diff options
Diffstat (limited to 'net/ipv4/ipvs/ip_vs_ctl.c')
| -rw-r--r-- | net/ipv4/ipvs/ip_vs_ctl.c | 3441 |
1 files changed, 0 insertions, 3441 deletions
diff --git a/net/ipv4/ipvs/ip_vs_ctl.c b/net/ipv4/ipvs/ip_vs_ctl.c deleted file mode 100644 index 771551d8fba9..000000000000 --- a/net/ipv4/ipvs/ip_vs_ctl.c +++ /dev/null @@ -1,3441 +0,0 @@ -/* - * IPVS An implementation of the IP virtual server support for the - * LINUX operating system. IPVS is now implemented as a module - * over the NetFilter framework. IPVS can be used to build a - * high-performance and highly available server based on a - * cluster of servers. - * - * Authors: Wensong Zhang <wensong@linuxvirtualserver.org> - * Peter Kese <peter.kese@ijs.si> - * Julian Anastasov <ja@ssi.bg> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * - * Changes: - * - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/types.h> -#include <linux/capability.h> -#include <linux/fs.h> -#include <linux/sysctl.h> -#include <linux/proc_fs.h> -#include <linux/workqueue.h> -#include <linux/swap.h> -#include <linux/seq_file.h> - -#include <linux/netfilter.h> -#include <linux/netfilter_ipv4.h> -#include <linux/mutex.h> - -#include <net/net_namespace.h> -#include <net/ip.h> -#ifdef CONFIG_IP_VS_IPV6 -#include <net/ipv6.h> -#include <net/ip6_route.h> -#endif -#include <net/route.h> -#include <net/sock.h> -#include <net/genetlink.h> - -#include <asm/uaccess.h> - -#include <net/ip_vs.h> - -/* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */ -static DEFINE_MUTEX(__ip_vs_mutex); - -/* lock for service table */ -static DEFINE_RWLOCK(__ip_vs_svc_lock); - -/* lock for table with the real services */ -static DEFINE_RWLOCK(__ip_vs_rs_lock); - -/* lock for state and timeout tables */ -static DEFINE_RWLOCK(__ip_vs_securetcp_lock); - -/* lock for drop entry handling */ -static DEFINE_SPINLOCK(__ip_vs_dropentry_lock); - -/* lock for drop packet handling */ -static DEFINE_SPINLOCK(__ip_vs_droppacket_lock); - -/* 1/rate drop and drop-entry variables */ -int ip_vs_drop_rate = 0; -int ip_vs_drop_counter = 0; -static atomic_t ip_vs_dropentry = ATOMIC_INIT(0); - -/* number of virtual services */ -static int ip_vs_num_services = 0; - -/* sysctl variables */ -static int sysctl_ip_vs_drop_entry = 0; -static int sysctl_ip_vs_drop_packet = 0; -static int sysctl_ip_vs_secure_tcp = 0; -static int sysctl_ip_vs_amemthresh = 1024; -static int sysctl_ip_vs_am_droprate = 10; -int sysctl_ip_vs_cache_bypass = 0; -int sysctl_ip_vs_expire_nodest_conn = 0; -int sysctl_ip_vs_expire_quiescent_template = 0; -int sysctl_ip_vs_sync_threshold[2] = { 3, 50 }; -int sysctl_ip_vs_nat_icmp_send = 0; - - -#ifdef CONFIG_IP_VS_DEBUG -static int sysctl_ip_vs_debug_level = 0; - -int ip_vs_get_debug_level(void) -{ - return sysctl_ip_vs_debug_level; -} -#endif - -#ifdef CONFIG_IP_VS_IPV6 -/* Taken from rt6_fill_node() in net/ipv6/route.c, is there a better way? */ -static int __ip_vs_addr_is_local_v6(const struct in6_addr *addr) -{ - struct rt6_info *rt; - struct flowi fl = { - .oif = 0, - .nl_u = { - .ip6_u = { - .daddr = *addr, - .saddr = { .s6_addr32 = {0, 0, 0, 0} }, } }, - }; - - rt = (struct rt6_info *)ip6_route_output(&init_net, NULL, &fl); - if (rt && rt->rt6i_dev && (rt->rt6i_dev->flags & IFF_LOOPBACK)) - return 1; - - return 0; -} -#endif -/* - * update_defense_level is called from keventd and from sysctl, - * so it needs to protect itself from softirqs - */ -static void update_defense_level(void) -{ - struct sysinfo i; - static int old_secure_tcp = 0; - int availmem; - int nomem; - int to_change = -1; - - /* we only count free and buffered memory (in pages) */ - si_meminfo(&i); - availmem = i.freeram + i.bufferram; - /* however in linux 2.5 the i.bufferram is total page cache size, - we need adjust it */ - /* si_swapinfo(&i); */ - /* availmem = availmem - (i.totalswap - i.freeswap); */ - - nomem = (availmem < sysctl_ip_vs_amemthresh); - - local_bh_disable(); - - /* drop_entry */ - spin_lock(&__ip_vs_dropentry_lock); - switch (sysctl_ip_vs_drop_entry) { - case 0: - atomic_set(&ip_vs_dropentry, 0); - break; - case 1: - if (nomem) { - atomic_set(&ip_vs_dropentry, 1); - sysctl_ip_vs_drop_entry = 2; - } else { - atomic_set(&ip_vs_dropentry, 0); - } - break; - case 2: - if (nomem) { - atomic_set(&ip_vs_dropentry, 1); - } else { - atomic_set(&ip_vs_dropentry, 0); - sysctl_ip_vs_drop_entry = 1; - }; - break; - case 3: - atomic_set(&ip_vs_dropentry, 1); - break; - } - spin_unlock(&__ip_vs_dropentry_lock); - - /* drop_packet */ - spin_lock(&__ip_vs_droppacket_lock); - switch (sysctl_ip_vs_drop_packet) { - case 0: - ip_vs_drop_rate = 0; - break; - case 1: - if (nomem) { - ip_vs_drop_rate = ip_vs_drop_counter - = sysctl_ip_vs_amemthresh / - (sysctl_ip_vs_amemthresh-availmem); - sysctl_ip_vs_drop_packet = 2; - } else { - ip_vs_drop_rate = 0; - } - break; - case 2: - if (nomem) { - ip_vs_drop_rate = ip_vs_drop_counter - = sysctl_ip_vs_amemthresh / - (sysctl_ip_vs_amemthresh-availmem); - } else { - ip_vs_drop_rate = 0; - sysctl_ip_vs_drop_packet = 1; - } - break; - case 3: - ip_vs_drop_rate = sysctl_ip_vs_am_droprate; - break; - } - spin_unlock(&__ip_vs_droppacket_lock); - - /* secure_tcp */ - write_lock(&__ip_vs_securetcp_lock); - switch (sysctl_ip_vs_secure_tcp) { - case 0: - if (old_secure_tcp >= 2) - to_change = 0; - break; - case 1: - if (nomem) { - if (old_secure_tcp < 2) - to_change = 1; - sysctl_ip_vs_secure_tcp = 2; - } else { - if (old_secure_tcp >= 2) - to_change = 0; - } - break; - case 2: - if (nomem) { - if (old_secure_tcp < 2) - to_change = 1; - } else { - if (old_secure_tcp >= 2) - to_change = 0; - sysctl_ip_vs_secure_tcp = 1; - } - break; - case 3: - if (old_secure_tcp < 2) - to_change = 1; - break; - } - old_secure_tcp = sysctl_ip_vs_secure_tcp; - if (to_change >= 0) - ip_vs_protocol_timeout_change(sysctl_ip_vs_secure_tcp>1); - write_unlock(&__ip_vs_securetcp_lock); - - local_bh_enable(); -} - - -/* - * Timer for checking the defense - */ -#define DEFENSE_TIMER_PERIOD 1*HZ -static void defense_work_handler(struct work_struct *work); -static DECLARE_DELAYED_WORK(defense_work, defense_work_handler); - -static void defense_work_handler(struct work_struct *work) -{ - update_defense_level(); - if (atomic_read(&ip_vs_dropentry)) - ip_vs_random_dropentry(); - - schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD); -} - -int -ip_vs_use_count_inc(void) -{ - return try_module_get(THIS_MODULE); -} - -void -ip_vs_use_count_dec(void) -{ - module_put(THIS_MODULE); -} - - -/* - * Hash table: for virtual service lookups - */ -#define IP_VS_SVC_TAB_BITS 