From f2c5c5c961a91765640f381ec37af085dc91312b Mon Sep 17 00:00:00 2001

From: Hari Bathini <hbathini@linux.vnet.ibm.com>

Date: Thu, 16 Jan 2014 12:11:27 +0530

Subject: [PATCH] Dracut: Add a new argument "--rebuild"

Add "rebuild" option to dracut to  append the current  arguments

to those with  which the input initramfs image was  built.  This

option helps in incrementally building initramfs for testing.

    Usage: dracut [output_file] --rebuild input_file

If optional output file  is not provided, input file provided to

rebuild will be used as output file.

This patch alters  the creation of the initramfs image by adding

the file "/tmp/params.txt" to the image. Command line parameters

excluding "--rebuild",  input  &  output image names and "kernel

version" are stored in this file.  In case "--rebuild" parameter

is specified, "/tmp/params.txt" file, if present in input image,

is read and its contents "prepend"ed to the current command line

parameters, that is if such a file is already present. Also,  it

stores the  cumulative parameters to the file "/tmp/params.txt",

in the  new image. This patch  has been tested successfully on a

PowerBox with f19. It does not alter the behaviour of any of the

existing  options.

Signed-off-by: Manik Bajpai <manibajp@linux.vnet.ibm.com>

Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>

[Edited-by: Harald Hoyer]

Simplified the cpio extraction process by using 'lsinitrd'.

(cherry picked from commit 659dc319d950999f8d191a81fdc4d3114e9213de)

---

 dracut.sh | 342 ++++++++++++++++++++++++++++++++++++++------------------------

 1 file changed, 210 insertions(+), 132 deletions(-)

diff --git a/dracut.sh b/dracut.sh

index 8e5e86f7..eff096e5 100755

--- a/dracut.sh

+++ b/dracut.sh

@@ -70,6 +70,7 @@ Creates initial ramdisk images for preloading modules

   --kver [VERSION]      Set kernel version to [VERSION].

   -f, --force           Overwrite existing initramfs file.

   -a, --add [LIST]      Add a space-separated list of dracut modules.

+  --rebuild         Append arguments to those of existing image and rebuild

   -m, --modules [LIST]  Specify a space-separated list of dracut modules to

                          call when building the initramfs. Modules are located

                          in /usr/lib/dracut/modules.d.

@@ -283,132 +284,213 @@ dropindirs_sort()

     }

 }

+rearrange_params()

+{

+    # Workaround -i, --include taking 2 arguments

+    set -- "${@/--include/++include}"

+

+    # This prevents any long argument ending with "-i"

+    # -i, like --opt-i but I think we can just prevent that

+    set -- "${@/%-i/++include}"

+

+    TEMP=$(unset POSIXLY_CORRECT; getopt \

+        -o "a:m:o:d:I:k:c:L:fvqlHhMN" \

+        --long kver: \

+        --long add: \

+        --long force-add: \

+        --long add-drivers: \

+        --long omit-drivers: \

+        --long modules: \

+        --long omit: \

+        --long drivers: \

+        --long filesystems: \

+        --long install: \

+        --long fwdir: \

+        --long libdirs: \

+        --long fscks: \

+        --long add-fstab: \

+        --long mount: \

+        --long device: \

+        --long add-device: \

+        --long nofscks: \

+        --long ro-mnt \

+        --long kmoddir: \

+        --long conf: \

+        --long confdir: \

+        --long tmpdir: \

+        --long stdlog: \

+        --long compress: \

+        --long prefix: \

+        --long rebuild: \

+        --long force \

+        --long kernel-only \

+        --long no-kernel \

+        --long print-cmdline \

+        --long kernel-cmdline: \

+        --long strip \

+        --long nostrip \

+        --long prelink \

+        --long noprelink \

+        --long hardlink \

+        --long nohardlink \

+        --long noprefix \

+        --long mdadmconf \

+        --long nomdadmconf \

+        --long lvmconf \

+        --long nolvmconf \

+        --long debug \

+        --long profile \

+        --long sshkey: \

+        --long logfile: \

+        --long verbose \

+        --long quiet \

+        --long local \

+        --long hostonly \

+        --long host-only \

+        --long no-hostonly \

+        --long no-host-only \

+        --long hostonly-cmdline \

+        --long no-hostonly-cmdline \

+        --long persistent-policy: \

+        --long fstab \

+        --long help \

+        --long bzip2 \

+        --long lzma \

+        --long xz \

+        --long lzo \

+        --long lz4 \

+        --long no-compress \

+        --long gzip \

+        --long list-modules \

+        --long show-modules \

+        --long keep \

+        --long printsize \

+        --long regenerate-all \

+        --long noimageifnotneeded \

+        --long early-microcode \

+        --long no-early-microcode \

+        -- "$@")

+

+    if (( $? != 0 )); then

+        usage

+        exit 1

+    fi

+}

+

 verbosity_mod_l=0

 unset kernel

 unset outfile

-# Workaround -i, --include taking 2 arguments

-set -- "${@/--include/++include}"

-

-# This prevents any long argument ending with "-i"

-# -i, like --opt-i but I think we can just prevent that

-set -- "${@/%-i/++include}"

-

-TEMP=$(unset POSIXLY_CORRECT; getopt \

-    -o "a:m:o:d:I:k:c:L:fvqlHhMN" \

-    --long kver: \

-    --long add: \

-    --long force-add: \

-    --long add-drivers: \

-    --long omit-drivers: \

-    --long modules: \

-    --long omit: \

-    --long drivers: \

-    --long filesystems: \

-    --long install: \

-    --long fwdir: \

-    --long libdirs: \

-    --long fscks: \

-    --long add-fstab: \

-    --long mount: \

-    --long device: \

-    --long add-device: \

-    --long nofscks: \

-    --long ro-mnt \

-    --long kmoddir: \

-    --long conf: \

-    --long confdir: \

-    --long tmpdir: \

-    --long stdlog: \

-    --long compress: \

-    --long prefix: \

-    --long force \

-    --long kernel-only \

-    --long no-kernel \

-    --long print-cmdline \

-    --long kernel-cmdline: \

-    --long strip \

-    --long nostrip \

-    --long prelink \

-    --long noprelink \

-    --long hardlink \

-    --long nohardlink \

-    --long noprefix \

-    --long mdadmconf \

-    --long nomdadmconf \

-    --long lvmconf \

-    --long nolvmconf \

-    --long debug \

-    --long profile \

-    --long sshkey: \

-    --long logfile: \

-    --long verbose \

-    --long quiet \

-    --long local \

-    --long hostonly \

-    --long host-only \

-    --long no-hostonly \

-    --long no-host-only \

-    --long hostonly-cmdline \

-    --long no-hostonly-cmdline \

-    --long persistent-policy: \

-    --long fstab \

-    --long help \

-    --long bzip2 \

-    --long lzma \

-    --long xz \

-    --long lzo \

-    --long lz4 \

-    --long no-compress \

-    --long gzip \

-    --long list-modules \

-    --long show-modules \

-    --long keep \

-    --long printsize \

-    --long regenerate-all \

-    --long noimageifnotneeded \

-    --long early-microcode \

-    --long no-early-microcode \

-    -- "$@")

-

-if (( $? != 0 )); then

-    usage

-    exit 1

+rearrange_params "$@"

+eval set -- "$TEMP"

+

+# parse command line args to check if '--rebuild' option is present

+unset append_args_l

+unset rebuild_file

+while :

+do

+	if [ "$1" == "--" ]; then

+	    shift; break

+	fi

+	if [ "$1" == "--rebuild" ]; then

+	    append_args_l="yes"

+            rebuild_file=$2

+            if [ ! -e $rebuild_file ]; then

+                echo "Image file '$rebuild_file', for rebuild, does not exist!"

+                exit 1

+            fi

+            abs_rebuild_file=$(readlink -f "$rebuild_file") && rebuild_file="$abs_rebuild_file"

+	    shift; continue

+	fi

+	shift

+done

+

+# get output file name and kernel version from command line arguments

+while (($# > 0)); do

+    case ${1%%=*} in

+        ++include)

+            shift 2;;

+        *)

+            if ! [[ ${outfile+x} ]]; then

+                outfile=$1

+            elif ! [[ ${kernel+x} ]]; then

+                kernel=$1

+            else

+                printf "\nUnknown arguments: %s\n\n" "$*" >&2

+                usage; exit 1;

+            fi

+            ;;

+    esac

+    shift

+done

+

+# extract input image file provided with rebuild option to get previous parameters, if any

+if [[ $append_args_l == "yes" ]]; then

+    unset rebuild_param

+

+    # determine resultant file

+    if ! [[ $outfile ]]; then

+        outfile=$rebuild_file

+    fi

+

+    if ! rebuild_param=$(lsinitrd $rebuild_file '*lib/dracut/build-parameter.txt'); then

+        echo "Image '$rebuild_file' has no rebuild information stored"

+        exit 1

+    fi

+

+    # prepend previous parameters to current command line args

+    if [[ $rebuild_param ]]; then

+        TEMP="$rebuild_param $TEMP"

+        eval set -- "$TEMP"

+        rearrange_params "$@"

+    fi

+

+    # clean the temporarily used scratch-pad directory

+    rm -rf $scratch_dir

 fi

+unset PARMS_TO_STORE

+PARMS_TO_STORE=""

+

 eval set -- "$TEMP"

 while :; do

+    if [ $1 != "--" ] && [ $1 != "--rebuild" ]; then

+        PARMS_TO_STORE+=" $1";

+    fi

     case $1 in

-        --kver)        kernel="$2"; shift;;

-        -a|--add)      push add_dracutmodules_l  "$2"; shift;;

-        --force-add)   push force_add_dracutmodules_l  "$2"; shift;;

-        --add-drivers) push add_drivers_l        "$2"; shift;;

-        --omit-drivers)

-                       push omit_drivers_l      "$2"; shift;;

-        -m|--modules)  push dracutmodules_l      "$2"; shift;;

-        -o|--omit)     push omit_dracutmodules_l "$2"; shift;;

-        -d|--drivers)  push drivers_l            "$2"; shift;;

-        --filesystems) push filesystems_l        "$2"; shift;;

-        -I|--install)  push install_items_l      "$2"; shift;;

-        --fwdir)       push fw_dir_l             "$2"; shift;;

-        --libdirs)     push libdirs_l            "$2"; shift;;

-        --fscks)       push fscks_l              "$2"; shift;;

-        --add-fstab)   push add_fstab_l          "$2"; shift;;

-        --mount)       push fstab_lines          "$2"; shift;;

+        --kver)        kernel="$2";                    PARMS_TO_STORE+=" '$2'"; shift;;

+        -a|--add)      push add_dracutmodules_l  "$2"; PARMS_TO_STORE+=" '$2'"; shift;;

+        --force-add)   push force_add_dracutmodules_l  "$2"; PARMS_TO_STORE+=" '$2'"; shift;;

+        --add-drivers) push add_drivers_l        "$2"; PARMS_TO_STORE+=" '$2'"; shift;;

+        --omit-drivers) push omit_drivers_l      "$2"; PARMS_TO_STORE+=" '$2'"; shift;;

+        -m|--modules)  push dracutmodules_l      "$2"; PARMS_TO_STORE+=" '$2'"; shift;;

+        -o|--omit)     push omit_dracutmodules_l "$2"; PARMS_TO_STORE+=" '$2'"; shift;;

+        -d|--drivers)  push drivers_l            "$2"; PARMS_TO_STORE+=" '$2'"; shift;;

+        --filesystems) push filesystems_l        "$2"; PARMS_TO_STORE+=" '$2'"; shift;;

+        -I|--install)  push install_items_l      "$2"; PARMS_TO_STORE+=" '$2'"; shift;;

+        --fwdir)       push fw_dir_l             "$2"; PARMS_TO_STORE+=" '$2'"; shift;;

+        --libdirs)     push libdirs_l            "$2"; PARMS_TO_STORE+=" '$2'"; shift;;

+        --fscks)       push fscks_l              "$2"; PARMS_TO_STORE+=" '$2'"; shift;;

+        --add-fstab)   push add_fstab_l          "$2"; PARMS_TO_STORE+=" '$2'"; shift;;

+        --mount)       push fstab_lines          "$2"; PARMS_TO_STORE+=" '$2'"; shift;;

         --add-device|--device)

-                       push add_device_l         "$2"; shift;;

-        --kernel-cmdline)

-                       push kernel_cmdline_l  "$2"; shift;;

+                       push add_device_l         "$2"; PARMS_TO_STORE+=" '$2'"; shift;;

+        --kernel-cmdline) push kernel_cmdline_l  "$2"; PARMS_TO_STORE+=" '$2'"; shift;;

         --nofscks)     nofscks_l="yes";;

         --ro-mnt)      ro_mnt_l="yes";;

-        -k|--kmoddir)  drivers_dir_l="$2"; shift;;

-        -c|--conf)     conffile="$2"; shift;;

-        --confdir)     confdir="$2"; shift;;

-        --tmpdir)      tmpdir_l="$2"; shift;;

-        -L|--stdlog)   stdloglvl_l="$2"; shift;;

-        --compress)    compress_l="$2"; shift;;

-        --prefix)      prefix_l="$2"; shift;;

+        -k|--kmoddir)  drivers_dir_l="$2";             PARMS_TO_STORE+=" '$2'"; shift;;

+        -c|--conf)     conffile="$2";                  PARMS_TO_STORE+=" '$2'"; shift;;

+        --confdir)     confdir="$2";                   PARMS_TO_STORE+=" '$2'"; shift;;

+        --tmpdir)      tmpdir_l="$2";                  PARMS_TO_STORE+=" '$2'"; shift;;

+        -L|--stdlog)   stdloglvl_l="$2";               PARMS_TO_STORE+=" '$2'"; shift;;

+        --compress)    compress_l="$2";                PARMS_TO_STORE+=" '$2'"; shift;;

+        --prefix)      prefix_l="$2";                  PARMS_TO_STORE+=" '$2'"; shift;;

+        --rebuild)     if [ $rebuild_file == $outfile ]; then

+                           force=yes

+                       fi

+                       shift

+                       ;;

         -f|--force)    force=yes;;

         --kernel-only) kernel_only="yes"; no_kernel="no";;

         --no-kernel)   kernel_only="no"; no_kernel="yes";;

@@ -431,7 +513,7 @@ while :; do

         --nolvmconf)   lvmconf_l="no";;

         --debug)       debug="yes";;

         --profile)     profile="yes";;

-        --sshkey)      sshkey="$2"; shift;;

+        --sshkey)      sshkey="$2";                    PARMS_TO_STORE+=" '$2'"; shift;;

         --logfile)     logfile_l="$2"; shift;;

         -v|--verbose)  ((verbosity_mod_l++));;

         -q|--quiet)    ((verbosity_mod_l--));;

@@ -449,11 +531,10 @@ while :; do

         --no-hostonly-cmdline)

                        hostonly_cmdline_l="no" ;;

         --persistent-policy)

-                       persistent_policy_l="$2"; shift;;

+                       persistent_policy_l="$2";       PARMS_TO_STORE+=" '$2'"; shift;;

         --fstab)       use_fstab_l="yes" ;;

         -h|--help)     long_usage; exit 1 ;;

-        -i|--include)

-                       push include_src "$2"

+        -i|--include)  push include_src "$2";          PARMS_TO_STORE+=" '$2'";

                        shift;;

         --bzip2)       compress_l="bzip2";;

         --lzma)        compress_l="lzma";;

@@ -483,21 +564,12 @@ done

 # the old fashioned way

 while (($# > 0)); do

-    case ${1%%=*} in

-        ++include) push include_src "$2"

-                       push include_target "$3"

-                       shift 2;;

-        *)

-            if ! [[ ${outfile+x} ]]; then

-                outfile=$1

-            elif ! [[ ${kernel+x} ]]; then

-                kernel=$1

-            else

-                printf "\nUnknown arguments: %s\n\n" "$*" >&2

-                usage; exit 1;

-            fi

-            ;;

-    esac

+    if [ ${1%%=*} == "++include" ]; then

+        push include_src "$2"

+        push include_target "$3"

+        PARMS_TO_STORE+=" --include '$2' '$3'"

+        shift 2

+    fi

     shift

 done

@@ -1405,6 +1477,12 @@ if [[ $acpi_override = yes ]] && [[ -d $acpi_table_dir ]]; then

     done

 fi

+dinfo "*** Store current command line parameters ***"

+if ! ( echo $PARMS_TO_STORE > $initdir/lib/dracut/build-parameter.txt ); then

+    dfatal "Could not store the current command line parameters"

+    exit 1

+fi

+

 rm -f -- "$outfile"

 dinfo "*** Creating image file ***"