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 : 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 :
45 0 : logp("Connected to fd %d\n", newfd->fd);
46 :
47 : return 0;
48 : error:
49 0 : close_fd(&fd);
50 0 : blist_free(&blist);
51 : return -1;
52 : }
53 :
54 0 : static int results_to_fd(struct asfd *asfd)
55 : {
56 : static struct iobuf wbuf;
57 : struct blk *b;
58 : struct blk *l;
59 :
60 0 : if(!asfd->blist->last_index) return 0;
61 :
62 : // Need to start writing the results down the fd.
63 0 : for(b=asfd->blist->head; b && b!=asfd->blist->blk_to_dedup; b=l)
64 : {
65 0 : if(b->got==BLK_GOT)
66 : {
67 : // Need to write to fd.
68 0 : blk_to_iobuf_index_and_savepath(b, &wbuf);
69 :
70 0 : switch(asfd->append_all_to_write_buffer(asfd, &wbuf))
71 : {
72 : case APPEND_OK: break;
73 : case APPEND_BLOCKED:
74 0 : asfd->blist->head=b;
75 0 : return 0; // Try again later.
76 : default: return -1;
77 : }
78 : }
79 : else
80 : {
81 : // If the last in the sequence is BLK_NOT_GOT,
82 : // Send a 'wrap_up' message.
83 0 : if(!b->next || b->next==asfd->blist->blk_to_dedup)
84 : {
85 0 : blk_to_iobuf_wrap_up(b, &wbuf);
86 0 : switch(asfd->append_all_to_write_buffer(asfd,
87 : &wbuf))
88 : {
89 : case APPEND_OK: break;
90 : case APPEND_BLOCKED:
91 0 : asfd->blist->head=b;
92 0 : return 0; // Try again later.
93 : default: return -1;
94 : }
95 : }
96 : }
97 0 : l=b->next;
98 0 : blk_free(&b);
99 : }
100 :
101 0 : asfd->blist->head=b;
102 0 : if(!b) asfd->blist->tail=NULL;
103 : return 0;
104 : }
105 :
106 4096 : static int deduplicate_maybe(struct asfd *asfd,
107 : struct blk *blk, const char *directory, struct scores *scores)
108 : {
109 4096 : if(!asfd->in && !(asfd->in=incoming_alloc()))
110 : return -1;
111 :
112 4096 : if(blk_fingerprint_is_hook(blk))
113 : {
114 4096 : if(incoming_grow_maybe(asfd->in))
115 : return -1;
116 4096 : asfd->in->fingerprints[asfd->in->size-1]=blk->fingerprint;
117 : }
118 4096 : if(++(asfd->blkcnt)<MANIFEST_SIG_MAX)
119 : return 0;
120 1 : asfd->blkcnt=0;
121 :
122 1 : if(deduplicate(asfd, directory, scores)<0)
123 : return -1;
124 :
125 1 : return 0;
126 : }
127 :
128 : #ifndef UTEST
129 : static
130 : #endif
131 4097 : int champ_server_deal_with_rbuf_sig(struct asfd *asfd,
132 : const char *directory, struct scores *scores)
133 : {
134 : struct blk *blk;
135 4097 : if(!(blk=blk_alloc())) return -1;
136 :
137 4097 : blist_add_blk(asfd->blist, blk);
138 :
139 4097 : if(!asfd->blist->blk_to_dedup)
140 0 : asfd->blist->blk_to_dedup=blk;
141 :
142 4097 : if(blk_set_from_iobuf_sig(blk, asfd->rbuf))
143 : return -1;
144 :
145 : //logp("Got fingerprint from %d: %lu - %lu\n",
146 : // asfd->fd, blk->index, blk->fingerprint);
147 :
148 4096 : return deduplicate_maybe(asfd, blk, directory, scores);
149 : }
150 :
151 0 : static int deal_with_client_rbuf(struct asfd *asfd, const char *directory,
152 : struct scores *scores)
153 : {
154 0 : if(asfd->rbuf->cmd==CMD_GEN)
155 : {
156 0 : if(!strncmp_w(asfd->rbuf->buf, "cname:"))
157 : {
158 : struct iobuf wbuf;
159 0 : free_w(&asfd->desc);
160 0 : if(!(asfd->desc=strdup_w(asfd->rbuf->buf
161 0 : +strlen("cname:"), __func__)))
162 : goto error;
163 0 : logp("%s: fd %d\n", asfd->desc, asfd->fd);
164 : iobuf_set(&wbuf, CMD_GEN,
165 0 : (char *)"cname ok", strlen("cname ok"));
166 :
167 0 : if(asfd->write(asfd, &wbuf))
168 : goto error;
169 : }
170 0 : else if(!strncmp_w(asfd->rbuf->buf, "sigs_end"))
171 : {
172 : //printf("Was told no more sigs\n");
173 0 : if(deduplicate(asfd, directory, scores)<0)
174 : goto error;
175 : }
176 : else
177 : {
178 0 : iobuf_log_unexpected(asfd->rbuf, __func__);
179 0 : goto error;
180 : }
181 : }
182 0 : else if(asfd->rbuf->cmd==CMD_SIG)
183 : {
184 0 : if(champ_server_deal_with_rbuf_sig(asfd, directory, scores))
185 : goto error;
186 : }
187 0 : else if(asfd->rbuf->cmd==CMD_MANIFEST)
188 : {
189 : // Client has completed a manifest file. Want to start using
190 : // it as a dedup candidate now.
