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l2tp: replace hlist with simple list for per-tunnel session list

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The per-tunnel session list is no longer used by the
datapath. However, we still need a list of sessions in the tunnel for
l2tp_session_get_nth, which is used by management code. (An
alternative might be to walk each session IDR list, matching only
sessions of a given tunnel.)

Replace the per-tunnel hlist with a per-tunnel list. In functions
which walk a list of sessions of a tunnel, walk this list instead.

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 12:22:44 +01:00
committed by David S. Miller
parent 8c6245af4f
commit d18d3f0a24
3 changed files with 49 additions and 90 deletions
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13
net/l2tp/l2tp_debugfs.c
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@@ -123,17 +123,14 @@ static void l2tp_dfs_seq_tunnel_show(struct seq_file *m, void *v)
struct l2tp_tunnel *tunnel = v;
struct l2tp_session *session;
int session_count = 0;
int hash;
rcu_read_lock_bh();
for (hash = 0; hash < L2TP_HASH_SIZE; hash++) {
hlist_for_each_entry_rcu(session, &tunnel->session_hlist[hash], hlist) {
/* Session ID of zero is a dummy/reserved value used by pppol2tp */
if (session->session_id == 0)
continue;
list_for_each_entry_rcu(session, &tunnel->session_list, list) {
/* Session ID of zero is a dummy/reserved value used by pppol2tp */
if (session->session_id == 0)
continue;
session_count++;
}
session_count++;
}
rcu_read_unlock_bh();