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![Ingo Molnar](/assets/img/avatar_default.png)
Semaphore to mutex conversion. The conversion was generated via scripts, and the result was validated automatically via a script as well. Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Dave Jones <davej@codemonkey.org.uk> Cc: Paul Mackerras <paulus@samba.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Jens Axboe <axboe@suse.de> Cc: Neil Brown <neilb@cse.unsw.edu.au> Acked-by: Alasdair G Kergon <agk@redhat.com> Cc: Greg KH <greg@kroah.com> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Adam Belay <ambx1@neo.rr.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2400 lines
55 KiB
C
2400 lines
55 KiB
C
/*
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* IPVS An implementation of the IP virtual server support for the
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* LINUX operating system. IPVS is now implemented as a module
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* over the NetFilter framework. IPVS can be used to build a
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* high-performance and highly available server based on a
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* cluster of servers.
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*
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* Version: $Id: ip_vs_ctl.c,v 1.36 2003/06/08 09:31:19 wensong Exp $
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*
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* Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
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* Peter Kese <peter.kese@ijs.si>
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* Julian Anastasov <ja@ssi.bg>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Changes:
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*
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/capability.h>
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#include <linux/fs.h>
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#include <linux/sysctl.h>
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#include <linux/proc_fs.h>
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#include <linux/workqueue.h>
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#include <linux/swap.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/netfilter.h>
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#include <linux/netfilter_ipv4.h>
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#include <linux/mutex.h>
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#include <net/ip.h>
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#include <net/route.h>
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#include <net/sock.h>
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#include <asm/uaccess.h>
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#include <net/ip_vs.h>
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/* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */
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static DEFINE_MUTEX(__ip_vs_mutex);
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/* lock for service table */
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static DEFINE_RWLOCK(__ip_vs_svc_lock);
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/* lock for table with the real services */
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static DEFINE_RWLOCK(__ip_vs_rs_lock);
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/* lock for state and timeout tables */
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static DEFINE_RWLOCK(__ip_vs_securetcp_lock);
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/* lock for drop entry handling */
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static DEFINE_SPINLOCK(__ip_vs_dropentry_lock);
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/* lock for drop packet handling */
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static DEFINE_SPINLOCK(__ip_vs_droppacket_lock);
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/* 1/rate drop and drop-entry variables */
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int ip_vs_drop_rate = 0;
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int ip_vs_drop_counter = 0;
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static atomic_t ip_vs_dropentry = ATOMIC_INIT(0);
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/* number of virtual services */
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static int ip_vs_num_services = 0;
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/* sysctl variables */
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static int sysctl_ip_vs_drop_entry = 0;
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static int sysctl_ip_vs_drop_packet = 0;
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static int sysctl_ip_vs_secure_tcp = 0;
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static int sysctl_ip_vs_amemthresh = 1024;
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static int sysctl_ip_vs_am_droprate = 10;
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int sysctl_ip_vs_cache_bypass = 0;
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int sysctl_ip_vs_expire_nodest_conn = 0;
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int sysctl_ip_vs_expire_quiescent_template = 0;
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int sysctl_ip_vs_sync_threshold[2] = { 3, 50 };
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int sysctl_ip_vs_nat_icmp_send = 0;
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#ifdef CONFIG_IP_VS_DEBUG
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static int sysctl_ip_vs_debug_level = 0;
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int ip_vs_get_debug_level(void)
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{
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return sysctl_ip_vs_debug_level;
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}
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#endif
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/*
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* update_defense_level is called from keventd and from sysctl,
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* so it needs to protect itself from softirqs
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*/
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static void update_defense_level(void)
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{
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struct sysinfo i;
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static int old_secure_tcp = 0;
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int availmem;
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int nomem;
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int to_change = -1;
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/* we only count free and buffered memory (in pages) */
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si_meminfo(&i);
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availmem = i.freeram + i.bufferram;
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/* however in linux 2.5 the i.bufferram is total page cache size,
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we need adjust it */
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/* si_swapinfo(&i); */
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/* availmem = availmem - (i.totalswap - i.freeswap); */
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nomem = (availmem < sysctl_ip_vs_amemthresh);
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local_bh_disable();
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/* drop_entry */
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spin_lock(&__ip_vs_dropentry_lock);
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switch (sysctl_ip_vs_drop_entry) {
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case 0:
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atomic_set(&ip_vs_dropentry, 0);
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break;
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case 1:
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if (nomem) {
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atomic_set(&ip_vs_dropentry, 1);
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sysctl_ip_vs_drop_entry = 2;
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} else {
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atomic_set(&ip_vs_dropentry, 0);
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}
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break;
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case 2:
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if (nomem) {
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atomic_set(&ip_vs_dropentry, 1);
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} else {
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atomic_set(&ip_vs_dropentry, 0);
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sysctl_ip_vs_drop_entry = 1;
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};
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break;
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case 3:
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atomic_set(&ip_vs_dropentry, 1);
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break;
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}
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spin_unlock(&__ip_vs_dropentry_lock);
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/* drop_packet */
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spin_lock(&__ip_vs_droppacket_lock);
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switch (sysctl_ip_vs_drop_packet) {
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case 0:
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ip_vs_drop_rate = 0;
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break;
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case 1:
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if (nomem) {
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ip_vs_drop_rate = ip_vs_drop_counter
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= sysctl_ip_vs_amemthresh /
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(sysctl_ip_vs_amemthresh-availmem);
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sysctl_ip_vs_drop_packet = 2;
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} else {
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ip_vs_drop_rate = 0;
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}
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break;
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case 2:
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if (nomem) {
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ip_vs_drop_rate = ip_vs_drop_counter
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= sysctl_ip_vs_amemthresh /
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(sysctl_ip_vs_amemthresh-availmem);
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} else {
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ip_vs_drop_rate = 0;
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sysctl_ip_vs_drop_packet = 1;
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}
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break;
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case 3:
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ip_vs_drop_rate = sysctl_ip_vs_am_droprate;
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break;
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}
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spin_unlock(&__ip_vs_droppacket_lock);
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/* secure_tcp */
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write_lock(&__ip_vs_securetcp_lock);
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switch (sysctl_ip_vs_secure_tcp) {
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case 0:
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if (old_secure_tcp >= 2)
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to_change = 0;
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break;
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case 1:
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if (nomem) {
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if (old_secure_tcp < 2)
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to_change = 1;
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sysctl_ip_vs_secure_tcp = 2;
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} else {
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if (old_secure_tcp >= 2)
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to_change = 0;
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}
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break;
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case 2:
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if (nomem) {
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if (old_secure_tcp < 2)
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to_change = 1;
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} else {
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if (old_secure_tcp >= 2)
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to_change = 0;
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sysctl_ip_vs_secure_tcp = 1;
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}
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break;
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case 3:
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if (old_secure_tcp < 2)
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to_change = 1;
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break;
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}
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old_secure_tcp = sysctl_ip_vs_secure_tcp;
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if (to_change >= 0)
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ip_vs_protocol_timeout_change(sysctl_ip_vs_secure_tcp>1);
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write_unlock(&__ip_vs_securetcp_lock);
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local_bh_enable();
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}
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/*
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* Timer for checking the defense
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*/
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#define DEFENSE_TIMER_PERIOD 1*HZ
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static void defense_work_handler(void *data);
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static DECLARE_WORK(defense_work, defense_work_handler, NULL);
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static void defense_work_handler(void *data)
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{
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update_defense_level();
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if (atomic_read(&ip_vs_dropentry))
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ip_vs_random_dropentry();
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schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD);
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}
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int
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ip_vs_use_count_inc(void)
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{
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return try_module_get(THIS_MODULE);
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}
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void
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ip_vs_use_count_dec(void)
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{
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module_put(THIS_MODULE);
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}
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/*
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* Hash table: for virtual service lookups
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*/
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#define IP_VS_SVC_TAB_BITS 8
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#define IP_VS_SVC_TAB_SIZE (1 << IP_VS_SVC_TAB_BITS)
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#define IP_VS_SVC_TAB_MASK (IP_VS_SVC_TAB_SIZE - 1)
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/* the service table hashed by <protocol, addr, port> */
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static struct list_head ip_vs_svc_table[IP_VS_SVC_TAB_SIZE];
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/* the service table hashed by fwmark */
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static struct list_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE];
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/*
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* Hash table: for real service lookups
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*/
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#define IP_VS_RTAB_BITS 4
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#define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS)
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#define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1)
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static struct list_head ip_vs_rtable[IP_VS_RTAB_SIZE];
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/*
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* Trash for destinations
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*/
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static LIST_HEAD(ip_vs_dest_trash);
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/*
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* FTP & NULL virtual service counters
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*/
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static atomic_t ip_vs_ftpsvc_counter = ATOMIC_INIT(0);
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static atomic_t ip_vs_nullsvc_counter = ATOMIC_INIT(0);
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/*
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* Returns hash value for virtual service
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*/
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static __inline__ unsigned
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ip_vs_svc_hashkey(unsigned proto, __u32 addr, __u16 port)
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{
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register unsigned porth = ntohs(port);
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return (proto^ntohl(addr)^(porth>>IP_VS_SVC_TAB_BITS)^porth)
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& IP_VS_SVC_TAB_MASK;
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}
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/*
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* Returns hash value of fwmark for virtual service lookup
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*/
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static __inline__ unsigned ip_vs_svc_fwm_hashkey(__u32 fwmark)
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{
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return fwmark & IP_VS_SVC_TAB_MASK;
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}
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/*
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* Hashes a service in the ip_vs_svc_table by <proto,addr,port>
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* or in the ip_vs_svc_fwm_table by fwmark.
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* Should be called with locked tables.
