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[SCSI] zfcp: Cleanup code in zfcp_erp.c

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Cleanup the code in zfcp_erp.c, move erp internal definititions to
this file and move FSF timeout handling to the FSF layer.

Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Christof Schmitt 2008-07-02 10:56:40 +02:00 committed by James Bottomley
parent c41f8cbddd
commit 287ac01acf
4 changed files with 1510 additions and 2433 deletions
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45
drivers/s390/scsi/zfcp_def.h
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@ -91,17 +91,11 @@ zfcp_address_to_sg(void *address, struct scatterlist *list, unsigned int size)
/* max. number of (data buffer) SBALEs in largest SBAL chain
multiplied with number of sectors per 4k block */
#define ZFCP_TYPE2_RECOVERY_TIME 8 /* seconds */
/********************* FSF SPECIFIC DEFINES *********************************/
/* ATTENTION: value must not be used by hardware */
#define FSF_QTCB_UNSOLICITED_STATUS 0x6305
/* Do 1st retry in 1 second, then double the timeout for each following retry */
#define ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP 1
#define ZFCP_EXCHANGE_CONFIG_DATA_RETRIES 7
/* timeout value for "default timer" for fsf requests */
#define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ)
@ -349,45 +343,6 @@ struct zfcp_rc_entry {
#define ZFCP_STATUS_FSFREQ_RETRY 0x00000800
#define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000
/*********************** ERROR RECOVERY PROCEDURE DEFINES ********************/
#define ZFCP_MAX_ERPS 3
#define ZFCP_ERP_FSFREQ_TIMEOUT (30 * HZ)
#define ZFCP_ERP_MEMWAIT_TIMEOUT HZ
#define ZFCP_STATUS_ERP_TIMEDOUT 0x10000000
#define ZFCP_STATUS_ERP_CLOSE_ONLY 0x01000000
#define ZFCP_STATUS_ERP_DISMISSING 0x00100000
#define ZFCP_STATUS_ERP_DISMISSED 0x00200000
#define ZFCP_STATUS_ERP_LOWMEM 0x00400000
#define ZFCP_ERP_STEP_UNINITIALIZED 0x00000000
#define ZFCP_ERP_STEP_FSF_XCONFIG 0x00000001
#define ZFCP_ERP_STEP_PHYS_PORT_CLOSING 0x00000010
#define ZFCP_ERP_STEP_PORT_CLOSING 0x00000100
#define ZFCP_ERP_STEP_NAMESERVER_OPEN 0x00000200
#define ZFCP_ERP_STEP_NAMESERVER_LOOKUP 0x00000400
#define ZFCP_ERP_STEP_PORT_OPENING 0x00000800
#define ZFCP_ERP_STEP_UNIT_CLOSING 0x00001000
#define ZFCP_ERP_STEP_UNIT_OPENING 0x00002000
/* Ordered by escalation level (necessary for proper erp-code operation) */
#define ZFCP_ERP_ACTION_REOPEN_ADAPTER 0x4
#define ZFCP_ERP_ACTION_REOPEN_PORT_FORCED 0x3
#define ZFCP_ERP_ACTION_REOPEN_PORT 0x2
#define ZFCP_ERP_ACTION_REOPEN_UNIT 0x1
#define ZFCP_ERP_ACTION_RUNNING 0x1
#define ZFCP_ERP_ACTION_READY 0x2
#define ZFCP_ERP_SUCCEEDED 0x0
#define ZFCP_ERP_FAILED 0x1
#define ZFCP_ERP_CONTINUES 0x2
#define ZFCP_ERP_EXIT 0x3
#define ZFCP_ERP_DISMISSED 0x4
#define ZFCP_ERP_NOMEM 0x5
/************************* STRUCTURE DEFINITIONS *****************************/
struct zfcp_fsf_req;

3830
drivers/s390/scsi/zfcp_erp.c
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File diff suppressed because it is too large Load Diff

25
drivers/s390/scsi/zfcp_ext.h
View File

@ -67,8 +67,6 @@ extern int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *,
struct fsf_qtcb_bottom_port *);
extern struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
struct zfcp_fsf_cfdc *fsf_cfdc);
extern void zfcp_fsf_start_timer(struct zfcp_fsf_req *, unsigned long);
extern void zfcp_erp_start_timer(struct zfcp_fsf_req *);
extern void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *);
extern int zfcp_fsf_status_read(struct zfcp_adapter *);
extern int zfcp_status_read_refill(struct zfcp_adapter *adapter);
@ -103,37 +101,34 @@ extern struct fc_function_template zfcp_transport_functions;
/******************************** ERP ****************************************/
extern void zfcp_erp_modify_adapter_status(struct zfcp_adapter *, u8, void *,
u32, int);
extern int zfcp_erp_adapter_reopen(struct zfcp_adapter *, int, u8, void *);
extern int zfcp_erp_adapter_shutdown(struct zfcp_adapter *, int, u8, void *);
extern void zfcp_erp_adapter_reopen(struct zfcp_adapter *, int, u8, void *);
extern void zfcp_erp_adapter_shutdown(struct zfcp_adapter *, int, u8, void *);
extern void zfcp_erp_adapter_failed(struct zfcp_adapter *, u8, void *);
extern void zfcp_erp_modify_port_status(struct zfcp_port *, u8, void *, u32,
int);
extern int zfcp_erp_port_reopen(struct zfcp_port *, int, u8, void *);
extern int zfcp_erp_port_shutdown(struct zfcp_port *, int, u8, void *);
extern int zfcp_erp_port_forced_reopen(struct zfcp_port *, int, u8, void *);
extern void zfcp_erp_port_shutdown(struct zfcp_port *, int, u8, void *);
extern void zfcp_erp_port_forced_reopen(struct zfcp_port *, int, u8, void *);
extern void zfcp_erp_port_failed(struct zfcp_port *, u8, void *);
extern int zfcp_erp_port_reopen_all(struct zfcp_adapter *, int, u8, void *);
extern void zfcp_erp_modify_unit_status(struct zfcp_unit *, u8, void *, u32,
int);
extern int zfcp_erp_unit_reopen(struct zfcp_unit *, int, u8, void *);
extern int zfcp_erp_unit_shutdown(struct zfcp_unit *, int, u8, void *);
extern void zfcp_erp_unit_reopen(struct zfcp_unit *, int, u8, void *);
extern void zfcp_erp_unit_shutdown(struct zfcp_unit *, int, u8, void *);
extern void zfcp_erp_unit_failed(struct zfcp_unit *, u8, void *);
extern int zfcp_erp_thread_setup(struct zfcp_adapter *);
extern int zfcp_erp_thread_kill(struct zfcp_adapter *);
extern int zfcp_erp_wait(struct zfcp_adapter *);
extern void zfcp_erp_async_handler(struct zfcp_erp_action *, unsigned long);
extern void zfcp_erp_thread_kill(struct zfcp_adapter *);
extern void zfcp_erp_wait(struct zfcp_adapter *);
extern void zfcp_erp_notify(struct zfcp_erp_action *, unsigned long);
extern void zfcp_erp_port_boxed(struct zfcp_port *, u8 id, void *ref);
extern void zfcp_erp_unit_boxed(struct zfcp_unit *, u8 id, void *ref);
extern void zfcp_erp_port_access_denied(struct zfcp_port *, u8 id, void *ref);
extern void zfcp_erp_unit_access_denied(struct zfcp_unit *, u8 id, void *ref);
extern void zfcp_erp_adapter_access_changed(struct zfcp_adapter *, u8, void *);
extern void zfcp_erp_port_access_changed(struct zfcp_port *, u8, void *);
extern void zfcp_erp_unit_access_changed(struct zfcp_unit *, u8, void *);
extern void zfcp_erp_timeout_handler(unsigned long);
/******************************** AUX ****************************************/
extern void zfcp_sg_free_table(struct scatterlist *sg, int count);
extern int zfcp_sg_setup_table(struct scatterlist *sg, int count);

43
drivers/s390/scsi/zfcp_fsf.c
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@ -8,6 +8,31 @@
#include "zfcp_ext.h"
static void zfcp_fsf_request_timeout_handler(unsigned long data)
{
struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 62,
NULL);
}
static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
unsigned long timeout)
{
fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
fsf_req->timer.data = (unsigned long) fsf_req->adapter;
fsf_req->timer.expires = jiffies + timeout;
add_timer(&fsf_req->timer);
}
static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
{
BUG_ON(!fsf_req->erp_action);
fsf_req->timer.function = zfcp_erp_timeout_handler;
fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
fsf_req->timer.expires = jiffies + 30 * HZ;
add_timer(&fsf_req->timer);
}
/* association between FSF command and FSF QTCB type */
static u32 fsf_qtcb_type[] = {
[FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
@ -485,7 +510,7 @@ void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
req->handler(req);
if (req->erp_action)
zfcp_erp_async_handler(req->erp_action, 0);
zfcp_erp_notify(req->erp_action, 0);
req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
@ -1108,7 +1133,7 @@ int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
if (erp_action) {
erp_action->fsf_req = req;
req->erp_action = erp_action;
zfcp_erp_start_timer(req);
zfcp_fsf_start_erp_timer(req);
} else
zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
@ -1263,7 +1288,7 @@ int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
req->handler = zfcp_fsf_exchange_config_data_handler;
erp_action->fsf_req = req;
zfcp_erp_start_timer(req);
zfcp_fsf_start_erp_timer(req);
retval = zfcp_fsf_req_send(req);
if (retval) {
zfcp_fsf_req_free(req);
@ -1353,7 +1378,7 @@ int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
req->erp_action = erp_action;
erp_action->fsf_req = req;
zfcp_erp_start_timer(req);
zfcp_fsf_start_erp_timer(req);
retval = zfcp_fsf_req_send(req);
if (retval) {
zfcp_fsf_req_free(req);
@ -1530,7 +1555,7 @@ int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
erp_action->fsf_req = req;
atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status);
zfcp_erp_start_timer(req);
zfcp_fsf_start_erp_timer(req);
retval = zfcp_fsf_req_send(req);
if (retval) {
zfcp_fsf_req_free(req);
@ -1601,7 +1626,7 @@ int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
erp_action->fsf_req = req;
atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status);
zfcp_erp_start_timer(req);
zfcp_fsf_start_erp_timer(req);
retval = zfcp_fsf_req_send(req);
if (retval) {
zfcp_fsf_req_free(req);
@ -1699,7 +1724,7 @@ int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
&erp_action->port->status);
zfcp_erp_start_timer(req);
zfcp_fsf_start_erp_timer(req);
retval = zfcp_fsf_req_send(req);
if (retval) {
zfcp_fsf_req_free(req);
@ -1878,7 +1903,7 @@ int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status);
zfcp_erp_start_timer(req);
zfcp_fsf_start_erp_timer(req);
retval = zfcp_fsf_req_send(req);
if (retval) {
zfcp_fsf_req_free(req);
@ -1963,7 +1988,7 @@ int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
erp_action->fsf_req = req;
atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status);
zfcp_erp_start_timer(req);
zfcp_fsf_start_erp_timer(req);
retval = zfcp_fsf_req_send(req);
if (retval) {
zfcp_fsf_req_free(req);