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096102bd DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <dgoulet@efficios.com> | |
3 | * | |
d14d33bf AM |
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. | |
096102bd | 7 | * |
d14d33bf AM |
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. | |
096102bd | 12 | * |
d14d33bf AM |
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. | |
096102bd DG |
16 | */ |
17 | ||
18 | #define _GNU_SOURCE | |
19 | #include <stdio.h> | |
20 | #include <stdlib.h> | |
21 | #include <sys/wait.h> | |
22 | ||
23 | #include <common/common.h> | |
24 | ||
25 | #include "modprobe.h" | |
26 | #include "kern-modules.h" | |
27 | ||
28 | /* MUST be loaded first */ | |
29 | const struct kern_modules_param kern_modules_control[] = { | |
d8e76ef6 | 30 | { "lttng-tracer", 1 }, |
096102bd DG |
31 | }; |
32 | ||
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 }, | |
d8e76ef6 DG |
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 }, | |
096102bd DG |
45 | { "lttng-probe-lttng", 1 }, |
46 | { "lttng-types", 0 }, | |
07e716ec | 47 | { "lttng-probe-asoc", 0 }, |
096102bd | 48 | { "lttng-probe-block", 0 }, |
07e716ec WP |
49 | { "lttng-probe-ext3", 0 }, |
50 | { "lttng-probe-gpio", 0 }, | |
096102bd | 51 | { "lttng-probe-irq", 0 }, |
07e716ec WP |
52 | { "lttng-probe-jbd", 0 }, |
53 | { "lttng-probe-jbd2", 0 }, | |
54 | { "lttng-probe-kmem", 0 }, | |
096102bd | 55 | { "lttng-probe-kvm", 0 }, |
07e716ec | 56 | { "lttng-probe-lock", 0 }, |
e3e57ea7 | 57 | { "lttng-probe-module", 0 }, |
07e716ec WP |
58 | { "lttng-probe-napi", 0 }, |
59 | { "lttng-probe-net", 0 }, | |
60 | { "lttng-probe-power", 0 }, | |
61 | { "lttng-probe-regulator", 0 }, | |
096102bd | 62 | { "lttng-probe-sched", 0 }, |
07e716ec | 63 | { "lttng-probe-scsi", 0 }, |
9ae7d41d | 64 | { "lttng-probe-signal", 0 }, |
07e716ec WP |
65 | { "lttng-probe-skb", 0 }, |
66 | { "lttng-probe-sock", 0 }, | |
bd9b9e63 | 67 | { "lttng-probe-statedump", 0 }, |
7ec24b77 | 68 | { "lttng-probe-timer", 0 }, |
07e716ec WP |
69 | { "lttng-probe-udp", 0 }, |
70 | { "lttng-probe-vmscan", 0 }, | |
096102bd DG |
71 | }; |
72 | ||
73 | /* | |
74 | * Remove control kernel module(s) in reverse load order. | |
75 | */ | |
76 | void modprobe_remove_lttng_control(void) | |
77 | { | |
78 | int ret = 0, i; | |
79 | char modprobe[256]; | |
80 | ||
81 | for (i = ARRAY_SIZE(kern_modules_control) - 1; i >= 0; i--) { | |
82 | ret = snprintf(modprobe, sizeof(modprobe), | |
83 | "/sbin/modprobe -r -q %s", | |
84 | kern_modules_control[i].name); | |
85 | if (ret < 0) { | |
86 | PERROR("snprintf modprobe -r"); | |
87 | goto error; | |
88 | } | |
89 | modprobe[sizeof(modprobe) - 1] = '\0'; | |
90 | ret = system(modprobe); | |
91 | if (ret == -1) { | |
92 | ERR("Unable to launch modprobe -r for module %s", | |
93 | kern_modules_control[i].name); | |
94 | } else if (kern_modules_control[i].required | |
95 | && WEXITSTATUS(ret) != 0) { | |
96 | ERR("Unable to remove module %s", | |
97 | kern_modules_control[i].name); | |
98 | } else { | |
99 | DBG("Modprobe removal successful %s", | |
100 | kern_modules_control[i].name); | |
101 | } | |
102 | } | |
103 | ||
104 | error: | |
105 | return; | |
106 | } | |
107 | ||
108 | /* | |
109 | * Remove data kernel modules in reverse load order. | |
110 | */ | |
111 | void modprobe_remove_lttng_data(void) | |
112 | { | |
113 | int ret = 0, i; | |
114 | char modprobe[256]; | |
115 | ||
116 | for (i = ARRAY_SIZE(kern_modules_list) - 1; i >= 0; i--) { | |
117 | ret = snprintf(modprobe, sizeof(modprobe), | |
118 | "/sbin/modprobe -r -q %s", | |
