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