8 -#define IP_VS_SVC_TAB_SIZE (1 << IP_VS_SVC_TAB_BITS) -#define IP_VS_SVC_TAB_MASK (IP_VS_SVC_TAB_SIZE - 1) - -/* the service table hashed by <protocol, addr, port> */ -static struct list_head ip_vs_svc_table[IP_VS_SVC_TAB_SIZE]; -/* the service table hashed by fwmark */ -static struct list_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE]; - -/* - * Hash table: for real service lookups - */ -#define IP_VS_RTAB_BITS 4 -#define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS) -#define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1) - -static struct list_head ip_vs_rtable[IP_VS_RTAB_SIZE]; - -/* - * Trash for destinations - */ -static LIST_HEAD(ip_vs_dest_trash); - -/* - * FTP & NULL virtual service counters - */ -static atomic_t ip_vs_ftpsvc_counter = ATOMIC_INIT(0); -static atomic_t ip_vs_nullsvc_counter = ATOMIC_INIT(0); - - -/* - * Returns hash value for virtual service - */ -static __inline__ unsigned -ip_vs_svc_hashkey(int af, unsigned proto, const union nf_inet_addr *addr, - __be16 port) -{ - register unsigned porth = ntohs(port); - __be32 addr_fold = addr->ip; - -#ifdef CONFIG_IP_VS_IPV6 - if (af == AF_INET6) - addr_fold = addr->ip6[0]^addr->ip6[1]^ - addr->ip6[2]^addr->ip6[3]; -#endif - - return (proto^ntohl(addr_fold)^(porth>>IP_VS_SVC_TAB_BITS)^porth) - & IP_VS_SVC_TAB_MASK; -} - -/* - * Returns hash value of fwmark for virtual service lookup - */ -static __inline__ unsigned ip_vs_svc_fwm_hashkey(__u32 fwmark) -{ - return fwmark & IP_VS_SVC_TAB_MASK; -} - -/* - * Hashes a service in the ip_vs_svc_table by <proto,addr,port> - * or in the ip_vs_svc_fwm_table by fwmark. - * Should be called with locked tables. - */ -static int ip_vs_svc_hash(struct ip_vs_service *svc) -{ - unsigned hash; - - if (svc->flags & IP_VS_SVC_F_HASHED) { - IP_VS_ERR("ip_vs_svc_hash(): request for already hashed, " - "called from %p\n", __builtin_return_address(0)); - return 0; - } - - if (svc->fwmark == 0) { - /* - * Hash it by <protocol,addr,port> in ip_vs_svc_table - */ - hash = ip_vs_svc_hashkey(svc->af, svc->protocol, &svc->addr, - svc->port); - list_add(&svc->s_list, &ip_vs_svc_table[hash]); - } else { - /* - * Hash it by fwmark in ip_vs_svc_fwm_table - */ - hash = ip_vs_svc_fwm_hashkey(svc->fwmark); - list_add(&svc->f_list, &ip_vs_svc_fwm_table[hash]); - } - - svc->flags |= IP_VS_SVC_F_HASHED; - /* increase its refcnt because it is referenced by the svc table */ - atomic_inc(&svc->refcnt); - return 1; -} - - -/* - * Unhashes a service from ip_vs_svc_table/ip_vs_svc_fwm_table. - * Should be called with locked tables. - */ -static int ip_vs_svc_unhash(struct ip_vs_service *svc) -{ - if (!(svc->flags & IP_VS_SVC_F_HASHED)) { - IP_VS_ERR("ip_vs_svc_unhash(): request for unhash flagged, " - "called from %p\n", __builtin_return_address(0)); - return 0; - } - - if (svc->fwmark == 0) { - /* Remove it from the ip_vs_svc_table table */ - list_del(&svc->s_list); - } else { - /* Remove it from the ip_vs_svc_fwm_table table */ - list_del(&svc->f_list); - } - - svc->flags &= ~IP_VS_SVC_F_HASHED; - atomic_dec(&svc->refcnt); - return 1; -} - - -/* - * Get service by {proto,addr,port} in the service table. - */ -static inline struct ip_vs_service * -__ip_vs_service_get(int af, __u16 protocol, const union nf_inet_addr *vaddr, - __be16 vport) -{ - unsigned hash; - struct ip_vs_service *svc; - - /* Check for "full" addressed entries */ - hash = ip_vs_svc_hashkey(af, protocol, vaddr, vport); - - list_for_each_entry(svc, &ip_vs_svc_table[hash], s_list){ - if ((svc->af == af) - && ip_vs_addr_equal(af, &svc->addr, vaddr) - && (svc->port == vport) - && (svc->protocol == protocol)) { - /* HIT */ - atomic_inc(&svc->usecnt); - return svc; - } - } - - return NULL; -} - - -/* - * Get service by {fwmark} in the service table. - */ -static inline struct ip_vs_service * -__ip_vs_svc_fwm_get(int af, __u32 fwmark) -{ - unsigned hash; - struct ip_vs_service *svc; - - /* Check for fwmark addressed entries */ - hash = ip_vs_svc_fwm_hashkey(fwmark); - - list_for_each_entry(svc, &ip_vs_svc_fwm_table[hash], f_list) { - if (svc->fwmark == fwmark && svc->af == af) { - /* HIT */ - atomic_inc(&svc->usecnt); - return svc; - } - } - - return NULL; -} - -struct ip_vs_service * -ip_vs_service_get(int af, __u32 fwmark, __u16 protocol, - const union nf_inet_addr *vaddr, __be16 vport) -{ - struct ip_vs_service *svc; - - read_lock(&__ip_vs_svc_lock); - - /* - * Check the table hashed by fwmark first - */ - if (fwmark && (svc = __ip_vs_svc_fwm_get(af, fwmark))) - goto out; - - /* - * Check the table hashed by <protocol,addr,port> - * for "full" addressed entries - */ - svc = __ip_vs_service_get(af, protocol, vaddr, vport); - - if (svc == NULL - && protocol == IPPROTO_TCP - && atomic_read(&ip_vs_ftpsvc_counter) - && (vport == FTPDATA || ntohs(vport) >= PROT_SOCK)) { - /* - * Check if ftp service entry exists, the packet - * might belong to FTP data connections. - */ - svc = __ip_vs_service_get(af, protocol, vaddr, FTPPORT); - } - - if (svc == NULL - && atomic_read(&ip_vs_nullsvc_counter)) { - /* - * Check if the catch-all port (port zero) exists - */ - svc = __ip_vs_service_get(af, protocol, vaddr, 0); - } - - out: - read_unlock(&__ip_vs_svc_lock); - - IP_VS_DBG_BUF(9, "lookup service: fwm %u %s %s:%u %s\n", - fwmark, ip_vs_proto_name(protocol), - IP_VS_DBG_ADDR(af, vaddr), ntohs(vport), - svc ? "hit" : "not hit"); - - return svc; -} - - -static inline void -__ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc) -{ - atomic_inc(&svc->refcnt); - dest->svc = svc; -} - -static inline void -__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(int af, - const union nf_inet_addr *addr, - __be16 port) -{ - register unsigned porth = ntohs(port); - __be32 addr_fold = addr->ip; - -#ifdef CONFIG_IP_VS_IPV6 - if (af == AF_INET6) - addr_fold = addr->ip6[0]^addr->ip6[1]^ - addr->ip6[2]^addr->ip6[3]; -#endif - - return (ntohl(addr_fold)^(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->af, &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(int af, __u16 protocol, - const union nf_inet_addr *daddr, - __be16 dport) -{ - unsigned hash; - struct ip_vs_dest *dest; - - /* - * Check for "full" addressed entries - * Return the first found entry - */ - hash = ip_vs_rs_hashkey(af, daddr, dport); - - read_lock(&__ip_vs_rs_lock); - list_for_each_entry(dest, &ip_vs_rtable[hash], d_list) { - if ((dest->af == af) - && ip_vs_addr_equal(af, &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, const union nf_inet_addr *daddr, - __be16 dport) -{ - struct ip_vs_dest *dest; - - /* - * Find the destination for