include/linux/user_events.h

Source file repositories/reference/linux-study-clean/include/linux/user_events.h

File Facts

System
Linux kernel
Corpus path
include/linux/user_events.h
Extension
.h
Size
1699 bytes
Lines
85
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source 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

struct user_event_mm {
	struct list_head	mms_link;
	struct list_head	enablers;
	struct mm_struct	*mm;
	/* Used for one-shot lists, protected by event_mutex */
	struct user_event_mm	*next;
	refcount_t		refcnt;
	refcount_t		tasks;
	struct rcu_work		put_rwork;
};

extern void user_event_mm_dup(struct task_struct *t,
			      struct user_event_mm *old_mm);

extern void user_event_mm_remove(struct task_struct *t);

static inline void user_events_fork(struct task_struct *t,
				    u64 clone_flags)
{
	struct user_event_mm *old_mm;

	if (!t || !current->user_event_mm)
		return;

	old_mm = current->user_event_mm;

	if (clone_flags & CLONE_VM) {
		t->user_event_mm = old_mm;
		refcount_inc(&old_mm->tasks);
		return;
	}

	user_event_mm_dup(t, old_mm);
}

static inline void user_events_execve(struct task_struct *t)
{
	if (!t || !t->user_event_mm)
		return;

	user_event_mm_remove(t);
}

static inline void user_events_exit(struct task_struct *t)
{
	if (!t || !t->user_event_mm)
		return;

	user_event_mm_remove(t);
}
#else
static inline void user_events_fork(struct task_struct *t,
				    u64 clone_flags)
{
}

static inline void user_events_execve(struct task_struct *t)
{
}

static inline void user_events_exit(struct task_struct *t)
{
}
#endif /* CONFIG_USER_EVENTS */

#endif /* _LINUX_USER_EVENTS_H */

Annotation

Implementation Notes