mirror of https://gitee.com/openkylin/linux.git
1038 lines
28 KiB
C
1038 lines
28 KiB
C
/*
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* zfcp device driver
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*
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* Fibre Channel related functions for the zfcp device driver.
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*
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* Copyright IBM Corp. 2008, 2010
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*/
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#define KMSG_COMPONENT "zfcp"
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/utsname.h>
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#include <linux/random.h>
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#include <scsi/fc/fc_els.h>
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#include <scsi/libfc.h>
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#include "zfcp_ext.h"
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#include "zfcp_fc.h"
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struct kmem_cache *zfcp_fc_req_cache;
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static u32 zfcp_fc_rscn_range_mask[] = {
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[ELS_ADDR_FMT_PORT] = 0xFFFFFF,
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[ELS_ADDR_FMT_AREA] = 0xFFFF00,
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[ELS_ADDR_FMT_DOM] = 0xFF0000,
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[ELS_ADDR_FMT_FAB] = 0x000000,
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};
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static bool no_auto_port_rescan;
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module_param_named(no_auto_port_rescan, no_auto_port_rescan, bool, 0600);
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MODULE_PARM_DESC(no_auto_port_rescan,
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"no automatic port_rescan (default off)");
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static unsigned int port_scan_backoff = 500;
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module_param(port_scan_backoff, uint, 0600);
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MODULE_PARM_DESC(port_scan_backoff,
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"upper limit of port scan random backoff in msecs (default 500)");
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static unsigned int port_scan_ratelimit = 60000;
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module_param(port_scan_ratelimit, uint, 0600);
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MODULE_PARM_DESC(port_scan_ratelimit,
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"minimum interval between port scans in msecs (default 60000)");
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unsigned int zfcp_fc_port_scan_backoff(void)
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{
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if (!port_scan_backoff)
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return 0;
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return get_random_int() % port_scan_backoff;
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}
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static void zfcp_fc_port_scan_time(struct zfcp_adapter *adapter)
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{
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unsigned long interval = msecs_to_jiffies(port_scan_ratelimit);
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unsigned long backoff = msecs_to_jiffies(zfcp_fc_port_scan_backoff());
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adapter->next_port_scan = jiffies + interval + backoff;
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}
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static void zfcp_fc_port_scan(struct zfcp_adapter *adapter)
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{
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unsigned long now = jiffies;
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unsigned long next = adapter->next_port_scan;
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unsigned long delay = 0, max;
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/* delay only needed within waiting period */
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if (time_before(now, next)) {
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delay = next - now;
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/* paranoia: never ever delay scans longer than specified */
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max = msecs_to_jiffies(port_scan_ratelimit + port_scan_backoff);
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delay = min(delay, max);
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}
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queue_delayed_work(adapter->work_queue, &adapter->scan_work, delay);
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}
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void zfcp_fc_conditional_port_scan(struct zfcp_adapter *adapter)
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{
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if (no_auto_port_rescan)
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return;
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zfcp_fc_port_scan(adapter);
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}
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void zfcp_fc_inverse_conditional_port_scan(struct zfcp_adapter *adapter)
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{
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if (!no_auto_port_rescan)
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return;
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zfcp_fc_port_scan(adapter);
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}
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/**
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* zfcp_fc_post_event - post event to userspace via fc_transport
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* @work: work struct with enqueued events
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*/
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void zfcp_fc_post_event(struct work_struct *work)
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{
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struct zfcp_fc_event *event = NULL, *tmp = NULL;
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LIST_HEAD(tmp_lh);
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struct zfcp_fc_events *events = container_of(work,
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struct zfcp_fc_events, work);
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struct zfcp_adapter *adapter = container_of(events, struct zfcp_adapter,
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events);
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spin_lock_bh(&events->list_lock);
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list_splice_init(&events->list, &tmp_lh);
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spin_unlock_bh(&events->list_lock);
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list_for_each_entry_safe(event, tmp, &tmp_lh, list) {
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fc_host_post_event(adapter->scsi_host, fc_get_event_number(),
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event->code, event->data);
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list_del(&event->list);
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kfree(event);
