Re: [libvirt] [PATCH v2 2/4] migration: add migration_host support for Ipv6 address without brackets
On Fri, 2014-10-03 at 15:58 +0200, Ján Tomko wrote:
On 09/23/2014 06:04 AM, Chen Fan wrote:
> if specifying migration_host to an Ipv6 address without brackets,
> it was resolved to an incorrect address, such as:
> tcp:2001:0DB8::1428:4444,
> but the correct address should be:
> tcp:[2001:0DB8::1428]:4444
> so we should add brackets when parsing it.
>
> Signed-off-by: Chen Fan <chen.fan.fnst(a)cn.fujitsu.com>
> ---
> src/qemu/qemu_migration.c | 24 +++++++++++++-----------
> 1 file changed, 13 insertions(+), 11 deletions(-)
>
> diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
> index 155f5b9..016d131 100644
> --- a/src/qemu/qemu_migration.c
> +++ b/src/qemu/qemu_migration.c
> @@ -2544,7 +2544,7 @@ qemuMigrationPrepareAny(virQEMUDriverPtr driver,
> if (VIR_STRDUP(migrateFrom, "stdio") < 0)
> goto cleanup;
> } else {
> - virSocketAddr listenAddressSocket;
> + int listenAddressFamily;
> bool encloseAddress = false;
> bool hostIPv6Capable = false;
> bool qemuIPv6Capable = false;
> @@ -2565,13 +2565,9 @@ qemuMigrationPrepareAny(virQEMUDriverPtr driver,
> virObjectUnref(qemuCaps);
>
> if (listenAddress) {
> - if (virSocketAddrIsNumeric(listenAddress, NULL)) {
> + if (virSocketAddrIsNumeric(listenAddress, &listenAddressFamily)) {
Both uses of this function are in this patch (I didn't realize that when
reviewing v1).
We can rename it to virSocketAddrNumericFamily and do
if (virSocketAddrNumericFamily(listenAddress) == AF_INET6), removing the need
for a temporary variable.
Right, Agreed.
> /* listenAddress is numeric IPv4 or IPv6 */
> - if (virSocketAddrParse(&listenAddressSocket, listenAddress,
AF_UNSPEC) < 0)
> - goto cleanup;
> -
> - /* address parsed successfully */
> - if (VIR_SOCKET_ADDR_IS_FAMILY(&listenAddressSocket, AF_INET6))
{
> + if (listenAddressFamily == AF_INET6) {
> if (!qemuIPv6Capable) {
> virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED,
"%s",
> _("qemu isn't capable of
IPv6"));
> @@ -2850,11 +2846,17 @@ qemuMigrationPrepareDirect(virQEMUDriverPtr driver,
> goto cleanup;
>
> if (migrateHost != NULL) {
> - if (virSocketAddrIsNumeric(migrateHost, NULL) &&
> - virSocketAddrParse(NULL, migrateHost, AF_UNSPEC) < 0)
> - goto cleanup;
> + int family;
> + bool migrateHostisIpv6Address = false;
> +
> + if (virSocketAddrIsNumeric(migrateHost, &family) &&
> + (family == AF_INET6))
> + migrateHostisIpv6Address = true;
>
> - if (VIR_STRDUP(hostname, migrateHost) < 0)
> + if ((migrateHostisIpv6Address &&
> + virAsprintf(&hostname, "[%s]", migrateHost) < 0)
||
> + (!migrateHostisIpv6Address &&
> + virAsprintf(&hostname, "%s", migrateHost) < 0))
> goto cleanup;
In qemuMigrationPrepareAny, we have:
if (encloseAddress)
incFormat = "%s:[%s]:%d";
else
incFormat = "%s:%s:%d";
if (virAsprintf(&migrateFrom, incFormat,
protocol, listenAddress, port) < 0)
goto cleanup;
Using the same pattern here as well would make it more readable.
Thanks,
Chen
Jan
> } else {
> if ((hostname = virGetHostname()) == NULL)
>