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svcrdma: De-duplicate code that locates Write and Reply chunks

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Cache the locations of the Requester-provided Write list and Reply
chunk so that the Send path doesn't need to parse the Call header
again.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever
2020-03-02 15:01:08 -05:00
parent e604aad2ca
commit 2fe8c44633
3 changed files with 14 additions and 35 deletions
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9
net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
View File

@@ -479,6 +479,7 @@ static bool xdr_check_write_list(struct svc_rdma_recv_ctxt *rctxt)
p = xdr_inline_decode(&rctxt->rc_stream, sizeof(*p));
if (!p)
return false;
rctxt->rc_write_list = p;
while (*p != xdr_zero) {
if (!xdr_check_write_chunk(rctxt, MAX_BYTES_WRITE_CHUNK))
return false;
@@ -487,6 +488,8 @@ static bool xdr_check_write_list(struct svc_rdma_recv_ctxt *rctxt)
if (!p)
return false;
}
if (!chcount)
rctxt->rc_write_list = NULL;
return chcount < 2;
}
@@ -509,9 +512,13 @@ static bool xdr_check_reply_chunk(struct svc_rdma_recv_ctxt *rctxt)
p = xdr_inline_decode(&rctxt->rc_stream, sizeof(*p));
if (!p)
return false;
if (*p != xdr_zero)
rctxt->rc_reply_chunk = p;
if (*p != xdr_zero) {
if (!xdr_check_write_chunk(rctxt, MAX_BYTES_SPECIAL_CHUNK))
return false;
} else {
rctxt->rc_reply_chunk = NULL;
}
return true;
}