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1 | /* | |
2 | * QEMU Block driver for RADOS (Ceph) | |
3 | * | |
4 | * Copyright (C) 2010-2011 Christian Brunner <chb@muc.de>, | |
5 | * Josh Durgin <josh.durgin@dreamhost.com> | |
6 | * | |
7 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
8 | * the COPYING file in the top-level directory. | |
9 | * | |
10 | * Contributions after 2012-01-13 are licensed under the terms of the | |
11 | * GNU GPL, version 2 or (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #include "qemu/osdep.h" | |
15 | ||
16 | #include <rbd/librbd.h> | |
17 | #include "qapi/error.h" | |
18 | #include "qemu/error-report.h" | |
19 | #include "qemu/module.h" | |
20 | #include "qemu/option.h" | |
21 | #include "block/block_int.h" | |
22 | #include "block/qdict.h" | |
23 | #include "crypto/secret.h" | |
24 | #include "qemu/cutils.h" | |
25 | #include "sysemu/replay.h" | |
26 | #include "qapi/qmp/qstring.h" | |
27 | #include "qapi/qmp/qdict.h" | |
28 | #include "qapi/qmp/qjson.h" | |
29 | #include "qapi/qmp/qlist.h" | |
30 | #include "qapi/qobject-input-visitor.h" | |
31 | #include "qapi/qapi-visit-block-core.h" | |
32 | ||
33 | /* | |
34 | * When specifying the image filename use: | |
35 | * | |
36 | * rbd:poolname/devicename[@snapshotname][:option1=value1[:option2=value2...]] | |
37 | * | |
38 | * poolname must be the name of an existing rados pool. | |
39 | * | |
40 | * devicename is the name of the rbd image. | |
41 | * | |
42 | * Each option given is used to configure rados, and may be any valid | |
43 | * Ceph option, "id", or "conf". | |
44 | * | |
45 | * The "id" option indicates what user we should authenticate as to | |
46 | * the Ceph cluster. If it is excluded we will use the Ceph default | |
47 | * (normally 'admin'). | |
48 | * | |
49 | * The "conf" option specifies a Ceph configuration file to read. If | |
50 | * it is not specified, we will read from the default Ceph locations | |
51 | * (e.g., /etc/ceph/ceph.conf). To avoid reading _any_ configuration | |
52 | * file, specify conf=/dev/null. | |
53 | * | |
54 | * Configuration values containing :, @, or = can be escaped with a | |
55 | * leading "\". | |
56 | */ | |
57 | ||
58 | /* rbd_aio_discard added in 0.1.2 */ | |
59 | #if LIBRBD_VERSION_CODE >= LIBRBD_VERSION(0, 1, 2) | |
60 | #define LIBRBD_SUPPORTS_DISCARD | |
61 | #else | |
62 | #undef LIBRBD_SUPPORTS_DISCARD | |
63 | #endif | |
64 | ||
65 | #define OBJ_MAX_SIZE (1UL << OBJ_DEFAULT_OBJ_ORDER) | |
66 | ||
67 | #define RBD_MAX_SNAPS 100 | |
68 | ||
69 | /* The LIBRBD_SUPPORTS_IOVEC is defined in librbd.h */ | |
70 | #ifdef LIBRBD_SUPPORTS_IOVEC | |
71 | #define LIBRBD_USE_IOVEC 1 | |
72 | #else | |
73 | #define LIBRBD_USE_IOVEC 0 | |
74 | #endif | |
75 | ||
76 | typedef enum { | |
77 | RBD_AIO_READ, | |
78 | RBD_AIO_WRITE, | |
79 | RBD_AIO_DISCARD, | |
80 | RBD_AIO_FLUSH | |
81 | } RBDAIOCmd; | |
82 | ||
83 | typedef struct RBDAIOCB { | |
84 | BlockAIOCB common; | |
85 | int64_t ret; | |
86 | QEMUIOVector *qiov; | |
87 | char *bounce; | |
88 | RBDAIOCmd cmd; | |
89 | int error; | |
90 | struct BDRVRBDState *s; | |
91 | } RBDAIOCB; | |
92 | ||
93 | typedef struct RADOSCB { | |
94 | RBDAIOCB *acb; | |
95 | struct BDRVRBDState *s; | |
96 | int64_t size; | |
97 | char *buf; | |
98 | int64_t ret; | |
99 | } RADOSCB; | |
100 | ||
101 | typedef struct BDRVRBDState { | |
102 | rados_t cluster; | |
103 | rados_ioctx_t io_ctx; | |
104 | rbd_image_t image; | |
105 | char *image_name; | |
106 | char *snap; | |
107 | char *namespace; | |
108 | uint64_t image_size; | |
109 | } BDRVRBDState; | |
110 | ||
111 | static int qemu_rbd_connect(rados_t *cluster, rados_ioctx_t *io_ctx, | |
112 | BlockdevOptionsRbd *opts, bool cache, | |
113 | const char *keypairs, const char *secretid, | |
114 | Error **errp); | |
115 | ||
116 | static char *qemu_rbd_next_tok(char *src, char delim, char **p) | |
117 | { | |
118 | char *end; | |
119 | ||
120 | *p = NULL; | |
121 | ||
122 | for (end = src; *end; ++end) { | |
123 | if (*end == delim) { | |
124 | break; | |
125 | } | |
126 | if (*end == '\\' && end[1] != '\0') { | |
127 | end++; | |
128 | } | |
129 | } | |
130 | if (*end == delim) { | |
131 | *p = end + 1; | |
132 | *end = '\0'; | |
133 | } | |
134 | return src; | |
135 | } | |
136 | ||
137 | static void qemu_rbd_unescape(char *src) | |
138 | { | |
139 | char *p; | |
140 | ||
141 | for (p = src; *src; ++src, ++p) { | |
142 | if (*src == '\\' && src[1] != '\0') { | |
143 | src++; | |
144 | } | |
145 | *p = *src; | |
146 | } | |
147 | *p = '\0'; | |
148 | } | |
149 | ||
150 | static void qemu_rbd_parse_filename(const char *filename, QDict *options, | |
151 | Error **errp) | |
152 | { | |
153 | const char *start; | |
154 | char *p, *buf; | |
155 | QList *keypairs = NULL; | |
156 | char *found_str, *image_name; | |
157 | ||
158 | if (!strstart(filename, "rbd:", &start)) { | |
159 | error_setg(errp, "File name must start with 'rbd:'"); | |
160 | return; | |
161 | } | |
162 | ||
163 | buf = g_strdup(start); | |
164 | p = buf; | |
165 | ||
166 | found_str = qemu_rbd_next_tok(p, '/', &p); | |
167 | if (!p) { | |
168 | error_setg(errp, "Pool name is required"); | |
169 | goto done; | |
170 | } | |
171 | qemu_rbd_unescape(found_str); | |
172 | qdict_put_str(options, "pool", found_str); | |
173 | ||
174 | if (strchr(p, '@')) { | |
175 | image_name = qemu_rbd_next_tok(p, '@', &p); | |
