* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * ========
+ *
+ * Copyright (C) 2004-2005 James Smart, Emulex Corporation
+ * Rewrite for host, target, device, and remote port attributes,
+ * statistics, and service functions...
+ *
*/
#include <linux/module.h>
#include <linux/init.h>
+#include <linux/sched.h> /* workqueue stuff, HZ */
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_fc.h>
+#include <scsi/scsi_cmnd.h>
+#include <linux/netlink.h>
+#include <net/netlink.h>
+#include <scsi/scsi_netlink_fc.h>
+#include "scsi_priv.h"
+
+static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
+
+/*
+ * Redefine so that we can have same named attributes in the
+ * sdev/starget/host objects.
+ */
+#define FC_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
+struct class_device_attribute class_device_attr_##_prefix##_##_name = \
+ __ATTR(_name,_mode,_show,_store)
+
+#define fc_enum_name_search(title, table_type, table) \
+static const char *get_fc_##title##_name(enum table_type table_key) \
+{ \
+ int i; \
+ char *name = NULL; \
+ \
+ for (i = 0; i < ARRAY_SIZE(table); i++) { \
+ if (table[i].value == table_key) { \
+ name = table[i].name; \
+ break; \
+ } \
+ } \
+ return name; \
+}
+
+#define fc_enum_name_match(title, table_type, table) \
+static int get_fc_##title##_match(const char *table_key, \
+ enum table_type *value) \
+{ \
+ int i; \
+ \
+ for (i = 0; i < ARRAY_SIZE(table); i++) { \
+ if (strncmp(table_key, table[i].name, \
+ table[i].matchlen) == 0) { \
+ *value = table[i].value; \
+ return 0; /* success */ \
+ } \
+ } \
+ return 1; /* failure */ \
+}
+
+
+/* Convert fc_port_type values to ascii string name */
+static struct {
+ enum fc_port_type value;
+ char *name;
+} fc_port_type_names[] = {
+ { FC_PORTTYPE_UNKNOWN, "Unknown" },
+ { FC_PORTTYPE_OTHER, "Other" },
+ { FC_PORTTYPE_NOTPRESENT, "Not Present" },
+ { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" },
+ { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
+ { FC_PORTTYPE_LPORT, "LPort (private loop)" },
+ { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection" },
+};
+fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
+#define FC_PORTTYPE_MAX_NAMELEN 50
+
+
+/* Convert fc_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_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;
+} fc_port_state_names[] = {
+ { FC_PORTSTATE_UNKNOWN, "Unknown" },
+ { FC_PORTSTATE_NOTPRESENT, "Not Present" },
+ { FC_PORTSTATE_ONLINE, "Online" },
+ { FC_PORTSTATE_OFFLINE, "Offline" },
+ { FC_PORTSTATE_BLOCKED, "Blocked" },
+ { FC_PORTSTATE_BYPASSED, "Bypassed" },
+ { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" },
+ { FC_PORTSTATE_LINKDOWN, "Linkdown" },
+ { FC_PORTSTATE_ERROR, "Error" },
+ { FC_PORTSTATE_LOOPBACK, "Loopback" },
+ { FC_PORTSTATE_DELETED, "Deleted" },
+};
+fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
+#define FC_PORTSTATE_MAX_NAMELEN 20
+
+
+/* Convert fc_tgtid_binding_type values to ascii string name */
+static const struct {
+ enum fc_tgtid_binding_type value;
+ char *name;
+ int matchlen;
+} fc_tgtid_binding_type_names[] = {
+ { FC_TGTID_BIND_NONE, "none", 4 },
+ { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
+ { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
+ { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
+};
+fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
+ fc_tgtid_binding_type_names)
+fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
+ fc_tgtid_binding_type_names)
+#define FC_BINDTYPE_MAX_NAMELEN 30
+
+
+#define fc_bitfield_name_search(title, table) \
+static ssize_t \
+get_fc_##title##_names(u32 table_key, char *buf) \
+{ \
+ char *prefix = ""; \
+ ssize_t len = 0; \
+ int i; \
+ \
+ for (i = 0; i < ARRAY_SIZE(table); i++) { \
+ if (table[i].value & table_key) { \
+ len += sprintf(buf + len, "%s%s", \
+ prefix, table[i].name); \
+ prefix = ", "; \
+ } \
+ } \
+ len += sprintf(buf + len, "\n"); \
+ return len; \
+}
+
+
+/* Convert FC_COS bit values to ascii string name */
+static const struct {
+ u32 value;
+ char *name;
+} fc_cos_names[] = {
+ { FC_COS_CLASS1, "Class 1" },
+ { FC_COS_CLASS2, "Class 2" },
+ { FC_COS_CLASS3, "Class 3" },
+ { FC_COS_CLASS4, "Class 4" },
+ { FC_COS_CLASS6, "Class 6" },
+};
+fc_bitfield_name_search(cos, fc_cos_names)
+
+
+/* Convert FC_PORTSPEED bit values to ascii string name */
+static const struct {
+ u32 value;
+ char *name;
+} fc_port_speed_names[] = {
+ { FC_PORTSPEED_1GBIT, "1 Gbit" },
+ { FC_PORTSPEED_2GBIT, "2 Gbit" },
+ { FC_PORTSPEED_4GBIT, "4 Gbit" },
+ { FC_PORTSPEED_10GBIT, "10 Gbit" },
+ { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" },
+};
+fc_bitfield_name_search(port_speed, fc_port_speed_names)
+
+
+static int
+show_fc_fc4s (char *buf, u8 *fc4_list)
+{
+ int i, len=0;
+
+ for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
+ len += sprintf(buf + len , "0x%02x ", *fc4_list);
+ len += sprintf(buf + len, "\n");
+ return len;
+}
+
+
+/* Convert FC_RPORT_ROLE bit values to ascii string name */
+static const struct {
+ u32 value;
+ char *name;
+} fc_remote_port_role_names[] = {
+ { FC_RPORT_ROLE_FCP_TARGET, "FCP Target" },
+ { FC_RPORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
+ { FC_RPORT_ROLE_IP_PORT, "IP Port" },
+};
+fc_bitfield_name_search(remote_port_roles, fc_remote_port_role_names)
+
+/*
+ * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
+ */
+#define FC_WELLKNOWN_PORTID_MASK 0xfffff0
+#define FC_WELLKNOWN_ROLE_MASK 0x00000f
+#define FC_FPORT_PORTID 0x00000e
+#define FC_FABCTLR_PORTID 0x00000d
+#define FC_DIRSRVR_PORTID 0x00000c
+#define FC_TIMESRVR_PORTID 0x00000b
+#define FC_MGMTSRVR_PORTID 0x00000a
-#define FC_PRINTK(x, l, f, a...) printk(l "scsi(%d:%d:%d:%d): " f, (x)->host->host_no, (x)->channel, (x)->id, (x)->lun , ##a)
-static void transport_class_release(struct class_device *class_dev);
+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);
-#define FC_NUM_ATTRS 3 /* increase this if you add attributes */
-#define FC_OTHER_ATTRS 0 /* increase this if you add "always on"
- * attributes */
+/*
+ * 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_HOST_NUM_ATTRS 17
struct fc_internal {
struct scsi_transport_template t;
struct fc_function_template *f;
- /* The actual attributes */
- struct class_device_attribute private_attrs[FC_NUM_ATTRS];
- /* The array of null terminated pointers to attributes
- * needed by scsi_sysfs.c */
- struct class_device_attribute *attrs[FC_NUM_ATTRS + FC_OTHER_ATTRS + 1];
+
+ /*
+ * For attributes : each object has :
+ * An array of the actual attributes structures
+ * An array of null-terminated pointers to the attribute
+ * structures - used for mid-layer interaction.
