[libvirt PATCH 1/5] openvz: switch from virRun to virCommand
Ján Tomko
jtomko at redhat.com
Wed Apr 22 16:52:16 UTC 2020
Construct the command in multiple steps instead of using a sentinel
in the args array.
Signed-off-by: Ján Tomko <jtomko at redhat.com>
---
src/openvz/openvz_driver.c | 96 +++++++++++++++++---------------------
1 file changed, 42 insertions(+), 54 deletions(-)
diff --git a/src/openvz/openvz_driver.c b/src/openvz/openvz_driver.c
index 1a189dbbe7..0a08c63b1b 100644
--- a/src/openvz/openvz_driver.c
+++ b/src/openvz/openvz_driver.c
@@ -481,30 +481,11 @@ static char *openvzDomainGetXMLDesc(virDomainPtr dom, unsigned int flags) {
}
-/*
- * Convenient helper to target a command line argv
- * and fill in an empty slot with the supplied
- * key value. This lets us declare the argv on the
- * stack and just splice in the domain name after
- */
-#define PROGRAM_SENTINEL ((char *)0x1)
-static void openvzSetProgramSentinal(const char **prog, const char *key)
-{
- const char **tmp = prog;
- while (tmp && *tmp) {
- if (*tmp == PROGRAM_SENTINEL) {
- *tmp = key;
- break;
- }
- tmp++;
- }
-}
-
static int openvzDomainSuspend(virDomainPtr dom)
{
+ g_autoptr(virCommand) cmd = virCommandNewArgList(VZCTL, "--quiet", "chkpnt", NULL);
struct openvz_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
- const char *prog[] = {VZCTL, "--quiet", "chkpnt", PROGRAM_SENTINEL, "--suspend", NULL};
int ret = -1;
if (!(vm = openvzDomObjFromDomain(driver, dom->uuid)))
@@ -514,8 +495,8 @@ static int openvzDomainSuspend(virDomainPtr dom)
goto cleanup;
if (virDomainObjGetState(vm, NULL) != VIR_DOMAIN_PAUSED) {
- openvzSetProgramSentinal(prog, vm->def->name);
- if (virRun(prog, NULL) < 0)
+ virCommandAddArgList(cmd, vm->def->name, "--suspend", NULL);
+ if (virCommandRun(cmd, NULL) < 0)
goto cleanup;
virDomainObjSetState(vm, VIR_DOMAIN_PAUSED, VIR_DOMAIN_PAUSED_USER);
}
@@ -529,9 +510,9 @@ static int openvzDomainSuspend(virDomainPtr dom)
static int openvzDomainResume(virDomainPtr dom)
{
+ g_autoptr(virCommand) cmd = virCommandNewArgList(VZCTL, "--quiet", "chkpnt", NULL);
struct openvz_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
- const char *prog[] = {VZCTL, "--quiet", "chkpnt", PROGRAM_SENTINEL, "--resume", NULL};
int ret = -1;
if (!(vm = openvzDomObjFromDomain(driver, dom->uuid)))
@@ -541,8 +522,8 @@ static int openvzDomainResume(virDomainPtr dom)
goto cleanup;
if (virDomainObjGetState(vm, NULL) == VIR_DOMAIN_PAUSED) {
- openvzSetProgramSentinal(prog, vm->def->name);
- if (virRun(prog, NULL) < 0)
+ virCommandAddArgList(cmd, vm->def->name, "--resume", NULL);
+ if (virCommandRun(cmd, NULL) < 0)
goto cleanup;
virDomainObjSetState(vm, VIR_DOMAIN_RUNNING, VIR_DOMAIN_RUNNING_UNPAUSED);
}
@@ -558,9 +539,9 @@ static int
openvzDomainShutdownFlags(virDomainPtr dom,
unsigned int flags)
{
+ g_autoptr(virCommand) cmd = virCommandNewArgList(VZCTL, "--quiet", "stop", NULL);
struct openvz_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
- const char *prog[] = {VZCTL, "--quiet", "stop", PROGRAM_SENTINEL, NULL};
