1685 lines
49 KiB
C
1685 lines
49 KiB
C
/*
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* QEMU Block driver for RADOS (Ceph)
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*
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* Copyright (C) 2010-2011 Christian Brunner <chb@muc.de>,
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* Josh Durgin <josh.durgin@dreamhost.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 "qemu/osdep.h"
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#include <rbd/librbd.h>
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#include "qapi/error.h"
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#include "qemu/error-report.h"
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#include "qemu/module.h"
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#include "qemu/option.h"
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#include "block/block-io.h"
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#include "block/block_int.h"
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#include "block/qdict.h"
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#include "crypto/secret.h"
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#include "qemu/cutils.h"
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#include "sysemu/replay.h"
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#include "qapi/qmp/qstring.h"
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#include "qapi/qmp/qdict.h"
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#include "qapi/qmp/qjson.h"
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#include "qapi/qmp/qlist.h"
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#include "qapi/qobject-input-visitor.h"
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#include "qapi/qapi-visit-block-core.h"
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/*
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* When specifying the image filename use:
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*
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* rbd:poolname/devicename[@snapshotname][:option1=value1[:option2=value2...]]
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*
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* poolname must be the name of an existing rados pool.
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*
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* devicename is the name of the rbd image.
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*
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* Each option given is used to configure rados, and may be any valid
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* Ceph option, "id", or "conf".
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*
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* The "id" option indicates what user we should authenticate as to
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* the Ceph cluster. If it is excluded we will use the Ceph default
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* (normally 'admin').
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*
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* The "conf" option specifies a Ceph configuration file to read. If
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* it is not specified, we will read from the default Ceph locations
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* (e.g., /etc/ceph/ceph.conf). To avoid reading _any_ configuration
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* file, specify conf=/dev/null.
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*
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* Configuration values containing :, @, or = can be escaped with a
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* leading "\".
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*/
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#define OBJ_MAX_SIZE (1UL << OBJ_DEFAULT_OBJ_ORDER)
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#define RBD_MAX_SNAPS 100
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#define RBD_ENCRYPTION_LUKS_HEADER_VERIFICATION_LEN 8
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static const char rbd_luks_header_verification[
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RBD_ENCRYPTION_LUKS_HEADER_VERIFICATION_LEN] = {
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'L', 'U', 'K', 'S', 0xBA, 0xBE, 0, 1
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};
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static const char rbd_luks2_header_verification[
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RBD_ENCRYPTION_LUKS_HEADER_VERIFICATION_LEN] = {
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'L', 'U', 'K', 'S', 0xBA, 0xBE, 0, 2
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};
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typedef enum {
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RBD_AIO_READ,
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RBD_AIO_WRITE,
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RBD_AIO_DISCARD,
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RBD_AIO_FLUSH,
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RBD_AIO_WRITE_ZEROES
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} RBDAIOCmd;
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typedef struct BDRVRBDState {
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rados_t cluster;
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rados_ioctx_t io_ctx;
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rbd_image_t image;
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char *image_name;
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char *snap;
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char *namespace;
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uint64_t image_size;
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uint64_t object_size;
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} BDRVRBDState;
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typedef struct RBDTask {
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BlockDriverState *bs;
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Coroutine *co;
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bool complete;
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int64_t ret;
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} RBDTask;
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typedef struct RBDDiffIterateReq {
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uint64_t offs;
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uint64_t bytes;
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bool exists;
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} RBDDiffIterateReq;
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static int qemu_rbd_connect(rados_t *cluster, rados_ioctx_t *io_ctx,
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BlockdevOptionsRbd *opts, bool cache,
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const char *keypairs, const char *secretid,
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Error **errp);
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static char *qemu_rbd_strchr(char *src, char delim)
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{
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char *p;
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for (p = src; *p; ++p) {
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if (*p == delim) {
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return p;
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}
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if (*p == '\\' && p[1] != '\0') {
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++p;
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}
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}
