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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/scsi/scsi_transport_fc.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/scsi/scsi_transport_fc.c')
-rw-r--r--drivers/scsi/scsi_transport_fc.c4354
1 files changed, 4354 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c
new file mode 100644
index 000000000..8934160c4
--- /dev/null
+++ b/drivers/scsi/scsi_transport_fc.c
@@ -0,0 +1,4354 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * FiberChannel transport specific attributes exported to sysfs.
+ *
+ * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2004-2007 James Smart, Emulex Corporation
+ * Rewrite for host, target, device, and remote port attributes,
+ * statistics, and service functions...
+ * Add vports, etc
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/bsg-lib.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_transport_fc.h>
+#include <scsi/scsi_cmnd.h>
+#include <net/netlink.h>
+#include <scsi/scsi_netlink_fc.h>
+#include <scsi/scsi_bsg_fc.h>
+#include <uapi/scsi/fc/fc_els.h>
+#include "scsi_priv.h"
+
+static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
+static void fc_vport_sched_delete(struct work_struct *work);
+static int fc_vport_setup(struct Scsi_Host *shost, int channel,
+ struct device *pdev, struct fc_vport_identifiers *ids,
+ struct fc_vport **vport);
+static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
+static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
+static void fc_bsg_remove(struct request_queue *);
+static void fc_bsg_goose_queue(struct fc_rport *);
+static void fc_li_stats_update(u16 event_type,
+ struct fc_fpin_stats *stats);
+static void fc_delivery_stats_update(u32 reason_code,
+ struct fc_fpin_stats *stats);
+static void fc_cn_stats_update(u16 event_type, struct fc_fpin_stats *stats);
+
+/*
+ * Module Parameters
+ */
+
+/*
+ * dev_loss_tmo: the default number of seconds that the FC transport
+ * should insulate the loss of a remote port.
+ * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
+ */
+static unsigned int fc_dev_loss_tmo = 60; /* seconds */
+
+module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(dev_loss_tmo,
+ "Maximum number of seconds that the FC transport should"
+ " insulate the loss of a remote port. Once this value is"
+ " exceeded, the scsi target is removed. Value should be"
+ " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
+ " fast_io_fail_tmo is not set.");
+
+/*
+ * Redefine so that we can have same named attributes in the
+ * sdev/starget/host objects.
+ */
+#define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
+struct device_attribute device_attr_##_prefix##_##_name = \
+ __ATTR(_name,_mode,_show,_store)
+
+#define fc_enum_name_search(title, table_type, table) \
+static const char *get_fc_##title##_name(enum table_type table_key) \
+{ \
+ int i; \
+ char *name = NULL; \
+ \
+ for (i = 0; i < ARRAY_SIZE(table); i++) { \
+ if (table[i].value == table_key) { \
+ name = table[i].name; \
+ break; \
+ } \
+ } \
+ return name; \
+}
+
+#define fc_enum_name_match(title, table_type, table) \
+static int get_fc_##title##_match(const char *table_key, \
+ enum table_type *value) \
+{ \
+ int i; \
+ \
+ for (i = 0; i < ARRAY_SIZE(table); i++) { \
+ if (strncmp(table_key, table[i].name, \
+ table[i].matchlen) == 0) { \
+ *value = table[i].value; \
+ return 0; /* success */ \
+ } \
+ } \
+ return 1; /* failure */ \
+}
+
+
+/* Convert fc_port_type values to ascii string name */
+static struct {
+ enum fc_port_type value;
+ char *name;
+} fc_port_type_names[] = {
+ { FC_PORTTYPE_UNKNOWN, "Unknown" },
+ { FC_PORTTYPE_OTHER, "Other" },
+ { FC_PORTTYPE_NOTPRESENT, "Not Present" },
+ { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" },
+ { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
+ { FC_PORTTYPE_LPORT, "LPort (private loop)" },
+ { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" },
+ { FC_PORTTYPE_NPIV, "NPIV VPORT" },
+};
+fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
+#define FC_PORTTYPE_MAX_NAMELEN 50
+
+/* Reuse fc_port_type enum function for vport_type */
+#define get_fc_vport_type_name get_fc_port_type_name
+
+
+/* Convert fc_host_event_code values to ascii string name */
+static const struct {
+ enum fc_host_event_code value;
+ char *name;
+} fc_host_event_code_names[] = {
+ { FCH_EVT_LIP, "lip" },
+ { FCH_EVT_LINKUP, "link_up" },
+ { FCH_EVT_LINKDOWN, "link_down" },
+ { FCH_EVT_LIPRESET, "lip_reset" },
+ { FCH_EVT_RSCN, "rscn" },
+ { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" },
+ { FCH_EVT_PORT_UNKNOWN, "port_unknown" },
+ { FCH_EVT_PORT_ONLINE, "port_online" },
+ { FCH_EVT_PORT_OFFLINE, "port_offline" },
+ { FCH_EVT_PORT_FABRIC, "port_fabric" },
+ { FCH_EVT_LINK_UNKNOWN, "link_unknown" },
+ { FCH_EVT_LINK_FPIN, "link_FPIN" },
+ { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" },
+};
+fc_enum_name_search(host_event_code, fc_host_event_code,
+ fc_host_event_code_names)
+#define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
+
+
+/* Convert fc_port_state values to ascii string name */
+static struct {
+ enum fc_port_state value;
+ char *name;
+ int matchlen;
+} fc_port_state_names[] = {
+ { FC_PORTSTATE_UNKNOWN, "Unknown", 7},
+ { FC_PORTSTATE_NOTPRESENT, "Not Present", 11 },
+ { FC_PORTSTATE_ONLINE, "Online", 6 },
+ { FC_PORTSTATE_OFFLINE, "Offline", 7 },
+ { FC_PORTSTATE_BLOCKED, "Blocked", 7 },
+ { FC_PORTSTATE_BYPASSED, "Bypassed", 8 },
+ { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics", 11 },
+ { FC_PORTSTATE_LINKDOWN, "Linkdown", 8 },
+ { FC_PORTSTATE_ERROR, "Error", 5 },
+ { FC_PORTSTATE_LOOPBACK, "Loopback", 8 },
+ { FC_PORTSTATE_DELETED, "Deleted", 7 },
+ { FC_PORTSTATE_MARGINAL, "Marginal", 8 },
+};
+fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
+fc_enum_name_match(port_state, fc_port_state, fc_port_state_names)
+#define FC_PORTSTATE_MAX_NAMELEN 20
+
+
+/* Convert fc_vport_state values to ascii string name */
+static struct {
+ enum fc_vport_state value;
+ char *name;
+} fc_vport_state_names[] = {
+ { FC_VPORT_UNKNOWN, "Unknown" },
+ { FC_VPORT_ACTIVE, "Active" },
+ { FC_VPORT_DISABLED, "Disabled" },
+ { FC_VPORT_LINKDOWN, "Linkdown" },
+ { FC_VPORT_INITIALIZING, "Initializing" },
+ { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" },
+ { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" },
+ { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" },
+ { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" },
+ { FC_VPORT_FAILED, "VPort Failed" },
+};
+fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
+#define FC_VPORTSTATE_MAX_NAMELEN 24
+
+/* Reuse fc_vport_state enum function for vport_last_state */
+#define get_fc_vport_last_state_name get_fc_vport_state_name
+
+
+/* Convert fc_tgtid_binding_type values to ascii string name */
+static const struct {
+ enum fc_tgtid_binding_type value;
+ char *name;
+ int matchlen;
+} fc_tgtid_binding_type_names[] = {
+ { FC_TGTID_BIND_NONE, "none", 4 },
+ { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
+ { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
+ { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
+};
+fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
+ fc_tgtid_binding_type_names)
+fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
+ fc_tgtid_binding_type_names)
+#define FC_BINDTYPE_MAX_NAMELEN 30
+
+
+#define fc_bitfield_name_search(title, table) \
+static ssize_t \
+get_fc_##title##_names(u32 table_key, char *buf) \
+{ \
+ char *prefix = ""; \
+ ssize_t len = 0; \
+ int i; \
+ \
+ for (i = 0; i < ARRAY_SIZE(table); i++) { \
+ if (table[i].value & table_key) { \
+ len += sprintf(buf + len, "%s%s", \
+ prefix, table[i].name); \
+ prefix = ", "; \
+ } \
+ } \
+ len += sprintf(buf + len, "\n"); \
+ return len; \
+}
+
+
+/* Convert FC_COS bit values to ascii string name */
+static const struct {
+ u32 value;
+ char *name;
+} fc_cos_names[] = {
+ { FC_COS_CLASS1, "Class 1" },
+ { FC_COS_CLASS2, "Class 2" },
+ { FC_COS_CLASS3, "Class 3" },
+ { FC_COS_CLASS4, "Class 4" },
+ { FC_COS_CLASS6, "Class 6" },
+};
+fc_bitfield_name_search(cos, fc_cos_names)
+
+
+/* Convert FC_PORTSPEED bit values to ascii string name */
+static const struct {
+ u32 value;
+ char *name;
+} fc_port_speed_names[] = {
+ { FC_PORTSPEED_1GBIT, "1 Gbit" },
+ { FC_PORTSPEED_2GBIT, "2 Gbit" },
+ { FC_PORTSPEED_4GBIT, "4 Gbit" },
+ { FC_PORTSPEED_10GBIT, "10 Gbit" },
+ { FC_PORTSPEED_8GBIT, "8 Gbit" },
+ { FC_PORTSPEED_16GBIT, "16 Gbit" },
+ { FC_PORTSPEED_32GBIT, "32 Gbit" },
+ { FC_PORTSPEED_20GBIT, "20 Gbit" },
+ { FC_PORTSPEED_40GBIT, "40 Gbit" },
+ { FC_PORTSPEED_50GBIT, "50 Gbit" },
+ { FC_PORTSPEED_100GBIT, "100 Gbit" },
+ { FC_PORTSPEED_25GBIT, "25 Gbit" },
+ { FC_PORTSPEED_64GBIT, "64 Gbit" },
+ { FC_PORTSPEED_128GBIT, "128 Gbit" },
+ { FC_PORTSPEED_256GBIT, "256 Gbit" },
+ { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" },
+};
+fc_bitfield_name_search(port_speed, fc_port_speed_names)
+
+
+static int
+show_fc_fc4s (char *buf, u8 *fc4_list)
+{
+ int i, len=0;
+
+ for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
+ len += sprintf(buf + len , "0x%02x ", *fc4_list);
+ len += sprintf(buf + len, "\n");
+ return len;
+}
+
+
+/* Convert FC_PORT_ROLE bit values to ascii string name */
+static const struct {
+ u32 value;
+ char *name;
+} fc_port_role_names[] = {
+ { FC_PORT_ROLE_FCP_TARGET, "FCP Target" },
+ { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
+ { FC_PORT_ROLE_IP_PORT, "IP Port" },
+ { FC_PORT_ROLE_FCP_DUMMY_INITIATOR, "FCP Dummy Initiator" },
+ { FC_PORT_ROLE_NVME_INITIATOR, "NVMe Initiator" },
+ { FC_PORT_ROLE_NVME_TARGET, "NVMe Target" },
+ { FC_PORT_ROLE_NVME_DISCOVERY, "NVMe Discovery" },
+};
+fc_bitfield_name_search(port_roles, fc_port_role_names)
+
+/*
+ * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
+ */
+#define FC_WELLKNOWN_PORTID_MASK 0xfffff0
+#define FC_WELLKNOWN_ROLE_MASK 0x00000f
+#define FC_FPORT_PORTID 0x00000e
+#define FC_FABCTLR_PORTID 0x00000d
+#define FC_DIRSRVR_PORTID 0x00000c
+#define FC_TIMESRVR_PORTID 0x00000b
+#define FC_MGMTSRVR_PORTID 0x00000a
+
+
+static void fc_timeout_deleted_rport(struct work_struct *work);
+static void fc_timeout_fail_rport_io(struct work_struct *work);
+static void fc_scsi_scan_rport(struct work_struct *work);
+
+/*
+ * Attribute counts pre object type...
+ * Increase these values if you add attributes
+ */
+#define FC_STARGET_NUM_ATTRS 3
+#define FC_RPORT_NUM_ATTRS 10
+#define FC_VPORT_NUM_ATTRS 9
+#define FC_HOST_NUM_ATTRS 29
+
+struct fc_internal {
+ struct scsi_transport_template t;
+ struct fc_function_template *f;
+
+ /*
+ * For attributes : each object has :
+ * An array of the actual attributes structures
+ * An array of null-terminated pointers to the attribute
+ * structures - used for mid-layer interaction.
+ *
+ * The attribute containers for the starget and host are are
+ * part of the midlayer. As the remote port is specific to the
+ * fc transport, we must provide the attribute container.
+ */
+ struct device_attribute private_starget_attrs[
+ FC_STARGET_NUM_ATTRS];
+ struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
+
+ struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
+ struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
+
+ struct transport_container rport_attr_cont;
+ struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
+ struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
+
+ struct transport_container vport_attr_cont;
+ struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
+ struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
+};
+
+#define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
+
+static int fc_target_setup(struct transport_container *tc, struct device *dev,
+ struct device *cdev)
+{
+ struct scsi_target *starget = to_scsi_target(dev);
+ struct fc_rport *rport = starget_to_rport(starget);
+
+ /*
+ * if parent is remote port, use values from remote port.
+ * Otherwise, this host uses the fc_transport, but not the
+ * remote port interface. As such, initialize to known non-values.
+ */
+ if (rport) {
+ fc_starget_node_name(starget) = rport->node_name;
+ fc_starget_port_name(starget) = rport->port_name;
+ fc_starget_port_id(starget) = rport->port_id;
+ } else {
+ fc_starget_node_name(starget) = -1;
+ fc_starget_port_name(starget) = -1;
+ fc_starget_port_id(starget) = -1;
+ }
+
+ return 0;
+}
+
+static DECLARE_TRANSPORT_CLASS(fc_transport_class,
+ "fc_transport",
+ fc_target_setup,
+ NULL,
+ NULL);
+
+static int fc_host_setup(struct transport_container *tc, struct device *dev,
+ struct device *cdev)
+{
+ struct Scsi_Host *shost = dev_to_shost(dev);
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+
+ /*
+ * Set default values easily detected by the midlayer as
+ * failure cases. The scsi lldd is responsible for initializing
+ * all transport attributes to valid values per host.
+ */
+ fc_host->node_name = -1;
+ fc_host->port_name = -1;
+ fc_host->permanent_port_name = -1;
+ fc_host->supported_classes = FC_COS_UNSPECIFIED;
+ memset(fc_host->supported_fc4s, 0,
+ sizeof(fc_host->supported_fc4s));
+ fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
+ fc_host->maxframe_size = -1;
+ fc_host->max_npiv_vports = 0;
+ memset(fc_host->serial_number, 0,
+ sizeof(fc_host->serial_number));
+ memset(fc_host->manufacturer, 0,
+ sizeof(fc_host->manufacturer));
+ memset(fc_host->model, 0,
+ sizeof(fc_host->model));
+ memset(fc_host->model_description, 0,
+ sizeof(fc_host->model_description));
+ memset(fc_host->hardware_version, 0,
+ sizeof(fc_host->hardware_version));
+ memset(fc_host->driver_version, 0,
+ sizeof(fc_host->driver_version));
+ memset(fc_host->firmware_version, 0,
+ sizeof(fc_host->firmware_version));
+ memset(fc_host->optionrom_version, 0,
+ sizeof(fc_host->optionrom_version));
+
+ fc_host->port_id = -1;
+ fc_host->port_type = FC_PORTTYPE_UNKNOWN;
+ fc_host->port_state = FC_PORTSTATE_UNKNOWN;
+ memset(fc_host->active_fc4s, 0,
+ sizeof(fc_host->active_fc4s));
+ fc_host->speed = FC_PORTSPEED_UNKNOWN;
+ fc_host->fabric_name = -1;
+ memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
+ memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
+ memset(&fc_host->fpin_stats, 0, sizeof(fc_host->fpin_stats));
+
+ fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
+
+ INIT_LIST_HEAD(&fc_host->rports);
+ INIT_LIST_HEAD(&fc_host->rport_bindings);
+ INIT_LIST_HEAD(&fc_host->vports);
+ fc_host->next_rport_number = 0;
+ fc_host->next_target_id = 0;
+ fc_host->next_vport_number = 0;
+ fc_host->npiv_vports_inuse = 0;
+
+ snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
+ "fc_wq_%d", shost->host_no);
+ fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name);
+ if (!fc_host->work_q)
+ return -ENOMEM;
+
+ fc_host->dev_loss_tmo = fc_dev_loss_tmo;
+ snprintf(fc_host->devloss_work_q_name,
+ sizeof(fc_host->devloss_work_q_name),
+ "fc_dl_%d", shost->host_no);
+ fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0,
+ fc_host->devloss_work_q_name);
+ if (!fc_host->devloss_work_q) {
+ destroy_workqueue(fc_host->work_q);
+ fc_host->work_q = NULL;
+ return -ENOMEM;
+ }
+
+ fc_bsg_hostadd(shost, fc_host);
+ /* ignore any bsg add error - we just can't do sgio */
+
+ return 0;
+}
+
+static int fc_host_remove(struct transport_container *tc, struct device *dev,
+ struct device *cdev)
+{
+ struct Scsi_Host *shost = dev_to_shost(dev);
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+
+ fc_bsg_remove(fc_host->rqst_q);
+ return 0;
+}
+
+static DECLARE_TRANSPORT_CLASS(fc_host_class,
+ "fc_host",
+ fc_host_setup,
+ fc_host_remove,
+ NULL);
+
+/*
+ * Setup and Remove actions for remote ports are handled
+ * in the service functions below.
