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| author | Chuck Lever | 2015-08-03 19:03:09 +0200 |
|---|---|---|
| committer | Anna Schumaker | 2015-08-05 22:21:26 +0200 |
| commit | d23109302390d61d83675a86453674446eccb776 (patch) | |
| tree | e27c5f78ba4dc4bb80e5486773605047720ea8e9 /net | |
| parent | xprtrdma: Increase default credit limit (diff) | |
| download | kernel-qcow2-linux-d23109302390d61d83675a86453674446eccb776.tar.gz kernel-qcow2-linux-d23109302390d61d83675a86453674446eccb776.tar.xz kernel-qcow2-linux-d23109302390d61d83675a86453674446eccb776.zip | |
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: Chuck Lever <chuck.lever@oracle.com>
Tested-by: Devesh Sharma <devesh.sharma@avagotech.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sunrpc/xprtrdma/verbs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c index 891c4ede2c20..1065808d25b4 100644 --- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -539,7 +539,7 @@ rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr, int memreg) if (!ia->ri_device->alloc_fmr) { dprintk("RPC: %s: MTHCAFMR registration " "not supported by HCA\n", __func__); - memreg = RPCRDMA_ALLPHYSICAL; + goto out3; } } |