diff options
| author |   Anna Schumaker <Anna.Schumaker@Netapp.com> | 2020-04-17 11:00:24 -0400 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2020-10-07 14:28:39 -0400 |
| commit | cf1f08cac375630af6b6307907a3fc20fcf847c7 (patch) | |
| tree | 0158e4b775cbd92951c89de52f027e1503ec742f /net/sunrpc/xdr.c | |
| parent | SUNRPC: Split out a function for setting current page (diff) | |
| download | linux-dev-cf1f08cac375630af6b6307907a3fc20fcf847c7.tar.xz linux-dev-cf1f08cac375630af6b6307907a3fc20fcf847c7.zip | |
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/xdr.c')
| -rw-r--r-- | net/sunrpc/xdr.c | 13 |
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 |