This is a note to let you know that I've just added the patch titled
NFSD: Refactor common code out of dirlist helpers
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
nfsd-refactor-common-code-out-of-dirlist-helpers.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit cc86c4bbaa4816aaa9a6f055c3e468194b8cc7d2
Author: Chuck Lever <chuck.lever@xxxxxxxxxx>
Date: Mon Sep 12 17:22:56 2022 -0400
NFSD: Refactor common code out of dirlist helpers
[ Upstream commit 98124f5bd6c76699d514fbe491dd95265369cc99 ]
The dust has settled a bit and it's become obvious what code is
totally common between nfsd_init_dirlist_pages() and
nfsd3_init_dirlist_pages(). Move that common code to SUNRPC.
The new helper brackets the existing xdr_init_decode_pages() API.
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c
index 58695e4e18b46..923d9a80df92c 100644
--- a/fs/nfsd/nfs3proc.c
+++ b/fs/nfsd/nfs3proc.c
@@ -574,15 +574,7 @@ static void nfsd3_init_dirlist_pages(struct svc_rqst *rqstp,
buf->pages = rqstp->rq_next_page;
rqstp->rq_next_page += (buf->buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
- /* This is xdr_init_encode(), but it assumes that
- * the head kvec has already been consumed. */
- xdr_set_scratch_buffer(xdr, NULL, 0);
- xdr->buf = buf;
- xdr->page_ptr = buf->pages;
- xdr->iov = NULL;
- xdr->p = page_address(*buf->pages);
- xdr->end = (void *)xdr->p + min_t(u32, buf->buflen, PAGE_SIZE);
- xdr->rqst = NULL;
+ xdr_init_encode_pages(xdr, buf, buf->pages, NULL);
}
/*
diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c
index 49778ff410e32..82b3ddeacc338 100644
--- a/fs/nfsd/nfsproc.c
+++ b/fs/nfsd/nfsproc.c
@@ -575,15 +575,7 @@ static void nfsd_init_dirlist_pages(struct svc_rqst *rqstp,
buf->pages = rqstp->rq_next_page;
rqstp->rq_next_page++;
- /* This is xdr_init_encode(), but it assumes that
- * the head kvec has already been consumed. */
- xdr_set_scratch_buffer(xdr, NULL, 0);
- xdr->buf = buf;
- xdr->page_ptr = buf->pages;
- xdr->iov = NULL;
- xdr->p = page_address(*buf->pages);
- xdr->end = (void *)xdr->p + min_t(u32, buf->buflen, PAGE_SIZE);
- xdr->rqst = NULL;
+ xdr_init_encode_pages(xdr, buf, buf->pages, NULL);
}
/*
diff --git a/include/linux/sunrpc/xdr.h b/include/linux/sunrpc/xdr.h
index 3a2c714d6b629..98e197376a0d9 100644
--- a/include/linux/sunrpc/xdr.h
+++ b/include/linux/sunrpc/xdr.h
@@ -240,6 +240,8 @@ typedef int (*kxdrdproc_t)(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
extern void xdr_init_encode(struct xdr_stream *xdr, struct xdr_buf *buf,
__be32 *p, struct rpc_rqst *rqst);
+extern void xdr_init_encode_pages(struct xdr_stream *xdr, struct xdr_buf *buf,
+ struct page **pages, struct rpc_rqst *rqst);
extern __be32 *xdr_reserve_space(struct xdr_stream *xdr, size_t nbytes);
extern int xdr_reserve_space_vec(struct xdr_stream *xdr, struct kvec *vec,
size_t nbytes);
diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c
index f0a0a4ad6d525..b227d0c8471ff 100644
--- a/net/sunrpc/xdr.c
+++ b/net/sunrpc/xdr.c
@@ -918,6 +918,28 @@ void xdr_init_encode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p,
}
EXPORT_SYMBOL_GPL(xdr_init_encode);
+/**
+ * xdr_init_encode_pages - Initialize an xdr_stream for encoding into pages
+ * @xdr: pointer to xdr_stream struct
+ * @buf: pointer to XDR buffer into which to encode data
+ * @pages: list of pages to decode into
+ * @rqst: pointer to controlling rpc_rqst, for debugging
+ *
+ */
+void xdr_init_encode_pages(struct xdr_stream *xdr, struct xdr_buf *buf,
+ struct page **pages, struct rpc_rqst *rqst)
+{
+ xdr_reset_scratch_buffer(xdr);
+
+ xdr->buf = buf;
+ xdr->page_ptr = pages;
+ xdr->iov = NULL;
+ xdr->p = page_address(*pages);
+ xdr->end = (void *)xdr->p + min_t(u32, buf->buflen, PAGE_SIZE);
+ xdr->rqst = rqst;
+}
+EXPORT_SYMBOL_GPL(xdr_init_encode_pages);
+
/**
* xdr_commit_encode - Ensure all data is written to buffer
* @xdr: pointer to xdr_stream
