linux/drivers/s390/scsi/zfcp_fc.c

876 lines
23 KiB
C

/*
* zfcp device driver
*
* Fibre Channel related functions for the zfcp device driver.
*
* Copyright IBM Corporation 2008, 2010
*/
#define KMSG_COMPONENT "zfcp"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/types.h>
#include <linux/slab.h>
#include <scsi/fc/fc_els.h>
#include <scsi/libfc.h>
#include "zfcp_ext.h"
#include "zfcp_fc.h"
static u32 zfcp_fc_rscn_range_mask[] = {
[ELS_ADDR_FMT_PORT] = 0xFFFFFF,
[ELS_ADDR_FMT_AREA] = 0xFFFF00,
[ELS_ADDR_FMT_DOM] = 0xFF0000,
[ELS_ADDR_FMT_FAB] = 0x000000,
};
/**
* zfcp_fc_post_event - post event to userspace via fc_transport
* @work: work struct with enqueued events
*/
void zfcp_fc_post_event(struct work_struct *work)
{
struct zfcp_fc_event *event = NULL, *tmp = NULL;
LIST_HEAD(tmp_lh);
struct zfcp_fc_events *events = container_of(work,
struct zfcp_fc_events, work);
struct zfcp_adapter *adapter = container_of(events, struct zfcp_adapter,
events);
spin_lock_bh(&events->list_lock);
list_splice_init(&events->list, &tmp_lh);
spin_unlock_bh(&events->list_lock);
list_for_each_entry_safe(event, tmp, &tmp_lh, list) {
fc_host_post_event(adapter->scsi_host, fc_get_event_number(),
event->code, event->data);
list_del(&event->list);
kfree(event);
}
}
/**
* zfcp_fc_enqueue_event - safely enqueue FC HBA API event from irq context
* @adapter: The adapter where to enqueue the event
* @event_code: The event code (as defined in fc_host_event_code in
* scsi_transport_fc.h)
* @event_data: The event data (e.g. n_port page in case of els)
*/
void zfcp_fc_enqueue_event(struct zfcp_adapter *adapter,
enum fc_host_event_code event_code, u32 event_data)
{
struct zfcp_fc_event *event;
event = kmalloc(sizeof(struct zfcp_fc_event), GFP_ATOMIC);
if (!event)
return;
event->code = event_code;
event->data = event_data;
spin_lock(&adapter->events.list_lock);
list_add_tail(&event->list, &adapter->events.list);
spin_unlock(&adapter->events.list_lock);
queue_work(adapter->work_queue, &adapter->events.work);
}
static int zfcp_fc_wka_port_get(struct zfcp_fc_wka_port *wka_port)
{
if (mutex_lock_interruptible(&wka_port->mutex))
return -ERESTARTSYS;
if (wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE ||
wka_port->status == ZFCP_FC_WKA_PORT_CLOSING) {
wka_port->status = ZFCP_FC_WKA_PORT_OPENING;
if (zfcp_fsf_open_wka_port(wka_port))
wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
}
mutex_unlock(&wka_port->mutex);
wait_event(wka_port->completion_wq,
wka_port->status == ZFCP_FC_WKA_PORT_ONLINE ||
wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE);
if (wka_port->status == ZFCP_FC_WKA_PORT_ONLINE) {
atomic_inc(&wka_port->refcount);
return 0;
}
return -EIO;
}
static void zfcp_fc_wka_port_offline(struct work_struct *work)
{
struct delayed_work *dw = to_delayed_work(work);
struct zfcp_fc_wka_port *wka_port =
container_of(dw, struct zfcp_fc_wka_port, work);
mutex_lock(&wka_port->mutex);
if ((atomic_read(&wka_port->refcount) != 0) ||
(wka_port->status != ZFCP_FC_WKA_PORT_ONLINE))
goto out;
wka_port->status = ZFCP_FC_WKA_PORT_CLOSING;
if (zfcp_fsf_close_wka_port(wka_port)) {
wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
wake_up(&wka_port->completion_wq);
}
out:
mutex_unlock(&wka_port->mutex);
}
static void zfcp_fc_wka_port_put(struct zfcp_fc_wka_port *wka_port)
{
if (atomic_dec_return(&wka_port->refcount) != 0)
return;
