1 0136599f 2022-10-20 stsp /*
  2 0136599f 2022-10-20 stsp  * Copyright (c) 2019 Ori Bernstein <ori@openbsd.org>
  3 0136599f 2022-10-20 stsp  * Copyright (c) 2020, 2022 Stefan Sperling <stsp@openbsd.org>
  4 0136599f 2022-10-20 stsp  *
  5 0136599f 2022-10-20 stsp  * Permission to use, copy, modify, and distribute this software for any
  6 0136599f 2022-10-20 stsp  * purpose with or without fee is hereby granted, provided that the above
  7 0136599f 2022-10-20 stsp  * copyright notice and this permission notice appear in all copies.
  8 0136599f 2022-10-20 stsp  *
  9 0136599f 2022-10-20 stsp  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 10 0136599f 2022-10-20 stsp  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 11 0136599f 2022-10-20 stsp  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 12 0136599f 2022-10-20 stsp  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 13 0136599f 2022-10-20 stsp  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 14 0136599f 2022-10-20 stsp  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 15 0136599f 2022-10-20 stsp  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 16 0136599f 2022-10-20 stsp  */
 17 0136599f 2022-10-20 stsp 
 18 0136599f 2022-10-20 stsp #include <sys/queue.h>
 19 0136599f 2022-10-20 stsp #include <sys/stat.h>
 20 0136599f 2022-10-20 stsp #include <sys/time.h>
 21 0136599f 2022-10-20 stsp #include <sys/types.h>
 22 0136599f 2022-10-20 stsp #include <sys/uio.h>
 23 0136599f 2022-10-20 stsp #include <sys/mman.h>
 24 0136599f 2022-10-20 stsp 
 25 0136599f 2022-10-20 stsp #include <stdint.h>
 26 0136599f 2022-10-20 stsp #include <errno.h>
 27 0136599f 2022-10-20 stsp #include <imsg.h>
 28 0136599f 2022-10-20 stsp #include <limits.h>
 29 0136599f 2022-10-20 stsp #include <signal.h>
 30 0136599f 2022-10-20 stsp #include <stdio.h>
 31 0136599f 2022-10-20 stsp #include <stdlib.h>
 32 0136599f 2022-10-20 stsp #include <string.h>
 33 0136599f 2022-10-20 stsp #include <ctype.h>
 34 0136599f 2022-10-20 stsp #include <sha1.h>
 35 0136599f 2022-10-20 stsp #include <endian.h>
 36 0136599f 2022-10-20 stsp #include <fcntl.h>
 37 0136599f 2022-10-20 stsp #include <unistd.h>
 38 0136599f 2022-10-20 stsp #include <zlib.h>
 39 0136599f 2022-10-20 stsp #include <err.h>
 40 0136599f 2022-10-20 stsp #include <assert.h>
 41 0136599f 2022-10-20 stsp #include <dirent.h>
 42 0136599f 2022-10-20 stsp 
 43 0136599f 2022-10-20 stsp #include "got_error.h"
 44 0136599f 2022-10-20 stsp #include "got_object.h"
 45 0136599f 2022-10-20 stsp 
 46 0136599f 2022-10-20 stsp #include "got_lib_sha1.h"
 47 0136599f 2022-10-20 stsp #include "got_lib_delta.h"
 48 0136599f 2022-10-20 stsp #include "got_lib_inflate.h"
 49 0136599f 2022-10-20 stsp #include "got_lib_object.h"
 50 0136599f 2022-10-20 stsp #include "got_lib_object_parse.h"
 51 0136599f 2022-10-20 stsp #include "got_lib_object_idset.h"
 52 0136599f 2022-10-20 stsp #include "got_lib_privsep.h"
 53 0136599f 2022-10-20 stsp #include "got_lib_pack.h"
 54 0136599f 2022-10-20 stsp #include "got_lib_ratelimit.h"
 55 0136599f 2022-10-20 stsp #include "got_lib_pack_index.h"
 56 0136599f 2022-10-20 stsp #include "got_lib_delta_cache.h"
 57 0136599f 2022-10-20 stsp 
 58 0136599f 2022-10-20 stsp struct got_indexed_object {
 59 0136599f 2022-10-20 stsp 	struct got_object_id id;
 60 0136599f 2022-10-20 stsp 
 61 0136599f 2022-10-20 stsp 	/*
 62 0136599f 2022-10-20 stsp 	 * Has this object been fully resolved?
 63 0136599f 2022-10-20 stsp 	 * If so, we know its ID, otherwise we don't and 'id' is invalid.
 64 0136599f 2022-10-20 stsp 	 */
 65 0136599f 2022-10-20 stsp 	int valid;
 66 0136599f 2022-10-20 stsp 
 67 0136599f 2022-10-20 stsp 	/* Offset of type+size field for this object in pack file. */
 68 0136599f 2022-10-20 stsp 	off_t off;
 69 0136599f 2022-10-20 stsp 
 70 0136599f 2022-10-20 stsp 	/* Type+size values parsed from pack file. */
 71 0136599f 2022-10-20 stsp 	uint8_t type;
 72 0136599f 2022-10-20 stsp 	uint64_t size;
 73 0136599f 2022-10-20 stsp 
 74 0136599f 2022-10-20 stsp 	/* Length of on-disk type+size data. */
 75 0136599f 2022-10-20 stsp 	size_t tslen;
 76 0136599f 2022-10-20 stsp 
 77 0136599f 2022-10-20 stsp 	/* Length of object data following type+size. */
 78 0136599f 2022-10-20 stsp 	size_t len;
 79 0136599f 2022-10-20 stsp 
 80 0136599f 2022-10-20 stsp 	uint32_t crc;
 81 0136599f 2022-10-20 stsp 
 82 0136599f 2022-10-20 stsp 	union {
 83 0136599f 2022-10-20 stsp 		struct {
 84 0136599f 2022-10-20 stsp 			/* For ref deltas. */
 85 0136599f 2022-10-20 stsp 			struct got_object_id ref_id;
 86 0136599f 2022-10-20 stsp 		} ref;
 87 0136599f 2022-10-20 stsp 		struct {
 88 0136599f 2022-10-20 stsp 			/* For offset deltas. */
 89 0136599f 2022-10-20 stsp 			off_t base_offset;
 90 0136599f 2022-10-20 stsp 			size_t base_offsetlen;
 91 0136599f 2022-10-20 stsp 		} ofs;
 92 0136599f 2022-10-20 stsp 	} delta;
 93 0136599f 2022-10-20 stsp };
 94 0136599f 2022-10-20 stsp 
 95 0136599f 2022-10-20 stsp static void
 96 0136599f 2022-10-20 stsp putbe32(char *b, uint32_t n)
 97 0136599f 2022-10-20 stsp {
 98 0136599f 2022-10-20 stsp 	b[0] = n >> 24;
 99 0136599f 2022-10-20 stsp 	b[1] = n >> 16;
100 0136599f 2022-10-20 stsp 	b[2] = n >> 8;
101 0136599f 2022-10-20 stsp 	b[3] = n >> 0;
102 0136599f 2022-10-20 stsp }
103 0136599f 2022-10-20 stsp 
104 0136599f 2022-10-20 stsp static const struct got_error *
105 0136599f 2022-10-20 stsp get_obj_type_label(const char **label, int obj_type)
106 0136599f 2022-10-20 stsp {
107 0136599f 2022-10-20 stsp 	const struct got_error *err = NULL;
108 0136599f 2022-10-20 stsp 
109 0136599f 2022-10-20 stsp 	switch (obj_type) {
110 0136599f 2022-10-20 stsp 	case GOT_OBJ_TYPE_BLOB:
111 0136599f 2022-10-20 stsp 		*label = GOT_OBJ_LABEL_BLOB;
112 0136599f 2022-10-20 stsp 		break;
113 0136599f 2022-10-20 stsp 	case GOT_OBJ_TYPE_TREE:
114 0136599f 2022-10-20 stsp 		*label = GOT_OBJ_LABEL_TREE;
115 0136599f 2022-10-20 stsp 		break;
116 0136599f 2022-10-20 stsp 	case GOT_OBJ_TYPE_COMMIT:
117 0136599f 2022-10-20 stsp 		*label = GOT_OBJ_LABEL_COMMIT;
118 0136599f 2022-10-20 stsp 		break;
119 0136599f 2022-10-20 stsp 	case GOT_OBJ_TYPE_TAG:
120 0136599f 2022-10-20 stsp 		*label = GOT_OBJ_LABEL_TAG;
121 0136599f 2022-10-20 stsp 		break;
122 0136599f 2022-10-20 stsp 	default:
123 0136599f 2022-10-20 stsp 		*label = NULL;
124 0136599f 2022-10-20 stsp 		err = got_error(GOT_ERR_OBJ_TYPE);
125 0136599f 2022-10-20 stsp 		break;
126 0136599f 2022-10-20 stsp 	}
127 0136599f 2022-10-20 stsp 
128 0136599f 2022-10-20 stsp 	return err;
129 0136599f 2022-10-20 stsp }
130 0136599f 2022-10-20 stsp 
131 0136599f 2022-10-20 stsp static const struct got_error *
