+++ /dev/null
-/*
- * QEMU paravirtual RDMA - rdmacm-mux implementation
- *
- * Copyright (C) 2018 Oracle
- * Copyright (C) 2018 Red Hat Inc
- *
- * Authors:
- * Yuval Shaia <yuval.shaia@oracle.com>
- * Marcel Apfelbaum <marcel@redhat.com>
- *
- * This work is licensed under the terms of the GNU GPL, version 2 or later.
- * See the COPYING file in the top-level directory.
- *
- */
-
-#include "qemu/osdep.h"
-#include <sys/poll.h>
-#include <sys/ioctl.h>
-#include <pthread.h>
-#include <syslog.h>
-
-#include <infiniband/verbs.h>
-#include <infiniband/umad.h>
-#include <infiniband/umad_types.h>
-#include <infiniband/umad_sa.h>
-#include <infiniband/umad_cm.h>
-
-#include "rdmacm-mux.h"
-
-#define SCALE_US 1000
-#define COMMID_TTL 2 /* How many SCALE_US a context of MAD session is saved */
-#define SLEEP_SECS 5 /* This is used both in poll() and thread */
-#define SERVER_LISTEN_BACKLOG 10
-#define MAX_CLIENTS 4096
-#define MAD_RMPP_VERSION 0
-#define MAD_METHOD_MASK0 0x8
-
-#define IB_USER_MAD_LONGS_PER_METHOD_MASK (128 / (8 * sizeof(long)))
-
-#define CM_REQ_DGID_POS 80
-#define CM_SIDR_REQ_DGID_POS 44
-
-/* The below can be override by command line parameter */
-#define UNIX_SOCKET_PATH "/var/run/rdmacm-mux"
-/* Has format %s-%s-%d" <path>-<rdma-dev--name>-<port> */
-#define SOCKET_PATH_MAX (PATH_MAX - NAME_MAX - sizeof(int) - 2)
-#define RDMA_PORT_NUM 1
-
-typedef struct RdmaCmServerArgs {
- char unix_socket_path[PATH_MAX];
- char rdma_dev_name[NAME_MAX];
- int rdma_port_num;
-} RdmaCMServerArgs;
-
-typedef struct CommId2FdEntry {
- int fd;
- int ttl; /* Initialized to 2, decrement each timeout, entry delete when 0 */
- __be64 gid_ifid;
-} CommId2FdEntry;
-
-typedef struct RdmaCmUMadAgent {
- int port_id;
- int agent_id;
- GHashTable *gid2fd; /* Used to find fd of a given gid */
- GHashTable *commid2fd; /* Used to find fd on of a given comm_id */
-} RdmaCmUMadAgent;
-
-typedef struct RdmaCmServer {
- bool run;
- RdmaCMServerArgs args;
- struct pollfd fds[MAX_CLIENTS];
- int nfds;
- RdmaCmUMadAgent umad_agent;
- pthread_t umad_recv_thread;
- pthread_rwlock_t lock;
-} RdmaCMServer;
-
-static RdmaCMServer server = {0};
-
-static void usage(const char *progname)
-{
- printf("Usage: %s [OPTION]...\n"
- "Start a RDMA-CM multiplexer\n"
- "\n"
- "\t-h Show this help\n"
- "\t-d rdma-device-name Name of RDMA device to register with\n"
- "\t-s unix-socket-path Path to unix socket to listen on (default %s)\n"
- "\t-p rdma-device-port Port number of RDMA device to register with (default %d)\n",
- progname, UNIX_SOCKET_PATH, RDMA_PORT_NUM);
-}
-
-static void help(const char *progname)
-{
- fprintf(stderr, "Try '%s -h' for more information.\n", progname);
-}
-