the given service - */ - list_for_each_entry(dest, &svc->destinations, n_list) { - if ((dest->af == svc->af) - && ip_vs_addr_equal(svc->af, &dest->addr, daddr) - && (dest->port == dport)) { - /* HIT */ - return dest; - } - } - - return NULL; -} - -/* - * Find destination by {daddr,dport,vaddr,protocol} - * Cretaed to be used in ip_vs_process_message() in - * the backup synchronization daemon. It finds the - * destination to be bound to the received connection - * on the backup. - * - * ip_vs_lookup_real_service() looked promissing, but - * seems not working as expected. - */ -struct ip_vs_dest *ip_vs_find_dest(int af, const union nf_inet_addr *daddr, - __be16 dport, - const union nf_inet_addr *vaddr, - __be16 vport, __u16 protocol) -{ - struct ip_vs_dest *dest; - struct ip_vs_service *svc; - - svc = ip_vs_service_get(af, 0, protocol, vaddr, vport); - if (!svc) - return NULL; - dest = ip_vs_lookup_dest(svc, daddr, dport); - if (dest) - atomic_inc(&dest->refcnt); - ip_vs_service_put(svc); - return dest; -} - -/* - * 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, const union nf_inet_addr *daddr, - __be16 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_BUF(3, "Destination %u/%s:%u still in trash, " - "dest->refcnt=%d\n", - dest->vfwmark, - IP_VS_DBG_ADDR(svc->af, &dest->addr), - ntohs(dest->port), - atomic_read(&dest->refcnt)); - if (dest->af == svc->af && - ip_vs_addr_equal(svc->af, &dest->addr, daddr) && - dest->port == dport && - dest->vfwmark == svc->fwmark && - dest->protocol == svc->protocol && - (svc->fwmark || - (ip_vs_addr_equal(svc->af, &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_BUF(3, "Removing destination %u/%s:%u " - "from trash\n", - dest->vfwmark, - IP_VS_DBG_ADDR(svc->af, &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->ustats, 0, sizeof(stats->ustats)); - ip_vs_zero_estimator(stats); - - spin_unlock_bh(&stats->lock); -} - -/* - * 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_kern *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 */ -#ifdef CONFIG_IP_VS_IPV6 - if (svc->af == AF_INET6) { - if (__ip_vs_addr_is_local_v6(&udest->addr.in6)) { - conn_flags = (conn_flags & ~IP_VS_CONN_F_FWD_MASK) - | IP_VS_CONN_F_LOCALNODE; - } - } else -#endif - if (inet_addr_type(&init_net, udest->addr.ip) == 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_kern *udest, - struct ip_vs_dest **dest_p) -{ - struct ip_vs_dest *dest; - unsigned atype; - - EnterFunction(2); - -#ifdef CONFIG_IP_VS_IPV6 - if (svc->af == AF_INET6) { - atype = ipv6_addr_type(&udest->addr.in6); - if ((!(atype & IPV6_ADDR_UNICAST) || - atype & IPV6_ADDR_LINKLOCAL) && - !__ip_vs_addr_is_local_v6(&udest->addr.in6)) - return -EINVAL; - } else -#endif - { - atype = inet_addr_type(&init_net, udest->addr.ip); - if (atype != RTN_LOCAL && atype != RTN_UNICAST) - return -EINVAL; - } - - dest = kzalloc(sizeof(struct ip_vs_dest), GFP_ATOMIC); - if (dest == NULL) { - IP_VS_ERR("ip_vs_new_dest: kmalloc failed.\n"); - return -ENOMEM; - } - - dest->af = svc->af; - dest->protocol = svc->protocol; - dest->vaddr = svc->addr; - dest->vport = svc->port; - dest->vfwmark = svc->fwmark; - ip_vs_addr_copy(svc->af, &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_kern *udest) -{ - struct ip_vs_dest *dest; - union nf_inet_addr daddr; - __be16 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; - } - - ip_vs_addr_copy(svc->af, &daddr, &udest->addr); - - /* - * 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_BUF(3, "Get destination %s:%u from trash, " - "dest->refcnt=%d, service %u/%s:%u\n", - IP_VS_DBG_ADDR(svc->af, &daddr), ntohs(dport), - atomic_read(&dest->refcnt), - dest->vfwmark, - IP_VS_DBG_ADDR(svc->af, &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 */ - if (svc->scheduler->update_service) - 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 */ - if (svc->scheduler->update_service) - 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_kern *udest) -{ - struct ip_vs_dest *dest; - union nf_inet_addr daddr; - __be16 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; - } - - ip_vs_addr_copy(svc->af, &daddr, &udest->addr); - - /* - * 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 */ - IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1); - - /* call the update_service, because server weight may be changed */ - if (svc->scheduler->update_service) - 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_BUF(3, "Moving dest %s:%u into trash, " - "dest->refcnt=%d\n", - IP_VS_DBG_ADDR(dest->af, &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--; - - /* - * Call the update_service function of its scheduler - */ - if (svcupd && svc->scheduler->update_service) - 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_kern *udest) -{ - struct ip_vs_dest *dest; - __be16 dport = udest->port; - - EnterFunction(2); - - dest = ip_vs_lookup_dest(svc, &udest->addr, 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_kern *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; - } - -#ifdef CONFIG_IP_VS_IPV6 - if (u->af == AF_INET6) { - if (!sched->supports_ipv6) { - ret = -EAFNOSUPPORT; - goto out_err; - } - if ((u->netmask < 1) || (u->netmask > 128)) { - ret = -EINVAL; - goto out_err; - } - } -#endif - - svc = kzalloc(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; - } - - /* I'm the first user of the service */ - atomic_set(&svc->usecnt, 1); - atomic_set(&svc->refcnt, 0); - - svc->af = u->af; - svc->protocol = u->protocol; - ip_vs_addr_copy(svc->af, &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); - - /* Count only IPv4 services for old get/setsockopt interface */ - if (svc->af == AF_INET) - 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_kern *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; - -#ifdef CONFIG_IP_VS_IPV6 - if (u->af == AF_INET6) { - if (!sched->supports_ipv6) { - ret = -EAFNOSUPPORT; - goto out; - } - if ((u->netmask < 1) || (u->netmask > 128)) { - ret = -EINVAL; - goto out; - } - } -#endif - - 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_unlock; - } - - /* - * 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_unlock; - } - } - - out_unlock: - write_unlock_bh(&__ip_vs_svc_lock); - out: - - 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; - - /* Count only IPv4 services for old get/setsockopt interface */ - if (svc->af == AF_INET) - 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[] = { - { - .procname = "amemthresh", - .data = &sysctl_ip_vs_amemthresh, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dointvec, - }, -#ifdef CONFIG_IP_VS_DEBUG - { - .procname = "debug_level", - .data = &sysctl_ip_vs_debug_level, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dointvec, - }, -#endif - { - .procname = "am_droprate", - .data = &sysctl_ip_vs_am_droprate, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dointvec, - }, - { - .procname = "drop_entry", - .data = &sysctl_ip_vs_drop_entry, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_do_defense_mode, - }, - { - .procname = "drop_packet", - .data = &sysctl_ip_vs_drop_packet, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_do_defense_mode, - }, - { - .procname = "secure_tcp", - .data = &sysctl_ip_vs_secure_tcp, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_do_defense_mode, - }, -#if 0 - { - .procname = "timeout_established", - .data = &vs_timeout_table_dos.timeout[IP_VS_S_ESTABLISHED], - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dointvec_jiffies, - }, - { - .procname = "timeout_synsent", - .