Annotation of embedaddon/rsync/sender.c, revision 1.1.1.2
1.1 misho 1: /*
2: * Routines only used by the sending process.
3: *
4: * Copyright (C) 1996 Andrew Tridgell
5: * Copyright (C) 1996 Paul Mackerras
1.1.1.2 ! misho 6: * Copyright (C) 2003-2013 Wayne Davison
1.1 misho 7: *
8: * This program is free software; you can redistribute it and/or modify
9: * it under the terms of the GNU General Public License as published by
10: * the Free Software Foundation; either version 3 of the License, or
11: * (at your option) any later version.
12: *
13: * This program is distributed in the hope that it will be useful,
14: * but WITHOUT ANY WARRANTY; without even the implied warranty of
15: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16: * GNU General Public License for more details.
17: *
18: * You should have received a copy of the GNU General Public License along
19: * with this program; if not, visit the http://fsf.org website.
20: */
21:
22: #include "rsync.h"
1.1.1.2 ! misho 23: #include "inums.h"
1.1 misho 24:
25: extern int do_xfers;
26: extern int am_server;
27: extern int am_daemon;
28: extern int inc_recurse;
29: extern int log_before_transfer;
30: extern int stdout_format_has_i;
31: extern int logfile_format_has_i;
32: extern int csum_length;
33: extern int append_mode;
34: extern int io_error;
1.1.1.2 ! misho 35: extern int flist_eof;
1.1 misho 36: extern int allowed_lull;
37: extern int preserve_xattrs;
38: extern int protocol_version;
39: extern int remove_source_files;
40: extern int updating_basis_file;
41: extern int make_backups;
42: extern int inplace;
43: extern int batch_fd;
44: extern int write_batch;
1.1.1.2 ! misho 45: extern int file_old_total;
1.1 misho 46: extern struct stats stats;
47: extern struct file_list *cur_flist, *first_flist, *dir_flist;
48:
1.1.1.2 ! misho 49: BOOL extra_flist_sending_enabled;
! 50:
1.1 misho 51: /**
52: * @file
53: *
54: * The sender gets checksums from the generator, calculates deltas,
55: * and transmits them to the receiver. The sender process runs on the
56: * machine holding the source files.
57: **/
58:
59: /**
60: * Receive the checksums for a buffer
61: **/
62: static struct sum_struct *receive_sums(int f)
63: {
64: struct sum_struct *s;
65: int32 i;
1.1.1.2 ! misho 66: int lull_mod = protocol_version >= 31 ? 0 : allowed_lull * 5;
1.1 misho 67: OFF_T offset = 0;
68:
69: if (!(s = new(struct sum_struct)))
70: out_of_memory("receive_sums");
71:
72: read_sum_head(f, s);
73:
74: s->sums = NULL;
75:
1.1.1.2 ! misho 76: if (DEBUG_GTE(DELTASUM, 3)) {
! 77: rprintf(FINFO, "count=%s n=%ld rem=%ld\n",
! 78: big_num(s->count), (long)s->blength, (long)s->remainder);
1.1 misho 79: }
80:
81: if (append_mode > 0) {
82: s->flength = (OFF_T)s->count * s->blength;
83: if (s->remainder)
84: s->flength -= s->blength - s->remainder;
85: return s;
86: }
87:
88: if (s->count == 0)
89: return(s);
90:
91: if (!(s->sums = new_array(struct sum_buf, s->count)))
92: out_of_memory("receive_sums");
93:
94: for (i = 0; i < s->count; i++) {
95: s->sums[i].sum1 = read_int(f);
96: read_buf(f, s->sums[i].sum2, s->s2length);
97:
98: s->sums[i].offset = offset;
99: s->sums[i].flags = 0;
100:
101: if (i == s->count-1 && s->remainder != 0)
102: s->sums[i].len = s->remainder;
103: else
104: s->sums[i].len = s->blength;
105: offset += s->sums[i].len;
106:
1.1.1.2 ! misho 107: if (lull_mod && !(i % lull_mod))
