Hi Sameeh,
RSS ebpf source code compilation is planned for dpdk next releases.

In order to compile the current tap_bpf_program.c code you will need definitions found in iproute2:

https://git.kernel.org/pub/scm/network/iproute2/iproute2.git/


1.       Please clone iproute2 tree and make it accessible to your build environment, say under directory <iproute2_root_tree>.



2.       Please add "bpf_api.h" file inclusion in tap_bpf_program.c (following tap_rss.h inclusion, see [1])



3.       When running the clang command please include the iproute2 include directory, for example,

clang -I <iproute2_root_tree>/iproute2/include -O2 -emit-llvm -c tap_bpf_program.c -o - | llc -march=bpf -filetype=obj -o tap_bpf_program.o

That’s all is needed.

[1]
-------------------------------------------------------------------------------------------------------

diff --git a/drivers/net/tap/tap_bpf_program.c b/drivers/net/tap/tap_bpf_program.c
index 1cb7382..d65f9b8 100644
--- a/drivers/net/tap/tap_bpf_program.c
+++ b/drivers/net/tap/tap_bpf_program.c

@@ -17,6 +17,7 @@

#include <linux/bpf.h>

  #include "tap_rss.h"
  +#include "bpf_api.h"

   /** Create IPv4 address */
    #define IPv4(a, b, c, d) ((__u32)(((a) & 0xff) << 24) | \
-------------------------------------------------------------------------------------------------------

Regards,
Ophir

From: Sameeh Jubran [mailto:sameeh@daynix.com]
Sent: Friday, May 25, 2018 11:54 AM
To: dev@dpdk.org; Ophir Munk <redacted>
Cc: Yan Vugenfirer <redacted>
Subject: Re: Compiling RSS ebpf

Ping.

On Sun, May 13, 2018 at 1:16 PM, Sameeh Jubran <sameeh@daynix.com<mailto:sameeh@daynix.com>> wrote:
Sorry I have accidentally sent my last email without finishing it.

I believe it is due misconfiguration of the linux headers and their inclusion. Anyone else faced these errors?


On Sun, May 13, 2018 at 1:10 PM, Sameeh Jubran <sameeh@daynix.com<mailto:sameeh@daynix.com>> wrote:
Hi All,

I am attempting to compile the rss epbf program dpdk and I am getting too much compilation errors, is there anything specific that I need to configure when compiling?

I am running the following line:

 clang -O2 -emit-llvm -c tap_bpf_program.c -o - | llc -march=bpf -filetype=obj -o tap_bpf_program.o

I think it is due to some misconfiguration of
The errors I am getting:

tap_bpf_program.c:157:37: warning: implicit declaration of function 'offsetof' is invalid in C99 [-Wimplicit-function-declaration]
                __u8 *src_dst_addr = data + off + offsetof(struct iphdr, saddr);
                                                  ^
tap_bpf_program.c:157:46: error: expected expression
                __u8 *src_dst_addr = data + off + offsetof(struct iphdr, saddr);
                                                           ^
tap_bpf_program.c:157:60: error: use of undeclared identifier 'saddr'
                __u8 *src_dst_addr = data + off + offsetof(struct iphdr, saddr);
                                                                         ^
tap_bpf_program.c:180:11: error: use of undeclared identifier 'TC_ACT_OK'
                        return TC_ACT_OK;
                               ^
tap_bpf_program.c:182:15: error: expected expression
                                        offsetof(struct ipv6hdr, saddr);
                                                 ^
tap_bpf_program.c:182:31: error: use of undeclared identifier 'saddr'
                                        offsetof(struct ipv6hdr, saddr);
                                                                 ^
tap_bpf_program.c:204:10: error: use of undeclared identifier 'TC_ACT_PIPE'
                return TC_ACT_PIPE;
                       ^
tap_bpf_program.c:212:9: error: use of undeclared identifier 'TC_ACT_RECLASSIFY'
        return TC_ACT_RECLASSIFY;
               ^
tap_bpf_program.c:222:1: error: expected parameter declarator
RSS(l3_l4)
^
tap_bpf_program.c:216:12: note: expanded from macro 'RSS'
        __section(#L) int                               \
                  ^
<scratch space>:76:1: note: expanded from here
"l3_l4"
^
tap_bpf_program.c:222:1: error: expected ')'
tap_bpf_program.c:216:12: note: expanded from macro 'RSS'
        __section(#L) int                               \
                  ^
<scratch space>:76:1: note: expanded from here
"l3_l4"
^
tap_bpf_program.c:222:1: note: to match this '('
tap_bpf_program.c:216:11: note: expanded from macro 'RSS'
        __section(#L) int                               \
                 ^
tap_bpf_program.c:222:1: warning: type specifier missing, defaults to 'int' [-Wimplicit-int]
RSS(l3_l4)
^
tap_bpf_program.c:216:2: note: expanded from macro 'RSS'
        __section(#L) int                               \
        ^
tap_bpf_program.c:222:1: error: expected ';' after top level declarator
tap_bpf_program.c:216:16: note: expanded from macro 'RSS'
        __section(#L) int                               \
                      ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
6 warnings and 20 errors generated.
sameeh@bark:~/Builds/bpf_rss/dpdk/drivers/net/tap$ clear

--
Respectfully,
Sameeh Jubran
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Respectfully,
Sameeh Jubran
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--
Respectfully,
Sameeh Jubran
Linkedin<https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fil.linkedin.com%2Fpub%2Fsameeh-jubran%2F87%2F747%2Fa8a&data=02%7C01%7Cophirmu%40mellanox.com%7Ce218efbbd4794adad85308d5c21d0017%7Ca652971c7d2e4d9ba6a4d149256f461b%7C0%7C0%7C636628352172399649&sdata=QWu2yfldJjjq3P0S2V3WAk9TUbJebFEAJN%2F14s1IUHs%3D&reserved=0>
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