2 5aa81393 2020-01-06 stsp * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org>
4 0a0a3048 2018-01-10 stsp * Permission to use, copy, modify, and distribute this software for any
5 0a0a3048 2018-01-10 stsp * purpose with or without fee is hereby granted, provided that the above
6 0a0a3048 2018-01-10 stsp * copyright notice and this permission notice appear in all copies.
8 0a0a3048 2018-01-10 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 0a0a3048 2018-01-10 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 0a0a3048 2018-01-10 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 0a0a3048 2018-01-10 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 0a0a3048 2018-01-10 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 0a0a3048 2018-01-10 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 0a0a3048 2018-01-10 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 a1fd68d8 2018-01-12 stsp #include <sys/types.h>
18 0a0a3048 2018-01-10 stsp #include <sys/stat.h>
19 a1fd68d8 2018-01-12 stsp #include <sys/queue.h>
20 876c234b 2018-09-10 stsp #include <sys/uio.h>
21 57b35b75 2018-06-22 stsp #include <sys/mman.h>
23 7e656b93 2018-03-17 stsp #include <fcntl.h>
24 a1fd68d8 2018-01-12 stsp #include <errno.h>
25 0a0a3048 2018-01-10 stsp #include <stdio.h>
26 a1fd68d8 2018-01-12 stsp #include <stdint.h>
27 0a0a3048 2018-01-10 stsp #include <stdlib.h>
28 0a0a3048 2018-01-10 stsp #include <string.h>
29 0a0a3048 2018-01-10 stsp #include <limits.h>
30 0a0a3048 2018-01-10 stsp #include <sha1.h>
31 0a0a3048 2018-01-10 stsp #include <endian.h>
32 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"
38 324d37e7 2019-05-11 stsp #include "got_path.h"
40 718b3ab0 2018-03-17 stsp #include "got_lib_sha1.h"
41 718b3ab0 2018-03-17 stsp #include "got_lib_delta.h"
42 ab2f42e7 2019-11-10 stsp #include "got_lib_delta_cache.h"
43 63581804 2018-07-09 stsp #include "got_lib_inflate.h"
44 718b3ab0 2018-03-17 stsp #include "got_lib_object.h"
45 dd88155e 2019-06-29 stsp #include "got_lib_object_parse.h"
46 876c234b 2018-09-10 stsp #include "got_lib_privsep.h"
47 15a94983 2018-12-23 stsp #include "got_lib_pack.h"
49 79b11c62 2018-03-09 stsp #ifndef nitems
50 79b11c62 2018-03-09 stsp #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
54 a1fd68d8 2018-01-12 stsp #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
57 0a0a3048 2018-01-10 stsp static const struct got_error *
58 0a0a3048 2018-01-10 stsp verify_fanout_table(uint32_t *fanout_table)
62 0a0a3048 2018-01-10 stsp for (i = 0; i < 0xff - 1; i++) {
63 a1fd68d8 2018-01-12 stsp if (be32toh(fanout_table[i]) > be32toh(fanout_table[i + 1]))
64 0a0a3048 2018-01-10 stsp return got_error(GOT_ERR_BAD_PACKIDX);
67 0a0a3048 2018-01-10 stsp return NULL;
70 1510f469 2018-09-09 stsp const struct got_error *
71 817c5a18 2018-09-09 stsp got_packidx_init_hdr(struct got_packidx *p, int verify)
73 0a0a3048 2018-01-10 stsp const struct got_error *err = NULL;
74 817c5a18 2018-09-09 stsp struct got_packidx_v2_hdr *h;
75 0ebaf008 2018-01-10 stsp SHA1_CTX ctx;
76 0ebaf008 2018-01-10 stsp uint8_t sha1[SHA1_DIGEST_LENGTH];
77 817c5a18 2018-09-09 stsp size_t nobj, len_fanout, len_ids, offset, remain;
81 0ebaf008 2018-01-10 stsp SHA1Init(&ctx);
83 57b35b75 2018-06-22 stsp h = &p->hdr;
85 57b35b75 2018-06-22 stsp remain = p->len;
87 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->magic)) {
88 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
92 fc79a48d 2018-07-09 stsp h->magic = (uint32_t *)(p->map + offset);
94 fc79a48d 2018-07-09 stsp h->magic = malloc(sizeof(*h->magic));
95 fc79a48d 2018-07-09 stsp if (h->magic == NULL) {
96 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
99 fc79a48d 2018-07-09 stsp n = read(p->fd, h->magic, sizeof(*h->magic));
100 b1317e77 2019-09-22 stsp if (n < 0) {
101 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
103 b1317e77 2019-09-22 stsp } else if (n != sizeof(*h->magic)) {
104 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
108 57b35b75 2018-06-22 stsp if (betoh32(*h->magic) != GOT_PACKIDX_V2_MAGIC) {
109 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
112 57b35b75 2018-06-22 stsp offset += sizeof(*h->magic);
113 57b35b75 2018-06-22 stsp remain -= sizeof(*h->magic);
115 0cb74cf4 2018-07-08 stsp if (verify)
116 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->magic, sizeof(*h->magic));
118 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->version)) {
119 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
122 fc79a48d 2018-07-09 stsp if (p->map)
123 fc79a48d 2018-07-09 stsp h->version = (uint32_t *)(p->map + offset);
125 fc79a48d 2018-07-09 stsp h->version = malloc(sizeof(*h->version));
126 fc79a48d 2018-07-09 stsp if (h->version == NULL) {
127 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
130 fc79a48d 2018-07-09 stsp n = read(p->fd, h->version, sizeof(*h->version));
131 c6368c2e 2019-10-11 stsp if (n < 0) {
132 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
134 c6368c2e 2019-10-11 stsp } else if (n != sizeof(*h->version)) {
135 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
139 57b35b75 2018-06-22 stsp if (betoh32(*h->version) != GOT_PACKIDX_VERSION) {
140 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
143 57b35b75 2018-06-22 stsp offset += sizeof(*h->version);
144 57b35b75 2018-06-22 stsp remain -= sizeof(*h->version);
146 0cb74cf4 2018-07-08 stsp if (verify)
147 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->version, sizeof(*h->version));
149 57b35b75 2018-06-22 stsp len_fanout =
150 57b35b75 2018-06-22 stsp sizeof(*h->fanout_table) * GOT_PACKIDX_V2_FANOUT_TABLE_ITEMS;
151 57b35b75 2018-06-22 stsp if (remain < len_fanout) {
152 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
155 fc79a48d 2018-07-09 stsp if (p->map)
156 fc79a48d 2018-07-09 stsp h->fanout_table = (uint32_t *)(p->map + offset);
158 fc79a48d 2018-07-09 stsp h->fanout_table = malloc(len_fanout);
159 fc79a48d 2018-07-09 stsp if (h->fanout_table == NULL) {
160 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
163 fc79a48d 2018-07-09 stsp n = read(p->fd, h->fanout_table, len_fanout);
164 c6368c2e 2019-10-11 stsp if (n < 0) {
165 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
167 c6368c2e 2019-10-11 stsp } else if (n != len_fanout) {
168 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
172 c8262310 2018-06-04 stsp err = verify_fanout_table(h->fanout_table);
175 0cb74cf4 2018-07-08 stsp if (verify)
176 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->fanout_table, len_fanout);
177 57b35b75 2018-06-22 stsp offset += len_fanout;
178 57b35b75 2018-06-22 stsp remain -= len_fanout;
180 c8262310 2018-06-04 stsp nobj = betoh32(h->fanout_table[0xff]);
181 57b35b75 2018-06-22 stsp len_ids = nobj * sizeof(*h->sorted_ids);
