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 ac62b712 2021-03-30 stsp if (*h->magic != htobe32(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 ac62b712 2021-03-30 stsp if (*h->version != htobe32(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 ac62b712 2021-03-30 stsp uint32_t o = h->offsets[i];
263 ac62b712 2021-03-30 stsp if (o & htobe32(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 6d5a9006 2020-12-16 yzhong got_packidx_open(struct got_packidx **packidx,
332 6d5a9006 2020-12-16 yzhong int dir_fd, const char *relpath, int verify)
334 817c5a18 2018-09-09 stsp const struct got_error *err = NULL;
335 1124fe40 2021-07-07 stsp struct got_packidx *p = NULL;
336 1124fe40 2021-07-07 stsp char *pack_relpath;
337 57377f07 2019-05-23 stsp struct stat sb;
339 817c5a18 2018-09-09 stsp *packidx = NULL;
341 1124fe40 2021-07-07 stsp err = got_packidx_get_packfile_path(&pack_relpath, relpath);
343 1124fe40 2021-07-07 stsp return err;
346 1124fe40 2021-07-07 stsp * Ensure that a corresponding pack file exists.
347 1124fe40 2021-07-07 stsp * Some Git repositories have this problem. Git seems to ignore
348 1124fe40 2021-07-07 stsp * the existence of lonely pack index files but we do not.
350 1124fe40 2021-07-07 stsp if (fstatat(dir_fd, pack_relpath, &sb, 0) == -1) {
351 1124fe40 2021-07-07 stsp if (errno == ENOENT) {
352 1124fe40 2021-07-07 stsp err = got_error_fmt(GOT_ERR_LONELY_PACKIDX,
353 1124fe40 2021-07-07 stsp "%s", relpath);
355 1124fe40 2021-07-07 stsp err = got_error_from_errno2("fstatat", pack_relpath);
359 817c5a18 2018-09-09 stsp p = calloc(1, sizeof(*p));
360 1124fe40 2021-07-07 stsp if (p == NULL) {
361 1124fe40 2021-07-07 stsp err = got_error_from_errno("calloc");
365 6d5a9006 2020-12-16 yzhong p->fd = openat(dir_fd, relpath, O_RDONLY | O_NOFOLLOW);
366 6772cf22 2019-08-28 hiltjo if (p->fd == -1) {
367 6d5a9006 2020-12-16 yzhong err = got_error_from_errno2("openat", relpath);
372 57377f07 2019-05-23 stsp if (fstat(p->fd, &sb) != 0) {
373 6d5a9006 2020-12-16 yzhong err = got_error_from_errno2("fstat", relpath);
374 817c5a18 2018-09-09 stsp close(p->fd);
378 57377f07 2019-05-23 stsp p->len = sb.st_size;
379 817c5a18 2018-09-09 stsp if (p->len < sizeof(p->hdr)) {
380 817c5a18 2018-09-09 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
381 817c5a18 2018-09-09 stsp close(p->fd);
386 6d5a9006 2020-12-16 yzhong p->path_packidx = strdup(relpath);
387 817c5a18 2018-09-09 stsp if (p->path_packidx == NULL) {
388 638f9024 2019-05-13 stsp err = got_error_from_errno("strdup");
392 817c5a18 2018-09-09 stsp #ifndef GOT_PACK_NO_MMAP
393 817c5a18 2018-09-09 stsp p->map = mmap(NULL, p->len, PROT_READ, MAP_PRIVATE, p->fd, 0);
394 3a11398b 2019-02-21 stsp if (p->map == MAP_FAILED) {
395 3a11398b 2019-02-21 stsp if (errno != ENOMEM) {
396 638f9024 2019-05-13 stsp err = got_error_from_errno("mmap");
399 817c5a18 2018-09-09 stsp p->map = NULL; /* fall back to read(2) */
403 817c5a18 2018-09-09 stsp err = got_packidx_init_hdr(p, verify);
407 1124fe40 2021-07-07 stsp got_packidx_close(p);
409 0a0a3048 2018-01-10 stsp *packidx = p;
410 1124fe40 2021-07-07 stsp free(pack_relpath);
411 0a0a3048 2018-01-10 stsp return err;
414 57b35b75 2018-06-22 stsp const struct got_error *
415 6fd11751 2018-06-04 stsp got_packidx_close(struct got_packidx *packidx)
417 57b35b75 2018-06-22 stsp const struct got_error *err = NULL;
419 6fd11751 2018-06-04 stsp free(packidx->path_packidx);
420 fc79a48d 2018-07-09 stsp if (packidx->map) {
421 57b35b75 2018-06-22 stsp if (munmap(packidx->map, packidx->len) == -1)
422 638f9024 2019-05-13 stsp err = got_error_from_errno("munmap");
424 fc79a48d 2018-07-09 stsp free(packidx->hdr.magic);
425 fc79a48d 2018-07-09 stsp free(packidx->hdr.version);
426 fc79a48d 2018-07-09 stsp free(packidx->hdr.fanout_table);
427 fc79a48d 2018-07-09 stsp free(packidx->hdr.sorted_ids);
428 fc79a48d 2018-07-09 stsp free(packidx->hdr.crc32);
429 fc79a48d 2018-07-09 stsp free(packidx->hdr.offsets);
430 fc79a48d 2018-07-09 stsp free(packidx->hdr.large_offsets);
431 fc79a48d 2018-07-09 stsp free(packidx->hdr.trailer);
433 08578a35 2021-01-22 stsp if (close(packidx->fd) == -1 && err == NULL)
434 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
435 0a0a3048 2018-01-10 stsp free(packidx);
437 57b35b75 2018-06-22 stsp return err;
440 509c9973 2021-04-10 stsp const struct got_error *
441 aea75d87 2021-07-06 stsp got_packidx_get_packfile_path(char **path_packfile, const char *path_packidx)
443 509c9973 2021-04-10 stsp size_t size;
445 509c9973 2021-04-10 stsp /* Packfile path contains ".pack" instead of ".idx", so add one byte. */
446 aea75d87 2021-07-06 stsp size = strlen(path_packidx) + 2;
447 509c9973 2021-04-10 stsp if (size < GOT_PACKFILE_NAMELEN + 1)
448 aea75d87 2021-07-06 stsp return got_error_path(path_packidx, GOT_ERR_BAD_PATH);
450 509c9973 2021-04-10 stsp *path_packfile = malloc(size);
451 509c9973 2021-04-10 stsp if (*path_packfile == NULL)
452 509c9973 2021-04-10 stsp return got_error_from_errno("malloc");
454 509c9973 2021-04-10 stsp /* Copy up to and excluding ".idx". */
455 aea75d87 2021-07-06 stsp if (strlcpy(*path_packfile, path_packidx,
456 509c9973 2021-04-10 stsp size - strlen(GOT_PACKIDX_SUFFIX) - 1) >= size)
457 509c9973 2021-04-10 stsp return got_error(GOT_ERR_NO_SPACE);
459 509c9973 2021-04-10 stsp if (strlcat(*path_packfile, GOT_PACKFILE_SUFFIX, size) >= size)
460 509c9973 2021-04-10 stsp return got_error(GOT_ERR_NO_SPACE);
462 509c9973 2021-04-10 stsp return NULL;
466 02828bfd 2021-06-22 stsp got_packidx_get_object_offset(struct got_packidx *packidx, int idx)
468 78fb0967 2020-09-09 naddy uint32_t offset = be32toh(packidx->hdr.offsets[idx]);
469 a1fd68d8 2018-01-12 stsp if (offset & GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX) {
470 a1fd68d8 2018-01-12 stsp uint64_t loffset;
471 a1fd68d8 2018-01-12 stsp idx = offset & GOT_PACKIDX_OFFSET_VAL_MASK;
