2007-09-07 15:15:31 +08:00
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/*
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2008-06-11 00:20:58 +08:00
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* zfcp device driver
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2005-04-17 06:20:36 +08:00
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*
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2008-06-11 00:20:58 +08:00
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* Error Recovery Procedures (ERP).
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2007-09-07 15:15:31 +08:00
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*
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2008-06-11 00:20:58 +08:00
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* Copyright IBM Corporation 2002, 2008
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2005-04-17 06:20:36 +08:00
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*/
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#include "zfcp_ext.h"
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2008-07-02 16:56:40 +08:00
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#define ZFCP_MAX_ERPS 3
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enum zfcp_erp_act_flags {
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ZFCP_STATUS_ERP_TIMEDOUT = 0x10000000,
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ZFCP_STATUS_ERP_CLOSE_ONLY = 0x01000000,
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ZFCP_STATUS_ERP_DISMISSING = 0x00100000,
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ZFCP_STATUS_ERP_DISMISSED = 0x00200000,
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ZFCP_STATUS_ERP_LOWMEM = 0x00400000,
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};
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2005-04-17 06:20:36 +08:00
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2008-07-02 16:56:40 +08:00
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enum zfcp_erp_steps {
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ZFCP_ERP_STEP_UNINITIALIZED = 0x0000,
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ZFCP_ERP_STEP_FSF_XCONFIG = 0x0001,
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ZFCP_ERP_STEP_PHYS_PORT_CLOSING = 0x0010,
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ZFCP_ERP_STEP_PORT_CLOSING = 0x0100,
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ZFCP_ERP_STEP_NAMESERVER_OPEN = 0x0200,
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ZFCP_ERP_STEP_NAMESERVER_LOOKUP = 0x0400,
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ZFCP_ERP_STEP_PORT_OPENING = 0x0800,
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ZFCP_ERP_STEP_UNIT_CLOSING = 0x1000,
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ZFCP_ERP_STEP_UNIT_OPENING = 0x2000,
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};
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enum zfcp_erp_act_type {
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ZFCP_ERP_ACTION_REOPEN_UNIT = 1,
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ZFCP_ERP_ACTION_REOPEN_PORT = 2,
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ZFCP_ERP_ACTION_REOPEN_PORT_FORCED = 3,
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ZFCP_ERP_ACTION_REOPEN_ADAPTER = 4,
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};
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enum zfcp_erp_act_state {
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ZFCP_ERP_ACTION_RUNNING = 1,
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ZFCP_ERP_ACTION_READY = 2,
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};
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enum zfcp_erp_act_result {
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ZFCP_ERP_SUCCEEDED = 0,
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ZFCP_ERP_FAILED = 1,
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ZFCP_ERP_CONTINUES = 2,
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ZFCP_ERP_EXIT = 3,
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ZFCP_ERP_DISMISSED = 4,
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ZFCP_ERP_NOMEM = 5,
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};
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static void zfcp_erp_adapter_block(struct zfcp_adapter *adapter, int mask)
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2005-04-17 06:20:36 +08:00
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{
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2008-07-02 16:56:40 +08:00
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zfcp_erp_modify_adapter_status(adapter, 15, NULL,
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ZFCP_STATUS_COMMON_UNBLOCKED | mask,
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ZFCP_CLEAR);
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2006-09-19 04:29:56 +08:00
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}
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2005-04-17 06:20:36 +08:00
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2008-07-02 16:56:40 +08:00
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static int zfcp_erp_action_exists(struct zfcp_erp_action *act)
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2006-09-19 04:29:56 +08:00
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{
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2008-07-02 16:56:40 +08:00
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struct zfcp_erp_action *curr_act;
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list_for_each_entry(curr_act, &act->adapter->erp_running_head, list)
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if (act == curr_act)
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return ZFCP_ERP_ACTION_RUNNING;
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return 0;
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2005-04-17 06:20:36 +08:00
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}
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2008-07-02 16:56:40 +08:00
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static void zfcp_erp_action_ready(struct zfcp_erp_action *act)
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2006-09-19 04:29:56 +08:00
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{
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2008-07-02 16:56:40 +08:00
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struct zfcp_adapter *adapter = act->adapter;
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list_move(&act->list, &act->adapter->erp_ready_head);
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zfcp_rec_dbf_event_action(146, act);
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up(&adapter->erp_ready_sem);
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zfcp_rec_dbf_event_thread(2, adapter);
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2006-09-19 04:29:56 +08:00
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}
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2008-07-02 16:56:40 +08:00
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static void zfcp_erp_action_dismiss(struct zfcp_erp_action *act)
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2005-04-17 06:20:36 +08:00
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{
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2008-07-02 16:56:40 +08:00
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act->status |= ZFCP_STATUS_ERP_DISMISSED;
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if (zfcp_erp_action_exists(act) == ZFCP_ERP_ACTION_RUNNING)
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zfcp_erp_action_ready(act);
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}
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2005-04-17 06:20:36 +08:00
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2008-07-02 16:56:40 +08:00
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static void zfcp_erp_action_dismiss_unit(struct zfcp_unit *unit)
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{
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if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_INUSE)
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zfcp_erp_action_dismiss(&unit->erp_action);
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}
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2005-04-17 06:20:36 +08:00
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2008-07-02 16:56:40 +08:00
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static void zfcp_erp_action_dismiss_port(struct zfcp_port *port)
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{
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struct zfcp_unit *unit;
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2005-04-17 06:20:36 +08:00
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2008-07-02 16:56:40 +08:00
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if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_INUSE)
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zfcp_erp_action_dismiss(&port->erp_action);
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else
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list_for_each_entry(unit, &port->unit_list_head, list)
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zfcp_erp_action_dismiss_unit(unit);
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2005-04-17 06:20:36 +08:00
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}
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2008-07-02 16:56:40 +08:00
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static void zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *adapter)
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2005-04-17 06:20:36 +08:00
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{
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2008-07-02 16:56:40 +08:00
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struct zfcp_port *port;
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2005-04-17 06:20:36 +08:00
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2008-07-02 16:56:40 +08:00
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if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_INUSE)
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zfcp_erp_action_dismiss(&adapter->erp_action);
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else
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list_for_each_entry(port, &adapter->port_list_head, list)
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zfcp_erp_action_dismiss_port(port);
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2005-04-17 06:20:36 +08:00
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}
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2008-07-02 16:56:40 +08:00
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static int zfcp_erp_required_act(int want, struct zfcp_adapter *adapter,
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struct zfcp_port *port,
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struct zfcp_unit *unit)
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2005-04-17 06:20:36 +08:00
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{
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2008-07-02 16:56:40 +08:00
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int need = want;
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int u_status, p_status, a_status;
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2005-04-17 06:20:36 +08:00
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2008-07-02 16:56:40 +08:00
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switch (want) {
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case ZFCP_ERP_ACTION_REOPEN_UNIT:
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u_status = atomic_read(&unit->status);
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if (u_status & ZFCP_STATUS_COMMON_ERP_INUSE)
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return 0;
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p_status = atomic_read(&port->status);
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if (!(p_status & ZFCP_STATUS_COMMON_RUNNING) ||
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p_status & ZFCP_STATUS_COMMON_ERP_FAILED)
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return 0;
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if (!(p_status & ZFCP_STATUS_COMMON_UNBLOCKED))
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need = ZFCP_ERP_ACTION_REOPEN_PORT;
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/* fall through */
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case ZFCP_ERP_ACTION_REOPEN_PORT:
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case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
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p_status = atomic_read(&port->status);
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if (p_status & ZFCP_STATUS_COMMON_ERP_INUSE)
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return 0;
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a_status = atomic_read(&adapter->status);
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if (!(a_status & ZFCP_STATUS_COMMON_RUNNING) ||
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a_status & ZFCP_STATUS_COMMON_ERP_FAILED)
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return 0;
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if (!(a_status & ZFCP_STATUS_COMMON_UNBLOCKED))
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need = ZFCP_ERP_ACTION_REOPEN_ADAPTER;
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/* fall through */
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case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
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a_status = atomic_read(&adapter->status);
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if (a_status & ZFCP_STATUS_COMMON_ERP_INUSE)
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return 0;
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}
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2005-04-17 06:20:36 +08:00
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2008-07-02 16:56:40 +08:00
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return need;
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2005-04-17 06:20:36 +08:00
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}
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2008-07-02 16:56:40 +08:00
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static struct zfcp_erp_action *zfcp_erp_setup_act(int need,
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struct zfcp_adapter *adapter,
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struct zfcp_port *port,
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struct zfcp_unit *unit)
