diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/neighbour.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/net/core/neighbour.c b/net/core/neighbour.c index 58b0bcc125b5..d274f81fcc2c 100644 --- a/net/core/neighbour.c +++ b/net/core/neighbour.c @@ -1132,10 +1132,6 @@ int neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new, lladdr = neigh->ha; } - if (new & NUD_CONNECTED) - neigh->confirmed = jiffies; - neigh->updated = jiffies; - /* If entry was valid and address is not changed, do not change entry state, if new one is STALE. */ @@ -1157,6 +1153,16 @@ int neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new, } } + /* Update timestamps only once we know we will make a change to the + * neighbour entry. Otherwise we risk to move the locktime window with + * noop updates and ignore relevant ARP updates. + */ + if (new != old || lladdr != neigh->ha) { + if (new & NUD_CONNECTED) + neigh->confirmed = jiffies; + neigh->updated = jiffies; + } + if (new != old) { neigh_del_timer(neigh); if (new & NUD_PROBE) |