| /* |
| * FiberChannel transport specific attributes exported to sysfs. |
| * |
| * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| * ======== |
| * |
| * Copyright (C) 2004-2005 James Smart, Emulex Corporation |
| * Rewrite for host, target, device, and remote port attributes, |
| * statistics, and service functions... |
| * |
| */ |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/sched.h> /* workqueue stuff, HZ */ |
| #include <scsi/scsi_device.h> |
| #include <scsi/scsi_host.h> |
| #include <scsi/scsi_transport.h> |
| #include <scsi/scsi_transport_fc.h> |
| #include <scsi/scsi_cmnd.h> |
| #include "scsi_priv.h" |
| |
| static int fc_queue_work(struct Scsi_Host *, struct work_struct *); |
| |
| /* |
| * Redefine so that we can have same named attributes in the |
| * sdev/starget/host objects. |
| */ |
| #define FC_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ |
| struct class_device_attribute class_device_attr_##_prefix##_##_name = \ |
| __ATTR(_name,_mode,_show,_store) |
| |
| #define fc_enum_name_search(title, table_type, table) \ |
| static const char *get_fc_##title##_name(enum table_type table_key) \ |
| { \ |
| int i; \ |
| char *name = NULL; \ |
| \ |
| for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
| if (table[i].value == table_key) { \ |
| name = table[i].name; \ |
| break; \ |
| } \ |
| } \ |
| return name; \ |
| } |
| |
| #define fc_enum_name_match(title, table_type, table) \ |
| static int get_fc_##title##_match(const char *table_key, \ |
| enum table_type *value) \ |
| { \ |
| int i; \ |
| \ |
| for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
| if (strncmp(table_key, table[i].name, \ |
| table[i].matchlen) == 0) { \ |
| *value = table[i].value; \ |
| return 0; /* success */ \ |
| } \ |
| } \ |
| return 1; /* failure */ \ |
| } |
| |
| |
| /* Convert fc_port_type values to ascii string name */ |
| static struct { |
| enum fc_port_type value; |
| char *name; |
| } fc_port_type_names[] = { |
| { FC_PORTTYPE_UNKNOWN, "Unknown" }, |
| { FC_PORTTYPE_OTHER, "Other" }, |
| { FC_PORTTYPE_NOTPRESENT, "Not Present" }, |
| { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" }, |
| { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" }, |
| { FC_PORTTYPE_LPORT, "LPort (private loop)" }, |
| { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection" }, |
| }; |
| fc_enum_name_search(port_type, fc_port_type, fc_port_type_names) |
| #define FC_PORTTYPE_MAX_NAMELEN 50 |
| |
| |
| /* Convert fc_port_state values to ascii string name */ |
| static struct { |
| enum fc_port_state value; |
| char *name; |
| } fc_port_state_names[] = { |
| { FC_PORTSTATE_UNKNOWN, "Unknown" }, |
| { FC_PORTSTATE_NOTPRESENT, "Not Present" }, |
| { FC_PORTSTATE_ONLINE, "Online" }, |
| { FC_PORTSTATE_OFFLINE, "Offline" }, |
| { FC_PORTSTATE_BLOCKED, "Blocked" }, |
| { FC_PORTSTATE_BYPASSED, "Bypassed" }, |
| { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" }, |
| { FC_PORTSTATE_LINKDOWN, "Linkdown" }, |
| { FC_PORTSTATE_ERROR, "Error" }, |
| { FC_PORTSTATE_LOOPBACK, "Loopback" }, |
| { FC_PORTSTATE_DELETED, "Deleted" }, |
| }; |
| fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) |
| #define FC_PORTSTATE_MAX_NAMELEN 20 |
| |
| |
| /* Convert fc_tgtid_binding_type values to ascii string name */ |
| static const struct { |
| enum fc_tgtid_binding_type value; |
| char *name; |
| int matchlen; |
| } fc_tgtid_binding_type_names[] = { |
| { FC_TGTID_BIND_NONE, "none", 4 }, |
| { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, |
| { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, |
| { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, |
| }; |
| fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, |
| fc_tgtid_binding_type_names) |
| fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, |
| fc_tgtid_binding_type_names) |
| #define FC_BINDTYPE_MAX_NAMELEN 30 |
| |
| |
| #define fc_bitfield_name_search(title, table) \ |
| static ssize_t \ |
| get_fc_##title##_names(u32 table_key, char *buf) \ |
| { \ |
| char *prefix = ""; \ |
| ssize_t len = 0; \ |
| int i; \ |
| \ |
| for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
| if (table[i].value & table_key) { \ |
| len += sprintf(buf + len, "%s%s", \ |
| prefix, table[i].name); \ |
| prefix = ", "; \ |
| } \ |
| } \ |
| len += sprintf(buf + len, "\n"); \ |
| return len; \ |
| } |
| |
| |
| /* Convert FC_COS bit values to ascii string name */ |
| static const struct { |
| u32 value; |
| char *name; |
| } fc_cos_names[] = { |
| { FC_COS_CLASS1, "Class 1" }, |
| { FC_COS_CLASS2, "Class 2" }, |
| { FC_COS_CLASS3, "Class 3" }, |
| { FC_COS_CLASS4, "Class 4" }, |
| { FC_COS_CLASS6, "Class 6" }, |
| }; |
| fc_bitfield_name_search(cos, fc_cos_names) |
| |
| |
| /* Convert FC_PORTSPEED bit values to ascii string name */ |
| static const struct { |
| u32 value; |
| char *name; |
| } fc_port_speed_names[] = { |
| { FC_PORTSPEED_1GBIT, "1 Gbit" }, |
| { FC_PORTSPEED_2GBIT, "2 Gbit" }, |
| { FC_PORTSPEED_4GBIT, "4 Gbit" }, |
| { FC_PORTSPEED_10GBIT, "10 Gbit" }, |
| { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, |
| }; |
| fc_bitfield_name_search(port_speed, fc_port_speed_names) |
| |
| |
| static int |
| show_fc_fc4s (char *buf, u8 *fc4_list) |
| { |
| int i, len=0; |
| |
| for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) |
| len += sprintf(buf + len , "0x%02x ", *fc4_list); |
| len += sprintf(buf + len, "\n"); |
| return len; |
| } |
| |
| |
| /* Convert FC_RPORT_ROLE bit values to ascii string name */ |
| static const struct { |
| u32 value; |
| char *name; |
| } fc_remote_port_role_names[] = { |
| { FC_RPORT_ROLE_FCP_TARGET, "FCP Target" }, |
| { FC_RPORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, |
| { FC_RPORT_ROLE_IP_PORT, "IP Port" }, |
| }; |
| fc_bitfield_name_search(remote_port_roles, fc_remote_port_role_names) |
| |
| /* |
| * Define roles that are specific to port_id. Values are relative to ROLE_MASK. |
| */ |
| #define FC_WELLKNOWN_PORTID_MASK 0xfffff0 |
| #define FC_WELLKNOWN_ROLE_MASK 0x00000f |
| #define FC_FPORT_PORTID 0x00000e |
| #define FC_FABCTLR_PORTID 0x00000d |
| #define FC_DIRSRVR_PORTID 0x00000c |
| #define FC_TIMESRVR_PORTID 0x00000b |
| #define FC_MGMTSRVR_PORTID 0x00000a |
| |
| |
| static void fc_timeout_deleted_rport(void *data); |
| static void fc_scsi_scan_rport(void *data); |
| |
| /* |
| * Attribute counts pre object type... |
| * Increase these values if you add attributes |
| */ |
| #define FC_STARGET_NUM_ATTRS 3 |
| #define FC_RPORT_NUM_ATTRS 9 |
| #define FC_HOST_NUM_ATTRS 17 |
| |
| struct fc_internal { |
| struct scsi_transport_template t; |
| struct fc_function_template *f; |
| |
| /* |
| * For attributes : each object has : |
| * An array of the actual attributes structures |
| * An array of null-terminated pointers to the attribute |
| * structures - used for mid-layer interaction. |
| * |
| * The attribute containers for the starget and host are are |
| * part of the midlayer. As the remote port is specific to the |
| * fc transport, we must provide the attribute container. |
| */ |
| struct class_device_attribute private_starget_attrs[ |
| FC_STARGET_NUM_ATTRS]; |
| struct class_device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; |
| |
| struct class_device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; |
| struct class_device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; |
| |
| struct transport_container rport_attr_cont; |
| struct class_device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; |
| struct class_device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; |
| }; |
| |
| #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) |
| |
| static int fc_target_setup(struct transport_container *tc, struct device *dev, |
| struct class_device *cdev) |
| { |
| struct scsi_target *starget = to_scsi_target(dev); |
| struct fc_rport *rport = starget_to_rport(starget); |
| |
| /* |
| * if parent is remote port, use values from remote port. |
| * Otherwise, this host uses the fc_transport, but not the |
| * remote port interface. As such, initialize to known non-values. |
| */ |
| if (rport) { |
| fc_starget_node_name(starget) = rport->node_name; |
| fc_starget_port_name(starget) = rport->port_name; |
| fc_starget_port_id(starget) = rport->port_id; |
| } else { |
| fc_starget_node_name(starget) = -1; |
| fc_starget_port_name(starget) = -1; |
| fc_starget_port_id(starget) = -1; |
| } |
| |
| return 0; |
