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f523e5aa5f
Move this CPR-specific code into a cpr file. While here, give the functions more significant names. This makes the new idea (after cpr-transfer) of having two parts to qmp_migrate slightly more obvious: either wait for the hangup or continue directly. Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Prasad Pandit <pjp@fedoraproject.org> Link: https://lore.kernel.org/qemu-devel/20260123141656.6765-24-farosas@suse.de Signed-off-by: Fabiano Rosas <farosas@suse.de>
98 lines
3.1 KiB
C
98 lines
3.1 KiB
C
/*
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* Copyright (c) 2022, 2024 Oracle and/or its affiliates.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "qapi/clone-visitor.h"
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#include "qapi/error.h"
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#include "qapi/qapi-visit-migration.h"
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#include "io/channel.h"
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#include "io/channel-file.h"
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#include "io/channel-socket.h"
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#include "io/net-listener.h"
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#include "migration/cpr.h"
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#include "migration/migration.h"
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#include "migration/savevm.h"
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#include "migration/qemu-file.h"
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#include "migration/vmstate.h"
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#include "trace.h"
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QEMUFile *cpr_transfer_output(MigrationChannel *channel, Error **errp)
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{
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MigrationAddress *addr = channel->addr;
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if (addr->transport == MIGRATION_ADDRESS_TYPE_SOCKET &&
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addr->u.socket.type == SOCKET_ADDRESS_TYPE_UNIX) {
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g_autoptr(QIOChannelSocket) sioc = qio_channel_socket_new();
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QIOChannel *ioc = QIO_CHANNEL(sioc);
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SocketAddress *saddr = &addr->u.socket;
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if (qio_channel_socket_connect_sync(sioc, saddr, errp) < 0) {
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return NULL;
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}
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trace_cpr_transfer_output(addr->u.socket.u.q_unix.path);
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qio_channel_set_name(ioc, "cpr-out");
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return qemu_file_new_output(ioc);
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} else {
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error_setg(errp, "bad cpr channel address; must be unix");
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return NULL;
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}
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}
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QEMUFile *cpr_transfer_input(MigrationChannel *channel, Error **errp)
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{
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MigrationAddress *addr = channel->addr;
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if (addr->transport == MIGRATION_ADDRESS_TYPE_SOCKET &&
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(addr->u.socket.type == SOCKET_ADDRESS_TYPE_UNIX ||
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addr->u.socket.type == SOCKET_ADDRESS_TYPE_FD)) {
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g_autoptr(QIOChannelSocket) sioc = NULL;
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SocketAddress *saddr = &addr->u.socket;
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g_autoptr(QIONetListener) listener = qio_net_listener_new();
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QIOChannel *ioc;
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qio_net_listener_set_name(listener, "cpr-socket-listener");
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if (qio_net_listener_open_sync(listener, saddr, 1, errp) < 0) {
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return NULL;
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}
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sioc = qio_net_listener_wait_client(listener);
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ioc = QIO_CHANNEL(sioc);
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trace_cpr_transfer_input(
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addr->u.socket.type == SOCKET_ADDRESS_TYPE_UNIX ?
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addr->u.socket.u.q_unix.path : addr->u.socket.u.fd.str);
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qio_channel_set_name(ioc, "cpr-in");
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return qemu_file_new_input(ioc);
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} else {
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error_setg(errp, "bad cpr channel socket type; must be unix");
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return NULL;
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}
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}
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void cpr_transfer_add_hup_watch(MigrationState *s, QIOChannelFunc func,
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void *opaque)
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{
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s->hup_source = qio_channel_create_watch(cpr_state_ioc(), G_IO_HUP);
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g_source_set_callback(s->hup_source,
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(GSourceFunc)func,
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QAPI_CLONE(MigrationAddress, opaque),
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(GDestroyNotify)qapi_free_MigrationAddress);
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g_source_attach(s->hup_source, NULL);
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}
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void cpr_transfer_source_destroy(MigrationState *s)
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{
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if (s->hup_source) {
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g_source_destroy(s->hup_source);
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g_source_unref(s->hup_source);
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s->hup_source = NULL;
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}
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}
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