-static void parse_args(int argc, char *argv[])
-{
- int c;
- char unix_socket_path[SOCKET_PATH_MAX];
-
- strcpy(server.args.rdma_dev_name, "");
- strcpy(unix_socket_path, UNIX_SOCKET_PATH);
- server.args.rdma_port_num = RDMA_PORT_NUM;
-
- while ((c = getopt(argc, argv, "hs:d:p:")) != -1) {
- switch (c) {
- case 'h':
- usage(argv[0]);
- exit(0);
-
- case 'd':
- strncpy(server.args.rdma_dev_name, optarg, NAME_MAX - 1);
- break;
-
- case 's':
- /* This is temporary, final name will build below */
- strncpy(unix_socket_path, optarg, SOCKET_PATH_MAX - 1);
- break;
-
- case 'p':
- server.args.rdma_port_num = atoi(optarg);
- break;
-
- default:
- help(argv[0]);
- exit(1);
- }
- }
-
- if (!strcmp(server.args.rdma_dev_name, "")) {
- fprintf(stderr, "Missing RDMA device name\n");
- help(argv[0]);
- exit(1);
- }
-
- /* Build unique unix-socket file name */
- snprintf(server.args.unix_socket_path, PATH_MAX, "%s-%s-%d",
- unix_socket_path, server.args.rdma_dev_name,
- server.args.rdma_port_num);
-
- syslog(LOG_INFO, "unix_socket_path=%s", server.args.unix_socket_path);
- syslog(LOG_INFO, "rdma-device-name=%s", server.args.rdma_dev_name);
- syslog(LOG_INFO, "rdma-device-port=%d", server.args.rdma_port_num);
-}
-
-static void hash_tbl_alloc(void)
-{
-
- server.umad_agent.gid2fd = g_hash_table_new_full(g_int64_hash,
- g_int64_equal,
- g_free, g_free);
- server.umad_agent.commid2fd = g_hash_table_new_full(g_int_hash,
- g_int_equal,
- g_free, g_free);
-}
-
-static void hash_tbl_free(void)
-{
- if (server.umad_agent.commid2fd) {
- g_hash_table_destroy(server.umad_agent.commid2fd);
- }
- if (server.umad_agent.gid2fd) {
- g_hash_table_destroy(server.umad_agent.gid2fd);
- }
-}
-
-
-static int _hash_tbl_search_fd_by_ifid(__be64 *gid_ifid)
-{
- int *fd;
-
- fd = g_hash_table_lookup(server.umad_agent.gid2fd, gid_ifid);
- if (!fd) {
- /* Let's try IPv4 */
- *gid_ifid |= 0x00000000ffff0000;
- fd = g_hash_table_lookup(server.umad_agent.gid2fd, gid_ifid);
- }
-
- return fd ? *fd : 0;
-}
-
-static int hash_tbl_search_fd_by_ifid(int *fd, __be64 *gid_ifid)
-{
- pthread_rwlock_rdlock(&server.lock);
- *fd = _hash_tbl_search_fd_by_ifid(gid_ifid);
- pthread_rwlock_unlock(&server.lock);
-
- if (!*fd) {
- syslog(LOG_WARNING, "Can't find matching for ifid 0x%llx\n", *gid_ifid);
- return -ENOENT;
- }
-
- return 0;
-}
-
-static int hash_tbl_search_fd_by_comm_id(uint32_t comm_id, int *fd,
- __be64 *gid_idid)
-{
- CommId2FdEntry *fde;
-
- pthread_rwlock_rdlock(&server.lock);
- fde = g_hash_table_lookup(server.umad_agent.commid2fd, &comm_id);
- pthread_rwlock_unlock(&server.lock);
-
- if (!fde) {
- syslog(LOG_WARNING, "Can't find matching for comm_id 0x%x\n", comm_id);
- return -ENOENT;
- }
-
- *fd = fde->fd;
- *gid_idid = fde->gid_ifid;
-
- return 0;
-}
-
-static RdmaCmMuxErrCode add_fd_ifid_pair(int fd, __be64 gid_ifid)
-{
- int fd1;
-
- pthread_rwlock_wrlock(&server.lock);
-
- fd1 = _hash_tbl_search_fd_by_ifid(&gid_ifid);
- if (fd1) { /* record already exist - an error */
- pthread_rwlock_unlock(&server.lock);
- return fd == fd1 ? RDMACM_MUX_ERR_CODE_EEXIST :
- RDMACM_MUX_ERR_CODE_EACCES;
- }
-
- g_hash_table_insert(server.umad_agent.gid2fd, g_memdup(&gid_ifid,
- sizeof(gid_ifid)), g_memdup(&fd, sizeof(fd)));
-
- pthread_rwlock_unlock(&server.lock);
-
- syslog(LOG_INFO, "0x%lx registered on socket %d",
- be64toh((uint64_t)gid_ifid), fd);
-
- return RDMACM_MUX_ERR_CODE_OK;
-}
-
-static RdmaCmMuxErrCode delete_fd_ifid_pair(int fd, __be64 gid_ifid)
-{
- int fd1;
-
- pthread_rwlock_wrlock(&server.lock);
-
- fd1 = _hash_tbl_search_fd_by_ifid(&gid_ifid);
- if (!fd1) { /* record not exist - an error */
- pthread_rwlock_unlock(&server.lock);
- return RDMACM_MUX_ERR_CODE_ENOTFOUND;
- }
-
- g_hash_table_remove(server.umad_agent.gid2fd, g_memdup(&gid_ifid,
- sizeof(gid_ifid)));
- pthread_rwlock_unlock(&server.lock);
-
- syslog(LOG_INFO, "0x%lx unregistered on socket %d",
- be64toh((uint64_t)gid_ifid), fd);
-
- return RDMACM_MUX_ERR_CODE_OK;
-}
-
-static void hash_tbl_save_fd_comm_id_pair(int fd, uint32_t comm_id,
- uint64_t gid_ifid)
-{
- CommId2FdEntry fde = {fd, COMMID_TTL, gid_ifid};
-
- pthread_rwlock_wrlock(&server.lock);
- g_hash_table_insert(server.umad_agent.commid2fd,
- g_memdup(&comm_id, sizeof(comm_id)),
- g_memdup(&fde, sizeof(fde)));
- pthread_rwlock_unlock(&server.lock);
-}
-
-static gboolean remove_old_comm_ids(gpointer key, gpointer value,
- gpointer user_data)
-{
- CommId2FdEntry *fde = (CommId2FdEntry *)value;
-
- return !fde->ttl--;
-}
-
-static gboolean remove_entry_from_gid2fd(gpointer key, gpointer value,
- gpointer user_data)
-{
- if (*(int *)value == *(int *)user_data) {
- syslog(LOG_INFO, "0x%lx unregistered on socket %d",
- be64toh(*(uint64_t *)key), *(int *)value);
- return true;
- }
-
- return false;
-}
-
-static void hash_tbl_remove_fd_ifid_pair(int fd)
-{
- pthread_rwlock_wrlock(&server.lock);
- g_hash_table_foreach_remove(server.umad_agent.gid2fd,
- remove_entry_from_gid2fd, (gpointer)&fd);
- pthread_rwlock_unlock(&server.lock);
-}
-
-static int get_fd(const char *mad, int umad_len, int *fd, __be64 *gid_ifid)
-{
- struct umad_hdr *hdr = (struct umad_hdr *)mad;
- char *data = (char *)hdr + sizeof(*hdr);
- int32_t comm_id = 0;
- uint16_t attr_id = be16toh(hdr->attr_id);
- int rc = 0;
-
- if (umad_len <= sizeof(*hdr)) {
- rc = -EINVAL;
- syslog(LOG_DEBUG, "Ignoring MAD packets with header only\n");
- goto out;
- }
-
- switch (attr_id) {
- case UMAD_CM_ATTR_REQ:
