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; 5718a8056eSPeter Lieven blkcnt_t st_blocks; 5838f8d5e0SPeter Lieven bool cache_used; 5994d6a7a7SAshijeet Acharya NFSServer *server; 6094d6a7a7SAshijeet Acharya char *path; 6194d6a7a7SAshijeet Acharya int64_t uid, gid, tcp_syncnt, readahead, pagecache, debug; 626542aa9cSPeter Lieven } NFSClient; 636542aa9cSPeter Lieven 646542aa9cSPeter Lieven typedef struct NFSRPC { 65d746427aSPaolo Bonzini BlockDriverState *bs; 666542aa9cSPeter Lieven int ret; 676542aa9cSPeter Lieven int complete; 686542aa9cSPeter Lieven QEMUIOVector *iov; 696542aa9cSPeter Lieven struct stat *st; 706542aa9cSPeter Lieven Coroutine *co; 71471799d1SStefan Hajnoczi NFSClient *client; 726542aa9cSPeter Lieven } NFSRPC; 736542aa9cSPeter Lieven 7494d6a7a7SAshijeet Acharya static int nfs_parse_uri(const char *filename, QDict *options, Error **errp) 7594d6a7a7SAshijeet Acharya { 7694d6a7a7SAshijeet Acharya URI *uri = NULL; 7794d6a7a7SAshijeet Acharya QueryParams *qp = NULL; 7894d6a7a7SAshijeet Acharya int ret = -EINVAL, i; 7994d6a7a7SAshijeet Acharya 8094d6a7a7SAshijeet Acharya uri = uri_parse(filename); 8194d6a7a7SAshijeet Acharya if (!uri) { 8294d6a7a7SAshijeet Acharya error_setg(errp, "Invalid URI specified"); 8394d6a7a7SAshijeet Acharya goto out; 8494d6a7a7SAshijeet Acharya } 8594d6a7a7SAshijeet Acharya if (strcmp(uri->scheme, "nfs") != 0) { 8694d6a7a7SAshijeet Acharya error_setg(errp, "URI scheme must be 'nfs'"); 8794d6a7a7SAshijeet Acharya goto out; 8894d6a7a7SAshijeet Acharya } 8994d6a7a7SAshijeet Acharya 9094d6a7a7SAshijeet Acharya if (!uri->server) { 9194d6a7a7SAshijeet Acharya error_setg(errp, "missing hostname in URI"); 9294d6a7a7SAshijeet Acharya goto out; 9394d6a7a7SAshijeet Acharya } 9494d6a7a7SAshijeet Acharya 9594d6a7a7SAshijeet Acharya if (!uri->path) { 9694d6a7a7SAshijeet Acharya error_setg(errp, "missing file path in URI"); 9794d6a7a7SAshijeet Acharya goto out; 9894d6a7a7SAshijeet Acharya } 9994d6a7a7SAshijeet Acharya 10094d6a7a7SAshijeet Acharya qp = query_params_parse(uri->query); 10194d6a7a7SAshijeet Acharya if (!qp) { 10294d6a7a7SAshijeet Acharya error_setg(errp, "could not parse query parameters"); 10394d6a7a7SAshijeet Acharya goto out; 10494d6a7a7SAshijeet Acharya } 10594d6a7a7SAshijeet Acharya 10694d6a7a7SAshijeet Acharya qdict_put(options, "server.host", qstring_from_str(uri->server)); 10794d6a7a7SAshijeet Acharya qdict_put(options, "server.type", qstring_from_str("inet")); 10894d6a7a7SAshijeet Acharya qdict_put(options, "path", qstring_from_str(uri->path)); 10994d6a7a7SAshijeet Acharya 11094d6a7a7SAshijeet Acharya for (i = 0; i < qp->n; i++) { 111*8d20abe8SPeter Lieven unsigned long long val; 11294d6a7a7SAshijeet Acharya if (!qp->p[i].value) { 11394d6a7a7SAshijeet Acharya error_setg(errp, "Value for NFS parameter expected: %s", 11494d6a7a7SAshijeet Acharya qp->p[i].name); 11594d6a7a7SAshijeet Acharya goto out; 11694d6a7a7SAshijeet Acharya } 117*8d20abe8SPeter Lieven if (parse_uint_full(qp->p[i].value, &val, 0)) { 11894d6a7a7SAshijeet Acharya error_setg(errp, "Illegal value for NFS parameter: %s", 11994d6a7a7SAshijeet Acharya qp->p[i].name); 12094d6a7a7SAshijeet Acharya goto out; 12194d6a7a7SAshijeet Acharya } 12294d6a7a7SAshijeet Acharya if (!strcmp(qp->p[i].name, "uid")) { 12394d6a7a7SAshijeet Acharya qdict_put(options, "user", 12494d6a7a7SAshijeet Acharya qstring_from_str(qp->p[i].value)); 12594d6a7a7SAshijeet Acharya } else if (!strcmp(qp->p[i].name, "gid")) { 12694d6a7a7SAshijeet Acharya qdict_put(options, "group", 12794d6a7a7SAshijeet Acharya qstring_from_str(qp->p[i].value)); 12894d6a7a7SAshijeet Acharya } else if (!strcmp(qp->p[i].name, "tcp-syncnt")) { 12994d6a7a7SAshijeet Acharya qdict_put(options, "tcp-syn-count", 13094d6a7a7SAshijeet Acharya qstring_from_str(qp->p[i].value)); 13194d6a7a7SAshijeet Acharya } else if (!strcmp(qp->p[i].name, "readahead")) { 13294d6a7a7SAshijeet Acharya qdict_put(options, "readahead-size", 13394d6a7a7SAshijeet Acharya qstring_from_str(qp->p[i].value)); 13494d6a7a7SAshijeet Acharya } else if (!strcmp(qp->p[i].name, "pagecache")) { 13594d6a7a7SAshijeet Acharya qdict_put(options, "page-cache-size", 13694d6a7a7SAshijeet Acharya qstring_from_str(qp->p[i].value)); 13794d6a7a7SAshijeet Acharya } else if (!strcmp(qp->p[i].name, "debug")) { 1387103d916SPrasanna Kumar Kalever qdict_put(options, "debug", 13994d6a7a7SAshijeet Acharya qstring_from_str(qp->p[i].value)); 14094d6a7a7SAshijeet Acharya } else { 14194d6a7a7SAshijeet Acharya error_setg(errp, "Unknown NFS parameter name: %s", 14294d6a7a7SAshijeet Acharya qp->p[i].name); 14394d6a7a7SAshijeet Acharya goto out; 14494d6a7a7SAshijeet Acharya } 14594d6a7a7SAshijeet Acharya } 14694d6a7a7SAshijeet Acharya ret = 0; 14794d6a7a7SAshijeet Acharya out: 14894d6a7a7SAshijeet Acharya if (qp) { 14994d6a7a7SAshijeet Acharya query_params_free(qp); 15094d6a7a7SAshijeet Acharya } 15194d6a7a7SAshijeet Acharya if (uri) { 15294d6a7a7SAshijeet Acharya uri_free(uri); 15394d6a7a7SAshijeet Acharya } 15494d6a7a7SAshijeet Acharya return ret; 15594d6a7a7SAshijeet