2 5aa81393 2020-01-06 stsp * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org>
4 0a0a3048 2018-01-10 stsp * Permission to use, copy, modify, and distribute this software for any
5 0a0a3048 2018-01-10 stsp * purpose with or without fee is hereby granted, provided that the above
6 0a0a3048 2018-01-10 stsp * copyright notice and this permission notice appear in all copies.
8 0a0a3048 2018-01-10 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 0a0a3048 2018-01-10 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 0a0a3048 2018-01-10 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 0a0a3048 2018-01-10 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 0a0a3048 2018-01-10 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 0a0a3048 2018-01-10 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 0a0a3048 2018-01-10 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 a1fd68d8 2018-01-12 stsp #include <sys/types.h>
18 0a0a3048 2018-01-10 stsp #include <sys/stat.h>
19 a1fd68d8 2018-01-12 stsp #include <sys/queue.h>
20 876c234b 2018-09-10 stsp #include <sys/uio.h>
21 57b35b75 2018-06-22 stsp #include <sys/mman.h>
23 7e656b93 2018-03-17 stsp #include <fcntl.h>
24 a1fd68d8 2018-01-12 stsp #include <errno.h>
25 0a0a3048 2018-01-10 stsp #include <stdio.h>
26 a1fd68d8 2018-01-12 stsp #include <stdint.h>
27 0a0a3048 2018-01-10 stsp #include <stdlib.h>
28 0a0a3048 2018-01-10 stsp #include <string.h>
29 0a0a3048 2018-01-10 stsp #include <limits.h>
30 0a0a3048 2018-01-10 stsp #include <sha1.h>
31 0a0a3048 2018-01-10 stsp #include <endian.h>
32 81a12da5 2020-09-09 naddy #include <unistd.h>
33 a1fd68d8 2018-01-12 stsp #include <zlib.h>
34 876c234b 2018-09-10 stsp #include <imsg.h>
36 0a0a3048 2018-01-10 stsp #include "got_error.h"
37 a1fd68d8 2018-01-12 stsp #include "got_object.h"
38 511a516b 2018-05-19 stsp #include "got_opentemp.h"
39 324d37e7 2019-05-11 stsp #include "got_path.h"
41 718b3ab0 2018-03-17 stsp #include "got_lib_sha1.h"
42 718b3ab0 2018-03-17 stsp #include "got_lib_delta.h"
43 ab2f42e7 2019-11-10 stsp #include "got_lib_delta_cache.h"
44 63581804 2018-07-09 stsp #include "got_lib_inflate.h"
45 718b3ab0 2018-03-17 stsp #include "got_lib_object.h"
46 dd88155e 2019-06-29 stsp #include "got_lib_object_parse.h"
47 876c234b 2018-09-10 stsp #include "got_lib_privsep.h"
48 15a94983 2018-12-23 stsp #include "got_lib_pack.h"
50 79b11c62 2018-03-09 stsp #ifndef nitems
51 79b11c62 2018-03-09 stsp #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
55 a1fd68d8 2018-01-12 stsp #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
58 0a0a3048 2018-01-10 stsp static const struct got_error *
59 0a0a3048 2018-01-10 stsp verify_fanout_table(uint32_t *fanout_table)
63 0a0a3048 2018-01-10 stsp for (i = 0; i < 0xff - 1; i++) {
64 a1fd68d8 2018-01-12 stsp if (be32toh(fanout_table[i]) > be32toh(fanout_table[i + 1]))
65 0a0a3048 2018-01-10 stsp return got_error(GOT_ERR_BAD_PACKIDX);
68 0a0a3048 2018-01-10 stsp return NULL;
71 1510f469 2018-09-09 stsp const struct got_error *
72 817c5a18 2018-09-09 stsp got_packidx_init_hdr(struct got_packidx *p, int verify)
74 0a0a3048 2018-01-10 stsp const struct got_error *err = NULL;
75 817c5a18 2018-09-09 stsp struct got_packidx_v2_hdr *h;
76 0ebaf008 2018-01-10 stsp SHA1_CTX ctx;
77 0ebaf008 2018-01-10 stsp uint8_t sha1[SHA1_DIGEST_LENGTH];
78 817c5a18 2018-09-09 stsp size_t nobj, len_fanout, len_ids, offset, remain;
82 0ebaf008 2018-01-10 stsp SHA1Init(&ctx);
84 57b35b75 2018-06-22 stsp h = &p->hdr;
86 57b35b75 2018-06-22 stsp remain = p->len;
88 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->magic)) {
89 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
93 fc79a48d 2018-07-09 stsp h->magic = (uint32_t *)(p->map + offset);
95 fc79a48d 2018-07-09 stsp h->magic = malloc(sizeof(*h->magic));
96 fc79a48d 2018-07-09 stsp if (h->magic == NULL) {
97 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
100 fc79a48d 2018-07-09 stsp n = read(p->fd, h->magic, sizeof(*h->magic));
101 b1317e77 2019-09-22 stsp if (n < 0) {
102 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
104 b1317e77 2019-09-22 stsp } else if (n != sizeof(*h->magic)) {
105 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
109 78fb0967 2020-09-09 naddy if (be32toh(*h->magic) != GOT_PACKIDX_V2_MAGIC) {
110 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
113 57b35b75 2018-06-22 stsp offset += sizeof(*h->magic);
114 57b35b75 2018-06-22 stsp remain -= sizeof(*h->magic);
116 0cb74cf4 2018-07-08 stsp if (verify)
117 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->magic, sizeof(*h->magic));
119 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->version)) {
120 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
123 fc79a48d 2018-07-09 stsp if (p->map)
124 fc79a48d 2018-07-09 stsp h->version = (uint32_t *)(p->map + offset);
126 fc79a48d 2018-07-09 stsp h->version = malloc(sizeof(*h->version));
127 fc79a48d 2018-07-09 stsp if (h->version == NULL) {
128 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
131 fc79a48d 2018-07-09 stsp n = read(p->fd, h->version, sizeof(*h->version));
132 c6368c2e 2019-10-11 stsp if (n < 0) {
133 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
135 c6368c2e 2019-10-11 stsp } else if (n != sizeof(*h->version)) {
136 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
140 78fb0967 2020-09-09 naddy if (be32toh(*h->version) != GOT_PACKIDX_VERSION) {
141 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
144 57b35b75 2018-06-22 stsp offset += sizeof(*h->version);
145 57b35b75 2018-06-22 stsp remain -= sizeof(*h->version);
147 0cb74cf4 2018-07-08 stsp if (verify)
148 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->version, sizeof(*h->version));
150 57b35b75 2018-06-22 stsp len_fanout =
151 57b35b75 2018-06-22 stsp sizeof(*h->fanout_table) * GOT_PACKIDX_V2_FANOUT_TABLE_ITEMS;
152 57b35b75 2018-06-22 stsp if (remain < len_fanout) {
153 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
156 fc79a48d 2018-07-09 stsp if (p->map)
157 fc79a48d 2018-07-09 stsp h->fanout_table = (uint32_t *)(p->map + offset);
159 fc79a48d 2018-07-09 stsp h->fanout_table = malloc(len_fanout);
160 fc79a48d 2018-07-09 stsp if (h->fanout_table == NULL) {
161 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
164 fc79a48d 2018-07-09 stsp n = read(p->fd, h->fanout_table, len_fanout);
165 c6368c2e 2019-10-11 stsp if (n < 0) {
166 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
168 c6368c2e 2019-10-11 stsp } else if (n != len_fanout) {
169 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
173 c8262310 2018-06-04 stsp err = verify_fanout_table(h->fanout_table);
176 0cb74cf4 2018-07-08 stsp if (verify)
177 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->fanout_table, len_fanout);
178 57b35b75 2018-06-22 stsp offset += len_fanout;
179 57b35b75 2018-06-22 stsp remain -= len_fanout;
181 78fb0967 2020-09-09 naddy nobj = be32toh(h->fanout_table[0xff]);
182 57b35b75 2018-06-22 stsp len_ids = nobj * sizeof(*h->sorted_ids);
183 57b35b75 2018-06-22 stsp if (len_ids <= nobj || len_ids > remain) {
184 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
