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l2tp: use IDR for all session lookups

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Add generic session getter which uses IDR. Replace all users of
l2tp_tunnel_get_session which uses the per-tunnel session list to use
the generic getter.

Signed-off-by: James Chapman <jchapman@katalix.com>
Reviewed-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
James Chapman 2024-06-20 12:22:42 +01:00 committed by David S. Miller
parent c37e0138ca
commit 5f77c18ea5
4 changed files with 20 additions and 4 deletions
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10
net/l2tp/l2tp_core.c
View File

@ -316,6 +316,16 @@ struct l2tp_session *l2tp_v2_session_get(const struct net *net, u16 tunnel_id, u
}
EXPORT_SYMBOL_GPL(l2tp_v2_session_get);
struct l2tp_session *l2tp_session_get(const struct net *net, struct sock *sk, int pver,
u32 tunnel_id, u32 session_id)
{
if (pver == L2TP_HDR_VER_2)
return l2tp_v2_session_get(net, tunnel_id, session_id);
else
return l2tp_v3_session_get(net, sk, session_id);
}
EXPORT_SYMBOL_GPL(l2tp_session_get);
struct l2tp_session *l2tp_session_get_nth(struct l2tp_tunnel *tunnel, int nth)
{
int hash;

2
net/l2tp/l2tp_core.h
View File

@ -232,6 +232,8 @@ struct l2tp_session *l2tp_tunnel_get_session(struct l2tp_tunnel *tunnel,
struct l2tp_session *l2tp_v3_session_get(const struct net *net, struct sock *sk, u32 session_id);
struct l2tp_session *l2tp_v2_session_get(const struct net *net, u16 tunnel_id, u16 session_id);
struct l2tp_session *l2tp_session_get(const struct net *net, struct sock *sk, int pver,
u32 tunnel_id, u32 session_id);
struct l2tp_session *l2tp_session_get_nth(struct l2tp_tunnel *tunnel, int nth);
struct l2tp_session *l2tp_session_get_by_ifname(const struct net *net,
const char *ifname);

6
net/l2tp/l2tp_netlink.c
View File

@ -61,7 +61,8 @@ static struct l2tp_session *l2tp_nl_session_get(struct genl_info *info)
session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]);
tunnel = l2tp_tunnel_get(net, tunnel_id);
if (tunnel) {
session = l2tp_tunnel_get_session(tunnel, session_id);
session = l2tp_session_get(net, tunnel->sock, tunnel->version,
tunnel_id, session_id);
l2tp_tunnel_dec_refcount(tunnel);
}
}
@ -635,7 +636,8 @@ static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *inf
&cfg);
if (ret >= 0) {
session = l2tp_tunnel_get_session(tunnel, session_id);
session = l2tp_session_get(net, tunnel->sock, tunnel->version,
tunnel_id, session_id);
if (session) {
ret = l2tp_session_notify(&l2tp_nl_family, info, session,
L2TP_CMD_SESSION_CREATE);

6
net/l2tp/l2tp_ppp.c
View File

@ -753,7 +753,8 @@ static int pppol2tp_connect(struct socket *sock, struct sockaddr *uservaddr,
if (tunnel->peer_tunnel_id == 0)
tunnel->peer_tunnel_id = info.peer_tunnel_id;
session = l2tp_tunnel_get_session(tunnel, info.session_id);
session = l2tp_session_get(sock_net(sk), tunnel->sock, tunnel->version,
info.tunnel_id, info.session_id);
if (session) {
drop_refcnt = true;
@ -1045,7 +1046,8 @@ static int pppol2tp_tunnel_copy_stats(struct pppol2tp_ioc_stats *stats,
/* If session_id is set, search the corresponding session in the
* context of this tunnel and record the session's statistics.
*/
session = l2tp_tunnel_get_session(tunnel, stats->session_id);
session = l2tp_session_get(tunnel->l2tp_net, tunnel->sock, tunnel->version,
tunnel->tunnel_id, stats->session_id);
if (!session)
return -EBADR;