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 511a516b 2018-05-19 stsp #include "got_opentemp.h"
35 324d37e7 2019-05-11 stsp #include "got_path.h"
37 718b3ab0 2018-03-17 stsp #include "got_lib_sha1.h"
38 718b3ab0 2018-03-17 stsp #include "got_lib_delta.h"
39 ab2f42e7 2019-11-10 stsp #include "got_lib_delta_cache.h"
40 63581804 2018-07-09 stsp #include "got_lib_inflate.h"
41 718b3ab0 2018-03-17 stsp #include "got_lib_object.h"
42 dd88155e 2019-06-29 stsp #include "got_lib_object_parse.h"
43 876c234b 2018-09-10 stsp #include "got_lib_privsep.h"
44 15a94983 2018-12-23 stsp #include "got_lib_pack.h"
46 79b11c62 2018-03-09 stsp #ifndef nitems
47 79b11c62 2018-03-09 stsp #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
51 a1fd68d8 2018-01-12 stsp #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
54 0a0a3048 2018-01-10 stsp static const struct got_error *
55 0a0a3048 2018-01-10 stsp verify_fanout_table(uint32_t *fanout_table)
59 0a0a3048 2018-01-10 stsp for (i = 0; i < 0xff - 1; i++) {
60 a1fd68d8 2018-01-12 stsp if (be32toh(fanout_table[i]) > be32toh(fanout_table[i + 1]))
61 0a0a3048 2018-01-10 stsp return got_error(GOT_ERR_BAD_PACKIDX);
64 0a0a3048 2018-01-10 stsp return NULL;
67 1510f469 2018-09-09 stsp const struct got_error *
68 c3564dfa 2021-07-15 stsp got_packidx_init_hdr(struct got_packidx *p, int verify, off_t packfile_size)
70 0a0a3048 2018-01-10 stsp const struct got_error *err = NULL;
71 817c5a18 2018-09-09 stsp struct got_packidx_v2_hdr *h;
72 0ebaf008 2018-01-10 stsp SHA1_CTX ctx;
73 0ebaf008 2018-01-10 stsp uint8_t sha1[SHA1_DIGEST_LENGTH];
74 817c5a18 2018-09-09 stsp size_t nobj, len_fanout, len_ids, offset, remain;
78 0ebaf008 2018-01-10 stsp SHA1Init(&ctx);
80 57b35b75 2018-06-22 stsp h = &p->hdr;
82 57b35b75 2018-06-22 stsp remain = p->len;
84 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->magic)) {
85 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
89 fc79a48d 2018-07-09 stsp h->magic = (uint32_t *)(p->map + offset);
91 fc79a48d 2018-07-09 stsp h->magic = malloc(sizeof(*h->magic));
92 fc79a48d 2018-07-09 stsp if (h->magic == NULL) {
93 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
96 fc79a48d 2018-07-09 stsp n = read(p->fd, h->magic, sizeof(*h->magic));
97 b1317e77 2019-09-22 stsp if (n < 0) {
98 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
100 b1317e77 2019-09-22 stsp } else if (n != sizeof(*h->magic)) {
101 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
105 ac62b712 2021-03-30 stsp if (*h->magic != htobe32(GOT_PACKIDX_V2_MAGIC)) {
106 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
109 57b35b75 2018-06-22 stsp offset += sizeof(*h->magic);
110 57b35b75 2018-06-22 stsp remain -= sizeof(*h->magic);
112 0cb74cf4 2018-07-08 stsp if (verify)
113 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->magic, sizeof(*h->magic));
115 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->version)) {
116 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
119 fc79a48d 2018-07-09 stsp if (p->map)
120 fc79a48d 2018-07-09 stsp h->version = (uint32_t *)(p->map + offset);
122 fc79a48d 2018-07-09 stsp h->version = malloc(sizeof(*h->version));
123 fc79a48d 2018-07-09 stsp if (h->version == NULL) {
124 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
127 fc79a48d 2018-07-09 stsp n = read(p->fd, h->version, sizeof(*h->version));
128 c6368c2e 2019-10-11 stsp if (n < 0) {
129 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
131 c6368c2e 2019-10-11 stsp } else if (n != sizeof(*h->version)) {
132 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
136 ac62b712 2021-03-30 stsp if (*h->version != htobe32(GOT_PACKIDX_VERSION)) {
137 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
140 57b35b75 2018-06-22 stsp offset += sizeof(*h->version);
141 57b35b75 2018-06-22 stsp remain -= sizeof(*h->version);
143 0cb74cf4 2018-07-08 stsp if (verify)
144 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->version, sizeof(*h->version));
146 57b35b75 2018-06-22 stsp len_fanout =
147 57b35b75 2018-06-22 stsp sizeof(*h->fanout_table) * GOT_PACKIDX_V2_FANOUT_TABLE_ITEMS;
148 57b35b75 2018-06-22 stsp if (remain < len_fanout) {
149 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
152 fc79a48d 2018-07-09 stsp if (p->map)
153 fc79a48d 2018-07-09 stsp h->fanout_table = (uint32_t *)(p->map + offset);
155 fc79a48d 2018-07-09 stsp h->fanout_table = malloc(len_fanout);
156 fc79a48d 2018-07-09 stsp if (h->fanout_table == NULL) {
157 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
160 fc79a48d 2018-07-09 stsp n = read(p->fd, h->fanout_table, len_fanout);
161 c6368c2e 2019-10-11 stsp if (n < 0) {
162 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
164 c6368c2e 2019-10-11 stsp } else if (n != len_fanout) {
165 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
169 c8262310 2018-06-04 stsp err = verify_fanout_table(h->fanout_table);
172 0cb74cf4 2018-07-08 stsp if (verify)
173 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->fanout_table, len_fanout);
174 57b35b75 2018-06-22 stsp offset += len_fanout;
175 57b35b75 2018-06-22 stsp remain -= len_fanout;
177 78fb0967 2020-09-09 naddy nobj = be32toh(h->fanout_table[0xff]);
178 57b35b75 2018-06-22 stsp len_ids = nobj * sizeof(*h->sorted_ids);
179 57b35b75 2018-06-22 stsp if (len_ids <= nobj || len_ids > remain) {
180 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
183 fc79a48d 2018-07-09 stsp if (p->map)
184 fc79a48d 2018-07-09 stsp h->sorted_ids =
185 fc79a48d 2018-07-09 stsp (struct got_packidx_object_id *)((uint8_t*)(p->map + offset));
187 fc79a48d 2018-07-09 stsp h->sorted_ids = malloc(len_ids);
188 fc79a48d 2018-07-09 stsp if (h->sorted_ids == NULL) {
189 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
192 fc79a48d 2018-07-09 stsp n = read(p->fd, h->sorted_ids, len_ids);
194 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
195 faaa1c0f 2018-09-15 stsp else if (n != len_ids) {
196 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
200 0cb74cf4 2018-07-08 stsp if (verify)
201 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->sorted_ids, len_ids);
202 57b35b75 2018-06-22 stsp offset += len_ids;
203 57b35b75 2018-06-22 stsp remain -= len_ids;
205 57b35b75 2018-06-22 stsp if (remain < nobj * sizeof(*h->crc32)) {
206 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
209 fc79a48d 2018-07-09 stsp if (p->map)
210 fc79a48d 2018-07-09 stsp h->crc32 = (uint32_t *)((uint8_t*)(p->map + offset));
212 fc79a48d 2018-07-09 stsp h->crc32 = malloc(nobj * sizeof(*h->crc32));
213 fc79a48d 2018-07-09 stsp if (h->crc32 == NULL) {
214 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
217 fc79a48d 2018-07-09 stsp n = read(p->fd, h->crc32, nobj * sizeof(*h->crc32));
219 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
220 faaa1c0f 2018-09-15 stsp else if (n != nobj * sizeof(*h->crc32)) {
221 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
225 0cb74cf4 2018-07-08 stsp if (verify)
226 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->crc32, nobj * sizeof(*h->crc32));
