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>
21 68036464 2022-06-26 thomas #include <sys/resource.h>
22 68036464 2022-06-26 thomas #include <sys/socket.h>
24 7e656b93 2018-03-17 stsp #include <fcntl.h>
25 a1fd68d8 2018-01-12 stsp #include <errno.h>
26 0a0a3048 2018-01-10 stsp #include <stdio.h>
27 a1fd68d8 2018-01-12 stsp #include <stdint.h>
28 0a0a3048 2018-01-10 stsp #include <stdlib.h>
29 0a0a3048 2018-01-10 stsp #include <string.h>
30 0a0a3048 2018-01-10 stsp #include <limits.h>
31 81a12da5 2020-09-09 naddy #include <unistd.h>
32 a1fd68d8 2018-01-12 stsp #include <zlib.h>
34 0a0a3048 2018-01-10 stsp #include "got_error.h"
35 a1fd68d8 2018-01-12 stsp #include "got_object.h"
36 324d37e7 2019-05-11 stsp #include "got_path.h"
38 718b3ab0 2018-03-17 stsp #include "got_lib_sha1.h"
39 718b3ab0 2018-03-17 stsp #include "got_lib_delta.h"
40 ab2f42e7 2019-11-10 stsp #include "got_lib_delta_cache.h"
41 63581804 2018-07-09 stsp #include "got_lib_inflate.h"
42 718b3ab0 2018-03-17 stsp #include "got_lib_object.h"
43 dd88155e 2019-06-29 stsp #include "got_lib_object_parse.h"
44 876c234b 2018-09-10 stsp #include "got_lib_privsep.h"
45 15a94983 2018-12-23 stsp #include "got_lib_pack.h"
47 79b11c62 2018-03-09 stsp #ifndef nitems
48 79b11c62 2018-03-09 stsp #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
52 a1fd68d8 2018-01-12 stsp #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
55 0a0a3048 2018-01-10 stsp static const struct got_error *
56 0a0a3048 2018-01-10 stsp verify_fanout_table(uint32_t *fanout_table)
60 0a0a3048 2018-01-10 stsp for (i = 0; i < 0xff - 1; i++) {
61 a1fd68d8 2018-01-12 stsp if (be32toh(fanout_table[i]) > be32toh(fanout_table[i + 1]))
62 0a0a3048 2018-01-10 stsp return got_error(GOT_ERR_BAD_PACKIDX);
65 0a0a3048 2018-01-10 stsp return NULL;
68 1510f469 2018-09-09 stsp const struct got_error *
69 c3564dfa 2021-07-15 stsp got_packidx_init_hdr(struct got_packidx *p, int verify, off_t packfile_size)
71 0a0a3048 2018-01-10 stsp const struct got_error *err = NULL;
72 817c5a18 2018-09-09 stsp struct got_packidx_v2_hdr *h;
73 0ebaf008 2018-01-10 stsp SHA1_CTX ctx;
74 0ebaf008 2018-01-10 stsp uint8_t sha1[SHA1_DIGEST_LENGTH];
75 817c5a18 2018-09-09 stsp size_t nobj, len_fanout, len_ids, offset, remain;
79 0ebaf008 2018-01-10 stsp SHA1Init(&ctx);
81 57b35b75 2018-06-22 stsp h = &p->hdr;
83 57b35b75 2018-06-22 stsp remain = p->len;
85 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->magic)) {
86 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
90 fc79a48d 2018-07-09 stsp h->magic = (uint32_t *)(p->map + offset);
92 fc79a48d 2018-07-09 stsp h->magic = malloc(sizeof(*h->magic));
93 fc79a48d 2018-07-09 stsp if (h->magic == NULL) {
94 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
97 fc79a48d 2018-07-09 stsp n = read(p->fd, h->magic, sizeof(*h->magic));
98 b1317e77 2019-09-22 stsp if (n < 0) {
99 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
101 b1317e77 2019-09-22 stsp } else if (n != sizeof(*h->magic)) {
102 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
106 ac62b712 2021-03-30 stsp if (*h->magic != htobe32(GOT_PACKIDX_V2_MAGIC)) {
107 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
110 57b35b75 2018-06-22 stsp offset += sizeof(*h->magic);
111 57b35b75 2018-06-22 stsp remain -= sizeof(*h->magic);
113 0cb74cf4 2018-07-08 stsp if (verify)
114 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->magic, sizeof(*h->magic));
116 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->version)) {
117 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
120 fc79a48d 2018-07-09 stsp if (p->map)
121 fc79a48d 2018-07-09 stsp h->version = (uint32_t *)(p->map + offset);
123 fc79a48d 2018-07-09 stsp h->version = malloc(sizeof(*h->version));
124 fc79a48d 2018-07-09 stsp if (h->version == NULL) {
125 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
128 fc79a48d 2018-07-09 stsp n = read(p->fd, h->version, sizeof(*h->version));
129 c6368c2e 2019-10-11 stsp if (n < 0) {
130 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
132 c6368c2e 2019-10-11 stsp } else if (n != sizeof(*h->version)) {
133 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
137 ac62b712 2021-03-30 stsp if (*h->version != htobe32(GOT_PACKIDX_VERSION)) {
138 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
141 57b35b75 2018-06-22 stsp offset += sizeof(*h->version);
142 57b35b75 2018-06-22 stsp remain -= sizeof(*h->version);
144 0cb74cf4 2018-07-08 stsp if (verify)
145 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->version, sizeof(*h->version));
147 57b35b75 2018-06-22 stsp len_fanout =
148 57b35b75 2018-06-22 stsp sizeof(*h->fanout_table) * GOT_PACKIDX_V2_FANOUT_TABLE_ITEMS;
149 57b35b75 2018-06-22 stsp if (remain < len_fanout) {
150 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
153 fc79a48d 2018-07-09 stsp if (p->map)
154 fc79a48d 2018-07-09 stsp h->fanout_table = (uint32_t *)(p->map + offset);
156 fc79a48d 2018-07-09 stsp h->fanout_table = malloc(len_fanout);
157 fc79a48d 2018-07-09 stsp if (h->fanout_table == NULL) {
158 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
161 fc79a48d 2018-07-09 stsp n = read(p->fd, h->fanout_table, len_fanout);
162 c6368c2e 2019-10-11 stsp if (n < 0) {
163 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
165 c6368c2e 2019-10-11 stsp } else if (n != len_fanout) {
166 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
170 c8262310 2018-06-04 stsp err = verify_fanout_table(h->fanout_table);
173 0cb74cf4 2018-07-08 stsp if (verify)
174 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->fanout_table, len_fanout);
175 57b35b75 2018-06-22 stsp offset += len_fanout;
176 57b35b75 2018-06-22 stsp remain -= len_fanout;
178 78fb0967 2020-09-09 naddy nobj = be32toh(h->fanout_table[0xff]);
179 57b35b75 2018-06-22 stsp len_ids = nobj * sizeof(*h->sorted_ids);
180 57b35b75 2018-06-22 stsp if (len_ids <= nobj || len_ids > remain) {
181 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
184 fc79a48d 2018-07-09 stsp if (p->map)
185 fc79a48d 2018-07-09 stsp h->sorted_ids =
186 fc79a48d 2018-07-09 stsp (struct got_packidx_object_id *)((uint8_t*)(p->map + offset));
188 fc79a48d 2018-07-09 stsp h->sorted_ids = malloc(len_ids);
189 fc79a48d 2018-07-09 stsp if (h->sorted_ids == NULL) {
190 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
193 fc79a48d 2018-07-09 stsp n = read(p->fd, h->sorted_ids, len_ids);
195 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
196 faaa1c0f 2018-09-15 stsp else if (n != len_ids) {
197 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
201 0cb74cf4 2018-07-08 stsp if (verify)
202 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->sorted_ids, len_ids);
203 57b35b75 2018-06-22 stsp offset += len_ids;
204 57b35b75 2018-06-22 stsp remain -= len_ids;
206 57b35b75 2018-06-22 stsp if (remain < nobj * sizeof(*h->crc32)) {
207 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
210 fc79a48d 2018-07-09 stsp if (p->map)
211 fc79a48d 2018-07-09 stsp h->crc32 = (uint32_t *)((uint8_t*)(p->map + offset));
213 fc79a48d 2018-07-09 stsp h->crc32 = malloc(nobj * sizeof(*h->crc32));
214 fc79a48d 2018-07-09 stsp if (h->crc32 == NULL) {
215 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
218 fc79a48d 2018-07-09 stsp n = read(p->fd, h->crc32, nobj * sizeof(*h->crc32));
220 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
221 faaa1c0f 2018-09-15 stsp else if (n != nobj * sizeof(*h->crc32)) {
222 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
226 0cb74cf4 2018-07-08 stsp if (verify)
227 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->crc32, nobj * sizeof(*h->crc32));
228 57b35b75 2018-06-22 stsp remain -= nobj * sizeof(*h->crc32);
229 57b35b75 2018-06-22 stsp offset += nobj * sizeof(*h->crc32);
231 57b35b75 2018-06-22 stsp if (remain < nobj * sizeof(*h->offsets)) {
232 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
235 fc79a48d 2018-07-09 stsp if (p->map)
236 fc79a48d 2018-07-09 stsp h->offsets = (uint32_t *)((uint8_t*)(p->map + offset));
238 fc79a48d 2018-07-09 stsp h->offsets = malloc(nobj * sizeof(*h->offsets));
239 fc79a48d 2018-07-09 stsp if (h->offsets == NULL) {
240 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
243 fc79a48d 2018-07-09 stsp n = read(p->fd, h->offsets, nobj * sizeof(*h->offsets));
245 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
246 faaa1c0f 2018-09-15 stsp else if (n != nobj * sizeof(*h->offsets)) {
247 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
251 0cb74cf4 2018-07-08 stsp if (verify)
252 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->offsets,
253 0cb74cf4 2018-07-08 stsp nobj * sizeof(*h->offsets));
254 57b35b75 2018-06-22 stsp remain -= nobj * sizeof(*h->offsets);
255 57b35b75 2018-06-22 stsp offset += nobj * sizeof(*h->offsets);
257 0a0a3048 2018-01-10 stsp /* Large file offsets are contained only in files > 2GB. */
258 c3564dfa 2021-07-15 stsp if (verify || packfile_size > 0x7fffffff) {
259 c3564dfa 2021-07-15 stsp for (i = 0; i < nobj; i++) {
260 c3564dfa 2021-07-15 stsp uint32_t o = h->offsets[i];
261 c3564dfa 2021-07-15 stsp if (o & htobe32(GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX))
262 c3564dfa 2021-07-15 stsp p->nlargeobj++;
265 5e6be232 2019-11-08 stsp if (p->nlargeobj == 0)
266 0a0a3048 2018-01-10 stsp goto checksum;
267 c3564dfa 2021-07-15 stsp else if (packfile_size <= 0x7fffffff) {
268 c3564dfa 2021-07-15 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
272 5e6be232 2019-11-08 stsp if (remain < p->nlargeobj * sizeof(*h->large_offsets)) {
273 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
276 fc79a48d 2018-07-09 stsp if (p->map)
277 fc79a48d 2018-07-09 stsp h->large_offsets = (uint64_t *)((uint8_t*)(p->map + offset));
279 5e6be232 2019-11-08 stsp h->large_offsets = malloc(p->nlargeobj *
280 5e6be232 2019-11-08 stsp sizeof(*h->large_offsets));
281 de30857e 2019-08-23 stsp if (h->large_offsets == NULL) {
282 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
285 fc79a48d 2018-07-09 stsp n = read(p->fd, h->large_offsets,
286 5e6be232 2019-11-08 stsp p->nlargeobj * sizeof(*h->large_offsets));
288 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
289 5e6be232 2019-11-08 stsp else if (n != p->nlargeobj * sizeof(*h->large_offsets)) {
290 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
294 0cb74cf4 2018-07-08 stsp if (verify)
295 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t*)h->large_offsets,
296 5e6be232 2019-11-08 stsp p->nlargeobj * sizeof(*h->large_offsets));
297 5e6be232 2019-11-08 stsp remain -= p->nlargeobj * sizeof(*h->large_offsets);
298 5e6be232 2019-11-08 stsp offset += p->nlargeobj * sizeof(*h->large_offsets);
301 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->trailer)) {
302 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
305 fc79a48d 2018-07-09 stsp if (p->map)
306 fc79a48d 2018-07-09 stsp h->trailer =
307 fc79a48d 2018-07-09 stsp (struct got_packidx_trailer *)((uint8_t*)(p->map + offset));
309 fc79a48d 2018-07-09 stsp h->trailer = malloc(sizeof(*h->trailer));
310 fc79a48d 2018-07-09 stsp if (h->trailer == NULL) {
311 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
314 fc79a48d 2018-07-09 stsp n = read(p->fd, h->trailer, sizeof(*h->trailer));
316 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
317 faaa1c0f 2018-09-15 stsp else if (n != sizeof(*h->trailer)) {
318 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
322 0cb74cf4 2018-07-08 stsp if (verify) {
323 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, h->trailer->packfile_sha1, SHA1_DIGEST_LENGTH);
324 0cb74cf4 2018-07-08 stsp SHA1Final(sha1, &ctx);
325 0cb74cf4 2018-07-08 stsp if (memcmp(h->trailer->packidx_sha1, sha1,
326 0cb74cf4 2018-07-08 stsp SHA1_DIGEST_LENGTH) != 0)
327 0cb74cf4 2018-07-08 stsp err = got_error(GOT_ERR_PACKIDX_CSUM);
330 817c5a18 2018-09-09 stsp return err;
333 817c5a18 2018-09-09 stsp const struct got_error *
334 6d5a9006 2020-12-16 yzhong got_packidx_open(struct got_packidx **packidx,
335 6d5a9006 2020-12-16 yzhong int dir_fd, const char *relpath, int verify)
337 817c5a18 2018-09-09 stsp const struct got_error *err = NULL;
338 1124fe40 2021-07-07 stsp struct got_packidx *p = NULL;
339 1124fe40 2021-07-07 stsp char *pack_relpath;
340 c3564dfa 2021-07-15 stsp struct stat idx_sb, pack_sb;
342 817c5a18 2018-09-09 stsp *packidx = NULL;
344 1124fe40 2021-07-07 stsp err = got_packidx_get_packfile_path(&pack_relpath, relpath);
346 1124fe40 2021-07-07 stsp return err;
349 1124fe40 2021-07-07 stsp * Ensure that a corresponding pack file exists.
