-/*
- * This file is part of the zfcp device driver for
- * FCP adapters for IBM System z9 and zSeries.
+/*
+ * zfcp device driver
+ *
+ * Error Recovery Procedures (ERP).
*
- * (C) Copyright IBM Corp. 2002, 2006
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * Copyright IBM Corporation 2002, 2010
*/
-#define ZFCP_LOG_AREA ZFCP_LOG_AREA_ERP
+#define KMSG_COMPONENT "zfcp"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#include <linux/kthread.h>
#include "zfcp_ext.h"
+#include "zfcp_reqlist.h"
+
+#define ZFCP_MAX_ERPS 3
+
+enum zfcp_erp_act_flags {
+ ZFCP_STATUS_ERP_TIMEDOUT = 0x10000000,
+ ZFCP_STATUS_ERP_CLOSE_ONLY = 0x01000000,
+ ZFCP_STATUS_ERP_DISMISSING = 0x00100000,
+ ZFCP_STATUS_ERP_DISMISSED = 0x00200000,
+ ZFCP_STATUS_ERP_LOWMEM = 0x00400000,
+};
+
+enum zfcp_erp_steps {
+ ZFCP_ERP_STEP_UNINITIALIZED = 0x0000,
+ ZFCP_ERP_STEP_FSF_XCONFIG = 0x0001,
+ ZFCP_ERP_STEP_PHYS_PORT_CLOSING = 0x0010,
+ ZFCP_ERP_STEP_PORT_CLOSING = 0x0100,
+ ZFCP_ERP_STEP_PORT_OPENING = 0x0800,
+ ZFCP_ERP_STEP_UNIT_CLOSING = 0x1000,
+ ZFCP_ERP_STEP_UNIT_OPENING = 0x2000,
+};
+
+enum zfcp_erp_act_type {
+ ZFCP_ERP_ACTION_REOPEN_UNIT = 1,
+ ZFCP_ERP_ACTION_REOPEN_PORT = 2,
+ ZFCP_ERP_ACTION_REOPEN_PORT_FORCED = 3,
+ ZFCP_ERP_ACTION_REOPEN_ADAPTER = 4,
+};
+
+enum zfcp_erp_act_state {
+ ZFCP_ERP_ACTION_RUNNING = 1,
+ ZFCP_ERP_ACTION_READY = 2,
+};
+
+enum zfcp_erp_act_result {
+ ZFCP_ERP_SUCCEEDED = 0,
+ ZFCP_ERP_FAILED = 1,
+ ZFCP_ERP_CONTINUES = 2,
+ ZFCP_ERP_EXIT = 3,
+ ZFCP_ERP_DISMISSED = 4,
+ ZFCP_ERP_NOMEM = 5,
+};
+
+static void zfcp_erp_adapter_block(struct zfcp_adapter *adapter, int mask)
+{
+ zfcp_erp_modify_adapter_status(adapter, "erablk1", NULL,
+ ZFCP_STATUS_COMMON_UNBLOCKED | mask,
+ ZFCP_CLEAR);
+}
+
+static int zfcp_erp_action_exists(struct zfcp_erp_action *act)
+{
+ struct zfcp_erp_action *curr_act;
+
+ list_for_each_entry(curr_act, &act->adapter->erp_running_head, list)
+ if (act == curr_act)
+ return ZFCP_ERP_ACTION_RUNNING;
+ return 0;
+}
-static int zfcp_erp_adisc(struct zfcp_port *);
-static void zfcp_erp_adisc_handler(unsigned long);
-
-static int zfcp_erp_adapter_reopen_internal(struct zfcp_adapter *, int);
-static int zfcp_erp_port_forced_reopen_internal(struct zfcp_port *, int);
-static int zfcp_erp_port_reopen_internal(struct zfcp_port *, int);
-static int zfcp_erp_unit_reopen_internal(struct zfcp_unit *, int);
-
-static int zfcp_erp_port_reopen_all_internal(struct zfcp_adapter *, int);
-static int zfcp_erp_unit_reopen_all_internal(struct zfcp_port *, int);
-
-static void zfcp_erp_adapter_block(struct zfcp_adapter *, int);
-static void zfcp_erp_adapter_unblock(struct zfcp_adapter *);
-static void zfcp_erp_port_block(struct zfcp_port *, int);
-static void zfcp_erp_port_unblock(struct zfcp_port *);
-static void zfcp_erp_unit_block(struct zfcp_unit *, int);
-static void zfcp_erp_unit_unblock(struct zfcp_unit *);
-
-static int zfcp_erp_thread(void *);
-
-static int zfcp_erp_strategy(struct zfcp_erp_action *);
-
-static int zfcp_erp_strategy_do_action(struct zfcp_erp_action *);
-static int zfcp_erp_strategy_memwait(struct zfcp_erp_action *);
-static int zfcp_erp_strategy_check_target(struct zfcp_erp_action *, int);
-static int zfcp_erp_strategy_check_unit(struct zfcp_unit *, int);
-static int zfcp_erp_strategy_check_port(struct zfcp_port *, int);
-static int zfcp_erp_strategy_check_adapter(struct zfcp_adapter *, int);
-static int zfcp_erp_strategy_statechange(int, u32, struct zfcp_adapter *,
- struct zfcp_port *,
- struct zfcp_unit *, int);
-static inline int zfcp_erp_strategy_statechange_detected(atomic_t *, u32);
-static int zfcp_erp_strategy_followup_actions(int, struct zfcp_adapter *,
- struct zfcp_port *,
- struct zfcp_unit *, int);
-static int zfcp_erp_strategy_check_queues(struct zfcp_adapter *);
-static int zfcp_erp_strategy_check_action(struct zfcp_erp_action *, int);
-
-static int zfcp_erp_adapter_strategy(struct zfcp_erp_action *);
-static int zfcp_erp_adapter_strategy_generic(struct zfcp_erp_action *, int);
-static int zfcp_erp_adapter_strategy_close(struct zfcp_erp_action *);
-static int zfcp_erp_adapter_strategy_close_qdio(struct zfcp_erp_action *);
-static int zfcp_erp_adapter_strategy_close_fsf(struct zfcp_erp_action *);
-static int zfcp_erp_adapter_strategy_open(struct zfcp_erp_action *);
-static int zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *);
-static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *);
-static int zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *);
-static int zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *);
-static int zfcp_erp_adapter_strategy_open_fsf_statusread(
- struct zfcp_erp_action *);
-
-static int zfcp_erp_port_forced_strategy(struct zfcp_erp_action *);
-static int zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *);
-
-static int zfcp_erp_port_strategy(struct zfcp_erp_action *);
-static int zfcp_erp_port_strategy_clearstati(struct zfcp_port *);
-static int zfcp_erp_port_strategy_close(struct zfcp_erp_action *);
-static int zfcp_erp_port_strategy_open(struct zfcp_erp_action *);
-static int zfcp_erp_port_strategy_open_nameserver(struct zfcp_erp_action *);
-static int zfcp_erp_port_strategy_open_nameserver_wakeup(
- struct zfcp_erp_action *);
-static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *);
-static int zfcp_erp_port_strategy_open_common_lookup(struct zfcp_erp_action *);
-static int zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *);
-
-static int zfcp_erp_unit_strategy(struct zfcp_erp_action *);
-static int zfcp_erp_unit_strategy_clearstati(struct zfcp_unit *);
-static int zfcp_erp_unit_strategy_close(struct zfcp_erp_action *);
-static int zfcp_erp_unit_strategy_open(struct zfcp_erp_action *);
-
-static int zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *);
-static int zfcp_erp_action_dismiss_port(struct zfcp_port *);
-static int zfcp_erp_action_dismiss_unit(struct zfcp_unit *);
-static int zfcp_erp_action_dismiss(struct zfcp_erp_action *);
-
-static int zfcp_erp_action_enqueue(int, struct zfcp_adapter *,
- struct zfcp_port *, struct zfcp_unit *);
-static int zfcp_erp_action_dequeue(struct zfcp_erp_action *);
-static void zfcp_erp_action_cleanup(int, struct zfcp_adapter *,
- struct zfcp_port *, struct zfcp_unit *,
- int);
-
-static void zfcp_erp_action_ready(struct zfcp_erp_action *);
-static int zfcp_erp_action_exists(struct zfcp_erp_action *);
-
-static inline void zfcp_erp_action_to_ready(struct zfcp_erp_action *);
-static inline void zfcp_erp_action_to_running(struct zfcp_erp_action *);
-
-static void zfcp_erp_memwait_handler(unsigned long);
-static void zfcp_erp_timeout_handler(unsigned long);
-static inline void zfcp_erp_timeout_init(struct zfcp_erp_action *);
-
-/**
- * zfcp_fsf_request_timeout_handler - called if a request timed out
- * @data: pointer to adapter for handler function
- *
- * This function needs to be called if requests (ELS, Generic Service,
- * or SCSI commands) exceed a certain time limit. The assumption is
- * that after the time limit the adapter get stuck. So we trigger a reopen of
- * the adapter. This should not be used for error recovery, SCSI abort
- * commands and SCSI requests from SCSI mid-layer.
- */
-void
-zfcp_fsf_request_timeout_handler(unsigned long data)
+static void zfcp_erp_action_ready(struct zfcp_erp_action *act)
{
- struct zfcp_adapter *adapter;
+ struct zfcp_adapter *adapter = act->adapter;
- adapter = (struct zfcp_adapter *) data;
-
- zfcp_erp_adapter_reopen(adapter, 0);
+ list_move(&act->list, &act->adapter->erp_ready_head);
+ zfcp_dbf_rec_action("erardy1", act);
+ wake_up(&adapter->erp_ready_wq);
+ zfcp_dbf_rec_thread("erardy2", adapter->dbf);
}
-/*
- * function: zfcp_fsf_scsi_er_timeout_handler
- *
- * purpose: This function needs to be called whenever a SCSI error recovery
- * action (abort/reset) does not return.
- * Re-opening the adapter means that the command can be returned
- * by zfcp (it is guarranteed that it does not return via the
- * adapter anymore). The buffer can then be used again.
- *
- * returns: sod all
- */
-void
-zfcp_fsf_scsi_er_timeout_handler(unsigned long data)
+static void zfcp_erp_action_dismiss(struct zfcp_erp_action *act)
{
- struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
-
- ZFCP_LOG_NORMAL("warning: SCSI error recovery timed out. "
- "Restarting all operations on the adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
- debug_text_event(adapter->erp_dbf, 1, "eh_lmem_tout");
- zfcp_erp_adapter_reopen(adapter, 0);
+ act->status |= ZFCP_STATUS_ERP_DISMISSED;
+ if (zfcp_erp_action_exists(act) == ZFCP_ERP_ACTION_RUNNING)
+ zfcp_erp_action_ready(act);
+}
- return;
+static void zfcp_erp_action_dismiss_unit(struct zfcp_unit *unit)
+{
+ if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_INUSE)
+ zfcp_erp_action_dismiss(&unit->erp_action);
}
-/*
- * function:
- *
- * purpose: called if an adapter failed,
- * initiates adapter recovery which is done
- * asynchronously
- *
- * returns: 0 - initiated action succesfully
- * <0 - failed to initiate action
- */
-int
-zfcp_erp_adapter_reopen_internal(struct zfcp_adapter *adapter, int clear_mask)
+static void zfcp_erp_action_dismiss_port(struct zfcp_port *port)
{
- int retval;
+ struct zfcp_unit *unit;
- debug_text_event(adapter->erp_dbf, 5, "a_ro");
- ZFCP_LOG_DEBUG("reopen adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
+ if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_INUSE)
+ zfcp_erp_action_dismiss(&port->erp_action);
+ else {
+ read_lock(&port->unit_list_lock);
+ list_for_each_entry(unit, &port->unit_list, list)
+ zfcp_erp_action_dismiss_unit(unit);
+ read_unlock(&port->unit_list_lock);
+ }
+}
- zfcp_erp_adapter_block(adapter, clear_mask);
+static void zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *adapter)
+{
+ struct zfcp_port *port;
- if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) {
- ZFCP_LOG_DEBUG("skipped reopen of failed adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
- debug_text_event(adapter->erp_dbf, 5, "a_ro_f");
- /* ensure propagation of failed status to new devices */
- zfcp_erp_adapter_failed(adapter);
- retval = -EIO;
- goto out;
+ if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_INUSE)
+ zfcp_erp_action_dismiss(&adapter->erp_action);
+ else {
+ read_lock(&adapter->port_list_lock);
+ list_for_each_entry(port, &adapter->port_list, list)
+ zfcp_erp_action_dismiss_port(port);
+ read_unlock(&adapter->port_list_lock);
}
- retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER,
- adapter, NULL, NULL);
-
- out:
- return retval;
}
-/*
- * function:
- *
- * purpose: Wrappper for zfcp_erp_adapter_reopen_internal
- * used to ensure the correct locking
- *
- * returns: 0 - initiated action succesfully
- * <0 - failed to initiate action
- */
-int
-zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, int clear_mask)
+static int zfcp_erp_required_act(int want, struct zfcp_adapter *adapter,
+ struct zfcp_port *port,
+ struct zfcp_unit *unit)
{
- int retval;
- unsigned long flags;
+ int need = want;
+ int u_status, p_status, a_status;
- read_lock_irqsave(&zfcp_data.config_lock, flags);
- write_lock(&adapter->erp_lock);
- retval = zfcp_erp_adapter_reopen_internal(adapter, clear_mask);
- write_unlock(&adapter->erp_lock);
- read_unlock_irqrestore(&zfcp_data.config_lock, flags);
+ switch (want) {
+ case ZFCP_ERP_ACTION_REOPEN_UNIT:
+ u_status = atomic_read(&unit->status);
+ if (u_status & ZFCP_STATUS_COMMON_ERP_INUSE)
+ return 0;
+ p_status = atomic_read(&port->status);
+ if (!(p_status & ZFCP_STATUS_COMMON_RUNNING) ||
+ p_status & ZFCP_STATUS_COMMON_ERP_FAILED)
+ return 0;
+ if (!(p_status & ZFCP_STATUS_COMMON_UNBLOCKED))
+ need = ZFCP_ERP_ACTION_REOPEN_PORT;
+ /* fall through */
+ case ZFCP_ERP_ACTION_REOPEN_PORT:
+ case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
+ p_status = atomic_read(&port->status);
+ if (p_status & ZFCP_STATUS_COMMON_ERP_INUSE)
+ return 0;
+ a_status = atomic_read(&adapter->status);
+ if (!(a_status & ZFCP_STATUS_COMMON_RUNNING) ||
+ a_status & ZFCP_STATUS_COMMON_ERP_FAILED)
+ return 0;
+ if (!(a_status & ZFCP_STATUS_COMMON_UNBLOCKED))
+ need = ZFCP_ERP_ACTION_REOPEN_ADAPTER;
+ /* fall through */
+ case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
+ a_status = atomic_read(&adapter->status);
+ if (a_status & ZFCP_STATUS_COMMON_ERP_INUSE)
+ return 0;
+ if (!(a_status & ZFCP_STATUS_COMMON_RUNNING) &&
+ !(a_status & ZFCP_STATUS_COMMON_OPEN))
+ return 0; /* shutdown requested for closed adapter */
+ }
- return retval;
+ return need;
}
-int
-zfcp_erp_adapter_shutdown(struct zfcp_adapter *adapter, int clear_mask)
+static struct zfcp_erp_action *zfcp_erp_setup_act(int need,
+ struct zfcp_adapter *adapter,
+ struct zfcp_port *port,
+ struct zfcp_unit *unit)
{
- int retval;
+ struct zfcp_erp_action *erp_action;
+ u32 status = 0;
- retval = zfcp_erp_adapter_reopen(adapter,
- ZFCP_STATUS_COMMON_RUNNING |
- ZFCP_STATUS_COMMON_ERP_FAILED |
- clear_mask);
+ switch (need) {
+ case ZFCP_ERP_ACTION_REOPEN_UNIT:
+ if (!get_device(&unit->dev))
+ return NULL;
+ atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status);
+ erp_action = &unit->erp_action;
+ if (!(atomic_read(&unit->status) & ZFCP_STATUS_COMMON_RUNNING))
+ status = ZFCP_STATUS_ERP_CLOSE_ONLY;
+ break;
- return retval;
-}
+ case ZFCP_ERP_ACTION_REOPEN_PORT:
+ case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
+ if (!get_device(&port->dev))
+ return NULL;
+ zfcp_erp_action_dismiss_port(port);
+ atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status);
+ erp_action = &port->erp_action;
+ if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_RUNNING))
+ status = ZFCP_STATUS_ERP_CLOSE_ONLY;
+ break;
-int
-zfcp_erp_port_shutdown(struct zfcp_port *port, int clear_mask)
-{
- int retval;
+ case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
+ kref_get(&adapter->ref);
+ zfcp_erp_action_dismiss_adapter(adapter);
+ atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status);
+ erp_action = &adapter->erp_action;
+ if (!(atomic_read(&adapter->status) &
+ ZFCP_STATUS_COMMON_RUNNING))
+ status = ZFCP_STATUS_ERP_CLOSE_ONLY;
+ break;
- retval = zfcp_erp_port_reopen(port,
- ZFCP_STATUS_COMMON_RUNNING |
- ZFCP_STATUS_COMMON_ERP_FAILED |
- clear_mask);
+ default:
+ return NULL;
+ }
- return retval;
+ memset(erp_action, 0, sizeof(struct zfcp_erp_action));
+ erp_action->adapter = adapter;
+ erp_action->port = port;
+ erp_action->unit = unit;
+ erp_action->action = need;
+ erp_action->status = status;
+
+ return erp_action;
}
-int
-zfcp_erp_unit_shutdown(struct zfcp_unit *unit, int clear_mask)
+static int zfcp_erp_action_enqueue(int want, struct zfcp_adapter *adapter,
+ struct zfcp_port *port,
+ struct zfcp_unit *unit, char *id, void *ref)
{
- int retval;
+ int retval = 1, need;
+ struct zfcp_erp_action *act = NULL;
+
+ if (!adapter->erp_thread)
+ return -EIO;
- retval = zfcp_erp_unit_reopen(unit,
- ZFCP_STATUS_COMMON_RUNNING |
- ZFCP_STATUS_COMMON_ERP_FAILED |
- clear_mask);
+ need = zfcp_erp_required_act(want, adapter, port, unit);
+ if (!need)
+ goto out;
+ atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, &adapter->status);
+ act = zfcp_erp_setup_act(need, adapter, port, unit);
+ if (!act)
+ goto out;
+ ++adapter->erp_total_count;
+ list_add_tail(&act->list, &adapter->erp_ready_head);
+ wake_up(&adapter->erp_ready_wq);
+ zfcp_dbf_rec_thread("eracte1", adapter->dbf);
+ retval = 0;
+ out:
+ zfcp_dbf_rec_trigger(id, ref, want, need, act, adapter, port, unit);
return retval;
}
-
-/**
- * zfcp_erp_adisc - send ADISC ELS command
- * @port: port structure
- */
-int
-zfcp_erp_adisc(struct zfcp_port *port)
+static int _zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter,
+ int clear_mask, char *id, void *ref)
{
- struct zfcp_adapter *adapter = port->adapter;
- struct zfcp_send_els *send_els;
- struct zfcp_ls_adisc *adisc;
- void *address = NULL;
- int retval = 0;
- struct timer_list *timer;
-
- send_els = kzalloc(sizeof(struct zfcp_send_els), GFP_ATOMIC);
- if (send_els == NULL)
- goto nomem;
-
- send_els->req = kzalloc(sizeof(struct scatterlist), GFP_ATOMIC);
- if (send_els->req == NULL)
- goto nomem;
-
- send_els->resp = kzalloc(sizeof(struct scatterlist), GFP_ATOMIC);
- if (send_els->resp == NULL)
- goto nomem;
-
- address = (void *) get_zeroed_page(GFP_ATOMIC);
- if (address == NULL)
- goto nomem;
-
- zfcp_address_to_sg(address, send_els->req);
- address += PAGE_SIZE >> 1;
- zfcp_address_to_sg(address, send_els->resp);
- send_els->req_count = send_els->resp_count = 1;
-
- send_els->adapter = adapter;
- send_els->port = port;
- send_els->d_id = port->d_id;
- send_els->handler = zfcp_erp_adisc_handler;
- send_els->handler_data = (unsigned long) send_els;
-
- adisc = zfcp_sg_to_address(send_els->req);
- send_els->ls_code = adisc->code = ZFCP_LS_ADISC;
-
- send_els->req->length = sizeof(struct zfcp_ls_adisc);
- send_els->resp->length = sizeof(struct zfcp_ls_adisc_acc);
-
- /* 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->wwpn = fc_host_port_name(adapter->scsi_host);
- adisc->wwnn = fc_host_node_name(adapter->scsi_host);
- adisc->nport_id = fc_host_port_id(adapter->scsi_host);
- ZFCP_LOG_INFO("ADISC request from s_id 0x%08x to d_id 0x%08x "
- "(wwpn=0x%016Lx, wwnn=0x%016Lx, "
- "hard_nport_id=0x%08x, nport_id=0x%08x)\n",
- adisc->nport_id, send_els->d_id, (wwn_t) adisc->wwpn,
- (wwn_t) adisc->wwnn, adisc->hard_nport_id,
- adisc->nport_id);
-
- timer = kmalloc(sizeof(struct timer_list), GFP_ATOMIC);
- if (!timer)
- goto nomem;
-
- init_timer(timer);
- timer->function = zfcp_fsf_request_timeout_handler;
- timer->data = (unsigned long) adapter;
- timer->expires = ZFCP_FSF_REQUEST_TIMEOUT;
- send_els->timer = timer;
-
- retval = zfcp_fsf_send_els(send_els);
- if (retval != 0) {
- ZFCP_LOG_NORMAL("error: initiation of Send ELS failed for port "
- "0x%08x on adapter %s\n", send_els->d_id,
- zfcp_get_busid_by_adapter(adapter));
- del_timer(send_els->timer);
- goto freemem;
- }
+ zfcp_erp_adapter_block(adapter, clear_mask);
+ zfcp_scsi_schedule_rports_block(adapter);
- goto out;
-
- nomem:
- retval = -ENOMEM;
- freemem:
- if (address != NULL)
- __free_pages(send_els->req->page, 0);
- if (send_els != NULL) {
- kfree(send_els->timer);
- kfree(send_els->req);
- kfree(send_els->resp);
- kfree(send_els);
+ /* ensure propagation of failed status to new devices */
+ if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
+ zfcp_erp_adapter_failed(adapter, "erareo1", NULL);
+ return -EIO;
}
- out:
- return retval;
+ return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER,
+ adapter, NULL, NULL, id, ref);
}
-
/**
- * zfcp_erp_adisc_handler - handler for ADISC ELS command
- * @data: pointer to struct zfcp_send_els
- *
- * If ADISC failed (LS_RJT or timed out) forced reopen of the port is triggered.
