static int qemu_rbd_open(BlockDriverState *bs, const char *filename, int flags) { BDRVRBDState *s = bs->opaque; char pool[RBD_MAX_POOL_NAME_SIZE]; char snap_buf[RBD_MAX_SNAP_NAME_SIZE]; char conf[RBD_MAX_CONF_SIZE]; char clientname_buf[RBD_MAX_CONF_SIZE]; char *clientname; int r; if (qemu_rbd_parsename(filename, pool, sizeof(pool), snap_buf, sizeof(snap_buf), s->name, sizeof(s->name), conf, sizeof(conf)) < 0) { return -EINVAL; } s->snap = NULL; if (snap_buf[0] != '\0') { s->snap = g_strdup(snap_buf); } clientname = qemu_rbd_parse_clientname(conf, clientname_buf); r = rados_create(&s->cluster, clientname); if (r < 0) { error_report("error initializing"); return r; } if (strstr(conf, "conf=") == NULL) { r = rados_conf_read_file(s->cluster, NULL); if (r < 0) { error_report("error reading config file"); rados_shutdown(s->cluster); return r; } } if (conf[0] != '\0') { r = qemu_rbd_set_conf(s->cluster, conf); if (r < 0) { error_report("error setting config options"); rados_shutdown(s->cluster); return r; } } r = rados_connect(s->cluster); if (r < 0) { error_report("error connecting"); rados_shutdown(s->cluster); return r; } r = rados_ioctx_create(s->cluster, pool, &s->io_ctx); if (r < 0) { error_report("error opening pool %s", pool); rados_shutdown(s->cluster); return r; } r = rbd_open(s->io_ctx, s->name, &s->image, s->snap); if (r < 0) { error_report("error reading header from %s", s->name); rados_ioctx_destroy(s->io_ctx); rados_shutdown(s->cluster); return r; } bs->read_only = (s->snap != NULL); s->event_reader_pos = 0; r = qemu_pipe(s->fds); if (r < 0) { error_report("error opening eventfd"); goto failed; } fcntl(s->fds[0], F_SETFL, O_NONBLOCK); fcntl(s->fds[1], F_SETFL, O_NONBLOCK); qemu_aio_set_fd_handler(s->fds[RBD_FD_READ], qemu_rbd_aio_event_reader, NULL, qemu_rbd_aio_flush_cb, NULL, s); return 0; failed: rbd_close(s->image); rados_ioctx_destroy(s->io_ctx); rados_shutdown(s->cluster); return r; }