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authorEli Cohen <eli@dev.mellanox.co.il>2013-10-31 15:26:32 +0200
committerRoland Dreier <roland@purestorage.com>2013-11-15 10:25:32 -0800
commit1c636f801615bdfc9b1d46904e8258c7a025670b (patch)
tree600ff4b245e9287489c6c4b8a3a132f5adae5eb9 /include/rdma
parent180771a3707a4c0577cbf4f830c754dbabfdfccb (diff)
downloadlinux-linaro-stable-1c636f801615bdfc9b1d46904e8258c7a025670b.tar.gz
IB/core: Encorce MR access rights rules on kernel consumers
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 <hagaya@mellanox.com> Signed-off-by: Eli Cohen <eli@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'include/rdma')
-rw-r--r--include/rdma/ib_verbs.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 60354d53948e..68c053d0d629 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -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 */