diff options
Diffstat (limited to 'lib/librte_vhost/vhost_cuse')
| -rw-r--r-- | lib/librte_vhost/vhost_cuse/eventfd_copy.c | 104 | ||||
| -rw-r--r-- | lib/librte_vhost/vhost_cuse/eventfd_copy.h | 45 | ||||
| -rw-r--r-- | lib/librte_vhost/vhost_cuse/vhost-net-cdev.c | 431 | ||||
| -rw-r--r-- | lib/librte_vhost/vhost_cuse/virtio-net-cdev.c | 433 | ||||
| -rw-r--r-- | lib/librte_vhost/vhost_cuse/virtio-net-cdev.h | 56 |
5 files changed, 0 insertions, 1069 deletions
diff --git a/lib/librte_vhost/vhost_cuse/eventfd_copy.c b/lib/librte_vhost/vhost_cuse/eventfd_copy.c deleted file mode 100644 index 154b32a4..00000000 --- a/lib/librte_vhost/vhost_cuse/eventfd_copy.c +++ /dev/null @@ -1,104 +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 <unistd.h> -#include <sys/eventfd.h> -#include <sys/ioctl.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> - -#include <rte_log.h> - -#include "eventfd_link/eventfd_link.h" -#include "eventfd_copy.h" -#include "vhost-net.h" - -static const char eventfd_cdev[] = "/dev/eventfd-link"; - -static int eventfd_link = -1; - -int -eventfd_init(void) -{ - if (eventfd_link >= 0) - return 0; - - eventfd_link = open(eventfd_cdev, O_RDWR); - if (eventfd_link < 0) { - RTE_LOG(ERR, VHOST_CONFIG, - "eventfd_link module is not loaded\n"); - return -1; - } - - return 0; -} - -int -eventfd_free(void) -{ - if (eventfd_link >= 0) - close(eventfd_link); - return 0; -} - -/* - * This function uses the eventfd_link kernel module to copy an eventfd file - * descriptor provided by QEMU in to our process space. - */ -int -eventfd_copy(int target_fd, int target_pid) -{ - int ret; - struct eventfd_copy2 eventfd_copy2; - - - /* Open the character device to the kernel module. */ - /* TODO: check this earlier rather than fail until VM boots! */ - if (eventfd_init() < 0) - return -1; - - eventfd_copy2.fd = target_fd; - eventfd_copy2.pid = target_pid; - eventfd_copy2.flags = O_NONBLOCK | O_CLOEXEC; - /* Call the IOCTL to copy the eventfd. */ - ret = ioctl(eventfd_link, EVENTFD_COPY2, &eventfd_copy2); - - if (ret < 0) { - RTE_LOG(ERR, VHOST_CONFIG, - "EVENTFD_COPY2 ioctl failed\n"); - return -1; - } - - return ret; -} diff --git a/lib/librte_vhost/vhost_cuse/eventfd_copy.h b/lib/librte_vhost/vhost_cuse/eventfd_copy.h deleted file mode 100644 index 5f446ca0..00000000 --- a/lib/librte_vhost/vhost_cuse/eventfd_copy.h +++ /dev/null @@ -1,45 +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. - */ -#ifndef _EVENTFD_H -#define _EVENTFD_H - -int -eventfd_init(void); - -int -eventfd_free(void); - -int -eventfd_copy(int target_fd, int target_pid); - -#endif diff --git a/lib/librte_vhost/vhost_cuse/vhost-net-cdev.c b/lib/librte_vhost/vhost_cuse/vhost-net-cdev.c deleted file mode 100644 index 5d150116..00000000 --- a/lib/librte_vhost/vhost_cuse/vhost-net-cdev.c +++ /dev/null @@ -1,431 +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 <errno.h> -#include <fuse/cuse_lowlevel.h> -#include <linux/limits.h> -#include <linux/vhost.h> -#include <stdint.h> -#include <string.h> -#include <unistd.h> - -#include <rte_ethdev.h> -#include <rte_log.h> -#include <rte_string_fns.h> -#include <rte_virtio_net.h> - -#include "virtio-net-cdev.h" -#include "vhost-net.h" -#include "eventfd_copy.h" - -#define FUSE_OPT_DUMMY "\0\0" -#define FUSE_OPT_FORE "-f\0\0" -#define FUSE_OPT_NOMULTI "-s\0\0" - -static const uint32_t default_major = 231; -static const uint32_t default_minor = 1; -static const char cuse_device_name[] = "/dev/cuse"; -static const char default_cdev[] = "vhost-net"; - -static struct