187 fc79a48d 2018-07-09 stsp if (p->map)
188 fc79a48d 2018-07-09 stsp h->sorted_ids =
189 fc79a48d 2018-07-09 stsp (struct got_packidx_object_id *)((uint8_t*)(p->map + offset));
191 fc79a48d 2018-07-09 stsp h->sorted_ids = malloc(len_ids);
192 fc79a48d 2018-07-09 stsp if (h->sorted_ids == NULL) {
193 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
196 fc79a48d 2018-07-09 stsp n = read(p->fd, h->sorted_ids, len_ids);
198 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
199 faaa1c0f 2018-09-15 stsp else if (n != len_ids) {
200 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
204 0cb74cf4 2018-07-08 stsp if (verify)
205 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->sorted_ids, len_ids);
206 57b35b75 2018-06-22 stsp offset += len_ids;
207 57b35b75 2018-06-22 stsp remain -= len_ids;
209 57b35b75 2018-06-22 stsp if (remain < nobj * sizeof(*h->crc32)) {
210 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
213 fc79a48d 2018-07-09 stsp if (p->map)
214 fc79a48d 2018-07-09 stsp h->crc32 = (uint32_t *)((uint8_t*)(p->map + offset));
216 fc79a48d 2018-07-09 stsp h->crc32 = malloc(nobj * sizeof(*h->crc32));
217 fc79a48d 2018-07-09 stsp if (h->crc32 == NULL) {
218 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
221 fc79a48d 2018-07-09 stsp n = read(p->fd, h->crc32, nobj * sizeof(*h->crc32));
223 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
224 faaa1c0f 2018-09-15 stsp else if (n != nobj * sizeof(*h->crc32)) {
225 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
229 0cb74cf4 2018-07-08 stsp if (verify)
230 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->crc32, nobj * sizeof(*h->crc32));
231 57b35b75 2018-06-22 stsp remain -= nobj * sizeof(*h->crc32);
232 57b35b75 2018-06-22 stsp offset += nobj * sizeof(*h->crc32);
234 57b35b75 2018-06-22 stsp if (remain < nobj * sizeof(*h->offsets)) {
235 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
238 fc79a48d 2018-07-09 stsp if (p->map)
239 fc79a48d 2018-07-09 stsp h->offsets = (uint32_t *)((uint8_t*)(p->map + offset));
241 fc79a48d 2018-07-09 stsp h->offsets = malloc(nobj * sizeof(*h->offsets));
242 fc79a48d 2018-07-09 stsp if (h->offsets == NULL) {
243 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
246 fc79a48d 2018-07-09 stsp n = read(p->fd, h->offsets, nobj * sizeof(*h->offsets));
248 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
249 faaa1c0f 2018-09-15 stsp else if (n != nobj * sizeof(*h->offsets)) {
250 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
254 0cb74cf4 2018-07-08 stsp if (verify)
255 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->offsets,
256 0cb74cf4 2018-07-08 stsp nobj * sizeof(*h->offsets));
257 57b35b75 2018-06-22 stsp remain -= nobj * sizeof(*h->offsets);
258 57b35b75 2018-06-22 stsp offset += nobj * sizeof(*h->offsets);
260 0a0a3048 2018-01-10 stsp /* Large file offsets are contained only in files > 2GB. */
261 5e6be232 2019-11-08 stsp for (i = 0; i < nobj; i++) {
262 78fb0967 2020-09-09 naddy uint32_t o = be32toh(h->offsets[i]);
263 5e6be232 2019-11-08 stsp if (o & GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX)
264 5e6be232 2019-11-08 stsp p->nlargeobj++;
266 5e6be232 2019-11-08 stsp if (p->nlargeobj == 0)
267 0a0a3048 2018-01-10 stsp goto checksum;
269 5e6be232 2019-11-08 stsp if (remain < p->nlargeobj * sizeof(*h->large_offsets)) {
270 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
273 fc79a48d 2018-07-09 stsp if (p->map)
274 fc79a48d 2018-07-09 stsp h->large_offsets = (uint64_t *)((uint8_t*)(p->map + offset));
276 5e6be232 2019-11-08 stsp h->large_offsets = malloc(p->nlargeobj *
277 5e6be232 2019-11-08 stsp sizeof(*h->large_offsets));
278 de30857e 2019-08-23 stsp if (h->large_offsets == NULL) {
279 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
282 fc79a48d 2018-07-09 stsp n = read(p->fd, h->large_offsets,
283 5e6be232 2019-11-08 stsp p->nlargeobj * sizeof(*h->large_offsets));
285 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
286 5e6be232 2019-11-08 stsp else if (n != p->nlargeobj * sizeof(*h->large_offsets)) {
287 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
291 0cb74cf4 2018-07-08 stsp if (verify)
292 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t*)h->large_offsets,
293 5e6be232 2019-11-08 stsp p->nlargeobj * sizeof(*h->large_offsets));
294 5e6be232 2019-11-08 stsp remain -= p->nlargeobj * sizeof(*h->large_offsets);
295 5e6be232 2019-11-08 stsp offset += p->nlargeobj * sizeof(*h->large_offsets);
298 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->trailer)) {
299 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
302 fc79a48d 2018-07-09 stsp if (p->map)
303 fc79a48d 2018-07-09 stsp h->trailer =
304 fc79a48d 2018-07-09 stsp (struct got_packidx_trailer *)((uint8_t*)(p->map + offset));
306 fc79a48d 2018-07-09 stsp h->trailer = malloc(sizeof(*h->trailer));
307 fc79a48d 2018-07-09 stsp if (h->trailer == NULL) {
308 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
311 fc79a48d 2018-07-09 stsp n = read(p->fd, h->trailer, sizeof(*h->trailer));
313 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
314 faaa1c0f 2018-09-15 stsp else if (n != sizeof(*h->trailer)) {
315 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
319 0cb74cf4 2018-07-08 stsp if (verify) {
320 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, h->trailer->packfile_sha1, SHA1_DIGEST_LENGTH);
321 0cb74cf4 2018-07-08 stsp SHA1Final(sha1, &ctx);
322 0cb74cf4 2018-07-08 stsp if (memcmp(h->trailer->packidx_sha1, sha1,
323 0cb74cf4 2018-07-08 stsp SHA1_DIGEST_LENGTH) != 0)
324 0cb74cf4 2018-07-08 stsp err = got_error(GOT_ERR_PACKIDX_CSUM);
327 817c5a18 2018-09-09 stsp return err;
330 817c5a18 2018-09-09 stsp const struct got_error *
331 817c5a18 2018-09-09 stsp got_packidx_open(struct got_packidx **packidx, const char *path, int verify)
333 817c5a18 2018-09-09 stsp const struct got_error *err = NULL;
334 817c5a18 2018-09-09 stsp struct got_packidx *p;
335 57377f07 2019-05-23 stsp struct stat sb;
337 817c5a18 2018-09-09 stsp *packidx = NULL;
339 817c5a18 2018-09-09 stsp p = calloc(1, sizeof(*p));
340 817c5a18 2018-09-09 stsp if (p == NULL)
341 638f9024 2019-05-13 stsp return got_error_from_errno("calloc");
343 a5b57ccf 2019-04-11 stsp p->fd = open(path, O_RDONLY | O_NOFOLLOW);
344 6772cf22 2019-08-28 hiltjo if (p->fd == -1) {
345 6772cf22 2019-08-28 hiltjo err = got_error_from_errno2("open", path);
347 6772cf22 2019-08-28 hiltjo return err;
350 57377f07 2019-05-23 stsp if (fstat(p->fd, &sb) != 0) {
351 57377f07 2019-05-23 stsp err = got_error_from_errno2("fstat", path);
352 817c5a18 2018-09-09 stsp close(p->fd);
354 817c5a18 2018-09-09 stsp return err;
356 57377f07 2019-05-23 stsp p->len = sb.st_size;
357 817c5a18 2018-09-09 stsp if (p->len < sizeof(p->hdr)) {
358 817c5a18 2018-09-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
359 817c5a18 2018-09-09 stsp close(p->fd);
361 817c5a18 2018-09-09 stsp return err;
364 817c5a18 2018-09-09 stsp p->path_packidx = strdup(path);
365 817c5a18 2018-09-09 stsp if (p->path_packidx == NULL) {
366 638f9024 2019-05-13 stsp err = got_error_from_errno("strdup");
370 817c5a18 2018-09-09 stsp #ifndef GOT_PACK_NO_MMAP
