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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 | */ |
922a01a0 | 10 | |
80c71a24 | 11 | #include "qemu/osdep.h" |
de23e72b | 12 | #include "qemu/units.h" |
8d6d89cb | 13 | #include <glusterfs/api/glfs.h> |
e2c1c34f | 14 | #include "block/block-io.h" |
737e150e | 15 | #include "block/block_int.h" |
609f45ea | 16 | #include "block/qdict.h" |
da34e65c | 17 | #include "qapi/error.h" |
452fcdbc | 18 | #include "qapi/qmp/qdict.h" |
6c7189bb | 19 | #include "qapi/qmp/qerror.h" |
1de7afc9 | 20 | #include "qemu/uri.h" |
0552ff24 | 21 | #include "qemu/error-report.h" |
0b8fa32f | 22 | #include "qemu/module.h" |
922a01a0 | 23 | #include "qemu/option.h" |
c56ac33b | 24 | #include "qemu/cutils.h" |
8d6d89cb | 25 | |
e014dbe7 PKK |
26 | #ifdef CONFIG_GLUSTERFS_FTRUNCATE_HAS_STAT |
27 | # define glfs_ftruncate(fd, offset) glfs_ftruncate(fd, offset, NULL, NULL) | |
28 | #endif | |
29 | ||
f70c50c8 | 30 | #define GLUSTER_OPT_FILENAME "filename" |
6c7189bb PKK |
31 | #define GLUSTER_OPT_VOLUME "volume" |
32 | #define GLUSTER_OPT_PATH "path" | |
33 | #define GLUSTER_OPT_TYPE "type" | |
34 | #define GLUSTER_OPT_SERVER_PATTERN "server." | |
35 | #define GLUSTER_OPT_HOST "host" | |
36 | #define GLUSTER_OPT_PORT "port" | |
37 | #define GLUSTER_OPT_TO "to" | |
38 | #define GLUSTER_OPT_IPV4 "ipv4" | |
39 | #define GLUSTER_OPT_IPV6 "ipv6" | |
40 | #define GLUSTER_OPT_SOCKET "socket" | |
f70c50c8 | 41 | #define GLUSTER_OPT_DEBUG "debug" |
7edac2dd | 42 | #define GLUSTER_DEFAULT_PORT 24007 |
f70c50c8 PKK |
43 | #define GLUSTER_DEBUG_DEFAULT 4 |
44 | #define GLUSTER_DEBUG_MAX 9 | |
e9db8ff3 PKK |
45 | #define GLUSTER_OPT_LOGFILE "logfile" |
46 | #define GLUSTER_LOGFILE_DEFAULT "-" /* handled in libgfapi as /dev/stderr */ | |
de23e72b SG |
47 | /* |
48 | * Several versions of GlusterFS (3.12? -> 6.0.1) fail when the transfer size | |
49 | * is greater or equal to 1024 MiB, so we are limiting the transfer size to 512 | |
50 | * MiB to avoid this rare issue. | |
51 | */ | |
52 | #define GLUSTER_MAX_TRANSFER (512 * MiB) | |
f70c50c8 | 53 | |
6c7189bb | 54 | #define GERR_INDEX_HINT "hint: check in 'server' array index '%d'\n" |
f70c50c8 | 55 | |
8d6d89cb | 56 | typedef struct GlusterAIOCB { |
8d6d89cb BR |
57 | int64_t size; |
58 | int ret; | |
15744b0b | 59 | Coroutine *coroutine; |
6ee50af2 | 60 | AioContext *aio_context; |
8d6d89cb BR |
61 | } GlusterAIOCB; |
62 | ||
63 | typedef struct BDRVGlusterState { | |
64 | struct glfs *glfs; | |
8d6d89cb | 65 | struct glfs_fd *fd; |
e9db8ff3 | 66 | char *logfile; |
947eb203 | 67 | bool supports_seek_data; |
1a417e46 | 68 | int debug; |
8d6d89cb BR |
69 | } BDRVGlusterState; |
70 | ||
f70c50c8 PKK |
71 | typedef struct BDRVGlusterReopenState { |
72 | struct glfs *glfs; | |
73 | struct glfs_fd *fd; | |
74 | } BDRVGlusterReopenState; | |
75 | ||
f70c50c8 | 76 | |
6349c154 PKK |
77 | typedef struct GlfsPreopened { |
78 | char *volume; | |
79 | glfs_t *fs; | |
80 | int ref; | |
81 | } GlfsPreopened; | |
82 | ||
83 | typedef struct ListElement { | |
84 | QLIST_ENTRY(ListElement) list; | |
85 | GlfsPreopened saved; | |
86 | } ListElement; | |
87 | ||
b58deb34 | 88 | static QLIST_HEAD(, ListElement) glfs_list; |
6349c154 | 89 | |
f70c50c8 PKK |
90 | static QemuOptsList qemu_gluster_create_opts = { |
91 | .name = "qemu-gluster-create-opts", | |
92 | .head = QTAILQ_HEAD_INITIALIZER(qemu_gluster_create_opts.head), | |
93 | .desc = { | |
94 | { | |
95 | .name = BLOCK_OPT_SIZE, | |
96 | .type = QEMU_OPT_SIZE, | |
97 | .help = "Virtual disk size" | |
98 | }, | |
99 | { | |
100 | .name = BLOCK_OPT_PREALLOC, | |
101 | .type = QEMU_OPT_STRING, | |
2ea8e96d SG |
102 | .help = "Preallocation mode (allowed values: off" |
103 | #ifdef CONFIG_GLUSTERFS_FALLOCATE | |
104 | ", falloc" | |
105 | #endif | |
106 | #ifdef CONFIG_GLUSTERFS_ZEROFILL | |
107 | ", full" | |
108 | #endif | |
109 | ")" | |
f70c50c8 PKK |
110 | }, |
111 | { | |
112 | .name = GLUSTER_OPT_DEBUG, | |
113 | .type = QEMU_OPT_NUMBER, | |
114 | .help = "Gluster log level, valid range is 0-9", | |
115 | }, | |
e9db8ff3 PKK |
116 | { |
117 | .name = GLUSTER_OPT_LOGFILE, | |
118 | .type = QEMU_OPT_STRING, | |
119 | .help = "Logfile path of libgfapi", | |
120 | }, | |
f70c50c8 PKK |
121 | { /* end of list */ } |
122 | } | |
123 | }; | |
124 | ||
125 | static QemuOptsList runtime_opts = { | |
126 | .name = "gluster", | |
127 | .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), | |
128 | .desc = { | |
129 | { | |
130 | .name = GLUSTER_OPT_FILENAME, | |
131 | .type = QEMU_OPT_STRING, | |
132 | .help = "URL to the gluster image", | |
133 | }, | |
134 | { | |
135 | .name = GLUSTER_OPT_DEBUG, | |
136 | .type = QEMU_OPT_NUMBER, | |
137 | .help = "Gluster log level, valid range is 0-9", | |
138 | }, | |
e9db8ff3 PKK |
139 | { |
140 | .name = GLUSTER_OPT_LOGFILE, | |
141 | .type = QEMU_OPT_STRING, | |
142 | .help = "Logfile path of libgfapi", | |
143 | }, | |
f70c50c8 PKK |
144 | { /* end of list */ } |
145 | }, | |
146 | }; | |
147 | ||
6c7189bb PKK |
148 | static QemuOptsList runtime_json_opts = { |
149 | .name = "gluster_json", | |
150 | .head = QTAILQ_HEAD_INITIALIZER(runtime_json_opts.head), | |
151 | .desc = { | |
152 | { | |
153 | .name = GLUSTER_OPT_VOLUME, | |
154 | .type = QEMU_OPT_STRING, | |
155 | .help = "name of gluster volume where VM image resides", | |
156 | }, | |
157 | { | |
158 | .name = GLUSTER_OPT_PATH, | |
159 | .type = QEMU_OPT_STRING, | |
160 | .help = "absolute path to image file in gluster volume", | |
161 | }, | |
162 | { | |
163 | .name = GLUSTER_OPT_DEBUG, | |
164 | .type = QEMU_OPT_NUMBER, | |
165 | .help = "Gluster log level, valid range is 0-9", | |
166 | }, | |
167 | { /* end of list */ } | |
168 | }, | |
169 | }; | |
170 | ||
171 | static QemuOptsList runtime_type_opts = { | |
172 | .name = "gluster_type", | |
173 | .head = QTAILQ_HEAD_INITIALIZER(runtime_type_opts.head), | |
174 | .desc = { | |
175 | { | |
176 | .name = GLUSTER_OPT_TYPE, | |
177 | .type = QEMU_OPT_STRING, | |
c5f1ae3a | 178 | .help = "inet|unix", |
6c7189bb PKK |
179 | }, |
180 | { /* end of list */ } | |
181 | }, | |
182 | }; | |
183 | ||
184 | static QemuOptsList runtime_unix_opts = { | |
185 | .name = "gluster_unix", | |
186 | .head = QTAILQ_HEAD_INITIALIZER(runtime_unix_opts.head), | |
187 | .desc = { | |
188 | { | |
189 | .name = GLUSTER_OPT_SOCKET, | |
190 | .type = QEMU_OPT_STRING, | |
9dae635a KW |
191 | .help = "socket file path (legacy)", |
192 | }, | |
193 | { | |
194 | .name = GLUSTER_OPT_PATH, | |
195 | .type = QEMU_OPT_STRING, | |
196 | .help = "socket file path (QAPI)", | |
6c7189bb PKK |
197 | }, |
198 | { /* end of list */ } | |
199 | }, | |
200 | }; | |
201 | ||
c5f1ae3a MA |
202 | static QemuOptsList runtime_inet_opts = { |
203 | .name = "gluster_inet", | |
204 | .head = QTAILQ_HEAD_INITIALIZER(runtime_inet_opts.head), | |
6c7189bb PKK |
205 | .desc = { |
206 | { | |
207 | .name = GLUSTER_OPT_TYPE, | |
208 | .type = QEMU_OPT_STRING, | |
c5f1ae3a | 209 | .help = "inet|unix", |
6c7189bb PKK |
210 | }, |
211 | { | |
212 | .name = GLUSTER_OPT_HOST, | |
213 | .type = QEMU_OPT_STRING, | |
214 | .help = "host address (hostname/ipv4/ipv6 addresses)", | |
215 | }, | |
216 | { | |
217 | .name = GLUSTER_OPT_PORT, | |
53d9837f | 218 | .type = QEMU_OPT_STRING, |
6c7189bb PKK |
219 | .help = "port number on which glusterd is listening (default 24007)", |
220 | }, | |
221 | { | |
222 | .name = "to", | |
223 | .type = QEMU_OPT_NUMBER, | |
224 | .help = "max port number, not supported by gluster", | |
225 | }, | |
226 | { | |
227 | .name = "ipv4", | |
228 | .type = QEMU_OPT_BOOL, | |
229 | .help = "ipv4 bool value, not supported by gluster", | |
230 | }, | |
231 | { | |
232 | .name = "ipv6", | |
233 | .type = QEMU_OPT_BOOL, | |
234 | .help = "ipv6 bool value, not supported by gluster", | |
235 | }, | |
236 | { /* end of list */ } | |
237 | }, | |
238 | }; | |
f70c50c8 | 239 | |
6349c154 PKK |
240 | static void glfs_set_preopened(const char *volume, glfs_t *fs) |
