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);
378 c3564dfa 2021-07-15 stsp if (fstat(p->fd, &idx_sb) != 0) {
379 6d5a9006 2020-12-16 yzhong err = got_error_from_errno2("fstat", relpath);
380 817c5a18 2018-09-09 stsp close(p->fd);
384 c3564dfa 2021-07-15 stsp p->len = idx_sb.st_size;
385 817c5a18 2018-09-09 stsp if (p->len < sizeof(p->hdr)) {
386 817c5a18 2018-09-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
387 817c5a18 2018-09-09 stsp close(p->fd);
392 6d5a9006 2020-12-16 yzhong p->path_packidx = strdup(relpath);
393 817c5a18 2018-09-09 stsp if (p->path_packidx == NULL) {
394 638f9024 2019-05-13 stsp err = got_error_from_errno("strdup");
398 817c5a18 2018-09-09 stsp #ifndef GOT_PACK_NO_MMAP
399 817c5a18 2018-09-09 stsp p->map = mmap(NULL, p->len, PROT_READ, MAP_PRIVATE, p->fd, 0);
400 3a11398b 2019-02-21 stsp if (p->map == MAP_FAILED) {
401 3a11398b 2019-02-21 stsp if (errno != ENOMEM) {
402 638f9024 2019-05-13 stsp err = got_error_from_errno("mmap");
405 817c5a18 2018-09-09 stsp p->map = NULL; /* fall back to read(2) */
409 c3564dfa 2021-07-15 stsp err = got_packidx_init_hdr(p, verify, pack_sb.st_size);
413 1124fe40 2021-07-07 stsp got_packidx_close(p);
415 0a0a3048 2018-01-10 stsp *packidx = p;
416 1124fe40 2021-07-07 stsp free(pack_relpath);
417 0a0a3048 2018-01-10 stsp return err;
420 57b35b75 2018-06-22 stsp const struct got_error *
421 6fd11751 2018-06-04 stsp got_packidx_close(struct got_packidx *packidx)
423 57b35b75 2018-06-22 stsp const struct got_error *err = NULL;
425 6fd11751 2018-06-04 stsp free(packidx->path_packidx);
426 fc79a48d 2018-07-09 stsp if (packidx->map) {
427 57b35b75 2018-06-22 stsp if (munmap(packidx->map, packidx->len) == -1)
428 638f9024 2019-05-13 stsp err = got_error_from_errno("munmap");
430 fc79a48d 2018-07-09 stsp free(packidx->hdr.magic);
431 fc79a48d 2018-07-09 stsp free(packidx->hdr.version);
432 fc79a48d 2018-07-09 stsp free(packidx->hdr.fanout_table);
433 fc79a48d 2018-07-09 stsp free(packidx->hdr.sorted_ids);
434 fc79a48d 2018-07-09 stsp free(packidx->hdr.crc32);
435 fc79a48d 2018-07-09 stsp free(packidx->hdr.offsets);
436 fc79a48d 2018-07-09 stsp free(packidx->hdr.large_offsets);
437 fc79a48d 2018-07-09 stsp free(packidx->hdr.trailer);
439 08578a35 2021-01-22 stsp if (close(packidx->fd) == -1 && err == NULL)
440 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
441 0a0a3048 2018-01-10 stsp free(packidx);
443 57b35b75 2018-06-22 stsp return err;
446 509c9973 2021-04-10 stsp const struct got_error *
447 aea75d87 2021-07-06 stsp got_packidx_get_packfile_path(char **path_packfile, const char *path_packidx)
449 509c9973 2021-04-10 stsp size_t size;
451 509c9973 2021-04-10 stsp /* Packfile path contains ".pack" instead of ".idx", so add one byte. */
452 aea75d87 2021-07-06 stsp size = strlen(path_packidx) + 2;
453 509c9973 2021-04-10 stsp if (size < GOT_PACKFILE_NAMELEN + 1)
454 aea75d87 2021-07-06 stsp return got_error_path(path_packidx, GOT_ERR_BAD_PATH);
456 509c9973 2021-04-10 stsp *path_packfile = malloc(size);
457 509c9973 2021-04-10 stsp if (*path_packfile == NULL)
458 509c9973 2021-04-10 stsp return got_error_from_errno("malloc");
460 509c9973 2021-04-10 stsp /* Copy up to and excluding ".idx". */
461 aea75d87 2021-07-06 stsp if (strlcpy(*path_packfile, path_packidx,
462 509c9973 2021-04-10 stsp size - strlen(GOT_PACKIDX_SUFFIX) - 1) >= size)
463 509c9973 2021-04-10 stsp return got_error(GOT_ERR_NO_SPACE);
465 509c9973 2021-04-10 stsp if (strlcat(*path_packfile, GOT_PACKFILE_SUFFIX, size) >= size)
466 509c9973 2021-04-10 stsp return got_error(GOT_ERR_NO_SPACE);
468 509c9973 2021-04-10 stsp return NULL;
472 02828bfd 2021-06-22 stsp got_packidx_get_object_offset(struct got_packidx *packidx, int idx)
474 78fb0967 2020-09-09 naddy uint32_t offset = be32toh(packidx->hdr.offsets[idx]);
475 a1fd68d8 2018-01-12 stsp if (offset & GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX) {
476 a1fd68d8 2018-01-12 stsp uint64_t loffset;
