hw/elf_ops: Fix a typo
[qemu/ar7.git] / block / gluster.c
blobe8ee14c8e9bfc8b58fd34fc0e3c3bfc2253f8ba6
1 /*
2 * GlusterFS backend for QEMU
4 * Copyright (C) 2012 Bharata B Rao <bharata@linux.vnet.ibm.com>
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.
9 */
11 #include "qemu/osdep.h"
12 #include "qemu/units.h"
13 #include <glusterfs/api/glfs.h>
14 #include "block/block_int.h"
15 #include "block/qdict.h"
16 #include "qapi/error.h"
17 #include "qapi/qmp/qdict.h"
18 #include "qapi/qmp/qerror.h"
19 #include "qemu/uri.h"
20 #include "qemu/error-report.h"
21 #include "qemu/module.h"
22 #include "qemu/option.h"
23 #include "qemu/cutils.h"
25 #ifdef CONFIG_GLUSTERFS_FTRUNCATE_HAS_STAT
26 # define glfs_ftruncate(fd, offset) glfs_ftruncate(fd, offset, NULL, NULL)
27 #endif
29 #define GLUSTER_OPT_FILENAME "filename"
30 #define GLUSTER_OPT_VOLUME "volume"
31 #define GLUSTER_OPT_PATH "path"
32 #define GLUSTER_OPT_TYPE "type"
33 #define GLUSTER_OPT_SERVER_PATTERN "server."
34 #define GLUSTER_OPT_HOST "host"
35 #define GLUSTER_OPT_PORT "port"
36 #define GLUSTER_OPT_TO "to"
37 #define GLUSTER_OPT_IPV4 "ipv4"
38 #define GLUSTER_OPT_IPV6 "ipv6"
39 #define GLUSTER_OPT_SOCKET "socket"
40 #define GLUSTER_OPT_DEBUG "debug"
41 #define GLUSTER_DEFAULT_PORT 24007
42 #define GLUSTER_DEBUG_DEFAULT 4
43 #define GLUSTER_DEBUG_MAX 9
44 #define GLUSTER_OPT_LOGFILE "logfile"
45 #define GLUSTER_LOGFILE_DEFAULT "-" /* handled in libgfapi as /dev/stderr */
47 * Several versions of GlusterFS (3.12? -> 6.0.1) fail when the transfer size
48 * is greater or equal to 1024 MiB, so we are limiting the transfer size to 512
49 * MiB to avoid this rare issue.
51 #define GLUSTER_MAX_TRANSFER (512 * MiB)
53 #define GERR_INDEX_HINT "hint: check in 'server' array index '%d'\n"
55 typedef struct GlusterAIOCB {
56 int64_t size;
57 int ret;
58 Coroutine *coroutine;
59 AioContext *aio_context;
60 } GlusterAIOCB;
62 typedef struct BDRVGlusterState {
63 struct glfs *glfs;
64 struct glfs_fd *fd;
65 char *logfile;
66 bool supports_seek_data;
67 int debug;
68 } BDRVGlusterState;
70 typedef struct BDRVGlusterReopenState {
71 struct glfs *glfs;
72 struct glfs_fd *fd;
73 } BDRVGlusterReopenState;
76 typedef struct GlfsPreopened {
77 char *volume;
78 glfs_t *fs;
79 int ref;
80 } GlfsPreopened;
82 typedef struct ListElement {
83 QLIST_ENTRY(ListElement) list;
84 GlfsPreopened saved;
85 } ListElement;
87 static QLIST_HEAD(, ListElement) glfs_list;
89 static QemuOptsList qemu_gluster_create_opts = {
90 .name = "qemu-gluster-create-opts",
91 .head = QTAILQ_HEAD_INITIALIZER(qemu_gluster_create_opts.head),
92 .desc = {
94 .name = BLOCK_OPT_SIZE,
95 .type = QEMU_OPT_SIZE,
96 .help = "Virtual disk size"
99 .name = BLOCK_OPT_PREALLOC,
100 .type = QEMU_OPT_STRING,
101 .help = "Preallocation mode (allowed values: off"
102 #ifdef CONFIG_GLUSTERFS_FALLOCATE
103 ", falloc"
104 #endif
105 #ifdef CONFIG_GLUSTERFS_ZEROFILL
106 ", full"
107 #endif
111 .name = GLUSTER_OPT_DEBUG,
112 .type = QEMU_OPT_NUMBER,
113 .help = "Gluster log level, valid range is 0-9",
116 .name = GLUSTER_OPT_LOGFILE,
117 .type = QEMU_OPT_STRING,
118 .help = "Logfile path of libgfapi",
120 { /* end of list */ }
124 static QemuOptsList runtime_opts = {
125 .name = "gluster",
126 .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head),
127 .desc = {
129 .name = GLUSTER_OPT_FILENAME,
130 .type = QEMU_OPT_STRING,
131 .help = "URL to the gluster image",
134 .name = GLUSTER_OPT_DEBUG,
135 .type = QEMU_OPT_NUMBER,
136 .help = "Gluster log level, valid range is 0-9",
139 .name = GLUSTER_OPT_LOGFILE,
140 .type = QEMU_OPT_STRING,
141 .help = "Logfile path of libgfapi",
143 { /* end of list */ }
147 static QemuOptsList runtime_json_opts = {
148 .name = "gluster_json",
149 .head = QTAILQ_HEAD_INITIALIZER(runtime_json_opts.head),
150 .desc = {
152 .name = GLUSTER_OPT_VOLUME,
153 .type = QEMU_OPT_STRING,
154 .help = "name of gluster volume where VM image resides",
157 .name = GLUSTER_OPT_PATH,
158 .type = QEMU_OPT_STRING,
159 .help = "absolute path to image file in gluster volume",
162 .name = GLUSTER_OPT_DEBUG,
163 .type = QEMU_OPT_NUMBER,
164 .help = "Gluster log level, valid range is 0-9",
166 { /* end of list */ }
170 static QemuOptsList runtime_type_opts = {
171 .name = "gluster_type",
172 .head = QTAILQ_HEAD_INITIALIZER(runtime_type_opts.head),
173 .desc = {
175 .name = GLUSTER_OPT_TYPE,
176 .type = QEMU_OPT_STRING,
177 .help = "inet|unix",
179 { /* end of list */ }
183 static QemuOptsList runtime_unix_opts = {
184 .name = "gluster_unix",
185 .head = QTAILQ_HEAD_INITIALIZER(runtime_unix_opts.head),
186 .desc = {
188 .name = GLUSTER_OPT_SOCKET,
189 .type = QEMU_OPT_STRING,
190 .help = "socket file path (legacy)",
193 .name = GLUSTER_OPT_PATH,
194 .type = QEMU_OPT_STRING,
195 .help = "socket file path (QAPI)",
197 { /* end of list */ }
201 static QemuOptsList runtime_inet_opts = {
202 .name = "gluster_inet",
203 .head = QTAILQ_HEAD_INITIALIZER(runtime_inet_opts.head),
204 .desc = {
206 .name = GLUSTER_OPT_TYPE,
207 .type = QEMU_OPT_STRING,
208 .help = "inet|unix",
211 .name = GLUSTER_OPT_HOST,
212 .type = QEMU_OPT_STRING,
213 .help = "host address (hostname/ipv4/ipv6 addresses)",
216 .name = GLUSTER_OPT_PORT,
217 .type = QEMU_OPT_STRING,
218 .help = "port number on which glusterd is listening (default 24007)",
221 .name = "to",
222 .type = QEMU_OPT_NUMBER,
223 .help = "max port number, not supported by gluster",
226 .name = "ipv4",
227 .type = QEMU_OPT_BOOL,
228 .help = "ipv4 bool value, not supported by gluster",
231 .name = "ipv6",
232 .type = QEMU_OPT_BOOL,
233 .help = "ipv6 bool value, not supported by gluster",
235 { /* end of list */ }
239 static void glfs_set_preopened(const char *volume, glfs_t *fs)
241 ListElement *entry = NULL;
243 entry = g_new(ListElement, 1);
245 entry->saved.volume = g_strdup(volume);
247 entry->saved.fs = fs;
248 entry->saved.ref = 1;
250 QLIST_INSERT_HEAD(&glfs_list, entry, list);
253 static glfs_t *glfs_find_preopened(const char *volume)
255 ListElement *entry = NULL;
257 QLIST_FOREACH(entry, &glfs_list, list) {
258 if (strcmp(entry->saved.volume, volume) == 0) {
