Merge branch 'smc-sysctl-formatting-and-missing-entries'

Kyoji Ogasawara says:

====================
smc-sysctl formatting and missing entries

update SMC sysctl documentation in two small steps.

- patch 1 fixes indentation in the smcr_buf_type section
- patch 2 documents missing sysctl parameters limit_smc_hs and hs_ctrl,
  including values/defaults and hs_ctrl usage notes
====================

Link: https://patch.msgid.link/20260309124541.22723-1-sawara04.o@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 35 insertions, 8 deletions

diff --git a/Documentation/networking/smc-sysctl.rst b/Documentation/networking/smc-sysctl.rst
index 904a910f198e..a8b4f357174e 100644
--- a/Documentation/networking/smc-sysctl.rst
+++ b/Documentation/networking/smc-sysctl.rst
@@ -23,17 +23,17 @@ autocorking_size - INTEGER
 	Default: 64K
 
 smcr_buf_type - INTEGER
-        Controls which type of sndbufs and RMBs to use in later newly created
-        SMC-R link group. Only for SMC-R.
+	Controls which type of sndbufs and RMBs to use in later newly created
+	SMC-R link group. Only for SMC-R.
 
-        Default: 0 (physically contiguous sndbufs and RMBs)
+	Default: 0 (physically contiguous sndbufs and RMBs)
 
-        Possible values:
+	Possible values:
 
-        - 0 - Use physically contiguous buffers
-        - 1 - Use virtually contiguous buffers
-        - 2 - Mixed use of the two types. Try physically contiguous buffers first.
-          If not available, use virtually contiguous buffers then.
+	- 0 - Use physically contiguous buffers
+	- 1 - Use virtually contiguous buffers
+	- 2 - Mixed use of the two types. Try physically contiguous buffers first.
+	  If not available, use virtually contiguous buffers then.
 
 smcr_testlink_time - INTEGER
 	How frequently SMC-R link sends out TEST_LINK LLC messages to confirm
@@ -111,3 +111,30 @@ smcr_max_recv_wr - INTEGER
 	like before having this control.
 
 	Default: 48
+
+limit_smc_hs - INTEGER
+	Whether to limit SMC handshake for newly created sockets.
+
+	When enabled, SMC listen path applies handshake limitation based on
+	handshake worker congestion and queued SMC handshake load.
+
+	Possible values:
+
+	- 0 - Disable handshake limitation
+	- 1 - Enable handshake limitation
+
+	Default: 0 (disable)
+
+hs_ctrl - STRING
+	Select the SMC handshake control profile by name.
+
+	This string refers to the name of a user-implemented
+	BPF struct_ops instance of type smc_hs_ctrl.
+
+	The selected profile controls whether SMC options are advertised
+	during TCP SYN/SYN-ACK handshake.
+
+	Only available when CONFIG_SMC_HS_CTRL_BPF is enabled.
+	Write an empty string to clear the current profile.
+
+	Default: empty string