Release 4.8 net/netfilter/ipvs/ip_vs_lblc.c

/*
 * IPVS:        Locality-Based Least-Connection scheduling module
 *
 * Authors:     Wensong Zhang <wensong@gnuchina.org>
 *
 *              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:
 *     Martin Hamilton         :    fixed the terrible locking bugs
 *                                   *lock(tbl->lock) ==> *lock(&tbl->lock)
 *     Wensong Zhang           :    fixed the uninitialized tbl->lock bug
 *     Wensong Zhang           :    added doing full expiration check to
 *                                   collect stale entries of 24+ hours when
 *                                   no partial expire check in a half hour
 *     Julian Anastasov        :    replaced del_timer call with del_timer_sync
 *                                   to avoid the possible race between timer
 *                                   handler and del_timer thread in SMP
 *
 */

/*
 * The lblc algorithm is as follows (pseudo code):
 *
 *       if cachenode[dest_ip] is null then
 *               n, cachenode[dest_ip] <- {weighted least-conn node};
 *       else
 *               n <- cachenode[dest_ip];
 *               if (n is dead) OR
 *                  (n.conns>n.weight AND
 *                   there is a node m with m.conns<m.weight/2) then
 *                 n, cachenode[dest_ip] <- {weighted least-conn node};
 *
 *       return n;
 *
 * Thanks must go to Wenzhuo Zhang for talking WCCP to me and pushing
 * me to write this module.
 */


#define KMSG_COMPONENT "IPVS"

#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt

#include <linux/ip.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <linux/jiffies.h>

/* for sysctl */
#include <linux/fs.h>
#include <linux/sysctl.h>

#include <net/ip_vs.h>


/*
 *    It is for garbage collection of stale IPVS lblc entries,
 *    when the table is full.
 */

#define CHECK_EXPIRE_INTERVAL   (60*HZ)

#define ENTRY_TIMEOUT           (6*60*HZ)


#define DEFAULT_EXPIRATION	(24*60*60*HZ)

/*
 *    It is for full expiration check.
 *    When there is no partial expiration check (garbage collection)
 *    in a half hour, do a full expiration check to collect stale
 *    entries that haven't been touched for a day.
 */

#define COUNT_FOR_FULL_EXPIRATION   30


/*
 *     for IPVS lblc entry hash table
 */
#ifndef CONFIG_IP_VS_LBLC_TAB_BITS

#define CONFIG_IP_VS_LBLC_TAB_BITS      10
#endif

#define IP_VS_LBLC_TAB_BITS     CONFIG_IP_VS_LBLC_TAB_BITS

#define IP_VS_LBLC_TAB_SIZE     (1 << IP_VS_LBLC_TAB_BITS)

#define IP_VS_LBLC_TAB_MASK     (IP_VS_LBLC_TAB_SIZE - 1)


/*
 *      IPVS lblc entry represents an association between destination
 *      IP address and its destination server
 */

struct ip_vs_lblc_entry {
	
struct hlist_node	list;
	
int			af;		/* address family */
	
union nf_inet_addr      addr;           /* destination IP address */
	
struct ip_vs_dest	*dest;          /* real server (cache) */
	
unsigned long           lastuse;        /* last used time */
	
struct rcu_head		rcu_head;
};


/*
 *      IPVS lblc hash table
 */

struct ip_vs_lblc_table {
	
struct rcu_head		rcu_head;
	
struct hlist_head	bucket[IP_VS_LBLC_TAB_SIZE];  /* hash bucket */
	
struct timer_list       periodic_timer; /* collect stale entries */
	
atomic_t                entries;        /* number of entries */
	
int                     max_size;       /* maximum size of entries */
	
int                     rover;          /* rover for expire check */
	
int                     counter;        /* counter for no expire */
	
bool			dead;
};