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return NULL;
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}
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static char *qemu_rbd_next_tok(char *src, char delim, char **p)
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{
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char *end;
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*p = NULL;
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end = qemu_rbd_strchr(src, delim);
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if (end) {
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*p = end + 1;
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*end = '\0';
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}
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return src;
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}
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static void qemu_rbd_unescape(char *src)
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{
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char *p;
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for (p = src; *src; ++src, ++p) {
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if (*src == '\\' && src[1] != '\0') {
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src++;
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}
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*p = *src;
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}
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*p = '\0';
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}
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static void qemu_rbd_parse_filename(const char *filename, QDict *options,
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Error **errp)
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{
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const char *start;
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char *p, *buf;
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QList *keypairs = NULL;
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char *found_str, *image_name;
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if (!strstart(filename, "rbd:", &start)) {
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error_setg(errp, "File name must start with 'rbd:'");
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return;
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}
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buf = g_strdup(start);
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p = buf;
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found_str = qemu_rbd_next_tok(p, '/', &p);
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if (!p) {
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error_setg(errp, "Pool name is required");
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goto done;
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}
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qemu_rbd_unescape(found_str);
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qdict_put_str(options, "pool", found_str);
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if (qemu_rbd_strchr(p, '@')) {
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image_name = qemu_rbd_next_tok(p, '@', &p);
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found_str = qemu_rbd_next_tok(p, ':', &p);
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qemu_rbd_unescape(found_str);
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qdict_put_str(options, "snapshot", found_str);
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} else {
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image_name = qemu_rbd_next_tok(p, ':', &p);
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}
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/* Check for namespace in the image_name */
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if (qemu_rbd_strchr(image_name, '/')) {
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found_str = qemu_rbd_next_tok(image_name, '/', &image_name);
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qemu_rbd_unescape(found_str);
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qdict_put_str(options, "namespace", found_str);
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} else {
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qdict_put_str(options, "namespace", "");
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}
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qemu_rbd_unescape(image_name);
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qdict_put_str(options, "image", image_name);
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if (!p) {
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goto done;
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}
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/* The following are essentially all key/value pairs, and we treat
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* 'id' and 'conf' a bit special. Key/value pairs may be in any order. */
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while (p) {
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char *name, *value;
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name = qemu_rbd_next_tok(p, '=', &p);
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if (!p) {
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error_setg(errp, "conf option %s has no value", name);
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break;
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}
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qemu_rbd_unescape(name);
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value = qemu_rbd_next_tok(p, ':', &p);
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qemu_rbd_unescape(value);
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if (!strcmp(name, "conf")) {
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qdict_put_str(options, "conf", value);
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} else if (!strcmp(name, "id")) {
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qdict_put_str(options, "user", value);
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} else {
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/*
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* We pass these internally to qemu_rbd_set_keypairs(), so
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* we can get away with the simpler list of [ "key1",
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* "value1", "key2", "value2" ] rather than a raw dict
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* { "key1": "value1", "key2": "value2" } where we can't
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* guarantee order, or even a more correct but complex
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* [ { "key1": "value1" }, { "key2": "value2" } ]
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*/
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if (!keypairs) {
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keypairs = qlist_new();
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}
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qlist_append_str(keypairs, name);
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qlist_append_str(keypairs, value);
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}
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}
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if (keypairs) {
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qdict_put(options, "=keyvalue-pairs",
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qstring_from_gstring(qobject_to_json(QOBJECT(keypairs))));
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}
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done:
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g_free(buf);
