kernel: delete Linux 5.4 config and patches

As the upcoming release will be based on Linux 5.10 only, remove all
kernel configuration as well as patches for Linux 5.4.
There were no targets still actively using Linux 5.4.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

1 files changed, 0 insertions, 114 deletions

diff --git a/target/linux/generic/backport-5.4/370-netfilter-nf_flow_table-fix-offloaded-connection-tim.patch b/target/linux/generic/backport-5.4/370-netfilter-nf_flow_table-fix-offloaded-connection-tim.patch
deleted file mode 100644
index 373a156429..0000000000
--- a/target/linux/generic/backport-5.4/370-netfilter-nf_flow_table-fix-offloaded-connection-tim.patch
+++ /dev/null
@@ -1,114 +0,0 @@
-From: Felix Fietkau <nbd@nbd.name>
-Date: Wed, 13 Jun 2018 12:33:39 +0200
-Subject: [PATCH] netfilter: nf_flow_table: fix offloaded connection timeout
- corner case
-
-The full teardown of offloaded flows is deferred to a gc work item,
-however processing of packets by netfilter needs to happen immediately
-after a teardown is requested, because the conntrack state needs to be
-fixed up.
-
-Since the IPS_OFFLOAD_BIT is still kept until the teardown is complete,
-the netfilter conntrack gc can accidentally bump the timeout of a
-connection where offload was just stopped, causing a conntrack entry
-leak.
-
-Fix this by moving the conntrack timeout bumping from conntrack core to
-the nf_flow_offload and add a check to prevent bogus timeout bumps.
-
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
----
-
---- a/net/netfilter/nf_conntrack_core.c
-+++ b/net/netfilter/nf_conntrack_core.c
-@@ -1207,18 +1207,6 @@ static bool gc_worker_can_early_drop(con
- 	return false;
- }
- 
--#define	DAY	(86400 * HZ)
--
--/* Set an arbitrary timeout large enough not to ever expire, this save
-- * us a check for the IPS_OFFLOAD_BIT from the packet path via
-- * nf_ct_is_expired().
-- */
--static void nf_ct_offload_timeout(struct nf_conn *ct)
--{
--	if (nf_ct_expires(ct) < DAY / 2)
--		ct->timeout = nfct_time_stamp + DAY;
--}
--
- static void gc_worker(struct work_struct *work)
- {
- 	unsigned long end_time = jiffies + GC_SCAN_MAX_DURATION;
-@@ -1250,10 +1238,8 @@ static void gc_worker(struct work_struct
- 
- 			tmp = nf_ct_tuplehash_to_ctrack(h);
- 
--			if (test_bit(IPS_OFFLOAD_BIT, &tmp->status)) {
--				nf_ct_offload_timeout(tmp);
-+			if (test_bit(IPS_OFFLOAD_BIT, &tmp->status))
- 				continue;
--			}
- 
- 			if (nf_ct_is_expired(tmp)) {
- 				nf_ct_gc_expired(tmp);
---- a/net/netfilter/nf_flow_table_core.c
-+++ b/net/netfilter/nf_flow_table_core.c
-@@ -198,10 +198,29 @@ static const struct rhashtable_params nf
- 	.automatic_shrinking	= true,
- };
- 
-+#define        DAY     (86400 * HZ)
-+
-+/* Set an arbitrary timeout large enough not to ever expire, this save
-+ * us a check for the IPS_OFFLOAD_BIT from the packet path via
-+ * nf_ct_is_expired().
-+ */
-+static void nf_ct_offload_timeout(struct flow_offload *flow)
-+{
-+	struct flow_offload_entry *entry;
-+	struct nf_conn *ct;
-+
-+	entry = container_of(flow, struct flow_offload_entry, flow);
-+	ct = entry->ct;
-+
-+	if (nf_ct_expires(ct) < DAY / 2)
-+		ct->timeout = nfct_time_stamp + DAY;
-+}
-+
- int flow_offload_add(struct nf_flowtable *flow_table, struct flow_offload *flow)
- {
- 	int err;
- 
-+	nf_ct_offload_timeout(flow);
- 	flow->timeout = (u32)jiffies + NF_FLOW_TIMEOUT;
- 
- 	err = rhashtable_insert_fast(&flow_table->rhashtable,
-@@ -304,6 +323,7 @@ nf_flow_table_iterate(struct nf_flowtabl
- 	rhashtable_walk_start(&hti);
- 
- 	while ((tuplehash = rhashtable_walk_next(&hti))) {
-+
- 		if (IS_ERR(tuplehash)) {
- 			if (PTR_ERR(tuplehash) != -EAGAIN) {
- 				err = PTR_ERR(tuplehash);
-@@ -328,10 +348,17 @@ static void nf_flow_offload_gc_step(stru
- {
- 	struct nf_flowtable *flow_table = data;
- 	struct flow_offload_entry *e;
-+	bool teardown;
- 
- 	e = container_of(flow, struct flow_offload_entry, flow);
--	if (nf_flow_has_expired(flow) || nf_ct_is_dying(e->ct) ||
--	    (flow->flags & (FLOW_OFFLOAD_DYING | FLOW_OFFLOAD_TEARDOWN)))
-+
-+	teardown = flow->flags & (FLOW_OFFLOAD_DYING |
-+				  FLOW_OFFLOAD_TEARDOWN);
-+
-+	if (!teardown)
-+		nf_ct_offload_timeout(flow);
-+
-+	if (nf_flow_has_expired(flow) || teardown)
- 		flow_offload_del(flow_table, flow);
- }
-