350 1124fe40 2021-07-07 stsp * Some Git repositories have this problem. Git seems to ignore
351 1124fe40 2021-07-07 stsp * the existence of lonely pack index files but we do not.
353 c3564dfa 2021-07-15 stsp if (fstatat(dir_fd, pack_relpath, &pack_sb, 0) == -1) {
354 1124fe40 2021-07-07 stsp if (errno == ENOENT) {
355 1124fe40 2021-07-07 stsp err = got_error_fmt(GOT_ERR_LONELY_PACKIDX,
356 1124fe40 2021-07-07 stsp "%s", relpath);
358 1124fe40 2021-07-07 stsp err = got_error_from_errno2("fstatat", pack_relpath);
362 817c5a18 2018-09-09 stsp p = calloc(1, sizeof(*p));
363 1124fe40 2021-07-07 stsp if (p == NULL) {
364 1124fe40 2021-07-07 stsp err = got_error_from_errno("calloc");
368 fc63f50d 2021-12-31 thomas p->fd = openat(dir_fd, relpath, O_RDONLY | O_NOFOLLOW | O_CLOEXEC);
369 6772cf22 2019-08-28 hiltjo if (p->fd == -1) {
370 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);
378 c3564dfa 2021-07-15 stsp p->len = idx_sb.st_size;
379 817c5a18 2018-09-09 stsp if (p->len < sizeof(p->hdr)) {
380 817c5a18 2018-09-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
384 6d5a9006 2020-12-16 yzhong p->path_packidx = strdup(relpath);
385 817c5a18 2018-09-09 stsp if (p->path_packidx == NULL) {
386 638f9024 2019-05-13 stsp err = got_error_from_errno("strdup");
390 817c5a18 2018-09-09 stsp #ifndef GOT_PACK_NO_MMAP
391 817c5a18 2018-09-09 stsp p->map = mmap(NULL, p->len, PROT_READ, MAP_PRIVATE, p->fd, 0);
392 3a11398b 2019-02-21 stsp if (p->map == MAP_FAILED) {
393 3a11398b 2019-02-21 stsp if (errno != ENOMEM) {
394 638f9024 2019-05-13 stsp err = got_error_from_errno("mmap");
397 817c5a18 2018-09-09 stsp p->map = NULL; /* fall back to read(2) */
401 c3564dfa 2021-07-15 stsp err = got_packidx_init_hdr(p, verify, pack_sb.st_size);
405 1124fe40 2021-07-07 stsp got_packidx_close(p);
407 0a0a3048 2018-01-10 stsp *packidx = p;
408 1124fe40 2021-07-07 stsp free(pack_relpath);
409 0a0a3048 2018-01-10 stsp return err;
412 57b35b75 2018-06-22 stsp const struct got_error *
413 6fd11751 2018-06-04 stsp got_packidx_close(struct got_packidx *packidx)
415 57b35b75 2018-06-22 stsp const struct got_error *err = NULL;
417 6fd11751 2018-06-04 stsp free(packidx->path_packidx);
418 fc79a48d 2018-07-09 stsp if (packidx->map) {
419 57b35b75 2018-06-22 stsp if (munmap(packidx->map, packidx->len) == -1)
420 638f9024 2019-05-13 stsp err = got_error_from_errno("munmap");
422 fc79a48d 2018-07-09 stsp free(packidx->hdr.magic);
423 fc79a48d 2018-07-09 stsp free(packidx->hdr.version);
424 fc79a48d 2018-07-09 stsp free(packidx->hdr.fanout_table);
425 fc79a48d 2018-07-09 stsp free(packidx->hdr.sorted_ids);
426 fc79a48d 2018-07-09 stsp free(packidx->hdr.crc32);
427 fc79a48d 2018-07-09 stsp free(packidx->hdr.offsets);
428 fc79a48d 2018-07-09 stsp free(packidx->hdr.large_offsets);
429 fc79a48d 2018-07-09 stsp free(packidx->hdr.trailer);
431 08578a35 2021-01-22 stsp if (close(packidx->fd) == -1 && err == NULL)
432 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
433 f9c2e8e5 2022-02-13 thomas free(packidx->sorted_offsets);
434 f9c2e8e5 2022-02-13 thomas free(packidx->sorted_large_offsets);
435 0a0a3048 2018-01-10 stsp free(packidx);
437 57b35b75 2018-06-22 stsp return err;
440 509c9973 2021-04-10 stsp const struct got_error *
441 aea75d87 2021-07-06 stsp got_packidx_get_packfile_path(char **path_packfile, const char *path_packidx)
443 509c9973 2021-04-10 stsp size_t size;
445 509c9973 2021-04-10 stsp /* Packfile path contains ".pack" instead of ".idx", so add one byte. */
446 aea75d87 2021-07-06 stsp size = strlen(path_packidx) + 2;
447 509c9973 2021-04-10 stsp if (size < GOT_PACKFILE_NAMELEN + 1)
448 aea75d87 2021-07-06 stsp return got_error_path(path_packidx, GOT_ERR_BAD_PATH);
450 509c9973 2021-04-10 stsp *path_packfile = malloc(size);
451 509c9973 2021-04-10 stsp if (*path_packfile == NULL)
452 509c9973 2021-04-10 stsp return got_error_from_errno("malloc");
454 509c9973 2021-04-10 stsp /* Copy up to and excluding ".idx". */
455 aea75d87 2021-07-06 stsp if (strlcpy(*path_packfile, path_packidx,
456 509c9973 2021-04-10 stsp size - strlen(GOT_PACKIDX_SUFFIX) - 1) >= size)
457 509c9973 2021-04-10 stsp return got_error(GOT_ERR_NO_SPACE);
459 509c9973 2021-04-10 stsp if (strlcat(*path_packfile, GOT_PACKFILE_SUFFIX, size) >= size)
460 509c9973 2021-04-10 stsp return got_error(GOT_ERR_NO_SPACE);
462 509c9973 2021-04-10 stsp return NULL;
466 02828bfd 2021-06-22 stsp got_packidx_get_object_offset(struct got_packidx *packidx, int idx)
468 78fb0967 2020-09-09 naddy uint32_t offset = be32toh(packidx->hdr.offsets[idx]);
469 a1fd68d8 2018-01-12 stsp if (offset & GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX) {
470 a1fd68d8 2018-01-12 stsp uint64_t loffset;
471 a1fd68d8 2018-01-12 stsp idx = offset & GOT_PACKIDX_OFFSET_VAL_MASK;
472 5e6be232 2019-11-08 stsp if (idx < 0 || idx >= packidx->nlargeobj ||
473 6fd11751 2018-06-04 stsp packidx->hdr.large_offsets == NULL)
475 78fb0967 2020-09-09 naddy loffset = be64toh(packidx->hdr.large_offsets[idx]);
476 a1fd68d8 2018-01-12 stsp return (loffset > INT64_MAX ? -1 : (off_t)loffset);
478 a1fd68d8 2018-01-12 stsp return (off_t)(offset & GOT_PACKIDX_OFFSET_VAL_MASK);
482 48b4f239 2021-12-31 thomas got_packidx_get_object_idx(struct got_packidx *packidx,
483 48b4f239 2021-12-31 thomas struct got_object_id *id)
485 00927983 2020-04-19 stsp u_int8_t id0 = id->sha1[0];
486 78fb0967 2020-09-09 naddy uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
487 40aeb19c 2018-06-22 stsp int left = 0, right = totobj - 1;
489 a1fd68d8 2018-01-12 stsp if (id0 > 0)
490 78fb0967 2020-09-09 naddy left = be32toh(packidx->hdr.fanout_table[id0 - 1]);
492 40aeb19c 2018-06-22 stsp while (left <= right) {
493 57b35b75 2018-06-22 stsp struct got_packidx_object_id *oid;
494 40aeb19c 2018-06-22 stsp int i, cmp;
496 40aeb19c 2018-06-22 stsp i = ((left + right) / 2);
497 40aeb19c 2018-06-22 stsp oid = &packidx->hdr.sorted_ids[i];
498 00927983 2020-04-19 stsp cmp = memcmp(id->sha1, oid->sha1, SHA1_DIGEST_LENGTH);
499 16dcbf91 2018-04-01 stsp if (cmp == 0)
501 40aeb19c 2018-06-22 stsp else if (cmp > 0)
502 40aeb19c 2018-06-22 stsp left = i + 1;
503 40aeb19c 2018-06-22 stsp else if (cmp < 0)
504 40aeb19c 2018-06-22 stsp right = i - 1;
510 f9c2e8e5 2022-02-13 thomas static int
511 f9c2e8e5 2022-02-13 thomas offset_cmp(const void *pa, const void *pb)
513 f9c2e8e5 2022-02-13 thomas const struct got_pack_offset_index *a, *b;
515 f9c2e8e5 2022-02-13 thomas a = (const struct got_pack_offset_index *)pa;
516 f9c2e8e5 2022-02-13 thomas b = (const struct got_pack_offset_index *)pb;
518 f9c2e8e5 2022-02-13 thomas if (a->offset < b->offset)
519 f9c2e8e5 2022-02-13 thomas return -1;
520 f9c2e8e5 2022-02-13 thomas else if (a->offset > b->offset)
521 f9c2e8e5 2022-02-13 thomas return 1;
523 f9c2e8e5 2022-02-13 thomas return 0;
526 f9c2e8e5 2022-02-13 thomas static int
527 f9c2e8e5 2022-02-13 thomas large_offset_cmp(const void *pa, const void *pb)
529 f9c2e8e5 2022-02-13 thomas const struct got_pack_large_offset_index *a, *b;
531 f9c2e8e5 2022-02-13 thomas a = (const struct got_pack_large_offset_index *)pa;
532 f9c2e8e5 2022-02-13 thomas b = (const struct got_pack_large_offset_index *)pb;
534 f9c2e8e5 2022-02-13 thomas if (a->offset < b->offset)
535 f9c2e8e5 2022-02-13 thomas return -1;
536 f9c2e8e5 2022-02-13 thomas else if (a->offset > b->offset)
537 f9c2e8e5 2022-02-13 thomas return 1;
539 f9c2e8e5 2022-02-13 thomas return 0;
542 f9c2e8e5 2022-02-13 thomas static const struct got_error *
543 f9c2e8e5 2022-02-13 thomas build_offset_index(struct got_packidx *p)
545 f9c2e8e5 2022-02-13 thomas uint32_t nobj = be32toh(p->hdr.fanout_table[0xff]);
546 f9c2e8e5 2022-02-13 thomas unsigned int i, j, k;
548 f9c2e8e5 2022-02-13 thomas p->sorted_offsets = calloc(nobj - p->nlargeobj,
549 f9c2e8e5 2022-02-13 thomas sizeof(p->sorted_offsets[0]));
550 f9c2e8e5 2022-02-13 thomas if (p->sorted_offsets == NULL)
551 f9c2e8e5 2022-02-13 thomas return got_error_from_errno("calloc");
553 f9c2e8e5 2022-02-13 thomas if (p->nlargeobj > 0) {
554 f9c2e8e5 2022-02-13 thomas p->sorted_large_offsets = calloc(p->nlargeobj,
555 f9c2e8e5 2022-02-13 thomas sizeof(p->sorted_large_offsets[0]));
556 f9c2e8e5 2022-02-13 thomas if (p->sorted_large_offsets == NULL)
557 f9c2e8e5 2022-02-13 thomas return got_error_from_errno("calloc");
562 f9c2e8e5 2022-02-13 thomas for (i = 0; i < nobj; i++) {
563 f9c2e8e5 2022-02-13 thomas uint32_t offset = be32toh(p->hdr.offsets[i]);
564 f9c2e8e5 2022-02-13 thomas if (offset & GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX) {
565 f9c2e8e5 2022-02-13 thomas uint64_t loffset;
566 f9c2e8e5 2022-02-13 thomas uint32_t idx;
567 f9c2e8e5 2022-02-13 thomas idx = offset & GOT_PACKIDX_OFFSET_VAL_MASK;
568 f9c2e8e5 2022-02-13 thomas if (idx >= p->nlargeobj ||
569 f9c2e8e5 2022-02-13 thomas p->nlargeobj == 0 ||
570 f9c2e8e5 2022-02-13 thomas p->hdr.large_offsets == NULL)
571 f9c2e8e5 2022-02-13 thomas return got_error(GOT_ERR_BAD_PACKIDX);
572 f9c2e8e5 2022-02-13 thomas loffset = be64toh(p->hdr.large_offsets[idx]);
573 f9c2e8e5 2022-02-13 thomas p->sorted_large_offsets[j].offset = loffset;
574 f9c2e8e5 2022-02-13 thomas p->sorted_large_offsets[j].idx = i;
577 f9c2e8e5 2022-02-13 thomas p->sorted_offsets[k].offset = offset;
578 f9c2e8e5 2022-02-13 thomas p->sorted_offsets[k].idx = i;
582 f9c2e8e5 2022-02-13 thomas if (j != p->nlargeobj || k != nobj - p->nlargeobj)
583 f9c2e8e5 2022-02-13 thomas return got_error(GOT_ERR_BAD_PACKIDX);