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qobject_unref(keypairs);
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return;
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}
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static int qemu_rbd_set_auth(rados_t cluster, BlockdevOptionsRbd *opts,
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Error **errp)
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{
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char *key, *acr;
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int r;
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GString *accu;
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RbdAuthModeList *auth;
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if (opts->key_secret) {
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key = qcrypto_secret_lookup_as_base64(opts->key_secret, errp);
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if (!key) {
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return -EIO;
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}
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r = rados_conf_set(cluster, "key", key);
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g_free(key);
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if (r < 0) {
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error_setg_errno(errp, -r, "Could not set 'key'");
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return r;
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}
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}
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if (opts->has_auth_client_required) {
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accu = g_string_new("");
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for (auth = opts->auth_client_required; auth; auth = auth->next) {
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if (accu->str[0]) {
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g_string_append_c(accu, ';');
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}
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g_string_append(accu, RbdAuthMode_str(auth->value));
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}
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acr = g_string_free(accu, FALSE);
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r = rados_conf_set(cluster, "auth_client_required", acr);
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g_free(acr);
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if (r < 0) {
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error_setg_errno(errp, -r,
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"Could not set 'auth_client_required'");
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return r;
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}
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}
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return 0;
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}
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static int qemu_rbd_set_keypairs(rados_t cluster, const char *keypairs_json,
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Error **errp)
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{
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QList *keypairs;
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QString *name;
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QString *value;
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const char *key;
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size_t remaining;
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int ret = 0;
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if (!keypairs_json) {
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return ret;
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}
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keypairs = qobject_to(QList,
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qobject_from_json(keypairs_json, &error_abort));
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remaining = qlist_size(keypairs) / 2;
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assert(remaining);
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while (remaining--) {
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name = qobject_to(QString, qlist_pop(keypairs));
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value = qobject_to(QString, qlist_pop(keypairs));
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assert(name && value);
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key = qstring_get_str(name);
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ret = rados_conf_set(cluster, key, qstring_get_str(value));
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qobject_unref(value);
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if (ret < 0) {
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error_setg_errno(errp, -ret, "invalid conf option %s", key);
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qobject_unref(name);
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ret = -EINVAL;
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break;
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}
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qobject_unref(name);
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}
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qobject_unref(keypairs);
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return ret;
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}
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#ifdef LIBRBD_SUPPORTS_ENCRYPTION
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static int qemu_rbd_convert_luks_options(
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RbdEncryptionOptionsLUKSBase *luks_opts,
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char **passphrase,
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size_t *passphrase_len,
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Error **errp)
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{
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return qcrypto_secret_lookup(luks_opts->key_secret, (uint8_t **)passphrase,
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passphrase_len, errp);
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}
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static int qemu_rbd_convert_luks_create_options(
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RbdEncryptionCreateOptionsLUKSBase *luks_opts,
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rbd_encryption_algorithm_t *alg,
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char **passphrase,
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size_t *passphrase_len,
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Error **errp)
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{
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int r = 0;
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r = qemu_rbd_convert_luks_options(
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qapi_RbdEncryptionCreateOptionsLUKSBase_base(luks_opts),
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passphrase, passphrase_len, errp);
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if (r < 0) {
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return r;
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}
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if (luks_opts->has_cipher_alg) {
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switch (luks_opts->cipher_alg) {
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case QCRYPTO_CIPHER_ALG_AES_128: {
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*alg = RBD_ENCRYPTION_ALGORITHM_AES128;
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break;
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}
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case QCRYPTO_CIPHER_ALG_AES_256: {
