diff options
Diffstat (limited to 'src/vnet/devices/virtio')
| -rw-r--r-- | src/vnet/devices/virtio/vhost_user.c | 459 | ||||
| -rw-r--r-- | src/vnet/devices/virtio/vhost_user.h | 11 | ||||
| -rw-r--r-- | src/vnet/devices/virtio/vhost_user_api.c | 3 |
3 files changed, 259 insertions, 214 deletions
diff --git a/src/vnet/devices/virtio/vhost_user.c b/src/vnet/devices/virtio/vhost_user.c index d13ea3beab3..1d52b42b73b 100644 --- a/src/vnet/devices/virtio/vhost_user.c +++ b/src/vnet/devices/virtio/vhost_user.c @@ -116,12 +116,13 @@ unmap_all_mem_regions (vhost_user_intf_t * vui) } } -static void +static_always_inline void vhost_user_tx_thread_placement (vhost_user_intf_t * vui) { //Let's try to assign one queue to each thread - u32 qid = 0; + u32 qid; u32 thread_index = 0; + vui->use_tx_spinlock = 0; while (1) { @@ -156,67 +157,27 @@ vhost_user_tx_thread_placement (vhost_user_intf_t * vui) * @brief Unassign existing interface/queue to thread mappings and re-assign * new interface/queue to thread mappings */ -static void -vhost_user_rx_thread_placement () +static_always_inline void +vhost_user_rx_thread_placement (vhost_user_intf_t * vui, u32 qid) { - vhost_user_main_t *vum = &vhost_user_main; - vhost_user_intf_t *vui; - vhost_user_vring_t *txvq; + vhost_user_vring_t *txvq = &vui->vrings[qid]; vnet_main_t *vnm = vnet_get_main (); - u32 qid; int rv; - u16 *queue; - - // Scrap all existing mappings for all interfaces/queues - /* *INDENT-OFF* */ - pool_foreach (vui, vum->vhost_user_interfaces, { - vec_foreach (queue, vui->rx_queues) - { - rv = vnet_hw_interface_unassign_rx_thread (vnm, vui->hw_if_index, - *queue); - if (rv) - vu_log_warn (vui, "unable to unassign interface %d, " - "queue %d: rc=%d", vui->hw_if_index, *queue, rv); - } - vec_reset_length (vui->rx_queues); - }); - /* *INDENT-ON* */ - - // Create the rx_queues for all interfaces - /* *INDENT-OFF* */ - pool_foreach (vui, vum->vhost_user_interfaces, { - for (qid = 0; qid < VHOST_VRING_MAX_N / 2; qid++) - { - txvq = &vui->vrings[VHOST_VRING_IDX_TX (qid)]; - if (txvq->started) - { - if (txvq->mode == VNET_HW_INTERFACE_RX_MODE_UNKNOWN) - /* Set polling as the default */ - txvq->mode = VNET_HW_INTERFACE_RX_MODE_POLLING; - vec_add1 (vui->rx_queues, qid); - } - } - }); - /* *INDENT-ON* */ - - // Assign new mappings for all interfaces/queues - /* *INDENT-OFF* */ - pool_foreach (vui, vum->vhost_user_interfaces, { - vnet_hw_interface_set_input_node (vnm, vui->hw_if_index, - vhost_user_input_node.index); - vec_foreach (queue, vui->rx_queues) - { - vnet_hw_interface_assign_rx_thread (vnm, vui->hw_if_index, *queue, - ~0); - txvq = &vui->vrings[VHOST_VRING_IDX_TX (*queue)]; - rv = vnet_hw_interface_set_rx_mode (vnm, vui->hw_if_index, *queue, - txvq->mode); - if (rv) - vu_log_warn (vui, "unable to set rx mode for interface %d, " - "queue %d: rc=%d", vui->hw_if_index, *queue, rv); - } - }); - /* *INDENT-ON* */ + u32 q = qid >> 1; + + ASSERT ((qid & 1) == 1); // should be odd + // Assign new queue mappings for the interface + vnet_hw_interface_set_input_node (vnm, vui->hw_if_index, + vhost_user_input_node.index); + vnet_hw_interface_assign_rx_thread (vnm, vui->hw_if_index, q, ~0); + if (txvq->mode == VNET_HW_INTERFACE_RX_MODE_UNKNOWN) + /* Set polling as the default */ + txvq->mode = VNET_HW_INTERFACE_RX_MODE_POLLING; + txvq->qid = q; + rv = vnet_hw_interface_set_rx_mode (vnm, vui->hw_if_index, q, 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); } /** @brief Returns whether at least one TX and one RX vring are enabled */ @@ -232,7 +193,7 @@ vhost_user_intf_ready (vhost_user_intf_t * vui) return found[0] && found[1]; } -static void +static_always_inline void vhost_user_update_iface_state (vhost_user_intf_t * vui) { /* if we have pointers to descriptor table, go up */ @@ -247,8 +208,6 @@ vhost_user_update_iface_state (vhost_user_intf_t * vui) : 0); vui->is_ready = is_ready; } - vhost_user_rx_thread_placement (); - vhost_user_tx_thread_placement (vui); } static void @@ -278,6 +237,18 @@ vhost_user_callfd_read_ready (clib_file_t * uf) 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].qid == -1) + vhost_user_rx_thread_placement (vui, qid); + } + else + vhost_user_tx_thread_placement (vui); +} + static clib_error_t * vhost_user_kickfd_read_ready (clib_file_t * uf) { @@ -293,10 +264,12 @@ vhost_user_kickfd_read_ready (clib_file_t * uf) if (!vui->vrings[qid].started || (vhost_user_intf_ready (vui) != vui->is_ready)) { - vlib_worker_thread_barrier_sync (vlib_get_main ()); - vui->vrings[qid].started = 1; - vhost_user_update_iface_state (vui); - vlib_worker_thread_barrier_release (vlib_get_main ()); + if (vui->vrings[qid].started == 0) + { + vui->vrings[qid].started = 1; + vhost_user_thread_placement (vui, qid); + vhost_user_update_iface_state (vui); + } } vhost_user_set_interrupt_pending (vui, uf->private_data); @@ -311,6 +284,7 @@ vhost_user_vring_init (vhost_user_intf_t * vui, u32 qid) vring->kickfd_idx = ~0; vring->callfd_idx = ~0; vring->errfd = -1; + vring->qid = -1; /* * We have a bug with some qemu 2.5, and this may be a fix. @@ -329,6 +303,7 @@ 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, @@ -348,7 +323,12 @@ vhost_user_vring_close (vhost_user_intf_t * vui, u32 qid) close (vring->errfd); vring->errfd = -1; } + + // save the qid so that we don't need to unassign and assign_rx_thread + // when the interface comes back up. They are expensive calls. + u16 q = vui->vrings[qid].qid; vhost_user_vring_init (vui, qid); + vui->vrings[qid].qid = q; } static_always_inline void @@ -377,7 +357,7 @@ vhost_user_if_disconnect (vhost_user_intf_t * vui) static clib_error_t * vhost_user_socket_read (clib_file_t * uf) { - int n, i; + int n, i, j; int fd, number_of_fds = 0; int fds[VHOST_MEMORY_MAX_NREGIONS]; vhost_user_msg_t msg; @@ -389,6 +369,7 @@ vhost_user_socket_read (clib_file_t * uf) 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); @@ -411,9 +392,6 @@ vhost_user_socket_read (clib_file_t * uf) n = recvmsg (uf->file_descriptor, &mh, 0); - /* Stop workers to avoid end of the world */ - vlib_worker_thread_barrier_sync (vlib_get_main ()); - if (n != VHOST_USER_MSG_HDR_SZ) { if (n == -1) @@ -488,6 +466,13 @@ vhost_user_socket_read (clib_file_t * uf) 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: @@ -509,10 +494,6 @@ vhost_user_socket_read (clib_file_t * uf) ASSERT (vui->virtio_net_hdr_sz < VLIB_BUFFER_PRE_DATA_SIZE); vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0); vui->is_ready = 0; - - /*for (q = 0; q < VHOST_VRING_MAX_N; q++) - vhost_user_vring_close(&vui->vrings[q]); */ - break; case VHOST_USER_SET_MEM_TABLE: @@ -522,10 +503,8 @@ vhost_user_socket_read (clib_file_t * uf) 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; } @@ -534,39 +513,50 @@ vhost_user_socket_read (clib_file_t * uf) vu_log_debug (vui, "each memory region must have FD"); goto close_socket; } - unmap_all_mem_regions (vui); + + /* Do the mmap without barrier sync */ + void *region_mmap_addr[VHOST_MEMORY_MAX_NREGIONS]; for (i = 0; i < msg.memory.nregions; i++) { - clib_memcpy_fast (&(vui->regions[i]), &msg.memory.regions[i], - sizeof (vhost_user_memory_region_t)); - long page_sz = get_huge_page_size (fds[i]); /* align size to page */ - ssize_t map_sz = (vui->regions[i].memory_size + - vui->regions[i].mmap_offset + + ssize_t map_sz = (msg.memory.regions[i].memory_size + + msg.memory.regions[i].mmap_offset + page_sz - 1) & ~(page_sz - 1); - vui->region_mmap_addr[i] = mmap (0, map_sz, PROT_READ | PROT_WRITE, - MAP_SHARED, fds[i], 0); - 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; - - 