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4359 lines
129 KiB
4359 lines
129 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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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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* Copyright (C) 2004-2007 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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* Add vports, etc |
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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 <linux/slab.h> |
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#include <linux/delay.h> |
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#include <linux/kernel.h> |
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#include <linux/bsg-lib.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 <net/netlink.h> |
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#include <scsi/scsi_netlink_fc.h> |
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#include <scsi/scsi_bsg_fc.h> |
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#include <uapi/scsi/fc/fc_els.h> |
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#include "scsi_priv.h" |
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|
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static int fc_queue_work(struct Scsi_Host *, struct work_struct *); |
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static void fc_vport_sched_delete(struct work_struct *work); |
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static int fc_vport_setup(struct Scsi_Host *shost, int channel, |
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struct device *pdev, struct fc_vport_identifiers *ids, |
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struct fc_vport **vport); |
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static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *); |
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static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *); |
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static void fc_bsg_remove(struct request_queue *); |
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static void fc_bsg_goose_queue(struct fc_rport *); |
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static void fc_li_stats_update(struct fc_fn_li_desc *li_desc, |
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struct fc_fpin_stats *stats); |
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static void fc_delivery_stats_update(u32 reason_code, |
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struct fc_fpin_stats *stats); |
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static void fc_cn_stats_update(u16 event_type, struct fc_fpin_stats *stats); |
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|
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/* |
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* Module Parameters |
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*/ |
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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, uint, 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 if" |
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" fast_io_fail_tmo is not set."); |
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|
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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_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ |
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struct device_attribute device_attr_##_prefix##_##_name = \ |
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__ATTR(_name,_mode,_show,_store) |
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|
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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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|
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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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|
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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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{ FC_PORTTYPE_NPIV, "NPIV VPORT" }, |
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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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|
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/* Reuse fc_port_type enum function for vport_type */ |
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#define get_fc_vport_type_name get_fc_port_type_name |
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|
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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_LINK_FPIN, "link_FPIN" }, |
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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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|
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|
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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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int matchlen; |
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} fc_port_state_names[] = { |
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{ FC_PORTSTATE_UNKNOWN, "Unknown", 7}, |
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{ FC_PORTSTATE_NOTPRESENT, "Not Present", 11 }, |
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{ FC_PORTSTATE_ONLINE, "Online", 6 }, |
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{ FC_PORTSTATE_OFFLINE, "Offline", 7 }, |
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{ FC_PORTSTATE_BLOCKED, "Blocked", 7 }, |
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{ FC_PORTSTATE_BYPASSED, "Bypassed", 8 }, |
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{ FC_PORTSTATE_DIAGNOSTICS, "Diagnostics", 11 }, |
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{ FC_PORTSTATE_LINKDOWN, "Linkdown", 8 }, |
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{ FC_PORTSTATE_ERROR, "Error", 5 }, |
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{ FC_PORTSTATE_LOOPBACK, "Loopback", 8 }, |
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{ FC_PORTSTATE_DELETED, "Deleted", 7 }, |
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{ FC_PORTSTATE_MARGINAL, "Marginal", 8 }, |
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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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fc_enum_name_match(port_state, fc_port_state, fc_port_state_names) |
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#define FC_PORTSTATE_MAX_NAMELEN 20 |
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|
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|
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/* Convert fc_vport_state values to ascii string name */ |
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static struct { |
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enum fc_vport_state value; |
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char *name; |
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} fc_vport_state_names[] = { |
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{ FC_VPORT_UNKNOWN, "Unknown" }, |
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{ FC_VPORT_ACTIVE, "Active" }, |
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{ FC_VPORT_DISABLED, "Disabled" }, |
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{ FC_VPORT_LINKDOWN, "Linkdown" }, |
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{ FC_VPORT_INITIALIZING, "Initializing" }, |
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{ FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" }, |
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{ FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" }, |
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{ FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" }, |
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{ FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" }, |
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{ FC_VPORT_FAILED, "VPort Failed" }, |
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}; |
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fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names) |
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#define FC_VPORTSTATE_MAX_NAMELEN 24 |
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|
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/* Reuse fc_vport_state enum function for vport_last_state */ |
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#define get_fc_vport_last_state_name get_fc_vport_state_name |
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|
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|
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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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|
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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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|
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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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|
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|
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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_8GBIT, "8 Gbit" }, |
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{ FC_PORTSPEED_16GBIT, "16 Gbit" }, |
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{ FC_PORTSPEED_32GBIT, "32 Gbit" }, |
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{ FC_PORTSPEED_20GBIT, "20 Gbit" }, |
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{ FC_PORTSPEED_40GBIT, "40 Gbit" }, |
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{ FC_PORTSPEED_50GBIT, "50 Gbit" }, |
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{ FC_PORTSPEED_100GBIT, "100 Gbit" }, |
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{ FC_PORTSPEED_25GBIT, "25 Gbit" }, |
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{ FC_PORTSPEED_64GBIT, "64 Gbit" }, |
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{ FC_PORTSPEED_128GBIT, "128 Gbit" }, |
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{ FC_PORTSPEED_256GBIT, "256 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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|
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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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|
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/* Convert FC_PORT_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_port_role_names[] = { |
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{ FC_PORT_ROLE_FCP_TARGET, "FCP Target" }, |
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{ FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, |
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{ FC_PORT_ROLE_IP_PORT, "IP Port" }, |
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{ FC_PORT_ROLE_FCP_DUMMY_INITIATOR, "FCP Dummy Initiator" }, |
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{ FC_PORT_ROLE_NVME_INITIATOR, "NVMe Initiator" }, |
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{ FC_PORT_ROLE_NVME_TARGET, "NVMe Target" }, |
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{ FC_PORT_ROLE_NVME_DISCOVERY, "NVMe Discovery" }, |
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}; |
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fc_bitfield_name_search(port_roles, fc_port_role_names) |
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|
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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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|
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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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/* |
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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_VPORT_NUM_ATTRS 9 |
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#define FC_HOST_NUM_ATTRS 29 |
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|
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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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/* |
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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 device_attribute private_starget_attrs[ |
