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 protocol_version;
  42
  43         sum->count = read_int(f);
  44         sum->blength = read_int(f);
  45         if (protocol_version < 27) {
  46                 sum->s2length = csum_length;
  47         } else {
  48                 sum->s2length = read_int(f);
  49                 if (sum->s2length > MD4_SUM_LENGTH) {
  50                         rprintf(FERROR, "Invalid checksum length %ld\n",
  51                             (long)sum->s2length);
  52                         exit_cleanup(RERR_PROTOCOL);
  53                 }
  54         }
  55         sum->remainder = read_int(f);
  56 }
  57
  58 /**
  59  * Receive the checksums for a buffer
  60  **/
  61 static struct sum_struct *receive_sums(int f)
  62 {
  63         struct sum_struct *s;
  64         int i;
  65         OFF_T offset = 0;
  66
  67         s = new(struct sum_struct);
  68         if (!s) out_of_memory("receive_sums");
  69
  70         read_sum_head(f, s);
  71
  72         s->sums = NULL;
  73
  74         if (verbose > 3)
  75                 rprintf(FINFO, "count=%ld n=%ld rem=%ld\n",
  76                         (long) s->count, (long) s->blength,
  77                         (long) s->remainder);
  78
  79         if (s->count == 0)
  80                 return(s);
  81
  82         s->sums = new_array(struct sum_buf, s->count);
  83         if (!s->sums) out_of_memory("receive_sums");
  84
  85         for (i = 0; i < (int) s->count; i++) {
  86                 s->sums[i].sum1 = read_int(f);
  87                 read_buf(f, s->sums[i].sum2, s->s2length);
  88
  89                 s->sums[i].offset = offset;
  90                 s->sums[i].i = i;
  91
  92                 if (i == (int) s->count-1 && s->remainder != 0) {
  93                         s->sums[i].len = s->remainder;
  94                 } else {
  95                         s->sums[i].len = s->blength;
  96                 }
  97                 offset += s->sums[i].len;
  98
  99                 if (verbose > 3)
 100                         rprintf(FINFO, "chunk[%d] len=%d offset=%.0f sum1=%08x\n",
 101                                 i, s->sums[i].len, (double)s->sums[i].offset, s->sums[i].sum1);
 102         }
 103
 104         s->flength = offset;
 105
 106         return s;
 107 }
 108
 109
 110
 111 void send_files(struct file_list *flist, int f_out, int f_in)
 112 {
 113         int fd = -1;
 114         struct sum_struct *s;
 115         struct map_struct *buf = NULL;
 116         STRUCT_STAT st;
 117         char fname[MAXPATHLEN];
 118         int i;
 119         struct file_struct *file;
 120         int phase = 0;
 121         extern struct stats stats;
 122         struct stats initial_stats;
 123         extern int write_batch;   /* dw */
 124         extern int read_batch;    /* dw */
 125         int checksums_match;   /* dw */
 126         int buff_len;  /* dw */
 127         char buff[CHUNK_SIZE];    /* dw */
 128         int j;   /* dw */
 129         int done;   /* dw */
 130
 131         if (verbose > 2)
 132                 rprintf(FINFO, "send_files starting\n");
 133
 134         while (1) {
 135                 int offset = 0;
 136
 137                 i = read_int(f_in);
 138                 if (i == -1) {
 139                         if (phase == 0) {
 140                                 phase++;
 141                                 csum_length = SUM_LENGTH;
 142                                 write_int(f_out, -1);
 143                                 if (verbose > 2)
 144                                         rprintf(FINFO, "send_files phase=%d\n", phase);
 145                                 continue;
 146                         }
 147                         break;
 148                 }
 149
 150                 if (i < 0 || i >= flist->count) {
 151                         rprintf(FERROR, "Invalid file index %d (count=%d)\n",
 152                                 i, flist->count);
 153                         exit_cleanup(RERR_PROTOCOL);
 154                 }
 155
 156                 file = flist->files[i];
 157
 158                 stats.num_transferred_files++;
 159                 stats.total_transferred_size += file->length;
 160
 161                 fname[0] = 0;
 162                 if (file->basedir) {
 163                         strlcpy(fname, file->basedir, MAXPATHLEN);
 164                         if (strlen(fname) == MAXPATHLEN-1) {
 165                                 io_error |= IOERR_GENERAL;
 166                                 rprintf(FERROR, "send_files failed on long-named directory %s\n",
 167                                         full_fname(fname));
 168                                 return;
 169                         }
 170                         strlcat(fname, "/", MAXPATHLEN);
 171                         offset = strlen(file->basedir)+1;
 172                 }
 173                 strlcat(fname, f_name(file), MAXPATHLEN);
 174
 175                 if (verbose > 2)
 176                         rprintf(FINFO, "send_files(%d, %s)\n", i, fname);
 177
 178                 if (dry_run) {
 179                         if (!am_server && verbose) {    /* log transfer */
 180                                 rprintf(FINFO, "%s\n", fname+offset);
 181                         }
 182                         write_int(f_out, i);
 183                         continue;
 184                 }
 185
 186                 initial_stats = stats;
 187
 188                 s = receive_sums(f_in);
 189                 if (!s) {
 190                         io_error |= IOERR_GENERAL;
 191                         rprintf(FERROR, "receive_sums failed\n");
 192                         return;
 193                 }
 194
 195                 if (write_batch)
 196                         write_batch_csum_info(&i, flist->count, s);
 197
 198                 if (!read_batch) {
 199                         fd = do_open(fname, O_RDONLY, 0);
 200                         if (fd == -1) {
 201                                 if (errno == ENOENT) {
 202                                         io_error |= IOERR_VANISHED;
