#include <linux/kthread.h>
#include "zfcp_ext.h"
#include "zfcp_reqlist.h"

Macros
#define	KMSG_COMPONENT "zfcp"

#define	pr_fmt(fmt) KMSG_COMPONENT ": " fmt

#define	ZFCP_MAX_ERPS 3

Enumerations
enum	zfcp_erp_act_flags { ZFCP_STATUS_ERP_TIMEDOUT = 0x10000000, ZFCP_STATUS_ERP_CLOSE_ONLY = 0x01000000, ZFCP_STATUS_ERP_DISMISSING = 0x00100000, ZFCP_STATUS_ERP_DISMISSED = 0x00200000, ZFCP_STATUS_ERP_LOWMEM = 0x00400000, ZFCP_STATUS_ERP_NO_REF = 0x00800000 }

enum	zfcp_erp_steps { ZFCP_ERP_STEP_UNINITIALIZED = 0x0000, ZFCP_ERP_STEP_FSF_XCONFIG = 0x0001, ZFCP_ERP_STEP_PHYS_PORT_CLOSING = 0x0010, ZFCP_ERP_STEP_PORT_CLOSING = 0x0100, ZFCP_ERP_STEP_PORT_OPENING = 0x0800, ZFCP_ERP_STEP_LUN_CLOSING = 0x1000, ZFCP_ERP_STEP_LUN_OPENING = 0x2000 }

enum	zfcp_erp_act_type { ZFCP_ERP_ACTION_REOPEN_LUN = 1, ZFCP_ERP_ACTION_REOPEN_PORT = 2, ZFCP_ERP_ACTION_REOPEN_PORT_FORCED = 3, ZFCP_ERP_ACTION_REOPEN_ADAPTER = 4 }

enum	zfcp_erp_act_state { ZFCP_ERP_ACTION_RUNNING = 1, ZFCP_ERP_ACTION_READY = 2 }

enum	zfcp_erp_act_result { ZFCP_ERP_SUCCEEDED = 0, ZFCP_ERP_FAILED = 1, ZFCP_ERP_CONTINUES = 2, ZFCP_ERP_EXIT = 3, ZFCP_ERP_DISMISSED = 4, ZFCP_ERP_NOMEM = 5 }

Functions
void	zfcp_erp_adapter_reopen (struct zfcp_adapter adapter, int clear, char id)

void	zfcp_erp_adapter_shutdown (struct zfcp_adapter adapter, int clear, char id)

void	zfcp_erp_port_shutdown (struct zfcp_port port, int clear, char id)

void	zfcp_erp_port_forced_reopen (struct zfcp_port port, int clear, char id)

int	zfcp_erp_port_reopen (struct zfcp_port port, int clear, char id)

void	zfcp_erp_lun_reopen (struct scsi_device sdev, int clear, char id)

void	zfcp_erp_lun_shutdown (struct scsi_device sdev, int clear, char id)

void	zfcp_erp_lun_shutdown_wait (struct scsi_device sdev, char id)

void	zfcp_erp_notify (struct zfcp_erp_action *erp_action, unsigned long set_mask)

void	zfcp_erp_timeout_handler (unsigned long data)

int	zfcp_erp_thread_setup (struct zfcp_adapter *adapter)

void	zfcp_erp_thread_kill (struct zfcp_adapter *adapter)

void	zfcp_erp_wait (struct zfcp_adapter *adapter)

void	zfcp_erp_set_adapter_status (struct zfcp_adapter *adapter, u32 mask)

void	zfcp_erp_clear_adapter_status (struct zfcp_adapter *adapter, u32 mask)

void	zfcp_erp_set_port_status (struct zfcp_port *port, u32 mask)

void	zfcp_erp_clear_port_status (struct zfcp_port *port, u32 mask)

void	zfcp_erp_set_lun_status (struct scsi_device *sdev, u32 mask)

void	zfcp_erp_clear_lun_status (struct scsi_device *sdev, u32 mask)

Macro Definition Documentation

#define KMSG_COMPONENT "zfcp"

Definition at line 9 of file zfcp_erp.c.

#define pr_fmt ( fmt ) KMSG_COMPONENT ": " fmt

Definition at line 10 of file zfcp_erp.c.

