mirror of
https://github.com/torvalds/linux.git
synced 2024-11-23 12:42:02 +00:00
samples/bpf: Switch over to libbpf
Now that libbpf under tools/lib/bpf/* is synced with the version from
samples/bpf, we can get rid most of the libbpf library here.
Committer notes:
Built it in a docker fedora rawhide container and ran it in the f25 host, seems
to work just like it did before this patch, i.e. the switch to tools/lib/bpf/
doesn't seem to have introduced problems and Joe said he tested it with
all the entries in samples/bpf/ and other code he found:
[root@f5065a7d6272 linux]# make -j4 O=/tmp/build/linux headers_install
<SNIP>
[root@f5065a7d6272 linux]# rm -rf /tmp/build/linux/samples/bpf/
[root@f5065a7d6272 linux]# make -j4 O=/tmp/build/linux samples/bpf/
make[1]: Entering directory '/tmp/build/linux'
CHK include/config/kernel.release
HOSTCC scripts/basic/fixdep
GEN ./Makefile
CHK include/generated/uapi/linux/version.h
Using /git/linux as source for kernel
CHK include/generated/utsrelease.h
HOSTCC scripts/basic/bin2c
HOSTCC arch/x86/tools/relocs_32.o
HOSTCC arch/x86/tools/relocs_64.o
LD samples/bpf/built-in.o
<SNIP>
HOSTCC samples/bpf/fds_example.o
HOSTCC samples/bpf/sockex1_user.o
/git/linux/samples/bpf/fds_example.c: In function 'bpf_prog_create':
/git/linux/samples/bpf/fds_example.c:63:6: warning: passing argument 2 of 'bpf_load_program' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
insns, insns_cnt, "GPL", 0,
^~~~~
In file included from /git/linux/samples/bpf/libbpf.h:5:0,
from /git/linux/samples/bpf/bpf_load.h:4,
from /git/linux/samples/bpf/fds_example.c:15:
/git/linux/tools/lib/bpf/bpf.h:31:5: note: expected 'struct bpf_insn *' but argument is of type 'const struct bpf_insn *'
int bpf_load_program(enum bpf_prog_type type, struct bpf_insn *insns,
^~~~~~~~~~~~~~~~
HOSTCC samples/bpf/sockex2_user.o
<SNIP>
HOSTCC samples/bpf/xdp_tx_iptunnel_user.o
clang -nostdinc -isystem /usr/lib/gcc/x86_64-redhat-linux/6.2.1/include -I/git/linux/arch/x86/include -I./arch/x86/include/generated/uapi -I./arch/x86/include/generated -I/git/linux/include -I./include -I/git/linux/arch/x86/include/uapi -I/git/linux/include/uapi -I./include/generated/uapi -include /git/linux/include/linux/kconfig.h \
-D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \
-Wno-compare-distinct-pointer-types \
-Wno-gnu-variable-sized-type-not-at-end \
-Wno-address-of-packed-member -Wno-tautological-compare \
-O2 -emit-llvm -c /git/linux/samples/bpf/sockex1_kern.c -o -| llc -march=bpf -filetype=obj -o samples/bpf/sockex1_kern.o
HOSTLD samples/bpf/tc_l2_redirect
<SNIP>
HOSTLD samples/bpf/lwt_len_hist
HOSTLD samples/bpf/xdp_tx_iptunnel
make[1]: Leaving directory '/tmp/build/linux'
[root@f5065a7d6272 linux]#
And then, in the host:
[root@jouet bpf]# mount | grep "docker.*devicemapper\/"
