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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 | |
2836284d | 16 | #include <rbd/librbd.h> |
da34e65c | 17 | #include "qapi/error.h" |
1de7afc9 | 18 | #include "qemu/error-report.h" |
922a01a0 | 19 | #include "qemu/option.h" |
737e150e | 20 | #include "block/block_int.h" |
60390a21 | 21 | #include "crypto/secret.h" |
f348b6d1 | 22 | #include "qemu/cutils.h" |
c7cacb3e | 23 | #include "qapi/qmp/qstring.h" |
452fcdbc | 24 | #include "qapi/qmp/qdict.h" |
e98c6961 | 25 | #include "qapi/qmp/qjson.h" |
47e6b297 | 26 | #include "qapi/qmp/qlist.h" |
4bfb2741 KW |
27 | #include "qapi/qobject-input-visitor.h" |
28 | #include "qapi/qapi-visit-block-core.h" | |
f27aaf4b | 29 | |
f27aaf4b CB |
30 | /* |
31 | * When specifying the image filename use: | |
32 | * | |
fab5cf59 | 33 | * rbd:poolname/devicename[@snapshotname][:option1=value1[:option2=value2...]] |
f27aaf4b | 34 | * |
9e1fbcde | 35 | * poolname must be the name of an existing rados pool. |
f27aaf4b | 36 | * |
9e1fbcde | 37 | * devicename is the name of the rbd image. |
f27aaf4b | 38 | * |
9e1fbcde SW |
39 | * Each option given is used to configure rados, and may be any valid |
40 | * Ceph option, "id", or "conf". | |
fab5cf59 | 41 | * |
9e1fbcde SW |
42 | * The "id" option indicates what user we should authenticate as to |
43 | * the Ceph cluster. If it is excluded we will use the Ceph default | |
44 | * (normally 'admin'). | |
f27aaf4b | 45 | * |
9e1fbcde SW |
46 | * The "conf" option specifies a Ceph configuration file to read. If |
47 | * it is not specified, we will read from the default Ceph locations | |
48 | * (e.g., /etc/ceph/ceph.conf). To avoid reading _any_ configuration | |
49 | * file, specify conf=/dev/null. | |
f27aaf4b | 50 | * |
9e1fbcde SW |
51 | * Configuration values containing :, @, or = can be escaped with a |
52 | * leading "\". | |
f27aaf4b CB |
53 | */ |
54 | ||
787f3133 JD |
55 | /* rbd_aio_discard added in 0.1.2 */ |
56 | #if LIBRBD_VERSION_CODE >= LIBRBD_VERSION(0, 1, 2) | |
57 | #define LIBRBD_SUPPORTS_DISCARD | |
58 | #else | |
59 | #undef LIBRBD_SUPPORTS_DISCARD | |
60 | #endif | |
61 | ||
f27aaf4b CB |
62 | #define OBJ_MAX_SIZE (1UL << OBJ_DEFAULT_OBJ_ORDER) |
63 | ||
ad32e9c0 JD |
64 | #define RBD_MAX_SNAPS 100 |
65 | ||
1d393bde | 66 | /* The LIBRBD_SUPPORTS_IOVEC is defined in librbd.h */ |
67 | #ifdef LIBRBD_SUPPORTS_IOVEC | |
68 | #define LIBRBD_USE_IOVEC 1 | |
69 | #else | |
70 | #define LIBRBD_USE_IOVEC 0 | |
71 | #endif | |
72 | ||
787f3133 JD |
73 | typedef enum { |
74 | RBD_AIO_READ, | |
75 | RBD_AIO_WRITE, | |
dc7588c1 JD |
76 | RBD_AIO_DISCARD, |
77 | RBD_AIO_FLUSH | |
787f3133 JD |
78 | } RBDAIOCmd; |
79 | ||
f27aaf4b | 80 | typedef struct RBDAIOCB { |
7c84b1b8 | 81 | BlockAIOCB common; |
08448d51 | 82 | int64_t ret; |
f27aaf4b CB |
83 | QEMUIOVector *qiov; |
84 | char *bounce; | |
787f3133 | 85 | RBDAIOCmd cmd; |
f27aaf4b CB |
86 | int error; |
87 | struct BDRVRBDState *s; | |
f27aaf4b CB |
88 | } RBDAIOCB; |
89 | ||
90 | typedef struct RADOSCB { | |
f27aaf4b CB |
91 | RBDAIOCB *acb; |
92 | struct BDRVRBDState *s; | |
ad32e9c0 | 93 | int64_t size; |
f27aaf4b | 94 | char *buf; |
08448d51 | 95 | int64_t ret; |
f27aaf4b CB |
96 | } RADOSCB; |
97 | ||
f27aaf4b | 98 | typedef struct BDRVRBDState { |
ad32e9c0 JD |
99 | rados_t cluster; |
100 | rados_ioctx_t io_ctx; | |
101 | rbd_image_t image; | |
80b61a27 | 102 | char *image_name; |
ad32e9c0 | 103 | char *snap; |
f27aaf4b CB |
104 | } BDRVRBDState; |
105 | ||
aa045c2d KW |
106 | static int qemu_rbd_connect(rados_t *cluster, rados_ioctx_t *io_ctx, |
107 | BlockdevOptionsRbd *opts, bool cache, | |
108 | const char *keypairs, const char *secretid, | |
109 | Error **errp); | |
110 | ||
730b00bb | 111 | static char *qemu_rbd_next_tok(char *src, char delim, char **p) |
f27aaf4b | 112 | { |
f27aaf4b CB |
113 | char *end; |
114 | ||
115 | *p = NULL; | |
116 | ||
8efb339d | 117 | for (end = src; *end; ++end) { |
16a06b24 | 118 | if (*end == delim) { |
8efb339d MA |
119 | break; |
120 | } | |
121 | if (*end == '\\' && end[1] != '\0') { | |
122 | end++; | |
f27aaf4b CB |
123 | } |
124 | } | |
8efb339d MA |
125 | if (*end == delim) { |
126 | *p = end + 1; | |
127 | *end = '\0'; | |
128 | } | |
7830f909 | 129 | return src; |
f27aaf4b CB |
130 | } |
131 | ||
16a06b24 SW |
132 | static void qemu_rbd_unescape(char *src) |
133 | { | |
134 | char *p; | |
135 | ||
136 | for (p = src; *src; ++src, ++p) { | |
137 | if (*src == '\\' && src[1] != '\0') { | |
138 | src++; | |
139 | } | |
140 | *p = *src; | |
141 | } | |
142 | *p = '\0'; | |
143 | } | |
144 | ||
c7cacb3e JC |
145 | static void qemu_rbd_parse_filename(const char *filename, QDict *options, |
146 | Error **errp) | |
f27aaf4b CB |
147 | { |
148 | const char *start; | |
e98c6961 EB |
149 | char *p, *buf; |
150 | QList *keypairs = NULL; | |
7830f909 | 151 | char *found_str; |
f27aaf4b CB |
152 | |
153 | if (!strstart(filename, "rbd:", &start)) { | |
d61563b2 | 154 | error_setg(errp, "File name must start with 'rbd:'"); |
c7cacb3e | 155 | return; |
f27aaf4b CB |
156 | } |
157 | ||
7267c094 | 158 | buf = g_strdup(start); |
f27aaf4b CB |
159 | p = buf; |
160 | ||
730b00bb | 161 | found_str = qemu_rbd_next_tok(p, '/', &p); |
7830f909 | 162 | if (!p) { |