132 0136599f 2022-10-20 stsp read_checksum(uint32_t *crc, SHA1_CTX *sha1_ctx, int fd, size_t len)
133 0136599f 2022-10-20 stsp {
134 0136599f 2022-10-20 stsp 	uint8_t buf[8192];
135 0136599f 2022-10-20 stsp 	size_t n;
136 0136599f 2022-10-20 stsp 	ssize_t r;
137 0136599f 2022-10-20 stsp 
138 0136599f 2022-10-20 stsp 	for (n = len; n > 0; n -= r){
139 0136599f 2022-10-20 stsp 		r = read(fd, buf, n > sizeof(buf) ? sizeof(buf) : n);
140 0136599f 2022-10-20 stsp 		if (r == -1)
141 0136599f 2022-10-20 stsp 			return got_error_from_errno("read");
142 0136599f 2022-10-20 stsp 		if (r == 0)
143 0136599f 2022-10-20 stsp 			break;
144 0136599f 2022-10-20 stsp 		if (crc)
145 0136599f 2022-10-20 stsp 			*crc = crc32(*crc, buf, r);
146 0136599f 2022-10-20 stsp 		if (sha1_ctx)
147 0136599f 2022-10-20 stsp 			SHA1Update(sha1_ctx, buf, r);
148 0136599f 2022-10-20 stsp 	}
149 0136599f 2022-10-20 stsp 
150 0136599f 2022-10-20 stsp 	return NULL;
151 0136599f 2022-10-20 stsp }
152 0136599f 2022-10-20 stsp 
153 0136599f 2022-10-20 stsp static const struct got_error *
154 0136599f 2022-10-20 stsp read_file_sha1(SHA1_CTX *ctx, FILE *f, size_t len)
155 0136599f 2022-10-20 stsp {
156 0136599f 2022-10-20 stsp 	uint8_t buf[8192];
157 0136599f 2022-10-20 stsp 	size_t n, r;
158 0136599f 2022-10-20 stsp 
159 0136599f 2022-10-20 stsp 	for (n = len; n > 0; n -= r) {
160 0136599f 2022-10-20 stsp 		r = fread(buf, 1, n > sizeof(buf) ? sizeof(buf) : n, f);
161 0136599f 2022-10-20 stsp 		if (r == 0) {
162 0136599f 2022-10-20 stsp 			if (feof(f))
163 0136599f 2022-10-20 stsp 				return NULL;
164 0136599f 2022-10-20 stsp 			return got_ferror(f, GOT_ERR_IO);
165 0136599f 2022-10-20 stsp 		}
166 0136599f 2022-10-20 stsp 		SHA1Update(ctx, buf, r);
167 0136599f 2022-10-20 stsp 	}
168 0136599f 2022-10-20 stsp 
169 0136599f 2022-10-20 stsp 	return NULL;
170 0136599f 2022-10-20 stsp }
171 0136599f 2022-10-20 stsp 
172 0136599f 2022-10-20 stsp static const struct got_error *
173 0136599f 2022-10-20 stsp read_packed_object(struct got_pack *pack, struct got_indexed_object *obj,
174 0136599f 2022-10-20 stsp     FILE *tmpfile, SHA1_CTX *pack_sha1_ctx)
175 0136599f 2022-10-20 stsp {
176 0136599f 2022-10-20 stsp 	const struct got_error *err = NULL;
177 0136599f 2022-10-20 stsp 	SHA1_CTX ctx;
178 0136599f 2022-10-20 stsp 	uint8_t *data = NULL;
179 0136599f 2022-10-20 stsp 	size_t datalen = 0;
180 0136599f 2022-10-20 stsp 	ssize_t n;
181 0136599f 2022-10-20 stsp 	char *header;
182 0136599f 2022-10-20 stsp 	size_t headerlen;
183 0136599f 2022-10-20 stsp 	const char *obj_label;
184 0136599f 2022-10-20 stsp 	size_t mapoff = obj->off;
185 0136599f 2022-10-20 stsp 	struct got_inflate_checksum csum;
186 0136599f 2022-10-20 stsp 
187 0136599f 2022-10-20 stsp 	memset(&csum, 0, sizeof(csum));
188 0136599f 2022-10-20 stsp 	csum.input_sha1 = pack_sha1_ctx;
189 0136599f 2022-10-20 stsp 	csum.input_crc = &obj->crc;
190 0136599f 2022-10-20 stsp 
191 0136599f 2022-10-20 stsp 	err = got_pack_parse_object_type_and_size(&obj->type, &obj->size,
192 0136599f 2022-10-20 stsp 	    &obj->tslen, pack, obj->off);
193 0136599f 2022-10-20 stsp 	if (err)
194 0136599f 2022-10-20 stsp 		return err;
195 0136599f 2022-10-20 stsp 
196 0136599f 2022-10-20 stsp 	if (pack->map) {
197 0136599f 2022-10-20 stsp 		obj->crc = crc32(obj->crc, pack->map + mapoff, obj->tslen);
198 0136599f 2022-10-20 stsp 		SHA1Update(pack_sha1_ctx, pack->map + mapoff, obj->tslen);
199 0136599f 2022-10-20 stsp 		mapoff += obj->tslen;
200 0136599f 2022-10-20 stsp 	} else {
201 0136599f 2022-10-20 stsp 		/* XXX Seek back and get the CRC of on-disk type+size bytes. */
202 0136599f 2022-10-20 stsp 		if (lseek(pack->fd, obj->off, SEEK_SET) == -1)
203 0136599f 2022-10-20 stsp 			return got_error_from_errno("lseek");
204 0136599f 2022-10-20 stsp 		err = read_checksum(&obj->crc, pack_sha1_ctx,
205 0136599f 2022-10-20 stsp 		    pack->fd, obj->tslen);
206 0136599f 2022-10-20 stsp 		if (err)
207 0136599f 2022-10-20 stsp 			return err;
208 0136599f 2022-10-20 stsp 	}
209 0136599f 2022-10-20 stsp 
210 0136599f 2022-10-20 stsp 	switch (obj->type) {
211 0136599f 2022-10-20 stsp 	case GOT_OBJ_TYPE_BLOB:
212 0136599f 2022-10-20 stsp 	case GOT_OBJ_TYPE_COMMIT:
213 0136599f 2022-10-20 stsp 	case GOT_OBJ_TYPE_TREE:
214 0136599f 2022-10-20 stsp 	case GOT_OBJ_TYPE_TAG:
215 0136599f 2022-10-20 stsp 		if (obj->size > GOT_DELTA_RESULT_SIZE_CACHED_MAX) {
216 0136599f 2022-10-20 stsp 			if (fseek(tmpfile, 0L, SEEK_SET) == -1) {
217 0136599f 2022-10-20 stsp 				err = got_error_from_errno("fseek");
218 0136599f 2022-10-20 stsp 				break;
219 0136599f 2022-10-20 stsp 			}
220 0136599f 2022-10-20 stsp 			if (pack->map) {
221 0136599f 2022-10-20 stsp 				err = got_inflate_to_file_mmap(&datalen,
222 0136599f 2022-10-20 stsp 				    &obj->len, &csum, pack->map, mapoff,
223 0136599f 2022-10-20 stsp 				    pack->filesize - mapoff, tmpfile);
224 0136599f 2022-10-20 stsp 			} else {
225 0136599f 2022-10-20 stsp 				err = got_inflate_to_file_fd(&datalen,
226 0136599f 2022-10-20 stsp 				    &obj->len, &csum, pack->fd, tmpfile);
227 0136599f 2022-10-20 stsp 			}
228 0136599f 2022-10-20 stsp 		} else {
229 0136599f 2022-10-20 stsp 			if (pack->map) {
230 0136599f 2022-10-20 stsp 				err = got_inflate_to_mem_mmap(&data, &datalen,
231 0136599f 2022-10-20 stsp 				    &obj->len, &csum, pack->map, mapoff,
232 0136599f 2022-10-20 stsp 				    pack->filesize - mapoff);
233 0136599f 2022-10-20 stsp 			} else {
234 0136599f 2022-10-20 stsp 				err = got_inflate_to_mem_fd(&data, &datalen,
235 0136599f 2022-10-20 stsp 				    &obj->len, &csum, obj->size, pack->fd);
236 0136599f 2022-10-20 stsp 			}
237 0136599f 2022-10-20 stsp 		}
238 0136599f 2022-10-20 stsp 		if (err)
239 0136599f 2022-10-20 stsp 			break;
240 0136599f 2022-10-20 stsp 		SHA1Init(&ctx);
241 0136599f 2022-10-20 stsp 		err = get_obj_type_label(&obj_label, obj->type);
242 0136599f 2022-10-20 stsp 		if (err) {
243 0136599f 2022-10-20 stsp 			free(data);
244 0136599f 2022-10-20 stsp 			break;
245 0136599f 2022-10-20 stsp 		}
246 0136599f 2022-10-20 stsp 		if (asprintf(&header, "%s %lld", obj_label,
247 0136599f 2022-10-20 stsp 		    (long long)obj->size) == -1) {
248 0136599f 2022-10-20 stsp 			err = got_error_from_errno("asprintf");
249 0136599f 2022-10-20 stsp 			free(data);
250 0136599f 2022-10-20 stsp 			break;
251 0136599f 2022-10-20 stsp 		}
252 0136599f 2022-10-20 stsp 		headerlen = strlen(header) + 1;
253 0136599f 2022-10-20 stsp 		SHA1Update(&ctx, header, headerlen);
254 0136599f 2022-10-20 stsp 		if (obj->size > GOT_DELTA_RESULT_SIZE_CACHED_MAX) {
255 0136599f 2022-10-20 stsp 			err = read_file_sha1(&ctx, tmpfile, datalen);
256 0136599f 2022-10-20 stsp 			if (err) {
