s390x: fix realize inheritance for kvm-flic
[qemu/ar7.git] / block / gluster.c
blobaddceed6eb3e0bcca7c3e7c0c481632a36a78072
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 */
10 #include "qemu/osdep.h"
11 #include <glusterfs/api/glfs.h>
12 #include "block/block_int.h"
13 #include "qapi/error.h"
14 #include "qapi/qmp/qerror.h"
15 #include "qapi/util.h"
16 #include "qemu/uri.h"
17 #include "qemu/error-report.h"
18 #include "qemu/cutils.h"
20 #define GLUSTER_OPT_FILENAME "filename"
21 #define GLUSTER_OPT_VOLUME "volume"
22 #define GLUSTER_OPT_PATH "path"
23 #define GLUSTER_OPT_TYPE "type"
24 #define GLUSTER_OPT_SERVER_PATTERN "server."
25 #define GLUSTER_OPT_HOST "host"
26 #define GLUSTER_OPT_PORT "port"
27 #define GLUSTER_OPT_TO "to"
28 #define GLUSTER_OPT_IPV4 "ipv4"
29 #define GLUSTER_OPT_IPV6 "ipv6"
30 #define GLUSTER_OPT_SOCKET "socket"
31 #define GLUSTER_OPT_DEBUG "debug"
32 #define GLUSTER_DEFAULT_PORT 24007
33 #define GLUSTER_DEBUG_DEFAULT 4
34 #define GLUSTER_DEBUG_MAX 9
35 #define GLUSTER_OPT_LOGFILE "logfile"
36 #define GLUSTER_LOGFILE_DEFAULT "-" /* handled in libgfapi as /dev/stderr */
38 #define GERR_INDEX_HINT "hint: check in 'server' array index '%d'\n"
40 typedef struct GlusterAIOCB {
41 int64_t size;
42 int ret;
43 Coroutine *coroutine;
44 AioContext *aio_context;
45 } GlusterAIOCB;
47 typedef struct BDRVGlusterState {
48 struct glfs *glfs;
49 struct glfs_fd *fd;
50 char *logfile;
51 bool supports_seek_data;
52 int debug;
53 } BDRVGlusterState;
55 typedef struct BDRVGlusterReopenState {
56 struct glfs *glfs;
57 struct glfs_fd *fd;
58 } BDRVGlusterReopenState;
61 typedef struct GlfsPreopened {
62 char *volume;
63 glfs_t *fs;
64 int ref;
65 } GlfsPreopened;
67 typedef struct ListElement {
68 QLIST_ENTRY(ListElement) list;
69 GlfsPreopened saved;
70 } ListElement;
72 static QLIST_HEAD(glfs_list, ListElement) glfs_list;
74 static QemuOptsList qemu_gluster_create_opts = {
75 .name = "qemu-gluster-create-opts",
76 .head = QTAILQ_HEAD_INITIALIZER(qemu_gluster_create_opts.head),
77 .desc = {
79 .name = BLOCK_OPT_SIZE,
80 .type = QEMU_OPT_SIZE,
81 .help = "Virtual disk size"
84 .name = BLOCK_OPT_PREALLOC,
85 .type = QEMU_OPT_STRING,
86 .help = "Preallocation mode (allowed values: off, full)"
89 .name = GLUSTER_OPT_DEBUG,
90 .type = QEMU_OPT_NUMBER,
91 .help = "Gluster log level, valid range is 0-9",
94 .name = GLUSTER_OPT_LOGFILE,
95 .type = QEMU_OPT_STRING,
96 .help = "Logfile path of libgfapi",
98 { /* end of list */ }
102 static QemuOptsList runtime_opts = {
103 .name = "gluster",
104 .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head),
105 .desc = {
107 .name = GLUSTER_OPT_FILENAME,
108 .type = QEMU_OPT_STRING,
109 .help = "URL to the gluster image",
112 .name = GLUSTER_OPT_DEBUG,
113 .type = QEMU_OPT_NUMBER,
114 .help = "Gluster log level, valid range is 0-9",
117 .name = GLUSTER_OPT_LOGFILE,
118 .type = QEMU_OPT_STRING,
119 .help = "Logfile path of libgfapi",
121 { /* end of list */ }
125 static QemuOptsList runtime_json_opts = {
126 .name = "gluster_json",
127 .head = QTAILQ_HEAD_INITIALIZER(runtime_json_opts.head),
128 .desc = {
130 .name = GLUSTER_OPT_VOLUME,
131 .type = QEMU_OPT_STRING,
132 .help = "name of gluster volume where VM image resides",
135 .name = GLUSTER_OPT_PATH,
136 .type = QEMU_OPT_STRING,
137 .help = "absolute path to image file in gluster volume",
140 .name = GLUSTER_OPT_DEBUG,
141 .type = QEMU_OPT_NUMBER,
142 .help = "Gluster log level, valid range is 0-9",
144 { /* end of list */ }
148 static QemuOptsList runtime_type_opts = {
149 .name = "gluster_type",
150 .head = QTAILQ_HEAD_INITIALIZER(runtime_type_opts.head),
151 .desc = {
153 .name = GLUSTER_OPT_TYPE,
154 .type = QEMU_OPT_STRING,
155 .help = "inet|unix",
157 { /* end of list */ }
161 static QemuOptsList runtime_unix_opts = {
162 .name = "gluster_unix",
163 .head = QTAILQ_HEAD_INITIALIZER(runtime_unix_opts.head),
164 .desc = {
166 .name = GLUSTER_OPT_SOCKET,
167 .type = QEMU_OPT_STRING,
168 .help = "socket file path)",
170 { /* end of list */ }
174 static QemuOptsList runtime_inet_opts = {
175 .name = "gluster_inet",
176 .head = QTAILQ_HEAD_INITIALIZER(runtime_inet_opts.head),
177 .desc = {
179 .name = GLUSTER_OPT_TYPE,
180 .type = QEMU_OPT_STRING,
181 .help = "inet|unix",
184 .name = GLUSTER_OPT_HOST,
185 .type = QEMU_OPT_STRING,
186 .help = "host address (hostname/ipv4/ipv6 addresses)",
189 .name = GLUSTER_OPT_PORT,
190 .type = QEMU_OPT_STRING,
191 .help = "port number on which glusterd is listening (default 24007)",
194 .name = "to",
195 .type = QEMU_OPT_NUMBER,
196 .help = "max port number, not supported by gluster",
199 .name = "ipv4",
200 .type = QEMU_OPT_BOOL,
201 .help = "ipv4 bool value, not supported by gluster",
204 .name = "ipv6",
205 .type = QEMU_OPT_BOOL,
206 .help = "ipv6 bool value, not supported by gluster",
208 { /* end of list */ }
212 static void glfs_set_preopened(const char *volume, glfs_t *fs)
214 ListElement *entry = NULL;
216 entry = g_new(ListElement, 1);
218 entry->saved.volume = g_strdup(volume);
220 entry->saved.fs = fs;
221 entry->saved.ref = 1;
223 QLIST_INSERT_HEAD(&glfs_list, entry, list);
226 static glfs_t *glfs_find_preopened(const char *volume)
228 ListElement *entry = NULL;
230 QLIST_FOREACH(entry, &glfs_list, list) {
231 if (strcmp(entry->saved.volume, volume) == 0) {
232 entry->saved.ref++;
233 return entry->saved.fs;
237 return NULL;
240 static void glfs_clear_preopened(glfs_t *fs)
242 ListElement *entry = NULL;
243 ListElement *next;
245 if (fs == NULL) {
246 return;
249 QLIST_FOREACH_SAFE(entry, &glfs_list, list, next) {
250 if (entry->saved.fs == fs) {
251 if (--entry->saved.ref) {
252 return;
255 QLIST_REMOVE(entry, list);
257 glfs_fini(entry->saved.fs);
258 g_free(entry->saved.volume);
259 g_free(entry);
264 static int parse_volume_options(BlockdevOptionsGluster *gconf, char *path)
266 char *p, *q;
268 if (!path) {
269 return -EINVAL;
272 /* volume */
273 p = q = path + strspn(path, "/");
274 p += strcspn(p, "/");
275 if (*p == '\0') {
276 return -EINVAL;
278 gconf->volume = g_strndup(q, p - q);
280 /* path */
281 p += strspn(p, "/");
282 if (*p == '\0') {
283 return -EINVAL;
285 gconf->path = g_strdup(p);
286 return 0;
290 * file=gluster[+transport]://[host[:port]]/volume/path[?socket=...]
