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migration: Support fd-based socket address in cpr_transfer_input

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Extend cpr_transfer_input to handle SOCKET_ADDRESS_TYPE_FD alongside
SOCKET_ADDRESS_TYPE_UNIX. This change supports the use of pre-listened
socket file descriptors for cpr migration channels.

This change is particularly useful in qtest environments, where the
socket may be created externally and passed via fd.

Reviewed-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Steve Sistare <steven.sistare@oracle.com>
Signed-off-by: Jaehoon Kim <jhkim@linux.ibm.com>
Link: https://lore.kernel.org/r/20250611205610.147008-3-jhkim@linux.ibm.com
Signed-off-by: Peter Xu <peterx@redhat.com>
This commit is contained in:
Jaehoon Kim 2025-06-11 15:56:10 -05:00 • committed by Peter Xu
parent 0310d594d9
commit 8f87c87eca
1 changed files with 5 additions and 2 deletions
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7
migration/cpr-transfer.c
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@ -46,7 +46,8 @@ QEMUFile *cpr_transfer_input(MigrationChannel *channel, Error **errp)
MigrationAddress *addr = channel->addr;
if (addr->transport == MIGRATION_ADDRESS_TYPE_SOCKET &&
addr->u.socket.type == SOCKET_ADDRESS_TYPE_UNIX) {
(addr->u.socket.type == SOCKET_ADDRESS_TYPE_UNIX ||
addr->u.socket.type == SOCKET_ADDRESS_TYPE_FD)) {
g_autoptr(QIOChannelSocket) sioc = NULL;
SocketAddress *saddr = &addr->u.socket;
@ -60,7 +61,9 @@ QEMUFile *cpr_transfer_input(MigrationChannel *channel, Error **errp)
sioc = qio_net_listener_wait_client(listener);
ioc = QIO_CHANNEL(sioc);
trace_cpr_transfer_input(addr->u.socket.u.q_unix.path);
trace_cpr_transfer_input(
addr->u.socket.type == SOCKET_ADDRESS_TYPE_UNIX ?
addr->u.socket.u.q_unix.path : addr->u.socket.u.fd.str);
qio_channel_set_name(ioc, "cpr-in");
return qemu_file_new_input(ioc);