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| author | Roman Gushchin <guro@fb.com> | 2018-09-28 16:45:58 +0200 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-10-01 16:18:33 +0200 |
| commit | 5fcbd29b372402c96b182e0e80b3d95463431490 (patch) | |
| tree | 460af9949d1e63fb16bcf8ffde5b9c833b5fcb9e /samples/bpf | |
| parent | selftests/bpf: extend the storage test to test per-cpu cgroup storage (diff) | |
| download | linux-5fcbd29b372402c96b182e0e80b3d95463431490.tar.xz linux-5fcbd29b372402c96b182e0e80b3d95463431490.zip | |
samples/bpf: extend test_cgrp2_attach2 test to use per-cpu cgroup storage
This commit extends the test_cgrp2_attach2 test to cover per-cpu
cgroup storage. Bpf program will use shared and per-cpu cgroup
storages simultaneously, so a better coverage of corresponding
core code will be achieved.
Expected output:
$ ./test_cgrp2_attach2
Attached DROP prog. This ping in cgroup /foo should fail...
ping: sendmsg: Operation not permitted
Attached DROP prog. This ping in cgroup /foo/bar should fail...
ping: sendmsg: Operation not permitted
Attached PASS prog. This ping in cgroup /foo/bar should pass...
Detached PASS from /foo/bar while DROP is attached to /foo.
This ping in cgroup /foo/bar should fail...
ping: sendmsg: Operation not permitted
Attached PASS from /foo/bar and detached DROP from /foo.
This ping in cgroup /foo/bar should pass...
### override:PASS
### multi:PASS
Signed-off-by: Roman Gushchin <guro@fb.com>
Acked-by: Song Liu <songliubraving@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'samples/bpf')
| -rw-r--r-- | samples/bpf/test_cgrp2_attach2.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/samples/bpf/test_cgrp2_attach2.c b/samples/bpf/test_cgrp2_attach2.c index 180f9d813bca..d7b68ef5ba79 100644 --- a/samples/bpf/test_cgrp2_attach2.c +++ b/samples/bpf/test_cgrp2_attach2.c @@ -209,7 +209,7 @@ static int map_fd = -1; static int prog_load_cnt(int verdict, int val) { - int cgroup_storage_fd; + int cgroup_storage_fd, percpu_cgroup_storage_fd; if (map_fd < 0) map_fd = bpf_create_map(BPF_MAP_TYPE_ARRAY, 4, 8, 1, 0); @@ -225,6 +225,14 @@ static int prog_load_cnt(int verdict, int val) return -1; } + percpu_cgroup_storage_fd = bpf_create_map( + BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE, + sizeof(struct bpf_cgroup_storage_key), 8, 0, 0); + if (percpu_cgroup_storage_fd < 0) { + printf("failed to create map '%s'\n", strerror(errno)); + return -1; + } + struct bpf_insn prog[] = { BPF_MOV32_IMM(BPF_REG_0, 0), BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_0, -4), /* *(u32 *)(fp - 4) = r0 */ @@ -235,11 +243,20 @@ static int prog_load_cnt(int verdict, int val) BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 2), BPF_MOV64_IMM(BPF_REG_1, val), /* r1 = 1 */ BPF_RAW_INSN(BPF_STX | BPF_XADD | BPF_DW, BPF_REG_0, BPF_REG_1, 0, 0), /* xadd r0 += r1 */ + BPF_LD_MAP_FD(BPF_REG_1, cgroup_storage_fd), BPF_MOV64_IMM(BPF_REG_2, 0), BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_local_storage), BPF_MOV64_IMM(BPF_REG_1, val), BPF_RAW_INSN(BPF_STX | BPF_XADD | BPF_W, BPF_REG_0, BPF_REG_1, 0, 0), + + BPF_LD_MAP_FD(BPF_REG_1, percpu_cgroup_storage_fd), + BPF_MOV64_IMM(BPF_REG_2, 0), + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_local_storage), + BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_0, 0), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_3, 0x1), + BPF_STX_MEM(BPF_W, BPF_REG_0, BPF_REG_3, 0), + BPF_MOV64_IMM(BPF_REG_0, verdict), /* r0 = verdict */ BPF_EXIT_INSN(), }; |