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>
22 3d589bee 2022-06-25 stsp #include <sys/resource.h>
23 3d589bee 2022-06-25 stsp #include <sys/socket.h>
25 7e656b93 2018-03-17 stsp #include <fcntl.h>
26 a1fd68d8 2018-01-12 stsp #include <errno.h>
27 0a0a3048 2018-01-10 stsp #include <stdio.h>
28 a1fd68d8 2018-01-12 stsp #include <stdint.h>
29 0a0a3048 2018-01-10 stsp #include <stdlib.h>
30 0a0a3048 2018-01-10 stsp #include <string.h>
31 0a0a3048 2018-01-10 stsp #include <limits.h>
32 0a0a3048 2018-01-10 stsp #include <sha1.h>
33 0a0a3048 2018-01-10 stsp #include <endian.h>
34 81a12da5 2020-09-09 naddy #include <unistd.h>
35 a1fd68d8 2018-01-12 stsp #include <zlib.h>
36 876c234b 2018-09-10 stsp #include <imsg.h>
38 0a0a3048 2018-01-10 stsp #include "got_error.h"
39 a1fd68d8 2018-01-12 stsp #include "got_object.h"
40 324d37e7 2019-05-11 stsp #include "got_path.h"
42 718b3ab0 2018-03-17 stsp #include "got_lib_sha1.h"
43 718b3ab0 2018-03-17 stsp #include "got_lib_delta.h"
44 ab2f42e7 2019-11-10 stsp #include "got_lib_delta_cache.h"
45 63581804 2018-07-09 stsp #include "got_lib_inflate.h"
46 718b3ab0 2018-03-17 stsp #include "got_lib_object.h"
47 dd88155e 2019-06-29 stsp #include "got_lib_object_parse.h"
48 876c234b 2018-09-10 stsp #include "got_lib_privsep.h"
49 15a94983 2018-12-23 stsp #include "got_lib_pack.h"
51 79b11c62 2018-03-09 stsp #ifndef nitems
52 79b11c62 2018-03-09 stsp #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
56 a1fd68d8 2018-01-12 stsp #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
59 0a0a3048 2018-01-10 stsp static const struct got_error *
60 0a0a3048 2018-01-10 stsp verify_fanout_table(uint32_t *fanout_table)
64 0a0a3048 2018-01-10 stsp for (i = 0; i < 0xff - 1; i++) {
65 a1fd68d8 2018-01-12 stsp if (be32toh(fanout_table[i]) > be32toh(fanout_table[i + 1]))
66 0a0a3048 2018-01-10 stsp return got_error(GOT_ERR_BAD_PACKIDX);
69 0a0a3048 2018-01-10 stsp return NULL;
72 1510f469 2018-09-09 stsp const struct got_error *
73 c3564dfa 2021-07-15 stsp got_packidx_init_hdr(struct got_packidx *p, int verify, off_t packfile_size)
75 0a0a3048 2018-01-10 stsp const struct got_error *err = NULL;
76 817c5a18 2018-09-09 stsp struct got_packidx_v2_hdr *h;
77 0ebaf008 2018-01-10 stsp SHA1_CTX ctx;
78 0ebaf008 2018-01-10 stsp uint8_t sha1[SHA1_DIGEST_LENGTH];
79 817c5a18 2018-09-09 stsp size_t nobj, len_fanout, len_ids, offset, remain;
83 0ebaf008 2018-01-10 stsp SHA1Init(&ctx);
85 57b35b75 2018-06-22 stsp h = &p->hdr;
87 57b35b75 2018-06-22 stsp remain = p->len;
89 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->magic)) {
90 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
94 fc79a48d 2018-07-09 stsp h->magic = (uint32_t *)(p->map + offset);
96 fc79a48d 2018-07-09 stsp h->magic = malloc(sizeof(*h->magic));
97 fc79a48d 2018-07-09 stsp if (h->magic == NULL) {
98 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
101 fc79a48d 2018-07-09 stsp n = read(p->fd, h->magic, sizeof(*h->magic));
102 b1317e77 2019-09-22 stsp if (n < 0) {
103 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
105 b1317e77 2019-09-22 stsp } else if (n != sizeof(*h->magic)) {
106 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
110 ac62b712 2021-03-30 stsp if (*h->magic != htobe32(GOT_PACKIDX_V2_MAGIC)) {
111 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
114 57b35b75 2018-06-22 stsp offset += sizeof(*h->magic);
115 57b35b75 2018-06-22 stsp remain -= sizeof(*h->magic);
117 0cb74cf4 2018-07-08 stsp if (verify)
118 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->magic, sizeof(*h->magic));
120 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->version)) {
121 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
124 fc79a48d 2018-07-09 stsp if (p->map)
125 fc79a48d 2018-07-09 stsp h->version = (uint32_t *)(p->map + offset);
127 fc79a48d 2018-07-09 stsp h->version = malloc(sizeof(*h->version));
128 fc79a48d 2018-07-09 stsp if (h->version == NULL) {
129 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
132 fc79a48d 2018-07-09 stsp n = read(p->fd, h->version, sizeof(*h->version));
133 c6368c2e 2019-10-11 stsp if (n < 0) {
134 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
136 c6368c2e 2019-10-11 stsp } else if (n != sizeof(*h->version)) {
137 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
141 ac62b712 2021-03-30 stsp if (*h->version != htobe32(GOT_PACKIDX_VERSION)) {
142 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
145 57b35b75 2018-06-22 stsp offset += sizeof(*h->version);
146 57b35b75 2018-06-22 stsp remain -= sizeof(*h->version);
148 0cb74cf4 2018-07-08 stsp if (verify)
149 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->version, sizeof(*h->version));
151 57b35b75 2018-06-22 stsp len_fanout =
152 57b35b75 2018-06-22 stsp sizeof(*h->fanout_table) * GOT_PACKIDX_V2_FANOUT_TABLE_ITEMS;
153 57b35b75 2018-06-22 stsp if (remain < len_fanout) {
154 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
157 fc79a48d 2018-07-09 stsp if (p->map)
158 fc79a48d 2018-07-09 stsp h->fanout_table = (uint32_t *)(p->map + offset);
160 fc79a48d 2018-07-09 stsp h->fanout_table = malloc(len_fanout);
161 fc79a48d 2018-07-09 stsp if (h->fanout_table == NULL) {
162 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
165 fc79a48d 2018-07-09 stsp n = read(p->fd, h->fanout_table, len_fanout);
166 c6368c2e 2019-10-11 stsp if (n < 0) {
167 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
169 c6368c2e 2019-10-11 stsp } else if (n != len_fanout) {
170 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
174 c8262310 2018-06-04 stsp err = verify_fanout_table(h->fanout_table);
177 0cb74cf4 2018-07-08 stsp if (verify)
178 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->fanout_table, len_fanout);
179 57b35b75 2018-06-22 stsp offset += len_fanout;
180 57b35b75 2018-06-22 stsp remain -= len_fanout;
182 78fb0967 2020-09-09 naddy nobj = be32toh(h->fanout_table[0xff]);
183 57b35b75 2018-06-22 stsp len_ids = nobj * sizeof(*h->sorted_ids);
184 57b35b75 2018-06-22 stsp if (len_ids <= nobj || len_ids > remain) {
185 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
188 fc79a48d 2018-07-09 stsp if (p->map)
189 fc79a48d 2018-07-09 stsp h->sorted_ids =
190 fc79a48d 2018-07-09 stsp (struct got_packidx_object_id *)((uint8_t*)(p->map + offset));
192 fc79a48d 2018-07-09 stsp h->sorted_ids = malloc(len_ids);
193 fc79a48d 2018-07-09 stsp if (h->sorted_ids == NULL) {
194 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
197 fc79a48d 2018-07-09 stsp n = read(p->fd, h->sorted_ids, len_ids);
199 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
200 faaa1c0f 2018-09-15 stsp else if (n != len_ids) {
201 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
205 0cb74cf4 2018-07-08 stsp if (verify)
206 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->sorted_ids, len_ids);
207 57b35b75 2018-06-22 stsp offset += len_ids;
208 57b35b75 2018-06-22 stsp remain -= len_ids;
210 57b35b75 2018-06-22 stsp if (remain < nobj * sizeof(*h->crc32)) {
211 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
214 fc79a48d 2018-07-09 stsp if (p->map)
215 fc79a48d 2018-07-09 stsp h->crc32 = (uint32_t *)((uint8_t*)(p->map + offset));
217 fc79a48d 2018-07-09 stsp h->crc32 = malloc(nobj * sizeof(*h->crc32));
218 fc79a48d 2018-07-09 stsp if (h->crc32 == NULL) {
219 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
222 fc79a48d 2018-07-09 stsp n = read(p->fd, h->crc32, nobj * sizeof(*h->crc32));
224 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
225 faaa1c0f 2018-09-15 stsp else if (n != nobj * sizeof(*h->crc32)) {
226 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
230 0cb74cf4 2018-07-08 stsp if (verify)
231 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->crc32, nobj * sizeof(*h->crc32));
232 57b35b75 2018-06-22 stsp remain -= nobj * sizeof(*h->crc32);
233 57b35b75 2018-06-22 stsp offset += nobj * sizeof(*h->crc32);
235 57b35b75 2018-06-22 stsp if (remain < nobj * sizeof(*h->offsets)) {
236 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
239 fc79a48d 2018-07-09 stsp if (p->map)
240 fc79a48d 2018-07-09 stsp h->offsets = (uint32_t *)((uint8_t*)(p->map + offset));
242 fc79a48d 2018-07-09 stsp h->offsets = malloc(nobj * sizeof(*h->offsets));
243 fc79a48d 2018-07-09 stsp if (h->offsets == NULL) {
244 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
247 fc79a48d 2018-07-09 stsp n = read(p->fd, h->offsets, nobj * sizeof(*h->offsets));
249 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
250 faaa1c0f 2018-09-15 stsp else if (n != nobj * sizeof(*h->offsets)) {
251 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
255 0cb74cf4 2018-07-08 stsp if (verify)
256 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->offsets,
257 0cb74cf4 2018-07-08 stsp nobj * sizeof(*h->offsets));
258 57b35b75 2018-06-22 stsp remain -= nobj * sizeof(*h->offsets);
259 57b35b75 2018-06-22 stsp offset += nobj * sizeof(*h->offsets);
261 0a0a3048 2018-01-10 stsp /* Large file offsets are contained only in files > 2GB. */
262 c3564dfa 2021-07-15 stsp if (verify || packfile_size > 0x7fffffff) {
263 c3564dfa 2021-07-15 stsp for (i = 0; i < nobj; i++) {
264 c3564dfa 2021-07-15 stsp uint32_t o = h->offsets[i];
265 c3564dfa 2021-07-15 stsp if (o & htobe32(GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX))
266 c3564dfa 2021-07-15 stsp p->nlargeobj++;
269 5e6be232 2019-11-08 stsp if (p->nlargeobj == 0)
270 0a0a3048 2018-01-10 stsp goto checksum;
271 c3564dfa 2021-07-15 stsp else if (packfile_size <= 0x7fffffff) {
272 c3564dfa 2021-07-15 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
276 5e6be232 2019-11-08 stsp if (remain < p->nlargeobj * sizeof(*h->large_offsets)) {
277 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
280 fc79a48d 2018-07-09 stsp if (p->map)
281 fc79a48d 2018-07-09 stsp h->large_offsets = (uint64_t *)((uint8_t*)(p->map + offset));
283 5e6be232 2019-11-08 stsp h->large_offsets = malloc(p->nlargeobj *
284 5e6be232 2019-11-08 stsp sizeof(*h->large_offsets));
285 de30857e 2019-08-23 stsp if (h->large_offsets == NULL) {
286 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
289 fc79a48d 2018-07-09 stsp n = read(p->fd, h->large_offsets,
290 5e6be232 2019-11-08 stsp p->nlargeobj * sizeof(*h->large_offsets));
292 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
293 5e6be232 2019-11-08 stsp else if (n != p->nlargeobj * sizeof(*h->large_offsets)) {
294 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
298 0cb74cf4 2018-07-08 stsp if (verify)
299 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t*)h->large_offsets,
300 5e6be232 2019-11-08 stsp p->nlargeobj * sizeof(*h->large_offsets));
301 5e6be232 2019-11-08 stsp remain -= p->nlargeobj * sizeof(*h->large_offsets);
302 5e6be232 2019-11-08 stsp offset += p->nlargeobj * sizeof(*h->large_offsets);
305 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->trailer)) {
306 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
309 fc79a48d 2018-07-09 stsp if (p->map)
310 fc79a48d 2018-07-09 stsp h->trailer =
311 fc79a48d 2018-07-09 stsp (struct got_packidx_trailer *)((uint8_t*)(p->map + offset));
313 fc79a48d 2018-07-09 stsp h->trailer = malloc(sizeof(*h->trailer));
314 fc79a48d 2018-07-09 stsp if (h->trailer == NULL) {
315 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
318 fc79a48d 2018-07-09 stsp n = read(p->fd, h->trailer, sizeof(*h->trailer));
320 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
321 faaa1c0f 2018-09-15 stsp else if (n != sizeof(*h->trailer)) {
322 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
326 0cb74cf4 2018-07-08 stsp if (verify) {
327 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, h->trailer->packfile_sha1, SHA1_DIGEST_LENGTH);
328 0cb74cf4 2018-07-08 stsp SHA1Final(sha1, &ctx);
329 0cb74cf4 2018-07-08 stsp if (memcmp(h->trailer->packidx_sha1, sha1,
330 0cb74cf4 2018-07-08 stsp SHA1_DIGEST_LENGTH) != 0)
331 0cb74cf4 2018-07-08 stsp err = got_error(GOT_ERR_PACKIDX_CSUM);
334 817c5a18 2018-09-09 stsp return err;
337 817c5a18 2018-09-09 stsp const struct got_error *
338 6d5a9006 2020-12-16 yzhong got_packidx_open(struct got_packidx **packidx,
339 6d5a9006 2020-12-16 yzhong int dir_fd, const char *relpath, int verify)
341 817c5a18 2018-09-09 stsp const struct got_error *err = NULL;
342 1124fe40 2021-07-07 stsp struct got_packidx *p = NULL;
343 1124fe40 2021-07-07 stsp char *pack_relpath;
344 c3564dfa 2021-07-15 stsp struct stat idx_sb, pack_sb;
346 817c5a18 2018-09-09 stsp *packidx = NULL;
348 1124fe40 2021-07-07 stsp err = got_packidx_get_packfile_path(&pack_relpath, relpath);
350 1124fe40 2021-07-07 stsp return err;
353 1124fe40 2021-07-07 stsp * Ensure that a corresponding pack file exists.
