blob: 8c1968bb415d9a9e542988fd51128b9f302caa1c [file] [log] [blame]
Peter Lieven6542aa92014-02-03 10:26:13 +01001/*
2 * QEMU Block driver for native access to files on NFS shares
3 *
Peter Lievenf1a7ff72017-11-27 17:00:07 +01004 * Copyright (c) 2014-2017 Peter Lieven <pl@kamp.de>
Peter Lieven6542aa92014-02-03 10:26:13 +01005 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24
Peter Maydell80c71a22016-01-18 18:01:42 +000025#include "qemu/osdep.h"
Peter Lieven6542aa92014-02-03 10:26:13 +010026
Yonggang Luoc63b0202020-11-05 20:31:15 +080027#if !defined(_WIN32)
Peter Lieven6542aa92014-02-03 10:26:13 +010028#include <poll.h>
Yonggang Luoc63b0202020-11-05 20:31:15 +080029#endif
Peter Lieven6542aa92014-02-03 10:26:13 +010030#include "qemu/config-file.h"
31#include "qemu/error-report.h"
Stefan Hajnoczid165b8c2016-03-30 13:46:33 +010032#include "qapi/error.h"
Peter Lieven6542aa92014-02-03 10:26:13 +010033#include "block/block_int.h"
Max Reitz609f45e2018-06-14 21:14:28 +020034#include "block/qdict.h"
Peter Lieven6542aa92014-02-03 10:26:13 +010035#include "trace.h"
36#include "qemu/iov.h"
Markus Armbrusterdb725812019-08-12 07:23:50 +020037#include "qemu/main-loop.h"
Markus Armbruster0b8fa322019-05-23 16:35:07 +020038#include "qemu/module.h"
Markus Armbruster922a01a2018-02-01 12:18:46 +010039#include "qemu/option.h"
Peter Lieven6542aa92014-02-03 10:26:13 +010040#include "qemu/uri.h"
Stefan Hajnoczi0d94b742016-03-30 13:46:34 +010041#include "qemu/cutils.h"
Pavel Dovgalyuke4ec5ad2019-09-17 14:58:19 +030042#include "sysemu/sysemu.h"
43#include "sysemu/replay.h"
Markus Armbruster9af23982018-02-11 10:36:01 +010044#include "qapi/qapi-visit-block-core.h"
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +053045#include "qapi/qmp/qdict.h"
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +053046#include "qapi/qmp/qstring.h"
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +053047#include "qapi/qobject-input-visitor.h"
48#include "qapi/qobject-output-visitor.h"
Peter Lieven6542aa92014-02-03 10:26:13 +010049#include <nfsc/libnfs.h>
50
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +053051
Peter Lieven29c838c2015-06-26 13:14:01 +020052#define QEMU_NFS_MAX_READAHEAD_SIZE 1048576
Peter Lievend99b26c2016-05-19 14:48:03 +020053#define QEMU_NFS_MAX_PAGECACHE_SIZE (8388608 / NFS_BLKSIZE)
Peter Lieven7725b8b2015-11-09 08:09:33 +010054#define QEMU_NFS_MAX_DEBUG_LEVEL 2
Peter Lieven29c838c2015-06-26 13:14:01 +020055
Peter Lieven6542aa92014-02-03 10:26:13 +010056typedef struct NFSClient {
57 struct nfs_context *context;
58 struct nfsfh *fh;
59 int events;
60 bool has_zero_init;
Stefan Hajnoczi471799d2014-05-08 16:34:44 +020061 AioContext *aio_context;
Paolo Bonzini37d1e4d2017-02-22 19:07:24 +010062 QemuMutex mutex;
Yonggang Luoc63b0202020-11-05 20:31:15 +080063 uint64_t st_blocks;
Peter Lieven38f8d5e2016-05-19 14:48:02 +020064 bool cache_used;
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +053065 NFSServer *server;
66 char *path;
67 int64_t uid, gid, tcp_syncnt, readahead, pagecache, debug;
Peter Lieven6542aa92014-02-03 10:26:13 +010068} NFSClient;
69
70typedef struct NFSRPC {
Paolo Bonzinid7464272016-10-27 12:48:57 +020071 BlockDriverState *bs;
Peter Lieven6542aa92014-02-03 10:26:13 +010072 int ret;
73 int complete;
74 QEMUIOVector *iov;
75 struct stat *st;
76 Coroutine *co;
Stefan Hajnoczi471799d2014-05-08 16:34:44 +020077 NFSClient *client;
Peter Lieven6542aa92014-02-03 10:26:13 +010078} NFSRPC;
79
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +053080static int nfs_parse_uri(const char *filename, QDict *options, Error **errp)
81{
82 URI *uri = NULL;
83 QueryParams *qp = NULL;
84 int ret = -EINVAL, i;
85
86 uri = uri_parse(filename);
87 if (!uri) {
88 error_setg(errp, "Invalid URI specified");
89 goto out;
90 }
Max Reitzf69165a2017-06-13 22:57:26 +020091 if (g_strcmp0(uri->scheme, "nfs") != 0) {
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +053092 error_setg(errp, "URI scheme must be 'nfs'");
93 goto out;
94 }
95
96 if (!uri->server) {
97 error_setg(errp, "missing hostname in URI");
98 goto out;
99 }
100
101 if (!uri->path) {
102 error_setg(errp, "missing file path in URI");
103 goto out;
104 }
105
106 qp = query_params_parse(uri->query);
107 if (!qp) {
108 error_setg(errp, "could not parse query parameters");
109 goto out;
110 }
111
Eric Blake46f5ac22017-04-27 16:58:17 -0500112 qdict_put_str(options, "server.host", uri->server);
113 qdict_put_str(options, "server.type", "inet");
114 qdict_put_str(options, "path", uri->path);
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530115
116 for (i = 0; i < qp->n; i++) {
Peter Lieven8d20abe2017-02-01 10:53:48 +0100117 unsigned long long val;
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530118 if (!qp->p[i].value) {
