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Commit | Line | Data |
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8d6d89cb BR |
1 | /* |
2 | * GlusterFS backend for QEMU | |
3 | * | |
4 | * Copyright (C) 2012 Bharata B Rao <bharata@linux.vnet.ibm.com> | |
5 | * | |
85c09bc0 BR |
6 | * This work is licensed under the terms of the GNU GPL, version 2 or later. |
7 | * See the COPYING file in the top-level directory. | |
8d6d89cb | 8 | * |
8d6d89cb | 9 | */ |
80c71a24 | 10 | #include "qemu/osdep.h" |
8d6d89cb | 11 | #include <glusterfs/api/glfs.h> |
737e150e | 12 | #include "block/block_int.h" |
da34e65c | 13 | #include "qapi/error.h" |
6c7189bb | 14 | #include "qapi/qmp/qerror.h" |
1de7afc9 | 15 | #include "qemu/uri.h" |
0552ff24 | 16 | #include "qemu/error-report.h" |
c56ac33b | 17 | #include "qemu/cutils.h" |
8d6d89cb | 18 | |
f70c50c8 | 19 | #define GLUSTER_OPT_FILENAME "filename" |
6c7189bb PKK |
20 | #define GLUSTER_OPT_VOLUME "volume" |
21 | #define GLUSTER_OPT_PATH "path" | |
22 | #define GLUSTER_OPT_TYPE "type" | |
23 | #define GLUSTER_OPT_SERVER_PATTERN "server." | |
24 | #define GLUSTER_OPT_HOST "host" | |
25 | #define GLUSTER_OPT_PORT "port" | |
26 | #define GLUSTER_OPT_TO "to" | |
27 | #define GLUSTER_OPT_IPV4 "ipv4" | |
28 | #define GLUSTER_OPT_IPV6 "ipv6" | |
29 | #define GLUSTER_OPT_SOCKET "socket" | |
f70c50c8 | 30 | #define GLUSTER_OPT_DEBUG "debug" |
7edac2dd | 31 | #define GLUSTER_DEFAULT_PORT 24007 |
f70c50c8 PKK |
32 | #define GLUSTER_DEBUG_DEFAULT 4 |
33 | #define GLUSTER_DEBUG_MAX 9 | |
e9db8ff3 PKK |
34 | #define GLUSTER_OPT_LOGFILE "logfile" |
35 | #define GLUSTER_LOGFILE_DEFAULT "-" /* handled in libgfapi as /dev/stderr */ | |
f70c50c8 | 36 | |
6c7189bb | 37 | #define GERR_INDEX_HINT "hint: check in 'server' array index '%d'\n" |
f70c50c8 | 38 | |
8d6d89cb | 39 | typedef struct GlusterAIOCB { |
8d6d89cb BR |
40 | int64_t size; |
41 | int ret; | |
15744b0b | 42 | Coroutine *coroutine; |
6ee50af2 | 43 | AioContext *aio_context; |
8d6d89cb BR |
44 | } GlusterAIOCB; |
45 | ||
46 | typedef struct BDRVGlusterState { | |
47 | struct glfs *glfs; | |
8d6d89cb | 48 | struct glfs_fd *fd; |
e9db8ff3 | 49 | char *logfile; |
947eb203 | 50 | bool supports_seek_data; |
1a417e46 | 51 | int debug; |
8d6d89cb BR |
52 | } BDRVGlusterState; |
53 | ||
f70c50c8 PKK |
54 | typedef struct BDRVGlusterReopenState { |
55 | struct glfs *glfs; | |
56 | struct glfs_fd *fd; | |
57 | } BDRVGlusterReopenState; | |
58 | ||
f70c50c8 | 59 | |
6349c154 PKK |
60 | typedef struct GlfsPreopened { |
61 | char *volume; | |
62 | glfs_t *fs; | |
63 | int ref; | |
64 | } GlfsPreopened; | |
65 | ||
66 | typedef struct ListElement { | |
67 | QLIST_ENTRY(ListElement) list; | |
68 | GlfsPreopened saved; | |
69 | } ListElement; | |
70 | ||
71 | static QLIST_HEAD(glfs_list, ListElement) glfs_list; | |
72 | ||
f70c50c8 PKK |
73 | static QemuOptsList qemu_gluster_create_opts = { |
74 | .name = "qemu-gluster-create-opts", | |
75 | .head = QTAILQ_HEAD_INITIALIZER(qemu_gluster_create_opts.head), | |
76 | .desc = { | |
77 | { | |
78 | .name = BLOCK_OPT_SIZE, | |
79 | .type = QEMU_OPT_SIZE, | |
80 | .help = "Virtual disk size" | |
81 | }, | |
82 | { | |
83 | .name = BLOCK_OPT_PREALLOC, | |
84 | .type = QEMU_OPT_STRING, | |
85 | .help = "Preallocation mode (allowed values: off, full)" | |
86 | }, | |
87 | { | |
88 | .name = GLUSTER_OPT_DEBUG, | |
89 | .type = QEMU_OPT_NUMBER, | |
90 | .help = "Gluster log level, valid range is 0-9", | |
91 | }, | |
e9db8ff3 PKK |
92 | { |
93 | .name = GLUSTER_OPT_LOGFILE, | |
94 | .type = QEMU_OPT_STRING, | |
95 | .help = "Logfile path of libgfapi", | |
96 | }, | |
f70c50c8 PKK |
97 | { /* end of list */ } |
98 | } | |
99 | }; | |
100 | ||
101 | static QemuOptsList runtime_opts = { | |
102 | .name = "gluster", | |
103 | .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), | |
104 | .desc = { | |
105 | { | |
106 | .name = GLUSTER_OPT_FILENAME, | |
107 | .type = QEMU_OPT_STRING, | |
108 | .help = "URL to the gluster image", | |
109 | }, | |
110 | { | |
111 | .name = GLUSTER_OPT_DEBUG, | |
112 | .type = QEMU_OPT_NUMBER, | |
113 | .help = "Gluster log level, valid range is 0-9", | |
114 | }, | |
e9db8ff3 PKK |
115 | { |
116 | .name = GLUSTER_OPT_LOGFILE, | |
117 | .type = QEMU_OPT_STRING, | |
118 | .help = "Logfile path of libgfapi", | |
119 | }, | |
f70c50c8 PKK |
120 | { /* end of list */ } |
121 | }, | |
122 | }; | |
123 | ||
6c7189bb PKK |
124 | static QemuOptsList runtime_json_opts = { |
125 | .name = "gluster_json", | |
126 | .head = QTAILQ_HEAD_INITIALIZER(runtime_json_opts.head), | |
127 | .desc = { | |
128 | { | |
129 | .name = GLUSTER_OPT_VOLUME, | |
130 | .type = QEMU_OPT_STRING, | |
131 | .help = "name of gluster volume where VM image resides", | |
132 | }, | |
133 | { | |
134 | .name = GLUSTER_OPT_PATH, | |
135 | .type = QEMU_OPT_STRING, | |
136 | .help = "absolute path to image file in gluster volume", | |
137 | }, | |
138 | { | |
139 | .name = GLUSTER_OPT_DEBUG, | |
140 | .type = QEMU_OPT_NUMBER, | |
141 | .help = "Gluster log level, valid range is 0-9", | |
142 | }, | |
143 | { /* end of list */ } | |
144 | }, | |
145 | }; | |
146 | ||
147 | static QemuOptsList runtime_type_opts = { | |
148 | .name = "gluster_type", | |
149 | .head = QTAILQ_HEAD_INITIALIZER(runtime_type_opts.head), | |
150 | .desc = { | |
151 | { | |
152 | .name = GLUSTER_OPT_TYPE, | |
153 | .type = QEMU_OPT_STRING, | |
154 | .help = "tcp|unix", | |
155 | }, | |
156 | { /* end of list */ } | |
157 | }, | |
158 | }; | |
159 | ||
160 | static QemuOptsList runtime_unix_opts = { | |
161 | .name = "gluster_unix", | |
162 | .head = QTAILQ_HEAD_INITIALIZER(runtime_unix_opts.head), | |
163 | .desc = { | |
164 | { | |
165 | .name = GLUSTER_OPT_SOCKET, | |
166 | .type = QEMU_OPT_STRING, | |
167 | .help = "socket file path)", | |
168 | }, | |
169 | { /* end of list */ } | |
170 | }, | |
171 | }; | |
172 | ||
173 | static QemuOptsList runtime_tcp_opts = { | |
174 | .name = "gluster_tcp", | |
175 | .head = QTAILQ_HEAD_INITIALIZER(runtime_tcp_opts.head), | |
176 | .desc = { | |
177 | { | |
178 | .name = GLUSTER_OPT_TYPE, | |
179 | .type = QEMU_OPT_STRING, | |
180 | .help = "tcp|unix", | |
181 | }, | |
182 | { | |
183 | .name = GLUSTER_OPT_HOST, | |
184 | .type = QEMU_OPT_STRING, | |
185 | .help = "host address (hostname/ipv4/ipv6 addresses)", | |
186 | }, | |
187 | { | |
188 | .name = GLUSTER_OPT_PORT, | |
53d9837f | 189 | .type = QEMU_OPT_STRING, |
6c7189bb PKK |
190 | .help = "port number on which glusterd is listening (default 24007)", |
191 | }, | |
192 | { | |
193 | .name = "to", | |
194 | .type = QEMU_OPT_NUMBER, | |
195 | .help = "max port number, not supported by gluster", | |
196 | }, | |
197 | { | |
198 | .name = "ipv4", | |
199 | .type = QEMU_OPT_BOOL, | |
200 | .help = "ipv4 bool value, not supported by gluster", | |
201 | }, | |
202 | { | |
203 | .name = "ipv6", | |
204 | .type = QEMU_OPT_BOOL, | |
205 | .help = "ipv6 bool value, not supported by gluster", | |
206 | }, | |
207 | { /* end of list */ } | |