+ */
+static DECLARE_TRANSPORT_CLASS(fc_rport_class,
+ "fc_remote_ports",
+ NULL,
+ NULL,
+ NULL);
+
+/*
+ * Setup and Remove actions for virtual ports are handled
+ * in the service functions below.
+ */
+static DECLARE_TRANSPORT_CLASS(fc_vport_class,
+ "fc_vports",
+ NULL,
+ NULL,
+ NULL);
+
+/*
+ * Netlink Infrastructure
+ */
+
+static atomic_t fc_event_seq;
+
+/**
+ * fc_get_event_number - Obtain the next sequential FC event number
+ *
+ * Notes:
+ * We could have inlined this, but it would have required fc_event_seq to
+ * be exposed. For now, live with the subroutine call.
+ * Atomic used to avoid lock/unlock...
+ */
+u32
+fc_get_event_number(void)
+{
+ return atomic_add_return(1, &fc_event_seq);
+}
+EXPORT_SYMBOL(fc_get_event_number);
+
+/**
+ * fc_host_post_fc_event - routine to do the work of posting an event
+ * on an fc_host.
+ * @shost: host the event occurred on
+ * @event_number: fc event number obtained from get_fc_event_number()
+ * @event_code: fc_host event being posted
+ * @data_len: amount, in bytes, of event data
+ * @data_buf: pointer to event data
+ * @vendor_id: value for Vendor id
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ */
+void
+fc_host_post_fc_event(struct Scsi_Host *shost, u32 event_number,
+ enum fc_host_event_code event_code,
+ u32 data_len, char *data_buf, u64 vendor_id)
+{
+ struct sk_buff *skb;
+ struct nlmsghdr *nlh;
+ struct fc_nl_event *event;
+ const char *name;
+ size_t len, padding;
+ int err;
+
+ if (!data_buf || data_len < 4)
+ data_len = 0;
+
+ if (!scsi_nl_sock) {
+ err = -ENOENT;
+ goto send_fail;
+ }
+
+ len = FC_NL_MSGALIGN(sizeof(*event) - sizeof(event->event_data) + data_len);
+
+ skb = nlmsg_new(len, GFP_KERNEL);
+ if (!skb) {
+ err = -ENOBUFS;
+ goto send_fail;
+ }
+
+ nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
+ if (!nlh) {
+ err = -ENOBUFS;
+ goto send_fail_skb;
+ }
+ event = nlmsg_data(nlh);
+
+ INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
+ FC_NL_ASYNC_EVENT, len);
+ event->seconds = ktime_get_real_seconds();
+ event->vendor_id = vendor_id;
+ event->host_no = shost->host_no;
+ event->event_datalen = data_len; /* bytes */
+ event->event_num = event_number;
+ event->event_code = event_code;
+ if (data_len)
+ memcpy(event->event_data_flex, data_buf, data_len);
+ padding = len - offsetof(typeof(*event), event_data_flex) - data_len;
+ memset(event->event_data_flex + data_len, 0, padding);
+
+ nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
+ GFP_KERNEL);
+ return;
+
+send_fail_skb:
+ kfree_skb(skb);
+send_fail:
+ name = get_fc_host_event_code_name(event_code);
+ printk(KERN_WARNING
+ "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
+ __func__, shost->host_no,
+ (name) ? name : "<unknown>",
+ (data_len) ? *((u32 *)data_buf) : 0xFFFFFFFF, err);
+ return;
+}
+EXPORT_SYMBOL(fc_host_post_fc_event);
+
+/**
+ * fc_host_post_event - called to post an even on an fc_host.
+ * @shost: host the event occurred on
+ * @event_number: fc event number obtained from get_fc_event_number()
+ * @event_code: fc_host event being posted
+ * @event_data: 32bits of data for the event being posted
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ */
+void
+fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
+ enum fc_host_event_code event_code, u32 event_data)
+{
+ fc_host_post_fc_event(shost, event_number, event_code,
+ (u32)sizeof(u32), (char *)&event_data, 0);
+}
+EXPORT_SYMBOL(fc_host_post_event);
+
+
+/**
+ * fc_host_post_vendor_event - called to post a vendor unique event
+ * on an fc_host
+ * @shost: host the event occurred on
+ * @event_number: fc event number obtained from get_fc_event_number()
+ * @data_len: amount, in bytes, of vendor unique data
+ * @data_buf: pointer to vendor unique data
+ * @vendor_id: Vendor id
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ */
+void
+fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
+ u32 data_len, char * data_buf, u64 vendor_id)
+{
+ fc_host_post_fc_event(shost, event_number, FCH_EVT_VENDOR_UNIQUE,
+ data_len, data_buf, vendor_id);
+}
+EXPORT_SYMBOL(fc_host_post_vendor_event);
+
+/**
+ * fc_find_rport_by_wwpn - find the fc_rport pointer for a given wwpn
+ * @shost: host the fc_rport is associated with
+ * @wwpn: wwpn of the fc_rport device
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ */
+struct fc_rport *
+fc_find_rport_by_wwpn(struct Scsi_Host *shost, u64 wwpn)
+{
+ struct fc_rport *rport;
+ unsigned long flags;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+
+ list_for_each_entry(rport, &fc_host_rports(shost), peers) {
+ if (rport->port_state != FC_PORTSTATE_ONLINE)
+ continue;
+
+ if (rport->port_name == wwpn) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ return rport;
+ }
+ }
+
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ return NULL;
+}
+EXPORT_SYMBOL(fc_find_rport_by_wwpn);
+
+static void
+fc_li_stats_update(u16 event_type,
+ struct fc_fpin_stats *stats)
+{
+ stats->li++;
+ switch (event_type) {
+ case FPIN_LI_UNKNOWN:
+ stats->li_failure_unknown++;
+ break;
+ case FPIN_LI_LINK_FAILURE:
+ stats->li_link_failure_count++;
+ break;
+ case FPIN_LI_LOSS_OF_SYNC:
+ stats->li_loss_of_sync_count++;
+ break;
+ case FPIN_LI_LOSS_OF_SIG:
+ stats->li_loss_of_signals_count++;
+ break;
+ case FPIN_LI_PRIM_SEQ_ERR:
+ stats->li_prim_seq_err_count++;
+ break;
+ case FPIN_LI_INVALID_TX_WD:
+ stats->li_invalid_tx_word_count++;
+ break;
+ case FPIN_LI_INVALID_CRC:
+ stats->li_invalid_crc_count++;
+ break;
+ case FPIN_LI_DEVICE_SPEC:
+ stats->li_device_specific++;
+ break;
+ }
+}
+
+static void
+fc_delivery_stats_update(u32 reason_code, struct fc_fpin_stats *stats)
+{
+ stats->dn++;
+ switch (reason_code) {
+ case FPIN_DELI_UNKNOWN:
+ stats->dn_unknown++;
+ break;
+ case FPIN_DELI_TIMEOUT:
+ stats->dn_timeout++;
+ break;
+ case FPIN_DELI_UNABLE_TO_ROUTE:
+ stats->dn_unable_to_route++;
+ break;
+ case FPIN_DELI_DEVICE_SPEC:
+ stats->dn_device_specific++;
+ break;
+ }
+}
+
+static void
+fc_cn_stats_update(u16 event_type, struct fc_fpin_stats *stats)
+{
+ stats->cn++;
+ switch (event_type) {
+ case FPIN_CONGN_CLEAR:
+ stats->cn_clear++;
+ break;
+ case FPIN_CONGN_LOST_CREDIT:
+ stats->cn_lost_credit++;
+ break;
+ case FPIN_CONGN_CREDIT_STALL:
+ stats->cn_credit_stall++;
+ break;
+ case FPIN_CONGN_OVERSUBSCRIPTION:
+ stats->cn_oversubscription++;
+ break;
+ case FPIN_CONGN_DEVICE_SPEC:
+ stats->cn_device_specific++;
+ }
+}
+
+/*
+ * fc_fpin_li_stats_update - routine to update Link Integrity
+ * event statistics.
+ * @shost: host the FPIN was received on
+ * @tlv: pointer to link integrity descriptor
+ *
+ */
+static void
+fc_fpin_li_stats_update(struct Scsi_Host *shost, struct fc_tlv_desc *tlv)
+{
+ u8 i;
+ struct fc_rport *rport = NULL;
+ struct fc_rport *attach_rport = NULL;
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+ struct fc_fn_li_desc *li_desc = (struct fc_fn_li_desc *)tlv;
+ u16 event_type = be16_to_cpu(li_desc->event_type);
+ u64 wwpn;
+
+ rport = fc_find_rport_by_wwpn(shost,
+ be64_to_cpu(li_desc->attached_wwpn));
+ if (rport &&
+ (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
+ rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
+ attach_rport = rport;
+ fc_li_stats_update(event_type, &attach_rport->fpin_stats);
+ }
+
+ if (be32_to_cpu(li_desc->pname_count) > 0) {
+ for (i = 0;
+ i < be32_to_cpu(li_desc->pname_count);
+ i++) {
+ wwpn = be64_to_cpu(li_desc->pname_list[i]);
+ rport = fc_find_rport_by_wwpn(shost, wwpn);
+ if (rport &&
+ (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
+ rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
+ if (rport == attach_rport)
+ continue;
+ fc_li_stats_update(event_type,
+ &rport->fpin_stats);
+ }
+ }
+ }
+
+ if (fc_host->port_name == be64_to_cpu(li_desc->attached_wwpn))
+ fc_li_stats_update(event_type, &fc_host->fpin_stats);
+}
+
+/*
+ * fc_fpin_delivery_stats_update - routine to update Delivery Notification
+ * event statistics.
+ * @shost: host the FPIN was received on
+ * @tlv: pointer to delivery descriptor
+ *
+ */
+static void
+fc_fpin_delivery_stats_update(struct Scsi_Host *shost,
+ struct fc_tlv_desc *tlv)
+{
+ struct fc_rport *rport = NULL;
+ struct fc_rport *attach_rport = NULL;
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+ struct fc_fn_deli_desc *dn_desc = (struct fc_fn_deli_desc *)tlv;
+ u32 reason_code = be32_to_cpu(dn_desc->deli_reason_code);
+
+ rport = fc_find_rport_by_wwpn(shost,
+ be64_to_cpu(dn_desc->attached_wwpn));
+ if (rport &&
+ (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
+ rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
+ attach_rport = rport;
+ fc_delivery_stats_update(reason_code,
+ &attach_rport->fpin_stats);
+ }
+
+ if (fc_host->port_name == be64_to_cpu(dn_desc->attached_wwpn))
+ fc_delivery_stats_update(reason_code, &fc_host->fpin_stats);
+}
+
+/*
+ * fc_fpin_peer_congn_stats_update - routine to update Peer Congestion
+ * event statistics.
+ * @shost: host the FPIN was received on
+ * @tlv: pointer to peer congestion descriptor
+ *
+ */
+static void
+fc_fpin_peer_congn_stats_update(struct Scsi_Host *shost,
+ struct fc_tlv_desc *tlv)
+{
+ u8 i;
+ struct fc_rport *rport = NULL;
+ struct fc_rport *attach_rport = NULL;
+ struct fc_fn_peer_congn_desc *pc_desc =
+ (struct fc_fn_peer_congn_desc *)tlv;
+ u16 event_type = be16_to_cpu(pc_desc->event_type);
+ u64 wwpn;
+
+ rport = fc_find_rport_by_wwpn(shost,
+ be64_to_cpu(pc_desc->attached_wwpn));
+ if (rport &&
+ (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
+ rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
+ attach_rport = rport;
+ fc_cn_stats_update(event_type, &attach_rport->fpin_stats);
+ }
+
+ if (be32_to_cpu(pc_desc->pname_count) > 0) {
+ for (i = 0;
+ i < be32_to_cpu(pc_desc->pname_count);
+ i++) {
+ wwpn = be64_to_cpu(pc_desc->pname_list[i]);
+ rport = fc_find_rport_by_wwpn(shost, wwpn);
+ if (rport &&
+ (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
+ rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
+ if (rport == attach_rport)
+ continue;
+ fc_cn_stats_update(event_type,
+ &rport->fpin_stats);
+ }
+ }
+ }
+}
+
+/*
+ * fc_fpin_congn_stats_update - routine to update Congestion
+ * event statistics.
+ * @shost: host the FPIN was received on
+ * @tlv: pointer to congestion descriptor
+ *
+ */
+static void
+fc_fpin_congn_stats_update(struct Scsi_Host *shost,
+ struct fc_tlv_desc *tlv)
+{
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+ struct fc_fn_congn_desc *congn = (struct fc_fn_congn_desc *)tlv;
+
+ fc_cn_stats_update(be16_to_cpu(congn->event_type),
+ &fc_host->fpin_stats);
+}
+
+/**
+ * fc_host_fpin_rcv - routine to process a received FPIN.
