From: Jeff Cody <jcody@redhat.com>
To: Cleber Rosa <crosa@redhat.com>
Cc: qemu-block@nongnu.org, Kevin Wolf <kwolf@redhat.com>,
Max Reitz <mreitz@redhat.com>, Fam Zheng <famz@redhat.com>,
qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [Qemu-block] [PATCH 1/1] qemu-iotests/109: Fix lock race condition
Date: Tue, 1 Aug 2017 17:54:37 -0400 [thread overview]
Message-ID: <20170801215437.GD22129@localhost.localdomain> (raw)
In-Reply-To: <20170801213127.15036-2-crosa@redhat.com>
On Tue, Aug 01, 2017 at 05:31:27PM -0400, Cleber Rosa wrote:
> A race condition is currently present between the clean up attempt of
> the QEMU process and the execution of qemu-img. The actual (bad)
> output is:
>
> -Warning: Image size mismatch!
> -Images are identical.
> +qemu-img: Could not open '<build_dir>/tests/qemu-iotests/scratch/t.raw': Failed to get "consistent read" lock
> +Is another process using the image?
>
> A KILL signal is sent to the QEMU process, but qemu-img may begin to
> run before the QEMU process is really gone. qemu-img will then
> attempt to open the TEST_IMG file before it can secure a lock on it.
>
> This attempts a more graceful shutdown, and waits for the QEMU process
> to exit.
>
> Signed-off-by: Cleber Rosa <crosa@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
> ---
> tests/qemu-iotests/109 | 3 ++-
> tests/qemu-iotests/109.out | 56 ++++++++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 58 insertions(+), 1 deletion(-)
>
> diff --git a/tests/qemu-iotests/109 b/tests/qemu-iotests/109
> index 3b496a3..d70b574 100755
> --- a/tests/qemu-iotests/109
> +++ b/tests/qemu-iotests/109
> @@ -67,7 +67,8 @@ function run_qemu()
> _send_qemu_cmd $QEMU_HANDLE '' "BLOCK_JOB_COMPLETED"
> fi
> _send_qemu_cmd $QEMU_HANDLE '{"execute":"query-block-jobs"}' "return"
> - _cleanup_qemu
> + _send_qemu_cmd $QEMU_HANDLE '{"execute":"quit"}' "return"
> + wait=1 _cleanup_qemu
> }
>
> for fmt in qcow qcow2 qed vdi vmdk vpc; do
> diff --git a/tests/qemu-iotests/109.out b/tests/qemu-iotests/109.out
> index dc02f9e..c189e28 100644
> --- a/tests/qemu-iotests/109.out
> +++ b/tests/qemu-iotests/109.out
> @@ -12,12 +12,17 @@ Specify the 'raw' format explicitly to remove the restrictions.
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_ERROR", "data": {"device": "src", "operation": "write", "action": "report"}}
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "src", "len": LEN, "offset": 0, "speed": 0, "type": "mirror", "error": "Operation not permitted"}}
> {"return": []}
> +{"return": {}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}
> read 65536/65536 bytes at offset 0
> 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> {"return": {}}
> {"return": {}}
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "src", "len": 1024, "offset": 1024, "speed": 0, "type": "mirror"}}
> {"return": [{"io-status": "ok", "device": "src", "busy": false, "len": 1024, "offset": 1024, "paused": false, "speed": 0, "ready": true, "type": "mirror"}]}
> +{"return": {}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "src", "len": 1024, "offset": 1024, "speed": 0, "type": "mirror"}}
> Warning: Image size mismatch!
> Images are identical.
>
> @@ -33,12 +38,17 @@ Specify the 'raw' format explicitly to remove the restrictions.
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_ERROR", "data": {"device": "src", "operation": "write", "action": "report"}}
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "src", "len": LEN, "offset": 512, "speed": 0, "type": "mirror", "error": "Operation not permitted"}}
> {"return": []}
> +{"return": {}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}
> read 65536/65536 bytes at offset 0
> 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> {"return": {}}
> {"return": {}}
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "src", "len": 197120, "offset": 197120, "speed": 0, "type": "mirror"}}
> {"return": [{"io-status": "ok", "device": "src", "busy": false, "len": 197120, "offset": 197120, "paused": false, "speed": 0, "ready": true, "type": "mirror"}]}
> +{"return": {}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "src", "len": 197120, "offset": 197120, "speed": 0, "type": "mirror"}}
> Warning: Image size mismatch!
> Images are identical.
