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-rw-r--r--samples/bpf/Makefile24
-rw-r--r--samples/bpf/bpf_helpers.h19
-rw-r--r--samples/bpf/bpf_load.c38
-rw-r--r--samples/bpf/load_sock_ops.c97
-rw-r--r--samples/bpf/sockex3_user.c15
-rw-r--r--samples/bpf/syscall_nrs.c12
-rw-r--r--samples/bpf/tcp_bufs_kern.c86
-rw-r--r--samples/bpf/tcp_clamp_kern.c102
-rw-r--r--samples/bpf/tcp_cong_kern.c83
-rw-r--r--samples/bpf/tcp_iw_kern.c88
-rw-r--r--samples/bpf/tcp_rwnd_kern.c69
-rw-r--r--samples/bpf/tcp_synrto_kern.c69
-rw-r--r--samples/bpf/test_map_in_map_user.c17
-rw-r--r--samples/bpf/trace_event_user.c73
-rw-r--r--samples/bpf/tracex5_kern.c11
-rw-r--r--samples/bpf/tracex6_kern.c28
-rw-r--r--samples/bpf/tracex6_user.c180
17 files changed, 932 insertions, 79 deletions
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 6c7468eb3684..9c650589e80f 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -36,6 +36,7 @@ hostprogs-y += lwt_len_hist
hostprogs-y += xdp_tx_iptunnel
hostprogs-y += test_map_in_map
hostprogs-y += per_socket_stats_example
+hostprogs-y += load_sock_ops
# Libbpf dependencies
LIBBPF := ../../tools/lib/bpf/bpf.o
@@ -52,6 +53,7 @@ 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
+load_sock_ops-objs := bpf_load.o $(LIBBPF) load_sock_ops.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 $(LIBBPF) lathist_user.o
@@ -111,6 +113,12 @@ always += lwt_len_hist_kern.o
always += xdp_tx_iptunnel_kern.o
always += test_map_in_map_kern.o
always += cookie_uid_helper_example.o
+always += tcp_synrto_kern.o
+always += tcp_rwnd_kern.o
+always += tcp_bufs_kern.o
+always += tcp_cong_kern.o
+always += tcp_iw_kern.o
+always += tcp_clamp_kern.o
HOSTCFLAGS += -I$(objtree)/usr/include
HOSTCFLAGS += -I$(srctree)/tools/lib/
@@ -130,6 +138,7 @@ HOSTLOADLIBES_tracex4 += -lelf -lrt
HOSTLOADLIBES_tracex5 += -lelf
HOSTLOADLIBES_tracex6 += -lelf
HOSTLOADLIBES_test_cgrp2_sock2 += -lelf
+HOSTLOADLIBES_load_sock_ops += -lelf
HOSTLOADLIBES_test_probe_write_user += -lelf
HOSTLOADLIBES_trace_output += -lelf -lrt
HOSTLOADLIBES_lathist += -lelf
@@ -160,6 +169,17 @@ clean:
$(MAKE) -C ../../ M=$(CURDIR) clean
@rm -f *~
+$(obj)/syscall_nrs.s: $(src)/syscall_nrs.c
+ $(call if_changed_dep,cc_s_c)
+
+$(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s FORCE
+ $(call filechk,offsets,__SYSCALL_NRS_H__)
+
+clean-files += syscall_nrs.h
+
+FORCE:
+
+
# Verify LLVM compiler tools are available and bpf target is supported by llc
.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
@@ -180,11 +200,13 @@ verify_target_bpf: verify_cmds
$(src)/*.c: verify_target_bpf
+$(obj)/tracex5_kern.o: $(obj)/syscall_nrs.h
+
# asm/sysreg.h - inline assembly used by it is incompatible with llvm.
# But, there is no easy way to fix it, so just exclude it since it is
# useless for BPF samples.
$(obj)/%.o: $(src)/%.c
- $(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \
+ $(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) -I$(obj) \
-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 \
diff --git a/samples/bpf/bpf_helpers.h b/samples/bpf/bpf_helpers.h
index 9a9c95f2c9fb..d50ac342dc92 100644
--- a/samples/bpf/bpf_helpers.h
+++ b/samples/bpf/bpf_helpers.h
@@ -31,7 +31,8 @@ static unsigned long long (*bpf_get_current_uid_gid)(void) =
(void *) BPF_FUNC_get_current_uid_gid;
static int (*bpf_get_current_comm)(void *buf, int buf_size) =
(void *) BPF_FUNC_get_current_comm;
-static int (*bpf_perf_event_read)(void *map, int index) =
+static unsigned long long (*bpf_perf_event_read)(void *map,
+ unsigned long long flags) =
(void *) BPF_FUNC_perf_event_read;
static int (*bpf_clone_redirect)(void *ctx, int ifindex, int flags) =
(void *) BPF_FUNC_clone_redirect;
@@ -59,6 +60,9 @@ static unsigned long long (*bpf_get_prandom_u32)(void) =
(void *) BPF_FUNC_get_prandom_u32;
static int (*bpf_xdp_adjust_head)(void *ctx, int offset) =
(void *) BPF_FUNC_xdp_adjust_head;
+static int (*bpf_setsockopt)(void *ctx, int level, int optname, void *optval,
+ int optlen) =
+ (void *) BPF_FUNC_setsockopt;
/* llvm builtin functions that eBPF C program may use to
* emit BPF_LD_ABS and BPF_LD_IND instructions
@@ -135,6 +139,19 @@ static int (*bpf_skb_change_head)(void *, int len, int flags) =
#define PT_REGS_SP(x) ((x)->sp)
#define PT_REGS_IP(x) ((x)->pc)
+#elif defined(__mips__)
+
+#define PT_REGS_PARM1(x) ((x)->regs[4])
+#define PT_REGS_PARM2(x) ((x)->regs[5])
+#define PT_REGS_PARM3(x) ((x)->regs[6])
+#define PT_REGS_PARM4(x) ((x)->regs[7])
+#define PT_REGS_PARM5(x) ((x)->regs[8])
+#define PT_REGS_RET(x) ((x)->regs[31])
+#define PT_REGS_FP(x) ((x)->regs[30]) /* Works only with CONFIG_FRAME_POINTER */
+#define PT_REGS_RC(x) ((x)->regs[1])
+#define PT_REGS_SP(x) ((x)->regs[29])
+#define PT_REGS_IP(x) ((x)->cp0_epc)
+
#elif defined(__powerpc__)
#define PT_REGS_PARM1(x) ((x)->gpr[3])
diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c
index 74456b3eb89a..899f40310bc3 100644