- if (unlikely(umad_len < sizeof(*hdr) + CM_REQ_DGID_POS +
- sizeof(*gid_ifid))) {
- rc = -EINVAL;
- syslog(LOG_WARNING,
- "Invalid MAD packet size (%d) for attr_id 0x%x\n", umad_len,
- attr_id);
- goto out;
- }
- memcpy(gid_ifid, data + CM_REQ_DGID_POS, sizeof(*gid_ifid));
- rc = hash_tbl_search_fd_by_ifid(fd, gid_ifid);
- break;
-
- case UMAD_CM_ATTR_SIDR_REQ:
- if (unlikely(umad_len < sizeof(*hdr) + CM_SIDR_REQ_DGID_POS +
- sizeof(*gid_ifid))) {
- rc = -EINVAL;
- syslog(LOG_WARNING,
- "Invalid MAD packet size (%d) for attr_id 0x%x\n", umad_len,
- attr_id);
- goto out;
- }
- memcpy(gid_ifid, data + CM_SIDR_REQ_DGID_POS, sizeof(*gid_ifid));
- rc = hash_tbl_search_fd_by_ifid(fd, gid_ifid);
- break;
-
- case UMAD_CM_ATTR_REP:
- /* Fall through */
- case UMAD_CM_ATTR_REJ:
- /* Fall through */
- case UMAD_CM_ATTR_DREQ:
- /* Fall through */
- case UMAD_CM_ATTR_DREP:
- /* Fall through */
- case UMAD_CM_ATTR_RTU:
- data += sizeof(comm_id);
- /* Fall through */
- case UMAD_CM_ATTR_SIDR_REP:
- if (unlikely(umad_len < sizeof(*hdr) + sizeof(comm_id))) {
- rc = -EINVAL;
- syslog(LOG_WARNING,
- "Invalid MAD packet size (%d) for attr_id 0x%x\n", umad_len,
- attr_id);
- goto out;
- }
- memcpy(&comm_id, data, sizeof(comm_id));
- if (comm_id) {
- rc = hash_tbl_search_fd_by_comm_id(comm_id, fd, gid_ifid);
- }
- break;
-
- default:
- rc = -EINVAL;
- syslog(LOG_WARNING, "Unsupported attr_id 0x%x\n", attr_id);
- }
-
- syslog(LOG_DEBUG, "mad_to_vm: %d 0x%x 0x%x\n", *fd, attr_id, comm_id);
-
-out:
- return rc;
-}
-
-static void *umad_recv_thread_func(void *args)
-{
- int rc;
- RdmaCmMuxMsg msg = {};
- int fd = -2;
-
- msg.hdr.msg_type = RDMACM_MUX_MSG_TYPE_REQ;
- msg.hdr.op_code = RDMACM_MUX_OP_CODE_MAD;
-
- while (server.run) {
- do {
- msg.umad_len = sizeof(msg.umad.mad);
- rc = umad_recv(server.umad_agent.port_id, &msg.umad, &msg.umad_len,
- SLEEP_SECS * SCALE_US);
- if ((rc == -EIO) || (rc == -EINVAL)) {
- syslog(LOG_CRIT, "Fatal error while trying to read MAD");
- }
-
- if (rc == -ETIMEDOUT) {
- g_hash_table_foreach_remove(server.umad_agent.commid2fd,
- remove_old_comm_ids, NULL);
- }
- } while (rc && server.run);
-
- if (server.run) {
- rc = get_fd(msg.umad.mad, msg.umad_len, &fd,
- &msg.hdr.sgid.global.interface_id);
- if (rc) {
- continue;
- }
-
- send(fd, &msg, sizeof(msg), 0);
- }
- }
-
- return NULL;
-}
-
-static int read_and_process(int fd)
-{
- int rc;
- RdmaCmMuxMsg msg = {};
- struct umad_hdr *hdr;
- uint32_t *comm_id = 0;
- uint16_t attr_id;
-
- rc = recv(fd, &msg, sizeof(msg), 0);
- syslog(LOG_DEBUG, "Socket %d, recv %d\n", fd, rc);
-
- if (rc < 0 && errno != EWOULDBLOCK) {
- syslog(LOG_ERR, "Fail to read from socket %d\n", fd);
- return -EIO;
- }
-
- if (!rc) {
