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linux_old1/net/smc/smc_close.h

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smc: socket closing and linkgroup cleanup smc_shutdown() and smc_release() handling delayed linkgroup cleanup for linkgroups without connections Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-09 23:55:25 +08:00
/*
* Shared Memory Communications over RDMA (SMC-R) and RoCE
*
* Socket Closing
*
* Copyright IBM Corp. 2016
*
* Author(s): Ursula Braun <ubraun@linux.vnet.ibm.com>
*/
#ifndef SMC_CLOSE_H
#define SMC_CLOSE_H
#include <linux/workqueue.h>
#include "smc.h"
#define SMC_MAX_STREAM_WAIT_TIMEOUT (2 * HZ)
#define SMC_CLOSE_SOCK_PUT_DELAY HZ
void smc_close_wake_tx_prepared(struct smc_sock *smc);
void smc_close_active_abort(struct smc_sock *smc);
int smc_close_active(struct smc_sock *smc);
void smc_close_sock_put_work(struct work_struct *work);
int smc_close_shutdown_write(struct smc_sock *smc);
net/smc: no socket state changes in tasklet context Several state changes occur during SMC socket closing. Currently state changes triggered locally occur in process context with lock_sock() taken while state changes triggered by peer occur in tasklet context with bh_lock_sock() taken. bh_lock_sock() does not wait till a lock_sock(() task in process context is finished. This may lead to races in socket state transitions resulting in dangling SMC-sockets, or it may lead to duplicate SMC socket freeing. This patch introduces a closing worker to run all state changes under lock_sock(). Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com> Reviewed-by: Thomas Richter <tmricht@linux.vnet.ibm.com> Reported-by: Dave Jones <davej@codemonkey.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-10 20:58:01 +08:00
void smc_close_init(struct smc_sock *smc);
smc: socket closing and linkgroup cleanup smc_shutdown() and smc_release() handling delayed linkgroup cleanup for linkgroups without connections Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-09 23:55:25 +08:00
#endif /* SMC_CLOSE_H */