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1b3c3714cb
heirarchical, hierachical -> hierarchical heirarchy, hierachy -> hierarchy Signed-off-by: Uwe Kleine-König <zeisberg@informatik.uni-freiburg.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
2418 lines
73 KiB
C
2418 lines
73 KiB
C
/*
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* FiberChannel transport specific attributes exported to sysfs.
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*
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* Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* ========
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*
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* Copyright (C) 2004-2005 James Smart, Emulex Corporation
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* Rewrite for host, target, device, and remote port attributes,
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* statistics, and service functions...
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*
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_transport.h>
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#include <scsi/scsi_transport_fc.h>
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#include <scsi/scsi_cmnd.h>
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#include <linux/netlink.h>
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#include <net/netlink.h>
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#include <scsi/scsi_netlink_fc.h>
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#include "scsi_priv.h"
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static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
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/*
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* Redefine so that we can have same named attributes in the
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* sdev/starget/host objects.
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*/
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#define FC_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
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struct class_device_attribute class_device_attr_##_prefix##_##_name = \
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__ATTR(_name,_mode,_show,_store)
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#define fc_enum_name_search(title, table_type, table) \
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static const char *get_fc_##title##_name(enum table_type table_key) \
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{ \
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int i; \
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char *name = NULL; \
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\
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for (i = 0; i < ARRAY_SIZE(table); i++) { \
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if (table[i].value == table_key) { \
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name = table[i].name; \
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break; \
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} \
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} \
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return name; \
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}
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#define fc_enum_name_match(title, table_type, table) \
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static int get_fc_##title##_match(const char *table_key, \
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enum table_type *value) \
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{ \
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int i; \
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\
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for (i = 0; i < ARRAY_SIZE(table); i++) { \
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if (strncmp(table_key, table[i].name, \
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table[i].matchlen) == 0) { \
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*value = table[i].value; \
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return 0; /* success */ \
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} \
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} \
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return 1; /* failure */ \
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}
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/* Convert fc_port_type values to ascii string name */
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static struct {
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enum fc_port_type value;
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char *name;
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} fc_port_type_names[] = {
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{ FC_PORTTYPE_UNKNOWN, "Unknown" },
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{ FC_PORTTYPE_OTHER, "Other" },
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{ FC_PORTTYPE_NOTPRESENT, "Not Present" },
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{ FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" },
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{ FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
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{ FC_PORTTYPE_LPORT, "LPort (private loop)" },
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{ FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection" },
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};
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fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
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#define FC_PORTTYPE_MAX_NAMELEN 50
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/* Convert fc_host_event_code values to ascii string name */
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static const struct {
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enum fc_host_event_code value;
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char *name;
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} fc_host_event_code_names[] = {
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{ FCH_EVT_LIP, "lip" },
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{ FCH_EVT_LINKUP, "link_up" },
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{ FCH_EVT_LINKDOWN, "link_down" },
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{ FCH_EVT_LIPRESET, "lip_reset" },
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{ FCH_EVT_RSCN, "rscn" },
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{ FCH_EVT_ADAPTER_CHANGE, "adapter_chg" },
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{ FCH_EVT_PORT_UNKNOWN, "port_unknown" },
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{ FCH_EVT_PORT_ONLINE, "port_online" },
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{ FCH_EVT_PORT_OFFLINE, "port_offline" },
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{ FCH_EVT_PORT_FABRIC, "port_fabric" },
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{ FCH_EVT_LINK_UNKNOWN, "link_unknown" },
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{ FCH_EVT_VENDOR_UNIQUE, "vendor_unique" },
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};
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fc_enum_name_search(host_event_code, fc_host_event_code,
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fc_host_event_code_names)
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#define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
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/* Convert fc_port_state values to ascii string name */
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static struct {
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enum fc_port_state value;
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char *name;
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} fc_port_state_names[] = {
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{ FC_PORTSTATE_UNKNOWN, "Unknown" },
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{ FC_PORTSTATE_NOTPRESENT, "Not Present" },
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{ FC_PORTSTATE_ONLINE, "Online" },
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{ FC_PORTSTATE_OFFLINE, "Offline" },
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{ FC_PORTSTATE_BLOCKED, "Blocked" },
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{ FC_PORTSTATE_BYPASSED, "Bypassed" },
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{ FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" },
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{ FC_PORTSTATE_LINKDOWN, "Linkdown" },
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{ FC_PORTSTATE_ERROR, "Error" },
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{ FC_PORTSTATE_LOOPBACK, "Loopback" },
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{ FC_PORTSTATE_DELETED, "Deleted" },
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};
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fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
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#define FC_PORTSTATE_MAX_NAMELEN 20
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/* Convert fc_tgtid_binding_type values to ascii string name */
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static const struct {
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enum fc_tgtid_binding_type value;
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char *name;
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int matchlen;
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} fc_tgtid_binding_type_names[] = {
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{ FC_TGTID_BIND_NONE, "none", 4 },
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{ FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
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{ FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
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{ FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
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};
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fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
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fc_tgtid_binding_type_names)
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fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
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fc_tgtid_binding_type_names)
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#define FC_BINDTYPE_MAX_NAMELEN 30
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#define fc_bitfield_name_search(title, table) \
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static ssize_t \
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get_fc_##title##_names(u32 table_key, char *buf) \
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{ \
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char *prefix = ""; \
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ssize_t len = 0; \
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int i; \
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\
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for (i = 0; i < ARRAY_SIZE(table); i++) { \
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if (table[i].value & table_key) { \
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len += sprintf(buf + len, "%s%s", \
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prefix, table[i].name); \
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prefix = ", "; \
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} \
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} \
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len += sprintf(buf + len, "\n"); \
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return len; \
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}
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/* Convert FC_COS bit values to ascii string name */
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static const struct {
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u32 value;
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char *name;
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} fc_cos_names[] = {
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{ FC_COS_CLASS1, "Class 1" },
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{ FC_COS_CLASS2, "Class 2" },
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{ FC_COS_CLASS3, "Class 3" },
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{ FC_COS_CLASS4, "Class 4" },
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{ FC_COS_CLASS6, "Class 6" },
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};
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fc_bitfield_name_search(cos, fc_cos_names)
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/* Convert FC_PORTSPEED bit values to ascii string name */
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static const struct {
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u32 value;
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char *name;
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} fc_port_speed_names[] = {
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{ FC_PORTSPEED_1GBIT, "1 Gbit" },
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{ FC_PORTSPEED_2GBIT, "2 Gbit" },
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{ FC_PORTSPEED_4GBIT, "4 Gbit" },
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{ FC_PORTSPEED_10GBIT, "10 Gbit" },
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{ FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" },
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};
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fc_bitfield_name_search(port_speed, fc_port_speed_names)
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static int
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show_fc_fc4s (char *buf, u8 *fc4_list)
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{
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int i, len=0;
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for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
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len += sprintf(buf + len , "0x%02x ", *fc4_list);
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len += sprintf(buf + len, "\n");
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return len;
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}
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/* Convert FC_RPORT_ROLE bit values to ascii string name */
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static const struct {
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u32 value;
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char *name;
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} fc_remote_port_role_names[] = {
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{ FC_RPORT_ROLE_FCP_TARGET, "FCP Target" },
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{ FC_RPORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
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{ FC_RPORT_ROLE_IP_PORT, "IP Port" },
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};
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fc_bitfield_name_search(remote_port_roles, fc_remote_port_role_names)
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/*
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* Define roles that are specific to port_id. Values are relative to ROLE_MASK.
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*/
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#define FC_WELLKNOWN_PORTID_MASK 0xfffff0
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#define FC_WELLKNOWN_ROLE_MASK 0x00000f
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#define FC_FPORT_PORTID 0x00000e
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#define FC_FABCTLR_PORTID 0x00000d
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#define FC_DIRSRVR_PORTID 0x00000c
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#define FC_TIMESRVR_PORTID 0x00000b
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#define FC_MGMTSRVR_PORTID 0x00000a
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static void fc_timeout_deleted_rport(struct work_struct *work);
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static void fc_timeout_fail_rport_io(struct work_struct *work);
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static void fc_scsi_scan_rport(struct work_struct *work);
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/*
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* Attribute counts pre object type...
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* Increase these values if you add attributes
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*/
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#define FC_STARGET_NUM_ATTRS 3
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#define FC_RPORT_NUM_ATTRS 10
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#define FC_HOST_NUM_ATTRS 17
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struct fc_internal {
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struct scsi_transport_template t;
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struct fc_function_template *f;
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/*
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* For attributes : each object has :
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* An array of the actual attributes structures
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* An array of null-terminated pointers to the attribute
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* structures - used for mid-layer interaction.
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*
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* The attribute containers for the starget and host are are
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* part of the midlayer. As the remote port is specific to the
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* fc transport, we must provide the attribute container.
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*/
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struct class_device_attribute private_starget_attrs[
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FC_STARGET_NUM_ATTRS];
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struct class_device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
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struct class_device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
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struct class_device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
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struct transport_container rport_attr_cont;
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struct class_device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
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struct class_device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
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};
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#define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
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static int fc_target_setup(struct transport_container *tc, struct device *dev,
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struct class_device *cdev)
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{
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struct scsi_target *starget = to_scsi_target(dev);
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struct fc_rport *rport = starget_to_rport(starget);
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/*
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* if parent is remote port, use values from remote port.
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* Otherwise, this host uses the fc_transport, but not the
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* remote port interface. As such, initialize to known non-values.
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*/
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if (rport) {
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fc_starget_node_name(starget) = rport->node_name;
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fc_starget_port_name(starget) = rport->port_name;
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fc_starget_port_id(starget) = rport->port_id;
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} else {
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fc_starget_node_name(starget) = -1;
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fc_starget_port_name(starget) = -1;
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fc_starget_port_id(starget) = -1;
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}
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return 0;
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}
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static DECLARE_TRANSPORT_CLASS(fc_transport_class,
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"fc_transport",
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fc_target_setup,
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NULL,
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NULL);
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static int fc_host_setup(struct transport_container *tc, struct device *dev,
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struct class_device *cdev)
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{
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struct Scsi_Host *shost = dev_to_shost(dev);
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struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
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/*
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* Set default values easily detected by the midlayer as
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* failure cases. The scsi lldd is responsible for initializing
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* all transport attributes to valid values per host.