/*
 *      IPVS LBLC sysctl table
 */
#ifdef CONFIG_SYSCTL

static struct ctl_table vs_vars_table[] = {
	{
		.procname	= "lblc_expiration",
		.data		= NULL,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_jiffies,
        },
	{ }
};
#endif



static void ip_vs_lblc_rcu_free(struct rcu_head *head)
{
	struct ip_vs_lblc_entry *en = container_of(head,
						   struct ip_vs_lblc_entry,
						   rcu_head);

	ip_vs_dest_put_and_free(en->dest);
	kfree(en);
}

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julian anastasov
julian anastasov
24
63.16%
3
75.00%
wensong zhang
wensong zhang
14
36.84%
1
25.00%
Total
38
100.00%
4
100.00%



static inline void ip_vs_lblc_del(struct ip_vs_lblc_entry *en)
{
	hlist_del_rcu(&en->list);
	call_rcu(&en->rcu_head, ip_vs_lblc_rcu_free);
}

Contributors
Person
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CommitProp
julian anastasov
julian anastasov
23
76.67%
2
66.67%
wensong zhang
wensong zhang
7
23.33%
1
33.33%
Total
30
100.00%
3
100.00%

/*
 *      Returns hash value for IPVS LBLC entry
 */

static inline unsigned int

ip_vs_lblc_hashkey(int af, const union nf_inet_addr *addr)
{
	__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)*2654435761UL) & IP_VS_LBLC_TAB_MASK;
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
julius volz
julius volz
56
72.73%
1
33.33%
wensong zhang
wensong zhang
20
25.97%
1
33.33%
eric dumazet
eric dumazet
1
1.30%
1
33.33%
Total
77
100.00%
3
100.00%

/*
 *      Hash an entry in the ip_vs_lblc_table.
 *      returns bool success.
 */

static void

ip_vs_lblc_hash(struct ip_vs_lblc_table *tbl, struct ip_vs_lblc_entry *en)
{
	unsigned int hash = ip_vs_lblc_hashkey(en->af, &en->addr);

	hlist_add_head_rcu(&en->list, &tbl->bucket[hash]);
	atomic_inc(&tbl->entries);
}


Contributors
Person
Tokens
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CommitProp
wensong zhang
wensong zhang
46
82.14%
1
20.00%
julius volz
julius volz
5
8.93%
1
20.00%
sven wegener
sven wegener
3
5.36%
1
20.00%
julian anastasov
julian anastasov
1
1.79%
1
20.00%
eric dumazet
eric dumazet
1
1.79%
1
20.00%
Total
56
100.00%
5
100.00%

/* Get ip_vs_lblc_entry associated with supplied parameters. */

static inline struct ip_vs_lblc_entry *

ip_vs_lblc_get(int af, struct ip_vs_lblc_table *tbl,
	       const union nf_inet_addr *addr)
{
	unsigned int hash = ip_vs_lblc_hashkey(af, addr);
	struct ip_vs_lblc_entry *en;

	hlist_for_each_entry_rcu(en, &tbl->bucket[hash], list)
		if (ip_vs_addr_equal(af, &en->addr, addr))
			return en;

	return NULL;
}


Contributors
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wensong zhang
wensong zhang
34
50.75%
1
16.67%
julius volz
julius volz
16
23.88%
1
16.67%
sven wegener
sven wegener
12
17.91%
1
16.67%
stephen hemminger
stephen hemminger
3
4.48%
1
16.67%
julian anastasov
julian anastasov
1
1.49%
1
16.67%
eric dumazet
eric dumazet
1
1.49%
1
16.67%
Total
67
100.00%
6
100.00%

/*
 * Create or update an ip_vs_lblc_entry, which is a mapping of a destination IP
 * address to a server. Called under spin lock.
 */

static inline struct ip_vs_lblc_entry *

ip_vs_lblc_new(struct ip_vs_lblc_table *tbl, const union nf_inet_addr *daddr,
	       u16 af, struct ip_vs_dest *dest)
{
	struct ip_vs_lblc_entry *en;

	en = ip_vs_lblc_get(af, tbl, daddr);
	if (en) {
		if (en->dest == dest)
			return en;
		ip_vs_lblc_del(en);
	}
	en = kmalloc(sizeof(*en), GFP_ATOMIC);
	if (!en)
		return NULL;

	en->af = af;
	ip_vs_addr_copy(af, &en->addr, daddr);
	en->lastuse = jiffies;

	ip_vs_dest_hold(dest);
	en->dest = dest;

	ip_vs_lblc_hash(tbl, en);

	return en;
}


Contributors
Person
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sven wegener
sven wegener
79
59.85%
1
16.67%
julian anastasov
julian anastasov
22
16.67%
3
50.00%
julius volz
julius volz
19
14.39%
1
16.67%
wensong zhang
wensong zhang
12
9.09%
1
16.67%
Total
132
100.00%
6
100.00%