259 entry->saved.ref++;
260 return entry->saved.fs;
264 return NULL;
267 static void glfs_clear_preopened(glfs_t *fs)
269 ListElement *entry = NULL;
270 ListElement *next;
272 if (fs == NULL) {
273 return;
276 QLIST_FOREACH_SAFE(entry, &glfs_list, list, next) {
277 if (entry->saved.fs == fs) {
278 if (--entry->saved.ref) {
279 return;
282 QLIST_REMOVE(entry, list);
284 glfs_fini(entry->saved.fs);
285 g_free(entry->saved.volume);
286 g_free(entry);
291 static int parse_volume_options(BlockdevOptionsGluster *gconf, char *path)
293 char *p, *q;
295 if (!path) {
296 return -EINVAL;
299 /* volume */
300 p = q = path + strspn(path, "/");
301 p += strcspn(p, "/");
302 if (*p == '\0') {
303 return -EINVAL;
305 gconf->volume = g_strndup(q, p - q);
307 /* path */
308 p += strspn(p, "/");
309 if (*p == '\0') {
310 return -EINVAL;
312 gconf->path = g_strdup(p);
313 return 0;
317 * file=gluster[+transport]://[host[:port]]/volume/path[?socket=...]
319 * 'gluster' is the protocol.
321 * 'transport' specifies the transport type used to connect to gluster
322 * management daemon (glusterd). Valid transport types are
323 * tcp or unix. If a transport type isn't specified, then tcp type is assumed.
325 * 'host' specifies the host where the volume file specification for
326 * the given volume resides. This can be either hostname or ipv4 address.
327 * If transport type is 'unix', then 'host' field should not be specified.
328 * The 'socket' field needs to be populated with the path to unix domain
329 * socket.
331 * 'port' is the port number on which glusterd is listening. This is optional
332 * and if not specified, QEMU will send 0 which will make gluster to use the
333 * default port. If the transport type is unix, then 'port' should not be
334 * specified.
336 * 'volume' is the name of the gluster volume which contains the VM image.
338 * 'path' is the path to the actual VM image that resides on gluster volume.
340 * Examples:
342 * file=gluster://1.2.3.4/testvol/a.img
343 * file=gluster+tcp://1.2.3.4/testvol/a.img
344 * file=gluster+tcp://1.2.3.4:24007/testvol/dir/a.img
345 * file=gluster+tcp://host.domain.com:24007/testvol/dir/a.img
346 * file=gluster+unix:///testvol/dir/a.img?socket=/tmp/glusterd.socket
348 static int qemu_gluster_parse_uri(BlockdevOptionsGluster *gconf,
349 const char *filename)
351 SocketAddress *gsconf;
352 URI *uri;
353 QueryParams *qp = NULL;
354 bool is_unix = false;
355 int ret = 0;
357 uri = uri_parse(filename);
358 if (!uri) {
359 return -EINVAL;
362 gsconf = g_new0(SocketAddress, 1);
363 QAPI_LIST_PREPEND(gconf->server, gsconf);
365 /* transport */
366 if (!uri->scheme || !strcmp(uri->scheme, "gluster")) {
367 gsconf->type = SOCKET_ADDRESS_TYPE_INET;
368 } else if (!strcmp(uri->scheme, "gluster+tcp")) {
369 gsconf->type = SOCKET_ADDRESS_TYPE_INET;
370 } else if (!strcmp(uri->scheme, "gluster+unix")) {
371 gsconf->type = SOCKET_ADDRESS_TYPE_UNIX;
372 is_unix = true;
373 } else if (!strcmp(uri->scheme, "gluster+rdma")) {
374 gsconf->type = SOCKET_ADDRESS_TYPE_INET;
375 warn_report("rdma feature is not supported, falling back to tcp");
376 } else {
377 ret = -EINVAL;
378 goto out;
381 ret = parse_volume_options(gconf, uri->path);
382 if (ret < 0) {
383 goto out;
386 qp = query_params_parse(uri->query);
387 if (qp->n > 1 || (is_unix && !qp->n) || (!is_unix && qp->n)) {
388 ret = -EINVAL;
389 goto out;
392 if (is_unix) {
393 if (uri->server || uri->port) {
394 ret = -EINVAL;
395 goto out;
397 if (strcmp(qp->p[0].name, "socket")) {
398 ret = -EINVAL;
399 goto out;
401 gsconf->u.q_unix.path = g_strdup(qp->p[0].value);
402 } else {
403 gsconf->u.inet.host = g_strdup(uri->server ? uri->server : "localhost");
404 if (uri->port) {
405 gsconf->u.inet.port = g_strdup_printf("%d", uri->port);
406 } else {
407 gsconf->u.inet.port = g_strdup_printf("%d", GLUSTER_DEFAULT_PORT);
411 out:
412 if (qp) {
413 query_params_free(qp);
415 uri_free(uri);
416 return ret;
419 static struct glfs *qemu_gluster_glfs_init(BlockdevOptionsGluster *gconf,
420 Error **errp)
422 struct glfs *glfs;
423 int ret;
424 int old_errno;
425 SocketAddressList *server;
426 unsigned long long port;
428 glfs = glfs_find_preopened(gconf->volume);
429 if (glfs) {
430 return glfs;
433 glfs = glfs_new(gconf->volume);
434 if (!glfs) {
435 goto out;
438 glfs_set_preopened(gconf->volume, glfs);
440 for (server = gconf->server; server; server = server->next) {
441 switch (server->value->type) {
442 case SOCKET_ADDRESS_TYPE_UNIX:
443 ret = glfs_set_volfile_server(glfs, "unix",
444 server->value->u.q_unix.path, 0);
445 break;
446 case SOCKET_ADDRESS_TYPE_INET:
447 if (parse_uint_full(server->value->u.inet.port, &port, 10) < 0 ||
448 port > 65535) {
449 error_setg(errp, "'%s' is not a valid port number",
450 server->value->u.inet.port);
451 errno = EINVAL;
452 goto out;
454 ret = glfs_set_volfile_server(glfs, "tcp",
455 server->value->u.inet.host,
456 (int)port);
457 break;
458 case SOCKET_ADDRESS_TYPE_VSOCK:
459 case SOCKET_ADDRESS_TYPE_FD:
460 default:
461 abort();
464 if (ret < 0) {
465 goto out;
469 ret = glfs_set_logging(glfs, gconf->logfile, gconf->debug);
470 if (ret < 0) {
471 goto out;
474 ret = glfs_init(glfs);
475 if (ret) {
476 error_setg(errp, "Gluster connection for volume %s, path %s failed"
477 " to connect", gconf->volume, gconf->path);
478 for (server = gconf->server; server; server = server->next) {
479 if (server->value->type == SOCKET_ADDRESS_TYPE_UNIX) {
480 error_append_hint(errp, "hint: failed on socket %s ",
481 server->value->u.q_unix.path);
482 } else {
483 error_append_hint(errp, "hint: failed on host %s and port %s ",
484 server->value->u.inet.host,
485 server->value->u.inet.port);
489 error_append_hint(errp, "Please refer to gluster logs for more info\n");
491 /* glfs_init sometimes doesn't set errno although docs suggest that */
492 if (errno == 0) {
493 errno = EINVAL;
496 goto out;
498 return glfs;
500 out:
501 if (glfs) {
502 old_errno = errno;
503 glfs_clear_preopened(glfs);
504 errno = old_errno;
506 return NULL;
510 * Convert the json formatted command line into qapi.
