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Message-ID: <152185663566.10434.10842263720369617262.stgit@magnolia>
Date: Fri, 23 Mar 2018 18:57:15 -0700
From: "Darrick J. Wong" <darrick.wong@...cle.com>
To: tytso@....edu, darrick.wong@...cle.com
Cc: Andreas Dilger <adilger@...ger.ca>, linux-ext4@...r.kernel.org
Subject: [PATCH 3/4] e2scrub: create a script to scrub all ext* filesystems
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
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