int ret = -1;
int status;
@@ -572,14 +553,15 @@ openvzDomainShutdownFlags(virDomainPtr dom,
if (openvzGetVEStatus(vm, &status, NULL) == -1)
goto cleanup;
- openvzSetProgramSentinal(prog, vm->def->name);
if (status != VIR_DOMAIN_RUNNING) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("domain is not in running state"));
goto cleanup;
}
- if (virRun(prog, NULL) < 0)
+ virCommandAddArg(cmd, vm->def->name);
+
+ if (virCommandRun(cmd, NULL) < 0)
goto cleanup;
vm->def->id = -1;
@@ -613,9 +595,9 @@ openvzDomainDestroyFlags(virDomainPtr dom, unsigned int flags)
static int openvzDomainReboot(virDomainPtr dom,
unsigned int flags)
{
+ g_autoptr(virCommand) cmd = virCommandNewArgList(VZCTL, "--quiet", "restart", NULL);
struct openvz_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
- const char *prog[] = {VZCTL, "--quiet", "restart", PROGRAM_SENTINEL, NULL};
int ret = -1;
int status;
@@ -627,15 +609,16 @@ static int openvzDomainReboot(virDomainPtr dom,
if (openvzGetVEStatus(vm, &status, NULL) == -1)
goto cleanup;
- openvzSetProgramSentinal(prog, vm->def->name);
if (status != VIR_DOMAIN_RUNNING) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("domain is not in running state"));
goto cleanup;
}
- if (virRun(prog, NULL) < 0)
+ virCommandAddArg(cmd, vm->def->name);
+ if (virCommandRun(cmd, NULL) < 0)
goto cleanup;
+
ret = 0;
virDomainObjSetState(vm, VIR_DOMAIN_RUNNING, VIR_DOMAIN_RUNNING_BOOTED);
@@ -935,11 +918,11 @@ static virDomainPtr
openvzDomainCreateXML(virConnectPtr conn, const char *xml,
unsigned int flags)
{
+ g_autoptr(virCommand) cmd = virCommandNewArgList(VZCTL, "--quiet", "start", NULL);
struct openvz_driver *driver = conn->privateData;
virDomainDefPtr vmdef = NULL;
virDomainObjPtr vm = NULL;
virDomainPtr dom = NULL;
- const char *progstart[] = {VZCTL, "--quiet", "start", PROGRAM_SENTINEL, NULL};
unsigned int parse_flags = VIR_DOMAIN_DEF_PARSE_INACTIVE;
virCheckFlags(VIR_DOMAIN_START_VALIDATE, NULL);
@@ -986,9 +969,9 @@ openvzDomainCreateXML(virConnectPtr conn, const char *xml,
if (openvzDomainSetNetworkConfig(conn, vm->def) < 0)
goto cleanup;
- openvzSetProgramSentinal(progstart, vm->def->name);
+ virCommandAddArg(cmd, vm->def->name);
- if (virRun(progstart, NULL) < 0)
+ if (virCommandRun(cmd, NULL) < 0)
goto cleanup;
vm->pid = strtoI(vm->def->name);
@@ -1016,9 +999,9 @@ openvzDomainCreateXML(virConnectPtr conn, const char *xml,
static int
openvzDomainCreateWithFlags(virDomainPtr dom, unsigned int flags)
{
+ g_autoptr(virCommand) cmd = virCommandNewArgList(VZCTL, "--quiet", "start", NULL);
struct openvz_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
- const char *prog[] = {VZCTL, "--quiet", "start", PROGRAM_SENTINEL, NULL };
int ret = -1;
int status;
@@ -1043,8 +1026,9 @@ openvzDomainCreateWithFlags(virDomainPtr dom, unsigned int flags)
goto cleanup;
}
- openvzSetProgramSentinal(prog, vm->def->name);
- if (virRun(prog, NULL) < 0)
+ virCommandAddArg(cmd, vm->def->name);
+
+ if (virCommandRun(cmd, NULL) < 0)
