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AF_XDP: add xsk.{c,h} to Makefile and fix build

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This patch makes sure we build AF_XDP-related code as part of libbpf. This
also required copying few uapi/linux headers and adding few used definitions
in include headers.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
This commit is contained in:
Andrii Nakryiko
2019-03-04 20:56:19 -08:00
committed by Andrii Nakryiko
parent 7a431904c8
commit cb658e9724
8 changed files with 208 additions and 35 deletions
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35
include/linux/ring_buffer.h
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@@ -2,40 +2,7 @@
#ifndef _TOOLS_LINUX_RING_BUFFER_H_
#define _TOOLS_LINUX_RING_BUFFER_H_
#define READ_ONCE(x) (*(volatile typeof(x) *)&x)
#define WRITE_ONCE(x, v) (*(volatile typeof(x) *)&x) = (v)
#define barrier() asm volatile("" ::: "memory")
#if defined(__x86_64__)
# define smp_store_release(p, v) \
do { \
barrier(); \
WRITE_ONCE(*p, v); \
} while (0)
# define smp_load_acquire(p) \
({ \
typeof(*p) ___p = READ_ONCE(*p); \
barrier(); \
___p; \
})
#else
# define smp_mb() __sync_synchronize()
# define smp_store_release(p, v) \
do { \
smp_mb(); \
WRITE_ONCE(*p, v); \
} while (0)
# define smp_load_acquire(p) \
({ \
typeof(*p) ___p = READ_ONCE(*p); \
smp_mb(); \
___p; \
})
#endif /* defined(__x86_64__) */
#include <linux/compiler.h>
static inline __u64 ring_buffer_read_head(struct perf_event_mmap_page *base)
{