提交 205c8ada 编写于 作者: J Joe Stringer 提交者: Arnaldo Carvalho de Melo

samples/bpf: Remove perf_event_open() declaration

This declaration was made in samples/bpf/libbpf.c for convenience, but
there's already one in tools/perf/perf-sys.h. Reuse that one.

Committer notes:

Testing it:

  $ make -j4 O=../build/v4.9.0-rc8+ samples/bpf/
  make[1]: Entering directory '/home/build/v4.9.0-rc8+'
    CHK     include/config/kernel.release
    GEN     ./Makefile
    CHK     include/generated/uapi/linux/version.h
    Using /home/acme/git/linux as source for kernel
    CHK     include/generated/utsrelease.h
    CHK     include/generated/timeconst.h
    CHK     include/generated/bounds.h
    CHK     include/generated/asm-offsets.h
    CALL    /home/acme/git/linux/scripts/checksyscalls.sh
    HOSTCC  samples/bpf/test_verifier.o
    HOSTCC  samples/bpf/libbpf.o
    HOSTCC  samples/bpf/../../tools/lib/bpf/bpf.o
    HOSTCC  samples/bpf/test_maps.o
    HOSTCC  samples/bpf/sock_example.o
    HOSTCC  samples/bpf/bpf_load.o
<SNIP>
    HOSTLD  samples/bpf/trace_event
    HOSTLD  samples/bpf/sampleip
    HOSTLD  samples/bpf/tc_l2_redirect
  make[1]: Leaving directory '/home/build/v4.9.0-rc8+'
  $

