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RDMA/ucma: Fix rdma_ucm_query_ib_service_resp struct padding

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On a few 32-bit architectures, the newly added ib_user_service_rec
structure is not 64-bit aligned the way it is on most regular ones.

Add explicit padding into the rdma_ucm_query_ib_service_resp and
rdma_ucm_resolve_ib_service structures that embed it, so that the layout
is compatible across all of them.

This is an ABI change on i386, aligning it with x86_64 and the other
64-bit architectures to avoid having to use a compat ioctl handler.

Fixes: 810f874eda ("RDMA/ucma: Support query resolved service records")
Link: https://patch.msgid.link/r/20251208133311.313977-1-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Arnd Bergmann
2025-12-08 14:33:05 +01:00
committed by Jason Gunthorpe
parent 57f3cb6c84
commit 2dc675f614
1 changed files with 3 additions and 1 deletions
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4
include/uapi/rdma/rdma_user_cm.h
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@@ -192,6 +192,7 @@ struct rdma_ucm_query_path_resp {
struct rdma_ucm_query_ib_service_resp {
__u32 num_service_recs;
__u32 reserved;
struct ib_user_service_rec recs[];
};
@@ -354,7 +355,7 @@ enum {
#define RDMA_USER_CM_IB_SERVICE_NAME_SIZE 64
struct rdma_ucm_ib_service {
__u64 service_id;
__aligned_u64 service_id;
__u8 service_name[RDMA_USER_CM_IB_SERVICE_NAME_SIZE];
__u32 flags;
__u32 reserved;
@@ -362,6 +363,7 @@ struct rdma_ucm_ib_service {
struct rdma_ucm_resolve_ib_service {
__u32 id;
__u32 reserved;
struct rdma_ucm_ib_service ibs;
};