+ *
+ * The attribute containers for the starget and host are are
+ * part of the midlayer. As the remote port is specific to the
+ * fc transport, we must provide the attribute container.
+ */
+ struct class_device_attribute private_starget_attrs[
+ FC_STARGET_NUM_ATTRS];
+ struct class_device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
+
+ struct class_device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
+ struct class_device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
+
+ struct transport_container rport_attr_cont;
+ struct class_device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
+ struct class_device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
};
#define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
-struct class fc_transport_class = {
- .name = "fc_transport",
- .release = transport_class_release,
-};
+static int fc_target_setup(struct transport_container *tc, struct device *dev,
+ struct class_device *cdev)
+{
+ struct scsi_target *starget = to_scsi_target(dev);
+ struct fc_rport *rport = starget_to_rport(starget);
+
+ /*
+ * if parent is remote port, use values from remote port.
+ * Otherwise, this host uses the fc_transport, but not the
+ * remote port interface. As such, initialize to known non-values.
+ */
+ if (rport) {
+ fc_starget_node_name(starget) = rport->node_name;
+ fc_starget_port_name(starget) = rport->port_name;
+ fc_starget_port_id(starget) = rport->port_id;
+ } else {
+ fc_starget_node_name(starget) = -1;
+ fc_starget_port_name(starget) = -1;
+ fc_starget_port_id(starget) = -1;
+ }
+
+ return 0;
+}
+
+static DECLARE_TRANSPORT_CLASS(fc_transport_class,
+ "fc_transport",
+ fc_target_setup,
+ NULL,
+ NULL);
+
+static int fc_host_setup(struct transport_container *tc, struct device *dev,
+ struct class_device *cdev)
+{
+ struct Scsi_Host *shost = dev_to_shost(dev);
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+
+ /*
+ * Set default values easily detected by the midlayer as
+ * failure cases. The scsi lldd is responsible for initializing
+ * all transport attributes to valid values per host.
+ */
+ fc_host->node_name = -1;
+ fc_host->port_name = -1;
+ fc_host->permanent_port_name = -1;
+ fc_host->supported_classes = FC_COS_UNSPECIFIED;
+ memset(fc_host->supported_fc4s, 0,
+ sizeof(fc_host->supported_fc4s));
+ fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
+ fc_host->maxframe_size = -1;
+ memset(fc_host->serial_number, 0,
+ sizeof(fc_host->serial_number));
+
+ fc_host->port_id = -1;
+ fc_host->port_type = FC_PORTTYPE_UNKNOWN;
+ fc_host->port_state = FC_PORTSTATE_UNKNOWN;
+ memset(fc_host->active_fc4s, 0,
+ sizeof(fc_host->active_fc4s));
+ fc_host->speed = FC_PORTSPEED_UNKNOWN;
+ fc_host->fabric_name = -1;
+ memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
+ memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
+
+ fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
+
+ INIT_LIST_HEAD(&fc_host->rports);
+ INIT_LIST_HEAD(&fc_host->rport_bindings);
+ fc_host->next_rport_number = 0;
+ fc_host->next_target_id = 0;
+
+ snprintf(fc_host->work_q_name, KOBJ_NAME_LEN, "fc_wq_%d",
+ shost->host_no);
+ fc_host->work_q = create_singlethread_workqueue(
+ fc_host->work_q_name);
+ if (!fc_host->work_q)
+ return -ENOMEM;
+
+ snprintf(fc_host->devloss_work_q_name, KOBJ_NAME_LEN, "fc_dl_%d",
+ shost->host_no);
+ fc_host->devloss_work_q = create_singlethread_workqueue(
+ fc_host->devloss_work_q_name);
+ if (!fc_host->devloss_work_q) {
+ destroy_workqueue(fc_host->work_q);
+ fc_host->work_q = NULL;
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static DECLARE_TRANSPORT_CLASS(fc_host_class,
+ "fc_host",
+ fc_host_setup,
+ NULL,
+ NULL);
+
+/*
+ * Setup and Remove actions for remote ports are handled
+ * in the service functions below.
+ */
+static DECLARE_TRANSPORT_CLASS(fc_rport_class,
+ "fc_remote_ports",
+ NULL,
+ NULL,
+ NULL);
+
+/*
+ * Module Parameters
+ */
+
+/*
+ * dev_loss_tmo: the default number of seconds that the FC transport
+ * should insulate the loss of a remote port.
+ * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
+ */
+static unsigned int fc_dev_loss_tmo = 60; /* seconds */
+
+module_param_named(dev_loss_tmo, fc_dev_loss_tmo, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(dev_loss_tmo,
+ "Maximum number of seconds that the FC transport should"
+ " insulate the loss of a remote port. Once this value is"
+ " exceeded, the scsi target is removed. Value should be"
+ " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT.");
+
+/**
+ * Netlink Infrastructure
+ **/
+
+static atomic_t fc_event_seq;
+
+/**
+ * fc_get_event_number - Obtain the next sequential FC event number
+ *
+ * Notes:
+ * We could have inline'd 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_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)
+{
+ struct sk_buff *skb;
+ struct nlmsghdr *nlh;
+ struct fc_nl_event *event;
+ const char *name;
+ u32 len, skblen;
+ int err;
+
+ if (!scsi_nl_sock) {
+ err = -ENOENT;
+ goto send_fail;
+ }
+
+ len = FC_NL_MSGALIGN(sizeof(*event));
+ skblen = NLMSG_SPACE(len);
+
+ skb = alloc_skb(skblen, GFP_KERNEL);
+ if (!skb) {
+ err = -ENOBUFS;
+ goto send_fail;
+ }
+
+ nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
+ skblen - sizeof(*nlh), 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 = get_seconds();
+ event->vendor_id = 0;
+ event->host_no = shost->host_no;
+ event->event_datalen = sizeof(u32); /* bytes */
+ event->event_num = event_number;
+ event->event_code = event_code;
+ event->event_data = event_data;
+
+ err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
+ GFP_KERNEL);
+ if (err && (err != -ESRCH)) /* filter no recipient errors */
+ /* nlmsg_multicast already kfree_skb'd */
+ goto send_fail;
+
+ 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",
+ __FUNCTION__, shost->host_no,
+ (name) ? name : "<unknown>", event_data, err);
+ return;
+}
+EXPORT_SYMBOL(fc_host_post_event);
+
+
+/**
+ * fc_host_post_vendor_event - called to post a vendor unique event on
+ * a 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
+ *
+ * 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)
+{
+ struct sk_buff *skb;
+ struct nlmsghdr *nlh;
+ struct fc_nl_event *event;
+ u32 len, skblen;
+ int err;
+
+ if (!scsi_nl_sock) {
+ err = -ENOENT;
+ goto send_vendor_fail;
+ }
+
+ len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
+ skblen = NLMSG_SPACE(len);
+
+ skb = alloc_skb(skblen, GFP_KERNEL);
+ if (!skb) {
+ err = -ENOBUFS;
+ goto send_vendor_fail;
+ }
+
+ nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
+ skblen - sizeof(*nlh), 0);
+ if (!nlh) {
+ err = -ENOBUFS;
+ goto send_vendor_fail_skb;
+ }
+ event = NLMSG_DATA(nlh);
+
+ INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
+ FC_NL_ASYNC_EVENT, len);
+ event->seconds = get_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 = FCH_EVT_VENDOR_UNIQUE;
+ memcpy(&event->event_data, data_buf, data_len);
+
+ err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
+ GFP_KERNEL);
+ if (err && (err != -ESRCH)) /* filter no recipient errors */
+ /* nlmsg_multicast already kfree_skb'd */
+ goto send_vendor_fail;
+
+ return;
+
+send_vendor_fail_skb:
+ kfree_skb(skb);
+send_vendor_fail:
+ printk(KERN_WARNING
+ "%s: Dropped Event : host %d vendor_unique - err %d\n",
+ __FUNCTION__, shost->host_no, err);
+ return;
+}
+EXPORT_SYMBOL(fc_host_post_vendor_event);
+
+
static __init int fc_transport_init(void)
{
- return class_register(&fc_transport_class);
+ int error;
+
+ atomic_set(&fc_event_seq, 0);
+
+ error = transport_class_register(&fc_host_class);
+ if (error)
+ return error;
+ error = transport_class_register(&fc_rport_class);
+ if (error)
+ return error;
+ return transport_class_register(&fc_transport_class);
}
static void __exit fc_transport_exit(void)
{
- class_unregister(&fc_transport_class);
+ transport_class_unregister(&fc_transport_class);
+ transport_class_unregister(&fc_rport_class);
+ transport_class_unregister(&fc_host_class);
+}
+
+/*
+ * FC Remote Port Attribute Management
+ */
+
+#define fc_rport_show_function(field, format_string, sz, cast) \
+static ssize_t \
+show_fc_rport_##field (struct class_device *cdev, char *buf) \
+{ \
+ struct fc_rport *rport = transport_class_to_rport(cdev); \
+ struct Scsi_Host *shost = rport_to_shost(rport); \
+ struct fc_internal *i = to_fc_internal(shost->transportt); \
+ if ((i->f->get_rport_##field) && \
+ !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
+ (rport->port_state == FC_PORTSTATE_DELETED) || \
+ (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
+ i->f->get_rport_##field(rport); \
+ return snprintf(buf, sz, format_string, cast rport->field); \
+}
+
+#define fc_rport_store_function(field) \
+static ssize_t \
+store_fc_rport_##field(struct class_device *cdev, const char *buf, \
+ size_t count) \
+{ \
+ int val; \
+ struct fc_rport *rport = transport_class_to_rport(cdev); \
+ struct Scsi_Host *shost = rport_to_shost(rport); \
+ struct fc_internal *i = to_fc_internal(shost->transportt); \
+ 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_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
+ show_fc_rport_##field, NULL)
+
+#define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
+ fc_rport_show_function(field, format_string, sz, (cast)) \
+static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
+ show_fc_rport_##field, NULL)
+
+#define fc_rport_rw_attr(field, format_string, sz) \
+ fc_rport_show_function(field, format_string, sz, ) \
+ fc_rport_store_function(field) \
+static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
+ show_fc_rport_##field, \
+ store_fc_rport_##field)
+
+
+#define fc_private_rport_show_function(field, format_string, sz, cast) \
+static ssize_t \
+show_fc_rport_##field (struct class_device *cdev, char *buf) \
+{ \
+ struct fc_rport *rport = transport_class_to_rport(cdev); \
+ return snprintf(buf, sz, format_string, cast rport->field); \
+}
+
+#define fc_private_rport_rd_attr(field, format_string, sz) \