354 1124fe40 2021-07-07 stsp * Some Git repositories have this problem. Git seems to ignore
355 1124fe40 2021-07-07 stsp * the existence of lonely pack index files but we do not.
357 c3564dfa 2021-07-15 stsp if (fstatat(dir_fd, pack_relpath, &pack_sb, 0) == -1) {
358 1124fe40 2021-07-07 stsp if (errno == ENOENT) {
359 1124fe40 2021-07-07 stsp err = got_error_fmt(GOT_ERR_LONELY_PACKIDX,
360 1124fe40 2021-07-07 stsp "%s", relpath);
362 1124fe40 2021-07-07 stsp err = got_error_from_errno2("fstatat", pack_relpath);
366 817c5a18 2018-09-09 stsp p = calloc(1, sizeof(*p));
367 1124fe40 2021-07-07 stsp if (p == NULL) {
368 1124fe40 2021-07-07 stsp err = got_error_from_errno("calloc");
372 e7ae0baf 2021-12-31 stsp p->fd = openat(dir_fd, relpath, O_RDONLY | O_NOFOLLOW | O_CLOEXEC);
373 6772cf22 2019-08-28 hiltjo if (p->fd == -1) {
374 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);
382 c3564dfa 2021-07-15 stsp p->len = idx_sb.st_size;
383 817c5a18 2018-09-09 stsp if (p->len < sizeof(p->hdr)) {
384 817c5a18 2018-09-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
388 6d5a9006 2020-12-16 yzhong p->path_packidx = strdup(relpath);
389 817c5a18 2018-09-09 stsp if (p->path_packidx == NULL) {
390 638f9024 2019-05-13 stsp err = got_error_from_errno("strdup");
394 817c5a18 2018-09-09 stsp #ifndef GOT_PACK_NO_MMAP
395 817c5a18 2018-09-09 stsp p->map = mmap(NULL, p->len, PROT_READ, MAP_PRIVATE, p->fd, 0);
396 3a11398b 2019-02-21 stsp if (p->map == MAP_FAILED) {
397 3a11398b 2019-02-21 stsp if (errno != ENOMEM) {
398 638f9024 2019-05-13 stsp err = got_error_from_errno("mmap");
401 817c5a18 2018-09-09 stsp p->map = NULL; /* fall back to read(2) */
405 c3564dfa 2021-07-15 stsp err = got_packidx_init_hdr(p, verify, pack_sb.st_size);
409 1124fe40 2021-07-07 stsp got_packidx_close(p);
411 0a0a3048 2018-01-10 stsp *packidx = p;
412 1124fe40 2021-07-07 stsp free(pack_relpath);
413 0a0a3048 2018-01-10 stsp return err;
416 57b35b75 2018-06-22 stsp const struct got_error *
417 6fd11751 2018-06-04 stsp got_packidx_close(struct got_packidx *packidx)
419 57b35b75 2018-06-22 stsp const struct got_error *err = NULL;
421 6fd11751 2018-06-04 stsp free(packidx->path_packidx);
422 fc79a48d 2018-07-09 stsp if (packidx->map) {
423 57b35b75 2018-06-22 stsp if (munmap(packidx->map, packidx->len) == -1)
424 638f9024 2019-05-13 stsp err = got_error_from_errno("munmap");
426 fc79a48d 2018-07-09 stsp free(packidx->hdr.magic);
427 fc79a48d 2018-07-09 stsp free(packidx->hdr.version);
428 fc79a48d 2018-07-09 stsp free(packidx->hdr.fanout_table);
429 fc79a48d 2018-07-09 stsp free(packidx->hdr.sorted_ids);
430 fc79a48d 2018-07-09 stsp free(packidx->hdr.crc32);
431 fc79a48d 2018-07-09 stsp free(packidx->hdr.offsets);
432 fc79a48d 2018-07-09 stsp free(packidx->hdr.large_offsets);
433 fc79a48d 2018-07-09 stsp free(packidx->hdr.trailer);
435 08578a35 2021-01-22 stsp if (close(packidx->fd) == -1 && err == NULL)
436 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
437 67fd6849 2022-02-13 stsp free(packidx->sorted_offsets);
438 67fd6849 2022-02-13 stsp free(packidx->sorted_large_offsets);
439 0a0a3048 2018-01-10 stsp free(packidx);
441 57b35b75 2018-06-22 stsp return err;
444 509c9973 2021-04-10 stsp const struct got_error *
445 aea75d87 2021-07-06 stsp got_packidx_get_packfile_path(char **path_packfile, const char *path_packidx)
447 509c9973 2021-04-10 stsp size_t size;
449 509c9973 2021-04-10 stsp /* Packfile path contains ".pack" instead of ".idx", so add one byte. */
450 aea75d87 2021-07-06 stsp size = strlen(path_packidx) + 2;
451 509c9973 2021-04-10 stsp if (size < GOT_PACKFILE_NAMELEN + 1)
452 aea75d87 2021-07-06 stsp return got_error_path(path_packidx, GOT_ERR_BAD_PATH);
454 509c9973 2021-04-10 stsp *path_packfile = malloc(size);
455 509c9973 2021-04-10 stsp if (*path_packfile == NULL)
456 509c9973 2021-04-10 stsp return got_error_from_errno("malloc");
458 509c9973 2021-04-10 stsp /* Copy up to and excluding ".idx". */
459 aea75d87 2021-07-06 stsp if (strlcpy(*path_packfile, path_packidx,
460 509c9973 2021-04-10 stsp size - strlen(GOT_PACKIDX_SUFFIX) - 1) >= size)
461 509c9973 2021-04-10 stsp return got_error(GOT_ERR_NO_SPACE);
463 509c9973 2021-04-10 stsp if (strlcat(*path_packfile, GOT_PACKFILE_SUFFIX, size) >= size)
464 509c9973 2021-04-10 stsp return got_error(GOT_ERR_NO_SPACE);
466 509c9973 2021-04-10 stsp return NULL;
470 02828bfd 2021-06-22 stsp got_packidx_get_object_offset(struct got_packidx *packidx, int idx)
472 78fb0967 2020-09-09 naddy uint32_t offset = be32toh(packidx->hdr.offsets[idx]);
473 a1fd68d8 2018-01-12 stsp if (offset & GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX) {
474 a1fd68d8 2018-01-12 stsp uint64_t loffset;
475 a1fd68d8 2018-01-12 stsp idx = offset & GOT_PACKIDX_OFFSET_VAL_MASK;
476 5e6be232 2019-11-08 stsp if (idx < 0 || idx >= packidx->nlargeobj ||
477 6fd11751 2018-06-04 stsp packidx->hdr.large_offsets == NULL)
479 78fb0967 2020-09-09 naddy loffset = be64toh(packidx->hdr.large_offsets[idx]);
480 a1fd68d8 2018-01-12 stsp return (loffset > INT64_MAX ? -1 : (off_t)loffset);
482 a1fd68d8 2018-01-12 stsp return (off_t)(offset & GOT_PACKIDX_OFFSET_VAL_MASK);
486 c0df5966 2021-12-31 stsp got_packidx_get_object_idx(struct got_packidx *packidx,
487 c0df5966 2021-12-31 stsp struct got_object_id *id)
489 00927983 2020-04-19 stsp u_int8_t id0 = id->sha1[0];
490 78fb0967 2020-09-09 naddy uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
491 40aeb19c 2018-06-22 stsp int left = 0, right = totobj - 1;
493 a1fd68d8 2018-01-12 stsp if (id0 > 0)
494 78fb0967 2020-09-09 naddy left = be32toh(packidx->hdr.fanout_table[id0 - 1]);
496 40aeb19c 2018-06-22 stsp while (left <= right) {
497 57b35b75 2018-06-22 stsp struct got_packidx_object_id *oid;
498 40aeb19c 2018-06-22 stsp int i, cmp;
500 40aeb19c 2018-06-22 stsp i = ((left + right) / 2);
501 40aeb19c 2018-06-22 stsp oid = &packidx->hdr.sorted_ids[i];
502 00927983 2020-04-19 stsp cmp = memcmp(id->sha1, oid->sha1, SHA1_DIGEST_LENGTH);
503 16dcbf91 2018-04-01 stsp if (cmp == 0)
505 40aeb19c 2018-06-22 stsp else if (cmp > 0)
506 40aeb19c 2018-06-22 stsp left = i + 1;
507 40aeb19c 2018-06-22 stsp else if (cmp < 0)
508 40aeb19c 2018-06-22 stsp right = i - 1;
515 67fd6849 2022-02-13 stsp offset_cmp(const void *pa, const void *pb)
517 67fd6849 2022-02-13 stsp const struct got_pack_offset_index *a, *b;
519 67fd6849 2022-02-13 stsp a = (const struct got_pack_offset_index *)pa;
520 67fd6849 2022-02-13 stsp b = (const struct got_pack_offset_index *)pb;
522 67fd6849 2022-02-13 stsp if (a->offset < b->offset)
524 67fd6849 2022-02-13 stsp else if (a->offset > b->offset)
531 67fd6849 2022-02-13 stsp large_offset_cmp(const void *pa, const void *pb)
533 67fd6849 2022-02-13 stsp const struct got_pack_large_offset_index *a, *b;
535 67fd6849 2022-02-13 stsp a = (const struct got_pack_large_offset_index *)pa;
536 67fd6849 2022-02-13 stsp b = (const struct got_pack_large_offset_index *)pb;
538 67fd6849 2022-02-13 stsp if (a->offset < b->offset)
540 67fd6849 2022-02-13 stsp else if (a->offset > b->offset)
546 67fd6849 2022-02-13 stsp static const struct got_error *
547 67fd6849 2022-02-13 stsp build_offset_index(struct got_packidx *p)
549 67fd6849 2022-02-13 stsp uint32_t nobj = be32toh(p->hdr.fanout_table[0xff]);
550 67fd6849 2022-02-13 stsp unsigned int i, j, k;
552 67fd6849 2022-02-13 stsp p->sorted_offsets = calloc(nobj - p->nlargeobj,
553 67fd6849 2022-02-13 stsp sizeof(p->sorted_offsets[0]));
554 67fd6849 2022-02-13 stsp if (p->sorted_offsets == NULL)
555 67fd6849 2022-02-13 stsp return got_error_from_errno("calloc");
557 67fd6849 2022-02-13 stsp if (p->nlargeobj > 0) {
558 67fd6849 2022-02-13 stsp p->sorted_large_offsets = calloc(p->nlargeobj,
559 67fd6849 2022-02-13 stsp sizeof(p->sorted_large_offsets[0]));
560 67fd6849 2022-02-13 stsp if (p->sorted_large_offsets == NULL)
561 67fd6849 2022-02-13 stsp return got_error_from_errno("calloc");
566 67fd6849 2022-02-13 stsp for (i = 0; i < nobj; i++) {
567 67fd6849 2022-02-13 stsp uint32_t offset = be32toh(p->hdr.offsets[i]);
568 67fd6849 2022-02-13 stsp if (offset & GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX) {
569 67fd6849 2022-02-13 stsp uint64_t loffset;
570 67fd6849 2022-02-13 stsp uint32_t idx;
571 67fd6849 2022-02-13 stsp idx = offset & GOT_PACKIDX_OFFSET_VAL_MASK;
572 67fd6849 2022-02-13 stsp if (idx >= p->nlargeobj ||
573 67fd6849 2022-02-13 stsp p->nlargeobj == 0 ||
574 67fd6849 2022-02-13 stsp p->hdr.large_offsets == NULL)
575 67fd6849 2022-02-13 stsp return got_error(GOT_ERR_BAD_PACKIDX);
576 67fd6849 2022-02-13 stsp loffset = be64toh(p->hdr.large_offsets[idx]);
577 67fd6849 2022-02-13 stsp p->sorted_large_offsets[j].offset = loffset;
578 67fd6849 2022-02-13 stsp p->sorted_large_offsets[j].idx = i;
581 67fd6849 2022-02-13 stsp p->sorted_offsets[k].offset = offset;
582 67fd6849 2022-02-13 stsp p->sorted_offsets[k].idx = i;
586 67fd6849 2022-02-13 stsp if (j != p->nlargeobj || k != nobj - p->nlargeobj)
587 67fd6849 2022-02-13 stsp return got_error(GOT_ERR_BAD_PACKIDX);
589 67fd6849 2022-02-13 stsp qsort(p->sorted_offsets, nobj - p->nlargeobj,
590 67fd6849 2022-02-13 stsp sizeof(p->sorted_offsets[0]), offset_cmp);
592 67fd6849 2022-02-13 stsp if (p->sorted_large_offsets)
593 67fd6849 2022-02-13 stsp qsort(p->sorted_large_offsets, p->nlargeobj,
594 67fd6849 2022-02-13 stsp sizeof(p->sorted_large_offsets[0]), large_offset_cmp);
596 67fd6849 2022-02-13 stsp return NULL;
599 876c234b 2018-09-10 stsp const struct got_error *
600 67fd6849 2022-02-13 stsp got_packidx_get_offset_idx(int *idx, struct got_packidx *packidx, off_t offset)