- syslog(LOG_ERR, "Fail to read from socket %d\n", fd);
- return -EPIPE;
- }
-
- if (msg.hdr.msg_type != RDMACM_MUX_MSG_TYPE_REQ) {
- syslog(LOG_WARNING, "Got non-request message (%d) from socket %d\n",
- msg.hdr.msg_type, fd);
- return -EPERM;
- }
-
- switch (msg.hdr.op_code) {
- case RDMACM_MUX_OP_CODE_REG:
- rc = add_fd_ifid_pair(fd, msg.hdr.sgid.global.interface_id);
- break;
-
- case RDMACM_MUX_OP_CODE_UNREG:
- rc = delete_fd_ifid_pair(fd, msg.hdr.sgid.global.interface_id);
- break;
-
- case RDMACM_MUX_OP_CODE_MAD:
- /* If this is REQ or REP then store the pair comm_id,fd to be later
- * used for other messages where gid is unknown */
- hdr = (struct umad_hdr *)msg.umad.mad;
- attr_id = be16toh(hdr->attr_id);
- if ((attr_id == UMAD_CM_ATTR_REQ) || (attr_id == UMAD_CM_ATTR_DREQ) ||
- (attr_id == UMAD_CM_ATTR_SIDR_REQ) ||
- (attr_id == UMAD_CM_ATTR_REP) || (attr_id == UMAD_CM_ATTR_DREP)) {
- comm_id = (uint32_t *)(msg.umad.mad + sizeof(*hdr));
- hash_tbl_save_fd_comm_id_pair(fd, *comm_id,
- msg.hdr.sgid.global.interface_id);
- }
-
- syslog(LOG_DEBUG, "vm_to_mad: %d 0x%x 0x%x\n", fd, attr_id,
- comm_id ? *comm_id : 0);
- rc = umad_send(server.umad_agent.port_id, server.umad_agent.agent_id,
- &msg.umad, msg.umad_len, 1, 0);
- if (rc) {
- syslog(LOG_ERR,
- "Fail to send MAD message (0x%x) from socket %d, err=%d",
- attr_id, fd, rc);
- }
- break;
-
- default:
- syslog(LOG_ERR, "Got invalid op_code (%d) from socket %d",
- msg.hdr.msg_type, fd);
- rc = RDMACM_MUX_ERR_CODE_EINVAL;
- }
-
- msg.hdr.msg_type = RDMACM_MUX_MSG_TYPE_RESP;
- msg.hdr.err_code = rc;
- rc = send(fd, &msg, sizeof(msg), 0);
-
- return rc == sizeof(msg) ? 0 : -EPIPE;
-}
-
-static int accept_all(void)
-{
- int fd, rc = 0;
-
- pthread_rwlock_wrlock(&server.lock);
-
- do {
- if ((server.nfds + 1) > MAX_CLIENTS) {
- syslog(LOG_WARNING, "Too many clients (%d)", server.nfds);
- rc = -EIO;
- goto out;
- }
-
- fd = accept(server.fds[0].fd, NULL, NULL);
- if (fd < 0) {
- if (errno != EWOULDBLOCK) {
- syslog(LOG_WARNING, "accept() failed");
- rc = -EIO;
- goto out;
- }
- break;
- }
-
- syslog(LOG_INFO, "Client connected on socket %d\n", fd);
- server.fds[server.nfds].fd = fd;
- server.fds[server.nfds].events = POLLIN;
- server.nfds++;
- } while (fd != -1);
-
-out:
- pthread_rwlock_unlock(&server.lock);
- return rc;
-}
-
-static void compress_fds(void)
-{
- int i, j;
- int closed = 0;
-
- pthread_rwlock_wrlock(&server.lock);
-
- for (i = 1; i < server.nfds; i++) {
- if (!server.fds[i].fd) {
- closed++;
- for (j = i; j < server.nfds - 1; j++) {
- server.fds[j] = server.fds[j + 1];
- }
- }
- }
-
- server.nfds -= closed;
-
- pthread_rwlock_unlock(&server.lock);
-}
-
-static void close_fd(int idx)
-{
- close(server.fds[idx].fd);
- syslog(LOG_INFO, "Socket %d closed\n", server.fds[idx].fd);
- hash_tbl_remove_fd_ifid_pair(server.fds[idx].fd);
- server.fds[idx].fd = 0;
-}
-
-static void run(void)
-{
- int rc, nfds, i;
- bool compress = false;
-
- syslog(LOG_INFO, "Service started");
-
- while (server.run) {
- rc = poll(server.fds, server.nfds, SLEEP_SECS * SCALE_US);
- if (rc < 0) {
- if (errno != EINTR) {
- syslog(LOG_WARNING, "poll() failed");
- }
- continue;
- }
-
- if (rc == 0) {
- continue;
- }
-
- nfds = server.nfds;
- for (i = 0; i < nfds; i++) {
- syslog(LOG_DEBUG, "pollfd[%d]: revents 0x%x, events 0x%x\n", i,
- server.fds[i].revents, server.fds[i].events);
- if (server.fds[i].revents == 0) {
- continue;
- }
-
- if (server.fds[i].revents != POLLIN) {
- if (i == 0) {
- syslog(LOG_NOTICE, "Unexpected poll() event (0x%x)\n",
- server.fds[i].revents);
- } else {
- close_fd(i);
- compress = true;
- }
- continue;
- }
-
- if (i == 0) {
- rc = accept_all();
- if (rc) {
- continue;
- }
- } else {
- rc = read_and_process(server.fds[i].fd);
- if (rc) {
- close_fd(i);
- compress = true;
- }
- }
- }
-
- if (compress) {
- compress = false;
- compress_fds();
- }
- }
-}
-
-static void fini_listener(void)
-{
- int i;
-
- if (server.fds[0].fd <= 0) {
- return;
- }
-
- for (i = server.nfds - 1; i >= 0; i--) {
- if (server.fds[i].fd) {
- close(server.fds[i].fd);
- }
- }
-
- unlink(server.args.unix_socket_path);
-}
-
-static void fini_umad(void)
-{
- if (server.umad_agent.agent_id) {
- umad_unregister(server.umad_agent.port_id, server.umad_agent.agent_id);
- }
-
- if (server.umad_agent.port_id) {
- umad_close_port(server.umad_agent.port_id);
- }
-
- hash_tbl_free();
-}
-
-static void fini(void)
-{
- if (server.umad_recv_thread) {
- pthread_join(server.umad_recv_thread, NULL);
- server.umad_recv_thread = 0;
- }
- fini_umad();
- fini_listener();
- pthread_rwlock_destroy(&server.lock);
-
- syslog(LOG_INFO, "Service going down");
-}
-
-static int init_listener(void)
-{
- struct sockaddr_un sun;
- int rc, on = 1;
-
- server.fds[0].fd = socket(AF_UNIX, SOCK_STREAM, 0);
- if (server.fds[0].fd < 0) {
- syslog(LOG_ALERT, "socket() failed");
- return -EIO;
- }
-
- rc = setsockopt(server.fds[0].fd, SOL_SOCKET, SO_REUSEADDR, (char *)&on,
- sizeof(on));
- if (rc < 0) {
- syslog(LOG_ALERT, "setsockopt() failed");
- rc = -EIO;
- goto err;
- }
-
- rc = ioctl(server.fds[0].fd, FIONBIO, (char *)&on);
- if (rc < 0) {
- syslog(LOG_ALERT, "ioctl() failed");
- rc = -EIO;
- goto err;
- }
-
- if (strlen(server.args.unix_socket_path) >= sizeof(sun.sun_path)) {
- syslog(LOG_ALERT,
- "Invalid unix_socket_path, size must be less than %ld\n",
- sizeof(sun.sun_path));
- rc = -EINVAL;
- goto err;
- }
-