292 * 'gluster' is the protocol.
294 * 'transport' specifies the transport type used to connect to gluster
295 * management daemon (glusterd). Valid transport types are
296 * tcp or unix. If a transport type isn't specified, then tcp type is assumed.
298 * 'host' specifies the host where the volume file specification for
299 * the given volume resides. This can be either hostname or ipv4 address.
300 * If transport type is 'unix', then 'host' field should not be specified.
301 * The 'socket' field needs to be populated with the path to unix domain
302 * socket.
304 * 'port' is the port number on which glusterd is listening. This is optional
305 * and if not specified, QEMU will send 0 which will make gluster to use the
306 * default port. If the transport type is unix, then 'port' should not be
307 * specified.
309 * 'volume' is the name of the gluster volume which contains the VM image.
311 * 'path' is the path to the actual VM image that resides on gluster volume.
313 * Examples:
315 * file=gluster://1.2.3.4/testvol/a.img
316 * file=gluster+tcp://1.2.3.4/testvol/a.img
317 * file=gluster+tcp://1.2.3.4:24007/testvol/dir/a.img
318 * file=gluster+tcp://host.domain.com:24007/testvol/dir/a.img
319 * file=gluster+unix:///testvol/dir/a.img?socket=/tmp/glusterd.socket
321 static int qemu_gluster_parse_uri(BlockdevOptionsGluster *gconf,
322 const char *filename)
324 SocketAddress *gsconf;
325 URI *uri;
326 QueryParams *qp = NULL;
327 bool is_unix = false;
328 int ret = 0;
330 uri = uri_parse(filename);
331 if (!uri) {
332 return -EINVAL;
335 gconf->server = g_new0(SocketAddressList, 1);
336 gconf->server->value = gsconf = g_new0(SocketAddress, 1);
338 /* transport */
339 if (!uri->scheme || !strcmp(uri->scheme, "gluster")) {
340 gsconf->type = SOCKET_ADDRESS_TYPE_INET;
341 } else if (!strcmp(uri->scheme, "gluster+tcp")) {
342 gsconf->type = SOCKET_ADDRESS_TYPE_INET;
343 } else if (!strcmp(uri->scheme, "gluster+unix")) {
344 gsconf->type = SOCKET_ADDRESS_TYPE_UNIX;
345 is_unix = true;
346 } else if (!strcmp(uri->scheme, "gluster+rdma")) {
347 gsconf->type = SOCKET_ADDRESS_TYPE_INET;
348 error_report("Warning: rdma feature is not supported, falling "
349 "back to tcp");
350 } else {
351 ret = -EINVAL;
352 goto out;
355 ret = parse_volume_options(gconf, uri->path);
356 if (ret < 0) {
357 goto out;
360 qp = query_params_parse(uri->query);
361 if (qp->n > 1 || (is_unix && !qp->n) || (!is_unix && qp->n)) {
362 ret = -EINVAL;
363 goto out;
366 if (is_unix) {
367 if (uri->server || uri->port) {
368 ret = -EINVAL;
369 goto out;
371 if (strcmp(qp->p[0].name, "socket")) {
372 ret = -EINVAL;
373 goto out;
375 gsconf->u.q_unix.path = g_strdup(qp->p[0].value);
376 } else {
377 gsconf->u.inet.host = g_strdup(uri->server ? uri->server : "localhost");
378 if (uri->port) {
379 gsconf->u.inet.port = g_strdup_printf("%d", uri->port);
380 } else {
381 gsconf->u.inet.port = g_strdup_printf("%d", GLUSTER_DEFAULT_PORT);
385 out:
386 if (qp) {
387 query_params_free(qp);
389 uri_free(uri);
390 return ret;
393 static struct glfs *qemu_gluster_glfs_init(BlockdevOptionsGluster *gconf,
394 Error **errp)
396 struct glfs *glfs;
397 int ret;
398 int old_errno;
399 SocketAddressList *server;
400 unsigned long long port;
402 glfs = glfs_find_preopened(gconf->volume);
403 if (glfs) {
404 return glfs;
407 glfs = glfs_new(gconf->volume);
408 if (!glfs) {
409 goto out;
412 glfs_set_preopened(gconf->volume, glfs);
414 for (server = gconf->server; server; server = server->next) {
415 switch (server->value->type) {
416 case SOCKET_ADDRESS_TYPE_UNIX:
417 ret = glfs_set_volfile_server(glfs, "unix",
418 server->value->u.q_unix.path, 0);
419 break;
420 case SOCKET_ADDRESS_TYPE_INET:
421 if (parse_uint_full(server->value->u.inet.port, &port, 10) < 0 ||
422 port > 65535) {
423 error_setg(errp, "'%s' is not a valid port number",
424 server->value->u.inet.port);
425 errno = EINVAL;
426 goto out;
428 ret = glfs_set_volfile_server(glfs, "tcp",
429 server->value->u.inet.host,
430 (int)port);
431 break;
432 case SOCKET_ADDRESS_TYPE_VSOCK:
433 case SOCKET_ADDRESS_TYPE_FD:
434 default:
435 abort();
438 if (ret < 0) {
439 goto out;
443 ret = glfs_set_logging(glfs, gconf->logfile, gconf->debug);
444 if (ret < 0) {
445 goto out;
448 ret = glfs_init(glfs);
449 if (ret) {
450 error_setg(errp, "Gluster connection for volume %s, path %s failed"
451 " to connect", gconf->volume, gconf->path);
452 for (server = gconf->server; server; server = server->next) {
453 if (server->value->type == SOCKET_ADDRESS_TYPE_UNIX) {
454 error_append_hint(errp, "hint: failed on socket %s ",
455 server->value->u.q_unix.path);
456 } else {
457 error_append_hint(errp, "hint: failed on host %s and port %s ",
458 server->value->u.inet.host,
459 server->value->u.inet.port);
463 error_append_hint(errp, "Please refer to gluster logs for more info\n");
465 /* glfs_init sometimes doesn't set errno although docs suggest that */
466 if (errno == 0) {
467 errno = EINVAL;
470 goto out;
472 return glfs;
474 out:
475 if (glfs) {
476 old_errno = errno;
477 glfs_clear_preopened(glfs);
478 errno = old_errno;
480 return NULL;
484 * Convert the json formatted command line into qapi.