585 f9c2e8e5 2022-02-13 thomas qsort(p->sorted_offsets, nobj - p->nlargeobj,
586 f9c2e8e5 2022-02-13 thomas sizeof(p->sorted_offsets[0]), offset_cmp);
588 f9c2e8e5 2022-02-13 thomas if (p->sorted_large_offsets)
589 f9c2e8e5 2022-02-13 thomas qsort(p->sorted_large_offsets, p->nlargeobj,
590 f9c2e8e5 2022-02-13 thomas sizeof(p->sorted_large_offsets[0]), large_offset_cmp);
592 f9c2e8e5 2022-02-13 thomas return NULL;
595 876c234b 2018-09-10 stsp const struct got_error *
596 f9c2e8e5 2022-02-13 thomas got_packidx_get_offset_idx(int *idx, struct got_packidx *packidx, off_t offset)
598 f9c2e8e5 2022-02-13 thomas const struct got_error *err;
599 f9c2e8e5 2022-02-13 thomas uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
600 f9c2e8e5 2022-02-13 thomas int i, left, right;
602 f9c2e8e5 2022-02-13 thomas *idx = -1;
604 f9c2e8e5 2022-02-13 thomas if (packidx->sorted_offsets == NULL) {
605 f9c2e8e5 2022-02-13 thomas err = build_offset_index(packidx);
607 f9c2e8e5 2022-02-13 thomas return err;
610 f9c2e8e5 2022-02-13 thomas if (offset >= 0x7fffffff) {
611 f9c2e8e5 2022-02-13 thomas uint64_t lo;
612 f9c2e8e5 2022-02-13 thomas left = 0, right = packidx->nlargeobj - 1;
613 f9c2e8e5 2022-02-13 thomas while (left <= right) {
614 f9c2e8e5 2022-02-13 thomas i = ((left + right) / 2);
615 f9c2e8e5 2022-02-13 thomas lo = packidx->sorted_large_offsets[i].offset;
616 f9c2e8e5 2022-02-13 thomas if (lo == offset) {
617 f9c2e8e5 2022-02-13 thomas *idx = packidx->sorted_large_offsets[i].idx;
619 f9c2e8e5 2022-02-13 thomas } else if (offset > lo)
620 f9c2e8e5 2022-02-13 thomas left = i + 1;
621 f9c2e8e5 2022-02-13 thomas else if (offset < lo)
622 f9c2e8e5 2022-02-13 thomas right = i - 1;
625 f9c2e8e5 2022-02-13 thomas uint32_t o;
626 f9c2e8e5 2022-02-13 thomas left = 0, right = totobj - packidx->nlargeobj - 1;
627 f9c2e8e5 2022-02-13 thomas while (left <= right) {
628 f9c2e8e5 2022-02-13 thomas i = ((left + right) / 2);
629 f9c2e8e5 2022-02-13 thomas o = packidx->sorted_offsets[i].offset;
630 f9c2e8e5 2022-02-13 thomas if (o == offset) {
631 f9c2e8e5 2022-02-13 thomas *idx = packidx->sorted_offsets[i].idx;
633 f9c2e8e5 2022-02-13 thomas } else if (offset > o)
634 f9c2e8e5 2022-02-13 thomas left = i + 1;
635 f9c2e8e5 2022-02-13 thomas else if (offset < o)
636 f9c2e8e5 2022-02-13 thomas right = i - 1;
640 f9c2e8e5 2022-02-13 thomas return NULL;
643 f9c2e8e5 2022-02-13 thomas const struct got_error *
644 f9c2e8e5 2022-02-13 thomas got_packidx_get_object_id(struct got_object_id *id,
645 f9c2e8e5 2022-02-13 thomas struct got_packidx *packidx, int idx)
647 f9c2e8e5 2022-02-13 thomas uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
648 f9c2e8e5 2022-02-13 thomas struct got_packidx_object_id *oid;
650 f9c2e8e5 2022-02-13 thomas if (idx < 0 || idx >= totobj)
651 f9c2e8e5 2022-02-13 thomas return got_error(GOT_ERR_NO_OBJ);
653 f9c2e8e5 2022-02-13 thomas oid = &packidx->hdr.sorted_ids[idx];
654 f9c2e8e5 2022-02-13 thomas memcpy(id->sha1, oid->sha1, SHA1_DIGEST_LENGTH);
655 f9c2e8e5 2022-02-13 thomas return NULL;
658 f9c2e8e5 2022-02-13 thomas const struct got_error *
659 dd88155e 2019-06-29 stsp got_packidx_match_id_str_prefix(struct got_object_id_queue *matched_ids,
660 4277420a 2019-06-29 stsp struct got_packidx *packidx, const char *id_str_prefix)
662 dd88155e 2019-06-29 stsp const struct got_error *err = NULL;
663 4277420a 2019-06-29 stsp u_int8_t id0;
664 78fb0967 2020-09-09 naddy uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
665 4277420a 2019-06-29 stsp char hex[3];
666 4277420a 2019-06-29 stsp size_t prefix_len = strlen(id_str_prefix);
667 e09a504c 2019-06-28 stsp struct got_packidx_object_id *oid;
668 ec138a87 2022-01-03 thomas uint32_t i = 0;
670 dbdddfee 2021-06-23 naddy STAILQ_INIT(matched_ids);
672 4277420a 2019-06-29 stsp if (prefix_len < 2)
673 6dd1ece6 2019-11-10 stsp return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
675 4277420a 2019-06-29 stsp hex[0] = id_str_prefix[0];
676 4277420a 2019-06-29 stsp hex[1] = id_str_prefix[1];
677 4277420a 2019-06-29 stsp hex[2] = '\0';
678 4277420a 2019-06-29 stsp if (!got_parse_xdigit(&id0, hex))
679 6dd1ece6 2019-11-10 stsp return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
681 ec138a87 2022-01-03 thomas if (id0 > 0)
682 ec138a87 2022-01-03 thomas i = be32toh(packidx->hdr.fanout_table[id0 - 1]);
683 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[i];
684 4277420a 2019-06-29 stsp while (i < totobj && oid->sha1[0] == id0) {
685 4277420a 2019-06-29 stsp char id_str[SHA1_DIGEST_STRING_LENGTH];
686 dd88155e 2019-06-29 stsp struct got_object_qid *qid;
689 4277420a 2019-06-29 stsp if (!got_sha1_digest_to_str(oid->sha1, id_str, sizeof(id_str)))
690 4277420a 2019-06-29 stsp return got_error(GOT_ERR_NO_SPACE);
692 4277420a 2019-06-29 stsp cmp = strncmp(id_str, id_str_prefix, prefix_len);
693 4277420a 2019-06-29 stsp if (cmp < 0) {
694 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[++i];
696 4277420a 2019-06-29 stsp } else if (cmp > 0)
699 dd88155e 2019-06-29 stsp err = got_object_qid_alloc_partial(&qid);
702 ec242592 2022-04-22 thomas memcpy(qid->id.sha1, oid->sha1, SHA1_DIGEST_LENGTH);
703 dbdddfee 2021-06-23 naddy STAILQ_INSERT_TAIL(matched_ids, qid, entry);
705 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[++i];
709 0adc7bcc 2019-06-29 stsp got_object_id_queue_free(matched_ids);
710 68036464 2022-06-26 thomas return err;
713 68036464 2022-06-26 thomas static void
714 68036464 2022-06-26 thomas set_max_datasize(void)
716 68036464 2022-06-26 thomas struct rlimit rl;
718 68036464 2022-06-26 thomas if (getrlimit(RLIMIT_DATA, &rl) != 0)
721 68036464 2022-06-26 thomas rl.rlim_cur = rl.rlim_max;
722 68036464 2022-06-26 thomas setrlimit(RLIMIT_DATA, &rl);
725 68036464 2022-06-26 thomas const struct got_error *
726 68036464 2022-06-26 thomas got_pack_start_privsep_child(struct got_pack *pack, struct got_packidx *packidx)
728 68036464 2022-06-26 thomas const struct got_error *err = NULL;
729 68036464 2022-06-26 thomas int imsg_fds[2];
730 68036464 2022-06-26 thomas pid_t pid;
731 68036464 2022-06-26 thomas struct imsgbuf *ibuf;
733 68036464 2022-06-26 thomas ibuf = calloc(1, sizeof(*ibuf));
734 68036464 2022-06-26 thomas if (ibuf == NULL)
735 68036464 2022-06-26 thomas return got_error_from_errno("calloc");
737 68036464 2022-06-26 thomas pack->privsep_child = calloc(1, sizeof(*pack->privsep_child));
738 68036464 2022-06-26 thomas if (pack->privsep_child == NULL) {
739 68036464 2022-06-26 thomas err = got_error_from_errno("calloc");
740 68036464 2022-06-26 thomas free(ibuf);
741 68036464 2022-06-26 thomas return err;
743 68036464 2022-06-26 thomas pack->child_has_tempfiles = 0;
744 68036464 2022-06-26 thomas pack->child_has_delta_outfd = 0;
746 68036464 2022-06-26 thomas if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fds) == -1) {
747 68036464 2022-06-26 thomas err = got_error_from_errno("socketpair");
748 68036464 2022-06-26 thomas goto done;
751 68036464 2022-06-26 thomas pid = fork();
752 68036464 2022-06-26 thomas if (pid == -1) {
753 68036464 2022-06-26 thomas err = got_error_from_errno("fork");
754 68036464 2022-06-26 thomas goto done;
755 68036464 2022-06-26 thomas } else if (pid == 0) {
756 68036464 2022-06-26 thomas set_max_datasize();
757 68036464 2022-06-26 thomas got_privsep_exec_child(imsg_fds, GOT_PATH_PROG_READ_PACK,
758 68036464 2022-06-26 thomas pack->path_packfile);
759 68036464 2022-06-26 thomas /* not reached */
762 68036464 2022-06-26 thomas if (close(imsg_fds[1]) == -1)
763 68036464 2022-06-26 thomas return got_error_from_errno("close");
764 68036464 2022-06-26 thomas pack->privsep_child->imsg_fd = imsg_fds[0];
765 68036464 2022-06-26 thomas pack->privsep_child->pid = pid;
766 68036464 2022-06-26 thomas imsg_init(ibuf, imsg_fds[0]);
767 68036464 2022-06-26 thomas pack->privsep_child->ibuf = ibuf;
769 68036464 2022-06-26 thomas err = got_privsep_init_pack_child(ibuf, pack, packidx);
770 68036464 2022-06-26 thomas if (err) {
771 68036464 2022-06-26 thomas const struct got_error *child_err;
772 68036464 2022-06-26 thomas err = got_privsep_send_stop(pack->privsep_child->imsg_fd);
773 68036464 2022-06-26 thomas child_err = got_privsep_wait_for_child(
774 68036464 2022-06-26 thomas pack->privsep_child->pid);
775 68036464 2022-06-26 thomas if (child_err && err == NULL)
776 68036464 2022-06-26 thomas err = child_err;
779 68036464 2022-06-26 thomas if (err) {
780 68036464 2022-06-26 thomas free(ibuf);
781 68036464 2022-06-26 thomas free(pack->privsep_child);
782 68036464 2022-06-26 thomas pack->privsep_child = NULL;
784 dd88155e 2019-06-29 stsp return err;
787 b4f37570 2021-06-19 stsp static const struct got_error *
788 b4f37570 2021-06-19 stsp pack_stop_privsep_child(struct got_pack *pack)
790 96732e0b 2018-11-11 stsp const struct got_error *err = NULL;
792 876c234b 2018-09-10 stsp if (pack->privsep_child == NULL)
793 876c234b 2018-09-10 stsp return NULL;
795 876c234b 2018-09-10 stsp err = got_privsep_send_stop(pack->privsep_child->imsg_fd);
797 96732e0b 2018-11-11 stsp return err;
798 96732e0b 2018-11-11 stsp err = got_privsep_wait_for_child(pack->privsep_child->pid);
799 08578a35 2021-01-22 stsp if (close(pack->privsep_child->imsg_fd) == -1 && err == NULL)
800 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
801 cc2a8ef4 2021-06-19 tracey free(pack->privsep_child->ibuf);
802 876c234b 2018-09-10 stsp free(pack->privsep_child);
803 876c234b 2018-09-10 stsp pack->privsep_child = NULL;
804 876c234b 2018-09-10 stsp return err;
