| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * iSCSI transport class definitions |
| * |
| * Copyright (C) IBM Corporation, 2004 |
| * Copyright (C) Mike Christie, 2004 - 2005 |
| * Copyright (C) Dmitry Yusupov, 2004 - 2005 |
| * Copyright (C) Alex Aizman, 2004 - 2005 |
| */ |
| #include <linux/module.h> |
| #include <linux/mutex.h> |
| #include <linux/slab.h> |
| #include <linux/bsg-lib.h> |
| #include <linux/idr.h> |
| #include <net/tcp.h> |
| #include <scsi/scsi.h> |
| #include <scsi/scsi_host.h> |
| #include <scsi/scsi_device.h> |
| #include <scsi/scsi_transport.h> |
| #include <scsi/scsi_transport_iscsi.h> |
| #include <scsi/iscsi_if.h> |
| #include <scsi/scsi_cmnd.h> |
| #include <scsi/scsi_bsg_iscsi.h> |
| |
| #define ISCSI_TRANSPORT_VERSION "2.0-870" |
| |
| #define ISCSI_SEND_MAX_ALLOWED 10 |
| |
| #define CREATE_TRACE_POINTS |
| #include <trace/events/iscsi.h> |
| |
| /* |
| * Export tracepoint symbols to be used by other modules. |
| */ |
| EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_conn); |
| EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_eh); |
| EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_session); |
| EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_tcp); |
| EXPORT_TRACEPOINT_SYMBOL_GPL(iscsi_dbg_sw_tcp); |
| |
| static int dbg_session; |
| module_param_named(debug_session, dbg_session, int, |
| S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(debug_session, |
| "Turn on debugging for sessions in scsi_transport_iscsi " |
| "module. Set to 1 to turn on, and zero to turn off. Default " |
| "is off."); |
| |
| static int dbg_conn; |
| module_param_named(debug_conn, dbg_conn, int, |
| S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(debug_conn, |
| "Turn on debugging for connections in scsi_transport_iscsi " |
| "module. Set to 1 to turn on, and zero to turn off. Default " |
| "is off."); |
| |
| #define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \ |
| do { \ |
| if (dbg_session) \ |
| iscsi_cls_session_printk(KERN_INFO, _session, \ |
| "%s: " dbg_fmt, \ |
| __func__, ##arg); \ |
| iscsi_dbg_trace(trace_iscsi_dbg_trans_session, \ |
| &(_session)->dev, \ |
| "%s " dbg_fmt, __func__, ##arg); \ |
| } while (0); |
| |
| #define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \ |
| do { \ |
| if (dbg_conn) \ |
| iscsi_cls_conn_printk(KERN_INFO, _conn, \ |
| "%s: " dbg_fmt, \ |
| __func__, ##arg); \ |
| iscsi_dbg_trace(trace_iscsi_dbg_trans_conn, \ |
| &(_conn)->dev, \ |
| "%s " dbg_fmt, __func__, ##arg); \ |
| } while (0); |
| |
| struct iscsi_internal { |
| struct scsi_transport_template t; |
| struct iscsi_transport *iscsi_transport; |
| struct list_head list; |
| struct device dev; |
| |
| struct transport_container conn_cont; |
| struct transport_container session_cont; |
| }; |
| |
| static atomic_t iscsi_session_nr; /* sysfs session id for next new session */ |
| static struct workqueue_struct *iscsi_eh_timer_workq; |
| |
| static struct workqueue_struct *iscsi_conn_cleanup_workq; |
| |
| static DEFINE_IDA(iscsi_sess_ida); |
| /* |
| * list of registered transports and lock that must |
| * be held while accessing list. The iscsi_transport_lock must |
| * be acquired after the rx_queue_mutex. |
| */ |
| static LIST_HEAD(iscsi_transports); |
| static DEFINE_SPINLOCK(iscsi_transport_lock); |
| |
| #define to_iscsi_internal(tmpl) \ |
| container_of(tmpl, struct iscsi_internal, t) |
| |
| #define dev_to_iscsi_internal(_dev) \ |
| container_of(_dev, struct iscsi_internal, dev) |
| |
| static void iscsi_transport_release(struct device *dev) |
| { |
| struct iscsi_internal *priv = dev_to_iscsi_internal(dev); |
| kfree(priv); |
| } |
| |
| /* |
| * iscsi_transport_class represents the iscsi_transports that are |
| * registered. |
| */ |
| static struct class iscsi_transport_class = { |
| .name = "iscsi_transport", |
| .dev_release = iscsi_transport_release, |
| }; |
| |
| static ssize_t |
| show_transport_handle(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct iscsi_internal *priv = dev_to_iscsi_internal(dev); |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EACCES; |
| return sysfs_emit(buf, "%llu\n", |
| (unsigned long long)iscsi_handle(priv->iscsi_transport)); |
| } |
| static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL); |
| |
| #define show_transport_attr(name, format) \ |
| static ssize_t \ |
| show_transport_##name(struct device *dev, \ |
| struct device_attribute *attr,char *buf) \ |
| { \ |
| struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \ |
| return sysfs_emit(buf, format"\n", priv->iscsi_transport->name);\ |
| } \ |
| static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL); |
| |
| show_transport_attr(caps, "0x%x"); |
| |
| static struct attribute *iscsi_transport_attrs[] = { |
| &dev_attr_handle.attr, |
| &dev_attr_caps.attr, |
| NULL, |
| }; |
| |
| static struct attribute_group iscsi_transport_group = { |
| .attrs = iscsi_transport_attrs, |
| }; |
| |
| /* |
| * iSCSI endpoint attrs |
| */ |
| #define iscsi_dev_to_endpoint(_dev) \ |
| container_of(_dev, struct iscsi_endpoint, dev) |
| |
| #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \ |
| struct device_attribute dev_attr_##_prefix##_##_name = \ |
| __ATTR(_name,_mode,_show,_store) |
| |
| static void iscsi_endpoint_release(struct device *dev) |
| { |
| struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); |
| kfree(ep); |
| } |
| |
| static struct class iscsi_endpoint_class = { |
| .name = "iscsi_endpoint", |
| .dev_release = iscsi_endpoint_release, |
| }; |
| |
| static ssize_t |
| show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); |
| return sysfs_emit(buf, "%llu\n", (unsigned long long) ep->id); |
| } |
| static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL); |
| |
| static struct attribute *iscsi_endpoint_attrs[] = { |
| &dev_attr_ep_handle.attr, |
| NULL, |
| }; |
| |
| static struct attribute_group iscsi_endpoint_group = { |
| .attrs = iscsi_endpoint_attrs, |
| }; |
| |
| #define ISCSI_MAX_EPID -1 |
| |
| static int iscsi_match_epid(struct device *dev, const void *data) |
| { |
| struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); |
| const uint64_t *epid = data; |
| |
| return *epid == ep->id; |
| } |
| |
| struct iscsi_endpoint * |
| iscsi_create_endpoint(int dd_size) |
| { |
| struct device *dev; |
| struct iscsi_endpoint *ep; |
| uint64_t id; |
| int err; |
| |
| for (id = 1; id < ISCSI_MAX_EPID; id++) { |
| dev = class_find_device(&iscsi_endpoint_class, NULL, &id, |
| iscsi_match_epid); |
| if (!dev) |
| break; |
| else |
| put_device(dev); |
| } |
| if (id == ISCSI_MAX_EPID) { |
| printk(KERN_ERR "Too many connections. Max supported %u\n", |
| ISCSI_MAX_EPID - 1); |
| return NULL; |
| } |
| |
| ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL); |
| if (!ep) |
| return NULL; |
| |
| ep->id = id; |
| ep->dev.class = &iscsi_endpoint_class; |
| dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id); |
| err = device_register(&ep->dev); |
| if (err) |
| goto free_ep; |
| |
| err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group); |
| if (err) |
| goto unregister_dev; |
| |
| if (dd_size) |
| ep->dd_data = &ep[1]; |
| return ep; |
| |
| unregister_dev: |
| device_unregister(&ep->dev); |
| return NULL; |
| |
| free_ep: |
| kfree(ep); |
| return NULL; |
| } |
| EXPORT_SYMBOL_GPL(iscsi_create_endpoint); |
| |
| void iscsi_destroy_endpoint(struct iscsi_endpoint *ep) |
| { |
| sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group); |
| device_unregister(&ep->dev); |
| } |
| EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint); |
| |
| void iscsi_put_endpoint(struct iscsi_endpoint *ep) |
| { |
| put_device(&ep->dev); |
| } |
| EXPORT_SYMBOL_GPL(iscsi_put_endpoint); |
| |
| /** |
| * iscsi_lookup_endpoint - get ep from handle |
| * @handle: endpoint handle |
| * |
| * Caller must do a iscsi_put_endpoint. |
| */ |
| struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle) |
| { |
| struct device *dev; |
| |
| dev = class_find_device(&iscsi_endpoint_class, NULL, &handle, |
| iscsi_match_epid); |
| if (!dev) |
| return NULL; |
| |
| return iscsi_dev_to_endpoint(dev); |
| } |
| EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint); |
| |
| /* |
| * Interface to display network param to sysfs |
| */ |
| |
| static void iscsi_iface_release(struct device *dev) |
| { |
| struct iscsi_iface *iface = iscsi_dev_to_iface(dev); |
| struct device *parent = iface->dev.parent; |
| |
| kfree(iface); |
| put_device(parent); |
| } |
| |
| |
| static struct class iscsi_iface_class = { |
| .name = "iscsi_iface", |
| .dev_release = iscsi_iface_release, |
| }; |
| |
| #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \ |
| struct device_attribute dev_attr_##_prefix##_##_name = \ |
| __ATTR(_name, _mode, _show, _store) |
| |
| /* iface attrs show */ |
| #define iscsi_iface_attr_show(type, name, param_type, param) \ |
| static ssize_t \ |
| show_##type##_##name(struct device *dev, struct device_attribute *attr, \ |
| char *buf) \ |
| { \ |
| struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \ |
| struct iscsi_transport *t = iface->transport; \ |
| return t->get_iface_param(iface, param_type, param, buf); \ |
| } \ |
| |
| #define iscsi_iface_net_attr(type, name, param) \ |
| iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \ |
| static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL); |
| |
| #define iscsi_iface_attr(type, name, param) \ |
| iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \ |
| static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL); |
| |
| /* generic read only ipv4 attribute */ |
| iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR); |
| iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW); |
| iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET); |
| iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO); |
| iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en, |
| ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN); |
| iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en, |
| ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN); |
| iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN); |
| iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS); |
| iscsi_iface_net_attr(ipv4_iface, grat_arp_en, |
| ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN); |
| iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en, |
| ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN); |
| iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id, |
| ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID); |
| iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en, |
| ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN); |
| iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en, |
| ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN); |
| iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id, |
| ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID); |
| iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en, |
| ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN); |
| iscsi_iface_net_attr(ipv4_iface, fragment_disable, |
| ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE); |
| iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en, |
| ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN); |
| iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL); |
| |
| /* generic read only ipv6 attribute */ |
| iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR); |
| iscsi_iface_net_attr(ipv6_iface, link_local_addr, |
| ISCSI_NET_PARAM_IPV6_LINKLOCAL); |
| iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER); |
| iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg, |
| ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG); |
| iscsi_iface_net_attr(ipv6_iface, link_local_autocfg, |
| ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG); |
| iscsi_iface_net_attr(ipv6_iface, link_local_state, |
| ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE); |
| iscsi_iface_net_attr(ipv6_iface, router_state, |
| ISCSI_NET_PARAM_IPV6_ROUTER_STATE); |
| iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en, |
| ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN); |
| iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN); |
| iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL); |
| iscsi_iface_net_attr(ipv6_iface, traffic_class, |
| ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS); |
| iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT); |
| iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo, |
| ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO); |
| iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time, |
| ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME); |
| iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo, |
| ISCSI_NET_PARAM_IPV6_ND_STALE_TMO); |
| iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt, |
| ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT); |
| iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu, |
| ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU); |
| |
| /* common read only iface attribute */ |
| iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE); |
| iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID); |
| iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY); |
| iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED); |
| iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU); |
| iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT); |
| iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE); |
| iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN); |
| iscsi_iface_net_attr(iface, tcp_nagle_disable, |
| ISCSI_NET_PARAM_TCP_NAGLE_DISABLE); |
| iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE); |
| iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF); |
| iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE); |
| iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN); |
| iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID); |
| iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN); |
| |
| /* common iscsi specific settings attributes */ |
| iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO); |
| iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN); |
| iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN); |
| iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN); |
| iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN); |
| iscsi_iface_attr(iface, data_seq_in_order, |
| ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN); |
| iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN); |
| iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL); |
| iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH); |
| iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST); |
| iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T); |
| iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST); |
| iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN); |
| iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN); |
| iscsi_iface_attr(iface, discovery_auth_optional, |
| ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL); |
| iscsi_iface_attr(iface, discovery_logout, |
| ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN); |
| iscsi_iface_attr(iface, strict_login_comp_en, |
| ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN); |
| iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME); |
| |
| static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj, |
| struct attribute *attr, int i) |
| { |
| struct device *dev = container_of(kobj, struct device, kobj); |
| struct iscsi_iface *iface = iscsi_dev_to_iface(dev); |
| struct iscsi_transport *t = iface->transport; |
| int param = -1; |
| |
| if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr) |
| param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO; |
| else if (attr == &dev_attr_iface_header_digest.attr) |
| param = ISCSI_IFACE_PARAM_HDRDGST_EN; |
| else if (attr == &dev_attr_iface_data_digest.attr) |
| param = ISCSI_IFACE_PARAM_DATADGST_EN; |
| else if (attr == &dev_attr_iface_immediate_data.attr) |
| param = ISCSI_IFACE_PARAM_IMM_DATA_EN; |
| else if (attr == &dev_attr_iface_initial_r2t.attr) |
| param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN; |
| else if (attr == &dev_attr_iface_data_seq_in_order.attr) |
| param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN; |
| else if (attr == &dev_attr_iface_data_pdu_in_order.attr) |
| param = ISCSI_IFACE_PARAM_PDU_INORDER_EN; |
| else if (attr == &dev_attr_iface_erl.attr) |
| param = ISCSI_IFACE_PARAM_ERL; |
| else if (attr == &dev_attr_iface_max_recv_dlength.attr) |
| param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH; |
| else if (attr == &dev_attr_iface_first_burst_len.attr) |
| param = ISCSI_IFACE_PARAM_FIRST_BURST; |
| else if (attr == &dev_attr_iface_max_outstanding_r2t.attr) |
| param = ISCSI_IFACE_PARAM_MAX_R2T; |
| else if (attr == &dev_attr_iface_max_burst_len.attr) |
| param = ISCSI_IFACE_PARAM_MAX_BURST; |
| else if (attr == &dev_attr_iface_chap_auth.attr) |
| param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN; |
| else if (attr == &dev_attr_iface_bidi_chap.attr) |
| param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN; |
| else if (attr == &dev_attr_iface_discovery_auth_optional.attr) |
| param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL; |
| else if (attr == &dev_attr_iface_discovery_logout.attr) |
| param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN; |
| else if (attr == &dev_attr_iface_strict_login_comp_en.attr) |
| param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN; |
| else if (attr == &dev_attr_iface_initiator_name.attr) |
| param = ISCSI_IFACE_PARAM_INITIATOR_NAME; |
| |
| if (param != -1) |
| return t->attr_is_visible(ISCSI_IFACE_PARAM, param); |
| |
| if (attr == &dev_attr_iface_enabled.attr) |
| param = ISCSI_NET_PARAM_IFACE_ENABLE; |
| else if (attr == &dev_attr_iface_vlan_id.attr) |
| param = ISCSI_NET_PARAM_VLAN_ID; |
| else if (attr == &dev_attr_iface_vlan_priority.attr) |
| param = ISCSI_NET_PARAM_VLAN_PRIORITY; |
| else if (attr == &dev_attr_iface_vlan_enabled.attr) |
| param = ISCSI_NET_PARAM_VLAN_ENABLED; |
| else if (attr == &dev_attr_iface_mtu.attr) |
| param = ISCSI_NET_PARAM_MTU; |
| else if (attr == &dev_attr_iface_port.attr) |
| param = ISCSI_NET_PARAM_PORT; |
| else if (attr == &dev_attr_iface_ipaddress_state.attr) |
| param = ISCSI_NET_PARAM_IPADDR_STATE; |
| else if (attr == &dev_attr_iface_delayed_ack_en.attr) |
| param = ISCSI_NET_PARAM_DELAYED_ACK_EN; |
| else if (attr == &dev_attr_iface_tcp_nagle_disable.attr) |
| param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE; |
| else if (attr == &dev_attr_iface_tcp_wsf_disable.attr) |
| param = ISCSI_NET_PARAM_TCP_WSF_DISABLE; |
| else if (attr == &dev_attr_iface_tcp_wsf.attr) |
| param = ISCSI_NET_PARAM_TCP_WSF; |
| else if (attr == &dev_attr_iface_tcp_timer_scale.attr) |
| param = ISCSI_NET_PARAM_TCP_TIMER_SCALE; |
| else if (attr == &dev_attr_iface_tcp_timestamp_en.attr) |
| param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN; |
| else if (attr == &dev_attr_iface_cache_id.attr) |
| param = ISCSI_NET_PARAM_CACHE_ID; |
| else if (attr == &dev_attr_iface_redirect_en.attr) |
| param = ISCSI_NET_PARAM_REDIRECT_EN; |
| else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) { |
| if (attr == &dev_attr_ipv4_iface_ipaddress.attr) |
| param = ISCSI_NET_PARAM_IPV4_ADDR; |
| else if (attr == &dev_attr_ipv4_iface_gateway.attr) |
| param = ISCSI_NET_PARAM_IPV4_GW; |
| else if (attr == &dev_attr_ipv4_iface_subnet.attr) |
| param = ISCSI_NET_PARAM_IPV4_SUBNET; |
| else if (attr == &dev_attr_ipv4_iface_bootproto.attr) |
| param = ISCSI_NET_PARAM_IPV4_BOOTPROTO; |
| else if (attr == |
| &dev_attr_ipv4_iface_dhcp_dns_address_en.attr) |
| param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN; |
| else if (attr == |
| &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr) |
| param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN; |
| else if (attr == &dev_attr_ipv4_iface_tos_en.attr) |
| param = ISCSI_NET_PARAM_IPV4_TOS_EN; |
| else if (attr == &dev_attr_ipv4_iface_tos.attr) |
| param = ISCSI_NET_PARAM_IPV4_TOS; |
| else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr) |
| param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN; |
| else if (attr == |
| &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr) |
| param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN; |
| else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr) |
| param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID; |
| else if (attr == |
| &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr) |
| param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN; |
| else if (attr == |
| &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr) |
| param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN; |
| else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr) |
| param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID; |
| else if (attr == |
| &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr) |
| param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN; |
| else if (attr == |
| &dev_attr_ipv4_iface_fragment_disable.attr) |
| param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE; |
| else if (attr == |
| &dev_attr_ipv4_iface_incoming_forwarding_en.attr) |
| param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN; |
| else if (attr == &dev_attr_ipv4_iface_ttl.attr) |
| param = ISCSI_NET_PARAM_IPV4_TTL; |
| else |
| return 0; |
| } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) { |
| if (attr == &dev_attr_ipv6_iface_ipaddress.attr) |
| param = ISCSI_NET_PARAM_IPV6_ADDR; |
| else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr) |
| param = ISCSI_NET_PARAM_IPV6_LINKLOCAL; |
| else if (attr == &dev_attr_ipv6_iface_router_addr.attr) |
| param = ISCSI_NET_PARAM_IPV6_ROUTER; |
| else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr) |
| param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG; |
| else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr) |
| param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG; |
| else if (attr == &dev_attr_ipv6_iface_link_local_state.attr) |
| param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE; |
| else if (attr == &dev_attr_ipv6_iface_router_state.attr) |
| param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE; |
| else if (attr == |
| &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr) |
| param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN; |
| else if (attr == &dev_attr_ipv6_iface_mld_en.attr) |
| param = ISCSI_NET_PARAM_IPV6_MLD_EN; |
| else if (attr == &dev_attr_ipv6_iface_flow_label.attr) |
| param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL; |
| else if (attr == &dev_attr_ipv6_iface_traffic_class.attr) |
| param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS; |
| else if (attr == &dev_attr_ipv6_iface_hop_limit.attr) |
| param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT; |
| else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr) |
| param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO; |
| else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr) |
| param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME; |
| else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr) |
| param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO; |
| else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr) |
| param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT; |
| else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr) |
| param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU; |
| else |
| return 0; |
| } else { |
| WARN_ONCE(1, "Invalid iface attr"); |
| return 0; |
| } |
| |
| return t->attr_is_visible(ISCSI_NET_PARAM, param); |
| } |
| |
| static struct attribute *iscsi_iface_attrs[] = { |
| &dev_attr_iface_enabled.attr, |
| &dev_attr_iface_vlan_id.attr, |
| &dev_attr_iface_vlan_priority.attr, |
| &dev_attr_iface_vlan_enabled.attr, |
| &dev_attr_ipv4_iface_ipaddress.attr, |
| &dev_attr_ipv4_iface_gateway.attr, |
| &dev_attr_ipv4_iface_subnet.attr, |
| &dev_attr_ipv4_iface_bootproto.attr, |
| &dev_attr_ipv6_iface_ipaddress.attr, |
| &dev_attr_ipv6_iface_link_local_addr.attr, |
| &dev_attr_ipv6_iface_router_addr.attr, |
| &dev_attr_ipv6_iface_ipaddr_autocfg.attr, |
| &dev_attr_ipv6_iface_link_local_autocfg.attr, |
| &dev_attr_iface_mtu.attr, |
| &dev_attr_iface_port.attr, |
| &dev_attr_iface_ipaddress_state.attr, |
| &dev_attr_iface_delayed_ack_en.attr, |
| &dev_attr_iface_tcp_nagle_disable.attr, |
| &dev_attr_iface_tcp_wsf_disable.attr, |
| &dev_attr_iface_tcp_wsf.attr, |
| &dev_attr_iface_tcp_timer_scale.attr, |
| &dev_attr_iface_tcp_timestamp_en.attr, |
| &dev_attr_iface_cache_id.attr, |
| &dev_attr_iface_redirect_en.attr, |
| &dev_attr_iface_def_taskmgmt_tmo.attr, |
| &dev_attr_iface_header_digest.attr, |
| &dev_attr_iface_data_digest.attr, |
| &dev_attr_iface_immediate_data.attr, |
