From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51476) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eGpI8-0002hQ-GS for qemu-devel@nongnu.org; Mon, 20 Nov 2017 11:51:29 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eGpI4-0003sI-4a for qemu-devel@nongnu.org; Mon, 20 Nov 2017 11:51:28 -0500 From: Anton Nefedov Date: Mon, 20 Nov 2017 19:51:03 +0300 Message-Id: <1511196664-85304-7-git-send-email-anton.nefedov@virtuozzo.com> In-Reply-To: <1511196664-85304-1-git-send-email-anton.nefedov@virtuozzo.com> References: <1511196664-85304-1-git-send-email-anton.nefedov@virtuozzo.com> MIME-Version: 1.0 Content-Type: text/plain Subject: [Qemu-devel] [PATCH 6/7] file-posix: account discard operations List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, qemu-block@nongnu.org Cc: kwolf@redhat.com, mreitz@redhat.com, armbru@redhat.com, jsnow@redhat.com, pbonzini@redhat.com, eblake@redhat.com, den@virtuozzo.com, Anton Nefedov This will help to identify how many of the user-issued discard operations (accounted on a device level) have actually suceeded down on the host file (even though the numbers will not be exactly the same if non-raw format driver is used (e.g. qcow2 sending metadata discards)). Signed-off-by: Anton Nefedov Reviewed-by: Vladimir Sementsov-Ogievskiy --- block/file-posix.c | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) diff --git a/block/file-posix.c b/block/file-posix.c index 36ee89e..544ae58 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -158,6 +158,11 @@ typedef struct BDRVRawState { bool page_cache_inconsistent:1; bool has_fallocate; bool needs_alignment; + struct { + int64_t discard_nb_ok; + int64_t discard_nb_failed; + int64_t discard_bytes_ok; + } stats; PRManager *pr_mgr; } BDRVRawState; @@ -1458,6 +1463,16 @@ static ssize_t handle_aiocb_discard(RawPosixAIOData *aiocb) return ret; } +static void raw_account_discard(BDRVRawState *s, uint64_t nbytes, int ret) +{ + if (ret) { + s->stats.discard_nb_failed++; + } else { + s->stats.discard_nb_ok++; + s->stats.discard_bytes_ok += nbytes; + } +} + static int aio_worker(void *arg) { RawPosixAIOData *aiocb = arg; @@ -1494,6 +1509,7 @@ static int aio_worker(void *arg) break; case QEMU_AIO_DISCARD: ret = handle_aiocb_discard(aiocb); + raw_account_discard(aiocb->bs->opaque, aiocb->aio_nbytes, ret); break; case QEMU_AIO_WRITE_ZEROES: ret = handle_aiocb_write_zeroes(aiocb); @@ -2654,8 +2670,9 @@ static coroutine_fn BlockAIOCB *hdev_aio_pdiscard(BlockDriverState *bs, BlockCompletionFunc *cb, void *opaque) { BDRVRawState *s = bs->opaque; - - if (fd_open(bs) < 0) { + int ret = fd_open(bs); + if (ret < 0) { + raw_account_discard(s, bytes, ret); return NULL; } return paio_submit(bs, s->fd, offset, NULL, bytes, -- 2.7.4