371 817c5a18 2018-09-09 stsp p->map = mmap(NULL, p->len, PROT_READ, MAP_PRIVATE, p->fd, 0);
372 3a11398b 2019-02-21 stsp if (p->map == MAP_FAILED) {
373 3a11398b 2019-02-21 stsp if (errno != ENOMEM) {
374 638f9024 2019-05-13 stsp err = got_error_from_errno("mmap");
377 817c5a18 2018-09-09 stsp p->map = NULL; /* fall back to read(2) */
381 817c5a18 2018-09-09 stsp err = got_packidx_init_hdr(p, verify);
384 0a0a3048 2018-01-10 stsp got_packidx_close(p);
386 0a0a3048 2018-01-10 stsp *packidx = p;
388 0a0a3048 2018-01-10 stsp return err;
391 57b35b75 2018-06-22 stsp const struct got_error *
392 6fd11751 2018-06-04 stsp got_packidx_close(struct got_packidx *packidx)
394 57b35b75 2018-06-22 stsp const struct got_error *err = NULL;
396 6fd11751 2018-06-04 stsp free(packidx->path_packidx);
397 fc79a48d 2018-07-09 stsp if (packidx->map) {
398 57b35b75 2018-06-22 stsp if (munmap(packidx->map, packidx->len) == -1)
399 638f9024 2019-05-13 stsp err = got_error_from_errno("munmap");
401 fc79a48d 2018-07-09 stsp free(packidx->hdr.magic);
402 fc79a48d 2018-07-09 stsp free(packidx->hdr.version);
403 fc79a48d 2018-07-09 stsp free(packidx->hdr.fanout_table);
404 fc79a48d 2018-07-09 stsp free(packidx->hdr.sorted_ids);
405 fc79a48d 2018-07-09 stsp free(packidx->hdr.crc32);
406 fc79a48d 2018-07-09 stsp free(packidx->hdr.offsets);
407 fc79a48d 2018-07-09 stsp free(packidx->hdr.large_offsets);
408 fc79a48d 2018-07-09 stsp free(packidx->hdr.trailer);
410 3a6ce05a 2019-02-11 stsp if (close(packidx->fd) != 0 && err == NULL)
411 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
412 0a0a3048 2018-01-10 stsp free(packidx);
414 57b35b75 2018-06-22 stsp return err;
417 a1fd68d8 2018-01-12 stsp static off_t
418 6fd11751 2018-06-04 stsp get_object_offset(struct got_packidx *packidx, int idx)
420 78fb0967 2020-09-09 naddy uint32_t offset = be32toh(packidx->hdr.offsets[idx]);
421 a1fd68d8 2018-01-12 stsp if (offset & GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX) {
422 a1fd68d8 2018-01-12 stsp uint64_t loffset;
423 a1fd68d8 2018-01-12 stsp idx = offset & GOT_PACKIDX_OFFSET_VAL_MASK;
424 5e6be232 2019-11-08 stsp if (idx < 0 || idx >= packidx->nlargeobj ||
425 6fd11751 2018-06-04 stsp packidx->hdr.large_offsets == NULL)
427 78fb0967 2020-09-09 naddy loffset = be64toh(packidx->hdr.large_offsets[idx]);
428 a1fd68d8 2018-01-12 stsp return (loffset > INT64_MAX ? -1 : (off_t)loffset);
430 a1fd68d8 2018-01-12 stsp return (off_t)(offset & GOT_PACKIDX_OFFSET_VAL_MASK);
434 00927983 2020-04-19 stsp got_packidx_get_object_idx(struct got_packidx *packidx, struct got_object_id *id)
436 00927983 2020-04-19 stsp u_int8_t id0 = id->sha1[0];
437 78fb0967 2020-09-09 naddy uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
438 40aeb19c 2018-06-22 stsp int left = 0, right = totobj - 1;
440 a1fd68d8 2018-01-12 stsp if (id0 > 0)
441 78fb0967 2020-09-09 naddy left = be32toh(packidx->hdr.fanout_table[id0 - 1]);
443 40aeb19c 2018-06-22 stsp while (left <= right) {
444 57b35b75 2018-06-22 stsp struct got_packidx_object_id *oid;
445 40aeb19c 2018-06-22 stsp int i, cmp;
447 40aeb19c 2018-06-22 stsp i = ((left + right) / 2);
448 40aeb19c 2018-06-22 stsp oid = &packidx->hdr.sorted_ids[i];
449 00927983 2020-04-19 stsp cmp = memcmp(id->sha1, oid->sha1, SHA1_DIGEST_LENGTH);
450 16dcbf91 2018-04-01 stsp if (cmp == 0)
452 40aeb19c 2018-06-22 stsp else if (cmp > 0)
453 40aeb19c 2018-06-22 stsp left = i + 1;
454 40aeb19c 2018-06-22 stsp else if (cmp < 0)
455 40aeb19c 2018-06-22 stsp right = i - 1;
461 876c234b 2018-09-10 stsp const struct got_error *
462 dd88155e 2019-06-29 stsp got_packidx_match_id_str_prefix(struct got_object_id_queue *matched_ids,
463 4277420a 2019-06-29 stsp struct got_packidx *packidx, const char *id_str_prefix)
465 dd88155e 2019-06-29 stsp const struct got_error *err = NULL;
466 4277420a 2019-06-29 stsp u_int8_t id0;
467 78fb0967 2020-09-09 naddy uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
468 4277420a 2019-06-29 stsp char hex[3];
469 4277420a 2019-06-29 stsp size_t prefix_len = strlen(id_str_prefix);
470 e09a504c 2019-06-28 stsp struct got_packidx_object_id *oid;
471 5a17689a 2020-09-24 stsp uint32_t i;
473 dd88155e 2019-06-29 stsp SIMPLEQ_INIT(matched_ids);
475 4277420a 2019-06-29 stsp if (prefix_len < 2)
476 6dd1ece6 2019-11-10 stsp return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
478 4277420a 2019-06-29 stsp hex[0] = id_str_prefix[0];
479 4277420a 2019-06-29 stsp hex[1] = id_str_prefix[1];
480 4277420a 2019-06-29 stsp hex[2] = '\0';
481 4277420a 2019-06-29 stsp if (!got_parse_xdigit(&id0, hex))
482 6dd1ece6 2019-11-10 stsp return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
484 78fb0967 2020-09-09 naddy i = be32toh(packidx->hdr.fanout_table[id0 - 1]);
485 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[i];
486 4277420a 2019-06-29 stsp while (i < totobj && oid->sha1[0] == id0) {
487 4277420a 2019-06-29 stsp char id_str[SHA1_DIGEST_STRING_LENGTH];
488 dd88155e 2019-06-29 stsp struct got_object_qid *qid;
491 4277420a 2019-06-29 stsp if (!got_sha1_digest_to_str(oid->sha1, id_str, sizeof(id_str)))
492 4277420a 2019-06-29 stsp return got_error(GOT_ERR_NO_SPACE);
494 4277420a 2019-06-29 stsp cmp = strncmp(id_str, id_str_prefix, prefix_len);
495 4277420a 2019-06-29 stsp if (cmp < 0) {
496 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[++i];
498 4277420a 2019-06-29 stsp } else if (cmp > 0)
501 dd88155e 2019-06-29 stsp err = got_object_qid_alloc_partial(&qid);
504 dd88155e 2019-06-29 stsp memcpy(qid->id->sha1, oid->sha1, SHA1_DIGEST_LENGTH);
505 dd88155e 2019-06-29 stsp SIMPLEQ_INSERT_TAIL(matched_ids, qid, entry);
507 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[++i];
511 0adc7bcc 2019-06-29 stsp got_object_id_queue_free(matched_ids);
512 dd88155e 2019-06-29 stsp return err;
515 e09a504c 2019-06-28 stsp const struct got_error *
516 876c234b 2018-09-10 stsp got_pack_stop_privsep_child(struct got_pack *pack)
518 96732e0b 2018-11-11 stsp const struct got_error *err = NULL;
520 876c234b 2018-09-10 stsp if (pack->privsep_child == NULL)
521 876c234b 2018-09-10 stsp return NULL;
523 876c234b 2018-09-10 stsp err = got_privsep_send_stop(pack->privsep_child->imsg_fd);
525 96732e0b 2018-11-11 stsp return err;
526 96732e0b 2018-11-11 stsp err = got_privsep_wait_for_child(pack->privsep_child->pid);
527 0dd5271b 2019-05-10 stsp if (close(pack->privsep_child->imsg_fd) != 0 && err == NULL)
528 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
529 876c234b 2018-09-10 stsp free(pack->privsep_child);
530 876c234b 2018-09-10 stsp pack->privsep_child = NULL;
531 876c234b 2018-09-10 stsp return err;
534 d7464085 2018-07-09 stsp const struct got_error *
535 7e656b93 2018-03-17 stsp got_pack_close(struct got_pack *pack)
537 d7464085 2018-07-09 stsp const struct got_error *err = NULL;
539 876c234b 2018-09-10 stsp err = got_pack_stop_privsep_child(pack);
540 876c234b 2018-09-10 stsp if (pack->map && munmap(pack->map, pack->filesize) == -1 && !err)
541 638f9024 2019-05-13 stsp err = got_error_from_errno("munmap");
542 3a6ce05a 2019-02-11 stsp if (pack->fd != -1 && close(pack->fd) != 0 && err == NULL)
