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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 }, | |
47 | { "lttng-probe-block", 0 }, | |
48 | { "lttng-probe-irq", 0 }, | |
49 | { "lttng-probe-kvm", 0 }, | |
50 | { "lttng-probe-sched", 0 }, | |
9ae7d41d | 51 | { "lttng-probe-signal", 0 }, |
bd9b9e63 | 52 | { "lttng-probe-statedump", 0 }, |
7ec24b77 | 53 | { "lttng-probe-timer", 0 }, |
096102bd DG |
54 | }; |
55 | ||
56 | /* | |
57 | * Remove control kernel module(s) in reverse load order. | |
58 | */ | |
59 | void modprobe_remove_lttng_control(void) | |
60 | { | |
61 | int ret = 0, i; | |
62 | char modprobe[256]; | |
63 | ||
64 | for (i = ARRAY_SIZE(kern_modules_control) - 1; i >= 0; i--) { | |
65 | ret = snprintf(modprobe, sizeof(modprobe), | |
66 | "/sbin/modprobe -r -q %s", | |
67 | kern_modules_control[i].name); | |
68 | if (ret < 0) { | |
69 | PERROR("snprintf modprobe -r"); | |
70 | goto error; | |
71 | } | |
72 | modprobe[sizeof(modprobe) - 1] = '\0'; | |
73 | ret = system(modprobe); | |
74 | if (ret == -1) { | |
75 | ERR("Unable to launch modprobe -r for module %s", | |
76 | kern_modules_control[i].name); | |
77 | } else if (kern_modules_control[i].required | |
78 | && WEXITSTATUS(ret) != 0) { | |
79 | ERR("Unable to remove module %s", | |
80 | kern_modules_control[i].name); | |
81 | } else { | |
82 | DBG("Modprobe removal successful %s", | |
83 | kern_modules_control[i].name); | |
84 | } | |
85 | } | |
86 | ||
87 | error: | |
88 | return; | |
89 | } | |
90 | ||
91 | /* | |
92 | * Remove data kernel modules in reverse load order. | |
93 | */ | |
94 | void modprobe_remove_lttng_data(void) | |
95 | { | |
96 | int ret = 0, i; | |
97 | char modprobe[256]; | |
98 | ||
99 | for (i = ARRAY_SIZE(kern_modules_list) - 1; i >= 0; i--) { | |
100 | ret = snprintf(modprobe, sizeof(modprobe), | |
101 | "/sbin/modprobe -r -q %s", | |
102 | kern_modules_list[i].name); | |
103 | if (ret < 0) { | |
df0f840b | 104 | PERROR("snprintf modprobe -r"); |
096102bd DG |
105 | goto error; |
106 | } | |
107 | modprobe[sizeof(modprobe) - 1] = '\0'; | |
108 | ret = system(modprobe); | |
109 | if (ret == -1) { | |
110 | ERR("Unable to launch modprobe -r for module %s", | |
111 | kern_modules_list[i].name); | |
112 | } else if (kern_modules_list[i].required | |
113 | && WEXITSTATUS(ret) != 0) { | |
114 | ERR("Unable to remove module %s", | |
115 | kern_modules_list[i].name); | |
116 | } else { | |
117 | DBG("Modprobe removal successful %s", | |
118 | kern_modules_list[i].name); | |
119 | } | |
120 | } | |
121 | ||
122 | error: | |
123 | return; | |
124 | } | |
125 | ||
126 | /* | |
127 | * Remove all kernel modules in reverse order. | |
128 | */ | |
129 | void modprobe_remove_lttng_all(void) | |
130 | { | |
131 | modprobe_remove_lttng_data(); | |
132 | modprobe_remove_lttng_control(); | |
133 | } | |
134 | ||
135 | /* | |
136 | * Load control kernel module(s). | |
137 | */ | |
138 | int modprobe_lttng_control(void) | |
139 | { | |
140 | int ret = 0, i; | |
141 | char modprobe[256]; | |
142 | ||
143 | for (i = 0; i < ARRAY_SIZE(kern_modules_control); i++) { | |
144 | ret = snprintf(modprobe, sizeof(modprobe), | |
145 | "/sbin/modprobe %s%s", | |
146 | kern_modules_control[i].required ? "" : "-q ", | |
147 | kern_modules_control[i].name); | |
148 | if (ret < 0) { | |
149 | PERROR("snprintf modprobe"); | |
150 | goto error; | |
151 | } | |
152 | modprobe[sizeof(modprobe) - 1] = '\0'; | |
153 | ret = system(modprobe); | |
154 | if (ret == -1) { | |
155 | ERR("Unable to launch modprobe for module %s", | |
156 | kern_modules_control[i].name); | |
157 | } else if (kern_modules_control[i].required | |
158 | && WEXITSTATUS(ret) != 0) { | |
159 | ERR("Unable to load module %s", | |
160 | kern_modules_control[i].name); | |
161 | } else { | |
162 | DBG("Modprobe successfully %s", | |
163 | kern_modules_control[i].name); | |
164 | } | |
165 | } | |
166 | ||
167 | error: | |
168 | return ret; | |
169 | } | |
170 | ||
171 | /* | |
172 | * Load data kernel module(s). | |
173 | */ | |
174 | int modprobe_lttng_data(void) | |
175 | { | |
176 | int ret = 0, i; | |
177 | char modprobe[256]; | |
178 | ||
179 | for (i = 0; i < ARRAY_SIZE(kern_modules_list); i++) { | |
180 | ret = snprintf(modprobe, sizeof(modprobe), | |
181 | "/sbin/modprobe %s%s", | |
182 | kern_modules_list[i].required ? "" : "-q ", | |
183 | kern_modules_list[i].name); | |
184 | if (ret < 0) { | |
df0f840b | 185 | PERROR("snprintf modprobe"); |
096102bd DG |
186 | goto error; |
187 | } | |
188 | modprobe[sizeof(modprobe) - 1] = '\0'; | |
189 | ret = system(modprobe); | |
190 | if (ret == -1) { | |
191 | ERR("Unable to launch modprobe for module %s", | |
192 | kern_modules_list[i].name); | |
193 | } else if (kern_modules_list[i].required | |
194 | && WEXITSTATUS(ret) != 0) { | |
195 | ERR("Unable to load module %s", | |
196 | kern_modules_list[i].name); | |
197 | } else { | |
198 | DBG("Modprobe successfully %s", | |
199 | kern_modules_list[i].name); | |
200 | } | |
201 | } | |
202 | ||
203 | error: | |
204 | return ret; | |
205 | } | |
206 | ||
207 | /* | |
208 | * Load all lttng kernel modules. | |
209 | */ | |
210 | int modprobe_lttng_all(void) | |
211 | { | |
212 | int ret; | |
213 | ||
214 | ret = modprobe_lttng_control(); | |
215 | if (ret < 0) { | |
216 | goto error; | |
217 | } | |
218 | ||
219 | ret = modprobe_lttng_data(); | |
220 | if (ret < 0) { | |
221 | goto error; | |
222 | } | |
223 | ||
224 | error: | |
225 | return ret; | |
226 | } |