Line data Source code
1 : #include "../burp.h"
2 : #include "../action.h"
3 : #include "../alloc.h"
4 : #include "../asfd.h"
5 : #include "../async.h"
6 : #include "../conf.h"
7 : #include "../cmd.h"
8 : #include "../cntr.h"
9 : #include "../fsops.h"
10 : #include "../handy.h"
11 : #include "../iobuf.h"
12 : #include "../log.h"
13 : #include "../run_script.h"
14 : #include "auth.h"
15 : #include "backup_phase1.h"
16 : #include "backup_phase3.h"
17 : #include "compress.h"
18 : #include "delete.h"
19 : #include "sdirs.h"
20 : #include "protocol1/backup_phase2.h"
21 : #include "protocol1/backup_phase4.h"
22 : #include "protocol2/backup_phase2.h"
23 : #include "protocol2/backup_phase4.h"
24 : #include "backup.h"
25 :
26 1 : static int open_log(struct asfd *asfd,
27 : struct sdirs *sdirs, struct conf **cconfs)
28 : {
29 1 : int ret=-1;
30 1 : char *logpath=NULL;
31 1 : const char *peer_version=get_string(cconfs[OPT_PEER_VERSION]);
32 :
33 1 : if(!(logpath=prepend_s(sdirs->rworking, "log"))) goto end;
34 1 : if(log_fzp_set(logpath, cconfs))
35 : {
36 0 : logp("could not open log file: %s\n", logpath);
37 : goto end;
38 : }
39 :
40 1 : logp("Client version: %s\n", peer_version?:"");
41 1 : logp("Protocol: %d\n", (int)get_protocol(cconfs));
42 1 : if(get_int(cconfs[OPT_CLIENT_IS_WINDOWS]))
43 0 : logp("Client is Windows\n");
44 :
45 : // Make sure a warning appears in the backup log.
46 : // The client will already have been sent a message with logw.
47 : // This time, prevent it sending a logw to the client by specifying
48 : // NULL for cntr.
49 1 : if(get_int(cconfs[OPT_VERSION_WARN])) version_warn(asfd, NULL, cconfs);
50 :
51 : ret=0;
52 : end:
53 1 : free_w(&logpath);
54 1 : return ret;
55 : }
56 :
57 1 : static int write_incexc(const char *realworking, const char *incexc)
58 : {
59 1 : int ret=-1;
60 1 : char *tmp=NULL;
61 1 : char *path=NULL;
62 1 : struct fzp *fzp=NULL;
63 :
64 1 : if(!incexc || !*incexc) return 0;
65 :
66 0 : if(!(path=prepend_s(realworking, "incexc"))
67 0 : || !(tmp=prepend(path, ".tmp"))
68 0 : || !(fzp=fzp_open(tmp, "wb")))
69 : goto end;
70 :
71 0 : fzp_printf(fzp, "%s", incexc);
72 0 : if(fzp_close(&fzp))
73 : {
74 0 : logp("error writing to %s in %s\n", tmp, __func__);
75 0 : goto end;
76 : }
77 0 : if(do_rename(tmp, path))
78 : goto end;
79 0 : ret=0;
80 : end:
81 0 : free_w(&path);
82 0 : free_w(&tmp);
83 0 : return ret;
84 : }
85 :
86 1 : static int backup_phase1_server(struct async *as,
87 : struct sdirs *sdirs, struct conf **cconfs)
88 : {
89 1 : int breaking=get_int(cconfs[OPT_BREAKPOINT]);
90 1 : if(breaking==1)
91 0 : return breakpoint(breaking, __func__);
92 1 : return backup_phase1_server_all(as, sdirs, cconfs);
93 : }
94 :
95 0 : static int backup_phase2_server(struct async *as, struct sdirs *sdirs,
96 : const char *incexc, int resume, struct conf **cconfs)
97 : {
98 0 : int breaking=get_int(cconfs[OPT_BREAKPOINT]);
99 0 : if(breaking==2)
100 0 : return breakpoint(breaking, __func__);
101 :
102 0 : switch(get_protocol(cconfs))
103 : {
104 : case PROTO_1:
105 0 : return backup_phase2_server_protocol1(as, sdirs,
106 : incexc, resume, cconfs);
107 : default:
108 0 : return backup_phase2_server_protocol2(as, sdirs,
109 : resume, cconfs);
110 : }
111 : }
112 :
113 0 : static int backup_phase3_server(struct sdirs *sdirs, struct conf **cconfs)
114 : {
115 0 : int breaking=get_int(cconfs[OPT_BREAKPOINT]);
116 0 : if(breaking==3)
117 0 : return breakpoint(breaking, __func__);
118 :
119 0 : return backup_phase3_server_all(sdirs, cconfs);
120 : }
121 :
122 0 : static int backup_phase4_server(struct sdirs *sdirs, struct conf **cconfs)
123 : {
124 0 : int breaking=get_int(cconfs[OPT_BREAKPOINT]);
125 0 : if(breaking==4)
126 0 : return breakpoint(breaking, __func__);
127 :
128 0 : log_fzp_set(NULL, cconfs);
129 : // Phase4 will open logfp again (in case it is resuming).
