2 * Copyright (C) 2011 - David Goulet <dgoulet@efficios.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License, version 2 only,
6 * as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 },
46 { "lttng-probe-asoc", 0 },
47 { "lttng-probe-block", 0 },
48 { "lttng-probe-btrfs", 0 },
49 { "lttng-probe-compaction", 0 },
50 { "lttng-probe-ext3", 0 },
51 { "lttng-probe-ext4", 0 },
52 { "lttng-probe-gpio", 0 },
53 { "lttng-probe-irq", 0 },
54 { "lttng-probe-jbd", 0 },
55 { "lttng-probe-jbd2", 0 },
56 { "lttng-probe-kmem", 0 },
57 { "lttng-probe-kvm", 0 },
58 { "lttng-probe-lock", 0 },
59 { "lttng-probe-module", 0 },
60 { "lttng-probe-napi", 0 },
61 { "lttng-probe-net", 0 },
62 { "lttng-probe-power", 0 },
63 { "lttng-probe-printk", 0 },
64 { "lttng-probe-random", 0 },
65 { "lttng-probe-rcu", 0 },
66 { "lttng-probe-regmap", 0 },
67 { "lttng-probe-regulator", 0 },
68 { "lttng-probe-rpm", 0 },
69 { "lttng-probe-sched", 0 },
70 { "lttng-probe-scsi", 0 },
71 { "lttng-probe-signal", 0 },
72 { "lttng-probe-skb", 0 },
73 { "lttng-probe-sock", 0 },
74 { "lttng-probe-statedump", 0 },
75 { "lttng-probe-sunrpc", 0 },
76 { "lttng-probe-timer", 0 },
77 { "lttng-probe-udp", 0 },
78 { "lttng-probe-vmscan", 0 },
79 { "lttng-probe-workqueue", 0 },
80 { "lttng-probe-writeback", 0 },
84 * Remove control kernel module(s) in reverse load order.
86 void modprobe_remove_lttng_control(void)
91 for (i
= ARRAY_SIZE(kern_modules_control
) - 1; i
>= 0; i
--) {
92 ret
= snprintf(modprobe
, sizeof(modprobe
),
93 "/sbin/modprobe -r -q %s",
94 kern_modules_control
[i
].name
);
96 PERROR("snprintf modprobe -r");
99 modprobe
[sizeof(modprobe
) - 1] = '\0';
100 ret
= system(modprobe
);
102 ERR("Unable to launch modprobe -r for module %s",
103 kern_modules_control
[i
].name
);
104 } else if (kern_modules_control
[i
].required
105 && WEXITSTATUS(ret
) != 0) {
106 ERR("Unable to remove module %s",
107 kern_modules_control
[i
].name
);
109 DBG("Modprobe removal successful %s",
110 kern_modules_control
[i
].name
);
119 * Remove data kernel modules in reverse load order.
121 void modprobe_remove_lttng_data(void)
126 for (i
= ARRAY_SIZE(kern_modules_list
) - 1; i
>= 0; i
--) {
127 ret
= snprintf(modprobe
, sizeof(modprobe
),
128 "/sbin/modprobe -r -q %s",
129 kern_modules_list
[i
].name
);
131 PERROR("snprintf modprobe -r");
134 modprobe
[sizeof(modprobe
) - 1] = '\0';
135 ret
= system(modprobe
);
137 ERR("Unable to launch modprobe -r for module %s",
138 kern_modules_list
[i
].name
);
139 } else if (kern_modules_list
[i
].required
140 && WEXITSTATUS(ret
) != 0) {
141 ERR("Unable to remove module %s",
142 kern_modules_list
[i
].name
);
144 DBG("Modprobe removal successful %s",
145 kern_modules_list
[i
].name
);
154 * Remove all kernel modules in reverse order.
156 void modprobe_remove_lttng_all(void)
158 modprobe_remove_lttng_data();
159 modprobe_remove_lttng_control();
163 * Load control kernel module(s).
165 int modprobe_lttng_control(void)
170 for (i
= 0; i
< ARRAY_SIZE(kern_modules_control
); i
++) {
171 ret
= snprintf(modprobe
, sizeof(modprobe
),
172 "/sbin/modprobe %s%s",
173 kern_modules_control
[i
].required
? "" : "-q ",
174 kern_modules_control
[i
].name
);
176 PERROR("snprintf modprobe");
179 modprobe
[sizeof(modprobe
) - 1] = '\0';
180 ret
= system(modprobe
);
182 ERR("Unable to launch modprobe for module %s",
183 kern_modules_control
[i
].name
);
184 } else if (kern_modules_control
[i
].required
185 && WEXITSTATUS(ret
) != 0) {
186 ERR("Unable to load module %s",
187 kern_modules_control
[i
].name
);
189 DBG("Modprobe successfully %s",
190 kern_modules_control
[i
].name
);
199 * Load data kernel module(s).
201 int modprobe_lttng_data(void)
206 for (i
= 0; i
< ARRAY_SIZE(kern_modules_list
); i
++) {
207 ret
= snprintf(modprobe
, sizeof(modprobe
),
208 "/sbin/modprobe %s%s",
209 kern_modules_list
[i
].required
? "" : "-q ",
210 kern_modules_list
[i
].name
);
212 PERROR("snprintf modprobe");
215 modprobe
[sizeof(modprobe
) - 1] = '\0';
216 ret
= system(modprobe
);
218 ERR("Unable to launch modprobe for module %s",
219 kern_modules_list
[i
].name
);
220 } else if (kern_modules_list
[i
].required
221 && WEXITSTATUS(ret
) != 0) {
222 ERR("Unable to load module %s",
223 kern_modules_list
[i
].name
);
225 DBG("Modprobe successfully %s",
226 kern_modules_list
[i
].name
);
235 * Load all lttng kernel modules.
237 int modprobe_lttng_all(void)
241 ret
= modprobe_lttng_control();
246 ret
= modprobe_lttng_data();