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_SENT], - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dointvec_jiffies, - }, - { - .procname = "timeout_synrecv", - .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_RECV], - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dointvec_jiffies, - }, - { - .procname = "timeout_finwait", - .data = &vs_timeout_table_dos.timeout[IP_VS_S_FIN_WAIT], - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dointvec_jiffies, - }, - { - .procname = "timeout_timewait", - .data = &vs_timeout_table_dos.timeout[IP_VS_S_TIME_WAIT], - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dointvec_jiffies, - }, - { - .procname = "timeout_close", - .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE], - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dointvec_jiffies, - }, - { - .procname = "timeout_closewait", - .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE_WAIT], - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dointvec_jiffies, - }, - { - .procname = "timeout_lastack", - .data = &vs_timeout_table_dos.timeout[IP_VS_S_LAST_ACK], - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dointvec_jiffies, - }, - { - .procname = "timeout_listen", - .data = &vs_timeout_table_dos.timeout[IP_VS_S_LISTEN], - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dointvec_jiffies, - }, - { - .procname = "timeout_synack", - .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYNACK], - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dointvec_jiffies, - }, - { - .procname = "timeout_udp", - .data = &vs_timeout_table_dos.timeout[IP_VS_S_UDP], - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dointvec_jiffies, - }, - { - .procname = "timeout_icmp", - .data = &vs_timeout_table_dos.timeout[IP_VS_S_ICMP], - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dointvec_jiffies, - }, -#endif - { - .procname = "cache_bypass", - .data = &sysctl_ip_vs_cache_bypass, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dointvec, - }, - { - .procname = "expire_nodest_conn", - .data = &sysctl_ip_vs_expire_nodest_conn, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dointvec, - }, - { - .procname = "expire_quiescent_template", - .data = &sysctl_ip_vs_expire_quiescent_template, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dointvec, - }, - { - .procname = "sync_threshold", - .data = &sysctl_ip_vs_sync_threshold, - .maxlen = sizeof(sysctl_ip_vs_sync_threshold), - .mode = 0644, - .proc_handler = &proc_do_sync_threshold, - }, - { - .procname = "nat_icmp_send", - .data = &sysctl_ip_vs_nat_icmp_send, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dointvec, - }, - { .ctl_name = 0 } -}; - -const struct ctl_path net_vs_ctl_path[] = { - { .procname = "net", .ctl_name = CTL_NET, }, - { .procname = "ipv4", .ctl_name = NET_IPV4, }, - { .procname = "vs", }, - { } -}; -EXPORT_SYMBOL_GPL(net_vs_ctl_path); - -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) -__acquires(__ip_vs_svc_lock) -{ - - 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) -__releases(__ip_vs_svc_lock) -{ - 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) { -#ifdef CONFIG_IP_VS_IPV6 - if (svc->af == AF_INET6) - seq_printf(seq, "%s [" NIP6_FMT "]:%04X %s ", - ip_vs_proto_name(svc->protocol), - NIP6(svc->addr.in6), - ntohs(svc->port), - svc->scheduler->name); - else -#endif - seq_printf(seq, "%s %08X:%04X %s ", - ip_vs_proto_name(svc->protocol), - ntohl(svc->addr.ip), - 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) { -#ifdef CONFIG_IP_VS_IPV6 - if (dest->af == AF_INET6) - seq_printf(seq, - " -> [" NIP6_FMT "]:%04X" - " %-7s %-6d %-10d %-10d\n", - NIP6(dest->addr.in6), - ntohs(dest->port), - ip_vs_fwd_name(atomic_read(&dest->conn_flags)), - atomic_read(&dest->weight), - atomic_read(&dest->activeconns), - atomic_read(&dest->inactconns)); - else -#endif - seq_printf(seq, - " -> %08X:%04X " - "%-7s %-6d %-10d %-10d\n", - ntohl(dest->addr.ip), - 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 const 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) -{ - return seq_open_private(file, &ip_vs_info_seq_ops, - sizeof(struct ip_vs_iter)); -} - -static const 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 = { - .lock = __SPIN_LOCK_UNLOCKED(ip_vs_stats.lock), -}; - -#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.ustats.conns, - ip_vs_stats.ustats.inpkts, ip_vs_stats.ustats.outpkts, - (unsigned long long) ip_vs_stats.ustats.inbytes, - (unsigned long long) ip_vs_stats.ustats.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.ustats.cps, - ip_vs_stats.ustats.inpps, - ip_vs_stats.ustats.outpps, - ip_vs_stats.ustats.inbps, - ip_vs_stats.ustats.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 const 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 void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc, - struct ip_vs_service_user *usvc_compat) -{ - usvc->af = AF_INET; - usvc->protocol = usvc_compat->protocol; - usvc->addr.ip = usvc_compat->addr; - usvc->port = usvc_compat->port; - usvc->fwmark = usvc_compat->fwmark; - - /* Deep copy of sched_name is not needed here */ - usvc->sched_name = usvc_compat->sched_name; - - usvc->flags = usvc_compat->flags; - usvc->timeout = usvc_compat->timeout; - usvc->netmask = usvc_compat->netmask; -} - -static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest, - struct ip_vs_dest_user *udest_compat) -{ - udest->addr.ip = udest_compat->addr; - udest->port = udest_compat->port; - udest->conn_flags = udest_compat->conn_flags; - udest->weight = udest_compat->weight; - udest->u_threshold = udest_compat->u_threshold; - udest->l_threshold = udest_compat->l_threshold; -} - -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_compat; - struct ip_vs_service_user_kern usvc; - struct ip_vs_service *svc; - struct ip_vs_dest_user *udest_compat; - struct ip_vs_dest_user_kern 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_compat = (struct ip_vs_service_user *)arg; - udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1); - - /* We only use the new structs internally, so copy userspace compat - * structs to extended internal versions */ - ip_vs_copy_usvc_compat(&usvc, usvc_compat); - ip_vs_copy_udest_compat(&udest, udest_compat); - - if (cmd == IP_VS_SO_SET_ZERO) { - /* if no service address is set, zero counters in all */ - if (!usvc.fwmark && !usvc.addr.ip && !