+ * @shost: host the FPIN was received on
+ * @fpin_len: length of FPIN payload, in bytes
+ * @fpin_buf: pointer to FPIN payload
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ */
+void
+fc_host_fpin_rcv(struct Scsi_Host *shost, u32 fpin_len, char *fpin_buf)
+{
+ struct fc_els_fpin *fpin = (struct fc_els_fpin *)fpin_buf;
+ struct fc_tlv_desc *tlv;
+ u32 desc_cnt = 0, bytes_remain;
+ u32 dtag;
+
+ /* Update Statistics */
+ tlv = (struct fc_tlv_desc *)&fpin->fpin_desc[0];
+ bytes_remain = fpin_len - offsetof(struct fc_els_fpin, fpin_desc);
+ bytes_remain = min_t(u32, bytes_remain, be32_to_cpu(fpin->desc_len));
+
+ while (bytes_remain >= FC_TLV_DESC_HDR_SZ &&
+ bytes_remain >= FC_TLV_DESC_SZ_FROM_LENGTH(tlv)) {
+ dtag = be32_to_cpu(tlv->desc_tag);
+ switch (dtag) {
+ case ELS_DTAG_LNK_INTEGRITY:
+ fc_fpin_li_stats_update(shost, tlv);
+ break;
+ case ELS_DTAG_DELIVERY:
+ fc_fpin_delivery_stats_update(shost, tlv);
+ break;
+ case ELS_DTAG_PEER_CONGEST:
+ fc_fpin_peer_congn_stats_update(shost, tlv);
+ break;
+ case ELS_DTAG_CONGESTION:
+ fc_fpin_congn_stats_update(shost, tlv);
+ }
+
+ desc_cnt++;
+ bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv);
+ tlv = fc_tlv_next_desc(tlv);
+ }
+
+ fc_host_post_fc_event(shost, fc_get_event_number(),
+ FCH_EVT_LINK_FPIN, fpin_len, fpin_buf, 0);
+}
+EXPORT_SYMBOL(fc_host_fpin_rcv);
+
+
+static __init int fc_transport_init(void)
+{
+ int error;
+
+ atomic_set(&fc_event_seq, 0);
+
+ error = transport_class_register(&fc_host_class);
+ if (error)
+ return error;
+ error = transport_class_register(&fc_vport_class);
+ if (error)
+ goto unreg_host_class;
+ error = transport_class_register(&fc_rport_class);
+ if (error)
+ goto unreg_vport_class;
+ error = transport_class_register(&fc_transport_class);
+ if (error)
+ goto unreg_rport_class;
+ return 0;
+
+unreg_rport_class:
+ transport_class_unregister(&fc_rport_class);
+unreg_vport_class:
+ transport_class_unregister(&fc_vport_class);
+unreg_host_class:
+ transport_class_unregister(&fc_host_class);
+ return error;
+}
+
+static void __exit fc_transport_exit(void)
+{
+ transport_class_unregister(&fc_transport_class);
+ transport_class_unregister(&fc_rport_class);
+ transport_class_unregister(&fc_host_class);
+ transport_class_unregister(&fc_vport_class);
+}
+
+/*
+ * FC Remote Port Attribute Management
+ */
+
+#define fc_rport_show_function(field, format_string, sz, cast) \
+static ssize_t \
+show_fc_rport_##field (struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct fc_rport *rport = transport_class_to_rport(dev); \
+ struct Scsi_Host *shost = rport_to_shost(rport); \
+ struct fc_internal *i = to_fc_internal(shost->transportt); \
+ if ((i->f->get_rport_##field) && \
+ !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
+ (rport->port_state == FC_PORTSTATE_DELETED) || \
+ (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
+ i->f->get_rport_##field(rport); \
+ return snprintf(buf, sz, format_string, cast rport->field); \
+}
+
+#define fc_rport_store_function(field) \
+static ssize_t \
+store_fc_rport_##field(struct device *dev, \
+ struct device_attribute *attr, \
+ const char *buf, size_t count) \
+{ \
+ int val; \
+ struct fc_rport *rport = transport_class_to_rport(dev); \
+ struct Scsi_Host *shost = rport_to_shost(rport); \
+ struct fc_internal *i = to_fc_internal(shost->transportt); \
+ char *cp; \
+ if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
+ (rport->port_state == FC_PORTSTATE_DELETED) || \
+ (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
+ return -EBUSY; \
+ val = simple_strtoul(buf, &cp, 0); \
+ if (*cp && (*cp != '\n')) \
+ return -EINVAL; \
+ i->f->set_rport_##field(rport, val); \
+ return count; \
+}
+
+#define fc_rport_rd_attr(field, format_string, sz) \
+ fc_rport_show_function(field, format_string, sz, ) \
+static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
+ show_fc_rport_##field, NULL)
+
+#define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
+ fc_rport_show_function(field, format_string, sz, (cast)) \
+static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
+ show_fc_rport_##field, NULL)
+
+#define fc_rport_rw_attr(field, format_string, sz) \
+ fc_rport_show_function(field, format_string, sz, ) \
+ fc_rport_store_function(field) \
+static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
+ show_fc_rport_##field, \
+ store_fc_rport_##field)
+
+
+#define fc_private_rport_show_function(field, format_string, sz, cast) \
+static ssize_t \
+show_fc_rport_##field (struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct fc_rport *rport = transport_class_to_rport(dev); \
+ return snprintf(buf, sz, format_string, cast rport->field); \
+}
+
+#define fc_private_rport_rd_attr(field, format_string, sz) \
+ fc_private_rport_show_function(field, format_string, sz, ) \
+static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
+ show_fc_rport_##field, NULL)
+
+#define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
+ fc_private_rport_show_function(field, format_string, sz, (cast)) \
+static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
+ show_fc_rport_##field, NULL)
+
+
+#define fc_private_rport_rd_enum_attr(title, maxlen) \
+static ssize_t \
+show_fc_rport_##title (struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct fc_rport *rport = transport_class_to_rport(dev); \
+ const char *name; \
+ name = get_fc_##title##_name(rport->title); \
+ if (!name) \
+ return -EINVAL; \
+ return snprintf(buf, maxlen, "%s\n", name); \
+} \
+static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
+ show_fc_rport_##title, NULL)
+
+
+#define SETUP_RPORT_ATTRIBUTE_RD(field) \
+ i->private_rport_attrs[count] = device_attr_rport_##field; \
+ i->private_rport_attrs[count].attr.mode = S_IRUGO; \
+ i->private_rport_attrs[count].store = NULL; \
+ i->rport_attrs[count] = &i->private_rport_attrs[count]; \
+ if (i->f->show_rport_##field) \
+ count++
+
+#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
+ i->private_rport_attrs[count] = device_attr_rport_##field; \
+ i->private_rport_attrs[count].attr.mode = S_IRUGO; \
+ i->private_rport_attrs[count].store = NULL; \
+ i->rport_attrs[count] = &i->private_rport_attrs[count]; \
+ count++
+
+#define SETUP_RPORT_ATTRIBUTE_RW(field) \
+ i->private_rport_attrs[count] = device_attr_rport_##field; \
+ if (!i->f->set_rport_##field) { \
+ i->private_rport_attrs[count].attr.mode = S_IRUGO; \
+ i->private_rport_attrs[count].store = NULL; \
+ } \
+ i->rport_attrs[count] = &i->private_rport_attrs[count]; \
+ if (i->f->show_rport_##field) \
+ count++
+
+#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
+{ \
+ i->private_rport_attrs[count] = device_attr_rport_##field; \
+ i->rport_attrs[count] = &i->private_rport_attrs[count]; \
+ count++; \
+}
+
+
+/* The FC Transport Remote Port Attributes: */
+
+/* Fixed Remote Port Attributes */
+
+fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
+
+static ssize_t
+show_fc_rport_supported_classes (struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fc_rport *rport = transport_class_to_rport(dev);
+ if (rport->supported_classes == FC_COS_UNSPECIFIED)
+ return snprintf(buf, 20, "unspecified\n");
+ return get_fc_cos_names(rport->supported_classes, buf);
+}
+static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
+ show_fc_rport_supported_classes, NULL);
+
+/* Dynamic Remote Port Attributes */
+
+/*
+ * dev_loss_tmo attribute
+ */
+static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
+{
+ char *cp;
+
+ *val = simple_strtoul(buf, &cp, 0);
+ if (*cp && (*cp != '\n'))
+ return -EINVAL;
+ /*
+ * Check for overflow; dev_loss_tmo is u32
+ */
+ if (*val > UINT_MAX)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
+ unsigned long val)
+{
+ struct Scsi_Host *shost = rport_to_shost(rport);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+
+ if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
+ (rport->port_state == FC_PORTSTATE_DELETED) ||
+ (rport->port_state == FC_PORTSTATE_NOTPRESENT))
+ return -EBUSY;
+ /*
+ * Check for overflow; dev_loss_tmo is u32
+ */
+ if (val > UINT_MAX)
+ return -EINVAL;
+
+ /*
+ * If fast_io_fail is off we have to cap
+ * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
+ */
+ if (rport->fast_io_fail_tmo == -1 &&
+ val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
+ return -EINVAL;
+
+ i->f->set_rport_dev_loss_tmo(rport, val);
+ return 0;
+}
+
+fc_rport_show_function(dev_loss_tmo, "%u\n", 20, )
+static ssize_t
+store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fc_rport *rport = transport_class_to_rport(dev);
+ unsigned long val;
+ int rc;
+
+ rc = fc_str_to_dev_loss(buf, &val);
+ if (rc)
+ return rc;
+
+ rc = fc_rport_set_dev_loss_tmo(rport, val);
+ if (rc)
+ return rc;
+ return count;
+}
+static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
+ show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
+
+
+/* Private Remote Port Attributes */
+
+fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
+fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
+fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
+
+static ssize_t
+show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct fc_rport *rport = transport_class_to_rport(dev);
+
+ /* identify any roles that are port_id specific */
+ if ((rport->port_id != -1) &&
+ (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
+ FC_WELLKNOWN_PORTID_MASK) {
+ switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
+ case FC_FPORT_PORTID:
+ return snprintf(buf, 30, "Fabric Port\n");
+ case FC_FABCTLR_PORTID:
+ return snprintf(buf, 30, "Fabric Controller\n");
+ case FC_DIRSRVR_PORTID:
+ return snprintf(buf, 30, "Directory Server\n");
+ case FC_TIMESRVR_PORTID:
+ return snprintf(buf, 30, "Time Server\n");
+ case FC_MGMTSRVR_PORTID:
+ return snprintf(buf, 30, "Management Server\n");
+ default:
+ return snprintf(buf, 30, "Unknown Fabric Entity\n");
+ }
+ } else {
+ if (rport->roles == FC_PORT_ROLE_UNKNOWN)
+ return snprintf(buf, 20, "unknown\n");
+ return get_fc_port_roles_names(rport->roles, buf);
+ }
+}
+static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
+ show_fc_rport_roles, NULL);
+
+static ssize_t fc_rport_set_marginal_state(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fc_rport *rport = transport_class_to_rport(dev);
+ enum fc_port_state port_state;
+ int ret = 0;
+
+ ret = get_fc_port_state_match(buf, &port_state);
+ if (ret)
+ return -EINVAL;
+ if (port_state == FC_PORTSTATE_MARGINAL) {
+ /*
+ * Change the state to Marginal only if the
+ * current rport state is Online
+ * Allow only Online->Marginal
+ */
+ if (rport->port_state == FC_PORTSTATE_ONLINE)
+ rport->port_state = port_state;
+ else
+ return -EINVAL;
+ } else if (port_state == FC_PORTSTATE_ONLINE) {
+ /*
+ * Change the state to Online only if the
+ * current rport state is Marginal
+ * Allow only Marginal->Online
+ */
+ if (rport->port_state == FC_PORTSTATE_MARGINAL)
+ rport->port_state = port_state;
+ else
+ return -EINVAL;
+ } else
+ return -EINVAL;
+ return count;
+}
+
+static ssize_t
+show_fc_rport_port_state(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ const char *name;
+ struct fc_rport *rport = transport_class_to_rport(dev);
+
+ name = get_fc_port_state_name(rport->port_state);
+ if (!name)
+ return -EINVAL;
+
+ return snprintf(buf, 20, "%s\n", name);
+}
+
+static FC_DEVICE_ATTR(rport, port_state, 0444 | 0200,
+ show_fc_rport_port_state, fc_rport_set_marginal_state);
+
+fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
+
+/*
+ * fast_io_fail_tmo attribute
+ */
+static ssize_t
+show_fc_rport_fast_io_fail_tmo (struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fc_rport *rport = transport_class_to_rport(dev);
+
+ if (rport->fast_io_fail_tmo == -1)
+ return snprintf(buf, 5, "off\n");
+ return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
+}
+
+static ssize_t
+store_fc_rport_fast_io_fail_tmo(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t count)
+{
+ int val;
+ char *cp;
+ struct fc_rport *rport = transport_class_to_rport(dev);
+
+ if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
+ (rport->port_state == FC_PORTSTATE_DELETED) ||
+ (rport->port_state == FC_PORTSTATE_NOTPRESENT))
+ return -EBUSY;
+ if (strncmp(buf, "off", 3) == 0)
+ rport->fast_io_fail_tmo = -1;
+ else {
+ val = simple_strtoul(buf, &cp, 0);
+ if ((*cp && (*cp != '\n')) || (val < 0))
+ return -EINVAL;
+ /*
+ * Cap fast_io_fail by dev_loss_tmo or
+ * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
+ */
+ if ((val >= rport->dev_loss_tmo) ||
+ (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
+ return -EINVAL;
+
+ rport->fast_io_fail_tmo = val;
+ }
+ return count;
+}
+static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
+ show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
+
+#define fc_rport_fpin_statistic(name) \
+static ssize_t fc_rport_fpinstat_##name(struct device *cd, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ struct fc_rport *rport = transport_class_to_rport(cd); \
+ \
+ return snprintf(buf, 20, "0x%llx\n", rport->fpin_stats.name); \
+} \
+static FC_DEVICE_ATTR(rport, fpin_##name, 0444, fc_rport_fpinstat_##name, NULL)
+
+fc_rport_fpin_statistic(dn);
+fc_rport_fpin_statistic(dn_unknown);
+fc_rport_fpin_statistic(dn_timeout);
+fc_rport_fpin_statistic(dn_unable_to_route);
+fc_rport_fpin_statistic(dn_device_specific);
+fc_rport_fpin_statistic(cn);
+fc_rport_fpin_statistic(cn_clear);
+fc_rport_fpin_statistic(cn_lost_credit);
+fc_rport_fpin_statistic(cn_credit_stall);
+fc_rport_fpin_statistic(cn_oversubscription);
+fc_rport_fpin_statistic(cn_device_specific);
+fc_rport_fpin_statistic(li);
+fc_rport_fpin_statistic(li_failure_unknown);
+fc_rport_fpin_statistic(li_link_failure_count);
+fc_rport_fpin_statistic(li_loss_of_sync_count);
+fc_rport_fpin_statistic(li_loss_of_signals_count);
+fc_rport_fpin_statistic(li_prim_seq_err_count);
+fc_rport_fpin_statistic(li_invalid_tx_word_count);
+fc_rport_fpin_statistic(li_invalid_crc_count);
+fc_rport_fpin_statistic(li_device_specific);
+
+static struct attribute *fc_rport_statistics_attrs[] = {
+ &device_attr_rport_fpin_dn.attr,
+ &device_attr_rport_fpin_dn_unknown.attr,
+ &device_attr_rport_fpin_dn_timeout.attr,
+ &device_attr_rport_fpin_dn_unable_to_route.attr,
+ &device_attr_rport_fpin_dn_device_specific.attr,
+ &device_attr_rport_fpin_li.attr,
+ &device_attr_rport_fpin_li_failure_unknown.attr,
+ &device_attr_rport_fpin_li_link_failure_count.attr,
+ &device_attr_rport_fpin_li_loss_of_sync_count.attr,
+ &device_attr_rport_fpin_li_loss_of_signals_count.attr,
+ &device_attr_rport_fpin_li_prim_seq_err_count.attr,
+ &device_attr_rport_fpin_li_invalid_tx_word_count.attr,
+ &device_attr_rport_fpin_li_invalid_crc_count.attr,
+ &device_attr_rport_fpin_li_device_specific.attr,
+ &device_attr_rport_fpin_cn.attr,
+ &device_attr_rport_fpin_cn_clear.attr,
+ &device_attr_rport_fpin_cn_lost_credit.attr,
+ &device_attr_rport_fpin_cn_credit_stall.attr,
+ &device_attr_rport_fpin_cn_oversubscription.attr,
+ &device_attr_rport_fpin_cn_device_specific.attr,
+ NULL
+};
+
+static struct attribute_group fc_rport_statistics_group = {
+ .name = "statistics",
+ .attrs = fc_rport_statistics_attrs,
+};
+
+
+/*
+ * FC SCSI Target Attribute Management
+ */
+
+/*
+ * Note: in the target show function we recognize when the remote
+ * port is in the hierarchy and do not allow the driver to get
+ * involved in sysfs functions. The driver only gets involved if
+ * it's the "old" style that doesn't use rports.