182 57b35b75 2018-06-22 stsp if (len_ids <= nobj || len_ids > remain) {
183 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
186 fc79a48d 2018-07-09 stsp if (p->map)
187 fc79a48d 2018-07-09 stsp h->sorted_ids =
188 fc79a48d 2018-07-09 stsp (struct got_packidx_object_id *)((uint8_t*)(p->map + offset));
190 fc79a48d 2018-07-09 stsp h->sorted_ids = malloc(len_ids);
191 fc79a48d 2018-07-09 stsp if (h->sorted_ids == NULL) {
192 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
195 fc79a48d 2018-07-09 stsp n = read(p->fd, h->sorted_ids, len_ids);
197 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
198 faaa1c0f 2018-09-15 stsp else if (n != len_ids) {
199 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
203 0cb74cf4 2018-07-08 stsp if (verify)
204 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->sorted_ids, len_ids);
205 57b35b75 2018-06-22 stsp offset += len_ids;
206 57b35b75 2018-06-22 stsp remain -= len_ids;
208 57b35b75 2018-06-22 stsp if (remain < nobj * sizeof(*h->crc32)) {
209 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
212 fc79a48d 2018-07-09 stsp if (p->map)
213 fc79a48d 2018-07-09 stsp h->crc32 = (uint32_t *)((uint8_t*)(p->map + offset));
215 fc79a48d 2018-07-09 stsp h->crc32 = malloc(nobj * sizeof(*h->crc32));
216 fc79a48d 2018-07-09 stsp if (h->crc32 == NULL) {
217 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
220 fc79a48d 2018-07-09 stsp n = read(p->fd, h->crc32, nobj * sizeof(*h->crc32));
222 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
223 faaa1c0f 2018-09-15 stsp else if (n != nobj * sizeof(*h->crc32)) {
224 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
228 0cb74cf4 2018-07-08 stsp if (verify)
229 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->crc32, nobj * sizeof(*h->crc32));
230 57b35b75 2018-06-22 stsp remain -= nobj * sizeof(*h->crc32);
231 57b35b75 2018-06-22 stsp offset += nobj * sizeof(*h->crc32);
233 57b35b75 2018-06-22 stsp if (remain < nobj * sizeof(*h->offsets)) {
234 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
237 fc79a48d 2018-07-09 stsp if (p->map)
238 fc79a48d 2018-07-09 stsp h->offsets = (uint32_t *)((uint8_t*)(p->map + offset));
240 fc79a48d 2018-07-09 stsp h->offsets = malloc(nobj * sizeof(*h->offsets));
241 fc79a48d 2018-07-09 stsp if (h->offsets == NULL) {
242 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
245 fc79a48d 2018-07-09 stsp n = read(p->fd, h->offsets, nobj * sizeof(*h->offsets));
247 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
248 faaa1c0f 2018-09-15 stsp else if (n != nobj * sizeof(*h->offsets)) {
249 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
253 0cb74cf4 2018-07-08 stsp if (verify)
254 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->offsets,
255 0cb74cf4 2018-07-08 stsp nobj * sizeof(*h->offsets));
256 57b35b75 2018-06-22 stsp remain -= nobj * sizeof(*h->offsets);
257 57b35b75 2018-06-22 stsp offset += nobj * sizeof(*h->offsets);
259 0a0a3048 2018-01-10 stsp /* Large file offsets are contained only in files > 2GB. */
260 5e6be232 2019-11-08 stsp for (i = 0; i < nobj; i++) {
261 5e6be232 2019-11-08 stsp uint32_t o = betoh32(h->offsets[i]);
262 5e6be232 2019-11-08 stsp if (o & GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX)
263 5e6be232 2019-11-08 stsp p->nlargeobj++;
265 5e6be232 2019-11-08 stsp if (p->nlargeobj == 0)
266 0a0a3048 2018-01-10 stsp goto checksum;
268 5e6be232 2019-11-08 stsp if (remain < p->nlargeobj * sizeof(*h->large_offsets)) {
269 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
272 fc79a48d 2018-07-09 stsp if (p->map)
273 fc79a48d 2018-07-09 stsp h->large_offsets = (uint64_t *)((uint8_t*)(p->map + offset));
275 5e6be232 2019-11-08 stsp h->large_offsets = malloc(p->nlargeobj *
276 5e6be232 2019-11-08 stsp sizeof(*h->large_offsets));
277 de30857e 2019-08-23 stsp if (h->large_offsets == NULL) {
278 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
281 fc79a48d 2018-07-09 stsp n = read(p->fd, h->large_offsets,
282 5e6be232 2019-11-08 stsp p->nlargeobj * sizeof(*h->large_offsets));
284 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
285 5e6be232 2019-11-08 stsp else if (n != p->nlargeobj * sizeof(*h->large_offsets)) {
286 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
290 0cb74cf4 2018-07-08 stsp if (verify)
291 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t*)h->large_offsets,
292 5e6be232 2019-11-08 stsp p->nlargeobj * sizeof(*h->large_offsets));
293 5e6be232 2019-11-08 stsp remain -= p->nlargeobj * sizeof(*h->large_offsets);
294 5e6be232 2019-11-08 stsp offset += p->nlargeobj * sizeof(*h->large_offsets);
297 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->trailer)) {
298 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
301 fc79a48d 2018-07-09 stsp if (p->map)
302 fc79a48d 2018-07-09 stsp h->trailer =
303 fc79a48d 2018-07-09 stsp (struct got_packidx_trailer *)((uint8_t*)(p->map + offset));
305 fc79a48d 2018-07-09 stsp h->trailer = malloc(sizeof(*h->trailer));
306 fc79a48d 2018-07-09 stsp if (h->trailer == NULL) {
307 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
310 fc79a48d 2018-07-09 stsp n = read(p->fd, h->trailer, sizeof(*h->trailer));
312 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
313 faaa1c0f 2018-09-15 stsp else if (n != sizeof(*h->trailer)) {
314 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
318 0cb74cf4 2018-07-08 stsp if (verify) {
319 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, h->trailer->packfile_sha1, SHA1_DIGEST_LENGTH);
320 0cb74cf4 2018-07-08 stsp SHA1Final(sha1, &ctx);
321 0cb74cf4 2018-07-08 stsp if (memcmp(h->trailer->packidx_sha1, sha1,
322 0cb74cf4 2018-07-08 stsp SHA1_DIGEST_LENGTH) != 0)
323 0cb74cf4 2018-07-08 stsp err = got_error(GOT_ERR_PACKIDX_CSUM);
326 817c5a18 2018-09-09 stsp return err;
329 817c5a18 2018-09-09 stsp const struct got_error *
330 817c5a18 2018-09-09 stsp got_packidx_open(struct got_packidx **packidx, const char *path, int verify)
332 817c5a18 2018-09-09 stsp const struct got_error *err = NULL;
333 817c5a18 2018-09-09 stsp struct got_packidx *p;
334 57377f07 2019-05-23 stsp struct stat sb;
336 817c5a18 2018-09-09 stsp *packidx = NULL;
338 817c5a18 2018-09-09 stsp p = calloc(1, sizeof(*p));
339 817c5a18 2018-09-09 stsp if (p == NULL)
340 638f9024 2019-05-13 stsp return got_error_from_errno("calloc");
342 a5b57ccf 2019-04-11 stsp p->fd = open(path, O_RDONLY | O_NOFOLLOW);
343 6772cf22 2019-08-28 hiltjo if (p->fd == -1) {
344 6772cf22 2019-08-28 hiltjo err = got_error_from_errno2("open", path);
346 6772cf22 2019-08-28 hiltjo return err;
349 57377f07 2019-05-23 stsp if (fstat(p->fd, &sb) != 0) {
350 57377f07 2019-05-23 stsp err = got_error_from_errno2("fstat", path);
351 817c5a18 2018-09-09 stsp close(p->fd);
353 817c5a18 2018-09-09 stsp return err;