| } |
| |
| static DECLARE_TRANSPORT_CLASS(fc_transport_class, |
| "fc_transport", |
| fc_target_setup, |
| NULL, |
| NULL); |
| |
| static int fc_host_setup(struct transport_container *tc, struct device *dev, |
| struct class_device *cdev) |
| { |
| struct Scsi_Host *shost = dev_to_shost(dev); |
| struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
| |
| /* |
| * Set default values easily detected by the midlayer as |
| * failure cases. The scsi lldd is responsible for initializing |
| * all transport attributes to valid values per host. |
| */ |
| fc_host->node_name = -1; |
| fc_host->port_name = -1; |
| fc_host->permanent_port_name = -1; |
| fc_host->supported_classes = FC_COS_UNSPECIFIED; |
| memset(fc_host->supported_fc4s, 0, |
| sizeof(fc_host->supported_fc4s)); |
| memset(fc_host->symbolic_name, 0, |
| sizeof(fc_host->symbolic_name)); |
| fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN; |
| fc_host->maxframe_size = -1; |
| memset(fc_host->serial_number, 0, |
| sizeof(fc_host->serial_number)); |
| |
| fc_host->port_id = -1; |
| fc_host->port_type = FC_PORTTYPE_UNKNOWN; |
| fc_host->port_state = FC_PORTSTATE_UNKNOWN; |
| memset(fc_host->active_fc4s, 0, |
| sizeof(fc_host->active_fc4s)); |
| fc_host->speed = FC_PORTSPEED_UNKNOWN; |
| fc_host->fabric_name = -1; |
| |
| fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; |
| |
| INIT_LIST_HEAD(&fc_host->rports); |
| INIT_LIST_HEAD(&fc_host->rport_bindings); |
| fc_host->next_rport_number = 0; |
| fc_host->next_target_id = 0; |
| |
| snprintf(fc_host->work_q_name, KOBJ_NAME_LEN, "fc_wq_%d", |
| shost->host_no); |
| fc_host->work_q = create_singlethread_workqueue( |
| fc_host->work_q_name); |
| if (!fc_host->work_q) |
| return -ENOMEM; |
| |
| snprintf(fc_host->devloss_work_q_name, KOBJ_NAME_LEN, "fc_dl_%d", |
| shost->host_no); |
| fc_host->devloss_work_q = create_singlethread_workqueue( |
| fc_host->devloss_work_q_name); |
| if (!fc_host->devloss_work_q) { |
| destroy_workqueue(fc_host->work_q); |
| fc_host->work_q = NULL; |
| return -ENOMEM; |
| } |
| |
| return 0; |
| } |
| |
| static DECLARE_TRANSPORT_CLASS(fc_host_class, |
| "fc_host", |
| fc_host_setup, |
| NULL, |
| 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); |
| |
| /* |
| * Module Parameters |
| */ |
| |
| /* |
| * dev_loss_tmo: the default number of seconds that the FC transport |
| * should insulate the loss of a remote port. |
| * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. |
| */ |
| static unsigned int fc_dev_loss_tmo = SCSI_DEVICE_BLOCK_MAX_TIMEOUT; |
| |
| module_param_named(dev_loss_tmo, fc_dev_loss_tmo, int, S_IRUGO|S_IWUSR); |
| MODULE_PARM_DESC(dev_loss_tmo, |
| "Maximum number of seconds that the FC transport should" |
| " insulate the loss of a remote port. Once this value is" |
| " exceeded, the scsi target is removed. Value should be" |
| " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT."); |
| |
| |
| static __init int fc_transport_init(void) |
| { |
| int error = transport_class_register(&fc_host_class); |
| if (error) |
| return error; |
| error = transport_class_register(&fc_rport_class); |
| if (error) |
| return error; |
| return transport_class_register(&fc_transport_class); |
| } |
| |
| static void __exit fc_transport_exit(void) |
| { |
| transport_class_unregister(&fc_transport_class); |
| transport_class_unregister(&fc_rport_class); |
| transport_class_unregister(&fc_host_class); |
| } |
| |
| /* |
| * FC Remote Port Attribute Management |
| */ |
| |
| #define fc_rport_show_function(field, format_string, sz, cast) \ |
| static ssize_t \ |
| show_fc_rport_##field (struct class_device *cdev, char *buf) \ |
| { \ |
| struct fc_rport *rport = transport_class_to_rport(cdev); \ |
| struct Scsi_Host *shost = rport_to_shost(rport); \ |
| struct fc_internal *i = to_fc_internal(shost->transportt); \ |
| if ((i->f->get_rport_##field) && \ |
| !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ |
| (rport->port_state == FC_PORTSTATE_DELETED) || \ |
| (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ |
| i->f->get_rport_##field(rport); \ |
| return snprintf(buf, sz, format_string, cast rport->field); \ |
| } |
| |
| #define fc_rport_store_function(field) \ |
| static ssize_t \ |
| store_fc_rport_##field(struct class_device *cdev, const char *buf, \ |
| size_t count) \ |
| { \ |
| int val; \ |
| struct fc_rport *rport = transport_class_to_rport(cdev); \ |
| struct Scsi_Host *shost = rport_to_shost(rport); \ |
| struct fc_internal *i = to_fc_internal(shost->transportt); \ |
| 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, NULL, 0); \ |
| i->f->set_rport_##field(rport, val); \ |
| return count; \ |
| } |
| |
| #define fc_rport_rd_attr(field, format_string, sz) \ |
| fc_rport_show_function(field, format_string, sz, ) \ |
| static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ |
| show_fc_rport_##field, NULL) |
| |
| #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ |
| fc_rport_show_function(field, format_string, sz, (cast)) \ |
| static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ |
| show_fc_rport_##field, NULL) |
| |
| #define fc_rport_rw_attr(field, format_string, sz) \ |
| fc_rport_show_function(field, format_string, sz, ) \ |
| fc_rport_store_function(field) \ |
| static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ |
| show_fc_rport_##field, \ |
| store_fc_rport_##field) |
| |
| |
| #define fc_private_rport_show_function(field, format_string, sz, cast) \ |
| static ssize_t \ |
| show_fc_rport_##field (struct class_device *cdev, char *buf) \ |
| { \ |
| struct fc_rport *rport = transport_class_to_rport(cdev); \ |
| return snprintf(buf, sz, format_string, cast rport->field); \ |
| } |
| |
| #define fc_private_rport_rd_attr(field, format_string, sz) \ |
| fc_private_rport_show_function(field, format_string, sz, ) \ |
| static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ |
| show_fc_rport_##field, NULL) |
| |
| #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ |
| fc_private_rport_show_function(field, format_string, sz, (cast)) \ |
| static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ |
| show_fc_rport_##field, NULL) |
| |
| |
| #define fc_private_rport_rd_enum_attr(title, maxlen) \ |
| static ssize_t \ |
| show_fc_rport_##title (struct class_device *cdev, char *buf) \ |
| { \ |
| struct fc_rport *rport = transport_class_to_rport(cdev); \ |
| const char *name; \ |
| name = get_fc_##title##_name(rport->title); \ |
| if (!name) \ |
| return -EINVAL; \ |
| return snprintf(buf, maxlen, "%s\n", name); \ |
| } \ |
| static FC_CLASS_DEVICE_ATTR(rport, title, S_IRUGO, \ |
| show_fc_rport_##title, NULL) |
| |
| |
| #define SETUP_RPORT_ATTRIBUTE_RD(field) \ |
| i->private_rport_attrs[count] = class_device_attr_rport_##field; \ |
| i->private_rport_attrs[count].attr.mode = S_IRUGO; \ |
| i->private_rport_attrs[count].store = NULL; \ |
| i->rport_attrs[count] = &i->private_rport_attrs[count]; \ |
| if (i->f->show_rport_##field) \ |
| count++ |
| |
| #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ |
| i->private_rport_attrs[count] = class_device_attr_rport_##field; \ |
| i->private_rport_attrs[count].attr.mode = S_IRUGO; \ |
| i->private_rport_attrs[count].store = NULL; \ |
| i->rport_attrs[count] = &i->private_rport_attrs[count]; \ |
| count++ |
| |
| #define SETUP_RPORT_ATTRIBUTE_RW(field) \ |
| i->private_rport_attrs[count] = class_device_attr_rport_##field; \ |
| if (!i->f->set_rport_##field) { \ |
| i->private_rport_attrs[count].attr.mode = S_IRUGO; \ |
| i->private_rport_attrs[count].store = NULL; \ |
| } \ |
| i->rport_attrs[count] = &i->private_rport_attrs[count]; \ |
| if (i->f->show_rport_##field) \ |
| count++ |
| |
| |
| /* The FC Transport Remote Port Attributes: */ |
| |
| /* Fixed Remote Port Attributes */ |
| |
| fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); |
| |
| static ssize_t |
| show_fc_rport_supported_classes (struct class_device *cdev, char *buf) |
| { |
| struct fc_rport *rport = transport_class_to_rport(cdev); |
| if (rport->supported_classes == FC_COS_UNSPECIFIED) |
| return snprintf(buf, 20, "unspecified\n"); |
| return get_fc_cos_names(rport->supported_classes, buf); |
| } |
| static FC_CLASS_DEVICE_ATTR(rport, supported_classes, S_IRUGO, |
| show_fc_rport_supported_classes, NULL); |
| |
| /* Dynamic Remote Port Attributes */ |
| |
| /* |
| * dev_loss_tmo attribute |
| */ |
| fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) |
