| 1 | /* |
| 2 | * Routines only used by the sending process. |
| 3 | * |
| 4 | * Copyright (C) 1996 Andrew Tridgell |
| 5 | * Copyright (C) 1996 Paul Mackerras |
| 6 | * Copyright (C) 2003-2007 Wayne Davison |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 3 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License along |
| 19 | * with this program; if not, visit the http://fsf.org website. |
| 20 | */ |
| 21 | |
| 22 | #include "rsync.h" |
| 23 | |
| 24 | extern int verbose; |
| 25 | extern int dry_run; |
| 26 | extern int do_xfers; |
| 27 | extern int am_server; |
| 28 | extern int am_daemon; |
| 29 | extern int inc_recurse; |
| 30 | extern int log_before_transfer; |
| 31 | extern int stdout_format_has_i; |
| 32 | extern int logfile_format_has_i; |
| 33 | extern int csum_length; |
| 34 | extern int append_mode; |
| 35 | extern int io_error; |
| 36 | extern int allowed_lull; |
| 37 | extern int preserve_xattrs; |
| 38 | extern int protocol_version; |
| 39 | extern int remove_source_files; |
| 40 | extern int updating_basis_file; |
| 41 | extern int make_backups; |
| 42 | extern int do_progress; |
| 43 | extern int inplace; |
| 44 | extern int batch_fd; |
| 45 | extern int write_batch; |
| 46 | extern struct stats stats; |
| 47 | extern struct file_list *cur_flist, *first_flist, *dir_flist; |
| 48 | |
| 49 | /** |
| 50 | * @file |
| 51 | * |
| 52 | * The sender gets checksums from the generator, calculates deltas, |
| 53 | * and transmits them to the receiver. The sender process runs on the |
| 54 | * machine holding the source files. |
| 55 | **/ |
| 56 | |
| 57 | /** |
| 58 | * Receive the checksums for a buffer |
| 59 | **/ |
| 60 | static struct sum_struct *receive_sums(int f) |
| 61 | { |
| 62 | struct sum_struct *s; |
| 63 | int32 i; |
| 64 | int lull_mod = allowed_lull * 5; |
| 65 | OFF_T offset = 0; |
| 66 | |
| 67 | if (!(s = new(struct sum_struct))) |
| 68 | out_of_memory("receive_sums"); |
| 69 | |
| 70 | read_sum_head(f, s); |
| 71 | |
| 72 | s->sums = NULL; |
| 73 | |
| 74 | if (verbose > 3) { |
| 75 | rprintf(FINFO, "count=%.0f n=%ld rem=%ld\n", |
| 76 | (double)s->count, (long)s->blength, (long)s->remainder); |
| 77 | } |
| 78 | |
| 79 | if (append_mode > 0) { |
| 80 | s->flength = (OFF_T)s->count * s->blength; |
| 81 | if (s->remainder) |
| 82 | s->flength -= s->blength - s->remainder; |
| 83 | return s; |
| 84 | } |
| 85 | |
| 86 | if (s->count == 0) |
| 87 | return(s); |
| 88 | |
| 89 | if (!(s->sums = new_array(struct sum_buf, s->count))) |
| 90 | out_of_memory("receive_sums"); |
| 91 | |
| 92 | for (i = 0; i < s->count; i++) { |
| 93 | s->sums[i].sum1 = read_int(f); |
| 94 | read_buf(f, s->sums[i].sum2, s->s2length); |
| 95 | |
| 96 | s->sums[i].offset = offset; |
| 97 | s->sums[i].flags = 0; |
| 98 | |
| 99 | if (i == s->count-1 && s->remainder != 0) |
| 100 | s->sums[i].len = s->remainder; |
| 101 | else |
| 102 | s->sums[i].len = s->blength; |
| 103 | offset += s->sums[i].len; |
