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neighbour: send netlink notification if NTF_ROUTER changes 

send netlink notification if neigh_update results in NTF_ROUTER
change and if NEIGH_UPDATE_F_ISROUTER is on. Also move the
NTF_ROUTER change function into a helper.

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Roopa Prabhu 2018-09-22 21:26:20 -07:00 committed by David S. Miller
parent f7aa74e483
commit fc6e8073f3
2 changed files with 17 additions and 5 deletions
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15
include/net/neighbour.h
View File

@ -544,4 +544,19 @@ static inline void neigh_update_ext_learned(struct neighbour *neigh, u32 flags,
*notify = 1;
}
}
static inline void neigh_update_is_router(struct neighbour *neigh, u32 flags,
int *notify)
{
u8 ndm_flags = 0;
ndm_flags |= (flags & NEIGH_UPDATE_F_ISROUTER) ? NTF_ROUTER : 0;
if ((neigh->flags ^ ndm_flags) & NTF_ROUTER) {
if (ndm_flags & NTF_ROUTER)
neigh->flags |= NTF_ROUTER;
else
neigh->flags &= ~NTF_ROUTER;
*notify = 1;
}
}
#endif

7
net/core/neighbour.c
View File

@ -1280,11 +1280,8 @@ int neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new,
neigh->arp_queue_len_bytes = 0;
}
out:
if (update_isrouter) {
neigh->flags = (flags & NEIGH_UPDATE_F_ISROUTER) ?
(neigh->flags | NTF_ROUTER) :
(neigh->flags & ~NTF_ROUTER);
}
if (update_isrouter)
neigh_update_is_router(neigh, flags, &notify);
write_unlock_bh(&neigh->lock);
if (notify)