464dc801c7
In preparation for supporting the creation of network namespaces by unprivileged users, modify all of the per net sysctl exports and refuse to allow them to unprivileged users. This makes it safe for unprivileged users in general to access per net sysctls, and allows sysctls to be exported to unprivileged users on an individual basis as they are deemed safe. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
954 lines
22 KiB
C
954 lines
22 KiB
C
/*
|
|
* 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/tcp_memcontrol.h>
|
|
|
|
static int zero;
|
|
static int two = 2;
|
|
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_ttl_min = 1;
|
|
static int ip_ttl_max = 255;
|
|
static int ip_ping_group_range_min[] = { 0, 0 };
|
|
static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX };
|
|
|
|
/* Update system visible IP port range */
|
|
static void set_local_port_range(int range[2])
|
|
{
|
|
write_seqlock(&sysctl_local_ports.lock);
|
|
sysctl_local_ports.range[0] = range[0];
|
|
sysctl_local_ports.range[1] = range[1];
|
|
write_sequnlock(&sysctl_local_ports.lock);
|
|
}
|
|
|
|
/* Validate changes from /proc interface. */
|
|
static int ipv4_local_port_range(ctl_table *table, int write,
|
|
void __user *buffer,
|
|
size_t *lenp, loff_t *ppos)
|
|
{
|
|
int ret;
|
|
int range[2];
|
|
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(range, range + 1);
|
|
ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
|
|
|
|
if (write && ret == 0) {
|
|
if (range[1] < range[0])
|
|
ret = -EINVAL;
|
|
else
|
|
set_local_port_range(range);
|
|
}
|
|
|
|
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;
|
|
unsigned int seq;
|
|
do {
|
|
seq = read_seqbegin(&sysctl_local_ports.lock);
|
|
|
|
*low = data[0];
|
|
*high = data[1];
|
|
} while (read_seqretry(&sysctl_local_ports.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;
|
|
write_seqlock(&sysctl_local_ports.lock);
|
|
data[0] = low;
|
|
data[1] = high;
|
|
write_sequnlock(&sysctl_local_ports.lock);
|
|
}
|
|
|
|
/* Validate changes from /proc interface. */
|
|
static int ipv4_ping_group_range(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;
|
|
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(ctl_table *ctl, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
char val[TCP_CA_NAME_MAX];
|
|
ctl_table tbl = {
|
|
.data = val,
|
|
.maxlen = TCP_CA_NAME_MAX,
|
|
};
|
|
int ret;
|
|
|
|
tcp_get_default_congestion_control(val);
|
|
|
|
ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
|
|
if (write && ret == 0)
|
|
ret = tcp_set_default_congestion_control(val);
|
|
return ret;
|
|
}
|
|
|
|
static int proc_tcp_available_congestion_control(ctl_table *ctl,
|
|
int write,
|
|
void __user *buffer, size_t *lenp,
|
|
loff_t *ppos)
|
|
{
|
|
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(ctl_table *ctl,
|
|
int write,
|
|
void __user *buffer, size_t *lenp,
|
|
loff_t *ppos)
|
|
{
|
|
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 ipv4_tcp_mem(ctl_table *ctl, int write,
|
|
void __user *buffer, size_t *lenp,
|
|
loff_t *ppos)
|
|
{
|
|
int ret;
|
|
unsigned long vec[3];
|
|
struct net *net = current->nsproxy->net_ns;
|
|
#ifdef CONFIG_MEMCG_KMEM
|
|
struct mem_cgroup *memcg;
|
|
#endif
|
|
|
|
ctl_table tmp = {
|
|
.data = &vec,
|
|
.maxlen = sizeof(vec),
|
|
.mode = ctl->mode,
|
|
};
|
|
|
|
if (!write) {
|
|
ctl->data = &net->ipv4.sysctl_tcp_mem;
|
|
return proc_doulongvec_minmax(ctl, write, buffer, lenp, ppos);
|
|
}
|
|
|
|
ret = proc_doulongvec_minmax(&tmp, write, buffer, lenp, ppos);
|
|
if (ret)
|
|
return ret;
|
|
|
|
#ifdef CONFIG_MEMCG_KMEM
|
|
rcu_read_lock();
|
|
memcg = mem_cgroup_from_task(current);
|
|
|
|
tcp_prot_mem(memcg, vec[0], 0);
|
|
tcp_prot_mem(memcg, vec[1], 1);
|
|
tcp_prot_mem(memcg, vec[2], 2);
|
|
rcu_read_unlock();
|
|
#endif
|
|
|
|
net->ipv4.sysctl_tcp_mem[0] = vec[0];
|
|
net->ipv4.sysctl_tcp_mem[1] = vec[1];
|
|
net->ipv4.sysctl_tcp_mem[2] = vec[2];
|
|
|
|
return 0;
|
|
}
|
|
|
|
int proc_tcp_fastopen_key(ctl_table *ctl, int write, void __user *buffer,
|
|
size_t *lenp, loff_t *ppos)
|
|
{
|
|
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(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(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 struct ctl_table ipv4_table[] = {
|
|
{
|
|
.procname = "tcp_timestamps",
|
|
.data = &sysctl_tcp_timestamps,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_window_scaling",
|
|
.data = &sysctl_tcp_window_scaling,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_sack",
|
|
.data = &sysctl_tcp_sack,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_retrans_collapse",
|
|
.data = &sysctl_tcp_retrans_collapse,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "ip_default_ttl",
|
|
.data = &sysctl_ip_default_ttl,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &ip_ttl_min,
|
|
.extra2 = &ip_ttl_max,
|
|
},
|
|
{
|
|
.procname = "ip_no_pmtu_disc",
|
|
.data = &ipv4_config.no_pmtu_disc,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "ip_nonlocal_bind",
|
|
.data = &sysctl_ip_nonlocal_bind,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_syn_retries",
|
|
.data = &sysctl_tcp_syn_retries,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_synack_retries",
|
|
.data = &sysctl_tcp_synack_retries,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_max_orphans",
|
|
.data = &sysctl_tcp_max_orphans,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_max_tw_buckets",
|
|
.data = &tcp_death_row.sysctl_max_tw_buckets,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "ip_early_demux",
|
|
.data = &sysctl_ip_early_demux,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "ip_dynaddr",
|
|
.data = &sysctl_ip_dynaddr,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_keepalive_time",
|
|
.data = &sysctl_tcp_keepalive_time,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.procname = "tcp_keepalive_probes",
|
|
.data = &sysctl_tcp_keepalive_probes,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_keepalive_intvl",
|
|
.data = &sysctl_tcp_keepalive_intvl,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.procname = "tcp_retries1",
|
|
.data = &sysctl_tcp_retries1,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra2 = &tcp_retr1_max
|
|
},
|
|
{
|
|
.procname = "tcp_retries2",
|
|
.data = &sysctl_tcp_retries2,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_fin_timeout",
|
|
.data = &sysctl_tcp_fin_timeout,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_jiffies,
|
|
},
|
|
#ifdef CONFIG_SYN_COOKIES
|
|
{
|
|
.procname = "tcp_syncookies",
|
|
.data = &sysctl_tcp_syncookies,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
#endif
|
|
{
|
|
.procname = "tcp_fastopen",
|
|
.data = &sysctl_tcp_fastopen,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "tcp_fastopen_key",
|
|
.mode = 0600,
|
|
.maxlen = ((TCP_FASTOPEN_KEY_LENGTH * 2) + 10),
|
|
.proc_handler = proc_tcp_fastopen_key,
|
|
},
|
|
{
|
|
.procname = "tcp_tw_recycle",
|
|
.data = &tcp_death_row.sysctl_tw_recycle,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_abort_on_overflow",
|
|
.data = &sysctl_tcp_abort_on_overflow,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_stdurg",
|
|
.data = &sysctl_tcp_stdurg,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_rfc1337",
|
|
.data = &sysctl_tcp_rfc1337,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_max_syn_backlog",
|
|
.data = &sysctl_max_syn_backlog,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "ip_local_port_range",
|
|
.data = &sysctl_local_ports.range,
|
|
.maxlen = sizeof(sysctl_local_ports.range),
|
|
.mode = 0644,
|
|
.proc_handler = ipv4_local_port_range,
|
|
},
|
|
{
|
|
.procname = "ip_local_reserved_ports",
|
|
.data = NULL, /* initialized in sysctl_ipv4_init */
|
|
.maxlen = 65536,
|
|
.mode = 0644,
|
|
.proc_handler = proc_do_large_bitmap,
|
|
},
|
|
{
|
|
.procname = "igmp_max_memberships",
|
|
.data = &sysctl_igmp_max_memberships,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "igmp_max_msf",
|
|
.data = &sysctl_igmp_max_msf,
|
|
.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_orphan_retries",
|
|
.data = &sysctl_tcp_orphan_retries,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_fack",
|
|
.data = &sysctl_tcp_fack,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_reordering",
|
|
.data = &sysctl_tcp_reordering,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_ecn",
|
|
.data = &sysctl_tcp_ecn,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_dsack",
|
|
.data = &sysctl_tcp_dsack,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_wmem",
|
|
.data = &sysctl_tcp_wmem,
|
|
.maxlen = sizeof(sysctl_tcp_wmem),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_rmem",
|
|
.data = &sysctl_tcp_rmem,
|
|
.maxlen = sizeof(sysctl_tcp_rmem),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_app_win",
|
|
.data = &sysctl_tcp_app_win,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_adv_win_scale",
|
|
.data = &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_tw_reuse",
|
|
.data = &sysctl_tcp_tw_reuse,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_frto",
|
|
.data = &sysctl_tcp_frto,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_frto_response",
|
|
.data = &sysctl_tcp_frto_response,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_low_latency",
|
