X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;ds=sidebyside;f=examples%2Fvhost_xen%2Fxenstore_parse.c;fp=examples%2Fvhost_xen%2Fxenstore_parse.c;h=0000000000000000000000000000000000000000;hb=055c52583a2794da8ba1e85a48cce3832372b12f;hp=ab089f1b7f7ba1753d167c04dd1963e99ec32401;hpb=f239aed5e674965691846e8ce3f187dd47523689;p=deb_dpdk.git

diff --git a/examples/vhost_xen/xenstore_parse.c b/examples/vhost_xen/xenstore_parse.c
deleted file mode 100644
index ab089f1b..00000000
--- a/examples/vhost_xen/xenstore_parse.c
+++ /dev/null
@@ -1,775 +0,0 @@
-/*-
- *   BSD LICENSE
- *
- *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- *   All rights reserved.
- *
- *   Redistribution and use in source and binary forms, with or without
- *   modification, are permitted provided that the following conditions
- *   are met:
- *
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above copyright
- *       notice, this list of conditions and the following disclaimer in
- *       the documentation and/or other materials provided with the
- *       distribution.
- *     * Neither the name of Intel Corporation nor the names of its
- *       contributors may be used to endorse or promote products derived
- *       from this software without specific prior written permission.
- *
- *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <stdint.h>
-#include <unistd.h>
-#include <inttypes.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-#include <xen/sys/gntalloc.h>
-#include <xen/sys/gntdev.h>
-#include <xen/xen-compat.h>
-#if __XEN_LATEST_INTERFACE_VERSION__ < 0x00040200
-#include <xs.h>
-#else
-#include <xenstore.h>
-#endif
-
-#include <rte_common.h>
-#include <rte_memory.h>
-#include <rte_eal.h>
-#include <rte_malloc.h>
-#include <rte_string_fns.h>
-#include <rte_log.h>
-#include <rte_debug.h>
-
-#include "xen_vhost.h"
-
-/* xenstore handle */
-static struct xs_handle *xs = NULL;
-
-/* gntdev file descriptor to map grant pages */
-static int d_fd = -1;
-
-/*
- *  The grant node format in xenstore for vring/mpool is like:
- *  idx#_rx_vring_gref = "gref1#, gref2#, gref3#"
- *  idx#_mempool_gref  = "gref1#, gref2#, gref3#"
- *  each gref# is the grant reference for a shared page.
- *  In each shared page, we store the grant_node_item items.
- */
-struct grant_node_item {
-	uint32_t gref;
-	uint32_t pfn;
-} __attribute__((packed));
-
-int cmdline_parse_etheraddr(void *tk, const char *srcbuf,
-	void *res, unsigned ressize);
-
-/* Map grant ref refid at addr_ori*/
-static void *
-xen_grant_mmap(void *addr_ori, int domid, int refid, uint64_t *pindex)
-{
-	struct ioctl_gntdev_map_grant_ref arg;
-	void *addr = NULL;
-	int pg_sz = getpagesize();
-
-	arg.count = 1;
-	arg.refs[0].domid = domid;
-	arg.refs[0].ref = refid;
-
-	int rv = ioctl(d_fd, IOCTL_GNTDEV_MAP_GRANT_REF, &arg);
-	if (rv) {
-		RTE_LOG(ERR, XENHOST, "  %s: (%d,%d) %s (ioctl failed)\n", __func__,
-				domid, refid, strerror(errno));
-		return NULL;
-	}
-
-	if (addr_ori == NULL)
-		addr = mmap(addr_ori, pg_sz, PROT_READ|PROT_WRITE, MAP_SHARED,
-				d_fd, arg.index);
-	else
-		addr = mmap(addr_ori, pg_sz, PROT_READ|PROT_WRITE, MAP_SHARED | MAP_FIXED,
-				d_fd, arg.index);
-
-	if (addr == MAP_FAILED) {
-		RTE_LOG(ERR, XENHOST, "  %s: (%d, %d) %s (map failed)\n", __func__,
-				domid, refid, strerror(errno));
-		return NULL;
-	}
-
-	if (pindex)
-		*pindex = arg.index;
-
-	return addr;
-}
-
-/* Unmap one grant ref, and munmap must be called before this */
-static int
-xen_unmap_grant_ref(uint64_t index)
-{
-	struct ioctl_gntdev_unmap_grant_ref arg;
-	int rv;
-
-	arg.count = 1;
-	arg.index = index;
-	rv = ioctl(d_fd, IOCTL_GNTDEV_UNMAP_GRANT_REF, &arg);
-	if (rv) {
-		RTE_LOG(ERR, XENHOST, "  %s: index 0x%" PRIx64 "unmap failed\n", __func__, index);
-		return -1;
-	}
-	return 0;
-}
-
-/*
- * Reserve a virtual address space.
