| 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 do_xfers; |
| 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 append_mode; |
| 31 | extern int io_error; |
| 32 | extern int allowed_lull; |
| 33 | extern int protocol_version; |
| 34 | extern int remove_sent_files; |
| 35 | extern int updating_basis_file; |
| 36 | extern int make_backups; |
| 37 | extern int do_progress; |
| 38 | extern int inplace; |
| 39 | extern int batch_fd; |
| 40 | extern int write_batch; |
| 41 | extern struct stats stats; |
| 42 | extern struct file_list *the_file_list; |
| 43 | extern char *log_format; |
| 44 | |
| 45 | |
| 46 | /** |
| 47 | * @file |
| 48 | * |
| 49 | * The sender gets checksums from the generator, calculates deltas, |
| 50 | * and transmits them to the receiver. The sender process runs on the |
| 51 | * machine holding the source files. |
| 52 | **/ |
| 53 | |
| 54 | /** |
| 55 | * Receive the checksums for a buffer |
| 56 | **/ |
| 57 | static struct sum_struct *receive_sums(int f) |
| 58 | { |
| 59 | struct sum_struct *s; |
| 60 | int32 i; |
| 61 | int lull_mod = allowed_lull * 5; |
| 62 | OFF_T offset = 0; |
| 63 | |
| 64 | if (!(s = new(struct sum_struct))) |
| 65 | out_of_memory("receive_sums"); |
| 66 | |
| 67 | read_sum_head(f, s); |
| 68 | |
| 69 | s->sums = NULL; |
| 70 | |
| 71 | if (verbose > 3) { |
| 72 | rprintf(FINFO, "count=%.0f n=%ld rem=%ld\n", |
| 73 | (double)s->count, (long)s->blength, (long)s->remainder); |
| 74 | } |
| 75 | |
| 76 | if (append_mode) { |
| 77 | s->flength = (OFF_T)s->count * s->blength; |
| 78 | if (s->remainder) |
| 79 | s->flength -= s->blength - s->remainder; |
| 80 | return s; |
| 81 | } |
| 82 | |
| 83 | if (s->count == 0) |
| 84 | return(s); |
| 85 | |
| 86 | if (!(s->sums = new_array(struct sum_buf, s->count))) |
| 87 | out_of_memory("receive_sums"); |
| 88 | |
| 89 | for (i = 0; i < s->count; i++) { |
| 90 | s->sums[i].sum1 = read_int(f); |
| 91 | read_buf(f, s->sums[i].sum2, s->s2length); |
| 92 | |
| 93 | s->sums[i].offset = offset; |
| 94 | s->sums[i].flags = 0; |
| 95 | |
| 96 | if (i == s->count-1 && s->remainder != 0) |
| 97 | s->sums[i].len = s->remainder; |
| 98 | else |
| 99 | s->sums[i].len = s->blength; |
| 100 | offset += s->sums[i].len; |
| 101 | |
| 102 | if (allowed_lull && !(i % lull_mod)) |
| 103 | maybe_send_keepalive(); |
| 104 | |
| 105 | if (verbose > 3) { |
| 106 | rprintf(FINFO, |
| 107 | "chunk[%d] len=%d offset=%.0f sum1=%08x\n", |
| 108 | i, s->sums[i].len, (double)s->sums[i].offset, |
| 109 | s->sums[i].sum1); |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | s->flength = offset; |
| 114 | |
| 115 | return s; |
| 116 | } |
| 117 | |
| 118 | void successful_send(int ndx) |
| 119 | { |
| 120 | char fname[MAXPATHLEN]; |
| 121 | struct file_struct *file; |
| 122 | unsigned int offset; |
| 123 | |
| 124 | if (ndx < 0 || ndx >= the_file_list->count) |
| 125 | return; |
| 126 | |
| 127 | file = the_file_list->files[ndx]; |
| 128 | /* The generator might tell us about symlinks we didn't send. */ |
| 129 | if (!(file->flags & FLAG_SENT) && !S_ISLNK(file->mode)) |
| 130 | return; |
| 131 | if (file->dir.root) { |
| 132 | offset = stringjoin(fname, sizeof fname, |
| 133 | file->dir.root, "/", NULL); |
| 134 | } else |
| 135 | offset = 0; |
| 136 | f_name(file, fname + offset); |
| 137 | if (remove_sent_files && do_unlink(fname) == 0 && verbose > 1) |
| 138 | rprintf(FINFO, "sender removed %s\n", fname + offset); |
| 139 | } |
| 140 | |
| 141 | static void write_ndx_and_attrs(int f_out, int ndx, int iflags, |
| 142 | uchar fnamecmp_type, char *buf, int len) |
| 143 | { |
| 144 | write_int(f_out, ndx); |
| 145 | if (protocol_version < 29) |
| 146 | return; |
| 147 | write_shortint(f_out, iflags); |
| 148 | if (iflags & ITEM_BASIS_TYPE_FOLLOWS) |
| 149 | write_byte(f_out, fnamecmp_type); |
| 150 | if (iflags & ITEM_XNAME_FOLLOWS) |
| 151 | write_vstring(f_out, buf, len); |
| 152 | } |
| 153 | |
| 154 | /* This is also used by receive.c with f_out = -1. */ |
| 155 | int read_item_attrs(int f_in, int f_out, int ndx, uchar *type_ptr, |
| 156 | char *buf, int *len_ptr) |
| 157 | { |
| 158 | int len; |
| 159 | uchar fnamecmp_type = FNAMECMP_FNAME; |
| 160 | int iflags = protocol_version >= 29 ? read_shortint(f_in) |
| 161 | : ITEM_TRANSFER | ITEM_MISSING_DATA; |
| 162 | |
| 163 | /* Handle the new keep-alive (no-op) packet. */ |
| 164 | if (ndx == the_file_list->count && iflags == ITEM_IS_NEW) |
| 165 | ; |
| 166 | else if (ndx < 0 || ndx >= the_file_list->count) { |
| 167 | rprintf(FERROR, "Invalid file index: %d (count=%d) [%s]\n", |
| 168 | ndx, the_file_list->count, who_am_i()); |
| 169 | exit_cleanup(RERR_PROTOCOL); |
| 170 | } else if (iflags == ITEM_IS_NEW) { |
| 171 | rprintf(FERROR, "Invalid itemized flag word: %x [%s]\n", |
| 172 | iflags, who_am_i()); |
| 173 | exit_cleanup(RERR_PROTOCOL); |
| 174 | } |
| 175 | |
| 176 | if (iflags & ITEM_BASIS_TYPE_FOLLOWS) |
| 177 | fnamecmp_type = read_byte(f_in); |
| 178 | *type_ptr = fnamecmp_type; |
| 179 | |
| 180 | if (iflags & ITEM_XNAME_FOLLOWS) { |
| 181 | if ((len = read_vstring(f_in, buf, MAXPATHLEN)) < 0) |
| 182 | exit_cleanup(RERR_PROTOCOL); |
| 183 | } else { |
| 184 | *buf = '\0'; |
| 185 | len = -1; |
| 186 | } |
| 187 | *len_ptr = len; |
| 188 | |
| 189 | if (iflags & ITEM_TRANSFER) { |
| 190 | if (!S_ISREG(the_file_list->files[ndx]->mode)) { |
| 191 | rprintf(FERROR, |
| 192 | "received request to transfer non-regular file: %d [%s]\n", |
| 193 | ndx, who_am_i()); |
| 194 | exit_cleanup(RERR_PROTOCOL); |
| 195 | } |
| 196 | } else if (f_out >= 0) { |
| 197 | write_ndx_and_attrs(f_out, ndx, iflags, |
| 198 | fnamecmp_type, buf, len); |
| 199 | } |
| 200 | |
| 201 | return iflags; |
| 202 | } |
| 203 | |
| 204 | void send_files(struct file_list *flist, int f_out, int f_in) |
| 205 | { |
| 206 | int fd = -1; |
| 207 | struct sum_struct *s; |
| 208 | struct map_struct *mbuf = NULL; |
| 209 | STRUCT_STAT st; |
| 210 | char *fname2, fname[MAXPATHLEN]; |
| 211 | char xname[MAXPATHLEN]; |
| 212 | uchar fnamecmp_type; |
| 213 | int iflags, xlen; |
| 214 | struct file_struct *file; |
| 215 | int phase = 0, max_phase = protocol_version >= 29 ? 2 : 1; |
| 216 | struct stats initial_stats; |
| 217 | int save_make_backups = make_backups; |
| 218 | int itemizing = am_daemon ? daemon_log_format_has_i |
| 219 | : !am_server && log_format_has_i; |
| 220 | int f_xfer = write_batch < 0 ? batch_fd : f_out; |
| 221 | int i, j; |
| 222 | |
| 223 | if (verbose > 2) |
| 224 | rprintf(FINFO, "send_files starting\n"); |
| 225 | |
| 226 | while (1) { |
| 227 | unsigned int offset; |
| 228 | |
| 229 | i = read_int(f_in); |
| 230 | if (i == -1) { |
| 231 | if (++phase > max_phase) |
| 232 | break; |
| 233 | csum_length = SUM_LENGTH; |
| 234 | if (verbose > 2) |
| 235 | rprintf(FINFO, "send_files phase=%d\n", phase); |
| 236 | write_int(f_out, -1); |
| 237 | /* For inplace: redo phase turns off the backup |
| 238 | * flag so that we do a regular inplace send. */ |
| 239 | make_backups = 0; |
| 240 | append_mode = 0; |
| 241 | continue; |
| 242 | } |
| 243 | |
| 244 | iflags = read_item_attrs(f_in, f_out, i, &fnamecmp_type, |
| 245 | xname, &xlen); |
| 246 | if (iflags == ITEM_IS_NEW) /* no-op packet */ |
| 247 | continue; |
| 248 | |
| 249 | file = flist->files[i]; |
| 250 | if (file->dir.root) { |
| 251 | /* N.B. We're sure that this fits, so offset is OK. */ |
| 252 | offset = strlcpy(fname, file->dir.root, sizeof fname); |
| 253 | if (!offset || fname[offset-1] != '/') |
| 254 | fname[offset++] = '/'; |
| 255 | } else |
| 256 | offset = 0; |
| 257 | fname2 = f_name(file, fname + offset); |
| 258 | |
| 259 | if (verbose > 2) |
| 260 | rprintf(FINFO, "send_files(%d, %s)\n", i, fname); |
| 261 | |
| 262 | if (!(iflags & ITEM_TRANSFER)) { |
| 263 | maybe_log_item(file, iflags, itemizing, xname); |
| 264 | continue; |
| 265 | } |
| 266 | if (phase == 2) { |
| 267 | rprintf(FERROR, |
| 268 | "got transfer request in phase 2 [%s]\n", |
| 269 | who_am_i()); |
| 270 | exit_cleanup(RERR_PROTOCOL); |
| 271 | } |
| 272 | |
| 273 | updating_basis_file = inplace && (protocol_version >= 29 |
| 274 | ? fnamecmp_type == FNAMECMP_FNAME : !make_backups); |
| 275 | |
| 276 | stats.current_file_index = i; |
| 277 | stats.num_transferred_files++; |
| 278 | stats.total_transferred_size += file->length; |
| 279 | |
| 280 | if (!do_xfers) { /* log the transfer */ |
| 281 | if (!am_server && log_format) |
| 282 | log_item(file, &stats, iflags, NULL); |
| 283 | write_ndx_and_attrs(f_out, i, iflags, fnamecmp_type, |
| 284 | xname, xlen); |
| 285 | continue; |
| 286 | } |
| 287 | |
| 288 | initial_stats = stats; |
| 289 | |
| 290 | if (!(s = receive_sums(f_in))) { |
| 291 | io_error |= IOERR_GENERAL; |
| 292 | rprintf(FERROR, "receive_sums failed\n"); |
| 293 | return; |
| 294 | } |
| 295 | |
| 296 | fd = do_open(fname, O_RDONLY, 0); |
| 297 | if (fd == -1) { |
| 298 | if (errno == ENOENT) { |
| 299 | enum logcode c = am_daemon |
| 300 | && protocol_version < 28 ? FERROR |
| 301 | : FINFO; |
| 302 | io_error |= IOERR_VANISHED; |
| 303 | rprintf(c, "file has vanished: %s\n", |
| 304 | full_fname(fname)); |
| 305 | } else { |
| 306 | io_error |= IOERR_GENERAL; |
| 307 | rsyserr(FERROR, errno, |
| 308 | "send_files failed to open %s", |
| 309 | full_fname(fname)); |
| 310 | } |
| 311 | free_sums(s); |
| 312 | continue; |
| 313 | } |
| 314 | |
| 315 | /* map the local file */ |
| 316 | if (do_fstat(fd, &st) != 0) { |
| 317 | io_error |= IOERR_GENERAL; |
| 318 | rsyserr(FERROR, errno, "fstat failed"); |
| 319 | free_sums(s); |
| 320 | close(fd); |
| 321 | return; |
| 322 | } |
| 323 | |
| 324 | if (st.st_size) { |
| 325 | int32 read_size = MAX(s->blength * 3, MAX_MAP_SIZE); |
| 326 | mbuf = map_file(fd, st.st_size, read_size, s->blength); |
| 327 | } else |
| 328 | mbuf = NULL; |
| 329 | |
| 330 | if (verbose > 2) { |
| 331 | rprintf(FINFO, "send_files mapped %s of size %.0f\n", |
| 332 | fname, (double)st.st_size); |
| 333 | } |
| 334 | |
| 335 | write_ndx_and_attrs(f_out, i, iflags, fnamecmp_type, |
| 336 | xname, xlen); |
| 337 | write_sum_head(f_xfer, s); |
| 338 | |
| 339 | if (verbose > 2) |
| 340 | rprintf(FINFO, "calling match_sums %s\n", fname); |
| 341 | |
| 342 | if (log_before_transfer) |
| 343 | log_item(file, &initial_stats, iflags, NULL); |
| 344 | else if (!am_server && verbose && do_progress) |
| 345 | rprintf(FINFO, "%s\n", fname2); |
| 346 | |
| 347 | set_compression(fname); |
| 348 | |
| 349 | match_sums(f_xfer, s, mbuf, st.st_size); |
| 350 | if (do_progress) |
| 351 | end_progress(st.st_size); |
| 352 | |
| 353 | if (!log_before_transfer) |
| 354 | log_item(file, &initial_stats, iflags, NULL); |
| 355 | |
| 356 | if (mbuf) { |
| 357 | j = unmap_file(mbuf); |
| 358 | if (j) { |
| 359 | io_error |= IOERR_GENERAL; |
| 360 | rsyserr(FERROR, j, |
| 361 | "read errors mapping %s", |
| 362 | full_fname(fname)); |
| 363 | } |
| 364 | } |
| 365 | close(fd); |
| 366 | |
| 367 | free_sums(s); |
| 368 | |
| 369 | if (verbose > 2) |
| 370 | rprintf(FINFO, "sender finished %s\n", fname); |
| 371 | |
| 372 | /* Flag that we actually sent this entry. */ |
| 373 | file->flags |= FLAG_SENT; |
| 374 | } |
| 375 | make_backups = save_make_backups; |
| 376 | |
| 377 | if (verbose > 2) |
| 378 | rprintf(FINFO, "send files finished\n"); |
| 379 | |
| 380 | match_report(); |
| 381 | |
| 382 | write_int(f_out, -1); |
| 383 | } |