+ */
+#define fc_starget_show_function(field, format_string, sz, cast) \
+static ssize_t \
+show_fc_starget_##field (struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct scsi_target *starget = transport_class_to_starget(dev); \
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
+ struct fc_internal *i = to_fc_internal(shost->transportt); \
+ struct fc_rport *rport = starget_to_rport(starget); \
+ if (rport) \
+ fc_starget_##field(starget) = rport->field; \
+ else if (i->f->get_starget_##field) \
+ i->f->get_starget_##field(starget); \
+ return snprintf(buf, sz, format_string, \
+ cast fc_starget_##field(starget)); \
+}
+
+#define fc_starget_rd_attr(field, format_string, sz) \
+ fc_starget_show_function(field, format_string, sz, ) \
+static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
+ show_fc_starget_##field, NULL)
+
+#define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
+ fc_starget_show_function(field, format_string, sz, (cast)) \
+static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
+ show_fc_starget_##field, NULL)
+
+#define SETUP_STARGET_ATTRIBUTE_RD(field) \
+ i->private_starget_attrs[count] = device_attr_starget_##field; \
+ i->private_starget_attrs[count].attr.mode = S_IRUGO; \
+ i->private_starget_attrs[count].store = NULL; \
+ i->starget_attrs[count] = &i->private_starget_attrs[count]; \
+ if (i->f->show_starget_##field) \
+ count++
+
+#define SETUP_STARGET_ATTRIBUTE_RW(field) \
+ i->private_starget_attrs[count] = device_attr_starget_##field; \
+ if (!i->f->set_starget_##field) { \
+ i->private_starget_attrs[count].attr.mode = S_IRUGO; \
+ i->private_starget_attrs[count].store = NULL; \
+ } \
+ i->starget_attrs[count] = &i->private_starget_attrs[count]; \
+ if (i->f->show_starget_##field) \
+ count++
+
+/* The FC Transport SCSI Target Attributes: */
+fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
+fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
+fc_starget_rd_attr(port_id, "0x%06x\n", 20);
+
+
+/*
+ * FC Virtual Port Attribute Management
+ */
+
+#define fc_vport_show_function(field, format_string, sz, cast) \
+static ssize_t \
+show_fc_vport_##field (struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct fc_vport *vport = transport_class_to_vport(dev); \
+ struct Scsi_Host *shost = vport_to_shost(vport); \
+ struct fc_internal *i = to_fc_internal(shost->transportt); \
+ if ((i->f->get_vport_##field) && \
+ !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
+ i->f->get_vport_##field(vport); \
+ return snprintf(buf, sz, format_string, cast vport->field); \
+}
+
+#define fc_vport_store_function(field) \
+static ssize_t \
+store_fc_vport_##field(struct device *dev, \
+ struct device_attribute *attr, \
+ const char *buf, size_t count) \
+{ \
+ int val; \
+ struct fc_vport *vport = transport_class_to_vport(dev); \
+ struct Scsi_Host *shost = vport_to_shost(vport); \
+ struct fc_internal *i = to_fc_internal(shost->transportt); \
+ char *cp; \
+ if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
+ return -EBUSY; \
+ val = simple_strtoul(buf, &cp, 0); \
+ if (*cp && (*cp != '\n')) \
+ return -EINVAL; \
+ i->f->set_vport_##field(vport, val); \
+ return count; \
+}
+
+#define fc_vport_store_str_function(field, slen) \
+static ssize_t \
+store_fc_vport_##field(struct device *dev, \
+ struct device_attribute *attr, \
+ const char *buf, size_t count) \
+{ \
+ struct fc_vport *vport = transport_class_to_vport(dev); \
+ struct Scsi_Host *shost = vport_to_shost(vport); \
+ struct fc_internal *i = to_fc_internal(shost->transportt); \
+ unsigned int cnt=count; \
+ \
+ /* count may include a LF at end of string */ \
+ if (buf[cnt-1] == '\n') \
+ cnt--; \
+ if (cnt > ((slen) - 1)) \
+ return -EINVAL; \
+ memcpy(vport->field, buf, cnt); \
+ i->f->set_vport_##field(vport); \
+ return count; \
+}
+
+#define fc_vport_rd_attr(field, format_string, sz) \
+ fc_vport_show_function(field, format_string, sz, ) \
+static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
+ show_fc_vport_##field, NULL)
+
+#define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
+ fc_vport_show_function(field, format_string, sz, (cast)) \
+static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
+ show_fc_vport_##field, NULL)
+
+#define fc_vport_rw_attr(field, format_string, sz) \
+ fc_vport_show_function(field, format_string, sz, ) \
+ fc_vport_store_function(field) \
+static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
+ show_fc_vport_##field, \
+ store_fc_vport_##field)
+
+#define fc_private_vport_show_function(field, format_string, sz, cast) \
+static ssize_t \
+show_fc_vport_##field (struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct fc_vport *vport = transport_class_to_vport(dev); \
+ return snprintf(buf, sz, format_string, cast vport->field); \
+}
+
+#define fc_private_vport_store_u32_function(field) \
+static ssize_t \
+store_fc_vport_##field(struct device *dev, \
+ struct device_attribute *attr, \
+ const char *buf, size_t count) \
+{ \
+ u32 val; \
+ struct fc_vport *vport = transport_class_to_vport(dev); \
+ char *cp; \
+ if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
+ return -EBUSY; \
+ val = simple_strtoul(buf, &cp, 0); \
+ if (*cp && (*cp != '\n')) \
+ return -EINVAL; \
+ vport->field = val; \
+ return count; \
+}
+
+
+#define fc_private_vport_rd_attr(field, format_string, sz) \
+ fc_private_vport_show_function(field, format_string, sz, ) \
+static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
+ show_fc_vport_##field, NULL)
+
+#define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
+ fc_private_vport_show_function(field, format_string, sz, (cast)) \
+static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
+ show_fc_vport_##field, NULL)
+
+#define fc_private_vport_rw_u32_attr(field, format_string, sz) \
+ fc_private_vport_show_function(field, format_string, sz, ) \
+ fc_private_vport_store_u32_function(field) \
+static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
+ show_fc_vport_##field, \
+ store_fc_vport_##field)
+
+
+#define fc_private_vport_rd_enum_attr(title, maxlen) \
+static ssize_t \
+show_fc_vport_##title (struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ struct fc_vport *vport = transport_class_to_vport(dev); \
+ const char *name; \
+ name = get_fc_##title##_name(vport->title); \
+ if (!name) \
+ return -EINVAL; \
+ return snprintf(buf, maxlen, "%s\n", name); \
+} \
+static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
+ show_fc_vport_##title, NULL)
+
+
+#define SETUP_VPORT_ATTRIBUTE_RD(field) \
+ i->private_vport_attrs[count] = device_attr_vport_##field; \
+ i->private_vport_attrs[count].attr.mode = S_IRUGO; \
+ i->private_vport_attrs[count].store = NULL; \
+ i->vport_attrs[count] = &i->private_vport_attrs[count]; \
+ if (i->f->get_##field) \
+ count++
+ /* NOTE: Above MACRO differs: checks function not show bit */
+
+#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
+ i->private_vport_attrs[count] = device_attr_vport_##field; \
+ i->private_vport_attrs[count].attr.mode = S_IRUGO; \
+ i->private_vport_attrs[count].store = NULL; \
+ i->vport_attrs[count] = &i->private_vport_attrs[count]; \
+ count++
+
+#define SETUP_VPORT_ATTRIBUTE_WR(field) \
+ i->private_vport_attrs[count] = device_attr_vport_##field; \
+ i->vport_attrs[count] = &i->private_vport_attrs[count]; \
+ if (i->f->field) \
+ count++
+ /* NOTE: Above MACRO differs: checks function */
+
+#define SETUP_VPORT_ATTRIBUTE_RW(field) \
+ i->private_vport_attrs[count] = device_attr_vport_##field; \
+ if (!i->f->set_vport_##field) { \
+ i->private_vport_attrs[count].attr.mode = S_IRUGO; \
+ i->private_vport_attrs[count].store = NULL; \
+ } \
+ i->vport_attrs[count] = &i->private_vport_attrs[count]; \
+ count++
+ /* NOTE: Above MACRO differs: does not check show bit */
+
+#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
+{ \
+ i->private_vport_attrs[count] = device_attr_vport_##field; \
+ i->vport_attrs[count] = &i->private_vport_attrs[count]; \
+ count++; \
+}
+
+
+/* The FC Transport Virtual Port Attributes: */
+
+/* Fixed Virtual Port Attributes */
+
+/* Dynamic Virtual Port Attributes */
+
+/* Private Virtual Port Attributes */
+
+fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
+fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
+fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
+fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
+
+static ssize_t
+show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct fc_vport *vport = transport_class_to_vport(dev);
+
+ if (vport->roles == FC_PORT_ROLE_UNKNOWN)
+ return snprintf(buf, 20, "unknown\n");
+ return get_fc_port_roles_names(vport->roles, buf);
+}
+static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
+
+fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
+
+fc_private_vport_show_function(symbolic_name, "%s\n",
+ FC_VPORT_SYMBOLIC_NAMELEN + 1, )
+fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
+static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
+ show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
+
+static ssize_t
+store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fc_vport *vport = transport_class_to_vport(dev);
+ struct Scsi_Host *shost = vport_to_shost(vport);
+ unsigned long flags;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+ if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ return -EBUSY;
+ }
+ vport->flags |= FC_VPORT_DELETING;
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ fc_queue_work(shost, &vport->vport_delete_work);
+ return count;
+}
+static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
+ NULL, store_fc_vport_delete);
+
+
+/*
+ * Enable/Disable vport
+ * Write "1" to disable, write "0" to enable
+ */
+static ssize_t
+store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct fc_vport *vport = transport_class_to_vport(dev);
+ struct Scsi_Host *shost = vport_to_shost(vport);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ int stat;
+
+ if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
+ return -EBUSY;
+
+ if (*buf == '0') {
+ if (vport->vport_state != FC_VPORT_DISABLED)
+ return -EALREADY;
+ } else if (*buf == '1') {
+ if (vport->vport_state == FC_VPORT_DISABLED)
+ return -EALREADY;
+ } else
+ return -EINVAL;
+
+ stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
+ return stat ? stat : count;
+}
+static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
+ NULL, store_fc_vport_disable);
+
+
+/*
+ * Host Attribute Management
+ */
+
+#define fc_host_show_function(field, format_string, sz, cast) \
+static ssize_t \
+show_fc_host_##field (struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct Scsi_Host *shost = transport_class_to_shost(dev); \
+ struct fc_internal *i = to_fc_internal(shost->transportt); \
+ if (i->f->get_host_##field) \
+ i->f->get_host_##field(shost); \
+ return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
+}
+
+#define fc_host_store_function(field) \
+static ssize_t \
+store_fc_host_##field(struct device *dev, \
+ struct device_attribute *attr, \
+ const char *buf, size_t count) \
+{ \
+ int val; \
+ struct Scsi_Host *shost = transport_class_to_shost(dev); \
+ struct fc_internal *i = to_fc_internal(shost->transportt); \
+ char *cp; \
+ \
+ val = simple_strtoul(buf, &cp, 0); \
+ if (*cp && (*cp != '\n')) \
+ return -EINVAL; \
+ i->f->set_host_##field(shost, val); \
+ return count; \
+}
+
+#define fc_host_store_str_function(field, slen) \
+static ssize_t \
+store_fc_host_##field(struct device *dev, \
+ struct device_attribute *attr, \
+ const char *buf, size_t count) \
+{ \
+ struct Scsi_Host *shost = transport_class_to_shost(dev); \
+ struct fc_internal *i = to_fc_internal(shost->transportt); \
+ unsigned int cnt=count; \
+ \
+ /* count may include a LF at end of string */ \
+ if (buf[cnt-1] == '\n') \
+ cnt--; \
+ if (cnt > ((slen) - 1)) \
+ return -EINVAL; \
+ memcpy(fc_host_##field(shost), buf, cnt); \
+ i->f->set_host_##field(shost); \
+ return count; \
+}
+
+#define fc_host_rd_attr(field, format_string, sz) \
+ fc_host_show_function(field, format_string, sz, ) \
+static FC_DEVICE_ATTR(host, field, S_IRUGO, \
+ show_fc_host_##field, NULL)
+
+#define fc_host_rd_attr_cast(field, format_string, sz, cast) \
+ fc_host_show_function(field, format_string, sz, (cast)) \
+static FC_DEVICE_ATTR(host, field, S_IRUGO, \
+ show_fc_host_##field, NULL)
+
+#define fc_host_rw_attr(field, format_string, sz) \
+ fc_host_show_function(field, format_string, sz, ) \
+ fc_host_store_function(field) \
+static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
+ show_fc_host_##field, \
+ store_fc_host_##field)
+
+#define fc_host_rd_enum_attr(title, maxlen) \
+static ssize_t \
+show_fc_host_##title (struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct Scsi_Host *shost = transport_class_to_shost(dev); \
+ struct fc_internal *i = to_fc_internal(shost->transportt); \
+ const char *name; \
+ if (i->f->get_host_##title) \
+ i->f->get_host_##title(shost); \
+ name = get_fc_##title##_name(fc_host_##title(shost)); \
+ if (!name) \
+ return -EINVAL; \
+ return snprintf(buf, maxlen, "%s\n", name); \
+} \
+static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
+
+#define SETUP_HOST_ATTRIBUTE_RD(field) \
+ i->private_host_attrs[count] = device_attr_host_##field; \
+ i->private_host_attrs[count].attr.mode = S_IRUGO; \
+ i->private_host_attrs[count].store = NULL; \
+ i->host_attrs[count] = &i->private_host_attrs[count]; \
+ if (i->f->show_host_##field) \
+ count++
+
+#define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
+ i->private_host_attrs[count] = device_attr_host_##field; \
+ i->private_host_attrs[count].attr.mode = S_IRUGO; \
+ i->private_host_attrs[count].store = NULL; \
+ i->host_attrs[count] = &i->private_host_attrs[count]; \
+ count++
+
+#define SETUP_HOST_ATTRIBUTE_RW(field) \
+ i->private_host_attrs[count] = device_attr_host_##field; \
+ if (!i->f->set_host_##field) { \
+ i->private_host_attrs[count].attr.mode = S_IRUGO; \
+ i->private_host_attrs[count].store = NULL; \
+ } \
+ i->host_attrs[count] = &i->private_host_attrs[count]; \
+ if (i->f->show_host_##field) \
+ count++
+
+
+#define fc_private_host_show_function(field, format_string, sz, cast) \
+static ssize_t \
+show_fc_host_##field (struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct Scsi_Host *shost = transport_class_to_shost(dev); \
+ return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
+}
+
+#define fc_private_host_rd_attr(field, format_string, sz) \
+ fc_private_host_show_function(field, format_string, sz, ) \
+static FC_DEVICE_ATTR(host, field, S_IRUGO, \
+ show_fc_host_##field, NULL)
+
+#define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
+ fc_private_host_show_function(field, format_string, sz, (cast)) \
+static FC_DEVICE_ATTR(host, field, S_IRUGO, \
+ show_fc_host_##field, NULL)
+
+#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
+ i->private_host_attrs[count] = device_attr_host_##field; \
+ i->private_host_attrs[count].attr.mode = S_IRUGO; \
+ i->private_host_attrs[count].store = NULL; \
+ i->host_attrs[count] = &i->private_host_attrs[count]; \
+ count++
+
+#define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
+{ \
+ i->private_host_attrs[count] = device_attr_host_##field; \
+ i->host_attrs[count] = &i->private_host_attrs[count]; \
+ count++; \
+}
+
+
+/* Fixed Host Attributes */
+
+static ssize_t
+show_fc_host_supported_classes (struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(dev);
+
+ if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
+ return snprintf(buf, 20, "unspecified\n");
+
+ return get_fc_cos_names(fc_host_supported_classes(shost), buf);
+}
+static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
+ show_fc_host_supported_classes, NULL);
+
+static ssize_t
+show_fc_host_supported_fc4s (struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(dev);
+ return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
+}
+static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
+ show_fc_host_supported_fc4s, NULL);
+
+static ssize_t
+show_fc_host_supported_speeds (struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(dev);
+
+ if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
+ return snprintf(buf, 20, "unknown\n");
+
+ return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
+}
+static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
+ show_fc_host_supported_speeds, NULL);
+
+
+fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
+fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
+fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
+ unsigned long long);
+fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
+fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
+fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
+fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
+fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
+fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
+fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
+fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
+fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
+fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
+
+
+/* Dynamic Host Attributes */
+
+static ssize_t
+show_fc_host_active_fc4s (struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(dev);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+
+ if (i->f->get_host_active_fc4s)
+ i->f->get_host_active_fc4s(shost);
+
+ return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
+}
+static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
+ show_fc_host_active_fc4s, NULL);
+
+static ssize_t
+show_fc_host_speed (struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(dev);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+
+ if (i->f->get_host_speed)
+ i->f->get_host_speed(shost);
+
+ if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
+ return snprintf(buf, 20, "unknown\n");
+
+ return get_fc_port_speed_names(fc_host_speed(shost), buf);
+}
+static FC_DEVICE_ATTR(host, speed, S_IRUGO,
+ show_fc_host_speed, NULL);
+
+
+fc_host_rd_attr(port_id, "0x%06x\n", 20);
+fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
+fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
+fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
+fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
+
+fc_private_host_show_function(system_hostname, "%s\n",
+ FC_SYMBOLIC_NAME_SIZE + 1, )
+fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
+static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
+ show_fc_host_system_hostname, store_fc_host_system_hostname);
+
+
+/* Private Host Attributes */
+
+static ssize_t
+show_fc_private_host_tgtid_bind_type(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(dev);
+ const char *name;
+