/dev/mapper/docker-253:0-1705076-9bd8aa1e0af33adce89ff42090847868ca676932878942be53941a06ec5923f9 on /var/lib/docker/devicemapper/mnt/9bd8aa1e0af33adce89ff42090847868ca676932878942be53941a06ec5923f9 type xfs (rw,relatime,context="system_u:object_r:container_file_t:s0:c73,c276",nouuid,attr2,inode64,sunit=1024,swidth=1024,noquota)
[root@jouet bpf]# cd /var/lib/docker/devicemapper/mnt/9bd8aa1e0af33adce89ff42090847868ca676932878942be53941a06ec5923f9/rootfs/tmp/build/linux/samples/bpf/
[root@jouet bpf]# file offwaketime
offwaketime: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, BuildID[sha1]=f423d171e0487b2f802b6a792657f0f3c8f6d155, not stripped
[root@jouet bpf]# readelf -SW offwaketime
offwaketime offwaketime_kern.o offwaketime_user.o
[root@jouet bpf]# readelf -SW offwaketime_kern.o
There are 11 section headers, starting at offset 0x700:
Section Headers:
[Nr] Name Type Address Off Size ES Flg Lk Inf Al
[ 0] NULL 0000000000000000 000000 000000 00 0 0 0
[ 1] .strtab STRTAB 0000000000000000 000658 0000a8 00 0 0 1
[ 2] .text PROGBITS 0000000000000000 000040 000000 00 AX 0 0 4
[ 3] kprobe/try_to_wake_up PROGBITS 0000000000000000 000040 0000d8 00 AX 0 0 8
[ 4] .relkprobe/try_to_wake_up REL 0000000000000000 0005a8 000020 10 10 3 8
[ 5] tracepoint/sched/sched_switch PROGBITS 0000000000000000 000118 000318 00 AX 0 0 8
[ 6] .reltracepoint/sched/sched_switch REL 0000000000000000 0005c8 000090 10 10 5 8
[ 7] maps PROGBITS 0000000000000000 000430 000050 00 WA 0 0 4
[ 8] license PROGBITS 0000000000000000 000480 000004 00 WA 0 0 1
[ 9] version PROGBITS 0000000000000000 000484 000004 00 WA 0 0 4
[10] .symtab SYMTAB 0000000000000000 000488 000120 18 1 4 8
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings)
I (info), L (link order), G (group), T (TLS), E (exclude), x (unknown)
O (extra OS processing required) o (OS specific), p (processor specific)
[root@jouet bpf]# ./offwaketime | head -3
qemu-system-x86;entry_SYSCALL_64_fastpath;sys_ppoll;do_sys_poll;poll_schedule_timeout;schedule_hrtimeout_range;schedule_hrtimeout_range_clock;schedule;__schedule;-;try_to_wake_up;hrtimer_wakeup;__hrtimer_run_queues;hrtimer_interrupt;local_apic_timer_interrupt;smp_apic_timer_interrupt;__irqentry_text_start;cpuidle_enter_state;cpuidle_enter;call_cpuidle;cpu_startup_entry;rest_init;start_kernel;x86_64_start_reservations;x86_64_start_kernel;start_cpu;;swapper/0 4
firefox;entry_SYSCALL_64_fastpath;sys_poll;do_sys_poll;poll_schedule_timeout;schedule_hrtimeout_range;schedule_hrtimeout_range_clock;schedule;__schedule;-;try_to_wake_up;pollwake;__wake_up_common;__wake_up_sync_key;pipe_write;__vfs_write;vfs_write;sys_write;entry_SYSCALL_64_fastpath;;Timer 1
swapper/2;start_cpu;start_secondary;cpu_startup_entry;schedule_preempt_disabled;schedule;__schedule;-;---;; 61
[root@jouet bpf]#
