linux/samples/bpf/Makefile at 5aee40e4f7f321e0440b468ca8c3e006bd803cf8 - system/linux - HydraGit

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Alexei Starovoitov 3c731eba48 bpf: mini eBPF library, test stubs and verifier testsuite

1.
the library includes a trivial set of BPF syscall wrappers:
int bpf_create_map(int key_size, int value_size, int max_entries);
int bpf_update_elem(int fd, void *key, void *value);
int bpf_lookup_elem(int fd, void *key, void *value);
int bpf_delete_elem(int fd, void *key);
int bpf_get_next_key(int fd, void *key, void *next_key);
int bpf_prog_load(enum bpf_prog_type prog_type,
		  const struct sock_filter_int *insns, int insn_len,
		  const char *license);
bpf_prog_load() stores verifier log into global bpf_log_buf[] array

and BPF_*() macros to build instructions

2.
test stubs configure eBPF infra with 'unspec' map and program types.
These are fake types used by user space testsuite only.

3.
verifier tests valid and invalid programs and expects predefined
error log messages from kernel.
40 tests so far.

$ sudo ./test_verifier
 #0 add+sub+mul OK
 #1 unreachable OK
 #2 unreachable2 OK
 #3 out of range jump OK
 #4 out of range jump2 OK
 #5 test1 ld_imm64 OK
 ...

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2014-09-26 15:05:15 -04:00

12 lines

306 B

Makefile

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 # kbuild trick to avoid linker error. Can be omitted if a module is built.
 obj- := dummy.o
 # List of programs to build
 hostprogs-y := test_verifier
 test_verifier-objs := test_verifier.o libbpf.o
 # Tell kbuild to always build the programs
 always := $(hostprogs-y)
 HOSTCFLAGS += -I$(objtree)/usr/include