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IPVS: netns to services part 1

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Services hash tables got netns ptr a hash arg,
While Real Servers (rs) has been moved to ipvs struct.
Two new inline functions added to get net ptr from skb.

Since ip_vs is called from different contexts there is two
places to dig for the net ptr skb->dev or skb->sk
this is handled in skb_net() and skb_sknet()

Global functions, ip_vs_service_get() ip_vs_lookup_real_service()
etc have got  struct net *net as first param.
If possible get net ptr skb etc,
 - if not &init_net is used at this early stage of patching.

ip_vs_ctl.c  procfs not ready for netns yet.

*v3
 Comments by Julian
- __ip_vs_service_find and __ip_vs_svc_fwm_find are fast path,
  net_eq(svc->net, net) so the check is at the end now.
- net = skb_net(skb) in ip_vs_out moved after check for skb_dst.

Signed-off-by: Hans Schillstrom <hans.schillstrom@ericsson.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
This commit is contained in:
Hans Schillstrom
2011-01-03 14:44:43 +01:00
committed by Simon Horman
parent 61b1ab4583
commit fc723250c9
9 changed files with 214 additions and 115 deletions
Download Patch File Download Diff File Expand all files Collapse all files

64
include/net/ip_vs.h
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@@ -37,6 +37,59 @@ static inline struct netns_ipvs *net_ipvs(struct net* net)
{
return net->ipvs;
}
/*
* Get net ptr from skb in traffic cases
* use skb_sknet when call is from userland (ioctl or netlink)
*/
static inline struct net *skb_net(struct sk_buff *skb)
{
#ifdef CONFIG_NET_NS
#ifdef CONFIG_IP_VS_DEBUG
/*
* This is used for debug only.
* Start with the most likely hit
* End with BUG
*/
if (likely(skb->dev && skb->dev->nd_net))
return dev_net(skb->dev);
if (skb_dst(skb)->dev)
return dev_net(skb_dst(skb)->dev);
WARN(skb->sk, "Maybe skb_sknet should be used in %s() at line:%d\n",
__func__, __LINE__);
if (likely(skb->sk && skb->sk->sk_net))
return sock_net(skb->sk);
pr_err("There is no net ptr to find in the skb in %s() line:%d\n",
__func__, __LINE__);
BUG();
#else
return dev_net(skb->dev ? : skb_dst(skb)->dev);
#endif
#else
return &init_net;
#endif
}
static inline struct net *skb_sknet(struct sk_buff *skb)
{
#ifdef CONFIG_NET_NS
#ifdef CONFIG_IP_VS_DEBUG
/* Start with the most likely hit */
if (likely(skb->sk && skb->sk->sk_net))
return sock_net(skb->sk);
WARN(skb->dev, "Maybe skb_net should be used instead in %s() line:%d\n",
__func__, __LINE__);
if (likely(skb->dev && skb->dev->nd_net))
return dev_net(skb->dev);
pr_err("There is no net ptr to find in the skb in %s() line:%d\n",
__func__, __LINE__);
BUG();
#else
return sock_net(skb->sk);
#endif
#else
return &init_net;
#endif
}
/* Connections' size value needed by ip_vs_ctl.c */
extern int ip_vs_conn_tab_size;
@@ -496,6 +549,7 @@ struct ip_vs_service {
unsigned flags; /* service status flags */
unsigned timeout; /* persistent timeout in ticks */
__be32 netmask; /* grouping granularity */
struct net *net;
struct list_head destinations; /* real server d-linked list */
__u32 num_dests; /* number of servers */
@@ -896,7 +950,7 @@ extern int sysctl_ip_vs_sync_ver;
extern void ip_vs_sync_switch_mode(int mode);
extern struct ip_vs_service *
ip_vs_service_get(int af, __u32 fwmark, __u16 protocol,
ip_vs_service_get(struct net *net, int af, __u32 fwmark, __u16 protocol,
const union nf_inet_addr *vaddr, __be16 vport);
static inline void ip_vs_service_put(struct ip_vs_service *svc)
@@ -905,7 +959,7 @@ static inline void ip_vs_service_put(struct ip_vs_service *svc)
}
extern struct ip_vs_dest *
ip_vs_lookup_real_service(int af, __u16 protocol,
ip_vs_lookup_real_service(struct net *net, int af, __u16 protocol,
const union nf_inet_addr *daddr, __be16 dport);
extern int ip_vs_use_count_inc(void);
@@ -913,9 +967,9 @@ extern void ip_vs_use_count_dec(void);
extern int ip_vs_control_init(void);
extern void ip_vs_control_cleanup(void);
extern 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,
__u32 fwmark);
ip_vs_find_dest(struct net *net, int af, const union nf_inet_addr *daddr,
__be16 dport, const union nf_inet_addr *vaddr, __be16 vport,
__u16 protocol, __u32 fwmark);
extern struct ip_vs_dest *ip_vs_try_bind_dest(struct ip_vs_conn *cp);