| 104 | |
| 105 | if (allowed_lull && !(i % lull_mod)) |
| 106 | maybe_send_keepalive(); |
| 107 | |
| 108 | if (verbose > 3) { |
| 109 | rprintf(FINFO, |
| 110 | "chunk[%d] len=%d offset=%.0f sum1=%08x\n", |
| 111 | i, s->sums[i].len, (double)s->sums[i].offset, |
| 112 | s->sums[i].sum1); |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | s->flength = offset; |
| 117 | |
| 118 | return s; |
| 119 | } |
| 120 | |
| 121 | void successful_send(int ndx) |
| 122 | { |
| 123 | char fname[MAXPATHLEN]; |
| 124 | struct file_struct *file; |
| 125 | struct file_list *flist; |
| 126 | |
| 127 | if (!remove_source_files) |
| 128 | return; |
| 129 | |
| 130 | if (!(flist = flist_for_ndx(ndx))) { |
| 131 | rprintf(FERROR, |
| 132 | "INTERNAL ERROR: unable to find flist for item %d\n", |
| 133 | ndx); |
| 134 | return; |
| 135 | } |
| 136 | |
| 137 | file = flist->files[ndx - flist->ndx_start]; |
| 138 | if (!push_pathname(F_PATHNAME(file), -1)) |
| 139 | return; |
| 140 | f_name(file, fname); |
| 141 | |
| 142 | if (do_unlink(fname) == 0) { |
| 143 | if (verbose > 1) |
| 144 | rprintf(FINFO, "sender removed %s\n", fname); |
| 145 | } else |
| 146 | rsyserr(FERROR, errno, "sender failed to remove %s", fname); |
| 147 | } |
| 148 | |
| 149 | static void write_ndx_and_attrs(int f_out, int ndx, int iflags, |
| 150 | const char *fname, struct file_struct *file, |
| 151 | uchar fnamecmp_type, char *buf, int len) |
| 152 | { |
| 153 | write_ndx(f_out, ndx); |
| 154 | if (protocol_version < 29) |
| 155 | return; |
| 156 | write_shortint(f_out, iflags); |
| 157 | if (iflags & ITEM_BASIS_TYPE_FOLLOWS) |
| 158 | write_byte(f_out, fnamecmp_type); |
| 159 | if (iflags & ITEM_XNAME_FOLLOWS) |
| 160 | write_vstring(f_out, buf, len); |
| 161 | #ifdef SUPPORT_XATTRS |
| 162 | if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && !dry_run) |
| 163 | send_xattr_request(fname, file, f_out); |
| 164 | #endif |
| 165 | } |
| 166 | |
| 167 | void send_files(int f_in, int f_out) |
| 168 | { |
| 169 | int fd = -1; |
| 170 | struct sum_struct *s; |
| 171 | struct map_struct *mbuf = NULL; |
| 172 | STRUCT_STAT st; |
| 173 | char fname[MAXPATHLEN], xname[MAXPATHLEN]; |
| 174 | const char *path, *slash; |
| 175 | uchar fnamecmp_type; |
| 176 | int iflags, xlen; |
| 177 | struct file_struct *file; |
| 178 | int phase = 0, max_phase = protocol_version >= 29 ? 2 : 1; |
| 179 | struct stats initial_stats; |
| 180 | int itemizing = am_server ? logfile_format_has_i : stdout_format_has_i; |
| 181 | enum logcode log_code = log_before_transfer ? FLOG : FINFO; |
| 182 | int f_xfer = write_batch < 0 ? batch_fd : f_out; |
| 183 | int ndx, j; |
| 184 | |
| 185 | if (verbose > 2) |
| 186 | rprintf(FINFO, "send_files starting\n"); |
| 187 | |
| 188 | while (1) { |
| 189 | if (inc_recurse) |
| 190 | send_extra_file_list(f_out, FILECNT_LOOKAHEAD); |
| 191 | |
| 192 | /* This call also sets cur_flist. */ |
| 193 | ndx = read_ndx_and_attrs(f_in, &iflags, &fnamecmp_type, |
