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Commit | Line | Data |
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f27aaf4b CB |
1 | /* |
2 | * QEMU Block driver for RADOS (Ceph) | |
3 | * | |
ad32e9c0 JD |
4 | * Copyright (C) 2010-2011 Christian Brunner <chb@muc.de>, |
5 | * Josh Durgin <josh.durgin@dreamhost.com> | |
f27aaf4b CB |
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 | * | |
6b620ca3 PB |
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. | |
f27aaf4b CB |
12 | */ |
13 | ||
80c71a24 | 14 | #include "qemu/osdep.h" |
ad32e9c0 | 15 | |
da34e65c | 16 | #include "qapi/error.h" |
1de7afc9 | 17 | #include "qemu/error-report.h" |
737e150e | 18 | #include "block/block_int.h" |
60390a21 | 19 | #include "crypto/secret.h" |
f348b6d1 | 20 | #include "qemu/cutils.h" |
f27aaf4b | 21 | |
ad32e9c0 | 22 | #include <rbd/librbd.h> |
f27aaf4b | 23 | |
f27aaf4b CB |
24 | /* |
25 | * When specifying the image filename use: | |
26 | * | |
fab5cf59 | 27 | * rbd:poolname/devicename[@snapshotname][:option1=value1[:option2=value2...]] |
f27aaf4b | 28 | * |
9e1fbcde | 29 | * poolname must be the name of an existing rados pool. |
f27aaf4b | 30 | * |
9e1fbcde | 31 | * devicename is the name of the rbd image. |
f27aaf4b | 32 | * |
9e1fbcde SW |
33 | * Each option given is used to configure rados, and may be any valid |
34 | * Ceph option, "id", or "conf". | |
fab5cf59 | 35 | * |
9e1fbcde SW |
36 | * The "id" option indicates what user we should authenticate as to |
37 | * the Ceph cluster. If it is excluded we will use the Ceph default | |
38 | * (normally 'admin'). | |
f27aaf4b | 39 | * |
9e1fbcde SW |
40 | * The "conf" option specifies a Ceph configuration file to read. If |
41 | * it is not specified, we will read from the default Ceph locations | |
42 | * (e.g., /etc/ceph/ceph.conf). To avoid reading _any_ configuration | |
43 | * file, specify conf=/dev/null. | |
f27aaf4b | 44 | * |
9e1fbcde SW |
45 | * Configuration values containing :, @, or = can be escaped with a |
46 | * leading "\". | |
f27aaf4b CB |
47 | */ |
48 | ||
787f3133 JD |
49 | /* rbd_aio_discard added in 0.1.2 */ |
50 | #if LIBRBD_VERSION_CODE >= LIBRBD_VERSION(0, 1, 2) | |
51 | #define LIBRBD_SUPPORTS_DISCARD | |
52 | #else | |
53 | #undef LIBRBD_SUPPORTS_DISCARD | |
54 | #endif | |
55 | ||
f27aaf4b CB |
56 | #define OBJ_MAX_SIZE (1UL << OBJ_DEFAULT_OBJ_ORDER) |
57 | ||
ad32e9c0 JD |
58 | #define RBD_MAX_CONF_NAME_SIZE 128 |
59 | #define RBD_MAX_CONF_VAL_SIZE 512 | |
60 | #define RBD_MAX_CONF_SIZE 1024 | |
61 | #define RBD_MAX_POOL_NAME_SIZE 128 | |
62 | #define RBD_MAX_SNAP_NAME_SIZE 128 | |
63 | #define RBD_MAX_SNAPS 100 | |
64 | ||
787f3133 JD |
65 | typedef enum { |
66 | RBD_AIO_READ, | |
67 | RBD_AIO_WRITE, | |
dc7588c1 JD |
68 | RBD_AIO_DISCARD, |
69 | RBD_AIO_FLUSH | |
787f3133 JD |
70 | } RBDAIOCmd; |
71 | ||
f27aaf4b | 72 | typedef struct RBDAIOCB { |
7c84b1b8 | 73 | BlockAIOCB common; |
08448d51 | 74 | int64_t ret; |
f27aaf4b CB |
75 | QEMUIOVector *qiov; |
76 | char *bounce; | |
787f3133 | 77 | RBDAIOCmd cmd; |
f27aaf4b CB |
78 | int error; |
79 | struct BDRVRBDState *s; | |
f27aaf4b CB |
80 | } RBDAIOCB; |
81 | ||
82 | typedef struct RADOSCB { | |
f27aaf4b CB |
83 | RBDAIOCB *acb; |
84 | struct BDRVRBDState *s; | |
ad32e9c0 | 85 | int64_t size; |
f27aaf4b | 86 | char *buf; |
08448d51 | 87 | int64_t ret; |
f27aaf4b CB |
88 | } RADOSCB; |
89 | ||
f27aaf4b | 90 | typedef struct BDRVRBDState { |
ad32e9c0 JD |
91 | rados_t cluster; |
92 | rados_ioctx_t io_ctx; | |
93 | rbd_image_t image; | |
94 | char name[RBD_MAX_IMAGE_NAME_SIZE]; | |
ad32e9c0 | 95 | char *snap; |
f27aaf4b CB |
96 | } BDRVRBDState; |
97 | ||
ad32e9c0 JD |
98 | static int qemu_rbd_next_tok(char *dst, int dst_len, |
99 | char *src, char delim, | |
100 | const char *name, | |
d61563b2 | 101 | char **p, Error **errp) |
f27aaf4b CB |
102 | { |
103 | int l; | |
104 | char *end; | |
105 | ||
106 | *p = NULL; | |
107 | ||
108 | if (delim != '\0') { | |
16a06b24 SW |
109 | for (end = src; *end; ++end) { |
110 | if (*end == delim) { | |
111 | break; | |
112 | } | |
113 | if (*end == '\\' && end[1] != '\0') { | |
114 | end++; | |
115 | } | |
116 | } | |
117 | if (*end == delim) { | |
f27aaf4b CB |
118 | *p = end + 1; |
119 | *end = '\0'; | |
120 | } | |
121 | } | |
122 | l = strlen(src); | |
123 | if (l >= dst_len) { | |
d61563b2 | 124 | error_setg(errp, "%s too long", name); |
f27aaf4b CB |
