16542aa9cSPeter Lieven /* 26542aa9cSPeter Lieven * QEMU Block driver for native access to files on NFS shares 36542aa9cSPeter Lieven * 438f8d5e0SPeter Lieven * Copyright (c) 2014-2016 Peter Lieven <pl@kamp.de> 56542aa9cSPeter Lieven * 66542aa9cSPeter Lieven * Permission is hereby granted, free of charge, to any person obtaining a copy 76542aa9cSPeter Lieven * of this software and associated documentation files (the "Software"), to deal 86542aa9cSPeter Lieven * in the Software without restriction, including without limitation the rights 96542aa9cSPeter Lieven * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 106542aa9cSPeter Lieven * copies of the Software, and to permit persons to whom the Software is 116542aa9cSPeter Lieven * furnished to do so, subject to the following conditions: 126542aa9cSPeter Lieven * 136542aa9cSPeter Lieven * The above copyright notice and this permission notice shall be included in 146542aa9cSPeter Lieven * all copies or substantial portions of the Software. 156542aa9cSPeter Lieven * 166542aa9cSPeter Lieven * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 176542aa9cSPeter Lieven * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 186542aa9cSPeter Lieven * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 196542aa9cSPeter Lieven * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 206542aa9cSPeter Lieven * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 216542aa9cSPeter Lieven * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 226542aa9cSPeter Lieven * THE SOFTWARE. 236542aa9cSPeter Lieven */ 246542aa9cSPeter Lieven 2580c71a24SPeter Maydell #include "qemu/osdep.h" 266542aa9cSPeter Lieven 276542aa9cSPeter Lieven #include <poll.h> 286542aa9cSPeter Lieven #include "qemu-common.h" 296542aa9cSPeter Lieven #include "qemu/config-file.h" 306542aa9cSPeter Lieven #include "qemu/error-report.h" 31d165b8cbSStefan Hajnoczi #include "qapi/error.h" 326542aa9cSPeter Lieven #include "block/block_int.h" 336542aa9cSPeter Lieven #include "trace.h" 346542aa9cSPeter Lieven #include "qemu/iov.h" 356542aa9cSPeter Lieven #include "qemu/uri.h" 360d94b746SStefan Hajnoczi #include "qemu/cutils.h" 376542aa9cSPeter Lieven #include "sysemu/sysemu.h" 3894d6a7a7SAshijeet Acharya #include "qapi/qmp/qdict.h" 3994d6a7a7SAshijeet Acharya #include "qapi/qmp/qint.h" 4094d6a7a7SAshijeet Acharya #include "qapi/qmp/qstring.h" 4194d6a7a7SAshijeet Acharya #include "qapi-visit.h" 4294d6a7a7SAshijeet Acharya #include "qapi/qobject-input-visitor.h" 4394d6a7a7SAshijeet Acharya #include "qapi/qobject-output-visitor.h" 446542aa9cSPeter Lieven #include <nfsc/libnfs.h> 456542aa9cSPeter Lieven 4694d6a7a7SAshijeet Acharya 4729c838cdSPeter Lieven #define QEMU_NFS_MAX_READAHEAD_SIZE 1048576 48d99b26c4SPeter Lieven #define QEMU_NFS_MAX_PAGECACHE_SIZE (8388608 / NFS_BLKSIZE) 497725b8bfSPeter Lieven #define QEMU_NFS_MAX_DEBUG_LEVEL 2 5029c838cdSPeter Lieven 516542aa9cSPeter Lieven typedef struct NFSClient { 526542aa9cSPeter Lieven struct nfs_context *context; 536542aa9cSPeter Lieven struct nfsfh *fh; 546542aa9cSPeter Lieven int events; 556542aa9cSPeter Lieven bool has_zero_init; 56471799d1SStefan Hajnoczi AioContext *aio_context; 5737d1e4d9SPaolo Bonzini QemuMutex mutex; 5818a8056eSPeter Lieven blkcnt_t st_blocks; 5938f8d5e0SPeter Lieven bool cache_used; 6094d6a7a7SAshijeet Acharya NFSServer *server; 6194d6a7a7SAshijeet Acharya char *path; 6294d6a7a7SAshijeet Acharya int64_t uid, gid, tcp_syncnt, readahead, pagecache, debug; 636542aa9cSPeter Lieven } NFSClient; 646542aa9cSPeter Lieven 656542aa9cSPeter Lieven typedef struct NFSRPC { 66d746427aSPaolo Bonzini BlockDriverState *bs; 676542aa9cSPeter Lieven int ret; 686542aa9cSPeter Lieven int complete; 696542aa9cSPeter Lieven QEMUIOVector *iov; 706542aa9cSPeter Lieven struct stat *st; 716542aa9cSPeter Lieven Coroutine *co; 72471799d1SStefan Hajnoczi NFSClient *client; 736542aa9cSPeter Lieven } NFSRPC; 746542aa9cSPeter Lieven 7594d6a7a7SAshijeet Acharya static int nfs_parse_uri(const char *filename, QDict *options, Error **errp) 7694d6a7a7SAshijeet Acharya { 7794d6a7a7SAshijeet Acharya URI *uri = NULL; 7894d6a7a7SAshijeet Acharya QueryParams *qp = NULL; 7994d6a7a7SAshijeet Acharya int ret = -EINVAL, i; 8094d6a7a7SAshijeet Acharya 8194d6a7a7SAshijeet Acharya uri = uri_parse(filename); 8294d6a7a7SAshijeet Acharya if (!uri) { 8394d6a7a7SAshijeet Acharya error_setg(errp, "Invalid URI specified"); 8494d6a7a7SAshijeet Acharya goto out; 8594d6a7a7SAshijeet Acharya } 8694d6a7a7SAshijeet Acharya if (strcmp(uri->scheme, "nfs") != 0) { 8794d6a7a7SAshijeet Acharya error_setg(errp, "URI scheme must be 'nfs'"); 8894d6a7a7SAshijeet Acharya goto out; 8994d6a7a7SAshijeet Acharya } 9094d6a7a7SAshijeet Acharya 9194d6a7a7SAshijeet Acharya if (!uri->server) { 9294d6a7a7SAshijeet Acharya error_setg(errp, "missing hostname in URI"); 9394d6a7a7SAshijeet Acharya goto out; 9494d6a7a7SAshijeet Acharya } 9594d6a7a7SAshijeet Acharya 9694d6a7a7SAshijeet Acharya if (!uri->path) { 9794d6a7a7SAshijeet Acharya error_setg(errp, "missing file path in URI"); 9894d6a7a7SAshijeet Acharya goto out; 9994d6a7a7SAshijeet Acharya } 10094d6a7a7SAshijeet Acharya 10194d6a7a7SAshijeet Acharya qp = query_params_parse(uri->query); 10294d6a7a7SAshijeet Acharya if (!qp) { 10394d6a7a7SAshijeet Acharya error_setg(errp, "could not parse query parameters"); 10494d6a7a7SAshijeet Acharya goto out; 10594d6a7a7SAshijeet Acharya } 10694d6a7a7SAshijeet Acharya 10746f5ac20SEric Blake qdict_put_str(options, "server.host", uri->server); 10846f5ac20SEric Blake qdict_put_str(options, "server.type", "inet"); 10946f5ac20SEric Blake qdict_put_str(options, "path", uri->path); 