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| author | Eric Blake <eblake@redhat.com> | 2017-10-05 14:02:46 -0500 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2017-10-06 16:28:58 +0200 |
| commit | d855ebcd3cca4080a81aeec9c0a27af006734280 (patch) | |
| tree | 09118affc256052bc8504ac07d945ccd2055aa97 | |
| parent | 8803714b53243816e96a759de3cfd22625230023 (diff) | |
| download | qemu-d855ebcd3cca4080a81aeec9c0a27af006734280.zip qemu-d855ebcd3cca4080a81aeec9c0a27af006734280.tar.gz qemu-d855ebcd3cca4080a81aeec9c0a27af006734280.tar.bz2 | |
block: Add blkdebug hook for copy-on-read
Make it possible to inject errors on writes performed during a
read operation due to copy-on-read semantics.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| -rw-r--r-- | block/io.c | 1 | ||||
| -rw-r--r-- | qapi/block-core.json | 5 |
2 files changed, 5 insertions, 1 deletions
@@ -983,6 +983,7 @@ static int coroutine_fn bdrv_co_do_copy_on_readv(BdrvChild *child, goto err; } + bdrv_debug_event(bs, BLKDBG_COR_WRITE); if (drv->bdrv_co_pwrite_zeroes && buffer_is_zero(bounce_buffer, iov.iov_len)) { /* FIXME: Should we (perhaps conditionally) be setting diff --git a/qapi/block-core.json b/qapi/block-core.json index 750bb0c..ab96e34 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -2538,6 +2538,8 @@ # # @l1_shrink_free_l2_clusters: discard the l2 tables. (since 2.11) # +# @cor_write: a write due to copy-on-read (since 2.11) +# # Since: 2.9 ## { 'enum': 'BlkdebugEvent', 'prefix': 'BLKDBG', @@ -2555,7 +2557,8 @@ 'flush_to_disk', 'pwritev_rmw_head', 'pwritev_rmw_after_head', 'pwritev_rmw_tail', 'pwritev_rmw_after_tail', 'pwritev', 'pwritev_zero', 'pwritev_done', 'empty_image_prepare', - 'l1_shrink_write_table', 'l1_shrink_free_l2_clusters' ] } + 'l1_shrink_write_table', 'l1_shrink_free_l2_clusters', + 'cor_write'] } ## # @BlkdebugInjectErrorOptions: |