2 0a0a3048 2018-01-10 stsp * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
4 0a0a3048 2018-01-10 stsp * Permission to use, copy, modify, and distribute this software for any
5 0a0a3048 2018-01-10 stsp * purpose with or without fee is hereby granted, provided that the above
6 0a0a3048 2018-01-10 stsp * copyright notice and this permission notice appear in all copies.
8 0a0a3048 2018-01-10 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 0a0a3048 2018-01-10 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 0a0a3048 2018-01-10 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 0a0a3048 2018-01-10 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 0a0a3048 2018-01-10 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 0a0a3048 2018-01-10 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 0a0a3048 2018-01-10 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 a1fd68d8 2018-01-12 stsp #include <sys/types.h>
18 0a0a3048 2018-01-10 stsp #include <sys/stat.h>
19 a1fd68d8 2018-01-12 stsp #include <sys/queue.h>
21 a1fd68d8 2018-01-12 stsp #include <dirent.h>
22 7e656b93 2018-03-17 stsp #include <fcntl.h>
23 a1fd68d8 2018-01-12 stsp #include <errno.h>
24 0a0a3048 2018-01-10 stsp #include <stdio.h>
25 a1fd68d8 2018-01-12 stsp #include <stdint.h>
26 0a0a3048 2018-01-10 stsp #include <stdlib.h>
27 0a0a3048 2018-01-10 stsp #include <string.h>
28 0a0a3048 2018-01-10 stsp #include <limits.h>
29 0a0a3048 2018-01-10 stsp #include <sha1.h>
30 0a0a3048 2018-01-10 stsp #include <endian.h>
31 a1fd68d8 2018-01-12 stsp #include <zlib.h>
33 0a0a3048 2018-01-10 stsp #include "got_error.h"
34 a1fd68d8 2018-01-12 stsp #include "got_object.h"
35 a1fd68d8 2018-01-12 stsp #include "got_repository.h"
37 718b3ab0 2018-03-17 stsp #include "got_lib_sha1.h"
38 718b3ab0 2018-03-17 stsp #include "got_lib_pack.h"
39 718b3ab0 2018-03-17 stsp #include "got_lib_path.h"
40 718b3ab0 2018-03-17 stsp #include "got_lib_delta.h"
41 718b3ab0 2018-03-17 stsp #include "got_lib_zbuf.h"
42 718b3ab0 2018-03-17 stsp #include "got_lib_object.h"
43 718b3ab0 2018-03-17 stsp #include "got_lib_repository.h"
45 79b11c62 2018-03-09 stsp #ifndef nitems
46 79b11c62 2018-03-09 stsp #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
49 a1fd68d8 2018-01-12 stsp #define GOT_PACK_PREFIX "pack-"
50 a1fd68d8 2018-01-12 stsp #define GOT_PACKFILE_SUFFIX ".pack"
51 a1fd68d8 2018-01-12 stsp #define GOT_PACKIDX_SUFFIX ".idx"
52 a1fd68d8 2018-01-12 stsp #define GOT_PACKFILE_NAMELEN (strlen(GOT_PACK_PREFIX) + \
53 a1fd68d8 2018-01-12 stsp SHA1_DIGEST_STRING_LENGTH - 1 + \
54 a1fd68d8 2018-01-12 stsp strlen(GOT_PACKFILE_SUFFIX))
55 a1fd68d8 2018-01-12 stsp #define GOT_PACKIDX_NAMELEN (strlen(GOT_PACK_PREFIX) + \
56 a1fd68d8 2018-01-12 stsp SHA1_DIGEST_STRING_LENGTH - 1 + \
57 a1fd68d8 2018-01-12 stsp strlen(GOT_PACKIDX_SUFFIX))
60 a1fd68d8 2018-01-12 stsp #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
63 0a0a3048 2018-01-10 stsp static const struct got_error *
64 0a0a3048 2018-01-10 stsp verify_fanout_table(uint32_t *fanout_table)
68 0a0a3048 2018-01-10 stsp for (i = 0; i < 0xff - 1; i++) {
69 a1fd68d8 2018-01-12 stsp if (be32toh(fanout_table[i]) > be32toh(fanout_table[i + 1]))
70 0a0a3048 2018-01-10 stsp return got_error(GOT_ERR_BAD_PACKIDX);
73 0a0a3048 2018-01-10 stsp return NULL;
76 24541888 2018-01-10 stsp static const struct got_error *
77 1c7e24f1 2018-04-02 stsp get_packfile_size(size_t *size, const char *path)
79 0a0a3048 2018-01-10 stsp struct stat sb;
84 1c7e24f1 2018-04-02 stsp dot = strrchr(path, '.');
85 0a0a3048 2018-01-10 stsp if (dot == NULL)
86 0a0a3048 2018-01-10 stsp return got_error(GOT_ERR_BAD_PATH);
88 1c7e24f1 2018-04-02 stsp /* Path must point to a pack index or to a pack file. */
89 1c7e24f1 2018-04-02 stsp if (strcmp(dot, ".idx") == 0) {
90 97128b57 2018-04-02 stsp const struct got_error *err = NULL;
91 1c7e24f1 2018-04-02 stsp char *path_pack;
92 1c7e24f1 2018-04-02 stsp char base_path[PATH_MAX];
94 1c7e24f1 2018-04-02 stsp /* Convert pack index path to pack file path. */
95 1c7e24f1 2018-04-02 stsp if (strlcpy(base_path, path, PATH_MAX) > PATH_MAX)
96 1c7e24f1 2018-04-02 stsp return got_error(GOT_ERR_NO_SPACE);
97 1c7e24f1 2018-04-02 stsp dot = strrchr(base_path, '.');
98 1c7e24f1 2018-04-02 stsp if (dot == NULL)
99 1c7e24f1 2018-04-02 stsp return got_error(GOT_ERR_BAD_PATH);
100 1c7e24f1 2018-04-02 stsp *dot = '\0';
101 1c7e24f1 2018-04-02 stsp if (asprintf(&path_pack, "%s.pack", base_path) == -1)
102 1c7e24f1 2018-04-02 stsp return got_error_from_errno();
104 97128b57 2018-04-02 stsp if (stat(path_pack, &sb) != 0)
105 97128b57 2018-04-02 stsp err = got_error_from_errno();
106 0a0a3048 2018-01-10 stsp free(path_pack);
108 97128b57 2018-04-02 stsp return err;
109 1c7e24f1 2018-04-02 stsp } else if (strcmp(dot, ".pack") == 0) {
110 1c7e24f1 2018-04-02 stsp if (stat(path, &sb) != 0)
111 1c7e24f1 2018-04-02 stsp return got_error_from_errno();
113 1c7e24f1 2018-04-02 stsp return got_error(GOT_ERR_BAD_PATH);
115 0a0a3048 2018-01-10 stsp *size = sb.st_size;
119 0a0a3048 2018-01-10 stsp const struct got_error *
120 0a0a3048 2018-01-10 stsp got_packidx_open(struct got_packidx_v2_hdr **packidx, const char *path)
122 0a0a3048 2018-01-10 stsp struct got_packidx_v2_hdr *p;
124 0a0a3048 2018-01-10 stsp const struct got_error *err = NULL;
125 0a0a3048 2018-01-10 stsp size_t n, nobj, packfile_size;
126 0ebaf008 2018-01-10 stsp SHA1_CTX ctx;
127 0ebaf008 2018-01-10 stsp uint8_t sha1[SHA1_DIGEST_LENGTH];
129 0ebaf008 2018-01-10 stsp SHA1Init(&ctx);
131 0a0a3048 2018-01-10 stsp f = fopen(path, "rb");
132 0a0a3048 2018-01-10 stsp if (f == NULL)
133 9feb4ff2 2018-03-14 stsp return got_error_from_errno();
135 0a0a3048 2018-01-10 stsp err = get_packfile_size(&packfile_size, path);
137 0a0a3048 2018-01-10 stsp return err;
139 0a0a3048 2018-01-10 stsp p = calloc(1, sizeof(*p));
140 0a0a3048 2018-01-10 stsp if (p == NULL) {
141 0a585a0d 2018-03-17 stsp err = got_error_from_errno();
145 0a0a3048 2018-01-10 stsp n = fread(&p->magic, sizeof(p->magic), 1, f);
146 0a0a3048 2018-01-10 stsp if (n != 1) {
147 8251fdbc 2018-01-12 stsp err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
151 0a0a3048 2018-01-10 stsp if (betoh32(p->magic) != GOT_PACKIDX_V2_MAGIC) {
152 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
156 0ebaf008 2018-01-10 stsp SHA1Update(&ctx, (uint8_t *)&p->magic, sizeof(p->magic));
158 0a0a3048 2018-01-10 stsp n = fread(&p->version, sizeof(p->version), 1, f);
159 0a0a3048 2018-01-10 stsp if (n != 1) {
160 8251fdbc 2018-01-12 stsp err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
164 0a0a3048 2018-01-10 stsp if (betoh32(p->version) != GOT_PACKIDX_VERSION) {
165 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