355 57377f07 2019-05-23 stsp p->len = sb.st_size;
356 817c5a18 2018-09-09 stsp if (p->len < sizeof(p->hdr)) {
357 817c5a18 2018-09-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
358 817c5a18 2018-09-09 stsp close(p->fd);
360 817c5a18 2018-09-09 stsp return err;
363 817c5a18 2018-09-09 stsp p->path_packidx = strdup(path);
364 817c5a18 2018-09-09 stsp if (p->path_packidx == NULL) {
365 638f9024 2019-05-13 stsp err = got_error_from_errno("strdup");
369 817c5a18 2018-09-09 stsp #ifndef GOT_PACK_NO_MMAP
370 817c5a18 2018-09-09 stsp p->map = mmap(NULL, p->len, PROT_READ, MAP_PRIVATE, p->fd, 0);
371 3a11398b 2019-02-21 stsp if (p->map == MAP_FAILED) {
372 3a11398b 2019-02-21 stsp if (errno != ENOMEM) {
373 638f9024 2019-05-13 stsp err = got_error_from_errno("mmap");
376 817c5a18 2018-09-09 stsp p->map = NULL; /* fall back to read(2) */
380 817c5a18 2018-09-09 stsp err = got_packidx_init_hdr(p, verify);
383 0a0a3048 2018-01-10 stsp got_packidx_close(p);
385 0a0a3048 2018-01-10 stsp *packidx = p;
387 0a0a3048 2018-01-10 stsp return err;
390 57b35b75 2018-06-22 stsp const struct got_error *
391 6fd11751 2018-06-04 stsp got_packidx_close(struct got_packidx *packidx)
393 57b35b75 2018-06-22 stsp const struct got_error *err = NULL;
395 6fd11751 2018-06-04 stsp free(packidx->path_packidx);
396 fc79a48d 2018-07-09 stsp if (packidx->map) {
397 57b35b75 2018-06-22 stsp if (munmap(packidx->map, packidx->len) == -1)
398 638f9024 2019-05-13 stsp err = got_error_from_errno("munmap");
400 fc79a48d 2018-07-09 stsp free(packidx->hdr.magic);
401 fc79a48d 2018-07-09 stsp free(packidx->hdr.version);
402 fc79a48d 2018-07-09 stsp free(packidx->hdr.fanout_table);
403 fc79a48d 2018-07-09 stsp free(packidx->hdr.sorted_ids);
404 fc79a48d 2018-07-09 stsp free(packidx->hdr.crc32);
405 fc79a48d 2018-07-09 stsp free(packidx->hdr.offsets);
406 fc79a48d 2018-07-09 stsp free(packidx->hdr.large_offsets);
407 fc79a48d 2018-07-09 stsp free(packidx->hdr.trailer);
409 3a6ce05a 2019-02-11 stsp if (close(packidx->fd) != 0 && err == NULL)
410 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
411 0a0a3048 2018-01-10 stsp free(packidx);
413 57b35b75 2018-06-22 stsp return err;
416 a1fd68d8 2018-01-12 stsp static off_t
417 6fd11751 2018-06-04 stsp get_object_offset(struct got_packidx *packidx, int idx)
419 6fd11751 2018-06-04 stsp uint32_t offset = betoh32(packidx->hdr.offsets[idx]);
420 a1fd68d8 2018-01-12 stsp if (offset & GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX) {
421 a1fd68d8 2018-01-12 stsp uint64_t loffset;
422 a1fd68d8 2018-01-12 stsp idx = offset & GOT_PACKIDX_OFFSET_VAL_MASK;
423 5e6be232 2019-11-08 stsp if (idx < 0 || idx >= packidx->nlargeobj ||
424 6fd11751 2018-06-04 stsp packidx->hdr.large_offsets == NULL)
426 6fd11751 2018-06-04 stsp loffset = betoh64(packidx->hdr.large_offsets[idx]);
427 a1fd68d8 2018-01-12 stsp return (loffset > INT64_MAX ? -1 : (off_t)loffset);
429 a1fd68d8 2018-01-12 stsp return (off_t)(offset & GOT_PACKIDX_OFFSET_VAL_MASK);
433 ca6e02ac 2020-01-07 stsp got_packidx_get_object_idx_sha1(struct got_packidx *packidx, uint8_t *sha1)
435 ca6e02ac 2020-01-07 stsp u_int8_t id0 = sha1[0];
436 6fd11751 2018-06-04 stsp uint32_t totobj = betoh32(packidx->hdr.fanout_table[0xff]);
437 40aeb19c 2018-06-22 stsp int left = 0, right = totobj - 1;
439 a1fd68d8 2018-01-12 stsp if (id0 > 0)
440 40aeb19c 2018-06-22 stsp left = betoh32(packidx->hdr.fanout_table[id0 - 1]);
442 40aeb19c 2018-06-22 stsp while (left <= right) {
443 57b35b75 2018-06-22 stsp struct got_packidx_object_id *oid;
444 40aeb19c 2018-06-22 stsp int i, cmp;
446 40aeb19c 2018-06-22 stsp i = ((left + right) / 2);
447 40aeb19c 2018-06-22 stsp oid = &packidx->hdr.sorted_ids[i];
448 ca6e02ac 2020-01-07 stsp cmp = memcmp(sha1, oid->sha1, SHA1_DIGEST_LENGTH);
449 16dcbf91 2018-04-01 stsp if (cmp == 0)
451 40aeb19c 2018-06-22 stsp else if (cmp > 0)
452 40aeb19c 2018-06-22 stsp left = i + 1;
453 40aeb19c 2018-06-22 stsp else if (cmp < 0)
454 40aeb19c 2018-06-22 stsp right = i - 1;
461 ca6e02ac 2020-01-07 stsp got_packidx_get_object_idx(struct got_packidx *packidx, struct got_object_id *id)
463 ca6e02ac 2020-01-07 stsp return got_packidx_get_object_idx_sha1(packidx, id->sha1);
466 876c234b 2018-09-10 stsp const struct got_error *
467 dd88155e 2019-06-29 stsp got_packidx_match_id_str_prefix(struct got_object_id_queue *matched_ids,
468 4277420a 2019-06-29 stsp struct got_packidx *packidx, const char *id_str_prefix)
470 dd88155e 2019-06-29 stsp const struct got_error *err = NULL;
471 4277420a 2019-06-29 stsp u_int8_t id0;
472 4277420a 2019-06-29 stsp uint32_t totobj = betoh32(packidx->hdr.fanout_table[0xff]);
473 4277420a 2019-06-29 stsp char hex[3];
474 4277420a 2019-06-29 stsp size_t prefix_len = strlen(id_str_prefix);
475 e09a504c 2019-06-28 stsp struct got_packidx_object_id *oid;
478 dd88155e 2019-06-29 stsp SIMPLEQ_INIT(matched_ids);
480 4277420a 2019-06-29 stsp if (prefix_len < 2)
481 6dd1ece6 2019-11-10 stsp return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
483 4277420a 2019-06-29 stsp hex[0] = id_str_prefix[0];
484 4277420a 2019-06-29 stsp hex[1] = id_str_prefix[1];
485 4277420a 2019-06-29 stsp hex[2] = '\0';
486 4277420a 2019-06-29 stsp if (!got_parse_xdigit(&id0, hex))
487 6dd1ece6 2019-11-10 stsp return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
489 4277420a 2019-06-29 stsp i = betoh32(packidx->hdr.fanout_table[id0 - 1]);
490 4277420a 2019-06-29 stsp if (i == 0)
491 4277420a 2019-06-29 stsp return NULL;
493 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[i];
494 4277420a 2019-06-29 stsp while (i < totobj && oid->sha1[0] == id0) {
495 4277420a 2019-06-29 stsp char id_str[SHA1_DIGEST_STRING_LENGTH];
496 dd88155e 2019-06-29 stsp struct got_object_qid *qid;
499 4277420a 2019-06-29 stsp if (!got_sha1_digest_to_str(oid->sha1, id_str, sizeof(id_str)))
500 4277420a 2019-06-29 stsp return got_error(GOT_ERR_NO_SPACE);
502 4277420a 2019-06-29 stsp cmp = strncmp(id_str, id_str_prefix, prefix_len);
503 4277420a 2019-06-29 stsp if (cmp < 0) {
504 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[++i];
506 4277420a 2019-06-29 stsp } else if (cmp > 0)
509 dd88155e 2019-06-29 stsp err = got_object_qid_alloc_partial(&qid);
512 dd88155e 2019-06-29 stsp memcpy(qid->id->sha1, oid->sha1, SHA1_DIGEST_LENGTH);
513 dd88155e 2019-06-29 stsp SIMPLEQ_INSERT_TAIL(matched_ids, qid, entry);
515 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[++i];
519 0adc7bcc 2019-06-29 stsp got_object_id_queue_free(matched_ids);
520 dd88155e 2019-06-29 stsp return err;
523 e09a504c 2019-06-28 stsp const struct got_error *
524 876c234b 2018-09-10 stsp got_pack_stop_privsep_child(struct got_pack *pack)
526 96732e0b 2018-11-11 stsp const struct got_error *err = NULL;
528 876c234b 2018-09-10 stsp if (pack->privsep_child == NULL)
