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linux/drivers/scsi/lpfc/lpfc_vport.c
Justin Tee 0a3c84f716 scsi: lpfc: Ensure DA_ID handling completion before deleting an NPIV instance 
Deleting an NPIV instance requires all fabric ndlps to be released before
an NPIV's resources can be torn down.  Failure to release fabric ndlps
beforehand opens kref imbalance race conditions.  Fix by forcing the DA_ID
to complete synchronously with usage of wait_queue.

Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Link: https://lore.kernel.org/r/20240912232447.45607-6-justintee8345@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2024-09-12 21:21:19 -04:00

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/*******************************************************************
* This file is part of the Emulex Linux Device Driver for *
* Fibre Channel Host Bus Adapters. *
* Copyright (C) 2017-2024 Broadcom. All Rights Reserved. The term *
* “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. *
* Copyright (C) 2004-2016 Emulex. All rights reserved. *
* EMULEX and SLI are trademarks of Emulex. *
* www.broadcom.com *
* Portions Copyright (C) 2004-2005 Christoph Hellwig *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of version 2 of the GNU General *
* Public License as published by the Free Software Foundation. *
* This program is distributed in the hope that it will be useful. *
* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
* DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
* TO BE LEGALLY INVALID. See the GNU General Public License for *
* more details, a copy of which can be found in the file COPYING *
* included with this package. *
*******************************************************************/
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/idr.h>
#include <linux/interrupt.h>
#include <linux/kthread.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/sched/signal.h>
#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport_fc.h>
#include "lpfc_hw4.h"
#include "lpfc_hw.h"
#include "lpfc_sli.h"
#include "lpfc_sli4.h"
#include "lpfc_nl.h"
#include "lpfc_disc.h"
#include "lpfc_scsi.h"
#include "lpfc.h"
#include "lpfc_logmsg.h"
#include "lpfc_crtn.h"
#include "lpfc_version.h"
#include "lpfc_vport.h"
inline void lpfc_vport_set_state(struct lpfc_vport *vport,
enum fc_vport_state new_state)
{
struct fc_vport *fc_vport = vport->fc_vport;
if (fc_vport) {
/*
* When the transport defines fc_vport_set state we will replace
* this code with the following line
*/
/* fc_vport_set_state(fc_vport, new_state); */
if (new_state != FC_VPORT_INITIALIZING)
fc_vport->vport_last_state = fc_vport->vport_state;
fc_vport->vport_state = new_state;
}
/* for all the error states we will set the invternal state to FAILED */
switch (new_state) {
case FC_VPORT_NO_FABRIC_SUPP:
case FC_VPORT_NO_FABRIC_RSCS:
case FC_VPORT_FABRIC_LOGOUT:
case FC_VPORT_FABRIC_REJ_WWN:
case FC_VPORT_FAILED:
vport->port_state = LPFC_VPORT_FAILED;
break;
case FC_VPORT_LINKDOWN:
vport->port_state = LPFC_VPORT_UNKNOWN;
break;
default:
/* do nothing */
break;
}
}
int
lpfc_alloc_vpi(struct lpfc_hba *phba)
{
unsigned long vpi;
spin_lock_irq(&phba->hbalock);
/* Start at bit 1 because vpi zero is reserved for the physical port */
vpi = find_next_zero_bit(phba->vpi_bmask, (phba->max_vpi + 1), 1);
if (vpi > phba->max_vpi)
vpi = 0;
else
set_bit(vpi, phba->vpi_bmask);
if (phba->sli_rev == LPFC_SLI_REV4)
phba->sli4_hba.max_cfg_param.vpi_used++;
spin_unlock_irq(&phba->hbalock);
return vpi;
}
static void
lpfc_free_vpi(struct lpfc_hba *phba, int vpi)
{
if (vpi == 0)
return;
spin_lock_irq(&phba->hbalock);
clear_bit(vpi, phba->vpi_bmask);
if (phba->sli_rev == LPFC_SLI_REV4)
phba->sli4_hba.max_cfg_param.vpi_used--;
spin_unlock_irq(&phba->hbalock);
}
static int
lpfc_vport_sparm(struct lpfc_hba *phba, struct lpfc_vport *vport)
{
LPFC_MBOXQ_t *pmb;
MAILBOX_t *mb;
struct lpfc_dmabuf *mp;
int rc;
pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
if (!pmb) {
return -ENOMEM;
}
mb = &pmb->u.mb;
rc = lpfc_read_sparam(phba, pmb, vport->vpi);
if (rc) {
mempool_free(pmb, phba->mbox_mem_pool);
return -ENOMEM;
}
/*
* Wait for the read_sparams mailbox to complete. Driver needs
* this per vport to start the FDISC. If the mailbox fails,
* just cleanup and return an error unless the failure is a
* mailbox timeout. For MBX_TIMEOUT, allow the default
* mbox completion handler to take care of the cleanup. This
* is safe as the mailbox command isn't one that triggers
* another mailbox.
*/
pmb->vport = vport;
rc = lpfc_sli_issue_mbox_wait(phba, pmb, phba->fc_ratov * 2);
if (rc != MBX_SUCCESS) {
if (signal_pending(current)) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
"1830 Signal aborted mbxCmd x%x\n",
mb->mbxCommand);
if (rc != MBX_TIMEOUT)
lpfc_mbox_rsrc_cleanup(phba, pmb,
MBOX_THD_UNLOCKED);
return -EINTR;
} else {
lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
"1818 VPort failed init, mbxCmd x%x "
"READ_SPARM mbxStatus x%x, rc = x%x\n",
mb->mbxCommand, mb->mbxStatus, rc);
if (rc != MBX_TIMEOUT)
lpfc_mbox_rsrc_cleanup(phba, pmb,
MBOX_THD_UNLOCKED);
return -EIO;
}
}
mp = pmb->ctx_buf;
memcpy(&vport->fc_sparam, mp->virt, sizeof (struct serv_parm));
memcpy(&vport->fc_nodename, &vport->fc_sparam.nodeName,
sizeof (struct lpfc_name));
memcpy(&vport->fc_portname, &vport->fc_sparam.portName,
sizeof (struct lpfc_name));
lpfc_mbox_rsrc_cleanup(phba, pmb, MBOX_THD_UNLOCKED);
return 0;
}
static int
lpfc_valid_wwn_format(struct lpfc_hba *phba, struct lpfc_name *wwn,
const char *name_type)
{
/* ensure that IEEE format 1 addresses
* contain zeros in bits 59-48
*/
if (!((wwn->u.wwn[0] >> 4) == 1 &&
((wwn->u.wwn[0] & 0xf) != 0 || (wwn->u.wwn[1] & 0xf) != 0)))
return 1;
lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
"1822 Invalid %s: %02x:%02x:%02x:%02x:"
"%02x:%02x:%02x:%02x\n",
name_type,
wwn->u.wwn[0], wwn->u.wwn[1],
wwn->u.wwn[2], wwn->u.wwn[3],
wwn->u.wwn[4], wwn->u.wwn[5],
wwn->u.wwn[6], wwn->u.wwn[7]);
return 0;
}
static int
lpfc_unique_wwpn(struct lpfc_hba *phba, struct lpfc_vport *new_vport)
{
struct lpfc_vport *vport;
unsigned long flags;
spin_lock_irqsave(&phba->port_list_lock, flags);
list_for_each_entry(vport, &phba->port_list, listentry) {
if (vport == new_vport)
continue;
/* If they match, return not unique */
if (memcmp(&vport->fc_sparam.portName,
&new_vport->fc_sparam.portName,
sizeof(struct lpfc_name)) == 0) {
spin_unlock_irqrestore(&phba->port_list_lock, flags);
return 0;
}
}
spin_unlock_irqrestore(&phba->port_list_lock, flags);
return 1;
}
/**
* lpfc_discovery_wait - Wait for driver discovery to quiesce
* @vport: The virtual port for which this call is being executed.