Signed-off-by: Joe Stringer <joe@ovn.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Wang Nan <wangnan0@huawei.com>
Cc: netdev@vger.kernel.org
Link: 5c40f54a52.patch
Link: http://lkml.kernel.org/n/tip-xr8twtx7sjh5821g8qw47yxk@git.kernel.org
[ Use -I$(srctree)/tools/lib/ to support out of source code tree builds, as noticed by Wang Nan ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Joe Stringer
Arnaldo Carvalho de Melo
parent
ed6c166cc7
commit
43371c83f3
@ -35,40 +35,43 @@ hostprogs-y += tc_l2_redirect
|
||||
hostprogs-y += lwt_len_hist
|
||||
hostprogs-y += xdp_tx_iptunnel
|
||||
|
||||
test_lru_dist-objs := test_lru_dist.o libbpf.o
|
||||
sock_example-objs := sock_example.o libbpf.o
|
||||
fds_example-objs := bpf_load.o libbpf.o fds_example.o
|
||||
sockex1-objs := bpf_load.o libbpf.o sockex1_user.o
|
||||
sockex2-objs := bpf_load.o libbpf.o sockex2_user.o
|
||||
sockex3-objs := bpf_load.o libbpf.o sockex3_user.o
|
||||
tracex1-objs := bpf_load.o libbpf.o tracex1_user.o
|
||||
tracex2-objs := bpf_load.o libbpf.o tracex2_user.o
|
||||
tracex3-objs := bpf_load.o libbpf.o tracex3_user.o
|
||||
tracex4-objs := bpf_load.o libbpf.o tracex4_user.o
|
||||
tracex5-objs := bpf_load.o libbpf.o tracex5_user.o
|
||||
tracex6-objs := bpf_load.o libbpf.o tracex6_user.o
|
||||
test_probe_write_user-objs := bpf_load.o libbpf.o test_probe_write_user_user.o
|
||||
trace_output-objs := bpf_load.o libbpf.o trace_output_user.o
|
||||
lathist-objs := bpf_load.o libbpf.o lathist_user.o
|
||||
offwaketime-objs := bpf_load.o libbpf.o offwaketime_user.o
|
||||
spintest-objs := bpf_load.o libbpf.o spintest_user.o
|
||||
map_perf_test-objs := bpf_load.o libbpf.o map_perf_test_user.o
|
||||
test_overhead-objs := bpf_load.o libbpf.o test_overhead_user.o
|
||||
test_cgrp2_array_pin-objs := libbpf.o test_cgrp2_array_pin.o
|
||||
test_cgrp2_attach-objs := libbpf.o test_cgrp2_attach.o
|
||||
test_cgrp2_attach2-objs := libbpf.o test_cgrp2_attach2.o cgroup_helpers.o
|
||||
test_cgrp2_sock-objs := libbpf.o test_cgrp2_sock.o
|
||||
test_cgrp2_sock2-objs := bpf_load.o libbpf.o test_cgrp2_sock2.o
|
||||
xdp1-objs := bpf_load.o libbpf.o xdp1_user.o
|
||||
# Libbpf dependencies
|
||||
LIBBPF := libbpf.o ../../tools/lib/bpf/bpf.o
|
||||
|
||||
test_lru_dist-objs := test_lru_dist.o $(LIBBPF)
|
||||
sock_example-objs := sock_example.o $(LIBBPF)
|
||||
fds_example-objs := bpf_load.o $(LIBBPF) fds_example.o
|
||||
sockex1-objs := bpf_load.o $(LIBBPF) sockex1_user.o
|
||||
sockex2-objs := bpf_load.o $(LIBBPF) sockex2_user.o
|
||||
sockex3-objs := bpf_load.o $(LIBBPF) sockex3_user.o
|
||||
tracex1-objs := bpf_load.o $(LIBBPF) tracex1_user.o
|
||||
tracex2-objs := bpf_load.o $(LIBBPF) tracex2_user.o
|
||||
tracex3-objs := bpf_load.o $(LIBBPF) tracex3_user.o
|
||||
tracex4-objs := bpf_load.o $(LIBBPF) tracex4_user.o
|
||||