7830f909 | 163 | error_setg(errp, "Pool name is required"); |
f27aaf4b CB |
164 | goto done; |
165 | } | |
7830f909 | 166 | qemu_rbd_unescape(found_str); |
46f5ac20 | 167 | qdict_put_str(options, "pool", found_str); |
fab5cf59 JD |
168 | |
169 | if (strchr(p, '@')) { | |
730b00bb | 170 | found_str = qemu_rbd_next_tok(p, '@', &p); |
7830f909 | 171 | qemu_rbd_unescape(found_str); |
46f5ac20 | 172 | qdict_put_str(options, "image", found_str); |
7830f909 | 173 | |
730b00bb | 174 | found_str = qemu_rbd_next_tok(p, ':', &p); |
7830f909 | 175 | qemu_rbd_unescape(found_str); |
46f5ac20 | 176 | qdict_put_str(options, "snapshot", found_str); |
fab5cf59 | 177 | } else { |
730b00bb | 178 | found_str = qemu_rbd_next_tok(p, ':', &p); |
7830f909 | 179 | qemu_rbd_unescape(found_str); |
46f5ac20 | 180 | qdict_put_str(options, "image", found_str); |
f27aaf4b | 181 | } |
7830f909 | 182 | if (!p) { |
f27aaf4b CB |
183 | goto done; |
184 | } | |
185 | ||
c7cacb3e JC |
186 | /* The following are essentially all key/value pairs, and we treat |
187 | * 'id' and 'conf' a bit special. Key/value pairs may be in any order. */ | |
188 | while (p) { | |
189 | char *name, *value; | |
730b00bb | 190 | name = qemu_rbd_next_tok(p, '=', &p); |
c7cacb3e JC |
191 | if (!p) { |
192 | error_setg(errp, "conf option %s has no value", name); | |
193 | break; | |
7c7e9df0 | 194 | } |
c7cacb3e JC |
195 | |
196 | qemu_rbd_unescape(name); | |
197 | ||
730b00bb | 198 | value = qemu_rbd_next_tok(p, ':', &p); |
c7cacb3e JC |
199 | qemu_rbd_unescape(value); |
200 | ||
201 | if (!strcmp(name, "conf")) { | |
46f5ac20 | 202 | qdict_put_str(options, "conf", value); |
c7cacb3e | 203 | } else if (!strcmp(name, "id")) { |
46f5ac20 | 204 | qdict_put_str(options, "user", value); |
c7cacb3e | 205 | } else { |
e98c6961 EB |
206 | /* |
207 | * We pass these internally to qemu_rbd_set_keypairs(), so | |
208 | * we can get away with the simpler list of [ "key1", | |
209 | * "value1", "key2", "value2" ] rather than a raw dict | |
210 | * { "key1": "value1", "key2": "value2" } where we can't | |
211 | * guarantee order, or even a more correct but complex | |
212 | * [ { "key1": "value1" }, { "key2": "value2" } ] | |
213 | */ | |
214 | if (!keypairs) { | |
215 | keypairs = qlist_new(); | |
c7cacb3e | 216 | } |
46f5ac20 EB |
217 | qlist_append_str(keypairs, name); |
218 | qlist_append_str(keypairs, value); | |
c7cacb3e | 219 | } |
7c7e9df0 | 220 | } |
c7cacb3e | 221 | |
e98c6961 EB |
222 | if (keypairs) { |
223 | qdict_put(options, "=keyvalue-pairs", | |
224 | qobject_to_json(QOBJECT(keypairs))); | |
c7cacb3e JC |
225 | } |
226 | ||
c7cacb3e | 227 | done: |
c7cacb3e | 228 | g_free(buf); |
e98c6961 | 229 | QDECREF(keypairs); |
c7cacb3e | 230 | return; |
7c7e9df0 SW |
231 | } |
232 | ||
60390a21 DB |
233 | |
234 | static int qemu_rbd_set_auth(rados_t cluster, const char *secretid, | |
235 | Error **errp) | |
236 | { | |
237 | if (secretid == 0) { | |
238 | return 0; | |
239 | } | |
240 | ||
241 | gchar *secret = qcrypto_secret_lookup_as_base64(secretid, | |
242 | errp); | |
243 | if (!secret) { | |
244 | return -1; | |
245 | } | |
246 | ||
247 | rados_conf_set(cluster, "key", secret); | |
248 | g_free(secret); | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
e98c6961 | 253 | static int qemu_rbd_set_keypairs(rados_t cluster, const char *keypairs_json, |
c7cacb3e | 254 | Error **errp) |
fab5cf59 | 255 | { |
e98c6961 EB |
256 | QList *keypairs; |
257 | QString *name; | |
258 | QString *value; | |
259 | const char *key; | |
260 | size_t remaining; | |
fab5cf59 JD |
261 | int ret = 0; |
262 | ||
e98c6961 EB |
263 | if (!keypairs_json) { |
264 | return ret; | |
265 | } | |
7dc847eb HR |
266 | keypairs = qobject_to(QList, |
267 | qobject_from_json(keypairs_json, &error_abort)); | |
e98c6961 EB |
268 | remaining = qlist_size(keypairs) / 2; |
269 | assert(remaining); | |
270 | ||
271 | while (remaining--) { | |
7dc847eb HR |
272 | name = qobject_to(QString, qlist_pop(keypairs)); |
273 | value = qobject_to(QString, qlist_pop(keypairs)); | |
e98c6961 EB |
274 | assert(name && value); |
275 | key = qstring_get_str(name); | |
276 | ||
277 | ret = rados_conf_set(cluster, key, qstring_get_str(value)); | |
e98c6961 | 278 | QDECREF(value); |
c7cacb3e | 279 | if (ret < 0) { |
e98c6961 | 280 | error_setg_errno(errp, -ret, "invalid conf option %s", key); |
71c87815 | 281 | QDECREF(name); |
c7cacb3e JC |
282 | ret = -EINVAL; |
283 | break; | |
fab5cf59 | 284 | } |
71c87815 | 285 | QDECREF(name); |
fab5cf59 JD |
286 | } |
287 | ||
e98c6961 | 288 | QDECREF(keypairs); |
fab5cf59 JD |
289 | return ret; |
290 | } | |
291 | ||
1d393bde | 292 | static void qemu_rbd_memset(RADOSCB *rcb, int64_t offs) |
293 | { | |
294 | if (LIBRBD_USE_IOVEC) { | |
295 | RBDAIOCB *acb = rcb->acb; | |
296 | iov_memset(acb->qiov->iov, acb->qiov->niov, offs, 0, | |
297 | acb->qiov->size - offs); | |
298 | } else { | |
299 | memset(rcb->buf + offs, 0, rcb->size - offs); | |
300 | } | |
301 | } | |
302 | ||
0f9d252d JC |
303 | static QemuOptsList runtime_opts = { |
304 | .name = "rbd", | |
305 | .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), | |
306 | .desc = { | |
307 | { | |
cbf036b4 | 308 | .name = "pool", |
0f9d252d | 309 | .type = QEMU_OPT_STRING, |
cbf036b4 | 310 | .help = "Rados pool name", |
0f9d252d JC |
311 | }, |
312 | { | |
