/* * 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 */ #include #include #include #include #include #include #include "scsi_priv.h" #define FC_PRINTK(x, l, f, a...) printk(l "scsi(%d:%d:%d:%d): " f, (x)->host->host_no, (x)->channel, (x)->id, (x)->lun , ##a) /* * 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 < sizeof(table)/sizeof(table[0]); 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 < sizeof(table)/sizeof(table[0]); 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_ONLINE, "Online" }, { FC_PORTSTATE_OFFLINE, "Offline" }, { FC_PORTSTATE_BYPASSED, "Bypassed" }, { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" }, { FC_PORTSTATE_LINKDOWN, "Linkdown" }, { FC_PORTSTATE_ERROR, "Error" }, { FC_PORTSTATE_LOOPBACK, "Loopback" }, }; 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 struct { enum fc_tgtid_binding_type value; char *name; int matchlen; } fc_tgtid_binding_type_names[] = { { 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, "fcportid (FC Address)", 8 }, }; 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 < sizeof(table)/sizeof(table[0]); 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 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_port_speed bit values to ascii string name */ static 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; } static void fc_timeout_blocked_host(void *data); static void fc_timeout_blocked_tgt(void *data); #define FC_STARGET_NUM_ATTRS 4 /* increase this if you add attributes */ #define FC_STARGET_OTHER_ATTRS 0 /* increase this if you add "always on" * attributes */ #define FC_HOST_NUM_ATTRS 15 struct fc_internal { struct scsi_transport_template t; struct fc_function_template *f; /* The actual attributes */ struct class_device_attribute private_starget_attrs[ FC_STARGET_NUM_ATTRS]; /* The array of null terminated pointers to attributes * needed by scsi_sysfs.c */ struct class_device_attribute *starget_attrs[ FC_STARGET_NUM_ATTRS + FC_STARGET_OTHER_ATTRS + 1]; struct class_device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; struct class_device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; }; #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) static int fc_add_target(struct device *dev) { struct scsi_target *starget = to_scsi_target(dev); /* * 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 target. */ fc_starget_node_name(starget) = -1; fc_starget_port_name(starget) = -1; fc_starget_port_id(starget) = -1; fc_starget_dev_loss_tmo(starget) = -1; INIT_WORK(&fc_starget_dev_loss_work(starget), fc_timeout_blocked_tgt, starget); return 0; } static int fc_remove_target(struct device *dev) { struct scsi_target *starget = to_scsi_target(dev); /* Stop the target timer */ if (cancel_delayed_work(&fc_starget_dev_loss_work(starget))) flush_scheduled_work(); return 0; } static DECLARE_TRANSPORT_CLASS(fc_transport_class, "fc_transport", fc_add_target, fc_remove_target, NULL); static int fc_add_host(struct device *dev) { struct Scsi_Host *shost = dev_to_shost(dev); /* * 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(shost) = -1; fc_host_port_name(shost) = -1; fc_host_supported_classes(shost) = FC_COS_UNSPECIFIED; memset(fc_host_supported_fc4s(shost), 0, sizeof(fc_host_supported_fc4s(shost))); memset(fc_host_symbolic_name(shost), 0, sizeof(fc_host_symbolic_name(shost))); fc_host_supported_speeds(shost) = FC_PORTSPEED_UNKNOWN; fc_host_maxframe_size(shost) = -1; memset(fc_host_hardware_version(shost), 0, sizeof(fc_host_hardware_version(shost))); memset(fc_host_firmware_version(shost), 0, sizeof(fc_host_firmware_version(shost))); memset(fc_host_serial_number(shost), 0, sizeof(fc_host_serial_number(shost))); memset(fc_host_opt_rom_version(shost), 0, sizeof(fc_host_opt_rom_version(shost))); memset(fc_host_driver_version(shost), 0, sizeof(fc_host_driver_version(shost))); fc_host_port_id(shost) = -1; fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; memset(fc_host_active_fc4s(shost), 