176 | ||
177 | found_str = qemu_rbd_next_tok(p, ':', &p); | |
178 | qemu_rbd_unescape(found_str); | |
179 | qdict_put_str(options, "snapshot", found_str); | |
180 | } else { | |
181 | image_name = qemu_rbd_next_tok(p, ':', &p); | |
182 | } | |
183 | /* Check for namespace in the image_name */ | |
184 | if (strchr(image_name, '/')) { | |
185 | found_str = qemu_rbd_next_tok(image_name, '/', &image_name); | |
186 | qemu_rbd_unescape(found_str); | |
187 | qdict_put_str(options, "namespace", found_str); | |
188 | } else { | |
189 | qdict_put_str(options, "namespace", ""); | |
190 | } | |
191 | qemu_rbd_unescape(image_name); | |
192 | qdict_put_str(options, "image", image_name); | |
193 | if (!p) { | |
194 | goto done; | |
195 | } | |
196 | ||
197 | /* The following are essentially all key/value pairs, and we treat | |
198 | * 'id' and 'conf' a bit special. Key/value pairs may be in any order. */ | |
199 | while (p) { | |
200 | char *name, *value; | |
201 | name = qemu_rbd_next_tok(p, '=', &p); | |
202 | if (!p) { | |
203 | error_setg(errp, "conf option %s has no value", name); | |
204 | break; | |
205 | } | |
206 | ||
207 | qemu_rbd_unescape(name); | |
208 | ||
209 | value = qemu_rbd_next_tok(p, ':', &p); | |
210 | qemu_rbd_unescape(value); | |
211 | ||
212 | if (!strcmp(name, "conf")) { | |
213 | qdict_put_str(options, "conf", value); | |
214 | } else if (!strcmp(name, "id")) { | |
215 | qdict_put_str(options, "user", value); | |
216 | } else { | |
217 | /* | |
218 | * We pass these internally to qemu_rbd_set_keypairs(), so | |
219 | * we can get away with the simpler list of [ "key1", | |
220 | * "value1", "key2", "value2" ] rather than a raw dict | |
221 | * { "key1": "value1", "key2": "value2" } where we can't | |
222 | * guarantee order, or even a more correct but complex | |
223 | * [ { "key1": "value1" }, { "key2": "value2" } ] | |
224 | */ | |
225 | if (!keypairs) { | |
226 | keypairs = qlist_new(); | |
227 | } | |
228 | qlist_append_str(keypairs, name); | |
229 | qlist_append_str(keypairs, value); | |
230 | } | |
231 | } | |
232 | ||
233 | if (keypairs) { | |
234 | qdict_put(options, "=keyvalue-pairs", | |
235 | qobject_to_json(QOBJECT(keypairs))); | |
236 | } | |
237 | ||
238 | done: | |
239 | g_free(buf); | |
240 | qobject_unref(keypairs); | |
241 | return; | |
242 | } | |
243 | ||
244 | ||
245 | static void qemu_rbd_refresh_limits(BlockDriverState *bs, Error **errp) | |
246 | { | |
247 | /* XXX Does RBD support AIO on less than 512-byte alignment? */ | |
248 | bs->bl.request_alignment = 512; | |
249 | } | |
250 | ||
251 | ||
252 | static int qemu_rbd_set_auth(rados_t cluster, BlockdevOptionsRbd *opts, | |
253 | Error **errp) | |
254 | { | |
255 | char *key, *acr; | |
256 | int r; | |
257 | GString *accu; | |
258 | RbdAuthModeList *auth; | |
259 | ||
260 | if (opts->key_secret) { | |
261 | key = qcrypto_secret_lookup_as_base64(opts->key_secret, errp); | |
262 | if (!key) { | |
263 | return -EIO; | |
264 | } | |
265 | r = rados_conf_set(cluster, "key", key); | |
266 | g_free(key); | |
267 | if (r < 0) { | |
268 | error_setg_errno(errp, -r, "Could not set 'key'"); | |
269 | return r; | |
270 | } | |
271 | } | |
272 | ||
273 | if (opts->has_auth_client_required) { | |
274 | accu = g_string_new(""); | |
275 | for (auth = opts->auth_client_required; auth; auth = auth->next) { | |
276 | if (accu->str[0]) { | |
277 | g_string_append_c(accu, ';'); | |
278 | } | |
279 | g_string_append(accu, RbdAuthMode_str(auth->value)); | |
280 | } | |
281 | acr = g_string_free(accu, FALSE); | |
282 | r = rados_conf_set(cluster, "auth_client_required", acr); | |
283 | g_free(acr); | |
284 | if (r < 0) { | |
285 | error_setg_errno(errp, -r, | |
286 | "Could not set 'auth_client_required'"); | |
287 | return r; | |
288 | } | |
289 | } | |
290 | ||
291 | return 0; | |
292 | } | |
293 | ||
294 | static int qemu_rbd_set_keypairs(rados_t cluster, const char *keypairs_json, | |
295 | Error **errp) | |
296 | { | |
297 | QList *keypairs; | |
298 | QString *name; | |
299 | QString *value; | |
300 | const char *key; | |
301 | size_t remaining; | |
302 | int ret = 0; | |
303 | ||
304 | if (!keypairs_json) { | |
305 | return ret; | |
306 | } | |
307 | keypairs = qobject_to(QList, | |
308 | qobject_from_json(keypairs_json, &error_abort)); | |
309 | remaining = qlist_size(keypairs) / 2; | |
310 | assert(remaining); | |
311 | ||
312 | while (remaining--) { | |
313 | name = qobject_to(QString, qlist_pop(keypairs)); | |
314 | value = qobject_to(QString, qlist_pop(keypairs)); | |
315 | assert(name && value); | |
316 | key = qstring_get_str(name); | |
317 | ||
318 | ret = rados_conf_set(cluster, key, qstring_get_str(value)); | |
319 | qobject_unref(value); | |
320 | if (ret < 0) { | |
321 | error_setg_errno(errp, -ret, "invalid conf option %s", key); | |
322 | qobject_unref(name); | |
323 | ret = -EINVAL; | |
324 | break; | |
325 | } | |
326 | qobject_unref(name); | |
327 | } | |
328 | ||
329 | qobject_unref(keypairs); | |
330 | return ret; | |
331 | } | |
332 | ||
333 | static void qemu_rbd_memset(RADOSCB *rcb, int64_t offs) | |
334 | { | |
335 | if (LIBRBD_USE_IOVEC) { | |
336 | RBDAIOCB *acb = rcb->acb; | |
337 | iov_memset(acb->qiov->iov, acb->qiov->niov, offs, 0, | |
338 | acb->qiov->size - offs); | |
339 | } else { | |
340 | memset(rcb->buf + offs, 0, rcb->size - offs); | |
341 | } | |
342 | } | |
343 | ||