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FC_STARGET_NUM_ATTRS]; |
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struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; |
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|
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struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; |
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struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; |
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|
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struct transport_container rport_attr_cont; |
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struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; |
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struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; |
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|
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struct transport_container vport_attr_cont; |
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struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS]; |
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struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1]; |
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}; |
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|
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#define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) |
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|
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static int fc_target_setup(struct transport_container *tc, struct device *dev, |
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struct 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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/* |
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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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|
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return 0; |
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} |
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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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|
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static int fc_host_setup(struct transport_container *tc, struct device *dev, |
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struct 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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fc_host->max_npiv_vports = 0; |
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memset(fc_host->serial_number, 0, |
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sizeof(fc_host->serial_number)); |
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memset(fc_host->manufacturer, 0, |
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sizeof(fc_host->manufacturer)); |
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memset(fc_host->model, 0, |
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sizeof(fc_host->model)); |
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memset(fc_host->model_description, 0, |
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sizeof(fc_host->model_description)); |
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memset(fc_host->hardware_version, 0, |
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sizeof(fc_host->hardware_version)); |
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memset(fc_host->driver_version, 0, |
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sizeof(fc_host->driver_version)); |
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memset(fc_host->firmware_version, 0, |
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sizeof(fc_host->firmware_version)); |
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memset(fc_host->optionrom_version, 0, |
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sizeof(fc_host->optionrom_version)); |
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|
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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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memset(&fc_host->fpin_stats, 0, sizeof(fc_host->fpin_stats)); |
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|
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fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; |
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|
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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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INIT_LIST_HEAD(&fc_host->vports); |
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fc_host->next_rport_number = 0; |
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fc_host->next_target_id = 0; |
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fc_host->next_vport_number = 0; |
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fc_host->npiv_vports_inuse = 0; |
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|
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snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name), |
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"fc_wq_%d", shost->host_no); |
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fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name); |
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if (!fc_host->work_q) |
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return -ENOMEM; |
|
|
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fc_host->dev_loss_tmo = fc_dev_loss_tmo; |
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snprintf(fc_host->devloss_work_q_name, |
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sizeof(fc_host->devloss_work_q_name), |
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"fc_dl_%d", shost->host_no); |
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fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0, |
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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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fc_bsg_hostadd(shost, fc_host); |
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/* ignore any bsg add error - we just can't do sgio */ |
|
|
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return 0; |
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} |
|
|
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static int fc_host_remove(struct transport_container *tc, struct device *dev, |
|
struct device *cdev) |
|
{ |
|
struct Scsi_Host *shost = dev_to_shost(dev); |
|
struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
|
|
|
fc_bsg_remove(fc_host->rqst_q); |
|
return 0; |
|
} |
|
|
|
static DECLARE_TRANSPORT_CLASS(fc_host_class, |
|
"fc_host", |
|
fc_host_setup, |
|
fc_host_remove, |
|
NULL); |
|
|
|
/* |
|
* Setup and Remove actions for remote ports are handled |
|
* in the service functions below. |
|
*/ |
|
static DECLARE_TRANSPORT_CLASS(fc_rport_class, |
|
"fc_remote_ports", |
|
NULL, |
|
NULL, |
|
NULL); |
|
|
|
/* |
|
* Setup and Remove actions for virtual ports are handled |
|
* in the service functions below. |
|
*/ |
|
static DECLARE_TRANSPORT_CLASS(fc_vport_class, |
|
"fc_vports", |
|
NULL, |
|
NULL, |
|
NULL); |
|
|
|
/* |
|
* Netlink Infrastructure |
|
*/ |
|
|
|
static atomic_t fc_event_seq; |
|
|
|
/** |
|
* fc_get_event_number - Obtain the next sequential FC event number |
|
* |
|
* Notes: |
|
* We could have inlined this, but it would have required fc_event_seq to |
|
* be exposed. For now, live with the subroutine call. |
|
* Atomic used to avoid lock/unlock... |
|
*/ |
|
u32 |
|
fc_get_event_number(void) |
|
{ |
|
return atomic_add_return(1, &fc_event_seq); |
|
} |
|
EXPORT_SYMBOL(fc_get_event_number); |
|
|
|
/** |
|
* fc_host_post_fc_event - routine to do the work of posting an event |
|
* on an fc_host. |
|
* @shost: host the event occurred on |
|
* @event_number: fc event number obtained from get_fc_event_number() |
|
* @event_code: fc_host event being posted |
|
* @data_len: amount, in bytes, of event data |
|
* @data_buf: pointer to event data |
|
* @vendor_id: value for Vendor id |
|
* |
|
* Notes: |
|
* This routine assumes no locks are held on entry. |
|
*/ |
|
void |
|
fc_host_post_fc_event(struct Scsi_Host *shost, u32 event_number, |
|
enum fc_host_event_code event_code, |
|
u32 data_len, char *data_buf, u64 vendor_id) |
|
{ |
|
struct sk_buff *skb; |
|
struct nlmsghdr *nlh; |
|
struct fc_nl_event *event; |
|
const char *name; |
|
u32 len; |
|
int err; |
|
|
|
if (!data_buf || data_len < 4) |
|
data_len = 0; |
|
|
|
if (!scsi_nl_sock) { |
|
err = -ENOENT; |
|
goto send_fail; |
|
} |
|
|
|
len = FC_NL_MSGALIGN(sizeof(*event) + data_len); |
|
|
|
skb = nlmsg_new(len, GFP_KERNEL); |
|
if (!skb) { |
|
err = -ENOBUFS; |
|
goto send_fail; |
|
} |
|
|
|
nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 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 = ktime_get_real_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 = event_code; |
|
if (data_len) |
|
memcpy(&event->event_data, data_buf, data_len); |
|
|
|
nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, |
|
GFP_KERNEL); |
|
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", |
|
__func__, shost->host_no, |
|
(name) ? name : "<unknown>", |
|
(data_len) ? *((u32 *)data_buf) : 0xFFFFFFFF, err); |
|
return; |
|
} |
|
EXPORT_SYMBOL(fc_host_post_fc_event); |
|
|
|
/** |
|
* fc_host_post_event - called to post an even on an fc_host. |
|
* @shost: host the event occurred on |
|
* @event_number: fc event number obtained from get_fc_event_number() |
|
* @event_code: fc_host event being posted |
|
* @event_data: 32bits of data for the event being posted |
|
* |
|
* Notes: |
|
* This routine assumes no locks are held on entry. |
|
*/ |
|
void |
|
fc_host_post_event(struct Scsi_Host *shost, u32 event_number, |
|
enum fc_host_event_code event_code, u32 event_data) |
|
{ |
|
fc_host_post_fc_event(shost, event_number, event_code, |
|
(u32)sizeof(u32), (char *)&event_data, 0); |
|
} |
|
EXPORT_SYMBOL(fc_host_post_event); |
|
|
|
|
|
/** |
|
* fc_host_post_vendor_event - called to post a vendor unique event |
|
* on an 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 |
|
* @vendor_id: Vendor id |
|
* |
|
* 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) |
|
{ |
|
fc_host_post_fc_event(shost, event_number, FCH_EVT_VENDOR_UNIQUE, |
|
data_len, data_buf, vendor_id); |
|
} |
|
EXPORT_SYMBOL(fc_host_post_vendor_event); |
|
|
|
/** |
|
* fc_find_rport_by_wwpn - find the fc_rport pointer for a given wwpn |
|
* @shost: host the fc_rport is associated with |
|
* @wwpn: wwpn of the fc_rport device |
|
* |
|
* Notes: |
|
* This routine assumes no locks are held on entry. |
|
*/ |
|
struct fc_rport * |
|
fc_find_rport_by_wwpn(struct Scsi_Host *shost, u64 wwpn) |
|
{ |
|
struct fc_rport *rport; |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(shost->host_lock, flags); |
|
|
|
list_for_each_entry(rport, &fc_host_rports(shost), peers) { |
|
if (rport->port_state != FC_PORTSTATE_ONLINE) |
|
continue; |
|
|
|
if (rport->port_name == wwpn) { |
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
return rport; |
|
} |
|
} |
|
|
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
return NULL; |
|
} |
|
EXPORT_SYMBOL(fc_find_rport_by_wwpn); |
|
|
|
static void |
|
fc_li_stats_update(struct fc_fn_li_desc *li_desc, |
|
struct fc_fpin_stats *stats) |
|
{ |
|
stats->li += be32_to_cpu(li_desc->event_count); |
|
switch (be16_to_cpu(li_desc->event_type)) { |
|
case FPIN_LI_UNKNOWN: |
|
stats->li_failure_unknown += |
|
be32_to_cpu(li_desc->event_count); |
|
break; |
|
case FPIN_LI_LINK_FAILURE: |
|
stats->li_link_failure_count += |
|
be32_to_cpu(li_desc->event_count); |
|
break; |
|
case FPIN_LI_LOSS_OF_SYNC: |
|
stats->li_loss_of_sync_count += |
|
be32_to_cpu(li_desc->event_count); |
|
break; |
|
case FPIN_LI_LOSS_OF_SIG: |
|
stats->li_loss_of_signals_count += |
|
be32_to_cpu(li_desc->event_count); |
|
break; |
|
case FPIN_LI_PRIM_SEQ_ERR: |
|
stats->li_prim_seq_err_count += |
|
be32_to_cpu(li_desc->event_count); |
|
break; |
|
case FPIN_LI_INVALID_TX_WD: |
|
stats->li_invalid_tx_word_count += |
|
be32_to_cpu(li_desc->event_count); |
|
break; |
|
case FPIN_LI_INVALID_CRC: |
|
stats->li_invalid_crc_count += |
|
be32_to_cpu(li_desc->event_count); |
|
break; |
|
case FPIN_LI_DEVICE_SPEC: |
|
stats->li_device_specific += |
|
be32_to_cpu(li_desc->event_count); |
|
break; |
|
} |
|
} |
|
|
|
static void |
|
fc_delivery_stats_update(u32 reason_code, struct fc_fpin_stats *stats) |
|
{ |
|
stats->dn++; |
|
switch (reason_code) { |
|
case FPIN_DELI_UNKNOWN: |
|