807 d7464085 2018-07-09 stsp const struct got_error *
808 7e656b93 2018-03-17 stsp got_pack_close(struct got_pack *pack)
810 d7464085 2018-07-09 stsp const struct got_error *err = NULL;
812 b4f37570 2021-06-19 stsp err = pack_stop_privsep_child(pack);
813 876c234b 2018-09-10 stsp if (pack->map && munmap(pack->map, pack->filesize) == -1 && !err)
814 638f9024 2019-05-13 stsp err = got_error_from_errno("munmap");
815 08578a35 2021-01-22 stsp if (pack->fd != -1 && close(pack->fd) == -1 && err == NULL)
816 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
817 8b2180d4 2018-04-26 stsp pack->fd = -1;
818 4589e373 2018-03-17 stsp free(pack->path_packfile);
819 4589e373 2018-03-17 stsp pack->path_packfile = NULL;
820 4589e373 2018-03-17 stsp pack->filesize = 0;
821 ab2f42e7 2019-11-10 stsp if (pack->delta_cache) {
822 ab2f42e7 2019-11-10 stsp got_delta_cache_free(pack->delta_cache);
823 ab2f42e7 2019-11-10 stsp pack->delta_cache = NULL;
827 bfb5ee0b 2022-05-31 thomas * Leave accumfd and basefd alone. They are managed by the
828 bfb5ee0b 2022-05-31 thomas * repository layer and can be reused.
831 c7fe698a 2018-01-23 stsp return err;
834 668a20f6 2020-03-18 stsp const struct got_error *
835 668a20f6 2020-03-18 stsp got_pack_parse_object_type_and_size(uint8_t *type, uint64_t *size, size_t *len,
836 d7464085 2018-07-09 stsp struct got_pack *pack, off_t offset)
838 a487c1d0 2018-01-14 stsp uint8_t t = 0;
839 a487c1d0 2018-01-14 stsp uint64_t s = 0;
840 a487c1d0 2018-01-14 stsp uint8_t sizeN;
841 d7464085 2018-07-09 stsp size_t mapoff = 0;
846 d7464085 2018-07-09 stsp if (offset >= pack->filesize)
847 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
849 d7464085 2018-07-09 stsp if (pack->map) {
850 d7464085 2018-07-09 stsp mapoff = (size_t)offset;
852 d7464085 2018-07-09 stsp if (lseek(pack->fd, offset, SEEK_SET) == -1)
853 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
857 a1fd68d8 2018-01-12 stsp /* We do not support size values which don't fit in 64 bit. */
859 a487c1d0 2018-01-14 stsp return got_error(GOT_ERR_NO_SPACE);
861 d7464085 2018-07-09 stsp if (pack->map) {
862 1944573a 2022-01-10 thomas if (mapoff + sizeof(sizeN) >= pack->filesize)
863 1944573a 2022-01-10 thomas return got_error(GOT_ERR_BAD_PACKFILE);
864 d7464085 2018-07-09 stsp sizeN = *(pack->map + mapoff);
865 d7464085 2018-07-09 stsp mapoff += sizeof(sizeN);
867 d7464085 2018-07-09 stsp ssize_t n = read(pack->fd, &sizeN, sizeof(sizeN));
869 638f9024 2019-05-13 stsp return got_error_from_errno("read");
870 d7464085 2018-07-09 stsp if (n != sizeof(sizeN))
871 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
873 d7464085 2018-07-09 stsp *len += sizeof(sizeN);
875 a1fd68d8 2018-01-12 stsp if (i == 0) {
876 a487c1d0 2018-01-14 stsp t = (sizeN & GOT_PACK_OBJ_SIZE0_TYPE_MASK) >>
877 a1fd68d8 2018-01-12 stsp GOT_PACK_OBJ_SIZE0_TYPE_MASK_SHIFT;
878 a487c1d0 2018-01-14 stsp s = (sizeN & GOT_PACK_OBJ_SIZE0_VAL_MASK);
880 a1fd68d8 2018-01-12 stsp size_t shift = 4 + 7 * (i - 1);
881 a487c1d0 2018-01-14 stsp s |= ((sizeN & GOT_PACK_OBJ_SIZE_VAL_MASK) << shift);
884 a1fd68d8 2018-01-12 stsp } while (sizeN & GOT_PACK_OBJ_SIZE_MORE);
888 a487c1d0 2018-01-14 stsp return NULL;
891 a1fd68d8 2018-01-12 stsp static const struct got_error *
892 5f25cc85 2019-11-26 stsp open_plain_object(struct got_object **obj, struct got_object_id *id,
893 5f25cc85 2019-11-26 stsp uint8_t type, off_t offset, size_t size, int idx)
895 6ccb713b 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
896 6ccb713b 2018-01-19 stsp if (*obj == NULL)
897 638f9024 2019-05-13 stsp return got_error_from_errno("calloc");
899 6ccb713b 2018-01-19 stsp (*obj)->type = type;
900 6ccb713b 2018-01-19 stsp (*obj)->flags = GOT_OBJ_FLAG_PACKED;
901 c59b3346 2018-09-11 stsp (*obj)->pack_idx = idx;
902 6ccb713b 2018-01-19 stsp (*obj)->hdrlen = 0;
903 6ccb713b 2018-01-19 stsp (*obj)->size = size;
904 106807b4 2018-09-15 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
905 6ccb713b 2018-01-19 stsp (*obj)->pack_offset = offset;
907 b107e67f 2018-01-19 stsp return NULL;
910 b107e67f 2018-01-19 stsp static const struct got_error *
911 d7464085 2018-07-09 stsp parse_negative_offset(int64_t *offset, size_t *len, struct got_pack *pack,
912 d7464085 2018-07-09 stsp off_t delta_offset)
914 b107e67f 2018-01-19 stsp int64_t o = 0;
915 b107e67f 2018-01-19 stsp uint8_t offN;
918 a0de39f3 2019-08-09 stsp *offset = 0;
922 b107e67f 2018-01-19 stsp /* We do not support offset values which don't fit in 64 bit. */
924 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_NO_SPACE);
926 d7464085 2018-07-09 stsp if (pack->map) {
927 d7464085 2018-07-09 stsp size_t mapoff;
928 d7464085 2018-07-09 stsp mapoff = (size_t)delta_offset + *len;
929 1944573a 2022-01-10 thomas if (mapoff + sizeof(offN) >= pack->filesize)
930 1944573a 2022-01-10 thomas return got_error(GOT_ERR_PACK_OFFSET);
931 d7464085 2018-07-09 stsp offN = *(pack->map + mapoff);
934 d7464085 2018-07-09 stsp n = read(pack->fd, &offN, sizeof(offN));
936 638f9024 2019-05-13 stsp return got_error_from_errno("read");
937 d7464085 2018-07-09 stsp if (n != sizeof(offN))
938 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
940 d7464085 2018-07-09 stsp *len += sizeof(offN);
942 b107e67f 2018-01-19 stsp if (i == 0)
943 b107e67f 2018-01-19 stsp o = (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
947 cecc778e 2018-01-23 stsp o += (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
950 b107e67f 2018-01-19 stsp } while (offN & GOT_PACK_OBJ_DELTA_OFF_MORE);
952 b107e67f 2018-01-19 stsp *offset = o;
953 6ccb713b 2018-01-19 stsp return NULL;
956 668a20f6 2020-03-18 stsp const struct got_error *
957 48b4f239 2021-12-31 thomas got_pack_parse_offset_delta(off_t *base_offset, size_t *len,
958 48b4f239 2021-12-31 thomas struct got_pack *pack, off_t offset, int tslen)
960 96f5e8b3 2018-01-23 stsp const struct got_error *err;
961 b107e67f 2018-01-19 stsp int64_t negoffset;
962 b107e67f 2018-01-19 stsp size_t negofflen;
966 d7464085 2018-07-09 stsp err = parse_negative_offset(&negoffset, &negofflen, pack,
967 d7464085 2018-07-09 stsp offset + tslen);
969 b107e67f 2018-01-19 stsp return err;
971 b107e67f 2018-01-19 stsp /* Compute the base object's offset (must be in the same pack file). */
972 96f5e8b3 2018-01-23 stsp *base_offset = (offset - negoffset);
973 96f5e8b3 2018-01-23 stsp if (*base_offset <= 0)
974 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_BAD_PACKFILE);
976 d7464085 2018-07-09 stsp *len = negofflen;
977 96f5e8b3 2018-01-23 stsp return NULL;
980 0e22967e 2018-02-11 stsp static const struct got_error *
981 42c69117 2019-11-10 stsp read_delta_data(uint8_t **delta_buf, size_t *delta_len,
982 9249e7e3 2022-05-12 thomas size_t *delta_compressed_len, size_t delta_data_offset,
983 9249e7e3 2022-05-12 thomas struct got_pack *pack)
985 42c69117 2019-11-10 stsp const struct got_error *err = NULL;
986 9249e7e3 2022-05-12 thomas size_t consumed = 0;
988 42c69117 2019-11-10 stsp if (pack->map) {
989 42c69117 2019-11-10 stsp if (delta_data_offset >= pack->filesize)
990 42c69117 2019-11-10 stsp return got_error(GOT_ERR_PACK_OFFSET);
991 2e5a6fad 2020-03-18 stsp err = got_inflate_to_mem_mmap(delta_buf, delta_len,
992 9249e7e3 2022-05-12 thomas &consumed, NULL, pack->map, delta_data_offset,
993 2e5a6fad 2020-03-18 stsp pack->filesize - delta_data_offset);
995 9249e7e3 2022-05-12 thomas return err;
997 42c69117 2019-11-10 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET) == -1)
998 42c69117 2019-11-10 stsp return got_error_from_errno("lseek");
999 9249e7e3 2022-05-12 thomas err = got_inflate_to_mem_fd(delta_buf, delta_len,
1000 9249e7e3 2022-05-12 thomas &consumed, NULL, 0, pack->fd);
1001 9249e7e3 2022-05-12 thomas if (err)
1002 9249e7e3 2022-05-12 thomas return err;
1005 9249e7e3 2022-05-12 thomas if (delta_compressed_len)
1006 9249e7e3 2022-05-12 thomas *delta_compressed_len = consumed;
1008 9249e7e3 2022-05-12 thomas return NULL;
1011 96f5e8b3 2018-01-23 stsp static const struct got_error *
1012 c336f889 2018-07-23 stsp add_delta(struct got_delta_chain *deltas, off_t delta_offset, size_t tslen,
1013 42c69117 2019-11-10 stsp int delta_type, size_t delta_size, size_t delta_data_offset)
1015 bdd2fbb3 2018-02-11 stsp struct got_delta *delta;
1017 c336f889 2018-07-23 stsp delta = got_delta_open(delta_offset, tslen, delta_type, delta_size,
1018 42c69117 2019-11-10 stsp delta_data_offset);
1019 bdd2fbb3 2018-02-11 stsp if (delta == NULL)
1020 638f9024 2019-05-13 stsp return got_error_from_errno("got_delta_open");
1021 bdd2fbb3 2018-02-11 stsp /* delta is freed in got_object_close() */
1022 bdd2fbb3 2018-02-11 stsp deltas->nentries++;
1023 dbdddfee 2021-06-23 naddy STAILQ_INSERT_HEAD(&deltas->entries, delta, entry);
1024 bdd2fbb3 2018-02-11 stsp return NULL;
1027 bdd2fbb3 2018-02-11 stsp static const struct got_error *
1028 6b9c9673 2018-01-23 stsp resolve_offset_delta(struct got_delta_chain *deltas,
1029 c8ecd499 2018-09-09 stsp struct got_packidx *packidx, struct got_pack *pack, off_t delta_offset,
1030 c8ecd499 2018-09-09 stsp size_t tslen, int delta_type, size_t delta_size, unsigned int recursion)
1033 a3500804 2018-01-23 stsp const struct got_error *err;
1034 c3703302 2018-01-23 stsp off_t base_offset;
1035 c3703302 2018-01-23 stsp uint8_t base_type;
1036 c3703302 2018-01-23 stsp uint64_t base_size;
1037 c3703302 2018-01-23 stsp size_t base_tslen;
1038 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