Also tested the offwaketime resulting from the rebuild, seems to work as
before.
Signed-off-by: NJoe Stringer <joe@ovn.org>
Tested-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/20161209024620.31660-7-joe@ovn.org
[ Use -I$(srctree)/tools/lib/ to support out of source code tree builds ]
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
上级 811b4f0d
...@@ -109,6 +109,8 @@ always += xdp_tx_iptunnel_kern.o ...@@ -109,6 +109,8 @@ always += xdp_tx_iptunnel_kern.o
HOSTCFLAGS += -I$(objtree)/usr/include HOSTCFLAGS += -I$(objtree)/usr/include
HOSTCFLAGS += -I$(srctree)/tools/lib/ HOSTCFLAGS += -I$(srctree)/tools/lib/
HOSTCFLAGS += -I$(srctree)/tools/testing/selftests/bpf/ HOSTCFLAGS += -I$(srctree)/tools/testing/selftests/bpf/
HOSTCFLAGS += -I$(srctree)/tools/lib/ -I$(srctree)/tools/include
HOSTCFLAGS += -I$(srctree)/tools/perf
HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable
HOSTLOADLIBES_fds_example += -lelf HOSTLOADLIBES_fds_example += -lelf
......
...@@ -23,6 +23,7 @@ ...@@ -23,6 +23,7 @@
#include <ctype.h> #include <ctype.h>
#include "libbpf.h" #include "libbpf.h"
#include "bpf_load.h" #include "bpf_load.h"
#include "perf-sys.h"
#define DEBUGFS "/sys/kernel/debug/tracing/" #define DEBUGFS "/sys/kernel/debug/tracing/"
...@@ -179,7 +180,7 @@ static int load_and_attach(const char *event, struct bpf_insn *prog, int size) ...@@ -179,7 +180,7 @@ static int load_and_attach(const char *event, struct bpf_insn *prog, int size)
id = atoi(buf); id = atoi(buf);
attr.config = id; attr.config = id;
efd = perf_event_open(&attr, -1/*pid*/, 0/*cpu*/, -1/*group_fd*/, 0); efd = sys_perf_event_open(&attr, -1/*pid*/, 0/*cpu*/, -1/*group_fd*/, 0);
if (efd < 0) { if (efd < 0) {
printf("event %d fd %d err %s\n", id, efd, strerror(errno)); printf("event %d fd %d err %s\n", id, efd, strerror(errno));
return -1; return -1;
......
...@@ -34,10 +34,3 @@ int open_raw_sock(const char *name) ...@@ -34,10 +34,3 @@ int open_raw_sock(const char *name)
return sock; return sock;
} }
int perf_event_open(struct perf_event_attr *attr, int pid, int cpu,
int group_fd, unsigned long flags)
{
return syscall(__NR_perf_event_open, attr, pid, cpu,
group_fd, flags);
}
...@@ -188,7 +188,4 @@ struct bpf_insn; ...@@ -188,7 +188,4 @@ struct bpf_insn;
/* create RAW socket and bind to interface 'name' */ /* create RAW socket and bind to interface 'name' */
int open_raw_sock(const char *name); int open_raw_sock(const char *name);
struct perf_event_attr;
int perf_event_open(struct perf_event_attr *attr, int pid, int cpu,
int group_fd, unsigned long flags);
#endif #endif
...@@ -21,6 +21,7 @@ ...@@ -21,6 +21,7 @@
#include <sys/ioctl.h> #include <sys/ioctl.h>
#include "libbpf.h" #include "libbpf.h"
#include "bpf_load.h" #include "bpf_load.h"
#include "perf-sys.h"
#define DEFAULT_FREQ 99 #define DEFAULT_FREQ 99
#define DEFAULT_SECS 5 #define DEFAULT_SECS 5
...@@ -49,7 +50,7 @@ static int sampling_start(int *pmu_fd, int freq) ...@@ -49,7 +50,7 @@ static int sampling_start(int *pmu_fd, int freq)
}; };
for (i = 0; i < nr_cpus; i++) { for (i = 0; i < nr_cpus; i++) {
pmu_fd[i] = perf_event_open(&pe_sample_attr, -1 /* pid */, i, pmu_fd[i] = sys_perf_event_open(&pe_sample_attr, -1 /* pid */, i,
-1 /* group_fd */, 0 /* flags */); -1 /* group_fd */, 0 /* flags */);
if (pmu_fd[i] < 0) { if (pmu_fd[i] < 0) {
fprintf(stderr, "ERROR: Initializing perf sampling\n"); fprintf(stderr, "ERROR: Initializing perf sampling\n");
......
...@@ -20,6 +20,7 @@ ...@@ -20,6 +20,7 @@
#include <sys/resource.h> #include <sys/resource.h>
#include "libbpf.h" #include "libbpf.h"
#include "bpf_load.h" #include "bpf_load.h"
#include "perf-sys.h"
#define SAMPLE_FREQ 50 #define SAMPLE_FREQ 50
...@@ -125,9 +126,9 @@ static void test_perf_event_all_cpu(struct perf_event_attr *attr) ...@@ -125,9 +126,9 @@ static void test_perf_event_all_cpu(struct perf_event_attr *attr)
/* open perf_event on all cpus */ /* open perf_event on all cpus */
for (i = 0; i < nr_cpus; i++) { for (i = 0; i < nr_cpus; i++) {
pmu_fd[i] = perf_event_open(attr, -1, i, -1, 0); pmu_fd[i] = sys_perf_event_open(attr, -1, i, -1, 0);
if (pmu_fd[i] < 0) { if (pmu_fd[i] < 0) {
printf("perf_event_open failed\n"); printf("sys_perf_event_open failed\n");
goto all_cpu_err; goto all_cpu_err;
} }
assert(ioctl(pmu_fd[i], PERF_EVENT_IOC_SET_BPF, prog_fd[0]) == 0); assert(ioctl(pmu_fd[i], PERF_EVENT_IOC_SET_BPF, prog_fd[0]) == 0);
...@@ -146,9 +147,9 @@ static void test_perf_event_task(struct perf_event_attr *attr) ...@@ -146,9 +147,9 @@ static void test_perf_event_task(struct perf_event_attr *attr)
int pmu_fd; int pmu_fd;
/* open task bound event */ /* open task bound event */
pmu_fd = perf_event_open(attr, 0, -1, -1, 0); pmu_fd = sys_perf_event_open(attr, 0, -1, -1, 0);
if (pmu_fd < 0) { if (pmu_fd < 0) {
printf("perf_event_open failed\n"); printf("sys_perf_event_open failed\n");
return; return;
} }
assert(ioctl(pmu_fd, PERF_EVENT_IOC_SET_BPF, prog_fd[0]) == 0); assert(ioctl(pmu_fd, PERF_EVENT_IOC_SET_BPF, prog_fd[0]) == 0);
......
...@@ -21,6 +21,7 @@ ...@@ -21,6 +21,7 @@
#include <signal.h> #include <signal.h>
#include "libbpf.h" #include "libbpf.h"
#include "bpf_load.h" #include "bpf_load.h"
#include "perf-sys.h"
static int pmu_fd; static int pmu_fd;
...@@ -159,7 +160,7 @@ static void test_bpf_perf_event(void) ...@@ -159,7 +160,7 @@ static void test_bpf_perf_event(void)
}; };
int key = 0; int key = 0;
pmu_fd = perf_event_open(&attr, -1/*pid*/, 0/*cpu*/, -1/*group_fd*/, 0); pmu_fd = sys_perf_event_open(&attr, -1/*pid*/, 0/*cpu*/, -1/*group_fd*/, 0);
assert(pmu_fd >= 0); assert(pmu_fd >= 0);
assert(bpf_map_update_elem(map_fd[0], &key, &pmu_fd, BPF_ANY) == 0); assert(bpf_map_update_elem(map_fd[0], &key, &pmu_fd, BPF_ANY) == 0);
......
...@@ -10,6 +10,7 @@ ...@@ -10,6 +10,7 @@
#include <linux/bpf.h> #include <linux/bpf.h>
#include "libbpf.h" #include "libbpf.h"
#include "bpf_load.h" #include "bpf_load.h"
#include "perf-sys.h"
#define SAMPLE_PERIOD 0x7fffffffffffffffULL #define SAMPLE_PERIOD 0x7fffffffffffffffULL
...@@ -30,7 +31,7 @@ static void test_bpf_perf_event(void) ...@@ -30,7 +31,7 @@ static void test_bpf_perf_event(void)
}; };
for (i = 0; i < nr_cpus; i++) { for (i = 0; i < nr_cpus; i++) {
pmu_fd[i] = perf_event_open(&attr_insn_pmu, -1/*pid*/, i/*cpu*/, -1/*group_fd*/, 0); pmu_fd[i] = sys_perf_event_open(&attr_insn_pmu, -1/*pid*/, i/*cpu*/, -1/*group_fd*/, 0);
if (pmu_fd[i] < 0) { if (pmu_fd[i] < 0) {
printf("event syscall failed\n"); printf("event syscall failed\n");
goto exit; goto exit;
......
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