lib/init.c

   1 /*
   2    Copyright (C) 2010 by Ronnie Sahlberg <ronniesahlberg@gmail.com>
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU Lesser General Public License as published by
   6    the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public License
  15    along with this program; if not, see <http://www.gnu.org/licenses/>.
  16 */
  17 #ifdef HAVE_CONFIG_H
  18 #include "config.h"
  19 #endif
  20
  21 #ifdef AROS
  22 #include "aros_compat.h"
  23 #endif
  24
  25 #ifdef WIN32
  26 #include "win32_compat.h"
  27 #endif
  28
  29 #define _GNU_SOURCE
  30
  31 #ifdef HAVE_UNISTD_H
  32 #include <unistd.h>
  33 #endif
  34
  35 #ifdef HAVE_STRINGS_H
  36 #include <strings.h>
  37 #endif
  38
  39 #include <stdio.h>
  40 #include <stdarg.h>
  41 #include <string.h>
  42 #include <stdlib.h>
  43 #include <assert.h>
  44 #include <time.h>
  45 #include "slist.h"
  46 #include "libnfs-zdr.h"
  47 #include "libnfs.h"
  48 #include "libnfs-raw.h"
  49 #include "libnfs-private.h"
  50
  51 struct rpc_context *rpc_init_context(void)
  52 {
  53         struct rpc_context *rpc;
  54         static uint32_t salt = 0;
  55         unsigned int i;
  56
  57         rpc = malloc(sizeof(struct rpc_context));
  58         if (rpc == NULL) {
  59                 return NULL;
  60         }
  61         memset(rpc, 0, sizeof(struct rpc_context));
  62
  63         rpc->magic = RPC_CONTEXT_MAGIC;
  64
  65         /* Allow 1M of data (for writes) and some */
  66         rpc->encodebuflen = 1024 * 1024 + 4096;
  67         rpc->encodebuf = malloc(rpc->encodebuflen);
  68         if (rpc->encodebuf == NULL) {
  69                 free(rpc);
  70                 return NULL;
  71         }
  72
  73         rpc->auth = authunix_create_default();
  74         if (rpc->auth == NULL) {
  75                 free(rpc->encodebuf);
  76                 free(rpc);
  77                 return NULL;
  78         }
  79         rpc->xid = salt + time(NULL) + getpid() << 16;
  80         salt += 0x01000000;
  81         rpc->fd = -1;
  82         rpc->tcp_syncnt = RPC_PARAM_UNDEFINED;
  83 #if defined(WIN32) || defined(ANDROID)
  84         rpc->uid = 65534;
  85         rpc->gid = 65534;
  86 #else
  87         rpc->uid = getuid();
  88         rpc->gid = getgid();
  89 #endif
  90         rpc_reset_queue(&rpc->outqueue);
  91         for (i = 0; i < HASHES; i++)
  92                 rpc_reset_queue(&rpc->waitpdu[i]);
  93
  94         return rpc;
  95 }
  96
  97 void rpc_set_readahead(struct rpc_context *rpc, uint32_t v)
  98 {
  99         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 100
 101         rpc->readahead = v;
 102 }
 103
 104 struct rpc_context *rpc_init_udp_context(void)
 105 {
 106         struct rpc_context *rpc;
 107
 108         rpc = rpc_init_context();
 109         if (rpc != NULL) {
 110                 rpc->is_udp = 1;
 111         }
 112
 113         return rpc;
 114 }
 115
 116 void rpc_set_auth(struct rpc_context *rpc, struct AUTH *auth)
 117 {
 118         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 119
 120         if (rpc->auth != NULL) {
 121                 auth_destroy(rpc->auth);
 122         }
 123         rpc->auth = auth;
 124 }
 125
 126 static void rpc_set_uid_gid(struct rpc_context *rpc, int uid, int gid) {
 127         if (uid != rpc->uid || gid != rpc->gid) {
 128                 struct AUTH *auth = libnfs_authunix_create("libnfs", uid, gid, 0, NULL);
 129                 if (auth != NULL) {
 130                         rpc_set_auth(rpc, auth);
 131                         rpc->uid = uid;
 132                         rpc->gid = gid;
 133                 }
 134         }
 135 }
 136
 137 void rpc_set_uid(struct rpc_context *rpc, int uid) {
 138         rpc_set_uid_gid(rpc, uid, rpc->gid);
 139 }
 140
 141 void rpc_set_gid(struct rpc_context *rpc, int gid) {
 142         rpc_set_uid_gid(rpc, rpc->uid, gid);
 143 }
 144
 145 void rpc_set_error(struct rpc_context *rpc, char *error_string, ...)
 146 {
 147         va_list ap;
 148         char *old_error_string = rpc->error_string;
 149
 150         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 151
 152         va_start(ap, error_string);
 153         rpc->error_string = malloc(1024);
 154         vsnprintf(rpc->error_string, 1024, error_string, ap);
 155         va_end(ap);
 156
 157         if (old_error_string != NULL) {
 158                 free(old_error_string);
 159         }
 160 }
 161
 162 char *rpc_get_error(struct rpc_context *rpc)
 163 {
 164         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 165
 166         return rpc->error_string;
 167 }
 168
 169 void rpc_error_all_pdus(struct rpc_context *rpc, char *error)
 170 {
 171         struct rpc_pdu *pdu, *next;
 172         unsigned int i;
 173
 174         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 175
 176         while ((pdu = rpc->outqueue.head) != NULL) {
 177                 pdu->cb(rpc, RPC_STATUS_ERROR, error, pdu->private_data);
 178                 rpc->outqueue.head = pdu->next;
 179                 rpc_free_pdu(rpc, pdu);
 180         }
 181         rpc->outqueue.tail = NULL;
 182
 183         for (i = 0; i < HASHES; i++) {
 184                 struct rpc_queue *q = &rpc->waitpdu[i];
 185
 186                 while((pdu = q->head) != NULL) {
 187                         pdu->cb(rpc, RPC_STATUS_ERROR, error, pdu->private_data);
 188                         q->head = pdu->next;
 189                         rpc_free_pdu(rpc, pdu);
 190                 }
 191                 q->tail = NULL;
 192         }
 193 }
 194
 195 static void rpc_free_fragment(struct rpc_fragment *fragment)
 196 {
 197         if (fragment->data != NULL) {
 198                 free(fragment->data);
 199         }
 200         free(fragment);
 201 }
 202
 203 void rpc_free_all_fragments(struct rpc_context *rpc)
 204 {
 205         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 206
 207         while (rpc->fragments != NULL) {
 208               struct rpc_fragment *fragment = rpc->fragments;
 209
 210               rpc->fragments = fragment->next;
 211               rpc_free_fragment(fragment);
 212         }
 213 }
 214
 215 int rpc_add_fragment(struct rpc_context *rpc, char *data, uint64_t size)
 216 {
 217         struct rpc_fragment *fragment;
 218
 219         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 220
 221         fragment = malloc(sizeof(struct rpc_fragment));
 222         if (fragment == NULL) {
 223                 return -1;
 224         }
 225
 226         fragment->size = size;
 227         fragment->data = malloc(fragment->size);
 228         if(fragment->data == NULL) {
 229                 free(fragment);
 230                 return -1;
 231         }
 232
 233         memcpy(fragment->data, data, fragment->size);
 234         LIBNFS_LIST_ADD_END(&rpc->fragments, fragment);
 235         return 0;
 236 }
 237
 238 void rpc_destroy_context(struct rpc_context *rpc)
 239 {
 240         struct rpc_pdu *pdu;
 241         unsigned int i;
 242
 243         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 244
 245         while((pdu = rpc->outqueue.head) != NULL) {
 246                 pdu->cb(rpc, RPC_STATUS_CANCEL, NULL, pdu->private_data);
 247                 LIBNFS_LIST_REMOVE(&rpc->outqueue.head, pdu);
 248                 rpc_free_pdu(rpc, pdu);
 249         }
 250
 251         for (i = 0; i < HASHES; i++) {
 252                 struct rpc_queue *q = &rpc->waitpdu[i];
 253
 254                 while((pdu = q->head) != NULL) {
 255                         pdu->cb(rpc, RPC_STATUS_CANCEL, NULL, pdu->private_data);
 256                         LIBNFS_LIST_REMOVE(&q->head, pdu);
 257                         rpc_free_pdu(rpc, pdu);
 258                 }
 259         }
 260
 261         rpc_free_all_fragments(rpc);
 262
 263         auth_destroy(rpc->auth);
 264         rpc->auth =NULL;
 265
 266         if (rpc->fd != -1) {
 267                 close(rpc->fd);
 268         }
 269
 270         if (rpc->encodebuf != NULL) {
 271                 free(rpc->encodebuf);
 272                 rpc->encodebuf = NULL;
 273         }
 274
 275         if (rpc->error_string != NULL) {
 276                 free(rpc->error_string);
 277                 rpc->error_string = NULL;
 278         }
 279
 280         if (rpc->udp_dest != NULL) {
 281                 free(rpc->udp_dest);
 282                 rpc->udp_dest = NULL;
 283         }
 284
 285         rpc->magic = 0;
 286         free(rpc);
 287 }
 288
 289