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*/
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static int ip_vs_svc_hash(struct ip_vs_service *svc)
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{
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unsigned hash;
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if (svc->flags & IP_VS_SVC_F_HASHED) {
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IP_VS_ERR("ip_vs_svc_hash(): request for already hashed, "
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"called from %p\n", __builtin_return_address(0));
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return 0;
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}
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if (svc->fwmark == 0) {
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/*
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* Hash it by <protocol,addr,port> in ip_vs_svc_table
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*/
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hash = ip_vs_svc_hashkey(svc->protocol, svc->addr, svc->port);
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list_add(&svc->s_list, &ip_vs_svc_table[hash]);
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} else {
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/*
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* Hash it by fwmark in ip_vs_svc_fwm_table
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*/
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hash = ip_vs_svc_fwm_hashkey(svc->fwmark);
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list_add(&svc->f_list, &ip_vs_svc_fwm_table[hash]);
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}
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svc->flags |= IP_VS_SVC_F_HASHED;
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/* increase its refcnt because it is referenced by the svc table */
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atomic_inc(&svc->refcnt);
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return 1;
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}
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/*
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* Unhashes a service from ip_vs_svc_table/ip_vs_svc_fwm_table.
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* Should be called with locked tables.
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*/
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static int ip_vs_svc_unhash(struct ip_vs_service *svc)
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{
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if (!(svc->flags & IP_VS_SVC_F_HASHED)) {
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IP_VS_ERR("ip_vs_svc_unhash(): request for unhash flagged, "
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"called from %p\n", __builtin_return_address(0));
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return 0;
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}
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if (svc->fwmark == 0) {
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/* Remove it from the ip_vs_svc_table table */
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list_del(&svc->s_list);
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} else {
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/* Remove it from the ip_vs_svc_fwm_table table */
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list_del(&svc->f_list);
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}
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svc->flags &= ~IP_VS_SVC_F_HASHED;
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atomic_dec(&svc->refcnt);
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return 1;
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}
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/*
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* Get service by {proto,addr,port} in the service table.
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*/
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static __inline__ struct ip_vs_service *
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__ip_vs_service_get(__u16 protocol, __u32 vaddr, __u16 vport)
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{
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unsigned hash;
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struct ip_vs_service *svc;
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/* Check for "full" addressed entries */
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hash = ip_vs_svc_hashkey(protocol, vaddr, vport);
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list_for_each_entry(svc, &ip_vs_svc_table[hash], s_list){
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if ((svc->addr == vaddr)
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&& (svc->port == vport)
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&& (svc->protocol == protocol)) {
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/* HIT */
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atomic_inc(&svc->usecnt);
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return svc;
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}
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}
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return NULL;
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}
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/*
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* Get service by {fwmark} in the service table.
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*/
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static __inline__ struct ip_vs_service *__ip_vs_svc_fwm_get(__u32 fwmark)
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{
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unsigned hash;
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struct ip_vs_service *svc;
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/* Check for fwmark addressed entries */
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hash = ip_vs_svc_fwm_hashkey(fwmark);
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list_for_each_entry(svc, &ip_vs_svc_fwm_table[hash], f_list) {
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if (svc->fwmark == fwmark) {
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/* HIT */
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atomic_inc(&svc->usecnt);
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return svc;
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}
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}
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return NULL;
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}
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struct ip_vs_service *
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ip_vs_service_get(__u32 fwmark, __u16 protocol, __u32 vaddr, __u16 vport)
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{
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struct ip_vs_service *svc;
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read_lock(&__ip_vs_svc_lock);
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/*
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* Check the table hashed by fwmark first
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*/
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if (fwmark && (svc = __ip_vs_svc_fwm_get(fwmark)))
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goto out;
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/*
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* Check the table hashed by <protocol,addr,port>
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* for "full" addressed entries
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*/
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svc = __ip_vs_service_get(protocol, vaddr, vport);
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|
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if (svc == NULL
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&& protocol == IPPROTO_TCP
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&& atomic_read(&ip_vs_ftpsvc_counter)
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&& (vport == FTPDATA || ntohs(vport) >= PROT_SOCK)) {
|
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/*
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* Check if ftp service entry exists, the packet
|
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* might belong to FTP data connections.
|
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*/
|
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svc = __ip_vs_service_get(protocol, vaddr, FTPPORT);
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}
|
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|
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if (svc == NULL
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&& atomic_read(&ip_vs_nullsvc_counter)) {
|
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/*
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* Check if the catch-all port (port zero) exists
|
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*/
|
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svc = __ip_vs_service_get(protocol, vaddr, 0);
|
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}
|
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out:
|
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read_unlock(&__ip_vs_svc_lock);
|
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|
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IP_VS_DBG(9, "lookup service: fwm %u %s %u.%u.%u.%u:%u %s\n",
|
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fwmark, ip_vs_proto_name(protocol),
|
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NIPQUAD(vaddr), ntohs(vport),
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svc?"hit":"not hit");
|
|
|
|
return svc;
|
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}
|
|
|
|
|
|
static inline void
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|
__ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc)
|
|
{
|
|
atomic_inc(&svc->refcnt);
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|
dest->svc = svc;
|
|
}
|
|
|
|
static inline void
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__ip_vs_unbind_svc(struct ip_vs_dest *dest)
|
|
{
|
|
struct ip_vs_service *svc = dest->svc;
|
|
|
|
dest->svc = NULL;
|
|
if (atomic_dec_and_test(&svc->refcnt))
|
|
kfree(svc);
|
|
}
|
|
|
|
|
|
/*
|
|
* Returns hash value for real service
|
|
*/
|
|
static __inline__ unsigned ip_vs_rs_hashkey(__u32 addr, __u16 port)
|
|
{
|
|
register unsigned porth = ntohs(port);
|
|
|
|
return (ntohl(addr)^(porth>>IP_VS_RTAB_BITS)^porth)
|
|
& IP_VS_RTAB_MASK;
|
|
}
|
|
|
|
/*
|
|
* Hashes ip_vs_dest in ip_vs_rtable by <proto,addr,port>.
|
|
* should be called with locked tables.
|
|
*/
|
|
static int ip_vs_rs_hash(struct ip_vs_dest *dest)
|
|
{
|
|
unsigned hash;
|
|
|
|
if (!list_empty(&dest->d_list)) {
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Hash by proto,addr,port,
|
|
* which are the parameters of the real service.
|
|
*/
|
|
hash = ip_vs_rs_hashkey(dest->addr, dest->port);
|
|
list_add(&dest->d_list, &ip_vs_rtable[hash]);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* UNhashes ip_vs_dest from ip_vs_rtable.
|
|
* should be called with locked tables.
|
|
*/
|
|
static int ip_vs_rs_unhash(struct ip_vs_dest *dest)
|
|
{
|
|
/*
|
|
* Remove it from the ip_vs_rtable table.
|
|
*/
|
|
if (!list_empty(&dest->d_list)) {
|
|
list_del(&dest->d_list);
|
|
INIT_LIST_HEAD(&dest->d_list);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Lookup real service by <proto,addr,port> in the real service table.
|
|
*/
|
|
struct ip_vs_dest *
|
|
ip_vs_lookup_real_service(__u16 protocol, __u32 daddr, __u16 dport)
|
|
{
|
|
unsigned hash;
|
|
struct ip_vs_dest *dest;
|
|
|
|
/*
|
|
* Check for "full" addressed entries
|
|
* Return the first found entry
|
|
*/
|
|
hash = ip_vs_rs_hashkey(daddr, dport);
|
|
|
|
read_lock(&__ip_vs_rs_lock);
|
|
list_for_each_entry(dest, &ip_vs_rtable[hash], d_list) {
|
|
if ((dest->addr == daddr)
|
|
&& (dest->port == dport)
|
|
&& ((dest->protocol == protocol) ||
|
|
dest->vfwmark)) {
|
|
/* HIT */
|
|
read_unlock(&__ip_vs_rs_lock);
|
|
return dest;
|
|
}
|
|
}
|
|
read_unlock(&__ip_vs_rs_lock);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Lookup destination by {addr,port} in the given service
|
|
*/
|
|
static struct ip_vs_dest *
|
|
ip_vs_lookup_dest(struct ip_vs_service *svc, __u32 daddr, __u16 dport)
|
|
{
|
|
struct ip_vs_dest *dest;
|
|
|
|
/*
|
|
* Find the destination for the given service
|
|
*/
|
|
list_for_each_entry(dest, &svc->destinations, n_list) {
|
|
if ((dest->addr == daddr) && (dest->port == dport)) {
|
|
/* HIT */
|
|
return dest;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/*
|
|
* Lookup dest by {svc,addr,port} in the destination trash.
|
|
* The destination trash is used to hold the destinations that are removed
|
|
* from the service table but are still referenced by some conn entries.
|
|
* The reason to add the destination trash is when the dest is temporary
|
|
* down (either by administrator or by monitor program), the dest can be
|
|
* picked back from the trash, the remaining connections to the dest can
|
|
* continue, and the counting information of the dest is also useful for
|
|
* scheduling.
|
|
*/
|
|
static struct ip_vs_dest *
|
|
ip_vs_trash_get_dest(struct ip_vs_service *svc, __u32 daddr, __u16 dport)
|
|
{
|
|
struct ip_vs_dest *dest, *nxt;
|
|
|
|
/*
|
|
* Find the destination in trash
|
|
*/
|
|
list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) {
|
|
IP_VS_DBG(3, "Destination %u/%u.%u.%u.%u:%u still in trash, "
|
|
"dest->refcnt=%d\n",
|
|
dest->vfwmark,
|
|
NIPQUAD(dest->addr), ntohs(dest->port),
|
|
atomic_read(&dest->refcnt));
|
|
if (dest->addr == daddr &&
|
|
dest->port == dport &&
|
|
dest->vfwmark == svc->fwmark &&
|
|
dest->protocol == svc->protocol &&
|
|
(svc->fwmark ||
|
|
(dest->vaddr == svc->addr &&
|
|
dest->vport == svc->port))) {
|
|
/* HIT */
|
|
return dest;
|
|
}
|
|
|
|
/*
|
|
* Try to purge the destination from trash if not referenced
|
|
*/
|
|
if (atomic_read(&dest->refcnt) == 1) {
|
|
IP_VS_DBG(3, "Removing destination %u/%u.%u.%u.%u:%u "
|
|
"from trash\n",
|
|
dest->vfwmark,
|
|
NIPQUAD(dest->addr), ntohs(dest->port));
|
|
list_del(&dest->n_list);
|
|
ip_vs_dst_reset(dest);
|
|
__ip_vs_unbind_svc(dest);
|
|
kfree(dest);
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/*
|
|
* Clean up all the destinations in the trash
|
|
* Called by the ip_vs_control_cleanup()
|
|
*
|
|
* When the ip_vs_control_clearup is activated by ipvs module exit,
|
|
* the service tables must have been flushed and all the connections
|
|
* are expired, and the refcnt of each destination in the trash must
|
|
* be 1, so we simply release them here.