486 static int qemu_gluster_parse_json(BlockdevOptionsGluster *gconf,
487 QDict *options, Error **errp)
489 QemuOpts *opts;
490 SocketAddress *gsconf = NULL;
491 SocketAddressList *curr = NULL;
492 QDict *backing_options = NULL;
493 Error *local_err = NULL;
494 char *str = NULL;
495 const char *ptr;
496 int i, type, num_servers;
498 /* create opts info from runtime_json_opts list */
499 opts = qemu_opts_create(&runtime_json_opts, NULL, 0, &error_abort);
500 qemu_opts_absorb_qdict(opts, options, &local_err);
501 if (local_err) {
502 goto out;
505 num_servers = qdict_array_entries(options, GLUSTER_OPT_SERVER_PATTERN);
506 if (num_servers < 1) {
507 error_setg(&local_err, QERR_MISSING_PARAMETER, "server");
508 goto out;
511 ptr = qemu_opt_get(opts, GLUSTER_OPT_VOLUME);
512 if (!ptr) {
513 error_setg(&local_err, QERR_MISSING_PARAMETER, GLUSTER_OPT_VOLUME);
514 goto out;
516 gconf->volume = g_strdup(ptr);
518 ptr = qemu_opt_get(opts, GLUSTER_OPT_PATH);
519 if (!ptr) {
520 error_setg(&local_err, QERR_MISSING_PARAMETER, GLUSTER_OPT_PATH);
521 goto out;
523 gconf->path = g_strdup(ptr);
524 qemu_opts_del(opts);
526 for (i = 0; i < num_servers; i++) {
527 str = g_strdup_printf(GLUSTER_OPT_SERVER_PATTERN"%d.", i);
528 qdict_extract_subqdict(options, &backing_options, str);
530 /* create opts info from runtime_type_opts list */
531 opts = qemu_opts_create(&runtime_type_opts, NULL, 0, &error_abort);
532 qemu_opts_absorb_qdict(opts, backing_options, &local_err);
533 if (local_err) {
534 goto out;
537 ptr = qemu_opt_get(opts, GLUSTER_OPT_TYPE);
538 if (!ptr) {
539 error_setg(&local_err, QERR_MISSING_PARAMETER, GLUSTER_OPT_TYPE);
540 error_append_hint(&local_err, GERR_INDEX_HINT, i);
541 goto out;
544 gsconf = g_new0(SocketAddress, 1);
545 if (!strcmp(ptr, "tcp")) {
546 ptr = "inet"; /* accept legacy "tcp" */
548 type = qapi_enum_parse(SocketAddressType_lookup, ptr,
549 SOCKET_ADDRESS_TYPE__MAX, -1, NULL);
550 if (type != SOCKET_ADDRESS_TYPE_INET
551 && type != SOCKET_ADDRESS_TYPE_UNIX) {
552 error_setg(&local_err,
553 "Parameter '%s' may be 'inet' or 'unix'",
554 GLUSTER_OPT_TYPE);
555 error_append_hint(&local_err, GERR_INDEX_HINT, i);
556 goto out;
558 gsconf->type = type;
559 qemu_opts_del(opts);
561 if (gsconf->type == SOCKET_ADDRESS_TYPE_INET) {
562 /* create opts info from runtime_inet_opts list */
563 opts = qemu_opts_create(&runtime_inet_opts, NULL, 0, &error_abort);
564 qemu_opts_absorb_qdict(opts, backing_options, &local_err);
565 if (local_err) {
566 goto out;
569 ptr = qemu_opt_get(opts, GLUSTER_OPT_HOST);
570 if (!ptr) {
571 error_setg(&local_err, QERR_MISSING_PARAMETER,
572 GLUSTER_OPT_HOST);
573 error_append_hint(&local_err, GERR_INDEX_HINT, i);
574 goto out;
576 gsconf->u.inet.host = g_strdup(ptr);
577 ptr = qemu_opt_get(opts, GLUSTER_OPT_PORT);
578 if (!ptr) {
579 error_setg(&local_err, QERR_MISSING_PARAMETER,
580 GLUSTER_OPT_PORT);
581 error_append_hint(&local_err, GERR_INDEX_HINT, i);
582 goto out;
584 gsconf->u.inet.port = g_strdup(ptr);
586 /* defend for unsupported fields in InetSocketAddress,
587 * i.e. @ipv4, @ipv6 and @to
589 ptr = qemu_opt_get(opts, GLUSTER_OPT_TO);
590 if (ptr) {
591 gsconf->u.inet.has_to = true;
593 ptr = qemu_opt_get(opts, GLUSTER_OPT_IPV4);
594 if (ptr) {
595 gsconf->u.inet.has_ipv4 = true;
597 ptr = qemu_opt_get(opts, GLUSTER_OPT_IPV6);
598 if (ptr) {
599 gsconf->u.inet.has_ipv6 = true;
601 if (gsconf->u.inet.has_to) {
602 error_setg(&local_err, "Parameter 'to' not supported");
603 goto out;
605 if (gsconf->u.inet.has_ipv4 || gsconf->u.inet.has_ipv6) {
606 error_setg(&local_err, "Parameters 'ipv4/ipv6' not supported");
607 goto out;
609 qemu_opts_del(opts);
610 } else {
611 /* create opts info from runtime_unix_opts list */
612 opts = qemu_opts_create(&runtime_unix_opts, NULL, 0, &error_abort);
613 qemu_opts_absorb_qdict(opts, backing_options, &local_err);
614 if (local_err) {
615 goto out;
618 ptr = qemu_opt_get(opts, GLUSTER_OPT_SOCKET);
619 if (!ptr) {
620 error_setg(&local_err, QERR_MISSING_PARAMETER,
621 GLUSTER_OPT_SOCKET);
622 error_append_hint(&local_err, GERR_INDEX_HINT, i);
623 goto out;
625 gsconf->u.q_unix.path = g_strdup(ptr);
626 qemu_opts_del(opts);
629 if (gconf->server == NULL) {
630 gconf->server = g_new0(SocketAddressList, 1);
631 gconf->server->value = gsconf;
632 curr = gconf->server;
633 } else {
634 curr->next = g_new0(SocketAddressList, 1);
635 curr->next->value = gsconf;
636 curr = curr->next;
638 gsconf = NULL;
640 QDECREF(backing_options);
641 backing_options = NULL;
642 g_free(str);
643 str = NULL;
646 return 0;
648 out:
649 error_propagate(errp, local_err);
650 qapi_free_SocketAddress(gsconf);
651 qemu_opts_del(opts);
652 g_free(str);
653 QDECREF(backing_options);
654 errno = EINVAL;
655 return -errno;
658 static struct glfs *qemu_gluster_init(BlockdevOptionsGluster *gconf,
659 const char *filename,
660 QDict *options, Error **errp)
662 int ret;
663 if (filename) {
664 ret = qemu_gluster_parse_uri(gconf, filename);
665 if (ret < 0) {
666 error_setg(errp, "invalid URI");
667 error_append_hint(errp, "Usage: file=gluster[+transport]://"
668 "[host[:port]]volume/path[?socket=...]"
