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rear/s390-no-clobber-disks.patch

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Backport PR2943 to fix s390 dasd formatting Resolves: rhbz2172589
2023-02-22 21:08:38 +00:00
diff --git a/usr/share/rear/conf/default.conf b/usr/share/rear/conf/default.conf
index 23a83b71..0d13b487 100644
--- a/usr/share/rear/conf/default.conf
+++ b/usr/share/rear/conf/default.conf
@@ -416,6 +416,18 @@ test "$RECOVERY_UPDATE_URL" || RECOVERY_UPDATE_URL=""
# export MIGRATION_MODE='true'
# directly before he calls "rear recover":
test "$MIGRATION_MODE" || MIGRATION_MODE=''
+####
+
+####
+# Formatting DASDs (S/390 specific)
+# DASD (Direct Access Storage Device) denotes a disk drive on the S/390 architecture.
+# DASDs need to be formatted before use (even before creating a partition table on them).
+# By default ReaR will format the DASDs that are going to be used to recreate the system
+# (are referenced in disklayout.conf) before recreating the disk layout.
+# This can be suppressed by setting FORMAT_DASDS="false". It can be useful when one intends
+# to use already formatted DASDs as recovery target.
+FORMAT_DASDS=""
+####
##
# Resizing partitions in MIGRATION_MODE during "rear recover"
diff --git a/usr/share/rear/layout/prep-for-mount/Linux-s390/205_s390_enable_disk.sh b/usr/share/rear/layout/prep-for-mount/Linux-s390/205_s390_enable_disk.sh
new file mode 120000
index 00000000..5f7a2ac0
--- /dev/null
+++ b/usr/share/rear/layout/prep-for-mount/Linux-s390/205_s390_enable_disk.sh
@@ -0,0 +1 @@
+../../prepare/Linux-s390/205_s390_enable_disk.sh
\ No newline at end of file
diff --git a/usr/share/rear/layout/prepare/GNU/Linux/100_include_partition_code.sh b/usr/share/rear/layout/prepare/GNU/Linux/100_include_partition_code.sh
index 13c69ce8..2a2bc33f 100644
--- a/usr/share/rear/layout/prepare/GNU/Linux/100_include_partition_code.sh
+++ b/usr/share/rear/layout/prepare/GNU/Linux/100_include_partition_code.sh
@@ -24,6 +24,7 @@ fi
### Prepare a disk for partitioning/general usage.
create_disk() {
local component disk size label junk
+ local blocksize layout dasdtype dasdcyls junk2
read component disk size label junk < <(grep "^disk $1 " "$LAYOUT_FILE")
### Disks should be block devices.
@@ -67,7 +68,8 @@ sync
EOF
- create_partitions "$disk" "$label"
+ # $junk can contain useful DASD-specific fields
+ create_partitions "$disk" "$label" "$junk"
cat >> "$LAYOUT_CODE" <<EOF
# Make sure device nodes are visible (eg. in RHEL4)
@@ -93,6 +95,11 @@ create_partitions() {
### List partition types/names to detect disk label type.
local -a names=()
local part disk size pstart name junk
+ local orig_block_size layout dasdtype dasdcyls junk2
+ if [ "$label" == dasd ]; then
+ # dasd has more fields - junk is not junk anymore
+ read orig_block_size layout dasdtype dasdcyls junk2 <<<$3
+ fi
while read part disk size pstart name junk ; do
names+=( $name )
case $name in
@@ -227,10 +234,12 @@ EOF
if [[ "$end" ]] ; then
end=$( mathlib_calculate "$end - 1" )
fi
- if [[ "$ARCH" == "Linux-s390" ]] ; then
- # if dasd disk is LDL formated, then do not partition it, because it is partitioned and can take only partition
- if [[ ! "${listDasdLdl[@]}" =~ "$device" ]] ; then
- echo "not LDL dasd formated disk, create a partition"
+ if [[ "$ARCH" == "Linux-s390" && "$label" == dasd ]] ; then
+ # LDL formatted disks are already partitioned and should not be partitioned with parted or fdasd , it will fail
+ if [ "$layout" == LDL ]; then
+ Debug "$device: LDL formatted DASD, do not create a partition"
+ else
+ Debug "$device: ${layout} formatted DASD, create a partition"
cat >> "$LAYOUT_CODE" <<EOF
create_disk_partition "$device" "$name" $number $start $end
EOF
diff --git a/usr/share/rear/layout/prepare/Linux-s390/090_include_dasd_code.sh b/usr/share/rear/layout/prepare/Linux-s390/090_include_dasd_code.sh
new file mode 100644
index 00000000..fc5be463
--- /dev/null
+++ b/usr/share/rear/layout/prepare/Linux-s390/090_include_dasd_code.sh
@@ -0,0 +1,17 @@
+# Generate code for low-level formatting of a DASD
+
+dasd_format_code() {
+ local device size blocksize layout dasdtype dasdcyls
+
+ device="$1"
+ size="$2"
+ blocksize="$3"
+ layout="$4"
+ dasdtype="$5"
+ dasdcyls="$6"
+
+ has_binary dasdfmt || Error "Cannot find 'dasdfmt' command"
+
+ LogPrint 'dasdfmt:' $device ', blocksize:' $blocksize ', layout:' $layout
+ echo "dasdfmt -b $blocksize -d $layout -y $device"
+}
diff --git a/usr/share/rear/layout/prepare/Linux-s390/205_s390_enable_disk.sh b/usr/share/rear/layout/prepare/Linux-s390/205_s390_enable_disk.sh