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], - vui->region_mmap_addr[i], page_sz); - - if (vui->region_mmap_addr[i] == MAP_FAILED) + 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++; } + vlib_worker_thread_barrier_release (vm); break; case VHOST_USER_SET_VRING_NUM: @@ -598,22 +588,22 @@ vhost_user_socket_read (clib_file_t * uf) goto close_socket; } - vui->vrings[msg.state.index].desc = (vring_desc_t *) - map_user_mem (vui, msg.addr.desc_user_addr); - vui->vrings[msg.state.index].used = (vring_used_t *) - map_user_mem (vui, msg.addr.used_user_addr); - vui->vrings[msg.state.index].avail = (vring_avail_t *) - map_user_mem (vui, msg.addr.avail_user_addr); + vring_desc_t *desc = map_user_mem (vui, msg.addr.desc_user_addr); + vring_used_t *used = map_user_mem (vui, msg.addr.used_user_addr); + vring_avail_t *avail = map_user_mem (vui, msg.addr.avail_user_addr); - if ((vui->vrings[msg.state.index].desc == NULL) || - (vui->vrings[msg.state.index].used == NULL) || - (vui->vrings[msg.state.index].avail == NULL)) + 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; } + 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; @@ -621,9 +611,7 @@ vhost_user_socket_read (clib_file_t * uf) /* Spec says: If VHOST_USER_F_PROTOCOL_FEATURES has not been negotiated, the ring is initialized in an enabled state. */ if (!(vui->features & (1 << FEAT_VHOST_USER_F_PROTOCOL_FEATURES))) - { - vui->vrings[msg.state.index].enabled = 1; - } + vui->vrings[msg.state.index].enabled = 1; vui->vrings[msg.state.index].last_used_idx = vui->vrings[msg.state.index].last_avail_idx = @@ -631,6 +619,8 @@ vhost_user_socket_read (clib_file_t * uf) /* tell driver that we don't want interrupts */ vui->vrings[msg.state.index].used->flags = VRING_USED_F_NO_NOTIFY; + vlib_worker_thread_barrier_release (vm); + vhost_user_update_iface_state (vui); break; case VHOST_USER_SET_OWNER: @@ -709,8 +699,9 @@ vhost_user_socket_read (clib_file_t * uf) //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: @@ -731,14 +722,14 @@ vhost_user_socket_read (clib_file_t * uf) } 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 %d", vui->hw_if_index, msg.state.index, msg.state.num); - + vlib_worker_thread_barrier_sync (vm); vui->vrings[msg.state.index].last_avail_idx = msg.state.num; + vlib_worker_thread_barrier_release (vm); break; case VHOST_USER_GET_VRING_BASE: @@ -749,6 +740,8 @@ vhost_user_socket_read (clib_file_t * uf) 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 @@ -757,68 +750,84 @@ vhost_user_socket_read (clib_file_t * uf) msg.flags |= 4; msg.size = sizeof (msg.state); - /* Spec says: Client must [...] stop ring upon receiving VHOST_USER_GET_VRING_BASE. */ + /* + * 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 %d", 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; - } + vu_log_debug (vui, "if %d msg VHOST_USER_SET_LOG_BASE", + vui->hw_if_index); - 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; - } + 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; + } - 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); + 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; + } - vui->log_base_addr = mmap (0, map_sz, PROT_READ | PROT_WRITE, - MAP_SHARED, fd, 0); + 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); - 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, - vui->log_base_addr); + void *log_base_addr = mmap (0, map_sz, PROT_READ | PROT_WRITE, + MAP_SHARED, fd, 0); - if (vui->log_base_addr == MAP_FAILED) - { - vu_log_err (vui, "failed to map memory. errno is %d", errno); - goto close_socket; - } + 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); - vui->log_base_addr += msg.log.offset; - vui->log_size = msg.log.size; + if (log_base_addr == MAP_FAILED) + { + vu_log_err (vui, "failed to map