512 static int qemu_gluster_parse_json(BlockdevOptionsGluster *gconf,
513 QDict *options, Error **errp)
515 QemuOpts *opts;
516 SocketAddress *gsconf = NULL;
517 SocketAddressList **tail;
518 QDict *backing_options = NULL;
519 Error *local_err = NULL;
520 char *str = NULL;
521 const char *ptr;
522 int i, type, num_servers;
524 /* create opts info from runtime_json_opts list */
525 opts = qemu_opts_create(&runtime_json_opts, NULL, 0, &error_abort);
526 if (!qemu_opts_absorb_qdict(opts, options, errp)) {
527 goto out;
530 num_servers = qdict_array_entries(options, GLUSTER_OPT_SERVER_PATTERN);
531 if (num_servers < 1) {
532 error_setg(&local_err, QERR_MISSING_PARAMETER, "server");
533 goto out;
536 ptr = qemu_opt_get(opts, GLUSTER_OPT_VOLUME);
537 if (!ptr) {
538 error_setg(&local_err, QERR_MISSING_PARAMETER, GLUSTER_OPT_VOLUME);
539 goto out;
541 gconf->volume = g_strdup(ptr);
543 ptr = qemu_opt_get(opts, GLUSTER_OPT_PATH);
544 if (!ptr) {
545 error_setg(&local_err, QERR_MISSING_PARAMETER, GLUSTER_OPT_PATH);
546 goto out;
548 gconf->path = g_strdup(ptr);
549 qemu_opts_del(opts);
550 tail = &gconf->server;
552 for (i = 0; i < num_servers; i++) {
553 str = g_strdup_printf(GLUSTER_OPT_SERVER_PATTERN"%d.", i);
554 qdict_extract_subqdict(options, &backing_options, str);
556 /* create opts info from runtime_type_opts list */
557 opts = qemu_opts_create(&runtime_type_opts, NULL, 0, &error_abort);
558 if (!qemu_opts_absorb_qdict(opts, backing_options, errp)) {
559 goto out;
562 ptr = qemu_opt_get(opts, GLUSTER_OPT_TYPE);
563 if (!ptr) {
564 error_setg(&local_err, QERR_MISSING_PARAMETER, GLUSTER_OPT_TYPE);
565 error_append_hint(&local_err, GERR_INDEX_HINT, i);
566 goto out;
569 gsconf = g_new0(SocketAddress, 1);
570 if (!strcmp(ptr, "tcp")) {
571 ptr = "inet"; /* accept legacy "tcp" */
573 type = qapi_enum_parse(&SocketAddressType_lookup, ptr, -1, NULL);
574 if (type != SOCKET_ADDRESS_TYPE_INET
575 && type != SOCKET_ADDRESS_TYPE_UNIX) {
576 error_setg(&local_err,
577 "Parameter '%s' may be 'inet' or 'unix'",
578 GLUSTER_OPT_TYPE);
579 error_append_hint(&local_err, GERR_INDEX_HINT, i);
580 goto out;
582 gsconf->type = type;
583 qemu_opts_del(opts);
585 if (gsconf->type == SOCKET_ADDRESS_TYPE_INET) {
586 /* create opts info from runtime_inet_opts list */
587 opts = qemu_opts_create(&runtime_inet_opts, NULL, 0, &error_abort);
588 if (!qemu_opts_absorb_qdict(opts, backing_options, errp)) {
589 goto out;
592 ptr = qemu_opt_get(opts, GLUSTER_OPT_HOST);
593 if (!ptr) {
594 error_setg(&local_err, QERR_MISSING_PARAMETER,
595 GLUSTER_OPT_HOST);
596 error_append_hint(&local_err, GERR_INDEX_HINT, i);
597 goto out;
599 gsconf->u.inet.host = g_strdup(ptr);
600 ptr = qemu_opt_get(opts, GLUSTER_OPT_PORT);
601 if (!ptr) {
602 error_setg(&local_err, QERR_MISSING_PARAMETER,
603 GLUSTER_OPT_PORT);
604 error_append_hint(&local_err, GERR_INDEX_HINT, i);
605 goto out;
607 gsconf->u.inet.port = g_strdup(ptr);
609 /* defend for unsupported fields in InetSocketAddress,
610 * i.e. @ipv4, @ipv6 and @to
612 ptr = qemu_opt_get(opts, GLUSTER_OPT_TO);
613 if (ptr) {
614 gsconf->u.inet.has_to = true;
616 ptr = qemu_opt_get(opts, GLUSTER_OPT_IPV4);
617 if (ptr) {
618 gsconf->u.inet.has_ipv4 = true;
620 ptr = qemu_opt_get(opts, GLUSTER_OPT_IPV6);
621 if (ptr) {
622 gsconf->u.inet.has_ipv6 = true;
624 if (gsconf->u.inet.has_to) {
625 error_setg(&local_err, "Parameter 'to' not supported");
626 goto out;
628 if (gsconf->u.inet.has_ipv4 || gsconf->u.inet.has_ipv6) {
629 error_setg(&local_err, "Parameters 'ipv4/ipv6' not supported");
630 goto out;
632 qemu_opts_del(opts);
633 } else {
634 /* create opts info from runtime_unix_opts list */
635 opts = qemu_opts_create(&runtime_unix_opts, NULL, 0, &error_abort);
636 if (!qemu_opts_absorb_qdict(opts, backing_options, errp)) {
637 goto out;
640 ptr = qemu_opt_get(opts, GLUSTER_OPT_PATH);
641 if (!ptr) {
642 ptr = qemu_opt_get(opts, GLUSTER_OPT_SOCKET);
643 } else if (qemu_opt_get(opts, GLUSTER_OPT_SOCKET)) {
644 error_setg(&local_err,
645 "Conflicting parameters 'path' and 'socket'");
646 error_append_hint(&local_err, GERR_INDEX_HINT, i);
647 goto out;
649 if (!ptr) {
650 error_setg(&local_err, QERR_MISSING_PARAMETER,
651 GLUSTER_OPT_PATH);
652 error_append_hint(&local_err, GERR_INDEX_HINT, i);
653 goto out;
655 gsconf->u.q_unix.path = g_strdup(ptr);
656 qemu_opts_del(opts);
659 QAPI_LIST_APPEND(tail, gsconf);
660 gsconf = NULL;
662 qobject_unref(backing_options);
663 backing_options = NULL;
664 g_free(str);
665 str = NULL;
668 return 0;
670 out:
671 error_propagate(errp, local_err);
672 qapi_free_SocketAddress(gsconf);
673 qemu_opts_del(opts);
674 g_free(str);
675 qobject_unref(backing_options);
676 errno = EINVAL;
677 return -errno;
680 /* Converts options given in @filename and the @options QDict into the QAPI
681 * object @gconf. */
682 static int qemu_gluster_parse(BlockdevOptionsGluster *gconf,
683 const char *filename,
684 QDict *options, Error **errp)
686 int ret;
687 if (filename) {
688 ret = qemu_gluster_parse_uri(gconf, filename);
689 if (ret < 0) {
690 error_setg(errp, "invalid URI %s", filename);
691 error_append_hint(errp, "Usage: file=gluster[+transport]://"
692 "[host[:port]]volume/path[?socket=...]"