--- a/samples/bpf/bpf_load.c
+++ b/samples/bpf/bpf_load.c
@@ -64,6 +64,7 @@ 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;
+ bool is_sockops = strncmp(event, "sockops", 7) == 0;
size_t insns_cnt = size / sizeof(struct bpf_insn);
enum bpf_prog_type prog_type;
char buf[256];
@@ -89,6 +90,8 @@ static int load_and_attach(const char *event, struct bpf_insn *prog, int size)
prog_type = BPF_PROG_TYPE_CGROUP_SKB;
} else if (is_cgroup_sk) {
prog_type = BPF_PROG_TYPE_CGROUP_SOCK;
+ } else if (is_sockops) {
+ prog_type = BPF_PROG_TYPE_SOCK_OPS;
} else {
printf("Unknown event '%s'\n", event);
return -1;
@@ -106,8 +109,11 @@ static int load_and_attach(const char *event, struct bpf_insn *prog, int size)
if (is_xdp || is_perf_event || is_cgroup_skb || is_cgroup_sk)
return 0;
- if (is_socket) {
- event += 6;
+ if (is_socket || is_sockops) {
+ if (is_socket)
+ event += 6;
+ else
+ event += 7;
if (*event != '/')
return 0;
event++;
@@ -516,16 +522,18 @@ static int do_load_bpf_file(const char *path, fixup_map_cb fixup_map)
processed_sec[maps_shndx] = true;
}
- /* load programs that need map fixup (relocations) */
+ /* process all relo sections, and rewrite bpf insns for maps */
for (i = 1; i < ehdr.e_shnum; i++) {
if (processed_sec[i])
continue;
if (get_sec(elf, i, &ehdr, &shname, &shdr, &data))
continue;
+
if (shdr.sh_type == SHT_REL) {
struct bpf_insn *insns;
+ /* locate prog sec that need map fixup (relocations) */
if (get_sec(elf, shdr.sh_info, &ehdr, &shname_prog,
&shdr_prog, &data_prog))
continue;
@@ -535,26 +543,15 @@ static int do_load_bpf_file(const char *path, fixup_map_cb fixup_map)
continue;
insns = (struct bpf_insn *) data_prog->d_buf;
-
- processed_sec[shdr.sh_info] = true;
- processed_sec[i] = true;
+ processed_sec[i] = true; /* relo section */
if (parse_relo_and_apply(data, symbols, &shdr, insns,
map_data, nr_maps))
continue;
-
- if (memcmp(shname_prog, "kprobe/", 7) == 0 ||
- memcmp(shname_prog, "kretprobe/", 10) == 0 ||
- memcmp(shname_prog, "tracepoint/", 11) == 0 ||
- memcmp(shname_prog, "xdp", 3) == 0 ||
- memcmp(shname_prog, "perf_event", 10) == 0 ||
- memcmp(shname_prog, "socket", 6) == 0 ||
- memcmp(shname_prog, "cgroup/", 7) == 0)
- load_and_attach(shname_prog, insns, data_prog->d_size);
}
}
- /* load programs that don't use maps */
+ /* load programs */
for (i = 1; i < ehdr.e_shnum; i++) {
if (processed_sec[i])
@@ -569,8 +566,13 @@ static int do_load_bpf_file(const char *path, fixup_map_cb fixup_map)
memcmp(shname, "xdp", 3) == 0 ||
memcmp(shname, "perf_event", 10) == 0 ||
memcmp(shname, "socket", 6) == 0 ||
- memcmp(shname, "cgroup/", 7) == 0)
- load_and_attach(shname, data->d_buf, data->d_size);
+ memcmp(shname, "cgroup/", 7) == 0 ||
+ memcmp(shname, "sockops", 7) == 0) {
+ ret = load_and_attach(shname, data->d_buf,
+ data->d_size);
+ if (ret != 0)
+ goto done;
+ }
}
ret = 0;
diff --git a/samples/bpf/load_sock_ops.c b/samples/bpf/load_sock_ops.c
new file mode 100644
index 000000000000..e5da6cf71a3e
--- /dev/null
+++ b/samples/bpf/load_sock_ops.c
@@ -0,0 +1,97 @@
+/* Copyright (c) 2017 Facebook
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <linux/bpf.h>
+#include "libbpf.h"
+#include "bpf_load.h"
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <linux/unistd.h>
+
+static void usage(char *pname)
+{
+ printf("USAGE:\n %s [-l] <cg-path> <prog filename>\n", pname);
+ printf("\tLoad and attach a sock_ops program to the specified "
+ "cgroup\n");
+ printf("\tIf \"-l\" is used, the program will continue to run\n");
+ printf("\tprinting the BPF log buffer\n");
+ printf("\tIf the specified filename does not end in \".o\", it\n");
+ printf("\tappends \"_kern.o\" to the name\n");
+ printf("\n");
+ printf(" %s -r <cg-path>\n", pname);
+ printf("\tDetaches the currently attached sock_ops program\n");
+ printf("\tfrom the specified cgroup\n");
+ printf("\n");
+ exit(1);
+}
+
+int main(int argc, char **argv)
+{
+ int logFlag = 0;
+ int error = 0;
+ char *cg_path;
+ char fn[500];
+ char *prog;
+ int cg_fd;
+
+ if (argc < 3)
+ usage(argv[0]);
+
+ if (!strcmp(argv[1], "-r")) {
+ cg_path = argv[2];
+ cg_fd = open(cg_path, O_DIRECTORY, O_RDONLY);
+ error = bpf_prog_detach(cg_fd, BPF_CGROUP_SOCK_OPS);
+ if (error) {
+ printf("ERROR: bpf_prog_detach: %d (%s)\n",
+ error, strerror(errno));
+ return 2;
+ }
+ return 0;
+ } else if (!strcmp(argv[1], "-h")) {
+ usage(argv[0]);
+ } else if (!strcmp(argv[1], "-l")) {
+ logFlag = 1;
+ if (argc < 4)
+ usage(argv[0]);
+ }
+
+ prog = argv[argc - 1];
+ cg_path = argv[argc - 2];
+ if (strlen(prog) > 480) {
+ fprintf(stderr, "ERROR: program name too long (> 480 chars)\n");
+ return 3;
+ }
+ cg_fd = open(cg_path, O_DIRECTORY, O_RDONLY);
+
+ if (!strcmp(prog + strlen(prog)-2, ".o"))
+ strcpy(fn, prog);
+ else
+ sprintf(fn, "%s_kern.o", prog);
+ if (logFlag)
+ printf("loading bpf file:%s\n", fn);
+ if (load_bpf_file(fn)) {
+ printf("ERROR: load_bpf_file failed for: %s\n", fn);
