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[SCSI] scsi_transport_fc: Introduce helper function for blocking scsi_eh

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Move the duplicated code from FC LLDs to SCSI FC transport class.

Acked-by: James Smart <james.smart@emulex.com>
Acked-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Acked-by: Abhijeet Joglekar <abjoglek@cisco.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Christof Schmitt 2009-10-30 17:59:29 +01:00 committed by James Bottomley
parent 03b147083a
commit 65d430fa99
5 changed files with 37 additions and 65 deletions
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20
drivers/scsi/fnic/fnic_scsi.c
View file

@ -1225,22 +1225,6 @@ void fnic_terminate_rport_io(struct fc_rport *rport)
}
static void fnic_block_error_handler(struct scsi_cmnd *sc)
{
struct Scsi_Host *shost = sc->device->host;
struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
unsigned long flags;
spin_lock_irqsave(shost->host_lock, flags);
while (rport->port_state == FC_PORTSTATE_BLOCKED) {
spin_unlock_irqrestore(shost->host_lock, flags);
msleep(1000);
spin_lock_irqsave(shost->host_lock, flags);
}
spin_unlock_irqrestore(shost->host_lock, flags);
}
/*
* This function is exported to SCSI for sending abort cmnds.
* A SCSI IO is represented by a io_req in the driver.
@ -1260,7 +1244,7 @@ int fnic_abort_cmd(struct scsi_cmnd *sc)
DECLARE_COMPLETION_ONSTACK(tm_done);
/* Wait for rport to unblock */
fnic_block_error_handler(sc);
fc_block_scsi_eh(sc);
/* Get local-port, check ready and link up */
lp = shost_priv(sc->device->host);
@ -1542,7 +1526,7 @@ int fnic_device_reset(struct scsi_cmnd *sc)
DECLARE_COMPLETION_ONSTACK(tm_done);
/* Wait for rport to unblock */
fnic_block_error_handler(sc);
fc_block_scsi_eh(sc);
/* Get local-port, check ready and link up */
lp = shost_priv(sc->device->host);

30
drivers/scsi/lpfc/lpfc_scsi.c
View file

@ -2916,28 +2916,6 @@ lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
return 0;
}
/**
* lpfc_block_error_handler - Routine to block error handler
* @cmnd: Pointer to scsi_cmnd data structure.
*
* This routine blocks execution till fc_rport state is not FC_PORSTAT_BLCOEKD.
**/
static void
lpfc_block_error_handler(struct scsi_cmnd *cmnd)
{
struct Scsi_Host *shost = cmnd->device->host;
struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
spin_lock_irq(shost->host_lock);
while (rport->port_state == FC_PORTSTATE_BLOCKED) {
spin_unlock_irq(shost->host_lock);
msleep(1000);
spin_lock_irq(shost->host_lock);
}
spin_unlock_irq(shost->host_lock);
return;
}
/**
* lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
* @cmnd: Pointer to scsi_cmnd data structure.
@ -2961,7 +2939,7 @@ lpfc_abort_handler(struct scsi_cmnd *cmnd)
int ret = SUCCESS;
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
lpfc_block_error_handler(cmnd);
fc_block_scsi_eh(cmnd);
lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
BUG_ON(!lpfc_cmd);
@ -3259,7 +3237,7 @@ lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
struct lpfc_scsi_event_header scsi_event;
int status;
lpfc_block_error_handler(cmnd);
fc_block_scsi_eh(cmnd);
status = lpfc_chk_tgt_mapped(vport, cmnd);
if (status == FAILED) {
@ -3318,7 +3296,7 @@ lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
struct lpfc_scsi_event_header scsi_event;
int status;
lpfc_block_error_handler(cmnd);
fc_block_scsi_eh(cmnd);
status = lpfc_chk_tgt_mapped(vport, cmnd);
if (status == FAILED) {
@ -3384,7 +3362,7 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
fc_host_post_vendor_event(shost, fc_get_event_number(),
sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
lpfc_block_error_handler(cmnd);
fc_block_scsi_eh(cmnd);
/*
* Since the driver manages a single bus device, reset all