- * On success, returns the pointer. On failure, returns NULL.
- */
-static void *
-get_xen_virtual(size_t size, size_t page_sz)
-{
-	void *addr;
-	uintptr_t aligned_addr;
-
-	addr = mmap(NULL, size + page_sz, PROT_READ, MAP_SHARED | MAP_ANONYMOUS, -1, 0);
-	if (addr == MAP_FAILED) {
-		RTE_LOG(ERR, XENHOST, "failed get a virtual area\n");
-		return NULL;
-	}
-
-	aligned_addr = RTE_ALIGN_CEIL((uintptr_t)addr, page_sz);
-	munmap(addr, aligned_addr - (uintptr_t)addr);
-	munmap((void *)(aligned_addr + size), page_sz + (uintptr_t)addr - aligned_addr);
-	addr = (void *)(aligned_addr);
-
-	return addr;
-}
-
-static void
-free_xen_virtual(void *addr, size_t size, size_t page_sz __rte_unused)
-{
-	if (addr)
-		munmap(addr, size);
-}
-
-/*
- * Returns val str in xenstore.
- * @param path
- *  Full path string for key
- * @return
- *  Pointer to Val str, NULL on failure
- */
-static char *
-xen_read_node(char *path, uint32_t *len)
-{
-	char *buf;
-
-	buf = xs_read(xs, XBT_NULL, path, len);
-	return buf;
-}
-
-static int
-cal_pagenum(struct xen_gnt *gnt)
-{
-	unsigned int i;
-	/*
-	 * the items in the page are in the format of
-	 * gref#,pfn#,...,gref#,pfn#
-	 * FIXME, 0 is reserved by system, use it as terminator.
-	 */
-	for (i = 0; i < (PAGE_PFNNUM) / 2; i++) {
-		if (gnt->gref_pfn[i * 2].gref <= 0)
-			break;
-	}
-
-	return i;
-}
-
-/* Frees memory allocated to a grant node */
-static void
-xen_free_gntnode(struct xen_gntnode *gntnode)
-{
-	if (gntnode == NULL)
-		return;
-	free(gntnode->gnt_info);
-	free(gntnode);
-}
-
-/*
- * Parse a grant node.
- * @param domid
- *  Guest domain id.
- * @param path
- *  Full path string for a grant node, like for the following (key, val) pair
- *  idx#_mempool_gref = "gref#, gref#, gref#"
- *  path = 'local/domain/domid/control/dpdk/idx#_mempool_gref'
- *  gref# is a shared page contain packed (gref,pfn) entries
- * @return
- *  Returns the pointer to xen_gntnode
- */
-static struct xen_gntnode *
-parse_gntnode(int dom_id, char *path)
-{
-	char **gref_list = NULL;
-	uint32_t i, len, gref_num;
-	void *addr = NULL;
-	char *buf = NULL;
-	struct xen_gntnode *gntnode = NULL;
-	struct xen_gnt *gnt = NULL;
-	int pg_sz = getpagesize();
-	char *end;
-	uint64_t index;
-
-	if ((buf = xen_read_node(path, &len)) == NULL)
-		goto err;
-
-	gref_list = malloc(MAX_GREF_PER_NODE * sizeof(char *));
-	if (gref_list == NULL)
-		goto err;
-
-	gref_num = rte_strsplit(buf, len, gref_list, MAX_GREF_PER_NODE,
-			XEN_GREF_SPLITTOKEN);
-	if (gref_num == 0) {
-		RTE_LOG(ERR, XENHOST, "  %s: invalid grant node format\n", __func__);
-		goto err;
-	}
-
-	gntnode = calloc(1, sizeof(struct xen_gntnode));
-	gnt = calloc(gref_num, sizeof(struct xen_gnt));
-	if (gnt == NULL || gntnode == NULL)
-		goto err;
-
-	for (i = 0; i < gref_num; i++) {
-		errno = 0;
-		gnt[i].gref = strtol(gref_list[i], &end, 0);
-		if (errno != 0 || end == NULL || end == gref_list[i] ||
-			(*end != '\0' &&  *end != XEN_GREF_SPLITTOKEN)) {
-			RTE_LOG(ERR, XENHOST, "  %s: parse grant node item failed\n", __func__);
-			goto err;
-		}
-		addr = xen_grant_mmap(NULL, dom_id, gnt[i].gref, &index);
-		if (addr == NULL) {
-			RTE_LOG(ERR, XENHOST, "  %s: map gref %u failed\n", __func__, gnt[i].gref);
-			goto err;
-		}
-		RTE_LOG(INFO, XENHOST, "      %s: map gref %u to %p\n", __func__, gnt[i].gref, addr);
-		memcpy(gnt[i].gref_pfn, addr, pg_sz);
-		if (munmap(addr, pg_sz)) {
-			RTE_LOG(INFO, XENHOST, "  %s: unmap gref %u failed\n", __func__, gnt[i].gref);
-			goto err;
-		}
-		if (xen_unmap_grant_ref(index)) {
-			RTE_LOG(INFO, XENHOST, "  %s: release gref %u failed\n", __func__, gnt[i].gref);
-			goto err;
-		}
-
-	}
-
-	gntnode->gnt_num  = gref_num;
-	gntnode->gnt_info = gnt;
-
-	free(buf);
-	free(gref_list);
-	return gntnode;
-
-err:
-	free(gnt);
-	free(gntnode);
-	free(gref_list);
-	free(buf);
-	return NULL;
-}
-
-/*
- * This function maps grant node of vring or mbuf pool to a continuous virtual address space,
- * and returns mapped address, pfn array, index array
- * @param gntnode
- *  Pointer to grant node
- * @param domid
- *  Guest domain id
- * @param ppfn
- *  Pointer to pfn array, caller should free this array
- * @param pgs
- *  Pointer to number of pages
- * @param ppindex
- *  Pointer to index array, used to release grefs when to free this node
- * @return
- *  Pointer to mapped virtual address, NULL on failure
- */
-static void *
-map_gntnode(struct xen_gntnode *gntnode, int domid, uint32_t **ppfn, uint32_t *pgs, uint64_t **ppindex)
-{
-	struct xen_gnt *gnt;
-	uint32_t i, j;
-	size_t total_pages = 0;
-	void *addr;
-	uint32_t *pfn;
-	uint64_t *pindex;
-	uint32_t pfn_num = 0;
-	int pg_sz;
-
-	if (gntnode == NULL)
-		return NULL;
-
-	pg_sz = getpagesize();
