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1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
1666 lines
51 KiB
C
1666 lines
51 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_priv.h"
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#define FC_PRINTK(x, l, f, a...) printk(l "scsi(%d:%d:%d:%d): " f, (x)->host->host_no, (x)->channel, (x)->id, (x)->lun , ##a)
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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 < sizeof(table)/sizeof(table[0]); 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 < sizeof(table)/sizeof(table[0]); 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_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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};
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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 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 < sizeof(table)/sizeof(table[0]); 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 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 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 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_blocked_rport(void *data);
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static void fc_scsi_scan_rport(void *data);
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static void fc_rport_terminate(struct fc_rport *rport);
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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 9
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#define FC_HOST_NUM_ATTRS 15
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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 device *dev)
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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 device *dev)
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{
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struct Scsi_Host *shost = dev_to_shost(dev);
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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(shost) = -1;
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fc_host_port_name(shost) = -1;
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fc_host_supported_classes(shost) = FC_COS_UNSPECIFIED;
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memset(fc_host_supported_fc4s(shost), 0,
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sizeof(fc_host_supported_fc4s(shost)));
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memset(fc_host_symbolic_name(shost), 0,
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sizeof(fc_host_symbolic_name(shost)));
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fc_host_supported_speeds(shost) = FC_PORTSPEED_UNKNOWN;
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fc_host_maxframe_size(shost) = -1;
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memset(fc_host_serial_number(shost), 0,
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sizeof(fc_host_serial_number(shost)));
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fc_host_port_id(shost) = -1;
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fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
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fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
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memset(fc_host_active_fc4s(shost), 0,
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sizeof(fc_host_active_fc4s(shost)));
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fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
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fc_host_fabric_name(shost) = -1;
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fc_host_tgtid_bind_type(shost) = FC_TGTID_BIND_BY_WWPN;
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INIT_LIST_HEAD(&fc_host_rports(shost));
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INIT_LIST_HEAD(&fc_host_rport_bindings(shost));
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fc_host_next_rport_number(shost) = 0;
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fc_host_next_target_id(shost) = 0;
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return 0;
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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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* 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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/*
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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 = SCSI_DEVICE_BLOCK_MAX_TIMEOUT;
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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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static __init int fc_transport_init(void)
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{
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int error = transport_class_register(&fc_host_class);
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if (error)
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return error;
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error = transport_class_register(&fc_rport_class);
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if (error)
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return error;
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return transport_class_register(&fc_transport_class);
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}
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static void __exit fc_transport_exit(void)
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{
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transport_class_unregister(&fc_transport_class);
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transport_class_unregister(&fc_rport_class);
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transport_class_unregister(&fc_host_class);
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}
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/*
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* FC Remote Port Attribute Management
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*/
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#define fc_rport_show_function(field, format_string, sz, cast) \
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static ssize_t \
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show_fc_rport_##field (struct class_device *cdev, char *buf) \
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{ \
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struct fc_rport *rport = transport_class_to_rport(cdev); \
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struct Scsi_Host *shost = rport_to_shost(rport); \
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struct fc_internal *i = to_fc_internal(shost->transportt); \
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if (i->f->get_rport_##field) \
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i->f->get_rport_##field(rport); \
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return snprintf(buf, sz, format_string, cast rport->field); \
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}
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#define fc_rport_store_function(field) \
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static ssize_t \
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store_fc_rport_##field(struct class_device *cdev, const char *buf, \
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size_t count) \
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{ \
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int val; \
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struct fc_rport *rport = transport_class_to_rport(cdev); \
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struct Scsi_Host *shost = rport_to_shost(rport); \
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struct fc_internal *i = to_fc_internal(shost->transportt); \
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val = simple_strtoul(buf, NULL, 0); \
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i->f->set_rport_##field(rport, val); \
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return count; \