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2005-04-17 06:20:36 +08:00
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{
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2008-07-02 16:56:40 +08:00
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struct zfcp_erp_action *erp_action;
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u32 status = 0;
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2005-04-17 06:20:36 +08:00
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2008-07-02 16:56:40 +08:00
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switch (need) {
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case ZFCP_ERP_ACTION_REOPEN_UNIT:
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zfcp_unit_get(unit);
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atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status);
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erp_action = &unit->erp_action;
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if (!(atomic_read(&unit->status) & ZFCP_STATUS_COMMON_RUNNING))
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status = ZFCP_STATUS_ERP_CLOSE_ONLY;
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break;
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2005-04-17 06:20:36 +08:00
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2008-07-02 16:56:40 +08:00
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case ZFCP_ERP_ACTION_REOPEN_PORT:
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case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
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zfcp_port_get(port);
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zfcp_erp_action_dismiss_port(port);
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atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status);
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erp_action = &port->erp_action;
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if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_RUNNING))
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status = ZFCP_STATUS_ERP_CLOSE_ONLY;
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break;
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2005-04-17 06:20:36 +08:00
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2008-07-02 16:56:40 +08:00
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case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
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zfcp_adapter_get(adapter);
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zfcp_erp_action_dismiss_adapter(adapter);
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atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status);
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erp_action = &adapter->erp_action;
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if (!(atomic_read(&adapter->status) &
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ZFCP_STATUS_COMMON_RUNNING))
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status = ZFCP_STATUS_ERP_CLOSE_ONLY;
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break;
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default:
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return NULL;
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}
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2005-04-17 06:20:36 +08:00
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2008-07-02 16:56:40 +08:00
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memset(erp_action, 0, sizeof(struct zfcp_erp_action));
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erp_action->adapter = adapter;
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erp_action->port = port;
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erp_action->unit = unit;
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erp_action->action = need;
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erp_action->status = status;
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2005-04-17 06:20:36 +08:00
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2008-07-02 16:56:40 +08:00
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return erp_action;
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2005-04-17 06:20:36 +08:00
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}
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2008-07-02 16:56:40 +08:00
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static int zfcp_erp_action_enqueue(int want, struct zfcp_adapter *adapter,
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struct zfcp_port *port,
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struct zfcp_unit *unit, u8 id, void *ref)
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2005-04-17 06:20:36 +08:00
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{
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2008-07-02 16:56:40 +08:00
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int retval = 1, need;
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struct zfcp_erp_action *act = NULL;
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2005-04-17 06:20:36 +08:00
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2008-07-02 16:56:40 +08:00
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if (!(atomic_read(&adapter->status) &
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ZFCP_STATUS_ADAPTER_ERP_THREAD_UP))
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return -EIO;
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2005-04-17 06:20:36 +08:00
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2008-07-02 16:56:40 +08:00
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need = zfcp_erp_required_act(want, adapter, port, unit);
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if (!need)
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2005-04-17 06:20:36 +08:00
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goto out;
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2008-07-02 16:56:40 +08:00
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atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, &adapter->status);
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act = zfcp_erp_setup_act(need, adapter, port, unit);
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if (!act)
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goto out;
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++adapter->erp_total_count;
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list_add_tail(&act->list, &adapter->erp_ready_head);
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up(&adapter->erp_ready_sem);
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zfcp_rec_dbf_event_thread(1, adapter);
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retval = 0;
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2005-04-17 06:20:36 +08:00
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out:
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2008-07-02 16:56:40 +08:00
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zfcp_rec_dbf_event_trigger(id, ref, want, need, act,
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adapter, port, unit);
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2005-04-17 06:20:36 +08:00
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return retval;
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}
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2008-07-02 16:56:40 +08:00
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static int _zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter,
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int clear_mask, u8 id, void *ref)
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{
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zfcp_erp_adapter_block(adapter, clear_mask);
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/* ensure propagation of failed status to new devices */
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if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
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zfcp_erp_adapter_failed(adapter, 13, NULL);
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return -EIO;
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}
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return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER,
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adapter, NULL, NULL, id, ref);
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}
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/**
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* zfcp_erp_adapter_reopen - Reopen adapter.
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* @adapter: Adapter to reopen.
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* @clear: Status flags to clear.
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* @id: Id for debug trace event.
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* @ref: Reference for debug trace event.
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2005-04-17 06:20:36 +08:00
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*/
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2008-07-02 16:56:40 +08:00
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void zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, int clear,
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u8 id, void *ref)
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2005-04-17 06:20:36 +08:00
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{
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unsigned long flags;
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read_lock_irqsave(&zfcp_data.config_lock, flags);
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write_lock(&adapter->erp_lock);
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2008-07-02 16:56:40 +08:00
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_zfcp_erp_adapter_reopen(adapter, clear, id, ref);
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2005-04-17 06:20:36 +08:00
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write_unlock(&adapter->erp_lock);
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read_unlock_irqrestore(&zfcp_data.config_lock, flags);
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2008-07-02 16:56:40 +08:00
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}
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2005-04-17 06:20:36 +08:00
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2008-07-02 16:56:40 +08:00
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/**
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* zfcp_erp_adapter_shutdown - Shutdown adapter.
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* @adapter: Adapter to shut down.
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* @clear: Status flags to clear.
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* @id: Id for debug trace event.
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* @ref: Reference for debug trace event.
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*/
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void zfcp_erp_adapter_shutdown(struct zfcp_adapter *adapter, int clear,
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u8 id, void *ref)
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{
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int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED;
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zfcp_erp_adapter_reopen(adapter, clear | flags, id, ref);
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2005-04-17 06:20:36 +08:00
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}
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2008-07-02 16:56:40 +08:00
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/**
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* zfcp_erp_port_shutdown - Shutdown port
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* @port: Port to shut down.
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* @clear: Status flags to clear.
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|
|
* @id: Id for debug trace event.
|
|
|
|
* @ref: Reference for debug trace event.
|
2005-04-17 06:20:36 +08:00
|
|
|
*/
|
2008-07-02 16:56:40 +08:00
|
|
|
void zfcp_erp_port_shutdown(struct zfcp_port *port, int clear, u8 id, void *ref)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED;
|
|
|
|
zfcp_erp_port_reopen(port, clear | flags, id, ref);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* 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, u8 id, void *ref)
|
|
|
|
{
|
|
|
|
int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED;
|
|
|
|
zfcp_erp_unit_reopen(unit, clear | flags, id, ref);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void zfcp_erp_port_block(struct zfcp_port *port, int clear)
|
|
|
|
{
|
|
|
|
zfcp_erp_modify_port_status(port, 17, NULL,
|
|
|
|
ZFCP_STATUS_COMMON_UNBLOCKED | clear,
|
|
|
|
ZFCP_CLEAR);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void _zfcp_erp_port_forced_reopen(struct zfcp_port *port,
|
|
|
|
int clear, u8 id, void *ref)
|
|
|
|
{
|
|
|
|
zfcp_erp_port_block(port, clear);
|
|
|
|
|
|
|
|
if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
|
|
|
|
return;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT_FORCED,
|
|
|
|
port->adapter, port, NULL, id, ref);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* 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.
|
|
|
|
*/
|
|
|
|
void zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear, u8 id,
|
|
|
|
void *ref)
|
|
|
|
{
|
|
|
|
unsigned long flags;
|
|
|
|
struct zfcp_adapter *adapter = port->adapter;
|
|
|
|
|
|
|
|
read_lock_irqsave(&zfcp_data.config_lock, flags);
|
|
|
|
write_lock(&adapter->erp_lock);
|
|
|
|
_zfcp_erp_port_forced_reopen(port, clear, id, ref);
|
|
|
|
write_unlock(&adapter->erp_lock);
|
|
|
|
read_unlock_irqrestore(&zfcp_data.config_lock, flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int _zfcp_erp_port_reopen(struct zfcp_port *port, int clear, u8 id,
|
|
|
|
void *ref)
|
|
|
|
{
|
|
|
|
zfcp_erp_port_block(port, clear);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
|
2005-04-17 06:20:36 +08:00
|
|
|
/* ensure propagation of failed status to new devices */
|
2008-04-18 18:51:55 +08:00
|
|
|
zfcp_erp_port_failed(port, 14, NULL);
|
2008-07-02 16:56:40 +08:00
|
|
|
return -EIO;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT,
|
|
|
|
port->adapter, port, NULL, id, ref);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2008-07-02 16:56:40 +08:00
|
|
|
* zfcp_erp_port_reopen - trigger remote port recovery
|
|
|
|
* @port: port to recover
|
|
|
|
* @clear_mask: flags in port status to be cleared
|
2005-04-17 06:20:36 +08:00
|
|
|
*
|
2008-07-02 16:56:40 +08:00
|
|
|
* Returns 0 if recovery has been triggered, < 0 if not.