125 | return -EINVAL; |
126 | } else if (l == 0) { | |
d61563b2 | 127 | error_setg(errp, "%s too short", name); |
f27aaf4b CB |
128 | return -EINVAL; |
129 | } | |
130 | ||
131 | pstrcpy(dst, dst_len, src); | |
132 | ||
133 | return 0; | |
134 | } | |
135 | ||
16a06b24 SW |
136 | static void qemu_rbd_unescape(char *src) |
137 | { | |
138 | char *p; | |
139 | ||
140 | for (p = src; *src; ++src, ++p) { | |
141 | if (*src == '\\' && src[1] != '\0') { | |
142 | src++; | |
143 | } | |
144 | *p = *src; | |
145 | } | |
146 | *p = '\0'; | |
147 | } | |
148 | ||
ad32e9c0 JD |
149 | static int qemu_rbd_parsename(const char *filename, |
150 | char *pool, int pool_len, | |
151 | char *snap, int snap_len, | |
fab5cf59 | 152 | char *name, int name_len, |
d61563b2 MA |
153 | char *conf, int conf_len, |
154 | Error **errp) | |
f27aaf4b CB |
155 | { |
156 | const char *start; | |
157 | char *p, *buf; | |
158 | int ret; | |
159 | ||
160 | if (!strstart(filename, "rbd:", &start)) { | |
d61563b2 | 161 | error_setg(errp, "File name must start with 'rbd:'"); |
f27aaf4b CB |
162 | return -EINVAL; |
163 | } | |
164 | ||
7267c094 | 165 | buf = g_strdup(start); |
f27aaf4b | 166 | p = buf; |
fab5cf59 JD |
167 | *snap = '\0'; |
168 | *conf = '\0'; | |
f27aaf4b | 169 | |
d61563b2 MA |
170 | ret = qemu_rbd_next_tok(pool, pool_len, p, |
171 | '/', "pool name", &p, errp); | |
f27aaf4b CB |
172 | if (ret < 0 || !p) { |
173 | ret = -EINVAL; | |
174 | goto done; | |
175 | } | |
16a06b24 | 176 | qemu_rbd_unescape(pool); |
fab5cf59 JD |
177 | |
178 | if (strchr(p, '@')) { | |
d61563b2 MA |
179 | ret = qemu_rbd_next_tok(name, name_len, p, |
180 | '@', "object name", &p, errp); | |
fab5cf59 JD |
181 | if (ret < 0) { |
182 | goto done; | |
183 | } | |
d61563b2 MA |
184 | ret = qemu_rbd_next_tok(snap, snap_len, p, |
185 | ':', "snap name", &p, errp); | |
16a06b24 | 186 | qemu_rbd_unescape(snap); |
fab5cf59 | 187 | } else { |
d61563b2 MA |
188 | ret = qemu_rbd_next_tok(name, name_len, p, |
189 | ':', "object name", &p, errp); | |
f27aaf4b | 190 | } |
16a06b24 | 191 | qemu_rbd_unescape(name); |
fab5cf59 | 192 | if (ret < 0 || !p) { |
f27aaf4b CB |
193 | goto done; |
194 | } | |
195 | ||
d61563b2 MA |
196 | ret = qemu_rbd_next_tok(conf, conf_len, p, |
197 | '\0', "configuration", &p, errp); | |
f27aaf4b CB |
198 | |
199 | done: | |
7267c094 | 200 | g_free(buf); |
f27aaf4b CB |
201 | return ret; |
202 | } | |
203 | ||
7c7e9df0 SW |
204 | static char *qemu_rbd_parse_clientname(const char *conf, char *clientname) |
205 | { | |
206 | const char *p = conf; | |
207 | ||
208 | while (*p) { | |
209 | int len; | |
210 | const char *end = strchr(p, ':'); | |
211 | ||
212 | if (end) { | |
213 | len = end - p; | |
214 | } else { | |
215 | len = strlen(p); | |
216 | } | |
217 | ||
218 | if (strncmp(p, "id=", 3) == 0) { | |
219 | len -= 3; | |
220 | strncpy(clientname, p + 3, len); | |
221 | clientname[len] = '\0'; | |
222 | return clientname; | |
223 | } | |
224 | if (end == NULL) { | |
225 | break; | |
226 | } | |
227 | p = end + 1; | |
228 | } | |
229 | return NULL; | |
230 | } | |
231 | ||
60390a21 DB |
232 | |
233 | static int qemu_rbd_set_auth(rados_t cluster, const char *secretid, | |
234 | Error **errp) | |
235 | { | |
236 | if (secretid == 0) { | |
237 | return 0; | |
238 | } | |
239 | ||
240 | gchar *secret = qcrypto_secret_lookup_as_base64(secretid, | |
241 | errp); | |
242 | if (!secret) { | |
243 | return -1; | |
244 | } | |
245 | ||
246 | rados_conf_set(cluster, "key", secret); | |
247 | g_free(secret); | |
248 | ||
249 | return 0; | |
250 | } | |
251 | ||
252 | ||
e34d8f29 JD |
253 | static int qemu_rbd_set_conf(rados_t cluster, const char *conf, |
254 | bool only_read_conf_file, | |
255 | Error **errp) | |
fab5cf59 JD |
256 | { |
257 | char *p, *buf; | |
258 | char name[RBD_MAX_CONF_NAME_SIZE]; | |
259 | char value[RBD_MAX_CONF_VAL_SIZE]; | |
260 | int ret = 0; | |
261 | ||
7267c094 | 262 | buf = g_strdup(conf); |
fab5cf59 JD |
263 | p = buf; |
264 | ||
265 | while (p) { | |
266 | ret = qemu_rbd_next_tok(name, sizeof(name), p, | |
d61563b2 | 267 | '=', "conf option name", &p, errp); |
fab5cf59 JD |
268 | if (ret < 0) { |
269 | break; | |
270 | } | |
16a06b24 | 271 | qemu_rbd_unescape(name); |
fab5cf59 JD |
272 | |
273 | if (!p) { | |
d61563b2 | 274 | error_setg(errp, "conf option %s has no value", name); |
fab5cf59 JD |
275 | ret = -EINVAL; |
276 | break; | |
277 | } | |
