Display the executed command and failure message if a command failed to
execute.
Signed-off-by: Stefan Berger <stefanb@xxxxxxxxxxxxxxxxxx>
---
src/nwfilter/nwfilter_ebiptables_driver.c | 82 ++++++++++++++++++------------
1 file changed, 50 insertions(+), 32 deletions(-)
Index: libvirt-acl/src/nwfilter/nwfilter_ebiptables_driver.c
===================================================================
--- libvirt-acl.orig/src/nwfilter/nwfilter_ebiptables_driver.c
+++ libvirt-acl/src/nwfilter/nwfilter_ebiptables_driver.c
@@ -63,10 +63,10 @@
#define CMD_DEF_PRE "cmd='"
#define CMD_DEF_POST "'"
#define CMD_DEF(X) CMD_DEF_PRE X CMD_DEF_POST
-#define CMD_EXEC "eval res=\\$\\(\"${cmd}\"\\)" CMD_SEPARATOR
+#define CMD_EXEC "eval res=\\$\\(\"${cmd} 2>&1 \"\\)" CMD_SEPARATOR
#define CMD_STOPONERR(X) \
X ? "if [ $? -ne 0 ]; then" \
- " echo \"Failure to execute command '${cmd}'.\";" \
+ " echo \"Failure to execute command '${cmd}' : '${res}'.\";" \
" exit 1;" \
"fi" CMD_SEPARATOR \
: ""
@@ -2785,12 +2785,16 @@ err_exit:
*/
static int
ebiptablesExecCLI(virBufferPtr buf,
- int *status)
+ int *status, char **errbuf)
{
char *cmds;
char *filename;
int rc;
const char *argv[] = {NULL, NULL};
+ virCommandPtr cmd;
+
+ if (errbuf)
+ VIR_FREE(*errbuf);
if (virBufferError(buf)) {
virReportOOMError();
@@ -2817,7 +2821,13 @@ ebiptablesExecCLI(virBufferPtr buf,
virMutexLock(&execCLIMutex);
- rc = virRun(argv, status);
+ cmd = virCommandNewArgs(argv);
+ if (errbuf)
+ virCommandSetOutputBuffer(cmd, errbuf);
+
+ rc = virCommandRun(cmd, status);
+
+ virCommandFree(cmd);
virMutexUnlock(&execCLIMutex);
@@ -2831,6 +2841,8 @@ ebiptablesExecCLI(virBufferPtr buf,
}
VIR_DEBUG("rc = %d, status = %d", rc, *status);
+ if (errbuf && *errbuf)
+ VIR_DEBUG("error message: %s", *errbuf);
unlink(filename);
@@ -3285,7 +3297,7 @@ ebtablesApplyBasicRules(const char *ifna
ebtablesLinkTmpRootChain(&buf, 1, ifname, 1);
ebtablesRenameTmpRootChain(&buf, 1, ifname);
- if (ebiptablesExecCLI(&buf, &cli_status) || cli_status != 0)
+ if (ebiptablesExecCLI(&buf, &cli_status, NULL) || cli_status != 0)
goto tear_down_tmpebchains;
return 0;
@@ -3401,7 +3413,7 @@ ebtablesApplyDHCPOnlyRules(const char *i
ebtablesRenameTmpRootChain(&buf, 1, ifname);
ebtablesRenameTmpRootChain(&buf, 0, ifname);
- if (ebiptablesExecCLI(&buf, &cli_status) || cli_status != 0)
+ if (ebiptablesExecCLI(&buf, &cli_status, NULL) || cli_status != 0)
goto tear_down_tmpebchains;
VIR_FREE(srcIPParam);
@@ -3474,7 +3486,7 @@ ebtablesApplyDropAllRules(const char *if
ebtablesRenameTmpRootChain(&buf, 1, ifname);
ebtablesRenameTmpRootChain(&buf, 0, ifname);
- if (ebiptablesExecCLI(&buf, &cli_status) || cli_status != 0)
+ if (ebiptablesExecCLI(&buf, &cli_status, NULL) || cli_status != 0)
goto tear_down_tmpebchains;
return 0;
@@ -3517,7 +3529,7 @@ static int ebtablesCleanAll(const char *
ebtablesRemoveTmpRootChain(&buf, 1, ifname);
ebtablesRemoveTmpRootChain(&buf, 0, ifname);
- ebiptablesExecCLI(&buf, &cli_status);
+ ebiptablesExecCLI(&buf, &cli_status, NULL);
return 0;
}
@@ -3677,6 +3689,7 @@ ebiptablesApplyNewRules(virConnectPtr co
bool haveIp6tables = false;
ebiptablesRuleInstPtr ebtChains = NULL;
int nEbtChains = 0;
+ char *errmsg = NULL;
if (!chains_in_set || !chains_out_set) {
virReportOOMError();
