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authorSteven Luong <sluong@cisco.com>2022-10-19 12:46:29 -0700
committerDamjan Marion <dmarion@0xa5.net>2022-12-02 13:43:11 +0000
commit7eba44d1ec54982636f830a4859027218ca56832 (patch)
tree6447cda45a430c8a735b92be2b13b41b18e1f8a1 /src/vnet
parenta6d16b71308f1badf4b362d26d2326a2977fe462 (diff)
vhost: convert vhost device driver to a plugin
convert vhost device driver to a plugin as described in https://jira.fd.io/browse/VPP-2065 Type: improvement Signed-off-by: Steven Luong <sluong@cisco.com> Change-Id: Ibfe2f351bcaed36a04b136d082ae414145dd37b5
Diffstat (limited to 'src/vnet')
-rw-r--r--src/vnet/CMakeLists.txt8
-rw-r--r--src/vnet/devices/virtio/vhost_user.api201
-rw-r--r--src/vnet/devices/virtio/vhost_user.c2613
-rw-r--r--src/vnet/devices/virtio/vhost_user.h388
-rw-r--r--src/vnet/devices/virtio/vhost_user_api.c352
-rw-r--r--src/vnet/devices/virtio/vhost_user_inline.h496
-rw-r--r--src/vnet/devices/virtio/vhost_user_input.c1474
-rw-r--r--src/vnet/devices/virtio/vhost_user_output.c1145
8 files changed, 0 insertions, 6677 deletions
diff --git a/src/vnet/CMakeLists.txt b/src/vnet/CMakeLists.txt
index fd62217dbf9..7006bd50e67 100644
--- a/src/vnet/CMakeLists.txt
+++ b/src/vnet/CMakeLists.txt
@@ -986,10 +986,6 @@ list(APPEND VNET_SOURCES
devices/virtio/format.c
devices/virtio/node.c
devices/virtio/pci.c
- devices/virtio/vhost_user.c
- devices/virtio/vhost_user_input.c
- devices/virtio/vhost_user_output.c
- devices/virtio/vhost_user_api.c
devices/virtio/virtio.c
devices/virtio/virtio_api.c
devices/virtio/virtio_pci_legacy.c
@@ -1006,20 +1002,16 @@ list(APPEND VNET_HEADERS
devices/virtio/virtio_pci_legacy.h
devices/virtio/virtio_pci_modern.h
devices/virtio/vhost_std.h
- devices/virtio/vhost_user.h
devices/virtio/virtio_types_api.h
)
list(APPEND VNET_MULTIARCH_SOURCES
- devices/virtio/vhost_user_input.c
- devices/virtio/vhost_user_output.c
devices/virtio/node.c
devices/af_packet/node.c
devices/virtio/device.c
)
list(APPEND VNET_API_FILES
- devices/virtio/vhost_user.api
devices/virtio/virtio.api
devices/virtio/virtio_types.api
)
diff --git a/src/vnet/devices/virtio/vhost_user.api b/src/vnet/devices/virtio/vhost_user.api
deleted file mode 100644
index b026ba768a9..00000000000
--- a/src/vnet/devices/virtio/vhost_user.api
+++ /dev/null
@@ -1,201 +0,0 @@
-/*
- * Copyright (c) 2015-2016 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-option version = "4.1.1";
-
-import "vnet/interface_types.api";
-import "vnet/ethernet/ethernet_types.api";
-import "vnet/devices/virtio/virtio_types.api";
-
-/** \brief vhost-user interface create request
- @param client_index - opaque cookie to identify the sender
- @param is_server - our side is socket server
- @param sock_filename - unix socket filename, used to speak with frontend
- @param use_custom_mac - enable or disable the use of the provided hardware address
- @param disable_mrg_rxbuf - disable the use of merge receive buffers
- @param disable_indirect_desc - disable the use of indirect descriptors which driver can use
- @param enable_gso - enable gso support (default 0)
- @param enable_packed - enable packed ring support (default 0)
- @param mac_address - hardware address to use if 'use_custom_mac' is set
-*/
-define create_vhost_user_if
-{
- option deprecated;
- u32 client_index;
- u32 context;
- bool is_server;
- string sock_filename[256];
- bool renumber;
- bool disable_mrg_rxbuf;
- bool disable_indirect_desc;
- bool enable_gso;
- bool enable_packed;
- u32 custom_dev_instance;
- bool use_custom_mac;
- vl_api_mac_address_t mac_address;
- string tag[64];
-};
-
-/** \brief vhost-user interface create response
- @param context - sender context, to match reply w/ request
- @param retval - return code for the request
- @param sw_if_index - interface the operation is applied to
-*/
-define create_vhost_user_if_reply
-{
- option deprecated;
- u32 context;
- i32 retval;
- vl_api_interface_index_t sw_if_index;
-};
-
-/** \brief vhost-user interface modify request
- @param client_index - opaque cookie to identify the sender
- @param is_server - our side is socket server
- @param sock_filename - unix socket filename, used to speak with frontend
- @param enable_gso - enable gso support (default 0)
- @param enable_packed - enable packed ring support (default 0)
-*/
-autoreply define modify_vhost_user_if
-{
- option deprecated;
- u32 client_index;
- u32 context;
- vl_api_interface_index_t sw_if_index;
- bool is_server;
- string sock_filename[256];
- bool renumber;
- bool enable_gso;
- bool enable_packed;
- u32 custom_dev_instance;
-};
-
-/** \brief vhost-user interface create request
- @param client_index - opaque cookie to identify the sender
- @param is_server - our side is socket server
- @param sock_filename - unix socket filename, used to speak with frontend
- @param use_custom_mac - enable or disable the use of the provided hardware address
- @param disable_mrg_rxbuf - disable the use of merge receive buffers
- @param disable_indirect_desc - disable the use of indirect descriptors which driver can use
- @param enable_gso - enable gso support (default 0)
- @param enable_packed - enable packed ring support (default 0)
- @param enable_event_idx - enable event_idx support (default 0)
- @param mac_address - hardware address to use if 'use_custom_mac' is set
- @param renumber - if true, use custom_dev_instance is valid
- @param custom_dev_instance - custom device instance number
-*/
-define create_vhost_user_if_v2
-{
- u32 client_index;
- u32 context;
- bool is_server;
- string sock_filename[256];
- bool renumber;
- bool disable_mrg_rxbuf;
- bool disable_indirect_desc;
- bool enable_gso;
- bool enable_packed;
- bool enable_event_idx;
- u32 custom_dev_instance;
- bool use_custom_mac;
- vl_api_mac_address_t mac_address;
- string tag[64];
-};
-
-/** \brief vhost-user interface create response
- @param context - sender context, to match reply w/ request
- @param retval - return code for the request
- @param sw_if_index - interface the operation is applied to
-*/
-define create_vhost_user_if_v2_reply
-{
- u32 context;
- i32 retval;
- vl_api_interface_index_t sw_if_index;
-};
-
-/** \brief vhost-user interface modify request
- @param client_index - opaque cookie to identify the sender
- @param is_server - our side is socket server
- @param sock_filename - unix socket filename, used to speak with frontend
- @param enable_gso - enable gso support (default 0)
- @param enable_packed - enable packed ring support (default 0)
- @param enable_event_idx - enable event idx support (default 0)
- @param renumber - if true, use custom_dev_instance is valid
- @param custom_dev_instance - custom device instance number
-*/
-autoreply define modify_vhost_user_if_v2
-{
- u32 client_index;
- u32 context;
- vl_api_interface_index_t sw_if_index;
- bool is_server;
- string sock_filename[256];
- bool renumber;
- bool enable_gso;
- bool enable_packed;
- bool enable_event_idx;
- u32 custom_dev_instance;
-};
-
-/** \brief vhost-user interface delete request
- @param client_index - opaque cookie to identify the sender
-*/
-autoreply define delete_vhost_user_if
-{
- u32 client_index;
- u32 context;
- vl_api_interface_index_t sw_if_index;
-};
-
-/** \brief Vhost-user interface details structure (fix this)
- @param sw_if_index - index of the interface
- @param interface_name - name of interface
- @param virtio_net_hdr_sz - net header size
- @param features_first_32 - interface features, first 32 bits
- @param features_last_32 - interface features, last 32 bits
- @param is_server - vhost-user server socket
- @param sock_filename - socket filename
- @param num_regions - number of used memory regions
- @param sock_errno - socket errno
-*/
-define sw_interface_vhost_user_details
-{
- u32 context;
- vl_api_interface_index_t sw_if_index;
- string interface_name[64];
- u32 virtio_net_hdr_sz;
- vl_api_virtio_net_features_first_32_t features_first_32;
- vl_api_virtio_net_features_last_32_t features_last_32;
- bool is_server;
- string sock_filename[256];
- u32 num_regions;
- i32 sock_errno;
-};
-
-/** \brief Vhost-user interface dump request
- @param sw_if_index - filter by sw_if_index
-*/
-define sw_interface_vhost_user_dump
-{
- u32 client_index;
- u32 context;
- vl_api_interface_index_t sw_if_index [default=0xffffffff];
-};
-/*
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
diff --git a/src/vnet/devices/virtio/vhost_user.c b/src/vnet/devices/virtio/vhost_user.c
deleted file mode 100644
index b6e0806db90..00000000000
--- a/src/vnet/devices/virtio/vhost_user.c
+++ /dev/null
@@ -1,2613 +0,0 @@
-/*
- *------------------------------------------------------------------
- * vhost.c - vhost-user
- *
- * Copyright (c) 2014-2018 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *------------------------------------------------------------------
- */
-
-#include <fcntl.h> /* for open */
-#include <sys/ioctl.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/uio.h> /* for iovec */
-#include <netinet/in.h>
-#include <sys/vfs.h>
-
-#include <linux/if_arp.h>
-#include <linux/if_tun.h>
-
-#include <vlib/vlib.h>
-#include <vlib/unix/unix.h>
-
-#include <vnet/ethernet/ethernet.h>
-#include <vnet/devices/devices.h>
-#include <vnet/feature/feature.h>
-#include <vnet/interface/rx_queue_funcs.h>
-#include <vnet/interface/tx_queue_funcs.h>
-
-#include <vnet/devices/virtio/vhost_user.h>
-#include <vnet/devices/virtio/vhost_user_inline.h>
-
-/**
- * @file
- * @brief vHost User Device Driver.
- *
- * This file contains the source code for vHost User interface.
- */
-
-
-vlib_node_registration_t vhost_user_send_interrupt_node;
-
-/* *INDENT-OFF* */
-vhost_user_main_t vhost_user_main = {
- .mtu_bytes = 1518,
-};
-
-VNET_HW_INTERFACE_CLASS (vhost_interface_class, static) = {
- .name = "vhost-user",
-};
-/* *INDENT-ON* */
-
-static long
-get_huge_page_size (int fd)
-{
- struct statfs s;
- fstatfs (fd, &s);
- return s.f_bsize;
-}
-
-static void
-unmap_all_mem_regions (vhost_user_intf_t * vui)
-{
- int i, r, q;
- vhost_user_vring_t *vq;
-
- for (i = 0; i < vui->nregions; i++)
- {
- if (vui->region_mmap_addr[i] != MAP_FAILED)
- {
-
- long page_sz = get_huge_page_size (vui->region_mmap_fd[i]);
-
- ssize_t map_sz = (vui->regions[i].memory_size +
- vui->regions[i].mmap_offset +
- page_sz - 1) & ~(page_sz - 1);
-
- r =
- munmap (vui->region_mmap_addr[i] - vui->regions[i].mmap_offset,
- map_sz);
-
- vu_log_debug (vui, "unmap memory region %d addr 0x%lx len 0x%lx "
- "page_sz 0x%x", i, vui->region_mmap_addr[i], map_sz,
- page_sz);
-
- vui->region_mmap_addr[i] = MAP_FAILED;
-
- if (r == -1)
- {
- vu_log_err (vui, "failed to unmap memory region (errno %d)",
- errno);
- }
- close (vui->region_mmap_fd[i]);
- }
- }
- vui->nregions = 0;
-
- FOR_ALL_VHOST_RX_TXQ (q, vui)
- {
- vq = &vui->vrings[q];
- vq->avail = 0;
- vq->used = 0;
- vq->desc = 0;
- }
-}
-
-static_always_inline void
-vhost_user_tx_thread_placement (vhost_user_intf_t *vui, u32 qid)
-{
- vnet_main_t *vnm = vnet_get_main ();
- vhost_user_vring_t *rxvq = &vui->vrings[qid];
- u32 q = qid >> 1, rxvq_count;
-
- ASSERT ((qid & 1) == 0);
- if (!rxvq->started || !rxvq->enabled)
- return;
-
- rxvq_count = (qid >> 1) + 1;
- if (rxvq->queue_index == ~0)
- {
- rxvq->queue_index =
- vnet_hw_if_register_tx_queue (vnm, vui->hw_if_index, q);
- rxvq->qid = q;
- }
-
- FOR_ALL_VHOST_RXQ (q, vui)
- {
- vhost_user_vring_t *rxvq = &vui->vrings[q];
- u32 qi = rxvq->queue_index;
-
- if (rxvq->queue_index == ~0)
- break;
- for (u32 i = 0; i < vlib_get_n_threads (); i++)
- vnet_hw_if_tx_queue_unassign_thread (vnm, qi, i);
- }
-
- for (u32 i = 0; i < vlib_get_n_threads (); i++)
- {
- vhost_user_vring_t *rxvq =
- &vui->vrings[VHOST_VRING_IDX_RX (i % rxvq_count)];
- u32 qi = rxvq->queue_index;
-
- vnet_hw_if_tx_queue_assign_thread (vnm, qi, i);
- }
-
- vnet_hw_if_update_runtime_data (vnm, vui->hw_if_index);
-}
-
-/**
- * @brief Unassign existing interface/queue to thread mappings and re-assign
- * new interface/queue to thread mappings
- */
-static_always_inline void
-vhost_user_rx_thread_placement (vhost_user_intf_t * vui, u32 qid)
-{
- vhost_user_vring_t *txvq = &vui->vrings[qid];
- vnet_main_t *vnm = vnet_get_main ();
- int rv;
- u32 q = qid >> 1;
- vhost_user_main_t *vum = &vhost_user_main;
-
- ASSERT ((qid & 1) == 1); // should be odd
- // Assign new queue mappings for the interface
- if (txvq->queue_index != ~0)
- return;
- vnet_hw_if_set_input_node (vnm, vui->hw_if_index,
- vhost_user_input_node.index);
- txvq->queue_index = vnet_hw_if_register_rx_queue (vnm, vui->hw_if_index, q,
- VNET_HW_IF_RXQ_THREAD_ANY);
- txvq->thread_index =
- vnet_hw_if_get_rx_queue_thread_index (vnm, txvq->queue_index);
-
- if (txvq->mode == VNET_HW_IF_RX_MODE_UNKNOWN)
- /* Set polling as the default */
- txvq->mode = VNET_HW_IF_RX_MODE_POLLING;
- if (txvq->mode == VNET_HW_IF_RX_MODE_POLLING)
- {
- vhost_cpu_t *cpu = vec_elt_at_index (vum->cpus, txvq->thread_index);
- /* Keep a polling queue count for each thread */
- cpu->polling_q_count++;
- }
- txvq->qid = q;
- rv = vnet_hw_if_set_rx_queue_mode (vnm, txvq->queue_index, txvq->mode);
- if (rv)
- vu_log_warn (vui, "unable to set rx mode for interface %d, "
- "queue %d: rc=%d", vui->hw_if_index, q, rv);
- vnet_hw_if_update_runtime_data (vnm, vui->hw_if_index);
-}
-
-/** @brief Returns whether at least one TX and one RX vring are enabled */
-static_always_inline int
-vhost_user_intf_ready (vhost_user_intf_t * vui)
-{
- int i, found[2] = { }; //RX + TX
-
- for (i = 0; i < vui->num_qid; i++)
- if (vui->vrings[i].started && vui->vrings[i].enabled)
- found[i & 1] = 1;
-
- return found[0] && found[1];
-}
-
-static_always_inline void
-vhost_user_update_iface_state (vhost_user_intf_t * vui)
-{
- /* if we have pointers to descriptor table, go up */
- int is_ready = vhost_user_intf_ready (vui);
- if (is_ready != vui->is_ready)
- {
- vu_log_debug (vui, "interface %d %s", vui->sw_if_index,
- is_ready ? "ready" : "down");
- if (vui->admin_up)
- vnet_hw_interface_set_flags (vnet_get_main (), vui->hw_if_index,
- is_ready ? VNET_HW_INTERFACE_FLAG_LINK_UP
- : 0);
- vui->is_ready = is_ready;
- }
-}
-
-static clib_error_t *
-vhost_user_callfd_read_ready (clib_file_t * uf)
-{
- __attribute__ ((unused)) int n;
- u8 buff[8];
-
- n = read (uf->file_descriptor, ((char *) &buff), 8);
-
- return 0;
-}
-
-static_always_inline void
-vhost_user_thread_placement (vhost_user_intf_t * vui, u32 qid)
-{
- if (qid & 1) // RX is odd, TX is even
- {
- if (vui->vrings[qid].queue_index == ~0)
- vhost_user_rx_thread_placement (vui, qid);
- }
- else
- vhost_user_tx_thread_placement (vui, qid);
-}
-
-static clib_error_t *
-vhost_user_kickfd_read_ready (clib_file_t * uf)
-{
- __attribute__ ((unused)) ssize_t n;
- u8 buff[8];
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui =
- pool_elt_at_index (vum->vhost_user_interfaces, uf->private_data >> 8);
- u32 qid = uf->private_data & 0xff;
- u32 is_txq = qid & 1;
- vhost_user_vring_t *vq = &vui->vrings[qid];
- vnet_main_t *vnm = vnet_get_main ();
-
- n = read (uf->file_descriptor, buff, 8);
- if (vq->started == 0)
- {
- vq->started = 1;
- vhost_user_thread_placement (vui, qid);
- vhost_user_update_iface_state (vui);
- if (is_txq)
- vnet_hw_if_set_rx_queue_file_index (vnm, vq->queue_index,
- vq->kickfd_idx);
- }
-
- if (is_txq && (vq->mode != VNET_HW_IF_RX_MODE_POLLING) &&
- vhost_user_intf_ready (vui))
- {
- vhost_cpu_t *cpu = vec_elt_at_index (vum->cpus, vq->thread_index);
- /*
- * If the thread has more than 1 queue and the other queue is in polling
- * mode, there is no need to trigger an interrupt
- */
- if (cpu->polling_q_count == 0)
- vnet_hw_if_rx_queue_set_int_pending (vnm, vq->queue_index);
- }
-
- return 0;
-}
-
-static_always_inline void
-vhost_user_vring_init (vhost_user_intf_t * vui, u32 qid)
-{
- vhost_user_vring_t *vring = &vui->vrings[qid];
-
- clib_memset (vring, 0, sizeof (*vring));
- vring->kickfd_idx = ~0;
- vring->callfd_idx = ~0;
- vring->errfd = -1;
- vring->qid = -1;
- vring->queue_index = ~0;
- vring->thread_index = ~0;
- vring->mode = VNET_HW_IF_RX_MODE_POLLING;
-
- clib_spinlock_init (&vring->vring_lock);
-
- /*
- * We have a bug with some qemu 2.5, and this may be a fix.
- * Feel like interpretation holy text, but this is from vhost-user.txt.
- * "
- * One queue pair is enabled initially. More queues are enabled
- * dynamically, by sending message VHOST_USER_SET_VRING_ENABLE.
- * "
- * Don't know who's right, but this is what DPDK does.
- */
- if (qid == 0 || qid == 1)
- vring->enabled = 1;
-}
-
-static_always_inline void
-vhost_user_vring_close (vhost_user_intf_t * vui, u32 qid)
-{
- vhost_user_vring_t *vring = &vui->vrings[qid];
-
- if (vring->kickfd_idx != ~0)
- {
- clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
- vring->kickfd_idx);
- clib_file_del (&file_main, uf);
- vring->kickfd_idx = ~0;
- }
- if (vring->callfd_idx != ~0)
- {
- clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
- vring->callfd_idx);
- clib_file_del (&file_main, uf);
- vring->callfd_idx = ~0;
- }
- if (vring->errfd != -1)
- {
- close (vring->errfd);
- vring->errfd = -1;
- }
-
- clib_spinlock_free (&vring->vring_lock);
-
- // save the needed information in vrings prior to being wiped out
- u16 q = vui->vrings[qid].qid;
- u32 queue_index = vui->vrings[qid].queue_index;
- u32 mode = vui->vrings[qid].mode;
- u32 thread_index = vui->vrings[qid].thread_index;
- vhost_user_vring_init (vui, qid);
- vui->vrings[qid].qid = q;
- vui->vrings[qid].queue_index = queue_index;
- vui->vrings[qid].mode = mode;
- vui->vrings[qid].thread_index = thread_index;
-}
-
-static_always_inline void
-vhost_user_if_disconnect (vhost_user_intf_t * vui)
-{
- vnet_main_t *vnm = vnet_get_main ();
- int q;
-
- vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
-
- if (vui->clib_file_index != ~0)
- {
- clib_file_del (&file_main, file_main.file_pool + vui->clib_file_index);
- vui->clib_file_index = ~0;
- }
-
- vui->is_ready = 0;
-
- FOR_ALL_VHOST_RX_TXQ (q, vui) { vhost_user_vring_close (vui, q); }
-
- unmap_all_mem_regions (vui);
- vu_log_debug (vui, "interface ifindex %d disconnected", vui->sw_if_index);
-}
-
-void
-vhost_user_set_operation_mode (vhost_user_intf_t *vui,
- vhost_user_vring_t *txvq)
-{
- if (vhost_user_is_packed_ring_supported (vui))
- {
- if (txvq->used_event)
- {
- if (txvq->mode == VNET_HW_IF_RX_MODE_POLLING)
- txvq->used_event->flags = VRING_EVENT_F_DISABLE;
- else
- txvq->used_event->flags = 0;
- }
- }
- else
- {
- if (txvq->used)
- {
- if (txvq->mode == VNET_HW_IF_RX_MODE_POLLING)
- txvq->used->flags = VRING_USED_F_NO_NOTIFY;
- else
- txvq->used->flags = 0;
- }
- }
-}
-
-static clib_error_t *
-vhost_user_socket_read (clib_file_t * uf)
-{
- int n, i, j;
- int fd, number_of_fds = 0;
- int fds[VHOST_MEMORY_MAX_NREGIONS];
- vhost_user_msg_t msg;
- struct msghdr mh;
- struct iovec iov[1];
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui;
- struct cmsghdr *cmsg;
- u8 q;
- clib_file_t template = { 0 };
- vnet_main_t *vnm = vnet_get_main ();
- vlib_main_t *vm = vlib_get_main ();
-
- vui = pool_elt_at_index (vum->vhost_user_interfaces, uf->private_data);
-
- char control[CMSG_SPACE (VHOST_MEMORY_MAX_NREGIONS * sizeof (int))];
-
- clib_memset (&mh, 0, sizeof (mh));
- clib_memset (control, 0, sizeof (control));
-
- for (i = 0; i < VHOST_MEMORY_MAX_NREGIONS; i++)
- fds[i] = -1;
-
- /* set the payload */
- iov[0].iov_base = (void *) &msg;
- iov[0].iov_len = VHOST_USER_MSG_HDR_SZ;
-
- mh.msg_iov = iov;
- mh.msg_iovlen = 1;
- mh.msg_control = control;
- mh.msg_controllen = sizeof (control);
-
- n = recvmsg (uf->file_descriptor, &mh, 0);
-
- if (n != VHOST_USER_MSG_HDR_SZ)
- {
- if (n == -1)
- {
- vu_log_debug (vui, "recvmsg returned error %d %s", errno,
- strerror (errno));
- }
- else
- {
- vu_log_debug (vui, "n (%d) != VHOST_USER_MSG_HDR_SZ (%d)",
- n, VHOST_USER_MSG_HDR_SZ);
- }
- goto close_socket;
- }
-
- if (mh.msg_flags & MSG_CTRUNC)
- {
- vu_log_debug (vui, "MSG_CTRUNC is set");
- goto close_socket;
- }
-
- cmsg = CMSG_FIRSTHDR (&mh);
-
- if (cmsg && (cmsg->cmsg_len > 0) && (cmsg->cmsg_level == SOL_SOCKET) &&
- (cmsg->cmsg_type == SCM_RIGHTS) &&
- (cmsg->cmsg_len - CMSG_LEN (0) <=
- VHOST_MEMORY_MAX_NREGIONS * sizeof (int)))
- {
- number_of_fds = (cmsg->cmsg_len - CMSG_LEN (0)) / sizeof (int);
- clib_memcpy_fast (fds, CMSG_DATA (cmsg), number_of_fds * sizeof (int));
- }
-
- /* version 1, no reply bit set */
- if ((msg.flags & 7) != 1)
- {
- vu_log_debug (vui, "malformed message received. closing socket");
- goto close_socket;
- }
-
- {
- int rv;
- rv =
- read (uf->file_descriptor, ((char *) &msg) + VHOST_USER_MSG_HDR_SZ,
- msg.size);
- if (rv < 0)
- {
- vu_log_debug (vui, "read failed %s", strerror (errno));
- goto close_socket;
- }
- else if (rv != msg.size)
- {
- vu_log_debug (vui, "message too short (read %dB should be %dB)", rv,
- msg.size);
- goto close_socket;
- }
- }
-
- switch (msg.request)
- {
- case VHOST_USER_GET_FEATURES:
- msg.flags |= 4;
- msg.u64 = VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF) |
- VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ) |
- VIRTIO_FEATURE (VIRTIO_F_ANY_LAYOUT) |
- VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC) |
- VIRTIO_FEATURE (VHOST_F_LOG_ALL) |
- VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_ANNOUNCE) |
- VIRTIO_FEATURE (VIRTIO_NET_F_MQ) |
- VIRTIO_FEATURE (VHOST_USER_F_PROTOCOL_FEATURES) |
- VIRTIO_FEATURE (VIRTIO_F_VERSION_1);
- msg.u64 &= vui->feature_mask;
-
- if (vui->enable_event_idx)
- msg.u64 |= VIRTIO_FEATURE (VIRTIO_RING_F_EVENT_IDX);
- if (vui->enable_gso)
- msg.u64 |= FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS;
- if (vui->enable_packed)
- msg.u64 |= VIRTIO_FEATURE (VIRTIO_F_RING_PACKED);
-
- msg.size = sizeof (msg.u64);
- vu_log_debug (vui, "if %d msg VHOST_USER_GET_FEATURES - reply "
- "0x%016llx", vui->hw_if_index, msg.u64);
- n =
- send (uf->file_descriptor, &msg, VHOST_USER_MSG_HDR_SZ + msg.size, 0);
- if (n != (msg.size + VHOST_USER_MSG_HDR_SZ))
- {
- vu_log_debug (vui, "could not send message response");
- goto close_socket;
- }
- break;
-
- case VHOST_USER_SET_FEATURES:
- vu_log_debug (vui, "if %d msg VHOST_USER_SET_FEATURES features "
- "0x%016llx", vui->hw_if_index, msg.u64);
-
- vui->features = msg.u64;
-
- if (vui->features &
- (VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF) |
- VIRTIO_FEATURE (VIRTIO_F_VERSION_1)))
- vui->virtio_net_hdr_sz = 12;
- else
- vui->virtio_net_hdr_sz = 10;
-
- vui->is_any_layout =
- (vui->features & VIRTIO_FEATURE (VIRTIO_F_ANY_LAYOUT)) ? 1 : 0;
-
- ASSERT (vui->virtio_net_hdr_sz < VLIB_BUFFER_PRE_DATA_SIZE);
- if (vui->enable_gso &&
- ((vui->features & FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS)
- == FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS))
- {
- vnet_hw_if_set_caps (vnm, vui->hw_if_index,
- VNET_HW_IF_CAP_TCP_GSO |
- VNET_HW_IF_CAP_TX_TCP_CKSUM |
- VNET_HW_IF_CAP_TX_UDP_CKSUM);
- }
- else
- {
- vnet_hw_if_unset_caps (vnm, vui->hw_if_index,
- VNET_HW_IF_CAP_TCP_GSO |
- VNET_HW_IF_CAP_L4_TX_CKSUM);
- }
- vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
- vui->is_ready = 0;
- vhost_user_update_iface_state (vui);
- break;
-
- case VHOST_USER_SET_MEM_TABLE:
- vu_log_debug (vui, "if %d msg VHOST_USER_SET_MEM_TABLE nregions %d",
- vui->hw_if_index, msg.memory.nregions);
-
- if ((msg.memory.nregions < 1) ||
- (msg.memory.nregions > VHOST_MEMORY_MAX_NREGIONS))
- {
- vu_log_debug (vui, "number of mem regions must be between 1 and %i",
- VHOST_MEMORY_MAX_NREGIONS);
- goto close_socket;
- }
-
- if (msg.memory.nregions != number_of_fds)
- {
- vu_log_debug (vui, "each memory region must have FD");
- goto close_socket;
- }
-
- /* Do the mmap without barrier sync */
- void *region_mmap_addr[VHOST_MEMORY_MAX_NREGIONS];
- for (i = 0; i < msg.memory.nregions; i++)
- {
- long page_sz = get_huge_page_size (fds[i]);
-
- /* align size to page */
- ssize_t map_sz = (msg.memory.regions[i].memory_size +
- msg.memory.regions[i].mmap_offset +
- page_sz - 1) & ~(page_sz - 1);
-
- region_mmap_addr[i] = mmap (0, map_sz, PROT_READ | PROT_WRITE,
- MAP_SHARED, fds[i], 0);
- if (region_mmap_addr[i] == MAP_FAILED)
- {
- vu_log_err (vui, "failed to map memory. errno is %d", errno);
- for (j = 0; j < i; j++)
- munmap (region_mmap_addr[j], map_sz);
- goto close_socket;
- }
- vu_log_debug (vui, "map memory region %d addr 0 len 0x%lx fd %d "
- "mapped 0x%lx page_sz 0x%x", i, map_sz, fds[i],
- region_mmap_addr[i], page_sz);
- }
-
- vlib_worker_thread_barrier_sync (vm);
- unmap_all_mem_regions (vui);
- for (i = 0; i < msg.memory.nregions; i++)
- {
- clib_memcpy_fast (&(vui->regions[i]), &msg.memory.regions[i],
- sizeof (vhost_user_memory_region_t));
-
- vui->region_mmap_addr[i] = region_mmap_addr[i];
- vui->region_guest_addr_lo[i] = vui->regions[i].guest_phys_addr;
- vui->region_guest_addr_hi[i] = vui->regions[i].guest_phys_addr +
- vui->regions[i].memory_size;
-
- vui->region_mmap_addr[i] += vui->regions[i].mmap_offset;
- vui->region_mmap_fd[i] = fds[i];
-
- vui->nregions++;
- }
-
- /*
- * Re-compute desc, used, and avail descriptor table if vring address
- * is set.
