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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
19 struct 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 */
58 static 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
64 #else /* CONFIG_SIGNALFD */
65
66 static inline void signalfd_notify(struct task_struct *tsk, int sig) { }
67
68 #endif /* CONFIG_SIGNALFD */
69
70 #endif /* __KERNEL__ */
71
72 #endif /* _LINUX_SIGNALFD_H */
73