mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-30 07:34:12 +08:00
6670e15244
Make default TCP default congestion control to a per namespace value. This changes default congestion control to a pointer to congestion ops (rather than implicit as first element of available lsit). The congestion control setting of new namespaces is inherited from the current setting of the root namespace. Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1241 lines
30 KiB
C
1241 lines
30 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* sysctl_net_ipv4.c: sysctl interface to net IPV4 subsystem.
|
|
*
|
|
* Begun April 1, 1996, Mike Shaver.
|
|
* Added /proc/sys/net/ipv4 directory entry (empty =) ). [MS]
|
|
*/
|
|
|
|
#include <linux/mm.h>
|
|
#include <linux/module.h>
|
|
#include <linux/sysctl.h>
|
|
#include <linux/igmp.h>
|
|
#include <linux/inetdevice.h>
|
|
#include <linux/seqlock.h>
|
|
#include <linux/init.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/nsproxy.h>
|
|
#include <linux/swap.h>
|
|
#include <net/snmp.h>
|
|
#include <net/icmp.h>
|
|
#include <net/ip.h>
|
|
#include <net/route.h>
|
|
#include <net/tcp.h>
|
|
#include <net/udp.h>
|
|
#include <net/cipso_ipv4.h>
|
|
#include <net/inet_frag.h>
|
|
#include <net/ping.h>
|
|
#include <net/protocol.h>
|
|
#include <net/netevent.h>
|
|
|
|
static int zero;
|
|
static int one = 1;
|
|
static int four = 4;
|
|
static int thousand = 1000;
|
|
static int gso_max_segs = GSO_MAX_SEGS;
|
|
static int tcp_retr1_max = 255;
|
|
static int ip_local_port_range_min[] = { 1, 1 };
|
|
static int ip_local_port_range_max[] = { 65535, 65535 };
|
|
static int tcp_adv_win_scale_min = -31;
|
|
static int tcp_adv_win_scale_max = 31;
|
|
static int ip_privileged_port_min;
|
|
static int ip_privileged_port_max = 65535;
|
|
static int ip_ttl_min = 1;
|
|
static int ip_ttl_max = 255;
|
|
static int tcp_syn_retries_min = 1;
|
|
static int tcp_syn_retries_max = MAX_TCP_SYNCNT;
|
|
static int ip_ping_group_range_min[] = { 0, 0 };
|
|
static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX };
|
|
|
|
/* obsolete */
|
|
static int sysctl_tcp_low_latency __read_mostly;
|
|
|
|
/* Update system visible IP port range */
|
|
static void set_local_port_range(struct net *net, int range[2])
|
|
{
|
|
bool same_parity = !((range[0] ^ range[1]) & 1);
|
|
|
|
write_seqlock_bh(&net->ipv4.ip_local_ports.lock);
|
|
if (same_parity && !net->ipv4.ip_local_ports.warned) {
|
|
net->ipv4.ip_local_ports.warned = true;
|
|
pr_err_ratelimited("ip_local_port_range: prefer different parity for start/end values.\n");
|
|
}
|
|
net->ipv4.ip_local_ports.range[0] = range[0];
|
|
net->ipv4.ip_local_ports.range[1] = range[1];
|
|
write_sequnlock_bh(&net->ipv4.ip_local_ports.lock);
|
|
}
|
|
|
|
/* Validate changes from /proc interface. */
|
|
static int ipv4_local_port_range(struct ctl_table *table, int write,
|
|
void __user *buffer,
|
|
size_t *lenp, loff_t *ppos)
|
|
{
|
|
struct net *net =
|
|
container_of(table->data, struct net, ipv4.ip_local_ports.range);
|
|
int ret;
|
|
int range[2];
|
|
struct ctl_table tmp = {
|
|
.data = &range,
|
|
.maxlen = sizeof(range),
|
|
.mode = table->mode,
|
|
.extra1 = &ip_local_port_range_min,
|
|
.extra2 = &ip_local_port_range_max,
|
|
};
|
|
|
|
inet_get_local_port_range(net, &range[0], &range[1]);
|
|
|
|
ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
|
|
|
|
if (write && ret == 0) {
|
|
/* Ensure that the upper limit is not smaller than the lower,
|
|
* and that the lower does not encroach upon the privileged
|
|
* port limit.