tracex5-objs := bpf_load.o $(LIBBPF) tracex5_user.o
|
||||
tracex6-objs := bpf_load.o $(LIBBPF) tracex6_user.o
|
||||
test_probe_write_user-objs := bpf_load.o $(LIBBPF) test_probe_write_user_user.o
|
||||
trace_output-objs := bpf_load.o $(LIBBPF) trace_output_user.o
|
||||
lathist-objs := bpf_load.o $(LIBBPF) lathist_user.o
|
||||
offwaketime-objs := bpf_load.o $(LIBBPF) offwaketime_user.o
|
||||
spintest-objs := bpf_load.o $(LIBBPF) spintest_user.o
|
||||
map_perf_test-objs := bpf_load.o $(LIBBPF) map_perf_test_user.o
|
||||
test_overhead-objs := bpf_load.o $(LIBBPF) test_overhead_user.o
|
||||
test_cgrp2_array_pin-objs := $(LIBBPF) test_cgrp2_array_pin.o
|
||||
test_cgrp2_attach-objs := $(LIBBPF) test_cgrp2_attach.o
|
||||
test_cgrp2_attach2-objs := $(LIBBPF) test_cgrp2_attach2.o cgroup_helpers.o
|
||||
test_cgrp2_sock-objs := $(LIBBPF) test_cgrp2_sock.o
|
||||
test_cgrp2_sock2-objs := bpf_load.o $(LIBBPF) test_cgrp2_sock2.o
|
||||
xdp1-objs := bpf_load.o $(LIBBPF) xdp1_user.o
|
||||
# reuse xdp1 source intentionally
|
||||
xdp2-objs := bpf_load.o libbpf.o xdp1_user.o
|
||||
test_current_task_under_cgroup-objs := bpf_load.o libbpf.o cgroup_helpers.o \
|
||||
xdp2-objs := bpf_load.o $(LIBBPF) xdp1_user.o
|
||||
test_current_task_under_cgroup-objs := bpf_load.o $(LIBBPF) cgroup_helpers.o \
|
||||
test_current_task_under_cgroup_user.o
|
||||
trace_event-objs := bpf_load.o libbpf.o trace_event_user.o
|
||||
sampleip-objs := bpf_load.o libbpf.o sampleip_user.o
|
||||
tc_l2_redirect-objs := bpf_load.o libbpf.o tc_l2_redirect_user.o
|
||||
lwt_len_hist-objs := bpf_load.o libbpf.o lwt_len_hist_user.o
|
||||
xdp_tx_iptunnel-objs := bpf_load.o libbpf.o xdp_tx_iptunnel_user.o
|
||||
trace_event-objs := bpf_load.o $(LIBBPF) trace_event_user.o
|
||||
sampleip-objs := bpf_load.o $(LIBBPF) sampleip_user.o
|
||||
tc_l2_redirect-objs := bpf_load.o $(LIBBPF) tc_l2_redirect_user.o
|
||||
lwt_len_hist-objs := bpf_load.o $(LIBBPF) lwt_len_hist_user.o
|
||||
xdp_tx_iptunnel-objs := bpf_load.o $(LIBBPF) xdp_tx_iptunnel_user.o
|
||||
|
||||
# Tell kbuild to always build the programs
|
||||
always := $(hostprogs-y)
|
||||
@ -104,6 +107,7 @@ always += lwt_len_hist_kern.o
|
||||
always += xdp_tx_iptunnel_kern.o
|
||||
|
||||
HOSTCFLAGS += -I$(objtree)/usr/include
|
||||
HOSTCFLAGS += -I$(srctree)/tools/lib/
|
||||
HOSTCFLAGS += -I$(srctree)/tools/testing/selftests/bpf/
|
||||
|
||||
HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable
|
||||
|
||||
@ -1,8 +1,8 @@
|
||||
eBPF sample programs
|
||||
====================
|
||||
|
||||
This directory contains a mini eBPF library, test stubs, verifier
|
||||
test-suite and examples for using eBPF.
|
||||
This directory contains a test stubs, verifier test-suite and examples
|
||||
for using eBPF. The examples use libbpf from tools/lib/bpf.