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.ip), - 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.af, usvc.protocol, - &usvc.addr, usvc.port); - else - svc = __ip_vs_svc_fwm_get(usvc.af, 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->ustats, sizeof(*dst)); - 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.ip; - 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) { - /* Only expose IPv4 entries to old interface */ - if (svc->af != AF_INET) - continue; - - 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) { - /* Only expose IPv4 entries to old interface */ - if (svc->af != AF_INET) - continue; - - 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; - union nf_inet_addr addr = { .ip = get->addr }; - int ret = 0; - - if (get->fwmark) - svc = __ip_vs_svc_fwm_get(AF_INET, get->fwmark); - else - svc = __ip_vs_service_get(AF_INET, get->protocol, &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.ip; - 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; - union nf_inet_addr addr; - - entry = (struct ip_vs_service_entry *)arg; - addr.ip = entry->addr; - if (entry->fwmark) - svc = __ip_vs_svc_fwm_get(AF_INET, entry->fwmark); - else - svc = __ip_vs_service_get(AF_INET, entry->protocol, - &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, - .owner = THIS_MODULE, -}; - -/* - * Generic Netlink interface - */ - -/* IPVS genetlink family */ -static struct genl_family ip_vs_genl_family = { - .id = GENL_ID_GENERATE, - .hdrsize = 0, - .name = IPVS_GENL_NAME, - .version = IPVS_GENL_VERSION, - .maxattr = IPVS_CMD_MAX, -}; - -/* Policy used for first-level command attributes */ -static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = { - [IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED }, - [IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED }, - [IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED }, - [IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 }, - [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 }, - [IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 }, -}; - -/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */ -static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = { - [IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 }, - [IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING, - .len = IP_VS_IFNAME_MAXLEN }, - [IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 }, -}; - -/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */ -static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = { - [IPVS_SVC_ATTR_AF] = { .type = NLA_U16 }, - [IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 }, - [IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY, - .len = sizeof(union nf_inet_addr) }, - [IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 }, - [IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 }, - [IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING, - .len = IP_VS_SCHEDNAME_MAXLEN }, - [IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY, - .len = sizeof(struct ip_vs_flags) }, - [IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 }, - [IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 }, - [IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED }, -}; - -/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */ -static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = { - [IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY, - .len = sizeof(union nf_inet_addr) }, - [IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 }, - [IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 }, - [IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 }, - [IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 }, - [IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 }, - [IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 }, - [IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 }, - [IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 }, - [IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED }, -}; - -static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type, - struct ip_vs_stats *stats) -{ - struct nlattr *nl_stats = nla_nest_start(skb, container_type); - if (!nl_stats) - return -EMSGSIZE; - - spin_lock_bh(&stats->lock); - - NLA_PUT_U32(skb, IPVS_STATS_ATTR_CONNS, stats->ustats.conns); - NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPKTS, stats->ustats.inpkts); - NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPKTS, stats->ustats.outpkts); - NLA_PUT_U64(skb, IPVS_STATS_ATTR_INBYTES, stats->ustats.inbytes); - NLA_PUT_U64(skb, IPVS_STATS_ATTR_OUTBYTES, stats->ustats.outbytes); - NLA_PUT_U32(skb, IPVS_STATS_ATTR_CPS, stats->ustats.cps); - NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPPS, stats->ustats.inpps); - NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPPS, stats->ustats.outpps); - NLA_PUT_U32(skb, IPVS_STATS_ATTR_INBPS, stats->ustats.inbps); - NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTBPS, stats->ustats.outbps); - - spin_unlock_bh(&stats->lock); - - nla_nest_end(skb, nl_stats); - - return 0; - -nla_put_failure: - spin_unlock_bh(&stats->lock); - nla_nest_cancel(skb, nl_stats); - return -EMSGSIZE; -} - -static int ip_vs_genl_fill_service(struct sk_buff *skb, - struct ip_vs_service *svc) -{ - struct nlattr *nl_service; - struct ip_vs_flags flags = { .flags = svc->flags, - .mask = ~0 }; - - nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE); - if (!nl_service) - return -EMSGSIZE; - - NLA_PUT_U16(skb, IPVS_SVC_ATTR_AF, svc->af); - - if (svc->fwmark) { - NLA_PUT_U32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark); - } else { - NLA_PUT_U16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol); - NLA_PUT(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr); - NLA_PUT_U16(skb, IPVS_SVC_ATTR_PORT, svc->port); - } - - NLA_PUT_STRING(skb, IPVS_SVC_ATTR_SCHED_NAME, svc->scheduler->name); - NLA_PUT(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags); - NLA_PUT_U32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ); - NLA_PUT_U32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask); - - if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &svc->stats)) - goto nla_put_failure; - - nla_nest_end(skb, nl_service); - - return 0; - -nla_put_failure: - nla_nest_cancel(skb, nl_service); - return -EMSGSIZE; -} - -static int ip_vs_genl_dump_service(struct sk_buff *skb, - struct ip_vs_service *svc, - struct netlink_callback *cb) -{ - void *hdr; - - hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, - &ip_vs_genl_family, NLM_F_MULTI, - IPVS_CMD_NEW_SERVICE); - if (!hdr) - return -EMSGSIZE; - - if (ip_vs_genl_fill_service(skb, svc) < 0) - goto nla_put_failure; - - return genlmsg_end(skb, hdr); - -nla_put_failure: - genlmsg_cancel(skb, hdr); - return -EMSGSIZE; -} - -static int ip_vs_genl_dump_services(struct sk_buff *skb, - struct netlink_callback *cb) -{ - int idx = 0, i; - int start = cb->args[0]; - struct ip_vs_service *svc; - - mutex_lock(&__ip_vs_mutex); - for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) { - list_for_each_entry(svc, &ip_vs_svc_table[i], s_list) { - if (++idx <= start) - continue; - if (ip_vs_genl_dump_service(skb, svc, cb) < 0) { - idx--; - goto nla_put_failure; - } - } - } - - for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) { - list_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) { - if (++idx <= start) - continue; - if (ip_vs_genl_dump_service(skb, svc, cb) < 0) { - idx--; - goto nla_put_failure; - } - } - } - -nla_put_failure: - mutex_unlock(&__ip_vs_mutex); - cb->args[0] = idx; - - return skb->len; -} - -static int ip_vs_genl_parse_service(struct ip_vs_service_user_kern *usvc, - struct nlattr *nla, int full_entry) -{ - struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1]; - struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr; - - /* Parse mandatory identifying service fields first */ - if (nla == NULL || - nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla, ip_vs_svc_policy)) - return -EINVAL; - - nla_af = attrs[IPVS_SVC_ATTR_AF]; - nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL]; - nla_addr = attrs[IPVS_SVC_ATTR_ADDR]; - nla_port = attrs[IPVS_SVC_ATTR_PORT]; - nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK]; - - if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr)))) - return -EINVAL; - - usvc->af = nla_get_u16(nla_af); -#ifdef CONFIG_IP_VS_IPV6 - if (usvc->af != AF_INET && usvc->af != AF_INET6) -#else - if (usvc->af != AF_INET) -#endif - return -EAFNOSUPPORT; - - if (nla_fwmark) { - usvc->protocol = IPPROTO_TCP; - usvc->fwmark = nla_get_u32(nla_fwmark); - } else { - usvc->protocol = nla_get_u16(nla_protocol); - nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr)); - usvc->port = nla_get_u16(nla_port); - usvc->fwmark = 0; - } - - /* If a full entry was requested, check for the additional fields */ - if (full_entry) { - struct nlattr *nla_sched, *nla_flags, *nla_timeout, - *nla_netmask; - struct ip_vs_flags flags; - struct ip_vs_service *svc; - - nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME]; - nla_flags = attrs[IPVS_SVC_ATTR_FLAGS]; - nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT]; - nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK]; - - if (!(nla_sched && nla_flags && nla_timeout && nla_netmask)) - return -EINVAL; - - nla_memcpy(&flags, nla_flags, sizeof(flags)); - - /* prefill flags from service if it already exists */ - if (usvc->fwmark) - svc = __ip_vs_svc_fwm_get(usvc->af, usvc->fwmark); - else - svc = __ip_vs_service_get(usvc->af, usvc->protocol, - &usvc->addr, usvc->port); - if (svc) { - usvc->flags = svc->flags; - ip_vs_service_put(svc); - } else - usvc->flags = 0; - - /* set new flags from userland */ - usvc->flags = (usvc->flags & ~flags.mask) | - (flags.flags & flags.mask); - usvc->sched_name = nla_data(nla_sched); - usvc->timeout = nla_get_u32(nla_timeout); - usvc->netmask = nla_get_u32(nla_netmask); - } - - return 0; -} - -static struct ip_vs_service *ip_vs_genl_find_service(struct nlattr *nla) -{ - struct ip_vs_service_user_kern usvc; - int ret; - - ret = ip_vs_genl_parse_service(&usvc, nla, 0); - if (ret) - return ERR_PTR(ret); - - if (usvc.fwmark) - return __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark); - else - return __ip_vs_service_get(usvc.af, usvc.protocol, - &usvc.addr, usvc.port); -} - -static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest) -{ - struct nlattr *nl_dest; - - nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST); - if (!nl_dest) - return -EMSGSIZE; - - NLA_PUT(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr); - NLA_PUT_U16(skb, IPVS_DEST_ATTR_PORT, dest->port); - - NLA_PUT_U32(skb, IPVS_DEST_ATTR_FWD_METHOD, - atomic_read(&dest->conn_flags) & IP_VS_CONN_F_FWD_MASK); - NLA_PUT_U32(skb, IPVS_DEST_ATTR_WEIGHT, atomic_read(&dest->weight)); - NLA_PUT_U32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold); - NLA_PUT_U32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold); - NLA_PUT_U32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS, - atomic_read(&dest->activeconns)); - NLA_PUT_U32(skb, IPVS_DEST_ATTR_INACT_CONNS, - atomic_read(&dest->inactconns)); - NLA_PUT_U32(skb, IPVS_DEST_ATTR_PERSIST_CONNS, - atomic_read(&dest->persistconns)); - - if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &dest->stats)) - goto nla_put_failure; - - nla_nest_end(skb, nl_dest); - - return 0; - -nla_put_failure: - nla_nest_cancel(skb, nl_dest); - return -EMSGSIZE; -} - -static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest, - struct netlink_callback *cb) -{ - void *hdr; - - hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, - &ip_vs_genl_family, NLM_F_MULTI, - IPVS_CMD_NEW_DEST); - if (!hdr) - return -EMSGSIZE; - - if (ip_vs_genl_fill_dest(skb, dest) < 0) - goto nla_put_failure; - - return genlmsg_end(skb, hdr); - -nla_put_failure: - genlmsg_cancel(skb, hdr); - return -EMSGSIZE; -} - -static int ip_vs_genl_dump_dests(struct sk_buff *skb, - struct netlink_callback *cb) -{ - int idx = 0; - int start = cb->args[0]; - struct ip_vs_service *svc; - struct ip_vs_dest *dest; - struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1]; - - mutex_lock(&__ip_vs_mutex); - - /* Try to find the service for which to dump destinations */ - if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs, - IPVS_CMD_ATTR_MAX, ip_vs_cmd_policy)) - goto out_err; - - svc = ip_vs_genl_find_service(attrs[IPVS_CMD_ATTR_SERVICE]); - if (IS_ERR(svc) || svc == NULL) - goto out_err; - - /* Dump the destinations */ - list_for_each_entry(dest, &svc->destinations, n_list) { - if (++idx <= start) - continue; - if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) { - idx--; - goto nla_put_failure; - } - } - -nla_put_failure: - cb->args[0] = idx; - ip_vs_service_put(svc); - -out_err: - mutex_unlock(&__ip_vs_mutex); - - return skb->len; -} - -static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest, - struct nlattr *nla, int full_entry) -{ - struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1]; - struct nlattr *nla_addr, *nla_port; - - /* Parse mandatory identifying destination fields first */ - if (nla == NULL || - nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla, ip_vs_dest_policy)) - return -EINVAL; - - nla_addr = attrs[IPVS_DEST_ATTR_ADDR]; - nla_port = attrs[IPVS_DEST_ATTR_PORT]; - - if (!