From: Andreas Gruenbacher <agruenba@xxxxxxxxxx>
When encoding large, variable-length objects such as acls into xdr_bufs, it is
easier to allocate buffer pages on demand rather than precomputing the required
buffer size.
Signed-off-by: Andreas Gruenbacher <agruenba@xxxxxxxxxx>
---
net/sunrpc/xdr.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c
index 4439ac4..e6a1744 100644
--- a/net/sunrpc/xdr.c
+++ b/net/sunrpc/xdr.c
@@ -537,6 +537,14 @@ static __be32 *xdr_get_next_encode_buffer(struct xdr_stream *xdr,
*/
xdr->scratch.iov_base = xdr->p;
xdr->scratch.iov_len = frag1bytes;
+
+ if (!*xdr->page_ptr) {
+ struct page *page = alloc_page(GFP_NOFS);
+ if (!page)
+ return NULL;
+ *xdr->page_ptr = page;
+ }
+
p = page_address(*xdr->page_ptr);
/*
* Note this is where the next encode will start after we've
--
2.4.3
--
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