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openvswitch: Add utility functions for getting and setting Open vSwitch per-port data

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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>
This commit is contained in:
Kyle Mestery 2012-10-01 11:18:21 -04:00 committed by Laine Stump
parent 694d0c520b
commit f6a2f97eb9
3 changed files with 77 additions and 4 deletions
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2
src/libvirt_private.syms
View File

@ -1500,7 +1500,9 @@ virNetDevMacVLanVPortProfileRegisterCallback;
# virnetdevopenvswitch.h
virNetDevOpenvswitchAddPort;
virNetDevOpenvswitchGetMigrateData;
virNetDevOpenvswitchRemovePort;
virNetDevOpenvswitchSetMigrateData;
# virnetdevtap.h

73
src/util/virnetdevopenvswitch.c
View File

@ -173,9 +173,74 @@ int virNetDevOpenvswitchRemovePort(const char *brname ATTRIBUTE_UNUSED, const ch
_("Unable to delete port %s from OVS"), ifname);
goto cleanup;
}
ret = 0;
cleanup:
virCommandFree(cmd);
return ret;
ret = 0;
cleanup:
virCommandFree(cmd);
return ret;
}
/**
* virNetDevOpenvswitchGetMigrateData:
* @migrate: a pointer to store the data into, allocated by this function
* @ifname: name of the interface for which data is being migrated
*
* Allocates data to be migrated specific to Open vSwitch
*
* Returns 0 in case of success or -1 in case of failure
*/
int virNetDevOpenvswitchGetMigrateData(char **migrate, const char *ifname)
{
virCommandPtr cmd = NULL;
int ret = -1;
cmd = virCommandNewArgList(OVSVSCTL, "--timeout=5", "get", "Interface",
ifname, "external_ids:PortData", NULL);
virCommandSetOutputBuffer(cmd, migrate);
/* Run the command */
if (virCommandRun(cmd, NULL) < 0) {
virReportSystemError(VIR_ERR_INTERNAL_ERROR,
_("Unable to run command to get OVS port data for "
"interface %s"), ifname);
goto cleanup;
}
/* Wipeout the newline */
(*migrate)[strlen(*migrate) - 1] = '\0';
ret = 0;
cleanup:
return ret;
}
/**
* virNetDevOpenvswitchSetMigrateData:
* @migrate: the data which was transferred during migration
* @ifname: the name of the interface the data is associated with
*
* Repopulates OVS per-port data on destination host
*
* Returns 0 in case of success or -1 in case of failure
*/
int virNetDevOpenvswitchSetMigrateData(char *migrate, const char *ifname)
{
virCommandPtr cmd = NULL;
int ret = -1;
cmd = virCommandNewArgList(OVSVSCTL, "--timeout=5", "set",
"Interface", ifname, NULL);
virCommandAddArgFormat(cmd, "external_ids:PortData=%s", migrate);
/* Run the command */
if (virCommandRun(cmd, NULL) < 0) {
virReportSystemError(VIR_ERR_INTERNAL_ERROR,
_("Unable to run command to set OVS port data for "
"interface %s"), ifname);
goto cleanup;
}
ret = 0;
cleanup:
return ret;
}

6
src/util/virnetdevopenvswitch.h
View File

@ -42,4 +42,10 @@ int virNetDevOpenvswitchAddPort(const char *brname,
int virNetDevOpenvswitchRemovePort(const char *brname, const char *ifname)
ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
int virNetDevOpenvswitchGetMigrateData(char **migrate, const char *ifname)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
int virNetDevOpenvswitchSetMigrateData(char *migrate, const char *ifname)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
#endif /* __VIR_NETDEV_OPENVSWITCH_H__ */