1039 42c69117 2019-11-10 stsp size_t consumed;
1041 668a20f6 2020-03-18 stsp err = got_pack_parse_offset_delta(&base_offset, &consumed, pack,
1042 d7464085 2018-07-09 stsp delta_offset, tslen);
1044 a3500804 2018-01-23 stsp return err;
1046 d7464085 2018-07-09 stsp delta_data_offset = delta_offset + tslen + consumed;
1047 d7464085 2018-07-09 stsp if (delta_data_offset >= pack->filesize)
1048 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1050 d7464085 2018-07-09 stsp if (pack->map == NULL) {
1051 d7464085 2018-07-09 stsp delta_data_offset = lseek(pack->fd, 0, SEEK_CUR);
1052 d7464085 2018-07-09 stsp if (delta_data_offset == -1)
1053 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
1056 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type, delta_size,
1057 42c69117 2019-11-10 stsp delta_data_offset);
1059 1a35c1bc 2019-05-22 stsp return err;
1061 c3703302 2018-01-23 stsp /* An offset delta must be in the same packfile. */
1062 1a35c1bc 2019-05-22 stsp if (base_offset >= pack->filesize)
1063 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_PACK_OFFSET);
1065 668a20f6 2020-03-18 stsp err = got_pack_parse_object_type_and_size(&base_type, &base_size,
1066 668a20f6 2020-03-18 stsp &base_tslen, pack, base_offset);
1068 1a35c1bc 2019-05-22 stsp return err;
1070 668a20f6 2020-03-18 stsp return got_pack_resolve_delta_chain(deltas, packidx, pack, base_offset,
1071 b0e2201a 2018-06-22 stsp base_tslen, base_type, base_size, recursion - 1);
1074 c4330eff 2021-06-22 stsp const struct got_error *
1075 c4330eff 2021-06-22 stsp got_pack_parse_ref_delta(struct got_object_id *id,
1076 c4330eff 2021-06-22 stsp struct got_pack *pack, off_t delta_offset, int tslen)
1078 c4330eff 2021-06-22 stsp if (pack->map) {
1079 c4330eff 2021-06-22 stsp size_t mapoff = delta_offset + tslen;
1080 1944573a 2022-01-10 thomas if (mapoff + sizeof(*id) >= pack->filesize)
1081 1944573a 2022-01-10 thomas return got_error(GOT_ERR_PACK_OFFSET);
1082 c4330eff 2021-06-22 stsp memcpy(id, pack->map + mapoff, sizeof(*id));
1084 c4330eff 2021-06-22 stsp ssize_t n;
1085 c4330eff 2021-06-22 stsp n = read(pack->fd, id, sizeof(*id));
1086 c4330eff 2021-06-22 stsp if (n < 0)
1087 c4330eff 2021-06-22 stsp return got_error_from_errno("read");
1088 c4330eff 2021-06-22 stsp if (n != sizeof(*id))
1089 c4330eff 2021-06-22 stsp return got_error(GOT_ERR_BAD_PACKFILE);
1092 c4330eff 2021-06-22 stsp return NULL;
1095 c3703302 2018-01-23 stsp static const struct got_error *
1096 c8ecd499 2018-09-09 stsp resolve_ref_delta(struct got_delta_chain *deltas, struct got_packidx *packidx,
1097 c8ecd499 2018-09-09 stsp struct got_pack *pack, off_t delta_offset, size_t tslen, int delta_type,
1098 c8ecd499 2018-09-09 stsp size_t delta_size, unsigned int recursion)
1100 6b9c9673 2018-01-23 stsp const struct got_error *err;
1101 6b9c9673 2018-01-23 stsp struct got_object_id id;
1103 6b9c9673 2018-01-23 stsp off_t base_offset;
1104 6b9c9673 2018-01-23 stsp uint8_t base_type;
1105 6b9c9673 2018-01-23 stsp uint64_t base_size;
1106 6b9c9673 2018-01-23 stsp size_t base_tslen;
1107 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
1109 42c69117 2019-11-10 stsp if (delta_offset + tslen >= pack->filesize)
1110 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1112 c4330eff 2021-06-22 stsp err = got_pack_parse_ref_delta(&id, pack, delta_offset, tslen);
1114 c4330eff 2021-06-22 stsp return err;
1115 d7464085 2018-07-09 stsp if (pack->map) {
1116 c4330eff 2021-06-22 stsp delta_data_offset = delta_offset + tslen + sizeof(id);
1118 e40b19ed 2020-01-06 stsp delta_data_offset = lseek(pack->fd, 0, SEEK_CUR);
1119 e40b19ed 2020-01-06 stsp if (delta_data_offset == -1)
1120 e40b19ed 2020-01-06 stsp return got_error_from_errno("lseek");
1123 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type, delta_size,
1124 42c69117 2019-11-10 stsp delta_data_offset);
1126 1a35c1bc 2019-05-22 stsp return err;
1128 652b2703 2018-06-22 stsp /* Delta base must be in the same pack file. */
1129 1510f469 2018-09-09 stsp idx = got_packidx_get_object_idx(packidx, &id);
1130 1a35c1bc 2019-05-22 stsp if (idx == -1)
1131 668a20f6 2020-03-18 stsp return got_error(GOT_ERR_NO_OBJ);
1133 02828bfd 2021-06-22 stsp base_offset = got_packidx_get_object_offset(packidx, idx);
1134 1a35c1bc 2019-05-22 stsp if (base_offset == (uint64_t)-1)
1135 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_BAD_PACKIDX);
1137 1a35c1bc 2019-05-22 stsp if (base_offset >= pack->filesize)
1138 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_PACK_OFFSET);
1140 668a20f6 2020-03-18 stsp err = got_pack_parse_object_type_and_size(&base_type, &base_size,
1141 668a20f6 2020-03-18 stsp &base_tslen, pack, base_offset);
1143 1a35c1bc 2019-05-22 stsp return err;
1145 668a20f6 2020-03-18 stsp return got_pack_resolve_delta_chain(deltas, packidx, pack, base_offset,
1146 0c048b15 2018-04-27 stsp base_tslen, base_type, base_size, recursion - 1);
1149 668a20f6 2020-03-18 stsp const struct got_error *
1150 668a20f6 2020-03-18 stsp got_pack_resolve_delta_chain(struct got_delta_chain *deltas,
1151 668a20f6 2020-03-18 stsp struct got_packidx *packidx, struct got_pack *pack, off_t delta_offset,
1152 668a20f6 2020-03-18 stsp size_t tslen, int delta_type, size_t delta_size, unsigned int recursion)
1154 c3703302 2018-01-23 stsp const struct got_error *err = NULL;
1156 5b7e13a7 2018-04-02 stsp if (--recursion == 0)
1157 5b7e13a7 2018-04-02 stsp return got_error(GOT_ERR_RECURSION);
1159 c3703302 2018-01-23 stsp switch (delta_type) {
1160 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_COMMIT:
1161 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TREE:
1162 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_BLOB:
1163 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TAG:
1164 c3703302 2018-01-23 stsp /* Plain types are the final delta base. Recursion ends. */
1165 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type,
1166 42c69117 2019-11-10 stsp delta_size, 0);
1168 a3500804 2018-01-23 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
1169 c8ecd499 2018-09-09 stsp err = resolve_offset_delta(deltas, packidx, pack,
1170 b0e2201a 2018-06-22 stsp delta_offset, tslen, delta_type, delta_size, recursion - 1);
1172 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_REF_DELTA:
1173 c8ecd499 2018-09-09 stsp err = resolve_ref_delta(deltas, packidx, pack,
1174 b0e2201a 2018-06-22 stsp delta_offset, tslen, delta_type, delta_size, recursion - 1);
1177 4810de4a 2018-04-01 stsp return got_error(GOT_ERR_OBJ_TYPE);
1180 96f5e8b3 2018-01-23 stsp return err;
1183 96f5e8b3 2018-01-23 stsp static const struct got_error *
1184 a98c62b1 2018-09-09 stsp open_delta_object(struct got_object **obj, struct got_packidx *packidx,
1185 a98c62b1 2018-09-09 stsp struct got_pack *pack, struct got_object_id *id, off_t offset,
1186 c59b3346 2018-09-11 stsp size_t tslen, int delta_type, size_t delta_size, int idx)
1188 96f5e8b3 2018-01-23 stsp const struct got_error *err = NULL;
1189 96f5e8b3 2018-01-23 stsp int resolved_type;
1191 b107e67f 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
1192 b107e67f 2018-01-19 stsp if (*obj == NULL)
1193 638f9024 2019-05-13 stsp return got_error_from_errno("calloc");
1195 96f5e8b3 2018-01-23 stsp (*obj)->flags = 0;
1196 b107e67f 2018-01-19 stsp (*obj)->hdrlen = 0;
1197 39e73dc9 2018-03-03 stsp (*obj)->size = 0; /* Not known because deltas aren't applied yet. */
1198 106807b4 2018-09-15 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
1199 cecc778e 2018-01-23 stsp (*obj)->pack_offset = offset + tslen;
1201 dbdddfee 2021-06-23 naddy STAILQ_INIT(&(*obj)->deltas.entries);
1202 1a35c1bc 2019-05-22 stsp (*obj)->flags |= GOT_OBJ_FLAG_DELTIFIED;
1203 96f5e8b3 2018-01-23 stsp (*obj)->flags |= GOT_OBJ_FLAG_PACKED;
1204 c59b3346 2018-09-11 stsp (*obj)->pack_idx = idx;
1206 668a20f6 2020-03-18 stsp err = got_pack_resolve_delta_chain(&(*obj)->deltas, packidx, pack,
1207 668a20f6 2020-03-18 stsp offset, tslen, delta_type, delta_size,
1208 668a20f6 2020-03-18 stsp GOT_DELTA_CHAIN_RECURSION_MAX);
1210 96f5e8b3 2018-01-23 stsp goto done;
1212 96f5e8b3 2018-01-23 stsp err = got_delta_chain_get_base_type(&resolved_type, &(*obj)->deltas);
1214 96f5e8b3 2018-01-23 stsp goto done;
1215 96f5e8b3 2018-01-23 stsp (*obj)->type = resolved_type;
1217 96f5e8b3 2018-01-23 stsp if (err) {
1218 96f5e8b3 2018-01-23 stsp got_object_close(*obj);
1219 96f5e8b3 2018-01-23 stsp *obj = NULL;
1221 96f5e8b3 2018-01-23 stsp return err;
1224 2090a03d 2018-09-09 stsp const struct got_error *
1225 2090a03d 2018-09-09 stsp got_packfile_open_object(struct got_object **obj, struct got_pack *pack,
1226 6fd11751 2018-06-04 stsp struct got_packidx *packidx, int idx, struct got_object_id *id)
1228 a1fd68d8 2018-01-12 stsp const struct got_error *err = NULL;
1229 a1fd68d8 2018-01-12 stsp off_t offset;
1230 6c00b545 2018-01-17 stsp uint8_t type;
1231 6c00b545 2018-01-17 stsp uint64_t size;
1232 3ee5fc21 2018-01-17 stsp size_t tslen;
1234 6c00b545 2018-01-17 stsp *obj = NULL;
1236 02828bfd 2021-06-22 stsp offset = got_packidx_get_object_offset(packidx, idx);
1237 a1fd68d8 2018-01-12 stsp if (offset == (uint64_t)-1)
1238 a1fd68d8 2018-01-12 stsp return got_error(GOT_ERR_BAD_PACKIDX);
1240 668a20f6 2020-03-18 stsp err = got_pack_parse_object_type_and_size(&type, &size, &tslen,
1241 668a20f6 2020-03-18 stsp pack, offset);
1243 35c73765 2018-09-09 stsp return err;
1245 6c00b545 2018-01-17 stsp switch (type) {
1246 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_COMMIT:
