Line data Source code
1 : #include "../../../burp.h"
2 : #include "../../../alloc.h"
3 : #include "../../../asfd.h"
4 : #include "../../../async.h"
5 : #include "../../../cmd.h"
6 : #include "../../../conf.h"
7 : #include "../../../conffile.h"
8 : #include "../../../fsops.h"
9 : #include "../../../handy.h"
10 : #include "../../../iobuf.h"
11 : #include "../../../lock.h"
12 : #include "../../../log.h"
13 : #include "../../../protocol2/blist.h"
14 : #include "../../../protocol2/blk.h"
15 : #include "../../sdirs.h"
16 : #include "candidate.h"
17 : #include "champ_chooser.h"
18 : #include "champ_server.h"
19 : #include "dindex.h"
20 : #include "incoming.h"
21 : #include "scores.h"
22 :
23 : #include <sys/un.h>
24 :
25 0 : static int champ_chooser_new_client(struct async *as, struct conf **confs)
26 : {
27 0 : int fd=-1;
28 : socklen_t t;
29 0 : struct asfd *newfd=NULL;
30 : struct sockaddr_un remote;
31 0 : struct blist *blist=NULL;
32 :
33 0 : t=sizeof(remote);
34 0 : if((fd=accept(as->asfd->fd, (struct sockaddr *)&remote, &t))<0)
35 : {
36 0 : logp("accept error in %s: %s\n", __func__, strerror(errno));
37 0 : goto error;
38 : }
39 :
40 0 : if(!(blist=blist_alloc())
41 0 : || !(newfd=setup_asfd(as, "(unknown)", &fd)))
42 : goto error;
43 0 : newfd->blist=blist;
44 0 : newfd->set_timeout(newfd, get_int(confs[OPT_NETWORK_TIMEOUT]));
45 :
46 0 : logp("Connected to fd %d\n", newfd->fd);
47 :
48 0 : return 0;
49 : error:
50 0 : close_fd(&fd);
51 0 : blist_free(&blist);
52 0 : return -1;
53 : }
54 :
55 0 : static int results_to_fd(struct asfd *asfd)
56 : {
57 : static struct iobuf wbuf;
58 : struct blk *b;
59 : struct blk *l;
60 :
61 0 : if(!asfd->blist->last_index) return 0;
62 :
63 : // Need to start writing the results down the fd.
64 0 : for(b=asfd->blist->head; b && b!=asfd->blist->blk_to_dedup; b=l)
65 : {
66 0 : if(b->got==BLK_GOT)
67 : {
68 : // Need to write to fd.
69 0 : blk_to_iobuf_index_and_savepath(b, &wbuf);
70 :
71 0 : switch(asfd->append_all_to_write_buffer(asfd, &wbuf))
72 : {
73 : case APPEND_OK: break;
74 : case APPEND_BLOCKED:
75 0 : asfd->blist->head=b;
76 0 : return 0; // Try again later.
77 : default: return -1;
78 : }
79 : }
80 : else
81 : {
82 : // If the last in the sequence is BLK_NOT_GOT,
83 : // Send a 'wrap_up' message.
84 0 : if(!b->next || b->next==asfd->blist->blk_to_dedup)
85 : {
86 0 : blk_to_iobuf_wrap_up(b, &wbuf);
87 0 : switch(asfd->append_all_to_write_buffer(asfd,
88 : &wbuf))
89 : {
90 : case APPEND_OK: break;
91 : case APPEND_BLOCKED:
92 0 : asfd->blist->head=b;
93 0 : return 0; // Try again later.