11094d6a7a7SAshijeet Acharya 11194d6a7a7SAshijeet Acharya for (i = 0; i < qp->n; i++) { 1128d20abe8SPeter Lieven unsigned long long val; 11394d6a7a7SAshijeet Acharya if (!qp->p[i].value) { 11494d6a7a7SAshijeet Acharya error_setg(errp, "Value for NFS parameter expected: %s", 11594d6a7a7SAshijeet Acharya qp->p[i].name); 11694d6a7a7SAshijeet Acharya goto out; 11794d6a7a7SAshijeet Acharya } 1188d20abe8SPeter Lieven if (parse_uint_full(qp->p[i].value, &val, 0)) { 11994d6a7a7SAshijeet Acharya error_setg(errp, "Illegal value for NFS parameter: %s", 12094d6a7a7SAshijeet Acharya qp->p[i].name); 12194d6a7a7SAshijeet Acharya goto out; 12294d6a7a7SAshijeet Acharya } 12394d6a7a7SAshijeet Acharya if (!strcmp(qp->p[i].name, "uid")) { 12446f5ac20SEric Blake qdict_put_str(options, "user", qp->p[i].value); 12594d6a7a7SAshijeet Acharya } else if (!strcmp(qp->p[i].name, "gid")) { 12646f5ac20SEric Blake qdict_put_str(options, "group", qp->p[i].value); 12794d6a7a7SAshijeet Acharya } else if (!strcmp(qp->p[i].name, "tcp-syncnt")) { 12846f5ac20SEric Blake qdict_put_str(options, "tcp-syn-count", qp->p[i].value); 12994d6a7a7SAshijeet Acharya } else if (!strcmp(qp->p[i].name, "readahead")) { 13046f5ac20SEric Blake qdict_put_str(options, "readahead-size", qp->p[i].value); 13194d6a7a7SAshijeet Acharya } else if (!strcmp(qp->p[i].name, "pagecache")) { 13246f5ac20SEric Blake qdict_put_str(options, "page-cache-size", qp->p[i].value); 13394d6a7a7SAshijeet Acharya } else if (!strcmp(qp->p[i].name, "debug")) { 13446f5ac20SEric Blake qdict_put_str(options, "debug", qp->p[i].value); 13594d6a7a7SAshijeet Acharya } else { 13694d6a7a7SAshijeet Acharya error_setg(errp, "Unknown NFS parameter name: %s", 13794d6a7a7SAshijeet Acharya qp->p[i].name); 13894d6a7a7SAshijeet Acharya goto out; 13994d6a7a7SAshijeet Acharya } 14094d6a7a7SAshijeet Acharya } 14194d6a7a7SAshijeet Acharya ret = 0; 14294d6a7a7SAshijeet Acharya out: 14394d6a7a7SAshijeet Acharya if (qp) { 14494d6a7a7SAshijeet Acharya query_params_free(qp); 14594d6a7a7SAshijeet Acharya } 14694d6a7a7SAshijeet Acharya if (uri) { 14794d6a7a7SAshijeet Acharya uri_free(uri); 14894d6a7a7SAshijeet Acharya } 14994d6a7a7SAshijeet Acharya return ret; 15094d6a7a7SAshijeet Acharya } 15194d6a7a7SAshijeet Acharya 15294d6a7a7SAshijeet Acharya static bool nfs_has_filename_options_conflict(QDict *options, Error **errp) 15394d6a7a7SAshijeet Acharya { 15494d6a7a7SAshijeet Acharya const QDictEntry *qe; 15594d6a7a7SAshijeet Acharya 15694d6a7a7SAshijeet Acharya for (qe = qdict_first(options); qe; qe = qdict_next(options, qe)) { 15794d6a7a7SAshijeet Acharya if (!strcmp(qe->key, "host") || 15894d6a7a7SAshijeet Acharya !strcmp(qe->key, "path") || 15994d6a7a7SAshijeet Acharya !strcmp(qe->key, "user") || 16094d6a7a7SAshijeet Acharya !strcmp(qe->key, "group") || 16194d6a7a7SAshijeet Acharya !strcmp(qe->key, "tcp-syn-count") || 16294d6a7a7SAshijeet Acharya !strcmp(qe->key, "readahead-size") || 16394d6a7a7SAshijeet Acharya !strcmp(qe->key, "page-cache-size") || 1647103d916SPrasanna Kumar Kalever !strcmp(qe->key, "debug") || 16594d6a7a7SAshijeet Acharya strstart(qe->key, "server.", NULL)) 16694d6a7a7SAshijeet Acharya { 16794d6a7a7SAshijeet Acharya error_setg(errp, "Option %s cannot be used with a filename", 16894d6a7a7SAshijeet Acharya qe->key); 16994d6a7a7SAshijeet Acharya return true; 17094d6a7a7SAshijeet Acharya } 17194d6a7a7SAshijeet Acharya } 17294d6a7a7SAshijeet Acharya 17394d6a7a7SAshijeet Acharya return false; 17494d6a7a7SAshijeet Acharya } 17594d6a7a7SAshijeet Acharya 17694d6a7a7SAshijeet Acharya static void nfs_parse_filename(const char *filename, QDict *options, 17794d6a7a7SAshijeet Acharya Error **errp) 17894d6a7a7SAshijeet Acharya { 17994d6a7a7SAshijeet Acharya if (nfs_has_filename_options_conflict(options, errp)) { 18094d6a7a7SAshijeet Acharya return; 18194d6a7a7SAshijeet Acharya } 18294d6a7a7SAshijeet Acharya 18394d6a7a7SAshijeet Acharya nfs_parse_uri(filename, options, errp); 18494d6a7a7SAshijeet Acharya } 18594d6a7a7SAshijeet Acharya 1866542aa9cSPeter Lieven static void nfs_process_read(void *arg); 1876542aa9cSPeter Lieven static void nfs_process_write(void *arg); 1886542aa9cSPeter Lieven 18937d1e4d9SPaolo Bonzini /* Called with QemuMutex held. */ 1906542aa9cSPeter Lieven static void nfs_set_events(NFSClient *client) 1916542aa9cSPeter Lieven { 1926542aa9cSPeter Lieven int ev = nfs_which_events(client->context); 1936542aa9cSPeter Lieven if (ev != client->events) { 194dca21ef2SFam Zheng aio_set_fd_handler(client->aio_context, nfs_get_fd(client->context), 195dca21ef2SFam Zheng false, 1966542aa9cSPeter Lieven (ev & POLLIN) ? nfs_process_read : NULL, 197f6a51c84SStefan Hajnoczi (ev & POLLOUT) ? nfs_process_write : NULL, 198f6a51c84SStefan Hajnoczi NULL, client); 1996542aa9cSPeter Lieven 2006542aa9cSPeter Lieven } 2016542aa9cSPeter Lieven client->events = ev; 2026542aa9cSPeter Lieven } 2036542aa9cSPeter Lieven 2046542aa9cSPeter Lieven static void nfs_process_read(void *arg) 2056542aa9cSPeter Lieven { 2066542aa9cSPeter Lieven NFSClient *client = arg; 2079d456654SPaolo Bonzini 20837d1e4d9SPaolo Bonzini qemu_mutex_lock(&client->mutex); 2096542aa9cSPeter Lieven nfs_service(client->context, POLLIN); 2106542aa9cSPeter Lieven nfs_set_events(client); 21137d1e4d9SPaolo Bonzini qemu_mutex_unlock(&client->mutex); 2126542aa9cSPeter Lieven } 2136542aa9cSPeter Lieven 2146542aa9cSPeter Lieven static void nfs_process_write(void *arg) 2156542aa9cSPeter Lieven { 2166542aa9cSPeter Lieven NFSClient *client = arg; 2179d456654SPaolo Bonzini 21837d1e4d9SPaolo Bonzini qemu_mutex_lock(&client->mutex); 2196542aa9cSPeter Lieven nfs_service(client->context, POLLOUT); 