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| author | Jason Gunthorpe <jgg@mellanox.com> | 2018-03-20 23:19:47 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2018-03-27 23:25:08 +0300 |
| commit | 611cb92b082ad16b2fe1258e51d5aca7de540dfb (patch) | |
| tree | 641fe2e35df9c9441bcf8b324bc179f1b219e86c /include/uapi/rdma/rdma_user_cm.h | |
| parent | 38b48808b9af55f02cb226a1f09b7a5e67104569 (diff) | |
| download | linux-611cb92b082ad16b2fe1258e51d5aca7de540dfb.tar.xz | |
RDMA/ucma: Fix uABI structure layouts for 32/64 compat
The rdma_ucm_event_resp is a different length on 32 and 64 bit compiles.
The kernel requires it to be the expected length or longer so 32 bit
builds running on a 64 bit kernel will not work.
Retain full compat by having all kernels accept a struct with or without
the trailing reserved field.
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'include/uapi/rdma/rdma_user_cm.h')
| -rw-r--r-- | include/uapi/rdma/rdma_user_cm.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/uapi/rdma/rdma_user_cm.h b/include/uapi/rdma/rdma_user_cm.h index c83ef0026079..65399c837762 100644 --- a/include/uapi/rdma/rdma_user_cm.h +++ b/include/uapi/rdma/rdma_user_cm.h @@ -270,10 +270,15 @@ struct rdma_ucm_event_resp { __u32 id; __u32 event; __u32 status; + /* + * NOTE: This union is not aligned to 8 bytes so none of the union + * members may contain a u64 or anything with higher alignment than 4. + */ union { struct rdma_ucm_conn_param conn; struct rdma_ucm_ud_param ud; } param; + __u32 reserved; }; /* Option levels */ |