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 a1fd68d8 2018-01-12 stsp #include <sys/queue.h>
20 876c234b 2018-09-10 stsp #include <sys/uio.h>
21 57b35b75 2018-06-22 stsp #include <sys/mman.h>
23 7e656b93 2018-03-17 stsp #include <fcntl.h>
24 a1fd68d8 2018-01-12 stsp #include <errno.h>
25 0a0a3048 2018-01-10 stsp #include <stdio.h>
26 a1fd68d8 2018-01-12 stsp #include <stdint.h>
27 0a0a3048 2018-01-10 stsp #include <stdlib.h>
28 0a0a3048 2018-01-10 stsp #include <string.h>
29 0a0a3048 2018-01-10 stsp #include <limits.h>
30 0a0a3048 2018-01-10 stsp #include <sha1.h>
31 0a0a3048 2018-01-10 stsp #include <endian.h>
32 81a12da5 2020-09-09 naddy #include <unistd.h>
33 a1fd68d8 2018-01-12 stsp #include <zlib.h>
34 876c234b 2018-09-10 stsp #include <imsg.h>
36 0a0a3048 2018-01-10 stsp #include "got_error.h"
37 a1fd68d8 2018-01-12 stsp #include "got_object.h"
38 511a516b 2018-05-19 stsp #include "got_opentemp.h"
39 324d37e7 2019-05-11 stsp #include "got_path.h"
41 718b3ab0 2018-03-17 stsp #include "got_lib_sha1.h"
42 718b3ab0 2018-03-17 stsp #include "got_lib_delta.h"
43 ab2f42e7 2019-11-10 stsp #include "got_lib_delta_cache.h"
44 63581804 2018-07-09 stsp #include "got_lib_inflate.h"
45 718b3ab0 2018-03-17 stsp #include "got_lib_object.h"
46 dd88155e 2019-06-29 stsp #include "got_lib_object_parse.h"
47 876c234b 2018-09-10 stsp #include "got_lib_privsep.h"
48 15a94983 2018-12-23 stsp #include "got_lib_pack.h"
50 79b11c62 2018-03-09 stsp #ifndef nitems
51 79b11c62 2018-03-09 stsp #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
55 a1fd68d8 2018-01-12 stsp #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
58 0a0a3048 2018-01-10 stsp static const struct got_error *
59 0a0a3048 2018-01-10 stsp verify_fanout_table(uint32_t *fanout_table)
63 0a0a3048 2018-01-10 stsp for (i = 0; i < 0xff - 1; i++) {
64 a1fd68d8 2018-01-12 stsp if (be32toh(fanout_table[i]) > be32toh(fanout_table[i + 1]))
65 0a0a3048 2018-01-10 stsp return got_error(GOT_ERR_BAD_PACKIDX);
68 0a0a3048 2018-01-10 stsp return NULL;
71 1510f469 2018-09-09 stsp const struct got_error *
72 c3564dfa 2021-07-15 stsp got_packidx_init_hdr(struct got_packidx *p, int verify, off_t packfile_size)
74 0a0a3048 2018-01-10 stsp const struct got_error *err = NULL;
75 817c5a18 2018-09-09 stsp struct got_packidx_v2_hdr *h;
76 0ebaf008 2018-01-10 stsp SHA1_CTX ctx;
77 0ebaf008 2018-01-10 stsp uint8_t sha1[SHA1_DIGEST_LENGTH];
78 817c5a18 2018-09-09 stsp size_t nobj, len_fanout, len_ids, offset, remain;
82 0ebaf008 2018-01-10 stsp SHA1Init(&ctx);
84 57b35b75 2018-06-22 stsp h = &p->hdr;
86 57b35b75 2018-06-22 stsp remain = p->len;
88 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->magic)) {
89 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
93 fc79a48d 2018-07-09 stsp h->magic = (uint32_t *)(p->map + offset);
95 fc79a48d 2018-07-09 stsp h->magic = malloc(sizeof(*h->magic));
96 fc79a48d 2018-07-09 stsp if (h->magic == NULL) {
97 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
100 fc79a48d 2018-07-09 stsp n = read(p->fd, h->magic, sizeof(*h->magic));
101 b1317e77 2019-09-22 stsp if (n < 0) {
102 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
104 b1317e77 2019-09-22 stsp } else if (n != sizeof(*h->magic)) {
105 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
109 ac62b712 2021-03-30 stsp if (*h->magic != htobe32(GOT_PACKIDX_V2_MAGIC)) {
110 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
113 57b35b75 2018-06-22 stsp offset += sizeof(*h->magic);
114 57b35b75 2018-06-22 stsp remain -= sizeof(*h->magic);
116 0cb74cf4 2018-07-08 stsp if (verify)
117 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->magic, sizeof(*h->magic));
119 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->version)) {
120 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
123 fc79a48d 2018-07-09 stsp if (p->map)
124 fc79a48d 2018-07-09 stsp h->version = (uint32_t *)(p->map + offset);
126 fc79a48d 2018-07-09 stsp h->version = malloc(sizeof(*h->version));
127 fc79a48d 2018-07-09 stsp if (h->version == NULL) {
128 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
131 fc79a48d 2018-07-09 stsp n = read(p->fd, h->version, sizeof(*h->version));
132 c6368c2e 2019-10-11 stsp if (n < 0) {
133 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
135 c6368c2e 2019-10-11 stsp } else if (n != sizeof(*h->version)) {
136 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
140 ac62b712 2021-03-30 stsp if (*h->version != htobe32(GOT_PACKIDX_VERSION)) {
141 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
144 57b35b75 2018-06-22 stsp offset += sizeof(*h->version);
145 57b35b75 2018-06-22 stsp remain -= sizeof(*h->version);
147 0cb74cf4 2018-07-08 stsp if (verify)
148 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->version, sizeof(*h->version));
150 57b35b75 2018-06-22 stsp len_fanout =
151 57b35b75 2018-06-22 stsp sizeof(*h->fanout_table) * GOT_PACKIDX_V2_FANOUT_TABLE_ITEMS;
152 57b35b75 2018-06-22 stsp if (remain < len_fanout) {
153 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
156 fc79a48d 2018-07-09 stsp if (p->map)
157 fc79a48d 2018-07-09 stsp h->fanout_table = (uint32_t *)(p->map + offset);
159 fc79a48d 2018-07-09 stsp h->fanout_table = malloc(len_fanout);
160 fc79a48d 2018-07-09 stsp if (h->fanout_table == NULL) {
161 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
164 fc79a48d 2018-07-09 stsp n = read(p->fd, h->fanout_table, len_fanout);
165 c6368c2e 2019-10-11 stsp if (n < 0) {
166 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
168 c6368c2e 2019-10-11 stsp } else if (n != len_fanout) {
169 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
173 c8262310 2018-06-04 stsp err = verify_fanout_table(h->fanout_table);
176 0cb74cf4 2018-07-08 stsp if (verify)
177 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->fanout_table, len_fanout);
178 57b35b75 2018-06-22 stsp offset += len_fanout;
179 57b35b75 2018-06-22 stsp remain -= len_fanout;
181 78fb0967 2020-09-09 naddy nobj = be32toh(h->fanout_table[0xff]);
182 57b35b75 2018-06-22 stsp len_ids = nobj * sizeof(*h->sorted_ids);
183 57b35b75 2018-06-22 stsp if (len_ids <= nobj || len_ids > remain) {
184 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
187 fc79a48d 2018-07-09 stsp if (p->map)
188 fc79a48d 2018-07-09 stsp h->sorted_ids =
189 fc79a48d 2018-07-09 stsp (struct got_packidx_object_id *)((uint8_t*)(p->map + offset));
191 fc79a48d 2018-07-09 stsp h->sorted_ids = malloc(len_ids);
192 fc79a48d 2018-07-09 stsp if (h->sorted_ids == NULL) {
193 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
196 fc79a48d 2018-07-09 stsp n = read(p->fd, h->sorted_ids, len_ids);
198 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
199 faaa1c0f 2018-09-15 stsp else if (n != len_ids) {
200 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
204 0cb74cf4 2018-07-08 stsp if (verify)
205 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->sorted_ids, len_ids);
206 57b35b75 2018-06-22 stsp offset += len_ids;
207 57b35b75 2018-06-22 stsp remain -= len_ids;
209 57b35b75 2018-06-22 stsp if (remain < nobj * sizeof(*h->crc32)) {
210 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
