed_mirror = (int)(unsigned long)bio->bi_bdev; - if (tree->ops && tree->ops->readpage_io_failed_hook) - ret = tree->ops->readpage_io_failed_hook( - bio, page, start, end, - failed_mirror, state); - else - ret = bio_readpage_error(bio, page, start, end, - failed_mirror, NULL); + /* + * 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, page, start, end, + failed_mirror, NULL); if (ret == 0) { +error_handled: uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); if (err) @@ -2302,6 +2308,13 @@ static void end_bio_extent_readpage(struct bio *bio, int err) uncache_state(&cached); continue; } + if (tree->ops && tree->ops->readpage_io_failed_hook) { + ret = tree->ops->readpage_io_failed_hook( + bio, page, start, end, + failed_mirror, state); + if (ret == 0) + goto error_handled; + } } if (uptodate) { |