25
drivers/scsi/qla2xxx/qla_os.c
View file

@ -728,23 +728,6 @@ qla2x00_abort_fcport_cmds(fc_port_t *fcport)
spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
static void
qla2x00_block_error_handler(struct scsi_cmnd *cmnd)
{
struct Scsi_Host *shost = cmnd->device->host;
struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
unsigned long flags;
spin_lock_irqsave(shost->host_lock, flags);
while (rport->port_state == FC_PORTSTATE_BLOCKED) {
spin_unlock_irqrestore(shost->host_lock, flags);
msleep(1000);
spin_lock_irqsave(shost->host_lock, flags);
}
spin_unlock_irqrestore(shost->host_lock, flags);
return;
}
/**************************************************************************
* qla2xxx_eh_abort
*
@ -774,7 +757,7 @@ qla2xxx_eh_abort(struct scsi_cmnd *cmd)
struct req_que *req = vha->req;
srb_t *spt;
qla2x00_block_error_handler(cmd);
fc_block_scsi_eh(cmd);
if (!CMD_SP(cmd))
return SUCCESS;
@ -905,7 +888,7 @@ __qla2xxx_eh_generic_reset(char *name, enum nexus_wait_type type,
fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
int err;
qla2x00_block_error_handler(cmd);
fc_block_scsi_eh(cmd);
if (!fcport)
return FAILED;
@ -985,7 +968,7 @@ qla2xxx_eh_bus_reset(struct scsi_cmnd *cmd)
unsigned long serial;
srb_t *sp = (srb_t *) CMD_SP(cmd);
qla2x00_block_error_handler(cmd);
fc_block_scsi_eh(cmd);
id = cmd->device->id;
lun = cmd->device->lun;
@ -1048,7 +1031,7 @@ qla2xxx_eh_host_reset(struct scsi_cmnd *cmd)
srb_t *sp = (srb_t *) CMD_SP(cmd);
scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
qla2x00_block_error_handler(cmd);
fc_block_scsi_eh(cmd);
id = cmd->device->id;
lun = cmd->device->lun;

26
drivers/scsi/scsi_transport_fc.c
View file

@ -27,6 +27,7 @@
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport.h>
@ -3144,6 +3145,31 @@ fc_scsi_scan_rport(struct work_struct *work)
spin_unlock_irqrestore(shost->host_lock, flags);
}
/**
* fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
* @cmnd: SCSI command that scsi_eh is trying to recover
*
* This routine can be called from a FC LLD scsi_eh callback. It
* blocks the scsi_eh thread until the fc_rport leaves the
* FC_PORTSTATE_BLOCKED. This is necessary to avoid the scsi_eh
* failing recovery actions for blocked rports which would lead to
* offlined SCSI devices.
*/
void fc_block_scsi_eh(struct scsi_cmnd *cmnd)
{
struct Scsi_Host *shost = cmnd->device->host;
struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
unsigned long flags;
spin_lock_irqsave(shost->host_lock, flags);
while (rport->port_state == FC_PORTSTATE_BLOCKED) {
spin_unlock_irqrestore(shost->host_lock, flags);
msleep(1000);
spin_lock_irqsave(shost->host_lock, flags);
}
spin_unlock_irqrestore(shost->host_lock, flags);
}
EXPORT_SYMBOL(fc_block_scsi_eh);
/**
* fc_vport_setup - allocates and creates a FC virtual port.

1
include/scsi/scsi_transport_fc.h
View file

@ -807,5 +807,6 @@ void fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
struct fc_vport *fc_vport_create(struct Scsi_Host *shost, int channel,
struct fc_vport_identifiers *);
int fc_vport_terminate(struct fc_vport *vport);
void fc_block_scsi_eh(struct scsi_cmnd *cmnd);
#endif /* SCSI_TRANSPORT_FC_H */