goto cleanup;
vm->pid = strtoI(vm->def->name);
@@ -1068,9 +1052,9 @@ static int
openvzDomainUndefineFlags(virDomainPtr dom,
unsigned int flags)
{
+ g_autoptr(virCommand) cmd = virCommandNewArgList(VZCTL, "--quiet", "start", "destroy", NULL);
struct openvz_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
- const char *prog[] = { VZCTL, "--quiet", "destroy", PROGRAM_SENTINEL, NULL };
int ret = -1;
int status;
@@ -1083,8 +1067,9 @@ openvzDomainUndefineFlags(virDomainPtr dom,
if (openvzGetVEStatus(vm, &status, NULL) == -1)
goto cleanup;
- openvzSetProgramSentinal(prog, vm->def->name);
- if (virRun(prog, NULL) < 0)
+ virCommandAddArg(cmd, vm->def->name);
+
+ if (virCommandRun(cmd, NULL) < 0)
goto cleanup;
if (virDomainObjIsActive(vm))
@@ -1110,17 +1095,19 @@ openvzDomainSetAutostart(virDomainPtr dom, int autostart)
{
struct openvz_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
- const char *prog[] = { VZCTL, "--quiet", "set", PROGRAM_SENTINEL,
- "--onboot", autostart ? "yes" : "no",
- "--save", NULL };
+ g_autoptr(virCommand) cmd = virCommandNewArgList(VZCTL, "--quiet", NULL);
int ret = -1;
if (!(vm = openvzDomObjFromDomain(driver, dom->uuid)))
return -1;
- openvzSetProgramSentinal(prog, vm->def->name);
- if (virRun(prog, NULL) < 0)
+ virCommandAddArgList(cmd, "set", vm->def->name,
+ "--onboot", autostart ? "yes" : "no",
+ "--save", NULL);
+
+ if (virCommandRun(cmd, NULL) < 0)
goto cleanup;
+
ret = 0;
cleanup:
@@ -1191,9 +1178,8 @@ static int openvzDomainSetVcpusInternal(virDomainObjPtr vm,
unsigned int nvcpus,
virDomainXMLOptionPtr xmlopt)
{
+ g_autoptr(virCommand) cmd = virCommandNewArgList(VZCTL, "--quiet", NULL);
char str_vcpus[32];
- const char *prog[] = { VZCTL, "--quiet", "set", PROGRAM_SENTINEL,
- "--cpus", str_vcpus, "--save", NULL };
unsigned int pcpus;
pcpus = virHostCPUGetCount();
if (pcpus > 0 && pcpus < nvcpus)
@@ -1201,8 +1187,10 @@ static int openvzDomainSetVcpusInternal(virDomainObjPtr vm,
g_snprintf(str_vcpus, sizeof(str_vcpus), "%d", nvcpus);
- openvzSetProgramSentinal(prog, vm->def->name);
- if (virRun(prog, NULL) < 0)
+ virCommandAddArgList(cmd, "set", vm->def->name,
+ "--cpus", str_vcpus, "--save", NULL);
+
+ if (virCommandRun(cmd, NULL) < 0)
return -1;
if (virDomainDefSetVcpusMax(vm->def, nvcpus, xmlopt) < 0)
@@ -1544,16 +1532,16 @@ static int
openvzDomainSetMemoryInternal(virDomainObjPtr vm,
unsigned long long mem)
{
+ g_autoptr(virCommand) cmd = virCommandNewArgList(VZCTL, "--quiet", NULL);
char str_mem[16];
- const char *prog[] = { VZCTL, "--quiet", "set", PROGRAM_SENTINEL,
- "--kmemsize", str_mem, "--save", NULL
- };
/* memory has to be changed its format from kbyte to byte */
g_snprintf(str_mem, sizeof(str_mem), "%llu", mem * 1024);
- openvzSetProgramSentinal(prog, vm->def->name);
- if (virRun(prog, NULL) < 0)
+ virCommandAddArgList(cmd, "set", vm->def->name,
+ "--kmemsize", str_mem, "--save", NULL);
+
+ if (virCommandRun(cmd, NULL) < 0)
return -1;
return 0;
--
2.25.1
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