Acharya } 15694d6a7a7SAshijeet Acharya 15794d6a7a7SAshijeet Acharya static bool nfs_has_filename_options_conflict(QDict *options, Error **errp) 15894d6a7a7SAshijeet Acharya { 15994d6a7a7SAshijeet Acharya const QDictEntry *qe; 16094d6a7a7SAshijeet Acharya 16194d6a7a7SAshijeet Acharya for (qe = qdict_first(options); qe; qe = qdict_next(options, qe)) { 16294d6a7a7SAshijeet Acharya if (!strcmp(qe->key, "host") || 16394d6a7a7SAshijeet Acharya !strcmp(qe->key, "path") || 16494d6a7a7SAshijeet Acharya !strcmp(qe->key, "user") || 16594d6a7a7SAshijeet Acharya !strcmp(qe->key, "group") || 16694d6a7a7SAshijeet Acharya !strcmp(qe->key, "tcp-syn-count") || 16794d6a7a7SAshijeet Acharya !strcmp(qe->key, "readahead-size") || 16894d6a7a7SAshijeet Acharya !strcmp(qe->key, "page-cache-size") || 1697103d916SPrasanna Kumar Kalever !strcmp(qe->key, "debug") || 17094d6a7a7SAshijeet Acharya strstart(qe->key, "server.", NULL)) 17194d6a7a7SAshijeet Acharya { 17294d6a7a7SAshijeet Acharya error_setg(errp, "Option %s cannot be used with a filename", 17394d6a7a7SAshijeet Acharya qe->key); 17494d6a7a7SAshijeet Acharya return true; 17594d6a7a7SAshijeet Acharya } 17694d6a7a7SAshijeet Acharya } 17794d6a7a7SAshijeet Acharya 17894d6a7a7SAshijeet Acharya return false; 17994d6a7a7SAshijeet Acharya } 18094d6a7a7SAshijeet Acharya 18194d6a7a7SAshijeet Acharya static void nfs_parse_filename(const char *filename, QDict *options, 18294d6a7a7SAshijeet Acharya Error **errp) 18394d6a7a7SAshijeet Acharya { 18494d6a7a7SAshijeet Acharya if (nfs_has_filename_options_conflict(options, errp)) { 18594d6a7a7SAshijeet Acharya return; 18694d6a7a7SAshijeet Acharya } 18794d6a7a7SAshijeet Acharya 18894d6a7a7SAshijeet Acharya nfs_parse_uri(filename, options, errp); 18994d6a7a7SAshijeet Acharya } 19094d6a7a7SAshijeet Acharya 1916542aa9cSPeter Lieven static void nfs_process_read(void *arg); 1926542aa9cSPeter Lieven static void nfs_process_write(void *arg); 1936542aa9cSPeter Lieven 1946542aa9cSPeter Lieven static void nfs_set_events(NFSClient *client) 1956542aa9cSPeter Lieven { 1966542aa9cSPeter Lieven int ev = nfs_which_events(client->context); 1976542aa9cSPeter Lieven if (ev != client->events) { 198dca21ef2SFam Zheng aio_set_fd_handler(client->aio_context, nfs_get_fd(client->context), 199dca21ef2SFam Zheng false, 2006542aa9cSPeter Lieven (ev & POLLIN) ? nfs_process_read : NULL, 201f6a51c84SStefan Hajnoczi (ev & POLLOUT) ? nfs_process_write : NULL, 202f6a51c84SStefan Hajnoczi NULL, client); 2036542aa9cSPeter Lieven 2046542aa9cSPeter Lieven } 2056542aa9cSPeter Lieven client->events = ev; 2066542aa9cSPeter Lieven } 2076542aa9cSPeter Lieven 2086542aa9cSPeter Lieven static void nfs_process_read(void *arg) 2096542aa9cSPeter Lieven { 2106542aa9cSPeter Lieven NFSClient *client = arg; 2116542aa9cSPeter Lieven nfs_service(client->context, POLLIN); 2126542aa9cSPeter Lieven nfs_set_events(client); 2136542aa9cSPeter Lieven } 2146542aa9cSPeter Lieven 2156542aa9cSPeter Lieven static void nfs_process_write(void *arg) 2166542aa9cSPeter Lieven { 2176542aa9cSPeter Lieven NFSClient *client = arg; 2186542aa9cSPeter Lieven nfs_service(client->context, POLLOUT); 2196542aa9cSPeter Lieven nfs_set_events(client); 2206542aa9cSPeter Lieven } 2216542aa9cSPeter Lieven 222d746427aSPaolo Bonzini static void nfs_co_init_task(BlockDriverState *bs, NFSRPC *task) 2236542aa9cSPeter Lieven { 2246542aa9cSPeter Lieven *task = (NFSRPC) { 2256542aa9cSPeter Lieven .co = qemu_coroutine_self(), 226d746427aSPaolo Bonzini .bs = bs, 227d746427aSPaolo Bonzini .client = bs->opaque, 2286542aa9cSPeter Lieven }; 2296542aa9cSPeter Lieven } 2306542aa9cSPeter Lieven 2316542aa9cSPeter Lieven static void nfs_co_generic_bh_cb(void *opaque) 2326542aa9cSPeter Lieven { 2336542aa9cSPeter Lieven NFSRPC *task = opaque; 234a2c0fe2fSPeter Lieven task->complete = 1; 2350b8b8753SPaolo Bonzini qemu_coroutine_enter(task->co); 2366542aa9cSPeter Lieven } 2376542aa9cSPeter Lieven 2386542aa9cSPeter Lieven static void 2396542aa9cSPeter Lieven nfs_co_generic_cb(int ret, struct nfs_context *nfs, void *data, 2406542aa9cSPeter Lieven void *private_data) 2416542aa9cSPeter Lieven { 2426542aa9cSPeter Lieven NFSRPC *task = private_data; 2436542aa9cSPeter Lieven task->ret = ret; 244d746427aSPaolo Bonzini assert(!task->st); 2456542aa9cSPeter Lieven if (task->ret > 0 && task->iov) { 2466542aa9cSPeter Lieven if (task->ret <= task->iov->size) { 2476542aa9cSPeter Lieven qemu_iovec_from_buf(task->iov, 0, data, task->ret); 2486542aa9cSPeter Lieven } else { 2496542aa9cSPeter Lieven task->ret = -EIO; 2506542aa9cSPeter Lieven } 2516542aa9cSPeter Lieven } 25220fccb18SPeter Lieven if (task->ret < 0) { 25320fccb18SPeter Lieven error_report("NFS Error: %s", nfs_get_error(nfs)); 25420fccb18SPeter Lieven } 255fffb6e12SPaolo Bonzini aio_bh_schedule_oneshot(task->client->aio_context, 256471799d1SStefan Hajnoczi nfs_co_generic_bh_cb, task); 2576542aa9cSPeter Lieven } 2586542aa9cSPeter Lieven 2596542aa9cSPeter Lieven static int coroutine_fn nfs_co_readv(BlockDriverState *bs, 2606542aa9cSPeter Lieven int64_t