529 876c234b 2018-09-10 stsp return NULL;
531 876c234b 2018-09-10 stsp err = got_privsep_send_stop(pack->privsep_child->imsg_fd);
533 96732e0b 2018-11-11 stsp return err;
534 96732e0b 2018-11-11 stsp err = got_privsep_wait_for_child(pack->privsep_child->pid);
535 0dd5271b 2019-05-10 stsp if (close(pack->privsep_child->imsg_fd) != 0 && err == NULL)
536 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
537 876c234b 2018-09-10 stsp free(pack->privsep_child);
538 876c234b 2018-09-10 stsp pack->privsep_child = NULL;
539 876c234b 2018-09-10 stsp return err;
542 d7464085 2018-07-09 stsp const struct got_error *
543 7e656b93 2018-03-17 stsp got_pack_close(struct got_pack *pack)
545 d7464085 2018-07-09 stsp const struct got_error *err = NULL;
547 876c234b 2018-09-10 stsp err = got_pack_stop_privsep_child(pack);
548 876c234b 2018-09-10 stsp if (pack->map && munmap(pack->map, pack->filesize) == -1 && !err)
549 638f9024 2019-05-13 stsp err = got_error_from_errno("munmap");
550 3a6ce05a 2019-02-11 stsp if (pack->fd != -1 && close(pack->fd) != 0 && err == NULL)
551 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
552 8b2180d4 2018-04-26 stsp pack->fd = -1;
553 4589e373 2018-03-17 stsp free(pack->path_packfile);
554 4589e373 2018-03-17 stsp pack->path_packfile = NULL;
555 4589e373 2018-03-17 stsp pack->filesize = 0;
556 ab2f42e7 2019-11-10 stsp if (pack->delta_cache) {
557 ab2f42e7 2019-11-10 stsp got_delta_cache_free(pack->delta_cache);
558 ab2f42e7 2019-11-10 stsp pack->delta_cache = NULL;
561 c7fe698a 2018-01-23 stsp return err;
564 c7fe698a 2018-01-23 stsp static const struct got_error *
565 d7464085 2018-07-09 stsp parse_object_type_and_size(uint8_t *type, uint64_t *size, size_t *len,
566 d7464085 2018-07-09 stsp struct got_pack *pack, off_t offset)
568 a487c1d0 2018-01-14 stsp uint8_t t = 0;
569 a487c1d0 2018-01-14 stsp uint64_t s = 0;
570 a487c1d0 2018-01-14 stsp uint8_t sizeN;
571 d7464085 2018-07-09 stsp size_t mapoff = 0;
576 d7464085 2018-07-09 stsp if (offset >= pack->filesize)
577 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
579 d7464085 2018-07-09 stsp if (pack->map) {
580 d7464085 2018-07-09 stsp mapoff = (size_t)offset;
582 d7464085 2018-07-09 stsp if (lseek(pack->fd, offset, SEEK_SET) == -1)
583 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
587 a1fd68d8 2018-01-12 stsp /* We do not support size values which don't fit in 64 bit. */
589 a487c1d0 2018-01-14 stsp return got_error(GOT_ERR_NO_SPACE);
591 d7464085 2018-07-09 stsp if (pack->map) {
592 d7464085 2018-07-09 stsp sizeN = *(pack->map + mapoff);
593 d7464085 2018-07-09 stsp mapoff += sizeof(sizeN);
595 d7464085 2018-07-09 stsp ssize_t n = read(pack->fd, &sizeN, sizeof(sizeN));
597 638f9024 2019-05-13 stsp return got_error_from_errno("read");
598 d7464085 2018-07-09 stsp if (n != sizeof(sizeN))
599 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
601 d7464085 2018-07-09 stsp *len += sizeof(sizeN);
603 a1fd68d8 2018-01-12 stsp if (i == 0) {
604 a487c1d0 2018-01-14 stsp t = (sizeN & GOT_PACK_OBJ_SIZE0_TYPE_MASK) >>
605 a1fd68d8 2018-01-12 stsp GOT_PACK_OBJ_SIZE0_TYPE_MASK_SHIFT;
606 a487c1d0 2018-01-14 stsp s = (sizeN & GOT_PACK_OBJ_SIZE0_VAL_MASK);
608 a1fd68d8 2018-01-12 stsp size_t shift = 4 + 7 * (i - 1);
609 a487c1d0 2018-01-14 stsp s |= ((sizeN & GOT_PACK_OBJ_SIZE_VAL_MASK) << shift);
612 a1fd68d8 2018-01-12 stsp } while (sizeN & GOT_PACK_OBJ_SIZE_MORE);
616 a487c1d0 2018-01-14 stsp return NULL;
619 a1fd68d8 2018-01-12 stsp static const struct got_error *
620 5f25cc85 2019-11-26 stsp open_plain_object(struct got_object **obj, struct got_object_id *id,
621 5f25cc85 2019-11-26 stsp uint8_t type, off_t offset, size_t size, int idx)
623 6ccb713b 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
624 6ccb713b 2018-01-19 stsp if (*obj == NULL)
625 638f9024 2019-05-13 stsp return got_error_from_errno("calloc");
627 6ccb713b 2018-01-19 stsp (*obj)->type = type;
628 6ccb713b 2018-01-19 stsp (*obj)->flags = GOT_OBJ_FLAG_PACKED;
629 c59b3346 2018-09-11 stsp (*obj)->pack_idx = idx;
630 6ccb713b 2018-01-19 stsp (*obj)->hdrlen = 0;
631 6ccb713b 2018-01-19 stsp (*obj)->size = size;
632 106807b4 2018-09-15 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
633 6ccb713b 2018-01-19 stsp (*obj)->pack_offset = offset;
635 b107e67f 2018-01-19 stsp return NULL;
638 b107e67f 2018-01-19 stsp static const struct got_error *
639 d7464085 2018-07-09 stsp parse_negative_offset(int64_t *offset, size_t *len, struct got_pack *pack,
640 d7464085 2018-07-09 stsp off_t delta_offset)
642 b107e67f 2018-01-19 stsp int64_t o = 0;
643 b107e67f 2018-01-19 stsp uint8_t offN;
646 a0de39f3 2019-08-09 stsp *offset = 0;
650 b107e67f 2018-01-19 stsp /* We do not support offset values which don't fit in 64 bit. */
652 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_NO_SPACE);
654 d7464085 2018-07-09 stsp if (pack->map) {
655 d7464085 2018-07-09 stsp size_t mapoff;
656 d7464085 2018-07-09 stsp if (delta_offset >= pack->filesize)
657 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
658 d7464085 2018-07-09 stsp mapoff = (size_t)delta_offset + *len;
659 d7464085 2018-07-09 stsp offN = *(pack->map + mapoff);
662 d7464085 2018-07-09 stsp n = read(pack->fd, &offN, sizeof(offN));
664 638f9024 2019-05-13 stsp return got_error_from_errno("read");
665 d7464085 2018-07-09 stsp if (n != sizeof(offN))
666 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
668 d7464085 2018-07-09 stsp *len += sizeof(offN);
670 b107e67f 2018-01-19 stsp if (i == 0)
671 b107e67f 2018-01-19 stsp o = (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
675 cecc778e 2018-01-23 stsp o += (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
678 b107e67f 2018-01-19 stsp } while (offN & GOT_PACK_OBJ_DELTA_OFF_MORE);
680 b107e67f 2018-01-19 stsp *offset = o;
681 6ccb713b 2018-01-19 stsp return NULL;
684 6ccb713b 2018-01-19 stsp static const struct got_error *
685 d7464085 2018-07-09 stsp parse_offset_delta(off_t *base_offset, size_t *len, struct got_pack *pack,
686 d7464085 2018-07-09 stsp off_t offset, int tslen)
688 96f5e8b3 2018-01-23 stsp const struct got_error *err;
689 b107e67f 2018-01-19 stsp int64_t negoffset;
690 b107e67f 2018-01-19 stsp size_t negofflen;
694 d7464085 2018-07-09 stsp err = parse_negative_offset(&negoffset, &negofflen, pack,
695 d7464085 2018-07-09 stsp offset + tslen);
697 b107e67f 2018-01-19 stsp return err;
699 b107e67f 2018-01-19 stsp /* Compute the base object's offset (must be in the same pack file). */
700 96f5e8b3 2018-01-23 stsp *base_offset = (offset - negoffset);
701 96f5e8b3 2018-01-23 stsp if (*base_offset <= 0)
702 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_BAD_PACKFILE);
704 d7464085 2018-07-09 stsp *len = negofflen;
705 96f5e8b3 2018-01-23 stsp return NULL;
