#include <rbd/librbd.h>
#include "qapi/error.h"
#include "qemu/error-report.h"
+#include "qemu/module.h"
#include "qemu/option.h"
#include "block/block_int.h"
+#include "block/qdict.h"
#include "crypto/secret.h"
#include "qemu/cutils.h"
#include "qapi/qmp/qstring.h"
rbd_image_t image;
char *image_name;
char *snap;
+ uint64_t image_size;
} BDRVRBDState;
static int qemu_rbd_connect(rados_t *cluster, rados_ioctx_t *io_ctx,
done:
g_free(buf);
- QDECREF(keypairs);
+ qobject_unref(keypairs);
return;
}
-static int qemu_rbd_set_auth(rados_t cluster, const char *secretid,
+static void qemu_rbd_refresh_limits(BlockDriverState *bs, Error **errp)
+{
+ /* XXX Does RBD support AIO on less than 512-byte alignment? */
+ bs->bl.request_alignment = 512;
+}
+
+
+static int qemu_rbd_set_auth(rados_t cluster, BlockdevOptionsRbd *opts,
Error **errp)
{
- if (secretid == 0) {
- return 0;
- }
+ char *key, *acr;
+ int r;
+ GString *accu;
+ RbdAuthModeList *auth;
- gchar *secret = qcrypto_secret_lookup_as_base64(secretid,
- errp);
- if (!secret) {
- return -1;
+ if (opts->key_secret) {
+ key = qcrypto_secret_lookup_as_base64(opts->key_secret, errp);
+ if (!key) {
+ return -EIO;
+ }
+ r = rados_conf_set(cluster, "key", key);
+ g_free(key);
+ if (r < 0) {
+ error_setg_errno(errp, -r, "Could not set 'key'");
+ return r;
+ }
}
- rados_conf_set(cluster, "key", secret);
- g_free(secret);
+ if (opts->has_auth_client_required) {
+ accu = g_string_new("");
+ for (auth = opts->auth_client_required; auth; auth = auth->next) {
+ if (accu->str[0]) {
+ g_string_append_c(accu, ';');
+ }
+ g_string_append(accu, RbdAuthMode_str(auth->value));
+ }
+ acr = g_string_free(accu, FALSE);
+ r = rados_conf_set(cluster, "auth_client_required", acr);
+ g_free(acr);
+ if (r < 0) {
+ error_setg_errno(errp, -r,
+ "Could not set 'auth_client_required'");
+ return r;
+ }
+ }
return 0;
}
if (!keypairs_json) {
return ret;
}
- keypairs = qobject_to_qlist(qobject_from_json(keypairs_json,
- &error_abort));
+ keypairs = qobject_to(QList,
+ qobject_from_json(keypairs_json, &error_abort));
remaining = qlist_size(keypairs) / 2;
assert(remaining);
while (remaining--) {
- name = qobject_to_qstring(qlist_pop(keypairs));
- value = qobject_to_qstring(qlist_pop(keypairs));
+ name = qobject_to(QString, qlist_pop(keypairs));
+ value = qobject_to(QString, qlist_pop(keypairs));
assert(name && value);
key = qstring_get_str(name);
ret = rados_conf_set(cluster, key, qstring_get_str(value));
- QDECREF(value);
+ qobject_unref(value);
if (ret < 0) {
error_setg_errno(errp, -ret, "invalid conf option %s", key);
- QDECREF(name);
+ qobject_unref(name);
ret = -EINVAL;
break;
}
- QDECREF(name);
+ qobject_unref(name);
}
- QDECREF(keypairs);
+ qobject_unref(keypairs);
return ret;
}
},
};
-/* FIXME Deprecate and remove keypairs or make it available in QMP.