213 fc79a48d 2018-07-09 stsp if (p->map)
214 fc79a48d 2018-07-09 stsp h->crc32 = (uint32_t *)((uint8_t*)(p->map + offset));
216 fc79a48d 2018-07-09 stsp h->crc32 = malloc(nobj * sizeof(*h->crc32));
217 fc79a48d 2018-07-09 stsp if (h->crc32 == NULL) {
218 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
221 fc79a48d 2018-07-09 stsp n = read(p->fd, h->crc32, nobj * sizeof(*h->crc32));
223 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
224 faaa1c0f 2018-09-15 stsp else if (n != nobj * sizeof(*h->crc32)) {
225 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
229 0cb74cf4 2018-07-08 stsp if (verify)
230 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->crc32, nobj * sizeof(*h->crc32));
231 57b35b75 2018-06-22 stsp remain -= nobj * sizeof(*h->crc32);
232 57b35b75 2018-06-22 stsp offset += nobj * sizeof(*h->crc32);
234 57b35b75 2018-06-22 stsp if (remain < nobj * sizeof(*h->offsets)) {
235 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
238 fc79a48d 2018-07-09 stsp if (p->map)
239 fc79a48d 2018-07-09 stsp h->offsets = (uint32_t *)((uint8_t*)(p->map + offset));
241 fc79a48d 2018-07-09 stsp h->offsets = malloc(nobj * sizeof(*h->offsets));
242 fc79a48d 2018-07-09 stsp if (h->offsets == NULL) {
243 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
246 fc79a48d 2018-07-09 stsp n = read(p->fd, h->offsets, nobj * sizeof(*h->offsets));
248 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
249 faaa1c0f 2018-09-15 stsp else if (n != nobj * sizeof(*h->offsets)) {
250 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
254 0cb74cf4 2018-07-08 stsp if (verify)
255 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->offsets,
256 0cb74cf4 2018-07-08 stsp nobj * sizeof(*h->offsets));
257 57b35b75 2018-06-22 stsp remain -= nobj * sizeof(*h->offsets);
258 57b35b75 2018-06-22 stsp offset += nobj * sizeof(*h->offsets);
260 0a0a3048 2018-01-10 stsp /* Large file offsets are contained only in files > 2GB. */
261 c3564dfa 2021-07-15 stsp if (verify || packfile_size > 0x7fffffff) {
262 c3564dfa 2021-07-15 stsp for (i = 0; i < nobj; i++) {
263 c3564dfa 2021-07-15 stsp uint32_t o = h->offsets[i];
264 c3564dfa 2021-07-15 stsp if (o & htobe32(GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX))
265 c3564dfa 2021-07-15 stsp p->nlargeobj++;
268 5e6be232 2019-11-08 stsp if (p->nlargeobj == 0)
269 0a0a3048 2018-01-10 stsp goto checksum;
270 c3564dfa 2021-07-15 stsp else if (packfile_size <= 0x7fffffff) {
271 c3564dfa 2021-07-15 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
275 5e6be232 2019-11-08 stsp if (remain < p->nlargeobj * sizeof(*h->large_offsets)) {
276 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
279 fc79a48d 2018-07-09 stsp if (p->map)
280 fc79a48d 2018-07-09 stsp h->large_offsets = (uint64_t *)((uint8_t*)(p->map + offset));
282 5e6be232 2019-11-08 stsp h->large_offsets = malloc(p->nlargeobj *
283 5e6be232 2019-11-08 stsp sizeof(*h->large_offsets));
284 de30857e 2019-08-23 stsp if (h->large_offsets == NULL) {
285 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
288 fc79a48d 2018-07-09 stsp n = read(p->fd, h->large_offsets,
289 5e6be232 2019-11-08 stsp p->nlargeobj * sizeof(*h->large_offsets));
291 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
292 5e6be232 2019-11-08 stsp else if (n != p->nlargeobj * sizeof(*h->large_offsets)) {
293 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
297 0cb74cf4 2018-07-08 stsp if (verify)
298 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t*)h->large_offsets,
299 5e6be232 2019-11-08 stsp p->nlargeobj * sizeof(*h->large_offsets));
300 5e6be232 2019-11-08 stsp remain -= p->nlargeobj * sizeof(*h->large_offsets);
301 5e6be232 2019-11-08 stsp offset += p->nlargeobj * sizeof(*h->large_offsets);
304 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->trailer)) {
305 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
308 fc79a48d 2018-07-09 stsp if (p->map)
309 fc79a48d 2018-07-09 stsp h->trailer =
310 fc79a48d 2018-07-09 stsp (struct got_packidx_trailer *)((uint8_t*)(p->map + offset));
312 fc79a48d 2018-07-09 stsp h->trailer = malloc(sizeof(*h->trailer));
313 fc79a48d 2018-07-09 stsp if (h->trailer == NULL) {
314 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
317 fc79a48d 2018-07-09 stsp n = read(p->fd, h->trailer, sizeof(*h->trailer));
319 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
320 faaa1c0f 2018-09-15 stsp else if (n != sizeof(*h->trailer)) {
321 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
325 0cb74cf4 2018-07-08 stsp if (verify) {
326 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, h->trailer->packfile_sha1, SHA1_DIGEST_LENGTH);
327 0cb74cf4 2018-07-08 stsp SHA1Final(sha1, &ctx);
328 0cb74cf4 2018-07-08 stsp if (memcmp(h->trailer->packidx_sha1, sha1,
329 0cb74cf4 2018-07-08 stsp SHA1_DIGEST_LENGTH) != 0)
330 0cb74cf4 2018-07-08 stsp err = got_error(GOT_ERR_PACKIDX_CSUM);
333 817c5a18 2018-09-09 stsp return err;
336 817c5a18 2018-09-09 stsp const struct got_error *
337 6d5a9006 2020-12-16 yzhong got_packidx_open(struct got_packidx **packidx,
338 6d5a9006 2020-12-16 yzhong int dir_fd, const char *relpath, int verify)
340 817c5a18 2018-09-09 stsp const struct got_error *err = NULL;
341 1124fe40 2021-07-07 stsp struct got_packidx *p = NULL;
342 1124fe40 2021-07-07 stsp char *pack_relpath;
343 c3564dfa 2021-07-15 stsp struct stat idx_sb, pack_sb;
345 817c5a18 2018-09-09 stsp *packidx = NULL;
347 1124fe40 2021-07-07 stsp err = got_packidx_get_packfile_path(&pack_relpath, relpath);
349 1124fe40 2021-07-07 stsp return err;
352 1124fe40 2021-07-07 stsp * Ensure that a corresponding pack file exists.
353 1124fe40 2021-07-07 stsp * Some Git repositories have this problem. Git seems to ignore
354 1124fe40 2021-07-07 stsp * the existence of lonely pack index files but we do not.
356 c3564dfa 2021-07-15 stsp if (fstatat(dir_fd, pack_relpath, &pack_sb, 0) == -1) {
357 1124fe40 2021-07-07 stsp if (errno == ENOENT) {
358 1124fe40 2021-07-07 stsp err = got_error_fmt(GOT_ERR_LONELY_PACKIDX,
359 1124fe40 2021-07-07 stsp "%s", relpath);
361 1124fe40 2021-07-07 stsp err = got_error_from_errno2("fstatat", pack_relpath);
365 817c5a18 2018-09-09 stsp p = calloc(1, sizeof(*p));
366 1124fe40 2021-07-07 stsp if (p == NULL) {
367 1124fe40 2021-07-07 stsp err = got_error_from_errno("calloc");
371 e7ae0baf 2021-12-31 stsp p->fd = openat(dir_fd, relpath, O_RDONLY | O_NOFOLLOW | O_CLOEXEC);
372 6772cf22 2019-08-28 hiltjo if (p->fd == -1) {
373 6d5a9006 2020-12-16 yzhong err = got_error_from_errno2("openat", relpath);
377 c3564dfa 2021-07-15 stsp if (fstat(p->fd, &idx_sb) != 0) {
378 6d5a9006 2020-12-16 yzhong err = got_error_from_errno2("fstat", relpath);
381 c3564dfa 2021-07-15 stsp p->len = idx_sb.st_size;
382 817c5a18 2018-09-09 stsp if (p->len < sizeof(p->hdr)) {
383 817c5a18 2018-09-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
387 6d5a9006 2020-12-16 yzhong p->path_packidx = strdup(relpath);
388 817c5a18 2018-09-09 stsp if (p->path_packidx == NULL) {
389 638f9024 2019-05-13 stsp err = got_error_from_errno("strdup");
393 817c5a18 2018-09-09 stsp #ifndef GOT_PACK_NO_MMAP
394 817c5a18 2018-09-09 stsp p->map = mmap(NULL, p->len, PROT_READ, MAP_PRIVATE, p->fd, 0);
