2 5d56da81 2019-01-13 stsp * Copyright (c) 2018, 2019 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 63581804 2018-07-09 stsp #include "got_lib_inflate.h"
43 718b3ab0 2018-03-17 stsp #include "got_lib_object.h"
44 876c234b 2018-09-10 stsp #include "got_lib_privsep.h"
45 15a94983 2018-12-23 stsp #include "got_lib_pack.h"
47 79b11c62 2018-03-09 stsp #ifndef nitems
48 79b11c62 2018-03-09 stsp #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
52 a1fd68d8 2018-01-12 stsp #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
55 0a0a3048 2018-01-10 stsp static const struct got_error *
56 0a0a3048 2018-01-10 stsp verify_fanout_table(uint32_t *fanout_table)
60 0a0a3048 2018-01-10 stsp for (i = 0; i < 0xff - 1; i++) {
61 a1fd68d8 2018-01-12 stsp if (be32toh(fanout_table[i]) > be32toh(fanout_table[i + 1]))
62 0a0a3048 2018-01-10 stsp return got_error(GOT_ERR_BAD_PACKIDX);
65 0a0a3048 2018-01-10 stsp return NULL;
68 1510f469 2018-09-09 stsp const struct got_error *
69 817c5a18 2018-09-09 stsp got_packidx_init_hdr(struct got_packidx *p, int verify)
71 0a0a3048 2018-01-10 stsp const struct got_error *err = NULL;
72 817c5a18 2018-09-09 stsp struct got_packidx_v2_hdr *h;
73 0ebaf008 2018-01-10 stsp SHA1_CTX ctx;
74 0ebaf008 2018-01-10 stsp uint8_t sha1[SHA1_DIGEST_LENGTH];
75 817c5a18 2018-09-09 stsp size_t nobj, len_fanout, len_ids, offset, remain;
78 0ebaf008 2018-01-10 stsp SHA1Init(&ctx);
80 57b35b75 2018-06-22 stsp h = &p->hdr;
82 57b35b75 2018-06-22 stsp remain = p->len;
84 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->magic)) {
85 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
89 fc79a48d 2018-07-09 stsp h->magic = (uint32_t *)(p->map + offset);
91 fc79a48d 2018-07-09 stsp h->magic = malloc(sizeof(*h->magic));
92 fc79a48d 2018-07-09 stsp if (h->magic == NULL) {
93 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
96 fc79a48d 2018-07-09 stsp n = read(p->fd, h->magic, sizeof(*h->magic));
98 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
99 faaa1c0f 2018-09-15 stsp else if (n != sizeof(*h->magic)) {
100 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
104 57b35b75 2018-06-22 stsp if (betoh32(*h->magic) != GOT_PACKIDX_V2_MAGIC) {
105 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
108 57b35b75 2018-06-22 stsp offset += sizeof(*h->magic);
109 57b35b75 2018-06-22 stsp remain -= sizeof(*h->magic);
111 0cb74cf4 2018-07-08 stsp if (verify)
112 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->magic, sizeof(*h->magic));
114 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->version)) {
115 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
118 fc79a48d 2018-07-09 stsp if (p->map)
119 fc79a48d 2018-07-09 stsp h->version = (uint32_t *)(p->map + offset);
121 fc79a48d 2018-07-09 stsp h->version = malloc(sizeof(*h->version));
122 fc79a48d 2018-07-09 stsp if (h->version == NULL) {
123 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
126 fc79a48d 2018-07-09 stsp n = read(p->fd, h->version, sizeof(*h->version));
128 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
129 faaa1c0f 2018-09-15 stsp else if (n != sizeof(*h->version)) {
130 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
134 57b35b75 2018-06-22 stsp if (betoh32(*h->version) != GOT_PACKIDX_VERSION) {
135 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
138 57b35b75 2018-06-22 stsp offset += sizeof(*h->version);
139 57b35b75 2018-06-22 stsp remain -= sizeof(*h->version);
141 0cb74cf4 2018-07-08 stsp if (verify)
142 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->version, sizeof(*h->version));
144 57b35b75 2018-06-22 stsp len_fanout =
145 57b35b75 2018-06-22 stsp sizeof(*h->fanout_table) * GOT_PACKIDX_V2_FANOUT_TABLE_ITEMS;
146 57b35b75 2018-06-22 stsp if (remain < len_fanout) {
147 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
150 fc79a48d 2018-07-09 stsp if (p->map)
151 fc79a48d 2018-07-09 stsp h->fanout_table = (uint32_t *)(p->map + offset);
153 fc79a48d 2018-07-09 stsp h->fanout_table = malloc(len_fanout);
154 fc79a48d 2018-07-09 stsp if (h->fanout_table == NULL) {
155 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
158 fc79a48d 2018-07-09 stsp n = read(p->fd, h->fanout_table, len_fanout);
160 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
161 faaa1c0f 2018-09-15 stsp else if (n != len_fanout) {
162 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
166 c8262310 2018-06-04 stsp err = verify_fanout_table(h->fanout_table);
169 0cb74cf4 2018-07-08 stsp if (verify)
170 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->fanout_table, len_fanout);
171 57b35b75 2018-06-22 stsp offset += len_fanout;
172 57b35b75 2018-06-22 stsp remain -= len_fanout;
174 c8262310 2018-06-04 stsp nobj = betoh32(h->fanout_table[0xff]);
175 57b35b75 2018-06-22 stsp len_ids = nobj * sizeof(*h->sorted_ids);
176 57b35b75 2018-06-22 stsp if (len_ids <= nobj || len_ids > remain) {
177 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
180 fc79a48d 2018-07-09 stsp if (p->map)
181 fc79a48d 2018-07-09 stsp h->sorted_ids =
182 fc79a48d 2018-07-09 stsp (struct got_packidx_object_id *)((uint8_t*)(p->map + offset));
184 fc79a48d 2018-07-09 stsp h->sorted_ids = malloc(len_ids);
185 fc79a48d 2018-07-09 stsp if (h->sorted_ids == NULL) {
186 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
189 fc79a48d 2018-07-09 stsp n = read(p->fd, h->sorted_ids, len_ids);
191 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
192 faaa1c0f 2018-09-15 stsp else if (n != len_ids) {
193 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
197 0cb74cf4 2018-07-08 stsp if (verify)
198 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->sorted_ids, len_ids);
199 57b35b75 2018-06-22 stsp offset += len_ids;
200 57b35b75 2018-06-22 stsp remain -= len_ids;
202 57b35b75 2018-06-22 stsp if (remain < nobj * sizeof(*h->crc32)) {
203 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
206 fc79a48d 2018-07-09 stsp if (p->map)
207 fc79a48d 2018-07-09 stsp h->crc32 = (uint32_t *)((uint8_t*)(p->map + offset));
209 fc79a48d 2018-07-09 stsp h->crc32 = malloc(nobj * sizeof(*h->crc32));
210 fc79a48d 2018-07-09 stsp if (h->crc32 == NULL) {
211 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
