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-kvm-x86", 0 },
59 { "lttng-probe-kvm-x86-mmu", 0 },
60 { "lttng-probe-lock", 0 },
61 { "lttng-probe-module", 0 },
62 { "lttng-probe-napi", 0 },
63 { "lttng-probe-net", 0 },
64 { "lttng-probe-power", 0 },
65 { "lttng-probe-printk", 0 },
66 { "lttng-probe-random", 0 },
67 { "lttng-probe-rcu", 0 },
68 { "lttng-probe-regmap", 0 },
69 { "lttng-probe-regulator", 0 },
70 { "lttng-probe-rpm", 0 },
71 { "lttng-probe-sched", 0 },
72 { "lttng-probe-scsi", 0 },
73 { "lttng-probe-signal", 0 },
74 { "lttng-probe-skb", 0 },
75 { "lttng-probe-sock", 0 },
76 { "lttng-probe-statedump", 0 },
77 { "lttng-probe-sunrpc", 0 },
78 { "lttng-probe-timer", 0 },
79 { "lttng-probe-udp", 0 },
80 { "lttng-probe-vmscan", 0 },
81 { "lttng-probe-v4l2", 0 },
82 { "lttng-probe-workqueue", 0 },
83 { "lttng-probe-writeback", 0 },
87 * Remove control kernel module(s) in reverse load order.
89 void modprobe_remove_lttng_control(void)
94 for (i
= ARRAY_SIZE(kern_modules_control
) - 1; i
>= 0; i
--) {
95 ret
= snprintf(modprobe
, sizeof(modprobe
),
96 "/sbin/modprobe -r -q %s",
97 kern_modules_control
[i
].name
);
99 PERROR("snprintf modprobe -r");
102 modprobe
[sizeof(modprobe
) - 1] = '\0';
103 ret
= system(modprobe
);
105 ERR("Unable to launch modprobe -r for module %s",
106 kern_modules_control
[i
].name
);
107 } else if (kern_modules_control
[i
].required
108 && WEXITSTATUS(ret
) != 0) {
109 ERR("Unable to remove module %s",
110 kern_modules_control
[i
].name
);
112 DBG("Modprobe removal successful %s",
113 kern_modules_control
[i
].name
);
122 * Remove data kernel modules in reverse load order.
124 void modprobe_remove_lttng_data(void)
129 for (i
= ARRAY_SIZE(kern_modules_list
) - 1; i
>= 0; i
--) {
130 ret
= snprintf(modprobe
, sizeof(modprobe
),
131 "/sbin/modprobe -r -q %s",
132 kern_modules_list
[i
].name
);
134 PERROR("snprintf modprobe -r");
137 modprobe
[sizeof(modprobe
) - 1] = '\0';
138 ret
= system(modprobe
);
140 ERR("Unable to launch modprobe -r for module %s",
141 kern_modules_list
[i
].name
);
142 } else if (kern_modules_list
[i
].required
143 && WEXITSTATUS(ret
) != 0) {
144 ERR("Unable to remove module %s",
145 kern_modules_list
[i
].name
);
147 DBG("Modprobe removal successful %s",
148 kern_modules_list
[i
].name
);
157 * Remove all kernel modules in reverse order.
159 void modprobe_remove_lttng_all(void)
161 modprobe_remove_lttng_data();
162 modprobe_remove_lttng_control();
166 * Load control kernel module(s).
168 int modprobe_lttng_control(void)
173 for (i
= 0; i
< ARRAY_SIZE(kern_modules_control
); i
++) {
174 ret
= snprintf(modprobe
, sizeof(modprobe
),
175 "/sbin/modprobe %s%s",
176 kern_modules_control
[i
].required
? "" : "-q ",
177 kern_modules_control
[i
].name
);
179 PERROR("snprintf modprobe");
182 modprobe
[sizeof(modprobe
) - 1] = '\0';
183 ret
= system(modprobe
);
185 ERR("Unable to launch modprobe for module %s",
186 kern_modules_control
[i
].name
);
187 } else if (kern_modules_control
[i
].required
188 && WEXITSTATUS(ret
) != 0) {
189 ERR("Unable to load module %s",
190 kern_modules_control
[i
].name
);
192 DBG("Modprobe successfully %s",
193 kern_modules_control
[i
].name
);
202 * Load data kernel module(s).
204 int modprobe_lttng_data(void)
209 for (i
= 0; i
< ARRAY_SIZE(kern_modules_list
); i
++) {
210 ret
= snprintf(modprobe
, sizeof(modprobe
),
211 "/sbin/modprobe %s%s",
212 kern_modules_list
[i
].required
? "" : "-q ",
213 kern_modules_list
[i
].name
);
215 PERROR("snprintf modprobe");
218 modprobe
[sizeof(modprobe
) - 1] = '\0';
219 ret
= system(modprobe
);
221 ERR("Unable to launch modprobe for module %s",
222 kern_modules_list
[i
].name
);
223 } else if (kern_modules_list
[i
].required
224 && WEXITSTATUS(ret
) != 0) {
225 ERR("Unable to load module %s",
226 kern_modules_list
[i
].name
);
228 DBG("Modprobe successfully %s",
229 kern_modules_list
[i
].name
);