395 3a11398b 2019-02-21 stsp if (p->map == MAP_FAILED) {
396 3a11398b 2019-02-21 stsp if (errno != ENOMEM) {
397 638f9024 2019-05-13 stsp err = got_error_from_errno("mmap");
400 817c5a18 2018-09-09 stsp p->map = NULL; /* fall back to read(2) */
404 c3564dfa 2021-07-15 stsp err = got_packidx_init_hdr(p, verify, pack_sb.st_size);
408 1124fe40 2021-07-07 stsp got_packidx_close(p);
410 0a0a3048 2018-01-10 stsp *packidx = p;
411 1124fe40 2021-07-07 stsp free(pack_relpath);
412 0a0a3048 2018-01-10 stsp return err;
415 57b35b75 2018-06-22 stsp const struct got_error *
416 6fd11751 2018-06-04 stsp got_packidx_close(struct got_packidx *packidx)
418 57b35b75 2018-06-22 stsp const struct got_error *err = NULL;
420 6fd11751 2018-06-04 stsp free(packidx->path_packidx);
421 fc79a48d 2018-07-09 stsp if (packidx->map) {
422 57b35b75 2018-06-22 stsp if (munmap(packidx->map, packidx->len) == -1)
423 638f9024 2019-05-13 stsp err = got_error_from_errno("munmap");
425 fc79a48d 2018-07-09 stsp free(packidx->hdr.magic);
426 fc79a48d 2018-07-09 stsp free(packidx->hdr.version);
427 fc79a48d 2018-07-09 stsp free(packidx->hdr.fanout_table);
428 fc79a48d 2018-07-09 stsp free(packidx->hdr.sorted_ids);
429 fc79a48d 2018-07-09 stsp free(packidx->hdr.crc32);
430 fc79a48d 2018-07-09 stsp free(packidx->hdr.offsets);
431 fc79a48d 2018-07-09 stsp free(packidx->hdr.large_offsets);
432 fc79a48d 2018-07-09 stsp free(packidx->hdr.trailer);
434 08578a35 2021-01-22 stsp if (close(packidx->fd) == -1 && err == NULL)
435 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
436 0a0a3048 2018-01-10 stsp free(packidx);
438 57b35b75 2018-06-22 stsp return err;
441 509c9973 2021-04-10 stsp const struct got_error *
442 aea75d87 2021-07-06 stsp got_packidx_get_packfile_path(char **path_packfile, const char *path_packidx)
444 509c9973 2021-04-10 stsp size_t size;
446 509c9973 2021-04-10 stsp /* Packfile path contains ".pack" instead of ".idx", so add one byte. */
447 aea75d87 2021-07-06 stsp size = strlen(path_packidx) + 2;
448 509c9973 2021-04-10 stsp if (size < GOT_PACKFILE_NAMELEN + 1)
449 aea75d87 2021-07-06 stsp return got_error_path(path_packidx, GOT_ERR_BAD_PATH);
451 509c9973 2021-04-10 stsp *path_packfile = malloc(size);
452 509c9973 2021-04-10 stsp if (*path_packfile == NULL)
453 509c9973 2021-04-10 stsp return got_error_from_errno("malloc");
455 509c9973 2021-04-10 stsp /* Copy up to and excluding ".idx". */
456 aea75d87 2021-07-06 stsp if (strlcpy(*path_packfile, path_packidx,
457 509c9973 2021-04-10 stsp size - strlen(GOT_PACKIDX_SUFFIX) - 1) >= size)
458 509c9973 2021-04-10 stsp return got_error(GOT_ERR_NO_SPACE);
460 509c9973 2021-04-10 stsp if (strlcat(*path_packfile, GOT_PACKFILE_SUFFIX, size) >= size)
461 509c9973 2021-04-10 stsp return got_error(GOT_ERR_NO_SPACE);
463 509c9973 2021-04-10 stsp return NULL;
467 02828bfd 2021-06-22 stsp got_packidx_get_object_offset(struct got_packidx *packidx, int idx)
469 78fb0967 2020-09-09 naddy uint32_t offset = be32toh(packidx->hdr.offsets[idx]);
470 a1fd68d8 2018-01-12 stsp if (offset & GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX) {
471 a1fd68d8 2018-01-12 stsp uint64_t loffset;
472 a1fd68d8 2018-01-12 stsp idx = offset & GOT_PACKIDX_OFFSET_VAL_MASK;
473 5e6be232 2019-11-08 stsp if (idx < 0 || idx >= packidx->nlargeobj ||
474 6fd11751 2018-06-04 stsp packidx->hdr.large_offsets == NULL)
476 78fb0967 2020-09-09 naddy loffset = be64toh(packidx->hdr.large_offsets[idx]);
477 a1fd68d8 2018-01-12 stsp return (loffset > INT64_MAX ? -1 : (off_t)loffset);
479 a1fd68d8 2018-01-12 stsp return (off_t)(offset & GOT_PACKIDX_OFFSET_VAL_MASK);
483 c0df5966 2021-12-31 stsp got_packidx_get_object_idx(struct got_packidx *packidx,
484 c0df5966 2021-12-31 stsp struct got_object_id *id)
486 00927983 2020-04-19 stsp u_int8_t id0 = id->sha1[0];
487 78fb0967 2020-09-09 naddy uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
488 40aeb19c 2018-06-22 stsp int left = 0, right = totobj - 1;
490 a1fd68d8 2018-01-12 stsp if (id0 > 0)
491 78fb0967 2020-09-09 naddy left = be32toh(packidx->hdr.fanout_table[id0 - 1]);
493 40aeb19c 2018-06-22 stsp while (left <= right) {
494 57b35b75 2018-06-22 stsp struct got_packidx_object_id *oid;
495 40aeb19c 2018-06-22 stsp int i, cmp;
497 40aeb19c 2018-06-22 stsp i = ((left + right) / 2);
498 40aeb19c 2018-06-22 stsp oid = &packidx->hdr.sorted_ids[i];
499 00927983 2020-04-19 stsp cmp = memcmp(id->sha1, oid->sha1, SHA1_DIGEST_LENGTH);
500 16dcbf91 2018-04-01 stsp if (cmp == 0)
502 40aeb19c 2018-06-22 stsp else if (cmp > 0)
503 40aeb19c 2018-06-22 stsp left = i + 1;
504 40aeb19c 2018-06-22 stsp else if (cmp < 0)
505 40aeb19c 2018-06-22 stsp right = i - 1;
511 876c234b 2018-09-10 stsp const struct got_error *
512 dd88155e 2019-06-29 stsp got_packidx_match_id_str_prefix(struct got_object_id_queue *matched_ids,
513 4277420a 2019-06-29 stsp struct got_packidx *packidx, const char *id_str_prefix)
515 dd88155e 2019-06-29 stsp const struct got_error *err = NULL;
516 4277420a 2019-06-29 stsp u_int8_t id0;
517 78fb0967 2020-09-09 naddy uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
518 4277420a 2019-06-29 stsp char hex[3];
519 4277420a 2019-06-29 stsp size_t prefix_len = strlen(id_str_prefix);
520 e09a504c 2019-06-28 stsp struct got_packidx_object_id *oid;
521 404bde06 2022-01-03 stsp uint32_t i = 0;
523 dbdddfee 2021-06-23 naddy STAILQ_INIT(matched_ids);
525 4277420a 2019-06-29 stsp if (prefix_len < 2)
526 6dd1ece6 2019-11-10 stsp return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
528 4277420a 2019-06-29 stsp hex[0] = id_str_prefix[0];
529 4277420a 2019-06-29 stsp hex[1] = id_str_prefix[1];
530 4277420a 2019-06-29 stsp hex[2] = '\0';
531 4277420a 2019-06-29 stsp if (!got_parse_xdigit(&id0, hex))
532 6dd1ece6 2019-11-10 stsp return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
534 404bde06 2022-01-03 stsp if (id0 > 0)
535 404bde06 2022-01-03 stsp i = be32toh(packidx->hdr.fanout_table[id0 - 1]);
536 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[i];
537 4277420a 2019-06-29 stsp while (i < totobj && oid->sha1[0] == id0) {
538 4277420a 2019-06-29 stsp char id_str[SHA1_DIGEST_STRING_LENGTH];
539 dd88155e 2019-06-29 stsp struct got_object_qid *qid;
542 4277420a 2019-06-29 stsp if (!got_sha1_digest_to_str(oid->sha1, id_str, sizeof(id_str)))
543 4277420a 2019-06-29 stsp return got_error(GOT_ERR_NO_SPACE);
545 4277420a 2019-06-29 stsp cmp = strncmp(id_str, id_str_prefix, prefix_len);
546 4277420a 2019-06-29 stsp if (cmp < 0) {
547 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[++i];
549 4277420a 2019-06-29 stsp } else if (cmp > 0)
552 dd88155e 2019-06-29 stsp err = got_object_qid_alloc_partial(&qid);
555 dd88155e 2019-06-29 stsp memcpy(qid->id->sha1, oid->sha1, SHA1_DIGEST_LENGTH);
556 dbdddfee 2021-06-23 naddy STAILQ_INSERT_TAIL(matched_ids, qid, entry);
558 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[++i];
562 0adc7bcc 2019-06-29 stsp got_object_id_queue_free(matched_ids);
563 dd88155e 2019-06-29 stsp return err;
566 b4f37570 2021-06-19 stsp static const struct got_error *
567 b4f37570 2021-06-19 stsp pack_stop_privsep_child(struct got_pack *pack)