602 67fd6849 2022-02-13 stsp const struct got_error *err;
603 67fd6849 2022-02-13 stsp uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
604 67fd6849 2022-02-13 stsp int i, left, right;
608 67fd6849 2022-02-13 stsp if (packidx->sorted_offsets == NULL) {
609 67fd6849 2022-02-13 stsp err = build_offset_index(packidx);
611 67fd6849 2022-02-13 stsp return err;
614 67fd6849 2022-02-13 stsp if (offset >= 0x7fffffff) {
615 67fd6849 2022-02-13 stsp uint64_t lo;
616 67fd6849 2022-02-13 stsp left = 0, right = packidx->nlargeobj - 1;
617 67fd6849 2022-02-13 stsp while (left <= right) {
618 67fd6849 2022-02-13 stsp i = ((left + right) / 2);
619 67fd6849 2022-02-13 stsp lo = packidx->sorted_large_offsets[i].offset;
620 67fd6849 2022-02-13 stsp if (lo == offset) {
621 67fd6849 2022-02-13 stsp *idx = packidx->sorted_large_offsets[i].idx;
623 67fd6849 2022-02-13 stsp } else if (offset > lo)
624 67fd6849 2022-02-13 stsp left = i + 1;
625 67fd6849 2022-02-13 stsp else if (offset < lo)
626 67fd6849 2022-02-13 stsp right = i - 1;
629 67fd6849 2022-02-13 stsp uint32_t o;
630 67fd6849 2022-02-13 stsp left = 0, right = totobj - packidx->nlargeobj - 1;
631 67fd6849 2022-02-13 stsp while (left <= right) {
632 67fd6849 2022-02-13 stsp i = ((left + right) / 2);
633 67fd6849 2022-02-13 stsp o = packidx->sorted_offsets[i].offset;
634 67fd6849 2022-02-13 stsp if (o == offset) {
635 67fd6849 2022-02-13 stsp *idx = packidx->sorted_offsets[i].idx;
637 67fd6849 2022-02-13 stsp } else if (offset > o)
638 67fd6849 2022-02-13 stsp left = i + 1;
639 67fd6849 2022-02-13 stsp else if (offset < o)
640 67fd6849 2022-02-13 stsp right = i - 1;
644 67fd6849 2022-02-13 stsp return NULL;
647 67fd6849 2022-02-13 stsp const struct got_error *
648 67fd6849 2022-02-13 stsp got_packidx_get_object_id(struct got_object_id *id,
649 67fd6849 2022-02-13 stsp struct got_packidx *packidx, int idx)
651 67fd6849 2022-02-13 stsp uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
652 67fd6849 2022-02-13 stsp struct got_packidx_object_id *oid;
654 67fd6849 2022-02-13 stsp if (idx < 0 || idx >= totobj)
655 67fd6849 2022-02-13 stsp return got_error(GOT_ERR_NO_OBJ);
657 67fd6849 2022-02-13 stsp oid = &packidx->hdr.sorted_ids[idx];
658 67fd6849 2022-02-13 stsp memcpy(id->sha1, oid->sha1, SHA1_DIGEST_LENGTH);
659 67fd6849 2022-02-13 stsp return NULL;
662 67fd6849 2022-02-13 stsp const struct got_error *
663 dd88155e 2019-06-29 stsp got_packidx_match_id_str_prefix(struct got_object_id_queue *matched_ids,
664 4277420a 2019-06-29 stsp struct got_packidx *packidx, const char *id_str_prefix)
666 dd88155e 2019-06-29 stsp const struct got_error *err = NULL;
667 4277420a 2019-06-29 stsp u_int8_t id0;
668 78fb0967 2020-09-09 naddy uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
669 4277420a 2019-06-29 stsp char hex[3];
670 4277420a 2019-06-29 stsp size_t prefix_len = strlen(id_str_prefix);
671 e09a504c 2019-06-28 stsp struct got_packidx_object_id *oid;
672 404bde06 2022-01-03 stsp uint32_t i = 0;
674 dbdddfee 2021-06-23 naddy STAILQ_INIT(matched_ids);
676 4277420a 2019-06-29 stsp if (prefix_len < 2)
677 6dd1ece6 2019-11-10 stsp return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
679 4277420a 2019-06-29 stsp hex[0] = id_str_prefix[0];
680 4277420a 2019-06-29 stsp hex[1] = id_str_prefix[1];
681 4277420a 2019-06-29 stsp hex[2] = '\0';
682 4277420a 2019-06-29 stsp if (!got_parse_xdigit(&id0, hex))
683 6dd1ece6 2019-11-10 stsp return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
685 404bde06 2022-01-03 stsp if (id0 > 0)
686 404bde06 2022-01-03 stsp i = be32toh(packidx->hdr.fanout_table[id0 - 1]);
687 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[i];
688 4277420a 2019-06-29 stsp while (i < totobj && oid->sha1[0] == id0) {
689 4277420a 2019-06-29 stsp char id_str[SHA1_DIGEST_STRING_LENGTH];
690 dd88155e 2019-06-29 stsp struct got_object_qid *qid;
693 4277420a 2019-06-29 stsp if (!got_sha1_digest_to_str(oid->sha1, id_str, sizeof(id_str)))
694 4277420a 2019-06-29 stsp return got_error(GOT_ERR_NO_SPACE);
696 4277420a 2019-06-29 stsp cmp = strncmp(id_str, id_str_prefix, prefix_len);
697 4277420a 2019-06-29 stsp if (cmp < 0) {
698 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[++i];
700 4277420a 2019-06-29 stsp } else if (cmp > 0)
703 dd88155e 2019-06-29 stsp err = got_object_qid_alloc_partial(&qid);
706 d7b5a0e8 2022-04-20 stsp memcpy(qid->id.sha1, oid->sha1, SHA1_DIGEST_LENGTH);
707 dbdddfee 2021-06-23 naddy STAILQ_INSERT_TAIL(matched_ids, qid, entry);
709 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[++i];
713 0adc7bcc 2019-06-29 stsp got_object_id_queue_free(matched_ids);
714 3d589bee 2022-06-25 stsp return err;
717 3d589bee 2022-06-25 stsp static void
718 3d589bee 2022-06-25 stsp set_max_datasize(void)
720 3d589bee 2022-06-25 stsp struct rlimit rl;
722 3d589bee 2022-06-25 stsp if (getrlimit(RLIMIT_DATA, &rl) != 0)
725 3d589bee 2022-06-25 stsp rl.rlim_cur = rl.rlim_max;
726 3d589bee 2022-06-25 stsp setrlimit(RLIMIT_DATA, &rl);
729 3d589bee 2022-06-25 stsp const struct got_error *
730 3d589bee 2022-06-25 stsp got_pack_start_privsep_child(struct got_pack *pack, struct got_packidx *packidx)
732 3d589bee 2022-06-25 stsp const struct got_error *err = NULL;
733 3d589bee 2022-06-25 stsp int imsg_fds[2];
735 3d589bee 2022-06-25 stsp struct imsgbuf *ibuf;
737 3d589bee 2022-06-25 stsp ibuf = calloc(1, sizeof(*ibuf));
738 3d589bee 2022-06-25 stsp if (ibuf == NULL)
739 3d589bee 2022-06-25 stsp return got_error_from_errno("calloc");
741 3d589bee 2022-06-25 stsp pack->privsep_child = calloc(1, sizeof(*pack->privsep_child));
742 3d589bee 2022-06-25 stsp if (pack->privsep_child == NULL) {
743 3d589bee 2022-06-25 stsp err = got_error_from_errno("calloc");
744 3d589bee 2022-06-25 stsp free(ibuf);
745 3d589bee 2022-06-25 stsp return err;
747 3d589bee 2022-06-25 stsp pack->child_has_tempfiles = 0;
748 3d589bee 2022-06-25 stsp pack->child_has_delta_outfd = 0;
750 3d589bee 2022-06-25 stsp if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fds) == -1) {
751 3d589bee 2022-06-25 stsp err = got_error_from_errno("socketpair");
755 3d589bee 2022-06-25 stsp pid = fork();
756 3d589bee 2022-06-25 stsp if (pid == -1) {
757 3d589bee 2022-06-25 stsp err = got_error_from_errno("fork");
759 3d589bee 2022-06-25 stsp } else if (pid == 0) {
760 3d589bee 2022-06-25 stsp set_max_datasize();
761 3d589bee 2022-06-25 stsp got_privsep_exec_child(imsg_fds, GOT_PATH_PROG_READ_PACK,
762 3d589bee 2022-06-25 stsp pack->path_packfile);
763 3d589bee 2022-06-25 stsp /* not reached */
766 3d589bee 2022-06-25 stsp if (close(imsg_fds[1]) == -1)
767 3d589bee 2022-06-25 stsp return got_error_from_errno("close");
768 3d589bee 2022-06-25 stsp pack->privsep_child->imsg_fd = imsg_fds[0];
769 3d589bee 2022-06-25 stsp pack->privsep_child->pid = pid;
770 3d589bee 2022-06-25 stsp imsg_init(ibuf, imsg_fds[0]);
771 3d589bee 2022-06-25 stsp pack->privsep_child->ibuf = ibuf;
773 3d589bee 2022-06-25 stsp err = got_privsep_init_pack_child(ibuf, pack, packidx);
775 3d589bee 2022-06-25 stsp const struct got_error *child_err;
776 3d589bee 2022-06-25 stsp err = got_privsep_send_stop(pack->privsep_child->imsg_fd);
777 3d589bee 2022-06-25 stsp child_err = got_privsep_wait_for_child(
778 3d589bee 2022-06-25 stsp pack->privsep_child->pid);
779 3d589bee 2022-06-25 stsp if (child_err && err == NULL)
780 3d589bee 2022-06-25 stsp err = child_err;
784 3d589bee 2022-06-25 stsp free(ibuf);
785 3d589bee 2022-06-25 stsp free(pack->privsep_child);
786 3d589bee 2022-06-25 stsp pack->privsep_child = NULL;
788 dd88155e 2019-06-29 stsp return err;
791 b4f37570 2021-06-19 stsp static const struct got_error *
792 b4f37570 2021-06-19 stsp pack_stop_privsep_child(struct got_pack *pack)
794 96732e0b 2018-11-11 stsp const struct got_error *err = NULL;
796 876c234b 2018-09-10 stsp if (pack->privsep_child == NULL)
797 876c234b 2018-09-10 stsp return NULL;
799 876c234b 2018-09-10 stsp err = got_privsep_send_stop(pack->privsep_child->imsg_fd);
801 96732e0b 2018-11-11 stsp return err;
802 96732e0b 2018-11-11 stsp err = got_privsep_wait_for_child(pack->privsep_child->pid);
803 08578a35 2021-01-22 stsp if (close(pack->privsep_child->imsg_fd) == -1 && err == NULL)
804 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
805 cc2a8ef4 2021-06-19 tracey free(pack->privsep_child->ibuf);
806 876c234b 2018-09-10 stsp free(pack->privsep_child);
807 876c234b 2018-09-10 stsp pack->privsep_child = NULL;
808 876c234b 2018-09-10 stsp return err;
811 d7464085 2018-07-09 stsp const struct got_error *
812 7e656b93 2018-03-17 stsp got_pack_close(struct got_pack *pack)
814 d7464085 2018-07-09 stsp const struct got_error *err = NULL;
816 b4f37570 2021-06-19 stsp err = pack_stop_privsep_child(pack);
817 876c234b 2018-09-10 stsp if (pack->map && munmap(pack->map, pack->filesize) == -1 && !err)
818 638f9024 2019-05-13 stsp err = got_error_from_errno("munmap");
819 08578a35 2021-01-22 stsp if (pack->fd != -1 && close(pack->fd) == -1 && err == NULL)
820 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
821 8b2180d4 2018-04-26 stsp pack->fd = -1;
822 4589e373 2018-03-17 stsp free(pack->path_packfile);
823 4589e373 2018-03-17 stsp pack->path_packfile = NULL;
824 4589e373 2018-03-17 stsp pack->filesize = 0;
825 ab2f42e7 2019-11-10 stsp if (pack->delta_cache) {
826 ab2f42e7 2019-11-10 stsp got_delta_cache_free(pack->delta_cache);
827 ab2f42e7 2019-11-10 stsp pack->delta_cache = NULL;
831 57160834 2022-05-31 stsp * Leave accumfd and basefd alone. They are managed by the
832 57160834 2022-05-31 stsp * repository layer and can be reused.