472 5e6be232 2019-11-08 stsp if (idx < 0 || idx >= packidx->nlargeobj ||
473 6fd11751 2018-06-04 stsp packidx->hdr.large_offsets == NULL)
475 78fb0967 2020-09-09 naddy loffset = be64toh(packidx->hdr.large_offsets[idx]);
476 a1fd68d8 2018-01-12 stsp return (loffset > INT64_MAX ? -1 : (off_t)loffset);
478 a1fd68d8 2018-01-12 stsp return (off_t)(offset & GOT_PACKIDX_OFFSET_VAL_MASK);
482 00927983 2020-04-19 stsp got_packidx_get_object_idx(struct got_packidx *packidx, struct got_object_id *id)
484 00927983 2020-04-19 stsp u_int8_t id0 = id->sha1[0];
485 78fb0967 2020-09-09 naddy uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
486 40aeb19c 2018-06-22 stsp int left = 0, right = totobj - 1;
488 a1fd68d8 2018-01-12 stsp if (id0 > 0)
489 78fb0967 2020-09-09 naddy left = be32toh(packidx->hdr.fanout_table[id0 - 1]);
491 40aeb19c 2018-06-22 stsp while (left <= right) {
492 57b35b75 2018-06-22 stsp struct got_packidx_object_id *oid;
493 40aeb19c 2018-06-22 stsp int i, cmp;
495 40aeb19c 2018-06-22 stsp i = ((left + right) / 2);
496 40aeb19c 2018-06-22 stsp oid = &packidx->hdr.sorted_ids[i];
497 00927983 2020-04-19 stsp cmp = memcmp(id->sha1, oid->sha1, SHA1_DIGEST_LENGTH);
498 16dcbf91 2018-04-01 stsp if (cmp == 0)
500 40aeb19c 2018-06-22 stsp else if (cmp > 0)
501 40aeb19c 2018-06-22 stsp left = i + 1;
502 40aeb19c 2018-06-22 stsp else if (cmp < 0)
503 40aeb19c 2018-06-22 stsp right = i - 1;
509 876c234b 2018-09-10 stsp const struct got_error *
510 dd88155e 2019-06-29 stsp got_packidx_match_id_str_prefix(struct got_object_id_queue *matched_ids,
511 4277420a 2019-06-29 stsp struct got_packidx *packidx, const char *id_str_prefix)
513 dd88155e 2019-06-29 stsp const struct got_error *err = NULL;
514 4277420a 2019-06-29 stsp u_int8_t id0;
515 78fb0967 2020-09-09 naddy uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
516 4277420a 2019-06-29 stsp char hex[3];
517 4277420a 2019-06-29 stsp size_t prefix_len = strlen(id_str_prefix);
518 e09a504c 2019-06-28 stsp struct got_packidx_object_id *oid;
519 5a17689a 2020-09-24 stsp uint32_t i;
521 dbdddfee 2021-06-23 naddy STAILQ_INIT(matched_ids);
523 4277420a 2019-06-29 stsp if (prefix_len < 2)
524 6dd1ece6 2019-11-10 stsp return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
526 4277420a 2019-06-29 stsp hex[0] = id_str_prefix[0];
527 4277420a 2019-06-29 stsp hex[1] = id_str_prefix[1];
528 4277420a 2019-06-29 stsp hex[2] = '\0';
529 4277420a 2019-06-29 stsp if (!got_parse_xdigit(&id0, hex))
530 6dd1ece6 2019-11-10 stsp return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
532 78fb0967 2020-09-09 naddy i = be32toh(packidx->hdr.fanout_table[id0 - 1]);
533 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[i];
534 4277420a 2019-06-29 stsp while (i < totobj && oid->sha1[0] == id0) {
535 4277420a 2019-06-29 stsp char id_str[SHA1_DIGEST_STRING_LENGTH];
536 dd88155e 2019-06-29 stsp struct got_object_qid *qid;
539 4277420a 2019-06-29 stsp if (!got_sha1_digest_to_str(oid->sha1, id_str, sizeof(id_str)))
540 4277420a 2019-06-29 stsp return got_error(GOT_ERR_NO_SPACE);
542 4277420a 2019-06-29 stsp cmp = strncmp(id_str, id_str_prefix, prefix_len);
543 4277420a 2019-06-29 stsp if (cmp < 0) {
544 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[++i];
546 4277420a 2019-06-29 stsp } else if (cmp > 0)
549 dd88155e 2019-06-29 stsp err = got_object_qid_alloc_partial(&qid);
552 dd88155e 2019-06-29 stsp memcpy(qid->id->sha1, oid->sha1, SHA1_DIGEST_LENGTH);
553 dbdddfee 2021-06-23 naddy STAILQ_INSERT_TAIL(matched_ids, qid, entry);
555 4277420a 2019-06-29 stsp oid = &packidx->hdr.sorted_ids[++i];
559 0adc7bcc 2019-06-29 stsp got_object_id_queue_free(matched_ids);
560 dd88155e 2019-06-29 stsp return err;
563 b4f37570 2021-06-19 stsp static const struct got_error *
564 b4f37570 2021-06-19 stsp pack_stop_privsep_child(struct got_pack *pack)
566 96732e0b 2018-11-11 stsp const struct got_error *err = NULL;
568 876c234b 2018-09-10 stsp if (pack->privsep_child == NULL)
569 876c234b 2018-09-10 stsp return NULL;
571 876c234b 2018-09-10 stsp err = got_privsep_send_stop(pack->privsep_child->imsg_fd);
573 96732e0b 2018-11-11 stsp return err;
574 96732e0b 2018-11-11 stsp err = got_privsep_wait_for_child(pack->privsep_child->pid);
575 08578a35 2021-01-22 stsp if (close(pack->privsep_child->imsg_fd) == -1 && err == NULL)
576 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
577 cc2a8ef4 2021-06-19 tracey imsg_clear(pack->privsep_child->ibuf);
578 cc2a8ef4 2021-06-19 tracey free(pack->privsep_child->ibuf);
579 876c234b 2018-09-10 stsp free(pack->privsep_child);
580 876c234b 2018-09-10 stsp pack->privsep_child = NULL;
581 876c234b 2018-09-10 stsp return err;
584 d7464085 2018-07-09 stsp const struct got_error *
585 7e656b93 2018-03-17 stsp got_pack_close(struct got_pack *pack)
587 d7464085 2018-07-09 stsp const struct got_error *err = NULL;
589 b4f37570 2021-06-19 stsp err = pack_stop_privsep_child(pack);
590 876c234b 2018-09-10 stsp if (pack->map && munmap(pack->map, pack->filesize) == -1 && !err)
591 638f9024 2019-05-13 stsp err = got_error_from_errno("munmap");
592 08578a35 2021-01-22 stsp if (pack->fd != -1 && close(pack->fd) == -1 && err == NULL)
593 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
594 8b2180d4 2018-04-26 stsp pack->fd = -1;
595 4589e373 2018-03-17 stsp free(pack->path_packfile);
596 4589e373 2018-03-17 stsp pack->path_packfile = NULL;
597 4589e373 2018-03-17 stsp pack->filesize = 0;
598 ab2f42e7 2019-11-10 stsp if (pack->delta_cache) {
599 ab2f42e7 2019-11-10 stsp got_delta_cache_free(pack->delta_cache);
600 ab2f42e7 2019-11-10 stsp pack->delta_cache = NULL;
603 c7fe698a 2018-01-23 stsp return err;
606 668a20f6 2020-03-18 stsp const struct got_error *
607 668a20f6 2020-03-18 stsp got_pack_parse_object_type_and_size(uint8_t *type, uint64_t *size, size_t *len,
608 d7464085 2018-07-09 stsp struct got_pack *pack, off_t offset)
610 a487c1d0 2018-01-14 stsp uint8_t t = 0;