- */
- FOR_ALL_VHOST_RX_TXQ (q, vui)
- {
- if (vui->vrings[q].desc_user_addr && vui->vrings[q].used_user_addr &&
- vui->vrings[q].avail_user_addr)
- {
- vui->vrings[q].desc =
- map_user_mem (vui, vui->vrings[q].desc_user_addr);
- vui->vrings[q].used =
- map_user_mem (vui, vui->vrings[q].used_user_addr);
- vui->vrings[q].avail =
- map_user_mem (vui, vui->vrings[q].avail_user_addr);
- }
- }
- vlib_worker_thread_barrier_release (vm);
- break;
-
- case VHOST_USER_SET_VRING_NUM:
- vu_log_debug (vui, "if %d msg VHOST_USER_SET_VRING_NUM idx %d num %d",
- vui->hw_if_index, msg.state.index, msg.state.num);
-
- if ((msg.state.num > 32768) || /* maximum ring size is 32768 */
- (msg.state.num == 0) || /* it cannot be zero */
- ((msg.state.num - 1) & msg.state.num) || /* must be power of 2 */
- (msg.state.index >= vui->num_qid))
- {
- vu_log_debug (vui, "invalid VHOST_USER_SET_VRING_NUM: msg.state.num"
- " %d, msg.state.index %d, curruent max q %d",
- msg.state.num, msg.state.index, vui->num_qid);
- goto close_socket;
- }
- vui->vrings[msg.state.index].qsz_mask = msg.state.num - 1;
- break;
-
- case VHOST_USER_SET_VRING_ADDR:
- vu_log_debug (vui, "if %d msg VHOST_USER_SET_VRING_ADDR idx %d",
- vui->hw_if_index, msg.state.index);
-
- if (msg.state.index >= vui->num_qid)
- {
- vu_log_debug (vui, "invalid vring index VHOST_USER_SET_VRING_ADDR:"
- " %u >= %u", msg.state.index, vui->num_qid);
- goto close_socket;
- }
-
- if (msg.size < sizeof (msg.addr))
- {
- vu_log_debug (vui, "vhost message is too short (%d < %d)",
- msg.size, sizeof (msg.addr));
- goto close_socket;
- }
-
- vnet_virtio_vring_desc_t *desc =
- map_user_mem (vui, msg.addr.desc_user_addr);
- vnet_virtio_vring_used_t *used =
- map_user_mem (vui, msg.addr.used_user_addr);
- vnet_virtio_vring_avail_t *avail =
- map_user_mem (vui, msg.addr.avail_user_addr);
-
- if ((desc == NULL) || (used == NULL) || (avail == NULL))
- {
- vu_log_debug (vui, "failed to map user memory for hw_if_index %d",
- vui->hw_if_index);
- goto close_socket;
- }
-
- vui->vrings[msg.state.index].desc_user_addr = msg.addr.desc_user_addr;
- vui->vrings[msg.state.index].used_user_addr = msg.addr.used_user_addr;
- vui->vrings[msg.state.index].avail_user_addr = msg.addr.avail_user_addr;
-
- vlib_worker_thread_barrier_sync (vm);
- vui->vrings[msg.state.index].desc = desc;
- vui->vrings[msg.state.index].used = used;
- vui->vrings[msg.state.index].avail = avail;
-
- vui->vrings[msg.state.index].log_guest_addr = msg.addr.log_guest_addr;
- vui->vrings[msg.state.index].log_used =
- (msg.addr.flags & (1 << VHOST_VRING_F_LOG)) ? 1 : 0;
-
- /* Spec says: If VHOST_USER_F_PROTOCOL_FEATURES has not been negotiated,
- the ring is initialized in an enabled state. */
- if (!(vui->features & VIRTIO_FEATURE (VHOST_USER_F_PROTOCOL_FEATURES)))
- vui->vrings[msg.state.index].enabled = 1;
-
- vui->vrings[msg.state.index].last_used_idx =
- vui->vrings[msg.state.index].last_avail_idx =
- vui->vrings[msg.state.index].used->idx;
- vui->vrings[msg.state.index].last_kick =
- vui->vrings[msg.state.index].last_used_idx;
-
- /* tell driver that we want interrupts or not */
- vhost_user_set_operation_mode (vui, &vui->vrings[msg.state.index]);
- vlib_worker_thread_barrier_release (vm);
- vhost_user_update_iface_state (vui);
- break;
-
- case VHOST_USER_SET_OWNER:
- vu_log_debug (vui, "if %d msg VHOST_USER_SET_OWNER", vui->hw_if_index);
- break;
-
- case VHOST_USER_RESET_OWNER:
- vu_log_debug (vui, "if %d msg VHOST_USER_RESET_OWNER",
- vui->hw_if_index);
- break;
-
- case VHOST_USER_SET_VRING_CALL:
- vu_log_debug (vui, "if %d msg VHOST_USER_SET_VRING_CALL %d",
- vui->hw_if_index, msg.u64);
-
- q = (u8) (msg.u64 & 0xFF);
- if (vui->num_qid > q)
- {
- /* if there is old fd, delete and close it */
- if (vui->vrings[q].callfd_idx != ~0)
- {
- clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
- vui->vrings[q].callfd_idx);
- clib_file_del (&file_main, uf);
- vui->vrings[q].callfd_idx = ~0;
- }
- }
- else if (vec_len (vui->vrings) > q)
- {
- /* grow vrings by pair (RX + TX) */
- vui->num_qid = (q & 1) ? (q + 1) : (q + 2);
- }
- else
- {
- u32 i, new_max_q, old_max_q = vec_len (vui->vrings);
-
- /*
- * Double the array size if it is less than 64 entries.
- * Slow down thereafter.
- */
- if (vec_len (vui->vrings) < (VHOST_VRING_INIT_MQ_PAIR_SZ << 3))
- new_max_q = vec_len (vui->vrings) << 1;
- else
- new_max_q = vec_len (vui->vrings) +
- (VHOST_VRING_INIT_MQ_PAIR_SZ << 2);
- if (new_max_q > (VHOST_VRING_MAX_MQ_PAIR_SZ << 1))
- new_max_q = (VHOST_VRING_MAX_MQ_PAIR_SZ << 1);
-
- /* sync with the worker threads, vrings may move due to realloc */
- vlib_worker_thread_barrier_sync (vm);
- vec_validate_aligned (vui->vrings, new_max_q - 1,
- CLIB_CACHE_LINE_BYTES);
- vlib_worker_thread_barrier_release (vm);
-
- for (i = old_max_q; i < vec_len (vui->vrings); i++)
- vhost_user_vring_init (vui, i);
-
- /* grow vrings by pair (RX + TX) */
- vui->num_qid = (q & 1) ? (q + 1) : (q + 2);
- }
-
- if (!(msg.u64 & VHOST_USER_VRING_NOFD_MASK))
- {
- if (number_of_fds != 1)
- {
- vu_log_debug (vui, "More than one fd received !");
- goto close_socket;
- }
-
- template.read_function = vhost_user_callfd_read_ready;
- template.file_descriptor = fds[0];
- template.private_data =
- ((vui - vhost_user_main.vhost_user_interfaces) << 8) + q;
- template.description = format (0, "vhost user");
- vui->vrings[q].callfd_idx = clib_file_add (&file_main, &template);
- }
- else
- vui->vrings[q].callfd_idx = ~0;
- break;
-
- case VHOST_USER_SET_VRING_KICK:
- vu_log_debug (vui, "if %d msg VHOST_USER_SET_VRING_KICK %d",
- vui->hw_if_index, msg.u64);
-
- q = (u8) (msg.u64 & 0xFF);
- if (q >= vui->num_qid)
- {
- vu_log_debug (vui, "invalid vring index VHOST_USER_SET_VRING_KICK:"
- " %u >= %u", q, vui->num_qid);
- goto close_socket;
- }
-
- if (vui->vrings[q].kickfd_idx != ~0)
- {
- clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
- vui->vrings[q].kickfd_idx);
- clib_file_del (&file_main, uf);
- vui->vrings[q].kickfd_idx = ~0;
- }
-
- if (!(msg.u64 & VHOST_USER_VRING_NOFD_MASK))
- {
- if (number_of_fds != 1)
- {
- vu_log_debug (vui, "More than one fd received !");
- goto close_socket;
- }
-
- template.read_function = vhost_user_kickfd_read_ready;
- template.file_descriptor = fds[0];
- template.private_data =
- (((uword) (vui - vhost_user_main.vhost_user_interfaces)) << 8) +
- q;
- vui->vrings[q].kickfd_idx = clib_file_add (&file_main, &template);
- }
- else
- {
- //When no kickfd is set, the queue is initialized as started
- vui->vrings[q].kickfd_idx = ~0;
- vui->vrings[q].started = 1;
- vhost_user_thread_placement (vui, q);
- }
- vhost_user_update_iface_state (vui);
- break;
-
- case VHOST_USER_SET_VRING_ERR:
- vu_log_debug (vui, "if %d msg VHOST_USER_SET_VRING_ERR %d",
- vui->hw_if_index, msg.u64);
-
- q = (u8) (msg.u64 & 0xFF);
- if (q >= vui->num_qid)
- {
- vu_log_debug (vui, "invalid vring index VHOST_USER_SET_VRING_ERR:"
- " %u >= %u", q, vui->num_qid);
- goto close_socket;
- }
-
- if (vui->vrings[q].errfd != -1)
- close (vui->vrings[q].errfd);
-
- if (!(msg.u64 & VHOST_USER_VRING_NOFD_MASK))
- {
- if (number_of_fds != 1)
- goto close_socket;
-
- vui->vrings[q].errfd = fds[0];
- }
- else
- vui->vrings[q].errfd = -1;
- break;
-
- case VHOST_USER_SET_VRING_BASE:
- vu_log_debug (vui,
- "if %d msg VHOST_USER_SET_VRING_BASE idx %d num 0x%x",
- vui->hw_if_index, msg.state.index, msg.state.num);
- if (msg.state.index >= vui->num_qid)
- {
- vu_log_debug (vui, "invalid vring index VHOST_USER_SET_VRING_ADDR:"
- " %u >= %u", msg.state.index, vui->num_qid);
- goto close_socket;
- }
- vlib_worker_thread_barrier_sync (vm);
- vui->vrings[msg.state.index].last_avail_idx = msg.state.num;
- if (vhost_user_is_packed_ring_supported (vui))
- {
- /*
- * 0 1 2 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * | last avail idx | | last used idx | |
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ^ ^
- * | |
- * avail wrap counter used wrap counter
- */
- /* last avail idx at bit 0-14. */
- vui->vrings[msg.state.index].last_avail_idx =
- msg.state.num & 0x7fff;
- /* avail wrap counter at bit 15 */
- vui->vrings[msg.state.index].avail_wrap_counter =
- ! !(msg.state.num & (1 << 15));
-
- /*
- * Although last_used_idx is passed in the upper 16 bits in qemu
- * implementation, in practice, last_avail_idx and last_used_idx are
- * usually the same. As a result, DPDK does not bother to pass us
- * last_used_idx. The spec is not clear on thex coding. I figured it
- * out by reading the qemu code. So let's just read last_avail_idx
- * and set last_used_idx equals to last_avail_idx.
- */
- vui->vrings[msg.state.index].last_used_idx =
- vui->vrings[msg.state.index].last_avail_idx;
- vui->vrings[msg.state.index].last_kick =
- vui->vrings[msg.state.index].last_used_idx;
- vui->vrings[msg.state.index].used_wrap_counter =
- vui->vrings[msg.state.index].avail_wrap_counter;
-
- if (vui->vrings[msg.state.index].avail_wrap_counter == 1)
- vui->vrings[msg.state.index].avail_wrap_counter =
- VRING_DESC_F_AVAIL;
- }
- vlib_worker_thread_barrier_release (vm);
- break;
-
- case VHOST_USER_GET_VRING_BASE:
- if (msg.state.index >= vui->num_qid)
- {
- vu_log_debug (vui, "invalid vring index VHOST_USER_GET_VRING_BASE:"
- " %u >= %u", msg.state.index, vui->num_qid);
- goto close_socket;
- }
-
- /* protection is needed to prevent rx/tx from changing last_avail_idx */
- vlib_worker_thread_barrier_sync (vm);
- /*
- * Copy last_avail_idx from the vring before closing it because
- * closing the vring also initializes the vring last_avail_idx
- */
- msg.state.num = vui->vrings[msg.state.index].last_avail_idx;
- if (vhost_user_is_packed_ring_supported (vui))
- {
- msg.state.num =
- (vui->vrings[msg.state.index].last_avail_idx & 0x7fff) |
- (! !vui->vrings[msg.state.index].avail_wrap_counter << 15);
- msg.state.num |=
- ((vui->vrings[msg.state.index].last_used_idx & 0x7fff) |
- (! !vui->vrings[msg.state.index].used_wrap_counter << 15)) << 16;
- }
- msg.flags |= 4;
- msg.size = sizeof (msg.state);
-
- /*
- * Spec says: Client must [...] stop ring upon receiving
- * VHOST_USER_GET_VRING_BASE
- */
- vhost_user_vring_close (vui, msg.state.index);
- vlib_worker_thread_barrier_release (vm);
- vu_log_debug (vui,
- "if %d msg VHOST_USER_GET_VRING_BASE idx %d num 0x%x",
- vui->hw_if_index, msg.state.index, msg.state.num);
- n =
- send (uf->file_descriptor, &msg, VHOST_USER_MSG_HDR_SZ + msg.size, 0);
- if (n != (msg.size + VHOST_USER_MSG_HDR_SZ))
- {
- vu_log_debug (vui, "could not send message response");
- goto close_socket;
- }
- vhost_user_update_iface_state (vui);
- break;
-
- case VHOST_USER_NONE:
- vu_log_debug (vui, "if %d msg VHOST_USER_NONE", vui->hw_if_index);
- break;
-
- case VHOST_USER_SET_LOG_BASE:
- vu_log_debug (vui, "if %d msg VHOST_USER_SET_LOG_BASE",
- vui->hw_if_index);
-
- if (msg.size != sizeof (msg.log))
- {
- vu_log_debug (vui, "invalid msg size for VHOST_USER_SET_LOG_BASE:"
- " %d instead of %d", msg.size, sizeof (msg.log));
- goto close_socket;
- }
-
- if (!(vui->protocol_features & (1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD)))
- {
- vu_log_debug (vui, "VHOST_USER_PROTOCOL_F_LOG_SHMFD not set but "
- "VHOST_USER_SET_LOG_BASE received");
- goto close_socket;
- }
-
- fd = fds[0];
- /* align size to page */
- long page_sz = get_huge_page_size (fd);
- ssize_t map_sz =
- (msg.log.size + msg.log.offset + page_sz - 1) & ~(page_sz - 1);
-
- void *log_base_addr = mmap (0, map_sz, PROT_READ | PROT_WRITE,
- MAP_SHARED, fd, 0);
-
- vu_log_debug (vui, "map log region addr 0 len 0x%lx off 0x%lx fd %d "
- "mapped 0x%lx", map_sz, msg.log.offset, fd,
- log_base_addr);
-
- if (log_base_addr == MAP_FAILED)
- {
- vu_log_err (vui, "failed to map memory. errno is %d", errno);
- goto close_socket;
- }
-
- vlib_worker_thread_barrier_sync (vm);
- vui->log_base_addr = log_base_addr;
- vui->log_base_addr += msg.log.offset;
- vui->log_size = msg.log.size;
- vlib_worker_thread_barrier_release (vm);
-
- msg.flags |= 4;
- msg.size = sizeof (msg.u64);
- n =
- send (uf->file_descriptor, &msg, VHOST_USER_MSG_HDR_SZ + msg.size, 0);
- if (n != (msg.size + VHOST_USER_MSG_HDR_SZ))
- {
- vu_log_debug (vui, "could not send message response");
- goto close_socket;
- }
- break;
-
- case VHOST_USER_SET_LOG_FD:
- vu_log_debug (vui, "if %d msg VHOST_USER_SET_LOG_FD", vui->hw_if_index);
- break;
-
- case VHOST_USER_GET_PROTOCOL_FEATURES:
- msg.flags |= 4;
- msg.u64 = (1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD) |
- (1 << VHOST_USER_PROTOCOL_F_MQ);
- msg.size = sizeof (msg.u64);
- vu_log_debug (vui, "if %d msg VHOST_USER_GET_PROTOCOL_FEATURES - "
- "reply 0x%016llx", vui->hw_if_index, msg.u64);
- n =
- send (uf->file_descriptor, &msg, VHOST_USER_MSG_HDR_SZ + msg.size, 0);
- if (n != (msg.size + VHOST_USER_MSG_HDR_SZ))
- {
- vu_log_debug (vui, "could not send message response");
- goto close_socket;
- }
- break;
-
- case VHOST_USER_SET_PROTOCOL_FEATURES:
- vu_log_debug (vui, "if %d msg VHOST_USER_SET_PROTOCOL_FEATURES "
- "features 0x%016llx", vui->hw_if_index, msg.u64);
- vui->protocol_features = msg.u64;
- break;
-
- case VHOST_USER_GET_QUEUE_NUM:
- msg.flags |= 4;
- msg.u64 = VHOST_VRING_MAX_MQ_PAIR_SZ;
- msg.size = sizeof (msg.u64);
- vu_log_debug (vui, "if %d msg VHOST_USER_GET_QUEUE_NUM - reply %d",
- vui->hw_if_index, msg.u64);
- n =
- send (uf->file_descriptor, &msg, VHOST_USER_MSG_HDR_SZ + msg.size, 0);
- if (n != (msg.size + VHOST_USER_MSG_HDR_SZ))
- {
- vu_log_debug (vui, "could not send message response");
- goto close_socket;
- }
- break;
-
- case VHOST_USER_SET_VRING_ENABLE:
- vu_log_debug (vui, "if %d VHOST_USER_SET_VRING_ENABLE: %s queue %d",
- vui->hw_if_index, msg.state.num ? "enable" : "disable",
- msg.state.index);
- if (msg.state.index >= vui->num_qid)
- {
- vu_log_debug (vui, "invalid vring idx VHOST_USER_SET_VRING_ENABLE:"
- " %u >= %u", msg.state.index, vui->num_qid);
- goto close_socket;
- }
-
- vui->vrings[msg.state.index].enabled = msg.state.num;
- vhost_user_thread_placement (vui, msg.state.index);
- vhost_user_update_iface_state (vui);
- break;
-
- default:
- vu_log_debug (vui, "unknown vhost-user message %d received. "
- "closing socket", msg.request);
- goto close_socket;
- }
-
- return 0;
-
-close_socket:
- vlib_worker_thread_barrier_sync (vm);
- vhost_user_if_disconnect (vui);
- vlib_worker_thread_barrier_release (vm);
- vhost_user_update_iface_state (vui);
- return 0;
-}
-
-static clib_error_t *
-vhost_user_socket_error (clib_file_t * uf)
-{
- vlib_main_t *vm = vlib_get_main ();
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui =
- pool_elt_at_index (vum->vhost_user_interfaces, uf->private_data);
-
- vu_log_debug (vui, "socket error on if %d", vui->sw_if_index);
- vlib_worker_thread_barrier_sync (vm);
- vhost_user_if_disconnect (vui);
- vlib_worker_thread_barrier_release (vm);
- return 0;
-}
-
-static clib_error_t *
-vhost_user_socksvr_accept_ready (clib_file_t * uf)
-{
- int client_fd, client_len;
- struct sockaddr_un client;
- clib_file_t template = { 0 };
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui;
-
- vui = pool_elt_at_index (vum->vhost_user_interfaces, uf->private_data);
-
- client_len = sizeof (client);
- client_fd = accept (uf->file_descriptor,
- (struct sockaddr *) &client,
- (socklen_t *) & client_len);
-
- if (client_fd < 0)
- return clib_error_return_unix (0, "accept");
-
- if (vui->clib_file_index != ~0)
- {
- vu_log_debug (vui, "Close client socket for vhost interface %d, fd %d",
- vui->sw_if_index, UNIX_GET_FD (vui->clib_file_index));
- clib_file_del (&file_main, file_main.file_pool + vui->clib_file_index);
- }
-
- vu_log_debug (vui, "New client socket for vhost interface %d, fd %d",
- vui->sw_if_index, client_fd);
- template.read_function = vhost_user_socket_read;
- template.error_function = vhost_user_socket_error;
- template.file_descriptor = client_fd;
- template.private_data = vui - vhost_user_main.vhost_user_interfaces;
- template.description = format (0, "vhost interface %d", vui->sw_if_index);
- vui->clib_file_index = clib_file_add (&file_main, &template);
- vui->num_qid = 2;
- return 0;
-}
-
-static clib_error_t *
-vhost_user_init (vlib_main_t * vm)
-{
- vhost_user_main_t *vum = &vhost_user_main;
- vlib_thread_main_t *tm = vlib_get_thread_main ();
-
- vum->log_default = vlib_log_register_class ("vhost-user", 0);
-
- vum->coalesce_frames = 32;
- vum->coalesce_time = 1e-3;
-
- vec_validate (vum->cpus, tm->n_vlib_mains - 1);
-
- vhost_cpu_t *cpu;
- vec_foreach (cpu, vum->cpus)
- {
- /* This is actually not necessary as validate already zeroes it
- * Just keeping the loop here for later because I am lazy. */
- cpu->rx_buffers_len = 0;
- }
-
- vum->random = random_default_seed ();
-
- mhash_init_c_string (&vum->if_index_by_sock_name, sizeof (uword));
-
- return 0;
-}
-
-/* *INDENT-OFF* */
-VLIB_INIT_FUNCTION (vhost_user_init) =
-{
- .runs_after = VLIB_INITS("ip4_init"),
-};
-/* *INDENT-ON* */
-
-static uword
-vhost_user_send_interrupt_process (vlib_main_t * vm,
- vlib_node_runtime_t * rt, vlib_frame_t * f)
-{
- vhost_user_intf_t *vui;
- f64 timeout = 3153600000.0 /* 100 years */ ;
- uword event_type, *event_data = 0;
- vhost_user_main_t *vum = &vhost_user_main;
- u16 qid;
- f64 now, poll_time_remaining;
- f64 next_timeout;
- u8 stop_timer = 0;
-
- while (1)
- {
- poll_time_remaining =
- vlib_process_wait_for_event_or_clock (vm, timeout);
- event_type = vlib_process_get_events (vm, &event_data);
- vec_reset_length (event_data);
-
- /*
- * Use the remaining timeout if it is less than coalesce time to avoid
- * resetting the existing timer in the middle of expiration
- */
- timeout = poll_time_remaining;
- if (vlib_process_suspend_time_is_zero (timeout) ||
- (timeout > vum->coalesce_time))
- timeout = vum->coalesce_time;
-
- now = vlib_time_now (vm);
- switch (event_type)
- {
- case VHOST_USER_EVENT_STOP_TIMER:
- stop_timer = 1;
- break;
-
- case VHOST_USER_EVENT_START_TIMER:
- stop_timer = 0;
- timeout = 1e-3;
- if (!vlib_process_suspend_time_is_zero (poll_time_remaining))
- break;
- /* fall through */
-
- case ~0:
- /* *INDENT-OFF* */
- pool_foreach (vui, vum->vhost_user_interfaces) {
- next_timeout = timeout;
- FOR_ALL_VHOST_RX_TXQ (qid, vui)
- {
- vhost_user_vring_t *vq = &vui->vrings[qid];
-
- if (vq->started == 0)
- continue;
- if (vq->n_since_last_int)
- {
- if (now >= vq->int_deadline)
- vhost_user_send_call (vm, vui, vq);
- else
- next_timeout = vq->int_deadline - now;
- }
-
- if ((next_timeout < timeout) && (next_timeout > 0.0))
- timeout = next_timeout;
- }
- }
- /* *INDENT-ON* */
- break;
-
- default:
- clib_warning ("BUG: unhandled event type %d", event_type);
- break;
- }
- /* No less than 1 millisecond */
- if (timeout < 1e-3)
- timeout = 1e-3;
- if (stop_timer)
- timeout = 3153600000.0;
- }
- return 0;
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (vhost_user_send_interrupt_node) = {
- .function = vhost_user_send_interrupt_process,
- .type = VLIB_NODE_TYPE_PROCESS,
- .name = "vhost-user-send-interrupt-process",
-};
-/* *INDENT-ON* */
-
-static uword
-vhost_user_process (vlib_main_t * vm,
- vlib_node_runtime_t * rt, vlib_frame_t * f)
-{
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui;
- struct sockaddr_un sun;
- int sockfd;
- clib_file_t template = { 0 };
- f64 timeout = 3153600000.0 /* 100 years */ ;
- uword *event_data = 0;
-
- sockfd = -1;
- sun.sun_family = AF_UNIX;
- template.read_function = vhost_user_socket_read;
- template.error_function = vhost_user_socket_error;
-
- while (1)
- {
- vlib_process_wait_for_event_or_clock (vm, timeout);
- vlib_process_get_events (vm, &event_data);
- vec_reset_length (event_data);
-
- timeout = 3.0;
-
- /* *INDENT-OFF* */
- pool_foreach (vui, vum->vhost_user_interfaces) {
-
- if (vui->unix_server_index == ~0) { //Nothing to do for server sockets
- if (vui->clib_file_index == ~0)
- {
- if ((sockfd < 0) &&
- ((sockfd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0))
- {
- /*
- * 1st time error or new error for this interface,
- * spit out the message and record the error
- */
- if (!vui->sock_errno || (vui->sock_errno != errno))
- {
- clib_unix_warning
- ("Error: Could not open unix socket for %s",
- vui->sock_filename);
- vui->sock_errno = errno;
- }
- continue;
- }
-
- /* try to connect */
- strncpy (sun.sun_path, (char *) vui->sock_filename,
- sizeof (sun.sun_path) - 1);
- sun.sun_path[sizeof (sun.sun_path) - 1] = 0;
-
- /* Avoid hanging VPP if the other end does not accept */
- if (fcntl(sockfd, F_SETFL, O_NONBLOCK) < 0)
- clib_unix_warning ("fcntl");
-
- if (connect (sockfd, (struct sockaddr *) &sun,
- sizeof (struct sockaddr_un)) == 0)
- {
- /* Set the socket to blocking as it was before */
- if (fcntl(sockfd, F_SETFL, 0) < 0)
- clib_unix_warning ("fcntl2");
-
- vui->sock_errno = 0;
- template.file_descriptor = sockfd;
- template.private_data =
- vui - vhost_user_main.vhost_user_interfaces;
- template.description = format (0, "vhost user process");
- vui->clib_file_index = clib_file_add (&file_main, &template);
- vui->num_qid = 2;
-
- /* This sockfd is considered consumed */
- sockfd = -1;
- }
- else
- {
- vui->sock_errno = errno;
- }
- }
- else
- {
- /* check if socket is alive */
- int error = 0;
- socklen_t len = sizeof (error);
- int fd = UNIX_GET_FD(vui->clib_file_index);
- int retval =
- getsockopt (fd, SOL_SOCKET, SO_ERROR, &error, &len);
-
- if (retval)
- {
- vu_log_debug (vui, "getsockopt returned %d", retval);
- vhost_user_if_disconnect (vui);
- }
- }
- }
- }
- /* *INDENT-ON* */
- }
- return 0;
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (vhost_user_process_node,static) = {
- .function = vhost_user_process,
- .type = VLIB_NODE_TYPE_PROCESS,
- .name = "vhost-user-process",
-};
-/* *INDENT-ON* */
-
-/**
- * Disables and reset interface structure.
- * It can then be either init again, or removed from used interfaces.
- */
-static void
-vhost_user_term_if (vhost_user_intf_t * vui)
-{
- int q;
- vhost_user_main_t *vum = &vhost_user_main;
-
- // disconnect interface sockets
- vhost_user_if_disconnect (vui);
- vhost_user_update_gso_interface_count (vui, 0 /* delete */ );
- vhost_user_update_iface_state (vui);
-
- for (q = 0; q < vec_len (vui->vrings); q++)
- clib_spinlock_free (&vui->vrings[q].vring_lock);
-
- if (vui->unix_server_index != ~0)
- {
- //Close server socket
- clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
- vui->unix_server_index);
- clib_file_del (&file_main, uf);
- vui->unix_server_index = ~0;
- unlink (vui->sock_filename);
- }
-
- mhash_unset (&vum->if_index_by_sock_name, vui->sock_filename,
- &vui->if_index);
-}
-
-int
-vhost_user_delete_if (vnet_main_t * vnm, vlib_main_t * vm, u32 sw_if_index)
-{
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui;
- int rv = 0;
- vnet_hw_interface_t *hwif;
- u16 qid;
-
- if (!
- (hwif =
- vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index))
- || hwif->dev_class_index != vhost_user_device_class.index)
- return VNET_API_ERROR_INVALID_SW_IF_INDEX;
-
- vui = pool_elt_at_index (vum->vhost_user_interfaces, hwif->dev_instance);
-
- vu_log_debug (vui, "Deleting vhost-user interface %s (instance %d)",
- hwif->name, hwif->dev_instance);
-
- FOR_ALL_VHOST_TXQ (qid, vui)
- {
- vhost_user_vring_t *txvq = &vui->vrings[qid];
-
- if ((txvq->mode == VNET_HW_IF_RX_MODE_POLLING) &&
- (txvq->thread_index != ~0))
- {
- vhost_cpu_t *cpu = vec_elt_at_index (vum->cpus, txvq->thread_index);
- ASSERT (cpu->polling_q_count != 0);
- cpu->polling_q_count--;
- }
-
- if ((vum->ifq_count > 0) &&
- ((txvq->mode == VNET_HW_IF_RX_MODE_INTERRUPT) ||
- (txvq->mode == VNET_HW_IF_RX_MODE_ADAPTIVE)))
- {
- vum->ifq_count--;
- // Stop the timer if there is no more interrupt interface/queue
- if (vum->ifq_count == 0)
- {
- vlib_process_signal_event (vm,
- vhost_user_send_interrupt_node.index,
- VHOST_USER_EVENT_STOP_TIMER, 0);
- break;
- }
- }
- }
-
- // Disable and reset interface
- vhost_user_term_if (vui);
-
- // Reset renumbered iface
- if (hwif->dev_instance <
- vec_len (vum->show_dev_instance_by_real_dev_instance))
- vum->show_dev_instance_by_real_dev_instance[hwif->dev_instance] = ~0;
-
- // Delete ethernet interface
- ethernet_delete_interface (vnm, vui->hw_if_index);
-
- // free vrings
- vec_free (vui->vrings);
-
- // Back to pool
- pool_put (vum->vhost_user_interfaces, vui);
-
- return rv;
-}
-
-static clib_error_t *
-vhost_user_exit (vlib_main_t * vm)
-{
- vnet_main_t *vnm = vnet_get_main ();
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui;
-
- vlib_worker_thread_barrier_sync (vlib_get_main ());
- /* *INDENT-OFF* */
- pool_foreach (vui, vum->vhost_user_interfaces) {
- vhost_user_delete_if (vnm, vm, vui->sw_if_index);
- }
- /* *INDENT-ON* */
- vlib_worker_thread_barrier_release (vlib_get_main ());
- return 0;
-}
-
-VLIB_MAIN_LOOP_EXIT_FUNCTION (vhost_user_exit);
-
-/**
- * Open server unix socket on specified sock_filename.
- */
-static int
-vhost_user_init_server_sock (const char *sock_filename, int *sock_fd)
-{
- int rv = 0;
- struct sockaddr_un un = { };
- int fd;
- /* create listening socket */
- if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
- return VNET_API_ERROR_SYSCALL_ERROR_1;
-
- un.sun_family = AF_UNIX;
- strncpy ((char *) un.sun_path, (char *) sock_filename,
- sizeof (un.sun_path) - 1);
-
- /* remove if exists */
- unlink ((char *) sock_filename);
-
- if (bind (fd, (struct sockaddr *) &un, sizeof (un)) == -1)
- {
- rv = VNET_API_ERROR_SYSCALL_ERROR_2;
- goto error;
- }
-
- if (listen (fd, 1) == -1)
- {
- rv = VNET_API_ERROR_SYSCALL_ERROR_3;
- goto error;
- }
-
- *sock_fd = fd;
- return 0;
-
-error:
- close (fd);
- return rv;
-}
-
-/**
- * Create ethernet interface for vhost user interface.
- */
-static void
-vhost_user_create_ethernet (vnet_main_t *vnm, vlib_main_t *vm,
- vhost_user_intf_t *vui,
- vhost_user_create_if_args_t *args)
-{
- vhost_user_main_t *vum = &vhost_user_main;
- vnet_eth_interface_registration_t eir = {};
- u8 hwaddr[6];
-
- /* create hw and sw interface */
- if (args->use_custom_mac)
- {
- clib_memcpy (hwaddr, args->hwaddr, 6);
- }
- else
- {
- random_u32 (&vum->random);
- clib_memcpy (hwaddr + 2, &vum->random, sizeof (vum->random));
- hwaddr[0] = 2;
- hwaddr[1] = 0xfe;
- }
-
- eir.dev_class_index = vhost_user_device_class.index;
- eir.dev_instance = vui - vum->vhost_user_interfaces /* device instance */,
- eir.address = hwaddr;
- vui->hw_if_index = vnet_eth_register_interface (vnm, &eir);
-}
-
-/*
- * Initialize vui with specified attributes
- */
-static void
-vhost_user_vui_init (vnet_main_t * vnm, vhost_user_intf_t * vui,
- int server_sock_fd, vhost_user_create_if_args_t * args,
- u32 * sw_if_index)
-{
- vnet_sw_interface_t *sw;
- int q;
- vhost_user_main_t *vum = &vhost_user_main;
-
- sw = vnet_get_hw_sw_interface (vnm, vui->hw_if_index);
- if (server_sock_fd != -1)
- {
- clib_file_t template = { 0 };
- template.read_function = vhost_user_socksvr_accept_ready;
- template.file_descriptor = server_sock_fd;
- template.private_data = vui - vum->vhost_user_interfaces; //hw index
- template.description = format (0, "vhost user %d", sw);
- vui->unix_server_index = clib_file_add (&file_main, &template);
- }
- else
- {
- vui->unix_server_index = ~0;
- }
-
- vui->sw_if_index = sw->sw_if_index;
- strncpy (vui->sock_filename, args->sock_filename,
- ARRAY_LEN (vui->sock_filename) - 1);
- vui->sock_errno = 0;
- vui->is_ready = 0;
- vui->feature_mask = args->feature_mask;
- vui->clib_file_index = ~0;
- vui->log_base_addr = 0;
- vui->if_index = vui - vum->vhost_user_interfaces;
- vui->enable_gso = args->enable_gso;
- vui->enable_event_idx = args->enable_event_idx;
- vui->enable_packed = args->enable_packed;
- /*
- * enable_gso takes precedence over configurable feature mask if there
- * is a clash.
- * if feature mask disables gso, but enable_gso is configured,
- * then gso is enable
- * if feature mask enables gso, but enable_gso is not configured,
- * then gso is enable
- *
- * if gso is enable via feature mask, it must enable both host and guest
- * gso feature mask, we don't support one sided GSO or partial GSO.
- */
- if ((vui->enable_gso == 0) &&
- ((args->feature_mask & FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS)
- == (FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS)))
- vui->enable_gso = 1;
- vhost_user_update_gso_interface_count (vui, 1 /* add */ );
- mhash_set_mem (&vum->if_index_by_sock_name, vui->sock_filename,
- &vui->if_index, 0);
-
- vec_validate_aligned (vui->vrings, (VHOST_VRING_INIT_MQ_PAIR_SZ << 1) - 1,
- CLIB_CACHE_LINE_BYTES);
- vui->num_qid = 2;
- for (q = 0; q < vec_len (vui->vrings); q++)
- vhost_user_vring_init (vui, q);
-
- vnet_hw_if_set_caps (vnm, vui->hw_if_index, VNET_HW_IF_CAP_INT_MODE);
- vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
-
- if (sw_if_index)
- *sw_if_index = vui->sw_if_index;
-}
-
-int
-vhost_user_create_if (vnet_main_t * vnm, vlib_main_t * vm,
- vhost_user_create_if_args_t * args)
-{
- vhost_user_intf_t *vui = NULL;
- u32 sw_if_idx = ~0;
- int rv = 0;
- int server_sock_fd = -1;
- vhost_user_main_t *vum = &vhost_user_main;
- uword *if_index;
-
- if (args->sock_filename == NULL || !(strlen (args->sock_filename) > 0))
- {
- return VNET_API_ERROR_INVALID_ARGUMENT;
- }
-
- if_index = mhash_get (&vum->if_index_by_sock_name,
- (void *) args->sock_filename);
- if (if_index)
- {
- vui = &vum->vhost_user_interfaces[*if_index];
- args->sw_if_index = vui->sw_if_index;
- return VNET_API_ERROR_IF_ALREADY_EXISTS;
- }
-
- if (args->is_server)
- {
- if ((rv =
- vhost_user_init_server_sock (args->sock_filename,
- &server_sock_fd)) != 0)
- {
- return rv;
- }
- }
-
- /* Protect the uninitialized vui from being dispatched by rx/tx */
- vlib_worker_thread_barrier_sync (vm);
- pool_get (vhost_user_main.vhost_user_interfaces, vui);
- vhost_user_create_ethernet (vnm, vm, vui, args);
- vlib_worker_thread_barrier_release (vm);
-
- vhost_user_vui_init (vnm, vui, server_sock_fd, args, &sw_if_idx);
- vnet_sw_interface_set_mtu (vnm, vui->sw_if_index, 9000);
- vhost_user_rx_thread_placement (vui, 1);
-
- if (args->renumber)
- vnet_interface_name_renumber (sw_if_idx, args->custom_dev_instance);
-
- args->sw_if_index = sw_if_idx;
-
- // Process node must connect
- vlib_process_signal_event (vm, vhost_user_process_node.index, 0, 0);
-
- return rv;
-}
-
-int
-vhost_user_modify_if (vnet_main_t * vnm, vlib_main_t * vm,
- vhost_user_create_if_args_t * args)
-{
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui = NULL;
- u32 sw_if_idx = ~0;
- int server_sock_fd = -1;
- int rv = 0;
- vnet_hw_interface_t *hwif;
- uword *if_index;
-
- if (!(hwif = vnet_get_sup_hw_interface_api_visible_or_null (vnm,
- args->sw_if_index))
- || hwif->dev_class_index != vhost_user_device_class.index)
- return VNET_API_ERROR_INVALID_SW_IF_INDEX;
-
- if (args->sock_filename == NULL || !(strlen (args->sock_filename) > 0))
- return VNET_API_ERROR_INVALID_ARGUMENT;
-
- vui = vec_elt_at_index (vum->vhost_user_interfaces, hwif->dev_instance);
-
- /*
- * Disallow changing the interface to have the same path name
- * as other interface
- */
- if_index = mhash_get (&vum->if_index_by_sock_name,
- (void *) args->sock_filename);
- if (if_index && (*if_index != vui->if_index))
- return VNET_API_ERROR_IF_ALREADY_EXISTS;
-
- // First try to open server socket
- if (args->is_server)
- if ((rv = vhost_user_init_server_sock (args->sock_filename,
- &server_sock_fd)) != 0)
- return rv;
-
- vhost_user_term_if (vui);
- vhost_user_vui_init (vnm, vui, server_sock_fd, args, &sw_if_idx);
-
- if (args->renumber)
- vnet_interface_name_renumber (sw_if_idx, args->custom_dev_instance);
-
- // Process node must connect
- vlib_process_signal_event (vm, vhost_user_process_node.index, 0, 0);
-
- return rv;
-}
-
-clib_error_t *
-vhost_user_connect_command_fn (vlib_main_t * vm,
- unformat_input_t * input,
- vlib_cli_command_t * cmd)
-{
- vnet_main_t *vnm = vnet_get_main ();
- unformat_input_t _line_input, *line_input = &_line_input;
- clib_error_t *error = NULL;
- vhost_user_create_if_args_t args = { 0 };
- int rv;
-
- /* Get a line of input. */
- if (!unformat_user (input, unformat_line_input, line_input))
- return 0;
-
- args.feature_mask = (u64) ~ (0ULL);
- args.custom_dev_instance = ~0;
- /* GSO feature is disable by default */
- args.feature_mask &= ~FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS;
- /* packed-ring feature is disable by default */
- args.feature_mask &= ~VIRTIO_FEATURE (VIRTIO_F_RING_PACKED);
- /* event_idx feature is disable by default */
- args.feature_mask &= ~VIRTIO_FEATURE (VIRTIO_RING_F_EVENT_IDX);
-
- while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
- {
- if (unformat (line_input, "socket %s", &args.sock_filename))
- ;
- else if (unformat (line_input, "server"))
- args.is_server = 1;
- else if (unformat (line_input, "gso"))
- args.enable_gso = 1;
- else if (unformat (line_input, "packed"))
- args.enable_packed = 1;
- else if (unformat (line_input, "event-idx"))
- args.enable_event_idx = 1;
- else if (unformat (line_input, "feature-mask 0x%llx",
- &args.feature_mask))
- ;
- else if (unformat (line_input, "hwaddr %U", unformat_ethernet_address,
- args.hwaddr))
- args.use_custom_mac = 1;
- else if (unformat (line_input, "renumber %d",
- &args.custom_dev_instance))
- args.renumber = 1;
- else
- {
- error = clib_error_return (0, "unknown input `%U'",
- format_unformat_error, line_input);
- goto done;
- }
- }
-
- if ((rv = vhost_user_create_if (vnm, vm, &args)))
- {
- error = clib_error_return (0, "vhost_user_create_if returned %d", rv);
- goto done;
- }
-
- vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, vnm,
- args.sw_if_index);
-
-done:
- vec_free (args.sock_filename);
- unformat_free (line_input);
-
- return error;
-}
-
-clib_error_t *
-vhost_user_delete_command_fn (vlib_main_t * vm,
- unformat_input_t * input,
- vlib_cli_command_t * cmd)
-{
- unformat_input_t _line_input, *line_input = &_line_input;
- u32 sw_if_index = ~0;
- vnet_main_t *vnm = vnet_get_main ();
- clib_error_t *error = NULL;
-
- /* Get a line of input. */
- if (!unformat_user (input, unformat_line_input, line_input))
- return 0;
-
- while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
- {
- if (unformat (line_input, "sw_if_index %d", &sw_if_index))
- ;
- else if (unformat
- (line_input, "%U", unformat_vnet_sw_interface, vnm,
- &sw_if_index))
- {
- vnet_hw_interface_t *hwif =
- vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index);
- if (hwif == NULL ||
- vhost_user_device_class.index != hwif->dev_class_index)
- {
- error = clib_error_return (0, "Not a vhost interface");
- goto done;
- }
- }
- else
- {
- error = clib_error_return (0, "unknown input `%U'",
- format_unformat_error, line_input);
- goto done;
- }
- }
-
- vhost_user_delete_if (vnm, vm, sw_if_index);
-
-done:
- unformat_free (line_input);
-
- return error;
-}
-
-int
-vhost_user_dump_ifs (vnet_main_t * vnm, vlib_main_t * vm,
- vhost_user_intf_details_t ** out_vuids)
-{
- int rv = 0;
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui;
- vhost_user_intf_details_t *r_vuids = NULL;
- vhost_user_intf_details_t *vuid = NULL;
- u32 *hw_if_indices = 0;
- vnet_hw_interface_t *hi;
- int i;
-
- if (!out_vuids)
- return -1;
-
- pool_foreach (vui, vum->vhost_user_interfaces)
- vec_add1 (hw_if_indices, vui->hw_if_index);
-
- for (i = 0; i < vec_len (hw_if_indices); i++)
- {
- hi = vnet_get_hw_interface (vnm, hw_if_indices[i]);
- vui = pool_elt_at_index (vum->vhost_user_interfaces, hi->dev_instance);
-
- vec_add2 (r_vuids, vuid, 1);
- vuid->sw_if_index = vui->sw_if_index;
- vuid->virtio_net_hdr_sz = vui->virtio_net_hdr_sz;
- vuid->features = vui->features;
- vuid->num_regions = vui->nregions;
- vuid->is_server = vui->unix_server_index != ~0;
- vuid->sock_errno = vui->sock_errno;
- snprintf ((char *) vuid->sock_filename, sizeof (vuid->sock_filename),
- "%s", vui->sock_filename);
- memcpy_s (vuid->if_name, sizeof (vuid->if_name), hi->name,
- clib_min (vec_len (hi->name), sizeof (vuid->if_name) - 1));
- vuid->if_name[sizeof (vuid->if_name) - 1] = 0;
- }
-
- vec_free (hw_if_indices);
-
- *out_vuids = r_vuids;
-
- return rv;
-}
-
-static u8 *
-format_vhost_user_desc (u8 * s, va_list * args)
-{
- char *fmt = va_arg (*args, char *);
- vhost_user_intf_t *vui = va_arg (*args, vhost_user_intf_t *);
- vnet_virtio_vring_desc_t *desc_table =
- va_arg (*args, vnet_virtio_vring_desc_t *);
- int idx = va_arg (*args, int);
- u32 *mem_hint = va_arg (*args, u32 *);
-
- s = format (s, fmt, idx, desc_table[idx].addr, desc_table[idx].len,
- desc_table[idx].flags, desc_table[idx].next,
- pointer_to_uword (map_guest_mem (vui, desc_table[idx].addr,
- mem_hint)));
- return s;
-}
-
-static void
-vhost_user_show_fds (vlib_main_t * vm, vhost_user_vring_t * vq)
-{
- int kickfd = UNIX_GET_FD (vq->kickfd_idx);
- int callfd = UNIX_GET_FD (vq->callfd_idx);
-
- vlib_cli_output (vm, " kickfd %d callfd %d errfd %d\n", kickfd, callfd,
- vq->errfd);
-}
-
-static void
-vhost_user_show_desc (vlib_main_t * vm, vhost_user_intf_t * vui, int q,
- int show_descr, int show_verbose)
-{
- int j;
- u32 mem_hint = 0;
- u32 idx;
- u32 n_entries;
- vnet_virtio_vring_desc_t *desc_table;
- vhost_user_vring_t *vq = &vui->vrings[q];
-
- if (vq->avail && vq->used)
- vlib_cli_output (vm,
- " avail.flags %x avail event idx %u avail.idx %d "
- "used.flags %x used event idx %u used.idx %d\n",
- vq->avail->flags, vhost_user_avail_event_idx (vq),
- vq->avail->idx, vq->used->flags,
- vhost_user_used_event_idx (vq), vq->used->idx);
-
- vhost_user_show_fds (vm, vq);
-
- if (show_descr)
- {
- vlib_cli_output (vm, "\n descriptor table:\n");
- vlib_cli_output (vm,
- " slot addr len flags next "
- "user_addr\n");
- vlib_cli_output (vm,
- " ===== ================== ===== ====== ===== "
- "==================\n");
- for (j = 0; j < vq->qsz_mask + 1; j++)
- {
- desc_table = vq->desc;
- vlib_cli_output (vm, "%U", format_vhost_user_desc,
- " %-5d 0x%016lx %-5d 0x%04x %-5d 0x%016lx\n", vui,
- desc_table, j, &mem_hint);
- if (show_verbose && (desc_table[j].flags & VRING_DESC_F_INDIRECT))
- {
- n_entries =
- desc_table[j].len / sizeof (vnet_virtio_vring_desc_t);
- desc_table = map_guest_mem (vui, desc_table[j].addr, &mem_hint);
- if (desc_table)
- {
- for (idx = 0; idx < clib_min (20, n_entries); idx++)
- {
- vlib_cli_output
- (vm, "%U", format_vhost_user_desc,
- "> %-4u 0x%016lx %-5u 0x%04x %-5u 0x%016lx\n", vui,
- desc_table, idx, &mem_hint);
- }
- if (n_entries >= 20)
- vlib_cli_output (vm, "Skip displaying entries 20...%u\n",
- n_entries);
- }
- }
- }
- }
-}
-
-static u8 *
-format_vhost_user_packed_desc (u8 * s, va_list * args)
-{
- char *fmt = va_arg (*args, char *);
- vhost_user_intf_t *vui = va_arg (*args, vhost_user_intf_t *);
- vnet_virtio_vring_packed_desc_t *desc_table =
- va_arg (*args, vnet_virtio_vring_packed_desc_t *);
- int idx = va_arg (*args, int);
- u32 *mem_hint = va_arg (*args, u32 *);
-
- s = format (s, fmt, idx, desc_table[idx].addr, desc_table[idx].len,
- desc_table[idx].flags, desc_table[idx].id,
- pointer_to_uword (map_guest_mem (vui, desc_table[idx].addr,
- mem_hint)));
- return s;
-}
-
-static u8 *
-format_vhost_user_event_idx_flags (u8 * s, va_list * args)
-{
- u32 flags = va_arg (*args, u32);
- typedef struct
- {
- u8 value;
- char *str;
- } event_idx_flags;
- static event_idx_flags event_idx_array[] = {
-#define _(s,v) { .str = #s, .value = v, },
- foreach_virtio_event_idx_flags
-#undef _
- };
- u32 num_entries = sizeof (event_idx_array) / sizeof (event_idx_flags);
-
- if (flags < num_entries)
- s = format (s, "%s", event_idx_array[flags].str);
- else
- s = format (s, "%u", flags);
- return s;
-}
-
-static void
-vhost_user_show_desc_packed (vlib_main_t * vm, vhost_user_intf_t * vui, int q,
- int show_descr, int show_verbose)
-{
- int j;
- u32 mem_hint = 0;
- u32 idx;
- u32 n_entries;
- vnet_virtio_vring_packed_desc_t *desc_table;
- vhost_user_vring_t *vq = &vui->vrings[q];
- u16 off_wrap, event_idx;
-
- off_wrap = vq->avail_event->off_wrap;
- event_idx = off_wrap & 0x7fff;
- vlib_cli_output (vm, " avail_event.flags %U avail_event.off_wrap %u "
- "avail event idx %u\n", format_vhost_user_event_idx_flags,
- (u32) vq->avail_event->flags, off_wrap, event_idx);
-
- off_wrap = vq->used_event->off_wrap;
- event_idx = off_wrap & 0x7fff;
- vlib_cli_output (vm, " used_event.flags %U used_event.off_wrap %u "
- "used event idx %u\n", format_vhost_user_event_idx_flags,
- (u32) vq->used_event->flags, off_wrap, event_idx);
-
- vlib_cli_output (vm, " avail wrap counter %u, used wrap counter %u\n",
- vq->avail_wrap_counter, vq->used_wrap_counter);
-
- vhost_user_show_fds (vm, vq);
-
- if (show_descr)
- {
- vlib_cli_output (vm, "\n descriptor table:\n");
- vlib_cli_output (vm,
- " slot addr len flags id "
- "user_addr\n");
- vlib_cli_output (vm,
- " ===== ================== ===== ====== ===== "
- "==================\n");
- for (j = 0; j < vq->qsz_mask + 1; j++)
- {
- desc_table = vq->packed_desc;
- vlib_cli_output (vm, "%U", format_vhost_user_packed_desc,
- " %-5u 0x%016lx %-5u 0x%04x %-5u 0x%016lx\n", vui,
- desc_table, j, &mem_hint);
- if (show_verbose && (desc_table[j].flags & VRING_DESC_F_INDIRECT))
- {
- n_entries = desc_table[j].len >> 4;
- desc_table = map_guest_mem (vui, desc_table[j].addr, &mem_hint);
- if (desc_table)
- {
- for (idx = 0; idx < clib_min (20, n_entries); idx++)
- {
- vlib_cli_output
- (vm, "%U", format_vhost_user_packed_desc,
- "> %-4u 0x%016lx %-5u 0x%04x %-5u 0x%016lx\n", vui,
- desc_table, idx, &mem_hint);
- }
- if (n_entries >= 20)
- vlib_cli_output (vm, "Skip displaying entries 20...%u\n",
- n_entries);
- }
- }
- }
- }
-}
-
-clib_error_t *
-show_vhost_user_command_fn (vlib_main_t * vm,
- unformat_input_t * input,
- vlib_cli_command_t * cmd)
-{
- clib_error_t *error = 0;
- vnet_main_t *vnm = vnet_get_main ();
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui;
- u32 hw_if_index, *hw_if_indices = 0;
- vnet_hw_interface_t *hi;
- u16 qid;
- int i, j, q;
- int show_descr = 0;
- int show_verbose = 0;
- struct feat_struct
- {
- u8 bit;
- char *str;
- };
- struct feat_struct *feat_entry;
-
- static struct feat_struct feat_array[] = {
-#define _(s,b) { .str = #s, .bit = b, },
- foreach_virtio_net_features
-#undef _
- {.str = NULL}
- };
-
-#define foreach_protocol_feature \
- _(VHOST_USER_PROTOCOL_F_MQ) \
- _(VHOST_USER_PROTOCOL_F_LOG_SHMFD)
-
- static struct feat_struct proto_feat_array[] = {
-#define _(s) { .str = #s, .bit = s},
- foreach_protocol_feature
-#undef _
- {.str = NULL}
- };
-
- while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
- {
- if (unformat
- (input, "%U", unformat_vnet_hw_interface, vnm, &hw_if_index))
- {
- hi = vnet_get_hw_interface (vnm, hw_if_index);
- if (vhost_user_device_class.index != hi->dev_class_index)
- {
- error = clib_error_return (0, "unknown input `%U'",
- format_unformat_error, input);
- goto done;
- }
- vec_add1 (hw_if_indices, hw_if_index);
- }
- else if (unformat (input, "descriptors") || unformat (input, "desc"))
- show_descr = 1;
- else if (unformat (input, "verbose"))
- show_verbose = 1;
- else
- {
- error = clib_error_return (0, "unknown input `%U'",
- format_unformat_error, input);
- goto done;
- }
- }
- if (vec_len (hw_if_indices) == 0)
- {
- pool_foreach (vui, vum->vhost_user_interfaces)
- vec_add1 (hw_if_indices, vui->hw_if_index);
- }
- vlib_cli_output (vm, "Virtio vhost-user interfaces");
- vlib_cli_output (vm, "Global:\n coalesce frames %d time %e",
- vum->coalesce_frames, vum->coalesce_time);
- vlib_cli_output (vm, " Number of rx virtqueues in interrupt mode: %d",
- vum->ifq_count);
- vlib_cli_output (vm, " Number of GSO interfaces: %d", vum->gso_count);
- for (u32 tid = 0; tid <= vlib_num_workers (); tid++)
- {
- vhost_cpu_t *cpu = vec_elt_at_index (vum->cpus, tid);
- vlib_cli_output (vm, " Thread %u: Polling queue count %u", tid,
- cpu->polling_q_count);
- }
-
- for (i = 0; i < vec_len (hw_if_indices); i++)
- {
- hi = vnet_get_hw_interface (vnm, hw_if_indices[i]);
- vui = pool_elt_at_index (vum->vhost_user_interfaces, hi->dev_instance);
- vlib_cli_output (vm, "Interface: %U (ifindex %d)",
- format_vnet_hw_if_index_name, vnm, hw_if_indices[i],
- hw_if_indices[i]);
- vlib_cli_output (vm, " Number of qids %u", vui->num_qid);
- if (vui->enable_gso)
- vlib_cli_output (vm, " GSO enable");
- if (vui->enable_packed)
- vlib_cli_output (vm, " Packed ring enable");
- if (vui->enable_event_idx)
- vlib_cli_output (vm, " Event index enable");
-
- vlib_cli_output (vm, "virtio_net_hdr_sz %d\n"
- " features mask (0x%llx): \n"
- " features (0x%llx): \n",
- vui->virtio_net_hdr_sz, vui->feature_mask,
- vui->features);
-
- feat_entry = (struct feat_struct *) &feat_array;
- while (feat_entry->str)
- {
- if (vui->features & (1ULL << feat_entry->bit))
- vlib_cli_output (vm, " %s (%d)", feat_entry->str,
- feat_entry->bit);
- feat_entry++;
- }
-
- vlib_cli_output (vm, " protocol features (0x%llx)",
- vui->protocol_features);
- feat_entry = (struct feat_struct *) &proto_feat_array;
- while (feat_entry->str)
- {
- if (vui->protocol_features & (1ULL << feat_entry->bit))
- vlib_cli_output (vm, " %s (%d)", feat_entry->str,
- feat_entry->bit);
- feat_entry++;
- }
-
- vlib_cli_output (vm, "\n");
-
- vlib_cli_output (vm, " socket filename %s type %s errno \"%s\"\n\n",
- vui->sock_filename,
- (vui->unix_server_index != ~0) ? "server" : "client",
- strerror (vui->sock_errno));
-
- vlib_cli_output (vm, " rx placement: ");
-
- FOR_ALL_VHOST_TXQ (qid, vui)
- {
- vhost_user_vring_t *txvq = &vui->vrings[qid];
-
- if (txvq->qid == -1)
- continue;
- vlib_cli_output (vm, " thread %d on vring %d, %U\n",
- txvq->thread_index, qid, format_vnet_hw_if_rx_mode,
- txvq->mode);
- }
-
- vlib_cli_output (vm, " tx placement\n");
-
- FOR_ALL_VHOST_RXQ (qid, vui)
- {
- vhost_user_vring_t *rxvq = &vui->vrings[qid];
- vnet_hw_if_tx_queue_t *txq;
-
- if (rxvq->queue_index == ~0)
- continue;
- txq = vnet_hw_if_get_tx_queue (vnm, rxvq->queue_index);
- if (txq->threads)
- vlib_cli_output (vm, " threads %U on vring %u: %s\n",
- format_bitmap_list, txq->threads, qid,
- txq->shared_queue ? "spin-lock" : "lock-free");
- }
-
- vlib_cli_output (vm, "\n");
-
- vlib_cli_output (vm, " Memory regions (total %d)\n", vui->nregions);
-
- if (vui->nregions)
- {
- vlib_cli_output (vm,
- " region fd guest_phys_addr memory_size userspace_addr mmap_offset mmap_addr\n");
- vlib_cli_output (vm,
- " ====== ===== ================== ================== ================== ================== ==================\n");
- }
- for (j = 0; j < vui->nregions; j++)
- {
- vlib_cli_output (vm,
- " %d %-5d 0x%016lx 0x%016lx 0x%016lx 0x%016lx 0x%016lx\n",
- j, vui->region_mmap_fd[j],
- vui->regions[j].guest_phys_addr,
- vui->regions[j].memory_size,
- vui->regions[j].userspace_addr,
- vui->regions[j].mmap_offset,
- pointer_to_uword (vui->region_mmap_addr[j]));
- }
- FOR_ALL_VHOST_RX_TXQ (q, vui)
- {
- if (!vui->vrings[q].started)
- continue;
-
- vlib_cli_output (vm, "\n Virtqueue %d (%s%s)\n", q,
- (q & 1) ? "RX" : "TX",
- vui->vrings[q].enabled ? "" : " disabled");
- vlib_cli_output (vm, " global %s queue index %u\n",
- (q & 1) ? "RX" : "TX", vui->vrings[q].queue_index);
-
- vlib_cli_output (
- vm,
- " qsz %d last_avail_idx %d last_used_idx %d"
- " last_kick %u\n",
- vui->vrings[q].qsz_mask + 1, vui->vrings[q].last_avail_idx,
- vui->vrings[q].last_used_idx, vui->vrings[q].last_kick);
-
- if (vhost_user_is_packed_ring_supported (vui))
- vhost_user_show_desc_packed (vm, vui, q, show_descr, show_verbose);
- else
- vhost_user_show_desc (vm, vui, q, show_descr, show_verbose);
- }
- vlib_cli_output (vm, "\n");
- }
-done:
- vec_free (hw_if_indices);
- return error;
-}
-
-/*
- * CLI functions
- */
-
-/*?
- * Create a vHost User interface. Once created, a new virtual interface
- * will exist with the name '<em>VirtualEthernet0/0/x</em>', where '<em>x</em>'
- * is the next free index.
- *
- * There are several parameters associated with a vHost interface:
- *
- * - <b>socket <socket-filename></b> - Name of the linux socket used by
- * hypervisor and VPP to manage the vHost interface. If in <em>server</em>
- * mode, VPP will create the socket if it does not already exist. If in
- * <em>client</em> mode, hypervisor will create the socket if it does not
- * already exist. The VPP code is indifferent to the file location. However,
- * if SELinux is enabled, then the socket needs to be created in
- * <em>/var/run/vpp/</em>.
- *
- * - <b>server</b> - Optional flag to indicate that VPP should be the server
- * for the linux socket. If not provided, VPP will be the client. In
- * <em>server</em> mode, the VM can be reset without tearing down the vHost
- * Interface. In <em>client</em> mode, VPP can be reset without bringing down
- * the VM and tearing down the vHost Interface.
- *
- * - <b>feature-mask <hex></b> - Optional virtio/vhost feature set negotiated
- * at startup. <b>This is intended for degugging only.</b> It is recommended
- * that this parameter not be used except by experienced users. By default,
- * all supported features will be advertised. Otherwise, provide the set of
- * features desired.
- * - 0x000008000 (15) - VIRTIO_NET_F_MRG_RXBUF
- * - 0x000020000 (17) - VIRTIO_NET_F_CTRL_VQ
- * - 0x000200000 (21) - VIRTIO_NET_F_GUEST_ANNOUNCE
- * - 0x000400000 (22) - VIRTIO_NET_F_MQ
- * - 0x004000000 (26) - VHOST_F_LOG_ALL
- * - 0x008000000 (27) - VIRTIO_F_ANY_LAYOUT
- * - 0x010000000 (28) - VIRTIO_F_INDIRECT_DESC
- * - 0x040000000 (30) - VHOST_USER_F_PROTOCOL_FEATURES
- * - 0x100000000 (32) - VIRTIO_F_VERSION_1
- *
- * - <b>hwaddr <mac-addr></b> - Optional ethernet address, can be in either
- * X:X:X:X:X:X unix or X.X.X cisco format.
- *
- * - <b>renumber <dev_instance></b> - Optional parameter which allows the
- * instance in the name to be specified. If instance already exists, name
- * will be used anyway and multiple instances will have the same name. Use
- * with caution.
- *
- * @cliexpar
- * Example of how to create a vhost interface with VPP as the client and all
- * features enabled:
- * @cliexstart{create vhost-user socket /var/run/vpp/vhost1.sock}
- * VirtualEthernet0/0/0
- * @cliexend
- * Example of how to create a vhost interface with VPP as the server and with
- * just multiple queues enabled:
- * @cliexstart{create vhost-user socket /var/run/vpp/vhost2.sock server
- * feature-mask 0x40400000}
- * VirtualEthernet0/0/1
- * @cliexend
- * Once the vHost interface is created, enable the interface using:
- * @cliexcmd{set interface state VirtualEthernet0/0/0 up}
-?*/
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (vhost_user_connect_command, static) = {
- .path = "create vhost-user",
- .short_help = "create vhost-user socket <socket-filename> [server] "
- "[feature-mask <hex>] [hwaddr <mac-addr>] [renumber <dev_instance>] [gso] "
- "[packed] [event-idx]",
- .function = vhost_user_connect_command_fn,
- .is_mp_safe = 1,
-};
-/* *INDENT-ON* */
-
-/*?
- * Delete a vHost User interface using the interface name or the
- * software interface index. Use the '<em>show interface</em>'
- * command to determine the software interface index. On deletion,
- * the linux socket will not be deleted.
- *
- * @cliexpar
- * Example of how to delete a vhost interface by name:
- * @cliexcmd{delete vhost-user VirtualEthernet0/0/1}
- * Example of how to delete a vhost interface by software interface index:
- * @cliexcmd{delete vhost-user sw_if_index 1}
-?*/
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (vhost_user_delete_command, static) = {
- .path = "delete vhost-user",
- .short_help = "delete vhost-user {<interface> | sw_if_index <sw_idx>}",
- .function = vhost_user_delete_command_fn,
-};
-
-/*?
- * Display the attributes of a single vHost User interface (provide interface
- * name), multiple vHost User interfaces (provide a list of interface names
- * separated by spaces) or all Vhost User interfaces (omit an interface name
- * to display all vHost interfaces).
- *
- * @cliexpar
- * @parblock
- * Example of how to display a vhost interface:
- * @cliexstart{show vhost-user VirtualEthernet0/0/0}
- * Virtio vhost-user interfaces
- * Global:
- * coalesce frames 32 time 1e-3
- * Interface: VirtualEthernet0/0/0 (ifindex 1)
- * virtio_net_hdr_sz 12
- * features mask (0xffffffffffffffff):
- * features (0x50408000):
- * VIRTIO_NET_F_MRG_RXBUF (15)
- * VIRTIO_NET_F_MQ (22)
- * VIRTIO_F_INDIRECT_DESC (28)
- * VHOST_USER_F_PROTOCOL_FEATURES (30)
- * protocol features (0x3)
- * VHOST_USER_PROTOCOL_F_MQ (0)
- * VHOST_USER_PROTOCOL_F_LOG_SHMFD (1)
- *
- * socket filename /var/run/vpp/vhost1.sock type client errno "Success"
- *
- * rx placement:
- * thread 1 on vring 1
- * thread 1 on vring 5
- * thread 2 on vring 3
- * thread 2 on vring 7
- * tx placement: spin-lock
- * thread 0 on vring 0
- * thread 1 on vring 2
- * thread 2 on vring 0
- *
- * Memory regions (total 2)
- * region fd guest_phys_addr memory_size userspace_addr mmap_offset mmap_addr
- * ====== == =============== =========== ============== =========== ==========
- * 0 60 0x00000000 0x000a0000 0xaac00000 0x00000000 0x2b400000
- * 1 61 0x000c0000 0x3ff40000 0xaacc0000 0x000c0000 0xabcc0000
- *
- * Virtqueue 0 (TX)
- * qsz 256 last_avail_idx 0 last_used_idx 0
- * avail.flags 1 avail.idx 128 used.flags 1 used.idx 0
- * kickfd 62 callfd 64 errfd -1
- *
- * Virtqueue 1 (RX)
- * qsz 256 last_avail_idx 0 last_used_idx 0
- * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
- * kickfd 65 callfd 66 errfd -1
- *
- * Virtqueue 2 (TX)
- * qsz 256 last_avail_idx 0 last_used_idx 0
- * avail.flags 1 avail.idx 128 used.flags 1 used.idx 0
- * kickfd 63 callfd 70 errfd -1
- *
- * Virtqueue 3 (RX)
- * qsz 256 last_avail_idx 0 last_used_idx 0
- * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
- * kickfd 72 callfd 74 errfd -1
- *
- * Virtqueue 4 (TX disabled)
- * qsz 256 last_avail_idx 0 last_used_idx 0
- * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
- * kickfd 76 callfd 78 errfd -1
- *
- * Virtqueue 5 (RX disabled)
- * qsz 256 last_avail_idx 0 last_used_idx 0
- * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
- * kickfd 80 callfd 82 errfd -1
- *
- * Virtqueue 6 (TX disabled)
- * qsz 256 last_avail_idx 0 last_used_idx 0
- * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
- * kickfd 84 callfd 86 errfd -1
- *
- * Virtqueue 7 (RX disabled)
- * qsz 256 last_avail_idx 0 last_used_idx 0
- * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
- * kickfd 88 callfd 90 errfd -1
- *
- * @cliexend
- *
- * The optional '<em>descriptors</em>' parameter will display the same output
- * as the previous example but will include the descriptor table for each
- * queue.
- * The output is truncated below:
- * @cliexstart{show vhost-user VirtualEthernet0/0/0 descriptors}
- * Virtio vhost-user interfaces
- * Global:
- * coalesce frames 32 time 1e-3
- * Interface: VirtualEthernet0/0/0 (ifindex 1)
- * virtio_net_hdr_sz 12
- * features mask (0xffffffffffffffff):
- * features (0x50408000):
- * VIRTIO_NET_F_MRG_RXBUF (15)
- * VIRTIO_NET_F_MQ (22)
- * :
- * Virtqueue 0 (TX)
- * qsz 256 last_avail_idx 0 last_used_idx 0
- * avail.flags 1 avail.idx 128 used.flags 1 used.idx 0
- * kickfd 62 callfd 64 errfd -1
- *
- * descriptor table:
- * id addr len flags next user_addr
- * ===== ================== ===== ====== ===== ==================
- * 0 0x0000000010b6e974 2060 0x0002 1 0x00002aabbc76e974
- * 1 0x0000000010b6e034 2060 0x0002 2 0x00002aabbc76e034
- * 2 0x0000000010b6d6f4 2060 0x0002 3 0x00002aabbc76d6f4
- * 3 0x0000000010b6cdb4 2060 0x0002 4 0x00002aabbc76cdb4
- * 4 0x0000000010b6c474 2060 0x0002 5 0x00002aabbc76c474
- * 5 0x0000000010b6bb34 2060 0x0002 6 0x00002aabbc76bb34
- * 6 0x0000000010b6b1f4 2060 0x0002 7 0x00002aabbc76b1f4
- * 7 0x0000000010b6a8b4 2060 0x0002 8 0x00002aabbc76a8b4
- * 8 0x0000000010b69f74 2060 0x0002 9 0x00002aabbc769f74
- * 9 0x0000000010b69634 2060 0x0002 10 0x00002aabbc769634
- * 10 0x0000000010b68cf4 2060 0x0002 11 0x00002aabbc768cf4
- * :
- * 249 0x0000000000000000 0 0x0000 250 0x00002aab2b400000
- * 250 0x0000000000000000 0 0x0000 251 0x00002aab2b400000
- * 251 0x0000000000000000 0 0x0000 252 0x00002aab2b400000
- * 252 0x0000000000000000 0 0x0000 253 0x00002aab2b400000
- * 253 0x0000000000000000 0 0x0000 254 0x00002aab2b400000
- * 254 0x0000000000000000 0 0x0000 255 0x00002aab2b400000
- * 255 0x0000000000000000 0 0x0000 32768 0x00002aab2b400000
- *
- * Virtqueue 1 (RX)
- * qsz 256 last_avail_idx 0 last_used_idx 0
- * :
- * @cliexend
- * @endparblock
-?*/
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (show_vhost_user_command, static) = {
- .path = "show vhost-user",
- .short_help = "show vhost-user [<interface> [<interface> [..]]] "
- "[[descriptors] [verbose]]",
- .function = show_vhost_user_command_fn,
-};
-/* *INDENT-ON* */
-
-
-static clib_error_t *
-vhost_user_config (vlib_main_t * vm, unformat_input_t * input)
-{
- vhost_user_main_t *vum = &vhost_user_main;
-
- while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
- {
- if (unformat (input, "coalesce-frames %d", &vum->coalesce_frames))
- ;
- else if (unformat (input, "coalesce-time %f", &vum->coalesce_time))
- ;
- else if (unformat (input, "dont-dump-memory"))
- vum->dont_dump_vhost_user_memory = 1;
- else
- return clib_error_return (0, "unknown input `%U'",
- format_unformat_error, input);
- }
-
- return 0;
-}
-
-/* vhost-user { ... } configuration. */
-VLIB_CONFIG_FUNCTION (vhost_user_config, "vhost-user");
-
-void
-vhost_user_unmap_all (void)
-{
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui;
-
- if (vum->dont_dump_vhost_user_memory)
- {
- pool_foreach (vui, vum->vhost_user_interfaces)
- unmap_all_mem_regions (vui);
- }
-}
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
diff --git a/src/vnet/devices/virtio/vhost_user.h b/src/vnet/devices/virtio/vhost_user.h
deleted file mode 100644
index f44951e030a..00000000000
--- a/src/vnet/devices/virtio/vhost_user.h
+++ /dev/null
@@ -1,388 +0,0 @@
-/*
- * Copyright (c) 2015 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-#ifndef __VIRTIO_VHOST_USER_H__
-#define __VIRTIO_VHOST_USER_H__
-
-#include <vnet/devices/virtio/virtio_std.h>
-#include <vnet/devices/virtio/vhost_std.h>
-
-/* vhost-user data structures */
-
-#define VHOST_MEMORY_MAX_NREGIONS 8
-#define VHOST_USER_MSG_HDR_SZ 12
-#define VHOST_VRING_INIT_MQ_PAIR_SZ 8 //8TX + 8RX
-
-/*
- * qid is one byte in size in the spec. Please see VHOST_USER_SET_VRING_CALL,
- * VHOST_USER_SET_VRING_KICK, and VHOST_USER_SET_VRING_ERR.
- * The max number for q pair is naturally 128.
- */
-#define VHOST_VRING_MAX_MQ_PAIR_SZ 128
-#define VHOST_VRING_IDX_RX(qid) (2 * (qid))
-#define VHOST_VRING_IDX_TX(qid) (2 * (qid) + 1)
-
-#define VHOST_USER_VRING_NOFD_MASK 0x100
-
-#define VHOST_USER_PROTOCOL_F_MQ 0
-#define VHOST_USER_PROTOCOL_F_LOG_SHMFD 1
-#define VHOST_VRING_F_LOG 0
-
-#define VHOST_USER_PROTOCOL_FEATURES ((1ULL << VHOST_USER_PROTOCOL_F_MQ) | \
- (1ULL << VHOST_USER_PROTOCOL_F_LOG_SHMFD))
-
-#define vu_log_debug(dev, f, ...) \
-{ \
- vlib_log(VLIB_LOG_LEVEL_DEBUG, vhost_user_main.log_default, "%U: " f, \
- format_vnet_hw_if_index_name, vnet_get_main(), \
- dev->hw_if_index, ##__VA_ARGS__); \
-};
-
-#define vu_log_warn(dev, f, ...) \
-{ \
- vlib_log(VLIB_LOG_LEVEL_WARNING, vhost_user_main.log_default, "%U: " f, \
- format_vnet_hw_if_index_name, vnet_get_main(), \
- dev->hw_if_index, ##__VA_ARGS__); \
-};
-#define vu_log_err(dev, f, ...) \
-{ \
- vlib_log(VLIB_LOG_LEVEL_ERR, vhost_user_main.log_default, "%U: " f, \
- format_vnet_hw_if_index_name, vnet_get_main(), \
- dev->hw_if_index, ##__VA_ARGS__); \
-};
-
-#define UNIX_GET_FD(unixfd_idx) ({ \
- typeof(unixfd_idx) __unixfd_idx = (unixfd_idx); \
- (__unixfd_idx != ~0) ? \
- pool_elt_at_index (file_main.file_pool, \
- __unixfd_idx)->file_descriptor : -1; })
-
-#define foreach_virtio_trace_flags \
- _ (SIMPLE_CHAINED, 0, "Simple descriptor chaining") \
- _ (SINGLE_DESC, 1, "Single descriptor packet") \
- _ (INDIRECT, 2, "Indirect descriptor") \
- _ (MAP_ERROR, 4, "Memory mapping error")
-
-typedef enum
-{
-#define _(n,i,s) VIRTIO_TRACE_F_##n,
- foreach_virtio_trace_flags
-#undef _
-} virtio_trace_flag_t;
-
-#define FEATURE_VIRTIO_NET_F_HOST_TSO_FEATURE_BITS \
- (VIRTIO_FEATURE (VIRTIO_NET_F_CSUM) | \
- VIRTIO_FEATURE (VIRTIO_NET_F_HOST_UFO) | \
- VIRTIO_FEATURE (VIRTIO_NET_F_HOST_TSO4) | \
- VIRTIO_FEATURE (VIRTIO_NET_F_HOST_TSO6))
-
-#define FEATURE_VIRTIO_NET_F_GUEST_TSO_FEATURE_BITS \
- (VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_CSUM) | \
- VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_UFO) | \
- VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_TSO4) | \
- VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_TSO6))
-
-#define FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS \
- (FEATURE_VIRTIO_NET_F_HOST_TSO_FEATURE_BITS | \
- FEATURE_VIRTIO_NET_F_GUEST_TSO_FEATURE_BITS)
-
-
-typedef struct
-{
- char *sock_filename;
- u64 feature_mask;
- u32 custom_dev_instance;
- u8 hwaddr[6];
- u8 renumber;
- u8 is_server;
- u8 enable_gso;
- u8 enable_packed;
- u8 enable_event_idx;
- u8 use_custom_mac;
-
- /* return */
- u32 sw_if_index;
-} vhost_user_create_if_args_t;
-
-int vhost_user_create_if (vnet_main_t * vnm, vlib_main_t * vm,
- vhost_user_create_if_args_t * args);
-int vhost_user_modify_if (vnet_main_t * vnm, vlib_main_t * vm,
- vhost_user_create_if_args_t * args);
-int vhost_user_delete_if (vnet_main_t * vnm, vlib_main_t * vm,
- u32 sw_if_index);
-
-/* *INDENT-OFF* */
-typedef struct vhost_user_memory_region
-{
- u64 guest_phys_addr;
- u64 memory_size;
- u64 userspace_addr;
- u64 mmap_offset;
-} __attribute ((packed)) vhost_user_memory_region_t;
-
-typedef struct vhost_user_memory
-{
- u32 nregions;
- u32 padding;
- vhost_user_memory_region_t regions[VHOST_MEMORY_MAX_NREGIONS];
-} __attribute ((packed)) vhost_user_memory_t;
-
-typedef enum vhost_user_req
-{
- VHOST_USER_NONE = 0,
- VHOST_USER_GET_FEATURES = 1,
- VHOST_USER_SET_FEATURES = 2,
- VHOST_USER_SET_OWNER = 3,
- VHOST_USER_RESET_OWNER = 4,
- VHOST_USER_SET_MEM_TABLE = 5,
- VHOST_USER_SET_LOG_BASE = 6,
- VHOST_USER_SET_LOG_FD = 7,
- VHOST_USER_SET_VRING_NUM = 8,
- VHOST_USER_SET_VRING_ADDR = 9,
- VHOST_USER_SET_VRING_BASE = 10,
- VHOST_USER_GET_VRING_BASE = 11,
- VHOST_USER_SET_VRING_KICK = 12,
- VHOST_USER_SET_VRING_CALL = 13,
- VHOST_USER_SET_VRING_ERR = 14,
- VHOST_USER_GET_PROTOCOL_FEATURES = 15,
- VHOST_USER_SET_PROTOCOL_FEATURES = 16,
- VHOST_USER_GET_QUEUE_NUM = 17,
- VHOST_USER_SET_VRING_ENABLE = 18,
- VHOST_USER_MAX
-} vhost_user_req_t;
-
-typedef struct vhost_user_msg {
- vhost_user_req_t request;
- u32 flags;
- u32 size;
- union
- {
- u64 u64;
- vhost_vring_state_t state;
- vhost_vring_addr_t addr;
- vhost_user_memory_t memory;
- vhost_user_log_t log;
- };
-} __attribute ((packed)) vhost_user_msg_t;
-/* *INDENT-ON* */
-
-typedef struct
-{
- CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
- u16 qsz_mask;
- u16 last_avail_idx;
- u16 last_used_idx;
- u16 n_since_last_int;
- union
- {
- vnet_virtio_vring_desc_t *desc;
- vnet_virtio_vring_packed_desc_t *packed_desc;
- };
- union
- {
- vnet_virtio_vring_avail_t *avail;
- vnet_virtio_vring_desc_event_t *avail_event;
- };
- union
- {
- vnet_virtio_vring_used_t *used;
- vnet_virtio_vring_desc_event_t *used_event;
- };
- uword desc_user_addr;
- uword used_user_addr;
- uword avail_user_addr;
- f64 int_deadline;
- u8 started;
- u8 enabled;
- u8 log_used;
- clib_spinlock_t vring_lock;
-
- //Put non-runtime in a different cache line
- CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
- int errfd;
- u32 callfd_idx;
- u32 kickfd_idx;
- u64 log_guest_addr;
-
- /* The rx queue policy (interrupt/adaptive/polling) for this queue */
- u32 mode;
-
- /*
- * It contains the device queue number. -1 if it does not. The idea is
- * to not invoke vnet_hw_interface_assign_rx_thread and
- * vnet_hw_interface_unassign_rx_thread more than once for the duration of
- * the interface even if it is disconnected and reconnected.
- */
- i16 qid;
-
- u16 used_wrap_counter;
- u16 avail_wrap_counter;
- u16 last_kick;
- u8 first_kick;
- u32 queue_index;
- u32 thread_index;
-} vhost_user_vring_t;
-
-#define VHOST_USER_EVENT_START_TIMER 1
-#define VHOST_USER_EVENT_STOP_TIMER 2
-
-typedef struct
-{
- CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
- u32 is_ready;
- u32 admin_up;
- u32 unix_server_index;
- u32 clib_file_index;
- char sock_filename[256];
- int sock_errno;
- uword if_index;
- u32 hw_if_index, sw_if_index;
-
- //Feature negotiation
- u64 features;
- u64 feature_mask;
- u64 protocol_features;
-
- //Memory region information
- u32 nregions;
- vhost_user_memory_region_t regions[VHOST_MEMORY_MAX_NREGIONS];
- void *region_mmap_addr[VHOST_MEMORY_MAX_NREGIONS];
- u64 region_guest_addr_lo[VHOST_MEMORY_MAX_NREGIONS];
- u64 region_guest_addr_hi[VHOST_MEMORY_MAX_NREGIONS];
- u32 region_mmap_fd[VHOST_MEMORY_MAX_NREGIONS];
-
- //Virtual rings
- vhost_user_vring_t *vrings;
-
- /*
- * vrings is a dynamic array. It may have more elements than it is
- * currently used. num_qid indicates the current total qid's in the
- * vrings. For example, vec_len(vrings) = 64, num_qid = 60, so the
- * current valid/used qid is (0, 59) in the vrings array.
- */
- u32 num_qid;
-
- int virtio_net_hdr_sz;
- int is_any_layout;
-
- void *log_base_addr;
- u64 log_size;
-
- u8 enable_gso;
-
- /* Packed ring configured */
- u8 enable_packed;
-
- u8 enable_event_idx;
-} vhost_user_intf_t;
-
-#define FOR_ALL_VHOST_TXQ(qid, vui) for (qid = 1; qid < vui->num_qid; qid += 2)
-
-#define FOR_ALL_VHOST_RXQ(qid, vui) for (qid = 0; qid < vui->num_qid; qid += 2)
-
-#define FOR_ALL_VHOST_RX_TXQ(qid, vui) for (qid = 0; qid < vui->num_qid; qid++)
-
-typedef struct
-{
- uword dst;
- uword src;
- u32 len;
-} vhost_copy_t;
-
-typedef struct
-{
- u16 qid; /** The interface queue index (Not the virtio vring idx) */
- u16 device_index; /** The device index */
- u32 virtio_ring_flags; /** Runtime queue flags **/
- u16 first_desc_len; /** Length of the first data descriptor **/
- vnet_virtio_net_hdr_mrg_rxbuf_t hdr; /** Virtio header **/
-} vhost_trace_t;
-
-#define VHOST_USER_RX_BUFFERS_N (2 * VLIB_FRAME_SIZE + 2)
-#define VHOST_USER_COPY_ARRAY_N (4 * VLIB_FRAME_SIZE)
-
-typedef struct
-{
- u32 rx_buffers_len;
- u32 rx_buffers[VHOST_USER_RX_BUFFERS_N];
-
- vnet_virtio_net_hdr_mrg_rxbuf_t tx_headers[VLIB_FRAME_SIZE];
- vhost_copy_t copy[VHOST_USER_COPY_ARRAY_N];
-
- /* This is here so it doesn't end-up
- * using stack or registers. */
- vhost_trace_t *current_trace;
-
- u32 *to_next_list;
- vlib_buffer_t **rx_buffers_pdesc;
- u32 polling_q_count;
-} vhost_cpu_t;
-
-typedef struct
-{
- mhash_t if_index_by_sock_name;
- u32 mtu_bytes;
- vhost_user_intf_t *vhost_user_interfaces;
- u32 *show_dev_instance_by_real_dev_instance;
- u32 coalesce_frames;
- f64 coalesce_time;
- int dont_dump_vhost_user_memory;
-
- /** Per-CPU data for vhost-user */
- vhost_cpu_t *cpus;
-
- /** Pseudo random iterator */
- u32 random;
-
- /* The number of rx interface/queue pairs in interrupt mode */
- u32 ifq_count;
-
- /* logging */
- vlib_log_class_t log_default;
-
- /* gso interface count */
- u32 gso_count;
-} vhost_user_main_t;
-
-typedef struct
-{
- u8 if_name[64];
- u32 sw_if_index;
- u32 virtio_net_hdr_sz;
- u64 features;
- u8 is_server;
- u8 sock_filename[256];
- u32 num_regions;
- int sock_errno;
-} vhost_user_intf_details_t;
-
-int vhost_user_dump_ifs (vnet_main_t * vnm, vlib_main_t * vm,
- vhost_user_intf_details_t ** out_vuids);
-void vhost_user_set_operation_mode (vhost_user_intf_t *vui,
- vhost_user_vring_t *txvq);
-
-extern vlib_node_registration_t vhost_user_send_interrupt_node;
-extern vnet_device_class_t vhost_user_device_class;
-extern vlib_node_registration_t vhost_user_input_node;
-extern vhost_user_main_t vhost_user_main;
-
-#endif
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
diff --git a/src/vnet/devices/virtio/vhost_user_api.c b/src/vnet/devices/virtio/vhost_user_api.c
deleted file mode 100644
index cc1896b108a..00000000000
--- a/src/vnet/devices/virtio/vhost_user_api.c
+++ /dev/null
@@ -1,352 +0,0 @@
-/*
- *------------------------------------------------------------------
- * vhost-user_api.c - vhost-user api
- *
- * Copyright (c) 2016 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *------------------------------------------------------------------
- */
-
-#include <vnet/vnet.h>
-#include <vlibmemory/api.h>
-
-#include <vnet/interface.h>
-#include <vnet/api_errno.h>
-#include <vnet/devices/virtio/vhost_user.h>
-#include <vnet/ethernet/ethernet.h>
-#include <vnet/ethernet/ethernet_types_api.h>
-#include <vnet/devices/virtio/virtio_types_api.h>
-
-#include <vnet/format_fns.h>
-#include <vnet/devices/virtio/vhost_user.api_enum.h>
-#include <vnet/devices/virtio/vhost_user.api_types.h>
-
-#define REPLY_MSG_ID_BASE msg_id_base
-#include <vlibapi/api_helper_macros.h>
-
-static u16 msg_id_base;
-
-static void
-vl_api_create_vhost_user_if_t_handler (vl_api_create_vhost_user_if_t * mp)
-{
- int rv = 0;
- vl_api_create_vhost_user_if_reply_t *rmp;
- vnet_main_t *vnm = vnet_get_main ();
- vlib_main_t *vm = vlib_get_main ();
- u64 disabled_features = (u64) (0ULL);
- vhost_user_create_if_args_t args = { 0 };
-
- args.sw_if_index = (u32) ~ 0;
- args.feature_mask = (u64) ~ (0ULL);
- if (mp->disable_mrg_rxbuf)
- disabled_features = VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF);
-
- if (mp->disable_indirect_desc)
- disabled_features |= VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC);
-
- /*
- * GSO and PACKED are not supported by feature mask via binary API. We
- * disable GSO and PACKED feature in the feature mask. They may be enabled
- * explicitly via enable_gso and enable_packed argument
- */
- disabled_features |= FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS |
- VIRTIO_FEATURE (VIRTIO_F_RING_PACKED);
-
- /* EVENT_IDX is disabled by default */
- disabled_features |= VIRTIO_FEATURE (VIRTIO_RING_F_EVENT_IDX);
- args.feature_mask &= ~disabled_features;
-
- if (mp->use_custom_mac)
- mac_address_decode (mp->mac_address, (mac_address_t *) args.hwaddr);
-
- args.use_custom_mac = mp->use_custom_mac;
- args.is_server = mp->is_server;
- args.sock_filename = (char *) mp->sock_filename;
- args.renumber = mp->renumber;
- args.custom_dev_instance = ntohl (mp->custom_dev_instance);
- args.enable_gso = mp->enable_gso;
- args.enable_packed = mp->enable_packed;
- rv = vhost_user_create_if (vnm, vm, &args);
-
- /* Remember an interface tag for the new interface */
- if (rv == 0)
- {
- /* If a tag was supplied... */
- if (mp->tag[0])
- {
- /* Make sure it's a proper C-string */
- mp->tag[ARRAY_LEN (mp->tag) - 1] = 0;
- u8 *tag = format (0, "%s%c", mp->tag, 0);
- vnet_set_sw_interface_tag (vnm, tag, args.sw_if_index);
- }
- }
-
- /* *INDENT-OFF* */
- REPLY_MACRO2(VL_API_CREATE_VHOST_USER_IF_REPLY,
- ({
- rmp->sw_if_index = ntohl (args.sw_if_index);
- }));
- /* *INDENT-ON* */
-}
-
-static void
-vl_api_modify_vhost_user_if_t_handler (vl_api_modify_vhost_user_if_t * mp)
-{
- int rv = 0;
- vl_api_modify_vhost_user_if_reply_t *rmp;
- u64 disabled_features = (u64) (0ULL);
- vhost_user_create_if_args_t args = { 0 };
- vnet_main_t *vnm = vnet_get_main ();
- vlib_main_t *vm = vlib_get_main ();
-
- args.feature_mask = (u64) ~ (0ULL);
- /*
- * GSO and PACKED are not supported by feature mask via binary API. We
- * disable GSO and PACKED feature in the feature mask. They may be enabled
- * explicitly via enable_gso and enable_packed argument
- */
- disabled_features |= FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS |
- VIRTIO_FEATURE (VIRTIO_F_RING_PACKED);
-
- /* EVENT_IDX is disabled by default */
- disabled_features |= VIRTIO_FEATURE (VIRTIO_RING_F_EVENT_IDX);
- args.feature_mask &= ~disabled_features;
-
- args.sw_if_index = ntohl (mp->sw_if_index);
- args.sock_filename = (char *) mp->sock_filename;
- args.is_server = mp->is_server;
- args.renumber = mp->renumber;
- args.custom_dev_instance = ntohl (mp->custom_dev_instance);
- args.enable_gso = mp->enable_gso;
- args.enable_packed = mp->enable_packed;
- rv = vhost_user_modify_if (vnm, vm, &args);
-
- REPLY_MACRO (VL_API_MODIFY_VHOST_USER_IF_REPLY);
-}
-
-static void
-vl_api_create_vhost_user_if_v2_t_handler (vl_api_create_vhost_user_if_v2_t *
- mp)
-{
- int rv = 0;
- vl_api_create_vhost_user_if_v2_reply_t *rmp;
- vnet_main_t *vnm = vnet_get_main ();
- vlib_main_t *vm = vlib_get_main ();
- u64 disabled_features = (u64) (0ULL);
- vhost_user_create_if_args_t args = { 0 };
-
- args.sw_if_index = (u32) ~ 0;
- args.feature_mask = (u64) ~ (0ULL);
- if (mp->disable_mrg_rxbuf)
- disabled_features = VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF);
-
- if (mp->disable_indirect_desc)
- disabled_features |= VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC);
-
- /*
- * GSO and PACKED are not supported by feature mask via binary API. We
- * disable GSO and PACKED feature in the feature mask. They may be enabled
- * explicitly via enable_gso and enable_packed argument
- */
- disabled_features |= FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS |
- VIRTIO_FEATURE (VIRTIO_F_RING_PACKED);
-
- /* EVENT_IDX is disabled by default */
- disabled_features |= VIRTIO_FEATURE (VIRTIO_RING_F_EVENT_IDX);
- args.feature_mask &= ~disabled_features;
-
- if (mp->use_custom_mac)
- mac_address_decode (mp->mac_address, (mac_address_t *) args.hwaddr);
-
- args.use_custom_mac = mp->use_custom_mac;
- args.is_server = mp->is_server;
- args.sock_filename = (char *) mp->sock_filename;
- args.renumber = mp->renumber;
- args.custom_dev_instance = ntohl (mp->custom_dev_instance);
- args.enable_gso = mp->enable_gso;
- args.enable_packed = mp->enable_packed;
- args.enable_event_idx = mp->enable_event_idx;
- rv = vhost_user_create_if (vnm, vm, &args);
-
- /* Remember an interface tag for the new interface */
- if (rv == 0)
- {
- /* If a tag was supplied... */
- if (mp->tag[0])
- {
- /* Make sure it's a proper C-string */
- mp->tag[ARRAY_LEN (mp->tag) - 1] = 0;
- u8 *tag = format (0, "%s%c", mp->tag, 0);
- vnet_set_sw_interface_tag (vnm, tag, args.sw_if_index);
- }
- }
-
- /* *INDENT-OFF* */
- REPLY_MACRO2(VL_API_CREATE_VHOST_USER_IF_V2_REPLY,
- ({
- rmp->sw_if_index = ntohl (args.sw_if_index);
- }));
- /* *INDENT-ON* */
-}
-
-static void
-vl_api_modify_vhost_user_if_v2_t_handler (vl_api_modify_vhost_user_if_v2_t *
- mp)
-{
- int rv = 0;
- vl_api_modify_vhost_user_if_v2_reply_t *rmp;
- u64 disabled_features = (u64) (0ULL);
- vhost_user_create_if_args_t args = { 0 };
- vnet_main_t *vnm = vnet_get_main ();
- vlib_main_t *vm = vlib_get_main ();
-
- args.feature_mask = (u64) ~ (0ULL);
- /*
- * GSO and PACKED are not supported by feature mask via binary API. We
- * disable GSO and PACKED feature in the feature mask. They may be enabled
- * explicitly via enable_gso and enable_packed argument
- */
- disabled_features |= FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS |
- VIRTIO_FEATURE (VIRTIO_F_RING_PACKED);
-
- /* EVENT_IDX is disabled by default */
- disabled_features |= VIRTIO_FEATURE (VIRTIO_RING_F_EVENT_IDX);
- args.feature_mask &= ~disabled_features;
-
- args.sw_if_index = ntohl (mp->sw_if_index);
- args.sock_filename = (char *) mp->sock_filename;
- args.is_server = mp->is_server;
- args.renumber = mp->renumber;
- args.custom_dev_instance = ntohl (mp->custom_dev_instance);
- args.enable_gso = mp->enable_gso;
- args.enable_packed = mp->enable_packed;
- args.enable_event_idx = mp->enable_event_idx;
- rv = vhost_user_modify_if (vnm, vm, &args);
-
- REPLY_MACRO (VL_API_MODIFY_VHOST_USER_IF_V2_REPLY);
-}
-
-static void
-vl_api_delete_vhost_user_if_t_handler (vl_api_delete_vhost_user_if_t * mp)
-{
- int rv = 0;
- vl_api_delete_vhost_user_if_reply_t *rmp;
- u32 sw_if_index = ntohl (mp->sw_if_index);
- vl_api_registration_t *reg;
-
- vnet_main_t *vnm = vnet_get_main ();
- vlib_main_t *vm = vlib_get_main ();
-
- rv = vhost_user_delete_if (vnm, vm, sw_if_index);
-
- REPLY_MACRO (VL_API_DELETE_VHOST_USER_IF_REPLY);
- if (!rv)
- {
- reg = vl_api_client_index_to_registration (mp->client_index);
- if (!reg)
- return;
-
- vnet_clear_sw_interface_tag (vnm, sw_if_index);
- }
-}
-
-static void
-send_sw_interface_vhost_user_details (vpe_api_main_t * am,
- vl_api_registration_t * reg,
- vhost_user_intf_details_t * vui,
- u32 context)
-{
- vl_api_sw_interface_vhost_user_details_t *mp;
-
- mp = vl_msg_api_alloc (sizeof (*mp));
- clib_memset (mp, 0, sizeof (*mp));
- mp->_vl_msg_id =
- ntohs (REPLY_MSG_ID_BASE + VL_API_SW_INTERFACE_VHOST_USER_DETAILS);
- mp->sw_if_index = ntohl (vui->sw_if_index);
- mp->virtio_net_hdr_sz = ntohl (vui->virtio_net_hdr_sz);
- virtio_features_encode (vui->features, (u32 *) & mp->features_first_32,
- (u32 *) & mp->features_last_32);
- mp->is_server = vui->is_server;
- mp->num_regions = ntohl (vui->num_regions);
- mp->sock_errno = ntohl (vui->sock_errno);
- mp->context = context;
-
- strncpy ((char *) mp->sock_filename,
- (char *) vui->sock_filename, ARRAY_LEN (mp->sock_filename) - 1);
- strncpy ((char *) mp->interface_name,
- (char *) vui->if_name, ARRAY_LEN (mp->interface_name) - 1);
-
- vl_api_send_msg (reg, (u8 *) mp);
-}
-
-static void
- vl_api_sw_interface_vhost_user_dump_t_handler
- (vl_api_sw_interface_vhost_user_dump_t * mp)
-{
- int rv = 0;
- vpe_api_main_t *am = &vpe_api_main;
- vnet_main_t *vnm = vnet_get_main ();
- vlib_main_t *vm = vlib_get_main ();
- vhost_user_intf_details_t *ifaces = NULL;
- vhost_user_intf_details_t *vuid = NULL;
- vl_api_registration_t *reg;
- u32 filter_sw_if_index;
-
- reg = vl_api_client_index_to_registration (mp->client_index);
- if (!reg)
- return;
-
- filter_sw_if_index = htonl (mp->sw_if_index);
- if (filter_sw_if_index != ~0)
- VALIDATE_SW_IF_INDEX (mp);
-
- rv = vhost_user_dump_ifs (vnm, vm, &ifaces);
- if (rv)
- return;
-
- vec_foreach (vuid, ifaces)
- {
- if ((filter_sw_if_index == ~0) ||
- (vuid->sw_if_index == filter_sw_if_index))
- send_sw_interface_vhost_user_details (am, reg, vuid, mp->context);
- }
- BAD_SW_IF_INDEX_LABEL;
- vec_free (ifaces);
-}
-
-#include <vnet/devices/virtio/vhost_user.api.c>
-static clib_error_t *
-vhost_user_api_hookup (vlib_main_t * vm)
-{
- api_main_t *am = vlibapi_get_main ();
- /* Mark CREATE_VHOST_USER_IF as mp safe */
- vl_api_set_msg_thread_safe (am, VL_API_CREATE_VHOST_USER_IF, 1);
- vl_api_set_msg_thread_safe (am, VL_API_CREATE_VHOST_USER_IF_V2, 1);
-
- /*
- * Set up the (msg_name, crc, message-id) table
- */
- REPLY_MSG_ID_BASE = setup_message_id_table ();
-
- return 0;
-}
-
-VLIB_API_INIT_FUNCTION (vhost_user_api_hookup);
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
diff --git a/src/vnet/devices/virtio/vhost_user_inline.h b/src/vnet/devices/virtio/vhost_user_inline.h
deleted file mode 100644
index 8bdff3733a7..00000000000
--- a/src/vnet/devices/virtio/vhost_user_inline.h
+++ /dev/null
@@ -1,496 +0,0 @@
-/*
- * Copyright (c) 2018 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-#ifndef __VIRTIO_VHOST_USER_INLINE_H__
-#define __VIRTIO_VHOST_USER_INLINE_H__
-/* vhost-user inline functions */
-#include <vppinfra/elog.h>
-
-static_always_inline void *
-map_guest_mem (vhost_user_intf_t * vui, uword addr, u32 * hint)
-{
- int i = *hint;
- if (PREDICT_TRUE ((vui->regions[i].guest_phys_addr <= addr) &&
- ((vui->regions[i].guest_phys_addr +
- vui->regions[i].memory_size) > addr)))
- {
- return (void *) (vui->region_mmap_addr[i] + addr -
- vui->regions[i].guest_phys_addr);
- }
-#if __SSE4_2__
- __m128i rl, rh, al, ah, r;
- al = _mm_set1_epi64x (addr + 1);
- ah = _mm_set1_epi64x (addr);
-
- rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[0]);
- rl = _mm_cmpgt_epi64 (al, rl);
- rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[0]);
- rh = _mm_cmpgt_epi64 (rh, ah);
- r = _mm_and_si128 (rl, rh);
-
- rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[2]);
- rl = _mm_cmpgt_epi64 (al, rl);
- rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[2]);
- rh = _mm_cmpgt_epi64 (rh, ah);
- r = _mm_blend_epi16 (r, _mm_and_si128 (rl, rh), 0x22);
-
- rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[4]);
- rl = _mm_cmpgt_epi64 (al, rl);
- rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[4]);
- rh = _mm_cmpgt_epi64 (rh, ah);
- r = _mm_blend_epi16 (r, _mm_and_si128 (rl, rh), 0x44);
-
- rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[6]);
- rl = _mm_cmpgt_epi64 (al, rl);
- rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[6]);
- rh = _mm_cmpgt_epi64 (rh, ah);
- r = _mm_blend_epi16 (r, _mm_and_si128 (rl, rh), 0x88);
-
- r = _mm_shuffle_epi8 (r, _mm_set_epi64x (0, 0x0e060c040a020800));
- i = count_trailing_zeros (_mm_movemask_epi8 (r) |
- (1 << VHOST_MEMORY_MAX_NREGIONS));
-
- if (i < vui->nregions)
- {
- *hint = i;
- return (void *) (vui->region_mmap_addr[i] + addr -
- vui->regions[i].guest_phys_addr);
- }
-#elif __aarch64__ && __ARM_NEON
- uint64x2_t al, ah, rl, rh, r;
- uint32_t u32 = 0;
-
- al = vdupq_n_u64 (addr + 1);
- ah = vdupq_n_u64 (addr);
-
- /*First Iteration */
- rl = vld1q_u64 (&vui->region_guest_addr_lo[0]);
- rl = vcgtq_u64 (al, rl);
- rh = vld1q_u64 (&vui->region_guest_addr_hi[0]);
- rh = vcgtq_u64 (rh, ah);
- r = vandq_u64 (rl, rh);
- u32 |= (vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 0) & 0x1);
- u32 |= ((vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 8) & 0x1) << 1);
-
- if (u32)
- {
- i = count_trailing_zeros (u32);
- goto vhost_map_guest_mem_done;
- }
-
- /*Second Iteration */
- rl = vld1q_u64 (&vui->region_guest_addr_lo[2]);
- rl = vcgtq_u64 (al, rl);
- rh = vld1q_u64 (&vui->region_guest_addr_hi[2]);
- rh = vcgtq_u64 (rh, ah);
- r = vandq_u64 (rl, rh);
- u32 |= ((vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 0) & 0x1) << 2);
- u32 |= ((vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 8) & 0x1) << 3);
-
- if (u32)
- {
- i = count_trailing_zeros (u32);
- goto vhost_map_guest_mem_done;
- }
-
- /*Third Iteration */
- rl = vld1q_u64 (&vui->region_guest_addr_lo[4]);
- rl = vcgtq_u64 (al, rl);
- rh = vld1q_u64 (&vui->region_guest_addr_hi[4]);
- rh = vcgtq_u64 (rh, ah);
- r = vandq_u64 (rl, rh);
- u32 |= ((vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 0) & 0x1) << 6);
- u32 |= ((vgetq_lane_u8 (vreinterpretq_u8_u64 (r), 8) & 0x1) << 7);
-
- i = count_trailing_zeros (u32 | (1 << VHOST_MEMORY_MAX_NREGIONS));
-
-vhost_map_guest_mem_done:
- if (i < vui->nregions)
- {
- *hint = i;
- return (void *) (vui->region_mmap_addr[i] + addr -
- vui->regions[i].guest_phys_addr);
- }
-#else
- for (i = 0; i < vui->nregions; i++)
- {
- if ((vui->regions[i].guest_phys_addr <= addr) &&
- ((vui->regions[i].guest_phys_addr + vui->regions[i].memory_size) >
- addr))
- {
- *hint = i;
- return (void *) (vui->region_mmap_addr[i] + addr -
- vui->regions[i].guest_phys_addr);
- }
- }
-#endif
- /* *INDENT-OFF* */
- ELOG_TYPE_DECLARE (el) =
- {
- .format = "failed to map guest mem addr %lx",
- .format_args = "i8",
- };
- /* *INDENT-ON* */
- struct
- {
- uword addr;
- } *ed;
- ed = ELOG_DATA (&vlib_global_main.elog_main, el);
- ed->addr = addr;
- *hint = 0;
- return 0;
-}
-
-static_always_inline void *
-map_user_mem (vhost_user_intf_t * vui, uword addr)
-{
- int i;
- for (i = 0; i < vui->nregions; i++)
- {
- if ((vui->regions[i].userspace_addr <= addr) &&
- ((vui->regions[i].userspace_addr + vui->regions[i].memory_size) >
- addr))
- {
- return (void *) (vui->region_mmap_addr[i] + addr -
- vui->regions[i].userspace_addr);
- }
- }
- return 0;
-}
-
-#define VHOST_LOG_PAGE 0x1000
-
-static_always_inline void
-vhost_user_log_dirty_pages_2 (vhost_user_intf_t * vui,
- u64 addr, u64 len, u8 is_host_address)
-{
- if (PREDICT_TRUE (vui->log_base_addr == 0
- || !(vui->features & VIRTIO_FEATURE (VHOST_F_LOG_ALL))))
- {
- return;
- }
- if (is_host_address)
- {
- addr = pointer_to_uword (map_user_mem (vui, (uword) addr));
- }
- if (PREDICT_FALSE ((addr + len - 1) / VHOST_LOG_PAGE / 8 >= vui->log_size))
- {
- vu_log_debug (vui, "vhost_user_log_dirty_pages(): out of range\n");
- return;
- }
-
- CLIB_MEMORY_BARRIER ();
- u64 page = addr / VHOST_LOG_PAGE;
- while (page * VHOST_LOG_PAGE < addr + len)
- {
- ((u8 *) vui->log_base_addr)[page / 8] |= 1 << page % 8;
- page++;
- }
-}
-
-#define vhost_user_log_dirty_ring(vui, vq, member) \
- if (PREDICT_FALSE (vq->log_used)) \
- { \
- vhost_user_log_dirty_pages_2 ( \
- vui, \
- vq->log_guest_addr + \
- STRUCT_OFFSET_OF (vnet_virtio_vring_used_t, member), \
- sizeof (vq->used->member), 0); \
- }
-
-static_always_inline u8 *
-format_vhost_trace (u8 * s, va_list * va)
-{
- CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
- CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
- CLIB_UNUSED (vnet_main_t * vnm) = vnet_get_main ();
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_trace_t *t = va_arg (*va, vhost_trace_t *);
- vhost_user_intf_t *vui = vum->vhost_user_interfaces + t->device_index;
- vnet_sw_interface_t *sw;
- u32 indent;
-
- if (pool_is_free (vum->vhost_user_interfaces, vui))
- {
- s = format (s, "vhost-user interface is deleted");
- return s;
- }
- sw = vnet_get_sw_interface (vnm, vui->sw_if_index);
- indent = format_get_indent (s);
- s = format (s, "%U %U queue %d\n", format_white_space, indent,
- format_vnet_sw_interface_name, vnm, sw, t->qid);
-
- s = format (s, "%U virtio flags:\n", format_white_space, indent);
-#define _(n,i,st) \
- if (t->virtio_ring_flags & (1 << VIRTIO_TRACE_F_##n)) \
- s = format (s, "%U %s %s\n", format_white_space, indent, #n, st);
- foreach_virtio_trace_flags
-#undef _
- s = format (s, "%U virtio_net_hdr first_desc_len %u\n",
- format_white_space, indent, t->first_desc_len);
-
- s = format (s, "%U flags 0x%02x gso_type %u\n",
- format_white_space, indent,
- t->hdr.hdr.flags, t->hdr.hdr.gso_type);
-
- if (vui->virtio_net_hdr_sz == 12)
- s = format (s, "%U num_buff %u",
- format_white_space, indent, t->hdr.num_buffers);
-
- return s;
-}
-
-static_always_inline u64
-vhost_user_is_packed_ring_supported (vhost_user_intf_t * vui)
-{
- return (vui->features & VIRTIO_FEATURE (VIRTIO_F_RING_PACKED));
-}
-
-static_always_inline u64
-vhost_user_is_event_idx_supported (vhost_user_intf_t * vui)
-{
- return (vui->features & VIRTIO_FEATURE (VIRTIO_RING_F_EVENT_IDX));
-}
-
-static_always_inline void
-vhost_user_kick (vlib_main_t * vm, vhost_user_vring_t * vq)
-{
- vhost_user_main_t *vum = &vhost_user_main;
- u64 x = 1;
- int fd = UNIX_GET_FD (vq->callfd_idx);
- int rv;
-
- rv = write (fd, &x, sizeof (x));
- if (PREDICT_FALSE (rv <= 0))
- {
- clib_unix_warning
- ("Error: Could not write to unix socket for callfd %d", fd);
- return;
- }
-
- vq->n_since_last_int = 0;
- vq->int_deadline = vlib_time_now (vm) + vum->coalesce_time;
-}
-
-static_always_inline u16
-vhost_user_avail_event_idx (vhost_user_vring_t * vq)
-{
- volatile u16 *event_idx = (u16 *) & (vq->used->ring[vq->qsz_mask + 1]);
-
- return *event_idx;
-}
-
-static_always_inline u16
-vhost_user_used_event_idx (vhost_user_vring_t * vq)
-{
- volatile u16 *event_idx = (u16 *) & (vq->avail->ring[vq->qsz_mask + 1]);
-
- return *event_idx;
-}
-
-static_always_inline u16
-vhost_user_need_event (u16 event_idx, u16 new_idx, u16 old_idx)
-{
- return ((u16) (new_idx - event_idx - 1) < (u16) (new_idx - old_idx));
-}
-
-static_always_inline void
-vhost_user_send_call_event_idx (vlib_main_t * vm, vhost_user_vring_t * vq)
-{
- vhost_user_main_t *vum = &vhost_user_main;
- u8 first_kick = vq->first_kick;
- u16 event_idx = vhost_user_used_event_idx (vq);
-
- vq->first_kick = 1;
- if (vhost_user_need_event (event_idx, vq->last_used_idx, vq->last_kick) ||
- PREDICT_FALSE (!first_kick))
- {
- vhost_user_kick (vm, vq);
- vq->last_kick = event_idx;
- }
- else
- {
- vq->n_since_last_int = 0;
- vq->int_deadline = vlib_time_now (vm) + vum->coalesce_time;
- }
-}
-
-static_always_inline void
-vhost_user_send_call_event_idx_packed (vlib_main_t * vm,
- vhost_user_vring_t * vq)
-{
- vhost_user_main_t *vum = &vhost_user_main;
- u8 first_kick = vq->first_kick;
- u16 off_wrap;
- u16 event_idx;
- u16 new_idx = vq->last_used_idx;
- u16 old_idx = vq->last_kick;
-
- if (PREDICT_TRUE (vq->avail_event->flags == VRING_EVENT_F_DESC))
- {
- CLIB_COMPILER_BARRIER ();
- off_wrap = vq->avail_event->off_wrap;
- event_idx = off_wrap & 0x7fff;
- if (vq->used_wrap_counter != (off_wrap >> 15))
- event_idx -= (vq->qsz_mask + 1);
-
- if (new_idx <= old_idx)
- old_idx -= (vq->qsz_mask + 1);
-
- vq->first_kick = 1;
- vq->last_kick = event_idx;
- if (vhost_user_need_event (event_idx, new_idx, old_idx) ||
- PREDICT_FALSE (!first_kick))
- vhost_user_kick (vm, vq);
- else
- {
- vq->n_since_last_int = 0;
- vq->int_deadline = vlib_time_now (vm) + vum->coalesce_time;
- }
- }
- else
- vhost_user_kick (vm, vq);
-}
-
-static_always_inline void
-vhost_user_send_call (vlib_main_t * vm, vhost_user_intf_t * vui,
- vhost_user_vring_t * vq)
-{
- if (vhost_user_is_event_idx_supported (vui))
- {
- if (vhost_user_is_packed_ring_supported (vui))
- vhost_user_send_call_event_idx_packed (vm, vq);
- else
- vhost_user_send_call_event_idx (vm, vq);
- }
- else
- vhost_user_kick (vm, vq);
-}
-
-static_always_inline u8
-vui_is_link_up (vhost_user_intf_t * vui)
-{
- return vui->admin_up && vui->is_ready;
-}
-
-static_always_inline void
-vhost_user_update_gso_interface_count (vhost_user_intf_t * vui, u8 add)
-{
- vhost_user_main_t *vum = &vhost_user_main;
-
- if (vui->enable_gso)
- {
- if (add)
- {
- vum->gso_count++;
- }
- else
- {
- ASSERT (vum->gso_count > 0);
- vum->gso_count--;
- }
- }
-}
-
-static_always_inline u8
-vhost_user_packed_desc_available (vhost_user_vring_t * vring, u16 idx)
-{
- return (((vring->packed_desc[idx].flags & VRING_DESC_F_AVAIL) ==
- vring->avail_wrap_counter));
-}
-
-static_always_inline void
-vhost_user_advance_last_avail_idx (vhost_user_vring_t * vring)
-{
- vring->last_avail_idx++;
- if (PREDICT_FALSE ((vring->last_avail_idx & vring->qsz_mask) == 0))
- {
- vring->avail_wrap_counter ^= VRING_DESC_F_AVAIL;
- vring->last_avail_idx = 0;
- }
-}
-
-static_always_inline void
-vhost_user_advance_last_avail_table_idx (vhost_user_intf_t * vui,
- vhost_user_vring_t * vring,
- u8 chained)
-{
- if (chained)
- {
- vnet_virtio_vring_packed_desc_t *desc_table = vring->packed_desc;
-
- /* pick up the slot of the next avail idx */
- while (desc_table[vring->last_avail_idx & vring->qsz_mask].flags &
- VRING_DESC_F_NEXT)
- vhost_user_advance_last_avail_idx (vring);
- }
-
- vhost_user_advance_last_avail_idx (vring);
-}
-
-static_always_inline void
-vhost_user_undo_advanced_last_avail_idx (vhost_user_vring_t * vring)
-{
- if (PREDICT_FALSE ((vring->last_avail_idx & vring->qsz_mask) == 0))
- vring->avail_wrap_counter ^= VRING_DESC_F_AVAIL;
-
- if (PREDICT_FALSE (vring->last_avail_idx == 0))
- vring->last_avail_idx = vring->qsz_mask;
- else
- vring->last_avail_idx--;
-}
-
-static_always_inline void
-vhost_user_dequeue_descs (vhost_user_vring_t *rxvq,
- vnet_virtio_net_hdr_mrg_rxbuf_t *hdr,
- u16 *n_descs_processed)
-{
- u16 i;
-
- *n_descs_processed -= (hdr->num_buffers - 1);
- for (i = 0; i < hdr->num_buffers - 1; i++)
- vhost_user_undo_advanced_last_avail_idx (rxvq);
-}
-
-static_always_inline void
-vhost_user_dequeue_chained_descs (vhost_user_vring_t * rxvq,
- u16 * n_descs_processed)
-{
- while (*n_descs_processed)
- {
- vhost_user_undo_advanced_last_avail_idx (rxvq);
- (*n_descs_processed)--;
- }
-}
-
-static_always_inline void
-vhost_user_advance_last_used_idx (vhost_user_vring_t * vring)
-{
- vring->last_used_idx++;
- if (PREDICT_FALSE ((vring->last_used_idx & vring->qsz_mask) == 0))
- {
- vring->used_wrap_counter ^= 1;
- vring->last_used_idx = 0;
- }
-}
-
-#endif
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
diff --git a/src/vnet/devices/virtio/vhost_user_input.c b/src/vnet/devices/virtio/vhost_user_input.c
deleted file mode 100644
index 841a9798212..00000000000
--- a/src/vnet/devices/virtio/vhost_user_input.c
+++ /dev/null
@@ -1,1474 +0,0 @@
-/*
- *------------------------------------------------------------------
- * vhost-user-input
- *
- * Copyright (c) 2014-2018 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *------------------------------------------------------------------
- */
-
-#include <fcntl.h> /* for open */
-#include <sys/ioctl.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/uio.h> /* for iovec */
-#include <netinet/in.h>
-#include <sys/vfs.h>
-
-#include <linux/if_arp.h>
-#include <linux/if_tun.h>
-
-#include <vlib/vlib.h>
-#include <vlib/unix/unix.h>
-
-#include <vnet/ethernet/ethernet.h>
-#include <vnet/devices/devices.h>
-#include <vnet/feature/feature.h>
-#include <vnet/udp/udp_packet.h>
-#include <vnet/tcp/tcp_packet.h>
-#include <vnet/interface/rx_queue_funcs.h>
-
-#include <vnet/devices/virtio/vhost_user.h>
-#include <vnet/devices/virtio/vhost_user_inline.h>
-
-#include <vnet/ip/ip4_packet.h>
-#include <vnet/ip/ip6_packet.h>
-
-/*
- * When an RX queue is down but active, received packets
- * must be discarded. This value controls up to how many
- * packets will be discarded during each round.
- */
-#define VHOST_USER_DOWN_DISCARD_COUNT 256
-
-/*
- * When the number of available buffers gets under this threshold,
- * RX node will start discarding packets.
- */
-#define VHOST_USER_RX_BUFFER_STARVATION 32
-
-/*
- * On the receive side, the host should free descriptors as soon
- * as possible in order to avoid TX drop in the VM.
- * This value controls the number of copy operations that are stacked
- * before copy is done for all and descriptors are given back to
- * the guest.
- * The value 64 was obtained by testing (48 and 128 were not as good).
- */
-#define VHOST_USER_RX_COPY_THRESHOLD 64
-
-extern vlib_node_registration_t vhost_user_input_node;
-
-#define foreach_vhost_user_input_func_error \
- _(NO_ERROR, "no error") \
- _(NO_BUFFER, "no available buffer") \
- _(MMAP_FAIL, "mmap failure") \
- _(INDIRECT_OVERFLOW, "indirect descriptor overflows table") \
- _(UNDERSIZED_FRAME, "undersized ethernet frame received (< 14 bytes)") \
- _(NOT_READY, "vhost interface not ready or down") \
- _(FULL_RX_QUEUE, "full rx queue (possible driver tx drop)")
-
-typedef enum
-{
-#define _(f,s) VHOST_USER_INPUT_FUNC_ERROR_##f,
- foreach_vhost_user_input_func_error
-#undef _
- VHOST_USER_INPUT_FUNC_N_ERROR,
-} vhost_user_input_func_error_t;
-
-static __clib_unused char *vhost_user_input_func_error_strings[] = {
-#define _(n,s) s,
- foreach_vhost_user_input_func_error
-#undef _
-};
-
-static_always_inline void
-vhost_user_rx_trace (vhost_trace_t * t,
- vhost_user_intf_t * vui, u16 qid,
- vlib_buffer_t * b, vhost_user_vring_t * txvq,
- u16 last_avail_idx)
-{
- vhost_user_main_t *vum = &vhost_user_main;
- u32 desc_current = txvq->avail->ring[last_avail_idx & txvq->qsz_mask];
- vnet_virtio_vring_desc_t *hdr_desc = 0;
- vnet_virtio_net_hdr_mrg_rxbuf_t *hdr;
- u32 hint = 0;
-
- clib_memset (t, 0, sizeof (*t));
- t->device_index = vui - vum->vhost_user_interfaces;
- t->qid = qid;
-
- hdr_desc = &txvq->desc[desc_current];
- if (txvq->desc[desc_current].flags & VRING_DESC_F_INDIRECT)
- {
- t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_INDIRECT;
- /* Header is the first here */
- hdr_desc = map_guest_mem (vui, txvq->desc[desc_current].addr, &hint);
- }
- if (txvq->desc[desc_current].flags & VRING_DESC_F_NEXT)
- {
- t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SIMPLE_CHAINED;
- }
- if (!(txvq->desc[desc_current].flags & VRING_DESC_F_NEXT) &&
- !(txvq->desc[desc_current].flags & VRING_DESC_F_INDIRECT))
- {
- t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SINGLE_DESC;
- }
-
- t->first_desc_len = hdr_desc ? hdr_desc->len : 0;
-
- if (!hdr_desc || !(hdr = map_guest_mem (vui, hdr_desc->addr, &hint)))
- {
- t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_MAP_ERROR;
- }
- else
- {
- u32 len = vui->virtio_net_hdr_sz;
- memcpy (&t->hdr, hdr, len > hdr_desc->len ? hdr_desc->len : len);
- }
-}
-
-static_always_inline u32
-vhost_user_input_copy (vhost_user_intf_t * vui, vhost_copy_t * cpy,
- u16 copy_len, u32 * map_hint)
-{
- void *src0, *src1, *src2, *src3;
- if (PREDICT_TRUE (copy_len >= 4))
- {
- if (PREDICT_FALSE (!(src2 = map_guest_mem (vui, cpy[0].src, map_hint))))
- return 1;
- if (PREDICT_FALSE (!(src3 = map_guest_mem (vui, cpy[1].src, map_hint))))
- return 1;
-
- while (PREDICT_TRUE (copy_len >= 4))
- {
- src0 = src2;
- src1 = src3;
-
- if (PREDICT_FALSE
- (!(src2 = map_guest_mem (vui, cpy[2].src, map_hint))))
- return 1;
- if (PREDICT_FALSE
- (!(src3 = map_guest_mem (vui, cpy[3].src, map_hint))))
- return 1;
-
- clib_prefetch_load (src2);
- clib_prefetch_load (src3);
-
- clib_memcpy_fast ((void *) cpy[0].dst, src0, cpy[0].len);
- clib_memcpy_fast ((void *) cpy[1].dst, src1, cpy[1].len);
- copy_len -= 2;
- cpy += 2;
- }
- }
- while (copy_len)
- {
- if (PREDICT_FALSE (!(src0 = map_guest_mem (vui, cpy->src, map_hint))))
- return 1;
- clib_memcpy_fast ((void *) cpy->dst, src0, cpy->len);
- copy_len -= 1;
- cpy += 1;
- }
- return 0;
-}
-
-/**
- * Try to discard packets from the tx ring (VPP RX path).
- * Returns the number of discarded packets.
- */
-static_always_inline u32
-vhost_user_rx_discard_packet (vlib_main_t * vm,
- vhost_user_intf_t * vui,
- vhost_user_vring_t * txvq, u32 discard_max)
-{
- /*
- * On the RX side, each packet corresponds to one descriptor
- * (it is the same whether it is a shallow descriptor, chained, or indirect).
- * Therefore, discarding a packet is like discarding a descriptor.
- */
- u32 discarded_packets = 0;
- u32 avail_idx = txvq->avail->idx;
- u16 mask = txvq->qsz_mask;
- u16 last_avail_idx = txvq->last_avail_idx;
- u16 last_used_idx = txvq->last_used_idx;
- while (discarded_packets != discard_max)
- {
- if (avail_idx == last_avail_idx)
- goto out;
-
- u16 desc_chain_head = txvq->avail->ring[last_avail_idx & mask];
- last_avail_idx++;
- txvq->used->ring[last_used_idx & mask].id = desc_chain_head;
- txvq->used->ring[last_used_idx & mask].len = 0;
- vhost_user_log_dirty_ring (vui, txvq, ring[last_used_idx & mask]);
- last_used_idx++;
- discarded_packets++;
- }
-
-out:
- txvq->last_avail_idx = last_avail_idx;
- txvq->last_used_idx = last_used_idx;
- CLIB_MEMORY_STORE_BARRIER ();
- txvq->used->idx = txvq->last_used_idx;
- vhost_user_log_dirty_ring (vui, txvq, idx);
- return discarded_packets;
-}
-
-/*
- * In case of overflow, we need to rewind the array of allocated buffers.
- */
-static_always_inline void
-vhost_user_input_rewind_buffers (vlib_main_t * vm,
- vhost_cpu_t * cpu, vlib_buffer_t * b_head)
-{
- u32 bi_current = cpu->rx_buffers[cpu->rx_buffers_len];
- vlib_buffer_t *b_current = vlib_get_buffer (vm, bi_current);
- b_current->current_length = 0;
- b_current->flags = 0;
- while (b_current != b_head)
- {
- cpu->rx_buffers_len++;
- bi_current = cpu->rx_buffers[cpu->rx_buffers_len];
- b_current = vlib_get_buffer (vm, bi_current);
- b_current->current_length = 0;
- b_current->flags = 0;
- }
- cpu->rx_buffers_len++;
-}
-
-static_always_inline void
-vhost_user_handle_rx_offload (vlib_buffer_t *b0, u8 *b0_data,
- vnet_virtio_net_hdr_t *hdr)
-{
- u8 l4_hdr_sz = 0;
- u8 l4_proto = 0;
- ethernet_header_t *eh = (ethernet_header_t *) b0_data;
- u16 ethertype = clib_net_to_host_u16 (eh->type);
- u16 l2hdr_sz = sizeof (ethernet_header_t);
- vnet_buffer_oflags_t oflags = 0;
-
- if (ethernet_frame_is_tagged (ethertype))
- {
- ethernet_vlan_header_t *vlan = (ethernet_vlan_header_t *) (eh + 1);
-
- ethertype = clib_net_to_host_u16 (vlan->type);
- l2hdr_sz += sizeof (*vlan);
- if (ethertype == ETHERNET_TYPE_VLAN)
- {
- vlan++;
- ethertype = clib_net_to_host_u16 (vlan->type);
- l2hdr_sz += sizeof (*vlan);
- }
- }
- vnet_buffer (b0)->l2_hdr_offset = 0;
- vnet_buffer (b0)->l3_hdr_offset = l2hdr_sz;
- vnet_buffer (b0)->l4_hdr_offset = hdr->csum_start;
- b0->flags |= (VNET_BUFFER_F_L2_HDR_OFFSET_VALID |
- VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
- VNET_BUFFER_F_L4_HDR_OFFSET_VALID);
-
- if (PREDICT_TRUE (ethertype == ETHERNET_TYPE_IP4))
- {
- ip4_header_t *ip4 = (ip4_header_t *) (b0_data + l2hdr_sz);
- l4_proto = ip4->protocol;
- b0->flags |= VNET_BUFFER_F_IS_IP4;
- oflags |= VNET_BUFFER_OFFLOAD_F_IP_CKSUM;
- }
- else if (PREDICT_TRUE (ethertype == ETHERNET_TYPE_IP6))
- {
- ip6_header_t *ip6 = (ip6_header_t *) (b0_data + l2hdr_sz);
- l4_proto = ip6->protocol;
- b0->flags |= VNET_BUFFER_F_IS_IP6;
- }
-
- if (l4_proto == IP_PROTOCOL_TCP)
- {
- tcp_header_t *tcp = (tcp_header_t *)
- (b0_data + vnet_buffer (b0)->l4_hdr_offset);
- l4_hdr_sz = tcp_header_bytes (tcp);
- oflags |= VNET_BUFFER_OFFLOAD_F_TCP_CKSUM;
- }
- else if (l4_proto == IP_PROTOCOL_UDP)
- {
- l4_hdr_sz = sizeof (udp_header_t);
- oflags |= VNET_BUFFER_OFFLOAD_F_UDP_CKSUM;
- }
-
- if (hdr->gso_type == VIRTIO_NET_HDR_GSO_UDP)
- {
- vnet_buffer2 (b0)->gso_size = hdr->gso_size;
- vnet_buffer2 (b0)->gso_l4_hdr_sz = l4_hdr_sz;
- b0->flags |= VNET_BUFFER_F_GSO;
- }
- else if (hdr->gso_type == VIRTIO_NET_HDR_GSO_TCPV4)
- {
- vnet_buffer2 (b0)->gso_size = hdr->gso_size;
- vnet_buffer2 (b0)->gso_l4_hdr_sz = l4_hdr_sz;
- b0->flags |= (VNET_BUFFER_F_GSO | VNET_BUFFER_F_IS_IP4);
- }
- else if (hdr->gso_type == VIRTIO_NET_HDR_GSO_TCPV6)
- {
- vnet_buffer2 (b0)->gso_size = hdr->gso_size;
- vnet_buffer2 (b0)->gso_l4_hdr_sz = l4_hdr_sz;
- b0->flags |= (VNET_BUFFER_F_GSO | VNET_BUFFER_F_IS_IP6);
- }
-
- if (oflags)
- vnet_buffer_offload_flags_set (b0, oflags);
-}
-
-static_always_inline void
-vhost_user_input_do_interrupt (vlib_main_t * vm, vhost_user_intf_t * vui,
- vhost_user_vring_t * txvq,
- vhost_user_vring_t * rxvq)
-{
- f64 now = vlib_time_now (vm);
-
- if ((txvq->n_since_last_int) && (txvq->int_deadline < now))
- vhost_user_send_call (vm, vui, txvq);
-
- if ((rxvq->n_since_last_int) && (rxvq->int_deadline < now))
- vhost_user_send_call (vm, vui, rxvq);
-}
-
-static_always_inline void
-vhost_user_input_setup_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
- vhost_user_intf_t * vui,
- u32 * current_config_index, u32 * next_index,
- u32 ** to_next, u32 * n_left_to_next)
-{
- vnet_feature_main_t *fm = &feature_main;
- u8 feature_arc_idx = fm->device_input_feature_arc_index;
-
- if (PREDICT_FALSE (vnet_have_features (feature_arc_idx, vui->sw_if_index)))
- {
- vnet_feature_config_main_t *cm;
- cm = &fm->feature_config_mains[feature_arc_idx];
- *current_config_index = vec_elt (cm->config_index_by_sw_if_index,
- vui->sw_if_index);
- vnet_get_config_data (&cm->config_main, current_config_index,
- next_index, 0);
- }
-
- vlib_get_new_next_frame (vm, node, *next_index, *to_next, *n_left_to_next);
-
- if (*next_index == VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT)
- {
- /* give some hints to ethernet-input */
- vlib_next_frame_t *nf;
- vlib_frame_t *f;
- ethernet_input_frame_t *ef;
- nf = vlib_node_runtime_get_next_frame (vm, node, *next_index);
- f = vlib_get_frame (vm, nf->frame);
- f->flags = ETH_INPUT_FRAME_F_SINGLE_SW_IF_IDX;
-
- ef = vlib_frame_scalar_args (f);
- ef->sw_if_index = vui->sw_if_index;
- ef->hw_if_index = vui->hw_if_index;
- vlib_frame_no_append (f);
- }
-}
-
-static_always_inline u32
-vhost_user_if_input (vlib_main_t *vm, vhost_user_main_t *vum,
- vhost_user_intf_t *vui, u16 qid,
- vlib_node_runtime_t *node, u8 enable_csum)
-{
- vhost_user_vring_t *txvq = &vui->vrings[VHOST_VRING_IDX_TX (qid)];
- vnet_feature_main_t *fm = &feature_main;
- u16 n_rx_packets = 0;
- u32 n_rx_bytes = 0;
- u16 n_left;
- u32 n_left_to_next, *to_next;
- u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
- u32 n_trace = vlib_get_trace_count (vm, node);
- u32 buffer_data_size = vlib_buffer_get_default_data_size (vm);
- u32 map_hint = 0;
- vhost_cpu_t *cpu = &vum->cpus[vm->thread_index];
- u16 copy_len = 0;
- u8 feature_arc_idx = fm->device_input_feature_arc_index;
- u32 current_config_index = ~(u32) 0;
- u16 mask = txvq->qsz_mask;
-
- /* The descriptor table is not ready yet */
- if (PREDICT_FALSE (txvq->avail == 0))
- goto done;
-
- {
- /* do we have pending interrupts ? */
- vhost_user_vring_t *rxvq = &vui->vrings[VHOST_VRING_IDX_RX (qid)];
- vhost_user_input_do_interrupt (vm, vui, txvq, rxvq);
- }
-
- /*
- * For adaptive mode, it is optimized to reduce interrupts.
- * If the scheduler switches the input node to polling due
- * to burst of traffic, we tell the driver no interrupt.
- * When the traffic subsides, the scheduler switches the node back to
- * interrupt mode. We must tell the driver we want interrupt.
- */
- if (PREDICT_FALSE (txvq->mode == VNET_HW_IF_RX_MODE_ADAPTIVE))
- {
- if ((node->flags &
- VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE) ||
- !(node->flags &
- VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE))
- /* Tell driver we want notification */
- txvq->used->flags = 0;
- else
- /* Tell driver we don't want notification */
- txvq->used->flags = VRING_USED_F_NO_NOTIFY;
- }
-
- if (PREDICT_FALSE (txvq->avail->flags & 0xFFFE))
- goto done;
-
- n_left = (u16) (txvq->avail->idx - txvq->last_avail_idx);
-
- /* nothing to do */
- if (PREDICT_FALSE (n_left == 0))
- goto done;
-
- if (PREDICT_FALSE (!vui->admin_up || !(txvq->enabled)))
- {
- /*
- * Discard input packet if interface is admin down or vring is not
- * enabled.
- * "For example, for a networking device, in the disabled state
- * client must not supply any new RX packets, but must process
- * and discard any TX packets."
- */
- vhost_user_rx_discard_packet (vm, vui, txvq,
- VHOST_USER_DOWN_DISCARD_COUNT);
- goto done;
- }
-
- if (PREDICT_FALSE (n_left == (mask + 1)))
- {
- /*
- * Informational error logging when VPP is not
- * receiving packets fast enough.
- */
- vlib_error_count (vm, node->node_index,
- VHOST_USER_INPUT_FUNC_ERROR_FULL_RX_QUEUE, 1);
- }
-
- if (n_left > VLIB_FRAME_SIZE)
- n_left = VLIB_FRAME_SIZE;
-
- /*
- * For small packets (<2kB), we will not need more than one vlib buffer
- * per packet. In case packets are bigger, we will just yield at some point
- * in the loop and come back later. This is not an issue as for big packet,
- * processing cost really comes from the memory copy.
- * The assumption is that big packets will fit in 40 buffers.
- */
- if (PREDICT_FALSE (cpu->rx_buffers_len < n_left + 1 ||
- cpu->rx_buffers_len < 40))
- {
- u32 curr_len = cpu->rx_buffers_len;
- cpu->rx_buffers_len +=
- vlib_buffer_alloc (vm, cpu->rx_buffers + curr_len,
- VHOST_USER_RX_BUFFERS_N - curr_len);
-
- if (PREDICT_FALSE
- (cpu->rx_buffers_len < VHOST_USER_RX_BUFFER_STARVATION))
- {
- /* In case of buffer starvation, discard some packets from the queue
- * and log the event.
- * We keep doing best effort for the remaining packets. */
- u32 flush = (n_left + 1 > cpu->rx_buffers_len) ?
- n_left + 1 - cpu->rx_buffers_len : 1;
- flush = vhost_user_rx_discard_packet (vm, vui, txvq, flush);
-
- n_left -= flush;
- vlib_increment_simple_counter (vnet_main.
- interface_main.sw_if_counters +
- VNET_INTERFACE_COUNTER_DROP,
- vm->thread_index, vui->sw_if_index,
- flush);
-
- vlib_error_count (vm, vhost_user_input_node.index,
- VHOST_USER_INPUT_FUNC_ERROR_NO_BUFFER, flush);
- }
- }
-
- vhost_user_input_setup_frame (vm, node, vui, &current_config_index,
- &next_index, &to_next, &n_left_to_next);
-
- u16 last_avail_idx = txvq->last_avail_idx;
- u16 last_used_idx = txvq->last_used_idx;
-
- while (n_left > 0)
- {
- vlib_buffer_t *b_head, *b_current;
- u32 bi_current;
- u16 desc_current;
- u32 desc_data_offset;
- vnet_virtio_vring_desc_t *desc_table = txvq->desc;
-
- if (PREDICT_FALSE (cpu->rx_buffers_len <= 1))
- {
- /* Not enough rx_buffers
- * Note: We yeld on 1 so we don't need to do an additional
- * check for the next buffer prefetch.
- */
- n_left = 0;
- break;
- }
-
- desc_current = txvq->avail->ring[last_avail_idx & mask];
- cpu->rx_buffers_len--;
- bi_current = cpu->rx_buffers[cpu->rx_buffers_len];
- b_head = b_current = vlib_get_buffer (vm, bi_current);
- to_next[0] = bi_current; //We do that now so we can forget about bi_current
- to_next++;
- n_left_to_next--;
-
- vlib_prefetch_buffer_with_index
- (vm, cpu->rx_buffers[cpu->rx_buffers_len - 1], LOAD);
-
- /* Just preset the used descriptor id and length for later */
- txvq->used->ring[last_used_idx & mask].id = desc_current;
- txvq->used->ring[last_used_idx & mask].len = 0;
- vhost_user_log_dirty_ring (vui, txvq, ring[last_used_idx & mask]);
-
- /* The buffer should already be initialized */
- b_head->total_length_not_including_first_buffer = 0;
- b_head->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
-
- if (PREDICT_FALSE
- (n_trace > 0 && vlib_trace_buffer (vm, node, next_index, b_head,
- /* follow_chain */ 0)))
- {
- vhost_trace_t *t0 =
- vlib_add_trace (vm, node, b_head, sizeof (t0[0]));
- vhost_user_rx_trace (t0, vui, qid, b_head, txvq, last_avail_idx);
- n_trace--;
- vlib_set_trace_count (vm, node, n_trace);
- }
-
- /* This depends on the setup but is very consistent
- * So I think the CPU branch predictor will make a pretty good job
- * at optimizing the decision. */
- if (txvq->desc[desc_current].flags & VRING_DESC_F_INDIRECT)
- {
- desc_table = map_guest_mem (vui, txvq->desc[desc_current].addr,
- &map_hint);
- desc_current = 0;
- if (PREDICT_FALSE (desc_table == 0))
- {
- vlib_error_count (vm, node->node_index,
- VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL, 1);
- goto out;
- }
- }
-
- desc_data_offset = vui->virtio_net_hdr_sz;
-
- if (enable_csum)
- {
- vnet_virtio_net_hdr_mrg_rxbuf_t *hdr;
- u8 *b_data;
- u16 current;
-
- hdr = map_guest_mem (vui, desc_table[desc_current].addr, &map_hint);
- if (PREDICT_FALSE (hdr == 0))
- {
- vlib_error_count (vm, node->node_index,
- VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL, 1);
- goto out;
- }
- if (hdr->hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM)
- {
- if ((desc_data_offset == desc_table[desc_current].len) &&
- (desc_table[desc_current].flags & VRING_DESC_F_NEXT))
- {
- current = desc_table[desc_current].next;
- b_data = map_guest_mem (vui, desc_table[current].addr,
- &map_hint);
- if (PREDICT_FALSE (b_data == 0))
- {
- vlib_error_count (vm, node->node_index,
- VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL,
- 1);
- goto out;
- }
- }
- else
- b_data = (u8 *) hdr + desc_data_offset;
-
- vhost_user_handle_rx_offload (b_head, b_data, &hdr->hdr);
- }
- }
-
- while (1)
- {
- /* Get more input if necessary. Or end of packet. */
- if (desc_data_offset == desc_table[desc_current].len)
- {
- if (PREDICT_FALSE (desc_table[desc_current].flags &
- VRING_DESC_F_NEXT))
- {
- desc_current = desc_table[desc_current].next;
- desc_data_offset = 0;
- }
- else
- {
- goto out;
- }
- }
-
- /* Get more output if necessary. Or end of packet. */
- if (PREDICT_FALSE (b_current->current_length == buffer_data_size))
- {
- if (PREDICT_FALSE (cpu->rx_buffers_len == 0))
- {
- /* Cancel speculation */
- to_next--;
- n_left_to_next++;
-
- /*
- * Checking if there are some left buffers.
- * If not, just rewind the used buffers and stop.
- * Note: Scheduled copies are not cancelled. This is
- * not an issue as they would still be valid. Useless,
- * but valid.
- */
- vhost_user_input_rewind_buffers (vm, cpu, b_head);
- n_left = 0;
- goto stop;
- }
-
- /* Get next output */
- cpu->rx_buffers_len--;
- u32 bi_next = cpu->rx_buffers[cpu->rx_buffers_len];
- b_current->next_buffer = bi_next;
- b_current->flags |= VLIB_BUFFER_NEXT_PRESENT;
- bi_current = bi_next;
- b_current = vlib_get_buffer (vm, bi_current);
- }
-
- /* Prepare a copy order executed later for the data */
- ASSERT (copy_len < VHOST_USER_COPY_ARRAY_N);
- vhost_copy_t *cpy = &cpu->copy[copy_len];
- copy_len++;
- u32 desc_data_l = desc_table[desc_current].len - desc_data_offset;
- cpy->len = buffer_data_size - b_current->current_length;
- cpy->len = (cpy->len > desc_data_l) ? desc_data_l : cpy->len;
- cpy->dst = (uword) (vlib_buffer_get_current (b_current) +
- b_current->current_length);
- cpy->src = desc_table[desc_current].addr + desc_data_offset;
-
- desc_data_offset += cpy->len;
-
- b_current->current_length += cpy->len;
- b_head->total_length_not_including_first_buffer += cpy->len;
- }
-
- out:
-
- n_rx_bytes += b_head->total_length_not_including_first_buffer;
- n_rx_packets++;
-
- b_head->total_length_not_including_first_buffer -=
- b_head->current_length;
-
- /* consume the descriptor and return it as used */
- last_avail_idx++;
- last_used_idx++;
-
- vnet_buffer (b_head)->sw_if_index[VLIB_RX] = vui->sw_if_index;
- vnet_buffer (b_head)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- b_head->error = 0;
-
- if (current_config_index != ~(u32) 0)
- {
- b_head->current_config_index = current_config_index;
- vnet_buffer (b_head)->feature_arc_index = feature_arc_idx;
- }
-
- n_left--;
-
- /*
- * Although separating memory copies from virtio ring parsing
- * is beneficial, we can offer to perform the copies from time
- * to time in order to free some space in the ring.
- */
- if (PREDICT_FALSE (copy_len >= VHOST_USER_RX_COPY_THRESHOLD))
- {
- if (PREDICT_FALSE (vhost_user_input_copy (vui, cpu->copy,
- copy_len, &map_hint)))
- {
- vlib_error_count (vm, node->node_index,
- VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL, 1);
- }
- copy_len = 0;
-
- /* give buffers back to driver */
- CLIB_MEMORY_STORE_BARRIER ();
- txvq->used->idx = last_used_idx;
- vhost_user_log_dirty_ring (vui, txvq, idx);
- }
- }
-stop:
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
-
- txvq->last_used_idx = last_used_idx;
- txvq->last_avail_idx = last_avail_idx;
-
- /* Do the memory copies */
- if (PREDICT_FALSE (vhost_user_input_copy (vui, cpu->copy, copy_len,
- &map_hint)))
- {
- vlib_error_count (vm, node->node_index,
- VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL, 1);
- }
-
- /* give buffers back to driver */
- CLIB_MEMORY_STORE_BARRIER ();
- txvq->used->idx = txvq->last_used_idx;
- vhost_user_log_dirty_ring (vui, txvq, idx);
-
- /* interrupt (call) handling */
- if ((txvq->callfd_idx != ~0) &&
- !(txvq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
- {
- txvq->n_since_last_int += n_rx_packets;
-
- if (txvq->n_since_last_int > vum->coalesce_frames)
- vhost_user_send_call (vm, vui, txvq);
- }
-
- /* increase rx counters */
- vlib_increment_combined_counter
- (vnet_main.interface_main.combined_sw_if_counters
- + VNET_INTERFACE_COUNTER_RX, vm->thread_index, vui->sw_if_index,
- n_rx_packets, n_rx_bytes);
-
- vnet_device_increment_rx_packets (vm->thread_index, n_rx_packets);
-
-done:
- return n_rx_packets;
-}
-
-static_always_inline void
-vhost_user_mark_desc_consumed (vhost_user_intf_t * vui,
- vhost_user_vring_t * txvq, u16 desc_head,
- u16 n_descs_processed)
-{
- vnet_virtio_vring_packed_desc_t *desc_table = txvq->packed_desc;
- u16 desc_idx;
- u16 mask = txvq->qsz_mask;
-
- for (desc_idx = 0; desc_idx < n_descs_processed; desc_idx++)
- {
- if (txvq->used_wrap_counter)
- desc_table[(desc_head + desc_idx) & mask].flags |=
- (VRING_DESC_F_AVAIL | VRING_DESC_F_USED);
- else
- desc_table[(desc_head + desc_idx) & mask].flags &=
- ~(VRING_DESC_F_AVAIL | VRING_DESC_F_USED);
- vhost_user_advance_last_used_idx (txvq);
- }
-}
-
-static_always_inline void
-vhost_user_rx_trace_packed (vhost_trace_t * t, vhost_user_intf_t * vui,
- u16 qid, vhost_user_vring_t * txvq,
- u16 desc_current)
-{
- vhost_user_main_t *vum = &vhost_user_main;
- vnet_virtio_vring_packed_desc_t *hdr_desc;
- vnet_virtio_net_hdr_mrg_rxbuf_t *hdr;
- u32 hint = 0;
-
- clib_memset (t, 0, sizeof (*t));
- t->device_index = vui - vum->vhost_user_interfaces;
- t->qid = qid;
-
- hdr_desc = &txvq->packed_desc[desc_current];
- if (txvq->packed_desc[desc_current].flags & VRING_DESC_F_INDIRECT)
- {
- t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_INDIRECT;
- /* Header is the first here */
- hdr_desc = map_guest_mem (vui, txvq->packed_desc[desc_current].addr,
- &hint);
- }
- if (txvq->packed_desc[desc_current].flags & VRING_DESC_F_NEXT)
- t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SIMPLE_CHAINED;
-
- if (!(txvq->packed_desc[desc_current].flags & VRING_DESC_F_NEXT) &&
- !(txvq->packed_desc[desc_current].flags & VRING_DESC_F_INDIRECT))
- t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SINGLE_DESC;
-
- t->first_desc_len = hdr_desc ? hdr_desc->len : 0;
-
- if (!hdr_desc || !(hdr = map_guest_mem (vui, hdr_desc->addr, &hint)))
- t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_MAP_ERROR;
- else
- {
- u32 len = vui->virtio_net_hdr_sz;
- clib_memcpy_fast (&t->hdr, hdr,
- len > hdr_desc->len ? hdr_desc->len : len);
- }
-}
-
-static_always_inline u32
-vhost_user_rx_discard_packet_packed (vlib_main_t * vm,
- vhost_user_intf_t * vui,
- vhost_user_vring_t * txvq,
- u32 discard_max)
-{
- u32 discarded_packets = 0;
- u16 mask = txvq->qsz_mask;
- u16 desc_current, desc_head;
-
- desc_head = desc_current = txvq->last_used_idx & mask;
-
- /*
- * On the RX side, each packet corresponds to one descriptor
- * (it is the same whether it is a shallow descriptor, chained, or indirect).
- * Therefore, discarding a packet is like discarding a descriptor.
- */
- while ((discarded_packets != discard_max) &&
- vhost_user_packed_desc_available (txvq, desc_current))
- {
- vhost_user_advance_last_avail_idx (txvq);
- discarded_packets++;
- desc_current = (desc_current + 1) & mask;
- }
-
- if (PREDICT_TRUE (discarded_packets))
- vhost_user_mark_desc_consumed (vui, txvq, desc_head, discarded_packets);
- return (discarded_packets);
-}
-
-static_always_inline u32
-vhost_user_input_copy_packed (vhost_user_intf_t * vui, vhost_copy_t * cpy,
- u16 copy_len, u32 * map_hint)
-{
- void *src0, *src1, *src2, *src3, *src4, *src5, *src6, *src7;
- u8 bad;
- u32 rc = VHOST_USER_INPUT_FUNC_ERROR_NO_ERROR;
-
- if (PREDICT_TRUE (copy_len >= 8))
- {
- src4 = map_guest_mem (vui, cpy[0].src, map_hint);
- src5 = map_guest_mem (vui, cpy[1].src, map_hint);
- src6 = map_guest_mem (vui, cpy[2].src, map_hint);
- src7 = map_guest_mem (vui, cpy[3].src, map_hint);
- bad = (src4 == 0) + (src5 == 0) + (src6 == 0) + (src7 == 0);
- if (PREDICT_FALSE (bad))
- goto one_by_one;
- clib_prefetch_load (src4);
- clib_prefetch_load (src5);
- clib_prefetch_load (src6);
- clib_prefetch_load (src7);
-
- while (PREDICT_TRUE (copy_len >= 8))
- {
- src0 = src4;
- src1 = src5;
- src2 = src6;
- src3 = src7;
-
- src4 = map_guest_mem (vui, cpy[4].src, map_hint);
- src5 = map_guest_mem (vui, cpy[5].src, map_hint);
- src6 = map_guest_mem (vui, cpy[6].src, map_hint);
- src7 = map_guest_mem (vui, cpy[7].src, map_hint);
- bad = (src4 == 0) + (src5 == 0) + (src6 == 0) + (src7 == 0);
- if (PREDICT_FALSE (bad))
- break;
-
- clib_prefetch_load (src4);
- clib_prefetch_load (src5);
- clib_prefetch_load (src6);
- clib_prefetch_load (src7);
-
- clib_memcpy_fast ((void *) cpy[0].dst, src0, cpy[0].len);
- clib_memcpy_fast ((void *) cpy[1].dst, src1, cpy[1].len);
- clib_memcpy_fast ((void *) cpy[2].dst, src2, cpy[2].len);
- clib_memcpy_fast ((void *) cpy[3].dst, src3, cpy[3].len);
- copy_len -= 4;
- cpy += 4;
- }
- }
-
-one_by_one:
- while (copy_len)
- {
- if (PREDICT_FALSE (!(src0 = map_guest_mem (vui, cpy->src, map_hint))))
- {
- rc = VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL;
- break;
- }
- clib_memcpy_fast ((void *) cpy->dst, src0, cpy->len);
- copy_len -= 1;
- cpy += 1;
- }
- return rc;
-}
-
-static_always_inline u32
-vhost_user_do_offload (vhost_user_intf_t *vui,
- vnet_virtio_vring_packed_desc_t *desc_table,
- u16 desc_current, u16 mask, vlib_buffer_t *b_head,
- u32 *map_hint)
-{
- u32 rc = VHOST_USER_INPUT_FUNC_ERROR_NO_ERROR;
- vnet_virtio_net_hdr_mrg_rxbuf_t *hdr;
- u8 *b_data;
- u32 desc_data_offset = vui->virtio_net_hdr_sz;
-
- hdr = map_guest_mem (vui, desc_table[desc_current].addr, map_hint);
- if (PREDICT_FALSE (hdr == 0))
- rc = VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL;
- else if (hdr->hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM)
- {
- if (desc_data_offset == desc_table[desc_current].len)
- {
- desc_current = (desc_current + 1) & mask;
- b_data =
- map_guest_mem (vui, desc_table[desc_current].addr, map_hint);
- if (PREDICT_FALSE (b_data == 0))
- rc = VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL;
- else
- vhost_user_handle_rx_offload (b_head, b_data, &hdr->hdr);
- }
- else
- {
- b_data = (u8 *) hdr + desc_data_offset;
- vhost_user_handle_rx_offload (b_head, b_data, &hdr->hdr);
- }
- }
-
- return rc;
-}
-
-static_always_inline u32
-vhost_user_compute_buffers_required (u32 desc_len, u32 buffer_data_size)
-{
- div_t result;
- u32 buffers_required;
-
- if (PREDICT_TRUE (buffer_data_size == 2048))
- {
- buffers_required = desc_len >> 11;
- if ((desc_len & 2047) != 0)
- buffers_required++;
- return (buffers_required);
- }
-
- if (desc_len < buffer_data_size)
- return 1;
-
- result = div (desc_len, buffer_data_size);
- if (result.rem)
- buffers_required = result.quot + 1;
- else
- buffers_required = result.quot;
-
- return (buffers_required);
-}
-
-static_always_inline u32
-vhost_user_compute_indirect_desc_len (vhost_user_intf_t * vui,
- vhost_user_vring_t * txvq,
- u32 buffer_data_size, u16 desc_current,
- u32 * map_hint)
-{
- vnet_virtio_vring_packed_desc_t *desc_table = txvq->packed_desc;
- u32 desc_len = 0;
- u16 desc_data_offset = vui->virtio_net_hdr_sz;
- u16 desc_idx = desc_current;
- u32 n_descs;
-
- n_descs = desc_table[desc_idx].len >> 4;
- desc_table = map_guest_mem (vui, desc_table[desc_idx].addr, map_hint);
- if (PREDICT_FALSE (desc_table == 0))
- return 0;
-
- for (desc_idx = 0; desc_idx < n_descs; desc_idx++)
- desc_len += desc_table[desc_idx].len;
-
- if (PREDICT_TRUE (desc_len > desc_data_offset))
- desc_len -= desc_data_offset;
-
- return vhost_user_compute_buffers_required (desc_len, buffer_data_size);
-}
-
-static_always_inline u32
-vhost_user_compute_chained_desc_len (vhost_user_intf_t * vui,
- vhost_user_vring_t * txvq,
- u32 buffer_data_size, u16 * current,
- u16 * n_left)
-{
- vnet_virtio_vring_packed_desc_t *desc_table = txvq->packed_desc;
- u32 desc_len = 0;
- u16 mask = txvq->qsz_mask;
-
- while (desc_table[*current].flags & VRING_DESC_F_NEXT)
- {
- desc_len += desc_table[*current].len;
- (*n_left)++;
- *current = (*current + 1) & mask;
- vhost_user_advance_last_avail_idx (txvq);
- }
- desc_len += desc_table[*current].len;
- (*n_left)++;
- *current = (*current + 1) & mask;
- vhost_user_advance_last_avail_idx (txvq);
-
- if (PREDICT_TRUE (desc_len > vui->virtio_net_hdr_sz))
- desc_len -= vui->virtio_net_hdr_sz;
-
- return vhost_user_compute_buffers_required (desc_len, buffer_data_size);
-}
-
-static_always_inline void
-vhost_user_assemble_packet (vnet_virtio_vring_packed_desc_t *desc_table,
- u16 *desc_idx, vlib_buffer_t *b_head,
- vlib_buffer_t **b_current, u32 **next,
- vlib_buffer_t ***b, u32 *bi_current,
- vhost_cpu_t *cpu, u16 *copy_len, u32 *buffers_used,
- u32 buffers_required, u32 *desc_data_offset,
- u32 buffer_data_size, u16 mask)
-{
- u32 desc_data_l;
-
- while (*desc_data_offset < desc_table[*desc_idx].len)
- {
- /* Get more output if necessary. Or end of packet. */
- if (PREDICT_FALSE ((*b_current)->current_length == buffer_data_size))
- {
- /* Get next output */
- u32 bi_next = **next;
- (*next)++;
- (*b_current)->next_buffer = bi_next;
- (*b_current)->flags |= VLIB_BUFFER_NEXT_PRESENT;
- *bi_current = bi_next;
- *b_current = **b;
- (*b)++;
- (*buffers_used)++;
- ASSERT (*buffers_used <= buffers_required);
- }
-
- /* Prepare a copy order executed later for the data */
- ASSERT (*copy_len < VHOST_USER_COPY_ARRAY_N);
- vhost_copy_t *cpy = &cpu->copy[*copy_len];
- (*copy_len)++;
- desc_data_l = desc_table[*desc_idx].len - *desc_data_offset;
- cpy->len = buffer_data_size - (*b_current)->current_length;
- cpy->len = (cpy->len > desc_data_l) ? desc_data_l : cpy->len;
- cpy->dst = (uword) (vlib_buffer_get_current (*b_current) +
- (*b_current)->current_length);
- cpy->src = desc_table[*desc_idx].addr + *desc_data_offset;
-
- *desc_data_offset += cpy->len;
-
- (*b_current)->current_length += cpy->len;
- b_head->total_length_not_including_first_buffer += cpy->len;
- }
- *desc_idx = (*desc_idx + 1) & mask;;
- *desc_data_offset = 0;
-}
-
-static_always_inline u32
-vhost_user_if_input_packed (vlib_main_t *vm, vhost_user_main_t *vum,
- vhost_user_intf_t *vui, u16 qid,
- vlib_node_runtime_t *node, u8 enable_csum)
-{
- vhost_user_vring_t *txvq = &vui->vrings[VHOST_VRING_IDX_TX (qid)];
- vnet_feature_main_t *fm = &feature_main;
- u8 feature_arc_idx = fm->device_input_feature_arc_index;
- u16 n_rx_packets = 0;
- u32 n_rx_bytes = 0;
- u16 n_left = 0;
- u32 buffers_required = 0;
- u32 n_left_to_next, *to_next;
- u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
- u32 n_trace = vlib_get_trace_count (vm, node);
- u32 buffer_data_size = vlib_buffer_get_default_data_size (vm);
- u32 map_hint = 0;
- vhost_cpu_t *cpu = &vum->cpus[vm->thread_index];
- u16 copy_len = 0;
- u32 current_config_index = ~0;
- u16 mask = txvq->qsz_mask;
- u16 desc_current, desc_head, last_used_idx;
- vnet_virtio_vring_packed_desc_t *desc_table = 0;
- u32 n_descs_processed = 0;
- u32 rv;
- vlib_buffer_t **b;
- u32 *next;
- u32 buffers_used = 0;
- u16 current, n_descs_to_process;
-
- /* The descriptor table is not ready yet */
- if (PREDICT_FALSE (txvq->packed_desc == 0))
- goto done;
-
- /* do we have pending interrupts ? */
- vhost_user_vring_t *rxvq = &vui->vrings[VHOST_VRING_IDX_RX (qid)];
- vhost_user_input_do_interrupt (vm, vui, txvq, rxvq);
-
- /*
- * For adaptive mode, it is optimized to reduce interrupts.
- * If the scheduler switches the input node to polling due
- * to burst of traffic, we tell the driver no interrupt.
- * When the traffic subsides, the scheduler switches the node back to
- * interrupt mode. We must tell the driver we want interrupt.
- */
- if (PREDICT_FALSE (txvq->mode == VNET_HW_IF_RX_MODE_ADAPTIVE))
- {
- if ((node->flags &
- VLIB_NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE) ||
- !(node->flags &
- VLIB_NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE))
- /* Tell driver we want notification */
- txvq->used_event->flags = 0;
- else
- /* Tell driver we don't want notification */
- txvq->used_event->flags = VRING_EVENT_F_DISABLE;
- }
-
- last_used_idx = txvq->last_used_idx & mask;
- desc_head = desc_current = last_used_idx;
-
- if (vhost_user_packed_desc_available (txvq, desc_current) == 0)
- goto done;
-
- if (PREDICT_FALSE (!vui->admin_up || !vui->is_ready || !(txvq->enabled)))
- {
- /*
- * Discard input packet if interface is admin down or vring is not
- * enabled.
- * "For example, for a networking device, in the disabled state
- * client must not supply any new RX packets, but must process
- * and discard any TX packets."
- */
- rv = vhost_user_rx_discard_packet_packed (vm, vui, txvq,
- VHOST_USER_DOWN_DISCARD_COUNT);
- vlib_error_count (vm, vhost_user_input_node.index,
- VHOST_USER_INPUT_FUNC_ERROR_NOT_READY, rv);
- goto done;
- }
-
- vhost_user_input_setup_frame (vm, node, vui, &current_config_index,
- &next_index, &to_next, &n_left_to_next);
-
- /*
- * Compute n_left and total buffers needed
- */
- desc_table = txvq->packed_desc;
- current = desc_current;
- while (vhost_user_packed_desc_available (txvq, current) &&
- (n_left < VLIB_FRAME_SIZE))
- {
- if (desc_table[current].flags & VRING_DESC_F_INDIRECT)
- {
- buffers_required +=
- vhost_user_compute_indirect_desc_len (vui, txvq, buffer_data_size,
- current, &map_hint);
- n_left++;
- current = (current + 1) & mask;
- vhost_user_advance_last_avail_idx (txvq);
- }
- else
- {
- buffers_required +=
- vhost_user_compute_chained_desc_len (vui, txvq, buffer_data_size,
- &current, &n_left);
- }
- }
-
- /* Something is broken if we need more than 10000 buffers */
- if (PREDICT_FALSE ((buffers_required == 0) || (buffers_required > 10000)))
- {
- rv = vhost_user_rx_discard_packet_packed (vm, vui, txvq, n_left);
- vlib_error_count (vm, vhost_user_input_node.index,
- VHOST_USER_INPUT_FUNC_ERROR_NO_BUFFER, rv);
- goto done;
- }
-
- vec_validate (cpu->to_next_list, buffers_required);
- rv = vlib_buffer_alloc (vm, cpu->to_next_list, buffers_required);
- if (PREDICT_FALSE (rv != buffers_required))
- {
- vlib_buffer_free (vm, cpu->to_next_list, rv);
- rv = vhost_user_rx_discard_packet_packed (vm, vui, txvq, n_left);
- vlib_error_count (vm, vhost_user_input_node.index,
- VHOST_USER_INPUT_FUNC_ERROR_NO_BUFFER, rv);
- goto done;
- }
-
- next = cpu->to_next_list;
- vec_validate (cpu->rx_buffers_pdesc, buffers_required);
- vlib_get_buffers (vm, next, cpu->rx_buffers_pdesc, buffers_required);
- b = cpu->rx_buffers_pdesc;
- n_descs_processed = n_left;
-
- while (n_left)
- {
- vlib_buffer_t *b_head, *b_current;
- u32 bi_current;
- u32 desc_data_offset;
- u16 desc_idx = desc_current;
- u32 n_descs;
-
- desc_table = txvq->packed_desc;
- to_next[0] = bi_current = next[0];
- b_head = b_current = b[0];
- b++;
- buffers_used++;
- ASSERT (buffers_used <= buffers_required);
- to_next++;
- next++;
- n_left_to_next--;
-
- /* The buffer should already be initialized */
- b_head->total_length_not_including_first_buffer = 0;
- b_head->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
- desc_data_offset = vui->virtio_net_hdr_sz;
- n_descs_to_process = 1;
-
- if (desc_table[desc_idx].flags & VRING_DESC_F_INDIRECT)
- {
- n_descs = desc_table[desc_idx].len >> 4;
- desc_table = map_guest_mem (vui, desc_table[desc_idx].addr,
- &map_hint);
- desc_idx = 0;
- if (PREDICT_FALSE (desc_table == 0) ||
- (enable_csum &&
- (PREDICT_FALSE
- (vhost_user_do_offload
- (vui, desc_table, desc_idx, mask, b_head,
- &map_hint) != VHOST_USER_INPUT_FUNC_ERROR_NO_ERROR))))
- {
- vlib_error_count (vm, node->node_index,
- VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL, 1);
- to_next--;
- next--;
- n_left_to_next++;
- buffers_used--;
- b--;
- goto out;
- }
- while (n_descs)
- {
- vhost_user_assemble_packet (desc_table, &desc_idx, b_head,
- &b_current, &next, &b, &bi_current,
- cpu, &copy_len, &buffers_used,
- buffers_required, &desc_data_offset,
- buffer_data_size, mask);
- n_descs--;
- }
- }
- else
- {
- if (enable_csum)
- {
- rv = vhost_user_do_offload (vui, desc_table, desc_idx, mask,
- b_head, &map_hint);
- if (PREDICT_FALSE (rv != VHOST_USER_INPUT_FUNC_ERROR_NO_ERROR))
- {
- vlib_error_count (vm, node->node_index, rv, 1);
- to_next--;
- next--;
- n_left_to_next++;
- buffers_used--;
- b--;
- goto out;
- }
- }
- /*
- * For chained descriptor, we process all chains in a single while
- * loop. So count how many descriptors in the chain.
- */
- n_descs_to_process = 1;
- while (desc_table[desc_idx].flags & VRING_DESC_F_NEXT)
- {
- vhost_user_assemble_packet (desc_table, &desc_idx, b_head,
- &b_current, &next, &b, &bi_current,
- cpu, &copy_len, &buffers_used,
- buffers_required, &desc_data_offset,
- buffer_data_size, mask);
- n_descs_to_process++;
- }
- vhost_user_assemble_packet (desc_table, &desc_idx, b_head,
- &b_current, &next, &b, &bi_current,
- cpu, &copy_len, &buffers_used,
- buffers_required, &desc_data_offset,
- buffer_data_size, mask);
- }
-
- n_rx_bytes += b_head->total_length_not_including_first_buffer;
- n_rx_packets++;
-
- b_head->total_length_not_including_first_buffer -=
- b_head->current_length;
-
- vnet_buffer (b_head)->sw_if_index[VLIB_RX] = vui->sw_if_index;
- vnet_buffer (b_head)->sw_if_index[VLIB_TX] = ~0;
- b_head->error = 0;
-
- if (current_config_index != ~0)
- {
- b_head->current_config_index = current_config_index;
- vnet_buffer (b_head)->feature_arc_index = feature_arc_idx;
- }
-
- out:
- ASSERT (n_left >= n_descs_to_process);
- n_left -= n_descs_to_process;
-
- /* advance to next descrptor */
- desc_current = (desc_current + n_descs_to_process) & mask;
-
- /*
- * Although separating memory copies from virtio ring parsing
- * is beneficial, we can offer to perform the copies from time
- * to time in order to free some space in the ring.
- */
- if (PREDICT_FALSE (copy_len >= VHOST_USER_RX_COPY_THRESHOLD))
- {
- rv = vhost_user_input_copy_packed (vui, cpu->copy, copy_len,
- &map_hint);
- if (PREDICT_FALSE (rv != VHOST_USER_INPUT_FUNC_ERROR_NO_ERROR))
- vlib_error_count (vm, node->node_index, rv, 1);
- copy_len = 0;
- }
- }
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
-
- /* Do the memory copies */
- rv = vhost_user_input_copy_packed (vui, cpu->copy, copy_len, &map_hint);
- if (PREDICT_FALSE (rv != VHOST_USER_INPUT_FUNC_ERROR_NO_ERROR))
- vlib_error_count (vm, node->node_index, rv, 1);
-
- /* Must do the tracing before giving buffers back to driver */
- if (PREDICT_FALSE (n_trace))
- {
- u32 left = n_rx_packets;
-
- b = cpu->rx_buffers_pdesc;
- while (n_trace && left)
- {
- if (PREDICT_TRUE
- (vlib_trace_buffer
- (vm, node, next_index, b[0], /* follow_chain */ 0)))
- {
- vhost_trace_t *t0;
- t0 = vlib_add_trace (vm, node, b[0], sizeof (t0[0]));
- vhost_user_rx_trace_packed (t0, vui, qid, txvq, last_used_idx);
- last_used_idx = (last_used_idx + 1) & mask;
- n_trace--;
- vlib_set_trace_count (vm, node, n_trace);
- }
- left--;
- b++;
- }
- }
-
- /*
- * Give buffers back to driver.
- */
- vhost_user_mark_desc_consumed (vui, txvq, desc_head, n_descs_processed);
-
- /* interrupt (call) handling */
- if ((txvq->callfd_idx != ~0) &&
- (txvq->avail_event->flags != VRING_EVENT_F_DISABLE))
- {
- txvq->n_since_last_int += n_rx_packets;
- if (txvq->n_since_last_int > vum->coalesce_frames)
- vhost_user_send_call (vm, vui, txvq);
- }
-
- /* increase rx counters */
- vlib_increment_combined_counter
- (vnet_main.interface_main.combined_sw_if_counters
- + VNET_INTERFACE_COUNTER_RX, vm->thread_index, vui->sw_if_index,
- n_rx_packets, n_rx_bytes);
-
- vnet_device_increment_rx_packets (vm->thread_index, n_rx_packets);
-
- if (PREDICT_FALSE (buffers_used < buffers_required))
- vlib_buffer_free (vm, next, buffers_required - buffers_used);
-
-done:
- return n_rx_packets;
-}
-
-VLIB_NODE_FN (vhost_user_input_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- vhost_user_main_t *vum = &vhost_user_main;
- uword n_rx_packets = 0;
- vhost_user_intf_t *vui;
- vnet_hw_if_rxq_poll_vector_t *pv = vnet_hw_if_get_rxq_poll_vector (vm, node);
- vnet_hw_if_rxq_poll_vector_t *pve;
-
- vec_foreach (pve, pv)
- {
- vui = pool_elt_at_index (vum->vhost_user_interfaces, pve->dev_instance);
- if (vhost_user_is_packed_ring_supported (vui))
- {
- if (vui->features & VIRTIO_FEATURE (VIRTIO_NET_F_CSUM))
- n_rx_packets += vhost_user_if_input_packed (
- vm, vum, vui, pve->queue_id, node, 1);
- else
- n_rx_packets += vhost_user_if_input_packed (
- vm, vum, vui, pve->queue_id, node, 0);
- }
- else
- {
- if (vui->features & VIRTIO_FEATURE (VIRTIO_NET_F_CSUM))
- n_rx_packets +=
- vhost_user_if_input (vm, vum, vui, pve->queue_id, node, 1);
- else
- n_rx_packets +=
- vhost_user_if_input (vm, vum, vui, pve->queue_id, node, 0);
- }
- }
-
- return n_rx_packets;
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (vhost_user_input_node) = {
- .type = VLIB_NODE_TYPE_INPUT,
- .name = "vhost-user-input",
- .sibling_of = "device-input",
- .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
-
- /* Will be enabled if/when hardware is detected. */
- .state = VLIB_NODE_STATE_DISABLED,
-
- .format_buffer = format_ethernet_header_with_length,
- .format_trace = format_vhost_trace,
-
- .n_errors = VHOST_USER_INPUT_FUNC_N_ERROR,
- .error_strings = vhost_user_input_func_error_strings,
-};
-/* *INDENT-ON* */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
diff --git a/src/vnet/devices/virtio/vhost_user_output.c b/src/vnet/devices/virtio/vhost_user_output.c
deleted file mode 100644
index 3b7bf97c3f8..00000000000
--- a/src/vnet/devices/virtio/vhost_user_output.c
+++ /dev/null
@@ -1,1145 +0,0 @@
-/*
- *------------------------------------------------------------------
- * vhost-user-output
- *
- * Copyright (c) 2014-2018 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *------------------------------------------------------------------
- */
-
-#include <stddef.h>
-#include <fcntl.h> /* for open */
-#include <sys/ioctl.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/uio.h> /* for iovec */
-#include <netinet/in.h>
-#include <sys/vfs.h>
-
-#include <linux/if_arp.h>
-#include <linux/if_tun.h>
-
-#include <vlib/vlib.h>
-#include <vlib/unix/unix.h>
-
-#include <vnet/ethernet/ethernet.h>
-#include <vnet/devices/devices.h>
-#include <vnet/feature/feature.h>
-#include <vnet/ip/ip_psh_cksum.h>
-
-#include <vnet/devices/virtio/vhost_user.h>
-#include <vnet/devices/virtio/vhost_user_inline.h>
-
-#include <vnet/gso/hdr_offset_parser.h>
-/*
- * On the transmit side, we keep processing the buffers from vlib in the while
- * loop and prepare the copy order to be executed later. However, the static
- * array which we keep the copy order is limited to VHOST_USER_COPY_ARRAY_N
- * entries. In order to not corrupt memory, we have to do the copy when the
- * static array reaches the copy threshold. We subtract 40 in case the code
- * goes into the inner loop for a maximum of 64k frames which may require
- * more array entries. We subtract 200 because our default buffer size is
- * 2048 and the default desc len is likely 1536. While it takes less than 40
- * vlib buffers for the jumbo frame, it may take twice as much descriptors
- * for the same jumbo frame. Use 200 for the extra head room.
- */
-#define VHOST_USER_TX_COPY_THRESHOLD (VHOST_USER_COPY_ARRAY_N - 200)
-
-extern vnet_device_class_t vhost_user_device_class;
-
-#define foreach_vhost_user_tx_func_error \
- _(NONE, "no error") \
- _(NOT_READY, "vhost vring not ready") \
- _(DOWN, "vhost interface is down") \
- _(PKT_DROP_NOBUF, "tx packet drops (no available descriptors)") \
- _(PKT_DROP_NOMRG, "tx packet drops (cannot merge descriptors)") \
- _(MMAP_FAIL, "mmap failure") \
- _(INDIRECT_OVERFLOW, "indirect descriptor table overflow")
-
-typedef enum
-{
-#define _(f,s) VHOST_USER_TX_FUNC_ERROR_##f,
- foreach_vhost_user_tx_func_error
-#undef _
- VHOST_USER_TX_FUNC_N_ERROR,
-} vhost_user_tx_func_error_t;
-
-static __clib_unused char *vhost_user_tx_func_error_strings[] = {
-#define _(n,s) s,
- foreach_vhost_user_tx_func_error
-#undef _
-};
-
-static __clib_unused u8 *
-format_vhost_user_interface_name (u8 * s, va_list * args)
-{
- u32 i = va_arg (*args, u32);
- u32 show_dev_instance = ~0;
- vhost_user_main_t *vum = &vhost_user_main;
-
- if (i < vec_len (vum->show_dev_instance_by_real_dev_instance))
- show_dev_instance = vum->show_dev_instance_by_real_dev_instance[i];
-
- if (show_dev_instance != ~0)
- i = show_dev_instance;
-
- s = format (s, "VirtualEthernet0/0/%d", i);
- return s;
-}
-
-static __clib_unused int
-vhost_user_name_renumber (vnet_hw_interface_t * hi, u32 new_dev_instance)
-{
- // FIXME: check if the new dev instance is already used
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui = pool_elt_at_index (vum->vhost_user_interfaces,
- hi->dev_instance);
-
- vec_validate_init_empty (vum->show_dev_instance_by_real_dev_instance,
- hi->dev_instance, ~0);
-
- vum->show_dev_instance_by_real_dev_instance[hi->dev_instance] =
- new_dev_instance;
-
- vu_log_debug (vui, "renumbered vhost-user interface dev_instance %d to %d",
- hi->dev_instance, new_dev_instance);
-
- return 0;
-}
-
-static_always_inline void
-vhost_user_tx_trace (vhost_trace_t * t,
- vhost_user_intf_t * vui, u16 qid,
- vlib_buffer_t * b, vhost_user_vring_t * rxvq)
-{
- vhost_user_main_t *vum = &vhost_user_main;
- u32 last_avail_idx = rxvq->last_avail_idx;
- u32 desc_current = rxvq->avail->ring[last_avail_idx & rxvq->qsz_mask];
- vnet_virtio_vring_desc_t *hdr_desc = 0;
- u32 hint = 0;
-
- clib_memset (t, 0, sizeof (*t));
- t->device_index = vui - vum->vhost_user_interfaces;
- t->qid = qid;
-
- hdr_desc = &rxvq->desc[desc_current];
- if (rxvq->desc[desc_current].flags & VRING_DESC_F_INDIRECT)
- {
- t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_INDIRECT;
- /* Header is the first here */
- hdr_desc = map_guest_mem (vui, rxvq->desc[desc_current].addr, &hint);
- }
- if (rxvq->desc[desc_current].flags & VRING_DESC_F_NEXT)
- {
- t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SIMPLE_CHAINED;
- }
- if (!(rxvq->desc[desc_current].flags & VRING_DESC_F_NEXT) &&
- !(rxvq->desc[desc_current].flags & VRING_DESC_F_INDIRECT))
- {
- t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SINGLE_DESC;
- }
-
- t->first_desc_len = hdr_desc ? hdr_desc->len : 0;
-}
-
-static_always_inline u32
-vhost_user_tx_copy (vhost_user_intf_t * vui, vhost_copy_t * cpy,
- u16 copy_len, u32 * map_hint)
-{
- void *dst0, *dst1, *dst2, *dst3;
- if (PREDICT_TRUE (copy_len >= 4))
- {
- if (PREDICT_FALSE (!(dst2 = map_guest_mem (vui, cpy[0].dst, map_hint))))
- return 1;
- if (PREDICT_FALSE (!(dst3 = map_guest_mem (vui, cpy[1].dst, map_hint))))
- return 1;
- while (PREDICT_TRUE (copy_len >= 4))
- {
- dst0 = dst2;
- dst1 = dst3;
-
- if (PREDICT_FALSE
- (!(dst2 = map_guest_mem (vui, cpy[2].dst, map_hint))))
- return 1;
- if (PREDICT_FALSE
- (!(dst3 = map_guest_mem (vui, cpy[3].dst, map_hint))))
- return 1;
-
- clib_prefetch_load ((void *) cpy[2].src);
- clib_prefetch_load ((void *) cpy[3].src);
-
- clib_memcpy_fast (dst0, (void *) cpy[0].src, cpy[0].len);
- clib_memcpy_fast (dst1, (void *) cpy[1].src, cpy[1].len);
-
- vhost_user_log_dirty_pages_2 (vui, cpy[0].dst, cpy[0].len, 1);
- vhost_user_log_dirty_pages_2 (vui, cpy[1].dst, cpy[1].len, 1);
- copy_len -= 2;
- cpy += 2;
- }
- }
- while (copy_len)
- {
- if (PREDICT_FALSE (!(dst0 = map_guest_mem (vui, cpy->dst, map_hint))))
- return 1;
- clib_memcpy_fast (dst0, (void *) cpy->src, cpy->len);
- vhost_user_log_dirty_pages_2 (vui, cpy->dst, cpy->len, 1);
- copy_len -= 1;
- cpy += 1;
- }
- return 0;
-}
-
-static_always_inline void
-vhost_user_handle_tx_offload (vhost_user_intf_t *vui, vlib_buffer_t *b,
- vnet_virtio_net_hdr_t *hdr)
-{
- generic_header_offset_t gho = { 0 };
- int is_ip4 = b->flags & VNET_BUFFER_F_IS_IP4;
- int is_ip6 = b->flags & VNET_BUFFER_F_IS_IP6;
- vnet_buffer_oflags_t oflags = vnet_buffer (b)->oflags;
- u16 psh_cksum = 0;
- ip4_header_t *ip4 = 0;
- ip6_header_t *ip6 = 0;
-
- ASSERT (!(is_ip4 && is_ip6));
- vnet_generic_header_offset_parser (b, &gho, 1 /* l2 */ , is_ip4, is_ip6);
- if (oflags & VNET_BUFFER_OFFLOAD_F_IP_CKSUM)
- {
- ip4 =
- (ip4_header_t *) (vlib_buffer_get_current (b) + gho.l3_hdr_offset);
- ip4->checksum = ip4_header_checksum (ip4);
- psh_cksum = ip4_pseudo_header_cksum (ip4);
- }
- else
- {
- ip6 = (ip6_header_t *) (vlib_buffer_get_current (b) + gho.l3_hdr_offset);
- psh_cksum = ip6_pseudo_header_cksum (ip6);
- }
-
- /* checksum offload */
- if (oflags & VNET_BUFFER_OFFLOAD_F_UDP_CKSUM)
- {
- udp_header_t *udp =
- (udp_header_t *) (vlib_buffer_get_current (b) + gho.l4_hdr_offset);
- udp->checksum = psh_cksum;
- hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
- hdr->csum_start = gho.l4_hdr_offset;
- hdr->csum_offset = offsetof (udp_header_t, checksum);
- }
- else if (oflags & VNET_BUFFER_OFFLOAD_F_TCP_CKSUM)
- {
- tcp_header_t *tcp =
- (tcp_header_t *) (vlib_buffer_get_current (b) + gho.l4_hdr_offset);
- tcp->checksum = psh_cksum;
- hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
- hdr->csum_start = gho.l4_hdr_offset;
- hdr->csum_offset = offsetof (tcp_header_t, checksum);
- }
-
- /* GSO offload */
- if (b->flags & VNET_BUFFER_F_GSO)
- {
- if (oflags & VNET_BUFFER_OFFLOAD_F_TCP_CKSUM)
- {
- if (is_ip4 &&
- (vui->features & VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_TSO4)))
- {
- hdr->gso_size = vnet_buffer2 (b)->gso_size;
- hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
- }
- else if (is_ip6 &&
- (vui->features & VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_TSO6)))
- {
- hdr->gso_size = vnet_buffer2 (b)->gso_size;
- hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
- }
- }
- else if ((vui->features & VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_UFO)) &&
- (oflags & VNET_BUFFER_OFFLOAD_F_UDP_CKSUM))
- {
- hdr->gso_size = vnet_buffer2 (b)->gso_size;
- hdr->gso_type = VIRTIO_NET_HDR_GSO_UDP;
- }
- }
-}
-
-static_always_inline void
-vhost_user_mark_desc_available (vlib_main_t * vm, vhost_user_intf_t * vui,
- vhost_user_vring_t * rxvq,
- u16 * n_descs_processed, u8 chained,
- vlib_frame_t * frame, u32 n_left)
-{
- u16 desc_idx, flags;
- vnet_virtio_vring_packed_desc_t *desc_table = rxvq->packed_desc;
- u16 last_used_idx = rxvq->last_used_idx;
-
- if (PREDICT_FALSE (*n_descs_processed == 0))
- return;
-
- if (rxvq->used_wrap_counter)
- flags = desc_table[last_used_idx & rxvq->qsz_mask].flags |
- (VRING_DESC_F_AVAIL | VRING_DESC_F_USED);
- else
- flags = desc_table[last_used_idx & rxvq->qsz_mask].flags &
- ~(VRING_DESC_F_AVAIL | VRING_DESC_F_USED);
-
- vhost_user_advance_last_used_idx (rxvq);
-
- for (desc_idx = 1; desc_idx < *n_descs_processed; desc_idx++)
- {
- if (rxvq->used_wrap_counter)
- desc_table[rxvq->last_used_idx & rxvq->qsz_mask].flags |=
- (VRING_DESC_F_AVAIL | VRING_DESC_F_USED);
- else
- desc_table[rxvq->last_used_idx & rxvq->qsz_mask].flags &=
- ~(VRING_DESC_F_AVAIL | VRING_DESC_F_USED);
- vhost_user_advance_last_used_idx (rxvq);
- }
-
- desc_table[last_used_idx & rxvq->qsz_mask].flags = flags;
-
- *n_descs_processed = 0;
-
- if (chained)
- {
- vnet_virtio_vring_packed_desc_t *desc_table = rxvq->packed_desc;
-
- while (desc_table[rxvq->last_used_idx & rxvq->qsz_mask].flags &
- VRING_DESC_F_NEXT)
- vhost_user_advance_last_used_idx (rxvq);
-
- /* Advance past the current chained table entries */
- vhost_user_advance_last_used_idx (rxvq);
- }
-
- /* interrupt (call) handling */
- if ((rxvq->callfd_idx != ~0) &&
- (rxvq->avail_event->flags != VRING_EVENT_F_DISABLE))
- {
- vhost_user_main_t *vum = &vhost_user_main;
-
- rxvq->n_since_last_int += frame->n_vectors - n_left;
- if (rxvq->n_since_last_int > vum->coalesce_frames)
- vhost_user_send_call (vm, vui, rxvq);
- }
-}
-
-static_always_inline void
-vhost_user_tx_trace_packed (vhost_trace_t * t, vhost_user_intf_t * vui,
- u16 qid, vlib_buffer_t * b,
- vhost_user_vring_t * rxvq)
-{
- vhost_user_main_t *vum = &vhost_user_main;
- u32 last_avail_idx = rxvq->last_avail_idx;
- u32 desc_current = last_avail_idx & rxvq->qsz_mask;
- vnet_virtio_vring_packed_desc_t *hdr_desc = 0;
- u32 hint = 0;
-
- clib_memset (t, 0, sizeof (*t));
- t->device_index = vui - vum->vhost_user_interfaces;
- t->qid = qid;
-
- hdr_desc = &rxvq->packed_desc[desc_current];
- if (rxvq->packed_desc[desc_current].flags & VRING_DESC_F_INDIRECT)
- {
- t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_INDIRECT;
- /* Header is the first here */
- hdr_desc = map_guest_mem (vui, rxvq->packed_desc[desc_current].addr,
- &hint);
- }
- if (rxvq->packed_desc[desc_current].flags & VRING_DESC_F_NEXT)
- {
- t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SIMPLE_CHAINED;
- }
- if (!(rxvq->packed_desc[desc_current].flags & VRING_DESC_F_NEXT) &&
- !(rxvq->packed_desc[desc_current].flags & VRING_DESC_F_INDIRECT))
- {
- t->virtio_ring_flags |= 1 << VIRTIO_TRACE_F_SINGLE_DESC;
- }
-
- t->first_desc_len = hdr_desc ? hdr_desc->len : 0;
-}
-
-static_always_inline uword
-vhost_user_device_class_packed (vlib_main_t *vm, vlib_node_runtime_t *node,
- vlib_frame_t *frame, vhost_user_intf_t *vui,
- vhost_user_vring_t *rxvq)
-{
- u32 *buffers = vlib_frame_vector_args (frame);
- u32 n_left = frame->n_vectors;
- vhost_user_main_t *vum = &vhost_user_main;
- u32 qid = rxvq->qid;
- u8 error;
- u32 thread_index = vm->thread_index;
- vhost_cpu_t *cpu = &vum->cpus[thread_index];
- u32 map_hint = 0;
- u8 retry = 8;
- u16 copy_len;
- u16 tx_headers_len;
- vnet_virtio_vring_packed_desc_t *desc_table;
- u32 or_flags;
- u16 desc_head, desc_index, desc_len;
- u16 n_descs_processed;
- u8 indirect, chained;
-
-retry:
- error = VHOST_USER_TX_FUNC_ERROR_NONE;
- tx_headers_len = 0;
- copy_len = 0;
- n_descs_processed = 0;
-
- while (n_left > 0)
- {
- vlib_buffer_t *b0, *current_b0;
- uword buffer_map_addr;
- u32 buffer_len;
- u16 bytes_left;
- u32 total_desc_len = 0;
- u16 n_entries = 0;
-
- indirect = 0;
- chained = 0;
- if (PREDICT_TRUE (n_left > 1))
- vlib_prefetch_buffer_with_index (vm, buffers[1], LOAD);
-
- b0 = vlib_get_buffer (vm, buffers[0]);
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- cpu->current_trace = vlib_add_trace (vm, node, b0,
- sizeof (*cpu->current_trace));
- vhost_user_tx_trace_packed (cpu->current_trace, vui, qid / 2, b0,
- rxvq);
- }
-
- desc_table = rxvq->packed_desc;
- desc_head = desc_index = rxvq->last_avail_idx & rxvq->qsz_mask;
- if (PREDICT_FALSE (!vhost_user_packed_desc_available (rxvq, desc_head)))
- {
- error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
- goto done;
- }
- /*
- * Go deeper in case of indirect descriptor.
- * To test it, turn off mrg_rxbuf.
- */
- if (desc_table[desc_head].flags & VRING_DESC_F_INDIRECT)
- {
- indirect = 1;
- if (PREDICT_FALSE (desc_table[desc_head].len <
- sizeof (vnet_virtio_vring_packed_desc_t)))
- {
- error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW;
- goto done;
- }
- n_entries = desc_table[desc_head].len >> 4;
- desc_table = map_guest_mem (vui, desc_table[desc_index].addr,
- &map_hint);
- if (PREDICT_FALSE (desc_table == 0))
- {
- error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
- goto done;
- }
- desc_index = 0;
- }
- else if (rxvq->packed_desc[desc_head].flags & VRING_DESC_F_NEXT)
- chained = 1;
-
- desc_len = vui->virtio_net_hdr_sz;
- buffer_map_addr = desc_table[desc_index].addr;
- buffer_len = desc_table[desc_index].len;
-
- /* Get a header from the header array */
- vnet_virtio_net_hdr_mrg_rxbuf_t *hdr = &cpu->tx_headers[tx_headers_len];
- tx_headers_len++;
- hdr->hdr.flags = 0;
- hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE;
- hdr->num_buffers = 1;
-
- or_flags = (b0->flags & VNET_BUFFER_F_OFFLOAD);
-
- /* Guest supports csum offload and buffer requires checksum offload? */
- if (or_flags &&
- (vui->features & VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_CSUM)))
- vhost_user_handle_tx_offload (vui, b0, &hdr->hdr);
-
- /* Prepare a copy order executed later for the header */
- ASSERT (copy_len < VHOST_USER_COPY_ARRAY_N);
- vhost_copy_t *cpy = &cpu->copy[copy_len];
- copy_len++;
- cpy->len = vui->virtio_net_hdr_sz;
- cpy->dst = buffer_map_addr;
- cpy->src = (uword) hdr;
-
- buffer_map_addr += vui->virtio_net_hdr_sz;
- buffer_len -= vui->virtio_net_hdr_sz;
- bytes_left = b0->current_length;
- current_b0 = b0;
- while (1)
- {
- if (buffer_len == 0)
- {
- /* Get new output */
- if (chained)
- {
- /*
- * Next one is chained
- * Test it with both indirect and mrg_rxbuf off
- */
- if (PREDICT_FALSE (!(desc_table[desc_index].flags &
- VRING_DESC_F_NEXT)))
- {
- /*
- * Last descriptor in chain.
- * Dequeue queued descriptors for this packet
- */
- vhost_user_dequeue_chained_descs (rxvq,
- &n_descs_processed);
- error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
- goto done;
- }
- vhost_user_advance_last_avail_idx (rxvq);
- desc_index = rxvq->last_avail_idx & rxvq->qsz_mask;
- n_descs_processed++;
- buffer_map_addr = desc_table[desc_index].addr;
- buffer_len = desc_table[desc_index].len;
- total_desc_len += desc_len;
- desc_len = 0;
- }
- else if (indirect)
- {
- /*
- * Indirect table
- * Test it with mrg_rxnuf off
- */
- if (PREDICT_TRUE (n_entries > 0))
- n_entries--;
- else
- {
- /* Dequeue queued descriptors for this packet */
- vhost_user_dequeue_chained_descs (rxvq,
- &n_descs_processed);
- error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW;
- goto done;
- }
- total_desc_len += desc_len;
- desc_index = (desc_index + 1) & rxvq->qsz_mask;
- buffer_map_addr = desc_table[desc_index].addr;
- buffer_len = desc_table[desc_index].len;
- desc_len = 0;
- }
- else if (vui->virtio_net_hdr_sz == 12)
- {
- /*
- * MRG is available
- * This is the default setting for the guest VM
- */
- vnet_virtio_net_hdr_mrg_rxbuf_t *hdr =
- &cpu->tx_headers[tx_headers_len - 1];
-
- desc_table[desc_index].len = desc_len;
- vhost_user_advance_last_avail_idx (rxvq);
- desc_head = desc_index =
- rxvq->last_avail_idx & rxvq->qsz_mask;
- hdr->num_buffers++;
- n_descs_processed++;
- desc_len = 0;
-
- if (PREDICT_FALSE (!vhost_user_packed_desc_available
- (rxvq, desc_index)))
- {
- /* Dequeue queued descriptors for this packet */
- vhost_user_dequeue_descs (rxvq, hdr,
- &n_descs_processed);
- error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
- goto done;
- }
-
- buffer_map_addr = desc_table[desc_index].addr;
- buffer_len = desc_table[desc_index].len;
- }
- else
- {
- error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOMRG;
- goto done;
- }
- }
-
- ASSERT (copy_len < VHOST_USER_COPY_ARRAY_N);
- vhost_copy_t *cpy = &cpu->copy[copy_len];
- copy_len++;
- cpy->len = bytes_left;
- cpy->len = (cpy->len > buffer_len) ? buffer_len : cpy->len;
- cpy->dst = buffer_map_addr;
- cpy->src = (uword) vlib_buffer_get_current (current_b0) +
- current_b0->current_length - bytes_left;
-
- bytes_left -= cpy->len;
- buffer_len -= cpy->len;
- buffer_map_addr += cpy->len;
- desc_len += cpy->len;
-
- clib_prefetch_load (&rxvq->packed_desc);
-
- /* Check if vlib buffer has more data. If not, get more or break */
- if (PREDICT_TRUE (!bytes_left))
- {
- if (PREDICT_FALSE
- (current_b0->flags & VLIB_BUFFER_NEXT_PRESENT))
- {
- current_b0 = vlib_get_buffer (vm, current_b0->next_buffer);
- bytes_left = current_b0->current_length;
- }
- else
- {
- /* End of packet */
- break;
- }
- }
- }
-
- /* Move from available to used ring */
- total_desc_len += desc_len;
- rxvq->packed_desc[desc_head].len = total_desc_len;
-
- vhost_user_advance_last_avail_table_idx (vui, rxvq, chained);
- n_descs_processed++;
-
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
- cpu->current_trace->hdr = cpu->tx_headers[tx_headers_len - 1];
-
- n_left--;
-
- /*
- * Do the copy periodically to prevent
- * cpu->copy array overflow and corrupt memory
- */
- if (PREDICT_FALSE (copy_len >= VHOST_USER_TX_COPY_THRESHOLD) || chained)
- {
- if (PREDICT_FALSE (vhost_user_tx_copy (vui, cpu->copy, copy_len,
- &map_hint)))
- vlib_error_count (vm, node->node_index,
- VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL, 1);
- copy_len = 0;
-
- /* give buffers back to driver */
- vhost_user_mark_desc_available (vm, vui, rxvq, &n_descs_processed,
- chained, frame, n_left);
- }
-
- buffers++;
- }
-
-done:
- if (PREDICT_TRUE (copy_len))
- {
- if (PREDICT_FALSE (vhost_user_tx_copy (vui, cpu->copy, copy_len,
- &map_hint)))
- vlib_error_count (vm, node->node_index,
- VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL, 1);
-
- vhost_user_mark_desc_available (vm, vui, rxvq, &n_descs_processed,
- chained, frame, n_left);
- }
-
- /*
- * When n_left is set, error is always set to something too.
- * In case error is due to lack of remaining buffers, we go back up and
- * retry.
- * The idea is that it is better to waste some time on packets
- * that have been processed already than dropping them and get
- * more fresh packets with a good likelyhood that they will be dropped too.
- * This technique also gives more time to VM driver to pick-up packets.
- * In case the traffic flows from physical to virtual interfaces, this
- * technique will end-up leveraging the physical NIC buffer in order to
- * absorb the VM's CPU jitter.
- */
- if (n_left && (error == VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF) && retry)
- {
- retry--;
- goto retry;
- }
-
- clib_spinlock_unlock (&rxvq->vring_lock);
-
- if (PREDICT_FALSE (n_left && error != VHOST_USER_TX_FUNC_ERROR_NONE))
- {
- vlib_error_count (vm, node->node_index, error, n_left);
- vlib_increment_simple_counter
- (vnet_main.interface_main.sw_if_counters +
- VNET_INTERFACE_COUNTER_DROP, thread_index, vui->sw_if_index, n_left);
- }
-
- vlib_buffer_free (vm, vlib_frame_vector_args (frame), frame->n_vectors);
- return frame->n_vectors;
-}
-
-VNET_DEVICE_CLASS_TX_FN (vhost_user_device_class) (vlib_main_t * vm,
- vlib_node_runtime_t *
- node, vlib_frame_t * frame)
-{
- u32 *buffers = vlib_frame_vector_args (frame);
- u32 n_left = frame->n_vectors;
- vhost_user_main_t *vum = &vhost_user_main;
- vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
- vhost_user_intf_t *vui =
- pool_elt_at_index (vum->vhost_user_interfaces, rd->dev_instance);
- u32 qid;
- vhost_user_vring_t *rxvq;
- u8 error;
- u32 thread_index = vm->thread_index;
- vhost_cpu_t *cpu = &vum->cpus[thread_index];
- u32 map_hint = 0;
- u8 retry = 8;
- u16 copy_len;
- u16 tx_headers_len;
- u32 or_flags;
- vnet_hw_if_tx_frame_t *tf = vlib_frame_scalar_args (frame);
-
- if (PREDICT_FALSE (!vui->admin_up))
- {
- error = VHOST_USER_TX_FUNC_ERROR_DOWN;
- goto done3;
- }
-
- if (PREDICT_FALSE (!vui->is_ready))
- {
- error = VHOST_USER_TX_FUNC_ERROR_NOT_READY;
- goto done3;
- }
-
- qid = VHOST_VRING_IDX_RX (tf->queue_id);
- rxvq = &vui->vrings[qid];
- ASSERT (tf->queue_id == rxvq->qid);
-
- if (PREDICT_FALSE (rxvq->avail == 0))
- {
- error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
- goto done3;
- }
- if (tf->shared_queue)
- clib_spinlock_lock (&rxvq->vring_lock);
-
- if (vhost_user_is_packed_ring_supported (vui))
- return (vhost_user_device_class_packed (vm, node, frame, vui, rxvq));
-
-retry:
- error = VHOST_USER_TX_FUNC_ERROR_NONE;
- tx_headers_len = 0;
- copy_len = 0;
- while (n_left > 0)
- {
- vlib_buffer_t *b0, *current_b0;
- u16 desc_head, desc_index, desc_len;
- vnet_virtio_vring_desc_t *desc_table;
- uword buffer_map_addr;
- u32 buffer_len;
- u16 bytes_left;
-
- if (PREDICT_TRUE (n_left > 1))
- vlib_prefetch_buffer_with_index (vm, buffers[1], LOAD);
-
- b0 = vlib_get_buffer (vm, buffers[0]);
-
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- cpu->current_trace = vlib_add_trace (vm, node, b0,
- sizeof (*cpu->current_trace));
- vhost_user_tx_trace (cpu->current_trace, vui, qid / 2, b0, rxvq);
- }
-
- if (PREDICT_FALSE (rxvq->last_avail_idx == rxvq->avail->idx))
- {
- error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
- goto done;
- }
-
- desc_table = rxvq->desc;
- desc_head = desc_index =
- rxvq->avail->ring[rxvq->last_avail_idx & rxvq->qsz_mask];
-
- /* Go deeper in case of indirect descriptor
- * I don't know of any driver providing indirect for RX. */
- if (PREDICT_FALSE (rxvq->desc[desc_head].flags & VRING_DESC_F_INDIRECT))
- {
- if (PREDICT_FALSE (rxvq->desc[desc_head].len <
- sizeof (vnet_virtio_vring_desc_t)))
- {
- error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW;
- goto done;
- }
- if (PREDICT_FALSE
- (!(desc_table =
- map_guest_mem (vui, rxvq->desc[desc_index].addr,
- &map_hint))))
- {
- error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
- goto done;
- }
- desc_index = 0;
- }
-
- desc_len = vui->virtio_net_hdr_sz;
- buffer_map_addr = desc_table[desc_index].addr;
- buffer_len = desc_table[desc_index].len;
-
- {
- // Get a header from the header array
- vnet_virtio_net_hdr_mrg_rxbuf_t *hdr =
- &cpu->tx_headers[tx_headers_len];
- tx_headers_len++;
- hdr->hdr.flags = 0;
- hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE;
- hdr->num_buffers = 1; //This is local, no need to check
-
- or_flags = (b0->flags & VNET_BUFFER_F_OFFLOAD);
-
- /* Guest supports csum offload and buffer requires checksum offload? */
- if (or_flags
- && (vui->features & VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_CSUM)))
- vhost_user_handle_tx_offload (vui, b0, &hdr->hdr);
-
- // Prepare a copy order executed later for the header
- ASSERT (copy_len < VHOST_USER_COPY_ARRAY_N);
- vhost_copy_t *cpy = &cpu->copy[copy_len];
- copy_len++;
- cpy->len = vui->virtio_net_hdr_sz;
- cpy->dst = buffer_map_addr;
- cpy->src = (uword) hdr;
- }
-
- buffer_map_addr += vui->virtio_net_hdr_sz;
- buffer_len -= vui->virtio_net_hdr_sz;
- bytes_left = b0->current_length;
- current_b0 = b0;
- while (1)
- {
- if (buffer_len == 0)
- { //Get new output
- if (desc_table[desc_index].flags & VRING_DESC_F_NEXT)
- {
- //Next one is chained
- desc_index = desc_table[desc_index].next;
- buffer_map_addr = desc_table[desc_index].addr;
- buffer_len = desc_table[desc_index].len;
- }
- else if (vui->virtio_net_hdr_sz == 12) //MRG is available
- {
- vnet_virtio_net_hdr_mrg_rxbuf_t *hdr =
- &cpu->tx_headers[tx_headers_len - 1];
-
- //Move from available to used buffer
- rxvq->used->ring[rxvq->last_used_idx & rxvq->qsz_mask].id =
- desc_head;
- rxvq->used->ring[rxvq->last_used_idx & rxvq->qsz_mask].len =
- desc_len;
- vhost_user_log_dirty_ring (vui, rxvq,
- ring[rxvq->last_used_idx &
- rxvq->qsz_mask]);
-
- rxvq->last_avail_idx++;
- rxvq->last_used_idx++;
- hdr->num_buffers++;
- desc_len = 0;
-
- if (PREDICT_FALSE
- (rxvq->last_avail_idx == rxvq->avail->idx))
- {
- //Dequeue queued descriptors for this packet
- rxvq->last_used_idx -= hdr->num_buffers - 1;
- rxvq->last_avail_idx -= hdr->num_buffers - 1;
- error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
- goto done;
- }
-
- desc_table = rxvq->desc;
- desc_head = desc_index =
- rxvq->avail->ring[rxvq->last_avail_idx & rxvq->qsz_mask];
- if (PREDICT_FALSE
- (rxvq->desc[desc_head].flags & VRING_DESC_F_INDIRECT))
- {
- //It is seriously unlikely that a driver will put indirect descriptor
- //after non-indirect descriptor.
- if (PREDICT_FALSE (rxvq->desc[desc_head].len <
- sizeof (vnet_virtio_vring_desc_t)))
- {
- error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW;
- goto done;
- }
- if (PREDICT_FALSE
- (!(desc_table =
- map_guest_mem (vui,
- rxvq->desc[desc_index].addr,
- &map_hint))))
- {
- error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
- goto done;
- }
- desc_index = 0;
- }
- buffer_map_addr = desc_table[desc_index].addr;
- buffer_len = desc_table[desc_index].len;
- }
- else
- {
- error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOMRG;
- goto done;
- }
- }
-
- {
- ASSERT (copy_len < VHOST_USER_COPY_ARRAY_N);
- vhost_copy_t *cpy = &cpu->copy[copy_len];
- copy_len++;
- cpy->len = bytes_left;
- cpy->len = (cpy->len > buffer_len) ? buffer_len : cpy->len;
- cpy->dst = buffer_map_addr;
- cpy->src = (uword) vlib_buffer_get_current (current_b0) +
- current_b0->current_length - bytes_left;
-
- bytes_left -= cpy->len;
- buffer_len -= cpy->len;
- buffer_map_addr += cpy->len;
- desc_len += cpy->len;
-
- clib_prefetch_load (&rxvq->desc);
- }
-
- // Check if vlib buffer has more data. If not, get more or break.
- if (PREDICT_TRUE (!bytes_left))
- {
- if (PREDICT_FALSE
- (current_b0->flags & VLIB_BUFFER_NEXT_PRESENT))
- {
- current_b0 = vlib_get_buffer (vm, current_b0->next_buffer);
- bytes_left = current_b0->current_length;
- }
- else
- {
- //End of packet
- break;
- }
- }
- }
-
- //Move from available to used ring
- rxvq->used->ring[rxvq->last_used_idx & rxvq->qsz_mask].id = desc_head;
- rxvq->used->ring[rxvq->last_used_idx & rxvq->qsz_mask].len = desc_len;
- vhost_user_log_dirty_ring (vui, rxvq,
- ring[rxvq->last_used_idx & rxvq->qsz_mask]);
- rxvq->last_avail_idx++;
- rxvq->last_used_idx++;
-
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- cpu->current_trace->hdr = cpu->tx_headers[tx_headers_len - 1];
- }
-
- n_left--; //At the end for error counting when 'goto done' is invoked
-
- /*
- * Do the copy periodically to prevent
- * cpu->copy array overflow and corrupt memory
- */
- if (PREDICT_FALSE (copy_len >= VHOST_USER_TX_COPY_THRESHOLD))
- {
- if (PREDICT_FALSE (vhost_user_tx_copy (vui, cpu->copy, copy_len,
- &map_hint)))
- {
- vlib_error_count (vm, node->node_index,
- VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL, 1);
- }
- copy_len = 0;
-
- /* give buffers back to driver */
- CLIB_MEMORY_BARRIER ();
- rxvq->used->idx = rxvq->last_used_idx;
- vhost_user_log_dirty_ring (vui, rxvq, idx);
- }
- buffers++;
- }
-
-done:
- //Do the memory copies
- if (PREDICT_FALSE (vhost_user_tx_copy (vui, cpu->copy, copy_len,
- &map_hint)))
- {
- vlib_error_count (vm, node->node_index,
- VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL, 1);
- }
-
- CLIB_MEMORY_BARRIER ();
- rxvq->used->idx = rxvq->last_used_idx;
- vhost_user_log_dirty_ring (vui, rxvq, idx);
-
- /*
- * When n_left is set, error is always set to something too.
- * In case error is due to lack of remaining buffers, we go back up and
- * retry.
- * The idea is that it is better to waste some time on packets
- * that have been processed already than dropping them and get
- * more fresh packets with a good likelihood that they will be dropped too.
- * This technique also gives more time to VM driver to pick-up packets.
- * In case the traffic flows from physical to virtual interfaces, this
- * technique will end-up leveraging the physical NIC buffer in order to
- * absorb the VM's CPU jitter.
- */
- if (n_left && (error == VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF) && retry)
- {
- retry--;
- goto retry;
- }
-
- /* interrupt (call) handling */
- if ((rxvq->callfd_idx != ~0) &&
- !(rxvq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
- {
- rxvq->n_since_last_int += frame->n_vectors - n_left;
-
- if (rxvq->n_since_last_int > vum->coalesce_frames)
- vhost_user_send_call (vm, vui, rxvq);
- }
-
- clib_spinlock_unlock (&rxvq->vring_lock);
-
-done3:
- if (PREDICT_FALSE (n_left && error != VHOST_USER_TX_FUNC_ERROR_NONE))
- {
- vlib_error_count (vm, node->node_index, error, n_left);
- vlib_increment_simple_counter
- (vnet_main.interface_main.sw_if_counters
- + VNET_INTERFACE_COUNTER_DROP,
- thread_index, vui->sw_if_index, n_left);
- }
-
- vlib_buffer_free (vm, vlib_frame_vector_args (frame), frame->n_vectors);
- return frame->n_vectors;
-}
-
-static __clib_unused clib_error_t *
-vhost_user_interface_rx_mode_change (vnet_main_t * vnm, u32 hw_if_index,
- u32 qid, vnet_hw_if_rx_mode mode)
-{
- vlib_main_t *vm = vnm->vlib_main;
- vnet_hw_interface_t *hif = vnet_get_hw_interface (vnm, hw_if_index);
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui =
- pool_elt_at_index (vum->vhost_user_interfaces, hif->dev_instance);
- vhost_user_vring_t *txvq = &vui->vrings[VHOST_VRING_IDX_TX (qid)];
- vhost_cpu_t *cpu;
-
- if (mode == txvq->mode)
- return 0;
-
- if ((mode != VNET_HW_IF_RX_MODE_POLLING) &&
- (mode != VNET_HW_IF_RX_MODE_ADAPTIVE) &&
- (mode != VNET_HW_IF_RX_MODE_INTERRUPT))
- {
- vu_log_err (vui, "unhandled mode %d changed for if %d queue %d", mode,
- hw_if_index, qid);
- return clib_error_return (0, "unsupported");
- }
-
- if (txvq->thread_index == ~0)
- return clib_error_return (0, "Queue initialization is not finished yet");
-
- cpu = vec_elt_at_index (vum->cpus, txvq->thread_index);
- if ((mode == VNET_HW_IF_RX_MODE_INTERRUPT) ||
- (mode == VNET_HW_IF_RX_MODE_ADAPTIVE))
- {
- if (txvq->kickfd_idx == ~0)
- {
- // We cannot support interrupt mode if the driver opts out
- return clib_error_return (0, "Driver does not support interrupt");
- }
- if (txvq->mode == VNET_HW_IF_RX_MODE_POLLING)
- {
- ASSERT (cpu->polling_q_count != 0);
- if (cpu->polling_q_count)
- cpu->polling_q_count--;
- vum->ifq_count++;
- // Start the timer if this is the first encounter on interrupt
- // interface/queue
- if ((vum->ifq_count == 1) &&
- ((vum->coalesce_time > 0.0) || (vum->coalesce_frames > 0)))
- vlib_process_signal_event (vm,
- vhost_user_send_interrupt_node.index,
- VHOST_USER_EVENT_START_TIMER, 0);
- }
- }
- else if (mode == VNET_HW_IF_RX_MODE_POLLING)
- {
- if (((txvq->mode == VNET_HW_IF_RX_MODE_INTERRUPT) ||
- (txvq->mode == VNET_HW_IF_RX_MODE_ADAPTIVE)) && vum->ifq_count)
- {
- cpu->polling_q_count++;
- vum->ifq_count--;
- // Stop the timer if there is no more interrupt interface/queue
- if (vum->ifq_count == 0)
- vlib_process_signal_event (vm,
- vhost_user_send_interrupt_node.index,
- VHOST_USER_EVENT_STOP_TIMER, 0);
- }
- }
-
- txvq->mode = mode;
- vhost_user_set_operation_mode (vui, txvq);
-
- return 0;
-}
-
-static __clib_unused clib_error_t *
-vhost_user_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index,
- u32 flags)
-{
- vnet_hw_interface_t *hif = vnet_get_hw_interface (vnm, hw_if_index);
- vhost_user_main_t *vum = &vhost_user_main;
- vhost_user_intf_t *vui =
- pool_elt_at_index (vum->vhost_user_interfaces, hif->dev_instance);
- u8 link_old, link_new;
-
- link_old = vui_is_link_up (vui);
-
- vui->admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
-
- link_new = vui_is_link_up (vui);
-
- if (link_old != link_new)
- vnet_hw_interface_set_flags (vnm, vui->hw_if_index, link_new ?
- VNET_HW_INTERFACE_FLAG_LINK_UP : 0);
-
- return /* no error */ 0;
-}
-
-/* *INDENT-OFF* */
-VNET_DEVICE_CLASS (vhost_user_device_class) = {
- .name = "vhost-user",
- .tx_function_n_errors = VHOST_USER_TX_FUNC_N_ERROR,
- .tx_function_error_strings = vhost_user_tx_func_error_strings,
- .format_device_name = format_vhost_user_interface_name,
- .name_renumber = vhost_user_name_renumber,
- .admin_up_down_function = vhost_user_interface_admin_up_down,
- .rx_mode_change_function = vhost_user_interface_rx_mode_change,
- .format_tx_trace = format_vhost_trace,
-};
-
-/* *INDENT-ON* */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */