![Linus Torvalds](/assets/img/avatar_default.png)
Pull networking updates from David Miller: "Most notable changes in here: 1) By far the biggest accomplishment, thanks to a large range of contributors, is the addition of multi-send for transmit. This is the result of discussions back in Chicago, and the hard work of several individuals. Now, when the ->ndo_start_xmit() method of a driver sees skb->xmit_more as true, it can choose to defer the doorbell telling the driver to start processing the new TX queue entires. skb->xmit_more means that the generic networking is guaranteed to call the driver immediately with another SKB to send. There is logic added to the qdisc layer to dequeue multiple packets at a time, and the handling mis-predicted offloads in software is now done with no locks held. Finally, pktgen is extended to have a "burst" parameter that can be used to test a multi-send implementation. Several drivers have xmit_more support: i40e, igb, ixgbe, mlx4, virtio_net Adding support is almost trivial, so export more drivers to support this optimization soon. I want to thank, in no particular or implied order, Jesper Dangaard Brouer, Eric Dumazet, Alexander Duyck, Tom Herbert, Jamal Hadi Salim, John Fastabend, Florian Westphal, Daniel Borkmann, David Tat, Hannes Frederic Sowa, and Rusty Russell. 2) PTP and timestamping support in bnx2x, from Michal Kalderon. 3) Allow adjusting the rx_copybreak threshold for a driver via ethtool, and add rx_copybreak support to enic driver. From Govindarajulu Varadarajan. 4) Significant enhancements to the generic PHY layer and the bcm7xxx driver in particular (EEE support, auto power down, etc.) from Florian Fainelli. 5) Allow raw buffers to be used for flow dissection, allowing drivers to determine the optimal "linear pull" size for devices that DMA into pools of pages. The objective is to get exactly the necessary amount of headers into the linear SKB area pre-pulled, but no more. The new interface drivers use is eth_get_headlen(). From WANG Cong, with driver conversions (several had their own by-hand duplicated implementations) by Alexander Duyck and Eric Dumazet. 6) Support checksumming more smoothly and efficiently for encapsulations, and add "foo over UDP" facility. From Tom Herbert. 7) Add Broadcom SF2 switch driver to DSA layer, from Florian Fainelli. 8) eBPF now can load programs via a system call and has an extensive testsuite. Alexei Starovoitov and Daniel Borkmann. 9) Major overhaul of the packet scheduler to use RCU in several major areas such as the classifiers and rate estimators. From John Fastabend. 10) Add driver for Intel FM10000 Ethernet Switch, from Alexander Duyck. 11) Rearrange TCP_SKB_CB() to reduce cache line misses, from Eric Dumazet. 12) Add Datacenter TCP congestion control algorithm support, From Florian Westphal. 13) Reorganize sk_buff so that __copy_skb_header() is significantly faster. From Eric Dumazet" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1558 commits) netlabel: directly return netlbl_unlabel_genl_init() net: add netdev_txq_bql_{enqueue, complete}_prefetchw() helpers net: description of dma_cookie cause make xmldocs warning cxgb4: clean up a type issue cxgb4: potential shift wrapping bug i40e: skb->xmit_more support net: fs_enet: Add NAPI TX net: fs_enet: Remove non NAPI RX r8169:add support for RTL8168EP net_sched: copy exts->type in tcf_exts_change() wimax: convert printk to pr_foo() af_unix: remove 0 assignment on static ipv6: Do not warn for informational ICMP messages, regardless of type. Update Intel Ethernet Driver maintainers list bridge: Save frag_max_size between PRE_ROUTING and POST_ROUTING tipc: fix bug in multicast congestion handling net: better IFF_XMIT_DST_RELEASE support net/mlx4_en: remove NETDEV_TX_BUSY 3c59x: fix bad split of cpu_to_le32(pci_map_single()) net: bcmgenet: fix Tx ring priority programming ...
943 lines
22 KiB
C
943 lines
22 KiB
C
/*
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* sysctl_net_ipv4.c: sysctl interface to net IPV4 subsystem.
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*
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* Begun April 1, 1996, Mike Shaver.
