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 WIN32
  21 #include "win32_compat.h"
  22 #else
  23 #include <sys/stat.h>
  24 #include <fcntl.h>
  25 #include <poll.h>
  26 #endif
  27
  28 #define SERVER "10.1.1.27"
  29 #define EXPORT "/VIRTUAL"
  30 #define NFSFILE "/BOOKS/Classics/Dracula.djvu"
  31 #define NFSDIR "/BOOKS/Classics/"
  32
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <stdint.h>
  36 #include <sys/types.h>
  37 #include <unistd.h>
  38 #include "libnfs.h"
  39 #include "libnfs-raw.h"
  40 #include "libnfs-raw-mount.h"
  41
  42 struct rpc_context *mount_context;
  43
  44 struct client {
  45        char *server;
  46        char *export;
  47        uint32_t mount_port;
  48        struct nfsfh *nfsfh;
  49        int is_finished;
  50 };
  51
  52 void mount_export_cb(struct rpc_context *mount_context, int status, void *data, void *private_data)
  53 {
  54         struct client *client = private_data;
  55         exports export = *(exports *)data;
  56
  57         if (status < 0) {
  58                 printf("MOUNT/EXPORT failed with \"%s\"\n", rpc_get_error(mount_context));
  59                 exit(10);
  60         }
  61
  62         printf("Got exports list from server %s\n", client->server);
  63         while (export != NULL) {
  64               printf("Export: %s\n", export->ex_dir);
  65               export = export->ex_next;
  66         }
  67
  68         mount_context = NULL;
  69
  70         client->is_finished = 1;
  71 }
  72
  73 void nfs_opendir_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
  74 {
  75         struct client *client = private_data;
  76         struct nfsdir *nfsdir = data;
  77         struct nfsdirent *nfsdirent;
  78
  79         if (status < 0) {
  80                 printf("opendir failed with \"%s\"\n", (char *)data);
  81                 exit(10);
  82         }
  83
  84         printf("opendir successful\n");
  85         while((nfsdirent = nfs_readdir(nfs, nfsdir)) != NULL) {
  86                 printf("Inode:%d Name:%s\n", (int)nfsdirent->inode, nfsdirent->name);
  87         }
  88         nfs_closedir(nfs, nfsdir);
  89
  90         mount_context = rpc_init_context();
  91         if (mount_getexports_async(mount_context, client->server, mount_export_cb, client) != 0) {
  92                 printf("Failed to start MOUNT/EXPORT\n");
  93                 exit(10);
  94         }
  95 }
  96
  97 void nfs_close_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
  98 {
  99         struct client *client = private_data;
 100
 101         if (status < 0) {
 102                 printf("close failed with \"%s\"\n", (char *)data);
 103                 exit(10);
 104         }
 105
 106         printf("close successful\n");
 107         printf("call opendir(%s)\n", NFSDIR);
 108         if (nfs_opendir_async(nfs, NFSDIR, nfs_opendir_cb, client) != 0) {
 109                 printf("Failed to start async nfs close\n");
 110                 exit(10);
 111         }
 112 }
 113
 114 void nfs_fstat_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
 115 {
 116         struct client *client = private_data;
 117         struct stat *st;
 118
 119         if (status < 0) {
 120                 printf("fstat call failed with \"%s\"\n", (char *)data);
 121                 exit(10);
 122         }
 123
 124         printf("Got reply from server for fstat(%s).\n", NFSFILE);
 125         st = (struct stat *)data;
 126         printf("Mode %04o\n", st->st_mode);
 127         printf("Size %d\n", (int)st->st_size);
 128         printf("Inode %04o\n", (int)st->st_ino);
 129
 130         printf("Close file\n");
 131         if (nfs_close_async(nfs, client->nfsfh, nfs_close_cb, client) != 0) {
 132                 printf("Failed to start async nfs close\n");
 133                 exit(10);
 134         }
 135 }
 136
 137 void nfs_read_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
 138 {
 139         struct client *client = private_data;
 140         char *read_data;
 141         int i;
 142
 143         if (status < 0) {
 144                 printf("read failed with \"%s\"\n", (char *)data);
 145                 exit(10);
 146         }
 147
 148         printf("read successful with %d bytes of data\n", status);
 149         read_data = data;
 150         for (i=0;i<16;i++) {
 151                 printf("%02x ", read_data[i]&0xff);
 152         }
 153         printf("\n");
 154         printf("Fstat file :%s\n", NFSFILE);
 155         if (nfs_fstat_async(nfs, client->nfsfh, nfs_fstat_cb, client) != 0) {
 156                 printf("Failed to start async nfs fstat\n");