214 fc79a48d 2018-07-09 stsp n = read(p->fd, h->crc32, nobj * sizeof(*h->crc32));
216 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
217 faaa1c0f 2018-09-15 stsp else if (n != nobj * sizeof(*h->crc32)) {
218 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
222 0cb74cf4 2018-07-08 stsp if (verify)
223 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->crc32, nobj * sizeof(*h->crc32));
224 57b35b75 2018-06-22 stsp remain -= nobj * sizeof(*h->crc32);
225 57b35b75 2018-06-22 stsp offset += nobj * sizeof(*h->crc32);
227 57b35b75 2018-06-22 stsp if (remain < nobj * sizeof(*h->offsets)) {
228 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
231 fc79a48d 2018-07-09 stsp if (p->map)
232 fc79a48d 2018-07-09 stsp h->offsets = (uint32_t *)((uint8_t*)(p->map + offset));
234 fc79a48d 2018-07-09 stsp h->offsets = malloc(nobj * sizeof(*h->offsets));
235 fc79a48d 2018-07-09 stsp if (h->offsets == NULL) {
236 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
239 fc79a48d 2018-07-09 stsp n = read(p->fd, h->offsets, nobj * sizeof(*h->offsets));
241 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
242 faaa1c0f 2018-09-15 stsp else if (n != nobj * sizeof(*h->offsets)) {
243 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
247 0cb74cf4 2018-07-08 stsp if (verify)
248 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t *)h->offsets,
249 0cb74cf4 2018-07-08 stsp nobj * sizeof(*h->offsets));
250 57b35b75 2018-06-22 stsp remain -= nobj * sizeof(*h->offsets);
251 57b35b75 2018-06-22 stsp offset += nobj * sizeof(*h->offsets);
253 0a0a3048 2018-01-10 stsp /* Large file offsets are contained only in files > 2GB. */
254 57b35b75 2018-06-22 stsp if (p->len <= 0x80000000)
255 0a0a3048 2018-01-10 stsp goto checksum;
257 57b35b75 2018-06-22 stsp if (remain < nobj * sizeof(*h->large_offsets)) {
258 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
261 fc79a48d 2018-07-09 stsp if (p->map)
262 fc79a48d 2018-07-09 stsp h->large_offsets = (uint64_t *)((uint8_t*)(p->map + offset));
264 fc79a48d 2018-07-09 stsp h->offsets = malloc(nobj * sizeof(*h->large_offsets));
265 fc79a48d 2018-07-09 stsp if (h->offsets == NULL) {
266 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
269 fc79a48d 2018-07-09 stsp n = read(p->fd, h->large_offsets,
270 fc79a48d 2018-07-09 stsp nobj * sizeof(*h->large_offsets));
272 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
273 faaa1c0f 2018-09-15 stsp else if (n != nobj * sizeof(*h->large_offsets)) {
274 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
278 0cb74cf4 2018-07-08 stsp if (verify)
279 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, (uint8_t*)h->large_offsets,
280 0cb74cf4 2018-07-08 stsp nobj * sizeof(*h->large_offsets));
281 57b35b75 2018-06-22 stsp remain -= nobj * sizeof(*h->large_offsets);
282 57b35b75 2018-06-22 stsp offset += nobj * sizeof(*h->large_offsets);
285 57b35b75 2018-06-22 stsp if (remain < sizeof(*h->trailer)) {
286 57b35b75 2018-06-22 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
289 fc79a48d 2018-07-09 stsp if (p->map)
290 fc79a48d 2018-07-09 stsp h->trailer =
291 fc79a48d 2018-07-09 stsp (struct got_packidx_trailer *)((uint8_t*)(p->map + offset));
293 fc79a48d 2018-07-09 stsp h->trailer = malloc(sizeof(*h->trailer));
294 fc79a48d 2018-07-09 stsp if (h->trailer == NULL) {
295 638f9024 2019-05-13 stsp err = got_error_from_errno("malloc");
298 fc79a48d 2018-07-09 stsp n = read(p->fd, h->trailer, sizeof(*h->trailer));
300 638f9024 2019-05-13 stsp err = got_error_from_errno("read");
301 faaa1c0f 2018-09-15 stsp else if (n != sizeof(*h->trailer)) {
302 fc79a48d 2018-07-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
306 0cb74cf4 2018-07-08 stsp if (verify) {
307 0cb74cf4 2018-07-08 stsp SHA1Update(&ctx, h->trailer->packfile_sha1, SHA1_DIGEST_LENGTH);
308 0cb74cf4 2018-07-08 stsp SHA1Final(sha1, &ctx);
309 0cb74cf4 2018-07-08 stsp if (memcmp(h->trailer->packidx_sha1, sha1,
310 0cb74cf4 2018-07-08 stsp SHA1_DIGEST_LENGTH) != 0)
311 0cb74cf4 2018-07-08 stsp err = got_error(GOT_ERR_PACKIDX_CSUM);
314 817c5a18 2018-09-09 stsp return err;
317 817c5a18 2018-09-09 stsp const struct got_error *
318 817c5a18 2018-09-09 stsp got_packidx_open(struct got_packidx **packidx, const char *path, int verify)
320 817c5a18 2018-09-09 stsp const struct got_error *err = NULL;
321 817c5a18 2018-09-09 stsp struct got_packidx *p;
322 57377f07 2019-05-23 stsp struct stat sb;
324 817c5a18 2018-09-09 stsp *packidx = NULL;
326 817c5a18 2018-09-09 stsp p = calloc(1, sizeof(*p));
327 817c5a18 2018-09-09 stsp if (p == NULL)
328 638f9024 2019-05-13 stsp return got_error_from_errno("calloc");
330 a5b57ccf 2019-04-11 stsp p->fd = open(path, O_RDONLY | O_NOFOLLOW);
331 817c5a18 2018-09-09 stsp if (p->fd == -1)
332 638f9024 2019-05-13 stsp return got_error_from_errno2("open", path);
334 57377f07 2019-05-23 stsp if (fstat(p->fd, &sb) != 0) {
335 57377f07 2019-05-23 stsp err = got_error_from_errno2("fstat", path);
336 817c5a18 2018-09-09 stsp close(p->fd);
338 817c5a18 2018-09-09 stsp return err;
340 57377f07 2019-05-23 stsp p->len = sb.st_size;
341 817c5a18 2018-09-09 stsp if (p->len < sizeof(p->hdr)) {
342 817c5a18 2018-09-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
343 817c5a18 2018-09-09 stsp close(p->fd);
345 817c5a18 2018-09-09 stsp return err;
348 817c5a18 2018-09-09 stsp p->path_packidx = strdup(path);
349 817c5a18 2018-09-09 stsp if (p->path_packidx == NULL) {
350 638f9024 2019-05-13 stsp err = got_error_from_errno("strdup");
354 817c5a18 2018-09-09 stsp #ifndef GOT_PACK_NO_MMAP
355 817c5a18 2018-09-09 stsp p->map = mmap(NULL, p->len, PROT_READ, MAP_PRIVATE, p->fd, 0);
356 3a11398b 2019-02-21 stsp if (p->map == MAP_FAILED) {
357 3a11398b 2019-02-21 stsp if (errno != ENOMEM) {
358 638f9024 2019-05-13 stsp err = got_error_from_errno("mmap");
361 817c5a18 2018-09-09 stsp p->map = NULL; /* fall back to read(2) */
365 817c5a18 2018-09-09 stsp err = got_packidx_init_hdr(p, verify);
368 0a0a3048 2018-01-10 stsp got_packidx_close(p);
370 0a0a3048 2018-01-10 stsp *packidx = p;
372 0a0a3048 2018-01-10 stsp return err;
375 57b35b75 2018-06-22 stsp const struct got_error *
376 6fd11751 2018-06-04 stsp got_packidx_close(struct got_packidx *packidx)
378 57b35b75 2018-06-22 stsp const struct got_error *err = NULL;
380 6fd11751 2018-06-04 stsp free(packidx->path_packidx);
381 fc79a48d 2018-07-09 stsp if (packidx->map) {
382 57b35b75 2018-06-22 stsp if (munmap(packidx->map, packidx->len) == -1)
383 638f9024 2019-05-13 stsp err = got_error_from_errno("munmap");
385 fc79a48d 2018-07-09 stsp free(packidx->hdr.magic);
386 fc79a48d 2018-07-09 stsp free(packidx->hdr.version);
387 fc79a48d 2018-07-09 stsp free(packidx->hdr.fanout_table);
388 fc79a48d 2018-07-09 stsp free(packidx->hdr.sorted_ids);
389 fc79a48d 2018-07-09 stsp free(packidx->hdr.crc32);
390 fc79a48d 2018-07-09 stsp free(packidx->hdr.offsets);
391 fc79a48d 2018-07-09 stsp free(packidx->hdr.large_offsets);
392 fc79a48d 2018-07-09 stsp free(packidx->hdr.trailer);
394 3a6ce05a 2019-02-11 stsp if (close(packidx->fd) != 0 && err == NULL)
395 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
396 0a0a3048 2018-01-10 stsp free(packidx);
398 57b35b75 2018-06-22 stsp return err;
401 a1fd68d8 2018-01-12 stsp static off_t
402 6fd11751 2018-06-04 stsp get_object_offset(struct got_packidx *packidx, int idx)
404 6fd11751 2018-06-04 stsp uint32_t totobj = betoh32(packidx->hdr.fanout_table[0xff]);
405 6fd11751 2018-06-04 stsp uint32_t offset = betoh32(packidx->hdr.offsets[idx]);
406 a1fd68d8 2018-01-12 stsp if (offset & GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX) {
407 a1fd68d8 2018-01-12 stsp uint64_t loffset;
408 a1fd68d8 2018-01-12 stsp idx = offset & GOT_PACKIDX_OFFSET_VAL_MASK;
409 6fd11751 2018-06-04 stsp if (idx < 0 || idx > totobj ||
410 6fd11751 2018-06-04 stsp packidx->hdr.large_offsets == NULL)
412 6fd11751 2018-06-04 stsp loffset = betoh64(packidx->hdr.large_offsets[idx]);
413 a1fd68d8 2018-01-12 stsp return (loffset > INT64_MAX ? -1 : (off_t)loffset);
415 a1fd68d8 2018-01-12 stsp return (off_t)(offset & GOT_PACKIDX_OFFSET_VAL_MASK);
419 1510f469 2018-09-09 stsp got_packidx_get_object_idx(struct got_packidx *packidx, struct got_object_id *id)
421 a1fd68d8 2018-01-12 stsp u_int8_t id0 = id->sha1[0];
422 6fd11751 2018-06-04 stsp uint32_t totobj = betoh32(packidx->hdr.fanout_table[0xff]);
423 40aeb19c 2018-06-22 stsp int left = 0, right = totobj - 1;
425 a1fd68d8 2018-01-12 stsp if (id0 > 0)
426 40aeb19c 2018-06-22 stsp left = betoh32(packidx->hdr.fanout_table[id0 - 1]);
428 40aeb19c 2018-06-22 stsp while (left <= right) {
429 57b35b75 2018-06-22 stsp struct got_packidx_object_id *oid;
430 40aeb19c 2018-06-22 stsp int i, cmp;
432 40aeb19c 2018-06-22 stsp i = ((left + right) / 2);
433 40aeb19c 2018-06-22 stsp oid = &packidx->hdr.sorted_ids[i];
434 57b35b75 2018-06-22 stsp cmp = memcmp(id->sha1, oid->sha1, SHA1_DIGEST_LENGTH);
435 16dcbf91 2018-04-01 stsp if (cmp == 0)
437 40aeb19c 2018-06-22 stsp else if (cmp > 0)
438 40aeb19c 2018-06-22 stsp left = i + 1;
439 40aeb19c 2018-06-22 stsp else if (cmp < 0)
440 40aeb19c 2018-06-22 stsp right = i - 1;
446 876c234b 2018-09-10 stsp const struct got_error *
447 876c234b 2018-09-10 stsp got_pack_stop_privsep_child(struct got_pack *pack)
449 96732e0b 2018-11-11 stsp const struct got_error *err = NULL;
451 876c234b 2018-09-10 stsp if (pack->privsep_child == NULL)
452 876c234b 2018-09-10 stsp return NULL;
454 876c234b 2018-09-10 stsp err = got_privsep_send_stop(pack->privsep_child->imsg_fd);
456 96732e0b 2018-11-11 stsp return err;
457 96732e0b 2018-11-11 stsp err = got_privsep_wait_for_child(pack->privsep_child->pid);
458 0dd5271b 2019-05-10 stsp if (close(pack->privsep_child->imsg_fd) != 0 && err == NULL)
459 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
460 876c234b 2018-09-10 stsp free(pack->privsep_child);
461 876c234b 2018-09-10 stsp pack->privsep_child = NULL;
462 876c234b 2018-09-10 stsp return err;
465 d7464085 2018-07-09 stsp const struct got_error *
466 7e656b93 2018-03-17 stsp got_pack_close(struct got_pack *pack)
468 d7464085 2018-07-09 stsp const struct got_error *err = NULL;
470 876c234b 2018-09-10 stsp err = got_pack_stop_privsep_child(pack);
471 876c234b 2018-09-10 stsp if (pack->map && munmap(pack->map, pack->filesize) == -1 && !err)
472 638f9024 2019-05-13 stsp err = got_error_from_errno("munmap");
473 3a6ce05a 2019-02-11 stsp if (pack->fd != -1 && close(pack->fd) != 0 && err == NULL)
474 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
475 8b2180d4 2018-04-26 stsp pack->fd = -1;
476 4589e373 2018-03-17 stsp free(pack->path_packfile);
477 4589e373 2018-03-17 stsp pack->path_packfile = NULL;
478 4589e373 2018-03-17 stsp pack->filesize = 0;
480 c7fe698a 2018-01-23 stsp return err;
483 c7fe698a 2018-01-23 stsp static const struct got_error *
484 d7464085 2018-07-09 stsp parse_object_type_and_size(uint8_t *type, uint64_t *size, size_t *len,
485 d7464085 2018-07-09 stsp struct got_pack *pack, off_t offset)
487 a487c1d0 2018-01-14 stsp uint8_t t = 0;
488 a487c1d0 2018-01-14 stsp uint64_t s = 0;
489 a487c1d0 2018-01-14 stsp uint8_t sizeN;
490 d7464085 2018-07-09 stsp size_t mapoff = 0;
495 d7464085 2018-07-09 stsp if (offset >= pack->filesize)
496 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
498 d7464085 2018-07-09 stsp if (pack->map) {
499 d7464085 2018-07-09 stsp mapoff = (size_t)offset;
501 d7464085 2018-07-09 stsp if (lseek(pack->fd, offset, SEEK_SET) == -1)
502 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
506 a1fd68d8 2018-01-12 stsp /* We do not support size values which don't fit in 64 bit. */
508 a487c1d0 2018-01-14 stsp return got_error(GOT_ERR_NO_SPACE);
510 d7464085 2018-07-09 stsp if (pack->map) {
511 d7464085 2018-07-09 stsp sizeN = *(pack->map + mapoff);
512 d7464085 2018-07-09 stsp mapoff += sizeof(sizeN);
514 d7464085 2018-07-09 stsp ssize_t n = read(pack->fd, &sizeN, sizeof(sizeN));
516 638f9024 2019-05-13 stsp return got_error_from_errno("read");
517 d7464085 2018-07-09 stsp if (n != sizeof(sizeN))
518 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
520 d7464085 2018-07-09 stsp *len += sizeof(sizeN);
522 a1fd68d8 2018-01-12 stsp if (i == 0) {
523 a487c1d0 2018-01-14 stsp t = (sizeN & GOT_PACK_OBJ_SIZE0_TYPE_MASK) >>
524 a1fd68d8 2018-01-12 stsp GOT_PACK_OBJ_SIZE0_TYPE_MASK_SHIFT;
525 a487c1d0 2018-01-14 stsp s = (sizeN & GOT_PACK_OBJ_SIZE0_VAL_MASK);