669 "[,file.debug=N]"
670 "[,file.logfile=/path/filename.log]\n");
671 errno = -ret;
672 return NULL;
674 } else {
675 ret = qemu_gluster_parse_json(gconf, options, errp);
676 if (ret < 0) {
677 error_append_hint(errp, "Usage: "
678 "-drive driver=qcow2,file.driver=gluster,"
679 "file.volume=testvol,file.path=/path/a.qcow2"
680 "[,file.debug=9]"
681 "[,file.logfile=/path/filename.log],"
682 "file.server.0.type=inet,"
683 "file.server.0.host=1.2.3.4,"
684 "file.server.0.port=24007,"
685 "file.server.1.transport=unix,"
686 "file.server.1.socket=/var/run/glusterd.socket ..."
687 "\n");
688 errno = -ret;
689 return NULL;
694 return qemu_gluster_glfs_init(gconf, errp);
698 * AIO callback routine called from GlusterFS thread.
700 static void gluster_finish_aiocb(struct glfs_fd *fd, ssize_t ret, void *arg)
702 GlusterAIOCB *acb = (GlusterAIOCB *)arg;
704 if (!ret || ret == acb->size) {
705 acb->ret = 0; /* Success */
706 } else if (ret < 0) {
707 acb->ret = -errno; /* Read/Write failed */
708 } else {
709 acb->ret = -EIO; /* Partial read/write - fail it */
712 aio_co_schedule(acb->aio_context, acb->coroutine);
715 static void qemu_gluster_parse_flags(int bdrv_flags, int *open_flags)
717 assert(open_flags != NULL);
719 *open_flags |= O_BINARY;
721 if (bdrv_flags & BDRV_O_RDWR) {
722 *open_flags |= O_RDWR;
723 } else {
724 *open_flags |= O_RDONLY;
727 if ((bdrv_flags & BDRV_O_NOCACHE)) {
728 *open_flags |= O_DIRECT;
733 * Do SEEK_DATA/HOLE to detect if it is functional. Older broken versions of
734 * gfapi incorrectly return the current offset when SEEK_DATA/HOLE is used.
735 * - Corrected versions return -1 and set errno to EINVAL.
736 * - Versions that support SEEK_DATA/HOLE correctly, will return -1 and set
737 * errno to ENXIO when SEEK_DATA is called with a position of EOF.
739 static bool qemu_gluster_test_seek(struct glfs_fd *fd)
741 off_t ret = 0;
743 #if defined SEEK_HOLE && defined SEEK_DATA
744 off_t eof;
746 eof = glfs_lseek(fd, 0, SEEK_END);
747 if (eof < 0) {
748 /* this should never occur */
749 return false;
752 /* this should always fail with ENXIO if SEEK_DATA is supported */
753 ret = glfs_lseek(fd, eof, SEEK_DATA);
754 #endif
756 return (ret < 0) && (errno == ENXIO);
759 static int qemu_gluster_open(BlockDriverState *bs, QDict *options,
760 int bdrv_flags, Error **errp)
762 BDRVGlusterState *s = bs->opaque;
763 int open_flags = 0;
764 int ret = 0;
765 BlockdevOptionsGluster *gconf = NULL;
766 QemuOpts *opts;
767 Error *local_err = NULL;
768 const char *filename, *logfile;
770 opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
771 qemu_opts_absorb_qdict(opts, options, &local_err);
772 if (local_err) {
773 error_propagate(errp, local_err);
774 ret = -EINVAL;
775 goto out;
778 filename = qemu_opt_get(opts, GLUSTER_OPT_FILENAME);
780 s->debug = qemu_opt_get_number(opts, GLUSTER_OPT_DEBUG,
781 GLUSTER_DEBUG_DEFAULT);
782 if (s->debug < 0) {
783 s->debug = 0;
784 } else if (s->debug > GLUSTER_DEBUG_MAX) {
785 s->debug = GLUSTER_DEBUG_MAX;
788 gconf = g_new0(BlockdevOptionsGluster, 1);
789 gconf->debug = s->debug;
790 gconf->has_debug = true;
792 logfile = qemu_opt_get(opts, GLUSTER_OPT_LOGFILE);
793 s->logfile = g_strdup(logfile ? logfile : GLUSTER_LOGFILE_DEFAULT);
795 gconf->logfile = g_strdup(s->logfile);
796 gconf->has_logfile = true;
798 s->glfs = qemu_gluster_init(gconf, filename, options, errp);
799 if (!s->glfs) {
800 ret = -errno;
801 goto out;
804 #ifdef CONFIG_GLUSTERFS_XLATOR_OPT
805 /* Without this, if fsync fails for a recoverable reason (for instance,
806 * ENOSPC), gluster will dump its cache, preventing retries. This means
807 * almost certain data loss. Not all gluster versions support the
808 * 'resync-failed-syncs-after-fsync' key value, but there is no way to
809 * discover during runtime if it is supported (this api returns success for
810 * unknown key/value pairs) */
811 ret = glfs_set_xlator_option(s->glfs, "*-write-behind",
812 "resync-failed-syncs-after-fsync",
813 "on");
814 if (ret < 0) {
815 error_setg_errno(errp, errno, "Unable to set xlator key/value pair");
816 ret = -errno;
817 goto out;
819 #endif
821 qemu_gluster_parse_flags(bdrv_flags, &open_flags);
823 s->fd = glfs_open(s->glfs, gconf->path, open_flags);
824 if (!s->fd) {
825 ret = -errno;
828 s->supports_seek_data = qemu_gluster_test_seek(s->fd);
830 out:
831 qemu_opts_del(opts);
832 qapi_free_BlockdevOptionsGluster(gconf);
833 if (!ret) {
834 return ret;
836 g_free(s->logfile);
837 if (s->fd) {
838 glfs_close(s->fd);
841 glfs_clear_preopened(s->glfs);
843 return ret;
846 static int qemu_gluster_reopen_prepare(BDRVReopenState *state,
847 BlockReopenQueue *queue, Error **errp)
849 int ret = 0;
850 BDRVGlusterState *s;