119 error_setg(errp, "Value for NFS parameter expected: %s",
120 qp->p[i].name);
121 goto out;
122 }
Peter Lieven8d20abe2017-02-01 10:53:48 +0100123 if (parse_uint_full(qp->p[i].value, &val, 0)) {
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530124 error_setg(errp, "Illegal value for NFS parameter: %s",
125 qp->p[i].name);
126 goto out;
127 }
128 if (!strcmp(qp->p[i].name, "uid")) {
Eric Blake46f5ac22017-04-27 16:58:17 -0500129 qdict_put_str(options, "user", qp->p[i].value);
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530130 } else if (!strcmp(qp->p[i].name, "gid")) {
Eric Blake46f5ac22017-04-27 16:58:17 -0500131 qdict_put_str(options, "group", qp->p[i].value);
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530132 } else if (!strcmp(qp->p[i].name, "tcp-syncnt")) {
Eric Blake46f5ac22017-04-27 16:58:17 -0500133 qdict_put_str(options, "tcp-syn-count", qp->p[i].value);
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530134 } else if (!strcmp(qp->p[i].name, "readahead")) {
Eric Blake46f5ac22017-04-27 16:58:17 -0500135 qdict_put_str(options, "readahead-size", qp->p[i].value);
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530136 } else if (!strcmp(qp->p[i].name, "pagecache")) {
Eric Blake46f5ac22017-04-27 16:58:17 -0500137 qdict_put_str(options, "page-cache-size", qp->p[i].value);
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530138 } else if (!strcmp(qp->p[i].name, "debug")) {
Eric Blake46f5ac22017-04-27 16:58:17 -0500139 qdict_put_str(options, "debug", qp->p[i].value);
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530140 } else {
141 error_setg(errp, "Unknown NFS parameter name: %s",
142 qp->p[i].name);
143 goto out;
144 }
145 }
146 ret = 0;
147out:
148 if (qp) {
149 query_params_free(qp);
150 }
151 if (uri) {
152 uri_free(uri);
153 }
154 return ret;
155}
156
157static bool nfs_has_filename_options_conflict(QDict *options, Error **errp)
158{
159 const QDictEntry *qe;
160
161 for (qe = qdict_first(options); qe; qe = qdict_next(options, qe)) {
162 if (!strcmp(qe->key, "host") ||
163 !strcmp(qe->key, "path") ||
164 !strcmp(qe->key, "user") ||
165 !strcmp(qe->key, "group") ||
166 !strcmp(qe->key, "tcp-syn-count") ||
167 !strcmp(qe->key, "readahead-size") ||
168 !strcmp(qe->key, "page-cache-size") ||
Prasanna Kumar Kalever7103d912016-11-02 22:20:37 +0530169 !strcmp(qe->key, "debug") ||
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530170 strstart(qe->key, "server.", NULL))
171 {
172 error_setg(errp, "Option %s cannot be used with a filename",
173 qe->key);
174 return true;
175 }
176 }
177
178 return false;
179}
180
181static void nfs_parse_filename(const char *filename, QDict *options,
182 Error **errp)
183{
184 if (nfs_has_filename_options_conflict(options, errp)) {
185 return;
186 }
187
188 nfs_parse_uri(filename, options, errp);
189}
190
Peter Lieven6542aa92014-02-03 10:26:13 +0100191static void nfs_process_read(void *arg);
192static void nfs_process_write(void *arg);
193
Paolo Bonzini37d1e4d2017-02-22 19:07:24 +0100194/* Called with QemuMutex held. */
Peter Lieven6542aa92014-02-03 10:26:13 +0100195static void nfs_set_events(NFSClient *client)
196{
197 int ev = nfs_which_events(client->context);
198 if (ev != client->events) {
Fam Zhengdca21ef2015-10-23 11:08:05 +0800199 aio_set_fd_handler(client->aio_context, nfs_get_fd(client->context),
200 false,
Stefan Hajnoczi471799d2014-05-08 16:34:44 +0200201 (ev & POLLIN) ? nfs_process_read : NULL,
Stefan Hajnoczif6a51c82016-12-01 19:26:41 +0000202 (ev & POLLOUT) ? nfs_process_write : NULL,
203 NULL, client);
Peter Lieven6542aa92014-02-03 10:26:13 +0100204
205 }
206 client->events = ev;
207}
208
209static void nfs_process_read(void *arg)
210{
211 NFSClient *client = arg;
Paolo Bonzini9d456652017-02-13 14:52:30 +0100212
Paolo Bonzini37d1e4d2017-02-22 19:07:24 +0100213 qemu_mutex_lock(&client->mutex);
Peter Lieven6542aa92014-02-03 10:26:13 +0100214 nfs_service(client->context, POLLIN);
215 nfs_set_events(client);
Paolo Bonzini37d1e4d2017-02-22 19:07:24 +0100216 qemu_mutex_unlock(&client->mutex);
Peter Lieven6542aa92014-02-03 10:26:13 +0100217}
218
219static void nfs_process_write(void *arg)
220{
221 NFSClient *client = arg;
Paolo Bonzini9d456652017-02-13 14:52:30 +0100222
Paolo Bonzini37d1e4d2017-02-22 19:07:24 +0100223 qemu_mutex_lock(&client->mutex);
Peter Lieven6542aa92014-02-03 10:26:13 +0100224 nfs_service(client->context, POLLOUT);
225 nfs_set_events(client);
Paolo Bonzini37d1e4d2017-02-22 19:07:24 +0100226 qemu_mutex_unlock(&client->mutex);
Peter Lieven6542aa92014-02-03 10:26:13 +0100227}
228
Paolo Bonzinid7464272016-10-27 12:48:57 +0200229static void nfs_co_init_task(BlockDriverState *bs, NFSRPC *task)
