scripts/generate-kernel-patch

   1 #!/bin/bash
   2
   3 ############################################################################
   4 #
   5 # Script for converting the SCST source tree as it exists in the Subversion
   6 # repository to a Linux kernel patch.
   7 #
   8 # Copyright (C) 2008 Bart Van Assche <bart.vanassche@gmail.com>
   9 #
  10 # This program is free software; you can redistribute it and/or
  11 # modify it under the terms of the GNU General Public License
  12 # as published by the Free Software Foundation, version 2
  13 # of the License.
  14 #
  15 # This program is distributed in the hope that it will be useful,
  16 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18 # GNU General Public License for more details.
  19 #
  20 ############################################################################
  21
  22 ########################
  23 # Function definitions #
  24 ########################
  25
  26 # Convert an existing patch.
  27 # $1: path of patch to be added.
  28 # $2: path in kernel tree of file to be patched.
  29 function add_patch {
  30   if [ ! -e "$1" ]; then
  31     echo "Error: could not find $1." >&2
  32     exit 1
  33   fi
  34
  35   sed -e "s:^--- [^ ]*:--- orig/linux-${kernel_version}/$2:" \
  36       -e "s:^+++ [^ ]*:+++ linux-${kernel_version}/$2:"      \
  37       < "$1"
  38 }
  39
  40 # Generate a patch for a file to be added to the kernel source tree, and strip
  41 # trailing whitespace from C source files while converting the file to patch
  42 # format.
  43 # $1: path of file to be added.
  44 # $2: path in kernel tree where file should be added.
  45 function add_file {
  46   local a b
  47
  48   if [ ! -e "$1" ]; then
  49     echo "Error: could not find $1." >&2
  50     exit 1
  51   fi
  52
  53   # Only include files that were not generated by the build process
  54   # -- skip *.mod.c.
  55   if [ "$1" = "${1%.mod.c}" -a "$1" ]; then
  56     cat <<EOF
  57 diff -uprN orig/linux-${kernel_version}/$2 linux-${kernel_version}/$2
  58 --- orig/linux-${kernel_version}/$2
  59 +++ linux-${kernel_version}/$2
  60 @@ -0,0 +1,$(wc -l "$1" | { read a b; echo $a; }) @@
  61 EOF
  62     if [ "${2%.[ch]}" != "$2" ]; then
  63       sed -e 's/^ \([^ ]*:\)$/\1/' -e 's/^/+/' < "$1"
  64     else
  65       sed -e 's/^/+/' < "$1"
  66     fi
  67   fi
  68 }
  69
  70
  71 #########################
  72 # Argument verification #
  73 #########################
  74
  75 if [ ! -e scst -o ! -e iscsi-scst -o ! -e srpt ]; then
  76   echo "Please run this script from inside the SCST subversion source tree."
  77   exit 1
  78 fi
  79
  80 if [ $# != 1 ]; then
  81   echo "Usage: $0 <kernel version>."
  82   exit 1
  83 fi
  84
  85
  86 ####################
  87 # Patch Generation #
  88 ####################
  89
  90 kernel_version="$1"
  91 kpatch=(                                                                \
  92   "scst/kernel/scst_exec_req_fifo-${kernel_version}.patch"              \
  93   "iscsi-scst/kernel/patches/put_page_callback-${kernel_version}.patch" \
  94 )
  95
  96 for p in "${kpatch[@]}"
  97 do
  98   if [ ! -e "$p" ]; then
  99     echo "Error: kernel version ${kernel_version} is not supported by SCST."
 100     echo "(could not find file $p)."
 101     exit 1
 102   fi >&2
 103 done
 104
 105
 106 # Redirect the output of all subsequent commands to the specialize-patch script
 107
 108 trap "rm -f ${fifo}" EXIT
 109 fifo=/tmp/generate-kernel-patch-fifo.$$
 110 rm -f "${fifo}"
 111 mkfifo "${fifo}"
 112 "$(dirname $0)/specialize-patch" -v kernel_version="${kernel_version}" \
 113   < "${fifo}" &
 114 exec >"${fifo}"
 115
 116 # General kernel patches.
 117
 118 cat "${kpatch[@]}"
 119
 120
 121 # Directory include/scst/
 122
 123 # Make sure the file iscsi-scst/iscsi_scst_itf_ver.h is up to date.
