GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/nfs4/filehandle.cc
Date: 2026-11-01 02:41:19
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 3950 uint32_t Fnv1a(const unsigned char *data, size_t len) {
16 3950 uint32_t h = 2166136261u;
17
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 107740 for (size_t i = 0; i < len; ++i) {
18 103790 h ^= data[i];
19 103790 h *= 16777619u;
20 }
21 3950 return h;
22 }
23 } // anonymous namespace
24
25 1413 std::string FileHandle::Encode() const {
26 1413 XdrWriter w;
27
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 1413 w.PutRaw(kMagic, sizeof(kMagic));
28 1413 const unsigned char header[4] = {kVersion, static_cast<unsigned char>(kind),
29 1413 0, 0};
30
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 1413 w.PutRaw(header, sizeof(header));
31
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 1413 w.PutU64(fsid);
32
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 1413 w.PutU64(ino);
33
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 1413 w.PutU32(aux);
34 1413 const std::string &buf = w.buffer();
35
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 2826 w.PutU32(
36 1413 Fnv1a(reinterpret_cast<const unsigned char *>(buf.data()), buf.size()));
37
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 2826 return w.buffer();
38 1413 }
39
40 2304 bool FileHandle::Decode(const std::string &raw, FileHandle *fh) {
41
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 2304 if (raw.size() != kSize)
42 67 return false;
43 2237 const unsigned char *p = reinterpret_cast<const unsigned char *>(raw.data());
44
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 11005 for (unsigned i = 0; i < sizeof(kMagic); ++i) {
45
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 8840 if (p[i] != kMagic[i])
46 72 return false;
47 }
48
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 2165 if (p[4] != kVersion)
49 18 return false;
50 2147 const unsigned char kind = p[5];
51
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 2147 if (kind < kObject || kind > kNamedAttr)
52 ✗ return false;
53
54 2147 XdrReader r(p + 8, kSize - 8);
55 uint64_t fsid, ino;
56 uint32_t aux, check;
57
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 2147 r.GetU64(&fsid);
58
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 2147 r.GetU64(&ino);
59
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 2147 r.GetU32(&aux);
60
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 2147 r.GetU32(&check);
61
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 2147 if (!r.ok())
62 ✗ return false;
63
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 2147 if (check != Fnv1a(p, kSize - 4))
64 486 return false;
65
66 1661 fh->kind = static_cast<Kind>(kind);
67 1661 fh->fsid = fsid;
68 1661 fh->ino = ino;
69 1661 fh->aux = aux;
70 1661 return true;
71 }
72
73 390 uint32_t HashName(const std::string &name) {
74 390 return Fnv1a(reinterpret_cast<const unsigned char *>(name.data()),
75 390 name.size());
76 }
77
78 } // namespace nfs4
79