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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 | 45 | { "lttng-types", 0 }, |
07e716ec | 46 | { "lttng-probe-asoc", 0 }, |
096102bd | 47 | { "lttng-probe-block", 0 }, |
bd69f856 AG |
48 | { "lttng-probe-btrfs", 0 }, |
49 | { "lttng-probe-compaction", 0 }, | |
07e716ec | 50 | { "lttng-probe-ext3", 0 }, |
bd69f856 | 51 | { "lttng-probe-ext4", 0 }, |
07e716ec | 52 | { "lttng-probe-gpio", 0 }, |
096102bd | 53 | { "lttng-probe-irq", 0 }, |
07e716ec WP |
54 | { "lttng-probe-jbd", 0 }, |
55 | { "lttng-probe-jbd2", 0 }, | |
56 | { "lttng-probe-kmem", 0 }, | |
096102bd | 57 | { "lttng-probe-kvm", 0 }, |
868e733e MG |
58 | { "lttng-probe-kvm-x86", 0 }, |
59 | { "lttng-probe-kvm-x86-mmu", 0 }, | |
07e716ec | 60 | { "lttng-probe-lock", 0 }, |
e3e57ea7 | 61 | { "lttng-probe-module", 0 }, |
07e716ec WP |
62 | { "lttng-probe-napi", 0 }, |
63 | { "lttng-probe-net", 0 }, | |
64 | { "lttng-probe-power", 0 }, | |
bd69f856 AG |
65 | { "lttng-probe-printk", 0 }, |
66 | { "lttng-probe-random", 0 }, | |
67 | { "lttng-probe-rcu", 0 }, | |
68 | { "lttng-probe-regmap", 0 }, | |
07e716ec | 69 | { "lttng-probe-regulator", 0 }, |
bd69f856 | 70 | { "lttng-probe-rpm", 0 }, |
096102bd | 71 | { "lttng-probe-sched", 0 }, |
07e716ec | 72 | { "lttng-probe-scsi", 0 }, |
9ae7d41d | 73 | { "lttng-probe-signal", 0 }, |
07e716ec WP |
74 | { "lttng-probe-skb", 0 }, |
75 | { "lttng-probe-sock", 0 }, | |
bd9b9e63 | 76 | { "lttng-probe-statedump", 0 }, |
bd69f856 | 77 | { "lttng-probe-sunrpc", 0 }, |
7ec24b77 | 78 | { "lttng-probe-timer", 0 }, |
07e716ec WP |
79 | { "lttng-probe-udp", 0 }, |
80 | { "lttng-probe-vmscan", 0 }, | |
7d6a25f0 | 81 | { "lttng-probe-v4l2", 0 }, |
bd69f856 AG |
82 | { "lttng-probe-workqueue", 0 }, |
83 | { "lttng-probe-writeback", 0 }, | |
096102bd DG |
84 | }; |
85 | ||
86 | /* | |
87 | * Remove control kernel module(s) in reverse load order. | |
88 | */ | |
89 | void modprobe_remove_lttng_control(void) | |
90 | { | |
91 | int ret = 0, i; | |
92 | char modprobe[256]; | |
93 | ||
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); | |
98 | if (ret < 0) { | |
99 | PERROR("snprintf modprobe -r"); | |
100 | goto error; | |
101 | } | |
102 | modprobe[sizeof(modprobe) - 1] = '\0'; | |
103 | ret = system(modprobe); | |
104 | if (ret == -1) { | |
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); | |
111 | } else { | |
112 | DBG("Modprobe removal successful %s", | |
113 | kern_modules_control[i].name); | |
114 | } | |
115 | } | |
116 | ||
117 | error: | |
118 | return; | |
119 | } | |
120 | ||
121 | /* | |
122 | * Remove data kernel modules in reverse load order. | |
123 | */ | |
124 | void modprobe_remove_lttng_data(void) | |
125 | { | |
126 | int ret = 0, i; | |
127 | char modprobe[256]; | |
128 | ||
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); | |
133 | if (ret < 0) { | |
df0f840b | 134 | PERROR("snprintf modprobe -r"); |
096102bd DG |
135 | goto error; |
136 | } | |
137 | modprobe[sizeof(modprobe) - 1] = '\0'; | |
138 | ret = system(modprobe); | |
139 | if (ret == -1) { | |
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); | |
146 | } else { | |
147 | DBG("Modprobe removal successful %s", | |
148 | kern_modules_list[i].name); | |
149 | } | |
150 | } | |
151 | ||
152 | error: | |
153 | return; | |
154 | } | |
155 | ||
156 | /* | |
157 | * Remove all kernel modules in reverse order. | |
158 | */ | |
159 | void modprobe_remove_lttng_all(void) | |
160 | { | |
161 | modprobe_remove_lttng_data(); | |
162 | modprobe_remove_lttng_control(); | |
163 | } | |
164 | ||
165 | /* | |
166 | * Load control kernel module(s). | |
167 | */ | |
168 | int modprobe_lttng_control(void) | |
169 | { | |
170 | int ret = 0, i; | |
171 | char modprobe[256]; | |
172 | ||
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); | |
178 | if (ret < 0) { | |
179 | PERROR("snprintf modprobe"); | |
180 | goto error; | |
181 | } | |
182 | modprobe[sizeof(modprobe) - 1] = '\0'; | |
183 | ret = system(modprobe); | |
184 | if (ret == -1) { | |
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); | |
191 | } else { | |
192 | DBG("Modprobe successfully %s", | |
193 | kern_modules_control[i].name); | |
194 | } | |
195 | } | |
196 | ||
197 | error: | |
198 | return ret; | |
199 | } | |
200 | ||
201 | /* | |
202 | * Load data kernel module(s). | |
203 | */ | |
204 | int modprobe_lttng_data(void) | |
205 | { | |
206 | int ret = 0, i; | |
207 | char modprobe[256]; | |
208 | ||
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); | |
214 | if (ret < 0) { | |
df0f840b | 215 | PERROR("snprintf modprobe"); |
096102bd DG |
216 | goto error; |
217 | } | |
218 | modprobe[sizeof(modprobe) - 1] = '\0'; | |
219 | ret = system(modprobe); | |
220 | if (ret == -1) { | |
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); | |
227 | } else { | |
228 | DBG("Modprobe successfully %s", | |
229 | kern_modules_list[i].name); | |
230 | } | |
231 | } | |
232 | ||
233 | error: | |
234 | return ret; | |
235 | } |