227 57b35b75 2018-06-22 stsp remain -= nobj * sizeof(*h->crc32);
228 57b35b75 2018-06-22 stsp offset += nobj * sizeof(*h->crc32);
230 57b35b75 2018-06-22 stsp if (remain < nobj * sizeof(*h->offsets)) {
231 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
234 fc79a48d 2018-07-09 stsp if (p->map)
235 fc79a48d 2018-07-09 stsp h->offsets = (uint32_t *)((uint8_t*)(p->map + offset));
237 fc79a48d 2018-07-09 stsp h->offsets = malloc(nobj * sizeof(*h->offsets));
238 fc79a48d 2018-07-09 stsp if (h->offsets == NULL) {
239 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
242 fc79a48d 2018-07-09 stsp n = read(p->fd, h->offsets, nobj * sizeof(*h->offsets));
244 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
245 faaa1c0f 2018-09-15 stsp else if (n != nobj * sizeof(*h->offsets)) {
246 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
250 0cb74cf4 2018-07-08 stsp if (verify)
251 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->offsets,
252 0cb74cf4 2018-07-08 stsp nobj * sizeof(*h->offsets));
253 57b35b75 2018-06-22 stsp remain -= nobj * sizeof(*h->offsets);
254 57b35b75 2018-06-22 stsp offset += nobj * sizeof(*h->offsets);
256 0a0a3048 2018-01-10 stsp /* Large file offsets are contained only in files > 2GB. */
257 c3564dfa 2021-07-15 stsp if (verify || packfile_size > 0x7fffffff) {
258 c3564dfa 2021-07-15 stsp for (i = 0; i < nobj; i++) {
259 c3564dfa 2021-07-15 stsp uint32_t o = h->offsets[i];
260 c3564dfa 2021-07-15 stsp if (o & htobe32(GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX))
261 c3564dfa 2021-07-15 stsp p->nlargeobj++;
264 5e6be232 2019-11-08 stsp if (p->nlargeobj == 0)
265 0a0a3048 2018-01-10 stsp goto checksum;
266 c3564dfa 2021-07-15 stsp else if (packfile_size <= 0x7fffffff) {
267 c3564dfa 2021-07-15 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
271 5e6be232 2019-11-08 stsp if (remain < p->nlargeobj * sizeof(*h->large_offsets)) {
272 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
275 fc79a48d 2018-07-09 stsp if (p->map)
276 fc79a48d 2018-07-09 stsp h->large_offsets = (uint64_t *)((uint8_t*)(p->map + offset));
278 5e6be232 2019-11-08 stsp h->large_offsets = malloc(p->nlargeobj *
279 5e6be232 2019-11-08 stsp sizeof(*h->large_offsets));
280 de30857e 2019-08-23 stsp if (h->large_offsets == NULL) {
281 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
284 fc79a48d 2018-07-09 stsp n = read(p->fd, h->large_offsets,
285 5e6be232 2019-11-08 stsp p->nlargeobj * sizeof(*h->large_offsets));
287 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
288 5e6be232 2019-11-08 stsp else if (n != p->nlargeobj * sizeof(*h->large_offsets)) {
289 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
293 0cb74cf4 2018-07-08 stsp if (verify)
294 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t*)h->large_offsets,
295 5e6be232 2019-11-08 stsp p->nlargeobj * sizeof(*h->large_offsets));
296 5e6be232 2019-11-08 stsp remain -= p->nlargeobj * sizeof(*h->large_offsets);
297 5e6be232 2019-11-08 stsp offset += p->nlargeobj * sizeof(*h->large_offsets);
300 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->trailer)) {
301 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
304 fc79a48d 2018-07-09 stsp if (p->map)
305 fc79a48d 2018-07-09 stsp h->trailer =
306 fc79a48d 2018-07-09 stsp (struct got_packidx_trailer *)((uint8_t*)(p->map + offset));
308 fc79a48d 2018-07-09 stsp h->trailer = malloc(sizeof(*h->trailer));
309 fc79a48d 2018-07-09 stsp if (h->trailer == NULL) {
310 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
313 fc79a48d 2018-07-09 stsp n = read(p->fd, h->trailer, sizeof(*h->trailer));
315 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
316 faaa1c0f 2018-09-15 stsp else if (n != sizeof(*h->trailer)) {
317 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
321 0cb74cf4 2018-07-08 stsp if (verify) {
322 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, h->trailer->packfile_sha1, SHA1_DIGEST_LENGTH);
323 0cb74cf4 2018-07-08 stsp SHA1Final(sha1, &ctx);
324 0cb74cf4 2018-07-08 stsp if (memcmp(h->trailer->packidx_sha1, sha1,
325 0cb74cf4 2018-07-08 stsp SHA1_DIGEST_LENGTH) != 0)
326 0cb74cf4 2018-07-08 stsp err = got_error(GOT_ERR_PACKIDX_CSUM);
329 817c5a18 2018-09-09 stsp return err;
332 817c5a18 2018-09-09 stsp const struct got_error *
333 6d5a9006 2020-12-16 yzhong got_packidx_open(struct got_packidx **packidx,
334 6d5a9006 2020-12-16 yzhong int dir_fd, const char *relpath, int verify)
336 817c5a18 2018-09-09 stsp const struct got_error *err = NULL;
337 1124fe40 2021-07-07 stsp struct got_packidx *p = NULL;
338 1124fe40 2021-07-07 stsp char *pack_relpath;
339 c3564dfa 2021-07-15 stsp struct stat idx_sb, pack_sb;
341 817c5a18 2018-09-09 stsp *packidx = NULL;
343 1124fe40 2021-07-07 stsp err = got_packidx_get_packfile_path(&pack_relpath, relpath);
345 1124fe40 2021-07-07 stsp return err;
348 1124fe40 2021-07-07 stsp * Ensure that a corresponding pack file exists.
349 1124fe40 2021-07-07 stsp * Some Git repositories have this problem. Git seems to ignore
350 1124fe40 2021-07-07 stsp * the existence of lonely pack index files but we do not.
352 c3564dfa 2021-07-15 stsp if (fstatat(dir_fd, pack_relpath, &pack_sb, 0) == -1) {
353 1124fe40 2021-07-07 stsp if (errno == ENOENT) {
354 1124fe40 2021-07-07 stsp err = got_error_fmt(GOT_ERR_LONELY_PACKIDX,
355 1124fe40 2021-07-07 stsp "%s", relpath);
357 1124fe40 2021-07-07 stsp err = got_error_from_errno2("fstatat", pack_relpath);
361 817c5a18 2018-09-09 stsp p = calloc(1, sizeof(*p));
362 1124fe40 2021-07-07 stsp if (p == NULL) {
363 1124fe40 2021-07-07 stsp err = got_error_from_errno("calloc");
367 6d5a9006 2020-12-16 yzhong p->fd = openat(dir_fd, relpath, O_RDONLY | O_NOFOLLOW);
368 6772cf22 2019-08-28 hiltjo if (p->fd == -1) {
369 6d5a9006 2020-12-16 yzhong err = got_error_from_errno2("openat", relpath);
374 c3564dfa 2021-07-15 stsp if (fstat(p->fd, &idx_sb) != 0) {
375 6d5a9006 2020-12-16 yzhong err = got_error_from_errno2("fstat", relpath);
376 817c5a18 2018-09-09 stsp close(p->fd);
380 c3564dfa 2021-07-15 stsp p->len = idx_sb.st_size;
381 817c5a18 2018-09-09 stsp if (p->len < sizeof(p->hdr)) {
382 817c5a18 2018-09-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
383 817c5a18 2018-09-09 stsp close(p->fd);
388 6d5a9006 2020-12-16 yzhong p->path_packidx = strdup(relpath);
389 817c5a18 2018-09-09 stsp if (p->path_packidx == NULL) {
390 638f9024 2019-05-13 stsp err = got_error_from_errno("strdup");
394 817c5a18 2018-09-09 stsp #ifndef GOT_PACK_NO_MMAP
395 817c5a18 2018-09-09 stsp p->map = mmap(NULL, p->len, PROT_READ, MAP_PRIVATE, p->fd, 0);
396 3a11398b 2019-02-21 stsp if (p->map == MAP_FAILED) {
397 3a11398b 2019-02-21 stsp if (errno != ENOMEM) {
398 638f9024 2019-05-13 stsp err = got_error_from_errno("mmap");
401 817c5a18 2018-09-09 stsp p->map = NULL; /* fall back to read(2) */
405 c3564dfa 2021-07-15 stsp err = got_packidx_init_hdr(p, verify, pack_sb.st_size);
409 1124fe40 2021-07-07 stsp got_packidx_close(p);
411 0a0a3048 2018-01-10 stsp *packidx = p;
