2 0a0a3048 2018-01-10 stsp * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
4 0a0a3048 2018-01-10 stsp * Permission to use, copy, modify, and distribute this software for any
5 0a0a3048 2018-01-10 stsp * purpose with or without fee is hereby granted, provided that the above
6 0a0a3048 2018-01-10 stsp * copyright notice and this permission notice appear in all copies.
8 0a0a3048 2018-01-10 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 0a0a3048 2018-01-10 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 0a0a3048 2018-01-10 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 0a0a3048 2018-01-10 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 0a0a3048 2018-01-10 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 0a0a3048 2018-01-10 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 0a0a3048 2018-01-10 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 a1fd68d8 2018-01-12 stsp #include <sys/types.h>
18 0a0a3048 2018-01-10 stsp #include <sys/stat.h>
19 a1fd68d8 2018-01-12 stsp #include <sys/queue.h>
20 876c234b 2018-09-10 stsp #include <sys/uio.h>
21 57b35b75 2018-06-22 stsp #include <sys/mman.h>
23 7e656b93 2018-03-17 stsp #include <fcntl.h>
24 a1fd68d8 2018-01-12 stsp #include <errno.h>
25 0a0a3048 2018-01-10 stsp #include <stdio.h>
26 a1fd68d8 2018-01-12 stsp #include <stdint.h>
27 0a0a3048 2018-01-10 stsp #include <stdlib.h>
28 0a0a3048 2018-01-10 stsp #include <string.h>
29 0a0a3048 2018-01-10 stsp #include <limits.h>
30 0a0a3048 2018-01-10 stsp #include <sha1.h>
31 0a0a3048 2018-01-10 stsp #include <endian.h>
32 a1fd68d8 2018-01-12 stsp #include <zlib.h>
33 876c234b 2018-09-10 stsp #include <imsg.h>
35 0a0a3048 2018-01-10 stsp #include "got_error.h"
36 a1fd68d8 2018-01-12 stsp #include "got_object.h"
37 511a516b 2018-05-19 stsp #include "got_opentemp.h"
39 718b3ab0 2018-03-17 stsp #include "got_lib_sha1.h"
40 718b3ab0 2018-03-17 stsp #include "got_lib_pack.h"
41 718b3ab0 2018-03-17 stsp #include "got_lib_path.h"
42 718b3ab0 2018-03-17 stsp #include "got_lib_delta.h"
43 63581804 2018-07-09 stsp #include "got_lib_inflate.h"
44 718b3ab0 2018-03-17 stsp #include "got_lib_object.h"
45 876c234b 2018-09-10 stsp #include "got_lib_privsep.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 1510f469 2018-09-09 stsp got_pack_get_packfile_size(size_t *size, const char *path)
71 0a0a3048 2018-01-10 stsp struct stat sb;
76 1c7e24f1 2018-04-02 stsp dot = strrchr(path, '.');
77 0a0a3048 2018-01-10 stsp if (dot == NULL)
78 0a0a3048 2018-01-10 stsp return got_error(GOT_ERR_BAD_PATH);
80 1c7e24f1 2018-04-02 stsp /* Path must point to a pack index or to a pack file. */
81 72fb0363 2018-06-04 stsp if (strcmp(dot, GOT_PACKIDX_SUFFIX) == 0) {
82 97128b57 2018-04-02 stsp const struct got_error *err = NULL;
83 1c7e24f1 2018-04-02 stsp char *path_pack;
84 1c7e24f1 2018-04-02 stsp char base_path[PATH_MAX];
86 1c7e24f1 2018-04-02 stsp /* Convert pack index path to pack file path. */
87 1c7e24f1 2018-04-02 stsp if (strlcpy(base_path, path, PATH_MAX) > PATH_MAX)
88 1c7e24f1 2018-04-02 stsp return got_error(GOT_ERR_NO_SPACE);
89 1c7e24f1 2018-04-02 stsp dot = strrchr(base_path, '.');
90 1c7e24f1 2018-04-02 stsp if (dot == NULL)
91 1c7e24f1 2018-04-02 stsp return got_error(GOT_ERR_BAD_PATH);
92 1c7e24f1 2018-04-02 stsp *dot = '\0';
93 1c7e24f1 2018-04-02 stsp if (asprintf(&path_pack, "%s.pack", base_path) == -1)
94 1c7e24f1 2018-04-02 stsp return got_error_from_errno();
96 97128b57 2018-04-02 stsp if (stat(path_pack, &sb) != 0)
97 97128b57 2018-04-02 stsp err = got_error_from_errno();
98 0a0a3048 2018-01-10 stsp free(path_pack);
100 97128b57 2018-04-02 stsp return err;
101 56cca8e5 2018-06-04 stsp } else if (strcmp(dot, GOT_PACKFILE_SUFFIX) == 0) {
102 1c7e24f1 2018-04-02 stsp if (stat(path, &sb) != 0)
103 1c7e24f1 2018-04-02 stsp return got_error_from_errno();
105 1c7e24f1 2018-04-02 stsp return got_error(GOT_ERR_BAD_PATH);
107 0a0a3048 2018-01-10 stsp *size = sb.st_size;
111 0a0a3048 2018-01-10 stsp const struct got_error *
112 817c5a18 2018-09-09 stsp got_packidx_init_hdr(struct got_packidx *p, int verify)
114 0a0a3048 2018-01-10 stsp const struct got_error *err = NULL;
115 817c5a18 2018-09-09 stsp struct got_packidx_v2_hdr *h;
116 0ebaf008 2018-01-10 stsp SHA1_CTX ctx;
117 0ebaf008 2018-01-10 stsp uint8_t sha1[SHA1_DIGEST_LENGTH];
118 817c5a18 2018-09-09 stsp size_t nobj, len_fanout, len_ids, offset, remain;
121 0ebaf008 2018-01-10 stsp SHA1Init(&ctx);
123 57b35b75 2018-06-22 stsp h = &p->hdr;
124 57b35b75 2018-06-22 stsp offset = 0;
125 57b35b75 2018-06-22 stsp remain = p->len;
127 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->magic)) {
128 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
131 fc79a48d 2018-07-09 stsp if (p->map)
132 fc79a48d 2018-07-09 stsp h->magic = (uint32_t *)(p->map + offset);
134 fc79a48d 2018-07-09 stsp h->magic = malloc(sizeof(*h->magic));
135 fc79a48d 2018-07-09 stsp if (h->magic == NULL) {
136 fc79a48d 2018-07-09 stsp err = got_error_from_errno();
139 fc79a48d 2018-07-09 stsp n = read(p->fd, h->magic, sizeof(*h->magic));
140 fc79a48d 2018-07-09 stsp if (n != sizeof(*h->magic)) {
141 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
145 57b35b75 2018-06-22 stsp if (betoh32(*h->magic) != GOT_PACKIDX_V2_MAGIC) {
146 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
149 57b35b75 2018-06-22 stsp offset += sizeof(*h->magic);
150 57b35b75 2018-06-22 stsp remain -= sizeof(*h->magic);
152 0cb74cf4 2018-07-08 stsp if (verify)
153 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->magic, sizeof(*h->magic));
155 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->version)) {
156 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
159 fc79a48d 2018-07-09 stsp if (p->map)
160 fc79a48d 2018-07-09 stsp h->version = (uint32_t *)(p->map + offset);
162 fc79a48d 2018-07-09 stsp h->version = malloc(sizeof(*h->version));
163 fc79a48d 2018-07-09 stsp if (h->version == NULL) {
164 fc79a48d 2018-07-09 stsp err = got_error_from_errno();
167 fc79a48d 2018-07-09 stsp n = read(p->fd, h->version, sizeof(*h->version));
168 fc79a48d 2018-07-09 stsp if (n != sizeof(*h->version)) {
169 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
173 57b35b75 2018-06-22 stsp if (betoh32(*h->version) != GOT_PACKIDX_VERSION) {
174 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
