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 5822e79e 2023-02-23 op #include <sha2.h>
 36 0136599f 2022-10-20 stsp #include <endian.h>
 37 0136599f 2022-10-20 stsp #include <fcntl.h>
 38 0136599f 2022-10-20 stsp #include <unistd.h>
 39 0136599f 2022-10-20 stsp #include <zlib.h>
 40 0136599f 2022-10-20 stsp #include <err.h>
 41 0136599f 2022-10-20 stsp #include <assert.h>
 42 0136599f 2022-10-20 stsp #include <dirent.h>
 43 0136599f 2022-10-20 stsp 
 44 0136599f 2022-10-20 stsp #include "got_error.h"
 45 0136599f 2022-10-20 stsp #include "got_object.h"
 46 0136599f 2022-10-20 stsp 
 47 53bf0b54 2023-02-23 op #include "got_lib_hash.h"
 48 0136599f 2022-10-20 stsp #include "got_lib_delta.h"
 49 0136599f 2022-10-20 stsp #include "got_lib_inflate.h"
 50 0136599f 2022-10-20 stsp #include "got_lib_object.h"
 51 0136599f 2022-10-20 stsp #include "got_lib_object_parse.h"
 52 0136599f 2022-10-20 stsp #include "got_lib_object_idset.h"
 53 0136599f 2022-10-20 stsp #include "got_lib_privsep.h"
 54 0136599f 2022-10-20 stsp #include "got_lib_pack.h"
 55 0136599f 2022-10-20 stsp #include "got_lib_ratelimit.h"
 56 0136599f 2022-10-20 stsp #include "got_lib_pack_index.h"
 57 0136599f 2022-10-20 stsp #include "got_lib_delta_cache.h"
 58 0136599f 2022-10-20 stsp 
 59 0136599f 2022-10-20 stsp struct got_indexed_object {
 60 0136599f 2022-10-20 stsp 	struct got_object_id id;
 61 0136599f 2022-10-20 stsp 
 62 0136599f 2022-10-20 stsp 	/*
 63 0136599f 2022-10-20 stsp 	 * Has this object been fully resolved?
 64 0136599f 2022-10-20 stsp 	 * If so, we know its ID, otherwise we don't and 'id' is invalid.
 65 0136599f 2022-10-20 stsp 	 */
 66 0136599f 2022-10-20 stsp 	int valid;
 67 0136599f 2022-10-20 stsp 
 68 0136599f 2022-10-20 stsp 	/* Offset of type+size field for this object in pack file. */
 69 0136599f 2022-10-20 stsp 	off_t off;
 70 0136599f 2022-10-20 stsp 
 71 0136599f 2022-10-20 stsp 	/* Type+size values parsed from pack file. */
 72 0136599f 2022-10-20 stsp 	uint8_t type;
 73 0136599f 2022-10-20 stsp 	uint64_t size;
 74 0136599f 2022-10-20 stsp 
 75 0136599f 2022-10-20 stsp 	/* Length of on-disk type+size data. */
 76 0136599f 2022-10-20 stsp 	size_t tslen;
 77 0136599f 2022-10-20 stsp 
 78 0136599f 2022-10-20 stsp 	/* Length of object data following type+size. */
 79 0136599f 2022-10-20 stsp 	size_t len;
 80 0136599f 2022-10-20 stsp 
 81 0136599f 2022-10-20 stsp 	uint32_t crc;
 82 0136599f 2022-10-20 stsp 
 83 0136599f 2022-10-20 stsp 	union {
 84 0136599f 2022-10-20 stsp 		struct {
 85 0136599f 2022-10-20 stsp 			/* For ref deltas. */
 86 0136599f 2022-10-20 stsp 			struct got_object_id ref_id;
 87 0136599f 2022-10-20 stsp 		} ref;
 88 0136599f 2022-10-20 stsp 		struct {
 89 0136599f 2022-10-20 stsp 			/* For offset deltas. */
 90 0136599f 2022-10-20 stsp 			off_t base_offset;
 91 0136599f 2022-10-20 stsp 			size_t base_offsetlen;
 92 0136599f 2022-10-20 stsp 		} ofs;
 93 0136599f 2022-10-20 stsp 	} delta;
 94 0136599f 2022-10-20 stsp };
 95 0136599f 2022-10-20 stsp 
 96 0136599f 2022-10-20 stsp static void
 97 0136599f 2022-10-20 stsp putbe32(char *b, uint32_t n)
 98 0136599f 2022-10-20 stsp {
 99 0136599f 2022-10-20 stsp 	b[0] = n >> 24;
100 0136599f 2022-10-20 stsp 	b[1] = n >> 16;
101 0136599f 2022-10-20 stsp 	b[2] = n >> 8;
102 0136599f 2022-10-20 stsp 	b[3] = n >> 0;
103 0136599f 2022-10-20 stsp }
104 0136599f 2022-10-20 stsp 
105 0136599f 2022-10-20 stsp static const struct got_error *
106 ae25a666 2023-02-23 op read_checksum(uint32_t *crc, struct got_hash *ctx, int fd, size_t len)
107 0136599f 2022-10-20 stsp {
108 0136599f 2022-10-20 stsp 	uint8_t buf[8192];
109 0136599f 2022-10-20 stsp 	size_t n;
110 0136599f 2022-10-20 stsp 	ssize_t r;
111 0136599f 2022-10-20 stsp 
112 0136599f 2022-10-20 stsp 	for (n = len; n > 0; n -= r){
113 0136599f 2022-10-20 stsp 		r = read(fd, buf, n > sizeof(buf) ? sizeof(buf) : n);
114 0136599f 2022-10-20 stsp 		if (r == -1)
115 0136599f 2022-10-20 stsp 			return got_error_from_errno("read");
116 0136599f 2022-10-20 stsp 		if (r == 0)
117 0136599f 2022-10-20 stsp 			break;
118 0136599f 2022-10-20 stsp 		if (crc)
119 0136599f 2022-10-20 stsp 			*crc = crc32(*crc, buf, r);
120 ae25a666 2023-02-23 op 		if (ctx)
121 ae25a666 2023-02-23 op 			got_hash_update(ctx, buf, r);
122 0136599f 2022-10-20 stsp 	}
123 0136599f 2022-10-20 stsp 
124 0136599f 2022-10-20 stsp 	return NULL;
125 0136599f 2022-10-20 stsp }
126 0136599f 2022-10-20 stsp 
127 0136599f 2022-10-20 stsp static const struct got_error *
128 ae25a666 2023-02-23 op read_file_digest(struct got_hash *ctx, FILE *f, size_t len)
129 0136599f 2022-10-20 stsp {
130 0136599f 2022-10-20 stsp 	uint8_t buf[8192];
131 0136599f 2022-10-20 stsp 	size_t n, r;
132 0136599f 2022-10-20 stsp 
133 0136599f 2022-10-20 stsp 	for (n = len; n > 0; n -= r) {
134 0136599f 2022-10-20 stsp 		r = fread(buf, 1, n > sizeof(buf) ? sizeof(buf) : n, f);
135 0136599f 2022-10-20 stsp 		if (r == 0) {
136 0136599f 2022-10-20 stsp 			if (feof(f))
137 0136599f 2022-10-20 stsp 				return NULL;
138 0136599f 2022-10-20 stsp 			return got_ferror(f, GOT_ERR_IO);
139 0136599f 2022-10-20 stsp 		}
140 ae25a666 2023-02-23 op 		got_hash_update(ctx, buf, r);
141 0136599f 2022-10-20 stsp 	}
142 0136599f 2022-10-20 stsp 
143 0136599f 2022-10-20 stsp 	return NULL;
144 0136599f 2022-10-20 stsp }
145 0136599f 2022-10-20 stsp 
146 0136599f 2022-10-20 stsp static const struct got_error *
147 0136599f 2022-10-20 stsp read_packed_object(struct got_pack *pack, struct got_indexed_object *obj,
148 ae25a666 2023-02-23 op     FILE *tmpfile, struct got_hash *pack_sha1_ctx)
149 0136599f 2022-10-20 stsp {
150 0136599f 2022-10-20 stsp 	const struct got_error *err = NULL;
151 ae25a666 2023-02-23 op 	struct got_hash ctx;
152 0136599f 2022-10-20 stsp 	uint8_t *data = NULL;
153 0136599f 2022-10-20 stsp 	size_t datalen = 0;
154 0136599f 2022-10-20 stsp 	ssize_t n;
155 0136599f 2022-10-20 stsp 	char *header;
156 0136599f 2022-10-20 stsp 	size_t headerlen;
157 0136599f 2022-10-20 stsp 	const char *obj_label;
158 0136599f 2022-10-20 stsp 	size_t mapoff = obj->off;
159 0136599f 2022-10-20 stsp 	struct got_inflate_checksum csum;
160 0136599f 2022-10-20 stsp 
161 0136599f 2022-10-20 stsp 	memset(&csum, 0, sizeof(csum));
