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net/tap: use local eBPF definitions

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eBPF has a graceful approach: it must successfully compile on all Linux
distributions. If a specific kernel cannot support eBPF it will gracefully
refuse the eBPF netlink message sent to it.
The kernel header file linux/bpf.h (if present) on different Linux
distributions may not include all definitions required for TAP
compilation.
In order to guarantee a successful eBPF compilation everywhere all the
required definitions for TAP have been locally added instead of including
file <linux/bpf.h>

Signed-off-by: Ophir Munk <ophirmu@mellanox.com>
Tested-by: Harry van Haaren <harry.van.haaren@intel.com>
This commit is contained in:
Ophir Munk 2018-01-23 21:54:09 +00:00 committed by Thomas Monjalon
parent e865cb4d1c
commit e011bad02d
2 changed files with 5 additions and 9 deletions
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5
drivers/net/tap/Makefile
View File

@ -82,11 +82,6 @@ tap_autoconf.h.new: $(RTE_SDK)/buildtools/auto-config-h.sh
linux/tc_act/tc_bpf.h \
enum TCA_ACT_BPF_FD \
$(AUTOCONF_OUTPUT)
$Q sh -- '$<' '$@' \
HAVE_BPF_PROG_LOAD \
linux/bpf.h \
enum BPF_PROG_LOAD \
$(AUTOCONF_OUTPUT)
# Create tap_autoconf.h or update it in case it differs from the new one.

9
drivers/net/tap/tap_bpf.h
View File

@ -7,9 +7,11 @@
#include <tap_autoconf.h>
#ifdef HAVE_BPF_PROG_LOAD
#include <linux/bpf.h>
#else
/* Do not #include <linux/bpf.h> since eBPF must compile on different
* distros which may include partial definitions for eBPF (while the
* kernel itself may support eBPF). Instead define here all that is needed
*/
/* BPF_MAP_UPDATE_ELEM command flags */
#define BPF_ANY 0 /* create a new element or update an existing */
@ -83,7 +85,6 @@ union bpf_attr {
__u32 prog_flags;
};
} __attribute__((aligned(8)));
#endif
#ifndef __NR_bpf
# if defined(__i386__)