提交 bbb9d180 编写于 作者: J James Smart 提交者: James Bottomley

[SCSI] lpfc 8.3.3 : Add support for Target Reset handler entrypoint

Patch was originally submitted upstream on 4/21/2008:
  http://marc.info/?l=linux-scsi&m=120880973719266&w=2

Somewhere, it never get merged. The patch restructures the task mgmt
routines, commonizing like behavior. Then the patch changes device
reset to LUN resets, and adds a target reset handler.
Signed-off-by: NJames Smart <james.smart@emulex.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>
上级 d11e31dd
......@@ -2675,72 +2675,6 @@ lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
return;
}
/**
* lpfc_scsi_tgt_reset - Target reset handler
* @lpfc_cmd: Pointer to lpfc_scsi_buf data structure
* @vport: The virtual port for which this call is being executed.
* @tgt_id: Target ID.
* @lun: Lun number.
* @rdata: Pointer to lpfc_rport_data.
*
* This routine issues a TARGET RESET iocb to reset a target with @tgt_id ID.
*
* Return Code:
* 0x2003 - Error
* 0x2002 - Success.
**/
static int
lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport,
unsigned tgt_id, unsigned int lun,
struct lpfc_rport_data *rdata)
{
struct lpfc_hba *phba = vport->phba;
struct lpfc_iocbq *iocbq;
struct lpfc_iocbq *iocbqrsp;
int ret;
int status;
if (!rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
return FAILED;
lpfc_cmd->rdata = rdata;
status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun,
FCP_TARGET_RESET);
if (!status)
return FAILED;
iocbq = &lpfc_cmd->cur_iocbq;
iocbqrsp = lpfc_sli_get_iocbq(phba);
if (!iocbqrsp)
return FAILED;
/* Issue Target Reset to TGT <num> */
lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
"0702 Issue Target Reset to TGT %d Data: x%x x%x\n",
tgt_id, rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag);
status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
iocbq, iocbqrsp, lpfc_cmd->timeout);
if (status != IOCB_SUCCESS) {
if (status == IOCB_TIMEDOUT) {
iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
ret = TIMEOUT_ERROR;
} else
ret = FAILED;
lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
} else {
ret = SUCCESS;
lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
(lpfc_cmd->result & IOERR_DRVR_MASK))
lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
}
lpfc_sli_release_iocbq(phba, iocbqrsp);
return ret;
}
/**
* lpfc_info - Info entry point of scsi_host_template data structure
* @host: The scsi host for which this call is being executed.
......@@ -3121,140 +3055,322 @@ lpfc_abort_handler(struct scsi_cmnd *cmnd)
return ret;
}
static char *
lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
{
switch (task_mgmt_cmd) {
case FCP_ABORT_TASK_SET:
return "ABORT_TASK_SET";
case FCP_CLEAR_TASK_SET:
return "FCP_CLEAR_TASK_SET";
case FCP_BUS_RESET:
return "FCP_BUS_RESET";
case FCP_LUN_RESET:
return "FCP_LUN_RESET";
case FCP_TARGET_RESET:
return "FCP_TARGET_RESET";
case FCP_CLEAR_ACA:
return "FCP_CLEAR_ACA";
case FCP_TERMINATE_TASK:
return "FCP_TERMINATE_TASK";
default:
return "unknown";
}
}
/**
* lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
* @cmnd: Pointer to scsi_cmnd data structure.
* lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
* @vport: The virtual port for which this call is being executed.
* @rdata: Pointer to remote port local data
* @tgt_id: Target ID of remote device.
* @lun_id: Lun number for the TMF
* @task_mgmt_cmd: type of TMF to send
*
* This routine does a device reset by sending a TARGET_RESET task management
* command.
* This routine builds and sends a TMF (SCSI Task Mgmt Function) to
* a remote port.
*
* Return code :
* Return Code:
* 0x2003 - Error
* 0x2002 - Success
* 0x2002 - Success.
**/
static int
lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata,
unsigned tgt_id, unsigned int lun_id,
uint8_t task_mgmt_cmd)
{
struct Scsi_Host *shost = cmnd->device->host;
struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
struct lpfc_hba *phba = vport->phba;
struct lpfc_scsi_buf *lpfc_cmd;
struct lpfc_iocbq *iocbq, *iocbqrsp;
struct lpfc_rport_data *rdata = cmnd->device->hostdata;
struct lpfc_nodelist *pnode = rdata->pnode;
unsigned long later;
int ret = SUCCESS;
struct lpfc_iocbq *iocbq;
struct lpfc_iocbq *iocbqrsp;
int ret;
int status;
int cnt;
struct lpfc_scsi_event_header scsi_event;
lpfc_block_error_handler(cmnd);
/*
* If target is not in a MAPPED state, delay the reset until
* target is rediscovered or devloss timeout expires.
*/
later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
while (time_after(later, jiffies)) {
if (!pnode || !NLP_CHK_NODE_ACT(pnode))
if (!rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
return FAILED;
if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
break;
schedule_timeout_uninterruptible(msecs_to_jiffies(500));
rdata = cmnd->device->hostdata;
if (!rdata)
break;
pnode = rdata->pnode;
}
scsi_event.event_type = FC_REG_SCSI_EVENT;
scsi_event.subcategory = LPFC_EVENT_TGTRESET;
scsi_event.lun = 0;
memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
fc_host_post_vendor_event(shost,
fc_get_event_number(),
sizeof(scsi_event),
(char *)&scsi_event,
LPFC_NL_VENDOR_ID);
if (!rdata || pnode->nlp_state != NLP_STE_MAPPED_NODE) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0721 LUN Reset rport "
"failure: msec x%x rdata x%p\n",
jiffies_to_msecs(jiffies - later), rdata);
return FAILED;
}
lpfc_cmd = lpfc_get_scsi_buf(phba);
if (lpfc_cmd == NULL)
return FAILED;
lpfc_cmd->timeout = 60;
lpfc_cmd->rdata = rdata;
status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd,
cmnd->device->lun,
FCP_TARGET_RESET);
status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
task_mgmt_cmd);
if (!status) {
lpfc_release_scsi_buf(phba, lpfc_cmd);
return FAILED;
}
iocbq = &lpfc_cmd->cur_iocbq;
/* get a buffer for this IOCB command response */
iocbq = &lpfc_cmd->cur_iocbq;
iocbqrsp = lpfc_sli_get_iocbq(phba);
if (iocbqrsp == NULL) {
lpfc_release_scsi_buf(phba, lpfc_cmd);
return FAILED;
}
lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
"0703 Issue target reset to TGT %d LUN %d "
"rpi x%x nlp_flag x%x\n", cmnd->device->id,
cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
"0702 Issue %s to TGT %d LUN %d "
"rpi x%x nlp_flag x%x\n",
lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag);
status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
iocbq, iocbqrsp, lpfc_cmd->timeout);
if (status != IOCB_SUCCESS) {
if (status == IOCB_TIMEDOUT) {
iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
ret = TIMEOUT_ERROR;
} else {
if (status != IOCB_SUCCESS)
} else
ret = FAILED;
lpfc_release_scsi_buf(phba, lpfc_cmd);
}
lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0713 SCSI layer issued device reset (%d, %d) "
"return x%x status x%x result x%x\n",
cmnd->device->id, cmnd->device->lun, ret,
iocbqrsp->iocb.ulpStatus,
"0727 TMF %s to TGT %d LUN %d failed (%d, %d)\n",
lpfc_taskmgmt_name(task_mgmt_cmd),
tgt_id, lun_id, iocbqrsp->iocb.ulpStatus,
iocbqrsp->iocb.un.ulpWord[4]);
} else
ret = SUCCESS;
lpfc_sli_release_iocbq(phba, iocbqrsp);
cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, cmnd->device->lun,
LPFC_CTX_TGT);
if (ret != TIMEOUT_ERROR)
lpfc_release_scsi_buf(phba, lpfc_cmd);
return ret;
}
/**
* lpfc_chk_tgt_mapped -
* @vport: The virtual port to check on
* @cmnd: Pointer to scsi_cmnd data structure.
*
* This routine delays until the scsi target (aka rport) for the
* command exists (is present and logged in) or we declare it non-existent.
*
* Return code :
* 0x2003 - Error
* 0x2002 - Success
**/
static int
lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
{
struct lpfc_rport_data *rdata = cmnd->device->hostdata;
struct lpfc_nodelist *pnode = rdata->pnode;
unsigned long later;
/*
* If target is not in a MAPPED state, delay until
* target is rediscovered or devloss timeout expires.
