diff options
Diffstat (limited to 'examples/vhost_xen/xenstore_parse.c')
| -rw-r--r-- | examples/vhost_xen/xenstore_parse.c | 775 |
1 files changed, 775 insertions, 0 deletions
diff --git a/examples/vhost_xen/xenstore_parse.c b/examples/vhost_xen/xenstore_parse.c new file mode 100644 index 00000000..26d24320 --- /dev/null +++ b/examples/vhost_xen/xenstore_parse.c @@ -0,0 +1,775 @@ +/*- + * 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 continous 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... + * untill 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; +} |