| &dev_attr_iface_initial_r2t.attr, |
| &dev_attr_iface_data_seq_in_order.attr, |
| &dev_attr_iface_data_pdu_in_order.attr, |
| &dev_attr_iface_erl.attr, |
| &dev_attr_iface_max_recv_dlength.attr, |
| &dev_attr_iface_first_burst_len.attr, |
| &dev_attr_iface_max_outstanding_r2t.attr, |
| &dev_attr_iface_max_burst_len.attr, |
| &dev_attr_iface_chap_auth.attr, |
| &dev_attr_iface_bidi_chap.attr, |
| &dev_attr_iface_discovery_auth_optional.attr, |
| &dev_attr_iface_discovery_logout.attr, |
| &dev_attr_iface_strict_login_comp_en.attr, |
| &dev_attr_iface_initiator_name.attr, |
| &dev_attr_ipv4_iface_dhcp_dns_address_en.attr, |
| &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr, |
| &dev_attr_ipv4_iface_tos_en.attr, |
| &dev_attr_ipv4_iface_tos.attr, |
| &dev_attr_ipv4_iface_grat_arp_en.attr, |
| &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr, |
| &dev_attr_ipv4_iface_dhcp_alt_client_id.attr, |
| &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr, |
| &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr, |
| &dev_attr_ipv4_iface_dhcp_vendor_id.attr, |
| &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr, |
| &dev_attr_ipv4_iface_fragment_disable.attr, |
| &dev_attr_ipv4_iface_incoming_forwarding_en.attr, |
| &dev_attr_ipv4_iface_ttl.attr, |
| &dev_attr_ipv6_iface_link_local_state.attr, |
| &dev_attr_ipv6_iface_router_state.attr, |
| &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr, |
| &dev_attr_ipv6_iface_mld_en.attr, |
| &dev_attr_ipv6_iface_flow_label.attr, |
| &dev_attr_ipv6_iface_traffic_class.attr, |
| &dev_attr_ipv6_iface_hop_limit.attr, |
| &dev_attr_ipv6_iface_nd_reachable_tmo.attr, |
| &dev_attr_ipv6_iface_nd_rexmit_time.attr, |
| &dev_attr_ipv6_iface_nd_stale_tmo.attr, |
| &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr, |
| &dev_attr_ipv6_iface_router_adv_link_mtu.attr, |
| NULL, |
| }; |
| |
| static struct attribute_group iscsi_iface_group = { |
| .attrs = iscsi_iface_attrs, |
| .is_visible = iscsi_iface_attr_is_visible, |
| }; |
| |
| /* convert iscsi_ipaddress_state values to ascii string name */ |
| static const struct { |
| enum iscsi_ipaddress_state value; |
| char *name; |
| } iscsi_ipaddress_state_names[] = { |
| {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" }, |
| {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" }, |
| {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" }, |
| {ISCSI_IPDDRESS_STATE_VALID, "Valid" }, |
| {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" }, |
| {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" }, |
| {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" }, |
| }; |
| |
| char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state) |
| { |
| int i; |
| char *state = NULL; |
| |
| for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) { |
| if (iscsi_ipaddress_state_names[i].value == port_state) { |
| state = iscsi_ipaddress_state_names[i].name; |
| break; |
| } |
| } |
| return state; |
| } |
| EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name); |
| |
| /* convert iscsi_router_state values to ascii string name */ |
| static const struct { |
| enum iscsi_router_state value; |
| char *name; |
| } iscsi_router_state_names[] = { |
| {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" }, |
| {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" }, |
| {ISCSI_ROUTER_STATE_MANUAL, "Manual" }, |
| {ISCSI_ROUTER_STATE_STALE, "Stale" }, |
| }; |
| |
| char *iscsi_get_router_state_name(enum iscsi_router_state router_state) |
| { |
| int i; |
| char *state = NULL; |
| |
| for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) { |
| if (iscsi_router_state_names[i].value == router_state) { |
| state = iscsi_router_state_names[i].name; |
| break; |
| } |
| } |
| return state; |
| } |
| EXPORT_SYMBOL_GPL(iscsi_get_router_state_name); |
| |
| struct iscsi_iface * |
| iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport, |
| uint32_t iface_type, uint32_t iface_num, int dd_size) |
| { |
| struct iscsi_iface *iface; |
| int err; |
| |
| iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL); |
| if (!iface) |
| return NULL; |
| |
| iface->transport = transport; |
| iface->iface_type = iface_type; |
| iface->iface_num = iface_num; |
| iface->dev.release = iscsi_iface_release; |
| iface->dev.class = &iscsi_iface_class; |
| /* parent reference released in iscsi_iface_release */ |
| iface->dev.parent = get_device(&shost->shost_gendev); |
| if (iface_type == ISCSI_IFACE_TYPE_IPV4) |
| dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no, |
| iface_num); |
| else |
| dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no, |
| iface_num); |
| |
| err = device_register(&iface->dev); |
| if (err) |
| goto free_iface; |
| |
| err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group); |
| if (err) |
| goto unreg_iface; |
| |
| if (dd_size) |
| iface->dd_data = &iface[1]; |
| return iface; |
| |
| unreg_iface: |
| device_unregister(&iface->dev); |
| return NULL; |
| |
| free_iface: |
| put_device(iface->dev.parent); |
| kfree(iface); |
| return NULL; |
| } |
| EXPORT_SYMBOL_GPL(iscsi_create_iface); |
| |
| void iscsi_destroy_iface(struct iscsi_iface *iface) |
| { |
| sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group); |
| device_unregister(&iface->dev); |
| } |
| EXPORT_SYMBOL_GPL(iscsi_destroy_iface); |
| |
| /* |
| * Interface to display flash node params to sysfs |
| */ |
| |
| #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \ |
| struct device_attribute dev_attr_##_prefix##_##_name = \ |
| __ATTR(_name, _mode, _show, _store) |
| |
| /* flash node session attrs show */ |
| #define iscsi_flashnode_sess_attr_show(type, name, param) \ |
| static ssize_t \ |
| show_##type##_##name(struct device *dev, struct device_attribute *attr, \ |
| char *buf) \ |
| { \ |
| struct iscsi_bus_flash_session *fnode_sess = \ |
| iscsi_dev_to_flash_session(dev);\ |
| struct iscsi_transport *t = fnode_sess->transport; \ |
| return t->get_flashnode_param(fnode_sess, param, buf); \ |
| } \ |
| |
| |
| #define iscsi_flashnode_sess_attr(type, name, param) \ |
| iscsi_flashnode_sess_attr_show(type, name, param) \ |
| static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \ |
| show_##type##_##name, NULL); |
| |
| /* Flash node session attributes */ |
| |
| iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable, |
| ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE); |
| iscsi_flashnode_sess_attr(fnode, discovery_session, |
| ISCSI_FLASHNODE_DISCOVERY_SESS); |
| iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE); |
| iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN); |
| iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN); |
| iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN); |
| iscsi_flashnode_sess_attr(fnode, data_seq_in_order, |
| ISCSI_FLASHNODE_DATASEQ_INORDER); |
| iscsi_flashnode_sess_attr(fnode, data_pdu_in_order, |
| ISCSI_FLASHNODE_PDU_INORDER); |
| iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN); |
| iscsi_flashnode_sess_attr(fnode, discovery_logout, |
| ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN); |
| iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN); |
| iscsi_flashnode_sess_attr(fnode, discovery_auth_optional, |
| ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL); |
| iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL); |
| iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST); |
| iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT); |
| iscsi_flashnode_sess_attr(fnode, def_time2retain, |
| ISCSI_FLASHNODE_DEF_TIME2RETAIN); |
| iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T); |
| iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID); |
| iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID); |
| iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST); |
| iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo, |
| ISCSI_FLASHNODE_DEF_TASKMGMT_TMO); |
| iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS); |
| iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME); |
| iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT); |
| iscsi_flashnode_sess_attr(fnode, discovery_parent_idx, |
| ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX); |
| iscsi_flashnode_sess_attr(fnode, discovery_parent_type, |
| ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE); |
| iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX); |
| iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX); |
| iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME); |
| iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN); |
| iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD); |
| iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN); |
| iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT); |
| |
| static struct attribute *iscsi_flashnode_sess_attrs[] = { |
| &dev_attr_fnode_auto_snd_tgt_disable.attr, |
| &dev_attr_fnode_discovery_session.attr, |
| &dev_attr_fnode_portal_type.attr, |
| &dev_attr_fnode_entry_enable.attr, |
| &dev_attr_fnode_immediate_data.attr, |
| &dev_attr_fnode_initial_r2t.attr, |
| &dev_attr_fnode_data_seq_in_order.attr, |
| &dev_attr_fnode_data_pdu_in_order.attr, |
| &dev_attr_fnode_chap_auth.attr, |
| &dev_attr_fnode_discovery_logout.attr, |
| &dev_attr_fnode_bidi_chap.attr, |
| &dev_attr_fnode_discovery_auth_optional.attr, |
| &dev_attr_fnode_erl.attr, |
| &dev_attr_fnode_first_burst_len.attr, |
| &dev_attr_fnode_def_time2wait.attr, |
| &dev_attr_fnode_def_time2retain.attr, |
| &dev_attr_fnode_max_outstanding_r2t.attr, |
| &dev_attr_fnode_isid.attr, |
| &dev_attr_fnode_tsid.attr, |
| &dev_attr_fnode_max_burst_len.attr, |
| &dev_attr_fnode_def_taskmgmt_tmo.attr, |
| &dev_attr_fnode_targetalias.attr, |
| &dev_attr_fnode_targetname.attr, |
| &dev_attr_fnode_tpgt.attr, |
| &dev_attr_fnode_discovery_parent_idx.attr, |
| &dev_attr_fnode_discovery_parent_type.attr, |
| &dev_attr_fnode_chap_in_idx.attr, |
| &dev_attr_fnode_chap_out_idx.attr, |
| &dev_attr_fnode_username.attr, |
| &dev_attr_fnode_username_in.attr, |
| &dev_attr_fnode_password.attr, |
| &dev_attr_fnode_password_in.attr, |
| &dev_attr_fnode_is_boot_target.attr, |
| NULL, |
| }; |
| |
| static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj, |
| struct attribute *attr, |
| int i) |
| { |
| struct device *dev = container_of(kobj, struct device, kobj); |
| struct iscsi_bus_flash_session *fnode_sess = |
| iscsi_dev_to_flash_session(dev); |
| struct iscsi_transport *t = fnode_sess->transport; |
| int param; |
| |
| if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) { |
| param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE; |
| } else if (attr == &dev_attr_fnode_discovery_session.attr) { |
| param = ISCSI_FLASHNODE_DISCOVERY_SESS; |
| } else if (attr == &dev_attr_fnode_portal_type.attr) { |
| param = ISCSI_FLASHNODE_PORTAL_TYPE; |
| } else if (attr == &dev_attr_fnode_entry_enable.attr) { |
| param = ISCSI_FLASHNODE_ENTRY_EN; |
| } else if (attr == &dev_attr_fnode_immediate_data.attr) { |
| param = ISCSI_FLASHNODE_IMM_DATA_EN; |
| } else if (attr == &dev_attr_fnode_initial_r2t.attr) { |
| param = ISCSI_FLASHNODE_INITIAL_R2T_EN; |
| } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) { |
| param = ISCSI_FLASHNODE_DATASEQ_INORDER; |
| } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) { |
| param = ISCSI_FLASHNODE_PDU_INORDER; |
| } else if (attr == &dev_attr_fnode_chap_auth.attr) { |
| param = ISCSI_FLASHNODE_CHAP_AUTH_EN; |
| } else if (attr == &dev_attr_fnode_discovery_logout.attr) { |
| param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN; |
| } else if (attr == &dev_attr_fnode_bidi_chap.attr) { |
| param = ISCSI_FLASHNODE_BIDI_CHAP_EN; |
| } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) { |
| param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL; |
| } else if (attr == &dev_attr_fnode_erl.attr) { |
| param = ISCSI_FLASHNODE_ERL; |
| } else if (attr == &dev_attr_fnode_first_burst_len.attr) { |
| param = ISCSI_FLASHNODE_FIRST_BURST; |
| } else if (attr == &dev_attr_fnode_def_time2wait.attr) { |
| param = ISCSI_FLASHNODE_DEF_TIME2WAIT; |
| } else if (attr == &dev_attr_fnode_def_time2retain.attr) { |
| param = ISCSI_FLASHNODE_DEF_TIME2RETAIN; |
| } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) { |
| param = ISCSI_FLASHNODE_MAX_R2T; |
| } else if (attr == &dev_attr_fnode_isid.attr) { |
| param = ISCSI_FLASHNODE_ISID; |
| } else if (attr == &dev_attr_fnode_tsid.attr) { |
| param = ISCSI_FLASHNODE_TSID; |
| } else if (attr == &dev_attr_fnode_max_burst_len.attr) { |
