From: Fam Zheng <famz@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, Alexander Viro <viro@zeniv.linux.org.uk>,
Andrew Morton <akpm@linux-foundation.org>,
Kees Cook <keescook@chromium.org>,
Andy Lutomirski <luto@amacapital.net>,
David Herrmann <dh.herrmann@gmail.com>,
Alexei Starovoitov <ast@plumgrid.com>,
Miklos Szeredi <mszeredi@suse.cz>,
David Drysdale <drysdale@google.com>,
Oleg Nesterov <oleg@redhat.com>,
"David S. Miller" <davem@davemloft.net>,
Vivek Goyal <vgoyal@redhat.com>,
Mike Frysinger <vapier@gentoo.org>,
"Theodore Ts'o" <tytso@mit.edu>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
Rashika Kheria <rashika.kheria@gmail.com>,
Hugh Dickins <hughd@google.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Fam Zheng <famz@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
linux-fsdevel@vger.kernel.org, linux-api@vger.kernel.org,
Josh Triplett <josh@joshtriplett.org>,
"Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Omar Sandoval <osandov@osandov.com>,
Jonathan Corbet <corbet@lwn.net>,
shane.seymour@hp.com, dan.j.rosenberg@gmail.com
Subject: [PATCH v4 8/9] epoll: Add compat version implementation of epoll_pwait1
Date: Tue, 10 Mar 2015 09:49:14 +0800 [thread overview]
Message-ID: <1425952155-27603-9-git-send-email-famz@redhat.com> (raw)
In-Reply-To: <1425952155-27603-1-git-send-email-famz@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
---
fs/eventpoll.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
include/linux/compat.h | 6 ++++++
2 files changed, 56 insertions(+)
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 06a59fc..b837ea4 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -2178,6 +2178,56 @@ COMPAT_SYSCALL_DEFINE6(epoll_pwait, int, epfd,
return epoll_pwait_do(epfd, events, maxevents, CLOCK_MONOTONIC, kt,
sigmask ? &ksigmask : NULL);
}
+
+struct compat_epoll_wait_params {
+ int size;
+ int clockid;
+ compat_uptr_t timeout;
+ compat_uptr_t sigmask;
+ compat_size_t sigsetsize;
+} EPOLL_PACKED;
+
+COMPAT_SYSCALL_DEFINE5(epoll_pwait1, int, epfd, int, flags,
+ struct epoll_event __user *, events,
+ int, maxevents,
+ struct compat_epoll_wait_params __user *, params)
+{
+ struct compat_epoll_wait_params p;
+
+ ktime_t kt = { 0 };
+ sigset_t sigmask;
+ compat_sigset_t compat_sigmask;
+ struct timespec timeout;
+
+ if (flags)
+ return -EINVAL;
+ if (!params)
+ return -EINVAL;
+ if (copy_from_user(&p, params, sizeof(p)))
+ return -EFAULT;
+ if (p.size != sizeof(p))
+ return -EINVAL;
+ if (p.sigmask) {
+ if (copy_from_user(&compat_sigmask, compat_ptr(p.sigmask),
+ sizeof(sigmask)))
+ return -EFAULT;
+ if (p.sigsetsize != sizeof(p.sigmask))
+ return -EINVAL;
+ sigset_from_compat(&sigmask, &compat_sigmask);
+ }
+ if (p.timeout) {
+ if (compat_get_timespec(&timeout, compat_ptr(p.timeout)))
+ return -EFAULT;
+ if (!timespec_valid(&timeout))
+ return -EINVAL;
+ kt = timespec_to_ktime(timeout);
+ } else {
+ kt = ns_to_ktime(-1);
+ }
+
+ return epoll_pwait_do(epfd, events, maxevents, p.clockid,
+ kt, p.sigmask ? &sigmask : NULL);
+}
#endif
static int __init eventpoll_init(void)
diff --git a/include/linux/compat.h b/include/linux/compat.h
index ab25814..649c5b2 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -452,6 +452,12 @@ asmlinkage long compat_sys_epoll_pwait(int epfd,
const compat_sigset_t __user *sigmask,
compat_size_t sigsetsize);
+struct compat_epoll_wait_params;
+asmlinkage long compat_sys_epoll_pwait1(int epfd, int flags,
+ struct epoll_event __user *events,
+ int maxevents,
+ struct compat_epoll_wait_params __user *params);
+
asmlinkage long compat_sys_utime(const char __user *filename,
struct compat_utimbuf __user *t);
asmlinkage long compat_sys_utimensat(unsigned int dfd,
--
1.9.3
next prev parent reply other threads:[~2015-03-10 1:52 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-10 1:49 [PATCH v4 0/9] epoll: Introduce new syscalls, epoll_ctl_batch and epoll_pwait1 Fam Zheng
2015-03-10 1:49 ` [PATCH v4 1/9] epoll: Extract epoll_wait_do and epoll_pwait_do Fam Zheng
2015-03-10 1:49 ` [PATCH v4 2/9] epoll: Specify clockid explicitly Fam Zheng
2015-03-10 1:49 ` [PATCH v4 3/9] epoll: Extract ep_ctl_do Fam Zheng
2015-03-10 1:49 ` [PATCH v4 4/9] epoll: Add implementation for epoll_ctl_batch Fam Zheng
2015-03-10 13:59 ` Dan Rosenberg
2015-03-11 2:23 ` Fam Zheng
2015-03-10 1:49 ` [PATCH v4 5/9] x86: Hook up epoll_ctl_batch syscall Fam Zheng
2015-03-10 1:49 ` [PATCH v4 6/9] epoll: Add implementation for epoll_pwait1 Fam Zheng
2015-03-10 1:49 ` [PATCH v4 7/9] x86: Hook up epoll_pwait1 syscall Fam Zheng
2015-03-10 1:49 ` Fam Zheng [this message]
2015-03-10 1:49 ` [PATCH v4 9/9] x86: Hook up 32 bit compat " Fam Zheng
2015-03-12 15:02 ` [PATCH v4 0/9] epoll: Introduce new syscalls, epoll_ctl_batch and epoll_pwait1 Jason Baron
2015-03-13 11:31 ` Fam Zheng
2015-03-13 14:46 ` Jason Baron
2015-03-13 14:56 ` Paolo Bonzini
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