diff options
Diffstat (limited to 'src/plugins/memif/memif.c')
| -rw-r--r-- | src/plugins/memif/memif.c | 819 |
1 files changed, 819 insertions, 0 deletions
diff --git a/src/plugins/memif/memif.c b/src/plugins/memif/memif.c new file mode 100644 index 00000000..a3be49fa --- /dev/null +++ b/src/plugins/memif/memif.c @@ -0,0 +1,819 @@ +/* + *------------------------------------------------------------------ + * Copyright (c) 2017 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. + *------------------------------------------------------------------ + */ + + +#define _GNU_SOURCE +#include <stdint.h> +#include <net/if.h> +#include <sys/types.h> +#include <fcntl.h> +#include <sys/ioctl.h> +#include <sys/socket.h> +#include <sys/un.h> +#include <sys/uio.h> +#include <sys/mman.h> +#include <sys/prctl.h> +#include <sys/eventfd.h> +#include <inttypes.h> +#include <limits.h> + +#include <vlib/vlib.h> +#include <vlib/unix/unix.h> +#include <vppinfra/linux/syscall.h> +#include <vnet/plugin/plugin.h> +#include <vnet/ethernet/ethernet.h> +#include <vpp/app/version.h> +#include <memif/memif.h> +#include <memif/private.h> + +memif_main_t memif_main; + +static u32 +memif_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi, u32 flags) +{ + /* nothing for now */ + return 0; +} + +static void +memif_queue_intfd_close (memif_queue_t * mq) +{ + if (mq->int_clib_file_index != ~0) + { + memif_file_del_by_index (mq->int_clib_file_index); + mq->int_clib_file_index = ~0; + mq->int_fd = -1; + } + else if (mq->int_fd > -1) + { + close (mq->int_fd); + mq->int_fd = -1; + } +} + +void +memif_disconnect (memif_if_t * mif, clib_error_t * err) +{ + memif_main_t *mm = &memif_main; + vnet_main_t *vnm = vnet_get_main (); + memif_region_t *mr; + memif_queue_t *mq; + int i; + + if (mif == 0) + return; + + DBG ("disconnect %u (%v)", mif->dev_instance, err ? err->what : 0); + + if (err) + { + clib_error_t *e = 0; + mif->local_disc_string = vec_dup (err->what); + if (mif->conn_fd > -1) + e = memif_msg_send_disconnect (mif, err); + clib_error_free (e); + } + + /* set interface down */ + mif->flags &= ~(MEMIF_IF_FLAG_CONNECTED | MEMIF_IF_FLAG_CONNECTING); + if (mif->hw_if_index != ~0) + vnet_hw_interface_set_flags (vnm, mif->hw_if_index, 0); + + /* close connection socket */ + if (mif->conn_clib_file_index != ~0) + { + memif_socket_file_t *msf = vec_elt_at_index (mm->socket_files, + mif->socket_file_index); + hash_unset (msf->dev_instance_by_fd, mif->conn_fd); + memif_file_del_by_index (mif->conn_clib_file_index); + mif->conn_clib_file_index = ~0; + } + else if (mif->conn_fd > -1) + close (mif->conn_fd); + mif->conn_fd = -1; + + vec_foreach_index (i, mif->rx_queues) + { + mq = vec_elt_at_index (mif->rx_queues, i); + if (mq->ring) + { + int rv; + rv = vnet_hw_interface_unassign_rx_thread (vnm, mif->hw_if_index, i); + if (rv) + DBG ("Warning: unable to unassign interface %d, " + "queue %d: rc=%d", mif->hw_if_index, i, rv); + mq->ring = 0; + } + } + + /* free tx and rx queues */ + vec_foreach (mq, mif->rx_queues) memif_queue_intfd_close (mq); + vec_free (mif->rx_queues); + + vec_foreach (mq, mif->tx_queues) memif_queue_intfd_close (mq); + vec_free (mif->tx_queues); + + /* free memory regions */ + vec_foreach (mr, mif->regions) + { + int rv; + if ((rv = munmap (mr->shm, mr->region_size))) + clib_warning ("munmap failed, rv = %d", rv); + if (mr->fd > -1) + close (mr->fd); + } + vec_free (mif->regions); + + mif->remote_pid = 0; + vec_free (mif->remote_name); + vec_free (mif->remote_if_name); + clib_fifo_free (mif->msg_queue); +} + +static clib_error_t * +memif_int_fd_read_ready (clib_file_t * uf) +{ + memif_main_t *mm = &memif_main; + vnet_main_t *vnm = vnet_get_main (); + u16 qid = uf->private_data & 0xFFFF; + memif_if_t *mif = vec_elt_at_index (mm->interfaces, uf->private_data >> 16); + memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, qid); + u64 b; + ssize_t size; + + size = read (uf->file_descriptor, &b, sizeof (b)); + if (size < 0) + { + DBG_UNIX_LOG ("Failed to read from socket"); + return 0; + } + + vnet_device_input_set_interrupt_pending (vnm, mif->hw_if_index, qid); + mq->int_count++; + + return 0; +} + + +clib_error_t * +memif_connect (memif_if_t * mif) +{ + vnet_main_t *vnm = vnet_get_main (); + clib_file_t template = { 0 }; + memif_region_t *mr; + int i; + + DBG ("connect %u", mif->dev_instance); + + vec_free (mif->local_disc_string); + vec_free (mif->remote_disc_string); + + vec_foreach (mr, mif->regions) + { + if (mr->shm) + continue; + + if (mr->fd < 0) + clib_error_return (0, "no memory region fd"); + + if ((mr->shm = mmap (NULL, mr->region_size, PROT_READ | PROT_WRITE, + MAP_SHARED, mr->fd, 0)) == MAP_FAILED) + return clib_error_return_unix (0, "mmap"); + } + + template.read_function = memif_int_fd_read_ready; + + vec_foreach_index (i, mif->tx_queues) + { + memif_queue_t *mq = vec_elt_at_index (mif->tx_queues, i); + + mq->ring = mif->regions[mq->region].shm + mq->offset; + if (mq->ring->cookie != MEMIF_COOKIE) + return clib_error_return (0, "wrong cookie on tx ring %u", i); + } + + vec_foreach_index (i, mif->rx_queues) + { + memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, i); + int rv; + + mq->ring = mif->regions[mq->region].shm + mq->offset; + if (mq->ring->cookie != MEMIF_COOKIE) + return clib_error_return (0, "wrong cookie on tx ring %u", i); + + if (mq->int_fd > -1) + { + template.file_descriptor = mq->int_fd; + template.private_data = (mif->dev_instance << 16) | (i & 0xFFFF); + memif_file_add (&mq->int_clib_file_index, &template); + } + vnet_hw_interface_assign_rx_thread (vnm, mif->hw_if_index, i, ~0); + rv = vnet_hw_interface_set_rx_mode (vnm, mif->hw_if_index, i, + VNET_HW_INTERFACE_RX_MODE_DEFAULT); + if (rv) + clib_warning + ("Warning: unable to set rx mode for interface %d queue %d: " + "rc=%d", mif->hw_if_index, i, rv); + else + { + vnet_hw_interface_rx_mode rxmode; + vnet_hw_interface_get_rx_mode (vnm, mif->hw_if_index, i, &rxmode); + + if (rxmode == VNET_HW_INTERFACE_RX_MODE_POLLING) + mq->ring->flags |= MEMIF_RING_FLAG_MASK_INT; + } + } + + mif->flags &= ~MEMIF_IF_FLAG_CONNECTING; + mif->flags |= MEMIF_IF_FLAG_CONNECTED; + + vnet_hw_interface_set_flags (vnm, mif->hw_if_index, + VNET_HW_INTERFACE_FLAG_LINK_UP); + return 0; +} + +static_always_inline memif_ring_t * +memif_get_ring (memif_if_t * mif, memif_ring_type_t type, u16 ring_num) +{ + if (vec_len (mif->regions) == 0) + return NULL; + void *p = mif->regions[0].shm; + int ring_size = + sizeof (memif_ring_t) + + sizeof (memif_desc_t) * (1 << mif->run.log2_ring_size); + p += (ring_num + type * mif->run.num_s2m_rings) * ring_size; + + return (memif_ring_t *) p; +} + +clib_error_t * +memif_init_regions_and_queues (memif_if_t * mif) +{ + memif_ring_t *ring = NULL; + int i, j; + u64 buffer_offset; + memif_region_t *r; + clib_mem_vm_alloc_t alloc = { 0 }; + clib_error_t *err; + + vec_validate_aligned (mif->regions, 0, CLIB_CACHE_LINE_BYTES); + r = vec_elt_at_index (mif->regions, 0); + + buffer_offset = (mif->run.num_s2m_rings + mif->run.num_m2s_rings) * + (sizeof (memif_ring_t) + + sizeof (memif_desc_t) * (1 << mif->run.log2_ring_size)); + + r->region_size = buffer_offset + + mif->run.buffer_size * (1 << mif->run.log2_ring_size) * + (mif->run.num_s2m_rings + mif->run.num_m2s_rings); + + alloc.name = "memif region"; + alloc.size = r->region_size; + alloc.flags = CLIB_MEM_VM_F_SHARED; + + err = clib_mem_vm_ext_alloc (&alloc); + if (err) + return err; + + r->fd = alloc.fd; + r->shm = alloc.addr; + + for (i = 0; i < mif->run.num_s2m_rings; i++) + { + ring = memif_get_ring (mif, MEMIF_RING_S2M, i); + ring->head = ring->tail = 0; + ring->cookie = MEMIF_COOKIE; + for (j = 0; j < (1 << mif->run.log2_ring_size); j++) + { + u16 slot = i * (1 << mif->run.log2_ring_size) + j; + ring->desc[j].region = 0; + ring->desc[j].offset = + buffer_offset + (u32) (slot * mif->run.buffer_size); + ring->desc[j].buffer_length = mif->run.buffer_size; + } + } + for (i = 0; i < mif->run.num_m2s_rings; i++) + { + ring = memif_get_ring (mif, MEMIF_RING_M2S, i); + ring->head = ring->tail = 0; + ring->cookie = MEMIF_COOKIE; + for (j = 0; j < (1 << mif->run.log2_ring_size); j++) + { + u16 slot = + (i + mif->run.num_s2m_rings) * (1 << mif->run.log2_ring_size) + j; + ring->desc[j].region = 0; + ring->desc[j].offset = + buffer_offset + (u32) (slot * mif->run.buffer_size); + ring->desc[j].buffer_length = mif->run.buffer_size; + } + } + + ASSERT (mif->tx_queues == 0); + vec_validate_aligned (mif->tx_queues, mif->run.num_s2m_rings - 1, + CLIB_CACHE_LINE_BYTES); + vec_foreach_index (i, mif->tx_queues) + { + memif_queue_t *mq = vec_elt_at_index (mif->tx_queues, i); + if ((mq->int_fd = eventfd (0, EFD_NONBLOCK)) < 0) + return clib_error_return_unix (0, "eventfd[tx queue %u]", i); + mq->int_clib_file_index = ~0; + mq->ring = memif_get_ring (mif, MEMIF_RING_S2M, i); + mq->log2_ring_size = mif->cfg.log2_ring_size; + mq->region = 0; + mq->offset = (void *) mq->ring - (void *) mif->regions[mq->region].shm; + mq->last_head = 0; + } + + ASSERT (mif->rx_queues == 0); + vec_validate_aligned (mif->rx_queues, mif->run.num_m2s_rings - 1, + CLIB_CACHE_LINE_BYTES); + vec_foreach_index (i, mif->rx_queues) + { + memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, i); + if ((mq->int_fd = eventfd (0, EFD_NONBLOCK)) < 0) + return clib_error_return_unix (0, "eventfd[rx queue %u]", i); + mq->int_clib_file_index = ~0; + mq->ring = memif_get_ring (mif, MEMIF_RING_M2S, i); + mq->log2_ring_size = mif->cfg.log2_ring_size; + mq->region = 0; + mq->offset = (void *) mq->ring - (void *) mif->regions[mq->region].shm; + mq->last_head = 0; + } + + return 0; +} + +static uword +memif_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f) +{ + memif_main_t *mm = &memif_main; + memif_if_t *mif; + struct sockaddr_un sun; + int sockfd; + uword *event_data = 0, event_type; + u8 enabled = 0; + f64 start_time, last_run_duration = 0, now; + + sockfd = socket (AF_UNIX, SOCK_SEQPACKET, 0); + if (sockfd < 0) + { + DBG_UNIX_LOG ("socket AF_UNIX"); + return 0; + } + sun.sun_family = AF_UNIX; + + while (1) + { + if (enabled) + vlib_process_wait_for_event_or_clock (vm, (f64) 3 - + last_run_duration); + else + vlib_process_wait_for_event (vm); + + event_type = vlib_process_get_events (vm, &event_data); + vec_reset_length (event_data); + + switch (event_type) + { + case ~0: + break; + case MEMIF_PROCESS_EVENT_START: + enabled = 1; + break; + case MEMIF_PROCESS_EVENT_STOP: + enabled = 0; + continue; + default: + ASSERT (0); + } + + last_run_duration = start_time = vlib_time_now (vm); + /* *INDENT-OFF* */ + pool_foreach (mif, mm->interfaces, + ({ + memif_socket_file_t * msf = vec_elt_at_index (mm->socket_files, mif->socket_file_index); + /* Allow no more than 10us without a pause */ + now = vlib_time_now (vm); + if (now > start_time + 10e-6) + { + vlib_process_suspend (vm, 100e-6); /* suspend for 100 us */ + start_time = vlib_time_now (vm); + } + + if ((mif->flags & MEMIF_IF_FLAG_ADMIN_UP) == 0) + continue; + + if (mif->flags & MEMIF_IF_FLAG_CONNECTING) + continue; + + if (mif->flags & MEMIF_IF_FLAG_CONNECTED) + continue; + + if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE) + { + strncpy (sun.sun_path, (char *) msf->filename, + sizeof (sun.sun_path) - 1); + + if (connect + (sockfd, (struct sockaddr *) &sun, + sizeof (struct sockaddr_un)) == 0) + { + clib_file_t t = { 0 }; + + mif->conn_fd = sockfd; + t.read_function = memif_slave_conn_fd_read_ready; + t.write_function = memif_slave_conn_fd_write_ready; + t.error_function = memif_slave_conn_fd_error; + t.file_descriptor = mif->conn_fd; + t.private_data = mif->dev_instance; + memif_file_add (&mif->conn_clib_file_index, &t); + hash_set (msf->dev_instance_by_fd, mif->conn_fd, mif->dev_instance); + + mif->flags |= MEMIF_IF_FLAG_CONNECTING; + + /* grab another fd */ + sockfd = socket (AF_UNIX, SOCK_SEQPACKET, 0); + if (sockfd < 0) + { + DBG_UNIX_LOG ("socket AF_UNIX"); + return 0; + } + } + } + })); + /* *INDENT-ON* */ + last_run_duration = vlib_time_now (vm) - last_run_duration; + } + return 0; +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (memif_process_node,static) = { + .function = memif_process, + .type = VLIB_NODE_TYPE_PROCESS, + .name = "memif-process", +}; +/* *INDENT-ON* */ + +int +memif_delete_if (vlib_main_t * vm, memif_if_t * mif) +{ + vnet_main_t *vnm = vnet_get_main (); + memif_main_t *mm = &memif_main; + memif_socket_file_t *msf = + vec_elt_at_index (mm->socket_files, mif->socket_file_index); + clib_error_t *err; + + mif->flags |= MEMIF_IF_FLAG_DELETING; + vec_free (mif->local_disc_string); + vec_free (mif->remote_disc_string); + + /* bring down the interface */ + vnet_hw_interface_set_flags (vnm, mif->hw_if_index, 0); + vnet_sw_interface_set_flags (vnm, mif->sw_if_index, 0); + + err = clib_error_return (0, "interface deleted"); + memif_disconnect (mif, err); + clib_error_free (err); + + /* remove the interface */ + if (mif->mode == MEMIF_INTERFACE_MODE_IP) + vnet_delete_hw_interface (vnm, mif->hw_if_index); + else + ethernet_delete_interface (vnm, mif->hw_if_index); + mif->hw_if_index = ~0; + + /* free interface data structures */ + clib_spinlock_free (&mif->lockp); + mhash_unset (&msf->dev_instance_by_id, &mif->id, 0); + + /* remove socket file */ + if (--(msf->ref_cnt) == 0) + { + if (msf->is_listener) + { + uword *x; + memif_file_del_by_index (msf->clib_file_index); + vec_foreach (x, msf->pending_file_indices) + { + memif_file_del_by_index (*x); + } + vec_free (msf->pending_file_indices); + } + mhash_free (&msf->dev_instance_by_id); + hash_free (msf->dev_instance_by_fd); + mhash_unset (&mm->socket_file_index_by_filename, msf->filename, 0); + vec_free (msf->filename); + pool_put (mm->socket_files, msf); + } + + memset (mif, 0, sizeof (*mif)); + pool_put (mm->interfaces, mif); + + if (pool_elts (mm->interfaces) == 0) + vlib_process_signal_event (vm, memif_process_node.index, + MEMIF_PROCESS_EVENT_STOP, 0); + + return 0; +} + +/* *INDENT-OFF* */ +VNET_HW_INTERFACE_CLASS (memif_ip_hw_if_class, static) = +{ + .name = "memif-ip", + .