[PATCH 05/22] IPVS: netns, prepare protocol

[Simon Horman <horms@xxxxxxxxxxxx>]

From: Hans Schillstrom <hans.schillstrom@xxxxxxxxxxxx>

Add support for protocol data per name-space.
in struct ip_vs_protocol, appcnt will be removed when all protos
are modified for network name-space.

This patch causes warnings of unused functions, they will be used
when next patch will be applied.

Signed-off-by: Hans Schillstrom <hans.schillstrom@xxxxxxxxxxxx>
Acked-by: Julian Anastasov <ja@xxxxxx>
Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>
---
 include/net/ip_vs.h              |   20 +++++++++++-
 include/net/netns/ip_vs.h        |    3 ++
 net/netfilter/ipvs/ip_vs_proto.c |   66 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 88 insertions(+), 1 deletions(-)

diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index d551e0d..88d4e40 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -352,6 +352,7 @@ struct iphdr;
 struct ip_vs_conn;
 struct ip_vs_app;
 struct sk_buff;
+struct ip_vs_proto_data;
 
 struct ip_vs_protocol {
        struct ip_vs_protocol   *next;
@@ -366,6 +367,10 @@ struct ip_vs_protocol {
 
        void (*exit)(struct ip_vs_protocol *pp);
 
+       void (*init_netns)(struct net *net, struct ip_vs_proto_data *pd);
+
+       void (*exit_netns)(struct net *net, struct ip_vs_proto_data *pd);
+
        int (*conn_schedule)(int af, struct sk_buff *skb,
                             struct ip_vs_protocol *pp,
                             int *verdict, struct ip_vs_conn **cpp);
@@ -417,7 +422,20 @@ struct ip_vs_protocol {
        int (*set_state_timeout)(struct ip_vs_protocol *pp, char *sname, int 
to);
 };
 
-extern struct ip_vs_protocol * ip_vs_proto_get(unsigned short proto);
+/*
+ * protocol data per netns
+ */
+struct ip_vs_proto_data {
+       struct ip_vs_proto_data *next;
+       struct ip_vs_protocol   *pp;
+       int                     *timeout_table; /* protocol timeout table */
+       atomic_t                appcnt;         /* counter of proto app incs. */
+       struct tcp_states_t     *tcp_state_table;
+};
+
+extern struct ip_vs_protocol   *ip_vs_proto_get(unsigned short proto);
+extern struct ip_vs_proto_data *ip_vs_proto_data_get(struct net *net,
+                                                    unsigned short proto);
 
 struct ip_vs_conn_param {
        const union nf_inet_addr        *caddr;
diff --git a/include/net/netns/ip_vs.h b/include/net/netns/ip_vs.h
index d14581c..6f4e089 100644
--- a/include/net/netns/ip_vs.h
+++ b/include/net/netns/ip_vs.h
@@ -28,6 +28,9 @@ struct netns_ipvs {
        #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1)
 
        struct list_head        rs_table[IP_VS_RTAB_SIZE];
+       /* ip_vs_proto */
+       #define IP_VS_PROTO_TAB_SIZE    32      /* must be power of 2 */
+       struct ip_vs_proto_data *proto_data_table[IP_VS_PROTO_TAB_SIZE];
 
        /* ip_vs_lblc */
        int                     sysctl_lblc_expiration;
diff --git a/net/netfilter/ipvs/ip_vs_proto.c b/net/netfilter/ipvs/ip_vs_proto.c
index 4539294..576e296 100644
--- a/net/netfilter/ipvs/ip_vs_proto.c
+++ b/net/netfilter/ipvs/ip_vs_proto.c
@@ -60,6 +60,31 @@ static int __used __init register_ip_vs_protocol(struct 
ip_vs_protocol *pp)
        return 0;
 }
 
+/*
+ *     register an ipvs protocols netns related data
+ */
+static int
+register_ip_vs_proto_netns(struct net *net, struct ip_vs_protocol *pp)
+{
+       struct netns_ipvs *ipvs = net_ipvs(net);
+       unsigned hash = IP_VS_PROTO_HASH(pp->protocol);
+       struct ip_vs_proto_data *pd =
+                       kzalloc(sizeof(struct ip_vs_proto_data), GFP_ATOMIC);
+
+       if (!pd) {
+               pr_err("%s(): no memory.\n", __func__);
+               return -ENOMEM;
+       }
+       pd->pp = pp;    /* For speed issues */
+       pd->next = ipvs->proto_data_table[hash];
+       ipvs->proto_data_table[hash] = pd;
+       atomic_set(&pd->appcnt, 0);     /* Init app counter */
+
+       if (pp->init_netns != NULL)
+               pp->init_netns(net, pd);
+
+       return 0;
+}
 
 /*
  *     unregister an ipvs protocol
@@ -82,6 +107,29 @@ static int unregister_ip_vs_protocol(struct ip_vs_protocol 
*pp)
        return -ESRCH;
 }
 
+/*
+ *     unregister an ipvs protocols netns data
+ */
+static int
+unregister_ip_vs_proto_netns(struct net *net, struct ip_vs_proto_data *pd)
+{
+       struct netns_ipvs *ipvs = net_ipvs(net);
+       struct ip_vs_proto_data **pd_p;
+       unsigned hash = IP_VS_PROTO_HASH(pd->pp->protocol);
+
+       pd_p = &ipvs->proto_data_table[hash];
+       for (; *pd_p; pd_p = &(*pd_p)->next) {
+               if (*pd_p == pd) {
+                       *pd_p = pd->next;
+                       if (pd->pp->exit_netns != NULL)
+                               pd->pp->exit_netns(net, pd);
+                       kfree(pd);
+                       return 0;
+               }
+       }
+
+       return -ESRCH;
+}
 
 /*
  *     get ip_vs_protocol object by its proto.
@@ -100,6 +148,24 @@ struct ip_vs_protocol * ip_vs_proto_get(unsigned short 
proto)
 }
 EXPORT_SYMBOL(ip_vs_proto_get);
 
+/*
+ *     get ip_vs_protocol object data by netns and proto
+ */
+struct ip_vs_proto_data *
+ip_vs_proto_data_get(struct net *net, unsigned short proto)
+{
+       struct netns_ipvs *ipvs = net_ipvs(net);
+       struct ip_vs_proto_data *pd;
+       unsigned hash = IP_VS_PROTO_HASH(proto);
+
+       for (pd = ipvs->proto_data_table[hash]; pd; pd = pd->next) {
+               if (pd->pp->protocol == proto)
+                       return pd;
+       }
+
+       return NULL;
+}
+EXPORT_SYMBOL(ip_vs_proto_data_get);
 
 /*
  *     Propagate event for state change to all protocols
-- 
1.7.2.3

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