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rear/rear-bz2131946.patch
Pavel Cahyna c9c2254b37 Apply upstream PR #2431 
Migrate XFS configuration files.

Resolves: rhbz2160748
2023-01-15 09:40:39 +01:00

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diff --git a/usr/share/rear/layout/prepare/GNU/Linux/131_include_filesystem_code.sh b/usr/share/rear/layout/prepare/GNU/Linux/131_include_filesystem_code.sh
index 172ac032..9cff63a0 100644
--- a/usr/share/rear/layout/prepare/GNU/Linux/131_include_filesystem_code.sh
+++ b/usr/share/rear/layout/prepare/GNU/Linux/131_include_filesystem_code.sh
@@ -143,9 +143,9 @@ function create_fs () {
# unless the user has explicitly specified XFS filesystem options:
local xfs_opts
local xfs_device_basename="$( basename $device )"
- local xfs_info_filename="$LAYOUT_XFS_OPT_DIR/$xfs_device_basename.xfs"
+ local xfs_info_filename="$LAYOUT_XFS_OPT_DIR_RESTORE/$xfs_device_basename.xfs"
# Only uppercase letters and digits are used to ensure mkfs_xfs_options_variable_name is a valid bash variable name
- # even in case of complicated device nodes e.g. things like /dev/mapper/SIBM_2810XIV_78033E7012F-part3
+ # even in case of complicated device nodes e.g. things like /dev/mapper/SIBM_2810XIV_78033E7012F-part3
# cf. current_orig_device_basename_alnum_uppercase in layout/prepare/default/300_map_disks.sh
local xfs_device_basename_alnum_uppercase="$( echo $xfs_device_basename | tr -d -c '[:alnum:]' | tr '[:lower:]' '[:upper:]' )"
# cf. predefined_input_variable_name in the function UserInput in lib/_input-output-functions.sh
diff --git a/usr/share/rear/layout/prepare/default/010_prepare_files.sh b/usr/share/rear/layout/prepare/default/010_prepare_files.sh
index 85964712..7a980e63 100644
--- a/usr/share/rear/layout/prepare/default/010_prepare_files.sh
+++ b/usr/share/rear/layout/prepare/default/010_prepare_files.sh
@@ -5,6 +5,7 @@ LAYOUT_DEPS="$VAR_DIR/layout/diskdeps.conf"
LAYOUT_TODO="$VAR_DIR/layout/disktodo.conf"
LAYOUT_CODE="$VAR_DIR/layout/diskrestore.sh"
LAYOUT_XFS_OPT_DIR="$VAR_DIR/layout/xfs"
+LAYOUT_XFS_OPT_DIR_RESTORE="$LAYOUT_XFS_OPT_DIR/restore"
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/319_rename_xfs_configs.sh b/usr/share/rear/layout/prepare/default/319_rename_xfs_configs.sh
new file mode 100644
index 00000000..406afa61
--- /dev/null
+++ b/usr/share/rear/layout/prepare/default/319_rename_xfs_configs.sh
@@ -0,0 +1,83 @@
+# Cleanup directory which hold XFS configuration file for `rear recover'.
+# This will avoid possible mess in LAYOUT_XFS_OPT_DIR_RESTORE if `rear recover'
+# would be launched multiple times, where user will choose different disk
+# mapping each time.
+# Removing and creating LAYOUT_XFS_OPT_DIR_RESTORE will ensure that ReaR will
+# have only current files available during current session.
+rm -rf "$LAYOUT_XFS_OPT_DIR_RESTORE"
+mkdir -p "$LAYOUT_XFS_OPT_DIR_RESTORE"
+
+local excluded_configs=()
+
+# Read $MAPPING_FILE (disk_mappings) to discover final disk mapping.
+# Once mapping is known, configuration files can be renamed.
+# (e.g. sds2.xfs to sdb2.xfs, ...)
+while read source target junk ; do
+ # Disks in MAPPING_FILE are listed with full device path. Since XFS config
+ # files are created in format e.g. sda2.xfs strip prefixed path to have
+ # only short device name available.
+ base_source=$(basename "$source")
+ base_target=$(basename "$target")
+
+ # Check if XFS configuration file for whole device (unpartitioned)
+ # is available (sda, sdb, ...). If so, rename and copy it to
+ # LAYOUT_XFS_OPT_DIR_RESTORE.
+ if [ -e "$LAYOUT_XFS_OPT_DIR/$base_source.xfs" ]; then
+ Log "Migrating XFS configuration file $base_source.xfs to $base_target.xfs"
+ cp "$v" "$LAYOUT_XFS_OPT_DIR/$base_source.xfs" \
+ "$LAYOUT_XFS_OPT_DIR_RESTORE/$base_target.xfs"
+
+ # Replace old device name in meta-data= option in XFS
+ # configuration file as well.
+ sed -i s#"meta-data=${source}\(\s\)"#"meta-data=${target}\1"# \
+ "$LAYOUT_XFS_OPT_DIR_RESTORE/$base_target.xfs"
+
+ # Mark XFS config file as processed to avoid copying it again later.
+ # More details on why are configs excluded can be found near the
+ # end of this script (near `tar' command).
+ excluded_configs+=("--exclude=$base_source.xfs")
+ fi
+
+ # Find corresponding partitions to source disk in LAYOUT_FILE
+ # and migrate/rename them too if necessary.
+ while read _ layout_device _ _ _ _ layout_partition; do
+ if [[ "$source" = "$layout_device" ]]; then
+ base_src_layout_partition=$(basename "$layout_partition")
+ base_dst_layout_partition=${base_src_layout_partition//$base_source/$base_target}
+ dst_layout_partition=${layout_partition//$base_source/$base_target}
+
+ if [ -e "$LAYOUT_XFS_OPT_DIR/$base_src_layout_partition.xfs" ]; then
+ Log "Migrating XFS configuration $base_src_layout_partition.xfs to $base_dst_layout_partition.xfs"
+ cp "$v" "$LAYOUT_XFS_OPT_DIR/$base_src_layout_partition.xfs" \
+ "$LAYOUT_XFS_OPT_DIR_RESTORE/$base_dst_layout_partition.xfs"
+
+ # Replace old device name in meta-data= option in XFS
+ # configuration file as well.
+ sed -i s#"meta-data=${layout_partition}\(\s\)"#"meta-data=${dst_layout_partition}\1"# \
+ "$LAYOUT_XFS_OPT_DIR_RESTORE/$base_dst_layout_partition.xfs"
+
+ # Mark XFS config file as processed to avoid copying it again later.
+ # More details on why are configs excluded can be found near the
+ # end of this script (near `tar' command).
+ excluded_configs+=("--exclude=$base_src_layout_partition.xfs")
+ fi
+ fi
+ done < <( grep -E "^part " "$LAYOUT_FILE" )
+done < <( grep -v '^#' "$MAPPING_FILE" )
+
+pushd "$LAYOUT_XFS_OPT_DIR" >/dev/null
+# Copy remaining files
+# We need to copy remaining files into LAYOUT_XFS_OPT_DIR_RESTORE which will
+# serve as base dictionary where ReaR will look for XFS config files.
+# It is necessary to copy only files that were not previously processed,
+# because in LAYOUT_XFS_OPT_DIR they are still listed with
+# original name and copy to LAYOUT_XFS_OPT_DIR_RESTORE could overwrite
+# XFS configs already migrated.
+# e.g. with following disk mapping situation:
+# /dev/sda2 => /dev/sdb2
+# /dev/sdb2 => /dev/sda2
+# Files in LAYOUT_XFS_OPT_DIR_RESTORE would be overwritten by XFS configs with
+# wrong names.
+# tar is used to take advantage of its exclude feature.
+tar cf - --exclude=restore "${excluded_configs[@]}" . | tar xfp - -C "$LAYOUT_XFS_OPT_DIR_RESTORE"
+popd >/dev/null
diff --git a/usr/share/rear/layout/save/GNU/Linux/100_create_layout_file.sh b/usr/share/rear/layout/save/GNU/Linux/100_create_layout_file.sh
index 7895e4ee..fc0fa8fc 100644
--- a/usr/share/rear/layout/save/GNU/Linux/100_create_layout_file.sh
+++ b/usr/share/rear/layout/save/GNU/Linux/100_create_layout_file.sh
@@ -10,6 +10,7 @@ mkdir -p $v $VAR_DIR/layout/config
# We need directory for XFS options only if XFS is in use:
if test "$( mount -t xfs )" ; then
LAYOUT_XFS_OPT_DIR="$VAR_DIR/layout/xfs"
+ rm -rf $LAYOUT_XFS_OPT_DIR
mkdir -p $v $LAYOUT_XFS_OPT_DIR
fi
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