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xprtrdma: Add a "deregister_external" op for each memreg mode

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There is very little common processing among the different external
memory deregistration functions.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-by: Devesh Sharma <Devesh.Sharma@Emulex.Com>
Tested-by: Meghana Cheripady <Meghana.Cheripady@Emulex.Com>
Tested-by: Veeresh U. Kokatnur <veereshuk@chelsio.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever
2015-03-30 14:34:48 -04:00
committed by Anna Schumaker
parent 9c1b4d775f
commit 6814baead8
7 changed files with 84 additions and 90 deletions
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27
net/sunrpc/xprtrdma/fmr_ops.c
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@@ -79,8 +79,35 @@ out_maperr:
return rc;
}
/* Use the ib_unmap_fmr() verb to prevent further remote
* access via RDMA READ or RDMA WRITE.
*/
static int
fmr_op_unmap(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg)
{
struct rpcrdma_ia *ia = &r_xprt->rx_ia;
struct rpcrdma_mr_seg *seg1 = seg;
int rc, nsegs = seg->mr_nsegs;
LIST_HEAD(l);
list_add(&seg1->rl_mw->r.fmr->list, &l);
rc = ib_unmap_fmr(&l);
read_lock(&ia->ri_qplock);
while (seg1->mr_nsegs--)
rpcrdma_unmap_one(ia, seg++);
read_unlock(&ia->ri_qplock);
if (rc)
goto out_err;
return nsegs;
out_err:
dprintk("RPC: %s: ib_unmap_fmr status %i\n", __func__, rc);
return nsegs;
}
const struct rpcrdma_memreg_ops rpcrdma_fmr_memreg_ops = {
.ro_map = fmr_op_map,
.ro_unmap = fmr_op_unmap,
.ro_maxpages = fmr_op_maxpages,
.ro_displayname = "fmr",
};