Yaya48
cf256aa081
Upstream: https://gitlab.com/qemu-project/qemu.git Upstream-Commit: d2e570cc0f97b936902a5b1b86b73c0f5998b475
117 lines
2.7 KiB
C
117 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 <[email protected]>
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* Daniel P. Berrange <[email protected]>
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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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QIOChannel *fd_connect_outgoing(MigrationState *s, const char *fdname,
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Error **errp)
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{
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QIOChannel *ioc = NULL;
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int fd = monitor_get_fd(monitor_cur(), fdname, errp);
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if (fd == -1) {
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goto out;
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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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goto out;
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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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goto out;
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}
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qio_channel_set_name(ioc, "migration-fd-outgoing");
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out:
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return 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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