708 0e22967e 2018-02-11 stsp static const struct got_error *
709 c8ecd499 2018-09-09 stsp resolve_delta_chain(struct got_delta_chain *, struct got_packidx *,
710 c8ecd499 2018-09-09 stsp struct got_pack *, off_t, size_t, int, size_t, unsigned int);
712 42c69117 2019-11-10 stsp static const struct got_error *
713 42c69117 2019-11-10 stsp read_delta_data(uint8_t **delta_buf, size_t *delta_len,
714 42c69117 2019-11-10 stsp size_t delta_data_offset, struct got_pack *pack)
716 42c69117 2019-11-10 stsp const struct got_error *err = NULL;
718 42c69117 2019-11-10 stsp if (pack->map) {
719 42c69117 2019-11-10 stsp if (delta_data_offset >= pack->filesize)
720 42c69117 2019-11-10 stsp return got_error(GOT_ERR_PACK_OFFSET);
721 42c69117 2019-11-10 stsp err = got_inflate_to_mem_mmap(delta_buf, delta_len, pack->map,
722 42c69117 2019-11-10 stsp delta_data_offset, pack->filesize - delta_data_offset);
724 42c69117 2019-11-10 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET) == -1)
725 42c69117 2019-11-10 stsp return got_error_from_errno("lseek");
726 42c69117 2019-11-10 stsp err = got_inflate_to_mem_fd(delta_buf, delta_len, pack->fd);
728 42c69117 2019-11-10 stsp return err;
731 96f5e8b3 2018-01-23 stsp static const struct got_error *
732 c336f889 2018-07-23 stsp add_delta(struct got_delta_chain *deltas, off_t delta_offset, size_t tslen,
733 42c69117 2019-11-10 stsp int delta_type, size_t delta_size, size_t delta_data_offset)
735 bdd2fbb3 2018-02-11 stsp struct got_delta *delta;
737 c336f889 2018-07-23 stsp delta = got_delta_open(delta_offset, tslen, delta_type, delta_size,
738 42c69117 2019-11-10 stsp delta_data_offset);
739 bdd2fbb3 2018-02-11 stsp if (delta == NULL)
740 638f9024 2019-05-13 stsp return got_error_from_errno("got_delta_open");
741 bdd2fbb3 2018-02-11 stsp /* delta is freed in got_object_close() */
742 bdd2fbb3 2018-02-11 stsp deltas->nentries++;
743 bdd2fbb3 2018-02-11 stsp SIMPLEQ_INSERT_HEAD(&deltas->entries, delta, entry);
744 bdd2fbb3 2018-02-11 stsp return NULL;
747 bdd2fbb3 2018-02-11 stsp static const struct got_error *
748 6b9c9673 2018-01-23 stsp resolve_offset_delta(struct got_delta_chain *deltas,
749 c8ecd499 2018-09-09 stsp struct got_packidx *packidx, struct got_pack *pack, off_t delta_offset,
750 c8ecd499 2018-09-09 stsp size_t tslen, int delta_type, size_t delta_size, unsigned int recursion)
753 a3500804 2018-01-23 stsp const struct got_error *err;
754 c3703302 2018-01-23 stsp off_t base_offset;
755 c3703302 2018-01-23 stsp uint8_t base_type;
756 c3703302 2018-01-23 stsp uint64_t base_size;
757 c3703302 2018-01-23 stsp size_t base_tslen;
758 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
759 42c69117 2019-11-10 stsp size_t consumed;
761 d7464085 2018-07-09 stsp err = parse_offset_delta(&base_offset, &consumed, pack,
762 d7464085 2018-07-09 stsp delta_offset, tslen);
764 a3500804 2018-01-23 stsp return err;
766 d7464085 2018-07-09 stsp delta_data_offset = delta_offset + tslen + consumed;
767 d7464085 2018-07-09 stsp if (delta_data_offset >= pack->filesize)
768 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
770 d7464085 2018-07-09 stsp if (pack->map == NULL) {
771 d7464085 2018-07-09 stsp delta_data_offset = lseek(pack->fd, 0, SEEK_CUR);
772 d7464085 2018-07-09 stsp if (delta_data_offset == -1)
773 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
776 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type, delta_size,
777 42c69117 2019-11-10 stsp delta_data_offset);
779 1a35c1bc 2019-05-22 stsp return err;
781 c3703302 2018-01-23 stsp /* An offset delta must be in the same packfile. */
782 1a35c1bc 2019-05-22 stsp if (base_offset >= pack->filesize)
783 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_PACK_OFFSET);
785 348f621c 2018-01-23 stsp err = parse_object_type_and_size(&base_type, &base_size, &base_tslen,
786 d7464085 2018-07-09 stsp pack, base_offset);
788 1a35c1bc 2019-05-22 stsp return err;
790 1a35c1bc 2019-05-22 stsp return resolve_delta_chain(deltas, packidx, pack, base_offset,
791 b0e2201a 2018-06-22 stsp base_tslen, base_type, base_size, recursion - 1);
794 c3703302 2018-01-23 stsp static const struct got_error *
795 c8ecd499 2018-09-09 stsp resolve_ref_delta(struct got_delta_chain *deltas, struct got_packidx *packidx,
796 c8ecd499 2018-09-09 stsp struct got_pack *pack, off_t delta_offset, size_t tslen, int delta_type,
797 c8ecd499 2018-09-09 stsp size_t delta_size, unsigned int recursion)
799 6b9c9673 2018-01-23 stsp const struct got_error *err;
800 6b9c9673 2018-01-23 stsp struct got_object_id id;
802 6b9c9673 2018-01-23 stsp off_t base_offset;
803 6b9c9673 2018-01-23 stsp uint8_t base_type;
804 6b9c9673 2018-01-23 stsp uint64_t base_size;
805 6b9c9673 2018-01-23 stsp size_t base_tslen;
806 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
808 42c69117 2019-11-10 stsp if (delta_offset + tslen >= pack->filesize)
809 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
811 d7464085 2018-07-09 stsp if (pack->map) {
812 42c69117 2019-11-10 stsp size_t mapoff = delta_offset + tslen;
813 d7464085 2018-07-09 stsp memcpy(&id, pack->map + mapoff, sizeof(id));
814 d7464085 2018-07-09 stsp mapoff += sizeof(id);
815 42c69117 2019-11-10 stsp delta_data_offset = (off_t)mapoff;
818 42c69117 2019-11-10 stsp n = read(pack->fd, &id, sizeof(id));
820 638f9024 2019-05-13 stsp return got_error_from_errno("read");
821 d7464085 2018-07-09 stsp if (n != sizeof(id))
822 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
823 e40b19ed 2020-01-06 stsp delta_data_offset = lseek(pack->fd, 0, SEEK_CUR);
824 e40b19ed 2020-01-06 stsp if (delta_data_offset == -1)
825 e40b19ed 2020-01-06 stsp return got_error_from_errno("lseek");
828 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type, delta_size,
829 42c69117 2019-11-10 stsp delta_data_offset);
831 1a35c1bc 2019-05-22 stsp return err;
833 652b2703 2018-06-22 stsp /* Delta base must be in the same pack file. */
834 1510f469 2018-09-09 stsp idx = got_packidx_get_object_idx(packidx, &id);
835 1a35c1bc 2019-05-22 stsp if (idx == -1)
836 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_BAD_PACKFILE);
838 6b9c9673 2018-01-23 stsp base_offset = get_object_offset(packidx, idx);
839 1a35c1bc 2019-05-22 stsp if (base_offset == (uint64_t)-1)
840 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_BAD_PACKIDX);
842 1a35c1bc 2019-05-22 stsp if (base_offset >= pack->filesize)
843 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_PACK_OFFSET);
845 6b9c9673 2018-01-23 stsp err = parse_object_type_and_size(&base_type, &base_size, &base_tslen,
846 d7464085 2018-07-09 stsp pack, base_offset);
848 1a35c1bc 2019-05-22 stsp return err;
850 1a35c1bc 2019-05-22 stsp return resolve_delta_chain(deltas, packidx, pack, base_offset,
851 0c048b15 2018-04-27 stsp base_tslen, base_type, base_size, recursion - 1);
854 6b9c9673 2018-01-23 stsp static const struct got_error *
855 c8ecd499 2018-09-09 stsp resolve_delta_chain(struct got_delta_chain *deltas, struct got_packidx *packidx,
856 c8ecd499 2018-09-09 stsp struct got_pack *pack, off_t delta_offset, size_t tslen, int delta_type,
857 c8ecd499 2018-09-09 stsp size_t delta_size, unsigned int recursion)
859 c3703302 2018-01-23 stsp const struct got_error *err = NULL;
861 5b7e13a7 2018-04-02 stsp if (--recursion == 0)
862 5b7e13a7 2018-04-02 stsp return got_error(GOT_ERR_RECURSION);
864 c3703302 2018-01-23 stsp switch (delta_type) {
865 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_COMMIT:
866 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TREE:
867 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_BLOB:
868 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TAG:
869 c3703302 2018-01-23 stsp /* Plain types are the final delta base. Recursion ends. */
870 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type,
871 42c69117 2019-11-10 stsp delta_size, 0);
873 a3500804 2018-01-23 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
874 c8ecd499 2018-09-09 stsp err = resolve_offset_delta(deltas, packidx, pack,
875 b0e2201a 2018-06-22 stsp delta_offset, tslen, delta_type, delta_size, recursion - 1);
877 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_REF_DELTA:
878 c8ecd499 2018-09-09 stsp err = resolve_ref_delta(deltas, packidx, pack,
879 b0e2201a 2018-06-22 stsp delta_offset, tslen, delta_type, delta_size, recursion - 1);
882 4810de4a 2018-04-01 stsp return got_error(GOT_ERR_OBJ_TYPE);
885 96f5e8b3 2018-01-23 stsp return err;
888 96f5e8b3 2018-01-23 stsp static const struct got_error *
889 a98c62b1 2018-09-09 stsp open_delta_object(struct got_object **obj, struct got_packidx *packidx,
890 a98c62b1 2018-09-09 stsp struct got_pack *pack, struct got_object_id *id, off_t offset,
891 c59b3346 2018-09-11 stsp size_t tslen, int delta_type, size_t delta_size, int idx)
893 96f5e8b3 2018-01-23 stsp const struct got_error *err = NULL;
894 96f5e8b3 2018-01-23 stsp int resolved_type;
896 b107e67f 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
897 b107e67f 2018-01-19 stsp if (*obj == NULL)
898 638f9024 2019-05-13 stsp return got_error_from_errno("calloc");
900 96f5e8b3 2018-01-23 stsp (*obj)->flags = 0;
901 b107e67f 2018-01-19 stsp (*obj)->hdrlen = 0;
902 39e73dc9 2018-03-03 stsp (*obj)->size = 0; /* Not known because deltas aren't applied yet. */
903 106807b4 2018-09-15 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
904 cecc778e 2018-01-23 stsp (*obj)->pack_offset = offset + tslen;
906 1a35c1bc 2019-05-22 stsp SIMPLEQ_INIT(&(*obj)->deltas.entries);
907 1a35c1bc 2019-05-22 stsp (*obj)->flags |= GOT_OBJ_FLAG_DELTIFIED;
908 96f5e8b3 2018-01-23 stsp (*obj)->flags |= GOT_OBJ_FLAG_PACKED;
909 c59b3346 2018-09-11 stsp (*obj)->pack_idx = idx;
911 c8ecd499 2018-09-09 stsp err = resolve_delta_chain(&(*obj)->deltas, packidx, pack, offset,
912 b0e2201a 2018-06-22 stsp tslen, delta_type, delta_size, GOT_DELTA_CHAIN_RECURSION_MAX);
916 96f5e8b3 2018-01-23 stsp err = got_delta_chain_get_base_type(&resolved_type, &(*obj)->deltas);
919 96f5e8b3 2018-01-23 stsp (*obj)->type = resolved_type;
922 96f5e8b3 2018-01-23 stsp got_object_close(*obj);
923 96f5e8b3 2018-01-23 stsp *obj = NULL;
925 96f5e8b3 2018-01-23 stsp return err;
928 2090a03d 2018-09-09 stsp const struct got_error *
929 2090a03d 2018-09-09 stsp got_packfile_open_object(struct got_object **obj, struct got_pack *pack,
930 6fd11751 2018-06-04 stsp struct got_packidx *packidx, int idx, struct got_object_id *id)
932 a1fd68d8 2018-01-12 stsp const struct got_error *err = NULL;
933 a1fd68d8 2018-01-12 stsp off_t offset;
934 6c00b545 2018-01-17 stsp uint8_t type;
935 6c00b545 2018-01-17 stsp uint64_t size;
936 3ee5fc21 2018-01-17 stsp size_t tslen;
938 6c00b545 2018-01-17 stsp *obj = NULL;
940 a1fd68d8 2018-01-12 stsp offset = get_object_offset(packidx, idx);
941 a1fd68d8 2018-01-12 stsp if (offset == (uint64_t)-1)
942 a1fd68d8 2018-01-12 stsp return got_error(GOT_ERR_BAD_PACKIDX);
944 d7464085 2018-07-09 stsp err = parse_object_type_and_size(&type, &size, &tslen, pack, offset);
946 35c73765 2018-09-09 stsp return err;
948 6c00b545 2018-01-17 stsp switch (type) {
949 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_COMMIT:
950 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_TREE:
951 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_BLOB:
952 d33fc9ef 2018-01-23 stsp case GOT_OBJ_TYPE_TAG:
953 5f25cc85 2019-11-26 stsp err = open_plain_object(obj, id, type, offset + tslen,
954 5f25cc85 2019-11-26 stsp size, idx);
956 b107e67f 2018-01-19 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
957 a48db7e5 2018-01-23 stsp case GOT_OBJ_TYPE_REF_DELTA:
958 a98c62b1 2018-09-09 stsp err = open_delta_object(obj, packidx, pack, id, offset,
959 c59b3346 2018-09-11 stsp tslen, type, size, idx);
962 4810de4a 2018-04-01 stsp err = got_error(GOT_ERR_OBJ_TYPE);
966 3ee5fc21 2018-01-17 stsp return err;
969 efd2a263 2018-01-19 stsp static const struct got_error *
970 42c69117 2019-11-10 stsp get_delta_chain_max_size(uint64_t *max_size, struct got_delta_chain *deltas,
971 42c69117 2019-11-10 stsp struct got_pack *pack)
973 22484865 2018-03-13 stsp struct got_delta *delta;
974 22484865 2018-03-13 stsp uint64_t base_size = 0, result_size = 0;
976 22484865 2018-03-13 stsp *max_size = 0;
977 22484865 2018-03-13 stsp SIMPLEQ_FOREACH(delta, &deltas->entries, entry) {
978 22484865 2018-03-13 stsp /* Plain object types are the delta base. */
979 22484865 2018-03-13 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
980 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TREE &&
981 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
982 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TAG) {
983 22484865 2018-03-13 stsp const struct got_error *err;
984 42c69117 2019-11-10 stsp uint8_t *delta_buf;
985 42c69117 2019-11-10 stsp size_t delta_len;
986 ab2f42e7 2019-11-10 stsp int cached = 1;
988 ab2f42e7 2019-11-10 stsp got_delta_cache_get(&delta_buf, &delta_len,
989 ab2f42e7 2019-11-10 stsp pack->delta_cache, delta->data_offset);
990 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
991 ab2f42e7 2019-11-10 stsp cached = 0;
992 ab2f42e7 2019-11-10 stsp err = read_delta_data(&delta_buf, &delta_len,
993 ab2f42e7 2019-11-10 stsp delta->data_offset, pack);
995 ab2f42e7 2019-11-10 stsp return err;
996 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
997 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
998 ab2f42e7 2019-11-10 stsp if (err == NULL)
999 ab2f42e7 2019-11-10 stsp cached = 1;
1000 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1001 ab2f42e7 2019-11-10 stsp free(delta_buf);
1002 ab2f42e7 2019-11-10 stsp return err;
1005 a53d2f13 2018-03-17 stsp err = got_delta_get_sizes(&base_size, &result_size,
1006 42c69117 2019-11-10 stsp delta_buf, delta_len);
1007 ab2f42e7 2019-11-10 stsp if (!cached)
1008 ab2f42e7 2019-11-10 stsp free(delta_buf);
1010 22484865 2018-03-13 stsp return err;
1012 22484865 2018-03-13 stsp base_size = delta->size;
1013 22484865 2018-03-13 stsp if (base_size > *max_size)
1014 22484865 2018-03-13 stsp *max_size = base_size;
1015 22484865 2018-03-13 stsp if (result_size > *max_size)
1016 22484865 2018-03-13 stsp *max_size = result_size;
1019 9feb4ff2 2018-03-14 stsp return NULL;
1022 ac544f8c 2019-01-13 stsp const struct got_error *
1023 42c69117 2019-11-10 stsp got_pack_get_max_delta_object_size(uint64_t *size, struct got_object *obj,
1024 42c69117 2019-11-10 stsp struct got_pack *pack)
1026 85a703fa 2019-01-13 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0)
1027 85a703fa 2019-01-13 stsp return got_error(GOT_ERR_OBJ_TYPE);
1029 42c69117 2019-11-10 stsp return get_delta_chain_max_size(size, &obj->deltas, pack);
1032 22484865 2018-03-13 stsp static const struct got_error *
1033 b29656e2 2018-03-16 stsp dump_delta_chain_to_file(size_t *result_size, struct got_delta_chain *deltas,
1034 3840f4c9 2018-09-12 stsp struct got_pack *pack, FILE *outfile, FILE *base_file, FILE *accum_file)
1036 efd2a263 2018-01-19 stsp const struct got_error *err = NULL;
1037 6691714a 2018-01-23 stsp struct got_delta *delta;
1038 42c69117 2019-11-10 stsp uint8_t *base_buf = NULL, *accum_buf = NULL, *delta_buf;
1039 42c69117 2019-11-10 stsp size_t base_bufsz = 0, accum_size = 0, delta_len;
1040 22484865 2018-03-13 stsp uint64_t max_size;
1041 6691714a 2018-01-23 stsp int n = 0;
1043 b29656e2 2018-03-16 stsp *result_size = 0;
1045 710bb5ca 2018-01-23 stsp if (SIMPLEQ_EMPTY(&deltas->entries))
1046 6691714a 2018-01-23 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
1048 8628c62d 2018-03-15 stsp /* We process small enough files entirely in memory for speed. */
1049 42c69117 2019-11-10 stsp err = get_delta_chain_max_size(&max_size, deltas, pack);
1051 22484865 2018-03-13 stsp return err;
1052 8628c62d 2018-03-15 stsp if (max_size < GOT_DELTA_RESULT_SIZE_CACHED_MAX) {
1053 8628c62d 2018-03-15 stsp accum_buf = malloc(max_size);
1054 8628c62d 2018-03-15 stsp if (accum_buf == NULL)
1055 638f9024 2019-05-13 stsp return got_error_from_errno("malloc");
1056 3840f4c9 2018-09-12 stsp base_file = NULL;
1057 3840f4c9 2018-09-12 stsp accum_file = NULL;
1060 6691714a 2018-01-23 stsp /* Deltas are ordered in ascending order. */
1061 710bb5ca 2018-01-23 stsp SIMPLEQ_FOREACH(delta, &deltas->entries, entry) {
1062 ab2f42e7 2019-11-10 stsp int cached = 1;
1063 a6b158cc 2018-02-11 stsp if (n == 0) {
1064 34fca9c3 2018-11-11 stsp size_t mapoff;
1065 0c048b15 2018-04-27 stsp off_t delta_data_offset;
1067 a6b158cc 2018-02-11 stsp /* Plain object types are the delta base. */
1068 a6b158cc 2018-02-11 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1069 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1070 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1071 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1072 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1073 72eb3431 2018-04-01 stsp goto done;
1076 0c048b15 2018-04-27 stsp delta_data_offset = delta->offset + delta->tslen;
1077 0c048b15 2018-04-27 stsp if (delta_data_offset >= pack->filesize) {
1078 0c048b15 2018-04-27 stsp err = got_error(GOT_ERR_PACK_OFFSET);
1079 0c048b15 2018-04-27 stsp goto done;
1081 d7464085 2018-07-09 stsp if (pack->map == NULL) {
1082 d7464085 2018-07-09 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET)
1084 638f9024 2019-05-13 stsp err = got_error_from_errno("lseek");
1085 d7464085 2018-07-09 stsp goto done;
1088 d7464085 2018-07-09 stsp if (base_file) {
1089 d7464085 2018-07-09 stsp if (pack->map) {
1090 d7464085 2018-07-09 stsp mapoff = (size_t)delta_data_offset;
1091 d7464085 2018-07-09 stsp err = got_inflate_to_file_mmap(
1092 34fca9c3 2018-11-11 stsp &base_bufsz, pack->map, mapoff,
1093 d7464085 2018-07-09 stsp pack->filesize - mapoff, base_file);
1095 34fca9c3 2018-11-11 stsp err = got_inflate_to_file_fd(
1096 34fca9c3 2018-11-11 stsp &base_bufsz, pack->fd, base_file);
1098 d7464085 2018-07-09 stsp if (pack->map) {
1099 d7464085 2018-07-09 stsp mapoff = (size_t)delta_data_offset;
1100 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&base_buf,
1101 34fca9c3 2018-11-11 stsp &base_bufsz, pack->map, mapoff,
1102 d7464085 2018-07-09 stsp pack->filesize - mapoff);
1104 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&base_buf,
1105 34fca9c3 2018-11-11 stsp &base_bufsz, pack->fd);
1108 a6b158cc 2018-02-11 stsp goto done;
1110 8628c62d 2018-03-15 stsp if (base_file)
1111 8628c62d 2018-03-15 stsp rewind(base_file);
1115 ab2f42e7 2019-11-10 stsp got_delta_cache_get(&delta_buf, &delta_len,
1116 ab2f42e7 2019-11-10 stsp pack->delta_cache, delta->data_offset);
1117 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1118 ab2f42e7 2019-11-10 stsp cached = 0;
1119 ab2f42e7 2019-11-10 stsp err = read_delta_data(&delta_buf, &delta_len,
1120 ab2f42e7 2019-11-10 stsp delta->data_offset, pack);
1122 ab2f42e7 2019-11-10 stsp goto done;
1123 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1124 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1125 ab2f42e7 2019-11-10 stsp if (err == NULL)
1126 ab2f42e7 2019-11-10 stsp cached = 1;
1127 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1128 ab2f42e7 2019-11-10 stsp free(delta_buf);
1129 ab2f42e7 2019-11-10 stsp goto done;
1132 8628c62d 2018-03-15 stsp if (base_buf) {
1133 34fca9c3 2018-11-11 stsp err = got_delta_apply_in_mem(base_buf, base_bufsz,
1134 42c69117 2019-11-10 stsp delta_buf, delta_len, accum_buf,
1135 34fca9c3 2018-11-11 stsp &accum_size, max_size);
1138 42c69117 2019-11-10 stsp err = got_delta_apply(base_file, delta_buf,
1139 42c69117 2019-11-10 stsp delta_len,
1140 8628c62d 2018-03-15 stsp /* Final delta application writes to output file. */
1141 b29656e2 2018-03-16 stsp ++n < deltas->nentries ? accum_file : outfile,
1142 b29656e2 2018-03-16 stsp &accum_size);
1144 ab2f42e7 2019-11-10 stsp if (!cached)
1145 ab2f42e7 2019-11-10 stsp free(delta_buf);
1147 6691714a 2018-01-23 stsp goto done;
1149 710bb5ca 2018-01-23 stsp if (n < deltas->nentries) {
1150 6691714a 2018-01-23 stsp /* Accumulated delta becomes the new base. */
1151 8628c62d 2018-03-15 stsp if (base_buf) {
1152 8628c62d 2018-03-15 stsp uint8_t *tmp = accum_buf;
1154 34fca9c3 2018-11-11 stsp * Base buffer switches roles with accumulation
1155 34fca9c3 2018-11-11 stsp * buffer. Ensure it can hold the largest
1156 34fca9c3 2018-11-11 stsp * result in the delta chain. The initial
1157 34fca9c3 2018-11-11 stsp * allocation might have been smaller.
