ia64/linux-2.6.18-xen.hg

view scripts/gen_initramfs_list.sh @ 893:f994bfe9b93b

linux/blktap2: reduce TLB flush scope

c/s 885 added very coarse TLB flushing. Since these flushes always
follow single page updates, single page flushes (when available) are
sufficient.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Jun 04 10:32:57 2009 +0100 (2009-06-04)
parents 831230e53067
children
line source
1 #!/bin/bash
2 # Copyright (C) Martin Schlemmer <azarah@nosferatu.za.org>
3 # Copyright (c) 2006 Sam Ravnborg <sam@ravnborg.org>
4 #
5 # Released under the terms of the GNU GPL
6 #
7 # Generate a cpio packed initramfs. It uses gen_init_cpio to generate
8 # the cpio archive, and gzip to pack it.
9 # The script may also be used to generate the inputfile used for gen_init_cpio
10 # This script assumes that gen_init_cpio is located in usr/ directory
12 # error out on errors
13 set -e
15 usage() {
16 cat << EOF
17 Usage:
18 $0 [-o <file>] [-u <uid>] [-g <gid>] {-d | <cpio_source>} ...
19 -o <file> Create gzipped initramfs file named <file> using
20 gen_init_cpio and gzip
21 -u <uid> User ID to map to user ID 0 (root).
22 <uid> is only meaningful if <cpio_source>
23 is a directory.
24 -g <gid> Group ID to map to group ID 0 (root).
25 <gid> is only meaningful if <cpio_source>
26 is a directory.
27 <cpio_source> File list or directory for cpio archive.
28 If <cpio_source> is a .cpio file it will be used
29 as direct input to initramfs.
30 -d Output the default cpio list.
32 All options except -o and -l may be repeated and are interpreted
33 sequentially and immediately. -u and -g states are preserved across
34 <cpio_source> options so an explicit "-u 0 -g 0" is required
35 to reset the root/group mapping.
36 EOF
37 }
39 list_default_initramfs() {
40 # echo usr/kinit/kinit
41 :
42 }
44 default_initramfs() {
45 cat <<-EOF >> ${output}
46 # This is a very simple, default initramfs
48 dir /dev 0755 0 0
49 nod /dev/console 0600 0 0 c 5 1
50 dir /root 0700 0 0
51 # file /kinit usr/kinit/kinit 0755 0 0
52 # slink /init kinit 0755 0 0
53 EOF
54 }
56 filetype() {
57 local argv1="$1"
59 # symlink test must come before file test
60 if [ -L "${argv1}" ]; then
61 echo "slink"
62 elif [ -f "${argv1}" ]; then
63 echo "file"
64 elif [ -d "${argv1}" ]; then
65 echo "dir"
66 elif [ -b "${argv1}" -o -c "${argv1}" ]; then
67 echo "nod"
68 elif [ -p "${argv1}" ]; then
69 echo "pipe"
70 elif [ -S "${argv1}" ]; then
71 echo "sock"
72 else
73 echo "invalid"
74 fi
75 return 0
76 }
78 list_print_mtime() {
79 :
80 }
82 print_mtime() {
83 local my_mtime="0"
85 if [ -e "$1" ]; then
86 my_mtime=$(find "$1" -printf "%T@\n" | sort -r | head -n 1)
87 fi
89 echo "# Last modified: ${my_mtime}" >> ${output}
90 echo "" >> ${output}
91 }
93 list_parse() {
94 echo "$1 \\"
95 }
97 # for each file print a line in following format
98 # <filetype> <name> <path to file> <octal mode> <uid> <gid>
99 # for links, devices etc the format differs. See gen_init_cpio for details
100 parse() {
101 local location="$1"
102 local name="${location/${srcdir}//}"
103 # change '//' into '/'
104 name="${name//\/\///}"
105 local mode="$2"
106 local uid="$3"
107 local gid="$4"
108 local ftype=$(filetype "${location}")
109 # remap uid/gid to 0 if necessary
110 [ "$uid" -eq "$root_uid" ] && uid=0
111 [ "$gid" -eq "$root_gid" ] && gid=0
112 local str="${mode} ${uid} ${gid}"
114 [ "${ftype}" == "invalid" ] && return 0
115 [ "${location}" == "${srcdir}" ] && return 0
117 case "${ftype}" in
118 "file")
119 str="${ftype} ${name} ${location} ${str}"
120 ;;
121 "nod")
122 local dev_type=
123 local maj=$(LC_ALL=C ls -l "${location}" | \
124 gawk '{sub(/,/, "", $5); print $5}')
