Cannot load mymodule_lin.ko

[Linerd]

mymodule_lin: Unknown symbol netmap_bdg_ctl (err 0)
mymodule_lin: Unknown symbol netmap_bdg_learning (err 0)

These are the errors printed by "dmesg | tail"

I downloaded this repo, and in "mymodule/LINUX" I typed:
make KSRC=/usr/src/linux-headers-XXX NSRC=/home/XXX/netmap
or
make KSRC=/usr/src/linux-sources-XXX NSRC=/home/XXX/netmap

neither worked

[vmaffione]

I'm not the author of the VALE tutorial part, but here it seems you haven't loaded the netmap module.

[Linerd]

Actually I loaded it, I was able to perform all other netmap related tests

…

On Fri, Feb 2, 2018 at 11:31 AM Vincenzo Maffione ***@***.***> wrote: I'm not the author of the VALE tutorial part, but here it seems you haven't loaded the netmap module. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#3 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AHVEvMFHpSGvgM_KcojJmoAWzE9ePfNcks5tQyUEgaJpZM4R2Yor> .

[vmaffione]

You could grep the symbol to check it's there

 $ grep netmap_bdg_ /proc/kallsyms

[Linerd]

it's there, please see the make output:

make NSRC=/home/yikai/netmap KSRC=/usr/src/linux-headers-4.4.0-103-generic/
make -C /usr/src/linux-headers-4.4.0-103-generic/ M=/home/yikai/netmap-tutorial/mymodule/LINUX
CONFIG_NETMAP=m CONFIG_NETMAP_VALE=y CONFIG_MYMODULE=m
EXTRA_CFLAGS='-I/home/yikai/netmap/ -I/home/yikai/netmap/LINUX -I/home/yikai/netmap/sys -I/home/yikai/netmap-tutorial/mymodule/LINUX/../sys -DCONFIG_NETMAP' KBUILD_EXTRA_SYMBOLS=/home/yikai/netmap/Module.symvers
make[1]: Entering directory '/usr/src/linux-headers-4.4.0-103-generic'
LD /home/yikai/netmap-tutorial/mymodule/LINUX/built-in.o
CC [M] /home/yikai/netmap-tutorial/mymodule/LINUX/mymodule.o
LD [M] /home/yikai/netmap-tutorial/mymodule/LINUX/mymodule_lin.o
Building modules, stage 2.
MODPOST 1 modules
WARNING: could not find /home/yikai/netmap-tutorial/mymodule/LINUX/.mymodule.o.cmd for /home/yikai/netmap-tutorial/mymodule/LINUX/mymodule.o
WARNING: "netmap_bdg_learning" [/home/yikai/netmap-tutorial/mymodule/LINUX/mymodule_lin.ko] undefined!
WARNING: "netmap_bdg_ctl" [/home/yikai/netmap-tutorial/mymodule/LINUX/mymodule_lin.ko] undefined!
CC /home/yikai/netmap-tutorial/mymodule/LINUX/mymodule_lin.mod.o
LD [M] /home/yikai/netmap-tutorial/mymodule/LINUX/mymodule_lin.ko
make[1]: Leaving directory '/usr/src/linux-headers-4.4.0-103-generic'
ls -l find . -name \*.ko
-rw-rw-r-- 1 yikai yikai 6296 Feb 2 13:35 ./mymodule_lin.ko

[Linerd]

and this is when I use linux-source instead of headers:

make NSRC=/home/yikai/netmap KSRC=/usr/src/linux-source-4.4.0
make -C /usr/src/linux-source-4.4.0 M=/home/yikai/netmap-tutorial/mymodule/LINUX
CONFIG_NETMAP=m CONFIG_NETMAP_VALE=y CONFIG_MYMODULE=m
EXTRA_CFLAGS='-I/home/yikai/netmap/ -I/home/yikai/netmap/LINUX -I/home/yikai/netmap/sys -I/home/yikai/netmap-tutorial/mymodule/LINUX/../sys -DCONFIG_NETMAP' KBUILD_EXTRA_SYMBOLS=/home/yikai/netmap/Module.symvers
make[1]: Entering directory '/usr/src/linux-source-4.4.0'

WARNING: Symbol version dump ./Module.symvers
is missing; modules will have no dependencies and modversions.

Building modules, stage 2.
MODPOST 1 modules
WARNING: could not find /home/yikai/netmap-tutorial/mymodule/LINUX/.mymodule.o.cmd for /home/yikai/netmap-tutorial/mymodule/LINUX/mymodule.o
make[1]: Leaving directory '/usr/src/linux-source-4.4.0'
ls -l find . -name \*.ko
-rw-rw-r-- 1 yikai yikai 65640 Feb 2 13:37 ./mymodule_lin.ko

[vmaffione]

Yeah, I'm not even able to compile, actually. Can you ask the author https://github.com/micchie/mymodule ?