-	for (i = 0; i < gntnode->gnt_num; i++) {
-		gnt = gntnode->gnt_info + i;
-		total_pages += cal_pagenum(gnt);
-	}
-	if ((addr = get_xen_virtual(total_pages * pg_sz, pg_sz)) == NULL) {
-		RTE_LOG(ERR, XENHOST, "  %s: failed get_xen_virtual\n", __func__);
-		return NULL;
-	}
-	pfn = calloc(total_pages, (size_t)sizeof(uint32_t));
-	pindex = calloc(total_pages, (size_t)sizeof(uint64_t));
-	if (pfn == NULL || pindex == NULL) {
-		free_xen_virtual(addr, total_pages * pg_sz, pg_sz);
-		free(pfn);
-		free(pindex);
-		return NULL;
-	}
-
-	RTE_LOG(INFO, XENHOST, "    %s: total pages:%zu, map to [%p, %p]\n", __func__, total_pages, addr, RTE_PTR_ADD(addr, total_pages * pg_sz - 1));
-	for (i = 0; i < gntnode->gnt_num; i++) {
-		gnt = gntnode->gnt_info + i;
-		for (j = 0; j < (PAGE_PFNNUM) / 2; j++) {
-			if ((gnt->gref_pfn[j * 2].gref) <= 0)
-				goto _end;
-			/*alternative: batch map, or through libxc*/
-			if (xen_grant_mmap(RTE_PTR_ADD(addr, pfn_num * pg_sz),
-					domid,
-					gnt->gref_pfn[j * 2].gref,
-					&pindex[pfn_num]) == NULL) {
-				goto mmap_failed;
-			}
-			pfn[pfn_num] = gnt->gref_pfn[j * 2 + 1].pfn_num;
-			pfn_num++;
-		}
-	}
-
-mmap_failed:
-	if (pfn_num)
-		munmap(addr, pfn_num * pg_sz);
-	for (i = 0; i < pfn_num; i++) {
-		xen_unmap_grant_ref(pindex[i]);
-	}
-	free(pindex);
-	free(pfn);
-	return NULL;
-
-_end:
-	if (ppindex)
-		*ppindex = pindex;
-	else
-		free(pindex);
-	if (ppfn)
-		*ppfn = pfn;
-	else
-		free(pfn);
-	if (pgs)
-		*pgs = total_pages;
-
-	return addr;
-}
-
-static int
-parse_mpool_va(struct xen_mempool *mempool)
-{
-	char path[PATH_MAX] = {0};
-	char *buf;
-	uint32_t len;
-	char *end;
-	int ret = -1;
-
-	errno = 0;
-	snprintf(path, sizeof(path),
-		XEN_VM_ROOTNODE_FMT"/%d_"XEN_GVA_SUFFIX,
-		mempool->dom_id, mempool->pool_idx);
-
-	if((buf = xen_read_node(path, &len)) == NULL)
-		goto out;
-	mempool->gva = (void *)strtoul(buf, &end, 16);
-	if (errno != 0 || end == NULL || end == buf || *end != '\0') {
-		mempool->gva = NULL;
-		goto out;
-	}
-	ret = 0;
-out:
-	free(buf);
-	return ret;
-}
-
-/*
- * map mbuf pool
- */
-static int
-map_mempoolnode(struct xen_gntnode *gntnode,
-			struct xen_mempool *mempool)
-{
-	if (gntnode == NULL || mempool == NULL)
-		return -1;
-
-	mempool->hva =
-		map_gntnode(gntnode, mempool->dom_id, &mempool->mempfn_tbl, &mempool->mempfn_num, &mempool->pindex);
-
-	RTE_LOG(INFO, XENHOST, "  %s: map mempool at %p\n", __func__, (void *)mempool->hva);
-	if (mempool->hva)
-		return 0;
-	else {
-		return -1;
-	}
-}
-
-void
-cleanup_mempool(struct xen_mempool *mempool)
-{
-	int pg_sz = getpagesize();
-	uint32_t i;
-
-	if (mempool->hva)
-		munmap(mempool->hva, mempool->mempfn_num * pg_sz);
-	mempool->hva = NULL;
-
-	if (mempool->pindex) {
-		RTE_LOG(INFO, XENHOST, "  %s: unmap dom %02u mempool%02u %u grefs\n",
-			__func__,
-			mempool->dom_id,
-			mempool->pool_idx,
-			mempool->mempfn_num);
-		for (i = 0; i < mempool->mempfn_num; i ++) {
-			xen_unmap_grant_ref(mempool->pindex[i]);
-		}
-	}
-	mempool->pindex = NULL;
-
-	free(mempool->mempfn_tbl);
-	mempool->mempfn_tbl = NULL;
-}
-
-/*
- * process mempool node idx#_mempool_gref, idx = 0, 1, 2...