344 | static QemuOptsList runtime_opts = { | |
345 | .name = "rbd", | |
346 | .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), | |
347 | .desc = { | |
348 | { | |
349 | .name = "pool", | |
350 | .type = QEMU_OPT_STRING, | |
351 | .help = "Rados pool name", | |
352 | }, | |
353 | { | |
354 | .name = "namespace", | |
355 | .type = QEMU_OPT_STRING, | |
356 | .help = "Rados namespace name in the pool", | |
357 | }, | |
358 | { | |
359 | .name = "image", | |
360 | .type = QEMU_OPT_STRING, | |
361 | .help = "Image name in the pool", | |
362 | }, | |
363 | { | |
364 | .name = "conf", | |
365 | .type = QEMU_OPT_STRING, | |
366 | .help = "Rados config file location", | |
367 | }, | |
368 | { | |
369 | .name = "snapshot", | |
370 | .type = QEMU_OPT_STRING, | |
371 | .help = "Ceph snapshot name", | |
372 | }, | |
373 | { | |
374 | /* maps to 'id' in rados_create() */ | |
375 | .name = "user", | |
376 | .type = QEMU_OPT_STRING, | |
377 | .help = "Rados id name", | |
378 | }, | |
379 | /* | |
380 | * server.* extracted manually, see qemu_rbd_mon_host() | |
381 | */ | |
382 | { /* end of list */ } | |
383 | }, | |
384 | }; | |
385 | ||
386 | /* FIXME Deprecate and remove keypairs or make it available in QMP. */ | |
387 | static int qemu_rbd_do_create(BlockdevCreateOptions *options, | |
388 | const char *keypairs, const char *password_secret, | |
389 | Error **errp) | |
390 | { | |
391 | BlockdevCreateOptionsRbd *opts = &options->u.rbd; | |
392 | rados_t cluster; | |
393 | rados_ioctx_t io_ctx; | |
394 | int obj_order = 0; | |
395 | int ret; | |
396 | ||
397 | assert(options->driver == BLOCKDEV_DRIVER_RBD); | |
398 | if (opts->location->has_snapshot) { | |
399 | error_setg(errp, "Can't use snapshot name for image creation"); | |
400 | return -EINVAL; | |
401 | } | |
402 | ||
403 | if (opts->has_cluster_size) { | |
404 | int64_t objsize = opts->cluster_size; | |
405 | if ((objsize - 1) & objsize) { /* not a power of 2? */ | |
406 | error_setg(errp, "obj size needs to be power of 2"); | |
407 | return -EINVAL; | |
408 | } | |
409 | if (objsize < 4096) { | |
410 | error_setg(errp, "obj size too small"); | |
411 | return -EINVAL; | |
412 | } | |
413 | obj_order = ctz32(objsize); | |
414 | } | |
415 | ||
416 | ret = qemu_rbd_connect(&cluster, &io_ctx, opts->location, false, keypairs, | |
417 | password_secret, errp); | |
418 | if (ret < 0) { | |
419 | return ret; | |
420 | } | |
421 | ||
422 | ret = rbd_create(io_ctx, opts->location->image, opts->size, &obj_order); | |
423 | if (ret < 0) { | |
424 | error_setg_errno(errp, -ret, "error rbd create"); | |
425 | goto out; | |
426 | } | |
427 | ||
428 | ret = 0; | |
429 | out: | |
430 | rados_ioctx_destroy(io_ctx); | |
431 | rados_shutdown(cluster); | |
432 | return ret; | |
433 | } | |
434 | ||
435 | static int qemu_rbd_co_create(BlockdevCreateOptions *options, Error **errp) | |
436 | { | |
437 | return qemu_rbd_do_create(options, NULL, NULL, errp); | |
438 | } | |
439 | ||
440 | static int coroutine_fn qemu_rbd_co_create_opts(BlockDriver *drv, | |
441 | const char *filename, | |
442 | QemuOpts *opts, | |
443 | Error **errp) | |
444 | { | |
445 | BlockdevCreateOptions *create_options; | |
446 | BlockdevCreateOptionsRbd *rbd_opts; | |
447 | BlockdevOptionsRbd *loc; | |
448 | Error *local_err = NULL; | |
449 | const char *keypairs, *password_secret; | |
450 | QDict *options = NULL; | |
451 | int ret = 0; | |
452 | ||
453 | create_options = g_new0(BlockdevCreateOptions, 1); | |
454 | create_options->driver = BLOCKDEV_DRIVER_RBD; | |
455 | rbd_opts = &create_options->u.rbd; | |
456 | ||
457 | rbd_opts->location = g_new0(BlockdevOptionsRbd, 1); | |
458 | ||
459 | password_secret = qemu_opt_get(opts, "password-secret"); | |
460 | ||
461 | /* Read out options */ | |
462 | rbd_opts->size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), | |
463 | BDRV_SECTOR_SIZE); | |
464 | rbd_opts->cluster_size = qemu_opt_get_size_del(opts, | |
465 | BLOCK_OPT_CLUSTER_SIZE, 0); | |
466 | rbd_opts->has_cluster_size = (rbd_opts->cluster_size != 0); | |
467 | ||
468 | options = qdict_new(); | |
469 | qemu_rbd_parse_filename(filename, options, &local_err); | |
470 | if (local_err) { | |
471 | ret = -EINVAL; | |
472 | error_propagate(errp, local_err); | |
473 | goto exit; | |
474 | } | |
475 | ||
476 | /* | |
477 | * Caution: while qdict_get_try_str() is fine, getting non-string | |
478 | * types would require more care. When @options come from -blockdev | |
479 | * or blockdev_add, its members are typed according to the QAPI | |
480 | * schema, but when they come from -drive, they're all QString. | |
481 | */ | |
482 | loc = rbd_opts->location; | |
483 | loc->pool = g_strdup(qdict_get_try_str(options, "pool")); | |
484 | loc->conf = g_strdup(qdict_get_try_str(options, "conf")); | |
485 | loc->has_conf = !!loc->conf; | |
486 | loc->user = g_strdup(qdict_get_try_str(options, "user")); | |
487 | loc->has_user = !!loc->user; | |
488 | loc->q_namespace = g_strdup(qdict_get_try_str(options, "namespace")); | |
489 | loc->image = g_strdup(qdict_get_try_str(options, "image")); | |
490 | keypairs = qdict_get_try_str(options, "=keyvalue-pairs"); | |
491 | ||
492 | ret = qemu_rbd_do_create(create_options, keypairs, password_secret, errp); | |
493 | if (ret < 0) { | |
494 | goto exit; | |
495 | } | |
496 | ||
497 | exit: | |
498 | qobject_unref(options); | |
499 | qapi_free_BlockdevCreateOptions(create_options); | |