130 0 : switch(get_protocol(cconfs))
131 : {
132 : case PROTO_1:
133 0 : return backup_phase4_server_protocol1(sdirs, cconfs);
134 : default:
135 0 : return backup_phase4_server_protocol2(sdirs, cconfs);
136 : }
137 : }
138 :
139 1 : static void log_rshash(struct conf **confs)
140 : {
141 2 : if(get_protocol(confs)!=PROTO_1) return;
142 0 : logp("Using librsync hash %s\n",
143 : rshash_to_str(get_e_rshash(confs[OPT_RSHASH])));
144 : }
145 :
146 1 : static int do_backup_server(struct async *as, struct sdirs *sdirs,
147 : struct conf **cconfs, const char *incexc, int resume)
148 : {
149 1 : int ret=0;
150 1 : int do_phase2=1;
151 1 : struct asfd *asfd=as->asfd;
152 1 : enum protocol protocol=get_protocol(cconfs);
153 1 : struct cntr *cntr=get_cntr(cconfs);
154 :
155 1 : logp("in do_backup_server\n");
156 :
157 1 : log_rshash(cconfs);
158 :
159 1 : if(resume)
160 : {
161 0 : if(sdirs_get_real_working_from_symlink(sdirs)
162 0 : || sdirs_get_real_manifest(sdirs, protocol)
163 0 : || open_log(asfd, sdirs, cconfs))
164 : goto error;
165 : }
166 : else
167 : {
168 : // Not resuming - need to set everything up fresh.
169 1 : if(sdirs_create_real_working(sdirs,
170 1 : get_string(cconfs[OPT_TIMESTAMP_FORMAT]))
171 1 : || sdirs_get_real_manifest(sdirs, protocol)
172 1 : || open_log(asfd, sdirs, cconfs))
173 : goto error;
174 :
175 1 : if(write_incexc(sdirs->rworking, incexc))
176 : {
177 0 : logp("unable to write incexc\n");
178 0 : goto error;
179 : }
180 :
181 1 : if(backup_phase1_server(as, sdirs, cconfs))
182 : {
183 1 : logp("error in phase 1\n");
184 1 : goto error;
185 : }
186 : }
187 :
188 0 : if(resume)
189 : {
190 : struct stat statp;
191 0 : if(lstat(sdirs->phase1data, &statp)
192 0 : && !lstat(sdirs->changed, &statp)
193 0 : && !lstat(sdirs->unchanged, &statp))
194 : {
195 : // In this condition, it looks like there was an
196 : // interruption during phase3. Skip phase2.
197 0 : do_phase2=0;
198 : }
199 : }
200 :
201 0 : if(do_phase2)
202 : {
203 0 : if(backup_phase2_server(as, sdirs, incexc, resume, cconfs))
204 : {
205 0 : logp("error in backup phase 2\n");
206 0 : goto error;
207 : }
208 :
209 0 : asfd->write_str(asfd, CMD_GEN, "okbackupend");
210 : }
211 :
212 : // Close the connection with the client, the rest of the job we can do
213 : // by ourselves.
214 0 : logp("Backup ending - disconnect from client.\n");
215 0 : if(asfd_flush_asio(asfd)) goto end;
216 0 : as->asfd_remove(as, asfd);
217 0 : asfd_close(asfd);
218 :
219 0 : if(backup_phase3_server(sdirs, cconfs))
220 : {
221 0 : logp("error in backup phase 3\n");
222 0 : goto error;
223 : }
224 :
225 0 : if(do_rename(sdirs->working, sdirs->finishing))
226 : goto error;
227 :
228 0 : if(backup_phase4_server(sdirs, cconfs))
229 : {
230 0 : logp("error in backup phase 4\n");
231 0 : goto error;
232 : }
233 :
234 0 : cntr_print(cntr, ACTION_BACKUP, asfd);
235 0 : cntr_stats_to_file(cntr, sdirs->rworking, ACTION_BACKUP);
236 :
237 0 : if(protocol==PROTO_2)
238 : {
239 : // Regenerate dindex before the symlink is renamed, so that the
240 : // champ chooser cleanup does not try to remove data files
241 : // whilst the dindex regeneration is happening.