+ * zfcp_erp_adapter_reopen - Reopen adapter.
+ * @adapter: Adapter to reopen.
+ * @clear: Status flags to clear.
+ * @id: Id for debug trace event.
+ * @ref: Reference for debug trace event.
*/
-void
-zfcp_erp_adisc_handler(unsigned long data)
+void zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, int clear,
+ char *id, void *ref)
{
- struct zfcp_send_els *send_els;
- struct zfcp_port *port;
- struct zfcp_adapter *adapter;
- u32 d_id;
- struct zfcp_ls_adisc_acc *adisc;
-
- send_els = (struct zfcp_send_els *) data;
-
- del_timer(send_els->timer);
-
- adapter = send_els->adapter;
- port = send_els->port;
- d_id = send_els->d_id;
-
- /* request rejected or timed out */
- if (send_els->status != 0) {
- ZFCP_LOG_NORMAL("ELS request rejected/timed out, "
- "force physical port reopen "
- "(adapter %s, port d_id=0x%08x)\n",
- zfcp_get_busid_by_adapter(adapter), d_id);
- debug_text_event(adapter->erp_dbf, 3, "forcreop");
- if (zfcp_erp_port_forced_reopen(port, 0))
- ZFCP_LOG_NORMAL("failed reopen of port "
- "(adapter %s, wwpn=0x%016Lx)\n",
- zfcp_get_busid_by_port(port),
- port->wwpn);
- goto out;
- }
+ unsigned long flags;
- adisc = zfcp_sg_to_address(send_els->resp);
-
- ZFCP_LOG_INFO("ADISC response from d_id 0x%08x to s_id "
- "0x%08x (wwpn=0x%016Lx, wwnn=0x%016Lx, "
- "hard_nport_id=0x%08x, nport_id=0x%08x)\n",
- d_id, fc_host_port_id(adapter->scsi_host),
- (wwn_t) adisc->wwpn, (wwn_t) adisc->wwnn,
- adisc->hard_nport_id, adisc->nport_id);
-
- /* set wwnn for port */
- if (port->wwnn == 0)
- port->wwnn = adisc->wwnn;
-
- if (port->wwpn != adisc->wwpn) {
- ZFCP_LOG_NORMAL("d_id assignment changed, reopening "
- "port (adapter %s, wwpn=0x%016Lx, "
- "adisc_resp_wwpn=0x%016Lx)\n",
- zfcp_get_busid_by_port(port),
- port->wwpn, (wwn_t) adisc->wwpn);
- if (zfcp_erp_port_reopen(port, 0))
- ZFCP_LOG_NORMAL("failed reopen of port "
- "(adapter %s, wwpn=0x%016Lx)\n",
- zfcp_get_busid_by_port(port),
- port->wwpn);
- }
+ zfcp_erp_adapter_block(adapter, clear);
+ zfcp_scsi_schedule_rports_block(adapter);
- out:
- zfcp_port_put(port);
- __free_pages(send_els->req->page, 0);
- kfree(send_els->timer);
- kfree(send_els->req);
- kfree(send_els->resp);
- kfree(send_els);
+ write_lock_irqsave(&adapter->erp_lock, flags);
+ if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
+ zfcp_erp_adapter_failed(adapter, "erareo1", NULL);
+ else
+ zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER, adapter,
+ NULL, NULL, id, ref);
+ write_unlock_irqrestore(&adapter->erp_lock, flags);
}
-
/**
- * zfcp_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.
+ * zfcp_erp_adapter_shutdown - Shutdown adapter.
+ * @adapter: Adapter to shut down.
+ * @clear: Status flags to clear.
+ * @id: Id for debug trace event.
+ * @ref: Reference for debug trace event.
*/
-int
-zfcp_test_link(struct zfcp_port *port)
+void zfcp_erp_adapter_shutdown(struct zfcp_adapter *adapter, int clear,
+ char *id, void *ref)
{
- int retval;
-
- zfcp_port_get(port);
- retval = zfcp_erp_adisc(port);
- if (retval != 0) {
- zfcp_port_put(port);
- ZFCP_LOG_NORMAL("reopen needed for port 0x%016Lx "
- "on adapter %s\n ", port->wwpn,
- zfcp_get_busid_by_port(port));
- retval = zfcp_erp_port_forced_reopen(port, 0);
- if (retval != 0) {
- ZFCP_LOG_NORMAL("reopen of remote port 0x%016Lx "
- "on adapter %s failed\n", port->wwpn,
- zfcp_get_busid_by_port(port));
- retval = -EPERM;
- }
- }
-
- return retval;
+ int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED;
+ zfcp_erp_adapter_reopen(adapter, clear | flags, id, ref);
}
-
-/*
- * function:
- *
- * purpose: called if a port failed to be opened normally
- * initiates Forced Reopen recovery which is done
- * asynchronously
- *
- * returns: 0 - initiated action succesfully
- * <0 - failed to initiate action
+/**
+ * zfcp_erp_port_shutdown - Shutdown port
+ * @port: Port to shut down.
+ * @clear: Status flags to clear.
+ * @id: Id for debug trace event.
+ * @ref: Reference for debug trace event.
*/
-static int
-zfcp_erp_port_forced_reopen_internal(struct zfcp_port *port, int clear_mask)
+void zfcp_erp_port_shutdown(struct zfcp_port *port, int clear, char *id,
+ void *ref)
{
- int retval;
- struct zfcp_adapter *adapter = port->adapter;
-
- debug_text_event(adapter->erp_dbf, 5, "pf_ro");
- debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t));
-
- ZFCP_LOG_DEBUG("forced reopen of port 0x%016Lx on adapter %s\n",
- port->wwpn, zfcp_get_busid_by_port(port));
-
- zfcp_erp_port_block(port, clear_mask);
-
- if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) {
- ZFCP_LOG_DEBUG("skipped forced reopen of failed port 0x%016Lx "
- "on adapter %s\n", port->wwpn,
- zfcp_get_busid_by_port(port));
- debug_text_event(adapter->erp_dbf, 5, "pf_ro_f");
- debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t));
- retval = -EIO;
- goto out;
- }
+ int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED;
+ zfcp_erp_port_reopen(port, clear | flags, id, ref);
+}
- retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT_FORCED,
- port->adapter, port, NULL);
+/**
+ * zfcp_erp_unit_shutdown - Shutdown unit
+ * @unit: Unit to shut down.
+ * @clear: Status flags to clear.
+ * @id: Id for debug trace event.
+ * @ref: Reference for debug trace event.
+ */
+void zfcp_erp_unit_shutdown(struct zfcp_unit *unit, int clear, char *id,
+ void *ref)
+{
+ int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED;
+ zfcp_erp_unit_reopen(unit, clear | flags, id, ref);
+}
- out:
- return retval;
+static void zfcp_erp_port_block(struct zfcp_port *port, int clear)
+{
+ zfcp_erp_modify_port_status(port, "erpblk1", NULL,
+ ZFCP_STATUS_COMMON_UNBLOCKED | clear,
+ ZFCP_CLEAR);
}
-/*
- * function:
- *
- * purpose: Wrappper for zfcp_erp_port_forced_reopen_internal
- * used to ensure the correct locking
- *
- * returns: 0 - initiated action succesfully
- * <0 - failed to initiate action
- */
-int
-zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear_mask)
+static void _zfcp_erp_port_forced_reopen(struct zfcp_port *port,
+ int clear, char *id, void *ref)
{
- int retval;
- unsigned long flags;
- struct zfcp_adapter *adapter;
+ zfcp_erp_port_block(port, clear);
+ zfcp_scsi_schedule_rport_block(port);
- adapter = port->adapter;
- read_lock_irqsave(&zfcp_data.config_lock, flags);
- write_lock(&adapter->erp_lock);
- retval = zfcp_erp_port_forced_reopen_internal(port, clear_mask);
- write_unlock(&adapter->erp_lock);
- read_unlock_irqrestore(&zfcp_data.config_lock, flags);
+ if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
+ return;
- return retval;
+ zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT_FORCED,
+ port->adapter, port, NULL, id, ref);
}
-/*
- * function:
- *
- * purpose: called if a port is to be opened
- * initiates Reopen recovery which is done
- * asynchronously
- *
- * returns: 0 - initiated action succesfully
- * <0 - failed to initiate action
+/**
+ * zfcp_erp_port_forced_reopen - Forced close of port and open again
+ * @port: Port to force close and to reopen.
+ * @id: Id for debug trace event.
+ * @ref: Reference for debug trace event.
*/
-static int
-zfcp_erp_port_reopen_internal(struct zfcp_port *port, int clear_mask)
+void zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear, char *id,
+ void *ref)
{
- int retval;
+ unsigned long flags;
struct zfcp_adapter *adapter = port->adapter;
- debug_text_event(adapter->erp_dbf, 5, "p_ro");
- debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t));
-
- ZFCP_LOG_DEBUG("reopen of port 0x%016Lx on adapter %s\n",
- port->wwpn, zfcp_get_busid_by_port(port));
+ write_lock_irqsave(&adapter->erp_lock, flags);
+ _zfcp_erp_port_forced_reopen(port, clear, id, ref);
+ write_unlock_irqrestore(&adapter->erp_lock, flags);
+}
- zfcp_erp_port_block(port, clear_mask);
+static int _zfcp_erp_port_reopen(struct zfcp_port *port, int clear, char *id,
+ void *ref)
+{
+ zfcp_erp_port_block(port, clear);
+ zfcp_scsi_schedule_rport_block(port);
- if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) {
- ZFCP_LOG_DEBUG("skipped reopen of failed port 0x%016Lx "
- "on adapter %s\n", port->wwpn,
- zfcp_get_busid_by_port(port));
- debug_text_event(adapter->erp_dbf, 5, "p_ro_f");
- debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t));
+ if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
/* ensure propagation of failed status to new devices */
- zfcp_erp_port_failed(port);
- retval = -EIO;
- goto out;
+ zfcp_erp_port_failed(port, "erpreo1", NULL);
+ return -EIO;
}
- retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT,
- port->adapter, port, NULL);
-
- out:
- return retval;
+ return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT,
+ port->adapter, port, NULL, id, ref);
}
/**
- * zfcp_erp_port_reopen - initiate reopen of a remote port
- * @port: port to be reopened
- * @clear_mask: specifies flags in port status to be cleared
- * Return: 0 on success, < 0 on error
+ * zfcp_erp_port_reopen - trigger remote port recovery
+ * @port: port to recover
+ * @clear_mask: flags in port status to be cleared
*
- * This is a wrappper function for zfcp_erp_port_reopen_internal. It ensures
- * correct locking. An error recovery task is initiated to do the reopen.
- * To wait for the completion of the reopen zfcp_erp_wait should be used.
+ * Returns 0 if recovery has been triggered, < 0 if not.
*/
-int
-zfcp_erp_port_reopen(struct zfcp_port *port, int clear_mask)
+int zfcp_erp_port_reopen(struct zfcp_port *port, int clear, char *id, void *ref)
{
int retval;
unsigned long flags;
struct zfcp_adapter *adapter = port->adapter;
- read_lock_irqsave(&zfcp_data.config_lock, flags);
- write_lock(&adapter->erp_lock);
- retval = zfcp_erp_port_reopen_internal(port, clear_mask);
- write_unlock(&adapter->erp_lock);
- read_unlock_irqrestore(&zfcp_data.config_lock, flags);
+ write_lock_irqsave(&adapter->erp_lock, flags);
+ retval = _zfcp_erp_port_reopen(port, clear, id, ref);
+ write_unlock_irqrestore(&adapter->erp_lock, flags);
return retval;
}
-/*
- * function:
- *
- * purpose: called if a unit is to be opened
- * initiates Reopen recovery which is done
- * asynchronously
- *
- * returns: 0 - initiated action succesfully
- * <0 - failed to initiate action
- */
-static int
-zfcp_erp_unit_reopen_internal(struct zfcp_unit *unit, int clear_mask)
+static void zfcp_erp_unit_block(struct zfcp_unit *unit, int clear_mask)
+{
+ zfcp_erp_modify_unit_status(unit, "erublk1", NULL,
+ ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask,
+ ZFCP_CLEAR);
+}
+
+static void _zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear, char *id,
+ void *ref)
{
- int retval;
struct zfcp_adapter *adapter = unit->port->adapter;
- debug_text_event(adapter->erp_dbf, 5, "u_ro");
- debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, sizeof (fcp_lun_t));
- ZFCP_LOG_DEBUG("reopen of unit 0x%016Lx on port 0x%016Lx "
- "on adapter %s\n", unit->fcp_lun,
- unit->port->wwpn, zfcp_get_busid_by_unit(unit));
-
- zfcp_erp_unit_block(unit, clear_mask);
-
- if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status)) {
- ZFCP_LOG_DEBUG("skipped reopen of failed unit 0x%016Lx "
- "on port 0x%016Lx on adapter %s\n",
- unit->fcp_lun, unit->port->wwpn,
- zfcp_get_busid_by_unit(unit));
- debug_text_event(adapter->erp_dbf, 5, "u_ro_f");
- debug_event(adapter->erp_dbf, 5, &unit->fcp_lun,
- sizeof (fcp_lun_t));
- retval = -EIO;
- goto out;
- }
+ zfcp_erp_unit_block(unit, clear);
- retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_UNIT,
- unit->port->adapter, unit->port, unit);
- out:
- return retval;
+ if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
+ return;
+
+ zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_UNIT,
+ adapter, unit->port, unit, id, ref);
}
/**
* @unit: unit to be reopened
* @clear_mask: specifies flags in unit status to be cleared
* Return: 0 on success, < 0 on error
- *
- * This is a wrappper for zfcp_erp_unit_reopen_internal. It ensures correct
- * locking. An error recovery task is initiated to do the reopen.
- * To wait for the completion of the reopen zfcp_erp_wait should be used.
*/
-int
-zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear_mask)
+void zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear, char *id,
+ void *ref)
{
- int retval;
unsigned long flags;
- struct zfcp_adapter *adapter;
- struct zfcp_port *port;
-
- port = unit->port;
- adapter = port->adapter;
-
- read_lock_irqsave(&zfcp_data.config_lock, flags);
- write_lock(&adapter->erp_lock);
- retval = zfcp_erp_unit_reopen_internal(unit, clear_mask);
- write_unlock(&adapter->erp_lock);
- read_unlock_irqrestore(&zfcp_data.config_lock, flags);
+ struct zfcp_port *port = unit->port;
+ struct zfcp_adapter *adapter = port->adapter;
- return retval;
+ write_lock_irqsave(&adapter->erp_lock, flags);
+ _zfcp_erp_unit_reopen(unit, clear, id, ref);
+ write_unlock_irqrestore(&adapter->erp_lock, flags);
}
-/*
- * function:
- *
- * purpose: disable I/O,
- * return any open requests and clean them up,
- * aim: no pending and incoming I/O
- *
- * returns:
- */
-static void
-zfcp_erp_adapter_block(struct zfcp_adapter *adapter, int clear_mask)
+static int status_change_set(unsigned long mask, atomic_t *status)
{
- debug_text_event(adapter->erp_dbf, 6, "a_bl");
- zfcp_erp_modify_adapter_status(adapter,
- ZFCP_STATUS_COMMON_UNBLOCKED |
- clear_mask, ZFCP_CLEAR);
+ return (atomic_read(status) ^ mask) & mask;
}
-/*
- * function:
- *
- * purpose: enable I/O
- *
- * returns:
- */
-static void
-zfcp_erp_adapter_unblock(struct zfcp_adapter *adapter)
+static int status_change_clear(unsigned long mask, atomic_t *status)
{
- debug_text_event(adapter->erp_dbf, 6, "a_ubl");
- atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status);
+ return atomic_read(status) & mask;
}
-/*
- * function:
- *
- * purpose: disable I/O,
- * return any open requests and clean them up,
- * aim: no pending and incoming I/O
- *
- * returns:
- */
-static void
-zfcp_erp_port_block(struct zfcp_port *port, int clear_mask)
+static void zfcp_erp_adapter_unblock(struct zfcp_adapter *adapter)
{
- struct zfcp_adapter *adapter = port->adapter;
-
- debug_text_event(adapter->erp_dbf, 6, "p_bl");
- debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t));
- zfcp_erp_modify_port_status(port,
- ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask,
- ZFCP_CLEAR);
+ if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status))
+ zfcp_dbf_rec_adapter("eraubl1", NULL, adapter->dbf);
+ atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status);
}
-/*
- * function:
- *
- * purpose: enable I/O
- *
- * returns:
- */
-static void
-zfcp_erp_port_unblock(struct zfcp_port *port)
+static void zfcp_erp_port_unblock(struct zfcp_port *port)
{
- struct zfcp_adapter *adapter = port->adapter;
-
- debug_text_event(adapter->erp_dbf, 6, "p_ubl");
- debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t));
+ if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status))
+ zfcp_dbf_rec_port("erpubl1", NULL, port);
atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status);
}
-/*
- * function:
- *
- * purpose: disable I/O,
- * return any open requests and clean them up,
- * aim: no pending and incoming I/O
- *
- * returns:
- */
-static void
-zfcp_erp_unit_block(struct zfcp_unit *unit, int clear_mask)
+static void zfcp_erp_unit_unblock(struct zfcp_unit *unit)
{
- struct zfcp_adapter *adapter = unit->port->adapter;
-
- debug_text_event(adapter->erp_dbf, 6, "u_bl");
- debug_event(adapter->erp_dbf, 6, &unit->fcp_lun, sizeof (fcp_lun_t));
- zfcp_erp_modify_unit_status(unit,
- ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask,
- ZFCP_CLEAR);
+ if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status))
+ zfcp_dbf_rec_unit("eruubl1", NULL, unit);
+ atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status);
}
-/*
- * function:
- *
- * purpose: enable I/O
- *
- * returns:
- */
-static void
-zfcp_erp_unit_unblock(struct zfcp_unit *unit)
+static void zfcp_erp_action_to_running(struct zfcp_erp_action *erp_action)
{
- struct zfcp_adapter *adapter = unit->port->adapter;
-
- debug_text_event(adapter->erp_dbf, 6, "u_ubl");
- debug_event(adapter->erp_dbf, 6, &unit->fcp_lun, sizeof (fcp_lun_t));
- atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status);
+ list_move(&erp_action->list, &erp_action->adapter->erp_running_head);
+ zfcp_dbf_rec_action("erator1", erp_action);
}
-static void
-zfcp_erp_action_ready(struct zfcp_erp_action *erp_action)
+static void zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *act)
{
- struct zfcp_adapter *adapter = erp_action->adapter;
+ struct zfcp_adapter *adapter = act->adapter;
+ struct zfcp_fsf_req *req;
- debug_text_event(adapter->erp_dbf, 4, "a_ar");
- debug_event(adapter->erp_dbf, 4, &erp_action->action, sizeof (int));
+ if (!act->fsf_req_id)
+ return;
- zfcp_erp_action_to_ready(erp_action);
- up(&adapter->erp_ready_sem);
+ spin_lock(&adapter->req_list->lock);
+ req = _zfcp_reqlist_find(adapter->req_list, act->fsf_req_id);
+ if (req && req->erp_action == act) {
+ if (act->status & (ZFCP_STATUS_ERP_DISMISSED |
+ ZFCP_STATUS_ERP_TIMEDOUT)) {
+ req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
+ zfcp_dbf_rec_action("erscf_1", act);
+ req->erp_action = NULL;
+ }
+ if (act->status & ZFCP_STATUS_ERP_TIMEDOUT)
+ zfcp_dbf_rec_action("erscf_2", act);
+ if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED)
+ act->fsf_req_id = 0;
+ } else
+ act->fsf_req_id = 0;
+ spin_unlock(&adapter->req_list->lock);
}
-/*
- * function:
- *
- * purpose:
- *
- * returns: <0 erp_action not found in any list
- * ZFCP_ERP_ACTION_READY erp_action is in ready list
- * ZFCP_ERP_ACTION_RUNNING erp_action is in running list
- *
- * locks: erp_lock must be held
+/**
+ * zfcp_erp_notify - Trigger ERP action.