177 57b35b75 2018-06-22 stsp offset += sizeof(*h->version);
178 57b35b75 2018-06-22 stsp remain -= sizeof(*h->version);
180 0cb74cf4 2018-07-08 stsp if (verify)
181 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->version, sizeof(*h->version));
183 57b35b75 2018-06-22 stsp len_fanout =
184 57b35b75 2018-06-22 stsp sizeof(*h->fanout_table) * GOT_PACKIDX_V2_FANOUT_TABLE_ITEMS;
185 57b35b75 2018-06-22 stsp if (remain < len_fanout) {
186 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
189 fc79a48d 2018-07-09 stsp if (p->map)
190 fc79a48d 2018-07-09 stsp h->fanout_table = (uint32_t *)(p->map + offset);
192 fc79a48d 2018-07-09 stsp h->fanout_table = malloc(len_fanout);
193 fc79a48d 2018-07-09 stsp if (h->fanout_table == NULL) {
194 fc79a48d 2018-07-09 stsp err = got_error_from_errno();
197 fc79a48d 2018-07-09 stsp n = read(p->fd, h->fanout_table, len_fanout);
198 fc79a48d 2018-07-09 stsp if (n != len_fanout) {
199 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
203 c8262310 2018-06-04 stsp err = verify_fanout_table(h->fanout_table);
206 0cb74cf4 2018-07-08 stsp if (verify)
207 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->fanout_table, len_fanout);
208 57b35b75 2018-06-22 stsp offset += len_fanout;
209 57b35b75 2018-06-22 stsp remain -= len_fanout;
211 c8262310 2018-06-04 stsp nobj = betoh32(h->fanout_table[0xff]);
212 57b35b75 2018-06-22 stsp len_ids = nobj * sizeof(*h->sorted_ids);
213 57b35b75 2018-06-22 stsp if (len_ids <= nobj || len_ids > remain) {
214 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
217 fc79a48d 2018-07-09 stsp if (p->map)
218 fc79a48d 2018-07-09 stsp h->sorted_ids =
219 fc79a48d 2018-07-09 stsp (struct got_packidx_object_id *)((uint8_t*)(p->map + offset));
221 fc79a48d 2018-07-09 stsp h->sorted_ids = malloc(len_ids);
222 fc79a48d 2018-07-09 stsp if (h->sorted_ids == NULL) {
223 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
226 fc79a48d 2018-07-09 stsp n = read(p->fd, h->sorted_ids, len_ids);
227 fc79a48d 2018-07-09 stsp if (n != len_ids) {
228 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
232 0cb74cf4 2018-07-08 stsp if (verify)
233 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->sorted_ids, len_ids);
234 57b35b75 2018-06-22 stsp offset += len_ids;
235 57b35b75 2018-06-22 stsp remain -= len_ids;
237 57b35b75 2018-06-22 stsp if (remain < nobj * sizeof(*h->crc32)) {
238 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
241 fc79a48d 2018-07-09 stsp if (p->map)
242 fc79a48d 2018-07-09 stsp h->crc32 = (uint32_t *)((uint8_t*)(p->map + offset));
244 fc79a48d 2018-07-09 stsp h->crc32 = malloc(nobj * sizeof(*h->crc32));
245 fc79a48d 2018-07-09 stsp if (h->crc32 == NULL) {
246 fc79a48d 2018-07-09 stsp err = got_error_from_errno();
249 fc79a48d 2018-07-09 stsp n = read(p->fd, h->crc32, nobj * sizeof(*h->crc32));
250 fc79a48d 2018-07-09 stsp if (n != nobj * sizeof(*h->crc32)) {
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->crc32, nobj * sizeof(*h->crc32));
257 57b35b75 2018-06-22 stsp remain -= nobj * sizeof(*h->crc32);
258 57b35b75 2018-06-22 stsp offset += nobj * sizeof(*h->crc32);
260 57b35b75 2018-06-22 stsp if (remain < nobj * sizeof(*h->offsets)) {
261 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
264 fc79a48d 2018-07-09 stsp if (p->map)
265 fc79a48d 2018-07-09 stsp h->offsets = (uint32_t *)((uint8_t*)(p->map + offset));
267 fc79a48d 2018-07-09 stsp h->offsets = malloc(nobj * sizeof(*h->offsets));
268 fc79a48d 2018-07-09 stsp if (h->offsets == NULL) {
269 fc79a48d 2018-07-09 stsp err = got_error_from_errno();
272 fc79a48d 2018-07-09 stsp n = read(p->fd, h->offsets, nobj * sizeof(*h->offsets));
273 fc79a48d 2018-07-09 stsp if (n != nobj * sizeof(*h->offsets)) {
274 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
278 0cb74cf4 2018-07-08 stsp if (verify)
279 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->offsets,
280 0cb74cf4 2018-07-08 stsp nobj * sizeof(*h->offsets));
281 57b35b75 2018-06-22 stsp remain -= nobj * sizeof(*h->offsets);
282 57b35b75 2018-06-22 stsp offset += nobj * sizeof(*h->offsets);
284 0a0a3048 2018-01-10 stsp /* Large file offsets are contained only in files > 2GB. */
285 57b35b75 2018-06-22 stsp if (p->len <= 0x80000000)
286 0a0a3048 2018-01-10 stsp goto checksum;
288 57b35b75 2018-06-22 stsp if (remain < nobj * sizeof(*h->large_offsets)) {
289 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
292 fc79a48d 2018-07-09 stsp if (p->map)
293 fc79a48d 2018-07-09 stsp h->large_offsets = (uint64_t *)((uint8_t*)(p->map + offset));
295 fc79a48d 2018-07-09 stsp h->offsets = malloc(nobj * sizeof(*h->large_offsets));
296 fc79a48d 2018-07-09 stsp if (h->offsets == NULL) {
297 fc79a48d 2018-07-09 stsp err = got_error_from_errno();
300 fc79a48d 2018-07-09 stsp n = read(p->fd, h->large_offsets,
301 fc79a48d 2018-07-09 stsp nobj * sizeof(*h->large_offsets));
302 fc79a48d 2018-07-09 stsp if (n != nobj * sizeof(*h->large_offsets)) {
303 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
307 0cb74cf4 2018-07-08 stsp if (verify)
308 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t*)h->large_offsets,
309 0cb74cf4 2018-07-08 stsp nobj * sizeof(*h->large_offsets));
310 57b35b75 2018-06-22 stsp remain -= nobj * sizeof(*h->large_offsets);
311 57b35b75 2018-06-22 stsp offset += nobj * sizeof(*h->large_offsets);
314 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->trailer)) {
315 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
318 fc79a48d 2018-07-09 stsp if (p->map)
319 fc79a48d 2018-07-09 stsp h->trailer =
320 fc79a48d 2018-07-09 stsp (struct got_packidx_trailer *)((uint8_t*)(p->map + offset));
322 fc79a48d 2018-07-09 stsp h->trailer = malloc(sizeof(*h->trailer));
323 fc79a48d 2018-07-09 stsp if (h->trailer == NULL) {
324 fc79a48d 2018-07-09 stsp err = got_error_from_errno();
327 fc79a48d 2018-07-09 stsp n = read(p->fd, h->trailer, sizeof(*h->trailer));
328 fc79a48d 2018-07-09 stsp if (n != sizeof(*h->trailer)) {
329 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
333 0cb74cf4 2018-07-08 stsp if (verify) {
334 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, h->trailer->packfile_sha1, SHA1_DIGEST_LENGTH);
335 0cb74cf4 2018-07-08 stsp SHA1Final(sha1, &ctx);
336 0cb74cf4 2018-07-08 stsp if (memcmp(h->trailer->packidx_sha1, sha1,
