sender.c

   1 /*
   2    Copyright (C) Andrew Tridgell 1996
   3    Copyright (C) Paul Mackerras 1996
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software
  17    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18 */
  19
  20 #include "rsync.h"
  21
  22 extern int verbose;
  23 extern int remote_version;
  24 extern int csum_length;
  25 extern struct stats stats;
  26 extern int io_error;
  27 extern int dry_run;
  28 extern int am_server;
  29
  30
  31 /**
  32  * @file
  33  *
  34  * The sender gets checksums from the generator, calculates deltas,
  35  * and transmits them to the receiver.  The sender process runs on the
  36  * machine holding the source files.
  37  **/
  38
  39
  40 /**
  41  * Receive the checksums for a buffer
  42  **/
  43 static struct sum_struct *receive_sums(int f)
  44 {
  45         struct sum_struct *s;
  46         int i;
  47         OFF_T offset = 0;
  48
  49         s = (struct sum_struct *)malloc(sizeof(*s));
  50         if (!s) out_of_memory("receive_sums");
  51
  52         s->count = read_int(f);
  53         s->n = read_int(f);
  54         s->remainder = read_int(f);
  55         s->sums = NULL;
  56
  57         if (verbose > 3)
  58                 rprintf(FINFO,"count=%ld n=%ld rem=%ld\n",
  59                         (long) s->count, (long) s->n, (long) s->remainder);
  60
  61         if (s->count == 0)
  62                 return(s);
  63
  64         s->sums = (struct sum_buf *)malloc(sizeof(s->sums[0])*s->count);
  65         if (!s->sums) out_of_memory("receive_sums");
  66
  67         for (i=0; i < (int) s->count;i++) {
  68                 s->sums[i].sum1 = read_int(f);
  69                 read_buf(f,s->sums[i].sum2,csum_length);
  70
  71                 s->sums[i].offset = offset;
  72                 s->sums[i].i = i;
  73
  74                 if (i == (int) s->count-1 && s->remainder != 0) {
  75                         s->sums[i].len = s->remainder;
  76                 } else {
  77                         s->sums[i].len = s->n;
  78                 }
  79                 offset += s->sums[i].len;
  80
  81                 if (verbose > 3)
  82                         rprintf(FINFO,"chunk[%d] len=%d offset=%.0f sum1=%08x\n",
  83                                 i,s->sums[i].len,(double)s->sums[i].offset,s->sums[i].sum1);
  84         }
  85
  86         s->flength = offset;
  87
  88         return s;
  89 }
  90
  91
  92
  93 void send_files(struct file_list *flist,int f_out,int f_in)
  94 {
  95         int fd = -1;
  96         struct sum_struct *s;
  97         struct map_struct *buf = NULL;
  98         STRUCT_STAT st;
  99         char fname[MAXPATHLEN];
 100         int i;
 101         struct file_struct *file;
 102         int phase = 0;
 103         extern struct stats stats;
 104         struct stats initial_stats;
 105         extern int write_batch;   /* dw */
 106         extern int read_batch;    /* dw */
 107         int checksums_match;   /* dw */
 108         int buff_len;  /* dw */
 109         char buff[CHUNK_SIZE];    /* dw */
 110         int j;   /* dw */
 111         int done;   /* dw */
 112
 113         if (verbose > 2)
 114                 rprintf(FINFO,"send_files starting\n");
 115
 116         while (1) {
 117                 int offset=0;
 118
 119                 i = read_int(f_in);
 120                 if (i == -1) {
 121                         if (phase==0 && remote_version >= 13) {
 122                                 phase++;
 123                                 csum_length = SUM_LENGTH;
 124                                 write_int(f_out,-1);
 125                                 if (verbose > 2)
 126                                         rprintf(FINFO,"send_files phase=%d\n",phase);
 127                                 continue;
 128                         }
 129                         break;
 130                 }
 131
 132                 if (i < 0 || i >= flist->count) {
 133                         rprintf(FERROR,"Invalid file index %d (count=%d)\n",
 134                                 i, flist->count);
 135                         exit_cleanup(RERR_PROTOCOL);
 136                 }
 137
 138                 file = flist->files[i];
 139
 140                 stats.num_transferred_files++;
 141                 stats.total_transferred_size += file->length;
 142
 143                 fname[0] = 0;
 144                 if (file->basedir) {
 145                         strlcpy(fname,file->basedir,MAXPATHLEN);
 146                         if (strlen(fname) == MAXPATHLEN-1) {
 147                                 io_error = 1;
 148                                 rprintf(FERROR, "send_files failed on long-named directory %s\n",
 149                                         fname);
 150                                 return;
 151                         }
 152                         strlcat(fname,"/",MAXPATHLEN);
 153                         offset = strlen(file->basedir)+1;
 154                 }
 155                 strlcat(fname,f_name(file),MAXPATHLEN);
 156
 157                 if (verbose > 2)
 158                         rprintf(FINFO,"send_files(%d,%s)\n",i,fname);
 159
 160                 if (dry_run) {
 161                         if (!am_server) {
 162                                 log_transfer(file, fname+offset);
 163                         }
 164                         write_int(f_out,i);
 165                         continue;
 166                 }
 167
 168                 initial_stats = stats;
 169
 170                 s = receive_sums(f_in);