|
|
*/
|
|
if ((range[1] < range[0]) ||
|
|
(range[0] < net->ipv4.sysctl_ip_prot_sock))
|
|
ret = -EINVAL;
|
|
else
|
|
set_local_port_range(net, range);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Validate changes from /proc interface. */
|
|
static int ipv4_privileged_ports(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
struct net *net = container_of(table->data, struct net,
|
|
ipv4.sysctl_ip_prot_sock);
|
|
int ret;
|
|
int pports;
|
|
int range[2];
|
|
struct ctl_table tmp = {
|
|
.data = &pports,
|
|
.maxlen = sizeof(pports),
|
|
.mode = table->mode,
|
|
.extra1 = &ip_privileged_port_min,
|
|
.extra2 = &ip_privileged_port_max,
|
|
};
|
|
|
|
pports = net->ipv4.sysctl_ip_prot_sock;
|
|
|
|
ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
|
|
|
|
if (write && ret == 0) {
|
|
inet_get_local_port_range(net, &range[0], &range[1]);
|
|
/* Ensure that the local port range doesn't overlap with the
|
|
* privileged port range.
|
|
*/
|
|
if (range[0] < pports)
|
|
ret = -EINVAL;
|
|
else
|
|
net->ipv4.sysctl_ip_prot_sock = pports;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void inet_get_ping_group_range_table(struct ctl_table *table, kgid_t *low, kgid_t *high)
|
|
{
|
|
kgid_t *data = table->data;
|
|
struct net *net =
|
|
container_of(table->data, struct net, ipv4.ping_group_range.range);
|
|
unsigned int seq;
|
|
do {
|
|
seq = read_seqbegin(&net->ipv4.ping_group_range.lock);
|
|
|
|
*low = data[0];
|
|
*high = data[1];
|
|
} while (read_seqretry(&net->ipv4.ping_group_range.lock, seq));
|
|
}
|
|
|
|
/* Update system visible IP port range */
|
|
static void set_ping_group_range(struct ctl_table *table, kgid_t low, kgid_t high)
|
|
{
|
|
kgid_t *data = table->data;
|
|
struct net *net =
|
|
container_of(table->data, struct net, ipv4.ping_group_range.range);
|
|
write_seqlock(&net->ipv4.ping_group_range.lock);
|
|
data[0] = low;
|
|
data[1] = high;
|
|
write_sequnlock(&net->ipv4.ping_group_range.lock);
|
|
}
|
|
|
|
/* Validate changes from /proc interface. */
|
|
static int ipv4_ping_group_range(struct ctl_table *table, int write,
|
|
void __user *buffer,
|
|
size_t *lenp, loff_t *ppos)
|
|
{
|
|
struct user_namespace *user_ns = current_user_ns();
|
|
int ret;
|
|
gid_t urange[2];
|
|
kgid_t low, high;
|
|
struct ctl_table tmp = {
|
|
.data = &urange,
|
|
.maxlen = sizeof(urange),
|
|
.mode = table->mode,
|
|
.extra1 = &ip_ping_group_range_min,
|
|
.extra2 = &ip_ping_group_range_max,
|
|
};
|
|
|
|
inet_get_ping_group_range_table(table, &low, &high);
|
|
urange[0] = from_kgid_munged(user_ns, low);
|
|
urange[1] = from_kgid_munged(user_ns, high);
|
|
ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
|
|
|
|
if (write && ret == 0) {
|
|
low = make_kgid(user_ns, urange[0]);
|
|
high = make_kgid(user_ns, urange[1]);
|
|
if (!gid_valid(low) || !gid_valid(high) ||
|
|
(urange[1] < urange[0]) || gid_lt(high, low)) {
|
|
low = make_kgid(&init_user_ns, 1);
|
|
high = make_kgid(&init_user_ns, 0);
|
|
}
|
|
set_ping_group_range(table, low, high);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int proc_tcp_congestion_control(struct ctl_table *ctl, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
struct net *net = container_of(ctl->data, struct net,
|
|
ipv4.tcp_congestion_control);
|
|
char val[TCP_CA_NAME_MAX];
|
|
struct ctl_table tbl = {
|
|
.data = val,
|
|
.maxlen = TCP_CA_NAME_MAX,
|
|
};
|
|
int ret;
|
|
|
|
tcp_get_default_congestion_control(net, val);
|
|
|
|
ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
|
|
if (write && ret == 0)
|
|
ret = tcp_set_default_congestion_control(net, val);
|
|
return ret;
|
|
}
|
|
|
|
static int proc_tcp_available_congestion_control(struct ctl_table *ctl,
|
|
int write,
|
|
void __user *buffer, size_t *lenp,
|
|
loff_t *ppos)
|
|
{
|
|
struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, };
|
|
int ret;
|
|
|
|
tbl.data = kmalloc(tbl.maxlen, GFP_USER);
|
|
if (!tbl.data)
|
|
return -ENOMEM;
|
|
tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX);
|
|
ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
|
|
kfree(tbl.data);
|
|
return ret;
|
|
}
|
|
|
|
static int proc_allowed_congestion_control(struct ctl_table *ctl,
|
|
int write,
|
|
void __user *buffer, size_t *lenp,
|
|
loff_t *ppos)
|
|
{
|
|
struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX };
|
|
int ret;
|
|
|
|
tbl.data = kmalloc(tbl.maxlen, GFP_USER);
|
|
if (!tbl.data)
|
|
return -ENOMEM;
|
|
|
|
tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen);
|
|
ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
|
|
if (write && ret == 0)
|
|
ret = tcp_set_allowed_congestion_control(tbl.data);
|
|
kfree(tbl.data);
|
|
return ret;
|
|
}
|
|
|
|
static int proc_tcp_fastopen_key(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp,
|
|
loff_t *ppos)
|
|
{
|
|
struct net *net = container_of(table->data, struct net,
|
|
ipv4.sysctl_tcp_fastopen);
|
|
struct ctl_table tbl = { .maxlen = (TCP_FASTOPEN_KEY_LENGTH * 2 + 10) };
|
|
struct tcp_fastopen_context *ctxt;
|
|
int ret;
|
|
u32 user_key[4]; /* 16 bytes, matching TCP_FASTOPEN_KEY_LENGTH */
|
|
|
|
tbl.data = kmalloc(tbl.maxlen, GFP_KERNEL);
|
|
if (!tbl.data)
|
|
return -ENOMEM;
|
|
|
|
rcu_read_lock();
|
|
ctxt = rcu_dereference(net->ipv4.tcp_fastopen_ctx);
|
|
if (ctxt)
|
|
memcpy(user_key, ctxt->key, TCP_FASTOPEN_KEY_LENGTH);
|
|
else
|
|
memset(user_key, 0, sizeof(user_key));
|
|
rcu_read_unlock();
|
|
|
|
snprintf(tbl.data, tbl.maxlen, "%08x-%08x-%08x-%08x",
|
|
user_key[0], user_key[1], user_key[2], user_key[3]);
|
|
ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
|
|
|
|
if (write && ret == 0) {
|
|
if (sscanf(tbl.data, "%x-%x-%x-%x", user_key, user_key + 1,
|
|
user_key + 2, user_key + 3) != 4) {
|
|
ret = -EINVAL;
|
|
goto bad_key;
|
|
}
|
|
tcp_fastopen_reset_cipher(net, NULL, user_key,
|
|
TCP_FASTOPEN_KEY_LENGTH);
|
|
}
|
|
|
|
bad_key:
|
|
pr_debug("proc FO key set 0x%x-%x-%x-%x <- 0x%s: %u\n",
|
|
user_key[0], user_key[1], user_key[2], user_key[3],
|
|
(char *)tbl.data, ret);
|
|
kfree(tbl.data);
|
|
return ret;
|
|
}
|
|
|
|
static void proc_configure_early_demux(int enabled, int protocol)
|
|
{
|
|
struct net_protocol *ipprot;
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
struct inet6_protocol *ip6prot;
|
|
#endif
|
|
|
|
rcu_read_lock();
|
|
|
|
ipprot = rcu_dereference(inet_protos[protocol]);
|
|
if (ipprot)
|
|
ipprot->early_demux = enabled ? ipprot->early_demux_handler :
|
|
NULL;
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
ip6prot = rcu_dereference(inet6_protos[protocol]);
|
|
if (ip6prot)
|
|
ip6prot->early_demux = enabled ? ip6prot->early_demux_handler :
|
|
NULL;
|
|
#endif
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
static int proc_tcp_early_demux(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
int ret = 0;
|
|
|
|
ret = proc_dointvec(table, write, buffer, lenp, ppos);
|
|
|
|
if (write && !ret) {
|
|
int enabled = init_net.ipv4.sysctl_tcp_early_demux;
|
|
|
|
proc_configure_early_demux(enabled, IPPROTO_TCP);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int proc_udp_early_demux(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
int ret = 0;
|
|
|
|
ret = proc_dointvec(table, write, buffer, lenp, ppos);
|
|
|
|
if (write && !ret) {
|
|
int enabled = init_net.ipv4.sysctl_udp_early_demux;
|
|
|
|
proc_configure_early_demux(enabled, IPPROTO_UDP);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int proc_tfo_blackhole_detect_timeout(struct ctl_table *table,
|
|
int write,
|
|
void __user *buffer,
|
|
size_t *lenp, loff_t *ppos)
|
|
{
|
|
struct net *net = container_of(table->data, struct net,
|
|
ipv4.sysctl_tcp_fastopen_blackhole_timeout);
|
|
int ret;
|
|
|
|
ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
|
|
if (write && ret == 0)
|
|
atomic_set(&net->ipv4.tfo_active_disable_times, 0);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int proc_tcp_available_ulp(struct ctl_table *ctl,
|
|
int write,
|
|
void __user *buffer, size_t *lenp,
|
|
loff_t *ppos)
|
|
{
|
|
struct ctl_table tbl = { .maxlen = TCP_ULP_BUF_MAX, };
|
|
int ret;
|
|
|
|
tbl.data = kmalloc(tbl.maxlen, GFP_USER);
|
|
if (!tbl.data)
|
|
return -ENOMEM;
|
|
tcp_get_available_ulp(tbl.data, TCP_ULP_BUF_MAX);
|
|
ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
|
|
kfree(tbl.data);
|
|
|
|
return ret;
|
|
}
|
|
|
|
#ifdef CONFIG_IP_ROUTE_MULTIPATH
|
|
static int proc_fib_multipath_hash_policy(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp,
|
|
loff_t *ppos)
|
|
{
|
|
struct net *net = container_of(table->data, struct net,
|
|
ipv4.sysctl_fib_multipath_hash_policy);
|
|
int ret;
|
|
|
|
ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
|
|
if (write && ret == 0)
|
|
call_netevent_notifiers(NETEVENT_MULTIPATH_HASH_UPDATE, net);
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
static struct ctl_table ipv4_table[] = {
|
|
{
|
|
.procname = "tcp_max_orphans",
|
|
.data = &sysctl_tcp_max_orphans,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "inet_peer_threshold",
|
|
.data = &inet_peer_threshold,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "inet_peer_minttl",
|
|
.data = &inet_peer_minttl,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.procname = "inet_peer_maxttl",
|
|
.data = &inet_peer_maxttl,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.procname = "tcp_mem",
|
|
.maxlen = sizeof(sysctl_tcp_mem),
|
|
.data = &sysctl_tcp_mem,
|
|
.mode = 0644,
|
|
.proc_handler = proc_doulongvec_minmax,
|
|
},
|
|
{
|
|
.procname = "tcp_low_latency",
|
|
.data = &sysctl_tcp_low_latency,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
#ifdef CONFIG_NETLABEL
|
|
{
|
|
.procname = "cipso_cache_enable",
|
|
.data = &cipso_v4_cache_enabled,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "cipso_cache_bucket_size",
|
|
.data = &cipso_v4_cache_bucketsize,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "cipso_rbm_optfmt",
|
|
.data = &cipso_v4_rbm_optfmt,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "cipso_rbm_strictvalid",
|
|
.data = &cipso_v4_rbm_strictvalid,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif /* CONFIG_NETLABEL */
|
|
{
|
|
.procname = "tcp_available_congestion_control",
|
|
.maxlen = TCP_CA_BUF_MAX,
|
|
.mode = 0444,
|
|
.proc_handler = proc_tcp_available_congestion_control,
|
|
},
|
|
{
|
|
.procname = "tcp_allowed_congestion_control",
|
|
.maxlen = TCP_CA_BUF_MAX,
|
|
.mode = 0644,
|
|
.proc_handler = proc_allowed_congestion_control,
|
|
},
|
|
{
|
|
.procname = "tcp_available_ulp",
|
|
.maxlen = TCP_ULP_BUF_MAX,
|
|
.mode = 0444,
|
|
.proc_handler = proc_tcp_available_ulp,
|
|
},
|
|
{
|
|
.procname = "icmp_msgs_per_sec",
|
|
.data = &sysctl_icmp_msgs_per_sec,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
},
|
|
{
|
|
.procname = "icmp_msgs_burst",
|
|
