rename try_make_readable() to try_make_writable()
In practice this function makes things readable and writable,
so use a less confusing name.
Test: TreeHugger, 'git grep try_make_readable' comes up empty
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I32faad148cc5714cf0ec7246620376ed4dd3d6d2
diff --git a/bpf_progs/bpf_net_helpers.h b/bpf_progs/bpf_net_helpers.h
index c798580..e382713 100644
--- a/bpf_progs/bpf_net_helpers.h
+++ b/bpf_progs/bpf_net_helpers.h
@@ -65,8 +65,9 @@
skb->pkt_type == PACKET_MULTICAST;
}
-// try to make the first 'len' header bytes readable via direct packet access
-static inline __always_inline void try_make_readable(struct __sk_buff* skb, int len) {
+// try to make the first 'len' header bytes readable/writable via direct packet access
+// (note: AFAIK there is no way to ask for only direct packet read without also getting write)
+static inline __always_inline void try_make_writable(struct __sk_buff* skb, int len) {
if (len > skb->len) len = skb->len;
if (skb->data_end - skb->data < len) bpf_skb_pull_data(skb, len);
}