569 96732e0b 2018-11-11 stsp const struct got_error *err = NULL;
571 876c234b 2018-09-10 stsp if (pack->privsep_child == NULL)
572 876c234b 2018-09-10 stsp return NULL;
574 876c234b 2018-09-10 stsp err = got_privsep_send_stop(pack->privsep_child->imsg_fd);
576 96732e0b 2018-11-11 stsp return err;
577 96732e0b 2018-11-11 stsp err = got_privsep_wait_for_child(pack->privsep_child->pid);
578 08578a35 2021-01-22 stsp if (close(pack->privsep_child->imsg_fd) == -1 && err == NULL)
579 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
580 cc2a8ef4 2021-06-19 tracey imsg_clear(pack->privsep_child->ibuf);
581 cc2a8ef4 2021-06-19 tracey free(pack->privsep_child->ibuf);
582 876c234b 2018-09-10 stsp free(pack->privsep_child);
583 876c234b 2018-09-10 stsp pack->privsep_child = NULL;
584 876c234b 2018-09-10 stsp return err;
587 d7464085 2018-07-09 stsp const struct got_error *
588 7e656b93 2018-03-17 stsp got_pack_close(struct got_pack *pack)
590 d7464085 2018-07-09 stsp const struct got_error *err = NULL;
592 b4f37570 2021-06-19 stsp err = pack_stop_privsep_child(pack);
593 876c234b 2018-09-10 stsp if (pack->map && munmap(pack->map, pack->filesize) == -1 && !err)
594 638f9024 2019-05-13 stsp err = got_error_from_errno("munmap");
595 08578a35 2021-01-22 stsp if (pack->fd != -1 && close(pack->fd) == -1 && err == NULL)
596 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
597 8b2180d4 2018-04-26 stsp pack->fd = -1;
598 4589e373 2018-03-17 stsp free(pack->path_packfile);
599 4589e373 2018-03-17 stsp pack->path_packfile = NULL;
600 4589e373 2018-03-17 stsp pack->filesize = 0;
601 ab2f42e7 2019-11-10 stsp if (pack->delta_cache) {
602 ab2f42e7 2019-11-10 stsp got_delta_cache_free(pack->delta_cache);
603 ab2f42e7 2019-11-10 stsp pack->delta_cache = NULL;
606 c7fe698a 2018-01-23 stsp return err;
609 668a20f6 2020-03-18 stsp const struct got_error *
610 668a20f6 2020-03-18 stsp got_pack_parse_object_type_and_size(uint8_t *type, uint64_t *size, size_t *len,
611 d7464085 2018-07-09 stsp struct got_pack *pack, off_t offset)
613 a487c1d0 2018-01-14 stsp uint8_t t = 0;
614 a487c1d0 2018-01-14 stsp uint64_t s = 0;
615 a487c1d0 2018-01-14 stsp uint8_t sizeN;
616 d7464085 2018-07-09 stsp size_t mapoff = 0;
621 d7464085 2018-07-09 stsp if (offset >= pack->filesize)
622 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
624 d7464085 2018-07-09 stsp if (pack->map) {
625 d7464085 2018-07-09 stsp mapoff = (size_t)offset;
627 d7464085 2018-07-09 stsp if (lseek(pack->fd, offset, SEEK_SET) == -1)
628 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
632 a1fd68d8 2018-01-12 stsp /* We do not support size values which don't fit in 64 bit. */
634 a487c1d0 2018-01-14 stsp return got_error(GOT_ERR_NO_SPACE);
636 d7464085 2018-07-09 stsp if (pack->map) {
637 3976db15 2022-01-10 stsp if (mapoff + sizeof(sizeN) >= pack->filesize)
638 3976db15 2022-01-10 stsp return got_error(GOT_ERR_BAD_PACKFILE);
639 d7464085 2018-07-09 stsp sizeN = *(pack->map + mapoff);
640 d7464085 2018-07-09 stsp mapoff += sizeof(sizeN);
642 d7464085 2018-07-09 stsp ssize_t n = read(pack->fd, &sizeN, sizeof(sizeN));
644 638f9024 2019-05-13 stsp return got_error_from_errno("read");
645 d7464085 2018-07-09 stsp if (n != sizeof(sizeN))
646 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
648 d7464085 2018-07-09 stsp *len += sizeof(sizeN);
650 a1fd68d8 2018-01-12 stsp if (i == 0) {
651 a487c1d0 2018-01-14 stsp t = (sizeN & GOT_PACK_OBJ_SIZE0_TYPE_MASK) >>
652 a1fd68d8 2018-01-12 stsp GOT_PACK_OBJ_SIZE0_TYPE_MASK_SHIFT;
653 a487c1d0 2018-01-14 stsp s = (sizeN & GOT_PACK_OBJ_SIZE0_VAL_MASK);
655 a1fd68d8 2018-01-12 stsp size_t shift = 4 + 7 * (i - 1);
656 a487c1d0 2018-01-14 stsp s |= ((sizeN & GOT_PACK_OBJ_SIZE_VAL_MASK) << shift);
659 a1fd68d8 2018-01-12 stsp } while (sizeN & GOT_PACK_OBJ_SIZE_MORE);
663 a487c1d0 2018-01-14 stsp return NULL;
666 a1fd68d8 2018-01-12 stsp static const struct got_error *
667 5f25cc85 2019-11-26 stsp open_plain_object(struct got_object **obj, struct got_object_id *id,
668 5f25cc85 2019-11-26 stsp uint8_t type, off_t offset, size_t size, int idx)
670 6ccb713b 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
671 6ccb713b 2018-01-19 stsp if (*obj == NULL)
672 638f9024 2019-05-13 stsp return got_error_from_errno("calloc");
674 6ccb713b 2018-01-19 stsp (*obj)->type = type;
675 6ccb713b 2018-01-19 stsp (*obj)->flags = GOT_OBJ_FLAG_PACKED;
676 c59b3346 2018-09-11 stsp (*obj)->pack_idx = idx;
677 6ccb713b 2018-01-19 stsp (*obj)->hdrlen = 0;
678 6ccb713b 2018-01-19 stsp (*obj)->size = size;
679 106807b4 2018-09-15 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
680 6ccb713b 2018-01-19 stsp (*obj)->pack_offset = offset;
682 b107e67f 2018-01-19 stsp return NULL;
685 b107e67f 2018-01-19 stsp static const struct got_error *
686 d7464085 2018-07-09 stsp parse_negative_offset(int64_t *offset, size_t *len, struct got_pack *pack,
687 d7464085 2018-07-09 stsp off_t delta_offset)
689 b107e67f 2018-01-19 stsp int64_t o = 0;
690 b107e67f 2018-01-19 stsp uint8_t offN;
693 a0de39f3 2019-08-09 stsp *offset = 0;
697 b107e67f 2018-01-19 stsp /* We do not support offset values which don't fit in 64 bit. */
699 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_NO_SPACE);
701 d7464085 2018-07-09 stsp if (pack->map) {
702 d7464085 2018-07-09 stsp size_t mapoff;
703 d7464085 2018-07-09 stsp mapoff = (size_t)delta_offset + *len;
704 3976db15 2022-01-10 stsp if (mapoff + sizeof(offN) >= pack->filesize)
705 3976db15 2022-01-10 stsp return got_error(GOT_ERR_PACK_OFFSET);
706 d7464085 2018-07-09 stsp offN = *(pack->map + mapoff);
709 d7464085 2018-07-09 stsp n = read(pack->fd, &offN, sizeof(offN));
711 638f9024 2019-05-13 stsp return got_error_from_errno("read");
712 d7464085 2018-07-09 stsp if (n != sizeof(offN))
713 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
715 d7464085 2018-07-09 stsp *len += sizeof(offN);
717 b107e67f 2018-01-19 stsp if (i == 0)
718 b107e67f 2018-01-19 stsp o = (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
722 cecc778e 2018-01-23 stsp o += (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
725 b107e67f 2018-01-19 stsp } while (offN & GOT_PACK_OBJ_DELTA_OFF_MORE);
727 b107e67f 2018-01-19 stsp *offset = o;
728 6ccb713b 2018-01-19 stsp return NULL;
731 668a20f6 2020-03-18 stsp const struct got_error *
732 c0df5966 2021-12-31 stsp got_pack_parse_offset_delta(off_t *base_offset, size_t *len,
733 c0df5966 2021-12-31 stsp struct got_pack *pack, off_t offset, int tslen)
735 96f5e8b3 2018-01-23 stsp const struct got_error *err;
736 b107e67f 2018-01-19 stsp int64_t negoffset;
737 b107e67f 2018-01-19 stsp size_t negofflen;
741 d7464085 2018-07-09 stsp err = parse_negative_offset(&negoffset, &negofflen, pack,
742 d7464085 2018-07-09 stsp offset + tslen);
744 b107e67f 2018-01-19 stsp return err;
746 b107e67f 2018-01-19 stsp /* Compute the base object's offset (must be in the same pack file). */
747 96f5e8b3 2018-01-23 stsp *base_offset = (offset - negoffset);
748 96f5e8b3 2018-01-23 stsp if (*base_offset <= 0)
749 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_BAD_PACKFILE);
751 d7464085 2018-07-09 stsp *len = negofflen;
752 96f5e8b3 2018-01-23 stsp return NULL;
755 0e22967e 2018-02-11 stsp static const struct got_error *
756 42c69117 2019-11-10 stsp read_delta_data(uint8_t **delta_buf, size_t *delta_len,
757 42c69117 2019-11-10 stsp size_t delta_data_offset, struct got_pack *pack)
759 42c69117 2019-11-10 stsp const struct got_error *err = NULL;
761 42c69117 2019-11-10 stsp if (pack->map) {
762 42c69117 2019-11-10 stsp if (delta_data_offset >= pack->filesize)
763 42c69117 2019-11-10 stsp return got_error(GOT_ERR_PACK_OFFSET);
764 2e5a6fad 2020-03-18 stsp err = got_inflate_to_mem_mmap(delta_buf, delta_len,
765 2e5a6fad 2020-03-18 stsp NULL, NULL, pack->map, delta_data_offset,
766 2e5a6fad 2020-03-18 stsp pack->filesize - delta_data_offset);
768 42c69117 2019-11-10 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET) == -1)
769 42c69117 2019-11-10 stsp return got_error_from_errno("lseek");
770 3ab5e33c 2020-03-18 stsp err = got_inflate_to_mem_fd(delta_buf, delta_len, NULL,
771 55fdd257 2020-03-18 stsp NULL, 0, pack->fd);
773 42c69117 2019-11-10 stsp return err;
776 96f5e8b3 2018-01-23 stsp static const struct got_error *
777 c336f889 2018-07-23 stsp add_delta(struct got_delta_chain *deltas, off_t delta_offset, size_t tslen,
778 42c69117 2019-11-10 stsp int delta_type, size_t delta_size, size_t delta_data_offset)
780 bdd2fbb3 2018-02-11 stsp struct got_delta *delta;
782 c336f889 2018-07-23 stsp delta = got_delta_open(delta_offset, tslen, delta_type, delta_size,
783 42c69117 2019-11-10 stsp delta_data_offset);
784 bdd2fbb3 2018-02-11 stsp if (delta == NULL)
785 638f9024 2019-05-13 stsp return got_error_from_errno("got_delta_open");
786 bdd2fbb3 2018-02-11 stsp /* delta is freed in got_object_close() */
787 bdd2fbb3 2018-02-11 stsp deltas->nentries++;
788 dbdddfee 2021-06-23 naddy STAILQ_INSERT_HEAD(&deltas->entries, delta, entry);
789 bdd2fbb3 2018-02-11 stsp return NULL;
792 bdd2fbb3 2018-02-11 stsp static const struct got_error *
793 6b9c9673 2018-01-23 stsp resolve_offset_delta(struct got_delta_chain *deltas,
794 c8ecd499 2018-09-09 stsp struct got_packidx *packidx, struct got_pack *pack, off_t delta_offset,
795 c8ecd499 2018-09-09 stsp size_t tslen, int delta_type, size_t delta_size, unsigned int recursion)
798 a3500804 2018-01-23 stsp const struct got_error *err;
799 c3703302 2018-01-23 stsp off_t base_offset;
800 c3703302 2018-01-23 stsp uint8_t base_type;
801 c3703302 2018-01-23 stsp uint64_t base_size;
802 c3703302 2018-01-23 stsp size_t base_tslen;
803 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
804 42c69117 2019-11-10 stsp size_t consumed;
806 668a20f6 2020-03-18 stsp err = got_pack_parse_offset_delta(&base_offset, &consumed, pack,
807 d7464085 2018-07-09 stsp delta_offset, tslen);
809 a3500804 2018-01-23 stsp return err;
811 d7464085 2018-07-09 stsp delta_data_offset = delta_offset + tslen + consumed;
812 d7464085 2018-07-09 stsp if (delta_data_offset >= pack->filesize)
813 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
815 d7464085 2018-07-09 stsp if (pack->map == NULL) {
816 d7464085 2018-07-09 stsp delta_data_offset = lseek(pack->fd, 0, SEEK_CUR);
817 d7464085 2018-07-09 stsp if (delta_data_offset == -1)
818 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
821 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type, delta_size,
822 42c69117 2019-11-10 stsp delta_data_offset);
824 1a35c1bc 2019-05-22 stsp return err;
826 c3703302 2018-01-23 stsp /* An offset delta must be in the same packfile. */
827 1a35c1bc 2019-05-22 stsp if (base_offset >= pack->filesize)
828 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_PACK_OFFSET);
830 668a20f6 2020-03-18 stsp err = got_pack_parse_object_type_and_size(&base_type, &base_size,
831 668a20f6 2020-03-18 stsp &base_tslen, pack, base_offset);
833 1a35c1bc 2019-05-22 stsp return err;
835 668a20f6 2020-03-18 stsp return got_pack_resolve_delta_chain(deltas, packidx, pack, base_offset,
836 b0e2201a 2018-06-22 stsp base_tslen, base_type, base_size, recursion - 1);
839 c4330eff 2021-06-22 stsp const struct got_error *
840 c4330eff 2021-06-22 stsp got_pack_parse_ref_delta(struct got_object_id *id,
841 c4330eff 2021-06-22 stsp struct got_pack *pack, off_t delta_offset, int tslen)
843 c4330eff 2021-06-22 stsp if (pack->map) {
844 c4330eff 2021-06-22 stsp size_t mapoff = delta_offset + tslen;
845 3976db15 2022-01-10 stsp if (mapoff + sizeof(*id) >= pack->filesize)
846 3976db15 2022-01-10 stsp return got_error(GOT_ERR_PACK_OFFSET);
847 c4330eff 2021-06-22 stsp memcpy(id, pack->map + mapoff, sizeof(*id));
850 c4330eff 2021-06-22 stsp n = read(pack->fd, id, sizeof(*id));
852 c4330eff 2021-06-22 stsp return got_error_from_errno("read");
853 c4330eff 2021-06-22 stsp if (n != sizeof(*id))
854 c4330eff 2021-06-22 stsp return got_error(GOT_ERR_BAD_PACKFILE);
857 c4330eff 2021-06-22 stsp return NULL;
860 c3703302 2018-01-23 stsp static const struct got_error *
861 c8ecd499 2018-09-09 stsp resolve_ref_delta(struct got_delta_chain *deltas, struct got_packidx *packidx,
862 c8ecd499 2018-09-09 stsp struct got_pack *pack, off_t delta_offset, size_t tslen, int delta_type,
863 c8ecd499 2018-09-09 stsp size_t delta_size, unsigned int recursion)
865 6b9c9673 2018-01-23 stsp const struct got_error *err;
866 6b9c9673 2018-01-23 stsp struct got_object_id id;
868 6b9c9673 2018-01-23 stsp off_t base_offset;
869 6b9c9673 2018-01-23 stsp uint8_t base_type;
870 6b9c9673 2018-01-23 stsp uint64_t base_size;
871 6b9c9673 2018-01-23 stsp size_t base_tslen;
872 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
874 42c69117 2019-11-10 stsp if (delta_offset + tslen >= pack->filesize)
875 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
877 c4330eff 2021-06-22 stsp err = got_pack_parse_ref_delta(&id, pack, delta_offset, tslen);
879 c4330eff 2021-06-22 stsp return err;
880 d7464085 2018-07-09 stsp if (pack->map) {
881 c4330eff 2021-06-22 stsp delta_data_offset = delta_offset + tslen + sizeof(id);
883 e40b19ed 2020-01-06 stsp delta_data_offset = lseek(pack->fd, 0, SEEK_CUR);
884 e40b19ed 2020-01-06 stsp if (delta_data_offset == -1)
885 e40b19ed 2020-01-06 stsp return got_error_from_errno("lseek");
888 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type, delta_size,
889 42c69117 2019-11-10 stsp delta_data_offset);
891 1a35c1bc 2019-05-22 stsp return err;
893 652b2703 2018-06-22 stsp /* Delta base must be in the same pack file. */
894 1510f469 2018-09-09 stsp idx = got_packidx_get_object_idx(packidx, &id);
895 1a35c1bc 2019-05-22 stsp if (idx == -1)
896 668a20f6 2020-03-18 stsp return got_error(GOT_ERR_NO_OBJ);
898 02828bfd 2021-06-22 stsp base_offset = got_packidx_get_object_offset(packidx, idx);
899 1a35c1bc 2019-05-22 stsp if (base_offset == (uint64_t)-1)
900 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_BAD_PACKIDX);
902 1a35c1bc 2019-05-22 stsp if (base_offset >= pack->filesize)
903 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_PACK_OFFSET);
905 668a20f6 2020-03-18 stsp err = got_pack_parse_object_type_and_size(&base_type, &base_size,
906 668a20f6 2020-03-18 stsp &base_tslen, pack, base_offset);
908 1a35c1bc 2019-05-22 stsp return err;
910 668a20f6 2020-03-18 stsp return got_pack_resolve_delta_chain(deltas, packidx, pack, base_offset,
911 0c048b15 2018-04-27 stsp base_tslen, base_type, base_size, recursion - 1);
914 668a20f6 2020-03-18 stsp const struct got_error *
915 668a20f6 2020-03-18 stsp got_pack_resolve_delta_chain(struct got_delta_chain *deltas,
916 668a20f6 2020-03-18 stsp struct got_packidx *packidx, struct got_pack *pack, off_t delta_offset,
917 668a20f6 2020-03-18 stsp size_t tslen, int delta_type, size_t delta_size, unsigned int recursion)
919 c3703302 2018-01-23 stsp const struct got_error *err = NULL;
921 5b7e13a7 2018-04-02 stsp if (--recursion == 0)
922 5b7e13a7 2018-04-02 stsp return got_error(GOT_ERR_RECURSION);
924 c3703302 2018-01-23 stsp switch (delta_type) {
925 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_COMMIT:
926 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TREE:
927 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_BLOB:
928 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TAG:
929 c3703302 2018-01-23 stsp /* Plain types are the final delta base. Recursion ends. */
930 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type,
931 42c69117 2019-11-10 stsp delta_size, 0);
933 a3500804 2018-01-23 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
934 c8ecd499 2018-09-09 stsp err = resolve_offset_delta(deltas, packidx, pack,
935 b0e2201a 2018-06-22 stsp delta_offset, tslen, delta_type, delta_size, recursion - 1);
937 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_REF_DELTA:
938 c8ecd499 2018-09-09 stsp err = resolve_ref_delta(deltas, packidx, pack,
939 b0e2201a 2018-06-22 stsp delta_offset, tslen, delta_type, delta_size, recursion - 1);
942 4810de4a 2018-04-01 stsp return got_error(GOT_ERR_OBJ_TYPE);
945 96f5e8b3 2018-01-23 stsp return err;
948 96f5e8b3 2018-01-23 stsp static const struct got_error *
949 a98c62b1 2018-09-09 stsp open_delta_object(struct got_object **obj, struct got_packidx *packidx,
950 a98c62b1 2018-09-09 stsp struct got_pack *pack, struct got_object_id *id, off_t offset,
951 c59b3346 2018-09-11 stsp size_t tslen, int delta_type, size_t delta_size, int idx)
953 96f5e8b3 2018-01-23 stsp const struct got_error *err = NULL;
954 96f5e8b3 2018-01-23 stsp int resolved_type;
956 b107e67f 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
957 b107e67f 2018-01-19 stsp if (*obj == NULL)
958 638f9024 2019-05-13 stsp return got_error_from_errno("calloc");
960 96f5e8b3 2018-01-23 stsp (*obj)->flags = 0;
961 b107e67f 2018-01-19 stsp (*obj)->hdrlen = 0;
962 39e73dc9 2018-03-03 stsp (*obj)->size = 0; /* Not known because deltas aren't applied yet. */
963 106807b4 2018-09-15 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
964 cecc778e 2018-01-23 stsp (*obj)->pack_offset = offset + tslen;
966 dbdddfee 2021-06-23 naddy STAILQ_INIT(&(*obj)->deltas.entries);
967 1a35c1bc 2019-05-22 stsp (*obj)->flags |= GOT_OBJ_FLAG_DELTIFIED;
968 96f5e8b3 2018-01-23 stsp (*obj)->flags |= GOT_OBJ_FLAG_PACKED;
969 c59b3346 2018-09-11 stsp (*obj)->pack_idx = idx;
971 668a20f6 2020-03-18 stsp err = got_pack_resolve_delta_chain(&(*obj)->deltas, packidx, pack,
972 668a20f6 2020-03-18 stsp offset, tslen, delta_type, delta_size,
973 668a20f6 2020-03-18 stsp GOT_DELTA_CHAIN_RECURSION_MAX);
977 96f5e8b3 2018-01-23 stsp err = got_delta_chain_get_base_type(&resolved_type, &(*obj)->deltas);
980 96f5e8b3 2018-01-23 stsp (*obj)->type = resolved_type;
983 96f5e8b3 2018-01-23 stsp got_object_close(*obj);
984 96f5e8b3 2018-01-23 stsp *obj = NULL;
986 96f5e8b3 2018-01-23 stsp return err;
989 2090a03d 2018-09-09 stsp const struct got_error *
990 2090a03d 2018-09-09 stsp got_packfile_open_object(struct got_object **obj, struct got_pack *pack,
991 6fd11751 2018-06-04 stsp struct got_packidx *packidx, int idx, struct got_object_id *id)
993 a1fd68d8 2018-01-12 stsp const struct got_error *err = NULL;
994 a1fd68d8 2018-01-12 stsp off_t offset;
995 6c00b545 2018-01-17 stsp uint8_t type;
996 6c00b545 2018-01-17 stsp uint64_t size;
997 3ee5fc21 2018-01-17 stsp size_t tslen;
999 6c00b545 2018-01-17 stsp *obj = NULL;
1001 02828bfd 2021-06-22 stsp offset = got_packidx_get_object_offset(packidx, idx);
1002 a1fd68d8 2018-01-12 stsp if (offset == (uint64_t)-1)
1003 a1fd68d8 2018-01-12 stsp return got_error(GOT_ERR_BAD_PACKIDX);
1005 668a20f6 2020-03-18 stsp err = got_pack_parse_object_type_and_size(&type, &size, &tslen,
1006 668a20f6 2020-03-18 stsp pack, offset);
1008 35c73765 2018-09-09 stsp return err;
1010 6c00b545 2018-01-17 stsp switch (type) {
1011 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_COMMIT:
1012 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_TREE:
1013 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_BLOB:
1014 d33fc9ef 2018-01-23 stsp case GOT_OBJ_TYPE_TAG:
1015 5f25cc85 2019-11-26 stsp err = open_plain_object(obj, id, type, offset + tslen,
1016 5f25cc85 2019-11-26 stsp size, idx);
1018 b107e67f 2018-01-19 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
1019 a48db7e5 2018-01-23 stsp case GOT_OBJ_TYPE_REF_DELTA:
1020 a98c62b1 2018-09-09 stsp err = open_delta_object(obj, packidx, pack, id, offset,
1021 c59b3346 2018-09-11 stsp tslen, type, size, idx);
1024 4810de4a 2018-04-01 stsp err = got_error(GOT_ERR_OBJ_TYPE);
1028 3ee5fc21 2018-01-17 stsp return err;
1031 d582f26c 2020-03-18 stsp const struct got_error *
1032 c0df5966 2021-12-31 stsp got_pack_get_delta_chain_max_size(uint64_t *max_size,
1033 c0df5966 2021-12-31 stsp struct got_delta_chain *deltas, struct got_pack *pack)
1035 22484865 2018-03-13 stsp struct got_delta *delta;
1036 22484865 2018-03-13 stsp uint64_t base_size = 0, result_size = 0;
1038 22484865 2018-03-13 stsp *max_size = 0;
1039 dbdddfee 2021-06-23 naddy STAILQ_FOREACH(delta, &deltas->entries, entry) {
1040 22484865 2018-03-13 stsp /* Plain object types are the delta base. */
1041 22484865 2018-03-13 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1042 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1043 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1044 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1045 22484865 2018-03-13 stsp const struct got_error *err;
1046 42c69117 2019-11-10 stsp uint8_t *delta_buf;
1047 42c69117 2019-11-10 stsp size_t delta_len;
1048 ab2f42e7 2019-11-10 stsp int cached = 1;
1050 ab2f42e7 2019-11-10 stsp got_delta_cache_get(&delta_buf, &delta_len,
1051 ab2f42e7 2019-11-10 stsp pack->delta_cache, delta->data_offset);
1052 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1053 ab2f42e7 2019-11-10 stsp cached = 0;
1054 ab2f42e7 2019-11-10 stsp err = read_delta_data(&delta_buf, &delta_len,
1055 ab2f42e7 2019-11-10 stsp delta->data_offset, pack);
1057 ab2f42e7 2019-11-10 stsp return err;
1058 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1059 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1060 ab2f42e7 2019-11-10 stsp if (err == NULL)
1061 ab2f42e7 2019-11-10 stsp cached = 1;
1062 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1063 ab2f42e7 2019-11-10 stsp free(delta_buf);
1064 ab2f42e7 2019-11-10 stsp return err;
1067 a53d2f13 2018-03-17 stsp err = got_delta_get_sizes(&base_size, &result_size,
1068 42c69117 2019-11-10 stsp delta_buf, delta_len);
1069 ab2f42e7 2019-11-10 stsp if (!cached)
1070 ab2f42e7 2019-11-10 stsp free(delta_buf);
1072 22484865 2018-03-13 stsp return err;
1074 22484865 2018-03-13 stsp base_size = delta->size;
1075 22484865 2018-03-13 stsp if (base_size > *max_size)
1076 22484865 2018-03-13 stsp *max_size = base_size;
1077 22484865 2018-03-13 stsp if (result_size > *max_size)
1078 22484865 2018-03-13 stsp *max_size = result_size;
1081 9feb4ff2 2018-03-14 stsp return NULL;
1084 ac544f8c 2019-01-13 stsp const struct got_error *
1085 42c69117 2019-11-10 stsp got_pack_get_max_delta_object_size(uint64_t *size, struct got_object *obj,
1086 42c69117 2019-11-10 stsp struct got_pack *pack)
1088 85a703fa 2019-01-13 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0)
1089 85a703fa 2019-01-13 stsp return got_error(GOT_ERR_OBJ_TYPE);
1091 d582f26c 2020-03-18 stsp return got_pack_get_delta_chain_max_size(size, &obj->deltas, pack);
1094 668a20f6 2020-03-18 stsp const struct got_error *
1095 4788f1ce 2020-03-18 stsp got_pack_dump_delta_chain_to_file(size_t *result_size,
1096 4788f1ce 2020-03-18 stsp struct got_delta_chain *deltas, struct got_pack *pack, FILE *outfile,
1097 4788f1ce 2020-03-18 stsp FILE *base_file, FILE *accum_file)
1099 efd2a263 2018-01-19 stsp const struct got_error *err = NULL;
1100 6691714a 2018-01-23 stsp struct got_delta *delta;
1101 42c69117 2019-11-10 stsp uint8_t *base_buf = NULL, *accum_buf = NULL, *delta_buf;
1102 42c69117 2019-11-10 stsp size_t base_bufsz = 0, accum_size = 0, delta_len;
1103 22484865 2018-03-13 stsp uint64_t max_size;
1104 6691714a 2018-01-23 stsp int n = 0;
1106 b29656e2 2018-03-16 stsp *result_size = 0;
1108 dbdddfee 2021-06-23 naddy if (STAILQ_EMPTY(&deltas->entries))
1109 6691714a 2018-01-23 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
1111 8628c62d 2018-03-15 stsp /* We process small enough files entirely in memory for speed. */
1112 d582f26c 2020-03-18 stsp err = got_pack_get_delta_chain_max_size(&max_size, deltas, pack);
1114 22484865 2018-03-13 stsp return err;
1115 8628c62d 2018-03-15 stsp if (max_size < GOT_DELTA_RESULT_SIZE_CACHED_MAX) {
1116 8628c62d 2018-03-15 stsp accum_buf = malloc(max_size);
1117 8628c62d 2018-03-15 stsp if (accum_buf == NULL)
1118 638f9024 2019-05-13 stsp return got_error_from_errno("malloc");
1119 3840f4c9 2018-09-12 stsp base_file = NULL;
1120 3840f4c9 2018-09-12 stsp accum_file = NULL;
1122 3bfc2334 2022-01-11 stsp if (fseeko(base_file, 0L, SEEK_SET) == -1)
1123 3bfc2334 2022-01-11 stsp return got_error_from_errno("fseeko");
1124 3bfc2334 2022-01-11 stsp if (fseeko(accum_file, 0L, SEEK_SET) == -1)
1125 3bfc2334 2022-01-11 stsp return got_error_from_errno("fseeko");
1128 6691714a 2018-01-23 stsp /* Deltas are ordered in ascending order. */
1129 dbdddfee 2021-06-23 naddy STAILQ_FOREACH(delta, &deltas->entries, entry) {
1130 ab2f42e7 2019-11-10 stsp int cached = 1;
1131 a6b158cc 2018-02-11 stsp if (n == 0) {
1132 34fca9c3 2018-11-11 stsp size_t mapoff;
1133 0c048b15 2018-04-27 stsp off_t delta_data_offset;
1135 a6b158cc 2018-02-11 stsp /* Plain object types are the delta base. */
1136 a6b158cc 2018-02-11 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1137 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1138 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1139 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1140 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1141 72eb3431 2018-04-01 stsp goto done;
1144 0c048b15 2018-04-27 stsp delta_data_offset = delta->offset + delta->tslen;
1145 0c048b15 2018-04-27 stsp if (delta_data_offset >= pack->filesize) {
1146 0c048b15 2018-04-27 stsp err = got_error(GOT_ERR_PACK_OFFSET);
1147 0c048b15 2018-04-27 stsp goto done;
1149 d7464085 2018-07-09 stsp if (pack->map == NULL) {
1150 d7464085 2018-07-09 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET)
1152 638f9024 2019-05-13 stsp err = got_error_from_errno("lseek");
1153 d7464085 2018-07-09 stsp goto done;
1156 d7464085 2018-07-09 stsp if (base_file) {
1157 d7464085 2018-07-09 stsp if (pack->map) {
1158 d7464085 2018-07-09 stsp mapoff = (size_t)delta_data_offset;
1159 d7464085 2018-07-09 stsp err = got_inflate_to_file_mmap(
1160 4788f1ce 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->map,
1161 4788f1ce 2020-03-18 stsp mapoff, pack->filesize - mapoff,
1162 4788f1ce 2020-03-18 stsp base_file);
1164 34fca9c3 2018-11-11 stsp err = got_inflate_to_file_fd(
1165 4788f1ce 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->fd,
1166 4788f1ce 2020-03-18 stsp base_file);
1168 d7464085 2018-07-09 stsp if (pack->map) {
1169 d7464085 2018-07-09 stsp mapoff = (size_t)delta_data_offset;
1170 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&base_buf,
1171 2e5a6fad 2020-03-18 stsp &base_bufsz, NULL, NULL,
1172 2e5a6fad 2020-03-18 stsp pack->map, mapoff,
1173 d7464085 2018-07-09 stsp pack->filesize - mapoff);
1175 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&base_buf,
1176 55fdd257 2020-03-18 stsp &base_bufsz, NULL, NULL, max_size,
1177 55fdd257 2020-03-18 stsp pack->fd);
1180 a6b158cc 2018-02-11 stsp goto done;
1182 8628c62d 2018-03-15 stsp if (base_file)
1183 8628c62d 2018-03-15 stsp rewind(base_file);
1187 ab2f42e7 2019-11-10 stsp got_delta_cache_get(&delta_buf, &delta_len,
1188 ab2f42e7 2019-11-10 stsp pack->delta_cache, delta->data_offset);
1189 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1190 ab2f42e7 2019-11-10 stsp cached = 0;
1191 ab2f42e7 2019-11-10 stsp err = read_delta_data(&delta_buf, &delta_len,
1192 ab2f42e7 2019-11-10 stsp delta->data_offset, pack);
1194 ab2f42e7 2019-11-10 stsp goto done;
1195 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1196 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1197 ab2f42e7 2019-11-10 stsp if (err == NULL)
1198 ab2f42e7 2019-11-10 stsp cached = 1;
1199 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1200 ab2f42e7 2019-11-10 stsp free(delta_buf);
1201 ab2f42e7 2019-11-10 stsp goto done;
1204 8628c62d 2018-03-15 stsp if (base_buf) {
1205 34fca9c3 2018-11-11 stsp err = got_delta_apply_in_mem(base_buf, base_bufsz,
1206 42c69117 2019-11-10 stsp delta_buf, delta_len, accum_buf,
1207 34fca9c3 2018-11-11 stsp &accum_size, max_size);
1210 42c69117 2019-11-10 stsp err = got_delta_apply(base_file, delta_buf,
1211 42c69117 2019-11-10 stsp delta_len,
1212 8628c62d 2018-03-15 stsp /* Final delta application writes to output file. */
1213 b29656e2 2018-03-16 stsp ++n < deltas->nentries ? accum_file : outfile,
1214 b29656e2 2018-03-16 stsp &accum_size);
1216 ab2f42e7 2019-11-10 stsp if (!cached)
1217 ab2f42e7 2019-11-10 stsp free(delta_buf);
1219 6691714a 2018-01-23 stsp goto done;
1221 710bb5ca 2018-01-23 stsp if (n < deltas->nentries) {
1222 6691714a 2018-01-23 stsp /* Accumulated delta becomes the new base. */
1223 8628c62d 2018-03-15 stsp if (base_buf) {
1224 8628c62d 2018-03-15 stsp uint8_t *tmp = accum_buf;
1226 34fca9c3 2018-11-11 stsp * Base buffer switches roles with accumulation
1227 34fca9c3 2018-11-11 stsp * buffer. Ensure it can hold the largest
1228 34fca9c3 2018-11-11 stsp * result in the delta chain. The initial
1229 34fca9c3 2018-11-11 stsp * allocation might have been smaller.
1231 34fca9c3 2018-11-11 stsp if (base_bufsz < max_size) {
1232 34fca9c3 2018-11-11 stsp uint8_t *p;
1233 34fca9c3 2018-11-11 stsp p = reallocarray(base_buf, 1, max_size);
1234 34fca9c3 2018-11-11 stsp if (p == NULL) {
1235 638f9024 2019-05-13 stsp err = got_error_from_errno(
1236 230a42bd 2019-05-11 jcs "reallocarray");
1237 34fca9c3 2018-11-11 stsp goto done;
1239 34fca9c3 2018-11-11 stsp base_buf = p;
1240 34fca9c3 2018-11-11 stsp base_bufsz = max_size;
1242 8628c62d 2018-03-15 stsp accum_buf = base_buf;
1243 8628c62d 2018-03-15 stsp base_buf = tmp;
1245 8628c62d 2018-03-15 stsp FILE *tmp = accum_file;
1246 8628c62d 2018-03-15 stsp accum_file = base_file;
1247 8628c62d 2018-03-15 stsp base_file = tmp;
1248 8628c62d 2018-03-15 stsp rewind(base_file);
1249 8628c62d 2018-03-15 stsp rewind(accum_file);
1255 8628c62d 2018-03-15 stsp free(base_buf);
1256 8628c62d 2018-03-15 stsp if (accum_buf) {
1257 8628c62d 2018-03-15 stsp size_t len = fwrite(accum_buf, 1, accum_size, outfile);
1258 8628c62d 2018-03-15 stsp free(accum_buf);
1259 8628c62d 2018-03-15 stsp if (len != accum_size)
1260 673702af 2018-07-23 stsp err = got_ferror(outfile, GOT_ERR_IO);
1262 6691714a 2018-01-23 stsp rewind(outfile);
1263 b29656e2 2018-03-16 stsp if (err == NULL)
1264 b29656e2 2018-03-16 stsp *result_size = accum_size;
1265 e0ab43e7 2018-03-16 stsp return err;
1268 668a20f6 2020-03-18 stsp const struct got_error *
1269 668a20f6 2020-03-18 stsp got_pack_dump_delta_chain_to_mem(uint8_t **outbuf, size_t *outlen,
1270 48095039 2018-09-09 stsp struct got_delta_chain *deltas, struct got_pack *pack)
1272 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1273 e0ab43e7 2018-03-16 stsp struct got_delta *delta;
1274 42c69117 2019-11-10 stsp uint8_t *base_buf = NULL, *accum_buf = NULL, *delta_buf;
1275 42c69117 2019-11-10 stsp size_t base_bufsz = 0, accum_size = 0, delta_len;
1276 e0ab43e7 2018-03-16 stsp uint64_t max_size;
1277 e0ab43e7 2018-03-16 stsp int n = 0;
1279 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1280 e0ab43e7 2018-03-16 stsp *outlen = 0;
1282 dbdddfee 2021-06-23 naddy if (STAILQ_EMPTY(&deltas->entries))
1283 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
1285 d582f26c 2020-03-18 stsp err = got_pack_get_delta_chain_max_size(&max_size, deltas, pack);
1287 e0ab43e7 2018-03-16 stsp return err;
1288 e0ab43e7 2018-03-16 stsp accum_buf = malloc(max_size);
1289 e0ab43e7 2018-03-16 stsp if (accum_buf == NULL)
1290 638f9024 2019-05-13 stsp return got_error_from_errno("malloc");
1292 e0ab43e7 2018-03-16 stsp /* Deltas are ordered in ascending order. */
1293 dbdddfee 2021-06-23 naddy STAILQ_FOREACH(delta, &deltas->entries, entry) {
1294 ab2f42e7 2019-11-10 stsp int cached = 1;
1295 e0ab43e7 2018-03-16 stsp if (n == 0) {
1296 0c048b15 2018-04-27 stsp size_t delta_data_offset;
1298 e0ab43e7 2018-03-16 stsp /* Plain object types are the delta base. */
1299 e0ab43e7 2018-03-16 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1300 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1301 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1302 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1303 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1304 72eb3431 2018-04-01 stsp goto done;
1307 0c048b15 2018-04-27 stsp delta_data_offset = delta->offset + delta->tslen;
1308 0c048b15 2018-04-27 stsp if (delta_data_offset >= pack->filesize) {
1309 0c048b15 2018-04-27 stsp err = got_error(GOT_ERR_PACK_OFFSET);
1310 0c048b15 2018-04-27 stsp goto done;
1312 d7464085 2018-07-09 stsp if (pack->map) {
1313 d7464085 2018-07-09 stsp size_t mapoff = (size_t)delta_data_offset;
1314 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&base_buf,
1315 2e5a6fad 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->map,
1316 2e5a6fad 2020-03-18 stsp mapoff, pack->filesize - mapoff);
1318 d7464085 2018-07-09 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET)
1320 638f9024 2019-05-13 stsp err = got_error_from_errno("lseek");
1321 d7464085 2018-07-09 stsp goto done;
1323 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&base_buf,
1324 55fdd257 2020-03-18 stsp &base_bufsz, NULL, NULL, max_size,
1325 55fdd257 2020-03-18 stsp pack->fd);
1328 d7464085 2018-07-09 stsp goto done;
1333 ab2f42e7 2019-11-10 stsp got_delta_cache_get(&delta_buf, &delta_len,
1334 ab2f42e7 2019-11-10 stsp pack->delta_cache, delta->data_offset);
1335 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1336 ab2f42e7 2019-11-10 stsp cached = 0;
1337 ab2f42e7 2019-11-10 stsp err = read_delta_data(&delta_buf, &delta_len,
1338 ab2f42e7 2019-11-10 stsp delta->data_offset, pack);
1340 ab2f42e7 2019-11-10 stsp goto done;
1341 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1342 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1343 ab2f42e7 2019-11-10 stsp if (err == NULL)
1344 ab2f42e7 2019-11-10 stsp cached = 1;
1345 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1346 ab2f42e7 2019-11-10 stsp free(delta_buf);
1347 ab2f42e7 2019-11-10 stsp goto done;
1350 34fca9c3 2018-11-11 stsp err = got_delta_apply_in_mem(base_buf, base_bufsz,
1351 42c69117 2019-11-10 stsp delta_buf, delta_len, accum_buf,
1352 34fca9c3 2018-11-11 stsp &accum_size, max_size);
1353 ab2f42e7 2019-11-10 stsp if (!cached)
1354 ab2f42e7 2019-11-10 stsp free(delta_buf);
1357 e0ab43e7 2018-03-16 stsp goto done;
1359 e0ab43e7 2018-03-16 stsp if (n < deltas->nentries) {
1360 e0ab43e7 2018-03-16 stsp /* Accumulated delta becomes the new base. */
1361 e0ab43e7 2018-03-16 stsp uint8_t *tmp = accum_buf;
1363 34fca9c3 2018-11-11 stsp * Base buffer switches roles with accumulation buffer.
1364 34fca9c3 2018-11-11 stsp * Ensure it can hold the largest result in the delta
1365 34fca9c3 2018-11-11 stsp * chain. Initial allocation might have been smaller.
1367 34fca9c3 2018-11-11 stsp if (base_bufsz < max_size) {
1368 34fca9c3 2018-11-11 stsp uint8_t *p;
1369 34fca9c3 2018-11-11 stsp p = reallocarray(base_buf, 1, max_size);
1370 34fca9c3 2018-11-11 stsp if (p == NULL) {
1371 638f9024 2019-05-13 stsp err = got_error_from_errno(
1372 230a42bd 2019-05-11 jcs "reallocarray");
1373 34fca9c3 2018-11-11 stsp goto done;
1375 34fca9c3 2018-11-11 stsp base_buf = p;
1376 34fca9c3 2018-11-11 stsp base_bufsz = max_size;
1378 e0ab43e7 2018-03-16 stsp accum_buf = base_buf;
1379 e0ab43e7 2018-03-16 stsp base_buf = tmp;
1384 e0ab43e7 2018-03-16 stsp free(base_buf);
1385 e0ab43e7 2018-03-16 stsp if (err) {
1386 e0ab43e7 2018-03-16 stsp free(accum_buf);
1387 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1388 e0ab43e7 2018-03-16 stsp *outlen = 0;
1390 e0ab43e7 2018-03-16 stsp *outbuf = accum_buf;
1391 e0ab43e7 2018-03-16 stsp *outlen = accum_size;
1393 efd2a263 2018-01-19 stsp return err;
1396 3ee5fc21 2018-01-17 stsp const struct got_error *
1397 24140570 2018-09-09 stsp got_packfile_extract_object(struct got_pack *pack, struct got_object *obj,
1398 3840f4c9 2018-09-12 stsp FILE *outfile, FILE *base_file, FILE *accum_file)
1400 3ee5fc21 2018-01-17 stsp const struct got_error *err = NULL;
1402 3ee5fc21 2018-01-17 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1403 3ee5fc21 2018-01-17 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1405 ef2bccd9 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1406 24140570 2018-09-09 stsp if (obj->pack_offset >= pack->filesize)
1407 24140570 2018-09-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1409 d7464085 2018-07-09 stsp if (pack->map) {
1410 d7464085 2018-07-09 stsp size_t mapoff = (size_t)obj->pack_offset;
1411 4788f1ce 2020-03-18 stsp err = got_inflate_to_file_mmap(&obj->size, NULL, NULL,
1412 4788f1ce 2020-03-18 stsp pack->map, mapoff, pack->filesize - mapoff,
1415 24140570 2018-09-09 stsp if (lseek(pack->fd, obj->pack_offset, SEEK_SET) == -1)
1416 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
1417 4788f1ce 2020-03-18 stsp err = got_inflate_to_file_fd(&obj->size, NULL, NULL,
1418 4788f1ce 2020-03-18 stsp pack->fd, outfile);
1421 4788f1ce 2020-03-18 stsp err = got_pack_dump_delta_chain_to_file(&obj->size,
1422 4788f1ce 2020-03-18 stsp &obj->deltas, pack, outfile, base_file, accum_file);
1424 a1fd68d8 2018-01-12 stsp return err;
1427 e0ab43e7 2018-03-16 stsp const struct got_error *
1428 e0ab43e7 2018-03-16 stsp got_packfile_extract_object_to_mem(uint8_t **buf, size_t *len,
1429 7e212e3d 2018-09-09 stsp struct got_object *obj, struct got_pack *pack)
1431 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1433 e0ab43e7 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1434 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1436 48095039 2018-09-09 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1437 7e212e3d 2018-09-09 stsp if (obj->pack_offset >= pack->filesize)
1438 7e212e3d 2018-09-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1439 d7464085 2018-07-09 stsp if (pack->map) {
1440 d7464085 2018-07-09 stsp size_t mapoff = (size_t)obj->pack_offset;
1441 2e5a6fad 2020-03-18 stsp err = got_inflate_to_mem_mmap(buf, len, NULL, NULL,
1442 2e5a6fad 2020-03-18 stsp pack->map, mapoff, pack->filesize - mapoff);
1444 7e212e3d 2018-09-09 stsp if (lseek(pack->fd, obj->pack_offset, SEEK_SET) == -1)
1445 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
1446 1e87a3c3 2020-03-18 stsp err = got_inflate_to_mem_fd(buf, len, NULL, NULL,
1447 55fdd257 2020-03-18 stsp obj->size, pack->fd);
1450 668a20f6 2020-03-18 stsp err = got_pack_dump_delta_chain_to_mem(buf, len, &obj->deltas,
1453 e0ab43e7 2018-03-16 stsp return err;