Do a "make prepare" on the target kernel first before building the external kernel module. I had the same problem and I made it work with make prepare. Manish Katiyar wrote: > > On Sat, Jun 14, 2008 at 5:36 AM, Veda Tripathi <veda.trips@xxxxxxxxx> > wrote: >> Hi all, >> I am trying to add parity to Linux ext3 file system.The design is I am >> using >> one direct pointer of the inode structure to store the parity of the >> whole >> file. For that I have edited 2 files namely "ext3_fs.h" and "inode.c" in >> the >> ext3 FS.I have added some wrapper functions and written some additional >> functions. Now I want to implement this system as a loadable kernel >> module. >> Now when I am trying to build this module, the building process is >> failing.Following is the dump that I am getting. >> >> 1) first command >> >> make -C /usr/src/linux-2.6.22.5 M=`pwd` modules >> make: Entering directory `/usr/src/linux-2.6.22.5' >> Building modules, stage 2. >> MODPOST 0 modules >> make: Leaving directory `/usr/src/linux-2.6.22.5' >> >> 2)second command >> >> make -C /lib/modules/$(uname -r)/build M=`pwd` modules >> make: Entering directory `/usr/src/linux-2.6.22.5' >> Building modules, stage 2. >> MODPOST 0 modules >> make: Leaving directory `/usr/src/linux-2.6.22.5' >> >> You see both commands are failing. I am running 2.6.22.5 source kernel . >> I >> am trying to build with 2.6.22.5 source tree which has been configured >> and >> built previously. >> >> Please comment on this dump what could be the problem? >> >> After that following things have to be done >> >> 1) inserting the module in the kernel >> 2) creating and mounting the modified file system >> 3) verification and testing >> >> The next problem is I have no idea about the above step 2. I know how to >> create ext3 in a file and mount it (loopback device method)but how to >> mount >> this modified ext3? > > As specified earlier, your makefile is wrong. Your modified ext3 would > work the same way as other ext3 module. > Since you are only utilising one of the direct block pointers, it > should not be a problem. > >> In step 3 I need to know how to access file system blocks in user >> level?Is >> there any user level command for it? > > "debugfs" which comes with e2fsprogs will help you to some extent. But > since you have modified the file layout you may need to modify it too > to make it work 100% for you. > > > > >> >> Please have a look at my queries.I'll be highly obliged. >> >> Thanx and regards, >> Veda >> > > > > -- > Thanks & Regards, > ******************************************** > Manish Katiyar ( http://mkatiyar.googlepages.com ) > 3rd Floor, Fair Winds Block > EGL Software Park > Off Intermediate Ring Road > Bangalore 560071, India > *********************************************** > > -- > To unsubscribe from this list: send an email with > "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx > Please read the FAQ at http://kernelnewbies.org/FAQ > > > -- View this message in context: http://www.nabble.com/Modifying-ext3-tp17834209p18353911.html Sent from the kernelnewbies mailing list archive at Nabble.com. -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