memory. errno is %d", errno); + goto close_socket; + } - msg.flags |= 4; - msg.size = sizeof (msg.u64); + 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); - break; - } + 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: @@ -828,14 +837,19 @@ vhost_user_socket_read (clib_file_t * uf) 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: @@ -844,6 +858,13 @@ vhost_user_socket_read (clib_file_t * uf) 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: @@ -858,6 +879,8 @@ vhost_user_socket_read (clib_file_t * uf) } 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: @@ -866,26 +889,13 @@ vhost_user_socket_read (clib_file_t * uf) goto close_socket; } - /* if we need to reply */ - if (msg.flags & 4) - { - 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); - vlib_worker_thread_barrier_release (vlib_get_main ()); 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); - vlib_worker_thread_barrier_release (vlib_get_main ()); return 0; } @@ -900,7 +910,6 @@ vhost_user_socket_error (clib_file_t * uf) vu_log_debug (vui, "socket error on if %d", vui->sw_if_index); vlib_worker_thread_barrier_sync (vm); vhost_user_if_disconnect (vui); - vhost_user_rx_thread_placement (); vlib_worker_thread_barrier_release (vm); return 0; } @@ -984,7 +993,7 @@ vhost_user_send_interrupt_process (vlib_main_t * vm, f64 timeout = 3153600000.0 /* 100 years */ ; uword event_type, *event_data = 0; vhost_user_main_t *vum = &vhost_user_main; - u16 *queue; + u16 qid; f64 now, poll_time_remaining; f64 next_timeout; u8 stop_timer = 0; @@ -1022,13 +1031,13 @@ vhost_user_send_interrupt_process (vlib_main_t * vm, /* *INDENT-OFF* */ pool_foreach (vui, vum->vhost_user_interfaces, { next_timeout = timeout; - vec_foreach (queue, vui->rx_queues) + for (qid = 0; qid < VHOST_VRING_MAX_N / 2; qid += 2) { - vhost_user_vring_t *rxvq = - &vui->vrings[VHOST_VRING_IDX_RX (*queue)]; - vhost_user_vring_t *txvq = - &vui->vrings[VHOST_VRING_IDX_TX (*queue)]; + vhost_user_vring_t *rxvq = &vui->vrings[qid]; + vhost_user_vring_t *txvq = &vui->vrings[qid + 1]; + if (txvq->qid == -1) + continue; if (txvq->n_since_last_int) { if (now >= txvq->int_deadline) @@ -1196,6 +1205,24 @@ vhost_user_term_if (vhost_user_intf_t * vui) for (q = 0; q < VHOST_VRING_MAX_N; q++) { + // Remove existing queue mapping for the interface + if (q & 1) + { + int rv; + vnet_main_t *vnm = vnet_get_main (); + vhost_user_vring_t *txvq = &vui->vrings[q]; + + if (txvq->qid != -1) + { + rv = vnet_hw_interface_unassign_rx_thread (vnm, + vui->hw_if_index, + q >> 1); + if (rv) + vu_log_warn (vui, "unable to unassign interface %d, " + "queue %d: rc=%d", vui->hw_if_index, q >> 1, rv); + } + } + clib_mem_free ((void *) vui->vring_locks[q]); } @@ -1220,7 +1247,7 @@ vhost_user_delete_if (vnet_main_t * vnm, vlib_main_t * vm, u32 sw_if_index) vhost_user_intf_t *vui; int rv = 0; vnet_hw_interface_t *hwif; - u16 *queue; + u16 qid; if (!(hwif = vnet_get_sup_hw_interface (vnm, sw_if_index)) || hwif->dev_class_index != vhost_user_device_class.index) @@ -1231,27 +1258,28 @@ vhost_user_delete_if (vnet_main_t * vnm, vlib_main_t * vm, u32 sw_if_index) vu_log_debug (vui, "Deleting vhost-user interface %s (instance %d)", hwif->name, hwif->dev_instance); - vec_foreach (queue, vui->rx_queues) - { - vhost_user_vring_t *txvq; + for (qid = 1; qid < VHOST_VRING_MAX_N / 2; qid += 2) + { + vhost_user_vring_t *txvq = &vui->vrings[qid]; - txvq = &vui->vrings[VHOST_VRING_IDX_TX (*queue)]; - if ((vum->ifq_count > 0) && - ((txvq->mode == VNET_HW_INTERFACE_RX_MODE_INTERRUPT) || - (txvq->mode == VNET_HW_INTERFACE_RX_MODE_ADAPTIVE))) - { - vum->ifq_count--; - // Stop the timer if there is no more interrupt interface/queue - if ((vum->ifq_count == 0) && - (vum->coalesce_time > 0.0) && (vum->coalesce_frames > 0)) - { - vlib_process_signal_event (vm, - vhost_user_send_interrupt_node.index, - VHOST_USER_EVENT_STOP_TIMER, 0); - break; - } - } - } + if (txvq->qid == -1) + continue; + if ((vum->ifq_count > 0) && + ((txvq->mode == VNET_HW_INTERFACE_RX_MODE_INTERRUPT) || + (txvq->mode == VNET_HW_INTERFACE_RX_MODE_ADAPTIVE))) + { + vum->ifq_count--; + // Stop the timer if there is no more interrupt interface/queue + if ((vum->ifq_count == 0) && + (vum->coalesce_time > 0.0) && (vum->coalesce_frames > 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); @@ -1467,12 +1495,16 @@ vhost_user_create_if (vnet_main_t * vnm, vlib_main_t * vm, } } + /* 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, hwaddr); + vlib_worker_thread_barrier_release (vm); + vhost_user_vui_init (vnm, vui, server_sock_fd, sock_filename, feature_mask, &sw_if_idx); vnet_sw_interface_set_mtu (vnm, vui->sw_if_index, 9000); + vhost_user_rx_thread_placement (vui, 1); if (renumber) vnet_interface_name_renumber (sw_if_idx, custom_dev_instance); @@ -1711,7 +1743,7 @@ show_vhost_user_command_fn (vlib_main_t * vm, vhost_user_intf_t *vui; u32 hw_if_index, *hw_if_indices = 0; vnet_hw_interface_t *hi; - u16 *queue; + u16 qid; u32 ci; int i, j, q; int show_descr = 0; @@ -1818,20 +1850,24 @@ show_vhost_user_command_fn (vlib_main_t * vm, vlib_cli_output (vm, " rx placement: "); - vec_foreach (queue, vui->rx_queues) - { - vnet_main_t *vnm = vnet_get_main (); - uword thread_index; - vnet_hw_interface_rx_mode mode; - - thread_index = vnet_get_device_input_thread_index (vnm, - vui->hw_if_index, - *queue); - vnet_hw_interface_get_rx_mode (vnm, vui->hw_if_index, *queue, &mode); - vlib_cli_output (vm, " thread %d on vring %d, %U\n", - thread_index, VHOST_VRING_IDX_TX (*queue), - format_vnet_hw_interface_rx_mode, mode); - } + for (qid = 1; qid < VHOST_VRING_MAX_N / 2; qid += 2) + { + vnet_main_t *vnm = vnet_get_main (); + uword thread_index; + vnet_hw_interface_rx_mode mode; + vhost_user_vring_t *txvq = &vui->vrings[qid]; + + if (txvq->qid == -1) + continue; + thread_index = + vnet_get_device_input_thread_index (vnm, vui->hw_if_index, + qid >> 1); + vnet_hw_interface_get_rx_mode (vnm, vui->hw_if_index, qid >> 1, + &mode); + vlib_cli_output (vm, " thread %d on vring %d, %U\n", + thread_index, qid, + format_vnet_hw_interface_rx_mode, mode); + } vlib_cli_output (vm, " tx placement: %s\n", vui->use_tx_spinlock ? "spin-lock" : "lock-free"); @@ -1986,6 +2022,7 @@ VLIB_CLI_COMMAND (vhost_user_connect_command, static) = { .short_help = "create vhost-user socket <socket-filename> [server] " "[feature-mask <hex>] [hwaddr <mac-addr>] [renumber <dev_instance>] ", .function = vhost_user_connect_command_fn, + .is_mp_safe = 1, }; /* *INDENT-ON* */ diff --git a/src/vnet/devices/virtio/vhost_user.h b/src/vnet/devices/virtio/vhost_user.h index f2ed2dffd46..7dadfed2334 100644 --- a/src/vnet/devices/virtio/vhost_user.h +++ b/src/vnet/devices/virtio/vhost_user.h @@ -250,6 +250,14 @@ typedef struct /* 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; } vhost_user_vring_t; #define VHOST_USER_EVENT_START_TIMER 1 @@ -293,9 +301,6 @@ typedef struct /* Whether to use spinlock or per_cpu_tx_qid assignment */ u8 use_tx_spinlock; u16 *per_cpu_tx_qid; - - /* Vector of active rx queues for this interface */ - u16 *rx_queues; } vhost_user_intf_t; typedef struct diff --git a/src/vnet/devices/virtio/vhost_user_api.c b/src/vnet/devices/virtio/vhost_user_api.c index b8d89a07cbc..acfb3e089f4 100644 --- a/src/vnet/devices/virtio/vhost_user_api.c +++ b/src/vnet/devices/virtio/vhost_user_api.c @@ -244,6 +244,9 @@ vhost_user_api_hookup (vlib_main_t * vm) foreach_vpe_api_msg; #undef _ + /* Mark CREATE_VHOST_USER_IF as mp safe */ + am->is_mp_safe[VL_API_CREATE_VHOST_USER_IF] = 1; + /* * Set up the (msg_name, crc, message-id) table */ |