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}
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#define fc_rport_rd_attr(field, format_string, sz) \
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fc_rport_show_function(field, format_string, sz, ) \
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static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
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show_fc_rport_##field, NULL)
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#define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
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fc_rport_show_function(field, format_string, sz, (cast)) \
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static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
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show_fc_rport_##field, NULL)
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#define fc_rport_rw_attr(field, format_string, sz) \
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fc_rport_show_function(field, format_string, sz, ) \
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fc_rport_store_function(field) \
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static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
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show_fc_rport_##field, \
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store_fc_rport_##field)
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|
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#define fc_private_rport_show_function(field, format_string, sz, cast) \
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static ssize_t \
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show_fc_rport_##field (struct class_device *cdev, char *buf) \
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{ \
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struct fc_rport *rport = transport_class_to_rport(cdev); \
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return snprintf(buf, sz, format_string, cast rport->field); \
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}
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#define fc_private_rport_rd_attr(field, format_string, sz) \
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fc_private_rport_show_function(field, format_string, sz, ) \
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static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
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show_fc_rport_##field, NULL)
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#define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
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fc_private_rport_show_function(field, format_string, sz, (cast)) \
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static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
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show_fc_rport_##field, NULL)
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|
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#define fc_private_rport_rd_enum_attr(title, maxlen) \
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static ssize_t \
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|
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++
|
|
|
|
|
|
/* 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 */
|
|
|
|
fc_rport_rw_attr(dev_loss_tmo, "%d\n", 20);
|
|
|
|
|
|
/* 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);
|
|
|
|
|
|
|
|
/*
|
|
* FC SCSI Target Attribute Management
|
|
*/
|
|
|
|
/*
|
|
* Note: in the target show function we recognize when the remote
|
|
* port is in the heirarchy 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); \
|
|
\
|
|
val = simple_strtoul(buf, NULL, 0); \
|
|
i->f->set_host_##field(shost, val); \
|
|
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(symbolic_name, "%s\n", (FC_SYMBOLIC_NAME_SIZE +1));
|
|
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);
|
|
|
|
|
|
/* 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);
|
|
}
|
|
|
|
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, *next_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);
|
|
list_for_each_entry_safe(rport, next_rport,
|
|
&fc_host_rport_bindings(shost), peers)
|
|
fc_rport_terminate(rport);
|
|
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);
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
struct scsi_transport_template *
|
|
fc_attach_transport(struct fc_function_template *ft)
|
|
{
|
|
struct fc_internal *i = kmalloc(sizeof(struct fc_internal),
|
|
GFP_KERNEL);
|
|
int count;
|
|
|
|
if (unlikely(!i))
|
|
return NULL;
|
|
|
|
memset(i, 0, sizeof(struct fc_internal));
|
|
|
|
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;
|
|
|
|
/*
|
|
* 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(supported_classes);
|
|
SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
|
|
SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
|
|
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);
|
|
|
|
/* Transport-managed attributes */
|
|
SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
|
|
|
|
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);
|
|
|
|
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_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;
|
|
|
|
/* Remove any remote ports */
|
|
list_for_each_entry_safe(rport, next_rport,
|
|
&fc_host_rports(shost), peers)
|
|
fc_rport_terminate(rport);
|
|
list_for_each_entry_safe(rport, next_rport,
|
|
&fc_host_rport_bindings(shost), peers)
|
|
fc_rport_terminate(rport);
|
|
}
|
|
EXPORT_SYMBOL(fc_remove_host);
|
|
|
|
/**
|
|
* 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 =
|
|
(struct fc_host_attrs *)shost->shost_data;
|
|
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 = kmalloc(size, GFP_KERNEL);
|
|
if (unlikely(!rport)) {
|
|
printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__);
|
|
return NULL;
|
|
}
|
|
memset(rport, 0, size);
|
|
|
|
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;
|
|
|
|
INIT_WORK(&rport->dev_loss_work, fc_timeout_blocked_rport, rport);
|
|
INIT_WORK(&rport->scan_work, fc_scsi_scan_rport, rport);
|
|
|
|
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(shost));
|
|
get_device(&shost->shost_gendev);
|
|
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
|
|
dev = &rport->dev;
|
|
device_initialize(dev);
|
|
dev->parent = get_device(&shost->shost_gendev);
|
|
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 */
|
|
scsi_queue_work(shost, &rport->scan_work);
|
|
|
|
return rport;
|
|
|
|
delete_rport:
|
|
transport_destroy_device(dev);
|
|
put_device(dev->parent);
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
list_del(&rport->peers);
|
|
put_device(&shost->shost_gendev);
|
|
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_rport *rport;
|
|
unsigned long flags;
|
|
int match = 0;
|
|
|
|
if (likely((ids->roles & FC_RPORT_ROLE_FCP_TARGET) &&
|
|
(fc_host_tgtid_bind_type(shost) != FC_TGTID_BIND_NONE))) {
|
|
|
|
/* search for a matching consistent binding */
|
|
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
|
|
list_for_each_entry(rport, &fc_host_rport_bindings(shost),
|
|
peers) {
|
|
if (rport->channel != channel)
|
|
continue;
|
|
|
|
switch (fc_host_tgtid_bind_type(shost)) {
|
|
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(shost));
|
|
break;
|
|
}
|
|
}
|
|
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
|
|
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 (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
|
|
/* initiate a scan of the target */
|
|
scsi_queue_work(shost, &rport->scan_work);
|
|
|
|
return rport;
|
|
}
|
|
}
|
|
|
|
/* 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_rport_tgt_remove - Removes the scsi target on the remote port
|
|
* @rport: The remote port to be operated on
|
|
*/
|
|
static void
|
|
fc_rport_tgt_remove(struct fc_rport *rport)
|
|
{
|
|
struct Scsi_Host *shost = rport_to_shost(rport);
|
|
|
|
scsi_target_unblock(&rport->dev);
|
|
|
|
/* Stop anything on the workq */
|
|
if (!cancel_delayed_work(&rport->dev_loss_work))
|
|
flush_scheduled_work();
|
|
scsi_flush_work(shost);
|
|
|
|
scsi_remove_target(&rport->dev);
|
|
}
|
|
|
|
/*
|
|
* fc_rport_terminate - this routine tears down and deallocates a remote port.
