Gotweb

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Date:: Sun Oct 23 14:38:32 2022 UTC
Message:: introduce gotd(8), a Git repository server reachable via ssh(1) This is an initial barebones implementation which provides the absolute minimum of functionality required to serve got(1) and git(1) clients. Basic fetch/send functionality has been tested and seems to work here, but this server is not yet expected to be stable. More testing is welcome. See the man pages for setup instructions. The current design uses one reader and one writer process per repository, which will have to be extended to N readers and N writers in the future. At startup, each process will chroot(2) into its assigned repository. This works because gotd(8) can only be started as root, and will then fork+exec, chroot, and privdrop. At present the parent process runs with the following pledge(2) promises: "stdio rpath wpath cpath proc getpw sendfd recvfd fattr flock unix unveil" The parent is the only process able to modify the repository in a way that becomes visible to Git clients. The parent uses unveil(2) to restrict its view of the filesystem to /tmp and the repositories listed in the configuration file gotd.conf(5). Per-repository chroot(2) processes use "stdio rpath sendfd recvfd". The writer defers to the parent for modifying references in the repository to point at newly uploaded commits. The reader is fine without such help, because Git repositories can be read without having to create any lock-files. gotd(8) requires a dedicated user ID, which should own repositories on the filesystem, and a separate secondary group, which should not have filesystem-level repository access, and must be allowed access to the gotd(8) socket. To obtain Git repository access, users must be members of this secondary group, and must have their login shell set to gotsh(1). gotsh(1) connects to the gotd(8) socket and speaks Git-protocol towards the client on the other end of the SSH connection. gotsh(1) is not an interactive command shell. At present, authenticated clients are granted read/write access to all repositories and all references (except for the "refs/got/" and the "refs/remotes/" namespaces, which are already being protected from modification). While complicated access control mechanism are not a design goal, making it possible to safely offer anonymous Git repository access over ssh(1) is on the road map.
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  1 3efd8e31 2022-10-23 thomas /*
  2 3efd8e31 2022-10-23 thomas  * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
  3 3efd8e31 2022-10-23 thomas  *
  4 3efd8e31 2022-10-23 thomas  * Permission to use, copy, modify, and distribute this software for any
  5 3efd8e31 2022-10-23 thomas  * purpose with or without fee is hereby granted, provided that the above
  6 3efd8e31 2022-10-23 thomas  * copyright notice and this permission notice appear in all copies.
  7 3efd8e31 2022-10-23 thomas  *
  8 3efd8e31 2022-10-23 thomas  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 3efd8e31 2022-10-23 thomas  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 3efd8e31 2022-10-23 thomas  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 3efd8e31 2022-10-23 thomas  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 3efd8e31 2022-10-23 thomas  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 3efd8e31 2022-10-23 thomas  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 3efd8e31 2022-10-23 thomas  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 3efd8e31 2022-10-23 thomas  */
 16 3efd8e31 2022-10-23 thomas 
 17 3efd8e31 2022-10-23 thomas #include <sys/queue.h>
 18 3efd8e31 2022-10-23 thomas #include <sys/tree.h>
 19 3efd8e31 2022-10-23 thomas #include <sys/stat.h>
 20 3efd8e31 2022-10-23 thomas 
 21 3efd8e31 2022-10-23 thomas #include <errno.h>
 22 3efd8e31 2022-10-23 thomas #include <limits.h>
 23 3efd8e31 2022-10-23 thomas #include <sha1.h>
 24 3efd8e31 2022-10-23 thomas #include <stdio.h>
 25 3efd8e31 2022-10-23 thomas #include <stdlib.h>
 26 3efd8e31 2022-10-23 thomas #include <string.h>
 27 3efd8e31 2022-10-23 thomas #include <unistd.h>
 28 3efd8e31 2022-10-23 thomas 
 29 3efd8e31 2022-10-23 thomas #include "got_error.h"
 30 3efd8e31 2022-10-23 thomas #include "got_object.h"
 31 3efd8e31 2022-10-23 thomas #include "got_repository.h"
 32 3efd8e31 2022-10-23 thomas #include "got_path.h"
 33 3efd8e31 2022-10-23 thomas 
 34 3efd8e31 2022-10-23 thomas #include "got_lib_delta.h"
 35 3efd8e31 2022-10-23 thomas #include "got_lib_object.h"
 36 3efd8e31 2022-10-23 thomas #include "got_lib_object_cache.h"
 37 3efd8e31 2022-10-23 thomas #include "got_lib_object_parse.h"
 38 3efd8e31 2022-10-23 thomas #include "got_lib_pack.h"
 39 3efd8e31 2022-10-23 thomas #include "got_lib_repository.h"
 40 3efd8e31 2022-10-23 thomas 
 41 3efd8e31 2022-10-23 thomas const struct got_error *
 42 3efd8e31 2022-10-23 thomas got_object_open_packed(struct got_object **obj, struct got_object_id *id,
 43 3efd8e31 2022-10-23 thomas     struct got_repository *repo)
 44 3efd8e31 2022-10-23 thomas {