cbf036b4 | 313 | .name = "image", |
0f9d252d | 314 | .type = QEMU_OPT_STRING, |
cbf036b4 | 315 | .help = "Image name in the pool", |
0f9d252d JC |
316 | }, |
317 | { | |
318 | .name = "conf", | |
319 | .type = QEMU_OPT_STRING, | |
320 | .help = "Rados config file location", | |
321 | }, | |
0f9d252d JC |
322 | { |
323 | .name = "snapshot", | |
324 | .type = QEMU_OPT_STRING, | |
325 | .help = "Ceph snapshot name", | |
326 | }, | |
327 | { | |
328 | /* maps to 'id' in rados_create() */ | |
329 | .name = "user", | |
330 | .type = QEMU_OPT_STRING, | |
331 | .help = "Rados id name", | |
332 | }, | |
cbf036b4 | 333 | /* |
2836284d | 334 | * server.* extracted manually, see qemu_rbd_mon_host() |
cbf036b4 | 335 | */ |
0f9d252d JC |
336 | { /* end of list */ } |
337 | }, | |
338 | }; | |
339 | ||
1bebea37 KW |
340 | /* FIXME Deprecate and remove keypairs or make it available in QMP. |
341 | * password_secret should eventually be configurable in opts->location. Support | |
342 | * for it in .bdrv_open will make it work here as well. */ | |
343 | static int qemu_rbd_do_create(BlockdevCreateOptions *options, | |
344 | const char *keypairs, const char *password_secret, | |
345 | Error **errp) | |
f27aaf4b | 346 | { |
1bebea37 | 347 | BlockdevCreateOptionsRbd *opts = &options->u.rbd; |
ad32e9c0 JD |
348 | rados_t cluster; |
349 | rados_ioctx_t io_ctx; | |
1bebea37 KW |
350 | int obj_order = 0; |
351 | int ret; | |
352 | ||
353 | assert(options->driver == BLOCKDEV_DRIVER_RBD); | |
354 | if (opts->location->has_snapshot) { | |
355 | error_setg(errp, "Can't use snapshot name for image creation"); | |
356 | return -EINVAL; | |
357 | } | |
f27aaf4b | 358 | |
1bebea37 KW |
359 | if (opts->has_cluster_size) { |
360 | int64_t objsize = opts->cluster_size; | |
bd0cf596 CL |
361 | if ((objsize - 1) & objsize) { /* not a power of 2? */ |
362 | error_setg(errp, "obj size needs to be power of 2"); | |
1bebea37 | 363 | return -EINVAL; |
bd0cf596 CL |
364 | } |
365 | if (objsize < 4096) { | |
366 | error_setg(errp, "obj size too small"); | |
1bebea37 | 367 | return -EINVAL; |
f27aaf4b | 368 | } |
786a4ea8 | 369 | obj_order = ctz32(objsize); |
f27aaf4b CB |
370 | } |
371 | ||
aa045c2d KW |
372 | ret = qemu_rbd_connect(&cluster, &io_ctx, opts->location, false, keypairs, |
373 | password_secret, errp); | |
87cd3d20 | 374 | if (ret < 0) { |
1bebea37 | 375 | return ret; |
f27aaf4b CB |
376 | } |
377 | ||
1bebea37 | 378 | ret = rbd_create(io_ctx, opts->location->image, opts->size, &obj_order); |
87cd3d20 VU |
379 | if (ret < 0) { |
380 | error_setg_errno(errp, -ret, "error rbd create"); | |
aa045c2d | 381 | goto out; |
87cd3d20 | 382 | } |
f27aaf4b | 383 | |
1bebea37 | 384 | ret = 0; |
aa045c2d KW |
385 | out: |
386 | rados_ioctx_destroy(io_ctx); | |
e38f643a | 387 | rados_shutdown(cluster); |
1bebea37 KW |
388 | return ret; |
389 | } | |
390 | ||
391 | static int qemu_rbd_co_create(BlockdevCreateOptions *options, Error **errp) | |
392 | { | |
393 | return qemu_rbd_do_create(options, NULL, NULL, errp); | |
394 | } | |
395 | ||
396 | static int coroutine_fn qemu_rbd_co_create_opts(const char *filename, | |
397 | QemuOpts *opts, | |
398 | Error **errp) | |
399 | { | |
400 | BlockdevCreateOptions *create_options; | |
401 | BlockdevCreateOptionsRbd *rbd_opts; | |
402 | BlockdevOptionsRbd *loc; | |
403 | Error *local_err = NULL; | |
404 | const char *keypairs, *password_secret; | |
405 | QDict *options = NULL; | |
406 | int ret = 0; | |
407 | ||
408 | create_options = g_new0(BlockdevCreateOptions, 1); | |
409 | create_options->driver = BLOCKDEV_DRIVER_RBD; | |
410 | rbd_opts = &create_options->u.rbd; | |
411 | ||
412 | rbd_opts->location = g_new0(BlockdevOptionsRbd, 1); | |
413 | ||
414 | password_secret = qemu_opt_get(opts, "password-secret"); | |
415 | ||
416 | /* Read out options */ | |
417 | rbd_opts->size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), | |
418 | BDRV_SECTOR_SIZE); | |
419 | rbd_opts->cluster_size = qemu_opt_get_size_del(opts, | |
420 | BLOCK_OPT_CLUSTER_SIZE, 0); | |
421 | rbd_opts->has_cluster_size = (rbd_opts->cluster_size != 0); | |
422 | ||
423 | options = qdict_new(); | |
424 | qemu_rbd_parse_filename(filename, options, &local_err); | |
425 | if (local_err) { | |
426 | ret = -EINVAL; | |
427 | error_propagate(errp, local_err); | |
428 | goto exit; | |
429 | } | |
430 | ||
431 | /* | |
432 | * Caution: while qdict_get_try_str() is fine, getting non-string | |
433 | * types would require more care. When @options come from -blockdev | |
434 | * or blockdev_add, its members are typed according to the QAPI | |
435 | * schema, but when they come from -drive, they're all QString. | |
436 | */ | |
437 | loc = rbd_opts->location; | |
438 | loc->pool = g_strdup(qdict_get_try_str(options, "pool")); | |
439 | loc->conf = g_strdup(qdict_get_try_str(options, "conf")); | |
440 | loc->has_conf = !!loc->conf; | |
441 | loc->user = g_strdup(qdict_get_try_str(options, "user")); | |
442 | loc->has_user = !!loc->user; | |
443 | loc->image = g_strdup(qdict_get_try_str(options, "image")); | |
444 | keypairs = qdict_get_try_str(options, "=keyvalue-pairs"); | |
445 | ||
446 | ret = qemu_rbd_do_create(create_options, keypairs, password_secret, errp); | |
447 | if (ret < 0) { | |
448 | goto exit; | |
449 | } | |
c7cacb3e JC |
450 | |
