svcrpc: track rpc data length separately from sk_tcplen
Keep a separate field, sk_datalen, that tracks only the data contained
in a fragment, not including the fragment header.
For now, this is always just max(0, sk_tcplen - 4), but after we allow
multiple fragments sk_datalen will accumulate the total rpc data size
while sk_tcplen only tracks progress receiving the current fragment.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/include/linux/sunrpc/svcsock.h b/include/linux/sunrpc/svcsock.h
index 613cf42..62fd1b7 100644
--- a/include/linux/sunrpc/svcsock.h
+++ b/include/linux/sunrpc/svcsock.h
@@ -26,8 +26,15 @@
void (*sk_owspace)(struct sock *);
/* private TCP part */
- __be32 sk_reclen; /* length of record */
- u32 sk_tcplen; /* current read length */
+ /* On-the-wire fragment header: */
+ __be32 sk_reclen;
+ /* As we receive a record, this includes the length received so
+ * far (including the fragment header): */
+ u32 sk_tcplen;
+ /* Total length of the data (not including fragment headers)
+ * received so far in the fragments making up this rpc: */
+ u32 sk_datalen;
+
struct page * sk_pages[RPCSVC_MAXPAGES]; /* received data */
};