412 1124fe40 2021-07-07 stsp free(pack_relpath);
413 0a0a3048 2018-01-10 stsp return err;
416 57b35b75 2018-06-22 stsp const struct got_error *
417 6fd11751 2018-06-04 stsp got_packidx_close(struct got_packidx *packidx)
419 57b35b75 2018-06-22 stsp const struct got_error *err = NULL;
421 6fd11751 2018-06-04 stsp free(packidx->path_packidx);
422 fc79a48d 2018-07-09 stsp if (packidx->map) {
423 57b35b75 2018-06-22 stsp if (munmap(packidx->map, packidx->len) == -1)
424 638f9024 2019-05-13 stsp err = got_error_from_errno("munmap");
426 fc79a48d 2018-07-09 stsp free(packidx->hdr.magic);
427 fc79a48d 2018-07-09 stsp free(packidx->hdr.version);
428 fc79a48d 2018-07-09 stsp free(packidx->hdr.fanout_table);
429 fc79a48d 2018-07-09 stsp free(packidx->hdr.sorted_ids);
430 fc79a48d 2018-07-09 stsp free(packidx->hdr.crc32);
431 fc79a48d 2018-07-09 stsp free(packidx->hdr.offsets);
432 fc79a48d 2018-07-09 stsp free(packidx->hdr.large_offsets);
433 fc79a48d 2018-07-09 stsp free(packidx->hdr.trailer);
435 08578a35 2021-01-22 stsp if (close(packidx->fd) == -1 && err == NULL)
436 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
437 0a0a3048 2018-01-10 stsp free(packidx);
439 57b35b75 2018-06-22 stsp return err;
442 509c9973 2021-04-10 stsp const struct got_error *
443 aea75d87 2021-07-06 stsp got_packidx_get_packfile_path(char **path_packfile, const char *path_packidx)
445 509c9973 2021-04-10 stsp size_t size;
447 509c9973 2021-04-10 stsp /* Packfile path contains ".pack" instead of ".idx", so add one byte. */
448 aea75d87 2021-07-06 stsp size = strlen(path_packidx) + 2;
449 509c9973 2021-04-10 stsp if (size < GOT_PACKFILE_NAMELEN + 1)
450 aea75d87 2021-07-06 stsp return got_error_path(path_packidx, GOT_ERR_BAD_PATH);
452 509c9973 2021-04-10 stsp *path_packfile = malloc(size);
453 509c9973 2021-04-10 stsp if (*path_packfile == NULL)
454 509c9973 2021-04-10 stsp return got_error_from_errno("malloc");
456 509c9973 2021-04-10 stsp /* Copy up to and excluding ".idx". */
457 aea75d87 2021-07-06 stsp if (strlcpy(*path_packfile, path_packidx,
458 509c9973 2021-04-10 stsp size - strlen(GOT_PACKIDX_SUFFIX) - 1) >= size)
459 509c9973 2021-04-10 stsp return got_error(GOT_ERR_NO_SPACE);
461 509c9973 2021-04-10 stsp if (strlcat(*path_packfile, GOT_PACKFILE_SUFFIX, size) >= size)
462 509c9973 2021-04-10 stsp return got_error(GOT_ERR_NO_SPACE);
464 509c9973 2021-04-10 stsp return NULL;
468 02828bfd 2021-06-22 stsp got_packidx_get_object_offset(struct got_packidx *packidx, int idx)
470 78fb0967 2020-09-09 naddy uint32_t offset = be32toh(packidx->hdr.offsets[idx]);
471 a1fd68d8 2018-01-12 stsp if (offset & GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX) {
472 a1fd68d8 2018-01-12 stsp uint64_t loffset;
473 a1fd68d8 2018-01-12 stsp idx = offset & GOT_PACKIDX_OFFSET_VAL_MASK;
474 5e6be232 2019-11-08 stsp if (idx < 0 || idx >= packidx->nlargeobj ||
475 6fd11751 2018-06-04 stsp packidx->hdr.large_offsets == NULL)
477 78fb0967 2020-09-09 naddy loffset = be64toh(packidx->hdr.large_offsets[idx]);
478 a1fd68d8 2018-01-12 stsp return (loffset > INT64_MAX ? -1 : (off_t)loffset);
480 a1fd68d8 2018-01-12 stsp return (off_t)(offset & GOT_PACKIDX_OFFSET_VAL_MASK);
484 00927983 2020-04-19 stsp got_packidx_get_object_idx(struct got_packidx *packidx, 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 5a17689a 2020-09-24 stsp uint32_t i;
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 78fb0967 2020-09-09 naddy i = be32toh(packidx->hdr.fanout_table[id0 - 1]);
535 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[i];
536 4277420a 2019-06-29 stsp while (i < totobj && oid->sha1[0] == id0) {
537 4277420a 2019-06-29 stsp char id_str[SHA1_DIGEST_STRING_LENGTH];
538 dd88155e 2019-06-29 stsp struct got_object_qid *qid;
541 4277420a 2019-06-29 stsp if (!got_sha1_digest_to_str(oid->sha1, id_str, sizeof(id_str)))
542 4277420a 2019-06-29 stsp return got_error(GOT_ERR_NO_SPACE);
544 4277420a 2019-06-29 stsp cmp = strncmp(id_str, id_str_prefix, prefix_len);
545 4277420a 2019-06-29 stsp if (cmp < 0) {
546 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[++i];
548 4277420a 2019-06-29 stsp } else if (cmp > 0)
551 dd88155e 2019-06-29 stsp err = got_object_qid_alloc_partial(&qid);
554 dd88155e 2019-06-29 stsp memcpy(qid->id->sha1, oid->sha1, SHA1_DIGEST_LENGTH);
555 dbdddfee 2021-06-23 naddy STAILQ_INSERT_TAIL(matched_ids, qid, entry);
557 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[++i];
561 0adc7bcc 2019-06-29 stsp got_object_id_queue_free(matched_ids);
562 dd88155e 2019-06-29 stsp return err;
565 b4f37570 2021-06-19 stsp static const struct got_error *
566 b4f37570 2021-06-19 stsp pack_stop_privsep_child(struct got_pack *pack)
568 96732e0b 2018-11-11 stsp const struct got_error *err = NULL;
570 876c234b 2018-09-10 stsp if (pack->privsep_child == NULL)
571 876c234b 2018-09-10 stsp return NULL;
573 876c234b 2018-09-10 stsp err = got_privsep_send_stop(pack->privsep_child->imsg_fd);
575 96732e0b 2018-11-11 stsp return err;
576 96732e0b 2018-11-11 stsp err = got_privsep_wait_for_child(pack->privsep_child->pid);
577 08578a35 2021-01-22 stsp if (close(pack->privsep_child->imsg_fd) == -1 && err == NULL)
578 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
579 cc2a8ef4 2021-06-19 tracey imsg_clear(pack->privsep_child->ibuf);
580 cc2a8ef4 2021-06-19 tracey free(pack->privsep_child->ibuf);
581 876c234b 2018-09-10 stsp free(pack->privsep_child);
582 876c234b 2018-09-10 stsp pack->privsep_child = NULL;
583 876c234b 2018-09-10 stsp return err;
586 d7464085 2018-07-09 stsp const struct got_error *
587 7e656b93 2018-03-17 stsp got_pack_close(struct got_pack *pack)
589 d7464085 2018-07-09 stsp const struct got_error *err = NULL;
591 b4f37570 2021-06-19 stsp err = pack_stop_privsep_child(pack);
592 876c234b 2018-09-10 stsp if (pack->map && munmap(pack->map, pack->filesize) == -1 && !err)
593 638f9024 2019-05-13 stsp err = got_error_from_errno("munmap");
594 08578a35 2021-01-22 stsp if (pack->fd != -1 && close(pack->fd) == -1 && err == NULL)
595 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
596 8b2180d4 2018-04-26 stsp pack->fd = -1;
597 4589e373 2018-03-17 stsp free(pack->path_packfile);
598 4589e373 2018-03-17 stsp pack->path_packfile = NULL;
599 4589e373 2018-03-17 stsp pack->filesize = 0;
600 ab2f42e7 2019-11-10 stsp if (pack->delta_cache) {
601 ab2f42e7 2019-11-10 stsp got_delta_cache_free(pack->delta_cache);
602 ab2f42e7 2019-11-10 stsp pack->delta_cache = NULL;
605 c7fe698a 2018-01-23 stsp return err;
608 668a20f6 2020-03-18 stsp const struct got_error *
609 668a20f6 2020-03-18 stsp got_pack_parse_object_type_and_size(uint8_t *type, uint64_t *size, size_t *len,
610 d7464085 2018-07-09 stsp struct got_pack *pack, off_t offset)
612 a487c1d0 2018-01-14 stsp uint8_t t = 0;
613 a487c1d0 2018-01-14 stsp uint64_t s = 0;
614 a487c1d0 2018-01-14 stsp uint8_t sizeN;
615 d7464085 2018-07-09 stsp size_t mapoff = 0;
620 d7464085 2018-07-09 stsp if (offset >= pack->filesize)
621 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
