A flow path for ethernet kernel driver

[Airton Ishimori]

Thank you both Nick and Rami. You helped me a lot !


*--*Airton Ishimori



On Mon, May 18, 2015 at 5:01 PM, Rami Rosen <roszenrami at gmail.com> wrote:

> Hi, Airton,
>
> This is simply a matter of setting dmesg to work with
> the level which you need in your setup.
> You should set "dmesg -n" to work with the pr_info() level.
> Pleas look in man dmesg, for the "-n, --console-level level" part.
>
> If you are in a haste and looking for immediate solution, you can also
> try pr_err() instead, as most distros do print such messages with
> dmesg without need for any special setup.
>
> Regards,
> Rami Rosen
> http://ramirose.wix.com/ramirosen
>
> On 18 May 2015 at 22:23, Airton Ishimori <nobumasa.bcc at gmail.com> wrote:
> > Hello, everybody,
> >
> > I'm trying to develop a new Ethernet driver (Realtek) for Linux kernel
> > 4.0.2.
> >
> > [    3.612938] r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded
> >
> > As part of my studies, I'm trying to trace the path for functions
> defined in
> > drivers/net/ethernet/realtek/r8169.c, net/core/dev.c and
> > net/core/dev_ioctl.c. I'm using "printks" for this purpose. For instance,
> > something like:
> >
> > printk("TEST: __dev_set_promiscuity\n");
> >
> > However, I'm not getting what's going on. I can set/unset the promiscuity
> > behaviour via ifconfig command.
> >
> > [  131.330091] device eth0 entered promiscuous mode
> > [  170.619086] device eth0 left promiscuous mode
> >
> > By looking at the dmesg output above, I thought the function that deals
> with
> > promiscuity was __dev_set_promiscuity() defined in net/core/dev.c,
> because
> > this function calls a function to print the message above:
> >
> > pr_info("device %s %s promiscuous mode\n", dev->name, dev->flags &
> > IFF_PROMISC ? "entered" : "left");
> >
> > But, when I tried to look for my printk message with dmesg after
> compiling
> > and running the kernel, I couldn't find it.
> >
> > $ cd linux-4.0.2/
> > $ make net && make modules
> > $ sudo make modules_install && sudo make install
> >
> > Can somebody help me to understand what's happening?
> >
> > Thanks in advance,
> >
> > --
> > Airton Ishimori
> >
> >
> > _______________________________________________
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> >
>
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