Commit d2310930 authored by Chuck Lever's avatar Chuck Lever Committed by Anna Schumaker

xprtrdma: Don't fall back to PHYSICAL memory registration

PHYSICAL memory registration uses a single rkey for all of the
client's memory, thus is insecure. It is still useful in some cases
for testing.

Retain the ability to select PHYSICAL memory registration capability
via /proc/sys/sunrpc/rdma_memreg_strategy, but don't fall back to it
if the HCA does not support FRWR or FMR.

This means amso1100 no longer works out of the box with NFS/RDMA.
When using amso1100 HCAs, set the memreg_strategy sysctl to 6 before
performing NFS/RDMA mounts.
Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
Tested-by: default avatarDevesh Sharma <devesh.sharma@avagotech.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarAnna Schumaker <Anna.Schumaker@Netapp.com>
parent 061dff29
...@@ -539,7 +539,7 @@ rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr, int memreg) ...@@ -539,7 +539,7 @@ rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr, int memreg)
if (!ia->ri_device->alloc_fmr) { if (!ia->ri_device->alloc_fmr) {
dprintk("RPC: %s: MTHCAFMR registration " dprintk("RPC: %s: MTHCAFMR registration "
"not supported by HCA\n", __func__); "not supported by HCA\n", __func__);
memreg = RPCRDMA_ALLPHYSICAL; goto out3;
} }
} }
......
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