static int qemu_rbd_attempt_legacy_options(QDict *options,
BlockdevOptionsRbd **opts,
char **keypairs)
{
char *filename;
int r;
filename = g_strdup(qdict_get_try_str(options, "filename"));
if (!filename) {
return -EINVAL;
}
qdict_del(options, "filename");
qemu_rbd_parse_filename(filename, options, NULL);
/* keypairs freed by caller */
*keypairs = g_strdup(qdict_get_try_str(options, "=keyvalue-pairs"));
if (*keypairs) {
qdict_del(options, "=keyvalue-pairs");
}
r = qemu_rbd_convert_options(options, opts, NULL);
g_free(filename);
return r;
}
static int coroutine_fn qemu_rbd_co_create_opts(const char *filename,
QemuOpts *opts,
Error **errp)
{
BlockdevCreateOptions *create_options;
BlockdevCreateOptionsRbd *rbd_opts;
BlockdevOptionsRbd *loc;
Error *local_err = NULL;
const char *keypairs, *password_secret;
QDict *options = NULL;
int ret = 0;
create_options = g_new0(BlockdevCreateOptions, 1);
create_options->driver = BLOCKDEV_DRIVER_RBD;
rbd_opts = &create_options->u.rbd;
rbd_opts->location = g_new0(BlockdevOptionsRbd, 1);
password_secret = qemu_opt_get(opts, "password-secret");
/* Read out options */
rbd_opts->size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
rbd_opts->cluster_size = qemu_opt_get_size_del(opts,
BLOCK_OPT_CLUSTER_SIZE, 0);
rbd_opts->has_cluster_size = (rbd_opts->cluster_size != 0);
options = qdict_new();
qemu_rbd_parse_filename(filename, options, &local_err);
if (local_err) {
ret = -EINVAL;
error_propagate(errp, local_err);
goto exit;
}
/*
* Caution: while qdict_get_try_str() is fine, getting non-string
* types would require more care. When @options come from -blockdev
* or blockdev_add, its members are typed according to the QAPI
* schema, but when they come from -drive, they're all QString.
*/
loc = rbd_opts->location;
loc->pool = g_strdup(qdict_get_try_str(options, "pool"));
loc->conf = g_strdup(qdict_get_try_str(options, "conf"));
loc->has_conf = !!loc->conf;
loc->user = g_strdup(qdict_get_try_str(options, "user"));
loc->has_user = !!loc->user;
loc->image = g_strdup(qdict_get_try_str(options, "image"));
keypairs = qdict_get_try_str(options, "=keyvalue-pairs");
ret = qemu_rbd_do_create(create_options, keypairs, password_secret, errp);
if (ret < 0) {
goto exit;
}
exit:
qobject_unref(options);
qapi_free_BlockdevCreateOptions(create_options);
return ret;
}
static int qemu_rbd_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
BDRVRBDState *s = bs->opaque;
const char *pool, *snap, *conf, *user, *image_name, *keypairs;
const char *secretid, *filename;
QemuOpts *opts;
Error *local_err = NULL;
char *mon_host = NULL;
int r;
/* If we are given a filename, parse the filename, with precedence given to
* filename encoded options */
filename = qdict_get_try_str(options, "filename");
if (filename) {
warn_report("'filename' option specified. "
"This is an unsupported option, and may be deprecated "
"in the future");
qemu_rbd_parse_filename(filename, options, &local_err);
if (local_err) {
r = -EINVAL;
error_propagate(errp, local_err);
goto exit;
}
}
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);
r = -EINVAL;
goto failed_opts;
}
mon_host = qemu_rbd_mon_host(options, &local_err);
if (local_err) {
error_propagate(errp, local_err);
r = -EINVAL;
goto failed_opts;
}
secretid = qemu_opt_get(opts, "password-secret");
pool = qemu_opt_get(opts, "pool");
conf = qemu_opt_get(opts, "conf");
snap = qemu_opt_get(opts, "snapshot");
user = qemu_opt_get(opts, "user");
image_name = qemu_opt_get(opts, "image");
keypairs = qemu_opt_get(opts, "=keyvalue-pairs");
if (!pool || !image_name) {
error_setg(errp, "Parameters 'pool' and 'image' are required");
r = -EINVAL;
goto failed_opts;
}
r = rados_create(&s->cluster, user);
if (r < 0) {
error_setg_errno(errp, -r, "error initializing");
goto failed_opts;
}
s->snap = g_strdup(snap);
s->image_name = g_strdup(image_name);
/* try default location when conf=NULL, but ignore failure */
r = rados_conf_read_file(s->cluster, conf);
if (conf && r < 0) {
error_setg_errno(errp, -r, "error reading conf file %s", conf);
goto failed_shutdown;
}
r = qemu_rbd_set_keypairs(s->cluster, keypairs, errp);
if (r < 0) {
goto failed_shutdown;
}
if (mon_host) {
r = rados_conf_set(s->cluster, "mon_host", mon_host);
if (r < 0) {
goto failed_shutdown;
}
}
