1 /*
2  * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <sys/types.h>
18 #include <sys/queue.h>
19 #include <sys/tree.h>
20 #include <sys/uio.h>
21 #include <sys/socket.h>
22 #include <sys/stat.h>
23 #include <sys/mman.h>
24 #include <sys/resource.h>
25 
26 #include <ctype.h>
27 #include <endian.h>
28 #include <fcntl.h>
29 #include <fnmatch.h>
30 #include <limits.h>
31 #include <dirent.h>
32 #include <stdlib.h>
33 #include <stdio.h>
34 #include <sha1.h>
35 #include <string.h>
36 #include <time.h>
37 #include <unistd.h>
38 #include <zlib.h>
39 #include <errno.h>
40 #include <libgen.h>
41 #include <stdint.h>
42 #include <imsg.h>
43 #include <uuid.h>
44 
45 #include "bloom.h"
46 
47 #include "got_error.h"
48 #include "got_reference.h"
49 #include "got_repository.h"
50 #include "got_path.h"
51 #include "got_cancel.h"
52 #include "got_object.h"
53 #include "got_opentemp.h"
54 
55 #include "got_lib_delta.h"
56 #include "got_lib_inflate.h"
57 #include "got_lib_object.h"
58 #include "got_lib_object_parse.h"
59 #include "got_lib_object_create.h"
60 #include "got_lib_pack.h"
61 #include "got_lib_privsep.h"
62 #include "got_lib_sha1.h"
63 #include "got_lib_object_cache.h"
64 #include "got_lib_repository.h"
65 #include "got_lib_gotconfig.h"
66 
67 #ifndef nitems
68 #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
69 #endif
70 
71 RB_PROTOTYPE(got_packidx_bloom_filter_tree, got_packidx_bloom_filter, entry,
72     got_packidx_bloom_filter_cmp);
73 
74 const char *
75 got_repo_get_path(struct got_repository *repo)
76 {
77 	return repo->path;
78 }
79 
80 const char *
81 got_repo_get_path_git_dir(struct got_repository *repo)
82 {
83 	return repo->path_git_dir;
84 }
85 
86 int
87 got_repo_get_fd(struct got_repository *repo)
88 {
89 	return repo->gitdir_fd;
90 }
91 
92 const char *
93 got_repo_get_gitconfig_author_name(struct got_repository *repo)
94 {
95 	return repo->gitconfig_author_name;
96 }
97 
98 const char *
99 got_repo_get_gitconfig_author_email(struct got_repository *repo)
100 {
101 	return repo->gitconfig_author_email;
102 }
103 
104 const char *
105 got_repo_get_global_gitconfig_author_name(struct got_repository *repo)
106 {
107 	return repo->global_gitconfig_author_name;
108 }
109 
110 const char *
111 got_repo_get_global_gitconfig_author_email(struct got_repository *repo)
112 {
113 	return repo->global_gitconfig_author_email;
114 }
115 
116 const char *
117 got_repo_get_gitconfig_owner(struct got_repository *repo)
118 {
119 	return repo->gitconfig_owner;
120 }
121 
122 void
123 got_repo_get_gitconfig_extensions(char ***extensions, int *nextensions,
124     struct got_repository *repo)
125 {
126 	*extensions = repo->extensions;
127 	*nextensions = repo->nextensions;
128 }
129 
130 int
131 got_repo_is_bare(struct got_repository *repo)
132 {
133 	return (strcmp(repo->path, repo->path_git_dir) == 0);
134 }
135 
136 static char *
137 get_path_git_child(struct got_repository *repo, const char *basename)
138 {
139 	char *path_child;
140 
141 	if (asprintf(&path_child, "%s/%s", repo->path_git_dir,
142 	    basename) == -1)
143 		return NULL;
144 
145 	return path_child;
146 }
147 
148 char *
149 got_repo_get_path_objects(struct got_repository *repo)
150 {
151 	return get_path_git_child(repo, GOT_OBJECTS_DIR);
152 }
153 
154 char *
155 got_repo_get_path_objects_pack(struct got_repository *repo)
156 {
157 	return get_path_git_child(repo, GOT_OBJECTS_PACK_DIR);
158 }
159 
160 char *
161 got_repo_get_path_refs(struct got_repository *repo)
162 {
163 	return get_path_git_child(repo, GOT_REFS_DIR);
164 }
165 
166 char *
167 got_repo_get_path_packed_refs(struct got_repository *repo)
168 {
169 	return get_path_git_child(repo, GOT_PACKED_REFS_FILE);
170 }
171 
172 static char *
173 get_path_head(struct got_repository *repo)
174 {
175 	return get_path_git_child(repo, GOT_HEAD_FILE);
176 }
177 
178 char *
179 got_repo_get_path_gitconfig(struct got_repository *repo)
180 {
181 	return get_path_git_child(repo, GOT_GITCONFIG);
182 }
183 
184 char *
185 got_repo_get_path_gotconfig(struct got_repository *repo)
186 {
187 	return get_path_git_child(repo, GOT_GOTCONFIG_FILENAME);
188 }
189 
190 const struct got_gotconfig *
191 got_repo_get_gotconfig(struct got_repository *repo)
192 {
193 	return repo->gotconfig;
194 }
195 
196 void
197 got_repo_get_gitconfig_remotes(int *nremotes,
198     const struct got_remote_repo **remotes, struct got_repository *repo)
199 {
200 	*nremotes = repo->ngitconfig_remotes;
201 	*remotes = repo->gitconfig_remotes;
202 }
203 
204 static int
205 is_git_repo(struct got_repository *repo)
206 {
207 	const char *path_git = got_repo_get_path_git_dir(repo);
208 	char *path_objects = got_repo_get_path_objects(repo);
209 	char *path_refs = got_repo_get_path_refs(repo);
210 	char *path_head = get_path_head(repo);
211 	int ret = 0;
212 	struct stat sb;
213 	struct got_reference *head_ref;
214 
215 	if (lstat(path_git, &sb) == -1)
216 		goto done;
217 	if (!S_ISDIR(sb.st_mode))
218 		goto done;
219 
220 	if (lstat(path_objects, &sb) == -1)
221 		goto done;
222 	if (!S_ISDIR(sb.st_mode))
223 		goto done;
224 
225 	if (lstat(path_refs, &sb) == -1)
226 		goto done;
227 	if (!S_ISDIR(sb.st_mode))
228 		goto done;
229 
230 	if (lstat(path_head, &sb) == -1)
231 		goto done;
232 	if (!S_ISREG(sb.st_mode))
233 		goto done;
234 
235 	/* Check if the HEAD reference can be opened. */
236 	if (got_ref_open(&head_ref, repo, GOT_REF_HEAD, 0) != NULL)
237 		goto done;
238 	got_ref_close(head_ref);
239 
240 	ret = 1;
241 done:
242 	free(path_objects);
243 	free(path_refs);
244 	free(path_head);
245 	return ret;
246 
247 }
248 
249 const struct got_error *
250 got_repo_cache_object(struct got_repository *repo, struct got_object_id *id,
251     struct got_object *obj)
252 {
253 #ifndef GOT_NO_OBJ_CACHE
254 	const struct got_error *err = NULL;
255 	err = got_object_cache_add(&repo->objcache, id, obj);
256 	if (err) {
257 		if (err->code == GOT_ERR_OBJ_EXISTS ||
258 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
259 			err = NULL;
260 		return err;
261 	}
262 	obj->refcnt++;
263 #endif
264 	return NULL;
265 }
266 
267 struct got_object *
268 got_repo_get_cached_object(struct got_repository *repo,
269     struct got_object_id *id)
270 {
271 	return (struct got_object *)got_object_cache_get(&repo->objcache, id);
272 }
273 
274 const struct got_error *
275 got_repo_cache_tree(struct got_repository *repo, struct got_object_id *id,
276     struct got_tree_object *tree)
277 {
278 #ifndef GOT_NO_OBJ_CACHE
279 	const struct got_error *err = NULL;
280 	err = got_object_cache_add(&repo->treecache, id, tree);
281 	if (err) {
282 		if (err->code == GOT_ERR_OBJ_EXISTS ||
283 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
284 			err = NULL;
285 		return err;
286 	}
287 	tree->refcnt++;
288 #endif
289 	return NULL;
290 }
291 
292 struct got_tree_object *
293 got_repo_get_cached_tree(struct got_repository *repo,
294     struct got_object_id *id)
295 {
296 	return (struct got_tree_object *)got_object_cache_get(
297 	    &repo->treecache, id);
298 }
299 
300 const struct got_error *
301 got_repo_cache_commit(struct got_repository *repo, struct got_object_id *id,
302     struct got_commit_object *commit)
303 {
304 #ifndef GOT_NO_OBJ_CACHE
305 	const struct got_error *err = NULL;
306 	err = got_object_cache_add(&repo->commitcache, id, commit);
307 	if (err) {
308 		if (err->code == GOT_ERR_OBJ_EXISTS ||
309 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
310 			err = NULL;
311 		return err;
312 	}
313 	commit->refcnt++;
314 #endif
315 	return NULL;
316 }
317 
318 struct got_commit_object *
319 got_repo_get_cached_commit(struct got_repository *repo,
320     struct got_object_id *id)
321 {
322 	return (struct got_commit_object *)got_object_cache_get(
323 	    &repo->commitcache, id);
324 }
325 
326 const struct got_error *
327 got_repo_cache_tag(struct got_repository *repo, struct got_object_id *id,
328     struct got_tag_object *tag)
329 {
330 #ifndef GOT_NO_OBJ_CACHE
331 	const struct got_error *err = NULL;
332 	err = got_object_cache_add(&repo->tagcache, id, tag);
333 	if (err) {
334 		if (err->code == GOT_ERR_OBJ_EXISTS ||
335 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
336 			err = NULL;
337 		return err;
338 	}
339 	tag->refcnt++;
340 #endif
341 	return NULL;
342 }
343 
344 struct got_tag_object *
345 got_repo_get_cached_tag(struct got_repository *repo, struct got_object_id *id)