/*
 *      Flush all the entries of the specified table.
 */


static void ip_vs_lblc_flush(struct ip_vs_service *svc)
{
	struct ip_vs_lblc_table *tbl = svc->sched_data;
	struct ip_vs_lblc_entry *en;
	struct hlist_node *next;
	int i;

	spin_lock_bh(&svc->sched_lock);
	tbl->dead = 1;
	for (i = 0; i < IP_VS_LBLC_TAB_SIZE; i++) {
		hlist_for_each_entry_safe(en, next, &tbl->bucket[i], list) {
			ip_vs_lblc_del(en);
			atomic_dec(&tbl->entries);
		}
	}
	spin_unlock_bh(&svc->sched_lock);
}

Contributors
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wensong zhang
wensong zhang
46
48.42%
1
16.67%
julian anastasov
julian anastasov
40
42.11%
3
50.00%
stephen hemminger
stephen hemminger
6
6.32%
1
16.67%
sven wegener
sven wegener
3
3.16%
1
16.67%
Total
95
100.00%
6
100.00%



static int sysctl_lblc_expiration(struct ip_vs_service *svc)
{
#ifdef CONFIG_SYSCTL
	return svc->ipvs->sysctl_lblc_expiration;
#else
	return DEFAULT_EXPIRATION;
#endif
}

Contributors
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simon horman
simon horman
27
96.43%
1
50.00%
eric w. biederman
eric w. biederman
1
3.57%
1
50.00%
Total
28
100.00%
2
100.00%



static inline void ip_vs_lblc_full_check(struct ip_vs_service *svc)
{
	struct ip_vs_lblc_table *tbl = svc->sched_data;
	struct ip_vs_lblc_entry *en;
	struct hlist_node *next;
	unsigned long now = jiffies;
	int i, j;

	for (i = 0, j = tbl->rover; i < IP_VS_LBLC_TAB_SIZE; i++) {
		j = (j + 1) & IP_VS_LBLC_TAB_MASK;

		spin_lock(&svc->sched_lock);
		hlist_for_each_entry_safe(en, next, &tbl->bucket[j], list) {
			if (time_before(now,
					en->lastuse +
					sysctl_lblc_expiration(svc)))
				continue;

			ip_vs_lblc_del(en);
			atomic_dec(&tbl->entries);
		}
		spin_unlock(&svc->sched_lock);
	}
	tbl->rover = j;
}


Contributors
Person
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wensong zhang
wensong zhang
91
66.42%
1
11.11%
sven wegener
sven wegener
23
16.79%
1
11.11%
stephen hemminger
stephen hemminger
10
7.30%
2
22.22%
julian anastasov
julian anastasov
9
6.57%
3
33.33%
simon horman
simon horman
3
2.19%
1
11.11%
hans schillstrom
hans schillstrom
1
0.73%
1
11.11%
Total
137
100.00%
9
100.00%