477 a1fd68d8 2018-01-12 stsp idx = offset & GOT_PACKIDX_OFFSET_VAL_MASK;
478 5e6be232 2019-11-08 stsp if (idx < 0 || idx >= packidx->nlargeobj ||
479 6fd11751 2018-06-04 stsp packidx->hdr.large_offsets == NULL)
481 78fb0967 2020-09-09 naddy loffset = be64toh(packidx->hdr.large_offsets[idx]);
482 a1fd68d8 2018-01-12 stsp return (loffset > INT64_MAX ? -1 : (off_t)loffset);
484 a1fd68d8 2018-01-12 stsp return (off_t)(offset & GOT_PACKIDX_OFFSET_VAL_MASK);
488 c0df5966 2021-12-31 stsp got_packidx_get_object_idx(struct got_packidx *packidx,
489 c0df5966 2021-12-31 stsp struct got_object_id *id)
491 00927983 2020-04-19 stsp u_int8_t id0 = id->sha1[0];
492 78fb0967 2020-09-09 naddy uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
493 40aeb19c 2018-06-22 stsp int left = 0, right = totobj - 1;
495 a1fd68d8 2018-01-12 stsp if (id0 > 0)
496 78fb0967 2020-09-09 naddy left = be32toh(packidx->hdr.fanout_table[id0 - 1]);
498 40aeb19c 2018-06-22 stsp while (left <= right) {
499 57b35b75 2018-06-22 stsp struct got_packidx_object_id *oid;
500 40aeb19c 2018-06-22 stsp int i, cmp;
502 40aeb19c 2018-06-22 stsp i = ((left + right) / 2);
503 40aeb19c 2018-06-22 stsp oid = &packidx->hdr.sorted_ids[i];
504 00927983 2020-04-19 stsp cmp = memcmp(id->sha1, oid->sha1, SHA1_DIGEST_LENGTH);
505 16dcbf91 2018-04-01 stsp if (cmp == 0)
507 40aeb19c 2018-06-22 stsp else if (cmp > 0)
508 40aeb19c 2018-06-22 stsp left = i + 1;
509 40aeb19c 2018-06-22 stsp else if (cmp < 0)
510 40aeb19c 2018-06-22 stsp right = i - 1;
516 876c234b 2018-09-10 stsp const struct got_error *
517 dd88155e 2019-06-29 stsp got_packidx_match_id_str_prefix(struct got_object_id_queue *matched_ids,
518 4277420a 2019-06-29 stsp struct got_packidx *packidx, const char *id_str_prefix)
520 dd88155e 2019-06-29 stsp const struct got_error *err = NULL;
521 4277420a 2019-06-29 stsp u_int8_t id0;
522 78fb0967 2020-09-09 naddy uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
523 4277420a 2019-06-29 stsp char hex[3];
524 4277420a 2019-06-29 stsp size_t prefix_len = strlen(id_str_prefix);
525 e09a504c 2019-06-28 stsp struct got_packidx_object_id *oid;
526 5a17689a 2020-09-24 stsp uint32_t i;
528 dbdddfee 2021-06-23 naddy STAILQ_INIT(matched_ids);
530 4277420a 2019-06-29 stsp if (prefix_len < 2)
531 6dd1ece6 2019-11-10 stsp return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
533 4277420a 2019-06-29 stsp hex[0] = id_str_prefix[0];
534 4277420a 2019-06-29 stsp hex[1] = id_str_prefix[1];
535 4277420a 2019-06-29 stsp hex[2] = '\0';
536 4277420a 2019-06-29 stsp if (!got_parse_xdigit(&id0, hex))
537 6dd1ece6 2019-11-10 stsp return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
539 78fb0967 2020-09-09 naddy i = be32toh(packidx->hdr.fanout_table[id0 - 1]);
540 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[i];
541 4277420a 2019-06-29 stsp while (i < totobj && oid->sha1[0] == id0) {
542 4277420a 2019-06-29 stsp char id_str[SHA1_DIGEST_STRING_LENGTH];
543 dd88155e 2019-06-29 stsp struct got_object_qid *qid;
546 4277420a 2019-06-29 stsp if (!got_sha1_digest_to_str(oid->sha1, id_str, sizeof(id_str)))
547 4277420a 2019-06-29 stsp return got_error(GOT_ERR_NO_SPACE);
549 4277420a 2019-06-29 stsp cmp = strncmp(id_str, id_str_prefix, prefix_len);
550 4277420a 2019-06-29 stsp if (cmp < 0) {
551 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[++i];
553 4277420a 2019-06-29 stsp } else if (cmp > 0)
556 dd88155e 2019-06-29 stsp err = got_object_qid_alloc_partial(&qid);
559 dd88155e 2019-06-29 stsp memcpy(qid->id->sha1, oid->sha1, SHA1_DIGEST_LENGTH);
560 dbdddfee 2021-06-23 naddy STAILQ_INSERT_TAIL(matched_ids, qid, entry);
562 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[++i];
566 0adc7bcc 2019-06-29 stsp got_object_id_queue_free(matched_ids);
567 dd88155e 2019-06-29 stsp return err;
570 b4f37570 2021-06-19 stsp static const struct got_error *
571 b4f37570 2021-06-19 stsp pack_stop_privsep_child(struct got_pack *pack)