2206542aa9cSPeter Lieven nfs_set_events(client); 22137d1e4d9SPaolo Bonzini qemu_mutex_unlock(&client->mutex); 2226542aa9cSPeter Lieven } 2236542aa9cSPeter Lieven 224d746427aSPaolo Bonzini static void nfs_co_init_task(BlockDriverState *bs, NFSRPC *task) 2256542aa9cSPeter Lieven { 2266542aa9cSPeter Lieven *task = (NFSRPC) { 2276542aa9cSPeter Lieven .co = qemu_coroutine_self(), 228d746427aSPaolo Bonzini .bs = bs, 229d746427aSPaolo Bonzini .client = bs->opaque, 2306542aa9cSPeter Lieven }; 2316542aa9cSPeter Lieven } 2326542aa9cSPeter Lieven 2336542aa9cSPeter Lieven static void nfs_co_generic_bh_cb(void *opaque) 2346542aa9cSPeter Lieven { 2356542aa9cSPeter Lieven NFSRPC *task = opaque; 2361919631eSPaolo Bonzini 237a2c0fe2fSPeter Lieven task->complete = 1; 2381919631eSPaolo Bonzini aio_co_wake(task->co); 2396542aa9cSPeter Lieven } 2406542aa9cSPeter Lieven 24137d1e4d9SPaolo Bonzini /* Called (via nfs_service) with QemuMutex held. */ 2426542aa9cSPeter Lieven static void 2436542aa9cSPeter Lieven nfs_co_generic_cb(int ret, struct nfs_context *nfs, void *data, 2446542aa9cSPeter Lieven void *private_data) 2456542aa9cSPeter Lieven { 2466542aa9cSPeter Lieven NFSRPC *task = private_data; 2476542aa9cSPeter Lieven task->ret = ret; 248d746427aSPaolo Bonzini assert(!task->st); 2496542aa9cSPeter Lieven if (task->ret > 0 && task->iov) { 2506542aa9cSPeter Lieven if (task->ret <= task->iov->size) { 2516542aa9cSPeter Lieven qemu_iovec_from_buf(task->iov, 0, data, task->ret); 2526542aa9cSPeter Lieven } else { 2536542aa9cSPeter Lieven task->ret = -EIO; 2546542aa9cSPeter Lieven } 2556542aa9cSPeter Lieven } 25620fccb18SPeter Lieven if (task->ret < 0) { 25720fccb18SPeter Lieven error_report("NFS Error: %s", nfs_get_error(nfs)); 25820fccb18SPeter Lieven } 259fffb6e12SPaolo Bonzini aio_bh_schedule_oneshot(task->client->aio_context, 260471799d1SStefan Hajnoczi nfs_co_generic_bh_cb, task); 2616542aa9cSPeter Lieven } 2626542aa9cSPeter Lieven 26369785a22SPeter Lieven static int coroutine_fn nfs_co_preadv(BlockDriverState *bs, uint64_t offset, 26469785a22SPeter Lieven uint64_t bytes, QEMUIOVector *iov, 26569785a22SPeter Lieven int flags) 2666542aa9cSPeter Lieven { 2676542aa9cSPeter Lieven NFSClient *client = bs->opaque; 2686542aa9cSPeter Lieven NFSRPC task; 2696542aa9cSPeter Lieven 270d746427aSPaolo Bonzini nfs_co_init_task(bs, &task); 2716542aa9cSPeter Lieven task.iov = iov; 2726542aa9cSPeter Lieven 27337d1e4d9SPaolo Bonzini qemu_mutex_lock(&client->mutex); 2746542aa9cSPeter Lieven if (nfs_pread_async(client->context, client->fh, 27569785a22SPeter Lieven offset, bytes, nfs_co_generic_cb, &task) != 0) { 27637d1e4d9SPaolo Bonzini qemu_mutex_unlock(&client->mutex); 2776542aa9cSPeter Lieven return -ENOMEM; 2786542aa9cSPeter Lieven } 2796542aa9cSPeter Lieven 2806542aa9cSPeter Lieven nfs_set_events(client); 28137d1e4d9SPaolo Bonzini qemu_mutex_unlock(&client->mutex); 282aa92d6c4SPaolo Bonzini while (!task.complete) { 2836542aa9cSPeter Lieven qemu_coroutine_yield(); 2846542aa9cSPeter Lieven } 2856542aa9cSPeter Lieven 2866542aa9cSPeter Lieven if (task.ret < 0) { 2876542aa9cSPeter Lieven return task.ret; 2886542aa9cSPeter Lieven } 2896542aa9cSPeter Lieven 2906542aa9cSPeter Lieven /* zero pad short reads */ 2916542aa9cSPeter Lieven if (task.ret < iov->size) { 2926542aa9cSPeter Lieven qemu_iovec_memset(iov, task.ret, 0, iov->size - task.ret); 2936542aa9cSPeter Lieven } 2946542aa9cSPeter Lieven 2956542aa9cSPeter Lieven return 0; 2966542aa9cSPeter Lieven } 2976542aa9cSPeter Lieven 29869785a22SPeter Lieven static int coroutine_fn nfs_co_pwritev(BlockDriverState *bs, uint64_t offset, 29969785a22SPeter Lieven uint64_t bytes, QEMUIOVector *iov, 30069785a22SPeter Lieven int flags) 3016542aa9cSPeter Lieven { 3026542aa9cSPeter Lieven NFSClient *client = bs->opaque; 3036542aa9cSPeter Lieven NFSRPC task; 3046542aa9cSPeter Lieven char *buf = NULL; 305ef503a84SPeter Lieven bool my_buffer = false; 3066542aa9cSPeter Lieven 307d746427aSPaolo Bonzini nfs_co_init_task(bs, &task); 3086542aa9cSPeter Lieven 309ef503a84SPeter Lieven if (iov->niov != 1) { 31069785a22SPeter Lieven buf = g_try_malloc(bytes); 31169785a22SPeter Lieven if (bytes && buf == NULL) { 3122347dd7bSKevin Wolf return -ENOMEM; 3132347dd7bSKevin Wolf } 31469785a22SPeter Lieven qemu_iovec_to_buf(iov, 0, buf, bytes); 315ef503a84SPeter Lieven my_buffer = true; 316ef503a84SPeter Lieven } else { 317ef503a84SPeter Lieven buf = iov->iov[0].iov_base; 318ef503a84SPeter Lieven } 3196542aa9cSPeter Lieven 32037d1e4d9SPaolo Bonzini qemu_mutex_lock(&client->mutex); 3216542aa9cSPeter Lieven if (nfs_pwrite_async(client->context, client->fh, 32269785a22SPeter Lieven offset, bytes, buf, 32369785a22SPeter Lieven nfs_co_generic_cb, &task) != 0) { 32437d1e4d9SPaolo Bonzini qemu_mutex_unlock(&client->mutex); 325ef503a84SPeter Lieven if (my_buffer) { 3266542aa9cSPeter Lieven g_free(buf); 327ef503a84SPeter Lieven } 3286542aa9cSPeter Lieven return -ENOMEM; 3296542aa9cSPeter Lieven } 3306542aa9cSPeter Lieven 3316542aa9cSPeter Lieven nfs_set_events(client); 33237d1e4d9SPaolo Bonzini qemu_mutex_unlock(&client->mutex); 333aa92d6c4SPaolo Bonzini while (!task.complete) { 3346542aa9cSPeter Lieven qemu_coroutine_yield(); 3356542aa9cSPeter Lieven } 3366542aa9cSPeter Lieven 337ef503a84SPeter Lieven if (my_buffer) { 3386542aa9cSPeter Lieven g_free(buf); 339ef503a84SPeter Lieven } 3406542aa9cSPeter Lieven 34169785a22SPeter Lieven if (task.ret != bytes) { 3426542aa9cSPeter Lieven return task.ret < 0 ? task.ret : -EIO; 3436542aa9cSPeter Lieven } 3446542aa9cSPeter Lieven 3456542aa9cSPeter Lieven return 0; 3466542aa9cSPeter Lieven } 3476542aa9cSPeter