1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
#include <phosphor-logging/elog-errors.hpp>
#include "xyz/openbmc_project/Common/error.hpp"
#include "watch.hpp"
namespace phosphor
{
namespace dump
{
namespace inotify
{
using namespace std::string_literals;
using namespace phosphor::logging;
using namespace sdbusplus::xyz::openbmc_project::Common::Error;
Watch::~Watch()
{
if ((fd() >= 0) && (wd >= 0))
{
inotify_rm_watch(fd(), wd);
}
}
Watch::Watch(const EventPtr& eventObj,
const int flags,
const uint32_t mask,
const uint32_t events,
const fs::path& path,
UserType userFunc):
flags(flags),
mask(mask),
events(events),
path(path),
fd(inotifyInit()),
userFunc(userFunc)
{
// Check if watch DIR exists.
if (!fs::is_directory(path))
{
log<level::ERR>("Watch directory doesn't exist",
entry("DIR=%s", path.c_str()));
elog<InternalFailure>();
}
wd = inotify_add_watch(fd(), path.c_str(), mask);
if (-1 == wd)
{
auto error = errno;
log<level::ERR>("Error occurred during the inotify_add_watch call",
entry("ERRNO=%d", error));
elog<InternalFailure>();
}
auto rc = sd_event_add_io(eventObj.get(),
nullptr,
fd(),
events,
callback,
this);
if (0 > rc)
{
// Failed to add to event loop
log<level::ERR>("Error occurred during the sd_event_add_io call",
entry("RC=%d", rc));
elog<InternalFailure>();
}
}
int Watch::inotifyInit()
{
auto fd = inotify_init1(flags);
if (-1 == fd)
{
auto error = errno;
log<level::ERR>("Error occurred during the inotify_init1",
entry("ERRNO=%d", error));
elog<InternalFailure>();
}
return fd;
}
int Watch::callback(sd_event_source* s,
int fd,
uint32_t revents,
void* userdata)
{
auto userData = static_cast<Watch*>(userdata);
if (!(revents & userData->events))
{
return 0;
}
//Maximum inotify events supported in the buffer
constexpr auto maxBytes = sizeof(struct inotify_event) + NAME_MAX + 1;
uint8_t buffer[maxBytes];
auto bytes = read(fd, buffer, maxBytes);
if (0 > bytes)
{
//Failed to read inotify event
//Report error and return
auto error = errno;
log<level::ERR>("Error occurred during the read",
entry("ERRNO=%d", error));
report<InternalFailure>();
return 0;
}
auto offset = 0;
UserMap userMap;
while (offset < bytes)
{
auto event = reinterpret_cast<inotify_event*>(&buffer[offset]);
auto mask = event->mask & userData->mask;
if (mask)
{
userMap.emplace(
(userData->path / event->name), mask);
}
offset += offsetof(inotify_event, name) + event->len;
}
//Call user call back function in case valid data in the map
if (!userMap.empty())
{
userData->userFunc(userMap);
}
return 0;
}
} // namespace inotify
} // namespace dump
} // namespace phosphor
|