241 | { | |
242 | ListElement *entry = NULL; | |
243 | ||
244 | entry = g_new(ListElement, 1); | |
245 | ||
246 | entry->saved.volume = g_strdup(volume); | |
247 | ||
248 | entry->saved.fs = fs; | |
249 | entry->saved.ref = 1; | |
250 | ||
251 | QLIST_INSERT_HEAD(&glfs_list, entry, list); | |
252 | } | |
253 | ||
254 | static glfs_t *glfs_find_preopened(const char *volume) | |
255 | { | |
256 | ListElement *entry = NULL; | |
257 | ||
258 | QLIST_FOREACH(entry, &glfs_list, list) { | |
259 | if (strcmp(entry->saved.volume, volume) == 0) { | |
260 | entry->saved.ref++; | |
261 | return entry->saved.fs; | |
262 | } | |
263 | } | |
264 | ||
265 | return NULL; | |
266 | } | |
267 | ||
268 | static void glfs_clear_preopened(glfs_t *fs) | |
269 | { | |
270 | ListElement *entry = NULL; | |
668c0e44 | 271 | ListElement *next; |
6349c154 PKK |
272 | |
273 | if (fs == NULL) { | |
274 | return; | |
275 | } | |
276 | ||
668c0e44 | 277 | QLIST_FOREACH_SAFE(entry, &glfs_list, list, next) { |
6349c154 PKK |
278 | if (entry->saved.fs == fs) { |
279 | if (--entry->saved.ref) { | |
280 | return; | |
281 | } | |
282 | ||
283 | QLIST_REMOVE(entry, list); | |
284 | ||
285 | glfs_fini(entry->saved.fs); | |
286 | g_free(entry->saved.volume); | |
287 | g_free(entry); | |
288 | } | |
289 | } | |
290 | } | |
291 | ||
7edac2dd | 292 | static int parse_volume_options(BlockdevOptionsGluster *gconf, char *path) |
8d6d89cb BR |
293 | { |
294 | char *p, *q; | |
295 | ||
296 | if (!path) { | |
297 | return -EINVAL; | |
298 | } | |
299 | ||
300 | /* volume */ | |
301 | p = q = path + strspn(path, "/"); | |
302 | p += strcspn(p, "/"); | |
303 | if (*p == '\0') { | |
304 | return -EINVAL; | |
305 | } | |
d5cf4079 | 306 | gconf->volume = g_strndup(q, p - q); |
8d6d89cb | 307 | |
d5cf4079 | 308 | /* path */ |
8d6d89cb BR |
309 | p += strspn(p, "/"); |
310 | if (*p == '\0') { | |
311 | return -EINVAL; | |
312 | } | |
d5cf4079 | 313 | gconf->path = g_strdup(p); |
8d6d89cb BR |
314 | return 0; |
315 | } | |
316 | ||
317 | /* | |
d5cf4079 | 318 | * file=gluster[+transport]://[host[:port]]/volume/path[?socket=...] |
8d6d89cb BR |
319 | * |
320 | * 'gluster' is the protocol. | |
321 | * | |
322 | * 'transport' specifies the transport type used to connect to gluster | |
323 | * management daemon (glusterd). Valid transport types are | |
0552ff24 | 324 | * tcp or unix. If a transport type isn't specified, then tcp type is assumed. |
8d6d89cb | 325 | * |
d5cf4079 | 326 | * 'host' specifies the host where the volume file specification for |
0552ff24 | 327 | * the given volume resides. This can be either hostname or ipv4 address. |
d5cf4079 | 328 | * If transport type is 'unix', then 'host' field should not be specified. |
8d6d89cb BR |
329 | * The 'socket' field needs to be populated with the path to unix domain |
330 | * socket. | |
331 | * | |
332 | * 'port' is the port number on which glusterd is listening. This is optional | |
333 | * and if not specified, QEMU will send 0 which will make gluster to use the | |
334 | * default port. If the transport type is unix, then 'port' should not be | |
335 | * specified. | |
336 | * | |
d5cf4079 | 337 | * 'volume' is the name of the gluster volume which contains the VM image. |
8d6d89cb | 338 | * |
d5cf4079 | 339 | * 'path' is the path to the actual VM image that resides on gluster volume. |
8d6d89cb BR |
340 | * |
341 | * Examples: | |
342 | * | |
343 | * file=gluster://1.2.3.4/testvol/a.img | |
344 | * file=gluster+tcp://1.2.3.4/testvol/a.img | |
345 | * file=gluster+tcp://1.2.3.4:24007/testvol/dir/a.img | |
d5cf4079 | 346 | * file=gluster+tcp://host.domain.com:24007/testvol/dir/a.img |
8d6d89cb | 347 | * file=gluster+unix:///testvol/dir/a.img?socket=/tmp/glusterd.socket |
8d6d89cb | 348 | */ |
7edac2dd PKK |
349 | static int qemu_gluster_parse_uri(BlockdevOptionsGluster *gconf, |
350 | const char *filename) | |
8d6d89cb | 351 | { |
62cf396b | 352 | SocketAddress *gsconf; |
8d6d89cb BR |
353 | URI *uri; |
354 | QueryParams *qp = NULL; | |
355 | bool is_unix = false; | |
356 | int ret = 0; | |
357 | ||
358 | uri = uri_parse(filename); | |
359 | if (!uri) { | |
360 | return -EINVAL; | |
361 | } | |
362 | ||
54aa3de7 EB |
363 | gsconf = g_new0(SocketAddress, 1); |
364 | QAPI_LIST_PREPEND(gconf->server, gsconf); | |
7edac2dd | 365 | |
8d6d89cb | 366 | /* transport */ |
24897a76 | 367 | if (!uri->scheme || !strcmp(uri->scheme, "gluster")) { |
62cf396b | 368 | gsconf->type = SOCKET_ADDRESS_TYPE_INET; |
8d6d89cb | 369 | } else if (!strcmp(uri->scheme, "gluster+tcp")) { |
62cf396b | 370 | gsconf->type = SOCKET_ADDRESS_TYPE_INET; |
8d6d89cb | 371 | } else if (!strcmp(uri->scheme, "gluster+unix")) { |
62cf396b | 372 | gsconf->type = SOCKET_ADDRESS_TYPE_UNIX; |
8d6d89cb BR |
373 | is_unix = true; |
374 | } else if (!strcmp(uri->scheme, "gluster+rdma")) { | |
62cf396b | 375 | gsconf->type = SOCKET_ADDRESS_TYPE_INET; |
3dc6f869 | 376 | warn_report("rdma feature is not supported, falling back to tcp"); |
8d6d89cb BR |
377 | } else { |
378 | ret = -EINVAL; | |
379 | goto out; | |
380 | } | |
381 | ||
382 | ret = parse_volume_options(gconf, uri->path); | |
383 | if (ret < 0) { | |
384 | goto out; | |
385 | } | |
386 | ||
387 | qp = query_params_parse(uri->query); | |
388 | if (qp->n > 1 || (is_unix && !qp->n) || (!is_unix && qp->n)) { | |
389 | ret = -EINVAL; | |
390 | goto out; | |
391 | } | |
392 | ||
393 | if (is_unix) { | |
394 | if (uri->server || uri->port) { | |
395 | ret = -EINVAL; | |
396 | goto out; | |
397 | } | |
398 | if (strcmp(qp->p[0].name, "socket")) { | |
399 | ret = -EINVAL; | |
400 | goto out; | |
401 | } | |
7edac2dd | 402 | gsconf->u.q_unix.path = g_strdup(qp->p[0].value); |
8d6d89cb | 403 | } else { |
c5f1ae3a | 404 | gsconf->u.inet.host = g_strdup(uri->server ? uri->server : "localhost"); |
7edac2dd | 405 | if (uri->port) { |
c5f1ae3a | 406 | gsconf->u.inet.port = g_strdup_printf("%d", uri->port); |
7edac2dd | 407 | } else { |
c5f1ae3a | 408 | gsconf->u.inet.port = g_strdup_printf("%d", GLUSTER_DEFAULT_PORT); |
7edac2dd | 409 | } |
8d6d89cb BR |
410 | } |
411 | ||
412 | out: | |
413 | if (qp) { | |
414 | query_params_free(qp); | |
415 | } | |
416 | uri_free(uri); | |
417 | return ret; | |
418 | } | |
419 | ||
6c7189bb PKK |
420 | static struct glfs *qemu_gluster_glfs_init(BlockdevOptionsGluster *gconf, |
421 | Error **errp) | |
8d6d89cb | 422 | { |
6c7189bb | 423 | struct glfs *glfs; |
8d6d89cb BR |
424 | int ret; |
425 | int old_errno; | |
62cf396b | 426 | SocketAddressList *server; |
bd1386cc | 427 | uint64_t port; |
8d6d89cb | 428 | |
6349c154 PKK |
429 | glfs = glfs_find_preopened(gconf->volume); |
430 | if (glfs) { | |
431 | return glfs; | |
432 | } | |
433 | ||
d5cf4079 | 434 | glfs = glfs_new(gconf->volume); |
8d6d89cb BR |
435 | if (!glfs) { |
436 | goto out; | |
437 | } | |
438 | ||
6349c154 PKK |
439 | glfs_set_preopened(gconf->volume, glfs); |
440 | ||
6c7189bb | 441 | for (server = gconf->server; server; server = server->next) { |
fce5d538 | 442 | switch (server->value->type) { |
62cf396b | 443 | case SOCKET_ADDRESS_TYPE_UNIX: |
fc29458d | 444 | ret = glfs_set_volfile_server(glfs, "unix", |
6c7189bb | 445 | server->value->u.q_unix.path, 0); |
fce5d538 | 446 | break; |
62cf396b | 447 | case SOCKET_ADDRESS_TYPE_INET: |
bd1386cc | 448 | if (parse_uint_full(server->value->u.inet.port, 10, &port) < 0 || |
c56ac33b PKK |
449 | port > 65535) { |
450 | error_setg(errp, "'%s' is not a valid port number", | |
c5f1ae3a | 451 | server->value->u.inet.port); |
c56ac33b PKK |
452 | errno = EINVAL; |
453 | goto out; | |
454 | } | |
fc29458d | 455 | ret = glfs_set_volfile_server(glfs, "tcp", |
c5f1ae3a | 456 | server->value->u.inet.host, |
c56ac33b | 457 | (int)port); |
fce5d538 | 458 | break; |
62cf396b MA |
459 | case SOCKET_ADDRESS_TYPE_VSOCK: |
460 | case SOCKET_ADDRESS_TYPE_FD: | |
fce5d538 MA |
461 | default: |
462 | abort(); | |
6c7189bb PKK |
463 | } |
464 | ||
465 | if (ret < 0) { | |
466 | goto out; | |
467 | } | |