573 96732e0b 2018-11-11 stsp const struct got_error *err = NULL;
575 876c234b 2018-09-10 stsp if (pack->privsep_child == NULL)
576 876c234b 2018-09-10 stsp return NULL;
578 876c234b 2018-09-10 stsp err = got_privsep_send_stop(pack->privsep_child->imsg_fd);
580 96732e0b 2018-11-11 stsp return err;
581 96732e0b 2018-11-11 stsp err = got_privsep_wait_for_child(pack->privsep_child->pid);
582 08578a35 2021-01-22 stsp if (close(pack->privsep_child->imsg_fd) == -1 && err == NULL)
583 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
584 cc2a8ef4 2021-06-19 tracey imsg_clear(pack->privsep_child->ibuf);
585 cc2a8ef4 2021-06-19 tracey free(pack->privsep_child->ibuf);
586 876c234b 2018-09-10 stsp free(pack->privsep_child);
587 876c234b 2018-09-10 stsp pack->privsep_child = NULL;
588 876c234b 2018-09-10 stsp return err;
591 d7464085 2018-07-09 stsp const struct got_error *
592 7e656b93 2018-03-17 stsp got_pack_close(struct got_pack *pack)
594 d7464085 2018-07-09 stsp const struct got_error *err = NULL;
596 b4f37570 2021-06-19 stsp err = pack_stop_privsep_child(pack);
597 876c234b 2018-09-10 stsp if (pack->map && munmap(pack->map, pack->filesize) == -1 && !err)
598 638f9024 2019-05-13 stsp err = got_error_from_errno("munmap");
599 08578a35 2021-01-22 stsp if (pack->fd != -1 && close(pack->fd) == -1 && err == NULL)
600 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
601 8b2180d4 2018-04-26 stsp pack->fd = -1;
602 4589e373 2018-03-17 stsp free(pack->path_packfile);
603 4589e373 2018-03-17 stsp pack->path_packfile = NULL;
604 4589e373 2018-03-17 stsp pack->filesize = 0;
605 ab2f42e7 2019-11-10 stsp if (pack->delta_cache) {
606 ab2f42e7 2019-11-10 stsp got_delta_cache_free(pack->delta_cache);
607 ab2f42e7 2019-11-10 stsp pack->delta_cache = NULL;
610 c7fe698a 2018-01-23 stsp return err;
613 668a20f6 2020-03-18 stsp const struct got_error *
614 668a20f6 2020-03-18 stsp got_pack_parse_object_type_and_size(uint8_t *type, uint64_t *size, size_t *len,
615 d7464085 2018-07-09 stsp struct got_pack *pack, off_t offset)
617 a487c1d0 2018-01-14 stsp uint8_t t = 0;
618 a487c1d0 2018-01-14 stsp uint64_t s = 0;
619 a487c1d0 2018-01-14 stsp uint8_t sizeN;
620 d7464085 2018-07-09 stsp size_t mapoff = 0;
625 d7464085 2018-07-09 stsp if (offset >= pack->filesize)
626 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
628 d7464085 2018-07-09 stsp if (pack->map) {
629 d7464085 2018-07-09 stsp mapoff = (size_t)offset;
631 d7464085 2018-07-09 stsp if (lseek(pack->fd, offset, SEEK_SET) == -1)
632 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
636 a1fd68d8 2018-01-12 stsp /* We do not support size values which don't fit in 64 bit. */
638 a487c1d0 2018-01-14 stsp return got_error(GOT_ERR_NO_SPACE);
640 d7464085 2018-07-09 stsp if (pack->map) {
641 d7464085 2018-07-09 stsp sizeN = *(pack->map + mapoff);
642 d7464085 2018-07-09 stsp mapoff += sizeof(sizeN);
644 d7464085 2018-07-09 stsp ssize_t n = read(pack->fd, &sizeN, sizeof(sizeN));
646 638f9024 2019-05-13 stsp return got_error_from_errno("read");
647 d7464085 2018-07-09 stsp if (n != sizeof(sizeN))
648 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
650 d7464085 2018-07-09 stsp *len += sizeof(sizeN);
652 a1fd68d8 2018-01-12 stsp if (i == 0) {
653 a487c1d0 2018-01-14 stsp t = (sizeN & GOT_PACK_OBJ_SIZE0_TYPE_MASK) >>
654 a1fd68d8 2018-01-12 stsp GOT_PACK_OBJ_SIZE0_TYPE_MASK_SHIFT;
655 a487c1d0 2018-01-14 stsp s = (sizeN & GOT_PACK_OBJ_SIZE0_VAL_MASK);
657 a1fd68d8 2018-01-12 stsp size_t shift = 4 + 7 * (i - 1);
658 a487c1d0 2018-01-14 stsp s |= ((sizeN & GOT_PACK_OBJ_SIZE_VAL_MASK) << shift);
661 a1fd68d8 2018-01-12 stsp } while (sizeN & GOT_PACK_OBJ_SIZE_MORE);
665 a487c1d0 2018-01-14 stsp return NULL;
668 a1fd68d8 2018-01-12 stsp static const struct got_error *
669 5f25cc85 2019-11-26 stsp open_plain_object(struct got_object **obj, struct got_object_id *id,
670 5f25cc85 2019-11-26 stsp uint8_t type, off_t offset, size_t size, int idx)