623 d7464085 2018-07-09 stsp if (pack->map) {
624 d7464085 2018-07-09 stsp mapoff = (size_t)offset;
626 d7464085 2018-07-09 stsp if (lseek(pack->fd, offset, SEEK_SET) == -1)
627 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
631 a1fd68d8 2018-01-12 stsp /* We do not support size values which don't fit in 64 bit. */
633 a487c1d0 2018-01-14 stsp return got_error(GOT_ERR_NO_SPACE);
635 d7464085 2018-07-09 stsp if (pack->map) {
636 d7464085 2018-07-09 stsp sizeN = *(pack->map + mapoff);
637 d7464085 2018-07-09 stsp mapoff += sizeof(sizeN);
639 d7464085 2018-07-09 stsp ssize_t n = read(pack->fd, &sizeN, sizeof(sizeN));
641 638f9024 2019-05-13 stsp return got_error_from_errno("read");
642 d7464085 2018-07-09 stsp if (n != sizeof(sizeN))
643 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
645 d7464085 2018-07-09 stsp *len += sizeof(sizeN);
647 a1fd68d8 2018-01-12 stsp if (i == 0) {
648 a487c1d0 2018-01-14 stsp t = (sizeN & GOT_PACK_OBJ_SIZE0_TYPE_MASK) >>
649 a1fd68d8 2018-01-12 stsp GOT_PACK_OBJ_SIZE0_TYPE_MASK_SHIFT;
650 a487c1d0 2018-01-14 stsp s = (sizeN & GOT_PACK_OBJ_SIZE0_VAL_MASK);
652 a1fd68d8 2018-01-12 stsp size_t shift = 4 + 7 * (i - 1);
653 a487c1d0 2018-01-14 stsp s |= ((sizeN & GOT_PACK_OBJ_SIZE_VAL_MASK) << shift);
656 a1fd68d8 2018-01-12 stsp } while (sizeN & GOT_PACK_OBJ_SIZE_MORE);
660 a487c1d0 2018-01-14 stsp return NULL;
663 a1fd68d8 2018-01-12 stsp static const struct got_error *
664 5f25cc85 2019-11-26 stsp open_plain_object(struct got_object **obj, struct got_object_id *id,
665 5f25cc85 2019-11-26 stsp uint8_t type, off_t offset, size_t size, int idx)
667 6ccb713b 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
668 6ccb713b 2018-01-19 stsp if (*obj == NULL)
669 638f9024 2019-05-13 stsp return got_error_from_errno("calloc");
671 6ccb713b 2018-01-19 stsp (*obj)->type = type;
672 6ccb713b 2018-01-19 stsp (*obj)->flags = GOT_OBJ_FLAG_PACKED;
673 c59b3346 2018-09-11 stsp (*obj)->pack_idx = idx;
674 6ccb713b 2018-01-19 stsp (*obj)->hdrlen = 0;
675 6ccb713b 2018-01-19 stsp (*obj)->size = size;
676 106807b4 2018-09-15 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
677 6ccb713b 2018-01-19 stsp (*obj)->pack_offset = offset;
679 b107e67f 2018-01-19 stsp return NULL;
682 b107e67f 2018-01-19 stsp static const struct got_error *
683 d7464085 2018-07-09 stsp parse_negative_offset(int64_t *offset, size_t *len, struct got_pack *pack,
684 d7464085 2018-07-09 stsp off_t delta_offset)
686 b107e67f 2018-01-19 stsp int64_t o = 0;
687 b107e67f 2018-01-19 stsp uint8_t offN;
690 a0de39f3 2019-08-09 stsp *offset = 0;
694 b107e67f 2018-01-19 stsp /* We do not support offset values which don't fit in 64 bit. */
696 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_NO_SPACE);
698 d7464085 2018-07-09 stsp if (pack->map) {
699 d7464085 2018-07-09 stsp size_t mapoff;
700 d7464085 2018-07-09 stsp if (delta_offset >= pack->filesize)
701 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
702 d7464085 2018-07-09 stsp mapoff = (size_t)delta_offset + *len;
703 d7464085 2018-07-09 stsp offN = *(pack->map + mapoff);
706 d7464085 2018-07-09 stsp n = read(pack->fd, &offN, sizeof(offN));
708 638f9024 2019-05-13 stsp return got_error_from_errno("read");
709 d7464085 2018-07-09 stsp if (n != sizeof(offN))
710 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
712 d7464085 2018-07-09 stsp *len += sizeof(offN);
714 b107e67f 2018-01-19 stsp if (i == 0)
715 b107e67f 2018-01-19 stsp o = (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
719 cecc778e 2018-01-23 stsp o += (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
722 b107e67f 2018-01-19 stsp } while (offN & GOT_PACK_OBJ_DELTA_OFF_MORE);
724 b107e67f 2018-01-19 stsp *offset = o;
725 6ccb713b 2018-01-19 stsp return NULL;
728 668a20f6 2020-03-18 stsp const struct got_error *
729 668a20f6 2020-03-18 stsp got_pack_parse_offset_delta(off_t *base_offset, size_t *len, struct got_pack *pack,
730 d7464085 2018-07-09 stsp off_t offset, int tslen)
732 96f5e8b3 2018-01-23 stsp const struct got_error *err;
733 b107e67f 2018-01-19 stsp int64_t negoffset;
734 b107e67f 2018-01-19 stsp size_t negofflen;
738 d7464085 2018-07-09 stsp err = parse_negative_offset(&negoffset, &negofflen, pack,
739 d7464085 2018-07-09 stsp offset + tslen);
741 b107e67f 2018-01-19 stsp return err;
743 b107e67f 2018-01-19 stsp /* Compute the base object's offset (must be in the same pack file). */
744 96f5e8b3 2018-01-23 stsp *base_offset = (offset - negoffset);
745 96f5e8b3 2018-01-23 stsp if (*base_offset <= 0)
746 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_BAD_PACKFILE);
748 d7464085 2018-07-09 stsp *len = negofflen;
749 96f5e8b3 2018-01-23 stsp return NULL;
752 0e22967e 2018-02-11 stsp static const struct got_error *
753 42c69117 2019-11-10 stsp read_delta_data(uint8_t **delta_buf, size_t *delta_len,
754 42c69117 2019-11-10 stsp size_t delta_data_offset, struct got_pack *pack)
756 42c69117 2019-11-10 stsp const struct got_error *err = NULL;
758 42c69117 2019-11-10 stsp if (pack->map) {
759 42c69117 2019-11-10 stsp if (delta_data_offset >= pack->filesize)
760 42c69117 2019-11-10 stsp return got_error(GOT_ERR_PACK_OFFSET);
761 2e5a6fad 2020-03-18 stsp err = got_inflate_to_mem_mmap(delta_buf, delta_len,
762 2e5a6fad 2020-03-18 stsp NULL, NULL, pack->map, delta_data_offset,
763 2e5a6fad 2020-03-18 stsp pack->filesize - delta_data_offset);
765 42c69117 2019-11-10 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET) == -1)
766 42c69117 2019-11-10 stsp return got_error_from_errno("lseek");
767 3ab5e33c 2020-03-18 stsp err = got_inflate_to_mem_fd(delta_buf, delta_len, NULL,
768 55fdd257 2020-03-18 stsp NULL, 0, pack->fd);
770 42c69117 2019-11-10 stsp return err;
773 96f5e8b3 2018-01-23 stsp static const struct got_error *
774 c336f889 2018-07-23 stsp add_delta(struct got_delta_chain *deltas, off_t delta_offset, size_t tslen,
775 42c69117 2019-11-10 stsp int delta_type, size_t delta_size, size_t delta_data_offset)
777 bdd2fbb3 2018-02-11 stsp struct got_delta *delta;
779 c336f889 2018-07-23 stsp delta = got_delta_open(delta_offset, tslen, delta_type, delta_size,
780 42c69117 2019-11-10 stsp delta_data_offset);
781 bdd2fbb3 2018-02-11 stsp if (delta == NULL)
782 638f9024 2019-05-13 stsp return got_error_from_errno("got_delta_open");
783 bdd2fbb3 2018-02-11 stsp /* delta is freed in got_object_close() */
784 bdd2fbb3 2018-02-11 stsp deltas->nentries++;
785 dbdddfee 2021-06-23 naddy STAILQ_INSERT_HEAD(&deltas->entries, delta, entry);
786 bdd2fbb3 2018-02-11 stsp return NULL;
789 bdd2fbb3 2018-02-11 stsp static const struct got_error *
790 6b9c9673 2018-01-23 stsp resolve_offset_delta(struct got_delta_chain *deltas,
791 c8ecd499 2018-09-09 stsp struct got_packidx *packidx, struct got_pack *pack, off_t delta_offset,
792 c8ecd499 2018-09-09 stsp size_t tslen, int delta_type, size_t delta_size, unsigned int recursion)
795 a3500804 2018-01-23 stsp const struct got_error *err;
796 c3703302 2018-01-23 stsp off_t base_offset;