 45 3efd8e31 2022-10-23 thomas 	const struct got_error *err = NULL;
 46 3efd8e31 2022-10-23 thomas 	struct got_pack *pack = NULL;
 47 3efd8e31 2022-10-23 thomas 	struct got_packidx *packidx = NULL;
 48 3efd8e31 2022-10-23 thomas 	int idx;
 49 3efd8e31 2022-10-23 thomas 	char *path_packfile;
 50 3efd8e31 2022-10-23 thomas 
 51 3efd8e31 2022-10-23 thomas 	err = got_repo_search_packidx(&packidx, &idx, repo, id);
 52 3efd8e31 2022-10-23 thomas 	if (err)
 53 3efd8e31 2022-10-23 thomas 		return err;
 54 3efd8e31 2022-10-23 thomas 
 55 3efd8e31 2022-10-23 thomas 	err = got_packidx_get_packfile_path(&path_packfile,
 56 3efd8e31 2022-10-23 thomas 	    packidx->path_packidx);
 57 3efd8e31 2022-10-23 thomas 	if (err)
 58 3efd8e31 2022-10-23 thomas 		return err;
 59 3efd8e31 2022-10-23 thomas 
 60 3efd8e31 2022-10-23 thomas 	pack = got_repo_get_cached_pack(repo, path_packfile);
 61 3efd8e31 2022-10-23 thomas 	if (pack == NULL) {
 62 3efd8e31 2022-10-23 thomas 		err = got_repo_cache_pack(&pack, repo, path_packfile, packidx);
 63 3efd8e31 2022-10-23 thomas 		if (err)
 64 3efd8e31 2022-10-23 thomas 			goto done;
 65 3efd8e31 2022-10-23 thomas 	}
 66 3efd8e31 2022-10-23 thomas 
 67 3efd8e31 2022-10-23 thomas 	err = got_packfile_open_object(obj, pack, packidx, idx, id);
 68 3efd8e31 2022-10-23 thomas 	if (err)
 69 3efd8e31 2022-10-23 thomas 		return err;
 70 3efd8e31 2022-10-23 thomas 	(*obj)->refcnt++;
 71 3efd8e31 2022-10-23 thomas 
 72 3efd8e31 2022-10-23 thomas 	err = got_repo_cache_object(repo, id, *obj);
 73 3efd8e31 2022-10-23 thomas 	if (err) {
 74 3efd8e31 2022-10-23 thomas 		if (err->code == GOT_ERR_OBJ_EXISTS ||
 75 3efd8e31 2022-10-23 thomas 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
 76 3efd8e31 2022-10-23 thomas 			err = NULL;
 77 3efd8e31 2022-10-23 thomas 	}
 78 3efd8e31 2022-10-23 thomas done:
 79 3efd8e31 2022-10-23 thomas 	free(path_packfile);
 80 3efd8e31 2022-10-23 thomas 	return err;
 81 3efd8e31 2022-10-23 thomas }
 82 3efd8e31 2022-10-23 thomas 
 83 3efd8e31 2022-10-23 thomas const struct got_error *
 84 3efd8e31 2022-10-23 thomas got_object_open_from_packfile(struct got_object **obj, struct got_object_id *id,
 85 3efd8e31 2022-10-23 thomas     struct got_pack *pack, struct got_packidx *packidx, int obj_idx,
 86 3efd8e31 2022-10-23 thomas     struct got_repository *repo)
 87 3efd8e31 2022-10-23 thomas {
 88 3efd8e31 2022-10-23 thomas 	return got_error(GOT_ERR_NOT_IMPL);
 89 3efd8e31 2022-10-23 thomas }
 90 3efd8e31 2022-10-23 thomas 
 91 3efd8e31 2022-10-23 thomas const struct got_error *
 92 3efd8e31 2022-10-23 thomas got_object_read_raw_delta(uint64_t *base_size, uint64_t *result_size,
 93 3efd8e31 2022-10-23 thomas     off_t *delta_size, off_t *delta_compressed_size, off_t *delta_offset,
 94 3efd8e31 2022-10-23 thomas     off_t *delta_out_offset, struct got_object_id **base_id, int delta_cache_fd,
 95 3efd8e31 2022-10-23 thomas     struct got_packidx *packidx, int obj_idx, struct got_object_id *id,
 96 3efd8e31 2022-10-23 thomas     struct got_repository *repo)
 97 3efd8e31 2022-10-23 thomas {
 98 3efd8e31 2022-10-23 thomas 	return got_error(GOT_ERR_NOT_IMPL);
 99 3efd8e31 2022-10-23 thomas }
100 3efd8e31 2022-10-23 thomas 
101 3efd8e31 2022-10-23 thomas const struct got_error *
102 3efd8e31 2022-10-23 thomas got_object_open(struct got_object **obj, struct got_repository *repo,
103 3efd8e31 2022-10-23 thomas     struct got_object_id *id)
104 3efd8e31 2022-10-23 thomas {
105 3efd8e31 2022-10-23 thomas 	const struct got_error *err = NULL;
106 3efd8e31 2022-10-23 thomas 	int fd;
107 3efd8e31 2022-10-23 thomas 
108 3efd8e31 2022-10-23 thomas 	*obj = got_repo_get_cached_object(repo, id);
109 3efd8e31 2022-10-23 thomas 	if (*obj != NULL) {
110 3efd8e31 2022-10-23 thomas 		(*obj)->refcnt++;
111 3efd8e31 2022-10-23 thomas 		return NULL;
112 3efd8e31 2022-10-23 thomas 	}
113 3efd8e31 2022-10-23 thomas 
114 3efd8e31 2022-10-23 thomas 	err = got_object_open_packed(obj, id, repo);
115 3efd8e31 2022-10-23 thomas 	if (err) {
116 3efd8e31 2022-10-23 thomas 		if (err->code != GOT_ERR_NO_OBJ)
117 3efd8e31 2022-10-23 thomas 			return err;
118 3efd8e31 2022-10-23 thomas 	} else
119 3efd8e31 2022-10-23 thomas 		return NULL;
120 3efd8e31 2022-10-23 thomas 
121 3efd8e31 2022-10-23 thomas 	err = got_object_open_loose_fd(&fd, id, repo);
122 3efd8e31 2022-10-23 thomas 	if (err) {
123 3efd8e31 2022-10-23 thomas 		if (err->code == GOT_ERR_ERRNO && errno == ENOENT)
124 3efd8e31 2022-10-23 thomas 			err = got_error_no_obj(id);
125 3efd8e31 2022-10-23 thomas 		return err;
126 3efd8e31 2022-10-23 thomas 	}
127 3efd8e31 2022-10-23 thomas 
128 3efd8e31 2022-10-23 thomas 	err = got_object_read_header(obj, fd);
129 3efd8e31 2022-10-23 thomas 	if (err)
130 3efd8e31 2022-10-23 thomas 		goto done;
131 3efd8e31 2022-10-23 thomas 
132 3efd8e31 2022-10-23 thomas 	memcpy(&(*obj)->id, id, sizeof((*obj)->id));
133 3efd8e31 2022-10-23 thomas 	(*obj)->refcnt++;
134 3efd8e31 2022-10-23 thomas 
135 3efd8e31 2022-10-23 thomas 	err = got_repo_cache_object(repo, id, *obj);
136 3efd8e31 2022-10-23 thomas 	if (err) {
137 3efd8e31 2022-10-23 thomas 		if (err->code == GOT_ERR_OBJ_EXISTS ||