|
2005-04-17 06:20:36 +08:00
|
|
|
*/
|
2008-07-02 16:56:40 +08:00
|
|
|
int zfcp_erp_port_reopen(struct zfcp_port *port, int clear, u8 id, void *ref)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
unsigned long flags;
|
2008-07-02 16:56:40 +08:00
|
|
|
int retval;
|
2005-04-17 06:20:36 +08:00
|
|
|
struct zfcp_adapter *adapter = port->adapter;
|
|
|
|
|
|
|
|
read_lock_irqsave(&zfcp_data.config_lock, flags);
|
|
|
|
write_lock(&adapter->erp_lock);
|
2008-07-02 16:56:40 +08:00
|
|
|
retval = _zfcp_erp_port_reopen(port, clear, id, ref);
|
2005-04-17 06:20:36 +08:00
|
|
|
write_unlock(&adapter->erp_lock);
|
|
|
|
read_unlock_irqrestore(&zfcp_data.config_lock, flags);
|
|
|
|
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static void zfcp_erp_unit_block(struct zfcp_unit *unit, int clear_mask)
|
|
|
|
{
|
|
|
|
zfcp_erp_modify_unit_status(unit, 19, NULL,
|
|
|
|
ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask,
|
|
|
|
ZFCP_CLEAR);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void _zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear, u8 id,
|
|
|
|
void *ref)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
struct zfcp_adapter *adapter = unit->port->adapter;
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
zfcp_erp_unit_block(unit, clear);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
|
|
|
|
return;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_UNIT,
|
|
|
|
adapter, unit->port, unit, id, ref);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* zfcp_erp_unit_reopen - initiate reopen of a unit
|
|
|
|
* @unit: unit to be reopened
|
|
|
|
* @clear_mask: specifies flags in unit status to be cleared
|
|
|
|
* Return: 0 on success, < 0 on error
|
|
|
|
*/
|
2008-07-02 16:56:40 +08:00
|
|
|
void zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear, u8 id, void *ref)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
unsigned long flags;
|
2008-07-02 16:56:40 +08:00
|
|
|
struct zfcp_port *port = unit->port;
|
|
|
|
struct zfcp_adapter *adapter = port->adapter;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
read_lock_irqsave(&zfcp_data.config_lock, flags);
|
|
|
|
write_lock(&adapter->erp_lock);
|
2008-07-02 16:56:40 +08:00
|
|
|
_zfcp_erp_unit_reopen(unit, clear, id, ref);
|
2005-04-17 06:20:36 +08:00
|
|
|
write_unlock(&adapter->erp_lock);
|
|
|
|
read_unlock_irqrestore(&zfcp_data.config_lock, flags);
|
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int status_change_set(unsigned long mask, atomic_t *status)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
return (atomic_read(status) ^ mask) & mask;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int status_change_clear(unsigned long mask, atomic_t *status)
|
2008-03-27 21:22:02 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
return atomic_read(status) & mask;
|
2008-03-27 21:22:02 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static void zfcp_erp_adapter_unblock(struct zfcp_adapter *adapter)
|
2008-03-27 21:22:02 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status))
|
|
|
|
zfcp_rec_dbf_event_adapter(16, NULL, adapter);
|
|
|
|
atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status);
|
2008-03-27 21:22:02 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static void zfcp_erp_port_unblock(struct zfcp_port *port)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status))
|
|
|
|
zfcp_rec_dbf_event_port(18, NULL, port);
|
|
|
|
atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static void zfcp_erp_unit_unblock(struct zfcp_unit *unit)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status))
|
|
|
|
zfcp_rec_dbf_event_unit(20, NULL, unit);
|
|
|
|
atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static void zfcp_erp_action_to_running(struct zfcp_erp_action *erp_action)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
list_move(&erp_action->list, &erp_action->adapter->erp_running_head);
|
|
|
|
zfcp_rec_dbf_event_action(145, erp_action);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static void zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *act)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
struct zfcp_adapter *adapter = act->adapter;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
if (!act->fsf_req)
|
|
|
|
return;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
spin_lock(&adapter->req_list_lock);
|
|
|
|
if (zfcp_reqlist_find_safe(adapter, act->fsf_req) &&
|
|
|
|
act->fsf_req->erp_action == act) {
|
|
|
|
if (act->status & (ZFCP_STATUS_ERP_DISMISSED |
|
|
|
|
ZFCP_STATUS_ERP_TIMEDOUT)) {
|
|
|
|
act->fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
|
|
|
|
zfcp_rec_dbf_event_action(142, act);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2008-07-02 16:56:40 +08:00
|
|
|
if (act->status & ZFCP_STATUS_ERP_TIMEDOUT)
|
|
|
|
zfcp_rec_dbf_event_action(143, act);
|
|
|
|
if (act->fsf_req->status & (ZFCP_STATUS_FSFREQ_COMPLETED |
|
|
|
|
ZFCP_STATUS_FSFREQ_DISMISSED))
|
|
|
|
act->fsf_req = NULL;
|
|
|
|
} else
|
|
|
|
act->fsf_req = NULL;
|
|
|
|
spin_unlock(&adapter->req_list_lock);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
/**
|
|
|
|
* zfcp_erp_notify - Trigger ERP action.
|
|
|
|
* @erp_action: ERP action to continue.
|
|
|
|
* @set_mask: ERP action status flags to set.
|
2005-04-17 06:20:36 +08:00
|
|
|
*/
|
2008-07-02 16:56:40 +08:00
|
|
|
void zfcp_erp_notify(struct zfcp_erp_action *erp_action, unsigned long set_mask)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
struct zfcp_adapter *adapter = erp_action->adapter;
|
2008-07-02 16:56:40 +08:00
|
|
|
unsigned long flags;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
write_lock_irqsave(&adapter->erp_lock, flags);
|
2005-04-17 06:20:36 +08:00
|
|
|
if (zfcp_erp_action_exists(erp_action) == ZFCP_ERP_ACTION_RUNNING) {
|
|
|
|
erp_action->status |= set_mask;
|
|
|
|
zfcp_erp_action_ready(erp_action);
|
|
|
|
}
|
|
|
|
write_unlock_irqrestore(&adapter->erp_lock, flags);
|
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
/**
|
|
|
|
* zfcp_erp_timeout_handler - Trigger ERP action from timed out ERP request
|
|
|
|
* @data: ERP action (from timer data)
|
2005-04-17 06:20:36 +08:00
|
|
|
*/
|
2008-07-02 16:56:40 +08:00
|
|
|
void zfcp_erp_timeout_handler(unsigned long data)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
struct zfcp_erp_action *act = (struct zfcp_erp_action *) data;
|
|
|
|
zfcp_erp_notify(act, ZFCP_STATUS_ERP_TIMEDOUT);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static void zfcp_erp_memwait_handler(unsigned long data)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
zfcp_erp_notify((struct zfcp_erp_action *)data, 0);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static void zfcp_erp_strategy_memwait(struct zfcp_erp_action *erp_action)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
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);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static void _zfcp_erp_port_reopen_all(struct zfcp_adapter *adapter,
|
|
|
|
int clear, u8 id, void *ref)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
struct zfcp_port *port;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
list_for_each_entry(port, &adapter->port_list_head, list)
|
|
|
|
if (!(atomic_read(&port->status) & ZFCP_STATUS_PORT_WKA))
|
|
|
|
_zfcp_erp_port_reopen(port, clear, id, ref);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static void _zfcp_erp_unit_reopen_all(struct zfcp_port *port, int clear, u8 id,
|
|
|
|
void *ref)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
struct zfcp_unit *unit;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
list_for_each_entry(unit, &port->unit_list_head, list)
|
|
|
|
_zfcp_erp_unit_reopen(unit, clear, id, ref);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static void zfcp_erp_strategy_followup_actions(struct zfcp_erp_action *act)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
struct zfcp_adapter *adapter = act->adapter;
|
|
|
|
struct zfcp_port *port = act->port;
|
|
|
|
struct zfcp_unit *unit = act->unit;
|
|
|
|
u32 status = act->status;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