337 0cb74cf4 2018-07-08 stsp SHA1_DIGEST_LENGTH) != 0)
338 0cb74cf4 2018-07-08 stsp err = got_error(GOT_ERR_PACKIDX_CSUM);
341 817c5a18 2018-09-09 stsp return err;
344 817c5a18 2018-09-09 stsp const struct got_error *
345 817c5a18 2018-09-09 stsp got_packidx_open(struct got_packidx **packidx, const char *path, int verify)
347 817c5a18 2018-09-09 stsp const struct got_error *err = NULL;
348 817c5a18 2018-09-09 stsp struct got_packidx *p;
350 817c5a18 2018-09-09 stsp *packidx = NULL;
352 817c5a18 2018-09-09 stsp p = calloc(1, sizeof(*p));
353 817c5a18 2018-09-09 stsp if (p == NULL)
354 817c5a18 2018-09-09 stsp return got_error_from_errno();
356 817c5a18 2018-09-09 stsp p->fd = open(path, O_RDONLY | O_NOFOLLOW, GOT_DEFAULT_FILE_MODE);
357 817c5a18 2018-09-09 stsp if (p->fd == -1)
358 817c5a18 2018-09-09 stsp return got_error_from_errno();
360 1510f469 2018-09-09 stsp err = got_pack_get_packfile_size(&p->len, path);
362 817c5a18 2018-09-09 stsp close(p->fd);
364 817c5a18 2018-09-09 stsp return err;
366 817c5a18 2018-09-09 stsp if (p->len < sizeof(p->hdr)) {
367 817c5a18 2018-09-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
368 817c5a18 2018-09-09 stsp close(p->fd);
370 817c5a18 2018-09-09 stsp return err;
373 817c5a18 2018-09-09 stsp p->path_packidx = strdup(path);
374 817c5a18 2018-09-09 stsp if (p->path_packidx == NULL) {
375 817c5a18 2018-09-09 stsp err = got_error_from_errno();
379 817c5a18 2018-09-09 stsp #ifndef GOT_PACK_NO_MMAP
380 817c5a18 2018-09-09 stsp p->map = mmap(NULL, p->len, PROT_READ, MAP_PRIVATE, p->fd, 0);
381 817c5a18 2018-09-09 stsp if (p->map == MAP_FAILED)
382 817c5a18 2018-09-09 stsp p->map = NULL; /* fall back to read(2) */
385 817c5a18 2018-09-09 stsp err = got_packidx_init_hdr(p, verify);
388 0a0a3048 2018-01-10 stsp got_packidx_close(p);
390 0a0a3048 2018-01-10 stsp *packidx = p;
392 0a0a3048 2018-01-10 stsp return err;
395 57b35b75 2018-06-22 stsp const struct got_error *
396 6fd11751 2018-06-04 stsp got_packidx_close(struct got_packidx *packidx)
398 57b35b75 2018-06-22 stsp const struct got_error *err = NULL;
400 6fd11751 2018-06-04 stsp free(packidx->path_packidx);
401 fc79a48d 2018-07-09 stsp if (packidx->map) {
402 57b35b75 2018-06-22 stsp if (munmap(packidx->map, packidx->len) == -1)
403 57b35b75 2018-06-22 stsp err = got_error_from_errno();
405 fc79a48d 2018-07-09 stsp free(packidx->hdr.magic);
406 fc79a48d 2018-07-09 stsp free(packidx->hdr.version);
407 fc79a48d 2018-07-09 stsp free(packidx->hdr.fanout_table);
408 fc79a48d 2018-07-09 stsp free(packidx->hdr.sorted_ids);
409 fc79a48d 2018-07-09 stsp free(packidx->hdr.crc32);
410 fc79a48d 2018-07-09 stsp free(packidx->hdr.offsets);
411 fc79a48d 2018-07-09 stsp free(packidx->hdr.large_offsets);
412 fc79a48d 2018-07-09 stsp free(packidx->hdr.trailer);
414 57b35b75 2018-06-22 stsp close(packidx->fd);
415 0a0a3048 2018-01-10 stsp free(packidx);
417 57b35b75 2018-06-22 stsp return err;
420 a1fd68d8 2018-01-12 stsp static off_t
421 6fd11751 2018-06-04 stsp get_object_offset(struct got_packidx *packidx, int idx)
423 6fd11751 2018-06-04 stsp uint32_t totobj = betoh32(packidx->hdr.fanout_table[0xff]);
424 6fd11751 2018-06-04 stsp uint32_t offset = betoh32(packidx->hdr.offsets[idx]);
425 a1fd68d8 2018-01-12 stsp if (offset & GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX) {
426 a1fd68d8 2018-01-12 stsp uint64_t loffset;
427 a1fd68d8 2018-01-12 stsp idx = offset & GOT_PACKIDX_OFFSET_VAL_MASK;
428 6fd11751 2018-06-04 stsp if (idx < 0 || idx > totobj ||
429 6fd11751 2018-06-04 stsp packidx->hdr.large_offsets == NULL)
431 6fd11751 2018-06-04 stsp loffset = betoh64(packidx->hdr.large_offsets[idx]);
432 a1fd68d8 2018-01-12 stsp return (loffset > INT64_MAX ? -1 : (off_t)loffset);
434 a1fd68d8 2018-01-12 stsp return (off_t)(offset & GOT_PACKIDX_OFFSET_VAL_MASK);
438 1510f469 2018-09-09 stsp got_packidx_get_object_idx(struct got_packidx *packidx, struct got_object_id *id)
440 a1fd68d8 2018-01-12 stsp u_int8_t id0 = id->sha1[0];
441 6fd11751 2018-06-04 stsp uint32_t totobj = betoh32(packidx->hdr.fanout_table[0xff]);
442 40aeb19c 2018-06-22 stsp int left = 0, right = totobj - 1;
444 a1fd68d8 2018-01-12 stsp if (id0 > 0)
445 40aeb19c 2018-06-22 stsp left = betoh32(packidx->hdr.fanout_table[id0 - 1]);
447 40aeb19c 2018-06-22 stsp while (left <= right) {
448 57b35b75 2018-06-22 stsp struct got_packidx_object_id *oid;
449 40aeb19c 2018-06-22 stsp int i, cmp;
451 40aeb19c 2018-06-22 stsp i = ((left + right) / 2);
452 40aeb19c 2018-06-22 stsp oid = &packidx->hdr.sorted_ids[i];
453 57b35b75 2018-06-22 stsp cmp = memcmp(id->sha1, oid->sha1, SHA1_DIGEST_LENGTH);
454 16dcbf91 2018-04-01 stsp if (cmp == 0)
456 40aeb19c 2018-06-22 stsp else if (cmp > 0)
457 40aeb19c 2018-06-22 stsp left = i + 1;
458 40aeb19c 2018-06-22 stsp else if (cmp < 0)
459 40aeb19c 2018-06-22 stsp right = i - 1;
465 876c234b 2018-09-10 stsp const struct got_error *
466 876c234b 2018-09-10 stsp got_pack_stop_privsep_child(struct got_pack *pack)
468 876c234b 2018-09-10 stsp const struct got_error *err = NULL, *child_err = NULL;
470 876c234b 2018-09-10 stsp if (pack->privsep_child == NULL)
471 876c234b 2018-09-10 stsp return NULL;
473 876c234b 2018-09-10 stsp err = got_privsep_send_stop(pack->privsep_child->imsg_fd);
474 876c234b 2018-09-10 stsp child_err = got_privsep_wait_for_child(
475 876c234b 2018-09-10 stsp pack->privsep_child->pid);
476 876c234b 2018-09-10 stsp if (child_err && err == NULL)
477 876c234b 2018-09-10 stsp err = child_err;
478 876c234b 2018-09-10 stsp free(pack->privsep_child);
479 876c234b 2018-09-10 stsp pack->privsep_child = NULL;
480 876c234b 2018-09-10 stsp return err;
483 d7464085 2018-07-09 stsp const struct got_error *
484 7e656b93 2018-03-17 stsp got_pack_close(struct got_pack *pack)
486 d7464085 2018-07-09 stsp const struct got_error *err = NULL;
488 876c234b 2018-09-10 stsp err = got_pack_stop_privsep_child(pack);
489 876c234b 2018-09-10 stsp if (pack->map && munmap(pack->map, pack->filesize) == -1 && !err)
490 d7464085 2018-07-09 stsp err = got_error_from_errno();
491 8b2180d4 2018-04-26 stsp close(pack->fd);
492 8b2180d4 2018-04-26 stsp pack->fd = -1;
493 4589e373 2018-03-17 stsp free(pack->path_packfile);
494 4589e373 2018-03-17 stsp pack->path_packfile = NULL;
495 4589e373 2018-03-17 stsp pack->filesize = 0;
497 c7fe698a 2018-01-23 stsp return err;
