static int qemu_rbd_open(BlockDriverState *bs, QDict *options, int flags, Error **errp) { 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; QemuOpts *opts; Error *local_err = NULL; const char *filename; int r; opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort); qemu_opts_absorb_qdict(opts, options, &local_err); if (local_err) { error_propagate(errp, local_err); qemu_opts_del(opts); return -EINVAL; } filename = qemu_opt_get(opts, "filename"); if (qemu_rbd_parsename(filename, pool, sizeof(pool), snap_buf, sizeof(snap_buf), s->name, sizeof(s->name), conf, sizeof(conf), errp) < 0) { r = -EINVAL; goto failed_opts; } clientname = qemu_rbd_parse_clientname(conf, clientname_buf); r = rados_create(&s->cluster, clientname); if (r < 0) { error_setg(&local_err, "error initializing"); goto failed_opts; } s->snap = NULL; if (snap_buf[0] != '\0') { s->snap = g_strdup(snap_buf); } /* * Fallback to more conservative semantics if setting cache * options fails. Ignore errors from setting rbd_cache because the * only possible error is that the option does not exist, and * librbd defaults to no caching. If write through caching cannot * be set up, fall back to no caching. */ if (flags & BDRV_O_NOCACHE) { rados_conf_set(s->cluster, "rbd_cache", "false"); } else { rados_conf_set(s->cluster, "rbd_cache", "true"); } if (strstr(conf, "conf=") == NULL) { /* try default location, but ignore failure */ rados_conf_read_file(s->cluster, NULL); } if (conf[0] != '\0') { r = qemu_rbd_set_conf(s->cluster, conf, errp); if (r < 0) { goto failed_shutdown; } } r = rados_connect(s->cluster); if (r < 0) { error_setg(&local_err, "error connecting"); goto failed_shutdown; } r = rados_ioctx_create(s->cluster, pool, &s->io_ctx); if (r < 0) { error_setg(&local_err, "error opening pool %s", pool); goto failed_shutdown; } r = rbd_open(s->io_ctx, s->name, &s->image, s->snap); if (r < 0) { error_setg(&local_err, "error reading header from %s", s->name); goto failed_open; } bs->read_only = (s->snap != NULL); qemu_opts_del(opts); return 0; failed_open: rados_ioctx_destroy(s->io_ctx); failed_shutdown: rados_shutdown(s->cluster); g_free(s->snap); failed_opts: qemu_opts_del(opts); return r; }
static int qemu_rbd_open(BlockDriverState *bs, QDict *options, int flags, Error **errp) { 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; QemuOpts *opts; Error *local_err = NULL; const char *filename; int r; opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort); qemu_opts_absorb_qdict(opts, options, &local_err); if (local_err) { error_propagate(errp, local_err); qemu_opts_del(opts); return -EINVAL; } filename = qemu_opt_get(opts, "filename"); if (qemu_rbd_parsename(filename, pool, sizeof(pool), snap_buf, sizeof(snap_buf), s->name, sizeof(s->name), conf, sizeof(conf), errp) < 0) { r = -EINVAL; goto failed_opts; } clientname = qemu_rbd_parse_clientname(conf, clientname_buf); r = rados_create(&s->cluster, clientname); if (r < 0) { error_setg(&local_err, "error initializing"); goto failed_opts; } s->snap = NULL; if (snap_buf[0] != '\0') { s->snap = g_strdup(snap_buf); }   if (flags & BDRV_O_NOCACHE) { rados_conf_set(s->cluster, "rbd_cache", "false"); } else { rados_conf_set(s->cluster, "rbd_cache", "true"); } if (strstr(conf, "conf=") == NULL) {   rados_conf_read_file(s->cluster, NULL); } if (conf[0] != '\0') { r = qemu_rbd_set_conf(s->cluster, conf, errp); if (r < 0) { goto failed_shutdown; } } r = rados_connect(s->cluster); if (r < 0) { error_setg(&local_err, "error connecting"); goto failed_shutdown; } r = rados_ioctx_create(s->cluster, pool, &s->io_ctx); if (r < 0) { error_setg(&local_err, "error opening pool %s", pool); goto failed_shutdown; } r = rbd_open(s->io_ctx, s->name, &s->image, s->snap); if (r < 0) { error_setg(&local_err, "error reading header from %s", s->name); goto failed_open; } bs->read_only = (s->snap != NULL); qemu_opts_del(opts); return 0; failed_open: rados_ioctx_destroy(s->io_ctx); failed_shutdown: rados_shutdown(s->cluster); g_free(s->snap); failed_opts: qemu_opts_del(opts); return r; }