*/
later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
while (time_after(later, jiffies)) {
if (!pnode || !NLP_CHK_NODE_ACT(pnode))
return FAILED;
if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
return SUCCESS;
schedule_timeout_uninterruptible(msecs_to_jiffies(500));
rdata = cmnd->device->hostdata;
if (!rdata)
return FAILED;
pnode = rdata->pnode;
}
if (!pnode || !NLP_CHK_NODE_ACT(pnode) ||
(pnode->nlp_state != NLP_STE_MAPPED_NODE))
return FAILED;
return SUCCESS;
}
/**
* lpfc_reset_flush_io_context -
* @vport: The virtual port (scsi_host) for the flush context
* @tgt_id: If aborting by Target contect - specifies the target id
* @lun_id: If aborting by Lun context - specifies the lun id
* @context: specifies the context level to flush at.
*
* After a reset condition via TMF, we need to flush orphaned i/o
* contexts from the adapter. This routine aborts any contexts
* outstanding, then waits for their completions. The wait is
* bounded by devloss_tmo though.
*
* Return code :
* 0x2003 - Error
* 0x2002 - Success
**/
static int
lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
uint64_t lun_id, lpfc_ctx_cmd context)
{
struct lpfc_hba *phba = vport->phba;
unsigned long later;
int cnt;
cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
if (cnt)
lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
cmnd->device->id, cmnd->device->lun,
LPFC_CTX_TGT);
tgt_id, lun_id, context);
later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
while (time_after(later, jiffies) && cnt) {
schedule_timeout_uninterruptible(msecs_to_jiffies(20));
cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id,
cmnd->device->lun, LPFC_CTX_TGT);
cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
}
if (cnt) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0719 device reset I/O flush failure: "
"cnt x%x\n", cnt);
ret = FAILED;
"0724 I/O flush failure for context %s : cnt x%x\n",
((context == LPFC_CTX_LUN) ? "LUN" :
((context == LPFC_CTX_TGT) ? "TGT" :
((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
cnt);
return FAILED;
}
return ret;
return SUCCESS;
}
/**
* lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
* @cmnd: Pointer to scsi_cmnd data structure.
*
* This routine does a device reset by sending a LUN_RESET task management
* command.
*
* Return code :
* 0x2003 - Error
* 0x2002 - Success
**/
static int
lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
{
struct Scsi_Host *shost = cmnd->device->host;
struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
struct lpfc_rport_data *rdata = cmnd->device->hostdata;
struct lpfc_nodelist *pnode = rdata->pnode;
unsigned tgt_id = cmnd->device->id;
unsigned int lun_id = cmnd->device->lun;
struct lpfc_scsi_event_header scsi_event;
int status;
lpfc_block_error_handler(cmnd);
status = lpfc_chk_tgt_mapped(vport, cmnd);
if (status == FAILED) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0721 Device Reset rport failure: rdata x%p\n", rdata);
return FAILED;
}
scsi_event.event_type = FC_REG_SCSI_EVENT;
scsi_event.subcategory = LPFC_EVENT_LUNRESET;
scsi_event.lun = lun_id;
memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
fc_host_post_vendor_event(shost, fc_get_event_number(),
sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
FCP_LUN_RESET);
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0713 SCSI layer issued Device Reset (%d, %d) "
"return x%x\n", tgt_id, lun_id, status);
/*
* We have to clean up i/o as : they may be orphaned by the TMF;
* or if the TMF failed, they may be in an indeterminate state.
* So, continue on.
* We will report success if all the i/o aborts successfully.
*/
status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
LPFC_CTX_LUN);
return status;
}
/**
* lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
* @cmnd: Pointer to scsi_cmnd data structure.
*
* This routine does a target reset by sending a TARGET_RESET task management
* command.
*
* Return code :
* 0x2003 - Error
* 0x2002 - Success
**/
static int
lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
{
struct Scsi_Host *shost = cmnd->device->host;
struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
struct lpfc_rport_data *rdata = cmnd->device->hostdata;
struct lpfc_nodelist *pnode = rdata->pnode;
unsigned tgt_id = cmnd->device->id;
unsigned int lun_id = cmnd->device->lun;
struct lpfc_scsi_event_header scsi_event;
int status;
lpfc_block_error_handler(cmnd);
status = lpfc_chk_tgt_mapped(vport, cmnd);
if (status == FAILED) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0722 Target Reset rport failure: rdata x%p\n", rdata);
return FAILED;
}
scsi_event.event_type = FC_REG_SCSI_EVENT;
scsi_event.subcategory = LPFC_EVENT_TGTRESET;
scsi_event.lun = 0;
memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
fc_host_post_vendor_event(shost, fc_get_event_number(),
sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
FCP_TARGET_RESET);
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0723 SCSI layer issued Target Reset (%d, %d) "
"return x%x\n", tgt_id, lun_id, status);
/*
* We have to clean up i/o as : they may be orphaned by the TMF;
* or if the TMF failed, they may be in an indeterminate state.
