[PATCH 2/7] block/nbd: use uniformly nbd_client_connecting_wait

[Roman Kagan]

Use nbd_client_connecting_wait uniformly all over the block/nbd.c.

While at this, drop the redundant check for nbd_client_connecting_wait
in reconnect_delay_timer_init, as all its callsites do this check too.

Signed-off-by: Roman Kagan <rvka...@yandex-team.ru>
---
 block/nbd.c | 34 +++++++++++++++-------------------
 1 file changed, 15 insertions(+), 19 deletions(-)

diff --git a/block/nbd.c b/block/nbd.c
index 447d176b76..1d8edb5b21 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -165,6 +165,18 @@ static void nbd_clear_bdrvstate(BDRVNBDState *s)
     s->x_dirty_bitmap = NULL;
 }
 
+static bool nbd_client_connecting(BDRVNBDState *s)
+{
+    NBDClientState state = qatomic_load_acquire(&s->state);
+    return state == NBD_CLIENT_CONNECTING_WAIT ||
+        state == NBD_CLIENT_CONNECTING_NOWAIT;
+}
+
+static bool nbd_client_connecting_wait(BDRVNBDState *s)
+{
+    return qatomic_load_acquire(&s->state) == NBD_CLIENT_CONNECTING_WAIT;
+}
+
 static void nbd_channel_error(BDRVNBDState *s, int ret)
 {
     if (ret == -EIO) {
@@ -205,7 +217,7 @@ static void reconnect_delay_timer_cb(void *opaque)
 {
     BDRVNBDState *s = opaque;
 
-    if (qatomic_load_acquire(&s->state) == NBD_CLIENT_CONNECTING_WAIT) {
+    if (nbd_client_connecting_wait(s)) {
         s->state = NBD_CLIENT_CONNECTING_NOWAIT;
         while (qemu_co_enter_next(&s->free_sema, NULL)) {
             /* Resume all queued requests */
@@ -217,10 +229,6 @@ static void reconnect_delay_timer_cb(void *opaque)
 
 static void reconnect_delay_timer_init(BDRVNBDState *s, uint64_t 
expire_time_ns)
 {
-    if (qatomic_load_acquire(&s->state) != NBD_CLIENT_CONNECTING_WAIT) {
-        return;
-    }
-
     assert(!s->reconnect_delay_timer);
     s->reconnect_delay_timer = aio_timer_new(bdrv_get_aio_context(s->bs),
                                              QEMU_CLOCK_REALTIME,
@@ -346,18 +354,6 @@ static void nbd_teardown_connection(BlockDriverState *bs)
     assert(!s->connection_co);
 }
 
-static bool nbd_client_connecting(BDRVNBDState *s)
-{
-    NBDClientState state = qatomic_load_acquire(&s->state);
-    return state == NBD_CLIENT_CONNECTING_WAIT ||
-        state == NBD_CLIENT_CONNECTING_NOWAIT;
-}
-
-static bool nbd_client_connecting_wait(BDRVNBDState *s)
-{
-    return qatomic_load_acquire(&s->state) == NBD_CLIENT_CONNECTING_WAIT;
-}
-
 static void connect_bh(void *opaque)
 {
     BDRVNBDState *state = opaque;
@@ -667,7 +663,7 @@ static coroutine_fn void nbd_co_reconnect_loop(BDRVNBDState 
*s)
     uint64_t timeout = 1 * NANOSECONDS_PER_SECOND;
     uint64_t max_timeout = 16 * NANOSECONDS_PER_SECOND;
 
-    if (qatomic_load_acquire(&s->state) == NBD_CLIENT_CONNECTING_WAIT) {
+    if (nbd_client_connecting_wait(s)) {
         reconnect_delay_timer_init(s, qemu_clock_get_ns(QEMU_CLOCK_REALTIME) +
                                    s->reconnect_delay * 
NANOSECONDS_PER_SECOND);
     }
@@ -2473,7 +2469,7 @@ static void nbd_cancel_in_flight(BlockDriverState *bs)
 
     reconnect_delay_timer_del(s);
 
-    if (s->state == NBD_CLIENT_CONNECTING_WAIT) {
+    if (nbd_client_connecting_wait(s)) {
         s->state = NBD_CLIENT_CONNECTING_NOWAIT;
         qemu_co_queue_restart_all(&s->free_sema);
     }
-- 
2.30.2