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lpfc: Fixed locking for scsi task management commands 

Fixed locking for scsi task management commands.

Signed-off-by: James Smart <james.smart@emulex.com>
Reviewed-By: Dick Kennedy <dick.kennedy@emulex.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
James Smart 2014-04-04 13:52:31 -04:00 committed by Christoph Hellwig
parent f38fa0bb7c
commit 98912dda4d
3 changed files with 141 additions and 5 deletions
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3
drivers/scsi/lpfc/lpfc_crtn.h
View File

@ -311,6 +311,9 @@ int lpfc_sli_issue_abort_iotag(struct lpfc_hba *, struct lpfc_sli_ring *,
int lpfc_sli_sum_iocb(struct lpfc_vport *, uint16_t, uint64_t, lpfc_ctx_cmd);
int lpfc_sli_abort_iocb(struct lpfc_vport *, struct lpfc_sli_ring *, uint16_t,
uint64_t, lpfc_ctx_cmd);
int
lpfc_sli_abort_taskmgmt(struct lpfc_vport *, struct lpfc_sli_ring *,
uint16_t, uint64_t, lpfc_ctx_cmd);
void lpfc_mbox_timeout(unsigned long);
void lpfc_mbox_timeout_handler(struct lpfc_hba *);

25
drivers/scsi/lpfc/lpfc_scsi.c
View File

@ -4783,7 +4783,9 @@ lpfc_abort_handler(struct scsi_cmnd *cmnd)
struct lpfc_scsi_buf *lpfc_cmd;
IOCB_t *cmd, *icmd;
int ret = SUCCESS, status = 0;
unsigned long flags;
struct lpfc_sli_ring *pring_s4;
int ring_number, ret_val;
unsigned long flags, iflags;
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
status = fc_block_scsi_eh(cmnd);
@ -4880,11 +4882,23 @@ lpfc_abort_handler(struct scsi_cmnd *cmnd)
abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
abtsiocb->vport = vport;
if (phba->sli_rev == LPFC_SLI_REV4) {
ring_number = MAX_SLI3_CONFIGURED_RINGS + iocb->fcp_wqidx;
pring_s4 = &phba->sli.ring[ring_number];
/* Note: both hbalock and ring_lock must be set here */
spin_lock_irqsave(&pring_s4->ring_lock, iflags);
ret_val = __lpfc_sli_issue_iocb(phba, pring_s4->ringno,
abtsiocb, 0);
spin_unlock_irqrestore(&pring_s4->ring_lock, iflags);
} else {
ret_val = __lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
abtsiocb, 0);
}
/* no longer need the lock after this point */
spin_unlock_irqrestore(&phba->hbalock, flags);
if (lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, abtsiocb, 0) ==
IOCB_ERROR) {
if (ret_val == IOCB_ERROR) {
lpfc_sli_release_iocbq(phba, abtsiocb);
ret = FAILED;
goto out;
@ -5185,8 +5199,9 @@ lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
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],
tgt_id, lun_id, context);
lpfc_sli_abort_taskmgmt(vport,
&phba->sli.ring[phba->sli.fcp_ring],
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));

118
drivers/scsi/lpfc/lpfc_sli.c
View File

@ -10117,6 +10117,124 @@ lpfc_sli_abort_iocb(struct lpfc_vport *vport, struct lpfc_sli_ring *pring,
return errcnt;
}
/**
* lpfc_sli_abort_taskmgmt - issue abort for all commands on a host/target/LUN
* @vport: Pointer to virtual port.
* @pring: Pointer to driver SLI ring object.
* @tgt_id: SCSI ID of the target.
* @lun_id: LUN ID of the scsi device.
* @taskmgmt_cmd: LPFC_CTX_LUN/LPFC_CTX_TGT/LPFC_CTX_HOST.
*
* This function sends an abort command for every SCSI command
* associated with the given virtual port pending on the ring
* filtered by lpfc_sli_validate_fcp_iocb function.
* When taskmgmt_cmd == LPFC_CTX_LUN, the function sends abort only to the
* FCP iocbs associated with lun specified by tgt_id and lun_id
* parameters
* When taskmgmt_cmd == LPFC_CTX_TGT, the function sends abort only to the
* FCP iocbs associated with SCSI target specified by tgt_id parameter.
* When taskmgmt_cmd == LPFC_CTX_HOST, the function sends abort to all
* FCP iocbs associated with virtual port.
* This function returns number of iocbs it aborted .
* This function is called with no locks held right after a taskmgmt
* command is sent.
**/
int
lpfc_sli_abort_taskmgmt(struct lpfc_vport *vport, struct lpfc_sli_ring *pring,
uint16_t tgt_id, uint64_t lun_id, lpfc_ctx_cmd cmd)
{
struct lpfc_hba *phba = vport->phba;
struct lpfc_iocbq *abtsiocbq;
struct lpfc_iocbq *iocbq;
IOCB_t *icmd;
int sum, i, ret_val;
unsigned long iflags;
struct lpfc_sli_ring *pring_s4;
uint32_t ring_number;
spin_lock_irq(&phba->hbalock);
/* all I/Os are in process of being flushed */
if (phba->hba_flag & HBA_FCP_IOQ_FLUSH) {
spin_unlock_irq(&phba->hbalock);
return 0;
}
sum = 0;
for (i = 1; i <= phba->sli.last_iotag; i++) {
iocbq = phba->sli.iocbq_lookup[i];
if (lpfc_sli_validate_fcp_iocb(iocbq, vport, tgt_id, lun_id,
cmd) != 0)
continue;
/*
* If the iocbq is already being aborted, don't take a second
* action, but do count it.
*/
if (iocbq->iocb_flag & LPFC_DRIVER_ABORTED)
continue;
/* issue ABTS for this IOCB based on iotag */
abtsiocbq = __lpfc_sli_get_iocbq(phba);
if (abtsiocbq == NULL)
continue;
icmd = &iocbq->iocb;
abtsiocbq->iocb.un.acxri.abortType = ABORT_TYPE_ABTS;
abtsiocbq->iocb.un.acxri.abortContextTag = icmd->ulpContext;
if (phba->sli_rev == LPFC_SLI_REV4)
abtsiocbq->iocb.un.acxri.abortIoTag =
iocbq->sli4_xritag;
else
abtsiocbq->iocb.un.acxri.abortIoTag = icmd->ulpIoTag;
abtsiocbq->iocb.ulpLe = 1;
abtsiocbq->iocb.ulpClass = icmd->ulpClass;
abtsiocbq->vport = vport;
/* ABTS WQE must go to the same WQ as the WQE to be aborted */
abtsiocbq->fcp_wqidx = iocbq->fcp_wqidx;
if (iocbq->iocb_flag & LPFC_IO_FCP)
abtsiocbq->iocb_flag |= LPFC_USE_FCPWQIDX;
if (lpfc_is_link_up(phba))
abtsiocbq->iocb.ulpCommand = CMD_ABORT_XRI_CN;
else
abtsiocbq->iocb.ulpCommand = CMD_CLOSE_XRI_CN;
/* Setup callback routine and issue the command. */
abtsiocbq->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
/*
* Indicate the IO is being aborted by the driver and set
* the caller's flag into the aborted IO.
*/
iocbq->iocb_flag |= LPFC_DRIVER_ABORTED;
if (phba->sli_rev == LPFC_SLI_REV4) {
ring_number = MAX_SLI3_CONFIGURED_RINGS +
iocbq->fcp_wqidx;
pring_s4 = &phba->sli.ring[ring_number];
/* Note: both hbalock and ring_lock must be set here */
spin_lock_irqsave(&pring_s4->ring_lock, iflags);
ret_val = __lpfc_sli_issue_iocb(phba, pring_s4->ringno,
abtsiocbq, 0);
spin_unlock_irqrestore(&pring_s4->ring_lock, iflags);
} else {
ret_val = __lpfc_sli_issue_iocb(phba, pring->ringno,
abtsiocbq, 0);
}
if (ret_val == IOCB_ERROR)
__lpfc_sli_release_iocbq(phba, abtsiocbq);
else
sum++;
}
spin_unlock_irq(&phba->hbalock);
return sum;
}
/**
* lpfc_sli_wake_iocb_wait - lpfc_sli_issue_iocb_wait's completion handler
* @phba: Pointer to HBA context object.