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fix various breakages in qemu Dump command

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1) qemuMigrateToCommand uses ">>" so we have to truncate the file
before starting the migration;

2) the command wasn't updated to chown the driver and set/restore
the security lavels;

3) the VM does not have to be resumed if migration fails;

4) the file is not removed when migration fails.

* src/qemu/qemu_driver.c (qemuDomainCoreDump): Truncate file before
  dumping, set/restore ownership and security labels for the file.
This commit is contained in:
Paolo Bonzini 2009-12-14 11:27:41 +01:00 committed by Daniel Veillard
parent a7d1eb3c44
commit f509e16241
1 changed files with 45 additions and 3 deletions
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48
src/qemu/qemu_driver.c
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@ -3801,7 +3801,7 @@ static int qemudDomainCoreDump(virDomainPtr dom,
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int resume = 0, paused = 0;
int ret = -1;
int ret = -1, fd = -1;
const char *args[] = {
"cat",
NULL,
@ -3828,6 +3828,33 @@ static int qemudDomainCoreDump(virDomainPtr dom,
goto endjob;
}
/* Create an empty file with appropriate ownership. */
if ((fd = open(path, O_CREAT|O_TRUNC|O_WRONLY, S_IRUSR|S_IWUSR)) < 0) {
qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED,
_("failed to create '%s'"), path);
goto endjob;
}
if (close(fd) < 0) {
virReportSystemError(dom->conn, errno,
_("unable to save file %s"),
path);
goto endjob;
}
if (driver->privileged &&
chown(path, driver->user, driver->group) < 0) {
virReportSystemError(NULL, errno,
_("unable to set ownership of '%s' to user %d:%d"),
path, driver->user, driver->group);
goto endjob;
}
if (driver->securityDriver &&
driver->securityDriver->domainSetSavedStateLabel &&
driver->securityDriver->domainSetSavedStateLabel(dom->conn, vm, path) == -1)
goto endjob;
/* Migrate will always stop the VM, so once we support live dumping
the resume condition will stay the same, independent of whether
the stop command is issued. */
@ -3849,8 +3876,22 @@ static int qemudDomainCoreDump(virDomainPtr dom,
qemuDomainObjEnterMonitor(vm);
ret = qemuMonitorMigrateToCommand(priv->mon, 0, args, path);
qemuDomainObjExitMonitor(vm);
paused = 1;
paused |= (ret == 0);
if (driver->privileged &&
chown(path, 0, 0) < 0) {
virReportSystemError(NULL, errno,
_("unable to set ownership of '%s' to user %d:%d"),
path, 0, 0);
goto endjob;
}
if (driver->securityDriver &&
driver->securityDriver->domainRestoreSavedStateLabel &&
driver->securityDriver->domainRestoreSavedStateLabel(dom->conn, path) == -1)
goto endjob;
endjob:
/* Since the monitor is always attached to a pty for libvirt, it
will support synchronous operations so we always get here after
the migration is complete. */
@ -3864,11 +3905,12 @@ static int qemudDomainCoreDump(virDomainPtr dom,
qemuDomainObjExitMonitor(vm);
}
endjob:
if (qemuDomainObjEndJob(vm) == 0)
vm = NULL;
cleanup:
if (ret != 0)
unlink(path);
if (vm)
virDomainObjUnlock(vm);
return ret;