169 0ebaf008 2018-01-10 stsp SHA1Update(&ctx, (uint8_t *)&p->version, sizeof(p->version));
171 0a0a3048 2018-01-10 stsp n = fread(&p->fanout_table, sizeof(p->fanout_table), 1, f);
172 0a0a3048 2018-01-10 stsp if (n != 1) {
173 8251fdbc 2018-01-12 stsp err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
177 0a0a3048 2018-01-10 stsp err = verify_fanout_table(p->fanout_table);
181 0ebaf008 2018-01-10 stsp SHA1Update(&ctx, (uint8_t *)p->fanout_table, sizeof(p->fanout_table));
183 0a0a3048 2018-01-10 stsp nobj = betoh32(p->fanout_table[0xff]);
185 0a0a3048 2018-01-10 stsp p->sorted_ids = calloc(nobj, sizeof(*p->sorted_ids));
186 0a0a3048 2018-01-10 stsp if (p->sorted_ids == NULL) {
187 0a585a0d 2018-03-17 stsp err = got_error_from_errno();
191 0a0a3048 2018-01-10 stsp n = fread(p->sorted_ids, sizeof(*p->sorted_ids), nobj, f);
192 0a0a3048 2018-01-10 stsp if (n != nobj) {
193 8251fdbc 2018-01-12 stsp err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
197 0ebaf008 2018-01-10 stsp SHA1Update(&ctx, (uint8_t *)p->sorted_ids,
198 0ebaf008 2018-01-10 stsp nobj * sizeof(*p->sorted_ids));
200 a1fd68d8 2018-01-12 stsp p->crc32 = calloc(nobj, sizeof(*p->crc32));
201 a1fd68d8 2018-01-12 stsp if (p->crc32 == NULL) {
202 0a585a0d 2018-03-17 stsp err = got_error_from_errno();
206 a1fd68d8 2018-01-12 stsp n = fread(p->crc32, sizeof(*p->crc32), nobj, f);
207 0a0a3048 2018-01-10 stsp if (n != nobj) {
208 8251fdbc 2018-01-12 stsp err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
212 a1fd68d8 2018-01-12 stsp SHA1Update(&ctx, (uint8_t *)p->crc32, nobj * sizeof(*p->crc32));
214 a1fd68d8 2018-01-12 stsp p->offsets = calloc(nobj, sizeof(*p->offsets));
215 a1fd68d8 2018-01-12 stsp if (p->offsets == NULL) {
216 0a585a0d 2018-03-17 stsp err = got_error_from_errno();
220 a1fd68d8 2018-01-12 stsp n = fread(p->offsets, sizeof(*p->offsets), nobj, f);
221 0a0a3048 2018-01-10 stsp if (n != nobj) {
222 8251fdbc 2018-01-12 stsp err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
226 a1fd68d8 2018-01-12 stsp SHA1Update(&ctx, (uint8_t *)p->offsets, nobj * sizeof(*p->offsets));
228 0a0a3048 2018-01-10 stsp /* Large file offsets are contained only in files > 2GB. */
229 b0517dd0 2018-01-10 stsp if (packfile_size <= 0x80000000)
230 0a0a3048 2018-01-10 stsp goto checksum;
232 0a0a3048 2018-01-10 stsp p->large_offsets = calloc(nobj, sizeof(*p->large_offsets));
233 0a0a3048 2018-01-10 stsp if (p->large_offsets == NULL) {
234 0a585a0d 2018-03-17 stsp err = got_error_from_errno();
238 0a0a3048 2018-01-10 stsp n = fread(p->large_offsets, sizeof(*p->large_offsets), nobj, f);
239 0a0a3048 2018-01-10 stsp if (n != nobj) {
240 8251fdbc 2018-01-12 stsp err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
244 0ebaf008 2018-01-10 stsp SHA1Update(&ctx, (uint8_t*)p->large_offsets,
245 0ebaf008 2018-01-10 stsp nobj * sizeof(*p->large_offsets));
248 0a0a3048 2018-01-10 stsp n = fread(&p->trailer, sizeof(p->trailer), 1, f);
249 0a0a3048 2018-01-10 stsp if (n != 1) {
250 8251fdbc 2018-01-12 stsp err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
254 a1fd68d8 2018-01-12 stsp SHA1Update(&ctx, p->trailer.packfile_sha1, SHA1_DIGEST_LENGTH);
255 0ebaf008 2018-01-10 stsp SHA1Final(sha1, &ctx);
256 a1fd68d8 2018-01-12 stsp if (memcmp(p->trailer.packidx_sha1, sha1, SHA1_DIGEST_LENGTH) != 0)
257 0ebaf008 2018-01-10 stsp err = got_error(GOT_ERR_PACKIDX_CSUM);
261 0a0a3048 2018-01-10 stsp got_packidx_close(p);
263 0a0a3048 2018-01-10 stsp *packidx = p;
264 0a0a3048 2018-01-10 stsp return err;
268 0a0a3048 2018-01-10 stsp got_packidx_close(struct got_packidx_v2_hdr *packidx)
270 0a0a3048 2018-01-10 stsp free(packidx->sorted_ids);
271 0a0a3048 2018-01-10 stsp free(packidx->offsets);
272 0a0a3048 2018-01-10 stsp free(packidx->crc32);
273 0a0a3048 2018-01-10 stsp free(packidx->large_offsets);
274 0a0a3048 2018-01-10 stsp free(packidx);
278 a1fd68d8 2018-01-12 stsp is_packidx_filename(const char *name, size_t len)
280 a1fd68d8 2018-01-12 stsp if (len != GOT_PACKIDX_NAMELEN)
283 a1fd68d8 2018-01-12 stsp if (strncmp(name, GOT_PACK_PREFIX, strlen(GOT_PACK_PREFIX)) != 0)
286 a1fd68d8 2018-01-12 stsp if (strcmp(name + strlen(GOT_PACK_PREFIX) +
287 a1fd68d8 2018-01-12 stsp SHA1_DIGEST_STRING_LENGTH - 1, GOT_PACKIDX_SUFFIX) != 0)
293 a1fd68d8 2018-01-12 stsp static off_t
294 a1fd68d8 2018-01-12 stsp get_object_offset(struct got_packidx_v2_hdr *packidx, int idx)
296 a1fd68d8 2018-01-12 stsp uint32_t totobj = betoh32(packidx->fanout_table[0xff]);
297 a1fd68d8 2018-01-12 stsp uint32_t offset = betoh32(packidx->offsets[idx]);
298 a1fd68d8 2018-01-12 stsp if (offset & GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX) {
299 a1fd68d8 2018-01-12 stsp uint64_t loffset;
300 a1fd68d8 2018-01-12 stsp idx = offset & GOT_PACKIDX_OFFSET_VAL_MASK;
301 a1fd68d8 2018-01-12 stsp if (idx < 0 || idx > totobj || packidx->large_offsets == NULL)
303 a1fd68d8 2018-01-12 stsp loffset = betoh64(packidx->large_offsets[idx]);
304 a1fd68d8 2018-01-12 stsp return (loffset > INT64_MAX ? -1 : (off_t)loffset);
306 a1fd68d8 2018-01-12 stsp return (off_t)(offset & GOT_PACKIDX_OFFSET_VAL_MASK);
309 72eb3431 2018-04-01 stsp static const struct got_error *
310 72eb3431 2018-04-01 stsp get_packfile_path(char **path_packfile, struct got_repository *repo,
311 72eb3431 2018-04-01 stsp struct got_packidx_v2_hdr *packidx);
314 72eb3431 2018-04-01 stsp get_object_idx(struct got_packidx_v2_hdr *packidx, struct got_object_id *id, struct got_repository *repo)
316 a1fd68d8 2018-01-12 stsp u_int8_t id0 = id->sha1[0];
317 a1fd68d8 2018-01-12 stsp uint32_t totobj = betoh32(packidx->fanout_table[0xff]);
320 a1fd68d8 2018-01-12 stsp if (id0 > 0)
321 a1fd68d8 2018-01-12 stsp i = betoh32(packidx->fanout_table[id0 - 1]);
323 a1fd68d8 2018-01-12 stsp while (i < totobj) {
324 6c00b545 2018-01-17 stsp struct got_object_id *oid = &packidx->sorted_ids[i];
325 2b2ca9f0 2018-01-13 stsp int cmp = got_object_id_cmp(id, oid);
327 16dcbf91 2018-04-01 stsp if (cmp == 0)
335 79b11c62 2018-03-09 stsp static struct got_packidx_v2_hdr *
336 79b11c62 2018-03-09 stsp dup_packidx(struct got_packidx_v2_hdr *packidx)
338 79b11c62 2018-03-09 stsp struct got_packidx_v2_hdr *p;
339 79b11c62 2018-03-09 stsp size_t nobj;
341 79b11c62 2018-03-09 stsp p = calloc(1, sizeof(*p));
342 79b11c62 2018-03-09 stsp if (p == NULL)
343 79b11c62 2018-03-09 stsp return NULL;
345 79b11c62 2018-03-09 stsp memcpy(p, packidx, sizeof(*p));
346 79b11c62 2018-03-09 stsp p->sorted_ids = NULL;
347 79b11c62 2018-03-09 stsp p->crc32 = NULL;
348 79b11c62 2018-03-09 stsp p->offsets = NULL;
349 79b11c62 2018-03-09 stsp p->large_offsets = NULL;
351 79b11c62 2018-03-09 stsp nobj = betoh32(p->fanout_table[0xff]);