| param = ISCSI_FLASHNODE_MAX_BURST; |
| } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) { |
| param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO; |
| } else if (attr == &dev_attr_fnode_targetalias.attr) { |
| param = ISCSI_FLASHNODE_ALIAS; |
| } else if (attr == &dev_attr_fnode_targetname.attr) { |
| param = ISCSI_FLASHNODE_NAME; |
| } else if (attr == &dev_attr_fnode_tpgt.attr) { |
| param = ISCSI_FLASHNODE_TPGT; |
| } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) { |
| param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX; |
| } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) { |
| param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE; |
| } else if (attr == &dev_attr_fnode_chap_in_idx.attr) { |
| param = ISCSI_FLASHNODE_CHAP_IN_IDX; |
| } else if (attr == &dev_attr_fnode_chap_out_idx.attr) { |
| param = ISCSI_FLASHNODE_CHAP_OUT_IDX; |
| } else if (attr == &dev_attr_fnode_username.attr) { |
| param = ISCSI_FLASHNODE_USERNAME; |
| } else if (attr == &dev_attr_fnode_username_in.attr) { |
| param = ISCSI_FLASHNODE_USERNAME_IN; |
| } else if (attr == &dev_attr_fnode_password.attr) { |
| param = ISCSI_FLASHNODE_PASSWORD; |
| } else if (attr == &dev_attr_fnode_password_in.attr) { |
| param = ISCSI_FLASHNODE_PASSWORD_IN; |
| } else if (attr == &dev_attr_fnode_is_boot_target.attr) { |
| param = ISCSI_FLASHNODE_IS_BOOT_TGT; |
| } else { |
| WARN_ONCE(1, "Invalid flashnode session attr"); |
| return 0; |
| } |
| |
| return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param); |
| } |
| |
| static struct attribute_group iscsi_flashnode_sess_attr_group = { |
| .attrs = iscsi_flashnode_sess_attrs, |
| .is_visible = iscsi_flashnode_sess_attr_is_visible, |
| }; |
| |
| static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = { |
| &iscsi_flashnode_sess_attr_group, |
| NULL, |
| }; |
| |
| static void iscsi_flashnode_sess_release(struct device *dev) |
| { |
| struct iscsi_bus_flash_session *fnode_sess = |
| iscsi_dev_to_flash_session(dev); |
| |
| kfree(fnode_sess->targetname); |
| kfree(fnode_sess->targetalias); |
| kfree(fnode_sess->portal_type); |
| kfree(fnode_sess); |
| } |
| |
| static const struct device_type iscsi_flashnode_sess_dev_type = { |
| .name = "iscsi_flashnode_sess_dev_type", |
| .groups = iscsi_flashnode_sess_attr_groups, |
| .release = iscsi_flashnode_sess_release, |
| }; |
| |
| /* flash node connection attrs show */ |
| #define iscsi_flashnode_conn_attr_show(type, name, param) \ |
| static ssize_t \ |
| show_##type##_##name(struct device *dev, struct device_attribute *attr, \ |
| char *buf) \ |
| { \ |
| struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\ |
| struct iscsi_bus_flash_session *fnode_sess = \ |
| iscsi_flash_conn_to_flash_session(fnode_conn);\ |
| struct iscsi_transport *t = fnode_conn->transport; \ |
| return t->get_flashnode_param(fnode_sess, param, buf); \ |
| } \ |
| |
| |
| #define iscsi_flashnode_conn_attr(type, name, param) \ |
| iscsi_flashnode_conn_attr_show(type, name, param) \ |
| static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \ |
| show_##type##_##name, NULL); |
| |
| /* Flash node connection attributes */ |
| |
| iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6, |
| ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6); |
| iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN); |
| iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN); |
| iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN); |
| iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat, |
| ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT); |
| iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable, |
| ISCSI_FLASHNODE_TCP_NAGLE_DISABLE); |
| iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable, |
| ISCSI_FLASHNODE_TCP_WSF_DISABLE); |
| iscsi_flashnode_conn_attr(fnode, tcp_timer_scale, |
| ISCSI_FLASHNODE_TCP_TIMER_SCALE); |
| iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable, |
| ISCSI_FLASHNODE_TCP_TIMESTAMP_EN); |
| iscsi_flashnode_conn_attr(fnode, fragment_disable, |
| ISCSI_FLASHNODE_IP_FRAG_DISABLE); |
| iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO); |
| iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT); |
| iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR); |
| iscsi_flashnode_conn_attr(fnode, max_recv_dlength, |
| ISCSI_FLASHNODE_MAX_RECV_DLENGTH); |
| iscsi_flashnode_conn_attr(fnode, max_xmit_dlength, |
| ISCSI_FLASHNODE_MAX_XMIT_DLENGTH); |
| iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT); |
| iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS); |
| iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC); |
| iscsi_flashnode_conn_attr(fnode, ipv6_flow_label, |
| ISCSI_FLASHNODE_IPV6_FLOW_LABEL); |
| iscsi_flashnode_conn_attr(fnode, redirect_ipaddr, |
| ISCSI_FLASHNODE_REDIRECT_IPADDR); |
| iscsi_flashnode_conn_attr(fnode, max_segment_size, |
| ISCSI_FLASHNODE_MAX_SEGMENT_SIZE); |
| iscsi_flashnode_conn_attr(fnode, link_local_ipv6, |
| ISCSI_FLASHNODE_LINK_LOCAL_IPV6); |
| iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF); |
| iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF); |
| iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN); |
| iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN); |
| |
| static struct attribute *iscsi_flashnode_conn_attrs[] = { |
| &dev_attr_fnode_is_fw_assigned_ipv6.attr, |
| &dev_attr_fnode_header_digest.attr, |
| &dev_attr_fnode_data_digest.attr, |
| &dev_attr_fnode_snack_req.attr, |
| &dev_attr_fnode_tcp_timestamp_stat.attr, |
| &dev_attr_fnode_tcp_nagle_disable.attr, |
| &dev_attr_fnode_tcp_wsf_disable.attr, |
| &dev_attr_fnode_tcp_timer_scale.attr, |
| &dev_attr_fnode_tcp_timestamp_enable.attr, |
| &dev_attr_fnode_fragment_disable.attr, |
| &dev_attr_fnode_max_recv_dlength.attr, |
| &dev_attr_fnode_max_xmit_dlength.attr, |
| &dev_attr_fnode_keepalive_tmo.attr, |
| &dev_attr_fnode_port.attr, |
| &dev_attr_fnode_ipaddress.attr, |
| &dev_attr_fnode_redirect_ipaddr.attr, |
| &dev_attr_fnode_max_segment_size.attr, |
| &dev_attr_fnode_local_port.attr, |
| &dev_attr_fnode_ipv4_tos.attr, |
| &dev_attr_fnode_ipv6_traffic_class.attr, |
| &dev_attr_fnode_ipv6_flow_label.attr, |
| &dev_attr_fnode_link_local_ipv6.attr, |
| &dev_attr_fnode_tcp_xmit_wsf.attr, |
| &dev_attr_fnode_tcp_recv_wsf.attr, |
| &dev_attr_fnode_statsn.attr, |
| &dev_attr_fnode_exp_statsn.attr, |
| NULL, |
| }; |
| |
| static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj, |
| struct attribute *attr, |
| int i) |
| { |
| struct device *dev = container_of(kobj, struct device, kobj); |
| struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev); |
| struct iscsi_transport *t = fnode_conn->transport; |
| int param; |
| |
| if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) { |
| param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6; |
| } else if (attr == &dev_attr_fnode_header_digest.attr) { |
| param = ISCSI_FLASHNODE_HDR_DGST_EN; |
| } else if (attr == &dev_attr_fnode_data_digest.attr) { |
| param = ISCSI_FLASHNODE_DATA_DGST_EN; |
| } else if (attr == &dev_attr_fnode_snack_req.attr) { |
| param = ISCSI_FLASHNODE_SNACK_REQ_EN; |
| } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) { |
| param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT; |
| } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) { |
| param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE; |
| } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) { |
| param = ISCSI_FLASHNODE_TCP_WSF_DISABLE; |
| } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) { |
| param = ISCSI_FLASHNODE_TCP_TIMER_SCALE; |
| } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) { |
| param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN; |
| } else if (attr == &dev_attr_fnode_fragment_disable.attr) { |
| param = ISCSI_FLASHNODE_IP_FRAG_DISABLE; |
| } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) { |
| param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH; |
| } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) { |
| param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH; |
| } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) { |
| param = ISCSI_FLASHNODE_KEEPALIVE_TMO; |
| } else if (attr == &dev_attr_fnode_port.attr) { |
| param = ISCSI_FLASHNODE_PORT; |
| } else if (attr == &dev_attr_fnode_ipaddress.attr) { |
| param = ISCSI_FLASHNODE_IPADDR; |
| } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) { |
| param = ISCSI_FLASHNODE_REDIRECT_IPADDR; |
| } else if (attr == &dev_attr_fnode_max_segment_size.attr) { |
| param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE; |
| } else if (attr == &dev_attr_fnode_local_port.attr) { |
| param = ISCSI_FLASHNODE_LOCAL_PORT; |
| } else if (attr == &dev_attr_fnode_ipv4_tos.attr) { |
| param = ISCSI_FLASHNODE_IPV4_TOS; |
| } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) { |
| param = ISCSI_FLASHNODE_IPV6_TC; |
| } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) { |
| param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL; |
| } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) { |
| param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6; |
| } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) { |
| param = ISCSI_FLASHNODE_TCP_XMIT_WSF; |
| } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) { |
| param = ISCSI_FLASHNODE_TCP_RECV_WSF; |
| } else if (attr == &dev_attr_fnode_statsn.attr) { |
| param = ISCSI_FLASHNODE_STATSN; |
| } else if (attr == &dev_attr_fnode_exp_statsn.attr) { |
| param = ISCSI_FLASHNODE_EXP_STATSN; |
| } else { |
| WARN_ONCE(1, "Invalid flashnode connection attr"); |
| return 0; |
| } |
| |
| return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param); |
| } |
| |
| static struct attribute_group iscsi_flashnode_conn_attr_group = { |
| .attrs = iscsi_flashnode_conn_attrs, |
| .is_visible = iscsi_flashnode_conn_attr_is_visible, |
| }; |
| |
| static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = { |
| &iscsi_flashnode_conn_attr_group, |
| NULL, |
| }; |
| |
| static void iscsi_flashnode_conn_release(struct device *dev) |
| { |
| struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev); |
| |
| kfree(fnode_conn->ipaddress); |
| kfree(fnode_conn->redirect_ipaddr); |
| kfree(fnode_conn->link_local_ipv6_addr); |
| kfree(fnode_conn); |
| } |
| |
| static const struct device_type iscsi_flashnode_conn_dev_type = { |
| .name = "iscsi_flashnode_conn_dev_type", |
| .groups = iscsi_flashnode_conn_attr_groups, |
| .release = iscsi_flashnode_conn_release, |
| }; |
| |
| static struct bus_type iscsi_flashnode_bus; |
| |
| int iscsi_flashnode_bus_match(struct device *dev, |
| struct device_driver *drv) |
| { |
| if (dev->bus == &iscsi_flashnode_bus) |
| return 1; |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match); |
| |
| static struct bus_type iscsi_flashnode_bus = { |
| .name = "iscsi_flashnode", |
| .match = &iscsi_flashnode_bus_match, |
| }; |
| |
| /** |
| * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs |
| * @shost: pointer to host data |
| * @index: index of flashnode to add in sysfs |
| * @transport: pointer to transport data |
| * @dd_size: total size to allocate |
| * |
| * Adds a sysfs entry for the flashnode session attributes |
| * |
| * Returns: |
| * pointer to allocated flashnode sess on success |
| * %NULL on failure |
| */ |
| struct iscsi_bus_flash_session * |
| iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index, |
| struct iscsi_transport *transport, |
| int dd_size) |
| { |
| struct iscsi_bus_flash_session *fnode_sess; |
| int err; |
| |
| fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL); |
| if (!fnode_sess) |
| return NULL; |
| |
| fnode_sess->transport = transport; |
| fnode_sess->target_id = index; |
| fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type; |
| fnode_sess->dev.bus = &iscsi_flashnode_bus; |
| fnode_sess->dev.parent = &shost->shost_gendev; |
| dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u", |
| shost->host_no, index); |
| |
| err = device_register(&fnode_sess->dev); |
| if (err) |
| goto free_fnode_sess; |
| |
| if (dd_size) |
| fnode_sess->dd_data = &fnode_sess[1]; |
| |
| return fnode_sess; |
| |
| free_fnode_sess: |
| kfree(fnode_sess); |
| return NULL; |
| } |
| EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess); |
| |
| /** |
| * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs |
| * @shost: pointer to host data |
| * @fnode_sess: pointer to the parent flashnode session entry |
| * @transport: pointer to transport data |
