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Commit | Line | Data |
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f9253394 JH |
1 | #include "cache.h" |
2 | #include "pack.h" | |
3 | ||
4 | static int verify_packfile(struct packed_git *p) | |
5 | { | |
6 | unsigned long index_size = p->index_size; | |
7 | void *index_base = p->index_base; | |
8 | SHA_CTX ctx; | |
9 | unsigned char sha1[20]; | |
10 | unsigned long pack_size = p->pack_size; | |
11 | void *pack_base; | |
12 | struct pack_header *hdr; | |
f3bf9224 | 13 | int nr_objects, err, i; |
f9253394 | 14 | |
f3bf9224 | 15 | /* Header consistency check */ |
f9253394 JH |
16 | hdr = p->pack_base; |
17 | if (hdr->hdr_signature != htonl(PACK_SIGNATURE)) | |
4ec99bf0 | 18 | return error("Packfile %s signature mismatch", p->pack_name); |
d60fc1c8 NP |
19 | if (!pack_version_ok(hdr->hdr_version)) |
20 | return error("Packfile version %d unsupported", | |
21 | ntohl(hdr->hdr_version)); | |
f9253394 JH |
22 | nr_objects = ntohl(hdr->hdr_entries); |
23 | if (num_packed_objects(p) != nr_objects) | |
24 | return error("Packfile claims to have %d objects, " | |
25 | "while idx size expects %d", nr_objects, | |
26 | num_packed_objects(p)); | |
27 | ||
28 | SHA1_Init(&ctx); | |
29 | pack_base = p->pack_base; | |
30 | SHA1_Update(&ctx, pack_base, pack_size - 20); | |
31 | SHA1_Final(sha1, &ctx); | |
a89fccd2 | 32 | if (hashcmp(sha1, (unsigned char *)pack_base + pack_size - 20)) |
f9253394 JH |
33 | return error("Packfile %s SHA1 mismatch with itself", |
34 | p->pack_name); | |
a89fccd2 | 35 | if (hashcmp(sha1, (unsigned char *)index_base + index_size - 40)) |
55e1805d JH |
36 | return error("Packfile %s SHA1 mismatch with idx", |
37 | p->pack_name); | |
f3bf9224 JH |
38 | |
39 | /* Make sure everything reachable from idx is valid. Since we | |
40 | * have verified that nr_objects matches between idx and pack, | |
41 | * we do not do scan-streaming check on the pack file. | |
42 | */ | |
43 | for (i = err = 0; i < nr_objects; i++) { | |
44 | unsigned char sha1[20]; | |
f3bf9224 JH |
45 | void *data; |
46 | char type[20]; | |
43057304 | 47 | unsigned long size, offset; |
f3bf9224 JH |
48 | |
49 | if (nth_packed_object_sha1(p, i, sha1)) | |
50 | die("internal error pack-check nth-packed-object"); | |
43057304 NP |
51 | offset = find_pack_entry_one(sha1, p); |
52 | if (!offset) | |
f3bf9224 | 53 | die("internal error pack-check find-pack-entry-one"); |
43057304 | 54 | data = unpack_entry_gently(p, offset, type, &size); |
f3bf9224 JH |
55 | if (!data) { |
56 | err = error("cannot unpack %s from %s", | |
57 | sha1_to_hex(sha1), p->pack_name); | |
58 | continue; | |
59 | } | |
60 | if (check_sha1_signature(sha1, data, size, type)) { | |
1038f0c0 | 61 | err = error("packed %s from %s is corrupt", |
f3bf9224 JH |
62 | sha1_to_hex(sha1), p->pack_name); |
63 | free(data); | |
64 | continue; | |
65 | } | |
66 | free(data); | |
67 | } | |
68 | ||
69 | return err; | |
f9253394 JH |
70 | } |
71 | ||
72 | ||
473ab165 JH |
73 | #define MAX_CHAIN 40 |
74 | ||
f3bf9224 JH |
75 | static void show_pack_info(struct packed_git *p) |