500 c7fe698a 2018-01-23 stsp static const struct got_error *
501 d7464085 2018-07-09 stsp parse_object_type_and_size(uint8_t *type, uint64_t *size, size_t *len,
502 d7464085 2018-07-09 stsp struct got_pack *pack, off_t offset)
504 a487c1d0 2018-01-14 stsp uint8_t t = 0;
505 a487c1d0 2018-01-14 stsp uint64_t s = 0;
506 a487c1d0 2018-01-14 stsp uint8_t sizeN;
507 d7464085 2018-07-09 stsp size_t mapoff = 0;
512 d7464085 2018-07-09 stsp if (offset >= pack->filesize)
513 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
515 d7464085 2018-07-09 stsp if (pack->map) {
516 d7464085 2018-07-09 stsp mapoff = (size_t)offset;
518 d7464085 2018-07-09 stsp if (lseek(pack->fd, offset, SEEK_SET) == -1)
519 d7464085 2018-07-09 stsp return got_error_from_errno();
523 a1fd68d8 2018-01-12 stsp /* We do not support size values which don't fit in 64 bit. */
525 a487c1d0 2018-01-14 stsp return got_error(GOT_ERR_NO_SPACE);
527 d7464085 2018-07-09 stsp if (pack->map) {
528 d7464085 2018-07-09 stsp sizeN = *(pack->map + mapoff);
529 d7464085 2018-07-09 stsp mapoff += sizeof(sizeN);
531 d7464085 2018-07-09 stsp ssize_t n = read(pack->fd, &sizeN, sizeof(sizeN));
533 d7464085 2018-07-09 stsp return got_error_from_errno();
534 d7464085 2018-07-09 stsp if (n != sizeof(sizeN))
535 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
537 d7464085 2018-07-09 stsp *len += sizeof(sizeN);
539 a1fd68d8 2018-01-12 stsp if (i == 0) {
540 a487c1d0 2018-01-14 stsp t = (sizeN & GOT_PACK_OBJ_SIZE0_TYPE_MASK) >>
541 a1fd68d8 2018-01-12 stsp GOT_PACK_OBJ_SIZE0_TYPE_MASK_SHIFT;
542 a487c1d0 2018-01-14 stsp s = (sizeN & GOT_PACK_OBJ_SIZE0_VAL_MASK);
544 a1fd68d8 2018-01-12 stsp size_t shift = 4 + 7 * (i - 1);
545 a487c1d0 2018-01-14 stsp s |= ((sizeN & GOT_PACK_OBJ_SIZE_VAL_MASK) << shift);
548 a1fd68d8 2018-01-12 stsp } while (sizeN & GOT_PACK_OBJ_SIZE_MORE);
552 a487c1d0 2018-01-14 stsp return NULL;
555 a1fd68d8 2018-01-12 stsp static const struct got_error *
556 9710aac2 2018-01-19 stsp open_plain_object(struct got_object **obj, const char *path_packfile,
557 c59b3346 2018-09-11 stsp struct got_object_id *id, uint8_t type, off_t offset, size_t size, int idx)
559 6ccb713b 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
560 6ccb713b 2018-01-19 stsp if (*obj == NULL)
561 0a585a0d 2018-03-17 stsp return got_error_from_errno();
563 6ccb713b 2018-01-19 stsp (*obj)->path_packfile = strdup(path_packfile);
564 6ccb713b 2018-01-19 stsp if ((*obj)->path_packfile == NULL) {
565 0a585a0d 2018-03-17 stsp const struct got_error *err = got_error_from_errno();
566 6ccb713b 2018-01-19 stsp free(*obj);
567 6ccb713b 2018-01-19 stsp *obj = NULL;
568 0a585a0d 2018-03-17 stsp return err;
571 6ccb713b 2018-01-19 stsp (*obj)->type = type;
572 6ccb713b 2018-01-19 stsp (*obj)->flags = GOT_OBJ_FLAG_PACKED;
573 c59b3346 2018-09-11 stsp (*obj)->pack_idx = idx;
574 6ccb713b 2018-01-19 stsp (*obj)->hdrlen = 0;
575 6ccb713b 2018-01-19 stsp (*obj)->size = size;
577 876c234b 2018-09-10 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
578 6ccb713b 2018-01-19 stsp (*obj)->pack_offset = offset;
580 b107e67f 2018-01-19 stsp return NULL;
583 b107e67f 2018-01-19 stsp static const struct got_error *
584 d7464085 2018-07-09 stsp parse_negative_offset(int64_t *offset, size_t *len, struct got_pack *pack,
585 d7464085 2018-07-09 stsp off_t delta_offset)
587 b107e67f 2018-01-19 stsp int64_t o = 0;
588 b107e67f 2018-01-19 stsp uint8_t offN;
594 b107e67f 2018-01-19 stsp /* We do not support offset values which don't fit in 64 bit. */
596 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_NO_SPACE);
598 d7464085 2018-07-09 stsp if (pack->map) {
599 d7464085 2018-07-09 stsp size_t mapoff;
600 d7464085 2018-07-09 stsp if (delta_offset >= pack->filesize)
601 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
602 d7464085 2018-07-09 stsp mapoff = (size_t)delta_offset + *len;
603 d7464085 2018-07-09 stsp offN = *(pack->map + mapoff);
606 d7464085 2018-07-09 stsp n = read(pack->fd, &offN, sizeof(offN));
608 d7464085 2018-07-09 stsp return got_error_from_errno();
609 d7464085 2018-07-09 stsp if (n != sizeof(offN))
610 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
612 d7464085 2018-07-09 stsp *len += sizeof(offN);
614 b107e67f 2018-01-19 stsp if (i == 0)
615 b107e67f 2018-01-19 stsp o = (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
619 cecc778e 2018-01-23 stsp o += (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
622 b107e67f 2018-01-19 stsp } while (offN & GOT_PACK_OBJ_DELTA_OFF_MORE);
624 b107e67f 2018-01-19 stsp *offset = o;
625 6ccb713b 2018-01-19 stsp return NULL;
628 6ccb713b 2018-01-19 stsp static const struct got_error *
629 d7464085 2018-07-09 stsp parse_offset_delta(off_t *base_offset, size_t *len, struct got_pack *pack,
630 d7464085 2018-07-09 stsp off_t offset, int tslen)
632 96f5e8b3 2018-01-23 stsp const struct got_error *err;
633 b107e67f 2018-01-19 stsp int64_t negoffset;
634 b107e67f 2018-01-19 stsp size_t negofflen;
638 d7464085 2018-07-09 stsp err = parse_negative_offset(&negoffset, &negofflen, pack,
639 d7464085 2018-07-09 stsp offset + tslen);
641 b107e67f 2018-01-19 stsp return err;
643 b107e67f 2018-01-19 stsp /* Compute the base object's offset (must be in the same pack file). */
644 96f5e8b3 2018-01-23 stsp *base_offset = (offset - negoffset);
645 96f5e8b3 2018-01-23 stsp if (*base_offset <= 0)
646 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_BAD_PACKFILE);
648 d7464085 2018-07-09 stsp *len = negofflen;
649 96f5e8b3 2018-01-23 stsp return NULL;
652 0e22967e 2018-02-11 stsp static const struct got_error *
653 c8ecd499 2018-09-09 stsp resolve_delta_chain(struct got_delta_chain *, struct got_packidx *,
654 c8ecd499 2018-09-09 stsp struct got_pack *, off_t, size_t, int, size_t, unsigned int);
656 96f5e8b3 2018-01-23 stsp static const struct got_error *
657 c336f889 2018-07-23 stsp add_delta(struct got_delta_chain *deltas, off_t delta_offset, size_t tslen,
658 c336f889 2018-07-23 stsp int delta_type, size_t delta_size, size_t delta_data_offset,
659 c336f889 2018-07-23 stsp uint8_t *delta_buf, size_t delta_len)
661 bdd2fbb3 2018-02-11 stsp struct got_delta *delta;
663 c336f889 2018-07-23 stsp delta = got_delta_open(delta_offset, tslen, delta_type, delta_size,
664 c336f889 2018-07-23 stsp delta_data_offset, delta_buf,