835 c7fe698a 2018-01-23 stsp return err;
838 668a20f6 2020-03-18 stsp const struct got_error *
839 668a20f6 2020-03-18 stsp got_pack_parse_object_type_and_size(uint8_t *type, uint64_t *size, size_t *len,
840 d7464085 2018-07-09 stsp struct got_pack *pack, off_t offset)
842 a487c1d0 2018-01-14 stsp uint8_t t = 0;
843 a487c1d0 2018-01-14 stsp uint64_t s = 0;
844 a487c1d0 2018-01-14 stsp uint8_t sizeN;
845 d7464085 2018-07-09 stsp size_t mapoff = 0;
850 d7464085 2018-07-09 stsp if (offset >= pack->filesize)
851 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
853 d7464085 2018-07-09 stsp if (pack->map) {
854 d7464085 2018-07-09 stsp mapoff = (size_t)offset;
856 d7464085 2018-07-09 stsp if (lseek(pack->fd, offset, SEEK_SET) == -1)
857 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
861 a1fd68d8 2018-01-12 stsp /* We do not support size values which don't fit in 64 bit. */
863 09ee8ded 2022-10-20 stsp return got_error_fmt(GOT_ERR_OBJ_TOO_LARGE,
864 09ee8ded 2022-10-20 stsp "packfile offset %llu", offset);
866 d7464085 2018-07-09 stsp if (pack->map) {
867 3976db15 2022-01-10 stsp if (mapoff + sizeof(sizeN) >= pack->filesize)
868 3976db15 2022-01-10 stsp return got_error(GOT_ERR_BAD_PACKFILE);
869 d7464085 2018-07-09 stsp sizeN = *(pack->map + mapoff);
870 d7464085 2018-07-09 stsp mapoff += sizeof(sizeN);
872 d7464085 2018-07-09 stsp ssize_t n = read(pack->fd, &sizeN, sizeof(sizeN));
874 638f9024 2019-05-13 stsp return got_error_from_errno("read");
875 d7464085 2018-07-09 stsp if (n != sizeof(sizeN))
876 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
878 d7464085 2018-07-09 stsp *len += sizeof(sizeN);
880 a1fd68d8 2018-01-12 stsp if (i == 0) {
881 a487c1d0 2018-01-14 stsp t = (sizeN & GOT_PACK_OBJ_SIZE0_TYPE_MASK) >>
882 a1fd68d8 2018-01-12 stsp GOT_PACK_OBJ_SIZE0_TYPE_MASK_SHIFT;
883 a487c1d0 2018-01-14 stsp s = (sizeN & GOT_PACK_OBJ_SIZE0_VAL_MASK);
885 a1fd68d8 2018-01-12 stsp size_t shift = 4 + 7 * (i - 1);
886 a487c1d0 2018-01-14 stsp s |= ((sizeN & GOT_PACK_OBJ_SIZE_VAL_MASK) << shift);
889 a1fd68d8 2018-01-12 stsp } while (sizeN & GOT_PACK_OBJ_SIZE_MORE);
893 a487c1d0 2018-01-14 stsp return NULL;
896 a1fd68d8 2018-01-12 stsp static const struct got_error *
897 5f25cc85 2019-11-26 stsp open_plain_object(struct got_object **obj, struct got_object_id *id,
898 5f25cc85 2019-11-26 stsp uint8_t type, off_t offset, size_t size, int idx)
900 6ccb713b 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
901 6ccb713b 2018-01-19 stsp if (*obj == NULL)
902 638f9024 2019-05-13 stsp return got_error_from_errno("calloc");
904 6ccb713b 2018-01-19 stsp (*obj)->type = type;
905 6ccb713b 2018-01-19 stsp (*obj)->flags = GOT_OBJ_FLAG_PACKED;
906 c59b3346 2018-09-11 stsp (*obj)->pack_idx = idx;
907 6ccb713b 2018-01-19 stsp (*obj)->hdrlen = 0;
908 6ccb713b 2018-01-19 stsp (*obj)->size = size;
909 106807b4 2018-09-15 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
910 6ccb713b 2018-01-19 stsp (*obj)->pack_offset = offset;
912 b107e67f 2018-01-19 stsp return NULL;
915 b107e67f 2018-01-19 stsp static const struct got_error *
916 d7464085 2018-07-09 stsp parse_negative_offset(int64_t *offset, size_t *len, struct got_pack *pack,
917 d7464085 2018-07-09 stsp off_t delta_offset)
919 b107e67f 2018-01-19 stsp int64_t o = 0;
920 b107e67f 2018-01-19 stsp uint8_t offN;
923 a0de39f3 2019-08-09 stsp *offset = 0;
927 b107e67f 2018-01-19 stsp /* We do not support offset values which don't fit in 64 bit. */
929 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_NO_SPACE);
931 d7464085 2018-07-09 stsp if (pack->map) {
932 d7464085 2018-07-09 stsp size_t mapoff;
933 d7464085 2018-07-09 stsp mapoff = (size_t)delta_offset + *len;
934 3976db15 2022-01-10 stsp if (mapoff + sizeof(offN) >= pack->filesize)
935 3976db15 2022-01-10 stsp return got_error(GOT_ERR_PACK_OFFSET);
936 d7464085 2018-07-09 stsp offN = *(pack->map + mapoff);
939 d7464085 2018-07-09 stsp n = read(pack->fd, &offN, sizeof(offN));
941 638f9024 2019-05-13 stsp return got_error_from_errno("read");
942 d7464085 2018-07-09 stsp if (n != sizeof(offN))
943 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
945 d7464085 2018-07-09 stsp *len += sizeof(offN);
947 b107e67f 2018-01-19 stsp if (i == 0)
948 b107e67f 2018-01-19 stsp o = (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
952 cecc778e 2018-01-23 stsp o += (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
955 b107e67f 2018-01-19 stsp } while (offN & GOT_PACK_OBJ_DELTA_OFF_MORE);
957 b107e67f 2018-01-19 stsp *offset = o;
958 6ccb713b 2018-01-19 stsp return NULL;
961 668a20f6 2020-03-18 stsp const struct got_error *
962 c0df5966 2021-12-31 stsp got_pack_parse_offset_delta(off_t *base_offset, size_t *len,
963 c0df5966 2021-12-31 stsp struct got_pack *pack, off_t offset, int tslen)
965 96f5e8b3 2018-01-23 stsp const struct got_error *err;
966 b107e67f 2018-01-19 stsp int64_t negoffset;
967 b107e67f 2018-01-19 stsp size_t negofflen;
971 d7464085 2018-07-09 stsp err = parse_negative_offset(&negoffset, &negofflen, pack,
972 d7464085 2018-07-09 stsp offset + tslen);
974 b107e67f 2018-01-19 stsp return err;
976 b107e67f 2018-01-19 stsp /* Compute the base object's offset (must be in the same pack file). */
977 96f5e8b3 2018-01-23 stsp *base_offset = (offset - negoffset);
978 96f5e8b3 2018-01-23 stsp if (*base_offset <= 0)
979 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_BAD_PACKFILE);
981 d7464085 2018-07-09 stsp *len = negofflen;
982 96f5e8b3 2018-01-23 stsp return NULL;
985 0e22967e 2018-02-11 stsp static const struct got_error *
986 42c69117 2019-11-10 stsp read_delta_data(uint8_t **delta_buf, size_t *delta_len,
987 2d9e6abf 2022-05-04 stsp size_t *delta_compressed_len, size_t delta_data_offset,
988 2d9e6abf 2022-05-04 stsp struct got_pack *pack)
990 42c69117 2019-11-10 stsp const struct got_error *err = NULL;
991 2d9e6abf 2022-05-04 stsp size_t consumed = 0;
993 42c69117 2019-11-10 stsp if (pack->map) {
994 42c69117 2019-11-10 stsp if (delta_data_offset >= pack->filesize)
995 42c69117 2019-11-10 stsp return got_error(GOT_ERR_PACK_OFFSET);
996 2e5a6fad 2020-03-18 stsp err = got_inflate_to_mem_mmap(delta_buf, delta_len,
997 2d9e6abf 2022-05-04 stsp &consumed, NULL, pack->map, delta_data_offset,
998 2e5a6fad 2020-03-18 stsp pack->filesize - delta_data_offset);
1000 2d9e6abf 2022-05-04 stsp return err;
1002 42c69117 2019-11-10 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET) == -1)
1003 42c69117 2019-11-10 stsp return got_error_from_errno("lseek");
1004 2d9e6abf 2022-05-04 stsp err = got_inflate_to_mem_fd(delta_buf, delta_len,
1005 2d9e6abf 2022-05-04 stsp &consumed, NULL, 0, pack->fd);
1007 2d9e6abf 2022-05-04 stsp return err;
1010 2d9e6abf 2022-05-04 stsp if (delta_compressed_len)
1011 2d9e6abf 2022-05-04 stsp *delta_compressed_len = consumed;
1013 2d9e6abf 2022-05-04 stsp return NULL;
1016 96f5e8b3 2018-01-23 stsp static const struct got_error *
1017 c336f889 2018-07-23 stsp add_delta(struct got_delta_chain *deltas, off_t delta_offset, size_t tslen,
1018 42c69117 2019-11-10 stsp int delta_type, size_t delta_size, size_t delta_data_offset)
1020 bdd2fbb3 2018-02-11 stsp struct got_delta *delta;
1022 c336f889 2018-07-23 stsp delta = got_delta_open(delta_offset, tslen, delta_type, delta_size,
1023 42c69117 2019-11-10 stsp delta_data_offset);
1024 bdd2fbb3 2018-02-11 stsp if (delta == NULL)
1025 638f9024 2019-05-13 stsp return got_error_from_errno("got_delta_open");
1026 bdd2fbb3 2018-02-11 stsp /* delta is freed in got_object_close() */
1027 bdd2fbb3 2018-02-11 stsp deltas->nentries++;
1028 dbdddfee 2021-06-23 naddy STAILQ_INSERT_HEAD(&deltas->entries, delta, entry);
1029 bdd2fbb3 2018-02-11 stsp return NULL;
1032 bdd2fbb3 2018-02-11 stsp static const struct got_error *
1033 6b9c9673 2018-01-23 stsp resolve_offset_delta(struct got_delta_chain *deltas,
1034 c8ecd499 2018-09-09 stsp struct got_packidx *packidx, struct got_pack *pack, off_t delta_offset,
1035 c8ecd499 2018-09-09 stsp size_t tslen, int delta_type, size_t delta_size, unsigned int recursion)
1038 a3500804 2018-01-23 stsp const struct got_error *err;
1039 c3703302 2018-01-23 stsp off_t base_offset;
1040 c3703302 2018-01-23 stsp uint8_t base_type;
1041 c3703302 2018-01-23 stsp uint64_t base_size;
1042 c3703302 2018-01-23 stsp size_t base_tslen;
1043 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
1044 42c69117 2019-11-10 stsp size_t consumed;
1046 668a20f6 2020-03-18 stsp err = got_pack_parse_offset_delta(&base_offset, &consumed, pack,
1047 d7464085 2018-07-09 stsp delta_offset, tslen);
1049 a3500804 2018-01-23 stsp return err;
1051 d7464085 2018-07-09 stsp delta_data_offset = delta_offset + tslen + consumed;
1052 d7464085 2018-07-09 stsp if (delta_data_offset >= pack->filesize)
1053 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1055 d7464085 2018-07-09 stsp if (pack->map == NULL) {
1056 d7464085 2018-07-09 stsp delta_data_offset = lseek(pack->fd, 0, SEEK_CUR);
1057 d7464085 2018-07-09 stsp if (delta_data_offset == -1)
1058 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
1061 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type, delta_size,
1062 42c69117 2019-11-10 stsp delta_data_offset);