257 0136599f 2022-10-20 stsp 				free(header);
258 0136599f 2022-10-20 stsp 				free(data);
259 0136599f 2022-10-20 stsp 				break;
260 0136599f 2022-10-20 stsp 			}
261 0136599f 2022-10-20 stsp 		} else
262 0136599f 2022-10-20 stsp 			SHA1Update(&ctx, data, datalen);
263 0136599f 2022-10-20 stsp 		SHA1Final(obj->id.sha1, &ctx);
264 0136599f 2022-10-20 stsp 		free(header);
265 0136599f 2022-10-20 stsp 		free(data);
266 0136599f 2022-10-20 stsp 		break;
267 0136599f 2022-10-20 stsp 	case GOT_OBJ_TYPE_REF_DELTA:
268 0136599f 2022-10-20 stsp 		memset(obj->id.sha1, 0xff, SHA1_DIGEST_LENGTH);
269 0136599f 2022-10-20 stsp 		if (pack->map) {
270 0136599f 2022-10-20 stsp 			if (mapoff + SHA1_DIGEST_LENGTH >= pack->filesize) {
271 0136599f 2022-10-20 stsp 				err = got_error(GOT_ERR_BAD_PACKFILE);
272 0136599f 2022-10-20 stsp 				break;
273 0136599f 2022-10-20 stsp 			}
274 0136599f 2022-10-20 stsp 			memcpy(obj->delta.ref.ref_id.sha1, pack->map + mapoff,
275 0136599f 2022-10-20 stsp 			    SHA1_DIGEST_LENGTH);
276 0136599f 2022-10-20 stsp 			obj->crc = crc32(obj->crc, pack->map + mapoff,
277 0136599f 2022-10-20 stsp 			    SHA1_DIGEST_LENGTH);
278 0136599f 2022-10-20 stsp 			SHA1Update(pack_sha1_ctx, pack->map + mapoff,
279 0136599f 2022-10-20 stsp 			    SHA1_DIGEST_LENGTH);
280 0136599f 2022-10-20 stsp 			mapoff += SHA1_DIGEST_LENGTH;
281 0136599f 2022-10-20 stsp 			err = got_inflate_to_mem_mmap(NULL, &datalen,
282 0136599f 2022-10-20 stsp 			    &obj->len, &csum, pack->map, mapoff,
283 0136599f 2022-10-20 stsp 			    pack->filesize - mapoff);
284 0136599f 2022-10-20 stsp 			if (err)
285 0136599f 2022-10-20 stsp 				break;
286 0136599f 2022-10-20 stsp 		} else {
287 0136599f 2022-10-20 stsp 			n = read(pack->fd, obj->delta.ref.ref_id.sha1,
288 0136599f 2022-10-20 stsp 			    SHA1_DIGEST_LENGTH);
289 0136599f 2022-10-20 stsp 			if (n == -1) {
290 0136599f 2022-10-20 stsp 				err = got_error_from_errno("read");
291 0136599f 2022-10-20 stsp 				break;
292 0136599f 2022-10-20 stsp 			}
293 0136599f 2022-10-20 stsp 			if (n < sizeof(obj->id)) {
294 0136599f 2022-10-20 stsp 				err = got_error(GOT_ERR_BAD_PACKFILE);
295 0136599f 2022-10-20 stsp 				break;
296 0136599f 2022-10-20 stsp 			}
297 0136599f 2022-10-20 stsp 			obj->crc = crc32(obj->crc, obj->delta.ref.ref_id.sha1,
298 0136599f 2022-10-20 stsp 			    SHA1_DIGEST_LENGTH);
299 0136599f 2022-10-20 stsp 			SHA1Update(pack_sha1_ctx, obj->delta.ref.ref_id.sha1,
300 0136599f 2022-10-20 stsp 			    SHA1_DIGEST_LENGTH);
301 0136599f 2022-10-20 stsp 			err = got_inflate_to_mem_fd(NULL, &datalen, &obj->len,
302 0136599f 2022-10-20 stsp 			    &csum, obj->size, pack->fd);
303 0136599f 2022-10-20 stsp 			if (err)
304 0136599f 2022-10-20 stsp 				break;
305 0136599f 2022-10-20 stsp 		}
306 0136599f 2022-10-20 stsp 		obj->len += SHA1_DIGEST_LENGTH;
307 0136599f 2022-10-20 stsp 		break;
308 0136599f 2022-10-20 stsp 	case GOT_OBJ_TYPE_OFFSET_DELTA:
309 0136599f 2022-10-20 stsp 		memset(obj->id.sha1, 0xff, SHA1_DIGEST_LENGTH);
310 0136599f 2022-10-20 stsp 		err = got_pack_parse_offset_delta(&obj->delta.ofs.base_offset,
311 0136599f 2022-10-20 stsp 		    &obj->delta.ofs.base_offsetlen, pack, obj->off,
312 0136599f 2022-10-20 stsp 		    obj->tslen);
313 0136599f 2022-10-20 stsp 		if (err)
314 0136599f 2022-10-20 stsp 			break;
315 0136599f 2022-10-20 stsp 
316 0136599f 2022-10-20 stsp 		if (pack->map) {
317 5326bd73 2022-10-24 op 			if (mapoff + obj->delta.ofs.base_offsetlen >=
318 5326bd73 2022-10-24 op 			    pack->filesize) {
319 5326bd73 2022-10-24 op 				err = got_error(GOT_ERR_BAD_PACKFILE);
320 5326bd73 2022-10-24 op 				break;
321 5326bd73 2022-10-24 op 			}
322 5326bd73 2022-10-24 op 
323 0136599f 2022-10-20 stsp 			obj->crc = crc32(obj->crc, pack->map + mapoff,
324 0136599f 2022-10-20 stsp 			    obj->delta.ofs.base_offsetlen);
325 0136599f 2022-10-20 stsp 			SHA1Update(pack_sha1_ctx, pack->map + mapoff,
326 0136599f 2022-10-20 stsp 			    obj->delta.ofs.base_offsetlen);
327 0136599f 2022-10-20 stsp 			mapoff += obj->delta.ofs.base_offsetlen;
328 0136599f 2022-10-20 stsp 			err = got_inflate_to_mem_mmap(NULL, &datalen,
329 0136599f 2022-10-20 stsp 			    &obj->len, &csum, pack->map, mapoff,
330 0136599f 2022-10-20 stsp 			    pack->filesize - mapoff);
331 0136599f 2022-10-20 stsp 			if (err)
332 0136599f 2022-10-20 stsp 				break;
333 0136599f 2022-10-20 stsp 		} else {
334 0136599f 2022-10-20 stsp 			/*
335 0136599f 2022-10-20 stsp 			 * XXX Seek back and get CRC and SHA1 of on-disk
336 0136599f 2022-10-20 stsp 			 * offset bytes.
337 0136599f 2022-10-20 stsp 			 */
338 0136599f 2022-10-20 stsp 			if (lseek(pack->fd, obj->off + obj->tslen, SEEK_SET)
339 0136599f 2022-10-20 stsp 			    == -1) {
340 0136599f 2022-10-20 stsp 				err = got_error_from_errno("lseek");
341 0136599f 2022-10-20 stsp 				break;
342 0136599f 2022-10-20 stsp 			}
343 0136599f 2022-10-20 stsp 			err = read_checksum(&obj->crc, pack_sha1_ctx,
344 0136599f 2022-10-20 stsp 			    pack->fd, obj->delta.ofs.base_offsetlen);
345 0136599f 2022-10-20 stsp 			if (err)
346 0136599f 2022-10-20 stsp 				break;
347 0136599f 2022-10-20 stsp 
348 0136599f 2022-10-20 stsp 			err = got_inflate_to_mem_fd(NULL, &datalen, &obj->len,
349 0136599f 2022-10-20 stsp 			    &csum, obj->size, pack->fd);
350 0136599f 2022-10-20 stsp 			if (err)
351 0136599f 2022-10-20 stsp 				break;
352 0136599f 2022-10-20 stsp 		}
353 0136599f 2022-10-20 stsp 		obj->len += obj->delta.ofs.base_offsetlen;
354 0136599f 2022-10-20 stsp 		break;
355 0136599f 2022-10-20 stsp 	default:
356 0136599f 2022-10-20 stsp 		err = got_error(GOT_ERR_OBJ_TYPE);
357 0136599f 2022-10-20 stsp 		break;
358 0136599f 2022-10-20 stsp 	}
359 0136599f 2022-10-20 stsp 
360 0136599f 2022-10-20 stsp 	return err;
361 0136599f 2022-10-20 stsp }
362 0136599f 2022-10-20 stsp 
363 13b2bc37 2022-10-23 stsp const struct got_error *
364 13b2bc37 2022-10-23 stsp got_pack_hwrite(int fd, void *buf, int len, SHA1_CTX *ctx)
365 0136599f 2022-10-20 stsp {
366 0136599f 2022-10-20 stsp 	ssize_t w;
367 0136599f 2022-10-20 stsp 
368 0136599f 2022-10-20 stsp 	SHA1Update(ctx, buf, len);
369 0136599f 2022-10-20 stsp 
370 0136599f 2022-10-20 stsp 	w = write(fd, buf, len);
371 0136599f 2022-10-20 stsp 	if (w == -1)
372 0136599f 2022-10-20 stsp 		return got_error_from_errno("write");
373 0136599f 2022-10-20 stsp 	if (w != len)
374 0136599f 2022-10-20 stsp 		return got_error(GOT_ERR_IO);
375 0136599f 2022-10-20 stsp 
376 0136599f 2022-10-20 stsp 	return NULL;
377 0136599f 2022-10-20 stsp }
378 0136599f 2022-10-20 stsp 
379 0136599f 2022-10-20 stsp static const struct got_error *
380 0136599f 2022-10-20 stsp resolve_deltified_object(struct got_pack *pack, struct got_packidx *packidx,
