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 csum_length;
  24 extern struct stats stats;
  25 extern int io_error;
  26 extern int dry_run;
  27 extern int am_server;
  28
  29
  30 /**
  31  * @file
  32  *
  33  * The sender gets checksums from the generator, calculates deltas,
  34  * and transmits them to the receiver.  The sender process runs on the
  35  * machine holding the source files.
  36  **/
  37
  38
  39 void read_sum_head(int f, struct sum_struct *sum)
  40 {
  41         extern int remote_version;
  42
  43         sum->count = read_int(f);
  44         sum->blength = read_int(f);
  45         if (remote_version < 27)
  46         {
  47                 sum->s2length = csum_length;
  48         } else {
  49                 sum->s2length = read_int(f);
  50         }
  51         sum->remainder = read_int(f);
  52 }
  53
  54 /**
  55  * Receive the checksums for a buffer
  56  **/
  57 static struct sum_struct *receive_sums(int f)
  58 {
  59         struct sum_struct *s;
  60         int i;
  61         OFF_T offset = 0;
  62
  63         s = (struct sum_struct *)malloc(sizeof(*s));
  64         if (!s) out_of_memory("receive_sums");
  65
  66         read_sum_head(f, s);
  67
  68         s->sums = NULL;
  69
  70         if (verbose > 3)
  71                 rprintf(FINFO, "count=%ld n=%ld rem=%ld\n",
  72                         (long) s->count, (long) s->blength,
  73                         (long) s->remainder);
  74
  75         if (s->count == 0)
  76                 return(s);
  77
  78         s->sums = (struct sum_buf *)malloc(sizeof(s->sums[0])*s->count);
  79         if (!s->sums) out_of_memory("receive_sums");
  80
  81         for (i = 0; i < (int) s->count; i++) {
  82                 s->sums[i].sum1 = read_int(f);
  83                 read_buf(f, s->sums[i].sum2, s->s2length);
  84
  85                 s->sums[i].offset = offset;
  86                 s->sums[i].i = i;
  87
  88                 if (i == (int) s->count-1 && s->remainder != 0) {
  89                         s->sums[i].len = s->remainder;
  90                 } else {
  91                         s->sums[i].len = s->blength;
  92                 }
  93                 offset += s->sums[i].len;
  94
  95                 if (verbose > 3)
  96                         rprintf(FINFO, "chunk[%d] len=%d offset=%.0f sum1=%08x\n",
  97                                 i, s->sums[i].len, (double)s->sums[i].offset, s->sums[i].sum1);
  98         }
  99
 100         s->flength = offset;
 101
 102         return s;
 103 }
 104
 105
 106
 107 void send_files(struct file_list *flist, int f_out, int f_in)
 108 {
 109         int fd = -1;
 110         struct sum_struct *s;
 111         struct map_struct *buf = NULL;
 112         STRUCT_STAT st;
 113         char fname[MAXPATHLEN];
 114         int i;
 115         struct file_struct *file;
 116         int phase = 0;
 117         extern struct stats stats;
 118         struct stats initial_stats;
 119         extern int write_batch;   /* dw */
 120         extern int read_batch;    /* dw */
 121         int checksums_match;   /* dw */
 122         int buff_len;  /* dw */
 123         char buff[CHUNK_SIZE];    /* dw */
 124         int j;   /* dw */
 125         int done;   /* dw */
 126
 127         if (verbose > 2)
 128                 rprintf(FINFO, "send_files starting\n");
 129
 130         while (1) {
 131                 int offset = 0;
 132
 133                 i = read_int(f_in);
 134                 if (i == -1) {
 135                         if (phase == 0) {
 136                                 phase++;
 137                                 csum_length = SUM_LENGTH;
 138                                 write_int(f_out, -1);
 139                                 if (verbose > 2)
 140                                         rprintf(FINFO, "send_files phase=%d\n", phase);
 141                                 continue;
 142                         }
 143                         break;
 144                 }
 145
 146                 if (i < 0 || i >= flist->count) {
 147                         rprintf(FERROR, "Invalid file index %d (count=%d)\n",
 148                                 i, flist->count);
 149                         exit_cleanup(RERR_PROTOCOL);
 150                 }
 151
 152                 file = flist->files[i];
 153
 154                 stats.num_transferred_files++;
 155                 stats.total_transferred_size += file->length;
 156
 157                 fname[0] = 0;
 158                 if (file->basedir) {
 159                         strlcpy(fname, file->basedir, MAXPATHLEN);
 160                         if (strlen(fname) == MAXPATHLEN-1) {
 161                                 io_error = 1;
 162                                 rprintf(FERROR, "send_files failed on long-named directory %s\n",
 163                                         fname);
 164                                 return;
 165                         }
 166                         strlcat(fname, "/", MAXPATHLEN);
 167                         offset = strlen(file->basedir)+1;
 168                 }
 169                 strlcat(fname, f_name(file), MAXPATHLEN);
 170
 171                 if (verbose > 2)
 172                         rprintf(FINFO, "send_files(%d, %s)\n", i, fname);
 173
 174                 if (dry_run) {
 175                         if (!am_server && verbose) {    /* log transfer */
 176                                 rprintf(FINFO, "%s\n", fname+offset);
 177                         }
 178                         write_int(f_out, i);
 179                         continue;
 180                 }
 181
 182                 initial_stats = stats;
 183
 184                 s = receive_sums(f_in);
 185                 if (!s) {
