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
|
/*
* libxl_logger.c: libxl logger implementation
*
* Copyright (c) 2016 SUSE LINUX Products GmbH, Nuernberg, Germany.
*
* 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.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <libxl.h>
#include "internal.h"
#include "libxl_logger.h"
#include "util/viralloc.h"
#include "util/virfile.h"
#include "util/virhash.h"
#include "util/virthread.h"
#include "util/virtime.h"
#define VIR_FROM_THIS VIR_FROM_LIBXL
VIR_LOG_INIT("libxl.libxl_logger");
typedef struct xentoollog_logger_libvirt xentoollog_logger_libvirt;
struct xentoollog_logger_libvirt {
xentoollog_logger vtable;
xentoollog_level minLevel;
const char *logDir;
/* map storing the opened fds: "domid" -> FILE* */
GHashTable *files;
virMutex tableLock;
FILE *defaultLogFile;
};
static void
libxlLoggerFileFree(void *payload)
{
FILE *file = payload;
VIR_FORCE_FCLOSE(file);
}
G_GNUC_PRINTF(5, 0) static void
libvirt_vmessage(xentoollog_logger *logger_in,
xentoollog_level level,
int errnoval,
const char *context,
const char *format,
va_list args)
{
xentoollog_logger_libvirt *lg = (xentoollog_logger_libvirt *)logger_in;
FILE *logFile = lg->defaultLogFile;
char timestamp[VIR_TIME_STRING_BUFLEN];
g_autofree char *message = NULL;
char *start, *end;
VIR_DEBUG("libvirt_vmessage: context='%s' format='%s'", context, format);
if (level < lg->minLevel)
return;
message = g_strdup_vprintf(format, args);
/* Should we print to a domain-specific log file? */
if ((start = strstr(message, ": Domain ")) &&
(end = strstr(start + 9, ":"))) {
FILE *domainLogFile = NULL;
VIR_DEBUG("Found domain log message");
start = start + 9;
*end = '\0';
VIR_WITH_MUTEX_LOCK_GUARD(&lg->tableLock) {
domainLogFile = virHashLookup(lg->files, start);
}
if (domainLogFile)
logFile = domainLogFile;
*end = ':';
}
/* Do the actual print to the log file */
if (virTimeStringNowRaw(timestamp) < 0)
timestamp[0] = '\0';
fprintf(logFile, "%s: ", timestamp);
if (context)
fprintf(logFile, "%s: ", context);
fprintf(logFile, "%s", message);
if (errnoval >= 0)
fprintf(logFile, ": %s", g_strerror(errnoval));
fputc('\n', logFile);
fflush(logFile);
}
static void
libvirt_progress(xentoollog_logger *logger_in G_GNUC_UNUSED,
const char *context G_GNUC_UNUSED,
const char *doingwhat G_GNUC_UNUSED,
int percent G_GNUC_UNUSED,
unsigned long done G_GNUC_UNUSED,
unsigned long total G_GNUC_UNUSED)
{
/* This function purposedly does nothing: it's no logging info */
}
static void
libvirt_destroy(xentoollog_logger *logger_in)
{
xentoollog_logger_libvirt *lg = (xentoollog_logger_libvirt*)logger_in;
VIR_FREE(lg);
}
libxlLogger *
libxlLoggerNew(const char *logDir, virLogPriority minLevel)
{
xentoollog_logger_libvirt logger;
g_autofree char *path = NULL;
switch (minLevel) {
case VIR_LOG_DEBUG:
logger.minLevel = XTL_DEBUG;
break;
case VIR_LOG_INFO:
logger.minLevel = XTL_INFO;
break;
case VIR_LOG_WARN:
logger.minLevel = XTL_WARN;
break;
case VIR_LOG_ERROR:
logger.minLevel = XTL_ERROR;
break;
}
logger.logDir = logDir;
path = g_strdup_printf("%s/libxl-driver.log", logDir);
if ((logger.defaultLogFile = fopen(path, "a")) == NULL)
return NULL;
if (virMutexInit(&logger.tableLock) < 0) {
VIR_FORCE_FCLOSE(logger.defaultLogFile);
return NULL;
}
logger.files = virHashNew(libxlLoggerFileFree);
return XTL_NEW_LOGGER(libvirt, logger);
}
void
libxlLoggerFree(libxlLogger *logger)
{
xentoollog_logger *xtl_logger = (xentoollog_logger*)logger;
if (logger->defaultLogFile)
VIR_FORCE_FCLOSE(logger->defaultLogFile);
g_clear_pointer(&logger->files, g_hash_table_unref);
virMutexDestroy(&logger->tableLock);
xtl_logger_destroy(xtl_logger);
}
void
libxlLoggerOpenFile(libxlLogger *logger,
int id,
const char *name,
const char *domain_config)
{
g_autofree char *path = NULL;
FILE *logFile = NULL;
g_autofree char *domidstr = NULL;
path = g_strdup_printf("%s/%s.log", logger->logDir, name);
domidstr = g_strdup_printf("%d", id);
if (!(logFile = fopen(path, "a"))) {
VIR_WARN("Failed to open log file %s: %s",
path, g_strerror(errno));
return;
}
VIR_WITH_MUTEX_LOCK_GUARD(&logger->tableLock) {
ignore_value(virHashAddEntry(logger->files, domidstr, logFile));
}
/* domain_config is non NULL only when starting a new domain */
if (domain_config) {
fprintf(logFile, "Domain start: %s\n", domain_config);
fflush(logFile);
}
}
void
libxlLoggerCloseFile(libxlLogger *logger, int id)
{
g_autofree char *domidstr = g_strdup_printf("%d", id);
VIR_LOCK_GUARD lock = virLockGuardLock(&logger->tableLock);
ignore_value(virHashRemoveEntry(logger->files, domidstr));
}
|