381 0136599f 2022-10-20 stsp     struct got_indexed_object *obj, FILE *tmpfile, FILE *delta_base_file,
382 0136599f 2022-10-20 stsp     FILE *delta_accum_file)
383 0136599f 2022-10-20 stsp {
384 0136599f 2022-10-20 stsp 	const struct got_error *err = NULL;
385 0136599f 2022-10-20 stsp 	struct got_delta_chain deltas;
386 0136599f 2022-10-20 stsp 	struct got_delta *delta;
387 0136599f 2022-10-20 stsp 	uint8_t *buf = NULL;
388 0136599f 2022-10-20 stsp 	size_t len = 0;
389 0136599f 2022-10-20 stsp 	SHA1_CTX ctx;
390 0136599f 2022-10-20 stsp 	char *header = NULL;
391 0136599f 2022-10-20 stsp 	size_t headerlen;
392 0136599f 2022-10-20 stsp 	uint64_t max_size;
393 0136599f 2022-10-20 stsp 	int base_obj_type;
394 0136599f 2022-10-20 stsp 	const char *obj_label;
395 0136599f 2022-10-20 stsp 
396 0136599f 2022-10-20 stsp 	deltas.nentries = 0;
397 0136599f 2022-10-20 stsp 	STAILQ_INIT(&deltas.entries);
398 0136599f 2022-10-20 stsp 
399 0136599f 2022-10-20 stsp 	err = got_pack_resolve_delta_chain(&deltas, packidx, pack,
400 0136599f 2022-10-20 stsp 	    obj->off, obj->tslen, obj->type, obj->size,
401 0136599f 2022-10-20 stsp 	    GOT_DELTA_CHAIN_RECURSION_MAX);
402 0136599f 2022-10-20 stsp 	if (err)
403 0136599f 2022-10-20 stsp 		goto done;
404 0136599f 2022-10-20 stsp 
405 0136599f 2022-10-20 stsp 	err = got_pack_get_delta_chain_max_size(&max_size, &deltas, pack);
406 0136599f 2022-10-20 stsp 	if (err)
407 0136599f 2022-10-20 stsp 		goto done;
408 0136599f 2022-10-20 stsp 	if (max_size > GOT_DELTA_RESULT_SIZE_CACHED_MAX) {
409 0136599f 2022-10-20 stsp 		rewind(tmpfile);
410 0136599f 2022-10-20 stsp 		rewind(delta_base_file);
411 0136599f 2022-10-20 stsp 		rewind(delta_accum_file);
412 0136599f 2022-10-20 stsp 		err = got_pack_dump_delta_chain_to_file(&len, &deltas,
413 0136599f 2022-10-20 stsp 		    pack, tmpfile, delta_base_file, delta_accum_file);
414 0136599f 2022-10-20 stsp 		if (err)
415 0136599f 2022-10-20 stsp 			goto done;
416 0136599f 2022-10-20 stsp 	} else {
417 0136599f 2022-10-20 stsp 		err = got_pack_dump_delta_chain_to_mem(&buf, &len,
418 0136599f 2022-10-20 stsp 		    &deltas, pack);
419 0136599f 2022-10-20 stsp 	}
420 0136599f 2022-10-20 stsp 	if (err)
421 0136599f 2022-10-20 stsp 		goto done;
422 0136599f 2022-10-20 stsp 
423 0136599f 2022-10-20 stsp 	err = got_delta_chain_get_base_type(&base_obj_type, &deltas);
424 0136599f 2022-10-20 stsp 	if (err)
425 0136599f 2022-10-20 stsp 		goto done;
426 0136599f 2022-10-20 stsp 	err = get_obj_type_label(&obj_label, base_obj_type);
427 0136599f 2022-10-20 stsp 	if (err)
428 0136599f 2022-10-20 stsp 		goto done;
429 0136599f 2022-10-20 stsp 	if (asprintf(&header, "%s %zd", obj_label, len) == -1) {
430 0136599f 2022-10-20 stsp 		err = got_error_from_errno("asprintf");
431 0136599f 2022-10-20 stsp 		goto done;
432 0136599f 2022-10-20 stsp 	}
433 0136599f 2022-10-20 stsp 	headerlen = strlen(header) + 1;
434 0136599f 2022-10-20 stsp 	SHA1Init(&ctx);
435 0136599f 2022-10-20 stsp 	SHA1Update(&ctx, header, headerlen);
436 0136599f 2022-10-20 stsp 	if (max_size > GOT_DELTA_RESULT_SIZE_CACHED_MAX) {
437 0136599f 2022-10-20 stsp 		err = read_file_sha1(&ctx, tmpfile, len);
438 0136599f 2022-10-20 stsp 		if (err)
439 0136599f 2022-10-20 stsp 			goto done;
440 0136599f 2022-10-20 stsp 	} else
441 0136599f 2022-10-20 stsp 		SHA1Update(&ctx, buf, len);
442 0136599f 2022-10-20 stsp 	SHA1Final(obj->id.sha1, &ctx);
443 0136599f 2022-10-20 stsp done:
444 0136599f 2022-10-20 stsp 	free(buf);
445 0136599f 2022-10-20 stsp 	free(header);
446 0136599f 2022-10-20 stsp 	while (!STAILQ_EMPTY(&deltas.entries)) {
447 0136599f 2022-10-20 stsp 		delta = STAILQ_FIRST(&deltas.entries);
448 0136599f 2022-10-20 stsp 		STAILQ_REMOVE_HEAD(&deltas.entries, entry);
449 0136599f 2022-10-20 stsp 		free(delta);
450 0136599f 2022-10-20 stsp 	}
451 0136599f 2022-10-20 stsp 	return err;
452 0136599f 2022-10-20 stsp }
453 0136599f 2022-10-20 stsp 
454 0136599f 2022-10-20 stsp /* Determine the slot in the pack index a given object ID should use. */
455 0136599f 2022-10-20 stsp static int
456 0136599f 2022-10-20 stsp find_object_idx(struct got_packidx *packidx, uint8_t *sha1)
457 0136599f 2022-10-20 stsp {
458 0136599f 2022-10-20 stsp 	u_int8_t id0 = sha1[0];
459 0136599f 2022-10-20 stsp 	uint32_t nindexed = be32toh(packidx->hdr.fanout_table[0xff]);
460 0136599f 2022-10-20 stsp 	int left = 0, right = nindexed - 1;
461 0136599f 2022-10-20 stsp 	int cmp = 0, i = 0;
462 0136599f 2022-10-20 stsp 
463 0136599f 2022-10-20 stsp 	if (id0 > 0)
464 0136599f 2022-10-20 stsp 		left = be32toh(packidx->hdr.fanout_table[id0 - 1]);
465 0136599f 2022-10-20 stsp 
466 0136599f 2022-10-20 stsp 	while (left <= right) {
467 0136599f 2022-10-20 stsp 		struct got_packidx_object_id *oid;
468 0136599f 2022-10-20 stsp 
469 0136599f 2022-10-20 stsp 		i = ((left + right) / 2);
470 0136599f 2022-10-20 stsp 		oid = &packidx->hdr.sorted_ids[i];
471 0136599f 2022-10-20 stsp 
472 0136599f 2022-10-20 stsp 		cmp = memcmp(sha1, oid->sha1, SHA1_DIGEST_LENGTH);
473 0136599f 2022-10-20 stsp 		if (cmp == 0)
474 0136599f 2022-10-20 stsp 			return -1; /* object already indexed */
475 0136599f 2022-10-20 stsp 		else if (cmp > 0)
476 0136599f 2022-10-20 stsp 			left = i + 1;
477 0136599f 2022-10-20 stsp 		else if (cmp < 0)
478 0136599f 2022-10-20 stsp 			right = i - 1;
479 0136599f 2022-10-20 stsp 	}
480 0136599f 2022-10-20 stsp 
481 0136599f 2022-10-20 stsp 	return left;
482 0136599f 2022-10-20 stsp }
483 0136599f 2022-10-20 stsp 
484 0136599f 2022-10-20 stsp #if 0
485 0136599f 2022-10-20 stsp static void
486 0136599f 2022-10-20 stsp print_packidx(struct got_packidx *packidx)
487 0136599f 2022-10-20 stsp {
488 0136599f 2022-10-20 stsp 	uint32_t nindexed = be32toh(packidx->hdr.fanout_table[0xff]);
489 0136599f 2022-10-20 stsp 	int i;
490 0136599f 2022-10-20 stsp 
491 0136599f 2022-10-20 stsp 	fprintf(stderr, "object IDs:\n");
492 0136599f 2022-10-20 stsp 	for (i = 0; i < nindexed; i++) {
493 0136599f 2022-10-20 stsp 		char hex[SHA1_DIGEST_STRING_LENGTH];
494 0136599f 2022-10-20 stsp 		got_sha1_digest_to_str(packidx->hdr.sorted_ids[i].sha1,
495 0136599f 2022-10-20 stsp 		    hex, sizeof(hex));
496 0136599f 2022-10-20 stsp 		fprintf(stderr, "%s\n", hex);
497 0136599f 2022-10-20 stsp 	}
498 0136599f 2022-10-20 stsp 	fprintf(stderr, "\n");
499 0136599f 2022-10-20 stsp 
500 0136599f 2022-10-20 stsp 	fprintf(stderr, "object offsets:\n");
501 0136599f 2022-10-20 stsp 	for (i = 0; i < nindexed; i++) {
502 0136599f 2022-10-20 stsp 		uint32_t offset = be32toh(packidx->hdr.offsets[i]);
503 0136599f 2022-10-20 stsp 		if (offset & GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX) {
504 0136599f 2022-10-20 stsp 			int j = offset & GOT_PACKIDX_OFFSET_VAL_MASK;