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}
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}
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/**
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* zfcp_fc_enqueue_event - safely enqueue FC HBA API event from irq context
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* @adapter: The adapter where to enqueue the event
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* @event_code: The event code (as defined in fc_host_event_code in
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* scsi_transport_fc.h)
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* @event_data: The event data (e.g. n_port page in case of els)
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*/
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void zfcp_fc_enqueue_event(struct zfcp_adapter *adapter,
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enum fc_host_event_code event_code, u32 event_data)
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{
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struct zfcp_fc_event *event;
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event = kmalloc(sizeof(struct zfcp_fc_event), GFP_ATOMIC);
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if (!event)
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return;
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event->code = event_code;
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event->data = event_data;
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spin_lock(&adapter->events.list_lock);
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list_add_tail(&event->list, &adapter->events.list);
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spin_unlock(&adapter->events.list_lock);
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queue_work(adapter->work_queue, &adapter->events.work);
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}
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static int zfcp_fc_wka_port_get(struct zfcp_fc_wka_port *wka_port)
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{
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if (mutex_lock_interruptible(&wka_port->mutex))
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return -ERESTARTSYS;
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if (wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE ||
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wka_port->status == ZFCP_FC_WKA_PORT_CLOSING) {
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wka_port->status = ZFCP_FC_WKA_PORT_OPENING;
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if (zfcp_fsf_open_wka_port(wka_port))
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wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
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}
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mutex_unlock(&wka_port->mutex);
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wait_event(wka_port->completion_wq,
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wka_port->status == ZFCP_FC_WKA_PORT_ONLINE ||
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wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE);
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if (wka_port->status == ZFCP_FC_WKA_PORT_ONLINE) {
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atomic_inc(&wka_port->refcount);
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return 0;
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}
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return -EIO;
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}
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static void zfcp_fc_wka_port_offline(struct work_struct *work)
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{
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struct delayed_work *dw = to_delayed_work(work);
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struct zfcp_fc_wka_port *wka_port =
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container_of(dw, struct zfcp_fc_wka_port, work);
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mutex_lock(&wka_port->mutex);
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if ((atomic_read(&wka_port->refcount) != 0) ||
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(wka_port->status != ZFCP_FC_WKA_PORT_ONLINE))
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goto out;
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wka_port->status = ZFCP_FC_WKA_PORT_CLOSING;
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if (zfcp_fsf_close_wka_port(wka_port)) {
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wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
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wake_up(&wka_port->completion_wq);
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}
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out:
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mutex_unlock(&wka_port->mutex);
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}
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static void zfcp_fc_wka_port_put(struct zfcp_fc_wka_port *wka_port)
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{
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if (atomic_dec_return(&wka_port->refcount) != 0)
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return;
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/* wait 10 milliseconds, other reqs might pop in */
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schedule_delayed_work(&wka_port->work, HZ / 100);
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}
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static void zfcp_fc_wka_port_init(struct zfcp_fc_wka_port *wka_port, u32 d_id,
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struct zfcp_adapter *adapter)
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{
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init_waitqueue_head(&wka_port->completion_wq);
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wka_port->adapter = adapter;
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wka_port->d_id = d_id;
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wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
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atomic_set(&wka_port->refcount, 0);
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mutex_init(&wka_port->mutex);
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INIT_DELAYED_WORK(&wka_port->work, zfcp_fc_wka_port_offline);
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}
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static void zfcp_fc_wka_port_force_offline(struct zfcp_fc_wka_port *wka)
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{
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cancel_delayed_work_sync(&wka->work);
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mutex_lock(&wka->mutex);
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wka->status = ZFCP_FC_WKA_PORT_OFFLINE;
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mutex_unlock(&wka->mutex);
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}
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void zfcp_fc_wka_ports_force_offline(struct zfcp_fc_wka_ports *gs)
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{
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if (!gs)
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return;
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zfcp_fc_wka_port_force_offline(&gs->ms);
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zfcp_fc_wka_port_force_offline(&gs->ts);