| static ssize_t |
| store_fc_rport_dev_loss_tmo(struct class_device *cdev, const char *buf, |
| size_t count) |
| { |
| int val; |
| struct fc_rport *rport = transport_class_to_rport(cdev); |
| struct Scsi_Host *shost = rport_to_shost(rport); |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| 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, NULL, 0); |
| if ((val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) |
| return -EINVAL; |
| i->f->set_rport_dev_loss_tmo(rport, val); |
| return count; |
| } |
| static FC_CLASS_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, |
| show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); |
| |
| |
| /* Private Remote Port Attributes */ |
| |
| fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); |
| fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); |
| fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); |
| |
| static ssize_t |
| show_fc_rport_roles (struct class_device *cdev, char *buf) |
| { |
| struct fc_rport *rport = transport_class_to_rport(cdev); |
| |
| /* identify any roles that are port_id specific */ |
| if ((rport->port_id != -1) && |
| (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == |
| FC_WELLKNOWN_PORTID_MASK) { |
| switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { |
| case FC_FPORT_PORTID: |
| return snprintf(buf, 30, "Fabric Port\n"); |
| case FC_FABCTLR_PORTID: |
| return snprintf(buf, 30, "Fabric Controller\n"); |
| case FC_DIRSRVR_PORTID: |
| return snprintf(buf, 30, "Directory Server\n"); |
| case FC_TIMESRVR_PORTID: |
| return snprintf(buf, 30, "Time Server\n"); |
| case FC_MGMTSRVR_PORTID: |
| return snprintf(buf, 30, "Management Server\n"); |
| default: |
| return snprintf(buf, 30, "Unknown Fabric Entity\n"); |
| } |
| } else { |
| if (rport->roles == FC_RPORT_ROLE_UNKNOWN) |
| return snprintf(buf, 20, "unknown\n"); |
| return get_fc_remote_port_roles_names(rport->roles, buf); |
| } |
| } |
| static FC_CLASS_DEVICE_ATTR(rport, roles, S_IRUGO, |
| show_fc_rport_roles, NULL); |
| |
| fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); |
| fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); |
| |
| |
| |
| /* |
| * FC SCSI Target Attribute Management |
| */ |
| |
| /* |
| * Note: in the target show function we recognize when the remote |
| * port is in the heirarchy and do not allow the driver to get |
| * involved in sysfs functions. The driver only gets involved if |
| * it's the "old" style that doesn't use rports. |
| */ |
| #define fc_starget_show_function(field, format_string, sz, cast) \ |
| static ssize_t \ |
| show_fc_starget_##field (struct class_device *cdev, char *buf) \ |
| { \ |
| struct scsi_target *starget = transport_class_to_starget(cdev); \ |
| struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
| struct fc_internal *i = to_fc_internal(shost->transportt); \ |
| struct fc_rport *rport = starget_to_rport(starget); \ |
| if (rport) \ |
| fc_starget_##field(starget) = rport->field; \ |
| else if (i->f->get_starget_##field) \ |
| i->f->get_starget_##field(starget); \ |
| return snprintf(buf, sz, format_string, \ |
| cast fc_starget_##field(starget)); \ |
| } |
| |
| #define fc_starget_rd_attr(field, format_string, sz) \ |
| fc_starget_show_function(field, format_string, sz, ) \ |
| static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \ |
| show_fc_starget_##field, NULL) |
| |
| #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ |
| fc_starget_show_function(field, format_string, sz, (cast)) \ |
| static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \ |
| show_fc_starget_##field, NULL) |
| |
| #define SETUP_STARGET_ATTRIBUTE_RD(field) \ |
| i->private_starget_attrs[count] = class_device_attr_starget_##field; \ |
| i->private_starget_attrs[count].attr.mode = S_IRUGO; \ |
| i->private_starget_attrs[count].store = NULL; \ |
| i->starget_attrs[count] = &i->private_starget_attrs[count]; \ |
| if (i->f->show_starget_##field) \ |
| count++ |
| |
| #define SETUP_STARGET_ATTRIBUTE_RW(field) \ |
| i->private_starget_attrs[count] = class_device_attr_starget_##field; \ |
| if (!i->f->set_starget_##field) { \ |
| i->private_starget_attrs[count].attr.mode = S_IRUGO; \ |
| i->private_starget_attrs[count].store = NULL; \ |
| } \ |
| i->starget_attrs[count] = &i->private_starget_attrs[count]; \ |
| if (i->f->show_starget_##field) \ |
| count++ |
| |
| /* The FC Transport SCSI Target Attributes: */ |
| fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); |
| fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); |
| fc_starget_rd_attr(port_id, "0x%06x\n", 20); |
| |
| |
| /* |
| * Host Attribute Management |
| */ |
| |
| #define fc_host_show_function(field, format_string, sz, cast) \ |
| static ssize_t \ |
| show_fc_host_##field (struct class_device *cdev, char *buf) \ |
| { \ |
| struct Scsi_Host *shost = transport_class_to_shost(cdev); \ |
| struct fc_internal *i = to_fc_internal(shost->transportt); \ |
| if (i->f->get_host_##field) \ |
| i->f->get_host_##field(shost); \ |
| return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ |
| } |
| |
| #define fc_host_store_function(field) \ |
| static ssize_t \ |
| store_fc_host_##field(struct class_device *cdev, const char *buf, \ |
| size_t count) \ |
| { \ |
| int val; \ |
| struct Scsi_Host *shost = transport_class_to_shost(cdev); \ |
| struct fc_internal *i = to_fc_internal(shost->transportt); \ |
| \ |
| val = simple_strtoul(buf, NULL, 0); \ |
| i->f->set_host_##field(shost, val); \ |
| return count; \ |
| } |
| |
| #define fc_host_rd_attr(field, format_string, sz) \ |
| fc_host_show_function(field, format_string, sz, ) \ |
| static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ |
| show_fc_host_##field, NULL) |
| |
| #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ |
| fc_host_show_function(field, format_string, sz, (cast)) \ |
| static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ |
| show_fc_host_##field, NULL) |
| |
| #define fc_host_rw_attr(field, format_string, sz) \ |
| fc_host_show_function(field, format_string, sz, ) \ |
| fc_host_store_function(field) \ |
| static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ |
| show_fc_host_##field, \ |
| store_fc_host_##field) |
| |
| #define fc_host_rd_enum_attr(title, maxlen) \ |
| static ssize_t \ |
| show_fc_host_##title (struct class_device *cdev, char *buf) \ |
| { \ |
| struct Scsi_Host *shost = transport_class_to_shost(cdev); \ |
| struct fc_internal *i = to_fc_internal(shost->transportt); \ |
| const char *name; \ |
| if (i->f->get_host_##title) \ |
| i->f->get_host_##title(shost); \ |
| name = get_fc_##title##_name(fc_host_##title(shost)); \ |
| if (!name) \ |
| return -EINVAL; \ |
| return snprintf(buf, maxlen, "%s\n", name); \ |
| } \ |
| static FC_CLASS_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) |
| |
| #define SETUP_HOST_ATTRIBUTE_RD(field) \ |
| i->private_host_attrs[count] = class_device_attr_host_##field; \ |
| i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
| i->private_host_attrs[count].store = NULL; \ |
| i->host_attrs[count] = &i->private_host_attrs[count]; \ |
| if (i->f->show_host_##field) \ |
| count++ |
| |
| #define SETUP_HOST_ATTRIBUTE_RW(field) \ |
| i->private_host_attrs[count] = class_device_attr_host_##field; \ |
| if (!i->f->set_host_##field) { \ |
| i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
| i->private_host_attrs[count].store = NULL; \ |
| } \ |
| i->host_attrs[count] = &i->private_host_attrs[count]; \ |
| if (i->f->show_host_##field) \ |
| count++ |
| |
| |
| #define fc_private_host_show_function(field, format_string, sz, cast) \ |
| static ssize_t \ |
| show_fc_host_##field (struct class_device *cdev, char *buf) \ |
| { \ |
| struct Scsi_Host *shost = transport_class_to_shost(cdev); \ |
| return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ |
| } |
| |
| #define fc_private_host_rd_attr(field, format_string, sz) \ |
| fc_private_host_show_function(field, format_string, sz, ) \ |
| static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ |
| show_fc_host_##field, NULL) |
| |
| #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ |
| fc_private_host_show_function(field, format_string, sz, (cast)) \ |
| static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ |
| show_fc_host_##field, NULL) |
| |
| #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ |
| i->private_host_attrs[count] = class_device_attr_host_##field; \ |