208 | }, | |
209 | }; | |
f70c50c8 | 210 | |
6349c154 PKK |
211 | static void glfs_set_preopened(const char *volume, glfs_t *fs) |
212 | { | |
213 | ListElement *entry = NULL; | |
214 | ||
215 | entry = g_new(ListElement, 1); | |
216 | ||
217 | entry->saved.volume = g_strdup(volume); | |
218 | ||
219 | entry->saved.fs = fs; | |
220 | entry->saved.ref = 1; | |
221 | ||
222 | QLIST_INSERT_HEAD(&glfs_list, entry, list); | |
223 | } | |
224 | ||
225 | static glfs_t *glfs_find_preopened(const char *volume) | |
226 | { | |
227 | ListElement *entry = NULL; | |
228 | ||
229 | QLIST_FOREACH(entry, &glfs_list, list) { | |
230 | if (strcmp(entry->saved.volume, volume) == 0) { | |
231 | entry->saved.ref++; | |
232 | return entry->saved.fs; | |
233 | } | |
234 | } | |
235 | ||
236 | return NULL; | |
237 | } | |
238 | ||
239 | static void glfs_clear_preopened(glfs_t *fs) | |
240 | { | |
241 | ListElement *entry = NULL; | |
668c0e44 | 242 | ListElement *next; |
6349c154 PKK |
243 | |
244 | if (fs == NULL) { | |
245 | return; | |
246 | } | |
247 | ||
668c0e44 | 248 | QLIST_FOREACH_SAFE(entry, &glfs_list, list, next) { |
6349c154 PKK |
249 | if (entry->saved.fs == fs) { |
250 | if (--entry->saved.ref) { | |
251 | return; | |
252 | } | |
253 | ||
254 | QLIST_REMOVE(entry, list); | |
255 | ||
256 | glfs_fini(entry->saved.fs); | |
257 | g_free(entry->saved.volume); | |
258 | g_free(entry); | |
259 | } | |
260 | } | |
261 | } | |
262 | ||
7edac2dd | 263 | static int parse_volume_options(BlockdevOptionsGluster *gconf, char *path) |
8d6d89cb BR |
264 | { |
265 | char *p, *q; | |
266 | ||
267 | if (!path) { | |
268 | return -EINVAL; | |
269 | } | |
270 | ||
271 | /* volume */ | |
272 | p = q = path + strspn(path, "/"); | |
273 | p += strcspn(p, "/"); | |
274 | if (*p == '\0') { | |
275 | return -EINVAL; | |
276 | } | |
d5cf4079 | 277 | gconf->volume = g_strndup(q, p - q); |
8d6d89cb | 278 | |
d5cf4079 | 279 | /* path */ |
8d6d89cb BR |
280 | p += strspn(p, "/"); |
281 | if (*p == '\0') { | |
282 | return -EINVAL; | |
283 | } | |
d5cf4079 | 284 | gconf->path = g_strdup(p); |
8d6d89cb BR |
285 | return 0; |
286 | } | |
287 | ||
288 | /* | |
d5cf4079 | 289 | * file=gluster[+transport]://[host[:port]]/volume/path[?socket=...] |
8d6d89cb BR |
290 | * |
291 | * 'gluster' is the protocol. | |
292 | * | |
293 | * 'transport' specifies the transport type used to connect to gluster | |
294 | * management daemon (glusterd). Valid transport types are | |
0552ff24 | 295 | * tcp or unix. If a transport type isn't specified, then tcp type is assumed. |
8d6d89cb | 296 | * |
d5cf4079 | 297 | * 'host' specifies the host where the volume file specification for |
0552ff24 | 298 | * the given volume resides. This can be either hostname or ipv4 address. |
d5cf4079 | 299 | * If transport type is 'unix', then 'host' field should not be specified. |
8d6d89cb BR |
300 | * The 'socket' field needs to be populated with the path to unix domain |
301 | * socket. | |
302 | * | |
303 | * 'port' is the port number on which glusterd is listening. This is optional | |
304 | * and if not specified, QEMU will send 0 which will make gluster to use the | |
305 | * default port. If the transport type is unix, then 'port' should not be | |
306 | * specified. | |
307 | * | |
d5cf4079 | 308 | * 'volume' is the name of the gluster volume which contains the VM image. |
8d6d89cb | 309 | * |
d5cf4079 | 310 | * 'path' is the path to the actual VM image that resides on gluster volume. |
8d6d89cb BR |
311 | * |
312 | * Examples: | |
313 | * | |
314 | * file=gluster://1.2.3.4/testvol/a.img | |
315 | * file=gluster+tcp://1.2.3.4/testvol/a.img | |
316 | * file=gluster+tcp://1.2.3.4:24007/testvol/dir/a.img | |
d5cf4079 | 317 | * file=gluster+tcp://host.domain.com:24007/testvol/dir/a.img |
8d6d89cb | 318 | * file=gluster+unix:///testvol/dir/a.img?socket=/tmp/glusterd.socket |
8d6d89cb | 319 | */ |
7edac2dd PKK |
320 | static int qemu_gluster_parse_uri(BlockdevOptionsGluster *gconf, |
321 | const char *filename) | |
8d6d89cb | 322 | { |
7edac2dd | 323 | GlusterServer *gsconf; |
8d6d89cb BR |
324 | URI *uri; |
325 | QueryParams *qp = NULL; | |
326 | bool is_unix = false; | |
327 | int ret = 0; | |
328 | ||
329 | uri = uri_parse(filename); | |
330 | if (!uri) { | |
331 | return -EINVAL; | |
332 | } | |
333 | ||
6c7189bb PKK |
334 | gconf->server = g_new0(GlusterServerList, 1); |
335 | gconf->server->value = gsconf = g_new0(GlusterServer, 1); | |
7edac2dd | 336 | |
8d6d89cb | 337 | /* transport */ |
24897a76 | 338 | if (!uri->scheme || !strcmp(uri->scheme, "gluster")) { |
7edac2dd | 339 | gsconf->type = GLUSTER_TRANSPORT_TCP; |
8d6d89cb | 340 | } else if (!strcmp(uri->scheme, "gluster+tcp")) { |
7edac2dd | 341 | gsconf->type = GLUSTER_TRANSPORT_TCP; |
8d6d89cb | 342 | } else if (!strcmp(uri->scheme, "gluster+unix")) { |
7edac2dd | 343 | gsconf->type = GLUSTER_TRANSPORT_UNIX; |
8d6d89cb BR |
344 | is_unix = true; |
345 | } else if (!strcmp(uri->scheme, "gluster+rdma")) { | |
7edac2dd | 346 | gsconf->type = GLUSTER_TRANSPORT_TCP; |
0552ff24 PKK |
347 | error_report("Warning: rdma feature is not supported, falling " |
348 | "back to tcp"); | |
8d6d89cb BR |
349 | } else { |
350 | ret = -EINVAL; | |
351 | goto out; | |
352 | } | |
353 | ||
354 | ret = parse_volume_options(gconf, uri->path); | |
355 | if (ret < 0) { | |
356 | goto out; | |
357 | } | |
358 | ||
359 | qp = query_params_parse(uri->query); | |
360 | if (qp->n > 1 || (is_unix && !qp->n) || (!is_unix && qp->n)) { | |
361 | ret = -EINVAL; | |
362 | goto out; | |
363 | } | |
364 | ||
365 | if (is_unix) { | |
366 | if (uri->server || uri->port) { | |
367 | ret = -EINVAL; | |
368 | goto out; | |
369 | } | |
370 | if (strcmp(qp->p[0].name, "socket")) { | |
371 | ret = -EINVAL; | |
372 | goto out; | |
373 | } | |
7edac2dd | 374 | gsconf->u.q_unix.path = g_strdup(qp->p[0].value); |
8d6d89cb | 375 | } else { |
7edac2dd PKK |
376 | gsconf->u.tcp.host = g_strdup(uri->server ? uri->server : "localhost"); |
377 | if (uri->port) { | |
378 | gsconf->u.tcp.port = g_strdup_printf("%d", uri->port); | |
379 | } else { | |
380 | gsconf->u.tcp.port = g_strdup_printf("%d", GLUSTER_DEFAULT_PORT); | |
381 | } | |
8d6d89cb BR |
382 | } |
383 | ||
384 | out: | |
385 | if (qp) { | |
386 | query_params_free(qp); | |
387 | } | |
388 | uri_free(uri); | |
389 | return ret; | |
390 | } | |
391 | ||
6c7189bb PKK |
392 | static struct glfs *qemu_gluster_glfs_init(BlockdevOptionsGluster *gconf, |
393 | Error **errp) | |
8d6d89cb | 394 | { |
6c7189bb | 395 | struct glfs *glfs; |
8d6d89cb BR |
396 | int ret; |
397 | int old_errno; | |
6c7189bb | 398 | GlusterServerList *server; |
c56ac33b | 399 | unsigned long long port; |
8d6d89cb | 400 | |
6349c154 PKK |
401 | glfs = glfs_find_preopened(gconf->volume); |
402 | if (glfs) { | |
403 | return glfs; | |
404 | } | |
405 | ||
d5cf4079 | 406 | glfs = glfs_new(gconf->volume); |
8d6d89cb BR |
407 | if (!glfs) { |
408 | goto out; | |
409 | } | |
410 | ||
6349c154 PKK |
411 | glfs_set_preopened(gconf->volume, glfs); |
