Commit | Line | Data |
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4a089752 MD |
1 | /* |
2 | * tracepoint-probe-sample2.c | |
3 | * | |
4 | * 2nd sample tracepoint probes. | |
5 | */ | |
6 | ||
7 | #include <linux/module.h> | |
8 | #include <linux/fs.h> | |
9 | #include "tp-samples-trace.h" | |
10 | ||
11 | /* | |
12 | * Here the caller only guarantees locking for struct file and struct inode. | |
13 | * Locking must therefore be done in the probe to use the dentry. | |
14 | */ | |
15 | static void probe_subsys_event(struct inode *inode, struct file *file) | |
16 | { | |
17 | printk(KERN_INFO "Event is encountered with inode number %lu\n", | |
18 | inode->i_ino); | |
19 | } | |
20 | ||
21 | int __init tp_sample_trace_init(void) | |
22 | { | |
23 | int ret; | |
24 | ||
25 | ret = register_trace_subsys_event(probe_subsys_event); | |
26 | WARN_ON(ret); | |
27 | ||
28 | return 0; | |
29 | } | |
30 | ||
31 | module_init(tp_sample_trace_init); | |
32 | ||
33 | void __exit tp_sample_trace_exit(void) | |
34 | { | |
35 | unregister_trace_subsys_event(probe_subsys_event); | |
2504ea5e | 36 | tracepoint_synchronize_unregister(); |
4a089752 MD |
37 | } |
38 | ||
39 | module_exit(tp_sample_trace_exit); | |
40 | ||
41 | MODULE_LICENSE("GPL"); | |
42 | MODULE_AUTHOR("Mathieu Desnoyers"); | |
43 | MODULE_DESCRIPTION("Tracepoint Probes Samples"); |