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IB/core: Encorce MR access rights rules on kernel consumers

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Enforce the rule that when requesting remote write or atomic permissions, local
write must be indicated as well. See IB spec 11.2.8.2.

Spotted by: Hagay Abramovsky <[email protected]>
Signed-off-by: Eli Cohen <[email protected]>
Signed-off-by: Roland Dreier <[email protected]>
This commit is contained in:
Eli Cohen 2013-10-31 15:26:32 +02:00 • committed by Roland Dreier
commit 1c636f8016
3 changed files with 30 additions and 7 deletions
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13
include/rdma/ib_verbs.h
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@ -2386,4 +2386,17 @@ struct ib_flow *ib_create_flow(struct ib_qp *qp,
struct ib_flow_attr *flow_attr, int domain);
int ib_destroy_flow(struct ib_flow *flow_id);
static inline int ib_check_mr_access(int flags)
{
/*
* Local write permission is required if remote write or
* remote atomic permission is also requested.
*/
if (flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
!(flags & IB_ACCESS_LOCAL_WRITE))
return -EINVAL;
return 0;
}
#endif /* IB_VERBS_H */