2 5aa81393 2020-01-06 stsp * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org>
4 0a0a3048 2018-01-10 stsp * Permission to use, copy, modify, and distribute this software for any
5 0a0a3048 2018-01-10 stsp * purpose with or without fee is hereby granted, provided that the above
6 0a0a3048 2018-01-10 stsp * copyright notice and this permission notice appear in all copies.
8 0a0a3048 2018-01-10 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 0a0a3048 2018-01-10 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 0a0a3048 2018-01-10 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 0a0a3048 2018-01-10 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 0a0a3048 2018-01-10 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 0a0a3048 2018-01-10 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 0a0a3048 2018-01-10 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 a1fd68d8 2018-01-12 stsp #include <sys/types.h>
18 0a0a3048 2018-01-10 stsp #include <sys/stat.h>
19 876c234b 2018-09-10 stsp #include <sys/uio.h>
20 57b35b75 2018-06-22 stsp #include <sys/mman.h>
22 7e656b93 2018-03-17 stsp #include <fcntl.h>
23 a1fd68d8 2018-01-12 stsp #include <errno.h>
24 0a0a3048 2018-01-10 stsp #include <stdio.h>
25 a1fd68d8 2018-01-12 stsp #include <stdint.h>
26 0a0a3048 2018-01-10 stsp #include <stdlib.h>
27 0a0a3048 2018-01-10 stsp #include <string.h>
28 0a0a3048 2018-01-10 stsp #include <limits.h>
29 81a12da5 2020-09-09 naddy #include <unistd.h>
30 a1fd68d8 2018-01-12 stsp #include <zlib.h>
32 0a0a3048 2018-01-10 stsp #include "got_error.h"
33 a1fd68d8 2018-01-12 stsp #include "got_object.h"
34 324d37e7 2019-05-11 stsp #include "got_path.h"
36 718b3ab0 2018-03-17 stsp #include "got_lib_sha1.h"
37 718b3ab0 2018-03-17 stsp #include "got_lib_delta.h"
38 ab2f42e7 2019-11-10 stsp #include "got_lib_delta_cache.h"
39 63581804 2018-07-09 stsp #include "got_lib_inflate.h"
40 718b3ab0 2018-03-17 stsp #include "got_lib_object.h"
41 dd88155e 2019-06-29 stsp #include "got_lib_object_parse.h"
42 876c234b 2018-09-10 stsp #include "got_lib_privsep.h"
43 15a94983 2018-12-23 stsp #include "got_lib_pack.h"
45 79b11c62 2018-03-09 stsp #ifndef nitems
46 79b11c62 2018-03-09 stsp #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
50 a1fd68d8 2018-01-12 stsp #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
53 0a0a3048 2018-01-10 stsp static const struct got_error *
54 0a0a3048 2018-01-10 stsp verify_fanout_table(uint32_t *fanout_table)
58 0a0a3048 2018-01-10 stsp for (i = 0; i < 0xff - 1; i++) {
59 a1fd68d8 2018-01-12 stsp if (be32toh(fanout_table[i]) > be32toh(fanout_table[i + 1]))
60 0a0a3048 2018-01-10 stsp return got_error(GOT_ERR_BAD_PACKIDX);
63 0a0a3048 2018-01-10 stsp return NULL;
66 1510f469 2018-09-09 stsp const struct got_error *
67 c3564dfa 2021-07-15 stsp got_packidx_init_hdr(struct got_packidx *p, int verify, off_t packfile_size)
69 0a0a3048 2018-01-10 stsp const struct got_error *err = NULL;
70 817c5a18 2018-09-09 stsp struct got_packidx_v2_hdr *h;
71 0ebaf008 2018-01-10 stsp SHA1_CTX ctx;
72 0ebaf008 2018-01-10 stsp uint8_t sha1[SHA1_DIGEST_LENGTH];
73 817c5a18 2018-09-09 stsp size_t nobj, len_fanout, len_ids, offset, remain;
77 0ebaf008 2018-01-10 stsp SHA1Init(&ctx);
79 57b35b75 2018-06-22 stsp h = &p->hdr;
81 57b35b75 2018-06-22 stsp remain = p->len;
83 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->magic)) {
84 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
88 fc79a48d 2018-07-09 stsp h->magic = (uint32_t *)(p->map + offset);
90 fc79a48d 2018-07-09 stsp h->magic = malloc(sizeof(*h->magic));
91 fc79a48d 2018-07-09 stsp if (h->magic == NULL) {
92 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
95 fc79a48d 2018-07-09 stsp n = read(p->fd, h->magic, sizeof(*h->magic));
96 b1317e77 2019-09-22 stsp if (n < 0) {
97 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
99 b1317e77 2019-09-22 stsp } else if (n != sizeof(*h->magic)) {
100 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
104 ac62b712 2021-03-30 stsp if (*h->magic != htobe32(GOT_PACKIDX_V2_MAGIC)) {
105 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
108 57b35b75 2018-06-22 stsp offset += sizeof(*h->magic);
109 57b35b75 2018-06-22 stsp remain -= sizeof(*h->magic);
111 0cb74cf4 2018-07-08 stsp if (verify)
112 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->magic, sizeof(*h->magic));
114 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->version)) {
115 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
118 fc79a48d 2018-07-09 stsp if (p->map)
119 fc79a48d 2018-07-09 stsp h->version = (uint32_t *)(p->map + offset);
121 fc79a48d 2018-07-09 stsp h->version = malloc(sizeof(*h->version));
122 fc79a48d 2018-07-09 stsp if (h->version == NULL) {
123 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
126 fc79a48d 2018-07-09 stsp n = read(p->fd, h->version, sizeof(*h->version));
127 c6368c2e 2019-10-11 stsp if (n < 0) {
128 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
130 c6368c2e 2019-10-11 stsp } else if (n != sizeof(*h->version)) {
131 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
135 ac62b712 2021-03-30 stsp if (*h->version != htobe32(GOT_PACKIDX_VERSION)) {
136 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
139 57b35b75 2018-06-22 stsp offset += sizeof(*h->version);
140 57b35b75 2018-06-22 stsp remain -= sizeof(*h->version);
142 0cb74cf4 2018-07-08 stsp if (verify)
143 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->version, sizeof(*h->version));
145 57b35b75 2018-06-22 stsp len_fanout =
146 57b35b75 2018-06-22 stsp sizeof(*h->fanout_table) * GOT_PACKIDX_V2_FANOUT_TABLE_ITEMS;
147 57b35b75 2018-06-22 stsp if (remain < len_fanout) {
148 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
151 fc79a48d 2018-07-09 stsp if (p->map)
152 fc79a48d 2018-07-09 stsp h->fanout_table = (uint32_t *)(p->map + offset);
154 fc79a48d 2018-07-09 stsp h->fanout_table = malloc(len_fanout);
155 fc79a48d 2018-07-09 stsp if (h->fanout_table == NULL) {
156 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
159 fc79a48d 2018-07-09 stsp n = read(p->fd, h->fanout_table, len_fanout);
160 c6368c2e 2019-10-11 stsp if (n < 0) {
161 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
163 c6368c2e 2019-10-11 stsp } else if (n != len_fanout) {
164 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
168 c8262310 2018-06-04 stsp err = verify_fanout_table(h->fanout_table);
171 0cb74cf4 2018-07-08 stsp if (verify)
172 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->fanout_table, len_fanout);
173 57b35b75 2018-06-22 stsp offset += len_fanout;
174 57b35b75 2018-06-22 stsp remain -= len_fanout;
176 78fb0967 2020-09-09 naddy nobj = be32toh(h->fanout_table[0xff]);
177 57b35b75 2018-06-22 stsp len_ids = nobj * sizeof(*h->sorted_ids);
178 57b35b75 2018-06-22 stsp if (len_ids <= nobj || len_ids > remain) {
179 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
182 fc79a48d 2018-07-09 stsp if (p->map)
183 fc79a48d 2018-07-09 stsp h->sorted_ids =
184 fc79a48d 2018-07-09 stsp (struct got_packidx_object_id *)((uint8_t*)(p->map + offset));
186 fc79a48d 2018-07-09 stsp h->sorted_ids = malloc(len_ids);
187 fc79a48d 2018-07-09 stsp if (h->sorted_ids == NULL) {
188 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
191 fc79a48d 2018-07-09 stsp n = read(p->fd, h->sorted_ids, len_ids);
193 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
194 faaa1c0f 2018-09-15 stsp else if (n != len_ids) {
195 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
199 0cb74cf4 2018-07-08 stsp if (verify)
200 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->sorted_ids, len_ids);
201 57b35b75 2018-06-22 stsp offset += len_ids;
202 57b35b75 2018-06-22 stsp remain -= len_ids;
204 57b35b75 2018-06-22 stsp if (remain < nobj * sizeof(*h->crc32)) {
205 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
208 fc79a48d 2018-07-09 stsp if (p->map)
209 fc79a48d 2018-07-09 stsp h->crc32 = (uint32_t *)((uint8_t*)(p->map + offset));
211 fc79a48d 2018-07-09 stsp h->crc32 = malloc(nobj * sizeof(*h->crc32));
212 fc79a48d 2018-07-09 stsp if (h->crc32 == NULL) {
213 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
216 fc79a48d 2018-07-09 stsp n = read(p->fd, h->crc32, nobj * sizeof(*h->crc32));
218 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
219 faaa1c0f 2018-09-15 stsp else if (n != nobj * sizeof(*h->crc32)) {
220 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
224 0cb74cf4 2018-07-08 stsp if (verify)
225 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->crc32, nobj * sizeof(*h->crc32));
226 57b35b75 2018-06-22 stsp remain -= nobj * sizeof(*h->crc32);
227 57b35b75 2018-06-22 stsp offset += nobj * sizeof(*h->crc32);
229 57b35b75 2018-06-22 stsp if (remain < nobj * sizeof(*h->offsets)) {
230 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
233 fc79a48d 2018-07-09 stsp if (p->map)
234 fc79a48d 2018-07-09 stsp h->offsets = (uint32_t *)((uint8_t*)(p->map + offset));
236 fc79a48d 2018-07-09 stsp h->offsets = malloc(nobj * sizeof(*h->offsets));
237 fc79a48d 2018-07-09 stsp if (h->offsets == NULL) {
238 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
241 fc79a48d 2018-07-09 stsp n = read(p->fd, h->offsets, nobj * sizeof(*h->offsets));
243 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
244 faaa1c0f 2018-09-15 stsp else if (n != nobj * sizeof(*h->offsets)) {
245 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
249 0cb74cf4 2018-07-08 stsp if (verify)
250 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->offsets,
251 0cb74cf4 2018-07-08 stsp nobj * sizeof(*h->offsets));
252 57b35b75 2018-06-22 stsp remain -= nobj * sizeof(*h->offsets);
