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datapath: Add support for kernels 3.13

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Add support for building the in-tree kernel datapath for
Linux kernels up to 3.13. There were some changes in the
netlink area which required adding new compatibility code
for this layer. Also, some new per-cpu stats initialization
code was added.

Based on patch from Kyle Mestery.

Signed-off-by: Kyle Mestery <mestery@noironetworks.com>
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Kyle Mestery <mestery@noironetworks.com>
This commit is contained in:
Pravin Shelar
2014-04-01 20:55:21 -07:00
committed by Pravin B Shelar
parent 1839c35676
commit cb25142c50
15 changed files with 284 additions and 138 deletions
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48
datapath/linux/compat/genetlink-openvswitch.c
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@@ -1,12 +1,15 @@
#include <net/genetlink.h>
#include <linux/version.h>
/* This is analogous to rtnl_notify() but uses genl_sock instead of rtnl.
*
* This is not (yet) in any upstream kernel. */
void genl_notify(struct sk_buff *skb, struct net *net, u32 portid, u32 group,
struct nlmsghdr *nlh, gfp_t flags)
#if LINUX_VERSION_CODE < KERNEL_VERSION(3,13,0)
#undef genl_notify
void rpl_genl_notify(struct rpl_genl_family *family, struct sk_buff *skb,
struct net *net, u32 portid, u32 group,
struct nlmsghdr *nlh, gfp_t flags)
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(3,3,0)
struct sock *sk = net->genl_sock;
int report = 0;
@@ -14,4 +17,39 @@ void genl_notify(struct sk_buff *skb, struct net *net, u32 portid, u32 group,
report = nlmsg_report(nlh);
nlmsg_notify(sk, skb, portid, group, report, flags);
#else
genl_notify(skb, net, portid, group, nlh, flags);
#endif
}
int rpl___genl_register_family(struct rpl_genl_family *f)
{
int err;
f->compat_family.id = f->id;
f->compat_family.hdrsize = f->hdrsize;
strncpy(f->compat_family.name, f->name, GENL_NAMSIZ);
f->compat_family.version = f->version;
f->compat_family.maxattr = f->maxattr;
f->compat_family.netnsok = f->netnsok;
#ifdef HAVE_PARALLEL_OPS
f->compat_family.parallel_ops = f->parallel_ops;
#endif
err = genl_register_family_with_ops(&f->compat_family,
(struct genl_ops *) f->ops, f->n_ops);
if (err)
goto error;
if (f->mcgrps) {
/* Need to Fix GROUP_ID() for more than one group. */
BUG_ON(f->n_mcgrps > 1);
err = genl_register_mc_group(&f->compat_family,
(struct genl_multicast_group *) f->mcgrps);
if (err)
goto error;
}
error:
return err;
}
#endif /* kernel version < 3.13.0 */