Peter Lieven6542aa92014-02-03 10:26:13 +0100230{
231 *task = (NFSRPC) {
Stefan Hajnoczi471799d2014-05-08 16:34:44 +0200232 .co = qemu_coroutine_self(),
Paolo Bonzinid7464272016-10-27 12:48:57 +0200233 .bs = bs,
234 .client = bs->opaque,
Peter Lieven6542aa92014-02-03 10:26:13 +0100235 };
236}
237
238static void nfs_co_generic_bh_cb(void *opaque)
239{
240 NFSRPC *task = opaque;
Paolo Bonzini19196312017-02-13 14:52:31 +0100241
Peter Lievena2c0fe22014-06-10 09:42:47 +0200242 task->complete = 1;
Paolo Bonzini19196312017-02-13 14:52:31 +0100243 aio_co_wake(task->co);
Peter Lieven6542aa92014-02-03 10:26:13 +0100244}
245
Paolo Bonzini37d1e4d2017-02-22 19:07:24 +0100246/* Called (via nfs_service) with QemuMutex held. */
Peter Lieven6542aa92014-02-03 10:26:13 +0100247static void
248nfs_co_generic_cb(int ret, struct nfs_context *nfs, void *data,
249 void *private_data)
250{
251 NFSRPC *task = private_data;
Peter Lieven6542aa92014-02-03 10:26:13 +0100252 task->ret = ret;
Paolo Bonzinid7464272016-10-27 12:48:57 +0200253 assert(!task->st);
Peter Lieven6542aa92014-02-03 10:26:13 +0100254 if (task->ret > 0 && task->iov) {
255 if (task->ret <= task->iov->size) {
256 qemu_iovec_from_buf(task->iov, 0, data, task->ret);
257 } else {
258 task->ret = -EIO;
259 }
260 }
Peter Lieven20fccb12014-03-17 09:37:21 +0100261 if (task->ret < 0) {
262 error_report("NFS Error: %s", nfs_get_error(nfs));
263 }
Pavel Dovgalyuke4ec5ad2019-09-17 14:58:19 +0300264 replay_bh_schedule_oneshot_event(task->client->aio_context,
265 nfs_co_generic_bh_cb, task);
Peter Lieven6542aa92014-02-03 10:26:13 +0100266}
267
Peter Lieven69785a22017-02-17 17:39:00 +0100268static int coroutine_fn nfs_co_preadv(BlockDriverState *bs, uint64_t offset,
269 uint64_t bytes, QEMUIOVector *iov,
270 int flags)
Peter Lieven6542aa92014-02-03 10:26:13 +0100271{
272 NFSClient *client = bs->opaque;
273 NFSRPC task;
274
Paolo Bonzinid7464272016-10-27 12:48:57 +0200275 nfs_co_init_task(bs, &task);
Peter Lieven6542aa92014-02-03 10:26:13 +0100276 task.iov = iov;
277
Daniel Brodsky6e8a3552020-04-03 21:21:08 -0700278 WITH_QEMU_LOCK_GUARD(&client->mutex) {
279 if (nfs_pread_async(client->context, client->fh,
280 offset, bytes, nfs_co_generic_cb, &task) != 0) {
281 return -ENOMEM;
282 }
Peter Lieven6542aa92014-02-03 10:26:13 +0100283
Daniel Brodsky6e8a3552020-04-03 21:21:08 -0700284 nfs_set_events(client);
285 }
Peter Lieven6542aa92014-02-03 10:26:13 +0100286 while (!task.complete) {
Peter Lieven6542aa92014-02-03 10:26:13 +0100287 qemu_coroutine_yield();
288 }
289
290 if (task.ret < 0) {
291 return task.ret;
292 }
293
294 /* zero pad short reads */
295 if (task.ret < iov->size) {
296 qemu_iovec_memset(iov, task.ret, 0, iov->size - task.ret);
297 }
298
299 return 0;
300}
301
Peter Lieven69785a22017-02-17 17:39:00 +0100302static int coroutine_fn nfs_co_pwritev(BlockDriverState *bs, uint64_t offset,
303 uint64_t bytes, QEMUIOVector *iov,
304 int flags)
Peter Lieven6542aa92014-02-03 10:26:13 +0100305{
306 NFSClient *client = bs->opaque;
307 NFSRPC task;
308 char *buf = NULL;
Peter Lievenef503a82017-02-17 17:39:01 +0100309 bool my_buffer = false;
Peter Lieven6542aa92014-02-03 10:26:13 +0100310
Paolo Bonzinid7464272016-10-27 12:48:57 +0200311 nfs_co_init_task(bs, &task);
Peter Lieven6542aa92014-02-03 10:26:13 +0100312
Peter Lievenef503a82017-02-17 17:39:01 +0100313 if (iov->niov != 1) {
314 buf = g_try_malloc(bytes);
315 if (bytes && buf == NULL) {
316 return -ENOMEM;
317 }
318 qemu_iovec_to_buf(iov, 0, buf, bytes);
319 my_buffer = true;
320 } else {
321 buf = iov->iov[0].iov_base;
Kevin Wolf2347dd72014-05-20 13:31:20 +0200322 }
323
Daniel Brodsky6e8a3552020-04-03 21:21:08 -0700324 WITH_QEMU_LOCK_GUARD(&client->mutex) {
325 if (nfs_pwrite_async(client->context, client->fh,
326 offset, bytes, buf,
327 nfs_co_generic_cb, &task) != 0) {
328 if (my_buffer) {
329 g_free(buf);
330 }
331 return -ENOMEM;
Peter Lievenef503a82017-02-17 17:39:01 +0100332 }
Peter Lieven6542aa92014-02-03 10:26:13 +0100333
Daniel Brodsky6e8a3552020-04-03 21:21:08 -0700334 nfs_set_events(client);
335 }
Peter Lieven6542aa92014-02-03 10:26:13 +0100336 while (!task.complete) {
Peter Lieven6542aa92014-02-03 10:26:13 +0100337 qemu_coroutine_yield();
338 }
339
Peter Lievenef503a82017-02-17 17:39:01 +0100340 if (my_buffer) {
341 g_free(buf);
342 }
Peter Lieven6542aa92014-02-03 10:26:13 +0100343
Peter Lieven69785a22017-02-17 17:39:00 +0100344 if (task.ret != bytes) {
Peter Lieven6542aa92014-02-03 10:26:13 +0100345 return task.ret < 0 ? task.ret : -EIO;
346 }
347
348 return 0;
349}
350
351static int coroutine_fn nfs_co_flush(BlockDriverState *bs)
352{
353 NFSClient *client = bs->opaque;
354 NFSRPC task;
355
Paolo Bonzinid7464272016-10-27 12:48:57 +0200356 nfs_co_init_task(bs, &task);
Peter Lieven6542aa92014-02-03 10:26:13 +0100357
Daniel Brodsky6e8a3552020-04-03 21:21:08 -0700358 WITH_QEMU_LOCK_GUARD(&client->mutex) {
359 if (nfs_fsync_async(client->context, client->fh, nfs_co_generic_cb,
360 &task) != 0) {
361 return -ENOMEM;
362 }
Peter Lieven6542aa92014-02-03 10:26:13 +0100363
Daniel Brodsky6e8a3552020-04-03 21:21:08 -0700364 nfs_set_events(client);
365 }
Peter Lieven6542aa92014-02-03 10:26:13 +0100366 while (!task.complete) {
Peter Lieven6542aa92014-02-03 10:26:13 +0100367 qemu_coroutine_yield();
368 }
369
370 return task.ret;
371}
372
Stefan Hajnoczi471799d2014-05-08 16:34:44 +0200373static void nfs_detach_aio_context(BlockDriverState *bs)
374{
375 NFSClient *client = bs->opaque;
376
Fam Zhengdca21ef2015-10-23 11:08:05 +0800377 aio_set_fd_handler(client->aio_context, nfs_get_fd(client->context),
Stefan Hajnoczif6a51c82016-12-01 19:26:41 +0000378 false, NULL, NULL, NULL, NULL);
Stefan Hajnoczi471799d2014-05-08 16:34:44 +0200379 client->events = 0;
380}
381
382static void nfs_attach_aio_context(BlockDriverState *bs,
383 AioContext *new_context)
384{
385 NFSClient *client = bs->opaque;
386
387 client->aio_context = new_context;
388 nfs_set_events(client);
389}
390
Peter Lieven6542aa92014-02-03 10:26:13 +0100391static void nfs_client_close(NFSClient *client)
392{
393 if (client->context) {
Peter Lieven601dc652019-09-10 17:41:09 +0200394 qemu_mutex_lock(&client->mutex);
395 aio_set_fd_handler(client->aio_context, nfs_get_fd(client->context),
396 false, NULL, NULL, NULL, NULL);
397 qemu_mutex_unlock(&client->mutex);
Peter Lieven6542aa92014-02-03 10:26:13 +0100398 if (client->fh) {
399 nfs_close(client->context, client->fh);
Jeff Cody113fe792017-08-07 18:29:09 -0400400 client->fh = NULL;
Peter Lieven6542aa92014-02-03 10:26:13 +0100401 }
Peter Lievend2c6bec2019-09-10 17:41:10 +0200402#ifdef LIBNFS_FEATURE_UMOUNT
403 nfs_umount(client->context);
404#endif
Peter Lieven6542aa92014-02-03 10:26:13 +0100405 nfs_destroy_context(client->context);
Jeff Cody113fe792017-08-07 18:29:09 -0400406 client->context = NULL;
Peter Lieven6542aa92014-02-03 10:26:13 +0100407 }
Jeff Cody113fe792017-08-07 18:29:09 -0400408 g_free(client->path);
409 qemu_mutex_destroy(&client->mutex);
410 qapi_free_NFSServer(client->server);
411 client->server = NULL;
Peter Lieven6542aa92014-02-03 10:26:13 +0100412}
413
414static void nfs_file_close(BlockDriverState *bs)
415{
416 NFSClient *client = bs->opaque;
417 nfs_client_close(client);
418}
419
Kevin Wolfc22a0342018-01-31 19:47:48 +0100420static int64_t nfs_client_open(NFSClient *client, BlockdevOptionsNfs *opts,
Fam Zhengcb8d4bf2017-04-21 20:27:05 +0800421 int flags, int open_flags, Error **errp)
Peter Lieven6542aa92014-02-03 10:26:13 +0100422{
Peter Lievenf1a7ff72017-11-27 17:00:07 +0100423 int64_t ret = -EINVAL;
Peter Lieven6542aa92014-02-03 10:26:13 +0100424 struct stat st;
Peter Lieven6542aa92014-02-03 10:26:13 +0100425 char *file = NULL, *strp = NULL;
426
Jeff Cody113fe792017-08-07 18:29:09 -0400427 qemu_mutex_init(&client->mutex);
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530428
Kevin Wolfc22a0342018-01-31 19:47:48 +0100429 client->path = g_strdup(opts->path);
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530430
431 strp = strrchr(client->path, '/');
Peter Lieven6542aa92014-02-03 10:26:13 +0100432 if (strp == NULL) {
433 error_setg(errp, "Invalid URL specified");
434 goto fail;
435 }
436 file = g_strdup(strp);
437 *strp = 0;
438
Kevin Wolfc22a0342018-01-31 19:47:48 +0100439 /* Steal the NFSServer object from opts; set the original pointer to NULL
440 * to avoid use after free and double free. */
441 client->server = opts->server;
442 opts->server = NULL;
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530443
Peter Lieven6542aa92014-02-03 10:26:13 +0100444 client->context = nfs_init_context();
445 if (client->context == NULL) {
446 error_setg(errp, "Failed to init NFS context");
447 goto fail;
448 }
449
Kevin Wolfc22a0342018-01-31 19:47:48 +0100450 if (opts->has_user) {
451 client->uid = opts->user;
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530452 nfs_set_uid(client->context, client->uid);
Peter Lieven6542aa92014-02-03 10:26:13 +0100453 }
454
Kevin Wolfc22a0342018-01-31 19:47:48 +0100455 if (opts->has_group) {
456 client->gid = opts->group;
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530457 nfs_set_gid(client->context, client->gid);
458 }
459
Kevin Wolfc22a0342018-01-31 19:47:48 +0100460 if (opts->has_tcp_syn_count) {
461 client->tcp_syncnt = opts->tcp_syn_count;
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530462 nfs_set_tcp_syncnt(client->context, client->tcp_syncnt);
463 }
464
465#ifdef LIBNFS_FEATURE_READAHEAD
Kevin Wolfc22a0342018-01-31 19:47:48 +0100466 if (opts->has_readahead_size) {
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530467 if (open_flags & BDRV_O_NOCACHE) {
468 error_setg(errp, "Cannot enable NFS readahead "
469 "if cache.direct = on");
470 goto fail;
471 }
Kevin Wolfc22a0342018-01-31 19:47:48 +0100472 client->readahead = opts->readahead_size;
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530473 if (client->readahead > QEMU_NFS_MAX_READAHEAD_SIZE) {
Alistair Francis3dc6f862017-07-12 06:57:41 -0700474 warn_report("Truncating NFS readahead size to %d",
475 QEMU_NFS_MAX_READAHEAD_SIZE);
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530476 client->readahead = QEMU_NFS_MAX_READAHEAD_SIZE;
477 }
478 nfs_set_readahead(client->context, client->readahead);
479#ifdef LIBNFS_FEATURE_PAGECACHE
480 nfs_set_pagecache_ttl(client->context, 0);
481#endif
482 client->cache_used = true;
483 }
484#endif
485
486#ifdef LIBNFS_FEATURE_PAGECACHE
Kevin Wolfc22a0342018-01-31 19:47:48 +0100487 if (opts->has_page_cache_size) {
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530488 if (open_flags & BDRV_O_NOCACHE) {
489 error_setg(errp, "Cannot enable NFS pagecache "
490 "if cache.direct = on");
491 goto fail;
492 }
Kevin Wolfc22a0342018-01-31 19:47:48 +0100493 client->pagecache = opts->page_cache_size;
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530494 if (client->pagecache > QEMU_NFS_MAX_PAGECACHE_SIZE) {
Alistair Francis3dc6f862017-07-12 06:57:41 -0700495 warn_report("Truncating NFS pagecache size to %d pages",
496 QEMU_NFS_MAX_PAGECACHE_SIZE);
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530497 client->pagecache = QEMU_NFS_MAX_PAGECACHE_SIZE;
498 }
499 nfs_set_pagecache(client->context, client->pagecache);
500 nfs_set_pagecache_ttl(client->context, 0);
501 client->cache_used = true;
502 }
503#endif
504
505#ifdef LIBNFS_FEATURE_DEBUG
Kevin Wolfc22a0342018-01-31 19:47:48 +0100506 if (opts->has_debug) {
507 client->debug = opts->debug;
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530508 /* limit the maximum debug level to avoid potential flooding
509 * of our log files. */
510 if (client->debug > QEMU_NFS_MAX_DEBUG_LEVEL) {
Alistair Francis3dc6f862017-07-12 06:57:41 -0700511 warn_report("Limiting NFS debug level to %d",
512 QEMU_NFS_MAX_DEBUG_LEVEL);
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530513 client->debug = QEMU_NFS_MAX_DEBUG_LEVEL;
514 }
515 nfs_set_debug(client->context, client->debug);
516 }
517#endif
518
519 ret = nfs_mount(client->context, client->server->host, client->path);
Peter Lieven6542aa92014-02-03 10:26:13 +0100520 if (ret < 0) {
521 error_setg(errp, "Failed to mount nfs share: %s",
522 nfs_get_error(client->context));
523 goto fail;
524 }
525
526 if (flags & O_CREAT) {
527 ret = nfs_creat(client->context, file, 0600, &client->fh);
528 if (ret < 0) {
529 error_setg(errp, "Failed to create file: %s",
530 nfs_get_error(client->context));
531 goto fail;
532 }
533 } else {
534 ret = nfs_open(client->context, file, flags, &client->fh);
535 if (ret < 0) {
536 error_setg(errp, "Failed to open file : %s",
537 nfs_get_error(client->context));
538 goto fail;
539 }
540 }
541
542 ret = nfs_fstat(client->context, client->fh, &st);
543 if (ret < 0) {
544 error_setg(errp, "Failed to fstat file: %s",
545 nfs_get_error(client->context));
546 goto fail;
547 }
548
549 ret = DIV_ROUND_UP(st.st_size, BDRV_SECTOR_SIZE);
Yonggang Luoc63b0202020-11-05 20:31:15 +0800550#if !defined(_WIN32)
Peter Lieven18a80562015-08-27 12:30:41 +0200551 client->st_blocks = st.st_blocks;
Yonggang Luoc63b0202020-11-05 20:31:15 +0800552#endif
Peter Lieven6542aa92014-02-03 10:26:13 +0100553 client->has_zero_init = S_ISREG(st.st_mode);
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530554 *strp = '/';
Peter Lieven6542aa92014-02-03 10:26:13 +0100555 goto out;
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530556
Peter Lieven6542aa92014-02-03 10:26:13 +0100557fail:
558 nfs_client_close(client);
559out:
Peter Lieven6542aa92014-02-03 10:26:13 +0100560 g_free(file);
561 return ret;
562}
563
Kevin Wolfa1a42af2018-01-31 16:27:38 +0100564static BlockdevOptionsNfs *nfs_options_qdict_to_qapi(QDict *options,
565 Error **errp)
Kevin Wolfc22a0342018-01-31 19:47:48 +0100566{
567 BlockdevOptionsNfs *opts = NULL;
Kevin Wolfc22a0342018-01-31 19:47:48 +0100568 Visitor *v;
Kevin Wolfc82be422018-05-16 18:08:16 +0200569 const QDictEntry *e;
Kevin Wolfc22a0342018-01-31 19:47:48 +0100570
Markus Armbrusteraf910622018-06-14 21:14:33 +0200571 v = qobject_input_visitor_new_flat_confused(options, errp);
572 if (!v) {
Kevin Wolfa1a42af2018-01-31 16:27:38 +0100573 return NULL;
Kevin Wolfc22a0342018-01-31 19:47:48 +0100574 }
575
Markus Armbrusterb11a0932020-07-07 18:06:07 +0200576 visit_type_BlockdevOptionsNfs(v, NULL, &opts, errp);