278 | ||
279 | ret = qemu_rbd_next_tok(value, sizeof(value), p, | |
d61563b2 | 280 | ':', "conf option value", &p, errp); |
fab5cf59 JD |
281 | if (ret < 0) { |
282 | break; | |
283 | } | |
16a06b24 | 284 | qemu_rbd_unescape(value); |
fab5cf59 | 285 | |
7c7e9df0 | 286 | if (strcmp(name, "conf") == 0) { |
e34d8f29 JD |
287 | /* read the conf file alone, so it doesn't override more |
288 | specific settings for a particular device */ | |
289 | if (only_read_conf_file) { | |
290 | ret = rados_conf_read_file(cluster, value); | |
291 | if (ret < 0) { | |
87cd3d20 VU |
292 | error_setg_errno(errp, -ret, "error reading conf file %s", |
293 | value); | |
e34d8f29 JD |
294 | break; |
295 | } | |
fab5cf59 | 296 | } |
7c7e9df0 SW |
297 | } else if (strcmp(name, "id") == 0) { |
298 | /* ignore, this is parsed by qemu_rbd_parse_clientname() */ | |
e34d8f29 | 299 | } else if (!only_read_conf_file) { |
7c7e9df0 | 300 | ret = rados_conf_set(cluster, name, value); |
fab5cf59 | 301 | if (ret < 0) { |
87cd3d20 | 302 | error_setg_errno(errp, -ret, "invalid conf option %s", name); |
7c7e9df0 | 303 | ret = -EINVAL; |
fab5cf59 JD |
304 | break; |
305 | } | |
306 | } | |
307 | } | |
308 | ||
7267c094 | 309 | g_free(buf); |
fab5cf59 JD |
310 | return ret; |
311 | } | |
312 | ||
bd0cf596 | 313 | static int qemu_rbd_create(const char *filename, QemuOpts *opts, Error **errp) |
f27aaf4b | 314 | { |
d61563b2 | 315 | Error *local_err = NULL; |
f27aaf4b CB |
316 | int64_t bytes = 0; |
317 | int64_t objsize; | |
ad32e9c0 JD |
318 | int obj_order = 0; |
319 | char pool[RBD_MAX_POOL_NAME_SIZE]; | |
320 | char name[RBD_MAX_IMAGE_NAME_SIZE]; | |
321 | char snap_buf[RBD_MAX_SNAP_NAME_SIZE]; | |
fab5cf59 | 322 | char conf[RBD_MAX_CONF_SIZE]; |
7c7e9df0 SW |
323 | char clientname_buf[RBD_MAX_CONF_SIZE]; |
324 | char *clientname; | |
60390a21 | 325 | const char *secretid; |
ad32e9c0 JD |
326 | rados_t cluster; |
327 | rados_ioctx_t io_ctx; | |
f27aaf4b CB |
328 | int ret; |
329 | ||
60390a21 DB |
330 | secretid = qemu_opt_get(opts, "password-secret"); |
331 | ||
ad32e9c0 JD |
332 | if (qemu_rbd_parsename(filename, pool, sizeof(pool), |
333 | snap_buf, sizeof(snap_buf), | |
fab5cf59 | 334 | name, sizeof(name), |
d61563b2 MA |
335 | conf, sizeof(conf), &local_err) < 0) { |
336 | error_propagate(errp, local_err); | |
f27aaf4b CB |
337 | return -EINVAL; |
338 | } | |
f27aaf4b | 339 | |
f27aaf4b | 340 | /* Read out options */ |
c2eb918e HT |
341 | bytes = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), |
342 | BDRV_SECTOR_SIZE); | |
bd0cf596 CL |
343 | objsize = qemu_opt_get_size_del(opts, BLOCK_OPT_CLUSTER_SIZE, 0); |
344 | if (objsize) { | |
345 | if ((objsize - 1) & objsize) { /* not a power of 2? */ | |
346 | error_setg(errp, "obj size needs to be power of 2"); | |
347 | return -EINVAL; | |
348 | } | |
349 | if (objsize < 4096) { | |
350 | error_setg(errp, "obj size too small"); | |
351 | return -EINVAL; | |
f27aaf4b | 352 | } |
786a4ea8 | 353 | obj_order = ctz32(objsize); |
f27aaf4b CB |
354 | } |
355 | ||
7c7e9df0 | 356 | clientname = qemu_rbd_parse_clientname(conf, clientname_buf); |
87cd3d20 VU |
357 | ret = rados_create(&cluster, clientname); |
358 | if (ret < 0) { | |
359 | error_setg_errno(errp, -ret, "error initializing"); | |
360 | return ret; | |
f27aaf4b CB |
361 | } |
362 | ||
fab5cf59 | 363 | if (strstr(conf, "conf=") == NULL) { |
f9fe18ec SW |
364 | /* try default location, but ignore failure */ |
365 | rados_conf_read_file(cluster, NULL); | |
e34d8f29 JD |
366 | } else if (conf[0] != '\0' && |
367 | qemu_rbd_set_conf(cluster, conf, true, &local_err) < 0) { | |
368 | rados_shutdown(cluster); | |
369 | error_propagate(errp, local_err); | |
370 | return -EIO; | |
fab5cf59 JD |
371 | } |
372 | ||
373 | if (conf[0] != '\0' && | |
e34d8f29 | 374 | qemu_rbd_set_conf(cluster, conf, false, &local_err) < 0) { |
ad32e9c0 | 375 | rados_shutdown(cluster); |
d61563b2 | 376 | error_propagate(errp, local_err); |
f27aaf4b CB |
377 | return -EIO; |
378 | } | |
379 | ||
60390a21 DB |
380 | if (qemu_rbd_set_auth(cluster, secretid, errp) < 0) { |
381 | rados_shutdown(cluster); | |
382 | return -EIO; | |
383 | } | |
384 | ||
87cd3d20 VU |
385 | ret = rados_connect(cluster); |
386 | if (ret < 0) { | |
387 | error_setg_errno(errp, -ret, "error connecting"); | |
ad32e9c0 | 388 | rados_shutdown(cluster); |
87cd3d20 | 389 | return ret; |
f27aaf4b | 390 | } |
f27aaf4b | 391 | |