 186                         io_error = 1;
 187                         rprintf(FERROR, "receive_sums failed\n");
 188                         return;
 189                 }
 190
 191                 if (write_batch)
 192                         write_batch_csum_info(&i, flist->count, s);
 193
 194                 if (!read_batch) {
 195                         fd = do_open(fname, O_RDONLY, 0);
 196                         if (fd == -1) {
 197                                 io_error = 1;
 198                                 rprintf(FERROR, "send_files failed to open %s: %s\n",
 199                                         fname, strerror(errno));
 200                                 free_sums(s);
 201                                 continue;
 202                         }
 203
 204                         /* map the local file */
 205                         if (do_fstat(fd, &st) != 0) {
 206                                 io_error = 1;
 207                                 rprintf(FERROR, "fstat failed : %s\n", strerror(errno));
 208                                 free_sums(s);
 209                                 close(fd);
 210                                 return;
 211                         }
 212
 213                         if (st.st_size > 0) {
 214                                 buf = map_file(fd, st.st_size);
 215                         } else {
 216                                 buf = NULL;
 217                         }
 218
 219                         if (verbose > 2)
 220                                 rprintf(FINFO, "send_files mapped %s of size %.0f\n",
 221                                         fname, (double)st.st_size);
 222
 223                         write_int(f_out, i);
 224
 225                         if (write_batch)
 226                                 write_batch_delta_file((char *)&i, sizeof(i));
 227
 228                         write_sum_head(f_out, s);
 229                 }
 230
 231                 if (verbose > 2 && !read_batch)
 232                         rprintf(FINFO, "calling match_sums %s\n", fname);
 233
 234                 if (!am_server && verbose) {    /* log transfer */
 235                         rprintf(FINFO, "%s\n", fname+offset);
 236                 }
 237
 238                 set_compression(fname);
 239
 240                 if (read_batch) { /* dw */
 241                         /* read checksums originally computed on sender side */
 242                         read_batch_csum_info(i, s, &checksums_match);
 243                         if (checksums_match) {
 244                                 read_batch_delta_file( (char *) &j, sizeof(int) );
 245                                 if (j != i) {    /* if flist index entries don't match*/
 246                                         rprintf(FINFO, "index mismatch in send_files\n");
 247                                         rprintf(FINFO, "read index = %d flist ndx = %d\n", j, i);
 248                                         close_batch_delta_file();
 249                                         close_batch_csums_file();
 250                                         exit_cleanup(1);
 251                                 } else {
 252                                         write_int(f_out, j);
 253                                         write_sum_head(f_out, s);
 254                                         done = 0;
 255                                         while (!done) {
 256                                                 read_batch_delta_file( (char *) &buff_len, sizeof(int) );
 257                                                 write_int(f_out, buff_len);
 258                                                 if (buff_len == 0) {
 259                                                         done = 1;
 260                                                 } else {
 261                                                         if (buff_len > 0) {
 262                                                                 read_batch_delta_file(buff, buff_len);
 263                                                                 write_buf(f_out, buff, buff_len);
 264                                                         }
 265                                                 }
 266                                         }  /* end while  */
 267                                         read_batch_delta_file( buff, MD4_SUM_LENGTH);
 268                                         write_buf(f_out, buff, MD4_SUM_LENGTH);
 269
 270                                 }  /* j=i */
 271                         } else {  /* not checksum match */
 272                                 rprintf (FINFO, "readbatch & checksums don't match\n");
 273                                 rprintf (FINFO, "filename=%s is being skipped\n", fname);
 274                                 continue;
 275                         }
 276                 } else  {
 277                         match_sums(f_out, s, buf, st.st_size);
 278                         log_send(file, &initial_stats);
 279                 }
 280
 281                 if (!read_batch) { /* dw */
 282                         if (buf) unmap_file(buf);
 283                         close(fd);
 284                 }
 285
 286                 free_sums(s);
 287
 288                 if (verbose > 2)
 289                         rprintf(FINFO, "sender finished %s\n", fname);
 290         }
 291
 292         if (verbose > 2)
 293                 rprintf(FINFO, "send files finished\n");
 294
 295         match_report();
 296
 297         write_int(f_out, -1);
 298         if (write_batch || read_batch) { /* dw */
 299                 close_batch_csums_file();
 300                 close_batch_delta_file();
 301         }
 302
 303 }
 304
 305
 306
 307
 308