 203                                         rprintf(FINFO, "file has vanished: %s\n",
 204                                                 full_fname(fname));
 205                                 } else {
 206                                         io_error |= IOERR_GENERAL;
 207                                         rprintf(FERROR, "send_files failed to open %s: %s\n",
 208                                                 full_fname(fname), strerror(errno));
 209                                 }
 210                                 free_sums(s);
 211                                 continue;
 212                         }
 213
 214                         /* map the local file */
 215                         if (do_fstat(fd, &st) != 0) {
 216                                 io_error |= IOERR_GENERAL;
 217                                 rprintf(FERROR, "fstat failed: %s\n", strerror(errno));
 218                                 free_sums(s);
 219                                 close(fd);
 220                                 return;
 221                         }
 222
 223                         if (st.st_size > 0) {
 224                                 buf = map_file(fd, st.st_size);
 225                         } else {
 226                                 buf = NULL;
 227                         }
 228
 229                         if (verbose > 2)
 230                                 rprintf(FINFO, "send_files mapped %s of size %.0f\n",
 231                                         fname, (double)st.st_size);
 232
 233                         write_int(f_out, i);
 234
 235                         if (write_batch)
 236                                 write_batch_delta_file((char *)&i, sizeof(i));
 237
 238                         write_sum_head(f_out, s);
 239                 }
 240
 241                 if (verbose > 2 && !read_batch)
 242                         rprintf(FINFO, "calling match_sums %s\n", fname);
 243
 244                 if (!am_server && verbose) {    /* log transfer */
 245                         rprintf(FINFO, "%s\n", fname+offset);
 246                 }
 247
 248                 set_compression(fname);
 249
 250                 if (read_batch) { /* dw */
 251                         /* read checksums originally computed on sender side */
 252                         read_batch_csum_info(i, s, &checksums_match);
 253                         if (checksums_match) {
 254                                 read_batch_delta_file( (char *) &j, sizeof(int) );
 255                                 if (j != i) {    /* if flist index entries don't match*/
 256                                         rprintf(FINFO, "index mismatch in send_files\n");
 257                                         rprintf(FINFO, "read index = %d flist ndx = %d\n", j, i);
 258                                         close_batch_delta_file();
 259                                         close_batch_csums_file();
 260                                         exit_cleanup(1);
 261                                 } else {
 262                                         write_int(f_out, j);
 263                                         write_sum_head(f_out, s);
 264                                         done = 0;
 265                                         while (!done) {
 266                                                 read_batch_delta_file( (char *) &buff_len, sizeof(int) );
 267                                                 write_int(f_out, buff_len);
 268                                                 if (buff_len == 0) {
 269                                                         done = 1;
 270                                                 } else {
 271                                                         if (buff_len > 0) {
 272                                                                 read_batch_delta_file(buff, buff_len);
 273                                                                 write_buf(f_out, buff, buff_len);
 274                                                         }
 275                                                 }
 276                                         }  /* end while  */
 277                                         read_batch_delta_file( buff, MD4_SUM_LENGTH);
 278                                         write_buf(f_out, buff, MD4_SUM_LENGTH);
 279
 280                                 }  /* j=i */
 281                         } else {  /* not checksum match */
 282                                 rprintf (FINFO, "readbatch & checksums don't match\n");
 283                                 rprintf (FINFO, "filename=%s is being skipped\n", fname);
 284                                 continue;
 285                         }
 286                 } else  {
 287                         match_sums(f_out, s, buf, st.st_size);
 288                         log_send(file, &initial_stats);
 289                 }
 290
 291                 if (!read_batch) { /* dw */
 292                         if (buf) {
 293                                 j = unmap_file(buf);
 294                                 if (j) {
 295                                         io_error |= IOERR_GENERAL;
 296                                         rprintf(FERROR,
 297                                             "read errors mapping %s: (%d) %s\n",
 298                                             full_fname(fname), j, strerror(j));
 299                                 }
 300                         }
 301                         close(fd);
 302                 }
 303
 304                 free_sums(s);
 305
 306                 if (verbose > 2)
 307                         rprintf(FINFO, "sender finished %s\n", fname);
 308         }
 309
 310         if (verbose > 2)
 311                 rprintf(FINFO, "send files finished\n");
 312
 313         match_report();
 314
 315         write_int(f_out, -1);
 316         if (write_batch || read_batch) { /* dw */
 317                 close_batch_csums_file();
 318                 close_batch_delta_file();
 319         }
 320
 321 }
 322
 323
 324
 325
 326