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*alg = RBD_ENCRYPTION_ALGORITHM_AES256;
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break;
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}
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default: {
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r = -ENOTSUP;
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error_setg_errno(errp, -r, "unknown encryption algorithm: %u",
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luks_opts->cipher_alg);
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return r;
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}
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}
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} else {
|
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/* default alg */
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*alg = RBD_ENCRYPTION_ALGORITHM_AES256;
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}
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return 0;
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}
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static int qemu_rbd_encryption_format(rbd_image_t image,
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RbdEncryptionCreateOptions *encrypt,
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Error **errp)
|
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{
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int r = 0;
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g_autofree char *passphrase = NULL;
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size_t passphrase_len;
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rbd_encryption_format_t format;
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rbd_encryption_options_t opts;
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rbd_encryption_luks1_format_options_t luks_opts;
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rbd_encryption_luks2_format_options_t luks2_opts;
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size_t opts_size;
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uint64_t raw_size, effective_size;
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r = rbd_get_size(image, &raw_size);
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if (r < 0) {
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error_setg_errno(errp, -r, "cannot get raw image size");
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return r;
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}
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|
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switch (encrypt->format) {
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case RBD_IMAGE_ENCRYPTION_FORMAT_LUKS: {
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memset(&luks_opts, 0, sizeof(luks_opts));
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format = RBD_ENCRYPTION_FORMAT_LUKS1;
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opts = &luks_opts;
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opts_size = sizeof(luks_opts);
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r = qemu_rbd_convert_luks_create_options(
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qapi_RbdEncryptionCreateOptionsLUKS_base(&encrypt->u.luks),
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&luks_opts.alg, &passphrase, &passphrase_len, errp);
|
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if (r < 0) {
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return r;
|
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}
|
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luks_opts.passphrase = passphrase;
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luks_opts.passphrase_size = passphrase_len;
|
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break;
|
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}
|
|
case RBD_IMAGE_ENCRYPTION_FORMAT_LUKS2: {
|
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memset(&luks2_opts, 0, sizeof(luks2_opts));
|
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format = RBD_ENCRYPTION_FORMAT_LUKS2;
|
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opts = &luks2_opts;
|
|
opts_size = sizeof(luks2_opts);
|
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r = qemu_rbd_convert_luks_create_options(
|
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qapi_RbdEncryptionCreateOptionsLUKS2_base(
|
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&encrypt->u.luks2),
|
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&luks2_opts.alg, &passphrase, &passphrase_len, errp);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
luks2_opts.passphrase = passphrase;
|
|
luks2_opts.passphrase_size = passphrase_len;
|
|
break;
|
|
}
|
|
default: {
|
|
r = -ENOTSUP;
|
|
error_setg_errno(
|
|
errp, -r, "unknown image encryption format: %u",
|
|
encrypt->format);
|
|
return r;
|
|
}
|
|
}
|
|
|
|
r = rbd_encryption_format(image, format, opts, opts_size);
|
|
if (r < 0) {
|
|
error_setg_errno(errp, -r, "encryption format fail");
|
|
return r;
|
|
}
|
|
|
|
r = rbd_get_size(image, &effective_size);
|
|
if (r < 0) {
|
|
error_setg_errno(errp, -r, "cannot get effective image size");
|
|
return r;
|
|
}
|
|
|
|
r = rbd_resize(image, raw_size + (raw_size - effective_size));
|
|
if (r < 0) {
|
|
error_setg_errno(errp, -r, "cannot resize image after format");
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int qemu_rbd_encryption_load(rbd_image_t image,
|
|
RbdEncryptionOptions *encrypt,
|
|
Error **errp)
|
|
{
|
|
int r = 0;
|
|
g_autofree char *passphrase = NULL;
|
|
size_t passphrase_len;
|
|
rbd_encryption_luks1_format_options_t luks_opts;
|
|
rbd_encryption_luks2_format_options_t luks2_opts;
|
|
rbd_encryption_format_t format;
|
|
rbd_encryption_options_t opts;
|
|
size_t opts_size;
|
|
|
|
switch (encrypt->format) {
|
|
case RBD_IMAGE_ENCRYPTION_FORMAT_LUKS: {
|
|
memset(&luks_opts, 0, sizeof(luks_opts));
|
|
format = RBD_ENCRYPTION_FORMAT_LUKS1;
|
|
opts = &luks_opts;
|
|
opts_size = sizeof(luks_opts);
|
|
r = qemu_rbd_convert_luks_options(
|
|
qapi_RbdEncryptionOptionsLUKS_base(&encrypt->u.luks),
|
|
&passphrase, &passphrase_len, errp);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
luks_opts.passphrase = passphrase;
|
|
luks_opts.passphrase_size = passphrase_len;
|
|
break;
|
|
}
|
|
case RBD_IMAGE_ENCRYPTION_FORMAT_LUKS2: {
|
|
memset(&luks2_opts, 0, sizeof(luks2_opts));
|
|
format = RBD_ENCRYPTION_FORMAT_LUKS2;
|
|
opts = &luks2_opts;
|
|
opts_size = sizeof(luks2_opts);
|
|
r = qemu_rbd_convert_luks_options(
|
|
qapi_RbdEncryptionOptionsLUKS2_base(&encrypt->u.luks2),
|
|
&passphrase, &passphrase_len, errp);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
luks2_opts.passphrase = passphrase;
|
|
luks2_opts.passphrase_size = passphrase_len;
|
|
break;
|
|
}
|
|
default: {
|
|
r = -ENOTSUP;
|
|
error_setg_errno(
|
|
errp, -r, "unknown image encryption format: %u",
|
|
encrypt->format);
|
|
return r;
|
|
}
|
|
}
|
|
|
|
r = rbd_encryption_load(image, format, opts, opts_size);
|
|
if (r < 0) {
|
|
error_setg_errno(errp, -r, "encryption load fail");
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/* 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)
|
|
{
|
|
BlockdevCreateOptionsRbd *opts = &options->u.rbd;
|
|
rados_t cluster;
|
|
rados_ioctx_t io_ctx;
|
|
int obj_order = 0;
|
|
int ret;
|
|
|
|
assert(options->driver == BLOCKDEV_DRIVER_RBD);
|
|
if (opts->location->snapshot) {
|
|
error_setg(errp, "Can't use snapshot name for image creation");
|
|
return -EINVAL;
|
|
}
|
|
|
|
#ifndef LIBRBD_SUPPORTS_ENCRYPTION
|
|
if (opts->encrypt) {
|
|
error_setg(errp, "RBD library does not support image encryption");
|
|
return -ENOTSUP;
|
|
}
|
|
#endif
|
|
|
|
if (opts->has_cluster_size) {
|
|
int64_t objsize = opts->cluster_size;
|
|
if ((objsize - 1) & objsize) { /* not a power of 2? */
|
|
error_setg(errp, "obj size needs to be power of 2");
|
