| /* |
| * 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 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_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 }; |
| |
| /* 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) { |
| if (range[1] < range[0]) |
| ret = -EINVAL; |
| else |
| set_local_port_range(net, 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; |
| 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)) |
| return -EINVAL; |
| if (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) |
| { |
| char val[TCP_CA_NAME_MAX]; |
| struct 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(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 *ctl, int write, |
| void __user *buffer, size_t *lenp, |
| loff_t *ppos) |
| { |
| struct ctl_table tbl = { .maxlen = (TCP_FASTOPEN_KEY_LENGTH * 2 + 10) }; |
| struct tcp_fastopen_context *ctxt; |
| u32 user_key[4]; /* 16 bytes, matching TCP_FASTOPEN_KEY_LENGTH */ |
| __le32 key[4]; |
| int ret, i; |
| |
| tbl.data = kmalloc(tbl.maxlen, GFP_KERNEL); |
| if (!tbl.data) |
| return -ENOMEM; |
| |
| rcu_read_lock(); |
| ctxt = rcu_dereference(tcp_fastopen_ctx); |
| if (ctxt) |
| memcpy(key, ctxt->key, TCP_FASTOPEN_KEY_LENGTH); |
| else |
| memset(key, 0, sizeof(key)); |
| rcu_read_unlock(); |
| |
| for (i = 0; i < ARRAY_SIZE(key); i++) |
| user_key[i] = le32_to_cpu(key[i]); |
| |
| 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; |
| } |
| /* Generate a dummy secret but don't publish it. This |
| * is needed so we don't regenerate a new key on the |
| * first invocation of tcp_fastopen_cookie_gen |
| */ |
| tcp_fastopen_init_key_once(false); |
| |
| for (i = 0; i < ARRAY_SIZE(user_key); i++) |
| key[i] = cpu_to_le32(user_key[i]); |
| |
| tcp_fastopen_reset_cipher(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 = "tcp_syn_retries", |
| .data = &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 = &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 = "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 |
| }, |
| #ifdef CONFIG_IP_MULTICAST |
| { |
| .procname = "igmp_qrv", |
| .data = &sysctl_igmp_qrv, |
| .maxlen = sizeof(int), |
| .mode = 0644, |
| .proc_handler = proc_dointvec_minmax, |
| .extra1 = &one |
| }, |
| #endif |
| { |
| .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_recovery", |
| .data = &sysctl_tcp_recovery, |
| .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_max_reordering", |
| .data = &sysctl_tcp_max_reordering, |
| .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_mem", |
| .maxlen = sizeof(sysctl_tcp_mem), |
| .data = &sysctl_tcp_mem, |
| .mode = 0644, |
| .proc_handler = proc_doulongvec_minmax, |
| }, |
| { |
| .procname = "tcp_wmem", |
| .data = &sysctl_tcp_wmem, |
| .maxlen = sizeof(sysctl_tcp_wmem), |
| .mode = 0644, |
| .proc_handler = proc_dointvec_minmax, |
| .extra1 = &one, |
| }, |
| { |
| .procname = "tcp_notsent_lowat", |
| .data = &sysctl_tcp_notsent_lowat, |
| .maxlen = sizeof(sysctl_tcp_notsent_lowat), |
| .mode = 0644, |
| .proc_handler = proc_dointvec, |
| }, |
| { |
| .procname = "tcp_rmem", |
| .data = &sysctl_tcp_rmem, |
| .maxlen = sizeof(sysctl_tcp_rmem), |
| .mode = 0644, |
| .proc_handler = proc_dointvec_minmax, |
| .extra1 = &one, |
| }, |
| { |
| .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_min_rtt_wlen", |
| .data = &sysctl_tcp_min_rtt_wlen, |
| .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_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 |
| }, |
| { |
| .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_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 = &four, |
| }, |
| { |
| .procname = "tcp_min_tso_segs", |
| .data = &sysctl_tcp_min_tso_segs, |
| .maxlen = sizeof(int), |
| .mode = 0644, |
| .proc_handler = proc_dointvec_minmax, |
| .extra1 = &one, |
| .extra2 = &gso_max_segs, |
| }, |
| { |
| .procname = "tcp_pacing_ss_ratio", |
| .data = &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 = &sysctl_tcp_pacing_ca_ratio, |
| .maxlen = sizeof(int), |
| .mode = 0644, |
| .proc_handler = proc_dointvec_minmax, |
| .extra1 = &zero, |
| .extra2 = &thousand, |
| }, |
| { |
| .procname = "tcp_autocorking", |
| .data = &sysctl_tcp_autocorking, |
| .maxlen = sizeof(int), |
| .mode = 0644, |
| .proc_handler = proc_dointvec_minmax, |
| .extra1 = &zero, |
| .extra2 = &one, |
| }, |
| { |
| .procname = "tcp_invalid_ratelimit", |
| .data = &sysctl_tcp_invalid_ratelimit, |
| .maxlen = sizeof(int), |
| .mode = 0644, |
| .proc_handler = proc_dointvec_ms_jiffies, |
| }, |
| { |
| .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_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, |
| }, |
| { |
| .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 = &sysctl_igmp_llm_reports, |
| .maxlen = sizeof(int), |
| .mode = 0644, |
| .proc_handler = proc_dointvec |
| }, |
| { } |
| }; |
| |
| 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); |