xprtrdma: Chain together all MWs in same buffer pool
During connection loss recovery, need to visit every MW in a buffer pool. Any MW that is in use by an RPC will not be on the rb_mws list. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: Steve Wise <swise@opengridcomputing.com> Tested-by: Shirley Ma <shirley.ma@oracle.com> Tested-by: Devesh Sharma <devesh.sharma@emulex.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
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@ -1074,6 +1074,7 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep,
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p += cdata->padding;
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INIT_LIST_HEAD(&buf->rb_mws);
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INIT_LIST_HEAD(&buf->rb_all);
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r = (struct rpcrdma_mw *)p;
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switch (ia->ri_memreg_strategy) {
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case RPCRDMA_FRMR:
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@ -1098,6 +1099,7 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep,
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ib_dereg_mr(r->r.frmr.fr_mr);
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goto out;
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}
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list_add(&r->mw_all, &buf->rb_all);
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list_add(&r->mw_list, &buf->rb_mws);
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++r;
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}
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@ -1116,6 +1118,7 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep,
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" failed %i\n", __func__, rc);
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goto out;
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}
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list_add(&r->mw_all, &buf->rb_all);
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list_add(&r->mw_list, &buf->rb_mws);
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++r;
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}
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@ -1225,6 +1228,7 @@ rpcrdma_buffer_destroy(struct rpcrdma_buffer *buf)
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while (!list_empty(&buf->rb_mws)) {
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r = list_entry(buf->rb_mws.next,
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struct rpcrdma_mw, mw_list);
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list_del(&r->mw_all);
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list_del(&r->mw_list);
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switch (ia->ri_memreg_strategy) {
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case RPCRDMA_FRMR:
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@ -151,7 +151,7 @@ struct rpcrdma_rep {
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* An external memory region is any buffer or page that is registered
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* on the fly (ie, not pre-registered).
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*
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* Each rpcrdma_buffer has a list of these anchored in rb_mws. During
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* Each rpcrdma_buffer has a list of free MWs anchored in rb_mws. During
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* call_allocate, rpcrdma_buffer_get() assigns one to each segment in
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* an rpcrdma_req. Then rpcrdma_register_external() grabs these to keep
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* track of registration metadata while each RPC is pending.
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@ -175,6 +175,7 @@ struct rpcrdma_mw {
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struct rpcrdma_frmr frmr;
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} r;
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struct list_head mw_list;
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struct list_head mw_all;
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};
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/*
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@ -246,6 +247,7 @@ struct rpcrdma_buffer {
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atomic_t rb_credits; /* most recent server credits */
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int rb_max_requests;/* client max requests */
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struct list_head rb_mws; /* optional memory windows/fmrs/frmrs */
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struct list_head rb_all;
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int rb_send_index;
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struct rpcrdma_req **rb_send_bufs;
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int rb_recv_index;
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