@@ -3715,7 +3728,7 @@ ebiptablesApplyNewRules(virConnectPtr co
ebtablesRemoveTmpSubChains(&buf, ifname);
ebtablesRemoveTmpRootChain(&buf, 1, ifname);
ebtablesRemoveTmpRootChain(&buf, 0, ifname);
- ebiptablesExecCLI(&buf, &cli_status);
+ ebiptablesExecCLI(&buf, &cli_status, NULL);
}
/* create needed chains */
@@ -3730,7 +3743,7 @@ ebiptablesApplyNewRules(virConnectPtr co
qsort(&ebtChains[0], nEbtChains, sizeof(ebtChains[0]),
ebiptablesRuleOrderSort);
- if (ebiptablesExecCLI(&buf, &cli_status) || cli_status != 0)
+ if (ebiptablesExecCLI(&buf, &cli_status, &errmsg) || cli_status != 0)
goto tear_down_tmpebchains;
/* process ebtables commands; interleave commands from filters with
@@ -3764,7 +3777,7 @@ ebiptablesApplyNewRules(virConnectPtr co
ebtChains[j++].commandTemplate,
'A', -1, 1);
- if (ebiptablesExecCLI(&buf, &cli_status) || cli_status != 0)
+ if (ebiptablesExecCLI(&buf, &cli_status, &errmsg) || cli_status != 0)
goto tear_down_tmpebchains;
if (haveIptables) {
@@ -3773,17 +3786,17 @@ ebiptablesApplyNewRules(virConnectPtr co
iptablesCreateBaseChains(iptables_cmd_path, &buf);
- if (ebiptablesExecCLI(&buf, &cli_status) || cli_status != 0)
+ if (ebiptablesExecCLI(&buf, &cli_status, &errmsg) || cli_status != 0)
goto tear_down_tmpebchains;
iptablesCreateTmpRootChains(iptables_cmd_path, &buf, ifname);
- if (ebiptablesExecCLI(&buf, &cli_status) || cli_status != 0)
+ if (ebiptablesExecCLI(&buf, &cli_status, &errmsg) || cli_status != 0)
goto tear_down_tmpiptchains;
iptablesLinkTmpRootChains(iptables_cmd_path, &buf, ifname);
iptablesSetupVirtInPost(iptables_cmd_path, &buf, ifname);
- if (ebiptablesExecCLI(&buf, &cli_status) || cli_status != 0)
+ if (ebiptablesExecCLI(&buf, &cli_status, &errmsg) || cli_status != 0)
goto tear_down_tmpiptchains;
for (i = 0; i < nruleInstances; i++) {
@@ -3794,7 +3807,7 @@ ebiptablesApplyNewRules(virConnectPtr co
'A', -1, 1);
}
- if (ebiptablesExecCLI(&buf, &cli_status) || cli_status != 0)
+ if (ebiptablesExecCLI(&buf, &cli_status, &errmsg) || cli_status != 0)
goto tear_down_tmpiptchains;
iptablesCheckBridgeNFCallEnabled(false);
@@ -3806,17 +3819,17 @@ ebiptablesApplyNewRules(virConnectPtr co
iptablesCreateBaseChains(ip6tables_cmd_path, &buf);
- if (ebiptablesExecCLI(&buf, &cli_status) || cli_status != 0)
+ if (ebiptablesExecCLI(&buf, &cli_status, &errmsg) || cli_status != 0)
goto tear_down_tmpiptchains;
iptablesCreateTmpRootChains(ip6tables_cmd_path, &buf, ifname);
- if (ebiptablesExecCLI(&buf, &cli_status) || cli_status != 0)
+ if (ebiptablesExecCLI(&buf, &cli_status, &errmsg) || cli_status != 0)
goto tear_down_tmpip6tchains;
iptablesLinkTmpRootChains(ip6tables_cmd_path, &buf, ifname);
iptablesSetupVirtInPost(ip6tables_cmd_path, &buf, ifname);
- if (ebiptablesExecCLI(&buf, &cli_status) || cli_status != 0)
+ if (ebiptablesExecCLI(&buf, &cli_status, &errmsg) || cli_status != 0)
goto tear_down_tmpip6tchains;
for (i = 0; i < nruleInstances; i++) {
@@ -3826,7 +3839,7 @@ ebiptablesApplyNewRules(virConnectPtr co
'A', -1, 1);
}
- if (ebiptablesExecCLI(&buf, &cli_status) || cli_status != 0)
+ if (ebiptablesExecCLI(&buf, &cli_status, &errmsg) || cli_status != 0)
goto tear_down_tmpip6tchains;
iptablesCheckBridgeNFCallEnabled(true);
@@ -3837,7 +3850,7 @@ ebiptablesApplyNewRules(virConnectPtr co
if (virHashSize(chains_out_set) != 0)
ebtablesLinkTmpRootChain(&buf, 0, ifname, 1);
- if (ebiptablesExecCLI(&buf, &cli_status) || cli_status != 0)
+ if (ebiptablesExecCLI(&buf, &cli_status, &errmsg) || cli_status != 0)
goto tear_down_ebsubchains_and_unlink;
virHashFree(chains_in_set);
@@ -3847,6 +3860,8 @@ ebiptablesApplyNewRules(virConnectPtr co
VIR_FREE(ebtChains[i].commandTemplate);
VIR_FREE(ebtChains);
+ VIR_FREE(errmsg);
+
return 0;
tear_down_ebsubchains_and_unlink:
@@ -3874,12 +3889,13 @@ tear_down_tmpebchains:
ebtablesRemoveTmpRootChain(&buf, 0, ifname);
}
- ebiptablesExecCLI(&buf, &cli_status);
+ ebiptablesExecCLI(&buf, &cli_status, NULL);
virNWFilterReportError(VIR_ERR_BUILD_FIREWALL,
_("Some rules could not be created for "
- "interface %s."),
- ifname);
+ "interface %s : %s"),
+ ifname,
+ errmsg ? errmsg : "");
exit_free_sets:
virHashFree(chains_in_set);
@@ -3889,6 +3905,8 @@ exit_free_sets:
VIR_FREE(ebtChains[i].commandTemplate);
VIR_FREE(ebtChains);
+ VIR_FREE(errmsg);
+
return 1;
}
@@ -3919,7 +3937,7 @@ ebiptablesTearNewRules(virConnectPtr con
ebtablesRemoveTmpRootChain(&buf, 0, ifname);
}
- ebiptablesExecCLI(&buf, &cli_status);
+ ebiptablesExecCLI(&buf, &cli_status, NULL);
return 0;
}
@@ -3938,7 +3956,7 @@ ebiptablesTearOldRules(virConnectPtr con
iptablesRemoveRootChains(iptables_cmd_path, &buf, ifname);
iptablesRenameTmpRootChains(iptables_cmd_path, &buf, ifname);
- ebiptablesExecCLI(&buf, &cli_status);
+ ebiptablesExecCLI(&buf, &cli_status, NULL);
}
if (ip6tables_cmd_path) {
@@ -3946,7 +3964,7 @@ ebiptablesTearOldRules(virConnectPtr con
iptablesRemoveRootChains(ip6tables_cmd_path, &buf, ifname);
iptablesRenameTmpRootChains(ip6tables_cmd_path, &buf, ifname);
- ebiptablesExecCLI(&buf, &cli_status);
+ ebiptablesExecCLI(&buf, &cli_status, NULL);
}
if (ebtables_cmd_path) {
@@ -3960,7 +3978,7 @@ ebiptablesTearOldRules(virConnectPtr con
ebtablesRenameTmpSubAndRootChains(&buf, ifname);
- ebiptablesExecCLI(&buf, &cli_status);
+ ebiptablesExecCLI(&buf, &cli_status, NULL);
}
return 0;
@@ -3997,7 +4015,7 @@ ebiptablesRemoveRules(virConnectPtr conn
'D', -1,
0);
- if (ebiptablesExecCLI(&buf, &cli_status))
+ if (ebiptablesExecCLI(&buf, &cli_status, NULL))
goto err_exit;
if (cli_status) {
@@ -4048,7 +4066,7 @@ ebiptablesAllTeardown(const char *ifname
ebtablesRemoveRootChain(&buf, 1, ifname);
ebtablesRemoveRootChain(&buf, 0, ifname);
}
- ebiptablesExecCLI(&buf, &cli_status);
+ ebiptablesExecCLI(&buf, &cli_status, NULL);
return 0;
}
@@ -4103,7 +4121,7 @@ ebiptablesDriverInit(bool privileged)
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE,
CMD_STOPONERR(1));
- if (ebiptablesExecCLI(&buf, &cli_status) || cli_status)
+ if (ebiptablesExecCLI(&buf, &cli_status, NULL) || cli_status)
VIR_FREE(ebtables_cmd_path);
}
@@ -4116,7 +4134,7 @@ ebiptablesDriverInit(bool privileged)
iptables_cmd_path,
CMD_STOPONERR(1));
- if (ebiptablesExecCLI(&buf, &cli_status) || cli_status)
+ if (ebiptablesExecCLI(&buf, &cli_status, NULL) || cli_status)
VIR_FREE(iptables_cmd_path);
}
@@ -4129,7 +4147,7 @@ ebiptablesDriverInit(bool privileged)
ip6tables_cmd_path,
CMD_STOPONERR(1));
- if (ebiptablesExecCLI(&buf, &cli_status) || cli_status)
+ if (ebiptablesExecCLI(&buf, &cli_status, NULL) || cli_status)
VIR_FREE(ip6tables_cmd_path);
}
--
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