611 a487c1d0 2018-01-14 stsp uint64_t s = 0;
612 a487c1d0 2018-01-14 stsp uint8_t sizeN;
613 d7464085 2018-07-09 stsp size_t mapoff = 0;
618 d7464085 2018-07-09 stsp if (offset >= pack->filesize)
619 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
621 d7464085 2018-07-09 stsp if (pack->map) {
622 d7464085 2018-07-09 stsp mapoff = (size_t)offset;
624 d7464085 2018-07-09 stsp if (lseek(pack->fd, offset, SEEK_SET) == -1)
625 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
629 a1fd68d8 2018-01-12 stsp /* We do not support size values which don't fit in 64 bit. */
631 a487c1d0 2018-01-14 stsp return got_error(GOT_ERR_NO_SPACE);
633 d7464085 2018-07-09 stsp if (pack->map) {
634 d7464085 2018-07-09 stsp sizeN = *(pack->map + mapoff);
635 d7464085 2018-07-09 stsp mapoff += sizeof(sizeN);
637 d7464085 2018-07-09 stsp ssize_t n = read(pack->fd, &sizeN, sizeof(sizeN));
639 638f9024 2019-05-13 stsp return got_error_from_errno("read");
640 d7464085 2018-07-09 stsp if (n != sizeof(sizeN))
641 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
643 d7464085 2018-07-09 stsp *len += sizeof(sizeN);
645 a1fd68d8 2018-01-12 stsp if (i == 0) {
646 a487c1d0 2018-01-14 stsp t = (sizeN & GOT_PACK_OBJ_SIZE0_TYPE_MASK) >>
647 a1fd68d8 2018-01-12 stsp GOT_PACK_OBJ_SIZE0_TYPE_MASK_SHIFT;
648 a487c1d0 2018-01-14 stsp s = (sizeN & GOT_PACK_OBJ_SIZE0_VAL_MASK);
650 a1fd68d8 2018-01-12 stsp size_t shift = 4 + 7 * (i - 1);
651 a487c1d0 2018-01-14 stsp s |= ((sizeN & GOT_PACK_OBJ_SIZE_VAL_MASK) << shift);
654 a1fd68d8 2018-01-12 stsp } while (sizeN & GOT_PACK_OBJ_SIZE_MORE);
658 a487c1d0 2018-01-14 stsp return NULL;
661 a1fd68d8 2018-01-12 stsp static const struct got_error *
662 5f25cc85 2019-11-26 stsp open_plain_object(struct got_object **obj, struct got_object_id *id,
663 5f25cc85 2019-11-26 stsp uint8_t type, off_t offset, size_t size, int idx)
665 6ccb713b 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
666 6ccb713b 2018-01-19 stsp if (*obj == NULL)
667 638f9024 2019-05-13 stsp return got_error_from_errno("calloc");
669 6ccb713b 2018-01-19 stsp (*obj)->type = type;
670 6ccb713b 2018-01-19 stsp (*obj)->flags = GOT_OBJ_FLAG_PACKED;
671 c59b3346 2018-09-11 stsp (*obj)->pack_idx = idx;
672 6ccb713b 2018-01-19 stsp (*obj)->hdrlen = 0;
673 6ccb713b 2018-01-19 stsp (*obj)->size = size;
674 106807b4 2018-09-15 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
675 6ccb713b 2018-01-19 stsp (*obj)->pack_offset = offset;
677 b107e67f 2018-01-19 stsp return NULL;
680 b107e67f 2018-01-19 stsp static const struct got_error *
681 d7464085 2018-07-09 stsp parse_negative_offset(int64_t *offset, size_t *len, struct got_pack *pack,
682 d7464085 2018-07-09 stsp off_t delta_offset)
684 b107e67f 2018-01-19 stsp int64_t o = 0;
685 b107e67f 2018-01-19 stsp uint8_t offN;
688 a0de39f3 2019-08-09 stsp *offset = 0;
692 b107e67f 2018-01-19 stsp /* We do not support offset values which don't fit in 64 bit. */
694 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_NO_SPACE);
696 d7464085 2018-07-09 stsp if (pack->map) {
697 d7464085 2018-07-09 stsp size_t mapoff;
698 d7464085 2018-07-09 stsp if (delta_offset >= pack->filesize)
699 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
700 d7464085 2018-07-09 stsp mapoff = (size_t)delta_offset + *len;
701 d7464085 2018-07-09 stsp offN = *(pack->map + mapoff);
704 d7464085 2018-07-09 stsp n = read(pack->fd, &offN, sizeof(offN));
706 638f9024 2019-05-13 stsp return got_error_from_errno("read");
707 d7464085 2018-07-09 stsp if (n != sizeof(offN))
708 d7464085 2018-07-09 stsp return got_error(GOT_ERR_BAD_PACKFILE);
710 d7464085 2018-07-09 stsp *len += sizeof(offN);
712 b107e67f 2018-01-19 stsp if (i == 0)
713 b107e67f 2018-01-19 stsp o = (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
717 cecc778e 2018-01-23 stsp o += (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
720 b107e67f 2018-01-19 stsp } while (offN & GOT_PACK_OBJ_DELTA_OFF_MORE);
722 b107e67f 2018-01-19 stsp *offset = o;
723 6ccb713b 2018-01-19 stsp return NULL;
726 668a20f6 2020-03-18 stsp const struct got_error *
727 668a20f6 2020-03-18 stsp got_pack_parse_offset_delta(off_t *base_offset, size_t *len, struct got_pack *pack,
728 d7464085 2018-07-09 stsp off_t offset, int tslen)
730 96f5e8b3 2018-01-23 stsp const struct got_error *err;
731 b107e67f 2018-01-19 stsp int64_t negoffset;
732 b107e67f 2018-01-19 stsp size_t negofflen;
736 d7464085 2018-07-09 stsp err = parse_negative_offset(&negoffset, &negofflen, pack,
737 d7464085 2018-07-09 stsp offset + tslen);
739 b107e67f 2018-01-19 stsp return err;
741 b107e67f 2018-01-19 stsp /* Compute the base object's offset (must be in the same pack file). */
742 96f5e8b3 2018-01-23 stsp *base_offset = (offset - negoffset);
743 96f5e8b3 2018-01-23 stsp if (*base_offset <= 0)
744 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_BAD_PACKFILE);
746 d7464085 2018-07-09 stsp *len = negofflen;
747 96f5e8b3 2018-01-23 stsp return NULL;
750 0e22967e 2018-02-11 stsp static const struct got_error *
751 42c69117 2019-11-10 stsp read_delta_data(uint8_t **delta_buf, size_t *delta_len,
752 42c69117 2019-11-10 stsp size_t delta_data_offset, struct got_pack *pack)
754 42c69117 2019-11-10 stsp const struct got_error *err = NULL;
756 42c69117 2019-11-10 stsp if (pack->map) {
757 42c69117 2019-11-10 stsp if (delta_data_offset >= pack->filesize)
758 42c69117 2019-11-10 stsp return got_error(GOT_ERR_PACK_OFFSET);
759 2e5a6fad 2020-03-18 stsp err = got_inflate_to_mem_mmap(delta_buf, delta_len,
760 2e5a6fad 2020-03-18 stsp NULL, NULL, pack->map, delta_data_offset,
761 2e5a6fad 2020-03-18 stsp pack->filesize - delta_data_offset);
763 42c69117 2019-11-10 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET) == -1)
764 42c69117 2019-11-10 stsp return got_error_from_errno("lseek");
765 3ab5e33c 2020-03-18 stsp err = got_inflate_to_mem_fd(delta_buf, delta_len, NULL,
766 55fdd257 2020-03-18 stsp NULL, 0, pack->fd);