.data = &sysctl_icmp_msgs_burst,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
},
|
|
{
|
|
.procname = "udp_mem",
|
|
.data = &sysctl_udp_mem,
|
|
.maxlen = sizeof(sysctl_udp_mem),
|
|
.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
|
|
},
|
|
{ }
|
|
};
|
|
|
|
static struct ctl_table ipv4_net_table[] = {
|
|
{
|
|
.procname = "icmp_echo_ignore_all",
|
|
.data = &init_net.ipv4.sysctl_icmp_echo_ignore_all,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "icmp_echo_ignore_broadcasts",
|
|
.data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "icmp_ignore_bogus_error_responses",
|
|
.data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "icmp_errors_use_inbound_ifaddr",
|
|
.data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "icmp_ratelimit",
|
|
.data = &init_net.ipv4.sysctl_icmp_ratelimit,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_ms_jiffies,
|
|
},
|
|
{
|
|
.procname = "icmp_ratemask",
|
|
.data = &init_net.ipv4.sysctl_icmp_ratemask,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "ping_group_range",
|
|
.data = &init_net.ipv4.ping_group_range.range,
|
|
.maxlen = sizeof(gid_t)*2,
|
|
.mode = 0644,
|
|
.proc_handler = ipv4_ping_group_range,
|
|
},
|
|
{
|
|
.procname = "tcp_ecn",
|
|
.data = &init_net.ipv4.sysctl_tcp_ecn,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_ecn_fallback",
|
|
.data = &init_net.ipv4.sysctl_tcp_ecn_fallback,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "ip_dynaddr",
|
|
.data = &init_net.ipv4.sysctl_ip_dynaddr,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "ip_early_demux",
|
|
.data = &init_net.ipv4.sysctl_ip_early_demux,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "udp_early_demux",
|
|
.data = &init_net.ipv4.sysctl_udp_early_demux,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_udp_early_demux
|
|
},
|
|
{
|
|
.procname = "tcp_early_demux",
|
|
.data = &init_net.ipv4.sysctl_tcp_early_demux,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_tcp_early_demux
|
|
},
|
|
{
|
|
.procname = "ip_default_ttl",
|
|
.data = &init_net.ipv4.sysctl_ip_default_ttl,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &ip_ttl_min,
|
|
.extra2 = &ip_ttl_max,
|
|
},
|
|
{
|
|
.procname = "ip_local_port_range",
|
|
.maxlen = sizeof(init_net.ipv4.ip_local_ports.range),
|
|
.data = &init_net.ipv4.ip_local_ports.range,
|
|
.mode = 0644,
|
|
.proc_handler = ipv4_local_port_range,
|
|
},
|
|
{
|
|
.procname = "ip_local_reserved_ports",
|
|
.data = &init_net.ipv4.sysctl_local_reserved_ports,
|
|
.maxlen = 65536,
|
|
.mode = 0644,
|
|
.proc_handler = proc_do_large_bitmap,
|
|
},
|
|
{
|
|
.procname = "ip_no_pmtu_disc",
|
|
.data = &init_net.ipv4.sysctl_ip_no_pmtu_disc,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "ip_forward_use_pmtu",
|
|
.data = &init_net.ipv4.sysctl_ip_fwd_use_pmtu,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "ip_nonlocal_bind",
|
|
.data = &init_net.ipv4.sysctl_ip_nonlocal_bind,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "fwmark_reflect",
|
|
.data = &init_net.ipv4.sysctl_fwmark_reflect,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "tcp_fwmark_accept",
|
|
.data = &init_net.ipv4.sysctl_tcp_fwmark_accept,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#ifdef CONFIG_NET_L3_MASTER_DEV
|
|
{
|
|
.procname = "tcp_l3mdev_accept",
|
|
.data = &init_net.ipv4.sysctl_tcp_l3mdev_accept,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
.extra2 = &one,
|
|
},
|
|
#endif
|
|
{
|
|
.procname = "tcp_mtu_probing",
|
|
.data = &init_net.ipv4.sysctl_tcp_mtu_probing,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "tcp_base_mss",
|
|
.data = &init_net.ipv4.sysctl_tcp_base_mss,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "tcp_probe_threshold",
|
|
.data = &init_net.ipv4.sysctl_tcp_probe_threshold,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "tcp_probe_interval",
|
|
.data = &init_net.ipv4.sysctl_tcp_probe_interval,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "igmp_link_local_mcast_reports",
|
|
.data = &init_net.ipv4.sysctl_igmp_llm_reports,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "igmp_max_memberships",
|
|
.data = &init_net.ipv4.sysctl_igmp_max_memberships,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "igmp_max_msf",
|
|
.data = &init_net.ipv4.sysctl_igmp_max_msf,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
#ifdef CONFIG_IP_MULTICAST
|
|
{
|
|
.procname = "igmp_qrv",
|
|
.data = &init_net.ipv4.sysctl_igmp_qrv,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &one
|
|
},
|
|
#endif
|
|
{
|
|
.procname = "tcp_congestion_control",
|
|
.data = &init_net.ipv4.tcp_congestion_control,
|
|
.mode = 0644,
|
|
.maxlen = TCP_CA_NAME_MAX,
|
|
.proc_handler = proc_tcp_congestion_control,
|
|
},
|
|
{
|
|
.procname = "tcp_keepalive_time",
|
|
.data = &init_net.ipv4.sysctl_tcp_keepalive_time,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.procname = "tcp_keepalive_probes",
|
|
.data = &init_net.ipv4.sysctl_tcp_keepalive_probes,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_keepalive_intvl",
|
|
.data = &init_net.ipv4.sysctl_tcp_keepalive_intvl,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.procname = "tcp_syn_retries",
|
|
.data = &init_net.ipv4.sysctl_tcp_syn_retries,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &tcp_syn_retries_min,
|
|
.extra2 = &tcp_syn_retries_max
|
|
},
|
|
{
|
|
.procname = "tcp_synack_retries",
|
|
.data = &init_net.ipv4.sysctl_tcp_synack_retries,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
#ifdef CONFIG_SYN_COOKIES
|
|
{
|
|
.procname = "tcp_syncookies",
|
|
.data = &init_net.ipv4.sysctl_tcp_syncookies,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
#endif
|
|
{
|
|
.procname = "tcp_reordering",
|
|
.data = &init_net.ipv4.sysctl_tcp_reordering,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_retries1",
|
|
.data = &init_net.ipv4.sysctl_tcp_retries1,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra2 = &tcp_retr1_max
|
|
},
|
|
{
|
|
.procname = "tcp_retries2",
|
|
.data = &init_net.ipv4.sysctl_tcp_retries2,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_orphan_retries",
|
|
.data = &init_net.ipv4.sysctl_tcp_orphan_retries,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_fin_timeout",
|
|
.data = &init_net.ipv4.sysctl_tcp_fin_timeout,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.procname = "tcp_notsent_lowat",
|
|
.data = &init_net.ipv4.sysctl_tcp_notsent_lowat,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_douintvec,
|
|
},
|
|
{
|
|
.procname = "tcp_tw_reuse",
|
|
.data = &init_net.ipv4.sysctl_tcp_tw_reuse,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_max_tw_buckets",
|
|
.data = &init_net.ipv4.tcp_death_row.sysctl_max_tw_buckets,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_max_syn_backlog",
|
|
.data = &init_net.ipv4.sysctl_max_syn_backlog,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_fastopen",
|
|
.data = &init_net.ipv4.sysctl_tcp_fastopen,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "tcp_fastopen_key",
|
|
.mode = 0600,
|
|
.data = &init_net.ipv4.sysctl_tcp_fastopen,
|
|
.maxlen = ((TCP_FASTOPEN_KEY_LENGTH * 2) + 10),
|
|
.proc_handler = proc_tcp_fastopen_key,
|
|
},
|
|
{
|
|
.procname = "tcp_fastopen_blackhole_timeout_sec",
|
|
.data = &init_net.ipv4.sysctl_tcp_fastopen_blackhole_timeout,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_tfo_blackhole_detect_timeout,
|
|
.extra1 = &zero,
|
|
},
|
|
#ifdef CONFIG_IP_ROUTE_MULTIPATH
|
|
{
|
|
.procname = "fib_multipath_use_neigh",
|
|
.data = &init_net.ipv4.sysctl_fib_multipath_use_neigh,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
.extra2 = &one,
|
|
},
|
|
{
|
|
.procname = "fib_multipath_hash_policy",
|
|
.data = &init_net.ipv4.sysctl_fib_multipath_hash_policy,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_fib_multipath_hash_policy,
|
|
.extra1 = &zero,
|
|
.extra2 = &one,
|
|
},
|
|
#endif
|
|
{
|
|
.procname = "ip_unprivileged_port_start",
|
|
.maxlen = sizeof(int),
|
|
.data = &init_net.ipv4.sysctl_ip_prot_sock,
|
|
.mode = 0644,
|
|
.proc_handler = ipv4_privileged_ports,
|
|
},
|
|
#ifdef CONFIG_NET_L3_MASTER_DEV
|
|
{
|
|
.procname = "udp_l3mdev_accept",
|
|
.data = &init_net.ipv4.sysctl_udp_l3mdev_accept,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
.extra2 = &one,
|
|
},
|
|
#endif
|
|
{
|
|
.procname = "tcp_sack",
|
|
.data = &init_net.ipv4.sysctl_tcp_sack,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_window_scaling",
|
|
.data = &init_net.ipv4.sysctl_tcp_window_scaling,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_timestamps",
|
|
.data = &init_net.ipv4.sysctl_tcp_timestamps,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_early_retrans",
|
|
.data = &init_net.ipv4.sysctl_tcp_early_retrans,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
.extra2 = &four,
|
|
},
|
|
{
|
|
.procname = "tcp_recovery",
|
|
.data = &init_net.ipv4.sysctl_tcp_recovery,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "tcp_thin_linear_timeouts",
|
|
.data = &init_net.ipv4.sysctl_tcp_thin_linear_timeouts,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_slow_start_after_idle",
|
|
.data = &init_net.ipv4.sysctl_tcp_slow_start_after_idle,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_retrans_collapse",
|
|
.data = &init_net.ipv4.sysctl_tcp_retrans_collapse,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_stdurg",
|
|
.data = &init_net.ipv4.sysctl_tcp_stdurg,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_rfc1337",
|
|
.data = &init_net.ipv4.sysctl_tcp_rfc1337,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_abort_on_overflow",
|
|
.data = &init_net.ipv4.sysctl_tcp_abort_on_overflow,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_fack",
|
|
.data = &init_net.ipv4.sysctl_tcp_fack,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_max_reordering",
|
|
.data = &init_net.ipv4.sysctl_tcp_max_reordering,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_dsack",
|
|
.data = &init_net.ipv4.sysctl_tcp_dsack,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_app_win",
|
|
.data = &init_net.ipv4.sysctl_tcp_app_win,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_adv_win_scale",
|
|
.data = &init_net.ipv4.sysctl_tcp_adv_win_scale,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &tcp_adv_win_scale_min,
|
|
.extra2 = &tcp_adv_win_scale_max,
|
|
},
|
|
{
|
|
.procname = "tcp_frto",
|
|
.data = &init_net.ipv4.sysctl_tcp_frto,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_no_metrics_save",
|
|
.data = &init_net.ipv4.sysctl_tcp_nometrics_save,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "tcp_moderate_rcvbuf",
|
|
.data = &init_net.ipv4.sysctl_tcp_moderate_rcvbuf,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "tcp_tso_win_divisor",
|
|
.data = &init_net.ipv4.sysctl_tcp_tso_win_divisor,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "tcp_workaround_signed_windows",
