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d99598cc99
Coverity defects 1005733 & 1005734 complain about passing a negative value to closesocket in the error paths on incoming migration. Stash the error value and print it in the message (previously we gave no indication of the reason for the failure) Use error_report Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
104 lines
2.4 KiB
C
104 lines
2.4 KiB
C
/*
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* QEMU live migration via Unix Domain Sockets
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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 <string.h>
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#include "qemu-common.h"
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#include "qemu/error-report.h"
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#include "qemu/sockets.h"
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#include "qemu/main-loop.h"
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#include "migration/migration.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_UNIX
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#ifdef DEBUG_MIGRATION_UNIX
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#define DPRINTF(fmt, ...) \
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do { printf("migration-unix: " 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 void unix_wait_for_connect(int fd, void *opaque)
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{
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MigrationState *s = opaque;
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if (fd < 0) {
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DPRINTF("migrate connect error\n");
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s->file = NULL;
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migrate_fd_error(s);
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} else {
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DPRINTF("migrate connect success\n");
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s->file = qemu_fopen_socket(fd, "wb");
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migrate_fd_connect(s);
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}
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}
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void unix_start_outgoing_migration(MigrationState *s, const char *path, Error **errp)
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{
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unix_nonblocking_connect(path, unix_wait_for_connect, s, errp);
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}
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static void unix_accept_incoming_migration(void *opaque)
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{
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struct sockaddr_un addr;
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socklen_t addrlen = sizeof(addr);
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int s = (intptr_t)opaque;
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QEMUFile *f;
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int c, err;
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do {
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c = qemu_accept(s, (struct sockaddr *)&addr, &addrlen);
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err = errno;
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} while (c < 0 && err == EINTR);
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qemu_set_fd_handler2(s, NULL, NULL, NULL, NULL);
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close(s);
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DPRINTF("accepted migration\n");
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if (c < 0) {
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error_report("could not accept migration connection (%s)",
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strerror(err));
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return;
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}
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f = qemu_fopen_socket(c, "rb");
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if (f == NULL) {
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error_report("could not qemu_fopen socket");
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goto out;
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}
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process_incoming_migration(f);
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return;
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out:
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close(c);
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}
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void unix_start_incoming_migration(const char *path, Error **errp)
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{
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int s;
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s = unix_listen(path, NULL, 0, errp);
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if (s < 0) {
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return;
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}
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qemu_set_fd_handler2(s, NULL, unix_accept_incoming_migration, NULL,
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(void *)(intptr_t)s);
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}
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