+ fc_private_rport_show_function(field, format_string, sz, ) \
+static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
+ show_fc_rport_##field, NULL)
+
+#define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
+ fc_private_rport_show_function(field, format_string, sz, (cast)) \
+static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
+ show_fc_rport_##field, NULL)
+
+
+#define fc_private_rport_rd_enum_attr(title, maxlen) \
+static ssize_t \
+show_fc_rport_##title (struct class_device *cdev, char *buf) \
+{ \
+ struct fc_rport *rport = transport_class_to_rport(cdev); \
+ const char *name; \
+ name = get_fc_##title##_name(rport->title); \
+ if (!name) \
+ return -EINVAL; \
+ return snprintf(buf, maxlen, "%s\n", name); \
+} \
+static FC_CLASS_DEVICE_ATTR(rport, title, S_IRUGO, \
+ show_fc_rport_##title, NULL)
+
+
+#define SETUP_RPORT_ATTRIBUTE_RD(field) \
+ i->private_rport_attrs[count] = class_device_attr_rport_##field; \
+ i->private_rport_attrs[count].attr.mode = S_IRUGO; \
+ i->private_rport_attrs[count].store = NULL; \
+ i->rport_attrs[count] = &i->private_rport_attrs[count]; \
+ if (i->f->show_rport_##field) \
+ count++
+
+#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
+ i->private_rport_attrs[count] = class_device_attr_rport_##field; \
+ i->private_rport_attrs[count].attr.mode = S_IRUGO; \
+ i->private_rport_attrs[count].store = NULL; \
+ i->rport_attrs[count] = &i->private_rport_attrs[count]; \
+ count++
+
+#define SETUP_RPORT_ATTRIBUTE_RW(field) \
+ i->private_rport_attrs[count] = class_device_attr_rport_##field; \
+ if (!i->f->set_rport_##field) { \
+ i->private_rport_attrs[count].attr.mode = S_IRUGO; \
+ i->private_rport_attrs[count].store = NULL; \
+ } \
+ i->rport_attrs[count] = &i->private_rport_attrs[count]; \
+ if (i->f->show_rport_##field) \
+ count++
+
+#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
+{ \
+ i->private_rport_attrs[count] = class_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 class_device *cdev, char *buf)
+{
+ struct fc_rport *rport = transport_class_to_rport(cdev);
+ if (rport->supported_classes == FC_COS_UNSPECIFIED)
+ return snprintf(buf, 20, "unspecified\n");
+ return get_fc_cos_names(rport->supported_classes, buf);
+}
+static FC_CLASS_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
+ show_fc_rport_supported_classes, NULL);
+
+/* Dynamic Remote Port Attributes */
+
+/*
+ * dev_loss_tmo attribute
+ */
+fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
+static ssize_t
+store_fc_rport_dev_loss_tmo(struct class_device *cdev, const char *buf,
+ size_t count)
+{
+ int val;
+ struct fc_rport *rport = transport_class_to_rport(cdev);
+ struct Scsi_Host *shost = rport_to_shost(rport);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ 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')) ||
+ (val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
+ return -EINVAL;
+ i->f->set_rport_dev_loss_tmo(rport, val);
+ return count;
}
+static FC_CLASS_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
+ show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
+
+
+/* Private Remote Port Attributes */
-static int fc_setup_transport_attrs(struct scsi_device *sdev)
+fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
+fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
+fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
+
+static ssize_t
+show_fc_rport_roles (struct class_device *cdev, char *buf)
{
- /* I'm not sure what values are invalid. We should pick some invalid
- * values for the defaults */
- fc_node_name(sdev) = -1;
- fc_port_name(sdev) = -1;
- fc_port_id(sdev) = -1;
+ struct fc_rport *rport = transport_class_to_rport(cdev);
- return 0;
+ /* identify any roles that are port_id specific */
+ if ((rport->port_id != -1) &&
+ (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
+ FC_WELLKNOWN_PORTID_MASK) {
+ switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
+ case FC_FPORT_PORTID:
+ return snprintf(buf, 30, "Fabric Port\n");
+ case FC_FABCTLR_PORTID:
+ return snprintf(buf, 30, "Fabric Controller\n");
+ case FC_DIRSRVR_PORTID:
+ return snprintf(buf, 30, "Directory Server\n");
+ case FC_TIMESRVR_PORTID:
+ return snprintf(buf, 30, "Time Server\n");
+ case FC_MGMTSRVR_PORTID:
+ return snprintf(buf, 30, "Management Server\n");
+ default:
+ return snprintf(buf, 30, "Unknown Fabric Entity\n");
+ }
+ } else {
+ if (rport->roles == FC_RPORT_ROLE_UNKNOWN)
+ return snprintf(buf, 20, "unknown\n");
+ return get_fc_remote_port_roles_names(rport->roles, buf);
+ }
+}
+static FC_CLASS_DEVICE_ATTR(rport, roles, S_IRUGO,
+ show_fc_rport_roles, NULL);
+
+fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
+fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
+
+/*
+ * fast_io_fail_tmo attribute
+ */
+static ssize_t
+show_fc_rport_fast_io_fail_tmo (struct class_device *cdev, char *buf)
+{
+ struct fc_rport *rport = transport_class_to_rport(cdev);
+
+ 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 void transport_class_release(struct class_device *class_dev)
+static ssize_t
+store_fc_rport_fast_io_fail_tmo(struct class_device *cdev, const char *buf,
+ size_t count)
{
- struct scsi_device *sdev = transport_class_to_sdev(class_dev);
- put_device(&sdev->sdev_gendev);
+ int val;
+ char *cp;
+ struct fc_rport *rport = transport_class_to_rport(cdev);
+
+ 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) || (val >= rport->dev_loss_tmo))
+ return -EINVAL;
+ rport->fast_io_fail_tmo = val;
+ }
+ return count;
}
+static FC_CLASS_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_transport_show_function(field, format_string, cast) \
- \
+
+/*
+ * FC SCSI Target Attribute Management
+ */
+
+/*
+ * Note: in the target show function we recognize when the remote
+ * port is in the heirarchy and do not allow the driver to get
+ * involved in sysfs functions. The driver only gets involved if
+ * it's the "old" style that doesn't use rports.
