diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/bpf_iter_bpf_sk_storage_helpers.c')
-rw-r--r-- | tools/testing/selftests/bpf/progs/bpf_iter_bpf_sk_storage_helpers.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_bpf_sk_storage_helpers.c b/tools/testing/selftests/bpf/progs/bpf_iter_bpf_sk_storage_helpers.c new file mode 100644 index 0000000000..6cecab2b32 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/bpf_iter_bpf_sk_storage_helpers.c @@ -0,0 +1,65 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2020 Google LLC. */ +#include "bpf_iter.h" +#include <bpf/bpf_helpers.h> +#include <bpf/bpf_tracing.h> + +char _license[] SEC("license") = "GPL"; + +struct { + __uint(type, BPF_MAP_TYPE_SK_STORAGE); + __uint(map_flags, BPF_F_NO_PREALLOC); + __type(key, int); + __type(value, int); +} sk_stg_map SEC(".maps"); + +SEC("iter/bpf_sk_storage_map") +int delete_bpf_sk_storage_map(struct bpf_iter__bpf_sk_storage_map *ctx) +{ + if (ctx->sk) + bpf_sk_storage_delete(&sk_stg_map, ctx->sk); + + return 0; +} + +SEC("iter/task_file") +int fill_socket_owner(struct bpf_iter__task_file *ctx) +{ + struct task_struct *task = ctx->task; + struct file *file = ctx->file; + struct socket *sock; + int *sock_tgid; + + if (!task || !file) + return 0; + + sock = bpf_sock_from_file(file); + if (!sock) + return 0; + + sock_tgid = bpf_sk_storage_get(&sk_stg_map, sock->sk, 0, 0); + if (!sock_tgid) + return 0; + + *sock_tgid = task->tgid; + + return 0; +} + +SEC("iter/tcp") +int negate_socket_local_storage(struct bpf_iter__tcp *ctx) +{ + struct sock_common *sk_common = ctx->sk_common; + int *sock_tgid; + + if (!sk_common) + return 0; + + sock_tgid = bpf_sk_storage_get(&sk_stg_map, sk_common, 0, 0); + if (!sock_tgid) + return 0; + + *sock_tgid = -*sock_tgid; + + return 0; +} |