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xprtrdma: Recognize XDRBUF_SPARSE_PAGES 

Commit 431f6eb357 ("SUNRPC: Add a label for RPC calls that require
allocation on receive") didn't update similar logic in rpc_rdma.c.
I don't think this is a bug, per-se; the commit just adds more
careful checking for broken upper layer behavior.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever 2018-12-19 10:59:17 -05:00 committed by Anna Schumaker
parent 0dfbb5f05e
commit 15303d9ecd
1 changed files with 6 additions and 5 deletions
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11
net/sunrpc/xprtrdma/rpc_rdma.c
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@ -218,11 +218,12 @@ rpcrdma_convert_iovs(struct rpcrdma_xprt *r_xprt, struct xdr_buf *xdrbuf,
ppages = xdrbuf->pages + (xdrbuf->page_base >> PAGE_SHIFT);
page_base = offset_in_page(xdrbuf->page_base);
while (len) {
if (unlikely(!*ppages)) {
/* XXX: Certain upper layer operations do
* not provide receive buffer pages.
*/
*ppages = alloc_page(GFP_ATOMIC);
/* ACL likes to be lazy in allocating pages - ACLs
* are small by default but can get huge.
*/
if (unlikely(xdrbuf->flags & XDRBUF_SPARSE_PAGES)) {
if (!*ppages)
*ppages = alloc_page(GFP_ATOMIC);
if (!*ppages)
return -ENOBUFS;
}