797 c3703302 2018-01-23 stsp uint8_t base_type;
798 c3703302 2018-01-23 stsp uint64_t base_size;
799 c3703302 2018-01-23 stsp size_t base_tslen;
800 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
801 42c69117 2019-11-10 stsp size_t consumed;
803 668a20f6 2020-03-18 stsp err = got_pack_parse_offset_delta(&base_offset, &consumed, pack,
804 d7464085 2018-07-09 stsp delta_offset, tslen);
806 a3500804 2018-01-23 stsp return err;
808 d7464085 2018-07-09 stsp delta_data_offset = delta_offset + tslen + consumed;
809 d7464085 2018-07-09 stsp if (delta_data_offset >= pack->filesize)
810 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
812 d7464085 2018-07-09 stsp if (pack->map == NULL) {
813 d7464085 2018-07-09 stsp delta_data_offset = lseek(pack->fd, 0, SEEK_CUR);
814 d7464085 2018-07-09 stsp if (delta_data_offset == -1)
815 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
818 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type, delta_size,
819 42c69117 2019-11-10 stsp delta_data_offset);
821 1a35c1bc 2019-05-22 stsp return err;
823 c3703302 2018-01-23 stsp /* An offset delta must be in the same packfile. */
824 1a35c1bc 2019-05-22 stsp if (base_offset >= pack->filesize)
825 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_PACK_OFFSET);
827 668a20f6 2020-03-18 stsp err = got_pack_parse_object_type_and_size(&base_type, &base_size,
828 668a20f6 2020-03-18 stsp &base_tslen, pack, base_offset);
830 1a35c1bc 2019-05-22 stsp return err;
832 668a20f6 2020-03-18 stsp return got_pack_resolve_delta_chain(deltas, packidx, pack, base_offset,
833 b0e2201a 2018-06-22 stsp base_tslen, base_type, base_size, recursion - 1);
836 c4330eff 2021-06-22 stsp const struct got_error *
837 c4330eff 2021-06-22 stsp got_pack_parse_ref_delta(struct got_object_id *id,
838 c4330eff 2021-06-22 stsp struct got_pack *pack, off_t delta_offset, int tslen)
840 c4330eff 2021-06-22 stsp if (pack->map) {
841 c4330eff 2021-06-22 stsp size_t mapoff = delta_offset + tslen;
842 c4330eff 2021-06-22 stsp memcpy(id, pack->map + mapoff, sizeof(*id));
845 c4330eff 2021-06-22 stsp n = read(pack->fd, id, sizeof(*id));
847 c4330eff 2021-06-22 stsp return got_error_from_errno("read");
848 c4330eff 2021-06-22 stsp if (n != sizeof(*id))
849 c4330eff 2021-06-22 stsp return got_error(GOT_ERR_BAD_PACKFILE);
852 c4330eff 2021-06-22 stsp return NULL;
855 c3703302 2018-01-23 stsp static const struct got_error *
856 c8ecd499 2018-09-09 stsp resolve_ref_delta(struct got_delta_chain *deltas, struct got_packidx *packidx,
857 c8ecd499 2018-09-09 stsp struct got_pack *pack, off_t delta_offset, size_t tslen, int delta_type,
858 c8ecd499 2018-09-09 stsp size_t delta_size, unsigned int recursion)
860 6b9c9673 2018-01-23 stsp const struct got_error *err;
861 6b9c9673 2018-01-23 stsp struct got_object_id id;
863 6b9c9673 2018-01-23 stsp off_t base_offset;
864 6b9c9673 2018-01-23 stsp uint8_t base_type;
865 6b9c9673 2018-01-23 stsp uint64_t base_size;
866 6b9c9673 2018-01-23 stsp size_t base_tslen;
867 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
869 42c69117 2019-11-10 stsp if (delta_offset + tslen >= pack->filesize)
870 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
872 c4330eff 2021-06-22 stsp err = got_pack_parse_ref_delta(&id, pack, delta_offset, tslen);
874 c4330eff 2021-06-22 stsp return err;
875 d7464085 2018-07-09 stsp if (pack->map) {
876 c4330eff 2021-06-22 stsp delta_data_offset = delta_offset + tslen + sizeof(id);
878 e40b19ed 2020-01-06 stsp delta_data_offset = lseek(pack->fd, 0, SEEK_CUR);
879 e40b19ed 2020-01-06 stsp if (delta_data_offset == -1)
880 e40b19ed 2020-01-06 stsp return got_error_from_errno("lseek");
883 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type, delta_size,
884 42c69117 2019-11-10 stsp delta_data_offset);
886 1a35c1bc 2019-05-22 stsp return err;
888 652b2703 2018-06-22 stsp /* Delta base must be in the same pack file. */
889 1510f469 2018-09-09 stsp idx = got_packidx_get_object_idx(packidx, &id);
890 1a35c1bc 2019-05-22 stsp if (idx == -1)
891 668a20f6 2020-03-18 stsp return got_error(GOT_ERR_NO_OBJ);
893 02828bfd 2021-06-22 stsp base_offset = got_packidx_get_object_offset(packidx, idx);
894 1a35c1bc 2019-05-22 stsp if (base_offset == (uint64_t)-1)
895 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_BAD_PACKIDX);
897 1a35c1bc 2019-05-22 stsp if (base_offset >= pack->filesize)
898 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_PACK_OFFSET);
900 668a20f6 2020-03-18 stsp err = got_pack_parse_object_type_and_size(&base_type, &base_size,
901 668a20f6 2020-03-18 stsp &base_tslen, pack, base_offset);
903 1a35c1bc 2019-05-22 stsp return err;
905 668a20f6 2020-03-18 stsp return got_pack_resolve_delta_chain(deltas, packidx, pack, base_offset,
906 0c048b15 2018-04-27 stsp base_tslen, base_type, base_size, recursion - 1);
909 668a20f6 2020-03-18 stsp const struct got_error *
910 668a20f6 2020-03-18 stsp got_pack_resolve_delta_chain(struct got_delta_chain *deltas,
911 668a20f6 2020-03-18 stsp struct got_packidx *packidx, struct got_pack *pack, off_t delta_offset,
912 668a20f6 2020-03-18 stsp size_t tslen, int delta_type, size_t delta_size, unsigned int recursion)
914 c3703302 2018-01-23 stsp const struct got_error *err = NULL;
916 5b7e13a7 2018-04-02 stsp if (--recursion == 0)
917 5b7e13a7 2018-04-02 stsp return got_error(GOT_ERR_RECURSION);
919 c3703302 2018-01-23 stsp switch (delta_type) {
920 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_COMMIT:
921 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TREE:
922 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_BLOB:
923 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TAG:
924 c3703302 2018-01-23 stsp /* Plain types are the final delta base. Recursion ends. */
925 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type,
926 42c69117 2019-11-10 stsp delta_size, 0);
928 a3500804 2018-01-23 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
929 c8ecd499 2018-09-09 stsp err = resolve_offset_delta(deltas, packidx, pack,
930 b0e2201a 2018-06-22 stsp delta_offset, tslen, delta_type, delta_size, recursion - 1);
932 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_REF_DELTA:
933 c8ecd499 2018-09-09 stsp err = resolve_ref_delta(deltas, packidx, pack,
934 b0e2201a 2018-06-22 stsp delta_offset, tslen, delta_type, delta_size, recursion - 1);
937 4810de4a 2018-04-01 stsp return got_error(GOT_ERR_OBJ_TYPE);
940 96f5e8b3 2018-01-23 stsp return err;
943 96f5e8b3 2018-01-23 stsp static const struct got_error *
944 a98c62b1 2018-09-09 stsp open_delta_object(struct got_object **obj, struct got_packidx *packidx,
945 a98c62b1 2018-09-09 stsp struct got_pack *pack, struct got_object_id *id, off_t offset,
946 c59b3346 2018-09-11 stsp size_t tslen, int delta_type, size_t delta_size, int idx)
948 96f5e8b3 2018-01-23 stsp const struct got_error *err = NULL;
949 96f5e8b3 2018-01-23 stsp int resolved_type;
951 b107e67f 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
952 b107e67f 2018-01-19 stsp if (*obj == NULL)
