From owner-svn-src-all@freebsd.org Sat Nov 17 19:19:38 2018 Return-Path: Delivered-To: svn-src-all@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 438331102C2B; Sat, 17 Nov 2018 19:19:38 +0000 (UTC) (envelope-from kevans@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 DE0E87AA82; Sat, 17 Nov 2018 19:19:37 +0000 (UTC) (envelope-from kevans@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 BC1A0488; Sat, 17 Nov 2018 19:19:37 +0000 (UTC) (envelope-from kevans@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id wAHJJbS7026636; Sat, 17 Nov 2018 19:19:37 GMT (envelope-from kevans@FreeBSD.org) Received: (from kevans@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id wAHJJbXB026635; Sat, 17 Nov 2018 19:19:37 GMT (envelope-from kevans@FreeBSD.org) Message-Id: <201811171919.wAHJJbXB026635@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kevans set sender to kevans@FreeBSD.org using -f From: Kyle Evans Date: Sat, 17 Nov 2018 19:19:37 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r340508 - head/lib/libbe X-SVN-Group: head X-SVN-Commit-Author: kevans X-SVN-Commit-Paths: head/lib/libbe X-SVN-Commit-Revision: 340508 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: DE0E87AA82 X-Spamd-Result: default: False [0.06 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_SPAM_SHORT(0.06)[0.064,0] X-Rspamd-Server: mx1.freebsd.org 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: Sat, 17 Nov 2018 19:19:38 -0000 Author: kevans Date: Sat Nov 17 19:19:37 2018 New Revision: 340508 URL: https://svnweb.freebsd.org/changeset/base/340508 Log: libbe(3): Rewrite be_unmount to stop mucking with getmntinfo(2) Go through the ZFS layer instead; given a BE, we can derive the dataset, zfs_open it, then zfs_unmount. ZFS takes care of the dirty details and likely gets it more correct than we did for more interesting setups. MFC after: 3 days Modified: head/lib/libbe/be_access.c Modified: head/lib/libbe/be_access.c ============================================================================== --- head/lib/libbe/be_access.c Sat Nov 17 19:15:29 2018 (r340507) +++ head/lib/libbe/be_access.c Sat Nov 17 19:19:37 2018 (r340508) @@ -164,37 +164,18 @@ be_unmount(libbe_handle_t *lbh, char *bootenv, int fla { int err, mntflags; char be[BE_MAXPATHLEN]; - struct statfs *mntbuf; - int mntsize; - char *mntpath; + zfs_handle_t *root_hdl; if ((err = be_root_concat(lbh, bootenv, be)) != 0) return (set_error(lbh, err)); - if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) { - if (errno == EIO) - return (set_error(lbh, BE_ERR_IO)); - return (set_error(lbh, BE_ERR_NOMOUNT)); - } + if ((root_hdl = zfs_open(lbh->lzh, be, ZFS_TYPE_FILESYSTEM)) == NULL) + return (set_error(lbh, BE_ERR_ZFSOPEN)); - mntpath = NULL; - for (int i = 0; i < mntsize; ++i) { - /* 0x000000de is the type number of zfs */ - if (mntbuf[i].f_type != 0x000000de) - continue; + mntflags = (flags & BE_MNT_FORCE) ? MS_FORCE : 0; - if (strcmp(mntbuf[i].f_mntfromname, be) == 0) { - mntpath = mntbuf[i].f_mntonname; - break; - } - } - - if (mntpath == NULL) - return (set_error(lbh, BE_ERR_NOMOUNT)); - - mntflags = (flags & BE_MNT_FORCE) ? MNT_FORCE : 0; - - if ((err = unmount(mntpath, mntflags)) != 0) { + if (zfs_unmount(root_hdl, NULL, mntflags) != 0) { + zfs_close(root_hdl); switch (errno) { case ENAMETOOLONG: return (set_error(lbh, BE_ERR_PATHLEN)); @@ -210,6 +191,7 @@ be_unmount(libbe_handle_t *lbh, char *bootenv, int fla return (set_error(lbh, BE_ERR_UNKNOWN)); } } + zfs_close(root_hdl); - return (set_error(lbh, BE_ERR_SUCCESS)); + return (BE_ERR_SUCCESS); }