/* wait 10 milliseconds, other reqs might pop in */
schedule_delayed_work(&wka_port->work, HZ / 100);
}
static void zfcp_fc_wka_port_init(struct zfcp_fc_wka_port *wka_port, u32 d_id,
struct zfcp_adapter *adapter)
{
init_waitqueue_head(&wka_port->completion_wq);
wka_port->adapter = adapter;
wka_port->d_id = d_id;
wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
atomic_set(&wka_port->refcount, 0);
mutex_init(&wka_port->mutex);
INIT_DELAYED_WORK(&wka_port->work, zfcp_fc_wka_port_offline);
}
static void zfcp_fc_wka_port_force_offline(struct zfcp_fc_wka_port *wka)
{
cancel_delayed_work_sync(&wka->work);
mutex_lock(&wka->mutex);
wka->status = ZFCP_FC_WKA_PORT_OFFLINE;
mutex_unlock(&wka->mutex);
}
void zfcp_fc_wka_ports_force_offline(struct zfcp_fc_wka_ports *gs)
{
if (!gs)
return;
zfcp_fc_wka_port_force_offline(&gs->ms);
zfcp_fc_wka_port_force_offline(&gs->ts);
zfcp_fc_wka_port_force_offline(&gs->ds);
zfcp_fc_wka_port_force_offline(&gs->as);
}
static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range,
struct fc_els_rscn_page *page)
{
unsigned long flags;
struct zfcp_adapter *adapter = fsf_req->adapter;
struct zfcp_port *port;
read_lock_irqsave(&adapter->port_list_lock, flags);
list_for_each_entry(port, &adapter->port_list, list) {
if ((port->d_id & range) == (ntoh24(page->rscn_fid) & range))
zfcp_fc_test_link(port);
if (!port->d_id)
zfcp_erp_port_reopen(port,
ZFCP_STATUS_COMMON_ERP_FAILED,
"fcrscn1");
}
read_unlock_irqrestore(&adapter->port_list_lock, flags);
}
static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req)
{
struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data;
struct fc_els_rscn *head;
struct fc_els_rscn_page *page;
u16 i;
u16 no_entries;
unsigned int afmt;
head = (struct fc_els_rscn *) status_buffer->payload.data;
page = (struct fc_els_rscn_page *) head;
/* see FC-FS */
no_entries = head->rscn_plen / sizeof(struct fc_els_rscn_page);
for (i = 1; i < no_entries; i++) {
/* skip head and start with 1st element */
page++;
afmt = page->rscn_page_flags & ELS_RSCN_ADDR_FMT_MASK;
_zfcp_fc_incoming_rscn(fsf_req, zfcp_fc_rscn_range_mask[afmt],
page);
zfcp_fc_enqueue_event(fsf_req->adapter, FCH_EVT_RSCN,
*(u32 *)page);
}
queue_work(fsf_req->adapter->work_queue, &fsf_req->adapter->scan_work);
}
static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, u64 wwpn)
{
unsigned long flags;
struct zfcp_adapter *adapter = req->adapter;
struct zfcp_port *port;
read_lock_irqsave(&adapter->port_list_lock, flags);
list_for_each_entry(port, &adapter->port_list, list)
if (port->wwpn == wwpn) {
zfcp_erp_port_forced_reopen(port, 0, "fciwwp1");
break;
}
read_unlock_irqrestore(&adapter->port_list_lock, flags);
}
static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req)
{
struct fsf_status_read_buffer *status_buffer;
struct fc_els_flogi *plogi;
status_buffer = (struct fsf_status_read_buffer *) req->data;
plogi = (struct fc_els_flogi *) status_buffer->payload.data;
zfcp_fc_incoming_wwpn(req, plogi->fl_wwpn);
}
static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req)
{
struct fsf_status_read_buffer *status_buffer =
(struct fsf_status_read_buffer *)req->data;
struct fc_els_logo *logo =
(struct fc_els_logo *) status_buffer->payload.data;
zfcp_fc_incoming_wwpn(req, logo->fl_n_port_wwn);
}
/**
* zfcp_fc_incoming_els - handle incoming ELS
* @fsf_req - request which contains incoming ELS
*/
void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req)
