diff options
Diffstat (limited to 'tools/testing')
-rw-r--r-- | tools/testing/selftests/bpf/Makefile | 24 | ||||
-rw-r--r-- | tools/testing/selftests/bpf/bpf_flow.c | 2 | ||||
-rw-r--r-- | tools/testing/selftests/bpf/connect4_prog.c | 43 | ||||
-rw-r--r-- | tools/testing/selftests/bpf/connect6_prog.c | 56 | ||||
-rw-r--r-- | tools/testing/selftests/bpf/test_btf.c | 923 | ||||
-rw-r--r-- | tools/testing/selftests/bpf/test_btf_haskv.c | 16 | ||||
-rw-r--r-- | tools/testing/selftests/bpf/test_btf_nokv.c | 16 | ||||
-rwxr-xr-x | tools/testing/selftests/bpf/test_flow_dissector.sh | 2 | ||||
-rwxr-xr-x | tools/testing/selftests/bpf/test_libbpf.sh | 14 | ||||
-rw-r--r-- | tools/testing/selftests/bpf/test_map_in_map.c | 49 | ||||
-rw-r--r-- | tools/testing/selftests/bpf/test_maps.c | 154 | ||||
-rw-r--r-- | tools/testing/selftests/bpf/test_progs.c | 2 | ||||
-rw-r--r-- | tools/testing/selftests/bpf/test_sock_addr.c | 28 | ||||
-rw-r--r-- | tools/testing/selftests/bpf/test_tcpnotify.h | 19 | ||||
-rw-r--r-- | tools/testing/selftests/bpf/test_tcpnotify_kern.c | 95 | ||||
-rw-r--r-- | tools/testing/selftests/bpf/test_tcpnotify_user.c | 186 | ||||
-rw-r--r-- | tools/testing/selftests/bpf/test_verifier.c | 77 |
17 files changed, 1629 insertions, 77 deletions
diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index 4a54236475ae..73aa6d8f4a2f 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -24,12 +24,13 @@ TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test test_align test_verifier_log test_dev_cgroup test_tcpbpf_user \ test_sock test_btf test_sockmap test_lirc_mode2_user get_cgroup_id_user \ test_socket_cookie test_cgroup_storage test_select_reuseport test_section_names \ - test_netcnt + test_netcnt test_tcpnotify_user TEST_GEN_FILES = test_pkt_access.o test_xdp.o test_l4lb.o test_tcp_estats.o test_obj_id.o \ test_pkt_md_access.o test_xdp_redirect.o test_xdp_meta.o sockmap_parse_prog.o \ sockmap_verdict_prog.o dev_cgroup.o sample_ret0.o test_tracepoint.o \ test_l4lb_noinline.o test_xdp_noinline.o test_stacktrace_map.o \ + test_tcpnotify_kern.o \ sample_map_ret0.o test_tcpbpf_kern.o test_stacktrace_build_id.o \ sockmap_tcp_msg_prog.o connect4_prog.o connect6_prog.o test_adjust_tail.o \ test_btf_haskv.o test_btf_nokv.o test_sockmap_kern.o test_tunnel_kern.o \ @@ -38,7 +39,7 @@ TEST_GEN_FILES = test_pkt_access.o test_xdp.o test_l4lb.o test_tcp_estats.o test get_cgroup_id_kern.o socket_cookie_prog.o test_select_reuseport_kern.o \ test_skb_cgroup_id_kern.o bpf_flow.o netcnt_prog.o \ test_sk_lookup_kern.o test_xdp_vlan.o test_queue_map.o test_stack_map.o \ - xdp_dummy.o + xdp_dummy.o test_map_in_map.o # Order correspond to 'make run_tests' order TEST_PROGS := test_kmod.sh \ @@ -75,6 +76,7 @@ $(OUTPUT)/test_sock_addr: cgroup_helpers.c $(OUTPUT)/test_socket_cookie: cgroup_helpers.c $(OUTPUT)/test_sockmap: cgroup_helpers.c $(OUTPUT)/test_tcpbpf_user: cgroup_helpers.c +$(OUTPUT)/test_tcpnotify_user: cgroup_helpers.c trace_helpers.c $(OUTPUT)/test_progs: trace_helpers.c $(OUTPUT)/get_cgroup_id_user: cgroup_helpers.c $(OUTPUT)/test_cgroup_storage: cgroup_helpers.c @@ -125,7 +127,14 @@ $(OUTPUT)/test_stack_map.o: test_queue_stack_map.h BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris) BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF) BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm') +BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \ + $(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \ + readelf -S ./llvm_btf_verify.o | grep BTF; \ + /bin/rm -f ./llvm_btf_verify.o) +ifneq ($(BTF_LLVM_PROBE),) + CLANG_FLAGS += -g +else ifneq ($(BTF_LLC_PROBE),) ifneq ($(BTF_PAHOLE_PROBE),) ifneq ($(BTF_OBJCOPY_PROBE),) @@ -135,6 +144,17 @@ ifneq ($(BTF_OBJCOPY_PROBE),) endif endif endif +endif + +# Have one program compiled without "-target bpf" to test whether libbpf loads +# it successfully +$(OUTPUT)/test_xdp.o: test_xdp.c + $(CLANG) $(CLANG_FLAGS) \ + -O2 -emit-llvm -c $< -o - | \ + $(LLC) -march=bpf -mcpu=$(CPU) $(LLC_FLAGS) -filetype=obj -o $@ +ifeq ($(DWARF2BTF),y) + $(BTF_PAHOLE) -J $@ +endif $(OUTPUT)/%.o: %.c $(CLANG) $(CLANG_FLAGS) \ diff --git a/tools/testing/selftests/bpf/bpf_flow.c b/tools/testing/selftests/bpf/bpf_flow.c index 107350a7821d..b9798f558ca7 100644 --- a/tools/testing/selftests/bpf/bpf_flow.c +++ b/tools/testing/selftests/bpf/bpf_flow.c @@ -116,7 +116,7 @@ static __always_inline int parse_eth_proto(struct __sk_buff *skb, __be16 proto) return BPF_DROP; } -SEC("dissect") +SEC("flow_dissector") int _dissect(struct __sk_buff *skb) { if (!skb->vlan_present) diff --git a/tools/testing/selftests/bpf/connect4_prog.c b/tools/testing/selftests/bpf/connect4_prog.c index 5a88a681d2ab..b8395f3c43e9 100644 --- a/tools/testing/selftests/bpf/connect4_prog.c +++ b/tools/testing/selftests/bpf/connect4_prog.c @@ -21,23 +21,48 @@ int _version SEC("version") = 1; SEC("cgroup/connect4") int connect_v4_prog(struct bpf_sock_addr *ctx) { + struct bpf_sock_tuple tuple = {}; struct sockaddr_in sa; + struct bpf_sock *sk; + + /* Verify that new destination is available. */ + memset(&tuple.ipv4.saddr, 0, sizeof(tuple.ipv4.saddr)); + memset(&tuple.ipv4.sport, 0, sizeof(tuple.ipv4.sport)); + + tuple.ipv4.daddr = bpf_htonl(DST_REWRITE_IP4); + tuple.ipv4.dport = bpf_htons(DST_REWRITE_PORT4); + + if (ctx->type != SOCK_STREAM && ctx->type != SOCK_DGRAM) + return 0; + else if (ctx->type == SOCK_STREAM) + sk = bpf_sk_lookup_tcp(ctx, &tuple, sizeof(tuple.ipv4), 0, 0); + else + sk = bpf_sk_lookup_udp(ctx, &tuple, sizeof(tuple.ipv4), 0, 0); + + if (!sk) + return 0; + + if (sk->src_ip4 != tuple.ipv4.daddr || + sk->src_port != DST_REWRITE_PORT4) { + bpf_sk_release(sk); + return 0; + } + + bpf_sk_release(sk); /* Rewrite destination. */ ctx->user_ip4 = bpf_htonl(DST_REWRITE_IP4); ctx->user_port = bpf_htons(DST_REWRITE_PORT4); - if (ctx->type == SOCK_DGRAM || ctx->type == SOCK_STREAM) { - ///* Rewrite source. */ - memset(&sa, 0, sizeof(sa)); + /* Rewrite source. */ + memset(&sa, 0, sizeof(sa)); - sa.sin_family = AF_INET; - sa.sin_port = bpf_htons(0); - sa.sin_addr.s_addr = bpf_htonl(SRC_REWRITE_IP4); + sa.sin_family = AF_INET; + sa.sin_port = bpf_htons(0); + sa.sin_addr.s_addr = bpf_htonl(SRC_REWRITE_IP4); - if (bpf_bind(ctx, (struct sockaddr *)&sa, sizeof(sa)) != 0) - return 0; - } + if (bpf_bind(ctx, (struct sockaddr *)&sa, sizeof(sa)) != 0) + return 0; return 1; } diff --git a/tools/testing/selftests/bpf/connect6_prog.c b/tools/testing/selftests/bpf/connect6_prog.c index 8ea3f7d12dee..25f5dc7b7aa0 100644 --- a/tools/testing/selftests/bpf/connect6_prog.c +++ b/tools/testing/selftests/bpf/connect6_prog.c @@ -29,7 +29,41 @@ int _version SEC("version") = 1; SEC("cgroup/connect6") int connect_v6_prog(struct bpf_sock_addr *ctx) { + struct bpf_sock_tuple tuple = {}; struct sockaddr_in6 sa; + struct bpf_sock *sk; + + /* Verify that new destination is available. */ + memset(&tuple.ipv6.saddr, 0, sizeof(tuple.ipv6.saddr)); + memset(&tuple.ipv6.sport, 