github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-28 17:13:52 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

RDMA/core: Resolve MAC of next-hop device without ARP support

Browse Source 
Currently, if the next-hop netdevice does not support ARP resolution,
the destination MAC address is silently set to zero without reporting
an error. This leads to incorrect behavior and may result in packet
transmission failures.

Fix this by deferring MAC resolution to the IP stack via neighbour
lookup, allowing proper resolution or error reporting as appropriate.

Fixes: 7025fcd36b ("IB: address translation to map IP toIB addresses (GIDs)")
Signed-off-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Vlad Dumitrescu <vdumitrescu@nvidia.com>
Signed-off-by: Edward Srouji <edwards@nvidia.com>
Link: https://patch.msgid.link/20250916111103.84069-3-edwards@nvidia.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Parav Pandit 2025-09-16 14:11:01 +03:00 committed by Leon Romanovsky
parent fa29d1e887
commit 200651b9b8
1 changed files with 3 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/infiniband/core/addr.c
View File

@ -454,14 +454,10 @@ static int addr_resolve_neigh(const struct dst_entry *dst,
{
int ret = 0;
if (ndev_flags & IFF_LOOPBACK) {
if (ndev_flags & IFF_LOOPBACK)
memcpy(addr->dst_dev_addr, addr->src_dev_addr, MAX_ADDR_LEN);
} else {
if (!(ndev_flags & IFF_NOARP)) {
/* If the device doesn't do ARP internally */
ret = fetch_ha(dst, addr, dst_in, seq);
}
}
else
ret = fetch_ha(dst, addr, dst_in, seq);
return ret;
}