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openvswitch: Add utility functions for getting and setting Open vSwitch per-port data
Add utility functions for Open vSwitch to both save per-port data before a live migration, and restore the per-port data after a live migration. Signed-off-by: Kyle Mestery <kmestery@cisco.com>
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@ -1500,7 +1500,9 @@ virNetDevMacVLanVPortProfileRegisterCallback;
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# virnetdevopenvswitch.h
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virNetDevOpenvswitchAddPort;
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virNetDevOpenvswitchGetMigrateData;
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virNetDevOpenvswitchRemovePort;
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virNetDevOpenvswitchSetMigrateData;
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# virnetdevtap.h
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@ -173,9 +173,74 @@ int virNetDevOpenvswitchRemovePort(const char *brname ATTRIBUTE_UNUSED, const ch
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_("Unable to delete port %s from OVS"), ifname);
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goto cleanup;
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}
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ret = 0;
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cleanup:
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ret = 0;
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cleanup:
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virCommandFree(cmd);
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return ret;
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}
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/**
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* virNetDevOpenvswitchGetMigrateData:
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* @migrate: a pointer to store the data into, allocated by this function
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* @ifname: name of the interface for which data is being migrated
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*
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* Allocates data to be migrated specific to Open vSwitch
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*
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* Returns 0 in case of success or -1 in case of failure
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*/
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int virNetDevOpenvswitchGetMigrateData(char **migrate, const char *ifname)
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{
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virCommandPtr cmd = NULL;
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int ret = -1;
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cmd = virCommandNewArgList(OVSVSCTL, "--timeout=5", "get", "Interface",
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ifname, "external_ids:PortData", NULL);
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virCommandSetOutputBuffer(cmd, migrate);
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/* Run the command */
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if (virCommandRun(cmd, NULL) < 0) {
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virReportSystemError(VIR_ERR_INTERNAL_ERROR,
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_("Unable to run command to get OVS port data for "
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"interface %s"), ifname);
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goto cleanup;
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}
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/* Wipeout the newline */
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(*migrate)[strlen(*migrate) - 1] = '\0';
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ret = 0;
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cleanup:
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return ret;
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}
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/**
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* virNetDevOpenvswitchSetMigrateData:
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* @migrate: the data which was transferred during migration
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* @ifname: the name of the interface the data is associated with
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*
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* Repopulates OVS per-port data on destination host
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*
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* Returns 0 in case of success or -1 in case of failure
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*/
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int virNetDevOpenvswitchSetMigrateData(char *migrate, const char *ifname)
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{
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virCommandPtr cmd = NULL;
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int ret = -1;
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cmd = virCommandNewArgList(OVSVSCTL, "--timeout=5", "set",
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"Interface", ifname, NULL);
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virCommandAddArgFormat(cmd, "external_ids:PortData=%s", migrate);
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/* Run the command */
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if (virCommandRun(cmd, NULL) < 0) {
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virReportSystemError(VIR_ERR_INTERNAL_ERROR,
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_("Unable to run command to set OVS port data for "
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"interface %s"), ifname);
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goto cleanup;
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}
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ret = 0;
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cleanup:
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return ret;
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}
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@ -42,4 +42,10 @@ int virNetDevOpenvswitchAddPort(const char *brname,
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int virNetDevOpenvswitchRemovePort(const char *brname, const char *ifname)
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ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
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int virNetDevOpenvswitchGetMigrateData(char **migrate, const char *ifname)
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ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
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int virNetDevOpenvswitchSetMigrateData(char *migrate, const char *ifname)
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ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
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#endif /* __VIR_NETDEV_OPENVSWITCH_H__ */
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