672 6ccb713b 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
673 6ccb713b 2018-01-19 stsp if (*obj == NULL)
674 638f9024 2019-05-13 stsp return got_error_from_errno("calloc");
676 6ccb713b 2018-01-19 stsp (*obj)->type = type;
677 6ccb713b 2018-01-19 stsp (*obj)->flags = GOT_OBJ_FLAG_PACKED;
678 c59b3346 2018-09-11 stsp (*obj)->pack_idx = idx;
679 6ccb713b 2018-01-19 stsp (*obj)->hdrlen = 0;
680 6ccb713b 2018-01-19 stsp (*obj)->size = size;
681 106807b4 2018-09-15 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
682 6ccb713b 2018-01-19 stsp (*obj)->pack_offset = offset;
684 b107e67f 2018-01-19 stsp return NULL;
687 b107e67f 2018-01-19 stsp static const struct got_error *
688 d7464085 2018-07-09 stsp parse_negative_offset(int64_t *offset, size_t *len, struct got_pack *pack,
689 d7464085 2018-07-09 stsp off_t delta_offset)
691 b107e67f 2018-01-19 stsp int64_t o = 0;
692 b107e67f 2018-01-19 stsp uint8_t offN;
695 a0de39f3 2019-08-09 stsp *offset = 0;
699 b107e67f 2018-01-19 stsp /* We do not support offset values which don't fit in 64 bit. */
701 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_NO_SPACE);
703 d7464085 2018-07-09 stsp if (pack->map) {
704 d7464085 2018-07-09 stsp size_t mapoff;
705 d7464085 2018-07-09 stsp if (delta_offset >= pack->filesize)
706 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
707 d7464085 2018-07-09 stsp mapoff = (size_t)delta_offset + *len;
708 d7464085 2018-07-09 stsp offN = *(pack->map + mapoff);
711 d7464085 2018-07-09 stsp n = read(pack->fd, &offN, sizeof(offN));
713 638f9024 2019-05-13 stsp return got_error_from_errno("read");
714 d7464085 2018-07-09 stsp if (n != sizeof(offN))
715 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
717 d7464085 2018-07-09 stsp *len += sizeof(offN);
719 b107e67f 2018-01-19 stsp if (i == 0)
720 b107e67f 2018-01-19 stsp o = (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
724 cecc778e 2018-01-23 stsp o += (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
727 b107e67f 2018-01-19 stsp } while (offN & GOT_PACK_OBJ_DELTA_OFF_MORE);
729 b107e67f 2018-01-19 stsp *offset = o;
730 6ccb713b 2018-01-19 stsp return NULL;
733 668a20f6 2020-03-18 stsp const struct got_error *
734 c0df5966 2021-12-31 stsp got_pack_parse_offset_delta(off_t *base_offset, size_t *len,
735 c0df5966 2021-12-31 stsp struct got_pack *pack, off_t offset, int tslen)
737 96f5e8b3 2018-01-23 stsp const struct got_error *err;
738 b107e67f 2018-01-19 stsp int64_t negoffset;
739 b107e67f 2018-01-19 stsp size_t negofflen;
743 d7464085 2018-07-09 stsp err = parse_negative_offset(&negoffset, &negofflen, pack,
744 d7464085 2018-07-09 stsp offset + tslen);
746 b107e67f 2018-01-19 stsp return err;
748 b107e67f 2018-01-19 stsp /* Compute the base object's offset (must be in the same pack file). */
749 96f5e8b3 2018-01-23 stsp *base_offset = (offset - negoffset);
750 96f5e8b3 2018-01-23 stsp if (*base_offset <= 0)
751 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_BAD_PACKFILE);
753 d7464085 2018-07-09 stsp *len = negofflen;
754 96f5e8b3 2018-01-23 stsp return NULL;
757 0e22967e 2018-02-11 stsp static const struct got_error *
758 42c69117 2019-11-10 stsp read_delta_data(uint8_t **delta_buf, size_t *delta_len,
759 42c69117 2019-11-10 stsp size_t delta_data_offset, struct got_pack *pack)
761 42c69117 2019-11-10 stsp const struct got_error *err = NULL;
763 42c69117 2019-11-10 stsp if (pack->map) {
764 42c69117 2019-11-10 stsp if (delta_data_offset >= pack->filesize)
765 42c69117 2019-11-10 stsp return got_error(GOT_ERR_PACK_OFFSET);
766 2e5a6fad 2020-03-18 stsp err = got_inflate_to_mem_mmap(delta_buf, delta_len,
767 2e5a6fad 2020-03-18 stsp NULL, NULL, pack->map, delta_data_offset,
768 2e5a6fad 2020-03-18 stsp pack->filesize - delta_data_offset);
770 42c69117 2019-11-10 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET) == -1)
771 42c69117 2019-11-10 stsp return got_error_from_errno("lseek");
772 3ab5e33c 2020-03-18 stsp err = got_inflate_to_mem_fd(delta_buf, delta_len, NULL,
