RDMA MAD kernel module (ibcm) disallow more than one MAD-agent for a
given MAD class.
This does not go hand-by-hand with qemu pvrdma device's requirements
where each VM is MAD agent.
Fix it by adding implementation of RDMA MAD multiplexer service which on
one hand register as a sole MAD agent with the kernel module and on the
other hand gives service to more than one VM.
Design Overview:
----------------
A server process is registered to UMAD framework (for this to work the
rdma_cm kernel module needs to be unloaded) and creates a unix socket to
listen to incoming request from clients.
A client process (such as QEMU) connects to this unix socket and
registers with its own GID.
TX:
---
When client needs to send rdma_cm MAD message it construct it the same
way as without this multiplexer, i.e. creates a umad packet but this
time it writes its content to the socket instead of calling umad_send().
The server, upon receiving such a message fetch local_comm_id from it so
a context for this session can be maintain and relay the message to UMAD
layer by calling umad_send().
RX:
---
The server creates a worker thread to process incoming rdma_cm MAD
messages. When an incoming message arrived (umad_recv()) the server,
depending on the message type (attr_id) looks for target client by
either searching in gid->fd table or in local_comm_id->fd table. With
the extracted fd the server relays to incoming message to the client.
Signed-off-by: Yuval Shaia <yuval.shaia@xxxxxxxxxx>
---
Makefile | 3 +
Makefile.objs | 1 +
contrib/rdmacm-mux/Makefile.objs | 3 +
contrib/rdmacm-mux/main.c | 680 +++++++++++++++++++++++++++++++
4 files changed, 687 insertions(+)
create mode 100644 contrib/rdmacm-mux/Makefile.objs
create mode 100644 contrib/rdmacm-mux/main.c
diff --git a/Makefile b/Makefile
index 2da686be33..9ef307ba6e 100644
--- a/Makefile
+++ b/Makefile
@@ -416,6 +416,7 @@ dummy := $(call unnest-vars,, \
qga-obj-y \
ivshmem-client-obj-y \
ivshmem-server-obj-y \
+ rdmacm-mux-obj-y \
libvhost-user-obj-y \
vhost-user-scsi-obj-y \
vhost-user-blk-obj-y \
@@ -717,6 +718,8 @@ vhost-user-scsi$(EXESUF): $(vhost-user-scsi-obj-y) libvhost-user.a
$(call LINK, $^)
vhost-user-blk$(EXESUF): $(vhost-user-blk-obj-y) libvhost-user.a
$(call LINK, $^)
+rdmacm-mux$(EXESUF): $(rdmacm-mux-obj-y) $(COMMON_LDADDS)
+ $(call LINK, $^)
module_block.h: $(SRC_PATH)/scripts/modules/module_block.py config-host.mak
$(call quiet-command,$(PYTHON) $< $@ \
diff --git a/Makefile.objs b/Makefile.objs
index 7a9828da28..8a7b6fc7b6 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -193,6 +193,7 @@ vhost-user-scsi.o-cflags := $(LIBISCSI_CFLAGS)
vhost-user-scsi.o-libs := $(LIBISCSI_LIBS)
vhost-user-scsi-obj-y = contrib/vhost-user-scsi/
vhost-user-blk-obj-y = contrib/vhost-user-blk/
+rdmacm-mux-obj-y = contrib/rdmacm-mux/
######################################################################
trace-events-subdirs =
diff --git a/contrib/rdmacm-mux/Makefile.objs b/contrib/rdmacm-mux/Makefile.objs
new file mode 100644
index 0000000000..416288fc36
--- /dev/null
+++ b/contrib/rdmacm-mux/Makefile.objs
@@ -0,0 +1,3 @@
+CFLAGS += -libumad -Wno-format-truncation
+rdmacm-mux-obj-y = main.o
+
diff --git a/contrib/rdmacm-mux/main.c b/contrib/rdmacm-mux/main.c