1247 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_TREE:
1248 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_BLOB:
1249 d33fc9ef 2018-01-23 stsp case GOT_OBJ_TYPE_TAG:
1250 5f25cc85 2019-11-26 stsp err = open_plain_object(obj, id, type, offset + tslen,
1251 5f25cc85 2019-11-26 stsp size, idx);
1253 b107e67f 2018-01-19 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
1254 a48db7e5 2018-01-23 stsp case GOT_OBJ_TYPE_REF_DELTA:
1255 a98c62b1 2018-09-09 stsp err = open_delta_object(obj, packidx, pack, id, offset,
1256 c59b3346 2018-09-11 stsp tslen, type, size, idx);
1259 4810de4a 2018-04-01 stsp err = got_error(GOT_ERR_OBJ_TYPE);
1263 3ee5fc21 2018-01-17 stsp return err;
1266 d582f26c 2020-03-18 stsp const struct got_error *
1267 48b4f239 2021-12-31 thomas got_pack_get_delta_chain_max_size(uint64_t *max_size,
1268 48b4f239 2021-12-31 thomas struct got_delta_chain *deltas, struct got_pack *pack)
1270 22484865 2018-03-13 stsp struct got_delta *delta;
1271 22484865 2018-03-13 stsp uint64_t base_size = 0, result_size = 0;
1273 22484865 2018-03-13 stsp *max_size = 0;
1274 dbdddfee 2021-06-23 naddy STAILQ_FOREACH(delta, &deltas->entries, entry) {
1275 22484865 2018-03-13 stsp /* Plain object types are the delta base. */
1276 22484865 2018-03-13 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1277 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1278 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1279 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1280 22484865 2018-03-13 stsp const struct got_error *err;
1281 42c69117 2019-11-10 stsp uint8_t *delta_buf;
1282 42c69117 2019-11-10 stsp size_t delta_len;
1283 ab2f42e7 2019-11-10 stsp int cached = 1;
1285 ab2f42e7 2019-11-10 stsp got_delta_cache_get(&delta_buf, &delta_len,
1286 ab2f42e7 2019-11-10 stsp pack->delta_cache, delta->data_offset);
1287 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1288 ab2f42e7 2019-11-10 stsp cached = 0;
1289 ab2f42e7 2019-11-10 stsp err = read_delta_data(&delta_buf, &delta_len,
1290 9249e7e3 2022-05-12 thomas NULL, delta->data_offset, pack);
1292 ab2f42e7 2019-11-10 stsp return err;
1293 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1294 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1295 ab2f42e7 2019-11-10 stsp if (err == NULL)
1296 ab2f42e7 2019-11-10 stsp cached = 1;
1297 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1298 ab2f42e7 2019-11-10 stsp free(delta_buf);
1299 ab2f42e7 2019-11-10 stsp return err;
1302 a53d2f13 2018-03-17 stsp err = got_delta_get_sizes(&base_size, &result_size,
1303 42c69117 2019-11-10 stsp delta_buf, delta_len);
1304 ab2f42e7 2019-11-10 stsp if (!cached)
1305 ab2f42e7 2019-11-10 stsp free(delta_buf);
1307 22484865 2018-03-13 stsp return err;
1309 22484865 2018-03-13 stsp base_size = delta->size;
1310 22484865 2018-03-13 stsp if (base_size > *max_size)
1311 22484865 2018-03-13 stsp *max_size = base_size;
1312 22484865 2018-03-13 stsp if (result_size > *max_size)
1313 22484865 2018-03-13 stsp *max_size = result_size;
1316 9feb4ff2 2018-03-14 stsp return NULL;
1319 ac544f8c 2019-01-13 stsp const struct got_error *
1320 42c69117 2019-11-10 stsp got_pack_get_max_delta_object_size(uint64_t *size, struct got_object *obj,
1321 42c69117 2019-11-10 stsp struct got_pack *pack)
1323 85a703fa 2019-01-13 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0)
1324 85a703fa 2019-01-13 stsp return got_error(GOT_ERR_OBJ_TYPE);
1326 d582f26c 2020-03-18 stsp return got_pack_get_delta_chain_max_size(size, &obj->deltas, pack);
1329 668a20f6 2020-03-18 stsp const struct got_error *
1330 4788f1ce 2020-03-18 stsp got_pack_dump_delta_chain_to_file(size_t *result_size,
1331 4788f1ce 2020-03-18 stsp struct got_delta_chain *deltas, struct got_pack *pack, FILE *outfile,
1332 4788f1ce 2020-03-18 stsp FILE *base_file, FILE *accum_file)
1334 efd2a263 2018-01-19 stsp const struct got_error *err = NULL;
1335 6691714a 2018-01-23 stsp struct got_delta *delta;
1336 42c69117 2019-11-10 stsp uint8_t *base_buf = NULL, *accum_buf = NULL, *delta_buf;
1337 210941d5 2022-05-31 thomas size_t base_bufsz = 0, accum_bufsz = 0, accum_size = 0, delta_len;
1338 210941d5 2022-05-31 thomas /* We process small enough files entirely in memory for speed. */
1339 210941d5 2022-05-31 thomas const size_t max_bufsize = GOT_DELTA_RESULT_SIZE_CACHED_MAX;
1340 210941d5 2022-05-31 thomas uint64_t max_size = 0;
1341 6691714a 2018-01-23 stsp int n = 0;
1343 b29656e2 2018-03-16 stsp *result_size = 0;
1345 dbdddfee 2021-06-23 naddy if (STAILQ_EMPTY(&deltas->entries))
1346 6691714a 2018-01-23 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
1348 210941d5 2022-05-31 thomas if (fseeko(base_file, 0L, SEEK_SET) == -1)
1349 210941d5 2022-05-31 thomas return got_error_from_errno("fseeko");
1350 210941d5 2022-05-31 thomas if (fseeko(accum_file, 0L, SEEK_SET) == -1)
1351 210941d5 2022-05-31 thomas return got_error_from_errno("fseeko");
1353 6691714a 2018-01-23 stsp /* Deltas are ordered in ascending order. */
1354 dbdddfee 2021-06-23 naddy STAILQ_FOREACH(delta, &deltas->entries, entry) {
1355 210941d5 2022-05-31 thomas uint64_t base_size, result_size = 0;
1356 ab2f42e7 2019-11-10 stsp int cached = 1;
1357 a6b158cc 2018-02-11 stsp if (n == 0) {
1358 34fca9c3 2018-11-11 stsp size_t mapoff;
1359 0c048b15 2018-04-27 stsp off_t delta_data_offset;
1361 a6b158cc 2018-02-11 stsp /* Plain object types are the delta base. */
1362 a6b158cc 2018-02-11 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1363 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1364 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1365 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1366 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1367 72eb3431 2018-04-01 stsp goto done;
1370 0c048b15 2018-04-27 stsp delta_data_offset = delta->offset + delta->tslen;
1371 0c048b15 2018-04-27 stsp if (delta_data_offset >= pack->filesize) {
1372 0c048b15 2018-04-27 stsp err = got_error(GOT_ERR_PACK_OFFSET);
1373 0c048b15 2018-04-27 stsp goto done;
1375 d7464085 2018-07-09 stsp if (pack->map == NULL) {
1376 d7464085 2018-07-09 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET)
1378 638f9024 2019-05-13 stsp err = got_error_from_errno("lseek");
1379 d7464085 2018-07-09 stsp goto done;
1382 210941d5 2022-05-31 thomas if (delta->size > max_size)
1383 210941d5 2022-05-31 thomas max_size = delta->size;
1384 210941d5 2022-05-31 thomas if (max_size > max_bufsize) {
1385 d7464085 2018-07-09 stsp if (pack->map) {
1386 d7464085 2018-07-09 stsp mapoff = (size_t)delta_data_offset;
1387 d7464085 2018-07-09 stsp err = got_inflate_to_file_mmap(
1388 4788f1ce 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->map,
1389 4788f1ce 2020-03-18 stsp mapoff, pack->filesize - mapoff,
1390 4788f1ce 2020-03-18 stsp base_file);
1392 34fca9c3 2018-11-11 stsp err = got_inflate_to_file_fd(
1393 4788f1ce 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->fd,
1394 4788f1ce 2020-03-18 stsp base_file);
1396 210941d5 2022-05-31 thomas accum_buf = malloc(max_size);
1397 210941d5 2022-05-31 thomas if (accum_buf == NULL) {
1398 210941d5 2022-05-31 thomas err = got_error_from_errno("malloc");
1399 210941d5 2022-05-31 thomas goto done;
1401 210941d5 2022-05-31 thomas accum_bufsz = max_size;
1402 d7464085 2018-07-09 stsp if (pack->map) {
1403 d7464085 2018-07-09 stsp mapoff = (size_t)delta_data_offset;
1404 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&base_buf,
1405 2e5a6fad 2020-03-18 stsp &base_bufsz, NULL, NULL,
1406 2e5a6fad 2020-03-18 stsp pack->map, mapoff,
1407 d7464085 2018-07-09 stsp pack->filesize - mapoff);
1409 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&base_buf,
1410 55fdd257 2020-03-18 stsp &base_bufsz, NULL, NULL, max_size,
1411 55fdd257 2020-03-18 stsp pack->fd);
1414 a6b158cc 2018-02-11 stsp goto done;
1416 210941d5 2022-05-31 thomas if (base_buf == NULL)
1417 8628c62d 2018-03-15 stsp rewind(base_file);
1421 ab2f42e7 2019-11-10 stsp got_delta_cache_get(&delta_buf, &delta_len,
1422 ab2f42e7 2019-11-10 stsp pack->delta_cache, delta->data_offset);
1423 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1424 ab2f42e7 2019-11-10 stsp cached = 0;
1425 9249e7e3 2022-05-12 thomas err = read_delta_data(&delta_buf, &delta_len, NULL,
1426 ab2f42e7 2019-11-10 stsp delta->data_offset, pack);
1428 ab2f42e7 2019-11-10 stsp goto done;
1429 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1430 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1431 ab2f42e7 2019-11-10 stsp if (err == NULL)
1432 ab2f42e7 2019-11-10 stsp cached = 1;
1433 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1434 ab2f42e7 2019-11-10 stsp free(delta_buf);
1435 ab2f42e7 2019-11-10 stsp goto done;
1439 210941d5 2022-05-31 thomas err = got_delta_get_sizes(&base_size, &result_size,
1440 210941d5 2022-05-31 thomas delta_buf, delta_len);
1441 210941d5 2022-05-31 thomas if (err)
1442 210941d5 2022-05-31 thomas goto done;
1443 210941d5 2022-05-31 thomas if (base_size > max_size)
1444 210941d5 2022-05-31 thomas max_size = base_size;
1445 210941d5 2022-05-31 thomas if (result_size > max_size)
1446 210941d5 2022-05-31 thomas max_size = result_size;
1448 210941d5 2022-05-31 thomas if (base_buf && max_size > max_bufsize) {
1449 210941d5 2022-05-31 thomas /* Switch from buffers to temporary files. */
1450 210941d5 2022-05-31 thomas size_t w = fwrite(base_buf, 1, base_bufsz,
1451 210941d5 2022-05-31 thomas base_file);
1452 210941d5 2022-05-31 thomas if (w != base_bufsz) {
