Line data Source code
1 : #include "../../burp.h"
2 : #include "../../alloc.h"
3 : #include "../../asfd.h"
4 : #include "../../async.h"
5 : #include "../../bu.h"
6 : #include "../../cmd.h"
7 : #include "../../cntr.h"
8 : #include "../../handy.h"
9 : #include "../../hexmap.h"
10 : #include "../../log.h"
11 : #include "../../prepend.h"
12 : #include "../../protocol1/handy.h"
13 : #include "../../server/protocol1/backup_phase4.h"
14 : #include "../../server/protocol1/link.h"
15 : #include "../../server/protocol1/zlibio.h"
16 : #include "../../server/protocol2/restore.h"
17 : #include "../../sbuf.h"
18 : #include "../../slist.h"
19 : #include "../sdirs.h"
20 : #include "dpth.h"
21 : #include "restore.h"
22 :
23 : #include <librsync.h>
24 :
25 0 : static int create_zero_length_file(const char *path)
26 : {
27 0 : int ret=0;
28 : struct fzp *dest;
29 0 : if(!(dest=fzp_open(path, "wb")))
30 0 : ret=-1;
31 0 : ret|=fzp_close(&dest);
32 0 : return ret;
33 : }
34 :
35 0 : static int inflate_or_link_oldfile(struct asfd *asfd, const char *oldpath,
36 : const char *infpath, struct conf **cconfs, int compression)
37 : {
38 0 : int ret=0;
39 : struct stat statp;
40 :
41 0 : if(lstat(oldpath, &statp))
42 : {
43 0 : logp("could not lstat %s\n", oldpath);
44 0 : return -1;
45 : }
46 :
47 0 : if(dpth_protocol1_is_compressed(compression, oldpath))
48 : {
49 : //logp("inflating...\n");
50 :
51 0 : if(!statp.st_size)
52 : {
53 : // Empty file - cannot inflate.
54 0 : logp("asked to inflate zero length file: %s\n",
55 : oldpath);
56 0 : return create_zero_length_file(infpath);
57 : }
58 :
59 0 : if((ret=zlib_inflate(asfd, oldpath, infpath, get_cntr(cconfs))))
60 0 : logp("zlib_inflate returned: %d\n", ret);
61 : }
62 : else
63 : {
64 : // Not compressed - just hard link it.
65 0 : if(do_link(oldpath, infpath, &statp, cconfs,
66 : 1 /* allow overwrite of infpath */))
67 : return -1;
68 : }
69 0 : return ret;
70 : }
71 :
72 4 : static int send_file(struct asfd *asfd, struct sbuf *sb,
73 : int patches, const char *best, struct cntr *cntr)
74 : {
75 4 : int ret=-1;
76 : struct BFILE bfd;
77 4 : uint64_t bytes=0; // Unused.
78 :
79 4 : bfile_init(&bfd, 0, cntr);
80 4 : if(bfd.open_for_send(&bfd, asfd, best, sb->winattr,
81 : 1 /* no O_NOATIME */, cntr, PROTO_1)) return -1;
82 : //logp("sending: %s\n", best);
83 4 : if(asfd->write(asfd, &sb->path))
84 : ret=-1;
85 4 : else if(patches)
86 : {
87 : // If we did some patches, the resulting file
88 : // is not gzipped. Gzip it during the send.
89 0 : ret=send_whole_file_gzl(asfd, sb->protocol1->datapth.buf,
90 : 1, &bytes, NULL, cntr, 9, &bfd, NULL, 0);
91 : }
92 : else
93 : {
94 : // If it was encrypted, it may or may not have been compressed
95 : // before encryption. Send it as it as, and let the client
96 : // sort it out.
97 4 : if(sbuf_is_encrypted(sb))
98 : {
99 2 : ret=send_whole_filel(asfd,
100 : #ifdef HAVE_WIN32
101 : sb->path.cmd
102 : #endif
103 2 : sb->protocol1->datapth.buf,
104 : 1, &bytes, cntr, &bfd, NULL, 0);
105 : }
106 : // It might have been stored uncompressed. Gzip it during
107 : // the send. If the client knew what kind of file it would be
108 : // receiving, this step could disappear.
109 2 : else if(!dpth_protocol1_is_compressed(sb->compression,
110 2 : sb->protocol1->datapth.buf))
111 : {
112 2 : ret=send_whole_file_gzl(asfd,
113 2 : sb->protocol1->datapth.buf, 1, &bytes,
114 : NULL, cntr, 9, &bfd, NULL, 0);
115 : }
116 : else
117 : {
118 : // If we did not do some patches, the resulting
119 : // file might already be gzipped. Send it as it is.
