From owner-svn-src-all@freebsd.org Thu Sep 5 00:56:38 2019 Return-Path: Delivered-To: svn-src-all@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 C25DDD254B; Thu, 5 Sep 2019 00:56:38 +0000 (UTC) (envelope-from cem@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 46P2MB3kGLz43Yc; Thu, 5 Sep 2019 00:56:38 +0000 (UTC) (envelope-from cem@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 62F8B240CF; Thu, 5 Sep 2019 00:56:38 +0000 (UTC) (envelope-from cem@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x850uckM019616; Thu, 5 Sep 2019 00:56:38 GMT (envelope-from cem@FreeBSD.org) Received: (from cem@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x850uccn019615; Thu, 5 Sep 2019 00:56:38 GMT (envelope-from cem@FreeBSD.org) Message-Id: <201909050056.x850uccn019615@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: cem set sender to cem@FreeBSD.org using -f From: Conrad Meyer Date: Thu, 5 Sep 2019 00:56:38 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r351835 - head/sys/sys X-SVN-Group: head X-SVN-Commit-Author: cem X-SVN-Commit-Paths: head/sys/sys X-SVN-Commit-Revision: 351835 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2019 00:56:38 -0000 Author: cem Date: Thu Sep 5 00:56:37 2019 New Revision: 351835 URL: https://svnweb.freebsd.org/changeset/base/351835 Log: sys/mount.h: Comment on distinction between vfs_{c,}mount Hope to save someone else a little future effort in ugly duplicated code. No functional change. Modified: head/sys/sys/mount.h Modified: head/sys/sys/mount.h ============================================================================== --- head/sys/sys/mount.h Wed Sep 4 22:37:28 2019 (r351834) +++ head/sys/sys/mount.h Thu Sep 5 00:56:37 2019 (r351835) @@ -651,6 +651,18 @@ struct nameidata; struct sysctl_req; struct mntarg; +/* + * N.B., vfs_cmount is the ancient vfsop invoked by the old mount(2) syscall. + * The new way is vfs_mount. + * + * vfs_cmount implementations typically translate arguments from their + * respective old per-FS structures into the key-value list supported by + * nmount(2), then use kernel_mount(9) to mimic nmount(2) from kernelspace. + * + * Filesystems with mounters that use nmount(2) do not need to and should not + * implement vfs_cmount. Hopefully a future cleanup can remove vfs_cmount and + * mount(2) entirely. + */ typedef int vfs_cmount_t(struct mntarg *ma, void *data, uint64_t flags); typedef int vfs_unmount_t(struct mount *mp, int mntflags); typedef int vfs_root_t(struct mount *mp, int flags, struct vnode **vpp);