/* initiate follow-up actions depending on success of finished action */
|
|
|
|
switch (act->action) {
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
|
|
|
|
if (status == ZFCP_ERP_SUCCEEDED)
|
|
|
|
_zfcp_erp_port_reopen_all(adapter, 0, 70, NULL);
|
|
|
|
else
|
|
|
|
_zfcp_erp_adapter_reopen(adapter, 0, 71, NULL);
|
|
|
|
break;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
|
|
|
|
if (status == ZFCP_ERP_SUCCEEDED)
|
|
|
|
_zfcp_erp_port_reopen(port, 0, 72, NULL);
|
|
|
|
else
|
|
|
|
_zfcp_erp_adapter_reopen(adapter, 0, 73, NULL);
|
|
|
|
break;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
case ZFCP_ERP_ACTION_REOPEN_PORT:
|
|
|
|
if (status == ZFCP_ERP_SUCCEEDED)
|
|
|
|
_zfcp_erp_unit_reopen_all(port, 0, 74, NULL);
|
|
|
|
else
|
|
|
|
_zfcp_erp_port_forced_reopen(port, 0, 75, NULL);
|
|
|
|
break;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
case ZFCP_ERP_ACTION_REOPEN_UNIT:
|
|
|
|
if (status != ZFCP_ERP_SUCCEEDED)
|
|
|
|
_zfcp_erp_port_reopen(unit->port, 0, 76, NULL);
|
|
|
|
break;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static void zfcp_erp_wakeup(struct zfcp_adapter *adapter)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
read_lock_irqsave(&zfcp_data.config_lock, flags);
|
2008-07-02 16:56:40 +08:00
|
|
|
read_lock(&adapter->erp_lock);
|
|
|
|
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);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2008-07-02 16:56:40 +08:00
|
|
|
read_unlock(&adapter->erp_lock);
|
|
|
|
read_unlock_irqrestore(&zfcp_data.config_lock, flags);
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *act)
|
|
|
|
{
|
|
|
|
if (zfcp_qdio_open(act->adapter))
|
|
|
|
return ZFCP_ERP_FAILED;
|
|
|
|
init_waitqueue_head(&act->adapter->request_wq);
|
|
|
|
atomic_set_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &act->adapter->status);
|
|
|
|
return ZFCP_ERP_SUCCEEDED;
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
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, 150, NULL);
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int zfcp_erp_adapter_strat_fsf_xconf(struct zfcp_erp_action *erp_action)
|
|
|
|
{
|
|
|
|
int retries;
|
|
|
|
int sleep = 1;
|
|
|
|
struct zfcp_adapter *adapter = erp_action->adapter;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status);
|
|
|
|
|
|
|
|
for (retries = 7; retries; retries--) {
|
|
|
|
atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
|
|
|
|
&adapter->status);
|
|
|
|
write_lock_irq(&adapter->erp_lock);
|
|
|
|
zfcp_erp_action_to_running(erp_action);
|
|
|
|
write_unlock_irq(&adapter->erp_lock);
|
|
|
|
if (zfcp_fsf_exchange_config_data(erp_action)) {
|
|
|
|
atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
|
|
|
|
&adapter->status);
|
|
|
|
return ZFCP_ERP_FAILED;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
zfcp_rec_dbf_event_thread_lock(6, adapter);
|
|
|
|
down(&adapter->erp_ready_sem);
|
|
|
|
zfcp_rec_dbf_event_thread_lock(7, adapter);
|
|
|
|
if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT)
|
|
|
|
break;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
if (!(atomic_read(&adapter->status) &
|
|
|
|
ZFCP_STATUS_ADAPTER_HOST_CON_INIT))
|
|
|
|
break;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
ssleep(sleep);
|
|
|
|
sleep *= 2;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
|
|
|
|
&adapter->status);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_XCONFIG_OK))
|
|
|
|
return ZFCP_ERP_FAILED;
|
2007-09-07 15:15:31 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP)
|
|
|
|
zfcp_erp_enqueue_ptp_port(adapter);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
return ZFCP_ERP_SUCCEEDED;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *act)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
int ret;
|
|
|
|
struct zfcp_adapter *adapter = act->adapter;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
write_lock_irq(&adapter->erp_lock);
|
|
|
|
zfcp_erp_action_to_running(act);
|
|
|
|
write_unlock_irq(&adapter->erp_lock);
|
|
|
|
|
|
|
|
ret = zfcp_fsf_exchange_port_data(act);
|
|
|
|
if (ret == -EOPNOTSUPP)
|
|
|
|
return ZFCP_ERP_SUCCEEDED;
|
|
|
|
if (ret)
|
|
|
|
return ZFCP_ERP_FAILED;
|
|
|
|
|
|
|
|
zfcp_rec_dbf_event_thread_lock(8, adapter);
|
|
|
|
down(&adapter->erp_ready_sem);
|
|
|
|
zfcp_rec_dbf_event_thread_lock(9, adapter);
|
|
|
|
if (act->status & ZFCP_STATUS_ERP_TIMEDOUT)
|
|
|
|
return ZFCP_ERP_FAILED;
|
|
|
|
|
|
|
|
return ZFCP_ERP_SUCCEEDED;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *act)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
if (zfcp_erp_adapter_strat_fsf_xconf(act) == ZFCP_ERP_FAILED)
|
|
|
|
return ZFCP_ERP_FAILED;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
if (zfcp_erp_adapter_strategy_open_fsf_xport(act) == ZFCP_ERP_FAILED)
|
|
|
|
return ZFCP_ERP_FAILED;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
atomic_set(&act->adapter->stat_miss, 16);
|
|
|
|
if (zfcp_status_read_refill(act->adapter))
|
|
|
|
return ZFCP_ERP_FAILED;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
return ZFCP_ERP_SUCCEEDED;
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int zfcp_erp_adapter_strategy_generic(struct zfcp_erp_action *act,
|
|
|
|
int close)
|
|
|
|
{
|
|
|
|
int retval = ZFCP_ERP_SUCCEEDED;
|
|
|
|
struct zfcp_adapter *adapter = act->adapter;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
if (close)
|
|
|
|
goto close_only;
|
|
|
|
|
|
|
|
retval = zfcp_erp_adapter_strategy_open_qdio(act);
|
|
|
|
if (retval != ZFCP_ERP_SUCCEEDED)
|
|
|
|
goto failed_qdio;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
retval = zfcp_erp_adapter_strategy_open_fsf(act);
|
|
|
|
if (retval != ZFCP_ERP_SUCCEEDED)
|
|
|
|
goto failed_openfcp;
|
|
|
|
|
|
|
|
atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &act->adapter->status);
|
|
|
|
schedule_work(&act->adapter->scan_work);
|
|
|
|
|
|
|
|
return ZFCP_ERP_SUCCEEDED;
|
|
|
|
|
|
|
|
close_only:
|
|
|
|
atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
|
|
|
|
&act->adapter->status);
|
|
|
|
|
|
|
|
failed_openfcp:
|
|
|
|
/* close queues to ensure that buffers are not accessed by adapter */
|
|
|
|
zfcp_qdio_close(adapter);
|
|
|
|
zfcp_fsf_req_dismiss_all(adapter);
|
|
|
|
adapter->fsf_req_seq_no = 0;
|
|
|
|
/* all ports and units are closed */
|
|
|
|
zfcp_erp_modify_adapter_status(adapter, 24, NULL,
|
|
|
|
ZFCP_STATUS_COMMON_OPEN, ZFCP_CLEAR);
|
|
|
|
failed_qdio:
|
|
|
|
atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK |
|
2008-10-01 18:42:16 +08:00
|
|
|
ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
|
2008-07-02 16:56:40 +08:00
|
|
|
&act->adapter->status);
|
2005-04-17 06:20:36 +08:00
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int zfcp_erp_adapter_strategy(struct zfcp_erp_action *act)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
int retval;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
zfcp_erp_adapter_strategy_generic(act, 1); /* close */
|
|
|
|
if (act->status & ZFCP_STATUS_ERP_CLOSE_ONLY)
|
|
|
|
return ZFCP_ERP_EXIT;
|
|
|
|
|
|
|
|
retval = zfcp_erp_adapter_strategy_generic(act, 0); /* open */
|
|
|
|
|
|
|
|
if (retval == ZFCP_ERP_FAILED)
|
|
|
|
ssleep(8);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *act)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
int 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;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static void zfcp_erp_port_strategy_clearstati(struct zfcp_port *port)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-10-01 18:42:16 +08:00
|
|
|
atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
|
2008-07-02 16:56:40 +08:00
|
|
|
ZFCP_STATUS_PORT_DID_DID |
|
|
|
|
ZFCP_STATUS_PORT_PHYS_CLOSING |
|
|
|
|
ZFCP_STATUS_PORT_INVALID_WWPN,
|
|
|
|
&port->status);
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
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);
|
|
|
|
|
|
|
|
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;
|
|
|
|
|
|
|
|
case ZFCP_ERP_STEP_PHYS_PORT_CLOSING:
|
|
|
|
if (status & ZFCP_STATUS_PORT_PHYS_OPEN)
|
|
|
|
return ZFCP_ERP_SUCCEEDED;
|
|
|
|
}
|
|
|
|