+ */
+#define fc_starget_show_function(field, format_string, sz, cast) \
+static ssize_t \
+show_fc_starget_##field (struct class_device *cdev, char *buf) \
+{ \
+ struct scsi_target *starget = transport_class_to_starget(cdev); \
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
+ struct fc_internal *i = to_fc_internal(shost->transportt); \
+ struct fc_rport *rport = starget_to_rport(starget); \
+ if (rport) \
+ fc_starget_##field(starget) = rport->field; \
+ else if (i->f->get_starget_##field) \
+ i->f->get_starget_##field(starget); \
+ return snprintf(buf, sz, format_string, \
+ cast fc_starget_##field(starget)); \
+}
+
+#define fc_starget_rd_attr(field, format_string, sz) \
+ fc_starget_show_function(field, format_string, sz, ) \
+static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \
+ show_fc_starget_##field, NULL)
+
+#define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
+ fc_starget_show_function(field, format_string, sz, (cast)) \
+static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \
+ show_fc_starget_##field, NULL)
+
+#define SETUP_STARGET_ATTRIBUTE_RD(field) \
+ i->private_starget_attrs[count] = class_device_attr_starget_##field; \
+ i->private_starget_attrs[count].attr.mode = S_IRUGO; \
+ i->private_starget_attrs[count].store = NULL; \
+ i->starget_attrs[count] = &i->private_starget_attrs[count]; \
+ if (i->f->show_starget_##field) \
+ count++
+
+#define SETUP_STARGET_ATTRIBUTE_RW(field) \
+ i->private_starget_attrs[count] = class_device_attr_starget_##field; \
+ if (!i->f->set_starget_##field) { \
+ i->private_starget_attrs[count].attr.mode = S_IRUGO; \
+ i->private_starget_attrs[count].store = NULL; \
+ } \
+ i->starget_attrs[count] = &i->private_starget_attrs[count]; \
+ if (i->f->show_starget_##field) \
+ count++
+
+/* The FC Transport SCSI Target Attributes: */
+fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
+fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
+fc_starget_rd_attr(port_id, "0x%06x\n", 20);
+
+
+/*
+ * Host Attribute Management
+ */
+
+#define fc_host_show_function(field, format_string, sz, cast) \
static ssize_t \
-show_fc_transport_##field (struct class_device *cdev, char *buf) \
+show_fc_host_##field (struct class_device *cdev, char *buf) \
{ \
- struct scsi_device *sdev = transport_class_to_sdev(cdev); \
- struct fc_transport_attrs *tp; \
- struct fc_internal *i = to_fc_internal(sdev->host->transportt); \
- tp = (struct fc_transport_attrs *)&sdev->transport_data; \
- if (i->f->get_##field) \
- i->f->get_##field(sdev); \
- return snprintf(buf, 20, format_string, cast tp->field); \
+ struct Scsi_Host *shost = transport_class_to_shost(cdev); \
+ struct fc_internal *i = to_fc_internal(shost->transportt); \
+ if (i->f->get_host_##field) \
+ i->f->get_host_##field(shost); \
+ return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
}
-#define fc_transport_store_function(field, format_string) \
+#define fc_host_store_function(field) \
static ssize_t \
-store_fc_transport_##field(struct class_device *cdev, const char *buf, \
+store_fc_host_##field(struct class_device *cdev, const char *buf, \
size_t count) \
{ \
int val; \
- struct scsi_device *sdev = transport_class_to_sdev(cdev); \
- struct fc_internal *i = to_fc_internal(sdev->host->transportt); \
+ struct Scsi_Host *shost = transport_class_to_shost(cdev); \
+ struct fc_internal *i = to_fc_internal(shost->transportt); \
+ char *cp; \
\
- val = simple_strtoul(buf, NULL, 0); \
- i->f->set_##field(sdev, val); \
+ val = simple_strtoul(buf, &cp, 0); \
+ if (*cp && (*cp != '\n')) \
+ return -EINVAL; \
+ i->f->set_host_##field(shost, val); \
return count; \
}
-#define fc_transport_rd_attr(field, format_string) \
- fc_transport_show_function(field, format_string, ) \
-static CLASS_DEVICE_ATTR(field, S_IRUGO, \
- show_fc_transport_##field, NULL)
-
-#define fc_transport_rd_attr_cast(field, format_string, cast) \
- fc_transport_show_function(field, format_string, (cast)) \
-static CLASS_DEVICE_ATTR( field, S_IRUGO, \
- show_fc_transport_##field, NULL)
-
-#define fc_transport_rw_attr(field, format_string) \
- fc_transport_show_function(field, format_string, ) \
- fc_transport_store_function(field, format_string) \
-static CLASS_DEVICE_ATTR(field, S_IRUGO | S_IWUSR, \
- show_fc_transport_##field, \
- store_fc_transport_##field)
-
-/* the FiberChannel Tranport Attributes: */
-fc_transport_rd_attr_cast(node_name, "0x%llx\n", unsigned long long);
-fc_transport_rd_attr_cast(port_name, "0x%llx\n", unsigned long long);
-fc_transport_rd_attr(port_id, "0x%06x\n");
-
-#define SETUP_ATTRIBUTE_RD(field) \
- i->private_attrs[count] = class_device_attr_##field; \
- i->private_attrs[count].attr.mode = S_IRUGO; \
- i->private_attrs[count].store = NULL; \
- i->attrs[count] = &i->private_attrs[count]; \
- if (i->f->show_##field) \
+#define fc_host_store_str_function(field, slen) \
+static ssize_t \
+store_fc_host_##field(struct class_device *cdev, const char *buf, \
+ size_t count) \
+{ \
+ struct Scsi_Host *shost = transport_class_to_shost(cdev); \
+ struct fc_internal *i = to_fc_internal(shost->transportt); \
+ 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_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
+ show_fc_host_##field, NULL)
+
+#define fc_host_rd_attr_cast(field, format_string, sz, cast) \
+ fc_host_show_function(field, format_string, sz, (cast)) \
+static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
+ show_fc_host_##field, NULL)
+
+#define fc_host_rw_attr(field, format_string, sz) \
+ fc_host_show_function(field, format_string, sz, ) \
+ fc_host_store_function(field) \
+static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
+ show_fc_host_##field, \
+ store_fc_host_##field)
+
+#define fc_host_rd_enum_attr(title, maxlen) \
+static ssize_t \
+show_fc_host_##title (struct class_device *cdev, char *buf) \
+{ \
+ struct Scsi_Host *shost = transport_class_to_shost(cdev); \
+ struct fc_internal *i = to_fc_internal(shost->transportt); \
+ const char *name; \
+ if (i->f->get_host_##title) \
+ i->f->get_host_##title(shost); \
+ name = get_fc_##title##_name(fc_host_##title(shost)); \
+ if (!name) \
+ return -EINVAL; \
+ return snprintf(buf, maxlen, "%s\n", name); \
+} \
+static FC_CLASS_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
+
+#define SETUP_HOST_ATTRIBUTE_RD(field) \
+ i->private_host_attrs[count] = class_device_attr_host_##field; \
+ i->private_host_attrs[count].attr.mode = S_IRUGO; \
+ i->private_host_attrs[count].store = NULL; \
+ i->host_attrs[count] = &i->private_host_attrs[count]; \
+ if (i->f->show_host_##field) \
count++
