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Date: Wed, 14 Mar 2018 22:06:12 -0600
From: Andreas Dilger <adilger@...ger.ca>
To: "Darrick J. Wong" <darrick.wong@...cle.com>
Cc: tytso@....edu, lczerner@...hat.com, linux-ext4@...r.kernel.org
Subject: Re: [PATCH 3/4] e2scrub: create a script to scrub all ext*
filesystems
On Mar 14, 2018, at 12:17 AM, Darrick J. Wong <darrick.wong@...cle.com> 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.
>
> Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>
Reviewed-by: Andreas Dilger <adilger@...ger.ca>
> ---
> scrub/Makefile.in | 9 ++++-
> scrub/e2scrub.conf.in | 3 ++
> scrub/e2scrub_all.8.in | 36 ++++++++++++++++++++
> scrub/e2scrub_all.in | 85 ++++++++++++++++++++++++++++++++++++++++++++++++
> 4 files changed, 131 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.conf.in b/scrub/e2scrub.conf.in
> index d578cc7..69f997f 100644
> --- a/scrub/e2scrub.conf.in
> +++ b/scrub/e2scrub.conf.in
> @@ -8,3 +8,6 @@
>
> # Arguments passed into e2fsck.
> # e2fsck_opts="-vtt"
> +
> +# Set this to 1 to have e2scrub_all scrub all LVs, not just the mounted ones.
> +# scrub_all=0
> diff --git a/scrub/e2scrub_all.8.in b/scrub/e2scrub_all.8.in
> new file mode 100644
> index 0000000..ba3b873
> --- /dev/null
> +++ b/scrub/e2scrub_all.8.in
> @@ -0,0 +1,36 @@
> +.TH E2SCRUB 8 "@E2FSPROGS_MONTH@ @E2FSPROGS_YEAR@" "E2fsprogs version @E2FSPROGS_VERSION@"
> +.SH NAME
> +e2scrub_all - check all mounted ext[234] filesystems for errors.
> +.SH SYNOPSYS
> +.B
> +e2scrub_all [OPTION]
> +.SH DESCRIPTION
> +Searches the system for all LVM logical volumes containing an ext2, ext3, or
> +ext4 file system, and checks them for problems.
> +The checking is performed by invoking the
> +.B e2scrub
> +tool, which will look for corruptions.
> +Corrupt filesystems will be tagged as having errors so that fsck will be
> +invoked before the next mount.
> +If no errors are encountered,
> +.B fstrim
> +will be called on the filesystem if it is mounted.
> +See the
> +.B e2scrub
> +manual page for more information about how the checking is performed.
> +.SH OPTIONS
> +.TP
> +\fB-A\fR
> +Scrub all ext[234] filesystems even if they are not mounted.
> +.TP
> +\fB-r\fR
> +Remove e2scrub snapshots but do not check anything.
> +.TP
> +\fB-V\fR
> +Print version information and exit.
> +.SH SEE ALSO
> +.BR e2scrub "(8)"
> +.SH AUTHOR
> +Darrick J. Wong <darrick.wong@...cle.com>
> +.SH COPYRIGHT
> +Copyright ©2018 Oracle. 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..b9e5dea
> --- /dev/null
> +++ b/scrub/e2scrub_all.in
> @@ -0,0 +1,85 @@
> +#!/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.
> +
> +scrub_all=0
> +conffile="@root_sysconfdir@...scrub.conf"
> +
> +test -f "${conffile}" && . "${conffile}"
> +
> +scrub_args=""
> +
> +print_help() {
> + echo "Usage: $0 [OPTIONS]"
> + echo " -A: Scrub all ext[234] filesystems even if not mounted."
> + echo " -r: Remove e2scrub snapshots."
> + echo " -V: Print version information and exit."
> +}
> +
> +print_version() {
> + echo "e2scrub_all @E2FSPROGS_VERSION@ (@E2FSPROGS_DATE@)"
> +}
> +
> +while getopts "ArV" opt; do
> + case "${opt}" in
> + "A") scrub_all=1;;
> + "r") scrub_args="${scrub_args} -r";;
> + "V") print_version; exit 0;;
> + *) print_help; exit 2;;
> + esac
> +done
> +shift "$((OPTIND - 1))"
> +
> +# Find scrub targets, make sure we only do this once.
> +ls_scrub_targets() {
> + lsblk -o NAME,FSTYPE,MOUNTPOINT -p -P -n | while read vars; do
> + eval "${vars}"
> +
> + # Skip non-ext[234]
> + case "${FSTYPE}" in
> + ext[234]) ;;
> + *) continue;;
> + esac
> +
> + # Skip unmounted filesystems unless -A
> + if [ "${scrub_all}" -eq 0 ] && [ -z "${MOUNTPOINT}" ]; then
> + continue;
> + fi
> +
> + # Skip non-lvm devices and lvm snapshots
> + lvm_vars="$(lvs --nameprefixes -o vg_name,lv_name,lv_role --noheadings "${NAME}" 2> /dev/null)"
> + test $? -ne 0 && continue
> + eval "${lvm_vars}"
> + echo "${LVM2_LV_ROLE}" | grep -q "snapshot" && continue
> +
> + if [ -n "${MOUNTPOINT}" ]; then
> + echo "${MOUNTPOINT}"
> + else
> + echo "${NAME}"
> + fi
> + done | sort | uniq
> +}
> +
> +# Scrub any mounted fs on lvm by creating a snapshot and fscking that.
> +stdin="$(realpath /dev/stdin)"
> +ls_scrub_targets | while read tgt; do
> + ${DBG} "@root_sbindir@...scrub" ${scrub_args} "${tgt}" < "${stdin}"
> +done
> +
> +exit 0
>
Cheers, Andreas
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