index c4037e02..0f6946a9 100644
--- a/usr/share/rear/layout/prepare/Linux-s390/205_s390_enable_disk.sh
+++ b/usr/share/rear/layout/prepare/Linux-s390/205_s390_enable_disk.sh
@@ -2,45 +2,36 @@
# Before we can compare or map DASD devices we must enable them.
# This operation is only needed during "rear recover".
-format_s390_disk() {
- LogPrint "run dasdfmt"
- while read line ; do
- LogPrint 'dasdfmt:' "$line"
- # example format command: dasdfmt -b 4096 -d cdl -y /dev/dasda
- # where
- # b is the block size
- # d is the layout:
- # cdl - compatible disk layout (can be shared with zos and zvm apps)
- # ldl - linux disk layout
- # y - answer yes
- device=$( echo $line | awk '{ print $7 }' )
- blocksize=$( echo $line | awk '{ print $3 }' )
- layout=$( echo $line | awk '{ print tolower($5) }' )
- if [[ "$layout" == "ldl" ]] ; then
- # listDasdLdl contains devices such as /dev/dasdb that are formatted as LDL
- # LDL formatted disks are already partitioned and should not be partitioned with parted or fdasd , it will fail
- # this var, listDasdLdl, is used by 100_include_partition_code.sh to exclude writing partition code to diskrestore.sh for LDL disks
- listDasdLdl+=( $device )
- LogPrint "LDL disk added to listDasdLdl:" ${listDasdLdl[@]}
- fi
- LogPrint 'dasdfmt:' $device ', blocksize:' $blocksize ', layout:' $layout
- # dasd format
- dasdfmt -b $blocksize -d $layout -y $device
- done < <( grep "^dasdfmt " "$LAYOUT_FILE" )
-}
-
+DISK_MAPPING_HINTS=()
enable_s390_disk() {
+ local keyword device bus len newname
+
LogPrint "run chccwdev"
- while read line ; do
- LogPrint 'dasd channel:' "$line"
- device=$( echo $line | awk '{ print $4 }' )
- bus=$( echo $line | awk '{ print $2 }' )
- channel=$( echo $line | awk '{ print $5 }' )
- LogPrint 'chccwdev:' $device ', bus:' $bus ', channel:' $channel
- # dasd channel enable
- chccwdev -e $bus
- done < <( grep "^dasd_channel " "$LAYOUT_FILE" )
+ while read len device bus ; do
+ # this while loop must be outside the pipeline so that variables propagate outside
+ # (pipelines run in subshells)
+ LogPrint "Enabling DASD $device with virtual device number $bus"
+ if chccwdev -e $bus ; then
+ newname=$(lsdasd $bus | awk "/$bus/ { print \$3}" )
+ if ! test $newname ; then
+ LogPrintError "New device with virtual device number $bus not found among online DASDs"
+ continue
+ fi
+ if [ "$newname" != "$device" ]; then
+ LogPrint "original DASD '$device' changed name to '$newname'"
+ test "$MIGRATION_MODE" || MIGRATION_MODE='true'
+ fi
+ DISK_MAPPING_HINTS+=( "/dev/$device /dev/$newname" )
+ else
+ LogPrintError "Failed to enable $bus"
+ fi
+ done < <( grep "^dasd_channel " "$LAYOUT_FILE" | while read keyword bus device; do
+ # add device name length, so that "dasdb" sorts properly before "dasdaa"
+ # we need to create devices in the same order as the kernel orders them (by minor number)
+ # - this increases the chance that they will get identical names
+ echo ${#device} $device $bus
+ done | sort -k1n -k2 )
}
# May need to look at $OS_VENDOR also as DASD disk layout is distro specific:
@@ -49,7 +40,6 @@ case $OS_MASTER_VENDOR in
# "Fedora" also handles Red Hat
# "Debian" also handles Ubuntu
enable_s390_disk
- format_s390_disk
;;
(*)
LogPrintError "No code for DASD disk device enablement on $OS_MASTER_VENDOR"
diff --git a/usr/share/rear/layout/prepare/Linux-s390/360_generate_dasd_format_code.sh b/usr/share/rear/layout/prepare/Linux-s390/360_generate_dasd_format_code.sh
new file mode 100644
index 00000000..14bb942d
--- /dev/null
+++ b/usr/share/rear/layout/prepare/Linux-s390/360_generate_dasd_format_code.sh
@@ -0,0 +1,51 @@
+# DASD_FORMAT_CODE is the script to recreate the dasd formatting (dasdformat.sh).
+
+local component disk size label junk
+local blocksize layout dasdtype dasdcyls junk2
+
+
+save_original_file "$DASD_FORMAT_CODE"
+
+# Initialize
+
+echo '#!/bin/bash' >"$DASD_FORMAT_CODE"
+
+# Show the current output of lsdasd, it can be useful for identifying disks
+# (in particular it shows the Linux device name <-> virtual device number mapping,
+# formatted / unformatted status and the number/size of blocks when formatted )
+echo "# Current output of 'lsdasd':" >>"$DASD_FORMAT_CODE"
+lsdasd | sed -e 's/^/# /' >>"$DASD_FORMAT_CODE"
+
+cat <<EOF >>"$DASD_FORMAT_CODE"
+
+LogPrint "Start DASD format restoration."
+
+set -e
+set -x
+
+EOF
+
+while read component disk size label junk; do
+ if [ "$label" == dasd ]; then
+ # Ignore excluded components.
+ # Normally they are removed in 520_exclude_components.sh,
+ # but we run before it, so we must skip them here as well.
+ if IsInArray "$disk" "${EXCLUDE_RECREATE[@]}" ; then
+ Log "Excluding $disk from DASD reformatting."
+ continue
+ fi
+ # dasd has more fields - junk is not junk anymore
+ read blocksize layout dasdtype dasdcyls junk2 <<<$junk
+ dasd_format_code "$disk" "$size" "$blocksize" "$layout" "$dasdtype" "$dasdcyls" >> "$DASD_FORMAT_CODE" || \
+ LogPrintError "Error producing DASD format code for $disk"
+ fi
+done < <(grep "^disk " "$LAYOUT_FILE")
+
+cat <<EOF >>"$DASD_FORMAT_CODE"
+
+set +x
+set +e
+
+LogPrint "DASD(s) formatted."
+
+EOF
diff --git a/usr/share/rear/layout/prepare/Linux-s390/370_confirm_dasd_format_code.sh b/usr/share/rear/layout/prepare/Linux-s390/370_confirm_dasd_format_code.sh
new file mode 100644
index 00000000..5ba4edd5
--- /dev/null
+++ b/usr/share/rear/layout/prepare/Linux-s390/370_confirm_dasd_format_code.sh
@@ -0,0 +1,69 @@
+# adapted from 100_confirm_layout_code.sh
+#
+# Let the user confirm the
+# DASD format code (dasdformat.sh) script.
+#
+
+is_false "$FORMAT_DASDS" && return 0
+
+# Show the user confirmation dialog in any case but when not in migration mode
+# automatically proceed with less timeout USER_INPUT_INTERRUPT_TIMEOUT (by default 10 seconds)
+# to avoid longer delays (USER_INPUT_TIMEOUT is by default 300 seconds) in case of unattended recovery:
+# (taken from 120_confirm_wipedisk_disks.sh)
+local timeout="$USER_INPUT_TIMEOUT"
+is_true "$MIGRATION_MODE" || timeout="$USER_INPUT_INTERRUPT_TIMEOUT"
+
+rear_workflow="rear $WORKFLOW"
+original_disk_space_usage_file="$VAR_DIR/layout/config/df.txt"
+rear_shell_history="$( echo -e "cd $VAR_DIR/layout/\nvi $DASD_FORMAT_CODE\nless $DASD_FORMAT_CODE" )"
+unset choices
+choices[0]="Confirm DASD format script and continue '$rear_workflow'"
+choices[1]="Edit DASD format script ($DASD_FORMAT_CODE)"
+choices[2]="View DASD format script ($DASD_FORMAT_CODE)"
+choices[3]="View original disk space usage ($original_disk_space_usage_file)"
+choices[4]="Confirm what is currently on the DASDs, skip formatting them and continue '$rear_workflow'"
+choices[5]="Use Relax-and-Recover shell and return back to here"
+choices[6]="Abort '$rear_workflow'"
+prompt="Confirm or edit the DASD format script"
+choice=""
+wilful_input=""
+# When USER_INPUT_DASD_FORMAT_CODE_CONFIRMATION has any 'true' value be liberal in what you accept and
+# assume choices[0] 'Confirm DASD format' was actually meant:
+is_true "$USER_INPUT_DASD_FORMAT_CODE_CONFIRMATION" && USER_INPUT_DASD_FORMAT_CODE_CONFIRMATION="${choices[0]}"
+while true ; do
+ choice="$( UserInput -I DASD_FORMAT_CODE_CONFIRMATION -t "$timeout" -p "$prompt" -D "${choices[0]}" "${choices[@]}" )" && wilful_input="yes" || wilful_input="no"
+ case "$choice" in
+ (${choices[0]})
+ # Confirm DASD format file and continue:
+ is_true "$wilful_input" && LogPrint "User confirmed DASD format script" || LogPrint "Continuing '$rear_workflow' by default"
+ break
+ ;;
+ (${choices[1]})
+ # Run 'vi' with the original STDIN STDOUT and STDERR when 'rear' was launched by the user:
+ vi $DASD_FORMAT_CODE 0<&6 1>&7 2>&8
+ ;;
+ (${choices[2]})
+ # Run 'less' with the original STDIN STDOUT and STDERR when 'rear' was launched by the user:
+ less $DASD_FORMAT_CODE 0<&6 1>&7 2>&8
+ ;;
+ (${choices[3]})
+ # Run 'less' with the original STDIN STDOUT and STDERR when 'rear' was launched by the user:
+ less $original_disk_space_usage_file 0<&6 1>&7 2>&8