|
return -EINVAL;
|
|
}
|
|
if (objsize < 4096) {
|
|
error_setg(errp, "obj size too small");
|
|
return -EINVAL;
|
|
}
|
|
obj_order = ctz32(objsize);
|
|
}
|
|
|
|
ret = qemu_rbd_connect(&cluster, &io_ctx, opts->location, false, keypairs,
|
|
password_secret, errp);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
ret = rbd_create(io_ctx, opts->location->image, opts->size, &obj_order);
|
|
if (ret < 0) {
|
|
error_setg_errno(errp, -ret, "error rbd create");
|
|
goto out;
|
|
}
|
|
|
|
#ifdef LIBRBD_SUPPORTS_ENCRYPTION
|
|
if (opts->encrypt) {
|
|
rbd_image_t image;
|
|
|
|
ret = rbd_open(io_ctx, opts->location->image, &image, NULL);
|
|
if (ret < 0) {
|
|
error_setg_errno(errp, -ret,
|
|
"error opening image '%s' for encryption format",
|
|
opts->location->image);
|
|
goto out;
|
|
}
|
|
|
|
ret = qemu_rbd_encryption_format(image, opts->encrypt, errp);
|
|
rbd_close(image);
|
|
if (ret < 0) {
|
|
/* encryption format fail, try removing the image */
|
|
rbd_remove(io_ctx, opts->location->image);
|
|
goto out;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
ret = 0;
|
|
out:
|
|
rados_ioctx_destroy(io_ctx);
|
|
rados_shutdown(cluster);
|
|
return ret;
|
|
}
|
|
|
|
static int qemu_rbd_co_create(BlockdevCreateOptions *options, Error **errp)
|
|
{
|
|
return qemu_rbd_do_create(options, NULL, NULL, errp);
|
|
}
|
|
|
|
static int qemu_rbd_extract_encryption_create_options(
|
|
QemuOpts *opts,
|
|
RbdEncryptionCreateOptions **spec,
|
|
Error **errp)
|
|
{
|
|
QDict *opts_qdict;
|
|
QDict *encrypt_qdict;
|
|
Visitor *v;
|
|
int ret = 0;
|
|
|
|
opts_qdict = qemu_opts_to_qdict(opts, NULL);
|
|
qdict_extract_subqdict(opts_qdict, &encrypt_qdict, "encrypt.");
|
|
qobject_unref(opts_qdict);
|
|
if (!qdict_size(encrypt_qdict)) {
|
|
*spec = NULL;
|
|
goto exit;
|
|
}
|
|
|
|
/* Convert options into a QAPI object */
|
|
v = qobject_input_visitor_new_flat_confused(encrypt_qdict, errp);
|
|
if (!v) {
|
|
ret = -EINVAL;
|
|
goto exit;
|
|
}
|
|
|
|
visit_type_RbdEncryptionCreateOptions(v, NULL, spec, errp);
|
|
visit_free(v);
|
|
if (!*spec) {
|
|
ret = -EINVAL;
|
|
goto exit;
|
|
}
|
|
|
|
exit:
|
|
qobject_unref(encrypt_qdict);
|
|
return ret;
|
|
}
|
|
|
|
static int coroutine_fn qemu_rbd_co_create_opts(BlockDriver *drv,
|
|
const char *filename,
|
|
QemuOpts *opts,
|
|
Error **errp)
|
|
{
|
|
BlockdevCreateOptions *create_options;
|
|
BlockdevCreateOptionsRbd *rbd_opts;
|
|
BlockdevOptionsRbd *loc;
|
|
RbdEncryptionCreateOptions *encrypt = NULL;
|
|
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;
|
|
}
|
|
|
|
ret = qemu_rbd_extract_encryption_create_options(opts, &encrypt, errp);
|
|
if (ret < 0) {
|
|
goto exit;
|
|
}
|
|
rbd_opts->encrypt = encrypt;
|
|
|
|
/*
|
|
* 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->user = g_strdup(qdict_get_try_str(options, "user"));
|
|
loc->q_namespace = g_strdup(qdict_get_try_str(options, "namespace"));
|
|
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 char *qemu_rbd_mon_host(BlockdevOptionsRbd *opts, Error **errp)
|
|
{
|
|
const char **vals;
|
|
const char *host, *port;
|
|
char *rados_str;
|
|
InetSocketAddressBaseList *p;
|
|
int i, cnt;
|
|
|
|
if (!opts->has_server) {
|
|
return NULL;
|
|
}
|
|
|
|
for (cnt = 0, p = opts->server; p; p = p->next) {
|
|
cnt++;
|
|
}
|
|
|
|
vals = g_new(const char *, cnt + 1);
|
|
|
|
for (i = 0, p = opts->server; p; p = p->next, i++) {
|
|
host = p->value->host;
|
|
port = p->value->port;
|
|
|
|
if (strchr(host, ':')) {
|
|
vals[i] = g_strdup_printf("[%s]:%s", host, port);
|
|
} else {
|
|
vals[i] = g_strdup_printf("%s:%s", host, port);
|
|
}
|
|
}
|
|
vals[i] = NULL;
|
|
|
|
rados_str = i ? g_strjoinv(";", (char **)vals) : NULL;
|
|
g_strfreev((char **)vals);
|
|
return rados_str;
|
|
}
|
|
|
|
static int qemu_rbd_connect(rados_t *cluster, rados_ioctx_t *io_ctx,
|
|
BlockdevOptionsRbd *opts, bool cache,
|
|
const char *keypairs, const char *secretid,
|
|
Error **errp)
|
|
{
|
|
char *mon_host = NULL;
|
|
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);
|
|
}
|
|
|
|
mon_host = qemu_rbd_mon_host(opts, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
r = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
r = rados_create(cluster, opts->user);
|
|
if (r < 0) {
|
|
error_setg_errno(errp, -r, "error initializing");
|
|
goto out;
|
|
}
|
|
|
|
/* try default location when conf=NULL, but ignore failure */
|
|
r = rados_conf_read_file(*cluster, opts->conf);
|
|
if (opts->conf && r < 0) {
|
|
error_setg_errno(errp, -r, "error reading conf file %s", opts->conf);
|
|
goto failed_shutdown;
|
|
}
|
|
|
|
r = qemu_rbd_set_keypairs(*cluster, keypairs, errp);
|
|
if (r < 0) {
|
|
goto failed_shutdown;
|
|
}
|
|
|
|
if (mon_host) {
|
|
r = rados_conf_set(*cluster, "mon_host", mon_host);
|
|
if (r < 0) {
|
|
goto failed_shutdown;
|
|
}
|
|
}
|
|
|
|
r = qemu_rbd_set_auth(*cluster, opts, errp);
|
|
if (r < 0) {
|
|
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 (cache) {
|
|
rados_conf_set(*cluster, "rbd_cache", "true");
|
|
} else {
|
|
rados_conf_set(*cluster, "rbd_cache", "false");
|
|
}
|
|
|
|
r = rados_connect(*cluster);
|
|
if (r < 0) {
|
|
error_setg_errno(errp, -r, "error connecting");
|
|
goto failed_shutdown;
|
|
}
|
|
|
|
r = rados_ioctx_create(*cluster, opts->pool, io_ctx);
|
|
if (r < 0) {
|
|
error_setg_errno(errp, -r, "error opening pool %s", opts->pool);
|
|
goto failed_shutdown;
|
|
}
|
|
|
|
#ifdef HAVE_RBD_NAMESPACE_EXISTS
|
|
if (opts->q_namespace && strlen(opts->q_namespace) > 0) {
|
|
bool exists;
|
|
|
|
r = rbd_namespace_exists(*io_ctx, opts->q_namespace, &exists);
|
|
if (r < 0) {
|
|
error_setg_errno(errp, -r, "error checking namespace");
|
|
goto failed_ioctx_destroy;
|
|
}
|
|
|
|
if (!exists) {
|
|
error_setg(errp, "namespace '%s' does not exist",
|
|
opts->q_namespace);
|
|
r = -ENOENT;
|
|
goto failed_ioctx_destroy;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Set the namespace after opening the io context on the pool,
|
|
* if nspace == NULL or if nspace == "", it is just as we did nothing
|
|
*/
|
|
rados_ioctx_set_namespace(*io_ctx, opts->q_namespace);
|
|
|
|
r = 0;
|
|
goto out;
|
|
|
|
#ifdef HAVE_RBD_NAMESPACE_EXISTS
|
|
failed_ioctx_destroy:
|
|
rados_ioctx_destroy(*io_ctx);
|
|
#endif
|
|
failed_shutdown:
|
|
rados_shutdown(*cluster);
|
|
out:
|
|
g_free(mon_host);
|
|
return r;
|
|
}
|
|
|
|
static int qemu_rbd_convert_options(QDict *options, BlockdevOptionsRbd **opts,
|
|
Error **errp)
|
|
{
|
|
Visitor *v;
|
|
|
|
/* 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, errp);
|
|
visit_free(v);
|
|
if (!opts) {
|
|
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;
|
|
const QDictEntry *e;
|
|
Error *local_err = NULL;
|
|
char *keypairs, *secretid;
|
|
rbd_image_info_t info;
|
|
int r;
|
|
|
|
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");
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/* 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");
|
|
}
|
|
|
|
/* 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 (opts->encrypt) {
|
|
#ifdef LIBRBD_SUPPORTS_ENCRYPTION
|
|
r = qemu_rbd_encryption_load(s->image, opts->encrypt, errp);
|
|
if (r < 0) {
|
|
goto failed_post_open;
|
|
}
|
|
#else
|
|
r = -ENOTSUP;
|
|
error_setg(errp, "RBD library does not support image encryption");
|
|
goto failed_post_open;
|
|
#endif
|
|
}
|
|
|
|
r = rbd_stat(s->image, &info, sizeof(info));
|
|
if (r < 0) {
|
|
error_setg_errno(errp, -r, "error getting image info from %s",
|
|
s->image_name);
|
|
goto failed_post_open;
|
|
}
|
|
s->image_size = info.size;
|
|
s->object_size = info.obj_size;
|
|
|
|
/* If we are using an rbd snapshot, we must be r/o, otherwise
|
|
* leave as-is */
|
|
if (s->snap != NULL) {
|
|
r = bdrv_apply_auto_read_only(bs, "rbd snapshots are read-only", errp);
|
|
if (r < 0) {
|
|
goto failed_post_open;
|
|
}
|
|
}
|
|
|
|
#ifdef LIBRBD_SUPPORTS_WRITE_ZEROES
|
|
bs->supported_zero_flags = BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK;
|
|
#endif
|
|
|
|
/* When extending regular files, we get zeros from the OS */
