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authorCong Wang <cong.wang@bytedance.com>2022-06-15 09:20:12 -0700
committerDaniel Borkmann <daniel@iogearbox.net>2022-06-20 14:05:52 +0200
commit965b57b469a589d64d81b1688b38dcb537011bb0 (patch)
tree968209ff361fc86f0f49071cf4817c65e21d10aa /include/linux/net.h
parent04919bed948dc22a0032a9da867b7dcb8aece4ca (diff)
net: Introduce a new proto_ops ->read_skb()
Currently both splice() and sockmap use ->read_sock() to read skb from receive queue, but for sockmap we only read one entire skb at a time, so ->read_sock() is too conservative to use. Introduce a new proto_ops ->read_skb() which supports this sematic, with this we can finally pass the ownership of skb to recv actors. For non-TCP protocols, all ->read_sock() can be simply converted to ->read_skb(). Signed-off-by: Cong Wang <cong.wang@bytedance.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: John Fastabend <john.fastabend@gmail.com> Link: https://lore.kernel.org/bpf/20220615162014.89193-3-xiyou.wangcong@gmail.com
Diffstat (limited to 'include/linux/net.h')
-rw-r--r--include/linux/net.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/net.h b/include/linux/net.h
index 12093f4db50c..a03485e8cbb2 100644
--- a/include/linux/net.h
+++ b/include/linux/net.h
@@ -152,6 +152,8 @@ struct module;
struct sk_buff;
typedef int (*sk_read_actor_t)(read_descriptor_t *, struct sk_buff *,
unsigned int, size_t);
+typedef int (*skb_read_actor_t)(struct sock *, struct sk_buff *);
+
struct proto_ops {
int family;
@@ -214,6 +216,8 @@ struct proto_ops {
*/
int (*read_sock)(struct sock *sk, read_descriptor_t *desc,
sk_read_actor_t recv_actor);
+ /* This is different from read_sock(), it reads an entire skb at a time. */
+ int (*read_skb)(struct sock *sk, skb_read_actor_t recv_actor);
int (*sendpage_locked)(struct sock *sk, struct page *page,
int offset, size_t size, int flags);
int (*sendmsg_locked)(struct sock *sk, struct msghdr *msg,