119 | kern_modules_list[i].name); | |
120 | if (ret < 0) { | |
df0f840b | 121 | PERROR("snprintf modprobe -r"); |
096102bd DG |
122 | goto error; |
123 | } | |
124 | modprobe[sizeof(modprobe) - 1] = '\0'; | |
125 | ret = system(modprobe); | |
126 | if (ret == -1) { | |
127 | ERR("Unable to launch modprobe -r for module %s", | |
128 | kern_modules_list[i].name); | |
129 | } else if (kern_modules_list[i].required | |
130 | && WEXITSTATUS(ret) != 0) { | |
131 | ERR("Unable to remove module %s", | |
132 | kern_modules_list[i].name); | |
133 | } else { | |
134 | DBG("Modprobe removal successful %s", | |
135 | kern_modules_list[i].name); | |
136 | } | |
137 | } | |
138 | ||
139 | error: | |
140 | return; | |
141 | } | |
142 | ||
143 | /* | |
144 | * Remove all kernel modules in reverse order. | |
145 | */ | |
146 | void modprobe_remove_lttng_all(void) | |
147 | { | |
148 | modprobe_remove_lttng_data(); | |
149 | modprobe_remove_lttng_control(); | |
150 | } | |
151 | ||
152 | /* | |
153 | * Load control kernel module(s). | |
154 | */ | |
155 | int modprobe_lttng_control(void) | |
156 | { | |
157 | int ret = 0, i; | |
158 | char modprobe[256]; | |
159 | ||
160 | for (i = 0; i < ARRAY_SIZE(kern_modules_control); i++) { | |
161 | ret = snprintf(modprobe, sizeof(modprobe), | |
162 | "/sbin/modprobe %s%s", | |
163 | kern_modules_control[i].required ? "" : "-q ", | |
164 | kern_modules_control[i].name); | |
165 | if (ret < 0) { | |
166 | PERROR("snprintf modprobe"); | |
167 | goto error; | |
168 | } | |
169 | modprobe[sizeof(modprobe) - 1] = '\0'; | |
170 | ret = system(modprobe); | |
171 | if (ret == -1) { | |
172 | ERR("Unable to launch modprobe for module %s", | |
173 | kern_modules_control[i].name); | |
174 | } else if (kern_modules_control[i].required | |
175 | && WEXITSTATUS(ret) != 0) { | |
176 | ERR("Unable to load module %s", | |
177 | kern_modules_control[i].name); | |
178 | } else { | |
179 | DBG("Modprobe successfully %s", | |
180 | kern_modules_control[i].name); | |
181 | } | |
182 | } | |
183 | ||
184 | error: | |
185 | return ret; | |
186 | } | |
187 | ||
188 | /* | |
189 | * Load data kernel module(s). | |
190 | */ | |
191 | int modprobe_lttng_data(void) | |
192 | { | |
193 | int ret = 0, i; | |
194 | char modprobe[256]; | |
195 | ||
196 | for (i = 0; i < ARRAY_SIZE(kern_modules_list); i++) { | |
197 | ret = snprintf(modprobe, sizeof(modprobe), | |
198 | "/sbin/modprobe %s%s", | |
199 | kern_modules_list[i].required ? "" : "-q ", | |
200 | kern_modules_list[i].name); | |
201 | if (ret < 0) { | |
df0f840b | 202 | PERROR("snprintf modprobe"); |
096102bd DG |
203 | goto error; |
204 | } | |
205 | modprobe[sizeof(modprobe) - 1] = '\0'; | |
206 | ret = system(modprobe); | |
207 | if (ret == -1) { | |
208 | ERR("Unable to launch modprobe for module %s", | |
209 | kern_modules_list[i].name); | |
210 | } else if (kern_modules_list[i].required | |
211 | && WEXITSTATUS(ret) != 0) { | |
212 | ERR("Unable to load module %s", | |
213 | kern_modules_list[i].name); | |
214 | } else { | |
215 | DBG("Modprobe successfully %s", | |
216 | kern_modules_list[i].name); | |
217 | } | |
218 | } | |
219 | ||
220 | error: | |
221 | return ret; | |
222 | } | |
223 | ||
224 | /* | |
225 | * Load all lttng kernel modules. | |
226 | */ | |
227 | int modprobe_lttng_all(void) | |
228 | { | |
229 | int ret; | |
230 | ||
231 | ret = modprobe_lttng_control(); | |
232 | if (ret < 0) { | |
233 | goto error; | |
234 | } | |
235 | ||
236 | ret = modprobe_lttng_data(); | |
237 | if (ret < 0) { | |
238 | goto error; | |
239 | } | |
240 | ||
241 | error: | |
242 | return ret; | |
243 | } |