125 local min=$(LC_ALL=C ls -l "${location}" | \
126 gawk '{print $6}')
128 if [ -b "${location}" ]; then
129 dev_type="b"
130 else
131 dev_type="c"
132 fi
133 str="${ftype} ${name} ${str} ${dev_type} ${maj} ${min}"
134 ;;
135 "slink")
136 local target=$(LC_ALL=C ls -l "${location}" | \
137 gawk '{print $11}')
138 str="${ftype} ${name} ${target} ${str}"
139 ;;
140 *)
141 str="${ftype} ${name} ${str}"
142 ;;
143 esac
145 echo "${str}" >> ${output}
147 return 0
148 }
150 unknown_option() {
151 printf "ERROR: unknown option \"$arg\"\n" >&2
152 printf "If the filename validly begins with '-', " >&2
153 printf "then it must be prefixed\n" >&2
154 printf "by './' so that it won't be interpreted as an option." >&2
155 printf "\n" >&2
156 usage >&2
157 exit 1
158 }
160 list_header() {
161 echo "deps_initramfs := \\"
162 }
164 header() {
165 printf "\n#####################\n# $1\n" >> ${output}
166 }
168 # process one directory (incl sub-directories)
169 dir_filelist() {
170 ${dep_list}header "$1"
172 srcdir=$(echo "$1" | sed -e 's://*:/:g')
173 dirlist=$(find "${srcdir}" -printf "%p %m %U %G\n" 2>/dev/null)
175 # If $dirlist is only one line, then the directory is empty
176 if [ "$(echo "${dirlist}" | wc -l)" -gt 1 ]; then
177 ${dep_list}print_mtime "$1"
179 echo "${dirlist}" | \
180 while read x; do
181 ${dep_list}parse ${x}
182 done
183 fi
184 }
186 # if only one file is specified and it is .cpio file then use it direct as fs
187 # if a directory is specified then add all files in given direcotry to fs
188 # if a regular file is specified assume it is in gen_initramfs format
189 input_file() {
190 source="$1"
191 if [ -f "$1" ]; then
192 ${dep_list}header "$1"
193 is_cpio="$(echo "$1" | sed 's/^.*\.cpio/cpio/')"
194 if [ $2 -eq 0 -a ${is_cpio} == "cpio" ]; then
195 cpio_file=$1
196 [ ! -z ${dep_list} ] && echo "$1"
197 return 0
198 fi
199 if [ -z ${dep_list} ]; then
200 print_mtime "$1" >> ${output}
201 cat "$1" >> ${output}
202 else
203 cat "$1" | while read type dir file perm ; do
204 if [ "$type" == "file" ]; then
205 echo "$file \\";
206 fi
207 done
208 fi
209 elif [ -d "$1" ]; then
210 dir_filelist "$1"
211 else
212 echo " ${prog}: Cannot open '$1'" >&2
213 exit 1
214 fi
215 }
217 prog=$0
218 root_uid=0
219 root_gid=0
220 dep_list=
221 cpio_file=
222 cpio_list=
223 output="/dev/stdout"
224 output_file=""
226 arg="$1"
227 case "$arg" in
228 "-l") # files included in initramfs - used by kbuild
229 dep_list="list_"
230 shift
231 ;;
232 "-o") # generate gzipped cpio image named $1
233 shift
234 output_file="$1"
235 cpio_list="$(mktemp ${TMPDIR:-/tmp}/cpiolist.XXXXXX)"
236 output=${cpio_list}
237 shift
238 ;;
239 esac
240 while [ $# -gt 0 ]; do
241 arg="$1"
242 shift
243 case "$arg" in
244 "-u") # map $1 to uid=0 (root)
245 root_uid="$1"
246 shift
247 ;;
248 "-g") # map $1 to gid=0 (root)
249 root_gid="$1"
250 shift
251 ;;
252 "-d") # display default initramfs list
253 default_list="$arg"
254 ${dep_list}default_initramfs
255 ;;
256 "-h")
257 usage
258 exit 0
259 ;;
260 *)
261 case "$arg" in
262 "-"*)
263 unknown_option
264 ;;
265 *) # input file/dir - process it
266 input_file "$arg" "$#"
267 ;;
268 esac
269 ;;
270 esac
271 done
273 # If output_file is set we will generate cpio archive and gzip it
274 # we are carefull to delete tmp files
275 if [ ! -z ${output_file} ]; then
276 if [ -z ${cpio_file} ]; then
277 cpio_tfile="$(mktemp ${TMPDIR:-/tmp}/cpiofile.XXXXXX)"
278 usr/gen_init_cpio ${cpio_list} > ${cpio_tfile}
279 else
280 cpio_tfile=${cpio_file}
281 fi
282 rm ${cpio_list}
283 cat ${cpio_tfile} | gzip -f -9 - > ${output_file}
284 [ -z ${cpio_file} ] && rm ${cpio_tfile}
285 fi
286 exit 0