+ printf("%s", bpf_log_buf);
+ return 4;
+ }
+ if (logFlag)
+ printf("TCP BPF Loaded %s\n", fn);
+
+ error = bpf_prog_attach(prog_fd[0], cg_fd, BPF_CGROUP_SOCK_OPS, 0);
+ if (error) {
+ printf("ERROR: bpf_prog_attach: %d (%s)\n",
+ error, strerror(errno));
+ return 5;
+ } else if (logFlag) {
+ read_trace_pipe();
+ }
+
+ return error;
+}
diff --git a/samples/bpf/sockex3_user.c b/samples/bpf/sockex3_user.c
index b5524d417eb5..877ecf8fc5ac 100644
--- a/samples/bpf/sockex3_user.c
+++ b/samples/bpf/sockex3_user.c
@@ -8,6 +8,10 @@
#include <arpa/inet.h>
#include <sys/resource.h>
+#define PARSE_IP 3
+#define PARSE_IP_PROG_FD (prog_fd[0])
+#define PROG_ARRAY_FD (map_fd[0])
+
struct bpf_flow_keys {
__be32 src;
__be32 dst;
@@ -28,7 +32,9 @@ int main(int argc, char **argv)
struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
char filename[256];
FILE *f;
- int i, sock;
+ int i, sock, err, id, key = PARSE_IP;
+ struct bpf_prog_info info = {};
+ uint32_t info_len = sizeof(info);
snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
setrlimit(RLIMIT_MEMLOCK, &r);
@@ -38,6 +44,13 @@ int main(int argc, char **argv)
return 1;
}
+ /* Test fd array lookup which returns the id of the bpf_prog */
+ err = bpf_obj_get_info_by_fd(PARSE_IP_PROG_FD, &info, &info_len);
+ assert(!err);
+ err = bpf_map_lookup_elem(PROG_ARRAY_FD, &key, &id);
+ assert(!err);
+ assert(id == info.id);
+
sock = open_raw_sock("lo");
assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd[4],
diff --git a/samples/bpf/syscall_nrs.c b/samples/bpf/syscall_nrs.c
new file mode 100644
index 000000000000..ce2a30b11248
--- /dev/null
+++ b/samples/bpf/syscall_nrs.c
@@ -0,0 +1,12 @@
+#include <uapi/linux/unistd.h>
+#include <linux/kbuild.h>
+
+#define SYSNR(_NR) DEFINE(SYS ## _NR, _NR)
+
+void syscall_defines(void)
+{
+ COMMENT("Linux system call numbers.");
+ SYSNR(__NR_write);
+ SYSNR(__NR_read);
+ SYSNR(__NR_mmap);
+}
diff --git a/samples/bpf/tcp_bufs_kern.c b/samples/bpf/tcp_bufs_kern.c
new file mode 100644
index 000000000000..ee83bbabd17c
--- /dev/null
+++ b/samples/bpf/tcp_bufs_kern.c
@@ -0,0 +1,86 @@
+/* Copyright (c) 2017 Facebook
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * BPF program to set initial receive window to 40 packets and send
+ * and receive buffers to 1.5MB. This would usually be done after
+ * doing appropriate checks that indicate the hosts are far enough
+ * away (i.e. large RTT).
+ *
+ * Use load_sock_ops to load this BPF program.
+ */
+
+#include <uapi/linux/bpf.h>
+#include <uapi/linux/if_ether.h>
+#include <uapi/linux/if_packet.h>
+#include <uapi/linux/ip.h>
+#include <linux/socket.h>
+#include "bpf_helpers.h"
+#include "bpf_endian.h"
+
+#define DEBUG 1
+
+#define bpf_printk(fmt, ...) \
+({ \
+ char ____fmt[] = fmt; \
+ bpf_trace_printk(____fmt, sizeof(____fmt), \
+ ##__VA_ARGS__); \
+})
+
+SEC("sockops")
+int bpf_bufs(struct bpf_sock_ops *skops)
+{
+ int bufsize = 1500000;
+ int rwnd_init = 40;
+ int rv = 0;
+ int op;
+
+ /* For testing purposes, only execute rest of BPF program
+ * if neither port numberis 55601
+ */
+ if (bpf_ntohl(skops->remote_port) != 55601 &&
+ skops->local_port != 55601)
+ return -1;
+
+ op = (int) skops->op;
+
+#ifdef DEBUG
+ bpf_printk("Returning %d\n", rv);
+#endif
+
+ /* Usually there would be a check to insure the hosts are far
+ * from each other so it makes sense to increase buffer sizes
+ */
+ switch (op) {
+ case BPF_SOCK_OPS_RWND_INIT:
+ rv = rwnd_init;
+ break;
+ case BPF_SOCK_OPS_TCP_CONNECT_CB:
+ /* Set sndbuf and rcvbuf of active connections */
+ rv = bpf_setsockopt(skops, SOL_SOCKET, SO_SNDBUF, &bufsize,
+ sizeof(bufsize));
+ rv = rv*100 + bpf_setsockopt(skops, SOL_SOCKET, SO_RCVBUF,
+ &bufsize, sizeof(bufsize));
+ break;
+ case BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB:
+ /* Nothing to do */
+ break;
+ case BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB:
+ /* Set sndbuf and rcvbuf of passive connections */
+ rv = bpf_setsockopt(skops, SOL_SOCKET, SO_SNDBUF, &bufsize,
+ sizeof(bufsize));
+ rv = rv*100 + bpf_setsockopt(skops, SOL_SOCKET, SO_RCVBUF,
+ &bufsize, sizeof(bufsize));
+ break;
+ default:
+ rv = -1;
+ }
+#ifdef DEBUG
+ bpf_printk("Returning %d\n", rv);
+#endif
+ skops->reply = rv;
+ return 1;
+}
+char _license[] SEC("license") = "GPL";
diff --git a/samples/bpf/tcp_clamp_kern.c b/samples/bpf/tcp_clamp_kern.c
new file mode 100644
index 000000000000..d68eadd9ca2d
--- /dev/null
+++ b/samples/bpf/tcp_clamp_kern.c
@@ -0,0 +1,102 @@
+/* Copyright (c) 2017 Facebook
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * Sample BPF program to set send and receive buffers to 150KB, sndcwnd clamp
+ * to 100 packets and SYN and SYN_ACK RTOs to 10ms when both hosts are within
+ * the same datacenter. For his example, we assume they are within the same
+ * datacenter when the first 5.5 bytes of their IPv6 addresses are the same.
+ *
+ * Use load_sock_ops to load this BPF program.