-#define SETUP_ATTRIBUTE_RW(field) \
- i->private_attrs[count] = class_device_attr_##field; \
- if (!i->f->set_##field) { \
- i->private_attrs[count].attr.mode = S_IRUGO; \
- i->private_attrs[count].store = NULL; \
- } \
- i->attrs[count] = &i->private_attrs[count]; \
- if (i->f->show_##field) \
+#define SETUP_HOST_ATTRIBUTE_RW(field) \
+ i->private_host_attrs[count] = class_device_attr_host_##field; \
+ if (!i->f->set_host_##field) { \
+ i->private_host_attrs[count].attr.mode = S_IRUGO; \
+ i->private_host_attrs[count].store = NULL; \
+ } \
+ i->host_attrs[count] = &i->private_host_attrs[count]; \
+ if (i->f->show_host_##field) \
count++
-struct scsi_transport_template *
-fc_attach_transport(struct fc_function_template *ft)
+
+#define fc_private_host_show_function(field, format_string, sz, cast) \
+static ssize_t \
+show_fc_host_##field (struct class_device *cdev, char *buf) \
+{ \
+ struct Scsi_Host *shost = transport_class_to_shost(cdev); \
+ return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
+}
+
+#define fc_private_host_rd_attr(field, format_string, sz) \
+ fc_private_host_show_function(field, format_string, sz, ) \
+static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
+ show_fc_host_##field, NULL)
+
+#define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
+ fc_private_host_show_function(field, format_string, sz, (cast)) \
+static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
+ show_fc_host_##field, NULL)
+
+#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
+ i->private_host_attrs[count] = class_device_attr_host_##field; \
+ i->private_host_attrs[count].attr.mode = S_IRUGO; \
+ i->private_host_attrs[count].store = NULL; \
+ i->host_attrs[count] = &i->private_host_attrs[count]; \
+ count++
+
+#define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
+{ \
+ i->private_host_attrs[count] = class_device_attr_host_##field; \
+ i->host_attrs[count] = &i->private_host_attrs[count]; \
+ count++; \
+}
+
+
+/* Fixed Host Attributes */
+
+static ssize_t
+show_fc_host_supported_classes (struct class_device *cdev, char *buf)
{
- struct fc_internal *i = kmalloc(sizeof(struct fc_internal),
- GFP_KERNEL);
- int count = 0;
+ struct Scsi_Host *shost = transport_class_to_shost(cdev);
- if (unlikely(!i))
- return NULL;
+ if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
+ return snprintf(buf, 20, "unspecified\n");
- memset(i, 0, sizeof(struct fc_internal));
+ return get_fc_cos_names(fc_host_supported_classes(shost), buf);
+}
+static FC_CLASS_DEVICE_ATTR(host, supported_classes, S_IRUGO,
+ show_fc_host_supported_classes, NULL);
- i->t.attrs = &i->attrs[0];
- i->t.class = &fc_transport_class;
- i->t.setup = &fc_setup_transport_attrs;
- i->t.size = sizeof(struct fc_transport_attrs);
- i->f = ft;
+static ssize_t
+show_fc_host_supported_fc4s (struct class_device *cdev, char *buf)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(cdev);
+ return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
+}
+static FC_CLASS_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
+ show_fc_host_supported_fc4s, NULL);
- SETUP_ATTRIBUTE_RD(port_id);
- SETUP_ATTRIBUTE_RD(port_name);
- SETUP_ATTRIBUTE_RD(node_name);
+static ssize_t
+show_fc_host_supported_speeds (struct class_device *cdev, char *buf)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(cdev);
+
+ if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
+ return snprintf(buf, 20, "unknown\n");
- BUG_ON(count > FC_NUM_ATTRS);
+ return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
+}
+static FC_CLASS_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
+ show_fc_host_supported_speeds, NULL);
- /* Setup the always-on attributes here */
- i->attrs[count] = 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(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
- return &i->t;
+
+/* Dynamic Host Attributes */
+
+static ssize_t
+show_fc_host_active_fc4s (struct class_device *cdev, char *buf)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(cdev);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+
+ if (i->f->get_host_active_fc4s)
+ i->f->get_host_active_fc4s(shost);
+
+ return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
}
-EXPORT_SYMBOL(fc_attach_transport);
+static FC_CLASS_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
+ show_fc_host_active_fc4s, NULL);
-void fc_release_transport(struct scsi_transport_template *t)
+static ssize_t
+show_fc_host_speed (struct class_device *cdev, char *buf)
{
- struct fc_internal *i = to_fc_internal(t);
+ struct Scsi_Host *shost = transport_class_to_shost(cdev);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
- kfree(i);
+ if (i->f->get_host_speed)
+ i->f->get_host_speed(shost);
+
+ if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
+ return snprintf(buf, 20, "unknown\n");
+
+ return get_fc_port_speed_names(fc_host_speed(shost), buf);
+}
+static FC_CLASS_DEVICE_ATTR(host, speed, S_IRUGO,
+ show_fc_host_speed, NULL);
+
+
+fc_host_rd_attr(port_id, "0x%06x\n", 20);
+fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
+fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
+fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
+fc_host_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_CLASS_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 class_device *cdev, char *buf)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(cdev);
+ const char *name;
+
+ name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
+ if (!name)
+ return -EINVAL;
+ return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
+}
+
+#define get_list_head_entry(pos, head, member) \
+ pos = list_entry((head)->next, typeof(*pos), member)
+
+static ssize_t
+store_fc_private_host_tgtid_bind_type(struct class_device *cdev,
+ const char *buf, size_t count)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(cdev);
+ struct fc_rport *rport;
+ enum fc_tgtid_binding_type val;
+ unsigned long flags;
+
+ if (get_fc_tgtid_bind_type_match(buf, &val))
+ return -EINVAL;
+
+ /* if changing bind type, purge all unused consistent bindings */
+ if (val != fc_host_tgtid_bind_type(shost)) {
+ spin_lock_irqsave(shost->host_lock, flags);
+ while (!list_empty(&fc_host_rport_bindings(shost))) {
+ get_list_head_entry(rport,
+ &fc_host_rport_bindings(shost), peers);
+ list_del(&rport->peers);
+ rport->port_state = FC_PORTSTATE_DELETED;
+ fc_queue_work(shost, &rport->rport_delete_work);
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ }
+
+ fc_host_tgtid_bind_type(shost) = val;
+ return count;
+}
+
+static FC_CLASS_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
+ show_fc_private_host_tgtid_bind_type,
