On 07/30/2012 10:59 AM, Sage Weil wrote:
> If the connect() call immediately fails such that sock == NULL, we
> still need con_close_socket() to reset our socket state to CLOSED.
> 
> Signed-off-by: Sage Weil <[email protected]>

Looks good.

I'm glad you're adding in dout() calls...  I hadn't been doing
that as I was working on the messenger code.

Reviewed-by: Alex Elder <[email protected]>

> ---
>  net/ceph/messenger.c |   26 +++++++++++++++++++-------
>  1 file changed, 19 insertions(+), 7 deletions(-)
> 
> diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
> index fa16f2c..a6a0c7a 100644
> --- a/net/ceph/messenger.c
> +++ b/net/ceph/messenger.c
> @@ -224,6 +224,8 @@ static void con_sock_state_init(struct ceph_connection 
> *con)
>       old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSED);
>       if (WARN_ON(old_state != CON_SOCK_STATE_NEW))
>               printk("%s: unexpected old state %d\n", __func__, old_state);
> +     dout("%s con %p sock %d -> %d\n", __func__, con, old_state,
> +          CON_SOCK_STATE_CLOSED);
>  }
>  
>  static void con_sock_state_connecting(struct ceph_connection *con)
> @@ -233,6 +235,8 @@ static void con_sock_state_connecting(struct 
> ceph_connection *con)
>       old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CONNECTING);
>       if (WARN_ON(old_state != CON_SOCK_STATE_CLOSED))
>               printk("%s: unexpected old state %d\n", __func__, old_state);
> +     dout("%s con %p sock %d -> %d\n", __func__, con, old_state,
> +          CON_SOCK_STATE_CONNECTING);
>  }
>  
>  static void con_sock_state_connected(struct ceph_connection *con)
> @@ -242,6 +246,8 @@ static void con_sock_state_connected(struct 
> ceph_connection *con)
>       old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CONNECTED);
>       if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTING))
>               printk("%s: unexpected old state %d\n", __func__, old_state);
> +     dout("%s con %p sock %d -> %d\n", __func__, con, old_state,
> +          CON_SOCK_STATE_CONNECTED);
>  }
>  
>  static void con_sock_state_closing(struct ceph_connection *con)
> @@ -253,6 +259,8 @@ static void con_sock_state_closing(struct ceph_connection 
> *con)
>                       old_state != CON_SOCK_STATE_CONNECTED &&
>                       old_state != CON_SOCK_STATE_CLOSING))
>               printk("%s: unexpected old state %d\n", __func__, old_state);
> +     dout("%s con %p sock %d -> %d\n", __func__, con, old_state,
> +          CON_SOCK_STATE_CLOSING);
>  }
>  
>  static void con_sock_state_closed(struct ceph_connection *con)
> @@ -262,8 +270,11 @@ static void con_sock_state_closed(struct ceph_connection 
> *con)
>       old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSED);
>       if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTED &&
>                   old_state != CON_SOCK_STATE_CLOSING &&
> -                 old_state != CON_SOCK_STATE_CONNECTING))
> +                 old_state != CON_SOCK_STATE_CONNECTING &&
> +                 old_state != CON_SOCK_STATE_CLOSED))
>               printk("%s: unexpected old state %d\n", __func__, old_state);
> +     dout("%s con %p sock %d -> %d\n", __func__, con, old_state,
> +          CON_SOCK_STATE_CLOSED);
>  }
>  
>  /*
> @@ -448,14 +459,14 @@ static int ceph_tcp_sendpage(struct socket *sock, 
> struct page *page,
>   */
>  static int con_close_socket(struct ceph_connection *con)
>  {
> -     int rc;
> +     int rc = 0;
>  
>       dout("con_close_socket on %p sock %p\n", con, con->sock);
> -     if (!con->sock)
> -             return 0;
> -     rc = con->sock->ops->shutdown(con->sock, SHUT_RDWR);
> -     sock_release(con->sock);
> -     con->sock = NULL;
> +     if (con->sock) {
> +             rc = con->sock->ops->shutdown(con->sock, SHUT_RDWR);
> +             sock_release(con->sock);
> +             con->sock = NULL;
> +     }
>  
>       /*
>        * Forcibly clear the SOCK_CLOSED flag.  It gets set
> @@ -464,6 +475,7 @@ static int con_close_socket(struct ceph_connection *con)
>        * shut the socket down.
>        */
>       clear_bit(CON_FLAG_SOCK_CLOSED, &con->flags);
> +
>       con_sock_state_closed(con);
>       return rc;
>  }
> 

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