953 638f9024 2019-05-13 stsp return got_error_from_errno("calloc");
955 96f5e8b3 2018-01-23 stsp (*obj)->flags = 0;
956 b107e67f 2018-01-19 stsp (*obj)->hdrlen = 0;
957 39e73dc9 2018-03-03 stsp (*obj)->size = 0; /* Not known because deltas aren't applied yet. */
958 106807b4 2018-09-15 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
959 cecc778e 2018-01-23 stsp (*obj)->pack_offset = offset + tslen;
961 dbdddfee 2021-06-23 naddy STAILQ_INIT(&(*obj)->deltas.entries);
962 1a35c1bc 2019-05-22 stsp (*obj)->flags |= GOT_OBJ_FLAG_DELTIFIED;
963 96f5e8b3 2018-01-23 stsp (*obj)->flags |= GOT_OBJ_FLAG_PACKED;
964 c59b3346 2018-09-11 stsp (*obj)->pack_idx = idx;
966 668a20f6 2020-03-18 stsp err = got_pack_resolve_delta_chain(&(*obj)->deltas, packidx, pack,
967 668a20f6 2020-03-18 stsp offset, tslen, delta_type, delta_size,
968 668a20f6 2020-03-18 stsp GOT_DELTA_CHAIN_RECURSION_MAX);
972 96f5e8b3 2018-01-23 stsp err = got_delta_chain_get_base_type(&resolved_type, &(*obj)->deltas);
975 96f5e8b3 2018-01-23 stsp (*obj)->type = resolved_type;
978 96f5e8b3 2018-01-23 stsp got_object_close(*obj);
979 96f5e8b3 2018-01-23 stsp *obj = NULL;
981 96f5e8b3 2018-01-23 stsp return err;
984 2090a03d 2018-09-09 stsp const struct got_error *
985 2090a03d 2018-09-09 stsp got_packfile_open_object(struct got_object **obj, struct got_pack *pack,
986 6fd11751 2018-06-04 stsp struct got_packidx *packidx, int idx, struct got_object_id *id)
988 a1fd68d8 2018-01-12 stsp const struct got_error *err = NULL;
989 a1fd68d8 2018-01-12 stsp off_t offset;
990 6c00b545 2018-01-17 stsp uint8_t type;
991 6c00b545 2018-01-17 stsp uint64_t size;
992 3ee5fc21 2018-01-17 stsp size_t tslen;
994 6c00b545 2018-01-17 stsp *obj = NULL;
996 02828bfd 2021-06-22 stsp offset = got_packidx_get_object_offset(packidx, idx);
997 a1fd68d8 2018-01-12 stsp if (offset == (uint64_t)-1)
998 a1fd68d8 2018-01-12 stsp return got_error(GOT_ERR_BAD_PACKIDX);
1000 668a20f6 2020-03-18 stsp err = got_pack_parse_object_type_and_size(&type, &size, &tslen,
1001 668a20f6 2020-03-18 stsp pack, offset);
1003 35c73765 2018-09-09 stsp return err;
1005 6c00b545 2018-01-17 stsp switch (type) {
1006 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_COMMIT:
1007 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_TREE:
1008 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_BLOB:
1009 d33fc9ef 2018-01-23 stsp case GOT_OBJ_TYPE_TAG:
1010 5f25cc85 2019-11-26 stsp err = open_plain_object(obj, id, type, offset + tslen,
1011 5f25cc85 2019-11-26 stsp size, idx);
1013 b107e67f 2018-01-19 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
1014 a48db7e5 2018-01-23 stsp case GOT_OBJ_TYPE_REF_DELTA:
1015 a98c62b1 2018-09-09 stsp err = open_delta_object(obj, packidx, pack, id, offset,
1016 c59b3346 2018-09-11 stsp tslen, type, size, idx);
1019 4810de4a 2018-04-01 stsp err = got_error(GOT_ERR_OBJ_TYPE);
1023 3ee5fc21 2018-01-17 stsp return err;
1026 d582f26c 2020-03-18 stsp const struct got_error *
1027 d582f26c 2020-03-18 stsp got_pack_get_delta_chain_max_size(uint64_t *max_size, struct got_delta_chain *deltas,
1028 42c69117 2019-11-10 stsp struct got_pack *pack)
1030 22484865 2018-03-13 stsp struct got_delta *delta;
1031 22484865 2018-03-13 stsp uint64_t base_size = 0, result_size = 0;
1033 22484865 2018-03-13 stsp *max_size = 0;
1034 dbdddfee 2021-06-23 naddy STAILQ_FOREACH(delta, &deltas->entries, entry) {
1035 22484865 2018-03-13 stsp /* Plain object types are the delta base. */
1036 22484865 2018-03-13 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1037 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1038 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1039 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1040 22484865 2018-03-13 stsp const struct got_error *err;
1041 42c69117 2019-11-10 stsp uint8_t *delta_buf;
1042 42c69117 2019-11-10 stsp size_t delta_len;
1043 ab2f42e7 2019-11-10 stsp int cached = 1;
1045 ab2f42e7 2019-11-10 stsp got_delta_cache_get(&delta_buf, &delta_len,
1046 ab2f42e7 2019-11-10 stsp pack->delta_cache, delta->data_offset);
1047 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1048 ab2f42e7 2019-11-10 stsp cached = 0;
1049 ab2f42e7 2019-11-10 stsp err = read_delta_data(&delta_buf, &delta_len,
1050 ab2f42e7 2019-11-10 stsp delta->data_offset, pack);
1052 ab2f42e7 2019-11-10 stsp return err;
1053 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1054 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1055 ab2f42e7 2019-11-10 stsp if (err == NULL)
1056 ab2f42e7 2019-11-10 stsp cached = 1;
1057 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1058 ab2f42e7 2019-11-10 stsp free(delta_buf);
1059 ab2f42e7 2019-11-10 stsp return err;
1062 a53d2f13 2018-03-17 stsp err = got_delta_get_sizes(&base_size, &result_size,
1063 42c69117 2019-11-10 stsp delta_buf, delta_len);
1064 ab2f42e7 2019-11-10 stsp if (!cached)
1065 ab2f42e7 2019-11-10 stsp free(delta_buf);
1067 22484865 2018-03-13 stsp return err;
1069 22484865 2018-03-13 stsp base_size = delta->size;
1070 22484865 2018-03-13 stsp if (base_size > *max_size)
1071 22484865 2018-03-13 stsp *max_size = base_size;
1072 22484865 2018-03-13 stsp if (result_size > *max_size)
1073 22484865 2018-03-13 stsp *max_size = result_size;
1076 9feb4ff2 2018-03-14 stsp return NULL;
1079 ac544f8c 2019-01-13 stsp const struct got_error *
1080 42c69117 2019-11-10 stsp got_pack_get_max_delta_object_size(uint64_t *size, struct got_object *obj,
1081 42c69117 2019-11-10 stsp struct got_pack *pack)
1083 85a703fa 2019-01-13 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0)
1084 85a703fa 2019-01-13 stsp return got_error(GOT_ERR_OBJ_TYPE);
1086 d582f26c 2020-03-18 stsp return got_pack_get_delta_chain_max_size(size, &obj->deltas, pack);
1089 668a20f6 2020-03-18 stsp const struct got_error *
1090 4788f1ce 2020-03-18 stsp got_pack_dump_delta_chain_to_file(size_t *result_size,
1091 4788f1ce 2020-03-18 stsp struct got_delta_chain *deltas, struct got_pack *pack, FILE *outfile,
1092 4788f1ce 2020-03-18 stsp FILE *base_file, FILE *accum_file)
1094 efd2a263 2018-01-19 stsp const struct got_error *err = NULL;
1095 6691714a 2018-01-23 stsp struct got_delta *delta;
1096 42c69117 2019-11-10 stsp uint8_t *base_buf = NULL, *accum_buf = NULL, *delta_buf;
1097 42c69117 2019-11-10 stsp size_t base_bufsz = 0, accum_size = 0, delta_len;
1098 22484865 2018-03-13 stsp uint64_t max_size;
1099 6691714a 2018-01-23 stsp int n = 0;
1101 b29656e2 2018-03-16 stsp *result_size = 0;
1103 dbdddfee 2021-06-23 naddy if (STAILQ_EMPTY(&deltas->entries))
1104 6691714a 2018-01-23 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
1106 8628c62d 2018-03-15 stsp /* We process small enough files entirely in memory for speed. */
1107 d582f26c 2020-03-18 stsp err = got_pack_get_delta_chain_max_size(&max_size, deltas, pack);
1109 22484865 2018-03-13 stsp return err;
1110 8628c62d 2018-03-15 stsp if (max_size < GOT_DELTA_RESULT_SIZE_CACHED_MAX) {
1111 8628c62d 2018-03-15 stsp accum_buf = malloc(max_size);
