lkml.org 
[lkml]   [2008]   [May]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 64/67] aufs pseudo-link helper
    Date
    From: Junjiro Okajima <hooanon05@yahoo.co.jp>

    initial commit
    aufs pseudo-link helper

    Signed-off-by: Junjiro Okajima <hooanon05@yahoo.co.jp>
    ---
    Documentation/filesystems/aufs/auplink | 170 ++++++++++++++++++++++++++++++++
    1 files changed, 170 insertions(+), 0 deletions(-)

    diff --git a/Documentation/filesystems/aufs/auplink b/Documentation/filesystems/aufs/auplink
    new file mode 100755
    index 0000000..52daf3f
    --- /dev/null
    +++ b/Documentation/filesystems/aufs/auplink
    @@ -0,0 +1,170 @@
    +#!/bin/sh
    +
    +# Copyright (C) 2006, 2007, 2008 Junjiro Okajima
    +#
    +# This program, aufs is free software; you can redistribute it and/or modify
    +# it under the terms of the GNU General Public License as published by
    +# the Free Software Foundation; either version 2 of the License, or
    +# (at your option) any later version.
    +#
    +# This program is distributed in the hope that it will be useful,
    +# but WITHOUT ANY WARRANTY; without even the implied warranty of
    +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    +# GNU General Public License for more details.
    +#
    +# 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 St, Fifth Floor, Boston, MA 02110-1301 USA
    +
    +# $Id: auplink,v 1.9 2008/03/31 07:44:10 sfjro Exp $
    +
    +#set -x; echo $0 $@
    +tmp=/tmp/$$
    +set -e
    +
    +Usage()
    +{
    + cat <<- EOF 1>&2
    + usage: $0 aufs_mount_point list|cpup|flush
    + 'list' shows the pseudo-linked inode numbers and filenames.
    + 'cpup' copies-up all pseudo-link to the writeble branch.
    + 'flush' calls 'cpup', and then "mount -o remount,clean_plink=inum"
    + and remove the whiteouted plink.
    + EOF
    + rm -f $tmp $tmp.*
    + exit 1
    +}
    +
    +eecho() { echo "$@" 1>&2; }
    +
    +conv() # [escape]
    +{
    + sed -r -e '
    + s/\\/\\134/g
    + s/$/\\012/
    + ' |
    + tr -d '\n' |
    + sed -r -e '
    + s/ /\\040/g
    + s/\t/\\011/g
    + s/\r/\\015/g
    + s/\\012$//
    + ' |
    + { test "$1" = "escape" && sed -r -e 's/\\/\\\\/g' || cat; }
    + echo
    +}
    +
    +Find() # dir [ find_args ]
    +{
    + dir="$1"
    + shift
    + find "$dir" -xdev -noleaf $@
    +}
    +
    +List()
    +{
    + sed -e 's/^\([0-9]*\) .*$/-o -inum \1/' |
    + cut -c3- |
    + xargs -n 200 |
    + while read args
    + do Find "$mntpnt" \( $args \) $@
    + done
    +}
    +
    +Cpup()
    +{
    + List \( \( -type l -fprint $tmp.slink \) \
    + -o ! -type l -fprint $tmp.other \)
    +
    + # do nothing but update something. it causes copyup.
    + xargs -r touch -ac -r $tmp.other < $tmp.other
    + xargs -r aulchown < $tmp.slink
    +}
    +
    +test $# -eq 2 || Usage
    +cd "$1"
    +mntpnt=`readlink -f "$PWD"`
    +e_mntpnt=`echo "$mntpnt" | conv escape`
    +cd "$OLDPWD"
    +
    +do_flush=0
    +f=${AUPLINK_CONFIG:-/etc/default/auplink}
    +if [ -r $f ]
    +then
    + . $f
    + for i in $FLUSH
    + do
    + test "$i" = "$mntpnt" -o "$i" = "ALL" || continue
    + do_flush=1
    + break
    + done
    +fi
    +case $2 in
    +cpup|flush) test $do_flush -eq 0 && exit 0;;
    +esac
    +
    +ent=`grep " $e_mntpnt aufs .*,si=" /proc/mounts | tail -n 1`
    +test ! "$ent" && exit 0
    +eval `echo "$ent" | tr ',' '\n' | grep '^si='`
    +test ! "$si" && eecho no such mount-point $e_mntpnt && exit 1
    +
    +si_dir=/sys/fs/aufs/si_$si
    +if [ -r $si_dir/br0 ]
    +then
    + cd $si_dir
    + ls -1 br* |
    + cut -c3- |
    + sort -n |
    + sed -e 's/^/br/' |
    + xargs -rn 200 cat
    + cd $OLDPWD
    +else
    + echo "$ent" |
    + tr ',' '\n' |
    + sed -e 's/\\/\\\\/g' |
    + egrep '^(dirs=|br:)' |
    + tr ':' '\n'
    +fi |
    +grep '=rw$' |
    +sed -e 's/=rw$//' |
    +while read wbr
    +do
    + d=`echo $wbr/.wh..wh.plink`
    + # -printf '%n %p\n'
    + test -d "$d" && Find "$d" -maxdepth 1 ! -type d -printf '%n\t%p\n'
    +done |
    +while read nlink pname
    +do
    + inum=`basename "$pname" | cut -f1 -d.`
    + echo $inum $nlink "$pname"
    +done > $tmp
    +test -s $tmp || { rm -f $tmp $tmp.*; exit 0; }
    +
    +# debug
    +#mount -o remount,list_plink "$mntpnt"
    +
    +case $2 in
    +list)
    + cut -f1 -d' ' $tmp | tr '\n' ' '
    + echo
    + List < $tmp
    + ;;
    +cpup)
    + Cpup < $tmp
    + ;;
    +flush)
    + #echo -n Flushing pseudo-links on "$mntpnt"...
    + Cpup < $tmp
    +
    + # all are copied-up, and then remove all pseudo-links.
    + mount -o remount,clean_plink "$mntpnt"
    + cut -f3- -d' ' $tmp | xargs -r rm
    + # debug
    + #mount -o remount,list_plink "$mntpnt"
    + #echo done.
    + ;;
    +*)
    + Usage;;
    +esac
    +
    +rm -f $tmp $tmp.*
    --
    1.4.4.4


    \
     
     \ /
      Last update: 2008-05-16 17:09    [W:0.031 / U:0.276 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site