1064 1a35c1bc 2019-05-22 stsp return err;
1066 c3703302 2018-01-23 stsp /* An offset delta must be in the same packfile. */
1067 1a35c1bc 2019-05-22 stsp if (base_offset >= pack->filesize)
1068 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_PACK_OFFSET);
1070 668a20f6 2020-03-18 stsp err = got_pack_parse_object_type_and_size(&base_type, &base_size,
1071 668a20f6 2020-03-18 stsp &base_tslen, pack, base_offset);
1073 1a35c1bc 2019-05-22 stsp return err;
1075 668a20f6 2020-03-18 stsp return got_pack_resolve_delta_chain(deltas, packidx, pack, base_offset,
1076 b0e2201a 2018-06-22 stsp base_tslen, base_type, base_size, recursion - 1);
1079 c4330eff 2021-06-22 stsp const struct got_error *
1080 c4330eff 2021-06-22 stsp got_pack_parse_ref_delta(struct got_object_id *id,
1081 c4330eff 2021-06-22 stsp struct got_pack *pack, off_t delta_offset, int tslen)
1083 c4330eff 2021-06-22 stsp if (pack->map) {
1084 c4330eff 2021-06-22 stsp size_t mapoff = delta_offset + tslen;
1085 3976db15 2022-01-10 stsp if (mapoff + sizeof(*id) >= pack->filesize)
1086 3976db15 2022-01-10 stsp return got_error(GOT_ERR_PACK_OFFSET);
1087 c4330eff 2021-06-22 stsp memcpy(id, pack->map + mapoff, sizeof(*id));
1089 c4330eff 2021-06-22 stsp ssize_t n;
1090 c4330eff 2021-06-22 stsp n = read(pack->fd, id, sizeof(*id));
1091 c4330eff 2021-06-22 stsp if (n < 0)
1092 c4330eff 2021-06-22 stsp return got_error_from_errno("read");
1093 c4330eff 2021-06-22 stsp if (n != sizeof(*id))
1094 c4330eff 2021-06-22 stsp return got_error(GOT_ERR_BAD_PACKFILE);
1097 c4330eff 2021-06-22 stsp return NULL;
1100 c3703302 2018-01-23 stsp static const struct got_error *
1101 c8ecd499 2018-09-09 stsp resolve_ref_delta(struct got_delta_chain *deltas, struct got_packidx *packidx,
1102 c8ecd499 2018-09-09 stsp struct got_pack *pack, off_t delta_offset, size_t tslen, int delta_type,
1103 c8ecd499 2018-09-09 stsp size_t delta_size, unsigned int recursion)
1105 6b9c9673 2018-01-23 stsp const struct got_error *err;
1106 6b9c9673 2018-01-23 stsp struct got_object_id id;
1108 6b9c9673 2018-01-23 stsp off_t base_offset;
1109 6b9c9673 2018-01-23 stsp uint8_t base_type;
1110 6b9c9673 2018-01-23 stsp uint64_t base_size;
1111 6b9c9673 2018-01-23 stsp size_t base_tslen;
1112 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
1114 42c69117 2019-11-10 stsp if (delta_offset + tslen >= pack->filesize)
1115 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1117 c4330eff 2021-06-22 stsp err = got_pack_parse_ref_delta(&id, pack, delta_offset, tslen);
1119 c4330eff 2021-06-22 stsp return err;
1120 d7464085 2018-07-09 stsp if (pack->map) {
1121 c4330eff 2021-06-22 stsp delta_data_offset = delta_offset + tslen + sizeof(id);
1123 e40b19ed 2020-01-06 stsp delta_data_offset = lseek(pack->fd, 0, SEEK_CUR);
1124 e40b19ed 2020-01-06 stsp if (delta_data_offset == -1)
1125 e40b19ed 2020-01-06 stsp return got_error_from_errno("lseek");
1128 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type, delta_size,
1129 42c69117 2019-11-10 stsp delta_data_offset);
1131 1a35c1bc 2019-05-22 stsp return err;
1133 652b2703 2018-06-22 stsp /* Delta base must be in the same pack file. */
1134 1510f469 2018-09-09 stsp idx = got_packidx_get_object_idx(packidx, &id);
1135 1a35c1bc 2019-05-22 stsp if (idx == -1)
1136 668a20f6 2020-03-18 stsp return got_error(GOT_ERR_NO_OBJ);
1138 02828bfd 2021-06-22 stsp base_offset = got_packidx_get_object_offset(packidx, idx);
1139 04aed155 2022-07-24 naddy if (base_offset == -1)
1140 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_BAD_PACKIDX);
1142 1a35c1bc 2019-05-22 stsp if (base_offset >= pack->filesize)
1143 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_PACK_OFFSET);
1145 668a20f6 2020-03-18 stsp err = got_pack_parse_object_type_and_size(&base_type, &base_size,
1146 668a20f6 2020-03-18 stsp &base_tslen, pack, base_offset);
1148 1a35c1bc 2019-05-22 stsp return err;
1150 668a20f6 2020-03-18 stsp return got_pack_resolve_delta_chain(deltas, packidx, pack, base_offset,
1151 0c048b15 2018-04-27 stsp base_tslen, base_type, base_size, recursion - 1);
1154 668a20f6 2020-03-18 stsp const struct got_error *
1155 668a20f6 2020-03-18 stsp got_pack_resolve_delta_chain(struct got_delta_chain *deltas,
1156 668a20f6 2020-03-18 stsp struct got_packidx *packidx, struct got_pack *pack, off_t delta_offset,
1157 668a20f6 2020-03-18 stsp size_t tslen, int delta_type, size_t delta_size, unsigned int recursion)
1159 c3703302 2018-01-23 stsp const struct got_error *err = NULL;
1161 5b7e13a7 2018-04-02 stsp if (--recursion == 0)
1162 5b7e13a7 2018-04-02 stsp return got_error(GOT_ERR_RECURSION);
1164 c3703302 2018-01-23 stsp switch (delta_type) {
1165 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_COMMIT:
1166 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TREE:
1167 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_BLOB:
1168 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TAG:
1169 c3703302 2018-01-23 stsp /* Plain types are the final delta base. Recursion ends. */
1170 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type,
1171 42c69117 2019-11-10 stsp delta_size, 0);
1173 a3500804 2018-01-23 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
1174 c8ecd499 2018-09-09 stsp err = resolve_offset_delta(deltas, packidx, pack,
1175 b0e2201a 2018-06-22 stsp delta_offset, tslen, delta_type, delta_size, recursion - 1);
1177 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_REF_DELTA:
1178 c8ecd499 2018-09-09 stsp err = resolve_ref_delta(deltas, packidx, pack,
1179 b0e2201a 2018-06-22 stsp delta_offset, tslen, delta_type, delta_size, recursion - 1);
1182 4810de4a 2018-04-01 stsp return got_error(GOT_ERR_OBJ_TYPE);
1185 96f5e8b3 2018-01-23 stsp return err;
1188 96f5e8b3 2018-01-23 stsp static const struct got_error *
1189 a98c62b1 2018-09-09 stsp open_delta_object(struct got_object **obj, struct got_packidx *packidx,
1190 a98c62b1 2018-09-09 stsp struct got_pack *pack, struct got_object_id *id, off_t offset,
1191 c59b3346 2018-09-11 stsp size_t tslen, int delta_type, size_t delta_size, int idx)
1193 96f5e8b3 2018-01-23 stsp const struct got_error *err = NULL;
1194 96f5e8b3 2018-01-23 stsp int resolved_type;
1196 b107e67f 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
1197 b107e67f 2018-01-19 stsp if (*obj == NULL)
1198 638f9024 2019-05-13 stsp return got_error_from_errno("calloc");
1200 96f5e8b3 2018-01-23 stsp (*obj)->flags = 0;
1201 b107e67f 2018-01-19 stsp (*obj)->hdrlen = 0;
1202 39e73dc9 2018-03-03 stsp (*obj)->size = 0; /* Not known because deltas aren't applied yet. */
1203 106807b4 2018-09-15 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
1204 cecc778e 2018-01-23 stsp (*obj)->pack_offset = offset + tslen;
1206 dbdddfee 2021-06-23 naddy STAILQ_INIT(&(*obj)->deltas.entries);
1207 1a35c1bc 2019-05-22 stsp (*obj)->flags |= GOT_OBJ_FLAG_DELTIFIED;
1208 96f5e8b3 2018-01-23 stsp (*obj)->flags |= GOT_OBJ_FLAG_PACKED;
1209 c59b3346 2018-09-11 stsp (*obj)->pack_idx = idx;
1211 668a20f6 2020-03-18 stsp err = got_pack_resolve_delta_chain(&(*obj)->deltas, packidx, pack,
1212 668a20f6 2020-03-18 stsp offset, tslen, delta_type, delta_size,
1213 668a20f6 2020-03-18 stsp GOT_DELTA_CHAIN_RECURSION_MAX);
1215 96f5e8b3 2018-01-23 stsp goto done;
1217 96f5e8b3 2018-01-23 stsp err = got_delta_chain_get_base_type(&resolved_type, &(*obj)->deltas);
1219 96f5e8b3 2018-01-23 stsp goto done;
1220 96f5e8b3 2018-01-23 stsp (*obj)->type = resolved_type;
1222 96f5e8b3 2018-01-23 stsp if (err) {
1223 96f5e8b3 2018-01-23 stsp got_object_close(*obj);
1224 96f5e8b3 2018-01-23 stsp *obj = NULL;
1226 96f5e8b3 2018-01-23 stsp return err;
1229 2090a03d 2018-09-09 stsp const struct got_error *
1230 2090a03d 2018-09-09 stsp got_packfile_open_object(struct got_object **obj, struct got_pack *pack,
1231 6fd11751 2018-06-04 stsp struct got_packidx *packidx, int idx, struct got_object_id *id)
1233 a1fd68d8 2018-01-12 stsp const struct got_error *err = NULL;
1234 a1fd68d8 2018-01-12 stsp off_t offset;
1235 6c00b545 2018-01-17 stsp uint8_t type;
1236 6c00b545 2018-01-17 stsp uint64_t size;
1237 3ee5fc21 2018-01-17 stsp size_t tslen;
1239 6c00b545 2018-01-17 stsp *obj = NULL;
1241 02828bfd 2021-06-22 stsp offset = got_packidx_get_object_offset(packidx, idx);
1242 04aed155 2022-07-24 naddy if (offset == -1)
1243 a1fd68d8 2018-01-12 stsp return got_error(GOT_ERR_BAD_PACKIDX);
1245 668a20f6 2020-03-18 stsp err = got_pack_parse_object_type_and_size(&type, &size, &tslen,
1246 668a20f6 2020-03-18 stsp pack, offset);
1248 35c73765 2018-09-09 stsp return err;
1250 6c00b545 2018-01-17 stsp switch (type) {
1251 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_COMMIT:
1252 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_TREE:
1253 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_BLOB:
1254 d33fc9ef 2018-01-23 stsp case GOT_OBJ_TYPE_TAG:
1255 5f25cc85 2019-11-26 stsp err = open_plain_object(obj, id, type, offset + tslen,
1256 5f25cc85 2019-11-26 stsp size, idx);
1258 b107e67f 2018-01-19 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
1259 a48db7e5 2018-01-23 stsp case GOT_OBJ_TYPE_REF_DELTA:
1260 a98c62b1 2018-09-09 stsp err = open_delta_object(obj, packidx, pack, id, offset,
