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86a0ceb1ce
To make it easier to follow the code, rename the functions that start the migration thread and migration coroutine to contain the word "start". This will give new contributors the chance of seeing the word start and reaching the actual migration code, instead of twists and turns of qio_channel_add_watch and qio_task_run_in_thread. Remove all other instances of "start" and use wording more suitable to what the current migration stage is. The transport code such as fd_start_migration_outgoing becomes fd_connect_outgoing, the early setup code such as qemu_start_incoming_migration becomes qemu_setup_incoming_migration and so on. Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Prasad Pandit <pjp@fedoraproject.org> Link: https://lore.kernel.org/qemu-devel/20260123141656.6765-18-farosas@suse.de Signed-off-by: Fabiano Rosas <farosas@suse.de>
116 lines
2.7 KiB
C
116 lines
2.7 KiB
C
/*
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* QEMU live migration via generic fd
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*
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* Copyright Red Hat, Inc. 2009-2016
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*
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* Authors:
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* Chris Lalancette <clalance@redhat.com>
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* Daniel P. Berrange <berrange@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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* Contributions after 2012-01-13 are licensed under the terms of the
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* GNU GPL, version 2 or (at your option) any later version.
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*/
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#include "qemu/osdep.h"
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#include "channel.h"
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#include "fd.h"
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#include "file.h"
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#include "migration.h"
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#include "monitor/monitor.h"
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#include "qemu/error-report.h"
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#include "qemu/sockets.h"
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#include "io/channel-util.h"
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#include "trace.h"
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#include "qapi/error.h"
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static bool fd_is_pipe(int fd)
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{
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struct stat statbuf;
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if (fstat(fd, &statbuf) == -1) {
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return false;
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}
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return S_ISFIFO(statbuf.st_mode);
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}
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static bool migration_fd_valid(int fd)
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{
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if (fd_is_socket(fd)) {
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return true;
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}
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if (fd_is_pipe(fd)) {
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return true;
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}
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return false;
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}
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void fd_connect_outgoing(MigrationState *s, const char *fdname, Error **errp)
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{
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QIOChannel *ioc;
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int fd = monitor_get_fd(monitor_cur(), fdname, errp);
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if (fd == -1) {
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return;
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}
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if (!migration_fd_valid(fd)) {
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error_setg(errp, "fd: migration to a file is not supported."
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" Use file: instead.");
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return;
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}
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trace_migration_fd_outgoing(fd);
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ioc = qio_channel_new_fd(fd, errp);
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if (!ioc) {
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close(fd);
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return;
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}
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qio_channel_set_name(ioc, "migration-fd-outgoing");
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migration_channel_connect_outgoing(s, ioc);
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object_unref(OBJECT(ioc));
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}
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static gboolean fd_accept_incoming_migration(QIOChannel *ioc,
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GIOCondition condition,
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gpointer opaque)
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{
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migration_channel_process_incoming(ioc);
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object_unref(OBJECT(ioc));
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return G_SOURCE_REMOVE;
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}
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void fd_connect_incoming(const char *fdname, Error **errp)
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{
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QIOChannel *ioc;
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int fd = monitor_fd_param(monitor_cur(), fdname, errp);
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if (fd == -1) {
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return;
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}
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if (!migration_fd_valid(fd)) {
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error_setg(errp, "fd: migration to a file is not supported."
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" Use file: instead.");
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return;
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}
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trace_migration_fd_incoming(fd);
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ioc = qio_channel_new_fd(fd, errp);
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if (!ioc) {
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close(fd);
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return;
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}
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qio_channel_set_name(ioc, "migration-fd-incoming");
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qio_channel_add_watch_full(ioc, G_IO_IN,
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fd_accept_incoming_migration,
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NULL, NULL,
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g_main_context_get_thread_default());
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}
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