fuse_session *session; - -/* - * Returns vhost_cuse_device_ctx from given fuse_req_t. The - * index is populated later when the device is added to the - * device linked list. - */ -static struct vhost_cuse_device_ctx -fuse_req_to_vhost_ctx(fuse_req_t req, struct fuse_file_info *fi) -{ - struct vhost_cuse_device_ctx ctx; - struct fuse_ctx const *const req_ctx = fuse_req_ctx(req); - - ctx.pid = req_ctx->pid; - ctx.vid = (int)fi->fh; - - return ctx; -} - -/* - * When the device is created in QEMU it gets initialised here and - * added to the device linked list. - */ -static void -vhost_net_open(fuse_req_t req, struct fuse_file_info *fi) -{ - int vid = 0; - - vid = vhost_new_device(); - if (vid == -1) { - fuse_reply_err(req, EPERM); - return; - } - - fi->fh = vid; - - RTE_LOG(INFO, VHOST_CONFIG, - "(%d) device configuration started\n", vid); - fuse_reply_open(req, fi); -} - -/* - * When QEMU is shutdown or killed the device gets released. - */ -static void -vhost_net_release(fuse_req_t req, struct fuse_file_info *fi) -{ - int err = 0; - struct vhost_cuse_device_ctx ctx = fuse_req_to_vhost_ctx(req, fi); - - vhost_destroy_device(ctx.vid); - RTE_LOG(INFO, VHOST_CONFIG, "(%d) device released\n", ctx.vid); - fuse_reply_err(req, err); -} - -/* - * Boilerplate code for CUSE IOCTL - * Implicit arguments: vid, req, result. - */ -#define VHOST_IOCTL(func) do { \ - result = (func)(vid); \ - fuse_reply_ioctl(req, result, NULL, 0); \ -} while (0) - -/* - * Boilerplate IOCTL RETRY - * Implicit arguments: req. - */ -#define VHOST_IOCTL_RETRY(size_r, size_w) do { \ - struct iovec iov_r = { arg, (size_r) }; \ - struct iovec iov_w = { arg, (size_w) }; \ - fuse_reply_ioctl_retry(req, &iov_r, \ - (size_r) ? 1 : 0, &iov_w, (size_w) ? 1 : 0);\ -} while (0) - -/* - * Boilerplate code for CUSE Read IOCTL - * Implicit arguments: vid, req, result, in_bufsz, in_buf. - */ -#define VHOST_IOCTL_R(type, var, func) do { \ - if (!in_bufsz) { \ - VHOST_IOCTL_RETRY(sizeof(type), 0);\ - } else { \ - (var) = *(const type*)in_buf; \ - result = func(vid, &(var)); \ - fuse_reply_ioctl(req, result, NULL, 0);\ - } \ -} while (0) - -/* - * Boilerplate code for CUSE Write IOCTL - * Implicit arguments: vid, req, result, out_bufsz. - */ -#define VHOST_IOCTL_W(type, var, func) do { \ - if (!out_bufsz) { \ - VHOST_IOCTL_RETRY(0, sizeof(type));\ - } else { \ - result = (func)(vid, &(var));\ - fuse_reply_ioctl(req, result, &(var), sizeof(type));\ - } \ -} while (0) - -/* - * Boilerplate code for CUSE Read/Write IOCTL - * Implicit arguments: vid, req, result, in_bufsz, in_buf. - */ -#define VHOST_IOCTL_RW(type1, var1, type2, var2, func) do { \ - if (!in_bufsz) { \ - VHOST_IOCTL_RETRY(sizeof(type1), sizeof(type2));\ - } else { \ - (var1) = *(const type1*) (in_buf); \ - result = (func)(vid, (var1), &(var2)); \ - fuse_reply_ioctl(req, result, &(var2), sizeof(type2));\ - } \ -} while (0) - -/* - * The IOCTLs are handled using CUSE/FUSE in userspace. Depending on the type - * of IOCTL a buffer is requested to read or to write. This request is handled - * by FUSE and the buffer is then given to CUSE. - */ -static void -vhost_net_ioctl(fuse_req_t req, int cmd, void *arg, - struct fuse_file_info *fi, __rte_unused unsigned flags, - const void *in_buf, size_t in_bufsz, size_t out_bufsz) -{ - struct vhost_cuse_device_ctx ctx = fuse_req_to_vhost_ctx(req, fi); - struct vhost_vring_file file; - struct vhost_vring_state state; - struct vhost_vring_addr addr; - uint64_t features; - uint32_t index; - int result = 0; - int vid = ctx.vid; - - switch (cmd) { - case VHOST_NET_SET_BACKEND: - LOG_DEBUG(VHOST_CONFIG, - "(%d) IOCTL: VHOST_NET_SET_BACKEND\n", ctx.vid); - if (!in_buf) { - VHOST_IOCTL_RETRY(sizeof(file), 0); - break; - } - file = *(const struct vhost_vring_file *)in_buf; - result = cuse_set_backend(ctx, &file); - fuse_reply_ioctl(req, result, NULL, 0); - break; - - case VHOST_GET_FEATURES: - LOG_DEBUG(VHOST_CONFIG, - "(%d) IOCTL: VHOST_GET_FEATURES\n", vid); - VHOST_IOCTL_W(uint64_t, features, vhost_get_features); - break; - - case VHOST_SET_FEATURES: - LOG_DEBUG(VHOST_CONFIG, - "(%d) IOCTL: VHOST_SET_FEATURES\n", vid); - VHOST_IOCTL_R(uint64_t, features, vhost_set_features); - break; - - case VHOST_RESET_OWNER: - LOG_DEBUG(VHOST_CONFIG, - "(%d) IOCTL: VHOST_RESET_OWNER\n", vid); - VHOST_IOCTL(vhost_reset_owner); - break; - - case VHOST_SET_OWNER: - LOG_DEBUG(VHOST_CONFIG, - "(%d) IOCTL: VHOST_SET_OWNER\n", vid); - VHOST_IOCTL(vhost_set_owner); - break; - - case VHOST_SET_MEM_TABLE: - /*TODO fix race condition.*/ - LOG_DEBUG(VHOST_CONFIG, - "(%d) IOCTL: VHOST_SET_MEM_TABLE\n", vid); - static struct vhost_memory mem_temp; - - switch (in_bufsz) { - case 0: - VHOST_IOCTL_RETRY(sizeof(struct vhost_memory), 0); - break; - - case sizeof(struct vhost_memory): - mem_temp = *(const struct vhost_memory *) in_buf; - - if (mem_temp.nregions > 0) { - VHOST_IOCTL_RETRY(sizeof(struct vhost_memory) + - (sizeof(struct vhost_memory_region) * - mem_temp.nregions), 0); - } else { - result = -1; - fuse_reply_ioctl(req, result, NULL, 0); - } - break; - - default: - result = cuse_set_mem_table(ctx, in_buf, - mem_temp.nregions); - if (result) - fuse_reply_err(req, EINVAL); - else - fuse_reply_ioctl(req, result, NULL, 0); - } - break; - - case VHOST_SET_VRING_NUM: - LOG_DEBUG(VHOST_CONFIG, - "(%d) IOCTL: VHOST_SET_VRING_NUM\n", vid); - VHOST_IOCTL_R(struct vhost_vring_state, state, - vhost_set_vring_num); - break; - - case VHOST_SET_VRING_BASE: - LOG_DEBUG(VHOST_CONFIG, - "(%d) IOCTL: VHOST_SET_VRING_BASE\n", vid); - VHOST_IOCTL_R(struct vhost_vring_state, state, - vhost_set_vring_base); - break; - - case VHOST_GET_VRING_BASE: - LOG_DEBUG(VHOST_CONFIG, - "(%d) IOCTL: VHOST_GET_VRING_BASE\n", vid); - VHOST_IOCTL_RW(uint32_t, index, - struct vhost_vring_state, state, vhost_get_vring_base); - break; - - case VHOST_SET_VRING_ADDR: - LOG_DEBUG(VHOST_CONFIG, - "(%d) IOCTL: VHOST_SET_VRING_ADDR\n", vid); - VHOST_IOCTL_R(struct vhost_vring_addr, addr, - vhost_set_vring_addr); - break; - - case VHOST_SET_VRING_KICK: - case VHOST_SET_VRING_CALL: - if (cmd == VHOST_SET_VRING_KICK) - LOG_DEBUG(VHOST_CONFIG, - "(%d) IOCTL: VHOST_SET_VRING_KICK\n", vid); - else - LOG_DEBUG(VHOST_CONFIG, - "(%d) IOCTL: VHOST_SET_VRING_CALL\n", vid); - if (!in_buf) - VHOST_IOCTL_RETRY(sizeof(struct vhost_vring_file), 0); - else { - int fd; - file = *(const struct vhost_vring_file *)in_buf; - LOG_DEBUG(VHOST_CONFIG, - "idx:%d fd:%d\n", file.index, file.fd); - fd = eventfd_copy(file.fd, ctx.pid); - if (fd < 0) { - fuse_reply_ioctl(req, -1, NULL, 0); - result = -1; - break; - } - file.fd = fd; - if (cmd == VHOST_SET_VRING_KICK) { - result = vhost_set_vring_kick(vid, &file); - fuse_reply_ioctl(req, result, NULL, 0); - } else { - result = vhost_set_vring_call(vid, &file); - fuse_reply_ioctl(req, result, NULL, 0); - } - } - break; - - default: - RTE_LOG(ERR, VHOST_CONFIG, - "(%d) IOCTL: DOESN NOT EXIST\n", vid); - result = -1; - fuse_reply_ioctl(req, result, NULL, 0); - } - - if (result < 0) - LOG_DEBUG(VHOST_CONFIG, - "(%d) IOCTL: FAIL\n", vid); - else - LOG_DEBUG(VHOST_CONFIG, - "(%d) IOCTL: SUCCESS\n", vid); -} - -/* - * Structure handling open, release and ioctl function pointers is populated. - */ -static const struct cuse_lowlevel_ops vhost_net_ops = { - .open = vhost_net_open, - .release = vhost_net_release, - .ioctl = vhost_net_ioctl, -}; - -/* - * cuse_info is populated and used to register the cuse device. - * vhost_net_device_ops are also passed when the device is registered in app. - */ -int -rte_vhost_driver_register(const char *dev_name, uint64_t flags) -{ - struct cuse_info cuse_info; - char device_name[PATH_MAX] = ""; - char char_device_name[PATH_MAX] = ""; - const char *device_argv[] = { device_name }; - - char fuse_opt_dummy[] = FUSE_OPT_DUMMY; - char fuse_opt_fore[] = FUSE_OPT_FORE; - char fuse_opt_nomulti[] = FUSE_OPT_NOMULTI; - char *fuse_argv[] = {fuse_opt_dummy, fuse_opt_fore, fuse_opt_nomulti}; - - if (flags) { - RTE_LOG(ERR, VHOST_CONFIG, - "vhost-cuse does not support any flags so far\n"); - return -1; - } - - if (access(cuse_device_name, R_OK | W_OK) < 0) { - RTE_LOG(ERR, VHOST_CONFIG, - "char device %s can't be accessed, maybe not exist\n", - cuse_device_name); - return -1; - } - - if (eventfd_init() < 0) - return -1; - - /* - * The device name is created. This is passed to QEMU so that it can - * register the device with our application. - */ - snprintf(device_name, PATH_MAX, "DEVNAME=%s", dev_name); - snprintf(char_device_name, PATH_MAX, "/dev/%s", dev_name); - - /* Check if device already exists. */ - if (access(char_device_name, F_OK) != -1) { - RTE_LOG(ERR, VHOST_CONFIG, - "char device %s already exists\n", char_device_name); - return -1; - } - - memset(&cuse_info, 0, sizeof(cuse_info)); - cuse_info.dev_major = default_major; - cuse_info.dev_minor = default_minor; - cuse_info.dev_info_argc = 1; - cuse_info.dev_info_argv = device_argv; - cuse_info.flags = CUSE_UNRESTRICTED_IOCTL; - - session = cuse_lowlevel_setup(3, fuse_argv, - &cuse_info, &vhost_net_ops, 0, NULL); - if (session == NULL) - return -1; - - return 0; -} - -/** - * An empty function for unregister - */ -int -rte_vhost_driver_unregister(const char *dev_name __rte_unused) -{ - return 0; -} - -/** - * The CUSE session is launched allowing the application to receive open, - * release and ioctl calls. - */ -int -rte_vhost_driver_session_start(void) -{ - fuse_session_loop(session); - - return 0; -} diff --git a/lib/librte_vhost/vhost_cuse/virtio-net-cdev.c b/lib/librte_vhost/vhost_cuse/virtio-net-cdev.c deleted file mode 100644 index 552be7d4..00000000 --- a/lib/librte_vhost/vhost_cuse/virtio-net-cdev.c +++ /dev/null @@ -1,433 +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 <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; - } -} diff --git a/lib/librte_vhost/vhost_cuse/virtio-net-cdev.h b/lib/librte_vhost/vhost_cuse/virtio-net-cdev.h deleted file mode 100644 index 3f67154b..00000000 --- a/lib/librte_vhost/vhost_cuse/virtio-net-cdev.h +++ /dev/null @@ -1,56 +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. - */ -#ifndef _VIRTIO_NET_CDEV_H -#define _VIRTIO_NET_CDEV_H - -#include <stdint.h> -#include <linux/vhost.h> - -#include "vhost-net.h" - -/* - * Structure used to identify device context. - */ -struct vhost_cuse_device_ctx { - pid_t pid; /* PID of process calling the IOCTL. */ - int vid; /* Virtio-net device ID */ -}; - -int -cuse_set_mem_table(struct vhost_cuse_device_ctx ctx, - const struct vhost_memory *mem_regions_addr, uint32_t nregions); - -int -cuse_set_backend(struct vhost_cuse_device_ctx ctx, struct vhost_vring_file *); - -#endif |