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Drive hot-unplug: reliable parsing of HMP results

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Hot-unplugging a disk from a guest that supports hot-unplugging generates an error
in the libvirt log when running QEMU with the "-msg timestamp=on" flag.

2015-08-06 10:48:59.945+0000: 11662: error : qemuMonitorTextDriveDel:2594 :
operation failed: deleting drive-virtio-disk4 drive failed:
2015-08-06T10:48:59.945058Z Device 'drive-virtio-disk4' not found

This error is caused because the HMP results are getting prefixed with a timestamp.
Parsing the output is not reliable with STRPREFIX as the results can be prefixed with a timestamp.

Using strstr ensures that parsing the output works whether the results are prefixed or not.

Cc: Stefan Hajnoczi <stefanha@redhat.com>
Cc: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Frank Schreuder <fschreuder@transip.nl>
This commit is contained in:
Frank Schreuder 2015-08-10 17:37:30 +02:00 committed by Ján Tomko
parent d5e6d1cfc7
commit 69a3b0df2d
1 changed files with 1 additions and 1 deletions
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2
src/qemu/qemu_monitor_text.c
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@ -2586,7 +2586,7 @@ int qemuMonitorTextDriveDel(qemuMonitorPtr mon,
/* (qemu) drive_del wark
* Device 'wark' not found */
} else if (STRPREFIX(reply, "Device '") && (strstr(reply, "not found"))) {
} else if (strstr(reply, "Device '") && strstr(reply, "not found")) {
/* NB: device not found errors mean the drive was auto-deleted and we
* ignore the error */
} else if (STRNEQ(reply, "")) {