162 ae25a666 2023-02-23 op 	csum.input_ctx = pack_sha1_ctx;
163 0136599f 2022-10-20 stsp 	csum.input_crc = &obj->crc;
164 0136599f 2022-10-20 stsp 
165 0136599f 2022-10-20 stsp 	err = got_pack_parse_object_type_and_size(&obj->type, &obj->size,
166 0136599f 2022-10-20 stsp 	    &obj->tslen, pack, obj->off);
167 0136599f 2022-10-20 stsp 	if (err)
168 0136599f 2022-10-20 stsp 		return err;
169 0136599f 2022-10-20 stsp 
170 0136599f 2022-10-20 stsp 	if (pack->map) {
171 0136599f 2022-10-20 stsp 		obj->crc = crc32(obj->crc, pack->map + mapoff, obj->tslen);
172 ae25a666 2023-02-23 op 		got_hash_update(pack_sha1_ctx, pack->map + mapoff, obj->tslen);
173 0136599f 2022-10-20 stsp 		mapoff += obj->tslen;
174 0136599f 2022-10-20 stsp 	} else {
175 0136599f 2022-10-20 stsp 		/* XXX Seek back and get the CRC of on-disk type+size bytes. */
176 0136599f 2022-10-20 stsp 		if (lseek(pack->fd, obj->off, SEEK_SET) == -1)
177 0136599f 2022-10-20 stsp 			return got_error_from_errno("lseek");
178 0136599f 2022-10-20 stsp 		err = read_checksum(&obj->crc, pack_sha1_ctx,
179 0136599f 2022-10-20 stsp 		    pack->fd, obj->tslen);
180 0136599f 2022-10-20 stsp 		if (err)
181 0136599f 2022-10-20 stsp 			return err;
182 0136599f 2022-10-20 stsp 	}
183 0136599f 2022-10-20 stsp 
184 0136599f 2022-10-20 stsp 	switch (obj->type) {
185 0136599f 2022-10-20 stsp 	case GOT_OBJ_TYPE_BLOB:
186 0136599f 2022-10-20 stsp 	case GOT_OBJ_TYPE_COMMIT:
187 0136599f 2022-10-20 stsp 	case GOT_OBJ_TYPE_TREE:
188 0136599f 2022-10-20 stsp 	case GOT_OBJ_TYPE_TAG:
189 0136599f 2022-10-20 stsp 		if (obj->size > GOT_DELTA_RESULT_SIZE_CACHED_MAX) {
190 0136599f 2022-10-20 stsp 			if (fseek(tmpfile, 0L, SEEK_SET) == -1) {
191 0136599f 2022-10-20 stsp 				err = got_error_from_errno("fseek");
192 0136599f 2022-10-20 stsp 				break;
193 0136599f 2022-10-20 stsp 			}
194 0136599f 2022-10-20 stsp 			if (pack->map) {
195 0136599f 2022-10-20 stsp 				err = got_inflate_to_file_mmap(&datalen,
196 0136599f 2022-10-20 stsp 				    &obj->len, &csum, pack->map, mapoff,
197 0136599f 2022-10-20 stsp 				    pack->filesize - mapoff, tmpfile);
198 0136599f 2022-10-20 stsp 			} else {
199 0136599f 2022-10-20 stsp 				err = got_inflate_to_file_fd(&datalen,
200 0136599f 2022-10-20 stsp 				    &obj->len, &csum, pack->fd, tmpfile);
201 0136599f 2022-10-20 stsp 			}
202 0136599f 2022-10-20 stsp 		} else {
203 0136599f 2022-10-20 stsp 			if (pack->map) {
204 0136599f 2022-10-20 stsp 				err = got_inflate_to_mem_mmap(&data, &datalen,
205 0136599f 2022-10-20 stsp 				    &obj->len, &csum, pack->map, mapoff,
206 0136599f 2022-10-20 stsp 				    pack->filesize - mapoff);
207 0136599f 2022-10-20 stsp 			} else {
208 0136599f 2022-10-20 stsp 				err = got_inflate_to_mem_fd(&data, &datalen,
209 0136599f 2022-10-20 stsp 				    &obj->len, &csum, obj->size, pack->fd);
210 0136599f 2022-10-20 stsp 			}
211 0136599f 2022-10-20 stsp 		}
212 0136599f 2022-10-20 stsp 		if (err)
213 0136599f 2022-10-20 stsp 			break;
214 ae25a666 2023-02-23 op 		got_hash_init(&ctx, GOT_HASH_SHA1);
215 9afa3de2 2023-04-04 stsp 		err = got_object_type_label(&obj_label, obj->type);
216 0136599f 2022-10-20 stsp 		if (err) {
217 0136599f 2022-10-20 stsp 			free(data);
218 0136599f 2022-10-20 stsp 			break;
219 0136599f 2022-10-20 stsp 		}
220 0136599f 2022-10-20 stsp 		if (asprintf(&header, "%s %lld", obj_label,
221 0136599f 2022-10-20 stsp 		    (long long)obj->size) == -1) {
222 0136599f 2022-10-20 stsp 			err = got_error_from_errno("asprintf");
223 0136599f 2022-10-20 stsp 			free(data);
224 0136599f 2022-10-20 stsp 			break;
225 0136599f 2022-10-20 stsp 		}
226 0136599f 2022-10-20 stsp 		headerlen = strlen(header) + 1;
227 ae25a666 2023-02-23 op 		got_hash_update(&ctx, header, headerlen);
228 0136599f 2022-10-20 stsp 		if (obj->size > GOT_DELTA_RESULT_SIZE_CACHED_MAX) {
229 ae25a666 2023-02-23 op 			err = read_file_digest(&ctx, tmpfile, datalen);
230 0136599f 2022-10-20 stsp 			if (err) {
231 0136599f 2022-10-20 stsp 				free(header);
232 0136599f 2022-10-20 stsp 				free(data);
233 0136599f 2022-10-20 stsp 				break;
234 0136599f 2022-10-20 stsp 			}
235 0136599f 2022-10-20 stsp 		} else
236 ae25a666 2023-02-23 op 			got_hash_update(&ctx, data, datalen);
237 ae25a666 2023-02-23 op 		got_hash_final_object_id(&ctx, &obj->id);
238 0136599f 2022-10-20 stsp 		free(header);
239 0136599f 2022-10-20 stsp 		free(data);
240 0136599f 2022-10-20 stsp 		break;
241 0136599f 2022-10-20 stsp 	case GOT_OBJ_TYPE_REF_DELTA:
242 0136599f 2022-10-20 stsp 		memset(obj->id.sha1, 0xff, SHA1_DIGEST_LENGTH);
243 0136599f 2022-10-20 stsp 		if (pack->map) {
244 0136599f 2022-10-20 stsp 			if (mapoff + SHA1_DIGEST_LENGTH >= pack->filesize) {
245 0136599f 2022-10-20 stsp 				err = got_error(GOT_ERR_BAD_PACKFILE);
246 0136599f 2022-10-20 stsp 				break;
247 0136599f 2022-10-20 stsp 			}
248 0136599f 2022-10-20 stsp 			memcpy(obj->delta.ref.ref_id.sha1, pack->map + mapoff,
249 0136599f 2022-10-20 stsp 			    SHA1_DIGEST_LENGTH);
250 0136599f 2022-10-20 stsp 			obj->crc = crc32(obj->crc, pack->map + mapoff,
251 0136599f 2022-10-20 stsp 			    SHA1_DIGEST_LENGTH);
252 ae25a666 2023-02-23 op 			got_hash_update(pack_sha1_ctx, pack->map + mapoff,
253 0136599f 2022-10-20 stsp 			    SHA1_DIGEST_LENGTH);
254 0136599f 2022-10-20 stsp 			mapoff += SHA1_DIGEST_LENGTH;
255 0136599f 2022-10-20 stsp 			err = got_inflate_to_mem_mmap(NULL, &datalen,
256 0136599f 2022-10-20 stsp 			    &obj->len, &csum, pack->map, mapoff,
257 0136599f 2022-10-20 stsp 			    pack->filesize - mapoff);
258 0136599f 2022-10-20 stsp 			if (err)
259 0136599f 2022-10-20 stsp 				break;
260 0136599f 2022-10-20 stsp 		} else {
261 0136599f 2022-10-20 stsp 			n = read(pack->fd, obj->delta.ref.ref_id.sha1,
262 0136599f 2022-10-20 stsp 			    SHA1_DIGEST_LENGTH);
263 0136599f 2022-10-20 stsp 			if (n == -1) {
264 0136599f 2022-10-20 stsp 				err = got_error_from_errno("read");
265 0136599f 2022-10-20 stsp 				break;
266 0136599f 2022-10-20 stsp 			}
267 0136599f 2022-10-20 stsp 			if (n < sizeof(obj->id)) {
268 0136599f 2022-10-20 stsp 				err = got_error(GOT_ERR_BAD_PACKFILE);
269 0136599f 2022-10-20 stsp 				break;
270 0136599f 2022-10-20 stsp 			}
271 0136599f 2022-10-20 stsp 			obj->crc = crc32(obj->crc, obj->delta.ref.ref_id.sha1,