0, sizeof(tuple.ipv6.sport)); + + tuple.ipv6.daddr[0] = bpf_htonl(DST_REWRITE_IP6_0); + tuple.ipv6.daddr[1] = bpf_htonl(DST_REWRITE_IP6_1); + tuple.ipv6.daddr[2] = bpf_htonl(DST_REWRITE_IP6_2); + tuple.ipv6.daddr[3] = bpf_htonl(DST_REWRITE_IP6_3); + + tuple.ipv6.dport = bpf_htons(DST_REWRITE_PORT6); + + if (ctx->type != SOCK_STREAM && ctx->type != SOCK_DGRAM) + return 0; + else if (ctx->type == SOCK_STREAM) + sk = bpf_sk_lookup_tcp(ctx, &tuple, sizeof(tuple.ipv6), 0, 0); + else + sk = bpf_sk_lookup_udp(ctx, &tuple, sizeof(tuple.ipv6), 0, 0); + + if (!sk) + return 0; + + if (sk->src_ip6[0] != tuple.ipv6.daddr[0] || + sk->src_ip6[1] != tuple.ipv6.daddr[1] || + sk->src_ip6[2] != tuple.ipv6.daddr[2] || + sk->src_ip6[3] != tuple.ipv6.daddr[3] || + sk->src_port != DST_REWRITE_PORT6) { + bpf_sk_release(sk); + return 0; + } + + bpf_sk_release(sk); /* Rewrite destination. */ ctx->user_ip6[0] = bpf_htonl(DST_REWRITE_IP6_0); @@ -39,21 +73,19 @@ int connect_v6_prog(struct bpf_sock_addr *ctx) ctx->user_port = bpf_htons(DST_REWRITE_PORT6); - if (ctx->type == SOCK_DGRAM || ctx->type == SOCK_STREAM) { - /* Rewrite source. */ - memset(&sa, 0, sizeof(sa)); + /* Rewrite source. */ + memset(&sa, 0, sizeof(sa)); - sa.sin6_family = AF_INET6; - sa.sin6_port = bpf_htons(0); + sa.sin6_family = AF_INET6; + sa.sin6_port = bpf_htons(0); - sa.sin6_addr.s6_addr32[0] = bpf_htonl(SRC_REWRITE_IP6_0); - sa.sin6_addr.s6_addr32[1] = bpf_htonl(SRC_REWRITE_IP6_1); - sa.sin6_addr.s6_addr32[2] = bpf_htonl(SRC_REWRITE_IP6_2); - sa.sin6_addr.s6_addr32[3] = bpf_htonl(SRC_REWRITE_IP6_3); + sa.sin6_addr.s6_addr32[0] = bpf_htonl(SRC_REWRITE_IP6_0); + sa.sin6_addr.s6_addr32[1] = bpf_htonl(SRC_REWRITE_IP6_1); + sa.sin6_addr.s6_addr32[2] = bpf_htonl(SRC_REWRITE_IP6_2); + sa.sin6_addr.s6_addr32[3] = bpf_htonl(SRC_REWRITE_IP6_3); - if (bpf_bind(ctx, (struct sockaddr *)&sa, sizeof(sa)) != 0) - return 0; - } + if (bpf_bind(ctx, (struct sockaddr *)&sa, sizeof(sa)) != 0) + return 0; return 1; } diff --git a/tools/testing/selftests/bpf/test_btf.c b/tools/testing/selftests/bpf/test_btf.c index f42b3396d622..bcbda7037840 100644 --- a/tools/testing/selftests/bpf/test_btf.c +++ b/tools/testing/selftests/bpf/test_btf.c @@ -5,6 +5,7 @@ #include <linux/btf.h> #include <linux/err.h> #include <linux/kernel.h> +#include <linux/filter.h> #include <bpf/bpf.h> #include <sys/resource.h> #include <libelf.h> @@ -22,9 +23,13 @@ #include "bpf_rlimit.h" #include "bpf_util.h" +#define MAX_INSNS 512 +#define MAX_SUBPROGS 16 + static uint32_t pass_cnt; static uint32_t error_cnt; static uint32_t skip_cnt; +static bool jit_enabled; #define CHECK(condition, format...) ({ \ int __ret = !!(condition); \ @@ -60,6 +65,24 @@ static int __base_pr(const char *format, ...) return err; } +static bool is_jit_enabled(void) +{ + const char *jit_sysctl = "/proc/sys/net/core/bpf_jit_enable"; + bool enabled = false; + int sysctl_fd; + + sysctl_fd = open(jit_sysctl, 0, O_RDONLY); + if (sysctl_fd != -1) { + char tmpc; + + if (read(sysctl_fd, &tmpc, sizeof(tmpc)) == 1) + enabled = (tmpc != '0'); + close(sysctl_fd); + } + + return enabled; +} + #define BTF_INFO_ENC(kind, root, vlen) \ ((!!(root) << 31) | ((kind) << 24) | ((vlen) & BTF_MAX_VLEN)) @@ -85,8 +108,20 @@ static int __base_pr(const char *format, ...) #define BTF_TYPEDEF_ENC(name, type) \ BTF_TYPE_ENC(name, BTF_INFO_ENC(BTF_KIND_TYPEDEF, 0, 0), type) -#define BTF_PTR_ENC(name, type) \ - BTF_TYPE_ENC(name, BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), type) +#define BTF_PTR_ENC(type) \ + BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), type) + +#define BTF_CONST_ENC(type) \ + BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), type) + +#define BTF_FUNC_PROTO_ENC(ret_type, nargs) \ + BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_FUNC_PROTO, 0, nargs), ret_type) + +#define BTF_FUNC_PROTO_ARG_ENC(name, type) \ + (name), (type) + +#define BTF_FUNC_ENC(name, func_proto) \ + BTF_TYPE_ENC(name, BTF_INFO_ENC(BTF_KIND_FUNC, 0, 0), func_proto) #define BTF_END_RAW 0xdeadbeef #define NAME_TBD 0xdeadb33f @@ -103,6 +138,7 @@ static struct args { bool get_info_test; bool pprint_test; bool always_log; + bool func_type_test; } args; static char btf_log_buf[BTF_LOG_BUF_SIZE]; @@ -1374,6 +1410,464 @@ static struct btf_raw_test raw_tests[] = { .map_create_err = true, }, +{ + .descr = "func proto (int (*)(int, unsigned int))", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* int (*)(int, unsigned int) */ + BTF_FUNC_PROTO_ENC(1, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(0, 1), + BTF_FUNC_PROTO_ARG_ENC(0, 2), + BTF_END_RAW, + }, + .str_sec = "", + .str_sec_size = sizeof(""), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, +}, + +{ + .descr = "func proto (vararg)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(int, unsigned int, ...) */ + BTF_FUNC_PROTO_ENC(0, 3), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(0, 1), + BTF_FUNC_PROTO_ARG_ENC(0, 2), + BTF_FUNC_PROTO_ARG_ENC(0, 0), + BTF_END_RAW, + }, + .str_sec = "", + .str_sec_size = sizeof(""), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, +}, + +{ + .descr = "func proto (vararg with name)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(int a, unsigned int b, ... c) */ + BTF_FUNC_PROTO_ENC(0, 3), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 0), + BTF_END_RAW, + }, + .str_sec = "\0a\0b\0c", + .str_sec_size = sizeof("\0a\0b\0c"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid arg#3", +}, + +{ + .descr = "func proto (arg after vararg)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(int a, ..., unsigned int b) */ + BTF_FUNC_PROTO_ENC(0, 3), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(0, 0), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_END_RAW, + }, + .str_sec = "\0a\0b", + .str_sec_size = sizeof("\0a\0b"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid arg#2", +}, + +{ + .descr = "func proto (CONST=>TYPEDEF=>PTR=>FUNC_PROTO)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* typedef void (*func_ptr)(int, unsigned int) */ + BTF_TYPEDEF_ENC(NAME_TBD, 5), /* [3] */ + /* const func_ptr */ + BTF_CONST_ENC(3), /* [4] */ + BTF_PTR_ENC(6), /* [5] */ + BTF_FUNC_PROTO_ENC(0, 2), /* [6] */ + BTF_FUNC_PROTO_ARG_ENC(0, 1), + BTF_FUNC_PROTO_ARG_ENC(0, 2), + BTF_END_RAW, + }, + .str_sec = "\0func_ptr", + .str_sec_size = sizeof("\0func_ptr"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, +}, + +{ + .descr = "func proto (CONST=>TYPEDEF=>FUNC_PROTO)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + BTF_CONST_ENC(4), /* [3] */ + BTF_TYPEDEF_ENC(NAME_TBD, 5), /* [4] */ + BTF_FUNC_PROTO_ENC(0, 2), /* [5] */ + BTF_FUNC_PROTO_ARG_ENC(0, 1), + BTF_FUNC_PROTO_ARG_ENC(0, 2), + BTF_END_RAW, + }, + .str_sec = "\0func_typedef", + .str_sec_size = sizeof("\0func_typedef"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid type_id", +}, + +{ + .descr = "func proto (btf_resolve(arg))", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + /* void (*)(const void *) */ + BTF_FUNC_PROTO_ENC(0, 1), /* [2] */ + BTF_FUNC_PROTO_ARG_ENC(0, 3), + BTF_CONST_ENC(4), /* [3] */ + BTF_PTR_ENC(0), /* [4] */ + BTF_END_RAW, + }, + .str_sec = "", + .str_sec_size = sizeof(""), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, +}, + +{ + .descr = "func proto (Not all arg has name)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(int, unsigned int b) */ + BTF_FUNC_PROTO_ENC(0, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(0, 1), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_END_RAW, + }, + .str_sec = "\0b", + .str_sec_size = sizeof("\0b"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, +}, + +{ + .descr = "func proto (Bad arg name_off)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(int a, unsigned int <bad_name_off>) */ + BTF_FUNC_PROTO_ENC(0, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(0xffffffff, 2), + BTF_END_RAW, + }, + .str_sec = "\0a", + .str_sec_size = sizeof("\0a"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid arg#2", +}, + +{ + .descr = "func proto (Bad arg name)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(int a, unsigned int !!!) */ + BTF_FUNC_PROTO_ENC(0, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_END_RAW, + }, + .str_sec = "\0a\0!!!", + .str_sec_size = sizeof("\0a\0!!!"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid arg#2", +}, + +{ + .descr = "func proto (Invalid return type)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* <bad_ret_type> (*)(int, unsigned int) */ + BTF_FUNC_PROTO_ENC(100, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(0, 1), + BTF_FUNC_PROTO_ARG_ENC(0, 2), + BTF_END_RAW, + }, + .str_sec = "", + .str_sec_size = sizeof(""), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid return type", +}, + +{ + .descr = "func proto (with func name)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void func_proto(int, unsigned int) */ + BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_FUNC_PROTO, 0, 2), 0), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(0, 1), + BTF_FUNC_PROTO_ARG_ENC(0, 2), + BTF_END_RAW, + }, + .str_sec = "\0func_proto", + .str_sec_size = sizeof("\0func_proto"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid name", +}, + +{ + .descr = "func proto (const void arg)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(const void) */ + BTF_FUNC_PROTO_ENC(0, 1), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(0, 4), + BTF_CONST_ENC(0), /* [4] */ + BTF_END_RAW, + }, + .str_sec = "", + .str_sec_size = sizeof(""), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid arg#1", +}, + +{ + .descr = "func (void func(int a, unsigned int b))", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(int a, unsigned int b) */ + BTF_FUNC_PROTO_ENC(0, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + /* void func(int a, unsigned int b) */ + BTF_FUNC_ENC(NAME_TBD, 3), /* [4] */ + BTF_END_RAW, + }, + .str_sec = "\0a\0b\0func", + .str_sec_size = sizeof("\0a\0b\0func"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, +}, + +{ + .descr = "func (No func name)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(int a, unsigned int b) */ + BTF_FUNC_PROTO_ENC(0, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + /* void <no_name>(int a, unsigned int b) */ + BTF_FUNC_ENC(0, 3), /* [4] */ + BTF_END_RAW, + }, + .str_sec = "\0a\0b", + .str_sec_size = sizeof("\0a\0b"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid name", +}, + +{ + .descr = "func (Invalid func name)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(int a, unsigned int b) */ + BTF_FUNC_PROTO_ENC(0, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + /* void !!!(int a, unsigned int b) */ + BTF_FUNC_ENC(NAME_TBD, 3), /* [4] */ + BTF_END_RAW, + }, + .str_sec = "\0a\0b\0!!!", + .str_sec_size = sizeof("\0a\0b\0!!!"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid name", +}, + +{ + .descr = "func (Some arg has no name)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(int a, unsigned int) */ + BTF_FUNC_PROTO_ENC(0, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(0, 2), + /* void func(int a, unsigned int) */ + BTF_FUNC_ENC(NAME_TBD, 3), /* [4] */ + BTF_END_RAW, + }, + .str_sec = "\0a\0func", + .str_sec_size = sizeof("\0a\0func"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid arg#2", +}, + +{ + .descr = "func (Non zero vlen)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(int a, unsigned int b) */ + BTF_FUNC_PROTO_ENC(0, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + /* void func(int a, unsigned int b) */ + BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_FUNC, 0, 2), 3), /* [4] */ + BTF_END_RAW, + }, + .str_sec = "\0a\0b\0func", + .str_sec_size = sizeof("\0a\0b\0func"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "vlen != 0", +}, + +{ + .descr = "func (Not referring to FUNC_PROTO)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_FUNC_ENC(NAME_TBD, 1), /* [2] */ + BTF_END_RAW, + }, + .str_sec = "\0func", + .str_sec_size = sizeof("\0func"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid type_id", +}, + }; /* struct btf_raw_test raw_tests[] */ static const char *get_next_str(const char *start, const char *end) @@ -1940,13 +2434,13 @@ static struct btf_file_test file_tests[] = { }, }; -static int file_has_btf_elf(const char *fn) +static int file_has_btf_elf(const char *fn, bool *has_btf_ext) { Elf_Scn *scn = NULL; GElf_Ehdr ehdr; + int ret = 0; int elf_fd; Elf *elf; - int ret; if (CHECK(elf_version(EV_CURRENT) == EV_NONE, "elf_version(EV_CURRENT) == EV_NONE")) @@ -1978,14 +2472,12 @@ static int file_has_btf_elf(const char *fn) } sh_name = elf_strptr(elf, ehdr.e_shstrndx, sh.sh_name); - if (!strcmp(sh_name, BTF_ELF_SEC)) { + if (!strcmp(sh_name, BTF_ELF_SEC)) ret = 1; - goto done; - } + if (!strcmp(sh_name, BTF_EXT_ELF_SEC)) + *has_btf_ext = true; } - ret = 0; - done: close(elf_fd); elf_end(elf); @@ -1995,15 +2487,24 @@ done: static int do_test_file(unsigned int test_num) { const struct btf_file_test *test = &file_tests[test_num - 1]; + const char *expected_fnames[] = {"_dummy_tracepoint", + "test_long_fname_1", + "test_long_fname_2"}; + struct bpf_prog_info info = {}; struct bpf_object *obj = NULL; + struct bpf_func_info *finfo; struct bpf_program *prog; + __u32 info_len, rec_size; + bool has_btf_ext = false; + struct btf *btf = NULL; + void *func_info = NULL; struct bpf_map *map; - int err; + int i, err, prog_fd; fprintf(stderr, "BTF libbpf test[%u] (%s): ", test_num, test->file); - err = file_has_btf_elf(test->file); + err = file_has_btf_elf(test->file, &has_btf_ext); if (err == -1) return err; @@ -2031,6 +2532,7 @@ static int do_test_file(unsigned int test_num) err = bpf_object__load(obj); if (CHECK(err < 0, "bpf_object__load: %d", err)) goto done; + prog_fd = bpf_program__fd(prog); map = bpf_object__find_map_by_name(obj, "btf_map"); if (CHECK(!map, "btf_map not found")) { @@ -2045,9 +2547,100 @@ static int do_test_file(unsigned int test_num) test->btf_kv_notfound)) goto done; + if (!jit_enabled || !has_btf_ext) + goto skip_jit; + + /* get necessary program info */ + info_len = sizeof(struct bpf_prog_info); + err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); + + if (CHECK(err == -1, "invalid get info (1st) errno:%d", errno)) { + fprintf(stderr, "%s\n", btf_log_buf); + err = -1; + goto done; + } + if (CHECK(info.func_info_cnt != 3, + "incorrect info.func_info_cnt (1st) %d", + info.func_info_cnt)) { + err = -1; + goto done; + } + rec_size = info.func_info_rec_size; + if (CHECK(rec_size < 4, + "incorrect info.func_info_rec_size (1st) %d\n", rec_size)) { + err = -1; + goto done; + } + + func_info = malloc(info.func_info_cnt * rec_size); + if (CHECK(!func_info, "out of memory")) { + err = -1; + goto done; + } + + /* reset info to only retrieve func_info related data */ + memset(&info, 0, sizeof(info)); + info.func_info_cnt = 3; + info.func_info_rec_size = rec_size; + info.func_info = ptr_to_u64(func_info); + + err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); + + if (CHECK(err == -1, "invalid get info (2nd) errno:%d", errno)) { + fprintf(stderr, "%s\n", btf_log_buf); + err = -1; + goto done; + } + if (CHECK(info.func_info_cnt != 3, + "incorrect info.func_info_cnt (2nd) %d", + info.func_info_cnt)) { + err = -1; + goto done; + } + if (CHECK(info.func_info_rec_size != rec_size, + "incorrect info.func_info_rec_size (2nd) %d", + info.func_info_rec_size)) { + err = -1; + goto done; + } + + err = btf_get_from_id(info.btf_id, &btf); + if (CHECK(err, "cannot get btf from kernel, err: %d", err)) + goto done; + + /* check three functions */ + finfo = func_info; + for (i = 0; i < 3; i++) { + const struct btf_type *t; + const char *fname; + + t = btf__type_by_id(btf, finfo->type_id); + if (CHECK(!t, "btf__type_by_id failure: id %u", + finfo->type_id)) { + err = -1; + goto done; + } + + fname = btf__name_by_offset(btf, t->name_off); + err = strcmp(fname, expected_fnames[i]); + /* for the second and third functions in .text section, + * the compiler may order them either way. + */ + if (i && err) + err = strcmp(fname, expected_fnames[3 - i]); + if (CHECK(err, "incorrect fname %s", fname ? : "")) { + err = -1; + goto done; + } + + finfo = (void *)finfo + rec_size; + } + +skip_jit: fprintf(stderr, "OK"); done: + free(func_info); bpf_object__close(obj); return err; } @@ -2477,16 +3070,310 @@ static int test_pprint(void) return err; } +static struct btf_func_type_test { + const char *descr; + const char *str_sec; + __u32 raw_types[MAX_NR_RAW_TYPES]; + __u32 str_sec_size; + struct bpf_insn insns[MAX_INSNS]; + __u32 prog_type; + __u32 func_info[MAX_SUBPROGS][2]; + __u32 func_info_rec_size; + __u32 func_info_cnt; + bool expected_prog_load_failure; +} func_type_test[] = { +{ + .descr = "func_type (main func + one sub)", + .raw_types = { + BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(NAME_TBD, 0, 0, 32, 4), /* [2] */ + BTF_FUNC_PROTO_ENC(1, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_FUNC_PROTO_ENC(1, 2), /* [4] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_ENC(NAME_TBD, 3), /* [5] */ + BTF_FUNC_ENC(NAME_TBD, 4), /* [6] */ + BTF_END_RAW, + }, + .str_sec = "\0int\0unsigned int\0a\0b\0c\0d\0funcA\0funcB", + .str_sec_size = sizeof("\0int\0unsigned int\0a\0b\0c\0d\0funcA\0funcB"), + .insns = { + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2), + BPF_MOV64_IMM(BPF_REG_0, 1), + BPF_EXIT_INSN(), + BPF_MOV64_IMM(BPF_REG_0, 2), + BPF_EXIT_INSN(), + }, + .prog_type = BPF_PROG_TYPE_TRACEPOINT, + .func_info = { {0, 5}, {3, 6} }, + .func_info_rec_size = 8, + .func_info_cnt = 2, +}, + +{ + .descr = "func_type (Incorrect func_info_rec_size)", + .raw_types = { + BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(NAME_TBD, 0, 0, 32, 4), /* [2] */ + BTF_FUNC_PROTO_ENC(1, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_FUNC_PROTO_ENC(1, 2), /* [4] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_ENC(NAME_TBD, 3), /* [5] */ + BTF_FUNC_ENC(NAME_TBD, 4), /* [6] */ + BTF_END_RAW, + }, + .str_sec = "\0int\0unsigned int\0a\0b\0c\0d\0funcA\0funcB", + .str_sec_size = sizeof("\0int\0unsigned int\0a\0b\0c\0d\0funcA\0funcB"), + .insns = { + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2), + BPF_MOV64_IMM(BPF_REG_0, 1), + BPF_EXIT_INSN(), + BPF_MOV64_IMM(BPF_REG_0, 2), + BPF_EXIT_INSN(), + }, + .prog_type = BPF_PROG_TYPE_TRACEPOINT, + .func_info = { {0, 5}, {3, 6} }, + .func_info_rec_size = 4, + .func_info_cnt = 2, + .expected_prog_load_failure = true, +}, + +{ + .descr = "func_type (Incorrect func_info_cnt)", + .raw_types = { + BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(NAME_TBD, 0, 0, 32, 4), /* [2] */ + BTF_FUNC_PROTO_ENC(1, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_FUNC_PROTO_ENC(1, 2), /* [4] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_ENC(NAME_TBD, 3), /* [5] */ + BTF_FUNC_ENC(NAME_TBD, 4), /* [6] */ + BTF_END_RAW, + }, + .str_sec = "\0int\0unsigned int\0a\0b\0c\0d\0funcA\0funcB", + .str_sec_size = sizeof("\0int\0unsigned int\0a\0b\0c\0d\0funcA\0funcB"), + .insns = { + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2), + BPF_MOV64_IMM(BPF_REG_0, 1), + BPF_EXIT_INSN(), + BPF_MOV64_IMM(BPF_REG_0, 2), + BPF_EXIT_INSN(), + }, + .prog_type = BPF_PROG_TYPE_TRACEPOINT, + .func_info = { {0, 5}, {3, 6} }, + .func_info_rec_size = 8, + .func_info_cnt = 1, + .expected_prog_load_failure = true, +}, + +{ + .descr = "func_type (Incorrect bpf_func_info.insn_offset)", + .raw_types = { + BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(NAME_TBD, 0, 0, 32, 4), /* [2] */ + BTF_FUNC_PROTO_ENC(1, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_FUNC_PROTO_ENC(1, 2), /* [4] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_ENC(NAME_TBD, 3), /* [5] */ + BTF_FUNC_ENC(NAME_TBD, 4), /* [6] */ + BTF_END_RAW, + }, + .str_sec = "\0int\0unsigned int\0a\0b\0c\0d\0funcA\0funcB", + .str_sec_size = sizeof("\0int\0unsigned int\0a\0b\0c\0d\0funcA\0funcB"), + .insns = { + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2), + BPF_MOV64_IMM(BPF_REG_0, 1), + BPF_EXIT_INSN(), + BPF_MOV64_IMM(BPF_REG_0, 2), + BPF_EXIT_INSN(), + }, + .prog_type = BPF_PROG_TYPE_TRACEPOINT, + .func_info = { {0, 5}, {2, 6} }, + .func_info_rec_size = 8, + .func_info_cnt = 2, + .expected_prog_load_failure = true, +}, + +}; + +static size_t probe_prog_length(const struct bpf_insn *fp) +{ + size_t len; + + for (len = MAX_INSNS - 1; len > 0; --len) + if (fp[len].code != 0 || fp[len].imm != 0) + break; + return len + 1; +} + +static int do_test_func_type(int test_num) +{ + const struct btf_func_type_test *test = &func_type_test[test_num]; + unsigned int raw_btf_size, info_len, rec_size; + int i, btf_fd = -1, prog_fd = -1, err = 0; + struct bpf_load_program_attr attr = {}; + void *raw_btf, *func_info = NULL; + struct bpf_prog_info info = {}; + struct bpf_func_info *finfo; + + fprintf(stderr, "%s......", test->descr); + raw_btf = btf_raw_create(&hdr_tmpl, test->raw_types, + test->str_sec, test->str_sec_size, + &raw_btf_size); + + if (!raw_btf) + return -1; + + *btf_log_buf = '\0'; + btf_fd = bpf_load_btf(raw_btf, raw_btf_size, + btf_log_buf, BTF_LOG_BUF_SIZE, + args.always_log); + free(raw_btf); + + if (CHECK(btf_fd == -1, "invalid btf_fd errno:%d", errno)) { + err = -1; + goto done; + } + + if (*btf_log_buf && args.always_log) + fprintf(stderr, "\n%s", btf_log_buf); + + attr.prog_type = test->prog_type; + attr.insns = test->insns; + attr.insns_cnt = probe_prog_length(attr.insns); + attr.license = "GPL"; + attr.prog_btf_fd = btf_fd; + attr.func_info_rec_size = test->func_info_rec_size; + attr.func_info_cnt = test->func_info_cnt; + attr.func_info = test->func_info; + + *btf_log_buf = '\0'; + prog_fd = bpf_load_program_xattr(&attr, btf_log_buf, + BTF_LOG_BUF_SIZE); + if (test->expected_prog_load_failure && prog_fd == -1) { + err = 0; + goto done; + } + if (CHECK(prog_fd == -1, "invalid prog_id errno:%d", errno)) { + fprintf(stderr, "%s\n", btf_log_buf); + err = -1; + goto done; + } + if (!jit_enabled) { + skip_cnt++; + fprintf(stderr, "SKIPPED, please enable sysctl bpf_jit_enable\n"); + err = 0; + goto done; + } + + /* get necessary lens */ + info_len = sizeof(struct bpf_prog_info); + err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); + if (CHECK(err == -1, "invalid get info (1st) errno:%d", errno)) { + fprintf(stderr, "%s\n", btf_log_buf); + err = -1; + goto done; + } + if (CHECK(info.func_info_cnt != 2, + "incorrect info.func_info_cnt (1st) %d\n", + info.func_info_cnt)) { + err = -1; + goto done; + } + rec_size = info.func_info_rec_size; + if (CHECK(rec_size < 4, + "incorrect info.func_info_rec_size (1st) %d\n", rec_size)) { + err = -1; + goto done; + } + + func_info = malloc(info.func_info_cnt * rec_size); + if (CHECK(!func_info, "out of memory")) { + err = -1; + goto done; + } + + /* reset info to only retrieve func_info related data */ + memset(&info, 0, sizeof(info)); + info.func_info_cnt = 2; + info.func_info_rec_size = rec_size; + info.func_info = ptr_to_u64(func_info); + err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); + if (CHECK(err == -1, "invalid get info (2nd) errno:%d", errno)) { + fprintf(stderr, "%s\n", btf_log_buf); + err = -1; + goto done; + } + if (CHECK(info.func_info_cnt != 2, + "incorrect info.func_info_cnt (2nd) %d\n", + info.func_info_cnt)) { + err = -1; + goto done; + } + if (CHECK(info.func_info_rec_size != rec_size, + "incorrect info.func_info_rec_size (2nd) %d\n", + info.func_info_rec_size)) { + err = -1; + goto done; + } + + finfo = func_info; + for (i = 0; i < 2; i++) { + if (CHECK(finfo->type_id != test->func_info[i][1], + "incorrect func_type %u expected %u", + finfo->type_id, test->func_info[i][1])) { + err = -1; + goto done; + } + finfo = (void *)finfo + rec_size; + } + +done: + if (*btf_log_buf && (err || args.always_log)) + fprintf(stderr, "\n%s", btf_log_buf); + + if (btf_fd != -1) + close(btf_fd); + if (prog_fd != -1) + close(prog_fd); + free(func_info); + return err; +} + +static int test_func_type(void) +{ + unsigned int i; + int err = 0; + + for (i = 0; i < ARRAY_SIZE(func_type_test); i++) + err |= count_result(do_test_func_type(i)); + + return err; +} + static void usage(const char *cmd) { - fprintf(stderr, "Usage: %s [-l] [[-r test_num (1 - %zu)] | [-g test_num (1 - %zu)] | [-f test_num (1 - %zu)] | [-p]]\n", + fprintf(stderr, "Usage: %s [-l] [[-r test_num (1 - %zu)] |" + " [-g test_num (1 - %zu)] |" + " [-f test_num (1 - %zu)] | [-p] | [-k] ]\n", cmd, ARRAY_SIZE(raw_tests), ARRAY_SIZE(get_info_tests), ARRAY_SIZE(file_tests)); } static int parse_args(int argc, char **argv) { - const char *optstr = "lpf:r:g:"; + const char *optstr = "lpkf:r:g:"; int opt; while ((opt = getopt(argc, argv, optstr)) != -1) { @@ -2509,6 +3396,9 @@ static int parse_args(int argc, char **argv) case 'p': args.pprint_test = true; break; + case 'k': + args.func_type_test = true; + break; case 'h': usage(argv[0]); exit(0); @@ -2562,6 +3452,8 @@ int main(int argc, char **argv) if (args.always_log) libbpf_set_print(__base_pr, __base_pr, __base_pr); + jit_enabled = is_jit_enabled(); + if (args.raw_test) err |= test_raw(); @@ -2574,8 +3466,11 @@ int main(int argc, char **argv) if (args.pprint_test) err |= test_pprint(); + if (args.func_type_test) + err |= test_func_type(); + if (args.raw_test || args.get_info_test || args.file_test || - args.pprint_test) + args.pprint_test || args.func_type_test) goto done; err |= test_raw(); diff --git a/tools/testing/selftests/bpf/test_btf_haskv.c b/tools/testing/selftests/bpf/test_btf_haskv.c index b21b876f475d..e5c79fe0ffdb 100644 --- a/tools/testing/selftests/bpf/test_btf_haskv.c +++ b/tools/testing/selftests/bpf/test_btf_haskv.c @@ -24,8 +24,8 @@ struct dummy_tracepoint_args { struct sock *sock; }; -SEC("dummy_tracepoint") -int _dummy_tracepoint(struct dummy_tracepoint_args *arg) +__attribute__((noinline)) +static int test_long_fname_2(struct dummy_tracepoint_args *arg) { struct ipv_counts *counts; int key = 0; @@ -42,4 +42,16 @@ int _dummy_tracepoint(struct dummy_tracepoint_args *arg) return 0; } +__attribute__((noinline)) +static int test_long_fname_1(struct dummy_tracepoint_args *arg) +{ + return test_long_fname_2(arg); +} + +SEC("dummy_tracepoint") +int _dummy_tracepoint(struct dummy_tracepoint_args *arg) +{ + return test_long_fname_1(arg); +} + char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/test_btf_nokv.c b/tools/testing/selftests/bpf/test_btf_nokv.c index 0ed8e088eebf..434188c37774 100644 --- a/tools/testing/selftests/bpf/test_btf_nokv.c +++ b/tools/testing/selftests/bpf/test_btf_nokv.c @@ -22,8 +22,8 @@ struct dummy_tracepoint_args { struct sock *sock; }; -SEC("dummy_tracepoint") -int _dummy_tracepoint(struct dummy_tracepoint_args *arg) +__attribute__((noinline)) +static int test_long_fname_2(struct dummy_tracepoint_args *arg) { struct ipv_counts *counts; int key = 0; @@ -40,4 +40,16 @@ int _dummy_tracepoint(struct dummy_tracepoint_args *arg) return 0; } +__attribute__((noinline)) +static int test_long_fname_1(struct dummy_tracepoint_args *arg) +{ + return test_long_fname_2(arg); +} + +SEC("dummy_tracepoint") +int _dummy_tracepoint(struct dummy_tracepoint_args *arg) +{ + return test_long_fname_1(arg); +} + char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/test_flow_dissector.sh b/tools/testing/selftests/bpf/test_flow_dissector.sh index c0fb073b5eab..d23d4da66b83 100755 --- a/tools/testing/selftests/bpf/test_flow_dissector.sh +++ b/tools/testing/selftests/bpf/test_flow_dissector.sh @@ -59,7 +59,7 @@ else fi # Attach BPF program -./flow_dissector_load -p bpf_flow.o -s dissect +./flow_dissector_load -p bpf_flow.o -s flow_dissector # Setup tc qdisc add dev lo ingress diff --git a/tools/testing/selftests/bpf/test_libbpf.sh b/tools/testing/selftests/bpf/test_libbpf.sh index 156d89f1edcc..2989b2e2d856 