Kevin Wolfc22a0342018-01-31 19:47:48 +0100577 visit_free(v);
Markus Armbrusterb11a0932020-07-07 18:06:07 +0200578 if (!opts) {
Kevin Wolfa1a42af2018-01-31 16:27:38 +0100579 return NULL;
580 }
581
Kevin Wolfc82be422018-05-16 18:08:16 +0200582 /* Remove the processed options from the QDict (the visitor processes
583 * _all_ options in the QDict) */
584 while ((e = qdict_first(options))) {
585 qdict_del(options, e->key);
586 }
587
Kevin Wolfa1a42af2018-01-31 16:27:38 +0100588 return opts;
589}
590
591static int64_t nfs_client_open_qdict(NFSClient *client, QDict *options,
592 int flags, int open_flags, Error **errp)
593{
594 BlockdevOptionsNfs *opts;
Peter Lieven182454d2020-12-09 13:17:35 +0100595 int64_t ret;
Kevin Wolfa1a42af2018-01-31 16:27:38 +0100596
597 opts = nfs_options_qdict_to_qapi(options, errp);
598 if (opts == NULL) {
Kevin Wolfc22a0342018-01-31 19:47:48 +0100599 ret = -EINVAL;
600 goto fail;
601 }
602
603 ret = nfs_client_open(client, opts, flags, open_flags, errp);
604fail:
Kevin Wolfc22a0342018-01-31 19:47:48 +0100605 qapi_free_BlockdevOptionsNfs(opts);
606 return ret;
607}
608
Peter Lieven6542aa92014-02-03 10:26:13 +0100609static int nfs_file_open(BlockDriverState *bs, QDict *options, int flags,
610 Error **errp) {
611 NFSClient *client = bs->opaque;
612 int64_t ret;
Peter Lieven6542aa92014-02-03 10:26:13 +0100613
Stefan Hajnoczi471799d2014-05-08 16:34:44 +0200614 client->aio_context = bdrv_get_aio_context(bs);
615
Kevin Wolfc22a0342018-01-31 19:47:48 +0100616 ret = nfs_client_open_qdict(client, options,
617 (flags & BDRV_O_RDWR) ? O_RDWR : O_RDONLY,
618 bs->open_flags, errp);
Peter Lieven6542aa92014-02-03 10:26:13 +0100619 if (ret < 0) {
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530620 return ret;
Peter Lieven6542aa92014-02-03 10:26:13 +0100621 }
Jeff Cody113fe792017-08-07 18:29:09 -0400622
Peter Lieven6542aa92014-02-03 10:26:13 +0100623 bs->total_sectors = ret;
Eric Blake8f23aaf2020-04-28 15:28:59 -0500624 if (client->has_zero_init) {
625 bs->supported_truncate_flags = BDRV_REQ_ZERO_WRITE;
626 }
Simran Singhalb3ac2b92020-04-01 22:23:14 +0530627 return 0;
Peter Lieven6542aa92014-02-03 10:26:13 +0100628}
629
Max Reitzfd752802014-12-02 18:32:44 +0100630static QemuOptsList nfs_create_opts = {
631 .name = "nfs-create-opts",
632 .head = QTAILQ_HEAD_INITIALIZER(nfs_create_opts.head),
633 .desc = {
634 {
635 .name = BLOCK_OPT_SIZE,
636 .type = QEMU_OPT_SIZE,
637 .help = "Virtual disk size"
638 },
639 { /* end of list */ }
640 }
641};
642
Kevin Wolfa1a42af2018-01-31 16:27:38 +0100643static int nfs_file_co_create(BlockdevCreateOptions *options, Error **errp)
Peter Lieven6542aa92014-02-03 10:26:13 +0100644{
Kevin Wolfa1a42af2018-01-31 16:27:38 +0100645 BlockdevCreateOptionsNfs *opts = &options->u.nfs;
Markus Armbruster5839e532014-08-19 10:31:08 +0200646 NFSClient *client = g_new0(NFSClient, 1);
Kevin Wolfa1a42af2018-01-31 16:27:38 +0100647 int ret;
648
649 assert(options->driver == BLOCKDEV_DRIVER_NFS);
Peter Lieven6542aa92014-02-03 10:26:13 +0100650
Stefan Hajnoczi471799d2014-05-08 16:34:44 +0200651 client->aio_context = qemu_get_aio_context();
652
Kevin Wolfa1a42af2018-01-31 16:27:38 +0100653 ret = nfs_client_open(client, opts->location, O_CREAT, 0, errp);
654 if (ret < 0) {
655 goto out;
656 }
657 ret = nfs_ftruncate(client->context, client->fh, opts->size);
658 nfs_client_close(client);
659
660out:
661 g_free(client);
662 return ret;
663}
664
Maxim Levitskyb92902d2020-03-26 03:12:17 +0200665static int coroutine_fn nfs_file_co_create_opts(BlockDriver *drv,
666 const char *url,
667 QemuOpts *opts,
Kevin Wolfa1a42af2018-01-31 16:27:38 +0100668 Error **errp)
669{
670 BlockdevCreateOptions *create_options;
671 BlockdevCreateOptionsNfs *nfs_opts;
672 QDict *options;
673 int ret;
674
675 create_options = g_new0(BlockdevCreateOptions, 1);
676 create_options->driver = BLOCKDEV_DRIVER_NFS;
677 nfs_opts = &create_options->u.nfs;
678
Peter Lieven6542aa92014-02-03 10:26:13 +0100679 /* Read out options */
Kevin Wolfa1a42af2018-01-31 16:27:38 +0100680 nfs_opts->size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
681 BDRV_SECTOR_SIZE);
Peter Lieven6542aa92014-02-03 10:26:13 +0100682
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530683 options = qdict_new();
684 ret = nfs_parse_uri(url, options, errp);
685 if (ret < 0) {
686 goto out;
687 }
688
Kevin Wolfa1a42af2018-01-31 16:27:38 +0100689 nfs_opts->location = nfs_options_qdict_to_qapi(options, errp);
690 if (nfs_opts->location == NULL) {
691 ret = -EINVAL;
692 goto out;
693 }
694
695 ret = nfs_file_co_create(create_options, errp);
Peter Lieven6542aa92014-02-03 10:26:13 +0100696 if (ret < 0) {
697 goto out;
698 }
Kevin Wolfa1a42af2018-01-31 16:27:38 +0100699
700 ret = 0;
