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udp: Move the udp sysctl to namespace.

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This patch moves the udp_rmem_min, udp_wmem_min
to namespace and init the udp_l3mdev_accept explicitly.

The udp_rmem_min/udp_wmem_min affect udp rx/tx queue,
with this patch namespaces can set them differently.

Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tonghao Zhang 2018-03-13 21:57:16 -07:00 committed by David S. Miller
parent 859844e5c2
commit 1e80295158
4 changed files with 96 additions and 77 deletions
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3
include/net/netns/ipv4.h
View file

@ -168,6 +168,9 @@ struct netns_ipv4 {
atomic_t tfo_active_disable_times;
unsigned long tfo_active_disable_stamp;
int sysctl_udp_wmem_min;
int sysctl_udp_rmem_min;
#ifdef CONFIG_NET_L3_MASTER_DEV
int sysctl_udp_l3mdev_accept;
#endif

32
net/ipv4/sysctl_net_ipv4.c
View file

@ -520,22 +520,6 @@ static struct ctl_table ipv4_table[] = {
.mode = 0644,
.proc_handler = proc_doulongvec_minmax,
},
{
.procname = "udp_rmem_min",
.data = &sysctl_udp_rmem_min,
.maxlen = sizeof(sysctl_udp_rmem_min),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &one
},
{
.procname = "udp_wmem_min",
.data = &sysctl_udp_wmem_min,
.maxlen = sizeof(sysctl_udp_wmem_min),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &one
},
{ }
};
@ -1167,6 +1151,22 @@ static struct ctl_table ipv4_net_table[] = {
.proc_handler = proc_dointvec_minmax,
.extra1 = &one,
},
{
.procname = "udp_rmem_min",
.data = &init_net.ipv4.sysctl_udp_rmem_min,
.maxlen = sizeof(init_net.ipv4.sysctl_udp_rmem_min),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &one
},
{
.procname = "udp_wmem_min",
.data = &init_net.ipv4.sysctl_udp_wmem_min,
.maxlen = sizeof(init_net.ipv4.sysctl_udp_wmem_min),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &one
},
{ }
};

36
net/ipv4/udp.c
View file

@ -122,12 +122,6 @@ EXPORT_SYMBOL(udp_table);
long sysctl_udp_mem[3] __read_mostly;
EXPORT_SYMBOL(sysctl_udp_mem);
int sysctl_udp_rmem_min __read_mostly;
EXPORT_SYMBOL(sysctl_udp_rmem_min);
int sysctl_udp_wmem_min __read_mostly;
EXPORT_SYMBOL(sysctl_udp_wmem_min);
atomic_long_t udp_memory_allocated;
EXPORT_SYMBOL(udp_memory_allocated);
@ -2553,8 +2547,8 @@ struct proto udp_prot = {
.get_port = udp_v4_get_port,
.memory_allocated = &udp_memory_allocated,
.sysctl_mem = sysctl_udp_mem,
.sysctl_wmem = &sysctl_udp_wmem_min,
.sysctl_rmem = &sysctl_udp_rmem_min,
.sysctl_wmem_offset = offsetof(struct net, ipv4.sysctl_udp_wmem_min),
.sysctl_rmem_offset = offsetof(struct net, ipv4.sysctl_udp_rmem_min),
.obj_size = sizeof(struct udp_sock),
.h.udp_table = &udp_table,
#ifdef CONFIG_COMPAT
@ -2831,6 +2825,26 @@ u32 udp_flow_hashrnd(void)
}
EXPORT_SYMBOL(udp_flow_hashrnd);
static void __udp_sysctl_init(struct net *net)
{
net->ipv4.sysctl_udp_rmem_min = SK_MEM_QUANTUM;
net->ipv4.sysctl_udp_wmem_min = SK_MEM_QUANTUM;
#ifdef CONFIG_NET_L3_MASTER_DEV
net->ipv4.sysctl_udp_l3mdev_accept = 0;
#endif
}
static int __net_init udp_sysctl_init(struct net *net)
{
__udp_sysctl_init(net);
return 0;
}
static struct pernet_operations __net_initdata udp_sysctl_ops = {
.init = udp_sysctl_init,
};
void __init udp_init(void)
{
unsigned long limit;
@ -2843,8 +2857,7 @@ void __init udp_init(void)
sysctl_udp_mem[1] = limit;
sysctl_udp_mem[2] = sysctl_udp_mem[0] * 2;
sysctl_udp_rmem_min = SK_MEM_QUANTUM;
sysctl_udp_wmem_min = SK_MEM_QUANTUM;
__udp_sysctl_init(&init_net);
/* 16 spinlocks per cpu */
udp_busylocks_log = ilog2(nr_cpu_ids) + 4;
@ -2854,4 +2867,7 @@ void __init udp_init(void)
panic("UDP: failed to alloc udp_busylocks\n");
for (i = 0; i < (1U << udp_busylocks_log); i++)
spin_lock_init(udp_busylocks + i);
if (register_pernet_subsys(&udp_sysctl_ops))
panic("UDP: failed to init sysctl parameters.\n");
}

4
net/ipv6/udp.c
View file

@ -1528,8 +1528,8 @@ struct proto udpv6_prot = {
.get_port = udp_v6_get_port,
.memory_allocated = &udp_memory_allocated,
.sysctl_mem = sysctl_udp_mem,
.sysctl_wmem = &sysctl_udp_wmem_min,
.sysctl_rmem = &sysctl_udp_rmem_min,
.sysctl_wmem_offset = offsetof(struct net, ipv4.sysctl_udp_wmem_min),
.sysctl_rmem_offset = offsetof(struct net, ipv4.sysctl_udp_rmem_min),
.obj_size = sizeof(struct udp6_sock),
.h.udp_table = &udp_table,
#ifdef CONFIG_COMPAT