+ * @erp_action: ERP action to continue.
+ * @set_mask: ERP action status flags to set.
*/
-static int
-zfcp_erp_action_exists(struct zfcp_erp_action *erp_action)
+void zfcp_erp_notify(struct zfcp_erp_action *erp_action, unsigned long set_mask)
{
- int retval = -EINVAL;
- struct list_head *entry;
- struct zfcp_erp_action *entry_erp_action;
struct zfcp_adapter *adapter = erp_action->adapter;
+ unsigned long flags;
- /* search in running list */
- list_for_each(entry, &adapter->erp_running_head) {
- entry_erp_action =
- list_entry(entry, struct zfcp_erp_action, list);
- if (entry_erp_action == erp_action) {
- retval = ZFCP_ERP_ACTION_RUNNING;
- goto out;
- }
- }
- /* search in ready list */
- list_for_each(entry, &adapter->erp_ready_head) {
- entry_erp_action =
- list_entry(entry, struct zfcp_erp_action, list);
- if (entry_erp_action == erp_action) {
- retval = ZFCP_ERP_ACTION_READY;
- goto out;
- }
+ write_lock_irqsave(&adapter->erp_lock, flags);
+ if (zfcp_erp_action_exists(erp_action) == ZFCP_ERP_ACTION_RUNNING) {
+ erp_action->status |= set_mask;
+ zfcp_erp_action_ready(erp_action);
}
-
- out:
- return retval;
+ write_unlock_irqrestore(&adapter->erp_lock, flags);
}
-/*
- * purpose: checks current status of action (timed out, dismissed, ...)
- * and does appropriate preparations (dismiss fsf request, ...)
- *
- * locks: called under erp_lock (disabled interrupts)
- *
- * returns: 0
- */
-static int
-zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *erp_action)
-{
- int retval = 0;
- struct zfcp_fsf_req *fsf_req = NULL;
- struct zfcp_adapter *adapter = erp_action->adapter;
-
- if (erp_action->fsf_req) {
- /* take lock to ensure that request is not being deleted meanwhile */
- spin_lock(&adapter->fsf_req_list_lock);
- /* check whether fsf req does still exist */
- list_for_each_entry(fsf_req, &adapter->fsf_req_list_head, list)
- if (fsf_req == erp_action->fsf_req)
- break;
- if (fsf_req && (fsf_req->erp_action == erp_action)) {
- /* fsf_req still exists */
- debug_text_event(adapter->erp_dbf, 3, "a_ca_req");
- debug_event(adapter->erp_dbf, 3, &fsf_req,
- sizeof (unsigned long));
- /* dismiss fsf_req of timed out or dismissed erp_action */
- if (erp_action->status & (ZFCP_STATUS_ERP_DISMISSED |
- ZFCP_STATUS_ERP_TIMEDOUT)) {
- debug_text_event(adapter->erp_dbf, 3,
- "a_ca_disreq");
- fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
- }
- if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) {
- ZFCP_LOG_NORMAL("error: erp step timed out "
- "(action=%d, fsf_req=%p)\n ",
- erp_action->action,
- erp_action->fsf_req);
- }
- /*
- * If fsf_req is neither dismissed nor completed
- * then keep it running asynchronously and don't mess
- * with the association of erp_action and fsf_req.
- */
- if (fsf_req->status & (ZFCP_STATUS_FSFREQ_COMPLETED |
- ZFCP_STATUS_FSFREQ_DISMISSED)) {
- /* forget about association between fsf_req
- and erp_action */
- fsf_req->erp_action = NULL;
- erp_action->fsf_req = NULL;
- }
- } else {
- debug_text_event(adapter->erp_dbf, 3, "a_ca_gonereq");
- /*
- * even if this fsf_req has gone, forget about
- * association between erp_action and fsf_req
- */
- erp_action->fsf_req = NULL;
- }
- spin_unlock(&adapter->fsf_req_list_lock);
- } else
- debug_text_event(adapter->erp_dbf, 3, "a_ca_noreq");
-
- return retval;
-}
-
-/*
- * purpose: generic handler for asynchronous events related to erp_action events
- * (normal completion, time-out, dismissing, retry after
- * low memory condition)
- *
- * note: deletion of timer is not required (e.g. in case of a time-out),
- * but a second try does no harm,
- * we leave it in here to allow for greater simplification
- *
- * returns: 0 - there was an action to handle
- * !0 - otherwise
- */
-static int
-zfcp_erp_async_handler_nolock(struct zfcp_erp_action *erp_action,
- unsigned long set_mask)
-{
- int retval;
- struct zfcp_adapter *adapter = erp_action->adapter;
-
- if (zfcp_erp_action_exists(erp_action) == ZFCP_ERP_ACTION_RUNNING) {
- debug_text_event(adapter->erp_dbf, 2, "a_asyh_ex");
- debug_event(adapter->erp_dbf, 2, &erp_action->action,
- sizeof (int));
- if (!(set_mask & ZFCP_STATUS_ERP_TIMEDOUT))
- del_timer(&erp_action->timer);
- erp_action->status |= set_mask;
- zfcp_erp_action_ready(erp_action);
- retval = 0;
- } else {
- /* action is ready or gone - nothing to do */
- debug_text_event(adapter->erp_dbf, 3, "a_asyh_gone");
- debug_event(adapter->erp_dbf, 3, &erp_action->action,
- sizeof (int));
- retval = 1;
- }
-
- return retval;
-}
-
-/*
- * purpose: generic handler for asynchronous events related to erp_action
- * events (normal completion, time-out, dismissing, retry after
- * low memory condition)
- *
- * note: deletion of timer is not required (e.g. in case of a time-out),
- * but a second try does no harm,
- * we leave it in here to allow for greater simplification
- *
- * returns: 0 - there was an action to handle
- * !0 - otherwise
- */
-int
-zfcp_erp_async_handler(struct zfcp_erp_action *erp_action,
- unsigned long set_mask)
-{
- struct zfcp_adapter *adapter = erp_action->adapter;
- unsigned long flags;
- int retval;
-
- write_lock_irqsave(&adapter->erp_lock, flags);
- retval = zfcp_erp_async_handler_nolock(erp_action, set_mask);
- write_unlock_irqrestore(&adapter->erp_lock, flags);
-
- return retval;
-}
-
-/*
- * purpose: is called for erp_action which was slept waiting for
- * memory becoming avaliable,
- * will trigger that this action will be continued
- */
-static void
-zfcp_erp_memwait_handler(unsigned long data)
-{
- struct zfcp_erp_action *erp_action = (struct zfcp_erp_action *) data;
- struct zfcp_adapter *adapter = erp_action->adapter;
-
- debug_text_event(adapter->erp_dbf, 2, "a_mwh");
- debug_event(adapter->erp_dbf, 2, &erp_action->action, sizeof (int));
-
- zfcp_erp_async_handler(erp_action, 0);
-}
-
-/*
- * purpose: is called if an asynchronous erp step timed out,
- * action gets an appropriate flag and will be processed
- * accordingly
- */
-static void
-zfcp_erp_timeout_handler(unsigned long data)
-{
- struct zfcp_erp_action *erp_action = (struct zfcp_erp_action *) data;
- struct zfcp_adapter *adapter = erp_action->adapter;
-
- debug_text_event(adapter->erp_dbf, 2, "a_th");
- debug_event(adapter->erp_dbf, 2, &erp_action->action, sizeof (int));
-
- zfcp_erp_async_handler(erp_action, ZFCP_STATUS_ERP_TIMEDOUT);
-}
-
-/*
- * purpose: is called for an erp_action which needs to be ended
- * though not being done,
- * this is usually required if an higher is generated,
- * action gets an appropriate flag and will be processed
- * accordingly
- *
- * locks: erp_lock held (thus we need to call another handler variant)
- */
-static int
-zfcp_erp_action_dismiss(struct zfcp_erp_action *erp_action)
-{
- struct zfcp_adapter *adapter = erp_action->adapter;
-
- debug_text_event(adapter->erp_dbf, 2, "a_adis");
- debug_event(adapter->erp_dbf, 2, &erp_action->action, sizeof (int));
-
- zfcp_erp_async_handler_nolock(erp_action, ZFCP_STATUS_ERP_DISMISSED);
-
- return 0;
-}
-
-int
-zfcp_erp_thread_setup(struct zfcp_adapter *adapter)
-{
- int retval = 0;
-
- atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status);
-
- retval = kernel_thread(zfcp_erp_thread, adapter, SIGCHLD);
- if (retval < 0) {
- ZFCP_LOG_NORMAL("error: creation of erp thread failed for "
- "adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
- debug_text_event(adapter->erp_dbf, 5, "a_thset_fail");
- } else {
- wait_event(adapter->erp_thread_wqh,
- atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP,
- &adapter->status));
- debug_text_event(adapter->erp_dbf, 5, "a_thset_ok");
- }
-
- return (retval < 0);
-}
-
-/*
- * function:
- *
- * purpose:
- *
- * returns:
- *
- * context: process (i.e. proc-fs or rmmod/insmod)
- *
- * note: The caller of this routine ensures that the specified
- * adapter has been shut down and that this operation
- * has been completed. Thus, there are no pending erp_actions
- * which would need to be handled here.
- */
-int
-zfcp_erp_thread_kill(struct zfcp_adapter *adapter)
-{
- int retval = 0;
-
- atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, &adapter->status);
- up(&adapter->erp_ready_sem);
-
- wait_event(adapter->erp_thread_wqh,
- !atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP,
- &adapter->status));
-
- atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL,
- &adapter->status);
-
- debug_text_event(adapter->erp_dbf, 5, "a_thki_ok");
-
- return retval;
-}
-
-/*
- * purpose: is run as a kernel thread,
- * goes through list of error recovery actions of associated adapter
- * and delegates single action to execution
- *
- * returns: 0
- */
-static int
-zfcp_erp_thread(void *data)
-{
- struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
- struct list_head *next;
- struct zfcp_erp_action *erp_action;
- unsigned long flags;
-
- daemonize("zfcperp%s", zfcp_get_busid_by_adapter(adapter));
- /* Block all signals */
- siginitsetinv(¤t->blocked, 0);
- atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status);
- debug_text_event(adapter->erp_dbf, 5, "a_th_run");
- wake_up(&adapter->erp_thread_wqh);
-
- while (!atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL,
- &adapter->status)) {
-
- write_lock_irqsave(&adapter->erp_lock, flags);
- next = adapter->erp_ready_head.prev;
- write_unlock_irqrestore(&adapter->erp_lock, flags);
-
- if (next != &adapter->erp_ready_head) {
- erp_action =
- list_entry(next, struct zfcp_erp_action, list);
- /*
- * process action (incl. [re]moving it
- * from 'ready' queue)
- */
- zfcp_erp_strategy(erp_action);
- }
-
- /*
- * sleep as long as there is nothing to do, i.e.
- * no action in 'ready' queue to be processed and
- * thread is not to be killed
- */
- down_interruptible(&adapter->erp_ready_sem);
- debug_text_event(adapter->erp_dbf, 5, "a_th_woken");
- }
-
- atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status);
- debug_text_event(adapter->erp_dbf, 5, "a_th_stop");
- wake_up(&adapter->erp_thread_wqh);
-
- return 0;
-}
-
-/*
- * function:
- *
- * purpose: drives single error recovery action and schedules higher and
- * subordinate actions, if necessary
- *
- * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously)
- * ZFCP_ERP_SUCCEEDED - action finished successfully (deqd)
- * ZFCP_ERP_FAILED - action finished unsuccessfully (deqd)
- * ZFCP_ERP_EXIT - action finished (dequeued), offline
- * ZFCP_ERP_DISMISSED - action canceled (dequeued)
- */
-static int
-zfcp_erp_strategy(struct zfcp_erp_action *erp_action)
-{
- int retval = 0;
- struct zfcp_adapter *adapter = erp_action->adapter;
- struct zfcp_port *port = erp_action->port;
- struct zfcp_unit *unit = erp_action->unit;
- int action = erp_action->action;
- u32 status = erp_action->status;
- unsigned long flags;
-
- /* serialise dismissing, timing out, moving, enqueueing */
- read_lock_irqsave(&zfcp_data.config_lock, flags);
- write_lock(&adapter->erp_lock);
-
- /* dequeue dismissed action and leave, if required */
- retval = zfcp_erp_strategy_check_action(erp_action, retval);
- if (retval == ZFCP_ERP_DISMISSED) {
- debug_text_event(adapter->erp_dbf, 4, "a_st_dis1");
- goto unlock;
- }
-
- /*
- * move action to 'running' queue before processing it
- * (to avoid a race condition regarding moving the
- * action to the 'running' queue and back)
- */
- zfcp_erp_action_to_running(erp_action);
-
- /*
- * try to process action as far as possible,
- * no lock to allow for blocking operations (kmalloc, qdio, ...),
- * afterwards the lock is required again for the following reasons:
- * - dequeueing of finished action and enqueueing of
- * follow-up actions must be atomic so that any other
- * reopen-routine does not believe there is nothing to do
- * and that it is safe to enqueue something else,
- * - we want to force any control thread which is dismissing
- * actions to finish this before we decide about
- * necessary steps to be taken here further
- */
- write_unlock(&adapter->erp_lock);
- read_unlock_irqrestore(&zfcp_data.config_lock, flags);
- retval = zfcp_erp_strategy_do_action(erp_action);
- read_lock_irqsave(&zfcp_data.config_lock, flags);
- write_lock(&adapter->erp_lock);
-
- /*
- * check for dismissed status again to avoid follow-up actions,
- * failing of targets and so on for dismissed actions
- */
- retval = zfcp_erp_strategy_check_action(erp_action, retval);
-
- switch (retval) {
- case ZFCP_ERP_DISMISSED:
- /* leave since this action has ridden to its ancestors */
- debug_text_event(adapter->erp_dbf, 6, "a_st_dis2");
- goto unlock;
- case ZFCP_ERP_NOMEM:
- /* no memory to continue immediately, let it sleep */
- if (!(erp_action->status & ZFCP_STATUS_ERP_LOWMEM)) {
- ++adapter->erp_low_mem_count;
- erp_action->status |= ZFCP_STATUS_ERP_LOWMEM;
- }
- /* This condition is true if there is no memory available
- for any erp_action on this adapter. This implies that there
- are no elements in the memory pool(s) left for erp_actions.
- This might happen if an erp_action that used a memory pool
- element was timed out.
- */
- if (adapter->erp_total_count == adapter->erp_low_mem_count) {
- debug_text_event(adapter->erp_dbf, 3, "a_st_lowmem");
- ZFCP_LOG_NORMAL("error: no mempool elements available, "
- "restarting I/O on adapter %s "
- "to free mempool\n",
- zfcp_get_busid_by_adapter(adapter));
- zfcp_erp_adapter_reopen_internal(adapter, 0);
- } else {
- debug_text_event(adapter->erp_dbf, 2, "a_st_memw");
- retval = zfcp_erp_strategy_memwait(erp_action);
- }
- goto unlock;
- case ZFCP_ERP_CONTINUES:
- /* leave since this action runs asynchronously */
- debug_text_event(adapter->erp_dbf, 6, "a_st_cont");
- if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) {
- --adapter->erp_low_mem_count;
- erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM;
- }
- goto unlock;
- }
- /* ok, finished action (whatever its result is) */
-
- /* check for unrecoverable targets */
- retval = zfcp_erp_strategy_check_target(erp_action, retval);
-
- /* action must be dequeued (here to allow for further ones) */
- zfcp_erp_action_dequeue(erp_action);
-
- /*
- * put this target through the erp mill again if someone has
- * requested to change the status of a target being online
- * to offline or the other way around
- * (old retval is preserved if nothing has to be done here)
- */
- retval = zfcp_erp_strategy_statechange(action, status, adapter,
- port, unit, retval);
-
- /*
- * leave if target is in permanent error state or if
- * action is repeated in order to process state change
- */
- if (retval == ZFCP_ERP_EXIT) {
- debug_text_event(adapter->erp_dbf, 2, "a_st_exit");
- goto unlock;
- }
-
- /* trigger follow up actions */
- zfcp_erp_strategy_followup_actions(action, adapter, port, unit, retval);
-
- unlock:
- write_unlock(&adapter->erp_lock);
- read_unlock_irqrestore(&zfcp_data.config_lock, flags);
-
- if (retval != ZFCP_ERP_CONTINUES)
- zfcp_erp_action_cleanup(action, adapter, port, unit, retval);
-
- /*
- * a few tasks remain when the erp queues are empty
- * (don't do that if the last action evaluated was dismissed
- * since this clearly indicates that there is more to come) :
- * - close the name server port if it is open yet
- * (enqueues another [probably] final action)
- * - otherwise, wake up whoever wants to be woken when we are
- * done with erp
- */
- if (retval != ZFCP_ERP_DISMISSED)
- zfcp_erp_strategy_check_queues(adapter);
-
- debug_text_event(adapter->erp_dbf, 6, "a_st_done");
-
- return retval;
-}
-
-/*
- * function:
- *
- * purpose:
- *
- * returns: ZFCP_ERP_DISMISSED - if action has been dismissed
- * retval - otherwise
- */
-static int
-zfcp_erp_strategy_check_action(struct zfcp_erp_action *erp_action, int retval)
-{
- struct zfcp_adapter *adapter = erp_action->adapter;
-
- zfcp_erp_strategy_check_fsfreq(erp_action);
-
- debug_event(adapter->erp_dbf, 5, &erp_action->action, sizeof (int));
- if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) {
- debug_text_event(adapter->erp_dbf, 3, "a_stcd_dis");
- zfcp_erp_action_dequeue(erp_action);
- retval = ZFCP_ERP_DISMISSED;
- } else
- debug_text_event(adapter->erp_dbf, 5, "a_stcd_nodis");
-
- return retval;
-}
-
-static int
-zfcp_erp_strategy_do_action(struct zfcp_erp_action *erp_action)
-{
- int retval = ZFCP_ERP_FAILED;
- struct zfcp_adapter *adapter = erp_action->adapter;
-
- /*
- * try to execute/continue action as far as possible,
- * note: no lock in subsequent strategy routines
- * (this allows these routine to call schedule, e.g.
- * kmalloc with such flags or qdio_initialize & friends)
- * Note: in case of timeout, the seperate strategies will fail
- * anyhow. No need for a special action. Even worse, a nameserver
- * failure would not wake up waiting ports without the call.
- */
- switch (erp_action->action) {
-
- case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
- retval = zfcp_erp_adapter_strategy(erp_action);
- break;
-
- case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
- retval = zfcp_erp_port_forced_strategy(erp_action);
- break;
-
- case ZFCP_ERP_ACTION_REOPEN_PORT:
- retval = zfcp_erp_port_strategy(erp_action);
- break;
-
- case ZFCP_ERP_ACTION_REOPEN_UNIT:
- retval = zfcp_erp_unit_strategy(erp_action);
- break;
-
- default:
- debug_text_exception(adapter->erp_dbf, 1, "a_stda_bug");
- debug_event(adapter->erp_dbf, 1, &erp_action->action,
- sizeof (int));
- ZFCP_LOG_NORMAL("bug: unknown erp action requested on "
- "adapter %s (action=%d)\n",
- zfcp_get_busid_by_adapter(erp_action->adapter),
- erp_action->action);
- }
-
- return retval;
-}
-
-/*
- * function:
- *
- * purpose: triggers retry of this action after a certain amount of time
- * by means of timer provided by erp_action
- *
- * returns: ZFCP_ERP_CONTINUES - erp_action sleeps in erp running queue
- */
-static int
-zfcp_erp_strategy_memwait(struct zfcp_erp_action *erp_action)
-{
- int retval = ZFCP_ERP_CONTINUES;
- struct zfcp_adapter *adapter = erp_action->adapter;
-
- debug_text_event(adapter->erp_dbf, 6, "a_mwinit");
- debug_event(adapter->erp_dbf, 6, &erp_action->action, sizeof (int));
- init_timer(&erp_action->timer);
- erp_action->timer.function = zfcp_erp_memwait_handler;
- erp_action->timer.data = (unsigned long) erp_action;
- erp_action->timer.expires = jiffies + ZFCP_ERP_MEMWAIT_TIMEOUT;
- add_timer(&erp_action->timer);
-
- return retval;
-}
-
-/*
- * function: zfcp_erp_adapter_failed
- *
- * purpose: sets the adapter and all underlying devices to ERP_FAILED
- *
- */
-void
-zfcp_erp_adapter_failed(struct zfcp_adapter *adapter)
-{
- zfcp_erp_modify_adapter_status(adapter,
- ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET);
- ZFCP_LOG_NORMAL("adapter erp failed on adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
- debug_text_event(adapter->erp_dbf, 2, "a_afail");
-}
-
-/*
- * function: zfcp_erp_port_failed
- *
- * purpose: sets the port and all underlying devices to ERP_FAILED
- *
- */
-void
-zfcp_erp_port_failed(struct zfcp_port *port)
-{
- zfcp_erp_modify_port_status(port,
- ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET);
-
- if (atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status))
- ZFCP_LOG_NORMAL("port erp failed (adapter %s, "
- "port d_id=0x%08x)\n",
- zfcp_get_busid_by_port(port), port->d_id);
- else
- ZFCP_LOG_NORMAL("port erp failed (adapter %s, wwpn=0x%016Lx)\n",
- zfcp_get_busid_by_port(port), port->wwpn);
-
- debug_text_event(port->adapter->erp_dbf, 2, "p_pfail");
- debug_event(port->adapter->erp_dbf, 2, &port->wwpn, sizeof (wwn_t));
-}
-
-/*
- * function: zfcp_erp_unit_failed
- *
- * purpose: sets the unit to ERP_FAILED
- *
- */
-void
-zfcp_erp_unit_failed(struct zfcp_unit *unit)
-{
- zfcp_erp_modify_unit_status(unit,
- ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET);
-
- ZFCP_LOG_NORMAL("unit erp failed on unit 0x%016Lx on port 0x%016Lx "
- " on adapter %s\n", unit->fcp_lun,
- unit->port->wwpn, zfcp_get_busid_by_unit(unit));
- debug_text_event(unit->port->adapter->erp_dbf, 2, "u_ufail");
- debug_event(unit->port->adapter->erp_dbf, 2,
- &unit->fcp_lun, sizeof (fcp_lun_t));
-}
-
-/*
- * function: zfcp_erp_strategy_check_target
- *
- * purpose: increments the erp action count on the device currently in
- * recovery if the action failed or resets the count in case of
- * success. If a maximum count is exceeded the device is marked
- * as ERP_FAILED.
- * The 'blocked' state of a target which has been recovered
- * successfully is reset.
- *
- * returns: ZFCP_ERP_CONTINUES - action continues (not considered)
- * ZFCP_ERP_SUCCEEDED - action finished successfully
- * ZFCP_ERP_EXIT - action failed and will not continue
- */
-static int
-zfcp_erp_strategy_check_target(struct zfcp_erp_action *erp_action, int result)
-{
- struct zfcp_adapter *adapter = erp_action->adapter;
- struct zfcp_port *port = erp_action->port;
- struct zfcp_unit *unit = erp_action->unit;
-
- debug_text_event(adapter->erp_dbf, 5, "a_stct_norm");
- debug_event(adapter->erp_dbf, 5, &erp_action->action, sizeof (int));
- debug_event(adapter->erp_dbf, 5, &result, sizeof (int));
-
- switch (erp_action->action) {
-
- case ZFCP_ERP_ACTION_REOPEN_UNIT:
- result = zfcp_erp_strategy_check_unit(unit, result);
- break;
-
- case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
- case ZFCP_ERP_ACTION_REOPEN_PORT:
- result = zfcp_erp_strategy_check_port(port, result);
- break;
-
- case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
- result = zfcp_erp_strategy_check_adapter(adapter, result);
- break;
- }
-
- return result;
-}
-
-static int
-zfcp_erp_strategy_statechange(int action,
- u32 status,
- struct zfcp_adapter *adapter,
- struct zfcp_port *port,
- struct zfcp_unit *unit, int retval)
-{
- debug_text_event(adapter->erp_dbf, 3, "a_stsc");
- debug_event(adapter->erp_dbf, 3, &action, sizeof (int));
-
- switch (action) {
-
- case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
- if (zfcp_erp_strategy_statechange_detected(&adapter->status,
- status)) {
- zfcp_erp_adapter_reopen_internal(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
- retval = ZFCP_ERP_EXIT;
- }
- break;
-
- case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
- case ZFCP_ERP_ACTION_REOPEN_PORT:
- if (zfcp_erp_strategy_statechange_detected(&port->status,
- status)) {
- zfcp_erp_port_reopen_internal(port, ZFCP_STATUS_COMMON_ERP_FAILED);
- retval = ZFCP_ERP_EXIT;
- }
- break;
-
- case ZFCP_ERP_ACTION_REOPEN_UNIT:
- if (zfcp_erp_strategy_statechange_detected(&unit->status,
- status)) {
- zfcp_erp_unit_reopen_internal(unit, ZFCP_STATUS_COMMON_ERP_FAILED);
- retval = ZFCP_ERP_EXIT;
- }
- break;
- }
-
- return retval;
-}
-
-static inline int
-zfcp_erp_strategy_statechange_detected(atomic_t * target_status, u32 erp_status)
-{
- return
- /* take it online */
- (atomic_test_mask(ZFCP_STATUS_COMMON_RUNNING, target_status) &&
- (ZFCP_STATUS_ERP_CLOSE_ONLY & erp_status)) ||
- /* take it offline */
- (!atomic_test_mask(ZFCP_STATUS_COMMON_RUNNING, target_status) &&
- !(ZFCP_STATUS_ERP_CLOSE_ONLY & erp_status));
-}
-
-static int
-zfcp_erp_strategy_check_unit(struct zfcp_unit *unit, int result)
-{
- debug_text_event(unit->port->adapter->erp_dbf, 5, "u_stct");
- debug_event(unit->port->adapter->erp_dbf, 5, &unit->fcp_lun,
- sizeof (fcp_lun_t));
-
- switch (result) {
- case ZFCP_ERP_SUCCEEDED :
- atomic_set(&unit->erp_counter, 0);
- zfcp_erp_unit_unblock(unit);
- break;
- case ZFCP_ERP_FAILED :
- atomic_inc(&unit->erp_counter);
- if (atomic_read(&unit->erp_counter) > ZFCP_MAX_ERPS)
- zfcp_erp_unit_failed(unit);
- break;
- case ZFCP_ERP_EXIT :
- /* nothing */
- break;
- }
-
- if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status)) {
- zfcp_erp_unit_block(unit, 0); /* for ZFCP_ERP_SUCCEEDED */
- result = ZFCP_ERP_EXIT;
- }
-
- return result;
-}
-
-static int
-zfcp_erp_strategy_check_port(struct zfcp_port *port, int result)
-{
- debug_text_event(port->adapter->erp_dbf, 5, "p_stct");
- debug_event(port->adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t));
-
- switch (result) {
- case ZFCP_ERP_SUCCEEDED :
- atomic_set(&port->erp_counter, 0);
- zfcp_erp_port_unblock(port);
- break;
- case ZFCP_ERP_FAILED :
- atomic_inc(&port->erp_counter);
- if (atomic_read(&port->erp_counter) > ZFCP_MAX_ERPS)
- zfcp_erp_port_failed(port);
- break;
- case ZFCP_ERP_EXIT :
- /* nothing */
- break;
- }
-
- if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) {
- zfcp_erp_port_block(port, 0); /* for ZFCP_ERP_SUCCEEDED */
- result = ZFCP_ERP_EXIT;
- }
-
- return result;
-}
-
-static int
-zfcp_erp_strategy_check_adapter(struct zfcp_adapter *adapter, int result)
-{
- debug_text_event(adapter->erp_dbf, 5, "a_stct");
-
- switch (result) {
- case ZFCP_ERP_SUCCEEDED :
- atomic_set(&adapter->erp_counter, 0);
- zfcp_erp_adapter_unblock(adapter);
- break;
- case ZFCP_ERP_FAILED :
- atomic_inc(&adapter->erp_counter);
- if (atomic_read(&adapter->erp_counter) > ZFCP_MAX_ERPS)
- zfcp_erp_adapter_failed(adapter);
- break;
- case ZFCP_ERP_EXIT :
- /* nothing */
- break;
- }
-
- if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) {
- zfcp_erp_adapter_block(adapter, 0); /* for ZFCP_ERP_SUCCEEDED */
- result = ZFCP_ERP_EXIT;
- }
-
- return result;
-}
-
-/*
- * function:
- *
- * purpose: remaining things in good cases,
- * escalation in bad cases
- *
- * returns:
- */
-static int
-zfcp_erp_strategy_followup_actions(int action,
- struct zfcp_adapter *adapter,
- struct zfcp_port *port,
- struct zfcp_unit *unit, int status)
-{
- debug_text_event(adapter->erp_dbf, 5, "a_stfol");
- debug_event(adapter->erp_dbf, 5, &action, sizeof (int));
-
- /* initiate follow-up actions depending on success of finished action */
- switch (action) {
-
- case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
- if (status == ZFCP_ERP_SUCCEEDED)
- zfcp_erp_port_reopen_all_internal(adapter, 0);
- else
- zfcp_erp_adapter_reopen_internal(adapter, 0);
- break;
-
- case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
- if (status == ZFCP_ERP_SUCCEEDED)
- zfcp_erp_port_reopen_internal(port, 0);
- else
- zfcp_erp_adapter_reopen_internal(adapter, 0);
- break;
-
- case ZFCP_ERP_ACTION_REOPEN_PORT:
- if (status == ZFCP_ERP_SUCCEEDED)
- zfcp_erp_unit_reopen_all_internal(port, 0);
- else
- zfcp_erp_port_forced_reopen_internal(port, 0);
- break;
-
- case ZFCP_ERP_ACTION_REOPEN_UNIT:
- if (status == ZFCP_ERP_SUCCEEDED) ; /* no further action */
- else
- zfcp_erp_port_reopen_internal(unit->port, 0);
- break;
- }
-
- return 0;
-}
-
-static int
-zfcp_erp_strategy_check_queues(struct zfcp_adapter *adapter)
-{
- unsigned long flags;
-
- read_lock_irqsave(&zfcp_data.config_lock, flags);
- read_lock(&adapter->erp_lock);
- if (list_empty(&adapter->erp_ready_head) &&
- list_empty(&adapter->erp_running_head)) {
- debug_text_event(adapter->erp_dbf, 4, "a_cq_wake");
- atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING,
- &adapter->status);
- wake_up(&adapter->erp_done_wqh);
- } else
- debug_text_event(adapter->erp_dbf, 5, "a_cq_notempty");
- read_unlock(&adapter->erp_lock);
- read_unlock_irqrestore(&zfcp_data.config_lock, flags);
-
- return 0;
-}
-
-/**
- * zfcp_erp_wait - wait for completion of error recovery on an adapter
- * @adapter: adapter for which to wait for completion of its error recovery
- * Return: 0
- */
-int
-zfcp_erp_wait(struct zfcp_adapter *adapter)
-{
- int retval = 0;
-
- wait_event(adapter->erp_done_wqh,
- !atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING,
- &adapter->status));
-
- return retval;
-}
-
-void
-zfcp_erp_modify_adapter_status(struct zfcp_adapter *adapter,
- u32 mask, int set_or_clear)
-{
- struct zfcp_port *port;
- u32 common_mask = mask & ZFCP_COMMON_FLAGS;
-
- if (set_or_clear == ZFCP_SET) {
- atomic_set_mask(mask, &adapter->status);
- debug_text_event(adapter->erp_dbf, 3, "a_mod_as_s");
- } else {
- atomic_clear_mask(mask, &adapter->status);
- if (mask & ZFCP_STATUS_COMMON_ERP_FAILED)
- atomic_set(&adapter->erp_counter, 0);
- debug_text_event(adapter->erp_dbf, 3, "a_mod_as_c");
- }
- debug_event(adapter->erp_dbf, 3, &mask, sizeof (u32));
-
- /* Deal with all underlying devices, only pass common_mask */
- if (common_mask)
- list_for_each_entry(port, &adapter->port_list_head, list)
- zfcp_erp_modify_port_status(port, common_mask,
- set_or_clear);
-}
-
-/*
- * function: zfcp_erp_modify_port_status
- *
- * purpose: sets the port and all underlying devices to ERP_FAILED
- *
- */
-void
-zfcp_erp_modify_port_status(struct zfcp_port *port, u32 mask, int set_or_clear)
-{
- struct zfcp_unit *unit;
- u32 common_mask = mask & ZFCP_COMMON_FLAGS;
-
- if (set_or_clear == ZFCP_SET) {
- atomic_set_mask(mask, &port->status);
- debug_text_event(port->adapter->erp_dbf, 3, "p_mod_ps_s");
- } else {
- atomic_clear_mask(mask, &port->status);
- if (mask & ZFCP_STATUS_COMMON_ERP_FAILED)
- atomic_set(&port->erp_counter, 0);
- debug_text_event(port->adapter->erp_dbf, 3, "p_mod_ps_c");
- }
- debug_event(port->adapter->erp_dbf, 3, &port->wwpn, sizeof (wwn_t));
- debug_event(port->adapter->erp_dbf, 3, &mask, sizeof (u32));
-
- /* Modify status of all underlying devices, only pass common mask */
- if (common_mask)
- list_for_each_entry(unit, &port->unit_list_head, list)
- zfcp_erp_modify_unit_status(unit, common_mask,
- set_or_clear);
-}
-
-/*
- * function: zfcp_erp_modify_unit_status
- *
- * purpose: sets the unit to ERP_FAILED
- *
- */
-void
-zfcp_erp_modify_unit_status(struct zfcp_unit *unit, u32 mask, int set_or_clear)
-{
- if (set_or_clear == ZFCP_SET) {
- atomic_set_mask(mask, &unit->status);
- debug_text_event(unit->port->adapter->erp_dbf, 3, "u_mod_us_s");
- } else {
- atomic_clear_mask(mask, &unit->status);
- if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) {
- atomic_set(&unit->erp_counter, 0);
- }
- debug_text_event(unit->port->adapter->erp_dbf, 3, "u_mod_us_c");
- }
- debug_event(unit->port->adapter->erp_dbf, 3, &unit->fcp_lun,
- sizeof (fcp_lun_t));
- debug_event(unit->port->adapter->erp_dbf, 3, &mask, sizeof (u32));
-}
-
-/*
- * function:
- *
- * purpose: Wrappper for zfcp_erp_port_reopen_all_internal
- * used to ensure the correct locking
- *
- * returns: 0 - initiated action succesfully
- * <0 - failed to initiate action
+/**
+ * zfcp_erp_timeout_handler - Trigger ERP action from timed out ERP request
+ * @data: ERP action (from timer data)
*/
-int
-zfcp_erp_port_reopen_all(struct zfcp_adapter *adapter, int clear_mask)
-{
- int retval;
- unsigned long flags;
-
- read_lock_irqsave(&zfcp_data.config_lock, flags);
- write_lock(&adapter->erp_lock);
- retval = zfcp_erp_port_reopen_all_internal(adapter, clear_mask);
- write_unlock(&adapter->erp_lock);
- read_unlock_irqrestore(&zfcp_data.config_lock, flags);
-
- return retval;
-}
-
-static int
-zfcp_erp_port_reopen_all_internal(struct zfcp_adapter *adapter, int clear_mask)
+void zfcp_erp_timeout_handler(unsigned long data)
{
- int retval = 0;
- struct zfcp_port *port;
-
- list_for_each_entry(port, &adapter->port_list_head, list)
- if (!atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status))
- zfcp_erp_port_reopen_internal(port, clear_mask);
-
- return retval;
+ struct zfcp_erp_action *act = (struct zfcp_erp_action *) data;
+ zfcp_erp_notify(act, ZFCP_STATUS_ERP_TIMEDOUT);
}
-/*
- * function:
- *
- * purpose:
- *
- * returns: FIXME
- */
-static int
-zfcp_erp_unit_reopen_all_internal(struct zfcp_port *port, int clear_mask)
+static void zfcp_erp_memwait_handler(unsigned long data)
{
- int retval = 0;
- struct zfcp_unit *unit;
-
- list_for_each_entry(unit, &port->unit_list_head, list)
- zfcp_erp_unit_reopen_internal(unit, clear_mask);
-
- return retval;
+ zfcp_erp_notify((struct zfcp_erp_action *)data, 0);
}
-/*
- * function:
- *
- * purpose: this routine executes the 'Reopen Adapter' action
- * (the entire action is processed synchronously, since
- * there are no actions which might be run concurrently
- * per definition)
- *
- * returns: ZFCP_ERP_SUCCEEDED - action finished successfully
- * ZFCP_ERP_FAILED - action finished unsuccessfully
- */
-static int
-zfcp_erp_adapter_strategy(struct zfcp_erp_action *erp_action)
+static void zfcp_erp_strategy_memwait(struct zfcp_erp_action *erp_action)
{
- int retval;
- struct zfcp_adapter *adapter = erp_action->adapter;
-
- retval = zfcp_erp_adapter_strategy_close(erp_action);
- if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY)
- retval = ZFCP_ERP_EXIT;
- else
- retval = zfcp_erp_adapter_strategy_open(erp_action);
-
- debug_text_event(adapter->erp_dbf, 3, "a_ast/ret");
- debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int));
- debug_event(adapter->erp_dbf, 3, &retval, sizeof (int));
-
- if (retval == ZFCP_ERP_FAILED) {
- ZFCP_LOG_INFO("Waiting to allow the adapter %s "
- "to recover itself\n",
- zfcp_get_busid_by_adapter(adapter));
- msleep(jiffies_to_msecs(ZFCP_TYPE2_RECOVERY_TIME));
- }
-
- return retval;
+ init_timer(&erp_action->timer);
+ erp_action->timer.function = zfcp_erp_memwait_handler;
+ erp_action->timer.data = (unsigned long) erp_action;
+ erp_action->timer.expires = jiffies + HZ;
+ add_timer(&erp_action->timer);
}
-/*
- * function:
- *
- * purpose:
- *
- * returns: ZFCP_ERP_SUCCEEDED - action finished successfully
- * ZFCP_ERP_FAILED - action finished unsuccessfully
- */
-static int
-zfcp_erp_adapter_strategy_close(struct zfcp_erp_action *erp_action)
+static void _zfcp_erp_port_reopen_all(struct zfcp_adapter *adapter,
+ int clear, char *id, void *ref)
{
- int retval;
-
- atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING,
- &erp_action->adapter->status);
- retval = zfcp_erp_adapter_strategy_generic(erp_action, 1);
- atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING,
- &erp_action->adapter->status);
+ struct zfcp_port *port;
- return retval;
+ read_lock(&adapter->port_list_lock);
+ list_for_each_entry(port, &adapter->port_list, list)
+ _zfcp_erp_port_reopen(port, clear, id, ref);
+ read_unlock(&adapter->port_list_lock);
}
-/*
- * function:
- *
- * purpose:
- *
- * returns: ZFCP_ERP_SUCCEEDED - action finished successfully
- * ZFCP_ERP_FAILED - action finished unsuccessfully
- */
-static int
-zfcp_erp_adapter_strategy_open(struct zfcp_erp_action *erp_action)
+static void _zfcp_erp_unit_reopen_all(struct zfcp_port *port, int clear,
+ char *id, void *ref)
{
- int retval;
-
- atomic_set_mask(ZFCP_STATUS_COMMON_OPENING,
- &erp_action->adapter->status);
- retval = zfcp_erp_adapter_strategy_generic(erp_action, 0);
- atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING,
- &erp_action->adapter->status);
+ struct zfcp_unit *unit;
- return retval;
+ read_lock(&port->unit_list_lock);
+ list_for_each_entry(unit, &port->unit_list, list)
+ _zfcp_erp_unit_reopen(unit, clear, id, ref);
+ read_unlock(&port->unit_list_lock);
}
-/*
- * function: zfcp_register_adapter
- *
- * purpose: allocate the irq associated with this devno and register
- * the FSF adapter with the SCSI stack
- *
- * returns:
- */
-static int
-zfcp_erp_adapter_strategy_generic(struct zfcp_erp_action *erp_action, int close)
+static void zfcp_erp_strategy_followup_failed(struct zfcp_erp_action *act)
{
- int retval = ZFCP_ERP_SUCCEEDED;
-
- if (close)
- goto close_only;
-
- retval = zfcp_erp_adapter_strategy_open_qdio(erp_action);
- if (retval != ZFCP_ERP_SUCCEEDED)
- goto failed_qdio;
-
- retval = zfcp_erp_adapter_strategy_open_fsf(erp_action);
- if (retval != ZFCP_ERP_SUCCEEDED)
- goto failed_openfcp;
-
- atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &erp_action->adapter->status);
- goto out;
-
- close_only:
- atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
- &erp_action->adapter->status);
-
- failed_openfcp:
- zfcp_erp_adapter_strategy_close_qdio(erp_action);
- zfcp_erp_adapter_strategy_close_fsf(erp_action);
- failed_qdio:
- out:
- return retval;
+ switch (act->action) {
+ case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
+ _zfcp_erp_adapter_reopen(act->adapter, 0, "ersff_1", NULL);
+ break;
+ case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
+ _zfcp_erp_port_forced_reopen(act->port, 0, "ersff_2", NULL);
+ break;
+ case ZFCP_ERP_ACTION_REOPEN_PORT:
+ _zfcp_erp_port_reopen(act->port, 0, "ersff_3", NULL);
+ break;
+ case ZFCP_ERP_ACTION_REOPEN_UNIT:
+ _zfcp_erp_unit_reopen(act->unit, 0, "ersff_4", NULL);
+ break;
+ }
}
-/*
- * function: zfcp_qdio_init
- *
- * purpose: setup QDIO operation for specified adapter
- *
- * returns: 0 - successful setup
- * !0 - failed setup
- */
-int
-zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *erp_action)
+static void zfcp_erp_strategy_followup_success(struct zfcp_erp_action *act)
{
- int retval;
- int i;
- volatile struct qdio_buffer_element *sbale;
- struct zfcp_adapter *adapter = erp_action->adapter;
-
- if (atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) {
- ZFCP_LOG_NORMAL("bug: second attempt to set up QDIO on "
- "adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
- goto failed_sanity;
- }
-
- if (qdio_establish(&adapter->qdio_init_data) != 0) {
- ZFCP_LOG_INFO("error: establishment of QDIO queues failed "
- "on adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
- goto failed_qdio_establish;
- }
- debug_text_event(adapter->erp_dbf, 3, "qdio_est");
-
- if (qdio_activate(adapter->ccw_device, 0) != 0) {
- ZFCP_LOG_INFO("error: activation of QDIO queues failed "
- "on adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
- goto failed_qdio_activate;
- }
- debug_text_event(adapter->erp_dbf, 3, "qdio_act");
-
- /*
- * put buffers into response queue,
- */
- for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
- sbale = &(adapter->response_queue.buffer[i]->element[0]);
- sbale->length = 0;
- sbale->flags = SBAL_FLAGS_LAST_ENTRY;
- sbale->addr = 0;
- }
-
- ZFCP_LOG_TRACE("calling do_QDIO on adapter %s (flags=0x%x, "
- "queue_no=%i, index_in_queue=%i, count=%i)\n",
- zfcp_get_busid_by_adapter(adapter),
- QDIO_FLAG_SYNC_INPUT, 0, 0, QDIO_MAX_BUFFERS_PER_Q);
-
- retval = do_QDIO(adapter->ccw_device,
- QDIO_FLAG_SYNC_INPUT,
- 0, 0, QDIO_MAX_BUFFERS_PER_Q, NULL);
-
- if (retval) {
- ZFCP_LOG_NORMAL("bug: setup of QDIO failed (retval=%d)\n",
- retval);
- goto failed_do_qdio;
- } else {
- adapter->response_queue.free_index = 0;
- atomic_set(&adapter->response_queue.free_count, 0);
- ZFCP_LOG_DEBUG("%i buffers successfully enqueued to "
- "response queue\n", QDIO_MAX_BUFFERS_PER_Q);
+ switch (act->action) {
+ case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
+ _zfcp_erp_port_reopen_all(act->adapter, 0, "ersfs_1", NULL);
+ break;
+ case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
+ _zfcp_erp_port_reopen(act->port, 0, "ersfs_2", NULL);
+ break;
+ case ZFCP_ERP_ACTION_REOPEN_PORT:
+ _zfcp_erp_unit_reopen_all(act->port, 0, "ersfs_3", NULL);
+ break;
}
- /* set index of first avalable SBALS / number of available SBALS */
- adapter->request_queue.free_index = 0;
- atomic_set(&adapter->request_queue.free_count, QDIO_MAX_BUFFERS_PER_Q);
- adapter->request_queue.distance_from_int = 0;
-
- /* initialize waitqueue used to wait for free SBALs in requests queue */
- init_waitqueue_head(&adapter->request_wq);
-
- /* ok, we did it - skip all cleanups for different failures */
- atomic_set_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status);
- retval = ZFCP_ERP_SUCCEEDED;
- goto out;
-
- failed_do_qdio:
- /* NOP */
-
- failed_qdio_activate:
- debug_text_event(adapter->erp_dbf, 3, "qdio_down1a");
- while (qdio_shutdown(adapter->ccw_device,
- QDIO_FLAG_CLEANUP_USING_CLEAR) == -EINPROGRESS)
- msleep(1000);
- debug_text_event(adapter->erp_dbf, 3, "qdio_down1b");
-
- failed_qdio_establish:
- failed_sanity:
- retval = ZFCP_ERP_FAILED;
-
- out:
- return retval;
}
-/*
- * function: zfcp_qdio_cleanup
- *
- * purpose: cleans up QDIO operation for the specified adapter
- *
- * returns: 0 - successful cleanup
- * !0 - failed cleanup
- */
-int
-zfcp_erp_adapter_strategy_close_qdio(struct zfcp_erp_action *erp_action)
+static void zfcp_erp_wakeup(struct zfcp_adapter *adapter)
{
- int retval = ZFCP_ERP_SUCCEEDED;
- int first_used;
- int used_count;
- struct zfcp_adapter *adapter = erp_action->adapter;
-
- if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) {
- ZFCP_LOG_DEBUG("error: attempt to shut down inactive QDIO "
- "queues on adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
- retval = ZFCP_ERP_FAILED;
- goto out;
- }
+ unsigned long flags;
- /*
- * Get queue_lock and clear QDIOUP flag. Thus it's guaranteed that
- * do_QDIO won't be called while qdio_shutdown is in progress.