138 3efd8e31 2022-10-23 thomas 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
139 3efd8e31 2022-10-23 thomas 			err = NULL;
140 3efd8e31 2022-10-23 thomas 	}
141 3efd8e31 2022-10-23 thomas done:
142 3efd8e31 2022-10-23 thomas 	if (close(fd) == -1 && err == NULL)
143 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("close");
144 3efd8e31 2022-10-23 thomas 	return err;
145 3efd8e31 2022-10-23 thomas }
146 3efd8e31 2022-10-23 thomas 
147 3efd8e31 2022-10-23 thomas static const struct got_error *
148 3efd8e31 2022-10-23 thomas wrap_fd(FILE **f, int wrapped_fd)
149 3efd8e31 2022-10-23 thomas {
150 3efd8e31 2022-10-23 thomas 	const struct got_error *err = NULL;
151 3efd8e31 2022-10-23 thomas 	int fd;
152 3efd8e31 2022-10-23 thomas 
153 3efd8e31 2022-10-23 thomas 	if (ftruncate(wrapped_fd, 0L) == -1)
154 3efd8e31 2022-10-23 thomas 		return got_error_from_errno("ftruncate");
155 3efd8e31 2022-10-23 thomas 
156 3efd8e31 2022-10-23 thomas 	if (lseek(wrapped_fd, 0L, SEEK_SET) == -1)
157 3efd8e31 2022-10-23 thomas 		return got_error_from_errno("lseek");
158 3efd8e31 2022-10-23 thomas 
159 3efd8e31 2022-10-23 thomas 	fd = dup(wrapped_fd);
160 3efd8e31 2022-10-23 thomas 	if (fd == -1)
161 3efd8e31 2022-10-23 thomas 		return got_error_from_errno("dup");
162 3efd8e31 2022-10-23 thomas 
163 3efd8e31 2022-10-23 thomas 	*f = fdopen(fd, "w+");
164 3efd8e31 2022-10-23 thomas 	if (*f == NULL) {
165 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("fdopen");
166 3efd8e31 2022-10-23 thomas 		close(fd);
167 3efd8e31 2022-10-23 thomas 	}
168 3efd8e31 2022-10-23 thomas 	return err;
169 3efd8e31 2022-10-23 thomas }
170 3efd8e31 2022-10-23 thomas 
171 3efd8e31 2022-10-23 thomas static const struct got_error *
172 3efd8e31 2022-10-23 thomas read_packed_object_raw(uint8_t **outbuf, off_t *size, size_t *hdrlen,
173 3efd8e31 2022-10-23 thomas     int outfd, struct got_pack *pack, struct got_packidx *packidx, int idx,
174 3efd8e31 2022-10-23 thomas     struct got_object_id *id)
175 3efd8e31 2022-10-23 thomas {
176 3efd8e31 2022-10-23 thomas 	const struct got_error *err = NULL;
177 3efd8e31 2022-10-23 thomas 	uint64_t raw_size = 0;
178 3efd8e31 2022-10-23 thomas 	struct got_object *obj;
179 3efd8e31 2022-10-23 thomas 	FILE *outfile = NULL, *basefile = NULL, *accumfile = NULL;
180 3efd8e31 2022-10-23 thomas 
181 3efd8e31 2022-10-23 thomas 	*outbuf = NULL;
182 3efd8e31 2022-10-23 thomas 	*size = 0;
183 3efd8e31 2022-10-23 thomas 	*hdrlen = 0;
184 3efd8e31 2022-10-23 thomas 
185 3efd8e31 2022-10-23 thomas 	err = got_packfile_open_object(&obj, pack, packidx, idx, id);
186 3efd8e31 2022-10-23 thomas 	if (err)
187 3efd8e31 2022-10-23 thomas 		return err;
188 3efd8e31 2022-10-23 thomas 
189 3efd8e31 2022-10-23 thomas 	if (obj->flags & GOT_OBJ_FLAG_DELTIFIED) {
190 3efd8e31 2022-10-23 thomas 		err = got_pack_get_max_delta_object_size(&raw_size, obj, pack);
191 3efd8e31 2022-10-23 thomas 		if (err)
192 3efd8e31 2022-10-23 thomas 			goto done;
193 3efd8e31 2022-10-23 thomas 	} else
194 3efd8e31 2022-10-23 thomas 		raw_size = obj->size;
195 3efd8e31 2022-10-23 thomas 
196 3efd8e31 2022-10-23 thomas 	if (raw_size <= GOT_DELTA_RESULT_SIZE_CACHED_MAX) {
197 3efd8e31 2022-10-23 thomas 		size_t len;
198 3efd8e31 2022-10-23 thomas 		err = got_packfile_extract_object_to_mem(outbuf, &len,
199 3efd8e31 2022-10-23 thomas 		    obj, pack);
200 3efd8e31 2022-10-23 thomas 		if (err)
201 3efd8e31 2022-10-23 thomas 			goto done;
202 3efd8e31 2022-10-23 thomas 		*size = (off_t)len;
203 3efd8e31 2022-10-23 thomas 	} else {
204 3efd8e31 2022-10-23 thomas 		/*
205 3efd8e31 2022-10-23 thomas 		 * XXX This uses 3 file extra descriptors for no good reason.
206 3efd8e31 2022-10-23 thomas 		 * We should have got_packfile_extract_object_to_fd().
207 3efd8e31 2022-10-23 thomas 		 */
208 3efd8e31 2022-10-23 thomas 		err = wrap_fd(&outfile, outfd);
209 3efd8e31 2022-10-23 thomas 		if (err)
210 3efd8e31 2022-10-23 thomas 			goto done;
211 3efd8e31 2022-10-23 thomas 		err = wrap_fd(&basefile, pack->basefd);
212 3efd8e31 2022-10-23 thomas 		if (err)
213 3efd8e31 2022-10-23 thomas 			goto done;
214 3efd8e31 2022-10-23 thomas 		err = wrap_fd(&accumfile, pack->accumfd);
215 3efd8e31 2022-10-23 thomas 		if (err)
216 3efd8e31 2022-10-23 thomas 			goto done;
217 3efd8e31 2022-10-23 thomas 		err = got_packfile_extract_object(pack, obj, outfile, basefile,
218 3efd8e31 2022-10-23 thomas 		    accumfile);
219 3efd8e31 2022-10-23 thomas 		if (err)
220 3efd8e31 2022-10-23 thomas 			goto done;
221 3efd8e31 2022-10-23 thomas 	}
222 3efd8e31 2022-10-23 thomas 
223 3efd8e31 2022-10-23 thomas 	*hdrlen = obj->hdrlen;
224 3efd8e31 2022-10-23 thomas done:
225 3efd8e31 2022-10-23 thomas 	got_object_close(obj);
226 3efd8e31 2022-10-23 thomas 	if (outfile && fclose(outfile) == EOF && err == NULL)
227 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("fclose");
228 3efd8e31 2022-10-23 thomas 	if (basefile && fclose(basefile) == EOF && err == NULL)
229 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("fclose");
230 3efd8e31 2022-10-23 thomas 	if (accumfile && fclose(accumfile) == EOF && err == NULL)
