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 log_before_transfer;
  25 extern int log_format_has_i;
  26 extern int daemon_log_format_has_i;
  27 extern int am_server;
  28 extern int am_daemon;
  29 extern int csum_length;
  30 extern struct stats stats;
  31 extern int io_error;
  32 extern int protocol_version;
  33 extern int updating_basis_file;
  34 extern int make_backups;
  35 extern int do_progress;
  36 extern int inplace;
  37 extern char *log_format;
  38 extern struct stats stats;
  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
 103
 104 void send_files(struct file_list *flist, int f_out, int f_in)
 105 {
 106         int fd = -1;
 107         struct sum_struct *s;
 108         struct map_struct *mbuf = NULL;
 109         STRUCT_STAT st;
 110         char *fname2, fname[MAXPATHLEN];
 111         int iflags;
 112         struct file_struct *file;
 113         int phase = 0;
 114         struct stats initial_stats;
 115         int save_make_backups = make_backups;
 116         int itemizing = am_daemon ? daemon_log_format_has_i
 117                       : !am_server && log_format_has_i;
 118         int i, j;
 119
 120         if (verbose > 2)
 121                 rprintf(FINFO, "send_files starting\n");
 122
 123         while (1) {
 124                 unsigned int offset;
 125
 126                 i = read_int(f_in);
 127                 if (i == -1) {
 128                         if (phase == 0) {
 129                                 phase++;
 130                                 csum_length = SUM_LENGTH;
 131                                 write_int(f_out, -1);
 132                                 if (verbose > 2)
 133                                         rprintf(FINFO, "send_files phase=%d\n", phase);
 134                                 /* For inplace: redo phase turns off the backup
 135                                  * flag so that we do a regular inplace send. */
 136                                 make_backups = 0;
 137                                 continue;
 138                         }
 139                         break;
 140                 }
 141
 142                 if (i < 0 || i >= flist->count) {
 143                         rprintf(FERROR, "Invalid file index %d (count=%d)\n",
 144                                 i, flist->count);
 145                         exit_cleanup(RERR_PROTOCOL);
 146                 }
 147
 148                 file = flist->files[i];
 149                 if (file->dir.root) {
 150                         /* N.B. We're sure that this fits, so offset is OK. */
 151                         offset = strlcpy(fname, file->dir.root, sizeof fname);
 152                         if (!offset || fname[offset-1] != '/')
 153                                 fname[offset++] = '/';
 154                 } else
 155                         offset = 0;
 156                 fname2 = f_name_to(file, fname + offset);
 157
 158                 if (verbose > 2)
 159                         rprintf(FINFO, "send_files(%d, %s)\n", i, fname);
 160
 161                 if (protocol_version >= 29) {
 162                         iflags = read_shortint(f_in);
 163                         if (!(iflags & ITEM_UPDATING) || !S_ISREG(file->mode)) {
 164                                 int see_item = itemizing && (iflags || verbose > 1);
 165                                 write_int(f_out, i);
 166                                 write_shortint(f_out, iflags);
 167                                 if (am_server) {
 168                                         if (am_daemon && !dry_run && see_item)
 169                                                 log_send(file, &stats, iflags);
 170                                 } else if (see_item || iflags & ITEM_UPDATING
 171                                     || (S_ISDIR(file->mode)
 172                                      && iflags & ITEM_REPORT_TIME))
 173                                         log_send(file, &stats, iflags);
 174                                 continue;
 175                         }
 176                 } else
 177                         iflags = ITEM_UPDATING | ITEM_MISSING_DATA;
 178
 179                 if (inplace && protocol_version >= 29) {
 180                         uchar fnamecmp_type = read_byte(f_in);
 181                         updating_basis_file = fnamecmp_type == FNAMECMP_FNAME;
 182                 } else
 183                         updating_basis_file = inplace && !make_backups;
 184
 185                 if (!S_ISREG(file->mode)) {
 186                         rprintf(FERROR, "[%s] got index of non-regular file: %d\n",
 187                                 who_am_i(), i);
 188                         exit_cleanup(RERR_PROTOCOL);
 189                 }
 190
 191                 stats.current_file_index = i;
 192                 stats.num_transferred_files++;
 193                 stats.total_transferred_size += file->length;
 194
 195                 if (dry_run) { /* log the transfer */
 196                         if (!am_server && log_format)
 197                                 log_send(file, &stats, iflags);
 198                         write_int(f_out, i);
 199                         if (protocol_version >= 29)
 200                                 write_shortint(f_out, iflags);
 201                         continue;
 202                 }
 203
 204                 initial_stats = stats;
 205
 206                 if (!(s = receive_sums(f_in))) {
 207                         io_error |= IOERR_GENERAL;
 208                         rprintf(FERROR, "receive_sums failed\n");
 209                         return;
 210                 }
 211
 212                 fd = do_open(fname, O_RDONLY, 0);
 213                 if (fd == -1) {
 214                         if (errno == ENOENT) {
 215                                 enum logcode c = am_daemon
 216                                     && protocol_version < 28 ? FERROR
 217                                                              : FINFO;
 218                                 io_error |= IOERR_VANISHED;
 219                                 rprintf(c, "file has vanished: %s\n",
 220                                         full_fname(fname));
 221                         } else {
 222                                 io_error |= IOERR_GENERAL;
 223                                 rsyserr(FERROR, errno,
 224                                         "send_files failed to open %s",
 225                                         full_fname(fname));
 226                         }
 227                         free_sums(s);
 228                         continue;
 229                 }
 230
 231                 /* map the local file */
 232                 if (do_fstat(fd, &st) != 0) {
 233                         io_error |= IOERR_GENERAL;
 234                         rsyserr(FERROR, errno, "fstat failed");
 235                         free_sums(s);
 236                         close(fd);
 237                         return;
 238                 }
 239
 240                 if (st.st_size) {
 241                         int32 read_size = MAX(s->blength * 3, MAX_MAP_SIZE);
 242                         mbuf = map_file(fd, st.st_size, read_size, s->blength);
 243                 } else
 244                         mbuf = NULL;
 245
 246                 if (verbose > 2) {
 247                         rprintf(FINFO, "send_files mapped %s of size %.0f\n",
 248                                 safe_fname(fname), (double)st.st_size);
 249                 }
 250
 251                 write_int(f_out, i);
 252                 if (protocol_version >= 29)
 253                         write_shortint(f_out, iflags);
 254                 write_sum_head(f_out, s);
 255
 256                 if (verbose > 2) {
 257                         rprintf(FINFO, "calling match_sums %s\n",
 258                                 safe_fname(fname));
 259                 }
 260
 261                 if (log_before_transfer)
 262                         log_send(file, &initial_stats, iflags);
 263                 else if (!am_server && verbose && do_progress)
 264                         rprintf(FINFO, "%s\n", safe_fname(fname2));
 265
 266                 set_compression(fname);
 267
 268                 match_sums(f_out, s, mbuf, st.st_size);
 269                 if (!log_before_transfer)
 270                         log_send(file, &initial_stats, iflags);
 271
 272                 if (mbuf) {
 273                         j = unmap_file(mbuf);
 274                         if (j) {
 275                                 io_error |= IOERR_GENERAL;
 276                                 rsyserr(FERROR, j,
 277                                         "read errors mapping %s",
 278                                         full_fname(fname));
 279                         }
 280                 }
 281                 close(fd);
 282
 283                 free_sums(s);
 284
 285                 if (verbose > 2) {
 286                         rprintf(FINFO, "sender finished %s\n",
 287                                 safe_fname(fname));
 288                 }
 289         }
 290         make_backups = save_make_backups;
 291
 292         if (verbose > 2)
 293                 rprintf(FINFO, "send files finished\n");
 294
 295         match_report();
 296
 297         write_int(f_out, -1);
 298 }