GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/fd_refcount_mgr.cc
Date: 2025-08-31 02:39:21
Exec Total Coverage
Lines: 80 80 100.0%
Branches: 45 76 59.2%
Line Branch Exec Source
1 /**
2 * This file is part of the CernVM File System.
3 */
4
5 #include "fd_refcount_mgr.h"
6
7 #include <fcntl.h>
8 #include <unistd.h>
9
10 #include <cassert>
11 #include <string>
12
13 #include "util/mutex.h"
14 #include "util/smalloc.h"
15
16
17 3811 int FdRefcountMgr::Open(const shash::Any id, const std::string &path) {
18 3811 int result = -1;
19 3811 const MutexLockGuard lock_guard(lock_cache_refcount_);
20
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 3811 if (!map_fd_.Lookup(id, &result)) {
21
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 3627 result = open(path.c_str(), O_RDONLY);
22
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 3627 if (result >= 0) {
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 1750 map_fd_.Insert(id, result);
24 }
25 }
26
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 3811 if (result >= 0) {
27
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 1934 FdRefcountInfo refc_info;
28
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 1934 if (map_refcount_.Lookup(result, &refc_info)) {
29 184 refc_info.refcount++;
30 } else {
31 1750 refc_info.refcount = 1;
32 1750 refc_info.id = id;
33 }
34
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 1934 map_refcount_.Insert(result, refc_info);
35 }
36 3811 return result;
37 3811 }
38
39 1781 int FdRefcountMgr::Close(int fd) {
40 1781 int retval = -1;
41 1781 const MutexLockGuard lock_guard(lock_cache_refcount_);
42
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 1781 FdRefcountInfo refc_info;
43
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 1781 if (map_refcount_.Lookup(fd, &refc_info)) {
44
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 1733 if (refc_info.refcount > 1) {
45 127 refc_info.refcount -= 1;
46
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 127 map_refcount_.Insert(fd, refc_info);
47 127 retval = 0;
48 } else {
49
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 1606 retval = close(fd);
50
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 1606 map_fd_.Erase(refc_info.id);
51
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 1606 map_refcount_.Erase(fd);
52 }
53 } else {
54 // fd not present in our table - this should only happen
55 // when reloading from the normal posix cache manager!
56
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 48 LogCvmfs(kLogCache, kLogDebug,
57 "WARNING: trying to close fd that "
58 " is not in refcount tables");
59
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 48 retval = close(fd);
60 }
61 1781 return retval;
62 1781 }
63
64 102 int FdRefcountMgr::Dup(int fd) {
65 102 int retval = -1;
66 102 const MutexLockGuard lock_guard(lock_cache_refcount_);
67
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 102 FdRefcountInfo refc_info;
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 102 if (map_refcount_.Lookup(fd, &refc_info)) {
69 51 refc_info.refcount += 1;
70
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 51 map_refcount_.Insert(fd, refc_info);
71 51 retval = fd;
72 } else {
73 // fd not present in our table - this should
74 // not happen in the current usage of Dup
75
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 51 LogCvmfs(kLogCache, kLogDebug,
76 "WARNING: trying to dup fd that "
77 " is not in refcount tables");
78 51 retval = dup(fd);
79 }
80 102 return retval;
81 102 }
82
83 45 FdRefcountMgr *FdRefcountMgr::Clone() {
84
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 45 FdRefcountMgr *clone = new FdRefcountMgr(map_refcount_, map_fd_);
85 45 return clone;
86 }
87
88 45 SmallHashDynamic<shash::Any, int> *FdRefcountMgr::GetFdMapPtr() {
89 45 return &map_fd_;
90 }
91
92 SmallHashDynamic<int, FdRefcountMgr::FdRefcountInfo> *
93 45 FdRefcountMgr::GetRefcountMapPtr() {
94 45 return &map_refcount_;
95 }
96
97 45 void FdRefcountMgr::AssignFrom(FdRefcountMgr *other) {
98 45 map_fd_ = *other->GetFdMapPtr();
99 45 map_refcount_ = *other->GetRefcountMapPtr();
100 45 }
101
102 4348 FdRefcountMgr::~FdRefcountMgr() {
103 4348 pthread_mutex_destroy(lock_cache_refcount_);
104 4348 free(lock_cache_refcount_);
105 4348 }
106
107
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 4312 FdRefcountMgr::FdRefcountMgr() {
108
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 4312 const shash::Any hash_null;
109
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 4312 map_fd_.Init(16, hash_null, hasher_any);
110
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 4312 map_refcount_.Init(16, -1, hasher_int);
111 4312 lock_cache_refcount_ = reinterpret_cast<pthread_mutex_t *>(
112 4312 smalloc(sizeof(pthread_mutex_t)));
113 4312 const int retval = pthread_mutex_init(lock_cache_refcount_, NULL);
114
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 4312 assert(retval == 0);
115 4312 }
116
117 45 FdRefcountMgr::FdRefcountMgr(
118 const SmallHashDynamic<int, FdRefcountMgr::FdRefcountInfo> &map_refcount,
119
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 45 const SmallHashDynamic<shash::Any, int> &map_fd) {
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 45 const shash::Any hash_null;
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 45 map_fd_.Init(16, hash_null, hasher_any);
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 45 map_refcount_.Init(16, -1, hasher_int);
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 45 map_refcount_ = map_refcount;
124
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 45 map_fd_ = map_fd;
125 45 lock_cache_refcount_ = reinterpret_cast<pthread_mutex_t *>(
126 45 smalloc(sizeof(pthread_mutex_t)));
127 45 const int retval = pthread_mutex_init(lock_cache_refcount_, NULL);
128
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 45 assert(retval == 0);
129 45 }
130