76 | { | |
ad8c80a5 JH |
77 | struct pack_header *hdr; |
78 | int nr_objects, i; | |
473ab165 | 79 | unsigned int chain_histogram[MAX_CHAIN]; |
ad8c80a5 JH |
80 | |
81 | hdr = p->pack_base; | |
82 | nr_objects = ntohl(hdr->hdr_entries); | |
473ab165 | 83 | memset(chain_histogram, 0, sizeof(chain_histogram)); |
ad8c80a5 JH |
84 | |
85 | for (i = 0; i < nr_objects; i++) { | |
86 | unsigned char sha1[20], base_sha1[20]; | |
ad8c80a5 JH |
87 | char type[20]; |
88 | unsigned long size; | |
89 | unsigned long store_size; | |
43057304 | 90 | unsigned long offset; |
f8f135c9 | 91 | unsigned int delta_chain_length; |
ad8c80a5 JH |
92 | |
93 | if (nth_packed_object_sha1(p, i, sha1)) | |
94 | die("internal error pack-check nth-packed-object"); | |
43057304 NP |
95 | offset = find_pack_entry_one(sha1, p); |
96 | if (!offset) | |
ad8c80a5 JH |
97 | die("internal error pack-check find-pack-entry-one"); |
98 | ||
43057304 | 99 | packed_object_info_detail(p, offset, type, &size, &store_size, |
ad8c80a5 JH |
100 | &delta_chain_length, |
101 | base_sha1); | |
102 | printf("%s ", sha1_to_hex(sha1)); | |
103 | if (!delta_chain_length) | |
43057304 | 104 | printf("%-6s %lu %lu\n", type, size, offset); |
473ab165 | 105 | else { |
43057304 | 106 | printf("%-6s %lu %lu %u %s\n", type, size, offset, |
ad8c80a5 | 107 | delta_chain_length, sha1_to_hex(base_sha1)); |
473ab165 JH |
108 | if (delta_chain_length < MAX_CHAIN) |
109 | chain_histogram[delta_chain_length]++; | |
110 | else | |
111 | chain_histogram[0]++; | |
112 | } | |
ad8c80a5 JH |
113 | } |
114 | ||
473ab165 JH |
115 | for (i = 0; i < MAX_CHAIN; i++) { |
116 | if (!chain_histogram[i]) | |
117 | continue; | |
118 | printf("chain length %s %d: %d object%s\n", | |
119 | i ? "=" : ">=", | |
120 | i ? i : MAX_CHAIN, | |
121 | chain_histogram[i], | |
122 | 1 < chain_histogram[i] ? "s" : ""); | |
123 | } | |
f3bf9224 JH |
124 | } |
125 | ||
126 | int verify_pack(struct packed_git *p, int verbose) | |
f9253394 JH |
127 | { |
128 | unsigned long index_size = p->index_size; | |
129 | void *index_base = p->index_base; | |
130 | SHA_CTX ctx; | |
131 | unsigned char sha1[20]; | |
132 | int ret; | |
133 | ||
f3bf9224 | 134 | ret = 0; |
f9253394 JH |
135 | /* Verify SHA1 sum of the index file */ |
136 | SHA1_Init(&ctx); | |
137 | SHA1_Update(&ctx, index_base, index_size - 20); | |
138 | SHA1_Final(sha1, &ctx); | |
a89fccd2 | 139 | if (hashcmp(sha1, (unsigned char *)index_base + index_size - 20)) |
f3bf9224 JH |
140 | ret = error("Packfile index for %s SHA1 mismatch", |
141 | p->pack_name); | |
142 | ||
143 | if (!ret) { | |
144 | /* Verify pack file */ | |
145 | use_packed_git(p); | |
146 | ret = verify_packfile(p); | |
147 | unuse_packed_git(p); | |
148 | } | |
149 | ||
150 | if (verbose) { | |
151 | if (ret) | |
152 | printf("%s: bad\n", p->pack_name); | |
153 | else { | |
ad8c80a5 | 154 | use_packed_git(p); |
f3bf9224 | 155 | show_pack_info(p); |
ad8c80a5 | 156 | unuse_packed_git(p); |
f3bf9224 JH |
157 | printf("%s: ok\n", p->pack_name); |
158 | } | |
159 | } | |
f9253394 | 160 | |
f9253394 JH |
161 | return ret; |
162 | } |