1112 8628c62d 2018-03-15 stsp if (accum_buf == NULL)
1113 638f9024 2019-05-13 stsp return got_error_from_errno("malloc");
1114 3840f4c9 2018-09-12 stsp base_file = NULL;
1115 3840f4c9 2018-09-12 stsp accum_file = NULL;
1118 6691714a 2018-01-23 stsp /* Deltas are ordered in ascending order. */
1119 dbdddfee 2021-06-23 naddy STAILQ_FOREACH(delta, &deltas->entries, entry) {
1120 ab2f42e7 2019-11-10 stsp int cached = 1;
1121 a6b158cc 2018-02-11 stsp if (n == 0) {
1122 34fca9c3 2018-11-11 stsp size_t mapoff;
1123 0c048b15 2018-04-27 stsp off_t delta_data_offset;
1125 a6b158cc 2018-02-11 stsp /* Plain object types are the delta base. */
1126 a6b158cc 2018-02-11 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1127 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1128 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1129 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1130 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1131 72eb3431 2018-04-01 stsp goto done;
1134 0c048b15 2018-04-27 stsp delta_data_offset = delta->offset + delta->tslen;
1135 0c048b15 2018-04-27 stsp if (delta_data_offset >= pack->filesize) {
1136 0c048b15 2018-04-27 stsp err = got_error(GOT_ERR_PACK_OFFSET);
1137 0c048b15 2018-04-27 stsp goto done;
1139 d7464085 2018-07-09 stsp if (pack->map == NULL) {
1140 d7464085 2018-07-09 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET)
1142 638f9024 2019-05-13 stsp err = got_error_from_errno("lseek");
1143 d7464085 2018-07-09 stsp goto done;
1146 d7464085 2018-07-09 stsp if (base_file) {
1147 d7464085 2018-07-09 stsp if (pack->map) {
1148 d7464085 2018-07-09 stsp mapoff = (size_t)delta_data_offset;
1149 d7464085 2018-07-09 stsp err = got_inflate_to_file_mmap(
1150 4788f1ce 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->map,
1151 4788f1ce 2020-03-18 stsp mapoff, pack->filesize - mapoff,
1152 4788f1ce 2020-03-18 stsp base_file);
1154 34fca9c3 2018-11-11 stsp err = got_inflate_to_file_fd(
1155 4788f1ce 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->fd,
1156 4788f1ce 2020-03-18 stsp base_file);
1158 d7464085 2018-07-09 stsp if (pack->map) {
1159 d7464085 2018-07-09 stsp mapoff = (size_t)delta_data_offset;
1160 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&base_buf,
1161 2e5a6fad 2020-03-18 stsp &base_bufsz, NULL, NULL,
1162 2e5a6fad 2020-03-18 stsp pack->map, mapoff,
1163 d7464085 2018-07-09 stsp pack->filesize - mapoff);
1165 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&base_buf,
1166 55fdd257 2020-03-18 stsp &base_bufsz, NULL, NULL, max_size,
1167 55fdd257 2020-03-18 stsp pack->fd);
1170 a6b158cc 2018-02-11 stsp goto done;
1172 8628c62d 2018-03-15 stsp if (base_file)
1173 8628c62d 2018-03-15 stsp rewind(base_file);
1177 ab2f42e7 2019-11-10 stsp got_delta_cache_get(&delta_buf, &delta_len,
1178 ab2f42e7 2019-11-10 stsp pack->delta_cache, delta->data_offset);
1179 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1180 ab2f42e7 2019-11-10 stsp cached = 0;
1181 ab2f42e7 2019-11-10 stsp err = read_delta_data(&delta_buf, &delta_len,
1182 ab2f42e7 2019-11-10 stsp delta->data_offset, pack);
1184 ab2f42e7 2019-11-10 stsp goto done;
1185 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1186 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1187 ab2f42e7 2019-11-10 stsp if (err == NULL)
1188 ab2f42e7 2019-11-10 stsp cached = 1;
1189 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1190 ab2f42e7 2019-11-10 stsp free(delta_buf);
1191 ab2f42e7 2019-11-10 stsp goto done;
1194 8628c62d 2018-03-15 stsp if (base_buf) {
1195 34fca9c3 2018-11-11 stsp err = got_delta_apply_in_mem(base_buf, base_bufsz,
1196 42c69117 2019-11-10 stsp delta_buf, delta_len, accum_buf,
1197 34fca9c3 2018-11-11 stsp &accum_size, max_size);
1200 42c69117 2019-11-10 stsp err = got_delta_apply(base_file, delta_buf,
1201 42c69117 2019-11-10 stsp delta_len,
1202 8628c62d 2018-03-15 stsp /* Final delta application writes to output file. */
1203 b29656e2 2018-03-16 stsp ++n < deltas->nentries ? accum_file : outfile,
1204 b29656e2 2018-03-16 stsp &accum_size);
1206 ab2f42e7 2019-11-10 stsp if (!cached)
1207 ab2f42e7 2019-11-10 stsp free(delta_buf);
1209 6691714a 2018-01-23 stsp goto done;
1211 710bb5ca 2018-01-23 stsp if (n < deltas->nentries) {
1212 6691714a 2018-01-23 stsp /* Accumulated delta becomes the new base. */
1213 8628c62d 2018-03-15 stsp if (base_buf) {
1214 8628c62d 2018-03-15 stsp uint8_t *tmp = accum_buf;
1216 34fca9c3 2018-11-11 stsp * Base buffer switches roles with accumulation
1217 34fca9c3 2018-11-11 stsp * buffer. Ensure it can hold the largest
1218 34fca9c3 2018-11-11 stsp * result in the delta chain. The initial
1219 34fca9c3 2018-11-11 stsp * allocation might have been smaller.
1221 34fca9c3 2018-11-11 stsp if (base_bufsz < max_size) {
1222 34fca9c3 2018-11-11 stsp uint8_t *p;
1223 34fca9c3 2018-11-11 stsp p = reallocarray(base_buf, 1, max_size);
1224 34fca9c3 2018-11-11 stsp if (p == NULL) {
1225 638f9024 2019-05-13 stsp err = got_error_from_errno(
1226 230a42bd 2019-05-11 jcs "reallocarray");
1227 34fca9c3 2018-11-11 stsp goto done;
1229 34fca9c3 2018-11-11 stsp base_buf = p;
1230 34fca9c3 2018-11-11 stsp base_bufsz = max_size;
1232 8628c62d 2018-03-15 stsp accum_buf = base_buf;
1233 8628c62d 2018-03-15 stsp base_buf = tmp;
1235 8628c62d 2018-03-15 stsp FILE *tmp = accum_file;
1236 8628c62d 2018-03-15 stsp accum_file = base_file;
1237 8628c62d 2018-03-15 stsp base_file = tmp;
1238 8628c62d 2018-03-15 stsp rewind(base_file);
1239 8628c62d 2018-03-15 stsp rewind(accum_file);
1245 8628c62d 2018-03-15 stsp free(base_buf);
1246 8628c62d 2018-03-15 stsp if (accum_buf) {
1247 8628c62d 2018-03-15 stsp size_t len = fwrite(accum_buf, 1, accum_size, outfile);
1248 8628c62d 2018-03-15 stsp free(accum_buf);
1249 8628c62d 2018-03-15 stsp if (len != accum_size)
1250 673702af 2018-07-23 stsp err = got_ferror(outfile, GOT_ERR_IO);
1252 6691714a 2018-01-23 stsp rewind(outfile);
1253 b29656e2 2018-03-16 stsp if (err == NULL)
1254 b29656e2 2018-03-16 stsp *result_size = accum_size;
1255 e0ab43e7 2018-03-16 stsp return err;
1258 668a20f6 2020-03-18 stsp const struct got_error *
1259 668a20f6 2020-03-18 stsp got_pack_dump_delta_chain_to_mem(uint8_t **outbuf, size_t *outlen,
1260 48095039 2018-09-09 stsp struct got_delta_chain *deltas, struct got_pack *pack)
1262 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1263 e0ab43e7 2018-03-16 stsp struct got_delta *delta;
1264 42c69117 2019-11-10 stsp uint8_t *base_buf = NULL, *accum_buf = NULL, *delta_buf;
1265 42c69117 2019-11-10 stsp size_t base_bufsz = 0, accum_size = 0, delta_len;
1266 e0ab43e7 2018-03-16 stsp uint64_t max_size;
1267 e0ab43e7 2018-03-16 stsp int n = 0;
1269 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1270 e0ab43e7 2018-03-16 stsp *outlen = 0;
1272 dbdddfee 2021-06-23 naddy if (STAILQ_EMPTY(&deltas->entries))
1273 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
1275 d582f26c 2020-03-18 stsp err = got_pack_get_delta_chain_max_size(&max_size, deltas, pack);
1277 e0ab43e7 2018-03-16 stsp return err;