{
struct fsf_status_read_buffer *status_buffer =
(struct fsf_status_read_buffer *) fsf_req->data;
unsigned int els_type = status_buffer->payload.data[0];
zfcp_dbf_san_in_els("fciels1", fsf_req);
if (els_type == ELS_PLOGI)
zfcp_fc_incoming_plogi(fsf_req);
else if (els_type == ELS_LOGO)
zfcp_fc_incoming_logo(fsf_req);
else if (els_type == ELS_RSCN)
zfcp_fc_incoming_rscn(fsf_req);
}
static void zfcp_fc_ns_gid_pn_eval(void *data)
{
struct zfcp_fc_gid_pn *gid_pn = data;
struct zfcp_fsf_ct_els *ct = &gid_pn->ct;
struct zfcp_fc_gid_pn_req *gid_pn_req = sg_virt(ct->req);
struct zfcp_fc_gid_pn_resp *gid_pn_resp = sg_virt(ct->resp);
struct zfcp_port *port = gid_pn->port;
if (ct->status)
return;
if (gid_pn_resp->ct_hdr.ct_cmd != FC_FS_ACC)
return;
/* paranoia */
if (gid_pn_req->gid_pn.fn_wwpn != port->wwpn)
return;
/* looks like a valid d_id */
port->d_id = ntoh24(gid_pn_resp->gid_pn.fp_fid);
}
static void zfcp_fc_complete(void *data)
{
complete(data);
}
static int zfcp_fc_ns_gid_pn_request(struct zfcp_port *port,
struct zfcp_fc_gid_pn *gid_pn)
{
struct zfcp_adapter *adapter = port->adapter;
DECLARE_COMPLETION_ONSTACK(completion);
int ret;
/* setup parameters for send generic command */
gid_pn->port = port;
gid_pn->ct.handler = zfcp_fc_complete;
gid_pn->ct.handler_data = &completion;
gid_pn->ct.req = &gid_pn->sg_req;
gid_pn->ct.resp = &gid_pn->sg_resp;
sg_init_one(&gid_pn->sg_req, &gid_pn->gid_pn_req,
sizeof(struct zfcp_fc_gid_pn_req));
sg_init_one(&gid_pn->sg_resp, &gid_pn->gid_pn_resp,
sizeof(struct zfcp_fc_gid_pn_resp));
/* setup nameserver request */
gid_pn->gid_pn_req.ct_hdr.ct_rev = FC_CT_REV;
gid_pn->gid_pn_req.ct_hdr.ct_fs_type = FC_FST_DIR;
gid_pn->gid_pn_req.ct_hdr.ct_fs_subtype = FC_NS_SUBTYPE;
gid_pn->gid_pn_req.ct_hdr.ct_options = 0;
gid_pn->gid_pn_req.ct_hdr.ct_cmd = FC_NS_GID_PN;
gid_pn->gid_pn_req.ct_hdr.ct_mr_size = ZFCP_FC_CT_SIZE_PAGE / 4;
gid_pn->gid_pn_req.gid_pn.fn_wwpn = port->wwpn;
ret = zfcp_fsf_send_ct(&adapter->gs->ds, &gid_pn->ct,
adapter->pool.gid_pn_req,
ZFCP_FC_CTELS_TMO);
if (!ret) {
wait_for_completion(&completion);
zfcp_fc_ns_gid_pn_eval(gid_pn);
}
return ret;
}
/**
* zfcp_fc_ns_gid_pn_request - initiate GID_PN nameserver request
* @port: port where GID_PN request is needed
* return: -ENOMEM on error, 0 otherwise
*/
static int zfcp_fc_ns_gid_pn(struct zfcp_port *port)
{
int ret;
struct zfcp_fc_gid_pn *gid_pn;
struct zfcp_adapter *adapter = port->adapter;
gid_pn = mempool_alloc(adapter->pool.gid_pn, GFP_ATOMIC);
if (!gid_pn)
return -ENOMEM;
memset(gid_pn, 0, sizeof(*gid_pn));
ret = zfcp_fc_wka_port_get(&adapter->gs->ds);
if (ret)
goto out;
ret = zfcp_fc_ns_gid_pn_request(port, gid_pn);
zfcp_fc_wka_port_put(&adapter->gs->ds);
out:
mempool_free(gid_pn, adapter->pool.gid_pn);
return ret;
}
void zfcp_fc_port_did_lookup(struct work_struct *work)
{
int ret;
struct zfcp_port *port = container_of(work, struct zfcp_port,
gid_pn_work);
ret = zfcp_fc_ns_gid_pn(port);
if (ret) {
/* could not issue gid_pn for some reason */
zfcp_erp_adapter_reopen(port->adapter, 0, "fcgpn_1");
goto out;
}
if (!port->d_id) {
zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ERP_FAILED);
goto out;
}
zfcp_erp_port_reopen(port, 0, "fcgpn_3");
out:
put_device(&port->dev);
}
/**
* zfcp_fc_trigger_did_lookup - trigger the d_id lookup using a GID_PN request
* @port: The zfcp_port to lookup the d_id for.