8d6d89cb BR |
468 | } |
469 | ||
1a417e46 | 470 | ret = glfs_set_logging(glfs, gconf->logfile, gconf->debug); |
8d6d89cb BR |
471 | if (ret < 0) { |
472 | goto out; | |
473 | } | |
474 | ||
475 | ret = glfs_init(glfs); | |
476 | if (ret) { | |
6c7189bb PKK |
477 | error_setg(errp, "Gluster connection for volume %s, path %s failed" |
478 | " to connect", gconf->volume, gconf->path); | |
479 | for (server = gconf->server; server; server = server->next) { | |
62cf396b | 480 | if (server->value->type == SOCKET_ADDRESS_TYPE_UNIX) { |
6c7189bb PKK |
481 | error_append_hint(errp, "hint: failed on socket %s ", |
482 | server->value->u.q_unix.path); | |
483 | } else { | |
484 | error_append_hint(errp, "hint: failed on host %s and port %s ", | |
c5f1ae3a MA |
485 | server->value->u.inet.host, |
486 | server->value->u.inet.port); | |
6c7189bb | 487 | } |
7edac2dd | 488 | } |
4557117d | 489 | |
6c7189bb PKK |
490 | error_append_hint(errp, "Please refer to gluster logs for more info\n"); |
491 | ||
4557117d | 492 | /* glfs_init sometimes doesn't set errno although docs suggest that */ |
7edac2dd | 493 | if (errno == 0) { |
4557117d | 494 | errno = EINVAL; |
7edac2dd | 495 | } |
4557117d | 496 | |
8d6d89cb BR |
497 | goto out; |
498 | } | |
499 | return glfs; | |
500 | ||
501 | out: | |
502 | if (glfs) { | |
503 | old_errno = errno; | |
6349c154 | 504 | glfs_clear_preopened(glfs); |
8d6d89cb BR |
505 | errno = old_errno; |
506 | } | |
507 | return NULL; | |
508 | } | |
509 | ||
6c7189bb PKK |
510 | /* |
511 | * Convert the json formatted command line into qapi. | |
512 | */ | |
513 | static int qemu_gluster_parse_json(BlockdevOptionsGluster *gconf, | |
514 | QDict *options, Error **errp) | |
515 | { | |
516 | QemuOpts *opts; | |
62cf396b | 517 | SocketAddress *gsconf = NULL; |
95b3a8c8 | 518 | SocketAddressList **tail; |
6c7189bb PKK |
519 | QDict *backing_options = NULL; |
520 | Error *local_err = NULL; | |
521 | char *str = NULL; | |
522 | const char *ptr; | |
56faeb9b | 523 | int i, type, num_servers; |
6c7189bb PKK |
524 | |
525 | /* create opts info from runtime_json_opts list */ | |
526 | opts = qemu_opts_create(&runtime_json_opts, NULL, 0, &error_abort); | |
a5f9b9df | 527 | if (!qemu_opts_absorb_qdict(opts, options, errp)) { |
6c7189bb PKK |
528 | goto out; |
529 | } | |
530 | ||
531 | num_servers = qdict_array_entries(options, GLUSTER_OPT_SERVER_PATTERN); | |
532 | if (num_servers < 1) { | |
533 | error_setg(&local_err, QERR_MISSING_PARAMETER, "server"); | |
534 | goto out; | |
535 | } | |
536 | ||
537 | ptr = qemu_opt_get(opts, GLUSTER_OPT_VOLUME); | |
538 | if (!ptr) { | |
539 | error_setg(&local_err, QERR_MISSING_PARAMETER, GLUSTER_OPT_VOLUME); | |
540 | goto out; | |
541 | } | |
542 | gconf->volume = g_strdup(ptr); | |
543 | ||
544 | ptr = qemu_opt_get(opts, GLUSTER_OPT_PATH); | |
545 | if (!ptr) { | |
546 | error_setg(&local_err, QERR_MISSING_PARAMETER, GLUSTER_OPT_PATH); | |
547 | goto out; | |
548 | } | |
549 | gconf->path = g_strdup(ptr); | |
550 | qemu_opts_del(opts); | |
95b3a8c8 | 551 | tail = &gconf->server; |
6c7189bb PKK |
552 | |
553 | for (i = 0; i < num_servers; i++) { | |
554 | str = g_strdup_printf(GLUSTER_OPT_SERVER_PATTERN"%d.", i); | |
555 | qdict_extract_subqdict(options, &backing_options, str); | |
556 | ||
557 | /* create opts info from runtime_type_opts list */ | |
558 | opts = qemu_opts_create(&runtime_type_opts, NULL, 0, &error_abort); | |
a5f9b9df | 559 | if (!qemu_opts_absorb_qdict(opts, backing_options, errp)) { |
6c7189bb PKK |
560 | goto out; |
561 | } | |
562 | ||
563 | ptr = qemu_opt_get(opts, GLUSTER_OPT_TYPE); | |
6c7189bb PKK |
564 | if (!ptr) { |
565 | error_setg(&local_err, QERR_MISSING_PARAMETER, GLUSTER_OPT_TYPE); | |
566 | error_append_hint(&local_err, GERR_INDEX_HINT, i); | |
567 | goto out; | |
568 | ||
569 | } | |
62cf396b | 570 | gsconf = g_new0(SocketAddress, 1); |
c5f1ae3a MA |
571 | if (!strcmp(ptr, "tcp")) { |
572 | ptr = "inet"; /* accept legacy "tcp" */ | |
573 | } | |
f7abe0ec | 574 | type = qapi_enum_parse(&SocketAddressType_lookup, ptr, -1, NULL); |
62cf396b MA |
575 | if (type != SOCKET_ADDRESS_TYPE_INET |
576 | && type != SOCKET_ADDRESS_TYPE_UNIX) { | |
fce5d538 MA |
577 | error_setg(&local_err, |
578 | "Parameter '%s' may be 'inet' or 'unix'", | |
579 | GLUSTER_OPT_TYPE); | |
6c7189bb PKK |
580 | error_append_hint(&local_err, GERR_INDEX_HINT, i); |
581 | goto out; | |
582 | } | |
fce5d538 | 583 | gsconf->type = type; |
6c7189bb PKK |
584 | qemu_opts_del(opts); |
585 | ||
62cf396b | 586 | if (gsconf->type == SOCKET_ADDRESS_TYPE_INET) { |
c5f1ae3a MA |
587 | /* create opts info from runtime_inet_opts list */ |
588 | opts = qemu_opts_create(&runtime_inet_opts, NULL, 0, &error_abort); | |
a5f9b9df | 589 | if (!qemu_opts_absorb_qdict(opts, backing_options, errp)) { |
6c7189bb PKK |
590 | goto out; |
591 | } | |
592 | ||
593 | ptr = qemu_opt_get(opts, GLUSTER_OPT_HOST); | |
594 | if (!ptr) { | |
595 | error_setg(&local_err, QERR_MISSING_PARAMETER, | |
596 | GLUSTER_OPT_HOST); | |
597 | error_append_hint(&local_err, GERR_INDEX_HINT, i); | |
598 | goto out; | |
599 | } | |
c5f1ae3a | 600 | gsconf->u.inet.host = g_strdup(ptr); |
6c7189bb PKK |
601 | ptr = qemu_opt_get(opts, GLUSTER_OPT_PORT); |
602 | if (!ptr) { | |
603 | error_setg(&local_err, QERR_MISSING_PARAMETER, | |
604 | GLUSTER_OPT_PORT); | |
605 | error_append_hint(&local_err, GERR_INDEX_HINT, i); | |
606 | goto out; | |
607 | } | |
c5f1ae3a | 608 | gsconf->u.inet.port = g_strdup(ptr); |
6c7189bb PKK |
609 | |
610 | /* defend for unsupported fields in InetSocketAddress, | |
611 | * i.e. @ipv4, @ipv6 and @to | |
612 | */ | |
613 | ptr = qemu_opt_get(opts, GLUSTER_OPT_TO); | |
614 | if (ptr) { | |
c5f1ae3a | 615 | gsconf->u.inet.has_to = true; |
6c7189bb PKK |
616 | } |
617 | ptr = qemu_opt_get(opts, GLUSTER_OPT_IPV4); | |
618 | if (ptr) { | |
c5f1ae3a | 619 | gsconf->u.inet.has_ipv4 = true; |
6c7189bb PKK |
620 | } |
621 | ptr = qemu_opt_get(opts, GLUSTER_OPT_IPV6); | |
622 | if (ptr) { | |
c5f1ae3a | 623 | gsconf->u.inet.has_ipv6 = true; |
6c7189bb | 624 | } |
c5f1ae3a | 625 | if (gsconf->u.inet.has_to) { |
6c7189bb PKK |
626 | error_setg(&local_err, "Parameter 'to' not supported"); |
627 | goto out; | |
628 | } | |
c5f1ae3a | 629 | if (gsconf->u.inet.has_ipv4 || gsconf->u.inet.has_ipv6) { |
6c7189bb PKK |
630 | error_setg(&local_err, "Parameters 'ipv4/ipv6' not supported"); |
631 | goto out; | |
632 | } | |
633 | qemu_opts_del(opts); | |
634 | } else { | |
635 | /* create opts info from runtime_unix_opts list */ | |
636 | opts = qemu_opts_create(&runtime_unix_opts, NULL, 0, &error_abort); | |
a5f9b9df | 637 | if (!qemu_opts_absorb_qdict(opts, backing_options, errp)) { |
6c7189bb PKK |
638 | goto out; |
639 | } | |
640 | ||
9dae635a KW |
641 | ptr = qemu_opt_get(opts, GLUSTER_OPT_PATH); |
642 | if (!ptr) { | |
643 | ptr = qemu_opt_get(opts, GLUSTER_OPT_SOCKET); | |
644 | } else if (qemu_opt_get(opts, GLUSTER_OPT_SOCKET)) { | |
645 | error_setg(&local_err, | |
646 | "Conflicting parameters 'path' and 'socket'"); | |
647 | error_append_hint(&local_err, GERR_INDEX_HINT, i); | |
648 | goto out; | |
649 | } | |
6c7189bb PKK |
650 | if (!ptr) { |
651 | error_setg(&local_err, QERR_MISSING_PARAMETER, | |
9dae635a | 652 | GLUSTER_OPT_PATH); |
6c7189bb PKK |
653 | error_append_hint(&local_err, GERR_INDEX_HINT, i); |
654 | goto out; | |
655 | } | |
656 | gsconf->u.q_unix.path = g_strdup(ptr); | |
657 | qemu_opts_del(opts); | |
658 | } | |
659 | ||
95b3a8c8 | 660 | QAPI_LIST_APPEND(tail, gsconf); |
85a82e85 | 661 | gsconf = NULL; |
6c7189bb | 662 | |
cb3e7f08 | 663 | qobject_unref(backing_options); |
85a82e85 | 664 | backing_options = NULL; |
6c7189bb PKK |
665 | g_free(str); |
666 | str = NULL; | |
667 | } | |
668 | ||
669 | return 0; | |
670 | ||
671 | out: | |
672 | error_propagate(errp, local_err); | |
62cf396b | 673 | qapi_free_SocketAddress(gsconf); |
6c7189bb | 674 | qemu_opts_del(opts); |
85a82e85 | 675 | g_free(str); |