527 a1fd68d8 2018-01-12 stsp size_t shift = 4 + 7 * (i - 1);
528 a487c1d0 2018-01-14 stsp s |= ((sizeN & GOT_PACK_OBJ_SIZE_VAL_MASK) << shift);
531 a1fd68d8 2018-01-12 stsp } while (sizeN & GOT_PACK_OBJ_SIZE_MORE);
535 a487c1d0 2018-01-14 stsp return NULL;
538 a1fd68d8 2018-01-12 stsp static const struct got_error *
539 9710aac2 2018-01-19 stsp open_plain_object(struct got_object **obj, const char *path_packfile,
540 c59b3346 2018-09-11 stsp struct got_object_id *id, uint8_t type, off_t offset, size_t size, int idx)
542 6ccb713b 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
543 6ccb713b 2018-01-19 stsp if (*obj == NULL)
544 638f9024 2019-05-13 stsp return got_error_from_errno("calloc");
546 6ccb713b 2018-01-19 stsp (*obj)->path_packfile = strdup(path_packfile);
547 6ccb713b 2018-01-19 stsp if ((*obj)->path_packfile == NULL) {
548 638f9024 2019-05-13 stsp const struct got_error *err = got_error_from_errno("strdup");
549 6ccb713b 2018-01-19 stsp free(*obj);
550 6ccb713b 2018-01-19 stsp *obj = NULL;
551 0a585a0d 2018-03-17 stsp return err;
554 6ccb713b 2018-01-19 stsp (*obj)->type = type;
555 6ccb713b 2018-01-19 stsp (*obj)->flags = GOT_OBJ_FLAG_PACKED;
556 c59b3346 2018-09-11 stsp (*obj)->pack_idx = idx;
557 6ccb713b 2018-01-19 stsp (*obj)->hdrlen = 0;
558 6ccb713b 2018-01-19 stsp (*obj)->size = size;
559 106807b4 2018-09-15 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
560 6ccb713b 2018-01-19 stsp (*obj)->pack_offset = offset;
562 b107e67f 2018-01-19 stsp return NULL;
565 b107e67f 2018-01-19 stsp static const struct got_error *
566 d7464085 2018-07-09 stsp parse_negative_offset(int64_t *offset, size_t *len, struct got_pack *pack,
567 d7464085 2018-07-09 stsp off_t delta_offset)
569 b107e67f 2018-01-19 stsp int64_t o = 0;
570 b107e67f 2018-01-19 stsp uint8_t offN;
576 b107e67f 2018-01-19 stsp /* We do not support offset values which don't fit in 64 bit. */
578 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_NO_SPACE);
580 d7464085 2018-07-09 stsp if (pack->map) {
581 d7464085 2018-07-09 stsp size_t mapoff;
582 d7464085 2018-07-09 stsp if (delta_offset >= pack->filesize)
583 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
584 d7464085 2018-07-09 stsp mapoff = (size_t)delta_offset + *len;
585 d7464085 2018-07-09 stsp offN = *(pack->map + mapoff);
588 d7464085 2018-07-09 stsp n = read(pack->fd, &offN, sizeof(offN));
590 638f9024 2019-05-13 stsp return got_error_from_errno("read");
591 d7464085 2018-07-09 stsp if (n != sizeof(offN))
592 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
594 d7464085 2018-07-09 stsp *len += sizeof(offN);
596 b107e67f 2018-01-19 stsp if (i == 0)
597 b107e67f 2018-01-19 stsp o = (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
601 cecc778e 2018-01-23 stsp o += (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
604 b107e67f 2018-01-19 stsp } while (offN & GOT_PACK_OBJ_DELTA_OFF_MORE);
606 b107e67f 2018-01-19 stsp *offset = o;
607 6ccb713b 2018-01-19 stsp return NULL;
610 6ccb713b 2018-01-19 stsp static const struct got_error *
611 d7464085 2018-07-09 stsp parse_offset_delta(off_t *base_offset, size_t *len, struct got_pack *pack,
612 d7464085 2018-07-09 stsp off_t offset, int tslen)
614 96f5e8b3 2018-01-23 stsp const struct got_error *err;
615 b107e67f 2018-01-19 stsp int64_t negoffset;
616 b107e67f 2018-01-19 stsp size_t negofflen;
620 d7464085 2018-07-09 stsp err = parse_negative_offset(&negoffset, &negofflen, pack,
621 d7464085 2018-07-09 stsp offset + tslen);
623 b107e67f 2018-01-19 stsp return err;
625 b107e67f 2018-01-19 stsp /* Compute the base object's offset (must be in the same pack file). */
626 96f5e8b3 2018-01-23 stsp *base_offset = (offset - negoffset);
627 96f5e8b3 2018-01-23 stsp if (*base_offset <= 0)
628 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_BAD_PACKFILE);
630 d7464085 2018-07-09 stsp *len = negofflen;
631 96f5e8b3 2018-01-23 stsp return NULL;
634 0e22967e 2018-02-11 stsp static const struct got_error *
635 c8ecd499 2018-09-09 stsp resolve_delta_chain(struct got_delta_chain *, struct got_packidx *,
636 c8ecd499 2018-09-09 stsp struct got_pack *, off_t, size_t, int, size_t, unsigned int);
638 96f5e8b3 2018-01-23 stsp static const struct got_error *
639 c336f889 2018-07-23 stsp add_delta(struct got_delta_chain *deltas, off_t delta_offset, size_t tslen,
640 c336f889 2018-07-23 stsp int delta_type, size_t delta_size, size_t delta_data_offset,
641 c336f889 2018-07-23 stsp uint8_t *delta_buf, size_t delta_len)
643 bdd2fbb3 2018-02-11 stsp struct got_delta *delta;
645 c336f889 2018-07-23 stsp delta = got_delta_open(delta_offset, tslen, delta_type, delta_size,
646 c336f889 2018-07-23 stsp delta_data_offset, delta_buf,
647 a53d2f13 2018-03-17 stsp delta_len);
648 bdd2fbb3 2018-02-11 stsp if (delta == NULL)
649 638f9024 2019-05-13 stsp return got_error_from_errno("got_delta_open");
650 bdd2fbb3 2018-02-11 stsp /* delta is freed in got_object_close() */
651 bdd2fbb3 2018-02-11 stsp deltas->nentries++;
652 bdd2fbb3 2018-02-11 stsp SIMPLEQ_INSERT_HEAD(&deltas->entries, delta, entry);
653 bdd2fbb3 2018-02-11 stsp return NULL;
656 bdd2fbb3 2018-02-11 stsp static const struct got_error *
657 6b9c9673 2018-01-23 stsp resolve_offset_delta(struct got_delta_chain *deltas,
658 c8ecd499 2018-09-09 stsp struct got_packidx *packidx, struct got_pack *pack, off_t delta_offset,
659 c8ecd499 2018-09-09 stsp size_t tslen, int delta_type, size_t delta_size, unsigned int recursion)
662 a3500804 2018-01-23 stsp const struct got_error *err;
663 c3703302 2018-01-23 stsp off_t base_offset;
664 c3703302 2018-01-23 stsp uint8_t base_type;
665 c3703302 2018-01-23 stsp uint64_t base_size;
666 c3703302 2018-01-23 stsp size_t base_tslen;
667 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
668 a53d2f13 2018-03-17 stsp uint8_t *delta_buf;
669 d7464085 2018-07-09 stsp size_t delta_len, consumed;
671 d7464085 2018-07-09 stsp err = parse_offset_delta(&base_offset, &consumed, pack,
672 d7464085 2018-07-09 stsp delta_offset, tslen);
674 a3500804 2018-01-23 stsp return err;
676 d7464085 2018-07-09 stsp delta_data_offset = delta_offset + tslen + consumed;
677 d7464085 2018-07-09 stsp if (delta_data_offset >= pack->filesize)
