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 dfb54902 2018-04-02 stsp memcpy(p->sorted_ids, packidx->sorted_ids,
357 dfb54902 2018-04-02 stsp nobj * sizeof(*p->sorted_ids));
359 79b11c62 2018-03-09 stsp p->crc32 = calloc(nobj, sizeof(*p->crc32));
360 79b11c62 2018-03-09 stsp if (p->crc32 == NULL)
362 79b11c62 2018-03-09 stsp memcpy(p->crc32, packidx->crc32, nobj * sizeof(*p->crc32));
364 79b11c62 2018-03-09 stsp p->offsets = calloc(nobj, sizeof(*p->offsets));
365 79b11c62 2018-03-09 stsp if (p->offsets == NULL)
367 79b11c62 2018-03-09 stsp memcpy(p->offsets, packidx->offsets, nobj * sizeof(*p->offsets));
369 79b11c62 2018-03-09 stsp if (p->large_offsets) {
370 79b11c62 2018-03-09 stsp p->large_offsets = calloc(nobj, sizeof(*p->large_offsets));
371 79b11c62 2018-03-09 stsp if (p->large_offsets == NULL)
373 79b11c62 2018-03-09 stsp memcpy(p->large_offsets, packidx->large_offsets,
374 79b11c62 2018-03-09 stsp nobj * sizeof(*p->large_offsets));
380 79b11c62 2018-03-09 stsp free(p->large_offsets);
381 79b11c62 2018-03-09 stsp free(p->offsets);
382 79b11c62 2018-03-09 stsp free(p->crc32);
383 79b11c62 2018-03-09 stsp free(p->sorted_ids);
385 79b11c62 2018-03-09 stsp return NULL;
388 65cf1e80 2018-03-16 stsp static void
389 65cf1e80 2018-03-16 stsp cache_packidx(struct got_packidx_v2_hdr *packidx, struct got_repository *repo)
393 65cf1e80 2018-03-16 stsp for (i = 0; i < nitems(repo->packidx_cache); i++) {
394 65cf1e80 2018-03-16 stsp if (repo->packidx_cache[i] == NULL)
398 65cf1e80 2018-03-16 stsp if (i == nitems(repo->packidx_cache)) {
399 65cf1e80 2018-03-16 stsp got_packidx_close(repo->packidx_cache[i - 1]);
400 65cf1e80 2018-03-16 stsp memmove(&repo->packidx_cache[1], &repo->packidx_cache[0],
401 65cf1e80 2018-03-16 stsp sizeof(repo->packidx_cache) -
402 65cf1e80 2018-03-16 stsp sizeof(repo->packidx_cache[0]));
406 65cf1e80 2018-03-16 stsp repo->packidx_cache[i] = dup_packidx(packidx);
409 6b9c9673 2018-01-23 stsp static const struct got_error *
410 6b9c9673 2018-01-23 stsp search_packidx(struct got_packidx_v2_hdr **packidx, int *idx,
411 6b9c9673 2018-01-23 stsp struct got_repository *repo, struct got_object_id *id)
413 6b9c9673 2018-01-23 stsp const struct got_error *err;
414 6b9c9673 2018-01-23 stsp char *path_packdir;
415 6b9c9673 2018-01-23 stsp DIR *packdir;
416 6b9c9673 2018-01-23 stsp struct dirent *dent;
417 6b9c9673 2018-01-23 stsp char *path_packidx;
420 65cf1e80 2018-03-16 stsp /* Search pack index cache. */
421 65cf1e80 2018-03-16 stsp for (i = 0; i < nitems(repo->packidx_cache); i++) {
422 65cf1e80 2018-03-16 stsp if (repo->packidx_cache[i] == NULL)
424 72eb3431 2018-04-01 stsp *idx = get_object_idx(repo->packidx_cache[i], id, repo);
425 79b11c62 2018-03-09 stsp if (*idx != -1) {
426 6bb255dc 2018-03-17 stsp *packidx = repo->packidx_cache[i];
427 79b11c62 2018-03-09 stsp return NULL;
430 79b11c62 2018-03-09 stsp /* No luck. Search the filesystem. */
432 6b9c9673 2018-01-23 stsp path_packdir = got_repo_get_path_objects_pack(repo);
433 6b9c9673 2018-01-23 stsp if (path_packdir == NULL)
434 0a585a0d 2018-03-17 stsp return got_error_from_errno();
436 6b9c9673 2018-01-23 stsp packdir = opendir(path_packdir);
437 6b9c9673 2018-01-23 stsp if (packdir == NULL) {
438 6b9c9673 2018-01-23 stsp err = got_error_from_errno();
442 6b9c9673 2018-01-23 stsp while ((dent = readdir(packdir)) != NULL) {
443 6b9c9673 2018-01-23 stsp if (!is_packidx_filename(dent->d_name, dent->d_namlen))
446 6b9c9673 2018-01-23 stsp if (asprintf(&path_packidx, "%s/%s", path_packdir,
447 6b9c9673 2018-01-23 stsp dent->d_name) == -1) {
448 0a585a0d 2018-03-17 stsp err = got_error_from_errno();
452 6b9c9673 2018-01-23 stsp err = got_packidx_open(packidx, path_packidx);
453 6b9c9673 2018-01-23 stsp free(path_packidx);
457 72eb3431 2018-04-01 stsp *idx = get_object_idx(*packidx, id, repo);
458 6b9c9673 2018-01-23 stsp if (*idx != -1) {
459 6b9c9673 2018-01-23 stsp err = NULL; /* found the object */
460 65cf1e80 2018-03-16 stsp cache_packidx(*packidx, repo);
464 6b9c9673 2018-01-23 stsp got_packidx_close(*packidx);
465 6b9c9673 2018-01-23 stsp *packidx = NULL;
468 6b9c9673 2018-01-23 stsp err = got_error(GOT_ERR_NO_OBJ);
470 6b9c9673 2018-01-23 stsp free(path_packdir);
471 ef715580 2018-01-26 stsp if (packdir && closedir(packdir) != 0 && err == 0)
472 6b9c9673 2018-01-23 stsp err = got_error_from_errno();
473 6b9c9673 2018-01-23 stsp return err;
476 c7fe698a 2018-01-23 stsp static const struct got_error *
477 65cf1e80 2018-03-16 stsp get_packfile_path(char **path_packfile, struct got_repository *repo,
478 65cf1e80 2018-03-16 stsp struct got_packidx_v2_hdr *packidx)
480 65cf1e80 2018-03-16 stsp char *path_packdir;
481 65cf1e80 2018-03-16 stsp char hex[SHA1_DIGEST_STRING_LENGTH];
482 65cf1e80 2018-03-16 stsp char *sha1str;
484 65cf1e80 2018-03-16 stsp path_packdir = got_repo_get_path_objects_pack(repo);
485 65cf1e80 2018-03-16 stsp if (path_packdir == NULL)
486 0a585a0d 2018-03-17 stsp return got_error_from_errno();
488 65cf1e80 2018-03-16 stsp sha1str = got_sha1_digest_to_str(packidx->trailer.packfile_sha1,