|
|
* @rport: The remote port to be terminated
|
|
*
|
|
* Notes:
|
|
* This routine assumes no locks are held on entry.
|
|
*/
|
|
static void
|
|
fc_rport_terminate(struct fc_rport *rport)
|
|
{
|
|
struct Scsi_Host *shost = rport_to_shost(rport);
|
|
struct device *dev = &rport->dev;
|
|
unsigned long flags;
|
|
|
|
fc_rport_tgt_remove(rport);
|
|
|
|
transport_remove_device(dev);
|
|
device_del(dev);
|
|
transport_destroy_device(dev);
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
list_del(&rport->peers);
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
put_device(&shost->shost_gendev);
|
|
}
|
|
|
|
/**
|
|
* 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. This is done so that target id
|
|
* mappings (managed via the remote port structures), are always visible
|
|
* as long as the mapping is valid, regardless of port state,
|
|
*
|
|
* 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 structure will be
|
|
* marked as Not Present, but will remain as long as there is a valid
|
|
* SCSI target id mapping associated with the port structure. Validity
|
|
* is determined by the binding type. If binding by wwpn, then the port
|
|
* structure is always valid and will not be deallocated until the host
|
|
* is removed. If binding by wwnn, then the port structure is valid
|
|
* until another port with the same node name is found in the topology.
|
|
* If binding by port id (fc address), then the port structure is valid
|
|
* valid until another port with the same address is identified.
|
|
*
|
|
* Called from interrupt or normal process context.
|
|
*
|
|
* 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);
|
|
unsigned long flags;
|
|
|
|
/* If no scsi target id mapping or consistent binding type, delete it */
|
|
if ((rport->scsi_target_id == -1) ||
|
|
(fc_host_tgtid_bind_type(shost) == FC_TGTID_BIND_NONE)) {
|
|
fc_rport_terminate(rport);
|
|
return;
|
|
}
|
|
|
|
fc_rport_tgt_remove(rport);
|
|
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
list_move_tail(&rport->peers, &fc_host_rport_bindings(shost));
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
|
|
/*
|
|
* 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(shost)) {
|
|
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;
|
|
}
|
|
}
|
|
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 =
|
|
(struct fc_host_attrs *)shost->shost_data;
|
|
unsigned long flags;
|
|
int create = 0;
|
|
|
|
rport->roles = roles;
|
|
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
if ((rport->scsi_target_id == -1) &&
|
|
(rport->roles & FC_RPORT_ROLE_FCP_TARGET)) {
|
|
rport->scsi_target_id = fc_host->next_target_id++;
|
|
create = 1;
|
|
}
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
|
|
if (create)
|
|
/* initiate a scan of the target */
|
|
scsi_queue_work(shost, &rport->scan_work);
|
|
}
|
|
EXPORT_SYMBOL(fc_remote_port_rolechg);
|
|
|
|
/**
|
|
* fc_timeout_blocked_rport - Timeout handler for blocked remote port
|
|
* that fails to return in the alloted time.
|
|
* @data: scsi target that failed to reappear in the alloted time.