851 BDRVGlusterReopenState *reop_s;
852 BlockdevOptionsGluster *gconf;
853 int open_flags = 0;
855 assert(state != NULL);
856 assert(state->bs != NULL);
858 s = state->bs->opaque;
860 state->opaque = g_new0(BDRVGlusterReopenState, 1);
861 reop_s = state->opaque;
863 qemu_gluster_parse_flags(state->flags, &open_flags);
865 gconf = g_new0(BlockdevOptionsGluster, 1);
866 gconf->debug = s->debug;
867 gconf->has_debug = true;
868 gconf->logfile = g_strdup(s->logfile);
869 gconf->has_logfile = true;
870 reop_s->glfs = qemu_gluster_init(gconf, state->bs->filename, NULL, errp);
871 if (reop_s->glfs == NULL) {
872 ret = -errno;
873 goto exit;
876 #ifdef CONFIG_GLUSTERFS_XLATOR_OPT
877 ret = glfs_set_xlator_option(reop_s->glfs, "*-write-behind",
878 "resync-failed-syncs-after-fsync", "on");
879 if (ret < 0) {
880 error_setg_errno(errp, errno, "Unable to set xlator key/value pair");
881 ret = -errno;
882 goto exit;
884 #endif
886 reop_s->fd = glfs_open(reop_s->glfs, gconf->path, open_flags);
887 if (reop_s->fd == NULL) {
888 /* reops->glfs will be cleaned up in _abort */
889 ret = -errno;
890 goto exit;
893 exit:
894 /* state->opaque will be freed in either the _abort or _commit */
895 qapi_free_BlockdevOptionsGluster(gconf);
896 return ret;
899 static void qemu_gluster_reopen_commit(BDRVReopenState *state)
901 BDRVGlusterReopenState *reop_s = state->opaque;
902 BDRVGlusterState *s = state->bs->opaque;
905 /* close the old */
906 if (s->fd) {
907 glfs_close(s->fd);
910 glfs_clear_preopened(s->glfs);
912 /* use the newly opened image / connection */
913 s->fd = reop_s->fd;
914 s->glfs = reop_s->glfs;
916 g_free(state->opaque);
917 state->opaque = NULL;
919 return;
923 static void qemu_gluster_reopen_abort(BDRVReopenState *state)
925 BDRVGlusterReopenState *reop_s = state->opaque;
927 if (reop_s == NULL) {
928 return;
931 if (reop_s->fd) {
932 glfs_close(reop_s->fd);
935 glfs_clear_preopened(reop_s->glfs);
937 g_free(state->opaque);
938 state->opaque = NULL;
940 return;
943 #ifdef CONFIG_GLUSTERFS_ZEROFILL
944 static coroutine_fn int qemu_gluster_co_pwrite_zeroes(BlockDriverState *bs,
945 int64_t offset,
946 int size,
947 BdrvRequestFlags flags)
949 int ret;
950 GlusterAIOCB acb;
951 BDRVGlusterState *s = bs->opaque;
953 acb.size = size;
954 acb.ret = 0;
955 acb.coroutine = qemu_coroutine_self();
956 acb.aio_context = bdrv_get_aio_context(bs);
958 ret = glfs_zerofill_async(s->fd, offset, size, gluster_finish_aiocb, &acb);
959 if (ret < 0) {
960 return -errno;
963 qemu_coroutine_yield();
964 return acb.ret;
966 #endif
968 static int qemu_gluster_create(const char *filename,
969 QemuOpts *opts, Error **errp)
971 BlockdevOptionsGluster *gconf;
972 struct glfs *glfs;
973 struct glfs_fd *fd;
974 int ret = 0;
975 PreallocMode prealloc;
976 int64_t total_size = 0;
977 char *tmp = NULL;
978 Error *local_err = NULL;
980 gconf = g_new0(BlockdevOptionsGluster, 1);
981 gconf->debug = qemu_opt_get_number_del(opts, GLUSTER_OPT_DEBUG,
982 GLUSTER_DEBUG_DEFAULT);
983 if (gconf->debug < 0) {
984 gconf->debug = 0;
985 } else if (gconf->debug > GLUSTER_DEBUG_MAX) {
986 gconf->debug = GLUSTER_DEBUG_MAX;
988 gconf->has_debug = true;
990 gconf->logfile = qemu_opt_get_del(opts, GLUSTER_OPT_LOGFILE);
991 if (!gconf->logfile) {
992 gconf->logfile = g_strdup(GLUSTER_LOGFILE_DEFAULT);
994 gconf->has_logfile = true;
996 glfs = qemu_gluster_init(gconf, filename, NULL, errp);
997 if (!glfs) {
998 ret = -errno;
999 goto out;
1002 total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
1003 BDRV_SECTOR_SIZE);
1005 tmp = qemu_opt_get_del(opts, BLOCK_OPT_PREALLOC);
1006 prealloc = qapi_enum_parse(PreallocMode_lookup, tmp,
1007 PREALLOC_MODE__MAX, PREALLOC_MODE_OFF,
1008 &local_err);
1009 g_free(tmp);
1010 if (local_err) {
1011 error_propagate(errp, local_err);
1012 ret = -EINVAL;
1013 goto out;
1016 fd = glfs_creat(glfs, gconf->path,
1017 O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, S_IRUSR | S_IWUSR);
1018 if (!fd) {
1019 ret = -errno;
1020 goto out;
1023 switch (prealloc) {
1024 #ifdef CONFIG_GLUSTERFS_FALLOCATE
1025 case PREALLOC_MODE_FALLOC:
1026 if (glfs_fallocate(fd, 0, 0, total_size)) {
1027 error_setg(errp, "Could not preallocate data for the new file");
1028 ret = -errno;
1030 break;
1031 #endif /* CONFIG_GLUSTERFS_FALLOCATE */
1032 #ifdef CONFIG_GLUSTERFS_ZEROFILL
1033 case PREALLOC_MODE_FULL:
1034 if (!glfs_ftruncate(fd, total_size)) {
1035 if (glfs_zerofill(fd, 0, total_size)) {
1036 error_setg(errp, "Could not zerofill the new file");
1037 ret = -errno;
1039 } else {
1040 error_setg(errp, "Could not resize file");
1041 ret = -errno;
1043 break;
1044 #endif /* CONFIG_GLUSTERFS_ZEROFILL */
1045 case PREALLOC_MODE_OFF:
1046 if (glfs_ftruncate(fd, total_size) != 0) {