346 {
347 	return (struct got_tag_object *)got_object_cache_get(
348 	    &repo->tagcache, id);
349 }
350 
351 const struct got_error *
352 got_repo_cache_raw_object(struct got_repository *repo, struct got_object_id *id,
353     struct got_raw_object *raw)
354 {
355 #ifndef GOT_NO_OBJ_CACHE
356 	const struct got_error *err = NULL;
357 	err = got_object_cache_add(&repo->rawcache, id, raw);
358 	if (err) {
359 		if (err->code == GOT_ERR_OBJ_EXISTS ||
360 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
361 			err = NULL;
362 		return err;
363 	}
364 	raw->refcnt++;
365 #endif
366 	return NULL;
367 }
368 
369 
370 struct got_raw_object *
371 got_repo_get_cached_raw_object(struct got_repository *repo,
372     struct got_object_id *id)
373 {
374 	return (struct got_raw_object *)got_object_cache_get(&repo->rawcache, id);
375 }
376 
377 
378 static const struct got_error *
379 open_repo(struct got_repository *repo, const char *path)
380 {
381 	const struct got_error *err = NULL;
382 
383 	repo->gitdir_fd = -1;
384 
385 	/* bare git repository? */
386 	repo->path_git_dir = strdup(path);
387 	if (repo->path_git_dir == NULL)
388 		return got_error_from_errno("strdup");
389 	if (is_git_repo(repo)) {
390 		repo->path = strdup(repo->path_git_dir);
391 		if (repo->path == NULL) {
392 			err = got_error_from_errno("strdup");
393 			goto done;
394 		}
395 		repo->gitdir_fd = open(repo->path_git_dir,
396 		    O_DIRECTORY | O_CLOEXEC);
397 		if (repo->gitdir_fd == -1) {
398 			err = got_error_from_errno2("open",
399 			    repo->path_git_dir);
400 			goto done;
401 		}
402 		return NULL;
403 	}
404 
405 	/* git repository with working tree? */
406 	free(repo->path_git_dir);
407 	repo->path_git_dir = NULL;
408 	if (asprintf(&repo->path_git_dir, "%s/%s", path, GOT_GIT_DIR) == -1) {
409 		err = got_error_from_errno("asprintf");
410 		goto done;
411 	}
412 	if (is_git_repo(repo)) {
413 		repo->path = strdup(path);
414 		if (repo->path == NULL) {
415 			err = got_error_from_errno("strdup");
416 			goto done;
417 		}
418 		repo->gitdir_fd = open(repo->path_git_dir,
419 		    O_DIRECTORY | O_CLOEXEC);
420 		if (repo->gitdir_fd == -1) {
421 			err = got_error_from_errno2("open",
422 			    repo->path_git_dir);
423 			goto done;
424 		}
425 		return NULL;
426 	}
427 
428 	err = got_error(GOT_ERR_NOT_GIT_REPO);
429 done:
430 	if (err) {
431 		free(repo->path);
432 		repo->path = NULL;
433 		free(repo->path_git_dir);
434 		repo->path_git_dir = NULL;
435 		if (repo->gitdir_fd != -1)
436 			close(repo->gitdir_fd);
437 		repo->gitdir_fd = -1;
438 
439 	}
440 	return err;
441 }
442 
443 static const struct got_error *
444 parse_gitconfig_file(int *gitconfig_repository_format_version,
445     char **gitconfig_author_name, char **gitconfig_author_email,
446     struct got_remote_repo **remotes, int *nremotes,
447     char **gitconfig_owner, char ***extensions, int *nextensions,
448     const char *gitconfig_path)
449 {
450 	const struct got_error *err = NULL, *child_err = NULL;
451 	int fd = -1;
452 	int imsg_fds[2] = { -1, -1 };
453 	pid_t pid;
454 	struct imsgbuf *ibuf;
455 
456 	*gitconfig_repository_format_version = 0;
457 	if (extensions)
458 		*extensions = NULL;
459 	if (nextensions)
460 		*nextensions = 0;
461 	*gitconfig_author_name = NULL;
462 	*gitconfig_author_email = NULL;
463 	if (remotes)
464 		*remotes = NULL;
465 	if (nremotes)
466 		*nremotes = 0;
467 	if (gitconfig_owner)
468 		*gitconfig_owner = NULL;
469 
470 	fd = open(gitconfig_path, O_RDONLY | O_CLOEXEC);
471 	if (fd == -1) {
472 		if (errno == ENOENT)
473 			return NULL;
474 		return got_error_from_errno2("open", gitconfig_path);
475 	}
476 
477 	ibuf = calloc(1, sizeof(*ibuf));
478 	if (ibuf == NULL) {
479 		err = got_error_from_errno("calloc");
480 		goto done;
481 	}
482 
483 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fds) == -1) {
484 		err = got_error_from_errno("socketpair");
485 		goto done;
486 	}
487 
488 	pid = fork();
489 	if (pid == -1) {
490 		err = got_error_from_errno("fork");
491 		goto done;
492 	} else if (pid == 0) {
493 		got_privsep_exec_child(imsg_fds, GOT_PATH_PROG_READ_GITCONFIG,
494 		    gitconfig_path);
495 		/* not reached */
496 	}
497 
498 	if (close(imsg_fds[1]) == -1) {
499 		err = got_error_from_errno("close");
500 		goto done;
501 	}
502 	imsg_fds[1] = -1;
503 	imsg_init(ibuf, imsg_fds[0]);
504 
505 	err = got_privsep_send_gitconfig_parse_req(ibuf, fd);
506 	if (err)
507 		goto done;
508 	fd = -1;
509 
510 	err = got_privsep_send_gitconfig_repository_format_version_req(ibuf);
511 	if (err)
512 		goto done;
513 
514 	err = got_privsep_recv_gitconfig_int(
515 	    gitconfig_repository_format_version, ibuf);
516 	if (err)
517 		goto done;
518 
519 	if (extensions && nextensions) {
520 		err = got_privsep_send_gitconfig_repository_extensions_req(
521 		    ibuf);
522 		if (err)
523 			goto done;
524 		err = got_privsep_recv_gitconfig_int(nextensions, ibuf);
525 		if (err)
526 			goto done;
527 		if (*nextensions > 0) {
528 			int i;
529 			*extensions = calloc(*nextensions, sizeof(char *));
530 			if (*extensions == NULL) {
531 				err = got_error_from_errno("calloc");
532 				goto done;
533 			}
534 			for (i = 0; i < *nextensions; i++) {
535 				char *ext;
536 				err = got_privsep_recv_gitconfig_str(&ext,
537 				    ibuf);
538 				if (err)
539 					goto done;
540 				(*extensions)[i] = ext;
541 			}
542 		}
543 	}
544 
545 	err = got_privsep_send_gitconfig_author_name_req(ibuf);
546 	if (err)
547 		goto done;
548 
549 	err = got_privsep_recv_gitconfig_str(gitconfig_author_name, ibuf);
550 	if (err)
551 		goto done;
552 
553 	err = got_privsep_send_gitconfig_author_email_req(ibuf);
554 	if (err)
555 		goto done;
556 
557 	err = got_privsep_recv_gitconfig_str(gitconfig_author_email, ibuf);
558 	if (err)
559 		goto done;
560 
561 	if (remotes && nremotes) {
562 		err = got_privsep_send_gitconfig_remotes_req(ibuf);
563 		if (err)
564 			goto done;
565 
566 		err = got_privsep_recv_gitconfig_remotes(remotes,
567 		    nremotes, ibuf);
568 		if (err)
569 			goto done;
570 	}
571 
572 	if (gitconfig_owner) {
573 		err = got_privsep_send_gitconfig_owner_req(ibuf);
574 		if (err)
575 			goto done;
576 		err = got_privsep_recv_gitconfig_str(gitconfig_owner, ibuf);
577 		if (err)
578 			goto done;
579 	}
580 
581 	err = got_privsep_send_stop(imsg_fds[0]);
582 	child_err = got_privsep_wait_for_child(pid);
583 	if (child_err && err == NULL)
584 		err = child_err;
585 done:
586 	if (imsg_fds[0] != -1 && close(imsg_fds[0]) == -1 && err == NULL)
587 		err = got_error_from_errno("close");
588 	if (imsg_fds[1] != -1 && close(imsg_fds[1]) == -1 && err == NULL)
589 		err = got_error_from_errno("close");
590 	if (fd != -1 && close(fd) == -1 && err == NULL)
591 		err = got_error_from_errno2("close", gitconfig_path);
592 	free(ibuf);
593 	return err;
594 }
595 
596 static const struct got_error *
597 read_gitconfig(struct got_repository *repo, const char *global_gitconfig_path)
598 {
599 	const struct got_error *err = NULL;
600 	char *repo_gitconfig_path = NULL;
601 
602 	if (global_gitconfig_path) {
603 		/* Read settings from ~/.gitconfig. */
604 		int dummy_repo_version;
605 		err = parse_gitconfig_file(&dummy_repo_version,
606 		    &repo->global_gitconfig_author_name,
607 		    &repo->global_gitconfig_author_email,
608 		    NULL, NULL, NULL, NULL, NULL, global_gitconfig_path);
609 		if (err)
610 			return err;
611 	}
612 
613 	/* Read repository's .git/config file. */
614 	repo_gitconfig_path = got_repo_get_path_gitconfig(repo);
615 	if (repo_gitconfig_path == NULL)
616 		return got_error_from_errno("got_repo_get_path_gitconfig");
617 
618 	err = parse_gitconfig_file(&repo->gitconfig_repository_format_version,
619 	    &repo->gitconfig_author_name, &repo->gitconfig_author_email,
620 	    &repo->gitconfig_remotes, &repo->ngitconfig_remotes,
621 	    &repo->gitconfig_owner, &repo->extensions, &repo->nextensions,
622 	    repo_gitconfig_path);
623 	if (err)
624 		goto done;
625 done:
626 	free(repo_gitconfig_path);
627 	return err;
628 }
629 
630 static const struct got_error *
631 read_gotconfig(struct got_repository *repo)
632 {
633 	const struct got_error *err = NULL;
634 	char *gotconfig_path;
635 
636 	gotconfig_path = got_repo_get_path_gotconfig(repo);
637 	if (gotconfig_path == NULL)
638 		return got_error_from_errno("got_repo_get_path_gotconfig");