505 0136599f 2022-10-20 stsp 			fprintf(stderr, "%u -> %llu\n", offset,
506 0136599f 2022-10-20 stsp 			    be64toh(packidx->hdr.large_offsets[j]));
507 0136599f 2022-10-20 stsp 		} else
508 0136599f 2022-10-20 stsp 			fprintf(stderr, "%u\n", offset);
509 0136599f 2022-10-20 stsp 	}
510 0136599f 2022-10-20 stsp 	fprintf(stderr, "\n");
511 0136599f 2022-10-20 stsp 
512 0136599f 2022-10-20 stsp 	fprintf(stderr, "fanout table:");
513 0136599f 2022-10-20 stsp 	for (i = 0; i <= 0xff; i++)
514 0136599f 2022-10-20 stsp 		fprintf(stderr, " %u", be32toh(packidx->hdr.fanout_table[i]));
515 0136599f 2022-10-20 stsp 	fprintf(stderr, "\n");
516 0136599f 2022-10-20 stsp }
517 0136599f 2022-10-20 stsp #endif
518 0136599f 2022-10-20 stsp 
519 0136599f 2022-10-20 stsp static void
520 0136599f 2022-10-20 stsp add_indexed_object(struct got_packidx *packidx, uint32_t idx,
521 0136599f 2022-10-20 stsp     struct got_indexed_object *obj)
522 0136599f 2022-10-20 stsp {
523 0136599f 2022-10-20 stsp 	int i;
524 0136599f 2022-10-20 stsp 
525 0136599f 2022-10-20 stsp 	memcpy(packidx->hdr.sorted_ids[idx].sha1, obj->id.sha1,
526 0136599f 2022-10-20 stsp 	    SHA1_DIGEST_LENGTH);
527 0136599f 2022-10-20 stsp 	packidx->hdr.crc32[idx] = htobe32(obj->crc);
528 0136599f 2022-10-20 stsp 	if (obj->off < GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX)
529 0136599f 2022-10-20 stsp 		packidx->hdr.offsets[idx] = htobe32(obj->off);
530 0136599f 2022-10-20 stsp 	else {
531 0136599f 2022-10-20 stsp 		packidx->hdr.offsets[idx] = htobe32(packidx->nlargeobj |
532 0136599f 2022-10-20 stsp 		    GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX);
533 0136599f 2022-10-20 stsp 		packidx->hdr.large_offsets[packidx->nlargeobj] =
534 0136599f 2022-10-20 stsp 		    htobe64(obj->off);
535 0136599f 2022-10-20 stsp 		packidx->nlargeobj++;
536 0136599f 2022-10-20 stsp 	}
537 0136599f 2022-10-20 stsp 
538 0136599f 2022-10-20 stsp 	for (i = obj->id.sha1[0]; i <= 0xff; i++) {
539 0136599f 2022-10-20 stsp 		uint32_t n = be32toh(packidx->hdr.fanout_table[i]);
540 0136599f 2022-10-20 stsp 		packidx->hdr.fanout_table[i] = htobe32(n + 1);
541 0136599f 2022-10-20 stsp 	}
542 0136599f 2022-10-20 stsp }
543 0136599f 2022-10-20 stsp 
544 0136599f 2022-10-20 stsp static int
545 0136599f 2022-10-20 stsp indexed_obj_cmp(const void *pa, const void *pb)
546 0136599f 2022-10-20 stsp {
547 0136599f 2022-10-20 stsp 	struct got_indexed_object *a, *b;
548 0136599f 2022-10-20 stsp 
549 0136599f 2022-10-20 stsp 	a = (struct got_indexed_object *)pa;
550 0136599f 2022-10-20 stsp 	b = (struct got_indexed_object *)pb;
551 0136599f 2022-10-20 stsp 	return got_object_id_cmp(&a->id, &b->id);
552 0136599f 2022-10-20 stsp }
553 0136599f 2022-10-20 stsp 
554 0136599f 2022-10-20 stsp static void
555 9316cc27 2022-10-20 stsp make_packidx(struct got_packidx *packidx, uint32_t nobj,
556 0136599f 2022-10-20 stsp     struct got_indexed_object *objects)
557 0136599f 2022-10-20 stsp {
558 0136599f 2022-10-20 stsp 	struct got_indexed_object *obj;
559 0136599f 2022-10-20 stsp 	int i;
560 0136599f 2022-10-20 stsp 	uint32_t idx = 0;
561 0136599f 2022-10-20 stsp 
562 0136599f 2022-10-20 stsp 	qsort(objects, nobj, sizeof(struct got_indexed_object),
563 0136599f 2022-10-20 stsp 	    indexed_obj_cmp);
564 0136599f 2022-10-20 stsp 
565 0136599f 2022-10-20 stsp 	memset(packidx->hdr.fanout_table, 0,
566 0136599f 2022-10-20 stsp 	    GOT_PACKIDX_V2_FANOUT_TABLE_ITEMS * sizeof(uint32_t));
567 0136599f 2022-10-20 stsp 	packidx->nlargeobj = 0;
568 0136599f 2022-10-20 stsp 
569 0136599f 2022-10-20 stsp 	for (i = 0; i < nobj; i++) {
570 0136599f 2022-10-20 stsp 		obj = &objects[i];
571 0136599f 2022-10-20 stsp 		if (obj->valid)
572 0136599f 2022-10-20 stsp 			add_indexed_object(packidx, idx++, obj);
573 0136599f 2022-10-20 stsp 	}
574 0136599f 2022-10-20 stsp }
575 0136599f 2022-10-20 stsp 
576 0136599f 2022-10-20 stsp static void
577 9316cc27 2022-10-20 stsp update_packidx(struct got_packidx *packidx, uint32_t nobj,
578 0136599f 2022-10-20 stsp     struct got_indexed_object *obj)
579 0136599f 2022-10-20 stsp {
580 0136599f 2022-10-20 stsp 	int idx;
581 0136599f 2022-10-20 stsp 	uint32_t nindexed = be32toh(packidx->hdr.fanout_table[0xff]);
582 0136599f 2022-10-20 stsp 
583 0136599f 2022-10-20 stsp 	idx = find_object_idx(packidx, obj->id.sha1);
584 0136599f 2022-10-20 stsp 	if (idx == -1) {
585 0136599f 2022-10-20 stsp 		char hex[SHA1_DIGEST_STRING_LENGTH];
586 0136599f 2022-10-20 stsp 		got_sha1_digest_to_str(obj->id.sha1, hex, sizeof(hex));
587 0136599f 2022-10-20 stsp 		return; /* object already indexed */
588 0136599f 2022-10-20 stsp 	}
589 0136599f 2022-10-20 stsp 
590 0136599f 2022-10-20 stsp 	memmove(&packidx->hdr.sorted_ids[idx + 1],
591 0136599f 2022-10-20 stsp 	    &packidx->hdr.sorted_ids[idx],
592 0136599f 2022-10-20 stsp 	    sizeof(struct got_packidx_object_id) * (nindexed - idx));
593 0136599f 2022-10-20 stsp 	memmove(&packidx->hdr.offsets[idx + 1], &packidx->hdr.offsets[idx],
594 0136599f 2022-10-20 stsp 	    sizeof(uint32_t) * (nindexed - idx));
595 0136599f 2022-10-20 stsp 
596 0136599f 2022-10-20 stsp 	add_indexed_object(packidx, idx, obj);
597 0136599f 2022-10-20 stsp }
598 0136599f 2022-10-20 stsp 
599 0136599f 2022-10-20 stsp static const struct got_error *
600 9316cc27 2022-10-20 stsp report_progress(uint32_t nobj_total, uint32_t nobj_indexed, uint32_t nobj_loose,
601 9316cc27 2022-10-20 stsp     uint32_t nobj_resolved, struct got_ratelimit *rl,
602 0136599f 2022-10-20 stsp     got_pack_index_progress_cb progress_cb, void *progress_arg)
603 0136599f 2022-10-20 stsp {
604 0136599f 2022-10-20 stsp 	const struct got_error *err;
605 0136599f 2022-10-20 stsp 	int elapsed = 0;
606 0136599f 2022-10-20 stsp 
607 0136599f 2022-10-20 stsp 	if (rl) {
608 0136599f 2022-10-20 stsp 		err = got_ratelimit_check(&elapsed, rl);
609 0136599f 2022-10-20 stsp 		if (err || !elapsed)
610 0136599f 2022-10-20 stsp 			return err;
611 0136599f 2022-10-20 stsp 	}
612 0136599f 2022-10-20 stsp 
613 0136599f 2022-10-20 stsp 	return progress_cb(progress_arg, nobj_total, nobj_indexed, nobj_loose,
614 0136599f 2022-10-20 stsp 	    nobj_resolved);
615 0136599f 2022-10-20 stsp }
616 0136599f 2022-10-20 stsp 
617 0136599f 2022-10-20 stsp const struct got_error *
618 0136599f 2022-10-20 stsp got_pack_index(struct got_pack *pack, int idxfd, FILE *tmpfile,
619 0136599f 2022-10-20 stsp     FILE *delta_base_file, FILE *delta_accum_file, uint8_t *pack_sha1_expected,
620 713d6e11 2022-10-20 stsp     got_pack_index_progress_cb progress_cb, void *progress_arg,
621 713d6e11 2022-10-20 stsp     struct got_ratelimit *rl)
622 0136599f 2022-10-20 stsp {
