diff options
Diffstat (limited to 'samples/bpf')
| -rw-r--r-- | samples/bpf/Makefile | 68 | ||||
| -rw-r--r-- | samples/bpf/README.rst | 4 | ||||
| -rw-r--r-- | samples/bpf/bpf_load.c | 3 | ||||
| -rw-r--r-- | samples/bpf/fds_example.c | 3 | ||||
| -rw-r--r-- | samples/bpf/libbpf.c | 111 | ||||
| -rw-r--r-- | samples/bpf/libbpf.h | 19 | ||||
| -rw-r--r-- | samples/bpf/sock_example.c | 3 | ||||
| -rw-r--r-- | samples/bpf/test_cgrp2_attach.c | 3 | ||||
| -rw-r--r-- | samples/bpf/test_cgrp2_attach2.c | 3 | ||||
| -rw-r--r-- | samples/bpf/test_cgrp2_sock.c | 3 |
10 files changed, 52 insertions, 168 deletions
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index f2219c1489e5..81b0ef2f7994 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -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 diff --git a/samples/bpf/README.rst b/samples/bpf/README.rst index a43eae3f0551..79f9a58f1872 100644 --- a/samples/bpf/README.rst +++ b/samples/bpf/README.rst @@ -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 ================== diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c index f5b186c46b7c..1bfb43394013 100644 --- a/samples/bpf/bpf_load.c +++ b/samples/bpf/bpf_load.c @@ -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); diff --git a/samples/bpf/fds_example.c b/samples/bpf/fds_example.c index 8a4fc4ef3993..6245062844d1 100644 --- a/samples/bpf/fds_example.c +++ b/samples/bpf/fds_example.c @@ -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); } } diff --git a/samples/bpf/libbpf.c b/samples/bpf/libbpf.c index 6f076abdca35..3391225ad7e9 100644 --- a/samples/bpf/libbpf.c +++ b/samples/bpf/libbpf.c @@ -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; diff --git a/samples/bpf/libbpf.h b/samples/bpf/libbpf.h index 20e3457857ca..cf7d2386d1f9 100644 --- a/samples/bpf/libbpf.h +++ b/samples/bpf/libbpf.h @@ -2,28 +2,13 @@ #ifndef __LIBBPF_H #define __LIBBPF_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); +#include <bpf/bpf.h> -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); +struct bpf_insn; 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) \ diff --git a/samples/bpf/sock_example.c b/samples/bpf/sock_example.c index d6b91e9a38ad..5546f8aac37e 100644 --- a/samples/bpf/sock_example.c +++ b/samples/bpf/sock_example.c @@ -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)); diff --git a/samples/bpf/test_cgrp2_attach.c b/samples/bpf/test_cgrp2_attach.c index 8283ef86d392..504058631ffc 100644 --- a/samples/bpf/test_cgrp2_attach.c +++ b/samples/bpf/test_cgrp2_attach.c @@ -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); } diff --git a/samples/bpf/test_cgrp2_attach2.c b/samples/bpf/test_cgrp2_attach2.c index fc6092fdc3b0..6e69be37f87f 100644 --- a/samples/bpf/test_cgrp2_attach2.c +++ b/samples/bpf/test_cgrp2_attach2.c @@ -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) { diff --git a/samples/bpf/test_cgrp2_sock.c b/samples/bpf/test_cgrp2_sock.c index 43b4bde5d05c..0791b949cbe4 100644 --- a/samples/bpf/test_cgrp2_sock.c +++ b/samples/bpf/test_cgrp2_sock.c @@ -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); } |