>
> @@ -54,12 +64,17 @@ Specify the 'raw' format explicitly to remove the restrictions.
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_ERROR", "data": {"device": "src", "operation": "write", "action": "report"}}
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "src", "len": LEN, "offset": 262144, "speed": 0, "type": "mirror", "error": "Operation not permitted"}}
> {"return": []}
> +{"return": {}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}
> read 65536/65536 bytes at offset 0
> 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> {"return": {}}
> {"return": {}}
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "src", "len": 327680, "offset": 327680, "speed": 0, "type": "mirror"}}
> {"return": [{"io-status": "ok", "device": "src", "busy": false, "len": 327680, "offset": 327680, "paused": false, "speed": 0, "ready": true, "type": "mirror"}]}
> +{"return": {}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "src", "len": 327680, "offset": 327680, "speed": 0, "type": "mirror"}}
> Warning: Image size mismatch!
> Images are identical.
>
> @@ -75,12 +90,17 @@ Specify the 'raw' format explicitly to remove the restrictions.
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_ERROR", "data": {"device": "src", "operation": "write", "action": "report"}}
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "src", "len": LEN, "offset": 0, "speed": 0, "type": "mirror", "error": "Operation not permitted"}}
> {"return": []}
> +{"return": {}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}
> read 65536/65536 bytes at offset 0
> 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> {"return": {}}
> {"return": {}}
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "src", "len": 1024, "offset": 1024, "speed": 0, "type": "mirror"}}
> {"return": [{"io-status": "ok", "device": "src", "busy": false, "len": 1024, "offset": 1024, "paused": false, "speed": 0, "ready": true, "type": "mirror"}]}
> +{"return": {}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "src", "len": 1024, "offset": 1024, "speed": 0, "type": "mirror"}}
> Warning: Image size mismatch!
> Images are identical.
>
> @@ -96,12 +116,17 @@ Specify the 'raw' format explicitly to remove the restrictions.
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_ERROR", "data": {"device": "src", "operation": "write", "action": "report"}}
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "src", "len": LEN, "offset": 0, "speed": 0, "type": "mirror", "error": "Operation not permitted"}}
> {"return": []}
> +{"return": {}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}
> read 65536/65536 bytes at offset 0
> 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> {"return": {}}
> {"return": {}}
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "src", "len": 65536, "offset": 65536, "speed": 0, "type": "mirror"}}
> {"return": [{"io-status": "ok", "device": "src", "busy": false, "len": 65536, "offset": 65536, "paused": false, "speed": 0, "ready": true, "type": "mirror"}]}
> +{"return": {}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "src", "len": 65536, "offset": 65536, "speed": 0, "type": "mirror"}}
> Warning: Image size mismatch!
> Images are identical.
>
> @@ -117,12 +142,17 @@ Specify the 'raw' format explicitly to remove the restrictions.
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_ERROR", "data": {"device": "src", "operation": "write", "action": "report"}}
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "src", "len": LEN, "offset": 0, "speed": 0, "type": "mirror", "error": "Operation not permitted"}}
> {"return": []}
> +{"return": {}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}
> read 65536/65536 bytes at offset 0
> 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> {"return": {}}
> {"return": {}}
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "src", "len": 2560, "offset": 2560, "speed": 0, "type": "mirror"}}
> {"return": [{"io-status": "ok", "device": "src", "busy": false, "len": 2560, "offset": 2560, "paused": false, "speed": 0, "ready": true, "type": "mirror"}]}
> +{"return": {}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "src", "len": 2560, "offset": 2560, "speed": 0, "type": "mirror"}}
> Warning: Image size mismatch!
> Images are identical.
>
> @@ -137,12 +167,17 @@ Specify the 'raw' format explicitly to remove the restrictions.
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_ERROR", "data": {"device": "src", "operation": "write", "action": "report"}}
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "src", "len": LEN, "offset": OFFSET, "speed": 0, "type": "mirror", "error": "Operation not permitted"}}
> {"return": []}
> +{"return": {}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}
> read 65536/65536 bytes at offset 0
> 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> {"return": {}}
> {"return": {}}
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "src", "len": 2560, "offset": 2560, "speed": 0, "type": "mirror"}}
> {"return": [{"io-status": "ok", "device": "src", "busy": false, "len": 2560, "offset": 2560, "paused": false, "speed": 0, "ready": true, "type": "mirror"}]}
> +{"return": {}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "src", "len": 2560, "offset": 2560, "speed": 0, "type": "mirror"}}
> Warning: Image size mismatch!