+ */
+
+#include <uapi/linux/bpf.h>
+#include <uapi/linux/if_ether.h>
+#include <uapi/linux/if_packet.h>
+#include <uapi/linux/ip.h>
+#include <linux/socket.h>
+#include "bpf_helpers.h"
+#include "bpf_endian.h"
+
+#define DEBUG 1
+
+#define bpf_printk(fmt, ...) \
+({ \
+ char ____fmt[] = fmt; \
+ bpf_trace_printk(____fmt, sizeof(____fmt), \
+ ##__VA_ARGS__); \
+})
+
+SEC("sockops")
+int bpf_clamp(struct bpf_sock_ops *skops)
+{
+ int bufsize = 150000;
+ int to_init = 10;
+ int clamp = 100;
+ int rv = 0;
+ int op;
+
+ /* For testing purposes, only execute rest of BPF program
+ * if neither port numberis 55601
+ */
+ if (bpf_ntohl(skops->remote_port) != 55601 && skops->local_port != 55601)
+ return -1;
+
+ op = (int) skops->op;
+
+#ifdef DEBUG
+ bpf_printk("BPF command: %d\n", op);
+#endif
+
+ /* Check that both hosts are within same datacenter. For this example
+ * it is the case when the first 5.5 bytes of their IPv6 addresses are
+ * the same.
+ */
+ if (skops->family == AF_INET6 &&
+ skops->local_ip6[0] == skops->remote_ip6[0] &&
+ (bpf_ntohl(skops->local_ip6[1]) & 0xfff00000) ==
+ (bpf_ntohl(skops->remote_ip6[1]) & 0xfff00000)) {
+ switch (op) {
+ case BPF_SOCK_OPS_TIMEOUT_INIT:
+ rv = to_init;
+ break;
+ case BPF_SOCK_OPS_TCP_CONNECT_CB:
+ /* Set sndbuf and rcvbuf of active connections */
+ rv = bpf_setsockopt(skops, SOL_SOCKET, SO_SNDBUF,
+ &bufsize, sizeof(bufsize));
+ rv = rv*100 + bpf_setsockopt(skops, SOL_SOCKET,
+ SO_RCVBUF, &bufsize,
+ sizeof(bufsize));
+ break;
+ case BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB:
+ rv = bpf_setsockopt(skops, SOL_TCP,
+ TCP_BPF_SNDCWND_CLAMP,
+ &clamp, sizeof(clamp));
+ break;
+ case BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB:
+ /* Set sndbuf and rcvbuf of passive connections */
+ rv = bpf_setsockopt(skops, SOL_TCP,
+ TCP_BPF_SNDCWND_CLAMP,
+ &clamp, sizeof(clamp));
+ rv = rv*100 + bpf_setsockopt(skops, SOL_SOCKET,
+ SO_SNDBUF, &bufsize,
+ sizeof(bufsize));
+ rv = rv*100 + bpf_setsockopt(skops, SOL_SOCKET,
+ SO_RCVBUF, &bufsize,
+ sizeof(bufsize));
+ break;
+ default:
+ rv = -1;
+ }
+ } else {
+ rv = -1;
+ }
+#ifdef DEBUG
+ bpf_printk("Returning %d\n", rv);
+#endif
+ skops->reply = rv;
+ return 1;
+}
+char _license[] SEC("license") = "GPL";
diff --git a/samples/bpf/tcp_cong_kern.c b/samples/bpf/tcp_cong_kern.c
new file mode 100644
index 000000000000..dac15bce1fa9
--- /dev/null
+++ b/samples/bpf/tcp_cong_kern.c
@@ -0,0 +1,83 @@
+/* Copyright (c) 2017 Facebook
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * BPF program to set congestion control to dctcp when both hosts are
+ * in the same datacenter (as deteremined by IPv6 prefix).
+ *
+ * Use load_sock_ops to load this BPF program.
+ */
+
+#include <uapi/linux/bpf.h>
+#include <uapi/linux/tcp.h>
+#include <uapi/linux/if_ether.h>
+#include <uapi/linux/if_packet.h>
+#include <uapi/linux/ip.h>
+#include <linux/socket.h>
+#include "bpf_helpers.h"
+#include "bpf_endian.h"
+
+#define DEBUG 1
+
+#define bpf_printk(fmt, ...) \
+({ \
+ char ____fmt[] = fmt; \
+ bpf_trace_printk(____fmt, sizeof(____fmt), \
+ ##__VA_ARGS__); \
+})
+
+SEC("sockops")
+int bpf_cong(struct bpf_sock_ops *skops)
+{
+ char cong[] = "dctcp";
+ int rv = 0;
+ int op;
+
+ /* For testing purposes, only execute rest of BPF program
+ * if neither port numberis 55601
+ */
+ if (bpf_ntohl(skops->remote_port) != 55601 &&
+ skops->local_port != 55601)
+ return -1;
+
+ op = (int) skops->op;
+
+#ifdef DEBUG
+ bpf_printk("BPF command: %d\n", op);
+#endif
+
+ /* Check if both hosts are in the same datacenter. For this
+ * example they are if the 1st 5.5 bytes in the IPv6 address
+ * are the same.
+ */
+ if (skops->family == AF_INET6 &&
+ skops->local_ip6[0] == skops->remote_ip6[0] &&
+ (bpf_ntohl(skops->local_ip6[1]) & 0xfff00000) ==
+ (bpf_ntohl(skops->remote_ip6[1]) & 0xfff00000)) {
+ switch (op) {
+ case BPF_SOCK_OPS_NEEDS_ECN:
+ rv = 1;
+ break;
+ case BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB:
+ rv = bpf_setsockopt(skops, SOL_TCP, TCP_CONGESTION,
+ cong, sizeof(cong));
+ break;
+ case BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB:
+ rv = bpf_setsockopt(skops, SOL_TCP, TCP_CONGESTION,
+ cong, sizeof(cong));
+ break;
+ default:
+ rv = -1;
+ }
+ } else {
+ rv = -1;
+ }
+#ifdef DEBUG
+ bpf_printk("Returning %d\n", rv);
+#endif
+ skops->reply = rv;
+ return 1;
+}
+char _license[] SEC("license") = "GPL";
diff --git a/samples/bpf/tcp_iw_kern.c b/samples/bpf/tcp_iw_kern.c
new file mode 100644
index 000000000000..23c5122ef819
--- /dev/null
+++ b/samples/bpf/tcp_iw_kern.c
@@ -0,0 +1,88 @@
+/* Copyright (c) 2017 Facebook
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * BPF program to set initial congestion window and initial receive
+ * window to 40 packets and send and receive buffers to 1.5MB. This
+ * would usually be done after doing appropriate checks that indicate
+ * the hosts are far enough away (i.e. large RTT).
