[v8,7/9] migration: modify migration_channels_and_uri_compatible() for new QAPI syntax

Commit Message

Het Gala July 13, 2023, 10:57 a.m. UTC

migration_channels_and_uri_compatible() check for transport mechanism
suitable for multifd migration gets executed when the caller calls old
uri syntax. It needs it to be run when using the modern MigrateChannel
QAPI syntax too.

After URI -> 'MigrateChannel' :
migration_channels_and_uri_compatible() ->
migration_channels_and_transport_compatible() passes object as argument
and check for valid transport mechanism.

Suggested-by: Aravind Retnakaran <[e-mail]>
Signed-off-by: Het Gala <[e-mail]>
---
 migration/migration.c | 25 ++++++++++++++-----------
 1 file changed, 14 insertions(+), 11 deletions(-)

Comments

Daniel P. Berrangé July 19, 2023, 10:12 a.m. UTC | #1

On Thu, Jul 13, 2023 at 10:57:11AM +0000, Het Gala wrote:
> migration_channels_and_uri_compatible() check for transport mechanism
> suitable for multifd migration gets executed when the caller calls old
> uri syntax. It needs it to be run when using the modern MigrateChannel
> QAPI syntax too.
> 
> After URI -> 'MigrateChannel' :
> migration_channels_and_uri_compatible() ->
> migration_channels_and_transport_compatible() passes object as argument
> and check for valid transport mechanism.
> 
> Suggested-by: Aravind Retnakaran <[e-mail]>
> Signed-off-by: Het Gala <[e-mail]>
> ---
>  migration/migration.c | 25 ++++++++++++++-----------
>  1 file changed, 14 insertions(+), 11 deletions(-)

Reviewed-by: Daniel P. Berrangé <[e-mail]>

With regards,
Daniel

Patch

diff --git a/migration/migration.c b/migration/migration.c
index 65272ef739..62894952ca 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -104,17 +104,20 @@  static bool migration_needs_multiple_sockets(void)
     return migrate_multifd() || migrate_postcopy_preempt();
 }
 
-static bool uri_supports_multi_channels(const char *uri)
+static bool transport_supports_multi_channels(SocketAddress *saddr)
 {
-    return strstart(uri, "tcp:", NULL) || strstart(uri, "unix:", NULL) ||
-           strstart(uri, "vsock:", NULL);
+    return saddr->type == SOCKET_ADDRESS_TYPE_INET ||
+           saddr->type == SOCKET_ADDRESS_TYPE_UNIX ||
+           saddr->type == SOCKET_ADDRESS_TYPE_VSOCK;
 }
 
 static bool
-migration_channels_and_uri_compatible(const char *uri, Error **errp)
+migration_channels_and_transport_compatible(MigrationAddress *addr,
+                                            Error **errp)
 {
     if (migration_needs_multiple_sockets() &&
-        !uri_supports_multi_channels(uri)) {
+        (addr->transport == MIGRATION_ADDRESS_TYPE_SOCKET) &&
+        !transport_supports_multi_channels(&addr->u.socket)) {
         error_setg(errp, "Migration requires multi-channel URIs (e.g. tcp)");
         return false;
     }
@@ -481,12 +484,12 @@  static void qemu_start_incoming_migration(const char *uri, bool has_channels,
         return;
     }
 
-    /* URI is not suitable for migration? */
-    if (!migration_channels_and_uri_compatible(uri, errp)) {
+    if (uri && !migrate_uri_parse(uri, &channel, errp)) {
         return;
     }
 
-    if (uri && !migrate_uri_parse(uri, &channel, errp)) {
+    /* transport mechanism not suitable for migration? */
+    if (!migration_channels_and_transport_compatible(channel, errp)) {
         return;
     }
 
@@ -1717,12 +1720,12 @@  void qmp_migrate(const char *uri, bool has_channels,
         return;
     }
 
-    /* URI is not suitable for migration? */
-    if (!migration_channels_and_uri_compatible(uri, errp)) {
+    if (!migrate_uri_parse(uri, &channel, errp)) {
         return;
     }
 
-    if (!migrate_uri_parse(uri, &channel, errp)) {
+    /* transport mechanism not suitable for migration? */
+    if (!migration_channels_and_transport_compatible(channel, errp)) {
         return;
     }