return ZFCP_ERP_FAILED;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int zfcp_erp_port_strategy_close(struct zfcp_erp_action *erp_action)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
int retval;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
retval = zfcp_fsf_close_port(erp_action);
|
|
|
|
if (retval == -ENOMEM)
|
|
|
|
return ZFCP_ERP_NOMEM;
|
|
|
|
erp_action->step = ZFCP_ERP_STEP_PORT_CLOSING;
|
|
|
|
if (retval)
|
|
|
|
return ZFCP_ERP_FAILED;
|
|
|
|
return ZFCP_ERP_CONTINUES;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *erp_action)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
int retval;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
retval = zfcp_fsf_open_port(erp_action);
|
|
|
|
if (retval == -ENOMEM)
|
|
|
|
return ZFCP_ERP_NOMEM;
|
|
|
|
erp_action->step = ZFCP_ERP_STEP_PORT_OPENING;
|
|
|
|
if (retval)
|
|
|
|
return ZFCP_ERP_FAILED;
|
|
|
|
return ZFCP_ERP_CONTINUES;
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static void zfcp_erp_port_strategy_open_ns_wake(struct zfcp_erp_action *ns_act)
|
|
|
|
{
|
|
|
|
unsigned long flags;
|
|
|
|
struct zfcp_adapter *adapter = ns_act->adapter;
|
|
|
|
struct zfcp_erp_action *act, *tmp;
|
|
|
|
int status;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
read_lock_irqsave(&adapter->erp_lock, flags);
|
|
|
|
list_for_each_entry_safe(act, tmp, &adapter->erp_running_head, list) {
|
|
|
|
if (act->step == ZFCP_ERP_STEP_NAMESERVER_OPEN) {
|
|
|
|
status = atomic_read(&adapter->nameserver_port->status);
|
|
|
|
if (status & ZFCP_STATUS_COMMON_ERP_FAILED)
|
|
|
|
zfcp_erp_port_failed(act->port, 27, NULL);
|
|
|
|
zfcp_erp_action_ready(act);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
read_unlock_irqrestore(&adapter->erp_lock, flags);
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int zfcp_erp_port_strategy_open_nameserver(struct zfcp_erp_action *act)
|
|
|
|
{
|
|
|
|
int retval;
|
|
|
|
|
|
|
|
switch (act->step) {
|
|
|
|
case ZFCP_ERP_STEP_UNINITIALIZED:
|
|
|
|
case ZFCP_ERP_STEP_PHYS_PORT_CLOSING:
|
|
|
|
case ZFCP_ERP_STEP_PORT_CLOSING:
|
|
|
|
return zfcp_erp_port_strategy_open_port(act);
|
|
|
|
|
|
|
|
case ZFCP_ERP_STEP_PORT_OPENING:
|
|
|
|
if (atomic_read(&act->port->status) & ZFCP_STATUS_COMMON_OPEN)
|
|
|
|
retval = ZFCP_ERP_SUCCEEDED;
|
|
|
|
else
|
|
|
|
retval = ZFCP_ERP_FAILED;
|
|
|
|
/* this is needed anyway */
|
|
|
|
zfcp_erp_port_strategy_open_ns_wake(act);
|
|
|
|
return retval;
|
|
|
|
|
|
|
|
default:
|
|
|
|
return ZFCP_ERP_FAILED;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2008-07-02 16:56:40 +08:00
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int zfcp_erp_port_strategy_open_lookup(struct zfcp_erp_action *act)
|
|
|
|
{
|
|
|
|
int retval;
|
|
|
|
|
|
|
|
retval = zfcp_fc_ns_gid_pn_request(act);
|
|
|
|
if (retval == -ENOMEM)
|
|
|
|
return ZFCP_ERP_NOMEM;
|
|
|
|
act->step = ZFCP_ERP_STEP_NAMESERVER_LOOKUP;
|
|
|
|
if (retval)
|
|
|
|
return ZFCP_ERP_FAILED;
|
|
|
|
return ZFCP_ERP_CONTINUES;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int zfcp_erp_open_ptp_port(struct zfcp_erp_action *act)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
struct zfcp_adapter *adapter = act->adapter;
|
|
|
|
struct zfcp_port *port = act->port;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
if (port->wwpn != adapter->peer_wwpn) {
|
|
|
|
zfcp_erp_port_failed(port, 25, NULL);
|
|
|
|
return ZFCP_ERP_FAILED;
|
|
|
|
}
|
|
|
|
port->d_id = adapter->peer_d_id;
|
|
|
|
atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status);
|
|
|
|
return zfcp_erp_port_strategy_open_port(act);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act)
|
|
|
|
{
|
|
|
|
struct zfcp_adapter *adapter = act->adapter;
|
|
|
|
struct zfcp_port *port = act->port;
|
|
|
|
struct zfcp_port *ns_port = adapter->nameserver_port;
|
|
|
|
int p_status = atomic_read(&port->status);
|
|
|
|
|
|
|
|
switch (act->step) {
|
|
|
|
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)
|
|
|
|
return zfcp_erp_open_ptp_port(act);
|
|
|
|
if (!ns_port) {
|
|
|
|
dev_err(&adapter->ccw_device->dev,
|
2008-10-01 18:42:15 +08:00
|
|
|
"Attaching the name server port to the "
|
|
|
|
"FCP device failed\n");
|
2008-07-02 16:56:40 +08:00
|
|
|
return ZFCP_ERP_FAILED;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2008-07-02 16:56:40 +08:00
|
|
|
if (!(atomic_read(&ns_port->status) &
|
|
|
|
ZFCP_STATUS_COMMON_UNBLOCKED)) {
|
|
|
|
/* nameserver port may live again */
|
|
|
|
atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING,
|
|
|
|
&ns_port->status);
|
|
|
|
if (zfcp_erp_port_reopen(ns_port, 0, 77, act) >= 0) {
|
|
|
|
act->step = ZFCP_ERP_STEP_NAMESERVER_OPEN;
|
|
|
|
return ZFCP_ERP_CONTINUES;
|
|
|
|
}
|
|
|
|
return ZFCP_ERP_FAILED;
|
|
|
|
}
|
|
|
|
/* else nameserver port is already open, fall through */
|
|
|
|
case ZFCP_ERP_STEP_NAMESERVER_OPEN:
|
|
|
|
if (!(atomic_read(&ns_port->status) & ZFCP_STATUS_COMMON_OPEN))
|
|
|
|
return ZFCP_ERP_FAILED;
|
|
|
|
return zfcp_erp_port_strategy_open_lookup(act);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
case ZFCP_ERP_STEP_NAMESERVER_LOOKUP:
|
|
|
|
if (!(p_status & ZFCP_STATUS_PORT_DID_DID)) {
|
|
|
|
if (p_status & (ZFCP_STATUS_PORT_INVALID_WWPN)) {
|
|
|
|
zfcp_erp_port_failed(port, 26, NULL);
|
|
|
|
return ZFCP_ERP_EXIT;
|
|
|
|
}
|
|
|
|
return ZFCP_ERP_FAILED;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2008-07-02 16:56:40 +08:00
|
|
|
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) &&
|
|
|
|
(p_status & ZFCP_STATUS_PORT_DID_DID))
|
|
|
|
return ZFCP_ERP_SUCCEEDED;
|
|
|
|
/* fall through otherwise */
|
|
|
|
}
|
|
|
|
return ZFCP_ERP_FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int zfcp_erp_port_strategy_open(struct zfcp_erp_action *act)
|
|
|
|
{
|
|
|
|
if (atomic_read(&act->port->status) & (ZFCP_STATUS_PORT_WKA))
|
|
|
|
return zfcp_erp_port_strategy_open_nameserver(act);
|
|
|
|
return zfcp_erp_port_strategy_open_common(act);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int zfcp_erp_port_strategy(struct zfcp_erp_action *erp_action)
|
|
|
|
{
|
|
|
|
struct zfcp_port *port = erp_action->port;
|
|
|
|
|
|
|
|
switch (erp_action->step) {
|
|
|
|
case ZFCP_ERP_STEP_UNINITIALIZED:
|
|
|
|
zfcp_erp_port_strategy_clearstati(port);
|
|
|
|
if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)
|
|
|
|
return zfcp_erp_port_strategy_close(erp_action);
|
2005-04-17 06:20:36 +08:00
|
|
|
break;
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
case ZFCP_ERP_STEP_PORT_CLOSING:
|
|
|
|
if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)
|
|
|
|
return ZFCP_ERP_FAILED;
|
2005-04-17 06:20:36 +08:00
|
|
|
break;
|
|
|
|
}
|
2008-07-02 16:56:40 +08:00
|
|
|
if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY)
|
|
|
|
return ZFCP_ERP_EXIT;
|
|
|
|
else
|
|
|
|
return zfcp_erp_port_strategy_open(erp_action);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
return ZFCP_ERP_FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void zfcp_erp_unit_strategy_clearstati(struct zfcp_unit *unit)
|
|
|
|
{
|
2008-10-01 18:42:16 +08:00
|
|
|
atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
|
2008-07-02 16:56:40 +08:00
|
|
|
ZFCP_STATUS_UNIT_SHARED |
|
|
|
|
ZFCP_STATUS_UNIT_READONLY,
|
|
|
|
&unit->status);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int zfcp_erp_unit_strategy_close(struct zfcp_erp_action *erp_action)
|
|
|
|
{
|
|
|
|
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)
|
|
|
|
return ZFCP_ERP_FAILED;
|
|
|
|
return ZFCP_ERP_CONTINUES;
|
|
|
|
}
|
|
|
|
|
|
|
|
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;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int zfcp_erp_unit_strategy(struct zfcp_erp_action *erp_action)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
struct zfcp_unit *unit = erp_action->unit;
|
|
|
|
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
return ZFCP_ERP_FAILED;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int zfcp_erp_strategy_check_unit(struct zfcp_unit *unit, int result)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
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);
|
2008-10-01 18:42:15 +08:00
|
|
|
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",
|
|
|
|
unit->fcp_lun, unit->port->wwpn);
|
2008-04-18 18:51:55 +08:00
|
|
|
zfcp_erp_unit_failed(unit, 21, NULL);
|
2008-10-01 18:42:15 +08:00
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
|
|
|
|
zfcp_erp_unit_block(unit, 0);
|
2005-04-17 06:20:36 +08:00
|
|
|
result = ZFCP_ERP_EXIT;
|
|
|
|
}
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int zfcp_erp_strategy_check_port(struct zfcp_port *port, int result)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
switch (result) {
|
|
|
|
case ZFCP_ERP_SUCCEEDED :
|
|
|
|
atomic_set(&port->erp_counter, 0);
|
|
|
|
zfcp_erp_port_unblock(port);
|
|
|
|
break;
|
2008-07-02 16:56:40 +08:00
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
case ZFCP_ERP_FAILED :
|
2008-07-02 16:56:40 +08:00
|
|
|
if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC) {
|
2008-06-11 00:21:00 +08:00
|
|
|
zfcp_erp_port_block(port, 0);
|
|
|
|
result = ZFCP_ERP_EXIT;
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
atomic_inc(&port->erp_counter);
|
2008-10-01 18:42:15 +08:00
|
|
|
if (atomic_read(&port->erp_counter) > ZFCP_MAX_ERPS) {
|
|
|
|
dev_err(&port->adapter->ccw_device->dev,
|
|
|
|
"ERP failed for remote port 0x%016Lx\n",
|
|
|
|
port->wwpn);
|
2008-04-18 18:51:55 +08:00
|
|
|
zfcp_erp_port_failed(port, 22, NULL);
|
2008-10-01 18:42:15 +08:00
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
|
|
|
|
zfcp_erp_port_block(port, 0);
|
2005-04-17 06:20:36 +08:00
|
|
|
result = ZFCP_ERP_EXIT;
|
|
|
|
}
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int zfcp_erp_strategy_check_adapter(struct zfcp_adapter *adapter,
|
|
|
|
int result)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
switch (result) {
|
|
|
|
case ZFCP_ERP_SUCCEEDED :
|
|
|
|
atomic_set(&adapter->erp_counter, 0);
|
|
|
|
zfcp_erp_adapter_unblock(adapter);
|
|
|
|
break;
|
2008-07-02 16:56:40 +08:00
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
case ZFCP_ERP_FAILED :
|
|
|
|
atomic_inc(&adapter->erp_counter);
|
2008-10-01 18:42:15 +08:00
|
|
|
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");
|
2008-04-18 18:51:55 +08:00
|
|
|
zfcp_erp_adapter_failed(adapter, 23, NULL);
|
2008-10-01 18:42:15 +08:00
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
|
|
|
|
zfcp_erp_adapter_block(adapter, 0);
|
2005-04-17 06:20:36 +08:00
|
|
|
result = ZFCP_ERP_EXIT;
|
|
|
|
}
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int zfcp_erp_strategy_check_target(struct zfcp_erp_action *erp_action,
|
|
|
|
int result)
|
2007-05-08 17:16:52 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
struct zfcp_adapter *adapter = erp_action->adapter;
|
|
|
|
struct zfcp_port *port = erp_action->port;
|
|
|
|
struct zfcp_unit *unit = erp_action->unit;
|
|
|
|
|
|
|
|
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;
|
2007-05-08 17:16:52 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int zfcp_erp_strat_change_det(atomic_t *target_status, u32 erp_status)
|
2007-05-08 17:16:52 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
int status = atomic_read(target_status);
|
2007-05-08 17:16:52 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
if ((status & ZFCP_STATUS_COMMON_RUNNING) &&
|
|
|
|
(erp_status & ZFCP_STATUS_ERP_CLOSE_ONLY))
|
|
|
|
return 1; /* take it online */
|
2007-05-08 17:16:52 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
if (!(status & ZFCP_STATUS_COMMON_RUNNING) &&
|
|
|
|
!(erp_status & ZFCP_STATUS_ERP_CLOSE_ONLY))
|
|
|
|
return 1; /* take it offline */
|
|
|
|
|
|
|
|
return 0;
|
2007-05-08 17:16:52 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int zfcp_erp_strategy_statechange(struct zfcp_erp_action *act, int ret)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
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;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
switch (action) {
|
2005-04-17 06:20:36 +08:00
|
|
|
case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
|
2008-07-02 16:56:40 +08:00
|
|
|
if (zfcp_erp_strat_change_det(&adapter->status, erp_status)) {
|
|
|
|
_zfcp_erp_adapter_reopen(adapter,
|
|
|
|
ZFCP_STATUS_COMMON_ERP_FAILED,
|
|
|
|
67, NULL);
|
|
|
|
return ZFCP_ERP_EXIT;
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
break;
|
|
|
|
|
|
|
|
case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
|
|
|
|
case ZFCP_ERP_ACTION_REOPEN_PORT:
|
2008-07-02 16:56:40 +08:00
|
|
|
if (zfcp_erp_strat_change_det(&port->status, erp_status)) {
|
|
|
|
_zfcp_erp_port_reopen(port,
|
|
|
|
ZFCP_STATUS_COMMON_ERP_FAILED,
|
|
|
|
68, NULL);
|
|
|
|
return ZFCP_ERP_EXIT;
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
break;
|
|
|
|
|
|
|
|
case ZFCP_ERP_ACTION_REOPEN_UNIT:
|
2008-07-02 16:56:40 +08:00
|
|
|
if (zfcp_erp_strat_change_det(&unit->status, erp_status)) {
|
|
|
|
_zfcp_erp_unit_reopen(unit,
|
|
|
|
ZFCP_STATUS_COMMON_ERP_FAILED,
|
|
|
|
69, NULL);
|
|
|
|
return ZFCP_ERP_EXIT;
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
break;
|
|
|
|
}
|
2008-07-02 16:56:40 +08:00
|
|
|
return ret;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static void zfcp_erp_action_dequeue(struct zfcp_erp_action *erp_action)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
struct zfcp_adapter *adapter = erp_action->adapter;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
adapter->erp_total_count--;
|
|
|
|
if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) {
|
|
|
|
adapter->erp_low_mem_count--;
|
|
|
|
erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM;
|
2008-03-27 21:22:05 +08:00
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
list_del(&erp_action->list);
|
|
|
|
zfcp_rec_dbf_event_action(144, erp_action);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
switch (erp_action->action) {
|
|
|
|
case ZFCP_ERP_ACTION_REOPEN_UNIT:
|
|
|
|
atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE,
|
|
|
|
&erp_action->unit->status);
|
|
|
|
break;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
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;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
|
|
|
|
atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE,
|
|
|
|
&erp_action->adapter->status);
|
|
|
|
break;
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
struct zfcp_erp_add_work {
|
|
|
|
struct zfcp_unit *unit;
|
|
|
|
struct work_struct work;
|
|
|
|
};
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static void zfcp_erp_scsi_scan(struct work_struct *work)
|
|
|
|
{
|
|
|
|
struct zfcp_erp_add_work *p =
|
|
|
|
container_of(work, struct zfcp_erp_add_work, work);
|
|
|
|
struct zfcp_unit *unit = p->unit;
|
|
|
|
struct fc_rport *rport = unit->port->rport;
|
|
|
|
scsi_scan_target(&rport->dev, 0, rport->scsi_target_id,
|
|
|
|
unit->scsi_lun, 0);
|
|
|
|
atomic_clear_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, &unit->status);
|
|
|
|
zfcp_unit_put(unit);
|
|
|
|
kfree(p);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static void zfcp_erp_schedule_work(struct zfcp_unit *unit)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
struct zfcp_erp_add_work *p;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
p = kzalloc(sizeof(*p), GFP_KERNEL);
|
|
|
|
if (!p) {
|
|
|
|
dev_err(&unit->port->adapter->ccw_device->dev,
|
2008-10-01 18:42:15 +08:00
|
|
|
"Registering unit 0x%016Lx on port 0x%016Lx failed\n",
|
2008-07-02 16:56:40 +08:00
|
|
|
unit->fcp_lun, unit->port->wwpn);
|
|
|
|
return;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
zfcp_unit_get(unit);
|
|
|
|
atomic_set_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, &unit->status);
|
|
|
|
INIT_WORK(&p->work, zfcp_erp_scsi_scan);
|
|
|
|
p->unit = unit;
|
|
|
|
schedule_work(&p->work);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static void zfcp_erp_rport_register(struct zfcp_port *port)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
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(port->adapter->scsi_host, 0, &ids);
|
|
|
|
if (!port->rport) {
|
|
|
|
dev_err(&port->adapter->ccw_device->dev,
|
2008-10-01 18:42:15 +08:00
|
|
|
"Registering port 0x%016Lx failed\n",
|
|
|
|
port->wwpn);
|
2008-07-02 16:56:40 +08:00
|
|
|
return;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
scsi_target_unblock(&port->rport->dev);
|
|
|
|
port->rport->maxframe_size = port->maxframe_size;
|
|
|
|
port->rport->supported_classes = port->supported_classes;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static void zfcp_erp_rports_del(struct zfcp_adapter *adapter)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
struct zfcp_port *port;
|
|
|
|
list_for_each_entry(port, &adapter->port_list_head, list)
|
2008-07-02 16:56:40 +08:00
|
|
|
if (port->rport && !(atomic_read(&port->status) &
|
|
|
|
ZFCP_STATUS_PORT_WKA)) {
|
|
|
|
fc_remote_port_delete(port->rport);
|
|
|
|
port->rport = NULL;
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
struct zfcp_adapter *adapter = act->adapter;
|
|
|
|
struct zfcp_port *port = act->port;
|
|
|
|
struct zfcp_unit *unit = act->unit;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
switch (act->action) {
|
|
|
|
case ZFCP_ERP_ACTION_REOPEN_UNIT:
|
|
|
|
if ((result == ZFCP_ERP_SUCCEEDED) &&
|
|
|
|
!unit->device && port->rport) {
|
|
|
|
atomic_set_mask(ZFCP_STATUS_UNIT_REGISTERED,
|
|
|
|
&unit->status);
|
|
|
|
if (!(atomic_read(&unit->status) &
|
|
|
|
ZFCP_STATUS_UNIT_SCSI_WORK_PENDING))
|
|
|
|
zfcp_erp_schedule_work(unit);
|
|
|
|
}
|
|
|
|
zfcp_unit_put(unit);
|
|
|
|
break;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
|
|
|
|
case ZFCP_ERP_ACTION_REOPEN_PORT:
|
|
|
|
if (atomic_read(&port->status) & ZFCP_STATUS_PORT_NO_WWPN) {
|
|
|
|
zfcp_port_put(port);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if ((result == ZFCP_ERP_SUCCEEDED) && !port->rport)
|
|
|
|
zfcp_erp_rport_register(port);
|
|
|
|
if ((result != ZFCP_ERP_SUCCEEDED) && port->rport) {
|
|
|
|
fc_remote_port_delete(port->rport);
|
|
|
|
port->rport = NULL;
|
|
|
|
}
|
|
|
|
zfcp_port_put(port);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
|
|
|
|
if (result != ZFCP_ERP_SUCCEEDED)
|
|
|
|
zfcp_erp_rports_del(adapter);
|
|
|
|
zfcp_adapter_put(adapter);
|
|
|
|
break;
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int zfcp_erp_strategy_do_action(struct zfcp_erp_action *erp_action)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
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;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int zfcp_erp_strategy(struct zfcp_erp_action *erp_action)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
int retval;
|
2008-07-02 16:56:40 +08:00
|
|
|
struct zfcp_adapter *adapter = erp_action->adapter;
|
|
|
|
unsigned long flags;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
read_lock_irqsave(&zfcp_data.config_lock, flags);
|
|
|
|
write_lock(&adapter->erp_lock);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
zfcp_erp_strategy_check_fsfreq(erp_action);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) {
|
|
|
|
zfcp_erp_action_dequeue(erp_action);
|
|
|
|
retval = ZFCP_ERP_DISMISSED;
|
|
|
|
goto unlock;
|
2005-06-13 19:15:15 +08:00
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2006-02-11 08:41:50 +08:00
|
|
|
zfcp_erp_action_to_running(erp_action);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
/* no lock to allow for blocking operations */
|
|
|
|
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);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED)
|
|
|
|
retval = ZFCP_ERP_CONTINUES;
|
2008-06-11 00:21:00 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
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;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2008-07-02 16:56:40 +08:00
|
|
|
if (adapter->erp_total_count == adapter->erp_low_mem_count)
|
|
|
|
_zfcp_erp_adapter_reopen(adapter, 0, 66, NULL);
|
|
|
|
else {
|
|
|
|
zfcp_erp_strategy_memwait(erp_action);
|
|
|
|
retval = ZFCP_ERP_CONTINUES;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2008-07-02 16:56:40 +08:00
|
|
|
goto unlock;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
case ZFCP_ERP_CONTINUES:
|
|
|
|
if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) {
|
|
|
|
--adapter->erp_low_mem_count;
|
|
|
|
erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2008-07-02 16:56:40 +08:00
|
|
|
goto unlock;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
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;
|
|
|
|
zfcp_erp_strategy_followup_actions(erp_action);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
unlock:
|
|
|
|
write_unlock(&adapter->erp_lock);
|
|
|
|
read_unlock_irqrestore(&zfcp_data.config_lock, flags);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
if (retval != ZFCP_ERP_CONTINUES)
|
|
|
|
zfcp_erp_action_cleanup(erp_action, retval);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static int zfcp_erp_thread(void *data)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
|
|
|
|
struct list_head *next;
|
|
|
|
struct zfcp_erp_action *act;
|
|
|
|
unsigned long flags;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
daemonize("zfcperp%s", adapter->ccw_device->dev.bus_id);
|
|
|
|
/* Block all signals */
|
|
|
|
siginitsetinv(¤t->blocked, 0);
|
|
|
|
atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status);
|
|
|
|
wake_up(&adapter->erp_thread_wqh);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
while (!(atomic_read(&adapter->status) &
|
|
|
|
ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL)) {
|
|
|
|
write_lock_irqsave(&adapter->erp_lock, flags);
|
|
|
|
next = adapter->erp_ready_head.next;
|
|
|
|
write_unlock_irqrestore(&adapter->erp_lock, flags);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
if (next != &adapter->erp_ready_head) {
|
|
|
|
act = list_entry(next, struct zfcp_erp_action, list);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
/* there is more to come after dismission, no notify */
|
|
|
|
if (zfcp_erp_strategy(act) != ZFCP_ERP_DISMISSED)
|
|
|
|
zfcp_erp_wakeup(adapter);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
zfcp_rec_dbf_event_thread(4, adapter);
|
|
|
|
down_interruptible(&adapter->erp_ready_sem);
|
|
|
|
zfcp_rec_dbf_event_thread(5, adapter);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status);
|
|
|
|
wake_up(&adapter->erp_thread_wqh);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
return 0;
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
/**
|
|
|
|
* 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;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status);
|
|
|
|
retval = kernel_thread(zfcp_erp_thread, adapter, SIGCHLD);
|
|
|
|
if (retval < 0) {
|
|
|
|
dev_err(&adapter->ccw_device->dev,
|
2008-10-01 18:42:15 +08:00
|
|
|
"Creating an ERP thread for the FCP device failed.\n");
|
2008-07-02 16:56:40 +08:00
|
|
|
return retval;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2008-07-02 16:56:40 +08:00
|
|
|
wait_event(adapter->erp_thread_wqh,
|
|
|
|
atomic_read(&adapter->status) &
|
|
|
|
ZFCP_STATUS_ADAPTER_ERP_THREAD_UP);
|
|
|
|
return 0;
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
/**
|
|
|
|
* 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)
|
|
|
|
{
|
|
|
|
atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, &adapter->status);
|
|
|
|
up(&adapter->erp_ready_sem);
|
|
|
|
zfcp_rec_dbf_event_thread_lock(2, adapter);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
wait_event(adapter->erp_thread_wqh,
|
|
|
|
!(atomic_read(&adapter->status) &
|
|
|
|
ZFCP_STATUS_ADAPTER_ERP_THREAD_UP));
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL,
|
|
|
|
&adapter->status);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
/**
|
|
|
|
* 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, u8 id, void *ref)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
zfcp_erp_modify_adapter_status(adapter, id, ref,
|
|
|
|
ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET);
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
/**
|
|
|
|
* 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, u8 id, void *ref)
|
|
|
|
{
|
|
|
|
zfcp_erp_modify_port_status(port, id, ref,
|
|
|
|
ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2008-07-02 16:56:40 +08:00
|
|
|
* zfcp_erp_unit_failed - Set unit status to failed.
|
|
|
|
* @unit: Failed unit.
