From 6b3e017e5d25f15da73f7700f7f2ac553ef1a2e9 Mon Sep 17 00:00:00 2001 From: Christian Ehrhardt Date: Thu, 8 Dec 2016 14:07:29 +0100 Subject: Imported Upstream version 16.11 Change-Id: I1944c65ddc88a9ad70f8c0eb6731552b84fbcb77 Signed-off-by: Christian Ehrhardt --- lib/librte_vhost/vhost_cuse/vhost-net-cdev.c | 431 --------------------------- 1 file changed, 431 deletions(-) delete mode 100644 lib/librte_vhost/vhost_cuse/vhost-net-cdev.c (limited to 'lib/librte_vhost/vhost_cuse/vhost-net-cdev.c') 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 -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include - -#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; -} -- cgit 1.2.3-korg