489 65cf1e80 2018-03-16 stsp hex, sizeof(hex));
490 65cf1e80 2018-03-16 stsp if (sha1str == NULL)
491 65cf1e80 2018-03-16 stsp return got_error(GOT_ERR_PACKIDX_CSUM);
493 65cf1e80 2018-03-16 stsp if (asprintf(path_packfile, "%s/%s%s%s", path_packdir,
494 65cf1e80 2018-03-16 stsp GOT_PACK_PREFIX, sha1str, GOT_PACKFILE_SUFFIX) == -1) {
495 65cf1e80 2018-03-16 stsp *path_packfile = NULL;
496 0a585a0d 2018-03-17 stsp return got_error_from_errno();
499 65cf1e80 2018-03-16 stsp return NULL;
502 65cf1e80 2018-03-16 stsp const struct got_error *
503 65cf1e80 2018-03-16 stsp read_packfile_hdr(FILE *f, struct got_packidx_v2_hdr *packidx)
505 65cf1e80 2018-03-16 stsp const struct got_error *err = NULL;
506 65cf1e80 2018-03-16 stsp uint32_t totobj = betoh32(packidx->fanout_table[0xff]);
507 65cf1e80 2018-03-16 stsp struct got_packfile_hdr hdr;
510 65cf1e80 2018-03-16 stsp n = fread(&hdr, sizeof(hdr), 1, f);
511 65cf1e80 2018-03-16 stsp if (n != 1)
512 65cf1e80 2018-03-16 stsp return got_ferror(f, GOT_ERR_BAD_PACKIDX);
514 65cf1e80 2018-03-16 stsp if (betoh32(hdr.signature) != GOT_PACKFILE_SIGNATURE ||
515 65cf1e80 2018-03-16 stsp betoh32(hdr.version) != GOT_PACKFILE_VERSION ||
516 65cf1e80 2018-03-16 stsp betoh32(hdr.nobjects) != totobj)
517 65cf1e80 2018-03-16 stsp err = got_error(GOT_ERR_BAD_PACKFILE);
519 65cf1e80 2018-03-16 stsp return err;
522 7e656b93 2018-03-17 stsp static const struct got_error *
523 7e656b93 2018-03-17 stsp open_packfile(FILE **packfile, const char *path_packfile,
524 7e656b93 2018-03-17 stsp struct got_repository *repo, struct got_packidx_v2_hdr *packidx)
526 7e656b93 2018-03-17 stsp const struct got_error *err = NULL;
528 7e656b93 2018-03-17 stsp *packfile = NULL;
530 7e656b93 2018-03-17 stsp *packfile = fopen(path_packfile, "rb");
531 7e656b93 2018-03-17 stsp if (*packfile == NULL) {
532 7e656b93 2018-03-17 stsp err = got_error_from_errno();
533 7e656b93 2018-03-17 stsp return err;
536 7e656b93 2018-03-17 stsp if (packidx) {
537 7e656b93 2018-03-17 stsp err = read_packfile_hdr(*packfile, packidx);
539 7e656b93 2018-03-17 stsp fclose(*packfile);
540 7e656b93 2018-03-17 stsp *packfile = NULL;
543 7e656b93 2018-03-17 stsp return err;
547 7e656b93 2018-03-17 stsp got_pack_close(struct got_pack *pack)
549 4589e373 2018-03-17 stsp fclose(pack->packfile);
550 4589e373 2018-03-17 stsp pack->packfile = NULL;
551 4589e373 2018-03-17 stsp free(pack->path_packfile);
552 4589e373 2018-03-17 stsp pack->path_packfile = NULL;
553 4589e373 2018-03-17 stsp pack->filesize = 0;
556 7e656b93 2018-03-17 stsp static const struct got_error *
557 7e656b93 2018-03-17 stsp cache_pack(struct got_pack **packp, const char *path_packfile,
558 7e656b93 2018-03-17 stsp struct got_packidx_v2_hdr *packidx, struct got_repository *repo)
560 7e656b93 2018-03-17 stsp const struct got_error *err = NULL;
561 7e656b93 2018-03-17 stsp struct got_pack *pack = NULL;
565 7e656b93 2018-03-17 stsp *packp = NULL;
567 7e656b93 2018-03-17 stsp for (i = 0; i < nitems(repo->packs); i++) {
568 7e656b93 2018-03-17 stsp pack = &repo->packs[i];
569 7e656b93 2018-03-17 stsp if (pack->path_packfile == NULL)
571 7e656b93 2018-03-17 stsp if (strcmp(pack->path_packfile, path_packfile) == 0)
572 7e656b93 2018-03-17 stsp return NULL;
575 7e656b93 2018-03-17 stsp if (i == nitems(repo->packs) - 1) {
576 7e656b93 2018-03-17 stsp got_pack_close(&repo->packs[i - 1]);
577 7e656b93 2018-03-17 stsp memmove(&repo->packs[1], &repo->packs[0],
578 7e656b93 2018-03-17 stsp sizeof(repo->packs) - sizeof(repo->packs[0]));
582 7e656b93 2018-03-17 stsp pack = &repo->packs[i];
584 7e656b93 2018-03-17 stsp pack->path_packfile = strdup(path_packfile);
585 7e656b93 2018-03-17 stsp if (pack->path_packfile == NULL) {
586 0a585a0d 2018-03-17 stsp err = got_error_from_errno();
590 7e656b93 2018-03-17 stsp err = open_packfile(&pack->packfile, path_packfile, repo, packidx);
594 7e656b93 2018-03-17 stsp err = get_packfile_size(&pack->filesize, path_packfile);
598 7e656b93 2018-03-17 stsp free(pack->path_packfile);
599 7e656b93 2018-03-17 stsp free(pack);
600 7e656b93 2018-03-17 stsp } else if (packp)
601 7e656b93 2018-03-17 stsp *packp = pack;
602 c7fe698a 2018-01-23 stsp return err;
605 7e656b93 2018-03-17 stsp struct got_pack *
606 7e656b93 2018-03-17 stsp get_cached_pack(const char *path_packfile, struct got_repository *repo)
608 7e656b93 2018-03-17 stsp struct got_pack *pack = NULL;
611 7e656b93 2018-03-17 stsp for (i = 0; i < nitems(repo->packs); i++) {
612 7e656b93 2018-03-17 stsp pack = &repo->packs[i];
613 7e656b93 2018-03-17 stsp if (pack->path_packfile == NULL)
615 7e656b93 2018-03-17 stsp if (strcmp(pack->path_packfile, path_packfile) == 0)
616 7e656b93 2018-03-17 stsp return pack;
619 7e656b93 2018-03-17 stsp return NULL;
622 c7fe698a 2018-01-23 stsp static const struct got_error *
623 348f621c 2018-01-23 stsp parse_object_type_and_size(uint8_t *type, uint64_t *size, size_t *len,
624 c3703302 2018-01-23 stsp FILE *packfile)
626 a487c1d0 2018-01-14 stsp uint8_t t = 0;