sector_num, int nb_sectors, 2616542aa9cSPeter Lieven QEMUIOVector *iov) 2626542aa9cSPeter Lieven { 2636542aa9cSPeter Lieven NFSClient *client = bs->opaque; 2646542aa9cSPeter Lieven NFSRPC task; 2656542aa9cSPeter Lieven 266d746427aSPaolo Bonzini nfs_co_init_task(bs, &task); 2676542aa9cSPeter Lieven task.iov = iov; 2686542aa9cSPeter Lieven 2696542aa9cSPeter Lieven if (nfs_pread_async(client->context, client->fh, 2706542aa9cSPeter Lieven sector_num * BDRV_SECTOR_SIZE, 2716542aa9cSPeter Lieven nb_sectors * BDRV_SECTOR_SIZE, 2726542aa9cSPeter Lieven nfs_co_generic_cb, &task) != 0) { 2736542aa9cSPeter Lieven return -ENOMEM; 2746542aa9cSPeter Lieven } 2756542aa9cSPeter Lieven 2766542aa9cSPeter Lieven nfs_set_events(client); 277aa92d6c4SPaolo Bonzini while (!task.complete) { 2786542aa9cSPeter Lieven qemu_coroutine_yield(); 2796542aa9cSPeter Lieven } 2806542aa9cSPeter Lieven 2816542aa9cSPeter Lieven if (task.ret < 0) { 2826542aa9cSPeter Lieven return task.ret; 2836542aa9cSPeter Lieven } 2846542aa9cSPeter Lieven 2856542aa9cSPeter Lieven /* zero pad short reads */ 2866542aa9cSPeter Lieven if (task.ret < iov->size) { 2876542aa9cSPeter Lieven qemu_iovec_memset(iov, task.ret, 0, iov->size - task.ret); 2886542aa9cSPeter Lieven } 2896542aa9cSPeter Lieven 2906542aa9cSPeter Lieven return 0; 2916542aa9cSPeter Lieven } 2926542aa9cSPeter Lieven 2936542aa9cSPeter Lieven static int coroutine_fn nfs_co_writev(BlockDriverState *bs, 2946542aa9cSPeter Lieven int64_t sector_num, int nb_sectors, 2956542aa9cSPeter Lieven QEMUIOVector *iov) 2966542aa9cSPeter Lieven { 2976542aa9cSPeter Lieven NFSClient *client = bs->opaque; 2986542aa9cSPeter Lieven NFSRPC task; 2996542aa9cSPeter Lieven char *buf = NULL; 3006542aa9cSPeter Lieven 301d746427aSPaolo Bonzini nfs_co_init_task(bs, &task); 3026542aa9cSPeter Lieven 3032347dd7bSKevin Wolf buf = g_try_malloc(nb_sectors * BDRV_SECTOR_SIZE); 3042347dd7bSKevin Wolf if (nb_sectors && buf == NULL) { 3052347dd7bSKevin Wolf return -ENOMEM; 3062347dd7bSKevin Wolf } 3072347dd7bSKevin Wolf 3086542aa9cSPeter Lieven qemu_iovec_to_buf(iov, 0, buf, nb_sectors * BDRV_SECTOR_SIZE); 3096542aa9cSPeter Lieven 3106542aa9cSPeter Lieven if (nfs_pwrite_async(client->context, client->fh, 3116542aa9cSPeter Lieven sector_num * BDRV_SECTOR_SIZE, 3126542aa9cSPeter Lieven nb_sectors * BDRV_SECTOR_SIZE, 3136542aa9cSPeter Lieven buf, nfs_co_generic_cb, &task) != 0) { 3146542aa9cSPeter Lieven g_free(buf); 3156542aa9cSPeter Lieven return -ENOMEM; 3166542aa9cSPeter Lieven } 3176542aa9cSPeter Lieven 3186542aa9cSPeter Lieven nfs_set_events(client); 319aa92d6c4SPaolo Bonzini while (!task.complete) { 3206542aa9cSPeter Lieven qemu_coroutine_yield(); 3216542aa9cSPeter Lieven } 3226542aa9cSPeter Lieven 3236542aa9cSPeter Lieven g_free(buf); 3246542aa9cSPeter Lieven 3256542aa9cSPeter Lieven if (task.ret != nb_sectors * BDRV_SECTOR_SIZE) { 3266542aa9cSPeter Lieven return task.ret < 0 ? task.ret : -EIO; 3276542aa9cSPeter Lieven } 3286542aa9cSPeter Lieven 3296542aa9cSPeter Lieven return 0; 3306542aa9cSPeter Lieven } 3316542aa9cSPeter Lieven 3326542aa9cSPeter Lieven static int coroutine_fn nfs_co_flush(BlockDriverState *bs) 3336542aa9cSPeter Lieven { 3346542aa9cSPeter Lieven NFSClient *client = bs->opaque; 3356542aa9cSPeter Lieven NFSRPC task; 3366542aa9cSPeter Lieven 337d746427aSPaolo Bonzini nfs_co_init_task(bs, &task); 3386542aa9cSPeter Lieven 3396542aa9cSPeter Lieven if (nfs_fsync_async(client->context, client->fh, nfs_co_generic_cb, 3406542aa9cSPeter Lieven &task) != 0) { 3416542aa9cSPeter Lieven return -ENOMEM; 3426542aa9cSPeter Lieven } 3436542aa9cSPeter Lieven 3446542aa9cSPeter Lieven nfs_set_events(client); 345aa92d6c4SPaolo Bonzini while (!task.complete) { 3466542aa9cSPeter Lieven qemu_coroutine_yield(); 3476542aa9cSPeter Lieven } 3486542aa9cSPeter Lieven 3496542aa9cSPeter Lieven return task.ret; 3506542aa9cSPeter Lieven } 3516542aa9cSPeter Lieven 3526542aa9cSPeter Lieven static QemuOptsList runtime_opts = { 3536542aa9cSPeter Lieven .name = "nfs", 3546542aa9cSPeter Lieven .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), 3556542aa9cSPeter Lieven .desc = { 3566542aa9cSPeter Lieven { 35794d6a7a7SAshijeet Acharya .name = "path", 3586542aa9cSPeter Lieven .type = QEMU_OPT_STRING, 35994d6a7a7SAshijeet Acharya .help = "Path of the image on the host", 36094d6a7a7SAshijeet Acharya }, 36194d6a7a7SAshijeet Acharya { 36294d6a7a7SAshijeet Acharya .name = "uid", 36394d6a7a7SAshijeet Acharya .type = QEMU_OPT_NUMBER, 36494d6a7a7SAshijeet Acharya .help = "UID value to use when talking to the server", 36594d6a7a7SAshijeet Acharya }, 36694d6a7a7SAshijeet Acharya { 36794d6a7a7SAshijeet Acharya .name = "gid", 36894d6a7a7SAshijeet Acharya .type = QEMU_OPT_NUMBER, 36994d6a7a7SAshijeet Acharya .help = "GID value to use when talking to the server", 37094d6a7a7SAshijeet Acharya }, 37194d6a7a7SAshijeet Acharya { 37294d6a7a7SAshijeet Acharya .name = "tcp-syncnt", 37394d6a7a7SAshijeet Acharya .type = QEMU_OPT_NUMBER, 37494d6a7a7SAshijeet Acharya .help = "Number of SYNs to send during the session establish", 