Peter Lieven6542aa92014-02-03 10:26:13 +0100701out:
Marc-André Lureaucb3e7f02018-04-19 17:01:43 +0200702 qobject_unref(options);
Kevin Wolfa1a42af2018-01-31 16:27:38 +0100703 qapi_free_BlockdevCreateOptions(create_options);
Peter Lieven6542aa92014-02-03 10:26:13 +0100704 return ret;
705}
706
707static int nfs_has_zero_init(BlockDriverState *bs)
708{
709 NFSClient *client = bs->opaque;
710 return client->has_zero_init;
711}
712
Yonggang Luoc63b0202020-11-05 20:31:15 +0800713#if !defined(_WIN32)
Paolo Bonzini37d1e4d2017-02-22 19:07:24 +0100714/* Called (via nfs_service) with QemuMutex held. */
Paolo Bonzinid7464272016-10-27 12:48:57 +0200715static void
716nfs_get_allocated_file_size_cb(int ret, struct nfs_context *nfs, void *data,
717 void *private_data)
718{
719 NFSRPC *task = private_data;
720 task->ret = ret;
721 if (task->ret == 0) {
722 memcpy(task->st, data, sizeof(struct stat));
723 }
724 if (task->ret < 0) {
725 error_report("NFS Error: %s", nfs_get_error(nfs));
726 }
Paolo Bonzinie2a6ae72017-06-05 14:38:54 +0200727
728 /* Set task->complete before reading bs->wakeup. */
Stefan Hajnoczid73415a2020-09-23 11:56:46 +0100729 qatomic_mb_set(&task->complete, 1);
Paolo Bonzinic9d1a562016-10-27 12:49:05 +0200730 bdrv_wakeup(task->bs);
Paolo Bonzinid7464272016-10-27 12:48:57 +0200731}
732
Peter Lieven6542aa92014-02-03 10:26:13 +0100733static int64_t nfs_get_allocated_file_size(BlockDriverState *bs)
734{
735 NFSClient *client = bs->opaque;
736 NFSRPC task = {0};
737 struct stat st;
738
Peter Lieven18a80562015-08-27 12:30:41 +0200739 if (bdrv_is_read_only(bs) &&
740 !(bs->open_flags & BDRV_O_NOCACHE)) {
741 return client->st_blocks * 512;
742 }
743
Paolo Bonzinid7464272016-10-27 12:48:57 +0200744 task.bs = bs;
Peter Lieven6542aa92014-02-03 10:26:13 +0100745 task.st = &st;
Paolo Bonzinid7464272016-10-27 12:48:57 +0200746 if (nfs_fstat_async(client->context, client->fh, nfs_get_allocated_file_size_cb,
Peter Lieven6542aa92014-02-03 10:26:13 +0100747 &task) != 0) {
748 return -ENOMEM;
749 }
750
Paolo Bonziniaa92d6c2016-10-27 12:48:56 +0200751 nfs_set_events(client);
Paolo Bonzinid7464272016-10-27 12:48:57 +0200752 BDRV_POLL_WHILE(bs, !task.complete);
Peter Lieven6542aa92014-02-03 10:26:13 +0100753
Peter Lieven055c6f92015-08-20 12:46:47 +0200754 return (task.ret < 0 ? task.ret : st.st_blocks * 512);
Peter Lieven6542aa92014-02-03 10:26:13 +0100755}
Yonggang Luoc63b0202020-11-05 20:31:15 +0800756#endif
Peter Lieven6542aa92014-02-03 10:26:13 +0100757
Kevin Wolf061ca8a2018-06-21 17:54:35 +0200758static int coroutine_fn
Max Reitzc80d8b02019-09-18 11:51:40 +0200759nfs_file_co_truncate(BlockDriverState *bs, int64_t offset, bool exact,
Kevin Wolf92b92792020-04-24 14:54:39 +0200760 PreallocMode prealloc, BdrvRequestFlags flags,
761 Error **errp)
Peter Lieven6542aa92014-02-03 10:26:13 +0100762{
763 NFSClient *client = bs->opaque;
Max Reitzf59adb32017-03-28 22:51:29 +0200764 int ret;
765
Max Reitz8243ccb2017-06-13 22:20:52 +0200766 if (prealloc != PREALLOC_MODE_OFF) {
767 error_setg(errp, "Unsupported preallocation mode '%s'",
Markus Armbruster977c7362017-08-24 10:46:08 +0200768 PreallocMode_str(prealloc));
Max Reitz8243ccb2017-06-13 22:20:52 +0200769 return -ENOTSUP;
770 }
771
Max Reitzf59adb32017-03-28 22:51:29 +0200772 ret = nfs_ftruncate(client->context, client->fh, offset);
773 if (ret < 0) {
774 error_setg_errno(errp, -ret, "Failed to truncate file");
775 return ret;
776 }
777
778 return 0;
Peter Lieven6542aa92014-02-03 10:26:13 +0100779}
780
Peter Lieven18a80562015-08-27 12:30:41 +0200781/* Note that this will not re-establish a connection with the NFS server
782 * - it is effectively a NOP. */
783static int nfs_reopen_prepare(BDRVReopenState *state,
784 BlockReopenQueue *queue, Error **errp)
785{
786 NFSClient *client = state->bs->opaque;
787 struct stat st;
788 int ret = 0;
789
790 if (state->flags & BDRV_O_RDWR && bdrv_is_read_only(state->bs)) {
791 error_setg(errp, "Cannot open a read-only mount as read-write");
792 return -EACCES;
793 }
794
Peter Lieven38f8d5e2016-05-19 14:48:02 +0200795 if ((state->flags & BDRV_O_NOCACHE) && client->cache_used) {
Peter Lievend99b26c2016-05-19 14:48:03 +0200796 error_setg(errp, "Cannot disable cache if libnfs readahead or"
797 " pagecache is enabled");
Peter Lieven38f8d5e2016-05-19 14:48:02 +0200798 return -EINVAL;
799 }
800
Peter Lieven18a80562015-08-27 12:30:41 +0200801 /* Update cache for read-only reopens */
802 if (!(state->flags & BDRV_O_RDWR)) {
803 ret = nfs_fstat(client->context, client->fh, &st);
804 if (ret < 0) {
805 error_setg(errp, "Failed to fstat file: %s",
806 nfs_get_error(client->context));
807 return ret;
808 }
Yonggang Luoc63b0202020-11-05 20:31:15 +0800809#if !defined(_WIN32)
