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 : // FIX THIS: test error conditions.
26 0 : static int champ_chooser_new_client(struct async *as, struct conf **confs)
27 : {
28 : socklen_t t;
29 0 : int fd=-1;
30 0 : struct asfd *newfd=NULL;
31 : struct sockaddr_un remote;
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 0 : set_non_blocking(fd);
40 :
41 0 : if(!(newfd=asfd_alloc())
42 0 : || newfd->init(newfd, "(unknown)", as, fd, NULL,
43 0 : ASFD_STREAM_STANDARD, confs)
44 0 : || !(newfd->blist=blist_alloc()))
45 : goto error;
46 0 : as->asfd_add(as, newfd);
47 :
48 0 : logp("Connected to fd %d\n", newfd->fd);
49 :
50 0 : return 0;
51 : error:
52 0 : asfd_free(&newfd);
53 0 : return -1;
54 : }
55 :
56 0 : static int results_to_fd(struct asfd *asfd)
57 : {
58 : static struct iobuf wbuf;
59 : struct blk *b;
60 : struct blk *l;
61 :
62 0 : if(!asfd->blist->last_index) return 0;
63 :
64 : // Need to start writing the results down the fd.
65 0 : for(b=asfd->blist->head; b && b!=asfd->blist->blk_to_dedup; b=l)
66 : {
67 0 : if(b->got==BLK_GOT)
68 : {
69 : // Need to write to fd.
70 0 : blk_to_iobuf_index_and_savepath(b, &wbuf);
71 :
72 0 : switch(asfd->append_all_to_write_buffer(asfd, &wbuf))
73 : {
74 : case APPEND_OK: break;
75 : case APPEND_BLOCKED:
76 0 : asfd->blist->head=b;
77 0 : return 0; // Try again later.
78 : default: return -1;
79 : }
80 : }
81 : else
82 : {
83 : // If the last in the sequence is BLK_NOT_GOT,
84 : // Send a 'wrap_up' message.
85 0 : if(!b->next || b->next==asfd->blist->blk_to_dedup)
86 : {
87 0 : blk_to_iobuf_wrap_up(b, &wbuf);
88 0 : switch(asfd->append_all_to_write_buffer(asfd,
89 : &wbuf))
90 : {
91 : case APPEND_OK: break;
92 : case APPEND_BLOCKED:
93 0 : asfd->blist->head=b;
94 0 : return 0; // Try again later.
95 : default: return -1;
96 : }
97 : }
98 : }
99 0 : l=b->next;
100 0 : blk_free(&b);
101 : }
102 :
103 0 : asfd->blist->head=b;
104 0 : if(!b) asfd->blist->tail=NULL;
105 : return 0;
106 : }
107 :
108 4096 : static int deduplicate_maybe(struct asfd *asfd,
109 : struct blk *blk, const char *directory, struct scores *scores)
110 : {
111 4096 : if(!asfd->in && !(asfd->in=incoming_alloc())) return -1;
112 :
113 4096 : if(blk_fingerprint_is_hook(blk))
114 : {
115 4096 : if(incoming_grow_maybe(asfd->in)) return -1;
116 4096 : asfd->in->fingerprints[asfd->in->size-1]=blk->fingerprint;
117 : }
118 4096 : if(++(asfd->blkcnt)<MANIFEST_SIG_MAX) return 0;
119 1 : asfd->blkcnt=0;
120 :
121 1 : if(deduplicate(asfd, directory, scores)<0)
122 : return -1;
123 :
124 1 : return 0;
125 : }
126 :
127 : #ifndef UTEST
128 : static
129 : #endif
130 4097 : int champ_server_deal_with_rbuf_sig(struct asfd *asfd,
131 : const char *directory, struct scores *scores)
132 : {
133 : struct blk *blk;
134 4097 : if(!(blk=blk_alloc())) return -1;
135 :
136 4097 : blist_add_blk(asfd->blist, blk);
137 :
138 4097 : if(!asfd->blist->blk_to_dedup) asfd->blist->blk_to_dedup=blk;
139 :
140 4097 : if(blk_set_from_iobuf_sig(blk, asfd->rbuf)) return -1;
141 :
142 : //printf("Got weak/strong from %d: %lu - %s %s\n",
143 : // asfd->fd, blk->index, blk->weak, blk->strong);
144 :
145 4096 : return deduplicate_maybe(asfd, blk, directory, scores);
146 : }
147 :
148 0 : static int deal_with_client_rbuf(struct asfd *asfd, const char *directory,
149 : struct scores *scores)
150 : {
151 0 : if(asfd->rbuf->cmd==CMD_GEN)
152 : {
153 0 : if(!strncmp_w(asfd->rbuf->buf, "cname:"))
154 : {