451 | exit: | |
452 | QDECREF(options); | |
1bebea37 | 453 | qapi_free_BlockdevCreateOptions(create_options); |
f27aaf4b CB |
454 | return ret; |
455 | } | |
456 | ||
457 | /* | |
e04fb07f SH |
458 | * This aio completion is being called from rbd_finish_bh() and runs in qemu |
459 | * BH context. | |
f27aaf4b | 460 | */ |
ad32e9c0 | 461 | static void qemu_rbd_complete_aio(RADOSCB *rcb) |
f27aaf4b CB |
462 | { |
463 | RBDAIOCB *acb = rcb->acb; | |
464 | int64_t r; | |
465 | ||
f27aaf4b CB |
466 | r = rcb->ret; |
467 | ||
dc7588c1 | 468 | if (acb->cmd != RBD_AIO_READ) { |
f27aaf4b CB |
469 | if (r < 0) { |
470 | acb->ret = r; | |
471 | acb->error = 1; | |
472 | } else if (!acb->error) { | |
ad32e9c0 | 473 | acb->ret = rcb->size; |
f27aaf4b CB |
474 | } |
475 | } else { | |
ad32e9c0 | 476 | if (r < 0) { |
1d393bde | 477 | qemu_rbd_memset(rcb, 0); |
f27aaf4b CB |
478 | acb->ret = r; |
479 | acb->error = 1; | |
ad32e9c0 | 480 | } else if (r < rcb->size) { |
1d393bde | 481 | qemu_rbd_memset(rcb, r); |
f27aaf4b | 482 | if (!acb->error) { |
ad32e9c0 | 483 | acb->ret = rcb->size; |
f27aaf4b CB |
484 | } |
485 | } else if (!acb->error) { | |
ad32e9c0 | 486 | acb->ret = r; |
f27aaf4b CB |
487 | } |
488 | } | |
f27aaf4b | 489 | |
e04fb07f | 490 | g_free(rcb); |
f27aaf4b | 491 | |
1d393bde | 492 | if (!LIBRBD_USE_IOVEC) { |
493 | if (acb->cmd == RBD_AIO_READ) { | |
494 | qemu_iovec_from_buf(acb->qiov, 0, acb->bounce, acb->qiov->size); | |
495 | } | |
496 | qemu_vfree(acb->bounce); | |
e04fb07f | 497 | } |
1d393bde | 498 | |
e04fb07f | 499 | acb->common.cb(acb->common.opaque, (acb->ret > 0 ? 0 : acb->ret)); |
f27aaf4b | 500 | |
8007429a | 501 | qemu_aio_unref(acb); |
f27aaf4b CB |
502 | } |
503 | ||
4bfb2741 | 504 | static char *qemu_rbd_mon_host(BlockdevOptionsRbd *opts, Error **errp) |
0a55679b | 505 | { |
4bfb2741 | 506 | const char **vals; |
2836284d MA |
507 | const char *host, *port; |
508 | char *rados_str; | |
4bfb2741 KW |
509 | InetSocketAddressBaseList *p; |
510 | int i, cnt; | |
511 | ||
512 | if (!opts->has_server) { | |
513 | return NULL; | |
514 | } | |
515 | ||
516 | for (cnt = 0, p = opts->server; p; p = p->next) { | |
517 | cnt++; | |
518 | } | |
519 | ||
520 | vals = g_new(const char *, cnt + 1); | |
521 | ||
522 | for (i = 0, p = opts->server; p; p = p->next, i++) { | |
523 | host = p->value->host; | |
524 | port = p->value->port; | |
0a55679b | 525 | |
2836284d | 526 | if (strchr(host, ':')) { |
4bfb2741 | 527 | vals[i] = g_strdup_printf("[%s]:%s", host, port); |
0a55679b | 528 | } else { |
4bfb2741 | 529 | vals[i] = g_strdup_printf("%s:%s", host, port); |
0a55679b | 530 | } |
0a55679b | 531 | } |
2836284d | 532 | vals[i] = NULL; |
0a55679b | 533 | |
2836284d | 534 | rados_str = i ? g_strjoinv(";", (char **)vals) : NULL; |
2836284d | 535 | g_strfreev((char **)vals); |
0a55679b JC |
536 | return rados_str; |
537 | } | |
538 | ||
3d9136f9 | 539 | static int qemu_rbd_connect(rados_t *cluster, rados_ioctx_t *io_ctx, |
4bfb2741 | 540 | BlockdevOptionsRbd *opts, bool cache, |
4ff45049 KW |
541 | const char *keypairs, const char *secretid, |
542 | Error **errp) | |
f27aaf4b | 543 | { |
0a55679b | 544 | char *mon_host = NULL; |
3d9136f9 | 545 | Error *local_err = NULL; |
f27aaf4b CB |
546 | int r; |
547 | ||
4bfb2741 | 548 | mon_host = qemu_rbd_mon_host(opts, &local_err); |
0a55679b JC |
549 | if (local_err) { |
550 | error_propagate(errp, local_err); | |
551 | r = -EINVAL; | |
552 | goto failed_opts; | |
553 | } | |
554 | ||
4bfb2741 | 555 | r = rados_create(cluster, opts->user); |
ad32e9c0 | 556 | if (r < 0) { |
87cd3d20 | 557 | error_setg_errno(errp, -r, "error initializing"); |
c3ca988d | 558 | goto failed_opts; |
f27aaf4b CB |
559 | } |
560 | ||
c7cacb3e | 561 | /* try default location when conf=NULL, but ignore failure */ |
4bfb2741 KW |
562 | r = rados_conf_read_file(*cluster, opts->conf); |
563 | if (opts->has_conf && r < 0) { | |
564 | error_setg_errno(errp, -r, "error reading conf file %s", opts->conf); | |
c7cacb3e | 565 | goto failed_shutdown; |
99a3c89d JD |
566 | } |
567 | ||
3d9136f9 | 568 | r = qemu_rbd_set_keypairs(*cluster, keypairs, errp); |
c7cacb3e JC |
569 | if (r < 0) { |
570 | goto failed_shutdown; | |
99a3c89d JD |
571 | } |
572 | ||
0a55679b | 573 | if (mon_host) { |
3d9136f9 | 574 | r = rados_conf_set(*cluster, "mon_host", mon_host); |
0a55679b JC |
575 | if (r < 0) { |
576 | goto failed_shutdown; | |
577 | } | |
578 | } | |
579 | ||
3d9136f9 | 580 | if (qemu_rbd_set_auth(*cluster, secretid, errp) < 0) { |
60390a21 DB |
581 | r = -EIO; |
582 | goto failed_shutdown; | |
583 | } | |
584 | ||
b11f38fc JD |
585 | /* |
586 | * Fallback to more conservative semantics if setting cache | |
587 | * options fails. Ignore errors from setting rbd_cache because the | |
588 | * only possible error is that the option does not exist, and | |
589 | * librbd defaults to no caching. If write through caching cannot | |
590 | * be set up, fall back to no caching. | |
591 | */ | |
3d9136f9 KW |
592 | if (cache) { |
593 | rados_conf_set(*cluster, "rbd_cache", "true"); | |
b11f38fc | 594 | } else { |
3d9136f9 | 595 | rados_conf_set(*cluster, "rbd_cache", "false"); |
b11f38fc JD |
596 | } |
597 | ||
3d9136f9 | 598 | r = rados_connect(*cluster); |
ad32e9c0 | 599 | if (r < 0) { |
87cd3d20 | 600 | error_setg_errno(errp, -r, "error connecting"); |
eb93d5d9 | 601 | goto failed_shutdown; |
f27aaf4b CB |
602 | } |
603 | ||
4bfb2741 | 604 | r = rados_ioctx_create(*cluster, opts->pool, io_ctx); |
ad32e9c0 | 605 | if (r < 0) { |
4bfb2741 | 606 | error_setg_errno(errp, -r, "error opening pool %s", opts->pool); |
eb93d5d9 | 607 | goto failed_shutdown; |
f27aaf4b CB |
608 | } |
609 | ||
3d9136f9 KW |
610 | return 0; |
611 | ||
612 | failed_shutdown: | |
613 | rados_shutdown(*cluster); | |
3d9136f9 | 614 | failed_opts: |
3d9136f9 KW |
615 | g_free(mon_host); |
616 | return r; | |
617 | } | |
618 | ||
619 | static int qemu_rbd_open(BlockDriverState *bs, QDict *options, int flags, | |
620 | Error **errp) | |
621 | { | |
622 | BDRVRBDState *s = bs->opaque; | |
4bfb2741 KW |
623 | BlockdevOptionsRbd *opts = NULL; |
624 | Visitor *v; | |
625 | QObject *crumpled = NULL; | |
3d9136f9 KW |
626 | Error *local_err = NULL; |
627 | const char *filename; | |
4ff45049 | 628 | char *keypairs, *secretid; |
3d9136f9 KW |
629 | int r; |
630 | ||
631 | /* If we are given a filename, parse the filename, with precedence given to | |
632 | * filename encoded options */ | |
633 | filename = qdict_get_try_str(options, "filename"); | |
634 | if (filename) { | |
635 | warn_report("'filename' option specified. " | |
636 | "This is an unsupported option, and may be deprecated " | |
637 | "in the future"); | |
638 | qemu_rbd_parse_filename(filename, options, &local_err); | |
4ff45049 | 639 | qdict_del(options, "filename"); |
3d9136f9 KW |
640 | if (local_err) { |
641 | error_propagate(errp, local_err); | |
642 | return -EINVAL; | |
643 | } | |
644 | } | |
645 | ||
4ff45049 KW |
646 | keypairs = g_strdup(qdict_get_try_str(options, "=keyvalue-pairs")); |
647 | if (keypairs) { | |
648 | qdict_del(options, "=keyvalue-pairs"); | |
649 | } | |
650 | ||
651 | secretid = g_strdup(qdict_get_try_str(options, "password-secret")); | |
652 | if (secretid) { | |
653 | qdict_del(options, "password-secret"); | |
654 | } | |
655 | ||
4bfb2741 KW |
656 | /* Convert the remaining options into a QAPI object */ |
657 | crumpled = qdict_crumple(options, errp); | |
658 | if (crumpled == NULL) { | |
659 | r = -EINVAL; | |
660 | goto out; | |
661 | } | |
662 | ||
663 | v = qobject_input_visitor_new_keyval(crumpled); | |
664 | visit_type_BlockdevOptionsRbd(v, NULL, &opts, &local_err); | |
665 | visit_free(v); | |
666 | qobject_decref(crumpled); | |
667 | ||
668 | if (local_err) { | |
669 | error_propagate(errp, local_err); | |
670 | r = -EINVAL; | |
671 | goto out; | |
672 | } | |
673 | ||
d41a5588 KW |
674 | r = qemu_rbd_connect(&s->cluster, &s->io_ctx, opts, |
675 | !(flags & BDRV_O_NOCACHE), keypairs, secretid, errp); | |
3d9136f9 | 676 | if (r < 0) { |
4ff45049 | 677 | goto out; |
3d9136f9 KW |
678 | } |
679 | ||
d41a5588 KW |
680 | s->snap = g_strdup(opts->snapshot); |
681 | s->image_name = g_strdup(opts->image); | |
682 | ||
e2b8247a | 683 | /* rbd_open is always r/w */ |
80b61a27 | 684 | r = rbd_open(s->io_ctx, s->image_name, &s->image, s->snap); |
f27aaf4b | 685 | if (r < 0) { |
80b61a27 JC |
686 | error_setg_errno(errp, -r, "error reading header from %s", |
687 | s->image_name); | |
eb93d5d9 | 688 | goto failed_open; |
f27aaf4b CB |
689 | } |
690 | ||
e2b8247a JC |
691 | /* If we are using an rbd snapshot, we must be r/o, otherwise |
692 | * leave as-is */ | |
693 | if (s->snap != NULL) { | |
398e6ad0 KW |
694 | if (!bdrv_is_read_only(bs)) { |
695 | error_report("Opening rbd snapshots without an explicit " | |
696 | "read-only=on option is deprecated. Future versions " | |
697 | "will refuse to open the image instead of " | |
698 | "automatically marking the image read-only."); | |
699 | r = bdrv_set_read_only(bs, true, &local_err); | |
700 | if (r < 0) { | |
701 | error_propagate(errp, local_err); | |
702 | goto failed_open; | |
703 | } | |
e2b8247a JC |
704 | } |
705 | } | |
f27aaf4b | 706 | |
4ff45049 KW |
707 | r = 0; |
708 | goto out; | |
f27aaf4b | 709 | |
eb93d5d9 | 710 | failed_open: |
ad32e9c0 | 711 | rados_ioctx_destroy(s->io_ctx); |
eb93d5d9 | 712 | g_free(s->snap); |
80b61a27 | 713 | g_free(s->image_name); |
3d9136f9 | 714 | rados_shutdown(s->cluster); |
4ff45049 | 715 | out: |
4bfb2741 | 716 | qapi_free_BlockdevOptionsRbd(opts); |
4ff45049 KW |
717 | g_free(keypairs); |
718 | g_free(secretid); | |
f27aaf4b CB |
719 | return r; |
720 | } | |
721 | ||
56e7cf8d JC |
722 | |
723 | /* Since RBD is currently always opened R/W via the API, | |
724 | * we just need to check if we are using a snapshot or not, in | |
725 | * order to determine if we will allow it to be R/W */ | |
726 | static int qemu_rbd_reopen_prepare(BDRVReopenState *state, | |
727 | BlockReopenQueue *queue, Error **errp) | |
728 | { | |
729 | BDRVRBDState *s = state->bs->opaque; | |
730 | int ret = 0; | |
731 | ||
732 | if (s->snap && state->flags & BDRV_O_RDWR) { | |
733 | error_setg(errp, | |
734 | "Cannot change node '%s' to r/w when using RBD snapshot", | |
735 | bdrv_get_device_or_node_name(state->bs)); | |
736 | ret = -EINVAL; | |
737 | } | |
738 | ||
739 | return ret; | |
740 | } | |
741 | ||
ad32e9c0 | 742 | static void qemu_rbd_close(BlockDriverState *bs) |
f27aaf4b CB |
743 | { |
744 | BDRVRBDState *s = bs->opaque; | |
745 | ||
ad32e9c0 JD |
746 | rbd_close(s->image); |
747 | rados_ioctx_destroy(s->io_ctx); | |
