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xprtrdma: Remap Receive buffers after a reconnect 

On server-initiated disconnect, rpcrdma_xprt_disconnect() was DMA-
unmapping the Receive buffers, but rpcrdma_post_recvs() neglected
to remap them after a new connection had been established. The
result was immediate failure of the new connection with the Receives
flushing with LOCAL_PROT_ERR.

Fixes: 671c450b6f ("xprtrdma: Fix oops in Receive handler after device removal")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Chuck Lever 2023-07-03 14:18:29 -04:00 committed by Trond Myklebust
parent f4e89f1a6d
commit 895cedc179
1 changed files with 4 additions and 5 deletions
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9
net/sunrpc/xprtrdma/verbs.c
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@ -935,9 +935,6 @@ struct rpcrdma_rep *rpcrdma_rep_create(struct rpcrdma_xprt *r_xprt,
if (!rep->rr_rdmabuf)
goto out_free;
if (!rpcrdma_regbuf_dma_map(r_xprt, rep->rr_rdmabuf))
goto out_free_regbuf;
rep->rr_cid.ci_completion_id =
atomic_inc_return(&r_xprt->rx_ep->re_completion_ids);
@ -956,8 +953,6 @@ struct rpcrdma_rep *rpcrdma_rep_create(struct rpcrdma_xprt *r_xprt,
spin_unlock(&buf->rb_lock);
return rep;
out_free_regbuf:
rpcrdma_regbuf_free(rep->rr_rdmabuf);
out_free:
kfree(rep);
out:
@ -1363,6 +1358,10 @@ void rpcrdma_post_recvs(struct rpcrdma_xprt *r_xprt, int needed, bool temp)
rep = rpcrdma_rep_create(r_xprt, temp);
if (!rep)
break;
if (!rpcrdma_regbuf_dma_map(r_xprt, rep->rr_rdmabuf)) {
rpcrdma_rep_put(buf, rep);
break;
}
rep->rr_cid.ci_queue_id = ep->re_attr.recv_cq->res.id;
trace_xprtrdma_post_recv(rep);