cb3e7f08 | 676 | qobject_unref(backing_options); |
6c7189bb PKK |
677 | errno = EINVAL; |
678 | return -errno; | |
679 | } | |
680 | ||
ab8bda76 KW |
681 | /* Converts options given in @filename and the @options QDict into the QAPI |
682 | * object @gconf. */ | |
683 | static int qemu_gluster_parse(BlockdevOptionsGluster *gconf, | |
684 | const char *filename, | |
685 | QDict *options, Error **errp) | |
6c7189bb PKK |
686 | { |
687 | int ret; | |
688 | if (filename) { | |
689 | ret = qemu_gluster_parse_uri(gconf, filename); | |
690 | if (ret < 0) { | |
44acd46f | 691 | error_setg(errp, "invalid URI %s", filename); |
6c7189bb | 692 | error_append_hint(errp, "Usage: file=gluster[+transport]://" |
e9db8ff3 PKK |
693 | "[host[:port]]volume/path[?socket=...]" |
694 | "[,file.debug=N]" | |
695 | "[,file.logfile=/path/filename.log]\n"); | |
ab8bda76 | 696 | return ret; |
6c7189bb PKK |
697 | } |
698 | } else { | |
699 | ret = qemu_gluster_parse_json(gconf, options, errp); | |
700 | if (ret < 0) { | |
701 | error_append_hint(errp, "Usage: " | |
702 | "-drive driver=qcow2,file.driver=gluster," | |
703 | "file.volume=testvol,file.path=/path/a.qcow2" | |
e9db8ff3 PKK |
704 | "[,file.debug=9]" |
705 | "[,file.logfile=/path/filename.log]," | |
c5f1ae3a | 706 | "file.server.0.type=inet," |
6c7189bb PKK |
707 | "file.server.0.host=1.2.3.4," |
708 | "file.server.0.port=24007," | |
709 | "file.server.1.transport=unix," | |
9dae635a | 710 | "file.server.1.path=/var/run/glusterd.socket ..." |
6c7189bb | 711 | "\n"); |
ab8bda76 | 712 | return ret; |
6c7189bb | 713 | } |
ab8bda76 | 714 | } |
6c7189bb | 715 | |
ab8bda76 KW |
716 | return 0; |
717 | } | |
718 | ||
719 | static struct glfs *qemu_gluster_init(BlockdevOptionsGluster *gconf, | |
720 | const char *filename, | |
721 | QDict *options, Error **errp) | |
722 | { | |
723 | int ret; | |
724 | ||
725 | ret = qemu_gluster_parse(gconf, filename, options, errp); | |
726 | if (ret < 0) { | |
727 | errno = -ret; | |
728 | return NULL; | |
6c7189bb PKK |
729 | } |
730 | ||
731 | return qemu_gluster_glfs_init(gconf, errp); | |
732 | } | |
733 | ||
7c815372 BR |
734 | /* |
735 | * AIO callback routine called from GlusterFS thread. | |
736 | */ | |
0e3b891f NV |
737 | static void gluster_finish_aiocb(struct glfs_fd *fd, ssize_t ret, |
738 | #ifdef CONFIG_GLUSTERFS_IOCB_HAS_STAT | |
739 | struct glfs_stat *pre, struct glfs_stat *post, | |
740 | #endif | |
741 | void *arg) | |
7c815372 BR |
742 | { |
743 | GlusterAIOCB *acb = (GlusterAIOCB *)arg; | |
744 | ||
745 | if (!ret || ret == acb->size) { | |
746 | acb->ret = 0; /* Success */ | |
747 | } else if (ret < 0) { | |
a8827453 | 748 | acb->ret = -errno; /* Read/Write failed */ |
7c815372 BR |
749 | } else { |
750 | acb->ret = -EIO; /* Partial read/write - fail it */ | |
751 | } | |
752 | ||
1919631e | 753 | aio_co_schedule(acb->aio_context, acb->coroutine); |
7c815372 BR |
754 | } |
755 | ||
1b37b344 JC |
756 | static void qemu_gluster_parse_flags(int bdrv_flags, int *open_flags) |
757 | { | |
758 | assert(open_flags != NULL); | |
759 | ||
760 | *open_flags |= O_BINARY; | |
761 | ||
762 | if (bdrv_flags & BDRV_O_RDWR) { | |
763 | *open_flags |= O_RDWR; | |
764 | } else { | |
765 | *open_flags |= O_RDONLY; | |
766 | } | |
767 | ||
768 | if ((bdrv_flags & BDRV_O_NOCACHE)) { | |
769 | *open_flags |= O_DIRECT; | |
770 | } | |
771 | } | |
772 | ||
947eb203 NV |
773 | /* |
774 | * Do SEEK_DATA/HOLE to detect if it is functional. Older broken versions of | |
775 | * gfapi incorrectly return the current offset when SEEK_DATA/HOLE is used. | |
776 | * - Corrected versions return -1 and set errno to EINVAL. | |
777 | * - Versions that support SEEK_DATA/HOLE correctly, will return -1 and set | |
778 | * errno to ENXIO when SEEK_DATA is called with a position of EOF. | |
779 | */ | |
780 | static bool qemu_gluster_test_seek(struct glfs_fd *fd) | |
781 | { | |
d9b78974 JC |
782 | off_t ret = 0; |
783 | ||
784 | #if defined SEEK_HOLE && defined SEEK_DATA | |
785 | off_t eof; | |
947eb203 NV |
786 | |
787 | eof = glfs_lseek(fd, 0, SEEK_END); | |
788 | if (eof < 0) { | |
789 | /* this should never occur */ | |
790 | return false; | |
791 | } | |
792 | ||
793 | /* this should always fail with ENXIO if SEEK_DATA is supported */ | |
794 | ret = glfs_lseek(fd, eof, SEEK_DATA); | |
d9b78974 JC |
795 | #endif |
796 | ||
947eb203 NV |
797 | return (ret < 0) && (errno == ENXIO); |
798 | } | |
799 | ||
56d1b4d2 | 800 | static int qemu_gluster_open(BlockDriverState *bs, QDict *options, |
015a1036 | 801 | int bdrv_flags, Error **errp) |
8d6d89cb BR |
802 | { |
803 | BDRVGlusterState *s = bs->opaque; | |
1b37b344 | 804 | int open_flags = 0; |
8d6d89cb | 805 | int ret = 0; |
7edac2dd | 806 | BlockdevOptionsGluster *gconf = NULL; |
b4894776 | 807 | QemuOpts *opts; |
e9db8ff3 | 808 | const char *filename, *logfile; |
b4894776 | 809 | |
87ea75d5 | 810 | opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort); |
af175e85 | 811 | if (!qemu_opts_absorb_qdict(opts, options, errp)) { |
b4894776 KW |
812 | ret = -EINVAL; |
813 | goto out; | |
814 | } | |
815 | ||
7eac868a JC |
816 | filename = qemu_opt_get(opts, GLUSTER_OPT_FILENAME); |
817 | ||
1a417e46 PKK |
818 | s->debug = qemu_opt_get_number(opts, GLUSTER_OPT_DEBUG, |
819 | GLUSTER_DEBUG_DEFAULT); | |
820 | if (s->debug < 0) { | |
821 | s->debug = 0; | |
822 | } else if (s->debug > GLUSTER_DEBUG_MAX) { | |
823 | s->debug = GLUSTER_DEBUG_MAX; | |
7eac868a | 824 | } |
b4894776 | 825 | |
7edac2dd | 826 | gconf = g_new0(BlockdevOptionsGluster, 1); |
1a417e46 PKK |
827 | gconf->debug = s->debug; |
828 | gconf->has_debug = true; | |
e9db8ff3 PKK |
829 | |
830 | logfile = qemu_opt_get(opts, GLUSTER_OPT_LOGFILE); | |
831 | s->logfile = g_strdup(logfile ? logfile : GLUSTER_LOGFILE_DEFAULT); | |
832 | ||
833 | gconf->logfile = g_strdup(s->logfile); | |
e9db8ff3 | 834 | |
6c7189bb | 835 | s->glfs = qemu_gluster_init(gconf, filename, options, errp); |
8d6d89cb BR |
836 | if (!s->glfs) { |
837 | ret = -errno; | |
838 | goto out; | |
839 | } | |
840 | ||
d85fa9eb JC |
841 | #ifdef CONFIG_GLUSTERFS_XLATOR_OPT |
842 | /* Without this, if fsync fails for a recoverable reason (for instance, | |
843 | * ENOSPC), gluster will dump its cache, preventing retries. This means | |
844 | * almost certain data loss. Not all gluster versions support the | |
845 | * 'resync-failed-syncs-after-fsync' key value, but there is no way to | |
846 | * discover during runtime if it is supported (this api returns success for | |
847 | * unknown key/value pairs) */ | |
848 | ret = glfs_set_xlator_option(s->glfs, "*-write-behind", | |
849 | "resync-failed-syncs-after-fsync", | |
850 | "on"); | |
851 | if (ret < 0) { | |
852 | error_setg_errno(errp, errno, "Unable to set xlator key/value pair"); | |
853 | ret = -errno; | |
854 | goto out; | |
855 | } | |
856 | #endif | |
857 | ||
1b37b344 | 858 | qemu_gluster_parse_flags(bdrv_flags, &open_flags); |
8d6d89cb | 859 | |
d5cf4079 | 860 | s->fd = glfs_open(s->glfs, gconf->path, open_flags); |
54ea21bd KW |
861 | ret = s->fd ? 0 : -errno; |
862 | ||
863 | if (ret == -EACCES || ret == -EROFS) { | |
864 | /* Try to degrade to read-only, but if it doesn't work, still use the | |
865 | * normal error message. */ | |
018f9dea | 866 | bdrv_graph_rdlock_main_loop(); |
54ea21bd KW |
867 | if (bdrv_apply_auto_read_only(bs, NULL, NULL) == 0) { |
868 | open_flags = (open_flags & ~O_RDWR) | O_RDONLY; | |
869 | s->fd = glfs_open(s->glfs, gconf->path, open_flags); | |
870 | ret = s->fd ? 0 : -errno; | |
871 | } | |
018f9dea | 872 | bdrv_graph_rdunlock_main_loop(); |
8d6d89cb | 873 | } |
8d6d89cb | 874 | |
947eb203 NV |
875 | s->supports_seek_data = qemu_gluster_test_seek(s->fd); |
876 | ||
8d6d89cb | 877 | out: |
b4894776 | 878 | qemu_opts_del(opts); |
7edac2dd | 879 | qapi_free_BlockdevOptionsGluster(gconf); |
8d6d89cb BR |
880 | if (!ret) { |
881 | return ret; | |
882 | } | |
e9db8ff3 | 883 | g_free(s->logfile); |
8d6d89cb BR |
884 | if (s->fd) { |
885 | glfs_close(s->fd); | |
886 | } | |
