On Fri, Jul 11, 2014 at 05:20:42PM +0000, Zhou, Danny wrote:
> Looks like you used a pretty new kernel version with new socket options that
> old kernel like my 3.12 does not support. When I tried this patch, it just
> cannot build, and compiler complains like below. Which Linux distribution
> does this patch work for? How to ensure it works for old kernels?
>
> /home/danny/dpdk.org/dpdk/lib/librte_pmd_packet/rte_eth_packet.c: In function
> rte_pmd_init_internals:
> /home/danny/dpdk.org/dpdk/lib/librte_pmd_packet/rte_eth_packet.c:524:17:
> error: PACKET_FANOUT_FLAG_ROLLOVER undeclared (first use in this function)
> /home/danny/dpdk.org/dpdk/lib/librte_pmd_packet/rte_eth_packet.c:524:17:
> note: each undeclared identifier is reported only once for each function it
> appears in
> /home/danny/dpdk.org/dpdk/lib/librte_pmd_packet/rte_eth_packet.c:557:33:
> error: PACKET_QDISC_BYPASS undeclared (first use in this function)
Both of them are isolated, so for playing with it you could just
comment those out. It looks like PACKET_FANOUT_FLAG_ROLLOVER should
have been in 3.10, while PACKET_QDISC_BYPASS didn't show-up until
3.14...
/home/linville/git/linux
[linville-x1.hq.tuxdriver.com]:> git annotate include/uapi/linux/if_packet.h |
grep PACKET_FANOUT_FLAG_ROLLOVER
77f65ebdca506 (Willem de Bruijn 2013-03-19 10:18:11 +0000
64)#define PACKET_FANOUT_FLAG_ROLLOVER 0x1000
/home/linville/git/linux
[linville-x1.hq.tuxdriver.com]:> git show -s --format=short 77f65ebdca506
commit 77f65ebdca506870d99bfabe52bde222511022ec
Author: Willem de Bruijn <willemb at google.com>
packet: packet fanout rollover during socket overload
/home/linville/git/linux
[linville-x1.hq.tuxdriver.com]:> git describe --contains 77f65ebdca506
v3.10-rc1~66^2~423
/home/linville/git/linux
[linville-x1.hq.tuxdriver.com]:> git annotate include/uapi/linux/if_packet.h |
grep PACKET_QDISC_BYPASS
d346a3fae3ff1 (Daniel Borkmann 2013-12-06 11:36:17 +0100
56)#define PACKET_QDISC_BYPASS 20
/home/linville/git/linux
[linville-x1.hq.tuxdriver.com]:> git show -s --format=short d346a3fae3ff1
commit d346a3fae3ff1d99f5d0c819bf86edf9094a26a1
Author: Daniel Borkmann <dborkman at redhat.com>
packet: introduce PACKET_QDISC_BYPASS socket option
/home/linville/git/linux
[linville-x1.hq.tuxdriver.com]:> git describe --contains d346a3fae3ff1
v3.14-rc1~94^2~564
Is there an example of code in DPDK that requires specific kernel
versions? What is the preferred method for coding such dependencies?
John
--
John W. Linville Someday the world will need a hero, and you
linville at tuxdriver.com might be all we have. Be ready.
