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NFSD: Ensure that xdr_write_pages updates rq_next_page

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All other NFSv[23] procedures manage to keep page_ptr and
rq_next_page in lock step.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever
2023-05-18 13:45:36 -04:00
parent 66a21db7db
commit 82078b9895
3 changed files with 35 additions and 8 deletions
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21
include/linux/sunrpc/svc.h
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@@ -508,6 +508,27 @@ static inline void svcxdr_init_encode(struct svc_rqst *rqstp)
xdr->rqst = NULL;
}
/**
* svcxdr_encode_opaque_pages - Insert pages into an xdr_stream
* @xdr: xdr_stream to be updated
* @pages: array of pages to insert
* @base: starting offset of first data byte in @pages
* @len: number of data bytes in @pages to insert
*
* After the @pages are added, the tail iovec is instantiated pointing
* to end of the head buffer, and the stream is set up to encode
* subsequent items into the tail.
*/
static inline void svcxdr_encode_opaque_pages(struct svc_rqst *rqstp,
struct xdr_stream *xdr,
struct page **pages,
unsigned int base,
unsigned int len)
{
xdr_write_pages(xdr, pages, base, len);
xdr->page_ptr = rqstp->rq_next_page - 1;
}
/**
* svcxdr_set_auth_slack -
* @rqstp: RPC transaction