From patchwork Tue Mar 10 01:49:08 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fam Zheng X-Patchwork-Id: 5973491 Return-Path: X-Original-To: patchwork-linux-fsdevel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 82DC49F380 for ; Tue, 10 Mar 2015 01:51:23 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A361620416 for ; Tue, 10 Mar 2015 01:51:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 97D0F20414 for ; Tue, 10 Mar 2015 01:51:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752093AbbCJBvL (ORCPT ); Mon, 9 Mar 2015 21:51:11 -0400 Received: from mx1.redhat.com ([209.132.183.28]:55861 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751824AbbCJBvH (ORCPT ); Mon, 9 Mar 2015 21:51:07 -0400 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id t2A1o4At005440 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 9 Mar 2015 21:50:05 -0400 Received: from ad.nay.redhat.com (dhcp-14-137.nay.redhat.com [10.66.14.137]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id t2A1nJN7004165; Mon, 9 Mar 2015 21:49:51 -0400 From: Fam Zheng To: linux-kernel@vger.kernel.org Cc: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , x86@kernel.org, Alexander Viro , Andrew Morton , Kees Cook , Andy Lutomirski , David Herrmann , Alexei Starovoitov , Miklos Szeredi , David Drysdale , Oleg Nesterov , "David S. Miller" , Vivek Goyal , Mike Frysinger , "Theodore Ts'o" , Heiko Carstens , Rasmus Villemoes , Rashika Kheria , Hugh Dickins , Mathieu Desnoyers , Fam Zheng , Peter Zijlstra , linux-fsdevel@vger.kernel.org, linux-api@vger.kernel.org, Josh Triplett , "Michael Kerrisk (man-pages)" , Paolo Bonzini , Omar Sandoval , Jonathan Corbet , shane.seymour@hp.com, dan.j.rosenberg@gmail.com Subject: [PATCH v4 2/9] epoll: Specify clockid explicitly Date: Tue, 10 Mar 2015 09:49:08 +0800 Message-Id: <1425952155-27603-3-git-send-email-famz@redhat.com> In-Reply-To: <1425952155-27603-1-git-send-email-famz@redhat.com> References: <1425952155-27603-1-git-send-email-famz@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Later we will add clockid in the interface, so let's start using explicit clockid internally. Now we specify CLOCK_MONOTONIC, which is the same as before. Signed-off-by: Fam Zheng --- fs/eventpoll.c | 29 +++++++++++++++++------------ 1 file changed, 17 insertions(+), 12 deletions(-) diff --git a/fs/eventpoll.c b/fs/eventpoll.c index 7dfabeb..957d1d0 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -1570,7 +1570,7 @@ static int ep_send_events(struct eventpoll *ep, * error code, in case of error. */ static int ep_poll(struct eventpoll *ep, struct epoll_event __user *events, - int maxevents, const ktime_t timeout) + int maxevents, int clockid, const ktime_t timeout) { int res = 0, eavail, timed_out = 0; unsigned long flags; @@ -1578,6 +1578,8 @@ static int ep_poll(struct eventpoll *ep, struct epoll_event __user *events, wait_queue_t wait; ktime_t expires, *to = NULL; + if (clockid != CLOCK_MONOTONIC && clockid != CLOCK_REALTIME) + return -EINVAL; if (!ktime_to_ns(timeout)) { /* * Avoid the unnecessary trip to the wait queue loop, if the @@ -1624,7 +1626,8 @@ fetch_events: } spin_unlock_irqrestore(&ep->lock, flags); - if (!schedule_hrtimeout_range(to, slack, HRTIMER_MODE_ABS)) + if (!schedule_hrtimeout_range_clock(to, slack, + HRTIMER_MODE_ABS, clockid)) timed_out = 1; spin_lock_irqsave(&ep->lock, flags); @@ -1945,7 +1948,8 @@ error_return: } static inline int epoll_wait_do(int epfd, struct epoll_event __user *events, - int maxevents, const ktime_t timeout) + int maxevents, int clockid, + const ktime_t timeout) { int error; struct fd f; @@ -1979,7 +1983,7 @@ static inline int epoll_wait_do(int epfd, struct epoll_event __user *events, ep = f.file->private_data; /* Time to fish for events ... */ - error = ep_poll(ep, events, maxevents, timeout); + error = ep_poll(ep, events, maxevents, clockid, timeout); error_fput: fdput(f); @@ -1994,12 +1998,13 @@ SYSCALL_DEFINE4(epoll_wait, int, epfd, struct epoll_event __user *, events, int, maxevents, int, timeout) { ktime_t kt = ms_to_ktime(timeout); - return epoll_wait_do(epfd, events, maxevents, kt); + return epoll_wait_do(epfd, events, maxevents, CLOCK_MONOTONIC, kt); } static inline int epoll_pwait_do(int epfd, struct epoll_event __user *events, - int maxevents, ktime_t timeout, - sigset_t *sigmask, size_t sigsetsize) + int maxevents, + int clockid, ktime_t timeout, + sigset_t *sigmask) { int error; sigset_t sigsaved; @@ -2013,7 +2018,7 @@ static inline int epoll_pwait_do(int epfd, struct epoll_event __user *events, set_current_blocked(sigmask); } - error = epoll_wait_do(epfd, events, maxevents, timeout); + error = epoll_wait_do(epfd, events, maxevents, clockid, timeout); /* * If we changed the signal mask, we need to restore the original one. @@ -2050,8 +2055,8 @@ SYSCALL_DEFINE6(epoll_pwait, int, epfd, struct epoll_event __user *, events, if (copy_from_user(&ksigmask, sigmask, sizeof(ksigmask))) return -EFAULT; } - return epoll_pwait_do(epfd, events, maxevents, kt, - sigmask ? &ksigmask : NULL, sigsetsize); + return epoll_pwait_do(epfd, events, maxevents, CLOCK_MONOTONIC, kt, + sigmask ? &ksigmask : NULL); } #ifdef CONFIG_COMPAT @@ -2073,8 +2078,8 @@ COMPAT_SYSCALL_DEFINE6(epoll_pwait, int, epfd, sigset_from_compat(&ksigmask, &csigmask); } - return epoll_pwait_do(epfd, events, maxevents, kt, - sigmask ? &ksigmask : NULL, sigsetsize); + return epoll_pwait_do(epfd, events, maxevents, CLOCK_MONOTONIC, kt, + sigmask ? &ksigmask : NULL); } #endif