[libvirt] [PATCH v1 07/32] util: netdev: use VIR_AUTOPTR for aggregate types
Sukrit Bhatnagar
skrtbhtngr at gmail.com
Sat Jul 28 18:01:22 UTC 2018
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 at gmail.com>
---
src/util/virnetdev.c | 129 ++++++++++++++++++++++-----------------------------
1 file changed, 55 insertions(+), 74 deletions(-)
diff --git a/src/util/virnetdev.c b/src/util/virnetdev.c
index 7653f8b..c5871b4 100644
--- a/src/util/virnetdev.c
+++ b/src/util/virnetdev.c
@@ -1855,16 +1855,15 @@ virNetDevSaveNetConfig(const char *linkdev, int vf,
const char *stateDir,
bool saveVlan)
{
- int ret = -1;
const char *pfDevName = NULL;
VIR_AUTOFREE(char *) pfDevOrig = NULL;
VIR_AUTOFREE(char *) vfDevOrig = NULL;
VIR_AUTOFREE(char *) filePath = NULL;
VIR_AUTOFREE(char *) fileStr = NULL;
+ VIR_AUTOPTR(virJSONValue) configJSON = NULL;
virMacAddr oldMAC;
char MACStr[VIR_MAC_STRING_BUFLEN];
int oldVlanTag = -1;
- virJSONValuePtr configJSON = NULL;
if (vf >= 0) {
/* linkdev is the PF */
@@ -1872,7 +1871,7 @@ virNetDevSaveNetConfig(const char *linkdev, int vf,
/* linkdev should get the VF's netdev name (or NULL if none) */
if (virNetDevPFGetVF(pfDevName, vf, &vfDevOrig) < 0)
- goto cleanup;
+ return -1;
linkdev = vfDevOrig;
saveVlan = true;
@@ -1884,12 +1883,12 @@ virNetDevSaveNetConfig(const char *linkdev, int vf,
*/
if (virNetDevGetPhysicalFunction(linkdev, &pfDevOrig) < 0)
- goto cleanup;
+ return -1;
pfDevName = pfDevOrig;
if (virNetDevGetVirtualFunctionIndex(pfDevName, linkdev, &vf) < 0)
- goto cleanup;
+ return -1;
}
if (pfDevName) {
@@ -1907,7 +1906,7 @@ virNetDevSaveNetConfig(const char *linkdev, int vf,
* explicitly enable the PF in the host system network config.
*/
if (virNetDevGetOnline(pfDevName, &pfIsOnline) < 0)
- goto cleanup;
+ return -1;
if (!pfIsOnline) {
virReportError(VIR_ERR_INTERNAL_ERROR,
@@ -1916,12 +1915,12 @@ virNetDevSaveNetConfig(const char *linkdev, int vf,
"change host network config to put the "
"PF online."),
vf, pfDevName);
- goto cleanup;
+ return -1;
}
}
if (!(configJSON = virJSONValueNewObject()))
- goto cleanup;
+ return -1;
/* if there is a PF, it's now in pfDevName, and linkdev is either
* the VF's name, or NULL (if the VF isn't bound to a net driver
@@ -1930,11 +1929,11 @@ virNetDevSaveNetConfig(const char *linkdev, int vf,
if (pfDevName && saveVlan) {
if (virAsprintf(&filePath, "%s/%s_vf%d", stateDir, pfDevName, vf) < 0)
- goto cleanup;
+ return -1;
/* get admin MAC and vlan tag */
if (virNetDevGetVfConfig(pfDevName, vf, &oldMAC, &oldVlanTag) < 0)
- goto cleanup;
+ return -1;
if (virJSONValueObjectAppendString(configJSON,
VIR_NETDEV_KEYNAME_ADMIN_MAC,
@@ -1942,39 +1941,36 @@ virNetDevSaveNetConfig(const char *linkdev, int vf,
virJSONValueObjectAppendNumberInt(configJSON,
VIR_NETDEV_KEYNAME_VLAN_TAG,
oldVlanTag) < 0) {
- goto cleanup;
+ return -1;
}
} else {
if (virAsprintf(&filePath, "%s/%s", stateDir, linkdev) < 0)
- goto cleanup;
+ return -1;
}
if (linkdev) {
if (virNetDevGetMAC(linkdev, &oldMAC) < 0)
- goto cleanup;
+ return -1;
/* for interfaces with no pfDevName (i.e. not a VF, this will
* be the only value in the file.