231 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("fclose");
232 3efd8e31 2022-10-23 thomas 	return err;
233 3efd8e31 2022-10-23 thomas 
234 3efd8e31 2022-10-23 thomas }
235 3efd8e31 2022-10-23 thomas 
236 3efd8e31 2022-10-23 thomas static void
237 3efd8e31 2022-10-23 thomas put_raw_object_tempfile(struct got_raw_object *obj)
238 3efd8e31 2022-10-23 thomas {
239 3efd8e31 2022-10-23 thomas 	struct got_repository *repo = obj->close_arg;
240 3efd8e31 2022-10-23 thomas 
241 3efd8e31 2022-10-23 thomas 	if (obj->tempfile_idx != -1)
242 3efd8e31 2022-10-23 thomas 		got_repo_temp_fds_put(obj->tempfile_idx, repo);
243 3efd8e31 2022-10-23 thomas }
244 3efd8e31 2022-10-23 thomas 
245 3efd8e31 2022-10-23 thomas /* *outfd must be initialized to -1 by caller */
246 3efd8e31 2022-10-23 thomas const struct got_error *
247 3efd8e31 2022-10-23 thomas got_object_raw_open(struct got_raw_object **obj, int *outfd,
248 3efd8e31 2022-10-23 thomas     struct got_repository *repo, struct got_object_id *id)
249 3efd8e31 2022-10-23 thomas {
250 3efd8e31 2022-10-23 thomas 	const struct got_error *err = NULL;
251 3efd8e31 2022-10-23 thomas 	struct got_packidx *packidx = NULL;
252 3efd8e31 2022-10-23 thomas 	int idx, tempfile_idx = -1;
253 3efd8e31 2022-10-23 thomas 	uint8_t *outbuf = NULL;
254 3efd8e31 2022-10-23 thomas 	off_t size = 0;
255 3efd8e31 2022-10-23 thomas 	size_t hdrlen = 0;
256 3efd8e31 2022-10-23 thomas 	char *path_packfile = NULL;
257 3efd8e31 2022-10-23 thomas 
258 3efd8e31 2022-10-23 thomas 	*obj = got_repo_get_cached_raw_object(repo, id);
259 3efd8e31 2022-10-23 thomas 	if (*obj != NULL) {
260 3efd8e31 2022-10-23 thomas 		(*obj)->refcnt++;
261 3efd8e31 2022-10-23 thomas 		return NULL;
262 3efd8e31 2022-10-23 thomas 	}
263 3efd8e31 2022-10-23 thomas 
264 3efd8e31 2022-10-23 thomas 	if (*outfd == -1) {
265 3efd8e31 2022-10-23 thomas 		int tempfd;
266 3efd8e31 2022-10-23 thomas 
267 3efd8e31 2022-10-23 thomas 		err = got_repo_temp_fds_get(&tempfd, &tempfile_idx, repo);
268 3efd8e31 2022-10-23 thomas 		if (err)
269 3efd8e31 2022-10-23 thomas 			return err;
270 3efd8e31 2022-10-23 thomas 
271 3efd8e31 2022-10-23 thomas 		/* Duplicate tempfile descriptor to allow use of fdopen(3). */
272 3efd8e31 2022-10-23 thomas 		*outfd = dup(tempfd);
273 3efd8e31 2022-10-23 thomas 		if (*outfd == -1) {
274 3efd8e31 2022-10-23 thomas 			got_repo_temp_fds_put(tempfile_idx, repo);
275 3efd8e31 2022-10-23 thomas 			return got_error_from_errno("dup");
276 3efd8e31 2022-10-23 thomas 		}
277 3efd8e31 2022-10-23 thomas 	}
278 3efd8e31 2022-10-23 thomas 
279 3efd8e31 2022-10-23 thomas 	err = got_repo_search_packidx(&packidx, &idx, repo, id);
280 3efd8e31 2022-10-23 thomas 	if (err == NULL) {
281 3efd8e31 2022-10-23 thomas 		struct got_pack *pack = NULL;
282 3efd8e31 2022-10-23 thomas 
283 3efd8e31 2022-10-23 thomas 		err = got_packidx_get_packfile_path(&path_packfile,
284 3efd8e31 2022-10-23 thomas 		    packidx->path_packidx);
285 3efd8e31 2022-10-23 thomas 		if (err)
286 3efd8e31 2022-10-23 thomas 			goto done;
287 3efd8e31 2022-10-23 thomas 
288 3efd8e31 2022-10-23 thomas 		pack = got_repo_get_cached_pack(repo, path_packfile);
289 3efd8e31 2022-10-23 thomas 		if (pack == NULL) {
290 3efd8e31 2022-10-23 thomas 			err = got_repo_cache_pack(&pack, repo, path_packfile,
291 3efd8e31 2022-10-23 thomas 			    packidx);
292 3efd8e31 2022-10-23 thomas 			if (err)
293 3efd8e31 2022-10-23 thomas 				goto done;
294 3efd8e31 2022-10-23 thomas 		}
295 3efd8e31 2022-10-23 thomas 		err = read_packed_object_raw(&outbuf, &size, &hdrlen,
296 3efd8e31 2022-10-23 thomas 		    *outfd, pack, packidx, idx, id);
297 3efd8e31 2022-10-23 thomas 		if (err)
298 3efd8e31 2022-10-23 thomas 			goto done;
299 3efd8e31 2022-10-23 thomas 	} else if (err->code == GOT_ERR_NO_OBJ) {
300 3efd8e31 2022-10-23 thomas 		int fd;
301 3efd8e31 2022-10-23 thomas 
302 3efd8e31 2022-10-23 thomas 		err = got_object_open_loose_fd(&fd, id, repo);
303 3efd8e31 2022-10-23 thomas 		if (err)
304 3efd8e31 2022-10-23 thomas 			goto done;
305 3efd8e31 2022-10-23 thomas 		err = got_object_read_raw(&outbuf, &size, &hdrlen,
306 3efd8e31 2022-10-23 thomas 		    GOT_DELTA_RESULT_SIZE_CACHED_MAX, *outfd, id, fd);
307 3efd8e31 2022-10-23 thomas 		if (close(fd) == -1 && err == NULL)
308 3efd8e31 2022-10-23 thomas 			err = got_error_from_errno("close");
309 3efd8e31 2022-10-23 thomas 		if (err)
310 3efd8e31 2022-10-23 thomas 			goto done;
311 3efd8e31 2022-10-23 thomas 	}
312 3efd8e31 2022-10-23 thomas 
313 3efd8e31 2022-10-23 thomas 	err = got_object_raw_alloc(obj, outbuf, outfd, hdrlen, size);
314 3efd8e31 2022-10-23 thomas 	if (err)
315 3efd8e31 2022-10-23 thomas 		goto done;
316 3efd8e31 2022-10-23 thomas 
317 3efd8e31 2022-10-23 thomas 	err = got_repo_cache_raw_object(repo, id, *obj);
318 3efd8e31 2022-10-23 thomas 	if (err) {
319 3efd8e31 2022-10-23 thomas 		if (err->code == GOT_ERR_OBJ_EXISTS ||
320 3efd8e31 2022-10-23 thomas 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
321 3efd8e31 2022-10-23 thomas 			err = NULL;
322 3efd8e31 2022-10-23 thomas 	}
323 3efd8e31 2022-10-23 thomas done:
324 3efd8e31 2022-10-23 thomas 	free(path_packfile);
325 3efd8e31 2022-10-23 thomas 	if (err) {
326 3efd8e31 2022-10-23 thomas 		if (*obj) {
327 3efd8e31 2022-10-23 thomas 			got_object_raw_close(*obj);
328 3efd8e31 2022-10-23 thomas 			*obj = NULL;
329 3efd8e31 2022-10-23 thomas 		}
330 3efd8e31 2022-10-23 thomas 		free(outbuf);
331 3efd8e31 2022-10-23 thomas 		if (tempfile_idx != -1)
332 3efd8e31 2022-10-23 thomas 			got_repo_temp_fds_put(tempfile_idx, repo);
333 3efd8e31 2022-10-23 thomas 	} else {
334 3efd8e31 2022-10-23 thomas 		(*obj)->tempfile_idx = tempfile_idx;
335 3efd8e31 2022-10-23 thomas 		(*obj)->close_cb = put_raw_object_tempfile;
336 3efd8e31 2022-10-23 thomas 		(*obj)->close_arg = repo;
337 3efd8e31 2022-10-23 thomas 	}
338 3efd8e31 2022-10-23 thomas 	return err;
339 3efd8e31 2022-10-23 thomas }
340 3efd8e31 2022-10-23 thomas 
341 3efd8e31 2022-10-23 thomas static const struct got_error *
342 3efd8e31 2022-10-23 thomas open_commit(struct got_commit_object **commit,
343 3efd8e31 2022-10-23 thomas     struct got_repository *repo, struct got_object_id *id, int check_cache)
344 3efd8e31 2022-10-23 thomas {
345 3efd8e31 2022-10-23 thomas 	const struct got_error *err = NULL;
346 3efd8e31 2022-10-23 thomas 	struct got_packidx *packidx = NULL;
347 3efd8e31 2022-10-23 thomas 	int idx;
348 3efd8e31 2022-10-23 thomas 	char *path_packfile = NULL;
349 3efd8e31 2022-10-23 thomas 
350 3efd8e31 2022-10-23 thomas 	if (check_cache) {
351 3efd8e31 2022-10-23 thomas 		*commit = got_repo_get_cached_commit(repo, id);
352 3efd8e31 2022-10-23 thomas 		if (*commit != NULL) {
353 3efd8e31 2022-10-23 thomas 			(*commit)->refcnt++;
354 3efd8e31 2022-10-23 thomas 			return NULL;
355 3efd8e31 2022-10-23 thomas 		}
356 3efd8e31 2022-10-23 thomas 	} else
357 3efd8e31 2022-10-23 thomas 		*commit = NULL;
358 3efd8e31 2022-10-23 thomas 
359 3efd8e31 2022-10-23 thomas 	err = got_repo_search_packidx(&packidx, &idx, repo, id);
360 3efd8e31 2022-10-23 thomas 	if (err == NULL) {
361 3efd8e31 2022-10-23 thomas 		struct got_pack *pack = NULL;
362 3efd8e31 2022-10-23 thomas 		struct got_object *obj;
363 3efd8e31 2022-10-23 thomas 		uint8_t *buf;
364 3efd8e31 2022-10-23 thomas 		size_t len;
365 3efd8e31 2022-10-23 thomas 
366 3efd8e31 2022-10-23 thomas 		err = got_packidx_get_packfile_path(&path_packfile,
367 3efd8e31 2022-10-23 thomas 		    packidx->path_packidx);
368 3efd8e31 2022-10-23 thomas 		if (err)
369 3efd8e31 2022-10-23 thomas 			return err;
370 3efd8e31 2022-10-23 thomas 
371 3efd8e31 2022-10-23 thomas 		pack = got_repo_get_cached_pack(repo, path_packfile);
372 3efd8e31 2022-10-23 thomas 		if (pack == NULL) {
373 3efd8e31 2022-10-23 thomas 			err = got_repo_cache_pack(&pack, repo, path_packfile,
374 3efd8e31 2022-10-23 thomas 			    packidx);
375 3efd8e31 2022-10-23 thomas 			if (err)
376 3efd8e31 2022-10-23 thomas 				goto done;
377 3efd8e31 2022-10-23 thomas 		}
378 3efd8e31 2022-10-23 thomas 		err = got_packfile_open_object(&obj, pack, packidx, idx, id);
379 3efd8e31 2022-10-23 thomas 		if (err)
380 3efd8e31 2022-10-23 thomas 			goto done;
381 3efd8e31 2022-10-23 thomas 		err = got_packfile_extract_object_to_mem(&buf, &len,
382 3efd8e31 2022-10-23 thomas 		    obj, pack);
383 3efd8e31 2022-10-23 thomas 		got_object_close(obj);
384 3efd8e31 2022-10-23 thomas 		if (err)
385 3efd8e31 2022-10-23 thomas 			goto done;
386 3efd8e31 2022-10-23 thomas 		err = got_object_parse_commit(commit, buf, len);
387 3efd8e31 2022-10-23 thomas 		free(buf);
388 3efd8e31 2022-10-23 thomas 	} else if (err->code == GOT_ERR_NO_OBJ) {
389 3efd8e31 2022-10-23 thomas 		int fd;
390 3efd8e31 2022-10-23 thomas 
391 3efd8e31 2022-10-23 thomas 		err = got_object_open_loose_fd(&fd, id, repo);
392 3efd8e31 2022-10-23 thomas 		if (err)
393 3efd8e31 2022-10-23 thomas 			return err;
394 3efd8e31 2022-10-23 thomas 		err = got_object_read_commit(commit, fd, id, 0);
395 3efd8e31 2022-10-23 thomas 		if (close(fd) == -1 && err == NULL)
396 3efd8e31 2022-10-23 thomas 			err = got_error_from_errno("close");
397 3efd8e31 2022-10-23 thomas 		if (err)
398 3efd8e31 2022-10-23 thomas 			return err;
399 3efd8e31 2022-10-23 thomas 	}
400 3efd8e31 2022-10-23 thomas 
401 3efd8e31 2022-10-23 thomas 	if (err == NULL) {
402 3efd8e31 2022-10-23 thomas 		(*commit)->refcnt++;
403 3efd8e31 2022-10-23 thomas 		err = got_repo_cache_commit(repo, id, *commit);
404 3efd8e31 2022-10-23 thomas 		if (err) {
405 3efd8e31 2022-10-23 thomas 			if (err->code == GOT_ERR_OBJ_EXISTS ||
406 3efd8e31 2022-10-23 thomas 			    err->code == GOT_ERR_OBJ_TOO_LARGE)
407 3efd8e31 2022-10-23 thomas 				err = NULL;
408 3efd8e31 2022-10-23 thomas 		}
409 3efd8e31 2022-10-23 thomas 	}
410 3efd8e31 2022-10-23 thomas done:
411 3efd8e31 2022-10-23 thomas 	free(path_packfile);
412 3efd8e31 2022-10-23 thomas 	return err;
413 3efd8e31 2022-10-23 thomas }
414 3efd8e31 2022-10-23 thomas 
415 3efd8e31 2022-10-23 thomas const struct got_error *
416 3efd8e31 2022-10-23 thomas got_object_open_as_commit(struct got_commit_object **commit,
417 3efd8e31 2022-10-23 thomas     struct got_repository *repo, struct got_object_id *id)
418 3efd8e31 2022-10-23 thomas {
419 3efd8e31 2022-10-23 thomas 	*commit = got_repo_get_cached_commit(repo, id);
420 3efd8e31 2022-10-23 thomas 	if (*commit != NULL) {
421 3efd8e31 2022-10-23 thomas 		(*commit)->refcnt++;
422 3efd8e31 2022-10-23 thomas 		return NULL;
423 3efd8e31 2022-10-23 thomas 	}
424 3efd8e31 2022-10-23 thomas 
425 3efd8e31 2022-10-23 thomas 	return open_commit(commit, repo, id, 0);
426 3efd8e31 2022-10-23 thomas }
427 3efd8e31 2022-10-23 thomas 
428 3efd8e31 2022-10-23 thomas const struct got_error *
429 3efd8e31 2022-10-23 thomas got_object_commit_open(struct got_commit_object **commit,
430 3efd8e31 2022-10-23 thomas     struct got_repository *repo, struct got_object *obj)
431 3efd8e31 2022-10-23 thomas {
432 3efd8e31 2022-10-23 thomas 	return open_commit(commit, repo, got_object_get_id(obj), 1);
433 3efd8e31 2022-10-23 thomas }
434 3efd8e31 2022-10-23 thomas 
435 3efd8e31 2022-10-23 thomas static const struct got_error *
436 3efd8e31 2022-10-23 thomas open_tree(struct got_tree_object **tree,
437 3efd8e31 2022-10-23 thomas     struct got_repository *repo, struct got_object_id *id, int check_cache)
438 3efd8e31 2022-10-23 thomas {
439 3efd8e31 2022-10-23 thomas 	const struct got_error *err = NULL;
440 3efd8e31 2022-10-23 thomas 	struct got_packidx *packidx = NULL;
441 3efd8e31 2022-10-23 thomas 	int idx;
442 3efd8e31 2022-10-23 thomas 	char *path_packfile = NULL;
443 3efd8e31 2022-10-23 thomas 	struct got_parsed_tree_entry *entries = NULL;
444 3efd8e31 2022-10-23 thomas 	size_t nentries = 0, nentries_alloc = 0, i;
445 3efd8e31 2022-10-23 thomas 	uint8_t *buf = NULL;
446 3efd8e31 2022-10-23 thomas 
447 3efd8e31 2022-10-23 thomas 	if (check_cache) {
448 3efd8e31 2022-10-23 thomas 		*tree = got_repo_get_cached_tree(repo, id);
449 3efd8e31 2022-10-23 thomas 		if (*tree != NULL) {
450 3efd8e31 2022-10-23 thomas 			(*tree)->refcnt++;
451 3efd8e31 2022-10-23 thomas 			return NULL;
452 3efd8e31 2022-10-23 thomas 		}
453 3efd8e31 2022-10-23 thomas 	} else
454 3efd8e31 2022-10-23 thomas 		*tree = NULL;
455 3efd8e31 2022-10-23 thomas 
456 3efd8e31 2022-10-23 thomas 	err = got_repo_search_packidx(&packidx, &idx, repo, id);
457 3efd8e31 2022-10-23 thomas 	if (err == NULL) {
458 3efd8e31 2022-10-23 thomas 		struct got_pack *pack = NULL;
459 3efd8e31 2022-10-23 thomas 		struct got_object *obj;
460 3efd8e31 2022-10-23 thomas 		size_t len;
461 3efd8e31 2022-10-23 thomas 
462 3efd8e31 2022-10-23 thomas 		err = got_packidx_get_packfile_path(&path_packfile,
463 3efd8e31 2022-10-23 thomas 		    packidx->path_packidx);
464 3efd8e31 2022-10-23 thomas 		if (err)
465 3efd8e31 2022-10-23 thomas 			return err;
466 3efd8e31 2022-10-23 thomas 
467 3efd8e31 2022-10-23 thomas 		pack = got_repo_get_cached_pack(repo, path_packfile);
468 3efd8e31 2022-10-23 thomas 		if (pack == NULL) {
469 3efd8e31 2022-10-23 thomas 			err = got_repo_cache_pack(&pack, repo, path_packfile,
470 3efd8e31 2022-10-23 thomas 			    packidx);
471 3efd8e31 2022-10-23 thomas 			if (err)
472 3efd8e31 2022-10-23 thomas 				goto done;
473 3efd8e31 2022-10-23 thomas 		}
474 3efd8e31 2022-10-23 thomas 		err = got_packfile_open_object(&obj, pack, packidx, idx, id);
475 3efd8e31 2022-10-23 thomas 		if (err)
476 3efd8e31 2022-10-23 thomas 			goto done;
477 3efd8e31 2022-10-23 thomas 		err = got_packfile_extract_object_to_mem(&buf, &len,
478 3efd8e31 2022-10-23 thomas 		    obj, pack);
479 3efd8e31 2022-10-23 thomas 		got_object_close(obj);
480 3efd8e31 2022-10-23 thomas 		if (err)
481 3efd8e31 2022-10-23 thomas 			goto done;
482 3efd8e31 2022-10-23 thomas 		err = got_object_parse_tree(&entries, &nentries,
483 3efd8e31 2022-10-23 thomas 		    &nentries_alloc, buf, len);
484 3efd8e31 2022-10-23 thomas 		if (err)
485 3efd8e31 2022-10-23 thomas 			goto done;
486 3efd8e31 2022-10-23 thomas 	} else if (err->code == GOT_ERR_NO_OBJ) {
487 3efd8e31 2022-10-23 thomas 		int fd;
488 3efd8e31 2022-10-23 thomas 
489 3efd8e31 2022-10-23 thomas 		err = got_object_open_loose_fd(&fd, id, repo);
490 3efd8e31 2022-10-23 thomas 		if (err)
491 3efd8e31 2022-10-23 thomas 			return err;
492 3efd8e31 2022-10-23 thomas 		err = got_object_read_tree(&entries, &nentries,
493 3efd8e31 2022-10-23 thomas 		    &nentries_alloc, &buf, fd, id);
494 3efd8e31 2022-10-23 thomas 		if (close(fd) == -1 && err == NULL)
495 3efd8e31 2022-10-23 thomas 			err = got_error_from_errno("close");
496 3efd8e31 2022-10-23 thomas 		if (err)
497 3efd8e31 2022-10-23 thomas 			goto done;
498 3efd8e31 2022-10-23 thomas 	} else
499 3efd8e31 2022-10-23 thomas 		goto done;
500 3efd8e31 2022-10-23 thomas 
501 3efd8e31 2022-10-23 thomas 	*tree = malloc(sizeof(**tree));
502 3efd8e31 2022-10-23 thomas 	if (*tree == NULL) {
503 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("malloc");
504 3efd8e31 2022-10-23 thomas 		goto done;
505 3efd8e31 2022-10-23 thomas 	}
506 3efd8e31 2022-10-23 thomas 	(*tree)->entries = calloc(nentries, sizeof(struct got_tree_entry));
507 3efd8e31 2022-10-23 thomas 	if ((*tree)->entries == NULL) {
508 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("malloc");
509 3efd8e31 2022-10-23 thomas 		goto done;
510 3efd8e31 2022-10-23 thomas 	}
511 3efd8e31 2022-10-23 thomas 	(*tree)->nentries = nentries;
512 3efd8e31 2022-10-23 thomas 	(*tree)->refcnt = 0;
513 3efd8e31 2022-10-23 thomas 
514 3efd8e31 2022-10-23 thomas 	for (i = 0; i < nentries; i++) {
515 3efd8e31 2022-10-23 thomas 		struct got_parsed_tree_entry *pe = &entries[i];
516 3efd8e31 2022-10-23 thomas 		struct got_tree_entry *te = &(*tree)->entries[i];
517 3efd8e31 2022-10-23 thomas 	
518 3efd8e31 2022-10-23 thomas 		if (strlcpy(te->name, pe->name,
519 3efd8e31 2022-10-23 thomas 		    sizeof(te->name)) >= sizeof(te->name)) {
520 3efd8e31 2022-10-23 thomas 			err = got_error(GOT_ERR_NO_SPACE);
521 3efd8e31 2022-10-23 thomas 			goto done;
522 3efd8e31 2022-10-23 thomas 		}
523 3efd8e31 2022-10-23 thomas 		memcpy(te->id.sha1, pe->id, SHA1_DIGEST_LENGTH);
524 3efd8e31 2022-10-23 thomas 		te->mode = pe->mode;
525 3efd8e31 2022-10-23 thomas 		te->idx = i;
526 3efd8e31 2022-10-23 thomas 	}
527 3efd8e31 2022-10-23 thomas done:
528 3efd8e31 2022-10-23 thomas 	free(path_packfile);
529 3efd8e31 2022-10-23 thomas 	free(entries);
530 3efd8e31 2022-10-23 thomas 	free(buf);
531 3efd8e31 2022-10-23 thomas 	if (err == NULL) {
532 3efd8e31 2022-10-23 thomas 		(*tree)->refcnt++;
533 3efd8e31 2022-10-23 thomas 		err = got_repo_cache_tree(repo, id, *tree);
534 3efd8e31 2022-10-23 thomas 		if (err) {
535 3efd8e31 2022-10-23 thomas 			if (err->code == GOT_ERR_OBJ_EXISTS ||
536 3efd8e31 2022-10-23 thomas 			    err->code == GOT_ERR_OBJ_TOO_LARGE)
537 3efd8e31 2022-10-23 thomas 				err = NULL;
538 3efd8e31 2022-10-23 thomas 		}
539 3efd8e31 2022-10-23 thomas 	}
540 3efd8e31 2022-10-23 thomas 	if (err) {
541 3efd8e31 2022-10-23 thomas 		if (*tree)
542 3efd8e31 2022-10-23 thomas 			free((*tree)->entries);
543 3efd8e31 2022-10-23 thomas 		free(*tree);
544 3efd8e31 2022-10-23 thomas 		*tree = NULL;
545 3efd8e31 2022-10-23 thomas 	}
546 3efd8e31 2022-10-23 thomas 	return err;
547 3efd8e31 2022-10-23 thomas }
548 3efd8e31 2022-10-23 thomas 
549 3efd8e31 2022-10-23 thomas const struct got_error *
550 3efd8e31 2022-10-23 thomas got_object_open_as_tree(struct got_tree_object **tree,
551 3efd8e31 2022-10-23 thomas     struct got_repository *repo, struct got_object_id *id)
552 3efd8e31 2022-10-23 thomas {
553 3efd8e31 2022-10-23 thomas 	*tree = got_repo_get_cached_tree(repo, id);
554 3efd8e31 2022-10-23 thomas 	if (*tree != NULL) {
555 3efd8e31 2022-10-23 thomas 		(*tree)->refcnt++;
556 3efd8e31 2022-10-23 thomas 		return NULL;
557 3efd8e31 2022-10-23 thomas 	}
558 3efd8e31 2022-10-23 thomas 
559 3efd8e31 2022-10-23 thomas 	return open_tree(tree, repo, id, 0);
560 3efd8e31 2022-10-23 thomas }
561 3efd8e31 2022-10-23 thomas 
562 3efd8e31 2022-10-23 thomas const struct got_error *
563 3efd8e31 2022-10-23 thomas got_object_tree_open(struct got_tree_object **tree,
564 3efd8e31 2022-10-23 thomas     struct got_repository *repo, struct got_object *obj)
565 3efd8e31 2022-10-23 thomas {
566 3efd8e31 2022-10-23 thomas 	return open_tree(tree, repo, got_object_get_id(obj), 1);
567 3efd8e31 2022-10-23 thomas }
568 3efd8e31 2022-10-23 thomas 
569 3efd8e31 2022-10-23 thomas const struct got_error *
570 3efd8e31 2022-10-23 thomas got_object_open_as_blob(struct got_blob_object **blob,
571 3efd8e31 2022-10-23 thomas     struct got_repository *repo, struct got_object_id *id, size_t blocksize,
572 3efd8e31 2022-10-23 thomas     int outfd)
573 3efd8e31 2022-10-23 thomas {
574 3efd8e31 2022-10-23 thomas 	return got_error(GOT_ERR_NOT_IMPL);
575 3efd8e31 2022-10-23 thomas }
576 3efd8e31 2022-10-23 thomas 
577 3efd8e31 2022-10-23 thomas const struct got_error *
578 3efd8e31 2022-10-23 thomas got_object_blob_open(struct got_blob_object **blob,
579 3efd8e31 2022-10-23 thomas     struct got_repository *repo, struct got_object *obj, size_t blocksize,
580 3efd8e31 2022-10-23 thomas     int outfd)
581 3efd8e31 2022-10-23 thomas {
582 3efd8e31 2022-10-23 thomas 	return got_error(GOT_ERR_NOT_IMPL);
583 3efd8e31 2022-10-23 thomas }
584 3efd8e31 2022-10-23 thomas 
585 3efd8e31 2022-10-23 thomas static const struct got_error *
586 3efd8e31 2022-10-23 thomas open_tag(struct got_tag_object **tag, struct got_repository *repo,
587 3efd8e31 2022-10-23 thomas     struct got_object_id *id, int check_cache)
588 3efd8e31 2022-10-23 thomas {
589 3efd8e31 2022-10-23 thomas 	const struct got_error *err = NULL;
590 3efd8e31 2022-10-23 thomas 	struct got_packidx *packidx = NULL;
591 3efd8e31 2022-10-23 thomas 	int idx;
592 3efd8e31 2022-10-23 thomas 	char *path_packfile = NULL;
593 3efd8e31 2022-10-23 thomas 	struct got_object *obj = NULL;
594 3efd8e31 2022-10-23 thomas 	int obj_type = GOT_OBJ_TYPE_ANY;
595 3efd8e31 2022-10-23 thomas 
596 3efd8e31 2022-10-23 thomas 	if (check_cache) {
597 3efd8e31 2022-10-23 thomas 		*tag = got_repo_get_cached_tag(repo, id);
598 3efd8e31 2022-10-23 thomas 		if (*tag != NULL) {
599 3efd8e31 2022-10-23 thomas 			(*tag)->refcnt++;
600 3efd8e31 2022-10-23 thomas 			return NULL;
601 3efd8e31 2022-10-23 thomas 		}
602 3efd8e31 2022-10-23 thomas 	} else
603 3efd8e31 2022-10-23 thomas 		*tag = NULL;
604 3efd8e31 2022-10-23 thomas 
605 3efd8e31 2022-10-23 thomas 	err = got_repo_search_packidx(&packidx, &idx, repo, id);
606 3efd8e31 2022-10-23 thomas 	if (err == NULL) {
607 3efd8e31 2022-10-23 thomas 		struct got_pack *pack = NULL;
608 3efd8e31 2022-10-23 thomas 		uint8_t *buf = NULL;
609 3efd8e31 2022-10-23 thomas 		size_t len;
610 3efd8e31 2022-10-23 thomas 
611 3efd8e31 2022-10-23 thomas 		err = got_packidx_get_packfile_path(&path_packfile,
612 3efd8e31 2022-10-23 thomas 		    packidx->path_packidx);
613 3efd8e31 2022-10-23 thomas 		if (err)
614 3efd8e31 2022-10-23 thomas 			return err;
615 3efd8e31 2022-10-23 thomas 
616 3efd8e31 2022-10-23 thomas 		pack = got_repo_get_cached_pack(repo, path_packfile);
617 3efd8e31 2022-10-23 thomas 		if (pack == NULL) {
618 3efd8e31 2022-10-23 thomas 			err = got_repo_cache_pack(&pack, repo, path_packfile,
619 3efd8e31 2022-10-23 thomas 			    packidx);
620 3efd8e31 2022-10-23 thomas 			if (err)
621 3efd8e31 2022-10-23 thomas 				goto done;
622 3efd8e31 2022-10-23 thomas 		}
623 3efd8e31 2022-10-23 thomas 
624 3efd8e31 2022-10-23 thomas 		/* Beware of "lightweight" tags: Check object type first. */
625 3efd8e31 2022-10-23 thomas 		err = got_packfile_open_object(&obj, pack, packidx, idx, id);
626 3efd8e31 2022-10-23 thomas 		if (err)
627 3efd8e31 2022-10-23 thomas 			goto done;
628 3efd8e31 2022-10-23 thomas 		obj_type = obj->type;
629 3efd8e31 2022-10-23 thomas 		if (obj_type != GOT_OBJ_TYPE_TAG) {
630 3efd8e31 2022-10-23 thomas 			err = got_error(GOT_ERR_OBJ_TYPE);
631 3efd8e31 2022-10-23 thomas 			got_object_close(obj);
632 3efd8e31 2022-10-23 thomas 			goto done;
633 3efd8e31 2022-10-23 thomas 		}
634 3efd8e31 2022-10-23 thomas 		err = got_packfile_extract_object_to_mem(&buf, &len,
635 3efd8e31 2022-10-23 thomas 		    obj, pack);
636 3efd8e31 2022-10-23 thomas 		got_object_close(obj);
637 3efd8e31 2022-10-23 thomas 		if (err)
638 3efd8e31 2022-10-23 thomas 			goto done;
639 3efd8e31 2022-10-23 thomas 		err = got_object_parse_tag(tag, buf, len);
640 3efd8e31 2022-10-23 thomas 		free(buf);
641 3efd8e31 2022-10-23 thomas 	} else if (err->code == GOT_ERR_NO_OBJ) {
642 3efd8e31 2022-10-23 thomas 		int fd;
643 3efd8e31 2022-10-23 thomas 
644 3efd8e31 2022-10-23 thomas 		err = got_object_open_loose_fd(&fd, id, repo);
645 3efd8e31 2022-10-23 thomas 		if (err)
646 3efd8e31 2022-10-23 thomas 			return err;
647 3efd8e31 2022-10-23 thomas 		err = got_object_read_header(&obj, fd);
648 3efd8e31 2022-10-23 thomas 		if (close(fd) == -1 && err == NULL)
649 3efd8e31 2022-10-23 thomas 			err = got_error_from_errno("close");
650 3efd8e31 2022-10-23 thomas 		if (err)
651 3efd8e31 2022-10-23 thomas 			return err;
652 3efd8e31 2022-10-23 thomas 		obj_type = obj->type;
653 3efd8e31 2022-10-23 thomas 		got_object_close(obj);
654 3efd8e31 2022-10-23 thomas 		if (obj_type != GOT_OBJ_TYPE_TAG)
655 3efd8e31 2022-10-23 thomas 			return got_error(GOT_ERR_OBJ_TYPE);
656 3efd8e31 2022-10-23 thomas 
657 3efd8e31 2022-10-23 thomas 		err = got_object_open_loose_fd(&fd, id, repo);
658 3efd8e31 2022-10-23 thomas 		if (err)
659 3efd8e31 2022-10-23 thomas 			return err;
660 3efd8e31 2022-10-23 thomas 		err = got_object_read_tag(tag, fd, id, 0);
661 3efd8e31 2022-10-23 thomas 		if (close(fd) == -1 && err == NULL)
662 3efd8e31 2022-10-23 thomas 			err = got_error_from_errno("close");
663 3efd8e31 2022-10-23 thomas 		if (err)
664 3efd8e31 2022-10-23 thomas 			return err;
665 3efd8e31 2022-10-23 thomas 	}
666 3efd8e31 2022-10-23 thomas 
667 3efd8e31 2022-10-23 thomas 	if (err == NULL) {
668 3efd8e31 2022-10-23 thomas 		(*tag)->refcnt++;
669 3efd8e31 2022-10-23 thomas 		err = got_repo_cache_tag(repo, id, *tag);
670 3efd8e31 2022-10-23 thomas 		if (err) {
671 3efd8e31 2022-10-23 thomas 			if (err->code == GOT_ERR_OBJ_EXISTS ||
672 3efd8e31 2022-10-23 thomas 			    err->code == GOT_ERR_OBJ_TOO_LARGE)
673 3efd8e31 2022-10-23 thomas 				err = NULL;
674 3efd8e31 2022-10-23 thomas 		}
675 3efd8e31 2022-10-23 thomas 	}
676 3efd8e31 2022-10-23 thomas done:
677 3efd8e31 2022-10-23 thomas 	free(path_packfile);
678 3efd8e31 2022-10-23 thomas 	return err;
679 3efd8e31 2022-10-23 thomas }
680 3efd8e31 2022-10-23 thomas 
681 3efd8e31 2022-10-23 thomas const struct got_error *
682 3efd8e31 2022-10-23 thomas got_object_open_as_tag(struct got_tag_object **tag,
683 3efd8e31 2022-10-23 thomas     struct got_repository *repo, struct got_object_id *id)
684 3efd8e31 2022-10-23 thomas {
685 3efd8e31 2022-10-23 thomas 	*tag = got_repo_get_cached_tag(repo, id);
686 3efd8e31 2022-10-23 thomas 	if (*tag != NULL) {
687 3efd8e31 2022-10-23 thomas 		(*tag)->refcnt++;
688 3efd8e31 2022-10-23 thomas 		return NULL;
689 3efd8e31 2022-10-23 thomas 	}
690 3efd8e31 2022-10-23 thomas 
691 3efd8e31 2022-10-23 thomas 	return open_tag(tag, repo, id, 0);
692 3efd8e31 2022-10-23 thomas }
693 3efd8e31 2022-10-23 thomas 
694 3efd8e31 2022-10-23 thomas const struct got_error *
695 3efd8e31 2022-10-23 thomas got_object_tag_open(struct got_tag_object **tag,
696 3efd8e31 2022-10-23 thomas     struct got_repository *repo, struct got_object *obj)
697 3efd8e31 2022-10-23 thomas {
698 3efd8e31 2022-10-23 thomas 	return open_tag(tag, repo, got_object_get_id(obj), 1);
699 3efd8e31 2022-10-23 thomas }