GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/nfs4/filehandle.cc
Date: 2026-10-18 02:40:11
Exec Total Coverage
Lines: 47 49 95.9%
Branches: 26 40 65.0%
Line Branch Exec Source
1 /**
2 * This file is part of the CernVM File System.
3 */
4
5 #include "nfs4/filehandle.h"
6
7 #include "nfs4/xdr.h"
8
9 namespace nfs4 {
10
11 namespace {
12 const unsigned char kMagic[4] = {'C', 'V', 'N', '4'};
13 const unsigned char kVersion = 1;
14
15 1494 uint32_t Fnv1a(const unsigned char *data, size_t len) {
16 1494 uint32_t h = 2166136261u;
17
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 40593 for (size_t i = 0; i < len; ++i) {
18 39099 h ^= data[i];
19 39099 h *= 16777619u;
20 }
21 1494 return h;
22 }
23 } // anonymous namespace
24
25 575 std::string FileHandle::Encode() const {
26 575 XdrWriter w;
27
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 575 w.PutRaw(kMagic, sizeof(kMagic));
28 575 const unsigned char header[4] = {kVersion, static_cast<unsigned char>(kind),
29 575 0, 0};
30
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 575 w.PutRaw(header, sizeof(header));
31
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 575 w.PutU64(fsid);
32
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 575 w.PutU64(ino);
33
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 575 w.PutU32(aux);
34 575 const std::string &buf = w.buffer();
35
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 1150 w.PutU32(
36 575 Fnv1a(reinterpret_cast<const unsigned char *>(buf.data()), buf.size()));
37
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 1150 return w.buffer();
38 575 }
39
40 794 bool FileHandle::Decode(const std::string &raw, FileHandle *fh) {
41
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 794 if (raw.size() != kSize)
42 19 return false;
43 775 const unsigned char *p = reinterpret_cast<const unsigned char *>(raw.data());
44
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 3845 for (unsigned i = 0; i < sizeof(kMagic); ++i) {
45
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 3082 if (p[i] != kMagic[i])
46 12 return false;
47 }
48
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 763 if (p[4] != kVersion)
49 3 return false;
50 760 const unsigned char kind = p[5];
51
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 760 if (kind < kObject || kind > kNamedAttr)
52 ✗ return false;
53
54 760 XdrReader r(p + 8, kSize - 8);
55 uint64_t fsid, ino;
56 uint32_t aux, check;
57
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 760 r.GetU64(&fsid);
58
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 760 r.GetU64(&ino);
59
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 760 r.GetU32(&aux);
60
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 760 r.GetU32(&check);
61
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 760 if (!r.ok())
62 ✗ return false;
63
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 760 if (check != Fnv1a(p, kSize - 4))
64 81 return false;
65
66 679 fh->kind = static_cast<Kind>(kind);
67 679 fh->fsid = fsid;
68 679 fh->ino = ino;
69 679 fh->aux = aux;
70 679 return true;
71 }
72
73 159 uint32_t HashName(const std::string &name) {
74 159 return Fnv1a(reinterpret_cast<const unsigned char *>(name.data()),
75 159 name.size());
76 }
77
78 } // namespace nfs4
79