/*
 *      Periodical timer handler for IPVS lblc table
 *      It is used to collect stale entries when the number of entries
 *      exceeds the maximum size of the table.
 *
 *      Fixme: we probably need more complicated algorithm to collect
 *             entries that have not been used for a long time even
 *             if the number of entries doesn't exceed the maximum size
 *             of the table.
 *      The full expiration check is for this purpose now.
 */


static void ip_vs_lblc_check_expire(unsigned long data)
{
	struct ip_vs_service *svc = (struct ip_vs_service *) data;
	struct ip_vs_lblc_table *tbl = svc->sched_data;
	unsigned long now = jiffies;
	int goal;
	int i, j;
	struct ip_vs_lblc_entry *en;
	struct hlist_node *next;

	if ((tbl->counter % COUNT_FOR_FULL_EXPIRATION) == 0) {
		/* do full expiration check */
		ip_vs_lblc_full_check(svc);
		tbl->counter = 1;
		goto out;
	}

	if (atomic_read(&tbl->entries) <= tbl->max_size) {
		tbl->counter++;
		goto out;
	}

	goal = (atomic_read(&tbl->entries) - tbl->max_size)*4/3;
	if (goal > tbl->max_size/2)
		goal = tbl->max_size/2;

	for (i = 0, j = tbl->rover; i < IP_VS_LBLC_TAB_SIZE; i++) {
		j = (j + 1) & IP_VS_LBLC_TAB_MASK;

		spin_lock(&svc->sched_lock);
		hlist_for_each_entry_safe(en, next, &tbl->bucket[j], list) {
			if (time_before(now, en->lastuse + ENTRY_TIMEOUT))
				continue;

			ip_vs_lblc_del(en);
			atomic_dec(&tbl->entries);
			goal--;
		}
		spin_unlock(&svc->sched_lock);
		if (goal <= 0)
			break;
	}
	tbl->rover = j;

  out:
	mod_timer(&tbl->periodic_timer, jiffies + CHECK_EXPIRE_INTERVAL);
}


Contributors
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wensong zhang
wensong zhang
221
84.35%
1
14.29%
sven wegener
sven wegener
21
8.02%
1
14.29%
stephen hemminger
stephen hemminger
11
4.20%
2
28.57%
julian anastasov
julian anastasov
9
3.44%
3
42.86%
Total
262
100.00%
7
100.00%



static int ip_vs_lblc_init_svc(struct ip_vs_service *svc)
{
	int i;
	struct ip_vs_lblc_table *tbl;

	/*
         *    Allocate the ip_vs_lblc_table for this service
         */
	tbl = kmalloc(sizeof(*tbl), GFP_KERNEL);
	if (tbl == NULL)
		return -ENOMEM;

	svc->sched_data = tbl;
	IP_VS_DBG(6, "LBLC hash table (memory=%Zdbytes) allocated for "
		  "current service\n", sizeof(*tbl));

	/*
         *    Initialize the hash buckets
         */
	for (i = 0; i < IP_VS_LBLC_TAB_SIZE; i++) {
		INIT_HLIST_HEAD(&tbl->bucket[i]);
	}
	tbl->max_size = IP_VS_LBLC_TAB_SIZE*16;
	tbl->rover = 0;
	tbl->counter = 1;
	tbl->dead = 0;

	/*
         *    Hook periodic timer for garbage collection
         */
	setup_timer(&tbl->periodic_timer, ip_vs_lblc_check_expire,
			(unsigned long)svc);
	mod_timer(&tbl->periodic_timer, jiffies + CHECK_EXPIRE_INTERVAL);

	return 0;
}


Contributors
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CommitProp
wensong zhang
wensong zhang
125
84.46%
1
16.67%
sven wegener
sven wegener
9
6.08%
1
16.67%
julian anastasov
julian anastasov
8
5.41%
2
33.33%
pavel emelianov
pavel emelianov
5
3.38%
1
16.67%
randy dunlap
randy dunlap
1
0.68%
1
16.67%
Total
148
100.00%
6
100.00%



static void ip_vs_lblc_done_svc(struct ip_vs_service *svc)
{
	struct ip_vs_lblc_table *tbl = svc->sched_data;

	/* remove periodic timer */
	del_timer_sync(&tbl->periodic_timer);

	/* got to clean up table entries here */
	ip_vs_lblc_flush(svc);

	/* release the table itself */
	kfree_rcu(tbl, rcu_head);
	IP_VS_DBG(6, "LBLC hash table (memory=%Zdbytes) released\n",
		  sizeof(*tbl));
}


