+++ /dev/null
-/*-
- * 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 <dirent.h>
-#include <linux/vhost.h>
-#include <linux/virtio_net.h>
-#include <fuse/cuse_lowlevel.h>
-#include <stddef.h>
-#include <string.h>
-#include <stdlib.h>
-#include <sys/eventfd.h>
-#include <sys/mman.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <sys/ioctl.h>
-#include <sys/socket.h>
-#include <linux/if_tun.h>
-#include <linux/if.h>
-#include <errno.h>
-
-#include <rte_log.h>
-
-#include "rte_virtio_net.h"
-#include "vhost-net.h"
-#include "virtio-net-cdev.h"
-#include "eventfd_copy.h"
-
-/* Line size for reading maps file. */
-static const uint32_t BUFSIZE = PATH_MAX;
-
-/* Size of prot char array in procmap. */
-#define PROT_SZ 5
-
-/* Number of elements in procmap struct. */
-#define PROCMAP_SZ 8
-
-/* Structure containing information gathered from maps file. */
-struct procmap {
- uint64_t va_start; /* Start virtual address in file. */
- uint64_t len; /* Size of file. */
- uint64_t pgoff; /* Not used. */
- uint32_t maj; /* Not used. */
- uint32_t min; /* Not used. */
- uint32_t ino; /* Not used. */
- char prot[PROT_SZ]; /* Not used. */
- char fname[PATH_MAX]; /* File name. */
-};
-
-/*
- * Locate the file containing QEMU's memory space and
- * map it to our address space.
- */
-static int
-host_memory_map(pid_t pid, uint64_t addr,
- uint64_t *mapped_address, uint64_t *mapped_size)
-{
- struct dirent *dptr = NULL;
- struct procmap procmap;
- DIR *dp = NULL;
- int fd;
- int i;
- char memfile[PATH_MAX];
- char mapfile[PATH_MAX];
- char procdir[PATH_MAX];
- char resolved_path[PATH_MAX];
- char *path = NULL;
- FILE *fmap;
- void *map;
- uint8_t found = 0;
- char line[BUFSIZE];
- char dlm[] = "- : ";
- char *str, *sp, *in[PROCMAP_SZ];
- char *end = NULL;
-
- /* Path where mem files are located. */
- snprintf(procdir, PATH_MAX, "/proc/%u/fd/", pid);
- /* Maps file used to locate mem file. */
- snprintf(mapfile, PATH_MAX, "/proc/%u/maps", pid);
-
- fmap = fopen(mapfile, "r");
- if (fmap == NULL) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "Failed to open maps file for pid %d\n",
- pid);
- return -1;
- }
-
- /* Read through maps file until we find out base_address. */
- while (fgets(line, BUFSIZE, fmap) != 0) {
- str = line;
- errno = 0;
- /* Split line into fields. */
- for (i = 0; i < PROCMAP_SZ; i++) {
- in[i] = strtok_r(str, &dlm[i], &sp);
- if ((in[i] == NULL) || (errno != 0)) {
- fclose(fmap);
- return -1;
- }
- str = NULL;
- }
-
- /* Convert/Copy each field as needed. */
- procmap.va_start = strtoull(in[0], &end, 16);
- if ((in[0] == '\0') || (end == NULL) || (*end != '\0') ||
- (errno != 0)) {
- fclose(fmap);
- return -1;
- }
-
- procmap.len = strtoull(in[1], &end, 16);
- if ((in[1] == '\0') || (end == NULL) || (*end != '\0') ||
- (errno != 0)) {
- fclose(fmap);
- return -1;
- }
-
- procmap.pgoff = strtoull(in[3], &end, 16);
- if ((in[3] == '\0') || (end == NULL) || (*end != '\0') ||
- (errno != 0)) {
- fclose(fmap);
- return -1;
- }
-
- procmap.maj = strtoul(in[4], &end, 16);
- if ((in[4] == '\0') || (end == NULL) || (*end != '\0') ||
- (errno != 0)) {
- fclose(fmap);
- return -1;
- }
-
- procmap.min = strtoul(in[5], &end, 16);
- if ((in[5] == '\0') || (end == NULL) || (*end != '\0') ||
- (errno != 0)) {
- fclose(fmap);
- return -1;
- }
-
