src, tools: Set/get timeout and get qos for flows

Receiver timeouts can now be set on a flow using the flow_set_timeout
function. Specifying NULL disables the timeout.  The flow_get_timeout
function gets the value for the timeout.

This commit also deprecates fcntl in favor of flow_get_flags and
flow_set_flags functions.

struct qos_spec is typedef'd as a qosspec_t.

The tools and cdap.c are updated to use the new API.

Fixes a bug in operf client where the client's writer thread wouldn't
cancel on SIGINT.

1 files changed, 14 insertions, 54 deletions

diff --git a/src/tools/operf/operf_client.c b/src/tools/operf/operf_client.c
index 902a7b41..44f25893 100644
--- a/src/tools/operf/operf_client.c
+++ b/src/tools/operf/operf_client.c
@@ -22,6 +22,7 @@
  */
 
 #include <ouroboros/dev.h>
+#include <ouroboros/fcntl.h>
 #include <ouroboros/time_utils.h>
 
 #ifdef __FreeBSD__
@@ -45,6 +46,7 @@ static void busy_wait_until(const struct timespec * deadline)
         while (now.tv_sec == deadline->tv_sec
                && now.tv_nsec < deadline->tv_nsec)
                 clock_gettime(CLOCK_REALTIME, &now);
+        pthread_testcancel();
 }
 
 void shutdown_client(int signo, siginfo_t * info, void * c)
@@ -68,23 +70,20 @@ void * reader(void * o)
         struct timespec timeout = {2, 0};
 
         char buf[OPERF_BUF_SIZE];
-        int fd = 0;
+        int fd = *((int *) o);
         int msg_len = 0;
 
-        (void) o;
+        flow_set_timeout(fd, &timeout);
 
-        /* FIXME: use flow timeout option once we have it */
-        while (flow_event_wait(client.flows, client.fq, &timeout) != -ETIMEDOUT)
-                while ((fd = fqueue_next(client.fq)) >= 0) {
-                        msg_len = flow_read(fd, buf, OPERF_BUF_SIZE);
-                        if (msg_len != client.size) {
-                                printf("Invalid message on fd %d.\n", fd);
-                                continue;
-                        }
-
-                        ++client.rcvd;
+        while ((msg_len = flow_read(fd, buf, OPERF_BUF_SIZE)) != -ETIMEDOUT) {
+                if (msg_len != client.size) {
+                        printf("Invalid message on fd %d.\n", fd);
+                        continue;
                 }
 
+                ++client.rcvd;
+        }
+
         return (void *) 0;
 }
 
@@ -160,33 +159,6 @@ void * writer(void * o)
         return (void *) 0;
 }
 
-static int client_init(void)
-{
-        client.flows = flow_set_create();
-        if (client.flows == NULL)
-                return -ENOMEM;
-
-        client.fq = fqueue_create();
-        if (client.fq == NULL) {
-                flow_set_destroy(client.flows);
-                return -ENOMEM;
-        }
-
-        client.sent = 0;
-        client.rcvd = 0;
-
-        return 0;
-}
-
-void client_fini(void)
-{
-        if (client.flows != NULL)
-                flow_set_destroy(client.flows);
-
-        if (client.fq != NULL)
-                fqueue_destroy(client.fq);
-}
-
 int client_main(void)
 {
         struct sigaction sig_act;
@@ -208,32 +180,24 @@ int client_main(void)
                 return -1;
         }
 
-        if (client_init()) {
-                printf("Failed to initialize client.\n");
-                return -1;
-        }
+        client.sent = 0;
+        client.rcvd = 0;
 
         fd = flow_alloc(client.s_apn, NULL, NULL);
         if (fd < 0) {
-                flow_set_destroy(client.flows);
-                fqueue_destroy(client.fq);
                 printf("Failed to allocate flow.\n");
                 return -1;
         }
 
-        flow_set_add(client.flows, fd);
-
         if (flow_alloc_res(fd)) {
                 printf("Flow allocation refused.\n");
-                flow_set_del(client.flows, fd);
                 flow_dealloc(fd);
-                client_fini();
                 return -1;
         }
 
         clock_gettime(CLOCK_REALTIME, &tic);
 
-        pthread_create(&client.reader_pt, NULL, reader, NULL);
+        pthread_create(&client.reader_pt, NULL, reader, &fd);
         pthread_create(&client.writer_pt, NULL, writer, &fd);
 
         pthread_join(client.writer_pt, NULL);
@@ -253,11 +217,7 @@ int client_main(void)
                (client.rcvd * client.size * 8)
                / (double) ts_diff_us(&tic, &toc));
 
-        flow_set_del(client.flows, fd);
-
         flow_dealloc(fd);
 
-        client_fini();
-
         return 0;
 }