PNP: PNP0f13
 (Š    #!/usr/bin/bash
# We use some bash-isms (getopts?)

# Copyright (C) 2007-2017 Red Hat, Inc. All rights reserved.
#
# This file is part of LVM2.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions
# of the GNU General Public License v.2.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

# lvm_dump: This script is used to collect pertinent information for
#           the debugging of lvm issues.

# following external commands are used throughout the script
# echo and test are internal in bash at least
MKDIR="mkdir" # need -p
TAR="tar" # need czf
RM="rm" # need -rf
CP="cp"
TAIL="tail" # we need -n
LS="ls" # need -la
PS="ps" # need alx
SED="sed"
DD="dd"
CUT="cut"
GREP="grep"
DATE="date"
BASENAME="basename"
UDEVADM="udevadm"
UNAME="uname"
TR="tr"
SOCAT="socat" # either socat or nc is needed for dumping lvmetad state
NC="nc"

if test "yes" = yes; then
    DDFLAGS='iflag=direct oflag=direct'
else
    DDFLAGS=
fi

# user may override lvm and dmsetup location by setting LVM_BINARY
# and DMSETUP_BINARY respectively
LVM=${LVM_BINARY-lvm}
DMSETUP=${DMSETUP_BINARY-dmsetup}
LVMETAD_SOCKET=${LVM_LVMETAD_SOCKET-/var/run/lvm/lvmetad.socket}
LVMPOLLD_SOCKET=${LVM_LVMPOLLD_SOCKET-/var/run/lvm/lvmpolld.socket}

die() {
    code=$1; shift
    echo "$@" 1>&2
    exit "$code"
}

"$LVM" version >& /dev/null || die 2 "Could not run lvm binary '$LVM'"
"$DMSETUP" version >& /dev/null || DMSETUP=:

function usage {
	echo "$0 [options]"
	echo "    -h print this message"
	echo "    -a advanced collection - warning: if lvm is already hung,"
	echo "       then this script may hang as well if -a is used"
	echo "    -c if running clvmd, gather cluster data as well"
	echo "    -d <directory> dump into a directory instead of tarball"
	echo "    -l gather lvmetad state if running"
	echo "    -p gather lvmpolld state if running"
	echo "    -m gather LVM metadata from the PVs"
	echo "    -s gather system info and context"
	echo "    -u gather udev info and context"
	echo ""

	exit 1
}

advanced=0
clustered=0
metadata=0
sysreport=0
udev=0
while getopts :acd:hlpmus opt; do
	case $opt in 
		a)	advanced=1 ;;
		c)	clustered=1 ;;
		d)	userdir=$OPTARG ;;
		h)	usage ;;
		l)	lvmetad=1 ;;
		p)	lvmpolld=1 ;;
		m)	metadata=1 ;;
		s)      sysreport=1 ;;
		u)	udev=1 ;;
		:)	echo "$0: $OPTARG requires a value:"; usage ;;
		\?)     echo "$0: unknown option $OPTARG"; usage ;;
		*)	usage ;;
	esac
done

NOW=$("$DATE" -u +%G%m%d%k%M%S | "$TR" -d ' ')
if test -n "$userdir"; then
	dir=$userdir
else
	dirbase="lvmdump-$HOSTNAME-$NOW"
	dir="$HOME/$dirbase"
fi

if test -d "$dir" ; then
	(shopt -s nullglob dotglob; test -r "$dir" -a -w "$dir" -a -x "$dir" && cd "$dir" && files=(*) && ((! ${#files[@]}))) || \
		die 5 "Fatal: directory $dir already exists and is not empty or inaccessible"
else
	test -e "$dir" && die 3 "Fatal: $dir already exists"
	"$MKDIR" -p "$dir" || die 4 "Fatal: could not create $dir"
fi

log="$dir/lvmdump.log"

myecho() {
	echo "$@"
	echo "$@" >> "$log"
}

log() {
	echo "$@" >> "$log"
	eval "$@"
}

warnings() {
	if test "$UID" != 0 && test "$EUID" != 0; then
		myecho "WARNING! Running as non-privileged user, dump is likely incomplete!"
	elif test "$DMSETUP" = ":"; then
		myecho "WARNING! Could not run dmsetup, dump is likely incomplete."
	fi
}

warnings

myecho "Creating dump directory: $dir"
echo " "

if (( advanced )); then
	myecho "Gathering LVM volume info..."

	myecho "  vgscan..."
	log "\"$LVM\" vgscan -vvvv >> \"$dir/vgscan\" 2>&1"

	myecho "  pvscan..."
	log "\"$LVM\" pvscan -v >> \"$dir/pvscan\" 2>> \"$log\""

	myecho "  lvs..."
	log "\"$LVM\" lvs -a -H -o +devices,kernel_major,kernel_minor >> \"$dir/lvs\" 2>> \"$log\""

	myecho "  pvs..."
	log "\"$LVM\" pvs -a -o +major,minor -v >> \"$dir/pvs\" 2>> \"$log\""

	myecho "  vgs..."
	log "\"$LVM\" vgs -v >> \"$dir/vgs\" 2>> \"$log\""
fi

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