Use uint32_t for all packed object counts.
[git/git.git] / pack-check.c
1 #include "cache.h"
2 #include "pack.h"
3
4 static int verify_packfile(struct packed_git *p,
5 struct pack_window **w_curs)
6 {
7 unsigned long index_size = p->index_size;
8 void *index_base = p->index_base;
9 SHA_CTX ctx;
10 unsigned char sha1[20];
11 unsigned long offset = 0, pack_sig = p->pack_size - 20;
12 uint32_t nr_objects, i;
13 int err;
14
15 /* Note that the pack header checks are actually performed by
16 * use_pack when it first opens the pack file. If anything
17 * goes wrong during those checks then the call will die out
18 * immediately.
19 */
20
21 SHA1_Init(&ctx);
22 while (offset < pack_sig) {
23 unsigned int remaining;
24 unsigned char *in = use_pack(p, w_curs, offset, &remaining);
25 offset += remaining;
26 if (offset > pack_sig)
27 remaining -= offset - pack_sig;
28 SHA1_Update(&ctx, in, remaining);
29 }
30 SHA1_Final(sha1, &ctx);
31 if (hashcmp(sha1, use_pack(p, w_curs, pack_sig, NULL)))
32 return error("Packfile %s SHA1 mismatch with itself",
33 p->pack_name);
34 if (hashcmp(sha1, (unsigned char *)index_base + index_size - 40))
35 return error("Packfile %s SHA1 mismatch with idx",
36 p->pack_name);
37 unuse_pack(w_curs);
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 nr_objects = num_packed_objects(p);
44 for (i = 0, err = 0; i < nr_objects; i++) {
45 unsigned char sha1[20];
46 void *data;
47 enum object_type type;
48 unsigned long size, offset;
49
50 if (nth_packed_object_sha1(p, i, sha1))
51 die("internal error pack-check nth-packed-object");
52 offset = find_pack_entry_one(sha1, p);
53 if (!offset)
54 die("internal error pack-check find-pack-entry-one");
55 data = unpack_entry(p, offset, &type, &size);
56 if (!data) {
57 err = error("cannot unpack %s from %s",
58 sha1_to_hex(sha1), p->pack_name);
59 continue;
60 }
61 if (check_sha1_signature(sha1, data, size, typename(type))) {
62 err = error("packed %s from %s is corrupt",
63 sha1_to_hex(sha1), p->pack_name);
64 free(data);
65 continue;
66 }
67 free(data);
68 }
69
70 return err;
71 }
72
73
74 #define MAX_CHAIN 40
75
76 static void show_pack_info(struct packed_git *p)
77 {
78 uint32_t nr_objects, i, chain_histogram[MAX_CHAIN];
79
80 nr_objects = num_packed_objects(p);
81 memset(chain_histogram, 0, sizeof(chain_histogram));
82
83 for (i = 0; i < nr_objects; i++) {
84 unsigned char sha1[20], base_sha1[20];
85 const char *type;
86 unsigned long size;
87 unsigned long store_size;
88 unsigned long offset;
89 unsigned int delta_chain_length;
90
91 if (nth_packed_object_sha1(p, i, sha1))
92 die("internal error pack-check nth-packed-object");
93 offset = find_pack_entry_one(sha1, p);
94 if (!offset)
95 die("internal error pack-check find-pack-entry-one");
96
97 type = packed_object_info_detail(p, offset, &size, &store_size,
98 &delta_chain_length,
99 base_sha1);
100 printf("%s ", sha1_to_hex(sha1));
101 if (!delta_chain_length)
102 printf("%-6s %lu %lu\n", type, size, offset);
103 else {
104 printf("%-6s %lu %lu %u %s\n", type, size, offset,
105 delta_chain_length, sha1_to_hex(base_sha1));
106 if (delta_chain_length < MAX_CHAIN)
107 chain_histogram[delta_chain_length]++;
108 else
109 chain_histogram[0]++;
110 }
111 }
112
113 for (i = 0; i < MAX_CHAIN; i++) {
114 if (!chain_histogram[i])
115 continue;
116 printf("chain length %s %d: %d object%s\n",
117 i ? "=" : ">=",
118 i ? i : MAX_CHAIN,
119 chain_histogram[i],
120 1 < chain_histogram[i] ? "s" : "");
121 }
122 }
123
124 int verify_pack(struct packed_git *p, int verbose)
125 {
126 unsigned long index_size = p->index_size;
127 void *index_base = p->index_base;
128 SHA_CTX ctx;
129 unsigned char sha1[20];
130 int ret;
131
132 ret = 0;
133 /* Verify SHA1 sum of the index file */
134 SHA1_Init(&ctx);
135 SHA1_Update(&ctx, index_base, index_size - 20);
136 SHA1_Final(sha1, &ctx);
137 if (hashcmp(sha1, (unsigned char *)index_base + index_size - 20))
138 ret = error("Packfile index for %s SHA1 mismatch",
139 p->pack_name);
140
141 if (!ret) {
142 /* Verify pack file */
143 struct pack_window *w_curs = NULL;
144 ret = verify_packfile(p, &w_curs);
145 unuse_pack(&w_curs);
146 }
147
148 if (verbose) {
149 if (ret)
150 printf("%s: bad\n", p->pack_name);
151 else {
152 show_pack_info(p);
153 printf("%s: ok\n", p->pack_name);
154 }
155 }
156
157 return ret;
158 }