+ *
+ * Use load_sock_ops to load this BPF program.
+ */
+
+#include <uapi/linux/bpf.h>
+#include <uapi/linux/if_ether.h>
+#include <uapi/linux/if_packet.h>
+#include <uapi/linux/ip.h>
+#include <linux/socket.h>
+#include "bpf_helpers.h"
+#include "bpf_endian.h"
+
+#define DEBUG 1
+
+#define bpf_printk(fmt, ...) \
+({ \
+ char ____fmt[] = fmt; \
+ bpf_trace_printk(____fmt, sizeof(____fmt), \
+ ##__VA_ARGS__); \
+})
+
+SEC("sockops")
+int bpf_iw(struct bpf_sock_ops *skops)
+{
+ int bufsize = 1500000;
+ int rwnd_init = 40;
+ int iw = 40;
+ int rv = 0;
+ int op;
+
+ /* For testing purposes, only execute rest of BPF program
+ * if neither port numberis 55601
+ */
+ if (bpf_ntohl(skops->remote_port) != 55601 &&
+ skops->local_port != 55601)
+ return -1;
+
+ op = (int) skops->op;
+
+#ifdef DEBUG
+ bpf_printk("BPF command: %d\n", op);
+#endif
+
+ /* Usually there would be a check to insure the hosts are far
+ * from each other so it makes sense to increase buffer sizes
+ */
+ switch (op) {
+ case BPF_SOCK_OPS_RWND_INIT:
+ rv = rwnd_init;
+ break;
+ case BPF_SOCK_OPS_TCP_CONNECT_CB:
+ /* Set sndbuf and rcvbuf of active connections */
+ rv = bpf_setsockopt(skops, SOL_SOCKET, SO_SNDBUF, &bufsize,
+ sizeof(bufsize));
+ rv = rv*100 + bpf_setsockopt(skops, SOL_SOCKET, SO_RCVBUF,
+ &bufsize, sizeof(bufsize));
+ break;
+ case BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB:
+ rv = bpf_setsockopt(skops, SOL_TCP, TCP_BPF_IW, &iw,
+ sizeof(iw));
+ break;
+ case BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB:
+ /* Set sndbuf and rcvbuf of passive connections */
+ rv = bpf_setsockopt(skops, SOL_SOCKET, SO_SNDBUF, &bufsize,
+ sizeof(bufsize));
+ rv = rv*100 + bpf_setsockopt(skops, SOL_SOCKET, SO_RCVBUF,
+ &bufsize, sizeof(bufsize));
+ break;
+ default:
+ rv = -1;
+ }
+#ifdef DEBUG
+ bpf_printk("Returning %d\n", rv);
+#endif
+ skops->reply = rv;
+ return 1;
+}
+char _license[] SEC("license") = "GPL";
diff --git a/samples/bpf/tcp_rwnd_kern.c b/samples/bpf/tcp_rwnd_kern.c
new file mode 100644
index 000000000000..3f2a228f81ce
--- /dev/null
+++ b/samples/bpf/tcp_rwnd_kern.c
@@ -0,0 +1,69 @@
+/* Copyright (c) 2017 Facebook
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * BPF program to set initial receive window to 40 packets when using IPv6
+ * and the first 5.5 bytes of the IPv6 addresses are not the same (in this
+ * example that means both hosts are not the same datacenter).
+ *
+ * Use load_sock_ops to load this BPF program.
+ */
+
+#include <uapi/linux/bpf.h>
+#include <uapi/linux/if_ether.h>
+#include <uapi/linux/if_packet.h>
+#include <uapi/linux/ip.h>
+#include <linux/socket.h>
+#include "bpf_helpers.h"
+#include "bpf_endian.h"
+
+#define DEBUG 1
+
+#define bpf_printk(fmt, ...) \
+({ \
+ char ____fmt[] = fmt; \
+ bpf_trace_printk(____fmt, sizeof(____fmt), \
+ ##__VA_ARGS__); \
+})
+
+SEC("sockops")
+int bpf_rwnd(struct bpf_sock_ops *skops)
+{
+ int rv = -1;
+ int op;
+
+ /* For testing purposes, only execute rest of BPF program
+ * if neither port numberis 55601
+ */
+ if (bpf_ntohl(skops->remote_port) !=
+ 55601 && skops->local_port != 55601)
+ return -1;
+
+ op = (int) skops->op;
+
+#ifdef DEBUG
+ bpf_printk("BPF command: %d\n", op);
+#endif
+
+ /* Check for RWND_INIT operation and IPv6 addresses */
+ if (op == BPF_SOCK_OPS_RWND_INIT &&
+ skops->family == AF_INET6) {
+
+ /* If the first 5.5 bytes of the IPv6 address are not the same
+ * then both hosts are not in the same datacenter
+ * so use a larger initial advertized window (40 packets)
+ */
+ if (skops->local_ip6[0] != skops->remote_ip6[0] ||
+ (bpf_ntohl(skops->local_ip6[1]) & 0xfffff000) !=
+ (bpf_ntohl(skops->remote_ip6[1]) & 0xfffff000))
+ rv = 40;
+ }
+#ifdef DEBUG
+ bpf_printk("Returning %d\n", rv);
+#endif
+ skops->reply = rv;
+ return 1;
+}
+char _license[] SEC("license") = "GPL";
diff --git a/samples/bpf/tcp_synrto_kern.c b/samples/bpf/tcp_synrto_kern.c
new file mode 100644
index 000000000000..3c3fc83d81cb
--- /dev/null
+++ b/samples/bpf/tcp_synrto_kern.c
@@ -0,0 +1,69 @@
+/* Copyright (c) 2017 Facebook
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * BPF program to set SYN and SYN-ACK RTOs to 10ms when using IPv6 addresses
+ * and the first 5.5 bytes of the IPv6 addresses are the same (in this example
+ * that means both hosts are in the same datacenter).
+ *
+ * Use load_sock_ops to load this BPF program.