253 57b35b75 2018-06-22 stsp offset += nobj * sizeof(*h->offsets);
255 0a0a3048 2018-01-10 stsp /* Large file offsets are contained only in files > 2GB. */
256 c3564dfa 2021-07-15 stsp if (verify || packfile_size > 0x7fffffff) {
257 c3564dfa 2021-07-15 stsp for (i = 0; i < nobj; i++) {
258 c3564dfa 2021-07-15 stsp uint32_t o = h->offsets[i];
259 c3564dfa 2021-07-15 stsp if (o & htobe32(GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX))
260 c3564dfa 2021-07-15 stsp p->nlargeobj++;
263 5e6be232 2019-11-08 stsp if (p->nlargeobj == 0)
264 0a0a3048 2018-01-10 stsp goto checksum;
265 c3564dfa 2021-07-15 stsp else if (packfile_size <= 0x7fffffff) {
266 c3564dfa 2021-07-15 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
270 5e6be232 2019-11-08 stsp if (remain < p->nlargeobj * sizeof(*h->large_offsets)) {
271 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
274 fc79a48d 2018-07-09 stsp if (p->map)
275 fc79a48d 2018-07-09 stsp h->large_offsets = (uint64_t *)((uint8_t*)(p->map + offset));
277 5e6be232 2019-11-08 stsp h->large_offsets = malloc(p->nlargeobj *
278 5e6be232 2019-11-08 stsp sizeof(*h->large_offsets));
279 de30857e 2019-08-23 stsp if (h->large_offsets == NULL) {
280 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
283 fc79a48d 2018-07-09 stsp n = read(p->fd, h->large_offsets,
284 5e6be232 2019-11-08 stsp p->nlargeobj * sizeof(*h->large_offsets));
286 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
287 5e6be232 2019-11-08 stsp else if (n != p->nlargeobj * sizeof(*h->large_offsets)) {
288 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
292 0cb74cf4 2018-07-08 stsp if (verify)
293 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t*)h->large_offsets,
294 5e6be232 2019-11-08 stsp p->nlargeobj * sizeof(*h->large_offsets));
295 5e6be232 2019-11-08 stsp remain -= p->nlargeobj * sizeof(*h->large_offsets);
296 5e6be232 2019-11-08 stsp offset += p->nlargeobj * sizeof(*h->large_offsets);
299 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->trailer)) {
300 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
303 fc79a48d 2018-07-09 stsp if (p->map)
304 fc79a48d 2018-07-09 stsp h->trailer =
305 fc79a48d 2018-07-09 stsp (struct got_packidx_trailer *)((uint8_t*)(p->map + offset));
307 fc79a48d 2018-07-09 stsp h->trailer = malloc(sizeof(*h->trailer));
308 fc79a48d 2018-07-09 stsp if (h->trailer == NULL) {
309 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
312 fc79a48d 2018-07-09 stsp n = read(p->fd, h->trailer, sizeof(*h->trailer));
314 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
315 faaa1c0f 2018-09-15 stsp else if (n != sizeof(*h->trailer)) {
316 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
320 0cb74cf4 2018-07-08 stsp if (verify) {
321 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, h->trailer->packfile_sha1, SHA1_DIGEST_LENGTH);
322 0cb74cf4 2018-07-08 stsp SHA1Final(sha1, &ctx);
323 0cb74cf4 2018-07-08 stsp if (memcmp(h->trailer->packidx_sha1, sha1,
324 0cb74cf4 2018-07-08 stsp SHA1_DIGEST_LENGTH) != 0)
325 0cb74cf4 2018-07-08 stsp err = got_error(GOT_ERR_PACKIDX_CSUM);
328 817c5a18 2018-09-09 stsp return err;
331 817c5a18 2018-09-09 stsp const struct got_error *
332 6d5a9006 2020-12-16 yzhong got_packidx_open(struct got_packidx **packidx,
333 6d5a9006 2020-12-16 yzhong int dir_fd, const char *relpath, int verify)
335 817c5a18 2018-09-09 stsp const struct got_error *err = NULL;
336 1124fe40 2021-07-07 stsp struct got_packidx *p = NULL;
337 1124fe40 2021-07-07 stsp char *pack_relpath;
338 c3564dfa 2021-07-15 stsp struct stat idx_sb, pack_sb;
340 817c5a18 2018-09-09 stsp *packidx = NULL;
342 1124fe40 2021-07-07 stsp err = got_packidx_get_packfile_path(&pack_relpath, relpath);
344 1124fe40 2021-07-07 stsp return err;
347 1124fe40 2021-07-07 stsp * Ensure that a corresponding pack file exists.
348 1124fe40 2021-07-07 stsp * Some Git repositories have this problem. Git seems to ignore
349 1124fe40 2021-07-07 stsp * the existence of lonely pack index files but we do not.
351 c3564dfa 2021-07-15 stsp if (fstatat(dir_fd, pack_relpath, &pack_sb, 0) == -1) {
352 1124fe40 2021-07-07 stsp if (errno == ENOENT) {
353 1124fe40 2021-07-07 stsp err = got_error_fmt(GOT_ERR_LONELY_PACKIDX,
354 1124fe40 2021-07-07 stsp "%s", relpath);
356 1124fe40 2021-07-07 stsp err = got_error_from_errno2("fstatat", pack_relpath);
360 817c5a18 2018-09-09 stsp p = calloc(1, sizeof(*p));
361 1124fe40 2021-07-07 stsp if (p == NULL) {
362 1124fe40 2021-07-07 stsp err = got_error_from_errno("calloc");
366 fc63f50d 2021-12-31 thomas p->fd = openat(dir_fd, relpath, O_RDONLY | O_NOFOLLOW | O_CLOEXEC);
367 6772cf22 2019-08-28 hiltjo if (p->fd == -1) {
368 6d5a9006 2020-12-16 yzhong err = got_error_from_errno2("openat", relpath);
372 c3564dfa 2021-07-15 stsp if (fstat(p->fd, &idx_sb) != 0) {
373 6d5a9006 2020-12-16 yzhong err = got_error_from_errno2("fstat", relpath);
376 c3564dfa 2021-07-15 stsp p->len = idx_sb.st_size;
377 817c5a18 2018-09-09 stsp if (p->len < sizeof(p->hdr)) {
378 817c5a18 2018-09-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
382 6d5a9006 2020-12-16 yzhong p->path_packidx = strdup(relpath);
383 817c5a18 2018-09-09 stsp if (p->path_packidx == NULL) {
384 638f9024 2019-05-13 stsp err = got_error_from_errno("strdup");
388 817c5a18 2018-09-09 stsp #ifndef GOT_PACK_NO_MMAP
389 817c5a18 2018-09-09 stsp p->map = mmap(NULL, p->len, PROT_READ, MAP_PRIVATE, p->fd, 0);
390 3a11398b 2019-02-21 stsp if (p->map == MAP_FAILED) {
391 3a11398b 2019-02-21 stsp if (errno != ENOMEM) {
392 638f9024 2019-05-13 stsp err = got_error_from_errno("mmap");
395 817c5a18 2018-09-09 stsp p->map = NULL; /* fall back to read(2) */
399 c3564dfa 2021-07-15 stsp err = got_packidx_init_hdr(p, verify, pack_sb.st_size);
403 1124fe40 2021-07-07 stsp got_packidx_close(p);
405 0a0a3048 2018-01-10 stsp *packidx = p;
406 1124fe40 2021-07-07 stsp free(pack_relpath);
407 0a0a3048 2018-01-10 stsp return err;
410 57b35b75 2018-06-22 stsp const struct got_error *
411 6fd11751 2018-06-04 stsp got_packidx_close(struct got_packidx *packidx)
413 57b35b75 2018-06-22 stsp const struct got_error *err = NULL;
415 6fd11751 2018-06-04 stsp free(packidx->path_packidx);
416 fc79a48d 2018-07-09 stsp if (packidx->map) {
417 57b35b75 2018-06-22 stsp if (munmap(packidx->map, packidx->len) == -1)
418 638f9024 2019-05-13 stsp err = got_error_from_errno("munmap");
420 fc79a48d 2018-07-09 stsp free(packidx->hdr.magic);
421 fc79a48d 2018-07-09 stsp free(packidx->hdr.version);
422 fc79a48d 2018-07-09 stsp free(packidx->hdr.fanout_table);
423 fc79a48d 2018-07-09 stsp free(packidx->hdr.sorted_ids);
424 fc79a48d 2018-07-09 stsp free(packidx->hdr.crc32);
425 fc79a48d 2018-07-09 stsp free(packidx->hdr.offsets);
426 fc79a48d 2018-07-09 stsp free(packidx->hdr.large_offsets);
427 fc79a48d 2018-07-09 stsp free(packidx->hdr.trailer);
429 08578a35 2021-01-22 stsp if (close(packidx->fd) == -1 && err == NULL)
430 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
431 f9c2e8e5 2022-02-13 thomas free(packidx->sorted_offsets);
432 f9c2e8e5 2022-02-13 thomas free(packidx->sorted_large_offsets);
433 0a0a3048 2018-01-10 stsp free(packidx);
435 57b35b75 2018-06-22 stsp return err;
438 509c9973 2021-04-10 stsp const struct got_error *
439 aea75d87 2021-07-06 stsp got_packidx_get_packfile_path(char **path_packfile, const char *path_packidx)
441 509c9973 2021-04-10 stsp size_t size;
443 509c9973 2021-04-10 stsp /* Packfile path contains ".pack" instead of ".idx", so add one byte. */
444 aea75d87 2021-07-06 stsp size = strlen(path_packidx) + 2;
445 509c9973 2021-04-10 stsp if (size < GOT_PACKFILE_NAMELEN + 1)
446 aea75d87 2021-07-06 stsp return got_error_path(path_packidx, GOT_ERR_BAD_PATH);
448 509c9973 2021-04-10 stsp *path_packfile = malloc(size);
449 509c9973 2021-04-10 stsp if (*path_packfile == NULL)
450 509c9973 2021-04-10 stsp return got_error_from_errno("malloc");
452 509c9973 2021-04-10 stsp /* Copy up to and excluding ".idx". */
453 aea75d87 2021-07-06 stsp if (strlcpy(*path_packfile, path_packidx,
454 509c9973 2021-04-10 stsp size - strlen(GOT_PACKIDX_SUFFIX) - 1) >= size)
455 509c9973 2021-04-10 stsp return got_error(GOT_ERR_NO_SPACE);
457 509c9973 2021-04-10 stsp if (strlcat(*path_packfile, GOT_PACKFILE_SUFFIX, size) >= size)
458 509c9973 2021-04-10 stsp return got_error(GOT_ERR_NO_SPACE);
460 509c9973 2021-04-10 stsp return NULL;
464 02828bfd 2021-06-22 stsp got_packidx_get_object_offset(struct got_packidx *packidx, int idx)
466 78fb0967 2020-09-09 naddy uint32_t offset = be32toh(packidx->hdr.offsets[idx]);
467 a1fd68d8 2018-01-12 stsp if (offset & GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX) {
468 a1fd68d8 2018-01-12 stsp uint64_t loffset;
469 a1fd68d8 2018-01-12 stsp idx = offset & GOT_PACKIDX_OFFSET_VAL_MASK;
470 5e6be232 2019-11-08 stsp if (idx < 0 || idx >= packidx->nlargeobj ||
471 6fd11751 2018-06-04 stsp packidx->hdr.large_offsets == NULL)
473 78fb0967 2020-09-09 naddy loffset = be64toh(packidx->hdr.large_offsets[idx]);
474 a1fd68d8 2018-01-12 stsp return (loffset > INT64_MAX ? -1 : (off_t)loffset);
476 a1fd68d8 2018-01-12 stsp return (off_t)(offset & GOT_PACKIDX_OFFSET_VAL_MASK);
480 48b4f239 2021-12-31 thomas got_packidx_get_object_idx(struct got_packidx *packidx,
481 48b4f239 2021-12-31 thomas struct got_object_id *id)
483 00927983 2020-04-19 stsp u_int8_t id0 = id->sha1[0];
484 78fb0967 2020-09-09 naddy uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
485 40aeb19c 2018-06-22 stsp int left = 0, right = totobj - 1;
487 a1fd68d8 2018-01-12 stsp if (id0 > 0)
488 78fb0967 2020-09-09 naddy left = be32toh(packidx->hdr.fanout_table[id0 - 1]);
490 40aeb19c 2018-06-22 stsp while (left <= right) {
