Commit 4517d526c8aa31b5c14165ef180cc19518ff0a35
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SUNRPC: Add the helper xdr_stream_pos
Add a helper to report the current offset from the start of the xdr_stream. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Showing 2 changed files with 11 additions and 0 deletions Side-by-side Diff
include/linux/sunrpc/xdr.h
| ... | ... | @@ -218,6 +218,7 @@ |
| 218 | 218 | extern __be32 *xdr_reserve_space(struct xdr_stream *xdr, size_t nbytes); |
| 219 | 219 | extern void xdr_write_pages(struct xdr_stream *xdr, struct page **pages, |
| 220 | 220 | unsigned int base, unsigned int len); |
| 221 | +extern unsigned int xdr_stream_pos(const struct xdr_stream *xdr); | |
| 221 | 222 | extern void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p); |
| 222 | 223 | extern void xdr_init_decode_pages(struct xdr_stream *xdr, struct xdr_buf *buf, |
| 223 | 224 | struct page **pages, unsigned int len); |
net/sunrpc/xdr.c
| ... | ... | @@ -455,6 +455,16 @@ |
| 455 | 455 | EXPORT_SYMBOL_GPL(xdr_shift_buf); |
| 456 | 456 | |
| 457 | 457 | /** |
| 458 | + * xdr_stream_pos - Return the current offset from the start of the xdr_stream | |
| 459 | + * @xdr: pointer to struct xdr_stream | |
| 460 | + */ | |
| 461 | +unsigned int xdr_stream_pos(const struct xdr_stream *xdr) | |
| 462 | +{ | |
| 463 | + return (unsigned int)(XDR_QUADLEN(xdr->buf->len) - xdr->nwords) << 2; | |
| 464 | +} | |
| 465 | +EXPORT_SYMBOL_GPL(xdr_stream_pos); | |
| 466 | + | |
| 467 | +/** | |
| 458 | 468 | * xdr_init_encode - Initialize a struct xdr_stream for sending data. |
| 459 | 469 | * @xdr: pointer to xdr_stream struct |
| 460 | 470 | * @buf: pointer to XDR buffer in which to encode data |