Lieven 3486542aa9cSPeter Lieven static int coroutine_fn nfs_co_flush(BlockDriverState *bs) 3496542aa9cSPeter Lieven { 3506542aa9cSPeter Lieven NFSClient *client = bs->opaque; 3516542aa9cSPeter Lieven NFSRPC task; 3526542aa9cSPeter Lieven 353d746427aSPaolo Bonzini nfs_co_init_task(bs, &task); 3546542aa9cSPeter Lieven 35537d1e4d9SPaolo Bonzini qemu_mutex_lock(&client->mutex); 3566542aa9cSPeter Lieven if (nfs_fsync_async(client->context, client->fh, nfs_co_generic_cb, 3576542aa9cSPeter Lieven &task) != 0) { 35837d1e4d9SPaolo Bonzini qemu_mutex_unlock(&client->mutex); 3596542aa9cSPeter Lieven return -ENOMEM; 3606542aa9cSPeter Lieven } 3616542aa9cSPeter Lieven 3626542aa9cSPeter Lieven nfs_set_events(client); 36337d1e4d9SPaolo Bonzini qemu_mutex_unlock(&client->mutex); 364aa92d6c4SPaolo Bonzini while (!task.complete) { 3656542aa9cSPeter Lieven qemu_coroutine_yield(); 3666542aa9cSPeter Lieven } 3676542aa9cSPeter Lieven 3686542aa9cSPeter Lieven return task.ret; 3696542aa9cSPeter Lieven } 3706542aa9cSPeter Lieven 3716542aa9cSPeter Lieven static QemuOptsList runtime_opts = { 3726542aa9cSPeter Lieven .name = "nfs", 3736542aa9cSPeter Lieven .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), 3746542aa9cSPeter Lieven .desc = { 3756542aa9cSPeter Lieven { 37694d6a7a7SAshijeet Acharya .name = "path", 3776542aa9cSPeter Lieven .type = QEMU_OPT_STRING, 37894d6a7a7SAshijeet Acharya .help = "Path of the image on the host", 37994d6a7a7SAshijeet Acharya }, 38094d6a7a7SAshijeet Acharya { 381f67409a5SPeter Lieven .name = "user", 38294d6a7a7SAshijeet Acharya .type = QEMU_OPT_NUMBER, 38394d6a7a7SAshijeet Acharya .help = "UID value to use when talking to the server", 38494d6a7a7SAshijeet Acharya }, 38594d6a7a7SAshijeet Acharya { 386f67409a5SPeter Lieven .name = "group", 38794d6a7a7SAshijeet Acharya .type = QEMU_OPT_NUMBER, 38894d6a7a7SAshijeet Acharya .help = "GID value to use when talking to the server", 38994d6a7a7SAshijeet Acharya }, 39094d6a7a7SAshijeet Acharya { 391f67409a5SPeter Lieven .name = "tcp-syn-count", 39294d6a7a7SAshijeet Acharya .type = QEMU_OPT_NUMBER, 39394d6a7a7SAshijeet Acharya .help = "Number of SYNs to send during the session establish", 39494d6a7a7SAshijeet Acharya }, 39594d6a7a7SAshijeet Acharya { 396f67409a5SPeter Lieven .name = "readahead-size", 39794d6a7a7SAshijeet Acharya .type = QEMU_OPT_NUMBER, 39894d6a7a7SAshijeet Acharya .help = "Set the readahead size in bytes", 39994d6a7a7SAshijeet Acharya }, 40094d6a7a7SAshijeet Acharya { 401f67409a5SPeter Lieven .name = "page-cache-size", 40294d6a7a7SAshijeet Acharya .type = QEMU_OPT_NUMBER, 40394d6a7a7SAshijeet Acharya .help = "Set the pagecache size in bytes", 40494d6a7a7SAshijeet Acharya }, 40594d6a7a7SAshijeet Acharya { 40694d6a7a7SAshijeet Acharya .name = "debug", 40794d6a7a7SAshijeet Acharya .type = QEMU_OPT_NUMBER, 40894d6a7a7SAshijeet Acharya .help = "Set the NFS debug level (max 2)", 4096542aa9cSPeter Lieven }, 4106542aa9cSPeter Lieven { /* end of list */ } 4116542aa9cSPeter Lieven }, 4126542aa9cSPeter Lieven }; 4136542aa9cSPeter Lieven 414471799d1SStefan Hajnoczi static void nfs_detach_aio_context(BlockDriverState *bs) 415471799d1SStefan Hajnoczi { 416471799d1SStefan Hajnoczi NFSClient *client = bs->opaque; 417471799d1SStefan Hajnoczi 418dca21ef2SFam Zheng aio_set_fd_handler(client->aio_context, nfs_get_fd(client->context), 419f6a51c84SStefan Hajnoczi false, NULL, NULL, NULL, NULL); 420471799d1SStefan Hajnoczi client->events = 0; 421471799d1SStefan Hajnoczi } 422471799d1SStefan Hajnoczi 423471799d1SStefan Hajnoczi static void nfs_attach_aio_context(BlockDriverState *bs, 424471799d1SStefan Hajnoczi AioContext *new_context) 425471799d1SStefan Hajnoczi { 426471799d1SStefan Hajnoczi NFSClient *client = bs->opaque; 427471799d1SStefan Hajnoczi 428471799d1SStefan Hajnoczi client->aio_context = new_context; 429471799d1SStefan Hajnoczi nfs_set_events(client); 430471799d1SStefan Hajnoczi } 431471799d1SStefan Hajnoczi 4326542aa9cSPeter Lieven static void nfs_client_close(NFSClient *client) 4336542aa9cSPeter Lieven { 4346542aa9cSPeter Lieven if (client->context) { 4356542aa9cSPeter Lieven if (client->fh) { 4366542aa9cSPeter Lieven nfs_close(client->context, client->fh); 4376542aa9cSPeter Lieven } 438dca21ef2SFam Zheng aio_set_fd_handler(client->aio_context, nfs_get_fd(client->context), 439f6a51c84SStefan Hajnoczi false, NULL, NULL, NULL, NULL); 4406542aa9cSPeter Lieven nfs_destroy_context(client->context); 4416542aa9cSPeter Lieven } 4426542aa9cSPeter Lieven memset(client, 0, sizeof(NFSClient)); 4436542aa9cSPeter Lieven } 4446542aa9cSPeter Lieven 4456542aa9cSPeter Lieven static void nfs_file_close(BlockDriverState *bs) 4466542aa9cSPeter Lieven { 4476542aa9cSPeter Lieven NFSClient *client = bs->opaque; 4486542aa9cSPeter Lieven nfs_client_close(client); 44937d1e4d9SPaolo Bonzini qemu_mutex_destroy(&client->mutex); 4506542aa9cSPeter Lieven } 4516542aa9cSPeter Lieven 45294d6a7a7SAshijeet Acharya static NFSServer *nfs_config(QDict *options, Error **errp) 45394d6a7a7SAshijeet Acharya { 45494d6a7a7SAshijeet Acharya NFSServer *server = NULL; 45594d6a7a7SAshijeet Acharya QDict *addr = NULL; 45694d6a7a7SAshijeet Acharya QObject *crumpled_addr = NULL; 45794d6a7a7SAshijeet Acharya Visitor *iv = NULL; 45894d6a7a7SAshijeet Acharya Error *local_error = NULL; 45994d6a7a7SAshijeet Acharya 46094d6a7a7SAshijeet Acharya qdict_extract_subqdict(options, &addr, "server."); 46194d6a7a7SAshijeet Acharya if (!qdict_size(addr)) { 46294d6a7a7SAshijeet Acharya error_setg(errp, "NFS server address missing"); 46394d6a7a7SAshijeet Acharya goto out; 46494d6a7a7SAshijeet Acharya } 46594d6a7a7SAshijeet Acharya 46694d6a7a7SAshijeet Acharya crumpled_addr = qdict_crumple(addr, errp); 46794d6a7a7SAshijeet Acharya if (!crumpled_addr) { 46894d6a7a7SAshijeet Acharya goto out; 46994d6a7a7SAshijeet Acharya } 47094d6a7a7SAshijeet Acharya 471129c7d1cSMarkus Armbruster /* 472129c7d1cSMarkus Armbruster * Caution: this works only because all scalar members of 473129c7d1cSMarkus Armbruster * NFSServer are QString in @crumpled_addr. The visitor expects 474129c7d1cSMarkus Armbruster * @crumpled_addr to be typed according to the QAPI schema. It 475129c7d1cSMarkus Armbruster * is when @options come from -blockdev or blockdev_add. But when 476129c7d1cSMarkus Armbruster * they come from -drive, they're all QString. 