#define ZFCP_MAX_ERPS 3

Definition at line 16 of file zfcp_erp.c.

Enumeration Type Documentation

enum zfcp_erp_act_flags

Enumerator:

ZFCP_STATUS_ERP_TIMEDOUT
ZFCP_STATUS_ERP_CLOSE_ONLY
ZFCP_STATUS_ERP_DISMISSING
ZFCP_STATUS_ERP_DISMISSED
ZFCP_STATUS_ERP_LOWMEM
ZFCP_STATUS_ERP_NO_REF

Definition at line 18 of file zfcp_erp.c.

enum zfcp_erp_act_result

Enumerator:

ZFCP_ERP_SUCCEEDED
ZFCP_ERP_FAILED
ZFCP_ERP_CONTINUES
ZFCP_ERP_EXIT
ZFCP_ERP_DISMISSED
ZFCP_ERP_NOMEM

Definition at line 49 of file zfcp_erp.c.

enum zfcp_erp_act_state

Enumerator:

ZFCP_ERP_ACTION_RUNNING
ZFCP_ERP_ACTION_READY

Definition at line 44 of file zfcp_erp.c.

enum zfcp_erp_act_type

Enumerator:

ZFCP_ERP_ACTION_REOPEN_LUN
ZFCP_ERP_ACTION_REOPEN_PORT
ZFCP_ERP_ACTION_REOPEN_PORT_FORCED
ZFCP_ERP_ACTION_REOPEN_ADAPTER

Definition at line 37 of file zfcp_erp.c.

enum zfcp_erp_steps

Enumerator:

ZFCP_ERP_STEP_UNINITIALIZED
ZFCP_ERP_STEP_FSF_XCONFIG
ZFCP_ERP_STEP_PHYS_PORT_CLOSING
ZFCP_ERP_STEP_PORT_CLOSING
ZFCP_ERP_STEP_PORT_OPENING
ZFCP_ERP_STEP_LUN_CLOSING
ZFCP_ERP_STEP_LUN_OPENING

Definition at line 27 of file zfcp_erp.c.

Function Documentation

void zfcp_erp_adapter_reopen	(	struct zfcp_adapter *	adapter,
		int	clear,
		char *	id
	)

zfcp_erp_adapter_reopen - Reopen adapter. : Adapter to reopen. : Status flags to clear. : Id for debug trace event.

Definition at line 286 of file zfcp_erp.c.

void zfcp_erp_adapter_shutdown	(	struct zfcp_adapter *	adapter,
		int	clear,
		char *	id
	)

zfcp_erp_adapter_shutdown - Shutdown adapter. : Adapter to shut down. : Status flags to clear. : Id for debug trace event.

Definition at line 309 of file zfcp_erp.c.

void zfcp_erp_clear_adapter_status	(	struct zfcp_adapter *	adapter,
		u32	mask
	)

zfcp_erp_clear_adapter_status - clear adapter status bits : adapter to change the status : status bits to change

Changes in common status bits are propagated to attached ports and LUNs.

Definition at line 1449 of file zfcp_erp.c.

void zfcp_erp_clear_lun_status	(	struct scsi_device *	sdev,
		u32	mask
	)

zfcp_erp_clear_lun_status - clear lun status bits : SCSi device / lun to clear the status bits : status bits to change

Definition at line 1550 of file zfcp_erp.c.

void zfcp_erp_clear_port_status	(	struct zfcp_port *	port,
		u32	mask
	)

zfcp_erp_clear_port_status - clear port status bits : adapter to change the status : status bits to change

Changes in common status bits are propagated to attached LUNs.

Definition at line 1510 of file zfcp_erp.c.

void zfcp_erp_lun_reopen	(	struct scsi_device *	sdev,
		int	clear,
		char *	id
	)

zfcp_erp_lun_reopen - initiate reopen of a LUN : SCSI device / LUN to be reopened : specifies flags in LUN status to be cleared : Id for debug trace event.

