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 char *log_format;
  39
  40
  41 /**
  42  * @file
  43  *
  44  * The sender gets checksums from the generator, calculates deltas,
  45  * and transmits them to the receiver.  The sender process runs on the
  46  * machine holding the source files.
  47  **/
  48
  49 /**
  50  * Receive the checksums for a buffer
  51  **/
  52 static struct sum_struct *receive_sums(int f)
  53 {
  54         struct sum_struct *s;
  55         int32 i;
  56         OFF_T offset = 0;
  57
  58         if (!(s = new(struct sum_struct)))
  59                 out_of_memory("receive_sums");
  60
  61         read_sum_head(f, s);
  62
  63         s->sums = NULL;
  64
  65         if (verbose > 3) {
  66                 rprintf(FINFO, "count=%.0f n=%ld rem=%ld\n",
  67                         (double)s->count, (long)s->blength, (long)s->remainder);
  68         }
  69
  70         if (s->count == 0)
  71                 return(s);
  72
  73         if (!(s->sums = new_array(struct sum_buf, s->count)))
  74                 out_of_memory("receive_sums");
  75
  76         for (i = 0; i < s->count; i++) {
  77                 s->sums[i].sum1 = read_int(f);
  78                 read_buf(f, s->sums[i].sum2, s->s2length);
  79
  80                 s->sums[i].offset = offset;
  81                 s->sums[i].flags = 0;
  82
  83                 if (i == s->count-1 && s->remainder != 0)
  84                         s->sums[i].len = s->remainder;
  85                 else
  86                         s->sums[i].len = s->blength;
  87                 offset += s->sums[i].len;
  88
  89                 if (verbose > 3) {
  90                         rprintf(FINFO,
  91                                 "chunk[%d] len=%d offset=%.0f sum1=%08x\n",
  92                                 i, s->sums[i].len, (double)s->sums[i].offset,
  93                                 s->sums[i].sum1);
  94                 }
  95         }
  96
  97         s->flength = offset;
  98
  99         return s;
 100 }
 101
 102 static struct file_list *the_flist;
 103
 104 void successful_send(int i)
 105 {
 106         char fname[MAXPATHLEN];
 107         struct file_struct *file;
 108         unsigned int offset;
 109
 110         if (!the_flist || i < 0 || i >= the_flist->count)
 111                 return;
 112
 113         file = the_flist->files[i];
 114         /* The generator might tell us about symlinks we didn't send. */
 115         if (!(file->flags & FLAG_SENT) && !S_ISLNK(file->mode))
 116                 return;
 117         if (file->dir.root) {
 118                 offset = stringjoin(fname, sizeof fname,
 119                                     file->dir.root, "/", NULL);
 120         } else
 121                 offset = 0;
 122         f_name_to(file, fname + offset);
 123         if (remove_sent_files && do_unlink(fname) == 0 && verbose > 1) {
 124                 rprintf(FINFO, "sender removed %s\n",
 125                         safe_fname(fname + offset));
 126         }
 127 }
 128
 129 void send_files(struct file_list *flist, int f_out, int f_in)
 130 {
 131         int fd = -1;
 132         struct sum_struct *s;
 133         struct map_struct *mbuf = NULL;
 134         STRUCT_STAT st;
 135         char *fname2, fname[MAXPATHLEN];
 136         int iflags;
 137         struct file_struct *file;
 138         int phase = 0;
 139         struct stats initial_stats;
 140         int save_make_backups = make_backups;
 141         int itemizing = am_daemon ? daemon_log_format_has_i
 142                       : !am_server && log_format_has_i;
 143         int i, j;
 144
 145         if (verbose > 2)
 146                 rprintf(FINFO, "send_files starting\n");
 147
 148         the_flist = flist;
 149
 150         while (1) {
 151                 unsigned int offset;
 152
 153                 i = read_int(f_in);
 154                 if (i == -1) {
 155                         if (phase == 0) {
 156                                 phase++;
 157                                 csum_length = SUM_LENGTH;
 158                                 write_int(f_out, -1);
 159                                 if (verbose > 2)
 160                                         rprintf(FINFO, "send_files phase=%d\n", phase);
 161                                 /* For inplace: redo phase turns off the backup
 162                                  * flag so that we do a regular inplace send. */
 163                                 make_backups = 0;
 164                                 continue;
 165                         }
 166                         break;
 167                 }
 168
 169                 if (i < 0 || i >= flist->count) {
 170                         /* Handle the new keep-alive (no-op) packet. */
 171                         if (i == flist->count && protocol_version >= 29
 172                             && read_shortint(f_in) == ITEM_IS_NEW) {
 173                                 write_int(f_out, i);
 174                                 write_shortint(f_out, ITEM_IS_NEW);
 175                                 continue;
 176                         }
 177                         rprintf(FERROR, "Invalid file index %d (count=%d)\n",
 178                                 i, flist->count);
 179                         exit_cleanup(RERR_PROTOCOL);
 180                 }
 181
 182                 file = flist->files[i];
 183                 if (file->dir.root) {
 184                         /* N.B. We're sure that this fits, so offset is OK. */
 185                         offset = strlcpy(fname, file->dir.root, sizeof fname);
 186                         if (!offset || fname[offset-1] != '/')
 187                                 fname[offset++] = '/';
 188                 } else
 189                         offset = 0;
 190                 fname2 = f_name_to(file, fname + offset);
 191
 192                 if (verbose > 2)
 193                         rprintf(FINFO, "send_files(%d, %s)\n", i, fname);
 194
 195                 if (protocol_version >= 29) {
 196                         iflags = read_shortint(f_in);
 197                         if (!(iflags & ITEM_UPDATING) || !S_ISREG(file->mode)) {
 198                                 int see_item = itemizing && (iflags || verbose > 1);
 199                                 write_int(f_out, i);
 200                                 write_shortint(f_out, iflags);
 201                                 if (am_server) {
 202                                         if (am_daemon && !dry_run && see_item)
 203                                                 log_send(file, &stats, iflags);
 204                                 } else if (see_item || iflags & ITEM_UPDATING
 205                                     || (S_ISDIR(file->mode)
 206                                      && iflags & ITEM_REPORT_TIME))
 207                                         log_send(file, &stats, iflags);
 208                                 continue;
 209                         }
 210                 } else
 211                         iflags = ITEM_UPDATING | ITEM_MISSING_DATA;
 212
 213                 if (inplace && protocol_version >= 29) {
 214                         updating_basis_file = !(iflags & ITEM_USING_ALT_BASIS);
 215                 } else
 216                         updating_basis_file = inplace && !make_backups;
 217
 218                 if (!S_ISREG(file->mode)) {
 219                         rprintf(FERROR, "[%s] got index of non-regular file: %d\n",
 220                                 who_am_i(), i);
 221                         exit_cleanup(RERR_PROTOCOL);
 222                 }
 223
 224                 stats.current_file_index = i;
 225                 stats.num_transferred_files++;
 226                 stats.total_transferred_size += file->length;
 227
 228                 if (dry_run) { /* log the transfer */
 229                         if (!am_server && log_format)
 230                                 log_send(file, &stats, iflags);
 231                         write_int(f_out, i);
 232                         if (protocol_version >= 29)
 233                                 write_shortint(f_out, iflags);
 234                         continue;
 235                 }
 236
 237                 initial_stats = stats;
 238
 239                 if (!(s = receive_sums(f_in))) {
 240                         io_error |= IOERR_GENERAL;
 241                         rprintf(FERROR, "receive_sums failed\n");
 242                         return;
 243                 }
 244
 245                 fd = do_open(fname, O_RDONLY, 0);
 246                 if (fd == -1) {
 247                         if (errno == ENOENT) {
 248                                 enum logcode c = am_daemon
 249                                     && protocol_version < 28 ? FERROR
 250                                                              : FINFO;
 251                                 io_error |= IOERR_VANISHED;
 252                                 rprintf(c, "file has vanished: %s\n",
 253                                         full_fname(fname));
 254                         } else {
 255                                 io_error |= IOERR_GENERAL;
 256                                 rsyserr(FERROR, errno,
 257                                         "send_files failed to open %s",
 258                                         full_fname(fname));
 259                         }
 260                         free_sums(s);
 261                         continue;
 262                 }
 263
 264                 /* map the local file */
 265                 if (do_fstat(fd, &st) != 0) {
 266                         io_error |= IOERR_GENERAL;
 267                         rsyserr(FERROR, errno, "fstat failed");
 268                         free_sums(s);
 269                         close(fd);
 270                         return;
 271                 }
 272
 273                 if (st.st_size) {
 274                         int32 read_size = MAX(s->blength * 3, MAX_MAP_SIZE);
 275                         mbuf = map_file(fd, st.st_size, read_size, s->blength);
 276                 } else
 277                         mbuf = NULL;
 278
 279                 if (verbose > 2) {
 280                         rprintf(FINFO, "send_files mapped %s of size %.0f\n",
 281                                 safe_fname(fname), (double)st.st_size);
 282                 }
 283
 284                 write_int(f_out, i);
 285                 if (protocol_version >= 29)
 286                         write_shortint(f_out, iflags);
 287                 write_sum_head(f_out, s);
 288
 289                 if (verbose > 2) {
 290                         rprintf(FINFO, "calling match_sums %s\n",
 291                                 safe_fname(fname));
 292                 }
 293
 294                 if (log_before_transfer)
 295                         log_send(file, &initial_stats, iflags);
 296                 else if (!am_server && verbose && do_progress)
 297                         rprintf(FINFO, "%s\n", safe_fname(fname2));
 298
 299                 set_compression(fname);
 300
 301                 match_sums(f_out, s, mbuf, st.st_size);
 302                 if (!log_before_transfer)
 303                         log_send(file, &initial_stats, iflags);
 304
 305                 if (mbuf) {
 306                         j = unmap_file(mbuf);
 307                         if (j) {
 308                                 io_error |= IOERR_GENERAL;
 309                                 rsyserr(FERROR, j,
 310                                         "read errors mapping %s",
 311                                         full_fname(fname));
 312                         }
 313                 }
 314                 close(fd);
 315
 316                 free_sums(s);
 317
 318                 if (verbose > 2) {
 319                         rprintf(FINFO, "sender finished %s\n",
 320                                 safe_fname(fname));
 321                 }
 322
 323                 /* Flag that we actually sent this entry. */
 324                 file->flags |= FLAG_SENT;
 325         }
 326         make_backups = save_make_backups;
 327
 328         if (verbose > 2)
 329                 rprintf(FINFO, "send files finished\n");
 330
 331         match_report();
 332
 333         write_int(f_out, -1);
 334 }