stats->dn_unknown++; |
|
break; |
|
case FPIN_DELI_TIMEOUT: |
|
stats->dn_timeout++; |
|
break; |
|
case FPIN_DELI_UNABLE_TO_ROUTE: |
|
stats->dn_unable_to_route++; |
|
break; |
|
case FPIN_DELI_DEVICE_SPEC: |
|
stats->dn_device_specific++; |
|
break; |
|
} |
|
} |
|
|
|
static void |
|
fc_cn_stats_update(u16 event_type, struct fc_fpin_stats *stats) |
|
{ |
|
stats->cn++; |
|
switch (event_type) { |
|
case FPIN_CONGN_CLEAR: |
|
stats->cn_clear++; |
|
break; |
|
case FPIN_CONGN_LOST_CREDIT: |
|
stats->cn_lost_credit++; |
|
break; |
|
case FPIN_CONGN_CREDIT_STALL: |
|
stats->cn_credit_stall++; |
|
break; |
|
case FPIN_CONGN_OVERSUBSCRIPTION: |
|
stats->cn_oversubscription++; |
|
break; |
|
case FPIN_CONGN_DEVICE_SPEC: |
|
stats->cn_device_specific++; |
|
} |
|
} |
|
|
|
/* |
|
* fc_fpin_li_stats_update - routine to update Link Integrity |
|
* event statistics. |
|
* @shost: host the FPIN was received on |
|
* @tlv: pointer to link integrity descriptor |
|
* |
|
*/ |
|
static void |
|
fc_fpin_li_stats_update(struct Scsi_Host *shost, struct fc_tlv_desc *tlv) |
|
{ |
|
u8 i; |
|
struct fc_rport *rport = NULL; |
|
struct fc_rport *attach_rport = NULL; |
|
struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
|
struct fc_fn_li_desc *li_desc = (struct fc_fn_li_desc *)tlv; |
|
u64 wwpn; |
|
|
|
rport = fc_find_rport_by_wwpn(shost, |
|
be64_to_cpu(li_desc->attached_wwpn)); |
|
if (rport && |
|
(rport->roles & FC_PORT_ROLE_FCP_TARGET || |
|
rport->roles & FC_PORT_ROLE_NVME_TARGET)) { |
|
attach_rport = rport; |
|
fc_li_stats_update(li_desc, &attach_rport->fpin_stats); |
|
} |
|
|
|
if (be32_to_cpu(li_desc->pname_count) > 0) { |
|
for (i = 0; |
|
i < be32_to_cpu(li_desc->pname_count); |
|
i++) { |
|
wwpn = be64_to_cpu(li_desc->pname_list[i]); |
|
rport = fc_find_rport_by_wwpn(shost, wwpn); |
|
if (rport && |
|
(rport->roles & FC_PORT_ROLE_FCP_TARGET || |
|
rport->roles & FC_PORT_ROLE_NVME_TARGET)) { |
|
if (rport == attach_rport) |
|
continue; |
|
fc_li_stats_update(li_desc, |
|
&rport->fpin_stats); |
|
} |
|
} |
|
} |
|
|
|
if (fc_host->port_name == be64_to_cpu(li_desc->attached_wwpn)) |
|
fc_li_stats_update(li_desc, &fc_host->fpin_stats); |
|
} |
|
|
|
/* |
|
* fc_fpin_delivery_stats_update - routine to update Delivery Notification |
|
* event statistics. |
|
* @shost: host the FPIN was received on |
|
* @tlv: pointer to delivery descriptor |
|
* |
|
*/ |
|
static void |
|
fc_fpin_delivery_stats_update(struct Scsi_Host *shost, |
|
struct fc_tlv_desc *tlv) |
|
{ |
|
struct fc_rport *rport = NULL; |
|
struct fc_rport *attach_rport = NULL; |
|
struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
|
struct fc_fn_deli_desc *dn_desc = (struct fc_fn_deli_desc *)tlv; |
|
u32 reason_code = be32_to_cpu(dn_desc->deli_reason_code); |
|
|
|
rport = fc_find_rport_by_wwpn(shost, |
|
be64_to_cpu(dn_desc->attached_wwpn)); |
|
if (rport && |
|
(rport->roles & FC_PORT_ROLE_FCP_TARGET || |
|
rport->roles & FC_PORT_ROLE_NVME_TARGET)) { |
|
attach_rport = rport; |
|
fc_delivery_stats_update(reason_code, |
|
&attach_rport->fpin_stats); |
|
} |
|
|
|
if (fc_host->port_name == be64_to_cpu(dn_desc->attached_wwpn)) |
|
fc_delivery_stats_update(reason_code, &fc_host->fpin_stats); |
|
} |
|
|
|
/* |
|
* fc_fpin_peer_congn_stats_update - routine to update Peer Congestion |
|
* event statistics. |
|
* @shost: host the FPIN was received on |
|
* @tlv: pointer to peer congestion descriptor |
|
* |
|
*/ |
|
static void |
|
fc_fpin_peer_congn_stats_update(struct Scsi_Host *shost, |
|
struct fc_tlv_desc *tlv) |
|
{ |
|
u8 i; |
|
struct fc_rport *rport = NULL; |
|
struct fc_rport *attach_rport = NULL; |
|
struct fc_fn_peer_congn_desc *pc_desc = |
|
(struct fc_fn_peer_congn_desc *)tlv; |
|
u16 event_type = be16_to_cpu(pc_desc->event_type); |
|
u64 wwpn; |
|
|
|
rport = fc_find_rport_by_wwpn(shost, |
|
be64_to_cpu(pc_desc->attached_wwpn)); |
|
if (rport && |
|
(rport->roles & FC_PORT_ROLE_FCP_TARGET || |
|
rport->roles & FC_PORT_ROLE_NVME_TARGET)) { |
|
attach_rport = rport; |
|
fc_cn_stats_update(event_type, &attach_rport->fpin_stats); |
|
} |
|
|
|
if (be32_to_cpu(pc_desc->pname_count) > 0) { |
|
for (i = 0; |
|
i < be32_to_cpu(pc_desc->pname_count); |
|
i++) { |
|
wwpn = be64_to_cpu(pc_desc->pname_list[i]); |
|
rport = fc_find_rport_by_wwpn(shost, wwpn); |
|
if (rport && |
|
(rport->roles & FC_PORT_ROLE_FCP_TARGET || |
|
rport->roles & FC_PORT_ROLE_NVME_TARGET)) { |
|
if (rport == attach_rport) |
|
continue; |
|
fc_cn_stats_update(event_type, |
|
&rport->fpin_stats); |
|
} |
|
} |
|
} |
|
} |
|
|
|
/* |
|
* fc_fpin_congn_stats_update - routine to update Congestion |
|
* event statistics. |
|
* @shost: host the FPIN was received on |
|
* @tlv: pointer to congestion descriptor |
|
* |
|
*/ |
|
static void |
|
fc_fpin_congn_stats_update(struct Scsi_Host *shost, |
|
struct fc_tlv_desc *tlv) |
|
{ |
|
struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
|
struct fc_fn_congn_desc *congn = (struct fc_fn_congn_desc *)tlv; |
|
|
|
fc_cn_stats_update(be16_to_cpu(congn->event_type), |
|
&fc_host->fpin_stats); |
|
} |
|
|
|
/** |
|
* fc_host_fpin_rcv - routine to process a received FPIN. |
|
* @shost: host the FPIN was received on |
|
* @fpin_len: length of FPIN payload, in bytes |
|
* @fpin_buf: pointer to FPIN payload |
|
* |
|
* Notes: |
|
* This routine assumes no locks are held on entry. |
|
*/ |
|
void |
|
fc_host_fpin_rcv(struct Scsi_Host *shost, u32 fpin_len, char *fpin_buf) |
|
{ |
|
struct fc_els_fpin *fpin = (struct fc_els_fpin *)fpin_buf; |
|
struct fc_tlv_desc *tlv; |
|
u32 desc_cnt = 0, bytes_remain; |
|
u32 dtag; |
|
|
|
/* Update Statistics */ |
|
tlv = (struct fc_tlv_desc *)&fpin->fpin_desc[0]; |
|
bytes_remain = fpin_len - offsetof(struct fc_els_fpin, fpin_desc); |
|
bytes_remain = min_t(u32, bytes_remain, be32_to_cpu(fpin->desc_len)); |
|
|
|
while (bytes_remain >= FC_TLV_DESC_HDR_SZ && |
|
bytes_remain >= FC_TLV_DESC_SZ_FROM_LENGTH(tlv)) { |
|
dtag = be32_to_cpu(tlv->desc_tag); |
|
switch (dtag) { |
|
case ELS_DTAG_LNK_INTEGRITY: |
|
fc_fpin_li_stats_update(shost, tlv); |
|
break; |
|
case ELS_DTAG_DELIVERY: |
|
fc_fpin_delivery_stats_update(shost, tlv); |
|
break; |
|
case ELS_DTAG_PEER_CONGEST: |
|
fc_fpin_peer_congn_stats_update(shost, tlv); |
|
break; |
|
case ELS_DTAG_CONGESTION: |
|
fc_fpin_congn_stats_update(shost, tlv); |
|
} |
|
|
|
desc_cnt++; |
|
bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv); |
|
tlv = fc_tlv_next_desc(tlv); |
|
} |
|
|
|
fc_host_post_fc_event(shost, fc_get_event_number(), |
|
FCH_EVT_LINK_FPIN, fpin_len, fpin_buf, 0); |
|
} |
|
EXPORT_SYMBOL(fc_host_fpin_rcv); |
|
|
|
|
|
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_vport_class); |
|
if (error) |
|
goto unreg_host_class; |
|
error = transport_class_register(&fc_rport_class); |
|
if (error) |
|
goto unreg_vport_class; |
|
error = transport_class_register(&fc_transport_class); |
|
if (error) |
|
goto unreg_rport_class; |
|
return 0; |
|
|
|
unreg_rport_class: |
|
transport_class_unregister(&fc_rport_class); |
|
unreg_vport_class: |
|
transport_class_unregister(&fc_vport_class); |
|
unreg_host_class: |
|
transport_class_unregister(&fc_host_class); |
|
return error; |
|
} |
|
|
|
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); |
|
transport_class_unregister(&fc_vport_class); |
|
} |
|
|
|
/* |
|
* FC Remote Port Attribute Management |
|
*/ |
|
|
|
#define fc_rport_show_function(field, format_string, sz, cast) \ |
|
static ssize_t \ |
|
show_fc_rport_##field (struct device *dev, \ |
|
struct device_attribute *attr, char *buf) \ |
|
{ \ |
|
struct fc_rport *rport = transport_class_to_rport(dev); \ |
|
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 device *dev, \ |
|
struct device_attribute *attr, \ |
|
const char *buf, size_t count) \ |
|
{ \ |
|
int val; \ |
|
struct fc_rport *rport = transport_class_to_rport(dev); \ |
|
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_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_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_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 device *dev, \ |
|
struct device_attribute *attr, char *buf) \ |
|
{ \ |
|
struct fc_rport *rport = transport_class_to_rport(dev); \ |
|
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_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_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 device *dev, \ |
|
struct device_attribute *attr, char *buf) \ |
|
{ \ |
|
struct fc_rport *rport = transport_class_to_rport(dev); \ |
|
const char *name; \ |
|
name = get_fc_##title##_name(rport->title); \ |
|
if (!name) \ |
|
return -EINVAL; \ |
|
return snprintf(buf, maxlen, "%s\n", name); \ |
|
} \ |
|
static FC_DEVICE_ATTR(rport, title, S_IRUGO, \ |
|
show_fc_rport_##title, NULL) |
|
|
|
|
|
#define SETUP_RPORT_ATTRIBUTE_RD(field) \ |
|
i->private_rport_attrs[count] = 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] = 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] = 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] = 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 device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct fc_rport *rport = transport_class_to_rport(dev); |
|
if (rport->supported_classes == FC_COS_UNSPECIFIED) |
|
return snprintf(buf, 20, "unspecified\n"); |
|
return get_fc_cos_names(rport->supported_classes, buf); |
|
} |
|
static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO, |
|
show_fc_rport_supported_classes, NULL); |
|
|
|
/* Dynamic Remote Port Attributes */ |
|
|
|
/* |
|
* dev_loss_tmo attribute |
|
*/ |
|
static int fc_str_to_dev_loss(const char *buf, unsigned long *val) |
|
{ |
|
char *cp; |
|
|
|
*val = simple_strtoul(buf, &cp, 0); |
|
if (*cp && (*cp != '\n')) |
|
return -EINVAL; |
|
/* |
|
* Check for overflow; dev_loss_tmo is u32 |
|
*/ |
|
if (*val > UINT_MAX) |
|
return -EINVAL; |
|
|
|
return 0; |
|
} |
|
|
|
static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport, |
|
unsigned long val) |
|
{ |
|
struct Scsi_Host *shost = rport_to_shost(rport); |
|
struct fc_internal *i = to_fc_internal(shost->transportt); |
|
|
|
if ((rport->port_state == FC_PORTSTATE_BLOCKED) || |
|
(rport->port_state == FC_PORTSTATE_DELETED) || |
|
(rport->port_state == FC_PORTSTATE_NOTPRESENT)) |
|
return -EBUSY; |
|
/* |
|
* Check for overflow; dev_loss_tmo is u32 |
|
*/ |
|
if (val > UINT_MAX) |
|
return -EINVAL; |
|
|
|
/* |
|
* If fast_io_fail is off we have to cap |
|
* dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT |
|
*/ |
|
if (rport->fast_io_fail_tmo == -1 && |
|
val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) |
|
return -EINVAL; |
|
|
|
i->f->set_rport_dev_loss_tmo(rport, val); |
|
return 0; |
|
} |
|
|
|
fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) |
|
static ssize_t |
|
store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct fc_rport *rport = transport_class_to_rport(dev); |
|
unsigned long val; |
|
int rc; |
|
|
|
rc = fc_str_to_dev_loss(buf, &val); |
|
if (rc) |
|
return rc; |
|
|
|
rc = fc_rport_set_dev_loss_tmo(rport, val); |
|
if (rc) |
|
return rc; |
|
return count; |
|
} |
|
static FC_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 device *dev, struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct fc_rport *rport = transport_class_to_rport(dev); |
|
|
|
/* 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_PORT_ROLE_UNKNOWN) |
|
return snprintf(buf, 20, "unknown\n"); |
|
return get_fc_port_roles_names(rport->roles, buf); |
|
} |
|
} |
|
static FC_DEVICE_ATTR(rport, roles, S_IRUGO, |
|
show_fc_rport_roles, NULL); |
|
|
|
static ssize_t fc_rport_set_marginal_state(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct fc_rport *rport = transport_class_to_rport(dev); |
|
enum fc_port_state port_state; |
|
int ret = 0; |
|
|
|
ret = get_fc_port_state_match(buf, &port_state); |
|
if (ret) |
|
return -EINVAL; |
|
if (port_state == FC_PORTSTATE_MARGINAL) { |
|
/* |
|
* Change the state to Marginal only if the |
|
* current rport state is Online |
|
* Allow only Online->Marginal |
|
*/ |
|
if (rport->port_state == FC_PORTSTATE_ONLINE) |
|
rport->port_state = port_state; |
|
else |
|
return -EINVAL; |
|
} else if (port_state == FC_PORTSTATE_ONLINE) { |
|
/* |
|
* Change the state to Online only if the |
|
* current rport state is Marginal |
|
* Allow only Marginal->Online |
|
*/ |
|
if (rport->port_state == FC_PORTSTATE_MARGINAL) |
|
rport->port_state = port_state; |
|
else |
|
return -EINVAL; |
|
} else |
|
return -EINVAL; |
|
return count; |
|
} |
|
|
|
static ssize_t |
|
show_fc_rport_port_state(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
const char *name; |
|
struct fc_rport *rport = transport_class_to_rport(dev); |
|
|
|
name = get_fc_port_state_name(rport->port_state); |
|
if (!name) |
|
return -EINVAL; |
|
|
|
return snprintf(buf, 20, "%s\n", name); |
|
} |
|
|
|
static FC_DEVICE_ATTR(rport, port_state, 0444 | 0200, |
|
show_fc_rport_port_state, fc_rport_set_marginal_state); |
|
|
|
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 device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct fc_rport *rport = transport_class_to_rport(dev); |
|
|
|
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 device *dev, |
|
struct device_attribute *attr, const char *buf, |
|
size_t count) |
|
{ |
|
int val; |
|
char *cp; |
|
struct fc_rport *rport = transport_class_to_rport(dev); |
|
|
|
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)) |
|
return -EINVAL; |
|
/* |
|
* Cap fast_io_fail by dev_loss_tmo or |
|
* SCSI_DEVICE_BLOCK_MAX_TIMEOUT. |
|
*/ |
|
if ((val >= rport->dev_loss_tmo) || |
|
(val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) |
|
return -EINVAL; |
|
|
|
rport->fast_io_fail_tmo = val; |
|
} |
|
return count; |
|
} |
|
static FC_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); |
|
|
|
#define fc_rport_fpin_statistic(name) \ |
|
static ssize_t fc_rport_fpinstat_##name(struct device *cd, \ |
|
struct device_attribute *attr, \ |
|
char *buf) \ |
|
{ \ |
|
struct fc_rport *rport = transport_class_to_rport(cd); \ |
|
\ |
|
return snprintf(buf, 20, "0x%llx\n", rport->fpin_stats.name); \ |
|
} \ |
|
static FC_DEVICE_ATTR(rport, fpin_##name, 0444, fc_rport_fpinstat_##name, NULL) |
|
|
|
fc_rport_fpin_statistic(dn); |
|
fc_rport_fpin_statistic(dn_unknown); |
|
fc_rport_fpin_statistic(dn_timeout); |
|
fc_rport_fpin_statistic(dn_unable_to_route); |
|
fc_rport_fpin_statistic(dn_device_specific); |
|
fc_rport_fpin_statistic(cn); |
|
fc_rport_fpin_statistic(cn_clear); |
|
fc_rport_fpin_statistic(cn_lost_credit); |
|
fc_rport_fpin_statistic(cn_credit_stall); |
|
fc_rport_fpin_statistic(cn_oversubscription); |
|
fc_rport_fpin_statistic(cn_device_specific); |
|
fc_rport_fpin_statistic(li); |
|
fc_rport_fpin_statistic(li_failure_unknown); |
|
fc_rport_fpin_statistic(li_link_failure_count); |
|
fc_rport_fpin_statistic(li_loss_of_sync_count); |
|
fc_rport_fpin_statistic(li_loss_of_signals_count); |
|
fc_rport_fpin_statistic(li_prim_seq_err_count); |
|
fc_rport_fpin_statistic(li_invalid_tx_word_count); |
|
fc_rport_fpin_statistic(li_invalid_crc_count); |
|
fc_rport_fpin_statistic(li_device_specific); |
|
|
|
static struct attribute *fc_rport_statistics_attrs[] = { |
|
&device_attr_rport_fpin_dn.attr, |
|
&device_attr_rport_fpin_dn_unknown.attr, |
|
&device_attr_rport_fpin_dn_timeout.attr, |
|
&device_attr_rport_fpin_dn_unable_to_route.attr, |
|
&device_attr_rport_fpin_dn_device_specific.attr, |
|
&device_attr_rport_fpin_li.attr, |
|
&device_attr_rport_fpin_li_failure_unknown.attr, |
|
&device_attr_rport_fpin_li_link_failure_count.attr, |
|
&device_attr_rport_fpin_li_loss_of_sync_count.attr, |
|
&device_attr_rport_fpin_li_loss_of_signals_count.attr, |
|
&device_attr_rport_fpin_li_prim_seq_err_count.attr, |
|
&device_attr_rport_fpin_li_invalid_tx_word_count.attr, |
|
&device_attr_rport_fpin_li_invalid_crc_count.attr, |
|
&device_attr_rport_fpin_li_device_specific.attr, |
|
&device_attr_rport_fpin_cn.attr, |
|
&device_attr_rport_fpin_cn_clear.attr, |
|
&device_attr_rport_fpin_cn_lost_credit.attr, |
|
&device_attr_rport_fpin_cn_credit_stall.attr, |
|
&device_attr_rport_fpin_cn_oversubscription.attr, |
|
&device_attr_rport_fpin_cn_device_specific.attr, |
|
NULL |
|
}; |
|
|
|
static struct attribute_group fc_rport_statistics_group = { |
|
.name = "statistics", |
|
.attrs = fc_rport_statistics_attrs, |
|
}; |
|
|
|
|
|
/* |
|
* 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 device *dev, \ |
|
struct device_attribute *attr, char *buf) \ |
|
{ \ |
|
struct scsi_target *starget = transport_class_to_starget(dev); \ |
|
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_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_DEVICE_ATTR(starget, field, S_IRUGO, \ |
|
show_fc_starget_##field, NULL) |
|
|
|
#define SETUP_STARGET_ATTRIBUTE_RD(field) \ |
|
i->private_starget_attrs[count] = 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] = 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); |
|
|
|
|
|
/* |
|
* FC Virtual Port Attribute Management |
|
*/ |
|
|
|
#define fc_vport_show_function(field, format_string, sz, cast) \ |
|
static ssize_t \ |
|
show_fc_vport_##field (struct device *dev, \ |
|
struct device_attribute *attr, char *buf) \ |
|
{ \ |
|
struct fc_vport *vport = transport_class_to_vport(dev); \ |
|
struct Scsi_Host *shost = vport_to_shost(vport); \ |
|
struct fc_internal *i = to_fc_internal(shost->transportt); \ |
|
if ((i->f->get_vport_##field) && \ |
|
!(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ |
|
i->f->get_vport_##field(vport); \ |
|
return snprintf(buf, sz, format_string, cast vport->field); \ |
|
} |
|
|
|
#define fc_vport_store_function(field) \ |
|
static ssize_t \ |
|
store_fc_vport_##field(struct device *dev, \ |
|
struct device_attribute *attr, \ |
|
const char *buf, size_t count) \ |
|
{ \ |
|
int val; \ |
|
struct fc_vport *vport = transport_class_to_vport(dev); \ |
|
struct Scsi_Host *shost = vport_to_shost(vport); \ |
|
struct fc_internal *i = to_fc_internal(shost->transportt); \ |
|
char *cp; \ |
|
if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ |
|
return -EBUSY; \ |
|
val = simple_strtoul(buf, &cp, 0); \ |
|
if (*cp && (*cp != '\n')) \ |
|
return -EINVAL; \ |
|
i->f->set_vport_##field(vport, val); \ |
|
return count; \ |
|
} |
|
|
|
#define fc_vport_store_str_function(field, slen) \ |
|
static ssize_t \ |
|
store_fc_vport_##field(struct device *dev, \ |
|
struct device_attribute *attr, \ |
|
const char *buf, size_t count) \ |
|
{ \ |
|
struct fc_vport *vport = transport_class_to_vport(dev); \ |
|
struct Scsi_Host *shost = vport_to_shost(vport); \ |
|
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(vport->field, buf, cnt); \ |
|
i->f->set_vport_##field(vport); \ |
|
return count; \ |
|
} |
|
|
|
#define fc_vport_rd_attr(field, format_string, sz) \ |
|
fc_vport_show_function(field, format_string, sz, ) \ |
|
static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
|
show_fc_vport_##field, NULL) |
|
|
|
#define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ |
|
fc_vport_show_function(field, format_string, sz, (cast)) \ |
|
static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
|
show_fc_vport_##field, NULL) |
|
|
|
#define fc_vport_rw_attr(field, format_string, sz) \ |
|
fc_vport_show_function(field, format_string, sz, ) \ |
|
fc_vport_store_function(field) \ |
|
static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ |
|
show_fc_vport_##field, \ |
|
store_fc_vport_##field) |
|
|
|
#define fc_private_vport_show_function(field, format_string, sz, cast) \ |
|
static ssize_t \ |
|
show_fc_vport_##field (struct device *dev, \ |
|
struct device_attribute *attr, char *buf) \ |
|
{ \ |
|
struct fc_vport *vport = transport_class_to_vport(dev); \ |
|
return snprintf(buf, sz, format_string, cast vport->field); \ |
|
} |
|
|
|
#define fc_private_vport_store_u32_function(field) \ |
|
static ssize_t \ |
|
store_fc_vport_##field(struct device *dev, \ |
|
struct device_attribute *attr, \ |
|
const char *buf, size_t count) \ |
|
{ \ |
|
u32 val; \ |
|
struct fc_vport *vport = transport_class_to_vport(dev); \ |
|
char *cp; \ |
|
if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ |
|
return -EBUSY; \ |
|
val = simple_strtoul(buf, &cp, 0); \ |
|
if (*cp && (*cp != '\n')) \ |
|
return -EINVAL; \ |
|
vport->field = val; \ |
|
return count; \ |
|
} |
|
|
|
|
|
#define fc_private_vport_rd_attr(field, format_string, sz) \ |
|
fc_private_vport_show_function(field, format_string, sz, ) \ |
|
static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
|
show_fc_vport_##field, NULL) |
|
|
|
#define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ |
|
fc_private_vport_show_function(field, format_string, sz, (cast)) \ |
|
static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
|
show_fc_vport_##field, NULL) |
|
|
|
#define fc_private_vport_rw_u32_attr(field, format_string, sz) \ |
|
fc_private_vport_show_function(field, format_string, sz, ) \ |
|
fc_private_vport_store_u32_function(field) \ |
|
static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ |
|
show_fc_vport_##field, \ |
|
store_fc_vport_##field) |
|
|
|
|
|
#define fc_private_vport_rd_enum_attr(title, maxlen) \ |
|
static ssize_t \ |
|
show_fc_vport_##title (struct device *dev, \ |
|
struct device_attribute *attr, \ |
|
char *buf) \ |
|
{ \ |
|
struct fc_vport *vport = transport_class_to_vport(dev); \ |
|
const char *name; \ |
|
name = get_fc_##title##_name(vport->title); \ |
|
if (!name) \ |
|
return -EINVAL; \ |
|
return snprintf(buf, maxlen, "%s\n", name); \ |
|
} \ |
|
static FC_DEVICE_ATTR(vport, title, S_IRUGO, \ |
|
show_fc_vport_##title, NULL) |
|
|
|
|
|
#define SETUP_VPORT_ATTRIBUTE_RD(field) \ |
|
i->private_vport_attrs[count] = device_attr_vport_##field; \ |
|
i->private_vport_attrs[count].attr.mode = S_IRUGO; \ |
|
i->private_vport_attrs[count].store = NULL; \ |
|
i->vport_attrs[count] = &i->private_vport_attrs[count]; \ |
|
if (i->f->get_##field) \ |
|
count++ |
|
/* NOTE: Above MACRO differs: checks function not show bit */ |
|
|
|
#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ |
|
i->private_vport_attrs[count] = device_attr_vport_##field; \ |
|
i->private_vport_attrs[count].attr.mode = S_IRUGO; \ |
|
i->private_vport_attrs[count].store = NULL; \ |
|
i->vport_attrs[count] = &i->private_vport_attrs[count]; \ |
|
count++ |
|
|
|
#define SETUP_VPORT_ATTRIBUTE_WR(field) \ |
|
i->private_vport_attrs[count] = device_attr_vport_##field; \ |
|
i->vport_attrs[count] = &i->private_vport_attrs[count]; \ |
|
if (i->f->field) \ |
|
count++ |
|
/* NOTE: Above MACRO differs: checks function */ |
|
|
|
#define SETUP_VPORT_ATTRIBUTE_RW(field) \ |
|
i->private_vport_attrs[count] = device_attr_vport_##field; \ |
|
if (!i->f->set_vport_##field) { \ |
|
i->private_vport_attrs[count].attr.mode = S_IRUGO; \ |
|
i->private_vport_attrs[count].store = NULL; \ |
|
} \ |
|
i->vport_attrs[count] = &i->private_vport_attrs[count]; \ |
|
count++ |
|
/* NOTE: Above MACRO differs: does not check show bit */ |
|
|
|
#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ |
|
{ \ |
|
i->private_vport_attrs[count] = device_attr_vport_##field; \ |
|
i->vport_attrs[count] = &i->private_vport_attrs[count]; \ |
|
count++; \ |
|
} |
|
|
|
|
|
/* The FC Transport Virtual Port Attributes: */ |
|
|
|
/* Fixed Virtual Port Attributes */ |
|
|
|
/* Dynamic Virtual Port Attributes */ |
|
|
|
/* Private Virtual Port Attributes */ |
|
|
|
fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); |
|
fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); |
|
fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); |
|
fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); |
|
|
|
static ssize_t |
|
show_fc_vport_roles (struct device *dev, struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct fc_vport *vport = transport_class_to_vport(dev); |
|
|
|
if (vport->roles == FC_PORT_ROLE_UNKNOWN) |
|
return snprintf(buf, 20, "unknown\n"); |
|
return get_fc_port_roles_names(vport->roles, buf); |
|
} |
|
static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); |
|
|
|
fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); |
|
|
|
fc_private_vport_show_function(symbolic_name, "%s\n", |
|
FC_VPORT_SYMBOLIC_NAMELEN + 1, ) |
|
fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) |
|
static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, |
|
show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); |
|
|
|
static ssize_t |
|
store_fc_vport_delete(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct fc_vport *vport = transport_class_to_vport(dev); |
|
struct Scsi_Host *shost = vport_to_shost(vport); |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(shost->host_lock, flags); |
|
if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING | FC_VPORT_DELETING)) { |
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
return -EBUSY; |
|
} |
|
vport->flags |= FC_VPORT_DELETING; |
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
|
|
fc_queue_work(shost, &vport->vport_delete_work); |
|
return count; |
|
} |
|
static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR, |
|
NULL, store_fc_vport_delete); |
|
|
|
|
|
/* |
|
* Enable/Disable vport |
|
* Write "1" to disable, write "0" to enable |
|
*/ |
|
static ssize_t |
|
store_fc_vport_disable(struct device *dev, struct device_attribute *attr, |
|
const char *buf, |
|
size_t count) |
|
{ |
|
struct fc_vport *vport = transport_class_to_vport(dev); |
|
struct Scsi_Host *shost = vport_to_shost(vport); |
|
struct fc_internal *i = to_fc_internal(shost->transportt); |
|
int stat; |
|
|
|
if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) |
|
return -EBUSY; |
|
|
|
if (*buf == '0') { |
|
if (vport->vport_state != FC_VPORT_DISABLED) |
|
return -EALREADY; |
|
} else if (*buf == '1') { |
|
if (vport->vport_state == FC_VPORT_DISABLED) |
|
return -EALREADY; |
|
} else |
|
return -EINVAL; |
|
|
|
stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); |
|
return stat ? stat : count; |
|
} |
|
static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR, |
|
NULL, store_fc_vport_disable); |
|
|
|
|
|
/* |
|
* Host Attribute Management |
|
*/ |
|
|
|
#define fc_host_show_function(field, format_string, sz, cast) \ |
|
static ssize_t \ |
|
show_fc_host_##field (struct device *dev, \ |
|
struct device_attribute *attr, char *buf) \ |
|
{ \ |
|
struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
|
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 device *dev, \ |
|
struct device_attribute *attr, \ |
|
const char *buf, size_t count) \ |
|
{ \ |
|
int val; \ |
|
struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
|
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 device *dev, \ |
|
struct device_attribute *attr, \ |
|
const char *buf, size_t count) \ |
|
{ \ |
|
struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
|
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_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_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_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 device *dev, \ |
|
struct device_attribute *attr, char *buf) \ |
|
{ \ |
|
struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
|
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_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) |
|
|
|
#define SETUP_HOST_ATTRIBUTE_RD(field) \ |
|
i->private_host_attrs[count] = 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_RD_NS(field) \ |
|
i->private_host_attrs[count] = 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_HOST_ATTRIBUTE_RW(field) \ |
|
i->private_host_attrs[count] = 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 device *dev, \ |
|
struct device_attribute *attr, char *buf) \ |
|
{ \ |
|
struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
|
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_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_DEVICE_ATTR(host, field, S_IRUGO, \ |
|
show_fc_host_##field, NULL) |
|
|
|
#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ |
|
i->private_host_attrs[count] = 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] = 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 device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct Scsi_Host *shost = transport_class_to_shost(dev); |
|
|
|
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_DEVICE_ATTR(host, supported_classes, S_IRUGO, |
|
show_fc_host_supported_classes, NULL); |
|
|
|
static ssize_t |
|
show_fc_host_supported_fc4s (struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct Scsi_Host *shost = transport_class_to_shost(dev); |
|
return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); |
|
} |
|
static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, |
|
show_fc_host_supported_fc4s, NULL); |
|
|
|
static ssize_t |
|
show_fc_host_supported_speeds (struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct Scsi_Host *shost = transport_class_to_shost(dev); |
|
|
|
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_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(max_npiv_vports, "%u\n", 20); |
|
fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); |
|
fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1); |
|
fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); |
|
fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); |
|
fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); |
|
fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1); |
|
fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); |
|
fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1); |
|
|
|
|
|
/* Dynamic Host Attributes */ |
|
|
|
static ssize_t |
|
show_fc_host_active_fc4s (struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct Scsi_Host *shost = transport_class_to_shost(dev); |
|
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_DEVICE_ATTR(host, active_fc4s, S_IRUGO, |
|
show_fc_host_active_fc4s, NULL); |
|
|
|
static ssize_t |
|
show_fc_host_speed (struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct Scsi_Host *shost = transport_class_to_shost(dev); |
|
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_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_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 device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct Scsi_Host *shost = transport_class_to_shost(dev); |
|
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 device *dev, |
|
struct device_attribute *attr, const char *buf, size_t count) |
|
{ |
|
struct Scsi_Host *shost = transport_class_to_shost(dev); |
|
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_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 device *dev, |
|
struct device_attribute *attr, const char *buf, size_t count) |
|
{ |
|
struct Scsi_Host *shost = transport_class_to_shost(dev); |
|
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_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, |
|
store_fc_private_host_issue_lip); |
|
|
|
static ssize_t |
|
store_fc_private_host_dev_loss_tmo(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct Scsi_Host *shost = transport_class_to_shost(dev); |
|
struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
|
struct fc_rport *rport; |
|
unsigned long val, flags; |
|
int rc; |
|
|
|
rc = fc_str_to_dev_loss(buf, &val); |
|
if (rc) |
|
return rc; |
|
|
|
fc_host_dev_loss_tmo(shost) = val; |
|
spin_lock_irqsave(shost->host_lock, flags); |
|
list_for_each_entry(rport, &fc_host->rports, peers) |
|
fc_rport_set_dev_loss_tmo(rport, val); |
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
return count; |
|
} |
|
|
|
fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, ); |
|
static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR, |
|
show_fc_host_dev_loss_tmo, |
|
store_fc_private_host_dev_loss_tmo); |
|
|
|
fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); |
|
|
|
/* |
|
* Host Statistics Management |
|
*/ |
|
|
|
/* Show a given attribute in the statistics group */ |
|
static ssize_t |
|
fc_stat_show(const struct device *dev, char *buf, unsigned long offset) |
|
{ |
|
struct Scsi_Host *shost = transport_class_to_shost(dev); |
|
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 device *cd, \ |
|
struct device_attribute *attr, \ |
|
char *buf) \ |
|
{ \ |
|
return fc_stat_show(cd, buf, \ |
|
offsetof(struct fc_host_statistics, name)); \ |
|
} \ |
|
static FC_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); |
|
fc_host_statistic(fcp_packet_alloc_failures); |
|
fc_host_statistic(fcp_packet_aborts); |
|
fc_host_statistic(fcp_frame_alloc_failures); |
|
fc_host_statistic(fc_no_free_exch); |
|
fc_host_statistic(fc_no_free_exch_xid); |
|
fc_host_statistic(fc_xid_not_found); |
|
fc_host_statistic(fc_xid_busy); |
|
fc_host_statistic(fc_seq_not_found); |
|
fc_host_statistic(fc_non_bls_resp); |
|
fc_host_statistic(cn_sig_warn); |
|
fc_host_statistic(cn_sig_alarm); |
|
|
|
|
|
#define fc_host_fpin_statistic(name) \ |
|
static ssize_t fc_host_fpinstat_##name(struct device *cd, \ |
|
struct device_attribute *attr, \ |
|
char *buf) \ |
|
{ \ |
|
struct Scsi_Host *shost = transport_class_to_shost(cd); \ |
|
struct fc_host_attrs *fc_host = shost_to_fc_host(shost); \ |
|
\ |
|
return snprintf(buf, 20, "0x%llx\n", fc_host->fpin_stats.name); \ |
|
} \ |
|
static FC_DEVICE_ATTR(host, fpin_##name, 0444, fc_host_fpinstat_##name, NULL) |
|
|
|
fc_host_fpin_statistic(dn); |
|
fc_host_fpin_statistic(dn_unknown); |
|
fc_host_fpin_statistic(dn_timeout); |
|
fc_host_fpin_statistic(dn_unable_to_route); |
|
fc_host_fpin_statistic(dn_device_specific); |
|
fc_host_fpin_statistic(cn); |
|
fc_host_fpin_statistic(cn_clear); |
|
fc_host_fpin_statistic(cn_lost_credit); |
|
fc_host_fpin_statistic(cn_credit_stall); |
|
fc_host_fpin_statistic(cn_oversubscription); |
|
fc_host_fpin_statistic(cn_device_specific); |
|
fc_host_fpin_statistic(li); |
|
fc_host_fpin_statistic(li_failure_unknown); |
|
fc_host_fpin_statistic(li_link_failure_count); |
|
fc_host_fpin_statistic(li_loss_of_sync_count); |
|
fc_host_fpin_statistic(li_loss_of_signals_count); |
|
fc_host_fpin_statistic(li_prim_seq_err_count); |
|
fc_host_fpin_statistic(li_invalid_tx_word_count); |
|
fc_host_fpin_statistic(li_invalid_crc_count); |
|
fc_host_fpin_statistic(li_device_specific); |
|
|
|
static ssize_t |
|
fc_reset_statistics(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct Scsi_Host *shost = transport_class_to_shost(dev); |
|
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_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, |
|
fc_reset_statistics); |
|
|
|
static struct attribute *fc_statistics_attrs[] = { |
|
&device_attr_host_seconds_since_last_reset.attr, |
|
&device_attr_host_tx_frames.attr, |
|
&device_attr_host_tx_words.attr, |
|
&device_attr_host_rx_frames.attr, |
|
&device_attr_host_rx_words.attr, |
|
&device_attr_host_lip_count.attr, |
|
&device_attr_host_nos_count.attr, |
|
&device_attr_host_error_frames.attr, |
|
&device_attr_host_dumped_frames.attr, |
|
&device_attr_host_link_failure_count.attr, |
|
&device_attr_host_loss_of_sync_count.attr, |
|
&device_attr_host_loss_of_signal_count.attr, |
|
&device_attr_host_prim_seq_protocol_err_count.attr, |
|
&device_attr_host_invalid_tx_word_count.attr, |
|
&device_attr_host_invalid_crc_count.attr, |
|
&device_attr_host_fcp_input_requests.attr, |
|
&device_attr_host_fcp_output_requests.attr, |
|
&device_attr_host_fcp_control_requests.attr, |
|
&device_attr_host_fcp_input_megabytes.attr, |
|
&device_attr_host_fcp_output_megabytes.attr, |
|
&device_attr_host_fcp_packet_alloc_failures.attr, |
|
&device_attr_host_fcp_packet_aborts.attr, |
|
&device_attr_host_fcp_frame_alloc_failures.attr, |
|
&device_attr_host_fc_no_free_exch.attr, |
|
&device_attr_host_fc_no_free_exch_xid.attr, |
|
&device_attr_host_fc_xid_not_found.attr, |
|
&device_attr_host_fc_xid_busy.attr, |
|
&device_attr_host_fc_seq_not_found.attr, |
|
&device_attr_host_fc_non_bls_resp.attr, |
|
&device_attr_host_cn_sig_warn.attr, |
|
&device_attr_host_cn_sig_alarm.attr, |
|
&device_attr_host_reset_statistics.attr, |
|
&device_attr_host_fpin_dn.attr, |
|
&device_attr_host_fpin_dn_unknown.attr, |
|
&device_attr_host_fpin_dn_timeout.attr, |
|
&device_attr_host_fpin_dn_unable_to_route.attr, |
|
&device_attr_host_fpin_dn_device_specific.attr, |
|
&device_attr_host_fpin_li.attr, |
|
&device_attr_host_fpin_li_failure_unknown.attr, |
|
&device_attr_host_fpin_li_link_failure_count.attr, |
|
&device_attr_host_fpin_li_loss_of_sync_count.attr, |
|
&device_attr_host_fpin_li_loss_of_signals_count.attr, |
|
&device_attr_host_fpin_li_prim_seq_err_count.attr, |
|
&device_attr_host_fpin_li_invalid_tx_word_count.attr, |
|
&device_attr_host_fpin_li_invalid_crc_count.attr, |
|
&device_attr_host_fpin_li_device_specific.attr, |
|
&device_attr_host_fpin_cn.attr, |
|
&device_attr_host_fpin_cn_clear.attr, |
|
&device_attr_host_fpin_cn_lost_credit.attr, |
|
&device_attr_host_fpin_cn_credit_stall.attr, |
|
&device_attr_host_fpin_cn_oversubscription.attr, |
|
&device_attr_host_fpin_cn_device_specific.attr, |
|
NULL |
|
}; |
|
|
|
static struct attribute_group fc_statistics_group = { |
|
.name = "statistics", |
|
.attrs = fc_statistics_attrs, |
|
}; |
|
|
|
|
|
/* Host Vport Attributes */ |
|
|
|
static int |
|
fc_parse_wwn(const char *ns, u64 *nm) |
|
{ |
|
unsigned int i, j; |
|
u8 wwn[8]; |
|
|
|
memset(wwn, 0, sizeof(wwn)); |
|
|
|
/* Validate and store the new name */ |
|
for (i=0, j=0; i < 16; i++) { |
|
int value; |
|
|
|
value = hex_to_bin(*ns++); |
|
if (value >= 0) |
|
j = (j << 4) | value; |
|
else |
|
return -EINVAL; |
|
if (i % 2) { |
|
wwn[i/2] = j & 0xff; |
|
j = 0; |
|
} |
|
} |
|
|
|
*nm = wwn_to_u64(wwn); |
|
|
|
return 0; |
|
} |
|
|
|
|
|
/* |
|
* "Short-cut" sysfs variable to create a new vport on a FC Host. |
|
* Input is a string of the form "<WWPN>:<WWNN>". Other attributes |
|
* will default to a NPIV-based FCP_Initiator; The WWNs are specified |
|
* as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) |
|
*/ |
|
static ssize_t |
|
store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct Scsi_Host *shost = transport_class_to_shost(dev); |
|
struct fc_vport_identifiers vid; |
|
struct fc_vport *vport; |
|
unsigned int cnt=count; |
|
int stat; |
|
|
|
memset(&vid, 0, sizeof(vid)); |
|
|
|
/* count may include a LF at end of string */ |
|
if (buf[cnt-1] == '\n') |
|
cnt--; |
|
|
|
/* validate we have enough characters for WWPN */ |
|
if ((cnt != (16+1+16)) || (buf[16] != ':')) |
|
return -EINVAL; |
|
|
|