623 0136599f 2022-10-20 stsp 	const struct got_error *err;
624 0136599f 2022-10-20 stsp 	struct got_packfile_hdr hdr;
625 0136599f 2022-10-20 stsp 	struct got_packidx packidx;
626 0136599f 2022-10-20 stsp 	char buf[8];
627 0136599f 2022-10-20 stsp 	char pack_sha1[SHA1_DIGEST_LENGTH];
628 9316cc27 2022-10-20 stsp 	uint32_t nobj, nvalid, nloose, nresolved = 0, i;
629 0136599f 2022-10-20 stsp 	struct got_indexed_object *objects = NULL, *obj;
630 0136599f 2022-10-20 stsp 	SHA1_CTX ctx;
631 0136599f 2022-10-20 stsp 	uint8_t packidx_hash[SHA1_DIGEST_LENGTH];
632 0136599f 2022-10-20 stsp 	ssize_t r, w;
633 0136599f 2022-10-20 stsp 	int pass, have_ref_deltas = 0, first_delta_idx = -1;
634 0136599f 2022-10-20 stsp 	size_t mapoff = 0;
635 0136599f 2022-10-20 stsp 	int p_indexed = 0, last_p_indexed = -1;
636 0136599f 2022-10-20 stsp 	int p_resolved = 0, last_p_resolved = -1;
637 0136599f 2022-10-20 stsp 
638 0136599f 2022-10-20 stsp 	/* Require that pack file header and SHA1 trailer are present. */
639 0136599f 2022-10-20 stsp 	if (pack->filesize < sizeof(hdr) + SHA1_DIGEST_LENGTH)
640 0136599f 2022-10-20 stsp 		return got_error_msg(GOT_ERR_BAD_PACKFILE,
641 0136599f 2022-10-20 stsp 		    "short pack file");
642 0136599f 2022-10-20 stsp 
643 0136599f 2022-10-20 stsp 	if (pack->map) {
644 0136599f 2022-10-20 stsp 		memcpy(&hdr, pack->map, sizeof(hdr));
645 0136599f 2022-10-20 stsp 		mapoff += sizeof(hdr);
646 0136599f 2022-10-20 stsp 	} else {
647 0136599f 2022-10-20 stsp 		r = read(pack->fd, &hdr, sizeof(hdr));
648 0136599f 2022-10-20 stsp 		if (r == -1)
649 0136599f 2022-10-20 stsp 			return got_error_from_errno("read");
650 0136599f 2022-10-20 stsp 		if (r < sizeof(hdr))
651 0136599f 2022-10-20 stsp 			return got_error_msg(GOT_ERR_BAD_PACKFILE,
652 0136599f 2022-10-20 stsp 			    "short pack file");
653 0136599f 2022-10-20 stsp 	}
654 0136599f 2022-10-20 stsp 
655 0136599f 2022-10-20 stsp 	if (hdr.signature != htobe32(GOT_PACKFILE_SIGNATURE))
656 0136599f 2022-10-20 stsp 		return got_error_msg(GOT_ERR_BAD_PACKFILE,
657 0136599f 2022-10-20 stsp 		    "bad packfile signature");
658 0136599f 2022-10-20 stsp 	if (hdr.version != htobe32(GOT_PACKFILE_VERSION))
659 0136599f 2022-10-20 stsp 		return got_error_msg(GOT_ERR_BAD_PACKFILE,
660 0136599f 2022-10-20 stsp 		    "bad packfile version");
661 0136599f 2022-10-20 stsp 	nobj = be32toh(hdr.nobjects);
662 0136599f 2022-10-20 stsp 	if (nobj == 0)
663 0136599f 2022-10-20 stsp 		return got_error_msg(GOT_ERR_BAD_PACKFILE,
664 0136599f 2022-10-20 stsp 		    "bad packfile with zero objects");
665 0136599f 2022-10-20 stsp 
666 0136599f 2022-10-20 stsp 	/* We compute the SHA1 of pack file contents and verify later on. */
667 0136599f 2022-10-20 stsp 	SHA1Init(&ctx);
668 0136599f 2022-10-20 stsp 	SHA1Update(&ctx, (void *)&hdr, sizeof(hdr));
669 0136599f 2022-10-20 stsp 
670 0136599f 2022-10-20 stsp 	/*
671 0136599f 2022-10-20 stsp 	 * Create an in-memory pack index which will grow as objects
672 0136599f 2022-10-20 stsp 	 * IDs in the pack file are discovered. Only fields used to
673 0136599f 2022-10-20 stsp 	 * read deltified objects will be needed by the pack.c library
674 0136599f 2022-10-20 stsp 	 * code, so setting up just a pack index header is sufficient.
675 0136599f 2022-10-20 stsp 	 */
676 0136599f 2022-10-20 stsp 	memset(&packidx, 0, sizeof(packidx));
677 0136599f 2022-10-20 stsp 	packidx.hdr.magic = malloc(sizeof(uint32_t));
678 0136599f 2022-10-20 stsp 	if (packidx.hdr.magic == NULL)
679 0136599f 2022-10-20 stsp 		return got_error_from_errno("malloc");
680 0136599f 2022-10-20 stsp 	*packidx.hdr.magic = htobe32(GOT_PACKIDX_V2_MAGIC);
681 0136599f 2022-10-20 stsp 	packidx.hdr.version = malloc(sizeof(uint32_t));
682 0136599f 2022-10-20 stsp 	if (packidx.hdr.version == NULL) {
683 0136599f 2022-10-20 stsp 		err = got_error_from_errno("malloc");
684 0136599f 2022-10-20 stsp 		goto done;
685 0136599f 2022-10-20 stsp 	}
686 0136599f 2022-10-20 stsp 	*packidx.hdr.version = htobe32(GOT_PACKIDX_VERSION);
687 0136599f 2022-10-20 stsp 	packidx.hdr.fanout_table = calloc(GOT_PACKIDX_V2_FANOUT_TABLE_ITEMS,
688 0136599f 2022-10-20 stsp 	    sizeof(uint32_t));
689 0136599f 2022-10-20 stsp 	if (packidx.hdr.fanout_table == NULL) {
690 0136599f 2022-10-20 stsp 		err = got_error_from_errno("calloc");
691 0136599f 2022-10-20 stsp 		goto done;
692 0136599f 2022-10-20 stsp 	}
693 0136599f 2022-10-20 stsp 	packidx.hdr.sorted_ids = calloc(nobj,
694 0136599f 2022-10-20 stsp 	    sizeof(struct got_packidx_object_id));
695 0136599f 2022-10-20 stsp 	if (packidx.hdr.sorted_ids == NULL) {
696 0136599f 2022-10-20 stsp 		err = got_error_from_errno("calloc");
697 0136599f 2022-10-20 stsp 		goto done;
698 0136599f 2022-10-20 stsp 	}
699 0136599f 2022-10-20 stsp 	packidx.hdr.crc32 = calloc(nobj, sizeof(uint32_t));
700 0136599f 2022-10-20 stsp 	if (packidx.hdr.crc32 == NULL) {
701 0136599f 2022-10-20 stsp 		err = got_error_from_errno("calloc");
702 0136599f 2022-10-20 stsp 		goto done;
703 0136599f 2022-10-20 stsp 	}
704 0136599f 2022-10-20 stsp 	packidx.hdr.offsets = calloc(nobj, sizeof(uint32_t));
705 0136599f 2022-10-20 stsp 	if (packidx.hdr.offsets == NULL) {
706 0136599f 2022-10-20 stsp 		err = got_error_from_errno("calloc");
707 0136599f 2022-10-20 stsp 		goto done;
708 0136599f 2022-10-20 stsp 	}
709 0136599f 2022-10-20 stsp 	/* Large offsets table is empty for pack files < 2 GB. */
710 0136599f 2022-10-20 stsp 	if (pack->filesize >= GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX) {
711 0136599f 2022-10-20 stsp 		packidx.hdr.large_offsets = calloc(nobj, sizeof(uint64_t));
712 0136599f 2022-10-20 stsp 		if (packidx.hdr.large_offsets == NULL) {
713 0136599f 2022-10-20 stsp 			err = got_error_from_errno("calloc");
714 0136599f 2022-10-20 stsp 			goto done;
715 0136599f 2022-10-20 stsp 		}
716 0136599f 2022-10-20 stsp 	}
717 0136599f 2022-10-20 stsp 
718 0136599f 2022-10-20 stsp 	nvalid = 0;
719 0136599f 2022-10-20 stsp 	nloose = 0;
720 0136599f 2022-10-20 stsp 	objects = calloc(nobj, sizeof(struct got_indexed_object));
721 0136599f 2022-10-20 stsp 	if (objects == NULL)
722 0136599f 2022-10-20 stsp 		return got_error_from_errno("calloc");
723 0136599f 2022-10-20 stsp 
724 0136599f 2022-10-20 stsp 	/*
725 0136599f 2022-10-20 stsp 	 * First pass: locate all objects and identify un-deltified objects.
726 0136599f 2022-10-20 stsp 	 *
727 0136599f 2022-10-20 stsp 	 * When this pass has completed we will know offset, type, size, and
728 0136599f 2022-10-20 stsp 	 * CRC information for all objects in this pack file. We won't know
729 0136599f 2022-10-20 stsp 	 * any of the actual object IDs of deltified objects yet since we
730 0136599f 2022-10-20 stsp 	 * will not yet attempt to combine deltas.
