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Date:   Fri, 9 Mar 2018 14:41:13 -0800
From:   "Darrick J. Wong" <darrick.wong@...cle.com>
To:     Lukas Czerner <lczerner@...hat.com>
Cc:     tytso@....edu, linux-ext4@...r.kernel.org
Subject: Re: [PATCH 3/4] e2scrub: create a script to scrub all ext*
 filesystems

On Fri, Mar 09, 2018 at 02:36:45PM +0100, Lukas Czerner wrote:
> On Thu, Mar 08, 2018 at 12:13:34PM -0800, Darrick J. Wong wrote:
> > From: Darrick J. Wong <darrick.wong@...cle.com>
> > 
> > Create an e2scrub_all command to find all ext* filesystems
> > and run an online scrub against them all.
> 
> Looks good, although the man page is again very light on details. I'd
> rather use the same man page as for e2scrub with added paragraph that
> this is doing it on all ext[234] fs on lvm that can find in the system
> (regardless whether it's mounted or not).

I prefer to make the e2scrub_all manpage more forcefully point readers
at an enhanced e2scrub manpage than duplicate the contents.  So I'll do
that.

--D

> Thanks!
> -Lukas
> 
> > 
> > Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>
> > ---
> >  scrub/Makefile.in      |    9 ++++++--
> >  scrub/e2scrub_all.8.in |   18 ++++++++++++++++
> >  scrub/e2scrub_all.in   |   54 ++++++++++++++++++++++++++++++++++++++++++++++++
> >  3 files changed, 79 insertions(+), 2 deletions(-)
> >  create mode 100644 scrub/e2scrub_all.8.in
> >  create mode 100644 scrub/e2scrub_all.in
> > 
> > 
> > diff --git a/scrub/Makefile.in b/scrub/Makefile.in
> > index a8bb06b..1744941 100644
> > --- a/scrub/Makefile.in
> > +++ b/scrub/Makefile.in
> > @@ -11,8 +11,8 @@ INSTALL = @INSTALL@
> >  
> >  @MCONFIG@
> >  
> > -PROGS=		e2scrub
> > -MANPAGES=	e2scrub.8
> > +PROGS=		e2scrub e2scrub_all
> > +MANPAGES=	e2scrub.8 e2scrub_all.8
> >  CONFFILES=	e2scrub.conf
> >  
> >  ifeq ($(HAVE_UDEV),yes)
> > @@ -29,6 +29,11 @@ e2scrub: $(DEP_SUBSTITUTE) e2scrub.in
> >  	$(Q) $(SUBSTITUTE_UPTIME) $(srcdir)/e2scrub.in $@
> >  	$(Q) chmod a+x $@
> >  
> > +e2scrub_all: e2scrub_all.in
> > +	$(E) "	SUBST $@"
> > +	$(Q) $(SUBSTITUTE_UPTIME) $(srcdir)/e2scrub_all.in $@
> > +	$(Q) chmod a+x $@
> > +
> >  %.8: %.8.in $(DEP_SUBSTITUTE)
> >  	$(E) "	SUBST $@"
> >  	$(Q) $(SUBSTITUTE_UPTIME) $< $@
> > diff --git a/scrub/e2scrub_all.8.in b/scrub/e2scrub_all.8.in
> > new file mode 100644
> > index 0000000..79c9a05
> > --- /dev/null
> > +++ b/scrub/e2scrub_all.8.in
> > @@ -0,0 +1,18 @@
> > +.TH E2SCRUB 8 "@E2FSPROGS_MONTH@ @E2FSPROGS_YEAR@" "E2fsprogs version @E2FSPROGS_VERSION@"
> > +.SH NAME
> > +e2scrub_all - Check all mounted ext[2-4] LVM file systems for errors.
> > +.SH SYNOPSYS
> > +.B
> > +e2scrub_all [OPTION]
> > +.SH DESCRIPTION
> > +Searches the system for all LVM volumes containing an ext2, ext3, or
> > +ext4 file system, and checks them all for errors.
> > +If the file system has no errors, it will be fstrim'd.
> > +.SH OPTIONS
> > +.TP
> > +\fB-V\fR
> > +Print version information and exit.
> > +.SH AUTHOR
> > +Darrick J. Wong <darrick.wong@...cle.com>
> > +.SH COPYRIGHT
> > +Copyright ©2018 Darrick J. Wong.  License is GPLv2+. <http://www.gnu.org/licenses/gpl-2.0.html>
> > diff --git a/scrub/e2scrub_all.in b/scrub/e2scrub_all.in
> > new file mode 100644
> > index 0000000..414a519
> > --- /dev/null
> > +++ b/scrub/e2scrub_all.in
> > @@ -0,0 +1,54 @@
> > +#!/bin/bash
> > +
> > +#  Copyright (C) 2018 Oracle.  All Rights Reserved.
> > +#
> > +#  Author: Darrick J. Wong <darrick.wong@...cle.com>
> > +#
> > +#  This program is free software; you can redistribute it and/or
> > +#  modify it under the terms of the GNU General Public License
> > +#  as published by the Free Software Foundation; either version 2
> > +#  of the License, or (at your option) any later version.
> > +#
> > +#  This program is distributed in the hope that it would be useful,
> > +#  but WITHOUT ANY WARRANTY; without even the implied warranty of
> > +#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> > +#  GNU General Public License for more details.
> > +#
> > +#  You should have received a copy of the GNU General Public License
> > +#  along with this program; if not, write the Free Software Foundation,
> > +#  Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA.
> > +
> > +# Check all ext[234] filesystems mounted on LVM
> > +types="ext2,ext3,ext4"
> > +
> > +print_help() {
> > +	echo "Usage: $0"
> > +}
> > +
> > +print_version() {
> > +	echo "e2scrub_all @E2FSPROGS_VERSION@ (@E2FSPROGS_DATE@)"
> > +}
> > +
> > +while getopts "V" opt; do
> > +	case "${opt}" in
> > +	"V") print_version; exit 0;;
> > +	*) print_help; exit 2;;
> > +	esac
> > +done
> > +shift "$((OPTIND - 1))"
> > +
> > +# Scrub any fs on lvm by creating a snapshot and fscking that.
> > +lvs -o vg_name,lv_name,lv_role --noheadings 2> /dev/null | while read vg lv role extra; do
> > +	# parsing error?
> > +	test -n "${extra}" && continue
> > +	# Skip snapshots
> > +	echo "${role}" | grep -q "snapshot" && continue
> > +
> > +	dev="/dev/${vg}/${lv}"
> > +	# Skip non-ext[234]
> > +	blkid -p -n "${types}" "${dev}" > /dev/null 2>&1 || continue
> > +
> > +	${DBG} "@root_sbindir@...scrub" "${dev}"
> > +done
> > +
> > +exit 0
> > 

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