2 * Routines only used by the sending process.
4 * Copyright (C) 1996 Andrew Tridgell
5 * Copyright (C) 1996 Paul Mackerras
6 * Copyright (C) 2003, 2004, 2005, 2006 Wayne Davison
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 2 of the License, or
11 * (at your option) any later version.
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.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
29 extern int log_before_transfer;
30 extern int log_format_has_i;
31 extern int logfile_format_has_i;
32 extern int csum_length;
33 extern int append_mode;
35 extern int allowed_lull;
36 extern int protocol_version;
37 extern int remove_sent_files;
38 extern int updating_basis_file;
39 extern int make_backups;
40 extern int do_progress;
43 extern int write_batch;
44 extern struct stats stats;
45 extern struct file_list *the_file_list;
46 extern char *log_format;
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.
58 * Receive the checksums for a buffer
60 static struct sum_struct *receive_sums(int f)
64 int lull_mod = allowed_lull * 5;
67 if (!(s = new(struct sum_struct)))
68 out_of_memory("receive_sums");
75 rprintf(FINFO, "count=%.0f n=%ld rem=%ld\n",
76 (double)s->count, (long)s->blength, (long)s->remainder);
80 s->flength = (OFF_T)s->count * s->blength;
82 s->flength -= s->blength - s->remainder;
89 if (!(s->sums = new_array(struct sum_buf, s->count)))
90 out_of_memory("receive_sums");
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);
96 s->sums[i].offset = offset;
99 if (i == s->count-1 && s->remainder != 0)
100 s->sums[i].len = s->remainder;
102 s->sums[i].len = s->blength;
103 offset += s->sums[i].len;
105 if (allowed_lull && !(i % lull_mod))
106 maybe_send_keepalive();
110 "chunk[%d] len=%d offset=%.0f sum1=%08x\n",
111 i, s->sums[i].len, (double)s->sums[i].offset,
121 void successful_send(int ndx)
123 char fname[MAXPATHLEN];
124 struct file_struct *file;
127 if (ndx < 0 || ndx >= the_file_list->count)
130 file = the_file_list->files[ndx];
131 /* The generator might tell us about symlinks we didn't send. */
132 if (!(file->flags & FLAG_SENT) && !S_ISLNK(file->mode))
134 if (file->dir.root) {
135 offset = stringjoin(fname, sizeof fname,
136 file->dir.root, "/", NULL);
139 f_name(file, fname + offset);
140 if (remove_sent_files && do_unlink(fname) == 0 && verbose > 1)
141 rprintf(FINFO, "sender removed %s\n", fname + offset);
144 static void write_ndx_and_attrs(int f_out, int ndx, int iflags,
145 uchar fnamecmp_type, char *buf, int len)
147 write_int(f_out, ndx);
148 if (protocol_version < 29)
150 write_shortint(f_out, iflags);
151 if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
152 write_byte(f_out, fnamecmp_type);
153 if (iflags & ITEM_XNAME_FOLLOWS)
154 write_vstring(f_out, buf, len);
157 /* This is also used by receive.c with f_out = -1. */
158 int read_item_attrs(int f_in, int f_out, int ndx, uchar *type_ptr,
159 char *buf, int *len_ptr)
162 uchar fnamecmp_type = FNAMECMP_FNAME;
163 int iflags = protocol_version >= 29 ? read_shortint(f_in)
164 : ITEM_TRANSFER | ITEM_MISSING_DATA;
166 /* Handle the new keep-alive (no-op) packet. */
167 if (ndx == the_file_list->count && iflags == ITEM_IS_NEW)
169 else if (ndx < 0 || ndx >= the_file_list->count) {
170 rprintf(FERROR, "Invalid file index: %d (count=%d) [%s]\n",
171 ndx, the_file_list->count, who_am_i());
172 exit_cleanup(RERR_PROTOCOL);
173 } else if (iflags == ITEM_IS_NEW) {
174 rprintf(FERROR, "Invalid itemized flag word: %x [%s]\n",
176 exit_cleanup(RERR_PROTOCOL);
179 if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
180 fnamecmp_type = read_byte(f_in);
181 *type_ptr = fnamecmp_type;
183 if (iflags & ITEM_XNAME_FOLLOWS) {
184 if ((len = read_vstring(f_in, buf, MAXPATHLEN)) < 0)