(nla_addr && nla_port)) - return -EINVAL; - - nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr)); - udest->port = nla_get_u16(nla_port); - - /* If a full entry was requested, check for the additional fields */ - if (full_entry) { - struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh, - *nla_l_thresh; - - nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD]; - nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT]; - nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH]; - nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH]; - - if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh)) - return -EINVAL; - - udest->conn_flags = nla_get_u32(nla_fwd) - & IP_VS_CONN_F_FWD_MASK; - udest->weight = nla_get_u32(nla_weight); - udest->u_threshold = nla_get_u32(nla_u_thresh); - udest->l_threshold = nla_get_u32(nla_l_thresh); - } - - return 0; -} - -static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __be32 state, - const char *mcast_ifn, __be32 syncid) -{ - struct nlattr *nl_daemon; - - nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON); - if (!nl_daemon) - return -EMSGSIZE; - - NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_STATE, state); - NLA_PUT_STRING(skb, IPVS_DAEMON_ATTR_MCAST_IFN, mcast_ifn); - NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_SYNC_ID, syncid); - - nla_nest_end(skb, nl_daemon); - - return 0; - -nla_put_failure: - nla_nest_cancel(skb, nl_daemon); - return -EMSGSIZE; -} - -static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __be32 state, - const char *mcast_ifn, __be32 syncid, - struct netlink_callback *cb) -{ - void *hdr; - hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, - &ip_vs_genl_family, NLM_F_MULTI, - IPVS_CMD_NEW_DAEMON); - if (!hdr) - return -EMSGSIZE; - - if (ip_vs_genl_fill_daemon(skb, state, mcast_ifn, syncid)) - goto nla_put_failure; - - return genlmsg_end(skb, hdr); - -nla_put_failure: - genlmsg_cancel(skb, hdr); - return -EMSGSIZE; -} - -static int ip_vs_genl_dump_daemons(struct sk_buff *skb, - struct netlink_callback *cb) -{ - mutex_lock(&__ip_vs_mutex); - if ((ip_vs_sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) { - if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER, - ip_vs_master_mcast_ifn, - ip_vs_master_syncid, cb) < 0) - goto nla_put_failure; - - cb->args[0] = 1; - } - - if ((ip_vs_sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) { - if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP, - ip_vs_backup_mcast_ifn, - ip_vs_backup_syncid, cb) < 0) - goto nla_put_failure; - - cb->args[1] = 1; - } - -nla_put_failure: - mutex_unlock(&__ip_vs_mutex); - - return skb->len; -} - -static int ip_vs_genl_new_daemon(struct nlattr **attrs) -{ - if (!(attrs[IPVS_DAEMON_ATTR_STATE] && - attrs[IPVS_DAEMON_ATTR_MCAST_IFN] && - attrs[IPVS_DAEMON_ATTR_SYNC_ID])) - return -EINVAL; - - return start_sync_thread(nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]), - nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]), - nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID])); -} - -static int ip_vs_genl_del_daemon(struct nlattr **attrs) -{ - if (!attrs[IPVS_DAEMON_ATTR_STATE]) - return -EINVAL; - - return stop_sync_thread(nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE])); -} - -static int ip_vs_genl_set_config(struct nlattr **attrs) -{ - struct ip_vs_timeout_user t; - - __ip_vs_get_timeouts(&t); - - if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]) - t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]); - - if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]) - t.tcp_fin_timeout = - nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]); - - if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]) - t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]); - - return ip_vs_set_timeout(&t); -} - -static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info) -{ - struct ip_vs_service *svc = NULL; - struct ip_vs_service_user_kern usvc; - struct ip_vs_dest_user_kern udest; - int ret = 0, cmd; - int need_full_svc = 0, need_full_dest = 0; - - cmd = info->genlhdr->cmd; - - mutex_lock(&__ip_vs_mutex); - - if (cmd == IPVS_CMD_FLUSH) { - ret = ip_vs_flush(); - goto out; - } else if (cmd == IPVS_CMD_SET_CONFIG) { - ret = ip_vs_genl_set_config(info->attrs); - goto out; - } else if (cmd == IPVS_CMD_NEW_DAEMON || - cmd == IPVS_CMD_DEL_DAEMON) { - - struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1]; - - if (!info->attrs[IPVS_CMD_ATTR_DAEMON] || - nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX, - info->attrs[IPVS_CMD_ATTR_DAEMON], - ip_vs_daemon_policy)) { - ret = -EINVAL; - goto out; - } - - if (cmd == IPVS_CMD_NEW_DAEMON) - ret = ip_vs_genl_new_daemon(daemon_attrs); - else - ret = ip_vs_genl_del_daemon(daemon_attrs); - goto out; - } else if (cmd == IPVS_CMD_ZERO && - !info->attrs[IPVS_CMD_ATTR_SERVICE]) { - ret = ip_vs_zero_all(); - goto out; - } - - /* All following commands require a service argument, so check if we - * received a valid one. We need a full service specification when - * adding / editing a service. Only identifying members otherwise. */ - if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE) - need_full_svc = 1; - - ret = ip_vs_genl_parse_service(&usvc, - info->attrs[IPVS_CMD_ATTR_SERVICE], - need_full_svc); - if (ret) - goto out; - - /* Lookup the exact service by <protocol, addr, port> or fwmark */ - if (usvc.fwmark == 0) - svc = __ip_vs_service_get(usvc.af, usvc.protocol, - &usvc.addr, usvc.port); - else - svc = __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark); - - /* Unless we're adding a new service, the service must already exist */ - if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) { - ret = -ESRCH; - goto out; - } - - /* Destination commands require a valid destination argument. For - * adding / editing a destination, we need a full destination - * specification. */ - if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST || - cmd == IPVS_CMD_DEL_DEST) { - if (cmd != IPVS_CMD_DEL_DEST) - need_full_dest = 1; - - ret = ip_vs_genl_parse_dest(&udest, - info->attrs[IPVS_CMD_ATTR_DEST], - need_full_dest); - if (ret) - goto out; - } - - switch (cmd) { - case IPVS_CMD_NEW_SERVICE: - if (svc == NULL) - ret = ip_vs_add_service(&usvc, &svc); - else - ret = -EEXIST; - break; - case IPVS_CMD_SET_SERVICE: - ret = ip_vs_edit_service(svc, &usvc); - break; - case IPVS_CMD_DEL_SERVICE: - ret = ip_vs_del_service(svc); - break; - case IPVS_CMD_NEW_DEST: - ret = ip_vs_add_dest(svc, &udest); - break; - case IPVS_CMD_SET_DEST: - ret = ip_vs_edit_dest(svc, &udest); - break; - case IPVS_CMD_DEL_DEST: - ret = ip_vs_del_dest(svc, &udest); - break; - case IPVS_CMD_ZERO: - ret = ip_vs_zero_service(svc); - break; - default: - ret = -EINVAL; - } - -out: - if (svc) - ip_vs_service_put(svc); - mutex_unlock(&__ip_vs_mutex); - - return ret; -} - -static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info) -{ - struct sk_buff *msg; - void *reply; - int ret, cmd, reply_cmd; - - cmd = info->genlhdr->cmd; - - if (cmd == IPVS_CMD_GET_SERVICE) - reply_cmd = IPVS_CMD_NEW_SERVICE; - else if (cmd == IPVS_CMD_GET_INFO) - reply_cmd = IPVS_CMD_SET_INFO; - else if (cmd == IPVS_CMD_GET_CONFIG) - reply_cmd = IPVS_CMD_SET_CONFIG; - else { - IP_VS_ERR("unknown Generic Netlink command\n"); - return -EINVAL; - } - - msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); - if (!msg) - return -ENOMEM; - - mutex_lock(&__ip_vs_mutex); - - reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd); - if (reply == NULL) - goto nla_put_failure; - - switch (cmd) { - case IPVS_CMD_GET_SERVICE: - { - struct ip_vs_service *svc; - - svc = ip_vs_genl_find_service(info->attrs[IPVS_CMD_ATTR_SERVICE]); - if (IS_ERR(svc)) { - ret = PTR_ERR(svc); - goto out_err; - } else if (svc) { - ret = ip_vs_genl_fill_service(msg, svc); - ip_vs_service_put(svc); - if (ret) - goto nla_put_failure; - } else { - ret = -ESRCH; - goto out_err; - } - - break; - } - - case IPVS_CMD_GET_CONFIG: - { - struct ip_vs_timeout_user t; - - __ip_vs_get_timeouts(&t); -#ifdef CONFIG_IP_VS_PROTO_TCP - NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP, t.tcp_timeout); - NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN, - t.tcp_fin_timeout); -#endif -#ifdef CONFIG_IP_VS_PROTO_UDP - NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout); -#endif - - break; - } - - case IPVS_CMD_GET_INFO: - NLA_PUT_U32(msg, IPVS_INFO_ATTR_VERSION, IP_VS_VERSION_CODE); - NLA_PUT_U32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE, - IP_VS_CONN_TAB_SIZE); - break; - } - - genlmsg_end(msg, reply); - ret = genlmsg_unicast(msg, info->snd_pid); - goto out; - -nla_put_failure: - IP_VS_ERR("not enough space in Netlink message\n"); - ret = -EMSGSIZE; - -out_err: - nlmsg_free(msg); -out: - mutex_unlock(&__ip_vs_mutex); - - return ret; -} - - -static struct genl_ops ip_vs_genl_ops[] __read_mostly = { - { - .cmd = IPVS_CMD_NEW_SERVICE, - .flags = GENL_ADMIN_PERM, - .policy = ip_vs_cmd_policy, - .doit = ip_vs_genl_set_cmd, - }, - { - .cmd = IPVS_CMD_SET_SERVICE, - .flags = GENL_ADMIN_PERM, - .policy = ip_vs_cmd_policy, - .doit = ip_vs_genl_set_cmd, - }, - { - .cmd = IPVS_CMD_DEL_SERVICE, - .flags = GENL_ADMIN_PERM, - .policy = ip_vs_cmd_policy, - .doit = ip_vs_genl_set_cmd, - }, - { - .cmd = IPVS_CMD_GET_SERVICE, - .flags = GENL_ADMIN_PERM, - .doit = ip_vs_genl_get_cmd, - .dumpit = ip_vs_genl_dump_services, - .policy = ip_vs_cmd_policy, - }, - { - .cmd = IPVS_CMD_NEW_DEST, - .flags = GENL_ADMIN_PERM, - .policy = ip_vs_cmd_policy, - .doit = ip_vs_genl_set_cmd, - }, - { - .cmd = IPVS_CMD_SET_DEST, - .flags = GENL_ADMIN_PERM, - .policy = ip_vs_cmd_policy, - .doit = ip_vs_genl_set_cmd, - }, - { - .cmd = IPVS_CMD_DEL_DEST, - .flags = GENL_ADMIN_PERM, - .policy = ip_vs_cmd_policy, - .doit = ip_vs_genl_set_cmd, - }, - { - .cmd = IPVS_CMD_GET_DEST, - .flags = GENL_ADMIN_PERM, - .policy = ip_vs_cmd_policy, - .dumpit = ip_vs_genl_dump_dests, - }, - { - .cmd = IPVS_CMD_NEW_DAEMON, - .flags = GENL_ADMIN_PERM, - .policy = ip_vs_cmd_policy, - .doit = ip_vs_genl_set_cmd, - }, - { - .cmd = IPVS_CMD_DEL_DAEMON, - .flags = GENL_ADMIN_PERM, - .policy = ip_vs_cmd_policy, - .doit = ip_vs_genl_set_cmd, - }, - { - .cmd = IPVS_CMD_GET_DAEMON, - .flags = GENL_ADMIN_PERM, - .dumpit = ip_vs_genl_dump_daemons, - }, - { - .cmd = IPVS_CMD_SET_CONFIG, - .flags = GENL_ADMIN_PERM, - .policy = ip_vs_cmd_policy, - .doit = ip_vs_genl_set_cmd, - }, - { - .cmd = IPVS_CMD_GET_CONFIG, - .flags = GENL_ADMIN_PERM, - .doit = ip_vs_genl_get_cmd, - }, - { - .cmd = IPVS_CMD_GET_INFO, - .flags = GENL_ADMIN_PERM, - .doit = ip_vs_genl_get_cmd, - }, - { - .cmd = IPVS_CMD_ZERO, - .flags = GENL_ADMIN_PERM, - .policy = ip_vs_cmd_policy, - .doit = ip_vs_genl_set_cmd, - }, - { - .cmd = IPVS_CMD_FLUSH, - .flags = GENL_ADMIN_PERM, - .doit = ip_vs_genl_set_cmd, - }, -}; - -static int __init ip_vs_genl_register(void) -{ - int ret, i; - - ret = genl_register_family(&ip_vs_genl_family); - if (ret) - return ret; - - for (i = 0; i < ARRAY_SIZE(ip_vs_genl_ops); i++) { - ret = genl_register_ops(&ip_vs_genl_family, &ip_vs_genl_ops[i]); - if (ret) - goto err_out; - } - return 0; - -err_out: - genl_unregister_family(&ip_vs_genl_family); - return ret; -} - -static void ip_vs_genl_unregister(void) -{ - genl_unregister_family(&ip_vs_genl_family); -} - -/* End of Generic Netlink interface definitions */ - - -int __init 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; - } - - ret = ip_vs_genl_register(); - if (ret) { - IP_VS_ERR("cannot register Generic Netlink interface.\n"); - nf_unregister_sockopt(&ip_vs_sockopts); - return ret; - } - - proc_net_fops_create(&init_net, "ip_vs", 0, &ip_vs_info_fops); - proc_net_fops_create(&init_net, "ip_vs_stats",0, &ip_vs_stats_fops); - - sysctl_header = register_sysctl_paths(net_vs_ctl_path, vs_vars); - - /* 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]); - } - - 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); - cancel_work_sync(&defense_work.work); - ip_vs_kill_estimator(&ip_vs_stats); - unregister_sysctl_table(sysctl_header); - proc_net_remove(&init_net, "ip_vs_stats"); - proc_net_remove(&init_net, "ip_vs"); - ip_vs_genl_unregister(); - nf_unregister_sockopt(&ip_vs_sockopts); - LeaveFunction(2); -} |