diff options
Diffstat (limited to 'examples/vhost_xen/xenstore_parse.c')
| -rw-r--r-- | examples/vhost_xen/xenstore_parse.c | 775 |
1 files changed, 0 insertions, 775 deletions
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; -} |