353 79b11c62 2018-03-09 stsp p->sorted_ids = calloc(nobj, sizeof(*p->sorted_ids));
354 79b11c62 2018-03-09 stsp if (p->sorted_ids == NULL)
356 79b11c62 2018-03-09 stsp memcpy(p->sorted_ids, packidx->sorted_ids, nobj * sizeof(*p->sorted_ids));
358 79b11c62 2018-03-09 stsp p->crc32 = calloc(nobj, sizeof(*p->crc32));
359 79b11c62 2018-03-09 stsp if (p->crc32 == NULL)
361 79b11c62 2018-03-09 stsp memcpy(p->crc32, packidx->crc32, nobj * sizeof(*p->crc32));
363 79b11c62 2018-03-09 stsp p->offsets = calloc(nobj, sizeof(*p->offsets));
364 79b11c62 2018-03-09 stsp if (p->offsets == NULL)
366 79b11c62 2018-03-09 stsp memcpy(p->offsets, packidx->offsets, nobj * sizeof(*p->offsets));
368 79b11c62 2018-03-09 stsp if (p->large_offsets) {
369 79b11c62 2018-03-09 stsp p->large_offsets = calloc(nobj, sizeof(*p->large_offsets));
370 79b11c62 2018-03-09 stsp if (p->large_offsets == NULL)
372 79b11c62 2018-03-09 stsp memcpy(p->large_offsets, packidx->large_offsets,
373 79b11c62 2018-03-09 stsp nobj * sizeof(*p->large_offsets));
379 79b11c62 2018-03-09 stsp free(p->large_offsets);
380 79b11c62 2018-03-09 stsp free(p->offsets);
381 79b11c62 2018-03-09 stsp free(p->crc32);
382 79b11c62 2018-03-09 stsp free(p->sorted_ids);
384 79b11c62 2018-03-09 stsp return NULL;
387 65cf1e80 2018-03-16 stsp static void
388 65cf1e80 2018-03-16 stsp cache_packidx(struct got_packidx_v2_hdr *packidx, struct got_repository *repo)
392 65cf1e80 2018-03-16 stsp for (i = 0; i < nitems(repo->packidx_cache); i++) {
393 65cf1e80 2018-03-16 stsp if (repo->packidx_cache[i] == NULL)
397 65cf1e80 2018-03-16 stsp if (i == nitems(repo->packidx_cache)) {
398 65cf1e80 2018-03-16 stsp got_packidx_close(repo->packidx_cache[i - 1]);
399 65cf1e80 2018-03-16 stsp memmove(&repo->packidx_cache[1], &repo->packidx_cache[0],
400 65cf1e80 2018-03-16 stsp sizeof(repo->packidx_cache) -
401 65cf1e80 2018-03-16 stsp sizeof(repo->packidx_cache[0]));
405 65cf1e80 2018-03-16 stsp repo->packidx_cache[i] = dup_packidx(packidx);
408 6b9c9673 2018-01-23 stsp static const struct got_error *
409 6b9c9673 2018-01-23 stsp search_packidx(struct got_packidx_v2_hdr **packidx, int *idx,
410 6b9c9673 2018-01-23 stsp struct got_repository *repo, struct got_object_id *id)
412 6b9c9673 2018-01-23 stsp const struct got_error *err;
413 6b9c9673 2018-01-23 stsp char *path_packdir;
414 6b9c9673 2018-01-23 stsp DIR *packdir;
415 6b9c9673 2018-01-23 stsp struct dirent *dent;
416 6b9c9673 2018-01-23 stsp char *path_packidx;
419 65cf1e80 2018-03-16 stsp /* Search pack index cache. */
420 65cf1e80 2018-03-16 stsp for (i = 0; i < nitems(repo->packidx_cache); i++) {
421 65cf1e80 2018-03-16 stsp if (repo->packidx_cache[i] == NULL)
423 72eb3431 2018-04-01 stsp *idx = get_object_idx(repo->packidx_cache[i], id, repo);
424 79b11c62 2018-03-09 stsp if (*idx != -1) {
425 6bb255dc 2018-03-17 stsp *packidx = repo->packidx_cache[i];
426 79b11c62 2018-03-09 stsp return NULL;
429 79b11c62 2018-03-09 stsp /* No luck. Search the filesystem. */
431 6b9c9673 2018-01-23 stsp path_packdir = got_repo_get_path_objects_pack(repo);
432 6b9c9673 2018-01-23 stsp if (path_packdir == NULL)
433 0a585a0d 2018-03-17 stsp return got_error_from_errno();
435 6b9c9673 2018-01-23 stsp packdir = opendir(path_packdir);
436 6b9c9673 2018-01-23 stsp if (packdir == NULL) {
437 6b9c9673 2018-01-23 stsp err = got_error_from_errno();
441 6b9c9673 2018-01-23 stsp while ((dent = readdir(packdir)) != NULL) {
442 6b9c9673 2018-01-23 stsp if (!is_packidx_filename(dent->d_name, dent->d_namlen))
445 6b9c9673 2018-01-23 stsp if (asprintf(&path_packidx, "%s/%s", path_packdir,
446 6b9c9673 2018-01-23 stsp dent->d_name) == -1) {
447 0a585a0d 2018-03-17 stsp err = got_error_from_errno();
451 6b9c9673 2018-01-23 stsp err = got_packidx_open(packidx, path_packidx);
452 6b9c9673 2018-01-23 stsp free(path_packidx);
456 72eb3431 2018-04-01 stsp *idx = get_object_idx(*packidx, id, repo);
457 6b9c9673 2018-01-23 stsp if (*idx != -1) {
458 6b9c9673 2018-01-23 stsp err = NULL; /* found the object */
459 65cf1e80 2018-03-16 stsp cache_packidx(*packidx, repo);
463 6b9c9673 2018-01-23 stsp got_packidx_close(*packidx);
464 6b9c9673 2018-01-23 stsp *packidx = NULL;
467 6b9c9673 2018-01-23 stsp err = got_error(GOT_ERR_NO_OBJ);
469 6b9c9673 2018-01-23 stsp free(path_packdir);
470 ef715580 2018-01-26 stsp if (packdir && closedir(packdir) != 0 && err == 0)
471 6b9c9673 2018-01-23 stsp err = got_error_from_errno();
472 6b9c9673 2018-01-23 stsp return err;
475 c7fe698a 2018-01-23 stsp static const struct got_error *
476 65cf1e80 2018-03-16 stsp get_packfile_path(char **path_packfile, struct got_repository *repo,
477 65cf1e80 2018-03-16 stsp struct got_packidx_v2_hdr *packidx)
479 65cf1e80 2018-03-16 stsp char *path_packdir;
480 65cf1e80 2018-03-16 stsp char hex[SHA1_DIGEST_STRING_LENGTH];
481 65cf1e80 2018-03-16 stsp char *sha1str;
483 65cf1e80 2018-03-16 stsp path_packdir = got_repo_get_path_objects_pack(repo);
484 65cf1e80 2018-03-16 stsp if (path_packdir == NULL)
485 0a585a0d 2018-03-17 stsp return got_error_from_errno();
487 65cf1e80 2018-03-16 stsp sha1str = got_sha1_digest_to_str(packidx->trailer.packfile_sha1,
488 65cf1e80 2018-03-16 stsp hex, sizeof(hex));
489 65cf1e80 2018-03-16 stsp if (sha1str == NULL)
490 65cf1e80 2018-03-16 stsp return got_error(GOT_ERR_PACKIDX_CSUM);
492 65cf1e80 2018-03-16 stsp if (asprintf(path_packfile, "%s/%s%s%s", path_packdir,
493 65cf1e80 2018-03-16 stsp GOT_PACK_PREFIX, sha1str, GOT_PACKFILE_SUFFIX) == -1) {
494 65cf1e80 2018-03-16 stsp *path_packfile = NULL;
495 0a585a0d 2018-03-17 stsp return got_error_from_errno();
498 65cf1e80 2018-03-16 stsp return NULL;
501 65cf1e80 2018-03-16 stsp const struct got_error *
502 65cf1e80 2018-03-16 stsp read_packfile_hdr(FILE *f, struct got_packidx_v2_hdr *packidx)
504 65cf1e80 2018-03-16 stsp const struct got_error *err = NULL;
505 65cf1e80 2018-03-16 stsp uint32_t totobj = betoh32(packidx->fanout_table[0xff]);
506 65cf1e80 2018-03-16 stsp struct got_packfile_hdr hdr;
509 65cf1e80 2018-03-16 stsp n = fread(&hdr, sizeof(hdr), 1, f);
510 65cf1e80 2018-03-16 stsp if (n != 1)
511 65cf1e80 2018-03-16 stsp return got_ferror(f, GOT_ERR_BAD_PACKIDX);
513 65cf1e80 2018-03-16 stsp if (betoh32(hdr.signature) != GOT_PACKFILE_SIGNATURE ||
514 65cf1e80 2018-03-16 stsp betoh32(hdr.version) != GOT_PACKFILE_VERSION ||
515 65cf1e80 2018-03-16 stsp betoh32(hdr.nobjects) != totobj)
516 65cf1e80 2018-03-16 stsp err = got_error(GOT_ERR_BAD_PACKFILE);
518 65cf1e80 2018-03-16 stsp return err;
521 7e656b93 2018-03-17 stsp static const struct got_error *
522 7e656b93 2018-03-17 stsp open_packfile(FILE **packfile, const char *path_packfile,
523 7e656b93 2018-03-17 stsp struct got_repository *repo, struct got_packidx_v2_hdr *packidx)