100755 --- a/tools/testing/selftests/bpf/test_libbpf.sh +++ b/tools/testing/selftests/bpf/test_libbpf.sh @@ -33,17 +33,11 @@ trap exit_handler 0 2 3 6 9 libbpf_open_file test_l4lb.o -# TODO: fix libbpf to load noinline functions -# [warning] libbpf: incorrect bpf_call opcode -#libbpf_open_file test_l4lb_noinline.o +# Load a program with BPF-to-BPF calls +libbpf_open_file test_l4lb_noinline.o -# TODO: fix test_xdp_meta.c to load with libbpf -# [warning] libbpf: test_xdp_meta.o doesn't provide kernel version -#libbpf_open_file test_xdp_meta.o - -# TODO: fix libbpf to handle .eh_frame -# [warning] libbpf: relocation failed: no section(10) -#libbpf_open_file ../../../../samples/bpf/tracex3_kern.o +# Load a program compiled without the "-target bpf" flag +libbpf_open_file test_xdp.o # Success exit 0 diff --git a/tools/testing/selftests/bpf/test_map_in_map.c b/tools/testing/selftests/bpf/test_map_in_map.c new file mode 100644 index 000000000000..ce923e67e08e --- /dev/null +++ b/tools/testing/selftests/bpf/test_map_in_map.c @@ -0,0 +1,49 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2018 Facebook */ +#include <stddef.h> +#include <linux/bpf.h> +#include <linux/types.h> +#include "bpf_helpers.h" + +struct bpf_map_def SEC("maps") mim_array = { + .type = BPF_MAP_TYPE_ARRAY_OF_MAPS, + .key_size = sizeof(int), + /* must be sizeof(__u32) for map in map */ + .value_size = sizeof(__u32), + .max_entries = 1, + .map_flags = 0, +}; + +struct bpf_map_def SEC("maps") mim_hash = { + .type = BPF_MAP_TYPE_HASH_OF_MAPS, + .key_size = sizeof(int), + /* must be sizeof(__u32) for map in map */ + .value_size = sizeof(__u32), + .max_entries = 1, + .map_flags = 0, +}; + +SEC("xdp_mimtest") +int xdp_mimtest0(struct xdp_md *ctx) +{ + int value = 123; + int key = 0; + void *map; + + map = bpf_map_lookup_elem(&mim_array, &key); + if (!map) + return XDP_DROP; + + bpf_map_update_elem(map, &key, &value, 0); + + map = bpf_map_lookup_elem(&mim_hash, &key); + if (!map) + return XDP_DROP; + + bpf_map_update_elem(map, &key, &value, 0); + + return XDP_PASS; +} + +int _version SEC("version") = 1; +char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/test_maps.c b/tools/testing/selftests/bpf/test_maps.c index 4db2116e52be..9c79ee017df3 100644 --- a/tools/testing/selftests/bpf/test_maps.c +++ b/tools/testing/selftests/bpf/test_maps.c @@ -258,24 +258,36 @@ static void test_hashmap_percpu(int task, void *data) close(fd); } -static void test_hashmap_walk(int task, void *data) +static int helper_fill_hashmap(int max_entries) { - int fd, i, max_entries = 1000; - long long key, value, next_key; - bool next_key_valid = true; + int i, fd, ret; + long long key, value; fd = bpf_create_map(BPF_MAP_TYPE_HASH, sizeof(key), sizeof(value), max_entries, map_flags); - if (fd < 0) { - printf("Failed to create hashmap '%s'!\n", strerror(errno)); - exit(1); - } + CHECK(fd < 0, + "failed to create hashmap", + "err: %s, flags: 0x%x\n", strerror(errno), map_flags); for (i = 0; i < max_entries; i++) { key = i; value = key; - assert(bpf_map_update_elem(fd, &key, &value, BPF_NOEXIST) == 0); + ret = bpf_map_update_elem(fd, &key, &value, BPF_NOEXIST); + CHECK(ret != 0, + "can't update hashmap", + "err: %s\n", strerror(ret)); } + return fd; +} + +static void test_hashmap_walk(int task, void *data) +{ + int fd, i, max_entries = 1000; + long long key, value, next_key; + bool next_key_valid = true; + + fd = helper_fill_hashmap(max_entries); + for (i = 0; bpf_map_get_next_key(fd, !i ? NULL : &key, &next_key) == 0; i++) { key = next_key; @@ -306,6 +318,39 @@ static void test_hashmap_walk(int task, void *data) close(fd); } +static void test_hashmap_zero_seed(void) +{ + int i, first, second, old_flags; + long long key, next_first, next_second; + + old_flags = map_flags; + map_flags |= BPF_F_ZERO_SEED; + + first = helper_fill_hashmap(3); + second = helper_fill_hashmap(3); + + for (i = 0; ; i++) { + void *key_ptr = !i ? NULL : &key; + + if (bpf_map_get_next_key(first, key_ptr, &next_first) != 0) + break; + + CHECK(bpf_map_get_next_key(second, key_ptr, &next_second) != 0, + "next_key for second map must succeed", + "key_ptr: %p", key_ptr); + CHECK(next_first != next_second, + "keys must match", + "i: %d first: %lld second: %lld\n", i, + next_first, next_second); + + key = next_first; + } + + map_flags = old_flags; + close(first); + close(second); +} + static void test_arraymap(int task, void *data) { int key, next_key, fd; @@ -1080,6 +1125,94 @@ out_sockmap: exit(1); } +#define MAPINMAP_PROG "./test_map_in_map.o" +static void test_map_in_map(void) +{ + struct bpf_program *prog; + struct bpf_object *obj; + struct bpf_map *map; + int mim_fd, fd, err; + int pos = 0; + + obj = bpf_object__open(MAPINMAP_PROG); + + fd = bpf_create_map(BPF_MAP_TYPE_HASH, sizeof(int), sizeof(int), + 2, 0); + if (fd < 0) { + printf("Failed to create hashmap '%s'!\n", strerror(errno)); + exit(1); + } + + map = bpf_object__find_map_by_name(obj, "mim_array"); + if (IS_ERR(map)) { + printf("Failed to load array of maps from test prog\n"); + goto out_map_in_map; + } + err = bpf_map__set_inner_map_fd(map, fd); + if (err) { + printf("Failed to set inner_map_fd for array of maps\n"); + goto out_map_in_map; + } + + map = bpf_object__find_map_by_name(obj, "mim_hash"); + if (IS_ERR(map)) { + printf("Failed to load hash of maps from test prog\n"); + goto out_map_in_map; + } + err = bpf_map__set_inner_map_fd(map, fd); + if (err) { + printf("Failed to set inner_map_fd for hash of maps\n"); + goto out_map_in_map; + } + + bpf_object__for_each_program(prog, obj) { + bpf_program__set_xdp(prog); + } + bpf_object__load(obj); + + map = bpf_object__find_map_by_name(obj, "mim_array"); + if (IS_ERR(map)) { + printf("Failed to load array of maps from test prog\n"); + goto out_map_in_map; + } + mim_fd = bpf_map__fd(map); + if (mim_fd < 0) { + printf("Failed to get descriptor for array of maps\n"); + goto out_map_in_map; + } + + err = bpf_map_update_elem(mim_fd, &pos, &fd, 0); + if (err) { + printf("Failed to update array of maps\n"); + goto out_map_in_map; + } + + map = bpf_object__find_map_by_name(obj, "mim_hash"); + if (IS_ERR(map)) { + printf("Failed to load hash of maps from test prog\n"); + goto out_map_in_map; + } + mim_fd = bpf_map__fd(map); + if (mim_fd < 0) { + printf("Failed to get descriptor for hash of maps\n"); + goto out_map_in_map; + } + + err = bpf_map_update_elem(mim_fd, &pos, &fd, 0); + if (err) { + printf("Failed to update hash of maps\n"); + goto out_map_in_map; + } + + close(fd); + bpf_object__close(obj); + return; + +out_map_in_map: + close(fd); + exit(1); +} + #define MAP_SIZE (32 * 1024) static void test_map_large(void) @@ -1534,6 +1667,7 @@ static void run_all_tests(void) test_hashmap(0, NULL); test_hashmap_percpu(0, NULL); test_hashmap_walk(0, NULL); + test_hashmap_zero_seed(); test_arraymap(0, NULL); test_arraymap_percpu(0, NULL); @@ -1554,6 +1688,8 @@ static void run_all_tests(void) test_queuemap(0, NULL); test_stackmap(0, NULL); + + test_map_in_map(); } int main(void) diff --git a/tools/testing/selftests/bpf/test_progs.c b/tools/testing/selftests/bpf/test_progs.c index 2d3c04f45530..c1e688f61061 100644 --- a/tools/testing/selftests/bpf/test_progs.c +++ b/tools/testing/selftests/bpf/test_progs.c @@ -1703,7 +1703,7 @@ static void test_reference_tracking() const char *file = "./test_sk_lookup_kern.o"; struct bpf_object *obj; struct bpf_program *prog; - __u32 duration; + __u32 duration = 0; int err = 0; obj = bpf_object__open(file); diff --git a/tools/testing/selftests/bpf/test_sock_addr.c b/tools/testing/selftests/bpf/test_sock_addr.c index aeeb76a54d63..73b7493d4120 100644 --- a/tools/testing/selftests/bpf/test_sock_addr.c +++ b/tools/testing/selftests/bpf/test_sock_addr.c @@ -574,24 +574,44 @@ static int bind4_prog_load(const struct sock_addr_test *test) /* if (sk.family == AF_INET && */ BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_6, offsetof(struct bpf_sock_addr, family)), - BPF_JMP_IMM(BPF_JNE, BPF_REG_7, AF_INET, 16), + BPF_JMP_IMM(BPF_JNE, BPF_REG_7, AF_INET, 24), /* (sk.type == SOCK_DGRAM || sk.type == SOCK_STREAM) && */ BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_6, offsetof(struct bpf_sock_addr, type)), BPF_JMP_IMM(BPF_JNE, BPF_REG_7, SOCK_DGRAM, 1), BPF_JMP_A(1), - BPF_JMP_IMM(BPF_JNE, BPF_REG_7, SOCK_STREAM, 12), + BPF_JMP_IMM(BPF_JNE, BPF_REG_7, SOCK_STREAM, 20), /* 1st_byte_of_user_ip4 == expected && */ BPF_LDX_MEM(BPF_B, BPF_REG_7, BPF_REG_6, offsetof(struct bpf_sock_addr, user_ip4)), - BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr8[0], 10), + BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr8[0], 18), + + /* 2nd_byte_of_user_ip4 == expected && */ + BPF_LDX_MEM(BPF_B, BPF_REG_7, BPF_REG_6, + offsetof(struct bpf_sock_addr, user_ip4) + 1), + BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr8[1], 16), + + /* 3rd_byte_of_user_ip4 == expected && */ + BPF_LDX_MEM(BPF_B, BPF_REG_7, BPF_REG_6, + offsetof(struct bpf_sock_addr, user_ip4) + 2), + BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr8[2], 14), + + /* 4th_byte_of_user_ip4 == expected && */ + BPF_LDX_MEM(BPF_B, BPF_REG_7, BPF_REG_6, + offsetof(struct bpf_sock_addr, user_ip4) + 3), + BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr8[3], 12), /* 1st_half_of_user_ip4 == expected && */ BPF_LDX_MEM(BPF_H, BPF_REG_7, BPF_REG_6, offsetof(struct bpf_sock_addr, user_ip4)), - BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr16[0], 8), + BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr16[0], 10), + + /* 2nd_half_of_user_ip4 == expected && */ + BPF_LDX_MEM(BPF_H, BPF_REG_7, BPF_REG_6, + offsetof(struct bpf_sock_addr, user_ip4) + 2), + BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr16[1], 8), /* whole_user_ip4 == expected) { */ BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_6, diff --git a/tools/testing/selftests/bpf/test_tcpnotify.h b/tools/testing/selftests/bpf/test_tcpnotify.h new file mode 100644 index 000000000000..8b6cea030bfc --- /dev/null +++ b/tools/testing/selftests/bpf/test_tcpnotify.h @@ -0,0 +1,19 @@ +// SPDX-License-Identifier: GPL-2.0 + +#ifndef _TEST_TCPBPF_H +#define _TEST_TCPBPF_H + +struct tcpnotify_globals { + __u32 total_retrans; + __u32 ncalls; +}; + +struct tcp_notifier { + __u8 type; + __u8 subtype; + __u8 source; + __u8 hash; +}; + +#define TESTPORT 12877 +#endif diff --git a/tools/testing/selftests/bpf/test_tcpnotify_kern.c b/tools/testing/selftests/bpf/test_tcpnotify_kern.c new file mode 100644 index 000000000000..edbca203ce2d --- /dev/null +++ b/tools/testing/selftests/bpf/test_tcpnotify_kern.c @@ -0,0 +1,95 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <stddef.h> +#include <string.h> +#include <linux/bpf.h> +#include <linux/if_ether.h> +#include <linux/if_packet.h> +#include <linux/ip.h> +#include <linux/ipv6.h> +#include <linux/types.h> +#include <linux/socket.h> +#include <linux/tcp.h> +#include <netinet/in.h> +#include "bpf_helpers.h" +#include "bpf_endian.h" +#include "test_tcpnotify.h" + +struct bpf_map_def SEC("maps") global_map = { + .type = BPF_MAP_TYPE_ARRAY, + .key_size = sizeof(__u32), + .value_size = sizeof(struct tcpnotify_globals), + .max_entries = 4, +}; + +struct bpf_map_def SEC("maps") perf_event_map = { + .type = BPF_MAP_TYPE_PERF_EVENT_ARRAY, + .key_size = sizeof(int), + .value_size = sizeof(__u32), + .max_entries = 2, +}; + +int _version SEC("version") = 1; + +SEC("sockops") +int bpf_testcb(struct bpf_sock_ops *skops) +{ + int rv = -1; + int op; + + op = (int) skops->op; + + if (bpf_ntohl(skops->remote_port) != TESTPORT) { + skops->reply = -1; + return 0; + } + + switch (op) { + case BPF_SOCK_OPS_TIMEOUT_INIT: + case BPF_SOCK_OPS_RWND_INIT: + case BPF_SOCK_OPS_NEEDS_ECN: + case BPF_SOCK_OPS_BASE_RTT: + case BPF_SOCK_OPS_RTO_CB: + rv = 1; + break; + + case BPF_SOCK_OPS_TCP_CONNECT_CB: + case BPF_SOCK_OPS_TCP_LISTEN_CB: + case BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB: + case BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB: + bpf_sock_ops_cb_flags_set(skops, (BPF_SOCK_OPS_RETRANS_CB_FLAG| + BPF_SOCK_OPS_RTO_CB_FLAG)); + rv = 1; + break; + case BPF_SOCK_OPS_RETRANS_CB: { + __u32 key = 0; + struct tcpnotify_globals g, *gp; + struct tcp_notifier msg = { + .type = 0xde, + .subtype = 0xad, + .source = 0xbe, + .hash = 0xef, + }; + + rv = 1; + + /* Update results */ + gp = bpf_map_lookup_elem(&global_map, &key); + if (!gp) + break; + g = *gp; + g.total_retrans = skops->total_retrans; + g.ncalls++; + bpf_map_update_elem(&global_map, &key, &g, + BPF_ANY); + bpf_perf_event_output(skops, &perf_event_map, + BPF_F_CURRENT_CPU, + &msg, sizeof(msg)); + } + break; + default: + rv = -1; + } + skops->reply = rv; + return 1; +} +char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/test_tcpnotify_user.c b/tools/testing/selftests/bpf/test_tcpnotify_user.c new file mode 100644 index 000000000000..ff3c4522aed6 --- /dev/null +++ b/tools/testing/selftests/bpf/test_tcpnotify_user.c @@ -0,0 +1,186 @@ +// SPDX-License-Identifier: GPL-2.0 +#define _GNU_SOURCE +#include <pthread.h> +#include <inttypes.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <asm/types.h> +#include <sys/syscall.h> +#include <errno.h> +#include <string.h> +#include <linux/bpf.h> +#include <sys/socket.h> +#include <bpf/bpf.h> +#include <bpf/libbpf.h> +#include <sys/ioctl.h> +#include <linux/rtnetlink.h> +#include <signal.h> +#include <linux/perf_event.h> + +#include "bpf_rlimit.h" +#include "bpf_util.h" +#include "cgroup_helpers.h" + +#include "test_tcpnotify.h" +#include "trace_helpers.h" + +#define SOCKET_BUFFER_SIZE (getpagesize() < 8192L ? getpagesize() : 8192L) + +pthread_t tid; +int rx_callbacks; + +static int dummyfn(void *data, int size) +{ + struct tcp_notifier *t = data; + + if (t->type != 0xde || t->subtype != 0xad || + t->source != 0xbe || t->hash != 0xef) + return 1; + rx_callbacks++; + return 0; +} + +void tcp_notifier_poller(int fd) +{ + while (1) + perf_event_poller(fd, dummyfn); +} + +static void *poller_thread(void *arg) +{ + int fd = *(int *)arg; + + tcp_notifier_poller(fd); + return arg; +} + +int verify_result(const struct tcpnotify_globals *result) +{ + return (result->ncalls > 0 && result->ncalls == rx_callbacks ? 0 : 1); +} + +static int bpf_find_map(const char *test, struct bpf_object *obj, + const char *name) +{ + struct bpf_map *map; + + map = bpf_object__find_map_by_name(obj, name); + if (!map) { + printf("%s:FAIL:map '%s' not found\n", test, name); + return -1; + } + return bpf_map__fd(map); +} + +static int setup_bpf_perf_event(int mapfd) +{ + struct perf_event_attr attr = { + .sample_type = PERF_SAMPLE_RAW, + .type = PERF_TYPE_SOFTWARE, + .config = PERF_COUNT_SW_BPF_OUTPUT, + }; + int key = 0; + int pmu_fd; + + pmu_fd = syscall(__NR_perf_event_open, &attr, -1, 0, -1, 0); + if (pmu_fd < 0) + return pmu_fd; + bpf_map_update_elem(mapfd, &key, &pmu_fd, BPF_ANY); + + ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0); + return pmu_fd; +} + +int main(int argc, char **argv) +{ + const char *file = "test_tcpnotify_kern.o"; + int prog_fd, map_fd, perf_event_fd; + struct tcpnotify_globals g = {0}; + const char *cg_path = "/foo"; + int error = EXIT_FAILURE; + struct bpf_object *obj; + int cg_fd = -1; + __u32 key = 0; + int rv; + char test_script[80]; + int pmu_fd; + cpu_set_t cpuset; + + CPU_ZERO(&cpuset); + CPU_SET(0, &cpuset); + pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset); + + if (setup_cgroup_environment()) + goto err; + + cg_fd = create_and_get_cgroup(cg_path); + if (!cg_fd) + goto err; + + if (join_cgroup(cg_path)) + goto err; + + if (bpf_prog_load(file, BPF_PROG_TYPE_SOCK_OPS, &obj, &prog_fd)) { + printf("FAILED: load_bpf_file failed for: %s\n", file); + goto err; + } + + rv = bpf_prog_attach(prog_fd, cg_fd, BPF_CGROUP_SOCK_OPS, 0); + if (rv) { + printf("FAILED: bpf_prog_attach: %d (%s)\n", + error, strerror(errno)); + goto err; + } + + perf_event_fd = bpf_find_map(__func__, obj, "perf_event_map"); + if (perf_event_fd < 0) + goto err; + + map_fd = bpf_find_map(__func__, obj, "global_map"); + if (map_fd < 0) + goto err; + + pmu_fd = setup_bpf_perf_event(perf_event_fd); + if (pmu_fd < 0 || perf_event_mmap(pmu_fd) < 0) + goto err; + + pthread_create(&tid, NULL, poller_thread, (void *)&pmu_fd); + + sprintf(test_script, + "/usr/sbin/iptables -A INPUT -p tcp --dport %d -j DROP", + TESTPORT); + system(test_script); + + sprintf(test_script, + "/usr/bin/nc 127.0.0.1 %d < /etc/passwd > /dev/null 2>&1 ", + TESTPORT); + system(test_script); + + sprintf(test_script, + "/usr/sbin/iptables -D INPUT -p tcp --dport %d -j DROP", + TESTPORT); + system(test_script); + + rv = bpf_map_lookup_elem(map_fd, &key, &g); + if (rv != 0) { + printf("FAILED: bpf_map_lookup_elem returns %d\n", rv); + goto err; + } + + sleep(10); + + if (verify_result(&g)) { + printf("FAILED: Wrong stats Expected %d calls, got %d\n", + g.ncalls, rx_callbacks); + goto err; + } + + printf("PASSED!\n"); + error = 0; +err: + bpf_prog_detach(cg_fd, BPF_CGROUP_SOCK_OPS); + close(cg_fd); + cleanup_cgroup_environment(); + return error; +} diff --git a/tools/testing/selftests/bpf/test_verifier.c b/tools/testing/selftests/bpf/test_verifier.c index 6f61df62f690..537a8f91af02 100644 --- a/tools/testing/selftests/bpf/test_verifier.c +++ b/tools/testing/selftests/bpf/test_verifier.c @@ -2026,29 +2026,27 @@ static struct bpf_test tests[] = { .result = ACCEPT, }, { - "check skb->hash byte load not permitted 1", + "check skb->hash byte load permitted 1", .insns = { BPF_MOV64_IMM(BPF_REG_0, 0), BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, offsetof(struct __sk_buff, hash) + 1), BPF_EXIT_INSN(), }, - .errstr = "invalid bpf_context access", - .result = REJECT, + .result = ACCEPT, }, { - "check skb->hash byte load not permitted 2", + "check skb->hash byte load permitted 2", .insns = { BPF_MOV64_IMM(BPF_REG_0, 0), BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, offsetof(struct __sk_buff, hash) + 2), BPF_EXIT_INSN(), }, - .errstr = "invalid bpf_context access", - .result = REJECT, + .result = ACCEPT, }, { - "check skb->hash byte load not permitted 3", + "check skb->hash byte load permitted 3", .insns = { BPF_MOV64_IMM(BPF_REG_0, 0), #if __BYTE_ORDER == __LITTLE_ENDIAN @@ -2060,8 +2058,7 @@ static struct bpf_test tests[] = { #endif BPF_EXIT_INSN(), }, - .errstr = "invalid bpf_context access", - .result = REJECT, + .result = ACCEPT, }, { "check cb access: byte, wrong type", @@ -2173,7 +2170,7 @@ static struct bpf_test tests[] = { .result = ACCEPT, }, { - "check skb->hash half load not permitted", + "check skb->hash half load permitted 2", .insns = { BPF_MOV64_IMM(BPF_REG_0, 0), #if __BYTE_ORDER == __LITTLE_ENDIAN @@ -2185,6 +2182,37 @@ static struct bpf_test tests[] = { #endif BPF_EXIT_INSN(), }, + .result = ACCEPT, + }, + { + "check skb->hash half load not permitted, unaligned 1", + .insns = { + BPF_MOV64_IMM(BPF_REG_0, 0), +#if __BYTE_ORDER == __LITTLE_ENDIAN + BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1, + offsetof(struct __sk_buff, hash) + 1), +#else + BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1, + offsetof(struct __sk_buff, hash) + 3), +#endif + BPF_EXIT_INSN(), + }, + .errstr = "invalid bpf_context access", + .result = REJECT, + }, + { + "check skb->hash half load not permitted, unaligned 3", + .insns = { + BPF_MOV64_IMM(BPF_REG_0, 0), +#if __BYTE_ORDER == __LITTLE_ENDIAN + BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1, + offsetof(struct __sk_buff, hash) + 3), +#else + BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1, + offsetof(struct __sk_buff, hash) + 1), +#endif + BPF_EXIT_INSN(), + }, .errstr = "invalid bpf_context access", .result = REJECT, }, @@ -2418,6 +2446,10 @@ static struct bpf_test tests[] = { offsetof(struct __sk_buff, tc_index)), BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_0, offsetof(struct __sk_buff, cb[3])), + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, + offsetof(struct __sk_buff, tstamp)), + BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, + offsetof(struct __sk_buff, tstamp)), BPF_EXIT_INSN(), }, .errstr_unpriv = "", @@ -5270,6 +5302,31 @@ static struct bpf_test tests[] = { .prog_type = BPF_PROG_TYPE_CGROUP_SKB, }, { + "write tstamp from CGROUP_SKB", + .insns = { + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, + offsetof(struct __sk_buff, tstamp)), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .result_unpriv = REJECT, + .errstr_unpriv = "invalid bpf_context access off=152 size=8", + .prog_type = BPF_PROG_TYPE_CGROUP_SKB, + }, + { + "read tstamp from CGROUP_SKB", + .insns = { + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, + offsetof(struct __sk_buff, tstamp)), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .prog_type = BPF_PROG_TYPE_CGROUP_SKB, + }, + { "multiple registers share map_lookup_elem result", .insns = { BPF_MOV64_IMM(BPF_REG_1, 10), |