191 0 : if(candidate_add_fresh(asfd->rbuf->buf, directory, scores))
192 : goto error;
193 : }
194 : else
195 : {
196 0 : iobuf_log_unexpected(asfd->rbuf, __func__);
197 0 : goto error;
198 : }
199 0 : iobuf_free_content(asfd->rbuf);
200 0 : return 0;
201 : error:
202 0 : iobuf_free_content(asfd->rbuf);
203 0 : return -1;
204 : }
205 :
206 0 : int champ_chooser_server(struct sdirs *sdirs, struct conf **confs,
207 : int resume)
208 : {
209 : int s;
210 0 : int ret=-1;
211 : int len;
212 0 : struct asfd *asfd=NULL;
213 : struct sockaddr_un local;
214 0 : struct lock *lock=NULL;
215 0 : struct async *as=NULL;
216 0 : int started=0;
217 0 : struct scores *scores=NULL;
218 0 : const char *directory=get_string(confs[OPT_DIRECTORY]);
219 :
220 0 : if(!(lock=lock_alloc_and_init(sdirs->champlock))
221 0 : || build_path_w(sdirs->champlock))
222 : goto end;
223 0 : lock_get(lock);
224 0 : switch(lock->status)
225 : {
226 : case GET_LOCK_GOT:
227 0 : log_fzp_set(sdirs->champlog, confs);
228 : logp("Got champ lock for dedup_group: %s\n",
229 0 : get_string(confs[OPT_DEDUP_GROUP]));
230 : break;
231 : case GET_LOCK_NOT_GOT:
232 : case GET_LOCK_ERROR:
233 : default:
234 : //logp("Did not get champ lock\n");
235 : goto end;
236 : }
237 :
238 0 : if((s=socket(AF_UNIX, SOCK_STREAM, 0))<0)
239 : {
240 0 : logp("socket error in %s: %s\n", __func__, strerror(errno));
241 0 : goto end;
242 : }
243 :
244 : memset(&local, 0, sizeof(struct sockaddr_un));
245 0 : local.sun_family=AF_UNIX;
246 : snprintf(local.sun_path, sizeof(local.sun_path),
247 0 : "%s", sdirs->champsock);
248 0 : len=strlen(local.sun_path)+sizeof(local.sun_family)+1;
249 0 : unlink(sdirs->champsock);
250 0 : if(bind(s, (struct sockaddr *)&local, len)<0)
251 : {
252 0 : logp("bind error in %s: %s\n", __func__, strerror(errno));
253 0 : goto end;
254 : }
255 :
256 0 : if(listen(s, 5)<0)
257 : {
258 0 : logp("listen error in %s: %s\n", __func__, strerror(errno));
259 0 : goto end;
260 : }
261 :
262 0 : if(!(as=async_alloc())
263 0 : || as->init(as, 0)
264 0 : || !(asfd=setup_asfd(as, "champ chooser main socket", &s)))
265 : goto end;
266 0 : asfd->fdtype=ASFD_FD_SERVER_LISTEN_MAIN;
267 0 : asfd->set_timeout(asfd, get_int(confs[OPT_NETWORK_TIMEOUT]));
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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