| i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
| i->private_host_attrs[count].store = NULL; \ |
| i->host_attrs[count] = &i->private_host_attrs[count]; \ |
| count++ |
| |
| #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ |
| { \ |
| i->private_host_attrs[count] = class_device_attr_host_##field; \ |
| i->host_attrs[count] = &i->private_host_attrs[count]; \ |
| count++; \ |
| } |
| |
| |
| /* Fixed Host Attributes */ |
| |
| static ssize_t |
| show_fc_host_supported_classes (struct class_device *cdev, char *buf) |
| { |
| struct Scsi_Host *shost = transport_class_to_shost(cdev); |
| |
| if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) |
| return snprintf(buf, 20, "unspecified\n"); |
| |
| return get_fc_cos_names(fc_host_supported_classes(shost), buf); |
| } |
| static FC_CLASS_DEVICE_ATTR(host, supported_classes, S_IRUGO, |
| show_fc_host_supported_classes, NULL); |
| |
| static ssize_t |
| show_fc_host_supported_fc4s (struct class_device *cdev, char *buf) |
| { |
| struct Scsi_Host *shost = transport_class_to_shost(cdev); |
| return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); |
| } |
| static FC_CLASS_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, |
| show_fc_host_supported_fc4s, NULL); |
| |
| static ssize_t |
| show_fc_host_supported_speeds (struct class_device *cdev, char *buf) |
| { |
| struct Scsi_Host *shost = transport_class_to_shost(cdev); |
| |
| if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) |
| return snprintf(buf, 20, "unknown\n"); |
| |
| return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); |
| } |
| static FC_CLASS_DEVICE_ATTR(host, supported_speeds, S_IRUGO, |
| show_fc_host_supported_speeds, NULL); |
| |
| |
| fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); |
| fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); |
| fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, |
| unsigned long long); |
| fc_private_host_rd_attr(symbolic_name, "%s\n", (FC_SYMBOLIC_NAME_SIZE +1)); |
| fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); |
| fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); |
| |
| |
| /* Dynamic Host Attributes */ |
| |
| static ssize_t |
| show_fc_host_active_fc4s (struct class_device *cdev, char *buf) |
| { |
| struct Scsi_Host *shost = transport_class_to_shost(cdev); |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| |
| if (i->f->get_host_active_fc4s) |
| i->f->get_host_active_fc4s(shost); |
| |
| return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); |
| } |
| static FC_CLASS_DEVICE_ATTR(host, active_fc4s, S_IRUGO, |
| show_fc_host_active_fc4s, NULL); |
| |
| static ssize_t |
| show_fc_host_speed (struct class_device *cdev, char *buf) |
| { |
| struct Scsi_Host *shost = transport_class_to_shost(cdev); |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| |
| if (i->f->get_host_speed) |
| i->f->get_host_speed(shost); |
| |
| if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) |
| return snprintf(buf, 20, "unknown\n"); |
| |
| return get_fc_port_speed_names(fc_host_speed(shost), buf); |
| } |
| static FC_CLASS_DEVICE_ATTR(host, speed, S_IRUGO, |
| show_fc_host_speed, NULL); |
| |
| |
| fc_host_rd_attr(port_id, "0x%06x\n", 20); |
| fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); |
| fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); |
| fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); |
| |
| |
| /* Private Host Attributes */ |
| |
| static ssize_t |
| show_fc_private_host_tgtid_bind_type(struct class_device *cdev, char *buf) |
| { |
| struct Scsi_Host *shost = transport_class_to_shost(cdev); |
| const char *name; |
| |
| name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); |
| if (!name) |
| return -EINVAL; |
| return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); |
| } |
| |
| #define get_list_head_entry(pos, head, member) \ |
| pos = list_entry((head)->next, typeof(*pos), member) |
| |
| static ssize_t |
| store_fc_private_host_tgtid_bind_type(struct class_device *cdev, |
| const char *buf, size_t count) |
| { |
| struct Scsi_Host *shost = transport_class_to_shost(cdev); |
| struct fc_rport *rport; |
| enum fc_tgtid_binding_type val; |
| unsigned long flags; |
| |
| if (get_fc_tgtid_bind_type_match(buf, &val)) |
| return -EINVAL; |
| |
| /* if changing bind type, purge all unused consistent bindings */ |
| if (val != fc_host_tgtid_bind_type(shost)) { |
| spin_lock_irqsave(shost->host_lock, flags); |
| while (!list_empty(&fc_host_rport_bindings(shost))) { |
| get_list_head_entry(rport, |
| &fc_host_rport_bindings(shost), peers); |
| list_del(&rport->peers); |
| rport->port_state = FC_PORTSTATE_DELETED; |
| fc_queue_work(shost, &rport->rport_delete_work); |
| } |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| } |
| |
| fc_host_tgtid_bind_type(shost) = val; |
| return count; |
| } |
| |
| static FC_CLASS_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, |
| show_fc_private_host_tgtid_bind_type, |
| store_fc_private_host_tgtid_bind_type); |
| |
| static ssize_t |
| store_fc_private_host_issue_lip(struct class_device *cdev, |
| const char *buf, size_t count) |
| { |
| struct Scsi_Host *shost = transport_class_to_shost(cdev); |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| int ret; |
| |
| /* ignore any data value written to the attribute */ |
| if (i->f->issue_fc_host_lip) { |
| ret = i->f->issue_fc_host_lip(shost); |
| return ret ? ret: count; |
| } |
| |
| return -ENOENT; |
| } |
| |
| static FC_CLASS_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, |
| store_fc_private_host_issue_lip); |
| |
| /* |
| * Host Statistics Management |
| */ |
| |
| /* Show a given an attribute in the statistics group */ |
| static ssize_t |
| fc_stat_show(const struct class_device *cdev, char *buf, unsigned long offset) |
| { |
| struct Scsi_Host *shost = transport_class_to_shost(cdev); |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| struct fc_host_statistics *stats; |
| ssize_t ret = -ENOENT; |
| |
| if (offset > sizeof(struct fc_host_statistics) || |
| offset % sizeof(u64) != 0) |
| WARN_ON(1); |
| |
| if (i->f->get_fc_host_stats) { |
| stats = (i->f->get_fc_host_stats)(shost); |
| if (stats) |
| ret = snprintf(buf, 20, "0x%llx\n", |
| (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); |
| } |
| return ret; |
| } |
| |
| |
| /* generate a read-only statistics attribute */ |
| #define fc_host_statistic(name) \ |
| static ssize_t show_fcstat_##name(struct class_device *cd, char *buf) \ |
| { \ |
| return fc_stat_show(cd, buf, \ |
| offsetof(struct fc_host_statistics, name)); \ |
| } \ |
| static FC_CLASS_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) |
| |
| fc_host_statistic(seconds_since_last_reset); |
| fc_host_statistic(tx_frames); |
| fc_host_statistic(tx_words); |
| fc_host_statistic(rx_frames); |
| fc_host_statistic(rx_words); |
| fc_host_statistic(lip_count); |
| fc_host_statistic(nos_count); |
| fc_host_statistic(error_frames); |
| fc_host_statistic(dumped_frames); |
| fc_host_statistic(link_failure_count); |
| fc_host_statistic(loss_of_sync_count); |
| fc_host_statistic(loss_of_signal_count); |
| fc_host_statistic(prim_seq_protocol_err_count); |
| fc_host_statistic(invalid_tx_word_count); |
| fc_host_statistic(invalid_crc_count); |
| fc_host_statistic(fcp_input_requests); |
| fc_host_statistic(fcp_output_requests); |
| fc_host_statistic(fcp_control_requests); |
| fc_host_statistic(fcp_input_megabytes); |
| fc_host_statistic(fcp_output_megabytes); |
| |
| static ssize_t |
| fc_reset_statistics(struct class_device *cdev, const char *buf, |
| size_t count) |
| { |
| struct Scsi_Host *shost = transport_class_to_shost(cdev); |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| |
| /* ignore any data value written to the attribute */ |
| if (i->f->reset_fc_host_stats) { |
| i->f->reset_fc_host_stats(shost); |
| return count; |
| } |
| |
| return -ENOENT; |
| } |
| static FC_CLASS_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, |
| fc_reset_statistics); |
| |
| |
| static struct attribute *fc_statistics_attrs[] = { |
| &class_device_attr_host_seconds_since_last_reset.attr, |
| &class_device_attr_host_tx_frames.attr, |
| &class_device_attr_host_tx_words.attr, |
| &class_device_attr_host_rx_frames.attr, |
| &class_device_attr_host_rx_words.attr, |
| &class_device_attr_host_lip_count.attr, |
| &class_device_attr_host_nos_count.attr, |
| &class_device_attr_host_error_frames.attr, |