|
.data = &sysctl_tcp_low_latency,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_no_metrics_save",
|
|
.data = &sysctl_tcp_nometrics_save,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "tcp_moderate_rcvbuf",
|
|
.data = &sysctl_tcp_moderate_rcvbuf,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "tcp_tso_win_divisor",
|
|
.data = &sysctl_tcp_tso_win_divisor,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "tcp_congestion_control",
|
|
.mode = 0644,
|
|
.maxlen = TCP_CA_NAME_MAX,
|
|
.proc_handler = proc_tcp_congestion_control,
|
|
},
|
|
{
|
|
.procname = "tcp_abc",
|
|
.data = &sysctl_tcp_abc,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "tcp_mtu_probing",
|
|
.data = &sysctl_tcp_mtu_probing,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "tcp_base_mss",
|
|
.data = &sysctl_tcp_base_mss,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "tcp_workaround_signed_windows",
|
|
.data = &sysctl_tcp_workaround_signed_windows,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_limit_output_bytes",
|
|
.data = &sysctl_tcp_limit_output_bytes,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_challenge_ack_limit",
|
|
.data = &sysctl_tcp_challenge_ack_limit,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
#ifdef CONFIG_NET_DMA
|
|
{
|
|
.procname = "tcp_dma_copybreak",
|
|
.data = &sysctl_tcp_dma_copybreak,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
#endif
|
|
{
|
|
.procname = "tcp_slow_start_after_idle",
|
|
.data = &sysctl_tcp_slow_start_after_idle,
|
|
.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_max_ssthresh",
|
|
.data = &sysctl_tcp_max_ssthresh,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "tcp_cookie_size",
|
|
.data = &sysctl_tcp_cookie_size,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_thin_linear_timeouts",
|
|
.data = &sysctl_tcp_thin_linear_timeouts,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_thin_dupack",
|
|
.data = &sysctl_tcp_thin_dupack,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{
|
|
.procname = "tcp_early_retrans",
|
|
.data = &sysctl_tcp_early_retrans,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
.extra2 = &two,
|
|
},
|
|
{
|
|
.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 = &zero
|
|
},
|
|
{
|
|
.procname = "udp_wmem_min",
|
|
.data = &sysctl_udp_wmem_min,
|
|
.maxlen = sizeof(sysctl_udp_wmem_min),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero
|
|
},
|
|
{ }
|
|
};
|
|
|
|
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.sysctl_ping_group_range,
|
|
.maxlen = sizeof(gid_t)*2,
|
|
.mode = 0644,
|
|
.proc_handler = ipv4_ping_group_range,
|
|
},
|
|
{
|
|
.procname = "tcp_mem",
|
|
.maxlen = sizeof(init_net.ipv4.sysctl_tcp_mem),
|
|
.mode = 0644,
|
|
.proc_handler = ipv4_tcp_mem,
|
|
},
|
|
{ }
|
|
};
|
|
|
|
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)) {
|
|
table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL);
|
|
if (table == NULL)
|
|
goto err_alloc;
|
|
|
|
table[0].data =
|
|
&net->ipv4.sysctl_icmp_echo_ignore_all;
|
|
table[1].data =
|
|
&net->ipv4.sysctl_icmp_echo_ignore_broadcasts;
|
|
table[2].data =
|
|
&net->ipv4.sysctl_icmp_ignore_bogus_error_responses;
|
|
table[3].data =
|
|
&net->ipv4.sysctl_icmp_errors_use_inbound_ifaddr;
|
|
table[4].data =
|
|
&net->ipv4.sysctl_icmp_ratelimit;
|
|
table[5].data =
|
|
&net->ipv4.sysctl_icmp_ratemask;
|
|
table[6].data =
|
|
&net->ipv4.sysctl_ping_group_range;
|
|
|
|
/* Don't export sysctls to unprivileged users */
|
|
if (net->user_ns != &init_user_ns)
|
|
table[0].procname = NULL;
|
|
}
|
|
|
|
/*
|
|
* Sane defaults - nobody may create ping sockets.
|
|
* Boot scripts should set this to distro-specific group.
|
|
*/
|
|
net->ipv4.sysctl_ping_group_range[0] = make_kgid(&init_user_ns, 1);
|
|
net->ipv4.sysctl_ping_group_range[1] = make_kgid(&init_user_ns, 0);
|
|
|
|
tcp_init_mem(net);
|
|
|
|
net->ipv4.ipv4_hdr = register_net_sysctl(net, "net/ipv4", table);
|
|
if (net->ipv4.ipv4_hdr == NULL)
|
|
goto err_reg;
|
|
|
|
return 0;
|
|
|
|
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;
|
|
|
|
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;
|
|
struct ctl_table *i;
|
|
|
|
for (i = ipv4_table; i->procname; i++) {
|
|
if (strcmp(i->procname, "ip_local_reserved_ports") == 0) {
|
|
i->data = sysctl_local_reserved_ports;
|
|
break;
|
|
}
|
|
}
|
|
if (!i->procname)
|
|
return -EINVAL;
|
|
|
|
hdr = register_net_sysctl(&init_net, "net/ipv4", ipv4_table);
|
|
if (hdr == NULL)
|
|
return -ENOMEM;
|
|
|
|
if (register_pernet_subsys(&ipv4_sysctl_ops)) {
|
|
unregister_net_sysctl_table(hdr);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
__initcall(sysctl_ipv4_init);
|