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authorFelix Fietkau <nbd@nbd.name>2023-03-30 14:14:11 +0200
committerFelix Fietkau <nbd@nbd.name>2023-03-30 14:15:35 +0200
commit75e78bcaab847557ce1782eb2dea9dff9a029171 (patch)
tree2eae4f9f4af826dabbb700efa037fab678dac7c9 /target/linux/generic/pending-5.10
parentd54c91bd9ab3c54ee06923eafbd67047816a37e4 (diff)
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kernel: remove obsolete netfilter tcp window size check bypass patch
On any currently supported hardware, the performance impact should not matter anymore. Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'target/linux/generic/pending-5.10')
-rw-r--r--target/linux/generic/pending-5.10/613-netfilter_optional_tcp_window_check.patch73
1 files changed, 0 insertions, 73 deletions
diff --git a/target/linux/generic/pending-5.10/613-netfilter_optional_tcp_window_check.patch b/target/linux/generic/pending-5.10/613-netfilter_optional_tcp_window_check.patch
deleted file mode 100644
index 79fd2762b3..0000000000
--- a/target/linux/generic/pending-5.10/613-netfilter_optional_tcp_window_check.patch
+++ /dev/null
@@ -1,73 +0,0 @@
-From: Felix Fietkau <nbd@nbd.name>
-Subject: netfilter: optional tcp window check
-
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
----
- net/netfilter/nf_conntrack_proto_tcp.c | 13 +++++++++++++
- 1 file changed, 13 insertions(+)
-
---- a/net/netfilter/nf_conntrack_proto_tcp.c
-+++ b/net/netfilter/nf_conntrack_proto_tcp.c
-@@ -31,6 +31,9 @@
- #include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
- #include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
-
-+/* Do not check the TCP window for incoming packets */
-+static int nf_ct_tcp_no_window_check __read_mostly = 1;
-+
- /* "Be conservative in what you do,
- be liberal in what you accept from others."
- If it's non-zero, we mark only out of window RST segments as INVALID. */
-@@ -476,6 +479,9 @@ static bool tcp_in_window(const struct n
- s32 receiver_offset;
- bool res, in_recv_win;
-
-+ if (nf_ct_tcp_no_window_check)
-+ return true;
-+
- /*
- * Get the required data from the packet.
- */
-@@ -1139,7 +1145,7 @@ int nf_conntrack_tcp_packet(struct nf_co
- IP_CT_TCP_FLAG_DATA_UNACKNOWLEDGED &&
- timeouts[new_state] > timeouts[TCP_CONNTRACK_UNACK])
- timeout = timeouts[TCP_CONNTRACK_UNACK];
-- else if (ct->proto.tcp.last_win == 0 &&
-+ else if (!nf_ct_tcp_no_window_check && ct->proto.tcp.last_win == 0 &&
- timeouts[new_state] > timeouts[TCP_CONNTRACK_RETRANS])
- timeout = timeouts[TCP_CONNTRACK_RETRANS];
- else
---- a/net/netfilter/nf_conntrack_standalone.c
-+++ b/net/netfilter/nf_conntrack_standalone.c
-@@ -25,6 +25,9 @@
- #include <net/netfilter/nf_conntrack_timestamp.h>
- #include <linux/rculist_nulls.h>
-
-+/* Do not check the TCP window for incoming packets */
-+static int nf_ct_tcp_no_window_check __read_mostly = 1;
-+
- static bool enable_hooks __read_mostly;
- MODULE_PARM_DESC(enable_hooks, "Always enable conntrack hooks");
- module_param(enable_hooks, bool, 0000);
-@@ -657,6 +660,7 @@ enum nf_ct_sysctl_index {
- NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM,
- #endif
-
-+ NF_SYSCTL_CT_PROTO_TCP_NO_WINDOW_CHECK,
- __NF_SYSCTL_CT_LAST_SYSCTL,
- };
-
-@@ -993,6 +997,13 @@ static struct ctl_table nf_ct_sysctl_tab
- .proc_handler = proc_dointvec_jiffies,
- },
- #endif
-+ [NF_SYSCTL_CT_PROTO_TCP_NO_WINDOW_CHECK] = {
-+ .procname = "nf_conntrack_tcp_no_window_check",
-+ .data = &nf_ct_tcp_no_window_check,
-+ .maxlen = sizeof(unsigned int),
-+ .mode = 0644,
-+ .proc_handler = proc_dointvec,
-+ },
- {}
- };
-