627 a487c1d0 2018-01-14 stsp uint64_t s = 0;
628 a487c1d0 2018-01-14 stsp uint8_t sizeN;
633 a1fd68d8 2018-01-12 stsp /* We do not support size values which don't fit in 64 bit. */
635 a487c1d0 2018-01-14 stsp return got_error(GOT_ERR_NO_SPACE);
637 a1fd68d8 2018-01-12 stsp n = fread(&sizeN, sizeof(sizeN), 1, packfile);
638 a487c1d0 2018-01-14 stsp if (n != 1)
639 a487c1d0 2018-01-14 stsp return got_ferror(packfile, GOT_ERR_BAD_PACKIDX);
641 a1fd68d8 2018-01-12 stsp if (i == 0) {
642 a487c1d0 2018-01-14 stsp t = (sizeN & GOT_PACK_OBJ_SIZE0_TYPE_MASK) >>
643 a1fd68d8 2018-01-12 stsp GOT_PACK_OBJ_SIZE0_TYPE_MASK_SHIFT;
644 a487c1d0 2018-01-14 stsp s = (sizeN & GOT_PACK_OBJ_SIZE0_VAL_MASK);
646 a1fd68d8 2018-01-12 stsp size_t shift = 4 + 7 * (i - 1);
647 a487c1d0 2018-01-14 stsp s |= ((sizeN & GOT_PACK_OBJ_SIZE_VAL_MASK) << shift);
650 a1fd68d8 2018-01-12 stsp } while (sizeN & GOT_PACK_OBJ_SIZE_MORE);
654 3ee5fc21 2018-01-17 stsp *len = i * sizeof(sizeN);
655 a487c1d0 2018-01-14 stsp return NULL;
658 a1fd68d8 2018-01-12 stsp static const struct got_error *
659 9710aac2 2018-01-19 stsp open_plain_object(struct got_object **obj, const char *path_packfile,
660 6ccb713b 2018-01-19 stsp struct got_object_id *id, uint8_t type, off_t offset, size_t size)
662 6ccb713b 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
663 6ccb713b 2018-01-19 stsp if (*obj == NULL)
664 0a585a0d 2018-03-17 stsp return got_error_from_errno();
666 6ccb713b 2018-01-19 stsp (*obj)->path_packfile = strdup(path_packfile);
667 6ccb713b 2018-01-19 stsp if ((*obj)->path_packfile == NULL) {
668 0a585a0d 2018-03-17 stsp const struct got_error *err = got_error_from_errno();
669 6ccb713b 2018-01-19 stsp free(*obj);
670 6ccb713b 2018-01-19 stsp *obj = NULL;
671 0a585a0d 2018-03-17 stsp return err;
674 6ccb713b 2018-01-19 stsp (*obj)->type = type;
675 6ccb713b 2018-01-19 stsp (*obj)->flags = GOT_OBJ_FLAG_PACKED;
676 6ccb713b 2018-01-19 stsp (*obj)->hdrlen = 0;
677 6ccb713b 2018-01-19 stsp (*obj)->size = size;
678 6ccb713b 2018-01-19 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
679 6ccb713b 2018-01-19 stsp (*obj)->pack_offset = offset;
681 b107e67f 2018-01-19 stsp return NULL;
684 b107e67f 2018-01-19 stsp static const struct got_error *
685 348f621c 2018-01-23 stsp parse_negative_offset(int64_t *offset, size_t *len, FILE *packfile)
687 b107e67f 2018-01-19 stsp int64_t o = 0;
688 b107e67f 2018-01-19 stsp uint8_t offN;
693 b107e67f 2018-01-19 stsp /* We do not support offset values which don't fit in 64 bit. */
695 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_NO_SPACE);
697 b107e67f 2018-01-19 stsp n = fread(&offN, sizeof(offN), 1, packfile);
698 b107e67f 2018-01-19 stsp if (n != 1)
699 b107e67f 2018-01-19 stsp return got_ferror(packfile, GOT_ERR_BAD_PACKIDX);
701 b107e67f 2018-01-19 stsp if (i == 0)
702 b107e67f 2018-01-19 stsp o = (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
706 cecc778e 2018-01-23 stsp o += (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
709 b107e67f 2018-01-19 stsp } while (offN & GOT_PACK_OBJ_DELTA_OFF_MORE);
711 b107e67f 2018-01-19 stsp *offset = o;
712 b107e67f 2018-01-19 stsp *len = i * sizeof(offN);
713 6ccb713b 2018-01-19 stsp return NULL;
716 6ccb713b 2018-01-19 stsp static const struct got_error *
717 96f5e8b3 2018-01-23 stsp parse_offset_delta(off_t *base_offset, FILE *packfile, off_t offset)
719 96f5e8b3 2018-01-23 stsp const struct got_error *err;
720 b107e67f 2018-01-19 stsp int64_t negoffset;
721 b107e67f 2018-01-19 stsp size_t negofflen;
723 348f621c 2018-01-23 stsp err = parse_negative_offset(&negoffset, &negofflen, packfile);
725 b107e67f 2018-01-19 stsp return err;
727 b107e67f 2018-01-19 stsp /* Compute the base object's offset (must be in the same pack file). */
728 96f5e8b3 2018-01-23 stsp *base_offset = (offset - negoffset);
729 96f5e8b3 2018-01-23 stsp if (*base_offset <= 0)
730 b107e67f 2018-01-19 stsp return got_error(GOT_ERR_BAD_PACKFILE);
732 96f5e8b3 2018-01-23 stsp return NULL;
735 0e22967e 2018-02-11 stsp static const struct got_error *
736 0e22967e 2018-02-11 stsp resolve_delta_chain(struct got_delta_chain *, struct got_repository *,
737 0e22967e 2018-02-11 stsp FILE *, const char *, off_t, size_t, int, size_t);
739 96f5e8b3 2018-01-23 stsp static const struct got_error *
740 bdd2fbb3 2018-02-11 stsp add_delta(struct got_delta_chain *deltas, const char *path_packfile,
741 bdd2fbb3 2018-02-11 stsp off_t delta_offset, size_t tslen, int delta_type, size_t delta_size,
742 a53d2f13 2018-03-17 stsp size_t delta_data_offset, uint8_t *delta_buf, size_t delta_len)
744 bdd2fbb3 2018-02-11 stsp struct got_delta *delta;
746 bdd2fbb3 2018-02-11 stsp delta = got_delta_open(path_packfile, delta_offset, tslen,
747 a53d2f13 2018-03-17 stsp delta_type, delta_size, delta_data_offset, delta_buf,
748 a53d2f13 2018-03-17 stsp delta_len);
749 bdd2fbb3 2018-02-11 stsp if (delta == NULL)
750 0a585a0d 2018-03-17 stsp return got_error_from_errno();
751 bdd2fbb3 2018-02-11 stsp /* delta is freed in got_object_close() */
752 bdd2fbb3 2018-02-11 stsp deltas->nentries++;
753 bdd2fbb3 2018-02-11 stsp SIMPLEQ_INSERT_HEAD(&deltas->entries, delta, entry);
754 bdd2fbb3 2018-02-11 stsp return NULL;
757 bdd2fbb3 2018-02-11 stsp static const struct got_error *
758 6b9c9673 2018-01-23 stsp resolve_offset_delta(struct got_delta_chain *deltas,
759 6b9c9673 2018-01-23 stsp struct got_repository *repo, FILE *packfile, const char *path_packfile,
760 bdd2fbb3 2018-02-11 stsp off_t delta_offset,size_t tslen, int delta_type, size_t delta_size)
763 a3500804 2018-01-23 stsp const struct got_error *err;
764 c3703302 2018-01-23 stsp off_t base_offset;
765 c3703302 2018-01-23 stsp uint8_t base_type;
766 c3703302 2018-01-23 stsp uint64_t base_size;
767 c3703302 2018-01-23 stsp size_t base_tslen;
768 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
769 a53d2f13 2018-03-17 stsp uint8_t *delta_buf;
770 a53d2f13 2018-03-17 stsp size_t delta_len;
772 c3703302 2018-01-23 stsp err = parse_offset_delta(&base_offset, packfile, delta_offset);
774 a3500804 2018-01-23 stsp return err;
776 bdd2fbb3 2018-02-11 stsp delta_data_offset = ftello(packfile);
777 bdd2fbb3 2018-02-11 stsp if (delta_data_offset == -1)
778 bdd2fbb3 2018-02-11 stsp return got_error_from_errno();
780 a53d2f13 2018-03-17 stsp err = got_inflate_to_mem(&delta_buf, &delta_len, packfile);
782 a53d2f13 2018-03-17 stsp return err;
784 bdd2fbb3 2018-02-11 stsp err = add_delta(deltas, path_packfile, delta_offset, tslen,
785 a53d2f13 2018-03-17 stsp delta_type, delta_size, delta_data_offset, delta_buf, delta_len);
787 bdd2fbb3 2018-02-11 stsp return err;
789 c3703302 2018-01-23 stsp /* An offset delta must be in the same packfile. */
790 c3703302 2018-01-23 stsp if (fseeko(packfile, base_offset, SEEK_SET) != 0)
791 b107e67f 2018-01-19 stsp return got_error_from_errno();
793 348f621c 2018-01-23 stsp err = parse_object_type_and_size(&base_type, &base_size, &base_tslen,
796 b107e67f 2018-01-19 stsp return err;
798 6b9c9673 2018-01-23 stsp return resolve_delta_chain(deltas, repo, packfile, path_packfile,
799 0e22967e 2018-02-11 stsp base_offset, base_tslen, base_type, base_size);
802 c3703302 2018-01-23 stsp static const struct got_error *
803 6b9c9673 2018-01-23 stsp resolve_ref_delta(struct got_delta_chain *deltas, struct got_repository *repo,
804 bdd2fbb3 2018-02-11 stsp FILE *packfile, const char *path_packfile, off_t delta_offset,
805 bdd2fbb3 2018-02-11 stsp size_t tslen, int delta_type, size_t delta_size)
807 6b9c9673 2018-01-23 stsp const struct got_error *err;
808 6b9c9673 2018-01-23 stsp struct got_object_id id;
809 6b9c9673 2018-01-23 stsp struct got_packidx_v2_hdr *packidx;
811 6b9c9673 2018-01-23 stsp off_t base_offset;
812 6b9c9673 2018-01-23 stsp uint8_t base_type;
813 6b9c9673 2018-01-23 stsp uint64_t base_size;
814 6b9c9673 2018-01-23 stsp size_t base_tslen;
816 65cf1e80 2018-03-16 stsp char *path_base_packfile;
817 999f19f6 2018-03-17 stsp struct got_pack *base_pack;
818 bdd2fbb3 2018-02-11 stsp off_t delta_data_offset;
819 a53d2f13 2018-03-17 stsp uint8_t *delta_buf;
820 a53d2f13 2018-03-17 stsp size_t delta_len;
822 6b9c9673 2018-01-23 stsp n = fread(&id, sizeof(id), 1, packfile);
823 6b9c9673 2018-01-23 stsp if (n != 1)
824 6b9c9673 2018-01-23 stsp return got_ferror(packfile, GOT_ERR_IO);
826 bdd2fbb3 2018-02-11 stsp delta_data_offset = ftello(packfile);
827 bdd2fbb3 2018-02-11 stsp if (delta_data_offset == -1)
828 bdd2fbb3 2018-02-11 stsp return got_error_from_errno();
830 a53d2f13 2018-03-17 stsp err = got_inflate_to_mem(&delta_buf, &delta_len, packfile);
832 a53d2f13 2018-03-17 stsp return err;
834 bdd2fbb3 2018-02-11 stsp err = add_delta(deltas, path_packfile, delta_offset, tslen,
835 a53d2f13 2018-03-17 stsp delta_type, delta_size, delta_data_offset, delta_buf, delta_len);
837 bdd2fbb3 2018-02-11 stsp return err;
839 6b9c9673 2018-01-23 stsp err = search_packidx(&packidx, &idx, repo, &id);
841 6b9c9673 2018-01-23 stsp return err;
843 6b9c9673 2018-01-23 stsp base_offset = get_object_offset(packidx, idx);
844 6b9c9673 2018-01-23 stsp if (base_offset == (uint64_t)-1) {
845 6b9c9673 2018-01-23 stsp return got_error(GOT_ERR_BAD_PACKIDX);
848 7e656b93 2018-03-17 stsp err = get_packfile_path(&path_base_packfile, repo, packidx);
850 7e656b93 2018-03-17 stsp return err;
852 999f19f6 2018-03-17 stsp base_pack = get_cached_pack(path_base_packfile, repo);
853 999f19f6 2018-03-17 stsp if (base_pack == NULL) {
854 999f19f6 2018-03-17 stsp err = cache_pack(&base_pack, path_base_packfile, NULL, repo);
859 999f19f6 2018-03-17 stsp if (fseeko(base_pack->packfile, base_offset, SEEK_SET) != 0) {
860 6b9c9673 2018-01-23 stsp err = got_error_from_errno();
864 6b9c9673 2018-01-23 stsp err = parse_object_type_and_size(&base_type, &base_size, &base_tslen,
865 999f19f6 2018-03-17 stsp base_pack->packfile);
869 999f19f6 2018-03-17 stsp err = resolve_delta_chain(deltas, repo, base_pack->packfile,
870 0e22967e 2018-02-11 stsp path_base_packfile, base_offset, base_tslen, base_type,
871 0e22967e 2018-02-11 stsp base_size);
873 65cf1e80 2018-03-16 stsp free(path_base_packfile);