678 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
680 d7464085 2018-07-09 stsp if (pack->map == NULL) {
681 d7464085 2018-07-09 stsp delta_data_offset = lseek(pack->fd, 0, SEEK_CUR);
682 d7464085 2018-07-09 stsp if (delta_data_offset == -1)
683 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
686 d7464085 2018-07-09 stsp if (pack->map) {
687 d7464085 2018-07-09 stsp size_t mapoff = (size_t)delta_data_offset;
688 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&delta_buf, &delta_len, pack->map,
689 d7464085 2018-07-09 stsp mapoff, pack->filesize - mapoff);
691 d7464085 2018-07-09 stsp return err;
694 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&delta_buf, &delta_len, pack->fd);
696 d7464085 2018-07-09 stsp return err;
699 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type, delta_size,
700 c336f889 2018-07-23 stsp delta_data_offset, delta_buf, delta_len);
702 1a35c1bc 2019-05-22 stsp return err;
704 c3703302 2018-01-23 stsp /* An offset delta must be in the same packfile. */
705 1a35c1bc 2019-05-22 stsp if (base_offset >= pack->filesize)
706 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_PACK_OFFSET);
708 348f621c 2018-01-23 stsp err = parse_object_type_and_size(&base_type, &base_size, &base_tslen,
709 d7464085 2018-07-09 stsp pack, base_offset);
711 1a35c1bc 2019-05-22 stsp return err;
713 1a35c1bc 2019-05-22 stsp return resolve_delta_chain(deltas, packidx, pack, base_offset,
714 b0e2201a 2018-06-22 stsp base_tslen, base_type, base_size, recursion - 1);
717 c3703302 2018-01-23 stsp static const struct got_error *
718 c8ecd499 2018-09-09 stsp resolve_ref_delta(struct got_delta_chain *deltas, struct got_packidx *packidx,
719 c8ecd499 2018-09-09 stsp struct got_pack *pack, off_t delta_offset, size_t tslen, int delta_type,
720 c8ecd499 2018-09-09 stsp size_t delta_size, unsigned int recursion)
722 6b9c9673 2018-01-23 stsp const struct got_error *err;
723 6b9c9673 2018-01-23 stsp struct got_object_id id;
725 6b9c9673 2018-01-23 stsp off_t base_offset;
726 6b9c9673 2018-01-23 stsp uint8_t base_type;
727 6b9c9673 2018-01-23 stsp uint64_t base_size;
728 6b9c9673 2018-01-23 stsp size_t base_tslen;
729 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
730 1a35c1bc 2019-05-22 stsp uint8_t *delta_buf;
731 a53d2f13 2018-03-17 stsp size_t delta_len;
733 d7464085 2018-07-09 stsp if (delta_offset >= pack->filesize)
734 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
735 45202a8f 2018-07-11 stsp delta_data_offset = delta_offset + tslen;
736 d7464085 2018-07-09 stsp if (delta_data_offset >= pack->filesize)
737 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
739 d7464085 2018-07-09 stsp if (pack->map == NULL) {
740 d7464085 2018-07-09 stsp delta_data_offset = lseek(pack->fd, 0, SEEK_CUR);
741 d7464085 2018-07-09 stsp if (delta_data_offset == -1)
742 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
745 d7464085 2018-07-09 stsp if (pack->map) {
746 45202a8f 2018-07-11 stsp size_t mapoff = (size_t)delta_data_offset;
747 d7464085 2018-07-09 stsp memcpy(&id, pack->map + mapoff, sizeof(id));
748 d7464085 2018-07-09 stsp mapoff += sizeof(id);
749 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&delta_buf, &delta_len, pack->map,
750 45202a8f 2018-07-11 stsp mapoff, pack->filesize - mapoff);
752 1a35c1bc 2019-05-22 stsp return err;
754 d7464085 2018-07-09 stsp ssize_t n = read(pack->fd, &id, sizeof(id));
756 638f9024 2019-05-13 stsp return got_error_from_errno("read");
757 d7464085 2018-07-09 stsp if (n != sizeof(id))
758 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
759 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&delta_buf, &delta_len, pack->fd);
761 1a35c1bc 2019-05-22 stsp return err;
764 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type, delta_size,
765 c336f889 2018-07-23 stsp delta_data_offset, delta_buf, delta_len);
767 1a35c1bc 2019-05-22 stsp return err;
769 652b2703 2018-06-22 stsp /* Delta base must be in the same pack file. */
770 1510f469 2018-09-09 stsp idx = got_packidx_get_object_idx(packidx, &id);
771 1a35c1bc 2019-05-22 stsp if (idx == -1)
772 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_BAD_PACKFILE);
774 6b9c9673 2018-01-23 stsp base_offset = get_object_offset(packidx, idx);
775 1a35c1bc 2019-05-22 stsp if (base_offset == (uint64_t)-1)
776 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_BAD_PACKIDX);
778 1a35c1bc 2019-05-22 stsp if (base_offset >= pack->filesize)
779 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_PACK_OFFSET);
781 6b9c9673 2018-01-23 stsp err = parse_object_type_and_size(&base_type, &base_size, &base_tslen,
782 d7464085 2018-07-09 stsp pack, base_offset);
784 1a35c1bc 2019-05-22 stsp return err;
786 1a35c1bc 2019-05-22 stsp return resolve_delta_chain(deltas, packidx, pack, base_offset,
787 0c048b15 2018-04-27 stsp base_tslen, base_type, base_size, recursion - 1);
790 6b9c9673 2018-01-23 stsp static const struct got_error *
791 c8ecd499 2018-09-09 stsp resolve_delta_chain(struct got_delta_chain *deltas, struct got_packidx *packidx,
792 c8ecd499 2018-09-09 stsp struct got_pack *pack, off_t delta_offset, size_t tslen, int delta_type,
793 c8ecd499 2018-09-09 stsp size_t delta_size, unsigned int recursion)
795 c3703302 2018-01-23 stsp const struct got_error *err = NULL;
797 5b7e13a7 2018-04-02 stsp if (--recursion == 0)
798 5b7e13a7 2018-04-02 stsp return got_error(GOT_ERR_RECURSION);
800 c3703302 2018-01-23 stsp switch (delta_type) {
801 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_COMMIT:
802 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TREE:
803 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_BLOB:
804 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TAG:
805 c3703302 2018-01-23 stsp /* Plain types are the final delta base. Recursion ends. */
806 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type,
807 c336f889 2018-07-23 stsp delta_size, 0, NULL, 0);
809 a3500804 2018-01-23 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
810 c8ecd499 2018-09-09 stsp err = resolve_offset_delta(deltas, packidx, pack,
811 b0e2201a 2018-06-22 stsp delta_offset, tslen, delta_type, delta_size, recursion - 1);
813 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_REF_DELTA:
814 c8ecd499 2018-09-09 stsp err = resolve_ref_delta(deltas, packidx, pack,
815 b0e2201a 2018-06-22 stsp delta_offset, tslen, delta_type, delta_size, recursion - 1);
818 4810de4a 2018-04-01 stsp return got_error(GOT_ERR_OBJ_TYPE);
821 96f5e8b3 2018-01-23 stsp return err;
824 96f5e8b3 2018-01-23 stsp static const struct got_error *
825 a98c62b1 2018-09-09 stsp open_delta_object(struct got_object **obj, struct got_packidx *packidx,
826 a98c62b1 2018-09-09 stsp struct got_pack *pack, struct got_object_id *id, off_t offset,
827 c59b3346 2018-09-11 stsp size_t tslen, int delta_type, size_t delta_size, int idx)
829 96f5e8b3 2018-01-23 stsp const struct got_error *err = NULL;
830 96f5e8b3 2018-01-23 stsp int resolved_type;
832 b107e67f 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
833 b107e67f 2018-01-19 stsp if (*obj == NULL)
834 638f9024 2019-05-13 stsp return got_error_from_errno("calloc");
836 96f5e8b3 2018-01-23 stsp (*obj)->flags = 0;
837 b107e67f 2018-01-19 stsp (*obj)->hdrlen = 0;
838 39e73dc9 2018-03-03 stsp (*obj)->size = 0; /* Not known because deltas aren't applied yet. */
839 106807b4 2018-09-15 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
840 cecc778e 2018-01-23 stsp (*obj)->pack_offset = offset + tslen;
842 1a35c1bc 2019-05-22 stsp SIMPLEQ_INIT(&(*obj)->deltas.entries);
843 1a35c1bc 2019-05-22 stsp (*obj)->flags |= GOT_OBJ_FLAG_DELTIFIED;
845 b0e2201a 2018-06-22 stsp (*obj)->path_packfile = strdup(pack->path_packfile);
846 96f5e8b3 2018-01-23 stsp if ((*obj)->path_packfile == NULL) {
847 638f9024 2019-05-13 stsp err = got_error_from_errno("strdup");
850 96f5e8b3 2018-01-23 stsp (*obj)->flags |= GOT_OBJ_FLAG_PACKED;
851 c59b3346 2018-09-11 stsp (*obj)->pack_idx = idx;
853 c8ecd499 2018-09-09 stsp err = resolve_delta_chain(&(*obj)->deltas, packidx, pack, offset,
854 b0e2201a 2018-06-22 stsp tslen, delta_type, delta_size, GOT_DELTA_CHAIN_RECURSION_MAX);
858 96f5e8b3 2018-01-23 stsp err = got_delta_chain_get_base_type(&resolved_type, &(*obj)->deltas);
861 96f5e8b3 2018-01-23 stsp (*obj)->type = resolved_type;
864 96f5e8b3 2018-01-23 stsp got_object_close(*obj);
865 96f5e8b3 2018-01-23 stsp *obj = NULL;
867 96f5e8b3 2018-01-23 stsp return err;
870 2090a03d 2018-09-09 stsp const struct got_error *
871 2090a03d 2018-09-09 stsp got_packfile_open_object(struct got_object **obj, struct got_pack *pack,
872 6fd11751 2018-06-04 stsp struct got_packidx *packidx, int idx, struct got_object_id *id)
874 a1fd68d8 2018-01-12 stsp const struct got_error *err = NULL;
875 a1fd68d8 2018-01-12 stsp off_t offset;
876 6c00b545 2018-01-17 stsp uint8_t type;
877 6c00b545 2018-01-17 stsp uint64_t size;
878 3ee5fc21 2018-01-17 stsp size_t tslen;
880 6c00b545 2018-01-17 stsp *obj = NULL;
882 a1fd68d8 2018-01-12 stsp offset = get_object_offset(packidx, idx);
883 a1fd68d8 2018-01-12 stsp if (offset == (uint64_t)-1)
884 a1fd68d8 2018-01-12 stsp return got_error(GOT_ERR_BAD_PACKIDX);
886 d7464085 2018-07-09 stsp err = parse_object_type_and_size(&type, &size, &tslen, pack, offset);
888 35c73765 2018-09-09 stsp return err;
890 6c00b545 2018-01-17 stsp switch (type) {
891 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_COMMIT:
892 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_TREE:
893 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_BLOB:
894 d33fc9ef 2018-01-23 stsp case GOT_OBJ_TYPE_TAG:
895 35c73765 2018-09-09 stsp err = open_plain_object(obj, pack->path_packfile, id, type,
896 c59b3346 2018-09-11 stsp offset + tslen, size, idx);
898 b107e67f 2018-01-19 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
899 a48db7e5 2018-01-23 stsp case GOT_OBJ_TYPE_REF_DELTA:
900 a98c62b1 2018-09-09 stsp err = open_delta_object(obj, packidx, pack, id, offset,
901 c59b3346 2018-09-11 stsp tslen, type, size, idx);
904 4810de4a 2018-04-01 stsp err = got_error(GOT_ERR_OBJ_TYPE);
908 3ee5fc21 2018-01-17 stsp return err;
911 efd2a263 2018-01-19 stsp static const struct got_error *
912 40426839 2018-03-17 stsp get_delta_chain_max_size(uint64_t *max_size, struct got_delta_chain *deltas)
914 22484865 2018-03-13 stsp struct got_delta *delta;
915 22484865 2018-03-13 stsp uint64_t base_size = 0, result_size = 0;
917 22484865 2018-03-13 stsp *max_size = 0;
918 22484865 2018-03-13 stsp SIMPLEQ_FOREACH(delta, &deltas->entries, entry) {
919 22484865 2018-03-13 stsp /* Plain object types are the delta base. */
920 22484865 2018-03-13 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
921 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TREE &&
922 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
923 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TAG) {
924 22484865 2018-03-13 stsp const struct got_error *err;
925 a53d2f13 2018-03-17 stsp err = got_delta_get_sizes(&base_size, &result_size,
926 a53d2f13 2018-03-17 stsp delta->delta_buf, delta->delta_len);
928 22484865 2018-03-13 stsp return err;
930 22484865 2018-03-13 stsp base_size = delta->size;
931 22484865 2018-03-13 stsp if (base_size > *max_size)
932 22484865 2018-03-13 stsp *max_size = base_size;
933 22484865 2018-03-13 stsp if (result_size > *max_size)
934 22484865 2018-03-13 stsp *max_size = result_size;
937 9feb4ff2 2018-03-14 stsp return NULL;
940 ac544f8c 2019-01-13 stsp const struct got_error *
941 85a703fa 2019-01-13 stsp got_pack_get_max_delta_object_size(uint64_t *size, struct got_object *obj)
943 85a703fa 2019-01-13 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0)
944 85a703fa 2019-01-13 stsp return got_error(GOT_ERR_OBJ_TYPE);
946 ac544f8c 2019-01-13 stsp return get_delta_chain_max_size(size, &obj->deltas);
949 22484865 2018-03-13 stsp static const struct got_error *
950 b29656e2 2018-03-16 stsp dump_delta_chain_to_file(size_t *result_size, struct got_delta_chain *deltas,
951 3840f4c9 2018-09-12 stsp struct got_pack *pack, FILE *outfile, FILE *base_file, FILE *accum_file)
953 efd2a263 2018-01-19 stsp const struct got_error *err = NULL;
954 6691714a 2018-01-23 stsp struct got_delta *delta;
955 8628c62d 2018-03-15 stsp uint8_t *base_buf = NULL, *accum_buf = NULL;
956 34fca9c3 2018-11-11 stsp size_t base_bufsz = 0, accum_size = 0;
957 22484865 2018-03-13 stsp uint64_t max_size;
960 b29656e2 2018-03-16 stsp *result_size = 0;
962 710bb5ca 2018-01-23 stsp if (SIMPLEQ_EMPTY(&deltas->entries))
963 6691714a 2018-01-23 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
965 8628c62d 2018-03-15 stsp /* We process small enough files entirely in memory for speed. */
966 40426839 2018-03-17 stsp err = get_delta_chain_max_size(&max_size, deltas);
968 22484865 2018-03-13 stsp return err;
969 8628c62d 2018-03-15 stsp if (max_size < GOT_DELTA_RESULT_SIZE_CACHED_MAX) {
970 8628c62d 2018-03-15 stsp accum_buf = malloc(max_size);
971 8628c62d 2018-03-15 stsp if (accum_buf == NULL)
972 638f9024 2019-05-13 stsp return got_error_from_errno("malloc");
973 3840f4c9 2018-09-12 stsp base_file = NULL;
974 3840f4c9 2018-09-12 stsp accum_file = NULL;
977 6691714a 2018-01-23 stsp /* Deltas are ordered in ascending order. */
978 710bb5ca 2018-01-23 stsp SIMPLEQ_FOREACH(delta, &deltas->entries, entry) {
979 a6b158cc 2018-02-11 stsp if (n == 0) {
980 34fca9c3 2018-11-11 stsp size_t mapoff;
981 0c048b15 2018-04-27 stsp off_t delta_data_offset;
983 a6b158cc 2018-02-11 stsp /* Plain object types are the delta base. */
984 a6b158cc 2018-02-11 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
985 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TREE &&
986 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
987 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TAG) {
988 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
992 0c048b15 2018-04-27 stsp delta_data_offset = delta->offset + delta->tslen;
993 0c048b15 2018-04-27 stsp if (delta_data_offset >= pack->filesize) {
994 0c048b15 2018-04-27 stsp err = got_error(GOT_ERR_PACK_OFFSET);
997 d7464085 2018-07-09 stsp if (pack->map == NULL) {
998 d7464085 2018-07-09 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET)
1000 638f9024 2019-05-13 stsp err = got_error_from_errno("lseek");
1001 d7464085 2018-07-09 stsp goto done;
1004 d7464085 2018-07-09 stsp if (base_file) {
1005 d7464085 2018-07-09 stsp if (pack->map) {
1006 d7464085 2018-07-09 stsp mapoff = (size_t)delta_data_offset;
1007 d7464085 2018-07-09 stsp err = got_inflate_to_file_mmap(
1008 34fca9c3 2018-11-11 stsp &base_bufsz, pack->map, mapoff,
1009 d7464085 2018-07-09 stsp pack->filesize - mapoff, base_file);
1011 34fca9c3 2018-11-11 stsp err = got_inflate_to_file_fd(
1012 34fca9c3 2018-11-11 stsp &base_bufsz, pack->fd, base_file);
1014 d7464085 2018-07-09 stsp if (pack->map) {
1015 d7464085 2018-07-09 stsp mapoff = (size_t)delta_data_offset;
1016 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&base_buf,
1017 34fca9c3 2018-11-11 stsp &base_bufsz, pack->map, mapoff,
1018 d7464085 2018-07-09 stsp pack->filesize - mapoff);
1020 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&base_buf,
1021 34fca9c3 2018-11-11 stsp &base_bufsz, pack->fd);
1024 a6b158cc 2018-02-11 stsp goto done;
1026 8628c62d 2018-03-15 stsp if (base_file)
1027 8628c62d 2018-03-15 stsp rewind(base_file);
1031 8628c62d 2018-03-15 stsp if (base_buf) {
1032 34fca9c3 2018-11-11 stsp err = got_delta_apply_in_mem(base_buf, base_bufsz,
1033 34fca9c3 2018-11-11 stsp delta->delta_buf, delta->delta_len, accum_buf,
1034 34fca9c3 2018-11-11 stsp &accum_size, max_size);
1037 a53d2f13 2018-03-17 stsp err = got_delta_apply(base_file, delta->delta_buf,
1038 a53d2f13 2018-03-17 stsp delta->delta_len,
1039 8628c62d 2018-03-15 stsp /* Final delta application writes to output file. */
1040 b29656e2 2018-03-16 stsp ++n < deltas->nentries ? accum_file : outfile,
1041 b29656e2 2018-03-16 stsp &accum_size);
1044 6691714a 2018-01-23 stsp goto done;
1046 710bb5ca 2018-01-23 stsp if (n < deltas->nentries) {
1047 6691714a 2018-01-23 stsp /* Accumulated delta becomes the new base. */
1048 8628c62d 2018-03-15 stsp if (base_buf) {
1049 8628c62d 2018-03-15 stsp uint8_t *tmp = accum_buf;
1051 34fca9c3 2018-11-11 stsp * Base buffer switches roles with accumulation
1052 34fca9c3 2018-11-11 stsp * buffer. Ensure it can hold the largest
1053 34fca9c3 2018-11-11 stsp * result in the delta chain. The initial
1054 34fca9c3 2018-11-11 stsp * allocation might have been smaller.
1056 34fca9c3 2018-11-11 stsp if (base_bufsz < max_size) {
1057 34fca9c3 2018-11-11 stsp uint8_t *p;
1058 34fca9c3 2018-11-11 stsp p = reallocarray(base_buf, 1, max_size);
1059 34fca9c3 2018-11-11 stsp if (p == NULL) {
1060 638f9024 2019-05-13 stsp err = got_error_from_errno(
1061 230a42bd 2019-05-11 jcs "reallocarray");
1062 34fca9c3 2018-11-11 stsp goto done;
1064 34fca9c3 2018-11-11 stsp base_buf = p;
1065 34fca9c3 2018-11-11 stsp base_bufsz = max_size;
1067 8628c62d 2018-03-15 stsp accum_buf = base_buf;
1068 8628c62d 2018-03-15 stsp base_buf = tmp;
1070 8628c62d 2018-03-15 stsp FILE *tmp = accum_file;
1071 8628c62d 2018-03-15 stsp accum_file = base_file;
1072 8628c62d 2018-03-15 stsp base_file = tmp;
1073 8628c62d 2018-03-15 stsp rewind(base_file);
1074 8628c62d 2018-03-15 stsp rewind(accum_file);
1080 8628c62d 2018-03-15 stsp free(base_buf);
1081 8628c62d 2018-03-15 stsp if (accum_buf) {
1082 8628c62d 2018-03-15 stsp size_t len = fwrite(accum_buf, 1, accum_size, outfile);
1083 8628c62d 2018-03-15 stsp free(accum_buf);
1084 8628c62d 2018-03-15 stsp if (len != accum_size)
1085 673702af 2018-07-23 stsp err = got_ferror(outfile, GOT_ERR_IO);
1087 6691714a 2018-01-23 stsp rewind(outfile);
1088 b29656e2 2018-03-16 stsp if (err == NULL)
1089 b29656e2 2018-03-16 stsp *result_size = accum_size;
1090 e0ab43e7 2018-03-16 stsp return err;
1093 e0ab43e7 2018-03-16 stsp static const struct got_error *
1094 e0ab43e7 2018-03-16 stsp dump_delta_chain_to_mem(uint8_t **outbuf, size_t *outlen,
1095 48095039 2018-09-09 stsp struct got_delta_chain *deltas, struct got_pack *pack)
1097 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1098 e0ab43e7 2018-03-16 stsp struct got_delta *delta;
1099 e0ab43e7 2018-03-16 stsp uint8_t *base_buf = NULL, *accum_buf = NULL;
1100 34fca9c3 2018-11-11 stsp size_t base_bufsz = 0, accum_size = 0;
1101 e0ab43e7 2018-03-16 stsp uint64_t max_size;
1102 e0ab43e7 2018-03-16 stsp int n = 0;
1104 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1105 e0ab43e7 2018-03-16 stsp *outlen = 0;
1107 e0ab43e7 2018-03-16 stsp if (SIMPLEQ_EMPTY(&deltas->entries))