7267c094 | 748 | g_free(s->snap); |
80b61a27 | 749 | g_free(s->image_name); |
ad32e9c0 | 750 | rados_shutdown(s->cluster); |
f27aaf4b CB |
751 | } |
752 | ||
d7331bed | 753 | static const AIOCBInfo rbd_aiocb_info = { |
f27aaf4b | 754 | .aiocb_size = sizeof(RBDAIOCB), |
f27aaf4b CB |
755 | }; |
756 | ||
e04fb07f | 757 | static void rbd_finish_bh(void *opaque) |
f27aaf4b | 758 | { |
e04fb07f | 759 | RADOSCB *rcb = opaque; |
e04fb07f | 760 | qemu_rbd_complete_aio(rcb); |
ad32e9c0 JD |
761 | } |
762 | ||
763 | /* | |
764 | * This is the callback function for rbd_aio_read and _write | |
765 | * | |
766 | * Note: this function is being called from a non qemu thread so | |
767 | * we need to be careful about what we do here. Generally we only | |
e04fb07f SH |
768 | * schedule a BH, and do the rest of the io completion handling |
769 | * from rbd_finish_bh() which runs in a qemu context. | |
ad32e9c0 JD |
770 | */ |
771 | static void rbd_finish_aiocb(rbd_completion_t c, RADOSCB *rcb) | |
772 | { | |
e04fb07f SH |
773 | RBDAIOCB *acb = rcb->acb; |
774 | ||
ad32e9c0 JD |
775 | rcb->ret = rbd_aio_get_return_value(c); |
776 | rbd_aio_release(c); | |
f27aaf4b | 777 | |
fffb6e12 PB |
778 | aio_bh_schedule_oneshot(bdrv_get_aio_context(acb->common.bs), |
779 | rbd_finish_bh, rcb); | |
f27aaf4b CB |
780 | } |
781 | ||
787f3133 JD |
782 | static int rbd_aio_discard_wrapper(rbd_image_t image, |
783 | uint64_t off, | |
784 | uint64_t len, | |
785 | rbd_completion_t comp) | |
786 | { | |
787 | #ifdef LIBRBD_SUPPORTS_DISCARD | |
788 | return rbd_aio_discard(image, off, len, comp); | |
789 | #else | |
790 | return -ENOTSUP; | |
791 | #endif | |
792 | } | |
793 | ||
dc7588c1 JD |
794 | static int rbd_aio_flush_wrapper(rbd_image_t image, |
795 | rbd_completion_t comp) | |
796 | { | |
797 | #ifdef LIBRBD_SUPPORTS_AIO_FLUSH | |
798 | return rbd_aio_flush(image, comp); | |
799 | #else | |
800 | return -ENOTSUP; | |
801 | #endif | |
802 | } | |
803 | ||
7c84b1b8 | 804 | static BlockAIOCB *rbd_start_aio(BlockDriverState *bs, |
7bbca9e2 | 805 | int64_t off, |
7c84b1b8 | 806 | QEMUIOVector *qiov, |
7bbca9e2 | 807 | int64_t size, |
097310b5 | 808 | BlockCompletionFunc *cb, |
7c84b1b8 MA |
809 | void *opaque, |
810 | RBDAIOCmd cmd) | |
f27aaf4b CB |
811 | { |
812 | RBDAIOCB *acb; | |
0f7a0237 | 813 | RADOSCB *rcb = NULL; |
ad32e9c0 | 814 | rbd_completion_t c; |
51a13528 | 815 | int r; |
f27aaf4b CB |
816 | |
817 | BDRVRBDState *s = bs->opaque; | |
818 | ||
d7331bed | 819 | acb = qemu_aio_get(&rbd_aiocb_info, bs, cb, opaque); |
787f3133 | 820 | acb->cmd = cmd; |
f27aaf4b | 821 | acb->qiov = qiov; |
7bbca9e2 | 822 | assert(!qiov || qiov->size == size); |
1d393bde | 823 | |
824 | rcb = g_new(RADOSCB, 1); | |
825 | ||
826 | if (!LIBRBD_USE_IOVEC) { | |
827 | if (cmd == RBD_AIO_DISCARD || cmd == RBD_AIO_FLUSH) { | |
828 | acb->bounce = NULL; | |
829 | } else { | |
830 | acb->bounce = qemu_try_blockalign(bs, qiov->size); | |
831 | if (acb->bounce == NULL) { | |
832 | goto failed; | |
833 | } | |
0f7a0237 | 834 | } |
1d393bde | 835 | if (cmd == RBD_AIO_WRITE) { |
836 | qemu_iovec_to_buf(acb->qiov, 0, acb->bounce, qiov->size); | |
837 | } | |
838 | rcb->buf = acb->bounce; | |
787f3133 | 839 | } |
1d393bde | 840 | |
f27aaf4b CB |
841 | acb->ret = 0; |
842 | acb->error = 0; | |
843 | acb->s = s; | |
f27aaf4b | 844 | |
ad32e9c0 | 845 | rcb->acb = acb; |
ad32e9c0 JD |
846 | rcb->s = acb->s; |
847 | rcb->size = size; | |
51a13528 JD |
848 | r = rbd_aio_create_completion(rcb, (rbd_callback_t) rbd_finish_aiocb, &c); |
849 | if (r < 0) { | |
850 | goto failed; | |
851 | } | |
f27aaf4b | 852 | |
787f3133 JD |
853 | switch (cmd) { |
854 | case RBD_AIO_WRITE: | |
1d393bde | 855 | #ifdef LIBRBD_SUPPORTS_IOVEC |
856 | r = rbd_aio_writev(s->image, qiov->iov, qiov->niov, off, c); | |
857 | #else | |
858 | r = rbd_aio_write(s->image, off, size, rcb->buf, c); | |
859 | #endif | |
787f3133 JD |
860 | break; |
861 | case RBD_AIO_READ: | |
1d393bde | 862 | #ifdef LIBRBD_SUPPORTS_IOVEC |
863 | r = rbd_aio_readv(s->image, qiov->iov, qiov->niov, off, c); | |
864 | #else | |
865 | r = rbd_aio_read(s->image, off, size, rcb->buf, c); | |
866 | #endif | |
787f3133 JD |
867 | break; |
868 | case RBD_AIO_DISCARD: | |
869 | r = rbd_aio_discard_wrapper(s->image, off, size, c); | |
870 | break; | |
dc7588c1 JD |
871 | case RBD_AIO_FLUSH: |
872 | r = rbd_aio_flush_wrapper(s->image, c); | |
873 | break; | |
787f3133 JD |
874 | default: |
875 | r = -EINVAL; | |
51a13528 JD |
876 | } |
877 | ||
878 | if (r < 0) { | |
405a2764 | 879 | goto failed_completion; |
f27aaf4b | 880 | } |
f27aaf4b | 881 | return &acb->common; |
51a13528 | 882 | |
405a2764 KW |
883 | failed_completion: |
884 | rbd_aio_release(c); | |
51a13528 | 885 | failed: |
7267c094 | 886 | g_free(rcb); |
1d393bde | 887 | if (!LIBRBD_USE_IOVEC) { |
888 | qemu_vfree(acb->bounce); | |
889 | } | |
890 | ||
8007429a | 891 | qemu_aio_unref(acb); |
51a13528 | 892 | return NULL; |
f27aaf4b CB |
893 | } |
894 | ||
7c84b1b8 MA |
895 | static BlockAIOCB *qemu_rbd_aio_readv(BlockDriverState *bs, |
896 | int64_t sector_num, | |
897 | QEMUIOVector *qiov, | |
898 | int nb_sectors, | |
097310b5 | 899 | BlockCompletionFunc *cb, |
7c84b1b8 | 900 | void *opaque) |
f27aaf4b | 901 | { |
7bbca9e2 | 902 | return rbd_start_aio(bs, sector_num << BDRV_SECTOR_BITS, qiov, |
e948f663 | 903 | (int64_t) nb_sectors << BDRV_SECTOR_BITS, cb, opaque, |
787f3133 | 904 | RBD_AIO_READ); |
f27aaf4b CB |
905 | } |
906 | ||
7c84b1b8 MA |
907 | static BlockAIOCB *qemu_rbd_aio_writev(BlockDriverState *bs, |
908 | int64_t sector_num, | |
909 | QEMUIOVector *qiov, | |
910 | int nb_sectors, | |
097310b5 | 911 | BlockCompletionFunc *cb, |
7c84b1b8 | 912 | void *opaque) |
f27aaf4b | 913 | { |
7bbca9e2 | 914 | return rbd_start_aio(bs, sector_num << BDRV_SECTOR_BITS, qiov, |
e948f663 | 915 | (int64_t) nb_sectors << BDRV_SECTOR_BITS, cb, opaque, |
787f3133 | 916 | RBD_AIO_WRITE); |
f27aaf4b CB |
917 | } |
918 | ||
dc7588c1 | 919 | #ifdef LIBRBD_SUPPORTS_AIO_FLUSH |
7c84b1b8 | 920 | static BlockAIOCB *qemu_rbd_aio_flush(BlockDriverState *bs, |
097310b5 | 921 | BlockCompletionFunc *cb, |
7c84b1b8 | 922 | void *opaque) |
dc7588c1 JD |
923 | { |
924 | return rbd_start_aio(bs, 0, NULL, 0, cb, opaque, RBD_AIO_FLUSH); | |
925 | } | |
926 | ||
927 | #else | |
928 | ||
8b94ff85 | 929 | static int qemu_rbd_co_flush(BlockDriverState *bs) |
7a3f5fe9 SW |
930 | { |
931 | #if LIBRBD_VERSION_CODE >= LIBRBD_VERSION(0, 1, 1) | |
932 | /* rbd_flush added in 0.1.1 */ | |
933 | BDRVRBDState *s = bs->opaque; | |
934 | return rbd_flush(s->image); | |
935 | #else | |
936 | return 0; | |
937 | #endif | |
938 | } | |
dc7588c1 | 939 | #endif |
7a3f5fe9 | 940 | |
ad32e9c0 | 941 | static int qemu_rbd_getinfo(BlockDriverState *bs, BlockDriverInfo *bdi) |
f27aaf4b CB |
942 | { |
943 | BDRVRBDState *s = bs->opaque; | |
ad32e9c0 JD |
944 | rbd_image_info_t info; |
945 | int r; | |
946 | ||
947 | r = rbd_stat(s->image, &info, sizeof(info)); | |
948 | if (r < 0) { | |
949 | return r; | |
950 | } | |
951 | ||
952 | bdi->cluster_size = info.obj_size; | |
f27aaf4b CB |
953 | return 0; |
954 | } | |
955 | ||
ad32e9c0 | 956 | static int64_t qemu_rbd_getlength(BlockDriverState *bs) |
f27aaf4b CB |
957 | { |
958 | BDRVRBDState *s = bs->opaque; | |
ad32e9c0 JD |
959 | rbd_image_info_t info; |
960 | int r; | |
f27aaf4b | 961 | |
ad32e9c0 JD |
962 | r = rbd_stat(s->image, &info, sizeof(info)); |
963 | if (r < 0) { | |
964 | return r; | |
965 | } | |
966 | ||
967 | return info.size; | |
f27aaf4b CB |
968 | } |
969 | ||
8243ccb7 HR |
970 | static int qemu_rbd_truncate(BlockDriverState *bs, int64_t offset, |
971 | PreallocMode prealloc, Error **errp) | |
30cdc48c JD |
972 | { |
973 | BDRVRBDState *s = bs->opaque; | |
974 | int r; | |
975 | ||
8243ccb7 HR |
976 | if (prealloc != PREALLOC_MODE_OFF) { |
977 | error_setg(errp, "Unsupported preallocation mode '%s'", | |
977c736f | 978 | PreallocMode_str(prealloc)); |
8243ccb7 HR |
979 | return -ENOTSUP; |
980 | } | |
981 | ||
30cdc48c JD |
982 | r = rbd_resize(s->image, offset); |
983 | if (r < 0) { | |
f59adb32 | 984 | error_setg_errno(errp, -r, "Failed to resize file"); |
30cdc48c JD |
985 | return r; |
986 | } | |
987 | ||
988 | return 0; | |
989 | } | |
990 | ||
ad32e9c0 JD |
991 | static int qemu_rbd_snap_create(BlockDriverState *bs, |
992 | QEMUSnapshotInfo *sn_info) | |
f27aaf4b CB |
993 | { |
994 | BDRVRBDState *s = bs->opaque; | |
f27aaf4b | 995 | int r; |
f27aaf4b CB |
996 | |
997 | if (sn_info->name[0] == '\0') { | |
998 | return -EINVAL; /* we need a name for rbd snapshots */ | |
999 | } | |
1000 | ||
1001 | /* | |
1002 | * rbd snapshots are using the name as the user controlled unique identifier | |
1003 | * we can't use the rbd snapid for that purpose, as it can't be set | |
1004 | */ | |
1005 | if (sn_info->id_str[0] != '\0' && | |
1006 | strcmp(sn_info->id_str, sn_info->name) != 0) { | |
1007 | return -EINVAL; | |
1008 | } | |
1009 | ||
1010 | if (strlen(sn_info->name) >= sizeof(sn_info->id_str)) { | |
1011 | return -ERANGE; | |
1012 | } | |
1013 | ||
ad32e9c0 | 1014 | r = rbd_snap_create(s->image, sn_info->name); |
f27aaf4b | 1015 | if (r < 0) { |
ad32e9c0 | 1016 | error_report("failed to create snap: %s", strerror(-r)); |
f27aaf4b CB |
1017 | return r; |
1018 | } | |
1019 | ||
f27aaf4b CB |
1020 | return 0; |
1021 | } | |
1022 | ||
bd603247 | 1023 | static int qemu_rbd_snap_remove(BlockDriverState *bs, |
a89d89d3 WX |
1024 | const char *snapshot_id, |
1025 | const char *snapshot_name, | |
1026 | Error **errp) | |
bd603247 GF |
1027 | { |
1028 | BDRVRBDState *s = bs->opaque; | |
1029 | int r; | |
1030 | ||
a89d89d3 WX |
1031 | if (!snapshot_name) { |
1032 | error_setg(errp, "rbd need a valid snapshot name"); | |
1033 | return -EINVAL; | |
1034 | } | |
1035 | ||
1036 | /* If snapshot_id is specified, it must be equal to name, see | |
1037 | qemu_rbd_snap_list() */ | |
1038 | if (snapshot_id && strcmp(snapshot_id, snapshot_name)) { | |
1039 | error_setg(errp, | |
1040 | "rbd do not support snapshot id, it should be NULL or " | |
1041 | "equal to snapshot name"); | |
1042 | return -EINVAL; | |
1043 | } | |
1044 | ||
bd603247 | 1045 | r = rbd_snap_remove(s->image, snapshot_name); |
a89d89d3 WX |
1046 | if (r < 0) { |
1047 | error_setg_errno(errp, -r, "Failed to remove the snapshot"); | |
1048 | } | |
bd603247 GF |
1049 | return r; |
1050 | } | |
1051 | ||
1052 | static int qemu_rbd_snap_rollback(BlockDriverState *bs, | |
1053 | const char *snapshot_name) | |
1054 | { | |
1055 | BDRVRBDState *s = bs->opaque; | |
bd603247 | 1056 | |