242 0 : if(regenerate_client_dindex(sdirs))
243 : goto error;
244 : }
245 :
246 : // Move the symlink to indicate that we are now in the end phase. The
247 : // rename() race condition is automatically recoverable here.
248 0 : if(do_rename(sdirs->finishing, sdirs->current))
249 : goto error;
250 :
251 0 : logp("Backup completed.\n");
252 0 : log_fzp_set(NULL, cconfs);
253 0 : compress_filename(sdirs->rworking,
254 : "log", "log.gz", get_int(cconfs[OPT_COMPRESSION]));
255 :
256 0 : goto end;
257 : error:
258 : ret=-1;
259 : end:
260 :
261 1 : log_fzp_set(NULL, cconfs);
262 1 : return ret;
263 : }
264 :
265 1 : int run_backup(struct async *as, struct sdirs *sdirs, struct conf **cconfs,
266 : const char *incexc, int *timer_ret, int resume)
267 : {
268 : int ret;
269 1 : char okstr[32]="";
270 1 : struct asfd *asfd=as->asfd;
271 1 : struct iobuf *rbuf=asfd->rbuf;
272 1 : const char *cname=get_string(cconfs[OPT_CNAME]);
273 :
274 1 : if(get_string(cconfs[OPT_RESTORE_CLIENT]))
275 : {
276 : // This client is not the original client, so a backup might
277 : // cause all sorts of trouble.
278 0 : logp("Not allowing backup of %s\n", cname);
279 0 : return asfd->write_str(asfd, CMD_GEN, "Backup is not allowed");
280 : }
281 :
282 : // Set quality of service bits on backups.
283 1 : asfd->set_bulk_packets(asfd);
284 :
285 1 : if(!strncmp_w(rbuf->buf, "backupphase1timed"))
286 : {
287 0 : int a=0;
288 : const char *args[12];
289 0 : int checkonly=!strncmp_w(rbuf->buf, "backupphase1timedcheck");
290 0 : if(checkonly) logp("Client asked for a timer check only.\n");
291 :
292 0 : args[a++]=get_string(cconfs[OPT_TIMER_SCRIPT]);
293 0 : args[a++]=cname;
294 0 : args[a++]=sdirs->current;
295 0 : args[a++]=sdirs->clients;
296 0 : args[a++]="reserved1";
297 0 : args[a++]="reserved2";
298 0 : args[a++]=NULL;
299 0 : if((*timer_ret=run_script(asfd, args,
300 : get_strlist(cconfs[OPT_TIMER_ARG]),
301 : cconfs,
302 : 1 /* wait */,
303 : 1 /* use logp */,
304 : 0 /* no log_remote */
305 : ))<0)
306 : {
307 0 : logp("Error running timer script for %s\n",
308 : cname);
309 0 : return *timer_ret;
310 : }
311 0 : if(*timer_ret)
312 : {
313 0 : if(!checkonly)
314 0 : logp("Not running backup of %s\n",
315 : cname);
316 0 : return asfd->write_str(asfd,
317 : CMD_GEN, "timer conditions not met");
318 : }
319 0 : if(checkonly)
320 : {
321 0 : logp("Client asked for a timer check only,\n");
322 0 : logp("so a backup is not happening right now.\n");
323 0 : return asfd->write_str(asfd,
324 : CMD_GEN, "timer conditions met");
325 : }
326 0 : logp("Running backup of %s\n", cname);
327 : }
328 1 : else if(!get_int(cconfs[OPT_CLIENT_CAN_FORCE_BACKUP]))
329 : {
330 0 : logp("Not allowing forced backup of %s\n", cname);
331 0 : return asfd->write_str(asfd,
332 : CMD_GEN, "Forced backup is not allowed");
333 : }
334 :
335 1 : snprintf(okstr, sizeof(okstr), "%s:%d",
336 : resume?"resume":"ok", get_int(cconfs[OPT_COMPRESSION]));
337 1 : if(asfd->write_str(asfd, CMD_GEN, okstr)) return -1;
338 :
339 1 : if((ret=do_backup_server(as, sdirs, cconfs, incexc, resume)))
340 : goto end;
341 :
342 0 : if((ret=delete_backups(sdirs, cname,
343 : get_strlist(cconfs[OPT_KEEP]),
344 0 : get_string(cconfs[OPT_MANUAL_DELETE]))))
345 : goto end;
346 : end:
347 1 : return ret;
348 : }
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