selftests: mptcp: join: no RST when rm subflow/addr

Recently, we noticed that some RST were wrongly generated when removing
the initial subflow.

This patch makes sure RST are not sent when removing any subflows or any
addresses.

Fixes: c2b2ae3 ("mptcp: handle correctly disconnect() failures")
Cc: stable@vger.kernel.org
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Matthieu Baerts <matttbe@kernel.org>
Signed-off-by: Mat Martineau <martineau@kernel.org>
Link: https://lore.kernel.org/r/20231018-send-net-20231018-v1-5-17ecb002e41d@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

tools/testing/selftests/net/mptcp/mptcp_join.sh

@@ -2309,6 +2309,7 @@ remove_tests()
 		chk_join_nr 1 1 1
 		chk_rm_tx_nr 1
 		chk_rm_nr 1 1
+		chk_rst_nr 0 0
 	fi
 
 	# multiple subflows, remove
@@ -2321,6 +2322,7 @@ remove_tests()
 			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 2 2 2
 		chk_rm_nr 2 2
+		chk_rst_nr 0 0
 	fi
 
 	# single address, remove
@@ -2333,6 +2335,7 @@ remove_tests()
 		chk_join_nr 1 1 1
 		chk_add_nr 1 1
 		chk_rm_nr 1 1 invert
+		chk_rst_nr 0 0
 	fi
 
 	# subflow and signal, remove
@@ -2346,6 +2349,7 @@ remove_tests()
 		chk_join_nr 2 2 2
 		chk_add_nr 1 1
 		chk_rm_nr 1 1
+		chk_rst_nr 0 0
 	fi
 
 	# subflows and signal, remove
@@ -2360,6 +2364,7 @@ remove_tests()
 		chk_join_nr 3 3 3
 		chk_add_nr 1 1
 		chk_rm_nr 2 2
+		chk_rst_nr 0 0
 	fi
 
 	# addresses remove
@@ -2374,6 +2379,7 @@ remove_tests()
 		chk_join_nr 3 3 3
 		chk_add_nr 3 3
 		chk_rm_nr 3 3 invert
+		chk_rst_nr 0 0
 	fi
 
 	# invalid addresses remove
@@ -2388,6 +2394,7 @@ remove_tests()
 		chk_join_nr 1 1 1
 		chk_add_nr 3 3
 		chk_rm_nr 3 1 invert
+		chk_rst_nr 0 0
 	fi
 
 	# subflows and signal, flush
@@ -2402,6 +2409,7 @@ remove_tests()
 		chk_join_nr 3 3 3
 		chk_add_nr 1 1
 		chk_rm_nr 1 3 invert simult
+		chk_rst_nr 0 0
 	fi
 
 	# subflows flush
@@ -2421,6 +2429,7 @@ remove_tests()
 		else
 			chk_rm_nr 3 3
 		fi
+		chk_rst_nr 0 0
 	fi
 
 	# addresses flush
@@ -2435,6 +2444,7 @@ remove_tests()
 		chk_join_nr 3 3 3
 		chk_add_nr 3 3
 		chk_rm_nr 3 3 invert simult
+		chk_rst_nr 0 0
 	fi
 
 	# invalid addresses flush
@@ -2449,6 +2459,7 @@ remove_tests()
 		chk_join_nr 1 1 1
 		chk_add_nr 3 3
 		chk_rm_nr 3 1 invert
+		chk_rst_nr 0 0
 	fi
 
 	# remove id 0 subflow
@@ -2460,6 +2471,7 @@ remove_tests()
 			run_tests $ns1 $ns2 10.0.1.1
 		chk_join_nr 1 1 1
 		chk_rm_nr 1 1
+		chk_rst_nr 0 0
 	fi
 
 	# remove id 0 address
@@ -2472,6 +2484,7 @@ remove_tests()
 		chk_join_nr 1 1 1
 		chk_add_nr 1 1
 		chk_rm_nr 1 1 invert
+		chk_rst_nr 0 0 invert
 	fi
 }