linux sk_buff resources


 
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Operating Systems Linux linux sk_buff resources
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Old 01-17-2008
linux sk_buff resources

Hi,

I'm trying to build linear sk_buffs, non linear sk_buffs with page frames (nr_frags) and non linear skbuffs with linked list (frag_list) for testing of a kernel module I wrote. Does anyone have any better resources than the API for doing this? Like a guide type thing. The best I've found so far is:

How SKBs work

but that doesn't really go deep enough. I'm not worried about filling the skbuff with any data, just building the actual memory object to a certain size with a certain number of frags attached.

Any help is greatly appreciated,
Best Regards,
Brendan
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LINUX(4)                                                   BSD Kernel Interfaces Manual                                                   LINUX(4)

NAME
linux -- Linux ABI support SYNOPSIS
To compile support for this ABI into an i386 kernel place the following line in your kernel configuration file: options COMPAT_LINUX for an amd64 kernel use: options COMPAT_LINUX32 Alternatively, to load the ABI as a module at boot time, place the following line in loader.conf(5): linux_load="YES" DESCRIPTION
The linux module provides limited Linux ABI (application binary interface) compatibility for userland applications. The module provides the following significant facilities: o An image activator for correctly branded elf(5) executable images o Special signal handling for activated images o Linux to native system call translation It is important to note that the Linux ABI support it not provided through an emulator. Rather, a true (albeit limited) ABI implementation is provided. The following sysctl(8) tunable variables are available: compat.linux.osname Linux kernel operating system name. compat.linux.osrelease Linux kernel operating system release. Changing this to something else is discouraged on non-development systems, because it may change the way Linux programs work. Recent versions of GNU libc are known to use different syscalls depending on the value of this sysctl. compat.linux.oss_version Linux Open Sound System version. The linux module can be linked into the kernel statically with the COMPAT_LINUX kernel configuration option or loaded as required. The fol- lowing command will load the module if it is neither linked into the kernel nor already loaded as a module: if ! kldstat -v | grep -E 'linux(aout|elf)' > /dev/null; then kldload linux > /dev/null 2>&1 fi Note that dynamically linked Linux executables will require a suitable environment in /compat/linux. Specifically, the Linux run-time linker's hints files should be correctly initialized. For this reason, it is common to execute the following commands to prepare the system to correctly run Linux executables: if [ -x /compat/linux/sbin/ldconfig ]; then /compat/linux/sbin/ldconfig -r /compat/linux fi For information on loading the linux kernel loadable module automatically on system startup, see rc.conf(5). This information applies regardless of whether the linux module is statically linked into the kernel or loaded as a module. FILES
/compat/linux minimal Linux run-time environment /compat/linux/proc limited Linux process file system /compat/linux/sys limited Linux system file system SEE ALSO
brandelf(1), elf(5), linprocfs(5), linsysfs(5) HISTORY
Linux ABI support first appeared in FreeBSD 2.1. BSD February 8, 2010 BSD