1/*
2 *  include/linux/signalfd.h
3 *
4 *  Copyright (C) 2007  Davide Libenzi <davidel@xmailserver.org>
5 *
6 */
7
8#ifndef _LINUX_SIGNALFD_H
9#define _LINUX_SIGNALFD_H
10
11#include <linux/types.h>
12/* For O_CLOEXEC and O_NONBLOCK */
13#include <linux/fcntl.h>
14
15/* Flags for signalfd4.  */
16#define SFD_CLOEXEC O_CLOEXEC
17#define SFD_NONBLOCK O_NONBLOCK
18
19struct signalfd_siginfo {
20	__u32 ssi_signo;
21	__s32 ssi_errno;
22	__s32 ssi_code;
23	__u32 ssi_pid;
24	__u32 ssi_uid;
25	__s32 ssi_fd;
26	__u32 ssi_tid;
27	__u32 ssi_band;
28	__u32 ssi_overrun;
29	__u32 ssi_trapno;
30	__s32 ssi_status;
31	__s32 ssi_int;
32	__u64 ssi_ptr;
33	__u64 ssi_utime;
34	__u64 ssi_stime;
35	__u64 ssi_addr;
36	__u16 ssi_addr_lsb;
37
38	/*
39	 * Pad strcture to 128 bytes. Remember to update the
40	 * pad size when you add new members. We use a fixed
41	 * size structure to avoid compatibility problems with
42	 * future versions, and we leave extra space for additional
43	 * members. We use fixed size members because this strcture
44	 * comes out of a read(2) and we really don't want to have
45	 * a compat on read(2).
46	 */
47	__u8 __pad[46];
48};
49
50
51#ifdef __KERNEL__
52
53#ifdef CONFIG_SIGNALFD
54
55/*
56 * Deliver the signal to listening signalfd.
57 */
58static inline void signalfd_notify(struct task_struct *tsk, int sig)
59{
60	if (unlikely(waitqueue_active(&tsk->sighand->signalfd_wqh)))
61		wake_up(&tsk->sighand->signalfd_wqh);
62}
63
64extern void signalfd_cleanup(struct sighand_struct *sighand);
65
66#else /* CONFIG_SIGNALFD */
67
68static inline void signalfd_notify(struct task_struct *tsk, int sig) { }
69
70static inline void signalfd_cleanup(struct sighand_struct *sighand) { }
71
72#endif /* CONFIG_SIGNALFD */
73
74#endif /* __KERNEL__ */
75
76#endif /* _LINUX_SIGNALFD_H */
77