| 194 | xname, &xlen); |
| 195 | if (ndx == NDX_DONE) { |
| 196 | if (inc_recurse && first_flist) { |
| 197 | flist_free(first_flist); |
| 198 | if (first_flist) { |
| 199 | write_ndx(f_out, NDX_DONE); |
| 200 | continue; |
| 201 | } |
| 202 | } |
| 203 | if (++phase > max_phase) |
| 204 | break; |
| 205 | if (verbose > 2) |
| 206 | rprintf(FINFO, "send_files phase=%d\n", phase); |
| 207 | write_ndx(f_out, NDX_DONE); |
| 208 | continue; |
| 209 | } |
| 210 | |
| 211 | if (inc_recurse) |
| 212 | send_extra_file_list(f_out, FILECNT_LOOKAHEAD); |
| 213 | |
| 214 | if (ndx - cur_flist->ndx_start >= 0) |
| 215 | file = cur_flist->files[ndx - cur_flist->ndx_start]; |
| 216 | else |
| 217 | file = dir_flist->files[cur_flist->parent_ndx]; |
| 218 | if (F_PATHNAME(file)) { |
| 219 | path = F_PATHNAME(file); |
| 220 | slash = "/"; |
| 221 | } else { |
| 222 | path = slash = ""; |
| 223 | } |
| 224 | if (!push_pathname(F_PATHNAME(file), -1)) |
| 225 | continue; |
| 226 | f_name(file, fname); |
| 227 | |
| 228 | if (verbose > 2) |
| 229 | rprintf(FINFO, "send_files(%d, %s%s%s)\n", ndx, path,slash,fname); |
| 230 | |
| 231 | #ifdef SUPPORT_XATTRS |
| 232 | if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && !dry_run) |
| 233 | recv_xattr_request(file, f_in); |
| 234 | #endif |
| 235 | |
| 236 | if (!(iflags & ITEM_TRANSFER)) { |
| 237 | maybe_log_item(file, iflags, itemizing, xname); |
| 238 | write_ndx_and_attrs(f_out, ndx, iflags, fname, file, |
| 239 | fnamecmp_type, xname, xlen); |
| 240 | continue; |
| 241 | } |
| 242 | if (phase == 2) { |
| 243 | rprintf(FERROR, |
| 244 | "got transfer request in phase 2 [%s]\n", |
| 245 | who_am_i()); |
| 246 | exit_cleanup(RERR_PROTOCOL); |
| 247 | } |
| 248 | |
| 249 | if (file->flags & FLAG_FILE_SENT) { |
| 250 | if (csum_length == SHORT_SUM_LENGTH) { |
| 251 | /* For inplace: redo phase turns off the backup |
| 252 | * flag so that we do a regular inplace send. */ |
| 253 | make_backups = -make_backups; |
| 254 | append_mode = -append_mode; |
| 255 | csum_length = SUM_LENGTH; |
| 256 | } |
| 257 | } else { |
| 258 | if (csum_length != SHORT_SUM_LENGTH) { |
| 259 | make_backups = -make_backups; |
| 260 | append_mode = -append_mode; |
| 261 | csum_length = SHORT_SUM_LENGTH; |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | updating_basis_file = inplace && (protocol_version >= 29 |
| 266 | ? fnamecmp_type == FNAMECMP_FNAME : make_backups <= 0); |
| 267 | |
| 268 | if (!am_server && do_progress) |
| 269 | set_current_file_index(file, ndx); |
| 270 | stats.num_transferred_files++; |
| 271 | stats.total_transferred_size += F_LENGTH(file); |
| 272 | |
| 273 | if (!do_xfers) { /* log the transfer */ |
| 274 | log_item(FCLIENT, file, &stats, iflags, NULL); |
| 275 | write_ndx_and_attrs(f_out, ndx, iflags, fname, file, |
| 276 | fnamecmp_type, xname, xlen); |
| 277 | continue; |
| 278 | } |
| 279 | |
| 280 | initial_stats = stats; |
| 281 | |
| 282 | if (!(s = receive_sums(f_in))) { |
| 283 | io_error |= IOERR_GENERAL; |
| 284 | rprintf(FERROR, "receive_sums failed\n"); |
| 285 | exit_cleanup(RERR_PROTOCOL); |
| 286 | } |
| 287 | |
| 288 | fd = do_open(fname, O_RDONLY, 0); |
| 289 | if (fd == -1) { |
| 290 | if (errno == ENOENT) { |
| 291 | enum logcode c = am_daemon |
| 292 | && protocol_version < 28 ? FERROR |
| 293 | : FWARNING; |
| 294 | io_error |= IOERR_VANISHED; |
| 295 | rprintf(c, "file has vanished: %s\n", |
| 296 | full_fname(fname)); |
| 297 | } else { |
| 298 | io_error |= IOERR_GENERAL; |
| 299 | rsyserr(FERROR_XFER, errno, |
| 300 | "send_files failed to open %s", |
| 301 | full_fname(fname)); |
| 302 | } |
| 303 | free_sums(s); |
| 304 | if (protocol_version >= 30) |
| 305 | send_msg_int(MSG_NO_SEND, ndx); |
| 306 | continue; |
| 307 | } |
| 308 | |
| 309 | /* map the local file */ |
| 310 | if (do_fstat(fd, &st) != 0) { |
| 311 | io_error |= IOERR_GENERAL; |
| 312 | rsyserr(FERROR, errno, "fstat failed"); |
| 313 | free_sums(s); |
| 314 | close(fd); |
| 315 | exit_cleanup(RERR_PROTOCOL); |
| 316 | } |
| 317 | |
| 318 | if (st.st_size) { |
| 319 | int32 read_size = MAX(s->blength * 3, MAX_MAP_SIZE); |
| 320 | mbuf = map_file(fd, st.st_size, read_size, s->blength); |
| 321 | } else |
| 322 | mbuf = NULL; |
| 323 | |
| 324 | if (verbose > 2) { |
| 325 | rprintf(FINFO, "send_files mapped %s%s%s of size %.0f\n", |
| 326 | path,slash,fname, (double)st.st_size); |
| 327 | } |
| 328 | |
| 329 | write_ndx_and_attrs(f_out, ndx, iflags, fname, file, |
| 330 | fnamecmp_type, xname, xlen); |
| 331 | write_sum_head(f_xfer, s); |
| 332 | |
| 333 | if (verbose > 2) |
| 334 | rprintf(FINFO, "calling match_sums %s%s%s\n", path,slash,fname); |
| 335 | |
| 336 | if (log_before_transfer) |
| 337 | log_item(FCLIENT, file, &initial_stats, iflags, NULL); |
| 338 | else if (!am_server && verbose && do_progress) |
| 339 | rprintf(FCLIENT, "%s\n", fname); |
| 340 | |
| 341 | set_compression(fname); |
| 342 | |
| 343 | match_sums(f_xfer, s, mbuf, st.st_size); |
| 344 | if (do_progress) |
| 345 | end_progress(st.st_size); |
| 346 | |
| 347 | log_item(log_code, file, &initial_stats, iflags, NULL); |
| 348 | |
| 349 | if (mbuf) { |
| 350 | j = unmap_file(mbuf); |
| 351 | if (j) { |
| 352 | io_error |= IOERR_GENERAL; |
| 353 | rsyserr(FERROR_XFER, j, |
| 354 | "read errors mapping %s", |
| 355 | full_fname(fname)); |
| 356 | } |
| 357 | } |
| 358 | close(fd); |
| 359 | |
| 360 | free_sums(s); |
| 361 | |
| 362 | if (verbose > 2) |
| 363 | rprintf(FINFO, "sender finished %s%s%s\n", path,slash,fname); |
| 364 | |
| 365 | /* Flag that we actually sent this entry. */ |
| 366 | file->flags |= FLAG_FILE_SENT; |
| 367 | } |
| 368 | if (make_backups < 0) |
| 369 | make_backups = -make_backups; |
| 370 | |
| 371 | if (verbose > 2) |
| 372 | rprintf(FINFO, "send files finished\n"); |
| 373 | |
| 374 | match_report(); |
| 375 | |
| 376 | write_ndx(f_out, NDX_DONE); |
| 377 | } |