*/
if (virJSONValueObjectAppendString(configJSON, VIR_NETDEV_KEYNAME_MAC,
virMacAddrFormat(&oldMAC, MACStr)) < 0)
- goto cleanup;
+ return -1;
}
if (!(fileStr = virJSONValueToString(configJSON, true)))
- goto cleanup;
+ return -1;
if (virFileWriteStr(filePath, fileStr, O_CREAT|O_TRUNC|O_WRONLY) < 0) {
virReportSystemError(errno, _("Unable to preserve mac/vlan tag "
"for device = %s, vf = %d"), linkdev, vf);
- goto cleanup;
+ return -1;
}
- ret = 0;
- cleanup:
- virJSONValueFree(configJSON);
- return ret;
+ return 0;
}
@@ -2012,7 +2008,10 @@ virNetDevReadNetConfig(const char *linkdev, int vf,
VIR_AUTOFREE(char *) vfDevOrig = NULL;
VIR_AUTOFREE(char *) filePath = NULL;
VIR_AUTOFREE(char *) fileStr = NULL;
- virJSONValuePtr configJSON = NULL;
+ VIR_AUTOPTR(virJSONValue) configJSON = NULL;
+ VIR_AUTOPTR(virMacAddr) tempAdminMAC = NULL;
+ VIR_AUTOPTR(virMacAddr) tempMAC = NULL;
+ VIR_AUTOPTR(virNetDevVlan) tempVlan = NULL;
const char *MACStr = NULL;
const char *adminMACStr = NULL;
int vlanTag = -1;
@@ -2176,15 +2175,12 @@ virNetDevReadNetConfig(const char *linkdev, int vf,
/* we won't need the file again */
ignore_value(unlink(filePath));
- ret = 0;
+ return 0;
cleanup:
- if (ret < 0) {
- VIR_FREE(*adminMAC);
- VIR_FREE(*MAC);
- VIR_FREE(*vlan);
- }
+ VIR_STEAL_PTR(tempAdminMAC, *adminMAC);
+ VIR_STEAL_PTR(tempMAC, *MAC);
+ VIR_STEAL_PTR(tempVlan, *vlan);
- virJSONValueFree(configJSON);
return ret;
}
@@ -2214,13 +2210,12 @@ virNetDevSetNetConfig(const char *linkdev, int vf,
const virMacAddr *MAC,
bool setVlan)
{
- int ret = -1;
char MACStr[VIR_MAC_STRING_BUFLEN];
const char *pfDevName = NULL;
VIR_AUTOFREE(char *) pfDevOrig = NULL;
VIR_AUTOFREE(char *) vfDevOrig = NULL;
+ VIR_AUTOPTR(virPCIDevice) vfPCIDevice = NULL;
int vlanTag = -1;
- virPCIDevicePtr vfPCIDevice = NULL;
if (vf >= 0) {
/* linkdev is the PF */
@@ -2228,7 +2223,7 @@ virNetDevSetNetConfig(const char *linkdev, int vf,
/* linkdev should get the VF's netdev name (or NULL if none) */
if (virNetDevPFGetVF(pfDevName, vf, &vfDevOrig) < 0)
- goto cleanup;
+ return -1;
linkdev = vfDevOrig;
@@ -2239,12 +2234,12 @@ virNetDevSetNetConfig(const char *linkdev, int vf,
*/
if (virNetDevGetPhysicalFunction(linkdev, &pfDevOrig) < 0)
- goto cleanup;
+ return -1;
pfDevName = pfDevOrig;
if (virNetDevGetVirtualFunctionIndex(pfDevName, linkdev, &vf) < 0)
- goto cleanup;
+ return -1;
}
@@ -2256,14 +2251,14 @@ virNetDevSetNetConfig(const char *linkdev, int vf,
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("admin MAC can only be set for SR-IOV VFs, but "
"%s is not a VF"), linkdev);
- goto cleanup;
+ return -1;
}
if (vlan) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("vlan can only be set for SR-IOV VFs, but "
"%s is not a VF"), linkdev);
- goto cleanup;
+ return -1;
}
} else {
@@ -2272,14 +2267,14 @@ virNetDevSetNetConfig(const char *linkdev, int vf,
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("vlan trunking is not supported "
"by SR-IOV network devices"));
- goto cleanup;
+ return -1;
}
if (!setVlan) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("vlan tag set for interface %s but "
"caller requested it not be set"));
- goto cleanup;
+ return -1;
}
vlanTag = vlan->tag[0];
@@ -2297,7 +2292,7 @@ virNetDevSetNetConfig(const char *linkdev, int vf,
_("VF %d of PF '%s' is not bound to a net driver, "
"so its MAC address cannot be set to %s"),
vf, pfDevName, virMacAddrFormat(MAC, MACStr));
- goto cleanup;
+ return -1;
}
setMACrc = virNetDevSetMACInternal(linkdev, MAC, !!pfDevOrig);
@@ -2308,7 +2303,7 @@ virNetDevSetNetConfig(const char *linkdev, int vf,
/* if pfDevOrig == NULL, this isn't a VF, so we've failed */
if (!pfDevOrig ||
(errno != EADDRNOTAVAIL && errno != EPERM))
- goto cleanup;
+ return -1;
/* Otherwise this is a VF, and virNetDevSetMAC failed with
* EADDRNOTAVAIL/EPERM, which could be due to the
@@ -2322,18 +2317,18 @@ virNetDevSetNetConfig(const char *linkdev, int vf,
if (virNetDevSetVfConfig(pfDevName, vf,
MAC, vlanTag, &allowRetry) < 0) {
- goto cleanup;
+ return -1;
}
/* admin MAC is set, now we need to construct a virPCIDevice
* object so we can call virPCIDeviceRebind()
*/
if (!(vfPCIDevice = virNetDevGetPCIDevice(linkdev)))
- goto cleanup;
+ return -1;
/* Rebind the device. This should set the proper MAC address */
if (virPCIDeviceRebind(vfPCIDevice) < 0)
- goto cleanup;
+ return -1;
/* Wait until virNetDevGetIndex for the VF netdev returns success.