! 108: maybe_send_keepalive(time(NULL), True);
1.1 misho 109:
1.1.1.2 ! misho 110: if (DEBUG_GTE(DELTASUM, 3)) {
1.1 misho 111: rprintf(FINFO,
1.1.1.2 ! misho 112: "chunk[%d] len=%d offset=%s sum1=%08x\n",
! 113: i, s->sums[i].len, big_num(s->sums[i].offset),
1.1 misho 114: s->sums[i].sum1);
115: }
116: }
117:
118: s->flength = offset;
119:
120: return s;
121: }
122:
123: void successful_send(int ndx)
124: {
125: char fname[MAXPATHLEN];
1.1.1.2 ! misho 126: char *failed_op;
1.1 misho 127: struct file_struct *file;
128: struct file_list *flist;
1.1.1.2 ! misho 129: STRUCT_STAT st;
1.1 misho 130:
131: if (!remove_source_files)
132: return;
133:
134: flist = flist_for_ndx(ndx, "successful_send");
135: file = flist->files[ndx - flist->ndx_start];
136: if (!change_pathname(file, NULL, 0))
137: return;
138: f_name(file, fname);
139:
1.1.1.2 ! misho 140: if (do_lstat(fname, &st) < 0) {
! 141: failed_op = "re-lstat";
! 142: goto failed;
! 143: }
! 144:
! 145: if (st.st_size != F_LENGTH(file) || st.st_mtime != file->modtime
! 146: #ifdef ST_MTIME_NSEC
! 147: || (NSEC_BUMP(file) && (uint32)st.ST_MTIME_NSEC != F_MOD_NSEC(file))
! 148: #endif
! 149: ) {
! 150: rprintf(FERROR, "ERROR: Skipping sender remove for changed file: %s\n", fname);
! 151: return;
! 152: }
! 153:
! 154: if (do_unlink(fname) < 0) {
! 155: failed_op = "remove";
! 156: failed:
! 157: if (errno == ENOENT)
! 158: rprintf(FINFO, "sender file already removed: %s\n", fname);
! 159: else
! 160: rsyserr(FERROR, errno, "sender failed to %s %s", failed_op, fname);
! 161: } else {
! 162: if (INFO_GTE(REMOVE, 1))
1.1 misho 163: rprintf(FINFO, "sender removed %s\n", fname);
1.1.1.2 ! misho 164: }
1.1 misho 165: }
166:
167: static void write_ndx_and_attrs(int f_out, int ndx, int iflags,
168: const char *fname, struct file_struct *file,
169: uchar fnamecmp_type, char *buf, int len)
170: {
171: write_ndx(f_out, ndx);
172: if (protocol_version < 29)
173: return;
174: write_shortint(f_out, iflags);
175: if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
176: write_byte(f_out, fnamecmp_type);
177: if (iflags & ITEM_XNAME_FOLLOWS)
178: write_vstring(f_out, buf, len);
179: #ifdef SUPPORT_XATTRS
1.1.1.2 ! misho 180: if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
! 181: && (protocol_version < 31 || !BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE)))
1.1 misho 182: send_xattr_request(fname, file, f_out);
183: #endif
184: }
185:
186: void send_files(int f_in, int f_out)
187: {
188: int fd = -1;
189: struct sum_struct *s;
190: struct map_struct *mbuf = NULL;
191: STRUCT_STAT st;
192: char fname[MAXPATHLEN], xname[MAXPATHLEN];
193: const char *path, *slash;
194: uchar fnamecmp_type;
195: int iflags, xlen;
196: struct file_struct *file;
197: int phase = 0, max_phase = protocol_version >= 29 ? 2 : 1;
198: int itemizing = am_server ? logfile_format_has_i : stdout_format_has_i;
199: enum logcode log_code = log_before_transfer ? FLOG : FINFO;
200: int f_xfer = write_batch < 0 ? batch_fd : f_out;
201: int save_io_error = io_error;
202: int ndx, j;
203:
1.1.1.2 ! misho 204: if (DEBUG_GTE(SEND, 1))
1.1 misho 205: rprintf(FINFO, "send_files starting\n");
206:
207: while (1) {
1.1.1.2 ! misho 208: if (inc_recurse) {
! 209: send_extra_file_list(f_out, MIN_FILECNT_LOOKAHEAD);
! 210: extra_flist_sending_enabled = !flist_eof;
! 211: }
1.1 misho 212:
213: /* This call also sets cur_flist. */