693 "[,file.debug=N]"
694 "[,file.logfile=/path/filename.log]\n");
695 return ret;
697 } else {
698 ret = qemu_gluster_parse_json(gconf, options, errp);
699 if (ret < 0) {
700 error_append_hint(errp, "Usage: "
701 "-drive driver=qcow2,file.driver=gluster,"
702 "file.volume=testvol,file.path=/path/a.qcow2"
703 "[,file.debug=9]"
704 "[,file.logfile=/path/filename.log],"
705 "file.server.0.type=inet,"
706 "file.server.0.host=1.2.3.4,"
707 "file.server.0.port=24007,"
708 "file.server.1.transport=unix,"
709 "file.server.1.path=/var/run/glusterd.socket ..."
710 "\n");
711 return ret;
715 return 0;
718 static struct glfs *qemu_gluster_init(BlockdevOptionsGluster *gconf,
719 const char *filename,
720 QDict *options, Error **errp)
722 int ret;
724 ret = qemu_gluster_parse(gconf, filename, options, errp);
725 if (ret < 0) {
726 errno = -ret;
727 return NULL;
730 return qemu_gluster_glfs_init(gconf, errp);
734 * AIO callback routine called from GlusterFS thread.
736 static void gluster_finish_aiocb(struct glfs_fd *fd, ssize_t ret,
737 #ifdef CONFIG_GLUSTERFS_IOCB_HAS_STAT
738 struct glfs_stat *pre, struct glfs_stat *post,
739 #endif
740 void *arg)
742 GlusterAIOCB *acb = (GlusterAIOCB *)arg;
744 if (!ret || ret == acb->size) {
745 acb->ret = 0; /* Success */
746 } else if (ret < 0) {
747 acb->ret = -errno; /* Read/Write failed */
748 } else {
749 acb->ret = -EIO; /* Partial read/write - fail it */
752 aio_co_schedule(acb->aio_context, acb->coroutine);
755 static void qemu_gluster_parse_flags(int bdrv_flags, int *open_flags)
757 assert(open_flags != NULL);
759 *open_flags |= O_BINARY;
761 if (bdrv_flags & BDRV_O_RDWR) {
762 *open_flags |= O_RDWR;
763 } else {
764 *open_flags |= O_RDONLY;
767 if ((bdrv_flags & BDRV_O_NOCACHE)) {
768 *open_flags |= O_DIRECT;
773 * Do SEEK_DATA/HOLE to detect if it is functional. Older broken versions of
774 * gfapi incorrectly return the current offset when SEEK_DATA/HOLE is used.
775 * - Corrected versions return -1 and set errno to EINVAL.
776 * - Versions that support SEEK_DATA/HOLE correctly, will return -1 and set
777 * errno to ENXIO when SEEK_DATA is called with a position of EOF.
779 static bool qemu_gluster_test_seek(struct glfs_fd *fd)
781 off_t ret = 0;
783 #if defined SEEK_HOLE && defined SEEK_DATA
784 off_t eof;
786 eof = glfs_lseek(fd, 0, SEEK_END);
787 if (eof < 0) {
788 /* this should never occur */
789 return false;
792 /* this should always fail with ENXIO if SEEK_DATA is supported */
793 ret = glfs_lseek(fd, eof, SEEK_DATA);
794 #endif
796 return (ret < 0) && (errno == ENXIO);
799 static int qemu_gluster_open(BlockDriverState *bs, QDict *options,
800 int bdrv_flags, Error **errp)
802 BDRVGlusterState *s = bs->opaque;
803 int open_flags = 0;
804 int ret = 0;
805 BlockdevOptionsGluster *gconf = NULL;
806 QemuOpts *opts;
807 const char *filename, *logfile;
809 opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
810 if (!qemu_opts_absorb_qdict(opts, options, errp)) {
811 ret = -EINVAL;
812 goto out;
815 filename = qemu_opt_get(opts, GLUSTER_OPT_FILENAME);
817 s->debug = qemu_opt_get_number(opts, GLUSTER_OPT_DEBUG,
818 GLUSTER_DEBUG_DEFAULT);
819 if (s->debug < 0) {
820 s->debug = 0;
821 } else if (s->debug > GLUSTER_DEBUG_MAX) {
822 s->debug = GLUSTER_DEBUG_MAX;
825 gconf = g_new0(BlockdevOptionsGluster, 1);
826 gconf->debug = s->debug;
827 gconf->has_debug = true;
829 logfile = qemu_opt_get(opts, GLUSTER_OPT_LOGFILE);
830 s->logfile = g_strdup(logfile ? logfile : GLUSTER_LOGFILE_DEFAULT);
832 gconf->logfile = g_strdup(s->logfile);
833 gconf->has_logfile = true;
835 s->glfs = qemu_gluster_init(gconf, filename, options, errp);
836 if (!s->glfs) {
837 ret = -errno;
838 goto out;
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;
856 #endif
858 qemu_gluster_parse_flags(bdrv_flags, &open_flags);
860 s->fd = glfs_open(s->glfs, gconf->path, open_flags);
861 ret = s->fd ? 0 : -errno;
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. */
866 if (bdrv_apply_auto_read_only(bs, NULL, NULL) == 0) {
867 open_flags = (open_flags & ~O_RDWR) | O_RDONLY;
868 s->fd = glfs_open(s->glfs, gconf->path, open_flags);
869 ret = s->fd ? 0 : -errno;
873 s->supports_seek_data = qemu_gluster_test_seek(s->fd);
875 out:
876 qemu_opts_del(opts);
877 qapi_free_BlockdevOptionsGluster(gconf);
878 if (!ret) {
879 return ret;
881 g_free(s->logfile);
882 if (s->fd) {
883 glfs_close(s->fd);
886 glfs_clear_preopened(s->glfs);
888 return ret;
891 static void qemu_gluster_refresh_limits(BlockDriverState *bs, Error **errp)
893 bs->bl.max_transfer = GLUSTER_MAX_TRANSFER;
896 static int qemu_gluster_reopen_prepare(BDRVReopenState *state,
897 BlockReopenQueue *queue, Error **errp)
899 int ret = 0;
900 BDRVGlusterState *s;
901 BDRVGlusterReopenState *reop_s;
902 BlockdevOptionsGluster *gconf;
903 int open_flags = 0;
905 assert(state != NULL);
906 assert(state->bs != NULL);
908 s = state->bs->opaque;
910 state->opaque = g_new0(BDRVGlusterReopenState, 1);
911 reop_s = state->opaque;
913 qemu_gluster_parse_flags(state->flags, &open_flags);
915 gconf = g_new0(BlockdevOptionsGluster, 1);
916 gconf->debug = s->debug;
917 gconf->has_debug = true;
918 gconf->logfile = g_strdup(s->logfile);
919 gconf->has_logfile = true;
922 * If 'state->bs->exact_filename' is empty, 'state->options' should contain
923 * the JSON parameters already parsed.