 124 make -s -C iscsi-scst include/iscsi_scst_itf_ver.h
 125
 126 for f in scst/include/*h
 127 do
 128   add_file "${f}" "include/scst/${f#scst/include/}"
 129 done
 130
 131 for f in iscsi-scst/include/*h
 132 do
 133   add_file "${f}" "include/scst/${f#iscsi-scst/include/}"
 134 done
 135
 136
 137 # Directory drivers/
 138
 139 add_patch "scst/kernel/in-tree/Kconfig.drivers.Linux-${kernel_version}.patch" \
 140           "drivers/Kconfig"
 141
 142 add_patch "scst/kernel/in-tree/Makefile.drivers.Linux-${kernel_version}.patch"\
 143           "drivers/Makefile"
 144
 145
 146 # Directory drivers/scst/
 147
 148 add_file "scst/kernel/in-tree/Kconfig.scst"  "drivers/scst/Kconfig"
 149
 150 add_file "scst/kernel/in-tree/Makefile.scst" "drivers/scst/Makefile"
 151
 152 add_file "scst/README"                       "Documentation/scst/README.scst"
 153
 154 for f in scst/src/*.[ch]
 155 do
 156   add_file "${f}" "drivers/scst/${f#scst/src/}"
 157 done
 158
 159
 160 # Directory drivers/scst/dev_handlers/
 161
 162 add_file "scst/kernel/in-tree/Makefile.dev_handlers" \
 163          "drivers/scst/dev_handlers/Makefile"
 164
 165 for f in scst/src/dev_handlers/*.[ch]
 166 do
 167   add_file "${f}" "drivers/scst/dev_handlers/${f#scst/src/dev_handlers/}"
 168 done
 169
 170
 171 # Directory drivers/scst/iscsi-scst/
 172
 173 add_file "iscsi-scst/kernel/Makefile.in-kernel" \
 174          "drivers/scst/iscsi-scst/Makefile"
 175
 176 add_file "iscsi-scst/kernel/Kconfig"  "drivers/scst/iscsi-scst/Kconfig"
 177
 178 add_file "iscsi-scst/README"          "Documentation/scst/README.iscsi"
 179
 180 for f in iscsi-scst/kernel/*.[ch]
 181 do
 182   add_file "${f}" "drivers/scst/iscsi-scst/${f#iscsi-scst/kernel/}"
 183 done
 184
 185
 186 # Directory drivers/scst/qla2x00-target/
 187
 188 if false; then
 189
 190 add_file "qla2x00t/qla2x00-target/Makefile.in-kernel" \
 191          "drivers/scst/qla2x00-target/Makefile"
 192
 193 add_file "qla2x00t/qla2x00-target/Kconfig" \
 194          "drivers/scst/qla2x00-target/Kconfig"
 195
 196 add_file "qla2x00t/qla2x_tgt_def.h" \
 197          "drivers/scst/qla2x00-target/qla2x_tgt_def.h"
 198
 199 add_file "qla2x00t/qla2x00-target/README" \
 200          "Documentation/scst/README.qla2x00t"
 201
 202 for f in qla2x00t/qla2x00-target/*.[ch]
 203 do
 204   add_file "${f}" "drivers/scst/qla2x00-target/${f#qla2x00t/qla2x00-target/}"
 205 done
 206
 207 fi
 208
 209
 210 # Directory drivers/infiniband/ulp/srpt/
 211
 212 add_patch "srpt/src/Kconfig.infiniband.Linux-${kernel_version}.patch" \
 213           "drivers/infiniband/Kconfig"
 214
 215 add_patch "srpt/src/Makefile.infiniband.Linux-${kernel_version}.patch" \
 216           "drivers/infiniband/Makefile"
 217
 218 add_file  "srpt/src/Kconfig"            "drivers/infiniband/ulp/srpt/Kconfig"
 219
 220 add_file  "srpt/src/Makefile.in_kernel" "drivers/infiniband/ulp/srpt/Makefile"
 221
 222 add_file  "srpt/README"                 "Documentation/scst/README.srpt"
 223
 224 for f in srpt/src/*.[ch]
 225 do
 226   add_file "${f}" "drivers/infiniband/ulp/srpt/${f#srpt/src/}"
 227 done