|
||||
|
||||
Build dependencies
|
||||
==================
|
||||
|
||||
@ -66,6 +66,7 @@ static int load_and_attach(const char *event, struct bpf_insn *prog, int size)
|
||||
bool is_perf_event = strncmp(event, "perf_event", 10) == 0;
|
||||
bool is_cgroup_skb = strncmp(event, "cgroup/skb", 10) == 0;
|
||||
bool is_cgroup_sk = strncmp(event, "cgroup/sock", 11) == 0;
|
||||
size_t insns_cnt = size / sizeof(struct bpf_insn);
|
||||
enum bpf_prog_type prog_type;
|
||||
char buf[256];
|
||||
int fd, efd, err, id;
|
||||
@ -95,7 +96,7 @@ static int load_and_attach(const char *event, struct bpf_insn *prog, int size)
|
||||
return -1;
|
||||
}
|
||||
|
||||
fd = bpf_load_program(prog_type, prog, size, license, kern_version,
|
||||
fd = bpf_load_program(prog_type, prog, insns_cnt, license, kern_version,
|
||||
bpf_log_buf, BPF_LOG_BUF_SIZE);
|
||||
if (fd < 0) {
|
||||
printf("bpf_load_program() err=%d\n%s", errno, bpf_log_buf);
|
||||
|
||||
@ -53,13 +53,14 @@ static int bpf_prog_create(const char *object)
|
||||
BPF_MOV64_IMM(BPF_REG_0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
};
|
||||
size_t insns_cnt = sizeof(insns) / sizeof(struct bpf_insn);
|
||||
|
||||
if (object) {
|
||||
assert(!load_bpf_file((char *)object));
|
||||
return prog_fd[0];
|
||||
} else {
|
||||
return bpf_load_program(BPF_PROG_TYPE_SOCKET_FILTER,
|
||||
insns, sizeof(insns), "GPL", 0,
|
||||
insns, insns_cnt, "GPL", 0,
|
||||
bpf_log_buf, BPF_LOG_BUF_SIZE);
|
||||
}
|
||||
}
|
||||
|
||||
@ -4,8 +4,6 @@
|
||||
#include <linux/unistd.h>
|
||||
#include <unistd.h>
|
||||
#include <string.h>
|
||||
#include <linux/netlink.h>
|
||||
#include <linux/bpf.h>
|
||||
#include <errno.h>
|
||||
#include <net/ethernet.h>
|
||||
#include <net/if.h>
|
||||
@ -13,96 +11,6 @@
|
||||
#include <arpa/inet.h>
|
||||
#include "libbpf.h"
|
||||
|
||||
static __u64 ptr_to_u64(void *ptr)
|
||||
{
|
||||
return (__u64) (unsigned long) ptr;
|
||||
}
|
||||
|
||||
int bpf_create_map(enum bpf_map_type map_type, int key_size, int value_size,
|
||||
int max_entries, int map_flags)
|
||||
{
|
||||
union bpf_attr attr = {
|
||||
.map_type = map_type,
|
||||
.key_size = key_size,
|
||||
.value_size = value_size,
|
||||
.max_entries = max_entries,
|
||||
.map_flags = map_flags,
|
||||
};
|
||||
|
||||
return syscall(__NR_bpf, BPF_MAP_CREATE, &attr, sizeof(attr));
|
||||
}
|
||||
|
||||
int bpf_map_update_elem(int fd, void *key, void *value, unsigned long long flags)
|
||||
{
|
||||
union bpf_attr attr = {
|
||||
.map_fd = fd,
|
||||
.key = ptr_to_u64(key),
|
||||
.value = ptr_to_u64(value),
|
||||
.flags = flags,
|
||||
};
|
||||
|
||||
return syscall(__NR_bpf, BPF_MAP_UPDATE_ELEM, &attr, sizeof(attr));
|
||||
}
|
||||
|
||||
int bpf_map_lookup_elem(int fd, void *key, void *value)
|
||||
{
|
||||
union bpf_attr attr = {