+ name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
+ if (!name)
+ return -EINVAL;
+ return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
+}
+
+#define get_list_head_entry(pos, head, member) \
+ pos = list_entry((head)->next, typeof(*pos), member)
+
+static ssize_t
+store_fc_private_host_tgtid_bind_type(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(dev);
+ struct fc_rport *rport;
+ enum fc_tgtid_binding_type val;
+ unsigned long flags;
+
+ if (get_fc_tgtid_bind_type_match(buf, &val))
+ return -EINVAL;
+
+ /* if changing bind type, purge all unused consistent bindings */
+ if (val != fc_host_tgtid_bind_type(shost)) {
+ spin_lock_irqsave(shost->host_lock, flags);
+ while (!list_empty(&fc_host_rport_bindings(shost))) {
+ get_list_head_entry(rport,
+ &fc_host_rport_bindings(shost), peers);
+ list_del(&rport->peers);
+ rport->port_state = FC_PORTSTATE_DELETED;
+ fc_queue_work(shost, &rport->rport_delete_work);
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ }
+
+ fc_host_tgtid_bind_type(shost) = val;
+ return count;
+}
+
+static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
+ show_fc_private_host_tgtid_bind_type,
+ store_fc_private_host_tgtid_bind_type);
+
+static ssize_t
+store_fc_private_host_issue_lip(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(dev);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ int ret;
+
+ /* ignore any data value written to the attribute */
+ if (i->f->issue_fc_host_lip) {
+ ret = i->f->issue_fc_host_lip(shost);
+ return ret ? ret: count;
+ }
+
+ return -ENOENT;
+}
+
+static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
+ store_fc_private_host_issue_lip);
+
+static ssize_t
+store_fc_private_host_dev_loss_tmo(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(dev);
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+ struct fc_rport *rport;
+ unsigned long val, flags;
+ int rc;
+
+ rc = fc_str_to_dev_loss(buf, &val);
+ if (rc)
+ return rc;
+
+ fc_host_dev_loss_tmo(shost) = val;
+ spin_lock_irqsave(shost->host_lock, flags);
+ list_for_each_entry(rport, &fc_host->rports, peers)
+ fc_rport_set_dev_loss_tmo(rport, val);
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ return count;
+}
+
+fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
+static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
+ show_fc_host_dev_loss_tmo,
+ store_fc_private_host_dev_loss_tmo);
+
+fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
+
+/*
+ * Host Statistics Management
+ */
+
+/* Show a given attribute in the statistics group */
+static ssize_t
+fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(dev);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ struct fc_host_statistics *stats;
+ ssize_t ret = -ENOENT;
+
+ if (offset > sizeof(struct fc_host_statistics) ||
+ offset % sizeof(u64) != 0)
+ WARN_ON(1);
+
+ if (i->f->get_fc_host_stats) {
+ stats = (i->f->get_fc_host_stats)(shost);
+ if (stats)
+ ret = snprintf(buf, 20, "0x%llx\n",
+ (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
+ }
+ return ret;
+}
+
+
+/* generate a read-only statistics attribute */
+#define fc_host_statistic(name) \
+static ssize_t show_fcstat_##name(struct device *cd, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ return fc_stat_show(cd, buf, \
+ offsetof(struct fc_host_statistics, name)); \
+} \
+static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
+
+fc_host_statistic(seconds_since_last_reset);
+fc_host_statistic(tx_frames);
+fc_host_statistic(tx_words);
+fc_host_statistic(rx_frames);
+fc_host_statistic(rx_words);
+fc_host_statistic(lip_count);
+fc_host_statistic(nos_count);
+fc_host_statistic(error_frames);
+fc_host_statistic(dumped_frames);
+fc_host_statistic(link_failure_count);
+fc_host_statistic(loss_of_sync_count);
+fc_host_statistic(loss_of_signal_count);
+fc_host_statistic(prim_seq_protocol_err_count);
+fc_host_statistic(invalid_tx_word_count);
+fc_host_statistic(invalid_crc_count);
+fc_host_statistic(fcp_input_requests);
+fc_host_statistic(fcp_output_requests);
+fc_host_statistic(fcp_control_requests);
+fc_host_statistic(fcp_input_megabytes);
+fc_host_statistic(fcp_output_megabytes);
+fc_host_statistic(fcp_packet_alloc_failures);
+fc_host_statistic(fcp_packet_aborts);
+fc_host_statistic(fcp_frame_alloc_failures);
+fc_host_statistic(fc_no_free_exch);
+fc_host_statistic(fc_no_free_exch_xid);
+fc_host_statistic(fc_xid_not_found);
+fc_host_statistic(fc_xid_busy);
+fc_host_statistic(fc_seq_not_found);
+fc_host_statistic(fc_non_bls_resp);
+fc_host_statistic(cn_sig_warn);
+fc_host_statistic(cn_sig_alarm);
+
+
+#define fc_host_fpin_statistic(name) \
+static ssize_t fc_host_fpinstat_##name(struct device *cd, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ struct Scsi_Host *shost = transport_class_to_shost(cd); \
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost); \
+ \
+ return snprintf(buf, 20, "0x%llx\n", fc_host->fpin_stats.name); \
+} \
+static FC_DEVICE_ATTR(host, fpin_##name, 0444, fc_host_fpinstat_##name, NULL)
+
+fc_host_fpin_statistic(dn);
+fc_host_fpin_statistic(dn_unknown);
+fc_host_fpin_statistic(dn_timeout);
+fc_host_fpin_statistic(dn_unable_to_route);
+fc_host_fpin_statistic(dn_device_specific);
+fc_host_fpin_statistic(cn);
+fc_host_fpin_statistic(cn_clear);
+fc_host_fpin_statistic(cn_lost_credit);
+fc_host_fpin_statistic(cn_credit_stall);
+fc_host_fpin_statistic(cn_oversubscription);
+fc_host_fpin_statistic(cn_device_specific);
+fc_host_fpin_statistic(li);
+fc_host_fpin_statistic(li_failure_unknown);
+fc_host_fpin_statistic(li_link_failure_count);
+fc_host_fpin_statistic(li_loss_of_sync_count);
+fc_host_fpin_statistic(li_loss_of_signals_count);
+fc_host_fpin_statistic(li_prim_seq_err_count);
+fc_host_fpin_statistic(li_invalid_tx_word_count);
+fc_host_fpin_statistic(li_invalid_crc_count);
+fc_host_fpin_statistic(li_device_specific);
+
+static ssize_t
+fc_reset_statistics(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(dev);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+
+ /* ignore any data value written to the attribute */
+ if (i->f->reset_fc_host_stats) {
+ i->f->reset_fc_host_stats(shost);
+ return count;
+ }
+
+ return -ENOENT;
+}
+static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
+ fc_reset_statistics);
+
+static struct attribute *fc_statistics_attrs[] = {
+ &device_attr_host_seconds_since_last_reset.attr,
+ &device_attr_host_tx_frames.attr,
+ &device_attr_host_tx_words.attr,
+ &device_attr_host_rx_frames.attr,
+ &device_attr_host_rx_words.attr,
+ &device_attr_host_lip_count.attr,
+ &device_attr_host_nos_count.attr,
+ &device_attr_host_error_frames.attr,
+ &device_attr_host_dumped_frames.attr,
+ &device_attr_host_link_failure_count.attr,
+ &device_attr_host_loss_of_sync_count.attr,
+ &device_attr_host_loss_of_signal_count.attr,
+ &device_attr_host_prim_seq_protocol_err_count.attr,
+ &device_attr_host_invalid_tx_word_count.attr,
+ &device_attr_host_invalid_crc_count.attr,
+ &device_attr_host_fcp_input_requests.attr,
+ &device_attr_host_fcp_output_requests.attr,
+ &device_attr_host_fcp_control_requests.attr,
+ &device_attr_host_fcp_input_megabytes.attr,
+ &device_attr_host_fcp_output_megabytes.attr,
+ &device_attr_host_fcp_packet_alloc_failures.attr,
+ &device_attr_host_fcp_packet_aborts.attr,
+ &device_attr_host_fcp_frame_alloc_failures.attr,
+ &device_attr_host_fc_no_free_exch.attr,
+ &device_attr_host_fc_no_free_exch_xid.attr,
+ &device_attr_host_fc_xid_not_found.attr,
+ &device_attr_host_fc_xid_busy.attr,
+ &device_attr_host_fc_seq_not_found.attr,
+ &device_attr_host_fc_non_bls_resp.attr,
+ &device_attr_host_cn_sig_warn.attr,
+ &device_attr_host_cn_sig_alarm.attr,
+ &device_attr_host_reset_statistics.attr,
+ &device_attr_host_fpin_dn.attr,
+ &device_attr_host_fpin_dn_unknown.attr,
+ &device_attr_host_fpin_dn_timeout.attr,
+ &device_attr_host_fpin_dn_unable_to_route.attr,
+ &device_attr_host_fpin_dn_device_specific.attr,
+ &device_attr_host_fpin_li.attr,
+ &device_attr_host_fpin_li_failure_unknown.attr,
+ &device_attr_host_fpin_li_link_failure_count.attr,
+ &device_attr_host_fpin_li_loss_of_sync_count.attr,
+ &device_attr_host_fpin_li_loss_of_signals_count.attr,
+ &device_attr_host_fpin_li_prim_seq_err_count.attr,
+ &device_attr_host_fpin_li_invalid_tx_word_count.attr,
+ &device_attr_host_fpin_li_invalid_crc_count.attr,
+ &device_attr_host_fpin_li_device_specific.attr,
+ &device_attr_host_fpin_cn.attr,
+ &device_attr_host_fpin_cn_clear.attr,
+ &device_attr_host_fpin_cn_lost_credit.attr,
+ &device_attr_host_fpin_cn_credit_stall.attr,
+ &device_attr_host_fpin_cn_oversubscription.attr,
+ &device_attr_host_fpin_cn_device_specific.attr,
+ NULL
+};
+
+static struct attribute_group fc_statistics_group = {
+ .name = "statistics",
+ .attrs = fc_statistics_attrs,
+};
+
+
+/* Host Vport Attributes */
+
+static int
+fc_parse_wwn(const char *ns, u64 *nm)
+{
+ unsigned int i, j;
+ u8 wwn[8];
+
+ memset(wwn, 0, sizeof(wwn));
+
+ /* Validate and store the new name */
+ for (i=0, j=0; i < 16; i++) {
+ int value;
+
+ value = hex_to_bin(*ns++);
+ if (value >= 0)
+ j = (j << 4) | value;
+ else
+ return -EINVAL;
+ if (i % 2) {
+ wwn[i/2] = j & 0xff;
+ j = 0;
+ }
+ }
+
+ *nm = wwn_to_u64(wwn);
+
+ return 0;
+}
+
+
+/*
+ * "Short-cut" sysfs variable to create a new vport on a FC Host.
+ * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
+ * will default to a NPIV-based FCP_Initiator; The WWNs are specified
+ * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
+ */
+static ssize_t
+store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(dev);
+ struct fc_vport_identifiers vid;
+ struct fc_vport *vport;
+ unsigned int cnt=count;
+ int stat;
+
+ memset(&vid, 0, sizeof(vid));
+
+ /* count may include a LF at end of string */
+ if (buf[cnt-1] == '\n')
+ cnt--;
+
+ /* validate we have enough characters for WWPN */
+ if ((cnt != (16+1+16)) || (buf[16] != ':'))
+ return -EINVAL;
+
+ stat = fc_parse_wwn(&buf[0], &vid.port_name);
+ if (stat)
+ return stat;
+
+ stat = fc_parse_wwn(&buf[17], &vid.node_name);
+ if (stat)
+ return stat;
+
+ vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
+ vid.vport_type = FC_PORTTYPE_NPIV;
+ /* vid.symbolic_name is already zero/NULL's */
+ vid.disable = false; /* always enabled */
+
+ /* we only allow support on Channel 0 !!! */
+ stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
+ return stat ? stat : count;
+}
+static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
+ store_fc_host_vport_create);
+
+
+/*
+ * "Short-cut" sysfs variable to delete a vport on a FC Host.
+ * Vport is identified by a string containing "<WWPN>:<WWNN>".
+ * The WWNs are specified as hex characters, and may *not* contain
+ * any prefixes (e.g. 0x, x, etc)
+ */
+static ssize_t
+store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(dev);
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+ struct fc_vport *vport;
+ u64 wwpn, wwnn;
+ unsigned long flags;
+ unsigned int cnt=count;
+ int stat, match;
+
+ /* count may include a LF at end of string */
+ if (buf[cnt-1] == '\n')
+ cnt--;
+
+ /* validate we have enough characters for WWPN */
+ if ((cnt != (16+1+16)) || (buf[16] != ':'))
+ return -EINVAL;
+
+ stat = fc_parse_wwn(&buf[0], &wwpn);
+ if (stat)
+ return stat;
+
+ stat = fc_parse_wwn(&buf[17], &wwnn);
+ if (stat)
+ return stat;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+ match = 0;
+ /* we only allow support on Channel 0 !!! */
+ list_for_each_entry(vport, &fc_host->vports, peers) {
+ if ((vport->channel == 0) &&
+ (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
+ if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
+ break;
+ vport->flags |= FC_VPORT_DELETING;
+ match = 1;
+ break;
+ }
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ if (!match)
+ return -ENODEV;
+
+ stat = fc_vport_terminate(vport);
+ return stat ? stat : count;
+}
+static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
+ store_fc_host_vport_delete);
+
+
+static int fc_host_match(struct attribute_container *cont,
+ struct device *dev)
+{
+ struct Scsi_Host *shost;
+ struct fc_internal *i;
+
+ if (!scsi_is_host_device(dev))
+ return 0;
+
+ shost = dev_to_shost(dev);
+ if (!shost->transportt || shost->transportt->host_attrs.ac.class
+ != &fc_host_class.class)
+ return 0;
+
+ i = to_fc_internal(shost->transportt);
+
+ return &i->t.host_attrs.ac == cont;
+}
+
+static int fc_target_match(struct attribute_container *cont,
+ struct device *dev)
+{
+ struct Scsi_Host *shost;
+ struct fc_internal *i;
+
+ if (!scsi_is_target_device(dev))
+ return 0;
+
+ shost = dev_to_shost(dev->parent);
+ if (!shost->transportt || shost->transportt->host_attrs.ac.class
+ != &fc_host_class.class)
+ return 0;
+
+ i = to_fc_internal(shost->transportt);
+
+ return &i->t.target_attrs.ac == cont;
+}
+
+static void fc_rport_dev_release(struct device *dev)
+{
+ struct fc_rport *rport = dev_to_rport(dev);
+ put_device(dev->parent);
+ kfree(rport);
+}
+
+int scsi_is_fc_rport(const struct device *dev)
+{
+ return dev->release == fc_rport_dev_release;
+}
+EXPORT_SYMBOL(scsi_is_fc_rport);
+
+static int fc_rport_match(struct attribute_container *cont,
+ struct device *dev)
+{
+ struct Scsi_Host *shost;
+ struct fc_internal *i;
+
+ if (!scsi_is_fc_rport(dev))
+ return 0;
+
+ shost = dev_to_shost(dev->parent);
+ if (!shost->transportt || shost->transportt->host_attrs.ac.class
+ != &fc_host_class.class)
+ return 0;
+
+ i = to_fc_internal(shost->transportt);
+
+ return &i->rport_attr_cont.ac == cont;
+}
+
+
+static void fc_vport_dev_release(struct device *dev)
+{
+ struct fc_vport *vport = dev_to_vport(dev);
+ put_device(dev->parent); /* release kobj parent */
+ kfree(vport);
+}
+
+static int scsi_is_fc_vport(const struct device *dev)
+{
+ return dev->release == fc_vport_dev_release;
+}
+
+static int fc_vport_match(struct attribute_container *cont,
+ struct device *dev)
+{
+ struct fc_vport *vport;
+ struct Scsi_Host *shost;
+ struct fc_internal *i;
+
+ if (!scsi_is_fc_vport(dev))
+ return 0;
+ vport = dev_to_vport(dev);
+
+ shost = vport_to_shost(vport);
+ if (!shost->transportt || shost->transportt->host_attrs.ac.class
+ != &fc_host_class.class)
+ return 0;
+
+ i = to_fc_internal(shost->transportt);
+ return &i->vport_attr_cont.ac == cont;
+}
+
+
+/**
+ * fc_eh_timed_out - FC Transport I/O timeout intercept handler
+ * @scmd: The SCSI command which timed out
+ *
+ * This routine protects against error handlers getting invoked while a
+ * rport is in a blocked state, typically due to a temporarily loss of
+ * connectivity. If the error handlers are allowed to proceed, requests
+ * to abort i/o, reset the target, etc will likely fail as there is no way
+ * to communicate with the device to perform the requested function. These
+ * failures may result in the midlayer taking the device offline, requiring
+ * manual intervention to restore operation.
+ *
+ * This routine, called whenever an i/o times out, validates the state of
+ * the underlying rport. If the rport is blocked, it returns
+ * EH_RESET_TIMER, which will continue to reschedule the timeout.
+ * Eventually, either the device will return, or devloss_tmo will fire,
+ * and when the timeout then fires, it will be handled normally.
+ * If the rport is not blocked, normal error handling continues.
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ */
+enum blk_eh_timer_return
+fc_eh_timed_out(struct scsi_cmnd *scmd)
+{
+ struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
+
+ if (rport->port_state == FC_PORTSTATE_BLOCKED)
+ return BLK_EH_RESET_TIMER;
+
+ return BLK_EH_DONE;
+}
+EXPORT_SYMBOL(fc_eh_timed_out);
+
+/*
+ * Called by fc_user_scan to locate an rport on the shost that
+ * matches the channel and target id, and invoke scsi_scan_target()
+ * on the rport.
+ */
+static void
+fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
+{
+ struct fc_rport *rport;
+ unsigned long flags;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+
+ list_for_each_entry(rport, &fc_host_rports(shost), peers) {
+ if (rport->scsi_target_id == -1)
+ continue;
+
+ if ((rport->port_state != FC_PORTSTATE_ONLINE) &&
+ (rport->port_state != FC_PORTSTATE_MARGINAL))
+ continue;
+
+ if ((channel == rport->channel) &&
+ (id == rport->scsi_target_id)) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ scsi_scan_target(&rport->dev, channel, id, lun,
+ SCSI_SCAN_MANUAL);
+ return;
+ }
+ }
+
+ spin_unlock_irqrestore(shost->host_lock, flags);
+}
+
+/*
+ * Called via sysfs scan routines. Necessary, as the FC transport
+ * wants to place all target objects below the rport object. So this
+ * routine must invoke the scsi_scan_target() routine with the rport
+ * object as the parent.
+ */
+static int
+fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
+{
+ uint chlo, chhi;
+ uint tgtlo, tgthi;
+
+ if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
+ ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
+ ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
+ return -EINVAL;
+
+ if (channel == SCAN_WILD_CARD) {
+ chlo = 0;
+ chhi = shost->max_channel + 1;
+ } else {
+ chlo = channel;
+ chhi = channel + 1;
+ }
+
+ if (id == SCAN_WILD_CARD) {
+ tgtlo = 0;
+ tgthi = shost->max_id;
+ } else {
+ tgtlo = id;
+ tgthi = id + 1;
+ }
+
+ for ( ; chlo < chhi; chlo++)
+ for ( ; tgtlo < tgthi; tgtlo++)
+ fc_user_scan_tgt(shost, chlo, tgtlo, lun);
+
+ return 0;
+}
+
+struct scsi_transport_template *
+fc_attach_transport(struct fc_function_template *ft)
+{
+ int count;
+ struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
+ GFP_KERNEL);
+
+ if (unlikely(!i))
+ return NULL;
+
+ i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
+ i->t.target_attrs.ac.class = &fc_transport_class.class;
+ i->t.target_attrs.ac.match = fc_target_match;
+ i->t.target_size = sizeof(struct fc_starget_attrs);
+ transport_container_register(&i->t.target_attrs);
+
+ i->t.host_attrs.ac.attrs = &i->host_attrs[0];
+ i->t.host_attrs.ac.class = &fc_host_class.class;
+ i->t.host_attrs.ac.match = fc_host_match;
+ i->t.host_size = sizeof(struct fc_host_attrs);
+ if (ft->get_fc_host_stats)
+ i->t.host_attrs.statistics = &fc_statistics_group;
+ transport_container_register(&i->t.host_attrs);
+
+ i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
+ i->rport_attr_cont.ac.class = &fc_rport_class.class;
+ i->rport_attr_cont.ac.match = fc_rport_match;
+ i->rport_attr_cont.statistics = &fc_rport_statistics_group;
+ transport_container_register(&i->rport_attr_cont);
+
+ i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
+ i->vport_attr_cont.ac.class = &fc_vport_class.class;
+ i->vport_attr_cont.ac.match = fc_vport_match;
+ transport_container_register(&i->vport_attr_cont);
+
+ i->f = ft;
+
+ /* Transport uses the shost workq for scsi scanning */
+ i->t.create_work_queue = 1;
+
+ i->t.user_scan = fc_user_scan;
+
+ /*
+ * Setup SCSI Target Attributes.