stat = fc_parse_wwn(&buf[0], &vid.port_name); |
|
if (stat) |
|
return stat; |
|
|
|
stat = fc_parse_wwn(&buf[17], &vid.node_name); |
|
if (stat) |
|
return stat; |
|
|
|
vid.roles = FC_PORT_ROLE_FCP_INITIATOR; |
|
vid.vport_type = FC_PORTTYPE_NPIV; |
|
/* vid.symbolic_name is already zero/NULL's */ |
|
vid.disable = false; /* always enabled */ |
|
|
|
/* we only allow support on Channel 0 !!! */ |
|
stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); |
|
return stat ? stat : count; |
|
} |
|
static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, |
|
store_fc_host_vport_create); |
|
|
|
|
|
/* |
|
* "Short-cut" sysfs variable to delete a vport on a FC Host. |
|
* Vport is identified by a string containing "<WWPN>:<WWNN>". |
|
* The WWNs are specified as hex characters, and may *not* contain |
|
* any prefixes (e.g. 0x, x, etc) |
|
*/ |
|
static ssize_t |
|
store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct Scsi_Host *shost = transport_class_to_shost(dev); |
|
struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
|
struct fc_vport *vport; |
|
u64 wwpn, wwnn; |
|
unsigned long flags; |
|
unsigned int cnt=count; |
|
int stat, match; |
|
|
|
/* count may include a LF at end of string */ |
|
if (buf[cnt-1] == '\n') |
|
cnt--; |
|
|
|
/* validate we have enough characters for WWPN */ |
|
if ((cnt != (16+1+16)) || (buf[16] != ':')) |
|
return -EINVAL; |
|
|
|
stat = fc_parse_wwn(&buf[0], &wwpn); |
|
if (stat) |
|
return stat; |
|
|
|
stat = fc_parse_wwn(&buf[17], &wwnn); |
|
if (stat) |
|
return stat; |
|
|
|
spin_lock_irqsave(shost->host_lock, flags); |
|
match = 0; |
|
/* we only allow support on Channel 0 !!! */ |
|
list_for_each_entry(vport, &fc_host->vports, peers) { |
|
if ((vport->channel == 0) && |
|
(vport->port_name == wwpn) && (vport->node_name == wwnn)) { |
|
if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) |
|
break; |
|
vport->flags |= FC_VPORT_DELETING; |
|
match = 1; |
|
break; |
|
} |
|
} |
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
|
|
if (!match) |
|
return -ENODEV; |
|
|
|
stat = fc_vport_terminate(vport); |
|
return stat ? stat : count; |
|
} |
|
static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, |
|
store_fc_host_vport_delete); |
|
|
|
|
|
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; |
|
} |
|
|
|
|
|
static void fc_vport_dev_release(struct device *dev) |
|
{ |
|
struct fc_vport *vport = dev_to_vport(dev); |
|
put_device(dev->parent); /* release kobj parent */ |
|
kfree(vport); |
|
} |
|
|
|
static int scsi_is_fc_vport(const struct device *dev) |
|
{ |
|
return dev->release == fc_vport_dev_release; |
|
} |
|
|
|
static int fc_vport_match(struct attribute_container *cont, |
|
struct device *dev) |
|
{ |
|
struct fc_vport *vport; |
|
struct Scsi_Host *shost; |
|
struct fc_internal *i; |
|
|
|
if (!scsi_is_fc_vport(dev)) |
|
return 0; |
|
vport = dev_to_vport(dev); |
|
|
|
shost = vport_to_shost(vport); |
|
if (!shost->transportt || shost->transportt->host_attrs.ac.class |
|
!= &fc_host_class.class) |
|
return 0; |
|
|
|
i = to_fc_internal(shost->transportt); |
|
return &i->vport_attr_cont.ac == cont; |
|
} |
|
|
|
|
|
/** |
|
* fc_eh_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. |
|
*/ |
|
enum blk_eh_timer_return |
|
fc_eh_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 BLK_EH_RESET_TIMER; |
|
|
|
return BLK_EH_DONE; |
|
} |
|
EXPORT_SYMBOL(fc_eh_timed_out); |
|
|
|
/* |
|
* Called by fc_user_scan to locate an rport on the shost that |
|
* matches the channel and target id, and invoke scsi_scan_target() |
|
* on the rport. |
|
*/ |
|
static void |
|
fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun) |
|
{ |
|
struct fc_rport *rport; |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(shost->host_lock, flags); |
|
|
|
list_for_each_entry(rport, &fc_host_rports(shost), peers) { |
|
if (rport->scsi_target_id == -1) |
|
continue; |
|
|
|
if ((rport->port_state != FC_PORTSTATE_ONLINE) && |
|
(rport->port_state != FC_PORTSTATE_MARGINAL)) |
|
continue; |
|
|
|
if ((channel == rport->channel) && |
|
(id == rport->scsi_target_id)) { |
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
scsi_scan_target(&rport->dev, channel, id, lun, |
|
SCSI_SCAN_MANUAL); |
|
return; |
|
} |
|
} |
|
|
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
} |
|
|
|
/* |
|
* Called via sysfs scan routines. Necessary, as the FC transport |
|
* wants to place all target objects below the rport object. So this |
|
* routine must invoke the scsi_scan_target() routine with the rport |
|
* object as the parent. |
|
*/ |
|
static int |
|
fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun) |
|
{ |
|
uint chlo, chhi; |
|
uint tgtlo, tgthi; |
|
|
|
if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || |
|
((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || |
|
((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) |
|
return -EINVAL; |
|
|
|
if (channel == SCAN_WILD_CARD) { |
|
chlo = 0; |
|
chhi = shost->max_channel + 1; |
|
} else { |
|
chlo = channel; |
|
chhi = channel + 1; |
|
} |
|
|
|
if (id == SCAN_WILD_CARD) { |
|
tgtlo = 0; |
|
tgthi = shost->max_id; |
|
} else { |
|
tgtlo = id; |
|
tgthi = id + 1; |
|
} |
|
|
|
for ( ; chlo < chhi; chlo++) |
|
for ( ; tgtlo < tgthi; tgtlo++) |
|
fc_user_scan_tgt(shost, chlo, tgtlo, lun); |
|
|
|
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; |
|
i->rport_attr_cont.statistics = &fc_rport_statistics_group; |
|
transport_container_register(&i->rport_attr_cont); |
|
|
|
i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; |
|
i->vport_attr_cont.ac.class = &fc_vport_class.class; |
|
i->vport_attr_cont.ac.match = fc_vport_match; |
|
transport_container_register(&i->vport_attr_cont); |
|
|
|
i->f = ft; |
|
|
|
/* Transport uses the shost workq for scsi scanning */ |
|
i->t.create_work_queue = 1; |
|
|
|
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); |
|
if (ft->vport_create) { |
|
SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); |
|
SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); |
|
} |
|
SETUP_HOST_ATTRIBUTE_RD(serial_number); |
|
SETUP_HOST_ATTRIBUTE_RD(manufacturer); |
|
SETUP_HOST_ATTRIBUTE_RD(model); |
|
SETUP_HOST_ATTRIBUTE_RD(model_description); |
|
SETUP_HOST_ATTRIBUTE_RD(hardware_version); |
|
SETUP_HOST_ATTRIBUTE_RD(driver_version); |
|
SETUP_HOST_ATTRIBUTE_RD(firmware_version); |
|
SETUP_HOST_ATTRIBUTE_RD(optionrom_version); |
|
|
|
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(dev_loss_tmo); |
|
SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); |
|
if (ft->issue_fc_host_lip) |
|
SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); |
|
if (ft->vport_create) |
|
SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); |
|
if (ft->vport_delete) |
|
SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); |
|
|
|
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_RW(port_state); |
|
SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); |
|
SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); |
|
|
|
BUG_ON(count > FC_RPORT_NUM_ATTRS); |
|
|
|
i->rport_attrs[count] = NULL; |
|
|
|
/* |
|
* Setup Virtual Port Attributes. |
|
*/ |
|
count=0; |
|
SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); |
|
SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); |
|
SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); |
|
SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); |
|
SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); |
|
SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); |
|
SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); |
|
SETUP_VPORT_ATTRIBUTE_WR(vport_delete); |
|
SETUP_VPORT_ATTRIBUTE_WR(vport_disable); |
|
|
|
BUG_ON(count > FC_VPORT_NUM_ATTRS); |
|
|
|
i->vport_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); |
|
transport_container_unregister(&i->vport_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. |
|
* @shost: Which &Scsi_Host |
|
* |
|
* This routine is expected to be called immediately preceding 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_remove_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_vport *vport = NULL, *next_vport = NULL; |
|
struct fc_rport *rport = NULL, *next_rport = NULL; |
|
struct workqueue_struct *work_q; |
|
struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(shost->host_lock, flags); |
|
|
|
/* Remove any vports */ |
|
list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) { |
|
vport->flags |= FC_VPORT_DELETING; |
|
fc_queue_work(shost, &vport->vport_delete_work); |
|
} |
|
|
|
/* 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); |
|
} |
|
|
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
|
|
/* 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); |
|
|
|
static void fc_terminate_rport_io(struct fc_rport *rport) |
|
{ |
|
struct Scsi_Host *shost = rport_to_shost(rport); |
|
struct fc_internal *i = to_fc_internal(shost->transportt); |
|
|
|
/* Involve the LLDD if possible to terminate all io on the rport. */ |
|
if (i->f->terminate_rport_io) |
|
i->f->terminate_rport_io(rport); |
|
|
|
/* |
|
* Must unblock to flush queued IO. scsi-ml will fail incoming reqs. |
|
*/ |
|
scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); |
|
} |
|
|
|
/** |
|
* fc_starget_delete - called to delete the scsi descendants of an rport |
|
* @work: remote port to be operated on. |
|
* |
|
* Deletes target and all sdevs. |
|
*/ |
|
static void |
|
fc_starget_delete(struct work_struct *work) |
|
{ |
|
struct fc_rport *rport = |
|
container_of(work, struct fc_rport, stgt_delete_work); |
|
|
|
fc_terminate_rport_io(rport); |
|
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); |
|
unsigned long flags; |
|
int do_callback = 0; |
|
|
|
fc_terminate_rport_io(rport); |
|
|
|
/* |
|
* 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); |
|
|
|
/* |
|
* Cancel any outstanding timers. These should really exist |
|
* only when rmmod'ing the LLDD and we're asking for |
|
* immediate termination of the rports |
|
*/ |
|
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); |
|
cancel_work_sync(&rport->scan_work); |
|
spin_lock_irqsave(shost->host_lock, flags); |
|
rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; |
|
} |
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
|
|
/* Delete SCSI target and sdevs */ |
|
if (rport->scsi_target_id != -1) |
|
fc_starget_delete(&rport->stgt_delete_work); |
|
|
|
/* |
|
* Notify the driver that the rport is now dead. The LLDD will |
|
* also guarantee that any communication to the rport is terminated |
|
* |
|
* Avoid this call if we already called it when we preserved the |
|
* rport for the binding. |
|
*/ |
|
spin_lock_irqsave(shost->host_lock, flags); |
|
if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && |
|
(i->f->dev_loss_tmo_callbk)) { |
|
rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; |
|
do_callback = 1; |
|
} |
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
|
|
if (do_callback) |
|
i->f->dev_loss_tmo_callbk(rport); |
|
|
|
fc_bsg_remove(rport->rqst_q); |
|
|
|
transport_remove_device(dev); |
|
device_del(dev); |
|
transport_destroy_device(dev); |
|
scsi_host_put(shost); /* for fc_host->rport list */ |
|
put_device(dev); /* for self-reference */ |
|
} |
|
|
|
|
|
/** |
|
* fc_remote_port_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. |
|
*/ |
|
static struct fc_rport * |
|
fc_remote_port_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", __func__); |
|
return NULL; |
|
} |
|
|
|
rport->maxframe_size = -1; |
|
rport->supported_classes = FC_COS_UNSPECIFIED; |
|
rport->dev_loss_tmo = fc_host->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_PORT_ROLE_FCP_TARGET) || |
|
(rport->roles & FC_PORT_ROLE_FCP_DUMMY_INITIATOR)) |
|
rport->scsi_target_id = fc_host->next_target_id++; |
|
else |
|
rport->scsi_target_id = -1; |
|
list_add_tail(&rport->peers, &fc_host->rports); |
|
scsi_host_get(shost); /* 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; |
|
dev_set_name(dev, "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); |
|
|
|
fc_bsg_rportadd(shost, rport); |
|
/* ignore any bsg add error - we just can't do sgio */ |
|
|
|
if (rport->roles & FC_PORT_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); |
|
scsi_host_put(shost); /* for fc_host->rport list */ |
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
put_device(dev->parent); |
|
kfree(rport); |
|
return NULL; |
|
} |
|
|
|
/** |
|
* fc_remote_port_add - notify 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->port_state == FC_PORTSTATE_NOTPRESENT) && |
|
(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) { |
|
|
|
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 not a target, cancel the |
|
* io terminate and rport timers, and |
|
* we're done. |
|
* |
|
* If we were a target, but our new role |
|
* doesn't indicate a target, leave the |