37594d6a7a7SAshijeet Acharya }, 37694d6a7a7SAshijeet Acharya { 37794d6a7a7SAshijeet Acharya .name = "readahead", 37894d6a7a7SAshijeet Acharya .type = QEMU_OPT_NUMBER, 37994d6a7a7SAshijeet Acharya .help = "Set the readahead size in bytes", 38094d6a7a7SAshijeet Acharya }, 38194d6a7a7SAshijeet Acharya { 38294d6a7a7SAshijeet Acharya .name = "pagecache", 38394d6a7a7SAshijeet Acharya .type = QEMU_OPT_NUMBER, 38494d6a7a7SAshijeet Acharya .help = "Set the pagecache size in bytes", 38594d6a7a7SAshijeet Acharya }, 38694d6a7a7SAshijeet Acharya { 38794d6a7a7SAshijeet Acharya .name = "debug", 38894d6a7a7SAshijeet Acharya .type = QEMU_OPT_NUMBER, 38994d6a7a7SAshijeet Acharya .help = "Set the NFS debug level (max 2)", 3906542aa9cSPeter Lieven }, 3916542aa9cSPeter Lieven { /* end of list */ } 3926542aa9cSPeter Lieven }, 3936542aa9cSPeter Lieven }; 3946542aa9cSPeter Lieven 395471799d1SStefan Hajnoczi static void nfs_detach_aio_context(BlockDriverState *bs) 396471799d1SStefan Hajnoczi { 397471799d1SStefan Hajnoczi NFSClient *client = bs->opaque; 398471799d1SStefan Hajnoczi 399dca21ef2SFam Zheng aio_set_fd_handler(client->aio_context, nfs_get_fd(client->context), 400f6a51c84SStefan Hajnoczi false, NULL, NULL, NULL, NULL); 401471799d1SStefan Hajnoczi client->events = 0; 402471799d1SStefan Hajnoczi } 403471799d1SStefan Hajnoczi 404471799d1SStefan Hajnoczi static void nfs_attach_aio_context(BlockDriverState *bs, 405471799d1SStefan Hajnoczi AioContext *new_context) 406471799d1SStefan Hajnoczi { 407471799d1SStefan Hajnoczi NFSClient *client = bs->opaque; 408471799d1SStefan Hajnoczi 409471799d1SStefan Hajnoczi client->aio_context = new_context; 410471799d1SStefan Hajnoczi nfs_set_events(client); 411471799d1SStefan Hajnoczi } 412471799d1SStefan Hajnoczi 4136542aa9cSPeter Lieven static void nfs_client_close(NFSClient *client) 4146542aa9cSPeter Lieven { 4156542aa9cSPeter Lieven if (client->context) { 4166542aa9cSPeter Lieven if (client->fh) { 4176542aa9cSPeter Lieven nfs_close(client->context, client->fh); 4186542aa9cSPeter Lieven } 419dca21ef2SFam Zheng aio_set_fd_handler(client->aio_context, nfs_get_fd(client->context), 420f6a51c84SStefan Hajnoczi false, NULL, NULL, NULL, NULL); 4216542aa9cSPeter Lieven nfs_destroy_context(client->context); 4226542aa9cSPeter Lieven } 4236542aa9cSPeter Lieven memset(client, 0, sizeof(NFSClient)); 4246542aa9cSPeter Lieven } 4256542aa9cSPeter Lieven 4266542aa9cSPeter Lieven static void nfs_file_close(BlockDriverState *bs) 4276542aa9cSPeter Lieven { 4286542aa9cSPeter Lieven NFSClient *client = bs->opaque; 4296542aa9cSPeter Lieven nfs_client_close(client); 4306542aa9cSPeter Lieven } 4316542aa9cSPeter Lieven 43294d6a7a7SAshijeet Acharya static NFSServer *nfs_config(QDict *options, Error **errp) 43394d6a7a7SAshijeet Acharya { 43494d6a7a7SAshijeet Acharya NFSServer *server = NULL; 43594d6a7a7SAshijeet Acharya QDict *addr = NULL; 43694d6a7a7SAshijeet Acharya QObject *crumpled_addr = NULL; 43794d6a7a7SAshijeet Acharya Visitor *iv = NULL; 43894d6a7a7SAshijeet Acharya Error *local_error = NULL; 43994d6a7a7SAshijeet Acharya 44094d6a7a7SAshijeet Acharya qdict_extract_subqdict(options, &addr, "server."); 44194d6a7a7SAshijeet Acharya if (!qdict_size(addr)) { 44294d6a7a7SAshijeet Acharya error_setg(errp, "NFS server address missing"); 44394d6a7a7SAshijeet Acharya goto out; 44494d6a7a7SAshijeet Acharya } 44594d6a7a7SAshijeet Acharya 44694d6a7a7SAshijeet Acharya crumpled_addr = qdict_crumple(addr, errp); 44794d6a7a7SAshijeet Acharya if (!crumpled_addr) { 44894d6a7a7SAshijeet Acharya goto out; 44994d6a7a7SAshijeet Acharya } 45094d6a7a7SAshijeet Acharya 45194d6a7a7SAshijeet Acharya iv = qobject_input_visitor_new(crumpled_addr, true); 45294d6a7a7SAshijeet Acharya visit_type_NFSServer(iv, NULL, &server, &local_error); 45394d6a7a7SAshijeet Acharya if (local_error) { 45494d6a7a7SAshijeet Acharya error_propagate(errp, local_error); 45594d6a7a7SAshijeet Acharya goto out; 45694d6a7a7SAshijeet Acharya } 45794d6a7a7SAshijeet Acharya 45894d6a7a7SAshijeet Acharya out: 45994d6a7a7SAshijeet Acharya QDECREF(addr); 46094d6a7a7SAshijeet Acharya qobject_decref(crumpled_addr); 46194d6a7a7SAshijeet Acharya visit_free(iv); 46294d6a7a7SAshijeet Acharya return server; 46394d6a7a7SAshijeet Acharya } 46494d6a7a7SAshijeet Acharya 46594d6a7a7SAshijeet Acharya 46694d6a7a7SAshijeet Acharya static int64_t nfs_client_open(NFSClient *client, QDict *options, 46738f8d5e0SPeter Lieven int flags, Error **errp, int open_flags) 4686542aa9cSPeter Lieven { 46994d6a7a7SAshijeet Acharya int ret = -EINVAL; 47094d6a7a7SAshijeet Acharya QemuOpts *opts = NULL; 47194d6a7a7SAshijeet Acharya Error *local_err = NULL; 4726542aa9cSPeter Lieven struct stat st; 4736542aa9cSPeter Lieven char *file = NULL, *strp = NULL; 4746542aa9cSPeter Lieven 47594d6a7a7SAshijeet Acharya opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort); 47694d6a7a7SAshijeet Acharya qemu_opts_absorb_qdict(opts, options, &local_err); 47794d6a7a7SAshijeet Acharya if (local_err) { 47894d6a7a7SAshijeet Acharya error_propagate(errp, local_err); 