874 6b9c9673 2018-01-23 stsp return err;
877 6b9c9673 2018-01-23 stsp static const struct got_error *
878 6b9c9673 2018-01-23 stsp resolve_delta_chain(struct got_delta_chain *deltas, struct got_repository *repo,
879 0e22967e 2018-02-11 stsp FILE *packfile, const char *path_packfile, off_t delta_offset, size_t tslen,
880 0e22967e 2018-02-11 stsp int delta_type, size_t delta_size)
882 c3703302 2018-01-23 stsp const struct got_error *err = NULL;
884 c3703302 2018-01-23 stsp switch (delta_type) {
885 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_COMMIT:
886 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TREE:
887 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_BLOB:
888 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_TAG:
889 c3703302 2018-01-23 stsp /* Plain types are the final delta base. Recursion ends. */
890 bdd2fbb3 2018-02-11 stsp err = add_delta(deltas, path_packfile, delta_offset, tslen,
891 a53d2f13 2018-03-17 stsp delta_type, delta_size, 0, NULL, 0);
893 a3500804 2018-01-23 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
894 6b9c9673 2018-01-23 stsp err = resolve_offset_delta(deltas, repo, packfile,
895 bdd2fbb3 2018-02-11 stsp path_packfile, delta_offset, tslen, delta_type,
896 bdd2fbb3 2018-02-11 stsp delta_size);
898 4e8cda55 2018-01-19 stsp case GOT_OBJ_TYPE_REF_DELTA:
899 bdd2fbb3 2018-02-11 stsp err = resolve_ref_delta(deltas, repo, packfile,
900 bdd2fbb3 2018-02-11 stsp path_packfile, delta_offset, tslen, delta_type,
901 bdd2fbb3 2018-02-11 stsp delta_size);
904 4810de4a 2018-04-01 stsp return got_error(GOT_ERR_OBJ_TYPE);
907 96f5e8b3 2018-01-23 stsp return err;
910 96f5e8b3 2018-01-23 stsp static const struct got_error *
911 a48db7e5 2018-01-23 stsp open_delta_object(struct got_object **obj, struct got_repository *repo,
912 a48db7e5 2018-01-23 stsp struct got_packidx_v2_hdr *packidx, const char *path_packfile,
913 a48db7e5 2018-01-23 stsp FILE *packfile, struct got_object_id *id, off_t offset, size_t tslen,
914 a48db7e5 2018-01-23 stsp int delta_type, size_t delta_size)
916 96f5e8b3 2018-01-23 stsp const struct got_error *err = NULL;
917 96f5e8b3 2018-01-23 stsp int resolved_type;
919 b107e67f 2018-01-19 stsp *obj = calloc(1, sizeof(**obj));
920 b107e67f 2018-01-19 stsp if (*obj == NULL)
921 0a585a0d 2018-03-17 stsp return got_error_from_errno();
923 96f5e8b3 2018-01-23 stsp (*obj)->flags = 0;
924 b107e67f 2018-01-19 stsp (*obj)->hdrlen = 0;
925 39e73dc9 2018-03-03 stsp (*obj)->size = 0; /* Not known because deltas aren't applied yet. */
926 b107e67f 2018-01-19 stsp memcpy(&(*obj)->id, id, sizeof((*obj)->id));
927 cecc778e 2018-01-23 stsp (*obj)->pack_offset = offset + tslen;
929 96f5e8b3 2018-01-23 stsp (*obj)->path_packfile = strdup(path_packfile);
930 96f5e8b3 2018-01-23 stsp if ((*obj)->path_packfile == NULL) {
931 0a585a0d 2018-03-17 stsp err = got_error_from_errno();
934 96f5e8b3 2018-01-23 stsp (*obj)->flags |= GOT_OBJ_FLAG_PACKED;
936 96f5e8b3 2018-01-23 stsp SIMPLEQ_INIT(&(*obj)->deltas.entries);
937 96f5e8b3 2018-01-23 stsp (*obj)->flags |= GOT_OBJ_FLAG_DELTIFIED;
939 6b9c9673 2018-01-23 stsp err = resolve_delta_chain(&(*obj)->deltas, repo, packfile,
940 0e22967e 2018-02-11 stsp path_packfile, offset, tslen, delta_type, delta_size);
944 96f5e8b3 2018-01-23 stsp err = got_delta_chain_get_base_type(&resolved_type, &(*obj)->deltas);
947 96f5e8b3 2018-01-23 stsp (*obj)->type = resolved_type;
951 96f5e8b3 2018-01-23 stsp got_object_close(*obj);
952 96f5e8b3 2018-01-23 stsp *obj = NULL;
954 96f5e8b3 2018-01-23 stsp return err;
957 b107e67f 2018-01-19 stsp static const struct got_error *
958 6c00b545 2018-01-17 stsp open_packed_object(struct got_object **obj, struct got_repository *repo,
959 6b9c9673 2018-01-23 stsp struct got_packidx_v2_hdr *packidx, int idx, struct got_object_id *id)
961 a1fd68d8 2018-01-12 stsp const struct got_error *err = NULL;
962 a1fd68d8 2018-01-12 stsp off_t offset;
963 65cf1e80 2018-03-16 stsp char *path_packfile;
964 6d89869a 2018-03-17 stsp struct got_pack *pack;
965 6c00b545 2018-01-17 stsp uint8_t type;
966 6c00b545 2018-01-17 stsp uint64_t size;
967 3ee5fc21 2018-01-17 stsp size_t tslen;
969 6c00b545 2018-01-17 stsp *obj = NULL;
971 a1fd68d8 2018-01-12 stsp offset = get_object_offset(packidx, idx);
972 a1fd68d8 2018-01-12 stsp if (offset == (uint64_t)-1)
973 a1fd68d8 2018-01-12 stsp return got_error(GOT_ERR_BAD_PACKIDX);
975 7e656b93 2018-03-17 stsp err = get_packfile_path(&path_packfile, repo, packidx);
977 6b9c9673 2018-01-23 stsp return err;
979 6d89869a 2018-03-17 stsp pack = get_cached_pack(path_packfile, repo);
980 6d89869a 2018-03-17 stsp if (pack == NULL) {
981 6d89869a 2018-03-17 stsp err = cache_pack(&pack, path_packfile, packidx, repo);
986 6d89869a 2018-03-17 stsp if (fseeko(pack->packfile, offset, SEEK_SET) != 0) {
987 6c00b545 2018-01-17 stsp err = got_error_from_errno();
991 6d89869a 2018-03-17 stsp err = parse_object_type_and_size(&type, &size, &tslen, pack->packfile);
995 6c00b545 2018-01-17 stsp switch (type) {
996 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_COMMIT:
997 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_TREE:
998 6c00b545 2018-01-17 stsp case GOT_OBJ_TYPE_BLOB:
999 d33fc9ef 2018-01-23 stsp case GOT_OBJ_TYPE_TAG:
1000 9710aac2 2018-01-19 stsp err = open_plain_object(obj, path_packfile, id, type,
1001 6ccb713b 2018-01-19 stsp offset + tslen, size);
1004 b107e67f 2018-01-19 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
1005 a48db7e5 2018-01-23 stsp case GOT_OBJ_TYPE_REF_DELTA:
1006 a48db7e5 2018-01-23 stsp err = open_delta_object(obj, repo, packidx, path_packfile,
1007 6d89869a 2018-03-17 stsp pack->packfile, id, offset, tslen, type, size);
1011 4810de4a 2018-04-01 stsp err = got_error(GOT_ERR_OBJ_TYPE);
1012 6c00b545 2018-01-17 stsp goto done;
1015 65cf1e80 2018-03-16 stsp free(path_packfile);
1016 a1fd68d8 2018-01-12 stsp return err;
1019 a1fd68d8 2018-01-12 stsp const struct got_error *
1020 6c00b545 2018-01-17 stsp got_packfile_open_object(struct got_object **obj, struct got_object_id *id,
1021 a1fd68d8 2018-01-12 stsp struct got_repository *repo)
1023 a1fd68d8 2018-01-12 stsp const struct got_error *err = NULL;
1024 6b9c9673 2018-01-23 stsp struct got_packidx_v2_hdr *packidx = NULL;
1027 6b9c9673 2018-01-23 stsp err = search_packidx(&packidx, &idx, repo, id);
1029 6b9c9673 2018-01-23 stsp return err;
1031 6b9c9673 2018-01-23 stsp err = open_packed_object(obj, repo, packidx, idx, id);
1033 7e656b93 2018-03-17 stsp return err;
1035 7e656b93 2018-03-17 stsp err = cache_pack(NULL, (*obj)->path_packfile, packidx, repo);
1036 3ee5fc21 2018-01-17 stsp return err;
1039 efd2a263 2018-01-19 stsp static const struct got_error *
1040 40426839 2018-03-17 stsp get_delta_chain_max_size(uint64_t *max_size, struct got_delta_chain *deltas)
1042 22484865 2018-03-13 stsp struct got_delta *delta;
1043 22484865 2018-03-13 stsp uint64_t base_size = 0, result_size = 0;
1045 22484865 2018-03-13 stsp *max_size = 0;
1046 22484865 2018-03-13 stsp SIMPLEQ_FOREACH(delta, &deltas->entries, entry) {
1047 22484865 2018-03-13 stsp /* Plain object types are the delta base. */
1048 22484865 2018-03-13 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1049 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1050 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1051 22484865 2018-03-13 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1052 22484865 2018-03-13 stsp const struct got_error *err;
1053 a53d2f13 2018-03-17 stsp err = got_delta_get_sizes(&base_size, &result_size,
1054 a53d2f13 2018-03-17 stsp delta->delta_buf, delta->delta_len);
1056 22484865 2018-03-13 stsp return err;
1058 22484865 2018-03-13 stsp base_size = delta->size;
1059 22484865 2018-03-13 stsp if (base_size > *max_size)
1060 22484865 2018-03-13 stsp *max_size = base_size;
1061 22484865 2018-03-13 stsp if (result_size > *max_size)
1062 22484865 2018-03-13 stsp *max_size = result_size;
1065 9feb4ff2 2018-03-14 stsp return NULL;
1068 22484865 2018-03-13 stsp static const struct got_error *
1069 b29656e2 2018-03-16 stsp dump_delta_chain_to_file(size_t *result_size, struct got_delta_chain *deltas,
1070 72eb3431 2018-04-01 stsp FILE *outfile, struct got_repository *repo)
1072 efd2a263 2018-01-19 stsp const struct got_error *err = NULL;
1073 6691714a 2018-01-23 stsp struct got_delta *delta;
1074 22484865 2018-03-13 stsp FILE *base_file = NULL, *accum_file = NULL;
1075 8628c62d 2018-03-15 stsp uint8_t *base_buf = NULL, *accum_buf = NULL;
1076 b29656e2 2018-03-16 stsp size_t accum_size = 0;
1077 22484865 2018-03-13 stsp uint64_t max_size;
1078 6691714a 2018-01-23 stsp int n = 0;
1080 b29656e2 2018-03-16 stsp *result_size = 0;
1082 710bb5ca 2018-01-23 stsp if (SIMPLEQ_EMPTY(&deltas->entries))
1083 6691714a 2018-01-23 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
1085 8628c62d 2018-03-15 stsp /* We process small enough files entirely in memory for speed. */
1086 40426839 2018-03-17 stsp err = get_delta_chain_max_size(&max_size, deltas);
1088 22484865 2018-03-13 stsp return err;
1089 8628c62d 2018-03-15 stsp if (max_size < GOT_DELTA_RESULT_SIZE_CACHED_MAX) {
1090 8628c62d 2018-03-15 stsp accum_buf = malloc(max_size);
1091 8628c62d 2018-03-15 stsp if (accum_buf == NULL)
1092 0a585a0d 2018-03-17 stsp return got_error_from_errno();
1094 22484865 2018-03-13 stsp base_file = got_opentemp();
1095 8628c62d 2018-03-15 stsp if (base_file == NULL)
1096 8628c62d 2018-03-15 stsp return got_error_from_errno();
1098 22484865 2018-03-13 stsp accum_file = got_opentemp();
1099 8628c62d 2018-03-15 stsp if (accum_file == NULL) {
1100 8628c62d 2018-03-15 stsp err = got_error_from_errno();
1101 8628c62d 2018-03-15 stsp fclose(base_file);
1102 8628c62d 2018-03-15 stsp return err;
1106 6691714a 2018-01-23 stsp /* Deltas are ordered in ascending order. */
1107 710bb5ca 2018-01-23 stsp SIMPLEQ_FOREACH(delta, &deltas->entries, entry) {
1108 a6b158cc 2018-02-11 stsp if (n == 0) {
1109 72eb3431 2018-04-01 stsp struct got_pack *pack;
1110 8628c62d 2018-03-15 stsp size_t base_len;
1112 a6b158cc 2018-02-11 stsp /* Plain object types are the delta base. */
