Commit 6d18c922 authored by Davide Libenzi's avatar Davide Libenzi Committed by Linus Torvalds
Browse files

signal/timer/event: signalfd compat code 



This patch implements the necessary compat code for the signalfd system call.

Signed-off-by: default avatarDavide Libenzi <davidel@xmailserver.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 2121e24b

fs/compat.c

+26 −0
Original line number Diff line number Diff line
@@ -46,6 +46,7 @@ 
#include <linux/tsacct_kern.h>

#include <linux/security.h>

#include <linux/highmem.h>

#include <linux/signal.h>

#include <linux/poll.h>

#include <linux/mm.h>

#include <linux/eventpoll.h>
@@ -2199,3 +2200,28 @@ asmlinkage long compat_sys_epoll_pwait(int epfd, 
#endif /* TIF_RESTORE_SIGMASK */



#endif /* CONFIG_EPOLL */



#ifdef CONFIG_SIGNALFD



asmlinkage long compat_sys_signalfd(int ufd,

				    const compat_sigset_t __user *sigmask,

				    compat_size_t sigsetsize)

{

	compat_sigset_t ss32;

	sigset_t tmp;

	sigset_t __user *ksigmask;



	if (sigsetsize != sizeof(compat_sigset_t))

		return -EINVAL;

	if (copy_from_user(&ss32, sigmask, sizeof(ss32)))

		return -EFAULT;

	sigset_from_compat(&tmp, &ss32);

	ksigmask = compat_alloc_user_space(sizeof(sigset_t));

	if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t)))

		return -EFAULT;



	return sys_signalfd(ufd, ksigmask, sizeof(sigset_t));

}



#endif /* CONFIG_SIGNALFD */