768 42c69117 2019-11-10 stsp return err;
771 96f5e8b3 2018-01-23 stsp static const struct got_error *
772 c336f889 2018-07-23 stsp add_delta(struct got_delta_chain *deltas, off_t delta_offset, size_t tslen,
773 42c69117 2019-11-10 stsp int delta_type, size_t delta_size, size_t delta_data_offset)
775 bdd2fbb3 2018-02-11 stsp struct got_delta *delta;
777 c336f889 2018-07-23 stsp delta = got_delta_open(delta_offset, tslen, delta_type, delta_size,
778 42c69117 2019-11-10 stsp delta_data_offset);
779 bdd2fbb3 2018-02-11 stsp if (delta == NULL)
780 638f9024 2019-05-13 stsp return got_error_from_errno("got_delta_open");
781 bdd2fbb3 2018-02-11 stsp /* delta is freed in got_object_close() */
782 bdd2fbb3 2018-02-11 stsp deltas->nentries++;
783 dbdddfee 2021-06-23 naddy STAILQ_INSERT_HEAD(&deltas->entries, delta, entry);
784 bdd2fbb3 2018-02-11 stsp return NULL;
787 bdd2fbb3 2018-02-11 stsp static const struct got_error *
788 6b9c9673 2018-01-23 stsp resolve_offset_delta(struct got_delta_chain *deltas,
789 c8ecd499 2018-09-09 stsp struct got_packidx *packidx, struct got_pack *pack, off_t delta_offset,
790 c8ecd499 2018-09-09 stsp size_t tslen, int delta_type, size_t delta_size, unsigned int recursion)
793 a3500804 2018-01-23 stsp const struct got_error *err;
794 c3703302 2018-01-23 stsp off_t base_offset;
795 c3703302 2018-01-23 stsp uint8_t base_type;
796 c3703302 2018-01-23 stsp uint64_t base_size;
797 c3703302 2018-01-23 stsp size_t base_tslen;
798 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
799 42c69117 2019-11-10 stsp size_t consumed;
801 668a20f6 2020-03-18 stsp err = got_pack_parse_offset_delta(&base_offset, &consumed, pack,
802 d7464085 2018-07-09 stsp delta_offset, tslen);
804 a3500804 2018-01-23 stsp return err;
806 d7464085 2018-07-09 stsp delta_data_offset = delta_offset + tslen + consumed;
807 d7464085 2018-07-09 stsp if (delta_data_offset >= pack->filesize)
808 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
810 d7464085 2018-07-09 stsp if (pack->map == NULL) {
811 d7464085 2018-07-09 stsp delta_data_offset = lseek(pack->fd, 0, SEEK_CUR);
812 d7464085 2018-07-09 stsp if (delta_data_offset == -1)
813 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
816 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type, delta_size,
817 42c69117 2019-11-10 stsp delta_data_offset);
819 1a35c1bc 2019-05-22 stsp return err;
821 c3703302 2018-01-23 stsp /* An offset delta must be in the same packfile. */
822 1a35c1bc 2019-05-22 stsp if (base_offset >= pack->filesize)
823 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_PACK_OFFSET);
825 668a20f6 2020-03-18 stsp err = got_pack_parse_object_type_and_size(&base_type, &base_size,
826 668a20f6 2020-03-18 stsp &base_tslen, pack, base_offset);
828 1a35c1bc 2019-05-22 stsp return err;
830 668a20f6 2020-03-18 stsp return got_pack_resolve_delta_chain(deltas, packidx, pack, base_offset,
831 b0e2201a 2018-06-22 stsp base_tslen, base_type, base_size, recursion - 1);
834 c4330eff 2021-06-22 stsp const struct got_error *
835 c4330eff 2021-06-22 stsp got_pack_parse_ref_delta(struct got_object_id *id,
836 c4330eff 2021-06-22 stsp struct got_pack *pack, off_t delta_offset, int tslen)
838 c4330eff 2021-06-22 stsp if (pack->map) {
839 c4330eff 2021-06-22 stsp size_t mapoff = delta_offset + tslen;
840 c4330eff 2021-06-22 stsp memcpy(id, pack->map + mapoff, sizeof(*id));
843 c4330eff 2021-06-22 stsp n = read(pack->fd, id, sizeof(*id));
845 c4330eff 2021-06-22 stsp return got_error_from_errno("read");
846 c4330eff 2021-06-22 stsp if (n != sizeof(*id))
847 c4330eff 2021-06-22 stsp return got_error(GOT_ERR_BAD_PACKFILE);
850 c4330eff 2021-06-22 stsp return NULL;
853 c3703302 2018-01-23 stsp static const struct got_error *
854 c8ecd499 2018-09-09 stsp resolve_ref_delta(struct got_delta_chain *deltas, struct got_packidx *packidx,
855 c8ecd499 2018-09-09 stsp struct got_pack *pack, off_t delta_offset, size_t tslen, int delta_type,
856 c8ecd499 2018-09-09 stsp size_t delta_size, unsigned int recursion)
858 6b9c9673 2018-01-23 stsp const struct got_error *err;
859 6b9c9673 2018-01-23 stsp struct got_object_id id;
861 6b9c9673 2018-01-23 stsp off_t base_offset;
862 6b9c9673 2018-01-23 stsp uint8_t base_type;
863 6b9c9673 2018-01-23 stsp uint64_t base_size;
864 6b9c9673 2018-01-23 stsp size_t base_tslen;
865 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
867 42c69117 2019-11-10 stsp if (delta_offset + tslen >= pack->filesize)
868 d7464085 2018-07-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
870 c4330eff 2021-06-22 stsp err = got_pack_parse_ref_delta(&id, pack, delta_offset, tslen);
872 c4330eff 2021-06-22 stsp return err;
873 d7464085 2018-07-09 stsp if (pack->map) {
874 c4330eff 2021-06-22 stsp delta_data_offset = delta_offset + tslen + sizeof(id);
876 e40b19ed 2020-01-06 stsp delta_data_offset = lseek(pack->fd, 0, SEEK_CUR);
877 e40b19ed 2020-01-06 stsp if (delta_data_offset == -1)
878 e40b19ed 2020-01-06 stsp return got_error_from_errno("lseek");
881 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type, delta_size,
882 42c69117 2019-11-10 stsp delta_data_offset);
884 1a35c1bc 2019-05-22 stsp return err;
886 652b2703 2018-06-22 stsp /* Delta base must be in the same pack file. */
887 1510f469 2018-09-09 stsp idx = got_packidx_get_object_idx(packidx, &id);
888 1a35c1bc 2019-05-22 stsp if (idx == -1)
889 668a20f6 2020-03-18 stsp return got_error(GOT_ERR_NO_OBJ);
891 02828bfd 2021-06-22 stsp base_offset = got_packidx_get_object_offset(packidx, idx);
892 1a35c1bc 2019-05-22 stsp if (base_offset == (uint64_t)-1)
893 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_BAD_PACKIDX);
895 1a35c1bc 2019-05-22 stsp if (base_offset >= pack->filesize)
896 1a35c1bc 2019-05-22 stsp return got_error(GOT_ERR_PACK_OFFSET);
898 668a20f6 2020-03-18 stsp err = got_pack_parse_object_type_and_size(&base_type, &base_size,
899 668a20f6 2020-03-18 stsp &base_tslen, pack, base_offset);
