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Davide Libenzifba2afa2007-05-10 22:23:13 -07001/*
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
Jaswinder Singh Rajputa788fd52009-01-30 22:14:02 +053011#include <linux/types.h>
Ulrich Drepper5fb5e042008-07-23 21:29:37 -070012/* For O_CLOEXEC and O_NONBLOCK */
Ulrich Drepper9deb27b2008-07-23 21:29:24 -070013#include <linux/fcntl.h>
14
15/* Flags for signalfd4. */
16#define SFD_CLOEXEC O_CLOEXEC
Ulrich Drepper5fb5e042008-07-23 21:29:37 -070017#define SFD_NONBLOCK O_NONBLOCK
Davide Libenzifba2afa2007-05-10 22:23:13 -070018
19struct signalfd_siginfo {
Davide Libenzi96358de2007-10-16 23:30:23 -070020 __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;
Hidetoshi Setob8aeec32010-10-07 15:31:31 +090036 __u16 ssi_addr_lsb;
Davide Libenzifba2afa2007-05-10 22:23:13 -070037
38 /*
39 * Pad strcture to 128 bytes. Remember to update the
Robert P. J. Day14e4a0f2008-02-03 15:12:15 +020040 * pad size when you add new members. We use a fixed
Davide Libenzifba2afa2007-05-10 22:23:13 -070041 * 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 */
Hidetoshi Setob8aeec32010-10-07 15:31:31 +090047 __u8 __pad[46];
Davide Libenzifba2afa2007-05-10 22:23:13 -070048};
49
50
51#ifdef __KERNEL__
52
53#ifdef CONFIG_SIGNALFD
54
55/*
Davide Libenzib8fceee2007-09-20 12:40:16 -070056 * Deliver the signal to listening signalfd.
Davide Libenzifba2afa2007-05-10 22:23:13 -070057 */
58static inline void signalfd_notify(struct task_struct *tsk, int sig)
59{
Davide Libenzib8fceee2007-09-20 12:40:16 -070060 if (unlikely(waitqueue_active(&tsk->sighand->signalfd_wqh)))
61 wake_up(&tsk->sighand->signalfd_wqh);
Davide Libenzifba2afa2007-05-10 22:23:13 -070062}
63
64#else /* CONFIG_SIGNALFD */
65
Davide Libenzib8fceee2007-09-20 12:40:16 -070066static inline void signalfd_notify(struct task_struct *tsk, int sig) { }
Davide Libenzifba2afa2007-05-10 22:23:13 -070067
68#endif /* CONFIG_SIGNALFD */
69
70#endif /* __KERNEL__ */
71
72#endif /* _LINUX_SIGNALFD_H */
73