- procmap.ino = strtoul(in[6], &end, 16);
- if ((in[6] == '\0') || (end == NULL) || (*end != '\0') ||
- (errno != 0)) {
- fclose(fmap);
- return -1;
- }
-
- memcpy(&procmap.prot, in[2], PROT_SZ);
- memcpy(&procmap.fname, in[7], PATH_MAX);
-
- if (procmap.va_start == addr) {
- procmap.len = procmap.len - procmap.va_start;
- found = 1;
- break;
- }
- }
- fclose(fmap);
-
- if (!found) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "Failed to find memory file in pid %d maps file\n",
- pid);
- return -1;
- }
-
- /* Find the guest memory file among the process fds. */
- dp = opendir(procdir);
- if (dp == NULL) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "Cannot open pid %d process directory\n",
- pid);
- return -1;
- }
-
- found = 0;
-
- /* Read the fd directory contents. */
- while (NULL != (dptr = readdir(dp))) {
- snprintf(memfile, PATH_MAX, "/proc/%u/fd/%s",
- pid, dptr->d_name);
- path = realpath(memfile, resolved_path);
- if ((path == NULL) && (strlen(resolved_path) == 0)) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "Failed to resolve fd directory\n");
- closedir(dp);
- return -1;
- }
- if (strncmp(resolved_path, procmap.fname,
- strnlen(procmap.fname, PATH_MAX)) == 0) {
- found = 1;
- break;
- }
- }
-
- closedir(dp);
-
- if (found == 0) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "Failed to find memory file for pid %d\n",
- pid);
- return -1;
- }
- /* Open the shared memory file and map the memory into this process. */
- fd = open(memfile, O_RDWR);
-
- if (fd == -1) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "Failed to open %s for pid %d\n",
- memfile, pid);
- return -1;
- }
-
- map = mmap(0, (size_t)procmap.len, PROT_READ|PROT_WRITE,
- MAP_POPULATE|MAP_SHARED, fd, 0);
- close(fd);
-
- if (map == MAP_FAILED) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "Error mapping the file %s for pid %d\n",
- memfile, pid);
- return -1;
- }
-
- /* Store the memory address and size in the device data structure */
- *mapped_address = (uint64_t)(uintptr_t)map;
- *mapped_size = procmap.len;
-
- LOG_DEBUG(VHOST_CONFIG,
- "Mem File: %s->%s - Size: %llu - VA: %p\n",
- memfile, resolved_path,
- (unsigned long long)*mapped_size, map);
-
- return 0;
-}
-
-int
-cuse_set_mem_table(struct vhost_cuse_device_ctx ctx,
- const struct vhost_memory *mem_regions_addr, uint32_t nregions)
-{
- uint64_t size = offsetof(struct vhost_memory, regions);
- uint32_t idx, valid_regions;
- struct virtio_memory_regions *pregion;
- struct vhost_memory_region *mem_regions = (void *)(uintptr_t)
- ((uint64_t)(uintptr_t)mem_regions_addr + size);
- uint64_t base_address = 0, mapped_address, mapped_size;
- struct virtio_net *dev;
-
- dev = get_device(ctx.vid);
- if (dev == NULL)
- return -1;
-
- if (dev->mem && dev->mem->mapped_address) {
- munmap((void *)(uintptr_t)dev->mem->mapped_address,
- (size_t)dev->mem->mapped_size);
- free(dev->mem);
- dev->mem = NULL;
- }
-
- dev->mem = calloc(1, sizeof(struct virtio_memory) +
- sizeof(struct virtio_memory_regions) * nregions);
- if (dev->mem == NULL) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "(%d) failed to allocate memory for dev->mem\n",
- dev->vid);
- return -1;
- }
-
- pregion = &dev->mem->regions[0];
-
- for (idx = 0; idx < nregions; idx++) {
- pregion[idx].guest_phys_address =