773 55fdd257 2020-03-18 stsp NULL, 0, pack->fd);
775 42c69117 2019-11-10 stsp return err;
778 96f5e8b3 2018-01-23 stsp static const struct got_error *
779 c336f889 2018-07-23 stsp add_delta(struct got_delta_chain *deltas, off_t delta_offset, size_t tslen,
780 42c69117 2019-11-10 stsp int delta_type, size_t delta_size, size_t delta_data_offset)
782 bdd2fbb3 2018-02-11 stsp struct got_delta *delta;
784 c336f889 2018-07-23 stsp delta = got_delta_open(delta_offset, tslen, delta_type, delta_size,
785 42c69117 2019-11-10 stsp delta_data_offset);
786 bdd2fbb3 2018-02-11 stsp if (delta == NULL)
787 638f9024 2019-05-13 stsp return got_error_from_errno("got_delta_open");
788 bdd2fbb3 2018-02-11 stsp /* delta is freed in got_object_close() */
789 bdd2fbb3 2018-02-11 stsp deltas->nentries++;
790 dbdddfee 2021-06-23 naddy STAILQ_INSERT_HEAD(&deltas->entries, delta, entry);
791 bdd2fbb3 2018-02-11 stsp return NULL;
794 bdd2fbb3 2018-02-11 stsp static const struct got_error *
795 6b9c9673 2018-01-23 stsp resolve_offset_delta(struct got_delta_chain *deltas,
796 c8ecd499 2018-09-09 stsp struct got_packidx *packidx, struct got_pack *pack, off_t delta_offset,
797 c8ecd499 2018-09-09 stsp size_t tslen, int delta_type, size_t delta_size, unsigned int recursion)
800 a3500804 2018-01-23 stsp const struct got_error *err;
801 c3703302 2018-01-23 stsp off_t base_offset;
802 c3703302 2018-01-23 stsp uint8_t base_type;
803 c3703302 2018-01-23 stsp uint64_t base_size;
804 c3703302 2018-01-23 stsp size_t base_tslen;
805 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
806 42c69117 2019-11-10 stsp size_t consumed;
808 668a20f6 2020-03-18 stsp err = got_pack_parse_offset_delta(&base_offset, &consumed, pack,
809 d7464085 2018-07-09 stsp delta_offset, tslen);
811 a3500804 2018-01-23 stsp return err;
813 d7464085 2018-07-09 stsp delta_data_offset = delta_offset + tslen + consumed;
814 d7464085 2018-07-09 stsp if (delta_data_offset >= pack->filesize)
815 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
817 d7464085 2018-07-09 stsp if (pack->map == NULL) {
818 d7464085 2018-07-09 stsp delta_data_offset = lseek(pack->fd, 0, SEEK_CUR);
819 d7464085 2018-07-09 stsp if (delta_data_offset == -1)
820 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
823 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type, delta_size,
824 42c69117 2019-11-10 stsp delta_data_offset);
826 1a35c1bc 2019-05-22 stsp return err;
828 c3703302 2018-01-23 stsp /* An offset delta must be in the same packfile. */
829 1a35c1bc 2019-05-22 stsp if (base_offset >= pack->filesize)
830 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_PACK_OFFSET);
832 668a20f6 2020-03-18 stsp err = got_pack_parse_object_type_and_size(&base_type, &base_size,
833 668a20f6 2020-03-18 stsp &base_tslen, pack, base_offset);
835 1a35c1bc 2019-05-22 stsp return err;
837 668a20f6 2020-03-18 stsp return got_pack_resolve_delta_chain(deltas, packidx, pack, base_offset,
838 b0e2201a 2018-06-22 stsp base_tslen, base_type, base_size, recursion - 1);
841 c4330eff 2021-06-22 stsp const struct got_error *
842 c4330eff 2021-06-22 stsp got_pack_parse_ref_delta(struct got_object_id *id,
843 c4330eff 2021-06-22 stsp struct got_pack *pack, off_t delta_offset, int tslen)
845 c4330eff 2021-06-22 stsp if (pack->map) {
846 c4330eff 2021-06-22 stsp size_t mapoff = delta_offset + tslen;
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;
1123 6691714a 2018-01-23 stsp /* Deltas are ordered in ascending order. */
1124 dbdddfee 2021-06-23 naddy STAILQ_FOREACH(delta, &deltas->entries, entry) {
1125 ab2f42e7 2019-11-10 stsp int cached = 1;
1126 a6b158cc 2018-02-11 stsp if (n == 0) {
1127 34fca9c3 2018-11-11 stsp size_t mapoff;
1128 0c048b15 2018-04-27 stsp off_t delta_data_offset;
1130 a6b158cc 2018-02-11 stsp /* Plain object types are the delta base. */