1108 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
1110 40426839 2018-03-17 stsp err = get_delta_chain_max_size(&max_size, deltas);
1112 e0ab43e7 2018-03-16 stsp return err;
1113 e0ab43e7 2018-03-16 stsp accum_buf = malloc(max_size);
1114 e0ab43e7 2018-03-16 stsp if (accum_buf == NULL)
1115 638f9024 2019-05-13 stsp return got_error_from_errno("malloc");
1117 e0ab43e7 2018-03-16 stsp /* Deltas are ordered in ascending order. */
1118 e0ab43e7 2018-03-16 stsp SIMPLEQ_FOREACH(delta, &deltas->entries, entry) {
1119 e0ab43e7 2018-03-16 stsp if (n == 0) {
1120 0c048b15 2018-04-27 stsp size_t delta_data_offset;
1122 e0ab43e7 2018-03-16 stsp /* Plain object types are the delta base. */
1123 e0ab43e7 2018-03-16 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1124 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1125 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1126 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1127 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1128 72eb3431 2018-04-01 stsp goto done;
1131 0c048b15 2018-04-27 stsp delta_data_offset = delta->offset + delta->tslen;
1132 0c048b15 2018-04-27 stsp if (delta_data_offset >= pack->filesize) {
1133 0c048b15 2018-04-27 stsp err = got_error(GOT_ERR_PACK_OFFSET);
1134 0c048b15 2018-04-27 stsp goto done;
1136 d7464085 2018-07-09 stsp if (pack->map) {
1137 d7464085 2018-07-09 stsp size_t mapoff = (size_t)delta_data_offset;
1138 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&base_buf,
1139 34fca9c3 2018-11-11 stsp &base_bufsz, pack->map, mapoff,
1140 d7464085 2018-07-09 stsp pack->filesize - mapoff);
1142 d7464085 2018-07-09 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET)
1144 638f9024 2019-05-13 stsp err = got_error_from_errno("lseek");
1145 d7464085 2018-07-09 stsp goto done;
1147 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&base_buf,
1148 34fca9c3 2018-11-11 stsp &base_bufsz, pack->fd);
1151 d7464085 2018-07-09 stsp goto done;
1156 34fca9c3 2018-11-11 stsp err = got_delta_apply_in_mem(base_buf, base_bufsz,
1157 34fca9c3 2018-11-11 stsp delta->delta_buf, delta->delta_len, accum_buf,
1158 34fca9c3 2018-11-11 stsp &accum_size, max_size);
1161 e0ab43e7 2018-03-16 stsp goto done;
1163 e0ab43e7 2018-03-16 stsp if (n < deltas->nentries) {
1164 e0ab43e7 2018-03-16 stsp /* Accumulated delta becomes the new base. */
1165 e0ab43e7 2018-03-16 stsp uint8_t *tmp = accum_buf;
1167 34fca9c3 2018-11-11 stsp * Base buffer switches roles with accumulation buffer.
1168 34fca9c3 2018-11-11 stsp * Ensure it can hold the largest result in the delta
1169 34fca9c3 2018-11-11 stsp * chain. Initial allocation might have been smaller.
1171 34fca9c3 2018-11-11 stsp if (base_bufsz < max_size) {
1172 34fca9c3 2018-11-11 stsp uint8_t *p;
1173 34fca9c3 2018-11-11 stsp p = reallocarray(base_buf, 1, max_size);
1174 34fca9c3 2018-11-11 stsp if (p == NULL) {
1175 638f9024 2019-05-13 stsp err = got_error_from_errno(
1176 230a42bd 2019-05-11 jcs "reallocarray");
1177 34fca9c3 2018-11-11 stsp goto done;
1179 34fca9c3 2018-11-11 stsp base_buf = p;
1180 34fca9c3 2018-11-11 stsp base_bufsz = max_size;
1182 e0ab43e7 2018-03-16 stsp accum_buf = base_buf;
1183 e0ab43e7 2018-03-16 stsp base_buf = tmp;
1188 e0ab43e7 2018-03-16 stsp free(base_buf);
1189 e0ab43e7 2018-03-16 stsp if (err) {
1190 e0ab43e7 2018-03-16 stsp free(accum_buf);
1191 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1192 e0ab43e7 2018-03-16 stsp *outlen = 0;
1194 e0ab43e7 2018-03-16 stsp *outbuf = accum_buf;
1195 e0ab43e7 2018-03-16 stsp *outlen = accum_size;
1197 efd2a263 2018-01-19 stsp return err;
1200 3ee5fc21 2018-01-17 stsp const struct got_error *
1201 24140570 2018-09-09 stsp got_packfile_extract_object(struct got_pack *pack, struct got_object *obj,
1202 3840f4c9 2018-09-12 stsp FILE *outfile, FILE *base_file, FILE *accum_file)
1204 3ee5fc21 2018-01-17 stsp const struct got_error *err = NULL;
1206 3ee5fc21 2018-01-17 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1207 3ee5fc21 2018-01-17 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1209 ef2bccd9 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1210 24140570 2018-09-09 stsp if (obj->pack_offset >= pack->filesize)
1211 24140570 2018-09-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1213 d7464085 2018-07-09 stsp if (pack->map) {
1214 d7464085 2018-07-09 stsp size_t mapoff = (size_t)obj->pack_offset;
1215 d7464085 2018-07-09 stsp err = got_inflate_to_file_mmap(&obj->size, pack->map,
1216 24140570 2018-09-09 stsp mapoff, pack->filesize - mapoff, outfile);
1218 24140570 2018-09-09 stsp if (lseek(pack->fd, obj->pack_offset, SEEK_SET) == -1)
1219 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
1220 24140570 2018-09-09 stsp err = got_inflate_to_file_fd(&obj->size, pack->fd,
1224 2ce68b2f 2018-09-09 stsp err = dump_delta_chain_to_file(&obj->size, &obj->deltas, pack,
1225 3840f4c9 2018-09-12 stsp outfile, base_file, accum_file);
1227 a1fd68d8 2018-01-12 stsp return err;
1230 e0ab43e7 2018-03-16 stsp const struct got_error *
1231 e0ab43e7 2018-03-16 stsp got_packfile_extract_object_to_mem(uint8_t **buf, size_t *len,
1232 7e212e3d 2018-09-09 stsp struct got_object *obj, struct got_pack *pack)
1234 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1236 e0ab43e7 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1237 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1239 48095039 2018-09-09 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1240 7e212e3d 2018-09-09 stsp if (obj->pack_offset >= pack->filesize)
1241 7e212e3d 2018-09-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1242 d7464085 2018-07-09 stsp if (pack->map) {
1243 d7464085 2018-07-09 stsp size_t mapoff = (size_t)obj->pack_offset;
1244 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(buf, len, pack->map,
1245 d7464085 2018-07-09 stsp mapoff, pack->filesize - mapoff);
1247 7e212e3d 2018-09-09 stsp if (lseek(pack->fd, obj->pack_offset, SEEK_SET) == -1)
1248 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
1249 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(buf, len, pack->fd);
1252 48095039 2018-09-09 stsp err = dump_delta_chain_to_mem(buf, len, &obj->deltas, pack);
1254 e0ab43e7 2018-03-16 stsp return err;