- * until we encounter a node that doesn't exist.
- */
-int
-parse_mempoolnode(struct xen_guest *guest)
-{
-	uint32_t i, len;
-	char path[PATH_MAX] = {0};
-	struct xen_gntnode *gntnode = NULL;
-	struct xen_mempool *mempool = NULL;
-	char *buf;
-
-	bzero(&guest->mempool, MAX_XENVIRT_MEMPOOL * sizeof(guest->mempool[0]));
-	guest->pool_num = 0;
-
-	while (1) {
-		/* check if null terminated */
-		snprintf(path, sizeof(path),
-			XEN_VM_ROOTNODE_FMT"/%d_"XEN_MEMPOOL_SUFFIX,
-			guest->dom_id,
-			guest->pool_num);
-
-		if ((buf = xen_read_node(path, &len)) != NULL) {
-			/* this node exists */
-			free(buf);
-		} else {
-			if (guest->pool_num == 0) {
-				RTE_LOG(ERR, PMD, "no mempool found\n");
-				return -1;
-			}
-			break;
-		}
-
-		mempool = &guest->mempool[guest->pool_num];
-		mempool->dom_id = guest->dom_id;
-		mempool->pool_idx = guest->pool_num;
-
-		RTE_LOG(INFO, XENHOST, "  %s: mempool %u parse gntnode %s\n", __func__, guest->pool_num, path);
-		gntnode = parse_gntnode(guest->dom_id, path);
-		if (gntnode == NULL)
-			goto err;
-
-		if (parse_mpool_va(mempool))
-			goto err;
-
-		RTE_LOG(INFO, XENHOST, "  %s: mempool %u map gntnode %s\n", __func__, guest->pool_num, path);
-		if (map_mempoolnode(gntnode, mempool))
-			goto err;
-
-		xen_free_gntnode(gntnode);
-		guest->pool_num++;
-	}
-
-	return 0;
-err:
-	if (gntnode)
-		xen_free_gntnode(gntnode);
-	for (i = 0; i <  MAX_XENVIRT_MEMPOOL ; i++) {
-		cleanup_mempool(&guest->mempool[i]);
-	}
-	/* reinitialise mempool */
-	bzero(&guest->mempool, MAX_XENVIRT_MEMPOOL * sizeof(guest->mempool[0]));
-	return -1;
-}
-
-static int
-xen_map_vringflag(struct xen_vring *vring)
-{
-	char path[PATH_MAX] = {0};
-	char *buf;
-	uint32_t len,gref;
-	int pg_sz = getpagesize();
-	char *end;
-
-	snprintf(path, sizeof(path),
-		XEN_VM_ROOTNODE_FMT"/%d_"XEN_VRINGFLAG_SUFFIX,
-		vring->dom_id, vring->virtio_idx);
-
-	if((buf = xen_read_node(path, &len)) == NULL)
-		goto err;
-
-	errno = 0;
-	gref = strtol(buf, &end, 0);
-	if (errno != 0 || end == NULL || end == buf) {
-		goto err;
-	}
-	vring->flag = xen_grant_mmap(0, vring->dom_id, gref, &vring->flag_index);
-	if (vring->flag == NULL || *vring->flag == 0)
-		goto err;
-
-	free(buf);
-	return 0;
-err:
-	free(buf);
-	if (vring->flag) {
-		munmap(vring->flag, pg_sz);
-		vring->flag = NULL;
-		xen_unmap_grant_ref(vring->flag_index);
-	}
-	return -1;
-}
-
-
-static int
-xen_map_rxvringnode(struct xen_gntnode *gntnode,
-				struct xen_vring *vring)
-{
-	vring->rxvring_addr =
-		map_gntnode(gntnode, vring->dom_id, &vring->rxpfn_tbl, &vring->rxpfn_num, &vring->rx_pindex);
-	RTE_LOG(INFO, XENHOST, "  %s: map rx vring at %p\n", __func__, (void *)vring->rxvring_addr);
-	if (vring->rxvring_addr)
-		return 0;
-	else
-		return -1;
-}
-
-static int
-xen_map_txvringnode(struct xen_gntnode *gntnode,
-				struct xen_vring *vring)
-{
-	vring->txvring_addr =
-		map_gntnode(gntnode, vring->dom_id, &vring->txpfn_tbl, &vring->txpfn_num, &vring->tx_pindex);
-	RTE_LOG(INFO, XENHOST, "  %s: map tx vring at %p\n", __func__, (void *)vring->txvring_addr);
-	if (vring->txvring_addr)
-		return 0;
-	else
-		return -1;
-}
-
-void
-cleanup_vring(struct xen_vring *vring)
-{
-	int pg_sz = getpagesize();
-	uint32_t i;
-
-	RTE_LOG(INFO, XENHOST, "  %s: cleanup dom %u vring %u\n", __func__, vring->dom_id, vring->virtio_idx);
-	if (vring->rxvring_addr) {
-		munmap(vring->rxvring_addr, vring->rxpfn_num * pg_sz);
-		RTE_LOG(INFO, XENHOST, "  %s: unmap rx vring [%p, %p]\n",
-			__func__,
-			vring->rxvring_addr,
-			RTE_PTR_ADD(vring->rxvring_addr,
-			vring->rxpfn_num * pg_sz - 1));
-	}
-	vring->rxvring_addr = NULL;
-
-
-	if (vring->rx_pindex) {
-		RTE_LOG(INFO, XENHOST, "  %s: unmap rx vring %u grefs\n", __func__, vring->rxpfn_num);
-		for (i = 0; i < vring->rxpfn_num; i++) {
-			xen_unmap_grant_ref(vring->rx_pindex[i]);
-		}
-	}
-	vring->rx_pindex = NULL;
-
-	free(vring->rxpfn_tbl);
-	vring->rxpfn_tbl = NULL;
-
-	if (vring->txvring_addr) {
-		munmap(vring->txvring_addr, vring->txpfn_num * pg_sz);
-		RTE_LOG(INFO, XENHOST, "  %s: unmap tx vring [%p, %p]\n",
-			__func__,
-			vring->txvring_addr,
-			RTE_PTR_ADD(vring->txvring_addr,
-			vring->txpfn_num * pg_sz - 1));
-	}
-	vring->txvring_addr = NULL;
-
-	if (vring->tx_pindex) {
-		RTE_LOG(INFO, XENHOST, "  %s: unmap tx vring %u grefs\n", __func__, vring->txpfn_num);
-		for (i = 0; i < vring->txpfn_num; i++) {
-			xen_unmap_grant_ref(vring->tx_pindex[i]);
-		}
-	}
-	vring->tx_pindex = NULL;
-
-	free(vring->txpfn_tbl);
-	vring->txpfn_tbl = NULL;
-
-	if (vring->flag) {
-		if (!munmap((void *)vring->flag, pg_sz))
-			RTE_LOG(INFO, XENHOST, "  %s: unmap flag page at %p\n", __func__, vring->flag);
-		if (!xen_unmap_grant_ref(vring->flag_index))
-			RTE_LOG(INFO, XENHOST, "  %s: release flag ref index 0x%" PRIx64 "\n", __func__, vring->flag_index);
-	}
-	vring->flag = NULL;
-	return;
-}
-
-
-
-static int
-xen_parse_etheraddr(struct xen_vring *vring)
-{
-	char path[PATH_MAX] = {0};
-	char *buf;
-	uint32_t len;
-	int ret = -1;
-
-	snprintf(path, sizeof(path),
-		XEN_VM_ROOTNODE_FMT"/%d_"XEN_ADDR_SUFFIX,
-		vring->dom_id, vring->virtio_idx);
-
-	if ((buf = xen_read_node(path, &len)) == NULL)
-		goto out;
-
-	if (cmdline_parse_etheraddr(NULL, buf, &vring->addr,
-			sizeof(vring->addr)) < 0)
-		goto out;
-	ret = 0;
-out:
-	free(buf);
-	return ret;
-}
-
-
-int
-parse_vringnode(struct xen_guest *guest, uint32_t virtio_idx)
-{
-	char path[PATH_MAX] = {0};
-	struct xen_gntnode *rx_gntnode = NULL;
-	struct xen_gntnode *tx_gntnode = NULL;
-	struct xen_vring *vring = NULL;
-
-	/*check if null terminated */
-	snprintf(path, sizeof(path),
-		XEN_VM_ROOTNODE_FMT"/%d_"XEN_RXVRING_SUFFIX,
-		guest->dom_id,
-		virtio_idx);
-
-	RTE_LOG(INFO, XENHOST, "  %s: virtio %u parse rx gntnode %s\n", __func__, virtio_idx, path);
-	rx_gntnode = parse_gntnode(guest->dom_id, path);
-	if (rx_gntnode == NULL)
-		goto err;
-
-	/*check if null terminated */
-	snprintf(path, sizeof(path),
-		XEN_VM_ROOTNODE_FMT"/%d_"XEN_TXVRING_SUFFIX,
-		guest->dom_id,
-		virtio_idx);
-
-	RTE_LOG(INFO, XENHOST, "  %s: virtio %u parse tx gntnode %s\n", __func__, virtio_idx, path);
-	tx_gntnode = parse_gntnode(guest->dom_id, path);
-	if (tx_gntnode == NULL)
-		goto err;
-
-	vring = &guest->vring[virtio_idx];
-	bzero(vring, sizeof(*vring));
-	vring->dom_id = guest->dom_id;
-	vring->virtio_idx = virtio_idx;
-
-	if (xen_parse_etheraddr(vring) != 0)
-		goto err;
-
-	RTE_LOG(INFO, XENHOST, "  %s: virtio %u map rx gntnode %s\n", __func__, virtio_idx, path);
-	if (xen_map_rxvringnode(rx_gntnode, vring) != 0)
-		goto err;
-
-	RTE_LOG(INFO, XENHOST, "  %s: virtio %u map tx gntnode %s\n", __func__, virtio_idx, path);
-	if (xen_map_txvringnode(tx_gntnode, vring) != 0)
-		goto err;
-
-	if (xen_map_vringflag(vring) != 0)
-		goto err;
-
-	guest->vring_num++;
-
-	xen_free_gntnode(rx_gntnode);
-	xen_free_gntnode(tx_gntnode);
-
-	return 0;
-
-err:
-	if (rx_gntnode)
-		xen_free_gntnode(rx_gntnode);
-	if (tx_gntnode)
-		xen_free_gntnode(tx_gntnode);
-	if (vring) {
-		cleanup_vring(vring);
-		bzero(vring, sizeof(*vring));
-	}
-	return -1;
-}
-
-/*
- * Open xen grant dev driver
- * @return
- *  0 on success, -1 on failure.
- */
-static int
-xen_grant_init(void)
-{
-	d_fd = open(XEN_GNTDEV_FNAME, O_RDWR);
-
-	return d_fd == -1? (-1): (0);
-}
-
-/*
- * Initialise xenstore handle and open grant dev driver.
- * @return
- *  0 on success, -1 on failure.
- */
-int
-xenhost_init(void)
-{
-	xs = xs_daemon_open();
-	if (xs == NULL) {
-		rte_panic("failed initialize xen daemon handler");
-		return -1;
-	}
-	if (xen_grant_init())
-		return -1;
-	return 0;
-}