|
|
bs->supported_truncate_flags = BDRV_REQ_ZERO_WRITE;
|
|
|
|
r = 0;
|
|
goto out;
|
|
|
|
failed_post_open:
|
|
rbd_close(s->image);
|
|
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;
|
|
}
|
|
|
|
|
|
/* Since RBD is currently always opened R/W via the API,
|
|
* we just need to check if we are using a snapshot or not, in
|
|
* order to determine if we will allow it to be R/W */
|
|
static int qemu_rbd_reopen_prepare(BDRVReopenState *state,
|
|
BlockReopenQueue *queue, Error **errp)
|
|
{
|
|
BDRVRBDState *s = state->bs->opaque;
|
|
int ret = 0;
|
|
|
|
if (s->snap && state->flags & BDRV_O_RDWR) {
|
|
error_setg(errp,
|
|
"Cannot change node '%s' to r/w when using RBD snapshot",
|
|
bdrv_get_device_or_node_name(state->bs));
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void qemu_rbd_close(BlockDriverState *bs)
|
|
{
|
|
BDRVRBDState *s = bs->opaque;
|
|
|
|
rbd_close(s->image);
|
|
rados_ioctx_destroy(s->io_ctx);
|
|
g_free(s->snap);
|
|
g_free(s->image_name);
|
|
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 void qemu_rbd_finish_bh(void *opaque)
|
|
{
|
|
RBDTask *task = opaque;
|
|
task->complete = true;
|
|
aio_co_wake(task->co);
|
|
}
|
|
|
|
/*
|
|
* This is the completion callback function for all rbd aio calls
|
|
* started from qemu_rbd_start_co().
|
|
*
|
|
* Note: this function is being called from a non qemu thread so
|
|
* we need to be careful about what we do here. Generally we only
|
|
* schedule a BH, and do the rest of the io completion handling
|
|
* from qemu_rbd_finish_bh() which runs in a qemu context.
|
|
*/
|
|
static void qemu_rbd_completion_cb(rbd_completion_t c, RBDTask *task)
|
|
{
|
|
task->ret = rbd_aio_get_return_value(c);
|
|
rbd_aio_release(c);
|
|
aio_bh_schedule_oneshot(bdrv_get_aio_context(task->bs),
|
|
qemu_rbd_finish_bh, task);
|
|
}
|
|
|
|
static int coroutine_fn qemu_rbd_start_co(BlockDriverState *bs,
|
|
uint64_t offset,
|
|
uint64_t bytes,
|
|
QEMUIOVector *qiov,
|
|
int flags,
|
|
RBDAIOCmd cmd)
|
|
{
|
|
BDRVRBDState *s = bs->opaque;
|
|
RBDTask task = { .bs = bs, .co = qemu_coroutine_self() };
|
|
rbd_completion_t c;
|
|
int r;
|
|
|
|
assert(!qiov || qiov->size == bytes);
|
|
|
|
if (cmd == RBD_AIO_WRITE || cmd == RBD_AIO_WRITE_ZEROES) {
|
|
/*
|
|
* 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 (offset + bytes > s->image_size) {
|
|
int r = qemu_rbd_resize(bs, offset + bytes);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
}
|
|
}
|
|
|
|
r = rbd_aio_create_completion(&task,
|
|
(rbd_callback_t) qemu_rbd_completion_cb, &c);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
|
|
switch (cmd) {
|
|
case RBD_AIO_READ:
|
|
r = rbd_aio_readv(s->image, qiov->iov, qiov->niov, offset, c);
|
|
break;
|
|
case RBD_AIO_WRITE:
|
|
r = rbd_aio_writev(s->image, qiov->iov, qiov->niov, offset, c);
|
|
break;
|
|
case RBD_AIO_DISCARD:
|
|
r = rbd_aio_discard(s->image, offset, bytes, c);
|
|
break;
|
|
case RBD_AIO_FLUSH:
|
|
r = rbd_aio_flush(s->image, c);
|
|
break;
|
|
#ifdef LIBRBD_SUPPORTS_WRITE_ZEROES
|
|
case RBD_AIO_WRITE_ZEROES: {
|
|
int zero_flags = 0;
|
|
#ifdef RBD_WRITE_ZEROES_FLAG_THICK_PROVISION
|
|
if (!(flags & BDRV_REQ_MAY_UNMAP)) {
|
|
zero_flags = RBD_WRITE_ZEROES_FLAG_THICK_PROVISION;
|
|
}
|
|
#endif
|
|
r = rbd_aio_write_zeroes(s->image, offset, bytes, c, zero_flags, 0);
|
|
break;
|
|
}
|
|
#endif
|
|
default:
|
|
r = -EINVAL;
|
|
}
|
|
|
|
if (r < 0) {
|
|
error_report("rbd request failed early: cmd %d offset %" PRIu64
|
|
" bytes %" PRIu64 " flags %d r %d (%s)", cmd, offset,
|
|
bytes, flags, r, strerror(-r));
|
|
rbd_aio_release(c);
|
|
return r;
|
|
}
|
|
|
|
while (!task.complete) {
|
|
qemu_coroutine_yield();
|
|
}
|
|
|
|
if (task.ret < 0) {
|
|
error_report("rbd request failed: cmd %d offset %" PRIu64 " bytes %"
|
|
PRIu64 " flags %d task.ret %" PRIi64 " (%s)", cmd, offset,
|
|
bytes, flags, task.ret, strerror(-task.ret));
|
|
return task.ret;
|
|
}
|
|
|
|
/* zero pad short reads */
|
|
if (cmd == RBD_AIO_READ && task.ret < qiov->size) {
|
|
qemu_iovec_memset(qiov, task.ret, 0, qiov->size - task.ret);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
coroutine_fn qemu_rbd_co_preadv(BlockDriverState *bs, int64_t offset,
|
|
int64_t bytes, QEMUIOVector *qiov,
|
|
BdrvRequestFlags flags)
|
|
{
|
|
return qemu_rbd_start_co(bs, offset, bytes, qiov, flags, RBD_AIO_READ);
|
|
}
|
|
|
|
static int
|
|
coroutine_fn qemu_rbd_co_pwritev(BlockDriverState *bs, int64_t offset,
|
|
int64_t bytes, QEMUIOVector *qiov,
|
|
BdrvRequestFlags flags)
|
|
{
|
|
return qemu_rbd_start_co(bs, offset, bytes, qiov, flags, RBD_AIO_WRITE);
|
|
}
|
|
|
|
static int coroutine_fn qemu_rbd_co_flush(BlockDriverState *bs)
|
|
{
|
|
return qemu_rbd_start_co(bs, 0, 0, NULL, 0, RBD_AIO_FLUSH);
|
|
}
|
|
|
|
static int coroutine_fn qemu_rbd_co_pdiscard(BlockDriverState *bs,
|
|
int64_t offset, int64_t bytes)
|
|
{
|
|
return qemu_rbd_start_co(bs, offset, bytes, NULL, 0, RBD_AIO_DISCARD);
|
|
}
|
|
|
|
#ifdef LIBRBD_SUPPORTS_WRITE_ZEROES
|
|
static int
|
|
coroutine_fn qemu_rbd_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
|
|
int64_t bytes, BdrvRequestFlags flags)
|
|
{
|
|
return qemu_rbd_start_co(bs, offset, bytes, NULL, flags,
|
|
RBD_AIO_WRITE_ZEROES);
|
|
}
|
|
#endif
|
|
|
|
static int qemu_rbd_getinfo(BlockDriverState *bs, BlockDriverInfo *bdi)
|
|
{
|
|
BDRVRBDState *s = bs->opaque;
|
|
bdi->cluster_size = s->object_size;
|
|
return 0;
|
|
}
|
|
|
|
static ImageInfoSpecific *qemu_rbd_get_specific_info(BlockDriverState *bs,
|
|
Error **errp)
|
|
{
|
|
BDRVRBDState *s = bs->opaque;
|
|
ImageInfoSpecific *spec_info;
|
|
char buf[RBD_ENCRYPTION_LUKS_HEADER_VERIFICATION_LEN] = {0};
|
|
int r;
|
|
|
|
if (s->image_size >= RBD_ENCRYPTION_LUKS_HEADER_VERIFICATION_LEN) {
|
|
r = rbd_read(s->image, 0,
|
|
RBD_ENCRYPTION_LUKS_HEADER_VERIFICATION_LEN, buf);
|
|
if (r < 0) {
|
|
error_setg_errno(errp, -r, "cannot read image start for probe");
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
spec_info = g_new(ImageInfoSpecific, 1);
|
|
*spec_info = (ImageInfoSpecific){
|
|
.type = IMAGE_INFO_SPECIFIC_KIND_RBD,
|
|
.u.rbd.data = g_new0(ImageInfoSpecificRbd, 1),
|
|
};
|
|
|
|
if (memcmp(buf, rbd_luks_header_verification,
|
|
RBD_ENCRYPTION_LUKS_HEADER_VERIFICATION_LEN) == 0) {
|
|
spec_info->u.rbd.data->encryption_format =
|
|
RBD_IMAGE_ENCRYPTION_FORMAT_LUKS;
|
|
spec_info->u.rbd.data->has_encryption_format = true;
|
|
} else if (memcmp(buf, rbd_luks2_header_verification,
|
|
RBD_ENCRYPTION_LUKS_HEADER_VERIFICATION_LEN) == 0) {
|
|
spec_info->u.rbd.data->encryption_format =
|
|
RBD_IMAGE_ENCRYPTION_FORMAT_LUKS2;
|
|
spec_info->u.rbd.data->has_encryption_format = true;
|
|
} else {
|
|
spec_info->u.rbd.data->has_encryption_format = false;
|
|
}
|
|
|
|
return spec_info;
|
|
}
|
|
|
|
/*
|
|
* rbd_diff_iterate2 allows to interrupt the exection by returning a negative
|
|
* value in the callback routine. Choose a value that does not conflict with
|
|
* an existing exitcode and return it if we want to prematurely stop the
|
|
* execution because we detected a change in the allocation status.
|
|
*/
|
|
#define QEMU_RBD_EXIT_DIFF_ITERATE2 -9000
|
|
|
|
static int qemu_rbd_diff_iterate_cb(uint64_t offs, size_t len,
|
|
int exists, void *opaque)
|
|
{
|
|
RBDDiffIterateReq *req = opaque;
|
|
|
|
assert(req->offs + req->bytes <= offs);
|
|
|
|
/* treat a hole like an unallocated area and bail out */
|
|
if (!exists) {
|
|
return 0;
|
|
}
|
|
|
|
if (!req->exists && offs > req->offs) {
|
|
/*
|
|
* we started in an unallocated area and hit the first allocated
|
|
* block. req->bytes must be set to the length of the unallocated area
|
|
* before the allocated area. stop further processing.
|
|
*/
|
|
req->bytes = offs - req->offs;
|
|
return QEMU_RBD_EXIT_DIFF_ITERATE2;
|
|
}
|
|
|
|
if (req->exists && offs > req->offs + req->bytes) {
|
|
/*
|
|
* we started in an allocated area and jumped over an unallocated area,
|
|
* req->bytes contains the length of the allocated area before the
|
|
* unallocated area. stop further processing.
|
|
*/
|
|
return QEMU_RBD_EXIT_DIFF_ITERATE2;
|
|
}
|
|
|
|
req->bytes += len;
|
|
req->exists = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int coroutine_fn qemu_rbd_co_block_status(BlockDriverState *bs,
|
|
bool want_zero, int64_t offset,
|
|
int64_t bytes, int64_t *pnum,
|
|
int64_t *map,
|
|
BlockDriverState **file)
|
|
{
|
|
BDRVRBDState *s = bs->opaque;
|
|
int status, r;
|
|
RBDDiffIterateReq req = { .offs = offset };
|
|
uint64_t features, flags;
|
|
uint64_t head = 0;
|
|
|
|
assert(offset + bytes <= s->image_size);
|
|
|
|
/* default to all sectors allocated */
|
|
status = BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID;
|
|
*map = offset;
|
|
*file = bs;
|
|
*pnum = bytes;
|
|
|
|
/* check if RBD image supports fast-diff */
|
|
r = rbd_get_features(s->image, &features);
|
|
if (r < 0) {
|
|
return status;
|
|
}
|
|
if (!(features & RBD_FEATURE_FAST_DIFF)) {
|
|
return status;
|
|
}
|
|
|
|
/* check if RBD fast-diff result is valid */
|
|
r = rbd_get_flags(s->image, &flags);
|
|
if (r < 0) {
|
|
return status;
|
|
}
|
|
if (flags & RBD_FLAG_FAST_DIFF_INVALID) {
|
|
return status;
|
|
}
|
|
|
|
#if LIBRBD_VERSION_CODE < LIBRBD_VERSION(1, 17, 0)
|
|
/*
|
|
* librbd had a bug until early 2022 that affected all versions of ceph that
|
|
* supported fast-diff. This bug results in reporting of incorrect offsets
|
|
* if the offset parameter to rbd_diff_iterate2 is not object aligned.
|
|
* Work around this bug by rounding down the offset to object boundaries.
|
|
* This is OK because we call rbd_diff_iterate2 with whole_object = true.
|
|
* However, this workaround only works for non cloned images with default
|
|
* striping.
|
|
*
|
|
* See: https://tracker.ceph.com/issues/53784
|
|
*/
|
|
|
|
/* check if RBD image has non-default striping enabled */
|
|
if (features & RBD_FEATURE_STRIPINGV2) {
|
|
return status;
|
|
}
|
|
|
|
#pragma GCC diagnostic push
|
|
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
|
|
/*
|
|
* check if RBD image is a clone (= has a parent).
|
|
*
|
|
* rbd_get_parent_info is deprecated from Nautilus onwards, but the
|
|
* replacement rbd_get_parent is not present in Luminous and Mimic.
|
|
*/
|
|
if (rbd_get_parent_info(s->image, NULL, 0, NULL, 0, NULL, 0) != -ENOENT) {
|
|
return status;
|
|
}
|
|
#pragma GCC diagnostic pop
|
|
|
|
head = req.offs & (s->object_size - 1);
|
|
req.offs -= head;
|
|
bytes += head;
|
|
#endif
|
|
|
|
r = rbd_diff_iterate2(s->image, NULL, req.offs, bytes, true, true,
|
|
qemu_rbd_diff_iterate_cb, &req);
|
|
if (r < 0 && r != QEMU_RBD_EXIT_DIFF_ITERATE2) {
|
|
return status;
|
|
}
|
|
assert(req.bytes <= bytes);
|
|
if (!req.exists) {
|
|
if (r == 0) {
|
|
/*
|
|
* rbd_diff_iterate2 does not invoke callbacks for unallocated
|
|
* areas. This here catches the case where no callback was
|
|
* invoked at all (req.bytes == 0).
|
|
*/
|
|
assert(req.bytes == 0);
|
|
req.bytes = bytes;
|
|
}
|
|
status = BDRV_BLOCK_ZERO | BDRV_BLOCK_OFFSET_VALID;
|
|
}
|
|
|
|
assert(req.bytes > head);
|
|
*pnum = req.bytes - head;
|
|
return status;
|
|
}
|
|
|
|
static int64_t coroutine_fn qemu_rbd_co_getlength(BlockDriverState *bs)
|
|
{
|
|
BDRVRBDState *s = bs->opaque;
|
|
int r;
|
|
|
|
r = rbd_get_size(s->image, &s->image_size);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
|
|
return s->image_size;
|
|
}
|
|
|
|
static int coroutine_fn qemu_rbd_co_truncate(BlockDriverState *bs,
|
|
int64_t offset,
|
|
bool exact,
|
|
PreallocMode prealloc,
|
|
BdrvRequestFlags flags,
|
|
Error **errp)
|
|
{
|
|
int r;
|
|
|
|
if (prealloc != PREALLOC_MODE_OFF) {
|
|
error_setg(errp, "Unsupported preallocation mode '%s'",
|
|
PreallocMode_str(prealloc));
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
r = qemu_rbd_resize(bs, offset);
|
|
if (r < 0) {
|
|
error_setg_errno(errp, -r, "Failed to resize file");
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int qemu_rbd_snap_create(BlockDriverState *bs,
|
|
QEMUSnapshotInfo *sn_info)
|
|
{
|
|
BDRVRBDState *s = bs->opaque;
|
|
int r;
|
|
|
|
if (sn_info->name[0] == '\0') {
|
|
return -EINVAL; /* we need a name for rbd snapshots */
|
|
}
|
|
|
|
/*
|
|
* rbd snapshots are using the name as the user controlled unique identifier
|
|
* we can't use the rbd snapid for that purpose, as it can't be set
|
|
*/
|
|
if (sn_info->id_str[0] != '\0' &&
|
|
strcmp(sn_info->id_str, sn_info->name) != 0) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (strlen(sn_info->name) >= sizeof(sn_info->id_str)) {
|
|
return -ERANGE;
|
|
}
|
|
|
|
r = rbd_snap_create(s->image, sn_info->name);
|
|
if (r < 0) {
|
|
error_report("failed to create snap: %s", strerror(-r));
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int qemu_rbd_snap_remove(BlockDriverState *bs,
|
|
const char *snapshot_id,
|
|
const char *snapshot_name,
|
|
Error **errp)
|
|
{
|
|
BDRVRBDState *s = bs->opaque;
|
|
int r;
|
|
|
|
if (!snapshot_name) {
|
|
error_setg(errp, "rbd need a valid snapshot name");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* If snapshot_id is specified, it must be equal to name, see
|
|
qemu_rbd_snap_list() */
|
|
if (snapshot_id && strcmp(snapshot_id, snapshot_name)) {
|
|
error_setg(errp,
|
|
"rbd do not support snapshot id, it should be NULL or "
|
|
"equal to snapshot name");
|
|
return -EINVAL;
|
|
}
|
|
|
|
r = rbd_snap_remove(s->image, snapshot_name);
|
|
if (r < 0) {
|
|
error_setg_errno(errp, -r, "Failed to remove the snapshot");
|
|
}
|
|
return r;
|
|
}
|
|
|
|
static int qemu_rbd_snap_rollback(BlockDriverState *bs,
|
|
const char *snapshot_name)
|
|
{
|
|
BDRVRBDState *s = bs->opaque;
|
|
|
|
return rbd_snap_rollback(s->image, snapshot_name);
|
|
}
|
|
|
|
static int qemu_rbd_snap_list(BlockDriverState *bs,
|
|
QEMUSnapshotInfo **psn_tab)
|
|
{
|
|
BDRVRBDState *s = bs->opaque;
|
|
QEMUSnapshotInfo *sn_info, *sn_tab = NULL;
|
|
int i, snap_count;
|
|
rbd_snap_info_t *snaps;
|
|
int max_snaps = RBD_MAX_SNAPS;
|
|
|
|
do {
|
|
snaps = g_new(rbd_snap_info_t, max_snaps);
|
|
snap_count = rbd_snap_list(s->image, snaps, &max_snaps);
|
|
if (snap_count <= 0) {
|
|
g_free(snaps);
|
|
}
|
|
} while (snap_count == -ERANGE);
|
|
|
|
if (snap_count <= 0) {
|
|
goto done;
|
|
}
|
|
|
|
sn_tab = g_new0(QEMUSnapshotInfo, snap_count);
|
|
|
|
for (i = 0; i < snap_count; i++) {
|
|
const char *snap_name = snaps[i].name;
|
|
|
|
sn_info = sn_tab + i;
|
|
pstrcpy(sn_info->id_str, sizeof(sn_info->id_str), snap_name);
|
|
pstrcpy(sn_info->name, sizeof(sn_info->name), snap_name);
|
|
|
|
sn_info->vm_state_size = snaps[i].size;
|
|
sn_info->date_sec = 0;
|
|
sn_info->date_nsec = 0;
|
|
sn_info->vm_clock_nsec = 0;
|
|
}
|
|
rbd_snap_list_end(snaps);
|
|
g_free(snaps);
|
|
|
|
done:
|
|
*psn_tab = sn_tab;
|
|
return snap_count;
|
|
}
|
|
|
|
static void coroutine_fn qemu_rbd_co_invalidate_cache(BlockDriverState *bs,
|
|
Error **errp)
|
|
{
|
|
BDRVRBDState *s = bs->opaque;
|
|
int r = rbd_invalidate_cache(s->image);
|
|
if (r < 0) {
|
|
error_setg_errno(errp, -r, "Failed to invalidate the cache");
|
|
}
|
|
}
|
|
|
|
static QemuOptsList qemu_rbd_create_opts = {
|
|
.name = "rbd-create-opts",
|
|
.head = QTAILQ_HEAD_INITIALIZER(qemu_rbd_create_opts.head),
|
|
.desc = {
|
|
{
|
|
.name = BLOCK_OPT_SIZE,
|
|
.type = QEMU_OPT_SIZE,
|
|
.help = "Virtual disk size"
|
|
},
|
|
{
|
|
.name = BLOCK_OPT_CLUSTER_SIZE,
|
|
.type = QEMU_OPT_SIZE,
|
|
.help = "RBD object size"
|
|
},
|
|
{
|
|
.name = "password-secret",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "ID of secret providing the password",
|
|
},
|
|
{
|
|
.name = "encrypt.format",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "Encrypt the image, format choices: 'luks', 'luks2'",
|
|
},
|
|
{
|
|
.name = "encrypt.cipher-alg",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "Name of encryption cipher algorithm"
|
|
" (allowed values: aes-128, aes-256)",
|
|
},
|
|
{
|
|
.name = "encrypt.key-secret",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "ID of secret providing LUKS passphrase",
|
|
},
|
|
{ /* end of list */ }
|
|
}
|
|
};
|
|
|
|
static const char *const qemu_rbd_strong_runtime_opts[] = {
|
|
"pool",
|
|
"namespace",
|
|
"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_file_open = qemu_rbd_open,
|
|
.bdrv_close = qemu_rbd_close,
|
|
.bdrv_reopen_prepare = qemu_rbd_reopen_prepare,
|
|
.bdrv_co_create = qemu_rbd_co_create,
|
|
.bdrv_co_create_opts = qemu_rbd_co_create_opts,
|
|
.bdrv_has_zero_init = bdrv_has_zero_init_1,
|
|
.bdrv_get_info = qemu_rbd_getinfo,
|
|
.bdrv_get_specific_info = qemu_rbd_get_specific_info,
|
|
.create_opts = &qemu_rbd_create_opts,
|
|
.bdrv_co_getlength = qemu_rbd_co_getlength,
|
|
.bdrv_co_truncate = qemu_rbd_co_truncate,
|
|
.protocol_name = "rbd",
|
|
|
|
.bdrv_co_preadv = qemu_rbd_co_preadv,
|
|
.bdrv_co_pwritev = qemu_rbd_co_pwritev,
|
|
.bdrv_co_flush_to_disk = qemu_rbd_co_flush,
|
|
.bdrv_co_pdiscard = qemu_rbd_co_pdiscard,
|
|
#ifdef LIBRBD_SUPPORTS_WRITE_ZEROES
|
|
.bdrv_co_pwrite_zeroes = qemu_rbd_co_pwrite_zeroes,
|
|
#endif
|
|
.bdrv_co_block_status = qemu_rbd_co_block_status,
|
|
|
|
.bdrv_snapshot_create = qemu_rbd_snap_create,
|
|
.bdrv_snapshot_delete = qemu_rbd_snap_remove,
|
|
.bdrv_snapshot_list = qemu_rbd_snap_list,
|
|
.bdrv_snapshot_goto = qemu_rbd_snap_rollback,
|
|
.bdrv_co_invalidate_cache = qemu_rbd_co_invalidate_cache,
|
|
|
|
.strong_runtime_opts = qemu_rbd_strong_runtime_opts,
|
|
};
|
|
|
|
static void bdrv_rbd_init(void)
|
|
{
|
|
bdrv_register(&bdrv_rbd);
|
|
}
|
|
|
|
block_init(bdrv_rbd_init);
|