[Qemu-devel] [PATCH 03/12] nbd: Mark fd handlers client type as "external"

[Fam Zheng <famz@redhat.com>]

So we could distinguish it from internal used fds, thus avoid handling
unwanted events in nested aio polls.

Signed-off-by: Fam Zheng <famz@redhat.com>
---
 include/block/aio.h | 1 +
 nbd.c               | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/block/aio.h b/include/block/aio.h
index 830a0e8..60e796b 100644
--- a/include/block/aio.h
+++ b/include/block/aio.h
@@ -276,6 +276,7 @@ bool aio_pending(AioContext *ctx);
 bool aio_dispatch(AioContext *ctx);
 
 #define AIO_CLIENT_UNSPECIFIED    (1 << 0)
+#define AIO_CLIENT_EXTERNAL       (1 << 1)
 #define AIO_CLIENT_MASK_ALL       -1
 
 /* Progress in completing AIO work to occur.  This can issue new pending
diff --git a/nbd.c b/nbd.c
index 16a4087..96fcc98 100644
--- a/nbd.c
+++ b/nbd.c
@@ -1446,7 +1446,7 @@ static void nbd_set_handlers(NBDClient *client)
 {
     if (client->exp && client->exp->ctx) {
         aio_set_fd_handler(client->exp->ctx, client->sock,
-                           AIO_CLIENT_UNSPECIFIED,
+                           AIO_CLIENT_EXTERNAL,
                            client->can_read ? nbd_read : NULL,
                            client->send_coroutine ? nbd_restart_write : NULL,
                            client);
@@ -1457,7 +1457,7 @@ static void nbd_unset_handlers(NBDClient *client)
 {
     if (client->exp && client->exp->ctx) {
         aio_set_fd_handler(client->exp->ctx, client->sock,
-                           AIO_CLIENT_UNSPECIFIED, NULL, NULL, NULL);
+                           AIO_CLIENT_EXTERNAL, NULL, NULL, NULL);
     }
 }
 
-- 
2.5.3