> Images are identical.
>
> @@ -157,12 +192,17 @@ Specify the 'raw' format explicitly to remove the restrictions.
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_ERROR", "data": {"device": "src", "operation": "write", "action": "report"}}
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "src", "len": LEN, "offset": OFFSET, "speed": 0, "type": "mirror", "error": "Operation not permitted"}}
> {"return": []}
> +{"return": {}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}
> read 65536/65536 bytes at offset 0
> 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> {"return": {}}
> {"return": {}}
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "src", "len": 31457280, "offset": 31457280, "speed": 0, "type": "mirror"}}
> {"return": [{"io-status": "ok", "device": "src", "busy": false, "len": 31457280, "offset": 31457280, "paused": false, "speed": 0, "ready": true, "type": "mirror"}]}
> +{"return": {}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "src", "len": 31457280, "offset": 31457280, "speed": 0, "type": "mirror"}}
> Warning: Image size mismatch!
> Images are identical.
>
> @@ -177,12 +217,17 @@ Specify the 'raw' format explicitly to remove the restrictions.
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_ERROR", "data": {"device": "src", "operation": "write", "action": "report"}}
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "src", "len": LEN, "offset": OFFSET, "speed": 0, "type": "mirror", "error": "Operation not permitted"}}
> {"return": []}
> +{"return": {}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}
> read 65536/65536 bytes at offset 0
> 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> {"return": {}}
> {"return": {}}
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "src", "len": 327680, "offset": 327680, "speed": 0, "type": "mirror"}}
> {"return": [{"io-status": "ok", "device": "src", "busy": false, "len": 327680, "offset": 327680, "paused": false, "speed": 0, "ready": true, "type": "mirror"}]}
> +{"return": {}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "src", "len": 327680, "offset": 327680, "speed": 0, "type": "mirror"}}
> Warning: Image size mismatch!
> Images are identical.
>
> @@ -197,12 +242,17 @@ Specify the 'raw' format explicitly to remove the restrictions.
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_ERROR", "data": {"device": "src", "operation": "write", "action": "report"}}
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "src", "len": LEN, "offset": OFFSET, "speed": 0, "type": "mirror", "error": "Operation not permitted"}}
> {"return": []}
> +{"return": {}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}
> read 65536/65536 bytes at offset 0
> 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> {"return": {}}
> {"return": {}}
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "src", "len": 2048, "offset": 2048, "speed": 0, "type": "mirror"}}
> {"return": [{"io-status": "ok", "device": "src", "busy": false, "len": 2048, "offset": 2048, "paused": false, "speed": 0, "ready": true, "type": "mirror"}]}
> +{"return": {}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "src", "len": 2048, "offset": 2048, "speed": 0, "type": "mirror"}}
> Warning: Image size mismatch!
> Images are identical.
>
> @@ -216,12 +266,18 @@ Specify the 'raw' format explicitly to remove the restrictions.
> {"return": {}}
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "src", "len": 512, "offset": 512, "speed": 0, "type": "mirror"}}
> {"return": [{"io-status": "ok", "device": "src", "busy": false, "len": 512, "offset": 512, "paused": false, "speed": 0, "ready": true, "type": "mirror"}]}
> +{"return": {}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "src", "len": 512, "offset": 512, "speed": 0, "type": "mirror"}}
> Warning: Image size mismatch!
> Images are identical.
> {"return": {}}
> {"return": {}}
> {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "src", "len": 512, "offset": 512, "speed": 0, "type": "mirror"}}
> {"return": [{"io-status": "ok", "device": "src", "busy": false, "len": 512, "offset": 512, "paused": false, "speed": 0, "ready": true, "type": "mirror"}]}
> +{"return": {}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}
> +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "src", "len": 512, "offset": 512, "speed": 0, "type": "mirror"}}
> Warning: Image size mismatch!
> Images are identical.
> *** done
> --
> 2.9.4
>
>
next prev parent reply other threads:[~2017-08-01 21:54 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-01 21:31 [Qemu-devel] [PATCH 0/1] qemu-iotests/109: Fix lock race condition Cleber Rosa
2017-08-01 21:31 ` [Qemu-devel] [PATCH 1/1] " Cleber Rosa
2017-08-01 21:53 ` [Qemu-devel] [PATCH for-2.10 " Eric Blake
2017-08-01 21:54 ` Jeff Cody [this message]
2017-08-01 22:16 ` [Qemu-devel] [PATCH " John Snow
2017-08-02 10:27 ` Kevin Wolf
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