Contributors
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CommitProp
wensong zhang
wensong zhang
47
83.93%
1
20.00%
julian anastasov
julian anastasov
5
8.93%
2
40.00%
sven wegener
sven wegener
3
5.36%
1
20.00%
randy dunlap
randy dunlap
1
1.79%
1
20.00%
Total
56
100.00%
5
100.00%


static inline struct ip_vs_dest *

__ip_vs_lblc_schedule(struct ip_vs_service *svc)
{
	struct ip_vs_dest *dest, *least;
	int loh, doh;

	/*
         * We use the following formula to estimate the load:
         *                (dest overhead) / dest->weight
         *
         * Remember -- no floats in kernel mode!!!
         * The comparison of h1*w2 > h2*w1 is equivalent to that of
         *                h1/w1 > h2/w2
         * if every weight is larger than zero.
         *
         * The server with weight=0 is quiesced and will not receive any
         * new connection.
         */
	list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
		if (dest->flags & IP_VS_DEST_F_OVERLOAD)
			continue;
		if (atomic_read(&dest->weight) > 0) {
			least = dest;
			loh = ip_vs_dest_conn_overhead(least);
			goto nextstage;
		}
	}
	return NULL;

	/*
         *    Find the destination with the least load.
         */
  nextstage:
	list_for_each_entry_continue_rcu(dest, &svc->destinations, n_list) {
		if (dest->flags & IP_VS_DEST_F_OVERLOAD)
			continue;

		doh = ip_vs_dest_conn_overhead(dest);
		if ((__s64)loh * atomic_read(&dest->weight) >
		    (__s64)doh * atomic_read(&least->weight)) {
			least = dest;
			loh = doh;
		}
	}

	IP_VS_DBG_BUF(6, "LBLC: server %s:%d "
		      "activeconns %d refcnt %d weight %d overhead %d\n",
		      IP_VS_DBG_ADDR(least->af, &least->addr),
		      ntohs(least->port),
		      atomic_read(&least->activeconns),
		      atomic_read(&least->refcnt),
		      atomic_read(&least->weight), loh);

	return least;
}


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wensong zhang
wensong zhang
165
82.09%
1
11.11%
julius volz
julius volz
9
4.48%
1
11.11%
julian anastasov
julian anastasov
9
4.48%
2
22.22%
stephen hemminger
stephen hemminger
7
3.48%
1
11.11%
simon kirby
simon kirby
6
2.99%
1
11.11%
changli gao
changli gao
3
1.49%
1
11.11%
simon horman
simon horman
1
0.50%
1
11.11%
harvey harrison
harvey harrison
1
0.50%
1
11.11%
Total
201
100.00%
9
100.00%

/*
 *   If this destination server is overloaded and there is a less loaded
 *   server, then return true.
 */

static inline int

is_overloaded(struct ip_vs_dest *dest, struct ip_vs_service *svc)
{
	if (atomic_read(&dest->activeconns) > atomic_read(&dest->weight)) {
		struct ip_vs_dest *d;

		list_for_each_entry_rcu(d, &svc->destinations, n_list) {
			if (atomic_read(&d->activeconns)*2
			    < atomic_read(&d->weight)) {
				return 1;
			}
		}
	}
	return 0;
}


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wensong zhang
wensong zhang
75
93.75%
1
33.33%
stephen hemminger
stephen hemminger
4
5.00%
1
33.33%
julian anastasov
julian anastasov
1
1.25%
1
33.33%
Total
80
100.00%
3
100.00%

/*
 *    Locality-Based (weighted) Least-Connection scheduling
 */

static struct ip_vs_dest *

ip_vs_lblc_schedule(struct ip_vs_service *svc, const struct sk_buff *skb,
		    struct ip_vs_iphdr *iph)
{
	struct ip_vs_lblc_table *tbl = svc->sched_data;
	struct ip_vs_dest *dest = NULL;
	struct ip_vs_lblc_entry *en;

	IP_VS_DBG(6, "%s(): Scheduling...\n", __func__);

	/* First look in our cache */
	en = ip_vs_lblc_get(svc->af, tbl, &iph->daddr);
	if (en) {
		/* We only hold a read lock, but this is atomic */
		en->lastuse = jiffies;

		/*
                 * If the destination is not available, i.e. it's in the trash,
                 * we must ignore it, as it may be removed from under our feet,
                 * if someone drops our reference count. Our caller only makes
                 * sure that destinations, that are not in the trash, are not
                 * moved to the trash, while we are scheduling. But anyone can
                 * free up entries from the trash at any time.
                 */

		dest = en->dest;
		if ((dest->flags & IP_VS_DEST_F_AVAILABLE) &&
		    atomic_read(&dest->weight) > 0 && !is_overloaded(dest, svc))
			goto out;
	}

	/* No cache entry or it is invalid, time to schedule */
	dest = __ip_vs_lblc_schedule(svc);
	if (!dest) {
		ip_vs_scheduler_err(svc, "no destination available");
		return NULL;
	}

	/* If we fail to create a cache entry, we'll just use the valid dest */
	spin_lock_bh(&svc->sched_lock);
	if (!tbl->dead)
		ip_vs_lblc_new(tbl, &iph->daddr, svc->af, dest);
	spin_unlock_bh(&svc->sched_lock);

out:
	IP_VS_DBG_BUF(6, "LBLC: destination IP address %s --> server %s:%d\n",
		      IP_VS_DBG_ADDR(svc->af, &iph->daddr),
		      IP_VS_DBG_ADDR(dest->af, &dest->addr), ntohs(dest->port));

	return dest;
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
wensong zhang
wensong zhang
115
50.00%
1
8.33%
sven wegener
sven wegener
51
22.17%
1
8.33%
julian anastasov
julian anastasov
33
14.35%
5
41.67%
julius volz
julius volz
21
9.13%
1
8.33%
patrick schaaf
patrick schaaf
4
1.74%
1
8.33%
hannes eder
hannes eder
3
1.30%
1
8.33%
harvey harrison
harvey harrison
2
0.87%
1
8.33%
simon horman
simon horman
1
0.43%
1
8.33%
Total
230
100.00%
12
100.00%

/*
 *      IPVS LBLC Scheduler structure
 */

static struct ip_vs_scheduler ip_vs_lblc_scheduler = {
	.name =			"lblc",
	.refcnt =		ATOMIC_INIT(0),
	.module =		THIS_MODULE,
	.n_list =		LIST_HEAD_INIT(ip_vs_lblc_scheduler.n_list),
	.init_service =		ip_vs_lblc_init_svc,
	.done_service =		ip_vs_lblc_done_svc,
	.schedule =		ip_vs_lblc_schedule,
};

/*
 *  per netns init.
 */
#ifdef CONFIG_SYSCTL


static int __net_init __ip_vs_lblc_init(struct net *net)
{
	struct netns_ipvs *ipvs = net_ipvs(net);

	if (!ipvs)
		return -ENOENT;

	if (!net_eq(net, &init_net)) {
		ipvs->lblc_ctl_table = kmemdup(vs_vars_table,
						sizeof(vs_vars_table),
						GFP_KERNEL);
		if (ipvs->lblc_ctl_table == NULL)
			return -ENOMEM;

		/* Don't export sysctls to unprivileged users */
		if (net->user_ns != &init_user_ns)
			ipvs->lblc_ctl_table[0].procname = NULL;

	} else
		ipvs->lblc_ctl_table = vs_vars_table;
	ipvs->sysctl_lblc_expiration = DEFAULT_EXPIRATION;
	ipvs->lblc_ctl_table[0].data = &ipvs->sysctl_lblc_expiration;

	ipvs->lblc_ctl_header =
		register_net_sysctl(net, "net/ipv4/vs", ipvs->lblc_ctl_table);
	if (!ipvs->lblc_ctl_header) {
		if (!net_eq(net, &init_net))
			kfree(ipvs->lblc_ctl_table);
		return -ENOMEM;
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hans schillstrom
hans schillstrom
136
80.47%
3
42.86%
eric w. biederman
eric w. biederman
23
13.61%
2
28.57%
simon horman
simon horman
10
5.92%
2
28.57%
Total
169
100.00%
7
100.00%



static void __net_exit __ip_vs_lblc_exit(struct net *net)
{
	struct netns_ipvs *ipvs = net_ipvs(net);

	unregister_net_sysctl_table(ipvs->lblc_ctl_header);

	if (!net_eq(net, &init_net))
		kfree(ipvs->lblc_ctl_table);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hans schillstrom
hans schillstrom
47
100.00%
2
100.00%
Total
47
100.00%
2
100.00%

#else



static int __net_init __ip_vs_lblc_init(struct net *net) { return 0; }
Contributors
Person
Tokens
Prop
Commits
CommitProp
simon horman
simon horman
15
100.00%
1
100.00%
Total
15
100.00%
1
100.00%



static void __net_exit __ip_vs_lblc_exit(struct net *net) { }

Contributors
Person
Tokens
Prop
Commits
CommitProp
simon horman
simon horman
11
100.00%
1
100.00%
Total
11
100.00%
1
100.00%

#endif


static struct pernet_operations ip_vs_lblc_ops = {
	.init = __ip_vs_lblc_init,
	.exit = __ip_vs_lblc_exit,
};



static int __init ip_vs_lblc_init(void)
{
	int ret;

	ret = register_pernet_subsys(&ip_vs_lblc_ops);
	if (ret)
		return ret;

	ret = register_ip_vs_scheduler(&ip_vs_lblc_scheduler);
	if (ret)
		unregister_pernet_subsys(&ip_vs_lblc_ops);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
wensong zhang
wensong zhang
19
39.58%
1
33.33%
pavel emelianov
pavel emelianov
15
31.25%
1
33.33%
hans schillstrom
hans schillstrom
14
29.17%
1
33.33%
Total
48
100.00%
3
100.00%



static void __exit ip_vs_lblc_cleanup(void)
{
	unregister_ip_vs_scheduler(&ip_vs_lblc_scheduler);
	unregister_pernet_subsys(&ip_vs_lblc_ops);
	rcu_barrier();
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
wensong zhang
wensong zhang
16
66.67%
1
25.00%
hans schillstrom
hans schillstrom
5
20.83%
1
25.00%
julian anastasov
julian anastasov
3
12.50%
2
50.00%
Total
24
100.00%
4
100.00%


module_init(ip_vs_lblc_init);

module_exit(ip_vs_lblc_cleanup);
MODULE_LICENSE("GPL");
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
wensong zhang
wensong zhang
1238
54.95%
2
4.35%
hans schillstrom
hans schillstrom
222
9.85%
3
6.52%
sven wegener
sven wegener
214
9.50%
2
4.35%
julian anastasov
julian anastasov
208
9.23%
12
26.09%
julius volz
julius volz
132
5.86%
1
2.17%
simon horman
simon horman
84
3.73%
4
8.70%
stephen hemminger
stephen hemminger
41
1.82%
2
4.35%
eric w. biederman
eric w. biederman
25
1.11%
4
8.70%
pavel emelianov
pavel emelianov
20
0.89%
2
4.35%
art haas
art haas
20
0.89%
1
2.17%
hannes eder
hannes eder
14
0.62%
2
4.35%
simon kirby
simon kirby
6
0.27%
1
2.17%
arnaldo carvalho de melo
arnaldo carvalho de melo
6
0.27%
1
2.17%
patrick schaaf
patrick schaaf
4
0.18%
1
2.17%
al viro
al viro
3
0.13%
1
2.17%
eric dumazet
eric dumazet
3
0.13%
1
2.17%
changli gao
changli gao
3
0.13%
1
2.17%
harvey harrison
harvey harrison
3
0.13%
1
2.17%
tejun heo
tejun heo
3
0.13%
1
2.17%
randy dunlap
randy dunlap
2
0.09%
1
2.17%
uwe kleine-koenig
uwe kleine-koenig
1
0.04%
1
2.17%
joe perches
joe perches
1
0.04%
1
2.17%
Total
2253
100.00%
46
100.00%
  
Directory: net/netfilter/ipvs

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