47994d6a7a7SAshijeet Acharya ret = -EINVAL; 4806542aa9cSPeter Lieven goto fail; 4816542aa9cSPeter Lieven } 48294d6a7a7SAshijeet Acharya 48394d6a7a7SAshijeet Acharya client->path = g_strdup(qemu_opt_get(opts, "path")); 48494d6a7a7SAshijeet Acharya if (!client->path) { 48594d6a7a7SAshijeet Acharya ret = -EINVAL; 48694d6a7a7SAshijeet Acharya error_setg(errp, "No path was specified"); 4875f4d5e1aSMax Reitz goto fail; 4885f4d5e1aSMax Reitz } 48994d6a7a7SAshijeet Acharya 49094d6a7a7SAshijeet Acharya strp = strrchr(client->path, '/'); 4916542aa9cSPeter Lieven if (strp == NULL) { 4926542aa9cSPeter Lieven error_setg(errp, "Invalid URL specified"); 4936542aa9cSPeter Lieven goto fail; 4946542aa9cSPeter Lieven } 4956542aa9cSPeter Lieven file = g_strdup(strp); 4966542aa9cSPeter Lieven *strp = 0; 4976542aa9cSPeter Lieven 49894d6a7a7SAshijeet Acharya /* Pop the config into our state object, Exit if invalid */ 49994d6a7a7SAshijeet Acharya client->server = nfs_config(options, errp); 50094d6a7a7SAshijeet Acharya if (!client->server) { 50194d6a7a7SAshijeet Acharya ret = -EINVAL; 50294d6a7a7SAshijeet Acharya goto fail; 50394d6a7a7SAshijeet Acharya } 50494d6a7a7SAshijeet Acharya 5056542aa9cSPeter Lieven client->context = nfs_init_context(); 5066542aa9cSPeter Lieven if (client->context == NULL) { 5076542aa9cSPeter Lieven error_setg(errp, "Failed to init NFS context"); 5086542aa9cSPeter Lieven goto fail; 5096542aa9cSPeter Lieven } 5106542aa9cSPeter Lieven 51194d6a7a7SAshijeet Acharya if (qemu_opt_get(opts, "uid")) { 51294d6a7a7SAshijeet Acharya client->uid = qemu_opt_get_number(opts, "uid", 0); 51394d6a7a7SAshijeet Acharya nfs_set_uid(client->context, client->uid); 5146542aa9cSPeter Lieven } 51594d6a7a7SAshijeet Acharya 51694d6a7a7SAshijeet Acharya if (qemu_opt_get(opts, "gid")) { 51794d6a7a7SAshijeet Acharya client->gid = qemu_opt_get_number(opts, "gid", 0); 51894d6a7a7SAshijeet Acharya nfs_set_gid(client->context, client->gid); 5197c24384bSPeter Lieven } 52094d6a7a7SAshijeet Acharya 52194d6a7a7SAshijeet Acharya if (qemu_opt_get(opts, "tcp-syncnt")) { 52294d6a7a7SAshijeet Acharya client->tcp_syncnt = qemu_opt_get_number(opts, "tcp-syncnt", 0); 52394d6a7a7SAshijeet Acharya nfs_set_tcp_syncnt(client->context, client->tcp_syncnt); 52494d6a7a7SAshijeet Acharya } 52594d6a7a7SAshijeet Acharya 526f42ca3caSPeter Lieven #ifdef LIBNFS_FEATURE_READAHEAD 52794d6a7a7SAshijeet Acharya if (qemu_opt_get(opts, "readahead")) { 52838f8d5e0SPeter Lieven if (open_flags & BDRV_O_NOCACHE) { 52938f8d5e0SPeter Lieven error_setg(errp, "Cannot enable NFS readahead " 53038f8d5e0SPeter Lieven "if cache.direct = on"); 53138f8d5e0SPeter Lieven goto fail; 53238f8d5e0SPeter Lieven } 53394d6a7a7SAshijeet Acharya client->readahead = qemu_opt_get_number(opts, "readahead", 0); 53494d6a7a7SAshijeet Acharya if (client->readahead > QEMU_NFS_MAX_READAHEAD_SIZE) { 53529c838cdSPeter Lieven error_report("NFS Warning: Truncating NFS readahead " 53629c838cdSPeter Lieven "size to %d", QEMU_NFS_MAX_READAHEAD_SIZE); 53794d6a7a7SAshijeet Acharya client->readahead = QEMU_NFS_MAX_READAHEAD_SIZE; 53829c838cdSPeter Lieven } 53994d6a7a7SAshijeet Acharya nfs_set_readahead(client->context, client->readahead); 540d99b26c4SPeter Lieven #ifdef LIBNFS_FEATURE_PAGECACHE 541d99b26c4SPeter Lieven nfs_set_pagecache_ttl(client->context, 0); 542d99b26c4SPeter Lieven #endif 543d99b26c4SPeter Lieven client->cache_used = true; 54494d6a7a7SAshijeet Acharya } 545d99b26c4SPeter Lieven #endif 54694d6a7a7SAshijeet Acharya 547d99b26c4SPeter Lieven #ifdef LIBNFS_FEATURE_PAGECACHE 54894d6a7a7SAshijeet Acharya if (qemu_opt_get(opts, "pagecache")) { 549d99b26c4SPeter Lieven if (open_flags & BDRV_O_NOCACHE) { 550d99b26c4SPeter Lieven error_setg(errp, "Cannot enable NFS pagecache " 551d99b26c4SPeter Lieven "if cache.direct = on"); 552d99b26c4SPeter Lieven goto fail; 553d99b26c4SPeter Lieven } 55494d6a7a7SAshijeet Acharya client->pagecache = qemu_opt_get_number(opts, "pagecache", 0); 55594d6a7a7SAshijeet Acharya if (client->pagecache > QEMU_NFS_MAX_PAGECACHE_SIZE) { 556d99b26c4SPeter Lieven error_report("NFS Warning: Truncating NFS pagecache " 557d99b26c4SPeter Lieven "size to %d pages", QEMU_NFS_MAX_PAGECACHE_SIZE); 55894d6a7a7SAshijeet Acharya client->pagecache = QEMU_NFS_MAX_PAGECACHE_SIZE; 559d99b26c4SPeter Lieven } 56094d6a7a7SAshijeet Acharya nfs_set_pagecache(client->context, client->pagecache); 561d99b26c4SPeter Lieven nfs_set_pagecache_ttl(client->context, 0); 56238f8d5e0SPeter Lieven client->cache_used = true; 56394d6a7a7SAshijeet Acharya } 564f42ca3caSPeter Lieven #endif 56594d6a7a7SAshijeet Acharya 5667725b8bfSPeter Lieven #ifdef LIBNFS_FEATURE_DEBUG 56794d6a7a7SAshijeet Acharya if (qemu_opt_get(opts, "debug")) { 56894d6a7a7SAshijeet Acharya client->debug = qemu_opt_get_number(opts, "debug", 0); 5697725b8bfSPeter Lieven /* limit the maximum debug level to avoid potential flooding 5707725b8bfSPeter Lieven * of our log files. */ 57194d6a7a7SAshijeet Acharya if (client->debug > QEMU_NFS_MAX_DEBUG_LEVEL) { 5727725b8bfSPeter Lieven error_report("NFS