| * @dd_size: total size to allocate |
| * |
| * Adds a sysfs entry for the flashnode connection attributes |
| * |
| * Returns: |
| * pointer to allocated flashnode conn on success |
| * %NULL on failure |
| */ |
| struct iscsi_bus_flash_conn * |
| iscsi_create_flashnode_conn(struct Scsi_Host *shost, |
| struct iscsi_bus_flash_session *fnode_sess, |
| struct iscsi_transport *transport, |
| int dd_size) |
| { |
| struct iscsi_bus_flash_conn *fnode_conn; |
| int err; |
| |
| fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL); |
| if (!fnode_conn) |
| return NULL; |
| |
| fnode_conn->transport = transport; |
| fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type; |
| fnode_conn->dev.bus = &iscsi_flashnode_bus; |
| fnode_conn->dev.parent = &fnode_sess->dev; |
| dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0", |
| shost->host_no, fnode_sess->target_id); |
| |
| err = device_register(&fnode_conn->dev); |
| if (err) |
| goto free_fnode_conn; |
| |
| if (dd_size) |
| fnode_conn->dd_data = &fnode_conn[1]; |
| |
| return fnode_conn; |
| |
| free_fnode_conn: |
| kfree(fnode_conn); |
| return NULL; |
| } |
| EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn); |
| |
| /** |
| * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn |
| * @dev: device to verify |
| * @data: pointer to data containing value to use for verification |
| * |
| * Verifies if the passed device is flashnode conn device |
| * |
| * Returns: |
| * 1 on success |
| * 0 on failure |
| */ |
| static int iscsi_is_flashnode_conn_dev(struct device *dev, void *data) |
| { |
| return dev->bus == &iscsi_flashnode_bus; |
| } |
| |
| static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn) |
| { |
| device_unregister(&fnode_conn->dev); |
| return 0; |
| } |
| |
| static int flashnode_match_index(struct device *dev, void *data) |
| { |
| struct iscsi_bus_flash_session *fnode_sess = NULL; |
| int ret = 0; |
| |
| if (!iscsi_flashnode_bus_match(dev, NULL)) |
| goto exit_match_index; |
| |
| fnode_sess = iscsi_dev_to_flash_session(dev); |
| ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0; |
| |
| exit_match_index: |
| return ret; |
| } |
| |
| /** |
| * iscsi_get_flashnode_by_index -finds flashnode session entry by index |
| * @shost: pointer to host data |
| * @idx: index to match |
| * |
| * Finds the flashnode session object for the passed index |
| * |
| * Returns: |
| * pointer to found flashnode session object on success |
| * %NULL on failure |
| */ |
| static struct iscsi_bus_flash_session * |
| iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx) |
| { |
| struct iscsi_bus_flash_session *fnode_sess = NULL; |
| struct device *dev; |
| |
| dev = device_find_child(&shost->shost_gendev, &idx, |
| flashnode_match_index); |
| if (dev) |
| fnode_sess = iscsi_dev_to_flash_session(dev); |
| |
| return fnode_sess; |
| } |
| |
| /** |
| * iscsi_find_flashnode_sess - finds flashnode session entry |
| * @shost: pointer to host data |
| * @data: pointer to data containing value to use for comparison |
| * @fn: function pointer that does actual comparison |
| * |
| * Finds the flashnode session object comparing the data passed using logic |
| * defined in passed function pointer |
| * |
| * Returns: |
| * pointer to found flashnode session device object on success |
| * %NULL on failure |
| */ |
| struct device * |
| iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data, |
| int (*fn)(struct device *dev, void *data)) |
| { |
| return device_find_child(&shost->shost_gendev, data, fn); |
| } |
| EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess); |
| |
| /** |
| * iscsi_find_flashnode_conn - finds flashnode connection entry |
| * @fnode_sess: pointer to parent flashnode session entry |
| * |
| * Finds the flashnode connection object comparing the data passed using logic |
| * defined in passed function pointer |
| * |
| * Returns: |
| * pointer to found flashnode connection device object on success |
| * %NULL on failure |
| */ |
| struct device * |
| iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess) |
| { |
| return device_find_child(&fnode_sess->dev, NULL, |
| iscsi_is_flashnode_conn_dev); |
| } |
| EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn); |
| |
| static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data) |
| { |
| if (!iscsi_is_flashnode_conn_dev(dev, NULL)) |
| return 0; |
| |
| return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev)); |
| } |
| |
| /** |
| * iscsi_destroy_flashnode_sess - destroy flashnode session entry |
| * @fnode_sess: pointer to flashnode session entry to be destroyed |
| * |
| * Deletes the flashnode session entry and all children flashnode connection |
| * entries from sysfs |
| */ |
| void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess) |
| { |
| int err; |
| |
| err = device_for_each_child(&fnode_sess->dev, NULL, |
| iscsi_iter_destroy_flashnode_conn_fn); |
| if (err) |
| pr_err("Could not delete all connections for %s. Error %d.\n", |
| fnode_sess->dev.kobj.name, err); |
| |
| device_unregister(&fnode_sess->dev); |
| } |
| EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess); |
| |
| static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data) |
| { |
| if (!iscsi_flashnode_bus_match(dev, NULL)) |
| return 0; |
| |
| iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev)); |
| return 0; |
| } |
| |
| /** |
| * iscsi_destroy_all_flashnode - destroy all flashnode session entries |
| * @shost: pointer to host data |
| * |
| * Destroys all the flashnode session entries and all corresponding children |
| * flashnode connection entries from sysfs |
| */ |
| void iscsi_destroy_all_flashnode(struct Scsi_Host *shost) |
| { |
| device_for_each_child(&shost->shost_gendev, NULL, |
| iscsi_iter_destroy_flashnode_fn); |
| } |
| EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode); |
| |
| /* |
| * BSG support |
| */ |
| /** |
| * iscsi_bsg_host_dispatch - Dispatch command to LLD. |
| * @job: bsg job to be processed |
| */ |
| static int iscsi_bsg_host_dispatch(struct bsg_job *job) |
| { |
| struct Scsi_Host *shost = iscsi_job_to_shost(job); |
| struct iscsi_bsg_request *req = job->request; |
| struct iscsi_bsg_reply *reply = job->reply; |
| struct iscsi_internal *i = to_iscsi_internal(shost->transportt); |
| int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ |
| int ret; |
| |
| /* check if we have the msgcode value at least */ |
| if (job->request_len < sizeof(uint32_t)) { |
| ret = -ENOMSG; |
| goto fail_host_msg; |
| } |
| |
| /* Validate the host command */ |
| switch (req->msgcode) { |
| case ISCSI_BSG_HST_VENDOR: |
| cmdlen += sizeof(struct iscsi_bsg_host_vendor); |
| if ((shost->hostt->vendor_id == 0L) || |
| (req->rqst_data.h_vendor.vendor_id != |
| shost->hostt->vendor_id)) { |
| ret = -ESRCH; |
| goto fail_host_msg; |
| } |
| break; |
| default: |
| ret = -EBADR; |
| goto fail_host_msg; |
| } |
| |
| /* check if we really have all the request data needed */ |
| if (job->request_len < cmdlen) { |
| ret = -ENOMSG; |
| goto fail_host_msg; |
| } |
| |
| ret = i->iscsi_transport->bsg_request(job); |
| if (!ret) |
| return 0; |
| |
| fail_host_msg: |
| /* return the errno failure code as the only status */ |
| BUG_ON(job->reply_len < sizeof(uint32_t)); |
| reply->reply_payload_rcv_len = 0; |
| reply->result = ret; |
| job->reply_len = sizeof(uint32_t); |
| bsg_job_done(job, ret, 0); |
| return 0; |
| } |
| |
| /** |
| * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests |
| * @shost: shost for iscsi_host |
| * @ihost: iscsi_cls_host adding the structures to |
| */ |
| static int |
| iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost) |
| { |
| struct device *dev = &shost->shost_gendev; |
| struct iscsi_internal *i = to_iscsi_internal(shost->transportt); |
| struct request_queue *q; |
| char bsg_name[20]; |
| |
| if (!i->iscsi_transport->bsg_request) |
| return -ENOTSUPP; |
| |
| snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no); |
| q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, NULL, 0); |
| if (IS_ERR(q)) { |
| shost_printk(KERN_ERR, shost, "bsg interface failed to " |
| "initialize - no request queue\n"); |
| return PTR_ERR(q); |
| } |
| __scsi_init_queue(shost, q); |
| |
| ihost->bsg_q = q; |
| return 0; |
| } |
| |
| static int iscsi_setup_host(struct transport_container *tc, struct device *dev, |
| struct device *cdev) |
| { |
| struct Scsi_Host *shost = dev_to_shost(dev); |
| struct iscsi_cls_host *ihost = shost->shost_data; |
| |
| memset(ihost, 0, sizeof(*ihost)); |
| atomic_set(&ihost->nr_scans, 0); |
| mutex_init(&ihost->mutex); |
| |
| iscsi_bsg_host_add(shost, ihost); |
| /* ignore any bsg add error - we just can't do sgio */ |
| |
| return 0; |
| } |
| |
| static int iscsi_remove_host(struct transport_container *tc, |
| struct device *dev, struct device *cdev) |
| { |
| struct Scsi_Host *shost = dev_to_shost(dev); |
| struct iscsi_cls_host *ihost = shost->shost_data; |
| |
| bsg_remove_queue(ihost->bsg_q); |
| return 0; |
| } |
| |
| static DECLARE_TRANSPORT_CLASS(iscsi_host_class, |
| "iscsi_host", |
| iscsi_setup_host, |
| iscsi_remove_host, |
| NULL); |
| |
| static DECLARE_TRANSPORT_CLASS(iscsi_session_class, |
| "iscsi_session", |
| NULL, |
| NULL, |
| NULL); |
| |
| static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, |
| "iscsi_connection", |
| NULL, |
| NULL, |
| NULL); |
| |
| static struct sock *nls; |
| static DEFINE_MUTEX(rx_queue_mutex); |
| |
| static LIST_HEAD(sesslist); |
| static DEFINE_SPINLOCK(sesslock); |
| static LIST_HEAD(connlist); |
| static LIST_HEAD(connlist_err); |
| static DEFINE_SPINLOCK(connlock); |
| |
| static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) |
| { |
| struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); |
| return sess->sid; |
| } |
| |
| /* |
| * Returns the matching session to a given sid |
| */ |
| static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) |
| { |
| unsigned long flags; |
| struct iscsi_cls_session *sess; |
| |
| spin_lock_irqsave(&sesslock, flags); |
| list_for_each_entry(sess, &sesslist, sess_list) { |
| if (sess->sid == sid) { |
| spin_unlock_irqrestore(&sesslock, flags); |
| return sess; |
| } |
| } |
| spin_unlock_irqrestore(&sesslock, flags); |
| return NULL; |
| } |
| |
| /* |
| * Returns the matching connection to a given sid / cid tuple |
| */ |
| static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) |
| { |
| unsigned long flags; |
| struct iscsi_cls_conn *conn; |
| |
| spin_lock_irqsave(&connlock, flags); |
| list_for_each_entry(conn, &connlist, conn_list) { |
| if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { |
| spin_unlock_irqrestore(&connlock, flags); |
| return conn; |
| } |
| } |
| spin_unlock_irqrestore(&connlock, flags); |
| return NULL; |
| } |
| |
| /* |
| * The following functions can be used by LLDs that allocate |
| * their own scsi_hosts or by software iscsi LLDs |
| */ |
| static struct { |
| int value; |
| char *name; |
| } iscsi_session_state_names[] = { |
| { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" }, |
| { ISCSI_SESSION_FAILED, "FAILED" }, |
| { ISCSI_SESSION_FREE, "FREE" }, |
| }; |
| |
| static const char *iscsi_session_state_name(int state) |
| { |
| int i; |
| char *name = NULL; |
| |
| for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) { |
| if (iscsi_session_state_names[i].value == state) { |
| name = iscsi_session_state_names[i].name; |
| break; |
| } |
| } |
| return name; |
| } |
| |
| int iscsi_session_chkready(struct iscsi_cls_session *session) |
| { |
| int err; |
| |
| switch (session->state) { |
| case ISCSI_SESSION_LOGGED_IN: |
| err = 0; |
| break; |
| case ISCSI_SESSION_FAILED: |
| err = DID_IMM_RETRY << 16; |
| break; |
| case ISCSI_SESSION_FREE: |
| err = DID_TRANSPORT_FAILFAST << 16; |
| break; |
| default: |
| err = DID_NO_CONNECT << 16; |
| break; |
| } |
| return err; |
| } |
| EXPORT_SYMBOL_GPL(iscsi_session_chkready); |
| |
| int iscsi_is_session_online(struct iscsi_cls_session *session) |
| { |
| unsigned long flags; |
| int ret = 0; |
| |
| spin_lock_irqsave(&session->lock, flags); |
| if (session->state == ISCSI_SESSION_LOGGED_IN) |
| ret = 1; |
| spin_unlock_irqrestore(&session->lock, flags); |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(iscsi_is_session_online); |
| |
| static void iscsi_session_release(struct device *dev) |
| { |
| struct iscsi_cls_session *session = iscsi_dev_to_session(dev); |
| struct Scsi_Host *shost; |
| |
| shost = iscsi_session_to_shost(session); |
| scsi_host_put(shost); |
| ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n"); |
