From owner-svn-src-stable@FreeBSD.ORG Sun Jan 25 13:09:55 2015 Return-Path: Delivered-To: svn-src-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 05D7563D; Sun, 25 Jan 2015 13:09:55 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id DBC0B2D2; Sun, 25 Jan 2015 13:09:54 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.9/8.14.9) with ESMTP id t0PD9sWl059923; Sun, 25 Jan 2015 13:09:54 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by svn.freebsd.org (8.14.9/8.14.9/Submit) id t0PD9sV2059920; Sun, 25 Jan 2015 13:09:54 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201501251309.t0PD9sV2059920@svn.freebsd.org> X-Authentication-Warning: svn.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Sun, 25 Jan 2015 13:09:54 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r277697 - in stable/10/sys: fs/fifofs kern sys X-SVN-Group: stable-10 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 25 Jan 2015 13:09:55 -0000 Author: kib Date: Sun Jan 25 13:09:53 2015 New Revision: 277697 URL: https://svnweb.freebsd.org/changeset/base/277697 Log: MFC r277321: Make SIGSTOP working for sleeps done while waiting for fifo readers or writers in open(2), when the fifo is located on an NFS mount. Modified: stable/10/sys/fs/fifofs/fifo_vnops.c stable/10/sys/kern/kern_sig.c stable/10/sys/sys/signalvar.h Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/fs/fifofs/fifo_vnops.c ============================================================================== --- stable/10/sys/fs/fifofs/fifo_vnops.c Sun Jan 25 12:50:26 2015 (r277696) +++ stable/10/sys/fs/fifofs/fifo_vnops.c Sun Jan 25 13:09:53 2015 (r277697) @@ -137,7 +137,7 @@ fifo_open(ap) struct thread *td; struct fifoinfo *fip; struct pipe *fpipe; - int error; + int error, stops_deferred; vp = ap->a_vp; fp = ap->a_fp; @@ -188,8 +188,11 @@ fifo_open(ap) if ((ap->a_mode & O_NONBLOCK) == 0) { if ((ap->a_mode & FREAD) && fip->fi_writers == 0) { VOP_UNLOCK(vp, 0); + stops_deferred = sigallowstop(); error = msleep(&fip->fi_readers, PIPE_MTX(fpipe), PDROP | PCATCH | PSOCK, "fifoor", 0); + if (stops_deferred) + sigdeferstop(); vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); if (error) { fip->fi_readers--; @@ -212,8 +215,11 @@ fifo_open(ap) } if ((ap->a_mode & FWRITE) && fip->fi_readers == 0) { VOP_UNLOCK(vp, 0); + stops_deferred = sigallowstop(); error = msleep(&fip->fi_writers, PIPE_MTX(fpipe), PDROP | PCATCH | PSOCK, "fifoow", 0); + if (stops_deferred) + sigdeferstop(); vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); if (error) { fip->fi_writers--; Modified: stable/10/sys/kern/kern_sig.c ============================================================================== --- stable/10/sys/kern/kern_sig.c Sun Jan 25 12:50:26 2015 (r277696) +++ stable/10/sys/kern/kern_sig.c Sun Jan 25 13:09:53 2015 (r277697) @@ -2596,15 +2596,18 @@ sigdeferstop(void) * not immediately suspend if a stop was posted. Instead, the thread * will suspend either via ast() or a subsequent interruptible sleep. */ -void -sigallowstop() +int +sigallowstop(void) { struct thread *td; + int prev; td = curthread; thread_lock(td); + prev = (td->td_flags & TDF_SBDRY) != 0; td->td_flags &= ~TDF_SBDRY; thread_unlock(td); + return (prev); } /* Modified: stable/10/sys/sys/signalvar.h ============================================================================== --- stable/10/sys/sys/signalvar.h Sun Jan 25 12:50:26 2015 (r277696) +++ stable/10/sys/sys/signalvar.h Sun Jan 25 13:09:53 2015 (r277697) @@ -325,7 +325,7 @@ extern struct mtx sigio_lock; int cursig(struct thread *td); int sigdeferstop(void); -void sigallowstop(void); +int sigallowstop(void); void execsigs(struct proc *p); void gsignal(int pgid, int sig, ksiginfo_t *ksi); void killproc(struct proc *p, char *why);