| /* |
| * 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 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 }; |
| static int tcp_delack_seg_min = TCP_DELACK_MIN; |
| static int tcp_delack_seg_max = 60; |
| static int tcp_use_userconfig_min; |
| static int tcp_use_userconfig_max = 1; |
| |
| /* 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, gid_t *low, gid_t *high) |
| { |
| gid_t *data = table->data; |
| unsigned 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, gid_t range[2]) |
| { |
| gid_t *data = table->data; |
| write_seqlock(&sysctl_local_ports.lock); |
| data[0] = range[0]; |
| data[1] = range[1]; |
| 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) |
| { |
| int ret; |
| gid_t range[2]; |
| ctl_table tmp = { |
| .data = &range, |
| .maxlen = sizeof(range), |
| .mode = table->mode, |
| .extra1 = &ip_ping_group_range_min, |
| .extra2 = &ip_ping_group_range_max, |
| }; |
| |
| inet_get_ping_group_range_table(table, range, range + 1); |
| ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
| |
| if (write && ret == 0) |
| set_ping_group_range(table, range); |
| |
| 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_CGROUP_MEM_RES_CTLR_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_CGROUP_MEM_RES_CTLR_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; |
| } |
| |
| 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_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_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 |
| }, |
| #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 = "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 |
| }, |
| { |
| .procname = "tcp_delack_seg", |
| .data = &sysctl_tcp_delack_seg, |
| .maxlen = sizeof(sysctl_tcp_delack_seg), |
| .mode = 0644, |
| .proc_handler = tcp_proc_delayed_ack_control, |
| .extra1 = &tcp_delack_seg_min, |
| .extra2 = &tcp_delack_seg_max, |
| }, |
| { |
| .procname = "tcp_use_userconfig", |
| .data = &sysctl_tcp_use_userconfig, |
| .maxlen = sizeof(sysctl_tcp_use_userconfig), |
| .mode = 0644, |
| .proc_handler = tcp_use_userconfig_sysctl_handler, |
| .extra1 = &tcp_use_userconfig_min, |
| .extra2 = &tcp_use_userconfig_max, |
| }, |
| |
| { } |
| }; |
| |
| 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 = "rt_cache_rebuild_count", |
| .data = &init_net.ipv4.sysctl_rt_cache_rebuild_count, |
| .maxlen = sizeof(int), |
| .mode = 0644, |
| .proc_handler = proc_dointvec |
| }, |
| { |
| .procname = "ping_group_range", |
| .data = &init_net.ipv4.sysctl_ping_group_range, |
| .maxlen = sizeof(init_net.ipv4.sysctl_ping_group_range), |
| .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, |
| }, |
| { |
| .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, |
| }, |
| { } |
| }; |
| |
| struct ctl_path net_ipv4_ctl_path[] = { |
| { .procname = "net", }, |
| { .procname = "ipv4", }, |
| { }, |
| }; |
| EXPORT_SYMBOL_GPL(net_ipv4_ctl_path); |
| |
| 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_rt_cache_rebuild_count; |
| table[7].data = |
| &net->ipv4.sysctl_ping_group_range; |
| |
| } |
| |
| /* |
| * Sane defaults - nobody may create ping sockets. |
| * Boot scripts should set this to distro-specific group. |
| */ |
| net->ipv4.sysctl_ping_group_range[0] = 1; |
| net->ipv4.sysctl_ping_group_range[1] = 0; |
| |
| net->ipv4.sysctl_rt_cache_rebuild_count = 4; |
| |
| tcp_init_mem(net); |
| |
| net->ipv4.ipv4_hdr = register_net_sysctl_table(net, |
| net_ipv4_ctl_path, 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_sysctl_paths(net_ipv4_ctl_path, ipv4_table); |
| if (hdr == NULL) |
| return -ENOMEM; |
| |
| if (register_pernet_subsys(&ipv4_sysctl_ops)) { |
| unregister_sysctl_table(hdr); |
| return -ENOMEM; |
| } |
| |
| return 0; |
| } |
| |
| __initcall(sysctl_ipv4_init); |