639 
640 	err = got_gotconfig_read(&repo->gotconfig, gotconfig_path);
641 	free(gotconfig_path);
642 	return err;
643 }
644 
645 /* Supported repository format extensions. */
646 static const char *const repo_extensions[] = {
647 	"noop",			/* Got supports repository format version 1. */
648 	"preciousObjects",	/* Supported by gotadmin cleanup. */
649 	"worktreeConfig",	/* Got does not care about Git work trees. */
650 };
651 
652 const struct got_error *
653 got_repo_open(struct got_repository **repop, const char *path,
654     const char *global_gitconfig_path)
655 {
656 	struct got_repository *repo = NULL;
657 	const struct got_error *err = NULL;
658 	char *repo_path = NULL;
659 	size_t i;
660 	struct rlimit rl;
661 
662 	*repop = NULL;
663 
664 	if (getrlimit(RLIMIT_NOFILE, &rl) == -1)
665 		return got_error_from_errno("getrlimit");
666 
667 	repo = calloc(1, sizeof(*repo));
668 	if (repo == NULL)
669 		return got_error_from_errno("calloc");
670 
671 	RB_INIT(&repo->packidx_bloom_filters);
672 	TAILQ_INIT(&repo->packidx_paths);
673 
674 	for (i = 0; i < nitems(repo->privsep_children); i++) {
675 		memset(&repo->privsep_children[i], 0,
676 		    sizeof(repo->privsep_children[0]));
677 		repo->privsep_children[i].imsg_fd = -1;
678 	}
679 
680 	err = got_object_cache_init(&repo->objcache,
681 	    GOT_OBJECT_CACHE_TYPE_OBJ);
682 	if (err)
683 		goto done;
684 	err = got_object_cache_init(&repo->treecache,
685 	    GOT_OBJECT_CACHE_TYPE_TREE);
686 	if (err)
687 		goto done;
688 	err = got_object_cache_init(&repo->commitcache,
689 	    GOT_OBJECT_CACHE_TYPE_COMMIT);
690 	if (err)
691 		goto done;
692 	err = got_object_cache_init(&repo->tagcache,
693 	    GOT_OBJECT_CACHE_TYPE_TAG);
694 	if (err)
695 		goto done;
696 	err = got_object_cache_init(&repo->rawcache,
697 	    GOT_OBJECT_CACHE_TYPE_RAW);
698 	if (err)
699 		goto done;
700 
701 	repo->pack_cache_size = GOT_PACK_CACHE_SIZE;
702 	if (repo->pack_cache_size > rl.rlim_cur / 8)
703 		repo->pack_cache_size = rl.rlim_cur / 8;
704 	for (i = 0; i < nitems(repo->packs); i++) {
705 		if (i < repo->pack_cache_size) {
706 			repo->packs[i].basefd = got_opentempfd();
707 			if (repo->packs[i].basefd == -1)
708 				return got_error_from_errno("got_opentempfd");
709 			repo->packs[i].accumfd = got_opentempfd();
710 			if (repo->packs[i].accumfd == -1)
711 				return got_error_from_errno("got_opentempfd");
712 		} else {
713 			repo->packs[i].basefd = -1;
714 			repo->packs[i].accumfd = -1;
715 		}
716 	}
717 
718 	repo_path = realpath(path, NULL);
719 	if (repo_path == NULL) {
720 		err = got_error_from_errno2("realpath", path);
721 		goto done;
722 	}
723 
724 	for (;;) {
725 		char *parent_path;
726 
727 		err = open_repo(repo, repo_path);
728 		if (err == NULL)
729 			break;
730 		if (err->code != GOT_ERR_NOT_GIT_REPO)
731 			goto done;
732 		if (repo_path[0] == '/' && repo_path[1] == '\0') {
733 			err = got_error(GOT_ERR_NOT_GIT_REPO);
734 			goto done;
735 		}
736 		err = got_path_dirname(&parent_path, repo_path);
737 		if (err)
738 			goto done;
739 		free(repo_path);
740 		repo_path = parent_path;
741 	}
742 
743 	err = read_gotconfig(repo);
744 	if (err)
745 		goto done;
746 
747 	err = read_gitconfig(repo, global_gitconfig_path);
748 	if (err)
749 		goto done;
750 	if (repo->gitconfig_repository_format_version != 0)
751 		err = got_error_path(path, GOT_ERR_GIT_REPO_FORMAT);
752 	for (i = 0; i < repo->nextensions; i++) {
753 		char *ext = repo->extensions[i];
754 		int j, supported = 0;
755 		for (j = 0; j < nitems(repo_extensions); j++) {
756 			if (strcmp(ext, repo_extensions[j]) == 0) {
757 				supported = 1;
758 				break;
759 			}
760 		}
761 		if (!supported) {
762 			err = got_error_path(ext, GOT_ERR_GIT_REPO_EXT);
763 			goto done;
764 		}
765 	}
766 
767 	err = got_repo_list_packidx(&repo->packidx_paths, repo);
768 done:
769 	if (err)
770 		got_repo_close(repo);
771 	else
772 		*repop = repo;
773 	free(repo_path);
774 	return err;
775 }
776 
777 const struct got_error *
778 got_repo_close(struct got_repository *repo)
779 {
780 	const struct got_error *err = NULL, *child_err;
781 	struct got_packidx_bloom_filter *bf;
782 	struct got_pathlist_entry *pe;
783 	size_t i;
784 
785 	for (i = 0; i < repo->pack_cache_size; i++) {
786 		if (repo->packidx_cache[i] == NULL)
787 			break;
788 		got_packidx_close(repo->packidx_cache[i]);
789 	}
790 
791 	while ((bf = RB_MIN(got_packidx_bloom_filter_tree,
792 	    &repo->packidx_bloom_filters))) {
793 		RB_REMOVE(got_packidx_bloom_filter_tree,
794 		    &repo->packidx_bloom_filters, bf);
795 		free(bf->bloom);
796 		free(bf);
797 	}
798 
799 	for (i = 0; i < repo->pack_cache_size; i++) {
800 		if (repo->packs[i].path_packfile)
801 			got_pack_close(&repo->packs[i]);
802 		if (repo->packs[i].basefd != -1) {
803 			if (close(repo->packs[i].basefd) == -1 && err == NULL)
804 				err = got_error_from_errno("close");
805 			repo->packs[i].basefd = -1;
806 		}
807 		if (repo->packs[i].accumfd != -1) {
808 			if (close(repo->packs[i].accumfd) == -1 && err == NULL)
809 				err = got_error_from_errno("close");
810 			repo->packs[i].accumfd = -1;
811 		}
812 	}
813 
814 	free(repo->path);
815 	free(repo->path_git_dir);
816 
817 	got_object_cache_close(&repo->objcache);
818 	got_object_cache_close(&repo->treecache);
819 	got_object_cache_close(&repo->commitcache);
820 	got_object_cache_close(&repo->tagcache);
821 	got_object_cache_close(&repo->rawcache);
822 
823 	for (i = 0; i < nitems(repo->privsep_children); i++) {
824 		if (repo->privsep_children[i].imsg_fd == -1)
825 			continue;
826 		imsg_clear(repo->privsep_children[i].ibuf);
827 		free(repo->privsep_children[i].ibuf);
828 		err = got_privsep_send_stop(repo->privsep_children[i].imsg_fd);
829 		child_err = got_privsep_wait_for_child(
830 		    repo->privsep_children[i].pid);
831 		if (child_err && err == NULL)
832 			err = child_err;
833 		if (close(repo->privsep_children[i].imsg_fd) == -1 &&
834 		    err == NULL)
835 			err = got_error_from_errno("close");
836 	}
837 
838 	if (repo->gitdir_fd != -1 && close(repo->gitdir_fd) == -1 &&
839 	    err == NULL)
840 		err = got_error_from_errno("close");
841 
842 	if (repo->gotconfig)
843 		got_gotconfig_free(repo->gotconfig);
844 	free(repo->gitconfig_author_name);
845 	free(repo->gitconfig_author_email);
846 	for (i = 0; i < repo->ngitconfig_remotes; i++)
847 		got_repo_free_remote_repo_data(&repo->gitconfig_remotes[i]);
848 	free(repo->gitconfig_remotes);
849 	for (i = 0; i < repo->nextensions; i++)
850 		free(repo->extensions[i]);
851 	free(repo->extensions);
852 
853 	TAILQ_FOREACH(pe, &repo->packidx_paths, entry)
854 		free((void *)pe->path);
855 	got_pathlist_free(&repo->packidx_paths);
856 	free(repo);
857 
858 	return err;
859 }
860 
861 void
862 got_repo_free_remote_repo_data(struct got_remote_repo *repo)
863 {
864 	int i;
865 
866 	free(repo->name);
867 	repo->name = NULL;
868 	free(repo->fetch_url);
869 	repo->fetch_url = NULL;
870 	free(repo->send_url);
871 	repo->send_url = NULL;
872 	for (i = 0; i < repo->nfetch_branches; i++)
873 		free(repo->fetch_branches[i]);
874 	free(repo->fetch_branches);
875 	repo->fetch_branches = NULL;
876 	repo->nfetch_branches = 0;
877 	for (i = 0; i < repo->nsend_branches; i++)
878 		free(repo->send_branches[i]);
879 	free(repo->send_branches);
880 	repo->send_branches = NULL;
881 	repo->nsend_branches = 0;
882 }
883 
884 const struct got_error *
885 got_repo_map_path(char **in_repo_path, struct got_repository *repo,
886     const char *input_path)
887 {
888 	const struct got_error *err = NULL;
889 	const char *repo_abspath = NULL;
890 	size_t repolen, len;
891 	char *canonpath, *path = NULL;
892 
893 	*in_repo_path = NULL;
894 
895 	canonpath = strdup(input_path);
896 	if (canonpath == NULL) {
897 		err = got_error_from_errno("strdup");
898 		goto done;
899 	}
900 	err = got_canonpath(input_path, canonpath, strlen(canonpath) + 1);
901 	if (err)
902 		goto done;
903 
904 	repo_abspath = got_repo_get_path(repo);
905 
906 	if (canonpath[0] == '\0') {
907 		path = strdup(canonpath);
908 		if (path == NULL) {
909 			err = got_error_from_errno("strdup");
910 			goto done;
911 		}
912 	} else {
913 		path = realpath(canonpath, NULL);
914 		if (path == NULL) {
915 			if (errno != ENOENT) {
916 				err = got_error_from_errno2("realpath",
917 				    canonpath);
918 				goto done;
919 			}
920 			/*
921 			 * Path is not on disk.