 171                 if (!s) {
 172                         io_error = 1;
 173                         rprintf(FERROR,"receive_sums failed\n");
 174                         return;
 175                 }
 176
 177                 if (write_batch)
 178                     write_batch_csum_info(&i,flist->count,s);
 179
 180                 if (!read_batch) {
 181                         fd = do_open(fname, O_RDONLY, 0);
 182                         if (fd == -1) {
 183                                 io_error = 1;
 184                                 rprintf(FERROR,"send_files failed to open %s: %s\n",
 185                                         fname,strerror(errno));
 186                                 free_sums(s);
 187                                 continue;
 188                         }
 189
 190                         /* map the local file */
 191                         if (do_fstat(fd,&st) != 0) {
 192                                 io_error = 1;
 193                                 rprintf(FERROR,"fstat failed : %s\n",strerror(errno));
 194                                 free_sums(s);
 195                                 close(fd);
 196                                 return;
 197                         }
 198
 199                         if (st.st_size > 0) {
 200                                 buf = map_file(fd,st.st_size);
 201                         } else {
 202                                 buf = NULL;
 203                         }
 204
 205                         if (verbose > 2)
 206                                 rprintf(FINFO,"send_files mapped %s of size %.0f\n",
 207                                         fname,(double)st.st_size);
 208
 209                         write_int(f_out,i);
 210
 211                         if (write_batch)
 212                                 write_batch_delta_file((char *)&i,sizeof(i));
 213
 214                         write_int(f_out,s->count);
 215                         write_int(f_out,s->n);
 216                         write_int(f_out,s->remainder);
 217                 }
 218
 219                 if (verbose > 2)
 220                         if (!read_batch)
 221                             rprintf(FINFO,"calling match_sums %s\n",fname);
 222
 223                 if (!am_server) {
 224                         log_transfer(file, fname+offset);
 225                 }
 226
 227                 set_compression(fname);
 228
 229                 if (read_batch) { /* dw */
 230                    /* read checksums originally computed on sender side */
 231                    read_batch_csum_info(i, s, &checksums_match);
 232                    if (checksums_match) {
 233                        read_batch_delta_file( (char *) &j, sizeof(int) );
 234                        if (j != i) {    /* if flist index entries don't match*/
 235                           rprintf(FINFO,"index mismatch in send_files\n");
 236                           rprintf(FINFO,"read index = %d flist ndx = %d\n",j,i);
 237                           close_batch_delta_file();
 238                           close_batch_csums_file();
 239                           exit_cleanup(1);
 240                        }
 241                        else {
 242                          write_int(f_out,j);
 243                          write_int(f_out,s->count);
 244                          write_int(f_out,s->n);
 245                          write_int(f_out,s->remainder);
 246                          done=0;
 247                          while (!done) {
 248                             read_batch_delta_file( (char *) &buff_len, sizeof(int) );
 249                             write_int(f_out,buff_len);
 250                             if (buff_len == 0) {
 251                                done = 1;
 252                             }
 253                             else {
 254                                if (buff_len > 0) {
 255                                   read_batch_delta_file(buff, buff_len);
 256                                   write_buf(f_out,buff,buff_len);
 257                                }
 258                             }
 259                          }  /* end while  */
 260                          read_batch_delta_file( buff, MD4_SUM_LENGTH);
 261                          write_buf(f_out, buff, MD4_SUM_LENGTH);
 262
 263                        }  /* j=i */
 264                    } else {  /* not checksum match */
 265                       rprintf (FINFO,"readbatch & checksums don't match\n");
 266                       rprintf (FINFO,"filename=%s is being skipped\n",
 267                                fname);
 268                       continue;
 269                    }
 270                 } else  {
 271                     match_sums(f_out,s,buf,st.st_size);
 272                     log_send(file, &initial_stats);
 273                 }
 274
 275                 if (!read_batch) { /* dw */
 276                     if (buf) unmap_file(buf);
 277                     close(fd);
 278                 }
 279
 280                 free_sums(s);
 281
 282                 if (verbose > 2)
 283                         rprintf(FINFO,"sender finished %s\n",fname);
 284         }
 285
 286         if (verbose > 2)
 287                 rprintf(FINFO,"send files finished\n");
 288
 289         match_report();
 290
 291         write_int(f_out,-1);
 292         if (write_batch || read_batch) { /* dw */
 293             close_batch_csums_file();
 294             close_batch_delta_file();
 295         }
 296
 297 }
 298
 299
 300
 301
 302