491 57b35b75 2018-06-22 stsp struct got_packidx_object_id *oid;
492 40aeb19c 2018-06-22 stsp int i, cmp;
494 40aeb19c 2018-06-22 stsp i = ((left + right) / 2);
495 40aeb19c 2018-06-22 stsp oid = &packidx->hdr.sorted_ids[i];
496 00927983 2020-04-19 stsp cmp = memcmp(id->sha1, oid->sha1, SHA1_DIGEST_LENGTH);
497 16dcbf91 2018-04-01 stsp if (cmp == 0)
499 40aeb19c 2018-06-22 stsp else if (cmp > 0)
500 40aeb19c 2018-06-22 stsp left = i + 1;
501 40aeb19c 2018-06-22 stsp else if (cmp < 0)
502 40aeb19c 2018-06-22 stsp right = i - 1;
508 f9c2e8e5 2022-02-13 thomas static int
509 f9c2e8e5 2022-02-13 thomas offset_cmp(const void *pa, const void *pb)
511 f9c2e8e5 2022-02-13 thomas const struct got_pack_offset_index *a, *b;
513 f9c2e8e5 2022-02-13 thomas a = (const struct got_pack_offset_index *)pa;
514 f9c2e8e5 2022-02-13 thomas b = (const struct got_pack_offset_index *)pb;
516 f9c2e8e5 2022-02-13 thomas if (a->offset < b->offset)
517 f9c2e8e5 2022-02-13 thomas return -1;
518 f9c2e8e5 2022-02-13 thomas else if (a->offset > b->offset)
519 f9c2e8e5 2022-02-13 thomas return 1;
521 f9c2e8e5 2022-02-13 thomas return 0;
524 f9c2e8e5 2022-02-13 thomas static int
525 f9c2e8e5 2022-02-13 thomas large_offset_cmp(const void *pa, const void *pb)
527 f9c2e8e5 2022-02-13 thomas const struct got_pack_large_offset_index *a, *b;
529 f9c2e8e5 2022-02-13 thomas a = (const struct got_pack_large_offset_index *)pa;
530 f9c2e8e5 2022-02-13 thomas b = (const struct got_pack_large_offset_index *)pb;
532 f9c2e8e5 2022-02-13 thomas if (a->offset < b->offset)
533 f9c2e8e5 2022-02-13 thomas return -1;
534 f9c2e8e5 2022-02-13 thomas else if (a->offset > b->offset)
535 f9c2e8e5 2022-02-13 thomas return 1;
537 f9c2e8e5 2022-02-13 thomas return 0;
540 f9c2e8e5 2022-02-13 thomas static const struct got_error *
541 f9c2e8e5 2022-02-13 thomas build_offset_index(struct got_packidx *p)
543 f9c2e8e5 2022-02-13 thomas uint32_t nobj = be32toh(p->hdr.fanout_table[0xff]);
544 f9c2e8e5 2022-02-13 thomas unsigned int i, j, k;
546 f9c2e8e5 2022-02-13 thomas p->sorted_offsets = calloc(nobj - p->nlargeobj,
547 f9c2e8e5 2022-02-13 thomas sizeof(p->sorted_offsets[0]));
548 f9c2e8e5 2022-02-13 thomas if (p->sorted_offsets == NULL)
549 f9c2e8e5 2022-02-13 thomas return got_error_from_errno("calloc");
551 f9c2e8e5 2022-02-13 thomas if (p->nlargeobj > 0) {
552 f9c2e8e5 2022-02-13 thomas p->sorted_large_offsets = calloc(p->nlargeobj,
553 f9c2e8e5 2022-02-13 thomas sizeof(p->sorted_large_offsets[0]));
554 f9c2e8e5 2022-02-13 thomas if (p->sorted_large_offsets == NULL)
555 f9c2e8e5 2022-02-13 thomas return got_error_from_errno("calloc");
560 f9c2e8e5 2022-02-13 thomas for (i = 0; i < nobj; i++) {
561 f9c2e8e5 2022-02-13 thomas uint32_t offset = be32toh(p->hdr.offsets[i]);
562 f9c2e8e5 2022-02-13 thomas if (offset & GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX) {
563 f9c2e8e5 2022-02-13 thomas uint64_t loffset;
564 f9c2e8e5 2022-02-13 thomas uint32_t idx;
565 f9c2e8e5 2022-02-13 thomas idx = offset & GOT_PACKIDX_OFFSET_VAL_MASK;
566 f9c2e8e5 2022-02-13 thomas if (idx >= p->nlargeobj ||
567 f9c2e8e5 2022-02-13 thomas p->nlargeobj == 0 ||
568 f9c2e8e5 2022-02-13 thomas p->hdr.large_offsets == NULL)
569 f9c2e8e5 2022-02-13 thomas return got_error(GOT_ERR_BAD_PACKIDX);
570 f9c2e8e5 2022-02-13 thomas loffset = be64toh(p->hdr.large_offsets[idx]);
571 f9c2e8e5 2022-02-13 thomas p->sorted_large_offsets[j].offset = loffset;
572 f9c2e8e5 2022-02-13 thomas p->sorted_large_offsets[j].idx = i;
575 f9c2e8e5 2022-02-13 thomas p->sorted_offsets[k].offset = offset;
576 f9c2e8e5 2022-02-13 thomas p->sorted_offsets[k].idx = i;
580 f9c2e8e5 2022-02-13 thomas if (j != p->nlargeobj || k != nobj - p->nlargeobj)
581 f9c2e8e5 2022-02-13 thomas return got_error(GOT_ERR_BAD_PACKIDX);
583 f9c2e8e5 2022-02-13 thomas qsort(p->sorted_offsets, nobj - p->nlargeobj,
584 f9c2e8e5 2022-02-13 thomas sizeof(p->sorted_offsets[0]), offset_cmp);
586 f9c2e8e5 2022-02-13 thomas if (p->sorted_large_offsets)
587 f9c2e8e5 2022-02-13 thomas qsort(p->sorted_large_offsets, p->nlargeobj,
588 f9c2e8e5 2022-02-13 thomas sizeof(p->sorted_large_offsets[0]), large_offset_cmp);
590 f9c2e8e5 2022-02-13 thomas return NULL;
593 876c234b 2018-09-10 stsp const struct got_error *
594 f9c2e8e5 2022-02-13 thomas got_packidx_get_offset_idx(int *idx, struct got_packidx *packidx, off_t offset)
596 f9c2e8e5 2022-02-13 thomas const struct got_error *err;
597 f9c2e8e5 2022-02-13 thomas uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
598 f9c2e8e5 2022-02-13 thomas int i, left, right;
600 f9c2e8e5 2022-02-13 thomas *idx = -1;
602 f9c2e8e5 2022-02-13 thomas if (packidx->sorted_offsets == NULL) {
603 f9c2e8e5 2022-02-13 thomas err = build_offset_index(packidx);
605 f9c2e8e5 2022-02-13 thomas return err;
608 f9c2e8e5 2022-02-13 thomas if (offset >= 0x7fffffff) {
609 f9c2e8e5 2022-02-13 thomas uint64_t lo;
610 f9c2e8e5 2022-02-13 thomas left = 0, right = packidx->nlargeobj - 1;
611 f9c2e8e5 2022-02-13 thomas while (left <= right) {
612 f9c2e8e5 2022-02-13 thomas i = ((left + right) / 2);
613 f9c2e8e5 2022-02-13 thomas lo = packidx->sorted_large_offsets[i].offset;
614 f9c2e8e5 2022-02-13 thomas if (lo == offset) {
615 f9c2e8e5 2022-02-13 thomas *idx = packidx->sorted_large_offsets[i].idx;
617 f9c2e8e5 2022-02-13 thomas } else if (offset > lo)
618 f9c2e8e5 2022-02-13 thomas left = i + 1;
619 f9c2e8e5 2022-02-13 thomas else if (offset < lo)
620 f9c2e8e5 2022-02-13 thomas right = i - 1;
623 f9c2e8e5 2022-02-13 thomas uint32_t o;
624 f9c2e8e5 2022-02-13 thomas left = 0, right = totobj - packidx->nlargeobj - 1;
625 f9c2e8e5 2022-02-13 thomas while (left <= right) {
626 f9c2e8e5 2022-02-13 thomas i = ((left + right) / 2);
627 f9c2e8e5 2022-02-13 thomas o = packidx->sorted_offsets[i].offset;
628 f9c2e8e5 2022-02-13 thomas if (o == offset) {
629 f9c2e8e5 2022-02-13 thomas *idx = packidx->sorted_offsets[i].idx;
631 f9c2e8e5 2022-02-13 thomas } else if (offset > o)
632 f9c2e8e5 2022-02-13 thomas left = i + 1;
633 f9c2e8e5 2022-02-13 thomas else if (offset < o)
634 f9c2e8e5 2022-02-13 thomas right = i - 1;
638 f9c2e8e5 2022-02-13 thomas return NULL;
641 f9c2e8e5 2022-02-13 thomas const struct got_error *
642 f9c2e8e5 2022-02-13 thomas got_packidx_get_object_id(struct got_object_id *id,
643 f9c2e8e5 2022-02-13 thomas struct got_packidx *packidx, int idx)
645 f9c2e8e5 2022-02-13 thomas uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
646 f9c2e8e5 2022-02-13 thomas struct got_packidx_object_id *oid;
648 f9c2e8e5 2022-02-13 thomas if (idx < 0 || idx >= totobj)
649 f9c2e8e5 2022-02-13 thomas return got_error(GOT_ERR_NO_OBJ);
651 f9c2e8e5 2022-02-13 thomas oid = &packidx->hdr.sorted_ids[idx];
652 f9c2e8e5 2022-02-13 thomas memcpy(id->sha1, oid->sha1, SHA1_DIGEST_LENGTH);
653 f9c2e8e5 2022-02-13 thomas return NULL;
656 f9c2e8e5 2022-02-13 thomas const struct got_error *
657 dd88155e 2019-06-29 stsp got_packidx_match_id_str_prefix(struct got_object_id_queue *matched_ids,
658 4277420a 2019-06-29 stsp struct got_packidx *packidx, const char *id_str_prefix)
660 dd88155e 2019-06-29 stsp const struct got_error *err = NULL;
661 4277420a 2019-06-29 stsp u_int8_t id0;
662 78fb0967 2020-09-09 naddy uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
663 4277420a 2019-06-29 stsp char hex[3];
664 4277420a 2019-06-29 stsp size_t prefix_len = strlen(id_str_prefix);
665 e09a504c 2019-06-28 stsp struct got_packidx_object_id *oid;
666 ec138a87 2022-01-03 thomas uint32_t i = 0;
668 dbdddfee 2021-06-23 naddy STAILQ_INIT(matched_ids);
670 4277420a 2019-06-29 stsp if (prefix_len < 2)
671 6dd1ece6 2019-11-10 stsp return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
673 4277420a 2019-06-29 stsp hex[0] = id_str_prefix[0];
674 4277420a 2019-06-29 stsp hex[1] = id_str_prefix[1];
675 4277420a 2019-06-29 stsp hex[2] = '\0';
676 4277420a 2019-06-29 stsp if (!got_parse_xdigit(&id0, hex))
677 6dd1ece6 2019-11-10 stsp return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
679 ec138a87 2022-01-03 thomas if (id0 > 0)
680 ec138a87 2022-01-03 thomas i = be32toh(packidx->hdr.fanout_table[id0 - 1]);
681 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[i];
682 4277420a 2019-06-29 stsp while (i < totobj && oid->sha1[0] == id0) {
683 4277420a 2019-06-29 stsp char id_str[SHA1_DIGEST_STRING_LENGTH];
684 dd88155e 2019-06-29 stsp struct got_object_qid *qid;
687 4277420a 2019-06-29 stsp if (!got_sha1_digest_to_str(oid->sha1, id_str, sizeof(id_str)))
688 4277420a 2019-06-29 stsp return got_error(GOT_ERR_NO_SPACE);
690 4277420a 2019-06-29 stsp cmp = strncmp(id_str, id_str_prefix, prefix_len);
691 4277420a 2019-06-29 stsp if (cmp < 0) {
692 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[++i];
694 4277420a 2019-06-29 stsp } else if (cmp > 0)
697 dd88155e 2019-06-29 stsp err = got_object_qid_alloc_partial(&qid);
700 ec242592 2022-04-22 thomas memcpy(qid->id.sha1, oid->sha1, SHA1_DIGEST_LENGTH);
701 dbdddfee 2021-06-23 naddy STAILQ_INSERT_TAIL(matched_ids, qid, entry);
703 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[++i];
707 0adc7bcc 2019-06-29 stsp got_object_id_queue_free(matched_ids);
708 dd88155e 2019-06-29 stsp return err;
711 b4f37570 2021-06-19 stsp static const struct got_error *
712 b4f37570 2021-06-19 stsp pack_stop_privsep_child(struct got_pack *pack)
714 96732e0b 2018-11-11 stsp const struct got_error *err = NULL;
716 876c234b 2018-09-10 stsp if (pack->privsep_child == NULL)
717 876c234b 2018-09-10 stsp return NULL;
719 876c234b 2018-09-10 stsp err = got_privsep_send_stop(pack->privsep_child->imsg_fd);
721 96732e0b 2018-11-11 stsp return err;
