kernel/trace/trace_events_synth.c

Source file repositories/reference/linux-study-clean/kernel/trace/trace_events_synth.c

File Facts

System
Linux kernel
Corpus path
kernel/trace/trace_events_synth.c
Extension
.c
Size
59203 bytes
Lines
2430
Domain
Core OS
Bucket
Scheduler, Processes, Timers, Sync, And Syscalls
Inferred role
Core OS: operation-table or driver-model contract
Status
pattern implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

static const struct file_operations synth_events_fops = {
	.open           = synth_events_open,
	.write		= synth_events_write,
	.read           = seq_read,
	.llseek         = seq_lseek,
	.release        = seq_release,
};

/*
 * Register dynevent at core_initcall. This allows kernel to setup kprobe
 * events in postcore_initcall without tracefs.
 */
static __init int trace_events_synth_init_early(void)
{
	int err = 0;

	err = dyn_event_register(&synth_event_ops);
	if (err)
		pr_warn("Could not register synth_event_ops\n");

	return err;
}
core_initcall(trace_events_synth_init_early);

static __init int trace_events_synth_init(void)
{
	struct dentry *entry = NULL;
	int err = 0;
	err = tracing_init_dentry();
	if (err)
		goto err;

	entry = tracefs_create_file("synthetic_events", TRACE_MODE_WRITE,
				    NULL, NULL, &synth_events_fops);
	if (!entry) {
		err = -ENODEV;
		goto err;
	}

	return err;
 err:
	pr_warn("Could not create tracefs 'synthetic_events' entry\n");

	return err;
}

fs_initcall(trace_events_synth_init);

Annotation

Implementation Notes