272 0136599f 2022-10-20 stsp 			    SHA1_DIGEST_LENGTH);
273 ae25a666 2023-02-23 op 			got_hash_update(pack_sha1_ctx,
274 ae25a666 2023-02-23 op 			    obj->delta.ref.ref_id.sha1, SHA1_DIGEST_LENGTH);
275 0136599f 2022-10-20 stsp 			err = got_inflate_to_mem_fd(NULL, &datalen, &obj->len,
276 0136599f 2022-10-20 stsp 			    &csum, obj->size, pack->fd);
277 0136599f 2022-10-20 stsp 			if (err)
278 0136599f 2022-10-20 stsp 				break;
279 0136599f 2022-10-20 stsp 		}
280 0136599f 2022-10-20 stsp 		obj->len += SHA1_DIGEST_LENGTH;
281 0136599f 2022-10-20 stsp 		break;
282 0136599f 2022-10-20 stsp 	case GOT_OBJ_TYPE_OFFSET_DELTA:
283 0136599f 2022-10-20 stsp 		memset(obj->id.sha1, 0xff, SHA1_DIGEST_LENGTH);
284 0136599f 2022-10-20 stsp 		err = got_pack_parse_offset_delta(&obj->delta.ofs.base_offset,
285 0136599f 2022-10-20 stsp 		    &obj->delta.ofs.base_offsetlen, pack, obj->off,
286 0136599f 2022-10-20 stsp 		    obj->tslen);
287 0136599f 2022-10-20 stsp 		if (err)
288 0136599f 2022-10-20 stsp 			break;
289 0136599f 2022-10-20 stsp 
290 0136599f 2022-10-20 stsp 		if (pack->map) {
291 5326bd73 2022-10-24 op 			if (mapoff + obj->delta.ofs.base_offsetlen >=
292 5326bd73 2022-10-24 op 			    pack->filesize) {
293 5326bd73 2022-10-24 op 				err = got_error(GOT_ERR_BAD_PACKFILE);
294 5326bd73 2022-10-24 op 				break;
295 5326bd73 2022-10-24 op 			}
296 5326bd73 2022-10-24 op 
297 ad4cc361 2022-10-27 op 			if (mapoff + obj->delta.ofs.base_offsetlen >
298 ad4cc361 2022-10-27 op 			    SIZE_MAX) {
299 ad4cc361 2022-10-27 op 				err = got_error_fmt(GOT_ERR_RANGE,
300 ad4cc361 2022-10-27 op 				    "mapoff %lld would overflow size_t",
301 ad4cc361 2022-10-27 op 				    (long long)mapoff
302 ad4cc361 2022-10-27 op 				    + obj->delta.ofs.base_offsetlen);
303 5061349d 2024-05-22 stsp 				break;
304 ad4cc361 2022-10-27 op 			}
305 ad4cc361 2022-10-27 op 
306 0136599f 2022-10-20 stsp 			obj->crc = crc32(obj->crc, pack->map + mapoff,
307 0136599f 2022-10-20 stsp 			    obj->delta.ofs.base_offsetlen);
308 ae25a666 2023-02-23 op 			got_hash_update(pack_sha1_ctx, pack->map + mapoff,
309 0136599f 2022-10-20 stsp 			    obj->delta.ofs.base_offsetlen);
310 0136599f 2022-10-20 stsp 			mapoff += obj->delta.ofs.base_offsetlen;
311 0136599f 2022-10-20 stsp 			err = got_inflate_to_mem_mmap(NULL, &datalen,
312 0136599f 2022-10-20 stsp 			    &obj->len, &csum, pack->map, mapoff,
313 0136599f 2022-10-20 stsp 			    pack->filesize - mapoff);
314 0136599f 2022-10-20 stsp 			if (err)
315 0136599f 2022-10-20 stsp 				break;
316 0136599f 2022-10-20 stsp 		} else {
317 0136599f 2022-10-20 stsp 			/*
318 0136599f 2022-10-20 stsp 			 * XXX Seek back and get CRC and SHA1 of on-disk
319 0136599f 2022-10-20 stsp 			 * offset bytes.
320 0136599f 2022-10-20 stsp 			 */
321 0136599f 2022-10-20 stsp 			if (lseek(pack->fd, obj->off + obj->tslen, SEEK_SET)
322 0136599f 2022-10-20 stsp 			    == -1) {
323 0136599f 2022-10-20 stsp 				err = got_error_from_errno("lseek");
324 0136599f 2022-10-20 stsp 				break;
325 0136599f 2022-10-20 stsp 			}
326 0136599f 2022-10-20 stsp 			err = read_checksum(&obj->crc, pack_sha1_ctx,
327 0136599f 2022-10-20 stsp 			    pack->fd, obj->delta.ofs.base_offsetlen);
328 0136599f 2022-10-20 stsp 			if (err)
329 0136599f 2022-10-20 stsp 				break;
330 0136599f 2022-10-20 stsp 
331 0136599f 2022-10-20 stsp 			err = got_inflate_to_mem_fd(NULL, &datalen, &obj->len,
332 0136599f 2022-10-20 stsp 			    &csum, obj->size, pack->fd);
333 0136599f 2022-10-20 stsp 			if (err)
334 0136599f 2022-10-20 stsp 				break;
335 0136599f 2022-10-20 stsp 		}
336 0136599f 2022-10-20 stsp 		obj->len += obj->delta.ofs.base_offsetlen;
337 0136599f 2022-10-20 stsp 		break;
338 0136599f 2022-10-20 stsp 	default:
339 0136599f 2022-10-20 stsp 		err = got_error(GOT_ERR_OBJ_TYPE);
340 0136599f 2022-10-20 stsp 		break;
341 0136599f 2022-10-20 stsp 	}
342 0136599f 2022-10-20 stsp 
343 0136599f 2022-10-20 stsp 	return err;
344 0136599f 2022-10-20 stsp }
345 0136599f 2022-10-20 stsp 
346 13b2bc37 2022-10-23 stsp const struct got_error *
347 ae25a666 2023-02-23 op got_pack_hwrite(int fd, void *buf, int len, struct got_hash *ctx)
348 0136599f 2022-10-20 stsp {
349 0136599f 2022-10-20 stsp 	ssize_t w;
350 0136599f 2022-10-20 stsp 
351 ae25a666 2023-02-23 op 	got_hash_update(ctx, buf, len);
352 0136599f 2022-10-20 stsp 
353 0136599f 2022-10-20 stsp 	w = write(fd, buf, len);
354 0136599f 2022-10-20 stsp 	if (w == -1)
355 0136599f 2022-10-20 stsp 		return got_error_from_errno("write");
356 0136599f 2022-10-20 stsp 	if (w != len)
357 0136599f 2022-10-20 stsp 		return got_error(GOT_ERR_IO);
358 0136599f 2022-10-20 stsp 
359 0136599f 2022-10-20 stsp 	return NULL;
360 0136599f 2022-10-20 stsp }
361 0136599f 2022-10-20 stsp 
362 0136599f 2022-10-20 stsp static const struct got_error *
363 0136599f 2022-10-20 stsp resolve_deltified_object(struct got_pack *pack, struct got_packidx *packidx,
364 0136599f 2022-10-20 stsp     struct got_indexed_object *obj, FILE *tmpfile, FILE *delta_base_file,
365 0136599f 2022-10-20 stsp     FILE *delta_accum_file)
366 0136599f 2022-10-20 stsp {
367 0136599f 2022-10-20 stsp 	const struct got_error *err = NULL;
368 0136599f 2022-10-20 stsp 	struct got_delta_chain deltas;
369 0136599f 2022-10-20 stsp 	struct got_delta *delta;
370 0136599f 2022-10-20 stsp 	uint8_t *buf = NULL;
371 0136599f 2022-10-20 stsp 	size_t len = 0;
372 ae25a666 2023-02-23 op 	struct got_hash ctx;
373 0136599f 2022-10-20 stsp 	char *header = NULL;
374 0136599f 2022-10-20 stsp 	size_t headerlen;
375 0136599f 2022-10-20 stsp 	uint64_t max_size;
376 0136599f 2022-10-20 stsp 	int base_obj_type;
377 0136599f 2022-10-20 stsp 	const char *obj_label;
378 0136599f 2022-10-20 stsp 
379 0136599f 2022-10-20 stsp 	deltas.nentries = 0;
380 0136599f 2022-10-20 stsp 	STAILQ_INIT(&deltas.entries);
381 0136599f 2022-10-20 stsp 
382 0136599f 2022-10-20 stsp 	err = got_pack_resolve_delta_chain(&deltas, packidx, pack,
383 0136599f 2022-10-20 stsp 	    obj->off, obj->tslen, obj->type, obj->size,
384 0136599f 2022-10-20 stsp 	    GOT_DELTA_CHAIN_RECURSION_MAX);
385 0136599f 2022-10-20 stsp 	if (err)
386 0136599f 2022-10-20 stsp 		goto done;
387 0136599f 2022-10-20 stsp 