922 			 * Assume it is already relative to repository root.
923 			 */
924 			path = strdup(canonpath);
925 			if (path == NULL) {
926 				err = got_error_from_errno("strdup");
927 				goto done;
928 			}
929 		}
930 
931 		repolen = strlen(repo_abspath);
932 		len = strlen(path);
933 
934 
935 		if (strcmp(path, repo_abspath) == 0) {
936 			free(path);
937 			path = strdup("");
938 			if (path == NULL) {
939 				err = got_error_from_errno("strdup");
940 				goto done;
941 			}
942 		} else if (len > repolen &&
943 		    got_path_is_child(path, repo_abspath, repolen)) {
944 			/* Matched an on-disk path inside repository. */
945 			if (got_repo_is_bare(repo)) {
946 				/*
947 				 * Matched an on-disk path inside repository
948 				 * database. Treat input as repository-relative.
949 				 */
950 				free(path);
951 				path = canonpath;
952 				canonpath = NULL;
953 			} else {
954 				char *child;
955 				/* Strip common prefix with repository path. */
956 				err = got_path_skip_common_ancestor(&child,
957 				    repo_abspath, path);
958 				if (err)
959 					goto done;
960 				free(path);
961 				path = child;
962 			}
963 		} else {
964 			/*
965 			 * Matched unrelated on-disk path.
966 			 * Treat input as repository-relative.
967 			 */
968 			free(path);
969 			path = canonpath;
970 			canonpath = NULL;
971 		}
972 	}
973 
974 	/* Make in-repository path absolute */
975 	if (path[0] != '/') {
976 		char *abspath;
977 		if (asprintf(&abspath, "/%s", path) == -1) {
978 			err = got_error_from_errno("asprintf");
979 			goto done;
980 		}
981 		free(path);
982 		path = abspath;
983 	}
984 
985 done:
986 	free(canonpath);
987 	if (err)
988 		free(path);
989 	else
990 		*in_repo_path = path;
991 	return err;
992 }
993 
994 static const struct got_error *
995 cache_packidx(struct got_repository *repo, struct got_packidx *packidx,
996     const char *path_packidx)
997 {
998 	const struct got_error *err = NULL;
999 	size_t i;
1000 
1001 	for (i = 0; i < repo->pack_cache_size; i++) {
1002 		if (repo->packidx_cache[i] == NULL)
1003 			break;
1004 		if (strcmp(repo->packidx_cache[i]->path_packidx,
1005 		    path_packidx) == 0) {
1006 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
1007 		}
1008 	}
1009 	if (i == repo->pack_cache_size) {
1010 		i = repo->pack_cache_size - 1;
1011 		err = got_packidx_close(repo->packidx_cache[i]);
1012 		if (err)
1013 			return err;
1014 	}
1015 
1016 	repo->packidx_cache[i] = packidx;
1017 
1018 	return NULL;
1019 }
1020 
1021 int
1022 got_repo_is_packidx_filename(const char *name, size_t len)
1023 {
1024 	if (len != GOT_PACKIDX_NAMELEN)
1025 		return 0;
1026 
1027 	if (strncmp(name, GOT_PACK_PREFIX, strlen(GOT_PACK_PREFIX)) != 0)
1028 		return 0;
1029 
1030 	if (strcmp(name + strlen(GOT_PACK_PREFIX) +
1031 	    SHA1_DIGEST_STRING_LENGTH - 1, GOT_PACKIDX_SUFFIX) != 0)
1032 		return 0;
1033 
1034 	return 1;
1035 }
1036 
1037 static struct got_packidx_bloom_filter *
1038 get_packidx_bloom_filter(struct got_repository *repo,
1039     const char *path, size_t path_len)
1040 {
1041 	struct got_packidx_bloom_filter key;
1042 
1043 	if (strlcpy(key.path, path, sizeof(key.path)) >= sizeof(key.path))
1044 		return NULL; /* XXX */
1045 	key.path_len = path_len;
1046 
1047 	return RB_FIND(got_packidx_bloom_filter_tree,
1048 	    &repo->packidx_bloom_filters, &key);
1049 }
1050 
1051 int
1052 got_repo_check_packidx_bloom_filter(struct got_repository *repo,
1053     const char *path_packidx, struct got_object_id *id)
1054 {
1055 	struct got_packidx_bloom_filter *bf;
1056 
1057 	bf = get_packidx_bloom_filter(repo, path_packidx, strlen(path_packidx));
1058 	if (bf)
1059 		return bloom_check(bf->bloom, id->sha1, sizeof(id->sha1));
1060 
1061 	/* No bloom filter means this pack index must be searched. */
1062 	return 1;
1063 }
1064 
1065 static const struct got_error *
1066 add_packidx_bloom_filter(struct got_repository *repo,
1067     struct got_packidx *packidx, const char *path_packidx)
1068 {
1069 	int i, nobjects = be32toh(packidx->hdr.fanout_table[0xff]);
1070 	struct got_packidx_bloom_filter *bf;
1071 	size_t len;
1072 
1073 	/*
1074 	 * Don't use bloom filters for very large pack index files.
1075 	 * Large pack files will contain a relatively large fraction
1076 	 * of our objects so we will likely need to visit them anyway.
1077 	 * The more objects a pack file contains the higher the probability
1078 	 * of a false-positive match from the bloom filter. And reading
1079 	 * all object IDs from a large pack index file can be expensive.
1080 	 */
1081 	if (nobjects > 100000) /* cut-off at about 2MB, at 20 bytes per ID */
1082 		return NULL;
1083 
1084 	/* Do we already have a filter for this pack index? */
1085 	if (get_packidx_bloom_filter(repo, path_packidx,
1086 	    strlen(path_packidx)) != NULL)
1087 		return NULL;
1088 
1089 	bf = calloc(1, sizeof(*bf));
1090 	if (bf == NULL)
1091 		return got_error_from_errno("calloc");
1092 	bf->bloom = calloc(1, sizeof(*bf->bloom));
1093 	if (bf->bloom == NULL) {
1094 		free(bf);
1095 		return got_error_from_errno("calloc");
1096 	}
1097 	
1098 	len = strlcpy(bf->path, path_packidx, sizeof(bf->path));
1099 	if (len >= sizeof(bf->path)) {
1100 		free(bf->bloom);
1101 		free(bf);
1102 		return got_error(GOT_ERR_NO_SPACE);
1103 	}
1104 	bf->path_len = len;
1105 
1106 	/* Minimum size supported by our bloom filter is 1000 entries. */
1107 	bloom_init(bf->bloom, nobjects < 1000 ? 1000 : nobjects, 0.1);
1108 	for (i = 0; i < nobjects; i++) {
1109 		struct got_packidx_object_id *id;
1110 		id = &packidx->hdr.sorted_ids[i];
1111 		bloom_add(bf->bloom, id->sha1, sizeof(id->sha1));
1112 	}
1113 
1114 	RB_INSERT(got_packidx_bloom_filter_tree,
1115 	    &repo->packidx_bloom_filters, bf);
1116 	return NULL;
1117 }
1118 
1119 const struct got_error *
1120 got_repo_search_packidx(struct got_packidx **packidx, int *idx,
1121     struct got_repository *repo, struct got_object_id *id)
1122 {
1123 	const struct got_error *err;
1124 	struct got_pathlist_entry *pe;
1125 	size_t i;
1126 
1127 	/* Search pack index cache. */
1128 	for (i = 0; i < repo->pack_cache_size; i++) {
1129 		if (repo->packidx_cache[i] == NULL)
1130 			break;
1131 		if (!got_repo_check_packidx_bloom_filter(repo,
1132 		    repo->packidx_cache[i]->path_packidx, id))
1133 			continue; /* object will not be found in this index */
1134 		*idx = got_packidx_get_object_idx(repo->packidx_cache[i], id);
1135 		if (*idx != -1) {
1136 			*packidx = repo->packidx_cache[i];
1137 			/*
1138 			 * Move this cache entry to the front. Repeatedly
1139 			 * searching a wrong pack index can be expensive.