9be38598 | 1057 | return rbd_snap_rollback(s->image, snapshot_name); |
bd603247 GF |
1058 | } |
1059 | ||
ad32e9c0 JD |
1060 | static int qemu_rbd_snap_list(BlockDriverState *bs, |
1061 | QEMUSnapshotInfo **psn_tab) | |
f27aaf4b CB |
1062 | { |
1063 | BDRVRBDState *s = bs->opaque; | |
f27aaf4b | 1064 | QEMUSnapshotInfo *sn_info, *sn_tab = NULL; |
ad32e9c0 JD |
1065 | int i, snap_count; |
1066 | rbd_snap_info_t *snaps; | |
1067 | int max_snaps = RBD_MAX_SNAPS; | |
f27aaf4b | 1068 | |
ad32e9c0 | 1069 | do { |
02c4f26b | 1070 | snaps = g_new(rbd_snap_info_t, max_snaps); |
ad32e9c0 | 1071 | snap_count = rbd_snap_list(s->image, snaps, &max_snaps); |
9e6337d0 | 1072 | if (snap_count <= 0) { |
7267c094 | 1073 | g_free(snaps); |
f27aaf4b | 1074 | } |
ad32e9c0 | 1075 | } while (snap_count == -ERANGE); |
f27aaf4b | 1076 | |
ad32e9c0 | 1077 | if (snap_count <= 0) { |
b9c53290 | 1078 | goto done; |
f27aaf4b CB |
1079 | } |
1080 | ||
5839e53b | 1081 | sn_tab = g_new0(QEMUSnapshotInfo, snap_count); |
f27aaf4b | 1082 | |
ad32e9c0 JD |
1083 | for (i = 0; i < snap_count; i++) { |
1084 | const char *snap_name = snaps[i].name; | |
f27aaf4b CB |
1085 | |
1086 | sn_info = sn_tab + i; | |
1087 | pstrcpy(sn_info->id_str, sizeof(sn_info->id_str), snap_name); | |
1088 | pstrcpy(sn_info->name, sizeof(sn_info->name), snap_name); | |
f27aaf4b | 1089 | |
ad32e9c0 | 1090 | sn_info->vm_state_size = snaps[i].size; |
f27aaf4b CB |
1091 | sn_info->date_sec = 0; |
1092 | sn_info->date_nsec = 0; | |
1093 | sn_info->vm_clock_nsec = 0; | |
1094 | } | |
ad32e9c0 | 1095 | rbd_snap_list_end(snaps); |
9e6337d0 | 1096 | g_free(snaps); |
ad32e9c0 | 1097 | |
b9c53290 | 1098 | done: |
f27aaf4b | 1099 | *psn_tab = sn_tab; |
f27aaf4b | 1100 | return snap_count; |
f27aaf4b CB |
1101 | } |
1102 | ||
787f3133 | 1103 | #ifdef LIBRBD_SUPPORTS_DISCARD |
4da444a0 EB |
1104 | static BlockAIOCB *qemu_rbd_aio_pdiscard(BlockDriverState *bs, |
1105 | int64_t offset, | |
f5a5ca79 | 1106 | int bytes, |
4da444a0 EB |
1107 | BlockCompletionFunc *cb, |
1108 | void *opaque) | |
787f3133 | 1109 | { |
f5a5ca79 | 1110 | return rbd_start_aio(bs, offset, NULL, bytes, cb, opaque, |
787f3133 JD |
1111 | RBD_AIO_DISCARD); |
1112 | } | |
1113 | #endif | |
1114 | ||
be217884 | 1115 | #ifdef LIBRBD_SUPPORTS_INVALIDATE |
2b148f39 PB |
1116 | static void coroutine_fn qemu_rbd_co_invalidate_cache(BlockDriverState *bs, |
1117 | Error **errp) | |
be217884 AC |
1118 | { |
1119 | BDRVRBDState *s = bs->opaque; | |
1120 | int r = rbd_invalidate_cache(s->image); | |
1121 | if (r < 0) { | |
1122 | error_setg_errno(errp, -r, "Failed to invalidate the cache"); | |
1123 | } | |
1124 | } | |
1125 | #endif | |
1126 | ||
bd0cf596 CL |
1127 | static QemuOptsList qemu_rbd_create_opts = { |
1128 | .name = "rbd-create-opts", | |
1129 | .head = QTAILQ_HEAD_INITIALIZER(qemu_rbd_create_opts.head), | |
1130 | .desc = { | |
1131 | { | |
1132 | .name = BLOCK_OPT_SIZE, | |
1133 | .type = QEMU_OPT_SIZE, | |
1134 | .help = "Virtual disk size" | |
1135 | }, | |
1136 | { | |
1137 | .name = BLOCK_OPT_CLUSTER_SIZE, | |
1138 | .type = QEMU_OPT_SIZE, | |
1139 | .help = "RBD object size" | |
1140 | }, | |
60390a21 DB |
1141 | { |
1142 | .name = "password-secret", | |
1143 | .type = QEMU_OPT_STRING, | |
1144 | .help = "ID of secret providing the password", | |
1145 | }, | |
bd0cf596 CL |
1146 | { /* end of list */ } |
1147 | } | |
f27aaf4b CB |
1148 | }; |
1149 | ||
1150 | static BlockDriver bdrv_rbd = { | |
c7cacb3e JC |
1151 | .format_name = "rbd", |
1152 | .instance_size = sizeof(BDRVRBDState), | |
1153 | .bdrv_parse_filename = qemu_rbd_parse_filename, | |
1154 | .bdrv_file_open = qemu_rbd_open, | |
1155 | .bdrv_close = qemu_rbd_close, | |
56e7cf8d | 1156 | .bdrv_reopen_prepare = qemu_rbd_reopen_prepare, |
1bebea37 | 1157 | .bdrv_co_create = qemu_rbd_co_create, |
efc75e2a | 1158 | .bdrv_co_create_opts = qemu_rbd_co_create_opts, |
c7cacb3e JC |
1159 | .bdrv_has_zero_init = bdrv_has_zero_init_1, |
1160 | .bdrv_get_info = qemu_rbd_getinfo, | |
1161 | .create_opts = &qemu_rbd_create_opts, | |
1162 | .bdrv_getlength = qemu_rbd_getlength, | |
1163 | .bdrv_truncate = qemu_rbd_truncate, | |
1164 | .protocol_name = "rbd", | |
f27aaf4b | 1165 | |
c68b89ac KW |
1166 | .bdrv_aio_readv = qemu_rbd_aio_readv, |
1167 | .bdrv_aio_writev = qemu_rbd_aio_writev, | |
dc7588c1 JD |
1168 | |
1169 | #ifdef LIBRBD_SUPPORTS_AIO_FLUSH | |
1170 | .bdrv_aio_flush = qemu_rbd_aio_flush, | |
1171 | #else | |
c68b89ac | 1172 | .bdrv_co_flush_to_disk = qemu_rbd_co_flush, |
dc7588c1 | 1173 | #endif |
f27aaf4b | 1174 | |
787f3133 | 1175 | #ifdef LIBRBD_SUPPORTS_DISCARD |
4da444a0 | 1176 | .bdrv_aio_pdiscard = qemu_rbd_aio_pdiscard, |
787f3133 JD |
1177 | #endif |
1178 | ||
c68b89ac | 1179 | .bdrv_snapshot_create = qemu_rbd_snap_create, |
bd603247 | 1180 | .bdrv_snapshot_delete = qemu_rbd_snap_remove, |
c68b89ac | 1181 | .bdrv_snapshot_list = qemu_rbd_snap_list, |
bd603247 | 1182 | .bdrv_snapshot_goto = qemu_rbd_snap_rollback, |
be217884 | 1183 | #ifdef LIBRBD_SUPPORTS_INVALIDATE |
2b148f39 | 1184 | .bdrv_co_invalidate_cache = qemu_rbd_co_invalidate_cache, |
be217884 | 1185 | #endif |
f27aaf4b CB |
1186 | }; |
1187 | ||
1188 | static void bdrv_rbd_init(void) | |
1189 | { | |
1190 | bdrv_register(&bdrv_rbd); | |
1191 | } | |
1192 | ||
1193 | block_init(bdrv_rbd_init); |