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|
. /lib/partman/lib/base.sh
# Avoid warnings from lvm2 tools about open file descriptors
# Setting this here should avoid them for partman as a whole
export LVM_SUPPRESS_FD_WARNINGS=1
###############################################################################
#
# Miscellaneous utility functions
#
###############################################################################
# Convert common terms for disk sizes into something LVM understands.
# e.g. "200 gb" -> "47683"
lvm_extents_from_human() {
local vg size extent_size
vg="$1"
size="$2"
extent_size=$(vgs --noheadings --units K -o vg_extent_size "$vg")
echo $(($(human2longint "$size") / $(human2longint "$extent_size")))
}
# Convert LVM disk sizes into something human readable.
# e.g. "812.15M" -> "812MB"
lvm_size_to_human() {
echo "${1}B" | sed -e 's/\...//'
}
# Convenience wrapper for lvs/pvs/vgs
lvm_get_info() {
local type info device output
type=$1
info=$2
device=$3
output=$($type --noheadings --nosuffix --separator ":" --units M \
-o "$info" $device 2> /dev/null)
if [ $? -ne 0 ]; then
return 1
fi
# NOTE: The last sed, s/:$// is necessary due to a bug in lvs which adds a
# trailing separator even if there is only one field
output=$(echo "$output" | sed -e 's/^[:[:space:]]\+//g;s/[:[:space:]]\+$//g')
# Be careful here, we don't want to output only a newline
if [ -n "$output" ]; then
echo "$output"
fi
return 0
}
# Converts a list of space (or newline) separated values to comma separated values
ssv_to_csv() {
local csv value
csv=""
for value in $1; do
if [ -z "$csv" ]; then
csv="$value"
else
csv="$csv, $value"
fi
done
echo "$csv"
}
# Converts a list of comma separated values to space separated values
csv_to_ssv() {
echo "$1" | sed -e 's/ *, */ /g'
}
# Produces a human readable description of the current LVM config
lvm_get_config() {
local output pv pvs vg vgs lv lvs line
# Unallocated PVs
db_metaget partman-lvm/text/configuration_freepvs description
output="$RET
"
pvs=$(pv_list_free)
if [ -z "$pvs" ]; then
db_metaget partman-lvm/text/configuration_none_pvs description
output="$output * $RET
"
else
for pv in $(pv_list_free); do
pv_get_info "$pv"
line=$(printf "%-56s (%sMB)" " * $pv" "$SIZE")
output="${output}${line}
"
done
fi
# Volume groups
db_metaget partman-lvm/text/configuration_vgs description
output="$output
$RET
"
vgs=$(vg_list)
if [ -z "$vgs" ]; then
db_metaget partman-lvm/text/configuration_none_vgs description
RET="$output * $RET
"
return 0
fi
for vg in $vgs; do
# VG name
vg_get_info "$vg"
line=$(printf "%-56s (%sMB)" " * $vg" "$SIZE")
output="${output}${line}
"
# PVs used by VG
# This will return > 0 results, otherwise we'd have no VG
pvs=$(vg_list_pvs "$vg")
db_metaget partman-lvm/text/configuration_pv description
for pv in $pvs; do
pv_get_info "$pv"
line=$(printf "%-35s %-20s (%sMB)" " - $RET" "$pv" "$SIZE")
output="${output}${line}
"
done
# LVs provided by VG
lvs=$(vg_list_lvs "$vg")
if [ -z "$lvs" ]; then
continue
fi
db_metaget partman-lvm/text/configuration_lv description
for lv in $lvs; do
lv_get_info "$vg" "$lv"
line=$(printf "%-35s %-20s (%sMB)" " - $RET" "$lv" "$SIZE")
output="${output}${line}
"
done
done
RET="$output"