6349c154 PKK |
887 | |
888 | glfs_clear_preopened(s->glfs); | |
889 | ||
8d6d89cb BR |
890 | return ret; |
891 | } | |
892 | ||
de23e72b SG |
893 | static void qemu_gluster_refresh_limits(BlockDriverState *bs, Error **errp) |
894 | { | |
895 | bs->bl.max_transfer = GLUSTER_MAX_TRANSFER; | |
9b38fc56 | 896 | bs->bl.max_pdiscard = MIN(SIZE_MAX, INT64_MAX); |
de23e72b SG |
897 | } |
898 | ||
adccfbcd JC |
899 | static int qemu_gluster_reopen_prepare(BDRVReopenState *state, |
900 | BlockReopenQueue *queue, Error **errp) | |
901 | { | |
902 | int ret = 0; | |
7eac868a | 903 | BDRVGlusterState *s; |
adccfbcd | 904 | BDRVGlusterReopenState *reop_s; |
7edac2dd | 905 | BlockdevOptionsGluster *gconf; |
adccfbcd JC |
906 | int open_flags = 0; |
907 | ||
908 | assert(state != NULL); | |
909 | assert(state->bs != NULL); | |
910 | ||
7eac868a JC |
911 | s = state->bs->opaque; |
912 | ||
5839e53b | 913 | state->opaque = g_new0(BDRVGlusterReopenState, 1); |
adccfbcd JC |
914 | reop_s = state->opaque; |
915 | ||
916 | qemu_gluster_parse_flags(state->flags, &open_flags); | |
917 | ||
7edac2dd | 918 | gconf = g_new0(BlockdevOptionsGluster, 1); |
1a417e46 PKK |
919 | gconf->debug = s->debug; |
920 | gconf->has_debug = true; | |
e9db8ff3 | 921 | gconf->logfile = g_strdup(s->logfile); |
0b1847bb SG |
922 | |
923 | /* | |
924 | * If 'state->bs->exact_filename' is empty, 'state->options' should contain | |
925 | * the JSON parameters already parsed. | |
926 | */ | |
927 | if (state->bs->exact_filename[0] != '\0') { | |
928 | reop_s->glfs = qemu_gluster_init(gconf, state->bs->exact_filename, NULL, | |
929 | errp); | |
930 | } else { | |
931 | reop_s->glfs = qemu_gluster_init(gconf, NULL, state->options, errp); | |
932 | } | |
adccfbcd JC |
933 | if (reop_s->glfs == NULL) { |
934 | ret = -errno; | |
935 | goto exit; | |
936 | } | |
937 | ||
d85fa9eb JC |
938 | #ifdef CONFIG_GLUSTERFS_XLATOR_OPT |
939 | ret = glfs_set_xlator_option(reop_s->glfs, "*-write-behind", | |
940 | "resync-failed-syncs-after-fsync", "on"); | |
941 | if (ret < 0) { | |
942 | error_setg_errno(errp, errno, "Unable to set xlator key/value pair"); | |
943 | ret = -errno; | |
944 | goto exit; | |
945 | } | |
946 | #endif | |
947 | ||
d5cf4079 | 948 | reop_s->fd = glfs_open(reop_s->glfs, gconf->path, open_flags); |
adccfbcd JC |
949 | if (reop_s->fd == NULL) { |
950 | /* reops->glfs will be cleaned up in _abort */ | |
951 | ret = -errno; | |
952 | goto exit; | |
953 | } | |
954 | ||
955 | exit: | |
956 | /* state->opaque will be freed in either the _abort or _commit */ | |
7edac2dd | 957 | qapi_free_BlockdevOptionsGluster(gconf); |
adccfbcd JC |
958 | return ret; |
959 | } | |
960 | ||
961 | static void qemu_gluster_reopen_commit(BDRVReopenState *state) | |
962 | { | |
963 | BDRVGlusterReopenState *reop_s = state->opaque; | |
964 | BDRVGlusterState *s = state->bs->opaque; | |
965 | ||
966 | ||
967 | /* close the old */ | |
968 | if (s->fd) { | |
969 | glfs_close(s->fd); | |
970 | } | |
6349c154 PKK |
971 | |
972 | glfs_clear_preopened(s->glfs); | |
adccfbcd JC |
973 | |
974 | /* use the newly opened image / connection */ | |
975 | s->fd = reop_s->fd; | |
976 | s->glfs = reop_s->glfs; | |
977 | ||
978 | g_free(state->opaque); | |
979 | state->opaque = NULL; | |
980 | ||
981 | return; | |
982 | } | |
983 | ||
984 | ||
985 | static void qemu_gluster_reopen_abort(BDRVReopenState *state) | |
986 | { | |
987 | BDRVGlusterReopenState *reop_s = state->opaque; | |
988 | ||
989 | if (reop_s == NULL) { | |
990 | return; | |
991 | } | |
992 | ||
993 | if (reop_s->fd) { | |
994 | glfs_close(reop_s->fd); | |
995 | } | |
996 | ||
6349c154 | 997 | glfs_clear_preopened(reop_s->glfs); |
adccfbcd JC |
998 | |
999 | g_free(state->opaque); | |
1000 | state->opaque = NULL; | |
1001 | ||
1002 | return; | |
1003 | } | |
1004 | ||
7c815372 | 1005 | #ifdef CONFIG_GLUSTERFS_ZEROFILL |
e88a36eb | 1006 | static coroutine_fn int qemu_gluster_co_pwrite_zeroes(BlockDriverState *bs, |
f70c50c8 | 1007 | int64_t offset, |
f34b2bcf | 1008 | int64_t bytes, |
f70c50c8 | 1009 | BdrvRequestFlags flags) |
7c815372 BR |
1010 | { |
1011 | int ret; | |
c833d1e8 | 1012 | GlusterAIOCB acb; |
7c815372 | 1013 | BDRVGlusterState *s = bs->opaque; |
7c815372 | 1014 | |
f34b2bcf | 1015 | acb.size = bytes; |
c833d1e8 PB |
1016 | acb.ret = 0; |
1017 | acb.coroutine = qemu_coroutine_self(); | |
1018 | acb.aio_context = bdrv_get_aio_context(bs); | |
7c815372 | 1019 | |
f34b2bcf | 1020 | ret = glfs_zerofill_async(s->fd, offset, bytes, gluster_finish_aiocb, &acb); |
7c815372 | 1021 | if (ret < 0) { |
c833d1e8 | 1022 | return -errno; |
7c815372 BR |
1023 | } |
1024 | ||
1025 | qemu_coroutine_yield(); | |
c833d1e8 | 1026 | return acb.ret; |
7c815372 BR |
1027 | } |
1028 | #endif | |
1029 | ||
36e87909 HR |
1030 | static int qemu_gluster_do_truncate(struct glfs_fd *fd, int64_t offset, |
1031 | PreallocMode prealloc, Error **errp) | |
1032 | { | |
f3a33f79 HR |
1033 | int64_t current_length; |
1034 | ||
1035 | current_length = glfs_lseek(fd, 0, SEEK_END); | |
1036 | if (current_length < 0) { | |
1037 | error_setg_errno(errp, errno, "Failed to determine current size"); | |
1038 | return -errno; | |
1039 | } | |
1040 | ||
1041 | if (current_length > offset && prealloc != PREALLOC_MODE_OFF) { | |
1042 | error_setg(errp, "Cannot use preallocation for shrinking files"); | |
1043 | return -ENOTSUP; | |
1044 | } | |
1045 | ||
1046 | if (current_length == offset) { | |
1047 | return 0; | |
1048 | } | |
1049 | ||
36e87909 HR |
1050 | switch (prealloc) { |
1051 | #ifdef CONFIG_GLUSTERFS_FALLOCATE | |
1052 | case PREALLOC_MODE_FALLOC: | |
f3a33f79 | 1053 | if (glfs_fallocate(fd, 0, current_length, offset - current_length)) { |
36e87909 HR |
1054 | error_setg_errno(errp, errno, "Could not preallocate data"); |
1055 | return -errno; | |
1056 | } | |
1057 | break; | |
1058 | #endif /* CONFIG_GLUSTERFS_FALLOCATE */ | |
1059 | #ifdef CONFIG_GLUSTERFS_ZEROFILL | |
1060 | case PREALLOC_MODE_FULL: | |
1061 | if (glfs_ftruncate(fd, offset)) { | |
1062 | error_setg_errno(errp, errno, "Could not resize file"); | |
1063 | return -errno; | |
1064 | } | |
f3a33f79 | 1065 | if (glfs_zerofill(fd, current_length, offset - current_length)) { |
36e87909 HR |
1066 | error_setg_errno(errp, errno, "Could not zerofill the new area"); |
1067 | return -errno; | |
1068 | } | |
1069 | break; | |
1070 | #endif /* CONFIG_GLUSTERFS_ZEROFILL */ | |
1071 | case PREALLOC_MODE_OFF: | |
1072 | if (glfs_ftruncate(fd, offset)) { | |
1073 | error_setg_errno(errp, errno, "Could not resize file"); | |
1074 | return -errno; | |
1075 | } | |
1076 | break; | |
1077 | default: | |
1078 | error_setg(errp, "Unsupported preallocation mode: %s", | |
1079 | PreallocMode_str(prealloc)); | |
1080 | return -EINVAL; | |
1081 | } | |
1082 | ||
1083 | return 0; | |
1084 | } | |
1085 | ||
ab8bda76 KW |
1086 | static int qemu_gluster_co_create(BlockdevCreateOptions *options, |
1087 | Error **errp) | |
1088 | { | |
1089 | BlockdevCreateOptionsGluster *opts = &options->u.gluster; | |
1090 | struct glfs *glfs; | |
1091 | struct glfs_fd *fd = NULL; | |
1092 | int ret = 0; | |
1093 | ||
1094 | assert(options->driver == BLOCKDEV_DRIVER_GLUSTER); | |
1095 | ||
1096 | glfs = qemu_gluster_glfs_init(opts->location, errp); | |
1097 | if (!glfs) { | |
1098 | ret = -errno; | |
1099 | goto out; | |
1100 | } | |
1101 | ||
1102 | fd = glfs_creat(glfs, opts->location->path, | |
1103 | O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, S_IRUSR | S_IWUSR); | |
1104 | if (!fd) { | |
1105 | ret = -errno; | |
1106 | goto out; | |
1107 | } | |
1108 | ||
1109 | ret = qemu_gluster_do_truncate(fd, opts->size, opts->preallocation, errp); | |
1110 | ||
1111 | out: | |
1112 | if (fd) { | |
1113 | if (glfs_close(fd) != 0 && ret == 0) { | |
1114 | ret = -errno; | |
1115 | } | |
1116 | } | |
1117 | glfs_clear_preopened(glfs); | |
1118 | return ret; | |
1119 | } | |
1120 | ||
b92902df ML |
1121 | static int coroutine_fn qemu_gluster_co_create_opts(BlockDriver *drv, |