665 a53d2f13 2018-03-17 stsp delta_len);
666 bdd2fbb3 2018-02-11 stsp if (delta == NULL)
667 0a585a0d 2018-03-17 stsp return got_error_from_errno();
668 bdd2fbb3 2018-02-11 stsp /* delta is freed in got_object_close() */
669 bdd2fbb3 2018-02-11 stsp deltas->nentries++;
670 bdd2fbb3 2018-02-11 stsp SIMPLEQ_INSERT_HEAD(&deltas->entries, delta, entry);
671 bdd2fbb3 2018-02-11 stsp return NULL;
674 bdd2fbb3 2018-02-11 stsp static const struct got_error *
675 6b9c9673 2018-01-23 stsp resolve_offset_delta(struct got_delta_chain *deltas,
676 c8ecd499 2018-09-09 stsp struct got_packidx *packidx, struct got_pack *pack, off_t delta_offset,
677 c8ecd499 2018-09-09 stsp size_t tslen, int delta_type, size_t delta_size, unsigned int recursion)
680 a3500804 2018-01-23 stsp const struct got_error *err;
681 c3703302 2018-01-23 stsp off_t base_offset;
682 c3703302 2018-01-23 stsp uint8_t base_type;
683 c3703302 2018-01-23 stsp uint64_t base_size;
684 c3703302 2018-01-23 stsp size_t base_tslen;
685 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
686 a53d2f13 2018-03-17 stsp uint8_t *delta_buf;
687 d7464085 2018-07-09 stsp size_t delta_len, consumed;
689 d7464085 2018-07-09 stsp err = parse_offset_delta(&base_offset, &consumed, pack,
690 d7464085 2018-07-09 stsp delta_offset, tslen);
692 a3500804 2018-01-23 stsp return err;
694 d7464085 2018-07-09 stsp delta_data_offset = delta_offset + tslen + consumed;
695 d7464085 2018-07-09 stsp if (delta_data_offset >= pack->filesize)
696 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
698 d7464085 2018-07-09 stsp if (pack->map == NULL) {
699 d7464085 2018-07-09 stsp delta_data_offset = lseek(pack->fd, 0, SEEK_CUR);
700 d7464085 2018-07-09 stsp if (delta_data_offset == -1)
701 d7464085 2018-07-09 stsp return got_error_from_errno();
704 d7464085 2018-07-09 stsp if (pack->map) {
705 d7464085 2018-07-09 stsp size_t mapoff = (size_t)delta_data_offset;
706 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&delta_buf, &delta_len, pack->map,
707 d7464085 2018-07-09 stsp mapoff, pack->filesize - mapoff);
709 d7464085 2018-07-09 stsp return err;
712 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&delta_buf, &delta_len, pack->fd);
714 d7464085 2018-07-09 stsp return err;
717 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type, delta_size,
718 c336f889 2018-07-23 stsp delta_data_offset, delta_buf, delta_len);
722 c3703302 2018-01-23 stsp /* An offset delta must be in the same packfile. */
723 ab3ad429 2018-07-23 stsp if (base_offset >= pack->filesize) {
724 ab3ad429 2018-07-23 stsp err = got_error(GOT_ERR_PACK_OFFSET);
728 348f621c 2018-01-23 stsp err = parse_object_type_and_size(&base_type, &base_size, &base_tslen,
729 d7464085 2018-07-09 stsp pack, base_offset);
733 c8ecd499 2018-09-09 stsp err = resolve_delta_chain(deltas, packidx, pack, base_offset,
734 b0e2201a 2018-06-22 stsp base_tslen, base_type, base_size, recursion - 1);
737 ab3ad429 2018-07-23 stsp free(delta_buf);
738 ab3ad429 2018-07-23 stsp return err;
741 c3703302 2018-01-23 stsp static const struct got_error *
742 c8ecd499 2018-09-09 stsp resolve_ref_delta(struct got_delta_chain *deltas, struct got_packidx *packidx,
743 c8ecd499 2018-09-09 stsp struct got_pack *pack, off_t delta_offset, size_t tslen, int delta_type,
744 c8ecd499 2018-09-09 stsp size_t delta_size, unsigned int recursion)
746 6b9c9673 2018-01-23 stsp const struct got_error *err;
747 6b9c9673 2018-01-23 stsp struct got_object_id id;
749 6b9c9673 2018-01-23 stsp off_t base_offset;
750 6b9c9673 2018-01-23 stsp uint8_t base_type;
751 6b9c9673 2018-01-23 stsp uint64_t base_size;
752 6b9c9673 2018-01-23 stsp size_t base_tslen;
753 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
754 3efa19e7 2018-07-13 stsp uint8_t *delta_buf = NULL;
755 a53d2f13 2018-03-17 stsp size_t delta_len;
757 d7464085 2018-07-09 stsp if (delta_offset >= pack->filesize)
758 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
759 45202a8f 2018-07-11 stsp delta_data_offset = delta_offset + tslen;
760 d7464085 2018-07-09 stsp if (delta_data_offset >= pack->filesize)
761 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
763 d7464085 2018-07-09 stsp if (pack->map == NULL) {
764 d7464085 2018-07-09 stsp delta_data_offset = lseek(pack->fd, 0, SEEK_CUR);
765 d7464085 2018-07-09 stsp if (delta_data_offset == -1)
766 d7464085 2018-07-09 stsp return got_error_from_errno();
770 d7464085 2018-07-09 stsp if (pack->map) {
771 45202a8f 2018-07-11 stsp size_t mapoff = (size_t)delta_data_offset;
772 d7464085 2018-07-09 stsp memcpy(&id, pack->map + mapoff, sizeof(id));
773 d7464085 2018-07-09 stsp mapoff += sizeof(id);
774 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&delta_buf, &delta_len, pack->map,
775 45202a8f 2018-07-11 stsp mapoff, pack->filesize - mapoff);
779 d7464085 2018-07-09 stsp ssize_t n = read(pack->fd, &id, sizeof(id));
781 d7464085 2018-07-09 stsp return got_error_from_errno();
782 d7464085 2018-07-09 stsp if (n != sizeof(id))
783 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
784 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&delta_buf, &delta_len, pack->fd);
789 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type, delta_size,
790 c336f889 2018-07-23 stsp delta_data_offset, delta_buf, delta_len);
794 652b2703 2018-06-22 stsp /* Delta base must be in the same pack file. */
795 1510f469 2018-09-09 stsp idx = got_packidx_get_object_idx(packidx, &id);
796 3efa19e7 2018-07-13 stsp if (idx == -1) {
797 3efa19e7 2018-07-13 stsp err = got_error(GOT_ERR_BAD_PACKFILE);
801 6b9c9673 2018-01-23 stsp base_offset = get_object_offset(packidx, idx);
802 6b9c9673 2018-01-23 stsp if (base_offset == (uint64_t)-1) {
803 3efa19e7 2018-07-13 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
807 b0e2201a 2018-06-22 stsp if (base_offset >= pack->filesize) {
808 0c048b15 2018-04-27 stsp err = got_error(GOT_ERR_PACK_OFFSET);
812 6b9c9673 2018-01-23 stsp err = parse_object_type_and_size(&base_type, &base_size, &base_tslen,
813 d7464085 2018-07-09 stsp pack, base_offset);
817 c8ecd499 2018-09-09 stsp err = resolve_delta_chain(deltas, packidx, pack, base_offset,
818 0c048b15 2018-04-27 stsp base_tslen, base_type, base_size, recursion - 1);
821 3efa19e7 2018-07-13 stsp free(delta_buf);
822 6b9c9673 2018-01-23 stsp return err;