525 7e656b93 2018-03-17 stsp const struct got_error *err = NULL;
527 7e656b93 2018-03-17 stsp *packfile = NULL;
529 7e656b93 2018-03-17 stsp *packfile = fopen(path_packfile, "rb");
530 7e656b93 2018-03-17 stsp if (*packfile == NULL) {
531 7e656b93 2018-03-17 stsp err = got_error_from_errno();
532 7e656b93 2018-03-17 stsp return err;
535 7e656b93 2018-03-17 stsp if (packidx) {
536 7e656b93 2018-03-17 stsp err = read_packfile_hdr(*packfile, packidx);
538 7e656b93 2018-03-17 stsp fclose(*packfile);
539 7e656b93 2018-03-17 stsp *packfile = NULL;
542 7e656b93 2018-03-17 stsp return err;
546 7e656b93 2018-03-17 stsp got_pack_close(struct got_pack *pack)
548 4589e373 2018-03-17 stsp fclose(pack->packfile);
549 4589e373 2018-03-17 stsp pack->packfile = NULL;
550 4589e373 2018-03-17 stsp free(pack->path_packfile);
551 4589e373 2018-03-17 stsp pack->path_packfile = NULL;
552 4589e373 2018-03-17 stsp pack->filesize = 0;
555 7e656b93 2018-03-17 stsp static const struct got_error *
556 7e656b93 2018-03-17 stsp cache_pack(struct got_pack **packp, const char *path_packfile,
557 7e656b93 2018-03-17 stsp struct got_packidx_v2_hdr *packidx, struct got_repository *repo)
559 7e656b93 2018-03-17 stsp const struct got_error *err = NULL;
560 7e656b93 2018-03-17 stsp struct got_pack *pack = NULL;
564 7e656b93 2018-03-17 stsp *packp = NULL;
566 7e656b93 2018-03-17 stsp for (i = 0; i < nitems(repo->packs); i++) {
567 7e656b93 2018-03-17 stsp pack = &repo->packs[i];
568 7e656b93 2018-03-17 stsp if (pack->path_packfile == NULL)
570 7e656b93 2018-03-17 stsp if (strcmp(pack->path_packfile, path_packfile) == 0)
571 7e656b93 2018-03-17 stsp return NULL;
574 7e656b93 2018-03-17 stsp if (i == nitems(repo->packs) - 1) {
575 7e656b93 2018-03-17 stsp got_pack_close(&repo->packs[i - 1]);
576 7e656b93 2018-03-17 stsp memmove(&repo->packs[1], &repo->packs[0],
577 7e656b93 2018-03-17 stsp sizeof(repo->packs) - sizeof(repo->packs[0]));
581 7e656b93 2018-03-17 stsp pack = &repo->packs[i];
583 7e656b93 2018-03-17 stsp pack->path_packfile = strdup(path_packfile);
584 7e656b93 2018-03-17 stsp if (pack->path_packfile == NULL) {
585 0a585a0d 2018-03-17 stsp err = got_error_from_errno();
589 7e656b93 2018-03-17 stsp err = open_packfile(&pack->packfile, path_packfile, repo, packidx);
593 7e656b93 2018-03-17 stsp err = get_packfile_size(&pack->filesize, path_packfile);
597 7e656b93 2018-03-17 stsp free(pack->path_packfile);
598 7e656b93 2018-03-17 stsp free(pack);
599 7e656b93 2018-03-17 stsp } else if (packp)
600 7e656b93 2018-03-17 stsp *packp = pack;
601 c7fe698a 2018-01-23 stsp return err;
604 7e656b93 2018-03-17 stsp struct got_pack *
605 7e656b93 2018-03-17 stsp get_cached_pack(const char *path_packfile, struct got_repository *repo)
607 7e656b93 2018-03-17 stsp struct got_pack *pack = NULL;
610 7e656b93 2018-03-17 stsp for (i = 0; i < nitems(repo->packs); i++) {
611 7e656b93 2018-03-17 stsp pack = &repo->packs[i];
612 7e656b93 2018-03-17 stsp if (pack->path_packfile == NULL)
614 7e656b93 2018-03-17 stsp if (strcmp(pack->path_packfile, path_packfile) == 0)
615 7e656b93 2018-03-17 stsp return pack;
618 7e656b93 2018-03-17 stsp return NULL;
621 c7fe698a 2018-01-23 stsp static const struct got_error *
622 348f621c 2018-01-23 stsp parse_object_type_and_size(uint8_t *type, uint64_t *size, size_t *len,
623 c3703302 2018-01-23 stsp FILE *packfile)
625 a487c1d0 2018-01-14 stsp uint8_t t = 0;
626 a487c1d0 2018-01-14 stsp uint64_t s = 0;
627 a487c1d0 2018-01-14 stsp uint8_t sizeN;
632 a1fd68d8 2018-01-12 stsp /* We do not support size values which don't fit in 64 bit. */
634 a487c1d0 2018-01-14 stsp return got_error(GOT_ERR_NO_SPACE);
636 a1fd68d8 2018-01-12 stsp n = fread(&sizeN, sizeof(sizeN), 1, packfile);
637 a487c1d0 2018-01-14 stsp if (n != 1)
638 a487c1d0 2018-01-14 stsp return got_ferror(packfile, GOT_ERR_BAD_PACKIDX);
640 a1fd68d8 2018-01-12 stsp if (i == 0) {
641 a487c1d0 2018-01-14 stsp t = (sizeN & GOT_PACK_OBJ_SIZE0_TYPE_MASK) >>
642 a1fd68d8 2018-01-12 stsp GOT_PACK_OBJ_SIZE0_TYPE_MASK_SHIFT;
643 a487c1d0 2018-01-14 stsp s = (sizeN & GOT_PACK_OBJ_SIZE0_VAL_MASK);
645 a1fd68d8 2018-01-12 stsp size_t shift = 4 + 7 * (i - 1);
646 a487c1d0 2018-01-14 stsp s |= ((sizeN & GOT_PACK_OBJ_SIZE_VAL_MASK) << shift);
649 a1fd68d8 2018-01-12 stsp } while (sizeN & GOT_PACK_OBJ_SIZE_MORE);
653 3ee5fc21 2018-01-17 stsp *len = i * sizeof(sizeN);
654 a487c1d0 2018-01-14 stsp return NULL;
657 a1fd68d8 2018-01-12 stsp static const struct got_error *
658 9710aac2 2018-01-19 stsp open_plain_object(struct got_object **obj, const char *path_packfile,
659 6ccb713b 2018-01-19 stsp struct got_object_id *id, uint8_t type, off_t offset, size_t size)
661 6ccb713b 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
662 6ccb713b 2018-01-19 stsp if (*obj == NULL)
663 0a585a0d 2018-03-17 stsp return got_error_from_errno();
665 6ccb713b 2018-01-19 stsp (*obj)->path_packfile = strdup(path_packfile);
666 6ccb713b 2018-01-19 stsp if ((*obj)->path_packfile == NULL) {
667 0a585a0d 2018-03-17 stsp const struct got_error *err = got_error_from_errno();
668 6ccb713b 2018-01-19 stsp free(*obj);
669 6ccb713b 2018-01-19 stsp *obj = NULL;
670 0a585a0d 2018-03-17 stsp return err;
673 6ccb713b 2018-01-19 stsp (*obj)->type = type;
674 6ccb713b 2018-01-19 stsp (*obj)->flags = GOT_OBJ_FLAG_PACKED;
675 6ccb713b 2018-01-19 stsp (*obj)->hdrlen = 0;
676 6ccb713b 2018-01-19 stsp (*obj)->size = size;
677 6ccb713b 2018-01-19 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
678 6ccb713b 2018-01-19 stsp (*obj)->pack_offset = offset;
680 b107e67f 2018-01-19 stsp return NULL;
683 b107e67f 2018-01-19 stsp static const struct got_error *
684 348f621c 2018-01-23 stsp parse_negative_offset(int64_t *offset, size_t *len, FILE *packfile)
686 b107e67f 2018-01-19 stsp int64_t o = 0;
687 b107e67f 2018-01-19 stsp uint8_t offN;
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 b107e67f 2018-01-19 stsp n = fread(&offN, sizeof(offN), 1, packfile);
697 b107e67f 2018-01-19 stsp if (n != 1)
698 b107e67f 2018-01-19 stsp return got_ferror(packfile, GOT_ERR_BAD_PACKIDX);
700 b107e67f 2018-01-19 stsp if (i == 0)
701 b107e67f 2018-01-19 stsp o = (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
705 cecc778e 2018-01-23 stsp o += (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
708 b107e67f 2018-01-19 stsp } while (offN & GOT_PACK_OBJ_DELTA_OFF_MORE);
710 b107e67f 2018-01-19 stsp *offset = o;
711 b107e67f 2018-01-19 stsp *len = i * sizeof(offN);
712 6ccb713b 2018-01-19 stsp return NULL;
715 6ccb713b 2018-01-19 stsp static const struct got_error *
716 96f5e8b3 2018-01-23 stsp parse_offset_delta(off_t *base_offset, FILE *packfile, off_t offset)