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P, +}; +/* *INDENT-ON* */ + +int +memif_create_if (vlib_main_t * vm, memif_create_if_args_t * args) +{ + memif_main_t *mm = &memif_main; + vlib_thread_main_t *tm = vlib_get_thread_main (); + vnet_main_t *vnm = vnet_get_main (); + memif_if_t *mif = 0; + vnet_sw_interface_t *sw; + clib_error_t *error = 0; + int ret = 0; + uword *p; + vnet_hw_interface_t *hw; + memif_socket_file_t *msf = 0; + u8 *socket_filename; + int rv = 0; + + if (args->socket_filename == 0 || args->socket_filename[0] != '/') + { + clib_error_t *error; + error = vlib_unix_recursive_mkdir (vlib_unix_get_runtime_dir ()); + if (error) + { + clib_error_free (error); + return VNET_API_ERROR_SYSCALL_ERROR_1; + } + + if (args->socket_filename == 0) + socket_filename = format (0, "%s/%s%c", vlib_unix_get_runtime_dir (), + MEMIF_DEFAULT_SOCKET_FILENAME, 0); + else + socket_filename = format (0, "%s/%s%c", vlib_unix_get_runtime_dir (), + args->socket_filename, 0); + + } + else + socket_filename = vec_dup (args->socket_filename); + + p = mhash_get (&mm->socket_file_index_by_filename, socket_filename); + + if (p) + { + msf = vec_elt_at_index (mm->socket_files, p[0]); + + /* existing socket file can be either master or slave but cannot be both */ + if (!msf->is_listener != !args->is_master) + { + rv = VNET_API_ERROR_SUBIF_ALREADY_EXISTS; + goto done; + } + + p = mhash_get (&msf->dev_instance_by_id, &args->id); + if (p) + { + rv = VNET_API_ERROR_SUBIF_ALREADY_EXISTS; + goto done; + } + } + + /* Create new socket file */ + if (msf == 0) + { + struct stat file_stat; + /* If we are creating listener make sure file doesn't exist or if it + * exists thn delete it if it is old socket file */ + if (args->is_master && + (stat ((char *) socket_filename, &file_stat) == 0)) + { + if (S_ISSOCK (file_stat.st_mode)) + { + unlink ((char *) socket_filename); + } + else + { + error = clib_error_return (0, "File exists for %s", + socket_filename); + clib_error_report (error); + rv = VNET_API_ERROR_VALUE_EXIST; + goto done; + } + } + pool_get (mm->socket_files, msf); + memset (msf, 0, sizeof (memif_socket_file_t)); + mhash_init (&msf->dev_instance_by_id, sizeof (uword), + sizeof (memif_interface_id_t)); + msf->dev_instance_by_fd = hash_create (0, sizeof (uword)); + msf->filename = socket_filename; + msf->fd = -1; + msf->is_listener = (args->is_master != 0); + socket_filename = 0; + mhash_set (&mm->socket_file_index_by_filename, msf->filename, + msf - mm->socket_files, 0); + DBG ("creating socket file %s", msf->filename); + } + + pool_get (mm->interfaces, mif); + memset (mif, 0, sizeof (*mif)); + mif->dev_instance = mif - mm->interfaces; + mif->socket_file_index = msf - mm->socket_files; + mif->id = args->id; + mif->sw_if_index = mif->hw_if_index = mif->per_interface_next_index = ~0; + mif->conn_clib_file_index = ~0; + mif->conn_fd = -1; + mif->mode = args->mode; + if (args->secret) + mif->secret = vec_dup (args->secret); + + if (tm->n_vlib_mains > 1) + clib_spinlock_init (&mif->lockp); + + + if (mif->mode == MEMIF_INTERFACE_MODE_ETHERNET) + { + + if (!args->hw_addr_set) + { + f64 now = vlib_time_now (vm); + u32 rnd; + rnd = (u32) (now * 1e6); + rnd = random_u32 (&rnd); + + memcpy (args->hw_addr + 2, &rnd, sizeof (rnd)); + args->hw_addr[0] = 2; + args->hw_addr[1] = 0xfe; + } + error = ethernet_register_interface (vnm, memif_device_class.index, + mif->dev_instance, args->hw_addr, + &mif->hw_if_index, + memif_eth_flag_change); + } + else