1.1.1.2 ! misho 214: ndx = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type,
1.1 misho 215: xname, &xlen);
1.1.1.2 ! misho 216: extra_flist_sending_enabled = False;
! 217:
1.1 misho 218: if (ndx == NDX_DONE) {
1.1.1.2 ! misho 219: if (!am_server && INFO_GTE(PROGRESS, 2) && cur_flist) {
! 220: set_current_file_index(NULL, 0);
! 221: end_progress(0);
! 222: }
1.1 misho 223: if (inc_recurse && first_flist) {
1.1.1.2 ! misho 224: file_old_total -= first_flist->used;
1.1 misho 225: flist_free(first_flist);
226: if (first_flist) {
1.1.1.2 ! misho 227: if (first_flist == cur_flist)
! 228: file_old_total = cur_flist->used;
1.1 misho 229: write_ndx(f_out, NDX_DONE);
230: continue;
231: }
232: }
233: if (++phase > max_phase)
234: break;
1.1.1.2 ! misho 235: if (DEBUG_GTE(SEND, 1))
1.1 misho 236: rprintf(FINFO, "send_files phase=%d\n", phase);
237: write_ndx(f_out, NDX_DONE);
238: continue;
239: }
240:
241: if (inc_recurse)
1.1.1.2 ! misho 242: send_extra_file_list(f_out, MIN_FILECNT_LOOKAHEAD);
1.1 misho 243:
244: if (ndx - cur_flist->ndx_start >= 0)
245: file = cur_flist->files[ndx - cur_flist->ndx_start];
246: else
247: file = dir_flist->files[cur_flist->parent_ndx];
248: if (F_PATHNAME(file)) {
249: path = F_PATHNAME(file);
250: slash = "/";
251: } else {
252: path = slash = "";
253: }
254: if (!change_pathname(file, NULL, 0))
255: continue;
256: f_name(file, fname);
257:
1.1.1.2 ! misho 258: if (DEBUG_GTE(SEND, 1))
1.1 misho 259: rprintf(FINFO, "send_files(%d, %s%s%s)\n", ndx, path,slash,fname);
260:
261: #ifdef SUPPORT_XATTRS
1.1.1.2 ! misho 262: if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
! 263: && (protocol_version < 31 || !BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE)))
1.1 misho 264: recv_xattr_request(file, f_in);
265: #endif
266:
267: if (!(iflags & ITEM_TRANSFER)) {
268: maybe_log_item(file, iflags, itemizing, xname);
269: write_ndx_and_attrs(f_out, ndx, iflags, fname, file,
270: fnamecmp_type, xname, xlen);
1.1.1.2 ! misho 271: if (iflags & ITEM_IS_NEW) {
! 272: stats.created_files++;
! 273: if (S_ISREG(file->mode)) {
! 274: /* Nothing further to count. */
! 275: } else if (S_ISDIR(file->mode))
! 276: stats.created_dirs++;
! 277: #ifdef SUPPORT_LINKS
! 278: else if (S_ISLNK(file->mode))
! 279: stats.created_symlinks++;
! 280: #endif
! 281: else if (IS_DEVICE(file->mode))
! 282: stats.created_devices++;
! 283: else
! 284: stats.created_specials++;
! 285: }
1.1 misho 286: continue;
287: }
288: if (phase == 2) {
289: rprintf(FERROR,
290: "got transfer request in phase 2 [%s]\n",
291: who_am_i());
292: exit_cleanup(RERR_PROTOCOL);
293: }
294:
295: if (file->flags & FLAG_FILE_SENT) {
296: if (csum_length == SHORT_SUM_LENGTH) {
297: /* For inplace: redo phase turns off the backup
298: * flag so that we do a regular inplace send. */
299: make_backups = -make_backups;
300: append_mode = -append_mode;
301: csum_length = SUM_LENGTH;
302: }
303: } else {
304: if (csum_length != SHORT_SUM_LENGTH) {
305: make_backups = -make_backups;
306: append_mode = -append_mode;
307: csum_length = SHORT_SUM_LENGTH;
308: }
1.1.1.2 ! misho 309: if (iflags & ITEM_IS_NEW)
! 310: stats.created_files++;
1.1 misho 311: }
312:
313: updating_basis_file = inplace && (protocol_version >= 29
314: ? fnamecmp_type == FNAMECMP_FNAME : make_backups <= 0);
315:
1.1.1.2 ! misho 316: if (!am_server && INFO_GTE(PROGRESS, 1))
1.1 misho 317: set_current_file_index(file, ndx);
1.1.1.2 ! misho 318: stats.xferred_files++;
1.1 misho 319: stats.total_transferred_size += F_LENGTH(file);
320:
1.1.1.2 ! misho 321: if (!log_before_transfer)
! 322: remember_initial_stats();
! 323:
1.1 misho 324: if (!do_xfers) { /* log the transfer */
1.1.1.2 ! misho 325: log_item(FCLIENT, file, iflags, NULL);
1.1 misho 326: write_ndx_and_attrs(f_out, ndx, iflags, fname, file,
327: fnamecmp_type, xname, xlen);
328: continue;
329: }
330:
331: if (!(s = receive_sums(f_in))) {
332: io_error |= IOERR_GENERAL;
333: rprintf(FERROR_XFER, "receive_sums failed\n");
334: exit_cleanup(RERR_PROTOCOL);
335: }
336:
337: fd = do_open(fname, O_RDONLY, 0);
338: if (fd == -1) {
339: if (errno == ENOENT) {
340: enum logcode c = am_daemon
341: && protocol_version < 28 ? FERROR
342: : FWARNING;
343: io_error |= IOERR_VANISHED;
344: rprintf(c, "file has vanished: %s\n",
345: full_fname(fname));
346: } else {
347: io_error |= IOERR_GENERAL;
348: rsyserr(FERROR_XFER, errno,
349: "send_files failed to open %s",
350: full_fname(fname));
351: }
352: free_sums(s);
353: if (protocol_version >= 30)
354: send_msg_int(MSG_NO_SEND, ndx);
355: continue;
356: }
357:
358: /* map the local file */
359: if (do_fstat(fd, &st) != 0) {
360: io_error |= IOERR_GENERAL;
361: rsyserr(FERROR_XFER, errno, "fstat failed");
362: free_sums(s);
363: close(fd);
1.1.1.2 ! misho 364: exit_cleanup(RERR_FILEIO);
1.1 misho 365: }
366:
367: if (st.st_size) {
368: int32 read_size = MAX(s->blength * 3, MAX_MAP_SIZE);
369: mbuf = map_file(fd, st.st_size, read_size, s->blength);
370: } else
371: mbuf = NULL;
372:
1.1.1.2 ! misho 373: if (DEBUG_GTE(DELTASUM, 2)) {
! 374: rprintf(FINFO, "send_files mapped %s%s%s of size %s\n",
! 375: path,slash,fname, big_num(st.st_size));
1.1 misho 376: }
377:
378: write_ndx_and_attrs(f_out, ndx, iflags, fname, file,
379: fnamecmp_type, xname, xlen);
380: write_sum_head(f_xfer, s);
381:
1.1.1.2 ! misho 382: if (DEBUG_GTE(DELTASUM, 2))
1.1 misho 383: rprintf(FINFO, "calling match_sums %s%s%s\n", path,slash,fname);
384:
385: if (log_before_transfer)
1.1.1.2 ! misho 386: log_item(FCLIENT, file, iflags, NULL);
! 387: else if (!am_server && INFO_GTE(NAME, 1) && INFO_EQ(PROGRESS, 1))
1.1 misho 388: rprintf(FCLIENT, "%s\n", fname);
389:
390: set_compression(fname);
391:
392: match_sums(f_xfer, s, mbuf, st.st_size);
1.1.1.2 ! misho 393: if (INFO_GTE(PROGRESS, 1))
1.1 misho 394: end_progress(st.st_size);
395:
1.1.1.2 ! misho 396: log_item(log_code, file, iflags, NULL);
1.1 misho 397:
398: if (mbuf) {
399: j = unmap_file(mbuf);
400: if (j) {
401: io_error |= IOERR_GENERAL;
402: rsyserr(FERROR_XFER, j,
403: "read errors mapping %s",
404: full_fname(fname));
405: }
406: }
407: close(fd);
408:
409: free_sums(s);
410:
1.1.1.2 ! misho 411: if (DEBUG_GTE(SEND, 1))
1.1 misho 412: rprintf(FINFO, "sender finished %s%s%s\n", path,slash,fname);
413:
414: /* Flag that we actually sent this entry. */
415: file->flags |= FLAG_FILE_SENT;
416: }
417: if (make_backups < 0)
418: make_backups = -make_backups;
419:
420: if (io_error != save_io_error && protocol_version >= 30)
421: send_msg_int(MSG_IO_ERROR, io_error);
422:
1.1.1.2 ! misho 423: if (DEBUG_GTE(SEND, 1))
1.1 misho 424: rprintf(FINFO, "send files finished\n");
425:
426: match_report();
427:
428: write_ndx(f_out, NDX_DONE);
429: }
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