/*
* Reports an error through the logging subsystem
*/
static
void virRaiseErrorLog(const char *filename,
const char *funcname,
size_t linenr,
virErrorPtr err,
virLogMetadata *meta)
{
int priority;
/*
* Hook up the error or warning to the logging facility
*/
priority = virErrorLevelPriority(err->level);
if (virErrorLogPriorityFilter)
priority = virErrorLogPriorityFilter(err, priority);
/* We don't want to pollute stderr if no logging outputs
* are explicitly requested by the user, since the default
* error function already pollutes stderr and most apps
* hate & thus disable that too. If the daemon has set
* a priority filter though, we should always forward
* all errors to the logging code.
*/
if (virLogGetNbOutputs() > 0 ||
virErrorLogPriorityFilter)
virLogMessage(&virLogSelf,
priority,
filename, linenr, funcname,
meta, "%s", err->message);
}
/* Returns the number of outputs stored in @outputs */
static int
adminConnectGetLoggingOutputs(char **outputs, unsigned int flags)
{
char *tmp = NULL;
virCheckFlags(0, -1);
if (!(tmp = virLogGetOutputs()))
return -1;
*outputs = tmp;
return virLogGetNbOutputs();
}
static virCommandPtr
virLXCProcessBuildControllerCmd(virLXCDriverPtr driver,
virDomainObjPtr vm,
int nveths,
char **veths,
int *ttyFDs,
size_t nttyFDs,
int *files,
size_t nfiles,
int handshakefd)
{
size_t i;
char *filterstr;
char *outputstr;
virCommandPtr cmd;
virLXCDriverConfigPtr cfg = virLXCDriverGetConfig(driver);
cmd = virCommandNew(vm->def->emulator);
/* The controller may call ip command, so we have to retain PATH. */
virCommandAddEnvPassBlockSUID(cmd, "PATH", "/bin:/usr/bin");
virCommandAddEnvFormat(cmd, "LIBVIRT_DEBUG=%d",
virLogGetDefaultPriority());
if (virLogGetNbFilters() > 0) {
filterstr = virLogGetFilters();
if (!filterstr) {
virReportOOMError();
goto cleanup;
}
virCommandAddEnvPair(cmd, "LIBVIRT_LOG_FILTERS", filterstr);
VIR_FREE(filterstr);
}
if (cfg->log_libvirtd) {
if (virLogGetNbOutputs() > 0) {
outputstr = virLogGetOutputs();
if (!outputstr) {
virReportOOMError();
goto cleanup;
}
virCommandAddEnvPair(cmd, "LIBVIRT_LOG_OUTPUTS", outputstr);
VIR_FREE(outputstr);
}
} else {
virCommandAddEnvFormat(cmd,
"LIBVIRT_LOG_OUTPUTS=%d:stderr",
virLogGetDefaultPriority());
}
virCommandAddArgList(cmd, "--name", vm->def->name, NULL);
for (i = 0; i < nttyFDs; i++) {
virCommandAddArg(cmd, "--console");
virCommandAddArgFormat(cmd, "%d", ttyFDs[i]);
virCommandPassFD(cmd, ttyFDs[i], 0);
}
for (i = 0; i < nfiles; i++) {
virCommandAddArg(cmd, "--passfd");
virCommandAddArgFormat(cmd, "%d", files[i]);
virCommandPassFD(cmd, files[i], 0);
}
virCommandAddArgPair(cmd, "--security",
virSecurityManagerGetModel(driver->securityManager));
virCommandAddArg(cmd, "--handshake");
virCommandAddArgFormat(cmd, "%d", handshakefd);
virCommandAddArg(cmd, "--background");
for (i = 0; i < nveths; i++) {
virCommandAddArgList(cmd, "--veth", veths[i], NULL);
}
virCommandPassFD(cmd, handshakefd, 0);
return cmd;
cleanup:
virCommandFree(cmd);
virObjectUnref(cfg);
return NULL;
}
/*
* Set up the logging environment
* By default if daemonized all errors go to the logfile libvirtd.log,
* but if verbose or error debugging is asked for then also output
* informational and debug messages. Default size if 64 kB.
*/
static int
daemonSetupLogging(struct daemonConfig *config,
bool privileged,
bool verbose,
bool godaemon)
{
virLogReset();
/*
* Libvirtd's order of precedence is:
* cmdline > environment > config
*
* In order to achieve this, we must process configuration in
* different order for the log level versus the filters and
* outputs. Because filters and outputs append, we have to look at
* the environment first and then only check the config file if
* there was no result from the environment. The default output is
* then applied only if there was no setting from either of the
* first two. Because we don't have a way to determine if the log
* level has been set, we must process variables in the opposite
* order, each one overriding the previous.
*/
if (config->log_level != 0)
virLogSetDefaultPriority(config->log_level);
virLogSetFromEnv();
if (virLogGetNbFilters() == 0)
virLogParseFilters(config->log_filters);
if (virLogGetNbOutputs() == 0)
virLogParseOutputs(config->log_outputs);
/*
* If no defined outputs, and either running
* as daemon or not on a tty, then first try
* to direct it to the systemd journal
* (if it exists)....
*/
if (virLogGetNbOutputs() == 0 &&
(godaemon || !isatty(STDIN_FILENO))) {
char *tmp;
if (access("/run/systemd/journal/socket", W_OK) >= 0) {
if (virAsprintf(&tmp, "%d:journald", virLogGetDefaultPriority()) < 0)
goto error;
virLogParseOutputs(tmp);
VIR_FREE(tmp);
}
}
/*
* otherwise direct to libvirtd.log when running
* as daemon. Otherwise the default output is stderr.
*/
if (virLogGetNbOutputs() == 0) {
char *tmp = NULL;
if (godaemon) {
if (privileged) {
if (virAsprintf(&tmp, "%d:file:%s/log/libvirt/libvirtd.log",
virLogGetDefaultPriority(),
LOCALSTATEDIR) == -1)
goto error;
} else {
char *logdir = virGetUserCacheDirectory();
mode_t old_umask;
if (!logdir)
goto error;
old_umask = umask(077);
if (virFileMakePath(logdir) < 0) {
umask(old_umask);
goto error;
}
umask(old_umask);
if (virAsprintf(&tmp, "%d:file:%s/libvirtd.log",
virLogGetDefaultPriority(), logdir) == -1) {
VIR_FREE(logdir);
goto error;
}
VIR_FREE(logdir);
}
} else {
if (virAsprintf(&tmp, "%d:stderr", virLogGetDefaultPriority()) < 0)
goto error;
}
virLogParseOutputs(tmp);
VIR_FREE(tmp);
}
/*
* Command line override for --verbose
*/
if ((verbose) && (virLogGetDefaultPriority() > VIR_LOG_INFO))
virLogSetDefaultPriority(VIR_LOG_INFO);
return 0;
error:
return -1;
}