- * password_secret should eventually be configurable in opts->location. Support
- * for it in .bdrv_open will make it work here as well. */
+/* FIXME Deprecate and remove keypairs or make it available in QMP. */
static int qemu_rbd_do_create(BlockdevCreateOptions *options,
const char *keypairs, const char *password_secret,
Error **errp)
}
exit:
- QDECREF(options);
+ qobject_unref(options);
qapi_free_BlockdevCreateOptions(create_options);
return ret;
}
Error *local_err = NULL;
int r;
+ if (secretid) {
+ if (opts->key_secret) {
+ error_setg(errp,
+ "Legacy 'password-secret' clashes with 'key-secret'");
+ return -EINVAL;
+ }
+ opts->key_secret = g_strdup(secretid);
+ opts->has_key_secret = true;
+ }
+
mon_host = qemu_rbd_mon_host(opts, &local_err);
if (local_err) {
error_propagate(errp, local_err);
}
}
- if (qemu_rbd_set_auth(*cluster, secretid, errp) < 0) {
- r = -EIO;
+ r = qemu_rbd_set_auth(*cluster, opts, errp);
+ if (r < 0) {
goto failed_shutdown;
}
return r;
}
+static int qemu_rbd_convert_options(QDict *options, BlockdevOptionsRbd **opts,
+ Error **errp)
+{
+ Visitor *v;
+ Error *local_err = NULL;
+
+ /* Convert the remaining options into a QAPI object */
+ v = qobject_input_visitor_new_flat_confused(options, errp);
+ if (!v) {
+ return -EINVAL;
+ }
+
+ visit_type_BlockdevOptionsRbd(v, NULL, opts, &local_err);
+ visit_free(v);
+
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+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 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");
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;
- }
+ r = qemu_rbd_convert_options(options, &opts, &local_err);
+ if (local_err) {
+ /* If keypairs are present, that means some options are present in
+ * the modern option format. Don't attempt to parse legacy option
+ * formats, as we won't support mixed usage. */
+ if (keypairs) {
+ error_propagate(errp, local_err);
+ goto out;
+ }
- v = qobject_input_visitor_new_keyval(crumpled);
- visit_type_BlockdevOptionsRbd(v, NULL, &opts, &local_err);
- visit_free(v);
- qobject_decref(crumpled);
+ /* If the initial attempt to convert and process the options failed,
+ * we may be attempting to open an image file that has the rbd options
+ * specified in the older format consisting of all key/value pairs
+ * encoded in the filename. Go ahead and attempt to parse the
+ * filename, and see if we can pull out the required options. */
+ r = qemu_rbd_attempt_legacy_options(options, &opts, &keypairs);
+ if (r < 0) {
+ /* Propagate the original error, not the legacy parsing fallback
+ * error, as the latter was just a best-effort attempt. */
+ error_propagate(errp, local_err);
+ goto out;
+ }
+ /* Take care whenever deciding to actually deprecate; once this ability
+ * is removed, we will not be able to open any images with legacy-styled
+ * backing image strings. */
+ warn_report("RBD options encoded in the filename as keyvalue pairs "
+ "is deprecated");
+ }
- 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,
goto failed_open;
}
+ r = rbd_get_size(s->image, &s->image_size);
+ if (r < 0) {
+ error_setg_errno(errp, -r, "error getting image size from %s",
+ s->image_name);
+ rbd_close(s->image);
+ 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 = bdrv_apply_auto_read_only(bs, "rbd snapshots are read-only", errp);
+ if (r < 0) {
+ rbd_close(s->image);
+ goto failed_open;
}
}
rados_shutdown(s->cluster);
}
+/* Resize the RBD image and update the 'image_size' with the current size */
+static int qemu_rbd_resize(BlockDriverState *bs, uint64_t size)
+{
+ BDRVRBDState *s = bs->opaque;
+ int r;
+
+ r = rbd_resize(s->image, size);
+ if (r < 0) {
+ return r;
+ }
+
+ s->image_size = size;
+
+ return 0;
+}
+
static const AIOCBInfo rbd_aiocb_info = {
.aiocb_size = sizeof(RBDAIOCB),
};
}
switch (cmd) {
- case RBD_AIO_WRITE:
+ case RBD_AIO_WRITE: {
+ /*
+ * RBD APIs don't allow us to write more than actual size, so in order
+ * to support growing images, we resize the image before write
+ * operations that exceed the current size.