+ store_fc_private_host_tgtid_bind_type);
+
+static ssize_t
+store_fc_private_host_issue_lip(struct class_device *cdev,
+ const char *buf, size_t count)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(cdev);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ int ret;
+
+ /* ignore any data value written to the attribute */
+ if (i->f->issue_fc_host_lip) {
+ ret = i->f->issue_fc_host_lip(shost);
+ return ret ? ret: count;
+ }
+
+ return -ENOENT;
+}
+
+static FC_CLASS_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
+ store_fc_private_host_issue_lip);
+
+/*
+ * Host Statistics Management
+ */
+
+/* Show a given an attribute in the statistics group */
+static ssize_t
+fc_stat_show(const struct class_device *cdev, char *buf, unsigned long offset)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(cdev);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ struct fc_host_statistics *stats;
+ ssize_t ret = -ENOENT;
+
+ if (offset > sizeof(struct fc_host_statistics) ||
+ offset % sizeof(u64) != 0)
+ WARN_ON(1);
+
+ if (i->f->get_fc_host_stats) {
+ stats = (i->f->get_fc_host_stats)(shost);
+ if (stats)
+ ret = snprintf(buf, 20, "0x%llx\n",
+ (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
+ }
+ return ret;
+}
+
+
+/* generate a read-only statistics attribute */
+#define fc_host_statistic(name) \
+static ssize_t show_fcstat_##name(struct class_device *cd, char *buf) \
+{ \
+ return fc_stat_show(cd, buf, \
+ offsetof(struct fc_host_statistics, name)); \
+} \
+static FC_CLASS_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
+
+fc_host_statistic(seconds_since_last_reset);
+fc_host_statistic(tx_frames);
+fc_host_statistic(tx_words);
+fc_host_statistic(rx_frames);
+fc_host_statistic(rx_words);
+fc_host_statistic(lip_count);
+fc_host_statistic(nos_count);
+fc_host_statistic(error_frames);
+fc_host_statistic(dumped_frames);
+fc_host_statistic(link_failure_count);
+fc_host_statistic(loss_of_sync_count);
+fc_host_statistic(loss_of_signal_count);
+fc_host_statistic(prim_seq_protocol_err_count);
+fc_host_statistic(invalid_tx_word_count);
+fc_host_statistic(invalid_crc_count);
+fc_host_statistic(fcp_input_requests);
+fc_host_statistic(fcp_output_requests);
+fc_host_statistic(fcp_control_requests);
+fc_host_statistic(fcp_input_megabytes);
+fc_host_statistic(fcp_output_megabytes);
+
+static ssize_t
+fc_reset_statistics(struct class_device *cdev, const char *buf,
+ size_t count)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(cdev);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+
+ /* ignore any data value written to the attribute */
+ if (i->f->reset_fc_host_stats) {
+ i->f->reset_fc_host_stats(shost);
+ return count;
+ }
+
+ return -ENOENT;
+}
+static FC_CLASS_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
+ fc_reset_statistics);
+
+
+static struct attribute *fc_statistics_attrs[] = {
+ &class_device_attr_host_seconds_since_last_reset.attr,
+ &class_device_attr_host_tx_frames.attr,
+ &class_device_attr_host_tx_words.attr,
+ &class_device_attr_host_rx_frames.attr,
+ &class_device_attr_host_rx_words.attr,
+ &class_device_attr_host_lip_count.attr,
+ &class_device_attr_host_nos_count.attr,
+ &class_device_attr_host_error_frames.attr,
+ &class_device_attr_host_dumped_frames.attr,
+ &class_device_attr_host_link_failure_count.attr,
+ &class_device_attr_host_loss_of_sync_count.attr,
+ &class_device_attr_host_loss_of_signal_count.attr,
+ &class_device_attr_host_prim_seq_protocol_err_count.attr,
+ &class_device_attr_host_invalid_tx_word_count.attr,
+ &class_device_attr_host_invalid_crc_count.attr,
+ &class_device_attr_host_fcp_input_requests.attr,
+ &class_device_attr_host_fcp_output_requests.attr,
+ &class_device_attr_host_fcp_control_requests.attr,
+ &class_device_attr_host_fcp_input_megabytes.attr,
+ &class_device_attr_host_fcp_output_megabytes.attr,
+ &class_device_attr_host_reset_statistics.attr,
+ NULL
+};
+
+static struct attribute_group fc_statistics_group = {
+ .name = "statistics",
+ .attrs = fc_statistics_attrs,
+};
+
+static int fc_host_match(struct attribute_container *cont,
+ struct device *dev)
+{
+ struct Scsi_Host *shost;
+ struct fc_internal *i;
+
+ if (!scsi_is_host_device(dev))
+ return 0;
+
+ shost = dev_to_shost(dev);
+ if (!shost->transportt || shost->transportt->host_attrs.ac.class
+ != &fc_host_class.class)
+ return 0;
+
+ i = to_fc_internal(shost->transportt);
+
+ return &i->t.host_attrs.ac == cont;
+}
+
+static int fc_target_match(struct attribute_container *cont,
+ struct device *dev)
+{
+ struct Scsi_Host *shost;
+ struct fc_internal *i;
+
+ if (!scsi_is_target_device(dev))
+ return 0;
+
+ shost = dev_to_shost(dev->parent);
+ if (!shost->transportt || shost->transportt->host_attrs.ac.class
+ != &fc_host_class.class)
+ return 0;
+
+ i = to_fc_internal(shost->transportt);
+
+ return &i->t.target_attrs.ac == cont;
+}
+
+static void fc_rport_dev_release(struct device *dev)
+{
+ struct fc_rport *rport = dev_to_rport(dev);
+ put_device(dev->parent);
+ kfree(rport);
+}
+
+int scsi_is_fc_rport(const struct device *dev)
+{
+ return dev->release == fc_rport_dev_release;
+}
+EXPORT_SYMBOL(scsi_is_fc_rport);
+
+static int fc_rport_match(struct attribute_container *cont,
+ struct device *dev)
+{
+ struct Scsi_Host *shost;
+ struct fc_internal *i;
+
+ if (!scsi_is_fc_rport(dev))
+ return 0;
+
+ shost = dev_to_shost(dev->parent);
+ if (!shost->transportt || shost->transportt->host_attrs.ac.class
+ != &fc_host_class.class)
+ return 0;
+
+ i = to_fc_internal(shost->transportt);
+
+ return &i->rport_attr_cont.ac == cont;
+}
+
+
+/**
+ * fc_timed_out - FC Transport I/O timeout intercept handler
+ *
+ * @scmd: The SCSI command which timed out
+ *
+ * This routine protects against error handlers getting invoked while a
+ * rport is in a blocked state, typically due to a temporarily loss of
+ * connectivity. If the error handlers are allowed to proceed, requests
+ * to abort i/o, reset the target, etc will likely fail as there is no way
+ * to communicate with the device to perform the requested function. These
+ * failures may result in the midlayer taking the device offline, requiring
+ * manual intervention to restore operation.
+ *
+ * This routine, called whenever an i/o times out, validates the state of
+ * the underlying rport. If the rport is blocked, it returns
+ * EH_RESET_TIMER, which will continue to reschedule the timeout.
+ * Eventually, either the device will return, or devloss_tmo will fire,
+ * and when the timeout then fires, it will be handled normally.
+ * If the rport is not blocked, normal error handling continues.