*
* This driver calls this routine specifically from lpfc_vport_delete
* to enforce a synchronous execution of vport
* delete relative to discovery activities. The
* lpfc_vport_delete routine should not return until it
* can reasonably guarantee that discovery has quiesced.
* Post FDISC LOGO, the driver must wait until its SAN teardown is
* complete and all resources recovered before allowing
* cleanup.
*
* This routine does not require any locks held.
**/
static void lpfc_discovery_wait(struct lpfc_vport *vport)
{
struct lpfc_hba *phba = vport->phba;
unsigned long wait_time_max;
unsigned long start_time;
/*
* The time constraint on this loop is a balance between the
* fabric RA_TOV value and dev_loss tmo. The driver's
* devloss_tmo is 10 giving this loop a 3x multiplier minimally.
*/
wait_time_max = msecs_to_jiffies(((phba->fc_ratov * 3) + 3) * 1000);
wait_time_max += jiffies;
start_time = jiffies;
while (time_before(jiffies, wait_time_max)) {
if ((vport->num_disc_nodes > 0) ||
test_bit(FC_RSCN_MODE, &vport->fc_flag) ||
test_bit(FC_RSCN_DISCOVERY, &vport->fc_flag) ||
test_bit(FC_NLP_MORE, &vport->fc_flag) ||
test_bit(FC_RSCN_DEFERRED, &vport->fc_flag) ||
test_bit(FC_NDISC_ACTIVE, &vport->fc_flag) ||
test_bit(FC_DISC_TMO, &vport->fc_flag) ||
((vport->port_state > LPFC_VPORT_FAILED) &&
(vport->port_state < LPFC_VPORT_READY))) {
lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT,
"1833 Vport discovery quiesce Wait: "
"state x%x fc_flags x%lx "
"num_nodes x%x, waiting 1000 msecs "
"total wait msecs x%x\n",
vport->port_state, vport->fc_flag,
vport->num_disc_nodes,
jiffies_to_msecs(jiffies - start_time));
msleep(1000);
} else {
/* Base case. Wait variants satisfied. Break out */
lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT,
"1834 Vport discovery quiesced: "
"state x%x fc_flags x%lx "
"wait msecs x%x\n",
vport->port_state, vport->fc_flag,
jiffies_to_msecs(jiffies
- start_time));
break;
}
}
if (time_after(jiffies, wait_time_max))
lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
"1835 Vport discovery quiesce failed:"
" state x%x fc_flags x%lx wait msecs x%x\n",
vport->port_state, vport->fc_flag,
jiffies_to_msecs(jiffies - start_time));
}
int
lpfc_vport_create(struct fc_vport *fc_vport, bool disable)
{
struct lpfc_nodelist *ndlp;
struct Scsi_Host *shost = fc_vport->shost;
struct lpfc_vport *pport = (struct lpfc_vport *) shost->hostdata;
struct lpfc_hba *phba = pport->phba;
struct lpfc_vport *vport = NULL;
int instance;
int vpi;
int rc = VPORT_ERROR;
int status;
if ((phba->sli_rev < 3) || !(phba->cfg_enable_npiv)) {
lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
"1808 Create VPORT failed: "
"NPIV is not enabled: SLImode:%d\n",
phba->sli_rev);
rc = VPORT_INVAL;
goto error_out;
}
/* NPIV is not supported if HBA has NVME Target enabled */
if (phba->nvmet_support) {
lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
"3189 Create VPORT failed: "
"NPIV is not supported on NVME Target\n");
rc = VPORT_INVAL;
goto error_out;
}
vpi = lpfc_alloc_vpi(phba);
if (vpi == 0) {
lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