- mem_regions[idx].guest_phys_addr;
- pregion[idx].guest_phys_address_end =
- pregion[idx].guest_phys_address +
- mem_regions[idx].memory_size;
- pregion[idx].memory_size =
- mem_regions[idx].memory_size;
- pregion[idx].userspace_address =
- mem_regions[idx].userspace_addr;
-
- LOG_DEBUG(VHOST_CONFIG,
- "REGION: %u - GPA: %p - QVA: %p - SIZE (%"PRIu64")\n",
- idx,
- (void *)(uintptr_t)pregion[idx].guest_phys_address,
- (void *)(uintptr_t)pregion[idx].userspace_address,
- pregion[idx].memory_size);
-
- /*set the base address mapping*/
- if (pregion[idx].guest_phys_address == 0x0) {
- base_address =
- pregion[idx].userspace_address;
- /* Map VM memory file */
- if (host_memory_map(ctx.pid, base_address,
- &mapped_address, &mapped_size) != 0) {
- free(dev->mem);
- dev->mem = NULL;
- return -1;
- }
- dev->mem->mapped_address = mapped_address;
- dev->mem->base_address = base_address;
- dev->mem->mapped_size = mapped_size;
- }
- }
-
- /* Check that we have a valid base address. */
- if (base_address == 0) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "Failed to find base address of qemu memory file.\n");
- free(dev->mem);
- dev->mem = NULL;
- return -1;
- }
-
- valid_regions = nregions;
- for (idx = 0; idx < nregions; idx++) {
- if ((pregion[idx].userspace_address < base_address) ||
- (pregion[idx].userspace_address >
- (base_address + mapped_size)))
- valid_regions--;
- }
-
-
- if (valid_regions != nregions) {
- valid_regions = 0;
- for (idx = nregions; 0 != idx--; ) {
- if ((pregion[idx].userspace_address < base_address) ||
- (pregion[idx].userspace_address >
- (base_address + mapped_size))) {
- memmove(&pregion[idx], &pregion[idx + 1],
- sizeof(struct virtio_memory_regions) *
- valid_regions);
- } else
- valid_regions++;
- }
- }
-
- for (idx = 0; idx < valid_regions; idx++) {
- pregion[idx].address_offset =
- mapped_address - base_address +
- pregion[idx].userspace_address -
- pregion[idx].guest_phys_address;
- }
- dev->mem->nregions = valid_regions;
-
- return 0;
-}
-
-/*
- * Function to get the tap device name from the provided file descriptor and
- * save it in the device structure.
- */
-static int
-get_ifname(int vid, int tap_fd, int pid)
-{
- int fd_tap;
- struct ifreq ifr;
- uint32_t ifr_size;
- int ret;
-
- fd_tap = eventfd_copy(tap_fd, pid);
- if (fd_tap < 0)
- return -1;
-
- ret = ioctl(fd_tap, TUNGETIFF, &ifr);
-
- if (close(fd_tap) < 0)
- RTE_LOG(ERR, VHOST_CONFIG, "(%d) fd close failed\n", vid);
-
- if (ret >= 0) {
- ifr_size = strnlen(ifr.ifr_name, sizeof(ifr.ifr_name));
- vhost_set_ifname(vid, ifr.ifr_name, ifr_size);
- } else
- RTE_LOG(ERR, VHOST_CONFIG,
- "(%d) TUNGETIFF ioctl failed\n", vid);
-
- return 0;
-}
-
-int
-cuse_set_backend(struct vhost_cuse_device_ctx ctx,
- struct vhost_vring_file *file)
-{
- struct virtio_net *dev;
-
- dev = get_device(ctx.vid);
- if (dev == NULL)
- return -1;
-
- if (!(dev->flags & VIRTIO_DEV_RUNNING) && file->fd != VIRTIO_DEV_STOPPED)
- get_ifname(ctx.vid, file->fd, ctx.pid);
-
- return vhost_set_backend(ctx.vid, file);
-}
-
-void
-vhost_backend_cleanup(struct virtio_net *dev)
-{
- /* Unmap QEMU memory file if mapped. */
- if (dev->mem) {
- munmap((void *)(uintptr_t)dev->mem->mapped_address,
- (size_t)dev->mem->mapped_size);
- free(dev->mem);
- dev->mem = NULL;
- }
-}
Code Review / deb_dpdk.git / blobdiff