1140 			 */
1141 			if (i > 0) {
1142 				memmove(&repo->packidx_cache[1],
1143 				    &repo->packidx_cache[0],
1144 				    i * sizeof(repo->packidx_cache[0]));
1145 				repo->packidx_cache[0] = *packidx;
1146 			}
1147 			return NULL;
1148 		}
1149 	}
1150 	/* No luck. Search the filesystem. */
1151 
1152 	TAILQ_FOREACH(pe, &repo->packidx_paths, entry) {
1153 		const char *path_packidx = pe->path;
1154 		int is_cached = 0;
1155 
1156 		if (!got_repo_check_packidx_bloom_filter(repo,
1157 		    pe->path, id))
1158 			continue; /* object will not be found in this index */
1159 
1160 		for (i = 0; i < repo->pack_cache_size; i++) {
1161 			if (repo->packidx_cache[i] == NULL)
1162 				break;
1163 			if (strcmp(repo->packidx_cache[i]->path_packidx,
1164 			    path_packidx) == 0) {
1165 				is_cached = 1;
1166 				break;
1167 			}
1168 		}
1169 		if (is_cached)
1170 			continue; /* already searched */
1171 
1172 		err = got_packidx_open(packidx, got_repo_get_fd(repo),
1173 		    path_packidx, 0);
1174 		if (err)
1175 			goto done;
1176 
1177 		err = add_packidx_bloom_filter(repo, *packidx, path_packidx);
1178 		if (err)
1179 			goto done;
1180 
1181 		err = cache_packidx(repo, *packidx, path_packidx);
1182 		if (err)
1183 			goto done;
1184 
1185 		*idx = got_packidx_get_object_idx(*packidx, id);
1186 		if (*idx != -1) {
1187 			err = NULL; /* found the object */
1188 			goto done;
1189 		}
1190 	}
1191 
1192 	err = got_error_no_obj(id);
1193 done:
1194 	return err;
1195 }
1196 
1197 const struct got_error *
1198 got_repo_list_packidx(struct got_pathlist_head *packidx_paths,
1199     struct got_repository *repo)
1200 {
1201 	const struct got_error *err = NULL;
1202 	DIR *packdir = NULL;
1203 	struct dirent *dent;
1204 	char *path_packidx = NULL;
1205 	int packdir_fd;
1206 
1207 	packdir_fd = openat(got_repo_get_fd(repo),
1208 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY | O_CLOEXEC);
1209 	if (packdir_fd == -1) {
1210 		return got_error_from_errno_fmt("openat: %s/%s",
1211 		    got_repo_get_path_git_dir(repo),
1212 		    GOT_OBJECTS_PACK_DIR);
1213 	}
1214 
1215 	packdir = fdopendir(packdir_fd);
1216 	if (packdir == NULL) {
1217 		err = got_error_from_errno("fdopendir");
1218 		goto done;
1219 	}
1220 
1221 	while ((dent = readdir(packdir)) != NULL) {
1222 		if (!got_repo_is_packidx_filename(dent->d_name, dent->d_namlen))
1223 			continue;
1224 
1225 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
1226 		    dent->d_name) == -1) {
1227 			err = got_error_from_errno("asprintf");
1228 			path_packidx = NULL;
1229 			break;
1230 		}
1231 
1232 		err = got_pathlist_append(packidx_paths, path_packidx, NULL);
1233 		if (err)
1234 			break;
1235 	}
1236 done:
1237 	if (err)
1238 		free(path_packidx);
1239 	if (packdir && closedir(packdir) != 0 && err == NULL)
1240 		err = got_error_from_errno("closedir");
1241 	return err;
1242 }
1243 
1244 const struct got_error *
1245 got_repo_get_packidx(struct got_packidx **packidx, const char *path_packidx,
1246     struct got_repository *repo)
1247 {
1248 	const struct got_error *err;
1249 	size_t i;
1250 
1251 	*packidx = NULL;
1252 
1253 	/* Search pack index cache. */
1254 	for (i = 0; i < repo->pack_cache_size; i++) {
1255 		if (repo->packidx_cache[i] == NULL)
1256 			break;
1257 		if (strcmp(repo->packidx_cache[i]->path_packidx,
1258 		    path_packidx) == 0) {
1259 			*packidx = repo->packidx_cache[i];
1260 			return NULL;
1261 		}
1262 	}
1263 	/* No luck. Search the filesystem. */
1264 
1265 	err = got_packidx_open(packidx, got_repo_get_fd(repo),
1266 	    path_packidx, 0);
1267 	if (err)
1268 		return err;
1269 
1270 	err = add_packidx_bloom_filter(repo, *packidx, path_packidx);
1271 	if (err)
1272 		goto done;
1273 
1274 	err = cache_packidx(repo, *packidx, path_packidx);
1275 done:
1276 	if (err) {
1277 		got_packidx_close(*packidx);
1278 		*packidx = NULL;
1279 	}
1280 	return err;
1281 }
1282 
1283 static const struct got_error *
1284 read_packfile_hdr(int fd, struct got_packidx *packidx)
1285 {
1286 	const struct got_error *err = NULL;
1287 	uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
1288 	struct got_packfile_hdr hdr;
1289 	ssize_t n;
1290 
1291 	n = read(fd, &hdr, sizeof(hdr));
1292 	if (n < 0)
1293 		return got_error_from_errno("read");
1294 	if (n != sizeof(hdr))
1295 		return got_error(GOT_ERR_BAD_PACKFILE);
1296 
1297 	if (be32toh(hdr.signature) != GOT_PACKFILE_SIGNATURE ||
1298 	    be32toh(hdr.version) != GOT_PACKFILE_VERSION ||
1299 	    be32toh(hdr.nobjects) != totobj)
1300 		err = got_error(GOT_ERR_BAD_PACKFILE);
1301 
1302 	return err;
1303 }
1304 
1305 static const struct got_error *
1306 open_packfile(int *fd, struct got_repository *repo,
1307     const char *relpath, struct got_packidx *packidx)
1308 {
1309 	const struct got_error *err = NULL;
1310 
1311 	*fd = openat(got_repo_get_fd(repo), relpath,
1312 	    O_RDONLY | O_NOFOLLOW | O_CLOEXEC);
1313 	if (*fd == -1)
1314 		return got_error_from_errno_fmt("openat: %s/%s",
1315 		    got_repo_get_path_git_dir(repo), relpath);
1316 
1317 	if (packidx) {
1318 		err = read_packfile_hdr(*fd, packidx);
1319 		if (err) {
1320 			close(*fd);
1321 			*fd = -1;
1322 		}
1323 	}
1324 
1325 	return err;
1326 }
1327 
1328 const struct got_error *
1329 got_repo_cache_pack(struct got_pack **packp, struct got_repository *repo,
1330     const char *path_packfile, struct got_packidx *packidx)
1331 {
1332 	const struct got_error *err = NULL;
1333 	struct got_pack *pack = NULL;
1334 	struct stat sb;
1335 	size_t i;
1336 
1337 	if (packp)
1338 		*packp = NULL;
1339 
1340 	for (i = 0; i < repo->pack_cache_size; i++) {
1341 		pack = &repo->packs[i];
1342 		if (pack->path_packfile == NULL)
1343 			break;
1344 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1345 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
1346 	}
1347 
1348 	if (i == repo->pack_cache_size) {
1349 		struct got_pack tmp;
1350 		err = got_pack_close(&repo->packs[i - 1]);
1351 		if (err)
1352 			return err;
1353 		if (ftruncate(repo->packs[i - 1].basefd, 0L) == -1)
1354 			return got_error_from_errno("ftruncate");
1355 		if (ftruncate(repo->packs[i - 1].accumfd, 0L) == -1)
1356 			return got_error_from_errno("ftruncate");
1357 		memcpy(&tmp, &repo->packs[i - 1], sizeof(tmp)); 
1358 		memcpy(&repo->packs[i - 1], &repo->packs[0],
1359 		    sizeof(repo->packs[i - 1]));
1360 		memcpy(&repo->packs[0], &tmp, sizeof(repo->packs[0]));
1361 		i = 0;
1362 	}
1363 
1364 	pack = &repo->packs[i];
1365 
1366 	pack->path_packfile = strdup(path_packfile);
1367 	if (pack->path_packfile == NULL) {
1368 		err = got_error_from_errno("strdup");
1369 		goto done;
1370 	}
1371 
1372 	err = open_packfile(&pack->fd, repo, path_packfile, packidx);
1373 	if (err)
1374 		goto done;
1375 
1376 	if (fstat(pack->fd, &sb) != 0) {
1377 		err = got_error_from_errno("fstat");
1378 		goto done;
1379 	}
1380 	pack->filesize = sb.st_size;
1381 
1382 	pack->privsep_child = NULL;
1383 
1384 #ifndef GOT_PACK_NO_MMAP
1385 	pack->map = mmap(NULL, pack->filesize, PROT_READ, MAP_PRIVATE,
1386 	    pack->fd, 0);
1387 	if (pack->map == MAP_FAILED) {
1388 		if (errno != ENOMEM) {
1389 			err = got_error_from_errno("mmap");
1390 			goto done;
1391 		}
1392 		pack->map = NULL; /* fall back to read(2) */
1393 	}
1394 #endif
1395 done:
1396 	if (err) {
1397 		if (pack) {
1398 			free(pack->path_packfile);
1399 			memset(pack, 0, sizeof(*pack));
1400 		}
1401 	} else if (packp)
1402 		*packp = pack;
1403 	return err;
1404 }
1405 
1406 struct got_pack *
1407 got_repo_get_cached_pack(struct got_repository *repo, const char *path_packfile)
1408 {
1409 	struct got_pack *pack = NULL;
1410 	size_t i;
1411 
1412 	for (i = 0; i < repo->pack_cache_size; i++) {
1413 		pack = &repo->packs[i];
1414 		if (pack->path_packfile == NULL)
1415 			break;
1416 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1417 			return pack;
1418 	}
1419 
1420 	return NULL;
1421 }
1422 
1423 const struct got_error *
1424 got_repo_init(const char *repo_path)
1425 {
1426 	const struct got_error *err = NULL;
1427 	const char *dirnames[] = {
1428 		GOT_OBJECTS_DIR,
1429 		GOT_OBJECTS_PACK_DIR,
1430 		GOT_REFS_DIR,
1431 	};
1432 	const char *description_str = "Unnamed repository; "
1433 	    "edit this file 'description' to name the repository.";
1434 	const char *headref_str = "ref: refs/heads/main";
1435 	const char *gitconfig_str = "[core]\n"
1436 	    "\trepositoryformatversion = 0\n"
1437 	    "\tfilemode = true\n"
1438 	    "\tbare = true\n";
1439 	char *path;
1440 	size_t i;
1441 
1442 	if (!got_path_dir_is_empty(repo_path))
1443 		return got_error(GOT_ERR_DIR_NOT_EMPTY);
1444 
1445 	for (i = 0; i < nitems(dirnames); i++) {
1446 		if (asprintf(&path, "%s/%s", repo_path, dirnames[i]) == -1) {
1447 			return got_error_from_errno("asprintf");
1448 		}
1449 		err = got_path_mkdir(path);
1450 		free(path);
1451 		if (err)
1452 			return err;
1453 	}
1454 
1455 	if (asprintf(&path, "%s/%s", repo_path, "description") == -1)
1456 		return got_error_from_errno("asprintf");
1457 	err = got_path_create_file(path, description_str);
1458 	free(path);
1459 	if (err)
1460 		return err;
1461 
1462 	if (asprintf(&path, "%s/%s", repo_path, GOT_HEAD_FILE) == -1)
1463 		return got_error_from_errno("asprintf");
1464 	err = got_path_create_file(path, headref_str);
1465 	free(path);
1466 	if (err)
1467 		return err;
1468 
1469 	if (asprintf(&path, "%s/%s", repo_path, "config") == -1)
1470 		return got_error_from_errno("asprintf");
1471 	err = got_path_create_file(path, gitconfig_str);
1472 	free(path);
1473 	if (err)
1474 		return err;
1475 
1476 	return NULL;
1477 }
1478 
1479 static const struct got_error *
1480 match_packed_object(struct got_object_id **unique_id,
1481     struct got_repository *repo, const char *id_str_prefix, int obj_type)
1482 {
1483 	const struct got_error *err = NULL;
1484 	struct got_object_id_queue matched_ids;
1485 	struct got_pathlist_entry *pe;
1486 
1487 	STAILQ_INIT(&matched_ids);
1488 
1489 	TAILQ_FOREACH(pe, &repo->packidx_paths, entry) {
1490 		const char *path_packidx = pe->path;
1491 		struct got_packidx *packidx;
1492 		struct got_object_qid *qid;
1493 
1494 		err = got_packidx_open(&packidx, got_repo_get_fd(repo),
1495 		    path_packidx, 0);
1496 		if (err)
1497 			break;
1498 
1499 		err = got_packidx_match_id_str_prefix(&matched_ids,
1500 		    packidx, id_str_prefix);
1501 		if (err) {
1502 			got_packidx_close(packidx);
1503 			break;
1504 		}
1505 		err = got_packidx_close(packidx);
1506 		if (err)
1507 			break;
1508 
1509 		STAILQ_FOREACH(qid, &matched_ids, entry) {
1510 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1511 				int matched_type;
1512 				err = got_object_get_type(&matched_type, repo,
1513 				    &qid->id);
1514 				if (err)
1515 					goto done;
1516 				if (matched_type != obj_type)
1517 					continue;
1518 			}
1519 			if (*unique_id == NULL) {
1520 				*unique_id = got_object_id_dup(&qid->id);
1521 				if (*unique_id == NULL) {
1522 					err = got_error_from_errno("malloc");
1523 					goto done;
1524 				}
1525 			} else {
1526 				if (got_object_id_cmp(*unique_id,
1527 				    &qid->id) == 0)
1528 					continue; /* packed multiple times */
1529 				err = got_error(GOT_ERR_AMBIGUOUS_ID);
1530 				goto done;
1531 			}
1532 		}
1533 	}
1534 done:
1535 	got_object_id_queue_free(&matched_ids);
1536 	if (err) {
1537 		free(*unique_id);
1538 		*unique_id = NULL;
1539 	}
1540 	return err;
1541 }
1542 
1543 static const struct got_error *
1544 match_loose_object(struct got_object_id **unique_id, const char *path_objects,
1545     const char *object_dir, const char *id_str_prefix, int obj_type,
1546     struct got_repository *repo)
1547 {
1548 	const struct got_error *err = NULL;
1549 	char *path;
1550 	DIR *dir = NULL;
1551 	struct dirent *dent;
1552 	struct got_object_id id;
1553 
1554 	if (asprintf(&path, "%s/%s", path_objects, object_dir) == -1) {
1555 		err = got_error_from_errno("asprintf");
1556 		goto done;
1557 	}
1558 
1559 	dir = opendir(path);
1560 	if (dir == NULL) {
1561 		if (errno == ENOENT) {
1562 			err = NULL;
1563 			goto done;
1564 		}
1565 		err = got_error_from_errno2("opendir", path);
1566 		goto done;
1567 	}
1568 	while ((dent = readdir(dir)) != NULL) {
1569 		char *id_str;
1570 		int cmp;
1571 
1572 		if (strcmp(dent->d_name, ".") == 0 ||
1573 		    strcmp(dent->d_name, "..") == 0)
1574 			continue;
1575 
1576 		if (asprintf(&id_str, "%s%s", object_dir, dent->d_name) == -1) {
1577 			err = got_error_from_errno("asprintf");
1578 			goto done;
1579 		}
1580 
1581 		if (!got_parse_sha1_digest(id.sha1, id_str))
1582 			continue;
1583 
1584 		/*
1585 		 * Directory entries do not necessarily appear in
1586 		 * sorted order, so we must iterate over all of them.
1587 		 */
1588 		cmp = strncmp(id_str, id_str_prefix, strlen(id_str_prefix));
1589 		if (cmp != 0) {
1590 			free(id_str);
1591 			continue;
1592 		}
1593 
1594 		if (*unique_id == NULL) {
1595 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1596 				int matched_type;
1597 				err = got_object_get_type(&matched_type, repo,
1598 				    &id);
1599 				if (err)
1600 					goto done;
1601 				if (matched_type != obj_type)
1602 					continue;
1603 			}
1604 			*unique_id = got_object_id_dup(&id);
1605 			if (*unique_id == NULL) {
1606 				err = got_error_from_errno("got_object_id_dup");
1607 				free(id_str);
1608 				goto done;
1609 			}
1610 		} else {
1611 			if (got_object_id_cmp(*unique_id, &id) == 0)
1612 				continue; /* both packed and loose */
1613 			err = got_error(GOT_ERR_AMBIGUOUS_ID);
1614 			free(id_str);
1615 			goto done;
1616 		}
1617 	}
1618 done:
1619 	if (dir && closedir(dir) != 0 && err == NULL)
1620 		err = got_error_from_errno("closedir");
1621 	if (err) {
1622 		free(*unique_id);
1623 		*unique_id = NULL;
1624 	}
1625 	free(path);
1626 	return err;
1627 }
1628 
1629 const struct got_error *
1630 got_repo_match_object_id_prefix(struct got_object_id **id,
1631     const char *id_str_prefix, int obj_type, struct got_repository *repo)
1632 {
1633 	const struct got_error *err = NULL;
1634 	char *path_objects = got_repo_get_path_objects(repo);
1635 	char *object_dir = NULL;
1636 	size_t len;
1637 	int i;
1638 
1639 	*id = NULL;
1640 
1641 	len = strlen(id_str_prefix);
1642 	if (len > SHA1_DIGEST_STRING_LENGTH - 1)
1643 		return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1644 
1645 	for (i = 0; i < len; i++) {
1646 		if (isxdigit((unsigned char)id_str_prefix[i]))
1647 			continue;
1648 		return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1649 	}
1650 
1651 	if (len >= 2) {
1652 		err = match_packed_object(id, repo, id_str_prefix, obj_type);
1653 		if (err)
1654 			goto done;
1655 		object_dir = strndup(id_str_prefix, 2);
1656 		if (object_dir == NULL) {
1657 			err = got_error_from_errno("strdup");
1658 			goto done;
1659 		}
1660 		err = match_loose_object(id, path_objects, object_dir,
1661 		    id_str_prefix, obj_type, repo);
1662 	} else if (len == 1) {
1663 		int i;
1664 		for (i = 0; i < 0xf; i++) {
1665 			if (asprintf(&object_dir, "%s%.1x", id_str_prefix, i)
1666 			    == -1) {
1667 				err = got_error_from_errno("asprintf");
1668 				goto done;
1669 			}
1670 			err = match_packed_object(id, repo, object_dir,
1671 			    obj_type);
1672 			if (err)
1673 				goto done;
1674 			err = match_loose_object(id, path_objects, object_dir,
1675 			    id_str_prefix, obj_type, repo);
1676 			if (err)
1677 				goto done;
1678 		}
1679 	} else {
1680 		err = got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1681 		goto done;
1682 	}
1683 done:
1684 	free(object_dir);
1685 	if (err) {
1686 		free(*id);
1687 		*id = NULL;
1688 	} else if (*id == NULL) {
1689 		switch (obj_type) {
1690 		case GOT_OBJ_TYPE_BLOB:
1691 			err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1692 			    GOT_OBJ_LABEL_BLOB, id_str_prefix);
1693 			break;
1694 		case GOT_OBJ_TYPE_TREE:
1695 			err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1696 			    GOT_OBJ_LABEL_TREE, id_str_prefix);
1697 			break;
1698 		case GOT_OBJ_TYPE_COMMIT:
1699 			err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1700 			    GOT_OBJ_LABEL_COMMIT, id_str_prefix);
1701 			break;
1702 		case GOT_OBJ_TYPE_TAG:
1703 			err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1704 			    GOT_OBJ_LABEL_TAG, id_str_prefix);
1705 			break;
1706 		default:
1707 			err = got_error_path(id_str_prefix, GOT_ERR_NO_OBJ);
1708 			break;
1709 		}
1710 	}
1711 
1712 	return err;
1713 }
1714 
1715 const struct got_error *
1716 got_repo_match_object_id(struct got_object_id **id, char **label,
1717     const char *id_str, int obj_type, struct got_reflist_head *refs,
1718     struct got_repository *repo)
1719 {
1720 	const struct got_error *err;
1721 	struct got_tag_object *tag;
1722 	struct got_reference *ref = NULL;
1723 
1724 	*id = NULL;
1725 	if (label)
1726 		*label = NULL;
1727 
1728 	if (refs) {
1729 		err = got_repo_object_match_tag(&tag, id_str, obj_type,
1730 		    refs, repo);
1731 		if (err == NULL) {
1732 			*id = got_object_id_dup(
1733 			    got_object_tag_get_object_id(tag));
1734 			if (*id == NULL)
1735 				err = got_error_from_errno("got_object_id_dup");
1736 			else if (label && asprintf(label, "refs/tags/%s",
1737 			    got_object_tag_get_name(tag)) == -1) {
1738 				err = got_error_from_errno("asprintf");
1739 				free(*id);
1740 				*id = NULL;
1741 			}
1742 			got_object_tag_close(tag);
1743 			return err;
1744 		} else if (err->code != GOT_ERR_OBJ_TYPE &&
1745 		    err->code != GOT_ERR_NO_OBJ)
1746 			return err;
1747 	}
1748 
1749 	err = got_ref_open(&ref, repo, id_str, 0);
1750 	if (err == NULL) {
1751 		err = got_ref_resolve(id, repo, ref);
1752 		if (err)
1753 			goto done;
1754 		if (label) {
1755 			*label = strdup(got_ref_get_name(ref));
1756 			if (*label == NULL) {
1757 				err = got_error_from_errno("strdup");
1758 				goto done;
1759 			}
1760 		}
1761 	} else {
1762 		if (err->code != GOT_ERR_NOT_REF &&
1763 		    err->code != GOT_ERR_BAD_REF_NAME)
1764 			goto done;
1765 		err = got_repo_match_object_id_prefix(id, id_str,
1766 		    obj_type, repo);
1767 		if (err) {
1768 			if (err->code == GOT_ERR_BAD_OBJ_ID_STR)
1769 				err = got_error_not_ref(id_str);
1770 			goto done;
1771 		}
1772 		if (label) {
1773 			err = got_object_id_str(label, *id);
1774 			if (*label == NULL) {
1775 				err = got_error_from_errno("strdup");
1776 				goto done;
1777 			}
1778 		}
1779 	}
1780 done:
1781 	if (ref)
1782 		got_ref_close(ref);
1783 	return err;
1784 }
1785 
1786 const struct got_error *
1787 got_repo_object_match_tag(struct got_tag_object **tag, const char *name,
1788     int obj_type, struct got_reflist_head *refs, struct got_repository *repo)
1789 {
1790 	const struct got_error *err = NULL;
1791 	struct got_reflist_entry *re;
1792 	struct got_object_id *tag_id;
1793 	int name_is_absolute = (strncmp(name, "refs/", 5) == 0);
1794 
1795 	*tag = NULL;
1796 
1797 	TAILQ_FOREACH(re, refs, entry) {
1798 		const char *refname;
1799 		refname = got_ref_get_name(re->ref);
1800 		if (got_ref_is_symbolic(re->ref))
1801 			continue;
1802 		if (strncmp(refname, "refs/tags/", 10) != 0)
1803 			continue;
1804 		if (!name_is_absolute)
1805 			refname += strlen("refs/tags/");
1806 		if (strcmp(refname, name) != 0)
1807 			continue;
1808 		err = got_ref_resolve(&tag_id, repo, re->ref);
1809 		if (err)
1810 			break;
1811 		err = got_object_open_as_tag(tag, repo, tag_id);
1812 		free(tag_id);
1813 		if (err)
1814 			break;
1815 		if (obj_type == GOT_OBJ_TYPE_ANY ||
1816 		    got_object_tag_get_object_type(*tag) == obj_type)
1817 			break;
1818 		got_object_tag_close(*tag);
1819 		*tag = NULL;
1820 	}
1821 
1822 	if (err == NULL && *tag == NULL)
1823 		err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1824 		    GOT_OBJ_LABEL_TAG, name);
1825 	return err;
1826 }
1827 
1828 static const struct got_error *
1829 alloc_added_blob_tree_entry(struct got_tree_entry **new_te,
1830     const char *name, mode_t mode, struct got_object_id *blob_id)
1831 {
1832 	const struct got_error *err = NULL;
1833 
1834 	 *new_te = NULL;
1835 
1836 	*new_te = calloc(1, sizeof(**new_te));
1837 	if (*new_te == NULL)
1838 		return got_error_from_errno("calloc");
1839 
1840 	if (strlcpy((*new_te)->name, name, sizeof((*new_te)->name)) >=
1841 	    sizeof((*new_te)->name)) {
1842 		err = got_error(GOT_ERR_NO_SPACE);
1843 		goto done;
1844 	}
1845 
1846 	if (S_ISLNK(mode)) {
1847 		(*new_te)->mode = S_IFLNK;
1848 	} else {
1849 		(*new_te)->mode = S_IFREG;
1850 		(*new_te)->mode |= (mode & (S_IRWXU | S_IRWXG | S_IRWXO));
1851 	}
1852 	memcpy(&(*new_te)->id, blob_id, sizeof((*new_te)->id));
1853 done:
1854 	if (err && *new_te) {
1855 		free(*new_te);
1856 		*new_te = NULL;
1857 	}
1858 	return err;
1859 }
1860 
1861 static const struct got_error *
1862 import_file(struct got_tree_entry **new_te, struct dirent *de,
1863     const char *path, struct got_repository *repo)
1864 {
1865 	const struct got_error *err;
1866 	struct got_object_id *blob_id = NULL;
1867 	char *filepath;
1868 	struct stat sb;
1869 
1870 	if (asprintf(&filepath, "%s%s%s", path,
1871 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
1872 		return got_error_from_errno("asprintf");
1873 
1874 	if (lstat(filepath, &sb) != 0) {
1875 		err = got_error_from_errno2("lstat", path);
1876 		goto done;
1877 	}
1878 
1879 	err = got_object_blob_create(&blob_id, filepath, repo);
1880 	if (err)
1881 		goto done;
1882 
1883 	err = alloc_added_blob_tree_entry(new_te, de->d_name, sb.st_mode,
1884 	    blob_id);
1885 done:
1886 	free(filepath);
1887 	if (err)
1888 		free(blob_id);
1889 	return err;
1890 }
1891 
1892 static const struct got_error *
1893 insert_tree_entry(struct got_tree_entry *new_te,
1894     struct got_pathlist_head *paths)
1895 {
1896 	const struct got_error *err = NULL;
1897 	struct got_pathlist_entry *new_pe;
1898 
1899 	err = got_pathlist_insert(&new_pe, paths, new_te->name, new_te);
1900 	if (err)
1901 		return err;
1902 	if (new_pe == NULL)
1903 		return got_error(GOT_ERR_TREE_DUP_ENTRY);
1904 	return NULL;
1905 }
1906 
1907 static const struct got_error *write_tree(struct got_object_id **,
1908     const char *, struct got_pathlist_head *, struct got_repository *,
1909     got_repo_import_cb progress_cb, void *progress_arg);
1910 
1911 static const struct got_error *
1912 import_subdir(struct got_tree_entry **new_te, struct dirent *de,
1913     const char *path, struct got_pathlist_head *ignores,
1914     struct got_repository *repo,
1915     got_repo_import_cb progress_cb, void *progress_arg)
1916 {
1917 	const struct got_error *err;
1918 	struct got_object_id *id = NULL;
1919 	char *subdirpath;
1920 
1921 	if (asprintf(&subdirpath, "%s%s%s", path,
1922 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
1923 		return got_error_from_errno("asprintf");
1924 
1925 	(*new_te) = calloc(1, sizeof(**new_te));
1926 	if (*new_te == NULL)
1927 		return got_error_from_errno("calloc");
1928 	(*new_te)->mode = S_IFDIR;
1929 	if (strlcpy((*new_te)->name, de->d_name, sizeof((*new_te)->name)) >=
1930 	    sizeof((*new_te)->name)) {
1931 		err = got_error(GOT_ERR_NO_SPACE);
1932 		goto done;
1933 	}
1934 	err = write_tree(&id, subdirpath, ignores,  repo,
1935 	    progress_cb, progress_arg);
1936 	if (err)
1937 		goto done;
1938 	memcpy(&(*new_te)->id, id, sizeof((*new_te)->id));
1939 	
1940 done:
1941 	free(id);
1942 	free(subdirpath);
1943 	if (err) {
1944 		free(*new_te);
1945 		*new_te = NULL;
1946 	}
1947 	return err;
1948 }
1949 
1950 static const struct got_error *
1951 write_tree(struct got_object_id **new_tree_id, const char *path_dir,
1952     struct got_pathlist_head *ignores, struct got_repository *repo,
1953     got_repo_import_cb progress_cb, void *progress_arg)
1954 {
1955 	const struct got_error *err = NULL;
1956 	DIR *dir;
1957 	struct dirent *de;
1958 	int nentries;
1959 	struct got_tree_entry *new_te = NULL;
1960 	struct got_pathlist_head paths;
1961 	struct got_pathlist_entry *pe;
1962 
1963 	*new_tree_id = NULL;
1964 
1965 	TAILQ_INIT(&paths);
1966 
1967 	dir = opendir(path_dir);
1968 	if (dir == NULL) {
1969 		err = got_error_from_errno2("opendir", path_dir);
1970 		goto done;
1971 	}
1972 
1973 	nentries = 0;
1974 	while ((de = readdir(dir)) != NULL) {
1975 		int ignore = 0;
1976 		int type;
1977 
1978 		if (strcmp(de->d_name, ".") == 0 ||
1979 		    strcmp(de->d_name, "..") == 0)
1980 			continue;
1981 
1982 		TAILQ_FOREACH(pe, ignores, entry) {
1983 			if (fnmatch(pe->path, de->d_name, 0) == 0) {
1984 				ignore = 1;
1985 				break;
1986 			}
1987 		}
1988 		if (ignore)
1989 			continue;
1990 
1991 		err = got_path_dirent_type(&type, path_dir, de);
1992 		if (err)
1993 			goto done;
1994 
1995 		if (type == DT_DIR) {
1996 			err = import_subdir(&new_te, de, path_dir,
1997 			    ignores, repo, progress_cb, progress_arg);
1998 			if (err) {
1999 				if (err->code != GOT_ERR_NO_TREE_ENTRY)
2000 					goto done;
2001 				err = NULL;
2002 				continue;
2003 			}
2004 		} else if (type == DT_REG || type == DT_LNK) {
2005 			err = import_file(&new_te, de, path_dir, repo);
2006 			if (err)
2007 				goto done;
2008 		} else
2009 			continue;
2010 
2011 		err = insert_tree_entry(new_te, &paths);
2012 		if (err)
2013 			goto done;
2014 		nentries++;
2015 	}
2016 
2017 	if (TAILQ_EMPTY(&paths)) {
2018 		err = got_error_msg(GOT_ERR_NO_TREE_ENTRY,
2019 		    "cannot create tree without any entries");
2020 		goto done;
2021 	}
2022 
2023 	TAILQ_FOREACH(pe, &paths, entry) {
2024 		struct got_tree_entry *te = pe->data;
2025 		char *path;
2026 		if (!S_ISREG(te->mode) && !S_ISLNK(te->mode))
2027 			continue;
2028 		if (asprintf(&path, "%s/%s", path_dir, pe->path) == -1) {
2029 			err = got_error_from_errno("asprintf");
2030 			goto done;
2031 		}
2032 		err = (*progress_cb)(progress_arg, path);
2033 		free(path);
2034 		if (err)
2035 			goto done;
2036 	}
2037 
2038 	err = got_object_tree_create(new_tree_id, &paths, nentries, repo);
2039 done:
2040 	if (dir)
2041 		closedir(dir);
2042 	got_pathlist_free(&paths);
2043 	return err;
2044 }
2045 
2046 const struct got_error *
2047 got_repo_import(struct got_object_id **new_commit_id, const char *path_dir,
2048     const char *logmsg, const char *author, struct got_pathlist_head *ignores,
2049     struct got_repository *repo, got_repo_import_cb progress_cb,
2050     void *progress_arg)
2051 {
2052 	const struct got_error *err;
2053 	struct got_object_id *new_tree_id;
2054 
2055 	err = write_tree(&new_tree_id, path_dir, ignores, repo,
2056 	    progress_cb, progress_arg);
2057 	if (err)
2058 		return err;
2059 
2060 	err = got_object_commit_create(new_commit_id, new_tree_id, NULL, 0,
2061 	    author, time(NULL), author, time(NULL), logmsg, repo);
2062 	free(new_tree_id);
2063 	return err;
2064 }
2065 
2066 const struct got_error *
2067 got_repo_get_loose_object_info(int *nobjects, off_t *ondisk_size,
2068     struct got_repository *repo)
2069 {
2070 	const struct got_error *err = NULL;
2071 	char *path_objects = NULL, *path = NULL;
2072 	DIR *dir = NULL;
2073 	struct got_object_id id;
2074 	int i;
2075 
2076 	*nobjects = 0;
2077 	*ondisk_size = 0;
2078 
2079 	path_objects = got_repo_get_path_objects(repo);
2080 	if (path_objects == NULL)
2081 		return got_error_from_errno("got_repo_get_path_objects");
2082 
2083 	for (i = 0; i <= 0xff; i++) {
2084 		struct dirent *dent;
2085 
2086 		if (asprintf(&path, "%s/%.2x", path_objects, i) == -1) {
2087 			err = got_error_from_errno("asprintf");
2088 			break;
2089 		}
2090 
2091 		dir = opendir(path);
2092 		if (dir == NULL) {
2093 			if (errno == ENOENT) {
2094 				err = NULL;
2095 				continue;
2096 			}
2097 			err = got_error_from_errno2("opendir", path);
2098 			break;
2099 		}
2100 
2101 		while ((dent = readdir(dir)) != NULL) {
2102 			char *id_str;
2103 			int fd;
2104 			struct stat sb;
2105 
2106 			if (strcmp(dent->d_name, ".") == 0 ||
2107 			    strcmp(dent->d_name, "..") == 0)
2108 				continue;
2109 
2110 			if (asprintf(&id_str, "%.2x%s", i, dent->d_name) == -1) {
2111 				err = got_error_from_errno("asprintf");
2112 				goto done;
2113 			}
2114 
2115 			if (!got_parse_sha1_digest(id.sha1, id_str)) {
2116 				free(id_str);
2117 				continue;
2118 			}
2119 			free(id_str);
2120 
2121 			err = got_object_open_loose_fd(&fd, &id, repo);
2122 			if (err)
2123 				goto done;
2124 
2125 			if (fstat(fd, &sb) == -1) {
2126 				err = got_error_from_errno("fstat");
2127 				close(fd);
2128 				goto done;
2129 			}
2130 			(*nobjects)++;
2131 			(*ondisk_size) += sb.st_size;
2132 
2133 			if (close(fd) == -1) {
2134 				err = got_error_from_errno("close");
2135 				goto done;
2136 			}
2137 		}
2138 
2139 		if (closedir(dir) != 0) {
2140 			err = got_error_from_errno("closedir");
2141 			goto done;
2142 		}
2143 		dir = NULL;
2144 
2145 		free(path);
2146 		path = NULL;
2147 	}
2148 done:
2149 	if (dir && closedir(dir) != 0 && err == NULL)
2150 		err = got_error_from_errno("closedir");
2151 
2152 	if (err) {
2153 		*nobjects = 0;
2154 		*ondisk_size = 0;
2155 	}
2156 	free(path_objects);
2157 	free(path);
2158 	return err;
2159 }
2160 
2161 const struct got_error *
2162 got_repo_get_packfile_info(int *npackfiles, int *nobjects,
2163     off_t *total_packsize, struct got_repository *repo)
2164 {
2165 	const struct got_error *err = NULL;
2166 	DIR *packdir = NULL;
2167 	struct dirent *dent;
2168 	struct got_packidx *packidx = NULL;
2169 	char *path_packidx;
2170 	char *path_packfile;
2171 	int packdir_fd;
2172 	struct stat sb;
2173 
2174 	*npackfiles = 0;
2175 	*nobjects = 0;
2176 	*total_packsize = 0;
2177 
2178 	packdir_fd = openat(got_repo_get_fd(repo),
2179 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY);
2180 	if (packdir_fd == -1) {
2181 		return got_error_from_errno_fmt("openat: %s/%s",
2182 		    got_repo_get_path_git_dir(repo),
2183 		    GOT_OBJECTS_PACK_DIR);
2184 	}
2185 
2186 	packdir = fdopendir(packdir_fd);
2187 	if (packdir == NULL) {
2188 		err = got_error_from_errno("fdopendir");
2189 		goto done;
2190 	}
2191 
2192 	while ((dent = readdir(packdir)) != NULL) {
2193 		if (!got_repo_is_packidx_filename(dent->d_name, dent->d_namlen))
2194 			continue;
2195 
2196 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
2197 		    dent->d_name) == -1) {
2198 			err = got_error_from_errno("asprintf");
2199 			goto done;
2200 		}
2201 
2202 		err = got_packidx_open(&packidx, got_repo_get_fd(repo),
2203 		    path_packidx, 0);
2204 		free(path_packidx);
2205 		if (err)
2206 			goto done;
2207 
2208 		if (fstat(packidx->fd, &sb) == -1)
2209 			goto done;
2210 		*total_packsize += sb.st_size;
2211 
2212 		err = got_packidx_get_packfile_path(&path_packfile,
2213 		    packidx->path_packidx);
2214 		if (err)
2215 			goto done;
2216 
2217 		if (fstatat(got_repo_get_fd(repo), path_packfile, &sb,
2218 		    0) == -1) {
2219 			free(path_packfile);
2220 			goto done;
2221 		}
2222 		free(path_packfile);
2223 		*total_packsize += sb.st_size;
2224 
2225 		*nobjects += be32toh(packidx->hdr.fanout_table[0xff]);
2226 
2227 		(*npackfiles)++;
2228 
2229 		got_packidx_close(packidx);
2230 		packidx = NULL;
2231 	}
2232 done:
2233 	if (packidx)
2234 		got_packidx_close(packidx);
2235 	if (packdir && closedir(packdir) != 0 && err == NULL)
2236 		err = got_error_from_errno("closedir");
2237 	if (err) {
2238 		*npackfiles = 0;
2239 		*nobjects = 0;
2240 		*total_packsize = 0;
2241 	}
2242 	return err;
2243 }
2244 
2245 RB_GENERATE(got_packidx_bloom_filter_tree, got_packidx_bloom_filter, entry,
2246     got_packidx_bloom_filter_cmp);