new file mode 100644
index 0000000000..cba9f48b00
--- /dev/null
+++ b/contrib/rdmacm-mux/main.c
@@ -0,0 +1,680 @@
+#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"
+
+#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_BUF_SIZE 256
+#define MAD_MGMT_CLASS 0x7
+#define MAD_MGMT_VERSION 2
+#define MAD_RMPP_VERSION 0
+#define MAD_METHOD_MASK0 0x8
+
+#define CM_REQ_ATTR_ID 0x0010
+#define CM_MRA_ATTR_ID 0x0011
+#define CM_REJ_ATTR_ID 0x0012
+#define CM_REP_ATTR_ID 0x0013
+#define CM_RTU_ATTR_ID 0x0014
+#define CM_DREQ_ATTR_ID 0x0015
+#define CM_DREP_ATTR_ID 0x0016
+#define CM_SIDR_REQ_ATTR_ID 0x0017
+#define CM_SIDR_REP_ATTR_ID 0x0018
+#define CM_LAP_ATTR_ID 0x0019
+#define CM_APR_ATTR_ID 0x001A
+
+#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"
+#define RDMA_DEVICE "rxe0"
+#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 */
+} CommId2FdEntry;
+
+typedef struct RdmaCmUMadAgent {
+ int port_id;
+ int agent_id;
+ GHashTable *gid2fd; /* Used to find fd of a given gid */
+ GHashTable *fd2gid; /* Used to find gid of a fd before it is closed */
+ 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;
+
+typedef struct RdmaCmUMad {
+ struct ib_user_mad hdr;
+ char mad[MAD_BUF_SIZE];
+} RdmaCmUMad;
+
+RdmaCMServer server = {0};
+
+void signal_handler(int signo);
+
+static void usage(const char *progname)
+{
+ printf("Usage: %s [OPTION]...\n"
+ "\t-h Show this help\n"
+ "\t-s unix-socket-path Path to unix socket to listen to (default %s)\n"
+ "\t-d rdma-device-name Name of RDMA device to register with (default %s)\n"
+ "\t-p rdma-device-port Port number of RDMA device to register with (default %d)\n",
+ progname, UNIX_SOCKET_PATH, RDMA_DEVICE, 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[PATH_MAX];
+
+ strcpy(unix_socket_path, UNIX_SOCKET_PATH);
+ strcpy(server.args.rdma_dev_name, RDMA_DEVICE);
+ 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);
+ break;
+
+ case 's':
+ /* This is temporary, final name will build below */
+ strcpy(unix_socket_path, optarg);
+ break;
+
+ case 'd':
+ strcpy(server.args.rdma_dev_name, optarg);
+ break;
+
+ case 'p':
+ server.args.rdma_port_num = atoi(optarg);
+ break;
+
+ default:
+ help(argv[0]);
+ exit(1);
+ break;
+ }
+ }
+
+ /* 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.fd2gid = g_hash_table_new_full(g_int_hash, g_int_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.fd2gid) {
+ g_hash_table_destroy(server.umad_agent.fd2gid);
+ }
+ if (server.umad_agent.gid2fd) {
+ g_hash_table_destroy(server.umad_agent.gid2fd);
+ }
+}
+
+static int hash_tbl_search_fd_by_gid(uint64_t gid)
+{
+ int *fd;
+
+ pthread_rwlock_rdlock(&server.lock);
+ fd = g_hash_table_lookup(server.umad_agent.gid2fd, &gid);
+ pthread_rwlock_unlock(&server.lock);
+
+ if (!fd) {
+ syslog(LOG_WARNING, "Can't find matching for gid 0x%lx\n", gid);
+ return -ENOENT;
+ }
+
+ return *fd;
+}
+
+static uint64_t hash_tbl_search_gid(int fd)
+{
+ uint64_t *gid;
+
+ pthread_rwlock_rdlock(&server.lock);
+ gid = g_hash_table_lookup(server.umad_agent.fd2gid, &fd);
+ pthread_rwlock_unlock(&server.lock);
+
+ if (!gid) {
+ syslog(LOG_WARNING, "Can't find matching for fd %d\n", fd);
+ return 0;
+ }
+
+ return *gid;