|
||||
.map_fd = fd,
|
||||
.key = ptr_to_u64(key),
|
||||
.value = ptr_to_u64(value),
|
||||
};
|
||||
|
||||
return syscall(__NR_bpf, BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr));
|
||||
}
|
||||
|
||||
int bpf_map_delete_elem(int fd, void *key)
|
||||
{
|
||||
union bpf_attr attr = {
|
||||
.map_fd = fd,
|
||||
.key = ptr_to_u64(key),
|
||||
};
|
||||
|
||||
return syscall(__NR_bpf, BPF_MAP_DELETE_ELEM, &attr, sizeof(attr));
|
||||
}
|
||||
|
||||
int bpf_map_get_next_key(int fd, void *key, void *next_key)
|
||||
{
|
||||
union bpf_attr attr = {
|
||||
.map_fd = fd,
|
||||
.key = ptr_to_u64(key),
|
||||
.next_key = ptr_to_u64(next_key),
|
||||
};
|
||||
|
||||
return syscall(__NR_bpf, BPF_MAP_GET_NEXT_KEY, &attr, sizeof(attr));
|
||||
}
|
||||
|
||||
#define ROUND_UP(x, n) (((x) + (n) - 1u) & ~((n) - 1u))
|
||||
|
||||
int bpf_load_program(enum bpf_prog_type prog_type,
|
||||
const struct bpf_insn *insns, int prog_len,
|
||||
const char *license, int kern_version,
|
||||
char *log_buf, size_t log_buf_sz)
|
||||
{
|
||||
union bpf_attr attr = {
|
||||
.prog_type = prog_type,
|
||||
.insns = ptr_to_u64((void *) insns),
|
||||
.insn_cnt = prog_len / sizeof(struct bpf_insn),
|
||||
.license = ptr_to_u64((void *) license),
|
||||
.log_buf = ptr_to_u64(log_buf),
|
||||
.log_size = log_buf_sz,
|
||||
.log_level = 1,
|
||||
};
|
||||
|
||||
/* assign one field outside of struct init to make sure any
|
||||
* padding is zero initialized
|
||||
*/
|
||||
attr.kern_version = kern_version;
|
||||
|
||||
log_buf[0] = 0;
|
||||
|
||||
return syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
|
||||
}
|
||||
|
||||
int bpf_prog_attach(int prog_fd, int target_fd, enum bpf_attach_type type)
|
||||
{
|
||||
union bpf_attr attr = {
|
||||
@ -124,25 +32,6 @@ int bpf_prog_detach(int target_fd, enum bpf_attach_type type)
|
||||
return syscall(__NR_bpf, BPF_PROG_DETACH, &attr, sizeof(attr));
|
||||
}
|
||||
|
||||
int bpf_obj_pin(int fd, const char *pathname)
|
||||
{
|
||||
union bpf_attr attr = {
|
||||
.pathname = ptr_to_u64((void *)pathname),
|
||||
.bpf_fd = fd,
|
||||
};
|
||||
|
||||
return syscall(__NR_bpf, BPF_OBJ_PIN, &attr, sizeof(attr));
|
||||
}
|
||||
|
||||
int bpf_obj_get(const char *pathname)
|
||||
{
|
||||
union bpf_attr attr = {
|
||||
.pathname = ptr_to_u64((void *)pathname),
|
||||
};
|
||||
|
||||
return syscall(__NR_bpf, BPF_OBJ_GET, &attr, sizeof(attr));
|
||||
}
|
||||
|
||||
int open_raw_sock(const char *name)
|
||||
{
|
||||
struct sockaddr_ll sll;
|
||||
|
||||
@ -2,28 +2,13 @@
|
||||
#ifndef __LIBBPF_H
|
||||
#define __LIBBPF_H
|
||||
|
||||
#include <bpf/bpf.h>
|
||||
|
||||
struct bpf_insn;
|
||||
|
||||
int bpf_create_map(enum bpf_map_type map_type, int key_size, int value_size,
|
||||
int max_entries, int map_flags);