412 | ||
6c7189bb PKK |
413 | for (server = gconf->server; server; server = server->next) { |
414 | if (server->value->type == GLUSTER_TRANSPORT_UNIX) { | |
415 | ret = glfs_set_volfile_server(glfs, | |
416 | GlusterTransport_lookup[server->value->type], | |
417 | server->value->u.q_unix.path, 0); | |
418 | } else { | |
c56ac33b PKK |
419 | if (parse_uint_full(server->value->u.tcp.port, &port, 10) < 0 || |
420 | port > 65535) { | |
421 | error_setg(errp, "'%s' is not a valid port number", | |
422 | server->value->u.tcp.port); | |
423 | errno = EINVAL; | |
424 | goto out; | |
425 | } | |
6c7189bb PKK |
426 | ret = glfs_set_volfile_server(glfs, |
427 | GlusterTransport_lookup[server->value->type], | |
428 | server->value->u.tcp.host, | |
c56ac33b | 429 | (int)port); |
6c7189bb PKK |
430 | } |
431 | ||
432 | if (ret < 0) { | |
433 | goto out; | |
434 | } | |
8d6d89cb BR |
435 | } |
436 | ||
1a417e46 | 437 | ret = glfs_set_logging(glfs, gconf->logfile, gconf->debug); |
8d6d89cb BR |
438 | if (ret < 0) { |
439 | goto out; | |
440 | } | |
441 | ||
442 | ret = glfs_init(glfs); | |
443 | if (ret) { | |
6c7189bb PKK |
444 | error_setg(errp, "Gluster connection for volume %s, path %s failed" |
445 | " to connect", gconf->volume, gconf->path); | |
446 | for (server = gconf->server; server; server = server->next) { | |
447 | if (server->value->type == GLUSTER_TRANSPORT_UNIX) { | |
448 | error_append_hint(errp, "hint: failed on socket %s ", | |
449 | server->value->u.q_unix.path); | |
450 | } else { | |
451 | error_append_hint(errp, "hint: failed on host %s and port %s ", | |
452 | server->value->u.tcp.host, | |
453 | server->value->u.tcp.port); | |
454 | } | |
7edac2dd | 455 | } |
4557117d | 456 | |
6c7189bb PKK |
457 | error_append_hint(errp, "Please refer to gluster logs for more info\n"); |
458 | ||
4557117d | 459 | /* glfs_init sometimes doesn't set errno although docs suggest that */ |
7edac2dd | 460 | if (errno == 0) { |
4557117d | 461 | errno = EINVAL; |
7edac2dd | 462 | } |
4557117d | 463 | |
8d6d89cb BR |
464 | goto out; |
465 | } | |
466 | return glfs; | |
467 | ||
468 | out: | |
469 | if (glfs) { | |
470 | old_errno = errno; | |
6349c154 | 471 | glfs_clear_preopened(glfs); |
8d6d89cb BR |
472 | errno = old_errno; |
473 | } | |
474 | return NULL; | |
475 | } | |
476 | ||
6c7189bb PKK |
477 | static int qapi_enum_parse(const char *opt) |
478 | { | |
479 | int i; | |
480 | ||
481 | if (!opt) { | |
482 | return GLUSTER_TRANSPORT__MAX; | |
483 | } | |
484 | ||
485 | for (i = 0; i < GLUSTER_TRANSPORT__MAX; i++) { | |
486 | if (!strcmp(opt, GlusterTransport_lookup[i])) { | |
487 | return i; | |
488 | } | |
489 | } | |
490 | ||
491 | return i; | |
492 | } | |
493 | ||
494 | /* | |
495 | * Convert the json formatted command line into qapi. | |
496 | */ | |
497 | static int qemu_gluster_parse_json(BlockdevOptionsGluster *gconf, | |
498 | QDict *options, Error **errp) | |
499 | { | |
500 | QemuOpts *opts; | |
501 | GlusterServer *gsconf; | |
502 | GlusterServerList *curr = NULL; | |
503 | QDict *backing_options = NULL; | |
504 | Error *local_err = NULL; | |
505 | char *str = NULL; | |
506 | const char *ptr; | |
507 | size_t num_servers; | |
508 | int i; | |
509 | ||
510 | /* create opts info from runtime_json_opts list */ | |
511 | opts = qemu_opts_create(&runtime_json_opts, NULL, 0, &error_abort); | |
512 | qemu_opts_absorb_qdict(opts, options, &local_err); | |
513 | if (local_err) { | |
514 | goto out; | |
515 | } | |
516 | ||
517 | num_servers = qdict_array_entries(options, GLUSTER_OPT_SERVER_PATTERN); | |
518 | if (num_servers < 1) { | |
519 | error_setg(&local_err, QERR_MISSING_PARAMETER, "server"); | |
520 | goto out; | |
521 | } | |
522 | ||
523 | ptr = qemu_opt_get(opts, GLUSTER_OPT_VOLUME); | |
524 | if (!ptr) { | |
525 | error_setg(&local_err, QERR_MISSING_PARAMETER, GLUSTER_OPT_VOLUME); | |
526 | goto out; | |
527 | } | |
528 | gconf->volume = g_strdup(ptr); | |
529 | ||
530 | ptr = qemu_opt_get(opts, GLUSTER_OPT_PATH); | |
531 | if (!ptr) { | |
532 | error_setg(&local_err, QERR_MISSING_PARAMETER, GLUSTER_OPT_PATH); | |
533 | goto out; | |
534 | } | |
535 | gconf->path = g_strdup(ptr); | |
536 | qemu_opts_del(opts); | |
537 | ||
538 | for (i = 0; i < num_servers; i++) { | |
539 | str = g_strdup_printf(GLUSTER_OPT_SERVER_PATTERN"%d.", i); | |
540 | qdict_extract_subqdict(options, &backing_options, str); | |
541 | ||
542 | /* create opts info from runtime_type_opts list */ | |
543 | opts = qemu_opts_create(&runtime_type_opts, NULL, 0, &error_abort); | |
544 | qemu_opts_absorb_qdict(opts, backing_options, &local_err); | |
545 | if (local_err) { | |
546 | goto out; | |
547 | } | |
548 | ||
549 | ptr = qemu_opt_get(opts, GLUSTER_OPT_TYPE); | |
550 | gsconf = g_new0(GlusterServer, 1); | |
551 | gsconf->type = qapi_enum_parse(ptr); | |
552 | if (!ptr) { | |
553 | error_setg(&local_err, QERR_MISSING_PARAMETER, GLUSTER_OPT_TYPE); | |
554 | error_append_hint(&local_err, GERR_INDEX_HINT, i); | |
555 | goto out; | |
556 | ||
557 | } | |
558 | if (gsconf->type == GLUSTER_TRANSPORT__MAX) { | |
559 | error_setg(&local_err, QERR_INVALID_PARAMETER_VALUE, | |
560 | GLUSTER_OPT_TYPE, "tcp or unix"); | |
561 | error_append_hint(&local_err, GERR_INDEX_HINT, i); | |
562 | goto out; | |
563 | } | |
564 | qemu_opts_del(opts); | |
565 | ||
566 | if (gsconf->type == GLUSTER_TRANSPORT_TCP) { | |
567 | /* create opts info from runtime_tcp_opts list */ | |
568 | opts = qemu_opts_create(&runtime_tcp_opts, NULL, 0, &error_abort); | |
569 | qemu_opts_absorb_qdict(opts, backing_options, &local_err); | |
570 | if (local_err) { | |
571 | goto out; | |
572 | } | |
573 | ||
574 | ptr = qemu_opt_get(opts, GLUSTER_OPT_HOST); | |
575 | if (!ptr) { | |
576 | error_setg(&local_err, QERR_MISSING_PARAMETER, | |
577 | GLUSTER_OPT_HOST); | |
578 | error_append_hint(&local_err, GERR_INDEX_HINT, i); | |
579 | goto out; | |
580 | } | |
581 | gsconf->u.tcp.host = g_strdup(ptr); | |
582 | ptr = qemu_opt_get(opts, GLUSTER_OPT_PORT); | |
583 | if (!ptr) { | |
584 | error_setg(&local_err, QERR_MISSING_PARAMETER, | |
585 | GLUSTER_OPT_PORT); | |
586 | error_append_hint(&local_err, GERR_INDEX_HINT, i); | |
587 | goto out; | |
588 | } | |
589 | gsconf->u.tcp.port = g_strdup(ptr); | |
590 | ||
591 | /* defend for unsupported fields in InetSocketAddress, | |
592 | * i.e. @ipv4, @ipv6 and @to | |
593 | */ | |
594 | ptr = qemu_opt_get(opts, GLUSTER_OPT_TO); | |
595 | if (ptr) { | |
596 | gsconf->u.tcp.has_to = true; | |
597 | } | |
598 | ptr = qemu_opt_get(opts, GLUSTER_OPT_IPV4); | |
599 | if (ptr) { | |
600 | gsconf->u.tcp.has_ipv4 = true; | |
601 | } | |
602 | ptr = qemu_opt_get(opts, GLUSTER_OPT_IPV6); | |
603 | if (ptr) { | |
604 | gsconf->u.tcp.has_ipv6 = true; | |
605 | } | |
606 | if (gsconf->u.tcp.has_to) { | |
607 | error_setg(&local_err, "Parameter 'to' not supported"); | |
608 | goto out; | |
609 | } | |
610 | if (gsconf->u.tcp.has_ipv4 || gsconf->u.tcp.has_ipv6) { | |
611 | error_setg(&local_err, "Parameters 'ipv4/ipv6' not supported"); | |
612 | goto out; | |
613 | } | |
614 | qemu_opts_del(opts); | |
615 | } else { | |
616 | /* create opts info from runtime_unix_opts list */ | |
617 | opts = qemu_opts_create(&runtime_unix_opts, NULL, 0, &error_abort); | |
618 | qemu_opts_absorb_qdict(opts, backing_options, &local_err); | |
619 | if (local_err) { | |
620 | goto out; | |
621 | } | |
622 | ||
623 | ptr = qemu_opt_get(opts, GLUSTER_OPT_SOCKET); | |
624 | if (!ptr) { | |
625 | error_setg(&local_err, QERR_MISSING_PARAMETER, | |
626 | GLUSTER_OPT_SOCKET); | |
627 | error_append_hint(&local_err, GERR_INDEX_HINT, i); | |
628 | goto out; | |
629 | } | |
630 | gsconf->u.q_unix.path = g_strdup(ptr); | |
631 | qemu_opts_del(opts); | |
632 | } | |
633 | ||
634 | if (gconf->server == NULL) { | |
635 | gconf->server = g_new0(GlusterServerList, 1); | |
636 | gconf->server->value = gsconf; | |
637 | curr = gconf->server; | |
638 | } else { | |
639 | curr->next = g_new0(GlusterServerList, 1); | |
640 | curr->next->value = gsconf; | |
641 | curr = curr->next; | |
642 | } | |
643 | ||
644 | qdict_del(backing_options, str); | |
645 | g_free(str); | |
646 | str = NULL; | |
647 | } | |
648 | ||
649 | return 0; | |
650 | ||
651 | out: | |
652 | error_propagate(errp, local_err); | |
653 | qemu_opts_del(opts); | |
654 | if (str) { | |
655 | qdict_del(backing_options, str); | |
656 | g_free(str); | |
657 | } | |
658 | errno = EINVAL; | |
659 | return -errno; | |
660 | } | |
661 | ||
662 | static struct glfs *qemu_gluster_init(BlockdevOptionsGluster *gconf, | |
663 | const char *filename, | |
664 | QDict *options, Error **errp) | |
665 | { | |
666 | int ret; | |
667 | if (filename) { | |
668 | ret = qemu_gluster_parse_uri(gconf, filename); | |
669 | if (ret < 0) { | |
670 | error_setg(errp, "invalid URI"); | |
671 | error_append_hint(errp, "Usage: file=gluster[+transport]://" | |
e9db8ff3 PKK |
672 | "[host[:port]]volume/path[?socket=...]" |
673 | "[,file.debug=N]" | |
674 | "[,file.logfile=/path/filename.log]\n"); | |
6c7189bb PKK |
675 | errno = -ret; |
676 | return NULL; | |
677 | } | |
678 | } else { | |
679 | ret = qemu_gluster_parse_json(gconf, options, errp); | |
680 | if (ret < 0) { | |
681 | error_append_hint(errp, "Usage: " | |
682 | "-drive driver=qcow2,file.driver=gluster," | |
683 | "file.volume=testvol,file.path=/path/a.qcow2" | |
e9db8ff3 PKK |
684 | "[,file.debug=9]" |
685 | "[,file.logfile=/path/filename.log]," | |
686 | "file.server.0.type=tcp," | |
6c7189bb PKK |
687 | "file.server.0.host=1.2.3.4," |
688 | "file.server.0.port=24007," | |
689 | "file.server.1.transport=unix," | |
690 | "file.server.1.socket=/var/run/glusterd.socket ..." | |
691 | "\n"); | |
692 | errno = -ret; | |
693 | return NULL; | |
694 | } | |
695 | ||
696 | } | |
697 | ||
698 | return qemu_gluster_glfs_init(gconf, errp); | |
699 | } | |
700 | ||
7c815372 BR |
701 | /* |
702 | * AIO callback routine called from GlusterFS thread. | |
703 | */ | |
704 | static void gluster_finish_aiocb(struct glfs_fd *fd, ssize_t ret, void *arg) | |
705 | { | |
706 | GlusterAIOCB *acb = (GlusterAIOCB *)arg; | |
707 | ||
708 | if (!ret || ret == acb->size) { | |
709 | acb->ret = 0; /* Success */ | |
710 | } else if (ret < 0) { | |
a8827453 | 711 | acb->ret = -errno; /* Read/Write failed */ |
7c815372 BR |
712 | } else { |
713 | acb->ret = -EIO; /* Partial read/write - fail it */ | |
714 | } | |
715 | ||
1919631e | 716 | aio_co_schedule(acb->aio_context, acb->coroutine); |
7c815372 BR |
717 | } |
718 | ||
1b37b344 JC |
719 | static void qemu_gluster_parse_flags(int bdrv_flags, int *open_flags) |
720 | { | |
721 | assert(open_flags != NULL); | |
722 | ||
723 | *open_flags |= O_BINARY; | |
724 | ||
725 | if (bdrv_flags & BDRV_O_RDWR) { | |
726 | *open_flags |= O_RDWR; | |
727 | } else { | |
728 | *open_flags |= O_RDONLY; | |
729 | } | |
730 | ||
731 | if ((bdrv_flags & BDRV_O_NOCACHE)) { | |
732 | *open_flags |= O_DIRECT; | |
733 | } | |
734 | } | |
735 | ||
947eb203 NV |
736 | /* |
737 | * Do SEEK_DATA/HOLE to detect if it is functional. Older broken versions of | |
738 | * gfapi incorrectly return the current offset when SEEK_DATA/HOLE is used. | |
739 | * - Corrected versions return -1 and set errno to EINVAL. | |
740 | * - Versions that support SEEK_DATA/HOLE correctly, will return -1 and set | |
741 | * errno to ENXIO when SEEK_DATA is called with a position of EOF. | |
742 | */ | |
743 | static bool qemu_gluster_test_seek(struct glfs_fd *fd) | |
744 | { | |
d9b78974 JC |
745 | off_t ret = 0; |
746 | ||
747 | #if defined SEEK_HOLE && defined SEEK_DATA | |
748 | off_t eof; | |
947eb203 NV |
749 | |
750 | eof = glfs_lseek(fd, 0, SEEK_END); | |
751 | if (eof < 0) { | |
752 | /* this should never occur */ | |
753 | return false; | |
754 | } | |
755 | ||
756 | /* this should always fail with ENXIO if SEEK_DATA is supported */ | |
757 | ret = glfs_lseek(fd, eof, SEEK_DATA); | |
d9b78974 JC |
758 | #endif |
759 | ||
947eb203 NV |
760 | return (ret < 0) && (errno == ENXIO); |
761 | } | |
762 | ||
56d1b4d2 | 763 | static int qemu_gluster_open(BlockDriverState *bs, QDict *options, |
015a1036 | 764 | int bdrv_flags, Error **errp) |
8d6d89cb BR |
765 | { |
766 | BDRVGlusterState *s = bs->opaque; | |
1b37b344 | 767 | int open_flags = 0; |
8d6d89cb | 768 | int ret = 0; |
7edac2dd | 769 | BlockdevOptionsGluster *gconf = NULL; |
b4894776 KW |
770 | QemuOpts *opts; |
771 | Error *local_err = NULL; | |
e9db8ff3 | 772 | const char *filename, *logfile; |
b4894776 | 773 | |
87ea75d5 | 774 | opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort); |
b4894776 | 775 | qemu_opts_absorb_qdict(opts, options, &local_err); |
84d18f06 | 776 | if (local_err) { |
a7451cb8 | 777 | error_propagate(errp, local_err); |
b4894776 KW |
778 | ret = -EINVAL; |
779 | goto out; | |
780 | } | |
781 | ||
7eac868a JC |
782 | filename = qemu_opt_get(opts, GLUSTER_OPT_FILENAME); |
783 | ||
1a417e46 PKK |
784 | s->debug = qemu_opt_get_number(opts, GLUSTER_OPT_DEBUG, |
785 | GLUSTER_DEBUG_DEFAULT); | |
786 | if (s->debug < 0) { | |
787 | s->debug = 0; | |
788 | } else if (s->debug > GLUSTER_DEBUG_MAX) { | |
789 | s->debug = GLUSTER_DEBUG_MAX; | |
7eac868a | 790 | } |
b4894776 | 791 | |
7edac2dd | 792 | gconf = g_new0(BlockdevOptionsGluster, 1); |
1a417e46 PKK |
793 | gconf->debug = s->debug; |
794 | gconf->has_debug = true; | |
e9db8ff3 PKK |
795 | |
796 | logfile = qemu_opt_get(opts, GLUSTER_OPT_LOGFILE); | |
797 | s->logfile = g_strdup(logfile ? logfile : GLUSTER_LOGFILE_DEFAULT); | |
798 | ||
799 | gconf->logfile = g_strdup(s->logfile); | |
800 | gconf->has_logfile = true; | |
801 | ||
6c7189bb | 802 | s->glfs = qemu_gluster_init(gconf, filename, options, errp); |
8d6d89cb BR |
803 | if (!s->glfs) { |
804 | ret = -errno; | |
805 | goto out; | |
806 | } | |
807 | ||
d85fa9eb JC |
808 | #ifdef CONFIG_GLUSTERFS_XLATOR_OPT |
809 | /* Without this, if fsync fails for a recoverable reason (for instance, | |
810 | * ENOSPC), gluster will dump its cache, preventing retries. This means | |
811 | * almost certain data loss. Not all gluster versions support the | |
812 | * 'resync-failed-syncs-after-fsync' key value, but there is no way to | |
813 | * discover during runtime if it is supported (this api returns success for | |
814 | * unknown key/value pairs) */ | |
815 | ret = glfs_set_xlator_option(s->glfs, "*-write-behind", | |
816 | "resync-failed-syncs-after-fsync", | |
817 | "on"); | |
818 | if (ret < 0) { | |
819 | error_setg_errno(errp, errno, "Unable to set xlator key/value pair"); | |
820 | ret = -errno; | |
821 | goto out; | |
822 | } | |
823 | #endif | |
824 | ||
1b37b344 | 825 | qemu_gluster_parse_flags(bdrv_flags, &open_flags); |
8d6d89cb | 826 | |
d5cf4079 | 827 | s->fd = glfs_open(s->glfs, gconf->path, open_flags); |
8d6d89cb BR |
828 | if (!s->fd) { |
829 | ret = -errno; | |
8d6d89cb | 830 | } |
8d6d89cb | 831 | |
947eb203 NV |
832 | s->supports_seek_data = qemu_gluster_test_seek(s->fd); |
833 | ||
8d6d89cb | 834 | out: |
b4894776 | 835 | qemu_opts_del(opts); |
7edac2dd | 836 | qapi_free_BlockdevOptionsGluster(gconf); |
8d6d89cb BR |
837 | if (!ret) { |
838 | return ret; | |
839 | } | |
e9db8ff3 | 840 | g_free(s->logfile); |
8d6d89cb BR |
841 | if (s->fd) { |
842 | glfs_close(s->fd); | |
843 | } | |
6349c154 PKK |
844 | |
845 | glfs_clear_preopened(s->glfs); | |
846 | ||
8d6d89cb BR |
847 | return ret; |
848 | } | |
849 | ||
adccfbcd JC |
850 | static int qemu_gluster_reopen_prepare(BDRVReopenState *state, |
851 | BlockReopenQueue *queue, Error **errp) | |
852 | { | |
853 | int ret = 0; | |
7eac868a | 854 | BDRVGlusterState *s; |
adccfbcd | 855 | BDRVGlusterReopenState *reop_s; |
7edac2dd | 856 | BlockdevOptionsGluster *gconf; |
adccfbcd JC |
857 | int open_flags = 0; |
858 | ||
859 | assert(state != NULL); | |
860 | assert(state->bs != NULL); | |
861 | ||
7eac868a JC |
862 | s = state->bs->opaque; |
863 | ||
5839e53b | 864 | state->opaque = g_new0(BDRVGlusterReopenState, 1); |
adccfbcd JC |
865 | reop_s = state->opaque; |
866 | ||
867 | qemu_gluster_parse_flags(state->flags, &open_flags); | |
868 | ||
7edac2dd | 869 | gconf = g_new0(BlockdevOptionsGluster, 1); |
1a417e46 PKK |
870 | gconf->debug = s->debug; |
871 | gconf->has_debug = true; | |
e9db8ff3 PKK |
872 | gconf->logfile = g_strdup(s->logfile); |
873 | gconf->has_logfile = true; | |
6c7189bb | 874 | reop_s->glfs = qemu_gluster_init(gconf, state->bs->filename, NULL, errp); |
adccfbcd JC |
875 | if (reop_s->glfs == NULL) { |
876 | ret = -errno; | |
877 | goto exit; | |
878 | } | |
879 | ||
d85fa9eb JC |
880 | #ifdef CONFIG_GLUSTERFS_XLATOR_OPT |
881 | ret = glfs_set_xlator_option(reop_s->glfs, "*-write-behind", | |
882 | "resync-failed-syncs-after-fsync", "on"); | |
883 | if (ret < 0) { | |
884 | error_setg_errno(errp, errno, "Unable to set xlator key/value pair"); | |
885 | ret = -errno; | |
886 | goto exit; | |
887 | } | |
888 | #endif | |
889 | ||
d5cf4079 | 890 | reop_s->fd = glfs_open(reop_s->glfs, gconf->path, open_flags); |
adccfbcd JC |
891 | if (reop_s->fd == NULL) { |
892 | /* reops->glfs will be cleaned up in _abort */ | |
893 | ret = -errno; | |
894 | goto exit; | |
895 | } | |
896 | ||
897 | exit: | |
898 | /* state->opaque will be freed in either the _abort or _commit */ | |
7edac2dd | 899 | qapi_free_BlockdevOptionsGluster(gconf); |
adccfbcd JC |
900 | return ret; |
901 | } | |
902 | ||
903 | static void qemu_gluster_reopen_commit(BDRVReopenState *state) | |
904 | { | |
905 | BDRVGlusterReopenState *reop_s = state->opaque; | |
906 | BDRVGlusterState *s = state->bs->opaque; | |
907 | ||
908 | ||
909 | /* close the old */ | |
910 | if (s->fd) { | |
911 | glfs_close(s->fd); | |
912 | } | |
6349c154 PKK |
913 | |
914 | glfs_clear_preopened(s->glfs); | |
adccfbcd JC |
915 | |
916 | /* use the newly opened image / connection */ | |
917 | s->fd = reop_s->fd; | |
918 | s->glfs = reop_s->glfs; | |
919 | ||
920 | g_free(state->opaque); | |
921 | state->opaque = NULL; | |
922 | ||
923 | return; | |
924 | } | |
925 | ||
926 | ||
927 | static void qemu_gluster_reopen_abort(BDRVReopenState *state) | |
928 | { | |
929 | BDRVGlusterReopenState *reop_s = state->opaque; | |
930 | ||
931 | if (reop_s == NULL) { | |
932 | return; | |
933 | } | |
934 | ||
935 | if (reop_s->fd) { | |
936 | glfs_close(reop_s->fd); | |
937 | } | |
938 | ||
6349c154 | 939 | glfs_clear_preopened(reop_s->glfs); |
adccfbcd JC |
940 | |
941 | g_free(state->opaque); | |
942 | state->opaque = NULL; | |
943 | ||
944 | return; | |
945 | } | |
946 | ||
7c815372 | 947 | #ifdef CONFIG_GLUSTERFS_ZEROFILL |
e88a36eb | 948 | static coroutine_fn int qemu_gluster_co_pwrite_zeroes(BlockDriverState *bs, |
f70c50c8 PKK |
949 | int64_t offset, |
950 | int size, | |
951 | BdrvRequestFlags flags) | |
7c815372 BR |
952 | { |
953 | int ret; | |
c833d1e8 | 954 | GlusterAIOCB acb; |
7c815372 | 955 | BDRVGlusterState *s = bs->opaque; |
7c815372 | 956 | |
c833d1e8 PB |
957 | acb.size = size; |
958 | acb.ret = 0; | |
959 | acb.coroutine = qemu_coroutine_self(); | |
960 | acb.aio_context = bdrv_get_aio_context(bs); | |
7c815372 | 961 | |
c833d1e8 | 962 | ret = glfs_zerofill_async(s->fd, offset, size, gluster_finish_aiocb, &acb); |
7c815372 | 963 | if (ret < 0) { |
c833d1e8 | 964 | return -errno; |
7c815372 BR |
965 | } |
966 | ||
967 | qemu_coroutine_yield(); | |
c833d1e8 | 968 | return acb.ret; |
7c815372 | 969 | } |
cf7f616b BR |
970 | |
971 | static inline bool gluster_supports_zerofill(void) | |
972 | { | |
973 | return 1; | |
974 | } | |
975 | ||
976 | static inline int qemu_gluster_zerofill(struct glfs_fd *fd, int64_t offset, | |
f70c50c8 | 977 | int64_t size) |
cf7f616b BR |
978 | { |
979 | return glfs_zerofill(fd, offset, size); | |
980 | } | |
981 | ||
982 | #else | |
983 | static inline bool gluster_supports_zerofill(void) | |
984 | { | |
985 | return 0; | |
986 | } | |
987 | ||
988 | static inline int qemu_gluster_zerofill(struct glfs_fd *fd, int64_t offset, | |
f70c50c8 | 989 | int64_t size) |
cf7f616b BR |
990 | { |
991 | return 0; | |
992 | } | |
7c815372 BR |
993 | #endif |
994 | ||
8d6d89cb | 995 | static int qemu_gluster_create(const char *filename, |
90c772de | 996 | QemuOpts *opts, Error **errp) |
8d6d89cb | 997 | { |
7edac2dd | 998 | BlockdevOptionsGluster *gconf; |
8d6d89cb BR |
999 | struct glfs *glfs; |
1000 | struct glfs_fd *fd; | |
1001 | int ret = 0; | |
cf7f616b | 1002 | int prealloc = 0; |
8d6d89cb | 1003 | int64_t total_size = 0; |
90c772de | 1004 | char *tmp = NULL; |
8d6d89cb | 1005 | |
7edac2dd | 1006 | gconf = g_new0(BlockdevOptionsGluster, 1); |
1a417e46 PKK |
1007 | gconf->debug = qemu_opt_get_number_del(opts, GLUSTER_OPT_DEBUG, |
1008 | GLUSTER_DEBUG_DEFAULT); | |
1009 | if (gconf->debug < 0) { | |
1010 | gconf->debug = 0; | |
1011 | } else if (gconf->debug > GLUSTER_DEBUG_MAX) { | |
1012 | gconf->debug = GLUSTER_DEBUG_MAX; | |
1013 | } | |
1014 | gconf->has_debug = true; | |
7eac868a | 1015 | |
e9db8ff3 PKK |
1016 | gconf->logfile = qemu_opt_get_del(opts, GLUSTER_OPT_LOGFILE); |
1017 | if (!gconf->logfile) { | |
1018 | gconf->logfile = g_strdup(GLUSTER_LOGFILE_DEFAULT); | |
1019 | } | |
