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qla2xxx: Configure NPIV fc_vport via tcm_qla2xxx_npiv_make_lport
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This patch changes qla2xxx qlt_lport_register() code to accept
target_lport_ptr + npiv_wwpn + npiv_wwnn parameters, and updates
tcm_qla2xxx to use the new tcm_qla2xxx_lport_register_npiv_cb()
callback for invoking fc_vport_create() from configfs context
via tcm_qla2xxx_npiv_make_lport() code.

In order for this to work, the qlt_lport_register() callback is
now called without holding qla_tgt_mutex, as the fc_vport creation
process will call qlt_vport_create() -> qlt_add_target(), which
already expects to acquire it.

It enforces /sys/kernel/config/target/qla2xxx_npiv/$NPIV_WWPN
naming in the following format:

     $PHYSICAL_WWPN@$NPIV_WWPN:$NPIV_WWNN

and assumes the $PHYSICAL_WWPN in question has already had been
configured for target mode in non NPIV mode.

Finally, it updates existing tcm_qla2xxx_lport_register_cb() logic
to setup the non NPIV assignments that have now been moved out of
qlt_lport_register() code.

Cc: Sawan Chandak <sawan.chandak@qlogic.com>
Cc: Quinn Tran <quinn.tran@qlogic.com>
Cc: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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Nicholas Bellinger committed Jan 19, 2014
1 parent 0e8cd71 commit 49a47f2
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Showing 3 changed files with 88 additions and 47 deletions.
25 changes: 10 additions & 15 deletions drivers/scsi/qla2xxx/qla_target.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -4235,8 +4235,9 @@ static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
* @callback: lport initialization callback for tcm_qla2xxx code
* @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
*/
int qlt_lport_register(struct qla_tgt_func_tmpl *qla_tgt_ops, u64 wwpn,
int (*callback)(struct scsi_qla_host *), void *target_lport_ptr)
int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
u64 npiv_wwpn, u64 npiv_wwnn,
int (*callback)(struct scsi_qla_host *, void *, u64, u64))
{
struct qla_tgt *tgt;
struct scsi_qla_host *vha;
Expand All @@ -4259,7 +4260,7 @@ int qlt_lport_register(struct qla_tgt_func_tmpl *qla_tgt_ops, u64 wwpn,
continue;

spin_lock_irqsave(&ha->hardware_lock, flags);
if (host->active_mode & MODE_TARGET) {
if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
host->host_no);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
Expand All @@ -4273,24 +4274,18 @@ int qlt_lport_register(struct qla_tgt_func_tmpl *qla_tgt_ops, u64 wwpn,
" qla2xxx scsi_host\n");
continue;
}
qlt_lport_dump(vha, wwpn, b);
qlt_lport_dump(vha, phys_wwpn, b);

if (memcmp(vha->port_name, b, WWN_SIZE)) {
scsi_host_put(host);
continue;
}
/*
* Setup passed parameters ahead of invoking callback
*/
ha->tgt.tgt_ops = qla_tgt_ops;
vha->vha_tgt.target_lport_ptr = target_lport_ptr;
rc = (*callback)(vha);
if (rc != 0) {
ha->tgt.tgt_ops = NULL;
vha->vha_tgt.target_lport_ptr = NULL;
scsi_host_put(host);
}
mutex_unlock(&qla_tgt_mutex);

rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
if (rc != 0)
scsi_host_put(host);

return rc;
}
mutex_unlock(&qla_tgt_mutex);
Expand Down
4 changes: 2 additions & 2 deletions drivers/scsi/qla2xxx/qla_target.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -932,8 +932,8 @@ void qlt_disable_vha(struct scsi_qla_host *);
*/
extern int qlt_add_target(struct qla_hw_data *, struct scsi_qla_host *);
extern int qlt_remove_target(struct qla_hw_data *, struct scsi_qla_host *);
extern int qlt_lport_register(struct qla_tgt_func_tmpl *, u64,
int (*callback)(struct scsi_qla_host *), void *);
extern int qlt_lport_register(void *, u64, u64, u64,
int (*callback)(struct scsi_qla_host *, void *, u64, u64));
extern void qlt_lport_deregister(struct scsi_qla_host *);
extern void qlt_unreg_sess(struct qla_tgt_sess *);
extern void qlt_fc_port_added(struct scsi_qla_host *, fc_port_t *);
Expand Down
106 changes: 76 additions & 30 deletions drivers/scsi/qla2xxx/tcm_qla2xxx.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1559,14 +1559,18 @@ static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
return 0;
}

static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha)
static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
void *target_lport_ptr,
u64 npiv_wwpn, u64 npiv_wwnn)
{
struct tcm_qla2xxx_lport *lport;
struct qla_hw_data *ha = vha->hw;
struct tcm_qla2xxx_lport *lport =
(struct tcm_qla2xxx_lport *)target_lport_ptr;
/*
* Setup local pointer to vha, NPIV VP pointer (if present) and
* vha->tcm_lport pointer
* Setup tgt_ops, local pointer to vha and target_lport_ptr
*/
lport = (struct tcm_qla2xxx_lport *)vha->vha_tgt.target_lport_ptr;
ha->tgt.tgt_ops = &tcm_qla2xxx_template;
vha->vha_tgt.target_lport_ptr = target_lport_ptr;
lport->qla_vha = vha;

return 0;
Expand Down Expand Up @@ -1598,8 +1602,8 @@ static struct se_wwn *tcm_qla2xxx_make_lport(
if (ret != 0)
goto out;

ret = qlt_lport_register(&tcm_qla2xxx_template, wwpn,
tcm_qla2xxx_lport_register_cb, lport);
ret = qlt_lport_register(lport, wwpn, 0, 0,
tcm_qla2xxx_lport_register_cb);
if (ret != 0)
goto out_lport;

Expand Down Expand Up @@ -1637,20 +1641,70 @@ static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
kfree(lport);
}

static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
void *target_lport_ptr,
u64 npiv_wwpn, u64 npiv_wwnn)
{
struct fc_vport *vport;
struct Scsi_Host *sh = base_vha->host;
struct scsi_qla_host *npiv_vha;
struct tcm_qla2xxx_lport *lport =
(struct tcm_qla2xxx_lport *)target_lport_ptr;
struct fc_vport_identifiers vport_id;

if (!qla_tgt_mode_enabled(base_vha)) {
pr_err("qla2xxx base_vha not enabled for target mode\n");
return -EPERM;
}

memset(&vport_id, 0, sizeof(vport_id));
vport_id.port_name = npiv_wwpn;
vport_id.node_name = npiv_wwnn;
vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
vport_id.vport_type = FC_PORTTYPE_NPIV;
vport_id.disable = false;

vport = fc_vport_create(sh, 0, &vport_id);
if (!vport) {
pr_err("fc_vport_create failed for qla2xxx_npiv\n");
return -ENODEV;
}
/*
* Setup local pointer to NPIV vhba + target_lport_ptr
*/
npiv_vha = (struct scsi_qla_host *)vport->dd_data;
npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
lport->qla_vha = npiv_vha;

scsi_host_get(npiv_vha->host);
return 0;
}


static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
struct target_fabric_configfs *tf,
struct config_group *group,
const char *name)
{
struct tcm_qla2xxx_lport *lport;
u64 npiv_wwpn, npiv_wwnn;
u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
char *p, tmp[128];
int ret;
struct scsi_qla_host *vha = NULL;
struct qla_hw_data *ha = NULL;
scsi_qla_host_t *base_vha = NULL;

if (tcm_qla2xxx_npiv_parse_wwn(name, strlen(name)+1,
&npiv_wwpn, &npiv_wwnn) < 0)
snprintf(tmp, 128, "%s", name);

p = strchr(tmp, '@');
if (!p) {
pr_err("Unable to locate NPIV '@' seperator\n");
return ERR_PTR(-EINVAL);
}
*p++ = '\0';

if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
return ERR_PTR(-EINVAL);

if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
&npiv_wwpn, &npiv_wwnn) < 0)
return ERR_PTR(-EINVAL);

lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
Expand All @@ -1668,21 +1722,11 @@ static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
if (ret != 0)
goto out;

ret = qlt_lport_register(&tcm_qla2xxx_template, npiv_wwpn,
tcm_qla2xxx_lport_register_cb, lport);

ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
tcm_qla2xxx_lport_register_npiv_cb);
if (ret != 0)
goto out_lport;

vha = lport->qla_vha;
ha = vha->hw;
base_vha = pci_get_drvdata(ha->pdev);

if (!qla_tgt_mode_enabled(base_vha)) {
ret = -EPERM;
goto out_lport;
}

return &lport->lport_wwn;
out_lport:
vfree(lport->lport_loopid_map);
Expand All @@ -1696,14 +1740,16 @@ static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
{
struct tcm_qla2xxx_lport *lport = container_of(wwn,
struct tcm_qla2xxx_lport, lport_wwn);
struct scsi_qla_host *vha = lport->qla_vha;
struct Scsi_Host *sh = vha->host;
struct scsi_qla_host *npiv_vha = lport->qla_vha;
struct qla_hw_data *ha = npiv_vha->hw;
scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);

scsi_host_put(npiv_vha->host);
/*
* Notify libfc that we want to release the vha->fc_vport
*/
fc_vport_terminate(vha->fc_vport);

scsi_host_put(sh);
fc_vport_terminate(npiv_vha->fc_vport);
scsi_host_put(base_vha->host);
kfree(lport);
}

Expand Down

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