+}
+
+static int hash_tbl_search_fd_by_comm_id(uint32_t comm_id)
+{
+ 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 0;
+ }
+
+ return fde->fd;
+}
+
+static void hash_tbl_save_fd_gid_pair(int fd, uint64_t gid)
+{
+ pthread_rwlock_wrlock(&server.lock);
+ g_hash_table_insert(server.umad_agent.fd2gid, g_memdup(&fd, sizeof(fd)),
+ g_memdup(&gid, sizeof(gid)));
+ g_hash_table_insert(server.umad_agent.gid2fd, g_memdup(&gid, sizeof(gid)),
+ g_memdup(&fd, sizeof(fd)));
+ pthread_rwlock_unlock(&server.lock);
+}
+
+static void hash_tbl_save_fd_comm_id_pair(int fd, uint32_t comm_id)
+{
+ CommId2FdEntry fde = {fd, COMMID_TTL};
+
+ 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 void hash_tbl_remove_fd_gid_pair(int fd)
+{
+ uint64_t gid;
+
+ gid = hash_tbl_search_gid(fd);
+ if (!gid) {
+ return;
+ }
+
+ pthread_rwlock_wrlock(&server.lock);
+ g_hash_table_remove(server.umad_agent.fd2gid, &fd);
+ g_hash_table_remove(server.umad_agent.gid2fd, &gid);
+ pthread_rwlock_unlock(&server.lock);
+}
+
+static inline int get_fd(const char *mad)
+{
+ struct umad_hdr *hdr = (struct umad_hdr *)mad;
+ char *data = (char *)hdr + sizeof(*hdr);
+ int64_t gid;
+ int32_t comm_id;
+ uint16_t attr_id = be16toh(hdr->attr_id);
+
+ if (attr_id == CM_REQ_ATTR_ID) {
+ memcpy(&gid, data + CM_REQ_DGID_POS, sizeof(gid));
+ return hash_tbl_search_fd_by_gid(gid);
+ }
+
+ if (attr_id == CM_SIDR_REQ_ATTR_ID) {
+ memcpy(&gid, data + CM_SIDR_REQ_DGID_POS, sizeof(gid));
+ return hash_tbl_search_fd_by_gid(gid);
+ }
+
+ switch (attr_id) {
+ case CM_REP_ATTR_ID:
+ /* Fall through */
+ case CM_REJ_ATTR_ID:
+ /* Fall through */
+ case CM_DREQ_ATTR_ID:
+ /* Fall through */
+ case CM_DREP_ATTR_ID:
+ /* Fall through */
+ case CM_RTU_ATTR_ID:
+ data += sizeof(comm_id);
+ /* Fall through */
+ case CM_SIDR_REP_ATTR_ID:
+ memcpy(&comm_id, data, sizeof(comm_id));
+ return hash_tbl_search_fd_by_comm_id(comm_id);
+ }
+
+ syslog(LOG_WARNING, "Unsupported attr_id 0x%x\n", attr_id);
+
+ return 0;
+}
+
+static void *umad_recv_thread_func(void *args)
+{
+ int rc;
+ RdmaCmUMad umad = {0};
+ int len;
+ int fd;
+
+ while (server.run) {
+ do {
+ len = sizeof(umad.mad);
+ rc = umad_recv(server.umad_agent.port_id, &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) {
+ fd = get_fd(umad.mad);
+ if (!fd) {
+ continue;
+ }
+
+ send(fd, &umad, sizeof(umad), 0);
+ }
+ }
+
+ return NULL;
+}
+
+static int read_and_process(int fd)
+{
+ int rc;
+ RdmaCmUMad umad = {0};
+ struct umad_hdr *hdr;
+ uint32_t *comm_id;
+ uint16_t attr_id;
+
+ rc = recv(fd, &umad, sizeof(umad), 0);
+
+ if (rc < 0 && errno != EWOULDBLOCK) {
+ return EIO;
+ }
+
+ if (rc == 0) {
+ return EPIPE;
+ }
+
+ if (rc == sizeof(umad.hdr)) {
+ hash_tbl_save_fd_gid_pair(fd, umad.hdr.addr.ib_gid.global.interface_id);
+
+ syslog(LOG_INFO, "0x%llx registered on socket %d",
+ umad.hdr.addr.ib_gid.global.interface_id, fd);
+
+ return 0;
+ }
+
+ hdr = (struct umad_hdr *)umad.mad;
+ attr_id = be16toh(hdr->attr_id);
+
+ /* If this is REQ or REP then store the pair comm_id,fd to be later
+ * used for other messages where gid is unknown */
+ if ((attr_id == CM_REQ_ATTR_ID) || (attr_id == CM_DREQ_ATTR_ID) ||
+ (attr_id == CM_SIDR_REQ_ATTR_ID) || (attr_id == CM_REP_ATTR_ID) ||
