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 #define LTTNG_MOD_REQUIRED 1
29 #define LTTNG_MOD_OPTIONAL 0
31 /* LTTng kernel tracer mandatory core modules list */
32 struct kern_modules_param kern_modules_control_core
[] = {
33 { "lttng-tracer" }, /* MUST be loaded first so keep at top */
34 { "lttng-lib-ring-buffer" },
35 { "lttng-ring-buffer-client-discard" },
36 { "lttng-ring-buffer-client-overwrite" },
37 { "lttng-ring-buffer-metadata-client" },
38 { "lttng-ring-buffer-client-mmap-discard" },
39 { "lttng-ring-buffer-client-mmap-overwrite" },
40 { "lttng-ring-buffer-metadata-mmap-client" },
43 /* LTTng kernel tracer optional base modules list */
44 struct kern_modules_param kern_modules_control_opt
[] = {
48 { "lttng-kretprobes" },
51 /* LTTng kernel tracer probe modules list */
52 const struct kern_modules_param kern_modules_probes
[] = {
53 { "lttng-probe-asoc" },
54 { "lttng-probe-block" },
55 { "lttng-probe-btrfs" },
56 { "lttng-probe-compaction" },
57 { "lttng-probe-ext3" },
58 { "lttng-probe-ext4" },
59 { "lttng-probe-gpio" },
60 { "lttng-probe-irq" },
61 { "lttng-probe-jbd" },
62 { "lttng-probe-jbd2" },
63 { "lttng-probe-kmem" },
64 { "lttng-probe-kvm" },
65 { "lttng-probe-kvm-x86" },
66 { "lttng-probe-kvm-x86-mmu" },
67 { "lttng-probe-lock" },
68 { "lttng-probe-module" },
69 { "lttng-probe-napi" },
70 { "lttng-probe-net" },
71 { "lttng-probe-power" },
72 { "lttng-probe-printk" },
73 { "lttng-probe-random" },
74 { "lttng-probe-rcu" },
75 { "lttng-probe-regmap" },
76 { "lttng-probe-regulator" },
77 { "lttng-probe-rpm" },
78 { "lttng-probe-sched" },
79 { "lttng-probe-scsi" },
80 { "lttng-probe-signal" },
81 { "lttng-probe-skb" },
82 { "lttng-probe-sock" },
83 { "lttng-probe-statedump" },
84 { "lttng-probe-sunrpc" },
85 { "lttng-probe-timer" },
86 { "lttng-probe-udp" },
87 { "lttng-probe-vmscan" },
88 { "lttng-probe-v4l2" },
89 { "lttng-probe-workqueue" },
90 { "lttng-probe-writeback" },
93 void modprobe_remove_lttng(const struct kern_modules_param
*modules
,
94 int entries
, int required
)
99 for (i
= entries
- 1; i
>= 0; i
--) {
100 ret
= snprintf(modprobe
, sizeof(modprobe
),
101 "/sbin/modprobe -r -q %s",
104 PERROR("snprintf modprobe -r");
107 modprobe
[sizeof(modprobe
) - 1] = '\0';
108 ret
= system(modprobe
);
110 ERR("Unable to launch modprobe -r for module %s",
112 } else if (required
&& WEXITSTATUS(ret
) != 0) {
113 ERR("Unable to remove module %s",
116 DBG("Modprobe removal successful %s",
123 * Remove control kernel module(s) in reverse load order.
125 void modprobe_remove_lttng_control(void)
127 modprobe_remove_lttng(kern_modules_control_opt
,
128 ARRAY_SIZE(kern_modules_control_opt
),
130 modprobe_remove_lttng(kern_modules_control_core
,
131 ARRAY_SIZE(kern_modules_control_core
),
136 * Remove data kernel modules in reverse load order.
138 void modprobe_remove_lttng_data(void)
140 return modprobe_remove_lttng(kern_modules_probes
,
141 ARRAY_SIZE(kern_modules_probes
),
146 * Remove all kernel modules in reverse order.
148 void modprobe_remove_lttng_all(void)
150 modprobe_remove_lttng_data();
151 modprobe_remove_lttng_control();
154 static int modprobe_lttng(const struct kern_modules_param
*modules
,
155 int entries
, int required
)
160 for (i
= 0; i
< entries
; i
++) {
161 ret
= snprintf(modprobe
, sizeof(modprobe
),
162 "/sbin/modprobe %s%s",
163 required
? "" : "-q ",
166 PERROR("snprintf modprobe");
169 modprobe
[sizeof(modprobe
) - 1] = '\0';
170 ret
= system(modprobe
);
172 ERR("Unable to launch modprobe for module %s",
174 } else if (required
&& WEXITSTATUS(ret
) != 0) {
175 ERR("Unable to load module %s", modules
[i
].name
);
177 DBG("Modprobe successfully %s", modules
[i
].name
);
186 * Load control kernel module(s).
188 int modprobe_lttng_control(void)
192 ret
= modprobe_lttng(kern_modules_control_core
,
193 ARRAY_SIZE(kern_modules_control_core
),
197 ret
= modprobe_lttng(kern_modules_control_opt
,
198 ARRAY_SIZE(kern_modules_control_opt
),
204 * Load data kernel module(s).
206 int modprobe_lttng_data(void)
208 return modprobe_lttng(kern_modules_probes
,
209 ARRAY_SIZE(kern_modules_probes
),