- */
-
- write_lock_irq(&adapter->request_queue.queue_lock);
- atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status);
- write_unlock_irq(&adapter->request_queue.queue_lock);
-
- debug_text_event(adapter->erp_dbf, 3, "qdio_down2a");
- while (qdio_shutdown(adapter->ccw_device,
- QDIO_FLAG_CLEANUP_USING_CLEAR) == -EINPROGRESS)
- msleep(1000);
- debug_text_event(adapter->erp_dbf, 3, "qdio_down2b");
-
- /*
- * First we had to stop QDIO operation.
- * Now it is safe to take the following actions.
- */
-
- /* Cleanup only necessary when there are unacknowledged buffers */
- if (atomic_read(&adapter->request_queue.free_count)
- < QDIO_MAX_BUFFERS_PER_Q) {
- first_used = (adapter->request_queue.free_index +
- atomic_read(&adapter->request_queue.free_count))
- % QDIO_MAX_BUFFERS_PER_Q;
- used_count = QDIO_MAX_BUFFERS_PER_Q -
- atomic_read(&adapter->request_queue.free_count);
- zfcp_qdio_zero_sbals(adapter->request_queue.buffer,
- first_used, used_count);
+ read_lock_irqsave(&adapter->erp_lock, flags);
+ if (list_empty(&adapter->erp_ready_head) &&
+ list_empty(&adapter->erp_running_head)) {
+ atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING,
+ &adapter->status);
+ wake_up(&adapter->erp_done_wqh);
}
- adapter->response_queue.free_index = 0;
- atomic_set(&adapter->response_queue.free_count, 0);
- adapter->request_queue.free_index = 0;
- atomic_set(&adapter->request_queue.free_count, 0);
- adapter->request_queue.distance_from_int = 0;
- out:
- return retval;
+ read_unlock_irqrestore(&adapter->erp_lock, flags);
}
-static int
-zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *erp_action)
+static int zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *act)
{
- int retval;
-
- retval = zfcp_erp_adapter_strategy_open_fsf_xconfig(erp_action);
- if (retval == ZFCP_ERP_FAILED)
- return ZFCP_ERP_FAILED;
+ struct zfcp_qdio *qdio = act->adapter->qdio;
- retval = zfcp_erp_adapter_strategy_open_fsf_xport(erp_action);
- if (retval == ZFCP_ERP_FAILED)
+ if (zfcp_qdio_open(qdio))
return ZFCP_ERP_FAILED;
+ init_waitqueue_head(&qdio->req_q_wq);
+ atomic_set_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &act->adapter->status);
+ return ZFCP_ERP_SUCCEEDED;
+}
- return zfcp_erp_adapter_strategy_open_fsf_statusread(erp_action);
+static void zfcp_erp_enqueue_ptp_port(struct zfcp_adapter *adapter)
+{
+ struct zfcp_port *port;
+ port = zfcp_port_enqueue(adapter, adapter->peer_wwpn, 0,
+ adapter->peer_d_id);
+ if (IS_ERR(port)) /* error or port already attached */
+ return;
+ _zfcp_erp_port_reopen(port, 0, "ereptp1", NULL);
}
-static int
-zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *erp_action)
+static int zfcp_erp_adapter_strat_fsf_xconf(struct zfcp_erp_action *erp_action)
{
- int retval = ZFCP_ERP_SUCCEEDED;
int retries;
- int sleep = ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP;
+ int sleep = 1;
struct zfcp_adapter *adapter = erp_action->adapter;
atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status);
- for (retries = ZFCP_EXCHANGE_CONFIG_DATA_RETRIES; retries; retries--) {
+ for (retries = 7; retries; retries--) {
atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
&adapter->status);
- ZFCP_LOG_DEBUG("Doing exchange config data\n");
- write_lock(&adapter->erp_lock);
+ write_lock_irq(&adapter->erp_lock);
zfcp_erp_action_to_running(erp_action);
- write_unlock(&adapter->erp_lock);
- zfcp_erp_timeout_init(erp_action);
+ write_unlock_irq(&adapter->erp_lock);
if (zfcp_fsf_exchange_config_data(erp_action)) {
- retval = ZFCP_ERP_FAILED;
- debug_text_event(adapter->erp_dbf, 5, "a_fstx_xf");
- ZFCP_LOG_INFO("error: initiation of exchange of "
- "configuration data failed for "
- "adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
- break;
+ atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
+ &adapter->status);
+ return ZFCP_ERP_FAILED;
}
- debug_text_event(adapter->erp_dbf, 6, "a_fstx_xok");
- ZFCP_LOG_DEBUG("Xchange underway\n");
-
- /*
- * Why this works:
- * Both the normal completion handler as well as the timeout
- * handler will do an 'up' when the 'exchange config data'
- * request completes or times out. Thus, the signal to go on
- * won't be lost utilizing this semaphore.
- * Furthermore, this 'adapter_reopen' action is
- * guaranteed to be the only action being there (highest action
- * which prevents other actions from being created).
- * Resulting from that, the wake signal recognized here
- * _must_ be the one belonging to the 'exchange config
- * data' request.
- */
- down(&adapter->erp_ready_sem);
- if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) {
- ZFCP_LOG_INFO("error: exchange of configuration data "
- "for adapter %s timed out\n",
- zfcp_get_busid_by_adapter(adapter));
+
+ zfcp_dbf_rec_thread_lock("erasfx1", adapter->dbf);
+ wait_event(adapter->erp_ready_wq,
+ !list_empty(&adapter->erp_ready_head));
+ zfcp_dbf_rec_thread_lock("erasfx2", adapter->dbf);
+ if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT)
break;
- }
- if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
- &adapter->status))
+ if (!(atomic_read(&adapter->status) &
+ ZFCP_STATUS_ADAPTER_HOST_CON_INIT))
break;
- ZFCP_LOG_DEBUG("host connection still initialising... "
- "waiting and retrying...\n");
- /* sleep a little bit before retry */
- msleep(jiffies_to_msecs(sleep));
+ ssleep(sleep);
sleep *= 2;
}
- if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
- &adapter->status)) {
- ZFCP_LOG_INFO("error: exchange of configuration data for "
- "adapter %s failed\n",
- zfcp_get_busid_by_adapter(adapter));
- retval = ZFCP_ERP_FAILED;
- }
-
- return retval;
-}
-
-static int
-zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *erp_action)
-{
- int ret;
- struct zfcp_adapter *adapter;
-
- adapter = erp_action->adapter;
- atomic_clear_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
-
- write_lock(&adapter->erp_lock);
- zfcp_erp_action_to_running(erp_action);
- write_unlock(&adapter->erp_lock);
+ atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
+ &adapter->status);
- zfcp_erp_timeout_init(erp_action);
- ret = zfcp_fsf_exchange_port_data(erp_action, adapter, NULL);
- if (ret == -EOPNOTSUPP) {
- debug_text_event(adapter->erp_dbf, 3, "a_xport_notsupp");
- return ZFCP_ERP_SUCCEEDED;
- } else if (ret) {
- debug_text_event(adapter->erp_dbf, 3, "a_xport_failed");
+ if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_XCONFIG_OK))
return ZFCP_ERP_FAILED;
- }
- debug_text_event(adapter->erp_dbf, 6, "a_xport_ok");
-
- ret = ZFCP_ERP_SUCCEEDED;
- down(&adapter->erp_ready_sem);
- if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) {
- ZFCP_LOG_INFO("error: exchange port data timed out (adapter "
- "%s)\n", zfcp_get_busid_by_adapter(adapter));
- ret = ZFCP_ERP_FAILED;
- }
- if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status)) {
- ZFCP_LOG_INFO("error: exchange port data failed (adapter "
- "%s\n", zfcp_get_busid_by_adapter(adapter));
- ret = ZFCP_ERP_FAILED;
- }
-
- return ret;
-}
-
-static int
-zfcp_erp_adapter_strategy_open_fsf_statusread(struct zfcp_erp_action
- *erp_action)
-{
- int retval = ZFCP_ERP_SUCCEEDED;
- int temp_ret;
- struct zfcp_adapter *adapter = erp_action->adapter;
- int i;
-
- adapter->status_read_failed = 0;
- for (i = 0; i < ZFCP_STATUS_READS_RECOM; i++) {
- temp_ret = zfcp_fsf_status_read(adapter, ZFCP_WAIT_FOR_SBAL);
- if (temp_ret < 0) {
- ZFCP_LOG_INFO("error: set-up of unsolicited status "
- "notification failed on adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
- retval = ZFCP_ERP_FAILED;
- i--;
- break;
- }
- }
-
- return retval;
-}
-
-/*
- * function: zfcp_fsf_cleanup
- *
- * purpose: cleanup FSF operation for specified adapter
- *
- * returns: 0 - FSF operation successfully cleaned up
- * !0 - failed to cleanup FSF operation for this adapter
- */
-static int
-zfcp_erp_adapter_strategy_close_fsf(struct zfcp_erp_action *erp_action)
-{
- int retval = ZFCP_ERP_SUCCEEDED;
- struct zfcp_adapter *adapter = erp_action->adapter;
-
- /*
- * wake waiting initiators of requests,
- * return SCSI commands (with error status),
- * clean up all requests (synchronously)
- */
- zfcp_fsf_req_dismiss_all(adapter);
- /* reset FSF request sequence number */
- adapter->fsf_req_seq_no = 0;
- /* all ports and units are closed */
- zfcp_erp_modify_adapter_status(adapter,
- ZFCP_STATUS_COMMON_OPEN, ZFCP_CLEAR);
-
- return retval;
-}
-
-/*
- * function:
- *
- * purpose: this routine executes the 'Reopen Physical Port' action
- *
- * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously)
- * ZFCP_ERP_SUCCEEDED - action finished successfully
- * ZFCP_ERP_FAILED - action finished unsuccessfully
- */
-static int
-zfcp_erp_port_forced_strategy(struct zfcp_erp_action *erp_action)
-{
- int retval = ZFCP_ERP_FAILED;
- struct zfcp_port *port = erp_action->port;
- struct zfcp_adapter *adapter = erp_action->adapter;
- switch (erp_action->step) {
-
- /*
- * FIXME:
- * the ULP spec. begs for waiting for oustanding commands
- */
- case ZFCP_ERP_STEP_UNINITIALIZED:
- zfcp_erp_port_strategy_clearstati(port);
- /*
- * it would be sufficient to test only the normal open flag
- * since the phys. open flag cannot be set if the normal
- * open flag is unset - however, this is for readabilty ...
- */
- if (atomic_test_mask((ZFCP_STATUS_PORT_PHYS_OPEN |
- ZFCP_STATUS_COMMON_OPEN),
- &port->status)) {
- ZFCP_LOG_DEBUG("port 0x%016Lx is open -> trying "
- "close physical\n", port->wwpn);
- retval =
- zfcp_erp_port_forced_strategy_close(erp_action);
- } else
- retval = ZFCP_ERP_FAILED;
- break;
-
- case ZFCP_ERP_STEP_PHYS_PORT_CLOSING:
- if (atomic_test_mask(ZFCP_STATUS_PORT_PHYS_OPEN,
- &port->status)) {
- ZFCP_LOG_DEBUG("close physical failed for port "
- "0x%016Lx\n", port->wwpn);
- retval = ZFCP_ERP_FAILED;
- } else
- retval = ZFCP_ERP_SUCCEEDED;
- break;
- }
-
- debug_text_event(adapter->erp_dbf, 3, "p_pfst/ret");
- debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof (wwn_t));
- debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int));
- debug_event(adapter->erp_dbf, 3, &retval, sizeof (int));
-
- return retval;
-}
-
-/*
- * function:
- *
- * purpose: this routine executes the 'Reopen Port' action
- *
- * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously)
- * ZFCP_ERP_SUCCEEDED - action finished successfully
- * ZFCP_ERP_FAILED - action finished unsuccessfully
- */
-static int
-zfcp_erp_port_strategy(struct zfcp_erp_action *erp_action)
-{
- int retval = ZFCP_ERP_FAILED;
- struct zfcp_port *port = erp_action->port;
- struct zfcp_adapter *adapter = erp_action->adapter;
-
- switch (erp_action->step) {
-
- /*
- * FIXME:
- * the ULP spec. begs for waiting for oustanding commands
- */
- case ZFCP_ERP_STEP_UNINITIALIZED:
- zfcp_erp_port_strategy_clearstati(port);
- if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &port->status)) {
- ZFCP_LOG_DEBUG("port 0x%016Lx is open -> trying "
- "close\n", port->wwpn);
- retval = zfcp_erp_port_strategy_close(erp_action);
- goto out;
- } /* else it's already closed, open it */
- break;
-
- case ZFCP_ERP_STEP_PORT_CLOSING:
- if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &port->status)) {
- ZFCP_LOG_DEBUG("close failed for port 0x%016Lx\n",
- port->wwpn);
- retval = ZFCP_ERP_FAILED;
- goto out;
- } /* else it's closed now, open it */
- break;
- }
- if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY)
- retval = ZFCP_ERP_EXIT;
- else
- retval = zfcp_erp_port_strategy_open(erp_action);
-
- out:
- debug_text_event(adapter->erp_dbf, 3, "p_pst/ret");
- debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof (wwn_t));
- debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int));
- debug_event(adapter->erp_dbf, 3, &retval, sizeof (int));
-
- return retval;
-}
+ if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP)
+ zfcp_erp_enqueue_ptp_port(adapter);
-static int
-zfcp_erp_port_strategy_open(struct zfcp_erp_action *erp_action)
-{
- int retval;
-
- if (atomic_test_mask(ZFCP_STATUS_PORT_WKA,
- &erp_action->port->status))
- retval = zfcp_erp_port_strategy_open_nameserver(erp_action);
- else
- retval = zfcp_erp_port_strategy_open_common(erp_action);
-
- return retval;
+ return ZFCP_ERP_SUCCEEDED;
}
-static int
-zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *erp_action)
+static int zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *act)
{
- int retval = 0;
- struct zfcp_adapter *adapter = erp_action->adapter;
- struct zfcp_port *port = erp_action->port;
+ int ret;
+ struct zfcp_adapter *adapter = act->adapter;
- switch (erp_action->step) {
+ write_lock_irq(&adapter->erp_lock);
+ zfcp_erp_action_to_running(act);
+ write_unlock_irq(&adapter->erp_lock);
- case ZFCP_ERP_STEP_UNINITIALIZED:
- case ZFCP_ERP_STEP_PHYS_PORT_CLOSING:
- case ZFCP_ERP_STEP_PORT_CLOSING:
- if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP) {
- if (port->wwpn != adapter->peer_wwpn) {
- ZFCP_LOG_NORMAL("Failed to open port 0x%016Lx "
- "on adapter %s.\nPeer WWPN "
- "0x%016Lx does not match\n",
- port->wwpn,
- zfcp_get_busid_by_adapter(adapter),
- adapter->peer_wwpn);
- zfcp_erp_port_failed(port);
- retval = ZFCP_ERP_FAILED;
- break;
- }
- port->d_id = adapter->peer_d_id;
- atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status);
- retval = zfcp_erp_port_strategy_open_port(erp_action);
- break;
- }
- if (!(adapter->nameserver_port)) {
- retval = zfcp_nameserver_enqueue(adapter);
- if (retval != 0) {
- ZFCP_LOG_NORMAL("error: nameserver port "
- "unavailable for adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
- retval = ZFCP_ERP_FAILED;
- break;
- }
- }
- if (!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
- &adapter->nameserver_port->status)) {
- ZFCP_LOG_DEBUG("nameserver port is not open -> open "
- "nameserver port\n");
- /* nameserver port may live again */
- atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING,
- &adapter->nameserver_port->status);
- if (zfcp_erp_port_reopen(adapter->nameserver_port, 0)
- >= 0) {
- erp_action->step =
- ZFCP_ERP_STEP_NAMESERVER_OPEN;
- retval = ZFCP_ERP_CONTINUES;
- } else
- retval = ZFCP_ERP_FAILED;
- break;
- }
- /* else nameserver port is already open, fall through */
- case ZFCP_ERP_STEP_NAMESERVER_OPEN:
- if (!atomic_test_mask(ZFCP_STATUS_COMMON_OPEN,
- &adapter->nameserver_port->status)) {
- ZFCP_LOG_DEBUG("open failed for nameserver port\n");
- retval = ZFCP_ERP_FAILED;
- } else {
- ZFCP_LOG_DEBUG("nameserver port is open -> "
- "nameserver look-up for port 0x%016Lx\n",
- port->wwpn);
- retval = zfcp_erp_port_strategy_open_common_lookup
- (erp_action);
- }
- break;
+ ret = zfcp_fsf_exchange_port_data(act);
+ if (ret == -EOPNOTSUPP)
+ return ZFCP_ERP_SUCCEEDED;
+ if (ret)
+ return ZFCP_ERP_FAILED;
- case ZFCP_ERP_STEP_NAMESERVER_LOOKUP:
- if (!atomic_test_mask(ZFCP_STATUS_PORT_DID_DID, &port->status)) {
- if (atomic_test_mask
- (ZFCP_STATUS_PORT_INVALID_WWPN, &port->status)) {
- ZFCP_LOG_DEBUG("nameserver look-up failed "
- "for port 0x%016Lx "
- "(misconfigured WWPN?)\n",
- port->wwpn);
- zfcp_erp_port_failed(port);
- retval = ZFCP_ERP_EXIT;
- } else {
- ZFCP_LOG_DEBUG("nameserver look-up failed for "
- "port 0x%016Lx\n", port->wwpn);
- retval = ZFCP_ERP_FAILED;
- }
- } else {
- ZFCP_LOG_DEBUG("port 0x%016Lx has d_id=0x%08x -> "
- "trying open\n", port->wwpn, port->d_id);
- retval = zfcp_erp_port_strategy_open_port(erp_action);
- }
- break;
+ zfcp_dbf_rec_thread_lock("erasox1", adapter->dbf);
+ wait_event(adapter->erp_ready_wq,
+ !list_empty(&adapter->erp_ready_head));
+ zfcp_dbf_rec_thread_lock("erasox2", adapter->dbf);
+ if (act->status & ZFCP_STATUS_ERP_TIMEDOUT)
+ return ZFCP_ERP_FAILED;
- case ZFCP_ERP_STEP_PORT_OPENING:
- /* D_ID might have changed during open */
- if (atomic_test_mask((ZFCP_STATUS_COMMON_OPEN |
- ZFCP_STATUS_PORT_DID_DID),
- &port->status)) {
- ZFCP_LOG_DEBUG("port 0x%016Lx is open\n", port->wwpn);
- retval = ZFCP_ERP_SUCCEEDED;
- } else {
- ZFCP_LOG_DEBUG("open failed for port 0x%016Lx\n",
- port->wwpn);
- retval = ZFCP_ERP_FAILED;
- }
- break;
+ return ZFCP_ERP_SUCCEEDED;
+}
- default:
- ZFCP_LOG_NORMAL("bug: unknown erp step 0x%08x\n",
- erp_action->step);
- retval = ZFCP_ERP_FAILED;
- }
+static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *act)
+{
+ if (zfcp_erp_adapter_strat_fsf_xconf(act) == ZFCP_ERP_FAILED)
+ return ZFCP_ERP_FAILED;
- return retval;
+ if (zfcp_erp_adapter_strategy_open_fsf_xport(act) == ZFCP_ERP_FAILED)
+ return ZFCP_ERP_FAILED;
+
+ atomic_set(&act->adapter->stat_miss, act->adapter->stat_read_buf_num);
+ if (zfcp_status_read_refill(act->adapter))
+ return ZFCP_ERP_FAILED;
+
+ return ZFCP_ERP_SUCCEEDED;
}
-static int
-zfcp_erp_port_strategy_open_nameserver(struct zfcp_erp_action *erp_action)
+static void zfcp_erp_adapter_strategy_close(struct zfcp_erp_action *act)
{
- int retval;
- struct zfcp_port *port = erp_action->port;
+ struct zfcp_adapter *adapter = act->adapter;
- switch (erp_action->step) {
+ /* close queues to ensure that buffers are not accessed by adapter */
+ zfcp_qdio_close(adapter->qdio);
+ zfcp_fsf_req_dismiss_all(adapter);
+ adapter->fsf_req_seq_no = 0;
+ zfcp_fc_wka_ports_force_offline(adapter->gs);
+ /* all ports and units are closed */
+ zfcp_erp_modify_adapter_status(adapter, "erascl1", NULL,
+ ZFCP_STATUS_COMMON_OPEN, ZFCP_CLEAR);
- case ZFCP_ERP_STEP_UNINITIALIZED:
- case ZFCP_ERP_STEP_PHYS_PORT_CLOSING:
- case ZFCP_ERP_STEP_PORT_CLOSING:
- ZFCP_LOG_DEBUG("port 0x%016Lx has d_id=0x%08x -> trying open\n",
- port->wwpn, port->d_id);
- retval = zfcp_erp_port_strategy_open_port(erp_action);
- break;
+ atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK |
+ ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
+}
- case ZFCP_ERP_STEP_PORT_OPENING:
- if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &port->status)) {
- ZFCP_LOG_DEBUG("WKA port is open\n");
- retval = ZFCP_ERP_SUCCEEDED;
- } else {
- ZFCP_LOG_DEBUG("open failed for WKA port\n");
- retval = ZFCP_ERP_FAILED;
- }
- /* this is needed anyway (dont care for retval of wakeup) */
- ZFCP_LOG_DEBUG("continue other open port operations\n");
- zfcp_erp_port_strategy_open_nameserver_wakeup(erp_action);
- break;
+static int zfcp_erp_adapter_strategy_open(struct zfcp_erp_action *act)
+{
+ struct zfcp_adapter *adapter = act->adapter;
- default:
- ZFCP_LOG_NORMAL("bug: unknown erp step 0x%08x\n",
- erp_action->step);
- retval = ZFCP_ERP_FAILED;
+ if (zfcp_erp_adapter_strategy_open_qdio(act)) {
+ atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK |
+ ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
+ &adapter->status);
+ return ZFCP_ERP_FAILED;
}
- return retval;
+ if (zfcp_erp_adapter_strategy_open_fsf(act)) {
+ zfcp_erp_adapter_strategy_close(act);
+ return ZFCP_ERP_FAILED;
+ }
+
+ atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &adapter->status);
+
+ return ZFCP_ERP_SUCCEEDED;
}
-/*
- * function:
- *
- * purpose: makes the erp thread continue with reopen (physical) port
- * actions which have been paused until the name server port
- * is opened (or failed)
- *
- * returns: 0 (a kind of void retval, its not used)
- */
-static int
-zfcp_erp_port_strategy_open_nameserver_wakeup(struct zfcp_erp_action
- *ns_erp_action)
+static int zfcp_erp_adapter_strategy(struct zfcp_erp_action *act)
{
- int retval = 0;
- unsigned long flags;
- struct zfcp_adapter *adapter = ns_erp_action->adapter;
- struct zfcp_erp_action *erp_action, *tmp;
+ struct zfcp_adapter *adapter = act->adapter;
- read_lock_irqsave(&adapter->erp_lock, flags);
- list_for_each_entry_safe(erp_action, tmp, &adapter->erp_running_head,
- list) {
- debug_text_event(adapter->erp_dbf, 4, "p_pstnsw_n");
- debug_event(adapter->erp_dbf, 4, &erp_action->port->wwpn,
- sizeof (wwn_t));
- if (erp_action->step == ZFCP_ERP_STEP_NAMESERVER_OPEN) {
- debug_text_event(adapter->erp_dbf, 3, "p_pstnsw_w");
- debug_event(adapter->erp_dbf, 3,
- &erp_action->port->wwpn, sizeof (wwn_t));
- if (atomic_test_mask(
- ZFCP_STATUS_COMMON_ERP_FAILED,
- &adapter->nameserver_port->status))
- zfcp_erp_port_failed(erp_action->port);
- zfcp_erp_action_ready(erp_action);
- }
+ if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN) {
+ zfcp_erp_adapter_strategy_close(act);
+ if (act->status & ZFCP_STATUS_ERP_CLOSE_ONLY)
+ return ZFCP_ERP_EXIT;
}
- read_unlock_irqrestore(&adapter->erp_lock, flags);
- return retval;
+ if (zfcp_erp_adapter_strategy_open(act)) {
+ ssleep(8);
+ return ZFCP_ERP_FAILED;
+ }
+
+ return ZFCP_ERP_SUCCEEDED;
}
-/*
- * function:
- *
- * purpose:
- *
- * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously)
- * ZFCP_ERP_FAILED - action finished unsuccessfully
- */
-static int
-zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *erp_action)
+static int zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *act)
{
int retval;
- struct zfcp_adapter *adapter = erp_action->adapter;
- struct zfcp_port *port = erp_action->port;
- zfcp_erp_timeout_init(erp_action);
- retval = zfcp_fsf_close_physical_port(erp_action);
- if (retval == -ENOMEM) {
- debug_text_event(adapter->erp_dbf, 5, "o_pfstc_nomem");
- debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t));
- retval = ZFCP_ERP_NOMEM;
- goto out;
- }
- erp_action->step = ZFCP_ERP_STEP_PHYS_PORT_CLOSING;
- if (retval != 0) {
- debug_text_event(adapter->erp_dbf, 5, "o_pfstc_cpf");
- debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t));
- /* could not send 'open', fail */
- retval = ZFCP_ERP_FAILED;
- goto out;
- }
- debug_text_event(adapter->erp_dbf, 6, "o_pfstc_cpok");
- debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t));
- retval = ZFCP_ERP_CONTINUES;
- out:
- return retval;
+ retval = zfcp_fsf_close_physical_port(act);
+ if (retval == -ENOMEM)
+ return ZFCP_ERP_NOMEM;
+ act->step = ZFCP_ERP_STEP_PHYS_PORT_CLOSING;
+ if (retval)
+ return ZFCP_ERP_FAILED;
+
+ return ZFCP_ERP_CONTINUES;
}
-static int
-zfcp_erp_port_strategy_clearstati(struct zfcp_port *port)
+static void zfcp_erp_port_strategy_clearstati(struct zfcp_port *port)
{
- int retval = 0;
- struct zfcp_adapter *adapter = port->adapter;
+ atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED, &port->status);
+}
+
+static int zfcp_erp_port_forced_strategy(struct zfcp_erp_action *erp_action)
+{
+ struct zfcp_port *port = erp_action->port;
+ int status = atomic_read(&port->status);
- debug_text_event(adapter->erp_dbf, 5, "p_pstclst");
- debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t));
+ switch (erp_action->step) {
+ case ZFCP_ERP_STEP_UNINITIALIZED:
+ zfcp_erp_port_strategy_clearstati(port);
+ if ((status & ZFCP_STATUS_PORT_PHYS_OPEN) &&
+ (status & ZFCP_STATUS_COMMON_OPEN))
+ return zfcp_erp_port_forced_strategy_close(erp_action);
+ else
+ return ZFCP_ERP_FAILED;
- atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING |
- ZFCP_STATUS_COMMON_CLOSING |
- ZFCP_STATUS_COMMON_ACCESS_DENIED |
- ZFCP_STATUS_PORT_DID_DID |
- ZFCP_STATUS_PORT_PHYS_CLOSING |
- ZFCP_STATUS_PORT_INVALID_WWPN,
- &port->status);
- return retval;
+ case ZFCP_ERP_STEP_PHYS_PORT_CLOSING:
+ if (!(status & ZFCP_STATUS_PORT_PHYS_OPEN))
+ return ZFCP_ERP_SUCCEEDED;
+ }
+ return ZFCP_ERP_FAILED;
}
-/*
- * function:
- *
- * purpose:
- *
- * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously)
- * ZFCP_ERP_FAILED - action finished unsuccessfully
- */
-static int
-zfcp_erp_port_strategy_close(struct zfcp_erp_action *erp_action)
+static int zfcp_erp_port_strategy_close(struct zfcp_erp_action *erp_action)
{
int retval;
- struct zfcp_adapter *adapter = erp_action->adapter;
- struct zfcp_port *port = erp_action->port;
- zfcp_erp_timeout_init(erp_action);
retval = zfcp_fsf_close_port(erp_action);
- if (retval == -ENOMEM) {
- debug_text_event(adapter->erp_dbf, 5, "p_pstc_nomem");
- debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t));
- retval = ZFCP_ERP_NOMEM;
- goto out;
- }
+ if (retval == -ENOMEM)
+ return ZFCP_ERP_NOMEM;
erp_action->step = ZFCP_ERP_STEP_PORT_CLOSING;
- if (retval != 0) {
- debug_text_event(adapter->erp_dbf, 5, "p_pstc_cpf");
- debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t));
- /* could not send 'close', fail */
- retval = ZFCP_ERP_FAILED;
- goto out;
- }
- debug_text_event(adapter->erp_dbf, 6, "p_pstc_cpok");
- debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t));
- retval = ZFCP_ERP_CONTINUES;
- out:
- return retval;
+ if (retval)
+ return ZFCP_ERP_FAILED;
+ return ZFCP_ERP_CONTINUES;
}
-/*
- * function:
- *
- * purpose:
- *
- * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously)
- * ZFCP_ERP_FAILED - action finished unsuccessfully
- */
-static int
-zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *erp_action)
+static int zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *erp_action)
{
int retval;
- struct zfcp_adapter *adapter = erp_action->adapter;
- struct zfcp_port *port = erp_action->port;
- zfcp_erp_timeout_init(erp_action);
retval = zfcp_fsf_open_port(erp_action);
- if (retval == -ENOMEM) {
- debug_text_event(adapter->erp_dbf, 5, "p_psto_nomem");
- debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t));
- retval = ZFCP_ERP_NOMEM;
- goto out;
- }
+ if (retval == -ENOMEM)
+ return ZFCP_ERP_NOMEM;
erp_action->step = ZFCP_ERP_STEP_PORT_OPENING;
- if (retval != 0) {
- debug_text_event(adapter->erp_dbf, 5, "p_psto_opf");
- debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t));
- /* could not send 'open', fail */
- retval = ZFCP_ERP_FAILED;
- goto out;
- }
- debug_text_event(adapter->erp_dbf, 6, "p_psto_opok");
- debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t));
- retval = ZFCP_ERP_CONTINUES;
- out:
- return retval;
+ if (retval)
+ return ZFCP_ERP_FAILED;
+ return ZFCP_ERP_CONTINUES;
}
-/*
- * function:
- *
- * purpose:
- *
- * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously)
- * ZFCP_ERP_FAILED - action finished unsuccessfully
- */
-static int
-zfcp_erp_port_strategy_open_common_lookup(struct zfcp_erp_action *erp_action)
+static int zfcp_erp_open_ptp_port(struct zfcp_erp_action *act)
{
- int retval;
- struct zfcp_adapter *adapter = erp_action->adapter;
- struct zfcp_port *port = erp_action->port;
+ struct zfcp_adapter *adapter = act->adapter;
+ struct zfcp_port *port = act->port;
- zfcp_erp_timeout_init(erp_action);
- retval = zfcp_ns_gid_pn_request(erp_action);
- if (retval == -ENOMEM) {
- debug_text_event(adapter->erp_dbf, 5, "p_pstn_nomem");
- debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t));
- retval = ZFCP_ERP_NOMEM;
- goto out;
- }
- erp_action->step = ZFCP_ERP_STEP_NAMESERVER_LOOKUP;
- if (retval != 0) {
- debug_text_event(adapter->erp_dbf, 5, "p_pstn_ref");
- debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t));
- /* could not send nameserver request, fail */
- retval = ZFCP_ERP_FAILED;
- goto out;
+ if (port->wwpn != adapter->peer_wwpn) {
+ zfcp_erp_port_failed(port, "eroptp1", NULL);
+ return ZFCP_ERP_FAILED;
}
- debug_text_event(adapter->erp_dbf, 6, "p_pstn_reok");
- debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t));
- retval = ZFCP_ERP_CONTINUES;
- out:
- return retval;
+ port->d_id = adapter->peer_d_id;
+ return zfcp_erp_port_strategy_open_port(act);
}
-/*
- * function:
- *
- * purpose: this routine executes the 'Reopen Unit' action
- * currently no retries
- *
- * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously)
- * ZFCP_ERP_SUCCEEDED - action finished successfully
- * ZFCP_ERP_FAILED - action finished unsuccessfully
- */
-static int
-zfcp_erp_unit_strategy(struct zfcp_erp_action *erp_action)
+static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act)
{
- int retval = ZFCP_ERP_FAILED;
- struct zfcp_unit *unit = erp_action->unit;
- struct zfcp_adapter *adapter = erp_action->adapter;
-
- switch (erp_action->step) {
+ struct zfcp_adapter *adapter = act->adapter;
+ struct zfcp_port *port = act->port;
+ int p_status = atomic_read(&port->status);
- /*
- * FIXME:
- * the ULP spec. begs for waiting for oustanding commands
- */
+ switch (act->step) {
case ZFCP_ERP_STEP_UNINITIALIZED:
- zfcp_erp_unit_strategy_clearstati(unit);
- if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status)) {
- ZFCP_LOG_DEBUG("unit 0x%016Lx is open -> "
- "trying close\n", unit->fcp_lun);
- retval = zfcp_erp_unit_strategy_close(erp_action);
- break;
+ case ZFCP_ERP_STEP_PHYS_PORT_CLOSING:
+ case ZFCP_ERP_STEP_PORT_CLOSING:
+ if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP)
+ return zfcp_erp_open_ptp_port(act);
+ if (!port->d_id) {
+ zfcp_fc_trigger_did_lookup(port);
+ return ZFCP_ERP_EXIT;
}
- /* else it's already closed, fall through */
- case ZFCP_ERP_STEP_UNIT_CLOSING:
- if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status)) {
- ZFCP_LOG_DEBUG("close failed for unit 0x%016Lx\n",
- unit->fcp_lun);
- retval = ZFCP_ERP_FAILED;
- } else {
- if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY)
- retval = ZFCP_ERP_EXIT;
- else {
- ZFCP_LOG_DEBUG("unit 0x%016Lx is not open -> "
- "trying open\n", unit->fcp_lun);
- retval =
- zfcp_erp_unit_strategy_open(erp_action);
+ return zfcp_erp_port_strategy_open_port(act);
+
+ case ZFCP_ERP_STEP_PORT_OPENING:
+ /* D_ID might have changed during open */
+ if (p_status & ZFCP_STATUS_COMMON_OPEN) {
+ if (!port->d_id) {
+ zfcp_fc_trigger_did_lookup(port);
+ return ZFCP_ERP_EXIT;
}
+ return ZFCP_ERP_SUCCEEDED;
+ }
+ if (port->d_id && !(p_status & ZFCP_STATUS_COMMON_NOESC)) {
+ port->d_id = 0;
+ _zfcp_erp_port_reopen(port, 0, "erpsoc1", NULL);
+ return ZFCP_ERP_EXIT;
}
+ /* fall through otherwise */
+ }
+ return ZFCP_ERP_FAILED;
+}
+
+static int zfcp_erp_port_strategy(struct zfcp_erp_action *erp_action)
+{
+ struct zfcp_port *port = erp_action->port;
+ int p_status = atomic_read(&port->status);
+
+ if ((p_status & ZFCP_STATUS_COMMON_NOESC) &&
+ !(p_status & ZFCP_STATUS_COMMON_OPEN))
+ goto close_init_done;
+
+ switch (erp_action->step) {
+ case ZFCP_ERP_STEP_UNINITIALIZED:
+ zfcp_erp_port_strategy_clearstati(port);
+ if (p_status & ZFCP_STATUS_COMMON_OPEN)
+ return zfcp_erp_port_strategy_close(erp_action);
break;
- case ZFCP_ERP_STEP_UNIT_OPENING:
- if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status)) {
- ZFCP_LOG_DEBUG("unit 0x%016Lx is open\n",
- unit->fcp_lun);
- retval = ZFCP_ERP_SUCCEEDED;
- } else {
- ZFCP_LOG_DEBUG("open failed for unit 0x%016Lx\n",
- unit->fcp_lun);
- retval = ZFCP_ERP_FAILED;
- }
+ case ZFCP_ERP_STEP_PORT_CLOSING:
+ if (p_status & ZFCP_STATUS_COMMON_OPEN)
+ return ZFCP_ERP_FAILED;
break;
}
- debug_text_event(adapter->erp_dbf, 3, "u_ust/ret");
- debug_event(adapter->erp_dbf, 3, &unit->fcp_lun, sizeof (fcp_lun_t));
- debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int));
- debug_event(adapter->erp_dbf, 3, &retval, sizeof (int));
- return retval;
+close_init_done:
+ if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY)
+ return ZFCP_ERP_EXIT;
+
+ return zfcp_erp_port_strategy_open_common(erp_action);
}
-static int
-zfcp_erp_unit_strategy_clearstati(struct zfcp_unit *unit)
+static void zfcp_erp_unit_strategy_clearstati(struct zfcp_unit *unit)
{
- int retval = 0;
- struct zfcp_adapter *adapter = unit->port->adapter;
-
- debug_text_event(adapter->erp_dbf, 5, "u_ustclst");
- debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, sizeof (fcp_lun_t));
-
- atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING |
- ZFCP_STATUS_COMMON_CLOSING |
- ZFCP_STATUS_COMMON_ACCESS_DENIED |
+ atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
ZFCP_STATUS_UNIT_SHARED |
ZFCP_STATUS_UNIT_READONLY,
&unit->status);
-
- return retval;
}
-/*
- * function:
- *
- * purpose:
- *
- * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously)
- * ZFCP_ERP_FAILED - action finished unsuccessfully
- */
-static int
-zfcp_erp_unit_strategy_close(struct zfcp_erp_action *erp_action)
+static int zfcp_erp_unit_strategy_close(struct zfcp_erp_action *erp_action)
{
- int retval;
- struct zfcp_adapter *adapter = erp_action->adapter;
- struct zfcp_unit *unit = erp_action->unit;
-
- zfcp_erp_timeout_init(erp_action);
- retval = zfcp_fsf_close_unit(erp_action);
- if (retval == -ENOMEM) {
- debug_text_event(adapter->erp_dbf, 5, "u_ustc_nomem");
- debug_event(adapter->erp_dbf, 5, &unit->fcp_lun,
- sizeof (fcp_lun_t));
- retval = ZFCP_ERP_NOMEM;
- goto out;
- }
+ int retval = zfcp_fsf_close_unit(erp_action);
+ if (retval == -ENOMEM)
+ return ZFCP_ERP_NOMEM;
erp_action->step = ZFCP_ERP_STEP_UNIT_CLOSING;
- if (retval != 0) {
- debug_text_event(adapter->erp_dbf, 5, "u_ustc_cuf");
- debug_event(adapter->erp_dbf, 5, &unit->fcp_lun,
- sizeof (fcp_lun_t));
- /* could not send 'close', fail */
- retval = ZFCP_ERP_FAILED;
- goto out;
- }
- debug_text_event(adapter->erp_dbf, 6, "u_ustc_cuok");
- debug_event(adapter->erp_dbf, 6, &unit->fcp_lun, sizeof (fcp_lun_t));
- retval = ZFCP_ERP_CONTINUES;
+ if (retval)
+ return ZFCP_ERP_FAILED;
+ return ZFCP_ERP_CONTINUES;
+}
- out:
- return retval;
+static int zfcp_erp_unit_strategy_open(struct zfcp_erp_action *erp_action)
+{
+ int retval = zfcp_fsf_open_unit(erp_action);
+ if (retval == -ENOMEM)
+ return ZFCP_ERP_NOMEM;
+ erp_action->step = ZFCP_ERP_STEP_UNIT_OPENING;
+ if (retval)
+ return ZFCP_ERP_FAILED;
+ return ZFCP_ERP_CONTINUES;
}
-/*
- * function:
- *
- * purpose:
- *
- * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously)
- * ZFCP_ERP_FAILED - action finished unsuccessfully
- */
-static int
-zfcp_erp_unit_strategy_open(struct zfcp_erp_action *erp_action)
+static int zfcp_erp_unit_strategy(struct zfcp_erp_action *erp_action)
{
- int retval;
- struct zfcp_adapter *adapter = erp_action->adapter;
struct zfcp_unit *unit = erp_action->unit;
- zfcp_erp_timeout_init(erp_action);
- retval = zfcp_fsf_open_unit(erp_action);
- if (retval == -ENOMEM) {
- debug_text_event(adapter->erp_dbf, 5, "u_usto_nomem");
- debug_event(adapter->erp_dbf, 5, &unit->fcp_lun,
- sizeof (fcp_lun_t));
- retval = ZFCP_ERP_NOMEM;
- goto out;
- }
- erp_action->step = ZFCP_ERP_STEP_UNIT_OPENING;
- if (retval != 0) {
- debug_text_event(adapter->erp_dbf, 5, "u_usto_ouf");
- debug_event(adapter->erp_dbf, 5, &unit->fcp_lun,
- sizeof (fcp_lun_t));
- /* could not send 'open', fail */
- retval = ZFCP_ERP_FAILED;
- goto out;
+ switch (erp_action->step) {
+ case ZFCP_ERP_STEP_UNINITIALIZED:
+ zfcp_erp_unit_strategy_clearstati(unit);
+ if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_OPEN)
+ return zfcp_erp_unit_strategy_close(erp_action);
+ /* already closed, fall through */
+ case ZFCP_ERP_STEP_UNIT_CLOSING:
+ if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_OPEN)
+ return ZFCP_ERP_FAILED;
+ if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY)
+ return ZFCP_ERP_EXIT;
+ return zfcp_erp_unit_strategy_open(erp_action);
+
+ case ZFCP_ERP_STEP_UNIT_OPENING:
+ if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_OPEN)
+ return ZFCP_ERP_SUCCEEDED;
}
- debug_text_event(adapter->erp_dbf, 6, "u_usto_ouok");
- debug_event(adapter->erp_dbf, 6, &unit->fcp_lun, sizeof (fcp_lun_t));
- retval = ZFCP_ERP_CONTINUES;
- out:
- return retval;
+ return ZFCP_ERP_FAILED;
}
-static inline void
-zfcp_erp_timeout_init(struct zfcp_erp_action *erp_action)
+static int zfcp_erp_strategy_check_unit(struct zfcp_unit *unit, int result)
{
- init_timer(&erp_action->timer);
- erp_action->timer.function = zfcp_erp_timeout_handler;
- erp_action->timer.data = (unsigned long) erp_action;
- /* jiffies will be added in zfcp_fsf_req_send */
- erp_action->timer.expires = ZFCP_ERP_FSFREQ_TIMEOUT;
-}
+ switch (result) {
+ case ZFCP_ERP_SUCCEEDED :
+ atomic_set(&unit->erp_counter, 0);
+ zfcp_erp_unit_unblock(unit);
+ break;
+ case ZFCP_ERP_FAILED :
+ atomic_inc(&unit->erp_counter);
+ if (atomic_read(&unit->erp_counter) > ZFCP_MAX_ERPS) {
+ dev_err(&unit->port->adapter->ccw_device->dev,
+ "ERP failed for unit 0x%016Lx on "
+ "port 0x%016Lx\n",
+ (unsigned long long)unit->fcp_lun,
+ (unsigned long long)unit->port->wwpn);
+ zfcp_erp_unit_failed(unit, "erusck1", NULL);
+ }
+ break;
+ }
-/*
- * function:
- *
- * purpose: enqueue the specified error recovery action, if needed
- *
- * returns:
- */
-static int
-zfcp_erp_action_enqueue(int action,
- struct zfcp_adapter *adapter,
- struct zfcp_port *port, struct zfcp_unit *unit)
-{
- int retval = 1;
- struct zfcp_erp_action *erp_action = NULL;
- int stronger_action = 0;
- u32 status = 0;
+ if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
+ zfcp_erp_unit_block(unit, 0);
+ result = ZFCP_ERP_EXIT;
+ }
+ return result;
+}
- /*
- * We need some rules here which check whether we really need
- * this action or whether we should just drop it.