1453 210941d5 2022-05-31 thomas err = got_ferror(outfile, GOT_ERR_IO);
1454 210941d5 2022-05-31 thomas goto done;
1456 210941d5 2022-05-31 thomas free(base_buf);
1457 210941d5 2022-05-31 thomas base_buf = NULL;
1458 210941d5 2022-05-31 thomas free(accum_buf);
1459 210941d5 2022-05-31 thomas accum_buf = NULL;
1462 210941d5 2022-05-31 thomas if (base_buf && max_size > base_bufsz) {
1463 210941d5 2022-05-31 thomas uint8_t *p = realloc(base_buf, max_size);
1464 210941d5 2022-05-31 thomas if (p == NULL) {
1465 210941d5 2022-05-31 thomas err = got_error_from_errno("realloc");
1466 210941d5 2022-05-31 thomas goto done;
1468 210941d5 2022-05-31 thomas base_buf = p;
1469 210941d5 2022-05-31 thomas base_bufsz = max_size;
1472 210941d5 2022-05-31 thomas if (accum_buf && max_size > accum_bufsz) {
1473 210941d5 2022-05-31 thomas uint8_t *p = realloc(accum_buf, max_size);
1474 210941d5 2022-05-31 thomas if (p == NULL) {
1475 210941d5 2022-05-31 thomas err = got_error_from_errno("realloc");
1476 210941d5 2022-05-31 thomas goto done;
1478 210941d5 2022-05-31 thomas accum_buf = p;
1479 210941d5 2022-05-31 thomas accum_bufsz = max_size;
1482 8628c62d 2018-03-15 stsp if (base_buf) {
1483 34fca9c3 2018-11-11 stsp err = got_delta_apply_in_mem(base_buf, base_bufsz,
1484 42c69117 2019-11-10 stsp delta_buf, delta_len, accum_buf,
1485 34fca9c3 2018-11-11 stsp &accum_size, max_size);
1488 42c69117 2019-11-10 stsp err = got_delta_apply(base_file, delta_buf,
1489 42c69117 2019-11-10 stsp delta_len,
1490 8628c62d 2018-03-15 stsp /* Final delta application writes to output file. */
1491 b29656e2 2018-03-16 stsp ++n < deltas->nentries ? accum_file : outfile,
1492 b29656e2 2018-03-16 stsp &accum_size);
1494 ab2f42e7 2019-11-10 stsp if (!cached)
1495 ab2f42e7 2019-11-10 stsp free(delta_buf);
1497 6691714a 2018-01-23 stsp goto done;
1499 710bb5ca 2018-01-23 stsp if (n < deltas->nentries) {
1500 6691714a 2018-01-23 stsp /* Accumulated delta becomes the new base. */
1501 8628c62d 2018-03-15 stsp if (base_buf) {
1502 8628c62d 2018-03-15 stsp uint8_t *tmp = accum_buf;
1503 210941d5 2022-05-31 thomas size_t tmp_size = accum_bufsz;
1504 8628c62d 2018-03-15 stsp accum_buf = base_buf;
1505 210941d5 2022-05-31 thomas accum_bufsz = base_bufsz;
1506 8628c62d 2018-03-15 stsp base_buf = tmp;
1507 210941d5 2022-05-31 thomas base_bufsz = tmp_size;
1509 8628c62d 2018-03-15 stsp FILE *tmp = accum_file;
1510 8628c62d 2018-03-15 stsp accum_file = base_file;
1511 8628c62d 2018-03-15 stsp base_file = tmp;
1512 8628c62d 2018-03-15 stsp rewind(base_file);
1513 8628c62d 2018-03-15 stsp rewind(accum_file);
1519 8628c62d 2018-03-15 stsp free(base_buf);
1520 8628c62d 2018-03-15 stsp if (accum_buf) {
1521 8628c62d 2018-03-15 stsp size_t len = fwrite(accum_buf, 1, accum_size, outfile);
1522 8628c62d 2018-03-15 stsp free(accum_buf);
1523 8628c62d 2018-03-15 stsp if (len != accum_size)
1524 673702af 2018-07-23 stsp err = got_ferror(outfile, GOT_ERR_IO);
1526 6691714a 2018-01-23 stsp rewind(outfile);
1527 b29656e2 2018-03-16 stsp if (err == NULL)
1528 b29656e2 2018-03-16 stsp *result_size = accum_size;
1529 e0ab43e7 2018-03-16 stsp return err;
1532 668a20f6 2020-03-18 stsp const struct got_error *
1533 668a20f6 2020-03-18 stsp got_pack_dump_delta_chain_to_mem(uint8_t **outbuf, size_t *outlen,
1534 48095039 2018-09-09 stsp struct got_delta_chain *deltas, struct got_pack *pack)
1536 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1537 e0ab43e7 2018-03-16 stsp struct got_delta *delta;
1538 42c69117 2019-11-10 stsp uint8_t *base_buf = NULL, *accum_buf = NULL, *delta_buf;
1539 6c85883b 2022-05-31 thomas size_t base_bufsz = 0, accum_bufsz = 0, accum_size = 0, delta_len;
1540 6c85883b 2022-05-31 thomas uint64_t max_size = 0;
1541 e0ab43e7 2018-03-16 stsp int n = 0;
1543 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1544 e0ab43e7 2018-03-16 stsp *outlen = 0;
1546 dbdddfee 2021-06-23 naddy if (STAILQ_EMPTY(&deltas->entries))
1547 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
1549 e0ab43e7 2018-03-16 stsp /* Deltas are ordered in ascending order. */
1550 dbdddfee 2021-06-23 naddy STAILQ_FOREACH(delta, &deltas->entries, entry) {
1551 6c85883b 2022-05-31 thomas uint64_t base_size, result_size = 0;
1552 ab2f42e7 2019-11-10 stsp int cached = 1;
1553 e0ab43e7 2018-03-16 stsp if (n == 0) {
1554 0c048b15 2018-04-27 stsp size_t delta_data_offset;
1556 e0ab43e7 2018-03-16 stsp /* Plain object types are the delta base. */
1557 e0ab43e7 2018-03-16 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1558 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1559 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1560 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1561 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1562 72eb3431 2018-04-01 stsp goto done;
1565 0c048b15 2018-04-27 stsp delta_data_offset = delta->offset + delta->tslen;
1566 0c048b15 2018-04-27 stsp if (delta_data_offset >= pack->filesize) {
1567 0c048b15 2018-04-27 stsp err = got_error(GOT_ERR_PACK_OFFSET);
1568 0c048b15 2018-04-27 stsp goto done;
1571 6c85883b 2022-05-31 thomas if (delta->size > max_size)
1572 6c85883b 2022-05-31 thomas max_size = delta->size;
1574 d7464085 2018-07-09 stsp if (pack->map) {
1575 d7464085 2018-07-09 stsp size_t mapoff = (size_t)delta_data_offset;
1576 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&base_buf,
1577 2e5a6fad 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->map,
1578 2e5a6fad 2020-03-18 stsp mapoff, pack->filesize - mapoff);
1580 d7464085 2018-07-09 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET)
1582 638f9024 2019-05-13 stsp err = got_error_from_errno("lseek");
1583 d7464085 2018-07-09 stsp goto done;
1585 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&base_buf,
1586 55fdd257 2020-03-18 stsp &base_bufsz, NULL, NULL, max_size,
1587 55fdd257 2020-03-18 stsp pack->fd);
1590 d7464085 2018-07-09 stsp goto done;
1595 ab2f42e7 2019-11-10 stsp got_delta_cache_get(&delta_buf, &delta_len,
1596 ab2f42e7 2019-11-10 stsp pack->delta_cache, delta->data_offset);
1597 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1598 ab2f42e7 2019-11-10 stsp cached = 0;
1599 9249e7e3 2022-05-12 thomas err = read_delta_data(&delta_buf, &delta_len, NULL,
1600 ab2f42e7 2019-11-10 stsp delta->data_offset, pack);
1602 ab2f42e7 2019-11-10 stsp goto done;
1603 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1604 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1605 ab2f42e7 2019-11-10 stsp if (err == NULL)
1606 ab2f42e7 2019-11-10 stsp cached = 1;
1607 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1608 ab2f42e7 2019-11-10 stsp free(delta_buf);
1609 ab2f42e7 2019-11-10 stsp goto done;
1613 6c85883b 2022-05-31 thomas err = got_delta_get_sizes(&base_size, &result_size,
1614 6c85883b 2022-05-31 thomas delta_buf, delta_len);
1615 6c85883b 2022-05-31 thomas if (err)
1616 6c85883b 2022-05-31 thomas goto done;
1617 6c85883b 2022-05-31 thomas if (base_size > max_size)
1618 6c85883b 2022-05-31 thomas max_size = base_size;
1619 6c85883b 2022-05-31 thomas if (result_size > max_size)
1620 6c85883b 2022-05-31 thomas max_size = result_size;
1622 6c85883b 2022-05-31 thomas if (max_size > base_bufsz) {
1623 6c85883b 2022-05-31 thomas uint8_t *p = realloc(base_buf, max_size);
1624 6c85883b 2022-05-31 thomas if (p == NULL) {
1625 6c85883b 2022-05-31 thomas err = got_error_from_errno("realloc");
1626 6c85883b 2022-05-31 thomas goto done;
1628 6c85883b 2022-05-31 thomas base_buf = p;
1629 6c85883b 2022-05-31 thomas base_bufsz = max_size;
1632 6c85883b 2022-05-31 thomas if (max_size > accum_bufsz) {
1633 6c85883b 2022-05-31 thomas uint8_t *p = realloc(accum_buf, max_size);
1634 6c85883b 2022-05-31 thomas if (p == NULL) {
1635 6c85883b 2022-05-31 thomas err = got_error_from_errno("realloc");
1636 6c85883b 2022-05-31 thomas goto done;
1638 6c85883b 2022-05-31 thomas accum_buf = p;
1639 6c85883b 2022-05-31 thomas accum_bufsz = max_size;
1642 34fca9c3 2018-11-11 stsp err = got_delta_apply_in_mem(base_buf, base_bufsz,
1643 42c69117 2019-11-10 stsp delta_buf, delta_len, accum_buf,
1644 34fca9c3 2018-11-11 stsp &accum_size, max_size);
1645 ab2f42e7 2019-11-10 stsp if (!cached)
1646 ab2f42e7 2019-11-10 stsp free(delta_buf);
1649 e0ab43e7 2018-03-16 stsp goto done;
1651 e0ab43e7 2018-03-16 stsp if (n < deltas->nentries) {
1652 e0ab43e7 2018-03-16 stsp /* Accumulated delta becomes the new base. */
1653 e0ab43e7 2018-03-16 stsp uint8_t *tmp = accum_buf;
1654 6c85883b 2022-05-31 thomas size_t tmp_size = accum_bufsz;
1655 e0ab43e7 2018-03-16 stsp accum_buf = base_buf;
1656 6c85883b 2022-05-31 thomas accum_bufsz = base_bufsz;
1657 e0ab43e7 2018-03-16 stsp base_buf = tmp;
1658 6c85883b 2022-05-31 thomas base_bufsz = tmp_size;
1663 e0ab43e7 2018-03-16 stsp free(base_buf);
1664 e0ab43e7 2018-03-16 stsp if (err) {
1665 e0ab43e7 2018-03-16 stsp free(accum_buf);
1666 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1667 e0ab43e7 2018-03-16 stsp *outlen = 0;
1669 e0ab43e7 2018-03-16 stsp *outbuf = accum_buf;
1670 e0ab43e7 2018-03-16 stsp *outlen = accum_size;
1672 efd2a263 2018-01-19 stsp return err;
1675 3ee5fc21 2018-01-17 stsp const struct got_error *
1676 24140570 2018-09-09 stsp got_packfile_extract_object(struct got_pack *pack, struct got_object *obj,
1677 3840f4c9 2018-09-12 stsp FILE *outfile, FILE *base_file, FILE *accum_file)
1679 3ee5fc21 2018-01-17 stsp const struct got_error *err = NULL;