|
||||
int bpf_map_update_elem(int fd, void *key, void *value, unsigned long long flags);
|
||||
int bpf_map_lookup_elem(int fd, void *key, void *value);
|
||||
int bpf_map_delete_elem(int fd, void *key);
|
||||
int bpf_map_get_next_key(int fd, void *key, void *next_key);
|
||||
|
||||
int bpf_load_program(enum bpf_prog_type prog_type,
|
||||
const struct bpf_insn *insns, int insn_len,
|
||||
const char *license, int kern_version,
|
||||
char *log_buf, size_t log_buf_sz);
|
||||
|
||||
int bpf_prog_attach(int prog_fd, int attachable_fd, enum bpf_attach_type type);
|
||||
int bpf_prog_detach(int attachable_fd, enum bpf_attach_type type);
|
||||
|
||||
int bpf_obj_pin(int fd, const char *pathname);
|
||||
int bpf_obj_get(const char *pathname);
|
||||
|
||||
#define BPF_LOG_BUF_SIZE (256 * 1024)
|
||||
|
||||
/* ALU ops on registers, bpf_add|sub|...: dst_reg += src_reg */
|
||||
|
||||
#define BPF_ALU64_REG(OP, DST, SRC) \
|
||||
|
||||
@ -56,8 +56,9 @@ static int test_sock(void)
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0), /* r0 = 0 */
|
||||
BPF_EXIT_INSN(),
|
||||
};
|
||||
size_t insns_cnt = sizeof(prog) / sizeof(struct bpf_insn);
|
||||
|
||||
prog_fd = bpf_load_program(BPF_PROG_TYPE_SOCKET_FILTER, prog, sizeof(prog),
|
||||
prog_fd = bpf_load_program(BPF_PROG_TYPE_SOCKET_FILTER, prog, insns_cnt,
|
||||
"GPL", 0, bpf_log_buf, BPF_LOG_BUF_SIZE);
|
||||
if (prog_fd < 0) {
|
||||
printf("failed to load prog '%s'\n", strerror(errno));
|
||||
|
||||
@ -68,9 +68,10 @@ static int prog_load(int map_fd, int verdict)
|
||||
BPF_MOV64_IMM(BPF_REG_0, verdict), /* r0 = verdict */
|
||||
BPF_EXIT_INSN(),
|
||||
};
|
||||
size_t insns_cnt = sizeof(prog) / sizeof(struct bpf_insn);
|
||||
|
||||
return bpf_load_program(BPF_PROG_TYPE_CGROUP_SKB,
|
||||
prog, sizeof(prog), "GPL", 0,
|
||||
prog, insns_cnt, "GPL", 0,
|
||||
bpf_log_buf, BPF_LOG_BUF_SIZE);
|
||||
}
|
||||
|
||||
|
||||
@ -41,9 +41,10 @@ static int prog_load(int verdict)
|
||||
BPF_MOV64_IMM(BPF_REG_0, verdict), /* r0 = verdict */
|
||||
BPF_EXIT_INSN(),
|
||||
};
|
||||
size_t insns_cnt = sizeof(prog) / sizeof(struct bpf_insn);
|
||||
|
||||
ret = bpf_load_program(BPF_PROG_TYPE_CGROUP_SKB,
|
||||
prog, sizeof(prog), "GPL", 0,
|
||||
prog, insns_cnt, "GPL", 0,
|
||||
bpf_log_buf, BPF_LOG_BUF_SIZE);
|
||||
|
||||
if (ret < 0) {
|
||||
|
||||
@ -35,8 +35,9 @@ static int prog_load(int idx)
|
||||
BPF_MOV64_IMM(BPF_REG_0, 1), /* r0 = verdict */
|
||||
BPF_EXIT_INSN(),
|
||||
};
|
||||
size_t insns_cnt = sizeof(prog) / sizeof(struct bpf_insn);
|
||||
|
||||
return bpf_load_program(BPF_PROG_TYPE_CGROUP_SOCK, prog, sizeof(prog),
|
||||
return bpf_load_program(BPF_PROG_TYPE_CGROUP_SOCK, prog, insns_cnt,
|
||||
"GPL", 0, bpf_log_buf, BPF_LOG_BUF_SIZE);
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user