1020 | gconf->has_logfile = true; | |
1021 | ||
6c7189bb | 1022 | glfs = qemu_gluster_init(gconf, filename, NULL, errp); |
8d6d89cb | 1023 | if (!glfs) { |
4557117d | 1024 | ret = -errno; |
8d6d89cb BR |
1025 | goto out; |
1026 | } | |
1027 | ||
180e9526 HT |
1028 | total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), |
1029 | BDRV_SECTOR_SIZE); | |
90c772de CL |
1030 | |
1031 | tmp = qemu_opt_get_del(opts, BLOCK_OPT_PREALLOC); | |
1032 | if (!tmp || !strcmp(tmp, "off")) { | |
1033 | prealloc = 0; | |
f70c50c8 | 1034 | } else if (!strcmp(tmp, "full") && gluster_supports_zerofill()) { |
90c772de CL |
1035 | prealloc = 1; |
1036 | } else { | |
1037 | error_setg(errp, "Invalid preallocation mode: '%s'" | |
f70c50c8 | 1038 | " or GlusterFS doesn't support zerofill API", tmp); |
90c772de CL |
1039 | ret = -EINVAL; |
1040 | goto out; | |
8d6d89cb BR |
1041 | } |
1042 | ||
d5cf4079 | 1043 | fd = glfs_creat(glfs, gconf->path, |
f70c50c8 | 1044 | O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, S_IRUSR | S_IWUSR); |
8d6d89cb BR |
1045 | if (!fd) { |
1046 | ret = -errno; | |
1047 | } else { | |
180e9526 HT |
1048 | if (!glfs_ftruncate(fd, total_size)) { |
1049 | if (prealloc && qemu_gluster_zerofill(fd, 0, total_size)) { | |
cf7f616b BR |
1050 | ret = -errno; |
1051 | } | |
1052 | } else { | |
8d6d89cb BR |
1053 | ret = -errno; |
1054 | } | |
cf7f616b | 1055 | |
8d6d89cb BR |
1056 | if (glfs_close(fd) != 0) { |
1057 | ret = -errno; | |
1058 | } | |
1059 | } | |
1060 | out: | |
90c772de | 1061 | g_free(tmp); |
7edac2dd | 1062 | qapi_free_BlockdevOptionsGluster(gconf); |
6349c154 | 1063 | glfs_clear_preopened(glfs); |
8d6d89cb BR |
1064 | return ret; |
1065 | } | |
1066 | ||
15744b0b | 1067 | static coroutine_fn int qemu_gluster_co_rw(BlockDriverState *bs, |
f70c50c8 PKK |
1068 | int64_t sector_num, int nb_sectors, |
1069 | QEMUIOVector *qiov, int write) | |
8d6d89cb BR |
1070 | { |
1071 | int ret; | |
c833d1e8 | 1072 | GlusterAIOCB acb; |
8d6d89cb | 1073 | BDRVGlusterState *s = bs->opaque; |
15744b0b BR |
1074 | size_t size = nb_sectors * BDRV_SECTOR_SIZE; |
1075 | off_t offset = sector_num * BDRV_SECTOR_SIZE; | |
8d6d89cb | 1076 | |
c833d1e8 PB |
1077 | acb.size = size; |
1078 | acb.ret = 0; | |
1079 | acb.coroutine = qemu_coroutine_self(); | |
1080 | acb.aio_context = bdrv_get_aio_context(bs); | |
8d6d89cb BR |
1081 | |
1082 | if (write) { | |
1083 | ret = glfs_pwritev_async(s->fd, qiov->iov, qiov->niov, offset, 0, | |
f70c50c8 | 1084 | gluster_finish_aiocb, &acb); |
8d6d89cb BR |
1085 | } else { |
1086 | ret = glfs_preadv_async(s->fd, qiov->iov, qiov->niov, offset, 0, | |
f70c50c8 | 1087 | gluster_finish_aiocb, &acb); |
8d6d89cb BR |
1088 | } |
1089 | ||
1090 | if (ret < 0) { | |
c833d1e8 | 1091 | return -errno; |
8d6d89cb | 1092 | } |
15744b0b BR |
1093 | |
1094 | qemu_coroutine_yield(); | |
c833d1e8 | 1095 | return acb.ret; |
8d6d89cb BR |
1096 | } |
1097 | ||
42ec24e2 PB |
1098 | static int qemu_gluster_truncate(BlockDriverState *bs, int64_t offset) |
1099 | { | |
1100 | int ret; | |
1101 | BDRVGlusterState *s = bs->opaque; | |
1102 | ||
1103 | ret = glfs_ftruncate(s->fd, offset); | |
1104 | if (ret < 0) { | |
1105 | return -errno; | |
1106 | } | |
1107 | ||
1108 | return 0; | |
1109 | } | |
1110 | ||
15744b0b | 1111 | static coroutine_fn int qemu_gluster_co_readv(BlockDriverState *bs, |
f70c50c8 PKK |
1112 | int64_t sector_num, |
1113 | int nb_sectors, | |
1114 | QEMUIOVector *qiov) | |
8d6d89cb | 1115 | { |
15744b0b | 1116 | return qemu_gluster_co_rw(bs, sector_num, nb_sectors, qiov, 0); |
8d6d89cb BR |
1117 | } |
1118 | ||
15744b0b | 1119 | static coroutine_fn int qemu_gluster_co_writev(BlockDriverState *bs, |
f70c50c8 PKK |
1120 | int64_t sector_num, |
1121 | int nb_sectors, | |
1122 | QEMUIOVector *qiov) | |
8d6d89cb | 1123 | { |
15744b0b | 1124 | return qemu_gluster_co_rw(bs, sector_num, nb_sectors, qiov, 1); |
8d6d89cb BR |
1125 | } |
1126 | ||
5d4343e6 JC |
1127 | static void qemu_gluster_close(BlockDriverState *bs) |
1128 | { | |
1129 | BDRVGlusterState *s = bs->opaque; | |
1130 | ||
e9db8ff3 | 1131 | g_free(s->logfile); |
5d4343e6 JC |
1132 | if (s->fd) { |
1133 | glfs_close(s->fd); | |
1134 | s->fd = NULL; | |
1135 | } | |
6349c154 | 1136 | glfs_clear_preopened(s->glfs); |
5d4343e6 JC |
1137 | } |
1138 | ||
15744b0b | 1139 | static coroutine_fn int qemu_gluster_co_flush_to_disk(BlockDriverState *bs) |
8d6d89cb BR |
1140 | { |
1141 | int ret; | |
c833d1e8 | 1142 | GlusterAIOCB acb; |
8d6d89cb BR |
1143 | BDRVGlusterState *s = bs->opaque; |
1144 | ||
c833d1e8 PB |
1145 | acb.size = 0; |
1146 | acb.ret = 0; | |
1147 | acb.coroutine = qemu_coroutine_self(); | |
1148 | acb.aio_context = bdrv_get_aio_context(bs); | |
8d6d89cb | 1149 | |
c833d1e8 | 1150 | ret = glfs_fsync_async(s->fd, gluster_finish_aiocb, &acb); |
8d6d89cb | 1151 | if (ret < 0) { |
d85fa9eb JC |
1152 | ret = -errno; |
1153 | goto error; | |
8d6d89cb | 1154 | } |
15744b0b BR |
1155 | |
1156 | qemu_coroutine_yield(); | |
d85fa9eb JC |
1157 | if (acb.ret < 0) { |
1158 | ret = acb.ret; | |
1159 | goto error; | |
1160 | } | |
1161 | ||
c833d1e8 | 1162 | return acb.ret; |
d85fa9eb JC |
1163 | |
1164 | error: | |
1165 | /* Some versions of Gluster (3.5.6 -> 3.5.8?) will not retain its cache | |
1166 | * after a fsync failure, so we have no way of allowing the guest to safely | |
1167 | * continue. Gluster versions prior to 3.5.6 don't retain the cache | |
1168 | * either, but will invalidate the fd on error, so this is again our only | |
1169 | * option. | |
1170 | * | |
1171 | * The 'resync-failed-syncs-after-fsync' xlator option for the | |
1172 | * write-behind cache will cause later gluster versions to retain its | |
1173 | * cache after error, so long as the fd remains open. However, we | |
1174 | * currently have no way of knowing if this option is supported. | |
1175 | * | |
1176 | * TODO: Once gluster provides a way for us to determine if the option | |
1177 | * is supported, bypass the closure and setting drv to NULL. */ | |
1178 | qemu_gluster_close(bs); | |
1179 | bs->drv = NULL; | |
1180 | return ret; | |
8d6d89cb BR |
1181 | } |
1182 | ||
0c14fb47 | 1183 | #ifdef CONFIG_GLUSTERFS_DISCARD |
1014170b EB |
1184 | static coroutine_fn int qemu_gluster_co_pdiscard(BlockDriverState *bs, |
1185 | int64_t offset, int size) | |
0c14fb47 BR |
1186 | { |
1187 | int ret; | |
c833d1e8 | 1188 | GlusterAIOCB acb; |
0c14fb47 | 1189 | BDRVGlusterState *s = bs->opaque; |
0c14fb47 | 1190 | |
c833d1e8 PB |
1191 | acb.size = 0; |
1192 | acb.ret = 0; | |
1193 | acb.coroutine = qemu_coroutine_self(); | |
1194 | acb.aio_context = bdrv_get_aio_context(bs); | |
0c14fb47 | 1195 | |
c833d1e8 | 1196 | ret = glfs_discard_async(s->fd, offset, size, gluster_finish_aiocb, &acb); |
0c14fb47 | 1197 | if (ret < 0) { |
c833d1e8 | 1198 | return -errno; |
0c14fb47 | 1199 | } |
15744b0b BR |
1200 | |
1201 | qemu_coroutine_yield(); | |
c833d1e8 | 1202 | return acb.ret; |
0c14fb47 BR |
1203 | } |
1204 | #endif | |
1205 | ||
8d6d89cb BR |
