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| author | Chuck Lever <[email protected]> | 2023-07-17 15:12:12 +0000 |
|---|---|---|
| committer | Jason Gunthorpe <[email protected]> | 2023-07-21 19:00:18 +0000 |
| commit | bad5b6e34ffbaacc77ad28a0f482e33b3929e635 (patch) | |
| tree | 4ca6ea33624b326dfb38d6d168f96ba13999a360 /drivers/infiniband/core/cache.c | |
| parent | RDMA/bnxt_re: use vmalloc_array and vcalloc (diff) | |
| download | kernel-bad5b6e34ffbaacc77ad28a0f482e33b3929e635.tar.gz kernel-bad5b6e34ffbaacc77ad28a0f482e33b3929e635.zip | |
RDMA/siw: Fabricate a GID on tun and loopback devices
LOOPBACK and NONE (tunnel) devices have all-zero MAC addresses.
Currently, siw_device_create() falls back to copying the IB device's
name in those cases, because an all-zero MAC address breaks the RDMA
core address resolution mechanism.
However, at the point when siw_device_create() constructs a GID, the
ib_device::name field is uninitialized, leaving the MAC address to
remain in an all-zero state.
Fabricate a random artificial GID for such devices, and ensure this
artificial GID is returned for all device query operations.
Link: https://lore.kernel.org/r/168960673260.3007.12378736853793339110.stgit@manet.1015granger.net
Reported-by: Tom Talpey <[email protected]>
Fixes: a2d36b02c15d ("RDMA/siw: Enable siw on tunnel devices")
Reviewed-by: Bernard Metzler <[email protected]>
Reviewed-by: Tom Talpey <[email protected]>
Signed-off-by: Chuck Lever <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>
Diffstat (limited to 'drivers/infiniband/core/cache.c')
0 files changed, 0 insertions, 0 deletions