477129c7d1cSMarkus Armbruster */ 478048abb7bSMarkus Armbruster iv = qobject_input_visitor_new(crumpled_addr); 47994d6a7a7SAshijeet Acharya visit_type_NFSServer(iv, NULL, &server, &local_error); 48094d6a7a7SAshijeet Acharya if (local_error) { 48194d6a7a7SAshijeet Acharya error_propagate(errp, local_error); 48294d6a7a7SAshijeet Acharya goto out; 48394d6a7a7SAshijeet Acharya } 48494d6a7a7SAshijeet Acharya 48594d6a7a7SAshijeet Acharya out: 48694d6a7a7SAshijeet Acharya QDECREF(addr); 48794d6a7a7SAshijeet Acharya qobject_decref(crumpled_addr); 48894d6a7a7SAshijeet Acharya visit_free(iv); 48994d6a7a7SAshijeet Acharya return server; 49094d6a7a7SAshijeet Acharya } 49194d6a7a7SAshijeet Acharya 49294d6a7a7SAshijeet Acharya 49394d6a7a7SAshijeet Acharya static int64_t nfs_client_open(NFSClient *client, QDict *options, 494cb8d4bf6SFam Zheng int flags, int open_flags, Error **errp) 4956542aa9cSPeter Lieven { 49694d6a7a7SAshijeet Acharya int ret = -EINVAL; 49794d6a7a7SAshijeet Acharya QemuOpts *opts = NULL; 49894d6a7a7SAshijeet Acharya Error *local_err = NULL; 4996542aa9cSPeter Lieven struct stat st; 5006542aa9cSPeter Lieven char *file = NULL, *strp = NULL; 5016542aa9cSPeter Lieven 50294d6a7a7SAshijeet Acharya opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort); 50394d6a7a7SAshijeet Acharya qemu_opts_absorb_qdict(opts, options, &local_err); 50494d6a7a7SAshijeet Acharya if (local_err) { 50594d6a7a7SAshijeet Acharya error_propagate(errp, local_err); 50694d6a7a7SAshijeet Acharya ret = -EINVAL; 5076542aa9cSPeter Lieven goto fail; 5086542aa9cSPeter Lieven } 50994d6a7a7SAshijeet Acharya 51094d6a7a7SAshijeet Acharya client->path = g_strdup(qemu_opt_get(opts, "path")); 51194d6a7a7SAshijeet Acharya if (!client->path) { 51294d6a7a7SAshijeet Acharya ret = -EINVAL; 51394d6a7a7SAshijeet Acharya error_setg(errp, "No path was specified"); 5145f4d5e1aSMax Reitz goto fail; 5155f4d5e1aSMax Reitz } 51694d6a7a7SAshijeet Acharya 51794d6a7a7SAshijeet Acharya strp = strrchr(client->path, '/'); 5186542aa9cSPeter Lieven if (strp == NULL) { 5196542aa9cSPeter Lieven error_setg(errp, "Invalid URL specified"); 5206542aa9cSPeter Lieven goto fail; 5216542aa9cSPeter Lieven } 5226542aa9cSPeter Lieven file = g_strdup(strp); 5236542aa9cSPeter Lieven *strp = 0; 5246542aa9cSPeter Lieven 52594d6a7a7SAshijeet Acharya /* Pop the config into our state object, Exit if invalid */ 52694d6a7a7SAshijeet Acharya client->server = nfs_config(options, errp); 52794d6a7a7SAshijeet Acharya if (!client->server) { 52894d6a7a7SAshijeet Acharya ret = -EINVAL; 52994d6a7a7SAshijeet Acharya goto fail; 53094d6a7a7SAshijeet Acharya } 53194d6a7a7SAshijeet Acharya 5326542aa9cSPeter Lieven client->context = nfs_init_context(); 5336542aa9cSPeter Lieven if (client->context == NULL) { 5346542aa9cSPeter Lieven error_setg(errp, "Failed to init NFS context"); 5356542aa9cSPeter Lieven goto fail; 5366542aa9cSPeter Lieven } 5376542aa9cSPeter Lieven 538f67409a5SPeter Lieven if (qemu_opt_get(opts, "user")) { 539f67409a5SPeter Lieven client->uid = qemu_opt_get_number(opts, "user", 0); 54094d6a7a7SAshijeet Acharya nfs_set_uid(client->context, client->uid); 5416542aa9cSPeter Lieven } 54294d6a7a7SAshijeet Acharya 543f67409a5SPeter Lieven if (qemu_opt_get(opts, "group")) { 544f67409a5SPeter Lieven client->gid = qemu_opt_get_number(opts, "group", 0); 54594d6a7a7SAshijeet Acharya nfs_set_gid(client->context, client->gid); 5467c24384bSPeter Lieven } 54794d6a7a7SAshijeet Acharya 548f67409a5SPeter Lieven if (qemu_opt_get(opts, "tcp-syn-count")) { 549f67409a5SPeter Lieven client->tcp_syncnt = qemu_opt_get_number(opts, "tcp-syn-count", 0); 55094d6a7a7SAshijeet Acharya nfs_set_tcp_syncnt(client->context, client->tcp_syncnt); 55194d6a7a7SAshijeet Acharya } 55294d6a7a7SAshijeet Acharya 553f42ca3caSPeter Lieven #ifdef LIBNFS_FEATURE_READAHEAD 554f67409a5SPeter Lieven if (qemu_opt_get(opts, "readahead-size")) { 55538f8d5e0SPeter Lieven if (open_flags & BDRV_O_NOCACHE) { 55638f8d5e0SPeter Lieven error_setg(errp, "Cannot enable NFS readahead " 55738f8d5e0SPeter Lieven "if cache.direct = on"); 55838f8d5e0SPeter Lieven goto fail; 55938f8d5e0SPeter Lieven } 560f67409a5SPeter Lieven client->readahead = qemu_opt_get_number(opts, "readahead-size", 0); 56194d6a7a7SAshijeet Acharya if (client->readahead > QEMU_NFS_MAX_READAHEAD_SIZE) { 56229c838cdSPeter Lieven error_report("NFS Warning: Truncating NFS readahead " 56329c838cdSPeter Lieven "size to %d", QEMU_NFS_MAX_READAHEAD_SIZE); 56494d6a7a7SAshijeet Acharya client->readahead = QEMU_NFS_MAX_READAHEAD_SIZE; 56529c838cdSPeter Lieven } 56694d6a7a7SAshijeet Acharya nfs_set_readahead(client->context, client->readahead); 567d99b26c4SPeter Lieven #ifdef LIBNFS_FEATURE_PAGECACHE 568d99b26c4SPeter Lieven nfs_set_pagecache_ttl(client->context, 0); 569d99b26c4SPeter Lieven #endif 570d99b26c4SPeter Lieven client->cache_used = true; 57194d6a7a7SAshijeet Acharya } 572d99b26c4SPeter Lieven #endif 57394d6a7a7SAshijeet Acharya 