* This indicates that the device is ready to be used. If we don't
@@ -2385,20 +2380,17 @@ virNetDevSetNetConfig(const char *linkdev, int vf,
* with the "locally administered" bit set.
*/
if (!allowRetry)
- goto cleanup;
+ return -1;
allowRetry = false;
if (virNetDevSetVfConfig(pfDevName, vf,
&altZeroMAC, vlanTag, &allowRetry) < 0) {
- goto cleanup;
+ return -1;
}
}
}
- ret = 0;
- cleanup:
- virPCIDeviceFree(vfPCIDevice);
- return ret;
+ return 0;
}
@@ -2873,30 +2865,31 @@ virNetDevRxFilterFree(virNetDevRxFilterPtr filter)
int virNetDevGetRxFilter(const char *ifname,
virNetDevRxFilterPtr *filter)
{
- int ret = -1;
bool receive = false;
- virNetDevRxFilterPtr fil = virNetDevRxFilterNew();
+ VIR_AUTOPTR(virNetDevRxFilter) fil = virNetDevRxFilterNew();
+
+ *filter = NULL;
if (!fil)
- goto cleanup;
+ return -1;
if (virNetDevGetMAC(ifname, &fil->mac))
- goto cleanup;
+ return -1;
if (virNetDevGetMulticastTable(ifname, fil))
- goto cleanup;
+ return -1;
if (virNetDevGetPromiscuous(ifname, &fil->promiscuous))
- goto cleanup;
+ return -1;
if (virNetDevGetRcvAllMulti(ifname, &receive))
- goto cleanup;
+ return -1;
if (receive) {
fil->multicast.mode = VIR_NETDEV_RX_FILTER_MODE_ALL;
} else {
if (virNetDevGetRcvMulti(ifname, &receive))
- goto cleanup;
+ return -1;
if (receive)
fil->multicast.mode = VIR_NETDEV_RX_FILTER_MODE_NORMAL;
@@ -2904,15 +2897,8 @@ int virNetDevGetRxFilter(const char *ifname,
fil->multicast.mode = VIR_NETDEV_RX_FILTER_MODE_NONE;
}
- ret = 0;
- cleanup:
- if (ret < 0) {
- virNetDevRxFilterFree(fil);
- fil = NULL;
- }
-
- *filter = fil;
- return ret;
+ VIR_STEAL_PTR(*filter, fil);
+ return 0;
}
#if defined(SIOCETHTOOL) && defined(HAVE_STRUCT_IFREQ)
@@ -3185,12 +3171,12 @@ virNetDevSwitchdevFeature(const char *ifname,
{
struct nl_msg *nl_msg = NULL;
VIR_AUTOFREE(struct nlmsghdr *) resp = NULL;
+ VIR_AUTOFREE(char *) pfname = NULL;
+ VIR_AUTOPTR(virPCIDevice) pci_device_ptr = NULL;
unsigned int recvbuflen;
struct nlattr *tb[DEVLINK_ATTR_MAX + 1] = {NULL, };
- virPCIDevicePtr pci_device_ptr = NULL;
struct genlmsghdr* gmsgh = NULL;
const char *pci_name;
- VIR_AUTOFREE(char *) pfname = NULL;
int is_vf = -1;
int ret = -1;
uint32_t family_id;
@@ -3251,7 +3237,6 @@ virNetDevSwitchdevFeature(const char *ifname,
cleanup:
nlmsg_free(nl_msg);
- virPCIDeviceFree(pci_device_ptr);
return ret;
}
# else
@@ -3507,8 +3492,7 @@ int virNetDevSetCoalesce(const char *ifname,
int
virNetDevRunEthernetScript(const char *ifname, const char *script)
{
- virCommandPtr cmd;
- int ret;
+ VIR_AUTOPTR(virCommand) cmd = NULL;
/* Not a bug! Previously we did accept script="" as a NO-OP. */
if (STREQ(script, ""))
@@ -3522,8 +3506,5 @@ virNetDevRunEthernetScript(const char *ifname, const char *script)
#endif
virCommandAddEnvPassCommon(cmd);
- ret = virCommandRun(cmd, NULL);
-
- virCommandFree(cmd);
- return ret;
+ return virCommandRun(cmd, NULL);
}
--
1.8.3.1
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