87cd3d20 VU |
392 | ret = rados_ioctx_create(cluster, pool, &io_ctx); |
393 | if (ret < 0) { | |
394 | error_setg_errno(errp, -ret, "error opening pool %s", pool); | |
ad32e9c0 | 395 | rados_shutdown(cluster); |
87cd3d20 | 396 | return ret; |
f27aaf4b CB |
397 | } |
398 | ||
ad32e9c0 JD |
399 | ret = rbd_create(io_ctx, name, bytes, &obj_order); |
400 | rados_ioctx_destroy(io_ctx); | |
401 | rados_shutdown(cluster); | |
87cd3d20 VU |
402 | if (ret < 0) { |
403 | error_setg_errno(errp, -ret, "error rbd create"); | |
404 | return ret; | |
405 | } | |
f27aaf4b CB |
406 | |
407 | return ret; | |
408 | } | |
409 | ||
410 | /* | |
e04fb07f SH |
411 | * This aio completion is being called from rbd_finish_bh() and runs in qemu |
412 | * BH context. | |
f27aaf4b | 413 | */ |
ad32e9c0 | 414 | static void qemu_rbd_complete_aio(RADOSCB *rcb) |
f27aaf4b CB |
415 | { |
416 | RBDAIOCB *acb = rcb->acb; | |
417 | int64_t r; | |
418 | ||
f27aaf4b CB |
419 | r = rcb->ret; |
420 | ||
dc7588c1 | 421 | if (acb->cmd != RBD_AIO_READ) { |
f27aaf4b CB |
422 | if (r < 0) { |
423 | acb->ret = r; | |
424 | acb->error = 1; | |
425 | } else if (!acb->error) { | |
ad32e9c0 | 426 | acb->ret = rcb->size; |
f27aaf4b CB |
427 | } |
428 | } else { | |
ad32e9c0 JD |
429 | if (r < 0) { |
430 | memset(rcb->buf, 0, rcb->size); | |
f27aaf4b CB |
431 | acb->ret = r; |
432 | acb->error = 1; | |
ad32e9c0 JD |
433 | } else if (r < rcb->size) { |
434 | memset(rcb->buf + r, 0, rcb->size - r); | |
f27aaf4b | 435 | if (!acb->error) { |
ad32e9c0 | 436 | acb->ret = rcb->size; |
f27aaf4b CB |
437 | } |
438 | } else if (!acb->error) { | |
ad32e9c0 | 439 | acb->ret = r; |
f27aaf4b CB |
440 | } |
441 | } | |
f27aaf4b | 442 | |
e04fb07f | 443 | g_free(rcb); |
f27aaf4b | 444 | |
e04fb07f SH |
445 | if (acb->cmd == RBD_AIO_READ) { |
446 | qemu_iovec_from_buf(acb->qiov, 0, acb->bounce, acb->qiov->size); | |
447 | } | |
448 | qemu_vfree(acb->bounce); | |
449 | acb->common.cb(acb->common.opaque, (acb->ret > 0 ? 0 : acb->ret)); | |
f27aaf4b | 450 | |
8007429a | 451 | qemu_aio_unref(acb); |
f27aaf4b CB |
452 | } |
453 | ||
a9ccedc3 KW |
454 | /* TODO Convert to fine grained options */ |
455 | static QemuOptsList runtime_opts = { | |
456 | .name = "rbd", | |
457 | .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), | |
458 | .desc = { | |
459 | { | |
460 | .name = "filename", | |
461 | .type = QEMU_OPT_STRING, | |
462 | .help = "Specification of the rbd image", | |
463 | }, | |
60390a21 DB |
464 | { |
465 | .name = "password-secret", | |
466 | .type = QEMU_OPT_STRING, | |
467 | .help = "ID of secret providing the password", | |
468 | }, | |
a9ccedc3 KW |
469 | { /* end of list */ } |
470 | }, | |
471 | }; | |
472 | ||
015a1036 HR |
473 | static int qemu_rbd_open(BlockDriverState *bs, QDict *options, int flags, |
474 | Error **errp) | |
f27aaf4b CB |
475 | { |
476 | BDRVRBDState *s = bs->opaque; | |
ad32e9c0 JD |
477 | char pool[RBD_MAX_POOL_NAME_SIZE]; |
478 | char snap_buf[RBD_MAX_SNAP_NAME_SIZE]; | |
fab5cf59 | 479 | char conf[RBD_MAX_CONF_SIZE]; |
7c7e9df0 SW |
480 | char clientname_buf[RBD_MAX_CONF_SIZE]; |
481 | char *clientname; | |
60390a21 | 482 | const char *secretid; |
a9ccedc3 KW |
483 | QemuOpts *opts; |
484 | Error *local_err = NULL; | |
485 | const char *filename; | |
f27aaf4b CB |
486 | int r; |
487 | ||
87ea75d5 | 488 | opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort); |
a9ccedc3 | 489 | qemu_opts_absorb_qdict(opts, options, &local_err); |
84d18f06 | 490 | if (local_err) { |
d61563b2 | 491 | error_propagate(errp, local_err); |
a9ccedc3 KW |
492 | qemu_opts_del(opts); |
493 | return -EINVAL; | |
494 | } | |
495 | ||
496 | filename = qemu_opt_get(opts, "filename"); | |
60390a21 | 497 | secretid = qemu_opt_get(opts, "password-secret"); |
a9ccedc3 | 498 | |
ad32e9c0 JD |
499 | if (qemu_rbd_parsename(filename, pool, sizeof(pool), |
500 | snap_buf, sizeof(snap_buf), | |
fab5cf59 | 501 | s->name, sizeof(s->name), |
d61563b2 | 502 | conf, sizeof(conf), errp) < 0) { |
c3ca988d KW |
503 | r = -EINVAL; |
504 | goto failed_opts; | |
f27aaf4b | 505 | } |
f27aaf4b | 506 | |
7c7e9df0 SW |
507 | clientname = qemu_rbd_parse_clientname(conf, clientname_buf); |
508 | r = rados_create(&s->cluster, clientname); | |
ad32e9c0 | 509 | if (r < 0) { |
87cd3d20 | 510 | error_setg_errno(errp, -r, "error initializing"); |
c3ca988d | 511 | goto failed_opts; |
f27aaf4b CB |
512 | } |
513 | ||
eb93d5d9 SW |
514 | s->snap = NULL; |
515 | if (snap_buf[0] != '\0') { | |
516 | s->snap = g_strdup(snap_buf); | |
517 | } | |
518 | ||
99a3c89d JD |
519 | if (strstr(conf, "conf=") == NULL) { |
520 | /* try default location, but ignore failure */ | |
521 | rados_conf_read_file(s->cluster, NULL); | |
e34d8f29 JD |
522 | } else if (conf[0] != '\0') { |
523 | r = qemu_rbd_set_conf(s->cluster, conf, true, errp); | |
524 | if (r < 0) { | |
525 | goto failed_shutdown; | |
526 | } | |
99a3c89d JD |
527 | } |
528 | ||
529 | if (conf[0] != '\0') { | |
e34d8f29 | 530 | r = qemu_rbd_set_conf(s->cluster, conf, false, errp); |
99a3c89d JD |
531 | if (r < 0) { |
532 | goto failed_shutdown; | |
533 | } | |
534 | } | |
535 | ||
60390a21 DB |
536 | if (qemu_rbd_set_auth(s->cluster, secretid, errp) < 0) { |
537 | r = -EIO; | |
538 | goto failed_shutdown; | |
539 | } | |
540 | ||
b11f38fc JD |
541 | /* |
542 | * Fallback to more conservative semantics if setting cache | |
543 | * options fails. Ignore errors from setting rbd_cache because the | |
544 | * only possible error is that the option does not exist, and | |
545 | * librbd defaults to no caching. If write through caching cannot | |
546 | * be set up, fall back to no caching. | |
547 | */ | |
548 | if (flags & BDRV_O_NOCACHE) { | |
549 | rados_conf_set(s->cluster, "rbd_cache", "false"); | |
550 | } else { | |
551 | rados_conf_set(s->cluster, "rbd_cache", "true"); | |
b11f38fc JD |
552 | } |
553 | ||
ad32e9c0 JD |
554 | r = rados_connect(s->cluster); |
555 | if (r < 0) { | |
87cd3d20 | 556 | error_setg_errno(errp, -r, "error connecting"); |
eb93d5d9 | 557 | goto failed_shutdown; |
f27aaf4b CB |
558 | } |
559 | ||
ad32e9c0 JD |
560 | r = rados_ioctx_create(s->cluster, pool, &s->io_ctx); |
561 | if (r < 0) { | |
87cd3d20 | 562 | error_setg_errno(errp, -r, "error opening pool %s", pool); |
eb93d5d9 | 563 | goto failed_shutdown; |
f27aaf4b CB |
564 | } |
565 | ||
ad32e9c0 | 566 | r = rbd_open(s->io_ctx, s->name, &s->image, s->snap); |
f27aaf4b | 567 | if (r < 0) { |
87cd3d20 | 568 | error_setg_errno(errp, -r, "error reading header from %s", s->name); |
eb93d5d9 | 569 | goto failed_open; |
f27aaf4b CB |
570 | } |
571 | ||
ad32e9c0 | 572 | bs->read_only = (s->snap != NULL); |
f27aaf4b | 573 | |
c3ca988d | 574 | qemu_opts_del(opts); |
f27aaf4b CB |
575 | return 0; |
576 | ||
eb93d5d9 | 577 | failed_open: |
ad32e9c0 | 578 | rados_ioctx_destroy(s->io_ctx); |
eb93d5d9 | 579 | failed_shutdown: |
ad32e9c0 | 580 | rados_shutdown(s->cluster); |
eb93d5d9 | 581 | g_free(s->snap); |
c3ca988d KW |
582 | failed_opts: |
583 | qemu_opts_del(opts); | |
f27aaf4b CB |
584 | return r; |
585 | } | |
586 | ||
ad32e9c0 | 587 | static void qemu_rbd_close(BlockDriverState *bs) |
f27aaf4b CB |
588 | { |
589 | BDRVRBDState *s = bs->opaque; | |
590 | ||
ad32e9c0 JD |
591 | rbd_close(s->image); |
592 | rados_ioctx_destroy(s->io_ctx); | |
7267c094 | 593 | g_free(s->snap); |
ad32e9c0 | 594 | rados_shutdown(s->cluster); |
f27aaf4b CB |
595 | } |
596 | ||
d7331bed | 597 | static const AIOCBInfo rbd_aiocb_info = { |
f27aaf4b | 598 | .aiocb_size = sizeof(RBDAIOCB), |
f27aaf4b CB |
599 | }; |
600 | ||
e04fb07f | 601 | static void rbd_finish_bh(void *opaque) |
f27aaf4b | 602 | { |
e04fb07f | 603 | RADOSCB *rcb = opaque; |
e04fb07f | 604 | qemu_rbd_complete_aio(rcb); |
ad32e9c0 JD |
605 | } |
606 | ||
607 | /* | |
608 | * This is the callback function for rbd_aio_read and _write | |
609 | * | |
610 | * Note: this function is being called from a non qemu thread so | |
611 | * we need to be careful about what we do here. Generally we only | |
e04fb07f SH |
612 | * schedule a BH, and do the rest of the io completion handling |
613 | * from rbd_finish_bh() which runs in a qemu context. | |
ad32e9c0 JD |
614 | */ |
615 | static void rbd_finish_aiocb(rbd_completion_t c, RADOSCB *rcb) | |
616 | { | |
e04fb07f SH |
617 | RBDAIOCB *acb = rcb->acb; |
618 | ||
ad32e9c0 JD |
619 | rcb->ret = rbd_aio_get_return_value(c); |
620 | rbd_aio_release(c); | |
f27aaf4b | 621 | |
fffb6e12 PB |
622 | aio_bh_schedule_oneshot(bdrv_get_aio_context(acb->common.bs), |
623 | rbd_finish_bh, rcb); | |
f27aaf4b CB |
624 | } |
625 | ||
787f3133 JD |
626 | static int rbd_aio_discard_wrapper(rbd_image_t image, |
627 | uint64_t off, | |
628 | uint64_t len, | |
629 | rbd_completion_t comp) | |
630 | { | |
631 | #ifdef LIBRBD_SUPPORTS_DISCARD | |
632 | return rbd_aio_discard(image, off, len, comp); | |
633 | #else | |
634 | return -ENOTSUP; | |
635 | #endif | |
636 | } | |
637 | ||
dc7588c1 JD |
638 | static int rbd_aio_flush_wrapper(rbd_image_t image, |
639 | rbd_completion_t comp) | |
640 | { | |
641 | #ifdef LIBRBD_SUPPORTS_AIO_FLUSH | |
642 | return rbd_aio_flush(image, comp); | |
643 | #else | |
644 | return -ENOTSUP; | |
645 | #endif | |
646 | } | |
647 | ||
7c84b1b8 | 648 | static BlockAIOCB *rbd_start_aio(BlockDriverState *bs, |
7bbca9e2 | 649 | int64_t off, |
7c84b1b8 | 650 | QEMUIOVector *qiov, |
7bbca9e2 | 651 | int64_t size, |
097310b5 | 652 | BlockCompletionFunc *cb, |
7c84b1b8 MA |
653 | void *opaque, |
654 | RBDAIOCmd cmd) | |
f27aaf4b CB |
655 | { |
656 | RBDAIOCB *acb; | |
0f7a0237 | 657 | RADOSCB *rcb = NULL; |
ad32e9c0 | 658 | rbd_completion_t c; |
f27aaf4b | 659 | char *buf; |
51a13528 | 660 | int r; |
f27aaf4b CB |
661 | |
662 | BDRVRBDState *s = bs->opaque; | |
663 | ||
d7331bed | 664 | acb = qemu_aio_get(&rbd_aiocb_info, bs, cb, opaque); |
787f3133 | 665 | acb->cmd = cmd; |
f27aaf4b | 666 | acb->qiov = qiov; |
7bbca9e2 | 667 | assert(!qiov || qiov->size == size); |
dc7588c1 | 668 | if (cmd == RBD_AIO_DISCARD || cmd == RBD_AIO_FLUSH) { |
787f3133 JD |
669 | acb->bounce = NULL; |
670 | } else { | |
0f7a0237 KW |
671 | acb->bounce = qemu_try_blockalign(bs, qiov->size); |
672 | if (acb->bounce == NULL) { | |
673 | goto failed; | |
674 | } | |
787f3133 | 675 | } |
f27aaf4b CB |
676 | acb->ret = 0; |
677 | acb->error = 0; | |
678 | acb->s = s; | |
f27aaf4b | 679 | |
787f3133 | 680 | if (cmd == RBD_AIO_WRITE) { |
d5e6b161 | 681 | qemu_iovec_to_buf(acb->qiov, 0, acb->bounce, qiov->size); |
f27aaf4b CB |
682 | } |
683 | ||
684 | buf = acb->bounce; | |
685 | ||
5839e53b | 686 | rcb = g_new(RADOSCB, 1); |
ad32e9c0 JD |
687 | rcb->acb = acb; |
688 | rcb->buf = buf; | |
689 | rcb->s = acb->s; | |
690 | rcb->size = size; | |
51a13528 JD |
691 | r = rbd_aio_create_completion(rcb, (rbd_callback_t) rbd_finish_aiocb, &c); |
692 | if (r < 0) { | |
693 | goto failed; | |
694 | } | |
f27aaf4b | 695 | |
787f3133 JD |
696 | switch (cmd) { |
697 | case RBD_AIO_WRITE: | |
51a13528 | 698 | r = rbd_aio_write(s->image, off, size, buf, c); |
787f3133 JD |
699 | break; |
700 | case RBD_AIO_READ: | |
51a13528 | 701 | r = rbd_aio_read(s->image, off, size, buf, c); |
787f3133 JD |
702 | break; |
703 | case RBD_AIO_DISCARD: | |
704 | r = rbd_aio_discard_wrapper(s->image, off, size, c); | |
705 | break; | |
dc7588c1 JD |
706 | case RBD_AIO_FLUSH: |
707 | r = rbd_aio_flush_wrapper(s->image, c); | |
708 | break; | |
787f3133 JD |
709 | default: |
710 | r = -EINVAL; | |
51a13528 JD |
711 | } |
712 | ||
713 | if (r < 0) { | |
405a2764 | 714 | goto failed_completion; |
f27aaf4b CB |
715 | } |
716 | ||
717 | return &acb->common; | |
51a13528 | 718 | |
405a2764 KW |
719 | failed_completion: |
720 | rbd_aio_release(c); | |
51a13528 | 721 | failed: |
7267c094 | 722 | g_free(rcb); |
405a2764 | 723 | qemu_vfree(acb->bounce); |
8007429a | 724 | qemu_aio_unref(acb); |
51a13528 | 725 | return NULL; |
f27aaf4b CB |
726 | } |
727 | ||
7c84b1b8 MA |
728 | static BlockAIOCB *qemu_rbd_aio_readv(BlockDriverState *bs, |
729 | int64_t sector_num, | |
730 | QEMUIOVector *qiov, | |
731 | int nb_sectors, | |
097310b5 | 732 | BlockCompletionFunc *cb, |
7c84b1b8 | 733 | void *opaque) |
f27aaf4b | 734 | { |
7bbca9e2 | 735 | return rbd_start_aio(bs, sector_num << BDRV_SECTOR_BITS, qiov, |
e948f663 | 736 | (int64_t) nb_sectors << BDRV_SECTOR_BITS, cb, opaque, |
787f3133 | 737 | RBD_AIO_READ); |
f27aaf4b CB |
738 | } |
739 | ||
7c84b1b8 MA |
740 | static BlockAIOCB *qemu_rbd_aio_writev(BlockDriverState *bs, |
741 | int64_t sector_num, | |
742 | QEMUIOVector *qiov, | |
743 | int nb_sectors, | |
097310b5 | 744 | BlockCompletionFunc *cb, |
7c84b1b8 | 745 | void *opaque) |
f27aaf4b | 746 | { |
7bbca9e2 | 747 | return rbd_start_aio(bs, sector_num << BDRV_SECTOR_BITS, qiov, |
e948f663 | 748 | (int64_t) nb_sectors << BDRV_SECTOR_BITS, cb, opaque, |
787f3133 | 749 | RBD_AIO_WRITE); |
f27aaf4b CB |
750 | } |
751 | ||
dc7588c1 | 752 | #ifdef LIBRBD_SUPPORTS_AIO_FLUSH |
7c84b1b8 | 753 | static BlockAIOCB *qemu_rbd_aio_flush(BlockDriverState *bs, |
097310b5 | 754 | BlockCompletionFunc *cb, |
7c84b1b8 | 755 | void *opaque) |
dc7588c1 JD |
756 | { |
757 | return rbd_start_aio(bs, 0, NULL, 0, cb, opaque, RBD_AIO_FLUSH); | |
758 | } | |
759 | ||
760 | #else | |
761 | ||
