2 * Copyright (C) 2011 - David Goulet <dgoulet@efficios.com>
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the Free
6 * Software Foundation; only version 2 of the License.
8 * This program is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
15 * Place - Suite 330, Boston, MA 02111-1307, USA.
23 #include <common/common.h>
26 #include "kern-modules.h"
28 /* MUST be loaded first */
29 const struct kern_modules_param kern_modules_control
[] = {
30 { "lttng-tracer", 1 },
33 /* LTTng kernel tracer modules list */
34 const struct kern_modules_param kern_modules_list
[] = {
35 { "lttng-ftrace", 0 },
36 { "lttng-kprobes", 0 },
37 { "lttng-kretprobes", 0 },
38 { "lttng-lib-ring-buffer", 1 },
39 { "lttng-ring-buffer-client-discard", 1 },
40 { "lttng-ring-buffer-client-overwrite", 1 },
41 { "lttng-ring-buffer-metadata-client", 1 },
42 { "lttng-ring-buffer-client-mmap-discard", 1 },
43 { "lttng-ring-buffer-client-mmap-overwrite", 1 },
44 { "lttng-ring-buffer-metadata-mmap-client", 1 },
45 { "lttng-probe-lttng", 1 },
47 { "lttng-probe-block", 0 },
48 { "lttng-probe-irq", 0 },
49 { "lttng-probe-kvm", 0 },
50 { "lttng-probe-sched", 0 },
51 { "lttng-probe-signal", 0 },
52 { "lttng-probe-statedump", 0 },
56 * Remove control kernel module(s) in reverse load order.
58 void modprobe_remove_lttng_control(void)
63 for (i
= ARRAY_SIZE(kern_modules_control
) - 1; i
>= 0; i
--) {
64 ret
= snprintf(modprobe
, sizeof(modprobe
),
65 "/sbin/modprobe -r -q %s",
66 kern_modules_control
[i
].name
);
68 PERROR("snprintf modprobe -r");
71 modprobe
[sizeof(modprobe
) - 1] = '\0';
72 ret
= system(modprobe
);
74 ERR("Unable to launch modprobe -r for module %s",
75 kern_modules_control
[i
].name
);
76 } else if (kern_modules_control
[i
].required
77 && WEXITSTATUS(ret
) != 0) {
78 ERR("Unable to remove module %s",
79 kern_modules_control
[i
].name
);
81 DBG("Modprobe removal successful %s",
82 kern_modules_control
[i
].name
);
91 * Remove data kernel modules in reverse load order.
93 void modprobe_remove_lttng_data(void)
98 for (i
= ARRAY_SIZE(kern_modules_list
) - 1; i
>= 0; i
--) {
99 ret
= snprintf(modprobe
, sizeof(modprobe
),
100 "/sbin/modprobe -r -q %s",
101 kern_modules_list
[i
].name
);
103 perror("snprintf modprobe -r");
106 modprobe
[sizeof(modprobe
) - 1] = '\0';
107 ret
= system(modprobe
);
109 ERR("Unable to launch modprobe -r for module %s",
110 kern_modules_list
[i
].name
);
111 } else if (kern_modules_list
[i
].required
112 && WEXITSTATUS(ret
) != 0) {
113 ERR("Unable to remove module %s",
114 kern_modules_list
[i
].name
);
116 DBG("Modprobe removal successful %s",
117 kern_modules_list
[i
].name
);
126 * Remove all kernel modules in reverse order.
128 void modprobe_remove_lttng_all(void)
130 modprobe_remove_lttng_data();
131 modprobe_remove_lttng_control();
135 * Load control kernel module(s).
137 int modprobe_lttng_control(void)
142 for (i
= 0; i
< ARRAY_SIZE(kern_modules_control
); i
++) {
143 ret
= snprintf(modprobe
, sizeof(modprobe
),
144 "/sbin/modprobe %s%s",
145 kern_modules_control
[i
].required
? "" : "-q ",
146 kern_modules_control
[i
].name
);
148 PERROR("snprintf modprobe");
151 modprobe
[sizeof(modprobe
) - 1] = '\0';
152 ret
= system(modprobe
);
154 ERR("Unable to launch modprobe for module %s",
155 kern_modules_control
[i
].name
);
156 } else if (kern_modules_control
[i
].required
157 && WEXITSTATUS(ret
) != 0) {
158 ERR("Unable to load module %s",
159 kern_modules_control
[i
].name
);
161 DBG("Modprobe successfully %s",
162 kern_modules_control
[i
].name
);
171 * Load data kernel module(s).
173 int modprobe_lttng_data(void)
178 for (i
= 0; i
< ARRAY_SIZE(kern_modules_list
); i
++) {
179 ret
= snprintf(modprobe
, sizeof(modprobe
),
180 "/sbin/modprobe %s%s",
181 kern_modules_list
[i
].required
? "" : "-q ",
182 kern_modules_list
[i
].name
);
184 perror("snprintf modprobe");
187 modprobe
[sizeof(modprobe
) - 1] = '\0';
188 ret
= system(modprobe
);
190 ERR("Unable to launch modprobe for module %s",
191 kern_modules_list
[i
].name
);
192 } else if (kern_modules_list
[i
].required
193 && WEXITSTATUS(ret
) != 0) {
194 ERR("Unable to load module %s",
195 kern_modules_list
[i
].name
);
197 DBG("Modprobe successfully %s",
198 kern_modules_list
[i
].name
);
207 * Load all lttng kernel modules.
209 int modprobe_lttng_all(void)
213 ret
= modprobe_lttng_control();
218 ret
= modprobe_lttng_data();