+ */
+ count = 0;
+ SETUP_STARGET_ATTRIBUTE_RD(node_name);
+ SETUP_STARGET_ATTRIBUTE_RD(port_name);
+ SETUP_STARGET_ATTRIBUTE_RD(port_id);
+
+ BUG_ON(count > FC_STARGET_NUM_ATTRS);
+
+ i->starget_attrs[count] = NULL;
+
+
+ /*
+ * Setup SCSI Host Attributes.
+ */
+ count=0;
+ SETUP_HOST_ATTRIBUTE_RD(node_name);
+ SETUP_HOST_ATTRIBUTE_RD(port_name);
+ SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
+ SETUP_HOST_ATTRIBUTE_RD(supported_classes);
+ SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
+ SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
+ SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
+ if (ft->vport_create) {
+ SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
+ SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
+ }
+ SETUP_HOST_ATTRIBUTE_RD(serial_number);
+ SETUP_HOST_ATTRIBUTE_RD(manufacturer);
+ SETUP_HOST_ATTRIBUTE_RD(model);
+ SETUP_HOST_ATTRIBUTE_RD(model_description);
+ SETUP_HOST_ATTRIBUTE_RD(hardware_version);
+ SETUP_HOST_ATTRIBUTE_RD(driver_version);
+ SETUP_HOST_ATTRIBUTE_RD(firmware_version);
+ SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
+
+ SETUP_HOST_ATTRIBUTE_RD(port_id);
+ SETUP_HOST_ATTRIBUTE_RD(port_type);
+ SETUP_HOST_ATTRIBUTE_RD(port_state);
+ SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
+ SETUP_HOST_ATTRIBUTE_RD(speed);
+ SETUP_HOST_ATTRIBUTE_RD(fabric_name);
+ SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
+ SETUP_HOST_ATTRIBUTE_RW(system_hostname);
+
+ /* Transport-managed attributes */
+ SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
+ SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
+ if (ft->issue_fc_host_lip)
+ SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
+ if (ft->vport_create)
+ SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
+ if (ft->vport_delete)
+ SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
+
+ BUG_ON(count > FC_HOST_NUM_ATTRS);
+
+ i->host_attrs[count] = NULL;
+
+ /*
+ * Setup Remote Port Attributes.
+ */
+ count=0;
+ SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
+ SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
+ SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
+ SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
+ SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
+ SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
+ SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
+ SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(port_state);
+ SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
+ SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
+
+ BUG_ON(count > FC_RPORT_NUM_ATTRS);
+
+ i->rport_attrs[count] = NULL;
+
+ /*
+ * Setup Virtual Port Attributes.
+ */
+ count=0;
+ SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
+ SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
+ SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
+ SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
+ SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
+ SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
+ SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
+ SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
+ SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
+
+ BUG_ON(count > FC_VPORT_NUM_ATTRS);
+
+ i->vport_attrs[count] = NULL;
+
+ return &i->t;
+}
+EXPORT_SYMBOL(fc_attach_transport);
+
+void fc_release_transport(struct scsi_transport_template *t)
+{
+ struct fc_internal *i = to_fc_internal(t);
+
+ transport_container_unregister(&i->t.target_attrs);
+ transport_container_unregister(&i->t.host_attrs);
+ transport_container_unregister(&i->rport_attr_cont);
+ transport_container_unregister(&i->vport_attr_cont);
+
+ kfree(i);
+}
+EXPORT_SYMBOL(fc_release_transport);
+
+/**
+ * fc_queue_work - Queue work to the fc_host workqueue.
+ * @shost: Pointer to Scsi_Host bound to fc_host.
+ * @work: Work to queue for execution.
+ *
+ * Return value:
+ * 1 - work queued for execution
+ * 0 - work is already queued
+ * -EINVAL - work queue doesn't exist
+ */
+static int
+fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
+{
+ if (unlikely(!fc_host_work_q(shost))) {
+ printk(KERN_ERR
+ "ERROR: FC host '%s' attempted to queue work, "
+ "when no workqueue created.\n", shost->hostt->name);
+ dump_stack();
+
+ return -EINVAL;
+ }
+
+ return queue_work(fc_host_work_q(shost), work);
+}
+
+/**
+ * fc_flush_work - Flush a fc_host's workqueue.
+ * @shost: Pointer to Scsi_Host bound to fc_host.
+ */
+static void
+fc_flush_work(struct Scsi_Host *shost)
+{
+ if (!fc_host_work_q(shost)) {
+ printk(KERN_ERR
+ "ERROR: FC host '%s' attempted to flush work, "
+ "when no workqueue created.\n", shost->hostt->name);
+ dump_stack();
+ return;
+ }
+
+ flush_workqueue(fc_host_work_q(shost));
+}
+
+/**
+ * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
+ * @shost: Pointer to Scsi_Host bound to fc_host.
+ * @work: Work to queue for execution.
+ * @delay: jiffies to delay the work queuing
+ *
+ * Return value:
+ * 1 on success / 0 already queued / < 0 for error
+ */
+static int
+fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
+ unsigned long delay)
+{
+ if (unlikely(!fc_host_devloss_work_q(shost))) {
+ printk(KERN_ERR
+ "ERROR: FC host '%s' attempted to queue work, "
+ "when no workqueue created.\n", shost->hostt->name);
+ dump_stack();
+
+ return -EINVAL;
+ }
+
+ return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
+}
+
+/**
+ * fc_flush_devloss - Flush a fc_host's devloss workqueue.
+ * @shost: Pointer to Scsi_Host bound to fc_host.
+ */
+static void
+fc_flush_devloss(struct Scsi_Host *shost)
+{
+ if (!fc_host_devloss_work_q(shost)) {
+ printk(KERN_ERR
+ "ERROR: FC host '%s' attempted to flush work, "
+ "when no workqueue created.\n", shost->hostt->name);
+ dump_stack();
+ return;
+ }
+
+ flush_workqueue(fc_host_devloss_work_q(shost));
+}
+
+
+/**
+ * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
+ * @shost: Which &Scsi_Host
+ *
+ * This routine is expected to be called immediately preceding the
+ * a driver's call to scsi_remove_host().
+ *
+ * WARNING: A driver utilizing the fc_transport, which fails to call
+ * this routine prior to scsi_remove_host(), will leave dangling
+ * objects in /sys/class/fc_remote_ports. Access to any of these
+ * objects can result in a system crash !!!
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ */
+void
+fc_remove_host(struct Scsi_Host *shost)
+{
+ struct fc_vport *vport = NULL, *next_vport = NULL;
+ struct fc_rport *rport = NULL, *next_rport = NULL;
+ struct workqueue_struct *work_q;
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+ unsigned long flags;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+
+ /* Remove any vports */
+ list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
+ vport->flags |= FC_VPORT_DELETING;
+ fc_queue_work(shost, &vport->vport_delete_work);
+ }
+
+ /* Remove any remote ports */
+ list_for_each_entry_safe(rport, next_rport,
+ &fc_host->rports, peers) {
+ list_del(&rport->peers);
+ rport->port_state = FC_PORTSTATE_DELETED;
+ fc_queue_work(shost, &rport->rport_delete_work);
+ }
+
+ list_for_each_entry_safe(rport, next_rport,
+ &fc_host->rport_bindings, peers) {
+ list_del(&rport->peers);
+ rport->port_state = FC_PORTSTATE_DELETED;
+ fc_queue_work(shost, &rport->rport_delete_work);
+ }
+
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ /* flush all scan work items */
+ scsi_flush_work(shost);
+
+ /* flush all stgt delete, and rport delete work items, then kill it */
+ if (fc_host->work_q) {
+ work_q = fc_host->work_q;
+ fc_host->work_q = NULL;
+ destroy_workqueue(work_q);
+ }
+
+ /* flush all devloss work items, then kill it */
+ if (fc_host->devloss_work_q) {
+ work_q = fc_host->devloss_work_q;
+ fc_host->devloss_work_q = NULL;
+ destroy_workqueue(work_q);
+ }
+}
+EXPORT_SYMBOL(fc_remove_host);
+
+static void fc_terminate_rport_io(struct fc_rport *rport)
+{
+ struct Scsi_Host *shost = rport_to_shost(rport);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+
+ /* Involve the LLDD if possible to terminate all io on the rport. */
+ if (i->f->terminate_rport_io)
+ i->f->terminate_rport_io(rport);
+
+ /*
+ * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
+ */
+ scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
+}
+
+/**
+ * fc_starget_delete - called to delete the scsi descendants of an rport
+ * @work: remote port to be operated on.
+ *
+ * Deletes target and all sdevs.
+ */
+static void
+fc_starget_delete(struct work_struct *work)
+{
+ struct fc_rport *rport =
+ container_of(work, struct fc_rport, stgt_delete_work);
+
+ fc_terminate_rport_io(rport);
+ scsi_remove_target(&rport->dev);
+}
+
+
+/**
+ * fc_rport_final_delete - finish rport termination and delete it.
+ * @work: remote port to be deleted.
+ */
+static void
+fc_rport_final_delete(struct work_struct *work)
+{
+ struct fc_rport *rport =
+ container_of(work, struct fc_rport, rport_delete_work);
+ struct device *dev = &rport->dev;
+ struct Scsi_Host *shost = rport_to_shost(rport);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ unsigned long flags;
+ int do_callback = 0;
+
+ fc_terminate_rport_io(rport);
+
+ /*
+ * if a scan is pending, flush the SCSI Host work_q so that
+ * that we can reclaim the rport scan work element.
+ */
+ if (rport->flags & FC_RPORT_SCAN_PENDING)
+ scsi_flush_work(shost);
+
+ /*
+ * Cancel any outstanding timers. These should really exist
+ * only when rmmod'ing the LLDD and we're asking for
+ * immediate termination of the rports
+ */
+ spin_lock_irqsave(shost->host_lock, flags);
+ if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ if (!cancel_delayed_work(&rport->fail_io_work))
+ fc_flush_devloss(shost);
+ if (!cancel_delayed_work(&rport->dev_loss_work))
+ fc_flush_devloss(shost);
+ cancel_work_sync(&rport->scan_work);
+ spin_lock_irqsave(shost->host_lock, flags);
+ rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ /* Delete SCSI target and sdevs */
+ if (rport->scsi_target_id != -1)
+ fc_starget_delete(&rport->stgt_delete_work);
+
+ /*
+ * Notify the driver that the rport is now dead. The LLDD will
+ * also guarantee that any communication to the rport is terminated
+ *
+ * Avoid this call if we already called it when we preserved the
+ * rport for the binding.
+ */
+ spin_lock_irqsave(shost->host_lock, flags);
+ if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
+ (i->f->dev_loss_tmo_callbk)) {
+ rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
+ do_callback = 1;
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ if (do_callback)
+ i->f->dev_loss_tmo_callbk(rport);
+
+ fc_bsg_remove(rport->rqst_q);
+
+ transport_remove_device(dev);
+ device_del(dev);
+ transport_destroy_device(dev);
+ scsi_host_put(shost); /* for fc_host->rport list */
+ put_device(dev); /* for self-reference */
+}
+
+
+/**
+ * fc_remote_port_create - allocates and creates a remote FC port.
+ * @shost: scsi host the remote port is connected to.
+ * @channel: Channel on shost port connected to.
+ * @ids: The world wide names, fc address, and FC4 port
+ * roles for the remote port.
+ *
+ * Allocates and creates the remoter port structure, including the
+ * class and sysfs creation.
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ */
+static struct fc_rport *
+fc_remote_port_create(struct Scsi_Host *shost, int channel,
+ struct fc_rport_identifiers *ids)
+{
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+ struct fc_internal *fci = to_fc_internal(shost->transportt);
+ struct fc_rport *rport;
+ struct device *dev;
+ unsigned long flags;
+ int error;
+ size_t size;
+
+ size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
+ rport = kzalloc(size, GFP_KERNEL);
+ if (unlikely(!rport)) {
+ printk(KERN_ERR "%s: allocation failure\n", __func__);
+ return NULL;
+ }
+
+ rport->maxframe_size = -1;
+ rport->supported_classes = FC_COS_UNSPECIFIED;
+ rport->dev_loss_tmo = fc_host->dev_loss_tmo;
+ memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
+ memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
+ rport->port_id = ids->port_id;
+ rport->roles = ids->roles;
+ rport->port_state = FC_PORTSTATE_ONLINE;
+ if (fci->f->dd_fcrport_size)
+ rport->dd_data = &rport[1];
+ rport->channel = channel;
+ rport->fast_io_fail_tmo = -1;
+
+ INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
+ INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
+ INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
+ INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
+ INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
+
+ spin_lock_irqsave(shost->host_lock, flags);
+
+ rport->number = fc_host->next_rport_number++;
+ if ((rport->roles & FC_PORT_ROLE_FCP_TARGET) ||
+ (rport->roles & FC_PORT_ROLE_FCP_DUMMY_INITIATOR))
+ rport->scsi_target_id = fc_host->next_target_id++;
+ else
+ rport->scsi_target_id = -1;
+ list_add_tail(&rport->peers, &fc_host->rports);
+ scsi_host_get(shost); /* for fc_host->rport list */
+
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ dev = &rport->dev;
+ device_initialize(dev); /* takes self reference */
+ dev->parent = get_device(&shost->shost_gendev); /* parent reference */
+ dev->release = fc_rport_dev_release;
+ dev_set_name(dev, "rport-%d:%d-%d",
+ shost->host_no, channel, rport->number);
+ transport_setup_device(dev);
+
+ error = device_add(dev);
+ if (error) {
+ printk(KERN_ERR "FC Remote Port device_add failed\n");
+ goto delete_rport;
+ }
+ transport_add_device(dev);
+ transport_configure_device(dev);
+
+ fc_bsg_rportadd(shost, rport);
+ /* ignore any bsg add error - we just can't do sgio */
+
+ if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
+ /* initiate a scan of the target */
+ rport->flags |= FC_RPORT_SCAN_PENDING;
+ scsi_queue_work(shost, &rport->scan_work);
+ }
+
+ return rport;
+
+delete_rport:
+ transport_destroy_device(dev);
+ spin_lock_irqsave(shost->host_lock, flags);
+ list_del(&rport->peers);
+ scsi_host_put(shost); /* for fc_host->rport list */
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ put_device(dev->parent);
+ kfree(rport);
+ return NULL;
+}
+
+/**
+ * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
+ * @shost: scsi host the remote port is connected to.
+ * @channel: Channel on shost port connected to.
+ * @ids: The world wide names, fc address, and FC4 port
+ * roles for the remote port.
+ *
+ * The LLDD calls this routine to notify the transport of the existence
+ * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
+ * of the port, it's FC address (port_id), and the FC4 roles that are
+ * active for the port.
+ *
+ * For ports that are FCP targets (aka scsi targets), the FC transport
+ * maintains consistent target id bindings on behalf of the LLDD.
+ * A consistent target id binding is an assignment of a target id to
+ * a remote port identifier, which persists while the scsi host is
+ * attached. The remote port can disappear, then later reappear, and
+ * it's target id assignment remains the same. This allows for shifts
+ * in FC addressing (if binding by wwpn or wwnn) with no apparent
+ * changes to the scsi subsystem which is based on scsi host number and
+ * target id values. Bindings are only valid during the attachment of
+ * the scsi host. If the host detaches, then later re-attaches, target
+ * id bindings may change.
+ *
+ * This routine is responsible for returning a remote port structure.
+ * The routine will search the list of remote ports it maintains
+ * internally on behalf of consistent target id mappings. If found, the
+ * remote port structure will be reused. Otherwise, a new remote port
+ * structure will be allocated.
+ *
+ * Whenever a remote port is allocated, a new fc_remote_port class
+ * device is created.
+ *
+ * Should not be called from interrupt context.
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ */
+struct fc_rport *
+fc_remote_port_add(struct Scsi_Host *shost, int channel,
+ struct fc_rport_identifiers *ids)
+{
+ struct fc_internal *fci = to_fc_internal(shost->transportt);
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+ struct fc_rport *rport;
+ unsigned long flags;
+ int match = 0;
+
+ /* ensure any stgt delete functions are done */
+ fc_flush_work(shost);
+
+ /*
+ * Search the list of "active" rports, for an rport that has been
+ * deleted, but we've held off the real delete while the target
+ * is in a "blocked" state.
+ */
+ spin_lock_irqsave(shost->host_lock, flags);
+
+ list_for_each_entry(rport, &fc_host->rports, peers) {
+
+ if ((rport->port_state == FC_PORTSTATE_BLOCKED ||
+ rport->port_state == FC_PORTSTATE_NOTPRESENT) &&
+ (rport->channel == channel)) {
+
+ switch (fc_host->tgtid_bind_type) {
+ case FC_TGTID_BIND_BY_WWPN:
+ case FC_TGTID_BIND_NONE:
+ if (rport->port_name == ids->port_name)
+ match = 1;
+ break;
+ case FC_TGTID_BIND_BY_WWNN:
+ if (rport->node_name == ids->node_name)
+ match = 1;
+ break;
+ case FC_TGTID_BIND_BY_ID:
+ if (rport->port_id == ids->port_id)
+ match = 1;
+ break;
+ }
+
+ if (match) {
+
+ memcpy(&rport->node_name, &ids->node_name,
+ sizeof(rport->node_name));
+ memcpy(&rport->port_name, &ids->port_name,
+ sizeof(rport->port_name));
+ rport->port_id = ids->port_id;
+
+ rport->port_state = FC_PORTSTATE_ONLINE;
+ rport->roles = ids->roles;
+
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ if (fci->f->dd_fcrport_size)
+ memset(rport->dd_data, 0,
+ fci->f->dd_fcrport_size);
+
+ /*
+ * If we were not a target, cancel the
+ * io terminate and rport timers, and
+ * we're done.
