Commit c327a310 authored Oct 02, 2020 by Dan Aloni Committed by J. Bruce Fields Oct 16, 2020

svcrdma: fix bounce buffers for unaligned offsets and multiple pages



This was discovered using O_DIRECT at the client side, with small
unaligned file offsets or IOs that span multiple file pages.

Fixes: e248aa7b ("svcrdma: Remove max_sge check at connect time")
Signed-off-by: Dan Aloni <dan@kernelim.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

parent c1488428

net/sunrpc/xprtrdma/svc_rdma_sendto.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -638,10 +638,11 @@ static int svc_rdma_pull_up_reply_msg(struct svcxprt_rdma *rdma,
		while (remaining) {
		len = min_t(u32, PAGE_SIZE - pageoff, remaining);

		memcpy(dst, page_address(*ppages), len);
		memcpy(dst, page_address(*ppages) + pageoff, len);
		remaining -= len;
		dst += len;
		pageoff = 0;
		ppages++;
		}
		}

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