901 1a35c1bc 2019-05-22 stsp return err;
903 668a20f6 2020-03-18 stsp return got_pack_resolve_delta_chain(deltas, packidx, pack, base_offset,
904 0c048b15 2018-04-27 stsp base_tslen, base_type, base_size, recursion - 1);
907 668a20f6 2020-03-18 stsp const struct got_error *
908 668a20f6 2020-03-18 stsp got_pack_resolve_delta_chain(struct got_delta_chain *deltas,
909 668a20f6 2020-03-18 stsp struct got_packidx *packidx, struct got_pack *pack, off_t delta_offset,
910 668a20f6 2020-03-18 stsp size_t tslen, int delta_type, size_t delta_size, unsigned int recursion)
912 c3703302 2018-01-23 stsp const struct got_error *err = NULL;
914 5b7e13a7 2018-04-02 stsp if (--recursion == 0)
915 5b7e13a7 2018-04-02 stsp return got_error(GOT_ERR_RECURSION);
917 c3703302 2018-01-23 stsp switch (delta_type) {
918 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_COMMIT:
919 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TREE:
920 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_BLOB:
921 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TAG:
922 c3703302 2018-01-23 stsp /* Plain types are the final delta base. Recursion ends. */
923 c336f889 2018-07-23 stsp err = add_delta(deltas, delta_offset, tslen, delta_type,
924 42c69117 2019-11-10 stsp delta_size, 0);
926 a3500804 2018-01-23 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
927 c8ecd499 2018-09-09 stsp err = resolve_offset_delta(deltas, packidx, pack,
928 b0e2201a 2018-06-22 stsp delta_offset, tslen, delta_type, delta_size, recursion - 1);
930 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_REF_DELTA:
931 c8ecd499 2018-09-09 stsp err = resolve_ref_delta(deltas, packidx, pack,
932 b0e2201a 2018-06-22 stsp delta_offset, tslen, delta_type, delta_size, recursion - 1);
935 4810de4a 2018-04-01 stsp return got_error(GOT_ERR_OBJ_TYPE);
938 96f5e8b3 2018-01-23 stsp return err;
941 96f5e8b3 2018-01-23 stsp static const struct got_error *
942 a98c62b1 2018-09-09 stsp open_delta_object(struct got_object **obj, struct got_packidx *packidx,
943 a98c62b1 2018-09-09 stsp struct got_pack *pack, struct got_object_id *id, off_t offset,
944 c59b3346 2018-09-11 stsp size_t tslen, int delta_type, size_t delta_size, int idx)
946 96f5e8b3 2018-01-23 stsp const struct got_error *err = NULL;
947 96f5e8b3 2018-01-23 stsp int resolved_type;
949 b107e67f 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
950 b107e67f 2018-01-19 stsp if (*obj == NULL)
951 638f9024 2019-05-13 stsp return got_error_from_errno("calloc");
953 96f5e8b3 2018-01-23 stsp (*obj)->flags = 0;
954 b107e67f 2018-01-19 stsp (*obj)->hdrlen = 0;
955 39e73dc9 2018-03-03 stsp (*obj)->size = 0; /* Not known because deltas aren't applied yet. */
956 106807b4 2018-09-15 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
957 cecc778e 2018-01-23 stsp (*obj)->pack_offset = offset + tslen;
959 dbdddfee 2021-06-23 naddy STAILQ_INIT(&(*obj)->deltas.entries);
960 1a35c1bc 2019-05-22 stsp (*obj)->flags |= GOT_OBJ_FLAG_DELTIFIED;
961 96f5e8b3 2018-01-23 stsp (*obj)->flags |= GOT_OBJ_FLAG_PACKED;
962 c59b3346 2018-09-11 stsp (*obj)->pack_idx = idx;
964 668a20f6 2020-03-18 stsp err = got_pack_resolve_delta_chain(&(*obj)->deltas, packidx, pack,
965 668a20f6 2020-03-18 stsp offset, tslen, delta_type, delta_size,
966 668a20f6 2020-03-18 stsp GOT_DELTA_CHAIN_RECURSION_MAX);
970 96f5e8b3 2018-01-23 stsp err = got_delta_chain_get_base_type(&resolved_type, &(*obj)->deltas);
973 96f5e8b3 2018-01-23 stsp (*obj)->type = resolved_type;
976 96f5e8b3 2018-01-23 stsp got_object_close(*obj);
977 96f5e8b3 2018-01-23 stsp *obj = NULL;
979 96f5e8b3 2018-01-23 stsp return err;
982 2090a03d 2018-09-09 stsp const struct got_error *
983 2090a03d 2018-09-09 stsp got_packfile_open_object(struct got_object **obj, struct got_pack *pack,
984 6fd11751 2018-06-04 stsp struct got_packidx *packidx, int idx, struct got_object_id *id)
986 a1fd68d8 2018-01-12 stsp const struct got_error *err = NULL;
987 a1fd68d8 2018-01-12 stsp off_t offset;
988 6c00b545 2018-01-17 stsp uint8_t type;
989 6c00b545 2018-01-17 stsp uint64_t size;
990 3ee5fc21 2018-01-17 stsp size_t tslen;
992 6c00b545 2018-01-17 stsp *obj = NULL;
994 02828bfd 2021-06-22 stsp offset = got_packidx_get_object_offset(packidx, idx);
995 a1fd68d8 2018-01-12 stsp if (offset == (uint64_t)-1)
996 a1fd68d8 2018-01-12 stsp return got_error(GOT_ERR_BAD_PACKIDX);
998 668a20f6 2020-03-18 stsp err = got_pack_parse_object_type_and_size(&type, &size, &tslen,
999 668a20f6 2020-03-18 stsp pack, offset);
1001 35c73765 2018-09-09 stsp return err;
1003 6c00b545 2018-01-17 stsp switch (type) {
1004 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_COMMIT:
1005 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_TREE:
1006 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_BLOB:
1007 d33fc9ef 2018-01-23 stsp case GOT_OBJ_TYPE_TAG:
1008 5f25cc85 2019-11-26 stsp err = open_plain_object(obj, id, type, offset + tslen,
1009 5f25cc85 2019-11-26 stsp size, idx);
1011 b107e67f 2018-01-19 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
1012 a48db7e5 2018-01-23 stsp case GOT_OBJ_TYPE_REF_DELTA:
1013 a98c62b1 2018-09-09 stsp err = open_delta_object(obj, packidx, pack, id, offset,
1014 c59b3346 2018-09-11 stsp tslen, type, size, idx);
1017 4810de4a 2018-04-01 stsp err = got_error(GOT_ERR_OBJ_TYPE);
1021 3ee5fc21 2018-01-17 stsp return err;
1024 d582f26c 2020-03-18 stsp const struct got_error *
1025 d582f26c 2020-03-18 stsp got_pack_get_delta_chain_max_size(uint64_t *max_size, struct got_delta_chain *deltas,
1026 42c69117 2019-11-10 stsp struct got_pack *pack)
1028 22484865 2018-03-13 stsp struct got_delta *delta;
1029 22484865 2018-03-13 stsp uint64_t base_size = 0, result_size = 0;
1031 22484865 2018-03-13 stsp *max_size = 0;
1032 dbdddfee 2021-06-23 naddy STAILQ_FOREACH(delta, &deltas->entries, entry) {
1033 22484865 2018-03-13 stsp /* Plain object types are the delta base. */
