lib/init.c

   1 /*
   2    Copyright (C) 2010 by Ronnie Sahlberg <ronniesahlberg@gmail.com>
   3
   4
   5
   6    This program is distributed in the hope that it will be useful,
   7    but WITHOUT ANY WARRANTY; without even the implied warranty of
   8    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9    GNU Lesser General Public License for more details.
  10
  11    You should have received a copy of the GNU Lesser General Public License
  12    along with this program; if not, see <http://www.gnu.org/licenses/>.
  13 */
  14 #ifdef HAVE_CONFIG_H
  15 #include "config.h"
  16 #endif
  17
  18 #ifdef AROS
  19 #include "aros_compat.h"
  20 #endif
  21
  22 #ifdef WIN32
  23 #include "win32_compat.h"
  24 #endif
  25
  26 #define _GNU_SOURCE
  27
  28 #ifdef HAVE_UNISTD_H
  29 #include <unistd.h>
  30 #endif
  31
  32 #ifdef HAVE_STRINGS_H
  33 #include <strings.h>
  34 #endif
  35
  36 #include <stdio.h>
  37 #include <stdarg.h>
  38 #include <string.h>
  39 #include <stdlib.h>
  40 #include <assert.h>
  41 #include <time.h>
  42 #include "slist.h"
  43 #include "libnfs-zdr.h"
  44 #include "libnfs.h"
  45 #include "libnfs-raw.h"
  46 #include "libnfs-private.h"
  47
  48 struct rpc_context *rpc_init_context(void)
  49 {
  50         struct rpc_context *rpc;
  51         static uint32_t salt = 0;
  52         unsigned int i;
  53
  54         rpc = malloc(sizeof(struct rpc_context));
  55         if (rpc == NULL) {
  56                 return NULL;
  57         }
  58         memset(rpc, 0, sizeof(struct rpc_context));
  59
  60         rpc->magic = RPC_CONTEXT_MAGIC;
  61
  62         /* Allow 1M of data (for writes) and some */
  63         rpc->encodebuflen = 1024 * 1024 + 4096;
  64         rpc->encodebuf = malloc(rpc->encodebuflen);
  65         if (rpc->encodebuf == NULL) {
  66                 free(rpc);
  67                 return NULL;
  68         }
  69
  70         rpc->auth = authunix_create_default();
  71         if (rpc->auth == NULL) {
  72                 free(rpc->encodebuf);
  73                 free(rpc);
  74                 return NULL;
  75         }
  76         rpc->xid = salt + time(NULL) + getpid() << 16;
  77         salt += 0x01000000;
  78         rpc->fd = -1;
  79         rpc->tcp_syncnt = RPC_PARAM_UNDEFINED;
  80 #if defined(WIN32) || defined(ANDROID)
  81         rpc->uid = 65534;
  82         rpc->gid = 65534;
  83 #else
  84         rpc->uid = getuid();
  85         rpc->gid = getgid();
  86 #endif
  87         rpc_reset_queue(&rpc->outqueue);
  88         for (i = 0; i < HASHES; i++)
  89                 rpc_reset_queue(&rpc->waitpdu[i]);
  90
  91         return rpc;
  92 }
  93
  94 void rpc_set_readahead(struct rpc_context *rpc, uint32_t v)
  95 {
  96         assert(rpc->magic == RPC_CONTEXT_MAGIC);
  97
  98         rpc->readahead = v;
  99 }
 100
 101 struct rpc_context *rpc_init_udp_context(void)
 102 {
 103         struct rpc_context *rpc;
 104
 105         rpc = rpc_init_context();
 106         if (rpc != NULL) {
 107                 rpc->is_udp = 1;
 108         }
 109
 110         return rpc;
 111 }
 112
 113 void rpc_set_auth(struct rpc_context *rpc, struct AUTH *auth)
 114 {
 115         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 116
 117         if (rpc->auth != NULL) {
 118                 auth_destroy(rpc->auth);
 119         }
 120         rpc->auth = auth;
 121 }
 122
 123 static void rpc_set_uid_gid(struct rpc_context *rpc, int uid, int gid) {
 124         if (uid != rpc->uid || gid != rpc->gid) {
 125                 struct AUTH *auth = libnfs_authunix_create("libnfs", uid, gid, 0, NULL);
 126                 if (auth != NULL) {
 127                         rpc_set_auth(rpc, auth);
 128                         rpc->uid = uid;
 129                         rpc->gid = gid;
 130                 }
 131         }
 132 }
 133
 134 void rpc_set_uid(struct rpc_context *rpc, int uid) {
 135         rpc_set_uid_gid(rpc, uid, rpc->gid);
 136 }
 137
 138 void rpc_set_gid(struct rpc_context *rpc, int gid) {
 139         rpc_set_uid_gid(rpc, rpc->uid, gid);
 140 }
 141
 142 void rpc_set_error(struct rpc_context *rpc, char *error_string, ...)
 143 {
 144         va_list ap;
 145         char *old_error_string = rpc->error_string;
 146
 147         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 148
 149         va_start(ap, error_string);
 150         rpc->error_string = malloc(1024);
 151         vsnprintf(rpc->error_string, 1024, error_string, ap);
 152         va_end(ap);
 153
 154         if (old_error_string != NULL) {
 155                 free(old_error_string);
 156         }
 157 }
 158
 159 char *rpc_get_error(struct rpc_context *rpc)
 160 {
 161         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 162
 163         return rpc->error_string;
 164 }
 165
 166 void rpc_error_all_pdus(struct rpc_context *rpc, char *error)
 167 {
 168         struct rpc_pdu *pdu, *next;
 169         unsigned int i;
 170
 171         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 172
 173         while ((pdu = rpc->outqueue.head) != NULL) {
 174                 pdu->cb(rpc, RPC_STATUS_ERROR, error, pdu->private_data);
 175                 rpc->outqueue.head = pdu->next;
 176                 rpc_free_pdu(rpc, pdu);
 177         }
 178         rpc->outqueue.tail = NULL;
 179
 180         for (i = 0; i < HASHES; i++) {
 181                 struct rpc_queue *q = &rpc->waitpdu[i];
 182
 183                 while((pdu = q->head) != NULL) {
 184                         pdu->cb(rpc, RPC_STATUS_ERROR, error, pdu->private_data);
 185                         q->head = pdu->next;
 186                         rpc_free_pdu(rpc, pdu);
 187                 }
 188                 q->tail = NULL;
 189         }
 190 }
 191
 192 static void rpc_free_fragment(struct rpc_fragment *fragment)
 193 {
 194         if (fragment->data != NULL) {
 195                 free(fragment->data);
 196         }
 197         free(fragment);
 198 }
 199
 200 void rpc_free_all_fragments(struct rpc_context *rpc)
 201 {
 202         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 203
 204         while (rpc->fragments != NULL) {
 205               struct rpc_fragment *fragment = rpc->fragments;
 206
 207               rpc->fragments = fragment->next;
 208               rpc_free_fragment(fragment);
 209         }
 210 }
 211
 212 int rpc_add_fragment(struct rpc_context *rpc, char *data, uint64_t size)
 213 {
 214         struct rpc_fragment *fragment;
 215
 216         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 217
 218         fragment = malloc(sizeof(struct rpc_fragment));
 219         if (fragment == NULL) {
 220                 return -1;
 221         }
 222
 223         fragment->size = size;
 224         fragment->data = malloc(fragment->size);
 225         if(fragment->data == NULL) {
 226                 free(fragment);
 227                 return -1;
 228         }
 229
 230         memcpy(fragment->data, data, fragment->size);
 231         LIBNFS_LIST_ADD_END(&rpc->fragments, fragment);
 232         return 0;
 233 }
 234
 235 void rpc_destroy_context(struct rpc_context *rpc)
 236 {
 237         struct rpc_pdu *pdu;
 238         unsigned int i;
 239
 240         assert(rpc->magic == RPC_CONTEXT_MAGIC);
 241
 242         while((pdu = rpc->outqueue.head) != NULL) {
 243                 pdu->cb(rpc, RPC_STATUS_CANCEL, NULL, pdu->private_data);
 244                 rpc->outqueue.head = pdu->next;
 245                 rpc_free_pdu(rpc, pdu);
 246         }
 247
 248         for (i = 0; i < HASHES; i++) {
 249                 struct rpc_queue *q = &rpc->waitpdu[i];
 250
 251                 while((pdu = q->head) != NULL) {
 252                         pdu->cb(rpc, RPC_STATUS_CANCEL, NULL, pdu->private_data);
 253                         rpc->outqueue.head = pdu->next;
 254                         rpc_free_pdu(rpc, pdu);
 255                 }
 256         }
 257
 258         rpc_free_all_fragments(rpc);
 259
 260         auth_destroy(rpc->auth);
 261         rpc->auth =NULL;
 262
 263         if (rpc->fd != -1) {
 264                 close(rpc->fd);
 265         }
 266
 267         if (rpc->encodebuf != NULL) {
 268                 free(rpc->encodebuf);
 269                 rpc->encodebuf = NULL;
 270         }
 271
 272         if (rpc->error_string != NULL) {
 273                 free(rpc->error_string);
 274                 rpc->error_string = NULL;
 275         }
 276
 277         if (rpc->udp_dest != NULL) {
 278                 free(rpc->udp_dest);
 279                 rpc->udp_dest = NULL;
 280         }
 281
 282         rpc->magic = 0;
 283         free(rpc);
 284 }
 285
 286