GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/fd_refcount_mgr.cc
Date: 2025-09-14 02:35:40
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 4572 int FdRefcountMgr::Open(const shash::Any id, const std::string &path) {
18 4572 int result = -1;
19 4572 const MutexLockGuard lock_guard(lock_cache_refcount_);
20
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 4572 if (!map_fd_.Lookup(id, &result)) {
21
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 4452 result = open(path.c_str(), O_RDONLY);
22
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 4452 if (result >= 0) {
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 1744 map_fd_.Insert(id, result);
24 }
25 }
26
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 4572 if (result >= 0) {
27
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 1864 FdRefcountInfo refc_info;
28
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 1864 if (map_refcount_.Lookup(result, &refc_info)) {
29 120 refc_info.refcount++;
30 } else {
31 1744 refc_info.refcount = 1;
32 1744 refc_info.id = id;
33 }
34
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 1864 map_refcount_.Insert(result, refc_info);
35 }
36 4572 return result;
37 4572 }
38
39 1783 int FdRefcountMgr::Close(int fd) {
40 1783 int retval = -1;
41 1783 const MutexLockGuard lock_guard(lock_cache_refcount_);
42
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 1783 FdRefcountInfo refc_info;
43
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 1783 if (map_refcount_.Lookup(fd, &refc_info)) {
44
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 1774 if (refc_info.refcount > 1) {
45 94 refc_info.refcount -= 1;
46
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 94 map_refcount_.Insert(fd, refc_info);
47 94 retval = 0;
48 } else {
49
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 1680 retval = close(fd);
50
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 1680 map_fd_.Erase(refc_info.id);
51
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 1680 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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 9 LogCvmfs(kLogCache, kLogDebug,
57 "WARNING: trying to close fd that "
58 " is not in refcount tables");
59
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 9 retval = close(fd);
60 }
61 1783 return retval;
62 1783 }
63
64 44 int FdRefcountMgr::Dup(int fd) {
65 44 int retval = -1;
66 44 const MutexLockGuard lock_guard(lock_cache_refcount_);
67
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 44 FdRefcountInfo refc_info;
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 44 if (map_refcount_.Lookup(fd, &refc_info)) {
69 22 refc_info.refcount += 1;
70
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 22 map_refcount_.Insert(fd, refc_info);
71 22 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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 22 LogCvmfs(kLogCache, kLogDebug,
76 "WARNING: trying to dup fd that "
77 " is not in refcount tables");
78 22 retval = dup(fd);
79 }
80 44 return retval;
81 44 }
82
83 6 FdRefcountMgr *FdRefcountMgr::Clone() {
84
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 6 FdRefcountMgr *clone = new FdRefcountMgr(map_refcount_, map_fd_);
85 6 return clone;
86 }
87
88 6 SmallHashDynamic<shash::Any, int> *FdRefcountMgr::GetFdMapPtr() {
89 6 return &map_fd_;
90 }
91
92 SmallHashDynamic<int, FdRefcountMgr::FdRefcountInfo> *
93 6 FdRefcountMgr::GetRefcountMapPtr() {
94 6 return &map_refcount_;
95 }
96
97 6 void FdRefcountMgr::AssignFrom(FdRefcountMgr *other) {
98 6 map_fd_ = *other->GetFdMapPtr();
99 6 map_refcount_ = *other->GetRefcountMapPtr();
100 6 }
101
102 5120 FdRefcountMgr::~FdRefcountMgr() {
103 5120 pthread_mutex_destroy(lock_cache_refcount_);
104 5120 free(lock_cache_refcount_);
105 5120 }
106
107
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 5123 FdRefcountMgr::FdRefcountMgr() {
108
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 5123 const shash::Any hash_null;
109
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 5123 map_fd_.Init(16, hash_null, hasher_any);
110
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 5123 map_refcount_.Init(16, -1, hasher_int);
111 5123 lock_cache_refcount_ = reinterpret_cast<pthread_mutex_t *>(
112 5123 smalloc(sizeof(pthread_mutex_t)));
113 5123 const int retval = pthread_mutex_init(lock_cache_refcount_, NULL);
114
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 5123 assert(retval == 0);
115 5123 }
116
117 6 FdRefcountMgr::FdRefcountMgr(
118 const SmallHashDynamic<int, FdRefcountMgr::FdRefcountInfo> &map_refcount,
119
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 6 const SmallHashDynamic<shash::Any, int> &map_fd) {
120
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 6 const shash::Any hash_null;
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 6 map_fd_.Init(16, hash_null, hasher_any);
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 6 map_refcount_.Init(16, -1, hasher_int);
123
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 6 map_refcount_ = map_refcount;
124
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 6 map_fd_ = map_fd;
125 6 lock_cache_refcount_ = reinterpret_cast<pthread_mutex_t *>(
126 6 smalloc(sizeof(pthread_mutex_t)));
127 6 const int retval = pthread_mutex_init(lock_cache_refcount_, NULL);
128
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 6 assert(retval == 0);
129 6 }
130