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zfcp_fc_wka_port_force_offline(&gs->ds);
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zfcp_fc_wka_port_force_offline(&gs->as);
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}
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static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range,
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struct fc_els_rscn_page *page)
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{
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unsigned long flags;
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struct zfcp_adapter *adapter = fsf_req->adapter;
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struct zfcp_port *port;
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read_lock_irqsave(&adapter->port_list_lock, flags);
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list_for_each_entry(port, &adapter->port_list, list) {
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if ((port->d_id & range) == (ntoh24(page->rscn_fid) & range))
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zfcp_fc_test_link(port);
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if (!port->d_id)
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zfcp_erp_port_reopen(port,
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ZFCP_STATUS_COMMON_ERP_FAILED,
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"fcrscn1");
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}
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read_unlock_irqrestore(&adapter->port_list_lock, flags);
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}
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static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req)
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{
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struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data;
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struct fc_els_rscn *head;
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struct fc_els_rscn_page *page;
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u16 i;
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u16 no_entries;
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unsigned int afmt;
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head = (struct fc_els_rscn *) status_buffer->payload.data;
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page = (struct fc_els_rscn_page *) head;
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/* see FC-FS */
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no_entries = head->rscn_plen / sizeof(struct fc_els_rscn_page);
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for (i = 1; i < no_entries; i++) {
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/* skip head and start with 1st element */
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page++;
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afmt = page->rscn_page_flags & ELS_RSCN_ADDR_FMT_MASK;
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_zfcp_fc_incoming_rscn(fsf_req, zfcp_fc_rscn_range_mask[afmt],
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page);
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zfcp_fc_enqueue_event(fsf_req->adapter, FCH_EVT_RSCN,
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*(u32 *)page);
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}
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zfcp_fc_conditional_port_scan(fsf_req->adapter);
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}
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static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, u64 wwpn)
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{
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unsigned long flags;
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struct zfcp_adapter *adapter = req->adapter;
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struct zfcp_port *port;
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read_lock_irqsave(&adapter->port_list_lock, flags);
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list_for_each_entry(port, &adapter->port_list, list)
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if (port->wwpn == wwpn) {
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zfcp_erp_port_forced_reopen(port, 0, "fciwwp1");
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break;
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}
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read_unlock_irqrestore(&adapter->port_list_lock, flags);
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}
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static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req)
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{
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struct fsf_status_read_buffer *status_buffer;
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struct fc_els_flogi *plogi;
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status_buffer = (struct fsf_status_read_buffer *) req->data;
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plogi = (struct fc_els_flogi *) status_buffer->payload.data;
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zfcp_fc_incoming_wwpn(req, plogi->fl_wwpn);
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}
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static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req)
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{
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struct fsf_status_read_buffer *status_buffer =
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(struct fsf_status_read_buffer *)req->data;
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struct fc_els_logo *logo =
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(struct fc_els_logo *) status_buffer->payload.data;
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zfcp_fc_incoming_wwpn(req, logo->fl_n_port_wwn);
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}
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/**
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* zfcp_fc_incoming_els - handle incoming ELS
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* @fsf_req - request which contains incoming ELS
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*/
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void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req)
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{
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struct fsf_status_read_buffer *status_buffer =
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(struct fsf_status_read_buffer *) fsf_req->data;
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unsigned int els_type = status_buffer->payload.data[0];
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zfcp_dbf_san_in_els("fciels1", fsf_req);
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if (els_type == ELS_PLOGI)
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zfcp_fc_incoming_plogi(fsf_req);
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else if (els_type == ELS_LOGO)
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zfcp_fc_incoming_logo(fsf_req);
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else if (els_type == ELS_RSCN)
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zfcp_fc_incoming_rscn(fsf_req);
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}
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static void zfcp_fc_ns_gid_pn_eval(struct zfcp_fc_req *fc_req)
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{
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struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
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struct zfcp_fc_gid_pn_rsp *gid_pn_rsp = &fc_req->u.gid_pn.rsp;
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if (ct_els->status)
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return;
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if (gid_pn_rsp->ct_hdr.ct_cmd != FC_FS_ACC)
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return;
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/* looks like a valid d_id */
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ct_els->port->d_id = ntoh24(gid_pn_rsp->gid_pn.fp_fid);
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}
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static void zfcp_fc_complete(void *data)
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{
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complete(data);
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}
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static void zfcp_fc_ct_ns_init(struct fc_ct_hdr *ct_hdr, u16 cmd, u16 mr_size)
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{
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ct_hdr->ct_rev = FC_CT_REV;
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ct_hdr->ct_fs_type = FC_FST_DIR;
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ct_hdr->ct_fs_subtype = FC_NS_SUBTYPE;
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ct_hdr->ct_cmd = cmd;
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ct_hdr->ct_mr_size = mr_size / 4;
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}
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static int zfcp_fc_ns_gid_pn_request(struct zfcp_port *port,
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struct zfcp_fc_req *fc_req)
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{
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struct zfcp_adapter *adapter = port->adapter;
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DECLARE_COMPLETION_ONSTACK(completion);
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struct zfcp_fc_gid_pn_req *gid_pn_req = &fc_req->u.gid_pn.req;
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struct zfcp_fc_gid_pn_rsp *gid_pn_rsp = &fc_req->u.gid_pn.rsp;
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int ret;
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/* setup parameters for send generic command */
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fc_req->ct_els.port = port;
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fc_req->ct_els.handler = zfcp_fc_complete;
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fc_req->ct_els.handler_data = &completion;
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fc_req->ct_els.req = &fc_req->sg_req;
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fc_req->ct_els.resp = &fc_req->sg_rsp;
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sg_init_one(&fc_req->sg_req, gid_pn_req, sizeof(*gid_pn_req));
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sg_init_one(&fc_req->sg_rsp, gid_pn_rsp, sizeof(*gid_pn_rsp));
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zfcp_fc_ct_ns_init(&gid_pn_req->ct_hdr,
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FC_NS_GID_PN, ZFCP_FC_CT_SIZE_PAGE);
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gid_pn_req->gid_pn.fn_wwpn = port->wwpn;
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ret = zfcp_fsf_send_ct(&adapter->gs->ds, &fc_req->ct_els,
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adapter->pool.gid_pn_req,
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ZFCP_FC_CTELS_TMO);
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if (!ret) {
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wait_for_completion(&completion);
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zfcp_fc_ns_gid_pn_eval(fc_req);
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}
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return ret;
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}
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/**
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* zfcp_fc_ns_gid_pn - initiate GID_PN nameserver request
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* @port: port where GID_PN request is needed
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* return: -ENOMEM on error, 0 otherwise
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*/
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static int zfcp_fc_ns_gid_pn(struct zfcp_port *port)
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{
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int ret;
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struct zfcp_fc_req *fc_req;
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struct zfcp_adapter *adapter = port->adapter;
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fc_req = mempool_alloc(adapter->pool.gid_pn, GFP_ATOMIC);
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if (!fc_req)
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return -ENOMEM;
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memset(fc_req, 0, sizeof(*fc_req));
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ret = zfcp_fc_wka_port_get(&adapter->gs->ds);
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if (ret)
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goto out;
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ret = zfcp_fc_ns_gid_pn_request(port, fc_req);
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zfcp_fc_wka_port_put(&adapter->gs->ds);
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out:
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mempool_free(fc_req, adapter->pool.gid_pn);
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return ret;
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}
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void zfcp_fc_port_did_lookup(struct work_struct *work)
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{
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int ret;
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struct zfcp_port *port = container_of(work, struct zfcp_port,
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gid_pn_work);
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ret = zfcp_fc_ns_gid_pn(port);
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if (ret) {
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/* could not issue gid_pn for some reason */
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zfcp_erp_adapter_reopen(port->adapter, 0, "fcgpn_1");
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goto out;
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}
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if (!port->d_id) {
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zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ERP_FAILED);
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goto out;
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}
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zfcp_erp_port_reopen(port, 0, "fcgpn_3");
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out:
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put_device(&port->dev);
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}
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/**
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* zfcp_fc_trigger_did_lookup - trigger the d_id lookup using a GID_PN request
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* @port: The zfcp_port to lookup the d_id for.
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*/
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void zfcp_fc_trigger_did_lookup(struct zfcp_port *port)
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{
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get_device(&port->dev);
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if (!queue_work(port->adapter->work_queue, &port->gid_pn_work))
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put_device(&port->dev);
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}
|
|
|
|
/**
|
|
* 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_req *fc_req = data;
|
|
struct zfcp_port *port = fc_req->ct_els.port;
|
|
struct fc_els_adisc *adisc_resp = &fc_req->u.adisc.rsp;
|
|
|
|
if (fc_req->ct_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_andnot(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
|
|
put_device(&port->dev);
|
|
kmem_cache_free(zfcp_fc_req_cache, fc_req);
|
|
}
|
|
|
|
static int zfcp_fc_adisc(struct zfcp_port *port)
|
|
{
|
|
struct zfcp_fc_req *fc_req;
|
|
struct zfcp_adapter *adapter = port->adapter;
|
|
struct Scsi_Host *shost = adapter->scsi_host;
|
|
int ret;
|
|
|
|
fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_ATOMIC);
|
|
if (!fc_req)
|
|
return -ENOMEM;
|
|
|
|
fc_req->ct_els.port = port;
|
|
fc_req->ct_els.req = &fc_req->sg_req;
|
|
fc_req->ct_els.resp = &fc_req->sg_rsp;
|
|
sg_init_one(&fc_req->sg_req, &fc_req->u.adisc.req,
|
|
sizeof(struct fc_els_adisc));
|
|
sg_init_one(&fc_req->sg_rsp, &fc_req->u.adisc.rsp,
|
|
sizeof(struct fc_els_adisc));
|
|
|
|
fc_req->ct_els.handler = zfcp_fc_adisc_handler;
|
|
fc_req->ct_els.handler_data = fc_req;
|
|
|
|
/* 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 */
|
|
fc_req->u.adisc.req.adisc_wwpn = fc_host_port_name(shost);
|
|
fc_req->u.adisc.req.adisc_wwnn = fc_host_node_name(shost);
|
|
fc_req->u.adisc.req.adisc_cmd = ELS_ADISC;
|
|
hton24(fc_req->u.adisc.req.adisc_port_id, fc_host_port_id(shost));
|
|
|
|
ret = zfcp_fsf_send_els(adapter, port->d_id, &fc_req->ct_els,
|
|
ZFCP_FC_CTELS_TMO);
|
|
if (ret)
|
|
kmem_cache_free(zfcp_fc_req_cache, fc_req);
|
|
|
|
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_or(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
|
|
|
|
retval = zfcp_fc_adisc(port);
|
|
if (retval == 0)
|
|
return;
|
|
|
|
/* send of ADISC was not possible */
|
|
atomic_andnot(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 struct zfcp_fc_req *zfcp_alloc_sg_env(int buf_num)
|
|
{
|
|
struct zfcp_fc_req *fc_req;
|
|
|
|
fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_KERNEL);
|
|
if (!fc_req)
|
|
return NULL;
|
|
|
|
if (zfcp_sg_setup_table(&fc_req->sg_rsp, buf_num)) {
|
|
kmem_cache_free(zfcp_fc_req_cache, fc_req);
|
|
return NULL;
|
|
}
|
|
|
|
sg_init_one(&fc_req->sg_req, &fc_req->u.gpn_ft.req,
|
|
sizeof(struct zfcp_fc_gpn_ft_req));
|
|
|
|
return fc_req;
|
|
}
|
|
|
|
static int zfcp_fc_send_gpn_ft(struct zfcp_fc_req *fc_req,
|
|
struct zfcp_adapter *adapter, int max_bytes)
|
|
{
|
|
struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
|
|
struct zfcp_fc_gpn_ft_req *req = &fc_req->u.gpn_ft.req;
|
|
DECLARE_COMPLETION_ONSTACK(completion);
|
|
int ret;
|
|
|
|
zfcp_fc_ct_ns_init(&req->ct_hdr, FC_NS_GPN_FT, max_bytes);
|
|
req->gpn_ft.fn_fc4_type = FC_TYPE_FCP;
|
|
|
|
ct_els->handler = zfcp_fc_complete;
|
|
ct_els->handler_data = &completion;
|
|
ct_els->req = &fc_req->sg_req;
|
|
ct_els->resp = &fc_req->sg_rsp;
|
|
|
|
ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, 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_andnot(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_req *fc_req,
|
|
struct zfcp_adapter *adapter, int max_entries)
|
|
{
|
|
struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
|
|
struct scatterlist *sg = &fc_req->sg_rsp;
|
|
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_els->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");
|
|
device_unregister(&port->dev);
|
|
}
|
|
|
|
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 delayed_work *dw = to_delayed_work(work);
|
|
struct zfcp_adapter *adapter = container_of(dw, struct zfcp_adapter,
|
|
scan_work);
|
|
int ret, i;
|
|
struct zfcp_fc_req *fc_req;
|
|
int chain, max_entries, buf_num, max_bytes;
|
|
|
|
zfcp_fc_port_scan_time(adapter);
|
|
|
|
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;
|
|
|
|
fc_req = zfcp_alloc_sg_env(buf_num);
|
|
if (!fc_req)
|
|
goto out;
|
|
|
|
for (i = 0; i < 3; i++) {
|
|
ret = zfcp_fc_send_gpn_ft(fc_req, adapter, max_bytes);
|
|
if (!ret) {
|
|
ret = zfcp_fc_eval_gpn_ft(fc_req, adapter, max_entries);
|
|
if (ret == -EAGAIN)
|
|
ssleep(1);
|
|
else
|
|
break;
|
|
}
|
|
}
|
|
zfcp_sg_free_table(&fc_req->sg_rsp, buf_num);
|
|
kmem_cache_free(zfcp_fc_req_cache, fc_req);
|
|
out:
|
|
zfcp_fc_wka_port_put(&adapter->gs->ds);
|
|
}
|
|
|
|
static int zfcp_fc_gspn(struct zfcp_adapter *adapter,
|
|
struct zfcp_fc_req *fc_req)
|
|
{
|
|
DECLARE_COMPLETION_ONSTACK(completion);
|
|
char devno[] = "DEVNO:";
|
|
struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
|
|
struct zfcp_fc_gspn_req *gspn_req = &fc_req->u.gspn.req;
|
|
struct zfcp_fc_gspn_rsp *gspn_rsp = &fc_req->u.gspn.rsp;
|
|
int ret;
|
|
|
|
zfcp_fc_ct_ns_init(&gspn_req->ct_hdr, FC_NS_GSPN_ID,
|
|
FC_SYMBOLIC_NAME_SIZE);
|
|
hton24(gspn_req->gspn.fp_fid, fc_host_port_id(adapter->scsi_host));
|
|
|
|
sg_init_one(&fc_req->sg_req, gspn_req, sizeof(*gspn_req));
|
|
sg_init_one(&fc_req->sg_rsp, gspn_rsp, sizeof(*gspn_rsp));
|
|
|
|
ct_els->handler = zfcp_fc_complete;
|
|
ct_els->handler_data = &completion;
|
|
ct_els->req = &fc_req->sg_req;
|
|
ct_els->resp = &fc_req->sg_rsp;
|
|
|
|
ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL,
|
|
ZFCP_FC_CTELS_TMO);
|
|
if (ret)
|
|
return ret;
|
|
|
|
wait_for_completion(&completion);
|
|
if (ct_els->status)
|
|
return ct_els->status;
|
|
|
|
if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_NPIV &&
|
|