+ *
+ * If we were a target, but our new role
+ * doesn't indicate a target, leave the
+ * timers running expecting the role to
+ * change as the target fully logs in. If
+ * it doesn't, the target will be torn down.
+ *
+ * If we were a target, and our role shows
+ * we're still a target, cancel the timers
+ * and kick off a scan.
+ */
+
+ /* was a target, not in roles */
+ if ((rport->scsi_target_id != -1) &&
+ (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
+ return rport;
+
+ /*
+ * Stop the fail io and dev_loss timers.
+ * If they flush, the port_state will
+ * be checked and will NOOP the function.
+ */
+ if (!cancel_delayed_work(&rport->fail_io_work))
+ fc_flush_devloss(shost);
+ if (!cancel_delayed_work(&rport->dev_loss_work))
+ fc_flush_devloss(shost);
+
+ spin_lock_irqsave(shost->host_lock, flags);
+
+ rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
+ FC_RPORT_DEVLOSS_PENDING |
+ FC_RPORT_DEVLOSS_CALLBK_DONE);
+
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ /* if target, initiate a scan */
+ if (rport->scsi_target_id != -1) {
+ scsi_target_unblock(&rport->dev,
+ SDEV_RUNNING);
+ spin_lock_irqsave(shost->host_lock,
+ flags);
+ rport->flags |= FC_RPORT_SCAN_PENDING;
+ scsi_queue_work(shost,
+ &rport->scan_work);
+ spin_unlock_irqrestore(shost->host_lock,
+ flags);
+ }
+
+ fc_bsg_goose_queue(rport);
+
+ return rport;
+ }
+ }
+ }
+
+ /*
+ * Search the bindings array
+ * Note: if never a FCP target, you won't be on this list
+ */
+ if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
+
+ /* search for a matching consistent binding */
+
+ list_for_each_entry(rport, &fc_host->rport_bindings,
+ peers) {
+ if (rport->channel != channel)
+ continue;
+
+ switch (fc_host->tgtid_bind_type) {
+ case FC_TGTID_BIND_BY_WWPN:
+ if (rport->port_name == ids->port_name)
+ match = 1;
+ break;
+ case FC_TGTID_BIND_BY_WWNN:
+ if (rport->node_name == ids->node_name)
+ match = 1;
+ break;
+ case FC_TGTID_BIND_BY_ID:
+ if (rport->port_id == ids->port_id)
+ match = 1;
+ break;
+ case FC_TGTID_BIND_NONE: /* to keep compiler happy */
+ break;
+ }
+
+ if (match) {
+ list_move_tail(&rport->peers, &fc_host->rports);
+ break;
+ }
+ }
+
+ if (match) {
+ memcpy(&rport->node_name, &ids->node_name,
+ sizeof(rport->node_name));
+ memcpy(&rport->port_name, &ids->port_name,
+ sizeof(rport->port_name));
+ rport->port_id = ids->port_id;
+ rport->port_state = FC_PORTSTATE_ONLINE;
+ rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
+
+ if (fci->f->dd_fcrport_size)
+ memset(rport->dd_data, 0,
+ fci->f->dd_fcrport_size);
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ fc_remote_port_rolechg(rport, ids->roles);
+ return rport;
+ }
+ }
+
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ /* No consistent binding found - create new remote port entry */
+ rport = fc_remote_port_create(shost, channel, ids);
+
+ return rport;
+}
+EXPORT_SYMBOL(fc_remote_port_add);
+
+
+/**
+ * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
+ * @rport: The remote port that no longer exists
+ *
+ * The LLDD calls this routine to notify the transport that a remote
+ * port is no longer part of the topology. Note: Although a port
+ * may no longer be part of the topology, it may persist in the remote
+ * ports displayed by the fc_host. We do this under 2 conditions:
+ *
+ * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
+ * This allows the port to temporarily disappear, then reappear without
+ * disrupting the SCSI device tree attached to it. During the "blocked"
+ * period the port will still exist.
+ *
+ * 2) If the port was a scsi target and disappears for longer than we
+ * expect, we'll delete the port and the tear down the SCSI device tree
+ * attached to it. However, we want to semi-persist the target id assigned
+ * to that port if it eventually does exist. The port structure will
+ * remain (although with minimal information) so that the target id
+ * bindings also remain.
+ *
+ * If the remote port is not an FCP Target, it will be fully torn down
+ * and deallocated, including the fc_remote_port class device.
+ *
+ * If the remote port is an FCP Target, the port will be placed in a
+ * temporary blocked state. From the LLDD's perspective, the rport no
+ * longer exists. From the SCSI midlayer's perspective, the SCSI target
+ * exists, but all sdevs on it are blocked from further I/O. The following
+ * is then expected.
+ *
+ * If the remote port does not return (signaled by a LLDD call to
+ * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
+ * scsi target is removed - killing all outstanding i/o and removing the
+ * scsi devices attached to it. The port structure will be marked Not
+ * Present and be partially cleared, leaving only enough information to
+ * recognize the remote port relative to the scsi target id binding if
+ * it later appears. The port will remain as long as there is a valid
+ * binding (e.g. until the user changes the binding type or unloads the
+ * scsi host with the binding).
+ *
+ * If the remote port returns within the dev_loss_tmo value (and matches
+ * according to the target id binding type), the port structure will be
+ * reused. If it is no longer a SCSI target, the target will be torn
+ * down. If it continues to be a SCSI target, then the target will be
+ * unblocked (allowing i/o to be resumed), and a scan will be activated
+ * to ensure that all luns are detected.
+ *
+ * Called from normal process context only - cannot be called from interrupt.
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ */
+void
+fc_remote_port_delete(struct fc_rport *rport)
+{
+ struct Scsi_Host *shost = rport_to_shost(rport);
+ unsigned long timeout = rport->dev_loss_tmo;
+ unsigned long flags;
+
+ /*
+ * No need to flush the fc_host work_q's, as all adds are synchronous.
+ *
+ * We do need to reclaim the rport scan work element, so eventually
+ * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
+ * there's still a scan pending.
+ */
+
+ spin_lock_irqsave(shost->host_lock, flags);
+
+ if ((rport->port_state != FC_PORTSTATE_ONLINE) &&
+ (rport->port_state != FC_PORTSTATE_MARGINAL)) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ return;
+ }
+
+ /*
+ * In the past, we if this was not an FCP-Target, we would
+ * unconditionally just jump to deleting the rport.
+ * However, rports can be used as node containers by the LLDD,
+ * and its not appropriate to just terminate the rport at the
+ * first sign of a loss in connectivity. The LLDD may want to
+ * send ELS traffic to re-validate the login. If the rport is
+ * immediately deleted, it makes it inappropriate for a node
+ * container.
+ * So... we now unconditionally wait dev_loss_tmo before
+ * destroying an rport.
+ */
+
+ rport->port_state = FC_PORTSTATE_BLOCKED;
+
+ rport->flags |= FC_RPORT_DEVLOSS_PENDING;
+
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ scsi_target_block(&rport->dev);
+
+ /* see if we need to kill io faster than waiting for device loss */
+ if ((rport->fast_io_fail_tmo != -1) &&
+ (rport->fast_io_fail_tmo < timeout))
+ fc_queue_devloss_work(shost, &rport->fail_io_work,
+ rport->fast_io_fail_tmo * HZ);
+
+ /* cap the length the devices can be blocked until they are deleted */
+ fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
+}
+EXPORT_SYMBOL(fc_remote_port_delete);
+
+/**
+ * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
+ * @rport: The remote port that changed.
+ * @roles: New roles for this port.
+ *
+ * Description: The LLDD calls this routine to notify the transport that the
+ * roles on a remote port may have changed. The largest effect of this is
+ * if a port now becomes a FCP Target, it must be allocated a
+ * scsi target id. If the port is no longer a FCP target, any
+ * scsi target id value assigned to it will persist in case the
+ * role changes back to include FCP Target. No changes in the scsi
+ * midlayer will be invoked if the role changes (in the expectation
+ * that the role will be resumed. If it doesn't normal error processing
+ * will take place).
+ *
+ * Should not be called from interrupt context.
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ */
+void
+fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
+{
+ struct Scsi_Host *shost = rport_to_shost(rport);
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+ unsigned long flags;
+ int create = 0;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+ if (roles & FC_PORT_ROLE_FCP_TARGET) {
+ if (rport->scsi_target_id == -1) {
+ rport->scsi_target_id = fc_host->next_target_id++;
+ create = 1;
+ } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
+ create = 1;
+ }
+
+ rport->roles = roles;
+
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ if (create) {
+ /*
+ * There may have been a delete timer running on the
+ * port. Ensure that it is cancelled as we now know
+ * the port is an FCP Target.
+ * Note: we know the rport exists and is in an online
+ * state as the LLDD would not have had an rport
+ * reference to pass us.
+ *
+ * Take no action on the del_timer failure as the state
+ * machine state change will validate the
+ * transaction.
+ */
+ if (!cancel_delayed_work(&rport->fail_io_work))
+ fc_flush_devloss(shost);
+ if (!cancel_delayed_work(&rport->dev_loss_work))
+ fc_flush_devloss(shost);
+
+ spin_lock_irqsave(shost->host_lock, flags);
+ rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
+ FC_RPORT_DEVLOSS_PENDING |
+ FC_RPORT_DEVLOSS_CALLBK_DONE);
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ /* ensure any stgt delete functions are done */
+ fc_flush_work(shost);
+
+ scsi_target_unblock(&rport->dev, SDEV_RUNNING);
+ /* initiate a scan of the target */
+ spin_lock_irqsave(shost->host_lock, flags);
+ rport->flags |= FC_RPORT_SCAN_PENDING;
+ scsi_queue_work(shost, &rport->scan_work);
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ }
+}
+EXPORT_SYMBOL(fc_remote_port_rolechg);
+
+/**
+ * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
+ * @work: rport target that failed to reappear in the allotted time.
+ *
+ * Description: An attempt to delete a remote port blocks, and if it fails
+ * to return in the allotted time this gets called.
+ */
+static void
+fc_timeout_deleted_rport(struct work_struct *work)
+{
+ struct fc_rport *rport =
+ container_of(work, struct fc_rport, dev_loss_work.work);
+ struct Scsi_Host *shost = rport_to_shost(rport);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+ unsigned long flags;
+ int do_callback = 0;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+
+ rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
+
+ /*
+ * If the port is ONLINE, then it came back. If it was a SCSI
+ * target, validate it still is. If not, tear down the
+ * scsi_target on it.
+ */
+ if (((rport->port_state == FC_PORTSTATE_ONLINE) ||
+ (rport->port_state == FC_PORTSTATE_MARGINAL)) &&
+ (rport->scsi_target_id != -1) &&
+ !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
+ dev_printk(KERN_ERR, &rport->dev,
+ "blocked FC remote port time out: no longer"
+ " a FCP target, removing starget\n");
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
+ fc_queue_work(shost, &rport->stgt_delete_work);
+ return;
+ }
+
+ /* NOOP state - we're flushing workq's */
+ if (rport->port_state != FC_PORTSTATE_BLOCKED) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ dev_printk(KERN_ERR, &rport->dev,
+ "blocked FC remote port time out: leaving"
+ " rport%s alone\n",
+ (rport->scsi_target_id != -1) ? " and starget" : "");
+ return;
+ }
+
+ if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
+ (rport->scsi_target_id == -1)) {
+ list_del(&rport->peers);
+ rport->port_state = FC_PORTSTATE_DELETED;
+ dev_printk(KERN_ERR, &rport->dev,
+ "blocked FC remote port time out: removing"
+ " rport%s\n",
+ (rport->scsi_target_id != -1) ? " and starget" : "");
+ fc_queue_work(shost, &rport->rport_delete_work);
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ return;
+ }
+
+ dev_printk(KERN_ERR, &rport->dev,
+ "blocked FC remote port time out: removing target and "
+ "saving binding\n");
+
+ list_move_tail(&rport->peers, &fc_host->rport_bindings);
+
+ /*
+ * Note: We do not remove or clear the hostdata area. This allows
+ * host-specific target data to persist along with the
+ * scsi_target_id. It's up to the host to manage it's hostdata area.
+ */
+
+ /*
+ * Reinitialize port attributes that may change if the port comes back.
+ */
+ rport->maxframe_size = -1;
+ rport->supported_classes = FC_COS_UNSPECIFIED;
+ rport->roles = FC_PORT_ROLE_UNKNOWN;
+ rport->port_state = FC_PORTSTATE_NOTPRESENT;
+ rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
+
+ /*
+ * Pre-emptively kill I/O rather than waiting for the work queue
+ * item to teardown the starget. (FCOE libFC folks prefer this
+ * and to have the rport_port_id still set when it's done).
+ */
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ fc_terminate_rport_io(rport);
+
+ spin_lock_irqsave(shost->host_lock, flags);
+
+ if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */
+
+ /* remove the identifiers that aren't used in the consisting binding */
+ switch (fc_host->tgtid_bind_type) {
+ case FC_TGTID_BIND_BY_WWPN:
+ rport->node_name = -1;
+ rport->port_id = -1;
+ break;
+ case FC_TGTID_BIND_BY_WWNN:
+ rport->port_name = -1;
+ rport->port_id = -1;
+ break;
+ case FC_TGTID_BIND_BY_ID:
+ rport->node_name = -1;
+ rport->port_name = -1;
+ break;
+ case FC_TGTID_BIND_NONE: /* to keep compiler happy */
+ break;
+ }
+
+ /*
+ * As this only occurs if the remote port (scsi target)
+ * went away and didn't come back - we'll remove
+ * all attached scsi devices.
+ */
+ rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
+ fc_queue_work(shost, &rport->stgt_delete_work);
+
+ do_callback = 1;
+ }
+
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ /*
+ * Notify the driver that the rport is now dead. The LLDD will
+ * also guarantee that any communication to the rport is terminated
+ *
+ * Note: we set the CALLBK_DONE flag above to correspond
+ */
+ if (do_callback && i->f->dev_loss_tmo_callbk)
+ i->f->dev_loss_tmo_callbk(rport);
+}
+
+
+/**
+ * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
+ * @work: rport to terminate io on.
+ *
+ * Notes: Only requests the failure of the io, not that all are flushed
+ * prior to returning.
+ */
+static void
+fc_timeout_fail_rport_io(struct work_struct *work)
+{
+ struct fc_rport *rport =
+ container_of(work, struct fc_rport, fail_io_work.work);
+
+ if (rport->port_state != FC_PORTSTATE_BLOCKED)
+ return;
+
+ rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
+ fc_terminate_rport_io(rport);
+}
+
+/**
+ * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
+ * @work: remote port to be scanned.
+ */
+static void
+fc_scsi_scan_rport(struct work_struct *work)
+{
+ struct fc_rport *rport =
+ container_of(work, struct fc_rport, scan_work);
+ struct Scsi_Host *shost = rport_to_shost(rport);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ unsigned long flags;
+
+ if (((rport->port_state == FC_PORTSTATE_ONLINE) ||
+ (rport->port_state == FC_PORTSTATE_MARGINAL)) &&
+ (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
+ !(i->f->disable_target_scan)) {
+ scsi_scan_target(&rport->dev, rport->channel,
+ rport->scsi_target_id, SCAN_WILD_CARD,
+ SCSI_SCAN_RESCAN);
+ }
+
+ spin_lock_irqsave(shost->host_lock, flags);
+ rport->flags &= ~FC_RPORT_SCAN_PENDING;
+ spin_unlock_irqrestore(shost->host_lock, flags);
+}
+
+/**
+ * fc_block_rport() - Block SCSI eh thread for blocked fc_rport.
+ * @rport: Remote port that scsi_eh is trying to recover.
+ *
+ * This routine can be called from a FC LLD scsi_eh callback. It
+ * blocks the scsi_eh thread until the fc_rport leaves the
+ * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
+ * necessary to avoid the scsi_eh failing recovery actions for blocked
+ * rports which would lead to offlined SCSI devices.
+ *
+ * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
+ * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
+ * passed back to scsi_eh.
+ */
+int fc_block_rport(struct fc_rport *rport)
+{
+ struct Scsi_Host *shost = rport_to_shost(rport);
+ unsigned long flags;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+ while (rport->port_state == FC_PORTSTATE_BLOCKED &&
+ !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ msleep(1000);
+ spin_lock_irqsave(shost->host_lock, flags);
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
+ return FAST_IO_FAIL;
+
+ return 0;
+}
+EXPORT_SYMBOL(fc_block_rport);
+
+/**
+ * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
+ * @cmnd: SCSI command that scsi_eh is trying to recover
+ *
+ * This routine can be called from a FC LLD scsi_eh callback. It
+ * blocks the scsi_eh thread until the fc_rport leaves the
+ * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
+ * necessary to avoid the scsi_eh failing recovery actions for blocked
+ * rports which would lead to offlined SCSI devices.
+ *
+ * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
+ * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
+ * passed back to scsi_eh.
+ */
+int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
+{
+ struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
+
+ if (WARN_ON_ONCE(!rport))
+ return FAST_IO_FAIL;
+
+ return fc_block_rport(rport);
+}
+EXPORT_SYMBOL(fc_block_scsi_eh);
+
+/*
+ * fc_eh_should_retry_cmd - Checks if the cmd should be retried or not
+ * @scmd: The SCSI command to be checked
+ *
+ * This checks the rport state to decide if a cmd is
+ * retryable.
+ *
+ * Returns: true if the rport state is not in marginal state.
+ */
+bool fc_eh_should_retry_cmd(struct scsi_cmnd *scmd)
+{
+ struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
+
+ if ((rport->port_state != FC_PORTSTATE_ONLINE) &&
+ (scsi_cmd_to_rq(scmd)->cmd_flags & REQ_FAILFAST_TRANSPORT)) {
+ set_host_byte(scmd, DID_TRANSPORT_MARGINAL);
+ return false;
+ }
+ return true;
+}
+EXPORT_SYMBOL_GPL(fc_eh_should_retry_cmd);
+
+/**
+ * fc_vport_setup - allocates and creates a FC virtual port.
+ * @shost: scsi host the virtual port is connected to.
+ * @channel: Channel on shost port connected to.
+ * @pdev: parent device for vport
+ * @ids: The world wide names, FC4 port roles, etc for
+ * the virtual port.
+ * @ret_vport: The pointer to the created vport.
+ *
+ * Allocates and creates the vport structure, calls the parent host
+ * to instantiate the vport, this completes w/ class and sysfs creation.
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ */
+static int
+fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
+ struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
+{
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+ struct fc_internal *fci = to_fc_internal(shost->transportt);
+ struct fc_vport *vport;
+ struct device *dev;
+ unsigned long flags;
+ size_t size;
+ int error;
+
+ *ret_vport = NULL;
+
+ if ( ! fci->f->vport_create)
+ return -ENOENT;
+
+ size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
+ vport = kzalloc(size, GFP_KERNEL);
+ if (unlikely(!vport)) {
+ printk(KERN_ERR "%s: allocation failure\n", __func__);
+ return -ENOMEM;
+ }
+
+ vport->vport_state = FC_VPORT_UNKNOWN;
+ vport->vport_last_state = FC_VPORT_UNKNOWN;
+ vport->node_name = ids->node_name;
+ vport->port_name = ids->port_name;
+ vport->roles = ids->roles;
+ vport->vport_type = ids->vport_type;
+ if (fci->f->dd_fcvport_size)
+ vport->dd_data = &vport[1];
+ vport->shost = shost;
+ vport->channel = channel;
+ vport->flags = FC_VPORT_CREATING;
+ INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
+
+ spin_lock_irqsave(shost->host_lock, flags);
+
+ if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ kfree(vport);
+ return -ENOSPC;
+ }
+ fc_host->npiv_vports_inuse++;
+ vport->number = fc_host->next_vport_number++;
+ list_add_tail(&vport->peers, &fc_host->vports);
+ scsi_host_get(shost); /* for fc_host->vport list */
+
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ dev = &vport->dev;
+ device_initialize(dev); /* takes self reference */
+ dev->parent = get_device(pdev); /* takes parent reference */
+ dev->release = fc_vport_dev_release;
+ dev_set_name(dev, "vport-%d:%d-%d",
+ shost->host_no, channel, vport->number);
+ transport_setup_device(dev);
+
+ error = device_add(dev);
+ if (error) {
+ printk(KERN_ERR "FC Virtual Port device_add failed\n");
+ goto delete_vport;
+ }
+ transport_add_device(dev);
+ transport_configure_device(dev);
+
+ error = fci->f->vport_create(vport, ids->disable);
+ if (error) {
+ printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
+ goto delete_vport_all;
+ }
+
+ /*
+ * if the parent isn't the physical adapter's Scsi_Host, ensure
+ * the Scsi_Host at least contains a symlink to the vport.
+ */
+ if (pdev != &shost->shost_gendev) {
+ error = sysfs_create_link(&shost->shost_gendev.kobj,
+ &dev->kobj, dev_name(dev));
+ if (error)
+ printk(KERN_ERR
+ "%s: Cannot create vport symlinks for "
+ "%s, err=%d\n",
+ __func__, dev_name(dev), error);
+ }
+ spin_lock_irqsave(shost->host_lock, flags);
+ vport->flags &= ~FC_VPORT_CREATING;
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ dev_printk(KERN_NOTICE, pdev,
+ "%s created via shost%d channel %d\n", dev_name(dev),
+ shost->host_no, channel);
+
+ *ret_vport = vport;
+
+ return 0;
+
+delete_vport_all:
+ transport_remove_device(dev);
+ device_del(dev);
+delete_vport:
+ transport_destroy_device(dev);
+ spin_lock_irqsave(shost->host_lock, flags);
+ list_del(&vport->peers);
+ scsi_host_put(shost); /* for fc_host->vport list */
+ fc_host->npiv_vports_inuse--;
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ put_device(dev->parent);
+ kfree(vport);
+
+ return error;
+}
+
+/**
+ * fc_vport_create - Admin App or LLDD requests creation of a vport
+ * @shost: scsi host the virtual port is connected to.
+ * @channel: channel on shost port connected to.
+ * @ids: The world wide names, FC4 port roles, etc for
+ * the virtual port.
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ */
+struct fc_vport *
+fc_vport_create(struct Scsi_Host *shost, int channel,
+ struct fc_vport_identifiers *ids)
+{
+ int stat;
+ struct fc_vport *vport;
+
+ stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
+ ids, &vport);
+ return stat ? NULL : vport;
+}
+EXPORT_SYMBOL(fc_vport_create);
+
+/**
+ * fc_vport_terminate - Admin App or LLDD requests termination of a vport
+ * @vport: fc_vport to be terminated
+ *
+ * Calls the LLDD vport_delete() function, then deallocates and removes
+ * the vport from the shost and object tree.
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ */
+int
+fc_vport_terminate(struct fc_vport *vport)
+{
+ struct Scsi_Host *shost = vport_to_shost(vport);
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ struct device *dev = &vport->dev;
+ unsigned long flags;
+ int stat;
+
+ if (i->f->vport_delete)
+ stat = i->f->vport_delete(vport);
+ else
+ stat = -ENOENT;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+ vport->flags &= ~FC_VPORT_DELETING;
+ if (!stat) {
+ vport->flags |= FC_VPORT_DELETED;
+ list_del(&vport->peers);
+ fc_host->npiv_vports_inuse--;
+ scsi_host_put(shost); /* for fc_host->vport list */
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ if (stat)
+ return stat;
+
+ if (dev->parent != &shost->shost_gendev)
+ sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
+ transport_remove_device(dev);
+ device_del(dev);
+ transport_destroy_device(dev);
+
+ /*
+ * Removing our self-reference should mean our
+ * release function gets called, which will drop the remaining
+ * parent reference and free the data structure.
+ */
+ put_device(dev); /* for self-reference */
+
+ return 0; /* SUCCESS */
+}
+EXPORT_SYMBOL(fc_vport_terminate);
+
+/**
+ * fc_vport_sched_delete - workq-based delete request for a vport
+ * @work: vport to be deleted.
+ */
+static void
+fc_vport_sched_delete(struct work_struct *work)
+{
+ struct fc_vport *vport =
+ container_of(work, struct fc_vport, vport_delete_work);
+ int stat;
+
+ stat = fc_vport_terminate(vport);
+ if (stat)
+ dev_printk(KERN_ERR, vport->dev.parent,
+ "%s: %s could not be deleted created via "
+ "shost%d channel %d - error %d\n", __func__,
+ dev_name(&vport->dev), vport->shost->host_no,
+ vport->channel, stat);
+}
+
+
+/*
+ * BSG support
+ */
+
+/**
+ * fc_bsg_job_timeout - handler for when a bsg request timesout
+ * @req: request that timed out
+ */
+static enum blk_eh_timer_return
+fc_bsg_job_timeout(struct request *req)
+{
+ struct bsg_job *job = blk_mq_rq_to_pdu(req);
+ struct Scsi_Host *shost = fc_bsg_to_shost(job);
+ struct fc_rport *rport = fc_bsg_to_rport(job);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ int err = 0, inflight = 0;
+
+ if (rport && rport->port_state == FC_PORTSTATE_BLOCKED)
+ return BLK_EH_RESET_TIMER;
+
+ inflight = bsg_job_get(job);
+
+ if (inflight && i->f->bsg_timeout) {
+ /* call LLDD to abort the i/o as it has timed out */
+ err = i->f->bsg_timeout(job);
+ if (err == -EAGAIN) {
+ bsg_job_put(job);
+ return BLK_EH_RESET_TIMER;
+ } else if (err)
+ printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
+ "abort failed with status %d\n", err);
+ }
+
+ /* the blk_end_sync_io() doesn't check the error */
+ if (inflight)
+ blk_mq_end_request(req, BLK_STS_IOERR);
+ return BLK_EH_DONE;
+}
+
+/**
+ * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
+ * @shost: scsi host rport attached to
+ * @job: bsg job to be processed
+ */
+static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
+{
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ struct fc_bsg_request *bsg_request = job->request;
+ struct fc_bsg_reply *bsg_reply = job->reply;
+ int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
+ int ret;
+
+ /* check if we really have all the request data needed */
+ if (job->request_len < cmdlen) {
+ ret = -ENOMSG;
+ goto fail_host_msg;
+ }
+
+ /* Validate the host command */
+ switch (bsg_request->msgcode) {
+ case FC_BSG_HST_ADD_RPORT:
+ cmdlen += sizeof(struct fc_bsg_host_add_rport);
+ break;
+
+ case FC_BSG_HST_DEL_RPORT:
+ cmdlen += sizeof(struct fc_bsg_host_del_rport);
+ break;
+
+ case FC_BSG_HST_ELS_NOLOGIN:
+ cmdlen += sizeof(struct fc_bsg_host_els);
+ /* there better be a xmt and rcv payloads */
+ if ((!job->request_payload.payload_len) ||
+ (!job->reply_payload.payload_len)) {
+ ret = -EINVAL;
+ goto fail_host_msg;
+ }
+ break;
+
+ case FC_BSG_HST_CT:
+ cmdlen += sizeof(struct fc_bsg_host_ct);
+ /* there better be xmt and rcv payloads */
+ if ((!job->request_payload.payload_len) ||
+ (!job->reply_payload.payload_len)) {
+ ret = -EINVAL;
+ goto fail_host_msg;
+ }
+ break;
+
+ case FC_BSG_HST_VENDOR:
+ cmdlen += sizeof(struct fc_bsg_host_vendor);
+ if ((shost->hostt->vendor_id == 0L) ||
+ (bsg_request->rqst_data.h_vendor.vendor_id !=
+ shost->hostt->vendor_id)) {
+ ret = -ESRCH;
+ goto fail_host_msg;
+ }
+ break;
+
+ default:
+ ret = -EBADR;
+ goto fail_host_msg;
+ }
+
+ ret = i->f->bsg_request(job);
+ if (!ret)
+ return 0;
+
+fail_host_msg:
+ /* return the errno failure code as the only status */
+ BUG_ON(job->reply_len < sizeof(uint32_t));
+ bsg_reply->reply_payload_rcv_len = 0;
+ bsg_reply->result = ret;
+ job->reply_len = sizeof(uint32_t);
+ bsg_job_done(job, bsg_reply->result,
+ bsg_reply->reply_payload_rcv_len);
+ return 0;
+}
+
+
+/*
+ * fc_bsg_goose_queue - restart rport queue in case it was stopped
+ * @rport: rport to be restarted
+ */
+static void
+fc_bsg_goose_queue(struct fc_rport *rport)
+{
+ struct request_queue *q = rport->rqst_q;
+
+ if (q)
+ blk_mq_run_hw_queues(q, true);
+}
+
+/**
+ * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
+ * @shost: scsi host rport attached to
+ * @job: bsg job to be processed
+ */
+static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
+{
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ struct fc_bsg_request *bsg_request = job->request;
+ struct fc_bsg_reply *bsg_reply = job->reply;
+ int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
+ int ret;
+
+ /* check if we really have all the request data needed */
+ if (job->request_len < cmdlen) {
+ ret = -ENOMSG;
+ goto fail_rport_msg;
+ }
+
+ /* Validate the rport command */
+ switch (bsg_request->msgcode) {
+ case FC_BSG_RPT_ELS:
+ cmdlen += sizeof(struct fc_bsg_rport_els);
+ goto check_bidi;
+
+ case FC_BSG_RPT_CT:
+ cmdlen += sizeof(struct fc_bsg_rport_ct);
+check_bidi:
+ /* there better be xmt and rcv payloads */
+ if ((!job->request_payload.payload_len) ||
+ (!job->reply_payload.payload_len)) {
+ ret = -EINVAL;
+ goto fail_rport_msg;
+ }
+ break;
+ default:
+ ret = -EBADR;
+ goto fail_rport_msg;
+ }
+
+ ret = i->f->bsg_request(job);
+ if (!ret)
+ return 0;
+
+fail_rport_msg:
+ /* return the errno failure code as the only status */
+ BUG_ON(job->reply_len < sizeof(uint32_t));
+ bsg_reply->reply_payload_rcv_len = 0;
+ bsg_reply->result = ret;
+ job->reply_len = sizeof(uint32_t);
+ bsg_job_done(job, bsg_reply->result,
+ bsg_reply->reply_payload_rcv_len);
+ return 0;
+}
+
+static int fc_bsg_dispatch(struct bsg_job *job)
+{
+ struct Scsi_Host *shost = fc_bsg_to_shost(job);
+
+ if (scsi_is_fc_rport(job->dev))
+ return fc_bsg_rport_dispatch(shost, job);
+ else
+ return fc_bsg_host_dispatch(shost, job);
+}
+
+static blk_status_t fc_bsg_rport_prep(struct fc_rport *rport)
+{
+ if (rport->port_state == FC_PORTSTATE_BLOCKED &&
+ !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
+ return BLK_STS_RESOURCE;
+
+ if ((rport->port_state != FC_PORTSTATE_ONLINE) &&
+ (rport->port_state != FC_PORTSTATE_MARGINAL))
+ return BLK_STS_IOERR;
+
+ return BLK_STS_OK;
+}
+
+
+static int fc_bsg_dispatch_prep(struct bsg_job *job)
+{
+ struct fc_rport *rport = fc_bsg_to_rport(job);
+ blk_status_t ret;
+
+ ret = fc_bsg_rport_prep(rport);
+ switch (ret) {
+ case BLK_STS_OK:
+ break;
+ case BLK_STS_RESOURCE:
+ return -EAGAIN;
+ default:
+ return -EIO;
+ }
+
+ return fc_bsg_dispatch(job);
+}
+
+/**
+ * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
+ * @shost: shost for fc_host
+ * @fc_host: fc_host adding the structures to
+ */
+static int
+fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
+{
+ struct device *dev = &shost->shost_gendev;
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ struct request_queue *q;
+ char bsg_name[20];
+
+ fc_host->rqst_q = NULL;
+
+ if (!i->f->bsg_request)
+ return -ENOTSUPP;
+
+ snprintf(bsg_name, sizeof(bsg_name),
+ "fc_host%d", shost->host_no);
+
+ q = bsg_setup_queue(dev, bsg_name, fc_bsg_dispatch, fc_bsg_job_timeout,
+ i->f->dd_bsg_size);
+ if (IS_ERR(q)) {
+ dev_err(dev,
+ "fc_host%d: bsg interface failed to initialize - setup queue\n",
+ shost->host_no);
+ return PTR_ERR(q);
+ }
+ __scsi_init_queue(shost, q);
+ blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
+ fc_host->rqst_q = q;
+ return 0;
+}
+
+/**
+ * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
+ * @shost: shost that rport is attached to
+ * @rport: rport that the bsg hooks are being attached to
+ */
+static int
+fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
+{
+ struct device *dev = &rport->dev;
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ struct request_queue *q;
+
+ rport->rqst_q = NULL;
+
+ if (!i->f->bsg_request)
+ return -ENOTSUPP;
+
+ q = bsg_setup_queue(dev, dev_name(dev), fc_bsg_dispatch_prep,
+ fc_bsg_job_timeout, i->f->dd_bsg_size);
+ if (IS_ERR(q)) {
+ dev_err(dev, "failed to setup bsg queue\n");
+ return PTR_ERR(q);
+ }
+ __scsi_init_queue(shost, q);
+ blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
+ rport->rqst_q = q;
+ return 0;
+}
+
+
+/**
+ * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
+ * @q: the request_queue that is to be torn down.
+ *
+ * Notes:
+ * Before unregistering the queue empty any requests that are blocked
+ *
+ *
+ */
+static void
+fc_bsg_remove(struct request_queue *q)
+{
+ bsg_remove_queue(q);
+}
+
+
+/* Original Author: Martin Hicks */
+MODULE_AUTHOR("James Smart");
+MODULE_DESCRIPTION("FC Transport Attributes");
+MODULE_LICENSE("GPL");
+
+module_init(fc_transport_init);
+module_exit(fc_transport_exit);