722 96732e0b 2018-11-11 stsp err = got_privsep_wait_for_child(pack->privsep_child->pid);
723 08578a35 2021-01-22 stsp if (close(pack->privsep_child->imsg_fd) == -1 && err == NULL)
724 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
725 cc2a8ef4 2021-06-19 tracey free(pack->privsep_child->ibuf);
726 876c234b 2018-09-10 stsp free(pack->privsep_child);
727 876c234b 2018-09-10 stsp pack->privsep_child = NULL;
728 876c234b 2018-09-10 stsp return err;
731 d7464085 2018-07-09 stsp const struct got_error *
732 7e656b93 2018-03-17 stsp got_pack_close(struct got_pack *pack)
734 d7464085 2018-07-09 stsp const struct got_error *err = NULL;
736 b4f37570 2021-06-19 stsp err = pack_stop_privsep_child(pack);
737 876c234b 2018-09-10 stsp if (pack->map && munmap(pack->map, pack->filesize) == -1 && !err)
738 638f9024 2019-05-13 stsp err = got_error_from_errno("munmap");
739 08578a35 2021-01-22 stsp if (pack->fd != -1 && close(pack->fd) == -1 && err == NULL)
740 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
741 8b2180d4 2018-04-26 stsp pack->fd = -1;
742 4589e373 2018-03-17 stsp free(pack->path_packfile);
743 4589e373 2018-03-17 stsp pack->path_packfile = NULL;
744 4589e373 2018-03-17 stsp pack->filesize = 0;
745 ab2f42e7 2019-11-10 stsp if (pack->delta_cache) {
746 ab2f42e7 2019-11-10 stsp got_delta_cache_free(pack->delta_cache);
747 ab2f42e7 2019-11-10 stsp pack->delta_cache = NULL;
750 c7fe698a 2018-01-23 stsp return err;
753 668a20f6 2020-03-18 stsp const struct got_error *
754 668a20f6 2020-03-18 stsp got_pack_parse_object_type_and_size(uint8_t *type, uint64_t *size, size_t *len,
755 d7464085 2018-07-09 stsp struct got_pack *pack, off_t offset)
757 a487c1d0 2018-01-14 stsp uint8_t t = 0;
758 a487c1d0 2018-01-14 stsp uint64_t s = 0;
759 a487c1d0 2018-01-14 stsp uint8_t sizeN;
760 d7464085 2018-07-09 stsp size_t mapoff = 0;
765 d7464085 2018-07-09 stsp if (offset >= pack->filesize)
766 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
768 d7464085 2018-07-09 stsp if (pack->map) {
769 d7464085 2018-07-09 stsp mapoff = (size_t)offset;
771 d7464085 2018-07-09 stsp if (lseek(pack->fd, offset, SEEK_SET) == -1)
772 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
776 a1fd68d8 2018-01-12 stsp /* We do not support size values which don't fit in 64 bit. */
778 a487c1d0 2018-01-14 stsp return got_error(GOT_ERR_NO_SPACE);
780 d7464085 2018-07-09 stsp if (pack->map) {
781 1944573a 2022-01-10 thomas if (mapoff + sizeof(sizeN) >= pack->filesize)
782 1944573a 2022-01-10 thomas return got_error(GOT_ERR_BAD_PACKFILE);
783 d7464085 2018-07-09 stsp sizeN = *(pack->map + mapoff);
784 d7464085 2018-07-09 stsp mapoff += sizeof(sizeN);
786 d7464085 2018-07-09 stsp ssize_t n = read(pack->fd, &sizeN, sizeof(sizeN));
788 638f9024 2019-05-13 stsp return got_error_from_errno("read");
789 d7464085 2018-07-09 stsp if (n != sizeof(sizeN))
790 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
792 d7464085 2018-07-09 stsp *len += sizeof(sizeN);
794 a1fd68d8 2018-01-12 stsp if (i == 0) {
795 a487c1d0 2018-01-14 stsp t = (sizeN & GOT_PACK_OBJ_SIZE0_TYPE_MASK) >>
796 a1fd68d8 2018-01-12 stsp GOT_PACK_OBJ_SIZE0_TYPE_MASK_SHIFT;
797 a487c1d0 2018-01-14 stsp s = (sizeN & GOT_PACK_OBJ_SIZE0_VAL_MASK);
799 a1fd68d8 2018-01-12 stsp size_t shift = 4 + 7 * (i - 1);
800 a487c1d0 2018-01-14 stsp s |= ((sizeN & GOT_PACK_OBJ_SIZE_VAL_MASK) << shift);
803 a1fd68d8 2018-01-12 stsp } while (sizeN & GOT_PACK_OBJ_SIZE_MORE);
807 a487c1d0 2018-01-14 stsp return NULL;
810 a1fd68d8 2018-01-12 stsp static const struct got_error *
811 5f25cc85 2019-11-26 stsp open_plain_object(struct got_object **obj, struct got_object_id *id,
812 5f25cc85 2019-11-26 stsp uint8_t type, off_t offset, size_t size, int idx)
814 6ccb713b 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
815 6ccb713b 2018-01-19 stsp if (*obj == NULL)
816 638f9024 2019-05-13 stsp return got_error_from_errno("calloc");
818 6ccb713b 2018-01-19 stsp (*obj)->type = type;
819 6ccb713b 2018-01-19 stsp (*obj)->flags = GOT_OBJ_FLAG_PACKED;
820 c59b3346 2018-09-11 stsp (*obj)->pack_idx = idx;
821 6ccb713b 2018-01-19 stsp (*obj)->hdrlen = 0;
822 6ccb713b 2018-01-19 stsp (*obj)->size = size;
823 106807b4 2018-09-15 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
824 6ccb713b 2018-01-19 stsp (*obj)->pack_offset = offset;
826 b107e67f 2018-01-19 stsp return NULL;
829 b107e67f 2018-01-19 stsp static const struct got_error *
830 d7464085 2018-07-09 stsp parse_negative_offset(int64_t *offset, size_t *len, struct got_pack *pack,
831 d7464085 2018-07-09 stsp off_t delta_offset)
833 b107e67f 2018-01-19 stsp int64_t o = 0;
834 b107e67f 2018-01-19 stsp uint8_t offN;
837 a0de39f3 2019-08-09 stsp *offset = 0;
841 b107e67f 2018-01-19 stsp /* We do not support offset values which don't fit in 64 bit. */
843 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_NO_SPACE);
845 d7464085 2018-07-09 stsp if (pack->map) {
846 d7464085 2018-07-09 stsp size_t mapoff;
847 d7464085 2018-07-09 stsp mapoff = (size_t)delta_offset + *len;
848 1944573a 2022-01-10 thomas if (mapoff + sizeof(offN) >= pack->filesize)
849 1944573a 2022-01-10 thomas return got_error(GOT_ERR_PACK_OFFSET);
850 d7464085 2018-07-09 stsp offN = *(pack->map + mapoff);
853 d7464085 2018-07-09 stsp n = read(pack->fd, &offN, sizeof(offN));
855 638f9024 2019-05-13 stsp return got_error_from_errno("read");
856 d7464085 2018-07-09 stsp if (n != sizeof(offN))
857 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
859 d7464085 2018-07-09 stsp *len += sizeof(offN);
861 b107e67f 2018-01-19 stsp if (i == 0)
862 b107e67f 2018-01-19 stsp o = (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
866 cecc778e 2018-01-23 stsp o += (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
869 b107e67f 2018-01-19 stsp } while (offN & GOT_PACK_OBJ_DELTA_OFF_MORE);
871 b107e67f 2018-01-19 stsp *offset = o;
872 6ccb713b 2018-01-19 stsp return NULL;
875 668a20f6 2020-03-18 stsp const struct got_error *
876 48b4f239 2021-12-31 thomas got_pack_parse_offset_delta(off_t *base_offset, size_t *len,
877 48b4f239 2021-12-31 thomas struct got_pack *pack, off_t offset, int tslen)
879 96f5e8b3 2018-01-23 stsp const struct got_error *err;
880 b107e67f 2018-01-19 stsp int64_t negoffset;
881 b107e67f 2018-01-19 stsp size_t negofflen;
885 d7464085 2018-07-09 stsp err = parse_negative_offset(&negoffset, &negofflen, pack,
886 d7464085 2018-07-09 stsp offset + tslen);
888 b107e67f 2018-01-19 stsp return err;
890 b107e67f 2018-01-19 stsp /* Compute the base object's offset (must be in the same pack file). */
891 96f5e8b3 2018-01-23 stsp *base_offset = (offset - negoffset);
892 96f5e8b3 2018-01-23 stsp if (*base_offset <= 0)
893 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_BAD_PACKFILE);
895 d7464085 2018-07-09 stsp *len = negofflen;
896 96f5e8b3 2018-01-23 stsp return NULL;
899 0e22967e 2018-02-11 stsp static const struct got_error *
900 42c69117 2019-11-10 stsp read_delta_data(uint8_t **delta_buf, size_t *delta_len,
901 9249e7e3 2022-05-12 thomas size_t *delta_compressed_len, size_t delta_data_offset,
902 9249e7e3 2022-05-12 thomas struct got_pack *pack)
904 42c69117 2019-11-10 stsp const struct got_error *err = NULL;
905 9249e7e3 2022-05-12 thomas size_t consumed = 0;
907 42c69117 2019-11-10 stsp if (pack->map) {
908 42c69117 2019-11-10 stsp if (delta_data_offset >= pack->filesize)
909 42c69117 2019-11-10 stsp return got_error(GOT_ERR_PACK_OFFSET);
910 2e5a6fad 2020-03-18 stsp err = got_inflate_to_mem_mmap(delta_buf, delta_len,
911 9249e7e3 2022-05-12 thomas &consumed, NULL, pack->map, delta_data_offset,
912 2e5a6fad 2020-03-18 stsp pack->filesize - delta_data_offset);
914 9249e7e3 2022-05-12 thomas return err;
916 42c69117 2019-11-10 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET) == -1)
917 42c69117 2019-11-10 stsp return got_error_from_errno("lseek");
918 9249e7e3 2022-05-12 thomas err = got_inflate_to_mem_fd(delta_buf, delta_len,
919 9249e7e3 2022-05-12 thomas &consumed, NULL, 0, pack->fd);
921 9249e7e3 2022-05-12 thomas return err;
924 9249e7e3 2022-05-12 thomas if (delta_compressed_len)
925 9249e7e3 2022-05-12 thomas *delta_compressed_len = consumed;
927 9249e7e3 2022-05-12 thomas return NULL;
930 96f5e8b3 2018-01-23 stsp static const struct got_error *
931 c336f889 2018-07-23 stsp add_delta(struct got_delta_chain *deltas, off_t delta_offset, size_t tslen,
932 42c69117 2019-11-10 stsp int delta_type, size_t delta_size, size_t delta_data_offset)
934 bdd2fbb3 2018-02-11 stsp struct got_delta *delta;
936 c336f889 2018-07-23 stsp delta = got_delta_open(delta_offset, tslen, delta_type, delta_size,
937 42c69117 2019-11-10 stsp delta_data_offset);
938 bdd2fbb3 2018-02-11 stsp if (delta == NULL)
939 638f9024 2019-05-13 stsp return got_error_from_errno("got_delta_open");
940 bdd2fbb3 2018-02-11 stsp /* delta is freed in got_object_close() */
941 bdd2fbb3 2018-02-11 stsp deltas->nentries++;
942 dbdddfee 2021-06-23 naddy STAILQ_INSERT_HEAD(&deltas->entries, delta, entry);
943 bdd2fbb3 2018-02-11 stsp return NULL;
946 bdd2fbb3 2018-02-11 stsp static const struct got_error *
947 6b9c9673 2018-01-23 stsp resolve_offset_delta(struct got_delta_chain *deltas,
948 c8ecd499 2018-09-09 stsp struct got_packidx *packidx, struct got_pack *pack, off_t delta_offset,
949 c8ecd499 2018-09-09 stsp size_t tslen, int delta_type, size_t delta_size, unsigned int recursion)
952 a3500804 2018-01-23 stsp const struct got_error *err;
953 c3703302 2018-01-23 stsp off_t base_offset;
954 c3703302 2018-01-23 stsp uint8_t base_type;
955 c3703302 2018-01-23 stsp uint64_t base_size;
956 c3703302 2018-01-23 stsp size_t base_tslen;
957 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
958 42c69117 2019-11-10 stsp size_t consumed;
960 668a20f6 2020-03-18 stsp err = got_pack_parse_offset_delta(&base_offset, &consumed, pack,
961 d7464085 2018-07-09 stsp delta_offset, tslen);
963 a3500804 2018-01-23 stsp return err;
965 d7464085 2018-07-09 stsp delta_data_offset = delta_offset + tslen + consumed;
966 d7464085 2018-07-09 stsp if (delta_data_offset >= pack->filesize)
967 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
969 d7464085 2018-07-09 stsp if (pack->map == NULL) {
970 d7464085 2018-07-09 stsp delta_data_offset = lseek(pack->fd, 0, SEEK_CUR);
971 d7464085 2018-07-09 stsp if (delta_data_offset == -1)
972 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
975 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type, delta_size,
976 42c69117 2019-11-10 stsp delta_data_offset);
978 1a35c1bc 2019-05-22 stsp return err;
980 c3703302 2018-01-23 stsp /* An offset delta must be in the same packfile. */
981 1a35c1bc 2019-05-22 stsp if (base_offset >= pack->filesize)
982 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_PACK_OFFSET);
984 668a20f6 2020-03-18 stsp err = got_pack_parse_object_type_and_size(&base_type, &base_size,
985 668a20f6 2020-03-18 stsp &base_tslen, pack, base_offset);
987 1a35c1bc 2019-05-22 stsp return err;
989 668a20f6 2020-03-18 stsp return got_pack_resolve_delta_chain(deltas, packidx, pack, base_offset,
990 b0e2201a 2018-06-22 stsp base_tslen, base_type, base_size, recursion - 1);
993 c4330eff 2021-06-22 stsp const struct got_error *
994 c4330eff 2021-06-22 stsp got_pack_parse_ref_delta(struct got_object_id *id,
995 c4330eff 2021-06-22 stsp struct got_pack *pack, off_t delta_offset, int tslen)
997 c4330eff 2021-06-22 stsp if (pack->map) {
998 c4330eff 2021-06-22 stsp size_t mapoff = delta_offset + tslen;
999 1944573a 2022-01-10 thomas if (mapoff + sizeof(*id) >= pack->filesize)
1000 1944573a 2022-01-10 thomas return got_error(GOT_ERR_PACK_OFFSET);
1001 c4330eff 2021-06-22 stsp memcpy(id, pack->map + mapoff, sizeof(*id));
1003 c4330eff 2021-06-22 stsp ssize_t n;
1004 c4330eff 2021-06-22 stsp n = read(pack->fd, id, sizeof(*id));
1005 c4330eff 2021-06-22 stsp if (n < 0)
1006 c4330eff 2021-06-22 stsp return got_error_from_errno("read");
1007 c4330eff 2021-06-22 stsp if (n != sizeof(*id))
1008 c4330eff 2021-06-22 stsp return got_error(GOT_ERR_BAD_PACKFILE);
1011 c4330eff 2021-06-22 stsp return NULL;
1014 c3703302 2018-01-23 stsp static const struct got_error *
1015 c8ecd499 2018-09-09 stsp resolve_ref_delta(struct got_delta_chain *deltas, struct got_packidx *packidx,
1016 c8ecd499 2018-09-09 stsp struct got_pack *pack, off_t delta_offset, size_t tslen, int delta_type,
1017 c8ecd499 2018-09-09 stsp size_t delta_size, unsigned int recursion)
1019 6b9c9673 2018-01-23 stsp const struct got_error *err;
1020 6b9c9673 2018-01-23 stsp struct got_object_id id;
1022 6b9c9673 2018-01-23 stsp off_t base_offset;
1023 6b9c9673 2018-01-23 stsp uint8_t base_type;
1024 6b9c9673 2018-01-23 stsp uint64_t base_size;
1025 6b9c9673 2018-01-23 stsp size_t base_tslen;
1026 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
1028 42c69117 2019-11-10 stsp if (delta_offset + tslen >= pack->filesize)
1029 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1031 c4330eff 2021-06-22 stsp err = got_pack_parse_ref_delta(&id, pack, delta_offset, tslen);
1033 c4330eff 2021-06-22 stsp return err;
1034 d7464085 2018-07-09 stsp if (pack->map) {
1035 c4330eff 2021-06-22 stsp delta_data_offset = delta_offset + tslen + sizeof(id);
1037 e40b19ed 2020-01-06 stsp delta_data_offset = lseek(pack->fd, 0, SEEK_CUR);
1038 e40b19ed 2020-01-06 stsp if (delta_data_offset == -1)
1039 e40b19ed 2020-01-06 stsp return got_error_from_errno("lseek");
1042 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type, delta_size,
1043 42c69117 2019-11-10 stsp delta_data_offset);
1045 1a35c1bc 2019-05-22 stsp return err;
1047 652b2703 2018-06-22 stsp /* Delta base must be in the same pack file. */
1048 1510f469 2018-09-09 stsp idx = got_packidx_get_object_idx(packidx, &id);
1049 1a35c1bc 2019-05-22 stsp if (idx == -1)
1050 668a20f6 2020-03-18 stsp return got_error(GOT_ERR_NO_OBJ);
1052 02828bfd 2021-06-22 stsp base_offset = got_packidx_get_object_offset(packidx, idx);
1053 1a35c1bc 2019-05-22 stsp if (base_offset == (uint64_t)-1)
1054 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_BAD_PACKIDX);
1056 1a35c1bc 2019-05-22 stsp if (base_offset >= pack->filesize)
1057 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_PACK_OFFSET);
1059 668a20f6 2020-03-18 stsp err = got_pack_parse_object_type_and_size(&base_type, &base_size,
1060 668a20f6 2020-03-18 stsp &base_tslen, pack, base_offset);
1062 1a35c1bc 2019-05-22 stsp return err;
1064 668a20f6 2020-03-18 stsp return got_pack_resolve_delta_chain(deltas, packidx, pack, base_offset,
1065 0c048b15 2018-04-27 stsp base_tslen, base_type, base_size, recursion - 1);
1068 668a20f6 2020-03-18 stsp const struct got_error *
1069 668a20f6 2020-03-18 stsp got_pack_resolve_delta_chain(struct got_delta_chain *deltas,
1070 668a20f6 2020-03-18 stsp struct got_packidx *packidx, struct got_pack *pack, off_t delta_offset,
1071 668a20f6 2020-03-18 stsp size_t tslen, int delta_type, size_t delta_size, unsigned int recursion)
1073 c3703302 2018-01-23 stsp const struct got_error *err = NULL;
1075 5b7e13a7 2018-04-02 stsp if (--recursion == 0)
1076 5b7e13a7 2018-04-02 stsp return got_error(GOT_ERR_RECURSION);
1078 c3703302 2018-01-23 stsp switch (delta_type) {
1079 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_COMMIT:
1080 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TREE:
1081 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_BLOB:
1082 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TAG:
1083 c3703302 2018-01-23 stsp /* Plain types are the final delta base. Recursion ends. */
1084 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type,
1085 42c69117 2019-11-10 stsp delta_size, 0);
1087 a3500804 2018-01-23 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
1088 c8ecd499 2018-09-09 stsp err = resolve_offset_delta(deltas, packidx, pack,
1089 b0e2201a 2018-06-22 stsp delta_offset, tslen, delta_type, delta_size, recursion - 1);
1091 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_REF_DELTA:
1092 c8ecd499 2018-09-09 stsp err = resolve_ref_delta(deltas, packidx, pack,
1093 b0e2201a 2018-06-22 stsp delta_offset, tslen, delta_type, delta_size, recursion - 1);
1096 4810de4a 2018-04-01 stsp return got_error(GOT_ERR_OBJ_TYPE);
1099 96f5e8b3 2018-01-23 stsp return err;
1102 96f5e8b3 2018-01-23 stsp static const struct got_error *
1103 a98c62b1 2018-09-09 stsp open_delta_object(struct got_object **obj, struct got_packidx *packidx,
1104 a98c62b1 2018-09-09 stsp struct got_pack *pack, struct got_object_id *id, off_t offset,
1105 c59b3346 2018-09-11 stsp size_t tslen, int delta_type, size_t delta_size, int idx)
1107 96f5e8b3 2018-01-23 stsp const struct got_error *err = NULL;
1108 96f5e8b3 2018-01-23 stsp int resolved_type;
1110 b107e67f 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
1111 b107e67f 2018-01-19 stsp if (*obj == NULL)
1112 638f9024 2019-05-13 stsp return got_error_from_errno("calloc");
1114 96f5e8b3 2018-01-23 stsp (*obj)->flags = 0;
1115 b107e67f 2018-01-19 stsp (*obj)->hdrlen = 0;
1116 39e73dc9 2018-03-03 stsp (*obj)->size = 0; /* Not known because deltas aren't applied yet. */
1117 106807b4 2018-09-15 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
1118 cecc778e 2018-01-23 stsp (*obj)->pack_offset = offset + tslen;
1120 dbdddfee 2021-06-23 naddy STAILQ_INIT(&(*obj)->deltas.entries);
1121 1a35c1bc 2019-05-22 stsp (*obj)->flags |= GOT_OBJ_FLAG_DELTIFIED;
1122 96f5e8b3 2018-01-23 stsp (*obj)->flags |= GOT_OBJ_FLAG_PACKED;
1123 c59b3346 2018-09-11 stsp (*obj)->pack_idx = idx;
1125 668a20f6 2020-03-18 stsp err = got_pack_resolve_delta_chain(&(*obj)->deltas, packidx, pack,
1126 668a20f6 2020-03-18 stsp offset, tslen, delta_type, delta_size,
1127 668a20f6 2020-03-18 stsp GOT_DELTA_CHAIN_RECURSION_MAX);
1129 96f5e8b3 2018-01-23 stsp goto done;
1131 96f5e8b3 2018-01-23 stsp err = got_delta_chain_get_base_type(&resolved_type, &(*obj)->deltas);
1133 96f5e8b3 2018-01-23 stsp goto done;
1134 96f5e8b3 2018-01-23 stsp (*obj)->type = resolved_type;
1136 96f5e8b3 2018-01-23 stsp if (err) {
1137 96f5e8b3 2018-01-23 stsp got_object_close(*obj);
1138 96f5e8b3 2018-01-23 stsp *obj = NULL;
1140 96f5e8b3 2018-01-23 stsp return err;
1143 2090a03d 2018-09-09 stsp const struct got_error *
1144 2090a03d 2018-09-09 stsp got_packfile_open_object(struct got_object **obj, struct got_pack *pack,
1145 6fd11751 2018-06-04 stsp struct got_packidx *packidx, int idx, struct got_object_id *id)
1147 a1fd68d8 2018-01-12 stsp const struct got_error *err = NULL;
1148 a1fd68d8 2018-01-12 stsp off_t offset;
1149 6c00b545 2018-01-17 stsp uint8_t type;
1150 6c00b545 2018-01-17 stsp uint64_t size;
1151 3ee5fc21 2018-01-17 stsp size_t tslen;
1153 6c00b545 2018-01-17 stsp *obj = NULL;
1155 02828bfd 2021-06-22 stsp offset = got_packidx_get_object_offset(packidx, idx);
1156 a1fd68d8 2018-01-12 stsp if (offset == (uint64_t)-1)
1157 a1fd68d8 2018-01-12 stsp return got_error(GOT_ERR_BAD_PACKIDX);
1159 668a20f6 2020-03-18 stsp err = got_pack_parse_object_type_and_size(&type, &size, &tslen,
1160 668a20f6 2020-03-18 stsp pack, offset);
1162 35c73765 2018-09-09 stsp return err;
1164 6c00b545 2018-01-17 stsp switch (type) {
1165 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_COMMIT:
1166 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_TREE:
1167 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_BLOB:
1168 d33fc9ef 2018-01-23 stsp case GOT_OBJ_TYPE_TAG:
1169 5f25cc85 2019-11-26 stsp err = open_plain_object(obj, id, type, offset + tslen,
1170 5f25cc85 2019-11-26 stsp size, idx);
1172 b107e67f 2018-01-19 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
1173 a48db7e5 2018-01-23 stsp case GOT_OBJ_TYPE_REF_DELTA:
1174 a98c62b1 2018-09-09 stsp err = open_delta_object(obj, packidx, pack, id, offset,
1175 c59b3346 2018-09-11 stsp tslen, type, size, idx);
1178 4810de4a 2018-04-01 stsp err = got_error(GOT_ERR_OBJ_TYPE);
1182 3ee5fc21 2018-01-17 stsp return err;
1185 d582f26c 2020-03-18 stsp const struct got_error *
1186 48b4f239 2021-12-31 thomas got_pack_get_delta_chain_max_size(uint64_t *max_size,
1187 48b4f239 2021-12-31 thomas struct got_delta_chain *deltas, struct got_pack *pack)
1189 22484865 2018-03-13 stsp struct got_delta *delta;
1190 22484865 2018-03-13 stsp uint64_t base_size = 0, result_size = 0;
1192 22484865 2018-03-13 stsp *max_size = 0;
1193 dbdddfee 2021-06-23 naddy STAILQ_FOREACH(delta, &deltas->entries, entry) {
1194 22484865 2018-03-13 stsp /* Plain object types are the delta base. */
1195 22484865 2018-03-13 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1196 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1197 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1198 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1199 22484865 2018-03-13 stsp const struct got_error *err;
1200 42c69117 2019-11-10 stsp uint8_t *delta_buf;
1201 42c69117 2019-11-10 stsp size_t delta_len;
1202 ab2f42e7 2019-11-10 stsp int cached = 1;
1204 ab2f42e7 2019-11-10 stsp got_delta_cache_get(&delta_buf, &delta_len,
1205 ab2f42e7 2019-11-10 stsp pack->delta_cache, delta->data_offset);
1206 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1207 ab2f42e7 2019-11-10 stsp cached = 0;
1208 ab2f42e7 2019-11-10 stsp err = read_delta_data(&delta_buf, &delta_len,
1209 9249e7e3 2022-05-12 thomas NULL, delta->data_offset, pack);
1211 ab2f42e7 2019-11-10 stsp return err;
1212 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1213 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1214 ab2f42e7 2019-11-10 stsp if (err == NULL)
1215 ab2f42e7 2019-11-10 stsp cached = 1;
1216 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1217 ab2f42e7 2019-11-10 stsp free(delta_buf);
1218 ab2f42e7 2019-11-10 stsp return err;
1221 a53d2f13 2018-03-17 stsp err = got_delta_get_sizes(&base_size, &result_size,
1222 42c69117 2019-11-10 stsp delta_buf, delta_len);
1223 ab2f42e7 2019-11-10 stsp if (!cached)
1224 ab2f42e7 2019-11-10 stsp free(delta_buf);
1226 22484865 2018-03-13 stsp return err;
1228 22484865 2018-03-13 stsp base_size = delta->size;
1229 22484865 2018-03-13 stsp if (base_size > *max_size)
1230 22484865 2018-03-13 stsp *max_size = base_size;
1231 22484865 2018-03-13 stsp if (result_size > *max_size)
1232 22484865 2018-03-13 stsp *max_size = result_size;
1235 9feb4ff2 2018-03-14 stsp return NULL;
1238 ac544f8c 2019-01-13 stsp const struct got_error *
1239 42c69117 2019-11-10 stsp got_pack_get_max_delta_object_size(uint64_t *size, struct got_object *obj,
1240 42c69117 2019-11-10 stsp struct got_pack *pack)
1242 85a703fa 2019-01-13 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0)
1243 85a703fa 2019-01-13 stsp return got_error(GOT_ERR_OBJ_TYPE);
1245 d582f26c 2020-03-18 stsp return got_pack_get_delta_chain_max_size(size, &obj->deltas, pack);
1248 668a20f6 2020-03-18 stsp const struct got_error *
1249 4788f1ce 2020-03-18 stsp got_pack_dump_delta_chain_to_file(size_t *result_size,
1250 4788f1ce 2020-03-18 stsp struct got_delta_chain *deltas, struct got_pack *pack, FILE *outfile,
1251 4788f1ce 2020-03-18 stsp FILE *base_file, FILE *accum_file)
1253 efd2a263 2018-01-19 stsp const struct got_error *err = NULL;
1254 6691714a 2018-01-23 stsp struct got_delta *delta;
1255 42c69117 2019-11-10 stsp uint8_t *base_buf = NULL, *accum_buf = NULL, *delta_buf;
1256 42c69117 2019-11-10 stsp size_t base_bufsz = 0, accum_size = 0, delta_len;
1257 22484865 2018-03-13 stsp uint64_t max_size;
1258 6691714a 2018-01-23 stsp int n = 0;
1260 b29656e2 2018-03-16 stsp *result_size = 0;
1262 dbdddfee 2021-06-23 naddy if (STAILQ_EMPTY(&deltas->entries))
1263 6691714a 2018-01-23 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
1265 8628c62d 2018-03-15 stsp /* We process small enough files entirely in memory for speed. */
1266 d582f26c 2020-03-18 stsp err = got_pack_get_delta_chain_max_size(&max_size, deltas, pack);
1268 22484865 2018-03-13 stsp return err;
1269 8628c62d 2018-03-15 stsp if (max_size < GOT_DELTA_RESULT_SIZE_CACHED_MAX) {
1270 8628c62d 2018-03-15 stsp accum_buf = malloc(max_size);
1271 8628c62d 2018-03-15 stsp if (accum_buf == NULL)
1272 638f9024 2019-05-13 stsp return got_error_from_errno("malloc");
1273 3840f4c9 2018-09-12 stsp base_file = NULL;
1274 3840f4c9 2018-09-12 stsp accum_file = NULL;
1275 b490237f 2022-01-12 thomas } else {
1276 b490237f 2022-01-12 thomas if (fseeko(base_file, 0L, SEEK_SET) == -1)
1277 b490237f 2022-01-12 thomas return got_error_from_errno("fseeko");
1278 b490237f 2022-01-12 thomas if (fseeko(accum_file, 0L, SEEK_SET) == -1)
1279 b490237f 2022-01-12 thomas return got_error_from_errno("fseeko");
1282 6691714a 2018-01-23 stsp /* Deltas are ordered in ascending order. */
1283 dbdddfee 2021-06-23 naddy STAILQ_FOREACH(delta, &deltas->entries, entry) {
1284 ab2f42e7 2019-11-10 stsp int cached = 1;
1285 a6b158cc 2018-02-11 stsp if (n == 0) {
1286 34fca9c3 2018-11-11 stsp size_t mapoff;
1287 0c048b15 2018-04-27 stsp off_t delta_data_offset;
1289 a6b158cc 2018-02-11 stsp /* Plain object types are the delta base. */
1290 a6b158cc 2018-02-11 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1291 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1292 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1293 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1294 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1295 72eb3431 2018-04-01 stsp goto done;
1298 0c048b15 2018-04-27 stsp delta_data_offset = delta->offset + delta->tslen;
1299 0c048b15 2018-04-27 stsp if (delta_data_offset >= pack->filesize) {
1300 0c048b15 2018-04-27 stsp err = got_error(GOT_ERR_PACK_OFFSET);
1301 0c048b15 2018-04-27 stsp goto done;
1303 d7464085 2018-07-09 stsp if (pack->map == NULL) {
1304 d7464085 2018-07-09 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET)
1306 638f9024 2019-05-13 stsp err = got_error_from_errno("lseek");
1307 d7464085 2018-07-09 stsp goto done;
1310 d7464085 2018-07-09 stsp if (base_file) {
1311 d7464085 2018-07-09 stsp if (pack->map) {
1312 d7464085 2018-07-09 stsp mapoff = (size_t)delta_data_offset;
1313 d7464085 2018-07-09 stsp err = got_inflate_to_file_mmap(
1314 4788f1ce 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->map,
1315 4788f1ce 2020-03-18 stsp mapoff, pack->filesize - mapoff,
1316 4788f1ce 2020-03-18 stsp base_file);
1318 34fca9c3 2018-11-11 stsp err = got_inflate_to_file_fd(
1319 4788f1ce 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->fd,
1320 4788f1ce 2020-03-18 stsp base_file);
1322 d7464085 2018-07-09 stsp if (pack->map) {
1323 d7464085 2018-07-09 stsp mapoff = (size_t)delta_data_offset;
1324 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&base_buf,
1325 2e5a6fad 2020-03-18 stsp &base_bufsz, NULL, NULL,
1326 2e5a6fad 2020-03-18 stsp pack->map, mapoff,
1327 d7464085 2018-07-09 stsp pack->filesize - mapoff);
1329 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&base_buf,
1330 55fdd257 2020-03-18 stsp &base_bufsz, NULL, NULL, max_size,
1331 55fdd257 2020-03-18 stsp pack->fd);
1334 a6b158cc 2018-02-11 stsp goto done;
1336 8628c62d 2018-03-15 stsp if (base_file)
1337 8628c62d 2018-03-15 stsp rewind(base_file);
1341 ab2f42e7 2019-11-10 stsp got_delta_cache_get(&delta_buf, &delta_len,
1342 ab2f42e7 2019-11-10 stsp pack->delta_cache, delta->data_offset);
1343 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1344 ab2f42e7 2019-11-10 stsp cached = 0;
1345 9249e7e3 2022-05-12 thomas err = read_delta_data(&delta_buf, &delta_len, NULL,
1346 ab2f42e7 2019-11-10 stsp delta->data_offset, pack);
1348 ab2f42e7 2019-11-10 stsp goto done;
1349 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1350 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1351 ab2f42e7 2019-11-10 stsp if (err == NULL)
1352 ab2f42e7 2019-11-10 stsp cached = 1;
1353 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1354 ab2f42e7 2019-11-10 stsp free(delta_buf);
1355 ab2f42e7 2019-11-10 stsp goto done;
1358 8628c62d 2018-03-15 stsp if (base_buf) {
1359 34fca9c3 2018-11-11 stsp err = got_delta_apply_in_mem(base_buf, base_bufsz,
1360 42c69117 2019-11-10 stsp delta_buf, delta_len, accum_buf,
1361 34fca9c3 2018-11-11 stsp &accum_size, max_size);
1364 42c69117 2019-11-10 stsp err = got_delta_apply(base_file, delta_buf,
1365 42c69117 2019-11-10 stsp delta_len,
1366 8628c62d 2018-03-15 stsp /* Final delta application writes to output file. */
1367 b29656e2 2018-03-16 stsp ++n < deltas->nentries ? accum_file : outfile,
1368 b29656e2 2018-03-16 stsp &accum_size);
1370 ab2f42e7 2019-11-10 stsp if (!cached)
1371 ab2f42e7 2019-11-10 stsp free(delta_buf);
1373 6691714a 2018-01-23 stsp goto done;
1375 710bb5ca 2018-01-23 stsp if (n < deltas->nentries) {
1376 6691714a 2018-01-23 stsp /* Accumulated delta becomes the new base. */
1377 8628c62d 2018-03-15 stsp if (base_buf) {
1378 8628c62d 2018-03-15 stsp uint8_t *tmp = accum_buf;
1380 34fca9c3 2018-11-11 stsp * Base buffer switches roles with accumulation
1381 34fca9c3 2018-11-11 stsp * buffer. Ensure it can hold the largest
1382 34fca9c3 2018-11-11 stsp * result in the delta chain. The initial
1383 34fca9c3 2018-11-11 stsp * allocation might have been smaller.
1385 34fca9c3 2018-11-11 stsp if (base_bufsz < max_size) {
1386 34fca9c3 2018-11-11 stsp uint8_t *p;
1387 34fca9c3 2018-11-11 stsp p = reallocarray(base_buf, 1, max_size);
1388 34fca9c3 2018-11-11 stsp if (p == NULL) {
1389 638f9024 2019-05-13 stsp err = got_error_from_errno(
1390 230a42bd 2019-05-11 jcs "reallocarray");
1391 34fca9c3 2018-11-11 stsp goto done;
1393 34fca9c3 2018-11-11 stsp base_buf = p;
1394 34fca9c3 2018-11-11 stsp base_bufsz = max_size;
1396 8628c62d 2018-03-15 stsp accum_buf = base_buf;
1397 8628c62d 2018-03-15 stsp base_buf = tmp;
1399 8628c62d 2018-03-15 stsp FILE *tmp = accum_file;
1400 8628c62d 2018-03-15 stsp accum_file = base_file;
1401 8628c62d 2018-03-15 stsp base_file = tmp;
1402 8628c62d 2018-03-15 stsp rewind(base_file);
1403 8628c62d 2018-03-15 stsp rewind(accum_file);
1409 8628c62d 2018-03-15 stsp free(base_buf);
1410 8628c62d 2018-03-15 stsp if (accum_buf) {
1411 8628c62d 2018-03-15 stsp size_t len = fwrite(accum_buf, 1, accum_size, outfile);
1412 8628c62d 2018-03-15 stsp free(accum_buf);
1413 8628c62d 2018-03-15 stsp if (len != accum_size)
1414 673702af 2018-07-23 stsp err = got_ferror(outfile, GOT_ERR_IO);
1416 6691714a 2018-01-23 stsp rewind(outfile);
1417 b29656e2 2018-03-16 stsp if (err == NULL)
1418 b29656e2 2018-03-16 stsp *result_size = accum_size;
1419 e0ab43e7 2018-03-16 stsp return err;
1422 668a20f6 2020-03-18 stsp const struct got_error *
1423 668a20f6 2020-03-18 stsp got_pack_dump_delta_chain_to_mem(uint8_t **outbuf, size_t *outlen,
1424 48095039 2018-09-09 stsp struct got_delta_chain *deltas, struct got_pack *pack)
1426 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1427 e0ab43e7 2018-03-16 stsp struct got_delta *delta;
1428 42c69117 2019-11-10 stsp uint8_t *base_buf = NULL, *accum_buf = NULL, *delta_buf;
1429 42c69117 2019-11-10 stsp size_t base_bufsz = 0, accum_size = 0, delta_len;
1430 e0ab43e7 2018-03-16 stsp uint64_t max_size;
1431 e0ab43e7 2018-03-16 stsp int n = 0;
1433 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1434 e0ab43e7 2018-03-16 stsp *outlen = 0;
1436 dbdddfee 2021-06-23 naddy if (STAILQ_EMPTY(&deltas->entries))
1437 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
1439 d582f26c 2020-03-18 stsp err = got_pack_get_delta_chain_max_size(&max_size, deltas, pack);
1441 e0ab43e7 2018-03-16 stsp return err;
1442 e0ab43e7 2018-03-16 stsp accum_buf = malloc(max_size);
1443 e0ab43e7 2018-03-16 stsp if (accum_buf == NULL)
1444 638f9024 2019-05-13 stsp return got_error_from_errno("malloc");
1446 e0ab43e7 2018-03-16 stsp /* Deltas are ordered in ascending order. */
1447 dbdddfee 2021-06-23 naddy STAILQ_FOREACH(delta, &deltas->entries, entry) {
1448 ab2f42e7 2019-11-10 stsp int cached = 1;
1449 e0ab43e7 2018-03-16 stsp if (n == 0) {
1450 0c048b15 2018-04-27 stsp size_t delta_data_offset;
1452 e0ab43e7 2018-03-16 stsp /* Plain object types are the delta base. */
1453 e0ab43e7 2018-03-16 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1454 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1455 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1456 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1457 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1458 72eb3431 2018-04-01 stsp goto done;
1461 0c048b15 2018-04-27 stsp delta_data_offset = delta->offset + delta->tslen;
1462 0c048b15 2018-04-27 stsp if (delta_data_offset >= pack->filesize) {
1463 0c048b15 2018-04-27 stsp err = got_error(GOT_ERR_PACK_OFFSET);
1464 0c048b15 2018-04-27 stsp goto done;
1466 d7464085 2018-07-09 stsp if (pack->map) {
1467 d7464085 2018-07-09 stsp size_t mapoff = (size_t)delta_data_offset;
1468 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&base_buf,
1469 2e5a6fad 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->map,
1470 2e5a6fad 2020-03-18 stsp mapoff, pack->filesize - mapoff);
1472 d7464085 2018-07-09 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET)
1474 638f9024 2019-05-13 stsp err = got_error_from_errno("lseek");
1475 d7464085 2018-07-09 stsp goto done;
1477 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&base_buf,
1478 55fdd257 2020-03-18 stsp &base_bufsz, NULL, NULL, max_size,
1479 55fdd257 2020-03-18 stsp pack->fd);
1482 d7464085 2018-07-09 stsp goto done;
1487 ab2f42e7 2019-11-10 stsp got_delta_cache_get(&delta_buf, &delta_len,
1488 ab2f42e7 2019-11-10 stsp pack->delta_cache, delta->data_offset);
1489 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1490 ab2f42e7 2019-11-10 stsp cached = 0;
1491 9249e7e3 2022-05-12 thomas err = read_delta_data(&delta_buf, &delta_len, NULL,
1492 ab2f42e7 2019-11-10 stsp delta->data_offset, pack);
1494 ab2f42e7 2019-11-10 stsp goto done;
1495 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1496 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1497 ab2f42e7 2019-11-10 stsp if (err == NULL)
1498 ab2f42e7 2019-11-10 stsp cached = 1;
1499 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1500 ab2f42e7 2019-11-10 stsp free(delta_buf);
1501 ab2f42e7 2019-11-10 stsp goto done;
1504 34fca9c3 2018-11-11 stsp err = got_delta_apply_in_mem(base_buf, base_bufsz,
1505 42c69117 2019-11-10 stsp delta_buf, delta_len, accum_buf,
1506 34fca9c3 2018-11-11 stsp &accum_size, max_size);
1507 ab2f42e7 2019-11-10 stsp if (!cached)
1508 ab2f42e7 2019-11-10 stsp free(delta_buf);
1511 e0ab43e7 2018-03-16 stsp goto done;
1513 e0ab43e7 2018-03-16 stsp if (n < deltas->nentries) {
1514 e0ab43e7 2018-03-16 stsp /* Accumulated delta becomes the new base. */
1515 e0ab43e7 2018-03-16 stsp uint8_t *tmp = accum_buf;
1517 34fca9c3 2018-11-11 stsp * Base buffer switches roles with accumulation buffer.
1518 34fca9c3 2018-11-11 stsp * Ensure it can hold the largest result in the delta
1519 34fca9c3 2018-11-11 stsp * chain. Initial allocation might have been smaller.