1047 ret = -errno;
1048 error_setg(errp, "Could not resize file");
1050 break;
1051 default:
1052 ret = -EINVAL;
1053 error_setg(errp, "Unsupported preallocation mode: %s",
1054 PreallocMode_lookup[prealloc]);
1055 break;
1058 if (glfs_close(fd) != 0) {
1059 ret = -errno;
1061 out:
1062 qapi_free_BlockdevOptionsGluster(gconf);
1063 glfs_clear_preopened(glfs);
1064 return ret;
1067 static coroutine_fn int qemu_gluster_co_rw(BlockDriverState *bs,
1068 int64_t sector_num, int nb_sectors,
1069 QEMUIOVector *qiov, int write)
1071 int ret;
1072 GlusterAIOCB acb;
1073 BDRVGlusterState *s = bs->opaque;
1074 size_t size = nb_sectors * BDRV_SECTOR_SIZE;
1075 off_t offset = sector_num * BDRV_SECTOR_SIZE;
1077 acb.size = size;
1078 acb.ret = 0;
1079 acb.coroutine = qemu_coroutine_self();
1080 acb.aio_context = bdrv_get_aio_context(bs);
1082 if (write) {
1083 ret = glfs_pwritev_async(s->fd, qiov->iov, qiov->niov, offset, 0,
1084 gluster_finish_aiocb, &acb);
1085 } else {
1086 ret = glfs_preadv_async(s->fd, qiov->iov, qiov->niov, offset, 0,
1087 gluster_finish_aiocb, &acb);
1090 if (ret < 0) {
1091 return -errno;
1094 qemu_coroutine_yield();
1095 return acb.ret;
1098 static int qemu_gluster_truncate(BlockDriverState *bs, int64_t offset,
1099 Error **errp)
1101 int ret;
1102 BDRVGlusterState *s = bs->opaque;
1104 ret = glfs_ftruncate(s->fd, offset);
1105 if (ret < 0) {
1106 ret = -errno;
1107 error_setg_errno(errp, -ret, "Failed to truncate file");
1108 return ret;
1111 return 0;
1114 static coroutine_fn int qemu_gluster_co_readv(BlockDriverState *bs,
1115 int64_t sector_num,
1116 int nb_sectors,
1117 QEMUIOVector *qiov)
1119 return qemu_gluster_co_rw(bs, sector_num, nb_sectors, qiov, 0);
1122 static coroutine_fn int qemu_gluster_co_writev(BlockDriverState *bs,
1123 int64_t sector_num,
1124 int nb_sectors,
1125 QEMUIOVector *qiov)
1127 return qemu_gluster_co_rw(bs, sector_num, nb_sectors, qiov, 1);
1130 static void qemu_gluster_close(BlockDriverState *bs)
1132 BDRVGlusterState *s = bs->opaque;
1134 g_free(s->logfile);
1135 if (s->fd) {
1136 glfs_close(s->fd);
1137 s->fd = NULL;
1139 glfs_clear_preopened(s->glfs);
1142 static coroutine_fn int qemu_gluster_co_flush_to_disk(BlockDriverState *bs)
1144 int ret;
1145 GlusterAIOCB acb;
1146 BDRVGlusterState *s = bs->opaque;
1148 acb.size = 0;
1149 acb.ret = 0;
1150 acb.coroutine = qemu_coroutine_self();
1151 acb.aio_context = bdrv_get_aio_context(bs);
1153 ret = glfs_fsync_async(s->fd, gluster_finish_aiocb, &acb);
1154 if (ret < 0) {
1155 ret = -errno;
1156 goto error;
1159 qemu_coroutine_yield();
1160 if (acb.ret < 0) {
1161 ret = acb.ret;
1162 goto error;
1165 return acb.ret;
1167 error:
1168 /* Some versions of Gluster (3.5.6 -> 3.5.8?) will not retain its cache
1169 * after a fsync failure, so we have no way of allowing the guest to safely
1170 * continue. Gluster versions prior to 3.5.6 don't retain the cache
1171 * either, but will invalidate the fd on error, so this is again our only
1172 * option.
1174 * The 'resync-failed-syncs-after-fsync' xlator option for the
1175 * write-behind cache will cause later gluster versions to retain its
1176 * cache after error, so long as the fd remains open. However, we
1177 * currently have no way of knowing if this option is supported.
1179 * TODO: Once gluster provides a way for us to determine if the option
1180 * is supported, bypass the closure and setting drv to NULL. */
1181 qemu_gluster_close(bs);
1182 bs->drv = NULL;
1183 return ret;
1186 #ifdef CONFIG_GLUSTERFS_DISCARD
1187 static coroutine_fn int qemu_gluster_co_pdiscard(BlockDriverState *bs,
1188 int64_t offset, int size)
1190 int ret;
1191 GlusterAIOCB acb;
1192 BDRVGlusterState *s = bs->opaque;
1194 acb.size = 0;
1195 acb.ret = 0;
1196 acb.coroutine = qemu_coroutine_self();
1197 acb.aio_context = bdrv_get_aio_context(bs);
1199 ret = glfs_discard_async(s->fd, offset, size, gluster_finish_aiocb, &acb);
1200 if (ret < 0) {
1201 return -errno;
1204 qemu_coroutine_yield();
1205 return acb.ret;
1207 #endif
1209 static int64_t qemu_gluster_getlength(BlockDriverState *bs)
1211 BDRVGlusterState *s = bs->opaque;
1212 int64_t ret;
1214 ret = glfs_lseek(s->fd, 0, SEEK_END);
1215 if (ret < 0) {
1216 return -errno;
1217 } else {
1218 return ret;
1222 static int64_t qemu_gluster_allocated_file_size(BlockDriverState *bs)
1224 BDRVGlusterState *s = bs->opaque;
1225 struct stat st;
1226 int ret;
1228 ret = glfs_fstat(s->fd, &st);
1229 if (ret < 0) {
1230 return -errno;
1231 } else {
1232 return st.st_blocks * 512;
1236 static int qemu_gluster_has_zero_init(BlockDriverState *bs)
1238 /* GlusterFS volume could be backed by a block device */
1239 return 0;
1243 * Find allocation range in @bs around offset @start.