1261 c59b3346 2018-09-11 stsp tslen, type, size, idx);
1264 4810de4a 2018-04-01 stsp err = got_error(GOT_ERR_OBJ_TYPE);
1268 3ee5fc21 2018-01-17 stsp return err;
1271 d582f26c 2020-03-18 stsp const struct got_error *
1272 c0df5966 2021-12-31 stsp got_pack_get_delta_chain_max_size(uint64_t *max_size,
1273 c0df5966 2021-12-31 stsp struct got_delta_chain *deltas, struct got_pack *pack)
1275 22484865 2018-03-13 stsp struct got_delta *delta;
1276 22484865 2018-03-13 stsp uint64_t base_size = 0, result_size = 0;
1278 22484865 2018-03-13 stsp *max_size = 0;
1279 dbdddfee 2021-06-23 naddy STAILQ_FOREACH(delta, &deltas->entries, entry) {
1280 22484865 2018-03-13 stsp /* Plain object types are the delta base. */
1281 22484865 2018-03-13 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1282 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1283 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1284 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1285 22484865 2018-03-13 stsp const struct got_error *err;
1286 aabb25f8 2022-10-17 stsp uint8_t *delta_buf = NULL;
1287 42c69117 2019-11-10 stsp size_t delta_len;
1288 ab2f42e7 2019-11-10 stsp int cached = 1;
1290 aabb25f8 2022-10-17 stsp if (pack->delta_cache) {
1291 aabb25f8 2022-10-17 stsp got_delta_cache_get(&delta_buf, &delta_len,
1292 aabb25f8 2022-10-17 stsp pack->delta_cache, delta->data_offset);
1294 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1295 ab2f42e7 2019-11-10 stsp cached = 0;
1296 ab2f42e7 2019-11-10 stsp err = read_delta_data(&delta_buf, &delta_len,
1297 2d9e6abf 2022-05-04 stsp NULL, delta->data_offset, pack);
1299 ab2f42e7 2019-11-10 stsp return err;
1301 aabb25f8 2022-10-17 stsp if (pack->delta_cache && !cached) {
1302 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1303 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1304 ab2f42e7 2019-11-10 stsp if (err == NULL)
1305 ab2f42e7 2019-11-10 stsp cached = 1;
1306 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1307 ab2f42e7 2019-11-10 stsp free(delta_buf);
1308 ab2f42e7 2019-11-10 stsp return err;
1311 a53d2f13 2018-03-17 stsp err = got_delta_get_sizes(&base_size, &result_size,
1312 42c69117 2019-11-10 stsp delta_buf, delta_len);
1313 ab2f42e7 2019-11-10 stsp if (!cached)
1314 ab2f42e7 2019-11-10 stsp free(delta_buf);
1316 22484865 2018-03-13 stsp return err;
1318 22484865 2018-03-13 stsp base_size = delta->size;
1319 22484865 2018-03-13 stsp if (base_size > *max_size)
1320 22484865 2018-03-13 stsp *max_size = base_size;
1321 22484865 2018-03-13 stsp if (result_size > *max_size)
1322 22484865 2018-03-13 stsp *max_size = result_size;
1325 9feb4ff2 2018-03-14 stsp return NULL;
1328 ac544f8c 2019-01-13 stsp const struct got_error *
1329 42c69117 2019-11-10 stsp got_pack_get_max_delta_object_size(uint64_t *size, struct got_object *obj,
1330 42c69117 2019-11-10 stsp struct got_pack *pack)
1332 85a703fa 2019-01-13 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0)
1333 85a703fa 2019-01-13 stsp return got_error(GOT_ERR_OBJ_TYPE);
1335 d582f26c 2020-03-18 stsp return got_pack_get_delta_chain_max_size(size, &obj->deltas, pack);
1338 668a20f6 2020-03-18 stsp const struct got_error *
1339 4788f1ce 2020-03-18 stsp got_pack_dump_delta_chain_to_file(size_t *result_size,
1340 4788f1ce 2020-03-18 stsp struct got_delta_chain *deltas, struct got_pack *pack, FILE *outfile,
1341 4788f1ce 2020-03-18 stsp FILE *base_file, FILE *accum_file)
1343 efd2a263 2018-01-19 stsp const struct got_error *err = NULL;
1344 6691714a 2018-01-23 stsp struct got_delta *delta;
1345 aabb25f8 2022-10-17 stsp uint8_t *base_buf = NULL, *accum_buf = NULL;
1346 6395114c 2022-05-31 stsp size_t base_bufsz = 0, accum_bufsz = 0, accum_size = 0, delta_len;
1347 6395114c 2022-05-31 stsp /* We process small enough files entirely in memory for speed. */
1348 6395114c 2022-05-31 stsp const size_t max_bufsize = GOT_DELTA_RESULT_SIZE_CACHED_MAX;
1349 6395114c 2022-05-31 stsp uint64_t max_size = 0;
1350 6691714a 2018-01-23 stsp int n = 0;
1352 b29656e2 2018-03-16 stsp *result_size = 0;
1354 dbdddfee 2021-06-23 naddy if (STAILQ_EMPTY(&deltas->entries))
1355 6691714a 2018-01-23 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
1357 6395114c 2022-05-31 stsp if (fseeko(base_file, 0L, SEEK_SET) == -1)
1358 6395114c 2022-05-31 stsp return got_error_from_errno("fseeko");
1359 6395114c 2022-05-31 stsp if (fseeko(accum_file, 0L, SEEK_SET) == -1)
1360 6395114c 2022-05-31 stsp return got_error_from_errno("fseeko");
1362 6691714a 2018-01-23 stsp /* Deltas are ordered in ascending order. */
1363 dbdddfee 2021-06-23 naddy STAILQ_FOREACH(delta, &deltas->entries, entry) {
1364 aabb25f8 2022-10-17 stsp uint8_t *delta_buf = NULL;
1365 6395114c 2022-05-31 stsp uint64_t base_size, result_size = 0;
1366 ab2f42e7 2019-11-10 stsp int cached = 1;
1367 a6b158cc 2018-02-11 stsp if (n == 0) {
1368 34fca9c3 2018-11-11 stsp size_t mapoff;
1369 0c048b15 2018-04-27 stsp off_t delta_data_offset;
1371 a6b158cc 2018-02-11 stsp /* Plain object types are the delta base. */
1372 a6b158cc 2018-02-11 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1373 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1374 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1375 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1376 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1377 72eb3431 2018-04-01 stsp goto done;
1380 0c048b15 2018-04-27 stsp delta_data_offset = delta->offset + delta->tslen;
1381 0c048b15 2018-04-27 stsp if (delta_data_offset >= pack->filesize) {
1382 0c048b15 2018-04-27 stsp err = got_error(GOT_ERR_PACK_OFFSET);
1383 0c048b15 2018-04-27 stsp goto done;
1385 d7464085 2018-07-09 stsp if (pack->map == NULL) {
1386 d7464085 2018-07-09 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET)
1388 638f9024 2019-05-13 stsp err = got_error_from_errno("lseek");
1389 d7464085 2018-07-09 stsp goto done;
1392 6395114c 2022-05-31 stsp if (delta->size > max_size)
1393 6395114c 2022-05-31 stsp max_size = delta->size;
1394 6395114c 2022-05-31 stsp if (max_size > max_bufsize) {
1395 d7464085 2018-07-09 stsp if (pack->map) {
1396 d7464085 2018-07-09 stsp mapoff = (size_t)delta_data_offset;
1397 d7464085 2018-07-09 stsp err = got_inflate_to_file_mmap(
1398 4788f1ce 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->map,
1399 4788f1ce 2020-03-18 stsp mapoff, pack->filesize - mapoff,
1400 4788f1ce 2020-03-18 stsp base_file);
1402 34fca9c3 2018-11-11 stsp err = got_inflate_to_file_fd(
1403 4788f1ce 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->fd,
1404 4788f1ce 2020-03-18 stsp base_file);
1406 6395114c 2022-05-31 stsp accum_buf = malloc(max_size);
1407 6395114c 2022-05-31 stsp if (accum_buf == NULL) {
1408 6395114c 2022-05-31 stsp err = got_error_from_errno("malloc");
1409 6395114c 2022-05-31 stsp goto done;
1411 6395114c 2022-05-31 stsp accum_bufsz = max_size;
1412 d7464085 2018-07-09 stsp if (pack->map) {
1413 d7464085 2018-07-09 stsp mapoff = (size_t)delta_data_offset;
1414 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&base_buf,
1415 2e5a6fad 2020-03-18 stsp &base_bufsz, NULL, NULL,
1416 2e5a6fad 2020-03-18 stsp pack->map, mapoff,
1417 d7464085 2018-07-09 stsp pack->filesize - mapoff);
1419 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&base_buf,
1420 55fdd257 2020-03-18 stsp &base_bufsz, NULL, NULL, max_size,
1421 55fdd257 2020-03-18 stsp pack->fd);
1424 a6b158cc 2018-02-11 stsp goto done;
1426 6395114c 2022-05-31 stsp if (base_buf == NULL)
1427 8628c62d 2018-03-15 stsp rewind(base_file);
1431 aabb25f8 2022-10-17 stsp if (pack->delta_cache) {
1432 aabb25f8 2022-10-17 stsp got_delta_cache_get(&delta_buf, &delta_len,
1433 aabb25f8 2022-10-17 stsp pack->delta_cache, delta->data_offset);
1435 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1436 ab2f42e7 2019-11-10 stsp cached = 0;
1437 2d9e6abf 2022-05-04 stsp err = read_delta_data(&delta_buf, &delta_len, NULL,
1438 ab2f42e7 2019-11-10 stsp delta->data_offset, pack);
1440 ab2f42e7 2019-11-10 stsp goto done;
1442 aabb25f8 2022-10-17 stsp if (pack->delta_cache && !cached) {
1443 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1444 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1445 ab2f42e7 2019-11-10 stsp if (err == NULL)
1446 ab2f42e7 2019-11-10 stsp cached = 1;
1447 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1448 ab2f42e7 2019-11-10 stsp free(delta_buf);
1449 ab2f42e7 2019-11-10 stsp goto done;
1453 6395114c 2022-05-31 stsp err = got_delta_get_sizes(&base_size, &result_size,
1454 6395114c 2022-05-31 stsp delta_buf, delta_len);
1456 6395114c 2022-05-31 stsp goto done;
1457 6395114c 2022-05-31 stsp if (base_size > max_size)
1458 6395114c 2022-05-31 stsp max_size = base_size;
1459 6395114c 2022-05-31 stsp if (result_size > max_size)
1460 6395114c 2022-05-31 stsp max_size = result_size;
1462 6395114c 2022-05-31 stsp if (base_buf && max_size > max_bufsize) {
1463 6395114c 2022-05-31 stsp /* Switch from buffers to temporary files. */
1464 6395114c 2022-05-31 stsp size_t w = fwrite(base_buf, 1, base_bufsz,
1465 6395114c 2022-05-31 stsp base_file);
1466 6395114c 2022-05-31 stsp if (w != base_bufsz) {
1467 6395114c 2022-05-31 stsp err = got_ferror(outfile, GOT_ERR_IO);