| kfree(session); |
| } |
| |
| int iscsi_is_session_dev(const struct device *dev) |
| { |
| return dev->release == iscsi_session_release; |
| } |
| EXPORT_SYMBOL_GPL(iscsi_is_session_dev); |
| |
| static int iscsi_iter_session_fn(struct device *dev, void *data) |
| { |
| void (* fn) (struct iscsi_cls_session *) = data; |
| |
| if (!iscsi_is_session_dev(dev)) |
| return 0; |
| fn(iscsi_dev_to_session(dev)); |
| return 0; |
| } |
| |
| void iscsi_host_for_each_session(struct Scsi_Host *shost, |
| void (*fn)(struct iscsi_cls_session *)) |
| { |
| device_for_each_child(&shost->shost_gendev, fn, |
| iscsi_iter_session_fn); |
| } |
| EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); |
| |
| /** |
| * iscsi_scan_finished - helper to report when running scans are done |
| * @shost: scsi host |
| * @time: scan run time |
| * |
| * This function can be used by drives like qla4xxx to report to the scsi |
| * layer when the scans it kicked off at module load time are done. |
| */ |
| int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time) |
| { |
| struct iscsi_cls_host *ihost = shost->shost_data; |
| /* |
| * qla4xxx will have kicked off some session unblocks before calling |
| * scsi_scan_host, so just wait for them to complete. |
| */ |
| return !atomic_read(&ihost->nr_scans); |
| } |
| EXPORT_SYMBOL_GPL(iscsi_scan_finished); |
| |
| struct iscsi_scan_data { |
| unsigned int channel; |
| unsigned int id; |
| u64 lun; |
| enum scsi_scan_mode rescan; |
| }; |
| |
| static int iscsi_user_scan_session(struct device *dev, void *data) |
| { |
| struct iscsi_scan_data *scan_data = data; |
| struct iscsi_cls_session *session; |
| struct Scsi_Host *shost; |
| struct iscsi_cls_host *ihost; |
| unsigned long flags; |
| unsigned int id; |
| |
| if (!iscsi_is_session_dev(dev)) |
| return 0; |
| |
| session = iscsi_dev_to_session(dev); |
| |
| ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n"); |
| |
| shost = iscsi_session_to_shost(session); |
| ihost = shost->shost_data; |
| |
| mutex_lock(&ihost->mutex); |
| spin_lock_irqsave(&session->lock, flags); |
| if (session->state != ISCSI_SESSION_LOGGED_IN) { |
| spin_unlock_irqrestore(&session->lock, flags); |
| goto user_scan_exit; |
| } |
| id = session->target_id; |
| spin_unlock_irqrestore(&session->lock, flags); |
| |
| if (id != ISCSI_MAX_TARGET) { |
| if ((scan_data->channel == SCAN_WILD_CARD || |
| scan_data->channel == 0) && |
| (scan_data->id == SCAN_WILD_CARD || |
| scan_data->id == id)) |
| scsi_scan_target(&session->dev, 0, id, |
| scan_data->lun, scan_data->rescan); |
| } |
| |
| user_scan_exit: |
| mutex_unlock(&ihost->mutex); |
| ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n"); |
| return 0; |
| } |
| |
| static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, |
| uint id, u64 lun) |
| { |
| struct iscsi_scan_data scan_data; |
| |
| scan_data.channel = channel; |
| scan_data.id = id; |
| scan_data.lun = lun; |
| scan_data.rescan = SCSI_SCAN_MANUAL; |
| |
| return device_for_each_child(&shost->shost_gendev, &scan_data, |
| iscsi_user_scan_session); |
| } |
| |
| static void iscsi_scan_session(struct work_struct *work) |
| { |
| struct iscsi_cls_session *session = |
| container_of(work, struct iscsi_cls_session, scan_work); |
| struct Scsi_Host *shost = iscsi_session_to_shost(session); |
| struct iscsi_cls_host *ihost = shost->shost_data; |
| struct iscsi_scan_data scan_data; |
| |
| scan_data.channel = 0; |
| scan_data.id = SCAN_WILD_CARD; |
| scan_data.lun = SCAN_WILD_CARD; |
| scan_data.rescan = SCSI_SCAN_RESCAN; |
| |
| iscsi_user_scan_session(&session->dev, &scan_data); |
| atomic_dec(&ihost->nr_scans); |
| } |
| |
| /** |
| * iscsi_block_scsi_eh - block scsi eh until session state has transistioned |
| * @cmd: scsi cmd passed to scsi eh handler |
| * |
| * If the session is down this function will wait for the recovery |
| * timer to fire or for the session to be logged back in. If the |
| * recovery timer fires then FAST_IO_FAIL is returned. The caller |
| * should pass this error value to the scsi eh. |
| */ |
| int iscsi_block_scsi_eh(struct scsi_cmnd *cmd) |
| { |
| struct iscsi_cls_session *session = |
| starget_to_session(scsi_target(cmd->device)); |
| unsigned long flags; |
| int ret = 0; |
| |
| spin_lock_irqsave(&session->lock, flags); |
| while (session->state != ISCSI_SESSION_LOGGED_IN) { |
| if (session->state == ISCSI_SESSION_FREE) { |
| ret = FAST_IO_FAIL; |
| break; |
| } |
| spin_unlock_irqrestore(&session->lock, flags); |
| msleep(1000); |
| spin_lock_irqsave(&session->lock, flags); |
| } |
| spin_unlock_irqrestore(&session->lock, flags); |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh); |
| |
| static void session_recovery_timedout(struct work_struct *work) |
| { |
| struct iscsi_cls_session *session = |
| container_of(work, struct iscsi_cls_session, |
| recovery_work.work); |
| unsigned long flags; |
| |
| iscsi_cls_session_printk(KERN_INFO, session, |
| "session recovery timed out after %d secs\n", |
| session->recovery_tmo); |
| |
| spin_lock_irqsave(&session->lock, flags); |
| switch (session->state) { |
| case ISCSI_SESSION_FAILED: |
| session->state = ISCSI_SESSION_FREE; |
| break; |
| case ISCSI_SESSION_LOGGED_IN: |
| case ISCSI_SESSION_FREE: |
| /* we raced with the unblock's flush */ |
| spin_unlock_irqrestore(&session->lock, flags); |
| return; |
| } |
| spin_unlock_irqrestore(&session->lock, flags); |
| |
| ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n"); |
| scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); |
| ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n"); |
| |
| if (session->transport->session_recovery_timedout) |
| session->transport->session_recovery_timedout(session); |
| } |
| |
| static void __iscsi_unblock_session(struct work_struct *work) |
| { |
| struct iscsi_cls_session *session = |
| container_of(work, struct iscsi_cls_session, |
| unblock_work); |
| struct Scsi_Host *shost = iscsi_session_to_shost(session); |
| struct iscsi_cls_host *ihost = shost->shost_data; |
| unsigned long flags; |
| |
| ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n"); |
| /* |
| * The recovery and unblock work get run from the same workqueue, |
| * so try to cancel it if it was going to run after this unblock. |
| */ |
| cancel_delayed_work(&session->recovery_work); |
| spin_lock_irqsave(&session->lock, flags); |
| session->state = ISCSI_SESSION_LOGGED_IN; |
| spin_unlock_irqrestore(&session->lock, flags); |
| /* start IO */ |
| scsi_target_unblock(&session->dev, SDEV_RUNNING); |
| /* |
| * Only do kernel scanning if the driver is properly hooked into |
| * the async scanning code (drivers like iscsi_tcp do login and |
| * scanning from userspace). |
| */ |
| if (shost->hostt->scan_finished) { |
| if (scsi_queue_work(shost, &session->scan_work)) |
| atomic_inc(&ihost->nr_scans); |
| } |
| ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n"); |
| } |
| |
| /** |
| * iscsi_unblock_session - set a session as logged in and start IO. |
| * @session: iscsi session |
| * |
| * Mark a session as ready to accept IO. |
| */ |
| void iscsi_unblock_session(struct iscsi_cls_session *session) |
| { |
| flush_work(&session->block_work); |
| |
| queue_work(iscsi_eh_timer_workq, &session->unblock_work); |
| /* |
| * Blocking the session can be done from any context so we only |
| * queue the block work. Make sure the unblock work has completed |
| * because it flushes/cancels the other works and updates the state. |
| */ |
| flush_work(&session->unblock_work); |
| } |
| EXPORT_SYMBOL_GPL(iscsi_unblock_session); |
| |
| static void __iscsi_block_session(struct work_struct *work) |
| { |
| struct iscsi_cls_session *session = |
| container_of(work, struct iscsi_cls_session, |
| block_work); |
| unsigned long flags; |
| |
| ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n"); |
| spin_lock_irqsave(&session->lock, flags); |
| session->state = ISCSI_SESSION_FAILED; |
| spin_unlock_irqrestore(&session->lock, flags); |
| scsi_target_block(&session->dev); |
| ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n"); |
| if (session->recovery_tmo >= 0) |
| queue_delayed_work(iscsi_eh_timer_workq, |
| &session->recovery_work, |
| session->recovery_tmo * HZ); |
| } |
| |
| void iscsi_block_session(struct iscsi_cls_session *session) |
| { |
| queue_work(iscsi_eh_timer_workq, &session->block_work); |
| } |
| EXPORT_SYMBOL_GPL(iscsi_block_session); |
| |
| static void __iscsi_unbind_session(struct work_struct *work) |
| { |
| struct iscsi_cls_session *session = |
| container_of(work, struct iscsi_cls_session, |
| unbind_work); |
| struct Scsi_Host *shost = iscsi_session_to_shost(session); |
| struct iscsi_cls_host *ihost = shost->shost_data; |
| unsigned long flags; |
| unsigned int target_id; |
| |
| ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n"); |
| |
| /* Prevent new scans and make sure scanning is not in progress */ |
| mutex_lock(&ihost->mutex); |
| spin_lock_irqsave(&session->lock, flags); |
| if (session->target_id == ISCSI_MAX_TARGET) { |
| spin_unlock_irqrestore(&session->lock, flags); |
| mutex_unlock(&ihost->mutex); |
| goto unbind_session_exit; |
| } |
| |
| target_id = session->target_id; |
| session->target_id = ISCSI_MAX_TARGET; |
| spin_unlock_irqrestore(&session->lock, flags); |
| mutex_unlock(&ihost->mutex); |
| |
| scsi_remove_target(&session->dev); |
| |
| if (session->ida_used) |
| ida_simple_remove(&iscsi_sess_ida, target_id); |
| |
| unbind_session_exit: |
| iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); |
| ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n"); |
| } |
| |
| static void __iscsi_destroy_session(struct work_struct *work) |
| { |
| struct iscsi_cls_session *session = |
| container_of(work, struct iscsi_cls_session, destroy_work); |
| |
| session->transport->destroy_session(session); |
| } |
| |
| struct iscsi_cls_session * |
| iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, |
| int dd_size) |
| { |
| struct iscsi_cls_session *session; |
| |
| session = kzalloc(sizeof(*session) + dd_size, |
| GFP_KERNEL); |
| if (!session) |
| return NULL; |
| |
| session->transport = transport; |
| session->creator = -1; |
| session->recovery_tmo = 120; |
| session->recovery_tmo_sysfs_override = false; |
| session->state = ISCSI_SESSION_FREE; |
| INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); |
| INIT_LIST_HEAD(&session->sess_list); |
| INIT_WORK(&session->unblock_work, __iscsi_unblock_session); |
| INIT_WORK(&session->block_work, __iscsi_block_session); |
| INIT_WORK(&session->unbind_work, __iscsi_unbind_session); |
| INIT_WORK(&session->scan_work, iscsi_scan_session); |
| INIT_WORK(&session->destroy_work, __iscsi_destroy_session); |
| spin_lock_init(&session->lock); |
| |
| /* this is released in the dev's release function */ |
| scsi_host_get(shost); |
| session->dev.parent = &shost->shost_gendev; |
| session->dev.release = iscsi_session_release; |
| device_initialize(&session->dev); |
| if (dd_size) |
| session->dd_data = &session[1]; |
| |
| ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n"); |
| return session; |
| } |
| EXPORT_SYMBOL_GPL(iscsi_alloc_session); |
| |
| int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) |
| { |
| unsigned long flags; |
| int id = 0; |
| int err; |
| |
| session->sid = atomic_add_return(1, &iscsi_session_nr); |
| |
| if (target_id == ISCSI_MAX_TARGET) { |
| id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL); |
| |
| if (id < 0) { |
| iscsi_cls_session_printk(KERN_ERR, session, |
| "Failure in Target ID Allocation\n"); |
| return id; |
| } |
| session->target_id = (unsigned int)id; |
| session->ida_used = true; |
| } else |
| session->target_id = target_id; |
| |
| dev_set_name(&session->dev, "session%u", session->sid); |
| err = device_add(&session->dev); |
| if (err) { |
| iscsi_cls_session_printk(KERN_ERR, session, |
| "could not register session's dev\n"); |
| goto release_ida; |
| } |
| err = transport_register_device(&session->dev); |
| if (err) { |
| iscsi_cls_session_printk(KERN_ERR, session, |
| "could not register transport's dev\n"); |
| goto release_dev; |
| } |
| |
| spin_lock_irqsave(&sesslock, flags); |
| list_add(&session->sess_list, &sesslist); |
| spin_unlock_irqrestore(&sesslock, flags); |
| |
| iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); |
| ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n"); |
| return 0; |
| |
| release_dev: |
| device_del(&session->dev); |
| release_ida: |
| if (session->ida_used) |
| ida_simple_remove(&iscsi_sess_ida, session->target_id); |
| |
| return err; |
| } |
| EXPORT_SYMBOL_GPL(iscsi_add_session); |
| |
| /** |
| * iscsi_create_session - create iscsi class session |
| * @shost: scsi host |
| * @transport: iscsi transport |
| * @dd_size: private driver data size |
| * @target_id: which target |
| * |
| * This can be called from a LLD or iscsi_transport. |
| */ |
| struct iscsi_cls_session * |
| iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, |
| int dd_size, unsigned int target_id) |
| { |
| struct iscsi_cls_session *session; |
| |
| session = iscsi_alloc_session(shost, transport, dd_size); |
| if (!session) |
| return NULL; |
| |
| if (iscsi_add_session(session, target_id)) { |
| iscsi_free_session(session); |
| return NULL; |
| } |
| return session; |
| } |
| EXPORT_SYMBOL_GPL(iscsi_create_session); |
| |
| static void iscsi_conn_release(struct device *dev) |
| { |
| struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); |
| struct device *parent = conn->dev.parent; |
| |
| ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n"); |
| kfree(conn); |
| put_device(parent); |
| } |
| |
| static int iscsi_is_conn_dev(const struct device *dev) |
| { |
| return dev->release == iscsi_conn_release; |
| } |
| |
| static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) |
| { |
| if (!iscsi_is_conn_dev(dev)) |
| return 0; |
| return iscsi_destroy_conn(iscsi_dev_to_conn(dev)); |
| } |
| |
| void iscsi_remove_session(struct iscsi_cls_session *session) |
| { |
| unsigned long flags; |
| int err; |
| |
| ISCSI_DBG_TRANS_SESSION(session, "Removing session\n"); |
| |
| spin_lock_irqsave(&sesslock, flags); |
| if (!list_empty(&session->sess_list)) |
| list_del(&session->sess_list); |
| spin_unlock_irqrestore(&sesslock, flags); |
| |
| flush_work(&session->block_work); |
| flush_work(&session->unblock_work); |
| cancel_delayed_work_sync(&session->recovery_work); |
| /* |
| * If we are blocked let commands flow again. The lld or iscsi |
| * layer should set up the queuecommand to fail commands. |
| * We assume that LLD will not be calling block/unblock while |
| * removing the session. |
| */ |
| spin_lock_irqsave(&session->lock, flags); |
| session->state = ISCSI_SESSION_FREE; |
| spin_unlock_irqrestore(&session->lock, flags); |
| |
| scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE); |
| /* flush running scans then delete devices */ |
| flush_work(&session->scan_work); |
| /* flush running unbind operations */ |
| flush_work(&session->unbind_work); |
| __iscsi_unbind_session(&session->unbind_work); |
| |
| /* hw iscsi may not have removed all connections from session */ |
| err = device_for_each_child(&session->dev, NULL, |
| iscsi_iter_destroy_conn_fn); |
| if (err) |
| iscsi_cls_session_printk(KERN_ERR, session, |
| "Could not delete all connections " |
| "for session. Error %d.\n", err); |
| |
| transport_unregister_device(&session->dev); |
| |
| ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n"); |
| device_del(&session->dev); |
| } |
| EXPORT_SYMBOL_GPL(iscsi_remove_session); |
| |
| static void iscsi_stop_conn(struct iscsi_cls_conn *conn, int flag) |
| { |
| ISCSI_DBG_TRANS_CONN(conn, "Stopping conn.\n"); |
| |
| switch (flag) { |
| case STOP_CONN_RECOVER: |
| conn->state = ISCSI_CONN_FAILED; |
| break; |
| case STOP_CONN_TERM: |
| conn->state = ISCSI_CONN_DOWN; |
| break; |
| default: |
| iscsi_cls_conn_printk(KERN_ERR, conn, "invalid stop flag %d\n", |
| flag); |
| return; |
| } |
| |
| conn->transport->stop_conn(conn, flag); |
| ISCSI_DBG_TRANS_CONN(conn, "Stopping conn done.\n"); |
| } |
| |
| static int iscsi_if_stop_conn(struct iscsi_transport *transport, |
| struct iscsi_uevent *ev) |
| { |
| int flag = ev->u.stop_conn.flag; |
| struct iscsi_cls_conn *conn; |
| |
| conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); |
| if (!conn) |
| return -EINVAL; |
| |
| ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop.\n"); |
| /* |
| * If this is a termination we have to call stop_conn with that flag |
| * so the correct states get set. If we haven't run the work yet try to |
| * avoid the extra run. |
| */ |
| if (flag == STOP_CONN_TERM) { |
| cancel_work_sync(&conn->cleanup_work); |
| iscsi_stop_conn(conn, flag); |
| } else { |
| /* |
| * Figure out if it was the kernel or userspace initiating this. |
| */ |
| if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) { |
| iscsi_stop_conn(conn, flag); |
| } else { |
| ISCSI_DBG_TRANS_CONN(conn, |
| "flush kernel conn cleanup.\n"); |
| flush_work(&conn->cleanup_work); |
| } |
| /* |
| * Only clear for recovery to avoid extra cleanup runs during |
| * termination. |
| */ |
| clear_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags); |
| } |
| ISCSI_DBG_TRANS_CONN(conn, "iscsi if conn stop done.\n"); |
| return 0; |
| } |
| |
| static void iscsi_ep_disconnect(struct iscsi_cls_conn *conn, bool is_active) |
| { |
| struct iscsi_cls_session *session = iscsi_conn_to_session(conn); |
| struct iscsi_endpoint *ep; |
| |
| ISCSI_DBG_TRANS_CONN(conn, "disconnect ep.\n"); |
| conn->state = ISCSI_CONN_FAILED; |
| |
| if (!conn->ep || !session->transport->ep_disconnect) |
| return; |
| |
| ep = conn->ep; |
| conn->ep = NULL; |
| |
| session->transport->unbind_conn(conn, is_active); |
| session->transport->ep_disconnect(ep); |
| ISCSI_DBG_TRANS_CONN(conn, "disconnect ep done.\n"); |
| } |
| |
| static void iscsi_cleanup_conn_work_fn(struct work_struct *work) |
| { |
| struct iscsi_cls_conn *conn = container_of(work, struct iscsi_cls_conn, |
| cleanup_work); |
| struct iscsi_cls_session *session = iscsi_conn_to_session(conn); |
| |
| mutex_lock(&conn->ep_mutex); |
| /* |
| * If we are not at least bound there is nothing for us to do. Userspace |
| * will do a ep_disconnect call if offload is used, but will not be |
| * doing a stop since there is nothing to clean up, so we have to clear |
| * the cleanup bit here. |
| */ |
| if (conn->state != ISCSI_CONN_BOUND && conn->state != ISCSI_CONN_UP) { |
| ISCSI_DBG_TRANS_CONN(conn, "Got error while conn is already failed. Ignoring.\n"); |
| clear_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags); |
| mutex_unlock(&conn->ep_mutex); |
| return; |
| } |
| |
| iscsi_ep_disconnect(conn, false); |
| |
| if (system_state != SYSTEM_RUNNING) { |
| /* |
| * If the user has set up for the session to never timeout |
| * then hang like they wanted. For all other cases fail right |
| * away since userspace is not going to relogin. |
| */ |
| if (session->recovery_tmo > 0) |
| session->recovery_tmo = 0; |
| } |
| |
| iscsi_stop_conn(conn, STOP_CONN_RECOVER); |
| mutex_unlock(&conn->ep_mutex); |
| ISCSI_DBG_TRANS_CONN(conn, "cleanup done.\n"); |
| } |
| |
| void iscsi_free_session(struct iscsi_cls_session *session) |
| { |
| ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n"); |
| iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); |
| put_device(&session->dev); |
| } |
| EXPORT_SYMBOL_GPL(iscsi_free_session); |
| |
| /** |
| * iscsi_create_conn - create iscsi class connection |
| * @session: iscsi cls session |
| * @dd_size: private driver data size |
| * @cid: connection id |
| * |
| * This can be called from a LLD or iscsi_transport. The connection |
| * is child of the session so cid must be unique for all connections |
| * on the session. |
| * |
| * Since we do not support MCS, cid will normally be zero. In some cases |
| * for software iscsi we could be trying to preallocate a connection struct |
| * in which case there could be two connection structs and cid would be |
| * non-zero. |
| */ |
| struct iscsi_cls_conn * |
| iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) |
| { |
| struct iscsi_transport *transport = session->transport; |
| struct iscsi_cls_conn *conn; |
| unsigned long flags; |
| int err; |
| |
| conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); |
| if (!conn) |
| return NULL; |
| if (dd_size) |
| conn->dd_data = &conn[1]; |
| |
| mutex_init(&conn->ep_mutex); |
| INIT_LIST_HEAD(&conn->conn_list); |
| INIT_WORK(&conn->cleanup_work, iscsi_cleanup_conn_work_fn); |
| conn->transport = transport; |
| conn->cid = cid; |
| conn->state = ISCSI_CONN_DOWN; |
| |
| /* this is released in the dev's release function */ |
| if (!get_device(&session->dev)) |
| goto free_conn; |
| |
| dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid); |
| conn->dev.parent = &session->dev; |
| conn->dev.release = iscsi_conn_release; |
| err = device_register(&conn->dev); |
| if (err) { |
| iscsi_cls_session_printk(KERN_ERR, session, "could not " |
| "register connection's dev\n"); |
| goto release_parent_ref; |
| } |
| err = transport_register_device(&conn->dev); |
| if (err) { |
| iscsi_cls_session_printk(KERN_ERR, session, "could not " |
| "register transport's dev\n"); |
| goto release_conn_ref; |
| } |
| |
| spin_lock_irqsave(&connlock, flags); |
| list_add(&conn->conn_list, &connlist); |
| spin_unlock_irqrestore(&connlock, flags); |
| |
| ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n"); |
| return conn; |
| |
| release_conn_ref: |
| device_unregister(&conn->dev); |
| put_device(&session->dev); |
| return NULL; |
| release_parent_ref: |
| put_device(&session->dev); |
| free_conn: |
| kfree(conn); |
| return NULL; |
| } |
| |
| EXPORT_SYMBOL_GPL(iscsi_create_conn); |
| |
| /** |
| * iscsi_destroy_conn - destroy iscsi class connection |
| * @conn: iscsi cls session |
| * |
| * This can be called from a LLD or iscsi_transport. |
| */ |
| int iscsi_destroy_conn(struct iscsi_cls_conn *conn) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&connlock, flags); |
| list_del(&conn->conn_list); |
| spin_unlock_irqrestore(&connlock, flags); |
| |
| transport_unregister_device(&conn->dev); |
| ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n"); |
| device_unregister(&conn->dev); |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(iscsi_destroy_conn); |
| |
| void iscsi_put_conn(struct iscsi_cls_conn *conn) |
| { |
| put_device(&conn->dev); |
| } |
| EXPORT_SYMBOL_GPL(iscsi_put_conn); |
| |
| void iscsi_get_conn(struct iscsi_cls_conn *conn) |
| { |
| get_device(&conn->dev); |
| } |
| EXPORT_SYMBOL_GPL(iscsi_get_conn); |
| |
| /* |
| * iscsi interface functions |
| */ |
| static struct iscsi_internal * |
| iscsi_if_transport_lookup(struct iscsi_transport *tt) |
| { |
| struct iscsi_internal *priv; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&iscsi_transport_lock, flags); |
| list_for_each_entry(priv, &iscsi_transports, list) { |
| if (tt == priv->iscsi_transport) { |
| spin_unlock_irqrestore(&iscsi_transport_lock, flags); |
| return priv; |
| } |
| } |
| spin_unlock_irqrestore(&iscsi_transport_lock, flags); |
| return NULL; |
| } |
| |
| static int |
| iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp) |
| { |
| return nlmsg_multicast(nls, skb, 0, group, gfp); |
| } |
| |
| static int |
| iscsi_unicast_skb(struct sk_buff *skb, u32 portid) |
| { |
| return nlmsg_unicast(nls, skb, portid); |
| } |
| |
| int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, |
| char *data, uint32_t data_size) |
| { |
| struct nlmsghdr *nlh; |
| struct sk_buff *skb; |
| struct iscsi_uevent *ev; |
| char *pdu; |
| struct iscsi_internal *priv; |
| int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) + |
| data_size); |
| |
| priv = iscsi_if_transport_lookup(conn->transport); |
| if (!priv) |
| return -EINVAL; |
| |
| skb = alloc_skb(len, GFP_ATOMIC); |
| if (!skb) { |
| iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED); |
| iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " |
| "control PDU: OOM\n"); |
| return -ENOMEM; |
| } |
| |
| nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); |
| ev = nlmsg_data(nlh); |
| memset(ev, 0, sizeof(*ev)); |
| ev->transport_handle = iscsi_handle(conn->transport); |
| ev->type = ISCSI_KEVENT_RECV_PDU; |
| ev->r.recv_req.cid = conn->cid; |
| ev->r.recv_req.sid = iscsi_conn_get_sid(conn); |
| pdu = (char*)ev + sizeof(*ev); |
| memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); |
| memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); |
| |
| return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); |
| } |
| EXPORT_SYMBOL_GPL(iscsi_recv_pdu); |
| |
| int iscsi_offload_mesg(struct Scsi_Host *shost, |
| struct iscsi_transport *transport, uint32_t type, |
| char *data, uint16_t data_size) |
| { |
| struct nlmsghdr *nlh; |
| struct sk_buff *skb; |
| struct iscsi_uevent *ev; |
| int len = nlmsg_total_size(sizeof(*ev) + data_size); |
| |
| skb = alloc_skb(len, GFP_ATOMIC); |
| if (!skb) { |
| printk(KERN_ERR "can not deliver iscsi offload message:OOM\n"); |