825 6b9c9673 2018-01-23 stsp static const struct got_error *
826 c8ecd499 2018-09-09 stsp resolve_delta_chain(struct got_delta_chain *deltas, struct got_packidx *packidx,
827 c8ecd499 2018-09-09 stsp struct got_pack *pack, off_t delta_offset, size_t tslen, int delta_type,
828 c8ecd499 2018-09-09 stsp size_t delta_size, unsigned int recursion)
830 c3703302 2018-01-23 stsp const struct got_error *err = NULL;
832 5b7e13a7 2018-04-02 stsp if (--recursion == 0)
833 5b7e13a7 2018-04-02 stsp return got_error(GOT_ERR_RECURSION);
835 c3703302 2018-01-23 stsp switch (delta_type) {
836 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_COMMIT:
837 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TREE:
838 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_BLOB:
839 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TAG:
840 c3703302 2018-01-23 stsp /* Plain types are the final delta base. Recursion ends. */
841 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type,
842 c336f889 2018-07-23 stsp delta_size, 0, NULL, 0);
844 a3500804 2018-01-23 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
845 c8ecd499 2018-09-09 stsp err = resolve_offset_delta(deltas, packidx, pack,
846 b0e2201a 2018-06-22 stsp delta_offset, tslen, delta_type, delta_size, recursion - 1);
848 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_REF_DELTA:
849 c8ecd499 2018-09-09 stsp err = resolve_ref_delta(deltas, packidx, pack,
850 b0e2201a 2018-06-22 stsp delta_offset, tslen, delta_type, delta_size, recursion - 1);
853 4810de4a 2018-04-01 stsp return got_error(GOT_ERR_OBJ_TYPE);
856 96f5e8b3 2018-01-23 stsp return err;
859 96f5e8b3 2018-01-23 stsp static const struct got_error *
860 a98c62b1 2018-09-09 stsp open_delta_object(struct got_object **obj, struct got_packidx *packidx,
861 a98c62b1 2018-09-09 stsp struct got_pack *pack, struct got_object_id *id, off_t offset,
862 c59b3346 2018-09-11 stsp size_t tslen, int delta_type, size_t delta_size, int idx)
864 96f5e8b3 2018-01-23 stsp const struct got_error *err = NULL;
865 96f5e8b3 2018-01-23 stsp int resolved_type;
867 b107e67f 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
868 b107e67f 2018-01-19 stsp if (*obj == NULL)
869 0a585a0d 2018-03-17 stsp return got_error_from_errno();
871 96f5e8b3 2018-01-23 stsp (*obj)->flags = 0;
872 b107e67f 2018-01-19 stsp (*obj)->hdrlen = 0;
873 39e73dc9 2018-03-03 stsp (*obj)->size = 0; /* Not known because deltas aren't applied yet. */
875 876c234b 2018-09-10 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
876 cecc778e 2018-01-23 stsp (*obj)->pack_offset = offset + tslen;
878 b0e2201a 2018-06-22 stsp (*obj)->path_packfile = strdup(pack->path_packfile);
879 96f5e8b3 2018-01-23 stsp if ((*obj)->path_packfile == NULL) {
880 0a585a0d 2018-03-17 stsp err = got_error_from_errno();
883 96f5e8b3 2018-01-23 stsp (*obj)->flags |= GOT_OBJ_FLAG_PACKED;
884 c59b3346 2018-09-11 stsp (*obj)->pack_idx = idx;
886 96f5e8b3 2018-01-23 stsp SIMPLEQ_INIT(&(*obj)->deltas.entries);
887 96f5e8b3 2018-01-23 stsp (*obj)->flags |= GOT_OBJ_FLAG_DELTIFIED;
889 c8ecd499 2018-09-09 stsp err = resolve_delta_chain(&(*obj)->deltas, packidx, pack, offset,
890 b0e2201a 2018-06-22 stsp tslen, delta_type, delta_size, GOT_DELTA_CHAIN_RECURSION_MAX);
894 96f5e8b3 2018-01-23 stsp err = got_delta_chain_get_base_type(&resolved_type, &(*obj)->deltas);
897 96f5e8b3 2018-01-23 stsp (*obj)->type = resolved_type;
900 96f5e8b3 2018-01-23 stsp got_object_close(*obj);
901 96f5e8b3 2018-01-23 stsp *obj = NULL;
903 96f5e8b3 2018-01-23 stsp return err;
906 2090a03d 2018-09-09 stsp const struct got_error *
907 2090a03d 2018-09-09 stsp got_packfile_open_object(struct got_object **obj, struct got_pack *pack,
908 6fd11751 2018-06-04 stsp struct got_packidx *packidx, int idx, struct got_object_id *id)
910 a1fd68d8 2018-01-12 stsp const struct got_error *err = NULL;
911 a1fd68d8 2018-01-12 stsp off_t offset;
912 6c00b545 2018-01-17 stsp uint8_t type;
913 6c00b545 2018-01-17 stsp uint64_t size;
914 3ee5fc21 2018-01-17 stsp size_t tslen;
916 6c00b545 2018-01-17 stsp *obj = NULL;
918 a1fd68d8 2018-01-12 stsp offset = get_object_offset(packidx, idx);
919 a1fd68d8 2018-01-12 stsp if (offset == (uint64_t)-1)
920 a1fd68d8 2018-01-12 stsp return got_error(GOT_ERR_BAD_PACKIDX);
922 d7464085 2018-07-09 stsp err = parse_object_type_and_size(&type, &size, &tslen, pack, offset);
924 35c73765 2018-09-09 stsp return err;
926 6c00b545 2018-01-17 stsp switch (type) {
927 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_COMMIT:
928 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_TREE:
929 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_BLOB:
930 d33fc9ef 2018-01-23 stsp case GOT_OBJ_TYPE_TAG:
931 35c73765 2018-09-09 stsp err = open_plain_object(obj, pack->path_packfile, id, type,
932 c59b3346 2018-09-11 stsp offset + tslen, size, idx);
934 b107e67f 2018-01-19 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
935 a48db7e5 2018-01-23 stsp case GOT_OBJ_TYPE_REF_DELTA:
936 a98c62b1 2018-09-09 stsp err = open_delta_object(obj, packidx, pack, id, offset,
937 c59b3346 2018-09-11 stsp tslen, type, size, idx);
940 4810de4a 2018-04-01 stsp err = got_error(GOT_ERR_OBJ_TYPE);
944 3ee5fc21 2018-01-17 stsp return err;
947 efd2a263 2018-01-19 stsp static const struct got_error *
948 40426839 2018-03-17 stsp get_delta_chain_max_size(uint64_t *max_size, struct got_delta_chain *deltas)
950 22484865 2018-03-13 stsp struct got_delta *delta;
951 22484865 2018-03-13 stsp uint64_t base_size = 0, result_size = 0;
953 22484865 2018-03-13 stsp *max_size = 0;
954 22484865 2018-03-13 stsp SIMPLEQ_FOREACH(delta, &deltas->entries, entry) {
955 22484865 2018-03-13 stsp /* Plain object types are the delta base. */
956 22484865 2018-03-13 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
957 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TREE &&
958 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
959 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TAG) {
960 22484865 2018-03-13 stsp const struct got_error *err;
961 a53d2f13 2018-03-17 stsp err = got_delta_get_sizes(&base_size, &result_size,
962 a53d2f13 2018-03-17 stsp delta->delta_buf, delta->delta_len);
964 22484865 2018-03-13 stsp return err;
966 22484865 2018-03-13 stsp base_size = delta->size;
967 22484865 2018-03-13 stsp if (base_size > *max_size)
968 22484865 2018-03-13 stsp *max_size = base_size;
969 22484865 2018-03-13 stsp if (result_size > *max_size)
970 22484865 2018-03-13 stsp *max_size = result_size;
973 9feb4ff2 2018-03-14 stsp return NULL;
976 22484865 2018-03-13 stsp static const struct got_error *
977 b29656e2 2018-03-16 stsp dump_delta_chain_to_file(size_t *result_size, struct got_delta_chain *deltas,
978 3840f4c9 2018-09-12 stsp struct got_pack *pack, FILE *outfile, FILE *base_file, FILE *accum_file)
980 efd2a263 2018-01-19 stsp const struct got_error *err = NULL;
981 6691714a 2018-01-23 stsp struct got_delta *delta;
982 8628c62d 2018-03-15 stsp uint8_t *base_buf = NULL, *accum_buf = NULL;
983 b29656e2 2018-03-16 stsp size_t accum_size = 0;
984 22484865 2018-03-13 stsp uint64_t max_size;
987 b29656e2 2018-03-16 stsp *result_size = 0;
989 710bb5ca 2018-01-23 stsp if (SIMPLEQ_EMPTY(&deltas->entries))
990 6691714a 2018-01-23 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
992 8628c62d 2018-03-15 stsp /* We process small enough files entirely in memory for speed. */
993 40426839 2018-03-17 stsp err = get_delta_chain_max_size(&max_size, deltas);
995 22484865 2018-03-13 stsp return err;
996 8628c62d 2018-03-15 stsp if (max_size < GOT_DELTA_RESULT_SIZE_CACHED_MAX) {
997 8628c62d 2018-03-15 stsp accum_buf = malloc(max_size);
998 8628c62d 2018-03-15 stsp if (accum_buf == NULL)
999 8628c62d 2018-03-15 stsp return got_error_from_errno();
1000 3840f4c9 2018-09-12 stsp base_file = NULL;
1001 3840f4c9 2018-09-12 stsp accum_file = NULL;
1004 6691714a 2018-01-23 stsp /* Deltas are ordered in ascending order. */
1005 710bb5ca 2018-01-23 stsp SIMPLEQ_FOREACH(delta, &deltas->entries, entry) {
1006 a6b158cc 2018-02-11 stsp if (n == 0) {
1007 d7464085 2018-07-09 stsp size_t base_len, mapoff;
1008 0c048b15 2018-04-27 stsp off_t delta_data_offset;
1010 a6b158cc 2018-02-11 stsp /* Plain object types are the delta base. */
1011 a6b158cc 2018-02-11 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1012 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1013 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1014 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1015 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1016 72eb3431 2018-04-01 stsp goto done;
1019 0c048b15 2018-04-27 stsp delta_data_offset = delta->offset + delta->tslen;
1020 0c048b15 2018-04-27 stsp if (delta_data_offset >= pack->filesize) {
1021 0c048b15 2018-04-27 stsp err = got_error(GOT_ERR_PACK_OFFSET);
1022 0c048b15 2018-04-27 stsp goto done;
1024 d7464085 2018-07-09 stsp if (pack->map == NULL) {
1025 d7464085 2018-07-09 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET)
1027 d7464085 2018-07-09 stsp err = got_error_from_errno();
1028 d7464085 2018-07-09 stsp goto done;
1031 d7464085 2018-07-09 stsp if (base_file) {
1032 d7464085 2018-07-09 stsp if (pack->map) {
1033 d7464085 2018-07-09 stsp mapoff = (size_t)delta_data_offset;
1034 d7464085 2018-07-09 stsp err = got_inflate_to_file_mmap(
1035 d7464085 2018-07-09 stsp &base_len, pack->map, mapoff,
1036 d7464085 2018-07-09 stsp pack->filesize - mapoff, base_file);
1038 d7464085 2018-07-09 stsp err = got_inflate_to_file_fd(&base_len,
1039 d7464085 2018-07-09 stsp pack->fd, base_file);
1041 d7464085 2018-07-09 stsp if (pack->map) {
1042 d7464085 2018-07-09 stsp mapoff = (size_t)delta_data_offset;
1043 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&base_buf,
1044 d7464085 2018-07-09 stsp &base_len, pack->map, mapoff,
1045 d7464085 2018-07-09 stsp pack->filesize - mapoff);
1047 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&base_buf,
1048 d7464085 2018-07-09 stsp &base_len, pack->fd);
1049 8628c62d 2018-03-15 stsp if (base_len < max_size) {
1050 8628c62d 2018-03-15 stsp uint8_t *p;
1051 8628c62d 2018-03-15 stsp p = reallocarray(base_buf, 1, max_size);
1052 8628c62d 2018-03-15 stsp if (p == NULL) {
1053 0a585a0d 2018-03-17 stsp err = got_error_from_errno();
1054 8628c62d 2018-03-15 stsp goto done;
1056 8628c62d 2018-03-15 stsp base_buf = p;
1060 a6b158cc 2018-02-11 stsp goto done;
1062 8628c62d 2018-03-15 stsp if (base_file)
1063 8628c62d 2018-03-15 stsp rewind(base_file);
1067 8628c62d 2018-03-15 stsp if (base_buf) {
1068 a53d2f13 2018-03-17 stsp err = got_delta_apply_in_mem(base_buf, delta->delta_buf,
1069 a53d2f13 2018-03-17 stsp delta->delta_len, accum_buf, &accum_size);
1072 a53d2f13 2018-03-17 stsp err = got_delta_apply(base_file, delta->delta_buf,
1073 a53d2f13 2018-03-17 stsp delta->delta_len,
1074 8628c62d 2018-03-15 stsp /* Final delta application writes to output file. */
1075 b29656e2 2018-03-16 stsp ++n < deltas->nentries ? accum_file : outfile,
1076 b29656e2 2018-03-16 stsp &accum_size);
1079 6691714a 2018-01-23 stsp goto done;
1081 710bb5ca 2018-01-23 stsp if (n < deltas->nentries) {
1082 6691714a 2018-01-23 stsp /* Accumulated delta becomes the new base. */
1083 8628c62d 2018-03-15 stsp if (base_buf) {
1084 8628c62d 2018-03-15 stsp uint8_t *tmp = accum_buf;
1085 8628c62d 2018-03-15 stsp accum_buf = base_buf;
1086 8628c62d 2018-03-15 stsp base_buf = tmp;
1088 8628c62d 2018-03-15 stsp FILE *tmp = accum_file;
1089 8628c62d 2018-03-15 stsp accum_file = base_file;
1090 8628c62d 2018-03-15 stsp base_file = tmp;
1091 8628c62d 2018-03-15 stsp rewind(base_file);
1092 8628c62d 2018-03-15 stsp rewind(accum_file);
1098 8628c62d 2018-03-15 stsp free(base_buf);
1099 8628c62d 2018-03-15 stsp if (accum_buf) {
1100 8628c62d 2018-03-15 stsp size_t len = fwrite(accum_buf, 1, accum_size, outfile);
1101 8628c62d 2018-03-15 stsp free(accum_buf);
1102 8628c62d 2018-03-15 stsp if (len != accum_size)
1103 673702af 2018-07-23 stsp err = got_ferror(outfile, GOT_ERR_IO);
1105 8628c62d 2018-03-15 stsp if (base_file)
1106 8628c62d 2018-03-15 stsp fclose(base_file);
1107 8628c62d 2018-03-15 stsp if (accum_file)
1108 8628c62d 2018-03-15 stsp fclose(accum_file);
1109 6691714a 2018-01-23 stsp rewind(outfile);
1110 b29656e2 2018-03-16 stsp if (err == NULL)
1111 b29656e2 2018-03-16 stsp *result_size = accum_size;
1112 e0ab43e7 2018-03-16 stsp return err;
1115 e0ab43e7 2018-03-16 stsp static const struct got_error *
1116 e0ab43e7 2018-03-16 stsp dump_delta_chain_to_mem(uint8_t **outbuf, size_t *outlen,
1117 48095039 2018-09-09 stsp struct got_delta_chain *deltas, struct got_pack *pack)
