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[3/3] ipv4: add documentation of two sysctls about icmp

Message ID 20220822045622.203822-1-xu.xin16@zte.com.cn (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series Namespaceify two sysctls related with route | expand

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netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
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netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
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netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 23 lines checked
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Commit Message

CGEL Aug. 22, 2022, 4:56 a.m. UTC 
From: xu xin <xu.xin16@zte.com.cn>

Add the descriptions of the sysctls of error_cost and error_burst in
Documentation/networking/ip-sysctl.rst.

Signed-off-by: xu xin <xu.xin16@zte.com.cn>
Reviewed-by: Yunkai Zhang <zhang.yunkai@zte.com.cn>
Signed-off-by: CGEL ZTE <cgel.zte@gmail.com>
---
 Documentation/networking/ip-sysctl.rst | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
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Patch

diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst
index 56cd4ea059b2..c113a34a4115 100644
--- a/Documentation/networking/ip-sysctl.rst
+++ b/Documentation/networking/ip-sysctl.rst
@@ -156,6 +156,23 @@  route/max_size - INTEGER
 	From linux kernel 3.6 onwards, this is deprecated for ipv4
 	as route cache is no longer used.
 
+route/error_cost - INTEGER
+	The minimum time interval between two consecutive ICMP-DEST-
+	UNREACHABLE packets allowed sent to the same peer in the stable
+	period. Basically, The higher its value is, the lower the general
+	frequency of sending ICMP DEST-UNREACHABLE packets.
+
+	Default: HZ (one second)
+
+route/error_burst - INTEGER
+	Together with error_cost, it controls the max number of burstly
+	sent ICMP DEST-UNREACHABLE packets after a long calm time (no
+	sending ICMP DEST-UNREACHABLE). Basically, the higher the rate
+	of error_burst over error_cost is, the more allowed burstly sent
+	ICMP DEST-UNREACHABLE packets after a long calm time.
+
+	Default: 5 * HZ
+
 neigh/default/gc_thresh1 - INTEGER
 	Minimum number of entries to keep.  Garbage collector will not
 	purge entries if there are fewer than this number.