mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-03 23:58:05 +00:00
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>
This commit is contained in:
parent
f7d61ee414
commit
cf1f08cac3
2 changed files with 14 additions and 0 deletions
|
@ -240,6 +240,7 @@ extern int xdr_restrict_buflen(struct xdr_stream *xdr, int newbuflen);
|
||||||
extern void xdr_write_pages(struct xdr_stream *xdr, struct page **pages,
|
extern void xdr_write_pages(struct xdr_stream *xdr, struct page **pages,
|
||||||
unsigned int base, unsigned int len);
|
unsigned int base, unsigned int len);
|
||||||
extern unsigned int xdr_stream_pos(const struct xdr_stream *xdr);
|
extern unsigned int xdr_stream_pos(const struct xdr_stream *xdr);
|
||||||
|
extern unsigned int xdr_page_pos(const struct xdr_stream *xdr);
|
||||||
extern void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf,
|
extern void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf,
|
||||||
__be32 *p, struct rpc_rqst *rqst);
|
__be32 *p, struct rpc_rqst *rqst);
|
||||||
extern void xdr_init_decode_pages(struct xdr_stream *xdr, struct xdr_buf *buf,
|
extern void xdr_init_decode_pages(struct xdr_stream *xdr, struct xdr_buf *buf,
|
||||||
|
|
|
@ -505,6 +505,19 @@ unsigned int xdr_stream_pos(const struct xdr_stream *xdr)
|
||||||
}
|
}
|
||||||
EXPORT_SYMBOL_GPL(xdr_stream_pos);
|
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_init_encode - Initialize a struct xdr_stream for sending data.
|
||||||
* @xdr: pointer to xdr_stream struct
|
* @xdr: pointer to xdr_stream struct
|
||||||
|
|
Loading…
Reference in a new issue