543 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
544 8b2180d4 2018-04-26 stsp pack->fd = -1;
545 4589e373 2018-03-17 stsp free(pack->path_packfile);
546 4589e373 2018-03-17 stsp pack->path_packfile = NULL;
547 4589e373 2018-03-17 stsp pack->filesize = 0;
548 ab2f42e7 2019-11-10 stsp if (pack->delta_cache) {
549 ab2f42e7 2019-11-10 stsp got_delta_cache_free(pack->delta_cache);
550 ab2f42e7 2019-11-10 stsp pack->delta_cache = NULL;
553 c7fe698a 2018-01-23 stsp return err;
556 668a20f6 2020-03-18 stsp const struct got_error *
557 668a20f6 2020-03-18 stsp got_pack_parse_object_type_and_size(uint8_t *type, uint64_t *size, size_t *len,
558 d7464085 2018-07-09 stsp struct got_pack *pack, off_t offset)
560 a487c1d0 2018-01-14 stsp uint8_t t = 0;
561 a487c1d0 2018-01-14 stsp uint64_t s = 0;
562 a487c1d0 2018-01-14 stsp uint8_t sizeN;
563 d7464085 2018-07-09 stsp size_t mapoff = 0;
568 d7464085 2018-07-09 stsp if (offset >= pack->filesize)
569 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
571 d7464085 2018-07-09 stsp if (pack->map) {
572 d7464085 2018-07-09 stsp mapoff = (size_t)offset;
574 d7464085 2018-07-09 stsp if (lseek(pack->fd, offset, SEEK_SET) == -1)
575 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
579 a1fd68d8 2018-01-12 stsp /* We do not support size values which don't fit in 64 bit. */
581 a487c1d0 2018-01-14 stsp return got_error(GOT_ERR_NO_SPACE);
583 d7464085 2018-07-09 stsp if (pack->map) {
584 d7464085 2018-07-09 stsp sizeN = *(pack->map + mapoff);
585 d7464085 2018-07-09 stsp mapoff += sizeof(sizeN);
587 d7464085 2018-07-09 stsp ssize_t n = read(pack->fd, &sizeN, sizeof(sizeN));
589 638f9024 2019-05-13 stsp return got_error_from_errno("read");
590 d7464085 2018-07-09 stsp if (n != sizeof(sizeN))
591 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
593 d7464085 2018-07-09 stsp *len += sizeof(sizeN);
595 a1fd68d8 2018-01-12 stsp if (i == 0) {
596 a487c1d0 2018-01-14 stsp t = (sizeN & GOT_PACK_OBJ_SIZE0_TYPE_MASK) >>
597 a1fd68d8 2018-01-12 stsp GOT_PACK_OBJ_SIZE0_TYPE_MASK_SHIFT;
598 a487c1d0 2018-01-14 stsp s = (sizeN & GOT_PACK_OBJ_SIZE0_VAL_MASK);
600 a1fd68d8 2018-01-12 stsp size_t shift = 4 + 7 * (i - 1);
601 a487c1d0 2018-01-14 stsp s |= ((sizeN & GOT_PACK_OBJ_SIZE_VAL_MASK) << shift);
604 a1fd68d8 2018-01-12 stsp } while (sizeN & GOT_PACK_OBJ_SIZE_MORE);
608 a487c1d0 2018-01-14 stsp return NULL;
611 a1fd68d8 2018-01-12 stsp static const struct got_error *
612 5f25cc85 2019-11-26 stsp open_plain_object(struct got_object **obj, struct got_object_id *id,
613 5f25cc85 2019-11-26 stsp uint8_t type, off_t offset, size_t size, int idx)
615 6ccb713b 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
616 6ccb713b 2018-01-19 stsp if (*obj == NULL)
617 638f9024 2019-05-13 stsp return got_error_from_errno("calloc");
619 6ccb713b 2018-01-19 stsp (*obj)->type = type;
620 6ccb713b 2018-01-19 stsp (*obj)->flags = GOT_OBJ_FLAG_PACKED;
621 c59b3346 2018-09-11 stsp (*obj)->pack_idx = idx;
622 6ccb713b 2018-01-19 stsp (*obj)->hdrlen = 0;
623 6ccb713b 2018-01-19 stsp (*obj)->size = size;
624 106807b4 2018-09-15 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
625 6ccb713b 2018-01-19 stsp (*obj)->pack_offset = offset;
627 b107e67f 2018-01-19 stsp return NULL;
630 b107e67f 2018-01-19 stsp static const struct got_error *
631 d7464085 2018-07-09 stsp parse_negative_offset(int64_t *offset, size_t *len, struct got_pack *pack,
632 d7464085 2018-07-09 stsp off_t delta_offset)
634 b107e67f 2018-01-19 stsp int64_t o = 0;
635 b107e67f 2018-01-19 stsp uint8_t offN;
638 a0de39f3 2019-08-09 stsp *offset = 0;
642 b107e67f 2018-01-19 stsp /* We do not support offset values which don't fit in 64 bit. */
644 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_NO_SPACE);
646 d7464085 2018-07-09 stsp if (pack->map) {
647 d7464085 2018-07-09 stsp size_t mapoff;
648 d7464085 2018-07-09 stsp if (delta_offset >= pack->filesize)
649 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
650 d7464085 2018-07-09 stsp mapoff = (size_t)delta_offset + *len;
651 d7464085 2018-07-09 stsp offN = *(pack->map + mapoff);
654 d7464085 2018-07-09 stsp n = read(pack->fd, &offN, sizeof(offN));
656 638f9024 2019-05-13 stsp return got_error_from_errno("read");
657 d7464085 2018-07-09 stsp if (n != sizeof(offN))
658 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
660 d7464085 2018-07-09 stsp *len += sizeof(offN);
662 b107e67f 2018-01-19 stsp if (i == 0)
663 b107e67f 2018-01-19 stsp o = (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
667 cecc778e 2018-01-23 stsp o += (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
670 b107e67f 2018-01-19 stsp } while (offN & GOT_PACK_OBJ_DELTA_OFF_MORE);
672 b107e67f 2018-01-19 stsp *offset = o;
673 6ccb713b 2018-01-19 stsp return NULL;
676 668a20f6 2020-03-18 stsp const struct got_error *
677 668a20f6 2020-03-18 stsp got_pack_parse_offset_delta(off_t *base_offset, size_t *len, struct got_pack *pack,
678 d7464085 2018-07-09 stsp off_t offset, int tslen)
680 96f5e8b3 2018-01-23 stsp const struct got_error *err;
681 b107e67f 2018-01-19 stsp int64_t negoffset;
682 b107e67f 2018-01-19 stsp size_t negofflen;
686 d7464085 2018-07-09 stsp err = parse_negative_offset(&negoffset, &negofflen, pack,
687 d7464085 2018-07-09 stsp offset + tslen);
689 b107e67f 2018-01-19 stsp return err;
691 b107e67f 2018-01-19 stsp /* Compute the base object's offset (must be in the same pack file). */
692 96f5e8b3 2018-01-23 stsp *base_offset = (offset - negoffset);
693 96f5e8b3 2018-01-23 stsp if (*base_offset <= 0)
694 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_BAD_PACKFILE);
696 d7464085 2018-07-09 stsp *len = negofflen;
697 96f5e8b3 2018-01-23 stsp return NULL;
700 0e22967e 2018-02-11 stsp static const struct got_error *
701 42c69117 2019-11-10 stsp read_delta_data(uint8_t **delta_buf, size_t *delta_len,
702 42c69117 2019-11-10 stsp size_t delta_data_offset, struct got_pack *pack)
704 42c69117 2019-11-10 stsp const struct got_error *err = NULL;
706 42c69117 2019-11-10 stsp if (pack->map) {
707 42c69117 2019-11-10 stsp if (delta_data_offset >= pack->filesize)
708 42c69117 2019-11-10 stsp return got_error(GOT_ERR_PACK_OFFSET);
709 2e5a6fad 2020-03-18 stsp err = got_inflate_to_mem_mmap(delta_buf, delta_len,
710 2e5a6fad 2020-03-18 stsp NULL, NULL, pack->map, delta_data_offset,
711 2e5a6fad 2020-03-18 stsp pack->filesize - delta_data_offset);
713 42c69117 2019-11-10 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET) == -1)
714 42c69117 2019-11-10 stsp return got_error_from_errno("lseek");
715 3ab5e33c 2020-03-18 stsp err = got_inflate_to_mem_fd(delta_buf, delta_len, NULL,
716 55fdd257 2020-03-18 stsp NULL, 0, pack->fd);
718 42c69117 2019-11-10 stsp return err;
721 96f5e8b3 2018-01-23 stsp static const struct got_error *
722 c336f889 2018-07-23 stsp add_delta(struct got_delta_chain *deltas, off_t delta_offset, size_t tslen,
723 42c69117 2019-11-10 stsp int delta_type, size_t delta_size, size_t delta_data_offset)
725 bdd2fbb3 2018-02-11 stsp struct got_delta *delta;
727 c336f889 2018-07-23 stsp delta = got_delta_open(delta_offset, tslen, delta_type, delta_size,