1244 * May change underlying file descriptor's file offset.
1245 * If @start is not in a hole, store @start in @data, and the
1246 * beginning of the next hole in @hole, and return 0.
1247 * If @start is in a non-trailing hole, store @start in @hole and the
1248 * beginning of the next non-hole in @data, and return 0.
1249 * If @start is in a trailing hole or beyond EOF, return -ENXIO.
1250 * If we can't find out, return a negative errno other than -ENXIO.
1252 * (Shamefully copied from file-posix.c, only miniscule adaptions.)
1254 static int find_allocation(BlockDriverState *bs, off_t start,
1255 off_t *data, off_t *hole)
1257 BDRVGlusterState *s = bs->opaque;
1259 if (!s->supports_seek_data) {
1260 goto exit;
1263 #if defined SEEK_HOLE && defined SEEK_DATA
1264 off_t offs;
1267 * SEEK_DATA cases:
1268 * D1. offs == start: start is in data
1269 * D2. offs > start: start is in a hole, next data at offs
1270 * D3. offs < 0, errno = ENXIO: either start is in a trailing hole
1271 * or start is beyond EOF
1272 * If the latter happens, the file has been truncated behind
1273 * our back since we opened it. All bets are off then.
1274 * Treating like a trailing hole is simplest.
1275 * D4. offs < 0, errno != ENXIO: we learned nothing
1277 offs = glfs_lseek(s->fd, start, SEEK_DATA);
1278 if (offs < 0) {
1279 return -errno; /* D3 or D4 */
1282 if (offs < start) {
1283 /* This is not a valid return by lseek(). We are safe to just return
1284 * -EIO in this case, and we'll treat it like D4. Unfortunately some
1285 * versions of gluster server will return offs < start, so an assert
1286 * here will unnecessarily abort QEMU. */
1287 return -EIO;
1290 if (offs > start) {
1291 /* D2: in hole, next data at offs */
1292 *hole = start;
1293 *data = offs;
1294 return 0;
1297 /* D1: in data, end not yet known */
1300 * SEEK_HOLE cases:
1301 * H1. offs == start: start is in a hole
1302 * If this happens here, a hole has been dug behind our back
1303 * since the previous lseek().
1304 * H2. offs > start: either start is in data, next hole at offs,
1305 * or start is in trailing hole, EOF at offs
1306 * Linux treats trailing holes like any other hole: offs ==
1307 * start. Solaris seeks to EOF instead: offs > start (blech).
1308 * If that happens here, a hole has been dug behind our back
1309 * since the previous lseek().
1310 * H3. offs < 0, errno = ENXIO: start is beyond EOF
1311 * If this happens, the file has been truncated behind our
1312 * back since we opened it. Treat it like a trailing hole.
1313 * H4. offs < 0, errno != ENXIO: we learned nothing
1314 * Pretend we know nothing at all, i.e. "forget" about D1.
1316 offs = glfs_lseek(s->fd, start, SEEK_HOLE);
1317 if (offs < 0) {
1318 return -errno; /* D1 and (H3 or H4) */
1321 if (offs < start) {
1322 /* This is not a valid return by lseek(). We are safe to just return
1323 * -EIO in this case, and we'll treat it like H4. Unfortunately some
1324 * versions of gluster server will return offs < start, so an assert
1325 * here will unnecessarily abort QEMU. */
1326 return -EIO;
1329 if (offs > start) {
1331 * D1 and H2: either in data, next hole at offs, or it was in
1332 * data but is now in a trailing hole. In the latter case,
1333 * all bets are off. Treating it as if it there was data all
1334 * the way to EOF is safe, so simply do that.
1336 *data = start;
1337 *hole = offs;
1338 return 0;
1341 /* D1 and H1 */
1342 return -EBUSY;
1343 #endif
1345 exit:
1346 return -ENOTSUP;
1350 * Returns the allocation status of the specified sectors.
1352 * If 'sector_num' is beyond the end of the disk image the return value is 0
1353 * and 'pnum' is set to 0.
1355 * 'pnum' is set to the number of sectors (including and immediately following
1356 * the specified sector) that are known to be in the same
1357 * allocated/unallocated state.
1359 * 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes
1360 * beyond the end of the disk image it will be clamped.
1362 * (Based on raw_co_get_block_status() from file-posix.c.)