|
|
.data = &init_net.ipv4.sysctl_tcp_workaround_signed_windows,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_limit_output_bytes",
|
|
.data = &init_net.ipv4.sysctl_tcp_limit_output_bytes,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_challenge_ack_limit",
|
|
.data = &init_net.ipv4.sysctl_tcp_challenge_ack_limit,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_min_tso_segs",
|
|
.data = &init_net.ipv4.sysctl_tcp_min_tso_segs,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &one,
|
|
.extra2 = &gso_max_segs,
|
|
},
|
|
{
|
|
.procname = "tcp_min_rtt_wlen",
|
|
.data = &init_net.ipv4.sysctl_tcp_min_rtt_wlen,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_autocorking",
|
|
.data = &init_net.ipv4.sysctl_tcp_autocorking,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
.extra2 = &one,
|
|
},
|
|
{
|
|
.procname = "tcp_invalid_ratelimit",
|
|
.data = &init_net.ipv4.sysctl_tcp_invalid_ratelimit,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_ms_jiffies,
|
|
},
|
|
{
|
|
.procname = "tcp_pacing_ss_ratio",
|
|
.data = &init_net.ipv4.sysctl_tcp_pacing_ss_ratio,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
.extra2 = &thousand,
|
|
},
|
|
{
|
|
.procname = "tcp_pacing_ca_ratio",
|
|
.data = &init_net.ipv4.sysctl_tcp_pacing_ca_ratio,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
.extra2 = &thousand,
|
|
},
|
|
{
|
|
.procname = "tcp_wmem",
|
|
.data = &init_net.ipv4.sysctl_tcp_wmem,
|
|
.maxlen = sizeof(init_net.ipv4.sysctl_tcp_wmem),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &one,
|
|
},
|
|
{
|
|
.procname = "tcp_rmem",
|
|
.data = &init_net.ipv4.sysctl_tcp_rmem,
|
|
.maxlen = sizeof(init_net.ipv4.sysctl_tcp_rmem),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &one,
|
|
},
|
|
{ }
|
|
};
|
|
|
|
static __net_init int ipv4_sysctl_init_net(struct net *net)
|
|
{
|
|
struct ctl_table *table;
|
|
|
|
table = ipv4_net_table;
|
|
if (!net_eq(net, &init_net)) {
|
|
int i;
|
|
|
|
table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL);
|
|
if (!table)
|
|
goto err_alloc;
|
|
|
|
/* Update the variables to point into the current struct net */
|
|
for (i = 0; i < ARRAY_SIZE(ipv4_net_table) - 1; i++)
|
|
table[i].data += (void *)net - (void *)&init_net;
|
|
}
|
|
|
|
net->ipv4.ipv4_hdr = register_net_sysctl(net, "net/ipv4", table);
|
|
if (!net->ipv4.ipv4_hdr)
|
|
goto err_reg;
|
|
|
|
net->ipv4.sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL);
|
|
if (!net->ipv4.sysctl_local_reserved_ports)
|
|
goto err_ports;
|
|
|
|
return 0;
|
|
|
|
err_ports:
|
|
unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
|
|
err_reg:
|
|
if (!net_eq(net, &init_net))
|
|
kfree(table);
|
|
err_alloc:
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static __net_exit void ipv4_sysctl_exit_net(struct net *net)
|
|
{
|
|
struct ctl_table *table;
|
|
|
|
kfree(net->ipv4.sysctl_local_reserved_ports);
|
|
table = net->ipv4.ipv4_hdr->ctl_table_arg;
|
|
unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
|
|
kfree(table);
|
|
}
|
|
|
|
static __net_initdata struct pernet_operations ipv4_sysctl_ops = {
|
|
.init = ipv4_sysctl_init_net,
|
|
.exit = ipv4_sysctl_exit_net,
|
|
};
|
|
|
|
static __init int sysctl_ipv4_init(void)
|
|
{
|
|
struct ctl_table_header *hdr;
|
|
|
|
hdr = register_net_sysctl(&init_net, "net/ipv4", ipv4_table);
|
|
if (!hdr)
|
|
return -ENOMEM;
|
|
|
|
if (register_pernet_subsys(&ipv4_sysctl_ops)) {
|
|
unregister_net_sysctl_table(hdr);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
__initcall(sysctl_ipv4_init);
|