|
|
*/
|
|
static void ip_vs_trash_cleanup(void)
|
|
{
|
|
struct ip_vs_dest *dest, *nxt;
|
|
|
|
list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) {
|
|
list_del(&dest->n_list);
|
|
ip_vs_dst_reset(dest);
|
|
__ip_vs_unbind_svc(dest);
|
|
kfree(dest);
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
ip_vs_zero_stats(struct ip_vs_stats *stats)
|
|
{
|
|
spin_lock_bh(&stats->lock);
|
|
memset(stats, 0, (char *)&stats->lock - (char *)stats);
|
|
spin_unlock_bh(&stats->lock);
|
|
ip_vs_zero_estimator(stats);
|
|
}
|
|
|
|
/*
|
|
* Update a destination in the given service
|
|
*/
|
|
static void
|
|
__ip_vs_update_dest(struct ip_vs_service *svc,
|
|
struct ip_vs_dest *dest, struct ip_vs_dest_user *udest)
|
|
{
|
|
int conn_flags;
|
|
|
|
/* set the weight and the flags */
|
|
atomic_set(&dest->weight, udest->weight);
|
|
conn_flags = udest->conn_flags | IP_VS_CONN_F_INACTIVE;
|
|
|
|
/* check if local node and update the flags */
|
|
if (inet_addr_type(udest->addr) == RTN_LOCAL) {
|
|
conn_flags = (conn_flags & ~IP_VS_CONN_F_FWD_MASK)
|
|
| IP_VS_CONN_F_LOCALNODE;
|
|
}
|
|
|
|
/* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */
|
|
if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != 0) {
|
|
conn_flags |= IP_VS_CONN_F_NOOUTPUT;
|
|
} else {
|
|
/*
|
|
* Put the real service in ip_vs_rtable if not present.
|
|
* For now only for NAT!
|
|
*/
|
|
write_lock_bh(&__ip_vs_rs_lock);
|
|
ip_vs_rs_hash(dest);
|
|
write_unlock_bh(&__ip_vs_rs_lock);
|
|
}
|
|
atomic_set(&dest->conn_flags, conn_flags);
|
|
|
|
/* bind the service */
|
|
if (!dest->svc) {
|
|
__ip_vs_bind_svc(dest, svc);
|
|
} else {
|
|
if (dest->svc != svc) {
|
|
__ip_vs_unbind_svc(dest);
|
|
ip_vs_zero_stats(&dest->stats);
|
|
__ip_vs_bind_svc(dest, svc);
|
|
}
|
|
}
|
|
|
|
/* set the dest status flags */
|
|
dest->flags |= IP_VS_DEST_F_AVAILABLE;
|
|
|
|
if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold)
|
|
dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
|
|
dest->u_threshold = udest->u_threshold;
|
|
dest->l_threshold = udest->l_threshold;
|
|
}
|
|
|
|
|
|
/*
|
|
* Create a destination for the given service
|
|
*/
|
|
static int
|
|
ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user *udest,
|
|
struct ip_vs_dest **dest_p)
|
|
{
|
|
struct ip_vs_dest *dest;
|
|
unsigned atype;
|
|
|
|
EnterFunction(2);
|
|
|
|
atype = inet_addr_type(udest->addr);
|
|
if (atype != RTN_LOCAL && atype != RTN_UNICAST)
|
|
return -EINVAL;
|
|
|
|
dest = kmalloc(sizeof(struct ip_vs_dest), GFP_ATOMIC);
|
|
if (dest == NULL) {
|
|
IP_VS_ERR("ip_vs_new_dest: kmalloc failed.\n");
|
|
return -ENOMEM;
|
|
}
|
|
memset(dest, 0, sizeof(struct ip_vs_dest));
|
|
|
|
dest->protocol = svc->protocol;
|
|
dest->vaddr = svc->addr;
|
|
dest->vport = svc->port;
|
|
dest->vfwmark = svc->fwmark;
|
|
dest->addr = udest->addr;
|
|
dest->port = udest->port;
|
|
|
|
atomic_set(&dest->activeconns, 0);
|
|
atomic_set(&dest->inactconns, 0);
|
|
atomic_set(&dest->persistconns, 0);
|
|
atomic_set(&dest->refcnt, 0);
|
|
|
|
INIT_LIST_HEAD(&dest->d_list);
|
|
spin_lock_init(&dest->dst_lock);
|
|
spin_lock_init(&dest->stats.lock);
|
|
__ip_vs_update_dest(svc, dest, udest);
|
|
ip_vs_new_estimator(&dest->stats);
|
|
|
|
*dest_p = dest;
|
|
|
|
LeaveFunction(2);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Add a destination into an existing service
|
|
*/
|
|
static int
|
|
ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user *udest)
|
|
{
|
|
struct ip_vs_dest *dest;
|
|
__u32 daddr = udest->addr;
|
|
__u16 dport = udest->port;
|
|
int ret;
|
|
|
|
EnterFunction(2);
|
|
|
|
if (udest->weight < 0) {
|
|
IP_VS_ERR("ip_vs_add_dest(): server weight less than zero\n");
|
|
return -ERANGE;
|
|
}
|
|
|
|
if (udest->l_threshold > udest->u_threshold) {
|
|
IP_VS_ERR("ip_vs_add_dest(): lower threshold is higher than "
|
|
"upper threshold\n");
|
|
return -ERANGE;
|
|
}
|
|
|
|
/*
|
|
* Check if the dest already exists in the list
|
|
*/
|
|
dest = ip_vs_lookup_dest(svc, daddr, dport);
|
|
if (dest != NULL) {
|
|
IP_VS_DBG(1, "ip_vs_add_dest(): dest already exists\n");
|
|
return -EEXIST;
|
|
}
|
|
|
|
/*
|
|
* Check if the dest already exists in the trash and
|
|
* is from the same service
|
|
*/
|
|
dest = ip_vs_trash_get_dest(svc, daddr, dport);
|
|
if (dest != NULL) {
|
|
IP_VS_DBG(3, "Get destination %u.%u.%u.%u:%u from trash, "
|
|
"dest->refcnt=%d, service %u/%u.%u.%u.%u:%u\n",
|
|
NIPQUAD(daddr), ntohs(dport),
|
|
atomic_read(&dest->refcnt),
|
|
dest->vfwmark,
|
|
NIPQUAD(dest->vaddr),
|
|
ntohs(dest->vport));
|
|
__ip_vs_update_dest(svc, dest, udest);
|
|
|
|
/*
|
|
* Get the destination from the trash
|
|
*/
|
|
list_del(&dest->n_list);
|
|
|
|
ip_vs_new_estimator(&dest->stats);
|
|
|
|
write_lock_bh(&__ip_vs_svc_lock);
|
|
|
|
/*
|
|
* Wait until all other svc users go away.
|
|
*/
|
|
IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
|
|
|
|
list_add(&dest->n_list, &svc->destinations);
|
|
svc->num_dests++;
|
|
|
|
/* call the update_service function of its scheduler */
|
|
svc->scheduler->update_service(svc);
|
|
|
|
write_unlock_bh(&__ip_vs_svc_lock);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Allocate and initialize the dest structure
|
|
*/
|
|
ret = ip_vs_new_dest(svc, udest, &dest);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Add the dest entry into the list
|
|
*/
|
|
atomic_inc(&dest->refcnt);
|
|
|
|
write_lock_bh(&__ip_vs_svc_lock);
|
|
|
|
/*
|
|
* Wait until all other svc users go away.
|
|
*/
|
|
IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
|
|
|
|
list_add(&dest->n_list, &svc->destinations);
|
|
svc->num_dests++;
|
|
|
|
/* call the update_service function of its scheduler */
|
|
svc->scheduler->update_service(svc);
|
|
|
|
write_unlock_bh(&__ip_vs_svc_lock);
|
|
|
|
LeaveFunction(2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Edit a destination in the given service
|
|
*/
|
|
static int
|
|
ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user *udest)
|
|
{
|
|
struct ip_vs_dest *dest;
|
|
__u32 daddr = udest->addr;
|
|
__u16 dport = udest->port;
|
|
|
|
EnterFunction(2);
|
|
|
|
if (udest->weight < 0) {
|
|
IP_VS_ERR("ip_vs_edit_dest(): server weight less than zero\n");
|
|
return -ERANGE;
|
|
}
|
|
|
|
if (udest->l_threshold > udest->u_threshold) {
|
|
IP_VS_ERR("ip_vs_edit_dest(): lower threshold is higher than "
|
|
"upper threshold\n");
|
|
return -ERANGE;
|
|
}
|
|
|
|
/*
|
|
* Lookup the destination list
|
|
*/
|
|
dest = ip_vs_lookup_dest(svc, daddr, dport);
|
|
if (dest == NULL) {
|
|
IP_VS_DBG(1, "ip_vs_edit_dest(): dest doesn't exist\n");
|
|
return -ENOENT;
|
|
}
|
|
|
|
__ip_vs_update_dest(svc, dest, udest);
|
|
|
|
write_lock_bh(&__ip_vs_svc_lock);
|
|
|
|
/* Wait until all other svc users go away */
|
|
while (atomic_read(&svc->usecnt) > 1) {};
|
|
|
|
/* call the update_service, because server weight may be changed */
|
|
svc->scheduler->update_service(svc);
|
|
|
|
write_unlock_bh(&__ip_vs_svc_lock);
|
|
|
|
LeaveFunction(2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Delete a destination (must be already unlinked from the service)
|
|
*/
|
|
static void __ip_vs_del_dest(struct ip_vs_dest *dest)
|
|
{
|
|
ip_vs_kill_estimator(&dest->stats);
|
|
|
|
/*
|
|
* Remove it from the d-linked list with the real services.