- sun.sun_family = AF_UNIX;
- rc = snprintf(sun.sun_path, sizeof(sun.sun_path), "%s",
- server.args.unix_socket_path);
- if (rc < 0 || rc >= sizeof(sun.sun_path)) {
- syslog(LOG_ALERT, "Could not copy unix socket path\n");
- rc = -EINVAL;
- goto err;
- }
-
- rc = bind(server.fds[0].fd, (struct sockaddr *)&sun, sizeof(sun));
- if (rc < 0) {
- syslog(LOG_ALERT, "bind() failed");
- rc = -EIO;
- goto err;
- }
-
- rc = listen(server.fds[0].fd, SERVER_LISTEN_BACKLOG);
- if (rc < 0) {
- syslog(LOG_ALERT, "listen() failed");
- rc = -EIO;
- goto err;
- }
-
- server.fds[0].events = POLLIN;
- server.nfds = 1;
- server.run = true;
-
- return 0;
-
-err:
- close(server.fds[0].fd);
- return rc;
-}
-
-static int init_umad(void)
-{
- long method_mask[IB_USER_MAD_LONGS_PER_METHOD_MASK];
-
- server.umad_agent.port_id = umad_open_port(server.args.rdma_dev_name,
- server.args.rdma_port_num);
-
- if (server.umad_agent.port_id < 0) {
- syslog(LOG_WARNING, "umad_open_port() failed");
- return -EIO;
- }
-
- memset(&method_mask, 0, sizeof(method_mask));
- method_mask[0] = MAD_METHOD_MASK0;
- server.umad_agent.agent_id = umad_register(server.umad_agent.port_id,
- UMAD_CLASS_CM,
- UMAD_SA_CLASS_VERSION,
- MAD_RMPP_VERSION, method_mask);
- if (server.umad_agent.agent_id < 0) {
- syslog(LOG_WARNING, "umad_register() failed");
- return -EIO;
- }
-
- hash_tbl_alloc();
-
- return 0;
-}
-
-static void signal_handler(int sig, siginfo_t *siginfo, void *context)
-{
- static bool warned;
-
- /* Prevent stop if clients are connected */
- if (server.nfds != 1) {
- if (!warned) {
- syslog(LOG_WARNING,
- "Can't stop while active client exist, resend SIGINT to overid");
- warned = true;
- return;
- }
- }
-
- if (sig == SIGINT) {
- server.run = false;
- fini();
- }
-
- exit(0);
-}
-
-static int init(void)
-{
- int rc;
- struct sigaction sig = {};
-
- rc = init_listener();
- if (rc) {
- return rc;
- }
-
- rc = init_umad();
- if (rc) {
- return rc;
- }
-
- pthread_rwlock_init(&server.lock, 0);
-
- rc = pthread_create(&server.umad_recv_thread, NULL, umad_recv_thread_func,
- NULL);
- if (rc) {
- syslog(LOG_ERR, "Fail to create UMAD receiver thread (%d)\n", rc);
- return rc;
- }
-
- sig.sa_sigaction = &signal_handler;
- sig.sa_flags = SA_SIGINFO;
- rc = sigaction(SIGINT, &sig, NULL);
- if (rc < 0) {
- syslog(LOG_ERR, "Fail to install SIGINT handler (%d)\n", errno);
- return rc;
- }
-
- return 0;
-}
-
-int main(int argc, char *argv[])
-{
- int rc;
-
- memset(&server, 0, sizeof(server));
-
- parse_args(argc, argv);
-
- rc = init();
- if (rc) {
- syslog(LOG_ERR, "Fail to initialize server (%d)\n", rc);
- rc = -EAGAIN;
- goto out;
- }
-
- run();
-
-out:
- fini();
-
- return rc;
-}
projects / mirror_qemu.git / blobdiff