185 exit_cleanup(RERR_PROTOCOL);
192 if (iflags & ITEM_TRANSFER) {
193 if (!S_ISREG(the_file_list->files[ndx]->mode)) {
195 "received request to transfer non-regular file: %d [%s]\n",
197 exit_cleanup(RERR_PROTOCOL);
199 } else if (f_out >= 0) {
200 write_ndx_and_attrs(f_out, ndx, iflags,
201 fnamecmp_type, buf, len);
207 void send_files(struct file_list *flist, int f_out, int f_in)
210 struct sum_struct *s;
211 struct map_struct *mbuf = NULL;
213 char *fname2, fname[MAXPATHLEN];
214 char xname[MAXPATHLEN];
217 struct file_struct *file;
218 int phase = 0, max_phase = protocol_version >= 29 ? 2 : 1;
219 struct stats initial_stats;
220 int save_make_backups = make_backups;
221 int itemizing = am_server ? logfile_format_has_i : log_format_has_i;
222 int f_xfer = write_batch < 0 ? batch_fd : f_out;
226 rprintf(FINFO, "send_files starting\n");
233 if (++phase > max_phase)
235 csum_length = SUM_LENGTH;
237 rprintf(FINFO, "send_files phase=%d\n", phase);
238 write_int(f_out, -1);
239 /* For inplace: redo phase turns off the backup
240 * flag so that we do a regular inplace send. */
246 iflags = read_item_attrs(f_in, f_out, i, &fnamecmp_type,
248 if (iflags == ITEM_IS_NEW) /* no-op packet */
251 file = flist->files[i];
252 if (file->dir.root) {
253 /* N.B. We're sure that this fits, so offset is OK. */
254 offset = strlcpy(fname, file->dir.root, sizeof fname);
255 if (!offset || fname[offset-1] != '/')
256 fname[offset++] = '/';
259 fname2 = f_name(file, fname + offset);
262 rprintf(FINFO, "send_files(%d, %s)\n", i, fname);
264 if (!(iflags & ITEM_TRANSFER)) {
265 maybe_log_item(file, iflags, itemizing, xname);
270 "got transfer request in phase 2 [%s]\n",
272 exit_cleanup(RERR_PROTOCOL);
275 updating_basis_file = inplace && (protocol_version >= 29
276 ? fnamecmp_type == FNAMECMP_FNAME : !make_backups);
278 stats.current_file_index = i;
279 stats.num_transferred_files++;
280 stats.total_transferred_size += file->length;
282 if (!do_xfers) { /* log the transfer */
283 if (!am_server && log_format)
284 log_item(file, &stats, iflags, NULL);
285 write_ndx_and_attrs(f_out, i, iflags, fnamecmp_type,
290 initial_stats = stats;
292 if (!(s = receive_sums(f_in))) {
293 io_error |= IOERR_GENERAL;
294 rprintf(FERROR, "receive_sums failed\n");
298 fd = do_open(fname, O_RDONLY, 0);
300 if (errno == ENOENT) {
301 enum logcode c = am_daemon
302 && protocol_version < 28 ? FERROR
304 io_error |= IOERR_VANISHED;
305 rprintf(c, "file has vanished: %s\n",
308 io_error |= IOERR_GENERAL;
309 rsyserr(FERROR, errno,
310 "send_files failed to open %s",
317 /* map the local file */
318 if (do_fstat(fd, &st) != 0) {
319 io_error |= IOERR_GENERAL;
320 rsyserr(FERROR, errno, "fstat failed");
327 int32 read_size = MAX(s->blength * 3, MAX_MAP_SIZE);
328 mbuf = map_file(fd, st.st_size, read_size, s->blength);
333 rprintf(FINFO, "send_files mapped %s of size %.0f\n",
334 fname, (double)st.st_size);
337 write_ndx_and_attrs(f_out, i, iflags, fnamecmp_type,
339 write_sum_head(f_xfer, s);
342 rprintf(FINFO, "calling match_sums %s\n", fname);
344 if (log_before_transfer)
345 log_item(file, &initial_stats, iflags, NULL);
346 else if (!am_server && verbose && do_progress)
347 rprintf(FINFO, "%s\n", fname2);
349 set_compression(fname);
351 match_sums(f_xfer, s, mbuf, st.st_size);
353 end_progress(st.st_size);
355 if (!log_before_transfer)
356 log_item(file, &initial_stats, iflags, NULL);
359 j = unmap_file(mbuf);
361 io_error |= IOERR_GENERAL;
363 "read errors mapping %s",
372 rprintf(FINFO, "sender finished %s\n", fname);
374 /* Flag that we actually sent this entry. */
375 file->flags |= FLAG_SENT;
377 make_backups = save_make_backups;
380 rprintf(FINFO, "send files finished\n");
384 write_int(f_out, -1);