1468 6395114c 2022-05-31 stsp goto done;
1470 6395114c 2022-05-31 stsp free(base_buf);
1471 6395114c 2022-05-31 stsp base_buf = NULL;
1472 6395114c 2022-05-31 stsp free(accum_buf);
1473 6395114c 2022-05-31 stsp accum_buf = NULL;
1476 6395114c 2022-05-31 stsp if (base_buf && max_size > base_bufsz) {
1477 6395114c 2022-05-31 stsp uint8_t *p = realloc(base_buf, max_size);
1478 6395114c 2022-05-31 stsp if (p == NULL) {
1479 6395114c 2022-05-31 stsp err = got_error_from_errno("realloc");
1480 6395114c 2022-05-31 stsp goto done;
1482 6395114c 2022-05-31 stsp base_buf = p;
1483 6395114c 2022-05-31 stsp base_bufsz = max_size;
1486 6395114c 2022-05-31 stsp if (accum_buf && max_size > accum_bufsz) {
1487 6395114c 2022-05-31 stsp uint8_t *p = realloc(accum_buf, max_size);
1488 6395114c 2022-05-31 stsp if (p == NULL) {
1489 6395114c 2022-05-31 stsp err = got_error_from_errno("realloc");
1490 6395114c 2022-05-31 stsp goto done;
1492 6395114c 2022-05-31 stsp accum_buf = p;
1493 6395114c 2022-05-31 stsp accum_bufsz = max_size;
1496 8628c62d 2018-03-15 stsp if (base_buf) {
1497 34fca9c3 2018-11-11 stsp err = got_delta_apply_in_mem(base_buf, base_bufsz,
1498 42c69117 2019-11-10 stsp delta_buf, delta_len, accum_buf,
1499 34fca9c3 2018-11-11 stsp &accum_size, max_size);
1502 42c69117 2019-11-10 stsp err = got_delta_apply(base_file, delta_buf,
1503 42c69117 2019-11-10 stsp delta_len,
1504 8628c62d 2018-03-15 stsp /* Final delta application writes to output file. */
1505 b29656e2 2018-03-16 stsp ++n < deltas->nentries ? accum_file : outfile,
1506 b29656e2 2018-03-16 stsp &accum_size);
1508 ab2f42e7 2019-11-10 stsp if (!cached)
1509 ab2f42e7 2019-11-10 stsp free(delta_buf);
1511 6691714a 2018-01-23 stsp goto done;
1513 710bb5ca 2018-01-23 stsp if (n < deltas->nentries) {
1514 6691714a 2018-01-23 stsp /* Accumulated delta becomes the new base. */
1515 8628c62d 2018-03-15 stsp if (base_buf) {
1516 8628c62d 2018-03-15 stsp uint8_t *tmp = accum_buf;
1517 6395114c 2022-05-31 stsp size_t tmp_size = accum_bufsz;
1518 8628c62d 2018-03-15 stsp accum_buf = base_buf;
1519 6395114c 2022-05-31 stsp accum_bufsz = base_bufsz;
1520 8628c62d 2018-03-15 stsp base_buf = tmp;
1521 6395114c 2022-05-31 stsp base_bufsz = tmp_size;
1523 8628c62d 2018-03-15 stsp FILE *tmp = accum_file;
1524 8628c62d 2018-03-15 stsp accum_file = base_file;
1525 8628c62d 2018-03-15 stsp base_file = tmp;
1526 8628c62d 2018-03-15 stsp rewind(base_file);
1527 8628c62d 2018-03-15 stsp rewind(accum_file);
1533 8628c62d 2018-03-15 stsp free(base_buf);
1534 8628c62d 2018-03-15 stsp if (accum_buf) {
1535 8628c62d 2018-03-15 stsp size_t len = fwrite(accum_buf, 1, accum_size, outfile);
1536 8628c62d 2018-03-15 stsp free(accum_buf);
1537 8628c62d 2018-03-15 stsp if (len != accum_size)
1538 673702af 2018-07-23 stsp err = got_ferror(outfile, GOT_ERR_IO);
1540 6691714a 2018-01-23 stsp rewind(outfile);
1541 b29656e2 2018-03-16 stsp if (err == NULL)
1542 b29656e2 2018-03-16 stsp *result_size = accum_size;
1543 e0ab43e7 2018-03-16 stsp return err;
1546 668a20f6 2020-03-18 stsp const struct got_error *
1547 668a20f6 2020-03-18 stsp got_pack_dump_delta_chain_to_mem(uint8_t **outbuf, size_t *outlen,
1548 48095039 2018-09-09 stsp struct got_delta_chain *deltas, struct got_pack *pack)
1550 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1551 e0ab43e7 2018-03-16 stsp struct got_delta *delta;
1552 aabb25f8 2022-10-17 stsp uint8_t *base_buf = NULL, *accum_buf = NULL;
1553 f18c433a 2022-05-31 stsp size_t base_bufsz = 0, accum_bufsz = 0, accum_size = 0, delta_len;
1554 f18c433a 2022-05-31 stsp uint64_t max_size = 0;
1555 e0ab43e7 2018-03-16 stsp int n = 0;
1557 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1558 e0ab43e7 2018-03-16 stsp *outlen = 0;
1560 dbdddfee 2021-06-23 naddy if (STAILQ_EMPTY(&deltas->entries))
1561 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
1563 e0ab43e7 2018-03-16 stsp /* Deltas are ordered in ascending order. */
1564 dbdddfee 2021-06-23 naddy STAILQ_FOREACH(delta, &deltas->entries, entry) {
1565 aabb25f8 2022-10-17 stsp uint8_t *delta_buf = NULL;
1566 f18c433a 2022-05-31 stsp uint64_t base_size, result_size = 0;
1567 ab2f42e7 2019-11-10 stsp int cached = 1;
1568 e0ab43e7 2018-03-16 stsp if (n == 0) {
1569 0c048b15 2018-04-27 stsp size_t delta_data_offset;
1571 e0ab43e7 2018-03-16 stsp /* Plain object types are the delta base. */
1572 e0ab43e7 2018-03-16 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1573 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1574 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1575 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1576 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1577 72eb3431 2018-04-01 stsp goto done;
1580 0c048b15 2018-04-27 stsp delta_data_offset = delta->offset + delta->tslen;
1581 0c048b15 2018-04-27 stsp if (delta_data_offset >= pack->filesize) {
1582 0c048b15 2018-04-27 stsp err = got_error(GOT_ERR_PACK_OFFSET);
1583 0c048b15 2018-04-27 stsp goto done;
1586 f18c433a 2022-05-31 stsp if (delta->size > max_size)
1587 f18c433a 2022-05-31 stsp max_size = delta->size;
1589 d7464085 2018-07-09 stsp if (pack->map) {
1590 d7464085 2018-07-09 stsp size_t mapoff = (size_t)delta_data_offset;
1591 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&base_buf,
1592 2e5a6fad 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->map,
1593 2e5a6fad 2020-03-18 stsp mapoff, pack->filesize - mapoff);
1595 d7464085 2018-07-09 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET)
1597 638f9024 2019-05-13 stsp err = got_error_from_errno("lseek");
1598 d7464085 2018-07-09 stsp goto done;
1600 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&base_buf,
1601 55fdd257 2020-03-18 stsp &base_bufsz, NULL, NULL, max_size,
1602 55fdd257 2020-03-18 stsp pack->fd);
1605 d7464085 2018-07-09 stsp goto done;
1610 aabb25f8 2022-10-17 stsp if (pack->delta_cache) {
1611 aabb25f8 2022-10-17 stsp got_delta_cache_get(&delta_buf, &delta_len,
1612 aabb25f8 2022-10-17 stsp pack->delta_cache, delta->data_offset);
1614 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1615 ab2f42e7 2019-11-10 stsp cached = 0;
1616 2d9e6abf 2022-05-04 stsp err = read_delta_data(&delta_buf, &delta_len, NULL,
1617 ab2f42e7 2019-11-10 stsp delta->data_offset, pack);
1619 ab2f42e7 2019-11-10 stsp goto done;
1621 aabb25f8 2022-10-17 stsp if (pack->delta_cache && !cached) {
1622 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1623 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1624 ab2f42e7 2019-11-10 stsp if (err == NULL)
1625 ab2f42e7 2019-11-10 stsp cached = 1;
1626 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1627 ab2f42e7 2019-11-10 stsp free(delta_buf);
1628 ab2f42e7 2019-11-10 stsp goto done;
1632 f18c433a 2022-05-31 stsp err = got_delta_get_sizes(&base_size, &result_size,
1633 f18c433a 2022-05-31 stsp delta_buf, delta_len);
1635 f18c433a 2022-05-31 stsp goto done;
1636 f18c433a 2022-05-31 stsp if (base_size > max_size)
1637 f18c433a 2022-05-31 stsp max_size = base_size;
1638 f18c433a 2022-05-31 stsp if (result_size > max_size)
1639 f18c433a 2022-05-31 stsp max_size = result_size;
1641 f18c433a 2022-05-31 stsp if (max_size > base_bufsz) {
1642 f18c433a 2022-05-31 stsp uint8_t *p = realloc(base_buf, max_size);
1643 f18c433a 2022-05-31 stsp if (p == NULL) {
1644 f18c433a 2022-05-31 stsp err = got_error_from_errno("realloc");
1645 f18c433a 2022-05-31 stsp goto done;
1647 f18c433a 2022-05-31 stsp base_buf = p;
1648 f18c433a 2022-05-31 stsp base_bufsz = max_size;
1651 f18c433a 2022-05-31 stsp if (max_size > accum_bufsz) {
1652 f18c433a 2022-05-31 stsp uint8_t *p = realloc(accum_buf, max_size);
1653 f18c433a 2022-05-31 stsp if (p == NULL) {
1654 f18c433a 2022-05-31 stsp err = got_error_from_errno("realloc");
1655 f18c433a 2022-05-31 stsp goto done;
1657 f18c433a 2022-05-31 stsp accum_buf = p;
1658 f18c433a 2022-05-31 stsp accum_bufsz = max_size;
1661 34fca9c3 2018-11-11 stsp err = got_delta_apply_in_mem(base_buf, base_bufsz,
1662 42c69117 2019-11-10 stsp delta_buf, delta_len, accum_buf,
1663 34fca9c3 2018-11-11 stsp &accum_size, max_size);
1664 ab2f42e7 2019-11-10 stsp if (!cached)
1665 ab2f42e7 2019-11-10 stsp free(delta_buf);
1668 e0ab43e7 2018-03-16 stsp goto done;
1670 e0ab43e7 2018-03-16 stsp if (n < deltas->nentries) {
1671 e0ab43e7 2018-03-16 stsp /* Accumulated delta becomes the new base. */
1672 e0ab43e7 2018-03-16 stsp uint8_t *tmp = accum_buf;
1673 f18c433a 2022-05-31 stsp size_t tmp_size = accum_bufsz;
1674 e0ab43e7 2018-03-16 stsp accum_buf = base_buf;
1675 f18c433a 2022-05-31 stsp accum_bufsz = base_bufsz;
1676 e0ab43e7 2018-03-16 stsp base_buf = tmp;
1677 f18c433a 2022-05-31 stsp base_bufsz = tmp_size;
1682 e0ab43e7 2018-03-16 stsp free(base_buf);
1683 e0ab43e7 2018-03-16 stsp if (err) {
1684 e0ab43e7 2018-03-16 stsp free(accum_buf);
1685 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1686 e0ab43e7 2018-03-16 stsp *outlen = 0;
1688 e0ab43e7 2018-03-16 stsp *outbuf = accum_buf;
1689 e0ab43e7 2018-03-16 stsp *outlen = accum_size;
1691 efd2a263 2018-01-19 stsp return err;
1694 3ee5fc21 2018-01-17 stsp const struct got_error *
1695 24140570 2018-09-09 stsp got_packfile_extract_object(struct got_pack *pack, struct got_object *obj,
