Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 232 insertions, 0 deletions

diff --git a/Documentation/networking/nf_conntrack-sysctl.rst b/Documentation/networking/nf_conntrack-sysctl.rst
new file mode 100644
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+++ b/Documentation/networking/nf_conntrack-sysctl.rst
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+.. SPDX-License-Identifier: GPL-2.0
+
+===================================
+Netfilter Conntrack Sysfs variables
+===================================
+
+/proc/sys/net/netfilter/nf_conntrack_* Variables:
+=================================================
+
+nf_conntrack_acct - BOOLEAN
+	- 0 - disabled (default)
+	- not 0 - enabled
+
+	Enable connection tracking flow accounting. 64-bit byte and packet
+	counters per flow are added.
+
+nf_conntrack_buckets - INTEGER
+	Size of hash table. If not specified as parameter during module
+	loading, the default size is calculated by dividing total memory
+	by 16384 to determine the number of buckets. The hash table will
+	never have fewer than 1024 and never more than 262144 buckets.
+	This sysctl is only writeable in the initial net namespace.
+
+nf_conntrack_checksum - BOOLEAN
+	- 0 - disabled
+	- not 0 - enabled (default)
+
+	Verify checksum of incoming packets. Packets with bad checksums are
+	in INVALID state. If this is enabled, such packets will not be
+	considered for connection tracking.
+
+nf_conntrack_count - INTEGER (read-only)
+	Number of currently allocated flow entries.
+
+nf_conntrack_events - BOOLEAN
+	- 0 - disabled
+	- 1 - enabled
+	- 2 - auto (default)
+
+	If this option is enabled, the connection tracking code will
+	provide userspace with connection tracking events via ctnetlink.
+	The default allocates the extension if a userspace program is
+	listening to ctnetlink events.
+
+nf_conntrack_expect_max - INTEGER
+	Maximum size of expectation table.  Default value is
+	nf_conntrack_buckets / 256. Minimum is 1.
+
+nf_conntrack_frag6_high_thresh - INTEGER
+	default 262144
+
+	Maximum memory used to reassemble IPv6 fragments.  When
+	nf_conntrack_frag6_high_thresh bytes of memory is allocated for this
+	purpose, the fragment handler will toss packets until
+	nf_conntrack_frag6_low_thresh is reached.
+
+nf_conntrack_frag6_low_thresh - INTEGER
+	default 196608
+
+	See nf_conntrack_frag6_low_thresh
+
+nf_conntrack_frag6_timeout - INTEGER (seconds)
+	default 60
+
+	Time to keep an IPv6 fragment in memory.
+
+nf_conntrack_generic_timeout - INTEGER (seconds)
+	default 600
+
+	Default for generic timeout.  This refers to layer 4 unknown/unsupported
+	protocols.
+
+nf_conntrack_icmp_timeout - INTEGER (seconds)
+	default 30
+
+	Default for ICMP timeout.
+
+nf_conntrack_icmpv6_timeout - INTEGER (seconds)
+	default 30
+
+	Default for ICMP6 timeout.
+
+nf_conntrack_log_invalid - INTEGER
+	- 0   - disable (default)
+	- 1   - log ICMP packets
+	- 6   - log TCP packets
+	- 17  - log UDP packets
+	- 33  - log DCCP packets
+	- 41  - log ICMPv6 packets
+	- 136 - log UDPLITE packets
+	- 255 - log packets of any protocol
+
+	Log invalid packets of a type specified by value.
+
+nf_conntrack_max - INTEGER
+        Maximum number of allowed connection tracking entries. This value is set
+        to nf_conntrack_buckets by default.
+        Note that connection tracking entries are added to the table twice -- once
+        for the original direction and once for the reply direction (i.e., with
+        the reversed address). This means that with default settings a maxed-out
+        table will have a average hash chain length of 2, not 1.
+
+nf_conntrack_tcp_be_liberal - BOOLEAN
+	- 0 - disabled (default)
+	- not 0 - enabled
+
+	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.
+
+nf_conntrack_tcp_ignore_invalid_rst - BOOLEAN
+	- 0 - disabled (default)
+	- 1 - enabled
+
+	If it's 1, we don't mark out of window RST segments as INVALID.