1113 a6b158cc 2018-02-11 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1114 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1115 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1116 a6b158cc 2018-02-11 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1117 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1118 72eb3431 2018-04-01 stsp goto done;
1121 72eb3431 2018-04-01 stsp pack = get_cached_pack(delta->path_packfile, repo);
1122 72eb3431 2018-04-01 stsp if (pack == NULL) {
1123 a6b158cc 2018-02-11 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1124 a6b158cc 2018-02-11 stsp goto done;
1127 f7e127f3 2018-03-17 stsp if (fseeko(pack->packfile, delta->offset + delta->tslen,
1128 bdd2fbb3 2018-02-11 stsp SEEK_SET) != 0) {
1129 bdd2fbb3 2018-02-11 stsp err = got_error_from_errno();
1130 bdd2fbb3 2018-02-11 stsp goto done;
1132 8628c62d 2018-03-15 stsp if (base_file)
1133 7e656b93 2018-03-17 stsp err = got_inflate_to_file(&base_len,
1134 f7e127f3 2018-03-17 stsp pack->packfile, base_file);
1136 8628c62d 2018-03-15 stsp err = got_inflate_to_mem(&base_buf, &base_len,
1137 f7e127f3 2018-03-17 stsp pack->packfile);
1138 8628c62d 2018-03-15 stsp if (base_len < max_size) {
1139 8628c62d 2018-03-15 stsp uint8_t *p;
1140 8628c62d 2018-03-15 stsp p = reallocarray(base_buf, 1, max_size);
1141 8628c62d 2018-03-15 stsp if (p == NULL) {
1142 0a585a0d 2018-03-17 stsp err = got_error_from_errno();
1143 8628c62d 2018-03-15 stsp goto done;
1145 8628c62d 2018-03-15 stsp base_buf = p;
1149 a6b158cc 2018-02-11 stsp goto done;
1151 8628c62d 2018-03-15 stsp if (base_file)
1152 8628c62d 2018-03-15 stsp rewind(base_file);
1156 8628c62d 2018-03-15 stsp if (base_buf) {
1157 a53d2f13 2018-03-17 stsp err = got_delta_apply_in_mem(base_buf, delta->delta_buf,
1158 a53d2f13 2018-03-17 stsp delta->delta_len, accum_buf, &accum_size);
1161 a53d2f13 2018-03-17 stsp err = got_delta_apply(base_file, delta->delta_buf,
1162 a53d2f13 2018-03-17 stsp delta->delta_len,
1163 8628c62d 2018-03-15 stsp /* Final delta application writes to output file. */
1164 b29656e2 2018-03-16 stsp ++n < deltas->nentries ? accum_file : outfile,
1165 b29656e2 2018-03-16 stsp &accum_size);
1168 6691714a 2018-01-23 stsp goto done;
1170 710bb5ca 2018-01-23 stsp if (n < deltas->nentries) {
1171 6691714a 2018-01-23 stsp /* Accumulated delta becomes the new base. */
1172 8628c62d 2018-03-15 stsp if (base_buf) {
1173 8628c62d 2018-03-15 stsp uint8_t *tmp = accum_buf;
1174 8628c62d 2018-03-15 stsp accum_buf = base_buf;
1175 8628c62d 2018-03-15 stsp base_buf = tmp;
1177 8628c62d 2018-03-15 stsp FILE *tmp = accum_file;
1178 8628c62d 2018-03-15 stsp accum_file = base_file;
1179 8628c62d 2018-03-15 stsp base_file = tmp;
1180 8628c62d 2018-03-15 stsp rewind(base_file);
1181 8628c62d 2018-03-15 stsp rewind(accum_file);
1187 8628c62d 2018-03-15 stsp free(base_buf);
1188 8628c62d 2018-03-15 stsp if (accum_buf) {
1189 8628c62d 2018-03-15 stsp size_t len = fwrite(accum_buf, 1, accum_size, outfile);
1190 8628c62d 2018-03-15 stsp free(accum_buf);
1191 8628c62d 2018-03-15 stsp if (len != accum_size)
1192 8628c62d 2018-03-15 stsp return got_ferror(outfile, GOT_ERR_IO);
1194 8628c62d 2018-03-15 stsp if (base_file)
1195 8628c62d 2018-03-15 stsp fclose(base_file);
1196 8628c62d 2018-03-15 stsp if (accum_file)
1197 8628c62d 2018-03-15 stsp fclose(accum_file);
1198 6691714a 2018-01-23 stsp rewind(outfile);
1199 b29656e2 2018-03-16 stsp if (err == NULL)
1200 b29656e2 2018-03-16 stsp *result_size = accum_size;
1201 e0ab43e7 2018-03-16 stsp return err;
1204 e0ab43e7 2018-03-16 stsp static const struct got_error *
1205 e0ab43e7 2018-03-16 stsp dump_delta_chain_to_mem(uint8_t **outbuf, size_t *outlen,
1206 72eb3431 2018-04-01 stsp struct got_delta_chain *deltas, struct got_repository *repo)
1208 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1209 e0ab43e7 2018-03-16 stsp struct got_delta *delta;
1210 e0ab43e7 2018-03-16 stsp uint8_t *base_buf = NULL, *accum_buf = NULL;
1211 e0ab43e7 2018-03-16 stsp size_t accum_size;
1212 e0ab43e7 2018-03-16 stsp uint64_t max_size;
1213 e0ab43e7 2018-03-16 stsp int n = 0;
1215 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1216 e0ab43e7 2018-03-16 stsp *outlen = 0;
1218 e0ab43e7 2018-03-16 stsp if (SIMPLEQ_EMPTY(&deltas->entries))
1219 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_BAD_DELTA_CHAIN);
1221 40426839 2018-03-17 stsp err = get_delta_chain_max_size(&max_size, deltas);
1223 e0ab43e7 2018-03-16 stsp return err;
1224 e0ab43e7 2018-03-16 stsp accum_buf = malloc(max_size);
1225 e0ab43e7 2018-03-16 stsp if (accum_buf == NULL)
1226 0a585a0d 2018-03-17 stsp return got_error_from_errno();
1228 e0ab43e7 2018-03-16 stsp /* Deltas are ordered in ascending order. */
1229 e0ab43e7 2018-03-16 stsp SIMPLEQ_FOREACH(delta, &deltas->entries, entry) {
1230 e0ab43e7 2018-03-16 stsp if (n == 0) {
1231 72eb3431 2018-04-01 stsp struct got_pack *pack;
1232 e0ab43e7 2018-03-16 stsp size_t base_len;
1234 e0ab43e7 2018-03-16 stsp /* Plain object types are the delta base. */
