/* * tracepoint-probe-sample2.c * * 2nd sample tracepoint probes. */ #include <linux/module.h> #include <linux/fs.h> #include "tp-samples-trace.h" /* * Here the caller only guarantees locking for struct file and struct inode. * Locking must therefore be done in the probe to use the dentry. */ static void probe_subsys_event(void *ignore, struct inode *inode, struct file *file) { printk(KERN_INFO "Event is encountered with inode number %lu\n", inode->i_ino); } static int __init tp_sample_trace_init(void) { int ret; ret = register_trace_subsys_event(probe_subsys_event, NULL); WARN_ON(ret); return 0; } module_init(tp_sample_trace_init); static void __exit tp_sample_trace_exit(void) { unregister_trace_subsys_event(probe_subsys_event, NULL); tracepoint_synchronize_unregister(); } module_exit(tp_sample_trace_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Mathieu Desnoyers"); MODULE_DESCRIPTION("Tracepoint Probes Samples");