925 if (state->bs->exact_filename[0] != '\0') {
926 reop_s->glfs = qemu_gluster_init(gconf, state->bs->exact_filename, NULL,
927 errp);
928 } else {
929 reop_s->glfs = qemu_gluster_init(gconf, NULL, state->options, errp);
931 if (reop_s->glfs == NULL) {
932 ret = -errno;
933 goto exit;
936 #ifdef CONFIG_GLUSTERFS_XLATOR_OPT
937 ret = glfs_set_xlator_option(reop_s->glfs, "*-write-behind",
938 "resync-failed-syncs-after-fsync", "on");
939 if (ret < 0) {
940 error_setg_errno(errp, errno, "Unable to set xlator key/value pair");
941 ret = -errno;
942 goto exit;
944 #endif
946 reop_s->fd = glfs_open(reop_s->glfs, gconf->path, open_flags);
947 if (reop_s->fd == NULL) {
948 /* reops->glfs will be cleaned up in _abort */
949 ret = -errno;
950 goto exit;
953 exit:
954 /* state->opaque will be freed in either the _abort or _commit */
955 qapi_free_BlockdevOptionsGluster(gconf);
956 return ret;
959 static void qemu_gluster_reopen_commit(BDRVReopenState *state)
961 BDRVGlusterReopenState *reop_s = state->opaque;
962 BDRVGlusterState *s = state->bs->opaque;
965 /* close the old */
966 if (s->fd) {
967 glfs_close(s->fd);
970 glfs_clear_preopened(s->glfs);
972 /* use the newly opened image / connection */
973 s->fd = reop_s->fd;
974 s->glfs = reop_s->glfs;
976 g_free(state->opaque);
977 state->opaque = NULL;
979 return;
983 static void qemu_gluster_reopen_abort(BDRVReopenState *state)
985 BDRVGlusterReopenState *reop_s = state->opaque;
987 if (reop_s == NULL) {
988 return;
991 if (reop_s->fd) {
992 glfs_close(reop_s->fd);
995 glfs_clear_preopened(reop_s->glfs);
997 g_free(state->opaque);
998 state->opaque = NULL;
1000 return;
1003 #ifdef CONFIG_GLUSTERFS_ZEROFILL
1004 static coroutine_fn int qemu_gluster_co_pwrite_zeroes(BlockDriverState *bs,
1005 int64_t offset,
1006 int size,
1007 BdrvRequestFlags flags)
1009 int ret;
1010 GlusterAIOCB acb;
1011 BDRVGlusterState *s = bs->opaque;
1013 acb.size = size;
1014 acb.ret = 0;
1015 acb.coroutine = qemu_coroutine_self();
1016 acb.aio_context = bdrv_get_aio_context(bs);
1018 ret = glfs_zerofill_async(s->fd, offset, size, gluster_finish_aiocb, &acb);
1019 if (ret < 0) {
1020 return -errno;
1023 qemu_coroutine_yield();
1024 return acb.ret;
1026 #endif
1028 static int qemu_gluster_do_truncate(struct glfs_fd *fd, int64_t offset,
1029 PreallocMode prealloc, Error **errp)
1031 int64_t current_length;
1033 current_length = glfs_lseek(fd, 0, SEEK_END);
1034 if (current_length < 0) {
1035 error_setg_errno(errp, errno, "Failed to determine current size");
1036 return -errno;
1039 if (current_length > offset && prealloc != PREALLOC_MODE_OFF) {
1040 error_setg(errp, "Cannot use preallocation for shrinking files");
1041 return -ENOTSUP;
1044 if (current_length == offset) {
1045 return 0;
1048 switch (prealloc) {
1049 #ifdef CONFIG_GLUSTERFS_FALLOCATE
1050 case PREALLOC_MODE_FALLOC:
1051 if (glfs_fallocate(fd, 0, current_length, offset - current_length)) {
1052 error_setg_errno(errp, errno, "Could not preallocate data");
1053 return -errno;
1055 break;
1056 #endif /* CONFIG_GLUSTERFS_FALLOCATE */
1057 #ifdef CONFIG_GLUSTERFS_ZEROFILL
1058 case PREALLOC_MODE_FULL:
1059 if (glfs_ftruncate(fd, offset)) {
1060 error_setg_errno(errp, errno, "Could not resize file");
1061 return -errno;
1063 if (glfs_zerofill(fd, current_length, offset - current_length)) {
1064 error_setg_errno(errp, errno, "Could not zerofill the new area");
1065 return -errno;
1067 break;
1068 #endif /* CONFIG_GLUSTERFS_ZEROFILL */
1069 case PREALLOC_MODE_OFF:
1070 if (glfs_ftruncate(fd, offset)) {
1071 error_setg_errno(errp, errno, "Could not resize file");
1072 return -errno;
1074 break;
1075 default:
1076 error_setg(errp, "Unsupported preallocation mode: %s",
1077 PreallocMode_str(prealloc));
1078 return -EINVAL;
1081 return 0;
1084 static int qemu_gluster_co_create(BlockdevCreateOptions *options,
1085 Error **errp)
1087 BlockdevCreateOptionsGluster *opts = &options->u.gluster;
1088 struct glfs *glfs;
1089 struct glfs_fd *fd = NULL;
1090 int ret = 0;
1092 assert(options->driver == BLOCKDEV_DRIVER_GLUSTER);
1094 glfs = qemu_gluster_glfs_init(opts->location, errp);
1095 if (!glfs) {
1096 ret = -errno;
1097 goto out;
1100 fd = glfs_creat(glfs, opts->location->path,
1101 O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, S_IRUSR | S_IWUSR);
1102 if (!fd) {
1103 ret = -errno;
1104 goto out;
1107 ret = qemu_gluster_do_truncate(fd, opts->size, opts->preallocation, errp);
1109 out:
1110 if (fd) {
1111 if (glfs_close(fd) != 0 && ret == 0) {
1112 ret = -errno;
1115 glfs_clear_preopened(glfs);
1116 return ret;
1119 static int coroutine_fn qemu_gluster_co_create_opts(BlockDriver *drv,
1120 const char *filename,
1121 QemuOpts *opts,
1122 Error **errp)
1124 BlockdevCreateOptions *options;
1125 BlockdevCreateOptionsGluster *gopts;
1126 BlockdevOptionsGluster *gconf;
1127 char *tmp = NULL;
1128 Error *local_err = NULL;
