Commit | Line | Data |
---|---|---|
0f78b815 WD |
1 | /* |
2 | * Socket and pipe I/O utilities used in rsync. | |
d62bcc17 | 3 | * |
0f78b815 WD |
4 | * Copyright (C) 1996-2001 Andrew Tridgell |
5 | * Copyright (C) 1996 Paul Mackerras | |
6 | * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org> | |
b3bf9b9d | 7 | * Copyright (C) 2003-2009 Wayne Davison |
d62bcc17 | 8 | * |
880da007 | 9 | * This program is free software; you can redistribute it and/or modify |
8e41b68e WD |
10 | * it under the terms of the GNU General Public License as published by |
11 | * the Free Software Foundation; either version 3 of the License, or | |
12 | * (at your option) any later version. | |
d62bcc17 | 13 | * |
880da007 MP |
14 | * This program is distributed in the hope that it will be useful, |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
d62bcc17 | 18 | * |
e7c67065 | 19 | * You should have received a copy of the GNU General Public License along |
4fd842f9 | 20 | * with this program; if not, visit the http://fsf.org website. |
880da007 | 21 | */ |
720b47f2 | 22 | |
0f78b815 WD |
23 | /* Rsync provides its own multiplexing system, which is used to send |
24 | * stderr and stdout over a single socket. | |
87ee2481 MP |
25 | * |
26 | * For historical reasons this is off during the start of the | |
27 | * connection, but it's switched on quite early using | |
0f78b815 | 28 | * io_start_multiplex_out() and io_start_multiplex_in(). */ |
720b47f2 | 29 | |
720b47f2 | 30 | #include "rsync.h" |
1b42f628 | 31 | #include "ifuncs.h" |
5dd14f0c | 32 | #include "inums.h" |
720b47f2 | 33 | |
880da007 | 34 | /** If no timeout is specified then use a 60 second select timeout */ |
8cd9fd4e AT |
35 | #define SELECT_TIMEOUT 60 |
36 | ||
7a55d06e | 37 | extern int bwlimit; |
71e58630 | 38 | extern size_t bwlimit_writemax; |
6ba9279f | 39 | extern int io_timeout; |
d17e1dd2 WD |
40 | extern int am_server; |
41 | extern int am_daemon; | |
42 | extern int am_sender; | |
98f8c9a5 | 43 | extern int am_generator; |
20caffd2 | 44 | extern int msgs2stderr; |
3ea6e0e7 | 45 | extern int inc_recurse; |
8ef246e0 | 46 | extern int io_error; |
e626b29e | 47 | extern int eol_nulls; |
8ef246e0 | 48 | extern int flist_eof; |
ce827c3e WD |
49 | extern int file_total; |
50 | extern int file_old_total; | |
7f9bf6b7 | 51 | extern int list_only; |
3b0a30eb | 52 | extern int read_batch; |
ba525f77 | 53 | extern int protect_args; |
b9f592fb WD |
54 | extern int checksum_seed; |
55 | extern int protocol_version; | |
47c11975 | 56 | extern int remove_source_files; |
cdf236aa | 57 | extern int preserve_hard_links; |
7a7810aa | 58 | extern BOOL extra_flist_sending_enabled; |
a800434a | 59 | extern struct stats stats; |
19531e1f | 60 | extern struct file_list *cur_flist; |
332cf6df | 61 | #ifdef ICONV_OPTION |
ba525f77 | 62 | extern int filesfrom_convert; |
332cf6df WD |
63 | extern iconv_t ic_send, ic_recv; |
64 | #endif | |
720b47f2 | 65 | |
93465f51 WD |
66 | int csum_length = SHORT_SUM_LENGTH; /* initial value */ |
67 | int allowed_lull = 0; | |
9e2409ab | 68 | int ignore_timeout = 0; |
b9f592fb | 69 | int batch_fd = -1; |
04c722d5 | 70 | int msgdone_cnt = 0; |
20caffd2 | 71 | int forward_flist_data = 0; |
805edf9d | 72 | |
cb2e1f18 | 73 | /* Ignore an EOF error if non-zero. See whine_about_eof(). */ |
574c2500 | 74 | int kluge_around_eof = 0; |
7a55d06e | 75 | |
cdf236aa WD |
76 | int sock_f_in = -1; |
77 | int sock_f_out = -1; | |
7a55d06e | 78 | |
4dde3347 WD |
79 | int64 total_data_read = 0; |
80 | int64 total_data_written = 0; | |
81 | ||
20caffd2 WD |
82 | static struct { |
83 | xbuf in, out, msg; | |
84 | int in_fd; | |
85 | int out_fd; /* Both "out" and "msg" go to this fd. */ | |
86 | BOOL in_multiplexed; | |
87 | unsigned out_empty_len; | |
88 | size_t raw_data_header_pos; /* in the out xbuf */ | |
89 | size_t raw_flushing_ends_before; /* in the out xbuf */ | |
90 | size_t raw_input_ends_before; /* in the in xbuf */ | |
91 | } iobuf = { .in_fd = -1, .out_fd = -1 }; | |
8ef246e0 | 92 | |
3b0a30eb WD |
93 | static time_t last_io_in; |
94 | static time_t last_io_out; | |
1f75bb10 | 95 | |
b9f592fb WD |
96 | static int write_batch_monitor_in = -1; |
97 | static int write_batch_monitor_out = -1; | |
98 | ||
20caffd2 | 99 | static int ff_forward_fd = -1; |
8e6b4ddb WD |
100 | static int ff_reenable_multiplex = -1; |
101 | static char ff_lastchar = '\0'; | |
cbc63a09 | 102 | static xbuf ff_xb = EMPTY_XBUF; |
332cf6df | 103 | #ifdef ICONV_OPTION |
ba525f77 | 104 | static xbuf iconv_buf = EMPTY_XBUF; |
332cf6df | 105 | #endif |
3b0a30eb | 106 | static int select_timeout = SELECT_TIMEOUT; |
d6081c82 WD |
107 | static int active_filecnt = 0; |
108 | static OFF_T active_bytecnt = 0; | |
7f9bf6b7 | 109 | static int first_message = 1; |
720b47f2 | 110 | |
351e23ad WD |
111 | static char int_byte_extra[64] = { |
112 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* (00 - 3F)/4 */ | |
113 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* (40 - 7F)/4 */ | |
114 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* (80 - BF)/4 */ | |
115 | 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 5, 6, /* (C0 - FF)/4 */ | |
482f48cc WD |
116 | }; |
117 | ||
20caffd2 WD |
118 | #define IN_MULTIPLEXED (iobuf.in_multiplexed) |
119 | #define OUT_MULTIPLEXED (iobuf.out_empty_len != 0) | |
29349024 | 120 | |
20caffd2 WD |
121 | #define PIO_NEED_INPUT (1<<0) /* The *_NEED_* flags are mutually exclusive. */ |
122 | #define PIO_NEED_OUTROOM (1<<1) | |
123 | #define PIO_NEED_MSGROOM (1<<2) | |
ff41a59f | 124 | |
20caffd2 | 125 | #define PIO_CONSUME_INPUT (1<<4) /* Must becombined with PIO_NEED_INPUT. */ |
d17e1dd2 | 126 | |
20caffd2 WD |
127 | #define PIO_INPUT_AND_CONSUME (PIO_NEED_INPUT | PIO_CONSUME_INPUT) |
128 | #define PIO_NEED_FLAGS (PIO_NEED_INPUT | PIO_NEED_OUTROOM | PIO_NEED_MSGROOM) | |
d17e1dd2 | 129 | |
20caffd2 WD |
130 | #define REMOTE_OPTION_ERROR "rsync: on remote machine: -" |
131 | #define REMOTE_OPTION_ERROR2 ": unknown option" | |
08c88178 | 132 | |
20caffd2 | 133 | #define FILESFROM_BUFLEN 2048 |
d17e1dd2 | 134 | |
20caffd2 | 135 | enum festatus { FES_SUCCESS, FES_REDO, FES_NO_SEND }; |
29349024 | 136 | |
20caffd2 | 137 | static flist_ndx_list redo_list, hlink_list; |
29349024 | 138 | |
20caffd2 | 139 | static void sleep_for_bwlimit(int bytes_written); |
29349024 | 140 | |
8d9dc9f9 AT |
141 | static void check_timeout(void) |
142 | { | |
143 | time_t t; | |
90ba34e2 | 144 | |
9e2409ab | 145 | if (!io_timeout || ignore_timeout) |
d17e1dd2 | 146 | return; |
8d9dc9f9 | 147 | |
3b0a30eb WD |
148 | if (!last_io_in) { |
149 | last_io_in = time(NULL); | |
8d9dc9f9 AT |
150 | return; |
151 | } | |
152 | ||
153 | t = time(NULL); | |
154 | ||
3b0a30eb | 155 | if (t - last_io_in >= io_timeout) { |
0adb99b9 | 156 | if (!am_server && !am_daemon) { |
4ccfd96c | 157 | rprintf(FERROR, "io timeout after %d seconds -- exiting\n", |
3b0a30eb | 158 | (int)(t-last_io_in)); |
0adb99b9 | 159 | } |
65417579 | 160 | exit_cleanup(RERR_TIMEOUT); |
8d9dc9f9 AT |
161 | } |
162 | } | |
163 | ||
20caffd2 WD |
164 | /* It's almost always an error to get an EOF when we're trying to read from the |
165 | * network, because the protocol is (for the most part) self-terminating. | |
166 | * | |
167 | * There is one case for the receiver when it is at the end of the transfer | |
168 | * (hanging around reading any keep-alive packets that might come its way): if | |
169 | * the sender dies before the generator's kill-signal comes through, we can end | |
170 | * up here needing to loop until the kill-signal arrives. In this situation, | |
171 | * kluge_around_eof will be < 0. | |
172 | * | |
173 | * There is another case for older protocol versions (< 24) where the module | |
174 | * listing was not terminated, so we must ignore an EOF error in that case and | |
175 | * exit. In this situation, kluge_around_eof will be > 0. */ | |
176 | static NORETURN void whine_about_eof(int fd) | |
d17e1dd2 | 177 | { |
20caffd2 WD |
178 | if (kluge_around_eof && fd == sock_f_in) { |
179 | int i; | |
180 | if (kluge_around_eof > 0) | |
181 | exit_cleanup(0); | |
182 | /* If we're still here after 10 seconds, exit with an error. */ | |
183 | for (i = 10*1000/20; i--; ) | |
184 | msleep(20); | |
185 | } | |
d17e1dd2 | 186 | |
20caffd2 WD |
187 | rprintf(FERROR, RSYNC_NAME ": connection unexpectedly closed " |
188 | "(%s bytes received so far) [%s]\n", | |
189 | big_num(stats.total_read), who_am_i()); | |
d17e1dd2 | 190 | |
20caffd2 | 191 | exit_cleanup(RERR_STREAMIO); |
554e0a8d AT |
192 | } |
193 | ||
20caffd2 WD |
194 | /* Do a safe read, handling any needed looping and error handling. |
195 | * Returns the count of the bytes read, which will only be different | |
196 | * from "len" if we encountered an EOF. This routine is not used on | |
197 | * the socket except very early in the transfer. */ | |
198 | static size_t safe_read(int fd, char *buf, size_t len) | |
0b789446 | 199 | { |
20caffd2 WD |
200 | size_t got; |
201 | int n; | |
0b789446 | 202 | |
20caffd2 | 203 | assert(fd != iobuf.in_fd); |
0b789446 | 204 | |
20caffd2 WD |
205 | n = read(fd, buf, len); |
206 | if ((size_t)n == len || n == 0) { | |
207 | if (DEBUG_GTE(IO, 2)) | |
208 | rprintf(FINFO, "[%s] safe_read(%d)=%ld\n", who_am_i(), fd, (long)n); | |
209 | return n; | |
3be97bf9 | 210 | } |
20caffd2 WD |
211 | if (n < 0) { |
212 | if (errno != EINTR && errno != EWOULDBLOCK && errno != EAGAIN) { | |
213 | read_failed: | |
214 | rsyserr(FERROR, errno, "safe_read failed to read %ld bytes [%s]", | |
215 | (long)len, who_am_i()); | |
216 | exit_cleanup(RERR_STREAMIO); | |
217 | } | |
218 | got = 0; | |
219 | } else | |
220 | got = n; | |
3be97bf9 | 221 | |
20caffd2 WD |
222 | while (1) { |
223 | struct timeval tv; | |
224 | fd_set r_fds, e_fds; | |
225 | int cnt; | |
7f9bf6b7 | 226 | |
20caffd2 WD |
227 | FD_ZERO(&r_fds); |
228 | FD_SET(fd, &r_fds); | |
229 | FD_ZERO(&e_fds); | |
230 | FD_SET(fd, &e_fds); | |
231 | tv.tv_sec = select_timeout; | |
232 | tv.tv_usec = 0; | |
7f9bf6b7 | 233 | |
20caffd2 WD |
234 | cnt = select(fd+1, &r_fds, NULL, &e_fds, &tv); |
235 | if (cnt <= 0) { | |
236 | if (cnt < 0 && errno == EBADF) { | |
237 | rsyserr(FERROR, errno, "safe_read select failed [%s]", | |
238 | who_am_i()); | |
239 | exit_cleanup(RERR_FILEIO); | |
240 | } | |
241 | check_timeout(); | |
242 | continue; | |
243 | } | |
7f9bf6b7 | 244 | |
20caffd2 WD |
245 | /*if (FD_ISSET(fd, &e_fds)) |
246 | rprintf(FINFO, "select exception on fd %d\n", fd); */ | |
7f9bf6b7 | 247 | |
20caffd2 WD |
248 | if (FD_ISSET(fd, &r_fds)) { |
249 | n = read(fd, buf + got, len - got); | |
250 | if (DEBUG_GTE(IO, 2)) | |
251 | rprintf(FINFO, "[%s] safe_read(%d)=%ld\n", who_am_i(), fd, (long)n); | |
252 | if (n == 0) | |
253 | break; | |
254 | if (n < 0) { | |
255 | if (errno == EINTR) | |
256 | continue; | |
257 | goto read_failed; | |
258 | } | |
259 | if ((got += (size_t)n) == len) | |
260 | break; | |
261 | } | |
7f9bf6b7 | 262 | } |
20caffd2 WD |
263 | |
264 | return got; | |
7f9bf6b7 WD |
265 | } |
266 | ||
20caffd2 | 267 | static const char *what_fd_is(int fd) |
d6081c82 | 268 | { |
20caffd2 | 269 | static char buf[20]; |
d6081c82 | 270 | |
20caffd2 WD |
271 | if (fd == sock_f_out) |
272 | return "socket"; | |
273 | else if (fd == iobuf.out_fd) | |
274 | return "message fd"; | |
275 | else if (fd == batch_fd) | |
276 | return "batch file"; | |
277 | else { | |
278 | snprintf(buf, sizeof buf, "fd %d", fd); | |
279 | return buf; | |
280 | } | |
d6081c82 WD |
281 | } |
282 | ||
20caffd2 WD |
283 | /* Do a safe write, handling any needed looping and error handling. |
284 | * Returns only if everything was successfully written. This routine | |
285 | * is not used on the socket except very early in the transfer. */ | |
286 | static void safe_write(int fd, const char *buf, size_t len) | |
d17e1dd2 | 287 | { |
20caffd2 | 288 | int n; |
ee6e80c7 | 289 | |
20caffd2 | 290 | assert(fd != iobuf.out_fd); |
332cf6df | 291 | |
20caffd2 WD |
292 | n = write(fd, buf, len); |
293 | if ((size_t)n == len) | |
294 | return; | |
295 | if (n < 0) { | |
296 | if (errno != EINTR && errno != EWOULDBLOCK && errno != EAGAIN) { | |
297 | write_failed: | |
298 | rsyserr(FERROR, errno, | |
299 | "safe_write failed to write %ld bytes to %s [%s]", | |
300 | (long)len, what_fd_is(fd), who_am_i()); | |
301 | exit_cleanup(RERR_STREAMIO); | |
ee6e80c7 | 302 | } |
20caffd2 WD |
303 | } else { |
304 | buf += n; | |
305 | len -= n; | |
306 | } | |
ee6e80c7 | 307 | |
20caffd2 WD |
308 | while (len) { |
309 | struct timeval tv; | |
310 | fd_set w_fds; | |
311 | int cnt; | |
3be97bf9 | 312 | |
20caffd2 WD |
313 | FD_ZERO(&w_fds); |
314 | FD_SET(fd, &w_fds); | |
315 | tv.tv_sec = select_timeout; | |
316 | tv.tv_usec = 0; | |
17a4977b | 317 | |
20caffd2 WD |
318 | cnt = select(fd + 1, NULL, &w_fds, NULL, &tv); |
319 | if (cnt <= 0) { | |
320 | if (cnt < 0 && errno == EBADF) { | |
321 | rsyserr(FERROR, errno, "safe_write select failed on %s [%s]", | |
322 | what_fd_is(fd), who_am_i()); | |
323 | exit_cleanup(RERR_FILEIO); | |
324 | } | |
325 | check_timeout(); | |
326 | continue; | |
327 | } | |
d17e1dd2 | 328 | |
20caffd2 WD |
329 | if (FD_ISSET(fd, &w_fds)) { |
330 | n = write(fd, buf, len); | |
331 | if (n < 0) { | |
332 | if (errno == EINTR) | |
333 | continue; | |
334 | goto write_failed; | |
335 | } | |
336 | buf += n; | |
337 | len -= n; | |
338 | } | |
37f35d89 | 339 | } |
37f35d89 WD |
340 | } |
341 | ||
20caffd2 WD |
342 | /* This is only called when files-from data is known to be available. We read |
343 | * a chunk of data and put it into the output buffer. */ | |
344 | static void forward_filesfrom_data(void) | |
155d9206 | 345 | { |
20caffd2 | 346 | int len; |
20caffd2 | 347 | |
cbc63a09 | 348 | len = read(ff_forward_fd, ff_xb.buf + ff_xb.len, ff_xb.size - ff_xb.len); |
20caffd2 WD |
349 | if (len <= 0) { |
350 | if (len == 0 || errno != EINTR) { | |
351 | /* Send end-of-file marker */ | |
20caffd2 | 352 | ff_forward_fd = -1; |
cbc63a09 WD |
353 | write_buf(iobuf.out_fd, "\0\0", ff_lastchar ? 2 : 1); |
354 | free_xbuf(&ff_xb); | |
8e6b4ddb WD |
355 | if (ff_reenable_multiplex >= 0) |
356 | io_start_multiplex_out(ff_reenable_multiplex); | |
20caffd2 | 357 | } |
0b789446 | 358 | return; |
20caffd2 | 359 | } |
554e0a8d | 360 | |
20caffd2 WD |
361 | if (DEBUG_GTE(IO, 2)) |
362 | rprintf(FINFO, "[%s] files-from read=%ld\n", who_am_i(), (long)len); | |
554e0a8d | 363 | |
cbc63a09 WD |
364 | #ifdef ICONV_OPTION |
365 | len += ff_xb.len; | |
366 | #endif | |
367 | ||
20caffd2 | 368 | if (!eol_nulls) { |
cbc63a09 | 369 | char *s = ff_xb.buf + len; |
20caffd2 | 370 | /* Transform CR and/or LF into '\0' */ |
cbc63a09 | 371 | while (s-- > ff_xb.buf) { |
20caffd2 WD |
372 | if (*s == '\n' || *s == '\r') |
373 | *s = '\0'; | |
374 | } | |
375 | } | |
cbc63a09 | 376 | |
20caffd2 | 377 | if (ff_lastchar) |
cbc63a09 | 378 | ff_xb.pos = 0; |
20caffd2 | 379 | else { |
cbc63a09 | 380 | char *s = ff_xb.buf; |
20caffd2 WD |
381 | /* Last buf ended with a '\0', so don't let this buf start with one. */ |
382 | while (len && *s == '\0') | |
383 | s++, len--; | |
cbc63a09 | 384 | ff_xb.pos = s - ff_xb.buf; |
20caffd2 | 385 | } |
cbc63a09 WD |
386 | |
387 | #ifdef ICONV_OPTION | |
388 | if (filesfrom_convert && len) { | |
389 | char *sob = ff_xb.buf + ff_xb.pos, *s = sob; | |
390 | char *eob = sob + len; | |
391 | int flags = ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE | ICB_CIRCULAR_OUT; | |
392 | if (ff_lastchar == '\0') | |
393 | flags |= ICB_INIT; | |
394 | /* Convert/send each null-terminated string separately, skipping empties. */ | |
395 | while (s != eob) { | |
396 | if (*s++ == '\0') { | |
397 | ff_xb.len = s - sob - 1; | |
398 | if (iconvbufs(ic_send, &ff_xb, &iobuf.out, flags) < 0) | |
399 | exit_cleanup(RERR_PROTOCOL); /* impossible? */ | |
400 | write_buf(iobuf.out_fd, s-1, 1); /* Send the '\0'. */ | |
401 | while (s != eob && *s == '\0') | |
402 | s++; | |
403 | sob = s; | |
404 | ff_xb.pos = sob - ff_xb.buf; | |
405 | flags |= ICB_INIT; | |
406 | } | |
407 | } | |
408 | ||
409 | if ((ff_xb.len = s - sob) == 0) | |
410 | ff_lastchar = '\0'; | |
411 | else { | |
412 | /* Handle a partial string specially, saving any incomplete chars. */ | |
413 | flags &= ~ICB_INCLUDE_INCOMPLETE; | |
414 | if (iconvbufs(ic_send, &ff_xb, &iobuf.out, flags) < 0) { | |
415 | if (errno == E2BIG) | |
416 | exit_cleanup(RERR_PROTOCOL); /* impossible? */ | |
417 | if (ff_xb.pos) | |
418 | memmove(ff_xb.buf, ff_xb.buf + ff_xb.pos, ff_xb.len); | |
419 | } | |
420 | ff_lastchar = 'x'; /* Anything non-zero. */ | |
421 | } | |
422 | } else | |
423 | #endif | |
424 | ||
20caffd2 | 425 | if (len) { |
cbc63a09 WD |
426 | char *f = ff_xb.buf + ff_xb.pos; |
427 | char *t = ff_xb.buf; | |
20caffd2 WD |
428 | char *eob = f + len; |
429 | /* Eliminate any multi-'\0' runs. */ | |
430 | while (f != eob) { | |
431 | if (!(*t++ = *f++)) { | |
cbc63a09 WD |
432 | while (f != eob && *f == '\0') |
433 | f++; | |
20caffd2 WD |
434 | } |
435 | } | |
436 | ff_lastchar = f[-1]; | |
cbc63a09 WD |
437 | if ((len = t - ff_xb.buf) != 0) { |
438 | /* This will not circle back to perform_io() because we only get | |
439 | * called when there is plenty of room in the output buffer. */ | |
440 | write_buf(iobuf.out_fd, ff_xb.buf, len); | |
441 | } | |
20caffd2 | 442 | } |
56014c8c | 443 | } |
720b47f2 | 444 | |
20caffd2 WD |
445 | /* Perform buffered input and output until specified conditions are met. When |
446 | * given a "needed" read requirement, we'll return without doing any I/O if the | |
447 | * iobuf.in bytes are already available. When reading, we'll read as many | |
448 | * bytes as we can into the buffer, and return as soon as we meet the minimum | |
449 | * read requirement. When given a "needed" write requirement, we'll return | |
450 | * without doing any I/O if that many bytes will fit in the output buffer (we | |
451 | * check either iobuf.out or iobuf.msg, depending on the flags). When writing, | |
452 | * we write out as much as we can, and return as soon as the given free-space | |
453 | * requirement is available. | |
880da007 | 454 | * |
20caffd2 WD |
455 | * The iobuf.out and iobuf.msg buffers are circular, so some writes into them |
456 | * will need to be split when the data needs to wrap around to the start. In | |
457 | * order to help make this easier for some operations (such as the use of | |
458 | * SIVAL() into the buffer) the buffers MUST have 4 bytes of overflow space at | |
459 | * the end that is not not counted in the "size". The iobuf.in buffer is not | |
460 | * (currently) circular. To facilitate the handling of MSG_DATA bytes as they | |
461 | * are read-from/written-into the buffers, see the three raw_* iobuf vars. | |
cb2e1f18 | 462 | * |
20caffd2 WD |
463 | * When writing, we flush data in the following priority order: |
464 | * | |
465 | * 1. Finish writing any in-progress MSG_DATA sequence from iobuf.out. | |
466 | * | |
467 | * 2. Write out all the messages from the message buf (if iobuf.msg is active). | |
468 | * Yes, this means that a PIO_NEED_OUTROOM call will completely flush any | |
469 | * messages before getting to the iobuf.out flushing (except for rule 1). | |
470 | * | |
471 | * 3. Write out the raw data from iobuf.out, possibly filling in the multiplexed | |
472 | * MSG_DATA header that was pre-allocated (when output is multiplexed). | |
473 | * | |
474 | * TODO: items for possible future work: | |
475 | * | |
476 | * - Make this routine able to read the generator-to-receiver batch flow? | |
477 | * | |
478 | * - Make the input buffer circular? | |
479 | * | |
480 | * Unlike the old routines that this replaces, it is OK to read ahead as far as | |
481 | * we can because the read_a_msg() routine now reads its bytes out of the input | |
482 | * buffer. In the old days, only raw data was in the input buffer, and any | |
483 | * unused raw data in the buf would prevent the reading of socket data. */ | |
484 | static char *perform_io(size_t needed, int flags) | |
7a55d06e | 485 | { |
20caffd2 WD |
486 | fd_set r_fds, e_fds, w_fds; |
487 | struct timeval tv; | |
488 | int cnt, max_fd; | |
489 | size_t empty_buf_len = 0; | |
490 | xbuf *out; | |
491 | char *data; | |
492 | ||
493 | if (iobuf.in.len == 0 && iobuf.in.pos != 0) { | |
494 | if (iobuf.raw_input_ends_before) | |
495 | iobuf.raw_input_ends_before -= iobuf.in.pos; | |
496 | iobuf.in.pos = 0; | |
574c2500 | 497 | } |
3151cbae | 498 | |
20caffd2 WD |
499 | switch (flags & PIO_NEED_FLAGS) { |
500 | case PIO_NEED_INPUT: | |
501 | if (DEBUG_GTE(IO, 3)) { | |
502 | rprintf(FINFO, "[%s] perform_io(%ld, %sinput)\n", | |
503 | who_am_i(), (long)needed, flags & PIO_CONSUME_INPUT ? "consume&" : ""); | |
504 | } | |
00bdf899 | 505 | |
20caffd2 WD |
506 | /* Make sure the input buffer is big enough to hold "needed" bytes. |
507 | * Also make sure it will fit in the free space at the end, or | |
508 | * else we need to shift some bytes. */ | |
509 | if (needed && iobuf.in.size < needed) { | |
510 | if (!(iobuf.in.buf = realloc_array(iobuf.in.buf, char, needed))) | |
511 | out_of_memory("perform_io"); | |
512 | if (DEBUG_GTE(IO, 4)) { | |
0a56ef12 WD |
513 | rprintf(FINFO, "[%s] resized input buffer from %ld to %ld bytes.\n", |
514 | who_am_i(), (long)iobuf.in.size, (long)needed); | |
20caffd2 WD |
515 | } |
516 | iobuf.in.size = needed; | |
517 | } | |
518 | if (iobuf.in.size - iobuf.in.pos < needed | |
519 | || (iobuf.in.len < needed && iobuf.in.len < 1024 | |
520 | && iobuf.in.size - (iobuf.in.pos + iobuf.in.len) < 1024)) { | |
521 | memmove(iobuf.in.buf, iobuf.in.buf + iobuf.in.pos, iobuf.in.len); | |
522 | if (DEBUG_GTE(IO, 4)) { | |
523 | rprintf(FINFO, | |
0a56ef12 WD |
524 | "[%s] moved %ld bytes from %ld to 0 in the input buffer (size=%ld, needed=%ld).\n", |
525 | who_am_i(), (long)iobuf.in.len, (long)iobuf.in.pos, (long)iobuf.in.size, (long)needed); | |
20caffd2 WD |
526 | } |
527 | if (iobuf.raw_input_ends_before) | |
528 | iobuf.raw_input_ends_before -= iobuf.in.pos; | |
529 | iobuf.in.pos = 0; | |
530 | } | |
531 | break; | |
720b47f2 | 532 | |
20caffd2 WD |
533 | case PIO_NEED_OUTROOM: |
534 | /* We never resize the circular output buffer. */ | |
535 | if (iobuf.out.size - iobuf.out_empty_len < needed) { | |
536 | fprintf(stderr, "need to write %ld bytes, iobuf.out.buf is only %ld bytes.\n", | |
537 | (long)needed, (long)(iobuf.out.size - iobuf.out_empty_len)); | |
538 | exit_cleanup(RERR_PROTOCOL); | |
539 | } | |
4c36ddbe | 540 | |
20caffd2 WD |
541 | if (DEBUG_GTE(IO, 3)) { |
542 | rprintf(FINFO, "[%s] perform_io(%ld, outroom) needs to flush %ld\n", | |
543 | who_am_i(), (long)needed, | |
544 | iobuf.out.len > iobuf.out.size - needed | |
545 | ? (long)iobuf.out.len - (iobuf.out.size - needed) : 0L); | |
546 | } | |
547 | break; | |
ea2111d1 | 548 | |
20caffd2 WD |
549 | case PIO_NEED_MSGROOM: |
550 | /* We never resize the circular message buffer. */ | |
551 | if (iobuf.msg.size < needed) { | |
552 | fprintf(stderr, "need to write %ld bytes, iobuf.msg.buf is only %ld bytes.\n", | |
553 | (long)needed, (long)iobuf.msg.size); | |
554 | exit_cleanup(RERR_PROTOCOL); | |
555 | } | |
556 | ||
557 | if (DEBUG_GTE(IO, 3)) { | |
558 | rprintf(FINFO, "[%s] perform_io(%ld, msgroom) needs to flush %ld\n", | |
559 | who_am_i(), (long)needed, | |
560 | iobuf.out.len > iobuf.msg.size - needed | |
561 | ? (long)iobuf.out.len - (iobuf.msg.size - needed) : 0L); | |
562 | } | |
563 | break; | |
564 | ||
565 | case 0: | |
566 | if (DEBUG_GTE(IO, 3)) | |
567 | rprintf(FINFO, "[%s] perform_io(%ld, %d)\n", who_am_i(), (long)needed, flags); | |
568 | break; | |
569 | ||
570 | default: | |
571 | exit_cleanup(RERR_UNSUPPORTED); | |
572 | } | |
573 | ||
574 | while (1) { | |
575 | switch (flags & PIO_NEED_FLAGS) { | |
576 | case PIO_NEED_INPUT: | |
577 | if (iobuf.in.len >= needed) | |
578 | goto double_break; | |
579 | break; | |
580 | case PIO_NEED_OUTROOM: | |
581 | if (iobuf.out.len <= iobuf.out.size - needed) | |
582 | goto double_break; | |
583 | break; | |
584 | case PIO_NEED_MSGROOM: | |
585 | if (iobuf.msg.len <= iobuf.msg.size - needed) | |
586 | goto double_break; | |
587 | break; | |
588 | } | |
589 | ||
590 | max_fd = -1; | |
4c36ddbe | 591 | |
56014c8c | 592 | FD_ZERO(&r_fds); |
20caffd2 WD |
593 | FD_ZERO(&e_fds); |
594 | if (iobuf.in_fd >= 0 && iobuf.in.size - (iobuf.in.pos + iobuf.in.len)) { | |
595 | if (!read_batch || batch_fd >= 0) { | |
596 | FD_SET(iobuf.in_fd, &r_fds); | |
597 | FD_SET(iobuf.in_fd, &e_fds); | |
598 | } | |
599 | if (iobuf.in_fd > max_fd) | |
600 | max_fd = iobuf.in_fd; | |
601 | } | |
602 | ||
603 | /* Only do more filesfrom processing if there is enough room in the out buffer. */ | |
604 | if (ff_forward_fd >= 0 && iobuf.out.size - iobuf.out.len > FILESFROM_BUFLEN*2) { | |
605 | FD_SET(ff_forward_fd, &r_fds); | |
606 | if (ff_forward_fd > max_fd) | |
607 | max_fd = ff_forward_fd; | |
608 | } | |
609 | ||
a7026ba9 | 610 | FD_ZERO(&w_fds); |
20caffd2 WD |
611 | if (iobuf.out_fd >= 0) { |
612 | if (iobuf.raw_flushing_ends_before | |
613 | || (!iobuf.msg.len && iobuf.out.len > iobuf.out_empty_len && !(flags & PIO_NEED_MSGROOM))) { | |
614 | if (OUT_MULTIPLEXED && !iobuf.raw_flushing_ends_before) { | |
615 | size_t val; | |
616 | ||
617 | /* The iobuf.raw_flushing_ends_before value can point off the end | |
618 | * of the iobuf.out buffer for a while, for easier subtracting. */ | |
619 | iobuf.raw_flushing_ends_before = iobuf.out.pos + iobuf.out.len; | |
620 | ||
621 | SIVAL(iobuf.out.buf + iobuf.raw_data_header_pos, 0, | |
622 | ((MPLEX_BASE + (int)MSG_DATA)<<24) + iobuf.out.len - 4); | |
623 | if ((val = iobuf.out.size - iobuf.raw_data_header_pos) < 4) { | |
624 | /* We used some of the overflow bytes, so move them. */ | |
625 | if (DEBUG_GTE(IO, 4)) { | |
626 | rprintf(FINFO, "[%s] wrap-bytes moved: %d (perform_io)\n", | |
627 | who_am_i(), (int)val); | |
628 | } | |
629 | memcpy(iobuf.out.buf, iobuf.out.buf + iobuf.out.size, 4 - val); | |
630 | } | |
631 | ||
632 | if (DEBUG_GTE(IO, 1)) { | |
633 | rprintf(FINFO, "[%s] send_msg(%d, %ld)\n", | |
634 | who_am_i(), (int)MSG_DATA, (long)iobuf.out.len - 4); | |
635 | } | |
636 | ||
637 | /* reserve room for the next MSG_DATA header */ | |
638 | iobuf.raw_data_header_pos = iobuf.raw_flushing_ends_before; | |
639 | if (iobuf.raw_data_header_pos >= iobuf.out.size) | |
640 | iobuf.raw_data_header_pos -= iobuf.out.size; | |
75ea8459 | 641 | /* Yes, it is possible for this to make len > size for a while. */ |
20caffd2 | 642 | iobuf.out.len += 4; |
56014c8c | 643 | } |
20caffd2 WD |
644 | |
645 | empty_buf_len = iobuf.out_empty_len; | |
646 | out = &iobuf.out; | |
647 | } else if (iobuf.msg.len) { | |
648 | empty_buf_len = 0; | |
649 | out = &iobuf.msg; | |
650 | } else | |
651 | out = NULL; | |
652 | if (out) { | |
653 | FD_SET(iobuf.out_fd, &w_fds); | |
654 | if (iobuf.out_fd > max_fd) | |
655 | max_fd = iobuf.out_fd; | |
656 | } | |
657 | } else | |
658 | out = NULL; | |
659 | ||
660 | if (max_fd < 0) { | |
661 | switch (flags & PIO_NEED_FLAGS) { | |
662 | case PIO_NEED_INPUT: | |
663 | rprintf(FERROR, "error in perform_io: no fd for input.\n"); | |
664 | exit_cleanup(RERR_PROTOCOL); | |
665 | case PIO_NEED_OUTROOM: | |
666 | case PIO_NEED_MSGROOM: | |
667 | msgs2stderr = 1; | |
668 | rprintf(FERROR, "error in perform_io: no fd for output.\n"); | |
669 | exit_cleanup(RERR_PROTOCOL); | |
670 | default: | |
671 | /* No stated needs, so I guess this is OK. */ | |
672 | break; | |
56014c8c | 673 | } |
20caffd2 | 674 | break; |
554e0a8d AT |
675 | } |
676 | ||
20caffd2 | 677 | if (extra_flist_sending_enabled) { |
7a7810aa WD |
678 | if (file_total - file_old_total < MAX_FILECNT_LOOKAHEAD |
679 | && file_total - file_old_total >= MIN_FILECNT_LOOKAHEAD) | |
680 | tv.tv_sec = 0; | |
681 | else { | |
682 | extra_flist_sending_enabled = False; | |
683 | tv.tv_sec = select_timeout; | |
684 | } | |
685 | } else | |
ce827c3e | 686 | tv.tv_sec = select_timeout; |
4c36ddbe AT |
687 | tv.tv_usec = 0; |
688 | ||
20caffd2 | 689 | cnt = select(max_fd + 1, &r_fds, &w_fds, &e_fds, &tv); |
554e0a8d | 690 | |
20caffd2 WD |
691 | if (cnt <= 0) { |
692 | if (cnt < 0 && errno == EBADF) { | |
693 | msgs2stderr = 1; | |
554e0a8d | 694 | exit_cleanup(RERR_SOCKETIO); |
2a5df862 | 695 | } |
20caffd2 | 696 | if (extra_flist_sending_enabled) { |
7a7810aa | 697 | extra_flist_sending_enabled = False; |
ce827c3e | 698 | send_extra_file_list(sock_f_out, -1); |
7a7810aa WD |
699 | extra_flist_sending_enabled = !flist_eof; |
700 | } else | |
ce827c3e | 701 | check_timeout(); |
20caffd2 WD |
702 | FD_ZERO(&r_fds); /* Just in case... */ |
703 | FD_ZERO(&w_fds); | |
4c36ddbe AT |
704 | } |
705 | ||
20caffd2 WD |
706 | if (iobuf.in_fd >= 0 && FD_ISSET(iobuf.in_fd, &r_fds)) { |
707 | size_t pos = iobuf.in.pos + iobuf.in.len; | |
708 | size_t len = iobuf.in.size - pos; | |
709 | int n; | |
710 | if ((n = read(iobuf.in_fd, iobuf.in.buf + pos, len)) <= 0) { | |
711 | if (n == 0) { | |
712 | if (!read_batch || batch_fd < 0 || am_generator) | |
713 | whine_about_eof(iobuf.in_fd); /* Doesn't return. */ | |
714 | batch_fd = -1; | |
715 | continue; | |
716 | } | |
717 | if (errno == EINTR || errno == EWOULDBLOCK || errno == EAGAIN) | |
718 | n = 0; | |
719 | else { | |
720 | /* Don't write errors on a dead socket. */ | |
721 | if (iobuf.in_fd == sock_f_in) { | |
722 | if (am_sender) | |
723 | msgs2stderr = 1; | |
724 | rsyserr(FERROR_SOCKET, errno, "read error"); | |
725 | } else | |
726 | rsyserr(FERROR, errno, "read error"); | |
727 | exit_cleanup(RERR_STREAMIO); | |
56014c8c | 728 | } |
20caffd2 WD |
729 | } |
730 | if (msgs2stderr && DEBUG_GTE(IO, 2)) | |
731 | rprintf(FINFO, "[%s] recv=%ld\n", who_am_i(), (long)n); | |
732 | ||
733 | if (io_timeout) | |
734 | last_io_in = time(NULL); | |
735 | stats.total_read += n; | |
736 | ||
737 | iobuf.in.len += n; | |
738 | } | |
739 | ||
740 | if (iobuf.out_fd >= 0 && FD_ISSET(iobuf.out_fd, &w_fds)) { | |
741 | size_t len = iobuf.raw_flushing_ends_before ? iobuf.raw_flushing_ends_before - out->pos : out->len; | |
742 | int n; | |
743 | ||
744 | if (bwlimit_writemax && len > bwlimit_writemax) | |
745 | len = bwlimit_writemax; | |
746 | ||
747 | if (out->pos + len > out->size) | |
748 | len = out->size - out->pos; | |
749 | if ((n = write(iobuf.out_fd, out->buf + out->pos, len)) <= 0) { | |
750 | if (errno == EINTR || errno == EWOULDBLOCK || errno == EAGAIN) | |
751 | n = 0; | |
752 | else { | |
753 | /* Don't write errors on a dead socket. */ | |
754 | msgs2stderr = 1; | |
755 | out->len = iobuf.raw_flushing_ends_before = out->pos = 0; | |
f9185203 | 756 | rsyserr(FERROR_SOCKET, errno, "[%s] write error", who_am_i()); |
20caffd2 WD |
757 | exit_cleanup(RERR_STREAMIO); |
758 | } | |
759 | } | |
760 | if (msgs2stderr && DEBUG_GTE(IO, 2)) { | |
761 | rprintf(FINFO, "[%s] %s sent=%ld\n", | |
762 | who_am_i(), out == &iobuf.out ? "out" : "msg", (long)n); | |
763 | } | |
764 | ||
765 | if (io_timeout) | |
766 | last_io_out = time(NULL); | |
767 | stats.total_written += n; | |
768 | ||
769 | if (bwlimit_writemax) | |
770 | sleep_for_bwlimit(n); | |
771 | ||
772 | if ((out->pos += n) == out->size) { | |
773 | if (iobuf.raw_flushing_ends_before) | |
774 | iobuf.raw_flushing_ends_before -= out->size; | |
775 | out->pos = 0; | |
776 | } | |
777 | if (out->pos == iobuf.raw_flushing_ends_before) | |
778 | iobuf.raw_flushing_ends_before = 0; | |
779 | if ((out->len -= n) == empty_buf_len) { | |
780 | out->pos = 0; | |
781 | if (empty_buf_len) | |
782 | iobuf.raw_data_header_pos = 0; | |
783 | } | |
784 | } | |
785 | ||
786 | if (ff_forward_fd >= 0 && FD_ISSET(ff_forward_fd, &r_fds)) { | |
787 | /* This can potentially flush all output and enable | |
788 | * multiplexed output, so keep this last in the loop | |
789 | * and be sure to not cache anything that would break | |
790 | * such a change. */ | |
791 | forward_filesfrom_data(); | |
792 | } | |
793 | } | |
794 | double_break: | |
795 | ||
796 | data = iobuf.in.buf + iobuf.in.pos; | |
797 | ||
798 | if (flags & PIO_CONSUME_INPUT) { | |
799 | iobuf.in.len -= needed; | |
800 | iobuf.in.pos += needed; | |
801 | } | |
802 | ||
803 | return data; | |
804 | } | |
805 | ||
f9185203 WD |
806 | void noop_io_until_death(void) |
807 | { | |
808 | char buf[1024]; | |
809 | ||
810 | kluge_around_eof = 1; | |
304d7b58 | 811 | set_io_timeout(protocol_version >= 31 ? 10 : 1); |
f9185203 WD |
812 | |
813 | while (1) | |
814 | read_buf(iobuf.in_fd, buf, sizeof buf); | |
815 | } | |
816 | ||
20caffd2 WD |
817 | /* Buffer a message for the multiplexed output stream. Is never used for MSG_DATA. */ |
818 | int send_msg(enum msgcode code, const char *buf, size_t len, int convert) | |
819 | { | |
820 | char *hdr; | |
821 | size_t pos; | |
822 | BOOL want_debug = DEBUG_GTE(IO, 1) && convert >= 0 && (msgs2stderr || code != MSG_INFO); | |
823 | ||
824 | if (!OUT_MULTIPLEXED) | |
825 | return 0; | |
826 | ||
827 | if (want_debug) | |
828 | rprintf(FINFO, "[%s] send_msg(%d, %ld)\n", who_am_i(), (int)code, (long)len); | |
829 | ||
22955408 | 830 | #ifdef ICONV_OPTION |
20caffd2 WD |
831 | if (convert > 0 && ic_send == (iconv_t)-1) |
832 | convert = 0; | |
833 | if (convert > 0) { | |
834 | /* Ensuring double-size room leaves space for a potential conversion. */ | |
835 | if (iobuf.msg.len + len*2 + 4 > iobuf.msg.size) | |
836 | perform_io(len*2 + 4, PIO_NEED_MSGROOM); | |
837 | } else | |
22955408 | 838 | #endif |
20caffd2 WD |
839 | if (iobuf.msg.len + len + 4 > iobuf.msg.size) |
840 | perform_io(len + 4, PIO_NEED_MSGROOM); | |
841 | ||
842 | pos = iobuf.msg.pos + iobuf.msg.len; /* Must be set after any flushing. */ | |
843 | if (pos >= iobuf.msg.size) | |
844 | pos -= iobuf.msg.size; | |
845 | hdr = iobuf.msg.buf + pos; | |
846 | ||
847 | iobuf.msg.len += 4; /* Leave room for the coming header bytes. */ | |
848 | ||
22955408 | 849 | #ifdef ICONV_OPTION |
20caffd2 WD |
850 | if (convert > 0) { |
851 | xbuf inbuf; | |
852 | ||
853 | INIT_XBUF(inbuf, (char*)buf, len, (size_t)-1); | |
854 | ||
855 | len = iobuf.msg.len; | |
856 | iconvbufs(ic_send, &inbuf, &iobuf.msg, | |
d8a7290f | 857 | ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE | ICB_CIRCULAR_OUT | ICB_INIT); |
20caffd2 WD |
858 | if (inbuf.len > 0) { |
859 | rprintf(FERROR, "overflowed iobuf.msg buffer in send_msg"); | |
860 | exit_cleanup(RERR_UNSUPPORTED); | |
861 | } | |
862 | len = iobuf.msg.len - len; | |
863 | } else | |
22955408 | 864 | #endif |
20caffd2 WD |
865 | { |
866 | size_t siz; | |
867 | ||
868 | if ((pos += 4) >= iobuf.msg.size) | |
869 | pos -= iobuf.msg.size; | |
870 | ||
871 | /* Handle a split copy if we wrap around the end of the circular buffer. */ | |
872 | if (pos >= iobuf.msg.pos && (siz = iobuf.msg.size - pos) < len) { | |
873 | memcpy(iobuf.msg.buf + pos, buf, siz); | |
874 | memcpy(iobuf.msg.buf, buf + siz, len - siz); | |
875 | } else | |
876 | memcpy(iobuf.msg.buf + pos, buf, len); | |
877 | ||
878 | iobuf.msg.len += len; | |
879 | } | |
880 | ||
881 | SIVAL(hdr, 0, ((MPLEX_BASE + (int)code)<<24) + len); | |
882 | /* If the header used any overflow bytes, move them to the start. */ | |
883 | if ((pos = hdr+4 - iobuf.msg.buf) > iobuf.msg.size) { | |
884 | size_t siz = pos - iobuf.msg.size; | |
885 | if (DEBUG_GTE(IO, 4)) | |
886 | rprintf(FINFO, "[%s] wrap-bytes moved: %d (send_msg)\n", who_am_i(), (int)siz); | |
887 | memcpy(iobuf.msg.buf, hdr+4 - siz, siz); | |
888 | } | |
889 | ||
890 | if (want_debug && convert > 0) | |
891 | rprintf(FINFO, "[%s] converted msg len=%ld\n", who_am_i(), (long)len); | |
892 | ||
893 | return 1; | |
894 | } | |
895 | ||
896 | void send_msg_int(enum msgcode code, int num) | |
897 | { | |
898 | char numbuf[4]; | |
899 | ||
900 | if (DEBUG_GTE(IO, 1)) | |
901 | rprintf(FINFO, "[%s] send_msg_int(%d, %d)\n", who_am_i(), (int)code, num); | |
902 | ||
903 | SIVAL(numbuf, 0, num); | |
904 | send_msg(code, numbuf, 4, -1); | |
905 | } | |
906 | ||
907 | static void got_flist_entry_status(enum festatus status, int ndx) | |
908 | { | |
909 | struct file_list *flist = flist_for_ndx(ndx, "got_flist_entry_status"); | |
910 | ||
911 | if (remove_source_files) { | |
912 | active_filecnt--; | |
913 | active_bytecnt -= F_LENGTH(flist->files[ndx - flist->ndx_start]); | |
914 | } | |
915 | ||
916 | if (inc_recurse) | |
917 | flist->in_progress--; | |
918 | ||
919 | switch (status) { | |
920 | case FES_SUCCESS: | |
921 | if (remove_source_files) | |
922 | send_msg_int(MSG_SUCCESS, ndx); | |
923 | if (preserve_hard_links) { | |
924 | struct file_struct *file = flist->files[ndx - flist->ndx_start]; | |
925 | if (F_IS_HLINKED(file)) { | |
926 | flist_ndx_push(&hlink_list, ndx); | |
927 | flist->in_progress++; | |
56014c8c WD |
928 | } |
929 | } | |
20caffd2 WD |
930 | break; |
931 | case FES_REDO: | |
932 | if (read_batch) { | |
933 | if (inc_recurse) | |
934 | flist->in_progress++; | |
935 | break; | |
936 | } | |
937 | if (inc_recurse) | |
938 | flist->to_redo++; | |
939 | flist_ndx_push(&redo_list, ndx); | |
940 | break; | |
941 | case FES_NO_SEND: | |
942 | break; | |
943 | } | |
944 | } | |
945 | ||
946 | /* Note the fds used for the main socket (which might really be a pipe | |
947 | * for a local transfer, but we can ignore that). */ | |
948 | void io_set_sock_fds(int f_in, int f_out) | |
949 | { | |
950 | sock_f_in = f_in; | |
951 | sock_f_out = f_out; | |
952 | } | |
953 | ||
954 | void set_io_timeout(int secs) | |
955 | { | |
956 | io_timeout = secs; | |
957 | ||
958 | if (!io_timeout || io_timeout > SELECT_TIMEOUT) | |
959 | select_timeout = SELECT_TIMEOUT; | |
960 | else | |
961 | select_timeout = io_timeout; | |
962 | ||
963 | allowed_lull = read_batch ? 0 : (io_timeout + 1) / 2; | |
964 | } | |
965 | ||
966 | static void check_for_d_option_error(const char *msg) | |
967 | { | |
968 | static char rsync263_opts[] = "BCDHIKLPRSTWabceghlnopqrtuvxz"; | |
969 | char *colon; | |
970 | int saw_d = 0; | |
971 | ||
972 | if (*msg != 'r' | |
973 | || strncmp(msg, REMOTE_OPTION_ERROR, sizeof REMOTE_OPTION_ERROR - 1) != 0) | |
974 | return; | |
56014c8c | 975 | |
20caffd2 WD |
976 | msg += sizeof REMOTE_OPTION_ERROR - 1; |
977 | if (*msg == '-' || (colon = strchr(msg, ':')) == NULL | |
978 | || strncmp(colon, REMOTE_OPTION_ERROR2, sizeof REMOTE_OPTION_ERROR2 - 1) != 0) | |
979 | return; | |
554e0a8d | 980 | |
20caffd2 WD |
981 | for ( ; *msg != ':'; msg++) { |
982 | if (*msg == 'd') | |
983 | saw_d = 1; | |
984 | else if (*msg == 'e') | |
985 | break; | |
986 | else if (strchr(rsync263_opts, *msg) == NULL) | |
987 | return; | |
988 | } | |
4c36ddbe | 989 | |
20caffd2 WD |
990 | if (saw_d) { |
991 | rprintf(FWARNING, | |
992 | "*** Try using \"--old-d\" if remote rsync is <= 2.6.3 ***\n"); | |
993 | } | |
994 | } | |
1f75bb10 | 995 | |
20caffd2 WD |
996 | /* This is used by the generator to limit how many file transfers can |
997 | * be active at once when --remove-source-files is specified. Without | |
998 | * this, sender-side deletions were mostly happening at the end. */ | |
999 | void increment_active_files(int ndx, int itemizing, enum logcode code) | |
1000 | { | |
1001 | while (1) { | |
1002 | /* TODO: tune these limits? */ | |
1003 | int limit = active_bytecnt >= 128*1024 ? 10 : 50; | |
1004 | if (active_filecnt < limit) | |
1005 | break; | |
1006 | check_for_finished_files(itemizing, code, 0); | |
1007 | if (active_filecnt < limit) | |
1008 | break; | |
1009 | wait_for_receiver(); | |
1010 | } | |
00bdf899 | 1011 | |
20caffd2 WD |
1012 | active_filecnt++; |
1013 | active_bytecnt += F_LENGTH(cur_flist->files[ndx - cur_flist->ndx_start]); | |
1014 | } | |
1f75bb10 | 1015 | |
20caffd2 WD |
1016 | int get_redo_num(void) |
1017 | { | |
1018 | return flist_ndx_pop(&redo_list); | |
1019 | } | |
1020 | ||
1021 | int get_hlink_num(void) | |
1022 | { | |
1023 | return flist_ndx_pop(&hlink_list); | |
1024 | } | |
8d9dc9f9 | 1025 | |
20caffd2 WD |
1026 | /* When we're the receiver and we have a local --files-from list of names |
1027 | * that needs to be sent over the socket to the sender, we have to do two | |
1028 | * things at the same time: send the sender a list of what files we're | |
1029 | * processing and read the incoming file+info list from the sender. We do | |
1030 | * this by making recv_file_list() call forward_filesfrom_data(), which | |
1031 | * will ensure that we forward data to the sender until we get some data | |
1032 | * for recv_file_list() to use. */ | |
1033 | void start_filesfrom_forwarding(int fd) | |
1034 | { | |
8e6b4ddb WD |
1035 | if (protocol_version < 31 && OUT_MULTIPLEXED) { |
1036 | /* Older protocols send the files-from data w/o packaging | |
1037 | * it in multiplexed I/O packets, so temporarily switch | |
705132bc WD |
1038 | * to buffered I/O to match this behavior. */ |
1039 | iobuf.msg.pos = iobuf.msg.len = 0; /* Be extra sure no messages go out. */ | |
8e6b4ddb | 1040 | ff_reenable_multiplex = io_end_multiplex_out(MPLX_TO_BUFFERED); |
20caffd2 | 1041 | } |
705132bc | 1042 | ff_forward_fd = fd; |
cbc63a09 WD |
1043 | |
1044 | alloc_xbuf(&ff_xb, FILESFROM_BUFLEN); | |
4c36ddbe | 1045 | } |
8d9dc9f9 | 1046 | |
67b8f3df | 1047 | /* Read a line into the "buf" buffer. */ |
ba525f77 | 1048 | int read_line(int fd, char *buf, size_t bufsiz, int flags) |
56014c8c | 1049 | { |
ba525f77 | 1050 | char ch, *s, *eob; |
56014c8c | 1051 | |
ba525f77 WD |
1052 | #ifdef ICONV_OPTION |
1053 | if (flags & RL_CONVERT && iconv_buf.size < bufsiz) | |
1054 | realloc_xbuf(&iconv_buf, bufsiz + 1024); | |
1055 | #endif | |
1056 | ||
56014c8c | 1057 | start: |
22955408 | 1058 | #ifdef ICONV_OPTION |
ba525f77 | 1059 | s = flags & RL_CONVERT ? iconv_buf.buf : buf; |
22955408 WD |
1060 | #else |
1061 | s = buf; | |
1062 | #endif | |
ba525f77 | 1063 | eob = s + bufsiz - 1; |
56014c8c | 1064 | while (1) { |
20caffd2 WD |
1065 | /* We avoid read_byte() for files because files can return an EOF. */ |
1066 | if (fd == iobuf.in_fd) | |
1067 | ch = read_byte(fd); | |
1068 | else if (safe_read(fd, &ch, 1) == 0) | |
56014c8c | 1069 | break; |
ba525f77 | 1070 | if (flags & RL_EOL_NULLS ? ch == '\0' : (ch == '\r' || ch == '\n')) { |
67b8f3df | 1071 | /* Skip empty lines if dumping comments. */ |
ba525f77 | 1072 | if (flags & RL_DUMP_COMMENTS && s == buf) |
56014c8c WD |
1073 | continue; |
1074 | break; | |
1075 | } | |
1076 | if (s < eob) | |
1077 | *s++ = ch; | |
1078 | } | |
1079 | *s = '\0'; | |
7a55d06e | 1080 | |
ba525f77 | 1081 | if (flags & RL_DUMP_COMMENTS && (*buf == '#' || *buf == ';')) |
56014c8c WD |
1082 | goto start; |
1083 | ||
ba525f77 WD |
1084 | #ifdef ICONV_OPTION |
1085 | if (flags & RL_CONVERT) { | |
1086 | xbuf outbuf; | |
1087 | INIT_XBUF(outbuf, buf, 0, bufsiz); | |
1088 | iconv_buf.pos = 0; | |
1089 | iconv_buf.len = s - iconv_buf.buf; | |
1090 | iconvbufs(ic_recv, &iconv_buf, &outbuf, | |
d8a7290f | 1091 | ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE | ICB_INIT); |
ba525f77 WD |
1092 | outbuf.buf[outbuf.len] = '\0'; |
1093 | return outbuf.len; | |
1094 | } | |
1095 | #endif | |
1096 | ||
67b8f3df WD |
1097 | return s - buf; |
1098 | } | |
1099 | ||
53936ef9 WD |
1100 | void read_args(int f_in, char *mod_name, char *buf, size_t bufsiz, int rl_nulls, |
1101 | char ***argv_p, int *argc_p, char **request_p) | |
67b8f3df WD |
1102 | { |
1103 | int maxargs = MAX_ARGS; | |
1104 | int dot_pos = 0; | |
1105 | int argc = 0; | |
1106 | char **argv, *p; | |
22955408 WD |
1107 | int rl_flags = (rl_nulls ? RL_EOL_NULLS : 0); |
1108 | ||
1109 | #ifdef ICONV_OPTION | |
1110 | rl_flags |= (protect_args && ic_recv != (iconv_t)-1 ? RL_CONVERT : 0); | |
1111 | #endif | |
67b8f3df WD |
1112 | |
1113 | if (!(argv = new_array(char *, maxargs))) | |
1114 | out_of_memory("read_args"); | |
53936ef9 | 1115 | if (mod_name && !protect_args) |
67b8f3df WD |
1116 | argv[argc++] = "rsyncd"; |
1117 | ||
1118 | while (1) { | |
ba525f77 | 1119 | if (read_line(f_in, buf, bufsiz, rl_flags) == 0) |
67b8f3df WD |
1120 | break; |
1121 | ||
53936ef9 | 1122 | if (argc == maxargs-1) { |
67b8f3df WD |
1123 | maxargs += MAX_ARGS; |
1124 | if (!(argv = realloc_array(argv, char *, maxargs))) | |
1125 | out_of_memory("read_args"); | |
1126 | } | |
1127 | ||
1128 | if (dot_pos) { | |
1129 | if (request_p) { | |
1130 | *request_p = strdup(buf); | |
1131 | request_p = NULL; | |
1132 | } | |
1133 | if (mod_name) | |
1134 | glob_expand_module(mod_name, buf, &argv, &argc, &maxargs); | |
1135 | else | |
1136 | glob_expand(buf, &argv, &argc, &maxargs); | |
1137 | } else { | |
1138 | if (!(p = strdup(buf))) | |
1139 | out_of_memory("read_args"); | |
1140 | argv[argc++] = p; | |
1141 | if (*p == '.' && p[1] == '\0') | |
1142 | dot_pos = argc; | |
1143 | } | |
1144 | } | |
53936ef9 | 1145 | argv[argc] = NULL; |
67b8f3df | 1146 | |
987a5467 WD |
1147 | glob_expand(NULL, NULL, NULL, NULL); |
1148 | ||
67b8f3df WD |
1149 | *argc_p = argc; |
1150 | *argv_p = argv; | |
56014c8c | 1151 | } |
7a55d06e | 1152 | |
8e6b4ddb | 1153 | BOOL io_start_buffering_out(int f_out) |
1f75bb10 | 1154 | { |
20caffd2 WD |
1155 | if (msgs2stderr && DEBUG_GTE(IO, 2)) |
1156 | rprintf(FINFO, "[%s] io_start_buffering_out(%d)\n", who_am_i(), f_out); | |
1157 | ||
1158 | if (OUT_MULTIPLEXED && !iobuf.msg.buf) { | |
1159 | iobuf.msg.size = IO_BUFFER_SIZE - 4; | |
1160 | if (!(iobuf.msg.buf = new_array(char, iobuf.msg.size + 4))) | |
1161 | out_of_memory("io_start_buffering_out"); | |
1162 | iobuf.msg.pos = iobuf.msg.len = 0; | |
1163 | } | |
1164 | ||
1165 | if (iobuf.out.buf) { | |
1166 | if (iobuf.out_fd == -1) | |
1167 | iobuf.out_fd = f_out; | |
1168 | assert(f_out == iobuf.out_fd); | |
8e6b4ddb | 1169 | return False; |
8ef246e0 | 1170 | } |
20caffd2 WD |
1171 | |
1172 | iobuf.out.size = IO_BUFFER_SIZE * 2 - 4; | |
1173 | /* The 4 overflow bytes makes some circular-buffer wrapping operations easier. */ | |
1174 | if (!(iobuf.out.buf = new_array(char, iobuf.out.size + 4))) | |
1f75bb10 | 1175 | out_of_memory("io_start_buffering_out"); |
20caffd2 WD |
1176 | iobuf.out.pos = iobuf.out.len = 0; |
1177 | iobuf.out_fd = f_out; | |
1178 | ||
8e6b4ddb | 1179 | return True; |
1f75bb10 WD |
1180 | } |
1181 | ||
8e6b4ddb | 1182 | BOOL io_start_buffering_in(int f_in) |
1f75bb10 | 1183 | { |
20caffd2 WD |
1184 | if (msgs2stderr && DEBUG_GTE(IO, 2)) |
1185 | rprintf(FINFO, "[%s] io_start_buffering_in(%d)\n", who_am_i(), f_in); | |
1186 | ||
1187 | if (iobuf.in.buf) { | |
1188 | if (iobuf.in_fd == -1) | |
1189 | iobuf.in_fd = f_in; | |
1190 | assert(f_in == iobuf.in_fd); | |
8e6b4ddb | 1191 | return False; |
8ef246e0 | 1192 | } |
20caffd2 WD |
1193 | |
1194 | iobuf.in.size = IO_BUFFER_SIZE; | |
1195 | if (!(iobuf.in.buf = new_array(char, iobuf.in.size))) | |
1f75bb10 | 1196 | out_of_memory("io_start_buffering_in"); |
20caffd2 WD |
1197 | |
1198 | iobuf.in.pos = iobuf.in.len = 0; | |
1199 | ||
1200 | iobuf.in_fd = f_in; | |
1201 | ||
8e6b4ddb | 1202 | return True; |
1f75bb10 WD |
1203 | } |
1204 | ||
20caffd2 | 1205 | void io_end_buffering_in(BOOL free_buffers) |
8ef246e0 | 1206 | { |
705132bc WD |
1207 | if (msgs2stderr && DEBUG_GTE(IO, 2)) { |
1208 | rprintf(FINFO, "[%s] io_end_buffering_in(IOBUF_%s_BUFS)\n", | |
1209 | who_am_i(), free_buffers ? "FREE" : "KEEP"); | |
20caffd2 WD |
1210 | } |
1211 | ||
1212 | if (free_buffers) | |
1213 | free_xbuf(&iobuf.in); | |
1214 | else | |
1215 | iobuf.in.pos = iobuf.in.len = 0; | |
1216 | ||
1217 | iobuf.in_fd = -1; | |
1218 | } | |
1219 | ||
1220 | void io_end_buffering_out(BOOL free_buffers) | |
1221 | { | |
705132bc WD |
1222 | if (msgs2stderr && DEBUG_GTE(IO, 2)) { |
1223 | rprintf(FINFO, "[%s] io_end_buffering_out(IOBUF_%s_BUFS)\n", | |
1224 | who_am_i(), free_buffers ? "FREE" : "KEEP"); | |
20caffd2 WD |
1225 | } |
1226 | ||
8ef246e0 | 1227 | io_flush(FULL_FLUSH); |
20caffd2 WD |
1228 | |
1229 | if (free_buffers) { | |
1230 | free_xbuf(&iobuf.out); | |
1231 | free_xbuf(&iobuf.msg); | |
20caffd2 WD |
1232 | } |
1233 | ||
1234 | iobuf.out_fd = -1; | |
1f75bb10 WD |
1235 | } |
1236 | ||
be91bd81 | 1237 | void maybe_flush_socket(int important) |
626bec8e | 1238 | { |
1ec57e4d WD |
1239 | if (flist_eof && iobuf.out.buf && iobuf.out.len > iobuf.out_empty_len |
1240 | && (important || time(NULL) - last_io_out >= 5)) | |
626bec8e WD |
1241 | io_flush(NORMAL_FLUSH); |
1242 | } | |
1243 | ||
cdf236aa | 1244 | void maybe_send_keepalive(void) |
9e2409ab | 1245 | { |
3b0a30eb | 1246 | if (time(NULL) - last_io_out >= allowed_lull) { |
20caffd2 | 1247 | if (!iobuf.msg.len && iobuf.out.len == iobuf.out_empty_len) { |
3221f451 WD |
1248 | if (protocol_version < 29) |
1249 | return; /* there's nothing we can do */ | |
8ef246e0 | 1250 | if (protocol_version >= 30) |
332cf6df | 1251 | send_msg(MSG_NOOP, "", 0, 0); |
8ef246e0 | 1252 | else { |
20caffd2 WD |
1253 | write_int(iobuf.out_fd, cur_flist->used); |
1254 | write_shortint(iobuf.out_fd, ITEM_IS_NEW); | |
8ef246e0 | 1255 | } |
9e2409ab | 1256 | } |
20caffd2 WD |
1257 | if (iobuf.msg.len) |
1258 | perform_io(iobuf.msg.size - iobuf.msg.len + 1, PIO_NEED_MSGROOM); | |
1259 | else if (iobuf.out.len > iobuf.out_empty_len) | |
9e2409ab WD |
1260 | io_flush(NORMAL_FLUSH); |
1261 | } | |
1262 | } | |
1263 | ||
20caffd2 | 1264 | void start_flist_forward(int ndx) |
8ef246e0 | 1265 | { |
20caffd2 WD |
1266 | write_int(iobuf.out_fd, ndx); |
1267 | forward_flist_data = 1; | |
8ef246e0 WD |
1268 | } |
1269 | ||
20caffd2 | 1270 | void stop_flist_forward(void) |
4c36ddbe | 1271 | { |
20caffd2 | 1272 | forward_flist_data = 0; |
8d9dc9f9 AT |
1273 | } |
1274 | ||
d8587b46 | 1275 | /* Read a message from a multiplexed source. */ |
20caffd2 | 1276 | static void read_a_msg(void) |
8d9dc9f9 | 1277 | { |
20caffd2 | 1278 | char *data, line[BIGPATHBUFLEN]; |
a0f1ed55 | 1279 | int tag, val; |
d8587b46 | 1280 | size_t msg_bytes; |
d8587b46 | 1281 | |
20caffd2 WD |
1282 | data = perform_io(4, PIO_INPUT_AND_CONSUME); |
1283 | tag = IVAL(data, 0); | |
d8587b46 WD |
1284 | |
1285 | msg_bytes = tag & 0xFFFFFF; | |
1286 | tag = (tag >> 24) - MPLEX_BASE; | |
1287 | ||
20caffd2 WD |
1288 | if (DEBUG_GTE(IO, 1) && (msgs2stderr || tag != MSG_INFO)) |
1289 | rprintf(FINFO, "[%s] got msg=%d, len=%ld\n", who_am_i(), (int)tag, (long)msg_bytes); | |
d8587b46 WD |
1290 | |
1291 | switch (tag) { | |
1292 | case MSG_DATA: | |
20caffd2 WD |
1293 | assert(iobuf.raw_input_ends_before == 0); |
1294 | /* Though this does not yet read the data, we do mark where in | |
1295 | * the buffer the msg data will end once it is read. It is | |
1296 | * possible that this points off the end of the buffer, in | |
1297 | * which case the gradual reading of the input stream will | |
1298 | * cause this value to decrease and eventually become real. */ | |
1299 | iobuf.raw_input_ends_before = iobuf.in.pos + msg_bytes; | |
d8587b46 | 1300 | break; |
20caffd2 WD |
1301 | case MSG_STATS: |
1302 | if (msg_bytes != sizeof stats.total_read || !am_generator) | |
d8587b46 | 1303 | goto invalid_msg; |
20caffd2 WD |
1304 | data = perform_io(sizeof stats.total_read, PIO_INPUT_AND_CONSUME); |
1305 | memcpy((char*)&stats.total_read, data, sizeof stats.total_read); | |
d8587b46 WD |
1306 | break; |
1307 | case MSG_REDO: | |
1308 | if (msg_bytes != 4 || !am_generator) | |
1309 | goto invalid_msg; | |
20caffd2 WD |
1310 | data = perform_io(4, PIO_INPUT_AND_CONSUME); |
1311 | got_flist_entry_status(FES_REDO, IVAL(data, 0)); | |
d8587b46 WD |
1312 | break; |
1313 | case MSG_IO_ERROR: | |
1314 | if (msg_bytes != 4 || am_sender) | |
1315 | goto invalid_msg; | |
20caffd2 WD |
1316 | data = perform_io(4, PIO_INPUT_AND_CONSUME); |
1317 | io_error |= IVAL(data, 0); | |
d8587b46 | 1318 | if (!am_generator) |
20caffd2 | 1319 | send_msg(MSG_IO_ERROR, data, 4, 0); |
d8587b46 | 1320 | break; |
a0f1ed55 | 1321 | case MSG_IO_TIMEOUT: |
84c11e85 | 1322 | if (msg_bytes != 4 || am_server || am_generator) |
a0f1ed55 WD |
1323 | goto invalid_msg; |
1324 | data = perform_io(4, PIO_INPUT_AND_CONSUME); | |
1325 | val = IVAL(data, 0); | |
1326 | if (!io_timeout || io_timeout > val) { | |
1327 | if (INFO_GTE(MISC, 2)) | |
1328 | rprintf(FINFO, "Setting --timeout=%d to match server\n", val); | |
4655dcf2 | 1329 | set_io_timeout(val); |
a0f1ed55 WD |
1330 | } |
1331 | break; | |
d8587b46 WD |
1332 | case MSG_NOOP: |
1333 | if (am_sender) | |
1334 | maybe_send_keepalive(); | |
1335 | break; | |
d8587b46 WD |
1336 | case MSG_DELETED: |
1337 | if (msg_bytes >= sizeof line) | |
1338 | goto overflow; | |
1339 | if (am_generator) { | |
20caffd2 | 1340 | memcpy(line, perform_io(msg_bytes, PIO_INPUT_AND_CONSUME), msg_bytes); |
d8587b46 WD |
1341 | send_msg(MSG_DELETED, line, msg_bytes, 1); |
1342 | break; | |
1343 | } | |
1344 | #ifdef ICONV_OPTION | |
1345 | if (ic_recv != (iconv_t)-1) { | |
1346 | xbuf outbuf, inbuf; | |
1347 | char ibuf[512]; | |
1348 | int add_null = 0; | |
cbc63a09 | 1349 | int flags = ICB_INCLUDE_BAD | ICB_INIT; |
d8587b46 WD |
1350 | |
1351 | INIT_CONST_XBUF(outbuf, line); | |
1352 | INIT_XBUF(inbuf, ibuf, 0, (size_t)-1); | |
1353 | ||
1354 | while (msg_bytes) { | |
cbc63a09 WD |
1355 | size_t len = msg_bytes > sizeof ibuf - inbuf.len ? sizeof ibuf - inbuf.len : msg_bytes; |
1356 | memcpy(ibuf + inbuf.len, perform_io(len, PIO_INPUT_AND_CONSUME), len); | |
d8a7290f | 1357 | inbuf.pos = 0; |
cbc63a09 WD |
1358 | inbuf.len += len; |
1359 | if (!(msg_bytes -= len) && !ibuf[inbuf.len-1]) | |
d8587b46 | 1360 | inbuf.len--, add_null = 1; |
cbc63a09 WD |
1361 | if (iconvbufs(ic_send, &inbuf, &outbuf, flags) < 0) { |
1362 | if (errno == E2BIG) | |
1363 | goto overflow; | |
1364 | /* Buffer ended with an incomplete char, so move the | |
1365 | * bytes to the start of the buffer and continue. */ | |
1366 | memmove(ibuf, ibuf + inbuf.pos, inbuf.len); | |
1367 | } | |
1368 | flags &= ~ICB_INIT; | |
d8587b46 WD |
1369 | } |
1370 | if (add_null) { | |
1371 | if (outbuf.len == outbuf.size) | |
1372 | goto overflow; | |
1373 | outbuf.buf[outbuf.len++] = '\0'; | |
1374 | } | |
1375 | msg_bytes = outbuf.len; | |
1376 | } else | |
1377 | #endif | |
20caffd2 | 1378 | memcpy(line, perform_io(msg_bytes, PIO_INPUT_AND_CONSUME), msg_bytes); |
d8587b46 WD |
1379 | /* A directory name was sent with the trailing null */ |
1380 | if (msg_bytes > 0 && !line[msg_bytes-1]) | |
1381 | log_delete(line, S_IFDIR); | |
1382 | else { | |
1383 | line[msg_bytes] = '\0'; | |
1384 | log_delete(line, S_IFREG); | |
1385 | } | |
1386 | break; | |
1387 | case MSG_SUCCESS: | |
1388 | if (msg_bytes != 4) { | |
1389 | invalid_msg: | |
1390 | rprintf(FERROR, "invalid multi-message %d:%lu [%s%s]\n", | |
1391 | tag, (unsigned long)msg_bytes, who_am_i(), | |
1392 | inc_recurse ? "/inc" : ""); | |
1393 | exit_cleanup(RERR_STREAMIO); | |
1394 | } | |
20caffd2 | 1395 | data = perform_io(4, PIO_INPUT_AND_CONSUME); |
d8587b46 | 1396 | if (am_generator) |
20caffd2 | 1397 | got_flist_entry_status(FES_SUCCESS, IVAL(data, 0)); |
d8587b46 | 1398 | else |
20caffd2 | 1399 | successful_send(IVAL(data, 0)); |
d8587b46 WD |
1400 | break; |
1401 | case MSG_NO_SEND: | |
1402 | if (msg_bytes != 4) | |
1403 | goto invalid_msg; | |
20caffd2 | 1404 | data = perform_io(4, PIO_INPUT_AND_CONSUME); |
d8587b46 | 1405 | if (am_generator) |
20caffd2 | 1406 | got_flist_entry_status(FES_NO_SEND, IVAL(data, 0)); |
d8587b46 | 1407 | else |
20caffd2 | 1408 | send_msg(MSG_NO_SEND, data, 4, 0); |
d8587b46 WD |
1409 | break; |
1410 | case MSG_ERROR_SOCKET: | |
1411 | case MSG_ERROR_UTF8: | |
1412 | case MSG_CLIENT: | |
1413 | case MSG_LOG: | |
1414 | if (!am_generator) | |
1415 | goto invalid_msg; | |
1416 | if (tag == MSG_ERROR_SOCKET) | |
20caffd2 | 1417 | msgs2stderr = 1; |
d8587b46 WD |
1418 | /* FALL THROUGH */ |
1419 | case MSG_INFO: | |
1420 | case MSG_ERROR: | |
1421 | case MSG_ERROR_XFER: | |
1422 | case MSG_WARNING: | |
1423 | if (msg_bytes >= sizeof line) { | |
1424 | overflow: | |
1425 | rprintf(FERROR, | |
1426 | "multiplexing overflow %d:%lu [%s%s]\n", | |
1427 | tag, (unsigned long)msg_bytes, who_am_i(), | |
1428 | inc_recurse ? "/inc" : ""); | |
1429 | exit_cleanup(RERR_STREAMIO); | |
1430 | } | |
20caffd2 | 1431 | memcpy(line, perform_io(msg_bytes, PIO_INPUT_AND_CONSUME), msg_bytes); |
d8587b46 WD |
1432 | rwrite((enum logcode)tag, line, msg_bytes, !am_generator); |
1433 | if (first_message) { | |
20caffd2 | 1434 | if (list_only && !am_sender && tag == 1 && msg_bytes < sizeof line) { |
d8587b46 WD |
1435 | line[msg_bytes] = '\0'; |
1436 | check_for_d_option_error(line); | |
1437 | } | |
1438 | first_message = 0; | |
1439 | } | |
1440 | break; | |
f9185203 | 1441 | case MSG_ERROR_EXIT: |
304d7b58 WD |
1442 | if (msg_bytes == 0) { |
1443 | if (!am_sender && !am_generator) { | |
1444 | send_msg(MSG_ERROR_EXIT, "", 0, 0); | |
1445 | io_flush(FULL_FLUSH); | |
1446 | } | |
1447 | val = 0; | |
1448 | } else if (msg_bytes == 4) { | |
1449 | data = perform_io(4, PIO_INPUT_AND_CONSUME); | |
1450 | val = IVAL(data, 0); | |
1451 | if (protocol_version >= 31) { | |
1452 | if (am_generator) | |
1453 | send_msg_int(MSG_ERROR_EXIT, val); | |
1454 | else | |
1455 | send_msg(MSG_ERROR_EXIT, "", 0, 0); | |
1456 | } | |
1457 | } else | |
f9185203 | 1458 | goto invalid_msg; |
304d7b58 WD |
1459 | /* Send a negative linenum so that we don't end up |
1460 | * with a duplicate exit message. */ | |
1461 | _exit_cleanup(val, __FILE__, 0 - __LINE__); | |
d8587b46 WD |
1462 | default: |
1463 | rprintf(FERROR, "unexpected tag %d [%s%s]\n", | |
1464 | tag, who_am_i(), inc_recurse ? "/inc" : ""); | |
1465 | exit_cleanup(RERR_STREAMIO); | |
1466 | } | |
d8587b46 WD |
1467 | } |
1468 | ||
20caffd2 | 1469 | void wait_for_receiver(void) |
d8587b46 | 1470 | { |
20caffd2 WD |
1471 | if (!iobuf.raw_input_ends_before) |
1472 | read_a_msg(); | |
1473 | ||
1474 | if (iobuf.raw_input_ends_before) { | |
1475 | int ndx = read_int(iobuf.in_fd); | |
1476 | if (ndx < 0) { | |
1477 | switch (ndx) { | |
1478 | case NDX_FLIST_EOF: | |
1479 | flist_eof = 1; | |
1480 | if (DEBUG_GTE(FLIST, 3)) | |
1481 | rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i()); | |
1482 | break; | |
1483 | case NDX_DONE: | |
1484 | msgdone_cnt++; | |
1485 | break; | |
1486 | default: | |
1487 | exit_cleanup(RERR_STREAMIO); | |
1488 | } | |
1489 | } else { | |
1490 | struct file_list *flist; | |
1491 | if (DEBUG_GTE(FLIST, 2)) { | |
1492 | rprintf(FINFO, "[%s] receiving flist for dir %d\n", | |
1493 | who_am_i(), ndx); | |
1494 | } | |
1495 | flist = recv_file_list(iobuf.in_fd); | |
1496 | flist->parent_ndx = ndx; | |
1497 | #ifdef SUPPORT_HARD_LINKS | |
1498 | if (preserve_hard_links) | |
1499 | match_hard_links(flist); | |
1500 | #endif | |
8d9dc9f9 | 1501 | } |
b9f592fb | 1502 | } |
720b47f2 AT |
1503 | } |
1504 | ||
3a993aa4 | 1505 | unsigned short read_shortint(int f) |
9361f839 | 1506 | { |
482f48cc | 1507 | char b[2]; |
20caffd2 | 1508 | read_buf(f, b, 2); |
482f48cc | 1509 | return (UVAL(b, 1) << 8) + UVAL(b, 0); |
9361f839 WD |
1510 | } |
1511 | ||
b7922338 | 1512 | int32 read_int(int f) |
720b47f2 | 1513 | { |
4c36ddbe | 1514 | char b[4]; |
d8aeda1e | 1515 | int32 num; |
d730b113 | 1516 | |
20caffd2 | 1517 | read_buf(f, b, 4); |
482f48cc WD |
1518 | num = IVAL(b, 0); |
1519 | #if SIZEOF_INT32 > 4 | |
1520 | if (num & (int32)0x80000000) | |
1521 | num |= ~(int32)0xffffffff; | |
1522 | #endif | |
d8aeda1e | 1523 | return num; |
720b47f2 AT |
1524 | } |
1525 | ||
351e23ad | 1526 | int32 read_varint(int f) |
3a6a366f | 1527 | { |
351e23ad | 1528 | union { |
20caffd2 WD |
1529 | char b[5]; |
1530 | int32 x; | |
351e23ad WD |
1531 | } u; |
1532 | uchar ch; | |
1533 | int extra; | |
1534 | ||
1535 | u.x = 0; | |
20caffd2 | 1536 | ch = read_byte(f); |
351e23ad WD |
1537 | extra = int_byte_extra[ch / 4]; |
1538 | if (extra) { | |
1539 | uchar bit = ((uchar)1<<(8-extra)); | |
1540 | if (extra >= (int)sizeof u.b) { | |
1541 | rprintf(FERROR, "Overflow in read_varint()\n"); | |
1542 | exit_cleanup(RERR_STREAMIO); | |
1543 | } | |
20caffd2 | 1544 | read_buf(f, u.b, extra); |
351e23ad WD |
1545 | u.b[extra] = ch & (bit-1); |
1546 | } else | |
1547 | u.b[0] = ch; | |
1548 | #if CAREFUL_ALIGNMENT | |
1549 | u.x = IVAL(u.b,0); | |
1550 | #endif | |
1551 | #if SIZEOF_INT32 > 4 | |
1552 | if (u.x & (int32)0x80000000) | |
1553 | u.x |= ~(int32)0xffffffff; | |
1554 | #endif | |
1555 | return u.x; | |
1556 | } | |
71c46176 | 1557 | |
351e23ad WD |
1558 | int64 read_varlong(int f, uchar min_bytes) |
1559 | { | |
1560 | union { | |
20caffd2 WD |
1561 | char b[9]; |
1562 | int64 x; | |
351e23ad WD |
1563 | } u; |
1564 | char b2[8]; | |
1565 | int extra; | |
71c46176 | 1566 | |
031fa9ad | 1567 | #if SIZEOF_INT64 < 8 |
351e23ad | 1568 | memset(u.b, 0, 8); |
031fa9ad | 1569 | #else |
351e23ad | 1570 | u.x = 0; |
031fa9ad | 1571 | #endif |
20caffd2 | 1572 | read_buf(f, b2, min_bytes); |
351e23ad WD |
1573 | memcpy(u.b, b2+1, min_bytes-1); |
1574 | extra = int_byte_extra[CVAL(b2, 0) / 4]; | |
1575 | if (extra) { | |
1576 | uchar bit = ((uchar)1<<(8-extra)); | |
1577 | if (min_bytes + extra > (int)sizeof u.b) { | |
1578 | rprintf(FERROR, "Overflow in read_varlong()\n"); | |
1579 | exit_cleanup(RERR_STREAMIO); | |
1580 | } | |
20caffd2 | 1581 | read_buf(f, u.b + min_bytes - 1, extra); |
351e23ad | 1582 | u.b[min_bytes + extra - 1] = CVAL(b2, 0) & (bit-1); |
4ea4acf1 | 1583 | #if SIZEOF_INT64 < 8 |
351e23ad | 1584 | if (min_bytes + extra > 5 || u.b[4] || CVAL(u.b,3) & 0x80) { |
4ea4acf1 WD |
1585 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); |
1586 | exit_cleanup(RERR_UNSUPPORTED); | |
1587 | } | |
1588 | #endif | |
351e23ad WD |
1589 | } else |
1590 | u.b[min_bytes + extra - 1] = CVAL(b2, 0); | |
1591 | #if SIZEOF_INT64 < 8 | |
1592 | u.x = IVAL(u.b,0); | |
1593 | #elif CAREFUL_ALIGNMENT | |
1594 | u.x = IVAL(u.b,0) | (((int64)IVAL(u.b,4))<<32); | |
1595 | #endif | |
1596 | return u.x; | |
1597 | } | |
1598 | ||
1599 | int64 read_longint(int f) | |
1600 | { | |
4ea4acf1 | 1601 | #if SIZEOF_INT64 >= 8 |
351e23ad | 1602 | char b[9]; |
4ea4acf1 | 1603 | #endif |
351e23ad | 1604 | int32 num = read_int(f); |
71c46176 | 1605 | |
351e23ad WD |
1606 | if (num != (int32)0xffffffff) |
1607 | return num; | |
1608 | ||
1609 | #if SIZEOF_INT64 < 8 | |
1610 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); | |
1611 | exit_cleanup(RERR_UNSUPPORTED); | |
1612 | #else | |
20caffd2 | 1613 | read_buf(f, b, 8); |
351e23ad WD |
1614 | return IVAL(b,0) | (((int64)IVAL(b,4))<<32); |
1615 | #endif | |
3a6a366f AT |
1616 | } |
1617 | ||
4a19c3b2 | 1618 | void read_buf(int f, char *buf, size_t len) |
720b47f2 | 1619 | { |
20caffd2 WD |
1620 | if (f != iobuf.in_fd) { |
1621 | if (safe_read(f, buf, len) != len) | |
1622 | whine_about_eof(f); /* Doesn't return. */ | |
1623 | goto batch_copy; | |
1624 | } | |
1625 | ||
1626 | if (!IN_MULTIPLEXED) { | |
1627 | memcpy(buf, perform_io(len, PIO_INPUT_AND_CONSUME), len); | |
4dde3347 | 1628 | total_data_read += len; |
20caffd2 WD |
1629 | if (forward_flist_data) |
1630 | write_buf(iobuf.out_fd, buf, len); | |
1631 | batch_copy: | |
1632 | if (f == write_batch_monitor_in) | |
1633 | safe_write(batch_fd, buf, len); | |
1634 | return; | |
1635 | } | |
1636 | ||
1637 | while (1) { | |
1638 | char *data; | |
1639 | size_t siz; | |
1640 | ||
1641 | while (!iobuf.raw_input_ends_before) | |
1642 | read_a_msg(); | |
1643 | ||
1644 | siz = MIN(len, iobuf.raw_input_ends_before - iobuf.in.pos); | |
1645 | data = perform_io(siz, PIO_INPUT_AND_CONSUME); | |
1646 | if (iobuf.in.pos == iobuf.raw_input_ends_before) | |
1647 | iobuf.raw_input_ends_before = 0; | |
1648 | ||
1649 | /* The bytes at the "data" pointer will survive long | |
1650 | * enough to make a copy, but not past future I/O. */ | |
1651 | memcpy(buf, data, siz); | |
4dde3347 | 1652 | total_data_read += siz; |
20caffd2 WD |
1653 | |
1654 | if (forward_flist_data) | |
1655 | write_buf(iobuf.out_fd, buf, siz); | |
1656 | ||
1657 | if (f == write_batch_monitor_in) | |
1658 | safe_write(batch_fd, buf, siz); | |
1659 | ||
1660 | if ((len -= siz) == 0) | |
1661 | break; | |
1662 | buf += siz; | |
1663 | } | |
720b47f2 AT |
1664 | } |
1665 | ||
4a19c3b2 | 1666 | void read_sbuf(int f, char *buf, size_t len) |
575f2fca | 1667 | { |
20caffd2 | 1668 | read_buf(f, buf, len); |
af436313 | 1669 | buf[len] = '\0'; |
575f2fca AT |
1670 | } |
1671 | ||
9361f839 | 1672 | uchar read_byte(int f) |
182dca5c | 1673 | { |
9361f839 | 1674 | uchar c; |
20caffd2 | 1675 | read_buf(f, (char*)&c, 1); |
4c36ddbe | 1676 | return c; |
182dca5c | 1677 | } |
720b47f2 | 1678 | |
46e99b09 WD |
1679 | int read_vstring(int f, char *buf, int bufsize) |
1680 | { | |
1681 | int len = read_byte(f); | |
1682 | ||
1683 | if (len & 0x80) | |
1684 | len = (len & ~0x80) * 0x100 + read_byte(f); | |
1685 | ||
1686 | if (len >= bufsize) { | |
1687 | rprintf(FERROR, "over-long vstring received (%d > %d)\n", | |
1688 | len, bufsize - 1); | |
9a6ed83f | 1689 | return -1; |
46e99b09 WD |
1690 | } |
1691 | ||
1692 | if (len) | |
20caffd2 | 1693 | read_buf(f, buf, len); |
46e99b09 WD |
1694 | buf[len] = '\0'; |
1695 | return len; | |
1696 | } | |
1697 | ||
188fed95 WD |
1698 | /* Populate a sum_struct with values from the socket. This is |
1699 | * called by both the sender and the receiver. */ | |
1700 | void read_sum_head(int f, struct sum_struct *sum) | |
1701 | { | |
8bd77e70 | 1702 | int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE; |
188fed95 | 1703 | sum->count = read_int(f); |
c638caa6 WD |
1704 | if (sum->count < 0) { |
1705 | rprintf(FERROR, "Invalid checksum count %ld [%s]\n", | |
1706 | (long)sum->count, who_am_i()); | |
1707 | exit_cleanup(RERR_PROTOCOL); | |
1708 | } | |
188fed95 | 1709 | sum->blength = read_int(f); |
8bd77e70 | 1710 | if (sum->blength < 0 || sum->blength > max_blength) { |
cdf236aa WD |
1711 | rprintf(FERROR, "Invalid block length %ld [%s]\n", |
1712 | (long)sum->blength, who_am_i()); | |
188fed95 WD |
1713 | exit_cleanup(RERR_PROTOCOL); |
1714 | } | |
1715 | sum->s2length = protocol_version < 27 ? csum_length : (int)read_int(f); | |
a0456b9c | 1716 | if (sum->s2length < 0 || sum->s2length > MAX_DIGEST_LEN) { |
cdf236aa WD |
1717 | rprintf(FERROR, "Invalid checksum length %d [%s]\n", |
1718 | sum->s2length, who_am_i()); | |
188fed95 WD |
1719 | exit_cleanup(RERR_PROTOCOL); |
1720 | } | |
1721 | sum->remainder = read_int(f); | |
1722 | if (sum->remainder < 0 || sum->remainder > sum->blength) { | |
cdf236aa WD |
1723 | rprintf(FERROR, "Invalid remainder length %ld [%s]\n", |
1724 | (long)sum->remainder, who_am_i()); | |
188fed95 WD |
1725 | exit_cleanup(RERR_PROTOCOL); |
1726 | } | |
1727 | } | |
1728 | ||
c207d7ec WD |
1729 | /* Send the values from a sum_struct over the socket. Set sum to |
1730 | * NULL if there are no checksums to send. This is called by both | |
1731 | * the generator and the sender. */ | |
1732 | void write_sum_head(int f, struct sum_struct *sum) | |
1733 | { | |
1734 | static struct sum_struct null_sum; | |
1735 | ||
1736 | if (sum == NULL) | |
1737 | sum = &null_sum; | |
1738 | ||
1739 | write_int(f, sum->count); | |
1740 | write_int(f, sum->blength); | |
1741 | if (protocol_version >= 27) | |
1742 | write_int(f, sum->s2length); | |
1743 | write_int(f, sum->remainder); | |
1744 | } | |
1745 | ||
20caffd2 | 1746 | /* Sleep after writing to limit I/O bandwidth usage. |
08571358 MP |
1747 | * |
1748 | * @todo Rather than sleeping after each write, it might be better to | |
1749 | * use some kind of averaging. The current algorithm seems to always | |
1750 | * use a bit less bandwidth than specified, because it doesn't make up | |
1751 | * for slow periods. But arguably this is a feature. In addition, we | |
1752 | * ought to take the time used to write the data into account. | |
71e58630 WD |
1753 | * |
1754 | * During some phases of big transfers (file FOO is uptodate) this is | |
1755 | * called with a small bytes_written every time. As the kernel has to | |
1756 | * round small waits up to guarantee that we actually wait at least the | |
1757 | * requested number of microseconds, this can become grossly inaccurate. | |
1758 | * We therefore keep track of the bytes we've written over time and only | |
20caffd2 | 1759 | * sleep when the accumulated delay is at least 1 tenth of a second. */ |
08571358 MP |
1760 | static void sleep_for_bwlimit(int bytes_written) |
1761 | { | |
71e58630 | 1762 | static struct timeval prior_tv; |
0f78b815 | 1763 | static long total_written = 0; |
71e58630 WD |
1764 | struct timeval tv, start_tv; |
1765 | long elapsed_usec, sleep_usec; | |
1766 | ||
1767 | #define ONE_SEC 1000000L /* # of microseconds in a second */ | |
08571358 | 1768 | |
0f78b815 | 1769 | total_written += bytes_written; |
71e58630 WD |
1770 | |
1771 | gettimeofday(&start_tv, NULL); | |
1772 | if (prior_tv.tv_sec) { | |
1773 | elapsed_usec = (start_tv.tv_sec - prior_tv.tv_sec) * ONE_SEC | |
1774 | + (start_tv.tv_usec - prior_tv.tv_usec); | |
1775 | total_written -= elapsed_usec * bwlimit / (ONE_SEC/1024); | |
1776 | if (total_written < 0) | |
1777 | total_written = 0; | |
1778 | } | |
3151cbae | 1779 | |
71e58630 WD |
1780 | sleep_usec = total_written * (ONE_SEC/1024) / bwlimit; |
1781 | if (sleep_usec < ONE_SEC / 10) { | |
1782 | prior_tv = start_tv; | |
1783 | return; | |
1784 | } | |
08571358 | 1785 | |
71e58630 WD |
1786 | tv.tv_sec = sleep_usec / ONE_SEC; |
1787 | tv.tv_usec = sleep_usec % ONE_SEC; | |
98b332ed | 1788 | select(0, NULL, NULL, NULL, &tv); |
71e58630 WD |
1789 | |
1790 | gettimeofday(&prior_tv, NULL); | |
1791 | elapsed_usec = (prior_tv.tv_sec - start_tv.tv_sec) * ONE_SEC | |
1792 | + (prior_tv.tv_usec - start_tv.tv_usec); | |
1793 | total_written = (sleep_usec - elapsed_usec) * bwlimit / (ONE_SEC/1024); | |
08571358 MP |
1794 | } |
1795 | ||
20caffd2 | 1796 | void io_flush(int flush_it_all) |
d6dead6b | 1797 | { |
20caffd2 WD |
1798 | if (iobuf.out.len > iobuf.out_empty_len) { |
1799 | if (flush_it_all) /* FULL_FLUSH: flush everything in the output buffers */ | |
1800 | perform_io(iobuf.out.size - iobuf.out_empty_len, PIO_NEED_OUTROOM); | |
1801 | else /* NORMAL_FLUSH: flush at least 1 byte */ | |
1802 | perform_io(iobuf.out.size - iobuf.out.len + 1, PIO_NEED_OUTROOM); | |
d6dead6b | 1803 | } |
20caffd2 WD |
1804 | if (iobuf.msg.len) |
1805 | perform_io(iobuf.msg.size, PIO_NEED_MSGROOM); | |
d6dead6b | 1806 | } |
720b47f2 | 1807 | |
3a993aa4 | 1808 | void write_shortint(int f, unsigned short x) |
9361f839 | 1809 | { |
3a993aa4 WD |
1810 | char b[2]; |
1811 | b[0] = (char)x; | |
1812 | b[1] = (char)(x >> 8); | |
20caffd2 | 1813 | write_buf(f, b, 2); |
9361f839 WD |
1814 | } |
1815 | ||
351e23ad WD |
1816 | void write_int(int f, int32 x) |
1817 | { | |
1818 | char b[4]; | |
1819 | SIVAL(b, 0, x); | |
20caffd2 | 1820 | write_buf(f, b, 4); |
351e23ad WD |
1821 | } |
1822 | ||
f31514ad | 1823 | void write_varint(int f, int32 x) |
1c3344a1 WD |
1824 | { |
1825 | char b[5]; | |
351e23ad WD |
1826 | uchar bit; |
1827 | int cnt = 4; | |
1828 | ||
1829 | SIVAL(b, 1, x); | |
1830 | ||
1831 | while (cnt > 1 && b[cnt] == 0) | |
1832 | cnt--; | |
1833 | bit = ((uchar)1<<(7-cnt+1)); | |
1834 | if (CVAL(b, cnt) >= bit) { | |
1835 | cnt++; | |
1836 | *b = ~(bit-1); | |
1837 | } else if (cnt > 1) | |
1838 | *b = b[cnt] | ~(bit*2-1); | |
1839 | else | |
1840 | *b = b[cnt]; | |
1841 | ||
20caffd2 | 1842 | write_buf(f, b, cnt); |
1c3344a1 WD |
1843 | } |
1844 | ||
351e23ad | 1845 | void write_varlong(int f, int64 x, uchar min_bytes) |
720b47f2 | 1846 | { |
351e23ad WD |
1847 | char b[9]; |
1848 | uchar bit; | |
1849 | int cnt = 8; | |
1850 | ||
1851 | SIVAL(b, 1, x); | |
1852 | #if SIZEOF_INT64 >= 8 | |
1853 | SIVAL(b, 5, x >> 32); | |
1854 | #else | |
1855 | if (x <= 0x7FFFFFFF && x >= 0) | |
1856 | memset(b + 5, 0, 4); | |
1857 | else { | |
1858 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); | |
1859 | exit_cleanup(RERR_UNSUPPORTED); | |
1860 | } | |
1861 | #endif | |
1862 | ||
1863 | while (cnt > min_bytes && b[cnt] == 0) | |
1864 | cnt--; | |
1865 | bit = ((uchar)1<<(7-cnt+min_bytes)); | |
1866 | if (CVAL(b, cnt) >= bit) { | |
1867 | cnt++; | |
1868 | *b = ~(bit-1); | |
1869 | } else if (cnt > min_bytes) | |
1870 | *b = b[cnt] | ~(bit*2-1); | |
1871 | else | |
1872 | *b = b[cnt]; | |
1873 | ||
20caffd2 | 1874 | write_buf(f, b, cnt); |
720b47f2 AT |
1875 | } |
1876 | ||
7a24c346 MP |
1877 | /* |
1878 | * Note: int64 may actually be a 32-bit type if ./configure couldn't find any | |
1879 | * 64-bit types on this platform. | |
1880 | */ | |
71c46176 | 1881 | void write_longint(int f, int64 x) |
3a6a366f | 1882 | { |
351e23ad | 1883 | char b[12], * const s = b+4; |
3a6a366f | 1884 | |
351e23ad WD |
1885 | SIVAL(s, 0, x); |
1886 | if (x <= 0x7FFFFFFF && x >= 0) { | |
20caffd2 | 1887 | write_buf(f, s, 4); |
351e23ad WD |
1888 | return; |
1889 | } | |
3a6a366f | 1890 | |
4ea4acf1 | 1891 | #if SIZEOF_INT64 < 8 |
351e23ad WD |
1892 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); |
1893 | exit_cleanup(RERR_UNSUPPORTED); | |
4ea4acf1 | 1894 | #else |
351e23ad WD |
1895 | memset(b, 0xFF, 4); |
1896 | SIVAL(s, 4, x >> 32); | |
20caffd2 | 1897 | write_buf(f, b, 12); |
4ea4acf1 | 1898 | #endif |
3a6a366f AT |
1899 | } |
1900 | ||
4a19c3b2 | 1901 | void write_buf(int f, const char *buf, size_t len) |
720b47f2 | 1902 | { |
20caffd2 WD |
1903 | size_t pos, siz; |
1904 | ||
1905 | if (f != iobuf.out_fd) { | |
1906 | safe_write(f, buf, len); | |
1907 | goto batch_copy; | |
1908 | } | |
1909 | ||
75ea8459 | 1910 | if (iobuf.out.len + len > iobuf.out.size) |
20caffd2 WD |
1911 | perform_io(len, PIO_NEED_OUTROOM); |
1912 | ||
1913 | pos = iobuf.out.pos + iobuf.out.len; /* Must be set after any flushing. */ | |
1914 | if (pos >= iobuf.out.size) | |
1915 | pos -= iobuf.out.size; | |
1916 | ||
1917 | /* Handle a split copy if we wrap around the end of the circular buffer. */ | |
1918 | if (pos >= iobuf.out.pos && (siz = iobuf.out.size - pos) < len) { | |
1919 | memcpy(iobuf.out.buf + pos, buf, siz); | |
1920 | memcpy(iobuf.out.buf, buf + siz, len - siz); | |
1921 | } else | |
1922 | memcpy(iobuf.out.buf + pos, buf, len); | |
1923 | ||
1924 | iobuf.out.len += len; | |
4dde3347 | 1925 | total_data_written += len; |
20caffd2 WD |
1926 | |
1927 | batch_copy: | |
1928 | if (f == write_batch_monitor_out) | |
1929 | safe_write(batch_fd, buf, len); | |
720b47f2 AT |
1930 | } |
1931 | ||
20caffd2 | 1932 | /* Write a string to the connection */ |
4a19c3b2 | 1933 | void write_sbuf(int f, const char *buf) |
f0fca04e | 1934 | { |
20caffd2 | 1935 | write_buf(f, buf, strlen(buf)); |
f0fca04e AT |
1936 | } |
1937 | ||
9361f839 | 1938 | void write_byte(int f, uchar c) |
182dca5c | 1939 | { |
20caffd2 | 1940 | write_buf(f, (char *)&c, 1); |
182dca5c AT |
1941 | } |
1942 | ||
4a19c3b2 | 1943 | void write_vstring(int f, const char *str, int len) |
46e99b09 WD |
1944 | { |
1945 | uchar lenbuf[3], *lb = lenbuf; | |
1946 | ||
1947 | if (len > 0x7F) { | |
1948 | if (len > 0x7FFF) { | |
1949 | rprintf(FERROR, | |
1950 | "attempting to send over-long vstring (%d > %d)\n", | |
1951 | len, 0x7FFF); | |
1952 | exit_cleanup(RERR_PROTOCOL); | |
1953 | } | |
1954 | *lb++ = len / 0x100 + 0x80; | |
1955 | } | |
1956 | *lb = len; | |
1957 | ||
20caffd2 | 1958 | write_buf(f, (char*)lenbuf, lb - lenbuf + 1); |
46e99b09 | 1959 | if (len) |
20caffd2 | 1960 | write_buf(f, str, len); |
46e99b09 WD |
1961 | } |
1962 | ||
8a65e0ce WD |
1963 | /* Send a file-list index using a byte-reduction method. */ |
1964 | void write_ndx(int f, int32 ndx) | |
1965 | { | |
1966 | static int32 prev_positive = -1, prev_negative = 1; | |
1967 | int32 diff, cnt = 0; | |
1968 | char b[6]; | |
1969 | ||
1970 | if (protocol_version < 30 || read_batch) { | |
1971 | write_int(f, ndx); | |
1972 | return; | |
1973 | } | |
1974 | ||
1975 | /* Send NDX_DONE as a single-byte 0 with no side effects. Send | |
1976 | * negative nums as a positive after sending a leading 0xFF. */ | |
1977 | if (ndx >= 0) { | |
1978 | diff = ndx - prev_positive; | |
1979 | prev_positive = ndx; | |
1980 | } else if (ndx == NDX_DONE) { | |
1981 | *b = 0; | |
20caffd2 | 1982 | write_buf(f, b, 1); |
8a65e0ce WD |
1983 | return; |
1984 | } else { | |
1985 | b[cnt++] = (char)0xFF; | |
1986 | ndx = -ndx; | |
1987 | diff = ndx - prev_negative; | |
1988 | prev_negative = ndx; | |
1989 | } | |
1990 | ||
1991 | /* A diff of 1 - 253 is sent as a one-byte diff; a diff of 254 - 32767 | |
1992 | * or 0 is sent as a 0xFE + a two-byte diff; otherwise we send 0xFE | |
1993 | * & all 4 bytes of the (non-negative) num with the high-bit set. */ | |
1994 | if (diff < 0xFE && diff > 0) | |
1995 | b[cnt++] = (char)diff; | |
1996 | else if (diff < 0 || diff > 0x7FFF) { | |
1997 | b[cnt++] = (char)0xFE; | |
1998 | b[cnt++] = (char)((ndx >> 24) | 0x80); | |
8a65e0ce | 1999 | b[cnt++] = (char)ndx; |
351e23ad WD |
2000 | b[cnt++] = (char)(ndx >> 8); |
2001 | b[cnt++] = (char)(ndx >> 16); | |
8a65e0ce WD |
2002 | } else { |
2003 | b[cnt++] = (char)0xFE; | |
2004 | b[cnt++] = (char)(diff >> 8); | |
2005 | b[cnt++] = (char)diff; | |
2006 | } | |
20caffd2 | 2007 | write_buf(f, b, cnt); |
8a65e0ce WD |
2008 | } |
2009 | ||
2010 | /* Receive a file-list index using a byte-reduction method. */ | |
2011 | int32 read_ndx(int f) | |
2012 | { | |
2013 | static int32 prev_positive = -1, prev_negative = 1; | |
2014 | int32 *prev_ptr, num; | |
2015 | char b[4]; | |
2016 | ||
2017 | if (protocol_version < 30) | |
2018 | return read_int(f); | |
2019 | ||
20caffd2 | 2020 | read_buf(f, b, 1); |
8a65e0ce | 2021 | if (CVAL(b, 0) == 0xFF) { |
20caffd2 | 2022 | read_buf(f, b, 1); |
8a65e0ce WD |
2023 | prev_ptr = &prev_negative; |
2024 | } else if (CVAL(b, 0) == 0) | |
2025 | return NDX_DONE; | |
2026 | else | |
2027 | prev_ptr = &prev_positive; | |
2028 | if (CVAL(b, 0) == 0xFE) { | |
20caffd2 | 2029 | read_buf(f, b, 2); |
8a65e0ce | 2030 | if (CVAL(b, 0) & 0x80) { |
351e23ad WD |
2031 | b[3] = CVAL(b, 0) & ~0x80; |
2032 | b[0] = b[1]; | |
20caffd2 | 2033 | read_buf(f, b+1, 2); |
351e23ad | 2034 | num = IVAL(b, 0); |
8a65e0ce | 2035 | } else |
351e23ad | 2036 | num = (UVAL(b,0)<<8) + UVAL(b,1) + *prev_ptr; |
8a65e0ce | 2037 | } else |
351e23ad | 2038 | num = UVAL(b, 0) + *prev_ptr; |
8a65e0ce WD |
2039 | *prev_ptr = num; |
2040 | if (prev_ptr == &prev_negative) | |
2041 | num = -num; | |
2042 | return num; | |
2043 | } | |
2044 | ||
67b8f3df WD |
2045 | /* Read a line of up to bufsiz-1 characters into buf. Strips |
2046 | * the (required) trailing newline and all carriage returns. | |
2047 | * Returns 1 for success; 0 for I/O error or truncation. */ | |
20caffd2 | 2048 | int read_line_old(int fd, char *buf, size_t bufsiz) |
f0fca04e | 2049 | { |
67b8f3df WD |
2050 | bufsiz--; /* leave room for the null */ |
2051 | while (bufsiz > 0) { | |
20caffd2 WD |
2052 | assert(fd != iobuf.in_fd); |
2053 | if (safe_read(fd, buf, 1) == 0) | |
2054 | return 0; | |
2055 | if (*buf == '\0') | |
914cc65c | 2056 | return 0; |
20caffd2 | 2057 | if (*buf == '\n') |
f0fca04e | 2058 | break; |
20caffd2 | 2059 | if (*buf != '\r') { |
f0fca04e | 2060 | buf++; |
67b8f3df | 2061 | bufsiz--; |
f0fca04e AT |
2062 | } |
2063 | } | |
6ed6d7f5 | 2064 | *buf = '\0'; |
67b8f3df | 2065 | return bufsiz > 0; |
f0fca04e AT |
2066 | } |
2067 | ||
f0fca04e AT |
2068 | void io_printf(int fd, const char *format, ...) |
2069 | { | |
d62bcc17 | 2070 | va_list ap; |
33544bf4 | 2071 | char buf[BIGPATHBUFLEN]; |
f0fca04e | 2072 | int len; |
3151cbae | 2073 | |
f0fca04e | 2074 | va_start(ap, format); |
3151cbae | 2075 | len = vsnprintf(buf, sizeof buf, format, ap); |
f0fca04e AT |
2076 | va_end(ap); |
2077 | ||
f89b9368 WD |
2078 | if (len < 0) |
2079 | exit_cleanup(RERR_STREAMIO); | |
f0fca04e | 2080 | |
33544bf4 WD |
2081 | if (len > (int)sizeof buf) { |
2082 | rprintf(FERROR, "io_printf() was too long for the buffer.\n"); | |
2083 | exit_cleanup(RERR_STREAMIO); | |
2084 | } | |
2085 | ||
f0fca04e AT |
2086 | write_sbuf(fd, buf); |
2087 | } | |
8d9dc9f9 | 2088 | |
20caffd2 WD |
2089 | /* Setup for multiplexing a MSG_* stream with the data stream. */ |
2090 | void io_start_multiplex_out(int fd) | |
8d9dc9f9 | 2091 | { |
705132bc WD |
2092 | io_flush(FULL_FLUSH); |
2093 | ||
20caffd2 WD |
2094 | if (msgs2stderr && DEBUG_GTE(IO, 2)) |
2095 | rprintf(FINFO, "[%s] io_start_multiplex_out(%d)\n", who_am_i(), fd); | |
8d9dc9f9 | 2096 | |
20caffd2 WD |
2097 | iobuf.out_empty_len = 4; /* See also OUT_MULTIPLEXED */ |
2098 | io_start_buffering_out(fd); | |
2099 | ||
2100 | iobuf.raw_data_header_pos = iobuf.out.pos + iobuf.out.len; | |
2101 | iobuf.out.len += 4; | |
8d9dc9f9 AT |
2102 | } |
2103 | ||
20caffd2 WD |
2104 | /* Setup for multiplexing a MSG_* stream with the data stream. */ |
2105 | void io_start_multiplex_in(int fd) | |
8d9dc9f9 | 2106 | { |
20caffd2 WD |
2107 | if (msgs2stderr && DEBUG_GTE(IO, 2)) |
2108 | rprintf(FINFO, "[%s] io_start_multiplex_in(%d)\n", who_am_i(), fd); | |
2109 | ||
2110 | iobuf.in_multiplexed = True; /* See also IN_MULTIPLEXED */ | |
2111 | io_start_buffering_in(fd); | |
8d9dc9f9 AT |
2112 | } |
2113 | ||
8e6b4ddb | 2114 | int io_end_multiplex_in(int mode) |
7f459268 | 2115 | { |
8e6b4ddb WD |
2116 | int ret = iobuf.in_multiplexed ? iobuf.in_fd : -1; |
2117 | ||
705132bc WD |
2118 | if (msgs2stderr && DEBUG_GTE(IO, 2)) |
2119 | rprintf(FINFO, "[%s] io_end_multiplex_in(mode=%d)\n", who_am_i(), mode); | |
20caffd2 WD |
2120 | |
2121 | iobuf.in_multiplexed = False; | |
705132bc WD |
2122 | if (mode == MPLX_SWITCHING) |
2123 | iobuf.raw_input_ends_before = 0; | |
2124 | else | |
2125 | assert(iobuf.raw_input_ends_before == 0); | |
2126 | if (mode != MPLX_TO_BUFFERED) | |
2127 | io_end_buffering_in(mode); | |
8e6b4ddb WD |
2128 | |
2129 | return ret; | |
7f459268 WD |
2130 | } |
2131 | ||
8e6b4ddb | 2132 | int io_end_multiplex_out(int mode) |
554e0a8d | 2133 | { |
8e6b4ddb WD |
2134 | int ret = iobuf.out_empty_len ? iobuf.out_fd : -1; |
2135 | ||
705132bc WD |
2136 | if (msgs2stderr && DEBUG_GTE(IO, 2)) |
2137 | rprintf(FINFO, "[%s] io_end_multiplex_out(mode=%d)\n", who_am_i(), mode); | |
2138 | ||
2139 | if (mode != MPLX_TO_BUFFERED) | |
2140 | io_end_buffering_out(mode); | |
2141 | else | |
2142 | io_flush(FULL_FLUSH); | |
20caffd2 | 2143 | |
705132bc | 2144 | iobuf.out.len = 0; |
20caffd2 | 2145 | iobuf.out_empty_len = 0; |
8e6b4ddb WD |
2146 | |
2147 | return ret; | |
554e0a8d AT |
2148 | } |
2149 | ||
b9f592fb WD |
2150 | void start_write_batch(int fd) |
2151 | { | |
2152 | /* Some communication has already taken place, but we don't | |
2153 | * enable batch writing until here so that we can write a | |
2154 | * canonical record of the communication even though the | |
2155 | * actual communication so far depends on whether a daemon | |
2156 | * is involved. */ | |
2157 | write_int(batch_fd, protocol_version); | |
71456d30 WD |
2158 | if (protocol_version >= 30) |
2159 | write_byte(batch_fd, inc_recurse); | |
b9f592fb | 2160 | write_int(batch_fd, checksum_seed); |
b9f592fb WD |
2161 | |
2162 | if (am_sender) | |
2163 | write_batch_monitor_out = fd; | |
2164 | else | |
2165 | write_batch_monitor_in = fd; | |
2166 | } | |
2167 | ||
2168 | void stop_write_batch(void) | |
2169 | { | |
2170 | write_batch_monitor_out = -1; | |
2171 | write_batch_monitor_in = -1; | |
2172 | } |