*/
void zfcp_fc_trigger_did_lookup(struct zfcp_port *port)
{
get_device(&port->dev);
if (!queue_work(port->adapter->work_queue, &port->gid_pn_work))
put_device(&port->dev);
}
/**
* zfcp_fc_plogi_evaluate - evaluate PLOGI playload
* @port: zfcp_port structure
* @plogi: plogi payload
*
* Evaluate PLOGI playload and copy important fields into zfcp_port structure
*/
void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fc_els_flogi *plogi)
{
if (plogi->fl_wwpn != port->wwpn) {
port->d_id = 0;
dev_warn(&port->adapter->ccw_device->dev,
"A port opened with WWPN 0x%016Lx returned data that "
"identifies it as WWPN 0x%016Lx\n",
(unsigned long long) port->wwpn,
(unsigned long long) plogi->fl_wwpn);
return;
}
port->wwnn = plogi->fl_wwnn;
port->maxframe_size = plogi->fl_csp.sp_bb_data;
if (plogi->fl_cssp[0].cp_class & FC_CPC_VALID)
port->supported_classes |= FC_COS_CLASS1;
if (plogi->fl_cssp[1].cp_class & FC_CPC_VALID)
port->supported_classes |= FC_COS_CLASS2;
if (plogi->fl_cssp[2].cp_class & FC_CPC_VALID)
port->supported_classes |= FC_COS_CLASS3;
if (plogi->fl_cssp[3].cp_class & FC_CPC_VALID)
port->supported_classes |= FC_COS_CLASS4;
}
static void zfcp_fc_adisc_handler(void *data)
{
struct zfcp_fc_els_adisc *adisc = data;
struct zfcp_port *port = adisc->els.port;
struct fc_els_adisc *adisc_resp = &adisc->adisc_resp;
if (adisc->els.status) {
/* request rejected or timed out */
zfcp_erp_port_forced_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
"fcadh_1");
goto out;
}
if (!port->wwnn)
port->wwnn = adisc_resp->adisc_wwnn;
if ((port->wwpn != adisc_resp->adisc_wwpn) ||
!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)) {
zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
"fcadh_2");
goto out;
}
/* port is good, unblock rport without going through erp */
zfcp_scsi_schedule_rport_register(port);
out:
atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
put_device(&port->dev);
kmem_cache_free(zfcp_data.adisc_cache, adisc);
}
static int zfcp_fc_adisc(struct zfcp_port *port)
{
struct zfcp_fc_els_adisc *adisc;
struct zfcp_adapter *adapter = port->adapter;
int ret;
adisc = kmem_cache_zalloc(zfcp_data.adisc_cache, GFP_ATOMIC);
if (!adisc)
return -ENOMEM;
adisc->els.port = port;
adisc->els.req = &adisc->req;
adisc->els.resp = &adisc->resp;
sg_init_one(adisc->els.req, &adisc->adisc_req,
sizeof(struct fc_els_adisc));
sg_init_one(adisc->els.resp, &adisc->adisc_resp,
sizeof(struct fc_els_adisc));
adisc->els.handler = zfcp_fc_adisc_handler;
adisc->els.handler_data = adisc;
/* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports
without FC-AL-2 capability, so we don't set it */
adisc->adisc_req.adisc_wwpn = fc_host_port_name(adapter->scsi_host);
adisc->adisc_req.adisc_wwnn = fc_host_node_name(adapter->scsi_host);
adisc->adisc_req.adisc_cmd = ELS_ADISC;
hton24(adisc->adisc_req.adisc_port_id,
fc_host_port_id(adapter->scsi_host));
ret = zfcp_fsf_send_els(adapter, port->d_id, &adisc->els,
ZFCP_FC_CTELS_TMO);
if (ret)
kmem_cache_free(zfcp_data.adisc_cache, adisc);
return ret;
}
void zfcp_fc_link_test_work(struct work_struct *work)
{
struct zfcp_port *port =
container_of(work, struct zfcp_port, test_link_work);
int retval;
get_device(&port->dev);
port->rport_task = RPORT_DEL;
zfcp_scsi_rport_work(&port->rport_work);
/* only issue one test command at one time per port */
if (atomic_read(&port->status) & ZFCP_STATUS_PORT_LINK_TEST)
goto out;
atomic_set_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
retval = zfcp_fc_adisc(port);
if (retval == 0)
return;
/* send of ADISC was not possible */
atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
zfcp_erp_port_forced_reopen(port, 0, "fcltwk1");
out:
put_device(&port->dev);
}
/**
* zfcp_fc_test_link - lightweight link test procedure
* @port: port to be tested
*
* Test status of a link to a remote port using the ELS command ADISC.
* If there is a problem with the remote port, error recovery steps
* will be triggered.
*/
void zfcp_fc_test_link(struct zfcp_port *port)
{
get_device(&port->dev);
if (!queue_work(port->adapter->work_queue, &port->test_link_work))
put_device(&port->dev);
}
static void zfcp_free_sg_env(struct zfcp_fc_gpn_ft *gpn_ft, int buf_num)
{
struct scatterlist *sg = &gpn_ft->sg_req;
kmem_cache_free(zfcp_data.gpn_ft_cache, sg_virt(sg));
zfcp_sg_free_table(gpn_ft->sg_resp, buf_num);
kfree(gpn_ft);
}
static struct zfcp_fc_gpn_ft *zfcp_alloc_sg_env(int buf_num)
{
struct zfcp_fc_gpn_ft *gpn_ft;
struct zfcp_fc_gpn_ft_req *req;
gpn_ft = kzalloc(sizeof(*gpn_ft), GFP_KERNEL);
if (!gpn_ft)
return NULL;
req = kmem_cache_zalloc(zfcp_data.gpn_ft_cache, GFP_KERNEL);
if (!req) {
kfree(gpn_ft);
gpn_ft = NULL;
goto out;
}
sg_init_one(&gpn_ft->sg_req, req, sizeof(*req));
if (zfcp_sg_setup_table(gpn_ft->sg_resp, buf_num)) {
zfcp_free_sg_env(gpn_ft, buf_num);
gpn_ft = NULL;
}
out:
return gpn_ft;
}
static int zfcp_fc_send_gpn_ft(struct zfcp_fc_gpn_ft *gpn_ft,
struct zfcp_adapter *adapter, int max_bytes)
{
struct zfcp_fsf_ct_els *ct = &gpn_ft->ct;
struct zfcp_fc_gpn_ft_req *req = sg_virt(&gpn_ft->sg_req);
DECLARE_COMPLETION_ONSTACK(completion);
int ret;
/* prepare CT IU for GPN_FT */
req->ct_hdr.ct_rev = FC_CT_REV;
req->ct_hdr.ct_fs_type = FC_FST_DIR;
req->ct_hdr.ct_fs_subtype = FC_NS_SUBTYPE;
req->ct_hdr.ct_options = 0;
req->ct_hdr.ct_cmd = FC_NS_GPN_FT;
req->ct_hdr.ct_mr_size = max_bytes / 4;
req->gpn_ft.fn_domain_id_scope = 0;
req->gpn_ft.fn_area_id_scope = 0;
req->gpn_ft.fn_fc4_type = FC_TYPE_FCP;
/* prepare zfcp_send_ct */
ct->handler = zfcp_fc_complete;
ct->handler_data = &completion;
ct->req = &gpn_ft->sg_req;
ct->resp = gpn_ft->sg_resp;
ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct, NULL,
ZFCP_FC_CTELS_TMO);
if (!ret)
wait_for_completion(&completion);
return ret;
}
static void zfcp_fc_validate_port(struct zfcp_port *port, struct list_head *lh)
{
if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC))
return;
atomic_clear_mask(ZFCP_STATUS_COMMON_NOESC, &port->status);
if ((port->supported_classes != 0) ||
!list_empty(&port->unit_list))
return;
list_move_tail(&port->list, lh);
}
static int zfcp_fc_eval_gpn_ft(struct zfcp_fc_gpn_ft *gpn_ft,
struct zfcp_adapter *adapter, int max_entries)
{
struct zfcp_fsf_ct_els *ct = &gpn_ft->ct;
struct scatterlist *sg = gpn_ft->sg_resp;
struct fc_ct_hdr *hdr = sg_virt(sg);
struct fc_gpn_ft_resp *acc = sg_virt(sg);
struct zfcp_port *port, *tmp;
unsigned long flags;
LIST_HEAD(remove_lh);
u32 d_id;
int ret = 0, x, last = 0;
if (ct->status)
return -EIO;
if (hdr->ct_cmd != FC_FS_ACC) {
if (hdr->ct_reason == FC_BA_RJT_UNABLE)
return -EAGAIN; /* might be a temporary condition */
return -EIO;
}
if (hdr->ct_mr_size) {
dev_warn(&adapter->ccw_device->dev,
"The name server reported %d words residual data\n",
hdr->ct_mr_size);
return -E2BIG;
}
/* first entry is the header */
for (x = 1; x < max_entries && !last; x++) {
if (x % (ZFCP_FC_GPN_FT_ENT_PAGE + 1))
acc++;
else
acc = sg_virt(++sg);
last = acc->fp_flags & FC_NS_FID_LAST;
d_id = ntoh24(acc->fp_fid);
/* don't attach ports with a well known address */
if (d_id >= FC_FID_WELL_KNOWN_BASE)
continue;
/* skip the adapter's port and known remote ports */
if (acc->fp_wwpn == fc_host_port_name(adapter->scsi_host))
continue;
port = zfcp_port_enqueue(adapter, acc->fp_wwpn,
ZFCP_STATUS_COMMON_NOESC, d_id);
if (!IS_ERR(port))
zfcp_erp_port_reopen(port, 0, "fcegpf1");
else if (PTR_ERR(port) != -EEXIST)
ret = PTR_ERR(port);
}
zfcp_erp_wait(adapter);
write_lock_irqsave(&adapter->port_list_lock, flags);
list_for_each_entry_safe(port, tmp, &adapter->port_list, list)
zfcp_fc_validate_port(port, &remove_lh);
write_unlock_irqrestore(&adapter->port_list_lock, flags);
list_for_each_entry_safe(port, tmp, &remove_lh, list) {
zfcp_erp_port_shutdown(port, 0, "fcegpf2");
zfcp_device_unregister(&port->dev, &zfcp_sysfs_port_attrs);
}
return ret;
}
/**
* zfcp_fc_scan_ports - scan remote ports and attach new ports
* @work: reference to scheduled work
*/
void zfcp_fc_scan_ports(struct work_struct *work)
{
struct zfcp_adapter *adapter = container_of(work, struct zfcp_adapter,
scan_work);
int ret, i;
struct zfcp_fc_gpn_ft *gpn_ft;
int chain, max_entries, buf_num, max_bytes;
chain = adapter->adapter_features & FSF_FEATURE_ELS_CT_CHAINED_SBALS;
buf_num = chain ? ZFCP_FC_GPN_FT_NUM_BUFS : 1;
max_entries = chain ? ZFCP_FC_GPN_FT_MAX_ENT : ZFCP_FC_GPN_FT_ENT_PAGE;
max_bytes = chain ? ZFCP_FC_GPN_FT_MAX_SIZE : ZFCP_FC_CT_SIZE_PAGE;
if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT &&
fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV)
return;
if (zfcp_fc_wka_port_get(&adapter->gs->ds))
return;
gpn_ft = zfcp_alloc_sg_env(buf_num);
if (!gpn_ft)
goto out;
for (i = 0; i < 3; i++) {
ret = zfcp_fc_send_gpn_ft(gpn_ft, adapter, max_bytes);
if (!ret) {
ret = zfcp_fc_eval_gpn_ft(gpn_ft, adapter, max_entries);
if (ret == -EAGAIN)
ssleep(1);
else
break;
}
}
zfcp_free_sg_env(gpn_ft, buf_num);
out:
zfcp_fc_wka_port_put(&adapter->gs->ds);
}
static void zfcp_fc_ct_els_job_handler(void *data)
{
struct fc_bsg_job *job = data;
struct zfcp_fsf_ct_els *zfcp_ct_els = job->dd_data;
struct fc_bsg_reply *jr = job->reply;
jr->reply_payload_rcv_len = job->reply_payload.payload_len;
jr->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK;
jr->result = zfcp_ct_els->status ? -EIO : 0;
job->job_done(job);
}
static struct zfcp_fc_wka_port *zfcp_fc_job_wka_port(struct fc_bsg_job *job)
{
u32 preamble_word1;
u8 gs_type;
struct zfcp_adapter *adapter;
preamble_word1 = job->request->rqst_data.r_ct.preamble_word1;
gs_type = (preamble_word1 & 0xff000000) >> 24;
adapter = (struct zfcp_adapter *) job->shost->hostdata[0];
switch (gs_type) {
case FC_FST_ALIAS:
return &adapter->gs->as;
case FC_FST_MGMT:
return &adapter->gs->ms;
case FC_FST_TIME:
return &adapter->gs->ts;
break;
case FC_FST_DIR:
return &adapter->gs->ds;
break;
default:
return NULL;
}
}
static void zfcp_fc_ct_job_handler(void *data)
{
struct fc_bsg_job *job = data;
struct zfcp_fc_wka_port *wka_port;
wka_port = zfcp_fc_job_wka_port(job);
zfcp_fc_wka_port_put(wka_port);
zfcp_fc_ct_els_job_handler(data);
}
static int zfcp_fc_exec_els_job(struct fc_bsg_job *job,
struct zfcp_adapter *adapter)
{
struct zfcp_fsf_ct_els *els = job->dd_data;
struct fc_rport *rport = job->rport;
struct zfcp_port *port;
u32 d_id;
if (rport) {
port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
if (!port)
return -EINVAL;
d_id = port->d_id;
put_device(&port->dev);
} else
d_id = ntoh24(job->request->rqst_data.h_els.port_id);
els->handler = zfcp_fc_ct_els_job_handler;
return zfcp_fsf_send_els(adapter, d_id, els, job->req->timeout / HZ);
}
static int zfcp_fc_exec_ct_job(struct fc_bsg_job *job,
struct zfcp_adapter *adapter)
{
int ret;
struct zfcp_fsf_ct_els *ct = job->dd_data;
struct zfcp_fc_wka_port *wka_port;
wka_port = zfcp_fc_job_wka_port(job);
if (!wka_port)
return -EINVAL;
ret = zfcp_fc_wka_port_get(wka_port);
if (ret)
return ret;
ct->handler = zfcp_fc_ct_job_handler;
ret = zfcp_fsf_send_ct(wka_port, ct, NULL, job->req->timeout / HZ);
if (ret)
zfcp_fc_wka_port_put(wka_port);
return ret;
}
int zfcp_fc_exec_bsg_job(struct fc_bsg_job *job)
{
struct Scsi_Host *shost;
struct zfcp_adapter *adapter;
struct zfcp_fsf_ct_els *ct_els = job->dd_data;
shost = job->rport ? rport_to_shost(job->rport) : job->shost;
adapter = (struct zfcp_adapter *)shost->hostdata[0];
if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN))
return -EINVAL;
ct_els->req = job->request_payload.sg_list;
ct_els->resp = job->reply_payload.sg_list;
ct_els->handler_data = job;
switch (job->request->msgcode) {
case FC_BSG_RPT_ELS:
case FC_BSG_HST_ELS_NOLOGIN:
return zfcp_fc_exec_els_job(job, adapter);
case FC_BSG_RPT_CT:
case FC_BSG_HST_CT:
return zfcp_fc_exec_ct_job(job, adapter);
default:
return -EINVAL;
}
}
int zfcp_fc_timeout_bsg_job(struct fc_bsg_job *job)
{
/* hardware tracks timeout, reset bsg timeout to not interfere */
return -EAGAIN;
}
int zfcp_fc_gs_setup(struct zfcp_adapter *adapter)
{
struct zfcp_fc_wka_ports *wka_ports;
wka_ports = kzalloc(sizeof(struct zfcp_fc_wka_ports), GFP_KERNEL);
if (!wka_ports)
return -ENOMEM;
adapter->gs = wka_ports;
zfcp_fc_wka_port_init(&wka_ports->ms, FC_FID_MGMT_SERV, adapter);
zfcp_fc_wka_port_init(&wka_ports->ts, FC_FID_TIME_SERV, adapter);
zfcp_fc_wka_port_init(&wka_ports->ds, FC_FID_DIR_SERV, adapter);
zfcp_fc_wka_port_init(&wka_ports->as, FC_FID_ALIASES, adapter);
return 0;
}
void zfcp_fc_gs_destroy(struct zfcp_adapter *adapter)
{
kfree(adapter->gs);
adapter->gs = NULL;
}