+ ;;
+ (${choices[4]})
+ # Confirm what is on the disks and continue without formatting
+ FORMAT_DASDS="false"
+ ;;
+ (${choices[5]})
+ # rear_shell runs 'bash' with the original STDIN STDOUT and STDERR when 'rear' was launched by the user:
+ rear_shell "" "$rear_shell_history"
+ ;;
+ (${choices[6]})
+ abort_dasd_format
+ Error "User chose to abort '$rear_workflow' in ${BASH_SOURCE[0]}"
+ ;;
+ esac
+done
+
+chmod +x $DASD_FORMAT_CODE
+
diff --git a/usr/share/rear/layout/prepare/Linux-s390/400_run_dasd_format_code.sh b/usr/share/rear/layout/prepare/Linux-s390/400_run_dasd_format_code.sh
new file mode 100644
index 00000000..16451af6
--- /dev/null
+++ b/usr/share/rear/layout/prepare/Linux-s390/400_run_dasd_format_code.sh
@@ -0,0 +1,185 @@
+# adapted from 200_run_layout_code.sh
+#
+# Run the DASD format code (dasdformat.sh)
+# again and again until it succeeds or the user aborts.
+#
+
+# Skip DASD formatting when the user has explicitly specified to not format them
+# or when the user selected "Confirm what is currently on the DASDs, skip formatting them"
+# in 370_confirm_dasd_format_code.sh
+
+is_false "$FORMAT_DASDS" && return 0
+
+function lsdasd_output () {
+ lsdasd 1>> >( tee -a "$RUNTIME_LOGFILE" 1>&7 )
+}
+
+rear_workflow="rear $WORKFLOW"
+original_disk_space_usage_file="$VAR_DIR/layout/config/df.txt"
+rear_shell_history="$( echo -e "cd $VAR_DIR/layout/\nvi $DASD_FORMAT_CODE\nless $RUNTIME_LOGFILE" )"
+wilful_input=""
+
+unset choices
+choices[0]="Rerun DASD format script ($DASD_FORMAT_CODE)"
+choices[1]="View '$rear_workflow' log file ($RUNTIME_LOGFILE)"
+choices[2]="Edit DASD format script ($DASD_FORMAT_CODE)"
+choices[3]="Show what is currently on the disks ('lsdasd' device list)"
+choices[4]="View original disk space usage ($original_disk_space_usage_file)"
+choices[5]="Use Relax-and-Recover shell and return back to here"
+choices[6]="Confirm what is currently on the disks and continue '$rear_workflow'"
+choices[7]="Abort '$rear_workflow'"
+prompt="DASD format choices"
+
+choice=""
+# When USER_INPUT_DASD_FORMAT_CODE_RUN has any 'true' value be liberal in what you accept and
+# assume choices[0] 'Rerun DASD format script' was actually meant
+# regardless that this likely lets 'rear recover' run an endless loop
+# of failed DASD format attempts but ReaR must obey what the user specified
+# (perhaps it is intended to let 'rear recover' loop here until an admin intervenes):
+is_true "$USER_INPUT_DASD_FORMAT_CODE_RUN" && USER_INPUT_DASD_FORMAT_CODE_RUN="${choices[0]}"
+
+unset confirm_choices
+confirm_choices[0]="Confirm recreated DASD format and continue '$rear_workflow'"
+confirm_choices[1]="Go back one step to redo DASD format"
+confirm_choices[2]="Use Relax-and-Recover shell and return back to here"
+confirm_choices[3]="Abort '$rear_workflow'"
+confirm_prompt="Confirm the recreated DASD format or go back one step"
+confirm_choice=""
+# When USER_INPUT_DASD_FORMAT_MIGRATED_CONFIRMATION has any 'true' value be liberal in what you accept and
+# assume confirm_choices[0] 'Confirm recreated DASD format and continue' was actually meant:
+is_true "$USER_INPUT_DASD_FORMAT_MIGRATED_CONFIRMATION" && USER_INPUT_DASD_FORMAT_MIGRATED_CONFIRMATION="${confirm_choices[0]}"
+
+# Run the DASD format code (dasdformat.sh)
+# again and again until it succeeds or the user aborts
+# or the user confirms to continue with what is currently on the disks
+# (the user may have setup manually what he needs via the Relax-and-Recover shell):
+while true ; do
+ prompt="The DASD format had failed"
+ # After switching to recreating with DASD format script
+ # change choices[0] from "Run ..." to "Rerun ...":
+ choices[0]="Rerun DASD format script ($DASD_FORMAT_CODE)"
+ # Run DASD_FORMAT_CODE in a sub-shell because it sets 'set -e'
+ # so that it exits the running shell in case of an error
+ # but that exit must not exit this running bash here:
+ ( source $DASD_FORMAT_CODE )
+ # One must explicitly test whether or not $? is zero in a separated bash command
+ # because with bash 3.x and bash 4.x code like
+ # # ( set -e ; cat qqq ; echo "hello" ) && echo ok || echo failed
+ # cat: qqq: No such file or directory
+ # hello
+ # ok
+ # does not work as one may expect (cf. what "man bash" describes for 'set -e').
