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| author | Hendrik Brueckner <brueckner@linux.vnet.ibm.com> | 2009-04-21 23:26:21 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-04-23 04:04:30 -0700 |
| commit | af88b52def76679c8c5bcdbed199fbe62b6a16d4 (patch) | |
| tree | a53c8d8f27a5b19cf10e5ca97abcad48261f7c1e /net/iucv | |
| parent | 42e1b4c2c6c823ae26e64c557addf5329a7735b7 (diff) | |
| download | linux-af88b52def76679c8c5bcdbed199fbe62b6a16d4.tar.gz | |
af_iucv: sync sk shutdown flag if iucv path is quiesced
If the af_iucv communication partner quiesces the path to shutdown its
receive direction, provide a quiesce callback implementation to shutdown
the (local) send direction. This ensures that both sides are synchronized.
Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/iucv')
| -rw-r--r-- | net/iucv/af_iucv.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c index 49e786535dc8..6cf02b41ef95 100644 --- a/net/iucv/af_iucv.c +++ b/net/iucv/af_iucv.c @@ -54,6 +54,7 @@ static void iucv_callback_connack(struct iucv_path *, u8 ipuser[16]); static int iucv_callback_connreq(struct iucv_path *, u8 ipvmid[8], u8 ipuser[16]); static void iucv_callback_connrej(struct iucv_path *, u8 ipuser[16]); +static void iucv_callback_shutdown(struct iucv_path *, u8 ipuser[16]); static struct iucv_sock_list iucv_sk_list = { .lock = __RW_LOCK_UNLOCKED(iucv_sk_list.lock), @@ -65,7 +66,8 @@ static struct iucv_handler af_iucv_handler = { .path_complete = iucv_callback_connack, .path_severed = iucv_callback_connrej, .message_pending = iucv_callback_rx, - .message_complete = iucv_callback_txdone + .message_complete = iucv_callback_txdone, + .path_quiesced = iucv_callback_shutdown, }; static inline void high_nmcpy(unsigned char *dst, char *src) @@ -1196,6 +1198,21 @@ static void iucv_callback_connrej(struct iucv_path *path, u8 ipuser[16]) sk->sk_state_change(sk); } +/* called if the other communication side shuts down its RECV direction; + * in turn, the callback sets SEND_SHUTDOWN to disable sending of data. + */ +static void iucv_callback_shutdown(struct iucv_path *path, u8 ipuser[16]) +{ + struct sock *sk = path->private; + + bh_lock_sock(sk); + if (sk->sk_state != IUCV_CLOSED) { + sk->sk_shutdown |= SEND_SHUTDOWN; + sk->sk_state_change(sk); + } + bh_unlock_sock(sk); +} + static struct proto_ops iucv_sock_ops = { .family = PF_IUCV, .owner = THIS_MODULE, |