155 : struct iobuf wbuf;
156 0 : free_w(&asfd->desc);
157 0 : if(!(asfd->desc=strdup_w(asfd->rbuf->buf
158 0 : +strlen("cname:"), __func__)))
159 : goto error;
160 0 : logp("%s: fd %d\n", asfd->desc, asfd->fd);
161 : iobuf_set(&wbuf, CMD_GEN,
162 0 : (char *)"cname ok", strlen("cname ok"));
163 :
164 0 : if(asfd->write(asfd, &wbuf))
165 : goto error;
166 : }
167 0 : else if(!strncmp_w(asfd->rbuf->buf, "sigs_end"))
168 : {
169 : //printf("Was told no more sigs\n");
170 0 : if(deduplicate(asfd, directory, scores)<0)
171 : goto error;
172 : }
173 : else
174 : {
175 0 : iobuf_log_unexpected(asfd->rbuf, __func__);
176 0 : goto error;
177 : }
178 : }
179 0 : else if(asfd->rbuf->cmd==CMD_SIG)
180 : {
181 0 : if(champ_server_deal_with_rbuf_sig(asfd, directory, scores))
182 : goto error;
183 : }
184 0 : else if(asfd->rbuf->cmd==CMD_MANIFEST)
185 : {
186 : // Client has completed a manifest file. Want to start using
187 : // it as a dedup candidate now.
188 0 : if(candidate_add_fresh(asfd->rbuf->buf, directory, scores))
189 : goto error;
190 : }
191 : else
192 : {
193 0 : iobuf_log_unexpected(asfd->rbuf, __func__);
194 0 : goto error;
195 : }
196 0 : iobuf_free_content(asfd->rbuf);
197 0 : return 0;
198 : error:
199 0 : iobuf_free_content(asfd->rbuf);
200 0 : return -1;
201 : }
202 :
203 0 : int champ_chooser_server(struct sdirs *sdirs, struct conf **confs,
204 : int resume)
205 : {
206 : int s;
207 0 : int ret=-1;
208 : int len;
209 0 : struct asfd *asfd=NULL;
210 : struct sockaddr_un local;
211 0 : struct lock *lock=NULL;
212 0 : struct async *as=NULL;
213 0 : int started=0;
214 0 : struct scores *scores=NULL;
215 0 : const char *directory=get_string(confs[OPT_DIRECTORY]);
216 :
217 0 : if(!(lock=lock_alloc_and_init(sdirs->champlock))
218 0 : || build_path_w(sdirs->champlock))
219 : goto end;
220 0 : lock_get(lock);
221 0 : switch(lock->status)
222 : {
223 : case GET_LOCK_GOT:
224 0 : log_fzp_set(sdirs->champlog, confs);
225 : logp("Got champ lock for dedup_group: %s\n",
226 0 : get_string(confs[OPT_DEDUP_GROUP]));
227 : break;
228 : case GET_LOCK_NOT_GOT:
229 : case GET_LOCK_ERROR:
230 : default:
231 : //logp("Did not get champ lock\n");
232 : goto end;
233 : }
234 :
235 0 : if((s=socket(AF_UNIX, SOCK_STREAM, 0))<0)
236 : {
237 0 : logp("socket error in %s: %s\n", __func__, strerror(errno));
238 0 : goto end;
239 : }
240 :
241 : memset(&local, 0, sizeof(struct sockaddr_un));
242 0 : local.sun_family=AF_UNIX;
243 : snprintf(local.sun_path, sizeof(local.sun_path),
244 0 : "%s", sdirs->champsock);
245 0 : len=strlen(local.sun_path)+sizeof(local.sun_family)+1;
246 0 : unlink(sdirs->champsock);
247 0 : if(bind(s, (struct sockaddr *)&local, len)<0)
248 : {
249 0 : logp("bind error in %s: %s\n", __func__, strerror(errno));
250 0 : goto end;
251 : }
252 :
253 0 : if(listen(s, 5)<0)
254 : {
255 0 : logp("listen error in %s: %s\n", __func__, strerror(errno));
256 0 : goto end;
257 : }
258 0 : set_non_blocking(s);
259 :
260 0 : if(!(as=async_alloc())
261 0 : || !(asfd=asfd_alloc())
262 0 : || as->init(as, 0)
263 0 : || asfd->init(asfd, "champ chooser main socket", as, s, NULL,
264 0 : ASFD_STREAM_STANDARD, confs))
265 : goto end;
266 0 : as->asfd_add(as, asfd);
267 0 : asfd->fdtype=ASFD_FD_SERVER_LISTEN_MAIN;
268 :
269 : // I think that this is probably the best point at which to run a
270 : // cleanup job to delete unused data files, because no other process
271 : // can fiddle with the dedup_group at this point.
272 : // Cannot do it on a resume, or it will delete files that are
273 : // referenced in the backup we are resuming.
274 0 : if(delete_unused_data_files(sdirs, resume))
275 : goto end;
276 :
277 : // Load the sparse indexes for this dedup group.
278 0 : if(!(scores=champ_chooser_init(sdirs->data)))
279 : goto end;
280 :
281 : while(1)
282 : {
283 0 : for(asfd=as->asfd->next; asfd; asfd=asfd->next)
284 : {
285 0 : if(!asfd->blist->head
286 0 : || asfd->blist->head->got==BLK_INCOMING) continue;
287 0 : if(results_to_fd(asfd)) goto end;
288 : }
289 :
290 0 : switch(as->read_write(as))
291 : {
292 : case 0:
293 : // Check the main socket last, as it might add
294 : // a new client to the list.
295 0 : for(asfd=as->asfd->next; asfd; asfd=asfd->next)
296 : {
297 0 : while(asfd->rbuf->buf)
298 : {
299 0 : if(deal_with_client_rbuf(asfd,
300 0 : directory, scores))
301 : goto end;
302 : // Get as much out of the
303 : // readbuf as possible.
304 0 : if(asfd->parse_readbuf(asfd))
305 : goto end;
306 : }
307 : }
308 0 : if(as->asfd->new_client)
309 : {
310 : // Incoming client.
311 0 : as->asfd->new_client=0;
312 0 : if(champ_chooser_new_client(as, confs))
313 : goto end;
314 : started=1;
315 : }
316 : break;
317 : default:
318 0 : int removed=0;
319 : // Maybe one of the fds had a problem.
320 : // Find and remove it and carry on if possible.
321 0 : for(asfd=as->asfd->next; asfd; )
322 : {
323 : struct asfd *a;
324 0 : if(!asfd->want_to_remove)
325 : {
326 0 : asfd=asfd->next;
327 0 : continue;
328 : }
329 0 : as->asfd_remove(as, asfd);
330 : logp("%s: disconnected fd %d\n",
331 0 : asfd->desc, asfd->fd);
332 0 : a=asfd->next;
333 0 : asfd_free(&asfd);
334 0 : asfd=a;
335 0 : removed++;
336 : }
337 0 : if(removed) break;
338 : // If we got here, there was no fd to remove.
339 : // It is a fatal error.
340 : goto end;
341 : }
342 :
343 0 : if(started && !as->asfd->next)
344 : {
345 0 : logp("All clients disconnected.\n");
346 0 : ret=0;
347 0 : break;
348 : }
349 : }
350 :
351 : end:
352 0 : logp("champ chooser exiting: %d\n", ret);
353 0 : champ_chooser_free(&scores);
354 0 : log_fzp_set(NULL, confs);
355 0 : async_free(&as);
356 0 : asfd_free(&asfd); // This closes s for us.
357 0 : close_fd(&s);
358 0 : unlink(sdirs->champsock);
359 : // FIX THIS: free asfds.
360 0 : lock_release(lock);
361 0 : lock_free(&lock);
362 0 : return ret;
363 : }
364 :
365 : // The return code of this is the return code of the standalone process.
366 0 : int champ_chooser_server_standalone(struct conf **globalcs)
367 : {
368 0 : int ret=1;
369 0 : struct sdirs *sdirs=NULL;
370 0 : struct conf **cconfs=NULL;
371 0 : const char *orig_client=get_string(globalcs[OPT_ORIG_CLIENT]);
372 :
373 0 : if(!(cconfs=confs_alloc()))
374 : goto end;
375 0 : confs_init(cconfs);
376 : // We need to be given a client name and load the relevant server side
377 : // clientconfdir file, because various settings may be overridden
378 : // there.
379 0 : if(set_string(cconfs[OPT_CNAME], orig_client)
380 0 : || conf_load_clientconfdir(globalcs, cconfs)
381 0 : || !(sdirs=sdirs_alloc())
382 0 : || sdirs_init_from_confs(sdirs, cconfs)
383 0 : || champ_chooser_server(sdirs, cconfs, 0 /* resume */))
384 : goto end;
385 0 : ret=0;
386 : end:
387 0 : confs_free(&cconfs);
388 0 : sdirs_free(&sdirs);
389 0 : return ret;
390 : }
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