1122 | const char *filename, | |
efc75e2a SH |
1123 | QemuOpts *opts, |
1124 | Error **errp) | |
8d6d89cb | 1125 | { |
ab8bda76 KW |
1126 | BlockdevCreateOptions *options; |
1127 | BlockdevCreateOptionsGluster *gopts; | |
7edac2dd | 1128 | BlockdevOptionsGluster *gconf; |
90c772de | 1129 | char *tmp = NULL; |
df3a429a | 1130 | Error *local_err = NULL; |
ab8bda76 KW |
1131 | int ret; |
1132 | ||
1133 | options = g_new0(BlockdevCreateOptions, 1); | |
1134 | options->driver = BLOCKDEV_DRIVER_GLUSTER; | |
1135 | gopts = &options->u.gluster; | |
8d6d89cb | 1136 | |
7edac2dd | 1137 | gconf = g_new0(BlockdevOptionsGluster, 1); |
ab8bda76 KW |
1138 | gopts->location = gconf; |
1139 | ||
1140 | gopts->size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), | |
1141 | BDRV_SECTOR_SIZE); | |
1142 | ||
1143 | tmp = qemu_opt_get_del(opts, BLOCK_OPT_PREALLOC); | |
1144 | gopts->preallocation = qapi_enum_parse(&PreallocMode_lookup, tmp, | |
1145 | PREALLOC_MODE_OFF, &local_err); | |
1146 | g_free(tmp); | |
1147 | if (local_err) { | |
1148 | error_propagate(errp, local_err); | |
1149 | ret = -EINVAL; | |
1150 | goto fail; | |
1151 | } | |
1152 | ||
1a417e46 PKK |
1153 | gconf->debug = qemu_opt_get_number_del(opts, GLUSTER_OPT_DEBUG, |
1154 | GLUSTER_DEBUG_DEFAULT); | |
1155 | if (gconf->debug < 0) { | |
1156 | gconf->debug = 0; | |
1157 | } else if (gconf->debug > GLUSTER_DEBUG_MAX) { | |
1158 | gconf->debug = GLUSTER_DEBUG_MAX; | |
1159 | } | |
1160 | gconf->has_debug = true; | |
7eac868a | 1161 | |
e9db8ff3 PKK |
1162 | gconf->logfile = qemu_opt_get_del(opts, GLUSTER_OPT_LOGFILE); |
1163 | if (!gconf->logfile) { | |
1164 | gconf->logfile = g_strdup(GLUSTER_LOGFILE_DEFAULT); | |
1165 | } | |
e9db8ff3 | 1166 | |
ab8bda76 KW |
1167 | ret = qemu_gluster_parse(gconf, filename, NULL, errp); |
1168 | if (ret < 0) { | |
1169 | goto fail; | |
8d6d89cb BR |
1170 | } |
1171 | ||
ab8bda76 KW |
1172 | ret = qemu_gluster_co_create(options, errp); |
1173 | if (ret < 0) { | |
1174 | goto fail; | |
df3a429a NV |
1175 | } |
1176 | ||
ab8bda76 KW |
1177 | ret = 0; |
1178 | fail: | |
1179 | qapi_free_BlockdevCreateOptions(options); | |
8d6d89cb BR |
1180 | return ret; |
1181 | } | |
1182 | ||
15744b0b | 1183 | static coroutine_fn int qemu_gluster_co_rw(BlockDriverState *bs, |
f70c50c8 PKK |
1184 | int64_t sector_num, int nb_sectors, |
1185 | QEMUIOVector *qiov, int write) | |
8d6d89cb BR |
1186 | { |
1187 | int ret; | |
c833d1e8 | 1188 | GlusterAIOCB acb; |
8d6d89cb | 1189 | BDRVGlusterState *s = bs->opaque; |
15744b0b BR |
1190 | size_t size = nb_sectors * BDRV_SECTOR_SIZE; |
1191 | off_t offset = sector_num * BDRV_SECTOR_SIZE; | |
8d6d89cb | 1192 | |
c833d1e8 PB |
1193 | acb.size = size; |
1194 | acb.ret = 0; | |
1195 | acb.coroutine = qemu_coroutine_self(); | |
1196 | acb.aio_context = bdrv_get_aio_context(bs); | |
8d6d89cb BR |
1197 | |
1198 | if (write) { | |
1199 | ret = glfs_pwritev_async(s->fd, qiov->iov, qiov->niov, offset, 0, | |
f70c50c8 | 1200 | gluster_finish_aiocb, &acb); |
8d6d89cb BR |
1201 | } else { |
1202 | ret = glfs_preadv_async(s->fd, qiov->iov, qiov->niov, offset, 0, | |
f70c50c8 | 1203 | gluster_finish_aiocb, &acb); |
8d6d89cb BR |
1204 | } |
1205 | ||
1206 | if (ret < 0) { | |
c833d1e8 | 1207 | return -errno; |
8d6d89cb | 1208 | } |
15744b0b BR |
1209 | |
1210 | qemu_coroutine_yield(); | |
c833d1e8 | 1211 | return acb.ret; |
8d6d89cb BR |
1212 | } |
1213 | ||
061ca8a3 KW |
1214 | static coroutine_fn int qemu_gluster_co_truncate(BlockDriverState *bs, |
1215 | int64_t offset, | |
c80d8b06 | 1216 | bool exact, |
061ca8a3 | 1217 | PreallocMode prealloc, |
92b92799 | 1218 | BdrvRequestFlags flags, |
061ca8a3 | 1219 | Error **errp) |
42ec24e2 | 1220 | { |
42ec24e2 | 1221 | BDRVGlusterState *s = bs->opaque; |
c3132aff | 1222 | return qemu_gluster_do_truncate(s->fd, offset, prealloc, errp); |
42ec24e2 PB |
1223 | } |
1224 | ||
15744b0b | 1225 | static coroutine_fn int qemu_gluster_co_readv(BlockDriverState *bs, |
f70c50c8 PKK |
1226 | int64_t sector_num, |
1227 | int nb_sectors, | |
1228 | QEMUIOVector *qiov) | |
8d6d89cb | 1229 | { |
15744b0b | 1230 | return qemu_gluster_co_rw(bs, sector_num, nb_sectors, qiov, 0); |
8d6d89cb BR |
1231 | } |
1232 | ||
15744b0b | 1233 | static coroutine_fn int qemu_gluster_co_writev(BlockDriverState *bs, |
f70c50c8 PKK |
1234 | int64_t sector_num, |
1235 | int nb_sectors, | |
e18a58b4 EB |
1236 | QEMUIOVector *qiov, |
1237 | int flags) | |
8d6d89cb | 1238 | { |
15744b0b | 1239 | return qemu_gluster_co_rw(bs, sector_num, nb_sectors, qiov, 1); |
8d6d89cb BR |
1240 | } |
1241 | ||
5d4343e6 JC |
1242 | static void qemu_gluster_close(BlockDriverState *bs) |
1243 | { | |
1244 | BDRVGlusterState *s = bs->opaque; | |
1245 | ||
e9db8ff3 | 1246 | g_free(s->logfile); |
5d4343e6 JC |
1247 | if (s->fd) { |
1248 | glfs_close(s->fd); | |
1249 | s->fd = NULL; | |
1250 | } | |
6349c154 | 1251 | glfs_clear_preopened(s->glfs); |
5d4343e6 JC |
1252 | } |
1253 | ||
15744b0b | 1254 | static coroutine_fn int qemu_gluster_co_flush_to_disk(BlockDriverState *bs) |
8d6d89cb BR |
1255 | { |
1256 | int ret; | |
c833d1e8 | 1257 | GlusterAIOCB acb; |
8d6d89cb BR |
1258 | BDRVGlusterState *s = bs->opaque; |
1259 | ||
c833d1e8 PB |
1260 | acb.size = 0; |
1261 | acb.ret = 0; | |
1262 | acb.coroutine = qemu_coroutine_self(); | |
1263 | acb.aio_context = bdrv_get_aio_context(bs); | |
8d6d89cb | 1264 | |
c833d1e8 | 1265 | ret = glfs_fsync_async(s->fd, gluster_finish_aiocb, &acb); |
8d6d89cb | 1266 | if (ret < 0) { |
d85fa9eb JC |
1267 | ret = -errno; |
1268 | goto error; | |
8d6d89cb | 1269 | } |
15744b0b BR |
1270 | |
1271 | qemu_coroutine_yield(); | |
d85fa9eb JC |
1272 | if (acb.ret < 0) { |
1273 | ret = acb.ret; | |
1274 | goto error; | |
1275 | } | |
1276 | ||
c833d1e8 | 1277 | return acb.ret; |
d85fa9eb JC |
1278 | |
1279 | error: | |
1280 | /* Some versions of Gluster (3.5.6 -> 3.5.8?) will not retain its cache | |
1281 | * after a fsync failure, so we have no way of allowing the guest to safely | |
1282 | * continue. Gluster versions prior to 3.5.6 don't retain the cache | |
1283 | * either, but will invalidate the fd on error, so this is again our only | |
1284 | * option. | |
1285 | * | |
1286 | * The 'resync-failed-syncs-after-fsync' xlator option for the | |
1287 | * write-behind cache will cause later gluster versions to retain its | |
1288 | * cache after error, so long as the fd remains open. However, we | |
1289 | * currently have no way of knowing if this option is supported. | |
1290 | * | |
1291 | * TODO: Once gluster provides a way for us to determine if the option | |
1292 | * is supported, bypass the closure and setting drv to NULL. */ | |
1293 | qemu_gluster_close(bs); | |
1294 | bs->drv = NULL; | |
1295 | return ret; | |
8d6d89cb BR |
1296 | } |
1297 | ||
0c14fb47 | 1298 | #ifdef CONFIG_GLUSTERFS_DISCARD |
1014170b | 1299 | static coroutine_fn int qemu_gluster_co_pdiscard(BlockDriverState *bs, |
0c802287 | 1300 | int64_t offset, int64_t bytes) |
0c14fb47 BR |
1301 | { |
1302 | int ret; | |
c833d1e8 | 1303 | GlusterAIOCB acb; |
0c14fb47 | 1304 | BDRVGlusterState *s = bs->opaque; |
0c14fb47 | 1305 | |
0c802287 VSO |
1306 | assert(bytes <= SIZE_MAX); /* rely on max_pdiscard */ |
1307 | ||
c833d1e8 PB |
1308 | acb.size = 0; |
1309 | acb.ret = 0; | |
1310 | acb.coroutine = qemu_coroutine_self(); | |
1311 | acb.aio_context = bdrv_get_aio_context(bs); | |
0c14fb47 | 1312 | |
0c802287 | 1313 | ret = glfs_discard_async(s->fd, offset, bytes, gluster_finish_aiocb, &acb); |
0c14fb47 | 1314 | if (ret < 0) { |
c833d1e8 | 1315 | return -errno; |
0c14fb47 | 1316 | } |
15744b0b BR |
1317 | |
1318 | qemu_coroutine_yield(); | |
c833d1e8 | 1319 | return acb.ret; |
0c14fb47 BR |
1320 | } |
1321 | #endif | |
1322 | ||
c86422c5 | 1323 | static int64_t coroutine_fn qemu_gluster_co_getlength(BlockDriverState *bs) |
8d6d89cb BR |
1324 | { |
1325 | BDRVGlusterState *s = bs->opaque; | |
1326 | int64_t ret; | |
1327 | ||
1328 | ret = glfs_lseek(s->fd, 0, SEEK_END); | |