1206 | static int64_t qemu_gluster_getlength(BlockDriverState *bs) |
1207 | { | |
1208 | BDRVGlusterState *s = bs->opaque; | |
1209 | int64_t ret; | |
1210 | ||
1211 | ret = glfs_lseek(s->fd, 0, SEEK_END); | |
1212 | if (ret < 0) { | |
1213 | return -errno; | |
1214 | } else { | |
1215 | return ret; | |
1216 | } | |
1217 | } | |
1218 | ||
1219 | static int64_t qemu_gluster_allocated_file_size(BlockDriverState *bs) | |
1220 | { | |
1221 | BDRVGlusterState *s = bs->opaque; | |
1222 | struct stat st; | |
1223 | int ret; | |
1224 | ||
1225 | ret = glfs_fstat(s->fd, &st); | |
1226 | if (ret < 0) { | |
1227 | return -errno; | |
1228 | } else { | |
1229 | return st.st_blocks * 512; | |
1230 | } | |
1231 | } | |
1232 | ||
8ab6feec KW |
1233 | static int qemu_gluster_has_zero_init(BlockDriverState *bs) |
1234 | { | |
1235 | /* GlusterFS volume could be backed by a block device */ | |
1236 | return 0; | |
1237 | } | |
1238 | ||
947eb203 NV |
1239 | /* |
1240 | * Find allocation range in @bs around offset @start. | |
1241 | * May change underlying file descriptor's file offset. | |
1242 | * If @start is not in a hole, store @start in @data, and the | |
1243 | * beginning of the next hole in @hole, and return 0. | |
1244 | * If @start is in a non-trailing hole, store @start in @hole and the | |
1245 | * beginning of the next non-hole in @data, and return 0. | |
1246 | * If @start is in a trailing hole or beyond EOF, return -ENXIO. | |
1247 | * If we can't find out, return a negative errno other than -ENXIO. | |
1248 | * | |
c1bb86cd | 1249 | * (Shamefully copied from file-posix.c, only miniscule adaptions.) |
947eb203 NV |
1250 | */ |
1251 | static int find_allocation(BlockDriverState *bs, off_t start, | |
1252 | off_t *data, off_t *hole) | |
1253 | { | |
1254 | BDRVGlusterState *s = bs->opaque; | |
947eb203 NV |
1255 | |
1256 | if (!s->supports_seek_data) { | |
d9b78974 | 1257 | goto exit; |
947eb203 NV |
1258 | } |
1259 | ||
d9b78974 JC |
1260 | #if defined SEEK_HOLE && defined SEEK_DATA |
1261 | off_t offs; | |
1262 | ||
947eb203 NV |
1263 | /* |
1264 | * SEEK_DATA cases: | |
1265 | * D1. offs == start: start is in data | |
1266 | * D2. offs > start: start is in a hole, next data at offs | |
1267 | * D3. offs < 0, errno = ENXIO: either start is in a trailing hole | |
1268 | * or start is beyond EOF | |
1269 | * If the latter happens, the file has been truncated behind | |
1270 | * our back since we opened it. All bets are off then. | |
1271 | * Treating like a trailing hole is simplest. | |
1272 | * D4. offs < 0, errno != ENXIO: we learned nothing | |
1273 | */ | |
1274 | offs = glfs_lseek(s->fd, start, SEEK_DATA); | |
1275 | if (offs < 0) { | |
1276 | return -errno; /* D3 or D4 */ | |
1277 | } | |
1278 | assert(offs >= start); | |
1279 | ||
1280 | if (offs > start) { | |
1281 | /* D2: in hole, next data at offs */ | |
1282 | *hole = start; | |
1283 | *data = offs; | |
1284 | return 0; | |
1285 | } | |
1286 | ||
1287 | /* D1: in data, end not yet known */ | |
1288 | ||
1289 | /* | |
1290 | * SEEK_HOLE cases: | |
1291 | * H1. offs == start: start is in a hole | |
1292 | * If this happens here, a hole has been dug behind our back | |
1293 | * since the previous lseek(). | |
1294 | * H2. offs > start: either start is in data, next hole at offs, | |
1295 | * or start is in trailing hole, EOF at offs | |
1296 | * Linux treats trailing holes like any other hole: offs == | |
1297 | * start. Solaris seeks to EOF instead: offs > start (blech). | |
1298 | * If that happens here, a hole has been dug behind our back | |
1299 | * since the previous lseek(). | |
1300 | * H3. offs < 0, errno = ENXIO: start is beyond EOF | |
1301 | * If this happens, the file has been truncated behind our | |
1302 | * back since we opened it. Treat it like a trailing hole. | |
1303 | * H4. offs < 0, errno != ENXIO: we learned nothing | |
1304 | * Pretend we know nothing at all, i.e. "forget" about D1. | |
1305 | */ | |
1306 | offs = glfs_lseek(s->fd, start, SEEK_HOLE); | |
1307 | if (offs < 0) { | |
1308 | return -errno; /* D1 and (H3 or H4) */ | |
1309 | } | |
1310 | assert(offs >= start); | |
1311 | ||
1312 | if (offs > start) { | |
1313 | /* | |
1314 | * D1 and H2: either in data, next hole at offs, or it was in | |
1315 | * data but is now in a trailing hole. In the latter case, | |
1316 | * all bets are off. Treating it as if it there was data all | |
1317 | * the way to EOF is safe, so simply do that. | |
1318 | */ | |
1319 | *data = start; | |
1320 | *hole = offs; | |
1321 | return 0; | |
1322 | } | |
1323 | ||
1324 | /* D1 and H1 */ | |
1325 | return -EBUSY; | |
d9b78974 JC |
1326 | #endif |
1327 | ||
1328 | exit: | |
1329 | return -ENOTSUP; | |
947eb203 NV |
1330 | } |
1331 | ||
1332 | /* | |
1333 | * Returns the allocation status of the specified sectors. | |
1334 | * | |
1335 | * If 'sector_num' is beyond the end of the disk image the return value is 0 | |
1336 | * and 'pnum' is set to 0. | |
1337 | * | |
1338 | * 'pnum' is set to the number of sectors (including and immediately following | |
1339 | * the specified sector) that are known to be in the same | |
1340 | * allocated/unallocated state. | |
1341 | * | |
1342 | * 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes | |
1343 | * beyond the end of the disk image it will be clamped. | |
1344 | * | |
c1bb86cd | 1345 | * (Based on raw_co_get_block_status() from file-posix.c.) |
947eb203 NV |
1346 | */ |
1347 | static int64_t coroutine_fn qemu_gluster_co_get_block_status( | |
1348 | BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum, | |
1349 | BlockDriverState **file) | |
1350 | { | |
1351 | BDRVGlusterState *s = bs->opaque; | |
1352 | off_t start, data = 0, hole = 0; | |
1353 | int64_t total_size; | |
1354 | int ret = -EINVAL; | |
1355 | ||
1356 | if (!s->fd) { | |
1357 | return ret; | |
1358 | } | |
1359 | ||
1360 | start = sector_num * BDRV_SECTOR_SIZE; | |
1361 | total_size = bdrv_getlength(bs); | |
1362 | if (total_size < 0) { | |
1363 | return total_size; | |
1364 | } else if (start >= total_size) { | |
1365 | *pnum = 0; | |
1366 | return 0; | |
1367 | } else if (start + nb_sectors * BDRV_SECTOR_SIZE > total_size) { | |
1368 | nb_sectors = DIV_ROUND_UP(total_size - start, BDRV_SECTOR_SIZE); | |
1369 | } | |
1370 | ||
1371 | ret = find_allocation(bs, start, &data, &hole); | |
1372 | if (ret == -ENXIO) { | |
1373 | /* Trailing hole */ | |
1374 | *pnum = nb_sectors; | |
1375 | ret = BDRV_BLOCK_ZERO; | |
1376 | } else if (ret < 0) { | |
1377 | /* No info available, so pretend there are no holes */ | |
1378 | *pnum = nb_sectors; | |
1379 | ret = BDRV_BLOCK_DATA; | |
1380 | } else if (data == start) { | |
1381 | /* On a data extent, compute sectors to the end of the extent, | |
1382 | * possibly including a partial sector at EOF. */ | |
1383 | *pnum = MIN(nb_sectors, DIV_ROUND_UP(hole - start, BDRV_SECTOR_SIZE)); | |
1384 | ret = BDRV_BLOCK_DATA; | |
1385 | } else { | |
1386 | /* On a hole, compute sectors to the beginning of the next extent. */ | |
1387 | assert(hole == start); | |