| &class_device_attr_host_dumped_frames.attr, |
| &class_device_attr_host_link_failure_count.attr, |
| &class_device_attr_host_loss_of_sync_count.attr, |
| &class_device_attr_host_loss_of_signal_count.attr, |
| &class_device_attr_host_prim_seq_protocol_err_count.attr, |
| &class_device_attr_host_invalid_tx_word_count.attr, |
| &class_device_attr_host_invalid_crc_count.attr, |
| &class_device_attr_host_fcp_input_requests.attr, |
| &class_device_attr_host_fcp_output_requests.attr, |
| &class_device_attr_host_fcp_control_requests.attr, |
| &class_device_attr_host_fcp_input_megabytes.attr, |
| &class_device_attr_host_fcp_output_megabytes.attr, |
| &class_device_attr_host_reset_statistics.attr, |
| NULL |
| }; |
| |
| static struct attribute_group fc_statistics_group = { |
| .name = "statistics", |
| .attrs = fc_statistics_attrs, |
| }; |
| |
| static int fc_host_match(struct attribute_container *cont, |
| struct device *dev) |
| { |
| struct Scsi_Host *shost; |
| struct fc_internal *i; |
| |
| if (!scsi_is_host_device(dev)) |
| return 0; |
| |
| shost = dev_to_shost(dev); |
| if (!shost->transportt || shost->transportt->host_attrs.ac.class |
| != &fc_host_class.class) |
| return 0; |
| |
| i = to_fc_internal(shost->transportt); |
| |
| return &i->t.host_attrs.ac == cont; |
| } |
| |
| static int fc_target_match(struct attribute_container *cont, |
| struct device *dev) |
| { |
| struct Scsi_Host *shost; |
| struct fc_internal *i; |
| |
| if (!scsi_is_target_device(dev)) |
| return 0; |
| |
| shost = dev_to_shost(dev->parent); |
| if (!shost->transportt || shost->transportt->host_attrs.ac.class |
| != &fc_host_class.class) |
| return 0; |
| |
| i = to_fc_internal(shost->transportt); |
| |
| return &i->t.target_attrs.ac == cont; |
| } |
| |
| static void fc_rport_dev_release(struct device *dev) |
| { |
| struct fc_rport *rport = dev_to_rport(dev); |
| put_device(dev->parent); |
| kfree(rport); |
| } |
| |
| int scsi_is_fc_rport(const struct device *dev) |
| { |
| return dev->release == fc_rport_dev_release; |
| } |
| EXPORT_SYMBOL(scsi_is_fc_rport); |
| |
| static int fc_rport_match(struct attribute_container *cont, |
| struct device *dev) |
| { |
| struct Scsi_Host *shost; |
| struct fc_internal *i; |
| |
| if (!scsi_is_fc_rport(dev)) |
| return 0; |
| |
| shost = dev_to_shost(dev->parent); |
| if (!shost->transportt || shost->transportt->host_attrs.ac.class |
| != &fc_host_class.class) |
| return 0; |
| |
| i = to_fc_internal(shost->transportt); |
| |
| return &i->rport_attr_cont.ac == cont; |
| } |
| |
| |
| /** |
| * fc_timed_out - FC Transport I/O timeout intercept handler |
| * |
| * @scmd: The SCSI command which timed out |
| * |
| * This routine protects against error handlers getting invoked while a |
| * rport is in a blocked state, typically due to a temporarily loss of |
| * connectivity. If the error handlers are allowed to proceed, requests |
| * to abort i/o, reset the target, etc will likely fail as there is no way |
| * to communicate with the device to perform the requested function. These |
| * failures may result in the midlayer taking the device offline, requiring |
| * manual intervention to restore operation. |
| * |
| * This routine, called whenever an i/o times out, validates the state of |
| * the underlying rport. If the rport is blocked, it returns |
| * EH_RESET_TIMER, which will continue to reschedule the timeout. |
| * Eventually, either the device will return, or devloss_tmo will fire, |
| * and when the timeout then fires, it will be handled normally. |
| * If the rport is not blocked, normal error handling continues. |
| * |
| * Notes: |
| * This routine assumes no locks are held on entry. |
| **/ |
| static enum scsi_eh_timer_return |
| fc_timed_out(struct scsi_cmnd *scmd) |
| { |
| struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); |
| |
| if (rport->port_state == FC_PORTSTATE_BLOCKED) |
| return EH_RESET_TIMER; |
| |
| return EH_NOT_HANDLED; |
| } |
| |
| /* |
| * Must be called with shost->host_lock held |
| */ |
| static int fc_user_scan(struct Scsi_Host *shost, uint channel, |
| uint id, uint lun) |
| { |
| struct fc_rport *rport; |
| |
| list_for_each_entry(rport, &fc_host_rports(shost), peers) { |
| if (rport->scsi_target_id == -1) |
| continue; |
| |
| if ((channel == SCAN_WILD_CARD || channel == rport->channel) && |
| (id == SCAN_WILD_CARD || id == rport->scsi_target_id)) { |
| scsi_scan_target(&rport->dev, rport->channel, |
| rport->scsi_target_id, lun, 1); |
| } |
| } |
| |
| return 0; |
| } |
| |
| struct scsi_transport_template * |
| fc_attach_transport(struct fc_function_template *ft) |
| { |
| int count; |
| struct fc_internal *i = kzalloc(sizeof(struct fc_internal), |
| GFP_KERNEL); |
| |
| if (unlikely(!i)) |
| return NULL; |
| |
| i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; |
| i->t.target_attrs.ac.class = &fc_transport_class.class; |
| i->t.target_attrs.ac.match = fc_target_match; |
| i->t.target_size = sizeof(struct fc_starget_attrs); |
| transport_container_register(&i->t.target_attrs); |
| |
| i->t.host_attrs.ac.attrs = &i->host_attrs[0]; |
| i->t.host_attrs.ac.class = &fc_host_class.class; |
| i->t.host_attrs.ac.match = fc_host_match; |
| i->t.host_size = sizeof(struct fc_host_attrs); |
| if (ft->get_fc_host_stats) |
| i->t.host_attrs.statistics = &fc_statistics_group; |
| transport_container_register(&i->t.host_attrs); |
| |
| i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; |
| i->rport_attr_cont.ac.class = &fc_rport_class.class; |
| i->rport_attr_cont.ac.match = fc_rport_match; |
| transport_container_register(&i->rport_attr_cont); |
| |
| i->f = ft; |
| |
| /* Transport uses the shost workq for scsi scanning */ |
| i->t.create_work_queue = 1; |
| |
| i->t.eh_timed_out = fc_timed_out; |
| |
| i->t.user_scan = fc_user_scan; |
| |
| /* |
| * Setup SCSI Target Attributes. |
| */ |
| count = 0; |
| SETUP_STARGET_ATTRIBUTE_RD(node_name); |
| SETUP_STARGET_ATTRIBUTE_RD(port_name); |
| SETUP_STARGET_ATTRIBUTE_RD(port_id); |
| |
| BUG_ON(count > FC_STARGET_NUM_ATTRS); |
| |
| i->starget_attrs[count] = NULL; |
| |
| |
| /* |
| * Setup SCSI Host Attributes. |
| */ |
| count=0; |
| SETUP_HOST_ATTRIBUTE_RD(node_name); |
| SETUP_HOST_ATTRIBUTE_RD(port_name); |
| SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); |
| SETUP_HOST_ATTRIBUTE_RD(supported_classes); |
| SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); |
| SETUP_HOST_ATTRIBUTE_RD(symbolic_name); |
| SETUP_HOST_ATTRIBUTE_RD(supported_speeds); |
| SETUP_HOST_ATTRIBUTE_RD(maxframe_size); |
| SETUP_HOST_ATTRIBUTE_RD(serial_number); |
| |
| SETUP_HOST_ATTRIBUTE_RD(port_id); |
| SETUP_HOST_ATTRIBUTE_RD(port_type); |
| SETUP_HOST_ATTRIBUTE_RD(port_state); |
| SETUP_HOST_ATTRIBUTE_RD(active_fc4s); |
| SETUP_HOST_ATTRIBUTE_RD(speed); |
| SETUP_HOST_ATTRIBUTE_RD(fabric_name); |
| |
| /* Transport-managed attributes */ |
| SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); |
| if (ft->issue_fc_host_lip) |
| SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); |
| |
| BUG_ON(count > FC_HOST_NUM_ATTRS); |
| |
| i->host_attrs[count] = NULL; |
| |
| /* |
| * Setup Remote Port Attributes. |
| */ |
| count=0; |
| SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); |
| SETUP_RPORT_ATTRIBUTE_RD(supported_classes); |
| SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); |
| SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); |
| SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); |
| SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); |
| SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); |
| SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); |
| SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); |
| |
| BUG_ON(count > FC_RPORT_NUM_ATTRS); |
| |
| i->rport_attrs[count] = NULL; |
| |
| return &i->t; |
| } |
| EXPORT_SYMBOL(fc_attach_transport); |
| |
| void fc_release_transport(struct scsi_transport_template *t) |
| { |
| struct fc_internal *i = to_fc_internal(t); |
| |
| transport_container_unregister(&i->t.target_attrs); |
| transport_container_unregister(&i->t.host_attrs); |
| transport_container_unregister(&i->rport_attr_cont); |
| |
| kfree(i); |
| } |
| EXPORT_SYMBOL(fc_release_transport); |
| |
| /** |
| * fc_queue_work - Queue work to the fc_host workqueue. |
| * @shost: Pointer to Scsi_Host bound to fc_host. |
| * @work: Work to queue for execution. |
| * |
| * Return value: |
| * 1 - work queued for execution |