1329 | if (ret < 0) { | |
1330 | return -errno; | |
1331 | } else { | |
1332 | return ret; | |
1333 | } | |
1334 | } | |
1335 | ||
82618d7b EGE |
1336 | static int64_t coroutine_fn |
1337 | qemu_gluster_co_get_allocated_file_size(BlockDriverState *bs) | |
8d6d89cb BR |
1338 | { |
1339 | BDRVGlusterState *s = bs->opaque; | |
1340 | struct stat st; | |
1341 | int ret; | |
1342 | ||
1343 | ret = glfs_fstat(s->fd, &st); | |
1344 | if (ret < 0) { | |
1345 | return -errno; | |
1346 | } else { | |
1347 | return st.st_blocks * 512; | |
1348 | } | |
1349 | } | |
1350 | ||
947eb203 NV |
1351 | /* |
1352 | * Find allocation range in @bs around offset @start. | |
1353 | * May change underlying file descriptor's file offset. | |
1354 | * If @start is not in a hole, store @start in @data, and the | |
1355 | * beginning of the next hole in @hole, and return 0. | |
1356 | * If @start is in a non-trailing hole, store @start in @hole and the | |
1357 | * beginning of the next non-hole in @data, and return 0. | |
1358 | * If @start is in a trailing hole or beyond EOF, return -ENXIO. | |
1359 | * If we can't find out, return a negative errno other than -ENXIO. | |
1360 | * | |
50d6a8a3 | 1361 | * (Shamefully copied from file-posix.c, only minuscule adaptions.) |
947eb203 NV |
1362 | */ |
1363 | static int find_allocation(BlockDriverState *bs, off_t start, | |
1364 | off_t *data, off_t *hole) | |
1365 | { | |
1366 | BDRVGlusterState *s = bs->opaque; | |
947eb203 NV |
1367 | |
1368 | if (!s->supports_seek_data) { | |
d9b78974 | 1369 | goto exit; |
947eb203 NV |
1370 | } |
1371 | ||
d9b78974 JC |
1372 | #if defined SEEK_HOLE && defined SEEK_DATA |
1373 | off_t offs; | |
1374 | ||
947eb203 NV |
1375 | /* |
1376 | * SEEK_DATA cases: | |
1377 | * D1. offs == start: start is in data | |
1378 | * D2. offs > start: start is in a hole, next data at offs | |
1379 | * D3. offs < 0, errno = ENXIO: either start is in a trailing hole | |
1380 | * or start is beyond EOF | |
1381 | * If the latter happens, the file has been truncated behind | |
1382 | * our back since we opened it. All bets are off then. | |
1383 | * Treating like a trailing hole is simplest. | |
1384 | * D4. offs < 0, errno != ENXIO: we learned nothing | |
1385 | */ | |
1386 | offs = glfs_lseek(s->fd, start, SEEK_DATA); | |
1387 | if (offs < 0) { | |
1388 | return -errno; /* D3 or D4 */ | |
1389 | } | |
223a23c1 JC |
1390 | |
1391 | if (offs < start) { | |
1392 | /* This is not a valid return by lseek(). We are safe to just return | |
1393 | * -EIO in this case, and we'll treat it like D4. Unfortunately some | |
1394 | * versions of gluster server will return offs < start, so an assert | |
1395 | * here will unnecessarily abort QEMU. */ | |
1396 | return -EIO; | |
1397 | } | |
947eb203 NV |
1398 | |
1399 | if (offs > start) { | |
1400 | /* D2: in hole, next data at offs */ | |
1401 | *hole = start; | |
1402 | *data = offs; | |
1403 | return 0; | |
1404 | } | |
1405 | ||
1406 | /* D1: in data, end not yet known */ | |
1407 | ||
1408 | /* | |
1409 | * SEEK_HOLE cases: | |
1410 | * H1. offs == start: start is in a hole | |
1411 | * If this happens here, a hole has been dug behind our back | |
1412 | * since the previous lseek(). | |
1413 | * H2. offs > start: either start is in data, next hole at offs, | |
1414 | * or start is in trailing hole, EOF at offs | |
1415 | * Linux treats trailing holes like any other hole: offs == | |
1416 | * start. Solaris seeks to EOF instead: offs > start (blech). | |
1417 | * If that happens here, a hole has been dug behind our back | |
1418 | * since the previous lseek(). | |
1419 | * H3. offs < 0, errno = ENXIO: start is beyond EOF | |
1420 | * If this happens, the file has been truncated behind our | |
1421 | * back since we opened it. Treat it like a trailing hole. | |
1422 | * H4. offs < 0, errno != ENXIO: we learned nothing | |
1423 | * Pretend we know nothing at all, i.e. "forget" about D1. | |
1424 | */ | |
1425 | offs = glfs_lseek(s->fd, start, SEEK_HOLE); | |
1426 | if (offs < 0) { | |
1427 | return -errno; /* D1 and (H3 or H4) */ | |
1428 | } | |
223a23c1 JC |
1429 | |
1430 | if (offs < start) { | |
1431 | /* This is not a valid return by lseek(). We are safe to just return | |
1432 | * -EIO in this case, and we'll treat it like H4. Unfortunately some | |
1433 | * versions of gluster server will return offs < start, so an assert | |
1434 | * here will unnecessarily abort QEMU. */ | |
1435 | return -EIO; | |
1436 | } | |
947eb203 NV |
1437 | |
1438 | if (offs > start) { | |
1439 | /* | |
1440 | * D1 and H2: either in data, next hole at offs, or it was in | |
1441 | * data but is now in a trailing hole. In the latter case, | |
1442 | * all bets are off. Treating it as if it there was data all | |
1443 | * the way to EOF is safe, so simply do that. | |
1444 | */ | |
1445 | *data = start; | |
1446 | *hole = offs; | |
1447 | return 0; | |
1448 | } | |
1449 | ||
1450 | /* D1 and H1 */ | |
1451 | return -EBUSY; | |
d9b78974 JC |
1452 | #endif |
1453 | ||
1454 | exit: | |
1455 | return -ENOTSUP; | |
947eb203 NV |
1456 | } |
1457 | ||
1458 | /* | |
08c9e773 | 1459 | * Returns the allocation status of the specified offset. |
947eb203 | 1460 | * |
08c9e773 | 1461 | * The block layer guarantees 'offset' and 'bytes' are within bounds. |
947eb203 | 1462 | * |
08c9e773 EB |
1463 | * 'pnum' is set to the number of bytes (including and immediately following |
1464 | * the specified offset) that are known to be in the same | |
947eb203 NV |
1465 | * allocated/unallocated state. |
1466 | * | |
72b4cabe HR |
1467 | * 'bytes' is a soft cap for 'pnum'. If the information is free, 'pnum' may |
1468 | * well exceed it. | |
947eb203 | 1469 | * |
08c9e773 | 1470 | * (Based on raw_co_block_status() from file-posix.c.) |
947eb203 | 1471 | */ |
08c9e773 EB |
1472 | static int coroutine_fn qemu_gluster_co_block_status(BlockDriverState *bs, |
1473 | bool want_zero, | |
1474 | int64_t offset, | |
1475 | int64_t bytes, | |
1476 | int64_t *pnum, | |
1477 | int64_t *map, | |
1478 | BlockDriverState **file) | |
947eb203 NV |
1479 | { |
1480 | BDRVGlusterState *s = bs->opaque; | |
08c9e773 | 1481 | off_t data = 0, hole = 0; |
947eb203 NV |
1482 | int ret = -EINVAL; |
1483 | ||
e24154d8 HR |
1484 | assert(QEMU_IS_ALIGNED(offset | bytes, bs->bl.request_alignment)); |
1485 | ||
947eb203 NV |
1486 | if (!s->fd) { |
1487 | return ret; | |
1488 | } | |
1489 | ||
08c9e773 EB |
1490 | if (!want_zero) { |
1491 | *pnum = bytes; | |
1492 | *map = offset; | |
1493 | *file = bs; | |
1494 | return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID; | |
947eb203 NV |
1495 | } |
1496 | ||
08c9e773 | 1497 | ret = find_allocation(bs, offset, &data, &hole); |
947eb203 NV |
1498 | if (ret == -ENXIO) { |
1499 | /* Trailing hole */ | |
08c9e773 | 1500 | *pnum = bytes; |
947eb203 NV |
1501 | ret = BDRV_BLOCK_ZERO; |
1502 | } else if (ret < 0) { | |
1503 | /* No info available, so pretend there are no holes */ | |
08c9e773 | 1504 | *pnum = bytes; |
947eb203 | 1505 | ret = BDRV_BLOCK_DATA; |
08c9e773 EB |
1506 | } else if (data == offset) { |
1507 | /* On a data extent, compute bytes to the end of the extent, | |
947eb203 | 1508 | * possibly including a partial sector at EOF. */ |
72b4cabe | 1509 | *pnum = hole - offset; |
e24154d8 HR |
1510 | |
1511 | /* | |
1512 | * We are not allowed to return partial sectors, though, so | |
1513 | * round up if necessary. | |
1514 | */ | |
1515 | if (!QEMU_IS_ALIGNED(*pnum, bs->bl.request_alignment)) { | |
c86422c5 | 1516 | int64_t file_length = qemu_gluster_co_getlength(bs); |
e24154d8 HR |
1517 | if (file_length > 0) { |
1518 | /* Ignore errors, this is just a safeguard */ | |
1519 | assert(hole == file_length); | |
1520 | } | |
1521 | *pnum = ROUND_UP(*pnum, bs->bl.request_alignment); | |
1522 | } | |
1523 | ||
947eb203 NV |
1524 | ret = BDRV_BLOCK_DATA; |
1525 | } else { | |
08c9e773 EB |
1526 | /* On a hole, compute bytes to the beginning of the next extent. */ |
