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xprtrdma: Fix handling of RDMA_ERROR replies 

The RPC client currently doesn't handle ERR_CHUNK replies correctly.
rpcrdma_complete_rqst() incorrectly passes a negative number to
xprt_complete_rqst() as the number of bytes copied. Instead, set
task->tk_status to the error value, and return zero bytes copied.

In these cases, return -EIO rather than -EREMOTEIO. The RPC client's
finite state machine doesn't know what to do with -EREMOTEIO.

Additional clean ups:
- Don't double-count RDMA_ERROR replies
- Remove a stale comment

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: <stable@kernel.vger.org>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever 2020-06-15 09:21:13 -04:00 committed by Anna Schumaker
parent c487eb7d8e
commit 7b2182ec38
1 changed files with 3 additions and 6 deletions
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9
net/sunrpc/xprtrdma/rpc_rdma.c
View File

@ -1349,8 +1349,7 @@ rpcrdma_decode_error(struct rpcrdma_xprt *r_xprt, struct rpcrdma_rep *rep,
be32_to_cpup(p), be32_to_cpu(rep->rr_xid));
}
r_xprt->rx_stats.bad_reply_count++;
return -EREMOTEIO;
return -EIO;
}
/* Perform XID lookup, reconstruction of the RPC reply, and
@ -1387,13 +1386,11 @@ out:
spin_unlock(&xprt->queue_lock);
return;
/* If the incoming reply terminated a pending RPC, the next
* RPC call will post a replacement receive buffer as it is
* being marshaled.
*/
out_badheader:
trace_xprtrdma_reply_hdr(rep);
r_xprt->rx_stats.bad_reply_count++;
rqst->rq_task->tk_status = status;
status = 0;
goto out;
}