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ipv4: shrink netns_ipv4 with sysctl conversions

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[ Upstream commit 4b6bbf17d4e1939afa72821879fc033d725e9491 ]

These sysctls that can fit in one byte instead of one int
are converted to save space and thus reduce cache line misses.

 - icmp_echo_ignore_all, icmp_echo_ignore_broadcasts,
 - icmp_ignore_bogus_error_responses, icmp_errors_use_inbound_ifaddr
 - tcp_ecn, tcp_ecn_fallback
 - ip_default_ttl, ip_no_pmtu_disc, ip_fwd_use_pmtu
 - ip_nonlocal_bind, ip_autobind_reuse
 - ip_dynaddr, ip_early_demux, raw_l3mdev_accept
 - nexthop_compat_mode, fwmark_reflect

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stable-dep-of: dc5110c2d959 ("tcp: restrict net.ipv4.tcp_app_win")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Eric Dumazet 2021-03-25 11:08:14 -07:00 committed by Greg Kroah-Hartman
parent 389dab6142
commit f662a0786d
2 changed files with 48 additions and 48 deletions
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32
include/net/netns/ipv4.h
View File

@ -84,36 +84,36 @@ struct netns_ipv4 {
struct xt_table *nat_table;
#endif
int sysctl_icmp_echo_ignore_all;
int sysctl_icmp_echo_ignore_broadcasts;
int sysctl_icmp_ignore_bogus_error_responses;
u8 sysctl_icmp_echo_ignore_all;
u8 sysctl_icmp_echo_ignore_broadcasts;
u8 sysctl_icmp_ignore_bogus_error_responses;
u8 sysctl_icmp_errors_use_inbound_ifaddr;
int sysctl_icmp_ratelimit;
int sysctl_icmp_ratemask;
int sysctl_icmp_errors_use_inbound_ifaddr;
struct local_ports ip_local_ports;
int sysctl_tcp_ecn;
int sysctl_tcp_ecn_fallback;
u8 sysctl_tcp_ecn;
u8 sysctl_tcp_ecn_fallback;
int sysctl_ip_default_ttl;
int sysctl_ip_no_pmtu_disc;
int sysctl_ip_fwd_use_pmtu;
u8 sysctl_ip_default_ttl;
u8 sysctl_ip_no_pmtu_disc;
u8 sysctl_ip_fwd_use_pmtu;
int sysctl_ip_fwd_update_priority;
int sysctl_ip_nonlocal_bind;
int sysctl_ip_autobind_reuse;
u8 sysctl_ip_nonlocal_bind;
u8 sysctl_ip_autobind_reuse;
/* Shall we try to damage output packets if routing dev changes? */
int sysctl_ip_dynaddr;
int sysctl_ip_early_demux;
u8 sysctl_ip_dynaddr;
u8 sysctl_ip_early_demux;
#ifdef CONFIG_NET_L3_MASTER_DEV
int sysctl_raw_l3mdev_accept;
u8 sysctl_raw_l3mdev_accept;
#endif
int sysctl_tcp_early_demux;
int sysctl_udp_early_demux;
int sysctl_nexthop_compat_mode;
u8 sysctl_nexthop_compat_mode;
int sysctl_fwmark_reflect;
u8 sysctl_fwmark_reflect;
int sysctl_tcp_fwmark_accept;
#ifdef CONFIG_NET_L3_MASTER_DEV
int sysctl_tcp_l3mdev_accept;

