C++ (Cpp) xdr_set_scratch_buffer Examples

Example #1

File: gss_rpc_xdr.c Project: Lyude/linux

int gssx_dec_accept_sec_context(struct rpc_rqst *rqstp,
				struct xdr_stream *xdr,
				void *data)
{
	struct gssx_res_accept_sec_context *res = data;
	u32 value_follows;
	int err;
	struct page *scratch;

	scratch = alloc_page(GFP_KERNEL);
	if (!scratch)
		return -ENOMEM;
	xdr_set_scratch_buffer(xdr, page_address(scratch), PAGE_SIZE);

	/* res->status */
	err = gssx_dec_status(xdr, &res->status);
	if (err)
		goto out_free;

	/* res->context_handle */
	err = gssx_dec_bool(xdr, &value_follows);
	if (err)
		goto out_free;
	if (value_follows) {
		err = gssx_dec_ctx(xdr, res->context_handle);
		if (err)
			goto out_free;
	} else {
		res->context_handle = NULL;
	}

	/* res->output_token */
	err = gssx_dec_bool(xdr, &value_follows);
	if (err)
		goto out_free;
	if (value_follows) {
		err = gssx_dec_buffer(xdr, res->output_token);
		if (err)
			goto out_free;
	} else {
		res->output_token = NULL;
	}

	/* res->delegated_cred_handle */
	err = gssx_dec_bool(xdr, &value_follows);
	if (err)
		goto out_free;
	if (value_follows) {
		/* we do not support upcall servers sending this data. */
		err = -EINVAL;
		goto out_free;
	}

	/* res->options */
	err = gssx_dec_option_array(xdr, &res->options);

out_free:
	__free_page(scratch);
	return err;
}

Example #2

File: objlayout.c Project: ARMWorks/FA_2451_Linux_Kernel

/*
 * Unmarshall layout and store it in pnfslay.
 */
struct pnfs_layout_segment *
objlayout_alloc_lseg(struct pnfs_layout_hdr *pnfslay,
		     struct nfs4_layoutget_res *lgr,
		     gfp_t gfp_flags)
{
	int status = -ENOMEM;
	struct xdr_stream stream;
	struct xdr_buf buf = {
		.pages =  lgr->layoutp->pages,
		.page_len =  lgr->layoutp->len,
		.buflen =  lgr->layoutp->len,
		.len = lgr->layoutp->len,
	};
	struct page *scratch;
	struct pnfs_layout_segment *lseg;

	dprintk("%s: Begin pnfslay %p\n", __func__, pnfslay);

	scratch = alloc_page(gfp_flags);
	if (!scratch)
		goto err_nofree;

	xdr_init_decode(&stream, &buf, NULL);
	xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE);

	status = objio_alloc_lseg(&lseg, pnfslay, &lgr->range, &stream, gfp_flags);
	if (unlikely(status)) {
		dprintk("%s: objio_alloc_lseg Return err %d\n", __func__,
			status);
		goto err;
	}

	__free_page(scratch);

	dprintk("%s: Return %p\n", __func__, lseg);
	return lseg;

err:
	__free_page(scratch);
err_nofree:
	dprintk("%s: Err Return=>%d\n", __func__, status);
	return ERR_PTR(status);
}

/*
 * Free a layout segement
 */
void
objlayout_free_lseg(struct pnfs_layout_segment *lseg)
{
	dprintk("%s: freeing layout segment %p\n", __func__, lseg);

	if (unlikely(!lseg))
		return;

	objio_free_lseg(lseg);
}

Example #3

File: dev.c Project: AK101111/linux

struct nfs4_deviceid_node *
bl_alloc_deviceid_node(struct nfs_server *server, struct pnfs_device *pdev,
		gfp_t gfp_mask)
{
	struct nfs4_deviceid_node *node = NULL;
	struct pnfs_block_volume *volumes;
	struct pnfs_block_dev *top;
	struct xdr_stream xdr;
	struct xdr_buf buf;
	struct page *scratch;
	int nr_volumes, ret, i;
	__be32 *p;

	scratch = alloc_page(gfp_mask);
	if (!scratch)
		goto out;

	xdr_init_decode_pages(&xdr, &buf, pdev->pages, pdev->pglen);
	xdr_set_scratch_buffer(&xdr, page_address(scratch), PAGE_SIZE);

	p = xdr_inline_decode(&xdr, sizeof(__be32));
	if (!p)
		goto out_free_scratch;
	nr_volumes = be32_to_cpup(p++);

	volumes = kcalloc(nr_volumes, sizeof(struct pnfs_block_volume),
			  gfp_mask);
	if (!volumes)
		goto out_free_scratch;

	for (i = 0; i < nr_volumes; i++) {
		ret = nfs4_block_decode_volume(&xdr, &volumes[i]);
		if (ret < 0)
			goto out_free_volumes;
	}

	top = kzalloc(sizeof(*top), gfp_mask);
	if (!top)
		goto out_free_volumes;

	ret = bl_parse_deviceid(server, top, volumes, nr_volumes - 1, gfp_mask);
	if (ret) {
		bl_free_device(top);
		kfree(top);
		goto out_free_volumes;
	}

	node = &top->node;
	nfs4_init_deviceid_node(node, server, &pdev->dev_id);

out_free_volumes:
	kfree(volumes);
out_free_scratch:
	__free_page(scratch);
out:
	return node;
}