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xprtrdma: Remap Receive buffers after a reconnect

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[ Upstream commit 895cedc179 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Chuck Lever 2023-07-03 14:18:29 -04:00 • committed by Justin Hammond
parent 3d3d1ecdd7
commit b5257c1ec7
1 changed files with 4 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

9
net/sunrpc/xprtrdma/verbs.c
View file

@ -962,9 +962,6 @@ struct rpcrdma_rep *rpcrdma_rep_create(struct rpcrdma_xprt *r_xprt,
if (!rep->rr_rdmabuf) if (!rep->rr_rdmabuf)
goto out_free; goto out_free;
if (!rpcrdma_regbuf_dma_map(r_xprt, rep->rr_rdmabuf))
goto out_free_regbuf;
rep->rr_cid.ci_completion_id = rep->rr_cid.ci_completion_id =
atomic_inc_return(&r_xprt->rx_ep->re_completion_ids); atomic_inc_return(&r_xprt->rx_ep->re_completion_ids);
@ -983,8 +980,6 @@ struct rpcrdma_rep *rpcrdma_rep_create(struct rpcrdma_xprt *r_xprt,
spin_unlock(&buf->rb_lock); spin_unlock(&buf->rb_lock);
return rep; return rep;
out_free_regbuf:
rpcrdma_regbuf_free(rep->rr_rdmabuf);
out_free: out_free:
kfree(rep); kfree(rep);
out: out:
@ -1391,6 +1386,10 @@ void rpcrdma_post_recvs(struct rpcrdma_xprt *r_xprt, int needed, bool temp)
rep = rpcrdma_rep_create(r_xprt, temp); rep = rpcrdma_rep_create(r_xprt, temp);
if (!rep) if (!rep)
break; 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; rep->rr_cid.ci_queue_id = ep->re_attr.recv_cq->res.id;
trace_xprtrdma_post_recv(rep); trace_xprtrdma_post_recv(rep);