This source file includes following definitions.
- ip_vs_wlc_schedule
- ip_vs_wlc_init
- ip_vs_wlc_cleanup
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17 #define KMSG_COMPONENT "IPVS"
18 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
19
20 #include <linux/module.h>
21 #include <linux/kernel.h>
22
23 #include <net/ip_vs.h>
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27
28 static struct ip_vs_dest *
29 ip_vs_wlc_schedule(struct ip_vs_service *svc, const struct sk_buff *skb,
30 struct ip_vs_iphdr *iph)
31 {
32 struct ip_vs_dest *dest, *least;
33 int loh, doh;
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35 IP_VS_DBG(6, "ip_vs_wlc_schedule(): Scheduling...\n");
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50 list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
51 if (!(dest->flags & IP_VS_DEST_F_OVERLOAD) &&
52 atomic_read(&dest->weight) > 0) {
53 least = dest;
54 loh = ip_vs_dest_conn_overhead(least);
55 goto nextstage;
56 }
57 }
58 ip_vs_scheduler_err(svc, "no destination available");
59 return NULL;
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64 nextstage:
65 list_for_each_entry_continue_rcu(dest, &svc->destinations, n_list) {
66 if (dest->flags & IP_VS_DEST_F_OVERLOAD)
67 continue;
68 doh = ip_vs_dest_conn_overhead(dest);
69 if ((__s64)loh * atomic_read(&dest->weight) >
70 (__s64)doh * atomic_read(&least->weight)) {
71 least = dest;
72 loh = doh;
73 }
74 }
75
76 IP_VS_DBG_BUF(6, "WLC: server %s:%u "
77 "activeconns %d refcnt %d weight %d overhead %d\n",
78 IP_VS_DBG_ADDR(least->af, &least->addr),
79 ntohs(least->port),
80 atomic_read(&least->activeconns),
81 refcount_read(&least->refcnt),
82 atomic_read(&least->weight), loh);
83
84 return least;
85 }
86
87
88 static struct ip_vs_scheduler ip_vs_wlc_scheduler =
89 {
90 .name = "wlc",
91 .refcnt = ATOMIC_INIT(0),
92 .module = THIS_MODULE,
93 .n_list = LIST_HEAD_INIT(ip_vs_wlc_scheduler.n_list),
94 .schedule = ip_vs_wlc_schedule,
95 };
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98 static int __init ip_vs_wlc_init(void)
99 {
100 return register_ip_vs_scheduler(&ip_vs_wlc_scheduler);
101 }
102
103 static void __exit ip_vs_wlc_cleanup(void)
104 {
105 unregister_ip_vs_scheduler(&ip_vs_wlc_scheduler);
106 synchronize_rcu();
107 }
108
109 module_init(ip_vs_wlc_init);
110 module_exit(ip_vs_wlc_cleanup);
111 MODULE_LICENSE("GPL");