| return -ENOMEM; |
| } |
| |
| nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); |
| ev = nlmsg_data(nlh); |
| memset(ev, 0, sizeof(*ev)); |
| ev->type = type; |
| ev->transport_handle = iscsi_handle(transport); |
| switch (type) { |
| case ISCSI_KEVENT_PATH_REQ: |
| ev->r.req_path.host_no = shost->host_no; |
| break; |
| case ISCSI_KEVENT_IF_DOWN: |
| ev->r.notify_if_down.host_no = shost->host_no; |
| break; |
| } |
| |
| memcpy((char *)ev + sizeof(*ev), data, data_size); |
| |
| return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC); |
| } |
| EXPORT_SYMBOL_GPL(iscsi_offload_mesg); |
| |
| void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error) |
| { |
| struct nlmsghdr *nlh; |
| struct sk_buff *skb; |
| struct iscsi_uevent *ev; |
| struct iscsi_internal *priv; |
| int len = nlmsg_total_size(sizeof(*ev)); |
| |
| if (!test_and_set_bit(ISCSI_CLS_CONN_BIT_CLEANUP, &conn->flags)) |
| queue_work(iscsi_conn_cleanup_workq, &conn->cleanup_work); |
| |
| priv = iscsi_if_transport_lookup(conn->transport); |
| if (!priv) |
| return; |
| |
| skb = alloc_skb(len, GFP_ATOMIC); |
| if (!skb) { |
| iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " |
| "conn error (%d)\n", error); |
| return; |
| } |
| |
| nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); |
| ev = nlmsg_data(nlh); |
| ev->transport_handle = iscsi_handle(conn->transport); |
| ev->type = ISCSI_KEVENT_CONN_ERROR; |
| ev->r.connerror.error = error; |
| ev->r.connerror.cid = conn->cid; |
| ev->r.connerror.sid = iscsi_conn_get_sid(conn); |
| |
| iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); |
| |
| iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", |
| error); |
| } |
| EXPORT_SYMBOL_GPL(iscsi_conn_error_event); |
| |
| void iscsi_conn_login_event(struct iscsi_cls_conn *conn, |
| enum iscsi_conn_state state) |
| { |
| struct nlmsghdr *nlh; |
| struct sk_buff *skb; |
| struct iscsi_uevent *ev; |
| struct iscsi_internal *priv; |
| int len = nlmsg_total_size(sizeof(*ev)); |
| |
| priv = iscsi_if_transport_lookup(conn->transport); |
| if (!priv) |
| return; |
| |
| skb = alloc_skb(len, GFP_ATOMIC); |
| if (!skb) { |
| iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " |
| "conn login (%d)\n", state); |
| return; |
| } |
| |
| nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); |
| ev = nlmsg_data(nlh); |
| ev->transport_handle = iscsi_handle(conn->transport); |
| ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE; |
| ev->r.conn_login.state = state; |
| ev->r.conn_login.cid = conn->cid; |
| ev->r.conn_login.sid = iscsi_conn_get_sid(conn); |
| iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); |
| |
| iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n", |
| state); |
| } |
| EXPORT_SYMBOL_GPL(iscsi_conn_login_event); |
| |
| void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport, |
| enum iscsi_host_event_code code, uint32_t data_size, |
| uint8_t *data) |
| { |
| struct nlmsghdr *nlh; |
| struct sk_buff *skb; |
| struct iscsi_uevent *ev; |
| int len = nlmsg_total_size(sizeof(*ev) + data_size); |
| |
| skb = alloc_skb(len, GFP_NOIO); |
| if (!skb) { |
| printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n", |
| host_no, code); |
| return; |
| } |
| |
| nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); |
| ev = nlmsg_data(nlh); |
| ev->transport_handle = iscsi_handle(transport); |
| ev->type = ISCSI_KEVENT_HOST_EVENT; |
| ev->r.host_event.host_no = host_no; |
| ev->r.host_event.code = code; |
| ev->r.host_event.data_size = data_size; |
| |
| if (data_size) |
| memcpy((char *)ev + sizeof(*ev), data, data_size); |
| |
| iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); |
| } |
| EXPORT_SYMBOL_GPL(iscsi_post_host_event); |
| |
| void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport, |
| uint32_t status, uint32_t pid, uint32_t data_size, |
| uint8_t *data) |
| { |
| struct nlmsghdr *nlh; |
| struct sk_buff *skb; |
| struct iscsi_uevent *ev; |
| int len = nlmsg_total_size(sizeof(*ev) + data_size); |
| |
| skb = alloc_skb(len, GFP_NOIO); |
| if (!skb) { |
| printk(KERN_ERR "gracefully ignored ping comp: OOM\n"); |
| return; |
| } |
| |
| nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); |
| ev = nlmsg_data(nlh); |
| ev->transport_handle = iscsi_handle(transport); |
| ev->type = ISCSI_KEVENT_PING_COMP; |
| ev->r.ping_comp.host_no = host_no; |
| ev->r.ping_comp.status = status; |
| ev->r.ping_comp.pid = pid; |
| ev->r.ping_comp.data_size = data_size; |
| memcpy((char *)ev + sizeof(*ev), data, data_size); |
| |
| iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO); |
| } |
| EXPORT_SYMBOL_GPL(iscsi_ping_comp_event); |
| |
| static int |
| iscsi_if_send_reply(u32 portid, int type, void *payload, int size) |
| { |
| struct sk_buff *skb; |
| struct nlmsghdr *nlh; |
| int len = nlmsg_total_size(size); |
| |
| skb = alloc_skb(len, GFP_ATOMIC); |
| if (!skb) { |
| printk(KERN_ERR "Could not allocate skb to send reply.\n"); |
| return -ENOMEM; |
| } |
| |
| nlh = __nlmsg_put(skb, 0, 0, type, (len - sizeof(*nlh)), 0); |
| memcpy(nlmsg_data(nlh), payload, size); |
| return iscsi_unicast_skb(skb, portid); |
| } |
| |
| static int |
| iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) |
| { |
| struct iscsi_uevent *ev = nlmsg_data(nlh); |
| struct iscsi_stats *stats; |
| struct sk_buff *skbstat; |
| struct iscsi_cls_conn *conn; |
| struct nlmsghdr *nlhstat; |
| struct iscsi_uevent *evstat; |
| struct iscsi_internal *priv; |
| int len = nlmsg_total_size(sizeof(*ev) + |
| sizeof(struct iscsi_stats) + |
| sizeof(struct iscsi_stats_custom) * |
| ISCSI_STATS_CUSTOM_MAX); |
| int err = 0; |
| |
| priv = iscsi_if_transport_lookup(transport); |
| if (!priv) |
| return -EINVAL; |
| |
| conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); |
| if (!conn) |
| return -EEXIST; |
| |
| do { |
| int actual_size; |
| |
| skbstat = alloc_skb(len, GFP_ATOMIC); |
| if (!skbstat) { |
| iscsi_cls_conn_printk(KERN_ERR, conn, "can not " |
| "deliver stats: OOM\n"); |
| return -ENOMEM; |
| } |
| |
| nlhstat = __nlmsg_put(skbstat, 0, 0, 0, |
| (len - sizeof(*nlhstat)), 0); |
| evstat = nlmsg_data(nlhstat); |
| memset(evstat, 0, sizeof(*evstat)); |
| evstat->transport_handle = iscsi_handle(conn->transport); |
| evstat->type = nlh->nlmsg_type; |
| evstat->u.get_stats.cid = |
| ev->u.get_stats.cid; |
| evstat->u.get_stats.sid = |
| ev->u.get_stats.sid; |
| stats = (struct iscsi_stats *) |
| ((char*)evstat + sizeof(*evstat)); |
| memset(stats, 0, sizeof(*stats)); |
| |
| transport->get_stats(conn, stats); |
| actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) + |
| sizeof(struct iscsi_stats) + |
| sizeof(struct iscsi_stats_custom) * |
| stats->custom_length); |
| actual_size -= sizeof(*nlhstat); |
| actual_size = nlmsg_msg_size(actual_size); |
| skb_trim(skbstat, NLMSG_ALIGN(actual_size)); |
| nlhstat->nlmsg_len = actual_size; |
| |
| err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID, |
| GFP_ATOMIC); |
| } while (err < 0 && err != -ECONNREFUSED); |
| |
| return err; |
| } |
| |
| /** |
| * iscsi_session_event - send session destr. completion event |
| * @session: iscsi class session |
| * @event: type of event |
| */ |
| int iscsi_session_event(struct iscsi_cls_session *session, |
| enum iscsi_uevent_e event) |
| { |
| struct iscsi_internal *priv; |
| struct Scsi_Host *shost; |
| struct iscsi_uevent *ev; |
| struct sk_buff *skb; |
| struct nlmsghdr *nlh; |
| int rc, len = nlmsg_total_size(sizeof(*ev)); |
| |
| priv = iscsi_if_transport_lookup(session->transport); |
| if (!priv) |
| return -EINVAL; |
| shost = iscsi_session_to_shost(session); |
| |
| skb = alloc_skb(len, GFP_KERNEL); |
| if (!skb) { |
| iscsi_cls_session_printk(KERN_ERR, session, |
| "Cannot notify userspace of session " |
| "event %u\n", event); |
| return -ENOMEM; |
| } |
| |
| nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); |
| ev = nlmsg_data(nlh); |
| ev->transport_handle = iscsi_handle(session->transport); |
| |
| ev->type = event; |
| switch (event) { |
| case ISCSI_KEVENT_DESTROY_SESSION: |
| ev->r.d_session.host_no = shost->host_no; |
| ev->r.d_session.sid = session->sid; |
| break; |
| case ISCSI_KEVENT_CREATE_SESSION: |
| ev->r.c_session_ret.host_no = shost->host_no; |
| ev->r.c_session_ret.sid = session->sid; |
| break; |
| case ISCSI_KEVENT_UNBIND_SESSION: |
| ev->r.unbind_session.host_no = shost->host_no; |
| ev->r.unbind_session.sid = session->sid; |
| break; |
| default: |
| iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " |
| "%u.\n", event); |
| kfree_skb(skb); |
| return -EINVAL; |
| } |
| |
| /* |
| * this will occur if the daemon is not up, so we just warn |
| * the user and when the daemon is restarted it will handle it |
| */ |
| rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL); |
| if (rc == -ESRCH) |
| iscsi_cls_session_printk(KERN_ERR, session, |
| "Cannot notify userspace of session " |
| "event %u. Check iscsi daemon\n", |
| event); |
| |
| ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n", |
| event, rc); |
| return rc; |
| } |
| EXPORT_SYMBOL_GPL(iscsi_session_event); |
| |
| static int |
| iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, |
| struct iscsi_uevent *ev, pid_t pid, |
| uint32_t initial_cmdsn, uint16_t cmds_max, |
| uint16_t queue_depth) |
| { |
| struct iscsi_transport *transport = priv->iscsi_transport; |
| struct iscsi_cls_session *session; |
| struct Scsi_Host *shost; |
| |
| session = transport->create_session(ep, cmds_max, queue_depth, |
| initial_cmdsn); |
| if (!session) |
| return -ENOMEM; |
| |
| session->creator = pid; |
| shost = iscsi_session_to_shost(session); |
| ev->r.c_session_ret.host_no = shost->host_no; |
| ev->r.c_session_ret.sid = session->sid; |
| ISCSI_DBG_TRANS_SESSION(session, |
| "Completed creating transport session\n"); |
| return 0; |
| } |
| |
| static int |
| iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) |
| { |
| struct iscsi_cls_conn *conn; |
| struct iscsi_cls_session *session; |
| |
| session = iscsi_session_lookup(ev->u.c_conn.sid); |
| if (!session) { |
| printk(KERN_ERR "iscsi: invalid session %d.\n", |
| ev->u.c_conn.sid); |
| return -EINVAL; |
| } |
| |
| conn = transport->create_conn(session, ev->u.c_conn.cid); |
| if (!conn) { |
| iscsi_cls_session_printk(KERN_ERR, session, |
| "couldn't create a new connection."); |
| return -ENOMEM; |
| } |
| |
| ev->r.c_conn_ret.sid = session->sid; |
| ev->r.c_conn_ret.cid = conn->cid; |
| |
| ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n"); |
| return 0; |
| } |
| |
| static int |
| iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) |
| { |
| struct iscsi_cls_conn *conn; |
| |
| conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); |
| if (!conn) |
| return -EINVAL; |
| |
| ISCSI_DBG_TRANS_CONN(conn, "Flushing cleanup during destruction\n"); |
| flush_work(&conn->cleanup_work); |
| ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n"); |
| |
| if (transport->destroy_conn) |
| transport->destroy_conn(conn); |
| return 0; |
| } |
| |
| static int |
| iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) |
| { |
| char *data = (char*)ev + sizeof(*ev); |
| struct iscsi_cls_conn *conn; |
| struct iscsi_cls_session *session; |
| int err = 0, value = 0; |
| |
| if (ev->u.set_param.len > PAGE_SIZE) |
| return -EINVAL; |
| |
| session = iscsi_session_lookup(ev->u.set_param.sid); |
| conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); |
| if (!conn || !session) |
| return -EINVAL; |
| |
| switch (ev->u.set_param.param) { |
| case ISCSI_PARAM_SESS_RECOVERY_TMO: |
| sscanf(data, "%d", &value); |
| if (!session->recovery_tmo_sysfs_override) |
| session->recovery_tmo = value; |
| break; |
| default: |
| if ((conn->state == ISCSI_CONN_BOUND) || |
| (conn->state == ISCSI_CONN_UP)) { |
| err = transport->set_param(conn, ev->u.set_param.param, |
| data, ev->u.set_param.len); |
| } else { |
| return -ENOTCONN; |
| } |
| } |
| |
| return err; |
| } |
| |
| static int iscsi_if_ep_connect(struct iscsi_transport *transport, |
| struct iscsi_uevent *ev, int msg_type) |
| { |
| struct iscsi_endpoint *ep; |
| struct sockaddr *dst_addr; |
| struct Scsi_Host *shost = NULL; |
| int non_blocking, err = 0; |
| |
| if (!transport->ep_connect) |
| return -EINVAL; |
| |
| if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) { |
| shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no); |
| if (!shost) { |
| printk(KERN_ERR "ep connect failed. Could not find " |
| "host no %u\n", |
| ev->u.ep_connect_through_host.host_no); |
| return -ENODEV |