| * 0 - work is already queued |
| * -EINVAL - work queue doesn't exist |
| **/ |
| static int |
| fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) |
| { |
| if (unlikely(!fc_host_work_q(shost))) { |
| printk(KERN_ERR |
| "ERROR: FC host '%s' attempted to queue work, " |
| "when no workqueue created.\n", shost->hostt->name); |
| dump_stack(); |
| |
| return -EINVAL; |
| } |
| |
| return queue_work(fc_host_work_q(shost), work); |
| } |
| |
| /** |
| * fc_flush_work - Flush a fc_host's workqueue. |
| * @shost: Pointer to Scsi_Host bound to fc_host. |
| **/ |
| static void |
| fc_flush_work(struct Scsi_Host *shost) |
| { |
| if (!fc_host_work_q(shost)) { |
| printk(KERN_ERR |
| "ERROR: FC host '%s' attempted to flush work, " |
| "when no workqueue created.\n", shost->hostt->name); |
| dump_stack(); |
| return; |
| } |
| |
| flush_workqueue(fc_host_work_q(shost)); |
| } |
| |
| /** |
| * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. |
| * @shost: Pointer to Scsi_Host bound to fc_host. |
| * @work: Work to queue for execution. |
| * @delay: jiffies to delay the work queuing |
| * |
| * Return value: |
| * 0 on success / != 0 for error |
| **/ |
| static int |
| fc_queue_devloss_work(struct Scsi_Host *shost, struct work_struct *work, |
| unsigned long delay) |
| { |
| if (unlikely(!fc_host_devloss_work_q(shost))) { |
| printk(KERN_ERR |
| "ERROR: FC host '%s' attempted to queue work, " |
| "when no workqueue created.\n", shost->hostt->name); |
| dump_stack(); |
| |
| return -EINVAL; |
| } |
| |
| return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); |
| } |
| |
| /** |
| * fc_flush_devloss - Flush a fc_host's devloss workqueue. |
| * @shost: Pointer to Scsi_Host bound to fc_host. |
| **/ |
| static void |
| fc_flush_devloss(struct Scsi_Host *shost) |
| { |
| if (!fc_host_devloss_work_q(shost)) { |
| printk(KERN_ERR |
| "ERROR: FC host '%s' attempted to flush work, " |
| "when no workqueue created.\n", shost->hostt->name); |
| dump_stack(); |
| return; |
| } |
| |
| flush_workqueue(fc_host_devloss_work_q(shost)); |
| } |
| |
| |
| /** |
| * fc_remove_host - called to terminate any fc_transport-related elements |
| * for a scsi host. |
| * @rport: remote port to be unblocked. |
| * |
| * This routine is expected to be called immediately preceeding the |
| * a driver's call to scsi_remove_host(). |
| * |
| * WARNING: A driver utilizing the fc_transport, which fails to call |
| * this routine prior to scsi_remote_host(), will leave dangling |
| * objects in /sys/class/fc_remote_ports. Access to any of these |
| * objects can result in a system crash !!! |
| * |
| * Notes: |
| * This routine assumes no locks are held on entry. |
| **/ |
| void |
| fc_remove_host(struct Scsi_Host *shost) |
| { |
| struct fc_rport *rport, *next_rport; |
| struct workqueue_struct *work_q; |
| struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
| |
| /* Remove any remote ports */ |
| list_for_each_entry_safe(rport, next_rport, |
| &fc_host->rports, peers) { |
| list_del(&rport->peers); |
| rport->port_state = FC_PORTSTATE_DELETED; |
| fc_queue_work(shost, &rport->rport_delete_work); |
| } |
| |
| list_for_each_entry_safe(rport, next_rport, |
| &fc_host->rport_bindings, peers) { |
| list_del(&rport->peers); |
| rport->port_state = FC_PORTSTATE_DELETED; |
| fc_queue_work(shost, &rport->rport_delete_work); |
| } |
| |
| /* flush all scan work items */ |
| scsi_flush_work(shost); |
| |
| /* flush all stgt delete, and rport delete work items, then kill it */ |
| if (fc_host->work_q) { |
| work_q = fc_host->work_q; |
| fc_host->work_q = NULL; |
| destroy_workqueue(work_q); |
| } |
| |
| /* flush all devloss work items, then kill it */ |
| if (fc_host->devloss_work_q) { |
| work_q = fc_host->devloss_work_q; |
| fc_host->devloss_work_q = NULL; |
| destroy_workqueue(work_q); |
| } |
| } |
| EXPORT_SYMBOL(fc_remove_host); |
| |
| |
| /** |
| * fc_starget_delete - called to delete the scsi decendents of an rport |
| * (target and all sdevs) |
| * |
| * @data: remote port to be operated on. |
| **/ |
| static void |
| fc_starget_delete(void *data) |
| { |
| struct fc_rport *rport = (struct fc_rport *)data; |
| struct Scsi_Host *shost = rport_to_shost(rport); |
| unsigned long flags; |
| |
| 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->dev_loss_work)) |
| fc_flush_devloss(shost); |
| spin_lock_irqsave(shost->host_lock, flags); |
| rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; |
| } |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| scsi_remove_target(&rport->dev); |
| } |
| |
| |
| /** |
| * fc_rport_final_delete - finish rport termination and delete it. |
| * |
| * @data: remote port to be deleted. |
| **/ |
| static void |
| fc_rport_final_delete(void *data) |
| { |
| struct fc_rport *rport = (struct fc_rport *)data; |
| struct device *dev = &rport->dev; |
| struct Scsi_Host *shost = rport_to_shost(rport); |
| |
| /* Delete SCSI target and sdevs */ |
| if (rport->scsi_target_id != -1) |
| fc_starget_delete(data); |
| |
| /* |
| * 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); |
| |
| transport_remove_device(dev); |
| device_del(dev); |
| transport_destroy_device(dev); |
| put_device(&shost->shost_gendev); |
| } |
| |
| |
| /** |
| * fc_rport_create - allocates and creates a remote FC port. |
| * @shost: scsi host the remote port is connected to. |
| * @channel: Channel on shost port connected to. |
| * @ids: The world wide names, fc address, and FC4 port |
| * roles for the remote port. |
| * |
| * Allocates and creates the remoter port structure, including the |
| * class and sysfs creation. |
| * |
| * Notes: |
| * This routine assumes no locks are held on entry. |
| **/ |
| struct fc_rport * |
| fc_rport_create(struct Scsi_Host *shost, int channel, |
| struct fc_rport_identifiers *ids) |
| { |
| struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
| struct fc_internal *fci = to_fc_internal(shost->transportt); |
| struct fc_rport *rport; |
| struct device *dev; |
| unsigned long flags; |
| int error; |
| size_t size; |
| |
| size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); |
| rport = kzalloc(size, GFP_KERNEL); |
| if (unlikely(!rport)) { |
| printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__); |
| return NULL; |
| } |
| |
| rport->maxframe_size = -1; |
| rport->supported_classes = FC_COS_UNSPECIFIED; |
| rport->dev_loss_tmo = fc_dev_loss_tmo; |
| memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); |
| memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); |
| rport->port_id = ids->port_id; |
| rport->roles = ids->roles; |
| rport->port_state = FC_PORTSTATE_ONLINE; |
| if (fci->f->dd_fcrport_size) |
| rport->dd_data = &rport[1]; |
| rport->channel = channel; |
| |
| INIT_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport, rport); |
| INIT_WORK(&rport->scan_work, fc_scsi_scan_rport, rport); |
| INIT_WORK(&rport->stgt_delete_work, fc_starget_delete, rport); |
| INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete, rport); |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| |
| rport->number = fc_host->next_rport_number++; |
| if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) |
| rport->scsi_target_id = fc_host->next_target_id++; |
| else |
| rport->scsi_target_id = -1; |
| list_add_tail(&rport->peers, &fc_host->rports); |
| get_device(&shost->shost_gendev); |
| |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| dev = &rport->dev; |
| device_initialize(dev); |
| dev->parent = get_device(&shost->shost_gendev); |
| dev->release = fc_rport_dev_release; |
| sprintf(dev->bus_id, "rport-%d:%d-%d", |
| shost->host_no, channel, rport->number); |
| transport_setup_device(dev); |
| |
| error = device_add(dev); |
| if (error) { |
| printk(KERN_ERR "FC Remote Port device_add failed\n"); |
| goto delete_rport; |
| } |
| transport_add_device(dev); |
| transport_configure_device(dev); |
| |
| if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) { |
| /* initiate a scan of the target */ |
| rport->flags |= FC_RPORT_SCAN_PENDING; |
| scsi_queue_work(shost, &rport->scan_work); |
| } |
| |
| return rport; |
| |
| delete_rport: |
| transport_destroy_device(dev); |
| put_device(dev->parent); |
| spin_lock_irqsave(shost->host_lock, flags); |
| list_del(&rport->peers); |
| put_device(&shost->shost_gendev); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| put_device(dev->parent); |
| kfree(rport); |
| return NULL; |
| } |
| |