731 0136599f 2022-10-20 stsp 	 */
732 0136599f 2022-10-20 stsp 	pass = 1;
733 0136599f 2022-10-20 stsp 	for (i = 0; i < nobj; i++) {
734 0136599f 2022-10-20 stsp 		/* Don't send too many progress privsep messages. */
735 0136599f 2022-10-20 stsp 		p_indexed = ((i + 1) * 100) / nobj;
736 0136599f 2022-10-20 stsp 		if (p_indexed != last_p_indexed) {
737 0136599f 2022-10-20 stsp 			err = report_progress(nobj, i + 1, nloose, 0,
738 713d6e11 2022-10-20 stsp 			    rl, progress_cb, progress_arg);
739 0136599f 2022-10-20 stsp 			if (err)
740 0136599f 2022-10-20 stsp 				goto done;
741 0136599f 2022-10-20 stsp 			last_p_indexed = p_indexed;
742 0136599f 2022-10-20 stsp 		}
743 0136599f 2022-10-20 stsp 
744 0136599f 2022-10-20 stsp 		obj = &objects[i];
745 0136599f 2022-10-20 stsp 		obj->crc = crc32(0L, NULL, 0);
746 0136599f 2022-10-20 stsp 
747 0136599f 2022-10-20 stsp 		/* Store offset to type+size information for this object. */
748 0136599f 2022-10-20 stsp 		if (pack->map) {
749 0136599f 2022-10-20 stsp 			obj->off = mapoff;
750 0136599f 2022-10-20 stsp 		} else {
751 0136599f 2022-10-20 stsp 			obj->off = lseek(pack->fd, 0, SEEK_CUR);
752 0136599f 2022-10-20 stsp 			if (obj->off == -1) {
753 0136599f 2022-10-20 stsp 				err = got_error_from_errno("lseek");
754 0136599f 2022-10-20 stsp 				goto done;
755 0136599f 2022-10-20 stsp 			}
756 0136599f 2022-10-20 stsp 		}
757 0136599f 2022-10-20 stsp 
758 0136599f 2022-10-20 stsp 		err = read_packed_object(pack, obj, tmpfile, &ctx);
759 0136599f 2022-10-20 stsp 		if (err)
760 0136599f 2022-10-20 stsp 			goto done;
761 0136599f 2022-10-20 stsp 
762 0136599f 2022-10-20 stsp 		if (pack->map) {
763 0136599f 2022-10-20 stsp 			mapoff += obj->tslen + obj->len;
764 0136599f 2022-10-20 stsp 		} else {
765 0136599f 2022-10-20 stsp 			if (lseek(pack->fd, obj->off + obj->tslen + obj->len,
766 0136599f 2022-10-20 stsp 			    SEEK_SET) == -1) {
767 0136599f 2022-10-20 stsp 				err = got_error_from_errno("lseek");
768 0136599f 2022-10-20 stsp 				goto done;
769 0136599f 2022-10-20 stsp 			}
770 0136599f 2022-10-20 stsp 		}
771 0136599f 2022-10-20 stsp 
772 0136599f 2022-10-20 stsp 		if (obj->type == GOT_OBJ_TYPE_BLOB ||
773 0136599f 2022-10-20 stsp 		    obj->type == GOT_OBJ_TYPE_TREE ||
774 0136599f 2022-10-20 stsp 		    obj->type == GOT_OBJ_TYPE_COMMIT ||
775 0136599f 2022-10-20 stsp 		    obj->type == GOT_OBJ_TYPE_TAG) {
776 0136599f 2022-10-20 stsp 			obj->valid = 1;
777 0136599f 2022-10-20 stsp 			nloose++;
778 0136599f 2022-10-20 stsp 		} else {
779 0136599f 2022-10-20 stsp 			if (first_delta_idx == -1)
780 0136599f 2022-10-20 stsp 				first_delta_idx = i;
781 0136599f 2022-10-20 stsp 			if (obj->type == GOT_OBJ_TYPE_REF_DELTA)
782 0136599f 2022-10-20 stsp 				have_ref_deltas = 1;
783 0136599f 2022-10-20 stsp 		}
784 0136599f 2022-10-20 stsp 	}
785 0136599f 2022-10-20 stsp 	nvalid = nloose;
786 0136599f 2022-10-20 stsp 
787 0136599f 2022-10-20 stsp 	/*
788 0136599f 2022-10-20 stsp 	 * Having done a full pass over the pack file and can now
789 0136599f 2022-10-20 stsp 	 * verify its checksum.
790 0136599f 2022-10-20 stsp 	 */
791 0136599f 2022-10-20 stsp 	SHA1Final(pack_sha1, &ctx);
792 13b2bc37 2022-10-23 stsp 
793 0136599f 2022-10-20 stsp 	if (memcmp(pack_sha1_expected, pack_sha1, SHA1_DIGEST_LENGTH) != 0) {
794 13b2bc37 2022-10-23 stsp 		err = got_error(GOT_ERR_PACKFILE_CSUM);
795 0136599f 2022-10-20 stsp 		goto done;
796 0136599f 2022-10-20 stsp 	}
797 0136599f 2022-10-20 stsp 
798 0136599f 2022-10-20 stsp 	/* Verify the SHA1 checksum stored at the end of the pack file. */
799 0136599f 2022-10-20 stsp 	if (pack->map) {
800 0136599f 2022-10-20 stsp 		memcpy(pack_sha1_expected, pack->map +
801 0136599f 2022-10-20 stsp 		    pack->filesize - SHA1_DIGEST_LENGTH,
802 0136599f 2022-10-20 stsp 		    SHA1_DIGEST_LENGTH);
803 0136599f 2022-10-20 stsp 	} else {
804 0136599f 2022-10-20 stsp 		ssize_t n;
805 0136599f 2022-10-20 stsp 		if (lseek(pack->fd, -SHA1_DIGEST_LENGTH, SEEK_END) == -1) {
806 0136599f 2022-10-20 stsp 			err = got_error_from_errno("lseek");
807 0136599f 2022-10-20 stsp 			goto done;
808 0136599f 2022-10-20 stsp 		}
809 0136599f 2022-10-20 stsp 		n = read(pack->fd, pack_sha1_expected, SHA1_DIGEST_LENGTH);
810 0136599f 2022-10-20 stsp 		if (n == -1) {
811 0136599f 2022-10-20 stsp 			err = got_error_from_errno("read");
812 0136599f 2022-10-20 stsp 			goto done;
813 0136599f 2022-10-20 stsp 		}
814 0136599f 2022-10-20 stsp 		if (n != SHA1_DIGEST_LENGTH) {
815 0136599f 2022-10-20 stsp 			err = got_error(GOT_ERR_IO);
816 0136599f 2022-10-20 stsp 			goto done;
817 0136599f 2022-10-20 stsp 		}
818 0136599f 2022-10-20 stsp 	}
819 0136599f 2022-10-20 stsp 	if (memcmp(pack_sha1, pack_sha1_expected, SHA1_DIGEST_LENGTH) != 0) {
820 0136599f 2022-10-20 stsp 		err = got_error_msg(GOT_ERR_BAD_PACKFILE,
821 0136599f 2022-10-20 stsp 		    "bad checksum in pack file trailer");
822 0136599f 2022-10-20 stsp 		goto done;
823 0136599f 2022-10-20 stsp 	}
824 0136599f 2022-10-20 stsp 
825 0136599f 2022-10-20 stsp 	if (first_delta_idx == -1)
826 0136599f 2022-10-20 stsp 		first_delta_idx = 0;
827 0136599f 2022-10-20 stsp 
828 0136599f 2022-10-20 stsp 	/* In order to resolve ref deltas we need an in-progress pack index. */
829 0136599f 2022-10-20 stsp 	if (have_ref_deltas)
830 0136599f 2022-10-20 stsp 		make_packidx(&packidx, nobj, objects);
831 0136599f 2022-10-20 stsp 
832 0136599f 2022-10-20 stsp 	/*
833 0136599f 2022-10-20 stsp 	 * Second pass: We can now resolve deltas to compute the IDs of
834 0136599f 2022-10-20 stsp 	 * objects which appear in deltified form. Because deltas can be
835 0136599f 2022-10-20 stsp 	 * chained this pass may require a couple of iterations until all
836 0136599f 2022-10-20 stsp 	 * IDs of deltified objects have been discovered.
837 0136599f 2022-10-20 stsp 	 */
838 0136599f 2022-10-20 stsp 	pass++;
839 0136599f 2022-10-20 stsp 	while (nvalid != nobj) {
840 0136599f 2022-10-20 stsp 		int n = 0;
841 0136599f 2022-10-20 stsp 		/*
842 0136599f 2022-10-20 stsp 		 * This loop will only run once unless the pack file
843 0136599f 2022-10-20 stsp 		 * contains ref deltas which refer to objects located
844 0136599f 2022-10-20 stsp 		 * later in the pack file, which is unusual.
845 0136599f 2022-10-20 stsp 		 * Offset deltas can always be resolved in one pass
846 0136599f 2022-10-20 stsp 		 * unless the packfile is corrupt.
