projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| e5a26a40 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 7f5a08c7 | 2 | /* |
| e5a26a40 | 3 | * Copyright (c) 2022, Microsoft Corporation. |
| 7f5a08c7 BB |
4 | * |
| 5 | * Authors: | |
| 6 | * Beau Belgrave <beaub@linux.microsoft.com> | |
| 7 | */ | |
| 7f5a08c7 | 8 | |
| e5a26a40 BB |
9 | #ifndef _LINUX_USER_EVENTS_H |
| 10 | #define _LINUX_USER_EVENTS_H | |
| 7f5a08c7 | 11 | |
| 72357590 BB |
12 | #include <linux/list.h> |
| 13 | #include <linux/refcount.h> | |
| 14 | #include <linux/mm_types.h> | |
| 15 | #include <linux/workqueue.h> | |
| e5a26a40 | 16 | #include <uapi/linux/user_events.h> |
| 7f5a08c7 | 17 | |
| fd593511 BB |
18 | #ifdef CONFIG_USER_EVENTS |
| 19 | struct user_event_mm { | |
| dcbd1ac2 | 20 | struct list_head mms_link; |
| a4c40c13 BB |
21 | struct list_head enablers; |
| 22 | struct mm_struct *mm; | |
| ff9e1632 | 23 | /* Used for one-shot lists, protected by event_mutex */ |
| a4c40c13 BB |
24 | struct user_event_mm *next; |
| 25 | refcount_t refcnt; | |
| 26 | refcount_t tasks; | |
| 27 | struct rcu_work put_rwork; | |
| fd593511 | 28 | }; |
| fd593511 | 29 | |
| 72357590 BB |
30 | extern void user_event_mm_dup(struct task_struct *t, |
| 31 | struct user_event_mm *old_mm); | |
| 32 | ||
| 33 | extern void user_event_mm_remove(struct task_struct *t); | |
| 34 | ||
| 35 | static inline void user_events_fork(struct task_struct *t, | |
| 36 | unsigned long clone_flags) | |
| 37 | { | |
| 38 | struct user_event_mm *old_mm; | |
| 39 | ||
| 40 | if (!t || !current->user_event_mm) | |
| 41 | return; | |
| 42 | ||
| 43 | old_mm = current->user_event_mm; | |
| 44 | ||
| 45 | if (clone_flags & CLONE_VM) { | |
| 46 | t->user_event_mm = old_mm; | |
| 47 | refcount_inc(&old_mm->tasks); | |
| 48 | return; | |
| 49 | } | |
| 50 | ||
| 51 | user_event_mm_dup(t, old_mm); | |
| 52 | } | |
| 53 | ||
| 54 | static inline void user_events_execve(struct task_struct *t) | |
| 55 | { | |
| 56 | if (!t || !t->user_event_mm) | |
| 57 | return; | |
| 58 | ||
| 59 | user_event_mm_remove(t); | |
| 60 | } | |
| 61 | ||
| 62 | static inline void user_events_exit(struct task_struct *t) | |
| 63 | { | |
| 64 | if (!t || !t->user_event_mm) | |
| 65 | return; | |
| 66 | ||
| 67 | user_event_mm_remove(t); | |
| 68 | } | |
| 69 | #else | |
| fd593511 BB |
70 | static inline void user_events_fork(struct task_struct *t, |
| 71 | unsigned long clone_flags) | |
| 72 | { | |
| 73 | } | |
| 74 | ||
| 75 | static inline void user_events_execve(struct task_struct *t) | |
| 76 | { | |
| 77 | } | |
| 78 | ||
| 79 | static inline void user_events_exit(struct task_struct *t) | |
| 80 | { | |
| 81 | } | |
| 72357590 | 82 | #endif /* CONFIG_USER_EVENTS */ |
| fd593511 | 83 | |
| e5a26a40 | 84 | #endif /* _LINUX_USER_EVENTS_H */ |