1131 a6b158cc 2018-02-11 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1132 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1133 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1134 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1135 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1136 72eb3431 2018-04-01 stsp goto done;
1139 0c048b15 2018-04-27 stsp delta_data_offset = delta->offset + delta->tslen;
1140 0c048b15 2018-04-27 stsp if (delta_data_offset >= pack->filesize) {
1141 0c048b15 2018-04-27 stsp err = got_error(GOT_ERR_PACK_OFFSET);
1142 0c048b15 2018-04-27 stsp goto done;
1144 d7464085 2018-07-09 stsp if (pack->map == NULL) {
1145 d7464085 2018-07-09 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET)
1147 638f9024 2019-05-13 stsp err = got_error_from_errno("lseek");
1148 d7464085 2018-07-09 stsp goto done;
1151 d7464085 2018-07-09 stsp if (base_file) {
1152 d7464085 2018-07-09 stsp if (pack->map) {
1153 d7464085 2018-07-09 stsp mapoff = (size_t)delta_data_offset;
1154 d7464085 2018-07-09 stsp err = got_inflate_to_file_mmap(
1155 4788f1ce 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->map,
1156 4788f1ce 2020-03-18 stsp mapoff, pack->filesize - mapoff,
1157 4788f1ce 2020-03-18 stsp base_file);
1159 34fca9c3 2018-11-11 stsp err = got_inflate_to_file_fd(
1160 4788f1ce 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->fd,
1161 4788f1ce 2020-03-18 stsp base_file);
1163 d7464085 2018-07-09 stsp if (pack->map) {
1164 d7464085 2018-07-09 stsp mapoff = (size_t)delta_data_offset;
1165 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&base_buf,
1166 2e5a6fad 2020-03-18 stsp &base_bufsz, NULL, NULL,
1167 2e5a6fad 2020-03-18 stsp pack->map, mapoff,
1168 d7464085 2018-07-09 stsp pack->filesize - mapoff);
1170 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&base_buf,
1171 55fdd257 2020-03-18 stsp &base_bufsz, NULL, NULL, max_size,
1172 55fdd257 2020-03-18 stsp pack->fd);
1175 a6b158cc 2018-02-11 stsp goto done;
1177 8628c62d 2018-03-15 stsp if (base_file)
1178 8628c62d 2018-03-15 stsp rewind(base_file);
1182 ab2f42e7 2019-11-10 stsp got_delta_cache_get(&delta_buf, &delta_len,
1183 ab2f42e7 2019-11-10 stsp pack->delta_cache, delta->data_offset);
1184 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1185 ab2f42e7 2019-11-10 stsp cached = 0;
1186 ab2f42e7 2019-11-10 stsp err = read_delta_data(&delta_buf, &delta_len,
1187 ab2f42e7 2019-11-10 stsp delta->data_offset, pack);
1189 ab2f42e7 2019-11-10 stsp goto done;
1190 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1191 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1192 ab2f42e7 2019-11-10 stsp if (err == NULL)
1193 ab2f42e7 2019-11-10 stsp cached = 1;
1194 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1195 ab2f42e7 2019-11-10 stsp free(delta_buf);
1196 ab2f42e7 2019-11-10 stsp goto done;
1199 8628c62d 2018-03-15 stsp if (base_buf) {
1200 34fca9c3 2018-11-11 stsp err = got_delta_apply_in_mem(base_buf, base_bufsz,
1201 42c69117 2019-11-10 stsp delta_buf, delta_len, accum_buf,
1202 34fca9c3 2018-11-11 stsp &accum_size, max_size);
1205 42c69117 2019-11-10 stsp err = got_delta_apply(base_file, delta_buf,
1206 42c69117 2019-11-10 stsp delta_len,
1207 8628c62d 2018-03-15 stsp /* Final delta application writes to output file. */
1208 b29656e2 2018-03-16 stsp ++n < deltas->nentries ? accum_file : outfile,
1209 b29656e2 2018-03-16 stsp &accum_size);
1211 ab2f42e7 2019-11-10 stsp if (!cached)
1212 ab2f42e7 2019-11-10 stsp free(delta_buf);
1214 6691714a 2018-01-23 stsp goto done;
1216 710bb5ca 2018-01-23 stsp if (n < deltas->nentries) {
1217 6691714a 2018-01-23 stsp /* Accumulated delta becomes the new base. */
1218 8628c62d 2018-03-15 stsp if (base_buf) {
1219 8628c62d 2018-03-15 stsp uint8_t *tmp = accum_buf;
1221 34fca9c3 2018-11-11 stsp * Base buffer switches roles with accumulation
1222 34fca9c3 2018-11-11 stsp * buffer. Ensure it can hold the largest
1223 34fca9c3 2018-11-11 stsp * result in the delta chain. The initial
1224 34fca9c3 2018-11-11 stsp * allocation might have been smaller.
1226 34fca9c3 2018-11-11 stsp if (base_bufsz < max_size) {
1227 34fca9c3 2018-11-11 stsp uint8_t *p;
1228 34fca9c3 2018-11-11 stsp p = reallocarray(base_buf, 1, max_size);
1229 34fca9c3 2018-11-11 stsp if (p == NULL) {
1230 638f9024 2019-05-13 stsp err = got_error_from_errno(
1231 230a42bd 2019-05-11 jcs "reallocarray");
1232 34fca9c3 2018-11-11 stsp goto done;
1234 34fca9c3 2018-11-11 stsp base_buf = p;
1235 34fca9c3 2018-11-11 stsp base_bufsz = max_size;
1237 8628c62d 2018-03-15 stsp accum_buf = base_buf;
1238 8628c62d 2018-03-15 stsp base_buf = tmp;
1240 8628c62d 2018-03-15 stsp FILE *tmp = accum_file;
1241 8628c62d 2018-03-15 stsp accum_file = base_file;
1242 8628c62d 2018-03-15 stsp base_file = tmp;
1243 8628c62d 2018-03-15 stsp rewind(base_file);
1244 8628c62d 2018-03-15 stsp rewind(accum_file);
1250 8628c62d 2018-03-15 stsp free(base_buf);
1251 8628c62d 2018-03-15 stsp if (accum_buf) {
1252 8628c62d 2018-03-15 stsp size_t len = fwrite(accum_buf, 1, accum_size, outfile);
1253 8628c62d 2018-03-15 stsp free(accum_buf);
1254 8628c62d 2018-03-15 stsp if (len != accum_size)
1255 673702af 2018-07-23 stsp err = got_ferror(outfile, GOT_ERR_IO);
1257 6691714a 2018-01-23 stsp rewind(outfile);
1258 b29656e2 2018-03-16 stsp if (err == NULL)
1259 b29656e2 2018-03-16 stsp *result_size = accum_size;
1260 e0ab43e7 2018-03-16 stsp return err;
1263 668a20f6 2020-03-18 stsp const struct got_error *
1264 668a20f6 2020-03-18 stsp got_pack_dump_delta_chain_to_mem(uint8_t **outbuf, size_t *outlen,
1265 48095039 2018-09-09 stsp struct got_delta_chain *deltas, struct got_pack *pack)
1267 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1268 e0ab43e7 2018-03-16 stsp struct got_delta *delta;
1269 42c69117 2019-11-10 stsp uint8_t *base_buf = NULL, *accum_buf = NULL, *delta_buf;
1270 42c69117 2019-11-10 stsp size_t base_bufsz = 0, accum_size = 0, delta_len;
1271 e0ab43e7 2018-03-16 stsp uint64_t max_size;
1272 e0ab43e7 2018-03-16 stsp int n = 0;
1274 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1275 e0ab43e7 2018-03-16 stsp *outlen = 0;
1277 dbdddfee 2021-06-23 naddy if (STAILQ_EMPTY(&deltas->entries))
1278 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
1280 d582f26c 2020-03-18 stsp err = got_pack_get_delta_chain_max_size(&max_size, deltas, pack);
1282 e0ab43e7 2018-03-16 stsp return err;
1283 e0ab43e7 2018-03-16 stsp accum_buf = malloc(max_size);
1284 e0ab43e7 2018-03-16 stsp if (accum_buf == NULL)
1285 638f9024 2019-05-13 stsp return got_error_from_errno("malloc");
1287 e0ab43e7 2018-03-16 stsp /* Deltas are ordered in ascending order. */
1288 dbdddfee 2021-06-23 naddy STAILQ_FOREACH(delta, &deltas->entries, entry) {
1289 ab2f42e7 2019-11-10 stsp int cached = 1;
1290 e0ab43e7 2018-03-16 stsp if (n == 0) {
1291 0c048b15 2018-04-27 stsp size_t delta_data_offset;
1293 e0ab43e7 2018-03-16 stsp /* Plain object types are the delta base. */
1294 e0ab43e7 2018-03-16 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1295 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1296 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1297 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1298 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1299 72eb3431 2018-04-01 stsp goto done;
1302 0c048b15 2018-04-27 stsp delta_data_offset = delta->offset + delta->tslen;
1303 0c048b15 2018-04-27 stsp if (delta_data_offset >= pack->filesize) {
1304 0c048b15 2018-04-27 stsp err = got_error(GOT_ERR_PACK_OFFSET);
1305 0c048b15 2018-04-27 stsp goto done;
1307 d7464085 2018-07-09 stsp if (pack->map) {
1308 d7464085 2018-07-09 stsp size_t mapoff = (size_t)delta_data_offset;
1309 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&base_buf,
1310 2e5a6fad 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->map,
1311 2e5a6fad 2020-03-18 stsp mapoff, pack->filesize - mapoff);
1313 d7464085 2018-07-09 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET)
1315 638f9024 2019-05-13 stsp err = got_error_from_errno("lseek");
1316 d7464085 2018-07-09 stsp goto done;
1318 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&base_buf,
1319 55fdd257 2020-03-18 stsp &base_bufsz, NULL, NULL, max_size,
1320 55fdd257 2020-03-18 stsp pack->fd);
1323 d7464085 2018-07-09 stsp goto done;
1328 ab2f42e7 2019-11-10 stsp got_delta_cache_get(&delta_buf, &delta_len,
1329 ab2f42e7 2019-11-10 stsp pack->delta_cache, delta->data_offset);
1330 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1331 ab2f42e7 2019-11-10 stsp cached = 0;
1332 ab2f42e7 2019-11-10 stsp err = read_delta_data(&delta_buf, &delta_len,
1333 ab2f42e7 2019-11-10 stsp delta->data_offset, pack);
1335 ab2f42e7 2019-11-10 stsp goto done;
1336 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1337 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1338 ab2f42e7 2019-11-10 stsp if (err == NULL)
1339 ab2f42e7 2019-11-10 stsp cached = 1;
1340 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1341 ab2f42e7 2019-11-10 stsp free(delta_buf);
1342 ab2f42e7 2019-11-10 stsp goto done;
1345 34fca9c3 2018-11-11 stsp err = got_delta_apply_in_mem(base_buf, base_bufsz,
1346 42c69117 2019-11-10 stsp delta_buf, delta_len, accum_buf,
1347 34fca9c3 2018-11-11 stsp &accum_size, max_size);
1348 ab2f42e7 2019-11-10 stsp if (!cached)
1349 ab2f42e7 2019-11-10 stsp free(delta_buf);
1352 e0ab43e7 2018-03-16 stsp goto done;
1354 e0ab43e7 2018-03-16 stsp if (n < deltas->nentries) {
1355 e0ab43e7 2018-03-16 stsp /* Accumulated delta becomes the new base. */
1356 e0ab43e7 2018-03-16 stsp uint8_t *tmp = accum_buf;
1358 34fca9c3 2018-11-11 stsp * Base buffer switches roles with accumulation buffer.