+ # There is a subtle behavioural difference between bash 3.x and bash 4.x
+ # when a script that has 'set -e' set gets sourced:
+ # With bash 3.x the 'set -e' inside the sourced script is effective:
+ # # echo 'set -e ; cat qqq ; echo hello' >script.sh
+ # # ( source script.sh ) && echo ok || echo failed
+ # cat: qqq: No such file or directory
+ # failed
+ # With bash 4.x the 'set -e' inside the sourced script gets noneffective:
+ # # echo 'set -e ; cat qqq ; echo hello' >script.sh
+ # # ( source script.sh ) && echo ok || echo failed
+ # cat: qqq: No such file or directory
+ # hello
+ # ok
+ # With bash 3.x and bash 4.x testing $? in a separated bash command
+ # keeps the 'set -e' inside the sourced script effective:
+ # # echo 'set -e ; cat qqq ; echo hello' >script.sh
+ # # ( source script.sh ) ; (( $? == 0 )) && echo ok || echo failed
+ # cat: qqq: No such file or directory
+ # failed
+ # See also https://github.com/rear/rear/pull/1573#issuecomment-344303590
+ if (( $? == 0 )) ; then
+ prompt="DASD format had been successful"
+ # When DASD_FORMAT_CODE succeeded and when not in migration mode
+ # break the outer while loop and continue the "rear recover" workflow
+ # which means continue with restoring the backup:
+ is_true "$MIGRATION_MODE" || break
+ # When DASD_FORMAT_CODE succeeded in migration mode
+ # let the user explicitly confirm the recreated (and usually migrated) format
+ # before continuing the "rear recover" workflow with restoring the backup.
+ # Show the recreated DASD format to the user on his terminal (and also in the log file):
+ LogPrint "Recreated DASD format:"
+ lsdasd_output
+ # Run an inner while loop with a user dialog so that the user can inspect the recreated DASD format
+ # and perhaps even manually fix the recreated DASD format if it is not what the user wants
+ # (e.g. by using the Relax-and-Recover shell and returning back to this user dialog):
+ while true ; do
+ confirm_choice="$( UserInput -I DASD_FORMAT_MIGRATED_CONFIRMATION -p "$confirm_prompt" -D "${confirm_choices[0]}" "${confirm_choices[@]}" )" && wilful_input="yes" || wilful_input="no"
+ case "$confirm_choice" in
+ (${confirm_choices[0]})
+ # Confirm recreated DASD format and continue:
+ is_true "$wilful_input" && LogPrint "User confirmed recreated DASD format" || LogPrint "Continuing with recreated DASD format by default"
+ # Break the outer while loop and continue with restoring the backup:
+ break 2
+ ;;
+ (${confirm_choices[1]})
+ # Go back one step to redo DASD format:
+ # Only break the inner while loop (i.e. this user dialog loop)
+ # and continue with the next user dialog below:
+ break
+ ;;
+ (${confirm_choices[2]})
+ # rear_shell runs 'bash' with the original STDIN STDOUT and STDERR when 'rear' was launched by the user:
+ rear_shell "" "$rear_shell_history"
+ ;;
+ (${confirm_choices[3]})
+ abort_dasd_format
+ Error "User did not confirm the recreated DASD format but aborted '$rear_workflow' in ${BASH_SOURCE[0]}"
+ ;;
+ esac
+ done
+ fi
+ # Run an inner while loop with a user dialog so that the user can fix things
+ # when DASD_FORMAT_CODE failed.
+ # Such a fix does not necessarily mean the user must change
+ # the dasdformat.sh script when DASD_FORMAT_CODE failed.
+ # The user might also fix things by only using the Relax-and-Recover shell and
+ # then confirm what is on the disks and continue with restoring the backup
+ # or abort this "rear recover" run to re-try from scratch.
+ while true ; do
+ choice="$( UserInput -I DASD_FORMAT_CODE_RUN -p "$prompt" -D "${choices[0]}" "${choices[@]}" )" && wilful_input="yes" || wilful_input="no"
+ case "$choice" in
+ (${choices[0]})
+ # Rerun or run (after switching to recreating with DASD format script) DASD format script:
+ is_true "$wilful_input" && LogPrint "User runs DASD format script" || LogPrint "Running DASD format script by default"
+ # Only break the inner while loop (i.e. the user dialog loop):
+ break
+ ;;
+ (${choices[1]})
+ # Run 'less' with the original STDIN STDOUT and STDERR when 'rear' was launched by the user:
+ less $RUNTIME_LOGFILE 0<&6 1>&7 2>&8
+ ;;
+ (${choices[2]})
+ # Run 'vi' with the original STDIN STDOUT and STDERR when 'rear' was launched by the user:
+ vi $DASD_FORMAT_CODE 0<&6 1>&7 2>&8
+ ;;
+ (${choices[3]})
+ LogPrint "This is the current list of DASDs:"
+ lsdasd_output
+ ;;
+ (${choices[4]})
+ # Run 'less' with the original STDIN STDOUT and STDERR when 'rear' was launched by the user:
+ less $original_disk_space_usage_file 0<&6 1>&7 2>&8
+ ;;
+ (${choices[5]})
+ # rear_shell runs 'bash' with the original STDIN STDOUT and STDERR when 'rear' was launched by the user:
+ rear_shell "" "$rear_shell_history"
+ ;;
+ (${choices[6]})
+ # Confirm what is on the disks and continue:
+ # Break the outer while loop and continue with restoring the backup:
+ break 2
+ ;;
+ (${choices[7]})
+ abort_dasd_format
+ Error "User chose to abort '$rear_workflow' in ${BASH_SOURCE[0]}"
+ ;;
+ esac
+ done
+# End of the outer while loop:
+done
+
+# Local functions must be 'unset' because bash does not support 'local function ...'
+# cf. https://unix.stackexchange.com/questions/104755/how-can-i-create-a-local-function-in-my-bashrc
+unset -f lsdasd_output
diff --git a/usr/share/rear/layout/prepare/default/010_prepare_files.sh b/usr/share/rear/layout/prepare/default/010_prepare_files.sh
index 7a980e63..4191be33 100644
--- a/usr/share/rear/layout/prepare/default/010_prepare_files.sh
+++ b/usr/share/rear/layout/prepare/default/010_prepare_files.sh
@@ -7,6 +7,8 @@ LAYOUT_CODE="$VAR_DIR/layout/diskrestore.sh"
LAYOUT_XFS_OPT_DIR="$VAR_DIR/layout/xfs"
LAYOUT_XFS_OPT_DIR_RESTORE="$LAYOUT_XFS_OPT_DIR/restore"
+DASD_FORMAT_CODE="$VAR_DIR/layout/dasdformat.sh"
+
FS_UUID_MAP="$VAR_DIR/layout/fs_uuid_mapping"
LUN_WWID_MAP="$VAR_DIR/layout/lun_wwid_mapping"
diff --git a/usr/share/rear/layout/prepare/default/250_compare_disks.sh b/usr/share/rear/layout/prepare/default/250_compare_disks.sh
index c459b928..751433ba 100644
--- a/usr/share/rear/layout/prepare/default/250_compare_disks.sh
+++ b/usr/share/rear/layout/prepare/default/250_compare_disks.sh
@@ -54,7 +54,9 @@ local more_than_one_same_orig_size=''
# Cf. the "Compare disks one by one" code below:
while read disk dev size junk ; do
if IsInArray "$size" "${original_system_used_disk_sizes[@]}" ; then
- more_than_one_same_orig_size='true'
+ if ! has_mapping_hint "$dev" ; then
+ more_than_one_same_orig_size='true'
+ fi
else
original_system_used_disk_sizes+=( "$size" )
fi
@@ -109,14 +111,17 @@ fi
# No further disk comparisons are needed when MIGRATION_MODE is already set true above:
if ! is_true "$MIGRATION_MODE" ; then
# Compare original disks and their possible target disk one by one:
- while read disk dev size junk ; do
- dev=$( get_sysfs_name $dev )
+ while read disk devnode size junk ; do
+ dev=$( get_sysfs_name $devnode )
Log "Comparing $dev"
if test -e "/sys/block/$dev" ; then
Log "Device /sys/block/$dev exists"
newsize=$( get_disk_size $dev )
if test "$newsize" -eq "$size" ; then
LogPrint "Device $dev has expected (same) size $size bytes (will be used for '$WORKFLOW')"
+ elif test "$( get_mapping_hint $devnode )" == "$devnode" ; then
+ Debug "Found identical mapping hint ${devnode} -> ${devnode}"
+ LogPrint "Device $dev found according to mapping hints (will be used for '$WORKFLOW')"
else
LogPrint "Device $dev has size $newsize bytes but $size bytes is expected (needs manual configuration)"
MIGRATION_MODE='true'
diff --git a/usr/share/rear/layout/prepare/default/300_map_disks.sh b/usr/share/rear/layout/prepare/default/300_map_disks.sh
index 2e90768c..468aa35c 100644
--- a/usr/share/rear/layout/prepare/default/300_map_disks.sh
+++ b/usr/share/rear/layout/prepare/default/300_map_disks.sh
@@ -112,7 +112,14 @@ while read keyword orig_device orig_size junk ; do
# Continue with next original device when it is already used as source in the mapping file:
is_mapping_source "$orig_device" && continue
# First, try to find if there is a current disk with same name and same size as the original:
- sysfs_device_name="$( get_sysfs_name "$orig_device" )"
+ # (possibly influenced by mapping hints if known)
+ if has_mapping_hint "$orig_device" ; then
+ candidate_target_device_name="$( get_mapping_hint "$orig_device" )"
+ Debug "Using mapping hint ${candidate_target_device_name} as candidate for $orig_device mapping"
+ else
+ candidate_target_device_name="$orig_device"
+ fi
+ sysfs_device_name="$( get_sysfs_name "$candidate_target_device_name" )"
current_device="/sys/block/$sysfs_device_name"
if test -e $current_device ; then
current_size=$( get_disk_size $sysfs_device_name )
@@ -122,11 +129,16 @@ while read keyword orig_device orig_size junk ; do
# Continue with next one if the current one is already used as target in the mapping file:
is_mapping_target "$preferred_target_device_name" && continue
# Use the current one if it is of same size as the old one:
- if test "$orig_size" -eq "$current_size" ; then
+ if has_mapping_hint "$orig_device" || test "$orig_size" -eq "$current_size" ; then
# Ensure the determined target device is really a block device:
if test -b "$preferred_target_device_name" ; then
+ if has_mapping_hint "$orig_device" ; then
+ mapping_reason="determined by mapping hint"
+ else
+ mapping_reason="same name and same size $current_size"
+ fi
add_mapping "$orig_device" "$preferred_target_device_name"
- LogPrint "Using $preferred_target_device_name (same name and same size) for recreating $orig_device"
+ LogPrint "Using $preferred_target_device_name ($mapping_reason) for recreating $orig_device"
# Continue with next original device in the LAYOUT_FILE:
continue
fi
diff --git a/usr/share/rear/layout/save/GNU/Linux/200_partition_layout.sh b/usr/share/rear/layout/save/GNU/Linux/200_partition_layout.sh
index 3ab7357d..da6ce64c 100644
--- a/usr/share/rear/layout/save/GNU/Linux/200_partition_layout.sh
+++ b/usr/share/rear/layout/save/GNU/Linux/200_partition_layout.sh
@@ -362,18 +362,27 @@ Log "Saving disk partitions."
if [[ $blockd == dasd* && "$ARCH" == "Linux-s390" ]] ; then
devname=$(get_device_name $disk)
+ dasdnum=$( lsdasd | awk "\$3 == \"$blockd\" { print \$1}" )
+ dasdstatus=$( lsdasd | awk "\$3 == \"$blockd\" { print \$2}" )
+ # ECKD or FBA
+ dasdtype=$( lsdasd | awk "\$3 == \"$blockd\" { print \$5}" )
+ if [ "$dasdtype" != ECKD ] && [ "$dasdtype" != FBA ]; then
+ LogPrint "Type $dasdtype of DASD $blockd unexpected: neither ECKD nor FBA"
+ fi
- echo "# active dasd bus and channel"
- echo "# bus-id <name device> type"
- echo "dasd_channel $( lsdasd|grep $blockd|awk '{ print $1 " " $2 " " $3 " " $4}' )"
-
- echo "# dasdfmt - disk layout is either cdl for the compatible disk layout (default) or ldl"
- echo "# example usage: dasdfmt -b 4096 -d cdl -y /dev/dasda"
- layout=$(dasdview -x /dev/$blockd|grep "^format"|awk '{print $7}')
- blocksize=$( dasdview -i /dev/$blockd|grep blocksize|awk '{print $6}' )
- echo "# dasdfmt $devname"
- echo "# dasdfmt -b <blocksize> -d <layout> -y <devname>"
- echo "dasdfmt -b $blocksize -d $layout -y $devname"
+ echo "# every DASD bus and channel"
+ echo "# Format: dasd_channel <bus-id> <device name>"
+ echo "dasd_channel $dasdnum $blockd"
+
+ # We need to print the dasd_channel line even for ignored devices,
+ # otherwise we could have naming gaps and naming would change when
+ # recreating layout.
+ # E.g. if dasda is ignored, and dasdb is not, we would create only dasdb
+ # during recreation, but it would be named dasda.
+ if [ "$dasdstatus" != active ]; then
+ Log "Ignoring $blockd: it is not active (Status is $dasdstatus)"
+ continue
+ fi
fi
#FIXME: exclude *rpmb (Replay Protected Memory Block) for nvme*, mmcblk* and uas
@@ -387,11 +396,38 @@ Log "Saving disk partitions."
devname=$(get_device_name $disk)
devsize=$(get_disk_size ${disk#/sys/block/})
disktype=$(parted -s $devname print | grep -E "Partition Table|Disk label" | cut -d ":" -f "2" | tr -d " ")
-
- echo "# Disk $devname"
- echo "# Format: disk <devname> <size(bytes)> <partition label type>"
- echo "disk $devname $devsize $disktype"
-
+ if [ "$disktype" != "dasd" ]; then
+ echo "# Disk $devname"
+ echo "# Format: disk <devname> <size(bytes)> <partition label type>"
+ echo "disk $devname $devsize $disktype"
+ elif [[ $blockd == dasd* && "$ARCH" == "Linux-s390" ]] ; then
+ layout=$(dasdview -x $devname |grep "^format"|awk '{print $7}')
+ case "$layout" in
+ (NOT)
+ # NOT -> dasdview has printed "NOT formatted"
+ LogPrintError "Ignoring $blockd: it is not formatted"
+ continue
+ ;;
+ (LDL|CDL)
+ ;;
+ (*)
+ BugError "Invalid 'disk $devname' entry (unknown DASD layout $layout)"
+ ;;
+ esac
+ test $disktype || Error "No partition label type for DASD entry 'disk $devname'"
+ blocksize=$( get_block_size "$blockd" )
+ if ! test $blocksize ; then
+ # fallback - ugly method
+ blocksize=$( dasdview -i $devname |grep blocksize|awk '{print $6}' )
+ test $blocksize || Error "Unknown block size of DASD $devname"
+ fi
+ dasdcyls=$( get_dasd_cylinders "$blockd" )
+ echo "# Disk $devname"
+ echo "# Format: disk <devname> <size(bytes)> <partition label type> <logical block size> <DASD layout> <DASD type> <size(cylinders)>"
+ echo "disk $devname $devsize $disktype $blocksize $layout $dasdtype $dasdcyls"
+ else
+ Error "Invalid 'disk $devname' entry (DASD partition label on non-s390 arch $ARCH)"
+ fi
echo "# Partitions on $devname"
echo "# Format: part <device> <partition size(bytes)> <partition start(bytes)> <partition type|name> <flags> /dev/<partition>"
extract_partitions "$devname"
diff --git a/usr/share/rear/lib/layout-functions.sh b/usr/share/rear/lib/layout-functions.sh
index 91c5ff73..4f5b8f6f 100644
--- a/usr/share/rear/lib/layout-functions.sh
+++ b/usr/share/rear/lib/layout-functions.sh
@@ -93,6 +93,12 @@ abort_recreate() {
restore_original_file "$LAYOUT_FILE"
}
+abort_dasd_format() {
+ Log "Error detected during DASD formatting."
+ Log "Restoring saved original $DASD_FORMAT_FILE"
+ restore_original_file "$DASD_FORMAT_FILE"
+}
+
# Test and log if a component $1 (type $2) needs to be recreated.
create_component() {
local device="$1"
@@ -722,6 +728,46 @@ get_block_size() {
fi
}
+# Get the number of cylinders of a DASD.
+# The number of cylinders has the advantage of being fixed - size depends on formatting
+# and number of cylinders is valid even for unformatted DASDs, size is not.
+get_dasd_cylinders() {
+ local disk_name="${1##*/}" # /some/path/dasda -> dasda
+ local dasd_cyls
+
+ dasd_cyls=$(dasdview -i /dev/$disk_name | grep cylinders | cut -d ':' -f2 | awk '{print $4}')
+ ### Make sure we always return a number
+ echo $(( dasd_cyls ))
+}
+
+# Sometimes we know what the new device for the original device should be in a more reliable way
+# than by looking at disk sizes. THis information is called "mapping hints". Let's pass them
+# to the mapping code using the DISK_MAPPING_HINTS array. Each element of the array has the form
+# "/dev/source /dev/target" (space-separated).
+
+# Output the mapping hint for the original device.
+function get_mapping_hint () {
+ local device="$1"
+ local hint mapping_hint_source mapping_hint_target
+
+ for hint in "${DISK_MAPPING_HINTS[@]}"; do
+ mapping_hint_source=${hint%% *}
+ mapping_hint_target=${hint##* }
+ if [ "${device}" == "${mapping_hint_source}" ] ; then
+ echo "$mapping_hint_target"
+ return 0
+ fi
+ done
+ return 1
+}
+
+# Determine if there is a mapping hint for the original device.
+function has_mapping_hint () {
+ local device="$1"
+
+ get_mapping_hint "$device" > /dev/null
+}
+
# Get the UUID of a device.
# Device is something like /dev/sda1.
blkid_uuid_of_device() {
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