718 96f5e8b3 2018-01-23 stsp const struct got_error *err;
719 b107e67f 2018-01-19 stsp int64_t negoffset;
720 b107e67f 2018-01-19 stsp size_t negofflen;
722 348f621c 2018-01-23 stsp err = parse_negative_offset(&negoffset, &negofflen, packfile);
724 b107e67f 2018-01-19 stsp return err;
726 b107e67f 2018-01-19 stsp /* Compute the base object's offset (must be in the same pack file). */
727 96f5e8b3 2018-01-23 stsp *base_offset = (offset - negoffset);
728 96f5e8b3 2018-01-23 stsp if (*base_offset <= 0)
729 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_BAD_PACKFILE);
731 96f5e8b3 2018-01-23 stsp return NULL;
734 0e22967e 2018-02-11 stsp static const struct got_error *
735 0e22967e 2018-02-11 stsp resolve_delta_chain(struct got_delta_chain *, struct got_repository *,
736 0e22967e 2018-02-11 stsp FILE *, const char *, off_t, size_t, int, size_t);
738 96f5e8b3 2018-01-23 stsp static const struct got_error *
739 bdd2fbb3 2018-02-11 stsp add_delta(struct got_delta_chain *deltas, const char *path_packfile,
740 bdd2fbb3 2018-02-11 stsp off_t delta_offset, size_t tslen, int delta_type, size_t delta_size,
741 a53d2f13 2018-03-17 stsp size_t delta_data_offset, uint8_t *delta_buf, size_t delta_len)
743 bdd2fbb3 2018-02-11 stsp struct got_delta *delta;
745 bdd2fbb3 2018-02-11 stsp delta = got_delta_open(path_packfile, delta_offset, tslen,
746 a53d2f13 2018-03-17 stsp delta_type, delta_size, delta_data_offset, delta_buf,
747 a53d2f13 2018-03-17 stsp delta_len);
748 bdd2fbb3 2018-02-11 stsp if (delta == NULL)
749 0a585a0d 2018-03-17 stsp return got_error_from_errno();
750 bdd2fbb3 2018-02-11 stsp /* delta is freed in got_object_close() */
751 bdd2fbb3 2018-02-11 stsp deltas->nentries++;
752 bdd2fbb3 2018-02-11 stsp SIMPLEQ_INSERT_HEAD(&deltas->entries, delta, entry);
753 bdd2fbb3 2018-02-11 stsp return NULL;
756 bdd2fbb3 2018-02-11 stsp static const struct got_error *
757 6b9c9673 2018-01-23 stsp resolve_offset_delta(struct got_delta_chain *deltas,
758 6b9c9673 2018-01-23 stsp struct got_repository *repo, FILE *packfile, const char *path_packfile,
759 bdd2fbb3 2018-02-11 stsp off_t delta_offset,size_t tslen, int delta_type, size_t delta_size)
762 a3500804 2018-01-23 stsp const struct got_error *err;
763 c3703302 2018-01-23 stsp off_t base_offset;
764 c3703302 2018-01-23 stsp uint8_t base_type;
765 c3703302 2018-01-23 stsp uint64_t base_size;
766 c3703302 2018-01-23 stsp size_t base_tslen;
767 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
768 a53d2f13 2018-03-17 stsp uint8_t *delta_buf;
769 a53d2f13 2018-03-17 stsp size_t delta_len;
771 c3703302 2018-01-23 stsp err = parse_offset_delta(&base_offset, packfile, delta_offset);
773 a3500804 2018-01-23 stsp return err;
775 bdd2fbb3 2018-02-11 stsp delta_data_offset = ftello(packfile);
776 bdd2fbb3 2018-02-11 stsp if (delta_data_offset == -1)
777 bdd2fbb3 2018-02-11 stsp return got_error_from_errno();
779 a53d2f13 2018-03-17 stsp err = got_inflate_to_mem(&delta_buf, &delta_len, packfile);
781 a53d2f13 2018-03-17 stsp return err;
783 bdd2fbb3 2018-02-11 stsp err = add_delta(deltas, path_packfile, delta_offset, tslen,
784 a53d2f13 2018-03-17 stsp delta_type, delta_size, delta_data_offset, delta_buf, delta_len);
786 bdd2fbb3 2018-02-11 stsp return err;
788 c3703302 2018-01-23 stsp /* An offset delta must be in the same packfile. */
789 c3703302 2018-01-23 stsp if (fseeko(packfile, base_offset, SEEK_SET) != 0)
790 b107e67f 2018-01-19 stsp return got_error_from_errno();
792 348f621c 2018-01-23 stsp err = parse_object_type_and_size(&base_type, &base_size, &base_tslen,
795 b107e67f 2018-01-19 stsp return err;
797 6b9c9673 2018-01-23 stsp return resolve_delta_chain(deltas, repo, packfile, path_packfile,
798 0e22967e 2018-02-11 stsp base_offset, base_tslen, base_type, base_size);
801 c3703302 2018-01-23 stsp static const struct got_error *
802 6b9c9673 2018-01-23 stsp resolve_ref_delta(struct got_delta_chain *deltas, struct got_repository *repo,
803 bdd2fbb3 2018-02-11 stsp FILE *packfile, const char *path_packfile, off_t delta_offset,
804 bdd2fbb3 2018-02-11 stsp size_t tslen, int delta_type, size_t delta_size)
806 6b9c9673 2018-01-23 stsp const struct got_error *err;
807 6b9c9673 2018-01-23 stsp struct got_object_id id;
808 6b9c9673 2018-01-23 stsp struct got_packidx_v2_hdr *packidx;
810 6b9c9673 2018-01-23 stsp off_t base_offset;
811 6b9c9673 2018-01-23 stsp uint8_t base_type;
812 6b9c9673 2018-01-23 stsp uint64_t base_size;
813 6b9c9673 2018-01-23 stsp size_t base_tslen;
815 65cf1e80 2018-03-16 stsp char *path_base_packfile;
816 999f19f6 2018-03-17 stsp struct got_pack *base_pack;
817 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
818 a53d2f13 2018-03-17 stsp uint8_t *delta_buf;
819 a53d2f13 2018-03-17 stsp size_t delta_len;
821 6b9c9673 2018-01-23 stsp n = fread(&id, sizeof(id), 1, packfile);
822 6b9c9673 2018-01-23 stsp if (n != 1)
823 6b9c9673 2018-01-23 stsp return got_ferror(packfile, GOT_ERR_IO);
825 bdd2fbb3 2018-02-11 stsp delta_data_offset = ftello(packfile);
826 bdd2fbb3 2018-02-11 stsp if (delta_data_offset == -1)
827 bdd2fbb3 2018-02-11 stsp return got_error_from_errno();
829 a53d2f13 2018-03-17 stsp err = got_inflate_to_mem(&delta_buf, &delta_len, packfile);
831 a53d2f13 2018-03-17 stsp return err;
833 bdd2fbb3 2018-02-11 stsp err = add_delta(deltas, path_packfile, delta_offset, tslen,
834 a53d2f13 2018-03-17 stsp delta_type, delta_size, delta_data_offset, delta_buf, delta_len);
836 bdd2fbb3 2018-02-11 stsp return err;
838 6b9c9673 2018-01-23 stsp err = search_packidx(&packidx, &idx, repo, &id);
840 6b9c9673 2018-01-23 stsp return err;
842 6b9c9673 2018-01-23 stsp base_offset = get_object_offset(packidx, idx);
843 6b9c9673 2018-01-23 stsp if (base_offset == (uint64_t)-1) {
844 6b9c9673 2018-01-23 stsp return got_error(GOT_ERR_BAD_PACKIDX);
847 7e656b93 2018-03-17 stsp err = get_packfile_path(&path_base_packfile, repo, packidx);
849 7e656b93 2018-03-17 stsp return err;
851 999f19f6 2018-03-17 stsp base_pack = get_cached_pack(path_base_packfile, repo);
852 999f19f6 2018-03-17 stsp if (base_pack == NULL) {
853 999f19f6 2018-03-17 stsp err = cache_pack(&base_pack, path_base_packfile, NULL, repo);
858 999f19f6 2018-03-17 stsp if (fseeko(base_pack->packfile, base_offset, SEEK_SET) != 0) {
859 6b9c9673 2018-01-23 stsp err = got_error_from_errno();
863 6b9c9673 2018-01-23 stsp err = parse_object_type_and_size(&base_type, &base_size, &base_tslen,
864 999f19f6 2018-03-17 stsp base_pack->packfile);
868 999f19f6 2018-03-17 stsp err = resolve_delta_chain(deltas, repo, base_pack->packfile,
869 0e22967e 2018-02-11 stsp path_base_packfile, base_offset, base_tslen, base_type,
870 0e22967e 2018-02-11 stsp base_size);
872 65cf1e80 2018-03-16 stsp free(path_base_packfile);