1129 int ret;
1131 options = g_new0(BlockdevCreateOptions, 1);
1132 options->driver = BLOCKDEV_DRIVER_GLUSTER;
1133 gopts = &options->u.gluster;
1135 gconf = g_new0(BlockdevOptionsGluster, 1);
1136 gopts->location = gconf;
1138 gopts->size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
1139 BDRV_SECTOR_SIZE);
1141 tmp = qemu_opt_get_del(opts, BLOCK_OPT_PREALLOC);
1142 gopts->preallocation = qapi_enum_parse(&PreallocMode_lookup, tmp,
1143 PREALLOC_MODE_OFF, &local_err);
1144 g_free(tmp);
1145 if (local_err) {
1146 error_propagate(errp, local_err);
1147 ret = -EINVAL;
1148 goto fail;
1151 gconf->debug = qemu_opt_get_number_del(opts, GLUSTER_OPT_DEBUG,
1152 GLUSTER_DEBUG_DEFAULT);
1153 if (gconf->debug < 0) {
1154 gconf->debug = 0;
1155 } else if (gconf->debug > GLUSTER_DEBUG_MAX) {
1156 gconf->debug = GLUSTER_DEBUG_MAX;
1158 gconf->has_debug = true;
1160 gconf->logfile = qemu_opt_get_del(opts, GLUSTER_OPT_LOGFILE);
1161 if (!gconf->logfile) {
1162 gconf->logfile = g_strdup(GLUSTER_LOGFILE_DEFAULT);
1164 gconf->has_logfile = true;
1166 ret = qemu_gluster_parse(gconf, filename, NULL, errp);
1167 if (ret < 0) {
1168 goto fail;
1171 ret = qemu_gluster_co_create(options, errp);
1172 if (ret < 0) {
1173 goto fail;
1176 ret = 0;
1177 fail:
1178 qapi_free_BlockdevCreateOptions(options);
1179 return ret;
1182 static coroutine_fn int qemu_gluster_co_rw(BlockDriverState *bs,
1183 int64_t sector_num, int nb_sectors,
1184 QEMUIOVector *qiov, int write)
1186 int ret;
1187 GlusterAIOCB acb;
1188 BDRVGlusterState *s = bs->opaque;
1189 size_t size = nb_sectors * BDRV_SECTOR_SIZE;
1190 off_t offset = sector_num * BDRV_SECTOR_SIZE;
1192 acb.size = size;
1193 acb.ret = 0;
1194 acb.coroutine = qemu_coroutine_self();
1195 acb.aio_context = bdrv_get_aio_context(bs);
1197 if (write) {
1198 ret = glfs_pwritev_async(s->fd, qiov->iov, qiov->niov, offset, 0,
1199 gluster_finish_aiocb, &acb);
1200 } else {
1201 ret = glfs_preadv_async(s->fd, qiov->iov, qiov->niov, offset, 0,
1202 gluster_finish_aiocb, &acb);
1205 if (ret < 0) {
1206 return -errno;
1209 qemu_coroutine_yield();
1210 return acb.ret;
1213 static coroutine_fn int qemu_gluster_co_truncate(BlockDriverState *bs,
1214 int64_t offset,
1215 bool exact,
1216 PreallocMode prealloc,
1217 BdrvRequestFlags flags,
1218 Error **errp)
1220 BDRVGlusterState *s = bs->opaque;
1221 return qemu_gluster_do_truncate(s->fd, offset, prealloc, errp);
1224 static coroutine_fn int qemu_gluster_co_readv(BlockDriverState *bs,
1225 int64_t sector_num,
1226 int nb_sectors,
1227 QEMUIOVector *qiov)
1229 return qemu_gluster_co_rw(bs, sector_num, nb_sectors, qiov, 0);
1232 static coroutine_fn int qemu_gluster_co_writev(BlockDriverState *bs,
1233 int64_t sector_num,
1234 int nb_sectors,
1235 QEMUIOVector *qiov,
1236 int flags)
1238 assert(!flags);
1239 return qemu_gluster_co_rw(bs, sector_num, nb_sectors, qiov, 1);
1242 static void qemu_gluster_close(BlockDriverState *bs)
1244 BDRVGlusterState *s = bs->opaque;
1246 g_free(s->logfile);
1247 if (s->fd) {
1248 glfs_close(s->fd);
1249 s->fd = NULL;
1251 glfs_clear_preopened(s->glfs);
1254 static coroutine_fn int qemu_gluster_co_flush_to_disk(BlockDriverState *bs)
1256 int ret;
1257 GlusterAIOCB acb;
1258 BDRVGlusterState *s = bs->opaque;
1260 acb.size = 0;
1261 acb.ret = 0;
1262 acb.coroutine = qemu_coroutine_self();
1263 acb.aio_context = bdrv_get_aio_context(bs);
1265 ret = glfs_fsync_async(s->fd, gluster_finish_aiocb, &acb);
1266 if (ret < 0) {
1267 ret = -errno;
1268 goto error;
1271 qemu_coroutine_yield();
1272 if (acb.ret < 0) {
1273 ret = acb.ret;
1274 goto error;
1277 return acb.ret;
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.
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.
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;
1298 #ifdef CONFIG_GLUSTERFS_DISCARD
1299 static coroutine_fn int qemu_gluster_co_pdiscard(BlockDriverState *bs,
1300 int64_t offset, int size)
1302 int ret;
1303 GlusterAIOCB acb;
1304 BDRVGlusterState *s = bs->opaque;
1306 acb.size = 0;
1307 acb.ret = 0;
1308 acb.coroutine = qemu_coroutine_self();
1309 acb.aio_context = bdrv_get_aio_context(bs);
1311 ret = glfs_discard_async(s->fd, offset, size, gluster_finish_aiocb, &acb);
1312 if (ret < 0) {
1313 return -errno;
1316 qemu_coroutine_yield();
1317 return acb.ret;
1319 #endif
1321 static int64_t qemu_gluster_getlength(BlockDriverState *bs)
1323 BDRVGlusterState *s = bs->opaque;
1324 int64_t ret;
1326 ret = glfs_lseek(s->fd, 0, SEEK_END);
1327 if (ret < 0) {
1328 return -errno;
1329 } else {
1330 return ret;
1334 static int64_t qemu_gluster_allocated_file_size(BlockDriverState *bs)
1336 BDRVGlusterState *s = bs->opaque;
1337 struct stat st;
1338 int ret;
1340 ret = glfs_fstat(s->fd, &st);
1341 if (ret < 0) {
1342 return -errno;
1343 } else {
1344 return st.st_blocks * 512;
1349 * Find allocation range in @bs around offset @start.