1119 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1120 e0ab43e7 2018-03-16 stsp struct got_delta *delta;
1121 e0ab43e7 2018-03-16 stsp uint8_t *base_buf = NULL, *accum_buf = NULL;
1122 e0ab43e7 2018-03-16 stsp size_t accum_size;
1123 e0ab43e7 2018-03-16 stsp uint64_t max_size;
1124 e0ab43e7 2018-03-16 stsp int n = 0;
1126 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1127 e0ab43e7 2018-03-16 stsp *outlen = 0;
1129 e0ab43e7 2018-03-16 stsp if (SIMPLEQ_EMPTY(&deltas->entries))
1130 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
1132 40426839 2018-03-17 stsp err = get_delta_chain_max_size(&max_size, deltas);
1134 e0ab43e7 2018-03-16 stsp return err;
1135 e0ab43e7 2018-03-16 stsp accum_buf = malloc(max_size);
1136 e0ab43e7 2018-03-16 stsp if (accum_buf == NULL)
1137 0a585a0d 2018-03-17 stsp return got_error_from_errno();
1139 e0ab43e7 2018-03-16 stsp /* Deltas are ordered in ascending order. */
1140 e0ab43e7 2018-03-16 stsp SIMPLEQ_FOREACH(delta, &deltas->entries, entry) {
1141 e0ab43e7 2018-03-16 stsp if (n == 0) {
1142 e0ab43e7 2018-03-16 stsp size_t base_len;
1143 0c048b15 2018-04-27 stsp size_t delta_data_offset;
1145 e0ab43e7 2018-03-16 stsp /* Plain object types are the delta base. */
1146 e0ab43e7 2018-03-16 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1147 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1148 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1149 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1150 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1151 72eb3431 2018-04-01 stsp goto done;
1154 0c048b15 2018-04-27 stsp delta_data_offset = delta->offset + delta->tslen;
1155 0c048b15 2018-04-27 stsp if (delta_data_offset >= pack->filesize) {
1156 0c048b15 2018-04-27 stsp err = got_error(GOT_ERR_PACK_OFFSET);
1157 0c048b15 2018-04-27 stsp goto done;
1159 d7464085 2018-07-09 stsp if (pack->map) {
1160 d7464085 2018-07-09 stsp size_t mapoff = (size_t)delta_data_offset;
1161 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&base_buf,
1162 d7464085 2018-07-09 stsp &base_len, pack->map, mapoff,
1163 d7464085 2018-07-09 stsp pack->filesize - mapoff);
1165 d7464085 2018-07-09 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET)
1167 d7464085 2018-07-09 stsp err = got_error_from_errno();
1168 d7464085 2018-07-09 stsp goto done;
1170 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&base_buf,
1171 d7464085 2018-07-09 stsp &base_len, pack->fd);
1174 d7464085 2018-07-09 stsp goto done;
1175 e0ab43e7 2018-03-16 stsp if (base_len < max_size) {
1176 e0ab43e7 2018-03-16 stsp uint8_t *p;
1177 e0ab43e7 2018-03-16 stsp p = reallocarray(base_buf, 1, max_size);
1178 e0ab43e7 2018-03-16 stsp if (p == NULL) {
1179 0a585a0d 2018-03-17 stsp err = got_error_from_errno();
1180 e0ab43e7 2018-03-16 stsp goto done;
1182 e0ab43e7 2018-03-16 stsp base_buf = p;
1188 a53d2f13 2018-03-17 stsp err = got_delta_apply_in_mem(base_buf, delta->delta_buf,
1189 a53d2f13 2018-03-17 stsp delta->delta_len, accum_buf, &accum_size);
1192 e0ab43e7 2018-03-16 stsp goto done;
1194 e0ab43e7 2018-03-16 stsp if (n < deltas->nentries) {
1195 e0ab43e7 2018-03-16 stsp /* Accumulated delta becomes the new base. */
1196 e0ab43e7 2018-03-16 stsp uint8_t *tmp = accum_buf;
1197 e0ab43e7 2018-03-16 stsp accum_buf = base_buf;
1198 e0ab43e7 2018-03-16 stsp base_buf = tmp;
1203 e0ab43e7 2018-03-16 stsp free(base_buf);
1204 e0ab43e7 2018-03-16 stsp if (err) {
1205 e0ab43e7 2018-03-16 stsp free(accum_buf);
1206 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1207 e0ab43e7 2018-03-16 stsp *outlen = 0;
1209 e0ab43e7 2018-03-16 stsp *outbuf = accum_buf;
1210 e0ab43e7 2018-03-16 stsp *outlen = accum_size;
1212 efd2a263 2018-01-19 stsp return err;
1215 3ee5fc21 2018-01-17 stsp const struct got_error *
1216 24140570 2018-09-09 stsp got_packfile_extract_object(struct got_pack *pack, struct got_object *obj,
1217 3840f4c9 2018-09-12 stsp FILE *outfile, FILE *base_file, FILE *accum_file)
1219 3ee5fc21 2018-01-17 stsp const struct got_error *err = NULL;
1221 3ee5fc21 2018-01-17 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1222 3ee5fc21 2018-01-17 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1224 ef2bccd9 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1225 24140570 2018-09-09 stsp if (obj->pack_offset >= pack->filesize)
1226 24140570 2018-09-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1228 d7464085 2018-07-09 stsp if (pack->map) {
1229 d7464085 2018-07-09 stsp size_t mapoff = (size_t)obj->pack_offset;
1230 d7464085 2018-07-09 stsp err = got_inflate_to_file_mmap(&obj->size, pack->map,
1231 24140570 2018-09-09 stsp mapoff, pack->filesize - mapoff, outfile);
1233 24140570 2018-09-09 stsp if (lseek(pack->fd, obj->pack_offset, SEEK_SET) == -1)
1234 24140570 2018-09-09 stsp return got_error_from_errno();
1235 24140570 2018-09-09 stsp err = got_inflate_to_file_fd(&obj->size, pack->fd,
1239 2ce68b2f 2018-09-09 stsp err = dump_delta_chain_to_file(&obj->size, &obj->deltas, pack,
1240 3840f4c9 2018-09-12 stsp outfile, base_file, accum_file);
1242 a1fd68d8 2018-01-12 stsp return err;
1245 e0ab43e7 2018-03-16 stsp const struct got_error *
1246 e0ab43e7 2018-03-16 stsp got_packfile_extract_object_to_mem(uint8_t **buf, size_t *len,
1247 7e212e3d 2018-09-09 stsp struct got_object *obj, struct got_pack *pack)
1249 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1251 e0ab43e7 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1252 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1254 48095039 2018-09-09 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1255 7e212e3d 2018-09-09 stsp if (obj->pack_offset >= pack->filesize)
1256 7e212e3d 2018-09-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1257 d7464085 2018-07-09 stsp if (pack->map) {
1258 d7464085 2018-07-09 stsp size_t mapoff = (size_t)obj->pack_offset;
1259 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(buf, len, pack->map,
1260 d7464085 2018-07-09 stsp mapoff, pack->filesize - mapoff);
1262 7e212e3d 2018-09-09 stsp if (lseek(pack->fd, obj->pack_offset, SEEK_SET) == -1)
1263 7e212e3d 2018-09-09 stsp return got_error_from_errno();
1264 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(buf, len, pack->fd);
1267 48095039 2018-09-09 stsp err = dump_delta_chain_to_mem(buf, len, &obj->deltas, pack);
1269 e0ab43e7 2018-03-16 stsp return err;