return 0
}
# Common checks for VG and LV names
# Rules:
# 1) At least one character
# 2) Only alphanumeric characters (isalnum()) and "._-+"
# 3) May not be "." or ".."
# 4) must not start with a hyphen
# 5) maximum name length 128 characters
# See lvm2 source and bug #254630 for details
lvm_name_ok() {
local name
name="$1"
# Rule 1
if [ -z "$name" ]; then
return 1
fi
# Rule 2
if [ "$(echo -n "$name" | sed 's/[^-+_\.[:alnum:]]//g')" != "$name" ]; then
return 1
fi
# Rule 3
if [ "$name" = "." -o "$name" = ".." ]; then
return 1
fi
# Rule 4
if [ "$(echo -n "$name" | sed 's/^-//')" != "$name" ]; then
return 1
fi
# Rule 5
if [ $(echo -n "$name" | wc -c) -gt 128 ]; then
return 1
fi
return 0
}
# Would a PV be allowed on this partition?
pv_allowed () {
local dev=$1
local id=$2
cd $dev
local lvm=no
if grep -q "/dev/md" $dev/device; then
# LVM on software RAID
lvm=yes
elif grep -q "/dev/mapper/" $dev/device; then
# LVM on device-mapper crypto
if type dmsetup >/dev/null 2>&1; then
device=$(cat $dev/device)
if [ "$(dmsetup status $device | cut -d' ' -f3)" = crypt ]; then
lvm=yes
fi
fi
fi
# sparc can not have LVM starting at 0 or it will destroy the partition table
if [ "$(udpkg --print-architecture)" = sparc ] && \
[ "${id%%-*}" = 0 ] && [ $lvm = no ]; then
return 1
fi
if [ $lvm = no ]; then
local fs
open_dialog PARTITION_INFO $id
read_line x1 x2 x3 x4 fs x6 x7
close_dialog
if [ "$fs" = free ]; then
# parted can't deal with VALID_FLAGS on free space
# as yet, so unfortunately we have to special-case
# label types.
local label
open_dialog GET_LABEL_TYPE
read_line label
close_dialog
case $label in
amiga|bsd|dasd|gpt|mac|msdos|sun)
# ... by creating a partition
lvm=yes
;;
esac
else
local flag
open_dialog VALID_FLAGS $id
while { read_line flag; [ "$flag" ]; }; do
if [ "$flag" = lvm ]; then
lvm=yes
fi
done
close_dialog
fi
fi
[ $lvm = yes ]
}
pv_list_allowed () {
partman_list_allowed pv_allowed
}
pv_list_allowed_free () {
local line
IFS="$NL"
for line in $(pv_list_allowed); do
restore_ifs
local dev="${line%%$TAB*}"
local rest="${line#*$TAB}"
local id="${rest%%$TAB*}"
if [ -e "$dev/locked" ] || [ -e "$dev/$id/locked" ]; then
continue
fi
local pv="${line##*$TAB}"
if [ ! -e "$pv" ]; then
echo "$line"
else
local vg=$(lvm_get_info pvs vg_name "$pv" || true)
if [ -z "$vg" ]; then
echo "$line"
fi
fi
IFS="$NL"
done
restore_ifs
}
###############################################################################
#
# Physical Volume utility functions
#
###############################################################################
# Check if a device contains PVs
# If called for a disk, this will also check all partitions;
# if called for anything other, it can return false positives!
pv_on_device() {
local device
device="$1"
if $(pvs --noheadings --nosuffix -o pv_name | grep -q "$device"); then
return 0
fi
return 1
}
# Get info on a PV
pv_get_info() {
local info
info=$(lvm_get_info pvs pv_size,pv_pe_count,pv_free,pv_pe_alloc_count,vg_name "$1")
if [ $? -ne 0 ]; then
return 1
fi
SIZE=$(echo "$info" | cut -d':' -f1 | cut -d'.' -f1)
SIZEPE=$(echo "$info" | cut -d':' -f2)
FREE=$(echo "$info" | cut -d':' -f3 | cut -d'.' -f1)
FREEPE=$(echo "$info" | cut -d':' -f4) # Used, not free, PEs
FREEPE=$(( $SIZEPE - $FREEPE )) # Calculate free PEs
VG=$(echo "$info" | cut -d':' -f5)
return 0
}
# Get VG for a PV
pv_get_vg() {
lvm_get_info pvs vg_name "$1"
}
# Get all PVs
pv_list() {
# Scan the partman devices and find partitions that have lvm as method.
# Do not rely on partition flags since it doesn't work for some partitions
# (e.g. dm-crypt, RAID)
local dev method
for dev in $DEVICES/*; do
[ -d "$dev" ] || continue
cd $dev
open_dialog PARTITIONS
while { read_line num id size type fs path name; [ "$id" ]; }; do
[ -f $id/method ] || continue
method=$(cat $id/method)
if [ "$method" = lvm ]; then
echo $(mapdevfs $path)
fi
done
close_dialog
done
}
# Get all unused PVs
pv_list_free() {
local pv vg
for pv in $(pv_list); do
vg=$(lvm_get_info pvs vg_name "$pv")
if [ -z "$vg" ]; then
echo "$pv"
fi
done
}
# Prepare a partition for use as a PV. If this returns true, then it did
# some work and a commit is necessary. Prints the new path.
pv_prepare() {
local dev="$1"
local id="$2"
local size parttype fs path
cd "$dev"
open_dialog PARTITION_INFO "$id"
read_line x1 id size freetype fs path x7
close_dialog
if [ "$fs" = free ]; then
local newtype
case $freetype in
primary)
newtype=primary
;;
logical)
newtype=logical
;;
pri/log)
local parttype
open_dialog PARTITIONS
while { read_line x1 x2 x3 parttype x5 x6 x7; [ "$parttype" ]; }; do
if [ "$parttype" = primary ]; then
has_primary=yes
fi
done
close_dialog
if [ "$has_primary" = yes ]; then
newtype=logical
else
newtype=primary
fi
;;
esac
open_dialog NEW_PARTITION $newtype ext2 $id full $size
read_line x1 id x3 x4 x5 path x7
close_dialog
fi
mkdir -p "$id"
local method="$(cat "$id/method" 2>/dev/null || true)"
if [ "$method" = swap ]; then
disable_swap "$dev" "$id"
fi
if [ "$method" != lvm ]; then
echo lvm >"$id/method"
rm -f "$id/use_filesystem"
rm -f "$id/format"
update_partition "$dev" "$id"
echo "$path"
return 0
fi
echo "$path"
return 1
}
# Initialize a PV
pv_create() {
local pv
pv="$1"
if pvs "$pv" > /dev/null 2>&1; then
return 0
fi
log-output -t partman-lvm pvcreate -ff -y "$pv"
return $?
}
# Remove the LVM signatures from a PV
pv_delete() {
local pv
pv="$1"
if ! pvs "$pv" > /dev/null 2>&1; then
return 0
fi
log-output -t partman-lvm pvremove -ff -y "$pv"
return $?
}
###############################################################################
#
# Logical Volume utility functions
#
###############################################################################
# Get LV info
lv_get_info() {
local info vg lv line tmplv
vg=$1
lv=$2
info=$(lvm_get_info lvs lv_name,lv_size "$vg")
SIZE=""
FS="unknown"
MOUNT="unknown"
for line in $(lvm_get_info lvs lv_name,lv_size "$vg"); do
tmplv=$(echo "$line" | cut -d':' -f1)
if [ $tmplv != $lv ]; then
continue
fi
SIZE=$(echo "$line" | cut -d':' -f2 | cut -d'.' -f1)
MOUNT=$(grep "^/dev/mapper/$vg-$lv" /proc/mounts | cut -d' ' -f2 | sed -e 's/\/target//')
# FIXME: Get FS - but we should not use parted for that!
#FS=$(parted "$tmplv" print | grep '^1' | \
# sed -e 's/ \+/ /g' | cut -d " " -f 4)
break
done
}
# List all LVs and their VGs
lv_list() {
lvm_get_info lvs lv_name,vg_name ""
}
# Create a LV
lv_create() {
local vg lv extents
vg="$1"
lv="$2"
extents="$3"
log-output -t partman-lvm lvcreate -l "$extents" -n "$lv" $vg
return $?