1696 3840f4c9 2018-09-12 stsp FILE *outfile, FILE *base_file, FILE *accum_file)
1698 3ee5fc21 2018-01-17 stsp const struct got_error *err = NULL;
1700 3ee5fc21 2018-01-17 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1701 3ee5fc21 2018-01-17 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1703 ef2bccd9 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1704 24140570 2018-09-09 stsp if (obj->pack_offset >= pack->filesize)
1705 24140570 2018-09-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1707 d7464085 2018-07-09 stsp if (pack->map) {
1708 d7464085 2018-07-09 stsp size_t mapoff = (size_t)obj->pack_offset;
1709 4788f1ce 2020-03-18 stsp err = got_inflate_to_file_mmap(&obj->size, NULL, NULL,
1710 4788f1ce 2020-03-18 stsp pack->map, mapoff, pack->filesize - mapoff,
1713 24140570 2018-09-09 stsp if (lseek(pack->fd, obj->pack_offset, SEEK_SET) == -1)
1714 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
1715 4788f1ce 2020-03-18 stsp err = got_inflate_to_file_fd(&obj->size, NULL, NULL,
1716 4788f1ce 2020-03-18 stsp pack->fd, outfile);
1719 4788f1ce 2020-03-18 stsp err = got_pack_dump_delta_chain_to_file(&obj->size,
1720 4788f1ce 2020-03-18 stsp &obj->deltas, pack, outfile, base_file, accum_file);
1722 a1fd68d8 2018-01-12 stsp return err;
1725 e0ab43e7 2018-03-16 stsp const struct got_error *
1726 e0ab43e7 2018-03-16 stsp got_packfile_extract_object_to_mem(uint8_t **buf, size_t *len,
1727 7e212e3d 2018-09-09 stsp struct got_object *obj, struct got_pack *pack)
1729 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1731 e0ab43e7 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1732 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1734 48095039 2018-09-09 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1735 7e212e3d 2018-09-09 stsp if (obj->pack_offset >= pack->filesize)
1736 7e212e3d 2018-09-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1737 d7464085 2018-07-09 stsp if (pack->map) {
1738 d7464085 2018-07-09 stsp size_t mapoff = (size_t)obj->pack_offset;
1739 2e5a6fad 2020-03-18 stsp err = got_inflate_to_mem_mmap(buf, len, NULL, NULL,
1740 2e5a6fad 2020-03-18 stsp pack->map, mapoff, pack->filesize - mapoff);
1742 7e212e3d 2018-09-09 stsp if (lseek(pack->fd, obj->pack_offset, SEEK_SET) == -1)
1743 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
1744 1e87a3c3 2020-03-18 stsp err = got_inflate_to_mem_fd(buf, len, NULL, NULL,
1745 55fdd257 2020-03-18 stsp obj->size, pack->fd);
1748 668a20f6 2020-03-18 stsp err = got_pack_dump_delta_chain_to_mem(buf, len, &obj->deltas,
1751 e0ab43e7 2018-03-16 stsp return err;
1754 2d9e6abf 2022-05-04 stsp static const struct got_error *
1755 2d9e6abf 2022-05-04 stsp read_raw_delta_data(uint8_t **delta_buf, size_t *delta_len,
1756 2d9e6abf 2022-05-04 stsp size_t *delta_len_compressed, uint64_t *base_size, uint64_t *result_size,
1757 2d9e6abf 2022-05-04 stsp off_t delta_data_offset, struct got_pack *pack, struct got_packidx *packidx)
1759 2d9e6abf 2022-05-04 stsp const struct got_error *err = NULL;
1761 2d9e6abf 2022-05-04 stsp /* Validate decompression and obtain the decompressed size. */
1762 2d9e6abf 2022-05-04 stsp err = read_delta_data(delta_buf, delta_len, delta_len_compressed,
1763 2d9e6abf 2022-05-04 stsp delta_data_offset, pack);
1765 2d9e6abf 2022-05-04 stsp return err;
1767 2d9e6abf 2022-05-04 stsp /* Read delta base/result sizes from head of delta stream. */
1768 2d9e6abf 2022-05-04 stsp err = got_delta_get_sizes(base_size, result_size,
1769 2d9e6abf 2022-05-04 stsp *delta_buf, *delta_len);
1771 2d9e6abf 2022-05-04 stsp goto done;
1773 2d9e6abf 2022-05-04 stsp /* Discard decompressed delta and read it again in compressed form. */
1774 2d9e6abf 2022-05-04 stsp free(*delta_buf);
1775 2d9e6abf 2022-05-04 stsp *delta_buf = malloc(*delta_len_compressed);
1776 2d9e6abf 2022-05-04 stsp if (*delta_buf == NULL) {
1777 2d9e6abf 2022-05-04 stsp err = got_error_from_errno("malloc");
1778 2d9e6abf 2022-05-04 stsp goto done;
1780 2d9e6abf 2022-05-04 stsp if (pack->map) {
1781 2d9e6abf 2022-05-04 stsp if (delta_data_offset >= pack->filesize)
1782 2d9e6abf 2022-05-04 stsp err = got_error(GOT_ERR_PACK_OFFSET);
1783 2d9e6abf 2022-05-04 stsp memcpy(*delta_buf, pack->map + delta_data_offset,
1784 2d9e6abf 2022-05-04 stsp *delta_len_compressed);
1786 2d9e6abf 2022-05-04 stsp ssize_t n;
1787 2d9e6abf 2022-05-04 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET) == -1) {
1788 2d9e6abf 2022-05-04 stsp err = got_error_from_errno("lseek");
1789 2d9e6abf 2022-05-04 stsp goto done;
1791 2d9e6abf 2022-05-04 stsp n = read(pack->fd, *delta_buf, *delta_len_compressed);
1792 2d9e6abf 2022-05-04 stsp if (n < 0) {
1793 2d9e6abf 2022-05-04 stsp err = got_error_from_errno("read");
1794 2d9e6abf 2022-05-04 stsp goto done;
1795 2d9e6abf 2022-05-04 stsp } else if (n != *delta_len_compressed) {
1796 2d9e6abf 2022-05-04 stsp err = got_error(GOT_ERR_IO);
1797 2d9e6abf 2022-05-04 stsp goto done;
1801 2d9e6abf 2022-05-04 stsp if (err) {
1802 2d9e6abf 2022-05-04 stsp free(*delta_buf);
1803 2d9e6abf 2022-05-04 stsp *delta_buf = NULL;
1804 2d9e6abf 2022-05-04 stsp *delta_len = 0;
1805 2d9e6abf 2022-05-04 stsp *delta_len_compressed = 0;
1806 2d9e6abf 2022-05-04 stsp *base_size = 0;
1807 2d9e6abf 2022-05-04 stsp *result_size = 0;
1809 2d9e6abf 2022-05-04 stsp return err;
1812 67fd6849 2022-02-13 stsp const struct got_error *
1813 67fd6849 2022-02-13 stsp got_packfile_extract_raw_delta(uint8_t **delta_buf, size_t *delta_size,
1814 2d9e6abf 2022-05-04 stsp size_t *delta_compressed_size, off_t *delta_offset, off_t *base_offset,
1815 2d9e6abf 2022-05-04 stsp struct got_object_id *base_id, uint64_t *base_size, uint64_t *result_size,
1816 2d9e6abf 2022-05-04 stsp struct got_pack *pack, struct got_packidx *packidx, int idx)
1818 67fd6849 2022-02-13 stsp const struct got_error *err = NULL;
1819 67fd6849 2022-02-13 stsp off_t offset;
1820 67fd6849 2022-02-13 stsp uint8_t type;
1821 67fd6849 2022-02-13 stsp uint64_t size;
1822 67fd6849 2022-02-13 stsp size_t tslen, delta_hdrlen;
1823 2d9e6abf 2022-05-04 stsp off_t delta_data_offset;
1825 67fd6849 2022-02-13 stsp *delta_buf = NULL;
1826 67fd6849 2022-02-13 stsp *delta_size = 0;
1827 2d9e6abf 2022-05-04 stsp *delta_compressed_size = 0;
1828 67fd6849 2022-02-13 stsp *delta_offset = 0;
1829 67fd6849 2022-02-13 stsp *base_offset = 0;
1830 67fd6849 2022-02-13 stsp *base_size = 0;
1831 67fd6849 2022-02-13 stsp *result_size = 0;
1833 67fd6849 2022-02-13 stsp offset = got_packidx_get_object_offset(packidx, idx);
1834 04aed155 2022-07-24 naddy if (offset == -1)
1835 67fd6849 2022-02-13 stsp return got_error(GOT_ERR_BAD_PACKIDX);
1837 67fd6849 2022-02-13 stsp if (offset >= pack->filesize)
1838 67fd6849 2022-02-13 stsp return got_error(GOT_ERR_PACK_OFFSET);
1840 67fd6849 2022-02-13 stsp err = got_pack_parse_object_type_and_size(&type, &size, &tslen,
1841 67fd6849 2022-02-13 stsp pack, offset);
1843 67fd6849 2022-02-13 stsp return err;
1845 67fd6849 2022-02-13 stsp if (tslen + size < tslen || offset + size < size ||
1846 67fd6849 2022-02-13 stsp tslen + offset < tslen)
1847 67fd6849 2022-02-13 stsp return got_error(GOT_ERR_PACK_OFFSET);
1849 67fd6849 2022-02-13 stsp switch (type) {
1850 67fd6849 2022-02-13 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
1851 67fd6849 2022-02-13 stsp err = got_pack_parse_offset_delta(base_offset, &delta_hdrlen,
1852 67fd6849 2022-02-13 stsp pack, offset, tslen);
1854 67fd6849 2022-02-13 stsp return err;
1856 67fd6849 2022-02-13 stsp case GOT_OBJ_TYPE_REF_DELTA:
1857 67fd6849 2022-02-13 stsp err = got_pack_parse_ref_delta(base_id, pack, offset, tslen);
1859 67fd6849 2022-02-13 stsp return err;
1860 67fd6849 2022-02-13 stsp delta_hdrlen = SHA1_DIGEST_LENGTH;
1863 67fd6849 2022-02-13 stsp return got_error_fmt(GOT_ERR_OBJ_TYPE,
1864 04aed155 2022-07-24 naddy "non-delta object type %d found at offset %lld",
1865 04aed155 2022-07-24 naddy type, (long long)offset);
1868 67fd6849 2022-02-13 stsp if (tslen + delta_hdrlen < delta_hdrlen ||
1869 67fd6849 2022-02-13 stsp offset + delta_hdrlen < delta_hdrlen)
1870 67fd6849 2022-02-13 stsp return got_error(GOT_ERR_BAD_DELTA);
1872 2d9e6abf 2022-05-04 stsp delta_data_offset = offset + tslen + delta_hdrlen;
1873 2d9e6abf 2022-05-04 stsp err = read_raw_delta_data(delta_buf, delta_size, delta_compressed_size,
1874 2d9e6abf 2022-05-04 stsp base_size, result_size, delta_data_offset, pack, packidx);
1876 67fd6849 2022-02-13 stsp return err;
1878 67fd6849 2022-02-13 stsp if (*delta_size != size) {
1879 67fd6849 2022-02-13 stsp err = got_error(GOT_ERR_BAD_DELTA);
1880 67fd6849 2022-02-13 stsp goto done;
1883 67fd6849 2022-02-13 stsp *delta_offset = offset;
1885 67fd6849 2022-02-13 stsp if (err) {
1886 67fd6849 2022-02-13 stsp free(*delta_buf);
1887 67fd6849 2022-02-13 stsp *delta_buf = NULL;
1888 2d9e6abf 2022-05-04 stsp *delta_size = 0;
1889 2d9e6abf 2022-05-04 stsp *delta_compressed_size = 0;
1890 2d9e6abf 2022-05-04 stsp *delta_offset = 0;
1891 2d9e6abf 2022-05-04 stsp *base_offset = 0;
1892 2d9e6abf 2022-05-04 stsp *base_size = 0;
1893 2d9e6abf 2022-05-04 stsp *result_size = 0;
1895 67fd6849 2022-02-13 stsp return err;