500 | return ret; | |
501 | } | |
502 | ||
503 | /* | |
504 | * This aio completion is being called from rbd_finish_bh() and runs in qemu | |
505 | * BH context. | |
506 | */ | |
507 | static void qemu_rbd_complete_aio(RADOSCB *rcb) | |
508 | { | |
509 | RBDAIOCB *acb = rcb->acb; | |
510 | int64_t r; | |
511 | ||
512 | r = rcb->ret; | |
513 | ||
514 | if (acb->cmd != RBD_AIO_READ) { | |
515 | if (r < 0) { | |
516 | acb->ret = r; | |
517 | acb->error = 1; | |
518 | } else if (!acb->error) { | |
519 | acb->ret = rcb->size; | |
520 | } | |
521 | } else { | |
522 | if (r < 0) { | |
523 | qemu_rbd_memset(rcb, 0); | |
524 | acb->ret = r; | |
525 | acb->error = 1; | |
526 | } else if (r < rcb->size) { | |
527 | qemu_rbd_memset(rcb, r); | |
528 | if (!acb->error) { | |
529 | acb->ret = rcb->size; | |
530 | } | |
531 | } else if (!acb->error) { | |
532 | acb->ret = r; | |
533 | } | |
534 | } | |
535 | ||
536 | g_free(rcb); | |
537 | ||
538 | if (!LIBRBD_USE_IOVEC) { | |
539 | if (acb->cmd == RBD_AIO_READ) { | |
540 | qemu_iovec_from_buf(acb->qiov, 0, acb->bounce, acb->qiov->size); | |
541 | } | |
542 | qemu_vfree(acb->bounce); | |
543 | } | |
544 | ||
545 | acb->common.cb(acb->common.opaque, (acb->ret > 0 ? 0 : acb->ret)); | |
546 | ||
547 | qemu_aio_unref(acb); | |
548 | } | |
549 | ||
550 | static char *qemu_rbd_mon_host(BlockdevOptionsRbd *opts, Error **errp) | |
551 | { | |
552 | const char **vals; | |
553 | const char *host, *port; | |
554 | char *rados_str; | |
555 | InetSocketAddressBaseList *p; | |
556 | int i, cnt; | |
557 | ||
558 | if (!opts->has_server) { | |
559 | return NULL; | |
560 | } | |
561 | ||
562 | for (cnt = 0, p = opts->server; p; p = p->next) { | |
563 | cnt++; | |
564 | } | |
565 | ||
566 | vals = g_new(const char *, cnt + 1); | |
567 | ||
568 | for (i = 0, p = opts->server; p; p = p->next, i++) { | |
569 | host = p->value->host; | |
570 | port = p->value->port; | |
571 | ||
572 | if (strchr(host, ':')) { | |
573 | vals[i] = g_strdup_printf("[%s]:%s", host, port); | |
574 | } else { | |
575 | vals[i] = g_strdup_printf("%s:%s", host, port); | |
576 | } | |
577 | } | |
578 | vals[i] = NULL; | |
579 | ||
580 | rados_str = i ? g_strjoinv(";", (char **)vals) : NULL; | |
581 | g_strfreev((char **)vals); | |
582 | return rados_str; | |
583 | } | |
584 | ||
585 | static int qemu_rbd_connect(rados_t *cluster, rados_ioctx_t *io_ctx, | |
586 | BlockdevOptionsRbd *opts, bool cache, | |
587 | const char *keypairs, const char *secretid, | |
588 | Error **errp) | |
589 | { | |
590 | char *mon_host = NULL; | |
591 | Error *local_err = NULL; | |
592 | int r; | |
593 | ||
594 | if (secretid) { | |
595 | if (opts->key_secret) { | |
596 | error_setg(errp, | |
597 | "Legacy 'password-secret' clashes with 'key-secret'"); | |
598 | return -EINVAL; | |
599 | } | |
600 | opts->key_secret = g_strdup(secretid); | |
601 | opts->has_key_secret = true; | |
602 | } | |
603 | ||
604 | mon_host = qemu_rbd_mon_host(opts, &local_err); | |
605 | if (local_err) { | |
606 | error_propagate(errp, local_err); | |
607 | r = -EINVAL; | |
608 | goto failed_opts; | |
609 | } | |
610 | ||
611 | r = rados_create(cluster, opts->user); | |
612 | if (r < 0) { | |
613 | error_setg_errno(errp, -r, "error initializing"); | |
614 | goto failed_opts; | |
615 | } | |
616 | ||
617 | /* try default location when conf=NULL, but ignore failure */ | |
618 | r = rados_conf_read_file(*cluster, opts->conf); | |
619 | if (opts->has_conf && r < 0) { | |
620 | error_setg_errno(errp, -r, "error reading conf file %s", opts->conf); | |
621 | goto failed_shutdown; | |
622 | } | |
623 | ||
624 | r = qemu_rbd_set_keypairs(*cluster, keypairs, errp); | |
625 | if (r < 0) { | |
626 | goto failed_shutdown; | |
627 | } | |
628 | ||
629 | if (mon_host) { | |
630 | r = rados_conf_set(*cluster, "mon_host", mon_host); | |
631 | if (r < 0) { | |
632 | goto failed_shutdown; | |
633 | } | |
634 | } | |
635 | ||
636 | r = qemu_rbd_set_auth(*cluster, opts, errp); | |
637 | if (r < 0) { | |
638 | goto failed_shutdown; | |
639 | } | |
640 | ||
641 | /* | |
642 | * Fallback to more conservative semantics if setting cache | |
643 | * options fails. Ignore errors from setting rbd_cache because the | |
644 | * only possible error is that the option does not exist, and | |
645 | * librbd defaults to no caching. If write through caching cannot | |
646 | * be set up, fall back to no caching. | |
647 | */ | |
648 | if (cache) { | |
649 | rados_conf_set(*cluster, "rbd_cache", "true"); | |
650 | } else { | |
651 | rados_conf_set(*cluster, "rbd_cache", "false"); | |
652 | } | |
653 | ||
654 | r = rados_connect(*cluster); | |
655 | if (r < 0) { | |
656 | error_setg_errno(errp, -r, "error connecting"); | |
657 | goto failed_shutdown; | |
658 | } | |
659 | ||
660 | r = rados_ioctx_create(*cluster, opts->pool, io_ctx); | |
661 | if (r < 0) { | |
662 | error_setg_errno(errp, -r, "error opening pool %s", opts->pool); | |
663 | goto failed_shutdown; | |
664 | } | |
665 | /* | |
666 | * Set the namespace after opening the io context on the pool, | |
667 | * if nspace == NULL or if nspace == "", it is just as we did nothing | |
668 | */ | |
669 | rados_ioctx_set_namespace(*io_ctx, opts->q_namespace); | |
670 | ||
671 | return 0; | |
672 | ||
673 | failed_shutdown: | |
674 | rados_shutdown(*cluster); | |
675 | failed_opts: | |
676 | g_free(mon_host); | |
677 | return r; | |
678 | } | |
679 | ||
680 | static int qemu_rbd_convert_options(QDict *options, BlockdevOptionsRbd **opts, | |
681 | Error **errp) | |
682 | { | |
683 | Visitor *v; | |
684 | Error *local_err = NULL; | |
685 | ||
686 | /* Convert the remaining options into a QAPI object */ | |
687 | v = qobject_input_visitor_new_flat_confused(options, errp); | |
688 | if (!v) { | |
689 | return -EINVAL; | |
690 | } | |
691 | ||
692 | visit_type_BlockdevOptionsRbd(v, NULL, opts, &local_err); | |
693 | visit_free(v); | |
694 | ||
695 | if (local_err) { | |
696 | error_propagate(errp, local_err); | |
697 | return -EINVAL; | |
698 | } | |
699 | ||
700 | return 0; | |
701 | } | |
702 | ||
703 | static int qemu_rbd_attempt_legacy_options(QDict *options, | |
704 | BlockdevOptionsRbd **opts, | |
705 | char **keypairs) | |
706 | { | |
707 | char *filename; | |
708 | int r; | |
709 | ||
710 | filename = g_strdup(qdict_get_try_str(options, "filename")); | |
711 | if (!filename) { | |
712 | return -EINVAL; | |
713 | } | |
714 | qdict_del(options, "filename"); | |
715 | ||
716 | qemu_rbd_parse_filename(filename, options, NULL); | |
717 | ||
718 | /* keypairs freed by caller */ | |
719 | *keypairs = g_strdup(qdict_get_try_str(options, "=keyvalue-pairs")); | |
720 | if (*keypairs) { | |
721 | qdict_del(options, "=keyvalue-pairs"); | |
722 | } | |
723 | ||
724 | r = qemu_rbd_convert_options(options, opts, NULL); | |
725 | ||
726 | g_free(filename); | |
727 | return r; | |
728 | } | |
729 | ||
730 | static int qemu_rbd_open(BlockDriverState *bs, QDict *options, int flags, | |
731 | Error **errp) | |
732 | { | |
733 | BDRVRBDState *s = bs->opaque; | |
734 | BlockdevOptionsRbd *opts = NULL; | |
735 | const QDictEntry *e; | |
736 | Error *local_err = NULL; | |
737 | char *keypairs, *secretid; | |
738 | int r; | |
739 | ||
740 | keypairs = g_strdup(qdict_get_try_str(options, "=keyvalue-pairs")); | |
741 | if (keypairs) { | |
742 | qdict_del(options, "=keyvalue-pairs"); | |
743 | } | |
744 | ||
745 | secretid = g_strdup(qdict_get_try_str(options, "password-secret")); | |
746 | if (secretid) { | |
747 | qdict_del(options, "password-secret"); | |
748 | } | |
749 | ||
750 | r = qemu_rbd_convert_options(options, &opts, &local_err); | |
751 | if (local_err) { | |
752 | /* If keypairs are present, that means some options are present in | |
753 | * the modern option format. Don't attempt to parse legacy option | |
754 | * formats, as we won't support mixed usage. */ | |
755 | if (keypairs) { | |
756 | error_propagate(errp, local_err); | |
757 | goto out; | |
758 | } | |
759 | ||
760 | /* If the initial attempt to convert and process the options failed, | |
761 | * we may be attempting to open an image file that has the rbd options | |
762 | * specified in the older format consisting of all key/value pairs | |
763 | * encoded in the filename. Go ahead and attempt to parse the | |
764 | * filename, and see if we can pull out the required options. */ | |
765 | r = qemu_rbd_attempt_legacy_options(options, &opts, &keypairs); | |
766 | if (r < 0) { | |
767 | /* Propagate the original error, not the legacy parsing fallback | |
768 | * error, as the latter was just a best-effort attempt. */ | |
769 | error_propagate(errp, local_err); | |
770 | goto out; | |
771 | } | |
772 | /* Take care whenever deciding to actually deprecate; once this ability | |
773 | * is removed, we will not be able to open any images with legacy-styled | |
774 | * backing image strings. */ | |
775 | warn_report("RBD options encoded in the filename as keyvalue pairs " | |
776 | "is deprecated"); | |
777 | } | |
778 | ||
779 | /* Remove the processed options from the QDict (the visitor processes | |
780 | * _all_ options in the QDict) */ | |
781 | while ((e = qdict_first(options))) { | |
782 | qdict_del(options, e->key); | |
783 | } | |
784 | ||
785 | r = qemu_rbd_connect(&s->cluster, &s->io_ctx, opts, | |
786 | !(flags & BDRV_O_NOCACHE), keypairs, secretid, errp); | |
787 | if (r < 0) { | |
788 | goto out; | |
789 | } | |
790 | ||
791 | s->snap = g_strdup(opts->snapshot); | |
792 | s->image_name = g_strdup(opts->image); | |
793 | ||
794 | /* rbd_open is always r/w */ | |
795 | r = rbd_open(s->io_ctx, s->image_name, &s->image, s->snap); | |
796 | if (r < 0) { | |
797 | error_setg_errno(errp, -r, "error reading header from %s", | |
798 | s->image_name); | |
799 | goto failed_open; | |
800 | } | |
801 | ||
802 | r = rbd_get_size(s->image, &s->image_size); | |
803 | if (r < 0) { | |
804 | error_setg_errno(errp, -r, "error getting image size from %s", | |
805 | s->image_name); | |
806 | rbd_close(s->image); | |
807 | goto failed_open; | |
808 | } | |
809 | ||
810 | /* If we are using an rbd snapshot, we must be r/o, otherwise | |
811 | * leave as-is */ | |
812 | if (s->snap != NULL) { | |
813 | r = bdrv_apply_auto_read_only(bs, "rbd snapshots are read-only", errp); | |
814 | if (r < 0) { | |
815 | rbd_close(s->image); | |
816 | goto failed_open; | |
817 | } | |
818 | } | |
819 | ||
820 | r = 0; | |
821 | goto out; | |
822 | ||
823 | failed_open: | |
824 | rados_ioctx_destroy(s->io_ctx); | |
825 | g_free(s->snap); | |
826 | g_free(s->image_name); | |
827 | rados_shutdown(s->cluster); | |
828 | out: | |
829 | qapi_free_BlockdevOptionsRbd(opts); | |
830 | g_free(keypairs); | |
831 | g_free(secretid); | |
832 | return r; | |
833 | } | |
834 | ||
835 | ||
836 | /* Since RBD is currently always opened R/W via the API, | |
837 | * we just need to check if we are using a snapshot or not, in | |
838 | * order to determine if we will allow it to be R/W */ | |
839 | static int qemu_rbd_reopen_prepare(BDRVReopenState *state, | |
840 | BlockReopenQueue *queue, Error **errp) | |
841 | { | |
842 | BDRVRBDState *s = state->bs->opaque; | |
843 | int ret = 0; | |
844 | ||
845 | if (s->snap && state->flags & BDRV_O_RDWR) { | |
846 | error_setg(errp, | |
847 | "Cannot change node '%s' to r/w when using RBD snapshot", | |
848 | bdrv_get_device_or_node_name(state->bs)); | |
849 | ret = -EINVAL; | |
850 | } | |
851 | ||
852 | return ret; | |
853 | } | |
854 | ||
855 | static void qemu_rbd_close(BlockDriverState *bs) | |
856 | { | |
857 | BDRVRBDState *s = bs->opaque; | |
858 | ||
859 | rbd_close(s->image); | |
860 | rados_ioctx_destroy(s->io_ctx); | |
861 | g_free(s->snap); | |
862 | g_free(s->image_name); | |
863 | rados_shutdown(s->cluster); | |
864 | } | |
865 | ||
866 | /* Resize the RBD image and update the 'image_size' with the current size */ | |
867 | static int qemu_rbd_resize(BlockDriverState *bs, uint64_t size) | |
868 | { | |
869 | BDRVRBDState *s = bs->opaque; | |
870 | int r; | |
871 | ||
872 | r = rbd_resize(s->image, size); | |
873 | if (r < 0) { | |
874 | return r; | |
875 | } | |
876 | ||
877 | s->image_size = size; | |
878 | ||
879 | return 0; | |
880 | } | |
881 | ||
882 | static const AIOCBInfo rbd_aiocb_info = { | |
883 | .aiocb_size = sizeof(RBDAIOCB), | |
884 | }; | |
885 | ||
886 | static void rbd_finish_bh(void *opaque) | |
887 | { | |
888 | RADOSCB *rcb = opaque; | |
889 | qemu_rbd_complete_aio(rcb); | |
890 | } | |
891 | ||
892 | /* | |
893 | * This is the callback function for rbd_aio_read and _write | |
894 | * | |
895 | * Note: this function is being called from a non qemu thread so | |
896 | * we need to be careful about what we do here. Generally we only | |
897 | * schedule a BH, and do the rest of the io completion handling | |
898 | * from rbd_finish_bh() which runs in a qemu context. | |
899 | */ | |
900 | static void rbd_finish_aiocb(rbd_completion_t c, RADOSCB *rcb) | |
901 | { | |
902 | RBDAIOCB *acb = rcb->acb; | |
903 | ||
904 | rcb->ret = rbd_aio_get_return_value(c); | |
905 | rbd_aio_release(c); | |
906 | ||
907 | replay_bh_schedule_oneshot_event(bdrv_get_aio_context(acb->common.bs), | |
908 | rbd_finish_bh, rcb); | |
909 | } | |
910 | ||
911 | static int rbd_aio_discard_wrapper(rbd_image_t image, | |
912 | uint64_t off, | |
913 | uint64_t len, | |
914 | rbd_completion_t comp) | |
915 | { | |
916 | #ifdef LIBRBD_SUPPORTS_DISCARD | |
917 | return rbd_aio_discard(image, off, len, comp); | |
918 | #else | |
919 | return -ENOTSUP; | |
920 | #endif | |
921 | } | |
922 | ||
923 | static int rbd_aio_flush_wrapper(rbd_image_t image, | |
924 | rbd_completion_t comp) | |
925 | { | |
926 | #ifdef LIBRBD_SUPPORTS_AIO_FLUSH | |
927 | return rbd_aio_flush(image, comp); | |
928 | #else | |
929 | return -ENOTSUP; | |
930 | #endif | |
931 | } | |
932 | ||
933 | static BlockAIOCB *rbd_start_aio(BlockDriverState *bs, | |
934 | int64_t off, | |
935 | QEMUIOVector *qiov, | |
936 | int64_t size, | |
937 | BlockCompletionFunc *cb, | |
938 | void *opaque, | |
939 | RBDAIOCmd cmd) | |
940 | { | |
941 | RBDAIOCB *acb; | |
942 | RADOSCB *rcb = NULL; | |
943 | rbd_completion_t c; | |
944 | int r; | |
945 | ||
946 | BDRVRBDState *s = bs->opaque; | |
947 | ||
948 | acb = qemu_aio_get(&rbd_aiocb_info, bs, cb, opaque); | |
949 | acb->cmd = cmd; | |
950 | acb->qiov = qiov; | |
951 | assert(!qiov || qiov->size == size); | |
952 | ||
953 | rcb = g_new(RADOSCB, 1); | |
954 | ||
955 | if (!LIBRBD_USE_IOVEC) { | |
956 | if (cmd == RBD_AIO_DISCARD || cmd == RBD_AIO_FLUSH) { | |
957 | acb->bounce = NULL; | |
958 | } else { | |
959 | acb->bounce = qemu_try_blockalign(bs, qiov->size); | |
960 | if (acb->bounce == NULL) { | |
961 | goto failed; | |
962 | } | |
963 | } | |
964 | if (cmd == RBD_AIO_WRITE) { | |
965 | qemu_iovec_to_buf(acb->qiov, 0, acb->bounce, qiov->size); | |
966 | } | |
967 | rcb->buf = acb->bounce; | |
968 | } | |
969 | ||
970 | acb->ret = 0; | |
971 | acb->error = 0; | |
972 | acb->s = s; | |
973 | ||
974 | rcb->acb = acb; | |
975 | rcb->s = acb->s; | |
976 | rcb->size = size; | |
977 | r = rbd_aio_create_completion(rcb, (rbd_callback_t) rbd_finish_aiocb, &c); | |
978 | if (r < 0) { | |
979 | goto failed; | |
980 | } | |
981 | ||
982 | switch (cmd) { | |
983 | case RBD_AIO_WRITE: { | |
984 | /* | |
985 | * RBD APIs don't allow us to write more than actual size, so in order | |
986 | * to support growing images, we resize the image before write | |
987 | * operations that exceed the current size. | |
988 | */ | |
989 | if (off + size > s->image_size) { | |
990 | r = qemu_rbd_resize(bs, off + size); | |
991 | if (r < 0) { | |
992 | goto failed_completion; | |
993 | } | |
994 | } | |
995 | #ifdef LIBRBD_SUPPORTS_IOVEC | |
996 | r = rbd_aio_writev(s->image, qiov->iov, qiov->niov, off, c); | |
997 | #else | |
998 | r = rbd_aio_write(s->image, off, size, rcb->buf, c); | |
999 | #endif | |
1000 | break; | |
1001 | } | |
1002 | case RBD_AIO_READ: | |
1003 | #ifdef LIBRBD_SUPPORTS_IOVEC | |
1004 | r = rbd_aio_readv(s->image, qiov->iov, qiov->niov, off, c); | |
1005 | #else | |
1006 | r = rbd_aio_read(s->image, off, size, rcb->buf, c); | |
1007 | #endif | |
1008 | break; | |
1009 | case RBD_AIO_DISCARD: | |
1010 | r = rbd_aio_discard_wrapper(s->image, off, size, c); | |
1011 | break; | |
1012 | case RBD_AIO_FLUSH: | |
1013 | r = rbd_aio_flush_wrapper(s->image, c); | |
1014 | break; | |
1015 | default: | |
1016 | r = -EINVAL; | |
1017 | } | |
1018 | ||
1019 | if (r < 0) { | |
1020 | goto failed_completion; | |
1021 | } | |
1022 | return &acb->common; | |
1023 | ||
1024 | failed_completion: | |
1025 | rbd_aio_release(c); | |
1026 | failed: | |
1027 | g_free(rcb); | |
1028 | if (!LIBRBD_USE_IOVEC) { | |
1029 | qemu_vfree(acb->bounce); | |
1030 | } | |
1031 | ||
1032 | qemu_aio_unref(acb); | |
1033 | return NULL; | |
1034 | } | |
1035 | ||
1036 | static BlockAIOCB *qemu_rbd_aio_preadv(BlockDriverState *bs, | |
1037 | uint64_t offset, uint64_t bytes, | |
1038 | QEMUIOVector *qiov, int flags, | |
1039 | BlockCompletionFunc *cb, | |
1040 | void *opaque) | |
1041 | { | |
1042 | return rbd_start_aio(bs, offset, qiov, bytes, cb, opaque, | |
1043 | RBD_AIO_READ); | |
1044 | } | |
1045 | ||
1046 | static BlockAIOCB *qemu_rbd_aio_pwritev(BlockDriverState *bs, | |
1047 | uint64_t offset, uint64_t bytes, | |
1048 | QEMUIOVector *qiov, int flags, | |
1049 | BlockCompletionFunc *cb, | |
1050 | void *opaque) | |
1051 | { | |
1052 | return rbd_start_aio(bs, offset, qiov, bytes, cb, opaque, | |
1053 | RBD_AIO_WRITE); | |
1054 | } | |
1055 | ||
1056 | #ifdef LIBRBD_SUPPORTS_AIO_FLUSH | |
1057 | static BlockAIOCB *qemu_rbd_aio_flush(BlockDriverState *bs, | |
1058 | BlockCompletionFunc *cb, | |
1059 | void *opaque) | |
1060 | { | |
1061 | return rbd_start_aio(bs, 0, NULL, 0, cb, opaque, RBD_AIO_FLUSH); | |
1062 | } | |
1063 | ||
1064 | #else | |
1065 | ||
1066 | static int qemu_rbd_co_flush(BlockDriverState *bs) | |
1067 | { | |
1068 | #if LIBRBD_VERSION_CODE >= LIBRBD_VERSION(0, 1, 1) | |
1069 | /* rbd_flush added in 0.1.1 */ | |
1070 | BDRVRBDState *s = bs->opaque; | |
1071 | return rbd_flush(s->image); | |
1072 | #else | |
1073 | return 0; | |
1074 | #endif | |
1075 | } | |
1076 | #endif | |
1077 | ||
1078 | static int qemu_rbd_getinfo(BlockDriverState *bs, BlockDriverInfo *bdi) | |
1079 | { | |
1080 | BDRVRBDState *s = bs->opaque; | |
1081 | rbd_image_info_t info; | |
1082 | int r; | |
1083 | ||
1084 | r = rbd_stat(s->image, &info, sizeof(info)); | |
1085 | if (r < 0) { | |
1086 | return r; | |
1087 | } | |
1088 | ||
1089 | bdi->cluster_size = info.obj_size; | |
1090 | return 0; | |
1091 | } | |
1092 | ||
1093 | static int64_t qemu_rbd_getlength(BlockDriverState *bs) | |
1094 | { | |
1095 | BDRVRBDState *s = bs->opaque; | |
1096 | rbd_image_info_t info; | |
1097 | int r; | |
1098 | ||
1099 | r = rbd_stat(s->image, &info, sizeof(info)); | |
1100 | if (r < 0) { | |
1101 | return r; | |
1102 | } | |
1103 | ||
1104 | return info.size; | |
1105 | } | |
1106 | ||
1107 | static int coroutine_fn qemu_rbd_co_truncate(BlockDriverState *bs, | |
1108 | int64_t offset, | |
1109 | bool exact, | |
1110 | PreallocMode prealloc, | |
1111 | BdrvRequestFlags flags, | |
1112 | Error **errp) | |
1113 | { | |
1114 | int r; | |
1115 | ||
1116 | if (prealloc != PREALLOC_MODE_OFF) { | |
1117 | error_setg(errp, "Unsupported preallocation mode '%s'", | |
1118 | PreallocMode_str(prealloc)); | |
1119 | return -ENOTSUP; | |
1120 | } | |
1121 | ||
1122 | r = qemu_rbd_resize(bs, offset); | |
1123 | if (r < 0) { | |
1124 | error_setg_errno(errp, -r, "Failed to resize file"); | |
1125 | return r; | |
1126 | } | |
1127 | ||
1128 | return 0; | |
1129 | } | |
1130 | ||
1131 | static int qemu_rbd_snap_create(BlockDriverState *bs, | |
1132 | QEMUSnapshotInfo *sn_info) | |
1133 | { | |
1134 | BDRVRBDState *s = bs->opaque; | |
1135 | int r; | |
1136 | ||
1137 | if (sn_info->name[0] == '\0') { | |
1138 | return -EINVAL; /* we need a name for rbd snapshots */ | |
1139 | } | |
1140 | ||
1141 | /* | |
1142 | * rbd snapshots are using the name as the user controlled unique identifier | |
1143 | * we can't use the rbd snapid for that purpose, as it can't be set | |
1144 | */ | |
1145 | if (sn_info->id_str[0] != '\0' && | |
1146 | strcmp(sn_info->id_str, sn_info->name) != 0) { | |
1147 | return -EINVAL; | |
1148 | } | |
1149 | ||
1150 | if (strlen(sn_info->name) >= sizeof(sn_info->id_str)) { | |
1151 | return -ERANGE; | |
1152 | } | |
1153 | ||
1154 | r = rbd_snap_create(s->image, sn_info->name); | |
1155 | if (r < 0) { | |
1156 | error_report("failed to create snap: %s", strerror(-r)); | |
1157 | return r; | |
1158 | } | |
1159 | ||
1160 | return 0; | |
1161 | } | |
1162 | ||
1163 | static int qemu_rbd_snap_remove(BlockDriverState *bs, | |
1164 | const char *snapshot_id, | |
1165 | const char *snapshot_name, | |
1166 | Error **errp) | |
1167 | { | |
1168 | BDRVRBDState *s = bs->opaque; | |
1169 | int r; | |
1170 | ||
1171 | if (!snapshot_name) { | |
1172 | error_setg(errp, "rbd need a valid snapshot name"); | |
1173 | return -EINVAL; | |
1174 | } | |
1175 | ||
1176 | /* If snapshot_id is specified, it must be equal to name, see | |
1177 | qemu_rbd_snap_list() */ | |
1178 | if (snapshot_id && strcmp(snapshot_id, snapshot_name)) { | |
1179 | error_setg(errp, | |
1180 | "rbd do not support snapshot id, it should be NULL or " | |
1181 | "equal to snapshot name"); | |
1182 | return -EINVAL; | |
1183 | } | |
1184 | ||
1185 | r = rbd_snap_remove(s->image, snapshot_name); | |
1186 | if (r < 0) { | |