873 6b9c9673 2018-01-23 stsp return err;
876 6b9c9673 2018-01-23 stsp static const struct got_error *
877 6b9c9673 2018-01-23 stsp resolve_delta_chain(struct got_delta_chain *deltas, struct got_repository *repo,
878 0e22967e 2018-02-11 stsp FILE *packfile, const char *path_packfile, off_t delta_offset, size_t tslen,
879 0e22967e 2018-02-11 stsp int delta_type, size_t delta_size)
881 c3703302 2018-01-23 stsp const struct got_error *err = NULL;
883 c3703302 2018-01-23 stsp switch (delta_type) {
884 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_COMMIT:
885 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TREE:
886 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_BLOB:
887 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TAG:
888 c3703302 2018-01-23 stsp /* Plain types are the final delta base. Recursion ends. */
889 bdd2fbb3 2018-02-11 stsp err = add_delta(deltas, path_packfile, delta_offset, tslen,
890 a53d2f13 2018-03-17 stsp delta_type, delta_size, 0, NULL, 0);
892 a3500804 2018-01-23 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
893 6b9c9673 2018-01-23 stsp err = resolve_offset_delta(deltas, repo, packfile,
894 bdd2fbb3 2018-02-11 stsp path_packfile, delta_offset, tslen, delta_type,
895 bdd2fbb3 2018-02-11 stsp delta_size);
897 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_REF_DELTA:
898 bdd2fbb3 2018-02-11 stsp err = resolve_ref_delta(deltas, repo, packfile,
899 bdd2fbb3 2018-02-11 stsp path_packfile, delta_offset, tslen, delta_type,
900 bdd2fbb3 2018-02-11 stsp delta_size);
903 4810de4a 2018-04-01 stsp return got_error(GOT_ERR_OBJ_TYPE);
906 96f5e8b3 2018-01-23 stsp return err;
909 96f5e8b3 2018-01-23 stsp static const struct got_error *
910 a48db7e5 2018-01-23 stsp open_delta_object(struct got_object **obj, struct got_repository *repo,
911 a48db7e5 2018-01-23 stsp struct got_packidx_v2_hdr *packidx, const char *path_packfile,
912 a48db7e5 2018-01-23 stsp FILE *packfile, struct got_object_id *id, off_t offset, size_t tslen,
913 a48db7e5 2018-01-23 stsp int delta_type, size_t delta_size)
915 96f5e8b3 2018-01-23 stsp const struct got_error *err = NULL;
916 96f5e8b3 2018-01-23 stsp int resolved_type;
918 b107e67f 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
919 b107e67f 2018-01-19 stsp if (*obj == NULL)
920 0a585a0d 2018-03-17 stsp return got_error_from_errno();
922 96f5e8b3 2018-01-23 stsp (*obj)->flags = 0;
923 b107e67f 2018-01-19 stsp (*obj)->hdrlen = 0;
924 39e73dc9 2018-03-03 stsp (*obj)->size = 0; /* Not known because deltas aren't applied yet. */
925 b107e67f 2018-01-19 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
926 cecc778e 2018-01-23 stsp (*obj)->pack_offset = offset + tslen;
928 96f5e8b3 2018-01-23 stsp (*obj)->path_packfile = strdup(path_packfile);
929 96f5e8b3 2018-01-23 stsp if ((*obj)->path_packfile == NULL) {
930 0a585a0d 2018-03-17 stsp err = got_error_from_errno();
933 96f5e8b3 2018-01-23 stsp (*obj)->flags |= GOT_OBJ_FLAG_PACKED;
935 96f5e8b3 2018-01-23 stsp SIMPLEQ_INIT(&(*obj)->deltas.entries);
936 96f5e8b3 2018-01-23 stsp (*obj)->flags |= GOT_OBJ_FLAG_DELTIFIED;
938 6b9c9673 2018-01-23 stsp err = resolve_delta_chain(&(*obj)->deltas, repo, packfile,
939 0e22967e 2018-02-11 stsp path_packfile, offset, tslen, delta_type, delta_size);
943 96f5e8b3 2018-01-23 stsp err = got_delta_chain_get_base_type(&resolved_type, &(*obj)->deltas);
946 96f5e8b3 2018-01-23 stsp (*obj)->type = resolved_type;
950 96f5e8b3 2018-01-23 stsp got_object_close(*obj);
951 96f5e8b3 2018-01-23 stsp *obj = NULL;
953 96f5e8b3 2018-01-23 stsp return err;
956 b107e67f 2018-01-19 stsp static const struct got_error *
957 6c00b545 2018-01-17 stsp open_packed_object(struct got_object **obj, struct got_repository *repo,
958 6b9c9673 2018-01-23 stsp struct got_packidx_v2_hdr *packidx, int idx, struct got_object_id *id)
960 a1fd68d8 2018-01-12 stsp const struct got_error *err = NULL;
961 a1fd68d8 2018-01-12 stsp off_t offset;
962 65cf1e80 2018-03-16 stsp char *path_packfile;
963 6d89869a 2018-03-17 stsp struct got_pack *pack;
964 6c00b545 2018-01-17 stsp uint8_t type;
965 6c00b545 2018-01-17 stsp uint64_t size;
966 3ee5fc21 2018-01-17 stsp size_t tslen;
968 6c00b545 2018-01-17 stsp *obj = NULL;
970 a1fd68d8 2018-01-12 stsp offset = get_object_offset(packidx, idx);
971 a1fd68d8 2018-01-12 stsp if (offset == (uint64_t)-1)
972 a1fd68d8 2018-01-12 stsp return got_error(GOT_ERR_BAD_PACKIDX);
974 7e656b93 2018-03-17 stsp err = get_packfile_path(&path_packfile, repo, packidx);
976 6b9c9673 2018-01-23 stsp return err;
978 6d89869a 2018-03-17 stsp pack = get_cached_pack(path_packfile, repo);
979 6d89869a 2018-03-17 stsp if (pack == NULL) {
980 6d89869a 2018-03-17 stsp err = cache_pack(&pack, path_packfile, packidx, repo);
985 6d89869a 2018-03-17 stsp if (fseeko(pack->packfile, offset, SEEK_SET) != 0) {
986 6c00b545 2018-01-17 stsp err = got_error_from_errno();
990 6d89869a 2018-03-17 stsp err = parse_object_type_and_size(&type, &size, &tslen, pack->packfile);
994 6c00b545 2018-01-17 stsp switch (type) {
995 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_COMMIT:
996 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_TREE:
997 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_BLOB:
998 d33fc9ef 2018-01-23 stsp case GOT_OBJ_TYPE_TAG:
999 9710aac2 2018-01-19 stsp err = open_plain_object(obj, path_packfile, id, type,
1000 6ccb713b 2018-01-19 stsp offset + tslen, size);
1003 b107e67f 2018-01-19 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
1004 a48db7e5 2018-01-23 stsp case GOT_OBJ_TYPE_REF_DELTA:
1005 a48db7e5 2018-01-23 stsp err = open_delta_object(obj, repo, packidx, path_packfile,
1006 6d89869a 2018-03-17 stsp pack->packfile, id, offset, tslen, type, size);
1010 4810de4a 2018-04-01 stsp err = got_error(GOT_ERR_OBJ_TYPE);
1011 6c00b545 2018-01-17 stsp goto done;
1014 65cf1e80 2018-03-16 stsp free(path_packfile);
1015 a1fd68d8 2018-01-12 stsp return err;
1018 a1fd68d8 2018-01-12 stsp const struct got_error *
1019 6c00b545 2018-01-17 stsp got_packfile_open_object(struct got_object **obj, struct got_object_id *id,
1020 a1fd68d8 2018-01-12 stsp struct got_repository *repo)
1022 a1fd68d8 2018-01-12 stsp const struct got_error *err = NULL;
1023 6b9c9673 2018-01-23 stsp struct got_packidx_v2_hdr *packidx = NULL;
1026 6b9c9673 2018-01-23 stsp err = search_packidx(&packidx, &idx, repo, id);
1028 6b9c9673 2018-01-23 stsp return err;
1030 6b9c9673 2018-01-23 stsp err = open_packed_object(obj, repo, packidx, idx, id);
1032 7e656b93 2018-03-17 stsp return err;
1034 7e656b93 2018-03-17 stsp err = cache_pack(NULL, (*obj)->path_packfile, packidx, repo);
1035 3ee5fc21 2018-01-17 stsp return err;
1038 efd2a263 2018-01-19 stsp static const struct got_error *