1364 static int64_t coroutine_fn qemu_gluster_co_get_block_status(
1365 BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum,
1366 BlockDriverState **file)
1368 BDRVGlusterState *s = bs->opaque;
1369 off_t start, data = 0, hole = 0;
1370 int64_t total_size;
1371 int ret = -EINVAL;
1373 if (!s->fd) {
1374 return ret;
1377 start = sector_num * BDRV_SECTOR_SIZE;
1378 total_size = bdrv_getlength(bs);
1379 if (total_size < 0) {
1380 return total_size;
1381 } else if (start >= total_size) {
1382 *pnum = 0;
1383 return 0;
1384 } else if (start + nb_sectors * BDRV_SECTOR_SIZE > total_size) {
1385 nb_sectors = DIV_ROUND_UP(total_size - start, BDRV_SECTOR_SIZE);
1388 ret = find_allocation(bs, start, &data, &hole);
1389 if (ret == -ENXIO) {
1390 /* Trailing hole */
1391 *pnum = nb_sectors;
1392 ret = BDRV_BLOCK_ZERO;
1393 } else if (ret < 0) {
1394 /* No info available, so pretend there are no holes */
1395 *pnum = nb_sectors;
1396 ret = BDRV_BLOCK_DATA;
1397 } else if (data == start) {
1398 /* On a data extent, compute sectors to the end of the extent,
1399 * possibly including a partial sector at EOF. */
1400 *pnum = MIN(nb_sectors, DIV_ROUND_UP(hole - start, BDRV_SECTOR_SIZE));
1401 ret = BDRV_BLOCK_DATA;
1402 } else {
1403 /* On a hole, compute sectors to the beginning of the next extent. */
1404 assert(hole == start);
1405 *pnum = MIN(nb_sectors, (data - start) / BDRV_SECTOR_SIZE);
1406 ret = BDRV_BLOCK_ZERO;
1409 *file = bs;
1411 return ret | BDRV_BLOCK_OFFSET_VALID | start;
1415 static BlockDriver bdrv_gluster = {
1416 .format_name = "gluster",
1417 .protocol_name = "gluster",
1418 .instance_size = sizeof(BDRVGlusterState),
1419 .bdrv_needs_filename = false,
1420 .bdrv_file_open = qemu_gluster_open,
1421 .bdrv_reopen_prepare = qemu_gluster_reopen_prepare,
1422 .bdrv_reopen_commit = qemu_gluster_reopen_commit,
1423 .bdrv_reopen_abort = qemu_gluster_reopen_abort,
1424 .bdrv_close = qemu_gluster_close,
1425 .bdrv_create = qemu_gluster_create,
1426 .bdrv_getlength = qemu_gluster_getlength,
1427 .bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size,
1428 .bdrv_truncate = qemu_gluster_truncate,
1429 .bdrv_co_readv = qemu_gluster_co_readv,
1430 .bdrv_co_writev = qemu_gluster_co_writev,
1431 .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk,
1432 .bdrv_has_zero_init = qemu_gluster_has_zero_init,
1433 #ifdef CONFIG_GLUSTERFS_DISCARD
1434 .bdrv_co_pdiscard = qemu_gluster_co_pdiscard,
1435 #endif
1436 #ifdef CONFIG_GLUSTERFS_ZEROFILL
1437 .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
1438 #endif
1439 .bdrv_co_get_block_status = qemu_gluster_co_get_block_status,
1440 .create_opts = &qemu_gluster_create_opts,
1443 static BlockDriver bdrv_gluster_tcp = {
1444 .format_name = "gluster",
1445 .protocol_name = "gluster+tcp",
1446 .instance_size = sizeof(BDRVGlusterState),
1447 .bdrv_needs_filename = false,
1448 .bdrv_file_open = qemu_gluster_open,
1449 .bdrv_reopen_prepare = qemu_gluster_reopen_prepare,
1450 .bdrv_reopen_commit = qemu_gluster_reopen_commit,
1451 .bdrv_reopen_abort = qemu_gluster_reopen_abort,
1452 .bdrv_close = qemu_gluster_close,
1453 .bdrv_create = qemu_gluster_create,
1454 .bdrv_getlength = qemu_gluster_getlength,
1455 .bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size,
1456 .bdrv_truncate = qemu_gluster_truncate,
1457 .bdrv_co_readv = qemu_gluster_co_readv,
1458 .bdrv_co_writev = qemu_gluster_co_writev,
1459 .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk,
1460 .bdrv_has_zero_init = qemu_gluster_has_zero_init,
1461 #ifdef CONFIG_GLUSTERFS_DISCARD
1462 .bdrv_co_pdiscard = qemu_gluster_co_pdiscard,
1463 #endif
1464 #ifdef CONFIG_GLUSTERFS_ZEROFILL
1465 .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
1466 #endif
1467 .bdrv_co_get_block_status = qemu_gluster_co_get_block_status,
1468 .create_opts = &qemu_gluster_create_opts,
1471 static BlockDriver bdrv_gluster_unix = {
1472 .format_name = "gluster",
1473 .protocol_name = "gluster+unix",
1474 .instance_size = sizeof(BDRVGlusterState),
1475 .bdrv_needs_filename = true,
1476 .bdrv_file_open = qemu_gluster_open,
1477 .bdrv_reopen_prepare = qemu_gluster_reopen_prepare,
1478 .bdrv_reopen_commit = qemu_gluster_reopen_commit,
1479 .bdrv_reopen_abort = qemu_gluster_reopen_abort,
1480 .bdrv_close = qemu_gluster_close,
1481 .bdrv_create = qemu_gluster_create,
1482 .bdrv_getlength = qemu_gluster_getlength,
1483 .bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size,
1484 .bdrv_truncate = qemu_gluster_truncate,
1485 .bdrv_co_readv = qemu_gluster_co_readv,
1486 .bdrv_co_writev = qemu_gluster_co_writev,
1487 .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk,
1488 .bdrv_has_zero_init = qemu_gluster_has_zero_init,
1489 #ifdef CONFIG_GLUSTERFS_DISCARD
1490 .bdrv_co_pdiscard = qemu_gluster_co_pdiscard,
1491 #endif
1492 #ifdef CONFIG_GLUSTERFS_ZEROFILL
1493 .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
1494 #endif
1495 .bdrv_co_get_block_status = qemu_gluster_co_get_block_status,
1496 .create_opts = &qemu_gluster_create_opts,
1499 /* rdma is deprecated (actually never supported for volfile fetch).
1500 * Let's maintain it for the protocol compatibility, to make sure things
1501 * won't break immediately. For now, gluster+rdma will fall back to gluster+tcp
1502 * protocol with a warning.
1503 * TODO: remove gluster+rdma interface support
1505 static BlockDriver bdrv_gluster_rdma = {
1506 .format_name = "gluster",
1507 .protocol_name = "gluster+rdma",
1508 .instance_size = sizeof(BDRVGlusterState),
1509 .bdrv_needs_filename = true,
1510 .bdrv_file_open = qemu_gluster_open,
1511 .bdrv_reopen_prepare = qemu_gluster_reopen_prepare,
1512 .bdrv_reopen_commit = qemu_gluster_reopen_commit,
1513 .bdrv_reopen_abort = qemu_gluster_reopen_abort,
1514 .bdrv_close = qemu_gluster_close,
1515 .bdrv_create = qemu_gluster_create,
1516 .bdrv_getlength = qemu_gluster_getlength,
1517 .bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size,
1518 .bdrv_truncate = qemu_gluster_truncate,
1519 .bdrv_co_readv = qemu_gluster_co_readv,
1520 .bdrv_co_writev = qemu_gluster_co_writev,
1521 .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk,
1522 .bdrv_has_zero_init = qemu_gluster_has_zero_init,
1523 #ifdef CONFIG_GLUSTERFS_DISCARD
1524 .bdrv_co_pdiscard = qemu_gluster_co_pdiscard,
1525 #endif
1526 #ifdef CONFIG_GLUSTERFS_ZEROFILL
1527 .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
1528 #endif
1529 .bdrv_co_get_block_status = qemu_gluster_co_get_block_status,
1530 .create_opts = &qemu_gluster_create_opts,
1533 static void bdrv_gluster_init(void)
1535 bdrv_register(&bdrv_gluster_rdma);
1536 bdrv_register(&bdrv_gluster_unix);
1537 bdrv_register(&bdrv_gluster_tcp);
1538 bdrv_register(&bdrv_gluster);
1541 block_init(bdrv_gluster_init);