|
|
**/
|
|
static void
|
|
fc_timeout_blocked_rport(void *data)
|
|
{
|
|
struct fc_rport *rport = (struct fc_rport *)data;
|
|
|
|
rport->port_state = FC_PORTSTATE_OFFLINE;
|
|
|
|
dev_printk(KERN_ERR, &rport->dev,
|
|
"blocked FC remote port time out: removing target\n");
|
|
|
|
/*
|
|
* As this only occurs if the remote port (scsi target)
|
|
* went away and didn't come back - we'll remove
|
|
* all attached scsi devices.
|
|
*/
|
|
scsi_target_unblock(&rport->dev);
|
|
scsi_remove_target(&rport->dev);
|
|
}
|
|
|
|
/**
|
|
* fc_remote_port_block - temporarily block any scsi traffic to a remote port.
|
|
* @rport: remote port to be blocked.
|
|
*
|
|
* scsi lldd's with a FC transport call this routine to temporarily stop
|
|
* all scsi traffic to a remote port. If the port is not a SCSI target,
|
|
* no action is taken. If the port is a SCSI target, all attached devices
|
|
* are placed into a SDEV_BLOCK state and a timer is started. The timer is
|
|
* represents the maximum amount of time the port may be blocked. If the
|
|
* timer expires, the port is considered non-existent and the attached
|
|
* scsi devices will be removed.
|
|
*
|
|
* Called from interrupt or normal process context.
|
|
*
|
|
* Returns zero if successful or error if not
|
|
*
|
|
* Notes:
|
|
* This routine assumes no locks are held on entry.
|
|
*
|
|
* The timeout and timer types are extracted from the fc transport
|
|
* attributes from the caller's rport pointer.
|
|
**/
|
|
int
|
|
fc_remote_port_block(struct fc_rport *rport)
|
|
{
|
|
int timeout = rport->dev_loss_tmo;
|
|
struct work_struct *work = &rport->dev_loss_work;
|
|
|
|
if (timeout < 0 || timeout > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
|
|
return -EINVAL;
|
|
|
|
scsi_target_block(&rport->dev);
|
|
|
|
/* cap the length the devices can be blocked */
|
|
schedule_delayed_work(work, timeout * HZ);
|
|
|
|
rport->port_state = FC_PORTSTATE_BLOCKED;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(fc_remote_port_block);
|
|
|
|
/**
|
|
* fc_remote_port_unblock - restart any blocked scsi traffic to a remote port.
|
|
* @rport: remote port to be unblocked.
|
|
*
|
|
* scsi lld's with a FC transport call this routine to restart IO to all
|
|
* devices associated with the caller's scsi target following a fc_target_block
|
|
* request. Called from interrupt or normal process context.
|
|
*
|
|
* Notes:
|
|
* This routine assumes no locks are held on entry.
|
|
**/
|
|
void
|
|
fc_remote_port_unblock(struct fc_rport *rport)
|
|
{
|
|
struct work_struct *work = &rport->dev_loss_work;
|
|
struct Scsi_Host *shost = rport_to_shost(rport);
|
|
|
|
/*
|
|
* Stop the target timer first. Take no action on the del_timer
|
|
* failure as the state machine state change will validate the
|
|
* transaction.
|
|
*/
|
|
if (!cancel_delayed_work(work))
|
|
flush_scheduled_work();
|
|
|
|
if (rport->port_state == FC_PORTSTATE_OFFLINE)
|
|
/*
|
|
* initiate a scan of the target as the target has
|
|
* been torn down.
|
|
*/
|
|
scsi_queue_work(shost, &rport->scan_work);
|
|
else
|
|
scsi_target_unblock(&rport->dev);
|
|
|
|
rport->port_state = FC_PORTSTATE_ONLINE;
|
|
}
|
|
EXPORT_SYMBOL(fc_remote_port_unblock);
|
|
|
|
/**
|
|
* fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
|
|
* @data: remote port to be scanned.
|
|
**/
|
|
static void
|
|
fc_scsi_scan_rport(void *data)
|
|
{
|
|
struct fc_rport *rport = (struct fc_rport *)data;
|
|
|
|
scsi_scan_target(&rport->dev, rport->channel, rport->scsi_target_id,
|
|
SCAN_WILD_CARD, 1);
|
|
}
|
|
|
|
|
|
MODULE_AUTHOR("Martin Hicks");
|
|
MODULE_DESCRIPTION("FC Transport Attributes");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(fc_transport_init);
|
|
module_exit(fc_transport_exit);
|