728 42c69117 2019-11-10 stsp delta_data_offset);
729 bdd2fbb3 2018-02-11 stsp if (delta == NULL)
730 638f9024 2019-05-13 stsp return got_error_from_errno("got_delta_open");
731 bdd2fbb3 2018-02-11 stsp /* delta is freed in got_object_close() */
732 bdd2fbb3 2018-02-11 stsp deltas->nentries++;
733 bdd2fbb3 2018-02-11 stsp SIMPLEQ_INSERT_HEAD(&deltas->entries, delta, entry);
734 bdd2fbb3 2018-02-11 stsp return NULL;
737 bdd2fbb3 2018-02-11 stsp static const struct got_error *
738 6b9c9673 2018-01-23 stsp resolve_offset_delta(struct got_delta_chain *deltas,
739 c8ecd499 2018-09-09 stsp struct got_packidx *packidx, struct got_pack *pack, off_t delta_offset,
740 c8ecd499 2018-09-09 stsp size_t tslen, int delta_type, size_t delta_size, unsigned int recursion)
743 a3500804 2018-01-23 stsp const struct got_error *err;
744 c3703302 2018-01-23 stsp off_t base_offset;
745 c3703302 2018-01-23 stsp uint8_t base_type;
746 c3703302 2018-01-23 stsp uint64_t base_size;
747 c3703302 2018-01-23 stsp size_t base_tslen;
748 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
749 42c69117 2019-11-10 stsp size_t consumed;
751 668a20f6 2020-03-18 stsp err = got_pack_parse_offset_delta(&base_offset, &consumed, pack,
752 d7464085 2018-07-09 stsp delta_offset, tslen);
754 a3500804 2018-01-23 stsp return err;
756 d7464085 2018-07-09 stsp delta_data_offset = delta_offset + tslen + consumed;
757 d7464085 2018-07-09 stsp if (delta_data_offset >= pack->filesize)
758 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
760 d7464085 2018-07-09 stsp if (pack->map == NULL) {
761 d7464085 2018-07-09 stsp delta_data_offset = lseek(pack->fd, 0, SEEK_CUR);
762 d7464085 2018-07-09 stsp if (delta_data_offset == -1)
763 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
766 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type, delta_size,
767 42c69117 2019-11-10 stsp delta_data_offset);
769 1a35c1bc 2019-05-22 stsp return err;
771 c3703302 2018-01-23 stsp /* An offset delta must be in the same packfile. */
772 1a35c1bc 2019-05-22 stsp if (base_offset >= pack->filesize)
773 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_PACK_OFFSET);
775 668a20f6 2020-03-18 stsp err = got_pack_parse_object_type_and_size(&base_type, &base_size,
776 668a20f6 2020-03-18 stsp &base_tslen, pack, base_offset);
778 1a35c1bc 2019-05-22 stsp return err;
780 668a20f6 2020-03-18 stsp return got_pack_resolve_delta_chain(deltas, packidx, pack, base_offset,
781 b0e2201a 2018-06-22 stsp base_tslen, base_type, base_size, recursion - 1);
784 c3703302 2018-01-23 stsp static const struct got_error *
785 c8ecd499 2018-09-09 stsp resolve_ref_delta(struct got_delta_chain *deltas, struct got_packidx *packidx,
786 c8ecd499 2018-09-09 stsp struct got_pack *pack, off_t delta_offset, size_t tslen, int delta_type,
787 c8ecd499 2018-09-09 stsp size_t delta_size, unsigned int recursion)
789 6b9c9673 2018-01-23 stsp const struct got_error *err;
790 6b9c9673 2018-01-23 stsp struct got_object_id id;
792 6b9c9673 2018-01-23 stsp off_t base_offset;
793 6b9c9673 2018-01-23 stsp uint8_t base_type;
794 6b9c9673 2018-01-23 stsp uint64_t base_size;
795 6b9c9673 2018-01-23 stsp size_t base_tslen;
796 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
798 42c69117 2019-11-10 stsp if (delta_offset + tslen >= pack->filesize)
799 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
801 d7464085 2018-07-09 stsp if (pack->map) {
802 42c69117 2019-11-10 stsp size_t mapoff = delta_offset + tslen;
803 d7464085 2018-07-09 stsp memcpy(&id, pack->map + mapoff, sizeof(id));
804 d7464085 2018-07-09 stsp mapoff += sizeof(id);
805 42c69117 2019-11-10 stsp delta_data_offset = (off_t)mapoff;
808 42c69117 2019-11-10 stsp n = read(pack->fd, &id, sizeof(id));
810 638f9024 2019-05-13 stsp return got_error_from_errno("read");
811 d7464085 2018-07-09 stsp if (n != sizeof(id))
812 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
813 e40b19ed 2020-01-06 stsp delta_data_offset = lseek(pack->fd, 0, SEEK_CUR);
814 e40b19ed 2020-01-06 stsp if (delta_data_offset == -1)
815 e40b19ed 2020-01-06 stsp return got_error_from_errno("lseek");
818 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type, delta_size,
819 42c69117 2019-11-10 stsp delta_data_offset);
821 1a35c1bc 2019-05-22 stsp return err;
823 652b2703 2018-06-22 stsp /* Delta base must be in the same pack file. */
824 1510f469 2018-09-09 stsp idx = got_packidx_get_object_idx(packidx, &id);
825 1a35c1bc 2019-05-22 stsp if (idx == -1)
826 668a20f6 2020-03-18 stsp return got_error(GOT_ERR_NO_OBJ);
828 6b9c9673 2018-01-23 stsp base_offset = get_object_offset(packidx, idx);
829 1a35c1bc 2019-05-22 stsp if (base_offset == (uint64_t)-1)
830 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_BAD_PACKIDX);
832 1a35c1bc 2019-05-22 stsp if (base_offset >= pack->filesize)
833 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_PACK_OFFSET);
835 668a20f6 2020-03-18 stsp err = got_pack_parse_object_type_and_size(&base_type, &base_size,
836 668a20f6 2020-03-18 stsp &base_tslen, pack, base_offset);
838 1a35c1bc 2019-05-22 stsp return err;
840 668a20f6 2020-03-18 stsp return got_pack_resolve_delta_chain(deltas, packidx, pack, base_offset,
841 0c048b15 2018-04-27 stsp base_tslen, base_type, base_size, recursion - 1);
844 668a20f6 2020-03-18 stsp const struct got_error *
845 668a20f6 2020-03-18 stsp got_pack_resolve_delta_chain(struct got_delta_chain *deltas,
846 668a20f6 2020-03-18 stsp struct got_packidx *packidx, struct got_pack *pack, off_t delta_offset,
847 668a20f6 2020-03-18 stsp size_t tslen, int delta_type, size_t delta_size, unsigned int recursion)
849 c3703302 2018-01-23 stsp const struct got_error *err = NULL;
851 5b7e13a7 2018-04-02 stsp if (--recursion == 0)
852 5b7e13a7 2018-04-02 stsp return got_error(GOT_ERR_RECURSION);
854 c3703302 2018-01-23 stsp switch (delta_type) {
855 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_COMMIT:
856 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TREE:
857 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_BLOB:
858 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TAG:
859 c3703302 2018-01-23 stsp /* Plain types are the final delta base. Recursion ends. */
860 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type,
861 42c69117 2019-11-10 stsp delta_size, 0);
863 a3500804 2018-01-23 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
864 c8ecd499 2018-09-09 stsp err = resolve_offset_delta(deltas, packidx, pack,
865 b0e2201a 2018-06-22 stsp delta_offset, tslen, delta_type, delta_size, recursion - 1);
867 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_REF_DELTA:
868 c8ecd499 2018-09-09 stsp err = resolve_ref_delta(deltas, packidx, pack,
869 b0e2201a 2018-06-22 stsp delta_offset, tslen, delta_type, delta_size, recursion - 1);
872 4810de4a 2018-04-01 stsp return got_error(GOT_ERR_OBJ_TYPE);
875 96f5e8b3 2018-01-23 stsp return err;
878 96f5e8b3 2018-01-23 stsp static const struct got_error *
879 a98c62b1 2018-09-09 stsp open_delta_object(struct got_object **obj, struct got_packidx *packidx,
880 a98c62b1 2018-09-09 stsp struct got_pack *pack, struct got_object_id *id, off_t offset,