"1809 Create VPORT failed: "
"Max VPORTs (%d) exceeded\n",
phba->max_vpi);
rc = VPORT_NORESOURCES;
goto error_out;
}
/* Assign an unused board number */
if ((instance = lpfc_get_instance()) < 0) {
lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
"1810 Create VPORT failed: Cannot get "
"instance number\n");
lpfc_free_vpi(phba, vpi);
rc = VPORT_NORESOURCES;
goto error_out;
}
vport = lpfc_create_port(phba, instance, &fc_vport->dev);
if (!vport) {
lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
"1811 Create VPORT failed: vpi x%x\n", vpi);
lpfc_free_vpi(phba, vpi);
rc = VPORT_NORESOURCES;
goto error_out;
}
vport->vpi = vpi;
lpfc_debugfs_initialize(vport);
if ((status = lpfc_vport_sparm(phba, vport))) {
if (status == -EINTR) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
"1831 Create VPORT Interrupted.\n");
rc = VPORT_ERROR;
} else {
lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
"1813 Create VPORT failed. "
"Cannot get sparam\n");
rc = VPORT_NORESOURCES;
}
lpfc_free_vpi(phba, vpi);
destroy_port(vport);
goto error_out;
}
u64_to_wwn(fc_vport->node_name, vport->fc_nodename.u.wwn);
u64_to_wwn(fc_vport->port_name, vport->fc_portname.u.wwn);
memcpy(&vport->fc_sparam.portName, vport->fc_portname.u.wwn, 8);
memcpy(&vport->fc_sparam.nodeName, vport->fc_nodename.u.wwn, 8);
if (!lpfc_valid_wwn_format(phba, &vport->fc_sparam.nodeName, "WWNN") ||
!lpfc_valid_wwn_format(phba, &vport->fc_sparam.portName, "WWPN")) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
"1821 Create VPORT failed. "
"Invalid WWN format\n");
lpfc_free_vpi(phba, vpi);
destroy_port(vport);
rc = VPORT_INVAL;
goto error_out;
}
if (!lpfc_unique_wwpn(phba, vport)) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
"1823 Create VPORT failed. "
"Duplicate WWN on HBA\n");
lpfc_free_vpi(phba, vpi);
destroy_port(vport);
rc = VPORT_INVAL;
goto error_out;
}
/* Create binary sysfs attribute for vport */
lpfc_alloc_sysfs_attr(vport);
/* Set the DFT_LUN_Q_DEPTH accordingly */
vport->cfg_lun_queue_depth = phba->pport->cfg_lun_queue_depth;
/* Only the physical port can support NVME for now */
vport->cfg_enable_fc4_type = LPFC_ENABLE_FCP;
*(struct lpfc_vport **)fc_vport->dd_data = vport;
vport->fc_vport = fc_vport;
/* At this point we are fully registered with SCSI Layer. */
set_bit(FC_ALLOW_FDMI, &vport->load_flag);
if (phba->cfg_enable_SmartSAN ||
(phba->cfg_fdmi_on == LPFC_FDMI_SUPPORT)) {
/* Setup appropriate attribute masks */
vport->fdmi_hba_mask = phba->pport->fdmi_hba_mask;
vport->fdmi_port_mask = phba->pport->fdmi_port_mask;
}
/*
* In SLI4, the vpi must be activated before it can be used
* by the port.
*/
if ((phba->sli_rev == LPFC_SLI_REV4) &&
test_bit(FC_VFI_REGISTERED, &pport->fc_flag)) {
rc = lpfc_sli4_init_vpi(vport);
if (rc) {
lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
"1838 Failed to INIT_VPI on vpi %d "
"status %d\n", vpi, rc);
rc = VPORT_NORESOURCES;
lpfc_free_vpi(phba, vpi);
goto error_out;
}
} else if (phba->sli_rev == LPFC_SLI_REV4) {
/*
* Driver cannot INIT_VPI now. Set the flags to
* init_vpi when reg_vfi complete.
*/
set_bit(FC_VPORT_NEEDS_INIT_VPI, &vport->fc_flag);
lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
rc = VPORT_OK;
goto out;
}
if ((phba->link_state < LPFC_LINK_UP) ||
(pport->port_state < LPFC_FABRIC_CFG_LINK) ||
(phba->fc_topology == LPFC_TOPOLOGY_LOOP)) {
lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
rc = VPORT_OK;
goto out;
}
if (disable) {
lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
rc = VPORT_OK;
goto out;
}
/* Use the Physical nodes Fabric NDLP to determine if the link is
* up and ready to FDISC.
*/
ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
if (ndlp &&
ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
lpfc_set_disctmo(vport);
lpfc_initial_fdisc(vport);
} else {
lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
"0262 No NPIV Fabric support\n");
}
} else {
lpfc_vport_set_state(vport, FC_VPORT_FAILED);
}
rc = VPORT_OK;
out:
lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
"1825 Vport Created.\n");
lpfc_host_attrib_init(lpfc_shost_from_vport(vport));
error_out:
return rc;
}
static int
lpfc_send_npiv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
{
int rc;
struct lpfc_hba *phba = vport->phba;
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
spin_lock_irq(&ndlp->lock);
if (!(ndlp->save_flags & NLP_WAIT_FOR_LOGO) &&
!ndlp->logo_waitq) {
ndlp->logo_waitq = &waitq;
ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
ndlp->nlp_flag |= NLP_ISSUE_LOGO;
ndlp->save_flags |= NLP_WAIT_FOR_LOGO;
}
spin_unlock_irq(&ndlp->lock);
rc = lpfc_issue_els_npiv_logo(vport, ndlp);
if (!rc) {
wait_event_timeout(waitq,
(!(ndlp->save_flags & NLP_WAIT_FOR_LOGO)),
msecs_to_jiffies(phba->fc_ratov * 2000));
if (!(ndlp->save_flags & NLP_WAIT_FOR_LOGO))
goto logo_cmpl;
/* LOGO wait failed. Correct status. */
rc = -EINTR;
} else {
rc = -EIO;
}
/* Error - clean up node flags. */
spin_lock_irq(&ndlp->lock);
ndlp->nlp_flag &= ~NLP_ISSUE_LOGO;
ndlp->save_flags &= ~NLP_WAIT_FOR_LOGO;
spin_unlock_irq(&ndlp->lock);
logo_cmpl:
lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT,
"1824 Issue LOGO completes with status %d\n",
rc);
spin_lock_irq(&ndlp->lock);
ndlp->logo_waitq = NULL;
spin_unlock_irq(&ndlp->lock);
return rc;
}
static int
disable_vport(struct fc_vport *fc_vport)
{
struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
struct lpfc_hba *phba = vport->phba;
struct lpfc_nodelist *ndlp = NULL;
/* Can't disable during an outstanding delete. */
if (test_bit(FC_UNLOADING, &vport->load_flag))
return 0;
ndlp = lpfc_findnode_did(vport, Fabric_DID);
if (ndlp && phba->link_state >= LPFC_LINK_UP)
(void)lpfc_send_npiv_logo(vport, ndlp);
lpfc_sli_host_down(vport);
lpfc_cleanup_rpis(vport, 0);
lpfc_stop_vport_timers(vport);
lpfc_unreg_all_rpis(vport);
lpfc_unreg_default_rpis(vport);
/*
* Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi) does the
* scsi_host_put() to release the vport.
*/
lpfc_mbx_unreg_vpi(vport);
if (phba->sli_rev == LPFC_SLI_REV4)
set_bit(FC_VPORT_NEEDS_INIT_VPI, &vport->fc_flag);
lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
"1826 Vport Disabled.\n");
return VPORT_OK;
}
static int
enable_vport(struct fc_vport *fc_vport)
{
struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
struct lpfc_hba *phba = vport->phba;
struct lpfc_nodelist *ndlp = NULL;
if ((phba->link_state < LPFC_LINK_UP) ||
(phba->fc_topology == LPFC_TOPOLOGY_LOOP)) {
lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
return VPORT_OK;
}
set_bit(FC_LOADING, &vport->load_flag);
if (test_bit(FC_VPORT_NEEDS_INIT_VPI, &vport->fc_flag)) {
lpfc_issue_init_vpi(vport);
goto out;
}
set_bit(FC_VPORT_NEEDS_REG_VPI, &vport->fc_flag);
/* Use the Physical nodes Fabric NDLP to determine if the link is
* up and ready to FDISC.
*/
ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
if (ndlp && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
lpfc_set_disctmo(vport);
lpfc_initial_fdisc(vport);
} else {
lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
"0264 No NPIV Fabric support\n");
}
} else {
lpfc_vport_set_state(vport, FC_VPORT_FAILED);
}
out:
lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
"1827 Vport Enabled.\n");
return VPORT_OK;
}
int
lpfc_vport_disable(struct fc_vport *fc_vport, bool disable)
{
if (disable)
return disable_vport(fc_vport);
else
return enable_vport(fc_vport);
}
int
lpfc_vport_delete(struct fc_vport *fc_vport)
{
struct lpfc_nodelist *ndlp = NULL;
struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
struct lpfc_hba *phba = vport->phba;
int rc;
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
if (vport->port_type == LPFC_PHYSICAL_PORT) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
"1812 vport_delete failed: Cannot delete "
"physical host\n");
return VPORT_ERROR;
}
/* If the vport is a static vport fail the deletion. */
if ((vport->vport_flag & STATIC_VPORT) &&
!test_bit(FC_UNLOADING, &phba->pport->load_flag)) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
"1837 vport_delete failed: Cannot delete "
"static vport.\n");
return VPORT_ERROR;
}
set_bit(FC_UNLOADING, &vport->load_flag);
/*
* If we are not unloading the driver then prevent the vport_delete
* from happening until after this vport's discovery is finished.
*/
if (!test_bit(FC_UNLOADING, &phba->pport->load_flag)) {
int check_count = 0;
while (check_count < ((phba->fc_ratov * 3) + 3) &&
vport->port_state > LPFC_VPORT_FAILED &&
vport->port_state < LPFC_VPORT_READY) {
check_count++;
msleep(1000);
}
if (vport->port_state > LPFC_VPORT_FAILED &&
vport->port_state < LPFC_VPORT_READY)
return -EAGAIN;
}
/*
* Take early refcount for outstanding I/O requests we schedule during
* delete processing for unreg_vpi. Always keep this before
* scsi_remove_host() as we can no longer obtain a reference through
* scsi_host_get() after scsi_host_remove as shost is set to SHOST_DEL.
*/
if (!scsi_host_get(shost))
return VPORT_INVAL;
lpfc_free_sysfs_attr(vport);
lpfc_debugfs_terminate(vport);
/* Send the DA_ID and Fabric LOGO to cleanup Nameserver entries. */
ndlp = lpfc_findnode_did(vport, Fabric_DID);
if (!ndlp)
goto skip_logo;
/* Send the DA_ID and Fabric LOGO to cleanup the NPIV fabric entries. */
if (ndlp && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
phba->link_state >= LPFC_LINK_UP &&
phba->fc_topology != LPFC_TOPOLOGY_LOOP) {
if (vport->cfg_enable_da_id) {
/* Send DA_ID and wait for a completion. This is best
* effort. If the DA_ID fails, likely the fabric will
* "leak" NportIDs but at least the driver issued the
* command.
*/
ndlp = lpfc_findnode_did(vport, NameServer_DID);
if (!ndlp)
goto issue_logo;
spin_lock_irq(&ndlp->lock);
ndlp->da_id_waitq = &waitq;
ndlp->save_flags |= NLP_WAIT_FOR_DA_ID;
spin_unlock_irq(&ndlp->lock);
rc = lpfc_ns_cmd(vport, SLI_CTNS_DA_ID, 0, 0);
if (!rc) {
wait_event_timeout(waitq,
!(ndlp->save_flags & NLP_WAIT_FOR_DA_ID),
msecs_to_jiffies(phba->fc_ratov * 2000));
}
lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT | LOG_ELS,
"1829 DA_ID issue status %d. "
"SFlag x%x NState x%x, NFlag x%x "
"Rpi x%x\n",
rc, ndlp->save_flags, ndlp->nlp_state,
ndlp->nlp_flag, ndlp->nlp_rpi);
/* Remove the waitq and save_flags. It no
* longer matters if the wake happened.
*/
spin_lock_irq(&ndlp->lock);
ndlp->da_id_waitq = NULL;
ndlp->save_flags &= ~NLP_WAIT_FOR_DA_ID;
spin_unlock_irq(&ndlp->lock);
}
issue_logo:
/*
* If the vpi is not registered, then a valid FDISC doesn't
* exist and there is no need for a ELS LOGO. Just cleanup
* the ndlp.
*/
if (!(vport->vpi_state & LPFC_VPI_REGISTERED))
goto skip_logo;
/* Issue a Fabric LOGO to cleanup fabric resources. */
ndlp = lpfc_findnode_did(vport, Fabric_DID);
if (!ndlp)
goto skip_logo;
rc = lpfc_send_npiv_logo(vport, ndlp);
if (rc)
goto skip_logo;
}
if (!test_bit(FC_UNLOADING, &phba->pport->load_flag))
lpfc_discovery_wait(vport);
skip_logo:
/* Remove FC host to break driver binding. */
fc_remove_host(shost);
scsi_remove_host(shost);
lpfc_cleanup(vport);
/* Remove scsi host now. The nodes are cleaned up. */
lpfc_sli_host_down(vport);
lpfc_stop_vport_timers(vport);
if (!test_bit(FC_UNLOADING, &phba->pport->load_flag)) {
lpfc_unreg_all_rpis(vport);
lpfc_unreg_default_rpis(vport);
/*
* Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi)
* does the scsi_host_put() to release the vport.
*/
if (!(vport->vpi_state & LPFC_VPI_REGISTERED) ||
lpfc_mbx_unreg_vpi(vport))
scsi_host_put(shost);
} else {
scsi_host_put(shost);
}
lpfc_free_vpi(phba, vport->vpi);
vport->work_port_events = 0;
spin_lock_irq(&phba->port_list_lock);
list_del_init(&vport->listentry);
spin_unlock_irq(&phba->port_list_lock);
lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
"1828 Vport Deleted.\n");
scsi_host_put(shost);
return VPORT_OK;
}
struct lpfc_vport **
lpfc_create_vport_work_array(struct lpfc_hba *phba)
{
struct lpfc_vport *port_iterator;
struct lpfc_vport **vports;
int index = 0;
vports = kcalloc(phba->max_vports + 1, sizeof(struct lpfc_vport *),
GFP_KERNEL);
if (vports == NULL)
return NULL;
spin_lock_irq(&phba->port_list_lock);
list_for_each_entry(port_iterator, &phba->port_list, listentry) {
if (test_bit(FC_UNLOADING, &port_iterator->load_flag))
continue;
if (!scsi_host_get(lpfc_shost_from_vport(port_iterator))) {
lpfc_printf_vlog(port_iterator, KERN_ERR,
LOG_TRACE_EVENT,
"1801 Create vport work array FAILED: "
"cannot do scsi_host_get\n");
continue;
}
vports[index++] = port_iterator;
}
spin_unlock_irq(&phba->port_list_lock);
return vports;
}
void
lpfc_destroy_vport_work_array(struct lpfc_hba *phba, struct lpfc_vport **vports)
{
int i;
if (vports == NULL)
return;
for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++)
scsi_host_put(lpfc_shost_from_vport(vports[i]));
kfree(vports);
}
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