64
net/ipv4/sysctl_net_ipv4.c
View File

@ -540,30 +540,30 @@ static struct ctl_table ipv4_net_table[] = {
{
.procname = "icmp_echo_ignore_all",
.data = &init_net.ipv4.sysctl_icmp_echo_ignore_all,
.maxlen = sizeof(int),
.maxlen = sizeof(u8),
.mode = 0644,
.proc_handler = proc_dointvec
.proc_handler = proc_dou8vec_minmax,
},
{
.procname = "icmp_echo_ignore_broadcasts",
.data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts,
.maxlen = sizeof(int),
.maxlen = sizeof(u8),
.mode = 0644,
.proc_handler = proc_dointvec
.proc_handler = proc_dou8vec_minmax,
},
{
.procname = "icmp_ignore_bogus_error_responses",
.data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses,
.maxlen = sizeof(int),
.maxlen = sizeof(u8),
.mode = 0644,
.proc_handler = proc_dointvec
.proc_handler = proc_dou8vec_minmax,
},
{
.procname = "icmp_errors_use_inbound_ifaddr",
.data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr,
.maxlen = sizeof(int),
.maxlen = sizeof(u8),
.mode = 0644,
.proc_handler = proc_dointvec
.proc_handler = proc_dou8vec_minmax,
},
{
.procname = "icmp_ratelimit",
@ -590,9 +590,9 @@ static struct ctl_table ipv4_net_table[] = {
{
.procname = "raw_l3mdev_accept",
.data = &init_net.ipv4.sysctl_raw_l3mdev_accept,
.maxlen = sizeof(int),
.maxlen = sizeof(u8),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.proc_handler = proc_dou8vec_minmax,
.extra1 = SYSCTL_ZERO,
.extra2 = SYSCTL_ONE,
},
@ -600,30 +600,30 @@ static struct ctl_table ipv4_net_table[] = {
{
.procname = "tcp_ecn",
.data = &init_net.ipv4.sysctl_tcp_ecn,
.maxlen = sizeof(int),
.maxlen = sizeof(u8),
.mode = 0644,
.proc_handler = proc_dointvec
.proc_handler = proc_dou8vec_minmax,
},
{
.procname = "tcp_ecn_fallback",
.data = &init_net.ipv4.sysctl_tcp_ecn_fallback,
.maxlen = sizeof(int),
.maxlen = sizeof(u8),
.mode = 0644,
.proc_handler = proc_dointvec
.proc_handler = proc_dou8vec_minmax,
},
{
.procname = "ip_dynaddr",
.data = &init_net.ipv4.sysctl_ip_dynaddr,
.maxlen = sizeof(int),
.maxlen = sizeof(u8),
.mode = 0644,
.proc_handler = proc_dointvec
.proc_handler = proc_dou8vec_minmax,
},
{
.procname = "ip_early_demux",
.data = &init_net.ipv4.sysctl_ip_early_demux,
.maxlen = sizeof(int),
.maxlen = sizeof(u8),
.mode = 0644,
.proc_handler = proc_dointvec
.proc_handler = proc_dou8vec_minmax,
},
{
.procname = "udp_early_demux",
@ -642,18 +642,18 @@ static struct ctl_table ipv4_net_table[] = {
{
.procname = "nexthop_compat_mode",
.data = &init_net.ipv4.sysctl_nexthop_compat_mode,
.maxlen = sizeof(int),
.maxlen = sizeof(u8),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.proc_handler = proc_dou8vec_minmax,
.extra1 = SYSCTL_ZERO,
.extra2 = SYSCTL_ONE,
},
{
.procname = "ip_default_ttl",
.data = &init_net.ipv4.sysctl_ip_default_ttl,
.maxlen = sizeof(int),
.maxlen = sizeof(u8),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.proc_handler = proc_dou8vec_minmax,
.extra1 = &ip_ttl_min,
.extra2 = &ip_ttl_max,
},
@ -674,16 +674,16 @@ static struct ctl_table ipv4_net_table[] = {
{
.procname = "ip_no_pmtu_disc",
.data = &init_net.ipv4.sysctl_ip_no_pmtu_disc,
.maxlen = sizeof(int),
.maxlen = sizeof(u8),
.mode = 0644,
.proc_handler = proc_dointvec
.proc_handler = proc_dou8vec_minmax,
},
{
.procname = "ip_forward_use_pmtu",
.data = &init_net.ipv4.sysctl_ip_fwd_use_pmtu,
.maxlen = sizeof(int),
.maxlen = sizeof(u8),
.mode = 0644,
.proc_handler = proc_dointvec,
.proc_handler = proc_dou8vec_minmax,
},
{
.procname = "ip_forward_update_priority",
@ -697,25 +697,25 @@ static struct ctl_table ipv4_net_table[] = {
{
.procname = "ip_nonlocal_bind",
.data = &init_net.ipv4.sysctl_ip_nonlocal_bind,
.maxlen = sizeof(int),
.maxlen = sizeof(u8),
.mode = 0644,
.proc_handler = proc_dointvec
.proc_handler = proc_dou8vec_minmax,
},
{
.procname = "ip_autobind_reuse",
.data = &init_net.ipv4.sysctl_ip_autobind_reuse,
.maxlen = sizeof(int),
.maxlen = sizeof(u8),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.proc_handler = proc_dou8vec_minmax,
.extra1 = SYSCTL_ZERO,
.extra2 = SYSCTL_ONE,
},
{
.procname = "fwmark_reflect",
.data = &init_net.ipv4.sysctl_fwmark_reflect,
.maxlen = sizeof(int),
.maxlen = sizeof(u8),
.mode = 0644,
.proc_handler = proc_dointvec,
.proc_handler = proc_dou8vec_minmax,
},
{
.procname = "tcp_fwmark_accept",