Warning: Limiting NFS debug level " 5737725b8bfSPeter Lieven "to %d", QEMU_NFS_MAX_DEBUG_LEVEL); 57494d6a7a7SAshijeet Acharya client->debug = QEMU_NFS_MAX_DEBUG_LEVEL; 5757725b8bfSPeter Lieven } 57694d6a7a7SAshijeet Acharya nfs_set_debug(client->context, client->debug); 57794d6a7a7SAshijeet Acharya } 5787725b8bfSPeter Lieven #endif 5796542aa9cSPeter Lieven 58094d6a7a7SAshijeet Acharya ret = nfs_mount(client->context, client->server->host, client->path); 5816542aa9cSPeter Lieven if (ret < 0) { 5826542aa9cSPeter Lieven error_setg(errp, "Failed to mount nfs share: %s", 5836542aa9cSPeter Lieven nfs_get_error(client->context)); 5846542aa9cSPeter Lieven goto fail; 5856542aa9cSPeter Lieven } 5866542aa9cSPeter Lieven 5876542aa9cSPeter Lieven if (flags & O_CREAT) { 5886542aa9cSPeter Lieven ret = nfs_creat(client->context, file, 0600, &client->fh); 5896542aa9cSPeter Lieven if (ret < 0) { 5906542aa9cSPeter Lieven error_setg(errp, "Failed to create file: %s", 5916542aa9cSPeter Lieven nfs_get_error(client->context)); 5926542aa9cSPeter Lieven goto fail; 5936542aa9cSPeter Lieven } 5946542aa9cSPeter Lieven } else { 5956542aa9cSPeter Lieven ret = nfs_open(client->context, file, flags, &client->fh); 5966542aa9cSPeter Lieven if (ret < 0) { 5976542aa9cSPeter Lieven error_setg(errp, "Failed to open file : %s", 5986542aa9cSPeter Lieven nfs_get_error(client->context)); 5996542aa9cSPeter Lieven goto fail; 6006542aa9cSPeter Lieven } 6016542aa9cSPeter Lieven } 6026542aa9cSPeter Lieven 6036542aa9cSPeter Lieven ret = nfs_fstat(client->context, client->fh, &st); 6046542aa9cSPeter Lieven if (ret < 0) { 6056542aa9cSPeter Lieven error_setg(errp, "Failed to fstat file: %s", 6066542aa9cSPeter Lieven nfs_get_error(client->context)); 6076542aa9cSPeter Lieven goto fail; 6086542aa9cSPeter Lieven } 6096542aa9cSPeter Lieven 6106542aa9cSPeter Lieven ret = DIV_ROUND_UP(st.st_size, BDRV_SECTOR_SIZE); 61118a8056eSPeter Lieven client->st_blocks = st.st_blocks; 6126542aa9cSPeter Lieven client->has_zero_init = S_ISREG(st.st_mode); 61394d6a7a7SAshijeet Acharya *strp = '/'; 6146542aa9cSPeter Lieven goto out; 61594d6a7a7SAshijeet Acharya 6166542aa9cSPeter Lieven fail: 6176542aa9cSPeter Lieven nfs_client_close(client); 6186542aa9cSPeter Lieven out: 61994d6a7a7SAshijeet Acharya qemu_opts_del(opts); 6206542aa9cSPeter Lieven g_free(file); 6216542aa9cSPeter Lieven return ret; 6226542aa9cSPeter Lieven } 6236542aa9cSPeter Lieven 6246542aa9cSPeter Lieven static int nfs_file_open(BlockDriverState *bs, QDict *options, int flags, 6256542aa9cSPeter Lieven Error **errp) { 6266542aa9cSPeter Lieven NFSClient *client = bs->opaque; 6276542aa9cSPeter Lieven int64_t ret; 6286542aa9cSPeter Lieven 629471799d1SStefan Hajnoczi client->aio_context = bdrv_get_aio_context(bs); 630471799d1SStefan Hajnoczi 63194d6a7a7SAshijeet Acharya ret = nfs_client_open(client, options, 6326542aa9cSPeter Lieven (flags & BDRV_O_RDWR) ? O_RDWR : O_RDONLY, 63338f8d5e0SPeter Lieven errp, bs->open_flags); 6346542aa9cSPeter Lieven if (ret < 0) { 63594d6a7a7SAshijeet Acharya return ret; 6366542aa9cSPeter Lieven } 6376542aa9cSPeter Lieven bs->total_sectors = ret; 638810f4f86SFam Zheng ret = 0; 639810f4f86SFam Zheng return ret; 6406542aa9cSPeter Lieven } 6416542aa9cSPeter Lieven 642fd752801SMax Reitz static QemuOptsList nfs_create_opts = { 643fd752801SMax Reitz .name = "nfs-create-opts", 644fd752801SMax Reitz .head = QTAILQ_HEAD_INITIALIZER(nfs_create_opts.head), 645fd752801SMax Reitz .desc = { 646fd752801SMax Reitz { 647fd752801SMax Reitz .name = BLOCK_OPT_SIZE, 648fd752801SMax Reitz .type = QEMU_OPT_SIZE, 649fd752801SMax Reitz .help = "Virtual disk size" 650fd752801SMax Reitz }, 651fd752801SMax Reitz { /* end of list */ } 652fd752801SMax Reitz } 653fd752801SMax Reitz }; 654fd752801SMax Reitz 65598c10b81SChunyan Liu static int nfs_file_create(const char *url, QemuOpts *opts, Error **errp) 6566542aa9cSPeter Lieven { 6576542aa9cSPeter Lieven int ret = 0; 6586542aa9cSPeter Lieven int64_t total_size = 0; 6595839e53bSMarkus Armbruster NFSClient *client = g_new0(NFSClient, 1); 66094d6a7a7SAshijeet Acharya QDict *options = NULL; 6616542aa9cSPeter Lieven 662471799d1SStefan Hajnoczi client->aio_context = qemu_get_aio_context(); 663471799d1SStefan Hajnoczi 6646542aa9cSPeter Lieven /* Read out options */ 665c2eb918eSHu Tao total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), 666c2eb918eSHu Tao BDRV_SECTOR_SIZE); 6676542aa9cSPeter Lieven 66894d6a7a7SAshijeet Acharya options = qdict_new(); 66994d6a7a7SAshijeet Acharya ret = nfs_parse_uri(url, options, errp); 67094d6a7a7SAshijeet Acharya if (ret < 0) { 67194d6a7a7SAshijeet Acharya goto out; 67294d6a7a7SAshijeet Acharya } 67394d6a7a7SAshijeet Acharya 67494d6a7a7SAshijeet Acharya ret = nfs_client_open(client, options, O_CREAT, errp, 0); 6756542aa9cSPeter Lieven if (ret < 0) { 6766542aa9cSPeter Lieven goto out; 6776542aa9cSPeter Lieven } 6786542aa9cSPeter Lieven ret = nfs_ftruncate(client->context, client->fh, total_size); 6796542aa9cSPeter Lieven nfs_client_close(client); 6806542aa9cSPeter Lieven out: 68107555ba6SKevin Wolf QDECREF(options); 6826542aa9cSPeter Lieven g_free(client); 6836542aa9cSPeter Lieven return ret; 6846542aa9cSPeter Lieven } 6856542aa9cSPeter Lieven 6866542aa9cSPeter Lieven static int nfs_has_zero_init(BlockDriverState *bs) 6876542aa9cSPeter Lieven { 6886542aa9cSPeter Lieven NFSClient *client = bs->opaque; 6896542aa9cSPeter Lieven return client->has_zero_init; 6906542aa9cSPeter Lieven } 6916542aa9cSPeter Lieven 692d746427aSPaolo Bonzini static void 693d746427aSPaolo Bonzini nfs_get_allocated_file_size_cb(int ret, struct nfs_context *nfs, void *data, 694d746427aSPaolo Bonzini void *private_data) 695d746427aSPaolo Bonzini { 696d746427aSPaolo Bonzini NFSRPC *task = private_data; 697d746427aSPaolo Bonzini task->ret = ret; 698d746427aSPaolo Bonzini if (task->ret == 0) { 699d746427aSPaolo Bonzini memcpy(task->st, data, sizeof(struct stat)); 700d746427aSPaolo Bonzini } 701d746427aSPaolo Bonzini if (task->ret < 0) { 702d746427aSPaolo Bonzini error_report("NFS Error: %s", nfs_get_error(nfs)); 703d746427aSPaolo Bonzini } 704d746427aSPaolo Bonzini task->complete = 1; 705c9d1a561SPaolo Bonzini bdrv_wakeup(task->bs); 706d746427aSPaolo Bonzini } 707d746427aSPaolo Bonzini 7086542aa9cSPeter Lieven static int64_t nfs_get_allocated_file_size(BlockDriverState *bs) 7096542aa9cSPeter Lieven { 7106542aa9cSPeter Lieven NFSClient *client = bs->opaque; 7116542aa9cSPeter Lieven NFSRPC task = {0}; 7126542aa9cSPeter Lieven struct stat st; 7136542aa9cSPeter Lieven 71418a8056eSPeter Lieven if (bdrv_is_read_only(bs) && 71518a8056eSPeter Lieven !(bs->open_flags & BDRV_O_NOCACHE)) { 71618a8056eSPeter Lieven return client->st_blocks * 512; 71718a8056eSPeter Lieven } 71818a8056eSPeter Lieven 719d746427aSPaolo Bonzini task.bs = bs; 7206542aa9cSPeter Lieven task.st = &st; 721d746427aSPaolo Bonzini if (nfs_fstat_async(client->context, client->fh, nfs_get_allocated_file_size_cb, 7226542aa9cSPeter Lieven &task) != 0) { 7236542aa9cSPeter Lieven return -ENOMEM; 7246542aa9cSPeter Lieven } 7256542aa9cSPeter Lieven 7266542aa9cSPeter Lieven nfs_set_events(client); 727d746427aSPaolo Bonzini BDRV_POLL_WHILE(bs, !task.complete); 7286542aa9cSPeter Lieven 729055c6f91SPeter Lieven return (task.ret < 0 ? task.ret : st.st_blocks * 512); 7306542aa9cSPeter Lieven } 7316542aa9cSPeter Lieven 7326542aa9cSPeter Lieven static int nfs_file_truncate(BlockDriverState *bs, int64_t offset) 7336542aa9cSPeter Lieven { 7346542aa9cSPeter Lieven NFSClient *client = bs->opaque; 7356542aa9cSPeter Lieven return nfs_ftruncate(client->context, client->fh, offset); 7366542aa9cSPeter Lieven } 7376542aa9cSPeter Lieven 73818a8056eSPeter Lieven /* Note that this will not re-establish a connection with the NFS server 73918a8056eSPeter Lieven * - it is effectively a NOP. */ 74018a8056eSPeter Lieven static int nfs_reopen_prepare(BDRVReopenState *state, 74118a8056eSPeter Lieven BlockReopenQueue *queue, Error **errp) 74218a8056eSPeter Lieven { 74318a8056eSPeter Lieven NFSClient *client = state->bs->opaque; 74418a8056eSPeter Lieven struct stat st; 74518a8056eSPeter Lieven int ret = 0; 74618a8056eSPeter Lieven 74718a8056eSPeter Lieven if (state->flags & BDRV_O_RDWR && bdrv_is_read_only(state->bs)) { 74818a8056eSPeter Lieven error_setg(errp, "Cannot open a read-only mount as read-write"); 74918a8056eSPeter Lieven return -EACCES; 75018a8056eSPeter Lieven } 75118a8056eSPeter Lieven 75238f8d5e0SPeter Lieven if ((state->flags & BDRV_O_NOCACHE) && client->cache_used) { 753d99b26c4SPeter Lieven error_setg(errp, "Cannot disable cache if libnfs readahead or" 754d99b26c4SPeter Lieven " pagecache is enabled"); 75538f8d5e0SPeter Lieven return -EINVAL; 75638f8d5e0SPeter Lieven } 75738f8d5e0SPeter Lieven 75818a8056eSPeter Lieven /* Update cache for read-only reopens */ 75918a8056eSPeter Lieven if (!(state->flags & BDRV_O_RDWR)) { 76018a8056eSPeter Lieven ret = nfs_fstat(client->context, client->fh, &st); 76118a8056eSPeter Lieven if (ret < 0) { 76218a8056eSPeter Lieven error_setg(errp, "Failed to fstat file: %s", 76318a8056eSPeter Lieven nfs_get_error(client->context)); 76418a8056eSPeter Lieven return ret; 76518a8056eSPeter Lieven } 76618a8056eSPeter Lieven client->st_blocks = st.st_blocks; 76718a8056eSPeter Lieven } 76818a8056eSPeter Lieven 76918a8056eSPeter Lieven return 0; 77018a8056eSPeter Lieven } 77118a8056eSPeter Lieven 77294d6a7a7SAshijeet Acharya static void nfs_refresh_filename(BlockDriverState *bs, QDict *options) 77394d6a7a7SAshijeet Acharya { 77494d6a7a7SAshijeet Acharya NFSClient *client = bs->opaque; 77594d6a7a7SAshijeet Acharya QDict *opts = qdict_new(); 77694d6a7a7SAshijeet Acharya QObject *server_qdict; 77794d6a7a7SAshijeet Acharya Visitor *ov; 77894d6a7a7SAshijeet Acharya 77994d6a7a7SAshijeet Acharya qdict_put(opts, "driver", qstring_from_str("nfs")); 78094d6a7a7SAshijeet Acharya 78194d6a7a7SAshijeet Acharya if (client->uid && !client->gid) { 78294d6a7a7SAshijeet Acharya snprintf(bs->exact_filename, sizeof(bs->exact_filename), 78394d6a7a7SAshijeet Acharya "nfs://%s%s?uid=%" PRId64, client->server->host, client->path, 