2 * Routines only used by the sending process.
4 * Copyright (C) 1996 Andrew Tridgell
5 * Copyright (C) 1996 Paul Mackerras
6 * Copyright (C) 2003-2008 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 3 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, visit the http://fsf.org website.
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;
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;
44 extern int write_batch;
45 extern struct stats stats;
46 extern struct file_list *cur_flist, *first_flist, *dir_flist;
51 * The sender gets checksums from the generator, calculates deltas,
52 * and transmits them to the receiver. The sender process runs on the
53 * machine holding the source files.
57 * Receive the checksums for a buffer
59 static struct sum_struct *receive_sums(int f)
63 int lull_mod = allowed_lull * 5;
66 if (!(s = new(struct sum_struct)))
67 out_of_memory("receive_sums");
73 if (DEBUG_GTE(DELTASUM, 3)) {
74 rprintf(FINFO, "count=%s n=%ld rem=%ld\n",
75 big_num(s->count), (long)s->blength, (long)s->remainder);
78 if (append_mode > 0) {
79 s->flength = (OFF_T)s->count * s->blength;
81 s->flength -= s->blength - s->remainder;
88 if (!(s->sums = new_array(struct sum_buf, s->count)))
89 out_of_memory("receive_sums");
91 for (i = 0; i < s->count; i++) {
92 s->sums[i].sum1 = read_int(f);
93 read_buf(f, s->sums[i].sum2, s->s2length);
95 s->sums[i].offset = offset;
98 if (i == s->count-1 && s->remainder != 0)
99 s->sums[i].len = s->remainder;
101 s->sums[i].len = s->blength;
102 offset += s->sums[i].len;
104 if (allowed_lull && !(i % lull_mod))
105 maybe_send_keepalive();
107 if (DEBUG_GTE(DELTASUM, 3)) {
109 "chunk[%d] len=%d offset=%s sum1=%08x\n",
110 i, s->sums[i].len, big_num(s->sums[i].offset),
120 void successful_send(int ndx)
122 char fname[MAXPATHLEN];
123 struct file_struct *file;
124 struct file_list *flist;
126 if (!remove_source_files)
129 flist = flist_for_ndx(ndx, "successful_send");
130 file = flist->files[ndx - flist->ndx_start];
131 if (!change_pathname(file, NULL, 0))
135 if (do_unlink(fname) == 0) {
136 if (INFO_GTE(REMOVE, 1))
137 rprintf(FINFO, "sender removed %s\n", fname);
139 rsyserr(FERROR, errno, "sender failed to remove %s", fname);
142 static void write_ndx_and_attrs(int f_out, int ndx, int iflags,
143 const char *fname, struct file_struct *file,
144 uchar fnamecmp_type, char *buf, int len)
146 write_ndx(f_out, ndx);
147 if (protocol_version < 29)
149 write_shortint(f_out, iflags);
150 if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
151 write_byte(f_out, fnamecmp_type);
152 if (iflags & ITEM_XNAME_FOLLOWS)
153 write_vstring(f_out, buf, len);
154 #ifdef SUPPORT_XATTRS
155 if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && !dry_run)
156 send_xattr_request(fname, file, f_out);
160 void send_files(int f_in, int f_out)
163 struct sum_struct *s;
164 struct map_struct *mbuf = NULL;
166 char fname[MAXPATHLEN], xname[MAXPATHLEN];
167 const char *path, *slash;
170 struct file_struct *file;
171 int phase = 0, max_phase = protocol_version >= 29 ? 2 : 1;
172 struct stats initial_stats;
173 int itemizing = am_server ? logfile_format_has_i : stdout_format_has_i;
174 enum logcode log_code = log_before_transfer ? FLOG : FINFO;
175 int f_xfer = write_batch < 0 ? batch_fd : f_out;
178 if (DEBUG_GTE(SEND, 1))
179 rprintf(FINFO, "send_files starting\n");
183 send_extra_file_list(f_out, FILECNT_LOOKAHEAD);
185 /* This call also sets cur_flist. */
186 ndx = read_ndx_and_attrs(f_in, &iflags, &fnamecmp_type,
188 if (ndx == NDX_DONE) {
189 if (!am_server && INFO_GTE(PROGRESS, 2) && cur_flist) {
190 set_current_file_index(NULL, 0);
193 if (inc_recurse && first_flist) {
194 flist_free(first_flist);
196 write_ndx(f_out, NDX_DONE);
200 if (++phase > max_phase)
202 if (DEBUG_GTE(SEND, 1))
203 rprintf(FINFO, "send_files phase=%d\n", phase);
204 write_ndx(f_out, NDX_DONE);
209 send_extra_file_list(f_out, FILECNT_LOOKAHEAD);
211 if (ndx - cur_flist->ndx_start >= 0)
212 file = cur_flist->files[ndx - cur_flist->ndx_start];
214 file = dir_flist->files[cur_flist->parent_ndx];
215 if (F_PATHNAME(file)) {
216 path = F_PATHNAME(file);
221 if (!change_pathname(file, NULL, 0))
225 if (DEBUG_GTE(SEND, 1))
226 rprintf(FINFO, "send_files(%d, %s%s%s)\n", ndx, path,slash,fname);
228 #ifdef SUPPORT_XATTRS
229 if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && !dry_run)
230 recv_xattr_request(file, f_in);
233 if (!(iflags & ITEM_TRANSFER)) {
234 maybe_log_item(file, iflags, itemizing, xname);
235 write_ndx_and_attrs(f_out, ndx, iflags, fname, file,
236 fnamecmp_type, xname, xlen);
241 "got transfer request in phase 2 [%s]\n",
243 exit_cleanup(RERR_PROTOCOL);
246 if (file->flags & FLAG_FILE_SENT) {
247 if (csum_length == SHORT_SUM_LENGTH) {
248 /* For inplace: redo phase turns off the backup
249 * flag so that we do a regular inplace send. */
250 make_backups = -make_backups;
251 append_mode = -append_mode;
252 csum_length = SUM_LENGTH;
255 if (csum_length != SHORT_SUM_LENGTH) {
256 make_backups = -make_backups;
257 append_mode = -append_mode;
258 csum_length = SHORT_SUM_LENGTH;
262 updating_basis_file = inplace && (protocol_version >= 29
263 ? fnamecmp_type == FNAMECMP_FNAME : make_backups <= 0);
265 if (!am_server && INFO_GTE(PROGRESS, 1))
266 set_current_file_index(file, ndx);
267 stats.num_transferred_files++;
268 stats.total_transferred_size += F_LENGTH(file);
270 if (!do_xfers) { /* log the transfer */
271 log_item(FCLIENT, file, &stats, iflags, NULL);
272 write_ndx_and_attrs(f_out, ndx, iflags, fname, file,
273 fnamecmp_type, xname, xlen);
277 initial_stats = stats;
279 if (!(s = receive_sums(f_in))) {
280 io_error |= IOERR_GENERAL;
281 rprintf(FERROR_XFER, "receive_sums failed\n");
282 exit_cleanup(RERR_PROTOCOL);
285 fd = do_open(fname, O_RDONLY, 0);
287 if (errno == ENOENT) {
288 enum logcode c = am_daemon
289 && protocol_version < 28 ? FERROR
291 io_error |= IOERR_VANISHED;
292 rprintf(c, "file has vanished: %s\n",
295 io_error |= IOERR_GENERAL;
296 rsyserr(FERROR_XFER, errno,
297 "send_files failed to open %s",
301 if (protocol_version >= 30)
302 send_msg_int(MSG_NO_SEND, ndx);
306 /* map the local file */
307 if (do_fstat(fd, &st) != 0) {
308 io_error |= IOERR_GENERAL;
309 rsyserr(FERROR_XFER, errno, "fstat failed");
312 exit_cleanup(RERR_PROTOCOL);
316 int32 read_size = MAX(s->blength * 3, MAX_MAP_SIZE);
317 mbuf = map_file(fd, st.st_size, read_size, s->blength);
321 if (DEBUG_GTE(DELTASUM, 2)) {
322 rprintf(FINFO, "send_files mapped %s%s%s of size %s\n",
323 path,slash,fname, big_num(st.st_size));
326 write_ndx_and_attrs(f_out, ndx, iflags, fname, file,
327 fnamecmp_type, xname, xlen);
328 write_sum_head(f_xfer, s);
330 if (DEBUG_GTE(DELTASUM, 2))
331 rprintf(FINFO, "calling match_sums %s%s%s\n", path,slash,fname);
333 if (log_before_transfer)
334 log_item(FCLIENT, file, &initial_stats, iflags, NULL);
335 else if (!am_server && INFO_GTE(NAME, 1) && INFO_EQ(PROGRESS, 1))
336 rprintf(FCLIENT, "%s\n", fname);
338 set_compression(fname);
340 match_sums(f_xfer, s, mbuf, st.st_size);
341 if (INFO_GTE(PROGRESS, 1))
342 end_progress(st.st_size);
344 log_item(log_code, file, &initial_stats, iflags, NULL);
347 j = unmap_file(mbuf);
349 io_error |= IOERR_GENERAL;
350 rsyserr(FERROR_XFER, j,
351 "read errors mapping %s",
359 if (DEBUG_GTE(SEND, 1))
360 rprintf(FINFO, "sender finished %s%s%s\n", path,slash,fname);
362 /* Flag that we actually sent this entry. */
363 file->flags |= FLAG_FILE_SENT;
365 if (make_backups < 0)
366 make_backups = -make_backups;
368 if (DEBUG_GTE(SEND, 1))
369 rprintf(FINFO, "send files finished\n");
373 write_ndx(f_out, NDX_DONE);