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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2007 InspIRCd Development Team
* See: http://www.inspircd.org/wiki/index.php/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "inspircd.h"
#include <sys/epoll.h>
#include "socketengine_epoll.h"
EPollEngine::EPollEngine(InspIRCd* Instance) : SocketEngine(Instance)
{
EngineHandle = epoll_create(MAX_DESCRIPTORS);
if (EngineHandle == -1)
{
ServerInstance->Log(SPARSE,"ERROR: Could not initialize socket engine. Your kernel probably does not have the proper features.");
ServerInstance->Log(SPARSE,"ERROR: this is a fatal error, exiting now.");
printf("ERROR: Could not initialize socket engine. Your kernel probably does not have the proper features.");
printf("ERROR: this is a fatal error, exiting now.");
InspIRCd::Exit(ERROR);
}
CurrentSetSize = 0;
}
EPollEngine::~EPollEngine()
{
close(EngineHandle);
}
bool EPollEngine::AddFd(EventHandler* eh)
{
int fd = eh->GetFd();
if ((fd < 0) || (fd > MAX_DESCRIPTORS))
{
ServerInstance->Log(DEBUG,"ERROR: FD of %d added above max of %d",fd,MAX_DESCRIPTORS);
return false;
}
if (GetRemainingFds() <= 1)
{
ServerInstance->Log(DEBUG,"ERROR: System out of file descriptors!");
return false;
}
if (ref[fd])
{
ServerInstance->Log(DEBUG,"Slot %d already occupied",fd);
return false;
}
ref[fd] = eh;
ServerInstance->Log(DEBUG,"***** Add socket %d",fd);
struct epoll_event ev;
memset(&ev,0,sizeof(struct epoll_event));
ServerInstance->Log(DEBUG,"epoll: Add socket to events, ep=%d socket=%d",EngineHandle,fd);
eh->Readable() ? ev.events = EPOLLIN : ev.events = EPOLLOUT;
ev.data.fd = fd;
int i = epoll_ctl(EngineHandle, EPOLL_CTL_ADD, fd, &ev);
if (i < 0)
{
ServerInstance->Log(DEBUG,"epoll: List insertion failure!");
return false;
}
CurrentSetSize++;
return true;
}
void EPollEngine::WantWrite(EventHandler* eh)
{
/** Use oneshot so that the system removes the writeable
* status for us and saves us a call.
*/
struct epoll_event ev;
memset(&ev,0,sizeof(struct epoll_event));
ev.events = EPOLLOUT;
ev.data.fd = eh->GetFd();
int i = epoll_ctl(EngineHandle, EPOLL_CTL_MOD, eh->GetFd(), &ev);
if (i < 0)
{
ServerInstance->Log(DEBUG,"epoll: Could not set want write on fd %d!",eh->GetFd());
}
}
bool EPollEngine::DelFd(EventHandler* eh)
{
ServerInstance->Log(DEBUG,"EPollEngine::DelFd(%d)",eh->GetFd());
int fd = eh->GetFd();
if ((fd < 0) || (fd > MAX_DESCRIPTORS))
return false;
struct epoll_event ev;
memset(&ev,0,sizeof(struct epoll_event));
eh->Readable() ? ev.events = EPOLLIN : ev.events = EPOLLOUT;
ev.data.fd = fd;
int i = epoll_ctl(EngineHandle, EPOLL_CTL_DEL, fd, &ev);
if (i < 0)
{
ServerInstance->Log(DEBUG,"epoll: List deletion failure: %s",strerror(errno));
return false;
}
CurrentSetSize--;
ref[fd] = NULL;
return true;
}
int EPollEngine::GetMaxFds()
{
return MAX_DESCRIPTORS;
}
int EPollEngine::GetRemainingFds()
{
return MAX_DESCRIPTORS - CurrentSetSize;
}
int EPollEngine::DispatchEvents()
{
socklen_t codesize;
int errcode;
int i = epoll_wait(EngineHandle, events, MAX_DESCRIPTORS, 150);
for (int j = 0; j < i; j++)
{
ServerInstance->Log(DEBUG,"Handle %s event on fd %d",events[j].events & EPOLLOUT ? "write" : "read", events[j].data.fd);
if (events[j].events & EPOLLHUP)
{
ServerInstance->Log(DEBUG,"Handle error event on fd %d", events[j].data.fd);
if (ref[events[j].data.fd])
ref[events[j].data.fd]->HandleEvent(EVENT_ERROR, 0);
continue;
}
if (events[j].events & EPOLLERR)
{
/* Get error number */
if (getsockopt(events[j].data.fd, SOL_SOCKET, SO_ERROR, &errcode, &codesize) < 0)
errcode = errno;
ServerInstance->Log(DEBUG,"Handle error event on fd %d: %s", events[j].data.fd, strerror(errcode));
if (ref[events[j].data.fd])
ref[events[j].data.fd]->HandleEvent(EVENT_ERROR, errcode);
continue;
}
if (events[j].events & EPOLLOUT)
{
struct epoll_event ev;
memset(&ev,0,sizeof(struct epoll_event));
ev.events = EPOLLIN;
ev.data.fd = events[j].data.fd;
int i = epoll_ctl(EngineHandle, EPOLL_CTL_MOD, events[j].data.fd, &ev);
if (i < 0)
{
ServerInstance->Log(DEBUG,"epoll: Could not reset fd %d!", events[j].data.fd);
}
if (ref[events[j].data.fd])
ref[events[j].data.fd]->HandleEvent(EVENT_WRITE);
}
else
{
if (ref[events[j].data.fd])
ref[events[j].data.fd]->HandleEvent(EVENT_READ);
}
}
return i;
}
std::string EPollEngine::GetName()
{
return "epoll";
}
|
