linux-ext4 - [PATCH 3/4] e2scrub: create a script to scrub all ext* filesystems

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Message-ID: <152087129361.4129.2235207563424173822.stgit@magnolia>
Date:   Mon, 12 Mar 2018 09:14:53 -0700
From:   "Darrick J. Wong" <darrick.wong@...cle.com>
To:     tytso@....edu, darrick.wong@...cle.com
Cc:     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>
---
 scrub/Makefile.in      |    9 ++++++--
 scrub/e2scrub_all.8.in |   30 ++++++++++++++++++++++++++
 scrub/e2scrub_all.in   |   55 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 92 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..034ed9e
--- /dev/null
+++ b/scrub/e2scrub_all.8.in
@@ -0,0 +1,30 @@
+.TH E2SCRUB 8 "@E2FSPROGS_MONTH@ @E2FSPROGS_YEAR@" "E2fsprogs version @E2FSPROGS_VERSION@"
+.SH NAME
+e2scrub_all - Check all mounted ext[234] LVM file systems 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-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..453981b
--- /dev/null
+++ b/scrub/e2scrub_all.in
@@ -0,0 +1,55 @@
+#!/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: $0 [OPTIONS]"
+	echo " -V: Print version information and exit."
+}
+
+print_version() {
+	echo "e2scrub_all @E2FSPROGS_VERSION@ (@E2FSPROGS_DATE@)"
+}
+
+while getopts "V" opt; do
+	case "${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