1278 e0ab43e7 2018-03-16 stsp accum_buf = malloc(max_size);
1279 e0ab43e7 2018-03-16 stsp if (accum_buf == NULL)
1280 638f9024 2019-05-13 stsp return got_error_from_errno("malloc");
1282 e0ab43e7 2018-03-16 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 e0ab43e7 2018-03-16 stsp if (n == 0) {
1286 0c048b15 2018-04-27 stsp size_t delta_data_offset;
1288 e0ab43e7 2018-03-16 stsp /* Plain object types are the delta base. */
1289 e0ab43e7 2018-03-16 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1290 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1291 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1292 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1293 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1294 72eb3431 2018-04-01 stsp goto done;
1297 0c048b15 2018-04-27 stsp delta_data_offset = delta->offset + delta->tslen;
1298 0c048b15 2018-04-27 stsp if (delta_data_offset >= pack->filesize) {
1299 0c048b15 2018-04-27 stsp err = got_error(GOT_ERR_PACK_OFFSET);
1300 0c048b15 2018-04-27 stsp goto done;
1302 d7464085 2018-07-09 stsp if (pack->map) {
1303 d7464085 2018-07-09 stsp size_t mapoff = (size_t)delta_data_offset;
1304 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&base_buf,
1305 2e5a6fad 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->map,
1306 2e5a6fad 2020-03-18 stsp mapoff, pack->filesize - mapoff);
1308 d7464085 2018-07-09 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET)
1310 638f9024 2019-05-13 stsp err = got_error_from_errno("lseek");
1311 d7464085 2018-07-09 stsp goto done;
1313 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&base_buf,
1314 55fdd257 2020-03-18 stsp &base_bufsz, NULL, NULL, max_size,
1315 55fdd257 2020-03-18 stsp pack->fd);
1318 d7464085 2018-07-09 stsp goto done;
1323 ab2f42e7 2019-11-10 stsp got_delta_cache_get(&delta_buf, &delta_len,
1324 ab2f42e7 2019-11-10 stsp pack->delta_cache, delta->data_offset);
1325 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1326 ab2f42e7 2019-11-10 stsp cached = 0;
1327 ab2f42e7 2019-11-10 stsp err = read_delta_data(&delta_buf, &delta_len,
1328 ab2f42e7 2019-11-10 stsp delta->data_offset, pack);
1330 ab2f42e7 2019-11-10 stsp goto done;
1331 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1332 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1333 ab2f42e7 2019-11-10 stsp if (err == NULL)
1334 ab2f42e7 2019-11-10 stsp cached = 1;
1335 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1336 ab2f42e7 2019-11-10 stsp free(delta_buf);
1337 ab2f42e7 2019-11-10 stsp goto done;
1340 34fca9c3 2018-11-11 stsp err = got_delta_apply_in_mem(base_buf, base_bufsz,
1341 42c69117 2019-11-10 stsp delta_buf, delta_len, accum_buf,
1342 34fca9c3 2018-11-11 stsp &accum_size, max_size);
1343 ab2f42e7 2019-11-10 stsp if (!cached)
1344 ab2f42e7 2019-11-10 stsp free(delta_buf);
1347 e0ab43e7 2018-03-16 stsp goto done;
1349 e0ab43e7 2018-03-16 stsp if (n < deltas->nentries) {
1350 e0ab43e7 2018-03-16 stsp /* Accumulated delta becomes the new base. */
1351 e0ab43e7 2018-03-16 stsp uint8_t *tmp = accum_buf;
1353 34fca9c3 2018-11-11 stsp * Base buffer switches roles with accumulation buffer.
1354 34fca9c3 2018-11-11 stsp * Ensure it can hold the largest result in the delta
1355 34fca9c3 2018-11-11 stsp * chain. Initial allocation might have been smaller.
1357 34fca9c3 2018-11-11 stsp if (base_bufsz < max_size) {
1358 34fca9c3 2018-11-11 stsp uint8_t *p;
1359 34fca9c3 2018-11-11 stsp p = reallocarray(base_buf, 1, max_size);
1360 34fca9c3 2018-11-11 stsp if (p == NULL) {
1361 638f9024 2019-05-13 stsp err = got_error_from_errno(
1362 230a42bd 2019-05-11 jcs "reallocarray");
1363 34fca9c3 2018-11-11 stsp goto done;
1365 34fca9c3 2018-11-11 stsp base_buf = p;
1366 34fca9c3 2018-11-11 stsp base_bufsz = max_size;
1368 e0ab43e7 2018-03-16 stsp accum_buf = base_buf;
1369 e0ab43e7 2018-03-16 stsp base_buf = tmp;
1374 e0ab43e7 2018-03-16 stsp free(base_buf);
1375 e0ab43e7 2018-03-16 stsp if (err) {
1376 e0ab43e7 2018-03-16 stsp free(accum_buf);
1377 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1378 e0ab43e7 2018-03-16 stsp *outlen = 0;
1380 e0ab43e7 2018-03-16 stsp *outbuf = accum_buf;
1381 e0ab43e7 2018-03-16 stsp *outlen = accum_size;
1383 efd2a263 2018-01-19 stsp return err;
1386 3ee5fc21 2018-01-17 stsp const struct got_error *
1387 24140570 2018-09-09 stsp got_packfile_extract_object(struct got_pack *pack, struct got_object *obj,
1388 3840f4c9 2018-09-12 stsp FILE *outfile, FILE *base_file, FILE *accum_file)
1390 3ee5fc21 2018-01-17 stsp const struct got_error *err = NULL;
1392 3ee5fc21 2018-01-17 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1393 3ee5fc21 2018-01-17 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1395 ef2bccd9 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1396 24140570 2018-09-09 stsp if (obj->pack_offset >= pack->filesize)
1397 24140570 2018-09-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1399 d7464085 2018-07-09 stsp if (pack->map) {
1400 d7464085 2018-07-09 stsp size_t mapoff = (size_t)obj->pack_offset;
1401 4788f1ce 2020-03-18 stsp err = got_inflate_to_file_mmap(&obj->size, NULL, NULL,
1402 4788f1ce 2020-03-18 stsp pack->map, mapoff, pack->filesize - mapoff,
1405 24140570 2018-09-09 stsp if (lseek(pack->fd, obj->pack_offset, SEEK_SET) == -1)
1406 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
1407 4788f1ce 2020-03-18 stsp err = got_inflate_to_file_fd(&obj->size, NULL, NULL,
1408 4788f1ce 2020-03-18 stsp pack->fd, outfile);
1411 4788f1ce 2020-03-18 stsp err = got_pack_dump_delta_chain_to_file(&obj->size,
1412 4788f1ce 2020-03-18 stsp &obj->deltas, pack, outfile, base_file, accum_file);
1414 a1fd68d8 2018-01-12 stsp return err;
1417 e0ab43e7 2018-03-16 stsp const struct got_error *
1418 e0ab43e7 2018-03-16 stsp got_packfile_extract_object_to_mem(uint8_t **buf, size_t *len,
1419 7e212e3d 2018-09-09 stsp struct got_object *obj, struct got_pack *pack)
1421 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1423 e0ab43e7 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1424 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1426 48095039 2018-09-09 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1427 7e212e3d 2018-09-09 stsp if (obj->pack_offset >= pack->filesize)
1428 7e212e3d 2018-09-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1429 d7464085 2018-07-09 stsp if (pack->map) {
1430 d7464085 2018-07-09 stsp size_t mapoff = (size_t)obj->pack_offset;
1431 2e5a6fad 2020-03-18 stsp err = got_inflate_to_mem_mmap(buf, len, NULL, NULL,
1432 2e5a6fad 2020-03-18 stsp pack->map, mapoff, pack->filesize - mapoff);
1434 7e212e3d 2018-09-09 stsp if (lseek(pack->fd, obj->pack_offset, SEEK_SET) == -1)
1435 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
1436 1e87a3c3 2020-03-18 stsp err = got_inflate_to_mem_fd(buf, len, NULL, NULL,
1437 55fdd257 2020-03-18 stsp obj->size, pack->fd);
1440 668a20f6 2020-03-18 stsp err = got_pack_dump_delta_chain_to_mem(buf, len, &obj->deltas,
1443 e0ab43e7 2018-03-16 stsp return err;