Commit message: ipvs: Add boundary check on ioctl arguments

The ipvs code has a nifty system for doing the size of ioctl command
copies; it defines an array with values into which it indexes the cmd
to find the right length.

Unfortunately, the ipvs code forgot to check if the cmd was in the
range that the array provides, allowing for an index outside of the
array, which then gives a "garbage" result into the length, which
then gets used for copying into a stack buffer.

Fix this by adding sanity checks on these as well as the copy size.

[ horms@verge.net.au: adjusted limit to IP_VS_SO_GET_MAX ]
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Patrick McHardy <kaber@trash.net>
CVE: CVE-2013-4588
CWE: CWE-119
Vulnerability description: Multiple stack-based buffer overflows in net/netfilter/ipvs/ip_vs_ctl.c in the Linux kernel before 2.6.33, when CONFIG_IP_VS is used, allow local users to gain privileges by leveraging the CAP_NET_ADMIN capability for (1) a getsockopt system call, related to the do_ip_vs_get_ctl function, or (2) a setsockopt system call, related to the do_ip_vs_set_ctl function.

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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);
	}
}

Project: linux
File: ip_vs_ctl.c

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();
}

Project: linux
File: ip_vs_ctl.c

__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;
}

Project: linux
File: ip_vs_ctl.c

__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;
}

Project: linux
File: ip_vs_ctl.c

__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
}

Project: linux
File: ip_vs_ctl.c

__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;
}

Project: linux
File: ip_vs_ctl.c

__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;
}

Project: linux
File: ip_vs_ctl.c

__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);
}

Project: linux
File: ip_vs_ctl.c

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);
}

Project: linux
File: ip_vs_ctl.c

__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;
}

Project: linux
File: ip_vs_ctl.c

__releases(__ip_vs_svc_lock)
{
	read_unlock_bh(&__ip_vs_svc_lock);
}

Project: linux
File: ip_vs_ctl.c

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);
}

Project: linux
File: ip_vs_ctl.c

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) {
		pr_err("%s(): server weight less than zero\n", __func__);
		return -ERANGE;
	}

	if (udest->l_threshold > udest->u_threshold) {
		pr_err("%s(): lower threshold is higher than upper threshold\n",
			__func__);
		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, "%s(): dest already exists\n", __func__);
		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;
}

Project: linux
File: ip_vs_ctl.c

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) {
		pr_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 && (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, "%s(): no memory\n", __func__);
		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;
}

Project: linux
File: ip_vs_ctl.c

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);
}

Project: linux
File: ip_vs_ctl.c

int __init ip_vs_control_init(void)
{
	int ret;
	int idx;

	EnterFunction(2);

	ret = nf_register_sockopt(&ip_vs_sockopts);
	if (ret) {
		pr_err("cannot register sockopt.\n");
		return ret;
	}

	ret = ip_vs_genl_register();
	if (ret) {
		pr_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;
}

Project: linux
File: ip_vs_ctl.c

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);
}

Project: linux
File: ip_vs_ctl.c

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);
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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, "%s(): destination not found!\n", __func__);
		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;
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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) {
		pr_err("%s(): server weight less than zero\n", __func__);
		return -ERANGE;
	}

	if (udest->l_threshold > udest->u_threshold) {
		pr_err("%s(): lower threshold is higher than upper threshold\n",
			__func__);
		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, "%s(): dest doesn't exist\n", __func__);
		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;
}

Project: linux
File: ip_vs_ctl.c

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) {
		pr_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 && (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);
#ifdef CONFIG_IP_VS_IPV6
  out:
#endif

	if (old_sched)
		ip_vs_scheduler_put(old_sched);

	return ret;
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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";
	}
}

Project: linux
File: ip_vs_ctl.c

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]));
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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);
}

Project: linux
File: ip_vs_ctl.c

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 {
		pr_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_reply(msg, info);
	goto out;

nla_put_failure:
	pr_err("not enough space in Netlink message\n");
	ret = -EMSGSIZE;

out_err:
	nlmsg_free(msg);
out:
	mutex_unlock(&__ip_vs_mutex);

	return ret;
}

Project: linux
File: ip_vs_ctl.c

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]));
}

Project: linux
File: ip_vs_ctl.c

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;

	memset(udest, 0, sizeof(*udest));

	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;
}

Project: linux
File: ip_vs_ctl.c

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;

	memset(usvc, 0, sizeof(*usvc));

	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;
}

Project: linux
File: ip_vs_ctl.c

static int __init ip_vs_genl_register(void)
{
	return genl_register_family_with_ops(&ip_vs_genl_family,
		ip_vs_genl_ops, ARRAY_SIZE(ip_vs_genl_ops));
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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);
}

Project: linux
File: ip_vs_ctl.c

static void ip_vs_genl_unregister(void)
{
	genl_unregister_family(&ip_vs_genl_family);
}

Project: linux
File: ip_vs_ctl.c

int ip_vs_get_debug_level(void)
{
	return sysctl_ip_vs_debug_level;
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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));
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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  [%pI6]:%04X %s ",
					   ip_vs_proto_name(svc->protocol),
					   &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,
					   "  -> [%pI6]:%04X"
					   "      %-7s %-6d %-10d %-10d\n",
					   &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;
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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) {
		pr_err("%s(): no memory.\n", __func__);
		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;
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

static int ip_vs_stats_seq_open(struct inode *inode, struct file *file)
{
	return single_open(file, ip_vs_stats_show, NULL);
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

static __inline__ unsigned ip_vs_svc_fwm_hashkey(__u32 fwmark)
{
	return fwmark & IP_VS_SVC_TAB_MASK;
}

Project: linux
File: ip_vs_ctl.c

static int ip_vs_svc_hash(struct ip_vs_service *svc)
{
	unsigned hash;

	if (svc->flags & IP_VS_SVC_F_HASHED) {
		pr_err("%s(): request for already hashed, called from %pF\n",
		       __func__, __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;
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

static int ip_vs_svc_unhash(struct ip_vs_service *svc)
{
	if (!(svc->flags & IP_VS_SVC_F_HASHED)) {
		pr_err("%s(): request for unhash flagged, called from %pF\n",
		       __func__, __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;
}

Project: linux
File: ip_vs_ctl.c

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);
	}
}

Project: linux
File: ip_vs_ctl.c

ip_vs_use_count_dec(void)
{
	module_put(THIS_MODULE);
}

Project: linux
File: ip_vs_ctl.c

ip_vs_use_count_inc(void)
{
	return try_module_get(THIS_MODULE);
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

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;
}

Project: linux
File: ip_vs_ctl.c

proc_do_defense_mode(ctl_table *table, int write,
		     void __user *buffer, size_t *lenp, loff_t *ppos)
{
	int *valp = table->data;
	int val = *valp;
	int rc;

	rc = proc_dointvec(table, write, buffer, lenp, ppos);
	if (write && (*valp != val)) {
		if ((*valp < 0) || (*valp > 3)) {
			/* Restore the correct value */
			*valp = val;
		} else {
			update_defense_level();
		}
	}
	return rc;
}

Project: linux
File: ip_vs_ctl.c

proc_do_sync_threshold(ctl_table *table, int write,
		       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, 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;
}