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util: firewall: use VIR_AUTOPTR for aggregate types

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By making use of GNU C's cleanup attribute handled by the
VIR_AUTOPTR macro for declaring aggregate pointer variables,
majority of the calls to *Free functions can be dropped, which
in turn leads to getting rid of most of our cleanup sections.

Signed-off-by: Sukrit Bhatnagar <skrtbhtngr@gmail.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
This commit is contained in:
Sukrit Bhatnagar 2018-07-24 21:22:17 +05:30 committed by Erik Skultety
parent 469da57cd6
commit 5d7bf2f852
1 changed files with 13 additions and 23 deletions
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36
src/util/virfirewall.c
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@ -119,14 +119,13 @@ virFirewallCheckUpdateLock(bool *lockflag,
const char *const*args)
{
int status; /* Ignore failed commands without logging them */
virCommandPtr cmd = virCommandNewArgs(args);
VIR_AUTOPTR(virCommand) cmd = virCommandNewArgs(args);
if (virCommandRun(cmd, &status) < 0 || status) {
VIR_INFO("locking not supported by %s", args[0]);
} else {
VIR_INFO("using locking for %s", args[0]);
*lockflag = true;
}
virCommandFree(cmd);
}
static void
@ -673,16 +672,15 @@ virFirewallApplyRuleDirect(virFirewallRulePtr rule,
{
size_t i;
const char *bin = virFirewallLayerCommandTypeToString(rule->layer);
virCommandPtr cmd = NULL;
VIR_AUTOPTR(virCommand) cmd = NULL;
int status;
int ret = -1;
VIR_AUTOFREE(char *) error = NULL;
if (!bin) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unknown firewall layer %d"),
rule->layer);
goto cleanup;
return -1;
}
cmd = virCommandNewArgList(bin, NULL);
@ -694,7 +692,7 @@ virFirewallApplyRuleDirect(virFirewallRulePtr rule,
virCommandSetErrorBuffer(cmd, &error);
if (virCommandRun(cmd, &status) < 0)
goto cleanup;
return -1;
if (status != 0) {
if (ignoreErrors) {
@ -705,14 +703,11 @@ virFirewallApplyRuleDirect(virFirewallRulePtr rule,
_("Failed to apply firewall rules %s: %s"),
NULLSTR(args), NULLSTR(error));
VIR_FREE(*output);
goto cleanup;
return -1;
}
}
ret = 0;
cleanup:
virCommandFree(cmd);
return ret;
return 0;
}
@ -805,8 +800,7 @@ virFirewallApplyRule(virFirewallPtr firewall,
{
VIR_AUTOFREE(char *) output = NULL;
VIR_AUTOFREE(char *) str = virFirewallRuleToString(rule);
char **lines = NULL;
int ret = -1;
VIR_AUTOPTR(virString) lines = NULL;
VIR_INFO("Applying rule '%s'", NULLSTR(str));
if (rule->ignoreErrors)
@ -831,28 +825,25 @@ virFirewallApplyRule(virFirewallPtr firewall,
if (rule->queryCB && output) {
if (!(lines = virStringSplit(output, "\n", -1)))
goto cleanup;
return -1;
VIR_DEBUG("Invoking query %p with '%s'", rule->queryCB, output);
if (rule->queryCB(firewall, (const char *const *)lines, rule->queryOpaque) < 0)
goto cleanup;
return -1;
if (firewall->err == ENOMEM) {
virReportOOMError();
goto cleanup;
return -1;
}
if (firewall->err) {
virReportSystemError(firewall->err, "%s",
_("Unable to create rule"));
goto cleanup;
return -1;
}
}
ret = 0;
cleanup:
virStringListFree(lines);
return ret;
return 0;
}
static int
@ -926,7 +917,7 @@ virFirewallApply(virFirewallPtr firewall)
if (virFirewallApplyGroup(firewall, i) < 0) {
VIR_DEBUG("Rolling back groups up to %zu for %p", i, firewall);
size_t first = i;
virErrorPtr saved_error = virSaveLastError();
VIR_AUTOPTR(virError) saved_error = virSaveLastError();
/*
* Look at any inheritance markers to figure out
@ -947,7 +938,6 @@ virFirewallApply(virFirewallPtr firewall)
}
virSetError(saved_error);
virFreeError(saved_error);
VIR_DEBUG("Done rolling back groups for %p", firewall);
goto cleanup;
}