- * E.g. if there is a unfinished 'Reopen Port' request then we drop a
- * 'Reopen Unit' request for an associated unit since we can't
- * satisfy this request now. A 'Reopen Port' action will trigger
- * 'Reopen Unit' actions when it completes.
- * Thus, there are only actions in the queue which can immediately be
- * executed. This makes the processing of the action queue more
- * efficient.
- */
-
- if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP,
- &adapter->status))
- return -EIO;
+static int zfcp_erp_strategy_check_port(struct zfcp_port *port, int result)
+{
+ switch (result) {
+ case ZFCP_ERP_SUCCEEDED :
+ atomic_set(&port->erp_counter, 0);
+ zfcp_erp_port_unblock(port);
+ break;
- debug_event(adapter->erp_dbf, 4, &action, sizeof (int));
- /* check whether we really need this */
- switch (action) {
- case ZFCP_ERP_ACTION_REOPEN_UNIT:
- if (atomic_test_mask
- (ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status)) {
- debug_text_event(adapter->erp_dbf, 4, "u_actenq_drp");
- debug_event(adapter->erp_dbf, 4, &port->wwpn,
- sizeof (wwn_t));
- debug_event(adapter->erp_dbf, 4, &unit->fcp_lun,
- sizeof (fcp_lun_t));
- goto out;
- }
- if (!atomic_test_mask
- (ZFCP_STATUS_COMMON_RUNNING, &port->status) ||
- atomic_test_mask
- (ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) {
- goto out;
+ case ZFCP_ERP_FAILED :
+ if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC) {
+ zfcp_erp_port_block(port, 0);
+ result = ZFCP_ERP_EXIT;
}
- if (!atomic_test_mask
- (ZFCP_STATUS_COMMON_UNBLOCKED, &port->status)) {
- stronger_action = ZFCP_ERP_ACTION_REOPEN_PORT;
- unit = NULL;
+ atomic_inc(&port->erp_counter);
+ if (atomic_read(&port->erp_counter) > ZFCP_MAX_ERPS) {
+ dev_err(&port->adapter->ccw_device->dev,
+ "ERP failed for remote port 0x%016Lx\n",
+ (unsigned long long)port->wwpn);
+ zfcp_erp_port_failed(port, "erpsck1", NULL);
}
- /* fall through !!! */
+ break;
+ }
- case ZFCP_ERP_ACTION_REOPEN_PORT:
- if (atomic_test_mask
- (ZFCP_STATUS_COMMON_ERP_INUSE, &port->status)) {
- debug_text_event(adapter->erp_dbf, 4, "p_actenq_drp");
- debug_event(adapter->erp_dbf, 4, &port->wwpn,
- sizeof (wwn_t));
- goto out;
- }
- /* fall through !!! */
+ if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
+ zfcp_erp_port_block(port, 0);
+ result = ZFCP_ERP_EXIT;
+ }
+ return result;
+}
- case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
- if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE,
- &port->status)) {
- if (port->erp_action.action !=
- ZFCP_ERP_ACTION_REOPEN_PORT_FORCED) {
- ZFCP_LOG_INFO("dropped erp action %i (port "
- "0x%016Lx, action in use: %i)\n",
- action, port->wwpn,
- port->erp_action.action);
- debug_text_event(adapter->erp_dbf, 4,
- "pf_actenq_drp");
- } else
- debug_text_event(adapter->erp_dbf, 4,
- "pf_actenq_drpcp");
- debug_event(adapter->erp_dbf, 4, &port->wwpn,
- sizeof (wwn_t));
- goto out;
- }
- if (!atomic_test_mask
- (ZFCP_STATUS_COMMON_RUNNING, &adapter->status) ||
- atomic_test_mask
- (ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) {
- goto out;
- }
- if (!atomic_test_mask
- (ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status)) {
- stronger_action = ZFCP_ERP_ACTION_REOPEN_ADAPTER;
- port = NULL;
- }
- /* fall through !!! */
+static int zfcp_erp_strategy_check_adapter(struct zfcp_adapter *adapter,
+ int result)
+{
+ switch (result) {
+ case ZFCP_ERP_SUCCEEDED :
+ atomic_set(&adapter->erp_counter, 0);
+ zfcp_erp_adapter_unblock(adapter);
+ break;
- case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
- if (atomic_test_mask
- (ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status)) {
- debug_text_event(adapter->erp_dbf, 4, "a_actenq_drp");
- goto out;
+ case ZFCP_ERP_FAILED :
+ atomic_inc(&adapter->erp_counter);
+ if (atomic_read(&adapter->erp_counter) > ZFCP_MAX_ERPS) {
+ dev_err(&adapter->ccw_device->dev,
+ "ERP cannot recover an error "
+ "on the FCP device\n");
+ zfcp_erp_adapter_failed(adapter, "erasck1", NULL);
}
break;
-
- default:
- debug_text_exception(adapter->erp_dbf, 1, "a_actenq_bug");
- debug_event(adapter->erp_dbf, 1, &action, sizeof (int));
- ZFCP_LOG_NORMAL("bug: unknown erp action requested "
- "on adapter %s (action=%d)\n",
- zfcp_get_busid_by_adapter(adapter), action);
- goto out;
}
- /* check whether we need something stronger first */
- if (stronger_action) {
- debug_text_event(adapter->erp_dbf, 4, "a_actenq_str");
- debug_event(adapter->erp_dbf, 4, &stronger_action,
- sizeof (int));
- ZFCP_LOG_DEBUG("stronger erp action %d needed before "
- "erp action %d on adapter %s\n",
- stronger_action, action,
- zfcp_get_busid_by_adapter(adapter));
- action = stronger_action;
+ if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
+ zfcp_erp_adapter_block(adapter, 0);
+ result = ZFCP_ERP_EXIT;
}
+ return result;
+}
- /* mark adapter to have some error recovery pending */
- atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, &adapter->status);
+static int zfcp_erp_strategy_check_target(struct zfcp_erp_action *erp_action,
+ int result)
+{
+ struct zfcp_adapter *adapter = erp_action->adapter;
+ struct zfcp_port *port = erp_action->port;
+ struct zfcp_unit *unit = erp_action->unit;
- /* setup error recovery action */
- switch (action) {
+ switch (erp_action->action) {
case ZFCP_ERP_ACTION_REOPEN_UNIT:
- zfcp_unit_get(unit);
- atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status);
- erp_action = &unit->erp_action;
- if (!atomic_test_mask
- (ZFCP_STATUS_COMMON_RUNNING, &unit->status))
- status = ZFCP_STATUS_ERP_CLOSE_ONLY;
+ result = zfcp_erp_strategy_check_unit(unit, result);
break;
- case ZFCP_ERP_ACTION_REOPEN_PORT:
case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
- zfcp_port_get(port);
- zfcp_erp_action_dismiss_port(port);
- atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status);
- erp_action = &port->erp_action;
- if (!atomic_test_mask
- (ZFCP_STATUS_COMMON_RUNNING, &port->status))
- status = ZFCP_STATUS_ERP_CLOSE_ONLY;
+ case ZFCP_ERP_ACTION_REOPEN_PORT:
+ result = zfcp_erp_strategy_check_port(port, result);
break;
case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
- zfcp_adapter_get(adapter);
- zfcp_erp_action_dismiss_adapter(adapter);
- atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status);
- erp_action = &adapter->erp_action;
- if (!atomic_test_mask
- (ZFCP_STATUS_COMMON_RUNNING, &adapter->status))
- status = ZFCP_STATUS_ERP_CLOSE_ONLY;
+ result = zfcp_erp_strategy_check_adapter(adapter, result);
break;
}
+ return result;
+}
- debug_text_event(adapter->erp_dbf, 4, "a_actenq");
+static int zfcp_erp_strat_change_det(atomic_t *target_status, u32 erp_status)
+{
+ int status = atomic_read(target_status);
- memset(erp_action, 0, sizeof (struct zfcp_erp_action));
- erp_action->adapter = adapter;
- erp_action->port = port;
- erp_action->unit = unit;
- erp_action->action = action;
- erp_action->status = status;
+ if ((status & ZFCP_STATUS_COMMON_RUNNING) &&
+ (erp_status & ZFCP_STATUS_ERP_CLOSE_ONLY))
+ return 1; /* take it online */
- ++adapter->erp_total_count;
+ if (!(status & ZFCP_STATUS_COMMON_RUNNING) &&
+ !(erp_status & ZFCP_STATUS_ERP_CLOSE_ONLY))
+ return 1; /* take it offline */
- /* finally put it into 'ready' queue and kick erp thread */
- list_add(&erp_action->list, &adapter->erp_ready_head);
- up(&adapter->erp_ready_sem);
- retval = 0;
- out:
- return retval;
+ return 0;
+}
+
+static int zfcp_erp_strategy_statechange(struct zfcp_erp_action *act, int ret)
+{
+ int action = act->action;
+ struct zfcp_adapter *adapter = act->adapter;
+ struct zfcp_port *port = act->port;
+ struct zfcp_unit *unit = act->unit;
+ u32 erp_status = act->status;
+
+ switch (action) {
+ case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
+ if (zfcp_erp_strat_change_det(&adapter->status, erp_status)) {
+ _zfcp_erp_adapter_reopen(adapter,
+ ZFCP_STATUS_COMMON_ERP_FAILED,
+ "ersscg1", NULL);
+ return ZFCP_ERP_EXIT;
+ }
+ break;
+
+ case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
+ case ZFCP_ERP_ACTION_REOPEN_PORT:
+ if (zfcp_erp_strat_change_det(&port->status, erp_status)) {
+ _zfcp_erp_port_reopen(port,
+ ZFCP_STATUS_COMMON_ERP_FAILED,
+ "ersscg2", NULL);
+ return ZFCP_ERP_EXIT;
+ }
+ break;
+
+ case ZFCP_ERP_ACTION_REOPEN_UNIT:
+ if (zfcp_erp_strat_change_det(&unit->status, erp_status)) {
+ _zfcp_erp_unit_reopen(unit,
+ ZFCP_STATUS_COMMON_ERP_FAILED,
+ "ersscg3", NULL);
+ return ZFCP_ERP_EXIT;
+ }
+ break;
+ }
+ return ret;
}
-static int
-zfcp_erp_action_dequeue(struct zfcp_erp_action *erp_action)
+static void zfcp_erp_action_dequeue(struct zfcp_erp_action *erp_action)
{
- int retval = 0;
struct zfcp_adapter *adapter = erp_action->adapter;
- --adapter->erp_total_count;
+ adapter->erp_total_count--;
if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) {
- --adapter->erp_low_mem_count;
+ adapter->erp_low_mem_count--;
erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM;
}
- debug_text_event(adapter->erp_dbf, 4, "a_actdeq");
- debug_event(adapter->erp_dbf, 4, &erp_action->action, sizeof (int));
list_del(&erp_action->list);
+ zfcp_dbf_rec_action("eractd1", erp_action);
+
switch (erp_action->action) {
case ZFCP_ERP_ACTION_REOPEN_UNIT:
atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE,
&erp_action->unit->status);
break;
+
case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
case ZFCP_ERP_ACTION_REOPEN_PORT:
atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE,
&erp_action->port->status);
break;
+
case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE,
&erp_action->adapter->status);
break;
- default:
- /* bug */
- break;
}
- return retval;
}
-/**
- * zfcp_erp_action_cleanup
- *
- * Register unit with scsi stack if appropriate and fix reference counts.
- * Note: Temporary units are not registered with scsi stack.
- */
-static void
-zfcp_erp_action_cleanup(int action, struct zfcp_adapter *adapter,
- struct zfcp_port *port, struct zfcp_unit *unit,
- int result)
+static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result)
{
- switch (action) {
+ struct zfcp_adapter *adapter = act->adapter;
+ struct zfcp_port *port = act->port;
+ struct zfcp_unit *unit = act->unit;
+
+ switch (act->action) {
case ZFCP_ERP_ACTION_REOPEN_UNIT:
- if ((result == ZFCP_ERP_SUCCEEDED)
- && (!atomic_test_mask(ZFCP_STATUS_UNIT_TEMPORARY,
- &unit->status))
- && !unit->device
- && port->rport) {
- atomic_set_mask(ZFCP_STATUS_UNIT_REGISTERED,
- &unit->status);
- scsi_scan_target(&port->rport->dev, 0,
- port->rport->scsi_target_id,
- unit->scsi_lun, 0);
+ if ((result == ZFCP_ERP_SUCCEEDED) && !unit->device) {
+ get_device(&unit->dev);
+ if (scsi_queue_work(unit->port->adapter->scsi_host,
+ &unit->scsi_work) <= 0)
+ put_device(&unit->dev);
}
- zfcp_unit_put(unit);
+ put_device(&unit->dev);
break;
+
case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
case ZFCP_ERP_ACTION_REOPEN_PORT:
- if ((result == ZFCP_ERP_SUCCEEDED)
- && !atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN,
- &port->status)
- && !port->rport) {
- struct fc_rport_identifiers ids;
- ids.node_name = port->wwnn;
- ids.port_name = port->wwpn;
- ids.port_id = port->d_id;
- ids.roles = FC_RPORT_ROLE_FCP_TARGET;
- port->rport =
- fc_remote_port_add(adapter->scsi_host, 0, &ids);
- if (!port->rport)
- ZFCP_LOG_NORMAL("failed registration of rport"
- "(adapter %s, wwpn=0x%016Lx)\n",
- zfcp_get_busid_by_port(port),
- port->wwpn);
- else {
- scsi_flush_work(adapter->scsi_host);
- port->rport->maxframe_size = port->maxframe_size;
- port->rport->supported_classes =
- port->supported_classes;
- }
- }
- zfcp_port_put(port);
+ if (result == ZFCP_ERP_SUCCEEDED)
+ zfcp_scsi_schedule_rport_register(port);
+ put_device(&port->dev);
break;
+
case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
- zfcp_adapter_put(adapter);
- break;
- default:
+ if (result == ZFCP_ERP_SUCCEEDED) {
+ register_service_level(&adapter->service_level);
+ queue_work(adapter->work_queue, &adapter->scan_work);
+ } else
+ unregister_service_level(&adapter->service_level);
+ kref_put(&adapter->ref, zfcp_adapter_release);
break;
}
}
+static int zfcp_erp_strategy_do_action(struct zfcp_erp_action *erp_action)
+{
+ switch (erp_action->action) {
+ case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
+ return zfcp_erp_adapter_strategy(erp_action);
+ case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
+ return zfcp_erp_port_forced_strategy(erp_action);
+ case ZFCP_ERP_ACTION_REOPEN_PORT:
+ return zfcp_erp_port_strategy(erp_action);
+ case ZFCP_ERP_ACTION_REOPEN_UNIT:
+ return zfcp_erp_unit_strategy(erp_action);
+ }
+ return ZFCP_ERP_FAILED;
+}
-static int
-zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *adapter)
+static int zfcp_erp_strategy(struct zfcp_erp_action *erp_action)
{
- int retval = 0;
- struct zfcp_port *port;
+ int retval;
+ unsigned long flags;
+ struct zfcp_adapter *adapter = erp_action->adapter;
- debug_text_event(adapter->erp_dbf, 5, "a_actab");
- if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status))
- zfcp_erp_action_dismiss(&adapter->erp_action);
- else
- list_for_each_entry(port, &adapter->port_list_head, list)
- zfcp_erp_action_dismiss_port(port);
+ kref_get(&adapter->ref);
+
+ write_lock_irqsave(&adapter->erp_lock, flags);
+ zfcp_erp_strategy_check_fsfreq(erp_action);
+
+ if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) {
+ zfcp_erp_action_dequeue(erp_action);
+ retval = ZFCP_ERP_DISMISSED;
+ goto unlock;
+ }
+
+ zfcp_erp_action_to_running(erp_action);
+
+ /* no lock to allow for blocking operations */
+ write_unlock_irqrestore(&adapter->erp_lock, flags);
+ retval = zfcp_erp_strategy_do_action(erp_action);
+ write_lock_irqsave(&adapter->erp_lock, flags);
+
+ if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED)
+ retval = ZFCP_ERP_CONTINUES;
+
+ switch (retval) {
+ case ZFCP_ERP_NOMEM:
+ if (!(erp_action->status & ZFCP_STATUS_ERP_LOWMEM)) {
+ ++adapter->erp_low_mem_count;
+ erp_action->status |= ZFCP_STATUS_ERP_LOWMEM;
+ }
+ if (adapter->erp_total_count == adapter->erp_low_mem_count)
+ _zfcp_erp_adapter_reopen(adapter, 0, "erstgy1", NULL);
+ else {
+ zfcp_erp_strategy_memwait(erp_action);
+ retval = ZFCP_ERP_CONTINUES;
+ }
+ goto unlock;
+
+ case ZFCP_ERP_CONTINUES:
+ if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) {
+ --adapter->erp_low_mem_count;
+ erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM;
+ }
+ goto unlock;
+ }
+
+ retval = zfcp_erp_strategy_check_target(erp_action, retval);
+ zfcp_erp_action_dequeue(erp_action);
+ retval = zfcp_erp_strategy_statechange(erp_action, retval);
+ if (retval == ZFCP_ERP_EXIT)
+ goto unlock;
+ if (retval == ZFCP_ERP_SUCCEEDED)
+ zfcp_erp_strategy_followup_success(erp_action);
+ if (retval == ZFCP_ERP_FAILED)
+ zfcp_erp_strategy_followup_failed(erp_action);
+
+ unlock:
+ write_unlock_irqrestore(&adapter->erp_lock, flags);
+
+ if (retval != ZFCP_ERP_CONTINUES)
+ zfcp_erp_action_cleanup(erp_action, retval);
+ kref_put(&adapter->ref, zfcp_adapter_release);
return retval;
}
-static int
-zfcp_erp_action_dismiss_port(struct zfcp_port *port)
+static int zfcp_erp_thread(void *data)
{
- int retval = 0;
- struct zfcp_unit *unit;
- struct zfcp_adapter *adapter = port->adapter;
+ struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
+ struct list_head *next;
+ struct zfcp_erp_action *act;
+ unsigned long flags;
- debug_text_event(adapter->erp_dbf, 5, "p_actab");
- debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t));
- if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status))
- zfcp_erp_action_dismiss(&port->erp_action);
- else
- list_for_each_entry(unit, &port->unit_list_head, list)
- zfcp_erp_action_dismiss_unit(unit);
+ for (;;) {
+ zfcp_dbf_rec_thread_lock("erthrd1", adapter->dbf);
+ wait_event_interruptible(adapter->erp_ready_wq,
+ !list_empty(&adapter->erp_ready_head) ||
+ kthread_should_stop());
+ zfcp_dbf_rec_thread_lock("erthrd2", adapter->dbf);
- return retval;
+ if (kthread_should_stop())
+ break;
+
+ write_lock_irqsave(&adapter->erp_lock, flags);
+ next = adapter->erp_ready_head.next;
+ write_unlock_irqrestore(&adapter->erp_lock, flags);
+
+ if (next != &adapter->erp_ready_head) {
+ act = list_entry(next, struct zfcp_erp_action, list);
+
+ /* there is more to come after dismission, no notify */
+ if (zfcp_erp_strategy(act) != ZFCP_ERP_DISMISSED)
+ zfcp_erp_wakeup(adapter);
+ }
+ }
+
+ return 0;
}
-static int
-zfcp_erp_action_dismiss_unit(struct zfcp_unit *unit)
+/**
+ * zfcp_erp_thread_setup - Start ERP thread for adapter
+ * @adapter: Adapter to start the ERP thread for
+ *
+ * Returns 0 on success or error code from kernel_thread()
+ */
+int zfcp_erp_thread_setup(struct zfcp_adapter *adapter)
{
- int retval = 0;
- struct zfcp_adapter *adapter = unit->port->adapter;
+ struct task_struct *thread;
- debug_text_event(adapter->erp_dbf, 5, "u_actab");
- debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, sizeof (fcp_lun_t));
- if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status))
- zfcp_erp_action_dismiss(&unit->erp_action);
+ thread = kthread_run(zfcp_erp_thread, adapter, "zfcperp%s",
+ dev_name(&adapter->ccw_device->dev));
+ if (IS_ERR(thread)) {
+ dev_err(&adapter->ccw_device->dev,
+ "Creating an ERP thread for the FCP device failed.\n");
+ return PTR_ERR(thread);
+ }
- return retval;
+ adapter->erp_thread = thread;
+ return 0;
}
-static inline void
-zfcp_erp_action_to_running(struct zfcp_erp_action *erp_action)
+/**
+ * zfcp_erp_thread_kill - Stop ERP thread.
+ * @adapter: Adapter where the ERP thread should be stopped.
+ *
+ * The caller of this routine ensures that the specified adapter has
+ * been shut down and that this operation has been completed. Thus,
+ * there are no pending erp_actions which would need to be handled
+ * here.
+ */
+void zfcp_erp_thread_kill(struct zfcp_adapter *adapter)
{
- struct zfcp_adapter *adapter = erp_action->adapter;
+ kthread_stop(adapter->erp_thread);
+ adapter->erp_thread = NULL;
+ WARN_ON(!list_empty(&adapter->erp_ready_head));
+ WARN_ON(!list_empty(&adapter->erp_running_head));
+}
- debug_text_event(adapter->erp_dbf, 6, "a_toru");
- debug_event(adapter->erp_dbf, 6, &erp_action->action, sizeof (int));
- list_move(&erp_action->list, &erp_action->adapter->erp_running_head);
+/**
+ * zfcp_erp_adapter_failed - Set adapter status to failed.
+ * @adapter: Failed adapter.
+ * @id: Event id for debug trace.
+ * @ref: Reference for debug trace.
+ */
+void zfcp_erp_adapter_failed(struct zfcp_adapter *adapter, char *id, void *ref)
+{
+ zfcp_erp_modify_adapter_status(adapter, id, ref,
+ ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET);
}
-static inline void
-zfcp_erp_action_to_ready(struct zfcp_erp_action *erp_action)
+/**
+ * zfcp_erp_port_failed - Set port status to failed.
+ * @port: Failed port.
+ * @id: Event id for debug trace.
+ * @ref: Reference for debug trace.
+ */
+void zfcp_erp_port_failed(struct zfcp_port *port, char *id, void *ref)
{
- struct zfcp_adapter *adapter = erp_action->adapter;
+ zfcp_erp_modify_port_status(port, id, ref,
+ ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET);
+}
+
+/**
+ * zfcp_erp_unit_failed - Set unit status to failed.
+ * @unit: Failed unit.
+ * @id: Event id for debug trace.
+ * @ref: Reference for debug trace.
+ */
+void zfcp_erp_unit_failed(struct zfcp_unit *unit, char *id, void *ref)
+{
+ zfcp_erp_modify_unit_status(unit, id, ref,
+ ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET);
+}
- debug_text_event(adapter->erp_dbf, 6, "a_tore");
- debug_event(adapter->erp_dbf, 6, &erp_action->action, sizeof (int));
- list_move(&erp_action->list, &erp_action->adapter->erp_ready_head);
+/**
+ * zfcp_erp_wait - wait for completion of error recovery on an adapter
+ * @adapter: adapter for which to wait for completion of its error recovery
+ */
+void zfcp_erp_wait(struct zfcp_adapter *adapter)
+{
+ wait_event(adapter->erp_done_wqh,
+ !(atomic_read(&adapter->status) &
+ ZFCP_STATUS_ADAPTER_ERP_PENDING));
}
-void
-zfcp_erp_port_boxed(struct zfcp_port *port)
+/**
+ * zfcp_erp_modify_adapter_status - change adapter status bits
+ * @adapter: adapter to change the status
+ * @id: id for the debug trace
+ * @ref: reference for the debug trace
+ * @mask: status bits to change
+ * @set_or_clear: ZFCP_SET or ZFCP_CLEAR
+ *
+ * Changes in common status bits are propagated to attached ports and units.
+ */
+void zfcp_erp_modify_adapter_status(struct zfcp_adapter *adapter, char *id,
+ void *ref, u32 mask, int set_or_clear)
{
- struct zfcp_adapter *adapter = port->adapter;
+ struct zfcp_port *port;
unsigned long flags;
+ u32 common_mask = mask & ZFCP_COMMON_FLAGS;
+
+ if (set_or_clear == ZFCP_SET) {
+ if (status_change_set(mask, &adapter->status))
+ zfcp_dbf_rec_adapter(id, ref, adapter->dbf);
+ atomic_set_mask(mask, &adapter->status);
+ } else {
+ if (status_change_clear(mask, &adapter->status))
+ zfcp_dbf_rec_adapter(id, ref, adapter->dbf);
+ atomic_clear_mask(mask, &adapter->status);
+ if (mask & ZFCP_STATUS_COMMON_ERP_FAILED)
+ atomic_set(&adapter->erp_counter, 0);
+ }
- debug_text_event(adapter->erp_dbf, 3, "p_access_boxed");
- debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof(wwn_t));
- read_lock_irqsave(&zfcp_data.config_lock, flags);
- zfcp_erp_modify_port_status(port,
- ZFCP_STATUS_COMMON_ACCESS_BOXED,
- ZFCP_SET);
- read_unlock_irqrestore(&zfcp_data.config_lock, flags);
- zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED);
+ if (common_mask) {
+ read_lock_irqsave(&adapter->port_list_lock, flags);
+ list_for_each_entry(port, &adapter->port_list, list)
+ zfcp_erp_modify_port_status(port, id, ref, common_mask,
+ set_or_clear);
+ read_unlock_irqrestore(&adapter->port_list_lock, flags);
+ }
}
-void
-zfcp_erp_unit_boxed(struct zfcp_unit *unit)
+/**
+ * zfcp_erp_modify_port_status - change port status bits
+ * @port: port to change the status bits
+ * @id: id for the debug trace
+ * @ref: reference for the debug trace
+ * @mask: status bits to change
+ * @set_or_clear: ZFCP_SET or ZFCP_CLEAR
+ *
+ * Changes in common status bits are propagated to attached units.
+ */
+void zfcp_erp_modify_port_status(struct zfcp_port *port, char *id, void *ref,
+ u32 mask, int set_or_clear)
{
- struct zfcp_adapter *adapter = unit->port->adapter;
+ struct zfcp_unit *unit;
+ unsigned long flags;
+ u32 common_mask = mask & ZFCP_COMMON_FLAGS;
+
+ if (set_or_clear == ZFCP_SET) {
+ if (status_change_set(mask, &port->status))
+ zfcp_dbf_rec_port(id, ref, port);
+ atomic_set_mask(mask, &port->status);
+ } else {
+ if (status_change_clear(mask, &port->status))
+ zfcp_dbf_rec_port(id, ref, port);
+ atomic_clear_mask(mask, &port->status);
+ if (mask & ZFCP_STATUS_COMMON_ERP_FAILED)
+ atomic_set(&port->erp_counter, 0);
+ }
- debug_text_event(adapter->erp_dbf, 3, "u_access_boxed");
- debug_event(adapter->erp_dbf, 3, &unit->fcp_lun, sizeof(fcp_lun_t));
- zfcp_erp_modify_unit_status(unit,
- ZFCP_STATUS_COMMON_ACCESS_BOXED,
- ZFCP_SET);
- zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED);
+ if (common_mask) {
+ read_lock_irqsave(&port->unit_list_lock, flags);
+ list_for_each_entry(unit, &port->unit_list, list)
+ zfcp_erp_modify_unit_status(unit, id, ref, common_mask,
+ set_or_clear);
+ read_unlock_irqrestore(&port->unit_list_lock, flags);
+ }
}
-void
-zfcp_erp_port_access_denied(struct zfcp_port *port)
+/**
+ * zfcp_erp_modify_unit_status - change unit status bits
+ * @unit: unit to change the status bits
+ * @id: id for the debug trace
+ * @ref: reference for the debug trace
+ * @mask: status bits to change
+ * @set_or_clear: ZFCP_SET or ZFCP_CLEAR
+ */
+void zfcp_erp_modify_unit_status(struct zfcp_unit *unit, char *id, void *ref,
+ u32 mask, int set_or_clear)
{
- struct zfcp_adapter *adapter = port->adapter;
- unsigned long flags;
+ if (set_or_clear == ZFCP_SET) {
+ if (status_change_set(mask, &unit->status))
+ zfcp_dbf_rec_unit(id, ref, unit);
+ atomic_set_mask(mask, &unit->status);
+ } else {
+ if (status_change_clear(mask, &unit->status))
+ zfcp_dbf_rec_unit(id, ref, unit);
+ atomic_clear_mask(mask, &unit->status);
+ if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) {
+ atomic_set(&unit->erp_counter, 0);
+ }
+ }
+}
- debug_text_event(adapter->erp_dbf, 3, "p_access_denied");
- debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof(wwn_t));
- read_lock_irqsave(&zfcp_data.config_lock, flags);
- zfcp_erp_modify_port_status(port,
- ZFCP_STATUS_COMMON_ERP_FAILED |
- ZFCP_STATUS_COMMON_ACCESS_DENIED,
- ZFCP_SET);
- read_unlock_irqrestore(&zfcp_data.config_lock, flags);
+/**
+ * zfcp_erp_port_boxed - Mark port as "boxed" and start ERP
+ * @port: The "boxed" port.
+ * @id: The debug trace id.
+ * @id: Reference for the debug trace.
+ */
+void zfcp_erp_port_boxed(struct zfcp_port *port, char *id, void *ref)
+{
+ zfcp_erp_modify_port_status(port, id, ref,
+ ZFCP_STATUS_COMMON_ACCESS_BOXED, ZFCP_SET);
+ zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref);
}
-void
-zfcp_erp_unit_access_denied(struct zfcp_unit *unit)
+/**
+ * zfcp_erp_unit_boxed - Mark unit as "boxed" and start ERP
+ * @port: The "boxed" unit.
+ * @id: The debug trace id.
+ * @id: Reference for the debug trace.
+ */
+void zfcp_erp_unit_boxed(struct zfcp_unit *unit, char *id, void *ref)
{
- struct zfcp_adapter *adapter = unit->port->adapter;
+ zfcp_erp_modify_unit_status(unit, id, ref,
+ ZFCP_STATUS_COMMON_ACCESS_BOXED, ZFCP_SET);
+ zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref);
+}
- debug_text_event(adapter->erp_dbf, 3, "u_access_denied");
- debug_event(adapter->erp_dbf, 3, &unit->fcp_lun, sizeof(fcp_lun_t));
- zfcp_erp_modify_unit_status(unit,
- ZFCP_STATUS_COMMON_ERP_FAILED |
- ZFCP_STATUS_COMMON_ACCESS_DENIED,
- ZFCP_SET);
+/**
+ * zfcp_erp_port_access_denied - Adapter denied access to port.
+ * @port: port where access has been denied
+ * @id: id for debug trace
+ * @ref: reference for debug trace
+ *
+ * Since the adapter has denied access, stop using the port and the
+ * attached units.
+ */
+void zfcp_erp_port_access_denied(struct zfcp_port *port, char *id, void *ref)
+{
+ zfcp_erp_modify_port_status(port, id, ref,
+ ZFCP_STATUS_COMMON_ERP_FAILED |
+ ZFCP_STATUS_COMMON_ACCESS_DENIED, ZFCP_SET);
}
-void
-zfcp_erp_adapter_access_changed(struct zfcp_adapter *adapter)
+/**
+ * zfcp_erp_unit_access_denied - Adapter denied access to unit.
+ * @unit: unit where access has been denied
+ * @id: id for debug trace
+ * @ref: reference for debug trace
+ *
+ * Since the adapter has denied access, stop using the unit.
+ */
+void zfcp_erp_unit_access_denied(struct zfcp_unit *unit, char *id, void *ref)
{
- struct zfcp_port *port;
- unsigned long flags;
+ zfcp_erp_modify_unit_status(unit, id, ref,
+ ZFCP_STATUS_COMMON_ERP_FAILED |
+ ZFCP_STATUS_COMMON_ACCESS_DENIED, ZFCP_SET);
+}
- if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
+static void zfcp_erp_unit_access_changed(struct zfcp_unit *unit, char *id,
+ void *ref)
+{
+ int status = atomic_read(&unit->status);
+ if (!(status & (ZFCP_STATUS_COMMON_ACCESS_DENIED |
+ ZFCP_STATUS_COMMON_ACCESS_BOXED)))
return;
- debug_text_event(adapter->erp_dbf, 3, "a_access_recover");
- debug_event(adapter->erp_dbf, 3, zfcp_get_busid_by_adapter(adapter), 8);
-
- read_lock_irqsave(&zfcp_data.config_lock, flags);
- if (adapter->nameserver_port)
- zfcp_erp_port_access_changed(adapter->nameserver_port);
- list_for_each_entry(port, &adapter->port_list_head, list)
- if (port != adapter->nameserver_port)
- zfcp_erp_port_access_changed(port);
- read_unlock_irqrestore(&zfcp_data.config_lock, flags);
+ zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref);
}
-void
-zfcp_erp_port_access_changed(struct zfcp_port *port)
+static void zfcp_erp_port_access_changed(struct zfcp_port *port, char *id,
+ void *ref)
{
- struct zfcp_adapter *adapter = port->adapter;
struct zfcp_unit *unit;
-
- debug_text_event(adapter->erp_dbf, 3, "p_access_recover");
- debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof(wwn_t));
-
- if (!atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED,
- &port->status) &&
- !atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_BOXED,
- &port->status)) {
- if (!atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status))
- list_for_each_entry(unit, &port->unit_list_head, list)
- zfcp_erp_unit_access_changed(unit);
+ unsigned long flags;
+ int status = atomic_read(&port->status);
+
+ if (!(status & (ZFCP_STATUS_COMMON_ACCESS_DENIED |
+ ZFCP_STATUS_COMMON_ACCESS_BOXED))) {
+ read_lock_irqsave(&port->unit_list_lock, flags);
+ list_for_each_entry(unit, &port->unit_list, list)
+ zfcp_erp_unit_access_changed(unit, id, ref);
+ read_unlock_irqrestore(&port->unit_list_lock, flags);
return;
}
- ZFCP_LOG_NORMAL("reopen of port 0x%016Lx on adapter %s "
- "(due to ACT update)\n",
- port->wwpn, zfcp_get_busid_by_adapter(adapter));
- if (zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED) != 0)
- ZFCP_LOG_NORMAL("failed reopen of port"
- "(adapter %s, wwpn=0x%016Lx)\n",
- zfcp_get_busid_by_adapter(adapter), port->wwpn);
+ zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref);
}
-void
-zfcp_erp_unit_access_changed(struct zfcp_unit *unit)
+/**
+ * zfcp_erp_adapter_access_changed - Process change in adapter ACT
+ * @adapter: Adapter where the Access Control Table (ACT) changed
+ * @id: Id for debug trace
+ * @ref: Reference for debug trace
+ */
+void zfcp_erp_adapter_access_changed(struct zfcp_adapter *adapter, char *id,
+ void *ref)
{
- struct zfcp_adapter *adapter = unit->port->adapter;
-
- debug_text_event(adapter->erp_dbf, 3, "u_access_recover");
- debug_event(adapter->erp_dbf, 3, &unit->fcp_lun, sizeof(fcp_lun_t));
+ unsigned long flags;
+ struct zfcp_port *port;
- if (!atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED,
- &unit->status) &&
- !atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_BOXED,
- &unit->status))
+ if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
return;
- ZFCP_LOG_NORMAL("reopen of unit 0x%016Lx on port 0x%016Lx "
- " on adapter %s (due to ACT update)\n",
- unit->fcp_lun, unit->port->wwpn,
- zfcp_get_busid_by_adapter(adapter));
- if (zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED) != 0)
- ZFCP_LOG_NORMAL("failed reopen of unit (adapter %s, "
- "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n",
- zfcp_get_busid_by_adapter(adapter),
- unit->port->wwpn, unit->fcp_lun);
+ read_lock_irqsave(&adapter->port_list_lock, flags);
+ list_for_each_entry(port, &adapter->port_list, list)
+ zfcp_erp_port_access_changed(port, id, ref);
+ read_unlock_irqrestore(&adapter->port_list_lock, flags);
}
-
-#undef ZFCP_LOG_AREA
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff