[dpdk-dev] Compiling RSS ebpf
Ophir Munk
ophirmu at mellanox.com
Tue May 29 17:48:10 CEST 2018
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 at daynix.com]
Sent: Friday, May 25, 2018 11:54 AM
To: dev at dpdk.org; Ophir Munk <ophirmu at mellanox.com>
Cc: Yan Vugenfirer <yan at daynix.com>
Subject: Re: Compiling RSS ebpf
Ping.
On Sun, May 13, 2018 at 1:16 PM, Sameeh Jubran <sameeh at daynix.com<mailto:sameeh at 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 at daynix.com<mailto:sameeh at 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 at 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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