847 0136599f 2022-10-20 stsp 		 */
848 0136599f 2022-10-20 stsp 		for (i = first_delta_idx; i < nobj; i++) {
849 0136599f 2022-10-20 stsp 			obj = &objects[i];
850 0136599f 2022-10-20 stsp 			if (obj->type != GOT_OBJ_TYPE_REF_DELTA &&
851 0136599f 2022-10-20 stsp 			    obj->type != GOT_OBJ_TYPE_OFFSET_DELTA)
852 0136599f 2022-10-20 stsp 				continue;
853 0136599f 2022-10-20 stsp 
854 0136599f 2022-10-20 stsp 			if (obj->valid)
855 0136599f 2022-10-20 stsp 				continue;
856 0136599f 2022-10-20 stsp 
857 0136599f 2022-10-20 stsp 			if (pack->map == NULL && lseek(pack->fd,
858 0136599f 2022-10-20 stsp 			    obj->off + obj->tslen, SEEK_SET) == -1) {
859 0136599f 2022-10-20 stsp 				err = got_error_from_errno("lseek");
860 0136599f 2022-10-20 stsp 				goto done;
861 0136599f 2022-10-20 stsp 			}
862 0136599f 2022-10-20 stsp 
863 0136599f 2022-10-20 stsp 			err = resolve_deltified_object(pack, &packidx, obj,
864 0136599f 2022-10-20 stsp 			    tmpfile, delta_base_file, delta_accum_file);
865 0136599f 2022-10-20 stsp 			if (err) {
866 0136599f 2022-10-20 stsp 				if (err->code != GOT_ERR_NO_OBJ)
867 0136599f 2022-10-20 stsp 					goto done;
868 0136599f 2022-10-20 stsp 				/*
869 0136599f 2022-10-20 stsp 				 * We cannot resolve this object yet because
870 0136599f 2022-10-20 stsp 				 * a delta base is unknown. Try again later.
871 0136599f 2022-10-20 stsp 				 */
872 0136599f 2022-10-20 stsp 				continue;
873 0136599f 2022-10-20 stsp 			}
874 0136599f 2022-10-20 stsp 
875 0136599f 2022-10-20 stsp 			obj->valid = 1;
876 0136599f 2022-10-20 stsp 			n++;
877 0136599f 2022-10-20 stsp 			if (have_ref_deltas)
878 0136599f 2022-10-20 stsp 				update_packidx(&packidx, nobj, obj);
879 0136599f 2022-10-20 stsp 			/* Don't send too many progress privsep messages. */
880 0136599f 2022-10-20 stsp 			p_resolved = ((nresolved + n) * 100) / nobj;
881 0136599f 2022-10-20 stsp 			if (p_resolved != last_p_resolved) {
882 0136599f 2022-10-20 stsp 				err = report_progress(nobj, nobj,
883 713d6e11 2022-10-20 stsp 				    nloose, nresolved + n, rl,
884 0136599f 2022-10-20 stsp 				    progress_cb, progress_arg);
885 0136599f 2022-10-20 stsp 				if (err)
886 0136599f 2022-10-20 stsp 					goto done;
887 0136599f 2022-10-20 stsp 				last_p_resolved = p_resolved;
888 0136599f 2022-10-20 stsp 			}
889 0136599f 2022-10-20 stsp 
890 0136599f 2022-10-20 stsp 		}
891 0136599f 2022-10-20 stsp 		if (pass++ > 3 && n == 0) {
892 0136599f 2022-10-20 stsp 			err = got_error_msg(GOT_ERR_BAD_PACKFILE,
893 0136599f 2022-10-20 stsp 			    "could not resolve any of deltas; packfile could "
894 0136599f 2022-10-20 stsp 			    "be corrupt");
895 0136599f 2022-10-20 stsp 			goto done;
896 0136599f 2022-10-20 stsp 		}
897 0136599f 2022-10-20 stsp 		nresolved += n;
898 0136599f 2022-10-20 stsp 		nvalid += nresolved;
899 0136599f 2022-10-20 stsp 	}
900 0136599f 2022-10-20 stsp 
901 0136599f 2022-10-20 stsp 	if (nloose + nresolved != nobj) {
902 0136599f 2022-10-20 stsp 		static char msg[64];
903 0136599f 2022-10-20 stsp 		snprintf(msg, sizeof(msg), "discovered only %d of %d objects",
904 0136599f 2022-10-20 stsp 		    nloose + nresolved, nobj);
905 0136599f 2022-10-20 stsp 		err = got_error_msg(GOT_ERR_BAD_PACKFILE, msg);
906 0136599f 2022-10-20 stsp 		goto done;
907 0136599f 2022-10-20 stsp 	}
908 0136599f 2022-10-20 stsp 
909 0136599f 2022-10-20 stsp 	err = report_progress(nobj, nobj, nloose, nresolved, NULL,
910 0136599f 2022-10-20 stsp 	    progress_cb, progress_arg);
911 0136599f 2022-10-20 stsp 	if (err)
912 0136599f 2022-10-20 stsp 		goto done;
913 0136599f 2022-10-20 stsp 
914 0136599f 2022-10-20 stsp 	make_packidx(&packidx, nobj, objects);
915 0136599f 2022-10-20 stsp 
916 0136599f 2022-10-20 stsp 	free(objects);
917 0136599f 2022-10-20 stsp 	objects = NULL;
918 0136599f 2022-10-20 stsp 
919 0136599f 2022-10-20 stsp 	SHA1Init(&ctx);
920 0136599f 2022-10-20 stsp 	putbe32(buf, GOT_PACKIDX_V2_MAGIC);
921 0136599f 2022-10-20 stsp 	putbe32(buf + 4, GOT_PACKIDX_VERSION);
922 13b2bc37 2022-10-23 stsp 	err = got_pack_hwrite(idxfd, buf, 8, &ctx);
923 0136599f 2022-10-20 stsp 	if (err)
924 0136599f 2022-10-20 stsp 		goto done;
925 13b2bc37 2022-10-23 stsp 	err = got_pack_hwrite(idxfd, packidx.hdr.fanout_table,
926 0136599f 2022-10-20 stsp 	    GOT_PACKIDX_V2_FANOUT_TABLE_ITEMS * sizeof(uint32_t), &ctx);
927 0136599f 2022-10-20 stsp 	if (err)
928 0136599f 2022-10-20 stsp 		goto done;
929 13b2bc37 2022-10-23 stsp 	err = got_pack_hwrite(idxfd, packidx.hdr.sorted_ids,
930 0136599f 2022-10-20 stsp 	    nobj * SHA1_DIGEST_LENGTH, &ctx);
931 0136599f 2022-10-20 stsp 	if (err)
932 0136599f 2022-10-20 stsp 		goto done;
933 13b2bc37 2022-10-23 stsp 	err = got_pack_hwrite(idxfd, packidx.hdr.crc32,
934 13b2bc37 2022-10-23 stsp 	    nobj * sizeof(uint32_t), &ctx);
935 0136599f 2022-10-20 stsp 	if (err)
936 0136599f 2022-10-20 stsp 		goto done;
937 13b2bc37 2022-10-23 stsp 	err = got_pack_hwrite(idxfd, packidx.hdr.offsets,
938 13b2bc37 2022-10-23 stsp 	    nobj * sizeof(uint32_t), &ctx);
939 0136599f 2022-10-20 stsp 	if (err)
940 0136599f 2022-10-20 stsp 		goto done;
941 0136599f 2022-10-20 stsp 	if (packidx.nlargeobj > 0) {
942 13b2bc37 2022-10-23 stsp 		err = got_pack_hwrite(idxfd, packidx.hdr.large_offsets,
943 0136599f 2022-10-20 stsp 		    packidx.nlargeobj * sizeof(uint64_t), &ctx);
944 0136599f 2022-10-20 stsp 		if (err)
945 0136599f 2022-10-20 stsp 			goto done;
946 0136599f 2022-10-20 stsp 	}
947 13b2bc37 2022-10-23 stsp 	err = got_pack_hwrite(idxfd, pack_sha1, SHA1_DIGEST_LENGTH, &ctx);
948 0136599f 2022-10-20 stsp 	if (err)
949 0136599f 2022-10-20 stsp 		goto done;
950 0136599f 2022-10-20 stsp 
951 0136599f 2022-10-20 stsp 	SHA1Final(packidx_hash, &ctx);
952 0136599f 2022-10-20 stsp 	w = write(idxfd, packidx_hash, sizeof(packidx_hash));
953 0136599f 2022-10-20 stsp 	if (w == -1) {
954 0136599f 2022-10-20 stsp 		err = got_error_from_errno("write");
955 0136599f 2022-10-20 stsp 		goto done;
956 0136599f 2022-10-20 stsp 	}
957 0136599f 2022-10-20 stsp 	if (w != sizeof(packidx_hash)) {
958 0136599f 2022-10-20 stsp 		err = got_error(GOT_ERR_IO);
959 0136599f 2022-10-20 stsp 		goto done;
960 0136599f 2022-10-20 stsp 	}
961 0136599f 2022-10-20 stsp done:
962 0136599f 2022-10-20 stsp 	free(objects);
963 0136599f 2022-10-20 stsp 	free(packidx.hdr.magic);
964 0136599f 2022-10-20 stsp 	free(packidx.hdr.version);
965 0136599f 2022-10-20 stsp 	free(packidx.hdr.fanout_table);
966 0136599f 2022-10-20 stsp 	free(packidx.hdr.sorted_ids);
967 0136599f 2022-10-20 stsp 	free(packidx.hdr.offsets);
968 0136599f 2022-10-20 stsp 	free(packidx.hdr.large_offsets);
969 0136599f 2022-10-20 stsp 	return err;
970 0136599f 2022-10-20 stsp }