git: 0939f3a04653 - stable/13 - icmp: do not store per-VNET identical array of strings

The branch stable/13 has been updated by tuexen:

URL: https://cgit.FreeBSD.org/src/commit/?id=0939f3a046533a2df1d2b10fd914c98755dacb0b

commit 0939f3a046533a2df1d2b10fd914c98755dacb0b
Author:     Gleb Smirnoff <glebius@FreeBSD.org>
AuthorDate: 2024-03-24 16:13:23 +0000
Commit:     Michael Tuexen <tuexen@FreeBSD.org>
CommitDate: 2025-02-12 10:15:53 +0000

    icmp: do not store per-VNET identical array of strings
    
    We need per-VNET struct counter_rate, but we don't need per-VNET set of
    const char *.  Also, identical word "response" can go into the format
    string instead of being stored 7 times.
    
    Reviewed by:            kp, zlei, tuexen
    Differential Revision:  https://reviews.freebsd.org/D44475
    
    (cherry picked from commit 7142ab4790666022a2a3d85910e9cd8e241d9b87)
---
 sys/netinet/ip_icmp.c | 37 ++++++++++++++++++-------------------
 1 file changed, 18 insertions(+), 19 deletions(-)

diff --git a/sys/netinet/ip_icmp.c b/sys/netinet/ip_icmp.c
index f0e63d6c8b1a..54411d55f49c 100644
--- a/sys/netinet/ip_icmp.c
+++ b/sys/netinet/ip_icmp.c
@@ -1085,28 +1085,26 @@ ip_next_mtu(int mtu, int dir)
  *	the 'final' error, but it doesn't make sense to solve the printing
  *	delay with more complex code.
  */
-struct icmp_rate {
-	const char *descr;
-	struct counter_rate cr;
-};
-VNET_DEFINE_STATIC(struct icmp_rate, icmp_rates[BANDLIM_MAX]) = {
-	{ "icmp unreach response" },
-	{ "icmp ping response" },
-	{ "icmp tstamp response" },
-	{ "closed port RST response" },
-	{ "open port RST response" },
-	{ "icmp6 unreach response" },
-	{ "sctp ootb response" }
-};
+VNET_DEFINE_STATIC(struct counter_rate, icmp_rates[BANDLIM_MAX]);
 #define	V_icmp_rates	VNET(icmp_rates)
 
+static const char *icmp_rate_descrs[BANDLIM_MAX] = {
+	[BANDLIM_ICMP_UNREACH] = "icmp unreach",
+	[BANDLIM_ICMP_ECHO] = "icmp ping",
+	[BANDLIM_ICMP_TSTAMP] = "icmp tstamp",
+	[BANDLIM_RST_CLOSEDPORT] = "closed port RST",
+	[BANDLIM_RST_OPENPORT] = "open port RST",
+	[BANDLIM_ICMP6_UNREACH] = "icmp6 unreach",
+	[BANDLIM_SCTP_OOTB] = "sctp ootb",
+};
+
 static void
 icmp_bandlimit_init(void)
 {
 
 	for (int i = 0; i < BANDLIM_MAX; i++) {
-		V_icmp_rates[i].cr.cr_rate = counter_u64_alloc(M_WAITOK);
-		V_icmp_rates[i].cr.cr_ticks = ticks;
+		V_icmp_rates[i].cr_rate = counter_u64_alloc(M_WAITOK);
+		V_icmp_rates[i].cr_ticks = ticks;
 	}
 }
 VNET_SYSINIT(icmp_bandlimit, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY,
@@ -1117,7 +1115,7 @@ icmp_bandlimit_uninit(void)
 {
 
 	for (int i = 0; i < BANDLIM_MAX; i++)
-		counter_u64_free(V_icmp_rates[i].cr.cr_rate);
+		counter_u64_free(V_icmp_rates[i].cr_rate);
 }
 VNET_SYSUNINIT(icmp_bandlimit, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD,
     icmp_bandlimit_uninit, NULL);
@@ -1136,7 +1134,7 @@ badport_bandlim(int which)
 	if ((V_icmplim + V_icmplim_curr_jitter) <= 0)
 		V_icmplim_curr_jitter = -V_icmplim + 1;
 
-	pps = counter_ratecheck(&V_icmp_rates[which].cr, V_icmplim +
+	pps = counter_ratecheck(&V_icmp_rates[which], V_icmplim +
 	    V_icmplim_curr_jitter);
 	if (pps > 0) {
 		/*
@@ -1154,8 +1152,9 @@ badport_bandlim(int which)
 	if (pps == -1)
 		return (-1);
 	if (pps > 0 && V_icmplim_output)
-		log(LOG_NOTICE, "Limiting %s from %jd to %d packets/sec\n",
-		    V_icmp_rates[which].descr, (intmax_t )pps, V_icmplim +
+		log(LOG_NOTICE,
+		    "Limiting %s response from %jd to %d packets/sec\n",
+		    icmp_rate_descrs[which], (intmax_t )pps, V_icmplim +
 		    V_icmplim_curr_jitter);
 	return (0);
 }