0, sizeof(fc_host_active_fc4s(shost))); fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; fc_host_fabric_name(shost) = -1; fc_host_link_down_tmo(shost) = -1; fc_host_tgtid_bind_type(shost) = FC_TGTID_BIND_BY_WWPN; INIT_WORK(&fc_host_link_down_work(shost), fc_timeout_blocked_host, shost); return 0; } static int fc_remove_host(struct device *dev) { struct Scsi_Host *shost = dev_to_shost(dev); /* Stop the host timer */ if (cancel_delayed_work(&fc_host_link_down_work(shost))) flush_scheduled_work(); return 0; } static DECLARE_TRANSPORT_CLASS(fc_host_class, "fc_host", fc_add_host, fc_remove_host, NULL); static __init int fc_transport_init(void) { int error = transport_class_register(&fc_host_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_host_class); } /* * Remote Port (Target) Attribute Management */ #define fc_starget_show_function(field, format_string, 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); \ if (i->f->get_starget_##field) \ i->f->get_starget_##field(starget); \ return snprintf(buf, 20, format_string, \ cast fc_starget_##field(starget)); \ } #define fc_starget_store_function(field, format_string) \ static ssize_t \ store_fc_starget_##field(struct class_device *cdev, const char *buf, \ size_t count) \ { \ int val; \ 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); \ \ val = simple_strtoul(buf, NULL, 0); \ i->f->set_starget_##field(starget, val); \ return count; \ } #define fc_starget_rd_attr(field, format_string) \ fc_starget_show_function(field, format_string, ) \ static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \ show_fc_starget_##field, NULL) #define fc_starget_rd_attr_cast(field, format_string, cast) \ fc_starget_show_function(field, format_string, (cast)) \ static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \ show_fc_starget_##field, NULL) #define fc_starget_rw_attr(field, format_string) \ fc_starget_show_function(field, format_string, ) \ fc_starget_store_function(field, format_string) \ static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO | S_IWUSR, \ show_fc_starget_##field, \ store_fc_starget_##field) #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 Tranport Remote Port (Target) Attributes: */ fc_starget_rd_attr_cast(node_name, "0x%llx\n", unsigned long long); fc_starget_rd_attr_cast(port_name, "0x%llx\n", unsigned long long); fc_starget_rd_attr(port_id, "0x%06x\n"); fc_starget_rw_attr(dev_loss_tmo, "%d\n"); /* * 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, format_string) \ 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, format_string) \ static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ show_fc_host_##field, \ store_fc_host_##field) #define fc_host_rd_enum_attr(title, maxlen) \ static ssize_t \ show_fc_host_##title (struct class_device *cdev, char *buf) \ { \ struct Scsi_Host *shost = transport_class_to_shost(cdev); \ struct fc_internal *i = to_fc_internal(shost->transportt); \ const char *name; \ if (i->f->get_host_##title) \ i->f->get_host_##title(shost); \ name = get_fc_##title##_name(fc_host_##title(shost)); \ if (!name) \ return -EINVAL; \ return snprintf(buf, maxlen, "%s\n", name); \ } \ static FC_CLASS_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) #define SETUP_HOST_ATTRIBUTE_RD(field) \ i->private_host_attrs[count] = class_device_attr_host_##field; \ i->private_host_attrs[count].attr.mode = S_IRUGO; \ i->private_host_attrs[count].store = NULL; \ i->host_attrs[count] = &i->private_host_attrs[count]; \ if (i->f->show_host_##field) \ count++ #define SETUP_HOST_ATTRIBUTE_RW(field) \ i->private_host_attrs[count] = class_device_attr_host_##field; \ if (!i->f->set_host_##field) { \ i->private_host_attrs[count].attr.mode = S_IRUGO; \ i->private_host_attrs[count].store = NULL; \ } \ i->host_attrs[count] = &i->private_host_attrs[count]; \ if (i->f->show_host_##field) \ count++ #define fc_private_host_show_function(field, format_string, sz, cast) \ static ssize_t \ show_fc_host_##field (struct class_device *cdev, char *buf) \ { \ struct Scsi_Host *shost = transport_class_to_shost(cdev); \ return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ } #define fc_private_host_rd_attr(field, format_string, sz) \ fc_private_host_show_function(field, format_string, sz, ) \ static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ show_fc_host_##field, NULL) #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ fc_private_host_show_function(field, format_string, sz, (cast)) \ static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ show_fc_host_##field, NULL) #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ i->private_host_attrs[count] = class_device_attr_host_##field; \ i->private_host_attrs[count].attr.mode = S_IRUGO; \ i->private_host_attrs[count].store = NULL; \ i->host_attrs[count] = &i->private_host_attrs[count]; \ count++ #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ i->private_host_attrs[count] = class_device_attr_host_##field; \ i->host_attrs[count] = &i->private_host_attrs[count]; \ count++ /* Fixed Host Attributes */ static ssize_t show_fc_host_supported_classes (struct class_device *cdev, char *buf) { struct Scsi_Host *shost = transport_class_to_shost(cdev); if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) return snprintf(buf, 20, "unspecified\n"); return get_fc_cos_names(fc_host_supported_classes(shost), buf); } static FC_CLASS_DEVICE_ATTR(host, supported_classes, S_IRUGO, show_fc_host_supported_classes, NULL); static ssize_t show_fc_host_supported_fc4s (struct class_device *cdev, char *buf) { struct Scsi_Host *shost = transport_class_to_shost(cdev); return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); } static FC_CLASS_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, show_fc_host_supported_fc4s, NULL); static ssize_t show_fc_host_supported_speeds (struct class_device *cdev, char *buf) { struct Scsi_Host *shost = transport_class_to_shost(cdev); if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) return snprintf(buf, 20, "unknown\n"); return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); } static FC_CLASS_DEVICE_ATTR(host, supported_speeds, S_IRUGO, show_fc_host_supported_speeds, NULL); fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); fc_private_host_rd_attr(symbolic_name, "%s\n", (FC_SYMBOLIC_NAME_SIZE +1)); fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); fc_private_host_rd_attr(hardware_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(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); fc_private_host_rd_attr(opt_rom_version, "%s\n", (FC_VERSION_STRING_SIZE +1)); fc_private_host_rd_attr(driver_version, "%s\n", (FC_VERSION_STRING_SIZE +1)); /* Dynamic Host Attributes */ static ssize_t show_fc_host_active_fc4s (struct class_device *cdev, char *buf) { struct Scsi_Host *shost = transport_class_to_shost(cdev); struct fc_internal *i = to_fc_internal(shost->transportt); if (i->f->get_host_active_fc4s) i->f->get_host_active_fc4s(shost); return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); } static FC_CLASS_DEVICE_ATTR(host, active_fc4s, S_IRUGO, show_fc_host_active_fc4s, NULL); static ssize_t show_fc_host_speed (struct class_device *cdev, char *buf) { struct Scsi_Host *shost = transport_class_to_shost(cdev); struct fc_internal *i = to_fc_internal(shost->transportt); if (i->f->get_host_speed) i->f->get_host_speed(shost); if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) return snprintf(buf, 20, "unknown\n"); return get_fc_port_speed_names(fc_host_speed(shost), buf); } static FC_CLASS_DEVICE_ATTR(host, speed, S_IRUGO, show_fc_host_speed, NULL); fc_host_rd_attr(port_id, "0x%06x\n", 20); fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); fc_host_rw_attr(link_down_tmo, "%d\n", 20); /* Private Host Attributes */ static ssize_t show_fc_private_host_tgtid_bind_type(struct class_device *cdev, char *buf) { struct Scsi_Host *shost = transport_class_to_shost(cdev); const char *name; name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); if (!name) return -EINVAL; return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); } static ssize_t store_fc_private_host_tgtid_bind_type(struct class_device *cdev, const char *buf, size_t count) { struct Scsi_Host *shost = transport_class_to_shost(cdev); enum fc_tgtid_binding_type val; if (get_fc_tgtid_bind_type_match(buf, &val)) return -EINVAL; fc_host_tgtid_bind_type(shost) = val; return count; } static FC_CLASS_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, show_fc_private_host_tgtid_bind_type, store_fc_private_host_tgtid_bind_type); /* * Host Statistics Management */ /* Show a given an attribute in the statistics group */ static ssize_t fc_stat_show(const struct class_device *cdev, char *buf, unsigned long offset) { struct Scsi_Host *shost = transport_class_to_shost(cdev); struct fc_internal *i = to_fc_internal(shost->transportt); struct fc_host_statistics *stats; ssize_t ret = -ENOENT; if (offset > sizeof(struct fc_host_statistics) || offset % sizeof(u64) != 0) WARN_ON(1); if (i->f->get_fc_host_stats) { stats = (i->f->get_fc_host_stats)(shost); if (stats) ret = snprintf(buf, 20, "0x%llx\n", (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); } return ret; } /* generate a read-only statistics attribute */ #define fc_host_statistic(name) \ static ssize_t show_fcstat_##name(struct class_device *cd, char *buf) \ { \ return fc_stat_show(cd, buf, \ offsetof(struct fc_host_statistics, name)); \ } \ static FC_CLASS_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) fc_host_statistic(seconds_since_last_reset); fc_host_statistic(tx_frames); fc_host_statistic(tx_words); fc_host_statistic(rx_frames); fc_host_statistic(rx_words); fc_host_statistic(lip_count); fc_host_statistic(nos_count); fc_host_statistic(error_frames); fc_host_statistic(dumped_frames); fc_host_statistic(link_failure_count); fc_host_statistic(loss_of_sync_count); fc_host_statistic(loss_of_signal_count); fc_host_statistic(prim_seq_protocol_err_count); fc_host_statistic(invalid_tx_word_count); fc_host_statistic(invalid_crc_count); fc_host_statistic(fcp_input_requests); fc_host_statistic(fcp_output_requests); fc_host_statistic(fcp_control_requests); fc_host_statistic(fcp_input_megabytes); fc_host_statistic(fcp_output_megabytes); static ssize_t fc_reset_statistics(struct class_device *cdev, const char *buf, size_t count) { struct Scsi_Host *shost = transport_class_to_shost(cdev); struct fc_internal *i = to_fc_internal(shost->transportt); /* ignore any data value written to the attribute */ if (i->f->reset_fc_host_stats) { i->f->reset_fc_host_stats(shost); return count; } return -ENOENT; } static FC_CLASS_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, fc_reset_statistics); static struct attribute *fc_statistics_attrs[] = { &class_device_attr_host_seconds_since_last_reset.attr, &class_device_attr_host_tx_frames.attr, &class_device_attr_host_tx_words.attr, &class_device_attr_host_rx_frames.attr, &class_device_attr_host_rx_words.attr, &class_device_attr_host_lip_count.attr, &class_device_attr_host_nos_count.attr, &class_device_attr_host_error_frames.attr, &class_device_attr_host_dumped_frames.attr, &class_device_attr_host_link_failure_count.attr, &class_device_attr_host_loss_of_sync_count.attr, &class_device_attr_host_loss_of_signal_count.attr, &class_device_attr_host_prim_seq_protocol_err_count.attr, &class_device_attr_host_invalid_tx_word_count.attr, &class_device_attr_host_invalid_crc_count.attr, &class_device_attr_host_fcp_input_requests.attr, &class_device_attr_host_fcp_output_requests.attr, &class_device_attr_host_fcp_control_requests.attr, &class_device_attr_host_fcp_input_megabytes.attr, &class_device_attr_host_fcp_output_megabytes.attr, &class_device_attr_host_reset_statistics.attr, NULL }; static struct attribute_group fc_statistics_group = { .name = "statistics", .attrs = fc_statistics_attrs, }; static int fc_host_match(struct attribute_container *cont, struct device *dev) { struct Scsi_Host *shost; struct fc_internal *i; if (!scsi_is_host_device(dev)) return 0; shost = dev_to_shost(dev); if (!shost->transportt || shost->transportt->host_attrs.class != &fc_host_class.class) return 0; i = to_fc_internal(shost->transportt); return &i->t.host_attrs == 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.class != &fc_host_class.class) return 0; i = to_fc_internal(shost->transportt); return &i->t.target_attrs == cont; } struct scsi_transport_template * fc_attach_transport(struct fc_function_template *ft) { struct fc_internal *i = kmalloc(sizeof(struct fc_internal), GFP_KERNEL); int count = 0; if (unlikely(!i)) return NULL; memset(i, 0, sizeof(struct fc_internal)); i->t.target_attrs.attrs = &i->starget_attrs[0]; i->t.target_attrs.class = &fc_transport_class.class; i->t.target_attrs.match = fc_target_match; attribute_container_register(&i->t.target_attrs); i->t.target_size = sizeof(struct fc_starget_attrs); i->t.host_attrs.attrs = &i->host_attrs[0]; i->t.host_attrs.class = &fc_host_class.class; i->t.host_attrs.match = fc_host_match; attribute_container_register(&i->t.host_attrs); i->t.host_size = sizeof(struct fc_host_attrs); if (ft->get_fc_host_stats) i->t.host_statistics = &fc_statistics_group; i->f = ft; /* * setup remote port (target) attributes */ SETUP_STARGET_ATTRIBUTE_RD(port_id); SETUP_STARGET_ATTRIBUTE_RD(port_name); SETUP_STARGET_ATTRIBUTE_RD(node_name); SETUP_STARGET_ATTRIBUTE_RW(dev_loss_tmo); BUG_ON(count > FC_STARGET_NUM_ATTRS); /* Setup the always-on attributes here */ i->starget_attrs[count] = NULL; /* setup host attributes */ count=0; SETUP_HOST_ATTRIBUTE_RD(node_name); SETUP_HOST_ATTRIBUTE_RD(port_name); SETUP_HOST_ATTRIBUTE_RD(supported_classes); SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); SETUP_HOST_ATTRIBUTE_RD(symbolic_name); SETUP_HOST_ATTRIBUTE_RD(supported_speeds); SETUP_HOST_ATTRIBUTE_RD(maxframe_size); SETUP_HOST_ATTRIBUTE_RD(hardware_version); SETUP_HOST_ATTRIBUTE_RD(firmware_version); SETUP_HOST_ATTRIBUTE_RD(serial_number); SETUP_HOST_ATTRIBUTE_RD(opt_rom_version); SETUP_HOST_ATTRIBUTE_RD(driver_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_RW(link_down_tmo); /* Transport-managed attributes */ SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); BUG_ON(count > FC_HOST_NUM_ATTRS); i->host_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); attribute_container_unregister(&i->t.target_attrs); attribute_container_unregister(&i->t.host_attrs); kfree(i); } EXPORT_SYMBOL(fc_release_transport); /** * fc_device_block - called by target functions to block a scsi device * @dev: scsi device * @data: unused **/ static void fc_device_block(struct scsi_device *sdev, void *data) { scsi_internal_device_block(sdev); } /** * fc_device_unblock - called by target functions to unblock a scsi device * @dev: scsi device * @data: unused **/ static void fc_device_unblock(struct scsi_device *sdev, void *data) { scsi_internal_device_unblock(sdev); } /** * fc_timeout_blocked_tgt - Timeout handler for blocked scsi targets * that fail to recover in the alloted time. * @data: scsi target that failed to reappear in the alloted time. **/ static void fc_timeout_blocked_tgt(void *data) { struct scsi_target *starget = (struct scsi_target *)data; dev_printk(KERN_ERR, &starget->dev, "blocked target time out: target resuming\n"); /* * set the device going again ... if the scsi lld didn't * unblock this device, then IO errors will probably * result if the host still isn't ready. */ starget_for_each_device(starget, NULL, fc_device_unblock); } /** * fc_target_block - block a target by temporarily putting all its scsi devices * into the SDEV_BLOCK state. * @starget: scsi target managed by this fc scsi lldd. * * scsi lldd's with a FC transport call this routine to temporarily stop all * scsi commands to all devices managed by this scsi target. Called * from interrupt or normal process context. * * Returns zero if successful or error if not * * Notes: * The timeout and timer types are extracted