| /** |
| * fc_remote_port_add - notifies the fc transport of the existence |
| * of a remote FC port. |
| * @shost: scsi host the remote port is connected to. |
| * @channel: Channel on shost port connected to. |
| * @ids: The world wide names, fc address, and FC4 port |
| * roles for the remote port. |
| * |
| * The LLDD calls this routine to notify the transport of the existence |
| * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) |
| * of the port, it's FC address (port_id), and the FC4 roles that are |
| * active for the port. |
| * |
| * For ports that are FCP targets (aka scsi targets), the FC transport |
| * maintains consistent target id bindings on behalf of the LLDD. |
| * A consistent target id binding is an assignment of a target id to |
| * a remote port identifier, which persists while the scsi host is |
| * attached. The remote port can disappear, then later reappear, and |
| * it's target id assignment remains the same. This allows for shifts |
| * in FC addressing (if binding by wwpn or wwnn) with no apparent |
| * changes to the scsi subsystem which is based on scsi host number and |
| * target id values. Bindings are only valid during the attachment of |
| * the scsi host. If the host detaches, then later re-attaches, target |
| * id bindings may change. |
| * |
| * This routine is responsible for returning a remote port structure. |
| * The routine will search the list of remote ports it maintains |
| * internally on behalf of consistent target id mappings. If found, the |
| * remote port structure will be reused. Otherwise, a new remote port |
| * structure will be allocated. |
| * |
| * Whenever a remote port is allocated, a new fc_remote_port class |
| * device is created. |
| * |
| * Should not be called from interrupt context. |
| * |
| * Notes: |
| * This routine assumes no locks are held on entry. |
| **/ |
| struct fc_rport * |
| fc_remote_port_add(struct Scsi_Host *shost, int channel, |
| struct fc_rport_identifiers *ids) |
| { |
| struct fc_internal *fci = to_fc_internal(shost->transportt); |
| struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
| struct fc_rport *rport; |
| unsigned long flags; |
| int match = 0; |
| |
| /* ensure any stgt delete functions are done */ |
| fc_flush_work(shost); |
| |
| /* |
| * Search the list of "active" rports, for an rport that has been |
| * deleted, but we've held off the real delete while the target |
| * is in a "blocked" state. |
| */ |
| spin_lock_irqsave(shost->host_lock, flags); |
| |
| list_for_each_entry(rport, &fc_host->rports, peers) { |
| |
| if ((rport->port_state == FC_PORTSTATE_BLOCKED) && |
| (rport->channel == channel)) { |
| |
| switch (fc_host->tgtid_bind_type) { |
| case FC_TGTID_BIND_BY_WWPN: |
| case FC_TGTID_BIND_NONE: |
| if (rport->port_name == ids->port_name) |
| match = 1; |
| break; |
| case FC_TGTID_BIND_BY_WWNN: |
| if (rport->node_name == ids->node_name) |
| match = 1; |
| break; |
| case FC_TGTID_BIND_BY_ID: |
| if (rport->port_id == ids->port_id) |
| match = 1; |
| break; |
| } |
| |
| if (match) { |
| struct work_struct *work = |
| &rport->dev_loss_work; |
| |
| memcpy(&rport->node_name, &ids->node_name, |
| sizeof(rport->node_name)); |
| memcpy(&rport->port_name, &ids->port_name, |
| sizeof(rport->port_name)); |
| rport->port_id = ids->port_id; |
| |
| rport->port_state = FC_PORTSTATE_ONLINE; |
| rport->roles = ids->roles; |
| |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| if (fci->f->dd_fcrport_size) |
| memset(rport->dd_data, 0, |
| fci->f->dd_fcrport_size); |
| |
| /* |
| * If we were blocked, we were a target. |
| * If no longer a target, we leave the timer |
| * running in case the port changes roles |
| * prior to the timer expiring. If the timer |
| * fires, the target will be torn down. |
| */ |
| if (!(ids->roles & FC_RPORT_ROLE_FCP_TARGET)) |
| return rport; |
| |
| /* restart the target */ |
| |
| /* |
| * Stop the target timer first. Take no action |
| * on the del_timer failure as the state |
| * machine state change will validate the |
| * transaction. |
| */ |
| if (!cancel_delayed_work(work)) |
| fc_flush_devloss(shost); |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| |
| rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; |
| |
| /* initiate a scan of the target */ |
| rport->flags |= FC_RPORT_SCAN_PENDING; |
| scsi_queue_work(shost, &rport->scan_work); |
| |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| scsi_target_unblock(&rport->dev); |
| |
| return rport; |
| } |
| } |
| } |
| |
| /* Search the bindings array */ |
| if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { |
| |
| /* search for a matching consistent binding */ |
| |
| list_for_each_entry(rport, &fc_host->rport_bindings, |
| peers) { |
| if (rport->channel != channel) |
| continue; |
| |
| switch (fc_host->tgtid_bind_type) { |
| case FC_TGTID_BIND_BY_WWPN: |
| if (rport->port_name == ids->port_name) |
| match = 1; |
| break; |
| case FC_TGTID_BIND_BY_WWNN: |
| if (rport->node_name == ids->node_name) |
| match = 1; |
| break; |
| case FC_TGTID_BIND_BY_ID: |
| if (rport->port_id == ids->port_id) |
| match = 1; |
| break; |
| case FC_TGTID_BIND_NONE: /* to keep compiler happy */ |
| break; |
| } |
| |
| if (match) { |
| list_move_tail(&rport->peers, &fc_host->rports); |
| break; |
| } |
| } |
| |
| if (match) { |
| memcpy(&rport->node_name, &ids->node_name, |
| sizeof(rport->node_name)); |
| memcpy(&rport->port_name, &ids->port_name, |
| sizeof(rport->port_name)); |
| rport->port_id = ids->port_id; |
| rport->roles = ids->roles; |
| rport->port_state = FC_PORTSTATE_ONLINE; |
| |
| if (fci->f->dd_fcrport_size) |
| memset(rport->dd_data, 0, |
| fci->f->dd_fcrport_size); |
| |
| if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) { |
| /* initiate a scan of the target */ |
| rport->flags |= FC_RPORT_SCAN_PENDING; |
| scsi_queue_work(shost, &rport->scan_work); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| scsi_target_unblock(&rport->dev); |
| } else |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| return rport; |
| } |
| } |
| |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| /* No consistent binding found - create new remote port entry */ |
| rport = fc_rport_create(shost, channel, ids); |
| |
| return rport; |
| } |
| EXPORT_SYMBOL(fc_remote_port_add); |
| |
| |
| /** |
| * fc_remote_port_delete - notifies the fc transport that a remote |
| * port is no longer in existence. |
| * @rport: The remote port that no longer exists |
| * |
| * The LLDD calls this routine to notify the transport that a remote |
| * port is no longer part of the topology. Note: Although a port |
| * may no longer be part of the topology, it may persist in the remote |
| * ports displayed by the fc_host. We do this under 2 conditions: |
| * - If the port was a scsi target, we delay its deletion by "blocking" it. |
| * This allows the port to temporarily disappear, then reappear without |
| * disrupting the SCSI device tree attached to it. During the "blocked" |
| * period the port will still exist. |
| * - If the port was a scsi target and disappears for longer than we |
| * expect, we'll delete the port and the tear down the SCSI device tree |
| * attached to it. However, we want to semi-persist the target id assigned |
| * to that port if it eventually does exist. The port structure will |
| * remain (although with minimal information) so that the target id |
| * bindings remails. |
| * |
| * If the remote port is not an FCP Target, it will be fully torn down |
| * and deallocated, including the fc_remote_port class device. |
| * |
| * If the remote port is an FCP Target, the port will be placed in a |
| * temporary blocked state. From the LLDD's perspective, the rport no |
| * longer exists. From the SCSI midlayer's perspective, the SCSI target |
| * exists, but all sdevs on it are blocked from further I/O. The following |
| * is then expected: |
| * If the remote port does not return (signaled by a LLDD call to |
| * fc_remote_port_add()) within the dev_loss_tmo timeout, then the |
| * scsi target is removed - killing all outstanding i/o and removing the |
| * scsi devices attached ot it. The port structure will be marked Not |
| * Present and be partially cleared, leaving only enough information to |
| * recognize the remote port relative to the scsi target id binding if |
| * it later appears. The port will remain as long as there is a valid |