|
|
*/
|
|
write_lock_bh(&__ip_vs_rs_lock);
|
|
ip_vs_rs_unhash(dest);
|
|
write_unlock_bh(&__ip_vs_rs_lock);
|
|
|
|
/*
|
|
* Decrease the refcnt of the dest, and free the dest
|
|
* if nobody refers to it (refcnt=0). Otherwise, throw
|
|
* the destination into the trash.
|
|
*/
|
|
if (atomic_dec_and_test(&dest->refcnt)) {
|
|
ip_vs_dst_reset(dest);
|
|
/* simply decrease svc->refcnt here, let the caller check
|
|
and release the service if nobody refers to it.
|
|
Only user context can release destination and service,
|
|
and only one user context can update virtual service at a
|
|
time, so the operation here is OK */
|
|
atomic_dec(&dest->svc->refcnt);
|
|
kfree(dest);
|
|
} else {
|
|
IP_VS_DBG(3, "Moving dest %u.%u.%u.%u:%u into trash, "
|
|
"dest->refcnt=%d\n",
|
|
NIPQUAD(dest->addr), ntohs(dest->port),
|
|
atomic_read(&dest->refcnt));
|
|
list_add(&dest->n_list, &ip_vs_dest_trash);
|
|
atomic_inc(&dest->refcnt);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Unlink a destination from the given service
|
|
*/
|
|
static void __ip_vs_unlink_dest(struct ip_vs_service *svc,
|
|
struct ip_vs_dest *dest,
|
|
int svcupd)
|
|
{
|
|
dest->flags &= ~IP_VS_DEST_F_AVAILABLE;
|
|
|
|
/*
|
|
* Remove it from the d-linked destination list.
|
|
*/
|
|
list_del(&dest->n_list);
|
|
svc->num_dests--;
|
|
if (svcupd) {
|
|
/*
|
|
* Call the update_service function of its scheduler
|
|
*/
|
|
svc->scheduler->update_service(svc);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Delete a destination server in the given service
|
|
*/
|
|
static int
|
|
ip_vs_del_dest(struct ip_vs_service *svc,struct ip_vs_dest_user *udest)
|
|
{
|
|
struct ip_vs_dest *dest;
|
|
__u32 daddr = udest->addr;
|
|
__u16 dport = udest->port;
|
|
|
|
EnterFunction(2);
|
|
|
|
dest = ip_vs_lookup_dest(svc, daddr, dport);
|
|
if (dest == NULL) {
|
|
IP_VS_DBG(1, "ip_vs_del_dest(): destination not found!\n");
|
|
return -ENOENT;
|
|
}
|
|
|
|
write_lock_bh(&__ip_vs_svc_lock);
|
|
|
|
/*
|
|
* Wait until all other svc users go away.
|
|
*/
|
|
IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
|
|
|
|
/*
|
|
* Unlink dest from the service
|
|
*/
|
|
__ip_vs_unlink_dest(svc, dest, 1);
|
|
|
|
write_unlock_bh(&__ip_vs_svc_lock);
|
|
|
|
/*
|
|
* Delete the destination
|
|
*/
|
|
__ip_vs_del_dest(dest);
|
|
|
|
LeaveFunction(2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Add a service into the service hash table
|
|
*/
|
|
static int
|
|
ip_vs_add_service(struct ip_vs_service_user *u, struct ip_vs_service **svc_p)
|
|
{
|
|
int ret = 0;
|
|
struct ip_vs_scheduler *sched = NULL;
|
|
struct ip_vs_service *svc = NULL;
|
|
|
|
/* increase the module use count */
|
|
ip_vs_use_count_inc();
|
|
|
|
/* Lookup the scheduler by 'u->sched_name' */
|
|
sched = ip_vs_scheduler_get(u->sched_name);
|
|
if (sched == NULL) {
|
|
IP_VS_INFO("Scheduler module ip_vs_%s not found\n",
|
|
u->sched_name);
|
|
ret = -ENOENT;
|
|
goto out_mod_dec;
|
|
}
|
|
|
|
svc = (struct ip_vs_service *)
|
|
kmalloc(sizeof(struct ip_vs_service), GFP_ATOMIC);
|
|
if (svc == NULL) {
|
|
IP_VS_DBG(1, "ip_vs_add_service: kmalloc failed.\n");
|
|
ret = -ENOMEM;
|
|
goto out_err;
|
|
}
|
|
memset(svc, 0, sizeof(struct ip_vs_service));
|
|
|
|
/* I'm the first user of the service */
|
|
atomic_set(&svc->usecnt, 1);
|
|
atomic_set(&svc->refcnt, 0);
|
|
|
|
svc->protocol = u->protocol;
|
|
svc->addr = u->addr;
|
|
svc->port = u->port;
|
|
svc->fwmark = u->fwmark;
|
|
svc->flags = u->flags;
|
|
svc->timeout = u->timeout * HZ;
|
|
svc->netmask = u->netmask;
|
|
|
|
INIT_LIST_HEAD(&svc->destinations);
|
|
rwlock_init(&svc->sched_lock);
|
|
spin_lock_init(&svc->stats.lock);
|
|
|
|
/* Bind the scheduler */
|
|
ret = ip_vs_bind_scheduler(svc, sched);
|
|
if (ret)
|
|
goto out_err;
|
|
sched = NULL;
|
|
|
|
/* Update the virtual service counters */
|
|
if (svc->port == FTPPORT)
|
|
atomic_inc(&ip_vs_ftpsvc_counter);
|
|
else if (svc->port == 0)
|
|
atomic_inc(&ip_vs_nullsvc_counter);
|
|
|
|
ip_vs_new_estimator(&svc->stats);
|
|
ip_vs_num_services++;
|
|
|
|
/* Hash the service into the service table */
|
|
write_lock_bh(&__ip_vs_svc_lock);
|
|
ip_vs_svc_hash(svc);
|
|
write_unlock_bh(&__ip_vs_svc_lock);
|
|
|
|
*svc_p = svc;
|
|
return 0;
|
|
|
|
out_err:
|
|
if (svc != NULL) {
|
|
if (svc->scheduler)
|
|
ip_vs_unbind_scheduler(svc);
|
|
if (svc->inc) {
|
|
local_bh_disable();
|
|
ip_vs_app_inc_put(svc->inc);
|
|
local_bh_enable();
|
|
}
|
|
kfree(svc);
|
|
}
|
|
ip_vs_scheduler_put(sched);
|
|
|
|
out_mod_dec:
|
|
/* decrease the module use count */
|
|
ip_vs_use_count_dec();
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* Edit a service and bind it with a new scheduler
|
|
*/
|
|
static int
|
|
ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user *u)
|
|
{
|
|
struct ip_vs_scheduler *sched, *old_sched;
|
|
int ret = 0;
|
|
|
|
/*
|
|
* Lookup the scheduler, by 'u->sched_name'
|
|
*/
|
|
sched = ip_vs_scheduler_get(u->sched_name);
|
|
if (sched == NULL) {
|
|
IP_VS_INFO("Scheduler module ip_vs_%s not found\n",
|
|
u->sched_name);
|
|
return -ENOENT;
|
|
}
|
|
old_sched = sched;
|
|
|
|
write_lock_bh(&__ip_vs_svc_lock);
|
|
|
|
/*
|
|
* Wait until all other svc users go away.
|
|
*/
|
|
IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
|
|
|
|
/*
|
|
* Set the flags and timeout value
|
|
*/
|
|
svc->flags = u->flags | IP_VS_SVC_F_HASHED;
|
|
svc->timeout = u->timeout * HZ;
|
|
svc->netmask = u->netmask;
|
|
|
|
old_sched = svc->scheduler;
|
|
if (sched != old_sched) {
|
|
/*
|
|
* Unbind the old scheduler
|
|
*/
|
|
if ((ret = ip_vs_unbind_scheduler(svc))) {
|
|
old_sched = sched;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Bind the new scheduler
|
|
*/
|
|
if ((ret = ip_vs_bind_scheduler(svc, sched))) {
|
|
/*
|
|
* If ip_vs_bind_scheduler fails, restore the old
|
|
* scheduler.
|
|
* The main reason of failure is out of memory.
|
|
*
|
|
* The question is if the old scheduler can be
|
|
* restored all the time. TODO: if it cannot be
|
|
* restored some time, we must delete the service,
|
|
* otherwise the system may crash.
|
|
*/
|
|
ip_vs_bind_scheduler(svc, old_sched);
|
|
old_sched = sched;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
out:
|
|
write_unlock_bh(&__ip_vs_svc_lock);
|
|
|
|
if (old_sched)
|
|
ip_vs_scheduler_put(old_sched);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* Delete a service from the service list
|
|
* - The service must be unlinked, unlocked and not referenced!