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* Added /proc/sys/net/ipv4 directory entry (empty =) ). [MS]
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*/
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/sysctl.h>
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#include <linux/igmp.h>
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#include <linux/inetdevice.h>
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#include <linux/seqlock.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/nsproxy.h>
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#include <linux/swap.h>
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#include <net/snmp.h>
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#include <net/icmp.h>
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#include <net/ip.h>
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#include <net/route.h>
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#include <net/tcp.h>
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#include <net/udp.h>
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#include <net/cipso_ipv4.h>
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#include <net/inet_frag.h>
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#include <net/ping.h>
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#include <net/tcp_memcontrol.h>
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static int zero;
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static int one = 1;
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static int four = 4;
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static int gso_max_segs = GSO_MAX_SEGS;
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static int tcp_retr1_max = 255;
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static int ip_local_port_range_min[] = { 1, 1 };
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static int ip_local_port_range_max[] = { 65535, 65535 };
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static int tcp_adv_win_scale_min = -31;
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static int tcp_adv_win_scale_max = 31;
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static int ip_ttl_min = 1;
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static int ip_ttl_max = 255;
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static int tcp_syn_retries_min = 1;
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static int tcp_syn_retries_max = MAX_TCP_SYNCNT;
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static int ip_ping_group_range_min[] = { 0, 0 };
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static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX };
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/* Update system visible IP port range */
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static void set_local_port_range(struct net *net, int range[2])
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{
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write_seqlock(&net->ipv4.ip_local_ports.lock);
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net->ipv4.ip_local_ports.range[0] = range[0];
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net->ipv4.ip_local_ports.range[1] = range[1];
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write_sequnlock(&net->ipv4.ip_local_ports.lock);
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}
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/* Validate changes from /proc interface. */
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static int ipv4_local_port_range(struct ctl_table *table, int write,
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void __user *buffer,
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size_t *lenp, loff_t *ppos)
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{
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struct net *net =
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container_of(table->data, struct net, ipv4.ip_local_ports.range);
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int ret;
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int range[2];
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struct ctl_table tmp = {
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.data = &range,
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.maxlen = sizeof(range),
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.mode = table->mode,
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.extra1 = &ip_local_port_range_min,
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.extra2 = &ip_local_port_range_max,
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};
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inet_get_local_port_range(net, &range[0], &range[1]);
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ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
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if (write && ret == 0) {
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if (range[1] < range[0])
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ret = -EINVAL;
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else
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set_local_port_range(net, range);
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}
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return ret;
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}
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static void inet_get_ping_group_range_table(struct ctl_table *table, kgid_t *low, kgid_t *high)
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{
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kgid_t *data = table->data;
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struct net *net =
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container_of(table->data, struct net, ipv4.ping_group_range.range);
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unsigned int seq;
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do {
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seq = read_seqbegin(&net->ipv4.ip_local_ports.lock);
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*low = data[0];
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*high = data[1];
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} while (read_seqretry(&net->ipv4.ip_local_ports.lock, seq));
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}
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/* Update system visible IP port range */
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static void set_ping_group_range(struct ctl_table *table, kgid_t low, kgid_t high)
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{
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kgid_t *data = table->data;
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struct net *net =
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container_of(table->data, struct net, ipv4.ping_group_range.range);
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write_seqlock(&net->ipv4.ip_local_ports.lock);
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data[0] = low;
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data[1] = high;
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write_sequnlock(&net->ipv4.ip_local_ports.lock);
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}
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/* Validate changes from /proc interface. */
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static int ipv4_ping_group_range(struct ctl_table *table, int write,
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void __user *buffer,
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size_t *lenp, loff_t *ppos)
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{
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struct user_namespace *user_ns = current_user_ns();
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int ret;
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gid_t urange[2];
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kgid_t low, high;
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struct ctl_table tmp = {
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.data = &urange,
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.maxlen = sizeof(urange),
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.mode = table->mode,
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.extra1 = &ip_ping_group_range_min,
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.extra2 = &ip_ping_group_range_max,
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};
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inet_get_ping_group_range_table(table, &low, &high);
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urange[0] = from_kgid_munged(user_ns, low);
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urange[1] = from_kgid_munged(user_ns, high);
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ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
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if (write && ret == 0) {
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low = make_kgid(user_ns, urange[0]);
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high = make_kgid(user_ns, urange[1]);
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if (!gid_valid(low) || !gid_valid(high) ||
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(urange[1] < urange[0]) || gid_lt(high, low)) {
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low = make_kgid(&init_user_ns, 1);
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high = make_kgid(&init_user_ns, 0);
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}
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set_ping_group_range(table, low, high);
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}
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return ret;
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}
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static int proc_tcp_congestion_control(struct ctl_table *ctl, int write,
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void __user *buffer, size_t *lenp, loff_t *ppos)
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{
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char val[TCP_CA_NAME_MAX];
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struct ctl_table tbl = {
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.data = val,
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.maxlen = TCP_CA_NAME_MAX,
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};
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int ret;
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tcp_get_default_congestion_control(val);
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ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
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if (write && ret == 0)
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ret = tcp_set_default_congestion_control(val);
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return ret;
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}
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static int proc_tcp_available_congestion_control(struct ctl_table *ctl,
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int write,
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void __user *buffer, size_t *lenp,
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loff_t *ppos)
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{
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struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, };
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int ret;
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tbl.data = kmalloc(tbl.maxlen, GFP_USER);
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if (!tbl.data)
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return -ENOMEM;
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tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX);
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ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
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kfree(tbl.data);
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return ret;
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}
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static int proc_allowed_congestion_control(struct ctl_table *ctl,
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int write,
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void __user *buffer, size_t *lenp,
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loff_t *ppos)
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{
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struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX };
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int ret;
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tbl.data = kmalloc(tbl.maxlen, GFP_USER);
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if (!tbl.data)
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return -ENOMEM;
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tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen);
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ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
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if (write && ret == 0)
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ret = tcp_set_allowed_congestion_control(tbl.data);
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kfree(tbl.data);
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return ret;
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}
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static int proc_tcp_fastopen_key(struct ctl_table *ctl, int write,
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void __user *buffer, size_t *lenp,
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loff_t *ppos)
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{
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struct ctl_table tbl = { .maxlen = (TCP_FASTOPEN_KEY_LENGTH * 2 + 10) };
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struct tcp_fastopen_context *ctxt;
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int ret;
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u32 user_key[4]; /* 16 bytes, matching TCP_FASTOPEN_KEY_LENGTH */
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tbl.data = kmalloc(tbl.maxlen, GFP_KERNEL);
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if (!tbl.data)
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return -ENOMEM;
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rcu_read_lock();
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ctxt = rcu_dereference(tcp_fastopen_ctx);
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if (ctxt)
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memcpy(user_key, ctxt->key, TCP_FASTOPEN_KEY_LENGTH);
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else
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memset(user_key, 0, sizeof(user_key));
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rcu_read_unlock();
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snprintf(tbl.data, tbl.maxlen, "%08x-%08x-%08x-%08x",
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user_key[0], user_key[1], user_key[2], user_key[3]);
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ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
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if (write && ret == 0) {
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if (sscanf(tbl.data, "%x-%x-%x-%x", user_key, user_key + 1,
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user_key + 2, user_key + 3) != 4) {
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ret = -EINVAL;
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goto bad_key;
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}
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/* Generate a dummy secret but don't publish it. This
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* is needed so we don't regenerate a new key on the
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* first invocation of tcp_fastopen_cookie_gen
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*/
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tcp_fastopen_init_key_once(false);
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tcp_fastopen_reset_cipher(user_key, TCP_FASTOPEN_KEY_LENGTH);
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}
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bad_key:
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pr_debug("proc FO key set 0x%x-%x-%x-%x <- 0x%s: %u\n",
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user_key[0], user_key[1], user_key[2], user_key[3],
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(char *)tbl.data, ret);
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kfree(tbl.data);
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return ret;
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}
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static struct ctl_table ipv4_table[] = {
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{
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.procname = "tcp_timestamps",
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.data = &sysctl_tcp_timestamps,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec
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},
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{
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.procname = "tcp_window_scaling",
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.data = &sysctl_tcp_window_scaling,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec
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},
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{
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.procname = "tcp_sack",
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.data = &sysctl_tcp_sack,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec
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},
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{
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.procname = "tcp_retrans_collapse",
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.data = &sysctl_tcp_retrans_collapse,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec
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},
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{
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.procname = "ip_default_ttl",
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.data = &sysctl_ip_default_ttl,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = &ip_ttl_min,
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.extra2 = &ip_ttl_max,
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},
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{
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.procname = "tcp_syn_retries",
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.data = &sysctl_tcp_syn_retries,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = &tcp_syn_retries_min,
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.extra2 = &tcp_syn_retries_max
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},
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{
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.procname = "tcp_synack_retries",
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.data = &sysctl_tcp_synack_retries,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec
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},
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{
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.procname = "tcp_max_orphans",
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.data = &sysctl_tcp_max_orphans,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec
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},
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{
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.procname = "tcp_max_tw_buckets",
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.data = &tcp_death_row.sysctl_max_tw_buckets,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec
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},
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{
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.procname = "ip_early_demux",
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.data = &sysctl_ip_early_demux,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec
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},
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{
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.procname = "ip_dynaddr",
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.data = &sysctl_ip_dynaddr,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec
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},
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{
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.procname = "tcp_keepalive_time",
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.data = &sysctl_tcp_keepalive_time,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec_jiffies,
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},
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{
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.procname = "tcp_keepalive_probes",
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.data = &sysctl_tcp_keepalive_probes,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec
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},
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{
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.procname = "tcp_keepalive_intvl",
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.data = &sysctl_tcp_keepalive_intvl,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec_jiffies,
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},
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{
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.procname = "tcp_retries1",
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.data = &sysctl_tcp_retries1,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra2 = &tcp_retr1_max
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},
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{
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.procname = "tcp_retries2",
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.data = &sysctl_tcp_retries2,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec
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},
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{
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.procname = "tcp_fin_timeout",
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.data = &sysctl_tcp_fin_timeout,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec_jiffies,
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},
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#ifdef CONFIG_SYN_COOKIES
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{
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.procname = "tcp_syncookies",
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.data = &sysctl_tcp_syncookies,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec
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},
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#endif
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{
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.procname = "tcp_fastopen",
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.data = &sysctl_tcp_fastopen,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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{
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.procname = "tcp_fastopen_key",
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.mode = 0600,
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.maxlen = ((TCP_FASTOPEN_KEY_LENGTH * 2) + 10),
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.proc_handler = proc_tcp_fastopen_key,
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},
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{
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.procname = "tcp_tw_recycle",
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.data = &tcp_death_row.sysctl_tw_recycle,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec
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},
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{
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.procname = "tcp_abort_on_overflow",
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.data = &sysctl_tcp_abort_on_overflow,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec
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},
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{
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.procname = "tcp_stdurg",
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.data = &sysctl_tcp_stdurg,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec
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},
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{
|
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.procname = "tcp_rfc1337",
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.data = &sysctl_tcp_rfc1337,
|
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.maxlen = sizeof(int),
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.mode = 0644,
|
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.proc_handler = proc_dointvec
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},
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|
{
|
|
.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_reordering",
|
|
.data = &sysctl_tcp_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_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_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
|
|
},
|
|
{
|
|
.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 = &zero,
|
|
.extra2 = &gso_max_segs,
|
|
},
|
|
{
|
|
.procname = "tcp_autocorking",
|
|
.data = &sysctl_tcp_autocorking,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
.extra2 = &one,
|
|
},
|
|
{
|
|
.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 = "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,
|
|
},
|
|
{ }
|
|
};
|
|
|
|
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 == NULL)
|
|
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 == NULL)
|
|
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 == NULL)
|
|
return -ENOMEM;
|
|
|
|
if (register_pernet_subsys(&ipv4_sysctl_ops)) {
|
|
unregister_net_sysctl_table(hdr);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
__initcall(sysctl_ipv4_init);
|