1235 e0ab43e7 2018-03-16 stsp if (delta->type != GOT_OBJ_TYPE_COMMIT &&
1236 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TREE &&
1237 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_BLOB &&
1238 e0ab43e7 2018-03-16 stsp delta->type != GOT_OBJ_TYPE_TAG) {
1239 72eb3431 2018-04-01 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1240 72eb3431 2018-04-01 stsp goto done;
1243 72eb3431 2018-04-01 stsp pack = get_cached_pack(delta->path_packfile, repo);
1244 72eb3431 2018-04-01 stsp if (pack == NULL) {
1245 e0ab43e7 2018-03-16 stsp err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
1246 e0ab43e7 2018-03-16 stsp goto done;
1249 f7e127f3 2018-03-17 stsp if (fseeko(pack->packfile, delta->offset + delta->tslen,
1250 e0ab43e7 2018-03-16 stsp SEEK_SET) != 0) {
1251 e0ab43e7 2018-03-16 stsp err = got_error_from_errno();
1252 e0ab43e7 2018-03-16 stsp goto done;
1254 e0ab43e7 2018-03-16 stsp err = got_inflate_to_mem(&base_buf, &base_len,
1255 f7e127f3 2018-03-17 stsp pack->packfile);
1256 e0ab43e7 2018-03-16 stsp if (base_len < max_size) {
1257 e0ab43e7 2018-03-16 stsp uint8_t *p;
1258 e0ab43e7 2018-03-16 stsp p = reallocarray(base_buf, 1, max_size);
1259 e0ab43e7 2018-03-16 stsp if (p == NULL) {
1260 0a585a0d 2018-03-17 stsp err = got_error_from_errno();
1261 e0ab43e7 2018-03-16 stsp goto done;
1263 e0ab43e7 2018-03-16 stsp base_buf = p;
1266 e0ab43e7 2018-03-16 stsp goto done;
1271 a53d2f13 2018-03-17 stsp err = got_delta_apply_in_mem(base_buf, delta->delta_buf,
1272 a53d2f13 2018-03-17 stsp delta->delta_len, accum_buf, &accum_size);
1275 e0ab43e7 2018-03-16 stsp goto done;
1277 e0ab43e7 2018-03-16 stsp if (n < deltas->nentries) {
1278 e0ab43e7 2018-03-16 stsp /* Accumulated delta becomes the new base. */
1279 e0ab43e7 2018-03-16 stsp uint8_t *tmp = accum_buf;
1280 e0ab43e7 2018-03-16 stsp accum_buf = base_buf;
1281 e0ab43e7 2018-03-16 stsp base_buf = tmp;
1286 e0ab43e7 2018-03-16 stsp free(base_buf);
1287 e0ab43e7 2018-03-16 stsp if (err) {
1288 e0ab43e7 2018-03-16 stsp free(accum_buf);
1289 e0ab43e7 2018-03-16 stsp *outbuf = NULL;
1290 e0ab43e7 2018-03-16 stsp *outlen = 0;
1292 e0ab43e7 2018-03-16 stsp *outbuf = accum_buf;
1293 e0ab43e7 2018-03-16 stsp *outlen = accum_size;
1295 efd2a263 2018-01-19 stsp return err;
1298 3ee5fc21 2018-01-17 stsp const struct got_error *
1299 3ee5fc21 2018-01-17 stsp got_packfile_extract_object(FILE **f, struct got_object *obj,
1300 3ee5fc21 2018-01-17 stsp struct got_repository *repo)
1302 3ee5fc21 2018-01-17 stsp const struct got_error *err = NULL;
1304 3ee5fc21 2018-01-17 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1305 3ee5fc21 2018-01-17 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1307 040bf4a1 2018-04-01 stsp *f = got_opentemp();
1308 040bf4a1 2018-04-01 stsp if (*f == NULL) {
1309 040bf4a1 2018-04-01 stsp err = got_error(GOT_ERR_FILE_OPEN);
1310 040bf4a1 2018-04-01 stsp goto done;
1313 ef2bccd9 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1314 72eb3431 2018-04-01 stsp struct got_pack *pack;
1316 72eb3431 2018-04-01 stsp pack = get_cached_pack(obj->path_packfile, repo);
1317 72eb3431 2018-04-01 stsp if (pack == NULL) {
1318 72eb3431 2018-04-01 stsp err = cache_pack(&pack, obj->path_packfile, NULL, repo);
1320 72eb3431 2018-04-01 stsp goto done;
1323 7e656b93 2018-03-17 stsp if (fseeko(pack->packfile, obj->pack_offset, SEEK_SET) != 0) {
1324 6691714a 2018-01-23 stsp err = got_error_from_errno();
1325 c52ac529 2018-03-17 stsp goto done;
1328 7e656b93 2018-03-17 stsp err = got_inflate_to_file(&obj->size, pack->packfile, *f);
1330 b29656e2 2018-03-16 stsp err = dump_delta_chain_to_file(&obj->size, &obj->deltas, *f,
1333 d0f3be7c 2018-03-17 stsp if (err && *f) {
1334 3ee5fc21 2018-01-17 stsp fclose(*f);
1335 d0f3be7c 2018-03-17 stsp *f = NULL;
1337 a1fd68d8 2018-01-12 stsp return err;
1340 e0ab43e7 2018-03-16 stsp const struct got_error *
1341 e0ab43e7 2018-03-16 stsp got_packfile_extract_object_to_mem(uint8_t **buf, size_t *len,
1342 e0ab43e7 2018-03-16 stsp struct got_object *obj, struct got_repository *repo)
1344 e0ab43e7 2018-03-16 stsp const struct got_error *err = NULL;
1346 e0ab43e7 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
1347 e0ab43e7 2018-03-16 stsp return got_error(GOT_ERR_OBJ_NOT_PACKED);
1349 ef2bccd9 2018-03-16 stsp if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
1350 72eb3431 2018-04-01 stsp struct got_pack *pack;
1352 72eb3431 2018-04-01 stsp pack = get_cached_pack(obj->path_packfile, repo);
1353 72eb3431 2018-04-01 stsp if (pack == NULL) {
1354 72eb3431 2018-04-01 stsp err = cache_pack(&pack, obj->path_packfile, NULL, repo);
1356 72eb3431 2018-04-01 stsp goto done;
1359 7e656b93 2018-03-17 stsp if (fseeko(pack->packfile, obj->pack_offset, SEEK_SET) != 0) {
1360 e0ab43e7 2018-03-16 stsp err = got_error_from_errno();
1361 e0ab43e7 2018-03-16 stsp goto done;
1364 7e656b93 2018-03-17 stsp err = got_inflate_to_mem(buf, len, pack->packfile);
1366 72eb3431 2018-04-01 stsp err = dump_delta_chain_to_mem(buf, len, &obj->deltas, repo);
1368 e0ab43e7 2018-03-16 stsp return err;