1388 | *pnum = MIN(nb_sectors, (data - start) / BDRV_SECTOR_SIZE); | |
1389 | ret = BDRV_BLOCK_ZERO; | |
1390 | } | |
1391 | ||
1392 | *file = bs; | |
1393 | ||
1394 | return ret | BDRV_BLOCK_OFFSET_VALID | start; | |
1395 | } | |
1396 | ||
1397 | ||
8d6d89cb BR |
1398 | static BlockDriver bdrv_gluster = { |
1399 | .format_name = "gluster", | |
1400 | .protocol_name = "gluster", | |
1401 | .instance_size = sizeof(BDRVGlusterState), | |
6c7189bb | 1402 | .bdrv_needs_filename = false, |
8d6d89cb | 1403 | .bdrv_file_open = qemu_gluster_open, |
adccfbcd JC |
1404 | .bdrv_reopen_prepare = qemu_gluster_reopen_prepare, |
1405 | .bdrv_reopen_commit = qemu_gluster_reopen_commit, | |
1406 | .bdrv_reopen_abort = qemu_gluster_reopen_abort, | |
8d6d89cb | 1407 | .bdrv_close = qemu_gluster_close, |
c282e1fd | 1408 | .bdrv_create = qemu_gluster_create, |
8d6d89cb BR |
1409 | .bdrv_getlength = qemu_gluster_getlength, |
1410 | .bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size, | |
42ec24e2 | 1411 | .bdrv_truncate = qemu_gluster_truncate, |
15744b0b BR |
1412 | .bdrv_co_readv = qemu_gluster_co_readv, |
1413 | .bdrv_co_writev = qemu_gluster_co_writev, | |
1414 | .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk, | |
8ab6feec | 1415 | .bdrv_has_zero_init = qemu_gluster_has_zero_init, |
0c14fb47 | 1416 | #ifdef CONFIG_GLUSTERFS_DISCARD |
1014170b | 1417 | .bdrv_co_pdiscard = qemu_gluster_co_pdiscard, |
7c815372 BR |
1418 | #endif |
1419 | #ifdef CONFIG_GLUSTERFS_ZEROFILL | |
e88a36eb | 1420 | .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes, |
0c14fb47 | 1421 | #endif |
947eb203 | 1422 | .bdrv_co_get_block_status = qemu_gluster_co_get_block_status, |
90c772de | 1423 | .create_opts = &qemu_gluster_create_opts, |
8d6d89cb BR |
1424 | }; |
1425 | ||
1426 | static BlockDriver bdrv_gluster_tcp = { | |
1427 | .format_name = "gluster", | |
1428 | .protocol_name = "gluster+tcp", | |
1429 | .instance_size = sizeof(BDRVGlusterState), | |
6c7189bb | 1430 | .bdrv_needs_filename = false, |
8d6d89cb | 1431 | .bdrv_file_open = qemu_gluster_open, |
adccfbcd JC |
1432 | .bdrv_reopen_prepare = qemu_gluster_reopen_prepare, |
1433 | .bdrv_reopen_commit = qemu_gluster_reopen_commit, | |
1434 | .bdrv_reopen_abort = qemu_gluster_reopen_abort, | |
8d6d89cb | 1435 | .bdrv_close = qemu_gluster_close, |
c282e1fd | 1436 | .bdrv_create = qemu_gluster_create, |
8d6d89cb BR |
1437 | .bdrv_getlength = qemu_gluster_getlength, |
1438 | .bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size, | |
42ec24e2 | 1439 | .bdrv_truncate = qemu_gluster_truncate, |
15744b0b BR |
1440 | .bdrv_co_readv = qemu_gluster_co_readv, |
1441 | .bdrv_co_writev = qemu_gluster_co_writev, | |
1442 | .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk, | |
8ab6feec | 1443 | .bdrv_has_zero_init = qemu_gluster_has_zero_init, |
0c14fb47 | 1444 | #ifdef CONFIG_GLUSTERFS_DISCARD |
1014170b | 1445 | .bdrv_co_pdiscard = qemu_gluster_co_pdiscard, |
7c815372 BR |
1446 | #endif |
1447 | #ifdef CONFIG_GLUSTERFS_ZEROFILL | |
e88a36eb | 1448 | .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes, |
0c14fb47 | 1449 | #endif |
947eb203 | 1450 | .bdrv_co_get_block_status = qemu_gluster_co_get_block_status, |
90c772de | 1451 | .create_opts = &qemu_gluster_create_opts, |
8d6d89cb BR |
1452 | }; |
1453 | ||
1454 | static BlockDriver bdrv_gluster_unix = { | |
1455 | .format_name = "gluster", | |
1456 | .protocol_name = "gluster+unix", | |
1457 | .instance_size = sizeof(BDRVGlusterState), | |
030be321 | 1458 | .bdrv_needs_filename = true, |
8d6d89cb | 1459 | .bdrv_file_open = qemu_gluster_open, |
adccfbcd JC |
1460 | .bdrv_reopen_prepare = qemu_gluster_reopen_prepare, |
1461 | .bdrv_reopen_commit = qemu_gluster_reopen_commit, | |
1462 | .bdrv_reopen_abort = qemu_gluster_reopen_abort, | |
8d6d89cb | 1463 | .bdrv_close = qemu_gluster_close, |
c282e1fd | 1464 | .bdrv_create = qemu_gluster_create, |
8d6d89cb BR |
1465 | .bdrv_getlength = qemu_gluster_getlength, |
1466 | .bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size, | |
42ec24e2 | 1467 | .bdrv_truncate = qemu_gluster_truncate, |
15744b0b BR |
1468 | .bdrv_co_readv = qemu_gluster_co_readv, |
1469 | .bdrv_co_writev = qemu_gluster_co_writev, | |
1470 | .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk, | |
8ab6feec | 1471 | .bdrv_has_zero_init = qemu_gluster_has_zero_init, |
0c14fb47 | 1472 | #ifdef CONFIG_GLUSTERFS_DISCARD |
1014170b | 1473 | .bdrv_co_pdiscard = qemu_gluster_co_pdiscard, |
7c815372 BR |
1474 | #endif |
1475 | #ifdef CONFIG_GLUSTERFS_ZEROFILL | |
e88a36eb | 1476 | .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes, |
0c14fb47 | 1477 | #endif |
947eb203 | 1478 | .bdrv_co_get_block_status = qemu_gluster_co_get_block_status, |
90c772de | 1479 | .create_opts = &qemu_gluster_create_opts, |
8d6d89cb BR |
1480 | }; |
1481 | ||
0552ff24 PKK |
1482 | /* rdma is deprecated (actually never supported for volfile fetch). |
1483 | * Let's maintain it for the protocol compatibility, to make sure things | |
1484 | * won't break immediately. For now, gluster+rdma will fall back to gluster+tcp | |
1485 | * protocol with a warning. | |
1486 | * TODO: remove gluster+rdma interface support | |
1487 | */ | |
8d6d89cb BR |
1488 | static BlockDriver bdrv_gluster_rdma = { |
1489 | .format_name = "gluster", | |
1490 | .protocol_name = "gluster+rdma", | |
1491 | .instance_size = sizeof(BDRVGlusterState), | |
030be321 | 1492 | .bdrv_needs_filename = true, |
8d6d89cb | 1493 | .bdrv_file_open = qemu_gluster_open, |
adccfbcd JC |
1494 | .bdrv_reopen_prepare = qemu_gluster_reopen_prepare, |
1495 | .bdrv_reopen_commit = qemu_gluster_reopen_commit, | |
1496 | .bdrv_reopen_abort = qemu_gluster_reopen_abort, | |
8d6d89cb | 1497 | .bdrv_close = qemu_gluster_close, |
c282e1fd | 1498 | .bdrv_create = qemu_gluster_create, |
8d6d89cb BR |
1499 | .bdrv_getlength = qemu_gluster_getlength, |
1500 | .bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size, | |
42ec24e2 | 1501 | .bdrv_truncate = qemu_gluster_truncate, |
15744b0b BR |
1502 | .bdrv_co_readv = qemu_gluster_co_readv, |
1503 | .bdrv_co_writev = qemu_gluster_co_writev, | |
1504 | .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk, | |
8ab6feec | 1505 | .bdrv_has_zero_init = qemu_gluster_has_zero_init, |
0c14fb47 | 1506 | #ifdef CONFIG_GLUSTERFS_DISCARD |
1014170b | 1507 | .bdrv_co_pdiscard = qemu_gluster_co_pdiscard, |
7c815372 BR |
1508 | #endif |
1509 | #ifdef CONFIG_GLUSTERFS_ZEROFILL | |
e88a36eb | 1510 | .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes, |
0c14fb47 | 1511 | #endif |
947eb203 | 1512 | .bdrv_co_get_block_status = qemu_gluster_co_get_block_status, |
90c772de | 1513 | .create_opts = &qemu_gluster_create_opts, |
8d6d89cb BR |
1514 | }; |
1515 | ||
1516 | static void bdrv_gluster_init(void) | |
1517 | { | |
1518 | bdrv_register(&bdrv_gluster_rdma); | |
1519 | bdrv_register(&bdrv_gluster_unix); | |
1520 | bdrv_register(&bdrv_gluster_tcp); | |
1521 | bdrv_register(&bdrv_gluster); | |
1522 | } | |
1523 | ||
1524 | block_init(bdrv_gluster_init); |