int svc_encode_result_payload(struct svc_rqst *rqstp,
unsigned int offset,
unsigned int length);
-unsigned int svc_fill_write_vector(struct svc_rqst *rqstp,
- const struct xdr_buf *payload);
char *svc_fill_symlink_pathname(struct svc_rqst *rqstp,
struct kvec *first, void *p,
size_t total);
}
EXPORT_SYMBOL_GPL(svc_encode_result_payload);
-/**
- * svc_fill_write_vector - Construct data argument for VFS write call
- * @rqstp: svc_rqst to operate on
- * @payload: xdr_buf containing only the write data payload
- *
- * Fills in rqstp::rq_vec, and returns the number of elements.
- */
-unsigned int svc_fill_write_vector(struct svc_rqst *rqstp,
- const struct xdr_buf *payload)
-{
- const struct kvec *first = payload->head;
- struct page **pages = payload->pages;
- struct kvec *vec = rqstp->rq_vec;
- size_t total = payload->len;
- unsigned int i;
-
- /* Some types of transport can present the write payload
- * entirely in rq_arg.pages. In this case, @first is empty.
- */
- i = 0;
- if (first->iov_len) {
- vec[i].iov_base = first->iov_base;
- vec[i].iov_len = min_t(size_t, total, first->iov_len);
- total -= vec[i].iov_len;
- ++i;
- }
-
- while (total) {
- vec[i].iov_base = page_address(*pages);
- vec[i].iov_len = min_t(size_t, total, PAGE_SIZE);
- total -= vec[i].iov_len;
- ++i;
- ++pages;
- }
-
- WARN_ON_ONCE(i > ARRAY_SIZE(rqstp->rq_vec));
- return i;
-}
-EXPORT_SYMBOL_GPL(svc_fill_write_vector);
-
/**
* svc_fill_symlink_pathname - Construct pathname argument for VFS symlink call
* @rqstp: svc_rqst to operate on