SUNRPC: Refactor logic to NUL-terminate strings in pages
Clean up: Introduce a helper to '\0'-terminate XDR strings
that are placed in a page in the page cache.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c
index 3bbef7f..e0725d9 100644
--- a/net/sunrpc/xdr.c
+++ b/net/sunrpc/xdr.c
@@ -111,6 +111,23 @@
}
EXPORT_SYMBOL_GPL(xdr_decode_string_inplace);
+/**
+ * xdr_terminate_string - '\0'-terminate a string residing in an xdr_buf
+ * @buf: XDR buffer where string resides
+ * @len: length of string, in bytes
+ *
+ */
+void
+xdr_terminate_string(struct xdr_buf *buf, const u32 len)
+{
+ char *kaddr;
+
+ kaddr = kmap_atomic(buf->pages[0], KM_USER0);
+ kaddr[buf->page_base + len] = '\0';
+ kunmap_atomic(kaddr, KM_USER0);
+}
+EXPORT_SYMBOL(xdr_terminate_string);
+
void
xdr_encode_pages(struct xdr_buf *xdr, struct page **pages, unsigned int base,
unsigned int len)
