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
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph distributed storage system
*
* Copyright (C) 2013,2014 Cloudwatt <libre.licensing@cloudwatt.com>
* Copyright (C) 2014 Red Hat <contact@redhat.com>
*
* Author: Loic Dachary <loic@dachary.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
*/
#include "PluginRegistry.h"
#include "ceph_ver.h"
#include "common/ceph_context.h"
#include "common/errno.h"
#include "common/debug.h"
#include <dlfcn.h>
#define PLUGIN_PREFIX "libceph_"
#ifdef __APPLE__
#define PLUGIN_SUFFIX ".dylib"
#else
#define PLUGIN_SUFFIX ".so"
#endif
#define PLUGIN_INIT_FUNCTION "__ceph_plugin_init"
#define PLUGIN_VERSION_FUNCTION "__ceph_plugin_version"
#define dout_subsys ceph_subsys_context
PluginRegistry::PluginRegistry(CephContext *cct) :
cct(cct),
loading(false),
disable_dlclose(false)
{
}
PluginRegistry::~PluginRegistry()
{
if (disable_dlclose)
return;
for (std::map<std::string,std::map<std::string, Plugin*> >::iterator i =
plugins.begin();
i != plugins.end();
++i) {
for (std::map<std::string,Plugin*>::iterator j = i->second.begin();
j != i->second.end(); ++j) {
void *library = j->second->library;
delete j->second;
dlclose(library);
}
}
}
int PluginRegistry::remove(const std::string& type, const std::string& name)
{
ceph_assert(ceph_mutex_is_locked(lock));
std::map<std::string,std::map<std::string,Plugin*> >::iterator i =
plugins.find(type);
if (i == plugins.end())
return -ENOENT;
std::map<std::string,Plugin*>::iterator j = i->second.find(name);
if (j == i->second.end())
return -ENOENT;
ldout(cct, 1) << __func__ << " " << type << " " << name << dendl;
void *library = j->second->library;
delete j->second;
dlclose(library);
i->second.erase(j);
if (i->second.empty())
plugins.erase(i);
return 0;
}
int PluginRegistry::add(const std::string& type,
const std::string& name,
Plugin* plugin)
{
ceph_assert(ceph_mutex_is_locked(lock));
if (plugins.count(type) &&
plugins[type].count(name)) {
return -EEXIST;
}
ldout(cct, 1) << __func__ << " " << type << " " << name
<< " " << plugin << dendl;
plugins[type][name] = plugin;
return 0;
}
Plugin *PluginRegistry::get_with_load(const std::string& type,
const std::string& name)
{
std::lock_guard l(lock);
Plugin* ret = get(type, name);
if (!ret) {
int err = load(type, name);
if (err == 0)
ret = get(type, name);
}
return ret;
}
Plugin *PluginRegistry::get(const std::string& type,
const std::string& name)
{
ceph_assert(ceph_mutex_is_locked(lock));
Plugin *ret = 0;
std::map<std::string,Plugin*>::iterator j;
std::map<std::string,map<std::string,Plugin*> >::iterator i =
plugins.find(type);
if (i == plugins.end())
goto out;
j = i->second.find(name);
if (j == i->second.end())
goto out;
ret = j->second;
out:
ldout(cct, 1) << __func__ << " " << type << " " << name
<< " = " << ret << dendl;
return ret;
}
int PluginRegistry::load(const std::string &type,
const std::string &name)
{
ceph_assert(ceph_mutex_is_locked(lock));
ldout(cct, 1) << __func__ << " " << type << " " << name << dendl;
// std::string fname = cct->_conf->plugin_dir + "/" + type + "/" PLUGIN_PREFIX
// + name + PLUGIN_SUFFIX;
std::string fname = cct->_conf.get_val<std::string>("plugin_dir") + "/" + type + "/" + PLUGIN_PREFIX
+ name + PLUGIN_SUFFIX;
void *library = dlopen(fname.c_str(), RTLD_NOW);
if (!library) {
string err1(dlerror());
// fall back to plugin_dir
std::string fname2 = cct->_conf.get_val<std::string>("plugin_dir") + "/" + PLUGIN_PREFIX +
name + PLUGIN_SUFFIX;
library = dlopen(fname2.c_str(), RTLD_NOW);
if (!library) {
lderr(cct) << __func__
<< " failed dlopen(): \"" << err1.c_str()
<< "\" or \"" << dlerror() << "\""
<< dendl;
return -EIO;
}
}
const char * (*code_version)() =
(const char *(*)())dlsym(library, PLUGIN_VERSION_FUNCTION);
if (code_version == NULL) {
lderr(cct) << __func__ << " code_version == NULL" << dlerror() << dendl;
return -EXDEV;
}
if (code_version() != string(CEPH_GIT_NICE_VER)) {
lderr(cct) << __func__ << " plugin " << fname << " version "
<< code_version() << " != expected "
<< CEPH_GIT_NICE_VER << dendl;
dlclose(library);
return -EXDEV;
}
int (*code_init)(CephContext *,
const std::string& type,
const std::string& name) =
(int (*)(CephContext *,
const std::string& type,
const std::string& name))dlsym(library, PLUGIN_INIT_FUNCTION);
if (code_init) {
int r = code_init(cct, type, name);
if (r != 0) {
lderr(cct) << __func__ << " " << fname << " "
<< PLUGIN_INIT_FUNCTION << "(" << cct
<< "," << type << "," << name << "): " << cpp_strerror(r)
<< dendl;
dlclose(library);
return r;
}
} else {
lderr(cct) << __func__ << " " << fname << " dlsym(" << PLUGIN_INIT_FUNCTION
<< "): " << dlerror() << dendl;
dlclose(library);
return -ENOENT;
}
Plugin *plugin = get(type, name);
if (plugin == 0) {
lderr(cct) << __func__ << " " << fname << " "
<< PLUGIN_INIT_FUNCTION << "()"
<< "did not register plugin type " << type << " name " << name
<< dendl;
dlclose(library);
return -EBADF;
}
plugin->library = library;
ldout(cct, 1) << __func__ << ": " << type << " " << name
<< " loaded and registered" << dendl;
return 0;
}
/*
int ErasureCodePluginRegistry::preload(const std::string &plugins,
const std::string &directory,
ostream &ss)
{
std::lock_guard l(lock);
list<string> plugins_list;
get_str_list(plugins, plugins_list);
for (list<string>::iterator i = plugins_list.begin();
i != plugins_list.end();
++i) {
ErasureCodePlugin *plugin;
int r = load(*i, directory, &plugin, ss);
if (r)
return r;
}
return 0;
}
*/
|
