Building a kernel RPM with applying a patch

barisdemiray · 08-04-2004, 02:09 AM

Hi, i'm trying to build an kernel rpm with applying a netfilter patch (time extension). Firstly I simply add a Patch entry into the spec file and then build and install it, then recompile the iptables package; but the iptables' ipt_time.o file (in /lib/modules/`uname -r`/kernel/net/ipv4/netfilter) isn't created. I get "No target/match/chain by that name" error when i try to use time match. When i look at the Makefile in linux-2.4.20/net/ipv4/netfilter directory i see that all of the iptables match module files ipt_*.o has an entry but there is no ipt_time.o entry. Then i added the line

Code:

obj-$(CONFIG_IP_NF_MATCH_TIME) += ipt_time.o

to the Makefile and used the script below in the spec file just before %build file to add required lines to autoconf.h and .config files (I shortcut the rpm build to make it start from build step for not to lost changes i made)

Code:

echo -e "\aadding CONFIG_IP_NF_MATCH_TIME to .config files.."
sleep 5
# mbaris -- 270704 -- netfilter time patch configuration
# add constant to .config file
for file in configs/*.config; do
  if echo $file | grep -v BOOT > /dev/null; then
    cat >> $file << EOF
CONFIG_IP_NF_MATCH_TIME=m
EOF
  else
    cat >> $file << EOF
# CONFIG_IP_NF_MATCH_TIME is not set
EOF
  fi
done


echo -e "\aadding CONFIG_IP_NF_MATCH_TIME to autoconf.h file.."
sleep 5
# mbaris -- 030804 -- netfilter time patch configuration
# add constant to autoconf.h
cat >> ./include/linux/autoconf.h << EOF
#define CONFIG_IP_NF_MATCH_TIME_MODULE 1
EOF

(The reason i added these into these files is that: When i do a `make menuconfig' and check the files that have changed in 5 or less minutes in kernel source; find command gives me the autoconf.h file.)

There is still no ipt_time.o file and corresponding match in iptables. Should i change the Config.in files also? What i am doing wrong? Thanks.

barisdemiray · 08-04-2004, 06:50 AM

Problem solved and replying myself for archives :-)

Firstly, i used path-o-matic (thanks Rusty) for appyling patches. There is no need to dive into patch and Config.in files (as i've done enough :-)). Then the problem is this: even if you apply some patches to source tree, all of changes will be lost in rpm build process' setup directive part. Because %setup directive extracts to several shell script lines and these do remove the current source tree and extract the package to same space instead. To overcome this i used the -D (do not delete source directory before unpacking) and -T (do not perform default archive unpacking) options and thus i could save the changes. But, as you know, when we apply a netfilter extension patch, we need to select them as module or compile them into kernel.. So i do a make menuconfig and at last i added the corresponding constant to .config files in configs directory with the script below:

Code:

echo -e "\aadding CONFIG_IP_NF_MATCH_TIME to .config files.."
sleep 5
# mbaris -- 270704 -- netfilter time patch configuration
# add constant to .config file
for file in configs/*.config; do
  if echo $file | grep -v BOOT > /dev/null; then
    cat >> $file << EOF
CONFIG_IP_NF_MATCH_TIME=m
EOF
  else
    cat >> $file << EOF
# CONFIG_IP_NF_MATCH_TIME is not set
EOF
  fi
done

Then, when you recompile your iptables package (or install it's rpm) you will be able to use time extension.