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authorAnna Schumaker <Anna.Schumaker@Netapp.com>2020-04-17 18:00:24 +0300
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2020-10-07 21:28:39 +0300
commitcf1f08cac375630af6b6307907a3fc20fcf847c7 (patch)
tree0158e4b775cbd92951c89de52f027e1503ec742f /net/sunrpc
parentf7d61ee414cadaeb05af3bf7a64fb99760b9c6e7 (diff)
downloadlinux-cf1f08cac375630af6b6307907a3fc20fcf847c7.tar.xz
SUNRPC: Implement a xdr_page_pos() function
I'll need this for READ_PLUS to help figure out the offset where page data is stored at, but it might also be useful for other things. Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc')
-rw-r--r--net/sunrpc/xdr.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c
index fa7517c1d125..909920fab93b 100644
--- a/net/sunrpc/xdr.c
+++ b/net/sunrpc/xdr.c
@@ -506,6 +506,19 @@ unsigned int xdr_stream_pos(const struct xdr_stream *xdr)
EXPORT_SYMBOL_GPL(xdr_stream_pos);
/**
+ * xdr_page_pos - Return the current offset from the start of the xdr pages
+ * @xdr: pointer to struct xdr_stream
+ */
+unsigned int xdr_page_pos(const struct xdr_stream *xdr)
+{
+ unsigned int pos = xdr_stream_pos(xdr);
+
+ WARN_ON(pos < xdr->buf->head[0].iov_len);
+ return pos - xdr->buf->head[0].iov_len;
+}
+EXPORT_SYMBOL_GPL(xdr_page_pos);
+
+/**
* xdr_init_encode - Initialize a struct xdr_stream for sending data.
* @xdr: pointer to xdr_stream struct
* @buf: pointer to XDR buffer in which to encode data