if (qemu_rbd_set_auth(s->cluster, secretid, errp) < 0) {
r = -EIO;
goto failed_shutdown;
}
/*
* 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");
}
r = rados_connect(s->cluster);
if (r < 0) {
error_setg_errno(errp, -r, "error connecting");
goto failed_shutdown;
}
r = rados_ioctx_create(s->cluster, pool, &s->io_ctx);
if (r < 0) {
error_setg_errno(errp, -r, "error opening pool %s", pool);
goto failed_shutdown;
}
/* rbd_open is always r/w */
r = rbd_open(s->io_ctx, s->image_name, &s->image, s->snap);
if (r < 0) {
error_setg_errno(errp, -r, "error reading header from %s",
s->image_name);
goto failed_open;
}
/* If we are using an rbd snapshot, we must be r/o, otherwise
* leave as-is */
if (s->snap != NULL) {
if (!bdrv_is_read_only(bs)) {
error_report("Opening rbd snapshots without an explicit "
"read-only=on option is deprecated. Future versions "
"will refuse to open the image instead of "
"automatically marking the image read-only.");
r = bdrv_set_read_only(bs, true, &local_err);
if (r < 0) {
error_propagate(errp, local_err);
goto failed_open;
}
}
}
qemu_opts_del(opts);
return 0;
failed_open:
rados_ioctx_destroy(s->io_ctx);
failed_shutdown:
rados_shutdown(s->cluster);
g_free(s->snap);
g_free(s->image_name);
failed_opts:
qemu_opts_del(opts);
g_free(mon_host);
exit:
return r;
}
static int coroutine_fn qemu_rbd_co_create_opts(const char *filename,
QemuOpts *opts,
Error **errp)
{
Error *local_err = NULL;
int64_t bytes = 0;
int64_t objsize;
int obj_order = 0;
const char *pool, *image_name, *conf, *user, *keypairs;
const char *secretid;
rados_t cluster;
rados_ioctx_t io_ctx;
QDict *options = NULL;
int ret = 0;
secretid = qemu_opt_get(opts, "password-secret");
/* Read out options */
bytes = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
objsize = qemu_opt_get_size_del(opts, BLOCK_OPT_CLUSTER_SIZE, 0);
if (objsize) {
if ((objsize - 1) & objsize) { /* not a power of 2? */
error_setg(errp, "obj size needs to be power of 2");
ret = -EINVAL;
goto exit;
}
if (objsize < 4096) {
error_setg(errp, "obj size too small");
ret = -EINVAL;
goto exit;
}
obj_order = ctz32(objsize);
}
options = qdict_new();
qemu_rbd_parse_filename(filename, options, &local_err);
if (local_err) {
ret = -EINVAL;
error_propagate(errp, local_err);
goto exit;
}
/*
* Caution: while qdict_get_try_str() is fine, getting non-string
* types would require more care. When @options come from -blockdev
* or blockdev_add, its members are typed according to the QAPI
* schema, but when they come from -drive, they're all QString.
*/
pool = qdict_get_try_str(options, "pool");
conf = qdict_get_try_str(options, "conf");
user = qdict_get_try_str(options, "user");
image_name = qdict_get_try_str(options, "image");
keypairs = qdict_get_try_str(options, "=keyvalue-pairs");
ret = rados_create(&cluster, user);
if (ret < 0) {
error_setg_errno(errp, -ret, "error initializing");
goto exit;
}
/* try default location when conf=NULL, but ignore failure */
ret = rados_conf_read_file(cluster, conf);
if (conf && ret < 0) {
error_setg_errno(errp, -ret, "error reading conf file %s", conf);
ret = -EIO;
goto shutdown;
}
ret = qemu_rbd_set_keypairs(cluster, keypairs, errp);
if (ret < 0) {
ret = -EIO;
goto shutdown;
}
if (qemu_rbd_set_auth(cluster, secretid, errp) < 0) {
ret = -EIO;
goto shutdown;
}
ret = rados_connect(cluster);
if (ret < 0) {
error_setg_errno(errp, -ret, "error connecting");
goto shutdown;
}
ret = rados_ioctx_create(cluster, pool, &io_ctx);
if (ret < 0) {
error_setg_errno(errp, -ret, "error opening pool %s", pool);
goto shutdown;
}
ret = rbd_create(io_ctx, image_name, bytes, &obj_order);
if (ret < 0) {
error_setg_errno(errp, -ret, "error rbd create");
}
rados_ioctx_destroy(io_ctx);
shutdown:
rados_shutdown(cluster);
exit:
QDECREF(options);
return ret;
}
static int qemu_rbd_create(const char *filename, QemuOpts *opts, Error **errp)
{
Error *local_err = NULL;
int64_t bytes = 0;
int64_t objsize;
int obj_order = 0;
const char *pool, *name, *conf, *clientname, *keypairs;
const char *secretid;
rados_t cluster;
rados_ioctx_t io_ctx;
QDict *options = NULL;
int ret = 0;
secretid = qemu_opt_get(opts, "password-secret");
/* Read out options */
bytes = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
objsize = qemu_opt_get_size_del(opts, BLOCK_OPT_CLUSTER_SIZE, 0);
