examples/nfsclient-async.c

   1 /*
   2    Copyright (C) by Ronnie Sahlberg <ronniesahlberg@gmail.com> 2010
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18 /* Example program using the highlevel async interface.
  19  */
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #ifdef WIN32
  25 #include "win32_compat.h"
  26 #else
  27 #include <sys/stat.h>
  28 #endif
  29
  30 #ifdef HAVE_POLL_H
  31 #include <poll.h>
  32 #endif
  33
  34 #ifdef HAVE_UNISTD_H
  35 #include <unistd.h>
  36 #endif
  37
  38 #define SERVER "10.1.1.27"
  39 #define EXPORT "/VIRTUAL"
  40 #define NFSFILE "/BOOKS/Classics/Dracula.djvu"
  41 #define NFSDIR "/BOOKS/Classics/"
  42
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <stdint.h>
  46 #include <sys/types.h>
  47 #include <fcntl.h>
  48 #include "libnfs.h"
  49 #include "libnfs-raw.h"
  50 #include "libnfs-raw-mount.h"
  51
  52 struct rpc_context *mount_context;
  53
  54 struct client {
  55        char *server;
  56        char *export;
  57        uint32_t mount_port;
  58        struct nfsfh *nfsfh;
  59        int is_finished;
  60 };
  61
  62 void mount_export_cb(struct rpc_context *mount_context, int status, void *data, void *private_data)
  63 {
  64         struct client *client = private_data;
  65         exports export = *(exports *)data;
  66
  67         if (status < 0) {
  68                 printf("MOUNT/EXPORT failed with \"%s\"\n", rpc_get_error(mount_context));
  69                 exit(10);
  70         }
  71
  72         printf("Got exports list from server %s\n", client->server);
  73         while (export != NULL) {
  74               printf("Export: %s\n", export->ex_dir);
  75               export = export->ex_next;
  76         }
  77
  78         mount_context = NULL;
  79
  80         client->is_finished = 1;
  81 }
  82
  83 void nfs_opendir_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
  84 {
  85         struct client *client = private_data;
  86         struct nfsdir *nfsdir = data;
  87         struct nfsdirent *nfsdirent;
  88
  89         if (status < 0) {
  90                 printf("opendir failed with \"%s\"\n", (char *)data);
  91                 exit(10);
  92         }
  93
  94         printf("opendir successful\n");
  95         while((nfsdirent = nfs_readdir(nfs, nfsdir)) != NULL) {
  96                 printf("Inode:%d Name:%s\n", (int)nfsdirent->inode, nfsdirent->name);
  97         }
  98         nfs_closedir(nfs, nfsdir);
  99
 100         mount_context = rpc_init_context();
 101         if (mount_getexports_async(mount_context, client->server, mount_export_cb, client) != 0) {
 102                 printf("Failed to start MOUNT/EXPORT\n");
 103                 exit(10);
 104         }
 105 }
 106
 107 void nfs_close_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
 108 {
 109         struct client *client = private_data;
 110
 111         if (status < 0) {
 112                 printf("close failed with \"%s\"\n", (char *)data);
 113                 exit(10);
 114         }
 115
 116         printf("close successful\n");
 117         printf("call opendir(%s)\n", NFSDIR);
 118         if (nfs_opendir_async(nfs, NFSDIR, nfs_opendir_cb, client) != 0) {
 119                 printf("Failed to start async nfs close\n");
 120                 exit(10);
 121         }
 122 }
 123
 124 void nfs_fstat_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
 125 {
 126         struct client *client = private_data;
 127         struct stat *st;
 128
 129         if (status < 0) {
 130                 printf("fstat call failed with \"%s\"\n", (char *)data);
 131                 exit(10);
 132         }
 133
 134         printf("Got reply from server for fstat(%s).\n", NFSFILE);
 135         st = (struct stat *)data;
 136         printf("Mode %04o\n", st->st_mode);
 137         printf("Size %d\n", (int)st->st_size);
 138         printf("Inode %04o\n", (int)st->st_ino);
 139
 140         printf("Close file\n");
 141         if (nfs_close_async(nfs, client->nfsfh, nfs_close_cb, client) != 0) {
 142                 printf("Failed to start async nfs close\n");
 143                 exit(10);
 144         }
 145 }
 146
 147 void nfs_read_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
 148 {
 149         struct client *client = private_data;
 150         char *read_data;
 151         int i;
 152
 153         if (status < 0) {
 154                 printf("read failed with \"%s\"\n", (char *)data);
 155                 exit(10);
 156         }
 157
 158         printf("read successful with %d bytes of data\n", status);
 159         read_data = data;
 160         for (i=0;i<16;i++) {
 161                 printf("%02x ", read_data[i]&0xff);
 162         }
 163         printf("\n");
 164         printf("Fstat file :%s\n", NFSFILE);
 165         if (nfs_fstat_async(nfs, client->nfsfh, nfs_fstat_cb, client) != 0) {
 166                 printf("Failed to start async nfs fstat\n");
 167                 exit(10);
 168         }
 169 }
 170
 171 void nfs_open_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
 172 {
 173         struct client *client = private_data;
 174         struct nfsfh *nfsfh;
 175
 176         if (status < 0) {
 177                 printf("open call failed with \"%s\"\n", (char *)data);
 178                 exit(10);
 179         }
 180
 181         nfsfh         = data;
 182         client->nfsfh = nfsfh;
 183         printf("Got reply from server for open(%s). Handle:%p\n", NFSFILE, data);
 184         printf("Read first 64 bytes\n");
 185         if (nfs_pread_async(nfs, nfsfh, 0, 64, nfs_read_cb, client) != 0) {
 186                 printf("Failed to start async nfs open\n");
 187                 exit(10);
 188         }
 189 }
 190
 191 void nfs_stat_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
 192 {
 193         struct client *client = private_data;
 194         struct stat *st;
 195
 196         if (status < 0) {
 197                 printf("stat call failed with \"%s\"\n", (char *)data);
 198                 exit(10);
 199         }
 200
 201         printf("Got reply from server for stat(%s).\n", NFSFILE);
 202         st = (struct stat *)data;
 203         printf("Mode %04o\n", st->st_mode);
 204         printf("Size %d\n", (int)st->st_size);
 205         printf("Inode %04o\n", (int)st->st_ino);
 206
 207         printf("Open file for reading :%s\n", NFSFILE);
 208         if (nfs_open_async(nfs, NFSFILE, O_RDONLY, nfs_open_cb, client) != 0) {
 209                 printf("Failed to start async nfs open\n");
 210                 exit(10);
 211         }
 212 }
 213
 214 void nfs_mount_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
 215 {
 216         struct client *client = private_data;
 217
 218         if (status < 0) {
 219                 printf("mount/mnt call failed with \"%s\"\n", (char *)data);
 220                 exit(10);
 221         }
 222
 223         printf("Got reply from server for MOUNT/MNT procedure.\n");
 224         printf("Stat file :%s\n", NFSFILE);
 225         if (nfs_stat_async(nfs, NFSFILE, nfs_stat_cb, client) != 0) {
 226                 printf("Failed to start async nfs stat\n");
 227                 exit(10);
 228         }
 229 }
 230
 231
 232
 233 int main(int argc _U_, char *argv[] _U_)
 234 {
 235         struct nfs_context *nfs;
 236         int ret;
 237         struct client client;
 238         struct pollfd pfds[2]; /* nfs:0  mount:1 */
 239
 240         client.server = SERVER;
 241         client.export = EXPORT;
 242         client.is_finished = 0;
 243
 244         nfs = nfs_init_context();
 245         if (nfs == NULL) {
 246                 printf("failed to init context\n");
 247                 exit(10);
 248         }
 249
 250         ret = nfs_mount_async(nfs, client.server, client.export, nfs_mount_cb, &client);
 251         if (ret != 0) {
 252                 printf("Failed to start async nfs mount\n");
 253                 exit(10);
 254         }
 255
 256         for (;;) {
 257                 int num_fds;
 258
 259                 pfds[0].fd = nfs_get_fd(nfs);
 260                 pfds[0].events = nfs_which_events(nfs);
 261                 num_fds = 1;
 262
 263                 if (mount_context != 0 && rpc_get_fd(mount_context) != -1) {
 264                         pfds[1].fd = rpc_get_fd(mount_context);
 265                         pfds[1].events = rpc_which_events(mount_context);
 266                         num_fds = 2;
 267                 }
 268                 if (poll(&pfds[0], 2, -1) < 0) {
 269                         printf("Poll failed");
 270                         exit(10);
 271                 }
 272                 if (mount_context != NULL) {
 273                         if (rpc_service(mount_context, pfds[1].revents) < 0) {
 274                                 printf("rpc_service failed\n");
 275                                 break;
 276                         }
 277                 }
 278                 if (nfs_service(nfs, pfds[0].revents) < 0) {
 279                         printf("nfs_service failed\n");
 280                         break;
 281                 }
 282                 if (client.is_finished) {
 283                         break;
 284                 }
 285         }
 286
 287         nfs_destroy_context(nfs);
 288         if (mount_context != NULL) {
 289                 rpc_destroy_context(mount_context);
 290                 mount_context = NULL;
 291         }
 292         printf("nfsclient finished\n");
 293         return 0;
 294 }