diff options
| author | Trond Myklebust <trond.myklebust@hammerspace.com> | 2018-09-13 12:22:04 -0400 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2018-09-30 15:35:16 -0400 |
| commit | 9d96acbc7f376dc1ffcedca0c349dd3389187a38 (patch) | |
| tree | 7c3c3a899f9beee854ed00b547455b6a6e7d1b02 /include/linux/sunrpc/xdr.h | |
| parent | 431f6eb3570f286036bc8718a908a283f5d99473 (diff) | |
SUNRPC: Add a bvec array to struct xdr_buf for use with iovec_iter()
Add a bvec array to struct xdr_buf, and have the client allocate it
when we need to receive data into pages.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'include/linux/sunrpc/xdr.h')
| -rw-r--r-- | include/linux/sunrpc/xdr.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/sunrpc/xdr.h b/include/linux/sunrpc/xdr.h index 431829233392..745587132a87 100644 --- a/include/linux/sunrpc/xdr.h +++ b/include/linux/sunrpc/xdr.h @@ -18,6 +18,7 @@ #include <asm/unaligned.h> #include <linux/scatterlist.h> +struct bio_vec; struct rpc_rqst; /* @@ -52,6 +53,7 @@ struct xdr_buf { struct kvec head[1], /* RPC header + non-page data */ tail[1]; /* Appended after page data */ + struct bio_vec *bvec; struct page ** pages; /* Array of pages */ unsigned int page_base, /* Start of page data */ page_len, /* Length of page data */ @@ -70,6 +72,8 @@ xdr_buf_init(struct xdr_buf *buf, void *start, size_t len) buf->head[0].iov_base = start; buf->head[0].iov_len = len; buf->tail[0].iov_len = 0; + buf->bvec = NULL; + buf->pages = NULL; buf->page_len = 0; buf->flags = 0; buf->len = 0; @@ -116,6 +120,9 @@ __be32 *xdr_decode_netobj(__be32 *p, struct xdr_netobj *); void xdr_inline_pages(struct xdr_buf *, unsigned int, struct page **, unsigned int, unsigned int); void xdr_terminate_string(struct xdr_buf *, const u32); +size_t xdr_buf_pagecount(struct xdr_buf *buf); +int xdr_alloc_bvec(struct xdr_buf *buf, gfp_t gfp); +void xdr_free_bvec(struct xdr_buf *buf); static inline __be32 *xdr_encode_array(__be32 *p, const void *s, unsigned int len) { |