94 : default: return -1;
95 : }
96 : }
97 : }
98 0 : l=b->next;
99 0 : blk_free(&b);
100 : }
101 :
102 0 : asfd->blist->head=b;
103 0 : if(!b) asfd->blist->tail=NULL;
104 : return 0;
105 : }
106 :
107 4096 : static int deduplicate_maybe(struct asfd *asfd,
108 : struct blk *blk, const char *directory, struct scores *scores)
109 : {
110 4096 : if(!asfd->in && !(asfd->in=incoming_alloc())) return -1;
111 :
112 4096 : if(blk_fingerprint_is_hook(blk))
113 : {
114 4096 : if(incoming_grow_maybe(asfd->in)) return -1;
115 4096 : asfd->in->fingerprints[asfd->in->size-1]=blk->fingerprint;
116 : }
117 4096 : if(++(asfd->blkcnt)<MANIFEST_SIG_MAX) return 0;
118 1 : asfd->blkcnt=0;
119 :
120 1 : if(deduplicate(asfd, directory, scores)<0)
121 : return -1;
122 :
123 1 : return 0;
124 : }
125 :
126 : #ifndef UTEST
127 : static
128 : #endif
129 4097 : int champ_server_deal_with_rbuf_sig(struct asfd *asfd,
130 : const char *directory, struct scores *scores)
131 : {
132 : struct blk *blk;
133 4097 : if(!(blk=blk_alloc())) return -1;
134 :
135 4097 : blist_add_blk(asfd->blist, blk);
136 :
137 4097 : if(!asfd->blist->blk_to_dedup) asfd->blist->blk_to_dedup=blk;
138 :
139 4097 : if(blk_set_from_iobuf_sig(blk, asfd->rbuf)) return -1;
140 :
141 : //printf("Got weak/strong from %d: %lu - %s %s\n",
142 : // asfd->fd, blk->index, blk->weak, blk->strong);
143 :
144 4096 : return deduplicate_maybe(asfd, blk, directory, scores);
145 : }
146 :
147 0 : static int deal_with_client_rbuf(struct asfd *asfd, const char *directory,
148 : struct scores *scores)
149 : {
150 0 : if(asfd->rbuf->cmd==CMD_GEN)
151 : {
152 0 : if(!strncmp_w(asfd->rbuf->buf, "cname:"))
153 : {
154 : struct iobuf wbuf;
155 0 : free_w(&asfd->desc);
156 0 : if(!(asfd->desc=strdup_w(asfd->rbuf->buf
157 0 : +strlen("cname:"), __func__)))
158 : goto error;
159 0 : logp("%s: fd %d\n", asfd->desc, asfd->fd);
160 : iobuf_set(&wbuf, CMD_GEN,
161 0 : (char *)"cname ok", strlen("cname ok"));
162 :
163 0 : if(asfd->write(asfd, &wbuf))
164 : goto error;
165 : }
166 0 : else if(!strncmp_w(asfd->rbuf->buf, "sigs_end"))
167 : {
168 : //printf("Was told no more sigs\n");
169 0 : if(deduplicate(asfd, directory, scores)<0)
170 : goto error;
171 : }
172 : else
173 : {
174 0 : iobuf_log_unexpected(asfd->rbuf, __func__);
175 0 : goto error;
176 : }
177 : }
178 0 : else if(asfd->rbuf->cmd==CMD_SIG)
179 : {
180 0 : if(champ_server_deal_with_rbuf_sig(asfd, directory, scores))
181 : goto error;
182 : }
183 0 : else if(asfd->rbuf->cmd==CMD_MANIFEST)
184 : {
185 : // Client has completed a manifest file. Want to start using
186 : // it as a dedup candidate now.
187 0 : if(candidate_add_fresh(asfd->rbuf->buf, directory, scores))
188 : goto error;
189 : }
190 : else
191 : {
192 0 : iobuf_log_unexpected(asfd->rbuf, __func__);
193 0 : goto error;
194 : }
195 0 : iobuf_free_content(asfd->rbuf);
196 0 : return 0;
197 : error:
198 0 : iobuf_free_content(asfd->rbuf);
199 0 : return -1;
200 : }
201 :
202 0 : int champ_chooser_server(struct sdirs *sdirs, struct conf **confs,
203 : int resume)
204 : {
205 : int s;
206 0 : int ret=-1;
207 : int len;
208 0 : struct asfd *asfd=NULL;
209 : struct sockaddr_un local;
210 0 : struct lock *lock=NULL;
211 0 : struct async *as=NULL;
212 0 : int started=0;
213 0 : struct scores *scores=NULL;
214 0 : const char *directory=get_string(confs[OPT_DIRECTORY]);
215 :
216 0 : if(!(lock=lock_alloc_and_init(sdirs->champlock))
217 0 : || build_path_w(sdirs->champlock))
218 : goto end;
219 0 : lock_get(lock);
220 0 : switch(lock->status)
221 : {
222 : case GET_LOCK_GOT:
223 0 : log_fzp_set(sdirs->champlog, confs);
224 : logp("Got champ lock for dedup_group: %s\n",
225 0 : get_string(confs[OPT_DEDUP_GROUP]));
226 : break;
227 : case GET_LOCK_NOT_GOT:
228 : case GET_LOCK_ERROR:
229 : default:
230 : //logp("Did not get champ lock\n");
231 : goto end;
232 : }
233 :
234 0 : if((s=socket(AF_UNIX, SOCK_STREAM, 0))<0)
235 : {
236 0 : logp("socket error in %s: %s\n", __func__, strerror(errno));
237 0 : goto end;
238 : }
239 :
240 : memset(&local, 0, sizeof(struct sockaddr_un));
241 0 : local.sun_family=AF_UNIX;
242 : snprintf(local.sun_path, sizeof(local.sun_path),
243 0 : "%s", sdirs->champsock);
244 0 : len=strlen(local.sun_path)+sizeof(local.sun_family)+1;
245 0 : unlink(sdirs->champsock);
246 0 : if(bind(s, (struct sockaddr *)&local, len)<0)
247 : {
248 0 : logp("bind error in %s: %s\n", __func__, strerror(errno));
249 0 : goto end;
250 : }
251 :
252 0 : if(listen(s, 5)<0)
253 : {
254 0 : logp("listen error in %s: %s\n", __func__, strerror(errno));
255 0 : goto end;
256 : }
257 :
258 0 : if(!(as=async_alloc())
259 0 : || as->init(as, 0)
260 0 : || !(asfd=setup_asfd(as, "champ chooser main socket", &s)))
261 : goto end;
262 0 : asfd->fdtype=ASFD_FD_SERVER_LISTEN_MAIN;
263 0 : asfd->set_timeout(asfd, get_int(confs[OPT_NETWORK_TIMEOUT]));
264 :
265 : // I think that this is probably the best point at which to run a
266 : // cleanup job to delete unused data files, because no other process
267 : // can fiddle with the dedup_group at this point.
268 : // Cannot do it on a resume, or it will delete files that are
269 : // referenced in the backup we are resuming.
270 0 : if(delete_unused_data_files(sdirs, resume))
271 : goto end;
272 :
273 : // Load the sparse indexes for this dedup group.
274 0 : if(!(scores=champ_chooser_init(sdirs->data)))
275 : goto end;
276 :
277 : while(1)
278 : {
279 0 : for(asfd=as->asfd->next; asfd; asfd=asfd->next)
280 : {
281 0 : if(!asfd->blist->head
282 0 : || asfd->blist->head->got==BLK_INCOMING) continue;
283 0 : if(results_to_fd(asfd)) goto end;
284 : }
285 :
286 0 : switch(as->read_write(as))
287 : {
288 : case 0:
289 : // Check the main socket last, as it might add
290 : // a new client to the list.
291 0 : for(asfd=as->asfd->next; asfd; asfd=asfd->next)
292 : {
293 0 : while(asfd->rbuf->buf)
294 : {
295 0 : if(deal_with_client_rbuf(asfd,
296 0 : directory, scores))
297 : goto end;
298 : // Get as much out of the
299 : // readbuf as possible.
300 0 : if(asfd->parse_readbuf(asfd))
301 : goto end;
302 : }
303 : }
304 0 : if(as->asfd->new_client)
305 : {
306 : // Incoming client.
307 0 : as->asfd->new_client=0;
308 0 : if(champ_chooser_new_client(as, confs))
309 : goto end;
310 : started=1;
311 : }
312 : break;
313 : default:
314 0 : int removed=0;
315 : // Maybe one of the fds had a problem.
316 : // Find and remove it and carry on if possible.
317 0 : for(asfd=as->asfd->next; asfd; )
318 : {
319 : struct asfd *a;
320 0 : if(!asfd->want_to_remove)
321 : {
322 0 : asfd=asfd->next;
323 0 : continue;
324 : }
325 0 : as->asfd_remove(as, asfd);
326 : logp("%s: disconnected fd %d\n",
327 0 : asfd->desc, asfd->fd);
328 0 : a=asfd->next;
329 0 : asfd_free(&asfd);
330 0 : asfd=a;
331 0 : removed++;
332 : }
333 0 : if(removed) break;
334 : // If we got here, there was no fd to remove.
335 : // It is a fatal error.
336 : goto end;
337 : }
338 :
339 0 : if(started && !as->asfd->next)
340 : {
341 0 : logp("All clients disconnected.\n");
342 0 : ret=0;
343 0 : break;
344 : }
345 : }
346 :
347 : end:
348 0 : logp("champ chooser exiting: %d\n", ret);
349 0 : champ_chooser_free(&scores);
350 0 : log_fzp_set(NULL, confs);
351 0 : async_free(&as);
352 0 : asfd_free(&asfd); // This closes s for us.
353 0 : close_fd(&s);
354 0 : unlink(sdirs->champsock);
355 : // FIX THIS: free asfds.
356 0 : lock_release(lock);
357 0 : lock_free(&lock);
358 0 : return ret;
359 : }
360 :
361 : // The return code of this is the return code of the standalone process.
362 0 : int champ_chooser_server_standalone(struct conf **globalcs)
363 : {
364 0 : int ret=1;
365 0 : struct sdirs *sdirs=NULL;
366 0 : struct conf **cconfs=NULL;
367 0 : const char *orig_client=get_string(globalcs[OPT_ORIG_CLIENT]);
368 :
369 0 : if(!(cconfs=confs_alloc()))
370 : goto end;
371 0 : confs_init(cconfs);
372 : // We need to be given a client name and load the relevant server side
373 : // clientconfdir file, because various settings may be overridden
374 : // there.
375 0 : if(set_string(cconfs[OPT_CNAME], orig_client)
376 0 : || conf_load_clientconfdir(globalcs, cconfs)
377 0 : || !(sdirs=sdirs_alloc())
378 0 : || sdirs_init_from_confs(sdirs, cconfs)
379 0 : || champ_chooser_server(sdirs, cconfs, 0 /* resume */))
380 : goto end;
381 0 : ret=0;
382 : end:
383 0 : confs_free(&cconfs);
384 0 : sdirs_free(&sdirs);
385 0 : return ret;
386 : }
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