 157                 exit(10);
 158         }
 159 }
 160
 161 void nfs_open_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
 162 {
 163         struct client *client = private_data;
 164         struct nfsfh *nfsfh;
 165
 166         if (status < 0) {
 167                 printf("open call failed with \"%s\"\n", (char *)data);
 168                 exit(10);
 169         }
 170
 171         nfsfh         = data;
 172         client->nfsfh = nfsfh;
 173         printf("Got reply from server for open(%s). Handle:%p\n", NFSFILE, data);
 174         printf("Read first 64 bytes\n");
 175         if (nfs_pread_async(nfs, nfsfh, 0, 64, nfs_read_cb, client) != 0) {
 176                 printf("Failed to start async nfs open\n");
 177                 exit(10);
 178         }
 179 }
 180
 181 void nfs_stat_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
 182 {
 183         struct client *client = private_data;
 184         struct stat *st;
 185
 186         if (status < 0) {
 187                 printf("stat call failed with \"%s\"\n", (char *)data);
 188                 exit(10);
 189         }
 190
 191         printf("Got reply from server for stat(%s).\n", NFSFILE);
 192         st = (struct stat *)data;
 193         printf("Mode %04o\n", st->st_mode);
 194         printf("Size %d\n", (int)st->st_size);
 195         printf("Inode %04o\n", (int)st->st_ino);
 196
 197         printf("Open file for reading :%s\n", NFSFILE);
 198         if (nfs_open_async(nfs, NFSFILE, O_RDONLY, nfs_open_cb, client) != 0) {
 199                 printf("Failed to start async nfs open\n");
 200                 exit(10);
 201         }
 202 }
 203
 204 void nfs_mount_cb(int status, struct nfs_context *nfs, void *data, void *private_data)
 205 {
 206         struct client *client = private_data;
 207
 208         if (status < 0) {
 209                 printf("mount/mnt call failed with \"%s\"\n", (char *)data);
 210                 exit(10);
 211         }
 212
 213         printf("Got reply from server for MOUNT/MNT procedure.\n");
 214         printf("Stat file :%s\n", NFSFILE);
 215         if (nfs_stat_async(nfs, NFSFILE, nfs_stat_cb, client) != 0) {
 216                 printf("Failed to start async nfs stat\n");
 217                 exit(10);
 218         }
 219 }
 220
 221
 222
 223 int main(int argc _U_, char *argv[] _U_)
 224 {
 225         struct nfs_context *nfs;
 226         int ret;
 227         struct client client;
 228         struct pollfd pfds[2]; /* nfs:0  mount:1 */
 229
 230         client.server = SERVER;
 231         client.export = EXPORT;
 232         client.is_finished = 0;
 233
 234         nfs = nfs_init_context();
 235         if (nfs == NULL) {
 236                 printf("failed to init context\n");
 237                 exit(10);
 238         }
 239
 240         ret = nfs_mount_async(nfs, client.server, client.export, nfs_mount_cb, &client);
 241         if (ret != 0) {
 242                 printf("Failed to start async nfs mount\n");
 243                 exit(10);
 244         }
 245
 246         for (;;) {
 247                 int num_fds;
 248
 249                 pfds[0].fd = nfs_get_fd(nfs);
 250                 pfds[0].events = nfs_which_events(nfs);
 251                 num_fds = 1;
 252
 253                 if (mount_context != 0 && rpc_get_fd(mount_context) != -1) {
 254                         pfds[1].fd = rpc_get_fd(mount_context);
 255                         pfds[1].events = rpc_which_events(mount_context);
 256                         num_fds = 2;
 257                 }
 258                 if (poll(&pfds[0], 2, -1) < 0) {
 259                         printf("Poll failed");
 260                         exit(10);
 261                 }
 262                 if (mount_context != NULL) {
 263                         if (rpc_service(mount_context, pfds[1].revents) < 0) {
 264                                 printf("rpc_service failed\n");
 265                                 break;
 266                         }
 267                 }
 268                 if (nfs_service(nfs, pfds[0].revents) < 0) {
 269                         printf("nfs_service failed\n");
 270                         break;
 271                 }
 272                 if (client.is_finished) {
 273                         break;
 274                 }
 275         }
 276
 277         nfs_destroy_context(nfs);
 278         if (mount_context != NULL) {
 279                 rpc_destroy_context(mount_context);
 280                 mount_context = NULL;
 281         }
 282         printf("nfsclient finished\n");
 283         return 0;
 284 }