if (objsize) {
if ((objsize - 1) & objsize) { /* not a power of 2? */
error_setg(errp, "obj size needs to be power of 2");
ret = -EINVAL;
goto exit;
}
if (objsize < 4096) {
error_setg(errp, "obj size too small");
ret = -EINVAL;
goto exit;
}
obj_order = ctz32(objsize);
}
options = qdict_new();
qemu_rbd_parse_filename(filename, options, &local_err);
if (local_err) {
ret = -EINVAL;
error_propagate(errp, local_err);
goto exit;
}
pool = qdict_get_try_str(options, "pool");
conf = qdict_get_try_str(options, "conf");
clientname = qdict_get_try_str(options, "user");
name = qdict_get_try_str(options, "image");
keypairs = qdict_get_try_str(options, "=keyvalue-pairs");
ret = rados_create(&cluster, clientname);
if (ret < 0) {
error_setg_errno(errp, -ret, "error initializing");
goto exit;
}
/* try default location when conf=NULL, but ignore failure */
ret = rados_conf_read_file(cluster, conf);
if (conf && ret < 0) {
error_setg_errno(errp, -ret, "error reading conf file %s", conf);
ret = -EIO;
goto shutdown;
}
ret = qemu_rbd_set_keypairs(cluster, keypairs, errp);
if (ret < 0) {
ret = -EIO;
goto shutdown;
}
if (qemu_rbd_set_auth(cluster, secretid, errp) < 0) {
ret = -EIO;
goto shutdown;
}
ret = rados_connect(cluster);
if (ret < 0) {
error_setg_errno(errp, -ret, "error connecting");
goto shutdown;
}
ret = rados_ioctx_create(cluster, pool, &io_ctx);
if (ret < 0) {
error_setg_errno(errp, -ret, "error opening pool %s", pool);
goto shutdown;
}
ret = rbd_create(io_ctx, name, bytes, &obj_order);
if (ret < 0) {
error_setg_errno(errp, -ret, "error rbd create");
}
rados_ioctx_destroy(io_ctx);
shutdown:
rados_shutdown(cluster);
exit:
QDECREF(options);
return ret;
}
static int qemu_rbd_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
BDRVRBDState *s = bs->opaque;
BlockdevOptionsRbd *opts = NULL;
Visitor *v;
QObject *crumpled = NULL;
const QDictEntry *e;
Error *local_err = NULL;
const char *filename;
char *keypairs, *secretid;
int r;
/* If we are given a filename, parse the filename, with precedence given to
* filename encoded options */
filename = qdict_get_try_str(options, "filename");
if (filename) {
warn_report("'filename' option specified. "
"This is an unsupported option, and may be deprecated "
"in the future");
qemu_rbd_parse_filename(filename, options, &local_err);
qdict_del(options, "filename");
if (local_err) {
error_propagate(errp, local_err);
return -EINVAL;
}
}
keypairs = g_strdup(qdict_get_try_str(options, "=keyvalue-pairs"));
if (keypairs) {
qdict_del(options, "=keyvalue-pairs");
}
secretid = g_strdup(qdict_get_try_str(options, "password-secret"));
if (secretid) {
qdict_del(options, "password-secret");
}
/* Convert the remaining options into a QAPI object */
crumpled = qdict_crumple(options, errp);
if (crumpled == NULL) {
r = -EINVAL;
goto out;
}
v = qobject_input_visitor_new_keyval(crumpled);
visit_type_BlockdevOptionsRbd(v, NULL, &opts, &local_err);
visit_free(v);
qobject_unref(crumpled);
if (local_err) {
error_propagate(errp, local_err);
r = -EINVAL;
goto out;
}
/* Remove the processed options from the QDict (the visitor processes
* _all_ options in the QDict) */
while ((e = qdict_first(options))) {
qdict_del(options, e->key);
}
r = qemu_rbd_connect(&s->cluster, &s->io_ctx, opts,
!(flags & BDRV_O_NOCACHE), keypairs, secretid, errp);
if (r < 0) {
goto out;
}
s->snap = g_strdup(opts->snapshot);
s->image_name = g_strdup(opts->image);
/* rbd_open is always r/w */
r = rbd_open(s->io_ctx, s->image_name, &s->image, s->snap);
if (r < 0) {
error_setg_errno(errp, -r, "error reading header from %s",
s->image_name);
goto failed_open;
}
/* If we are using an rbd snapshot, we must be r/o, otherwise
* leave as-is */
if (s->snap != NULL) {
if (!bdrv_is_read_only(bs)) {
error_report("Opening rbd snapshots without an explicit "
"read-only=on option is deprecated. Future versions "
"will refuse to open the image instead of "
"automatically marking the image read-only.");
r = bdrv_set_read_only(bs, true, &local_err);
if (r < 0) {
error_propagate(errp, local_err);
goto failed_open;
}
}
}
r = 0;
goto out;
failed_open:
rados_ioctx_destroy(s->io_ctx);
g_free(s->snap);
g_free(s->image_name);
rados_shutdown(s->cluster);
out:
qapi_free_BlockdevOptionsRbd(opts);
g_free(keypairs);
g_free(secretid);
return r;
}