1350 * May change underlying file descriptor's file offset.
1351 * If @start is not in a hole, store @start in @data, and the
1352 * beginning of the next hole in @hole, and return 0.
1353 * If @start is in a non-trailing hole, store @start in @hole and the
1354 * beginning of the next non-hole in @data, and return 0.
1355 * If @start is in a trailing hole or beyond EOF, return -ENXIO.
1356 * If we can't find out, return a negative errno other than -ENXIO.
1358 * (Shamefully copied from file-posix.c, only minuscule adaptions.)
1360 static int find_allocation(BlockDriverState *bs, off_t start,
1361 off_t *data, off_t *hole)
1363 BDRVGlusterState *s = bs->opaque;
1365 if (!s->supports_seek_data) {
1366 goto exit;
1369 #if defined SEEK_HOLE && defined SEEK_DATA
1370 off_t offs;
1373 * SEEK_DATA cases:
1374 * D1. offs == start: start is in data
1375 * D2. offs > start: start is in a hole, next data at offs
1376 * D3. offs < 0, errno = ENXIO: either start is in a trailing hole
1377 * or start is beyond EOF
1378 * If the latter happens, the file has been truncated behind
1379 * our back since we opened it. All bets are off then.
1380 * Treating like a trailing hole is simplest.
1381 * D4. offs < 0, errno != ENXIO: we learned nothing
1383 offs = glfs_lseek(s->fd, start, SEEK_DATA);
1384 if (offs < 0) {
1385 return -errno; /* D3 or D4 */
1388 if (offs < start) {
1389 /* This is not a valid return by lseek(). We are safe to just return
1390 * -EIO in this case, and we'll treat it like D4. Unfortunately some
1391 * versions of gluster server will return offs < start, so an assert
1392 * here will unnecessarily abort QEMU. */
1393 return -EIO;
1396 if (offs > start) {
1397 /* D2: in hole, next data at offs */
1398 *hole = start;
1399 *data = offs;
1400 return 0;
1403 /* D1: in data, end not yet known */
1406 * SEEK_HOLE cases:
1407 * H1. offs == start: start is in a hole
1408 * If this happens here, a hole has been dug behind our back
1409 * since the previous lseek().
1410 * H2. offs > start: either start is in data, next hole at offs,
1411 * or start is in trailing hole, EOF at offs
1412 * Linux treats trailing holes like any other hole: offs ==
1413 * start. Solaris seeks to EOF instead: offs > start (blech).
1414 * If that happens here, a hole has been dug behind our back
1415 * since the previous lseek().
1416 * H3. offs < 0, errno = ENXIO: start is beyond EOF
1417 * If this happens, the file has been truncated behind our
1418 * back since we opened it. Treat it like a trailing hole.
1419 * H4. offs < 0, errno != ENXIO: we learned nothing
1420 * Pretend we know nothing at all, i.e. "forget" about D1.
1422 offs = glfs_lseek(s->fd, start, SEEK_HOLE);
1423 if (offs < 0) {
1424 return -errno; /* D1 and (H3 or H4) */
1427 if (offs < start) {
1428 /* This is not a valid return by lseek(). We are safe to just return
1429 * -EIO in this case, and we'll treat it like H4. Unfortunately some
1430 * versions of gluster server will return offs < start, so an assert
1431 * here will unnecessarily abort QEMU. */
1432 return -EIO;
1435 if (offs > start) {
1437 * D1 and H2: either in data, next hole at offs, or it was in
1438 * data but is now in a trailing hole. In the latter case,
1439 * all bets are off. Treating it as if it there was data all
1440 * the way to EOF is safe, so simply do that.
1442 *data = start;
1443 *hole = offs;
1444 return 0;
1447 /* D1 and H1 */
1448 return -EBUSY;
1449 #endif
1451 exit:
1452 return -ENOTSUP;
1456 * Returns the allocation status of the specified offset.
1458 * The block layer guarantees 'offset' and 'bytes' are within bounds.
1460 * 'pnum' is set to the number of bytes (including and immediately following
1461 * the specified offset) that are known to be in the same
1462 * allocated/unallocated state.
1464 * 'bytes' is the max value 'pnum' should be set to.
1466 * (Based on raw_co_block_status() from file-posix.c.)
1468 static int coroutine_fn qemu_gluster_co_block_status(BlockDriverState *bs,
1469 bool want_zero,
1470 int64_t offset,
1471 int64_t bytes,
1472 int64_t *pnum,
1473 int64_t *map,
1474 BlockDriverState **file)
1476 BDRVGlusterState *s = bs->opaque;
1477 off_t data = 0, hole = 0;
1478 int ret = -EINVAL;
1480 if (!s->fd) {
1481 return ret;
1484 if (!want_zero) {
1485 *pnum = bytes;
1486 *map = offset;
1487 *file = bs;
1488 return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID;
1491 ret = find_allocation(bs, offset, &data, &hole);
1492 if (ret == -ENXIO) {
1493 /* Trailing hole */
1494 *pnum = bytes;
1495 ret = BDRV_BLOCK_ZERO;
1496 } else if (ret < 0) {
1497 /* No info available, so pretend there are no holes */
1498 *pnum = bytes;
1499 ret = BDRV_BLOCK_DATA;
1500 } else if (data == offset) {
1501 /* On a data extent, compute bytes to the end of the extent,
1502 * possibly including a partial sector at EOF. */
1503 *pnum = MIN(bytes, hole - offset);
1504 ret = BDRV_BLOCK_DATA;
1505 } else {
1506 /* On a hole, compute bytes to the beginning of the next extent. */
1507 assert(hole == offset);
1508 *pnum = MIN(bytes, data - offset);
1509 ret = BDRV_BLOCK_ZERO;
1512 *map = offset;
1513 *file = bs;
1515 return ret | BDRV_BLOCK_OFFSET_VALID;
1519 static const char *const gluster_strong_open_opts[] = {
1520 GLUSTER_OPT_VOLUME,
1521 GLUSTER_OPT_PATH,
1522 GLUSTER_OPT_TYPE,
1523 GLUSTER_OPT_SERVER_PATTERN,
1524 GLUSTER_OPT_HOST,
1525 GLUSTER_OPT_PORT,
1526 GLUSTER_OPT_TO,
1527 GLUSTER_OPT_IPV4,
1528 GLUSTER_OPT_IPV6,
1529 GLUSTER_OPT_SOCKET,
1531 NULL
1534 static BlockDriver bdrv_gluster = {
1535 .format_name = "gluster",
1536 .protocol_name = "gluster",