+ */
+
+#include <uapi/linux/bpf.h>
+#include <uapi/linux/if_ether.h>
+#include <uapi/linux/if_packet.h>
+#include <uapi/linux/ip.h>
+#include <linux/socket.h>
+#include "bpf_helpers.h"
+#include "bpf_endian.h"
+
+#define DEBUG 1
+
+#define bpf_printk(fmt, ...) \
+({ \
+ char ____fmt[] = fmt; \
+ bpf_trace_printk(____fmt, sizeof(____fmt), \
+ ##__VA_ARGS__); \
+})
+
+SEC("sockops")
+int bpf_synrto(struct bpf_sock_ops *skops)
+{
+ int rv = -1;
+ int op;
+
+ /* For testing purposes, only execute rest of BPF program
+ * if neither port numberis 55601
+ */
+ if (bpf_ntohl(skops->remote_port) != 55601 &&
+ skops->local_port != 55601)
+ return -1;
+
+ op = (int) skops->op;
+
+#ifdef DEBUG
+ bpf_printk("BPF command: %d\n", op);
+#endif
+
+ /* Check for TIMEOUT_INIT operation and IPv6 addresses */
+ if (op == BPF_SOCK_OPS_TIMEOUT_INIT &&
+ skops->family == AF_INET6) {
+
+ /* If the first 5.5 bytes of the IPv6 address are the same
+ * then both hosts are in the same datacenter
+ * so use an RTO of 10ms
+ */
+ if (skops->local_ip6[0] == skops->remote_ip6[0] &&
+ (bpf_ntohl(skops->local_ip6[1]) & 0xfff00000) ==
+ (bpf_ntohl(skops->remote_ip6[1]) & 0xfff00000))
+ rv = 10;
+ }
+#ifdef DEBUG
+ bpf_printk("Returning %d\n", rv);
+#endif
+ skops->reply = rv;
+ return 1;
+}
+char _license[] SEC("license") = "GPL";
diff --git a/samples/bpf/test_map_in_map_user.c b/samples/bpf/test_map_in_map_user.c
index f62fdc2bd428..1aca18539d8d 100644
--- a/samples/bpf/test_map_in_map_user.c
+++ b/samples/bpf/test_map_in_map_user.c
@@ -32,6 +32,20 @@ static const char * const test_names[] = {
#define NR_TESTS (sizeof(test_names) / sizeof(*test_names))
+static void check_map_id(int inner_map_fd, int map_in_map_fd, uint32_t key)
+{
+ struct bpf_map_info info = {};
+ uint32_t info_len = sizeof(info);
+ int ret, id;
+
+ ret = bpf_obj_get_info_by_fd(inner_map_fd, &info, &info_len);
+ assert(!ret);
+
+ ret = bpf_map_lookup_elem(map_in_map_fd, &key, &id);
+ assert(!ret);
+ assert(id == info.id);
+}
+
static void populate_map(uint32_t port_key, int magic_result)
{
int ret;
@@ -45,12 +59,15 @@ static void populate_map(uint32_t port_key, int magic_result)
ret = bpf_map_update_elem(A_OF_PORT_A, &port_key, &PORT_A, BPF_ANY);
assert(!ret);
+ check_map_id(PORT_A, A_OF_PORT_A, port_key);
ret = bpf_map_update_elem(H_OF_PORT_A, &port_key, &PORT_A, BPF_NOEXIST);
assert(!ret);
+ check_map_id(PORT_A, H_OF_PORT_A, port_key);
ret = bpf_map_update_elem(H_OF_PORT_H, &port_key, &PORT_H, BPF_NOEXIST);
assert(!ret);
+ check_map_id(PORT_H, H_OF_PORT_H, port_key);
}
static void test_map_in_map(void)
diff --git a/samples/bpf/trace_event_user.c b/samples/bpf/trace_event_user.c
index fa4336423da5..7bd827b84a67 100644
--- a/samples/bpf/trace_event_user.c
+++ b/samples/bpf/trace_event_user.c
@@ -75,7 +75,10 @@ static void print_stack(struct key_t *key, __u64 count)
for (i = PERF_MAX_STACK_DEPTH - 1; i >= 0; i--)
print_addr(ip[i]);
}
- printf("\n");
+ if (count < 6)
+ printf("\r");
+ else
+ printf("\n");
if (key->kernstack == -EEXIST && !warned) {
printf("stackmap collisions seen. Consider increasing size\n");
@@ -105,7 +108,7 @@ static void print_stacks(void)
bpf_map_delete_elem(fd, &next_key);
key = next_key;
}
-
+ printf("\n");
if (!sys_read_seen || !sys_write_seen) {
printf("BUG kernel stack doesn't contain sys_read() and sys_write()\n");
int_exit(0);
@@ -122,24 +125,29 @@ static void test_perf_event_all_cpu(struct perf_event_attr *attr)
{
int nr_cpus = sysconf(_SC_NPROCESSORS_CONF);
int *pmu_fd = malloc(nr_cpus * sizeof(int));
- int i;
+ int i, error = 0;
/* open perf_event on all cpus */
for (i = 0; i < nr_cpus; i++) {
pmu_fd[i] = sys_perf_event_open(attr, -1, i, -1, 0);
if (pmu_fd[i] < 0) {
printf("sys_perf_event_open failed\n");
+ error = 1;
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_ENABLE, 0) == 0);
+ assert(ioctl(pmu_fd[i], PERF_EVENT_IOC_ENABLE) == 0);
}
- system("dd if=/dev/zero of=/dev/null count=5000k");
+ system("dd if=/dev/zero of=/dev/null count=5000k status=none");
print_stacks();
all_cpu_err:
- for (i--; i >= 0; i--)
+ for (i--; i >= 0; i--) {
+ ioctl(pmu_fd[i], PERF_EVENT_IOC_DISABLE);
close(pmu_fd[i]);
+ }
free(pmu_fd);
+ if (error)
+ int_exit(0);
}
static void test_perf_event_task(struct perf_event_attr *attr)
@@ -150,12 +158,13 @@ static void test_perf_event_task(struct perf_event_attr *attr)
pmu_fd = sys_perf_event_open(attr, 0, -1, -1, 0);
if (pmu_fd < 0) {
printf("sys_perf_event_open failed\n");
- return;
+ int_exit(0);
}
assert(ioctl(pmu_fd, PERF_EVENT_IOC_SET_BPF, prog_fd[0]) == 0);
- assert(ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0) == 0);
- system("dd if=/dev/zero of=/dev/null count=5000k");
+ assert(ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE) == 0);
+ system("dd if=/dev/zero of=/dev/null count=5000k status=none");
print_stacks();
+ ioctl(pmu_fd, PERF_EVENT_IOC_DISABLE);
close(pmu_fd);
}
@@ -175,11 +184,56 @@ static void test_bpf_perf_event(void)
.config = PERF_COUNT_SW_CPU_CLOCK,
.inherit = 1,
};
+ struct perf_event_attr attr_hw_cache_l1d = {
+ .sample_freq = SAMPLE_FREQ,
+ .freq = 1,
+ .type = PERF_TYPE_HW_CACHE,
+ .config =
+ PERF_COUNT_HW_CACHE_L1D |
+ (PERF_COUNT_HW_CACHE_OP_READ << 8) |
+ (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16),
+ .inherit = 1,
+ };
+ struct perf_event_attr attr_hw_cache_branch_miss = {
+ .sample_freq = SAMPLE_FREQ,
+ .freq = 1,
+ .type = PERF_TYPE_HW_CACHE,
+ .config =
+ PERF_COUNT_HW_CACHE_BPU |
+ (PERF_COUNT_HW_CACHE_OP_READ << 8) |
+ (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
+ .inherit = 1,
+ };
+ struct perf_event_attr attr_type_raw = {
+ .sample_freq = SAMPLE_FREQ,
+ .freq = 1,
+ .type = PERF_TYPE_RAW,
+ /* Intel Instruction Retired */
+ .config = 0xc0,
+ .inherit = 1,
+ };
+ printf("Test HW_CPU_CYCLES\n");
test_perf_event_all_cpu(&attr_type_hw);
test_perf_event_task(&attr_type_hw);
+
+ printf("Test SW_CPU_CLOCK\n");
test_perf_event_all_cpu(&attr_type_sw);
test_perf_event_task(&attr_type_sw);
+
+ printf("Test HW_CACHE_L1D\n");
+ test_perf_event_all_cpu(&attr_hw_cache_l1d);
+ test_perf_event_task(&attr_hw_cache_l1d);
+
+ printf("Test HW_CACHE_BPU\n");
+ test_perf_event_all_cpu(&attr_hw_cache_branch_miss);
+ test_perf_event_task(&attr_hw_cache_branch_miss);
+
+ printf("Test Instruction Retired\n");
+ test_perf_event_all_cpu(&attr_type_raw);
+ test_perf_event_task(&attr_type_raw);
+
+ printf("*** PASS ***\n");
}
@@ -209,7 +263,6 @@ int main(int argc, char **argv)
return 0;
}
test_bpf_perf_event();
-
int_exit(0);
return 0;
}
diff --git a/samples/bpf/tracex5_kern.c b/samples/bpf/tracex5_kern.c
index 7e4cf74553ff..f57f4e1ea1ec 100644
--- a/samples/bpf/tracex5_kern.c
+++ b/samples/bpf/tracex5_kern.c
@@ -9,6 +9,7 @@
#include <uapi/linux/bpf.h>
#include <uapi/linux/seccomp.h>
#include <uapi/linux/unistd.h>
+#include "syscall_nrs.h"
#include "bpf_helpers.h"
#define PROG(F) SEC("kprobe/"__stringify(F)) int bpf_func_##F
@@ -17,7 +18,11 @@ struct bpf_map_def SEC("maps") progs = {
.type = BPF_MAP_TYPE_PROG_ARRAY,
.key_size = sizeof(u32),
.value_size = sizeof(u32),
+#ifdef __mips__
+ .max_entries = 6000, /* MIPS n64 syscalls start at 5000 */
+#else
.max_entries = 1024,
+#endif
};
SEC("kprobe/__seccomp_filter")
@@ -37,7 +42,7 @@ int bpf_prog1(struct pt_regs *ctx)
}
/* we jump here when syscall number == __NR_write */
-PROG(__NR_write)(struct pt_regs *ctx)
+PROG(SYS__NR_write)(struct pt_regs *ctx)
{
struct seccomp_data sd;
@@ -50,7 +55,7 @@ PROG(__NR_write)(struct pt_regs *ctx)
return 0;
}
-PROG(__NR_read)(struct pt_regs *ctx)
+PROG(SYS__NR_read)(struct pt_regs *ctx)
{
struct seccomp_data sd;
@@ -63,7 +68,7 @@ PROG(__NR_read)(struct pt_regs *ctx)
return 0;
}
-PROG(__NR_mmap)(struct pt_regs *ctx)
+PROG(SYS__NR_mmap)(struct pt_regs *ctx)
{
char fmt[] = "mmap\n";
bpf_trace_printk(fmt, sizeof(fmt));
diff --git a/samples/bpf/tracex6_kern.c b/samples/bpf/tracex6_kern.c
index be479c4af9e2..e7d180305974 100644
--- a/samples/bpf/tracex6_kern.c
+++ b/samples/bpf/tracex6_kern.c
@@ -3,22 +3,36 @@
#include <uapi/linux/bpf.h>
#include "bpf_helpers.h"
-struct bpf_map_def SEC("maps") my_map = {
+struct bpf_map_def SEC("maps") counters = {
.type = BPF_MAP_TYPE_PERF_EVENT_ARRAY,
.key_size = sizeof(int),
.value_size = sizeof(u32),
- .max_entries = 32,
+ .max_entries = 64,
+};
+struct bpf_map_def SEC("maps") values = {
+ .type = BPF_MAP_TYPE_HASH,
+ .key_size = sizeof(int),
+ .value_size = sizeof(u64),
+ .max_entries = 64,
};
-SEC("kprobe/sys_write")
+SEC("kprobe/htab_map_get_next_key")
int bpf_prog1(struct pt_regs *ctx)
{
- u64 count;
u32 key = bpf_get_smp_processor_id();
- char fmt[] = "CPU-%d %llu\n";
+ u64 count, *val;
+ s64 error;
+
+ count = bpf_perf_event_read(&counters, key);
+ error = (s64)count;
+ if (error <= -2 && error >= -22)
+ return 0;
- count = bpf_perf_event_read(&my_map, key);
- bpf_trace_printk(fmt, sizeof(fmt), key, count);
+ val = bpf_map_lookup_elem(&values, &key);
+ if (val)
+ *val = count;
+ else
+ bpf_map_update_elem(&values, &key, &count, BPF_NOEXIST);
return 0;
}
diff --git a/samples/bpf/tracex6_user.c b/samples/bpf/tracex6_user.c
index ca7874ed77f4..a05a99a0752f 100644
--- a/samples/bpf/tracex6_user.c
+++ b/samples/bpf/tracex6_user.c
@@ -1,73 +1,177 @@
-#include <stdio.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <stdbool.h>
-#include <string.h>
+#define _GNU_SOURCE
+
+#include <assert.h>
#include <fcntl.h>
-#include <poll.h>
-#include <sys/ioctl.h>
#include <linux/perf_event.h>
#include <linux/bpf.h>
-#include "libbpf.h"
+#include <sched.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/ioctl.h>
+#include <sys/resource.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
#include "bpf_load.h"
+#include "libbpf.h"
#include "perf-sys.h"
#define SAMPLE_PERIOD 0x7fffffffffffffffULL
-static void test_bpf_perf_event(void)
+static void check_on_cpu(int cpu, struct perf_event_attr *attr)
{
- int nr_cpus = sysconf(_SC_NPROCESSORS_CONF);
- int *pmu_fd = malloc(nr_cpus * sizeof(int));
- int status, i;
+ int pmu_fd, error = 0;
+ cpu_set_t set;
+ __u64 value;
- struct perf_event_attr attr_insn_pmu = {
+ /* Move to target CPU */
+ CPU_ZERO(&set);
+ CPU_SET(cpu, &set);
+ assert(sched_setaffinity(0, sizeof(set), &set) == 0);
+ /* Open perf event and attach to the perf_event_array */
+ pmu_fd = sys_perf_event_open(attr, -1/*pid*/, cpu/*cpu*/, -1/*group_fd*/, 0);
+ if (pmu_fd < 0) {
+ fprintf(stderr, "sys_perf_event_open failed on CPU %d\n", cpu);
+ error = 1;
+ goto on_exit;
+ }
+ assert(bpf_map_update_elem(map_fd[0], &cpu, &pmu_fd, BPF_ANY) == 0);
+ assert(ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0) == 0);
+ /* Trigger the kprobe */
+ bpf_map_get_next_key(map_fd[1], &cpu, NULL);
+ /* Check the value */
+ if (bpf_map_lookup_elem(map_fd[1], &cpu, &value)) {
+ fprintf(stderr, "Value missing for CPU %d\n", cpu);
+ error = 1;
+ goto on_exit;
+ }
+ fprintf(stderr, "CPU %d: %llu\n", cpu, value);
+
+on_exit:
+ assert(bpf_map_delete_elem(map_fd[0], &cpu) == 0 || error);
+ assert(ioctl(pmu_fd, PERF_EVENT_IOC_DISABLE, 0) == 0 || error);
+ assert(close(pmu_fd) == 0 || error);
+ assert(bpf_map_delete_elem(map_fd[1], &cpu) == 0 || error);
+ exit(error);
+}
+
+static void test_perf_event_array(struct perf_event_attr *attr,
+ const char *name)
+{
+ int i, status, nr_cpus = sysconf(_SC_NPROCESSORS_CONF);
+ pid_t pid[nr_cpus];
+ int err = 0;
+
+ printf("Test reading %s counters\n", name);
+
+ for (i = 0; i < nr_cpus; i++) {
+ pid[i] = fork();
+ assert(pid[i] >= 0);
+ if (pid[i] == 0) {
+ check_on_cpu(i, attr);
+ exit(1);
+ }
+ }
+
+ for (i = 0; i < nr_cpus; i++) {
+ assert(waitpid(pid[i], &status, 0) == pid[i]);
+ err |= status;
+ }
+
+ if (err)
+ printf("Test: %s FAILED\n", name);
+}
+
+static void test_bpf_perf_event(void)
+{
+ struct perf_event_attr attr_cycles = {
.freq = 0,
.sample_period = SAMPLE_PERIOD,
.inherit = 0,
.type = PERF_TYPE_HARDWARE,
.read_format = 0,
.sample_type = 0,
- .config = 0,/* PMU: cycles */
+ .config = PERF_COUNT_HW_CPU_CYCLES,
+ };
+ struct perf_event_attr attr_clock = {
+ .freq = 0,
+ .sample_period = SAMPLE_PERIOD,
+ .inherit = 0,
+ .type = PERF_TYPE_SOFTWARE,
+ .read_format = 0,
+ .sample_type = 0,
+ .config = PERF_COUNT_SW_CPU_CLOCK,
+ };
+ struct perf_event_attr attr_raw = {
+ .freq = 0,
+ .sample_period = SAMPLE_PERIOD,
+ .inherit = 0,
+ .type = PERF_TYPE_RAW,
+ .read_format = 0,
+ .sample_type = 0,
+ /* Intel Instruction Retired */
+ .config = 0xc0,
+ };
+ struct perf_event_attr attr_l1d_load = {
+ .freq = 0,
+ .sample_period = SAMPLE_PERIOD,
+ .inherit = 0,
+ .type = PERF_TYPE_HW_CACHE,
+ .read_format = 0,
+ .sample_type = 0,
+ .config =
+ PERF_COUNT_HW_CACHE_L1D |
+ (PERF_COUNT_HW_CACHE_OP_READ << 8) |
+ (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16),
+ };
+ struct perf_event_attr attr_llc_miss = {
+ .freq = 0,
+ .sample_period = SAMPLE_PERIOD,
+ .inherit = 0,
+ .type = PERF_TYPE_HW_CACHE,
+ .read_format = 0,
+ .sample_type = 0,
+ .config =
+ PERF_COUNT_HW_CACHE_LL |
+ (PERF_COUNT_HW_CACHE_OP_READ << 8) |
+ (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
+ };
+ struct perf_event_attr attr_msr_tsc = {
+ .freq = 0,
+ .sample_period = 0,
+ .inherit = 0,
+ /* From /sys/bus/event_source/devices/msr/ */
+ .type = 7,
+ .read_format = 0,
+ .sample_type = 0,
+ .config = 0,
};
- for (i = 0; i < nr_cpus; i++) {
- pmu_fd[i] = sys_perf_event_open(&attr_insn_pmu, -1/*pid*/, i/*cpu*/, -1/*group_fd*/, 0);
- if (pmu_fd[i] < 0) {
- printf("event syscall failed\n");
- goto exit;
- }
-
- bpf_map_update_elem(map_fd[0], &i, &pmu_fd[i], BPF_ANY);
- ioctl(pmu_fd[i], PERF_EVENT_IOC_ENABLE, 0);
- }
+ test_perf_event_array(&attr_cycles, "HARDWARE-cycles");
+ test_perf_event_array(&attr_clock, "SOFTWARE-clock");
+ test_perf_event_array(&attr_raw, "RAW-instruction-retired");
+ test_perf_event_array(&attr_l1d_load, "HW_CACHE-L1D-load");
- status = system("ls > /dev/null");
- if (status)
- goto exit;
- status = system("sleep 2");
- if (status)
- goto exit;
-
-exit:
- for (i = 0; i < nr_cpus; i++)
- close(pmu_fd[i]);
- close(map_fd[0]);
- free(pmu_fd);
+ /* below tests may fail in qemu */
+ test_perf_event_array(&attr_llc_miss, "HW_CACHE-LLC-miss");
+ test_perf_event_array(&attr_msr_tsc, "Dynamic-msr-tsc");
}
int main(int argc, char **argv)
{
+ struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
char filename[256];
snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
+ setrlimit(RLIMIT_MEMLOCK, &r);
if (load_bpf_file(filename)) {
printf("%s", bpf_log_buf);
return 1;
}
test_bpf_perf_event();
- read_trace_pipe();
-
return 0;
}
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-19 09:22:52 +0000