From owner-svn-src-head@freebsd.org Tue Apr 14 15:27:25 2020 Return-Path: Delivered-To: svn-src-head@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 63A7F2C30F7; Tue, 14 Apr 2020 15:27:25 +0000 (UTC) (envelope-from jtl@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 491q9T20Slz4Lhy; Tue, 14 Apr 2020 15:27:25 +0000 (UTC) (envelope-from jtl@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 3FC8875CB; Tue, 14 Apr 2020 15:27:25 +0000 (UTC) (envelope-from jtl@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 03EFRPdI055695; Tue, 14 Apr 2020 15:27:25 GMT (envelope-from jtl@FreeBSD.org) Received: (from jtl@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 03EFRPMw055694; Tue, 14 Apr 2020 15:27:25 GMT (envelope-from jtl@FreeBSD.org) Message-Id: <202004141527.03EFRPMw055694@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: jtl set sender to jtl@FreeBSD.org using -f From: "Jonathan T. Looney" Date: Tue, 14 Apr 2020 15:27:25 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r359921 - head/sys/sys X-SVN-Group: head X-SVN-Commit-Author: jtl X-SVN-Commit-Paths: head/sys/sys X-SVN-Commit-Revision: 359921 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 14 Apr 2020 15:27:25 -0000 Author: jtl Date: Tue Apr 14 15:27:24 2020 New Revision: 359921 URL: https://svnweb.freebsd.org/changeset/base/359921 Log: Make the path length of UNIX domain sockets specified by a #define. Also, add a comment describing the historical context for this length. Reviewed by: bz, jhb, kbowling (previous version) MFC after: 2 weeks Sponsored by: Netflix, Inc. Differential Revision: https://reviews.freebsd.org/D24272 Modified: head/sys/sys/un.h Modified: head/sys/sys/un.h ============================================================================== --- head/sys/sys/un.h Tue Apr 14 14:48:00 2020 (r359920) +++ head/sys/sys/un.h Tue Apr 14 15:27:24 2020 (r359921) @@ -44,12 +44,20 @@ typedef __sa_family_t sa_family_t; #endif /* + * Historically, (struct sockaddr) needed to fit inside an mbuf. + * For this reason, UNIX domain sockets were therefore limited to + * 104 bytes. While this limit is no longer necessary, it is kept for + * binary compatibility reasons. + */ +#define SUNPATHLEN 104 + +/* * Definitions for UNIX IPC domain. */ struct sockaddr_un { unsigned char sun_len; /* sockaddr len including null */ sa_family_t sun_family; /* AF_UNIX */ - char sun_path[104]; /* path name (gag) */ + char sun_path[SUNPATHLEN]; /* path name (gag) */ }; #if __BSD_VISIBLE