!(strstr(gspn_rsp->gspn.fp_name, devno)))
|
|
snprintf(fc_host_symbolic_name(adapter->scsi_host),
|
|
FC_SYMBOLIC_NAME_SIZE, "%s%s %s NAME: %s",
|
|
gspn_rsp->gspn.fp_name, devno,
|
|
dev_name(&adapter->ccw_device->dev),
|
|
init_utsname()->nodename);
|
|
else
|
|
strlcpy(fc_host_symbolic_name(adapter->scsi_host),
|
|
gspn_rsp->gspn.fp_name, FC_SYMBOLIC_NAME_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void zfcp_fc_rspn(struct zfcp_adapter *adapter,
|
|
struct zfcp_fc_req *fc_req)
|
|
{
|
|
DECLARE_COMPLETION_ONSTACK(completion);
|
|
struct Scsi_Host *shost = adapter->scsi_host;
|
|
struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
|
|
struct zfcp_fc_rspn_req *rspn_req = &fc_req->u.rspn.req;
|
|
struct fc_ct_hdr *rspn_rsp = &fc_req->u.rspn.rsp;
|
|
int ret, len;
|
|
|
|
zfcp_fc_ct_ns_init(&rspn_req->ct_hdr, FC_NS_RSPN_ID,
|
|
FC_SYMBOLIC_NAME_SIZE);
|
|
hton24(rspn_req->rspn.fr_fid.fp_fid, fc_host_port_id(shost));
|
|
len = strlcpy(rspn_req->rspn.fr_name, fc_host_symbolic_name(shost),
|
|
FC_SYMBOLIC_NAME_SIZE);
|
|
rspn_req->rspn.fr_name_len = len;
|
|
|
|
sg_init_one(&fc_req->sg_req, rspn_req, sizeof(*rspn_req));
|
|
sg_init_one(&fc_req->sg_rsp, rspn_rsp, sizeof(*rspn_rsp));
|
|
|
|
ct_els->handler = zfcp_fc_complete;
|
|
ct_els->handler_data = &completion;
|
|
ct_els->req = &fc_req->sg_req;
|
|
ct_els->resp = &fc_req->sg_rsp;
|
|
|
|
ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL,
|
|
ZFCP_FC_CTELS_TMO);
|
|
if (!ret)
|
|
wait_for_completion(&completion);
|
|
}
|
|
|
|
/**
|
|
* zfcp_fc_sym_name_update - Retrieve and update the symbolic port name
|
|
* @work: ns_up_work of the adapter where to update the symbolic port name
|
|
*
|
|
* Retrieve the current symbolic port name that may have been set by
|
|
* the hardware using the GSPN request and update the fc_host
|
|
* symbolic_name sysfs attribute. When running in NPIV mode (and hence
|
|
* the port name is unique for this system), update the symbolic port
|
|
* name to add Linux specific information and update the FC nameserver
|
|
* using the RSPN request.
|
|
*/
|
|
void zfcp_fc_sym_name_update(struct work_struct *work)
|
|
{
|
|
struct zfcp_adapter *adapter = container_of(work, struct zfcp_adapter,
|
|
ns_up_work);
|
|
int ret;
|
|
struct zfcp_fc_req *fc_req;
|
|
|
|
if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT &&
|
|
fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV)
|
|
return;
|
|
|
|
fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_KERNEL);
|
|
if (!fc_req)
|
|
return;
|
|
|
|
ret = zfcp_fc_wka_port_get(&adapter->gs->ds);
|
|
if (ret)
|
|
goto out_free;
|
|
|
|
ret = zfcp_fc_gspn(adapter, fc_req);
|
|
if (ret || fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV)
|
|
goto out_ds_put;
|
|
|
|
memset(fc_req, 0, sizeof(*fc_req));
|
|
zfcp_fc_rspn(adapter, fc_req);
|
|
|
|
out_ds_put:
|
|
zfcp_fc_wka_port_put(&adapter->gs->ds);
|
|
out_free:
|
|
kmem_cache_free(zfcp_fc_req_cache, fc_req);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|