574d99b26c4SPeter Lieven #ifdef LIBNFS_FEATURE_PAGECACHE 575f67409a5SPeter Lieven if (qemu_opt_get(opts, "page-cache-size")) { 576d99b26c4SPeter Lieven if (open_flags & BDRV_O_NOCACHE) { 577d99b26c4SPeter Lieven error_setg(errp, "Cannot enable NFS pagecache " 578d99b26c4SPeter Lieven "if cache.direct = on"); 579d99b26c4SPeter Lieven goto fail; 580d99b26c4SPeter Lieven } 581f67409a5SPeter Lieven client->pagecache = qemu_opt_get_number(opts, "page-cache-size", 0); 58294d6a7a7SAshijeet Acharya if (client->pagecache > QEMU_NFS_MAX_PAGECACHE_SIZE) { 583d99b26c4SPeter Lieven error_report("NFS Warning: Truncating NFS pagecache " 584d99b26c4SPeter Lieven "size to %d pages", QEMU_NFS_MAX_PAGECACHE_SIZE); 58594d6a7a7SAshijeet Acharya client->pagecache = QEMU_NFS_MAX_PAGECACHE_SIZE; 586d99b26c4SPeter Lieven } 58794d6a7a7SAshijeet Acharya nfs_set_pagecache(client->context, client->pagecache); 588d99b26c4SPeter Lieven nfs_set_pagecache_ttl(client->context, 0); 58938f8d5e0SPeter Lieven client->cache_used = true; 59094d6a7a7SAshijeet Acharya } 591f42ca3caSPeter Lieven #endif 59294d6a7a7SAshijeet Acharya 5937725b8bfSPeter Lieven #ifdef LIBNFS_FEATURE_DEBUG 59494d6a7a7SAshijeet Acharya if (qemu_opt_get(opts, "debug")) { 59594d6a7a7SAshijeet Acharya client->debug = qemu_opt_get_number(opts, "debug", 0); 5967725b8bfSPeter Lieven /* limit the maximum debug level to avoid potential flooding 5977725b8bfSPeter Lieven * of our log files. */ 59894d6a7a7SAshijeet Acharya if (client->debug > QEMU_NFS_MAX_DEBUG_LEVEL) { 5997725b8bfSPeter Lieven error_report("NFS Warning: Limiting NFS debug level " 6007725b8bfSPeter Lieven "to %d", QEMU_NFS_MAX_DEBUG_LEVEL); 60194d6a7a7SAshijeet Acharya client->debug = QEMU_NFS_MAX_DEBUG_LEVEL; 6027725b8bfSPeter Lieven } 60394d6a7a7SAshijeet Acharya nfs_set_debug(client->context, client->debug); 60494d6a7a7SAshijeet Acharya } 6057725b8bfSPeter Lieven #endif 6066542aa9cSPeter Lieven 60794d6a7a7SAshijeet Acharya ret = nfs_mount(client->context, client->server->host, client->path); 6086542aa9cSPeter Lieven if (ret < 0) { 6096542aa9cSPeter Lieven error_setg(errp, "Failed to mount nfs share: %s", 6106542aa9cSPeter Lieven nfs_get_error(client->context)); 6116542aa9cSPeter Lieven goto fail; 6126542aa9cSPeter Lieven } 6136542aa9cSPeter Lieven 6146542aa9cSPeter Lieven if (flags & O_CREAT) { 6156542aa9cSPeter Lieven ret = nfs_creat(client->context, file, 0600, &client->fh); 6166542aa9cSPeter Lieven if (ret < 0) { 6176542aa9cSPeter Lieven error_setg(errp, "Failed to create file: %s", 6186542aa9cSPeter Lieven nfs_get_error(client->context)); 6196542aa9cSPeter Lieven goto fail; 6206542aa9cSPeter Lieven } 6216542aa9cSPeter Lieven } else { 6226542aa9cSPeter Lieven ret = nfs_open(client->context, file, flags, &client->fh); 6236542aa9cSPeter Lieven if (ret < 0) { 6246542aa9cSPeter Lieven error_setg(errp, "Failed to open file : %s", 6256542aa9cSPeter Lieven nfs_get_error(client->context)); 6266542aa9cSPeter Lieven goto fail; 6276542aa9cSPeter Lieven } 6286542aa9cSPeter Lieven } 6296542aa9cSPeter Lieven 6306542aa9cSPeter Lieven ret = nfs_fstat(client->context, client->fh, &st); 6316542aa9cSPeter Lieven if (ret < 0) { 6326542aa9cSPeter Lieven error_setg(errp, "Failed to fstat file: %s", 6336542aa9cSPeter Lieven nfs_get_error(client->context)); 6346542aa9cSPeter Lieven goto fail; 6356542aa9cSPeter Lieven } 6366542aa9cSPeter Lieven 6376542aa9cSPeter Lieven ret = DIV_ROUND_UP(st.st_size, BDRV_SECTOR_SIZE); 63818a8056eSPeter Lieven client->st_blocks = st.st_blocks; 6396542aa9cSPeter Lieven client->has_zero_init = S_ISREG(st.st_mode); 64094d6a7a7SAshijeet Acharya *strp = '/'; 6416542aa9cSPeter Lieven goto out; 64294d6a7a7SAshijeet Acharya 6436542aa9cSPeter Lieven fail: 6446542aa9cSPeter Lieven nfs_client_close(client); 6456542aa9cSPeter Lieven out: 64694d6a7a7SAshijeet Acharya qemu_opts_del(opts); 6476542aa9cSPeter Lieven g_free(file); 6486542aa9cSPeter Lieven return ret; 6496542aa9cSPeter Lieven } 6506542aa9cSPeter Lieven 6516542aa9cSPeter Lieven static int nfs_file_open(BlockDriverState *bs, QDict *options, int flags, 6526542aa9cSPeter Lieven Error **errp) { 6536542aa9cSPeter Lieven NFSClient *client = bs->opaque; 6546542aa9cSPeter Lieven int64_t ret; 6556542aa9cSPeter Lieven 656471799d1SStefan Hajnoczi client->aio_context = bdrv_get_aio_context(bs); 657471799d1SStefan Hajnoczi 65894d6a7a7SAshijeet Acharya ret = nfs_client_open(client, options, 6596542aa9cSPeter Lieven (flags & BDRV_O_RDWR) ? O_RDWR : O_RDONLY, 660cb8d4bf6SFam Zheng bs->open_flags, errp); 6616542aa9cSPeter Lieven if (ret < 0) { 66294d6a7a7SAshijeet Acharya return ret; 6636542aa9cSPeter Lieven } 66437d1e4d9SPaolo Bonzini qemu_mutex_init(&client->mutex); 6656542aa9cSPeter Lieven bs->total_sectors = ret; 666810f4f86SFam Zheng ret = 0; 667810f4f86SFam Zheng return ret; 6686542aa9cSPeter Lieven } 6696542aa9cSPeter Lieven 670fd752801SMax Reitz static QemuOptsList nfs_create_opts = { 671fd752801SMax Reitz .name = "nfs-create-opts", 672fd752801SMax Reitz .head = QTAILQ_HEAD_INITIALIZER(nfs_create_opts.head), 673fd752801SMax Reitz .desc = { 674fd752801SMax Reitz { 675fd752801SMax Reitz .name = BLOCK_OPT_SIZE, 676fd752801SMax Reitz .type = QEMU_OPT_SIZE, 677fd752801SMax Reitz .help = "Virtual disk size" 678fd752801SMax Reitz }, 679fd752801SMax Reitz { /* end of list */ } 680fd752801SMax Reitz } 681fd752801SMax Reitz }; 682fd752801SMax Reitz 68398c10b81SChunyan Liu static int nfs_file_create(const char *url, QemuOpts *opts, Error **errp) 6846542aa9cSPeter Lieven { 6856542aa9cSPeter Lieven int ret = 0; 6866542aa9cSPeter Lieven int64_t total_size = 0; 6875839e53bSMarkus Armbruster NFSClient *client = g_new0(NFSClient, 1); 68894d6a7a7SAshijeet Acharya QDict *options = NULL; 6896542aa9cSPeter Lieven 690471799d1SStefan Hajnoczi client->aio_context = qemu_get_aio_context(); 691471799d1SStefan Hajnoczi 6926542aa9cSPeter Lieven /* Read out options */ 693c2eb918eSHu Tao total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), 694c2eb918eSHu Tao BDRV_SECTOR_SIZE); 6956542aa9cSPeter Lieven 69694d6a7a7SAshijeet Acharya options = qdict_new(); 69794d6a7a7SAshijeet Acharya ret = nfs_parse_uri(url, options, errp); 69894d6a7a7SAshijeet Acharya if (ret < 0) { 69994d6a7a7SAshijeet Acharya goto out; 70094d6a7a7SAshijeet Acharya } 70194d6a7a7SAshijeet Acharya 702cb8d4bf6SFam Zheng ret = nfs_client_open(client, options, O_CREAT, 0, errp); 7036542aa9cSPeter Lieven if (ret < 0) { 7046542aa9cSPeter Lieven goto out; 7056542aa9cSPeter Lieven } 7066542aa9cSPeter Lieven ret = nfs_ftruncate(client->context, client->fh, total_size); 7076542aa9cSPeter Lieven nfs_client_close(client); 7086542aa9cSPeter Lieven out: 70907555ba6SKevin Wolf QDECREF(options); 7106542aa9cSPeter Lieven g_free(client); 7116542aa9cSPeter Lieven return ret; 7126542aa9cSPeter Lieven } 7136542aa9cSPeter Lieven 7146542aa9cSPeter Lieven static int nfs_has_zero_init(BlockDriverState *bs) 7156542aa9cSPeter Lieven { 7166542aa9cSPeter Lieven NFSClient *client = bs->opaque; 7176542aa9cSPeter Lieven return client->has_zero_init; 7186542aa9cSPeter Lieven } 7196542aa9cSPeter Lieven 72037d1e4d9SPaolo Bonzini /* Called (via nfs_service) with QemuMutex held. */ 721d746427aSPaolo Bonzini static void 722d746427aSPaolo Bonzini nfs_get_allocated_file_size_cb(int ret, struct nfs_context *nfs, void *data, 723d746427aSPaolo Bonzini void *private_data) 724d746427aSPaolo Bonzini { 725d746427aSPaolo Bonzini NFSRPC *task = private_data; 726d746427aSPaolo Bonzini task->ret = ret; 727d746427aSPaolo Bonzini if (task->ret == 0) { 728d746427aSPaolo Bonzini memcpy(task->st, data, sizeof(struct stat)); 729d746427aSPaolo Bonzini } 730d746427aSPaolo Bonzini if (task->ret < 0) { 731d746427aSPaolo Bonzini error_report("NFS Error: %s", nfs_get_error(nfs)); 732d746427aSPaolo Bonzini } 733*e2a6ae7fSPaolo Bonzini 734*e2a6ae7fSPaolo Bonzini /* Set task->complete before reading bs->wakeup. */ 735*e2a6ae7fSPaolo Bonzini atomic_mb_set(&task->complete, 1); 736c9d1a561SPaolo Bonzini bdrv_wakeup(task->bs); 737d746427aSPaolo Bonzini } 738d746427aSPaolo Bonzini 7396542aa9cSPeter Lieven static int64_t nfs_get_allocated_file_size(BlockDriverState *bs) 7406542aa9cSPeter Lieven { 7416542aa9cSPeter Lieven NFSClient *client = bs->opaque; 7426542aa9cSPeter Lieven NFSRPC task = {0}; 7436542aa9cSPeter Lieven struct stat st; 7446542aa9cSPeter Lieven 74518a8056eSPeter Lieven if (bdrv_is_read_only(bs) && 74618a8056eSPeter Lieven !(bs->open_flags & BDRV_O_NOCACHE)) { 74718a8056eSPeter Lieven return client->st_blocks * 512; 74818a8056eSPeter Lieven } 74918a8056eSPeter Lieven 750d746427aSPaolo Bonzini task.bs = bs; 7516542aa9cSPeter Lieven task.st = &st; 752d746427aSPaolo Bonzini if (nfs_fstat_async(client->context, client->fh, nfs_get_allocated_file_size_cb, 7536542aa9cSPeter Lieven &task) != 0) { 7546542aa9cSPeter Lieven return -ENOMEM; 7556542aa9cSPeter Lieven } 7566542aa9cSPeter Lieven 7576542aa9cSPeter Lieven nfs_set_events(client); 758d746427aSPaolo Bonzini BDRV_POLL_WHILE(bs, !task.complete); 7596542aa9cSPeter Lieven 760055c6f91SPeter Lieven return (task.ret < 0 ? task.ret : st.st_blocks * 512); 7616542aa9cSPeter Lieven } 7626542aa9cSPeter Lieven 7634bff28b8SMax Reitz static int nfs_file_truncate(BlockDriverState *bs, int64_t offset, Error **errp) 7646542aa9cSPeter Lieven { 7656542aa9cSPeter Lieven NFSClient *client = bs->opaque; 766f59adb32SMax Reitz int ret; 767f59adb32SMax Reitz 768f59adb32SMax Reitz ret = nfs_ftruncate(client->context, client->fh, offset); 769f59adb32SMax Reitz if (ret < 0) { 770f59adb32SMax Reitz error_setg_errno(errp, -ret, "Failed to truncate file"); 771f59adb32SMax Reitz return ret; 772f59adb32SMax Reitz } 773f59adb32SMax Reitz 774f59adb32SMax Reitz return 0; 7756542aa9cSPeter Lieven } 7766542aa9cSPeter Lieven 77718a8056eSPeter Lieven /* Note that this will not re-establish a connection with the NFS server 77818a8056eSPeter Lieven * - it is effectively a NOP. */ 77918a8056eSPeter Lieven static int nfs_reopen_prepare(BDRVReopenState *state, 78018a8056eSPeter Lieven BlockReopenQueue *queue, Error **errp) 78118a8056eSPeter Lieven { 78218a8056eSPeter Lieven NFSClient *client = state->bs->opaque; 78318a8056eSPeter Lieven struct stat st; 78418a8056eSPeter Lieven int ret = 0; 78518a8056eSPeter Lieven 78618a8056eSPeter Lieven if (state->flags & BDRV_O_RDWR && bdrv_is_read_only(state->bs)) { 78718a8056eSPeter Lieven error_setg(errp, "Cannot open a read-only mount as read-write"); 78818a8056eSPeter Lieven return -EACCES; 78918a8056eSPeter Lieven } 79018a8056eSPeter Lieven 79138f8d5e0SPeter Lieven if ((state->flags & BDRV_O_NOCACHE) && client->cache_used) { 792d99b26c4SPeter Lieven error_setg(errp, "Cannot disable cache if libnfs readahead or" 793d99b26c4SPeter Lieven " pagecache is enabled"); 79438f8d5e0SPeter Lieven return -EINVAL; 79538f8d5e0SPeter Lieven } 79638f8d5e0SPeter Lieven 79718a8056eSPeter Lieven /* Update cache for read-only reopens */ 79818a8056eSPeter Lieven if (!