* So, continue on.
* We will report success if all the i/o aborts successfully.
*/
status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
LPFC_CTX_TGT);
return status;
}
/**
* lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
* @cmnd: Pointer to scsi_cmnd data structure.
*
* This routine does target reset to all target on @cmnd->device->host.
* This routine does target reset to all targets on @cmnd->device->host.
* This emulates Parallel SCSI Bus Reset Semantics.
*
* Return Code:
* Return code :
* 0x2003 - Error
* 0x2002 - Success
**/
......@@ -3263,14 +3379,10 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
{
struct Scsi_Host *shost = cmnd->device->host;
struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
struct lpfc_hba *phba = vport->phba;
struct lpfc_nodelist *ndlp = NULL;
int match;
int ret = SUCCESS, status = SUCCESS, i;
int cnt;
struct lpfc_scsi_buf * lpfc_cmd;
unsigned long later;
struct lpfc_scsi_event_header scsi_event;
int match;
int ret = SUCCESS, status, i;
scsi_event.event_type = FC_REG_SCSI_EVENT;
scsi_event.subcategory = LPFC_EVENT_BUSRESET;
......@@ -3278,13 +3390,11 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
fc_host_post_vendor_event(shost,
fc_get_event_number(),
sizeof(scsi_event),
(char *)&scsi_event,
LPFC_NL_VENDOR_ID);
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);
/*
* Since the driver manages a single bus device, reset all
* targets known to the driver. Should any target reset
......@@ -3307,16 +3417,11 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
spin_unlock_irq(shost->host_lock);
if (!match)
continue;
lpfc_cmd = lpfc_get_scsi_buf(phba);
if (lpfc_cmd) {
lpfc_cmd->timeout = 60;
status = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i,
cmnd->device->lun,
ndlp->rport->dd_data);
if (status != TIMEOUT_ERROR)
lpfc_release_scsi_buf(phba, lpfc_cmd);
}
if (!lpfc_cmd || status != SUCCESS) {
status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data,
i, 0, FCP_TARGET_RESET);
if (status != SUCCESS) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0700 Bus Reset on target %d failed\n",
i);
......@@ -3324,25 +3429,16 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
}
}
/*
* All outstanding txcmplq I/Os should have been aborted by
* the targets. Unfortunately, some targets do not abide by
* this forcing the driver to double check.
* We have to clean up i/o as : they may be orphaned by the TMFs
* above; or if any of the TMFs failed, they may be in an
* indeterminate state.
* We will report success if all the i/o aborts successfully.
*/
cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
if (cnt)
lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
0, 0, LPFC_CTX_HOST);
later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
while (time_after(later, jiffies) && cnt) {
schedule_timeout_uninterruptible(msecs_to_jiffies(20));
cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
}
if (cnt) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0715 Bus Reset I/O flush failure: "
"cnt x%x left x%x\n", cnt, i);
status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
if (status != SUCCESS)
ret = FAILED;
}
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
return ret;
......@@ -3475,7 +3571,8 @@ struct scsi_host_template lpfc_template = {
.info = lpfc_info,
.queuecommand = lpfc_queuecommand,
.eh_abort_handler = lpfc_abort_handler,
.eh_device_reset_handler= lpfc_device_reset_handler,
.eh_device_reset_handler = lpfc_device_reset_handler,
.eh_target_reset_handler = lpfc_target_reset_handler,
.eh_bus_reset_handler = lpfc_bus_reset_handler,
.slave_alloc = lpfc_slave_alloc,
.slave_configure = lpfc_slave_configure,
......@@ -3495,7 +3592,8 @@ struct scsi_host_template lpfc_vport_template = {
.info = lpfc_info,
.queuecommand = lpfc_queuecommand,
.eh_abort_handler = lpfc_abort_handler,
.eh_device_reset_handler= lpfc_device_reset_handler,
.eh_device_reset_handler = lpfc_device_reset_handler,
.eh_target_reset_handler = lpfc_target_reset_handler,
.eh_bus_reset_handler = lpfc_bus_reset_handler,
.slave_alloc = lpfc_slave_alloc,
.slave_configure = lpfc_slave_configure,
......
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