8b94ff85 | 762 | static int qemu_rbd_co_flush(BlockDriverState *bs) |
7a3f5fe9 SW |
763 | { |
764 | #if LIBRBD_VERSION_CODE >= LIBRBD_VERSION(0, 1, 1) | |
765 | /* rbd_flush added in 0.1.1 */ | |
766 | BDRVRBDState *s = bs->opaque; | |
767 | return rbd_flush(s->image); | |
768 | #else | |
769 | return 0; | |
770 | #endif | |
771 | } | |
dc7588c1 | 772 | #endif |
7a3f5fe9 | 773 | |
ad32e9c0 | 774 | static int qemu_rbd_getinfo(BlockDriverState *bs, BlockDriverInfo *bdi) |
f27aaf4b CB |
775 | { |
776 | BDRVRBDState *s = bs->opaque; | |
ad32e9c0 JD |
777 | rbd_image_info_t info; |
778 | int r; | |
779 | ||
780 | r = rbd_stat(s->image, &info, sizeof(info)); | |
781 | if (r < 0) { | |
782 | return r; | |
783 | } | |
784 | ||
785 | bdi->cluster_size = info.obj_size; | |
f27aaf4b CB |
786 | return 0; |
787 | } | |
788 | ||
ad32e9c0 | 789 | static int64_t qemu_rbd_getlength(BlockDriverState *bs) |
f27aaf4b CB |
790 | { |
791 | BDRVRBDState *s = bs->opaque; | |
ad32e9c0 JD |
792 | rbd_image_info_t info; |
793 | int r; | |
f27aaf4b | 794 | |
ad32e9c0 JD |
795 | r = rbd_stat(s->image, &info, sizeof(info)); |
796 | if (r < 0) { | |
797 | return r; | |
798 | } | |
799 | ||
800 | return info.size; | |
f27aaf4b CB |
801 | } |
802 | ||
30cdc48c JD |
803 | static int qemu_rbd_truncate(BlockDriverState *bs, int64_t offset) |
804 | { | |
805 | BDRVRBDState *s = bs->opaque; | |
806 | int r; | |
807 | ||
808 | r = rbd_resize(s->image, offset); | |
809 | if (r < 0) { | |
810 | return r; | |
811 | } | |
812 | ||
813 | return 0; | |
814 | } | |
815 | ||
ad32e9c0 JD |
816 | static int qemu_rbd_snap_create(BlockDriverState *bs, |
817 | QEMUSnapshotInfo *sn_info) | |
f27aaf4b CB |
818 | { |
819 | BDRVRBDState *s = bs->opaque; | |
f27aaf4b | 820 | int r; |
f27aaf4b CB |
821 | |
822 | if (sn_info->name[0] == '\0') { | |
823 | return -EINVAL; /* we need a name for rbd snapshots */ | |
824 | } | |
825 | ||
826 | /* | |
827 | * rbd snapshots are using the name as the user controlled unique identifier | |
828 | * we can't use the rbd snapid for that purpose, as it can't be set | |
829 | */ | |
830 | if (sn_info->id_str[0] != '\0' && | |
831 | strcmp(sn_info->id_str, sn_info->name) != 0) { | |
832 | return -EINVAL; | |
833 | } | |
834 | ||
835 | if (strlen(sn_info->name) >= sizeof(sn_info->id_str)) { | |
836 | return -ERANGE; | |
837 | } | |
838 | ||
ad32e9c0 | 839 | r = rbd_snap_create(s->image, sn_info->name); |
f27aaf4b | 840 | if (r < 0) { |
ad32e9c0 | 841 | error_report("failed to create snap: %s", strerror(-r)); |
f27aaf4b CB |
842 | return r; |
843 | } | |
844 | ||
f27aaf4b CB |
845 | return 0; |
846 | } | |
847 | ||
bd603247 | 848 | static int qemu_rbd_snap_remove(BlockDriverState *bs, |
a89d89d3 WX |
849 | const char *snapshot_id, |
850 | const char *snapshot_name, | |
851 | Error **errp) | |
bd603247 GF |
852 | { |
853 | BDRVRBDState *s = bs->opaque; | |
854 | int r; | |
855 | ||
a89d89d3 WX |
856 | if (!snapshot_name) { |
857 | error_setg(errp, "rbd need a valid snapshot name"); | |
858 | return -EINVAL; | |
859 | } | |
860 | ||
861 | /* If snapshot_id is specified, it must be equal to name, see | |
862 | qemu_rbd_snap_list() */ | |
863 | if (snapshot_id && strcmp(snapshot_id, snapshot_name)) { | |
864 | error_setg(errp, | |
865 | "rbd do not support snapshot id, it should be NULL or " | |
866 | "equal to snapshot name"); | |
867 | return -EINVAL; | |
868 | } | |
869 | ||
bd603247 | 870 | r = rbd_snap_remove(s->image, snapshot_name); |
a89d89d3 WX |
871 | if (r < 0) { |
872 | error_setg_errno(errp, -r, "Failed to remove the snapshot"); | |
873 | } | |
bd603247 GF |
874 | return r; |
875 | } | |
876 | ||
877 | static int qemu_rbd_snap_rollback(BlockDriverState *bs, | |
878 | const char *snapshot_name) | |
879 | { | |
880 | BDRVRBDState *s = bs->opaque; | |
bd603247 | 881 | |
9be38598 | 882 | return rbd_snap_rollback(s->image, snapshot_name); |
bd603247 GF |
883 | } |
884 | ||
ad32e9c0 JD |
885 | static int qemu_rbd_snap_list(BlockDriverState *bs, |
886 | QEMUSnapshotInfo **psn_tab) | |
f27aaf4b CB |
887 | { |
888 | BDRVRBDState *s = bs->opaque; | |
f27aaf4b | 889 | QEMUSnapshotInfo *sn_info, *sn_tab = NULL; |
ad32e9c0 JD |
890 | int i, snap_count; |
891 | rbd_snap_info_t *snaps; | |
892 | int max_snaps = RBD_MAX_SNAPS; | |
f27aaf4b | 893 | |
ad32e9c0 | 894 | do { |
02c4f26b | 895 | snaps = g_new(rbd_snap_info_t, max_snaps); |