|
|
|
|
* @id: Event id for debug trace.
|
|
|
|
* @ref: Reference for debug trace.
|
2005-04-17 06:20:36 +08:00
|
|
|
*/
|
2008-07-02 16:56:40 +08:00
|
|
|
void zfcp_erp_unit_failed(struct zfcp_unit *unit, u8 id, void *ref)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
zfcp_erp_modify_unit_status(unit, id, ref,
|
|
|
|
ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
/**
|
|
|
|
* 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));
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
/**
|
|
|
|
* 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, u8 id,
|
|
|
|
void *ref, u32 mask, int set_or_clear)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
struct zfcp_port *port;
|
2008-07-02 16:56:40 +08:00
|
|
|
u32 common_mask = mask & ZFCP_COMMON_FLAGS;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
if (set_or_clear == ZFCP_SET) {
|
|
|
|
if (status_change_set(mask, &adapter->status))
|
|
|
|
zfcp_rec_dbf_event_adapter(id, ref, adapter);
|
|
|
|
atomic_set_mask(mask, &adapter->status);
|
|
|
|
} else {
|
|
|
|
if (status_change_clear(mask, &adapter->status))
|
|
|
|
zfcp_rec_dbf_event_adapter(id, ref, adapter);
|
|
|
|
atomic_clear_mask(mask, &adapter->status);
|
|
|
|
if (mask & ZFCP_STATUS_COMMON_ERP_FAILED)
|
|
|
|
atomic_set(&adapter->erp_counter, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (common_mask)
|
2005-04-17 06:20:36 +08:00
|
|
|
list_for_each_entry(port, &adapter->port_list_head, list)
|
2008-07-02 16:56:40 +08:00
|
|
|
zfcp_erp_modify_port_status(port, id, ref, common_mask,
|
|
|
|
set_or_clear);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
/**
|
|
|
|
* 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, u8 id, void *ref,
|
|
|
|
u32 mask, int set_or_clear)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
struct zfcp_unit *unit;
|
2008-07-02 16:56:40 +08:00
|
|
|
u32 common_mask = mask & ZFCP_COMMON_FLAGS;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
if (set_or_clear == ZFCP_SET) {
|
|
|
|
if (status_change_set(mask, &port->status))
|
|
|
|
zfcp_rec_dbf_event_port(id, ref, port);
|
|
|
|
atomic_set_mask(mask, &port->status);
|
|
|
|
} else {
|
|
|
|
if (status_change_clear(mask, &port->status))
|
|
|
|
zfcp_rec_dbf_event_port(id, ref, port);
|
|
|
|
atomic_clear_mask(mask, &port->status);
|
|
|
|
if (mask & ZFCP_STATUS_COMMON_ERP_FAILED)
|
|
|
|
atomic_set(&port->erp_counter, 0);
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
if (common_mask)
|
|
|
|
list_for_each_entry(unit, &port->unit_list_head, list)
|
|
|
|
zfcp_erp_modify_unit_status(unit, id, ref, common_mask,
|
|
|
|
set_or_clear);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
/**
|
|
|
|
* 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, u8 id, void *ref,
|
|
|
|
u32 mask, int set_or_clear)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
if (set_or_clear == ZFCP_SET) {
|
|
|
|
if (status_change_set(mask, &unit->status))
|
|
|
|
zfcp_rec_dbf_event_unit(id, ref, unit);
|
|
|
|
atomic_set_mask(mask, &unit->status);
|
|
|
|
} else {
|
|
|
|
if (status_change_clear(mask, &unit->status))
|
|
|
|
zfcp_rec_dbf_event_unit(id, ref, unit);
|
|
|
|
atomic_clear_mask(mask, &unit->status);
|
|
|
|
if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) {
|
|
|
|
atomic_set(&unit->erp_counter, 0);
|
|
|
|
}
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
/**
|
|
|
|
* 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.
|
|
|
|
*/
|
2008-04-18 18:51:55 +08:00
|
|
|
void zfcp_erp_port_boxed(struct zfcp_port *port, u8 id, void *ref)
|
2005-06-13 19:23:57 +08:00
|
|
|
{
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
read_lock_irqsave(&zfcp_data.config_lock, flags);
|
2008-03-27 21:22:02 +08:00
|
|
|
zfcp_erp_modify_port_status(port, id, ref,
|
|
|
|
ZFCP_STATUS_COMMON_ACCESS_BOXED, ZFCP_SET);
|
2005-06-13 19:23:57 +08:00
|
|
|
read_unlock_irqrestore(&zfcp_data.config_lock, flags);
|
2008-03-27 21:22:03 +08:00
|
|
|
zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref);
|
2005-06-13 19:23:57 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
/**
|
|
|
|
* 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.
|
|
|
|
*/
|
2008-04-18 18:51:55 +08:00
|
|
|
void zfcp_erp_unit_boxed(struct zfcp_unit *unit, u8 id, void *ref)
|
2005-06-13 19:23:57 +08:00
|
|
|
{
|
2008-03-27 21:22:02 +08:00
|
|
|
zfcp_erp_modify_unit_status(unit, id, ref,
|
|
|
|
ZFCP_STATUS_COMMON_ACCESS_BOXED, ZFCP_SET);
|
2008-03-27 21:22:03 +08:00
|
|
|
zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref);
|
2005-06-13 19:23:57 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
/**
|
|
|
|
* 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.
|
|
|
|
*/
|
2008-04-18 18:51:55 +08:00
|
|
|
void zfcp_erp_port_access_denied(struct zfcp_port *port, u8 id, void *ref)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
read_lock_irqsave(&zfcp_data.config_lock, flags);
|
2008-03-27 21:22:02 +08:00
|
|
|
zfcp_erp_modify_port_status(port, id, ref,
|
|
|
|
ZFCP_STATUS_COMMON_ERP_FAILED |
|
|
|
|
ZFCP_STATUS_COMMON_ACCESS_DENIED, ZFCP_SET);
|
2005-04-17 06:20:36 +08:00
|
|
|
read_unlock_irqrestore(&zfcp_data.config_lock, flags);
|
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
/**
|
|
|
|
* 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.
|
|
|
|
*/
|
2008-04-18 18:51:55 +08:00
|
|
|
void zfcp_erp_unit_access_denied(struct zfcp_unit *unit, u8 id, void *ref)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-03-27 21:22:02 +08:00
|
|
|
zfcp_erp_modify_unit_status(unit, id, ref,
|
|
|
|
ZFCP_STATUS_COMMON_ERP_FAILED |
|
|
|
|
ZFCP_STATUS_COMMON_ACCESS_DENIED, ZFCP_SET);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static void zfcp_erp_unit_access_changed(struct zfcp_unit *unit, u8 id,
|
|
|
|
void *ref)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
int status = atomic_read(&unit->status);
|
|
|
|
if (!(status & (ZFCP_STATUS_COMMON_ACCESS_DENIED |
|
|
|
|
ZFCP_STATUS_COMMON_ACCESS_BOXED)))
|
2005-09-14 03:51:16 +08:00
|
|
|
return;
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
static void zfcp_erp_port_access_changed(struct zfcp_port *port, u8 id,
|
|
|
|
void *ref)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
struct zfcp_unit *unit;
|
2008-07-02 16:56:40 +08:00
|
|
|
int status = atomic_read(&port->status);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
if (!(status & (ZFCP_STATUS_COMMON_ACCESS_DENIED |
|
|
|
|
ZFCP_STATUS_COMMON_ACCESS_BOXED))) {
|
|
|
|
if (!(status & ZFCP_STATUS_PORT_WKA))
|
2005-04-17 06:20:36 +08:00
|
|
|
list_for_each_entry(unit, &port->unit_list_head, list)
|
2008-03-27 21:22:03 +08:00
|
|
|
zfcp_erp_unit_access_changed(unit, id, ref);
|
2005-04-17 06:20:36 +08:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2008-06-11 00:20:58 +08:00
|
|
|
zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
/**
|
|
|
|
* 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, u8 id,
|
|
|
|
void *ref)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-07-02 16:56:40 +08:00
|
|
|
struct zfcp_port *port;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
|
2005-04-17 06:20:36 +08:00
|
|
|
return;
|
|
|
|
|
2008-07-02 16:56:40 +08:00
|
|
|
read_lock_irqsave(&zfcp_data.config_lock, flags);
|
|
|
|
if (adapter->nameserver_port)
|
|
|
|
zfcp_erp_port_access_changed(adapter->nameserver_port, id, ref);
|
|
|
|
list_for_each_entry(port, &adapter->port_list_head, list)
|
|
|
|
if (port != adapter->nameserver_port)
|
|
|
|
zfcp_erp_port_access_changed(port, id, ref);
|
|
|
|
read_unlock_irqrestore(&zfcp_data.config_lock, flags);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|