1521 34fca9c3 2018-11-11 stsp if (base_bufsz < max_size) {
1522 34fca9c3 2018-11-11 stsp uint8_t *p;
1523 34fca9c3 2018-11-11 stsp p = reallocarray(base_buf, 1, max_size);
1524 34fca9c3 2018-11-11 stsp if (p == NULL) {
1525 638f9024 2019-05-13 stsp err = got_error_from_errno(
1526 230a42bd 2019-05-11 jcs "reallocarray");
1527 34fca9c3 2018-11-11 stsp goto done;
1529 34fca9c3 2018-11-11 stsp base_buf = p;
1530 34fca9c3 2018-11-11 stsp base_bufsz = max_size;
1532 e0ab43e7 2018-03-16 stsp accum_buf = base_buf;
1533 e0ab43e7 2018-03-16 stsp base_buf = tmp;
1538 e0ab43e7 2018-03-16 stsp free(base_buf);
1539 e0ab43e7 2018-03-16 stsp if (err) {
1540 e0ab43e7 2018-03-16 stsp free(accum_buf);
1541 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1542 e0ab43e7 2018-03-16 stsp *outlen = 0;
1544 e0ab43e7 2018-03-16 stsp *outbuf = accum_buf;
1545 e0ab43e7 2018-03-16 stsp *outlen = accum_size;
1547 efd2a263 2018-01-19 stsp return err;
1550 3ee5fc21 2018-01-17 stsp const struct got_error *
1551 24140570 2018-09-09 stsp got_packfile_extract_object(struct got_pack *pack, struct got_object *obj,
1552 3840f4c9 2018-09-12 stsp FILE *outfile, FILE *base_file, FILE *accum_file)
1554 3ee5fc21 2018-01-17 stsp const struct got_error *err = NULL;
1556 3ee5fc21 2018-01-17 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1557 3ee5fc21 2018-01-17 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1559 ef2bccd9 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1560 24140570 2018-09-09 stsp if (obj->pack_offset >= pack->filesize)
1561 24140570 2018-09-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1563 d7464085 2018-07-09 stsp if (pack->map) {
1564 d7464085 2018-07-09 stsp size_t mapoff = (size_t)obj->pack_offset;
1565 4788f1ce 2020-03-18 stsp err = got_inflate_to_file_mmap(&obj->size, NULL, NULL,
1566 4788f1ce 2020-03-18 stsp pack->map, mapoff, pack->filesize - mapoff,
1569 24140570 2018-09-09 stsp if (lseek(pack->fd, obj->pack_offset, SEEK_SET) == -1)
1570 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
1571 4788f1ce 2020-03-18 stsp err = got_inflate_to_file_fd(&obj->size, NULL, NULL,
1572 4788f1ce 2020-03-18 stsp pack->fd, outfile);
1575 4788f1ce 2020-03-18 stsp err = got_pack_dump_delta_chain_to_file(&obj->size,
1576 4788f1ce 2020-03-18 stsp &obj->deltas, pack, outfile, base_file, accum_file);
1578 a1fd68d8 2018-01-12 stsp return err;
1581 e0ab43e7 2018-03-16 stsp const struct got_error *
1582 e0ab43e7 2018-03-16 stsp got_packfile_extract_object_to_mem(uint8_t **buf, size_t *len,
1583 7e212e3d 2018-09-09 stsp struct got_object *obj, struct got_pack *pack)
1585 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1587 e0ab43e7 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1588 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1590 48095039 2018-09-09 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1591 7e212e3d 2018-09-09 stsp if (obj->pack_offset >= pack->filesize)
1592 7e212e3d 2018-09-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1593 d7464085 2018-07-09 stsp if (pack->map) {
1594 d7464085 2018-07-09 stsp size_t mapoff = (size_t)obj->pack_offset;
1595 2e5a6fad 2020-03-18 stsp err = got_inflate_to_mem_mmap(buf, len, NULL, NULL,
1596 2e5a6fad 2020-03-18 stsp pack->map, mapoff, pack->filesize - mapoff);
1598 7e212e3d 2018-09-09 stsp if (lseek(pack->fd, obj->pack_offset, SEEK_SET) == -1)
1599 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
1600 1e87a3c3 2020-03-18 stsp err = got_inflate_to_mem_fd(buf, len, NULL, NULL,
1601 55fdd257 2020-03-18 stsp obj->size, pack->fd);
1604 668a20f6 2020-03-18 stsp err = got_pack_dump_delta_chain_to_mem(buf, len, &obj->deltas,
1607 e0ab43e7 2018-03-16 stsp return err;
1610 9249e7e3 2022-05-12 thomas static const struct got_error *
1611 9249e7e3 2022-05-12 thomas read_raw_delta_data(uint8_t **delta_buf, size_t *delta_len,
1612 9249e7e3 2022-05-12 thomas size_t *delta_len_compressed, uint64_t *base_size, uint64_t *result_size,
1613 9249e7e3 2022-05-12 thomas off_t delta_data_offset, struct got_pack *pack, struct got_packidx *packidx)
1615 9249e7e3 2022-05-12 thomas const struct got_error *err = NULL;
1617 9249e7e3 2022-05-12 thomas /* Validate decompression and obtain the decompressed size. */
1618 9249e7e3 2022-05-12 thomas err = read_delta_data(delta_buf, delta_len, delta_len_compressed,
1619 9249e7e3 2022-05-12 thomas delta_data_offset, pack);
1620 9249e7e3 2022-05-12 thomas if (err)
1621 9249e7e3 2022-05-12 thomas return err;
1623 9249e7e3 2022-05-12 thomas /* Read delta base/result sizes from head of delta stream. */
1624 9249e7e3 2022-05-12 thomas err = got_delta_get_sizes(base_size, result_size,
1625 9249e7e3 2022-05-12 thomas *delta_buf, *delta_len);
1626 9249e7e3 2022-05-12 thomas if (err)
1627 9249e7e3 2022-05-12 thomas goto done;
1629 9249e7e3 2022-05-12 thomas /* Discard decompressed delta and read it again in compressed form. */
1630 9249e7e3 2022-05-12 thomas free(*delta_buf);
1631 9249e7e3 2022-05-12 thomas *delta_buf = malloc(*delta_len_compressed);
1632 9249e7e3 2022-05-12 thomas if (*delta_buf == NULL) {
1633 9249e7e3 2022-05-12 thomas err = got_error_from_errno("malloc");
1634 9249e7e3 2022-05-12 thomas goto done;
1636 9249e7e3 2022-05-12 thomas if (pack->map) {
1637 9249e7e3 2022-05-12 thomas if (delta_data_offset >= pack->filesize)
1638 9249e7e3 2022-05-12 thomas err = got_error(GOT_ERR_PACK_OFFSET);
1639 9249e7e3 2022-05-12 thomas memcpy(*delta_buf, pack->map + delta_data_offset,
1640 9249e7e3 2022-05-12 thomas *delta_len_compressed);
1641 9249e7e3 2022-05-12 thomas } else {
1642 9249e7e3 2022-05-12 thomas ssize_t n;
1643 9249e7e3 2022-05-12 thomas if (lseek(pack->fd, delta_data_offset, SEEK_SET) == -1) {
1644 9249e7e3 2022-05-12 thomas err = got_error_from_errno("lseek");
1645 9249e7e3 2022-05-12 thomas goto done;
1647 9249e7e3 2022-05-12 thomas n = read(pack->fd, *delta_buf, *delta_len_compressed);
1648 9249e7e3 2022-05-12 thomas if (n < 0) {
1649 9249e7e3 2022-05-12 thomas err = got_error_from_errno("read");
1650 9249e7e3 2022-05-12 thomas goto done;
1651 9249e7e3 2022-05-12 thomas } else if (n != *delta_len_compressed) {
1652 9249e7e3 2022-05-12 thomas err = got_error(GOT_ERR_IO);
1653 9249e7e3 2022-05-12 thomas goto done;
1657 9249e7e3 2022-05-12 thomas if (err) {
1658 9249e7e3 2022-05-12 thomas free(*delta_buf);
1659 9249e7e3 2022-05-12 thomas *delta_buf = NULL;
1660 9249e7e3 2022-05-12 thomas *delta_len = 0;
1661 9249e7e3 2022-05-12 thomas *delta_len_compressed = 0;
1662 9249e7e3 2022-05-12 thomas *base_size = 0;
1663 9249e7e3 2022-05-12 thomas *result_size = 0;
1665 9249e7e3 2022-05-12 thomas return err;
1668 f9c2e8e5 2022-02-13 thomas const struct got_error *
1669 f9c2e8e5 2022-02-13 thomas got_packfile_extract_raw_delta(uint8_t **delta_buf, size_t *delta_size,
1670 9249e7e3 2022-05-12 thomas size_t *delta_compressed_size, off_t *delta_offset, off_t *base_offset,
1671 9249e7e3 2022-05-12 thomas struct got_object_id *base_id, uint64_t *base_size, uint64_t *result_size,
1672 9249e7e3 2022-05-12 thomas struct got_pack *pack, struct got_packidx *packidx, int idx)
1674 f9c2e8e5 2022-02-13 thomas const struct got_error *err = NULL;
1675 f9c2e8e5 2022-02-13 thomas off_t offset;
1676 f9c2e8e5 2022-02-13 thomas uint8_t type;
1677 f9c2e8e5 2022-02-13 thomas uint64_t size;
1678 f9c2e8e5 2022-02-13 thomas size_t tslen, delta_hdrlen;
1679 9249e7e3 2022-05-12 thomas off_t delta_data_offset;
1681 f9c2e8e5 2022-02-13 thomas *delta_buf = NULL;
1682 f9c2e8e5 2022-02-13 thomas *delta_size = 0;
1683 9249e7e3 2022-05-12 thomas *delta_compressed_size = 0;
1684 f9c2e8e5 2022-02-13 thomas *delta_offset = 0;
1685 f9c2e8e5 2022-02-13 thomas *base_offset = 0;
1686 f9c2e8e5 2022-02-13 thomas *base_size = 0;
1687 f9c2e8e5 2022-02-13 thomas *result_size = 0;
1689 f9c2e8e5 2022-02-13 thomas offset = got_packidx_get_object_offset(packidx, idx);
1690 f9c2e8e5 2022-02-13 thomas if (offset == (uint64_t)-1)
1691 f9c2e8e5 2022-02-13 thomas return got_error(GOT_ERR_BAD_PACKIDX);
1693 f9c2e8e5 2022-02-13 thomas if (offset >= pack->filesize)
1694 f9c2e8e5 2022-02-13 thomas return got_error(GOT_ERR_PACK_OFFSET);
1696 f9c2e8e5 2022-02-13 thomas err = got_pack_parse_object_type_and_size(&type, &size, &tslen,
1697 f9c2e8e5 2022-02-13 thomas pack, offset);
1698 f9c2e8e5 2022-02-13 thomas if (err)
1699 f9c2e8e5 2022-02-13 thomas return err;
1701 f9c2e8e5 2022-02-13 thomas if (tslen + size < tslen || offset + size < size ||
1702 f9c2e8e5 2022-02-13 thomas tslen + offset < tslen)
1703 f9c2e8e5 2022-02-13 thomas return got_error(GOT_ERR_PACK_OFFSET);
1705 f9c2e8e5 2022-02-13 thomas switch (type) {
1706 f9c2e8e5 2022-02-13 thomas case GOT_OBJ_TYPE_OFFSET_DELTA:
1707 f9c2e8e5 2022-02-13 thomas err = got_pack_parse_offset_delta(base_offset, &delta_hdrlen,
1708 f9c2e8e5 2022-02-13 thomas pack, offset, tslen);
1709 f9c2e8e5 2022-02-13 thomas if (err)
1710 f9c2e8e5 2022-02-13 thomas return err;
1712 f9c2e8e5 2022-02-13 thomas case GOT_OBJ_TYPE_REF_DELTA:
1713 f9c2e8e5 2022-02-13 thomas err = got_pack_parse_ref_delta(base_id, pack, offset, tslen);
1714 f9c2e8e5 2022-02-13 thomas if (err)
1715 f9c2e8e5 2022-02-13 thomas return err;
1716 f9c2e8e5 2022-02-13 thomas delta_hdrlen = SHA1_DIGEST_LENGTH;
1718 f9c2e8e5 2022-02-13 thomas default:
1719 f9c2e8e5 2022-02-13 thomas return got_error_fmt(GOT_ERR_OBJ_TYPE,
1720 f9c2e8e5 2022-02-13 thomas "non-delta object type %d found at offset %llu",
1721 f9c2e8e5 2022-02-13 thomas type, offset);
1724 f9c2e8e5 2022-02-13 thomas if (tslen + delta_hdrlen < delta_hdrlen ||
1725 f9c2e8e5 2022-02-13 thomas offset + delta_hdrlen < delta_hdrlen)
1726 f9c2e8e5 2022-02-13 thomas return got_error(GOT_ERR_BAD_DELTA);
1728 9249e7e3 2022-05-12 thomas delta_data_offset = offset + tslen + delta_hdrlen;
1729 9249e7e3 2022-05-12 thomas err = read_raw_delta_data(delta_buf, delta_size, delta_compressed_size,
1730 9249e7e3 2022-05-12 thomas base_size, result_size, delta_data_offset, pack, packidx);
1731 f9c2e8e5 2022-02-13 thomas if (err)
1732 f9c2e8e5 2022-02-13 thomas return err;
1734 f9c2e8e5 2022-02-13 thomas if (*delta_size != size) {
1735 f9c2e8e5 2022-02-13 thomas err = got_error(GOT_ERR_BAD_DELTA);
1736 f9c2e8e5 2022-02-13 thomas goto done;
1739 f9c2e8e5 2022-02-13 thomas *delta_offset = offset;
1741 f9c2e8e5 2022-02-13 thomas if (err) {
1742 f9c2e8e5 2022-02-13 thomas free(*delta_buf);
1743 f9c2e8e5 2022-02-13 thomas *delta_buf = NULL;
1744 9249e7e3 2022-05-12 thomas *delta_size = 0;
1745 9249e7e3 2022-05-12 thomas *delta_compressed_size = 0;
1746 9249e7e3 2022-05-12 thomas *delta_offset = 0;
1747 9249e7e3 2022-05-12 thomas *base_offset = 0;
1748 9249e7e3 2022-05-12 thomas *base_size = 0;
1749 9249e7e3 2022-05-12 thomas *result_size = 0;
1751 f9c2e8e5 2022-02-13 thomas return err;