From owner-svn-src-stable@freebsd.org Fri Aug 17 16:04:21 2018 Return-Path: Delivered-To: svn-src-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id B2B411073A22; Fri, 17 Aug 2018 16:04:21 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 65F6585462; Fri, 17 Aug 2018 16:04:21 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4702E2A19; Fri, 17 Aug 2018 16:04:21 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w7HG4Lm9009800; Fri, 17 Aug 2018 16:04:21 GMT (envelope-from markj@FreeBSD.org) Received: (from markj@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w7HG4KKC009797; Fri, 17 Aug 2018 16:04:20 GMT (envelope-from markj@FreeBSD.org) Message-Id: <201808171604.w7HG4KKC009797@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: markj set sender to markj@FreeBSD.org using -f From: Mark Johnston Date: Fri, 17 Aug 2018 16:04:20 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r337975 - in stable/11/sys: kern sys X-SVN-Group: stable-11 X-SVN-Commit-Author: markj X-SVN-Commit-Paths: in stable/11/sys: kern sys X-SVN-Commit-Revision: 337975 X-SVN-Commit-Repository: base 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: 2.1.27 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: Fri, 17 Aug 2018 16:04:21 -0000 Author: markj Date: Fri Aug 17 16:04:20 2018 New Revision: 337975 URL: https://svnweb.freebsd.org/changeset/base/337975 Log: MFC r337328: Don't check rcv sockbuf limits when sending on a unix stream socket. PR: 181741, 212812 Modified: stable/11/sys/kern/uipc_sockbuf.c stable/11/sys/kern/uipc_usrreq.c stable/11/sys/sys/sockbuf.h Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/kern/uipc_sockbuf.c ============================================================================== --- stable/11/sys/kern/uipc_sockbuf.c Fri Aug 17 15:41:01 2018 (r337974) +++ stable/11/sys/kern/uipc_sockbuf.c Fri Aug 17 16:04:20 2018 (r337975) @@ -888,21 +888,14 @@ sbappendaddr(struct sockbuf *sb, const struct sockaddr return (retval); } -int +void sbappendcontrol_locked(struct sockbuf *sb, struct mbuf *m0, struct mbuf *control) { - struct mbuf *m, *n, *mlast; - int space; + struct mbuf *m, *mlast; - SOCKBUF_LOCK_ASSERT(sb); - - space = m_length(control, &n) + m_length(m0, NULL); - - if (space > sbspace(sb)) - return (0); m_clrprotoflags(m0); - n->m_next = m0; /* concatenate data to control */ + m_last(control)->m_next = m0; SBLASTRECORDCHK(sb); @@ -916,18 +909,15 @@ sbappendcontrol_locked(struct sockbuf *sb, struct mbuf SBLASTMBUFCHK(sb); SBLASTRECORDCHK(sb); - return (1); } -int +void sbappendcontrol(struct sockbuf *sb, struct mbuf *m0, struct mbuf *control) { - int retval; SOCKBUF_LOCK(sb); - retval = sbappendcontrol_locked(sb, m0, control); + sbappendcontrol_locked(sb, m0, control); SOCKBUF_UNLOCK(sb); - return (retval); } /* Modified: stable/11/sys/kern/uipc_usrreq.c ============================================================================== --- stable/11/sys/kern/uipc_usrreq.c Fri Aug 17 15:41:01 2018 (r337974) +++ stable/11/sys/kern/uipc_usrreq.c Fri Aug 17 16:04:20 2018 (r337975) @@ -981,16 +981,22 @@ uipc_send(struct socket *so, int flags, struct mbuf *m unp2->unp_flags &= ~UNP_WANTCRED; control = unp_addsockcred(td, control); } + /* - * Send to paired receive port, and then reduce send buffer - * hiwater marks to maintain backpressure. Wake up readers. + * Send to paired receive port and wake up readers. Don't + * check for space available in the receive buffer if we're + * attaching ancillary data; Unix domain sockets only check + * for space in the sending sockbuf, and that check is + * performed one level up the stack. At that level we cannot + * precisely account for the amount of buffer space used + * (e.g., because control messages are not yet internalized). */ switch (so->so_type) { case SOCK_STREAM: if (control != NULL) { - if (sbappendcontrol_locked(&so2->so_rcv, m, - control)) - control = NULL; + sbappendcontrol_locked(&so2->so_rcv, m, + control); + control = NULL; } else sbappend_locked(&so2->so_rcv, m, flags); break; @@ -999,14 +1005,8 @@ uipc_send(struct socket *so, int flags, struct mbuf *m const struct sockaddr *from; from = &sun_noname; - /* - * Don't check for space available in so2->so_rcv. - * Unix domain sockets only check for space in the - * sending sockbuf, and that check is performed one - * level up the stack. - */ if (sbappendaddr_nospacecheck_locked(&so2->so_rcv, - from, m, control)) + from, m, control)) control = NULL; break; } Modified: stable/11/sys/sys/sockbuf.h ============================================================================== --- stable/11/sys/sys/sockbuf.h Fri Aug 17 15:41:01 2018 (r337974) +++ stable/11/sys/sys/sockbuf.h Fri Aug 17 16:04:20 2018 (r337975) @@ -146,9 +146,9 @@ int sbappendaddr_locked(struct sockbuf *sb, const stru struct mbuf *m0, struct mbuf *control); int sbappendaddr_nospacecheck_locked(struct sockbuf *sb, const struct sockaddr *asa, struct mbuf *m0, struct mbuf *control); -int sbappendcontrol(struct sockbuf *sb, struct mbuf *m0, +void sbappendcontrol(struct sockbuf *sb, struct mbuf *m0, struct mbuf *control); -int sbappendcontrol_locked(struct sockbuf *sb, struct mbuf *m0, +void sbappendcontrol_locked(struct sockbuf *sb, struct mbuf *m0, struct mbuf *control); void sbappendrecord(struct sockbuf *sb, struct mbuf *m0); void sbappendrecord_locked(struct sockbuf *sb, struct mbuf *m0);