[PATCH 1/3] Migration: Introduce VIR_MIGRATE_PARAM_LISTEN_ADDRESS

[Michal Privoznik <mprivozn@xxxxxxxxxx>]

The parameter allows overriding default listen address for '-incoming'
cmd line argument on destination.

Signed-off-by: Michal Privoznik <mprivozn@xxxxxxxxxx>
---
 include/libvirt/libvirt.h.in | 10 ++++++++++
 tools/virsh-domain.c         | 11 +++++++++++
 tools/virsh.pod              | 10 ++++++++--
 3 files changed, 29 insertions(+), 2 deletions(-)

diff --git a/include/libvirt/libvirt.h.in b/include/libvirt/libvirt.h.in
index 83c219e..820e8ce 100644
--- a/include/libvirt/libvirt.h.in
+++ b/include/libvirt/libvirt.h.in
@@ -1270,6 +1270,16 @@ typedef enum {
  */
 #define VIR_MIGRATE_PARAM_GRAPHICS_URI      "graphics_uri"
 
+/**
+ * VIR_MIGRATE_PARAM_LISTEN_ADDRESS:
+ *
+ * virDomainMigrate* params field: The listen address that hypervisor on the
+ * destination side should bind to for incoming migration. Both, IPv4 and IPv6
+ * addresses are accepted as well as hostnames (the resolving is done on
+ * destination). Some hypervisors do not support this feature an will return an
+ * error if this field is used.
+ */
+#define VIR_MIGRATE_PARAM_LISTEN_ADDRESS    "listen_address"
 
 /* Domain migration. */
 virDomainPtr virDomainMigrate (virDomainPtr domain, virConnectPtr dconn,
diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c
index 42c9920..6d241db 100644
--- a/tools/virsh-domain.c
+++ b/tools/virsh-domain.c
@@ -8550,6 +8550,10 @@ static const vshCmdOptDef opts_migrate[] = {
      .type = VSH_OT_DATA,
      .help = N_("graphics URI to be used for seamless graphics migration")
     },
+    {.name = "listen-address",
+     .type = VSH_OT_DATA,
+     .help = N_("listen address that destination should bind to for incoming migration")
+    },
     {.name = "dname",
      .type = VSH_OT_DATA,
      .help = N_("rename to new name during migration (if supported)")
@@ -8606,6 +8610,13 @@ doMigrate(void *opaque)
                                 VIR_MIGRATE_PARAM_GRAPHICS_URI, opt) < 0)
         goto save_error;
 
+    if (vshCommandOptStringReq(ctl, cmd, "listen-address", &opt) < 0)
+        goto out;
+    if (opt &&
+        virTypedParamsAddString(&params, &nparams, &maxparams,
+                                VIR_MIGRATE_PARAM_LISTEN_ADDRESS, opt) < 0)
+        goto save_error;
+
     if (vshCommandOptStringReq(ctl, cmd, "dname", &opt) < 0)
         goto out;
     if (opt &&
diff --git a/tools/virsh.pod b/tools/virsh.pod
index e12a800..d555565 100644
--- a/tools/virsh.pod
+++ b/tools/virsh.pod
@@ -1081,8 +1081,8 @@ stats.
 [I<--persistent>] [I<--undefinesource>] [I<--suspend>] [I<--copy-storage-all>]
 [I<--copy-storage-inc>] [I<--change-protection>] [I<--unsafe>] [I<--verbose>]
 [I<--compressed>] [I<--abort-on-error>]
-I<domain> I<desturi> [I<migrateuri>] [I<graphicsuri>] [I<dname>]
-[I<--timeout> B<seconds>] [I<--xml> B<file>]
+I<domain> I<desturi> [I<migrateuri>] [I<graphicsuri>] [I<listen-address>]
+[I<dname>] [I<--timeout> B<seconds>] [I<--xml> B<file>]
 
 Migrate domain to another host.  Add I<--live> for live migration; <--p2p>
 for peer-2-peer migration; I<--direct> for direct migration; or I<--tunnelled>
@@ -1189,6 +1189,12 @@ specific parameters separated by '&'. Currently recognized parameters are
 
     spice://target.host.com:1234/?tlsPort=4567
 
+Optional I<listen-address> sets the listen address that hypervisor on the
+destination side should bind to for incoming migration. Both, IPv4 and IPv6
+addresses are accepted as well as hostnames (the resolving is done on
+destination). Some hypervisors do not support this feature an will return an
+error if this parameter is used.
+
 =item B<migrate-setmaxdowntime> I<domain> I<downtime>
 
 Set maximum tolerable downtime for a domain which is being live-migrated to
-- 
1.8.1.5

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