|
* timers running expecting the role to |
|
* change as the target fully logs in. If |
|
* it doesn't, the target will be torn down. |
|
* |
|
* If we were a target, and our role shows |
|
* we're still a target, cancel the timers |
|
* and kick off a scan. |
|
*/ |
|
|
|
/* was a target, not in roles */ |
|
if ((rport->scsi_target_id != -1) && |
|
(!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) |
|
return rport; |
|
|
|
/* |
|
* Stop the fail io and dev_loss timers. |
|
* If they flush, the port_state will |
|
* be checked and will NOOP the function. |
|
*/ |
|
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_FAST_FAIL_TIMEDOUT | |
|
FC_RPORT_DEVLOSS_PENDING | |
|
FC_RPORT_DEVLOSS_CALLBK_DONE); |
|
|
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
|
|
/* if target, initiate a scan */ |
|
if (rport->scsi_target_id != -1) { |
|
scsi_target_unblock(&rport->dev, |
|
SDEV_RUNNING); |
|
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); |
|
} |
|
|
|
fc_bsg_goose_queue(rport); |
|
|
|
return rport; |
|
} |
|
} |
|
} |
|
|
|
/* |
|
* Search the bindings array |
|
* Note: if never a FCP target, you won't be on this list |
|
*/ |
|
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->port_state = FC_PORTSTATE_ONLINE; |
|
rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; |
|
|
|
if (fci->f->dd_fcrport_size) |
|
memset(rport->dd_data, 0, |
|
fci->f->dd_fcrport_size); |
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
|
|
fc_remote_port_rolechg(rport, ids->roles); |
|
return rport; |
|
} |
|
} |
|
|
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
|
|
/* No consistent binding found - create new remote port entry */ |
|
rport = fc_remote_port_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: |
|
* |
|
* 1) 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. |
|
* |
|
* 2) 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 also remain. |
|
* |
|
* 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 to 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); |
|
unsigned long 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 ((rport->port_state != FC_PORTSTATE_ONLINE) && |
|
(rport->port_state != FC_PORTSTATE_MARGINAL)) { |
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
return; |
|
} |
|
|
|
/* |
|
* In the past, we if this was not an FCP-Target, we would |
|
* unconditionally just jump to deleting the rport. |
|
* However, rports can be used as node containers by the LLDD, |
|
* and its not appropriate to just terminate the rport at the |
|
* first sign of a loss in connectivity. The LLDD may want to |
|
* send ELS traffic to re-validate the login. If the rport is |
|
* immediately deleted, it makes it inappropriate for a node |
|
* container. |
|
* So... we now unconditionally wait dev_loss_tmo before |
|
* destroying an rport. |
|
*/ |
|
|
|
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)) |
|
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. |
|
* @roles: New roles for this port. |
|
* |
|
* Description: 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_PORT_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_PORT_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 exists and is 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_FAST_FAIL_TIMEDOUT | |
|
FC_RPORT_DEVLOSS_PENDING | |
|
FC_RPORT_DEVLOSS_CALLBK_DONE); |
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
|
|
/* ensure any stgt delete functions are done */ |
|
fc_flush_work(shost); |
|
|
|
scsi_target_unblock(&rport->dev, SDEV_RUNNING); |
|
/* 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); |
|
} |
|
} |
|
EXPORT_SYMBOL(fc_remote_port_rolechg); |
|
|
|
/** |
|
* fc_timeout_deleted_rport - Timeout handler for a deleted remote port. |
|
* @work: rport target that failed to reappear in the allotted time. |
|
* |
|
* Description: An attempt to delete a remote port blocks, and if it fails |
|
* to return in the allotted time this gets called. |
|
*/ |
|
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_internal *i = to_fc_internal(shost->transportt); |
|
struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
|
unsigned long flags; |
|
int do_callback = 0; |
|
|
|
spin_lock_irqsave(shost->host_lock, flags); |
|
|
|
rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; |
|
|
|
/* |
|
* If the port is ONLINE, then it came back. If it was a SCSI |
|
* target, validate it still is. If not, tear down the |
|
* scsi_target on it. |
|
*/ |
|
if (((rport->port_state == FC_PORTSTATE_ONLINE) || |
|
(rport->port_state == FC_PORTSTATE_MARGINAL)) && |
|
(rport->scsi_target_id != -1) && |
|
!(rport->roles & FC_PORT_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, SDEV_TRANSPORT_OFFLINE); |
|
fc_queue_work(shost, &rport->stgt_delete_work); |
|
return; |
|
} |
|
|
|
/* NOOP state - we're flushing workq's */ |
|
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" |
|
" rport%s alone\n", |
|
(rport->scsi_target_id != -1) ? " and starget" : ""); |
|
return; |
|
} |
|
|
|
if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || |
|
(rport->scsi_target_id == -1)) { |
|
list_del(&rport->peers); |
|
rport->port_state = FC_PORTSTATE_DELETED; |
|
dev_printk(KERN_ERR, &rport->dev, |
|
"blocked FC remote port time out: removing" |
|
" rport%s\n", |
|
(rport->scsi_target_id != -1) ? " and starget" : ""); |
|
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_PORT_ROLE_UNKNOWN; |
|
rport->port_state = FC_PORTSTATE_NOTPRESENT; |
|
rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; |
|
|
|
/* |
|
* Pre-emptively kill I/O rather than waiting for the work queue |
|
* item to teardown the starget. (FCOE libFC folks prefer this |
|
* and to have the rport_port_id still set when it's done). |
|
*/ |
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
fc_terminate_rport_io(rport); |
|
|
|
spin_lock_irqsave(shost->host_lock, flags); |
|
|
|
if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */ |
|
|
|
/* 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. |
|
*/ |
|
rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; |
|
fc_queue_work(shost, &rport->stgt_delete_work); |
|
|
|
do_callback = 1; |
|
} |
|
|
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
|
|
/* |
|
* Notify the driver that the rport is now dead. The LLDD will |
|
* also guarantee that any communication to the rport is terminated |
|
* |
|
* Note: we set the CALLBK_DONE flag above to correspond |
|
*/ |
|
if (do_callback && i->f->dev_loss_tmo_callbk) |
|
i->f->dev_loss_tmo_callbk(rport); |
|
} |
|
|
|
|
|
/** |
|
* 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); |
|
|
|
if (rport->port_state != FC_PORTSTATE_BLOCKED) |
|
return; |
|
|
|
rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; |
|
fc_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); |
|
struct fc_internal *i = to_fc_internal(shost->transportt); |
|
unsigned long flags; |
|
|
|
if (((rport->port_state == FC_PORTSTATE_ONLINE) || |
|
(rport->port_state == FC_PORTSTATE_MARGINAL)) && |
|
(rport->roles & FC_PORT_ROLE_FCP_TARGET) && |
|
!(i->f->disable_target_scan)) { |
|
scsi_scan_target(&rport->dev, rport->channel, |
|
rport->scsi_target_id, SCAN_WILD_CARD, |
|
SCSI_SCAN_RESCAN); |
|
} |
|
|
|
spin_lock_irqsave(shost->host_lock, flags); |
|
rport->flags &= ~FC_RPORT_SCAN_PENDING; |
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
} |
|
|
|
/** |
|
* fc_block_rport() - Block SCSI eh thread for blocked fc_rport. |
|
* @rport: Remote port that scsi_eh is trying to recover. |
|
* |
|
* This routine can be called from a FC LLD scsi_eh callback. It |
|
* blocks the scsi_eh thread until the fc_rport leaves the |
|
* FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is |
|
* necessary to avoid the scsi_eh failing recovery actions for blocked |
|
* rports which would lead to offlined SCSI devices. |
|
* |
|
* Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. |
|
* FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be |
|
* passed back to scsi_eh. |
|
*/ |
|
int fc_block_rport(struct fc_rport *rport) |
|
{ |
|
struct Scsi_Host *shost = rport_to_shost(rport); |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(shost->host_lock, flags); |
|
while (rport->port_state == FC_PORTSTATE_BLOCKED && |
|
!(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) { |
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
msleep(1000); |
|
spin_lock_irqsave(shost->host_lock, flags); |
|
} |
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
|
|
if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT) |
|
return FAST_IO_FAIL; |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL(fc_block_rport); |
|
|
|
/** |
|
* fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport |
|
* @cmnd: SCSI command that scsi_eh is trying to recover |
|
* |
|
* This routine can be called from a FC LLD scsi_eh callback. It |
|
* blocks the scsi_eh thread until the fc_rport leaves the |
|
* FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is |
|
* necessary to avoid the scsi_eh failing recovery actions for blocked |
|
* rports which would lead to offlined SCSI devices. |
|
* |
|
* Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. |
|
* FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be |
|
* passed back to scsi_eh. |
|
*/ |
|
int fc_block_scsi_eh(struct scsi_cmnd *cmnd) |
|
{ |
|
struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); |
|
|
|
if (WARN_ON_ONCE(!rport)) |
|
return FAST_IO_FAIL; |
|
|
|
return fc_block_rport(rport); |
|
} |
|
EXPORT_SYMBOL(fc_block_scsi_eh); |
|
|
|
/* |
|
* fc_eh_should_retry_cmd - Checks if the cmd should be retried or not |
|
* @scmd: The SCSI command to be checked |
|
* |
|
* This checks the rport state to decide if a cmd is |
|
* retryable. |
|
* |
|
* Returns: true if the rport state is not in marginal state. |
|
*/ |
|
bool fc_eh_should_retry_cmd(struct scsi_cmnd *scmd) |
|
{ |
|
struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); |
|
|
|
if ((rport->port_state != FC_PORTSTATE_ONLINE) && |
|
(scmd->request->cmd_flags & REQ_FAILFAST_TRANSPORT)) { |
|
set_host_byte(scmd, DID_TRANSPORT_MARGINAL); |
|
return false; |
|
} |
|
return true; |
|
} |
|
EXPORT_SYMBOL_GPL(fc_eh_should_retry_cmd); |
|
|
|
/** |
|
* fc_vport_setup - allocates and creates a FC virtual port. |
|
* @shost: scsi host the virtual port is connected to. |
|
* @channel: Channel on shost port connected to. |
|
* @pdev: parent device for vport |
|
* @ids: The world wide names, FC4 port roles, etc for |
|
* the virtual port. |
|
* @ret_vport: The pointer to the created vport. |
|
* |
|
* Allocates and creates the vport structure, calls the parent host |
|
* to instantiate the vport, this completes w/ class and sysfs creation. |
|
* |
|
* Notes: |
|
* This routine assumes no locks are held on entry. |
|
*/ |
|
static int |
|
fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, |
|
struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) |
|
{ |
|
struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
|
struct fc_internal *fci = to_fc_internal(shost->transportt); |
|
struct fc_vport *vport; |
|
struct device *dev; |
|
unsigned long flags; |
|
size_t size; |
|
int error; |
|
|
|
*ret_vport = NULL; |
|
|
|
if ( ! fci->f->vport_create) |
|
return -ENOENT; |
|
|
|
size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); |
|
vport = kzalloc(size, GFP_KERNEL); |
|
if (unlikely(!vport)) { |
|
printk(KERN_ERR "%s: allocation failure\n", __func__); |
|
return -ENOMEM; |
|
} |
|
|
|
vport->vport_state = FC_VPORT_UNKNOWN; |
|
vport->vport_last_state = FC_VPORT_UNKNOWN; |
|
vport->node_name = ids->node_name; |
|
vport->port_name = ids->port_name; |
|
vport->roles = ids->roles; |
|
vport->vport_type = ids->vport_type; |
|
if (fci->f->dd_fcvport_size) |
|
vport->dd_data = &vport[1]; |
|
vport->shost = shost; |
|
vport->channel = channel; |
|
vport->flags = FC_VPORT_CREATING; |
|
INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); |
|
|
|
spin_lock_irqsave(shost->host_lock, flags); |
|
|
|
if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { |
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
kfree(vport); |
|
return -ENOSPC; |
|
} |
|
fc_host->npiv_vports_inuse++; |
|
vport->number = fc_host->next_vport_number++; |
|
list_add_tail(&vport->peers, &fc_host->vports); |
|
scsi_host_get(shost); /* for fc_host->vport list */ |
|
|
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
|
|
dev = &vport->dev; |
|
device_initialize(dev); /* takes self reference */ |
|
dev->parent = get_device(pdev); /* takes parent reference */ |
|
dev->release = fc_vport_dev_release; |
|
dev_set_name(dev, "vport-%d:%d-%d", |
|
shost->host_no, channel, vport->number); |
|
transport_setup_device(dev); |
|
|
|
error = device_add(dev); |
|
if (error) { |
|
printk(KERN_ERR "FC Virtual Port device_add failed\n"); |
|
goto delete_vport; |
