* [Qemu-devel] [PATCH] nbd: use client_close() when negotiate phase fails
@ 2016-01-19 11:50 Daniel P. Berrange
2016-01-19 12:08 ` Paolo Bonzini
0 siblings, 1 reply; 2+ messages in thread
From: Daniel P. Berrange @ 2016-01-19 11:50 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, Fam Zheng, qemu-block
When nbd_negotiate() fails, nbd_co_client_start() is
directly calling client->close(). This eventually
ends up calling nbd_client_put(), which does an
assert(client->closing). Unfortunately we have not
set the 'closing' flag, so the code now aborts. This
bug was accidentally introduced in
commit ee7d7aabdaea4484e069cb99c9fc54e8cb24b56f
Author: Fam Zheng <famz@redhat.com>
Date: Thu Jan 14 16:41:01 2016 +0800
nbd: Always call "close_fn" in nbd_client_new
The simple fix is to not directly call client->close()
but instead call the client_close() method, which
takes care todo the right sequence of steps to close
the client.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
nbd/server.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/nbd/server.c b/nbd/server.c
index eead339..c29ba5f 100644
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -1080,8 +1080,7 @@ static coroutine_fn void nbd_co_client_start(void *opaque)
nbd_export_get(exp);
}
if (nbd_negotiate(data)) {
- shutdown(client->sock, 2);
- client->close(client);
+ client_close(client);
goto out;
}
qemu_co_mutex_init(&client->send_lock);
--
2.5.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [Qemu-devel] [PATCH] nbd: use client_close() when negotiate phase fails
2016-01-19 11:50 [Qemu-devel] [PATCH] nbd: use client_close() when negotiate phase fails Daniel P. Berrange
@ 2016-01-19 12:08 ` Paolo Bonzini
0 siblings, 0 replies; 2+ messages in thread
From: Paolo Bonzini @ 2016-01-19 12:08 UTC (permalink / raw)
To: Daniel P. Berrange, qemu-devel; +Cc: Fam Zheng, qemu-block
On 19/01/2016 12:50, Daniel P. Berrange wrote:
> When nbd_negotiate() fails, nbd_co_client_start() is
> directly calling client->close(). This eventually
> ends up calling nbd_client_put(), which does an
> assert(client->closing). Unfortunately we have not
> set the 'closing' flag, so the code now aborts. This
> bug was accidentally introduced in
>
> commit ee7d7aabdaea4484e069cb99c9fc54e8cb24b56f
> Author: Fam Zheng <famz@redhat.com>
> Date: Thu Jan 14 16:41:01 2016 +0800
>
> nbd: Always call "close_fn" in nbd_client_new
>
> The simple fix is to not directly call client->close()
> but instead call the client_close() method, which
> takes care todo the right sequence of steps to close
> the client.
>
> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Good catch, thanks.
Paolo
> ---
> nbd/server.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/nbd/server.c b/nbd/server.c
> index eead339..c29ba5f 100644
> --- a/nbd/server.c
> +++ b/nbd/server.c
> @@ -1080,8 +1080,7 @@ static coroutine_fn void nbd_co_client_start(void *opaque)
> nbd_export_get(exp);
> }
> if (nbd_negotiate(data)) {
> - shutdown(client->sock, 2);
> - client->close(client);
> + client_close(client);
> goto out;
> }
> qemu_co_mutex_init(&client->send_lock);
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2016-01-19 12:08 ` Paolo Bonzini
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