388 0136599f 2022-10-20 stsp 	err = got_pack_get_delta_chain_max_size(&max_size, &deltas, pack);
389 0136599f 2022-10-20 stsp 	if (err)
390 0136599f 2022-10-20 stsp 		goto done;
391 0136599f 2022-10-20 stsp 	if (max_size > GOT_DELTA_RESULT_SIZE_CACHED_MAX) {
392 0136599f 2022-10-20 stsp 		rewind(tmpfile);
393 0136599f 2022-10-20 stsp 		rewind(delta_base_file);
394 0136599f 2022-10-20 stsp 		rewind(delta_accum_file);
395 0136599f 2022-10-20 stsp 		err = got_pack_dump_delta_chain_to_file(&len, &deltas,
396 0136599f 2022-10-20 stsp 		    pack, tmpfile, delta_base_file, delta_accum_file);
397 0136599f 2022-10-20 stsp 		if (err)
398 0136599f 2022-10-20 stsp 			goto done;
399 0136599f 2022-10-20 stsp 	} else {
400 0136599f 2022-10-20 stsp 		err = got_pack_dump_delta_chain_to_mem(&buf, &len,
401 0136599f 2022-10-20 stsp 		    &deltas, pack);
402 0136599f 2022-10-20 stsp 	}
403 0136599f 2022-10-20 stsp 	if (err)
404 0136599f 2022-10-20 stsp 		goto done;
405 0136599f 2022-10-20 stsp 
406 0136599f 2022-10-20 stsp 	err = got_delta_chain_get_base_type(&base_obj_type, &deltas);
407 0136599f 2022-10-20 stsp 	if (err)
408 0136599f 2022-10-20 stsp 		goto done;
409 9afa3de2 2023-04-04 stsp 	err = got_object_type_label(&obj_label, base_obj_type);
410 0136599f 2022-10-20 stsp 	if (err)
411 0136599f 2022-10-20 stsp 		goto done;
412 0136599f 2022-10-20 stsp 	if (asprintf(&header, "%s %zd", obj_label, len) == -1) {
413 0136599f 2022-10-20 stsp 		err = got_error_from_errno("asprintf");
414 0136599f 2022-10-20 stsp 		goto done;
415 0136599f 2022-10-20 stsp 	}
416 0136599f 2022-10-20 stsp 	headerlen = strlen(header) + 1;
417 ae25a666 2023-02-23 op 	got_hash_init(&ctx, GOT_HASH_SHA1);
418 ae25a666 2023-02-23 op 	got_hash_update(&ctx, header, headerlen);
419 0136599f 2022-10-20 stsp 	if (max_size > GOT_DELTA_RESULT_SIZE_CACHED_MAX) {
420 ae25a666 2023-02-23 op 		err = read_file_digest(&ctx, tmpfile, len);
421 0136599f 2022-10-20 stsp 		if (err)
422 0136599f 2022-10-20 stsp 			goto done;
423 0136599f 2022-10-20 stsp 	} else
424 ae25a666 2023-02-23 op 		got_hash_update(&ctx, buf, len);
425 ae25a666 2023-02-23 op 	got_hash_final_object_id(&ctx, &obj->id);
426 0136599f 2022-10-20 stsp done:
427 0136599f 2022-10-20 stsp 	free(buf);
428 0136599f 2022-10-20 stsp 	free(header);
429 0136599f 2022-10-20 stsp 	while (!STAILQ_EMPTY(&deltas.entries)) {
430 0136599f 2022-10-20 stsp 		delta = STAILQ_FIRST(&deltas.entries);
431 0136599f 2022-10-20 stsp 		STAILQ_REMOVE_HEAD(&deltas.entries, entry);
432 0136599f 2022-10-20 stsp 		free(delta);
433 0136599f 2022-10-20 stsp 	}
434 0136599f 2022-10-20 stsp 	return err;
435 0136599f 2022-10-20 stsp }
436 0136599f 2022-10-20 stsp 
437 0136599f 2022-10-20 stsp /* Determine the slot in the pack index a given object ID should use. */
438 0136599f 2022-10-20 stsp static int
439 0136599f 2022-10-20 stsp find_object_idx(struct got_packidx *packidx, uint8_t *sha1)
440 0136599f 2022-10-20 stsp {
441 0136599f 2022-10-20 stsp 	u_int8_t id0 = sha1[0];
442 0136599f 2022-10-20 stsp 	uint32_t nindexed = be32toh(packidx->hdr.fanout_table[0xff]);
443 0136599f 2022-10-20 stsp 	int left = 0, right = nindexed - 1;
444 0136599f 2022-10-20 stsp 	int cmp = 0, i = 0;
445 0136599f 2022-10-20 stsp 
446 0136599f 2022-10-20 stsp 	if (id0 > 0)
447 0136599f 2022-10-20 stsp 		left = be32toh(packidx->hdr.fanout_table[id0 - 1]);
448 0136599f 2022-10-20 stsp 
449 0136599f 2022-10-20 stsp 	while (left <= right) {
450 0136599f 2022-10-20 stsp 		struct got_packidx_object_id *oid;
451 0136599f 2022-10-20 stsp 
452 0136599f 2022-10-20 stsp 		i = ((left + right) / 2);
453 0136599f 2022-10-20 stsp 		oid = &packidx->hdr.sorted_ids[i];
454 0136599f 2022-10-20 stsp 
455 0136599f 2022-10-20 stsp 		cmp = memcmp(sha1, oid->sha1, SHA1_DIGEST_LENGTH);
456 0136599f 2022-10-20 stsp 		if (cmp == 0)
457 0136599f 2022-10-20 stsp 			return -1; /* object already indexed */
458 0136599f 2022-10-20 stsp 		else if (cmp > 0)
459 0136599f 2022-10-20 stsp 			left = i + 1;
460 0136599f 2022-10-20 stsp 		else if (cmp < 0)
461 0136599f 2022-10-20 stsp 			right = i - 1;
462 0136599f 2022-10-20 stsp 	}
463 0136599f 2022-10-20 stsp 
464 0136599f 2022-10-20 stsp 	return left;
465 0136599f 2022-10-20 stsp }
466 0136599f 2022-10-20 stsp 
467 0136599f 2022-10-20 stsp #if 0
468 0136599f 2022-10-20 stsp static void
469 0136599f 2022-10-20 stsp print_packidx(struct got_packidx *packidx)
470 0136599f 2022-10-20 stsp {
471 0136599f 2022-10-20 stsp 	uint32_t nindexed = be32toh(packidx->hdr.fanout_table[0xff]);
472 0136599f 2022-10-20 stsp 	int i;
473 0136599f 2022-10-20 stsp 
474 0136599f 2022-10-20 stsp 	fprintf(stderr, "object IDs:\n");
475 0136599f 2022-10-20 stsp 	for (i = 0; i < nindexed; i++) {
476 0136599f 2022-10-20 stsp 		char hex[SHA1_DIGEST_STRING_LENGTH];
477 0136599f 2022-10-20 stsp 		got_sha1_digest_to_str(packidx->hdr.sorted_ids[i].sha1,
478 0136599f 2022-10-20 stsp 		    hex, sizeof(hex));
479 0136599f 2022-10-20 stsp 		fprintf(stderr, "%s\n", hex);
480 0136599f 2022-10-20 stsp 	}
481 0136599f 2022-10-20 stsp 	fprintf(stderr, "\n");
482 0136599f 2022-10-20 stsp 
483 0136599f 2022-10-20 stsp 	fprintf(stderr, "object offsets:\n");
484 0136599f 2022-10-20 stsp 	for (i = 0; i < nindexed; i++) {
485 0136599f 2022-10-20 stsp 		uint32_t offset = be32toh(packidx->hdr.offsets[i]);
486 0136599f 2022-10-20 stsp 		if (offset & GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX) {
487 0136599f 2022-10-20 stsp 			int j = offset & GOT_PACKIDX_OFFSET_VAL_MASK;
488 0136599f 2022-10-20 stsp 			fprintf(stderr, "%u -> %llu\n", offset,
489 0136599f 2022-10-20 stsp 			    be64toh(packidx->hdr.large_offsets[j]));
490 0136599f 2022-10-20 stsp 		} else
491 0136599f 2022-10-20 stsp 			fprintf(stderr, "%u\n", offset);
492 0136599f 2022-10-20 stsp 	}
493 0136599f 2022-10-20 stsp 	fprintf(stderr, "\n");
494 0136599f 2022-10-20 stsp 
495 0136599f 2022-10-20 stsp 	fprintf(stderr, "fanout table:");
496 0136599f 2022-10-20 stsp 	for (i = 0; i <= 0xff; i++)
497 0136599f 2022-10-20 stsp 		fprintf(stderr, " %u", be32toh(packidx->hdr.fanout_table[i]));
498 0136599f 2022-10-20 stsp 	fprintf(stderr, "\n");
499 0136599f 2022-10-20 stsp }
500 0136599f 2022-10-20 stsp #endif
501 0136599f 2022-10-20 stsp 
502 0136599f 2022-10-20 stsp static void
503 0136599f 2022-10-20 stsp add_indexed_object(struct got_packidx *packidx, uint32_t idx,
504 0136599f 2022-10-20 stsp     struct got_indexed_object *obj)
505 0136599f 2022-10-20 stsp {
506 0136599f 2022-10-20 stsp 	int i;
507 0136599f 2022-10-20 stsp 
508 0136599f 2022-10-20 stsp 	memcpy(packidx->hdr.sorted_ids[idx].sha1, obj->id.sha1,
509 0136599f 2022-10-20 stsp 	    SHA1_DIGEST_LENGTH);
510 0136599f 2022-10-20 stsp 	packidx->hdr.crc32[idx] = htobe32(obj->crc);
511 0136599f 2022-10-20 stsp 	if (obj->off < GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX)
512 0136599f 2022-10-20 stsp 		packidx->hdr.offsets[idx] = htobe32(obj->off);
513 0136599f 2022-10-20 stsp 	else {
514 0136599f 2022-10-20 stsp 		packidx->hdr.offsets[idx] = htobe32(packidx->nlargeobj |
515 0136599f 2022-10-20 stsp 		    GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX);
516 0136599f 2022-10-20 stsp 		packidx->hdr.large_offsets[packidx->nlargeobj] =
517 0136599f 2022-10-20 stsp 		    htobe64(obj->off);
518 0136599f 2022-10-20 stsp 		packidx->nlargeobj++;
519 0136599f 2022-10-20 stsp 	}
520 0136599f 2022-10-20 stsp 
521 0136599f 2022-10-20 stsp 	for (i = obj->id.sha1[0]; i <= 0xff; i++) {
522 0136599f 2022-10-20 stsp 		uint32_t n = be32toh(packidx->hdr.fanout_table[i]);
523 0136599f 2022-10-20 stsp 		packidx->hdr.fanout_table[i] = htobe32(n + 1);
524 0136599f 2022-10-20 stsp 	}
525 0136599f 2022-10-20 stsp }
526 0136599f 2022-10-20 stsp 
527 0136599f 2022-10-20 stsp static int
528 0136599f 2022-10-20 stsp indexed_obj_cmp(const void *pa, const void *pb)
529 0136599f 2022-10-20 stsp {
530 0136599f 2022-10-20 stsp 	struct got_indexed_object *a, *b;
531 0136599f 2022-10-20 stsp 
532 0136599f 2022-10-20 stsp 	a = (struct got_indexed_object *)pa;
533 0136599f 2022-10-20 stsp 	b = (struct got_indexed_object *)pb;
534 0136599f 2022-10-20 stsp 	return got_object_id_cmp(&a->id, &b->id);
535 0136599f 2022-10-20 stsp }
536 0136599f 2022-10-20 stsp 
537 0136599f 2022-10-20 stsp static void
538 9316cc27 2022-10-20 stsp make_packidx(struct got_packidx *packidx, uint32_t nobj,
539 0136599f 2022-10-20 stsp     struct got_indexed_object *objects)
540 0136599f 2022-10-20 stsp {
541 0136599f 2022-10-20 stsp 	struct got_indexed_object *obj;
542 0136599f 2022-10-20 stsp 	int i;
543 0136599f 2022-10-20 stsp 	uint32_t idx = 0;
544 0136599f 2022-10-20 stsp 
545 0136599f 2022-10-20 stsp 	qsort(objects, nobj, sizeof(struct got_indexed_object),
546 0136599f 2022-10-20 stsp 	    indexed_obj_cmp);
547 0136599f 2022-10-20 stsp 
548 0136599f 2022-10-20 stsp 	memset(packidx->hdr.fanout_table, 0,
549 0136599f 2022-10-20 stsp 	    GOT_PACKIDX_V2_FANOUT_TABLE_ITEMS * sizeof(uint32_t));
550 0136599f 2022-10-20 stsp 	packidx->nlargeobj = 0;
551 0136599f 2022-10-20 stsp 
552 0136599f 2022-10-20 stsp 	for (i = 0; i < nobj; i++) {
553 0136599f 2022-10-20 stsp 		obj = &objects[i];
554 0136599f 2022-10-20 stsp 		if (obj->valid)
555 0136599f 2022-10-20 stsp 			add_indexed_object(packidx, idx++, obj);
556 0136599f 2022-10-20 stsp 	}
557 0136599f 2022-10-20 stsp }
558 0136599f 2022-10-20 stsp 
559 0136599f 2022-10-20 stsp static void
560 9316cc27 2022-10-20 stsp update_packidx(struct got_packidx *packidx, uint32_t nobj,
561 0136599f 2022-10-20 stsp     struct got_indexed_object *obj)
562 0136599f 2022-10-20 stsp {
563 0136599f 2022-10-20 stsp 	int idx;
564 0136599f 2022-10-20 stsp 	uint32_t nindexed = be32toh(packidx->hdr.fanout_table[0xff]);
565 0136599f 2022-10-20 stsp 
566 0136599f 2022-10-20 stsp 	idx = find_object_idx(packidx, obj->id.sha1);
567 09cbb981 2023-02-03 op 	if (idx == -1)
568 0136599f 2022-10-20 stsp 		return; /* object already indexed */
569 0136599f 2022-10-20 stsp 
570 0136599f 2022-10-20 stsp 	memmove(&packidx->hdr.sorted_ids[idx + 1],
571 0136599f 2022-10-20 stsp 	    &packidx->hdr.sorted_ids[idx],
572 0136599f 2022-10-20 stsp 	    sizeof(struct got_packidx_object_id) * (nindexed - idx));
573 0136599f 2022-10-20 stsp 	memmove(&packidx->hdr.offsets[idx + 1], &packidx->hdr.offsets[idx],
574 0136599f 2022-10-20 stsp 	    sizeof(uint32_t) * (nindexed - idx));
575 0136599f 2022-10-20 stsp 
576 0136599f 2022-10-20 stsp 	add_indexed_object(packidx, idx, obj);
577 0136599f 2022-10-20 stsp }
578 0136599f 2022-10-20 stsp 
579 0136599f 2022-10-20 stsp static const struct got_error *
580 9316cc27 2022-10-20 stsp report_progress(uint32_t nobj_total, uint32_t nobj_indexed, uint32_t nobj_loose,
581 9316cc27 2022-10-20 stsp     uint32_t nobj_resolved, struct got_ratelimit *rl,
582 0136599f 2022-10-20 stsp     got_pack_index_progress_cb progress_cb, void *progress_arg)
583 0136599f 2022-10-20 stsp {
584 0136599f 2022-10-20 stsp 	const struct got_error *err;
585 0136599f 2022-10-20 stsp 	int elapsed = 0;
586 0136599f 2022-10-20 stsp 
587 0136599f 2022-10-20 stsp 	if (rl) {
588 0136599f 2022-10-20 stsp 		err = got_ratelimit_check(&elapsed, rl);
589 0136599f 2022-10-20 stsp 		if (err || !elapsed)
590 0136599f 2022-10-20 stsp 			return err;
591 0136599f 2022-10-20 stsp 	}
592 0136599f 2022-10-20 stsp 
593 0136599f 2022-10-20 stsp 	return progress_cb(progress_arg, nobj_total, nobj_indexed, nobj_loose,
594 0136599f 2022-10-20 stsp 	    nobj_resolved);
595 0136599f 2022-10-20 stsp }
596 0136599f 2022-10-20 stsp 
597 0136599f 2022-10-20 stsp const struct got_error *
598 0136599f 2022-10-20 stsp got_pack_index(struct got_pack *pack, int idxfd, FILE *tmpfile,
599 0136599f 2022-10-20 stsp     FILE *delta_base_file, FILE *delta_accum_file, uint8_t *pack_sha1_expected,
600 713d6e11 2022-10-20 stsp     got_pack_index_progress_cb progress_cb, void *progress_arg,
601 713d6e11 2022-10-20 stsp     struct got_ratelimit *rl)
602 0136599f 2022-10-20 stsp {
603 0136599f 2022-10-20 stsp 	const struct got_error *err;
604 0136599f 2022-10-20 stsp 	struct got_packfile_hdr hdr;
605 0136599f 2022-10-20 stsp 	struct got_packidx packidx;
606 0136599f 2022-10-20 stsp 	char buf[8];
607 0136599f 2022-10-20 stsp 	char pack_sha1[SHA1_DIGEST_LENGTH];
608 9316cc27 2022-10-20 stsp 	uint32_t nobj, nvalid, nloose, nresolved = 0, i;
609 0136599f 2022-10-20 stsp 	struct got_indexed_object *objects = NULL, *obj;
610 ae25a666 2023-02-23 op 	struct got_hash ctx;
611 0136599f 2022-10-20 stsp 	uint8_t packidx_hash[SHA1_DIGEST_LENGTH];
612 0136599f 2022-10-20 stsp 	ssize_t r, w;
613 0136599f 2022-10-20 stsp 	int pass, have_ref_deltas = 0, first_delta_idx = -1;
614 0136599f 2022-10-20 stsp 	size_t mapoff = 0;
615 0136599f 2022-10-20 stsp 	int p_indexed = 0, last_p_indexed = -1;
616 0136599f 2022-10-20 stsp 	int p_resolved = 0, last_p_resolved = -1;
617 0136599f 2022-10-20 stsp 
618 0136599f 2022-10-20 stsp 	/* Require that pack file header and SHA1 trailer are present. */
619 0136599f 2022-10-20 stsp 	if (pack->filesize < sizeof(hdr) + SHA1_DIGEST_LENGTH)
620 0136599f 2022-10-20 stsp 		return got_error_msg(GOT_ERR_BAD_PACKFILE,
621 0136599f 2022-10-20 stsp 		    "short pack file");
622 0136599f 2022-10-20 stsp 
623 0136599f 2022-10-20 stsp 	if (pack->map) {
624 0136599f 2022-10-20 stsp 		memcpy(&hdr, pack->map, sizeof(hdr));
625 0136599f 2022-10-20 stsp 		mapoff += sizeof(hdr);
626 0136599f 2022-10-20 stsp 	} else {
627 0136599f 2022-10-20 stsp 		r = read(pack->fd, &hdr, sizeof(hdr));
628 0136599f 2022-10-20 stsp 		if (r == -1)
629 0136599f 2022-10-20 stsp 			return got_error_from_errno("read");
630 0136599f 2022-10-20 stsp 		if (r < sizeof(hdr))
631 0136599f 2022-10-20 stsp 			return got_error_msg(GOT_ERR_BAD_PACKFILE,
632 0136599f 2022-10-20 stsp 			    "short pack file");
633 0136599f 2022-10-20 stsp 	}
634 0136599f 2022-10-20 stsp 
635 0136599f 2022-10-20 stsp 	if (hdr.signature != htobe32(GOT_PACKFILE_SIGNATURE))
636 0136599f 2022-10-20 stsp 		return got_error_msg(GOT_ERR_BAD_PACKFILE,
637 0136599f 2022-10-20 stsp 		    "bad packfile signature");
638 0136599f 2022-10-20 stsp 	if (hdr.version != htobe32(GOT_PACKFILE_VERSION))
639 0136599f 2022-10-20 stsp 		return got_error_msg(GOT_ERR_BAD_PACKFILE,
640 0136599f 2022-10-20 stsp 		    "bad packfile version");
641 0136599f 2022-10-20 stsp 	nobj = be32toh(hdr.nobjects);
642 0136599f 2022-10-20 stsp 	if (nobj == 0)
643 0136599f 2022-10-20 stsp 		return got_error_msg(GOT_ERR_BAD_PACKFILE,
644 0136599f 2022-10-20 stsp 		    "bad packfile with zero objects");
645 0136599f 2022-10-20 stsp 
646 0136599f 2022-10-20 stsp 	/* We compute the SHA1 of pack file contents and verify later on. */
647 ae25a666 2023-02-23 op 	got_hash_init(&ctx, GOT_HASH_SHA1);
648 ae25a666 2023-02-23 op 	got_hash_update(&ctx, &hdr, sizeof(hdr));
649 0136599f 2022-10-20 stsp 
650 0136599f 2022-10-20 stsp 	/*
651 0136599f 2022-10-20 stsp 	 * Create an in-memory pack index which will grow as objects
652 0136599f 2022-10-20 stsp 	 * IDs in the pack file are discovered. Only fields used to
653 0136599f 2022-10-20 stsp 	 * read deltified objects will be needed by the pack.c library
654 0136599f 2022-10-20 stsp 	 * code, so setting up just a pack index header is sufficient.
655 0136599f 2022-10-20 stsp 	 */
656 0136599f 2022-10-20 stsp 	memset(&packidx, 0, sizeof(packidx));
657 0136599f 2022-10-20 stsp 	packidx.hdr.magic = malloc(sizeof(uint32_t));
658 0136599f 2022-10-20 stsp 	if (packidx.hdr.magic == NULL)
659 0136599f 2022-10-20 stsp 		return got_error_from_errno("malloc");
660 0136599f 2022-10-20 stsp 	*packidx.hdr.magic = htobe32(GOT_PACKIDX_V2_MAGIC);
661 0136599f 2022-10-20 stsp 	packidx.hdr.version = malloc(sizeof(uint32_t));
662 0136599f 2022-10-20 stsp 	if (packidx.hdr.version == NULL) {
663 0136599f 2022-10-20 stsp 		err = got_error_from_errno("malloc");
664 0136599f 2022-10-20 stsp 		goto done;
665 0136599f 2022-10-20 stsp 	}
666 0136599f 2022-10-20 stsp 	*packidx.hdr.version = htobe32(GOT_PACKIDX_VERSION);
667 0136599f 2022-10-20 stsp 	packidx.hdr.fanout_table = calloc(GOT_PACKIDX_V2_FANOUT_TABLE_ITEMS,
668 0136599f 2022-10-20 stsp 	    sizeof(uint32_t));
669 0136599f 2022-10-20 stsp 	if (packidx.hdr.fanout_table == NULL) {
670 0136599f 2022-10-20 stsp 		err = got_error_from_errno("calloc");
671 0136599f 2022-10-20 stsp 		goto done;
672 0136599f 2022-10-20 stsp 	}
673 0136599f 2022-10-20 stsp 	packidx.hdr.sorted_ids = calloc(nobj,
674 0136599f 2022-10-20 stsp 	    sizeof(struct got_packidx_object_id));
675 0136599f 2022-10-20 stsp 	if (packidx.hdr.sorted_ids == NULL) {
676 0136599f 2022-10-20 stsp 		err = got_error_from_errno("calloc");
677 0136599f 2022-10-20 stsp 		goto done;
678 0136599f 2022-10-20 stsp 	}
679 0136599f 2022-10-20 stsp 	packidx.hdr.crc32 = calloc(nobj, sizeof(uint32_t));
680 0136599f 2022-10-20 stsp 	if (packidx.hdr.crc32 == NULL) {
681 0136599f 2022-10-20 stsp 		err = got_error_from_errno("calloc");
682 0136599f 2022-10-20 stsp 		goto done;
683 0136599f 2022-10-20 stsp 	}
684 0136599f 2022-10-20 stsp 	packidx.hdr.offsets = calloc(nobj, sizeof(uint32_t));
685 0136599f 2022-10-20 stsp 	if (packidx.hdr.offsets == NULL) {
686 0136599f 2022-10-20 stsp 		err = got_error_from_errno("calloc");
687 0136599f 2022-10-20 stsp 		goto done;
688 0136599f 2022-10-20 stsp 	}
689 0136599f 2022-10-20 stsp 	/* Large offsets table is empty for pack files < 2 GB. */
690 0136599f 2022-10-20 stsp 	if (pack->filesize >= GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX) {
691 0136599f 2022-10-20 stsp 		packidx.hdr.large_offsets = calloc(nobj, sizeof(uint64_t));
692 0136599f 2022-10-20 stsp 		if (packidx.hdr.large_offsets == NULL) {
693 0136599f 2022-10-20 stsp 			err = got_error_from_errno("calloc");
694 0136599f 2022-10-20 stsp 			goto done;
695 0136599f 2022-10-20 stsp 		}
696 0136599f 2022-10-20 stsp 	}
697 0136599f 2022-10-20 stsp 
698 0136599f 2022-10-20 stsp 	nvalid = 0;
699 0136599f 2022-10-20 stsp 	nloose = 0;
700 0136599f 2022-10-20 stsp 	objects = calloc(nobj, sizeof(struct got_indexed_object));
701 0136599f 2022-10-20 stsp 	if (objects == NULL)
702 0136599f 2022-10-20 stsp 		return got_error_from_errno("calloc");
703 0136599f 2022-10-20 stsp 
704 0136599f 2022-10-20 stsp 	/*
705 0136599f 2022-10-20 stsp 	 * First pass: locate all objects and identify un-deltified objects.
706 0136599f 2022-10-20 stsp 	 *
707 0136599f 2022-10-20 stsp 	 * When this pass has completed we will know offset, type, size, and
708 0136599f 2022-10-20 stsp 	 * CRC information for all objects in this pack file. We won't know
709 0136599f 2022-10-20 stsp 	 * any of the actual object IDs of deltified objects yet since we
710 0136599f 2022-10-20 stsp 	 * will not yet attempt to combine deltas.
711 0136599f 2022-10-20 stsp 	 */
712 0136599f 2022-10-20 stsp 	pass = 1;
713 0136599f 2022-10-20 stsp 	for (i = 0; i < nobj; i++) {
714 0136599f 2022-10-20 stsp 		/* Don't send too many progress privsep messages. */
715 0136599f 2022-10-20 stsp 		p_indexed = ((i + 1) * 100) / nobj;
716 0136599f 2022-10-20 stsp 		if (p_indexed != last_p_indexed) {
717 0136599f 2022-10-20 stsp 			err = report_progress(nobj, i + 1, nloose, 0,
718 713d6e11 2022-10-20 stsp 			    rl, progress_cb, progress_arg);
719 0136599f 2022-10-20 stsp 			if (err)
720 0136599f 2022-10-20 stsp 				goto done;
721 0136599f 2022-10-20 stsp 			last_p_indexed = p_indexed;
722 0136599f 2022-10-20 stsp 		}
723 0136599f 2022-10-20 stsp 
724 0136599f 2022-10-20 stsp 		obj = &objects[i];
725 0136599f 2022-10-20 stsp 		obj->crc = crc32(0L, NULL, 0);
726 0136599f 2022-10-20 stsp 
727 0136599f 2022-10-20 stsp 		/* Store offset to type+size information for this object. */
728 0136599f 2022-10-20 stsp 		if (pack->map) {
729 0136599f 2022-10-20 stsp 			obj->off = mapoff;
730 0136599f 2022-10-20 stsp 		} else {
731 0136599f 2022-10-20 stsp 			obj->off = lseek(pack->fd, 0, SEEK_CUR);
732 0136599f 2022-10-20 stsp 			if (obj->off == -1) {
733 0136599f 2022-10-20 stsp 				err = got_error_from_errno("lseek");
734 0136599f 2022-10-20 stsp 				goto done;
735 0136599f 2022-10-20 stsp 			}
736 0136599f 2022-10-20 stsp 		}
737 0136599f 2022-10-20 stsp 
738 0136599f 2022-10-20 stsp 		err = read_packed_object(pack, obj, tmpfile, &ctx);
739 0136599f 2022-10-20 stsp 		if (err)
740 0136599f 2022-10-20 stsp 			goto done;
741 0136599f 2022-10-20 stsp 
742 0136599f 2022-10-20 stsp 		if (pack->map) {
743 0136599f 2022-10-20 stsp 			mapoff += obj->tslen + obj->len;
744 0136599f 2022-10-20 stsp 		} else {
745 0136599f 2022-10-20 stsp 			if (lseek(pack->fd, obj->off + obj->tslen + obj->len,
746 0136599f 2022-10-20 stsp 			    SEEK_SET) == -1) {
747 0136599f 2022-10-20 stsp 				err = got_error_from_errno("lseek");
748 0136599f 2022-10-20 stsp 				goto done;
749 0136599f 2022-10-20 stsp 			}
750 0136599f 2022-10-20 stsp 		}
751 0136599f 2022-10-20 stsp 
752 0136599f 2022-10-20 stsp 		if (obj->type == GOT_OBJ_TYPE_BLOB ||
753 0136599f 2022-10-20 stsp 		    obj->type == GOT_OBJ_TYPE_TREE ||
754 0136599f 2022-10-20 stsp 		    obj->type == GOT_OBJ_TYPE_COMMIT ||
755 0136599f 2022-10-20 stsp 		    obj->type == GOT_OBJ_TYPE_TAG) {
756 0136599f 2022-10-20 stsp 			obj->valid = 1;
757 0136599f 2022-10-20 stsp 			nloose++;
758 0136599f 2022-10-20 stsp 		} else {
759 0136599f 2022-10-20 stsp 			if (first_delta_idx == -1)
760 0136599f 2022-10-20 stsp 				first_delta_idx = i;
761 0136599f 2022-10-20 stsp 			if (obj->type == GOT_OBJ_TYPE_REF_DELTA)
762 0136599f 2022-10-20 stsp 				have_ref_deltas = 1;
763 0136599f 2022-10-20 stsp 		}
764 0136599f 2022-10-20 stsp 	}
765 0136599f 2022-10-20 stsp 	nvalid = nloose;
766 0136599f 2022-10-20 stsp 
767 0136599f 2022-10-20 stsp 	/*
768 0136599f 2022-10-20 stsp 	 * Having done a full pass over the pack file and can now
769 0136599f 2022-10-20 stsp 	 * verify its checksum.
770 0136599f 2022-10-20 stsp 	 */
771 ae25a666 2023-02-23 op 	got_hash_final(&ctx, pack_sha1);
772 13b2bc37 2022-10-23 stsp 
773 0136599f 2022-10-20 stsp 	if (memcmp(pack_sha1_expected, pack_sha1, SHA1_DIGEST_LENGTH) != 0) {
774 13b2bc37 2022-10-23 stsp 		err = got_error(GOT_ERR_PACKFILE_CSUM);
775 0136599f 2022-10-20 stsp 		goto done;
776 0136599f 2022-10-20 stsp 	}
777 0136599f 2022-10-20 stsp 
778 0136599f 2022-10-20 stsp 	/* Verify the SHA1 checksum stored at the end of the pack file. */
779 0136599f 2022-10-20 stsp 	if (pack->map) {
780 ad4cc361 2022-10-27 op 		if (pack->filesize > SIZE_MAX) {
781 ad4cc361 2022-10-27 op 			err = got_error_fmt(GOT_ERR_RANGE,
782 ad4cc361 2022-10-27 op 			    "filesize %lld overflows size_t",
783 ad4cc361 2022-10-27 op 			    (long long)pack->filesize);
784 ad4cc361 2022-10-27 op 			goto done;
785 ad4cc361 2022-10-27 op 		}
786 ad4cc361 2022-10-27 op 
787 0136599f 2022-10-20 stsp 		memcpy(pack_sha1_expected, pack->map +
788 0136599f 2022-10-20 stsp 		    pack->filesize - SHA1_DIGEST_LENGTH,
789 0136599f 2022-10-20 stsp 		    SHA1_DIGEST_LENGTH);
790 0136599f 2022-10-20 stsp 	} else {
791 0136599f 2022-10-20 stsp 		ssize_t n;
792 0136599f 2022-10-20 stsp 		if (lseek(pack->fd, -SHA1_DIGEST_LENGTH, SEEK_END) == -1) {
793 0136599f 2022-10-20 stsp 			err = got_error_from_errno("lseek");
794 0136599f 2022-10-20 stsp 			goto done;
795 0136599f 2022-10-20 stsp 		}
796 0136599f 2022-10-20 stsp 		n = read(pack->fd, pack_sha1_expected, SHA1_DIGEST_LENGTH);
797 0136599f 2022-10-20 stsp 		if (n == -1) {
798 0136599f 2022-10-20 stsp 			err = got_error_from_errno("read");
799 0136599f 2022-10-20 stsp 			goto done;
800 0136599f 2022-10-20 stsp 		}
801 0136599f 2022-10-20 stsp 		if (n != SHA1_DIGEST_LENGTH) {
802 0136599f 2022-10-20 stsp 			err = got_error(GOT_ERR_IO);
803 0136599f 2022-10-20 stsp 			goto done;
804 0136599f 2022-10-20 stsp 		}
805 0136599f 2022-10-20 stsp 	}
806 0136599f 2022-10-20 stsp 	if (memcmp(pack_sha1, pack_sha1_expected, SHA1_DIGEST_LENGTH) != 0) {
807 0136599f 2022-10-20 stsp 		err = got_error_msg(GOT_ERR_BAD_PACKFILE,
808 0136599f 2022-10-20 stsp 		    "bad checksum in pack file trailer");
809 0136599f 2022-10-20 stsp 		goto done;
810 0136599f 2022-10-20 stsp 	}
811 0136599f 2022-10-20 stsp 
812 0136599f 2022-10-20 stsp 	if (first_delta_idx == -1)
813 0136599f 2022-10-20 stsp 		first_delta_idx = 0;
814 0136599f 2022-10-20 stsp 
815 0136599f 2022-10-20 stsp 	/* In order to resolve ref deltas we need an in-progress pack index. */
816 0136599f 2022-10-20 stsp 	if (have_ref_deltas)
817 0136599f 2022-10-20 stsp 		make_packidx(&packidx, nobj, objects);
818 0136599f 2022-10-20 stsp 
819 0136599f 2022-10-20 stsp 	/*
820 0136599f 2022-10-20 stsp 	 * Second pass: We can now resolve deltas to compute the IDs of
821 0136599f 2022-10-20 stsp 	 * objects which appear in deltified form. Because deltas can be
822 0136599f 2022-10-20 stsp 	 * chained this pass may require a couple of iterations until all
823 0136599f 2022-10-20 stsp 	 * IDs of deltified objects have been discovered.
824 0136599f 2022-10-20 stsp 	 */
825 0136599f 2022-10-20 stsp 	pass++;
826 0136599f 2022-10-20 stsp 	while (nvalid != nobj) {
827 0136599f 2022-10-20 stsp 		int n = 0;
828 0136599f 2022-10-20 stsp 		/*
829 0136599f 2022-10-20 stsp 		 * This loop will only run once unless the pack file
830 0136599f 2022-10-20 stsp 		 * contains ref deltas which refer to objects located
831 0136599f 2022-10-20 stsp 		 * later in the pack file, which is unusual.
832 0136599f 2022-10-20 stsp 		 * Offset deltas can always be resolved in one pass
833 0136599f 2022-10-20 stsp 		 * unless the packfile is corrupt.
834 0136599f 2022-10-20 stsp 		 */
835 0136599f 2022-10-20 stsp 		for (i = first_delta_idx; i < nobj; i++) {
836 0136599f 2022-10-20 stsp 			obj = &objects[i];
837 0136599f 2022-10-20 stsp 			if (obj->type != GOT_OBJ_TYPE_REF_DELTA &&
838 0136599f 2022-10-20 stsp 			    obj->type != GOT_OBJ_TYPE_OFFSET_DELTA)
839 0136599f 2022-10-20 stsp 				continue;
840 0136599f 2022-10-20 stsp 
841 0136599f 2022-10-20 stsp 			if (obj->valid)
842 0136599f 2022-10-20 stsp 				continue;
843 0136599f 2022-10-20 stsp 
844 0136599f 2022-10-20 stsp 			if (pack->map == NULL && lseek(pack->fd,
845 0136599f 2022-10-20 stsp 			    obj->off + obj->tslen, SEEK_SET) == -1) {
846 0136599f 2022-10-20 stsp 				err = got_error_from_errno("lseek");
847 0136599f 2022-10-20 stsp 				goto done;
848 0136599f 2022-10-20 stsp 			}
849 0136599f 2022-10-20 stsp 
850 0136599f 2022-10-20 stsp 			err = resolve_deltified_object(pack, &packidx, obj,
851 0136599f 2022-10-20 stsp 			    tmpfile, delta_base_file, delta_accum_file);
852 0136599f 2022-10-20 stsp 			if (err) {
853 0136599f 2022-10-20 stsp 				if (err->code != GOT_ERR_NO_OBJ)
854 0136599f 2022-10-20 stsp 					goto done;
855 0136599f 2022-10-20 stsp 				/*
856 0136599f 2022-10-20 stsp 				 * We cannot resolve this object yet because
857 0136599f 2022-10-20 stsp 				 * a delta base is unknown. Try again later.
858 0136599f 2022-10-20 stsp 				 */
859 0136599f 2022-10-20 stsp 				continue;
860 0136599f 2022-10-20 stsp 			}
861 0136599f 2022-10-20 stsp 
862 0136599f 2022-10-20 stsp 			obj->valid = 1;
863 0136599f 2022-10-20 stsp 			n++;
864 0136599f 2022-10-20 stsp 			if (have_ref_deltas)
865 0136599f 2022-10-20 stsp 				update_packidx(&packidx, nobj, obj);
866 0136599f 2022-10-20 stsp 			/* Don't send too many progress privsep messages. */
867 0136599f 2022-10-20 stsp 			p_resolved = ((nresolved + n) * 100) / nobj;
868 0136599f 2022-10-20 stsp 			if (p_resolved != last_p_resolved) {
869 0136599f 2022-10-20 stsp 				err = report_progress(nobj, nobj,
870 713d6e11 2022-10-20 stsp 				    nloose, nresolved + n, rl,
871 0136599f 2022-10-20 stsp 				    progress_cb, progress_arg);
872 0136599f 2022-10-20 stsp 				if (err)
873 0136599f 2022-10-20 stsp 					goto done;
874 0136599f 2022-10-20 stsp 				last_p_resolved = p_resolved;
875 0136599f 2022-10-20 stsp 			}
876 0136599f 2022-10-20 stsp 
877 0136599f 2022-10-20 stsp 		}
878 0136599f 2022-10-20 stsp 		if (pass++ > 3 && n == 0) {
879 0136599f 2022-10-20 stsp 			err = got_error_msg(GOT_ERR_BAD_PACKFILE,
880 0136599f 2022-10-20 stsp 			    "could not resolve any of deltas; packfile could "
881 0136599f 2022-10-20 stsp 			    "be corrupt");
882 0136599f 2022-10-20 stsp 			goto done;
883 0136599f 2022-10-20 stsp 		}
884 0136599f 2022-10-20 stsp 		nresolved += n;
885 cf534ab8 2023-01-17 stsp 		nvalid += n;
886 0136599f 2022-10-20 stsp 	}
887 0136599f 2022-10-20 stsp 
888 0136599f 2022-10-20 stsp 	if (nloose + nresolved != nobj) {
889 0136599f 2022-10-20 stsp 		static char msg[64];
890 0136599f 2022-10-20 stsp 		snprintf(msg, sizeof(msg), "discovered only %d of %d objects",
891 0136599f 2022-10-20 stsp 		    nloose + nresolved, nobj);
892 0136599f 2022-10-20 stsp 		err = got_error_msg(GOT_ERR_BAD_PACKFILE, msg);
893 0136599f 2022-10-20 stsp 		goto done;
894 0136599f 2022-10-20 stsp 	}
895 0136599f 2022-10-20 stsp 
896 0136599f 2022-10-20 stsp 	err = report_progress(nobj, nobj, nloose, nresolved, NULL,
897 0136599f 2022-10-20 stsp 	    progress_cb, progress_arg);
898 0136599f 2022-10-20 stsp 	if (err)
899 0136599f 2022-10-20 stsp 		goto done;
900 0136599f 2022-10-20 stsp 
901 0136599f 2022-10-20 stsp 	make_packidx(&packidx, nobj, objects);
902 0136599f 2022-10-20 stsp 
903 0136599f 2022-10-20 stsp 	free(objects);
904 0136599f 2022-10-20 stsp 	objects = NULL;
905 0136599f 2022-10-20 stsp 
906 ae25a666 2023-02-23 op 	got_hash_init(&ctx, GOT_HASH_SHA1);
907 0136599f 2022-10-20 stsp 	putbe32(buf, GOT_PACKIDX_V2_MAGIC);
908 0136599f 2022-10-20 stsp 	putbe32(buf + 4, GOT_PACKIDX_VERSION);
909 13b2bc37 2022-10-23 stsp 	err = got_pack_hwrite(idxfd, buf, 8, &ctx);
910 0136599f 2022-10-20 stsp 	if (err)
911 0136599f 2022-10-20 stsp 		goto done;
912 13b2bc37 2022-10-23 stsp 	err = got_pack_hwrite(idxfd, packidx.hdr.fanout_table,
913 0136599f 2022-10-20 stsp 	    GOT_PACKIDX_V2_FANOUT_TABLE_ITEMS * sizeof(uint32_t), &ctx);
914 0136599f 2022-10-20 stsp 	if (err)
915 0136599f 2022-10-20 stsp 		goto done;
916 13b2bc37 2022-10-23 stsp 	err = got_pack_hwrite(idxfd, packidx.hdr.sorted_ids,
917 0136599f 2022-10-20 stsp 	    nobj * SHA1_DIGEST_LENGTH, &ctx);
918 0136599f 2022-10-20 stsp 	if (err)
919 0136599f 2022-10-20 stsp 		goto done;
920 13b2bc37 2022-10-23 stsp 	err = got_pack_hwrite(idxfd, packidx.hdr.crc32,
921 13b2bc37 2022-10-23 stsp 	    nobj * sizeof(uint32_t), &ctx);
922 0136599f 2022-10-20 stsp 	if (err)
923 0136599f 2022-10-20 stsp 		goto done;
924 13b2bc37 2022-10-23 stsp 	err = got_pack_hwrite(idxfd, packidx.hdr.offsets,
925 13b2bc37 2022-10-23 stsp 	    nobj * sizeof(uint32_t), &ctx);
926 0136599f 2022-10-20 stsp 	if (err)
927 0136599f 2022-10-20 stsp 		goto done;
928 0136599f 2022-10-20 stsp 	if (packidx.nlargeobj > 0) {
929 13b2bc37 2022-10-23 stsp 		err = got_pack_hwrite(idxfd, packidx.hdr.large_offsets,
930 0136599f 2022-10-20 stsp 		    packidx.nlargeobj * sizeof(uint64_t), &ctx);
931 0136599f 2022-10-20 stsp 		if (err)
932 0136599f 2022-10-20 stsp 			goto done;
933 0136599f 2022-10-20 stsp 	}
934 13b2bc37 2022-10-23 stsp 	err = got_pack_hwrite(idxfd, pack_sha1, SHA1_DIGEST_LENGTH, &ctx);
935 0136599f 2022-10-20 stsp 	if (err)
936 0136599f 2022-10-20 stsp 		goto done;
937 0136599f 2022-10-20 stsp 
938 ae25a666 2023-02-23 op 	got_hash_final(&ctx, packidx_hash);
939 0136599f 2022-10-20 stsp 	w = write(idxfd, packidx_hash, sizeof(packidx_hash));
940 0136599f 2022-10-20 stsp 	if (w == -1) {
941 0136599f 2022-10-20 stsp 		err = got_error_from_errno("write");
942 0136599f 2022-10-20 stsp 		goto done;
943 0136599f 2022-10-20 stsp 	}
944 0136599f 2022-10-20 stsp 	if (w != sizeof(packidx_hash)) {
945 0136599f 2022-10-20 stsp 		err = got_error(GOT_ERR_IO);
946 0136599f 2022-10-20 stsp 		goto done;
947 0136599f 2022-10-20 stsp 	}
948 0136599f 2022-10-20 stsp done:
949 0136599f 2022-10-20 stsp 	free(objects);
950 0136599f 2022-10-20 stsp 	free(packidx.hdr.magic);
951 0136599f 2022-10-20 stsp 	free(packidx.hdr.version);
952 0136599f 2022-10-20 stsp 	free(packidx.hdr.fanout_table);
953 0136599f 2022-10-20 stsp 	free(packidx.hdr.sorted_ids);
954 0136599f 2022-10-20 stsp 	free(packidx.hdr.offsets);
955 0136599f 2022-10-20 stsp 	free(packidx.hdr.large_offsets);
956 0136599f 2022-10-20 stsp 	return err;
957 0136599f 2022-10-20 stsp }