Return: 0 on success, < 0 on error

Definition at line 428 of file zfcp_erp.c.

void zfcp_erp_lun_shutdown	(	struct scsi_device *	sdev,
		int	clear,
		char *	id
	)

zfcp_erp_lun_shutdown - Shutdown LUN : SCSI device / LUN to shut down. : Status flags to clear. : Id for debug trace event.

Definition at line 446 of file zfcp_erp.c.

void zfcp_erp_lun_shutdown_wait	(	struct scsi_device *	sdev,
		char *	id
	)

zfcp_erp_lun_shutdown_wait - Shutdown LUN and wait for erp completion : SCSI device / LUN to shut down. : Id for debug trace event.

Do not acquire a reference for the LUN when creating the ERP action. It is safe, because this function waits for the ERP to complete first. This allows to shutdown the LUN, even when the SCSI device is in the state SDEV_DEL when scsi_device_get will fail.

Definition at line 462 of file zfcp_erp.c.

void zfcp_erp_notify	(	struct zfcp_erp_action *	erp_action,
		unsigned long	set_mask
	)

zfcp_erp_notify - Trigger ERP action. : ERP action to continue. : ERP action status flags to set.

Definition at line 542 of file zfcp_erp.c.

void zfcp_erp_port_forced_reopen	(	struct zfcp_port *	port,
		int	clear,
		char *	id
	)

zfcp_erp_port_forced_reopen - Forced close of port and open again : Port to force close and to reopen. : Status flags to clear. : Id for debug trace event.

Definition at line 353 of file zfcp_erp.c.

int zfcp_erp_port_reopen	(	struct zfcp_port *	port,
		int	clear,
		char *	id
	)

zfcp_erp_port_reopen - trigger remote port recovery : port to recover : flags in port status to be cleared : Id for debug trace event.

Returns 0 if recovery has been triggered, < 0 if not.

Definition at line 386 of file zfcp_erp.c.

void zfcp_erp_port_shutdown	(	struct zfcp_port *	port,
		int	clear,
		char *	id
	)

zfcp_erp_port_shutdown - Shutdown port : Port to shut down. : Status flags to clear. : Id for debug trace event.

Definition at line 322 of file zfcp_erp.c.

void zfcp_erp_set_adapter_status	(	struct zfcp_adapter *	adapter,
		u32	mask
	)

zfcp_erp_set_adapter_status - set adapter status bits : adapter to change the status : status bits to change

Changes in common status bits are propagated to attached ports and LUNs.

Definition at line 1421 of file zfcp_erp.c.

void zfcp_erp_set_lun_status	(	struct scsi_device *	sdev,
		u32	mask
	)

zfcp_erp_set_lun_status - set lun status bits : SCSI device / lun to set the status bits : status bits to change

Definition at line 1538 of file zfcp_erp.c.

void zfcp_erp_set_port_status	(	struct zfcp_port *	port,
		u32	mask
	)

zfcp_erp_set_port_status - set port status bits : port to change the status : status bits to change

Changes in common status bits are propagated to attached LUNs.

Definition at line 1487 of file zfcp_erp.c.

void zfcp_erp_thread_kill ( struct zfcp_adapter * adapter )

zfcp_erp_thread_kill - Stop ERP thread. : Adapter where the ERP thread should be stopped.

The caller of this routine ensures that the specified adapter has been shut down and that this operation has been completed. Thus, there are no pending erp_actions which would need to be handled here.

Definition at line 1395 of file zfcp_erp.c.

int zfcp_erp_thread_setup ( struct zfcp_adapter * adapter )

zfcp_erp_thread_setup - Start ERP thread for adapter : Adapter to start the ERP thread for

Returns 0 on success or error code from kernel_thread()

Definition at line 1370 of file zfcp_erp.c.

void zfcp_erp_timeout_handler ( unsigned long data )

zfcp_erp_timeout_handler - Trigger ERP action from timed out ERP request : ERP action (from timer data)

Definition at line 559 of file zfcp_erp.c.

void zfcp_erp_wait ( struct zfcp_adapter * adapter )

zfcp_erp_wait - wait for completion of error recovery on an adapter : adapter for which to wait for completion of its error recovery

Definition at line 1407 of file zfcp_erp.c.

Macros

Enumerations

Functions

Macro Definition Documentation

Enumeration Type Documentation

Function Documentation