1537 .instance_size = sizeof(BDRVGlusterState),
1538 .bdrv_needs_filename = false,
1539 .bdrv_file_open = qemu_gluster_open,
1540 .bdrv_reopen_prepare = qemu_gluster_reopen_prepare,
1541 .bdrv_reopen_commit = qemu_gluster_reopen_commit,
1542 .bdrv_reopen_abort = qemu_gluster_reopen_abort,
1543 .bdrv_close = qemu_gluster_close,
1544 .bdrv_co_create = qemu_gluster_co_create,
1545 .bdrv_co_create_opts = qemu_gluster_co_create_opts,
1546 .bdrv_getlength = qemu_gluster_getlength,
1547 .bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size,
1548 .bdrv_co_truncate = qemu_gluster_co_truncate,
1549 .bdrv_co_readv = qemu_gluster_co_readv,
1550 .bdrv_co_writev = qemu_gluster_co_writev,
1551 .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk,
1552 #ifdef CONFIG_GLUSTERFS_DISCARD
1553 .bdrv_co_pdiscard = qemu_gluster_co_pdiscard,
1554 #endif
1555 #ifdef CONFIG_GLUSTERFS_ZEROFILL
1556 .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
1557 #endif
1558 .bdrv_co_block_status = qemu_gluster_co_block_status,
1559 .bdrv_refresh_limits = qemu_gluster_refresh_limits,
1560 .create_opts = &qemu_gluster_create_opts,
1561 .strong_runtime_opts = gluster_strong_open_opts,
1564 static BlockDriver bdrv_gluster_tcp = {
1565 .format_name = "gluster",
1566 .protocol_name = "gluster+tcp",
1567 .instance_size = sizeof(BDRVGlusterState),
1568 .bdrv_needs_filename = false,
1569 .bdrv_file_open = qemu_gluster_open,
1570 .bdrv_reopen_prepare = qemu_gluster_reopen_prepare,
1571 .bdrv_reopen_commit = qemu_gluster_reopen_commit,
1572 .bdrv_reopen_abort = qemu_gluster_reopen_abort,
1573 .bdrv_close = qemu_gluster_close,
1574 .bdrv_co_create = qemu_gluster_co_create,
1575 .bdrv_co_create_opts = qemu_gluster_co_create_opts,
1576 .bdrv_getlength = qemu_gluster_getlength,
1577 .bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size,
1578 .bdrv_co_truncate = qemu_gluster_co_truncate,
1579 .bdrv_co_readv = qemu_gluster_co_readv,
1580 .bdrv_co_writev = qemu_gluster_co_writev,
1581 .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk,
1582 #ifdef CONFIG_GLUSTERFS_DISCARD
1583 .bdrv_co_pdiscard = qemu_gluster_co_pdiscard,
1584 #endif
1585 #ifdef CONFIG_GLUSTERFS_ZEROFILL
1586 .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
1587 #endif
1588 .bdrv_co_block_status = qemu_gluster_co_block_status,
1589 .bdrv_refresh_limits = qemu_gluster_refresh_limits,
1590 .create_opts = &qemu_gluster_create_opts,
1591 .strong_runtime_opts = gluster_strong_open_opts,
1594 static BlockDriver bdrv_gluster_unix = {
1595 .format_name = "gluster",
1596 .protocol_name = "gluster+unix",
1597 .instance_size = sizeof(BDRVGlusterState),
1598 .bdrv_needs_filename = true,
1599 .bdrv_file_open = qemu_gluster_open,
1600 .bdrv_reopen_prepare = qemu_gluster_reopen_prepare,
1601 .bdrv_reopen_commit = qemu_gluster_reopen_commit,
1602 .bdrv_reopen_abort = qemu_gluster_reopen_abort,
1603 .bdrv_close = qemu_gluster_close,
1604 .bdrv_co_create = qemu_gluster_co_create,
1605 .bdrv_co_create_opts = qemu_gluster_co_create_opts,
1606 .bdrv_getlength = qemu_gluster_getlength,
1607 .bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size,
1608 .bdrv_co_truncate = qemu_gluster_co_truncate,
1609 .bdrv_co_readv = qemu_gluster_co_readv,
1610 .bdrv_co_writev = qemu_gluster_co_writev,
1611 .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk,
1612 #ifdef CONFIG_GLUSTERFS_DISCARD
1613 .bdrv_co_pdiscard = qemu_gluster_co_pdiscard,
1614 #endif
1615 #ifdef CONFIG_GLUSTERFS_ZEROFILL
1616 .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
1617 #endif
1618 .bdrv_co_block_status = qemu_gluster_co_block_status,
1619 .bdrv_refresh_limits = qemu_gluster_refresh_limits,
1620 .create_opts = &qemu_gluster_create_opts,
1621 .strong_runtime_opts = gluster_strong_open_opts,
1624 /* rdma is deprecated (actually never supported for volfile fetch).
1625 * Let's maintain it for the protocol compatibility, to make sure things
1626 * won't break immediately. For now, gluster+rdma will fall back to gluster+tcp
1627 * protocol with a warning.
1628 * TODO: remove gluster+rdma interface support
1630 static BlockDriver bdrv_gluster_rdma = {
1631 .format_name = "gluster",
1632 .protocol_name = "gluster+rdma",
1633 .instance_size = sizeof(BDRVGlusterState),
1634 .bdrv_needs_filename = true,
1635 .bdrv_file_open = qemu_gluster_open,
1636 .bdrv_reopen_prepare = qemu_gluster_reopen_prepare,
1637 .bdrv_reopen_commit = qemu_gluster_reopen_commit,
1638 .bdrv_reopen_abort = qemu_gluster_reopen_abort,
1639 .bdrv_close = qemu_gluster_close,
1640 .bdrv_co_create = qemu_gluster_co_create,
1641 .bdrv_co_create_opts = qemu_gluster_co_create_opts,
1642 .bdrv_getlength = qemu_gluster_getlength,
1643 .bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size,
1644 .bdrv_co_truncate = qemu_gluster_co_truncate,
1645 .bdrv_co_readv = qemu_gluster_co_readv,
1646 .bdrv_co_writev = qemu_gluster_co_writev,
1647 .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk,
1648 #ifdef CONFIG_GLUSTERFS_DISCARD
1649 .bdrv_co_pdiscard = qemu_gluster_co_pdiscard,
1650 #endif
1651 #ifdef CONFIG_GLUSTERFS_ZEROFILL
1652 .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
1653 #endif
1654 .bdrv_co_block_status = qemu_gluster_co_block_status,
1655 .bdrv_refresh_limits = qemu_gluster_refresh_limits,
1656 .create_opts = &qemu_gluster_create_opts,
1657 .strong_runtime_opts = gluster_strong_open_opts,
1660 static void bdrv_gluster_init(void)
1662 bdrv_register(&bdrv_gluster_rdma);
1663 bdrv_register(&bdrv_gluster_unix);
1664 bdrv_register(&bdrv_gluster_tcp);
1665 bdrv_register(&bdrv_gluster);
1668 block_init(bdrv_gluster_init);