1527 | assert(hole == offset); | |
72b4cabe | 1528 | *pnum = data - offset; |
947eb203 NV |
1529 | ret = BDRV_BLOCK_ZERO; |
1530 | } | |
1531 | ||
08c9e773 | 1532 | *map = offset; |
947eb203 NV |
1533 | *file = bs; |
1534 | ||
08c9e773 | 1535 | return ret | BDRV_BLOCK_OFFSET_VALID; |
947eb203 NV |
1536 | } |
1537 | ||
1538 | ||
2654267c HR |
1539 | static const char *const gluster_strong_open_opts[] = { |
1540 | GLUSTER_OPT_VOLUME, | |
1541 | GLUSTER_OPT_PATH, | |
1542 | GLUSTER_OPT_TYPE, | |
1543 | GLUSTER_OPT_SERVER_PATTERN, | |
1544 | GLUSTER_OPT_HOST, | |
1545 | GLUSTER_OPT_PORT, | |
1546 | GLUSTER_OPT_TO, | |
1547 | GLUSTER_OPT_IPV4, | |
1548 | GLUSTER_OPT_IPV6, | |
1549 | GLUSTER_OPT_SOCKET, | |
1550 | ||
1551 | NULL | |
1552 | }; | |
1553 | ||
8d6d89cb BR |
1554 | static BlockDriver bdrv_gluster = { |
1555 | .format_name = "gluster", | |
1556 | .protocol_name = "gluster", | |
1557 | .instance_size = sizeof(BDRVGlusterState), | |
1558 | .bdrv_file_open = qemu_gluster_open, | |
adccfbcd JC |
1559 | .bdrv_reopen_prepare = qemu_gluster_reopen_prepare, |
1560 | .bdrv_reopen_commit = qemu_gluster_reopen_commit, | |
1561 | .bdrv_reopen_abort = qemu_gluster_reopen_abort, | |
8d6d89cb | 1562 | .bdrv_close = qemu_gluster_close, |
ab8bda76 | 1563 | .bdrv_co_create = qemu_gluster_co_create, |
efc75e2a | 1564 | .bdrv_co_create_opts = qemu_gluster_co_create_opts, |
c86422c5 | 1565 | .bdrv_co_getlength = qemu_gluster_co_getlength, |
82618d7b | 1566 | .bdrv_co_get_allocated_file_size = qemu_gluster_co_get_allocated_file_size, |
061ca8a3 | 1567 | .bdrv_co_truncate = qemu_gluster_co_truncate, |
15744b0b BR |
1568 | .bdrv_co_readv = qemu_gluster_co_readv, |
1569 | .bdrv_co_writev = qemu_gluster_co_writev, | |
1570 | .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk, | |
0c14fb47 | 1571 | #ifdef CONFIG_GLUSTERFS_DISCARD |
1014170b | 1572 | .bdrv_co_pdiscard = qemu_gluster_co_pdiscard, |
7c815372 BR |
1573 | #endif |
1574 | #ifdef CONFIG_GLUSTERFS_ZEROFILL | |
e88a36eb | 1575 | .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes, |
0c14fb47 | 1576 | #endif |
08c9e773 | 1577 | .bdrv_co_block_status = qemu_gluster_co_block_status, |
de23e72b | 1578 | .bdrv_refresh_limits = qemu_gluster_refresh_limits, |
90c772de | 1579 | .create_opts = &qemu_gluster_create_opts, |
2654267c | 1580 | .strong_runtime_opts = gluster_strong_open_opts, |
8d6d89cb BR |
1581 | }; |
1582 | ||
1583 | static BlockDriver bdrv_gluster_tcp = { | |
1584 | .format_name = "gluster", | |
1585 | .protocol_name = "gluster+tcp", | |
1586 | .instance_size = sizeof(BDRVGlusterState), | |
1587 | .bdrv_file_open = qemu_gluster_open, | |
adccfbcd JC |
1588 | .bdrv_reopen_prepare = qemu_gluster_reopen_prepare, |
1589 | .bdrv_reopen_commit = qemu_gluster_reopen_commit, | |
1590 | .bdrv_reopen_abort = qemu_gluster_reopen_abort, | |
8d6d89cb | 1591 | .bdrv_close = qemu_gluster_close, |
ab8bda76 | 1592 | .bdrv_co_create = qemu_gluster_co_create, |
efc75e2a | 1593 | .bdrv_co_create_opts = qemu_gluster_co_create_opts, |
c86422c5 | 1594 | .bdrv_co_getlength = qemu_gluster_co_getlength, |
82618d7b | 1595 | .bdrv_co_get_allocated_file_size = qemu_gluster_co_get_allocated_file_size, |
061ca8a3 | 1596 | .bdrv_co_truncate = qemu_gluster_co_truncate, |
15744b0b BR |
1597 | .bdrv_co_readv = qemu_gluster_co_readv, |
1598 | .bdrv_co_writev = qemu_gluster_co_writev, | |
1599 | .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk, | |
0c14fb47 | 1600 | #ifdef CONFIG_GLUSTERFS_DISCARD |
1014170b | 1601 | .bdrv_co_pdiscard = qemu_gluster_co_pdiscard, |
7c815372 BR |
1602 | #endif |
1603 | #ifdef CONFIG_GLUSTERFS_ZEROFILL | |
e88a36eb | 1604 | .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes, |
0c14fb47 | 1605 | #endif |
08c9e773 | 1606 | .bdrv_co_block_status = qemu_gluster_co_block_status, |
de23e72b | 1607 | .bdrv_refresh_limits = qemu_gluster_refresh_limits, |
90c772de | 1608 | .create_opts = &qemu_gluster_create_opts, |
2654267c | 1609 | .strong_runtime_opts = gluster_strong_open_opts, |
8d6d89cb BR |
1610 | }; |
1611 | ||
1612 | static BlockDriver bdrv_gluster_unix = { | |
1613 | .format_name = "gluster", | |
1614 | .protocol_name = "gluster+unix", | |
1615 | .instance_size = sizeof(BDRVGlusterState), | |
1616 | .bdrv_file_open = qemu_gluster_open, | |
adccfbcd JC |
1617 | .bdrv_reopen_prepare = qemu_gluster_reopen_prepare, |
1618 | .bdrv_reopen_commit = qemu_gluster_reopen_commit, | |
1619 | .bdrv_reopen_abort = qemu_gluster_reopen_abort, | |
8d6d89cb | 1620 | .bdrv_close = qemu_gluster_close, |
ab8bda76 | 1621 | .bdrv_co_create = qemu_gluster_co_create, |
efc75e2a | 1622 | .bdrv_co_create_opts = qemu_gluster_co_create_opts, |
c86422c5 | 1623 | .bdrv_co_getlength = qemu_gluster_co_getlength, |
82618d7b | 1624 | .bdrv_co_get_allocated_file_size = qemu_gluster_co_get_allocated_file_size, |
061ca8a3 | 1625 | .bdrv_co_truncate = qemu_gluster_co_truncate, |
15744b0b BR |
1626 | .bdrv_co_readv = qemu_gluster_co_readv, |
1627 | .bdrv_co_writev = qemu_gluster_co_writev, | |
1628 | .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk, | |
0c14fb47 | 1629 | #ifdef CONFIG_GLUSTERFS_DISCARD |
1014170b | 1630 | .bdrv_co_pdiscard = qemu_gluster_co_pdiscard, |
7c815372 BR |
1631 | #endif |
1632 | #ifdef CONFIG_GLUSTERFS_ZEROFILL | |
e88a36eb | 1633 | .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes, |
0c14fb47 | 1634 | #endif |
08c9e773 | 1635 | .bdrv_co_block_status = qemu_gluster_co_block_status, |
de23e72b | 1636 | .bdrv_refresh_limits = qemu_gluster_refresh_limits, |
90c772de | 1637 | .create_opts = &qemu_gluster_create_opts, |
2654267c | 1638 | .strong_runtime_opts = gluster_strong_open_opts, |
8d6d89cb BR |
1639 | }; |
1640 | ||
0552ff24 PKK |
1641 | /* rdma is deprecated (actually never supported for volfile fetch). |
1642 | * Let's maintain it for the protocol compatibility, to make sure things | |
1643 | * won't break immediately. For now, gluster+rdma will fall back to gluster+tcp | |
1644 | * protocol with a warning. | |
1645 | * TODO: remove gluster+rdma interface support | |
1646 | */ | |
8d6d89cb BR |
1647 | static BlockDriver bdrv_gluster_rdma = { |
1648 | .format_name = "gluster", | |
1649 | .protocol_name = "gluster+rdma", | |
1650 | .instance_size = sizeof(BDRVGlusterState), | |
1651 | .bdrv_file_open = qemu_gluster_open, | |
adccfbcd JC |
1652 | .bdrv_reopen_prepare = qemu_gluster_reopen_prepare, |
1653 | .bdrv_reopen_commit = qemu_gluster_reopen_commit, | |
1654 | .bdrv_reopen_abort = qemu_gluster_reopen_abort, | |
8d6d89cb | 1655 | .bdrv_close = qemu_gluster_close, |
ab8bda76 | 1656 | .bdrv_co_create = qemu_gluster_co_create, |
efc75e2a | 1657 | .bdrv_co_create_opts = qemu_gluster_co_create_opts, |
c86422c5 | 1658 | .bdrv_co_getlength = qemu_gluster_co_getlength, |
82618d7b | 1659 | .bdrv_co_get_allocated_file_size = qemu_gluster_co_get_allocated_file_size, |
061ca8a3 | 1660 | .bdrv_co_truncate = qemu_gluster_co_truncate, |
15744b0b BR |
1661 | .bdrv_co_readv = qemu_gluster_co_readv, |
1662 | .bdrv_co_writev = qemu_gluster_co_writev, | |
1663 | .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk, | |
0c14fb47 | 1664 | #ifdef CONFIG_GLUSTERFS_DISCARD |
1014170b | 1665 | .bdrv_co_pdiscard = qemu_gluster_co_pdiscard, |
7c815372 BR |
1666 | #endif |
1667 | #ifdef CONFIG_GLUSTERFS_ZEROFILL | |
e88a36eb | 1668 | .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes, |
0c14fb47 | 1669 | #endif |
08c9e773 | 1670 | .bdrv_co_block_status = qemu_gluster_co_block_status, |
de23e72b | 1671 | .bdrv_refresh_limits = qemu_gluster_refresh_limits, |
90c772de | 1672 | .create_opts = &qemu_gluster_create_opts, |
2654267c | 1673 | .strong_runtime_opts = gluster_strong_open_opts, |
8d6d89cb BR |
1674 | }; |
1675 | ||
1676 | static void bdrv_gluster_init(void) | |
1677 | { | |
1678 | bdrv_register(&bdrv_gluster_rdma); | |
1679 | bdrv_register(&bdrv_gluster_unix); | |
1680 | bdrv_register(&bdrv_gluster_tcp); | |
1681 | bdrv_register(&bdrv_gluster); | |
1682 | } | |
1683 | ||
1684 | block_init(bdrv_gluster_init); |