1034 22484865 2018-03-13 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1035 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1036 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1037 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1038 22484865 2018-03-13 stsp const struct got_error *err;
1039 42c69117 2019-11-10 stsp uint8_t *delta_buf;
1040 42c69117 2019-11-10 stsp size_t delta_len;
1041 ab2f42e7 2019-11-10 stsp int cached = 1;
1043 ab2f42e7 2019-11-10 stsp got_delta_cache_get(&delta_buf, &delta_len,
1044 ab2f42e7 2019-11-10 stsp pack->delta_cache, delta->data_offset);
1045 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1046 ab2f42e7 2019-11-10 stsp cached = 0;
1047 ab2f42e7 2019-11-10 stsp err = read_delta_data(&delta_buf, &delta_len,
1048 ab2f42e7 2019-11-10 stsp delta->data_offset, pack);
1050 ab2f42e7 2019-11-10 stsp return err;
1051 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1052 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1053 ab2f42e7 2019-11-10 stsp if (err == NULL)
1054 ab2f42e7 2019-11-10 stsp cached = 1;
1055 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1056 ab2f42e7 2019-11-10 stsp free(delta_buf);
1057 ab2f42e7 2019-11-10 stsp return err;
1060 a53d2f13 2018-03-17 stsp err = got_delta_get_sizes(&base_size, &result_size,
1061 42c69117 2019-11-10 stsp delta_buf, delta_len);
1062 ab2f42e7 2019-11-10 stsp if (!cached)
1063 ab2f42e7 2019-11-10 stsp free(delta_buf);
1065 22484865 2018-03-13 stsp return err;
1067 22484865 2018-03-13 stsp base_size = delta->size;
1068 22484865 2018-03-13 stsp if (base_size > *max_size)
1069 22484865 2018-03-13 stsp *max_size = base_size;
1070 22484865 2018-03-13 stsp if (result_size > *max_size)
1071 22484865 2018-03-13 stsp *max_size = result_size;
1074 9feb4ff2 2018-03-14 stsp return NULL;
1077 ac544f8c 2019-01-13 stsp const struct got_error *
1078 42c69117 2019-11-10 stsp got_pack_get_max_delta_object_size(uint64_t *size, struct got_object *obj,
1079 42c69117 2019-11-10 stsp struct got_pack *pack)
1081 85a703fa 2019-01-13 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0)
1082 85a703fa 2019-01-13 stsp return got_error(GOT_ERR_OBJ_TYPE);
1084 d582f26c 2020-03-18 stsp return got_pack_get_delta_chain_max_size(size, &obj->deltas, pack);
1087 668a20f6 2020-03-18 stsp const struct got_error *
1088 4788f1ce 2020-03-18 stsp got_pack_dump_delta_chain_to_file(size_t *result_size,
1089 4788f1ce 2020-03-18 stsp struct got_delta_chain *deltas, struct got_pack *pack, FILE *outfile,
1090 4788f1ce 2020-03-18 stsp FILE *base_file, FILE *accum_file)
1092 efd2a263 2018-01-19 stsp const struct got_error *err = NULL;
1093 6691714a 2018-01-23 stsp struct got_delta *delta;
1094 42c69117 2019-11-10 stsp uint8_t *base_buf = NULL, *accum_buf = NULL, *delta_buf;
1095 42c69117 2019-11-10 stsp size_t base_bufsz = 0, accum_size = 0, delta_len;
1096 22484865 2018-03-13 stsp uint64_t max_size;
1097 6691714a 2018-01-23 stsp int n = 0;
1099 b29656e2 2018-03-16 stsp *result_size = 0;
1101 dbdddfee 2021-06-23 naddy if (STAILQ_EMPTY(&deltas->entries))
1102 6691714a 2018-01-23 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
1104 8628c62d 2018-03-15 stsp /* We process small enough files entirely in memory for speed. */
1105 d582f26c 2020-03-18 stsp err = got_pack_get_delta_chain_max_size(&max_size, deltas, pack);
1107 22484865 2018-03-13 stsp return err;
1108 8628c62d 2018-03-15 stsp if (max_size < GOT_DELTA_RESULT_SIZE_CACHED_MAX) {
1109 8628c62d 2018-03-15 stsp accum_buf = malloc(max_size);
1110 8628c62d 2018-03-15 stsp if (accum_buf == NULL)
1111 638f9024 2019-05-13 stsp return got_error_from_errno("malloc");
1112 3840f4c9 2018-09-12 stsp base_file = NULL;
1113 3840f4c9 2018-09-12 stsp accum_file = NULL;
1116 6691714a 2018-01-23 stsp /* Deltas are ordered in ascending order. */
1117 dbdddfee 2021-06-23 naddy STAILQ_FOREACH(delta, &deltas->entries, entry) {
1118 ab2f42e7 2019-11-10 stsp int cached = 1;
1119 a6b158cc 2018-02-11 stsp if (n == 0) {
1120 34fca9c3 2018-11-11 stsp size_t mapoff;
1121 0c048b15 2018-04-27 stsp off_t delta_data_offset;
1123 a6b158cc 2018-02-11 stsp /* Plain object types are the delta base. */
1124 a6b158cc 2018-02-11 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1125 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1126 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1127 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1128 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1129 72eb3431 2018-04-01 stsp goto done;
1132 0c048b15 2018-04-27 stsp delta_data_offset = delta->offset + delta->tslen;
1133 0c048b15 2018-04-27 stsp if (delta_data_offset >= pack->filesize) {
1134 0c048b15 2018-04-27 stsp err = got_error(GOT_ERR_PACK_OFFSET);
1135 0c048b15 2018-04-27 stsp goto done;
1137 d7464085 2018-07-09 stsp if (pack->map == NULL) {
1138 d7464085 2018-07-09 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET)
1140 638f9024 2019-05-13 stsp err = got_error_from_errno("lseek");
1141 d7464085 2018-07-09 stsp goto done;
1144 d7464085 2018-07-09 stsp if (base_file) {
1145 d7464085 2018-07-09 stsp if (pack->map) {
1146 d7464085 2018-07-09 stsp mapoff = (size_t)delta_data_offset;
1147 d7464085 2018-07-09 stsp err = got_inflate_to_file_mmap(
1148 4788f1ce 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->map,
1149 4788f1ce 2020-03-18 stsp mapoff, pack->filesize - mapoff,
1150 4788f1ce 2020-03-18 stsp base_file);
1152 34fca9c3 2018-11-11 stsp err = got_inflate_to_file_fd(
1153 4788f1ce 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->fd,
1154 4788f1ce 2020-03-18 stsp base_file);
1156 d7464085 2018-07-09 stsp if (pack->map) {
1157 d7464085 2018-07-09 stsp mapoff = (size_t)delta_data_offset;
1158 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&base_buf,
1159 2e5a6fad 2020-03-18 stsp &base_bufsz, NULL, NULL,
1160 2e5a6fad 2020-03-18 stsp pack->map, mapoff,