Peter Lieven18a80562015-08-27 12:30:41 +0200810 client->st_blocks = st.st_blocks;
Yonggang Luoc63b0202020-11-05 20:31:15 +0800811#endif
Peter Lieven18a80562015-08-27 12:30:41 +0200812 }
813
814 return 0;
815}
816
Max Reitz998b3a12019-02-01 20:29:28 +0100817static void nfs_refresh_filename(BlockDriverState *bs)
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530818{
819 NFSClient *client = bs->opaque;
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530820
821 if (client->uid && !client->gid) {
822 snprintf(bs->exact_filename, sizeof(bs->exact_filename),
823 "nfs://%s%s?uid=%" PRId64, client->server->host, client->path,
824 client->uid);
825 } else if (!client->uid && client->gid) {
826 snprintf(bs->exact_filename, sizeof(bs->exact_filename),
827 "nfs://%s%s?gid=%" PRId64, client->server->host, client->path,
828 client->gid);
829 } else if (client->uid && client->gid) {
830 snprintf(bs->exact_filename, sizeof(bs->exact_filename),
831 "nfs://%s%s?uid=%" PRId64 "&gid=%" PRId64,
832 client->server->host, client->path, client->uid, client->gid);
833 } else {
834 snprintf(bs->exact_filename, sizeof(bs->exact_filename),
835 "nfs://%s%s", client->server->host, client->path);
836 }
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530837}
838
Max Reitz0dcbc542019-02-01 20:29:22 +0100839static char *nfs_dirname(BlockDriverState *bs, Error **errp)
840{
841 NFSClient *client = bs->opaque;
842
843 if (client->uid || client->gid) {
844 bdrv_refresh_filename(bs);
845 error_setg(errp, "Cannot generate a base directory for NFS node '%s'",
846 bs->filename);
847 return NULL;
848 }
849
850 return g_strdup_printf("nfs://%s%s/", client->server->host, client->path);
851}
852
Peter Lievend99b26c2016-05-19 14:48:03 +0200853#ifdef LIBNFS_FEATURE_PAGECACHE
Paolo Bonzini2b148f32018-03-01 17:36:18 +0100854static void coroutine_fn nfs_co_invalidate_cache(BlockDriverState *bs,
855 Error **errp)
Peter Lievend99b26c2016-05-19 14:48:03 +0200856{
857 NFSClient *client = bs->opaque;
858 nfs_pagecache_invalidate(client->context, client->fh);
859}
860#endif
861
Max Reitz26542672019-02-01 20:29:25 +0100862static const char *nfs_strong_runtime_opts[] = {
863 "path",
864 "user",
865 "group",
866 "server.",
867
868 NULL
869};
870
Peter Lieven6542aa92014-02-03 10:26:13 +0100871static BlockDriver bdrv_nfs = {
Stefan Hajnoczi471799d2014-05-08 16:34:44 +0200872 .format_name = "nfs",
873 .protocol_name = "nfs",
Peter Lieven6542aa92014-02-03 10:26:13 +0100874
Stefan Hajnoczi471799d2014-05-08 16:34:44 +0200875 .instance_size = sizeof(NFSClient),
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530876 .bdrv_parse_filename = nfs_parse_filename,
Max Reitzfd752802014-12-02 18:32:44 +0100877 .create_opts = &nfs_create_opts,
878
Stefan Hajnoczi471799d2014-05-08 16:34:44 +0200879 .bdrv_has_zero_init = nfs_has_zero_init,
Yonggang Luoc63b0202020-11-05 20:31:15 +0800880/* libnfs does not provide the allocated filesize of a file on win32. */
881#if !defined(_WIN32)
Stefan Hajnoczi471799d2014-05-08 16:34:44 +0200882 .bdrv_get_allocated_file_size = nfs_get_allocated_file_size,
Yonggang Luoc63b0202020-11-05 20:31:15 +0800883#endif
Kevin Wolf061ca8a2018-06-21 17:54:35 +0200884 .bdrv_co_truncate = nfs_file_co_truncate,
Peter Lieven6542aa92014-02-03 10:26:13 +0100885
Stefan Hajnoczi471799d2014-05-08 16:34:44 +0200886 .bdrv_file_open = nfs_file_open,
887 .bdrv_close = nfs_file_close,
Kevin Wolfa1a42af2018-01-31 16:27:38 +0100888 .bdrv_co_create = nfs_file_co_create,
Stefan Hajnocziefc75e22018-01-18 13:43:45 +0100889 .bdrv_co_create_opts = nfs_file_co_create_opts,
Peter Lieven18a80562015-08-27 12:30:41 +0200890 .bdrv_reopen_prepare = nfs_reopen_prepare,
Peter Lieven6542aa92014-02-03 10:26:13 +0100891
Peter Lieven69785a22017-02-17 17:39:00 +0100892 .bdrv_co_preadv = nfs_co_preadv,
893 .bdrv_co_pwritev = nfs_co_pwritev,
Stefan Hajnoczi471799d2014-05-08 16:34:44 +0200894 .bdrv_co_flush_to_disk = nfs_co_flush,
895
896 .bdrv_detach_aio_context = nfs_detach_aio_context,
897 .bdrv_attach_aio_context = nfs_attach_aio_context,
Ashijeet Acharya94d6a7a2016-10-31 20:35:49 +0530898 .bdrv_refresh_filename = nfs_refresh_filename,
Max Reitz0dcbc542019-02-01 20:29:22 +0100899 .bdrv_dirname = nfs_dirname,
Peter Lievend99b26c2016-05-19 14:48:03 +0200900
Max Reitz26542672019-02-01 20:29:25 +0100901 .strong_runtime_opts = nfs_strong_runtime_opts,
902
Peter Lievend99b26c2016-05-19 14:48:03 +0200903#ifdef LIBNFS_FEATURE_PAGECACHE
Paolo Bonzini2b148f32018-03-01 17:36:18 +0100904 .bdrv_co_invalidate_cache = nfs_co_invalidate_cache,
Peter Lievend99b26c2016-05-19 14:48:03 +0200905#endif
Peter Lieven6542aa92014-02-03 10:26:13 +0100906};
907
908static void nfs_block_init(void)
909{
910 bdrv_register(&bdrv_nfs);
911}
912
913block_init(nfs_block_init);