| /* |
| * 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); |
| 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; |
| } |