881 c59b3346 2018-09-11 stsp size_t tslen, int delta_type, size_t delta_size, int idx)
883 96f5e8b3 2018-01-23 stsp const struct got_error *err = NULL;
884 96f5e8b3 2018-01-23 stsp int resolved_type;
886 b107e67f 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
887 b107e67f 2018-01-19 stsp if (*obj == NULL)
888 638f9024 2019-05-13 stsp return got_error_from_errno("calloc");
890 96f5e8b3 2018-01-23 stsp (*obj)->flags = 0;
891 b107e67f 2018-01-19 stsp (*obj)->hdrlen = 0;
892 39e73dc9 2018-03-03 stsp (*obj)->size = 0; /* Not known because deltas aren't applied yet. */
893 106807b4 2018-09-15 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
894 cecc778e 2018-01-23 stsp (*obj)->pack_offset = offset + tslen;
896 1a35c1bc 2019-05-22 stsp SIMPLEQ_INIT(&(*obj)->deltas.entries);
897 1a35c1bc 2019-05-22 stsp (*obj)->flags |= GOT_OBJ_FLAG_DELTIFIED;
898 96f5e8b3 2018-01-23 stsp (*obj)->flags |= GOT_OBJ_FLAG_PACKED;
899 c59b3346 2018-09-11 stsp (*obj)->pack_idx = idx;
901 668a20f6 2020-03-18 stsp err = got_pack_resolve_delta_chain(&(*obj)->deltas, packidx, pack,
902 668a20f6 2020-03-18 stsp offset, tslen, delta_type, delta_size,
903 668a20f6 2020-03-18 stsp GOT_DELTA_CHAIN_RECURSION_MAX);
907 96f5e8b3 2018-01-23 stsp err = got_delta_chain_get_base_type(&resolved_type, &(*obj)->deltas);
910 96f5e8b3 2018-01-23 stsp (*obj)->type = resolved_type;
913 96f5e8b3 2018-01-23 stsp got_object_close(*obj);
914 96f5e8b3 2018-01-23 stsp *obj = NULL;
916 96f5e8b3 2018-01-23 stsp return err;
919 2090a03d 2018-09-09 stsp const struct got_error *
920 2090a03d 2018-09-09 stsp got_packfile_open_object(struct got_object **obj, struct got_pack *pack,
921 6fd11751 2018-06-04 stsp struct got_packidx *packidx, int idx, struct got_object_id *id)
923 a1fd68d8 2018-01-12 stsp const struct got_error *err = NULL;
924 a1fd68d8 2018-01-12 stsp off_t offset;
925 6c00b545 2018-01-17 stsp uint8_t type;
926 6c00b545 2018-01-17 stsp uint64_t size;
927 3ee5fc21 2018-01-17 stsp size_t tslen;
929 6c00b545 2018-01-17 stsp *obj = NULL;
931 a1fd68d8 2018-01-12 stsp offset = get_object_offset(packidx, idx);
932 a1fd68d8 2018-01-12 stsp if (offset == (uint64_t)-1)
933 a1fd68d8 2018-01-12 stsp return got_error(GOT_ERR_BAD_PACKIDX);
935 668a20f6 2020-03-18 stsp err = got_pack_parse_object_type_and_size(&type, &size, &tslen,
936 668a20f6 2020-03-18 stsp pack, offset);
938 35c73765 2018-09-09 stsp return err;
940 6c00b545 2018-01-17 stsp switch (type) {
941 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_COMMIT:
942 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_TREE:
943 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_BLOB:
944 d33fc9ef 2018-01-23 stsp case GOT_OBJ_TYPE_TAG:
945 5f25cc85 2019-11-26 stsp err = open_plain_object(obj, id, type, offset + tslen,
946 5f25cc85 2019-11-26 stsp size, idx);
948 b107e67f 2018-01-19 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
949 a48db7e5 2018-01-23 stsp case GOT_OBJ_TYPE_REF_DELTA:
950 a98c62b1 2018-09-09 stsp err = open_delta_object(obj, packidx, pack, id, offset,
951 c59b3346 2018-09-11 stsp tslen, type, size, idx);
954 4810de4a 2018-04-01 stsp err = got_error(GOT_ERR_OBJ_TYPE);
958 3ee5fc21 2018-01-17 stsp return err;
961 d582f26c 2020-03-18 stsp const struct got_error *
962 d582f26c 2020-03-18 stsp got_pack_get_delta_chain_max_size(uint64_t *max_size, struct got_delta_chain *deltas,
963 42c69117 2019-11-10 stsp struct got_pack *pack)
965 22484865 2018-03-13 stsp struct got_delta *delta;
966 22484865 2018-03-13 stsp uint64_t base_size = 0, result_size = 0;
968 22484865 2018-03-13 stsp *max_size = 0;
969 22484865 2018-03-13 stsp SIMPLEQ_FOREACH(delta, &deltas->entries, entry) {
970 22484865 2018-03-13 stsp /* Plain object types are the delta base. */
971 22484865 2018-03-13 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
972 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TREE &&
973 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
974 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TAG) {
975 22484865 2018-03-13 stsp const struct got_error *err;
976 42c69117 2019-11-10 stsp uint8_t *delta_buf;
977 42c69117 2019-11-10 stsp size_t delta_len;
978 ab2f42e7 2019-11-10 stsp int cached = 1;
980 ab2f42e7 2019-11-10 stsp got_delta_cache_get(&delta_buf, &delta_len,
981 ab2f42e7 2019-11-10 stsp pack->delta_cache, delta->data_offset);
982 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
983 ab2f42e7 2019-11-10 stsp cached = 0;
984 ab2f42e7 2019-11-10 stsp err = read_delta_data(&delta_buf, &delta_len,
985 ab2f42e7 2019-11-10 stsp delta->data_offset, pack);
987 ab2f42e7 2019-11-10 stsp return err;
988 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
989 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
990 ab2f42e7 2019-11-10 stsp if (err == NULL)
991 ab2f42e7 2019-11-10 stsp cached = 1;
992 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
993 ab2f42e7 2019-11-10 stsp free(delta_buf);
994 ab2f42e7 2019-11-10 stsp return err;
997 a53d2f13 2018-03-17 stsp err = got_delta_get_sizes(&base_size, &result_size,
998 42c69117 2019-11-10 stsp delta_buf, delta_len);
999 ab2f42e7 2019-11-10 stsp if (!cached)
1000 ab2f42e7 2019-11-10 stsp free(delta_buf);
1002 22484865 2018-03-13 stsp return err;
1004 22484865 2018-03-13 stsp base_size = delta->size;
1005 22484865 2018-03-13 stsp if (base_size > *max_size)
1006 22484865 2018-03-13 stsp *max_size = base_size;
1007 22484865 2018-03-13 stsp if (result_size > *max_size)
1008 22484865 2018-03-13 stsp *max_size = result_size;
1011 9feb4ff2 2018-03-14 stsp return NULL;
1014 ac544f8c 2019-01-13 stsp const struct got_error *
1015 42c69117 2019-11-10 stsp got_pack_get_max_delta_object_size(uint64_t *size, struct got_object *obj,
1016 42c69117 2019-11-10 stsp struct got_pack *pack)
1018 85a703fa 2019-01-13 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0)
1019 85a703fa 2019-01-13 stsp return got_error(GOT_ERR_OBJ_TYPE);
1021 d582f26c 2020-03-18 stsp return got_pack_get_delta_chain_max_size(size, &obj->deltas, pack);
1024 668a20f6 2020-03-18 stsp const struct got_error *
1025 4788f1ce 2020-03-18 stsp got_pack_dump_delta_chain_to_file(size_t *result_size,
1026 4788f1ce 2020-03-18 stsp struct got_delta_chain *deltas, struct got_pack *pack, FILE *outfile,
1027 4788f1ce 2020-03-18 stsp FILE *base_file, FILE *accum_file)
1029 efd2a263 2018-01-19 stsp const struct got_error *err = NULL;
1030 6691714a 2018-01-23 stsp struct got_delta *delta;
1031 42c69117 2019-11-10 stsp uint8_t *base_buf = NULL, *accum_buf = NULL, *delta_buf;
1032 42c69117 2019-11-10 stsp size_t base_bufsz = 0, accum_size = 0, delta_len;
1033 22484865 2018-03-13 stsp uint64_t max_size;
1034 6691714a 2018-01-23 stsp int n = 0;
1036 b29656e2 2018-03-16 stsp *result_size = 0;
1038 710bb5ca 2018-01-23 stsp if (SIMPLEQ_EMPTY(&deltas->entries))
1039 6691714a 2018-01-23 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
1041 8628c62d 2018-03-15 stsp /* We process small enough files entirely in memory for speed. */
1042 d582f26c 2020-03-18 stsp err = got_pack_get_delta_chain_max_size(&max_size, deltas, pack);
1044 22484865 2018-03-13 stsp return err;
1045 8628c62d 2018-03-15 stsp if (max_size < GOT_DELTA_RESULT_SIZE_CACHED_MAX) {
1046 8628c62d 2018-03-15 stsp accum_buf = malloc(max_size);
1047 8628c62d 2018-03-15 stsp if (accum_buf == NULL)
1048 638f9024 2019-05-13 stsp return got_error_from_errno("malloc");
1049 3840f4c9 2018-09-12 stsp base_file = NULL;
1050 3840f4c9 2018-09-12 stsp accum_file = NULL;
1053 6691714a 2018-01-23 stsp /* Deltas are ordered in ascending order. */
1054 710bb5ca 2018-01-23 stsp SIMPLEQ_FOREACH(delta, &deltas->entries, entry) {
1055 ab2f42e7 2019-11-10 stsp int cached = 1;
1056 a6b158cc 2018-02-11 stsp if (n == 0) {
1057 34fca9c3 2018-11-11 stsp size_t mapoff;
1058 0c048b15 2018-04-27 stsp off_t delta_data_offset;
1060 a6b158cc 2018-02-11 stsp /* Plain object types are the delta base. */
1061 a6b158cc 2018-02-11 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1062 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1063 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1064 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1065 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1066 72eb3431 2018-04-01 stsp goto done;
1069 0c048b15 2018-04-27 stsp delta_data_offset = delta->offset + delta->tslen;
1070 0c048b15 2018-04-27 stsp if (delta_data_offset >= pack->filesize) {
1071 0c048b15 2018-04-27 stsp err = got_error(GOT_ERR_PACK_OFFSET);
1072 0c048b15 2018-04-27 stsp goto done;
1074 d7464085 2018-07-09 stsp if (pack->map == NULL) {
1075 d7464085 2018-07-09 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET)
1077 638f9024 2019-05-13 stsp err = got_error_from_errno("lseek");
1078 d7464085 2018-07-09 stsp goto done;
1081 d7464085 2018-07-09 stsp if (base_file) {
1082 d7464085 2018-07-09 stsp if (pack->map) {
1083 d7464085 2018-07-09 stsp mapoff = (size_t)delta_data_offset;
1084 d7464085 2018-07-09 stsp err = got_inflate_to_file_mmap(
1085 4788f1ce 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->map,
1086 4788f1ce 2020-03-18 stsp mapoff, pack->filesize - mapoff,
1087 4788f1ce 2020-03-18 stsp base_file);
1089 34fca9c3 2018-11-11 stsp err = got_inflate_to_file_fd(
1090 4788f1ce 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->fd,
1091 4788f1ce 2020-03-18 stsp base_file);
1093 d7464085 2018-07-09 stsp if (pack->map) {
1094 d7464085 2018-07-09 stsp mapoff = (size_t)delta_data_offset;
1095 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&base_buf,
1096 2e5a6fad 2020-03-18 stsp &base_bufsz, NULL, NULL,
1097 2e5a6fad 2020-03-18 stsp pack->map, mapoff,
1098 d7464085 2018-07-09 stsp pack->filesize - mapoff);
1100 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&base_buf,
1101 55fdd257 2020-03-18 stsp &base_bufsz, NULL, NULL, max_size,
1102 55fdd257 2020-03-18 stsp pack->fd);
1105 a6b158cc 2018-02-11 stsp goto done;
1107 8628c62d 2018-03-15 stsp if (base_file)
1108 8628c62d 2018-03-15 stsp rewind(base_file);
1112 ab2f42e7 2019-11-10 stsp got_delta_cache_get(&delta_buf, &delta_len,
1113 ab2f42e7 2019-11-10 stsp pack->delta_cache, delta->data_offset);
1114 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1115 ab2f42e7 2019-11-10 stsp cached = 0;
1116 ab2f42e7 2019-11-10 stsp err = read_delta_data(&delta_buf, &delta_len,
1117 ab2f42e7 2019-11-10 stsp delta->data_offset, pack);
1119 ab2f42e7 2019-11-10 stsp goto done;
1120 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1121 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1122 ab2f42e7 2019-11-10 stsp if (err == NULL)
1123 ab2f42e7 2019-11-10 stsp cached = 1;
1124 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1125 ab2f42e7 2019-11-10 stsp free(delta_buf);
1126 ab2f42e7 2019-11-10 stsp goto done;
1129 8628c62d 2018-03-15 stsp if (base_buf) {
1130 34fca9c3 2018-11-11 stsp err = got_delta_apply_in_mem(base_buf, base_bufsz,
1131 42c69117 2019-11-10 stsp delta_buf, delta_len, accum_buf,
1132 34fca9c3 2018-11-11 stsp &accum_size, max_size);
1135 42c69117 2019-11-10 stsp err = got_delta_apply(base_file, delta_buf,
1136 42c69117 2019-11-10 stsp delta_len,
1137 8628c62d 2018-03-15 stsp /* Final delta application writes to output file. */
1138 b29656e2 2018-03-16 stsp ++n < deltas->nentries ? accum_file : outfile,
1139 b29656e2 2018-03-16 stsp &accum_size);
1141 ab2f42e7 2019-11-10 stsp if (!cached)
1142 ab2f42e7 2019-11-10 stsp free(delta_buf);
1144 6691714a 2018-01-23 stsp goto done;
1146 710bb5ca 2018-01-23 stsp if (n < deltas->nentries) {
1147 6691714a 2018-01-23 stsp /* Accumulated delta becomes the new base. */
1148 8628c62d 2018-03-15 stsp if (base_buf) {
1149 8628c62d 2018-03-15 stsp uint8_t *tmp = accum_buf;
1151 34fca9c3 2018-11-11 stsp * Base buffer switches roles with accumulation
1152 34fca9c3 2018-11-11 stsp * buffer. Ensure it can hold the largest
1153 34fca9c3 2018-11-11 stsp * result in the delta chain. The initial
1154 34fca9c3 2018-11-11 stsp * allocation might have been smaller.
1156 34fca9c3 2018-11-11 stsp if (base_bufsz < max_size) {
1157 34fca9c3 2018-11-11 stsp uint8_t *p;
1158 34fca9c3 2018-11-11 stsp p = reallocarray(base_buf, 1, max_size);
1159 34fca9c3 2018-11-11 stsp if (p == NULL) {
1160 638f9024 2019-05-13 stsp err = got_error_from_errno(
1161 230a42bd 2019-05-11 jcs "reallocarray");
1162 34fca9c3 2018-11-11 stsp goto done;
1164 34fca9c3 2018-11-11 stsp base_buf = p;
1165 34fca9c3 2018-11-11 stsp base_bufsz = max_size;
1167 8628c62d 2018-03-15 stsp accum_buf = base_buf;
1168 8628c62d 2018-03-15 stsp base_buf = tmp;
1170 8628c62d 2018-03-15 stsp FILE *tmp = accum_file;
1171 8628c62d 2018-03-15 stsp accum_file = base_file;
1172 8628c62d 2018-03-15 stsp base_file = tmp;
1173 8628c62d 2018-03-15 stsp rewind(base_file);
1174 8628c62d 2018-03-15 stsp rewind(accum_file);
1180 8628c62d 2018-03-15 stsp free(base_buf);
1181 8628c62d 2018-03-15 stsp if (accum_buf) {
1182 8628c62d 2018-03-15 stsp size_t len = fwrite(accum_buf, 1, accum_size, outfile);
1183 8628c62d 2018-03-15 stsp free(accum_buf);
1184 8628c62d 2018-03-15 stsp if (len != accum_size)
1185 673702af 2018-07-23 stsp err = got_ferror(outfile, GOT_ERR_IO);
1187 6691714a 2018-01-23 stsp rewind(outfile);
1188 b29656e2 2018-03-16 stsp if (err == NULL)
1189 b29656e2 2018-03-16 stsp *result_size = accum_size;
1190 e0ab43e7 2018-03-16 stsp return err;
1193 668a20f6 2020-03-18 stsp const struct got_error *
1194 668a20f6 2020-03-18 stsp got_pack_dump_delta_chain_to_mem(uint8_t **outbuf, size_t *outlen,
1195 48095039 2018-09-09 stsp struct got_delta_chain *deltas, struct got_pack *pack)
1197 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1198 e0ab43e7 2018-03-16 stsp struct got_delta *delta;
1199 42c69117 2019-11-10 stsp uint8_t *base_buf = NULL, *accum_buf = NULL, *delta_buf;
1200 42c69117 2019-11-10 stsp size_t base_bufsz = 0, accum_size = 0, delta_len;
1201 e0ab43e7 2018-03-16 stsp uint64_t max_size;
1202 e0ab43e7 2018-03-16 stsp int n = 0;
1204 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1205 e0ab43e7 2018-03-16 stsp *outlen = 0;
1207 e0ab43e7 2018-03-16 stsp if (SIMPLEQ_EMPTY(&deltas->entries))
1208 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
1210 d582f26c 2020-03-18 stsp err = got_pack_get_delta_chain_max_size(&max_size, deltas, pack);
1212 e0ab43e7 2018-03-16 stsp return err;
1213 e0ab43e7 2018-03-16 stsp accum_buf = malloc(max_size);
1214 e0ab43e7 2018-03-16 stsp if (accum_buf == NULL)
1215 638f9024 2019-05-13 stsp return got_error_from_errno("malloc");
1217 e0ab43e7 2018-03-16 stsp /* Deltas are ordered in ascending order. */
1218 e0ab43e7 2018-03-16 stsp SIMPLEQ_FOREACH(delta, &deltas->entries, entry) {
1219 ab2f42e7 2019-11-10 stsp int cached = 1;
1220 e0ab43e7 2018-03-16 stsp if (n == 0) {
1221 0c048b15 2018-04-27 stsp size_t delta_data_offset;
1223 e0ab43e7 2018-03-16 stsp /* Plain object types are the delta base. */
1224 e0ab43e7 2018-03-16 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1225 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1226 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1227 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1228 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1229 72eb3431 2018-04-01 stsp goto done;
1232 0c048b15 2018-04-27 stsp delta_data_offset = delta->offset + delta->tslen;
1233 0c048b15 2018-04-27 stsp if (delta_data_offset >= pack->filesize) {
1234 0c048b15 2018-04-27 stsp err = got_error(GOT_ERR_PACK_OFFSET);
1235 0c048b15 2018-04-27 stsp goto done;
1237 d7464085 2018-07-09 stsp if (pack->map) {
1238 d7464085 2018-07-09 stsp size_t mapoff = (size_t)delta_data_offset;
1239 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&base_buf,
1240 2e5a6fad 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->map,
1241 2e5a6fad 2020-03-18 stsp mapoff, pack->filesize - mapoff);
1243 d7464085 2018-07-09 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET)
1245 638f9024 2019-05-13 stsp err = got_error_from_errno("lseek");
1246 d7464085 2018-07-09 stsp goto done;
1248 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&base_buf,
1249 55fdd257 2020-03-18 stsp &base_bufsz, NULL, NULL, max_size,
1250 55fdd257 2020-03-18 stsp pack->fd);
1253 d7464085 2018-07-09 stsp goto done;
1258 ab2f42e7 2019-11-10 stsp got_delta_cache_get(&delta_buf, &delta_len,
1259 ab2f42e7 2019-11-10 stsp pack->delta_cache, delta->data_offset);
1260 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1261 ab2f42e7 2019-11-10 stsp cached = 0;
1262 ab2f42e7 2019-11-10 stsp err = read_delta_data(&delta_buf, &delta_len,
1263 ab2f42e7 2019-11-10 stsp delta->data_offset, pack);
1265 ab2f42e7 2019-11-10 stsp goto done;
1266 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1267 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1268 ab2f42e7 2019-11-10 stsp if (err == NULL)
1269 ab2f42e7 2019-11-10 stsp cached = 1;
1270 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1271 ab2f42e7 2019-11-10 stsp free(delta_buf);
1272 ab2f42e7 2019-11-10 stsp goto done;
1275 34fca9c3 2018-11-11 stsp err = got_delta_apply_in_mem(base_buf, base_bufsz,
1276 42c69117 2019-11-10 stsp delta_buf, delta_len, accum_buf,
1277 34fca9c3 2018-11-11 stsp &accum_size, max_size);
1278 ab2f42e7 2019-11-10 stsp if (!cached)
1279 ab2f42e7 2019-11-10 stsp free(delta_buf);
1282 e0ab43e7 2018-03-16 stsp goto done;
1284 e0ab43e7 2018-03-16 stsp if (n < deltas->nentries) {
1285 e0ab43e7 2018-03-16 stsp /* Accumulated delta becomes the new base. */
1286 e0ab43e7 2018-03-16 stsp uint8_t *tmp = accum_buf;
1288 34fca9c3 2018-11-11 stsp * Base buffer switches roles with accumulation buffer.
1289 34fca9c3 2018-11-11 stsp * Ensure it can hold the largest result in the delta
1290 34fca9c3 2018-11-11 stsp * chain. Initial allocation might have been smaller.
1292 34fca9c3 2018-11-11 stsp if (base_bufsz < max_size) {
1293 34fca9c3 2018-11-11 stsp uint8_t *p;
1294 34fca9c3 2018-11-11 stsp p = reallocarray(base_buf, 1, max_size);
1295 34fca9c3 2018-11-11 stsp if (p == NULL) {
1296 638f9024 2019-05-13 stsp err = got_error_from_errno(
1297 230a42bd 2019-05-11 jcs "reallocarray");
1298 34fca9c3 2018-11-11 stsp goto done;
1300 34fca9c3 2018-11-11 stsp base_buf = p;
1301 34fca9c3 2018-11-11 stsp base_bufsz = max_size;
1303 e0ab43e7 2018-03-16 stsp accum_buf = base_buf;
1304 e0ab43e7 2018-03-16 stsp base_buf = tmp;
1309 e0ab43e7 2018-03-16 stsp free(base_buf);
1310 e0ab43e7 2018-03-16 stsp if (err) {
1311 e0ab43e7 2018-03-16 stsp free(accum_buf);
1312 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1313 e0ab43e7 2018-03-16 stsp *outlen = 0;
1315 e0ab43e7 2018-03-16 stsp *outbuf = accum_buf;
1316 e0ab43e7 2018-03-16 stsp *outlen = accum_size;
1318 efd2a263 2018-01-19 stsp return err;
1321 3ee5fc21 2018-01-17 stsp const struct got_error *
1322 24140570 2018-09-09 stsp got_packfile_extract_object(struct got_pack *pack, struct got_object *obj,
1323 3840f4c9 2018-09-12 stsp FILE *outfile, FILE *base_file, FILE *accum_file)
1325 3ee5fc21 2018-01-17 stsp const struct got_error *err = NULL;
1327 3ee5fc21 2018-01-17 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1328 3ee5fc21 2018-01-17 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1330 ef2bccd9 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1331 24140570 2018-09-09 stsp if (obj->pack_offset >= pack->filesize)
1332 24140570 2018-09-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1334 d7464085 2018-07-09 stsp if (pack->map) {
1335 d7464085 2018-07-09 stsp size_t mapoff = (size_t)obj->pack_offset;
1336 4788f1ce 2020-03-18 stsp err = got_inflate_to_file_mmap(&obj->size, NULL, NULL,
1337 4788f1ce 2020-03-18 stsp pack->map, mapoff, pack->filesize - mapoff,
1340 24140570 2018-09-09 stsp if (lseek(pack->fd, obj->pack_offset, SEEK_SET) == -1)
1341 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
1342 4788f1ce 2020-03-18 stsp err = got_inflate_to_file_fd(&obj->size, NULL, NULL,
1343 4788f1ce 2020-03-18 stsp pack->fd, outfile);
1346 4788f1ce 2020-03-18 stsp err = got_pack_dump_delta_chain_to_file(&obj->size,
1347 4788f1ce 2020-03-18 stsp &obj->deltas, pack, outfile, base_file, accum_file);
1349 a1fd68d8 2018-01-12 stsp return err;
1352 e0ab43e7 2018-03-16 stsp const struct got_error *
1353 e0ab43e7 2018-03-16 stsp got_packfile_extract_object_to_mem(uint8_t **buf, size_t *len,
1354 7e212e3d 2018-09-09 stsp struct got_object *obj, struct got_pack *pack)
1356 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1358 e0ab43e7 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1359 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1361 48095039 2018-09-09 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1362 7e212e3d 2018-09-09 stsp if (obj->pack_offset >= pack->filesize)
1363 7e212e3d 2018-09-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1364 d7464085 2018-07-09 stsp if (pack->map) {
1365 d7464085 2018-07-09 stsp size_t mapoff = (size_t)obj->pack_offset;
1366 2e5a6fad 2020-03-18 stsp err = got_inflate_to_mem_mmap(buf, len, NULL, NULL,
1367 2e5a6fad 2020-03-18 stsp pack->map, mapoff, pack->filesize - mapoff);
1369 7e212e3d 2018-09-09 stsp if (lseek(pack->fd, obj->pack_offset, SEEK_SET) == -1)
1370 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
1371 1e87a3c3 2020-03-18 stsp err = got_inflate_to_mem_fd(buf, len, NULL, NULL,
1372 55fdd257 2020-03-18 stsp obj->size, pack->fd);
1375 668a20f6 2020-03-18 stsp err = got_pack_dump_delta_chain_to_mem(buf, len, &obj->deltas,
1378 e0ab43e7 2018-03-16 stsp return err;