if (mif->mode == MEMIF_INTERFACE_MODE_IP) + { + mif->hw_if_index = + vnet_register_interface (vnm, memif_device_class.index, + mif->dev_instance, + memif_ip_hw_if_class.index, + mif->dev_instance); + } + else + error = clib_error_return (0, "unsupported interface mode"); + + if (error) + { + clib_error_report (error); + ret = VNET_API_ERROR_SYSCALL_ERROR_2; + goto error; + } + + sw = vnet_get_hw_sw_interface (vnm, mif->hw_if_index); + mif->sw_if_index = sw->sw_if_index; + + mif->cfg.log2_ring_size = args->log2_ring_size; + mif->cfg.buffer_size = args->buffer_size; + mif->cfg.num_s2m_rings = + args->is_master ? args->rx_queues : args->tx_queues; + mif->cfg.num_m2s_rings = + args->is_master ? args->tx_queues : args->rx_queues; + + args->sw_if_index = mif->sw_if_index; + + /* If this is new one, start listening */ + if (msf->is_listener && msf->ref_cnt == 0) + { + struct sockaddr_un un = { 0 }; + struct stat file_stat; + int on = 1; + + if ((msf->fd = socket (AF_UNIX, SOCK_SEQPACKET, 0)) < 0) + { + ret = VNET_API_ERROR_SYSCALL_ERROR_4; + goto error; + } + + un.sun_family = AF_UNIX; + strncpy ((char *) un.sun_path, (char *) msf->filename, + sizeof (un.sun_path) - 1); + + if (setsockopt (msf->fd, SOL_SOCKET, SO_PASSCRED, &on, sizeof (on)) < 0) + { + ret = VNET_API_ERROR_SYSCALL_ERROR_5; + goto error; + } + if (bind (msf->fd, (struct sockaddr *) &un, sizeof (un)) == -1) + { + ret = VNET_API_ERROR_SYSCALL_ERROR_6; + goto error; + } + if (listen (msf->fd, 1) == -1) + { + ret = VNET_API_ERROR_SYSCALL_ERROR_7; + goto error; + } + + if (stat ((char *) msf->filename, &file_stat) == -1) + { + ret = VNET_API_ERROR_SYSCALL_ERROR_8; + goto error; + } + + msf->clib_file_index = ~0; + clib_file_t template = { 0 }; + template.read_function = memif_conn_fd_accept_ready; + template.file_descriptor = msf->fd; + template.private_data = mif->socket_file_index; + memif_file_add (&msf->clib_file_index, &template); + } + + msf->ref_cnt++; + + if (args->is_master == 0) + mif->flags |= MEMIF_IF_FLAG_IS_SLAVE; + + hw = vnet_get_hw_interface (vnm, mif->hw_if_index); + hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE; + vnet_hw_interface_set_input_node (vnm, mif->hw_if_index, + memif_input_node.index); + + mhash_set (&msf->dev_instance_by_id, &mif->id, mif->dev_instance, 0); + + if (pool_elts (mm->interfaces) == 1) + { + vlib_process_signal_event (vm, memif_process_node.index, + MEMIF_PROCESS_EVENT_START, 0); + } + goto done; + +error: + if (mif->hw_if_index != ~0) + { + if (mif->mode == MEMIF_INTERFACE_MODE_IP) + vnet_delete_hw_interface (vnm, mif->hw_if_index); + else + ethernet_delete_interface (vnm, mif->hw_if_index); + mif->hw_if_index = ~0; + } + memif_delete_if (vm, mif); + return ret; + +done: + vec_free (socket_filename); + return rv; +} + + +static clib_error_t * +memif_init (vlib_main_t * vm) +{ + memif_main_t *mm = &memif_main; + vlib_thread_main_t *tm = vlib_get_thread_main (); + + memset (mm, 0, sizeof (memif_main_t)); + + /* initialize binary API */ + memif_plugin_api_hookup (vm); + + mhash_init_c_string (&mm->socket_file_index_by_filename, sizeof (uword)); + + vec_validate_aligned (mm->rx_buffers, tm->n_vlib_mains - 1, + CLIB_CACHE_LINE_BYTES); + + return 0; +} + +VLIB_INIT_FUNCTION (memif_init); + +/* *INDENT-OFF* */ +VLIB_PLUGIN_REGISTER () = { + .version = VPP_BUILD_VER, + .description = "Packet Memory Interface (experimetal)", +}; +/* *INDENT-ON* */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |