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authorTom Parkin <tparkin@katalix.com>2020-07-28 18:20:31 +0100
committerDavid S. Miller <davem@davemloft.net>2020-07-30 16:45:31 -0700
commit2dedab6ff57edd29848391fa917a8f96c4f82583 (patch)
tree41cbb7bcc84e25b912c7ebd2dca34685724d81ee /net
parent628703f59dcc832a0bd04b4fa41d856e5df98112 (diff)
l2tp: remove build_header callback in struct l2tp_session
The structure of an L2TP data packet header varies depending on the version of the L2TP protocol being used. struct l2tp_session used to have a build_header callback to abstract this difference away. It's clearer to simply choose the correct function to use when building the data packet (and we save on the function pointer in the session structure). This approach does mean dereferencing the parent tunnel structure in order to determine the tunnel version, but we're doing that in the transmit path in any case. Signed-off-by: Tom Parkin <tparkin@katalix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/l2tp/l2tp_core.c10
-rw-r--r--net/l2tp/l2tp_core.h1
2 files changed, 4 insertions, 7 deletions
diff --git a/net/l2tp/l2tp_core.c b/net/l2tp/l2tp_core.c
index 690dcbc30472..3992af139479 100644
--- a/net/l2tp/l2tp_core.c
+++ b/net/l2tp/l2tp_core.c
@@ -1116,7 +1116,10 @@ int l2tp_xmit_skb(struct l2tp_session *session, struct sk_buff *skb, int hdr_len
}
/* Setup L2TP header */
- session->build_header(session, __skb_push(skb, hdr_len));
+ if (tunnel->version == L2TP_HDR_VER_2)
+ l2tp_build_l2tpv2_header(session, __skb_push(skb, hdr_len));
+ else
+ l2tp_build_l2tpv3_header(session, __skb_push(skb, hdr_len));
/* Reset skb netfilter state */
memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
@@ -1700,11 +1703,6 @@ struct l2tp_session *l2tp_session_create(int priv_size, struct l2tp_tunnel *tunn
memcpy(&session->peer_cookie[0], &cfg->peer_cookie[0], cfg->peer_cookie_len);
}
- if (tunnel->version == L2TP_HDR_VER_2)
- session->build_header = l2tp_build_l2tpv2_header;
- else
- session->build_header = l2tp_build_l2tpv3_header;
-
l2tp_session_set_header_len(session, tunnel->version);
refcount_set(&session->ref_count, 1);
diff --git a/net/l2tp/l2tp_core.h b/net/l2tp/l2tp_core.h
index 0c32981f0cd3..3dfd3ddd28fd 100644
--- a/net/l2tp/l2tp_core.h
+++ b/net/l2tp/l2tp_core.h
@@ -101,7 +101,6 @@ struct l2tp_session {
struct l2tp_stats stats;
struct hlist_node global_hlist; /* global hash list node */
- int (*build_header)(struct l2tp_session *session, void *buf);
void (*recv_skb)(struct l2tp_session *session, struct sk_buff *skb, int data_len);
void (*session_close)(struct l2tp_session *session);
void (*show)(struct seq_file *m, void *priv);