+
+nf_conntrack_tcp_loose - BOOLEAN
+	- 0 - disabled
+	- not 0 - enabled (default)
+
+	If it is set to zero, we disable picking up already established
+	connections.
+
+nf_conntrack_tcp_max_retrans - INTEGER
+	default 3
+
+	Maximum number of packets that can be retransmitted without
+	received an (acceptable) ACK from the destination. If this number
+	is reached, a shorter timer will be started.
+
+nf_conntrack_tcp_timeout_close - INTEGER (seconds)
+	default 10
+
+nf_conntrack_tcp_timeout_close_wait - INTEGER (seconds)
+	default 60
+
+nf_conntrack_tcp_timeout_established - INTEGER (seconds)
+	default 432000 (5 days)
+
+nf_conntrack_tcp_timeout_fin_wait - INTEGER (seconds)
+	default 120
+
+nf_conntrack_tcp_timeout_last_ack - INTEGER (seconds)
+	default 30
+
+nf_conntrack_tcp_timeout_max_retrans - INTEGER (seconds)
+	default 300
+
+nf_conntrack_tcp_timeout_syn_recv - INTEGER (seconds)
+	default 60
+
+nf_conntrack_tcp_timeout_syn_sent - INTEGER (seconds)
+	default 120
+
+nf_conntrack_tcp_timeout_time_wait - INTEGER (seconds)
+	default 120
+
+nf_conntrack_tcp_timeout_unacknowledged - INTEGER (seconds)
+	default 300
+
+nf_conntrack_timestamp - BOOLEAN
+	- 0 - disabled (default)
+	- not 0 - enabled
+
+	Enable connection tracking flow timestamping.
+
+nf_conntrack_sctp_timeout_closed - INTEGER (seconds)
+	default 10
+
+nf_conntrack_sctp_timeout_cookie_wait - INTEGER (seconds)
+	default 3
+
+nf_conntrack_sctp_timeout_cookie_echoed - INTEGER (seconds)
+	default 3
+
+nf_conntrack_sctp_timeout_established - INTEGER (seconds)
+	default 210
+
+	Default is set to (hb_interval * path_max_retrans + rto_max)
+
+nf_conntrack_sctp_timeout_shutdown_sent - INTEGER (seconds)
+	default 3
+
+nf_conntrack_sctp_timeout_shutdown_recd - INTEGER (seconds)
+	default 3
+
+nf_conntrack_sctp_timeout_shutdown_ack_sent - INTEGER (seconds)
+	default 3
+
+nf_conntrack_sctp_timeout_heartbeat_sent - INTEGER (seconds)
+	default 30
+
+	This timeout is used to setup conntrack entry on secondary paths.
+	Default is set to hb_interval.
+
+nf_conntrack_udp_timeout - INTEGER (seconds)
+	default 30
+
+nf_conntrack_udp_timeout_stream - INTEGER (seconds)
+	default 120
+
+	This extended timeout will be used in case there is an UDP stream
+	detected.
+
+nf_conntrack_gre_timeout - INTEGER (seconds)
+	default 30
+
+nf_conntrack_gre_timeout_stream - INTEGER (seconds)
+	default 180
+
+	This extended timeout will be used in case there is an GRE stream
+	detected.
+
+nf_hooks_lwtunnel - BOOLEAN
+	- 0 - disabled (default)
+	- not 0 - enabled
+
+	If this option is enabled, the lightweight tunnel netfilter hooks are
+	enabled. This option cannot be disabled once it is enabled.
+
+nf_flowtable_tcp_timeout - INTEGER (seconds)
+        default 30
+
+        Control offload timeout for tcp connections.
+        TCP connections may be offloaded from nf conntrack to nf flow table.
+        Once aged, the connection is returned to nf conntrack with tcp pickup timeout.
+
+nf_flowtable_udp_timeout - INTEGER (seconds)
+        default 30
+
+        Control offload timeout for udp connections.
+        UDP connections may be offloaded from nf conntrack to nf flow table.
+        Once aged, the connection is returned to nf conntrack with udp pickup timeout.