1161 d7464085 2018-07-09 stsp pack->filesize - mapoff);
1163 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&base_buf,
1164 55fdd257 2020-03-18 stsp &base_bufsz, NULL, NULL, max_size,
1165 55fdd257 2020-03-18 stsp pack->fd);
1168 a6b158cc 2018-02-11 stsp goto done;
1170 8628c62d 2018-03-15 stsp if (base_file)
1171 8628c62d 2018-03-15 stsp rewind(base_file);
1175 ab2f42e7 2019-11-10 stsp got_delta_cache_get(&delta_buf, &delta_len,
1176 ab2f42e7 2019-11-10 stsp pack->delta_cache, delta->data_offset);
1177 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1178 ab2f42e7 2019-11-10 stsp cached = 0;
1179 ab2f42e7 2019-11-10 stsp err = read_delta_data(&delta_buf, &delta_len,
1180 ab2f42e7 2019-11-10 stsp delta->data_offset, pack);
1182 ab2f42e7 2019-11-10 stsp goto done;
1183 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1184 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1185 ab2f42e7 2019-11-10 stsp if (err == NULL)
1186 ab2f42e7 2019-11-10 stsp cached = 1;
1187 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1188 ab2f42e7 2019-11-10 stsp free(delta_buf);
1189 ab2f42e7 2019-11-10 stsp goto done;
1192 8628c62d 2018-03-15 stsp if (base_buf) {
1193 34fca9c3 2018-11-11 stsp err = got_delta_apply_in_mem(base_buf, base_bufsz,
1194 42c69117 2019-11-10 stsp delta_buf, delta_len, accum_buf,
1195 34fca9c3 2018-11-11 stsp &accum_size, max_size);
1198 42c69117 2019-11-10 stsp err = got_delta_apply(base_file, delta_buf,
1199 42c69117 2019-11-10 stsp delta_len,
1200 8628c62d 2018-03-15 stsp /* Final delta application writes to output file. */
1201 b29656e2 2018-03-16 stsp ++n < deltas->nentries ? accum_file : outfile,
1202 b29656e2 2018-03-16 stsp &accum_size);
1204 ab2f42e7 2019-11-10 stsp if (!cached)
1205 ab2f42e7 2019-11-10 stsp free(delta_buf);
1207 6691714a 2018-01-23 stsp goto done;
1209 710bb5ca 2018-01-23 stsp if (n < deltas->nentries) {
1210 6691714a 2018-01-23 stsp /* Accumulated delta becomes the new base. */
1211 8628c62d 2018-03-15 stsp if (base_buf) {
1212 8628c62d 2018-03-15 stsp uint8_t *tmp = accum_buf;
1214 34fca9c3 2018-11-11 stsp * Base buffer switches roles with accumulation
1215 34fca9c3 2018-11-11 stsp * buffer. Ensure it can hold the largest
1216 34fca9c3 2018-11-11 stsp * result in the delta chain. The initial
1217 34fca9c3 2018-11-11 stsp * allocation might have been smaller.
1219 34fca9c3 2018-11-11 stsp if (base_bufsz < max_size) {
1220 34fca9c3 2018-11-11 stsp uint8_t *p;
1221 34fca9c3 2018-11-11 stsp p = reallocarray(base_buf, 1, max_size);
1222 34fca9c3 2018-11-11 stsp if (p == NULL) {
1223 638f9024 2019-05-13 stsp err = got_error_from_errno(
1224 230a42bd 2019-05-11 jcs "reallocarray");
1225 34fca9c3 2018-11-11 stsp goto done;
1227 34fca9c3 2018-11-11 stsp base_buf = p;
1228 34fca9c3 2018-11-11 stsp base_bufsz = max_size;
1230 8628c62d 2018-03-15 stsp accum_buf = base_buf;
1231 8628c62d 2018-03-15 stsp base_buf = tmp;
1233 8628c62d 2018-03-15 stsp FILE *tmp = accum_file;
1234 8628c62d 2018-03-15 stsp accum_file = base_file;
1235 8628c62d 2018-03-15 stsp base_file = tmp;
1236 8628c62d 2018-03-15 stsp rewind(base_file);
1237 8628c62d 2018-03-15 stsp rewind(accum_file);
1243 8628c62d 2018-03-15 stsp free(base_buf);
1244 8628c62d 2018-03-15 stsp if (accum_buf) {
1245 8628c62d 2018-03-15 stsp size_t len = fwrite(accum_buf, 1, accum_size, outfile);
1246 8628c62d 2018-03-15 stsp free(accum_buf);
1247 8628c62d 2018-03-15 stsp if (len != accum_size)
1248 673702af 2018-07-23 stsp err = got_ferror(outfile, GOT_ERR_IO);
1250 6691714a 2018-01-23 stsp rewind(outfile);
1251 b29656e2 2018-03-16 stsp if (err == NULL)
1252 b29656e2 2018-03-16 stsp *result_size = accum_size;
1253 e0ab43e7 2018-03-16 stsp return err;
1256 668a20f6 2020-03-18 stsp const struct got_error *
1257 668a20f6 2020-03-18 stsp got_pack_dump_delta_chain_to_mem(uint8_t **outbuf, size_t *outlen,
1258 48095039 2018-09-09 stsp struct got_delta_chain *deltas, struct got_pack *pack)
1260 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1261 e0ab43e7 2018-03-16 stsp struct got_delta *delta;
1262 42c69117 2019-11-10 stsp uint8_t *base_buf = NULL, *accum_buf = NULL, *delta_buf;
1263 42c69117 2019-11-10 stsp size_t base_bufsz = 0, accum_size = 0, delta_len;
1264 e0ab43e7 2018-03-16 stsp uint64_t max_size;
1265 e0ab43e7 2018-03-16 stsp int n = 0;
1267 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1268 e0ab43e7 2018-03-16 stsp *outlen = 0;
1270 dbdddfee 2021-06-23 naddy if (STAILQ_EMPTY(&deltas->entries))
1271 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
1273 d582f26c 2020-03-18 stsp err = got_pack_get_delta_chain_max_size(&max_size, deltas, pack);
1275 e0ab43e7 2018-03-16 stsp return err;
1276 e0ab43e7 2018-03-16 stsp accum_buf = malloc(max_size);
1277 e0ab43e7 2018-03-16 stsp if (accum_buf == NULL)
1278 638f9024 2019-05-13 stsp return got_error_from_errno("malloc");
1280 e0ab43e7 2018-03-16 stsp /* Deltas are ordered in ascending order. */
1281 dbdddfee 2021-06-23 naddy STAILQ_FOREACH(delta, &deltas->entries, entry) {
1282 ab2f42e7 2019-11-10 stsp int cached = 1;
1283 e0ab43e7 2018-03-16 stsp if (n == 0) {
1284 0c048b15 2018-04-27 stsp size_t delta_data_offset;
1286 e0ab43e7 2018-03-16 stsp /* Plain object types are the delta base. */
1287 e0ab43e7 2018-03-16 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1288 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1289 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1290 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1291 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1292 72eb3431 2018-04-01 stsp goto done;
1295 0c048b15 2018-04-27 stsp delta_data_offset = delta->offset + delta->tslen;
1296 0c048b15 2018-04-27 stsp if (delta_data_offset >= pack->filesize) {
1297 0c048b15 2018-04-27 stsp err = got_error(GOT_ERR_PACK_OFFSET);
1298 0c048b15 2018-04-27 stsp goto done;
1300 d7464085 2018-07-09 stsp if (pack->map) {
1301 d7464085 2018-07-09 stsp size_t mapoff = (size_t)delta_data_offset;
