Commit f7a919b4 authored by James Smart's avatar James Smart Committed by James Bottomley
Browse files

[SCSI] lpfc 8.3.26: Fix SYSFS interface issues 



Fix SYSFS interface issues.

- In the lpfc_sli4_pdev_status_reg_wait() routine, after initial 100ms delay
  following write to PHYSDEV_CONTROL register for the firmware reaction, check
  the RN bit and ERR bit of the SLIPORT_STATUS register. If none of them
  became 1, the previous PHYSDEV_CONTROL register should be considered failed
  due to lack of privilege and error for no permission should be returned
  immediately without getting into the wait for RDY bits on the SLIPORT_STATUS
  register.
- Remove the driver check on dev->is_physfn before proceed to perform the
  PHYSDEV_CONTROL register write, and let the PCI function's privilege
  setting and driver handling of PHYSDEV_CONTROL register write failure to
  handle the reset-ability through the SLI port.
- Added key to ctlreg_write to prevent unauthorized or unexpected write to
  the control register.
- Change return to EACCES for sysfs access that are failed because hba_reset
  is disabled.

Signed-off-by: default avatarAlex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: default avatarJames Smart <james.smart@emulex.com>
Signed-off-by: default avatarJames Bottomley <JBottomley@Parallels.com>
parent 079b5c91

drivers/scsi/lpfc/lpfc_attr.c

+28 −14
Original line number Diff line number Diff line
@@ -52,6 +52,13 @@ 
#define LPFC_MIN_DEVLOSS_TMO 1

#define LPFC_MAX_DEVLOSS_TMO 255



/*

 * Write key size should be multiple of 4. If write key is changed

 * make sure that library write key is also changed.

 */

#define LPFC_REG_WRITE_KEY_SIZE	4

#define LPFC_REG_WRITE_KEY	"EMLX"



/**

 * lpfc_jedec_to_ascii - Hex to ascii convertor according to JEDEC rules

 * @incr: integer to convert.
@@ -693,7 +700,7 @@ lpfc_selective_reset(struct lpfc_hba *phba) 
	int rc;



	if (!phba->cfg_enable_hba_reset)

		return -EIO;

		return -EACCES;



	status = lpfc_do_offline(phba, LPFC_EVT_OFFLINE);
@@ -768,13 +775,18 @@ lpfc_issue_reset(struct device *dev, struct device_attribute *attr, 
static int

lpfc_sli4_pdev_status_reg_wait(struct lpfc_hba *phba)

{

	struct lpfc_register portstat_reg;

	struct lpfc_register portstat_reg = {0};

	int i;





	msleep(100);

	lpfc_readl(phba->sli4_hba.u.if_type2.STATUSregaddr,

		   &portstat_reg.word0);



	/* verify if privilaged for the request operation */

	if (!bf_get(lpfc_sliport_status_rn, &portstat_reg) &&

	    !bf_get(lpfc_sliport_status_err, &portstat_reg))

		return -EPERM;



	/* wait for the SLI port firmware ready after firmware reset */

	for (i = 0; i < LPFC_FW_RESET_MAXIMUM_WAIT_10MS_CNT; i++) {

		msleep(10);
@@ -816,16 +828,13 @@ lpfc_sli4_pdev_reg_request(struct lpfc_hba *phba, uint32_t opcode) 
	int rc;



	if (!phba->cfg_enable_hba_reset)

		return -EIO;

		return -EACCES;



	if ((phba->sli_rev < LPFC_SLI_REV4) ||

	    (bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) !=

	     LPFC_SLI_INTF_IF_TYPE_2))

		return -EPERM;



	if (!pdev->is_physfn)

		return -EPERM;



	/* Disable SR-IOV virtual functions if enabled */

	if (phba->cfg_sriov_nr_virtfn) {

		pci_disable_sriov(pdev);
@@ -858,7 +867,7 @@ lpfc_sli4_pdev_reg_request(struct lpfc_hba *phba, uint32_t opcode) 
	rc = lpfc_sli4_pdev_status_reg_wait(phba);



	if (rc)

		return -EIO;

		return rc;



	init_completion(&online_compl);

	rc = lpfc_workq_post_event(phba, &status, &online_compl,
@@ -984,7 +993,7 @@ lpfc_board_mode_store(struct device *dev, struct device_attribute *attr, 
	if (!status)

		return strlen(buf);

	else

		return -EIO;

		return status;

}



/**
@@ -3885,18 +3894,23 @@ sysfs_ctlreg_write(struct file *filp, struct kobject *kobj, 
	if ((off + count) > FF_REG_AREA_SIZE)

		return -ERANGE;



	if (count == 0) return 0;

	if (count <= LPFC_REG_WRITE_KEY_SIZE)

		return 0;



	if (off % 4 || count % 4 || (unsigned long)buf % 4)

		return -EINVAL;



	if (!(vport->fc_flag & FC_OFFLINE_MODE)) {

	/* This is to protect HBA registers from accidental writes. */

	if (memcmp(buf, LPFC_REG_WRITE_KEY, LPFC_REG_WRITE_KEY_SIZE))

		return -EINVAL;



	if (!(vport->fc_flag & FC_OFFLINE_MODE))

		return -EPERM;

	}



	spin_lock_irq(&phba->hbalock);

	for (buf_off = 0; buf_off < count; buf_off += sizeof(uint32_t))

		writel(*((uint32_t *)(buf + buf_off)),

	for (buf_off = 0; buf_off < count - LPFC_REG_WRITE_KEY_SIZE;

			buf_off += sizeof(uint32_t))

		writel(*((uint32_t *)(buf + buf_off + LPFC_REG_WRITE_KEY_SIZE)),

		       phba->ctrl_regs_memmap_p + off + buf_off);



	spin_unlock_irq(&phba->hbalock);

drivers/scsi/lpfc/lpfc_init.c

+0 −3
Original line number Diff line number Diff line
@@ -4056,9 +4056,6 @@ lpfc_sli_sriov_nr_virtfn_get(struct lpfc_hba *phba) 
	uint16_t nr_virtfn;

	int pos;



	if (!pdev->is_physfn)

		return 0;



	pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);

	if (pos == 0)

		return 0;

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