from the fc transport * attributes from the caller's target pointer. This routine assumes no * locks are held on entry. **/ int fc_target_block(struct scsi_target *starget) { int timeout = fc_starget_dev_loss_tmo(starget); struct work_struct *work = &fc_starget_dev_loss_work(starget); if (timeout < 0 || timeout > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) return -EINVAL; starget_for_each_device(starget, NULL, fc_device_block); /* The scsi lld blocks this target for the timeout period only. */ schedule_delayed_work(work, timeout * HZ); return 0; } EXPORT_SYMBOL(fc_target_block); /** * fc_target_unblock - unblock a target following a fc_target_block request. * @starget: scsi target managed by this fc scsi lldd. * * scsi lld's with a FC transport call this routine to restart IO to all * devices associated with the caller's scsi target following a fc_target_block * request. Called from interrupt or normal process context. * * Notes: * This routine assumes no locks are held on entry. **/ void fc_target_unblock(struct scsi_target *starget) { /* * 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(&fc_starget_dev_loss_work(starget))) flush_scheduled_work(); starget_for_each_device(starget, NULL, fc_device_unblock); } EXPORT_SYMBOL(fc_target_unblock); /** * fc_timeout_blocked_host - Timeout handler for blocked scsi hosts * that fail to recover in the alloted time. * @data: scsi host that failed to recover its devices in the alloted * time. **/ static void fc_timeout_blocked_host(void *data) { struct Scsi_Host *shost = (struct Scsi_Host *)data; struct scsi_device *sdev; dev_printk(KERN_ERR, &shost->shost_gendev, "blocked host time out: host resuming\n"); shost_for_each_device(sdev, shost) { /* * set the device going again ... if the scsi lld didn't * unblock this device, then IO errors will probably * result if the host still isn't ready. */ scsi_internal_device_unblock(sdev); } } /** * fc_host_block - block all scsi devices managed by the calling host temporarily * by putting each device in the SDEV_BLOCK state. * @shost: scsi host pointer that contains all scsi device siblings. * * scsi lld's with a FC transport call this routine to temporarily stop all * scsi commands to all devices managed by this host. Called * from interrupt or normal process context. * * Returns zero if successful or error if not * * Notes: * The timeout and timer types are extracted from the fc transport * attributes from the caller's host pointer. This routine assumes no * locks are held on entry. **/ int fc_host_block(struct Scsi_Host *shost) { struct scsi_device *sdev; int timeout = fc_host_link_down_tmo(shost); struct work_struct *work = &fc_host_link_down_work(shost); if (timeout < 0 || timeout > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) return -EINVAL; shost_for_each_device(sdev, shost) { scsi_internal_device_block(sdev); } schedule_delayed_work(work, timeout * HZ); return 0; } EXPORT_SYMBOL(fc_host_block); /** * fc_host_unblock - unblock all devices managed by this host following a * fc_host_block request. * @shost: scsi host containing all scsi device siblings to unblock. * * scsi lld's with a FC transport call this routine to restart IO to all scsi * devices managed by the specified scsi host following an fc_host_block * request. Called from interrupt or normal process context. * * Notes: * This routine assumes no locks are held on entry. **/ void fc_host_unblock(struct Scsi_Host *shost) { struct scsi_device *sdev; /* * Stop the host timer first. Take no action on the del_timer * failure as the state machine state change will validate the * transaction. */ if (cancel_delayed_work(&fc_host_link_down_work(shost))) flush_scheduled_work(); shost_for_each_device(sdev, shost) { scsi_internal_device_unblock(sdev); } } EXPORT_SYMBOL(fc_host_unblock); MODULE_AUTHOR("Martin Hicks"); MODULE_DESCRIPTION("FC Transport Attributes"); MODULE_LICENSE("GPL"); module_init(fc_transport_init); module_exit(fc_transport_exit);