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f8bbc12863
As a start, use QEMUFile to store the destination and close it. qemu_get_fd gets a file descriptor that will be used by the write callbacks. Reviewed-by: Orit Wasserman <owasserm@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
80 lines
1.8 KiB
C
80 lines
1.8 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
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*
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* Authors:
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* Chris Lalancette <clalance@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-common.h"
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#include "qemu/sockets.h"
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#include "migration/migration.h"
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#include "monitor/monitor.h"
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#include "migration/qemu-file.h"
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#include "block/block.h"
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//#define DEBUG_MIGRATION_FD
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#ifdef DEBUG_MIGRATION_FD
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#define DPRINTF(fmt, ...) \
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do { printf("migration-fd: " fmt, ## __VA_ARGS__); } while (0)
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#else
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#define DPRINTF(fmt, ...) \
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do { } while (0)
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#endif
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static int fd_errno(MigrationState *s)
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{
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return errno;
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}
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static int fd_write(MigrationState *s, const void * buf, size_t size)
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{
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return write(s->fd, buf, size);
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}
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void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error **errp)
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{
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int fd = monitor_get_fd(cur_mon, fdname, errp);
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if (fd == -1) {
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return;
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}
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s->migration_file = qemu_fdopen(fd, "wb");
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s->get_error = fd_errno;
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s->write = fd_write;
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migrate_fd_connect(s);
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}
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static void fd_accept_incoming_migration(void *opaque)
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{
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QEMUFile *f = opaque;
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qemu_set_fd_handler2(qemu_get_fd(f), NULL, NULL, NULL, NULL);
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process_incoming_migration(f);
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}
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void fd_start_incoming_migration(const char *infd, Error **errp)
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{
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int fd;
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QEMUFile *f;
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DPRINTF("Attempting to start an incoming migration via fd\n");
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fd = strtol(infd, NULL, 0);
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f = qemu_fdopen(fd, "rb");
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if(f == NULL) {
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error_setg_errno(errp, errno, "failed to open the source descriptor");
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return;
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}
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qemu_set_fd_handler2(fd, NULL, fd_accept_incoming_migration, NULL, f);
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}
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