(state->flags & BDRV_O_RDWR)) { 79918a8056eSPeter Lieven ret = nfs_fstat(client->context, client->fh, &st); 80018a8056eSPeter Lieven if (ret < 0) { 80118a8056eSPeter Lieven error_setg(errp, "Failed to fstat file: %s", 80218a8056eSPeter Lieven nfs_get_error(client->context)); 80318a8056eSPeter Lieven return ret; 80418a8056eSPeter Lieven } 80518a8056eSPeter Lieven client->st_blocks = st.st_blocks; 80618a8056eSPeter Lieven } 80718a8056eSPeter Lieven 80818a8056eSPeter Lieven return 0; 80918a8056eSPeter Lieven } 81018a8056eSPeter Lieven 81194d6a7a7SAshijeet Acharya static void nfs_refresh_filename(BlockDriverState *bs, QDict *options) 81294d6a7a7SAshijeet Acharya { 81394d6a7a7SAshijeet Acharya NFSClient *client = bs->opaque; 81494d6a7a7SAshijeet Acharya QDict *opts = qdict_new(); 81594d6a7a7SAshijeet Acharya QObject *server_qdict; 81694d6a7a7SAshijeet Acharya Visitor *ov; 81794d6a7a7SAshijeet Acharya 81846f5ac20SEric Blake qdict_put_str(opts, "driver", "nfs"); 81994d6a7a7SAshijeet Acharya 82094d6a7a7SAshijeet Acharya if (client->uid && !client->gid) { 82194d6a7a7SAshijeet Acharya snprintf(bs->exact_filename, sizeof(bs->exact_filename), 82294d6a7a7SAshijeet Acharya "nfs://%s%s?uid=%" PRId64, client->server->host, client->path, 82394d6a7a7SAshijeet Acharya client->uid); 82494d6a7a7SAshijeet Acharya } else if (!client->uid && client->gid) { 82594d6a7a7SAshijeet Acharya snprintf(bs->exact_filename, sizeof(bs->exact_filename), 82694d6a7a7SAshijeet Acharya "nfs://%s%s?gid=%" PRId64, client->server->host, client->path, 82794d6a7a7SAshijeet Acharya client->gid); 82894d6a7a7SAshijeet Acharya } else if (client->uid && client->gid) { 82994d6a7a7SAshijeet Acharya snprintf(bs->exact_filename, sizeof(bs->exact_filename), 83094d6a7a7SAshijeet Acharya "nfs://%s%s?uid=%" PRId64 "&gid=%" PRId64, 83194d6a7a7SAshijeet Acharya client->server->host, client->path, client->uid, client->gid); 83294d6a7a7SAshijeet Acharya } else { 83394d6a7a7SAshijeet Acharya snprintf(bs->exact_filename, sizeof(bs->exact_filename), 83494d6a7a7SAshijeet Acharya "nfs://%s%s", client->server->host, client->path); 83594d6a7a7SAshijeet Acharya } 83694d6a7a7SAshijeet Acharya 83794d6a7a7SAshijeet Acharya ov = qobject_output_visitor_new(&server_qdict); 83894d6a7a7SAshijeet Acharya visit_type_NFSServer(ov, NULL, &client->server, &error_abort); 83994d6a7a7SAshijeet Acharya visit_complete(ov, &server_qdict); 84094d6a7a7SAshijeet Acharya qdict_put_obj(opts, "server", server_qdict); 84146f5ac20SEric Blake qdict_put_str(opts, "path", client->path); 84294d6a7a7SAshijeet Acharya 84394d6a7a7SAshijeet Acharya if (client->uid) { 84446f5ac20SEric Blake qdict_put_int(opts, "user", client->uid); 84594d6a7a7SAshijeet Acharya } 84694d6a7a7SAshijeet Acharya if (client->gid) { 84746f5ac20SEric Blake qdict_put_int(opts, "group", client->gid); 84894d6a7a7SAshijeet Acharya } 84994d6a7a7SAshijeet Acharya if (client->tcp_syncnt) { 85046f5ac20SEric Blake qdict_put_int(opts, "tcp-syn-cnt", client->tcp_syncnt); 85194d6a7a7SAshijeet Acharya } 85294d6a7a7SAshijeet Acharya if (client->readahead) { 85346f5ac20SEric Blake qdict_put_int(opts, "readahead-size", client->readahead); 85494d6a7a7SAshijeet Acharya } 85594d6a7a7SAshijeet Acharya if (client->pagecache) { 85646f5ac20SEric Blake qdict_put_int(opts, "page-cache-size", client->pagecache); 85794d6a7a7SAshijeet Acharya } 85894d6a7a7SAshijeet Acharya if (client->debug) { 85946f5ac20SEric Blake qdict_put_int(opts, "debug", client->debug); 86094d6a7a7SAshijeet Acharya } 86194d6a7a7SAshijeet Acharya 86294d6a7a7SAshijeet Acharya visit_free(ov); 86394d6a7a7SAshijeet Acharya qdict_flatten(opts); 86494d6a7a7SAshijeet Acharya bs->full_open_options = opts; 86594d6a7a7SAshijeet Acharya } 86694d6a7a7SAshijeet Acharya 867d99b26c4SPeter Lieven #ifdef LIBNFS_FEATURE_PAGECACHE 868d99b26c4SPeter Lieven static void nfs_invalidate_cache(BlockDriverState *bs, 869d99b26c4SPeter Lieven Error **errp) 870d99b26c4SPeter Lieven { 871d99b26c4SPeter Lieven NFSClient *client = bs->opaque; 872d99b26c4SPeter Lieven nfs_pagecache_invalidate(client->context, client->fh); 873d99b26c4SPeter Lieven } 874d99b26c4SPeter Lieven #endif 875d99b26c4SPeter Lieven 8766542aa9cSPeter Lieven static BlockDriver bdrv_nfs = { 8776542aa9cSPeter Lieven .format_name = "nfs", 8786542aa9cSPeter Lieven .protocol_name = "nfs", 8796542aa9cSPeter Lieven 8806542aa9cSPeter Lieven .instance_size = sizeof(NFSClient), 88194d6a7a7SAshijeet Acharya .bdrv_parse_filename = nfs_parse_filename, 882fd752801SMax Reitz .create_opts = &nfs_create_opts, 883fd752801SMax Reitz 8846542aa9cSPeter Lieven .bdrv_has_zero_init = nfs_has_zero_init, 8856542aa9cSPeter Lieven .bdrv_get_allocated_file_size = nfs_get_allocated_file_size, 8866542aa9cSPeter Lieven .bdrv_truncate = nfs_file_truncate, 8876542aa9cSPeter Lieven 8886542aa9cSPeter Lieven .bdrv_file_open = nfs_file_open, 8896542aa9cSPeter Lieven .bdrv_close = nfs_file_close, 890c282e1fdSChunyan Liu .bdrv_create = nfs_file_create, 89118a8056eSPeter Lieven .bdrv_reopen_prepare = nfs_reopen_prepare, 8926542aa9cSPeter Lieven 89369785a22SPeter Lieven .bdrv_co_preadv = nfs_co_preadv, 89469785a22SPeter Lieven .bdrv_co_pwritev = nfs_co_pwritev, 8956542aa9cSPeter Lieven .bdrv_co_flush_to_disk = nfs_co_flush, 896471799d1SStefan Hajnoczi 897471799d1SStefan Hajnoczi .bdrv_detach_aio_context = nfs_detach_aio_context, 898471799d1SStefan Hajnoczi .bdrv_attach_aio_context = nfs_attach_aio_context, 89994d6a7a7SAshijeet Acharya .bdrv_refresh_filename = nfs_refresh_filename, 900d99b26c4SPeter Lieven 901d99b26c4SPeter Lieven #ifdef LIBNFS_FEATURE_PAGECACHE 902d99b26c4SPeter Lieven .bdrv_invalidate_cache = nfs_invalidate_cache, 903d99b26c4SPeter Lieven #endif 9046542aa9cSPeter Lieven }; 9056542aa9cSPeter Lieven 9066542aa9cSPeter Lieven static void nfs_block_init(void) 9076542aa9cSPeter Lieven { 9086542aa9cSPeter Lieven bdrv_register(&bdrv_nfs); 9096542aa9cSPeter Lieven } 9106542aa9cSPeter Lieven 9116542aa9cSPeter Lieven block_init(nfs_block_init); 912