[PATCH 04/22] IPVS: netns awarness to lblc sheduler

[Simon Horman <horms@xxxxxxxxxxxx>]

From: Hans Schillstrom <hans.schillstrom@xxxxxxxxxxxx>

var sysctl_ip_vs_lblc_expiration moved to ipvs struct as
    sysctl_lblc_expiration

procfs updated to handle this.

Signed-off-by: Hans Schillstrom <hans.schillstrom@xxxxxxxxxxxx>
Acked-by: Julian Anastasov <ja@xxxxxx>
Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>
---
 include/net/netns/ip_vs.h       |    4 +++
 net/netfilter/ipvs/ip_vs_lblc.c |   50 ++++++++++++++++++++++++++------------
 2 files changed, 38 insertions(+), 16 deletions(-)

diff --git a/include/net/netns/ip_vs.h b/include/net/netns/ip_vs.h
index 51a92ee..d14581c 100644
--- a/include/net/netns/ip_vs.h
+++ b/include/net/netns/ip_vs.h
@@ -29,6 +29,10 @@ struct netns_ipvs {
 
        struct list_head        rs_table[IP_VS_RTAB_SIZE];
 
+       /* ip_vs_lblc */
+       int                     sysctl_lblc_expiration;
+       struct ctl_table_header *lblc_ctl_header;
+       struct ctl_table        *lblc_ctl_table;
        /* ip_vs_lblcr */
        int                     sysctl_lblcr_expiration;
        struct ctl_table_header *lblcr_ctl_header;
diff --git a/net/netfilter/ipvs/ip_vs_lblc.c b/net/netfilter/ipvs/ip_vs_lblc.c
index 84278fb..d5bec33 100644
--- a/net/netfilter/ipvs/ip_vs_lblc.c
+++ b/net/netfilter/ipvs/ip_vs_lblc.c
@@ -70,7 +70,6 @@
  *    entries that haven't been touched for a day.
  */
 #define COUNT_FOR_FULL_EXPIRATION   30
-static int sysctl_ip_vs_lblc_expiration = 24*60*60*HZ;
 
 
 /*
@@ -117,7 +116,7 @@ struct ip_vs_lblc_table {
 static ctl_table vs_vars_table[] = {
        {
                .procname       = "lblc_expiration",
-               .data           = &sysctl_ip_vs_lblc_expiration,
+               .data           = NULL,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = proc_dointvec_jiffies,
@@ -125,8 +124,6 @@ static ctl_table vs_vars_table[] = {
        { }
 };
 
-static struct ctl_table_header * sysctl_header;
-
 static inline void ip_vs_lblc_free(struct ip_vs_lblc_entry *en)
 {
        list_del(&en->list);
@@ -248,6 +245,7 @@ static inline void ip_vs_lblc_full_check(struct 
ip_vs_service *svc)
        struct ip_vs_lblc_entry *en, *nxt;
        unsigned long now = jiffies;
        int i, j;
+       struct netns_ipvs *ipvs = net_ipvs(svc->net);
 
        for (i=0, j=tbl->rover; i<IP_VS_LBLC_TAB_SIZE; i++) {
                j = (j + 1) & IP_VS_LBLC_TAB_MASK;
@@ -255,7 +253,8 @@ static inline void ip_vs_lblc_full_check(struct 
ip_vs_service *svc)
                write_lock(&svc->sched_lock);
                list_for_each_entry_safe(en, nxt, &tbl->bucket[j], list) {
                        if (time_before(now,
-                                       en->lastuse + 
sysctl_ip_vs_lblc_expiration))
+                                       en->lastuse +
+                                       ipvs->sysctl_lblc_expiration))
                                continue;
 
                        ip_vs_lblc_free(en);
@@ -548,23 +547,43 @@ static struct ip_vs_scheduler ip_vs_lblc_scheduler =
  */
 static int __net_init __ip_vs_lblc_init(struct net *net)
 {
-       if (!net_eq(net, &init_net))    /* netns not enabled yet */
-               return -EPERM;
-
-       sysctl_header = register_net_sysctl_table(net, net_vs_ctl_path,
-                                                 vs_vars_table);
-       if (!sysctl_header)
-               return -ENOMEM;
+       struct netns_ipvs *ipvs = net_ipvs(net);
+
+       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)
+                       goto err_dup;
+       } else
+               ipvs->lblc_ctl_table = vs_vars_table;
+       ipvs->sysctl_lblc_expiration = 24*60*60*HZ;
+       ipvs->lblc_ctl_table[0].data = &ipvs->sysctl_lblc_expiration;
+
+       ipvs->lblc_ctl_header =
+               register_net_sysctl_table(net, net_vs_ctl_path,
+                                         ipvs->lblc_ctl_table);
+       if (!ipvs->lblc_ctl_header)
+               goto err_reg;
 
        return 0;
+
+err_reg:
+       if (!net_eq(net, &init_net))
+               kfree(ipvs->lblc_ctl_table);
+
+err_dup:
+       return -ENOMEM;
 }
 
 static void __net_exit __ip_vs_lblc_exit(struct net *net)
 {
-       if (!net_eq(net, &init_net))    /* netns not enabled yet */
-               return;
+       struct netns_ipvs *ipvs = net_ipvs(net);
+
+       unregister_net_sysctl_table(ipvs->lblc_ctl_header);
 
-       unregister_net_sysctl_table(sysctl_header);
+       if (!net_eq(net, &init_net))
+               kfree(ipvs->lblc_ctl_table);
 }
 
 static struct pernet_operations ip_vs_lblc_ops = {
@@ -586,7 +605,6 @@ static int __init ip_vs_lblc_init(void)
        return ret;
 }
 
-
 static void __exit ip_vs_lblc_cleanup(void)
 {
        unregister_ip_vs_scheduler(&ip_vs_lblc_scheduler);
-- 
1.7.2.3

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