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xprtrdma: Allocate Protection Domain in rpcrdma_ep_create()

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Make a Protection Domain (PD) a per-connection resource rather than
a per-transport resource. In other words, when the connection
terminates, the PD is destroyed.

Thus there is one less HW resource that remains allocated to a
transport after a connection is closed.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever 2020-02-21 17:00:33 -05:00 committed by Anna Schumaker
parent 9144a803df
commit 9ba373ee24
1 changed files with 10 additions and 16 deletions
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26
net/sunrpc/xprtrdma/verbs.c
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@ -363,14 +363,6 @@ rpcrdma_ia_open(struct rpcrdma_xprt *xprt)
rc = PTR_ERR(ia->ri_id);
goto out_err;
}
ia->ri_pd = ib_alloc_pd(ia->ri_id->device, 0);
if (IS_ERR(ia->ri_pd)) {
rc = PTR_ERR(ia->ri_pd);
pr_err("rpcrdma: ib_alloc_pd() returned %d\n", rc);
goto out_err;
}
return 0;
out_err:
@ -403,9 +395,6 @@ rpcrdma_ia_remove(struct rpcrdma_ia *ia)
rpcrdma_ep_destroy(r_xprt);
ib_dealloc_pd(ia->ri_pd);
ia->ri_pd = NULL;
/* Allow waiters to continue */
complete(&ia->ri_remove_done);
@ -423,11 +412,6 @@ rpcrdma_ia_close(struct rpcrdma_ia *ia)
if (ia->ri_id && !IS_ERR(ia->ri_id))
rdma_destroy_id(ia->ri_id);
ia->ri_id = NULL;
/* If the pd is still busy, xprtrdma missed freeing a resource */
if (ia->ri_pd && !IS_ERR(ia->ri_pd))
ib_dealloc_pd(ia->ri_pd);
ia->ri_pd = NULL;
}
static int rpcrdma_ep_create(struct rpcrdma_xprt *r_xprt,
@ -514,6 +498,12 @@ static int rpcrdma_ep_create(struct rpcrdma_xprt *r_xprt,
ep->rep_remote_cma.flow_control = 0;
ep->rep_remote_cma.rnr_retry_count = 0;
ia->ri_pd = ib_alloc_pd(id->device, 0);
if (IS_ERR(ia->ri_pd)) {
rc = PTR_ERR(ia->ri_pd);
goto out_destroy;
}
rc = rdma_create_qp(id, ia->ri_pd, &ep->rep_attr);
if (rc)
goto out_destroy;
@ -540,6 +530,10 @@ static void rpcrdma_ep_destroy(struct rpcrdma_xprt *r_xprt)
if (ep->rep_attr.send_cq)
ib_free_cq(ep->rep_attr.send_cq);
ep->rep_attr.send_cq = NULL;
if (ia->ri_pd)
ib_dealloc_pd(ia->ri_pd);
ia->ri_pd = NULL;
}
/* Re-establish a connection after a device removal event.