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*/
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fc_host->node_name = -1;
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fc_host->port_name = -1;
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fc_host->permanent_port_name = -1;
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fc_host->supported_classes = FC_COS_UNSPECIFIED;
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memset(fc_host->supported_fc4s, 0,
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sizeof(fc_host->supported_fc4s));
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fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
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fc_host->maxframe_size = -1;
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memset(fc_host->serial_number, 0,
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sizeof(fc_host->serial_number));
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fc_host->port_id = -1;
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fc_host->port_type = FC_PORTTYPE_UNKNOWN;
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fc_host->port_state = FC_PORTSTATE_UNKNOWN;
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memset(fc_host->active_fc4s, 0,
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sizeof(fc_host->active_fc4s));
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fc_host->speed = FC_PORTSPEED_UNKNOWN;
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fc_host->fabric_name = -1;
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memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
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memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
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fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
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INIT_LIST_HEAD(&fc_host->rports);
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INIT_LIST_HEAD(&fc_host->rport_bindings);
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fc_host->next_rport_number = 0;
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fc_host->next_target_id = 0;
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snprintf(fc_host->work_q_name, KOBJ_NAME_LEN, "fc_wq_%d",
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shost->host_no);
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fc_host->work_q = create_singlethread_workqueue(
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fc_host->work_q_name);
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if (!fc_host->work_q)
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return -ENOMEM;
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snprintf(fc_host->devloss_work_q_name, KOBJ_NAME_LEN, "fc_dl_%d",
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shost->host_no);
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fc_host->devloss_work_q = create_singlethread_workqueue(
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fc_host->devloss_work_q_name);
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if (!fc_host->devloss_work_q) {
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destroy_workqueue(fc_host->work_q);
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fc_host->work_q = NULL;
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return -ENOMEM;
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}
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return 0;
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}
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|
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static DECLARE_TRANSPORT_CLASS(fc_host_class,
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"fc_host",
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fc_host_setup,
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NULL,
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NULL);
|
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|
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/*
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* Setup and Remove actions for remote ports are handled
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* in the service functions below.
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*/
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static DECLARE_TRANSPORT_CLASS(fc_rport_class,
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"fc_remote_ports",
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NULL,
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NULL,
|
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NULL);
|
|
|
|
/*
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* Module Parameters
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*/
|
|
|
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/*
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* dev_loss_tmo: the default number of seconds that the FC transport
|
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* should insulate the loss of a remote port.
|
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* The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
|
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*/
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static unsigned int fc_dev_loss_tmo = 60; /* seconds */
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|
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module_param_named(dev_loss_tmo, fc_dev_loss_tmo, int, S_IRUGO|S_IWUSR);
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MODULE_PARM_DESC(dev_loss_tmo,
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"Maximum number of seconds that the FC transport should"
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" insulate the loss of a remote port. Once this value is"
|
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" exceeded, the scsi target is removed. Value should be"
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" between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT.");
|
|
|
|
/**
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* Netlink Infrastructure
|
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**/
|
|
|
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static atomic_t fc_event_seq;
|
|
|
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/**
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* fc_get_event_number - Obtain the next sequential FC event number
|
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*
|
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* Notes:
|
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* We could have inline'd this, but it would have required fc_event_seq to
|
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* be exposed. For now, live with the subroutine call.
|
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* Atomic used to avoid lock/unlock...
|
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**/
|
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u32
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fc_get_event_number(void)
|
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{
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return atomic_add_return(1, &fc_event_seq);
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}
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EXPORT_SYMBOL(fc_get_event_number);
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|
|
|
|
/**
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|
* fc_host_post_event - called to post an even on an fc_host.
|
|
*
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* @shost: host the event occurred on
|
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* @event_number: fc event number obtained from get_fc_event_number()
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* @event_code: fc_host event being posted
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* @event_data: 32bits of data for the event being posted
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*
|
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* Notes:
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* This routine assumes no locks are held on entry.
|
|
**/
|
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void
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fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
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enum fc_host_event_code event_code, u32 event_data)
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{
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struct sk_buff *skb;
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struct nlmsghdr *nlh;
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struct fc_nl_event *event;
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const char *name;
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u32 len, skblen;
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int err;
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|
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if (!scsi_nl_sock) {
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err = -ENOENT;
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goto send_fail;
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}
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|
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len = FC_NL_MSGALIGN(sizeof(*event));
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skblen = NLMSG_SPACE(len);
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|
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skb = alloc_skb(skblen, GFP_KERNEL);
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if (!skb) {
|
|
err = -ENOBUFS;
|
|
goto send_fail;
|
|
}
|
|
|
|
nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
|
|
skblen - sizeof(*nlh), 0);
|
|
if (!nlh) {
|
|
err = -ENOBUFS;
|
|
goto send_fail_skb;
|
|
}
|
|
event = NLMSG_DATA(nlh);
|
|
|
|
INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
|
|
FC_NL_ASYNC_EVENT, len);
|
|
event->seconds = get_seconds();
|
|
event->vendor_id = 0;
|
|
event->host_no = shost->host_no;
|
|
event->event_datalen = sizeof(u32); /* bytes */
|
|
event->event_num = event_number;
|
|
event->event_code = event_code;
|
|
event->event_data = event_data;
|
|
|
|
err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
|
|
GFP_KERNEL);
|
|
if (err && (err != -ESRCH)) /* filter no recipient errors */
|
|
/* nlmsg_multicast already kfree_skb'd */
|
|
goto send_fail;
|
|
|
|
return;
|
|
|
|
send_fail_skb:
|
|
kfree_skb(skb);
|
|
send_fail:
|
|
name = get_fc_host_event_code_name(event_code);
|
|
printk(KERN_WARNING
|
|
"%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
|
|
__FUNCTION__, shost->host_no,
|
|
(name) ? name : "<unknown>", event_data, err);
|
|
return;
|
|
}
|
|
EXPORT_SYMBOL(fc_host_post_event);
|
|
|
|
|
|
/**
|
|
* fc_host_post_vendor_event - called to post a vendor unique event on
|
|
* a fc_host
|
|
*
|
|
* @shost: host the event occurred on
|
|
* @event_number: fc event number obtained from get_fc_event_number()
|
|
* @data_len: amount, in bytes, of vendor unique data
|
|
* @data_buf: pointer to vendor unique data
|
|
*
|
|
* Notes:
|
|
* This routine assumes no locks are held on entry.
|
|
**/
|
|
void
|
|
fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
|
|
u32 data_len, char * data_buf, u64 vendor_id)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct nlmsghdr *nlh;
|
|
struct fc_nl_event *event;
|
|
u32 len, skblen;
|
|
int err;
|
|
|
|
if (!scsi_nl_sock) {
|
|
err = -ENOENT;
|
|
goto send_vendor_fail;
|
|
}
|
|
|
|
len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
|
|
skblen = NLMSG_SPACE(len);
|
|
|
|
skb = alloc_skb(skblen, GFP_KERNEL);
|
|
if (!skb) {
|
|
err = -ENOBUFS;
|
|
goto send_vendor_fail;
|
|
}
|
|
|
|
nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
|
|
skblen - sizeof(*nlh), 0);
|
|
if (!nlh) {
|
|
err = -ENOBUFS;
|
|
goto send_vendor_fail_skb;
|
|
}
|
|
event = NLMSG_DATA(nlh);
|
|
|
|
INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
|
|
FC_NL_ASYNC_EVENT, len);
|
|
event->seconds = get_seconds();
|
|
event->vendor_id = vendor_id;
|
|
event->host_no = shost->host_no;
|
|
event->event_datalen = data_len; /* bytes */
|
|
event->event_num = event_number;
|
|
event->event_code = FCH_EVT_VENDOR_UNIQUE;
|
|
memcpy(&event->event_data, data_buf, data_len);
|
|
|
|
err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
|
|
GFP_KERNEL);
|
|
if (err && (err != -ESRCH)) /* filter no recipient errors */
|
|
/* nlmsg_multicast already kfree_skb'd */
|
|
goto send_vendor_fail;
|
|
|
|
return;
|
|
|
|
send_vendor_fail_skb:
|
|
kfree_skb(skb);
|
|
send_vendor_fail:
|
|
printk(KERN_WARNING
|
|
"%s: Dropped Event : host %d vendor_unique - err %d\n",
|
|
__FUNCTION__, shost->host_no, err);
|
|
return;
|
|
}
|
|
EXPORT_SYMBOL(fc_host_post_vendor_event);
|
|
|
|
|
|
|
|
static __init int fc_transport_init(void)
|
|
{
|
|
int error;
|
|
|
|
atomic_set(&fc_event_seq, 0);
|
|
|
|
error = transport_class_register(&fc_host_class);
|
|
if (error)
|
|
return error;
|
|
error = transport_class_register(&fc_rport_class);
|
|
if (error)
|
|
return error;
|
|
return transport_class_register(&fc_transport_class);
|
|
}
|
|
|
|
static void __exit fc_transport_exit(void)
|
|
{
|
|
transport_class_unregister(&fc_transport_class);
|
|
transport_class_unregister(&fc_rport_class);
|
|
transport_class_unregister(&fc_host_class);
|
|
}
|
|
|
|
/*
|
|
* FC Remote Port Attribute Management
|
|
*/
|
|
|
|
#define fc_rport_show_function(field, format_string, sz, cast) \
|
|
static ssize_t \
|
|
show_fc_rport_##field (struct class_device *cdev, char *buf) \
|
|
{ \
|
|
struct fc_rport *rport = transport_class_to_rport(cdev); \
|
|
struct Scsi_Host *shost = rport_to_shost(rport); \
|
|
struct fc_internal *i = to_fc_internal(shost->transportt); \
|
|
if ((i->f->get_rport_##field) && \
|
|
!((rport->port_state == FC_PORTSTATE_BLOCKED) || \
|
|
(rport->port_state == FC_PORTSTATE_DELETED) || \
|
|
(rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
|
|
i->f->get_rport_##field(rport); \
|
|
return snprintf(buf, sz, format_string, cast rport->field); \
|
|
}
|
|
|
|
#define fc_rport_store_function(field) \
|
|
static ssize_t \
|
|
store_fc_rport_##field(struct class_device *cdev, const char *buf, \
|
|
size_t count) \
|
|
{ \
|
|
int val; \
|
|
struct fc_rport *rport = transport_class_to_rport(cdev); \
|
|
struct Scsi_Host *shost = rport_to_shost(rport); \
|
|
struct fc_internal *i = to_fc_internal(shost->transportt); \
|
|
char *cp; \
|
|
if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
|
|
(rport->port_state == FC_PORTSTATE_DELETED) || \
|
|
(rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
|
|
return -EBUSY; \
|
|
val = simple_strtoul(buf, &cp, 0); \
|
|
if (*cp && (*cp != '\n')) \
|
|
return -EINVAL; \
|
|
i->f->set_rport_##field(rport, val); \
|
|
return count; \
|
|
}
|
|
|
|
#define fc_rport_rd_attr(field, format_string, sz) \
|
|
fc_rport_show_function(field, format_string, sz, ) \
|
|
static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
|
|
show_fc_rport_##field, NULL)
|
|
|
|
#define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
|
|
fc_rport_show_function(field, format_string, sz, (cast)) \
|
|
static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
|
|
show_fc_rport_##field, NULL)
|
|
|
|
#define fc_rport_rw_attr(field, format_string, sz) \
|
|
fc_rport_show_function(field, format_string, sz, ) \
|
|
fc_rport_store_function(field) \
|
|
static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
|
|
show_fc_rport_##field, \
|
|
store_fc_rport_##field)
|
|
|
|
|
|
#define fc_private_rport_show_function(field, format_string, sz, cast) \
|
|
static ssize_t \
|
|
show_fc_rport_##field (struct class_device *cdev, char *buf) \
|
|
{ \
|
|
struct fc_rport *rport = transport_class_to_rport(cdev); \
|
|
return snprintf(buf, sz, format_string, cast rport->field); \
|
|
}
|
|
|
|
#define fc_private_rport_rd_attr(field, format_string, sz) \
|
|
fc_private_rport_show_function(field, format_string, sz, ) \
|
|
static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
|
|
show_fc_rport_##field, NULL)
|
|
|
|
#define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
|
|
fc_private_rport_show_function(field, format_string, sz, (cast)) \
|
|
static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
|
|
show_fc_rport_##field, NULL)
|
|
|
|
|
|
#define fc_private_rport_rd_enum_attr(title, maxlen) \
|
|
static ssize_t \
|
|
show_fc_rport_##title (struct class_device *cdev, char *buf) \
|
|
{ \
|
|
struct fc_rport *rport = transport_class_to_rport(cdev); \
|
|
const char *name; \
|
|
name = get_fc_##title##_name(rport->title); \
|
|
if (!name) \
|
|
return -EINVAL; \
|
|
return snprintf(buf, maxlen, "%s\n", name); \
|
|
} \
|
|
static FC_CLASS_DEVICE_ATTR(rport, title, S_IRUGO, \
|
|
show_fc_rport_##title, NULL)
|
|
|
|
|
|
#define SETUP_RPORT_ATTRIBUTE_RD(field) \
|
|
i->private_rport_attrs[count] = class_device_attr_rport_##field; \
|
|
i->private_rport_attrs[count].attr.mode = S_IRUGO; \
|
|
i->private_rport_attrs[count].store = NULL; \
|
|
i->rport_attrs[count] = &i->private_rport_attrs[count]; \
|
|
if (i->f->show_rport_##field) \
|
|
count++
|
|
|
|
#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
|
|
i->private_rport_attrs[count] = class_device_attr_rport_##field; \
|
|
i->private_rport_attrs[count].attr.mode = S_IRUGO; \
|
|
i->private_rport_attrs[count].store = NULL; \
|
|
i->rport_attrs[count] = &i->private_rport_attrs[count]; \
|
|
count++
|
|
|
|
#define SETUP_RPORT_ATTRIBUTE_RW(field) \
|
|
i->private_rport_attrs[count] = class_device_attr_rport_##field; \
|
|
if (!i->f->set_rport_##field) { \
|
|
i->private_rport_attrs[count].attr.mode = S_IRUGO; \
|
|
i->private_rport_attrs[count].store = NULL; \
|
|
} \
|
|
i->rport_attrs[count] = &i->private_rport_attrs[count]; \
|
|
if (i->f->show_rport_##field) \
|
|
count++
|
|
|
|
#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
|
|
{ \
|
|
i->private_rport_attrs[count] = class_device_attr_rport_##field; \
|
|
i->rport_attrs[count] = &i->private_rport_attrs[count]; \
|
|
count++; \
|
|
}
|
|
|
|
|
|
/* The FC Transport Remote Port Attributes: */
|
|
|
|
/* Fixed Remote Port Attributes */
|
|
|
|
fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
|
|
|
|
static ssize_t
|
|
show_fc_rport_supported_classes (struct class_device *cdev, char *buf)
|
|
{
|
|
struct fc_rport *rport = transport_class_to_rport(cdev);
|
|
if (rport->supported_classes == FC_COS_UNSPECIFIED)
|
|
return snprintf(buf, 20, "unspecified\n");
|
|
return get_fc_cos_names(rport->supported_classes, buf);
|
|
}
|
|
static FC_CLASS_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
|
|
show_fc_rport_supported_classes, NULL);
|
|
|
|
/* Dynamic Remote Port Attributes */
|
|
|
|
/*
|
|
* dev_loss_tmo attribute
|
|
*/
|
|
fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
|
|
static ssize_t
|
|
store_fc_rport_dev_loss_tmo(struct class_device *cdev, const char *buf,
|
|
size_t count)
|
|
{
|
|
int val;
|
|
struct fc_rport *rport = transport_class_to_rport(cdev);
|
|
struct Scsi_Host *shost = rport_to_shost(rport);
|
|
struct fc_internal *i = to_fc_internal(shost->transportt);
|
|
char *cp;
|
|
if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
|
|
(rport->port_state == FC_PORTSTATE_DELETED) ||
|
|
(rport->port_state == FC_PORTSTATE_NOTPRESENT))
|
|
return -EBUSY;
|
|
val = simple_strtoul(buf, &cp, 0);
|
|
if ((*cp && (*cp != '\n')) ||
|
|
(val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
|
|
return -EINVAL;
|
|
i->f->set_rport_dev_loss_tmo(rport, val);
|
|
return count;
|
|
}
|
|
static FC_CLASS_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
|
|
show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
|
|
|
|
|
|
/* Private Remote Port Attributes */
|
|
|
|
fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
|
|
fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
|
|
fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
|
|
|
|
static ssize_t
|
|
show_fc_rport_roles (struct class_device *cdev, char *buf)
|
|
{
|
|
struct fc_rport *rport = transport_class_to_rport(cdev);
|
|
|
|
/* identify any roles that are port_id specific */
|
|
if ((rport->port_id != -1) &&
|
|
(rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
|
|
FC_WELLKNOWN_PORTID_MASK) {
|
|
switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
|
|
case FC_FPORT_PORTID:
|
|
return snprintf(buf, 30, "Fabric Port\n");
|
|
case FC_FABCTLR_PORTID:
|
|
return snprintf(buf, 30, "Fabric Controller\n");
|
|
case FC_DIRSRVR_PORTID:
|
|
return snprintf(buf, 30, "Directory Server\n");
|
|
case FC_TIMESRVR_PORTID:
|
|
return snprintf(buf, 30, "Time Server\n");
|
|
case FC_MGMTSRVR_PORTID:
|
|
return snprintf(buf, 30, "Management Server\n");
|
|
default:
|
|
return snprintf(buf, 30, "Unknown Fabric Entity\n");
|
|
}
|
|
} else {
|
|
if (rport->roles == FC_RPORT_ROLE_UNKNOWN)
|
|
return snprintf(buf, 20, "unknown\n");
|
|
return get_fc_remote_port_roles_names(rport->roles, buf);
|
|
}
|
|
}
|
|
static FC_CLASS_DEVICE_ATTR(rport, roles, S_IRUGO,
|
|
show_fc_rport_roles, NULL);
|
|
|
|
fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
|
|
fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
|
|
|
|
/*
|
|
* fast_io_fail_tmo attribute
|
|
*/
|
|
static ssize_t
|
|
show_fc_rport_fast_io_fail_tmo (struct class_device *cdev, char *buf)
|
|
{
|
|
struct fc_rport *rport = transport_class_to_rport(cdev);
|
|
|
|
if (rport->fast_io_fail_tmo == -1)
|
|
return snprintf(buf, 5, "off\n");
|
|
return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
|
|
}
|
|
|
|
static ssize_t
|
|
store_fc_rport_fast_io_fail_tmo(struct class_device *cdev, const char *buf,
|
|
size_t count)
|
|
{
|
|
int val;
|
|
char *cp;
|
|
struct fc_rport *rport = transport_class_to_rport(cdev);
|
|
|
|
if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
|
|
(rport->port_state == FC_PORTSTATE_DELETED) ||
|
|
(rport->port_state == FC_PORTSTATE_NOTPRESENT))
|
|
return -EBUSY;
|
|
if (strncmp(buf, "off", 3) == 0)
|
|
rport->fast_io_fail_tmo = -1;
|
|
else {
|
|
val = simple_strtoul(buf, &cp, 0);
|
|
if ((*cp && (*cp != '\n')) ||
|
|
(val < 0) || (val >= rport->dev_loss_tmo))
|
|
return -EINVAL;
|
|
rport->fast_io_fail_tmo = val;
|
|
}
|
|
return count;
|
|
}
|
|
static FC_CLASS_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
|
|
show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
|
|
|
|
|
|
/*
|
|
* FC SCSI Target Attribute Management
|
|
*/
|
|
|
|
/*
|
|
* Note: in the target show function we recognize when the remote
|
|
* port is in the hierarchy and do not allow the driver to get
|
|
* involved in sysfs functions. The driver only gets involved if
|
|
* it's the "old" style that doesn't use rports.
|
|
*/
|
|
#define fc_starget_show_function(field, format_string, sz, cast) \
|
|
static ssize_t \
|
|
show_fc_starget_##field (struct class_device *cdev, char *buf) \
|
|
{ \
|
|
struct scsi_target *starget = transport_class_to_starget(cdev); \
|
|
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
|
|
struct fc_internal *i = to_fc_internal(shost->transportt); \
|
|
struct fc_rport *rport = starget_to_rport(starget); \
|
|
if (rport) \
|
|
fc_starget_##field(starget) = rport->field; \
|
|
else if (i->f->get_starget_##field) \
|
|
i->f->get_starget_##field(starget); \
|
|
return snprintf(buf, sz, format_string, \
|
|
cast fc_starget_##field(starget)); \
|
|
}
|
|
|
|
#define fc_starget_rd_attr(field, format_string, sz) \
|
|
fc_starget_show_function(field, format_string, sz, ) \
|
|
static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \
|
|
show_fc_starget_##field, NULL)
|
|
|
|
#define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
|
|
fc_starget_show_function(field, format_string, sz, (cast)) \
|
|
static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \
|
|
show_fc_starget_##field, NULL)
|
|
|
|
#define SETUP_STARGET_ATTRIBUTE_RD(field) \
|
|
i->private_starget_attrs[count] = class_device_attr_starget_##field; \
|
|
i->private_starget_attrs[count].attr.mode = S_IRUGO; \
|
|
i->private_starget_attrs[count].store = NULL; \
|
|
i->starget_attrs[count] = &i->private_starget_attrs[count]; \
|
|
if (i->f->show_starget_##field) \
|
|
count++
|
|
|
|
#define SETUP_STARGET_ATTRIBUTE_RW(field) \
|
|
i->private_starget_attrs[count] = class_device_attr_starget_##field; \
|
|
if (!i->f->set_starget_##field) { \
|
|
i->private_starget_attrs[count].attr.mode = S_IRUGO; \
|
|
i->private_starget_attrs[count].store = NULL; \
|
|
} \
|
|
i->starget_attrs[count] = &i->private_starget_attrs[count]; \
|
|
if (i->f->show_starget_##field) \
|
|
count++
|
|
|
|
/* The FC Transport SCSI Target Attributes: */
|
|
fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
|
|
fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
|
|
fc_starget_rd_attr(port_id, "0x%06x\n", 20);
|
|
|
|
|
|
/*
|
|
* Host Attribute Management
|
|
*/
|
|
|
|
#define fc_host_show_function(field, format_string, sz, cast) \
|
|
static ssize_t \
|
|
show_fc_host_##field (struct class_device *cdev, char *buf) \
|
|
{ \
|
|
struct Scsi_Host *shost = transport_class_to_shost(cdev); \
|
|
struct fc_internal *i = to_fc_internal(shost->transportt); \
|
|
if (i->f->get_host_##field) \
|
|
i->f->get_host_##field(shost); \
|
|
return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
|
|
}
|
|
|
|
#define fc_host_store_function(field) \
|
|
static ssize_t \
|
|
store_fc_host_##field(struct class_device *cdev, const char *buf, \
|
|
size_t count) \
|
|
{ \
|
|
int val; \
|
|
struct Scsi_Host *shost = transport_class_to_shost(cdev); \
|
|
struct fc_internal *i = to_fc_internal(shost->transportt); \
|
|
char *cp; \
|
|
\
|
|
val = simple_strtoul(buf, &cp, 0); \
|
|
if (*cp && (*cp != '\n')) \
|
|
return -EINVAL; \
|
|
i->f->set_host_##field(shost, val); \
|
|
return count; \
|
|
}
|
|
|
|
#define fc_host_store_str_function(field, slen) \
|
|
static ssize_t \
|
|
store_fc_host_##field(struct class_device *cdev, const char *buf, \
|
|
size_t count) \
|
|
{ \
|
|
struct Scsi_Host *shost = transport_class_to_shost(cdev); \
|
|
struct fc_internal *i = to_fc_internal(shost->transportt); \
|
|
unsigned int cnt=count; \
|
|
\
|
|
/* count may include a LF at end of string */ \
|
|
if (buf[cnt-1] == '\n') \
|
|
cnt--; \
|
|
if (cnt > ((slen) - 1)) \
|
|
return -EINVAL; \
|
|
memcpy(fc_host_##field(shost), buf, cnt); \
|
|
i->f->set_host_##field(shost); \
|
|
return count; \
|
|
}
|
|
|
|
#define fc_host_rd_attr(field, format_string, sz) \
|
|
fc_host_show_function(field, format_string, sz, ) \
|
|
static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
|
|
show_fc_host_##field, NULL)
|
|
|
|
#define fc_host_rd_attr_cast(field, format_string, sz, cast) \
|
|
fc_host_show_function(field, format_string, sz, (cast)) \
|
|
static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
|
|
show_fc_host_##field, NULL)
|
|
|
|
#define fc_host_rw_attr(field, format_string, sz) \
|
|
fc_host_show_function(field, format_string, sz, ) \
|
|
fc_host_store_function(field) \
|
|
static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
|
|
show_fc_host_##field, \
|
|
store_fc_host_##field)
|
|
|
|
#define fc_host_rd_enum_attr(title, maxlen) \
|
|
static ssize_t \
|
|
show_fc_host_##title (struct class_device *cdev, char *buf) \
|
|
{ \
|
|
struct Scsi_Host *shost = transport_class_to_shost(cdev); \
|
|
struct fc_internal *i = to_fc_internal(shost->transportt); \
|
|
const char *name; \
|
|
if (i->f->get_host_##title) \
|
|
i->f->get_host_##title(shost); \
|
|
name = get_fc_##title##_name(fc_host_##title(shost)); \
|
|
if (!name) \
|
|
return -EINVAL; \
|
|
return snprintf(buf, maxlen, "%s\n", name); \
|
|
} \
|
|
static FC_CLASS_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
|
|
|
|
#define SETUP_HOST_ATTRIBUTE_RD(field) \
|
|
i->private_host_attrs[count] = class_device_attr_host_##field; \
|
|
i->private_host_attrs[count].attr.mode = S_IRUGO; \
|
|
i->private_host_attrs[count].store = NULL; \
|
|
i->host_attrs[count] = &i->private_host_attrs[count]; \
|
|
if (i->f->show_host_##field) \
|
|
count++
|
|
|
|
#define SETUP_HOST_ATTRIBUTE_RW(field) \
|
|
i->private_host_attrs[count] = class_device_attr_host_##field; \
|
|
if (!i->f->set_host_##field) { \
|
|
i->private_host_attrs[count].attr.mode = S_IRUGO; \
|
|
i->private_host_attrs[count].store = NULL; \
|
|
} \
|
|
i->host_attrs[count] = &i->private_host_attrs[count]; \
|
|
if (i->f->show_host_##field) \
|
|
count++
|
|
|
|
|
|
#define fc_private_host_show_function(field, format_string, sz, cast) \
|
|
static ssize_t \
|
|
show_fc_host_##field (struct class_device *cdev, char *buf) \
|
|
{ \
|
|
struct Scsi_Host *shost = transport_class_to_shost(cdev); \
|
|
return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
|
|
}
|
|
|
|
#define fc_private_host_rd_attr(field, format_string, sz) \
|
|
fc_private_host_show_function(field, format_string, sz, ) \
|
|
static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
|
|
show_fc_host_##field, NULL)
|
|
|
|
#define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
|
|
fc_private_host_show_function(field, format_string, sz, (cast)) \
|
|
static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
|
|
show_fc_host_##field, NULL)
|
|
|
|
#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
|
|
i->private_host_attrs[count] = class_device_attr_host_##field; \
|
|
i->private_host_attrs[count].attr.mode = S_IRUGO; \
|
|
i->private_host_attrs[count].store = NULL; \
|
|
i->host_attrs[count] = &i->private_host_attrs[count]; \
|
|
count++
|
|
|
|
#define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
|
|
{ \
|
|
i->private_host_attrs[count] = class_device_attr_host_##field; \
|
|
i->host_attrs[count] = &i->private_host_attrs[count]; \
|
|
count++; \
|
|
}
|
|
|
|
|
|
/* Fixed Host Attributes */
|
|
|
|
static ssize_t
|
|
show_fc_host_supported_classes (struct class_device *cdev, char *buf)
|
|
{
|
|
struct Scsi_Host *shost = transport_class_to_shost(cdev);
|
|
|
|
if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
|
|
return snprintf(buf, 20, "unspecified\n");
|
|
|
|
return get_fc_cos_names(fc_host_supported_classes(shost), buf);
|
|
}
|
|
static FC_CLASS_DEVICE_ATTR(host, supported_classes, S_IRUGO,
|
|
show_fc_host_supported_classes, NULL);
|
|
|
|
static ssize_t
|
|
show_fc_host_supported_fc4s (struct class_device *cdev, char *buf)
|
|
{
|
|
struct Scsi_Host *shost = transport_class_to_shost(cdev);
|
|
return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
|
|
}
|
|
static FC_CLASS_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
|
|
show_fc_host_supported_fc4s, NULL);
|
|
|
|
static ssize_t
|
|
show_fc_host_supported_speeds (struct class_device *cdev, char *buf)
|
|
{
|
|
struct Scsi_Host *shost = transport_class_to_shost(cdev);
|
|
|
|
if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
|
|
return snprintf(buf, 20, "unknown\n");
|
|
|
|
return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
|
|
}
|
|
static FC_CLASS_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
|
|
show_fc_host_supported_speeds, NULL);
|
|
|
|
|
|
fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
|
|
fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
|
|
fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
|
|
unsigned long long);
|
|
fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
|
|
fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
|
|
|
|
|
|
/* Dynamic Host Attributes */
|
|
|
|
static ssize_t
|
|
show_fc_host_active_fc4s (struct class_device *cdev, char *buf)
|
|
{
|
|
struct Scsi_Host *shost = transport_class_to_shost(cdev);
|
|
struct fc_internal *i = to_fc_internal(shost->transportt);
|
|
|
|
if (i->f->get_host_active_fc4s)
|
|
i->f->get_host_active_fc4s(shost);
|
|
|
|
return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
|
|
}
|
|
static FC_CLASS_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
|
|
show_fc_host_active_fc4s, NULL);
|
|
|
|
static ssize_t
|
|
show_fc_host_speed (struct class_device *cdev, char *buf)
|
|
{
|
|
struct Scsi_Host *shost = transport_class_to_shost(cdev);
|
|
struct fc_internal *i = to_fc_internal(shost->transportt);
|
|
|
|
if (i->f->get_host_speed)
|
|
i->f->get_host_speed(shost);
|
|
|
|
if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
|
|
return snprintf(buf, 20, "unknown\n");
|
|
|
|
return get_fc_port_speed_names(fc_host_speed(shost), buf);
|
|
}
|
|
static FC_CLASS_DEVICE_ATTR(host, speed, S_IRUGO,
|
|
show_fc_host_speed, NULL);
|
|
|
|
|
|
fc_host_rd_attr(port_id, "0x%06x\n", 20);
|
|
fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
|
|
fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
|
|
fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
|
|
fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
|
|
|
|
fc_private_host_show_function(system_hostname, "%s\n",
|
|
FC_SYMBOLIC_NAME_SIZE + 1, )
|
|
fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
|
|
static FC_CLASS_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
|
|
show_fc_host_system_hostname, store_fc_host_system_hostname);
|
|
|
|
|
|
/* Private Host Attributes */
|
|
|
|
static ssize_t
|
|
show_fc_private_host_tgtid_bind_type(struct class_device *cdev, char *buf)
|
|
{
|
|
struct Scsi_Host *shost = transport_class_to_shost(cdev);
|
|
const char *name;
|
|
|
|
name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
|
|
if (!name)
|
|
return -EINVAL;
|
|
return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
|
|
}
|
|
|
|
#define get_list_head_entry(pos, head, member) \
|
|
pos = list_entry((head)->next, typeof(*pos), member)
|
|
|
|
static ssize_t
|
|
store_fc_private_host_tgtid_bind_type(struct class_device *cdev,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct Scsi_Host *shost = transport_class_to_shost(cdev);
|
|
struct fc_rport *rport;
|
|
enum fc_tgtid_binding_type val;
|
|
unsigned long flags;
|
|
|
|
if (get_fc_tgtid_bind_type_match(buf, &val))
|
|
return -EINVAL;
|
|
|
|
/* if changing bind type, purge all unused consistent bindings */
|
|
if (val != fc_host_tgtid_bind_type(shost)) {
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
while (!list_empty(&fc_host_rport_bindings(shost))) {
|
|
get_list_head_entry(rport,
|
|
&fc_host_rport_bindings(shost), peers);
|
|
list_del(&rport->peers);
|
|
rport->port_state = FC_PORTSTATE_DELETED;
|
|
fc_queue_work(shost, &rport->rport_delete_work);
|
|
}
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
}
|
|
|
|
fc_host_tgtid_bind_type(shost) = val;
|
|
return count;
|
|
}
|
|
|
|
static FC_CLASS_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
|
|
show_fc_private_host_tgtid_bind_type,
|
|
store_fc_private_host_tgtid_bind_type);
|
|
|
|
static ssize_t
|
|
store_fc_private_host_issue_lip(struct class_device *cdev,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct Scsi_Host *shost = transport_class_to_shost(cdev);
|
|
struct fc_internal *i = to_fc_internal(shost->transportt);
|
|
int ret;
|
|
|
|
/* ignore any data value written to the attribute */
|
|
if (i->f->issue_fc_host_lip) {
|
|
ret = i->f->issue_fc_host_lip(shost);
|
|
return ret ? ret: count;
|
|
}
|
|
|
|
return -ENOENT;
|
|
}
|
|
|
|
static FC_CLASS_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
|
|
store_fc_private_host_issue_lip);
|
|
|
|
/*
|
|
* Host Statistics Management
|
|
*/
|
|
|
|
/* Show a given an attribute in the statistics group */
|
|
static ssize_t
|
|
fc_stat_show(const struct class_device *cdev, char *buf, unsigned long offset)
|
|
{
|
|
struct Scsi_Host *shost = transport_class_to_shost(cdev);
|
|
struct fc_internal *i = to_fc_internal(shost->transportt);
|
|
struct fc_host_statistics *stats;
|
|
ssize_t ret = -ENOENT;
|
|
|
|
if (offset > sizeof(struct fc_host_statistics) ||
|
|
offset % sizeof(u64) != 0)
|
|
WARN_ON(1);
|
|
|
|
if (i->f->get_fc_host_stats) {
|
|
stats = (i->f->get_fc_host_stats)(shost);
|
|
if (stats)
|
|
ret = snprintf(buf, 20, "0x%llx\n",
|
|
(unsigned long long)*(u64 *)(((u8 *) stats) + offset));
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/* generate a read-only statistics attribute */
|
|
#define fc_host_statistic(name) \
|
|
static ssize_t show_fcstat_##name(struct class_device *cd, char *buf) \
|
|
{ \
|
|
return fc_stat_show(cd, buf, \
|
|
offsetof(struct fc_host_statistics, name)); \
|
|
} \
|
|
static FC_CLASS_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
|
|
|
|
fc_host_statistic(seconds_since_last_reset);
|
|
fc_host_statistic(tx_frames);
|
|
fc_host_statistic(tx_words);
|
|
fc_host_statistic(rx_frames);
|
|
fc_host_statistic(rx_words);
|
|
fc_host_statistic(lip_count);
|
|
fc_host_statistic(nos_count);
|
|
fc_host_statistic(error_frames);
|
|
fc_host_statistic(dumped_frames);
|
|
fc_host_statistic(link_failure_count);
|
|
fc_host_statistic(loss_of_sync_count);
|
|
fc_host_statistic(loss_of_signal_count);
|
|
fc_host_statistic(prim_seq_protocol_err_count);
|
|
fc_host_statistic(invalid_tx_word_count);
|
|
fc_host_statistic(invalid_crc_count);
|
|
fc_host_statistic(fcp_input_requests);
|
|
fc_host_statistic(fcp_output_requests);
|
|
fc_host_statistic(fcp_control_requests);
|
|
fc_host_statistic(fcp_input_megabytes);
|
|
fc_host_statistic(fcp_output_megabytes);
|
|
|
|
static ssize_t
|
|
fc_reset_statistics(struct class_device *cdev, const char *buf,
|
|
size_t count)
|
|
{
|
|
struct Scsi_Host *shost = transport_class_to_shost(cdev);
|
|
struct fc_internal *i = to_fc_internal(shost->transportt);
|
|
|
|
/* ignore any data value written to the attribute */
|
|
if (i->f->reset_fc_host_stats) {
|
|
i->f->reset_fc_host_stats(shost);
|
|
return count;
|
|
}
|
|
|
|
return -ENOENT;
|
|
}
|
|
static FC_CLASS_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
|
|
fc_reset_statistics);
|
|
|
|
|
|
static struct attribute *fc_statistics_attrs[] = {
|
|
&class_device_attr_host_seconds_since_last_reset.attr,
|
|
&class_device_attr_host_tx_frames.attr,
|
|
&class_device_attr_host_tx_words.attr,
|
|
&class_device_attr_host_rx_frames.attr,
|
|
&class_device_attr_host_rx_words.attr,
|
|
&class_device_attr_host_lip_count.attr,
|
|
&class_device_attr_host_nos_count.attr,
|
|
&class_device_attr_host_error_frames.attr,
|
|
&class_device_attr_host_dumped_frames.attr,
|
|
&class_device_attr_host_link_failure_count.attr,
|
|
&class_device_attr_host_loss_of_sync_count.attr,
|
|
&class_device_attr_host_loss_of_signal_count.attr,
|
|
&class_device_attr_host_prim_seq_protocol_err_count.attr,
|
|
&class_device_attr_host_invalid_tx_word_count.attr,
|
|
&class_device_attr_host_invalid_crc_count.attr,
|
|
&class_device_attr_host_fcp_input_requests.attr,
|
|
&class_device_attr_host_fcp_output_requests.attr,
|
|
&class_device_attr_host_fcp_control_requests.attr,
|
|
&class_device_attr_host_fcp_input_megabytes.attr,
|
|
&class_device_attr_host_fcp_output_megabytes.attr,
|
|
&class_device_attr_host_reset_statistics.attr,
|
|
NULL
|
|
};
|
|
|
|
static struct attribute_group fc_statistics_group = {
|
|
.name = "statistics",
|
|
.attrs = fc_statistics_attrs,
|
|
};
|
|
|
|
static int fc_host_match(struct attribute_container *cont,
|
|
struct device *dev)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
struct fc_internal *i;
|
|
|
|
if (!scsi_is_host_device(dev))
|
|
return 0;
|
|
|
|
shost = dev_to_shost(dev);
|
|
if (!shost->transportt || shost->transportt->host_attrs.ac.class
|
|
!= &fc_host_class.class)
|
|
return 0;
|
|
|
|
i = to_fc_internal(shost->transportt);
|
|
|
|
return &i->t.host_attrs.ac == cont;
|
|
}
|
|
|
|
static int fc_target_match(struct attribute_container *cont,
|
|
struct device *dev)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
struct fc_internal *i;
|
|
|
|
if (!scsi_is_target_device(dev))
|
|
return 0;
|
|
|
|
shost = dev_to_shost(dev->parent);
|
|
if (!shost->transportt || shost->transportt->host_attrs.ac.class
|
|
!= &fc_host_class.class)
|
|
return 0;
|
|
|
|
i = to_fc_internal(shost->transportt);
|
|
|
|
return &i->t.target_attrs.ac == cont;
|
|
}
|
|
|
|
static void fc_rport_dev_release(struct device *dev)
|
|
{
|
|
struct fc_rport *rport = dev_to_rport(dev);
|
|
put_device(dev->parent);
|
|
kfree(rport);
|
|
}
|
|
|
|
int scsi_is_fc_rport(const struct device *dev)
|
|
{
|
|
return dev->release == fc_rport_dev_release;
|
|
}
|
|
EXPORT_SYMBOL(scsi_is_fc_rport);
|
|
|
|
static int fc_rport_match(struct attribute_container *cont,
|
|
struct device *dev)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
struct fc_internal *i;
|
|
|
|
if (!scsi_is_fc_rport(dev))
|
|
return 0;
|
|
|
|
shost = dev_to_shost(dev->parent);
|
|
if (!shost->transportt || shost->transportt->host_attrs.ac.class
|
|
!= &fc_host_class.class)
|
|
return 0;
|
|
|
|
i = to_fc_internal(shost->transportt);
|
|
|
|
return &i->rport_attr_cont.ac == cont;
|
|
}
|
|
|
|
|
|
/**
|
|
* fc_timed_out - FC Transport I/O timeout intercept handler
|
|
*
|
|
* @scmd: The SCSI command which timed out
|
|
*
|
|
* This routine protects against error handlers getting invoked while a
|
|
* rport is in a blocked state, typically due to a temporarily loss of
|
|
* connectivity. If the error handlers are allowed to proceed, requests
|
|
* to abort i/o, reset the target, etc will likely fail as there is no way
|
|
* to communicate with the device to perform the requested function. These
|
|
* failures may result in the midlayer taking the device offline, requiring
|
|
* manual intervention to restore operation.
|
|
*
|
|
* This routine, called whenever an i/o times out, validates the state of
|
|
* the underlying rport. If the rport is blocked, it returns
|
|
* EH_RESET_TIMER, which will continue to reschedule the timeout.
|
|
* Eventually, either the device will return, or devloss_tmo will fire,
|
|
* and when the timeout then fires, it will be handled normally.
|
|
* If the rport is not blocked, normal error handling continues.
|
|
*
|
|
* Notes:
|
|
* This routine assumes no locks are held on entry.
|
|
**/
|
|
static enum scsi_eh_timer_return
|
|
fc_timed_out(struct scsi_cmnd *scmd)
|
|
{
|
|
struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
|
|
|
|
if (rport->port_state == FC_PORTSTATE_BLOCKED)
|
|
return EH_RESET_TIMER;
|
|
|
|
return EH_NOT_HANDLED;
|
|
}
|
|
|
|
/*
|
|
* Must be called with shost->host_lock held
|
|
*/
|
|
static int fc_user_scan(struct Scsi_Host *shost, uint channel,
|
|
uint id, uint lun)
|
|
{
|
|
struct fc_rport *rport;
|
|
|
|
list_for_each_entry(rport, &fc_host_rports(shost), peers) {
|
|
if (rport->scsi_target_id == -1)
|
|
continue;
|
|
|
|
if ((channel == SCAN_WILD_CARD || channel == rport->channel) &&
|
|
(id == SCAN_WILD_CARD || id == rport->scsi_target_id)) {
|
|
scsi_scan_target(&rport->dev, rport->channel,
|
|
rport->scsi_target_id, lun, 1);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct scsi_transport_template *
|
|
fc_attach_transport(struct fc_function_template *ft)
|
|
{
|
|
int count;
|
|
struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
|
|
GFP_KERNEL);
|
|
|
|
if (unlikely(!i))
|
|
return NULL;
|
|
|
|
i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
|
|
i->t.target_attrs.ac.class = &fc_transport_class.class;
|
|
i->t.target_attrs.ac.match = fc_target_match;
|
|
i->t.target_size = sizeof(struct fc_starget_attrs);
|
|
transport_container_register(&i->t.target_attrs);
|
|
|
|
i->t.host_attrs.ac.attrs = &i->host_attrs[0];
|
|
i->t.host_attrs.ac.class = &fc_host_class.class;
|
|
i->t.host_attrs.ac.match = fc_host_match;
|
|
i->t.host_size = sizeof(struct fc_host_attrs);
|
|
if (ft->get_fc_host_stats)
|
|
i->t.host_attrs.statistics = &fc_statistics_group;
|
|
transport_container_register(&i->t.host_attrs);
|
|
|
|
i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
|
|
i->rport_attr_cont.ac.class = &fc_rport_class.class;
|
|
i->rport_attr_cont.ac.match = fc_rport_match;
|
|
transport_container_register(&i->rport_attr_cont);
|
|
|
|
i->f = ft;
|
|
|
|
/* Transport uses the shost workq for scsi scanning */
|
|
i->t.create_work_queue = 1;
|
|
|
|
i->t.eh_timed_out = fc_timed_out;
|
|
|
|
i->t.user_scan = fc_user_scan;
|
|
|
|
/*
|
|
* Setup SCSI Target Attributes.
|
|
*/
|
|
count = 0;
|
|
SETUP_STARGET_ATTRIBUTE_RD(node_name);
|
|
SETUP_STARGET_ATTRIBUTE_RD(port_name);
|
|
SETUP_STARGET_ATTRIBUTE_RD(port_id);
|
|
|
|
BUG_ON(count > FC_STARGET_NUM_ATTRS);
|
|
|
|
i->starget_attrs[count] = NULL;
|
|
|
|
|
|
/*
|
|
* Setup SCSI Host Attributes.
|
|
*/
|
|
count=0;
|
|
SETUP_HOST_ATTRIBUTE_RD(node_name);
|
|
SETUP_HOST_ATTRIBUTE_RD(port_name);
|
|
SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
|
|
SETUP_HOST_ATTRIBUTE_RD(supported_classes);
|
|
SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
|
|
SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
|
|
SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
|
|
SETUP_HOST_ATTRIBUTE_RD(serial_number);
|
|
|
|
SETUP_HOST_ATTRIBUTE_RD(port_id);
|
|
SETUP_HOST_ATTRIBUTE_RD(port_type);
|
|
SETUP_HOST_ATTRIBUTE_RD(port_state);
|
|
SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
|
|
SETUP_HOST_ATTRIBUTE_RD(speed);
|
|
SETUP_HOST_ATTRIBUTE_RD(fabric_name);
|
|
SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
|
|
SETUP_HOST_ATTRIBUTE_RW(system_hostname);
|
|
|
|
/* Transport-managed attributes */
|
|
SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
|
|
if (ft->issue_fc_host_lip)
|
|
SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
|
|
|
|
BUG_ON(count > FC_HOST_NUM_ATTRS);
|
|
|
|
i->host_attrs[count] = NULL;
|
|
|
|
/*
|
|
* Setup Remote Port Attributes.
|
|
*/
|
|
count=0;
|
|
SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
|
|
SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
|
|
SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
|
|
SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
|
|
SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
|
|
SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
|
|
SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
|
|
SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
|
|
SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
|
|
if (ft->terminate_rport_io)
|
|
SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
|
|
|
|
BUG_ON(count > FC_RPORT_NUM_ATTRS);
|
|
|
|
i->rport_attrs[count] = NULL;
|
|
|
|
return &i->t;
|
|
}
|
|
EXPORT_SYMBOL(fc_attach_transport);
|
|
|
|
void fc_release_transport(struct scsi_transport_template *t)
|
|
{
|
|
struct fc_internal *i = to_fc_internal(t);
|
|
|
|
transport_container_unregister(&i->t.target_attrs);
|
|
transport_container_unregister(&i->t.host_attrs);
|
|
transport_container_unregister(&i->rport_attr_cont);
|
|
|
|
kfree(i);
|
|
}
|
|
EXPORT_SYMBOL(fc_release_transport);
|
|
|
|
/**
|
|
* fc_queue_work - Queue work to the fc_host workqueue.
|
|
* @shost: Pointer to Scsi_Host bound to fc_host.
|
|
* @work: Work to queue for execution.
|
|
*
|
|
* Return value:
|
|
* 1 - work queued for execution
|
|
* 0 - work is already queued
|
|
* -EINVAL - work queue doesn't exist
|
|
**/
|
|
static int
|
|
fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
|
|
{
|
|
if (unlikely(!fc_host_work_q(shost))) {
|
|
printk(KERN_ERR
|
|
"ERROR: FC host '%s' attempted to queue work, "
|
|
"when no workqueue created.\n", shost->hostt->name);
|
|
dump_stack();
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
return queue_work(fc_host_work_q(shost), work);
|
|
}
|
|
|
|
/**
|
|
* fc_flush_work - Flush a fc_host's workqueue.
|
|
* @shost: Pointer to Scsi_Host bound to fc_host.
|
|
**/
|
|
static void
|
|
fc_flush_work(struct Scsi_Host *shost)
|
|
{
|
|
if (!fc_host_work_q(shost)) {
|
|
printk(KERN_ERR
|
|
"ERROR: FC host '%s' attempted to flush work, "
|
|
"when no workqueue created.\n", shost->hostt->name);
|
|
dump_stack();
|
|
return;
|
|
}
|
|
|
|
flush_workqueue(fc_host_work_q(shost));
|
|
}
|
|
|
|
/**
|
|
* fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
|
|
* @shost: Pointer to Scsi_Host bound to fc_host.
|
|
* @work: Work to queue for execution.
|
|
* @delay: jiffies to delay the work queuing
|
|
*
|
|
* Return value:
|
|
* 1 on success / 0 already queued / < 0 for error
|
|
**/
|
|
static int
|
|
fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
|
|
unsigned long delay)
|
|
{
|
|
if (unlikely(!fc_host_devloss_work_q(shost))) {
|
|
printk(KERN_ERR
|
|
"ERROR: FC host '%s' attempted to queue work, "
|
|
"when no workqueue created.\n", shost->hostt->name);
|
|
dump_stack();
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
|
|
}
|
|
|
|
/**
|
|
* fc_flush_devloss - Flush a fc_host's devloss workqueue.
|
|
* @shost: Pointer to Scsi_Host bound to fc_host.
|
|
**/
|
|
static void
|
|
fc_flush_devloss(struct Scsi_Host *shost)
|
|
{
|
|
if (!fc_host_devloss_work_q(shost)) {
|
|
printk(KERN_ERR
|
|
"ERROR: FC host '%s' attempted to flush work, "
|
|
"when no workqueue created.\n", shost->hostt->name);
|
|
dump_stack();
|
|
return;
|
|
}
|
|
|
|
flush_workqueue(fc_host_devloss_work_q(shost));
|
|
}
|
|
|
|
|
|
/**
|
|
* fc_remove_host - called to terminate any fc_transport-related elements
|
|
* for a scsi host.
|
|
* @rport: remote port to be unblocked.
|
|
*
|
|
* This routine is expected to be called immediately preceeding the
|
|
* a driver's call to scsi_remove_host().
|
|
*
|
|
* WARNING: A driver utilizing the fc_transport, which fails to call
|
|
* this routine prior to scsi_remote_host(), will leave dangling
|
|
* objects in /sys/class/fc_remote_ports. Access to any of these
|
|
* objects can result in a system crash !!!
|
|
*
|
|
* Notes:
|
|
* This routine assumes no locks are held on entry.
|
|
**/
|
|
void
|
|
fc_remove_host(struct Scsi_Host *shost)
|
|
{
|
|
struct fc_rport *rport, *next_rport;
|
|
struct workqueue_struct *work_q;
|
|
struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
|
|
|
|
/* Remove any remote ports */
|
|
list_for_each_entry_safe(rport, next_rport,
|
|
&fc_host->rports, peers) {
|
|
list_del(&rport->peers);
|
|
rport->port_state = FC_PORTSTATE_DELETED;
|
|
fc_queue_work(shost, &rport->rport_delete_work);
|
|
}
|
|
|
|
list_for_each_entry_safe(rport, next_rport,
|
|
&fc_host->rport_bindings, peers) {
|
|
list_del(&rport->peers);
|
|
rport->port_state = FC_PORTSTATE_DELETED;
|
|
fc_queue_work(shost, &rport->rport_delete_work);
|
|
}
|
|
|
|
/* flush all scan work items */
|
|
scsi_flush_work(shost);
|
|
|
|
/* flush all stgt delete, and rport delete work items, then kill it */
|
|
if (fc_host->work_q) {
|
|
work_q = fc_host->work_q;
|
|
fc_host->work_q = NULL;
|
|
destroy_workqueue(work_q);
|
|
}
|
|
|
|
/* flush all devloss work items, then kill it */
|
|
if (fc_host->devloss_work_q) {
|
|
work_q = fc_host->devloss_work_q;
|
|
fc_host->devloss_work_q = NULL;
|
|
destroy_workqueue(work_q);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(fc_remove_host);
|
|
|
|
|
|
/**
|
|
* fc_starget_delete - called to delete the scsi decendents of an rport
|
|
* (target and all sdevs)
|
|
*
|
|
* @work: remote port to be operated on.
|
|
**/
|
|
static void
|
|
fc_starget_delete(struct work_struct *work)
|
|
{
|
|
struct fc_rport *rport =
|
|
container_of(work, struct fc_rport, stgt_delete_work);
|
|
struct Scsi_Host *shost = rport_to_shost(rport);
|
|
unsigned long flags;
|
|
struct fc_internal *i = to_fc_internal(shost->transportt);
|
|
|
|
/*
|
|
* Involve the LLDD if possible. All io on the rport is to
|
|
* be terminated, either as part of the dev_loss_tmo callback
|
|
* processing, or via the terminate_rport_io function.
|
|
*/
|
|
if (i->f->dev_loss_tmo_callbk)
|
|
i->f->dev_loss_tmo_callbk(rport);
|
|
else if (i->f->terminate_rport_io)
|
|
i->f->terminate_rport_io(rport);
|
|
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
if (!cancel_delayed_work(&rport->fail_io_work))
|
|
fc_flush_devloss(shost);
|
|
if (!cancel_delayed_work(&rport->dev_loss_work))
|
|
fc_flush_devloss(shost);
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
|
|
}
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
|
|
scsi_remove_target(&rport->dev);
|
|
}
|
|
|
|
|
|
/**
|
|
* fc_rport_final_delete - finish rport termination and delete it.
|
|
*
|
|
* @work: remote port to be deleted.
|
|
**/
|
|
static void
|
|
fc_rport_final_delete(struct work_struct *work)
|
|
{
|
|
struct fc_rport *rport =
|
|
container_of(work, struct fc_rport, rport_delete_work);
|
|
struct device *dev = &rport->dev;
|
|
struct Scsi_Host *shost = rport_to_shost(rport);
|
|
struct fc_internal *i = to_fc_internal(shost->transportt);
|
|
|
|
/*
|
|
* if a scan is pending, flush the SCSI Host work_q so that
|
|
* that we can reclaim the rport scan work element.
|
|
*/
|
|
if (rport->flags & FC_RPORT_SCAN_PENDING)
|
|
scsi_flush_work(shost);
|
|
|
|
/* Delete SCSI target and sdevs */
|
|
if (rport->scsi_target_id != -1)
|
|
fc_starget_delete(&rport->stgt_delete_work);
|
|
else if (i->f->dev_loss_tmo_callbk)
|
|
i->f->dev_loss_tmo_callbk(rport);
|
|
else if (i->f->terminate_rport_io)
|
|
i->f->terminate_rport_io(rport);
|
|
|
|
transport_remove_device(dev);
|
|
device_del(dev);
|
|
transport_destroy_device(dev);
|
|
put_device(&shost->shost_gendev); /* for fc_host->rport list */
|
|
put_device(dev); /* for self-reference */
|
|
}
|
|
|
|
|
|
/**
|
|
* fc_rport_create - allocates and creates a remote FC port.
|
|
* @shost: scsi host the remote port is connected to.
|
|
* @channel: Channel on shost port connected to.
|
|
* @ids: The world wide names, fc address, and FC4 port
|
|
* roles for the remote port.
|
|
*
|
|
* Allocates and creates the remoter port structure, including the
|
|
* class and sysfs creation.
|
|
*
|
|
* Notes:
|
|
* This routine assumes no locks are held on entry.
|
|
**/
|
|
struct fc_rport *
|
|
fc_rport_create(struct Scsi_Host *shost, int channel,
|
|
struct fc_rport_identifiers *ids)
|
|
{
|
|
struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
|
|
struct fc_internal *fci = to_fc_internal(shost->transportt);
|
|
struct fc_rport *rport;
|
|
struct device *dev;
|
|
unsigned long flags;
|
|
int error;
|
|
size_t size;
|
|
|
|
size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
|
|
rport = kzalloc(size, GFP_KERNEL);
|
|
if (unlikely(!rport)) {
|
|
printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__);
|
|
return NULL;
|
|
}
|
|
|
|
rport->maxframe_size = -1;
|
|
rport->supported_classes = FC_COS_UNSPECIFIED;
|
|
rport->dev_loss_tmo = fc_dev_loss_tmo;
|
|
memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
|
|
memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
|
|
rport->port_id = ids->port_id;
|
|
rport->roles = ids->roles;
|
|
rport->port_state = FC_PORTSTATE_ONLINE;
|
|
if (fci->f->dd_fcrport_size)
|
|
rport->dd_data = &rport[1];
|
|
rport->channel = channel;
|
|
rport->fast_io_fail_tmo = -1;
|
|
|
|
INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
|
|
INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
|
|
INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
|
|
INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
|
|
INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
|
|
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
|
|
rport->number = fc_host->next_rport_number++;
|
|
if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
|
|
rport->scsi_target_id = fc_host->next_target_id++;
|
|
else
|
|
rport->scsi_target_id = -1;
|
|
list_add_tail(&rport->peers, &fc_host->rports);
|
|
get_device(&shost->shost_gendev); /* for fc_host->rport list */
|
|
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
|
|
dev = &rport->dev;
|
|
device_initialize(dev); /* takes self reference */
|
|
dev->parent = get_device(&shost->shost_gendev); /* parent reference */
|
|
dev->release = fc_rport_dev_release;
|
|
sprintf(dev->bus_id, "rport-%d:%d-%d",
|
|
shost->host_no, channel, rport->number);
|
|
transport_setup_device(dev);
|
|
|
|
error = device_add(dev);
|
|
if (error) {
|
|
printk(KERN_ERR "FC Remote Port device_add failed\n");
|
|
goto delete_rport;
|
|
}
|
|
transport_add_device(dev);
|
|
transport_configure_device(dev);
|
|
|
|
if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) {
|
|
/* initiate a scan of the target */
|
|
rport->flags |= FC_RPORT_SCAN_PENDING;
|
|
scsi_queue_work(shost, &rport->scan_work);
|
|
}
|
|
|
|
return rport;
|
|
|
|
delete_rport:
|
|
transport_destroy_device(dev);
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
list_del(&rport->peers);
|
|
put_device(&shost->shost_gendev); /* for fc_host->rport list */
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
put_device(dev->parent);
|
|
kfree(rport);
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* fc_remote_port_add - notifies the fc transport of the existence
|
|
* of a remote FC port.
|
|
* @shost: scsi host the remote port is connected to.
|
|
* @channel: Channel on shost port connected to.
|
|
* @ids: The world wide names, fc address, and FC4 port
|
|
* roles for the remote port.
|
|
*
|
|
* The LLDD calls this routine to notify the transport of the existence
|
|
* of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
|
|
* of the port, it's FC address (port_id), and the FC4 roles that are
|
|
* active for the port.
|
|
*
|
|
* For ports that are FCP targets (aka scsi targets), the FC transport
|
|
* maintains consistent target id bindings on behalf of the LLDD.
|
|
* A consistent target id binding is an assignment of a target id to
|
|
* a remote port identifier, which persists while the scsi host is
|
|
* attached. The remote port can disappear, then later reappear, and
|
|
* it's target id assignment remains the same. This allows for shifts
|
|
* in FC addressing (if binding by wwpn or wwnn) with no apparent
|
|
* changes to the scsi subsystem which is based on scsi host number and
|
|
* target id values. Bindings are only valid during the attachment of
|
|
* the scsi host. If the host detaches, then later re-attaches, target
|
|
* id bindings may change.
|
|
*
|
|
* This routine is responsible for returning a remote port structure.
|
|
* The routine will search the list of remote ports it maintains
|
|
* internally on behalf of consistent target id mappings. If found, the
|
|
* remote port structure will be reused. Otherwise, a new remote port
|
|
* structure will be allocated.
|
|
*
|
|
* Whenever a remote port is allocated, a new fc_remote_port class
|
|
* device is created.
|
|
*
|
|
* Should not be called from interrupt context.
|
|
*
|
|
* Notes:
|
|
* This routine assumes no locks are held on entry.
|
|
**/
|
|
struct fc_rport *
|
|
fc_remote_port_add(struct Scsi_Host *shost, int channel,
|
|
struct fc_rport_identifiers *ids)
|
|
{
|
|
struct fc_internal *fci = to_fc_internal(shost->transportt);
|
|
struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
|
|
struct fc_rport *rport;
|
|
unsigned long flags;
|
|
int match = 0;
|
|
|
|
/* ensure any stgt delete functions are done */
|
|
fc_flush_work(shost);
|
|
|
|
/*
|
|
* Search the list of "active" rports, for an rport that has been
|
|
* deleted, but we've held off the real delete while the target
|
|
* is in a "blocked" state.
|
|
*/
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
|
|
list_for_each_entry(rport, &fc_host->rports, peers) {
|
|
|
|
if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
|
|
(rport->channel == channel)) {
|
|
|
|
switch (fc_host->tgtid_bind_type) {
|
|
case FC_TGTID_BIND_BY_WWPN:
|
|
case FC_TGTID_BIND_NONE:
|
|
if (rport->port_name == ids->port_name)
|
|
match = 1;
|
|
break;
|
|
case FC_TGTID_BIND_BY_WWNN:
|
|
if (rport->node_name == ids->node_name)
|
|
match = 1;
|
|
break;
|
|
case FC_TGTID_BIND_BY_ID:
|
|
if (rport->port_id == ids->port_id)
|
|
match = 1;
|
|
break;
|
|
}
|
|
|
|
if (match) {
|
|
struct delayed_work *work =
|
|
&rport->dev_loss_work;
|
|
|
|
memcpy(&rport->node_name, &ids->node_name,
|
|
sizeof(rport->node_name));
|
|
memcpy(&rport->port_name, &ids->port_name,
|
|
sizeof(rport->port_name));
|
|
rport->port_id = ids->port_id;
|
|
|
|
rport->port_state = FC_PORTSTATE_ONLINE;
|
|
rport->roles = ids->roles;
|
|
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
|
|
if (fci->f->dd_fcrport_size)
|
|
memset(rport->dd_data, 0,
|
|
fci->f->dd_fcrport_size);
|
|
|
|
/*
|
|
* If we were blocked, we were a target.
|
|
* If no longer a target, we leave the timer
|
|
* running in case the port changes roles
|
|
* prior to the timer expiring. If the timer
|
|
* fires, the target will be torn down.
|
|
*/
|
|
if (!(ids->roles & FC_RPORT_ROLE_FCP_TARGET))
|
|
return rport;
|
|
|
|
/* restart the target */
|
|
|
|
/*
|
|
* Stop the target timers first. Take no action
|
|
* on the del_timer failure as the state
|
|
* machine state change will validate the
|
|
* transaction.
|
|
*/
|
|
if (!cancel_delayed_work(&rport->fail_io_work))
|
|
fc_flush_devloss(shost);
|
|
if (!cancel_delayed_work(work))
|
|
fc_flush_devloss(shost);
|
|
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
|
|
rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
|
|
|
|
/* initiate a scan of the target */
|
|
rport->flags |= FC_RPORT_SCAN_PENDING;
|
|
scsi_queue_work(shost, &rport->scan_work);
|
|
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
|
|
scsi_target_unblock(&rport->dev);
|
|
|
|
return rport;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Search the bindings array */
|
|
if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
|
|
|
|
/* search for a matching consistent binding */
|
|
|
|
list_for_each_entry(rport, &fc_host->rport_bindings,
|
|
peers) {
|
|
if (rport->channel != channel)
|
|
continue;
|
|
|
|
switch (fc_host->tgtid_bind_type) {
|
|
case FC_TGTID_BIND_BY_WWPN:
|
|
if (rport->port_name == ids->port_name)
|
|
match = 1;
|
|
break;
|
|
case FC_TGTID_BIND_BY_WWNN:
|
|
if (rport->node_name == ids->node_name)
|
|
match = 1;
|
|
break;
|
|
case FC_TGTID_BIND_BY_ID:
|
|
if (rport->port_id == ids->port_id)
|
|
match = 1;
|
|
break;
|
|
case FC_TGTID_BIND_NONE: /* to keep compiler happy */
|
|
break;
|
|
}
|
|
|
|
if (match) {
|
|
list_move_tail(&rport->peers, &fc_host->rports);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (match) {
|
|
memcpy(&rport->node_name, &ids->node_name,
|
|
sizeof(rport->node_name));
|
|
memcpy(&rport->port_name, &ids->port_name,
|
|
sizeof(rport->port_name));
|
|
rport->port_id = ids->port_id;
|
|
rport->roles = ids->roles;
|
|
rport->port_state = FC_PORTSTATE_ONLINE;
|
|
|
|
if (fci->f->dd_fcrport_size)
|
|
memset(rport->dd_data, 0,
|
|
fci->f->dd_fcrport_size);
|
|
|
|
if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) {
|
|
/* initiate a scan of the target */
|
|
rport->flags |= FC_RPORT_SCAN_PENDING;
|
|
scsi_queue_work(shost, &rport->scan_work);
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
scsi_target_unblock(&rport->dev);
|
|
} else
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
|
|
return rport;
|
|
}
|
|
}
|
|
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
|
|
/* No consistent binding found - create new remote port entry */
|
|
rport = fc_rport_create(shost, channel, ids);
|
|
|
|
return rport;
|
|
}
|
|
EXPORT_SYMBOL(fc_remote_port_add);
|
|
|
|
|
|
/**
|
|
* fc_remote_port_delete - notifies the fc transport that a remote
|
|
* port is no longer in existence.
|
|
* @rport: The remote port that no longer exists
|
|
*
|
|
* The LLDD calls this routine to notify the transport that a remote
|
|
* port is no longer part of the topology. Note: Although a port
|
|
* may no longer be part of the topology, it may persist in the remote
|
|
* ports displayed by the fc_host. We do this under 2 conditions:
|
|
* - If the port was a scsi target, we delay its deletion by "blocking" it.
|
|
* This allows the port to temporarily disappear, then reappear without
|
|
* disrupting the SCSI device tree attached to it. During the "blocked"
|
|
* period the port will still exist.
|
|
* - If the port was a scsi target and disappears for longer than we
|
|
* expect, we'll delete the port and the tear down the SCSI device tree
|
|
* attached to it. However, we want to semi-persist the target id assigned
|
|
* to that port if it eventually does exist. The port structure will
|
|
* remain (although with minimal information) so that the target id
|
|
* bindings remails.
|
|
*
|
|
* If the remote port is not an FCP Target, it will be fully torn down
|
|
* and deallocated, including the fc_remote_port class device.
|
|
*
|
|
* If the remote port is an FCP Target, the port will be placed in a
|
|
* temporary blocked state. From the LLDD's perspective, the rport no
|
|
* longer exists. From the SCSI midlayer's perspective, the SCSI target
|
|
* exists, but all sdevs on it are blocked from further I/O. The following
|
|
* is then expected:
|
|
* If the remote port does not return (signaled by a LLDD call to
|
|
* fc_remote_port_add()) within the dev_loss_tmo timeout, then the
|
|
* scsi target is removed - killing all outstanding i/o and removing the
|
|
* scsi devices attached ot it. The port structure will be marked Not
|
|
* Present and be partially cleared, leaving only enough information to
|
|
* recognize the remote port relative to the scsi target id binding if
|
|
* it later appears. The port will remain as long as there is a valid
|
|
* binding (e.g. until the user changes the binding type or unloads the
|
|
* scsi host with the binding).
|
|
*
|
|
* If the remote port returns within the dev_loss_tmo value (and matches
|
|
* according to the target id binding type), the port structure will be
|
|
* reused. If it is no longer a SCSI target, the target will be torn
|
|
* down. If it continues to be a SCSI target, then the target will be
|
|
* unblocked (allowing i/o to be resumed), and a scan will be activated
|
|
* to ensure that all luns are detected.
|
|
*
|
|
* Called from normal process context only - cannot be called from interrupt.
|
|
*
|
|
* Notes:
|
|
* This routine assumes no locks are held on entry.
|
|
**/
|
|
void
|
|
fc_remote_port_delete(struct fc_rport *rport)
|
|
{
|
|
struct Scsi_Host *shost = rport_to_shost(rport);
|
|
struct fc_internal *i = to_fc_internal(shost->transportt);
|
|
int timeout = rport->dev_loss_tmo;
|
|
unsigned long flags;
|
|
|
|
/*
|
|
* No need to flush the fc_host work_q's, as all adds are synchronous.
|
|
*
|
|
* We do need to reclaim the rport scan work element, so eventually
|
|
* (in fc_rport_final_delete()) we'll flush the scsi host work_q if
|
|
* there's still a scan pending.
|
|
*/
|
|
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
|
|
/* If no scsi target id mapping, delete it */
|
|
if (rport->scsi_target_id == -1) {
|
|
list_del(&rport->peers);
|
|
rport->port_state = FC_PORTSTATE_DELETED;
|
|
fc_queue_work(shost, &rport->rport_delete_work);
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
return;
|
|
}
|
|
|
|
rport->port_state = FC_PORTSTATE_BLOCKED;
|
|
|
|
rport->flags |= FC_RPORT_DEVLOSS_PENDING;
|
|
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
|
|
scsi_target_block(&rport->dev);
|
|
|
|
/* see if we need to kill io faster than waiting for device loss */
|
|
if ((rport->fast_io_fail_tmo != -1) &&
|
|
(rport->fast_io_fail_tmo < timeout) && (i->f->terminate_rport_io))
|
|
fc_queue_devloss_work(shost, &rport->fail_io_work,
|
|
rport->fast_io_fail_tmo * HZ);
|
|
|
|
/* cap the length the devices can be blocked until they are deleted */
|
|
fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
|
|
}
|
|
EXPORT_SYMBOL(fc_remote_port_delete);
|
|
|
|
/**
|
|
* fc_remote_port_rolechg - notifies the fc transport that the roles
|
|
* on a remote may have changed.
|
|
* @rport: The remote port that changed.
|
|
*
|
|
* The LLDD calls this routine to notify the transport that the roles
|
|
* on a remote port may have changed. The largest effect of this is
|
|
* if a port now becomes a FCP Target, it must be allocated a
|
|
* scsi target id. If the port is no longer a FCP target, any
|
|
* scsi target id value assigned to it will persist in case the
|
|
* role changes back to include FCP Target. No changes in the scsi
|
|
* midlayer will be invoked if the role changes (in the expectation
|
|
* that the role will be resumed. If it doesn't normal error processing
|
|
* will take place).
|
|
*
|
|
* Should not be called from interrupt context.
|
|
*
|
|
* Notes:
|
|
* This routine assumes no locks are held on entry.
|
|
**/
|
|
void
|
|
fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
|
|
{
|
|
struct Scsi_Host *shost = rport_to_shost(rport);
|
|
struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
|
|
unsigned long flags;
|
|
int create = 0;
|
|
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
if (roles & FC_RPORT_ROLE_FCP_TARGET) {
|
|
if (rport->scsi_target_id == -1) {
|
|
rport->scsi_target_id = fc_host->next_target_id++;
|
|
create = 1;
|
|
} else if (!(rport->roles & FC_RPORT_ROLE_FCP_TARGET))
|
|
create = 1;
|
|
}
|
|
|
|
rport->roles = roles;
|
|
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
|
|
if (create) {
|
|
/*
|
|
* There may have been a delete timer running on the
|
|
* port. Ensure that it is cancelled as we now know
|
|
* the port is an FCP Target.
|
|
* Note: we know the rport is exists and in an online
|
|
* state as the LLDD would not have had an rport
|
|
* reference to pass us.
|
|
*
|
|
* Take no action on the del_timer failure as the state
|
|
* machine state change will validate the
|
|
* transaction.
|
|
*/
|
|
if (!cancel_delayed_work(&rport->fail_io_work))
|
|
fc_flush_devloss(shost);
|
|
if (!cancel_delayed_work(&rport->dev_loss_work))
|
|
fc_flush_devloss(shost);
|
|
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
|
|
/* ensure any stgt delete functions are done */
|
|
fc_flush_work(shost);
|
|
|
|
/* initiate a scan of the target */
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
rport->flags |= FC_RPORT_SCAN_PENDING;
|
|
scsi_queue_work(shost, &rport->scan_work);
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
scsi_target_unblock(&rport->dev);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(fc_remote_port_rolechg);
|
|
|
|
/**
|
|
* fc_timeout_deleted_rport - Timeout handler for a deleted remote port that
|
|
* was a SCSI target (thus was blocked), and failed
|
|
* to return in the alloted time.
|
|
*
|
|
* @work: rport target that failed to reappear in the alloted time.
|
|
**/
|
|
static void
|
|
fc_timeout_deleted_rport(struct work_struct *work)
|
|
{
|
|
struct fc_rport *rport =
|
|
container_of(work, struct fc_rport, dev_loss_work.work);
|
|
struct Scsi_Host *shost = rport_to_shost(rport);
|
|
struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
|
|
rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
|
|
|
|
/*
|
|
* If the port is ONLINE, then it came back. Validate it's still an
|
|
* FCP target. If not, tear down the scsi_target on it.
|
|
*/
|
|
if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
|
|
!(rport->roles & FC_RPORT_ROLE_FCP_TARGET)) {
|
|
dev_printk(KERN_ERR, &rport->dev,
|
|
"blocked FC remote port time out: no longer"
|
|
" a FCP target, removing starget\n");
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
scsi_target_unblock(&rport->dev);
|
|
fc_queue_work(shost, &rport->stgt_delete_work);
|
|
return;
|
|
}
|
|
|
|
if (rport->port_state != FC_PORTSTATE_BLOCKED) {
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
dev_printk(KERN_ERR, &rport->dev,
|
|
"blocked FC remote port time out: leaving target alone\n");
|
|
return;
|
|
}
|
|
|
|
if (fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) {
|
|
list_del(&rport->peers);
|
|
rport->port_state = FC_PORTSTATE_DELETED;
|
|
dev_printk(KERN_ERR, &rport->dev,
|
|
"blocked FC remote port time out: removing target\n");
|
|
fc_queue_work(shost, &rport->rport_delete_work);
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
return;
|
|
}
|
|
|
|
dev_printk(KERN_ERR, &rport->dev,
|
|
"blocked FC remote port time out: removing target and "
|
|
"saving binding\n");
|
|
|
|
list_move_tail(&rport->peers, &fc_host->rport_bindings);
|
|
|
|
/*
|
|
* Note: We do not remove or clear the hostdata area. This allows
|
|
* host-specific target data to persist along with the
|
|
* scsi_target_id. It's up to the host to manage it's hostdata area.
|
|
*/
|
|
|
|
/*
|
|
* Reinitialize port attributes that may change if the port comes back.
|
|
*/
|
|
rport->maxframe_size = -1;
|
|
rport->supported_classes = FC_COS_UNSPECIFIED;
|
|
rport->roles = FC_RPORT_ROLE_UNKNOWN;
|
|
rport->port_state = FC_PORTSTATE_NOTPRESENT;
|
|
|
|
/* remove the identifiers that aren't used in the consisting binding */
|
|
switch (fc_host->tgtid_bind_type) {
|
|
case FC_TGTID_BIND_BY_WWPN:
|
|
rport->node_name = -1;
|
|
rport->port_id = -1;
|
|
break;
|
|
case FC_TGTID_BIND_BY_WWNN:
|
|
rport->port_name = -1;
|
|
rport->port_id = -1;
|
|
break;
|
|
case FC_TGTID_BIND_BY_ID:
|
|
rport->node_name = -1;
|
|
rport->port_name = -1;
|
|
break;
|
|
case FC_TGTID_BIND_NONE: /* to keep compiler happy */
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* As this only occurs if the remote port (scsi target)
|
|
* went away and didn't come back - we'll remove
|
|
* all attached scsi devices.
|
|
*/
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
|
|
scsi_target_unblock(&rport->dev);
|
|
fc_queue_work(shost, &rport->stgt_delete_work);
|
|
}
|
|
|
|
/**
|
|
* fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a
|
|
* disconnected SCSI target.
|
|
*
|
|
* @work: rport to terminate io on.
|
|
*
|
|
* Notes: Only requests the failure of the io, not that all are flushed
|
|
* prior to returning.
|
|
**/
|
|
static void
|
|
fc_timeout_fail_rport_io(struct work_struct *work)
|
|
{
|
|
struct fc_rport *rport =
|
|
container_of(work, struct fc_rport, fail_io_work.work);
|
|
struct Scsi_Host *shost = rport_to_shost(rport);
|
|
struct fc_internal *i = to_fc_internal(shost->transportt);
|
|
|
|
if (rport->port_state != FC_PORTSTATE_BLOCKED)
|
|
return;
|
|
|
|
i->f->terminate_rport_io(rport);
|
|
}
|
|
|
|
/**
|
|
* fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
|
|
*
|
|
* @work: remote port to be scanned.
|
|
**/
|
|
static void
|
|
fc_scsi_scan_rport(struct work_struct *work)
|
|
{
|
|
struct fc_rport *rport =
|
|
container_of(work, struct fc_rport, scan_work);
|
|
struct Scsi_Host *shost = rport_to_shost(rport);
|
|
unsigned long flags;
|
|
|
|
if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
|
|
(rport->roles & FC_RPORT_ROLE_FCP_TARGET)) {
|
|
scsi_scan_target(&rport->dev, rport->channel,
|
|
rport->scsi_target_id, SCAN_WILD_CARD, 1);
|
|
}
|
|
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
rport->flags &= ~FC_RPORT_SCAN_PENDING;
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
}
|
|
|
|
|
|
MODULE_AUTHOR("Martin Hicks");
|
|
MODULE_DESCRIPTION("FC Transport Attributes");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(fc_transport_init);
|
|
module_exit(fc_transport_exit);
|