--- /dev/null
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright 2019 Mellanox Technologies, Ltd
+ */
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+#include "rte_eal.h"
+#include "mlx5_utils.h"
+#include "mlx5.h"
+
+/* PMD socket service for tools. */
+
+int server_socket; /* Unix socket for primary process. */
+struct rte_intr_handle server_intr_handle; /* Interrupt handler. */
+
+static void
+mlx5_pmd_make_path(struct sockaddr_un *addr, int pid)
+{
+ snprintf(addr->sun_path, sizeof(addr->sun_path), "/var/tmp/dpdk_%s_%d",
+ MLX5_DRIVER_NAME, pid);
+}
+
+/**
+ * Handle server pmd socket interrupts.
+ */
+static void
+mlx5_pmd_socket_handle(void *cb __rte_unused)
+{
+ int conn_sock;
+ int ret = -1;
+ struct cmsghdr *cmsg = NULL;
+ int data;
+ char buf[CMSG_SPACE(sizeof(int))] = { 0 };
+ struct iovec io = {
+ .iov_base = &data,
+ .iov_len = sizeof(data),
+ };
+ struct msghdr msg = {
+ .msg_iov = &io,
+ .msg_iovlen = 1,
+ .msg_control = buf,
+ .msg_controllen = sizeof(buf),
+ };
+ uint16_t port_id;
+ int fd;
+ FILE *file = NULL;
+ struct rte_eth_dev *dev;
+
+ /* Accept the connection from the client. */
+ conn_sock = accept(server_socket, NULL, NULL);
+ if (conn_sock < 0) {
+ DRV_LOG(WARNING, "connection failed: %s", strerror(errno));
+ return;
+ }
+ ret = recvmsg(conn_sock, &msg, MSG_WAITALL);
+ if (ret < 0) {
+ DRV_LOG(WARNING, "wrong message received: %s",
+ strerror(errno));
+ goto error;
+ }
+ /* Receive file descriptor. */
+ cmsg = CMSG_FIRSTHDR(&msg);
+ if (cmsg == NULL || cmsg->cmsg_type != SCM_RIGHTS ||
+ cmsg->cmsg_len < sizeof(int)) {
+ DRV_LOG(WARNING, "invalid file descriptor message");
+ goto error;
+ }
+ memcpy(&fd, CMSG_DATA(cmsg), sizeof(fd));
+ file = fdopen(fd, "w");
+ if (!file) {
+ DRV_LOG(WARNING, "Failed to open file");
+ goto error;
+ }
+ /* Receive port number. */
+ if (msg.msg_iovlen != 1 || msg.msg_iov->iov_len < sizeof(uint16_t)) {
+ DRV_LOG(WARNING, "wrong port number message");
+ goto error;
+ }
+ memcpy(&port_id, msg.msg_iov->iov_base, sizeof(port_id));
+ if (!rte_eth_dev_is_valid_port(port_id)) {
+ DRV_LOG(WARNING, "Invalid port %u", port_id);
+ goto error;
+ }
+ /* Dump flow. */
+ dev = &rte_eth_devices[port_id];
+ ret = mlx5_flow_dev_dump(dev, file, NULL);
+ /* Set-up the ancillary data and reply. */
+ msg.msg_controllen = 0;
+ msg.msg_control = NULL;
+ msg.msg_iovlen = 1;
+ msg.msg_iov = &io;
+ data = -ret;
+ io.iov_len = sizeof(data);
+ io.iov_base = &data;
+ do {
+ ret = sendmsg(conn_sock, &msg, 0);
+ } while (ret < 0 && errno == EINTR);
+ if (ret < 0)
+ DRV_LOG(WARNING, "failed to send response %s",
+ strerror(errno));
+error:
+ if (conn_sock > 0)
+ close(conn_sock);
+ if (file)
+ fclose(file);
+}
+
+/**
+ * Install interrupt handler.
+ *
+ * @param dev
+ * Pointer to Ethernet device.
+ * @return
+ * 0 on success, a negative errno value otherwise.
+ */
+static int
+mlx5_pmd_interrupt_handler_install(void)
+{
+ assert(server_socket);
+ server_intr_handle.fd = server_socket;
+ server_intr_handle.type = RTE_INTR_HANDLE_EXT;
+ return rte_intr_callback_register(&server_intr_handle,
+ mlx5_pmd_socket_handle, NULL);
+}
+
+/**
+ * Uninstall interrupt handler.
+ */
+static void
+mlx5_pmd_interrupt_handler_uninstall(void)
+{
+ if (server_socket) {
+ mlx5_intr_callback_unregister(&server_intr_handle,
+ mlx5_pmd_socket_handle,
+ NULL);
+ }
+ server_intr_handle.fd = 0;
+ server_intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
+}
+
+/**
+ * Initialise the socket to communicate with the secondary process
+ *
+ * @param[in] dev
+ * Pointer to Ethernet device.
+ *
+ * @return
+ * 0 on success, a negative value otherwise.
+ */
+int
+mlx5_pmd_socket_init(void)
+{
+ struct sockaddr_un sun = {
+ .sun_family = AF_UNIX,
+ };
+ int ret = -1;
+ int flags;
+
+ assert(rte_eal_process_type() == RTE_PROC_PRIMARY);
+ if (server_socket)
+ return 0;
+ /*
+ * Initialize the socket to communicate with the secondary
+ * process.
+ */
+ ret = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (ret < 0) {
+ DRV_LOG(WARNING, "Failed to open mlx5 socket: %s",
+ strerror(errno));
+ goto error;
+ }
+ server_socket = ret;
+ flags = fcntl(server_socket, F_GETFL, 0);
+ if (flags == -1)
+ goto error;
+ ret = fcntl(server_socket, F_SETFL, flags | O_NONBLOCK);
+ if (ret < 0)
+ goto error;
+ mlx5_pmd_make_path(&sun, getpid());
+ remove(sun.sun_path);
+ ret = bind(server_socket, (const struct sockaddr *)&sun, sizeof(sun));
+ if (ret < 0) {
+ DRV_LOG(WARNING,
+ "cannot bind mlx5 socket: %s", strerror(errno));
+ goto close;
+ }
+ ret = listen(server_socket, 0);
+ if (ret < 0) {
+ DRV_LOG(WARNING, "cannot listen on mlx5 socket: %s",
+ strerror(errno));
+ goto close;
+ }
+ if (mlx5_pmd_interrupt_handler_install()) {
+ DRV_LOG(WARNING, "cannot register interrupt handler for mlx5 socket: %s",
+ strerror(errno));
+ goto close;
+ }
+ return 0;
+close:
+ remove(sun.sun_path);
+error:
+ claim_zero(close(server_socket));
+ server_socket = 0;
+ DRV_LOG(ERR, "Cannot initialize socket: %s", strerror(errno));
+ return -errno;
+}
+
+/**
+ * Un-Initialize the pmd socket
+ */
+void __attribute__((destructor))
+mlx5_pmd_socket_uninit(void)
+{
+ if (!server_socket)
+ return;
+ mlx5_pmd_interrupt_handler_uninstall();
+ claim_zero(close(server_socket));
+ server_socket = 0;
+ MKSTR(path, "/var/tmp/dpdk_%s_%d", MLX5_DRIVER_NAME, getpid());
+ claim_zero(remove(path));
+}
git.droids-corp.org / dpdk.git / commitdiff