1187 | error_setg_errno(errp, -r, "Failed to remove the snapshot"); | |
1188 | } | |
1189 | return r; | |
1190 | } | |
1191 | ||
1192 | static int qemu_rbd_snap_rollback(BlockDriverState *bs, | |
1193 | const char *snapshot_name) | |
1194 | { | |
1195 | BDRVRBDState *s = bs->opaque; | |
1196 | ||
1197 | return rbd_snap_rollback(s->image, snapshot_name); | |
1198 | } | |
1199 | ||
1200 | static int qemu_rbd_snap_list(BlockDriverState *bs, | |
1201 | QEMUSnapshotInfo **psn_tab) | |
1202 | { | |
1203 | BDRVRBDState *s = bs->opaque; | |
1204 | QEMUSnapshotInfo *sn_info, *sn_tab = NULL; | |
1205 | int i, snap_count; | |
1206 | rbd_snap_info_t *snaps; | |
1207 | int max_snaps = RBD_MAX_SNAPS; | |
1208 | ||
1209 | do { | |
1210 | snaps = g_new(rbd_snap_info_t, max_snaps); | |
1211 | snap_count = rbd_snap_list(s->image, snaps, &max_snaps); | |
1212 | if (snap_count <= 0) { | |
1213 | g_free(snaps); | |
1214 | } | |
1215 | } while (snap_count == -ERANGE); | |
1216 | ||
1217 | if (snap_count <= 0) { | |
1218 | goto done; | |
1219 | } | |
1220 | ||
1221 | sn_tab = g_new0(QEMUSnapshotInfo, snap_count); | |
1222 | ||
1223 | for (i = 0; i < snap_count; i++) { | |
1224 | const char *snap_name = snaps[i].name; | |
1225 | ||
1226 | sn_info = sn_tab + i; | |
1227 | pstrcpy(sn_info->id_str, sizeof(sn_info->id_str), snap_name); | |
1228 | pstrcpy(sn_info->name, sizeof(sn_info->name), snap_name); | |
1229 | ||
1230 | sn_info->vm_state_size = snaps[i].size; | |
1231 | sn_info->date_sec = 0; | |
1232 | sn_info->date_nsec = 0; | |
1233 | sn_info->vm_clock_nsec = 0; | |
1234 | } | |
1235 | rbd_snap_list_end(snaps); | |
1236 | g_free(snaps); | |
1237 | ||
1238 | done: | |
1239 | *psn_tab = sn_tab; | |
1240 | return snap_count; | |
1241 | } | |
1242 | ||
1243 | #ifdef LIBRBD_SUPPORTS_DISCARD | |
1244 | static BlockAIOCB *qemu_rbd_aio_pdiscard(BlockDriverState *bs, | |
1245 | int64_t offset, | |
1246 | int bytes, | |
1247 | BlockCompletionFunc *cb, | |
1248 | void *opaque) | |
1249 | { | |
1250 | return rbd_start_aio(bs, offset, NULL, bytes, cb, opaque, | |
1251 | RBD_AIO_DISCARD); | |
1252 | } | |
1253 | #endif | |
1254 | ||
1255 | #ifdef LIBRBD_SUPPORTS_INVALIDATE | |
1256 | static void coroutine_fn qemu_rbd_co_invalidate_cache(BlockDriverState *bs, | |
1257 | Error **errp) | |
1258 | { | |
1259 | BDRVRBDState *s = bs->opaque; | |
1260 | int r = rbd_invalidate_cache(s->image); | |
1261 | if (r < 0) { | |
1262 | error_setg_errno(errp, -r, "Failed to invalidate the cache"); | |
1263 | } | |
1264 | } | |
1265 | #endif | |
1266 | ||
1267 | static QemuOptsList qemu_rbd_create_opts = { | |
1268 | .name = "rbd-create-opts", | |
1269 | .head = QTAILQ_HEAD_INITIALIZER(qemu_rbd_create_opts.head), | |
1270 | .desc = { | |
1271 | { | |
1272 | .name = BLOCK_OPT_SIZE, | |
1273 | .type = QEMU_OPT_SIZE, | |
1274 | .help = "Virtual disk size" | |
1275 | }, | |
1276 | { | |
1277 | .name = BLOCK_OPT_CLUSTER_SIZE, | |
1278 | .type = QEMU_OPT_SIZE, | |
1279 | .help = "RBD object size" | |
1280 | }, | |
1281 | { | |
1282 | .name = "password-secret", | |
1283 | .type = QEMU_OPT_STRING, | |
1284 | .help = "ID of secret providing the password", | |
1285 | }, | |
1286 | { /* end of list */ } | |
1287 | } | |
1288 | }; | |
1289 | ||
1290 | static const char *const qemu_rbd_strong_runtime_opts[] = { | |
1291 | "pool", | |
1292 | "image", | |
1293 | "conf", | |
1294 | "snapshot", | |
1295 | "user", | |
1296 | "server.", | |
1297 | "password-secret", | |
1298 | ||
1299 | NULL | |
1300 | }; | |
1301 | ||
1302 | static BlockDriver bdrv_rbd = { | |
1303 | .format_name = "rbd", | |
1304 | .instance_size = sizeof(BDRVRBDState), | |
1305 | .bdrv_parse_filename = qemu_rbd_parse_filename, | |
1306 | .bdrv_refresh_limits = qemu_rbd_refresh_limits, | |
1307 | .bdrv_file_open = qemu_rbd_open, | |
1308 | .bdrv_close = qemu_rbd_close, | |
1309 | .bdrv_reopen_prepare = qemu_rbd_reopen_prepare, | |
1310 | .bdrv_co_create = qemu_rbd_co_create, | |
1311 | .bdrv_co_create_opts = qemu_rbd_co_create_opts, | |
1312 | .bdrv_has_zero_init = bdrv_has_zero_init_1, | |
1313 | .bdrv_has_zero_init_truncate = bdrv_has_zero_init_1, | |
1314 | .bdrv_get_info = qemu_rbd_getinfo, | |
1315 | .create_opts = &qemu_rbd_create_opts, | |
1316 | .bdrv_getlength = qemu_rbd_getlength, | |
1317 | .bdrv_co_truncate = qemu_rbd_co_truncate, | |
1318 | .protocol_name = "rbd", | |
1319 | ||
1320 | .bdrv_aio_preadv = qemu_rbd_aio_preadv, | |
1321 | .bdrv_aio_pwritev = qemu_rbd_aio_pwritev, | |
1322 | ||
1323 | #ifdef LIBRBD_SUPPORTS_AIO_FLUSH | |
1324 | .bdrv_aio_flush = qemu_rbd_aio_flush, | |
1325 | #else | |
1326 | .bdrv_co_flush_to_disk = qemu_rbd_co_flush, | |
1327 | #endif | |
1328 | ||
1329 | #ifdef LIBRBD_SUPPORTS_DISCARD | |
1330 | .bdrv_aio_pdiscard = qemu_rbd_aio_pdiscard, | |
1331 | #endif | |
1332 | ||
1333 | .bdrv_snapshot_create = qemu_rbd_snap_create, | |
1334 | .bdrv_snapshot_delete = qemu_rbd_snap_remove, | |
1335 | .bdrv_snapshot_list = qemu_rbd_snap_list, | |
1336 | .bdrv_snapshot_goto = qemu_rbd_snap_rollback, | |
1337 | #ifdef LIBRBD_SUPPORTS_INVALIDATE | |
1338 | .bdrv_co_invalidate_cache = qemu_rbd_co_invalidate_cache, | |
1339 | #endif | |
1340 | ||
1341 | .strong_runtime_opts = qemu_rbd_strong_runtime_opts, | |
1342 | }; | |
1343 | ||
1344 | static void bdrv_rbd_init(void) | |
1345 | { | |
1346 | bdrv_register(&bdrv_rbd); | |
1347 | } | |
1348 | ||
1349 | block_init(bdrv_rbd_init); |