1302 d7464085 2018-07-09 stsp err = got_inflate_to_mem_mmap(&base_buf,
1303 2e5a6fad 2020-03-18 stsp &base_bufsz, NULL, NULL, pack->map,
1304 2e5a6fad 2020-03-18 stsp mapoff, pack->filesize - mapoff);
1306 d7464085 2018-07-09 stsp if (lseek(pack->fd, delta_data_offset, SEEK_SET)
1308 638f9024 2019-05-13 stsp err = got_error_from_errno("lseek");
1309 d7464085 2018-07-09 stsp goto done;
1311 d7464085 2018-07-09 stsp err = got_inflate_to_mem_fd(&base_buf,
1312 55fdd257 2020-03-18 stsp &base_bufsz, NULL, NULL, max_size,
1313 55fdd257 2020-03-18 stsp pack->fd);
1316 d7464085 2018-07-09 stsp goto done;
1321 ab2f42e7 2019-11-10 stsp got_delta_cache_get(&delta_buf, &delta_len,
1322 ab2f42e7 2019-11-10 stsp pack->delta_cache, delta->data_offset);
1323 ab2f42e7 2019-11-10 stsp if (delta_buf == NULL) {
1324 ab2f42e7 2019-11-10 stsp cached = 0;
1325 ab2f42e7 2019-11-10 stsp err = read_delta_data(&delta_buf, &delta_len,
1326 ab2f42e7 2019-11-10 stsp delta->data_offset, pack);
1328 ab2f42e7 2019-11-10 stsp goto done;
1329 ab2f42e7 2019-11-10 stsp err = got_delta_cache_add(pack->delta_cache,
1330 ab2f42e7 2019-11-10 stsp delta->data_offset, delta_buf, delta_len);
1331 ab2f42e7 2019-11-10 stsp if (err == NULL)
1332 ab2f42e7 2019-11-10 stsp cached = 1;
1333 ab2f42e7 2019-11-10 stsp else if (err->code != GOT_ERR_NO_SPACE) {
1334 ab2f42e7 2019-11-10 stsp free(delta_buf);
1335 ab2f42e7 2019-11-10 stsp goto done;
1338 34fca9c3 2018-11-11 stsp err = got_delta_apply_in_mem(base_buf, base_bufsz,
1339 42c69117 2019-11-10 stsp delta_buf, delta_len, accum_buf,
1340 34fca9c3 2018-11-11 stsp &accum_size, max_size);
1341 ab2f42e7 2019-11-10 stsp if (!cached)
1342 ab2f42e7 2019-11-10 stsp free(delta_buf);
1345 e0ab43e7 2018-03-16 stsp goto done;
1347 e0ab43e7 2018-03-16 stsp if (n < deltas->nentries) {
1348 e0ab43e7 2018-03-16 stsp /* Accumulated delta becomes the new base. */
1349 e0ab43e7 2018-03-16 stsp uint8_t *tmp = accum_buf;
1351 34fca9c3 2018-11-11 stsp * Base buffer switches roles with accumulation buffer.
1352 34fca9c3 2018-11-11 stsp * Ensure it can hold the largest result in the delta
1353 34fca9c3 2018-11-11 stsp * chain. Initial allocation might have been smaller.
1355 34fca9c3 2018-11-11 stsp if (base_bufsz < max_size) {
1356 34fca9c3 2018-11-11 stsp uint8_t *p;
1357 34fca9c3 2018-11-11 stsp p = reallocarray(base_buf, 1, max_size);
1358 34fca9c3 2018-11-11 stsp if (p == NULL) {
1359 638f9024 2019-05-13 stsp err = got_error_from_errno(
1360 230a42bd 2019-05-11 jcs "reallocarray");
1361 34fca9c3 2018-11-11 stsp goto done;
1363 34fca9c3 2018-11-11 stsp base_buf = p;
1364 34fca9c3 2018-11-11 stsp base_bufsz = max_size;
1366 e0ab43e7 2018-03-16 stsp accum_buf = base_buf;
1367 e0ab43e7 2018-03-16 stsp base_buf = tmp;
1372 e0ab43e7 2018-03-16 stsp free(base_buf);
1373 e0ab43e7 2018-03-16 stsp if (err) {
1374 e0ab43e7 2018-03-16 stsp free(accum_buf);
1375 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1376 e0ab43e7 2018-03-16 stsp *outlen = 0;
1378 e0ab43e7 2018-03-16 stsp *outbuf = accum_buf;
1379 e0ab43e7 2018-03-16 stsp *outlen = accum_size;
1381 efd2a263 2018-01-19 stsp return err;
1384 3ee5fc21 2018-01-17 stsp const struct got_error *
1385 24140570 2018-09-09 stsp got_packfile_extract_object(struct got_pack *pack, struct got_object *obj,
1386 3840f4c9 2018-09-12 stsp FILE *outfile, FILE *base_file, FILE *accum_file)
1388 3ee5fc21 2018-01-17 stsp const struct got_error *err = NULL;
1390 3ee5fc21 2018-01-17 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1391 3ee5fc21 2018-01-17 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1393 ef2bccd9 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1394 24140570 2018-09-09 stsp if (obj->pack_offset >= pack->filesize)
1395 24140570 2018-09-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1397 d7464085 2018-07-09 stsp if (pack->map) {
1398 d7464085 2018-07-09 stsp size_t mapoff = (size_t)obj->pack_offset;
1399 4788f1ce 2020-03-18 stsp err = got_inflate_to_file_mmap(&obj->size, NULL, NULL,
1400 4788f1ce 2020-03-18 stsp pack->map, mapoff, pack->filesize - mapoff,
1403 24140570 2018-09-09 stsp if (lseek(pack->fd, obj->pack_offset, SEEK_SET) == -1)
1404 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
1405 4788f1ce 2020-03-18 stsp err = got_inflate_to_file_fd(&obj->size, NULL, NULL,
1406 4788f1ce 2020-03-18 stsp pack->fd, outfile);
1409 4788f1ce 2020-03-18 stsp err = got_pack_dump_delta_chain_to_file(&obj->size,
1410 4788f1ce 2020-03-18 stsp &obj->deltas, pack, outfile, base_file, accum_file);
1412 a1fd68d8 2018-01-12 stsp return err;
1415 e0ab43e7 2018-03-16 stsp const struct got_error *
1416 e0ab43e7 2018-03-16 stsp got_packfile_extract_object_to_mem(uint8_t **buf, size_t *len,
1417 7e212e3d 2018-09-09 stsp struct got_object *obj, struct got_pack *pack)
1419 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1421 e0ab43e7 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1422 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1424 48095039 2018-09-09 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1425 7e212e3d 2018-09-09 stsp if (obj->pack_offset >= pack->filesize)
1426 7e212e3d 2018-09-09 stsp return got_error(GOT_ERR_PACK_OFFSET);
1427 d7464085 2018-07-09 stsp if (pack->map) {
1428 d7464085 2018-07-09 stsp size_t mapoff = (size_t)obj->pack_offset;
1429 2e5a6fad 2020-03-18 stsp err = got_inflate_to_mem_mmap(buf, len, NULL, NULL,
1430 2e5a6fad 2020-03-18 stsp pack->map, mapoff, pack->filesize - mapoff);
1432 7e212e3d 2018-09-09 stsp if (lseek(pack->fd, obj->pack_offset, SEEK_SET) == -1)
1433 638f9024 2019-05-13 stsp return got_error_from_errno("lseek");
1434 1e87a3c3 2020-03-18 stsp err = got_inflate_to_mem_fd(buf, len, NULL, NULL,
1435 55fdd257 2020-03-18 stsp obj->size, pack->fd);
1438 668a20f6 2020-03-18 stsp err = got_pack_dump_delta_chain_to_mem(buf, len, &obj->deltas,
1441 e0ab43e7 2018-03-16 stsp return err;