|
|
* - We are called under _bh lock
|
|
*/
|
|
static void __ip_vs_del_service(struct ip_vs_service *svc)
|
|
{
|
|
struct ip_vs_dest *dest, *nxt;
|
|
struct ip_vs_scheduler *old_sched;
|
|
|
|
ip_vs_num_services--;
|
|
ip_vs_kill_estimator(&svc->stats);
|
|
|
|
/* Unbind scheduler */
|
|
old_sched = svc->scheduler;
|
|
ip_vs_unbind_scheduler(svc);
|
|
if (old_sched)
|
|
ip_vs_scheduler_put(old_sched);
|
|
|
|
/* Unbind app inc */
|
|
if (svc->inc) {
|
|
ip_vs_app_inc_put(svc->inc);
|
|
svc->inc = NULL;
|
|
}
|
|
|
|
/*
|
|
* Unlink the whole destination list
|
|
*/
|
|
list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) {
|
|
__ip_vs_unlink_dest(svc, dest, 0);
|
|
__ip_vs_del_dest(dest);
|
|
}
|
|
|
|
/*
|
|
* Update the virtual service counters
|
|
*/
|
|
if (svc->port == FTPPORT)
|
|
atomic_dec(&ip_vs_ftpsvc_counter);
|
|
else if (svc->port == 0)
|
|
atomic_dec(&ip_vs_nullsvc_counter);
|
|
|
|
/*
|
|
* Free the service if nobody refers to it
|
|
*/
|
|
if (atomic_read(&svc->refcnt) == 0)
|
|
kfree(svc);
|
|
|
|
/* decrease the module use count */
|
|
ip_vs_use_count_dec();
|
|
}
|
|
|
|
/*
|
|
* Delete a service from the service list
|
|
*/
|
|
static int ip_vs_del_service(struct ip_vs_service *svc)
|
|
{
|
|
if (svc == NULL)
|
|
return -EEXIST;
|
|
|
|
/*
|
|
* Unhash it from the service table
|
|
*/
|
|
write_lock_bh(&__ip_vs_svc_lock);
|
|
|
|
ip_vs_svc_unhash(svc);
|
|
|
|
/*
|
|
* Wait until all the svc users go away.
|
|
*/
|
|
IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
|
|
|
|
__ip_vs_del_service(svc);
|
|
|
|
write_unlock_bh(&__ip_vs_svc_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Flush all the virtual services
|
|
*/
|
|
static int ip_vs_flush(void)
|
|
{
|
|
int idx;
|
|
struct ip_vs_service *svc, *nxt;
|
|
|
|
/*
|
|
* Flush the service table hashed by <protocol,addr,port>
|
|
*/
|
|
for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
|
|
list_for_each_entry_safe(svc, nxt, &ip_vs_svc_table[idx], s_list) {
|
|
write_lock_bh(&__ip_vs_svc_lock);
|
|
ip_vs_svc_unhash(svc);
|
|
/*
|
|
* Wait until all the svc users go away.
|
|
*/
|
|
IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0);
|
|
__ip_vs_del_service(svc);
|
|
write_unlock_bh(&__ip_vs_svc_lock);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Flush the service table hashed by fwmark
|
|
*/
|
|
for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
|
|
list_for_each_entry_safe(svc, nxt,
|
|
&ip_vs_svc_fwm_table[idx], f_list) {
|
|
write_lock_bh(&__ip_vs_svc_lock);
|
|
ip_vs_svc_unhash(svc);
|
|
/*
|
|
* Wait until all the svc users go away.
|
|
*/
|
|
IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0);
|
|
__ip_vs_del_service(svc);
|
|
write_unlock_bh(&__ip_vs_svc_lock);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Zero counters in a service or all services
|
|
*/
|
|
static int ip_vs_zero_service(struct ip_vs_service *svc)
|
|
{
|
|
struct ip_vs_dest *dest;
|
|
|
|
write_lock_bh(&__ip_vs_svc_lock);
|
|
list_for_each_entry(dest, &svc->destinations, n_list) {
|
|
ip_vs_zero_stats(&dest->stats);
|
|
}
|
|
ip_vs_zero_stats(&svc->stats);
|
|
write_unlock_bh(&__ip_vs_svc_lock);
|
|
return 0;
|
|
}
|
|
|
|
static int ip_vs_zero_all(void)
|
|
{
|
|
int idx;
|
|
struct ip_vs_service *svc;
|
|
|
|
for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
|
|
list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
|
|
ip_vs_zero_service(svc);
|
|
}
|
|
}
|
|
|
|
for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
|
|
list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
|
|
ip_vs_zero_service(svc);
|
|
}
|
|
}
|
|
|
|
ip_vs_zero_stats(&ip_vs_stats);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
proc_do_defense_mode(ctl_table *table, int write, struct file * filp,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
int *valp = table->data;
|
|
int val = *valp;
|
|
int rc;
|
|
|
|
rc = proc_dointvec(table, write, filp, buffer, lenp, ppos);
|
|
if (write && (*valp != val)) {
|
|
if ((*valp < 0) || (*valp > 3)) {
|
|
/* Restore the correct value */
|
|
*valp = val;
|
|
} else {
|
|
update_defense_level();
|
|
}
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
|
|
static int
|
|
proc_do_sync_threshold(ctl_table *table, int write, struct file *filp,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
int *valp = table->data;
|
|
int val[2];
|
|
int rc;
|
|
|
|
/* backup the value first */
|
|
memcpy(val, valp, sizeof(val));
|
|
|
|
rc = proc_dointvec(table, write, filp, buffer, lenp, ppos);
|
|
if (write && (valp[0] < 0 || valp[1] < 0 || valp[0] >= valp[1])) {
|
|
/* Restore the correct value */
|
|
memcpy(valp, val, sizeof(val));
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
|
|
/*
|
|
* IPVS sysctl table (under the /proc/sys/net/ipv4/vs/)
|
|
*/
|
|
|
|
static struct ctl_table vs_vars[] = {
|
|
{
|
|
.ctl_name = NET_IPV4_VS_AMEMTHRESH,
|
|
.procname = "amemthresh",
|
|
.data = &sysctl_ip_vs_amemthresh,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
#ifdef CONFIG_IP_VS_DEBUG
|
|
{
|
|
.ctl_name = NET_IPV4_VS_DEBUG_LEVEL,
|
|
.procname = "debug_level",
|
|
.data = &sysctl_ip_vs_debug_level,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
#endif
|
|
{
|
|
.ctl_name = NET_IPV4_VS_AMDROPRATE,
|
|
.procname = "am_droprate",
|
|
.data = &sysctl_ip_vs_am_droprate,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_VS_DROP_ENTRY,
|
|
.procname = "drop_entry",
|
|
.data = &sysctl_ip_vs_drop_entry,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_do_defense_mode,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_VS_DROP_PACKET,
|
|
.procname = "drop_packet",
|
|
.data = &sysctl_ip_vs_drop_packet,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_do_defense_mode,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_VS_SECURE_TCP,
|
|
.procname = "secure_tcp",
|
|
.data = &sysctl_ip_vs_secure_tcp,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_do_defense_mode,
|
|
},
|
|
#if 0
|
|
{
|
|
.ctl_name = NET_IPV4_VS_TO_ES,
|
|
.procname = "timeout_established",
|
|
.data = &vs_timeout_table_dos.timeout[IP_VS_S_ESTABLISHED],
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_VS_TO_SS,
|
|
.procname = "timeout_synsent",
|
|
.data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_SENT],
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_VS_TO_SR,
|
|
.procname = "timeout_synrecv",
|
|
.data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_RECV],
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_VS_TO_FW,
|
|
.procname = "timeout_finwait",
|
|
.data = &vs_timeout_table_dos.timeout[IP_VS_S_FIN_WAIT],
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_VS_TO_TW,
|
|
.procname = "timeout_timewait",
|
|
.data = &vs_timeout_table_dos.timeout[IP_VS_S_TIME_WAIT],
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_VS_TO_CL,
|
|
.procname = "timeout_close",
|
|
.data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE],
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_VS_TO_CW,
|
|
.procname = "timeout_closewait",
|
|
.data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE_WAIT],
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_VS_TO_LA,
|
|
.procname = "timeout_lastack",
|
|
.data = &vs_timeout_table_dos.timeout[IP_VS_S_LAST_ACK],
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_VS_TO_LI,
|
|
.procname = "timeout_listen",
|
|
.data = &vs_timeout_table_dos.timeout[IP_VS_S_LISTEN],
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_VS_TO_SA,
|
|
.procname = "timeout_synack",
|
|
.data = &vs_timeout_table_dos.timeout[IP_VS_S_SYNACK],
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_VS_TO_UDP,
|
|
.procname = "timeout_udp",
|
|
.data = &vs_timeout_table_dos.timeout[IP_VS_S_UDP],
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_VS_TO_ICMP,
|
|
.procname = "timeout_icmp",
|
|
.data = &vs_timeout_table_dos.timeout[IP_VS_S_ICMP],
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
#endif
|
|
{
|
|
.ctl_name = NET_IPV4_VS_CACHE_BYPASS,
|
|
.procname = "cache_bypass",
|
|
.data = &sysctl_ip_vs_cache_bypass,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_VS_EXPIRE_NODEST_CONN,
|
|
.procname = "expire_nodest_conn",
|
|
.data = &sysctl_ip_vs_expire_nodest_conn,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_VS_EXPIRE_QUIESCENT_TEMPLATE,
|
|
.procname = "expire_quiescent_template",
|
|
.data = &sysctl_ip_vs_expire_quiescent_template,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_VS_SYNC_THRESHOLD,
|
|
.procname = "sync_threshold",
|
|
.data = &sysctl_ip_vs_sync_threshold,
|
|
.maxlen = sizeof(sysctl_ip_vs_sync_threshold),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_do_sync_threshold,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_VS_NAT_ICMP_SEND,
|
|
.procname = "nat_icmp_send",
|
|
.data = &sysctl_ip_vs_nat_icmp_send,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{ .ctl_name = 0 }
|
|
};
|
|
|
|
static ctl_table vs_table[] = {
|
|
{
|
|
.ctl_name = NET_IPV4_VS,
|
|
.procname = "vs",
|
|
.mode = 0555,
|
|
.child = vs_vars
|
|
},
|
|
{ .ctl_name = 0 }
|
|
};
|
|
|
|
static ctl_table ipvs_ipv4_table[] = {
|
|
{
|
|
.ctl_name = NET_IPV4,
|
|
.procname = "ipv4",
|
|
.mode = 0555,
|
|
.child = vs_table,
|
|
},
|
|
{ .ctl_name = 0 }
|
|
};
|
|
|
|
static ctl_table vs_root_table[] = {
|
|
{
|
|
.ctl_name = CTL_NET,
|
|
.procname = "net",
|
|
.mode = 0555,
|
|
.child = ipvs_ipv4_table,
|
|
},
|
|
{ .ctl_name = 0 }
|
|
};
|
|
|
|
static struct ctl_table_header * sysctl_header;
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
|
|
struct ip_vs_iter {
|
|
struct list_head *table;
|
|
int bucket;
|
|
};
|
|
|
|
/*
|
|
* Write the contents of the VS rule table to a PROCfs file.
|
|
* (It is kept just for backward compatibility)
|
|
*/
|
|
static inline const char *ip_vs_fwd_name(unsigned flags)
|
|
{
|
|
switch (flags & IP_VS_CONN_F_FWD_MASK) {
|
|
case IP_VS_CONN_F_LOCALNODE:
|
|
return "Local";
|
|
case IP_VS_CONN_F_TUNNEL:
|
|
return "Tunnel";
|
|
case IP_VS_CONN_F_DROUTE:
|
|
return "Route";
|
|
default:
|
|
return "Masq";
|
|
}
|
|
}
|
|
|
|
|
|
/* Get the Nth entry in the two lists */
|
|
static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos)
|
|
{
|
|
struct ip_vs_iter *iter = seq->private;
|
|
int idx;
|
|
struct ip_vs_service *svc;
|
|
|
|
/* look in hash by protocol */
|
|
for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
|
|
list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
|
|
if (pos-- == 0){
|
|
iter->table = ip_vs_svc_table;
|
|
iter->bucket = idx;
|
|
return svc;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* keep looking in fwmark */
|
|
for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
|
|
list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
|
|
if (pos-- == 0) {
|
|
iter->table = ip_vs_svc_fwm_table;
|
|
iter->bucket = idx;
|
|
return svc;
|
|
}
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos)
|
|
{
|
|
|
|
read_lock_bh(&__ip_vs_svc_lock);
|
|
return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN;
|
|
}
|
|
|
|
|
|
static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
|
|
{
|
|
struct list_head *e;
|
|
struct ip_vs_iter *iter;
|
|
struct ip_vs_service *svc;
|
|
|
|
++*pos;
|
|
if (v == SEQ_START_TOKEN)
|
|
return ip_vs_info_array(seq,0);
|
|
|
|
svc = v;
|
|
iter = seq->private;
|
|
|
|
if (iter->table == ip_vs_svc_table) {
|
|
/* next service in table hashed by protocol */
|
|
if ((e = svc->s_list.next) != &ip_vs_svc_table[iter->bucket])
|
|
return list_entry(e, struct ip_vs_service, s_list);
|
|
|
|
|
|
while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
|
|
list_for_each_entry(svc,&ip_vs_svc_table[iter->bucket],
|
|
s_list) {
|
|
return svc;
|
|
}
|
|
}
|
|
|
|
iter->table = ip_vs_svc_fwm_table;
|
|
iter->bucket = -1;
|
|
goto scan_fwmark;
|
|
}
|
|
|
|
/* next service in hashed by fwmark */
|
|
if ((e = svc->f_list.next) != &ip_vs_svc_fwm_table[iter->bucket])
|
|
return list_entry(e, struct ip_vs_service, f_list);
|
|
|
|
scan_fwmark:
|
|
while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
|
|
list_for_each_entry(svc, &ip_vs_svc_fwm_table[iter->bucket],
|
|
f_list)
|
|
return svc;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void ip_vs_info_seq_stop(struct seq_file *seq, void *v)
|
|
{
|
|
read_unlock_bh(&__ip_vs_svc_lock);
|
|
}
|
|
|
|
|
|
static int ip_vs_info_seq_show(struct seq_file *seq, void *v)
|
|
{
|
|
if (v == SEQ_START_TOKEN) {
|
|
seq_printf(seq,
|
|
"IP Virtual Server version %d.%d.%d (size=%d)\n",
|
|
NVERSION(IP_VS_VERSION_CODE), IP_VS_CONN_TAB_SIZE);
|
|
seq_puts(seq,
|
|
"Prot LocalAddress:Port Scheduler Flags\n");
|
|
seq_puts(seq,
|
|
" -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
|
|
} else {
|
|
const struct ip_vs_service *svc = v;
|
|
const struct ip_vs_iter *iter = seq->private;
|
|
const struct ip_vs_dest *dest;
|
|
|
|
if (iter->table == ip_vs_svc_table)
|
|
seq_printf(seq, "%s %08X:%04X %s ",
|
|
ip_vs_proto_name(svc->protocol),
|
|
ntohl(svc->addr),
|
|
ntohs(svc->port),
|
|
svc->scheduler->name);
|
|
else
|
|
seq_printf(seq, "FWM %08X %s ",
|
|
svc->fwmark, svc->scheduler->name);
|
|
|
|
if (svc->flags & IP_VS_SVC_F_PERSISTENT)
|
|
seq_printf(seq, "persistent %d %08X\n",
|
|
svc->timeout,
|
|
ntohl(svc->netmask));
|
|
else
|
|
seq_putc(seq, '\n');
|
|
|
|
list_for_each_entry(dest, &svc->destinations, n_list) {
|
|
seq_printf(seq,
|
|
" -> %08X:%04X %-7s %-6d %-10d %-10d\n",
|
|
ntohl(dest->addr), ntohs(dest->port),
|
|
ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
|
|
atomic_read(&dest->weight),
|
|
atomic_read(&dest->activeconns),
|
|
atomic_read(&dest->inactconns));
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct seq_operations ip_vs_info_seq_ops = {
|
|
.start = ip_vs_info_seq_start,
|
|
.next = ip_vs_info_seq_next,
|
|
.stop = ip_vs_info_seq_stop,
|
|
.show = ip_vs_info_seq_show,
|
|
};
|
|
|
|
static int ip_vs_info_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct seq_file *seq;
|
|
int rc = -ENOMEM;
|
|
struct ip_vs_iter *s = kmalloc(sizeof(*s), GFP_KERNEL);
|
|
|
|
if (!s)
|
|
goto out;
|
|
|
|
rc = seq_open(file, &ip_vs_info_seq_ops);
|
|
if (rc)
|
|
goto out_kfree;
|
|
|
|
seq = file->private_data;
|
|
seq->private = s;
|
|
memset(s, 0, sizeof(*s));
|
|
out:
|
|
return rc;
|
|
out_kfree:
|
|
kfree(s);
|
|
goto out;
|
|
}
|
|
|
|
static struct file_operations ip_vs_info_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = ip_vs_info_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = seq_release_private,
|
|
};
|
|
|
|
#endif
|
|
|
|
struct ip_vs_stats ip_vs_stats;
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
static int ip_vs_stats_show(struct seq_file *seq, void *v)
|
|
{
|
|
|
|
/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
|
|
seq_puts(seq,
|
|
" Total Incoming Outgoing Incoming Outgoing\n");
|
|
seq_printf(seq,
|
|
" Conns Packets Packets Bytes Bytes\n");
|
|
|
|
spin_lock_bh(&ip_vs_stats.lock);
|
|
seq_printf(seq, "%8X %8X %8X %16LX %16LX\n\n", ip_vs_stats.conns,
|
|
ip_vs_stats.inpkts, ip_vs_stats.outpkts,
|
|
(unsigned long long) ip_vs_stats.inbytes,
|
|
(unsigned long long) ip_vs_stats.outbytes);
|
|
|
|
/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
|
|
seq_puts(seq,
|
|
" Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
|
|
seq_printf(seq,"%8X %8X %8X %16X %16X\n",
|
|
ip_vs_stats.cps,
|
|
ip_vs_stats.inpps,
|
|
ip_vs_stats.outpps,
|
|
ip_vs_stats.inbps,
|
|
ip_vs_stats.outbps);
|
|
spin_unlock_bh(&ip_vs_stats.lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ip_vs_stats_seq_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, ip_vs_stats_show, NULL);
|
|
}
|
|
|
|
static struct file_operations ip_vs_stats_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = ip_vs_stats_seq_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
#endif
|
|
|
|
/*
|
|
* Set timeout values for tcp tcpfin udp in the timeout_table.
|
|
*/
|
|
static int ip_vs_set_timeout(struct ip_vs_timeout_user *u)
|
|
{
|
|
IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
|
|
u->tcp_timeout,
|
|
u->tcp_fin_timeout,
|
|
u->udp_timeout);
|
|
|
|
#ifdef CONFIG_IP_VS_PROTO_TCP
|
|
if (u->tcp_timeout) {
|
|
ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED]
|
|
= u->tcp_timeout * HZ;
|
|
}
|
|
|
|
if (u->tcp_fin_timeout) {
|
|
ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT]
|
|
= u->tcp_fin_timeout * HZ;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_IP_VS_PROTO_UDP
|
|
if (u->udp_timeout) {
|
|
ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL]
|
|
= u->udp_timeout * HZ;
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
|
|
#define SET_CMDID(cmd) (cmd - IP_VS_BASE_CTL)
|
|
#define SERVICE_ARG_LEN (sizeof(struct ip_vs_service_user))
|
|
#define SVCDEST_ARG_LEN (sizeof(struct ip_vs_service_user) + \
|
|
sizeof(struct ip_vs_dest_user))
|
|
#define TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user))
|
|
#define DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user))
|
|
#define MAX_ARG_LEN SVCDEST_ARG_LEN
|
|
|
|
static const unsigned char set_arglen[SET_CMDID(IP_VS_SO_SET_MAX)+1] = {
|
|
[SET_CMDID(IP_VS_SO_SET_ADD)] = SERVICE_ARG_LEN,
|
|
[SET_CMDID(IP_VS_SO_SET_EDIT)] = SERVICE_ARG_LEN,
|
|
[SET_CMDID(IP_VS_SO_SET_DEL)] = SERVICE_ARG_LEN,
|
|
[SET_CMDID(IP_VS_SO_SET_FLUSH)] = 0,
|
|
[SET_CMDID(IP_VS_SO_SET_ADDDEST)] = SVCDEST_ARG_LEN,
|
|
[SET_CMDID(IP_VS_SO_SET_DELDEST)] = SVCDEST_ARG_LEN,
|
|
[SET_CMDID(IP_VS_SO_SET_EDITDEST)] = SVCDEST_ARG_LEN,
|
|
[SET_CMDID(IP_VS_SO_SET_TIMEOUT)] = TIMEOUT_ARG_LEN,
|
|
[SET_CMDID(IP_VS_SO_SET_STARTDAEMON)] = DAEMON_ARG_LEN,
|
|
[SET_CMDID(IP_VS_SO_SET_STOPDAEMON)] = DAEMON_ARG_LEN,
|
|
[SET_CMDID(IP_VS_SO_SET_ZERO)] = SERVICE_ARG_LEN,
|
|
};
|
|
|
|
static int
|
|
do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
|
|
{
|
|
int ret;
|
|
unsigned char arg[MAX_ARG_LEN];
|
|
struct ip_vs_service_user *usvc;
|
|
struct ip_vs_service *svc;
|
|
struct ip_vs_dest_user *udest;
|
|
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (len != set_arglen[SET_CMDID(cmd)]) {
|
|
IP_VS_ERR("set_ctl: len %u != %u\n",
|
|
len, set_arglen[SET_CMDID(cmd)]);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (copy_from_user(arg, user, len) != 0)
|
|
return -EFAULT;
|
|
|
|
/* increase the module use count */
|
|
ip_vs_use_count_inc();
|
|
|
|
if (mutex_lock_interruptible(&__ip_vs_mutex)) {
|
|
ret = -ERESTARTSYS;
|
|
goto out_dec;
|
|
}
|
|
|
|
if (cmd == IP_VS_SO_SET_FLUSH) {
|
|
/* Flush the virtual service */
|
|
ret = ip_vs_flush();
|
|
goto out_unlock;
|
|
} else if (cmd == IP_VS_SO_SET_TIMEOUT) {
|
|
/* Set timeout values for (tcp tcpfin udp) */
|
|
ret = ip_vs_set_timeout((struct ip_vs_timeout_user *)arg);
|
|
goto out_unlock;
|
|
} else if (cmd == IP_VS_SO_SET_STARTDAEMON) {
|
|
struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
|
|
ret = start_sync_thread(dm->state, dm->mcast_ifn, dm->syncid);
|
|
goto out_unlock;
|
|
} else if (cmd == IP_VS_SO_SET_STOPDAEMON) {
|
|
struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
|
|
ret = stop_sync_thread(dm->state);
|
|
goto out_unlock;
|
|
}
|
|
|
|
usvc = (struct ip_vs_service_user *)arg;
|
|
udest = (struct ip_vs_dest_user *)(usvc + 1);
|
|
|
|
if (cmd == IP_VS_SO_SET_ZERO) {
|
|
/* if no service address is set, zero counters in all */
|
|
if (!usvc->fwmark && !usvc->addr && !usvc->port) {
|
|
ret = ip_vs_zero_all();
|
|
goto out_unlock;
|
|
}
|
|
}
|
|
|
|
/* Check for valid protocol: TCP or UDP, even for fwmark!=0 */
|
|
if (usvc->protocol!=IPPROTO_TCP && usvc->protocol!=IPPROTO_UDP) {
|
|
IP_VS_ERR("set_ctl: invalid protocol: %d %d.%d.%d.%d:%d %s\n",
|
|
usvc->protocol, NIPQUAD(usvc->addr),
|
|
ntohs(usvc->port), usvc->sched_name);
|
|
ret = -EFAULT;
|
|
goto out_unlock;
|
|
}
|
|
|
|
/* Lookup the exact service by <protocol, addr, port> or fwmark */
|
|
if (usvc->fwmark == 0)
|
|
svc = __ip_vs_service_get(usvc->protocol,
|
|
usvc->addr, usvc->port);
|
|
else
|
|
svc = __ip_vs_svc_fwm_get(usvc->fwmark);
|
|
|
|
if (cmd != IP_VS_SO_SET_ADD
|
|
&& (svc == NULL || svc->protocol != usvc->protocol)) {
|
|
ret = -ESRCH;
|
|
goto out_unlock;
|
|
}
|
|
|
|
switch (cmd) {
|
|
case IP_VS_SO_SET_ADD:
|
|
if (svc != NULL)
|
|
ret = -EEXIST;
|
|
else
|
|
ret = ip_vs_add_service(usvc, &svc);
|
|
break;
|
|
case IP_VS_SO_SET_EDIT:
|
|
ret = ip_vs_edit_service(svc, usvc);
|
|
break;
|
|
case IP_VS_SO_SET_DEL:
|
|
ret = ip_vs_del_service(svc);
|
|
if (!ret)
|
|
goto out_unlock;
|
|
break;
|
|
case IP_VS_SO_SET_ZERO:
|
|
ret = ip_vs_zero_service(svc);
|
|
break;
|
|
case IP_VS_SO_SET_ADDDEST:
|
|
ret = ip_vs_add_dest(svc, udest);
|
|
break;
|
|
case IP_VS_SO_SET_EDITDEST:
|
|
ret = ip_vs_edit_dest(svc, udest);
|
|
break;
|
|
case IP_VS_SO_SET_DELDEST:
|
|
ret = ip_vs_del_dest(svc, udest);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
if (svc)
|
|
ip_vs_service_put(svc);
|
|
|
|
out_unlock:
|
|
mutex_unlock(&__ip_vs_mutex);
|
|
out_dec:
|
|
/* decrease the module use count */
|
|
ip_vs_use_count_dec();
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static void
|
|
ip_vs_copy_stats(struct ip_vs_stats_user *dst, struct ip_vs_stats *src)
|
|
{
|
|
spin_lock_bh(&src->lock);
|
|
memcpy(dst, src, (char*)&src->lock - (char*)src);
|
|
spin_unlock_bh(&src->lock);
|
|
}
|
|
|
|
static void
|
|
ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src)
|
|
{
|
|
dst->protocol = src->protocol;
|
|
dst->addr = src->addr;
|
|
dst->port = src->port;
|
|
dst->fwmark = src->fwmark;
|
|
strlcpy(dst->sched_name, src->scheduler->name, sizeof(dst->sched_name));
|
|
dst->flags = src->flags;
|
|
dst->timeout = src->timeout / HZ;
|
|
dst->netmask = src->netmask;
|
|
dst->num_dests = src->num_dests;
|
|
ip_vs_copy_stats(&dst->stats, &src->stats);
|
|
}
|
|
|
|
static inline int
|
|
__ip_vs_get_service_entries(const struct ip_vs_get_services *get,
|
|
struct ip_vs_get_services __user *uptr)
|
|
{
|
|
int idx, count=0;
|
|
struct ip_vs_service *svc;
|
|
struct ip_vs_service_entry entry;
|
|
int ret = 0;
|
|
|
|
for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
|
|
list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
|
|
if (count >= get->num_services)
|
|
goto out;
|
|
memset(&entry, 0, sizeof(entry));
|
|
ip_vs_copy_service(&entry, svc);
|
|
if (copy_to_user(&uptr->entrytable[count],
|
|
&entry, sizeof(entry))) {
|
|
ret = -EFAULT;
|
|
goto out;
|
|
}
|
|
count++;
|
|
}
|
|
}
|
|
|
|
for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
|
|
list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
|
|
if (count >= get->num_services)
|
|
goto out;
|
|
memset(&entry, 0, sizeof(entry));
|
|
ip_vs_copy_service(&entry, svc);
|
|
if (copy_to_user(&uptr->entrytable[count],
|
|
&entry, sizeof(entry))) {
|
|
ret = -EFAULT;
|
|
goto out;
|
|
}
|
|
count++;
|
|
}
|
|
}
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static inline int
|
|
__ip_vs_get_dest_entries(const struct ip_vs_get_dests *get,
|
|
struct ip_vs_get_dests __user *uptr)
|
|
{
|
|
struct ip_vs_service *svc;
|
|
int ret = 0;
|
|
|
|
if (get->fwmark)
|
|
svc = __ip_vs_svc_fwm_get(get->fwmark);
|
|
else
|
|
svc = __ip_vs_service_get(get->protocol,
|
|
get->addr, get->port);
|
|
if (svc) {
|
|
int count = 0;
|
|
struct ip_vs_dest *dest;
|
|
struct ip_vs_dest_entry entry;
|
|
|
|
list_for_each_entry(dest, &svc->destinations, n_list) {
|
|
if (count >= get->num_dests)
|
|
break;
|
|
|
|
entry.addr = dest->addr;
|
|
entry.port = dest->port;
|
|
entry.conn_flags = atomic_read(&dest->conn_flags);
|
|
entry.weight = atomic_read(&dest->weight);
|
|
entry.u_threshold = dest->u_threshold;
|
|
entry.l_threshold = dest->l_threshold;
|
|
entry.activeconns = atomic_read(&dest->activeconns);
|
|
entry.inactconns = atomic_read(&dest->inactconns);
|
|
entry.persistconns = atomic_read(&dest->persistconns);
|
|
ip_vs_copy_stats(&entry.stats, &dest->stats);
|
|
if (copy_to_user(&uptr->entrytable[count],
|
|
&entry, sizeof(entry))) {
|
|
ret = -EFAULT;
|
|
break;
|
|
}
|
|
count++;
|
|
}
|
|
ip_vs_service_put(svc);
|
|
} else
|
|
ret = -ESRCH;
|
|
return ret;
|
|
}
|
|
|
|
static inline void
|
|
__ip_vs_get_timeouts(struct ip_vs_timeout_user *u)
|
|
{
|
|
#ifdef CONFIG_IP_VS_PROTO_TCP
|
|
u->tcp_timeout =
|
|
ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ;
|
|
u->tcp_fin_timeout =
|
|
ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ;
|
|
#endif
|
|
#ifdef CONFIG_IP_VS_PROTO_UDP
|
|
u->udp_timeout =
|
|
ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL] / HZ;
|
|
#endif
|
|
}
|
|
|
|
|
|
#define GET_CMDID(cmd) (cmd - IP_VS_BASE_CTL)
|
|
#define GET_INFO_ARG_LEN (sizeof(struct ip_vs_getinfo))
|
|
#define GET_SERVICES_ARG_LEN (sizeof(struct ip_vs_get_services))
|
|
#define GET_SERVICE_ARG_LEN (sizeof(struct ip_vs_service_entry))
|
|
#define GET_DESTS_ARG_LEN (sizeof(struct ip_vs_get_dests))
|
|
#define GET_TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user))
|
|
#define GET_DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user) * 2)
|
|
|
|
static const unsigned char get_arglen[GET_CMDID(IP_VS_SO_GET_MAX)+1] = {
|
|
[GET_CMDID(IP_VS_SO_GET_VERSION)] = 64,
|
|
[GET_CMDID(IP_VS_SO_GET_INFO)] = GET_INFO_ARG_LEN,
|
|
[GET_CMDID(IP_VS_SO_GET_SERVICES)] = GET_SERVICES_ARG_LEN,
|
|
[GET_CMDID(IP_VS_SO_GET_SERVICE)] = GET_SERVICE_ARG_LEN,
|
|
[GET_CMDID(IP_VS_SO_GET_DESTS)] = GET_DESTS_ARG_LEN,
|
|
[GET_CMDID(IP_VS_SO_GET_TIMEOUT)] = GET_TIMEOUT_ARG_LEN,
|
|
[GET_CMDID(IP_VS_SO_GET_DAEMON)] = GET_DAEMON_ARG_LEN,
|
|
};
|
|
|
|
static int
|
|
do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
|
|
{
|
|
unsigned char arg[128];
|
|
int ret = 0;
|
|
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (*len < get_arglen[GET_CMDID(cmd)]) {
|
|
IP_VS_ERR("get_ctl: len %u < %u\n",
|
|
*len, get_arglen[GET_CMDID(cmd)]);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (copy_from_user(arg, user, get_arglen[GET_CMDID(cmd)]) != 0)
|
|
return -EFAULT;
|
|
|
|
if (mutex_lock_interruptible(&__ip_vs_mutex))
|
|
return -ERESTARTSYS;
|
|
|
|
switch (cmd) {
|
|
case IP_VS_SO_GET_VERSION:
|
|
{
|
|
char buf[64];
|
|
|
|
sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)",
|
|
NVERSION(IP_VS_VERSION_CODE), IP_VS_CONN_TAB_SIZE);
|
|
if (copy_to_user(user, buf, strlen(buf)+1) != 0) {
|
|
ret = -EFAULT;
|
|
goto out;
|
|
}
|
|
*len = strlen(buf)+1;
|
|
}
|
|
break;
|
|
|
|
case IP_VS_SO_GET_INFO:
|
|
{
|
|
struct ip_vs_getinfo info;
|
|
info.version = IP_VS_VERSION_CODE;
|
|
info.size = IP_VS_CONN_TAB_SIZE;
|
|
info.num_services = ip_vs_num_services;
|
|
if (copy_to_user(user, &info, sizeof(info)) != 0)
|
|
ret = -EFAULT;
|
|
}
|
|
break;
|
|
|
|
case IP_VS_SO_GET_SERVICES:
|
|
{
|
|
struct ip_vs_get_services *get;
|
|
int size;
|
|
|
|
get = (struct ip_vs_get_services *)arg;
|
|
size = sizeof(*get) +
|
|
sizeof(struct ip_vs_service_entry) * get->num_services;
|
|
if (*len != size) {
|
|
IP_VS_ERR("length: %u != %u\n", *len, size);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
ret = __ip_vs_get_service_entries(get, user);
|
|
}
|
|
break;
|
|
|
|
case IP_VS_SO_GET_SERVICE:
|
|
{
|
|
struct ip_vs_service_entry *entry;
|
|
struct ip_vs_service *svc;
|
|
|
|
entry = (struct ip_vs_service_entry *)arg;
|
|
if (entry->fwmark)
|
|
svc = __ip_vs_svc_fwm_get(entry->fwmark);
|
|
else
|
|
svc = __ip_vs_service_get(entry->protocol,
|
|
entry->addr, entry->port);
|
|
if (svc) {
|
|
ip_vs_copy_service(entry, svc);
|
|
if (copy_to_user(user, entry, sizeof(*entry)) != 0)
|
|
ret = -EFAULT;
|
|
ip_vs_service_put(svc);
|
|
} else
|
|
ret = -ESRCH;
|
|
}
|
|
break;
|
|
|
|
case IP_VS_SO_GET_DESTS:
|
|
{
|
|
struct ip_vs_get_dests *get;
|
|
int size;
|
|
|
|
get = (struct ip_vs_get_dests *)arg;
|
|
size = sizeof(*get) +
|
|
sizeof(struct ip_vs_dest_entry) * get->num_dests;
|
|
if (*len != size) {
|
|
IP_VS_ERR("length: %u != %u\n", *len, size);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
ret = __ip_vs_get_dest_entries(get, user);
|
|
}
|
|
break;
|
|
|
|
case IP_VS_SO_GET_TIMEOUT:
|
|
{
|
|
struct ip_vs_timeout_user t;
|
|
|
|
__ip_vs_get_timeouts(&t);
|
|
if (copy_to_user(user, &t, sizeof(t)) != 0)
|
|
ret = -EFAULT;
|
|
}
|
|
break;
|
|
|
|
case IP_VS_SO_GET_DAEMON:
|
|
{
|
|
struct ip_vs_daemon_user d[2];
|
|
|
|
memset(&d, 0, sizeof(d));
|
|
if (ip_vs_sync_state & IP_VS_STATE_MASTER) {
|
|
d[0].state = IP_VS_STATE_MASTER;
|
|
strlcpy(d[0].mcast_ifn, ip_vs_master_mcast_ifn, sizeof(d[0].mcast_ifn));
|
|
d[0].syncid = ip_vs_master_syncid;
|
|
}
|
|
if (ip_vs_sync_state & IP_VS_STATE_BACKUP) {
|
|
d[1].state = IP_VS_STATE_BACKUP;
|
|
strlcpy(d[1].mcast_ifn, ip_vs_backup_mcast_ifn, sizeof(d[1].mcast_ifn));
|
|
d[1].syncid = ip_vs_backup_syncid;
|
|
}
|
|
if (copy_to_user(user, &d, sizeof(d)) != 0)
|
|
ret = -EFAULT;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
out:
|
|
mutex_unlock(&__ip_vs_mutex);
|
|
return ret;
|
|
}
|
|
|
|
|
|
static struct nf_sockopt_ops ip_vs_sockopts = {
|
|
.pf = PF_INET,
|
|
.set_optmin = IP_VS_BASE_CTL,
|
|
.set_optmax = IP_VS_SO_SET_MAX+1,
|
|
.set = do_ip_vs_set_ctl,
|
|
.get_optmin = IP_VS_BASE_CTL,
|
|
.get_optmax = IP_VS_SO_GET_MAX+1,
|
|
.get = do_ip_vs_get_ctl,
|
|
};
|
|
|
|
|
|
int ip_vs_control_init(void)
|
|
{
|
|
int ret;
|
|
int idx;
|
|
|
|
EnterFunction(2);
|
|
|
|
ret = nf_register_sockopt(&ip_vs_sockopts);
|
|
if (ret) {
|
|
IP_VS_ERR("cannot register sockopt.\n");
|
|
return ret;
|
|
}
|
|
|
|
proc_net_fops_create("ip_vs", 0, &ip_vs_info_fops);
|
|
proc_net_fops_create("ip_vs_stats",0, &ip_vs_stats_fops);
|
|
|
|
sysctl_header = register_sysctl_table(vs_root_table, 0);
|
|
|
|
/* Initialize ip_vs_svc_table, ip_vs_svc_fwm_table, ip_vs_rtable */
|
|
for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
|
|
INIT_LIST_HEAD(&ip_vs_svc_table[idx]);
|
|
INIT_LIST_HEAD(&ip_vs_svc_fwm_table[idx]);
|
|
}
|
|
for(idx = 0; idx < IP_VS_RTAB_SIZE; idx++) {
|
|
INIT_LIST_HEAD(&ip_vs_rtable[idx]);
|
|
}
|
|
|
|
memset(&ip_vs_stats, 0, sizeof(ip_vs_stats));
|
|
spin_lock_init(&ip_vs_stats.lock);
|
|
ip_vs_new_estimator(&ip_vs_stats);
|
|
|
|
/* Hook the defense timer */
|
|
schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD);
|
|
|
|
LeaveFunction(2);
|
|
return 0;
|
|
}
|
|
|
|
|
|
void ip_vs_control_cleanup(void)
|
|
{
|
|
EnterFunction(2);
|
|
ip_vs_trash_cleanup();
|
|
cancel_rearming_delayed_work(&defense_work);
|
|
ip_vs_kill_estimator(&ip_vs_stats);
|
|
unregister_sysctl_table(sysctl_header);
|
|
proc_net_remove("ip_vs_stats");
|
|
proc_net_remove("ip_vs");
|
|
nf_unregister_sockopt(&ip_vs_sockopts);
|
|
LeaveFunction(2);
|
|
}
|