diff options
Diffstat (limited to 'samples/sockmap/sockmap_kern.c')
| -rw-r--r-- | samples/sockmap/sockmap_kern.c | 62 |
1 files changed, 49 insertions, 13 deletions
diff --git a/samples/sockmap/sockmap_kern.c b/samples/sockmap/sockmap_kern.c index 9ad5ba79c85a..9ff8bc5dc206 100644 --- a/samples/sockmap/sockmap_kern.c +++ b/samples/sockmap/sockmap_kern.c @@ -54,7 +54,7 @@ struct bpf_map_def SEC("maps") sock_map_redir = { .type = BPF_MAP_TYPE_SOCKMAP, .key_size = sizeof(int), .value_size = sizeof(int), - .max_entries = 1, + .max_entries = 20, }; struct bpf_map_def SEC("maps") sock_apply_bytes = { @@ -78,6 +78,19 @@ struct bpf_map_def SEC("maps") sock_pull_bytes = { .max_entries = 2 }; +struct bpf_map_def SEC("maps") sock_redir_flags = { + .type = BPF_MAP_TYPE_ARRAY, + .key_size = sizeof(int), + .value_size = sizeof(int), + .max_entries = 1 +}; + +struct bpf_map_def SEC("maps") sock_skb_opts = { + .type = BPF_MAP_TYPE_ARRAY, + .key_size = sizeof(int), + .value_size = sizeof(int), + .max_entries = 1 +}; SEC("sk_skb1") int bpf_prog1(struct __sk_buff *skb) @@ -90,15 +103,24 @@ int bpf_prog2(struct __sk_buff *skb) { __u32 lport = skb->local_port; __u32 rport = skb->remote_port; - int ret = 0; + int len, *f, ret, zero = 0; + __u64 flags = 0; if (lport == 10000) ret = 10; else ret = 1; - bpf_printk("sockmap: %d -> %d @ %d\n", lport, bpf_ntohl(rport), ret); - return bpf_sk_redirect_map(skb, &sock_map, ret, 0); + len = (__u32)skb->data_end - (__u32)skb->data; + f = bpf_map_lookup_elem(&sock_skb_opts, &zero); + if (f && *f) { + ret = 3; + flags = *f; + } + + bpf_printk("sk_skb2: redirect(%iB) flags=%i\n", + len, flags); + return bpf_sk_redirect_map(skb, &sock_map, ret, flags); } SEC("sockops") @@ -197,8 +219,9 @@ int bpf_prog5(struct sk_msg_md *msg) SEC("sk_msg3") int bpf_prog6(struct sk_msg_md *msg) { - int *bytes, zero = 0, one = 1; - int *start, *end; + int *bytes, zero = 0, one = 1, key = 0; + int *start, *end, *f; + __u64 flags = 0; bytes = bpf_map_lookup_elem(&sock_apply_bytes, &zero); if (bytes) @@ -210,15 +233,22 @@ int bpf_prog6(struct sk_msg_md *msg) end = bpf_map_lookup_elem(&sock_pull_bytes, &one); if (start && end) bpf_msg_pull_data(msg, *start, *end, 0); - return bpf_msg_redirect_map(msg, &sock_map_redir, zero, 0); + f = bpf_map_lookup_elem(&sock_redir_flags, &zero); + if (f && *f) { + key = 2; + flags = *f; + } + return bpf_msg_redirect_map(msg, &sock_map_redir, key, flags); } SEC("sk_msg4") int bpf_prog7(struct sk_msg_md *msg) { - int err1 = 0, err2 = 0, zero = 0, one = 1; - int *bytes, *start, *end, len1, len2; + int err1 = 0, err2 = 0, zero = 0, one = 1, key = 0; + int *f, *bytes, *start, *end, len1, len2; + __u64 flags = 0; + int err; bytes = bpf_map_lookup_elem(&sock_apply_bytes, &zero); if (bytes) err1 = bpf_msg_apply_bytes(msg, *bytes); @@ -229,7 +259,6 @@ int bpf_prog7(struct sk_msg_md *msg) start = bpf_map_lookup_elem(&sock_pull_bytes, &zero); end = bpf_map_lookup_elem(&sock_pull_bytes, &one); if (start && end) { - int err; bpf_printk("sk_msg2: pull(%i:%i)\n", start ? *start : 0, end ? *end : 0); @@ -241,9 +270,16 @@ int bpf_prog7(struct sk_msg_md *msg) bpf_printk("sk_msg2: length update %i->%i\n", len1, len2); } - bpf_printk("sk_msg3: redirect(%iB) err1=%i err2=%i\n", - len1, err1, err2); - return bpf_msg_redirect_map(msg, &sock_map_redir, zero, 0); + f = bpf_map_lookup_elem(&sock_redir_flags, &zero); + if (f && *f) { + key = 2; + flags = *f; + } + bpf_printk("sk_msg3: redirect(%iB) flags=%i err=%i\n", + len1, flags, err1 ? err1 : err2); + err = bpf_msg_redirect_map(msg, &sock_map_redir, key, flags); + bpf_printk("sk_msg3: err %i\n", err); + return err; } SEC("sk_msg5") |