| * binding (e.g. until the user changes the binding type or unloads the |
| * scsi host with the binding). |
| * |
| * If the remote port returns within the dev_loss_tmo value (and matches |
| * according to the target id binding type), the port structure will be |
| * reused. If it is no longer a SCSI target, the target will be torn |
| * down. If it continues to be a SCSI target, then the target will be |
| * unblocked (allowing i/o to be resumed), and a scan will be activated |
| * to ensure that all luns are detected. |
| * |
| * Called from normal process context only - cannot be called from interrupt. |
| * |
| * Notes: |
| * This routine assumes no locks are held on entry. |
| **/ |
| void |
| fc_remote_port_delete(struct fc_rport *rport) |
| { |
| struct Scsi_Host *shost = rport_to_shost(rport); |
| int timeout = rport->dev_loss_tmo; |
| unsigned long flags; |
| |
| /* |
| * No need to flush the fc_host work_q's, as all adds are synchronous. |
| * |
| * We do need to reclaim the rport scan work element, so eventually |
| * (in fc_rport_final_delete()) we'll flush the scsi host work_q if |
| * there's still a scan pending. |
| */ |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| |
| /* If no scsi target id mapping, delete it */ |
| if (rport->scsi_target_id == -1) { |
| list_del(&rport->peers); |
| rport->port_state = FC_PORTSTATE_DELETED; |
| fc_queue_work(shost, &rport->rport_delete_work); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| return; |
| } |
| |
| rport->port_state = FC_PORTSTATE_BLOCKED; |
| |
| rport->flags |= FC_RPORT_DEVLOSS_PENDING; |
| |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| scsi_target_block(&rport->dev); |
| |
| /* cap the length the devices can be blocked until they are deleted */ |
| fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); |
| } |
| EXPORT_SYMBOL(fc_remote_port_delete); |
| |
| /** |
| * fc_remote_port_rolechg - notifies the fc transport that the roles |
| * on a remote may have changed. |
| * @rport: The remote port that changed. |
| * |
| * The LLDD calls this routine to notify the transport that the roles |
| * on a remote port may have changed. The largest effect of this is |
| * if a port now becomes a FCP Target, it must be allocated a |
| * scsi target id. If the port is no longer a FCP target, any |
| * scsi target id value assigned to it will persist in case the |
| * role changes back to include FCP Target. No changes in the scsi |
| * midlayer will be invoked if the role changes (in the expectation |
| * that the role will be resumed. If it doesn't normal error processing |
| * will take place). |
| * |
| * Should not be called from interrupt context. |
| * |
| * Notes: |
| * This routine assumes no locks are held on entry. |
| **/ |
| void |
| fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) |
| { |
| struct Scsi_Host *shost = rport_to_shost(rport); |
| struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
| unsigned long flags; |
| int create = 0; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| if (roles & FC_RPORT_ROLE_FCP_TARGET) { |
| if (rport->scsi_target_id == -1) { |
| rport->scsi_target_id = fc_host->next_target_id++; |
| create = 1; |
| } else if (!(rport->roles & FC_RPORT_ROLE_FCP_TARGET)) |
| create = 1; |
| } |
| |
| rport->roles = roles; |
| |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| if (create) { |
| /* |
| * There may have been a delete timer running on the |
| * port. Ensure that it is cancelled as we now know |
| * the port is an FCP Target. |
| * Note: we know the rport is exists and in an online |
| * state as the LLDD would not have had an rport |
| * reference to pass us. |
| * |
| * Take no action on the del_timer failure as the state |
| * machine state change will validate the |
| * transaction. |
| */ |
| if (!cancel_delayed_work(&rport->dev_loss_work)) |
| fc_flush_devloss(shost); |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| /* ensure any stgt delete functions are done */ |
| fc_flush_work(shost); |
| |
| /* initiate a scan of the target */ |
| spin_lock_irqsave(shost->host_lock, flags); |
| rport->flags |= FC_RPORT_SCAN_PENDING; |
| scsi_queue_work(shost, &rport->scan_work); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| scsi_target_unblock(&rport->dev); |
| } |
| } |
| EXPORT_SYMBOL(fc_remote_port_rolechg); |
| |
| /** |
| * fc_timeout_deleted_rport - Timeout handler for a deleted remote port that |
| * was a SCSI target (thus was blocked), and failed |
| * to return in the alloted time. |
| * |
| * @data: rport target that failed to reappear in the alloted time. |
| **/ |
| static void |
| fc_timeout_deleted_rport(void *data) |
| { |
| struct fc_rport *rport = (struct fc_rport *)data; |
| struct Scsi_Host *shost = rport_to_shost(rport); |
| struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
| unsigned long flags; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| |
| rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; |
| |
| /* |
| * If the port is ONLINE, then it came back. Validate it's still an |
| * FCP target. If not, tear down the scsi_target on it. |
| */ |
| if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
| !(rport->roles & FC_RPORT_ROLE_FCP_TARGET)) { |
| dev_printk(KERN_ERR, &rport->dev, |
| "blocked FC remote port time out: no longer" |
| " a FCP target, removing starget\n"); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| scsi_target_unblock(&rport->dev); |
| fc_queue_work(shost, &rport->stgt_delete_work); |
| return; |
| } |
| |
| if (rport->port_state != FC_PORTSTATE_BLOCKED) { |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| dev_printk(KERN_ERR, &rport->dev, |
| "blocked FC remote port time out: leaving target alone\n"); |
| return; |
| } |
| |
| if (fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) { |
| list_del(&rport->peers); |
| rport->port_state = FC_PORTSTATE_DELETED; |
| dev_printk(KERN_ERR, &rport->dev, |
| "blocked FC remote port time out: removing target\n"); |
| fc_queue_work(shost, &rport->rport_delete_work); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| return; |
| } |
| |
| dev_printk(KERN_ERR, &rport->dev, |
| "blocked FC remote port time out: removing target and " |
| "saving binding\n"); |
| |
| list_move_tail(&rport->peers, &fc_host->rport_bindings); |
| |
| /* |
| * Note: We do not remove or clear the hostdata area. This allows |
| * host-specific target data to persist along with the |
| * scsi_target_id. It's up to the host to manage it's hostdata area. |
| */ |
| |
| /* |
| * Reinitialize port attributes that may change if the port comes back. |
| */ |
| rport->maxframe_size = -1; |
| rport->supported_classes = FC_COS_UNSPECIFIED; |
| rport->roles = FC_RPORT_ROLE_UNKNOWN; |
| rport->port_state = FC_PORTSTATE_NOTPRESENT; |
| |
| /* remove the identifiers that aren't used in the consisting binding */ |
| switch (fc_host->tgtid_bind_type) { |
| case FC_TGTID_BIND_BY_WWPN: |
| rport->node_name = -1; |
| rport->port_id = -1; |
| break; |
| case FC_TGTID_BIND_BY_WWNN: |
| rport->port_name = -1; |
| rport->port_id = -1; |
| break; |
| case FC_TGTID_BIND_BY_ID: |
| rport->node_name = -1; |
| rport->port_name = -1; |
| break; |
| case FC_TGTID_BIND_NONE: /* to keep compiler happy */ |
| break; |
| } |
| |
| /* |
| * As this only occurs if the remote port (scsi target) |
| * went away and didn't come back - we'll remove |
| * all attached scsi devices. |
| */ |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| scsi_target_unblock(&rport->dev); |
| fc_queue_work(shost, &rport->stgt_delete_work); |
| } |
| |
| /** |
| * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. |
| * |
| * @data: remote port to be scanned. |
| **/ |
| static void |
| fc_scsi_scan_rport(void *data) |
| { |
| struct fc_rport *rport = (struct fc_rport *)data; |
| struct Scsi_Host *shost = rport_to_shost(rport); |
| unsigned long flags; |
| |
| if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
| (rport->roles & FC_RPORT_ROLE_FCP_TARGET)) { |
| scsi_scan_target(&rport->dev, rport->channel, |
| rport->scsi_target_id, SCAN_WILD_CARD, 1); |
| } |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| rport->flags &= ~FC_RPORT_SCAN_PENDING; |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| } |
| |
| |
| MODULE_AUTHOR("Martin Hicks"); |
| MODULE_DESCRIPTION("FC Transport Attributes"); |
| MODULE_LICENSE("GPL"); |
| |
| module_init(fc_transport_init); |
| module_exit(fc_transport_exit); |