1359 34fca9c3 2018-11-11 stsp * Ensure it can hold the largest result in the delta
1360 34fca9c3 2018-11-11 stsp * chain. Initial allocation might have been smaller.
1362 34fca9c3 2018-11-11 stsp if (base_bufsz < max_size) {
1363 34fca9c3 2018-11-11 stsp uint8_t *p;
1364 34fca9c3 2018-11-11 stsp p = reallocarray(base_buf, 1, max_size);
1365 34fca9c3 2018-11-11 stsp if (p == NULL) {
1366 638f9024 2019-05-13 stsp err = got_error_from_errno(
1367 230a42bd 2019-05-11 jcs "reallocarray");
1368 34fca9c3 2018-11-11 stsp goto done;
1370 34fca9c3 2018-11-11 stsp base_buf = p;
1371 34fca9c3 2018-11-11 stsp base_bufsz = max_size;
1373 e0ab43e7 2018-03-16 stsp accum_buf = base_buf;
1374 e0ab43e7 2018-03-16 stsp base_buf = tmp;
1379 e0ab43e7 2018-03-16 stsp free(base_buf);
1380 e0ab43e7 2018-03-16 stsp if (err) {
1381 e0ab43e7 2018-03-16 stsp free(accum_buf);
1382 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1383 e0ab43e7 2018-03-16 stsp *outlen = 0;
1385 e0ab43e7 2018-03-16 stsp *outbuf = accum_buf;
1386 e0ab43e7 2018-03-16 stsp *outlen = accum_size;
1388 efd2a263 2018-01-19 stsp return err;
1391 3ee5fc21 2018-01-17 stsp const struct got_error *
1392 24140570 2018-09-09 stsp got_packfile_extract_object(struct got_pack *pack, struct got_object *obj,
1393 3840f4c9 2018-09-12 stsp FILE *outfile, FILE *base_file, FILE *accum_file)
1395 3ee5fc21 2018-01-17 stsp const struct got_error *err = NULL;
1397 3ee5fc21 2018-01-17 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1398 3ee5fc21 2018-01-17 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1400 ef2bccd9 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1401 24140570 2018-09-09 stsp if (obj->pack_offset >= pack->filesize)
1402 24140570 2018-09-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1404 d7464085 2018-07-09 stsp if (pack->map) {
1405 d7464085 2018-07-09 stsp size_t mapoff = (size_t)obj->pack_offset;
1406 4788f1ce 2020-03-18 stsp err = got_inflate_to_file_mmap(&obj->size, NULL, NULL,
1407 4788f1ce 2020-03-18 stsp pack->map, mapoff, pack->filesize - mapoff,
1410 24140570 2018-09-09 stsp if (lseek(pack->fd, obj->pack_offset, SEEK_SET) == -1)
1411 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
1412 4788f1ce 2020-03-18 stsp err = got_inflate_to_file_fd(&obj->size, NULL, NULL,
1413 4788f1ce 2020-03-18 stsp pack->fd, outfile);
1416 4788f1ce 2020-03-18 stsp err = got_pack_dump_delta_chain_to_file(&obj->size,
1417 4788f1ce 2020-03-18 stsp &obj->deltas, pack, outfile, base_file, accum_file);
1419 a1fd68d8 2018-01-12 stsp return err;
1422 e0ab43e7 2018-03-16 stsp const struct got_error *
1423 e0ab43e7 2018-03-16 stsp got_packfile_extract_object_to_mem(uint8_t **buf, size_t *len,
1424 7e212e3d 2018-09-09 stsp struct got_object *obj, struct got_pack *pack)
1426 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1428 e0ab43e7 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1429 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1431 48095039 2018-09-09 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1432 7e212e3d 2018-09-09 stsp if (obj->pack_offset >= pack->filesize)
1433 7e212e3d 2018-09-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1434 d7464085 2018-07-09 stsp if (pack->map) {
1435 d7464085 2018-07-09 stsp size_t mapoff = (size_t)obj->pack_offset;
1436 2e5a6fad 2020-03-18 stsp err = got_inflate_to_mem_mmap(buf, len, NULL, NULL,
1437 2e5a6fad 2020-03-18 stsp pack->map, mapoff, pack->filesize - mapoff);
1439 7e212e3d 2018-09-09 stsp if (lseek(pack->fd, obj->pack_offset, SEEK_SET) == -1)
1440 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
1441 1e87a3c3 2020-03-18 stsp err = got_inflate_to_mem_fd(buf, len, NULL, NULL,
1442 55fdd257 2020-03-18 stsp obj->size, pack->fd);
1445 668a20f6 2020-03-18 stsp err = got_pack_dump_delta_chain_to_mem(buf, len, &obj->deltas,
1448 e0ab43e7 2018-03-16 stsp return err;