1681 3ee5fc21 2018-01-17 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1682 3ee5fc21 2018-01-17 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1684 ef2bccd9 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1685 24140570 2018-09-09 stsp if (obj->pack_offset >= pack->filesize)
1686 24140570 2018-09-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1688 d7464085 2018-07-09 stsp if (pack->map) {
1689 d7464085 2018-07-09 stsp size_t mapoff = (size_t)obj->pack_offset;
1690 4788f1ce 2020-03-18 stsp err = got_inflate_to_file_mmap(&obj->size, NULL, NULL,
1691 4788f1ce 2020-03-18 stsp pack->map, mapoff, pack->filesize - mapoff,
1694 24140570 2018-09-09 stsp if (lseek(pack->fd, obj->pack_offset, SEEK_SET) == -1)
1695 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
1696 4788f1ce 2020-03-18 stsp err = got_inflate_to_file_fd(&obj->size, NULL, NULL,
1697 4788f1ce 2020-03-18 stsp pack->fd, outfile);
1700 4788f1ce 2020-03-18 stsp err = got_pack_dump_delta_chain_to_file(&obj->size,
1701 4788f1ce 2020-03-18 stsp &obj->deltas, pack, outfile, base_file, accum_file);
1703 a1fd68d8 2018-01-12 stsp return err;
1706 e0ab43e7 2018-03-16 stsp const struct got_error *
1707 e0ab43e7 2018-03-16 stsp got_packfile_extract_object_to_mem(uint8_t **buf, size_t *len,
1708 7e212e3d 2018-09-09 stsp struct got_object *obj, struct got_pack *pack)
1710 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1712 e0ab43e7 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1713 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1715 48095039 2018-09-09 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1716 7e212e3d 2018-09-09 stsp if (obj->pack_offset >= pack->filesize)
1717 7e212e3d 2018-09-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1718 d7464085 2018-07-09 stsp if (pack->map) {
1719 d7464085 2018-07-09 stsp size_t mapoff = (size_t)obj->pack_offset;
1720 2e5a6fad 2020-03-18 stsp err = got_inflate_to_mem_mmap(buf, len, NULL, NULL,
1721 2e5a6fad 2020-03-18 stsp pack->map, mapoff, pack->filesize - mapoff);
1723 7e212e3d 2018-09-09 stsp if (lseek(pack->fd, obj->pack_offset, SEEK_SET) == -1)
1724 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
1725 1e87a3c3 2020-03-18 stsp err = got_inflate_to_mem_fd(buf, len, NULL, NULL,
1726 55fdd257 2020-03-18 stsp obj->size, pack->fd);
1729 668a20f6 2020-03-18 stsp err = got_pack_dump_delta_chain_to_mem(buf, len, &obj->deltas,
1732 e0ab43e7 2018-03-16 stsp return err;
1735 9249e7e3 2022-05-12 thomas static const struct got_error *
1736 9249e7e3 2022-05-12 thomas read_raw_delta_data(uint8_t **delta_buf, size_t *delta_len,
1737 9249e7e3 2022-05-12 thomas size_t *delta_len_compressed, uint64_t *base_size, uint64_t *result_size,
1738 9249e7e3 2022-05-12 thomas off_t delta_data_offset, struct got_pack *pack, struct got_packidx *packidx)
1740 9249e7e3 2022-05-12 thomas const struct got_error *err = NULL;
1742 9249e7e3 2022-05-12 thomas /* Validate decompression and obtain the decompressed size. */
1743 9249e7e3 2022-05-12 thomas err = read_delta_data(delta_buf, delta_len, delta_len_compressed,
1744 9249e7e3 2022-05-12 thomas delta_data_offset, pack);
1745 9249e7e3 2022-05-12 thomas if (err)
1746 9249e7e3 2022-05-12 thomas return err;
1748 9249e7e3 2022-05-12 thomas /* Read delta base/result sizes from head of delta stream. */
1749 9249e7e3 2022-05-12 thomas err = got_delta_get_sizes(base_size, result_size,
1750 9249e7e3 2022-05-12 thomas *delta_buf, *delta_len);
1751 9249e7e3 2022-05-12 thomas if (err)
1752 9249e7e3 2022-05-12 thomas goto done;
1754 9249e7e3 2022-05-12 thomas /* Discard decompressed delta and read it again in compressed form. */
1755 9249e7e3 2022-05-12 thomas free(*delta_buf);
1756 9249e7e3 2022-05-12 thomas *delta_buf = malloc(*delta_len_compressed);
1757 9249e7e3 2022-05-12 thomas if (*delta_buf == NULL) {
1758 9249e7e3 2022-05-12 thomas err = got_error_from_errno("malloc");
1759 9249e7e3 2022-05-12 thomas goto done;
1761 9249e7e3 2022-05-12 thomas if (pack->map) {
1762 9249e7e3 2022-05-12 thomas if (delta_data_offset >= pack->filesize)
1763 9249e7e3 2022-05-12 thomas err = got_error(GOT_ERR_PACK_OFFSET);
1764 9249e7e3 2022-05-12 thomas memcpy(*delta_buf, pack->map + delta_data_offset,
1765 9249e7e3 2022-05-12 thomas *delta_len_compressed);
1766 9249e7e3 2022-05-12 thomas } else {
1767 9249e7e3 2022-05-12 thomas ssize_t n;
1768 9249e7e3 2022-05-12 thomas if (lseek(pack->fd, delta_data_offset, SEEK_SET) == -1) {
1769 9249e7e3 2022-05-12 thomas err = got_error_from_errno("lseek");
1770 9249e7e3 2022-05-12 thomas goto done;
1772 9249e7e3 2022-05-12 thomas n = read(pack->fd, *delta_buf, *delta_len_compressed);
1773 9249e7e3 2022-05-12 thomas if (n < 0) {
1774 9249e7e3 2022-05-12 thomas err = got_error_from_errno("read");
1775 9249e7e3 2022-05-12 thomas goto done;
1776 9249e7e3 2022-05-12 thomas } else if (n != *delta_len_compressed) {
1777 9249e7e3 2022-05-12 thomas err = got_error(GOT_ERR_IO);
1778 9249e7e3 2022-05-12 thomas goto done;
1782 9249e7e3 2022-05-12 thomas if (err) {
1783 9249e7e3 2022-05-12 thomas free(*delta_buf);
1784 9249e7e3 2022-05-12 thomas *delta_buf = NULL;
1785 9249e7e3 2022-05-12 thomas *delta_len = 0;
1786 9249e7e3 2022-05-12 thomas *delta_len_compressed = 0;
1787 9249e7e3 2022-05-12 thomas *base_size = 0;
1788 9249e7e3 2022-05-12 thomas *result_size = 0;
1790 9249e7e3 2022-05-12 thomas return err;
1793 f9c2e8e5 2022-02-13 thomas const struct got_error *
1794 f9c2e8e5 2022-02-13 thomas got_packfile_extract_raw_delta(uint8_t **delta_buf, size_t *delta_size,
1795 9249e7e3 2022-05-12 thomas size_t *delta_compressed_size, off_t *delta_offset, off_t *base_offset,
1796 9249e7e3 2022-05-12 thomas struct got_object_id *base_id, uint64_t *base_size, uint64_t *result_size,
1797 9249e7e3 2022-05-12 thomas struct got_pack *pack, struct got_packidx *packidx, int idx)
1799 f9c2e8e5 2022-02-13 thomas const struct got_error *err = NULL;
1800 f9c2e8e5 2022-02-13 thomas off_t offset;
1801 f9c2e8e5 2022-02-13 thomas uint8_t type;
1802 f9c2e8e5 2022-02-13 thomas uint64_t size;
1803 f9c2e8e5 2022-02-13 thomas size_t tslen, delta_hdrlen;
1804 9249e7e3 2022-05-12 thomas off_t delta_data_offset;
1806 f9c2e8e5 2022-02-13 thomas *delta_buf = NULL;
1807 f9c2e8e5 2022-02-13 thomas *delta_size = 0;
1808 9249e7e3 2022-05-12 thomas *delta_compressed_size = 0;
1809 f9c2e8e5 2022-02-13 thomas *delta_offset = 0;
1810 f9c2e8e5 2022-02-13 thomas *base_offset = 0;
1811 f9c2e8e5 2022-02-13 thomas *base_size = 0;
1812 f9c2e8e5 2022-02-13 thomas *result_size = 0;
1814 f9c2e8e5 2022-02-13 thomas offset = got_packidx_get_object_offset(packidx, idx);
1815 f9c2e8e5 2022-02-13 thomas if (offset == (uint64_t)-1)
1816 f9c2e8e5 2022-02-13 thomas return got_error(GOT_ERR_BAD_PACKIDX);
1818 f9c2e8e5 2022-02-13 thomas if (offset >= pack->filesize)
1819 f9c2e8e5 2022-02-13 thomas return got_error(GOT_ERR_PACK_OFFSET);
1821 f9c2e8e5 2022-02-13 thomas err = got_pack_parse_object_type_and_size(&type, &size, &tslen,
1822 f9c2e8e5 2022-02-13 thomas pack, offset);
1823 f9c2e8e5 2022-02-13 thomas if (err)
1824 f9c2e8e5 2022-02-13 thomas return err;
1826 f9c2e8e5 2022-02-13 thomas if (tslen + size < tslen || offset + size < size ||
1827 f9c2e8e5 2022-02-13 thomas tslen + offset < tslen)
1828 f9c2e8e5 2022-02-13 thomas return got_error(GOT_ERR_PACK_OFFSET);
1830 f9c2e8e5 2022-02-13 thomas switch (type) {
1831 f9c2e8e5 2022-02-13 thomas case GOT_OBJ_TYPE_OFFSET_DELTA:
1832 f9c2e8e5 2022-02-13 thomas err = got_pack_parse_offset_delta(base_offset, &delta_hdrlen,
1833 f9c2e8e5 2022-02-13 thomas pack, offset, tslen);
1834 f9c2e8e5 2022-02-13 thomas if (err)
1835 f9c2e8e5 2022-02-13 thomas return err;
1837 f9c2e8e5 2022-02-13 thomas case GOT_OBJ_TYPE_REF_DELTA:
1838 f9c2e8e5 2022-02-13 thomas err = got_pack_parse_ref_delta(base_id, pack, offset, tslen);
1839 f9c2e8e5 2022-02-13 thomas if (err)
1840 f9c2e8e5 2022-02-13 thomas return err;
1841 f9c2e8e5 2022-02-13 thomas delta_hdrlen = SHA1_DIGEST_LENGTH;
1843 f9c2e8e5 2022-02-13 thomas default:
1844 f9c2e8e5 2022-02-13 thomas return got_error_fmt(GOT_ERR_OBJ_TYPE,
1845 f9c2e8e5 2022-02-13 thomas "non-delta object type %d found at offset %llu",
1846 f9c2e8e5 2022-02-13 thomas type, offset);
1849 f9c2e8e5 2022-02-13 thomas if (tslen + delta_hdrlen < delta_hdrlen ||
1850 f9c2e8e5 2022-02-13 thomas offset + delta_hdrlen < delta_hdrlen)
1851 f9c2e8e5 2022-02-13 thomas return got_error(GOT_ERR_BAD_DELTA);
1853 9249e7e3 2022-05-12 thomas delta_data_offset = offset + tslen + delta_hdrlen;
1854 9249e7e3 2022-05-12 thomas err = read_raw_delta_data(delta_buf, delta_size, delta_compressed_size,
1855 9249e7e3 2022-05-12 thomas base_size, result_size, delta_data_offset, pack, packidx);
1856 f9c2e8e5 2022-02-13 thomas if (err)
1857 f9c2e8e5 2022-02-13 thomas return err;
1859 f9c2e8e5 2022-02-13 thomas if (*delta_size != size) {
1860 f9c2e8e5 2022-02-13 thomas err = got_error(GOT_ERR_BAD_DELTA);
1861 f9c2e8e5 2022-02-13 thomas goto done;
1864 f9c2e8e5 2022-02-13 thomas *delta_offset = offset;
1866 f9c2e8e5 2022-02-13 thomas if (err) {
1867 f9c2e8e5 2022-02-13 thomas free(*delta_buf);
1868 f9c2e8e5 2022-02-13 thomas *delta_buf = NULL;
1869 9249e7e3 2022-05-12 thomas *delta_size = 0;
1870 9249e7e3 2022-05-12 thomas *delta_compressed_size = 0;
1871 9249e7e3 2022-05-12 thomas *delta_offset = 0;
1872 9249e7e3 2022-05-12 thomas *base_offset = 0;
1873 9249e7e3 2022-05-12 thomas *base_size = 0;
1874 9249e7e3 2022-05-12 thomas *result_size = 0;
1876 f9c2e8e5 2022-02-13 thomas return err;