1039 40426839 2018-03-17 stsp get_delta_chain_max_size(uint64_t *max_size, struct got_delta_chain *deltas)
1041 22484865 2018-03-13 stsp struct got_delta *delta;
1042 22484865 2018-03-13 stsp uint64_t base_size = 0, result_size = 0;
1044 22484865 2018-03-13 stsp *max_size = 0;
1045 22484865 2018-03-13 stsp SIMPLEQ_FOREACH(delta, &deltas->entries, entry) {
1046 22484865 2018-03-13 stsp /* Plain object types are the delta base. */
1047 22484865 2018-03-13 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1048 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1049 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1050 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1051 22484865 2018-03-13 stsp const struct got_error *err;
1052 a53d2f13 2018-03-17 stsp err = got_delta_get_sizes(&base_size, &result_size,
1053 a53d2f13 2018-03-17 stsp delta->delta_buf, delta->delta_len);
1055 22484865 2018-03-13 stsp return err;
1057 22484865 2018-03-13 stsp base_size = delta->size;
1058 22484865 2018-03-13 stsp if (base_size > *max_size)
1059 22484865 2018-03-13 stsp *max_size = base_size;
1060 22484865 2018-03-13 stsp if (result_size > *max_size)
1061 22484865 2018-03-13 stsp *max_size = result_size;
1064 9feb4ff2 2018-03-14 stsp return NULL;
1067 22484865 2018-03-13 stsp static const struct got_error *
1068 b29656e2 2018-03-16 stsp dump_delta_chain_to_file(size_t *result_size, struct got_delta_chain *deltas,
1069 72eb3431 2018-04-01 stsp FILE *outfile, struct got_repository *repo)
1071 efd2a263 2018-01-19 stsp const struct got_error *err = NULL;
1072 6691714a 2018-01-23 stsp struct got_delta *delta;
1073 22484865 2018-03-13 stsp FILE *base_file = NULL, *accum_file = NULL;
1074 8628c62d 2018-03-15 stsp uint8_t *base_buf = NULL, *accum_buf = NULL;
1075 b29656e2 2018-03-16 stsp size_t accum_size = 0;
1076 22484865 2018-03-13 stsp uint64_t max_size;
1077 6691714a 2018-01-23 stsp int n = 0;
1079 b29656e2 2018-03-16 stsp *result_size = 0;
1081 710bb5ca 2018-01-23 stsp if (SIMPLEQ_EMPTY(&deltas->entries))
1082 6691714a 2018-01-23 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
1084 8628c62d 2018-03-15 stsp /* We process small enough files entirely in memory for speed. */
1085 40426839 2018-03-17 stsp err = get_delta_chain_max_size(&max_size, deltas);
1087 22484865 2018-03-13 stsp return err;
1088 8628c62d 2018-03-15 stsp if (max_size < GOT_DELTA_RESULT_SIZE_CACHED_MAX) {
1089 8628c62d 2018-03-15 stsp accum_buf = malloc(max_size);
1090 8628c62d 2018-03-15 stsp if (accum_buf == NULL)
1091 0a585a0d 2018-03-17 stsp return got_error_from_errno();
1093 22484865 2018-03-13 stsp base_file = got_opentemp();
1094 8628c62d 2018-03-15 stsp if (base_file == NULL)
1095 8628c62d 2018-03-15 stsp return got_error_from_errno();
1097 22484865 2018-03-13 stsp accum_file = got_opentemp();
1098 8628c62d 2018-03-15 stsp if (accum_file == NULL) {
1099 8628c62d 2018-03-15 stsp err = got_error_from_errno();
1100 8628c62d 2018-03-15 stsp fclose(base_file);
1101 8628c62d 2018-03-15 stsp return err;
1105 6691714a 2018-01-23 stsp /* Deltas are ordered in ascending order. */
1106 710bb5ca 2018-01-23 stsp SIMPLEQ_FOREACH(delta, &deltas->entries, entry) {
1107 a6b158cc 2018-02-11 stsp if (n == 0) {
1108 72eb3431 2018-04-01 stsp struct got_pack *pack;
1109 8628c62d 2018-03-15 stsp size_t base_len;
1111 a6b158cc 2018-02-11 stsp /* Plain object types are the delta base. */
1112 a6b158cc 2018-02-11 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1113 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1114 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1115 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1116 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1117 72eb3431 2018-04-01 stsp goto done;
1120 72eb3431 2018-04-01 stsp pack = get_cached_pack(delta->path_packfile, repo);
1121 72eb3431 2018-04-01 stsp if (pack == NULL) {
1122 a6b158cc 2018-02-11 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1123 a6b158cc 2018-02-11 stsp goto done;
1126 f7e127f3 2018-03-17 stsp if (fseeko(pack->packfile, delta->offset + delta->tslen,
1127 bdd2fbb3 2018-02-11 stsp SEEK_SET) != 0) {
1128 bdd2fbb3 2018-02-11 stsp err = got_error_from_errno();
1129 bdd2fbb3 2018-02-11 stsp goto done;
1131 8628c62d 2018-03-15 stsp if (base_file)
1132 7e656b93 2018-03-17 stsp err = got_inflate_to_file(&base_len,
1133 f7e127f3 2018-03-17 stsp pack->packfile, base_file);
1135 8628c62d 2018-03-15 stsp err = got_inflate_to_mem(&base_buf, &base_len,
1136 f7e127f3 2018-03-17 stsp pack->packfile);
1137 8628c62d 2018-03-15 stsp if (base_len < max_size) {
1138 8628c62d 2018-03-15 stsp uint8_t *p;
1139 8628c62d 2018-03-15 stsp p = reallocarray(base_buf, 1, max_size);
1140 8628c62d 2018-03-15 stsp if (p == NULL) {
1141 0a585a0d 2018-03-17 stsp err = got_error_from_errno();
1142 8628c62d 2018-03-15 stsp goto done;
1144 8628c62d 2018-03-15 stsp base_buf = p;
1148 a6b158cc 2018-02-11 stsp goto done;
1150 8628c62d 2018-03-15 stsp if (base_file)
1151 8628c62d 2018-03-15 stsp rewind(base_file);
1155 8628c62d 2018-03-15 stsp if (base_buf) {
1156 a53d2f13 2018-03-17 stsp err = got_delta_apply_in_mem(base_buf, delta->delta_buf,
1157 a53d2f13 2018-03-17 stsp delta->delta_len, accum_buf, &accum_size);
1160 a53d2f13 2018-03-17 stsp err = got_delta_apply(base_file, delta->delta_buf,
1161 a53d2f13 2018-03-17 stsp delta->delta_len,
1162 8628c62d 2018-03-15 stsp /* Final delta application writes to output file. */
1163 b29656e2 2018-03-16 stsp ++n < deltas->nentries ? accum_file : outfile,
1164 b29656e2 2018-03-16 stsp &accum_size);
1167 6691714a 2018-01-23 stsp goto done;
1169 710bb5ca 2018-01-23 stsp if (n < deltas->nentries) {
1170 6691714a 2018-01-23 stsp /* Accumulated delta becomes the new base. */
1171 8628c62d 2018-03-15 stsp if (base_buf) {
1172 8628c62d 2018-03-15 stsp uint8_t *tmp = accum_buf;
1173 8628c62d 2018-03-15 stsp accum_buf = base_buf;
1174 8628c62d 2018-03-15 stsp base_buf = tmp;
1176 8628c62d 2018-03-15 stsp FILE *tmp = accum_file;
1177 8628c62d 2018-03-15 stsp accum_file = base_file;
1178 8628c62d 2018-03-15 stsp base_file = tmp;
1179 8628c62d 2018-03-15 stsp rewind(base_file);
1180 8628c62d 2018-03-15 stsp rewind(accum_file);
1186 8628c62d 2018-03-15 stsp free(base_buf);
1187 8628c62d 2018-03-15 stsp if (accum_buf) {
1188 8628c62d 2018-03-15 stsp size_t len = fwrite(accum_buf, 1, accum_size, outfile);
1189 8628c62d 2018-03-15 stsp free(accum_buf);
1190 8628c62d 2018-03-15 stsp if (len != accum_size)
1191 8628c62d 2018-03-15 stsp return got_ferror(outfile, GOT_ERR_IO);
1193 8628c62d 2018-03-15 stsp if (base_file)
1194 8628c62d 2018-03-15 stsp fclose(base_file);
1195 8628c62d 2018-03-15 stsp if (accum_file)
1196 8628c62d 2018-03-15 stsp fclose(accum_file);
1197 6691714a 2018-01-23 stsp rewind(outfile);
1198 b29656e2 2018-03-16 stsp if (err == NULL)
1199 b29656e2 2018-03-16 stsp *result_size = accum_size;
1200 e0ab43e7 2018-03-16 stsp return err;
1203 e0ab43e7 2018-03-16 stsp static const struct got_error *
1204 e0ab43e7 2018-03-16 stsp dump_delta_chain_to_mem(uint8_t **outbuf, size_t *outlen,
1205 72eb3431 2018-04-01 stsp struct got_delta_chain *deltas, struct got_repository *repo)
1207 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1208 e0ab43e7 2018-03-16 stsp struct got_delta *delta;
1209 e0ab43e7 2018-03-16 stsp uint8_t *base_buf = NULL, *accum_buf = NULL;
1210 e0ab43e7 2018-03-16 stsp size_t accum_size;
1211 e0ab43e7 2018-03-16 stsp uint64_t max_size;
1212 e0ab43e7 2018-03-16 stsp int n = 0;
1214 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1215 e0ab43e7 2018-03-16 stsp *outlen = 0;
1217 e0ab43e7 2018-03-16 stsp if (SIMPLEQ_EMPTY(&deltas->entries))
1218 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
1220 40426839 2018-03-17 stsp err = get_delta_chain_max_size(&max_size, deltas);
1222 e0ab43e7 2018-03-16 stsp return err;
1223 e0ab43e7 2018-03-16 stsp accum_buf = malloc(max_size);
1224 e0ab43e7 2018-03-16 stsp if (accum_buf == NULL)
1225 0a585a0d 2018-03-17 stsp return got_error_from_errno();
1227 e0ab43e7 2018-03-16 stsp /* Deltas are ordered in ascending order. */
1228 e0ab43e7 2018-03-16 stsp SIMPLEQ_FOREACH(delta, &deltas->entries, entry) {
1229 e0ab43e7 2018-03-16 stsp if (n == 0) {
1230 72eb3431 2018-04-01 stsp struct got_pack *pack;
1231 e0ab43e7 2018-03-16 stsp size_t base_len;
1233 e0ab43e7 2018-03-16 stsp /* Plain object types are the delta base. */
1234 e0ab43e7 2018-03-16 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1235 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1236 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1237 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1238 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1239 72eb3431 2018-04-01 stsp goto done;
1242 72eb3431 2018-04-01 stsp pack = get_cached_pack(delta->path_packfile, repo);
1243 72eb3431 2018-04-01 stsp if (pack == NULL) {
1244 e0ab43e7 2018-03-16 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1245 e0ab43e7 2018-03-16 stsp goto done;
1248 f7e127f3 2018-03-17 stsp if (fseeko(pack->packfile, delta->offset + delta->tslen,
1249 e0ab43e7 2018-03-16 stsp SEEK_SET) != 0) {
1250 e0ab43e7 2018-03-16 stsp err = got_error_from_errno();
1251 e0ab43e7 2018-03-16 stsp goto done;
1253 e0ab43e7 2018-03-16 stsp err = got_inflate_to_mem(&base_buf, &base_len,
1254 f7e127f3 2018-03-17 stsp pack->packfile);
1255 e0ab43e7 2018-03-16 stsp if (base_len < max_size) {
1256 e0ab43e7 2018-03-16 stsp uint8_t *p;
1257 e0ab43e7 2018-03-16 stsp p = reallocarray(base_buf, 1, max_size);
1258 e0ab43e7 2018-03-16 stsp if (p == NULL) {
1259 0a585a0d 2018-03-17 stsp err = got_error_from_errno();
1260 e0ab43e7 2018-03-16 stsp goto done;
1262 e0ab43e7 2018-03-16 stsp base_buf = p;
1265 e0ab43e7 2018-03-16 stsp goto done;
1270 a53d2f13 2018-03-17 stsp err = got_delta_apply_in_mem(base_buf, delta->delta_buf,
1271 a53d2f13 2018-03-17 stsp delta->delta_len, accum_buf, &accum_size);
1274 e0ab43e7 2018-03-16 stsp goto done;
1276 e0ab43e7 2018-03-16 stsp if (n < deltas->nentries) {
1277 e0ab43e7 2018-03-16 stsp /* Accumulated delta becomes the new base. */
1278 e0ab43e7 2018-03-16 stsp uint8_t *tmp = accum_buf;
1279 e0ab43e7 2018-03-16 stsp accum_buf = base_buf;
1280 e0ab43e7 2018-03-16 stsp base_buf = tmp;
1285 e0ab43e7 2018-03-16 stsp free(base_buf);
1286 e0ab43e7 2018-03-16 stsp if (err) {
1287 e0ab43e7 2018-03-16 stsp free(accum_buf);
1288 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1289 e0ab43e7 2018-03-16 stsp *outlen = 0;
1291 e0ab43e7 2018-03-16 stsp *outbuf = accum_buf;
1292 e0ab43e7 2018-03-16 stsp *outlen = accum_size;
1294 efd2a263 2018-01-19 stsp return err;
1297 3ee5fc21 2018-01-17 stsp const struct got_error *
1298 3ee5fc21 2018-01-17 stsp got_packfile_extract_object(FILE **f, struct got_object *obj,
1299 3ee5fc21 2018-01-17 stsp struct got_repository *repo)
1301 3ee5fc21 2018-01-17 stsp const struct got_error *err = NULL;
1303 3ee5fc21 2018-01-17 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1304 3ee5fc21 2018-01-17 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1306 040bf4a1 2018-04-01 stsp *f = got_opentemp();
1307 040bf4a1 2018-04-01 stsp if (*f == NULL) {
1308 040bf4a1 2018-04-01 stsp err = got_error(GOT_ERR_FILE_OPEN);
1309 040bf4a1 2018-04-01 stsp goto done;
1312 ef2bccd9 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1313 72eb3431 2018-04-01 stsp struct got_pack *pack;
1315 72eb3431 2018-04-01 stsp pack = get_cached_pack(obj->path_packfile, repo);
1316 72eb3431 2018-04-01 stsp if (pack == NULL) {
1317 72eb3431 2018-04-01 stsp err = cache_pack(&pack, obj->path_packfile, NULL, repo);
1319 72eb3431 2018-04-01 stsp goto done;
1322 7e656b93 2018-03-17 stsp if (fseeko(pack->packfile, obj->pack_offset, SEEK_SET) != 0) {
1323 6691714a 2018-01-23 stsp err = got_error_from_errno();
1324 c52ac529 2018-03-17 stsp goto done;
1327 7e656b93 2018-03-17 stsp err = got_inflate_to_file(&obj->size, pack->packfile, *f);
1329 b29656e2 2018-03-16 stsp err = dump_delta_chain_to_file(&obj->size, &obj->deltas, *f,
1332 d0f3be7c 2018-03-17 stsp if (err && *f) {
1333 3ee5fc21 2018-01-17 stsp fclose(*f);
1334 d0f3be7c 2018-03-17 stsp *f = NULL;
1336 a1fd68d8 2018-01-12 stsp return err;
1339 e0ab43e7 2018-03-16 stsp const struct got_error *
1340 e0ab43e7 2018-03-16 stsp got_packfile_extract_object_to_mem(uint8_t **buf, size_t *len,
1341 e0ab43e7 2018-03-16 stsp struct got_object *obj, struct got_repository *repo)
1343 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1345 e0ab43e7 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1346 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1348 ef2bccd9 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1349 72eb3431 2018-04-01 stsp struct got_pack *pack;
1351 72eb3431 2018-04-01 stsp pack = get_cached_pack(obj->path_packfile, repo);
1352 72eb3431 2018-04-01 stsp if (pack == NULL) {
1353 72eb3431 2018-04-01 stsp err = cache_pack(&pack, obj->path_packfile, NULL, repo);
1355 72eb3431 2018-04-01 stsp goto done;
1358 7e656b93 2018-03-17 stsp if (fseeko(pack->packfile, obj->pack_offset, SEEK_SET) != 0) {
1359 e0ab43e7 2018-03-16 stsp err = got_error_from_errno();
1360 e0ab43e7 2018-03-16 stsp goto done;
1363 7e656b93 2018-03-17 stsp err = got_inflate_to_mem(buf, len, pack->packfile);
1365 72eb3431 2018-04-01 stsp err = dump_delta_chain_to_mem(buf, len, &obj->deltas, repo);
1367 e0ab43e7 2018-03-16 stsp return err;
