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 dry_run;
  24 extern int am_server;
  25 extern int am_daemon;
  26 extern int log_before_transfer;
  27 extern int log_format_has_i;
  28 extern int daemon_log_format_has_i;
  29 extern int csum_length;
  30 extern int io_error;
  31 extern int protocol_version;
  32 extern int remove_sent_files;
  33 extern int updating_basis_file;
  34 extern int make_backups;
  35 extern int do_progress;
  36 extern int inplace;
  37 extern struct stats stats;
  38 extern struct file_list *the_file_list;
  39 extern char *log_format;
  40
  41
  42 /**
  43  * @file
  44  *
  45  * The sender gets checksums from the generator, calculates deltas,
  46  * and transmits them to the receiver.  The sender process runs on the
  47  * machine holding the source files.
  48  **/
  49
  50 /**
  51  * Receive the checksums for a buffer
  52  **/
  53 static struct sum_struct *receive_sums(int f)
  54 {
  55         struct sum_struct *s;
  56         int32 i;
  57         OFF_T offset = 0;
  58
  59         if (!(s = new(struct sum_struct)))
  60                 out_of_memory("receive_sums");
  61
  62         read_sum_head(f, s);
  63
  64         s->sums = NULL;
  65
  66         if (verbose > 3) {
  67                 rprintf(FINFO, "count=%.0f n=%ld rem=%ld\n",
  68                         (double)s->count, (long)s->blength, (long)s->remainder);
  69         }
  70
  71         if (s->count == 0)
  72                 return(s);
  73
  74         if (!(s->sums = new_array(struct sum_buf, s->count)))
  75                 out_of_memory("receive_sums");
  76
  77         for (i = 0; i < s->count; i++) {
  78                 s->sums[i].sum1 = read_int(f);
  79                 read_buf(f, s->sums[i].sum2, s->s2length);
  80
  81                 s->sums[i].offset = offset;
  82                 s->sums[i].flags = 0;
  83
  84                 if (i == s->count-1 && s->remainder != 0)
  85                         s->sums[i].len = s->remainder;
  86                 else
  87                         s->sums[i].len = s->blength;
  88                 offset += s->sums[i].len;
  89
  90                 if (verbose > 3) {
  91                         rprintf(FINFO,
  92                                 "chunk[%d] len=%d offset=%.0f sum1=%08x\n",
  93                                 i, s->sums[i].len, (double)s->sums[i].offset,
  94                                 s->sums[i].sum1);
  95                 }
  96         }
  97
  98         s->flength = offset;
  99
 100         return s;
 101 }
 102
 103 void successful_send(int ndx)
 104 {
 105         char fname[MAXPATHLEN];
 106         struct file_struct *file;
 107         unsigned int offset;
 108
 109         if (ndx < 0 || ndx >= the_file_list->count)
 110                 return;
 111
 112         file = the_file_list->files[ndx];
 113         /* The generator might tell us about symlinks we didn't send. */
 114         if (!(file->flags & FLAG_SENT) && !S_ISLNK(file->mode))
 115                 return;
 116         if (file->dir.root) {
 117                 offset = stringjoin(fname, sizeof fname,
 118                                     file->dir.root, "/", NULL);
 119         } else
 120                 offset = 0;
 121         f_name_to(file, fname + offset);
 122         if (remove_sent_files && do_unlink(fname) == 0 && verbose > 1) {
 123                 rprintf(FINFO, "sender removed %s\n",
 124                         safe_fname(fname + offset));
 125         }
 126 }
 127
 128 void send_files(struct file_list *flist, int f_out, int f_in)
 129 {
 130         int fd = -1;
 131         struct sum_struct *s;
 132         struct map_struct *mbuf = NULL;
 133         STRUCT_STAT st;
 134         char *fname2, fname[MAXPATHLEN];
 135         int iflags;
 136         struct file_struct *file;
 137         int phase = 0;
 138         struct stats initial_stats;
 139         int save_make_backups = make_backups;
 140         int itemizing = am_daemon ? daemon_log_format_has_i
 141                       : !am_server && log_format_has_i;
 142         int i, j;
 143
 144         if (verbose > 2)
 145                 rprintf(FINFO, "send_files starting\n");
 146
 147         while (1) {
 148                 unsigned int offset;
 149
 150                 i = read_int(f_in);
 151                 if (i == -1) {
 152                         if (phase == 0) {
 153                                 phase++;
 154                                 csum_length = SUM_LENGTH;
 155                                 write_int(f_out, -1);
 156                                 if (verbose > 2)
 157                                         rprintf(FINFO, "send_files phase=%d\n", phase);
 158                                 /* For inplace: redo phase turns off the backup
 159                                  * flag so that we do a regular inplace send. */
 160                                 make_backups = 0;
 161                                 continue;
 162                         }
 163                         break;
 164                 }
 165
 166                 if (i < 0 || i >= flist->count) {
 167                         /* Handle the new keep-alive (no-op) packet. */
 168                         if (i == flist->count && protocol_version >= 29
 169                             && read_shortint(f_in) == ITEM_IS_NEW) {
 170                                 write_int(f_out, i);
 171                                 write_shortint(f_out, ITEM_IS_NEW);
 172                                 continue;
 173                         }
 174                         rprintf(FERROR, "Invalid file index %d (count=%d)\n",
 175                                 i, flist->count);
 176                         exit_cleanup(RERR_PROTOCOL);
 177                 }
 178
 179                 file = flist->files[i];
 180                 if (file->dir.root) {
 181                         /* N.B. We're sure that this fits, so offset is OK. */
 182                         offset = strlcpy(fname, file->dir.root, sizeof fname);
 183                         if (!offset || fname[offset-1] != '/')
 184                                 fname[offset++] = '/';
 185                 } else
 186                         offset = 0;
 187                 fname2 = f_name_to(file, fname + offset);
 188
 189                 if (verbose > 2)
 190                         rprintf(FINFO, "send_files(%d, %s)\n", i, fname);
 191
 192                 if (protocol_version >= 29) {
 193                         iflags = read_shortint(f_in);
 194                         if (!(iflags & ITEM_UPDATING) || !S_ISREG(file->mode)) {
 195                                 int see_item = itemizing && (iflags || verbose > 1);
 196                                 write_int(f_out, i);
 197                                 write_shortint(f_out, iflags);
 198                                 if (am_server) {
 199                                         if (am_daemon && !dry_run && see_item)
 200                                                 log_item(file, &stats, iflags, NULL);
 201                                 } else if (see_item || iflags & ITEM_UPDATING
 202                                     || (S_ISDIR(file->mode)
 203                                      && iflags & ITEM_REPORT_TIME))
 204                                         log_item(file, &stats, iflags, NULL);
 205                                 continue;
 206                         }
 207                 } else
 208                         iflags = ITEM_UPDATING | ITEM_MISSING_DATA;
 209
 210                 if (inplace && protocol_version >= 29) {
 211                         updating_basis_file = !(iflags & ITEM_USING_ALT_BASIS);
 212                 } else
 213                         updating_basis_file = inplace && !make_backups;
 214
 215                 if (!S_ISREG(file->mode)) {
 216                         rprintf(FERROR, "[%s] got index of non-regular file: %d\n",
 217                                 who_am_i(), i);
 218                         exit_cleanup(RERR_PROTOCOL);
 219                 }
 220
 221                 stats.current_file_index = i;
 222                 stats.num_transferred_files++;
 223                 stats.total_transferred_size += file->length;
 224
 225                 if (dry_run) { /* log the transfer */
 226                         if (!am_server && log_format)
 227                                 log_item(file, &stats, iflags, NULL);
 228                         write_int(f_out, i);
 229                         if (protocol_version >= 29)
 230                                 write_shortint(f_out, iflags);
 231                         continue;
 232                 }
 233
 234                 initial_stats = stats;
 235
 236                 if (!(s = receive_sums(f_in))) {
 237                         io_error |= IOERR_GENERAL;
 238                         rprintf(FERROR, "receive_sums failed\n");
 239                         return;
 240                 }
 241
 242                 fd = do_open(fname, O_RDONLY, 0);
 243                 if (fd == -1) {
 244                         if (errno == ENOENT) {
 245                                 enum logcode c = am_daemon
 246                                     && protocol_version < 28 ? FERROR
 247                                                              : FINFO;
 248                                 io_error |= IOERR_VANISHED;
 249                                 rprintf(c, "file has vanished: %s\n",
 250                                         full_fname(fname));
 251                         } else {
 252                                 io_error |= IOERR_GENERAL;
 253                                 rsyserr(FERROR, errno,
 254                                         "send_files failed to open %s",
 255                                         full_fname(fname));
 256                         }
 257                         free_sums(s);
 258                         continue;
 259                 }
 260
 261                 /* map the local file */
 262                 if (do_fstat(fd, &st) != 0) {
 263                         io_error |= IOERR_GENERAL;
 264                         rsyserr(FERROR, errno, "fstat failed");
 265                         free_sums(s);
 266                         close(fd);
 267                         return;
 268                 }
 269
 270                 if (st.st_size) {
 271                         int32 read_size = MAX(s->blength * 3, MAX_MAP_SIZE);
 272                         mbuf = map_file(fd, st.st_size, read_size, s->blength);
 273                 } else
 274                         mbuf = NULL;
 275
 276                 if (verbose > 2) {
 277                         rprintf(FINFO, "send_files mapped %s of size %.0f\n",
 278                                 safe_fname(fname), (double)st.st_size);
 279                 }
 280
 281                 write_int(f_out, i);
 282                 if (protocol_version >= 29)
 283                         write_shortint(f_out, iflags);
 284                 write_sum_head(f_out, s);
 285
 286                 if (verbose > 2) {
 287                         rprintf(FINFO, "calling match_sums %s\n",
 288                                 safe_fname(fname));
 289                 }
 290
 291                 if (log_before_transfer)
 292                         log_item(file, &initial_stats, iflags, NULL);
 293                 else if (!am_server && verbose && do_progress)
 294                         rprintf(FINFO, "%s\n", safe_fname(fname2));
 295
 296                 set_compression(fname);
 297
 298                 match_sums(f_out, s, mbuf, st.st_size);
 299                 if (!log_before_transfer)
 300                         log_item(file, &initial_stats, iflags, NULL);
 301
 302                 if (mbuf) {
 303                         j = unmap_file(mbuf);
 304                         if (j) {
 305                                 io_error |= IOERR_GENERAL;
 306                                 rsyserr(FERROR, j,
 307                                         "read errors mapping %s",
 308                                         full_fname(fname));
 309                         }
 310                 }
 311                 close(fd);
 312
 313                 free_sums(s);
 314
 315                 if (verbose > 2) {
 316                         rprintf(FINFO, "sender finished %s\n",
 317                                 safe_fname(fname));
 318                 }
 319
 320                 /* Flag that we actually sent this entry. */
 321                 file->flags |= FLAG_SENT;
 322         }
 323         make_backups = save_make_backups;
 324
 325         if (verbose > 2)
 326                 rprintf(FINFO, "send files finished\n");
 327
 328         match_report();
 329
 330         write_int(f_out, -1);
 331 }