selftests: mptcp: fix wait_rm_addr/sf parameters

The second input parameter of 'wait_rm_addr/sf $1 1' is misused. If it's
1, wait_rm_addr/sf will never break, and will loop ten times, then
'wait_rm_addr/sf' equals to 'sleep 1'. This delay time is too long,
which can sometimes make the tests fail.

A better way to use wait_rm_addr/sf is to use rm_addr/sf_count to obtain
the current value, and then pass into wait_rm_addr/sf.

Fixes: 4369c198 ("selftests: mptcp: test userspace pm out of transfer")
Cc: stable@vger.kernel.org
Suggested-by: Matthieu Baerts <matttbe@kernel.org>
Reviewed-by: Matthieu Baerts <matttbe@kernel.org>
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <martineau@kernel.org>
Link: https://lore.kernel.org/r/20231025-send-net-next-20231025-v1-2-db8f25f798eb@kernel.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

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

@@ -3289,6 +3289,7 @@ userspace_pm_rm_sf_addr_ns1()
 	local addr=$1
 	local id=$2
 	local tk sp da dp
+	local cnt_addr cnt_sf
 
 	tk=$(grep "type:1," "$evts_ns1" |
 	     sed -n 's/.*\(token:\)\([[:digit:]]*\).*$/\2/p;q')
@@ -3298,11 +3299,13 @@ userspace_pm_rm_sf_addr_ns1()
 	     sed -n 's/.*\(daddr6:\)\([0-9a-f:.]*\).*$/\2/p;q')
 	dp=$(grep "type:10" "$evts_ns1" |
 	     sed -n 's/.*\(dport:\)\([[:digit:]]*\).*$/\2/p;q')
+	cnt_addr=$(rm_addr_count ${ns1})
+	cnt_sf=$(rm_sf_count ${ns1})
 	ip netns exec $ns1 ./pm_nl_ctl rem token $tk id $id
 	ip netns exec $ns1 ./pm_nl_ctl dsf lip "::ffff:$addr" \
 				lport $sp rip $da rport $dp token $tk
-	wait_rm_addr $ns1 1
-	wait_rm_sf $ns1 1
+	wait_rm_addr $ns1 "${cnt_addr}"
+	wait_rm_sf $ns1 "${cnt_sf}"
 }
 
 userspace_pm_add_sf()
@@ -3324,17 +3327,20 @@ userspace_pm_rm_sf_addr_ns2()
 	local addr=$1
 	local id=$2
 	local tk da dp sp
+	local cnt_addr cnt_sf
 
 	tk=$(sed -n 's/.*\(token:\)\([[:digit:]]*\).*$/\2/p;q' "$evts_ns2")
 	da=$(sed -n 's/.*\(daddr4:\)\([0-9.]*\).*$/\2/p;q' "$evts_ns2")
 	dp=$(sed -n 's/.*\(dport:\)\([[:digit:]]*\).*$/\2/p;q' "$evts_ns2")
 	sp=$(grep "type:10" "$evts_ns2" |
 	     sed -n 's/.*\(sport:\)\([[:digit:]]*\).*$/\2/p;q')
+	cnt_addr=$(rm_addr_count ${ns2})
+	cnt_sf=$(rm_sf_count ${ns2})
 	ip netns exec $ns2 ./pm_nl_ctl rem token $tk id $id
 	ip netns exec $ns2 ./pm_nl_ctl dsf lip $addr lport $sp \
 				rip $da rport $dp token $tk
-	wait_rm_addr $ns2 1
-	wait_rm_sf $ns2 1
+	wait_rm_addr $ns2 "${cnt_addr}"
+	wait_rm_sf $ns2 "${cnt_sf}"
 }
 
 userspace_tests()