+ */
+ if (off + size > s->image_size) {
+ r = qemu_rbd_resize(bs, off + size);
+ if (r < 0) {
+ goto failed_completion;
+ }
+ }
#ifdef LIBRBD_SUPPORTS_IOVEC
r = rbd_aio_writev(s->image, qiov->iov, qiov->niov, off, c);
#else
r = rbd_aio_write(s->image, off, size, rcb->buf, c);
#endif
break;
+ }
case RBD_AIO_READ:
#ifdef LIBRBD_SUPPORTS_IOVEC
r = rbd_aio_readv(s->image, qiov->iov, qiov->niov, off, c);
return NULL;
}
-static BlockAIOCB *qemu_rbd_aio_readv(BlockDriverState *bs,
- int64_t sector_num,
- QEMUIOVector *qiov,
- int nb_sectors,
- BlockCompletionFunc *cb,
- void *opaque)
+static BlockAIOCB *qemu_rbd_aio_preadv(BlockDriverState *bs,
+ uint64_t offset, uint64_t bytes,
+ QEMUIOVector *qiov, int flags,
+ BlockCompletionFunc *cb,
+ void *opaque)
{
- return rbd_start_aio(bs, sector_num << BDRV_SECTOR_BITS, qiov,
- (int64_t) nb_sectors << BDRV_SECTOR_BITS, cb, opaque,
+ return rbd_start_aio(bs, offset, qiov, bytes, cb, opaque,
RBD_AIO_READ);
}
-static BlockAIOCB *qemu_rbd_aio_writev(BlockDriverState *bs,
- int64_t sector_num,
- QEMUIOVector *qiov,
- int nb_sectors,
- BlockCompletionFunc *cb,
- void *opaque)
+static BlockAIOCB *qemu_rbd_aio_pwritev(BlockDriverState *bs,
+ uint64_t offset, uint64_t bytes,
+ QEMUIOVector *qiov, int flags,
+ BlockCompletionFunc *cb,
+ void *opaque)
{
- return rbd_start_aio(bs, sector_num << BDRV_SECTOR_BITS, qiov,
- (int64_t) nb_sectors << BDRV_SECTOR_BITS, cb, opaque,
+ return rbd_start_aio(bs, offset, qiov, bytes, cb, opaque,
RBD_AIO_WRITE);
}
return info.size;
}
-static int qemu_rbd_truncate(BlockDriverState *bs, int64_t offset,
- PreallocMode prealloc, Error **errp)
+static int coroutine_fn qemu_rbd_co_truncate(BlockDriverState *bs,
+ int64_t offset,
+ PreallocMode prealloc,
+ Error **errp)
{
- BDRVRBDState *s = bs->opaque;
int r;
if (prealloc != PREALLOC_MODE_OFF) {
return -ENOTSUP;
}
- r = rbd_resize(s->image, offset);
+ r = qemu_rbd_resize(bs, offset);
if (r < 0) {
error_setg_errno(errp, -r, "Failed to resize file");
return r;
}
};
+static const char *const qemu_rbd_strong_runtime_opts[] = {
+ "pool",
+ "image",
+ "conf",
+ "snapshot",
+ "user",
+ "server.",
+ "password-secret",
+
+ NULL
+};
+
static BlockDriver bdrv_rbd = {
.format_name = "rbd",
.instance_size = sizeof(BDRVRBDState),
.bdrv_parse_filename = qemu_rbd_parse_filename,
+ .bdrv_refresh_limits = qemu_rbd_refresh_limits,
.bdrv_file_open = qemu_rbd_open,
.bdrv_close = qemu_rbd_close,
.bdrv_reopen_prepare = qemu_rbd_reopen_prepare,
.bdrv_get_info = qemu_rbd_getinfo,
.create_opts = &qemu_rbd_create_opts,
.bdrv_getlength = qemu_rbd_getlength,
- .bdrv_truncate = qemu_rbd_truncate,
+ .bdrv_co_truncate = qemu_rbd_co_truncate,
.protocol_name = "rbd",
- .bdrv_aio_readv = qemu_rbd_aio_readv,
- .bdrv_aio_writev = qemu_rbd_aio_writev,
+ .bdrv_aio_preadv = qemu_rbd_aio_preadv,
+ .bdrv_aio_pwritev = qemu_rbd_aio_pwritev,
#ifdef LIBRBD_SUPPORTS_AIO_FLUSH
.bdrv_aio_flush = qemu_rbd_aio_flush,
#ifdef LIBRBD_SUPPORTS_INVALIDATE
.bdrv_co_invalidate_cache = qemu_rbd_co_invalidate_cache,
#endif
+
+ .strong_runtime_opts = qemu_rbd_strong_runtime_opts,
};
static void bdrv_rbd_init(void)
projects / mirror_qemu.git / blobdiff