}
# Delete a LV
lv_delete() {
local vg lv device
vg="$1"
lv="$2"
device="/dev/$vg/$lv"
swapoff $device > /dev/null 2>&1
umount $device > /dev/null 2>&1
# swapoff or umount may have fiddled with metadata on the block
# device, so we may need to wait for udev to finish rescanning it.
update-dev --settle
log-output -t partman-lvm lvremove -f "$device"
return $?
}
# Checks that a logical volume name is ok
# Rules:
# 1) The common rules (see lvm_name_ok)
# 2) must not start with "snapshot"
# See lvm2 source and bug #254630 for details
lv_name_ok() {
local lvname
lvname="$1"
# Rule 1
lvm_name_ok "$lvname" || return 1
# Rule 2
if [ "${lvname#snapshot}" != "$lvname" ]; then
return 1
fi
return 0
}
###############################################################################
#
# Volume Group utility functions
#
###############################################################################
# Get VG info
vg_get_info() {
local info
info=$(lvm_get_info vgs vg_size,vg_extent_count,vg_free,vg_free_count,lv_count,pv_count "$1")
if [ $? -ne 0 ]; then
return 1
fi
SIZE=$(echo "$info" | cut -d':' -f1 | cut -d'.' -f1)
SIZEPE=$(echo "$info" | cut -d':' -f2)
FREE=$(echo "$info" | cut -d':' -f3 | cut -d'.' -f1)
FREEPE=$(echo "$info" | cut -d':' -f4)
LVS=$(echo "$info" | cut -d':' -f5)
PVS=$(echo "$info" | cut -d':' -f6)
return 0
}
# List all VGs
vg_list() {
lvm_get_info vgs vg_name ""
}
# List all VGs with free space
vg_list_free() {
local vg
for vg in $(vg_list); do
vg_get_info "$vg"
if [ $FREEPE -gt 0 ]; then
echo "$vg"
fi
done
}
# Get all PVs from a VG
vg_list_pvs() {
local line vg pv
# vgs doesn't work with pv_name
for line in $(lvm_get_info pvs vg_name,pv_name ""); do
vg=$(echo "$line" | cut -d':' -f1)
pv=$(echo "$line" | cut -d':' -f2)
if [ "$vg" = "$1" ]; then
echo "$pv"
fi
done
}
# Get all LVs from a VG
vg_list_lvs() {
lvm_get_info lvs lv_name "$1"
}
# Lock device(s) holding a PV
vg_lock_pvs() {
local name pv
name="$1"
shift
db_subst partman-lvm/text/in_use VG "$name"
db_metaget partman-lvm/text/in_use description
for pv in $*; do
partman_lock_unit "$pv" "$RET"
done
}
# Create a volume group
vg_create() {
local vg pv
vg="$1"
shift
for pv in $*; do
pv_create "$pv" || return 1
done
log-output -t partman-lvm vgcreate "$vg" $* || return 1
update-dev --settle
return 0
}
# Delete a volume group
vg_delete() {
local vg
vg="$1"
log-output -t partman-lvm vgchange -a n "$vg" && \
update-dev --settle && \
log-output -t partman-lvm vgremove "$vg" && \
update-dev --settle && \
return 0
# reactivate if deleting failed
log-output -t partman-lvm vgchange -a y "$vg"
update-dev --settle
return 1
}
# Extend a volume group (add a PV)
vg_extend() {
local vg pv
vg="$1"
pv="$2"
pv_create "$pv" || return 1
log-output -t partman-lvm vgextend "$vg" "$pv" || return 1
return 0
}
# Reduce a volume group (remove a PV)
vg_reduce() {
local vg pv
vg="$1"
pv="$2"
log-output -t partman-lvm vgreduce "$vg" "$pv"
return $?
}
# Checks that a logical volume name is ok
# Rules:
# 1) The common rules (see lvm_name_ok)
# See lvm2 source and bug #254630 for details
vg_name_ok() {
local vgname
vgname="$1"
# Rule 1
lvm_name_ok "$vgname" || return 1
return 0
}
|