1159 34fca9c3 2018-11-11 stsp if (base_bufsz < max_size) {
1160 34fca9c3 2018-11-11 stsp uint8_t *p;
1161 34fca9c3 2018-11-11 stsp p = reallocarray(base_buf, 1, max_size);
1162 34fca9c3 2018-11-11 stsp if (p == NULL) {
1163 638f9024 2019-05-13 stsp err = got_error_from_errno(
1164 230a42bd 2019-05-11 jcs "reallocarray");
1165 34fca9c3 2018-11-11 stsp goto done;
1167 34fca9c3 2018-11-11 stsp base_buf = p;
1168 34fca9c3 2018-11-11 stsp base_bufsz = max_size;
1170 8628c62d 2018-03-15 stsp accum_buf = base_buf;
1171 8628c62d 2018-03-15 stsp base_buf = tmp;
1173 8628c62d 2018-03-15 stsp FILE *tmp = accum_file;
1174 8628c62d 2018-03-15 stsp accum_file = base_file;
1175 8628c62d 2018-03-15 stsp base_file = tmp;
1176 8628c62d 2018-03-15 stsp rewind(base_file);
1177 8628c62d 2018-03-15 stsp rewind(accum_file);
1183 8628c62d 2018-03-15 stsp free(base_buf);
1184 8628c62d 2018-03-15 stsp if (accum_buf) {
1185 8628c62d 2018-03-15 stsp size_t len = fwrite(accum_buf, 1, accum_size, outfile);
1186 8628c62d 2018-03-15 stsp free(accum_buf);
1187 8628c62d 2018-03-15 stsp if (len != accum_size)
1188 673702af 2018-07-23 stsp err = got_ferror(outfile, GOT_ERR_IO);
1190 6691714a 2018-01-23 stsp rewind(outfile);
1191 b29656e2 2018-03-16 stsp if (err == NULL)
1192 b29656e2 2018-03-16 stsp *result_size = accum_size;
1193 e0ab43e7 2018-03-16 stsp return err;
1196 e0ab43e7 2018-03-16 stsp static const struct got_error *
1197 e0ab43e7 2018-03-16 stsp dump_delta_chain_to_mem(uint8_t **outbuf, size_t *outlen,
1198 48095039 2018-09-09 stsp struct got_delta_chain *deltas, struct got_pack *pack)
1200 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1201 e0ab43e7 2018-03-16 stsp struct got_delta *delta;
1202 42c69117 2019-11-10 stsp uint8_t *base_buf = NULL, *accum_buf = NULL, *delta_buf;
1203 42c69117 2019-11-10 stsp size_t base_bufsz = 0, accum_size = 0, delta_len;
1204 e0ab43e7 2018-03-16 stsp uint64_t max_size;
1205 e0ab43e7 2018-03-16 stsp int n = 0;
1207 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1208 e0ab43e7 2018-03-16 stsp *outlen = 0;
1210 e0ab43e7 2018-03-16 stsp if (SIMPLEQ_EMPTY(&deltas->entries))
1211 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
1213 42c69117 2019-11-10 stsp err = get_delta_chain_max_size(&max_size, deltas, pack);
1215 e0ab43e7 2018-03-16 stsp return err;
1216 e0ab43e7 2018-03-16 stsp accum_buf = malloc(max_size);
1217 e0ab43e7 2018-03-16 stsp if (accum_buf == NULL)
1218 638f9024 2019-05-13 stsp return got_error_from_errno("malloc");
1220 e0ab43e7 2018-03-16 stsp /* Deltas are ordered in ascending order. */
1221 e0ab43e7 2018-03-16 stsp SIMPLEQ_FOREACH(delta, &deltas->entries, entry) {
1222 ab2f42e7 2019-11-10 stsp int cached = 1;
1223 e0ab43e7 2018-03-16 stsp if (n == 0) {
1224 0c048b15 2018-04-27 stsp size_t delta_data_offset;
1226 e0ab43e7 2018-03-16 stsp /* Plain object types are the delta base. */
1227 e0ab43e7 2018-03-16 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1228 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1229 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1230 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1231 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1232 72eb3431 2018-04-01 stsp goto done;
1235 0c048b15 2018-04-27 stsp delta_data_offset = delta->offset + delta->tslen;
1236 0c048b15 2018-04-27 stsp if (delta_data_offset >= pack->filesize) {
1237 0c048b15 2018-04-27 stsp err = got_error(GOT_ERR_PACK_OFFSET);
1238 0c048b15 2018-04-27 stsp goto done;
1240 d7464085 2018-07-09 stsp if (pack->map) {
1241 d7464085 2018-07-09 stsp size_t mapoff = (size_t)delta_data_offset;
1242 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&base_buf,
1243 34fca9c3 2018-11-11 stsp &base_bufsz, pack->map, mapoff,
1244 d7464085 2018-07-09 stsp pack->filesize - mapoff);
1246 d7464085 2018-07-09 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET)
1248 638f9024 2019-05-13 stsp err = got_error_from_errno("lseek");
1249 d7464085 2018-07-09 stsp goto done;
1251 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&base_buf,
1252 34fca9c3 2018-11-11 stsp &base_bufsz, pack->fd);
1255 d7464085 2018-07-09 stsp goto done;
1260 ab2f42e7 2019-11-10 stsp got_delta_cache_get(&delta_buf, &delta_len,
1261 ab2f42e7 2019-11-10 stsp pack->delta_cache, delta->data_offset);
1262 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1263 ab2f42e7 2019-11-10 stsp cached = 0;
1264 ab2f42e7 2019-11-10 stsp err = read_delta_data(&delta_buf, &delta_len,
1265 ab2f42e7 2019-11-10 stsp delta->data_offset, pack);
1267 ab2f42e7 2019-11-10 stsp goto done;
1268 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1269 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1270 ab2f42e7 2019-11-10 stsp if (err == NULL)
1271 ab2f42e7 2019-11-10 stsp cached = 1;
1272 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1273 ab2f42e7 2019-11-10 stsp free(delta_buf);
1274 ab2f42e7 2019-11-10 stsp goto done;
1277 34fca9c3 2018-11-11 stsp err = got_delta_apply_in_mem(base_buf, base_bufsz,
1278 42c69117 2019-11-10 stsp delta_buf, delta_len, accum_buf,
1279 34fca9c3 2018-11-11 stsp &accum_size, max_size);
1280 ab2f42e7 2019-11-10 stsp if (!cached)
1281 ab2f42e7 2019-11-10 stsp free(delta_buf);
1284 e0ab43e7 2018-03-16 stsp goto done;
1286 e0ab43e7 2018-03-16 stsp if (n < deltas->nentries) {
1287 e0ab43e7 2018-03-16 stsp /* Accumulated delta becomes the new base. */
1288 e0ab43e7 2018-03-16 stsp uint8_t *tmp = accum_buf;
1290 34fca9c3 2018-11-11 stsp * Base buffer switches roles with accumulation buffer.
1291 34fca9c3 2018-11-11 stsp * Ensure it can hold the largest result in the delta
1292 34fca9c3 2018-11-11 stsp * chain. Initial allocation might have been smaller.
1294 34fca9c3 2018-11-11 stsp if (base_bufsz < max_size) {
1295 34fca9c3 2018-11-11 stsp uint8_t *p;
1296 34fca9c3 2018-11-11 stsp p = reallocarray(base_buf, 1, max_size);
1297 34fca9c3 2018-11-11 stsp if (p == NULL) {
1298 638f9024 2019-05-13 stsp err = got_error_from_errno(
1299 230a42bd 2019-05-11 jcs "reallocarray");
1300 34fca9c3 2018-11-11 stsp goto done;
1302 34fca9c3 2018-11-11 stsp base_buf = p;
1303 34fca9c3 2018-11-11 stsp base_bufsz = max_size;
1305 e0ab43e7 2018-03-16 stsp accum_buf = base_buf;
1306 e0ab43e7 2018-03-16 stsp base_buf = tmp;
1311 e0ab43e7 2018-03-16 stsp free(base_buf);
1312 e0ab43e7 2018-03-16 stsp if (err) {
1313 e0ab43e7 2018-03-16 stsp free(accum_buf);
1314 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1315 e0ab43e7 2018-03-16 stsp *outlen = 0;
1317 e0ab43e7 2018-03-16 stsp *outbuf = accum_buf;
1318 e0ab43e7 2018-03-16 stsp *outlen = accum_size;
1320 efd2a263 2018-01-19 stsp return err;
1323 3ee5fc21 2018-01-17 stsp const struct got_error *
1324 24140570 2018-09-09 stsp got_packfile_extract_object(struct got_pack *pack, struct got_object *obj,
1325 3840f4c9 2018-09-12 stsp FILE *outfile, FILE *base_file, FILE *accum_file)
1327 3ee5fc21 2018-01-17 stsp const struct got_error *err = NULL;
1329 3ee5fc21 2018-01-17 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1330 3ee5fc21 2018-01-17 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1332 ef2bccd9 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1333 24140570 2018-09-09 stsp if (obj->pack_offset >= pack->filesize)
1334 24140570 2018-09-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1336 d7464085 2018-07-09 stsp if (pack->map) {
1337 d7464085 2018-07-09 stsp size_t mapoff = (size_t)obj->pack_offset;
1338 d7464085 2018-07-09 stsp err = got_inflate_to_file_mmap(&obj->size, pack->map,
1339 24140570 2018-09-09 stsp mapoff, pack->filesize - mapoff, outfile);
1341 24140570 2018-09-09 stsp if (lseek(pack->fd, obj->pack_offset, SEEK_SET) == -1)
1342 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
1343 24140570 2018-09-09 stsp err = got_inflate_to_file_fd(&obj->size, pack->fd,
1347 2ce68b2f 2018-09-09 stsp err = dump_delta_chain_to_file(&obj->size, &obj->deltas, pack,
1348 3840f4c9 2018-09-12 stsp outfile, base_file, accum_file);
1350 a1fd68d8 2018-01-12 stsp return err;
1353 e0ab43e7 2018-03-16 stsp const struct got_error *
1354 e0ab43e7 2018-03-16 stsp got_packfile_extract_object_to_mem(uint8_t **buf, size_t *len,
1355 7e212e3d 2018-09-09 stsp struct got_object *obj, struct got_pack *pack)
1357 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1359 e0ab43e7 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1360 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1362 48095039 2018-09-09 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1363 7e212e3d 2018-09-09 stsp if (obj->pack_offset >= pack->filesize)
1364 7e212e3d 2018-09-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1365 d7464085 2018-07-09 stsp if (pack->map) {
1366 d7464085 2018-07-09 stsp size_t mapoff = (size_t)obj->pack_offset;
1367 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(buf, len, pack->map,
1368 d7464085 2018-07-09 stsp mapoff, pack->filesize - mapoff);
1370 7e212e3d 2018-09-09 stsp if (lseek(pack->fd, obj->pack_offset, SEEK_SET) == -1)
1371 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
1372 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(buf, len, pack->fd);
1375 48095039 2018-09-09 stsp err = dump_delta_chain_to_mem(buf, len, &obj->deltas, pack);
1377 e0ab43e7 2018-03-16 stsp return err;