+ (attr_id == CM_DREP_ATTR_ID)) {
+ comm_id = (uint32_t *)(umad.mad + sizeof(*hdr));
+ hash_tbl_save_fd_comm_id_pair(fd, *comm_id);
+ }
+
+ rc = umad_send(server.umad_agent.port_id, server.umad_agent.agent_id, &umad,
+ umad.hdr.length, 1, 0);
+ if (rc) {
+ syslog(LOG_WARNING, "Fail to send MAD message, err=%d", rc);
+ }
+
+ return rc;
+}
+
+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;
+ }
+
+ 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 close_fd(int idx)
+{
+ int i;
+
+ close(server.fds[idx].fd);
+ syslog(LOG_INFO, "Socket %d closed\n", server.fds[idx].fd);
+ hash_tbl_remove_fd_gid_pair(server.fds[idx].fd);
+
+ pthread_rwlock_wrlock(&server.lock);
+
+ server.nfds--;
+ for (i = idx; i < server.nfds; i++) {
+ server.fds[i].fd = server.fds[i + 1].fd;
+ }
+
+ pthread_rwlock_unlock(&server.lock);
+}
+
+static void run(void)
+{
+ int rc, nfds, i;
+
+ 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++) {
+ 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);
+ server.fds[i].revents = 0;
+ i--; /* Adjusting index since we just close this one */
+ }
+ continue;
+ }
+
+ if (i == 0) {
+ rc = accept_all();
+ if (rc) {
+ continue;
+ }
+ } else {
+ rc = read_and_process(server.fds[i].fd);
+ if (rc) {
+ close_fd(i);
+ server.fds[i].revents = 0;
+ i--; /* Adjusting index since we just close this one */
+ }
+ }
+ }
+ }
+}
+
+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_WARNING, "socket() failed");
+ return EIO;
+ }
+
+ rc = setsockopt(server.fds[0].fd, SOL_SOCKET, SO_REUSEADDR, (char *)&on,
+ sizeof(on));
+ if (rc < 0) {
+ syslog(LOG_WARNING, "setsockopt() failed");
+ return EIO;
+ }
+
+ rc = ioctl(server.fds[0].fd, FIONBIO, (char *)&on);
+ if (rc < 0) {
+ syslog(LOG_WARNING, "ioctl() failed");
+ return EIO;
+ }
+
+ 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_DEBUG, "Could not copy unix socket path\n");
+ return EINVAL;
+ }
+
+ rc = bind(server.fds[0].fd, (struct sockaddr *)&sun, sizeof(sun));
+ if (rc < 0) {
+ syslog(LOG_WARNING, "bind() failed");
+ return EIO;
+ }
+
+ rc = listen(server.fds[0].fd, SERVER_LISTEN_BACKLOG);
+ if (rc < 0) {
+ syslog(LOG_WARNING, "listen() failed");
+ return EIO;
+ }
+
+ server.fds[0].events = POLLIN;
+ server.nfds = 1;
+ server.run = true;
+
+ return 0;
+}
+
+static int init_umad(void)
+{
+ long method_mask[1];
+
+ 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;
+ }
+
+ method_mask[0] = MAD_METHOD_MASK0;
+ server.umad_agent.agent_id = umad_register(server.umad_agent.port_id,
+ MAD_MGMT_CLASS, MAD_MGMT_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;
+}
+
+void signal_handler(int signo)
+{
+ static bool warned = false;
+
+ /* 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 (signo == SIGINT) {
+ server.run = false;
+ fini();
+ }
+
+ exit(0);
+}
+
+static int init(void)
+{
+ int rc;
+
+ 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) {
+ return rc;
+ }
+
+ return 0;
+}
+
+int main(int argc, char *argv[])
+{
+ int rc;
+
+ if (signal(SIGINT, signal_handler) == SIG_ERR) {
+ syslog(LOG_ERR, "Fail to install SIGINT handler\n");
+ return EAGAIN;
+ }
+
+ 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;
+}
--
2.17.1
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