120 0 : ret=send_whole_filel(asfd,
121 : #ifdef HAVE_WIN32
122 : sb->path.cmd
123 : #endif
124 0 : sb->protocol1->datapth.buf,
125 : 1, &bytes, cntr, &bfd, NULL, 0);
126 : }
127 : }
128 4 : bfd.close(&bfd, asfd);
129 4 : return ret;
130 : }
131 :
132 : #ifndef UTEST
133 : static
134 : #endif
135 5 : int verify_file(struct asfd *asfd, struct sbuf *sb,
136 : int patches, const char *best, struct cntr *cntr)
137 : {
138 : MD5_CTX md5;
139 5 : int b=0;
140 5 : const char *cp=NULL;
141 5 : const char *newsum=NULL;
142 : uint8_t in[ZCHUNK];
143 : uint8_t checksum[MD5_DIGEST_LENGTH];
144 5 : uint64_t cbytes=0;
145 5 : struct fzp *fzp=NULL;
146 :
147 5 : if(!sb->endfile.buf
148 5 : || !(cp=strrchr(sb->endfile.buf, ':')))
149 : {
150 1 : logw(asfd, cntr,
151 1 : "%s has no md5sum!\n", sb->protocol1->datapth.buf);
152 1 : return 0;
153 : }
154 4 : cp++;
155 4 : if(!MD5_Init(&md5))
156 : {
157 0 : logp("MD5_Init() failed\n");
158 0 : return -1;
159 : }
160 4 : if(patches
161 4 : || sb->path.cmd==CMD_ENC_FILE
162 4 : || sb->path.cmd==CMD_ENC_METADATA
163 4 : || sb->path.cmd==CMD_EFS_FILE
164 4 : || sb->path.cmd==CMD_ENC_VSS
165 4 : || (!patches && !dpth_protocol1_is_compressed(sb->compression, best)))
166 2 : fzp=fzp_open(best, "rb");
167 : else
168 2 : fzp=fzp_gzopen(best, "rb");
169 :
170 4 : if(!fzp)
171 : {
172 1 : logw(asfd, cntr, "could not open %s\n", best);
173 1 : return 0;
174 : }
175 5 : while((b=fzp_read(fzp, in, ZCHUNK))>0)
176 : {
177 2 : cbytes+=b;
178 2 : if(!MD5_Update(&md5, in, b))
179 : {
180 0 : logp("MD5_Update() failed\n");
181 0 : fzp_close(&fzp);
182 0 : return -1;
183 : }
184 : }
185 3 : if(!fzp_eof(fzp))
186 : {
187 1 : logw(asfd, cntr, "error while reading %s\n", best);
188 1 : fzp_close(&fzp);
189 1 : return 0;
190 : }
191 2 : fzp_close(&fzp);
192 2 : if(!MD5_Final(checksum, &md5))
193 : {
194 0 : logp("MD5_Final() failed\n");
195 0 : return -1;
196 : }
197 2 : newsum=bytes_to_md5str(checksum);
198 :
199 2 : if(strcmp(newsum, cp))
200 : {
201 1 : logp("%s %s\n", newsum, cp);
202 1 : logw(asfd, cntr, "md5sum for '%s (%s)' did not match!\n",
203 1 : sb->path.buf, sb->protocol1->datapth.buf);
204 1 : logp("md5sum for '%s (%s)' did not match!\n",
205 1 : sb->path.buf, sb->protocol1->datapth.buf);
206 1 : return 0;
207 : }
208 :
209 : // Just send the file name to the client, so that it can show cntr.
210 1 : if(asfd->write(asfd, &sb->path)) return -1;
211 1 : return 0;
212 : }
213 :
214 4 : static int process_data_dir_file(struct asfd *asfd,
215 : struct bu *bu, struct bu *b, const char *path,
216 : struct sbuf *sb, enum action act, struct sdirs *sdirs,
217 : struct conf **cconfs)
218 : {
219 4 : int ret=-1;
220 4 : int patches=0;
221 4 : char *dpath=NULL;
222 : struct stat dstatp;
223 4 : const char *tmp=NULL;
224 4 : const char *best=NULL;
225 : static char *tmppath1=NULL;
226 : static char *tmppath2=NULL;
227 4 : struct cntr *cntr=NULL;
228 4 : if(cconfs) cntr=get_cntr(cconfs);
229 :
230 4 : if((!tmppath1 && !(tmppath1=prepend_s(sdirs->client, "tmp1")))
231 4 : || (!tmppath2 && !(tmppath2=prepend_s(sdirs->client, "tmp2"))))
232 : goto end;
233 :
234 4 : best=path;
235 4 : tmp=tmppath1;
236 : // Now go down the list, applying any deltas.
237 4 : for(b=b->prev; b && b->next!=bu; b=b->prev)
238 : {
239 0 : free_w(&dpath);
240 0 : if(!(dpath=prepend_s(b->delta, sb->protocol1->datapth.buf)))
241 : goto end;
242 :
243 0 : if(lstat(dpath, &dstatp) || !S_ISREG(dstatp.st_mode))
244 0 : continue;
245 :
246 0 : if(!patches)
247 : {
248 : // Need to gunzip the first one.
249 0 : if(inflate_or_link_oldfile(asfd, best, tmp,
250 : cconfs, sb->compression))
251 : {
252 0 : logw(asfd, cntr,
253 : "problem when inflating %s\n", best);
254 0 : ret=0;
255 : goto end;
256 : }
257 0 : best=tmp;
258 0 : if(tmp==tmppath1) tmp=tmppath2;
259 : else tmp=tmppath1;
260 : }
261 :
262 0 : if(do_patch(best, dpath, tmp,
263 : 0 /* do not gzip the result */,
264 : sb->compression /* from the manifest */))
265 : {
266 0 : logw(asfd, cntr, "problem when patching %s with %s\n", path, b->timestamp);
267 0 : ret=0;
268 : goto end;
269 : }
270 :
271 0 : best=tmp;
272 0 : if(tmp==tmppath1) tmp=tmppath2;
273 : else tmp=tmppath1;
274 0 : unlink(tmp);
275 0 : patches++;
276 : }
277 :
278 4 : switch(act)
279 : {
280 : case ACTION_RESTORE:
281 4 : if(send_file(asfd, sb, patches, best, cntr))
282 : goto end;
283 : break;
284 : case ACTION_VERIFY:
285 0 : if(verify_file(asfd, sb, patches, best, cntr))
286 : goto end;
287 : break;
288 : default:
289 0 : logp("Unknown action: %d\n", act);
290 : goto end;
291 : }
292 4 : cntr_add(cntr, sb->path.cmd, 0);
293 4 : cntr_add_bytes(cntr, strtoull(sb->endfile.buf, NULL, 10));
294 :
295 4 : ret=0;
296 : end:
297 4 : free_w(&dpath);
298 4 : free_w(&tmppath1);
299 4 : free_w(&tmppath2);
300 4 : return ret;
301 : }
302 :
303 : // a = length of struct bu array
304 : // i = position to restore from
305 : #ifndef UTEST
306 : static
307 : #endif
308 5 : int restore_file(struct asfd *asfd, struct bu *bu,
309 : struct sbuf *sb, enum action act,
310 : struct sdirs *sdirs, struct conf **cconfs)
311 : {
312 5 : int ret=-1;
313 5 : char *path=NULL;
314 : struct bu *b;
315 5 : struct bu *hlwarn=NULL;
316 : struct stat statp;
317 5 : struct cntr *cntr=NULL;
318 5 : if(cconfs) cntr=get_cntr(cconfs);
319 :
320 : // Go up the array until we find the file in the data directory.
321 10 : for(b=bu; b; b=b->next)
322 : {
323 4 : free_w(&path);
324 4 : if(!(path=prepend_s(b->data, sb->protocol1->datapth.buf)))
325 : goto end;
326 :
327 8 : if(lstat(path, &statp) || !S_ISREG(statp.st_mode))
328 0 : continue;
329 :
330 4 : if(b!=bu && (bu->flags & BU_HARDLINKED)) hlwarn=b;
331 :
332 4 : if(process_data_dir_file(asfd, bu, b,
333 : path, sb, act, sdirs, cconfs))
334 : goto end;
335 :
336 : // This warning must be done after everything else,
337 : // Because the client does not expect another cmd after
338 : // the warning.
339 4 : if(hlwarn) logw(asfd, cntr, "restore found %s in %s\n",
340 : sb->path.buf, hlwarn->basename);
341 : ret=0; // All OK.
342 : break;
343 : }
344 :
345 5 : if(!b)
346 : {
347 1 : logw(asfd, cntr, "restore could not find %s (%s)\n",
348 1 : sb->path.buf, sb->protocol1->datapth.buf);
349 1 : ret=0; // Carry on to subsequent files.
350 : }
351 : end:
352 5 : free_w(&path);
353 5 : return ret;
354 : }
355 :
356 10 : int restore_sbuf_protocol1(struct asfd *asfd, struct sbuf *sb, struct bu *bu,
357 : enum action act, struct sdirs *sdirs, struct conf **cconfs)
358 : {
359 10 : if((sb->protocol1->datapth.buf
360 4 : && asfd->write(asfd, &(sb->protocol1->datapth)))
361 10 : || asfd->write(asfd, &sb->attr))
362 : return -1;
363 10 : else if(sbuf_is_filedata(sb)
364 6 : || sbuf_is_vssdata(sb))
365 : {
366 4 : if(!sb->protocol1->datapth.buf)
367 : {
368 0 : logw(asfd, get_cntr(cconfs),
369 : "Got filedata entry with no datapth: %c:%s\n",
370 0 : sb->path.cmd, sb->path.buf);
371 0 : return 0;
372 : }
373 4 : return restore_file(asfd, bu, sb, act, sdirs, cconfs);
374 : }
375 : else
376 : {
377 6 : if(asfd->write(asfd, &sb->path))
378 : return -1;
379 : // If it is a link, send what
380 : // it points to.
381 6 : else if(sbuf_is_link(sb)
382 4 : && asfd->write(asfd, &sb->link)) return -1;
383 6 : cntr_add(get_cntr(cconfs), sb->path.cmd, 0);
384 : }
385 6 : return 0;
386 : }
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