|
} |
|
transport_add_device(dev); |
|
transport_configure_device(dev); |
|
|
|
error = fci->f->vport_create(vport, ids->disable); |
|
if (error) { |
|
printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); |
|
goto delete_vport_all; |
|
} |
|
|
|
/* |
|
* if the parent isn't the physical adapter's Scsi_Host, ensure |
|
* the Scsi_Host at least contains a symlink to the vport. |
|
*/ |
|
if (pdev != &shost->shost_gendev) { |
|
error = sysfs_create_link(&shost->shost_gendev.kobj, |
|
&dev->kobj, dev_name(dev)); |
|
if (error) |
|
printk(KERN_ERR |
|
"%s: Cannot create vport symlinks for " |
|
"%s, err=%d\n", |
|
__func__, dev_name(dev), error); |
|
} |
|
spin_lock_irqsave(shost->host_lock, flags); |
|
vport->flags &= ~FC_VPORT_CREATING; |
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
|
|
dev_printk(KERN_NOTICE, pdev, |
|
"%s created via shost%d channel %d\n", dev_name(dev), |
|
shost->host_no, channel); |
|
|
|
*ret_vport = vport; |
|
|
|
return 0; |
|
|
|
delete_vport_all: |
|
transport_remove_device(dev); |
|
device_del(dev); |
|
delete_vport: |
|
transport_destroy_device(dev); |
|
spin_lock_irqsave(shost->host_lock, flags); |
|
list_del(&vport->peers); |
|
scsi_host_put(shost); /* for fc_host->vport list */ |
|
fc_host->npiv_vports_inuse--; |
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
put_device(dev->parent); |
|
kfree(vport); |
|
|
|
return error; |
|
} |
|
|
|
/** |
|
* fc_vport_create - Admin App or LLDD requests creation of a vport |
|
* @shost: scsi host the virtual port is connected to. |
|
* @channel: channel on shost port connected to. |
|
* @ids: The world wide names, FC4 port roles, etc for |
|
* the virtual port. |
|
* |
|
* Notes: |
|
* This routine assumes no locks are held on entry. |
|
*/ |
|
struct fc_vport * |
|
fc_vport_create(struct Scsi_Host *shost, int channel, |
|
struct fc_vport_identifiers *ids) |
|
{ |
|
int stat; |
|
struct fc_vport *vport; |
|
|
|
stat = fc_vport_setup(shost, channel, &shost->shost_gendev, |
|
ids, &vport); |
|
return stat ? NULL : vport; |
|
} |
|
EXPORT_SYMBOL(fc_vport_create); |
|
|
|
/** |
|
* fc_vport_terminate - Admin App or LLDD requests termination of a vport |
|
* @vport: fc_vport to be terminated |
|
* |
|
* Calls the LLDD vport_delete() function, then deallocates and removes |
|
* the vport from the shost and object tree. |
|
* |
|
* Notes: |
|
* This routine assumes no locks are held on entry. |
|
*/ |
|
int |
|
fc_vport_terminate(struct fc_vport *vport) |
|
{ |
|
struct Scsi_Host *shost = vport_to_shost(vport); |
|
struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
|
struct fc_internal *i = to_fc_internal(shost->transportt); |
|
struct device *dev = &vport->dev; |
|
unsigned long flags; |
|
int stat; |
|
|
|
if (i->f->vport_delete) |
|
stat = i->f->vport_delete(vport); |
|
else |
|
stat = -ENOENT; |
|
|
|
spin_lock_irqsave(shost->host_lock, flags); |
|
vport->flags &= ~FC_VPORT_DELETING; |
|
if (!stat) { |
|
vport->flags |= FC_VPORT_DELETED; |
|
list_del(&vport->peers); |
|
fc_host->npiv_vports_inuse--; |
|
scsi_host_put(shost); /* for fc_host->vport list */ |
|
} |
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
|
|
if (stat) |
|
return stat; |
|
|
|
if (dev->parent != &shost->shost_gendev) |
|
sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev)); |
|
transport_remove_device(dev); |
|
device_del(dev); |
|
transport_destroy_device(dev); |
|
|
|
/* |
|
* Removing our self-reference should mean our |
|
* release function gets called, which will drop the remaining |
|
* parent reference and free the data structure. |
|
*/ |
|
put_device(dev); /* for self-reference */ |
|
|
|
return 0; /* SUCCESS */ |
|
} |
|
EXPORT_SYMBOL(fc_vport_terminate); |
|
|
|
/** |
|
* fc_vport_sched_delete - workq-based delete request for a vport |
|
* @work: vport to be deleted. |
|
*/ |
|
static void |
|
fc_vport_sched_delete(struct work_struct *work) |
|
{ |
|
struct fc_vport *vport = |
|
container_of(work, struct fc_vport, vport_delete_work); |
|
int stat; |
|
|
|
stat = fc_vport_terminate(vport); |
|
if (stat) |
|
dev_printk(KERN_ERR, vport->dev.parent, |
|
"%s: %s could not be deleted created via " |
|
"shost%d channel %d - error %d\n", __func__, |
|
dev_name(&vport->dev), vport->shost->host_no, |
|
vport->channel, stat); |
|
} |
|
|
|
|
|
/* |
|
* BSG support |
|
*/ |
|
|
|
/** |
|
* fc_bsg_job_timeout - handler for when a bsg request timesout |
|
* @req: request that timed out |
|
*/ |
|
static enum blk_eh_timer_return |
|
fc_bsg_job_timeout(struct request *req) |
|
{ |
|
struct bsg_job *job = blk_mq_rq_to_pdu(req); |
|
struct Scsi_Host *shost = fc_bsg_to_shost(job); |
|
struct fc_rport *rport = fc_bsg_to_rport(job); |
|
struct fc_internal *i = to_fc_internal(shost->transportt); |
|
int err = 0, inflight = 0; |
|
|
|
if (rport && rport->port_state == FC_PORTSTATE_BLOCKED) |
|
return BLK_EH_RESET_TIMER; |
|
|
|
inflight = bsg_job_get(job); |
|
|
|
if (inflight && i->f->bsg_timeout) { |
|
/* call LLDD to abort the i/o as it has timed out */ |
|
err = i->f->bsg_timeout(job); |
|
if (err == -EAGAIN) { |
|
bsg_job_put(job); |
|
return BLK_EH_RESET_TIMER; |
|
} else if (err) |
|
printk(KERN_ERR "ERROR: FC BSG request timeout - LLD " |
|
"abort failed with status %d\n", err); |
|
} |
|
|
|
/* the blk_end_sync_io() doesn't check the error */ |
|
if (inflight) |
|
blk_mq_end_request(req, BLK_STS_IOERR); |
|
return BLK_EH_DONE; |
|
} |
|
|
|
/** |
|
* fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD |
|
* @shost: scsi host rport attached to |
|
* @job: bsg job to be processed |
|
*/ |
|
static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job) |
|
{ |
|
struct fc_internal *i = to_fc_internal(shost->transportt); |
|
struct fc_bsg_request *bsg_request = job->request; |
|
struct fc_bsg_reply *bsg_reply = job->reply; |
|
int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ |
|
int ret; |
|
|
|
/* check if we really have all the request data needed */ |
|
if (job->request_len < cmdlen) { |
|
ret = -ENOMSG; |
|
goto fail_host_msg; |
|
} |
|
|
|
/* Validate the host command */ |
|
switch (bsg_request->msgcode) { |
|
case FC_BSG_HST_ADD_RPORT: |
|
cmdlen += sizeof(struct fc_bsg_host_add_rport); |
|
break; |
|
|
|
case FC_BSG_HST_DEL_RPORT: |
|
cmdlen += sizeof(struct fc_bsg_host_del_rport); |
|
break; |
|
|
|
case FC_BSG_HST_ELS_NOLOGIN: |
|
cmdlen += sizeof(struct fc_bsg_host_els); |
|
/* there better be a xmt and rcv payloads */ |
|
if ((!job->request_payload.payload_len) || |
|
(!job->reply_payload.payload_len)) { |
|
ret = -EINVAL; |
|
goto fail_host_msg; |
|
} |
|
break; |
|
|
|
case FC_BSG_HST_CT: |
|
cmdlen += sizeof(struct fc_bsg_host_ct); |
|
/* there better be xmt and rcv payloads */ |
|
if ((!job->request_payload.payload_len) || |
|
(!job->reply_payload.payload_len)) { |
|
ret = -EINVAL; |
|
goto fail_host_msg; |
|
} |
|
break; |
|
|
|
case FC_BSG_HST_VENDOR: |
|
cmdlen += sizeof(struct fc_bsg_host_vendor); |
|
if ((shost->hostt->vendor_id == 0L) || |
|
(bsg_request->rqst_data.h_vendor.vendor_id != |
|
shost->hostt->vendor_id)) { |
|
ret = -ESRCH; |
|
goto fail_host_msg; |
|
} |
|
break; |
|
|
|
default: |
|
ret = -EBADR; |
|
goto fail_host_msg; |
|
} |
|
|
|
ret = i->f->bsg_request(job); |
|
if (!ret) |
|
return 0; |
|
|
|
fail_host_msg: |
|
/* return the errno failure code as the only status */ |
|
BUG_ON(job->reply_len < sizeof(uint32_t)); |
|
bsg_reply->reply_payload_rcv_len = 0; |
|
bsg_reply->result = ret; |
|
job->reply_len = sizeof(uint32_t); |
|
bsg_job_done(job, bsg_reply->result, |
|
bsg_reply->reply_payload_rcv_len); |
|
return 0; |
|
} |
|
|
|
|
|
/* |
|
* fc_bsg_goose_queue - restart rport queue in case it was stopped |
|
* @rport: rport to be restarted |
|
*/ |
|
static void |
|
fc_bsg_goose_queue(struct fc_rport *rport) |
|
{ |
|
struct request_queue *q = rport->rqst_q; |
|
|
|
if (q) |
|
blk_mq_run_hw_queues(q, true); |
|
} |
|
|
|
/** |
|
* fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD |
|
* @shost: scsi host rport attached to |
|
* @job: bsg job to be processed |
|
*/ |
|
static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job) |
|
{ |
|
struct fc_internal *i = to_fc_internal(shost->transportt); |
|
struct fc_bsg_request *bsg_request = job->request; |
|
struct fc_bsg_reply *bsg_reply = job->reply; |
|
int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ |
|
int ret; |
|
|
|
/* check if we really have all the request data needed */ |
|
if (job->request_len < cmdlen) { |
|
ret = -ENOMSG; |
|
goto fail_rport_msg; |
|
} |
|
|
|
/* Validate the rport command */ |
|
switch (bsg_request->msgcode) { |
|
case FC_BSG_RPT_ELS: |
|
cmdlen += sizeof(struct fc_bsg_rport_els); |
|
goto check_bidi; |
|
|
|
case FC_BSG_RPT_CT: |
|
cmdlen += sizeof(struct fc_bsg_rport_ct); |
|
check_bidi: |
|
/* there better be xmt and rcv payloads */ |
|
if ((!job->request_payload.payload_len) || |
|
(!job->reply_payload.payload_len)) { |
|
ret = -EINVAL; |
|
goto fail_rport_msg; |
|
} |
|
break; |
|
default: |
|
ret = -EBADR; |
|
goto fail_rport_msg; |
|
} |
|
|
|
ret = i->f->bsg_request(job); |
|
if (!ret) |
|
return 0; |
|
|
|
fail_rport_msg: |
|
/* return the errno failure code as the only status */ |
|
BUG_ON(job->reply_len < sizeof(uint32_t)); |
|
bsg_reply->reply_payload_rcv_len = 0; |
|
bsg_reply->result = ret; |
|
job->reply_len = sizeof(uint32_t); |
|
bsg_job_done(job, bsg_reply->result, |
|
bsg_reply->reply_payload_rcv_len); |
|
return 0; |
|
} |
|
|
|
static int fc_bsg_dispatch(struct bsg_job *job) |
|
{ |
|
struct Scsi_Host *shost = fc_bsg_to_shost(job); |
|
|
|
if (scsi_is_fc_rport(job->dev)) |
|
return fc_bsg_rport_dispatch(shost, job); |
|
else |
|
return fc_bsg_host_dispatch(shost, job); |
|
} |
|
|
|
static blk_status_t fc_bsg_rport_prep(struct fc_rport *rport) |
|
{ |
|
if (rport->port_state == FC_PORTSTATE_BLOCKED && |
|
!(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) |
|
return BLK_STS_RESOURCE; |
|
|
|
if ((rport->port_state != FC_PORTSTATE_ONLINE) && |
|
(rport->port_state != FC_PORTSTATE_MARGINAL)) |
|
return BLK_STS_IOERR; |
|
|
|
return BLK_STS_OK; |
|
} |
|
|
|
|
|
static int fc_bsg_dispatch_prep(struct bsg_job *job) |
|
{ |
|
struct fc_rport *rport = fc_bsg_to_rport(job); |
|
blk_status_t ret; |
|
|
|
ret = fc_bsg_rport_prep(rport); |
|
switch (ret) { |
|
case BLK_STS_OK: |
|
break; |
|
case BLK_STS_RESOURCE: |
|
return -EAGAIN; |
|
default: |
|
return -EIO; |
|
} |
|
|
|
return fc_bsg_dispatch(job); |
|
} |
|
|
|
/** |
|
* fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests |
|
* @shost: shost for fc_host |
|
* @fc_host: fc_host adding the structures to |
|
*/ |
|
static int |
|
fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host) |
|
{ |
|
struct device *dev = &shost->shost_gendev; |
|
struct fc_internal *i = to_fc_internal(shost->transportt); |
|
struct request_queue *q; |
|
char bsg_name[20]; |
|
|
|
fc_host->rqst_q = NULL; |
|
|
|
if (!i->f->bsg_request) |
|
return -ENOTSUPP; |
|
|
|
snprintf(bsg_name, sizeof(bsg_name), |
|
"fc_host%d", shost->host_no); |
|
|
|
q = bsg_setup_queue(dev, bsg_name, fc_bsg_dispatch, fc_bsg_job_timeout, |
|
i->f->dd_bsg_size); |
|
if (IS_ERR(q)) { |
|
dev_err(dev, |
|
"fc_host%d: bsg interface failed to initialize - setup queue\n", |
|
shost->host_no); |
|
return PTR_ERR(q); |
|
} |
|
__scsi_init_queue(shost, q); |
|
blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); |
|
fc_host->rqst_q = q; |
|
return 0; |
|
} |
|
|
|
/** |
|
* fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests |
|
* @shost: shost that rport is attached to |
|
* @rport: rport that the bsg hooks are being attached to |
|
*/ |
|
static int |
|
fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport) |
|
{ |
|
struct device *dev = &rport->dev; |
|
struct fc_internal *i = to_fc_internal(shost->transportt); |
|
struct request_queue *q; |
|
|
|
rport->rqst_q = NULL; |
|
|
|
if (!i->f->bsg_request) |
|
return -ENOTSUPP; |
|
|
|
q = bsg_setup_queue(dev, dev_name(dev), fc_bsg_dispatch_prep, |
|
fc_bsg_job_timeout, i->f->dd_bsg_size); |
|
if (IS_ERR(q)) { |
|
dev_err(dev, "failed to setup bsg queue\n"); |
|
return PTR_ERR(q); |
|
} |
|
__scsi_init_queue(shost, q); |
|
blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); |
|
rport->rqst_q = q; |
|
return 0; |
|
} |
|
|
|
|
|
/** |
|
* fc_bsg_remove - Deletes the bsg hooks on fchosts/rports |
|
* @q: the request_queue that is to be torn down. |
|
* |
|
* Notes: |
|
* Before unregistering the queue empty any requests that are blocked |
|
* |
|
* |
|
*/ |
|
static void |
|
fc_bsg_remove(struct request_queue *q) |
|
{ |
|
bsg_remove_queue(q); |
|
} |
|
|
|
|
|
/* Original Author: Martin Hicks */ |
|
MODULE_AUTHOR("James Smart"); |
|
MODULE_DESCRIPTION("FC Transport Attributes"); |
|
MODULE_LICENSE("GPL"); |
|
|
|
module_init(fc_transport_init); |
|
module_exit(fc_transport_exit);
|
|
|