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