ad32e9c0 | 896 | snap_count = rbd_snap_list(s->image, snaps, &max_snaps); |
9e6337d0 | 897 | if (snap_count <= 0) { |
7267c094 | 898 | g_free(snaps); |
f27aaf4b | 899 | } |
ad32e9c0 | 900 | } while (snap_count == -ERANGE); |
f27aaf4b | 901 | |
ad32e9c0 | 902 | if (snap_count <= 0) { |
b9c53290 | 903 | goto done; |
f27aaf4b CB |
904 | } |
905 | ||
5839e53b | 906 | sn_tab = g_new0(QEMUSnapshotInfo, snap_count); |
f27aaf4b | 907 | |
ad32e9c0 JD |
908 | for (i = 0; i < snap_count; i++) { |
909 | const char *snap_name = snaps[i].name; | |
f27aaf4b CB |
910 | |
911 | sn_info = sn_tab + i; | |
912 | pstrcpy(sn_info->id_str, sizeof(sn_info->id_str), snap_name); | |
913 | pstrcpy(sn_info->name, sizeof(sn_info->name), snap_name); | |
f27aaf4b | 914 | |
ad32e9c0 | 915 | sn_info->vm_state_size = snaps[i].size; |
f27aaf4b CB |
916 | sn_info->date_sec = 0; |
917 | sn_info->date_nsec = 0; | |
918 | sn_info->vm_clock_nsec = 0; | |
919 | } | |
ad32e9c0 | 920 | rbd_snap_list_end(snaps); |
9e6337d0 | 921 | g_free(snaps); |
ad32e9c0 | 922 | |
b9c53290 | 923 | done: |
f27aaf4b | 924 | *psn_tab = sn_tab; |
f27aaf4b | 925 | return snap_count; |
f27aaf4b CB |
926 | } |
927 | ||
787f3133 | 928 | #ifdef LIBRBD_SUPPORTS_DISCARD |
4da444a0 EB |
929 | static BlockAIOCB *qemu_rbd_aio_pdiscard(BlockDriverState *bs, |
930 | int64_t offset, | |
931 | int count, | |
932 | BlockCompletionFunc *cb, | |
933 | void *opaque) | |
787f3133 | 934 | { |
4da444a0 | 935 | return rbd_start_aio(bs, offset, NULL, count, cb, opaque, |
787f3133 JD |
936 | RBD_AIO_DISCARD); |
937 | } | |
938 | #endif | |
939 | ||
be217884 AC |
940 | #ifdef LIBRBD_SUPPORTS_INVALIDATE |
941 | static void qemu_rbd_invalidate_cache(BlockDriverState *bs, | |
942 | Error **errp) | |
943 | { | |
944 | BDRVRBDState *s = bs->opaque; | |
945 | int r = rbd_invalidate_cache(s->image); | |
946 | if (r < 0) { | |
947 | error_setg_errno(errp, -r, "Failed to invalidate the cache"); | |
948 | } | |
949 | } | |
950 | #endif | |
951 | ||
bd0cf596 CL |
952 | static QemuOptsList qemu_rbd_create_opts = { |
953 | .name = "rbd-create-opts", | |
954 | .head = QTAILQ_HEAD_INITIALIZER(qemu_rbd_create_opts.head), | |
955 | .desc = { | |
956 | { | |
957 | .name = BLOCK_OPT_SIZE, | |
958 | .type = QEMU_OPT_SIZE, | |
959 | .help = "Virtual disk size" | |
960 | }, | |
961 | { | |
962 | .name = BLOCK_OPT_CLUSTER_SIZE, | |
963 | .type = QEMU_OPT_SIZE, | |
964 | .help = "RBD object size" | |
965 | }, | |
60390a21 DB |
966 | { |
967 | .name = "password-secret", | |
968 | .type = QEMU_OPT_STRING, | |
969 | .help = "ID of secret providing the password", | |
970 | }, | |
bd0cf596 CL |
971 | { /* end of list */ } |
972 | } | |
f27aaf4b CB |
973 | }; |
974 | ||
975 | static BlockDriver bdrv_rbd = { | |
976 | .format_name = "rbd", | |
977 | .instance_size = sizeof(BDRVRBDState), | |
030be321 | 978 | .bdrv_needs_filename = true, |
ad32e9c0 JD |
979 | .bdrv_file_open = qemu_rbd_open, |
980 | .bdrv_close = qemu_rbd_close, | |
c282e1fd | 981 | .bdrv_create = qemu_rbd_create, |
3ac21627 | 982 | .bdrv_has_zero_init = bdrv_has_zero_init_1, |
ad32e9c0 | 983 | .bdrv_get_info = qemu_rbd_getinfo, |
bd0cf596 | 984 | .create_opts = &qemu_rbd_create_opts, |
ad32e9c0 | 985 | .bdrv_getlength = qemu_rbd_getlength, |
30cdc48c | 986 | .bdrv_truncate = qemu_rbd_truncate, |
f27aaf4b CB |
987 | .protocol_name = "rbd", |
988 | ||
c68b89ac KW |
989 | .bdrv_aio_readv = qemu_rbd_aio_readv, |
990 | .bdrv_aio_writev = qemu_rbd_aio_writev, | |
dc7588c1 JD |
991 | |
992 | #ifdef LIBRBD_SUPPORTS_AIO_FLUSH | |
993 | .bdrv_aio_flush = qemu_rbd_aio_flush, | |
994 | #else | |
c68b89ac | 995 | .bdrv_co_flush_to_disk = qemu_rbd_co_flush, |
dc7588c1 | 996 | #endif |
f27aaf4b | 997 | |
787f3133 | 998 | #ifdef LIBRBD_SUPPORTS_DISCARD |
4da444a0 | 999 | .bdrv_aio_pdiscard = qemu_rbd_aio_pdiscard, |
787f3133 JD |
1000 | #endif |
1001 | ||
c68b89ac | 1002 | .bdrv_snapshot_create = qemu_rbd_snap_create, |
bd603247 | 1003 | .bdrv_snapshot_delete = qemu_rbd_snap_remove, |
c68b89ac | 1004 | .bdrv_snapshot_list = qemu_rbd_snap_list, |
bd603247 | 1005 | .bdrv_snapshot_goto = qemu_rbd_snap_rollback, |
be217884 AC |
1006 | #ifdef LIBRBD_SUPPORTS_INVALIDATE |
1007 | .bdrv_invalidate_cache = qemu_rbd_invalidate_cache, | |
1008 | #endif | |
f27aaf4b CB |
1009 | }; |
1010 | ||
1011 | static void bdrv_rbd_init(void) | |
1012 | { | |
1013 | bdrv_register(&bdrv_rbd); | |
1014 | } | |
1015 | ||
1016 | block_init(bdrv_rbd_init); |