78494d6a7a7SAshijeet Acharya client->uid); 78594d6a7a7SAshijeet Acharya } else if (!client->uid && client->gid) { 78694d6a7a7SAshijeet Acharya snprintf(bs->exact_filename, sizeof(bs->exact_filename), 78794d6a7a7SAshijeet Acharya "nfs://%s%s?gid=%" PRId64, client->server->host, client->path, 78894d6a7a7SAshijeet Acharya client->gid); 78994d6a7a7SAshijeet Acharya } else if (client->uid && client->gid) { 79094d6a7a7SAshijeet Acharya snprintf(bs->exact_filename, sizeof(bs->exact_filename), 79194d6a7a7SAshijeet Acharya "nfs://%s%s?uid=%" PRId64 "&gid=%" PRId64, 79294d6a7a7SAshijeet Acharya client->server->host, client->path, client->uid, client->gid); 79394d6a7a7SAshijeet Acharya } else { 79494d6a7a7SAshijeet Acharya snprintf(bs->exact_filename, sizeof(bs->exact_filename), 79594d6a7a7SAshijeet Acharya "nfs://%s%s", client->server->host, client->path); 79694d6a7a7SAshijeet Acharya } 79794d6a7a7SAshijeet Acharya 79894d6a7a7SAshijeet Acharya ov = qobject_output_visitor_new(&server_qdict); 79994d6a7a7SAshijeet Acharya visit_type_NFSServer(ov, NULL, &client->server, &error_abort); 80094d6a7a7SAshijeet Acharya visit_complete(ov, &server_qdict); 80194d6a7a7SAshijeet Acharya assert(qobject_type(server_qdict) == QTYPE_QDICT); 80294d6a7a7SAshijeet Acharya 80394d6a7a7SAshijeet Acharya qdict_put_obj(opts, "server", server_qdict); 80494d6a7a7SAshijeet Acharya qdict_put(opts, "path", qstring_from_str(client->path)); 80594d6a7a7SAshijeet Acharya 80694d6a7a7SAshijeet Acharya if (client->uid) { 80794d6a7a7SAshijeet Acharya qdict_put(opts, "uid", qint_from_int(client->uid)); 80894d6a7a7SAshijeet Acharya } 80994d6a7a7SAshijeet Acharya if (client->gid) { 81094d6a7a7SAshijeet Acharya qdict_put(opts, "gid", qint_from_int(client->gid)); 81194d6a7a7SAshijeet Acharya } 81294d6a7a7SAshijeet Acharya if (client->tcp_syncnt) { 81394d6a7a7SAshijeet Acharya qdict_put(opts, "tcp-syncnt", 81494d6a7a7SAshijeet Acharya qint_from_int(client->tcp_syncnt)); 81594d6a7a7SAshijeet Acharya } 81694d6a7a7SAshijeet Acharya if (client->readahead) { 81794d6a7a7SAshijeet Acharya qdict_put(opts, "readahead", 81894d6a7a7SAshijeet Acharya qint_from_int(client->readahead)); 81994d6a7a7SAshijeet Acharya } 82094d6a7a7SAshijeet Acharya if (client->pagecache) { 82194d6a7a7SAshijeet Acharya qdict_put(opts, "pagecache", 82294d6a7a7SAshijeet Acharya qint_from_int(client->pagecache)); 82394d6a7a7SAshijeet Acharya } 82494d6a7a7SAshijeet Acharya if (client->debug) { 82594d6a7a7SAshijeet Acharya qdict_put(opts, "debug", qint_from_int(client->debug)); 82694d6a7a7SAshijeet Acharya } 82794d6a7a7SAshijeet Acharya 82894d6a7a7SAshijeet Acharya visit_free(ov); 82994d6a7a7SAshijeet Acharya qdict_flatten(opts); 83094d6a7a7SAshijeet Acharya bs->full_open_options = opts; 83194d6a7a7SAshijeet Acharya } 83294d6a7a7SAshijeet Acharya 833d99b26c4SPeter Lieven #ifdef LIBNFS_FEATURE_PAGECACHE 834d99b26c4SPeter Lieven static void nfs_invalidate_cache(BlockDriverState *bs, 835d99b26c4SPeter Lieven Error **errp) 836d99b26c4SPeter Lieven { 837d99b26c4SPeter Lieven NFSClient *client = bs->opaque; 838d99b26c4SPeter Lieven nfs_pagecache_invalidate(client->context, client->fh); 839d99b26c4SPeter Lieven } 840d99b26c4SPeter Lieven #endif 841d99b26c4SPeter Lieven 8426542aa9cSPeter Lieven static BlockDriver bdrv_nfs = { 8436542aa9cSPeter Lieven .format_name = "nfs", 8446542aa9cSPeter Lieven .protocol_name = "nfs", 8456542aa9cSPeter Lieven 8466542aa9cSPeter Lieven .instance_size = sizeof(NFSClient), 84794d6a7a7SAshijeet Acharya .bdrv_parse_filename = nfs_parse_filename, 848fd752801SMax Reitz .create_opts = &nfs_create_opts, 849fd752801SMax Reitz 8506542aa9cSPeter Lieven .bdrv_has_zero_init = nfs_has_zero_init, 8516542aa9cSPeter Lieven .bdrv_get_allocated_file_size = nfs_get_allocated_file_size, 8526542aa9cSPeter Lieven .bdrv_truncate = nfs_file_truncate, 8536542aa9cSPeter Lieven 8546542aa9cSPeter Lieven .bdrv_file_open = nfs_file_open, 8556542aa9cSPeter Lieven .bdrv_close = nfs_file_close, 856c282e1fdSChunyan Liu .bdrv_create = nfs_file_create, 85718a8056eSPeter Lieven .bdrv_reopen_prepare = nfs_reopen_prepare, 8586542aa9cSPeter Lieven 8596542aa9cSPeter Lieven .bdrv_co_readv = nfs_co_readv, 8606542aa9cSPeter Lieven .bdrv_co_writev = nfs_co_writev, 8616542aa9cSPeter Lieven .bdrv_co_flush_to_disk = nfs_co_flush, 862471799d1SStefan Hajnoczi 863471799d1SStefan Hajnoczi .bdrv_detach_aio_context = nfs_detach_aio_context, 864471799d1SStefan Hajnoczi .bdrv_attach_aio_context = nfs_attach_aio_context, 86594d6a7a7SAshijeet Acharya .bdrv_refresh_filename = nfs_refresh_filename, 866d99b26c4SPeter Lieven 867d99b26c4SPeter Lieven #ifdef LIBNFS_FEATURE_PAGECACHE 868d99b26c4SPeter Lieven .bdrv_invalidate_cache = nfs_invalidate_cache, 869d99b26c4SPeter Lieven #endif 8706542aa9cSPeter Lieven }; 8716542aa9cSPeter Lieven 8726542aa9cSPeter Lieven static void nfs_block_init(void) 8736542aa9cSPeter Lieven { 8746542aa9cSPeter Lieven bdrv_register(&bdrv_nfs); 8756542aa9cSPeter Lieven } 8766542aa9cSPeter Lieven 8776542aa9cSPeter Lieven block_init(nfs_block_init); 878