svcrdma: fix bounce buffers for unaligned offsets and multiple pages
[ Upstream commit c327a310ec4d6ecbea13185ed56c11def441d9ab ]
This was discovered using O_DIRECT at the client side, with small
unaligned file offsets or IOs that span multiple file pages.
Fixes: e248aa7be8
("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -609,10 +609,11 @@ static int svc_rdma_pull_up_reply_msg(struct svcxprt_rdma *rdma,
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while (remaining) {
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len = min_t(u32, PAGE_SIZE - pageoff, remaining);
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memcpy(dst, page_address(*ppages), len);
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memcpy(dst, page_address(*ppages) + pageoff, len);
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remaining -= len;
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dst += len;
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pageoff = 0;
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ppages++;
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}
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}
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