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ **/
+static enum scsi_eh_timer_return
+fc_timed_out(struct scsi_cmnd *scmd)
+{
+ struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
+
+ if (rport->port_state == FC_PORTSTATE_BLOCKED)
+ return EH_RESET_TIMER;
+
+ return EH_NOT_HANDLED;
+}
+
+/*
+ * Must be called with shost->host_lock held
+ */
+static int fc_user_scan(struct Scsi_Host *shost, uint channel,
+ uint id, uint lun)
+{
+ struct fc_rport *rport;
+
+ list_for_each_entry(rport, &fc_host_rports(shost), peers) {
+ if (rport->scsi_target_id == -1)
+ continue;
+
+ if ((channel == SCAN_WILD_CARD || channel == rport->channel) &&
+ (id == SCAN_WILD_CARD || id == rport->scsi_target_id)) {
+ scsi_scan_target(&rport->dev, rport->channel,
+ rport->scsi_target_id, lun, 1);
+ }
+ }
+
+ return 0;
+}
+
+struct scsi_transport_template *
+fc_attach_transport(struct fc_function_template *ft)
+{
+ int count;
+ struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
+ GFP_KERNEL);
+
+ if (unlikely(!i))
+ return NULL;
+
+ i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
+ i->t.target_attrs.ac.class = &fc_transport_class.class;
+ i->t.target_attrs.ac.match = fc_target_match;
+ i->t.target_size = sizeof(struct fc_starget_attrs);
+ transport_container_register(&i->t.target_attrs);
+
+ i->t.host_attrs.ac.attrs = &i->host_attrs[0];
+ i->t.host_attrs.ac.class = &fc_host_class.class;
+ i->t.host_attrs.ac.match = fc_host_match;
+ i->t.host_size = sizeof(struct fc_host_attrs);
+ if (ft->get_fc_host_stats)
+ i->t.host_attrs.statistics = &fc_statistics_group;
+ transport_container_register(&i->t.host_attrs);
+
+ i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
+ i->rport_attr_cont.ac.class = &fc_rport_class.class;
+ i->rport_attr_cont.ac.match = fc_rport_match;
+ transport_container_register(&i->rport_attr_cont);
+
+ i->f = ft;
+
+ /* Transport uses the shost workq for scsi scanning */
+ i->t.create_work_queue = 1;
+
+ i->t.eh_timed_out = fc_timed_out;
+
+ i->t.user_scan = fc_user_scan;
+
+ /*
+ * Setup SCSI Target Attributes.
+ */
+ count = 0;
+ SETUP_STARGET_ATTRIBUTE_RD(node_name);
+ SETUP_STARGET_ATTRIBUTE_RD(port_name);
+ SETUP_STARGET_ATTRIBUTE_RD(port_id);
+
+ BUG_ON(count > FC_STARGET_NUM_ATTRS);
+
+ i->starget_attrs[count] = NULL;
+
+
+ /*
+ * Setup SCSI Host Attributes.
+ */
+ count=0;
+ SETUP_HOST_ATTRIBUTE_RD(node_name);
+ SETUP_HOST_ATTRIBUTE_RD(port_name);
+ SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
+ SETUP_HOST_ATTRIBUTE_RD(supported_classes);
+ SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
+ SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
+ SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
+ SETUP_HOST_ATTRIBUTE_RD(serial_number);
+
+ SETUP_HOST_ATTRIBUTE_RD(port_id);
+ SETUP_HOST_ATTRIBUTE_RD(port_type);
+ SETUP_HOST_ATTRIBUTE_RD(port_state);
+ SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
+ SETUP_HOST_ATTRIBUTE_RD(speed);
+ SETUP_HOST_ATTRIBUTE_RD(fabric_name);
+ SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
+ SETUP_HOST_ATTRIBUTE_RW(system_hostname);
+
+ /* Transport-managed attributes */
+ SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
+ if (ft->issue_fc_host_lip)
+ SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
+
+ BUG_ON(count > FC_HOST_NUM_ATTRS);
+
+ i->host_attrs[count] = NULL;
+
+ /*
+ * Setup Remote Port Attributes.
+ */
+ count=0;
+ SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
+ SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
+ SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
+ SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
+ SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
+ SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
+ SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
+ SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
+ SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
+ if (ft->terminate_rport_io)
+ SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
+
+ BUG_ON(count > FC_RPORT_NUM_ATTRS);
+
+ i->rport_attrs[count] = NULL;
+
+ return &i->t;
+}
+EXPORT_SYMBOL(fc_attach_transport);
+
+void fc_release_transport(struct scsi_transport_template *t)
+{
+ struct fc_internal *i = to_fc_internal(t);
+
+ transport_container_unregister(&i->t.target_attrs);
+ transport_container_unregister(&i->t.host_attrs);
+ transport_container_unregister(&i->rport_attr_cont);
+
+ kfree(i);
+}
+EXPORT_SYMBOL(fc_release_transport);
+
+/**
+ * fc_queue_work - Queue work to the fc_host workqueue.
+ * @shost: Pointer to Scsi_Host bound to fc_host.
+ * @work: Work to queue for execution.
+ *
+ * Return value:
+ * 1 - work queued for execution
+ * 0 - work is already queued
+ * -EINVAL - work queue doesn't exist
+ **/
+static int
+fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
+{
+ if (unlikely(!fc_host_work_q(shost))) {
+ printk(KERN_ERR
+ "ERROR: FC host '%s' attempted to queue work, "
+ "when no workqueue created.\n", shost->hostt->name);
+ dump_stack();
+
+ return -EINVAL;
+ }
+
+ return queue_work(fc_host_work_q(shost), work);
+}
+
+/**
+ * fc_flush_work - Flush a fc_host's workqueue.
+ * @shost: Pointer to Scsi_Host bound to fc_host.
+ **/
+static void
+fc_flush_work(struct Scsi_Host *shost)
+{
+ if (!fc_host_work_q(shost)) {
+ printk(KERN_ERR
+ "ERROR: FC host '%s' attempted to flush work, "
+ "when no workqueue created.\n", shost->hostt->name);
+ dump_stack();
+ return;
+ }
+
+ flush_workqueue(fc_host_work_q(shost));
+}
+
+/**
+ * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
+ * @shost: Pointer to Scsi_Host bound to fc_host.
+ * @work: Work to queue for execution.
+ * @delay: jiffies to delay the work queuing
+ *
+ * Return value:
+ * 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.
+ * @rport: remote port to be unblocked.
+ *
+ * This routine is expected to be called immediately preceeding the
+ * a driver's call to scsi_remove_host().
+ *
+ * WARNING: A driver utilizing the fc_transport, which fails to call
+ * this routine prior to scsi_remote_host(), will leave dangling
+ * objects in /sys/class/fc_remote_ports. Access to any of these
+ * objects can result in a system crash !!!
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ **/
+void
+fc_remove_host(struct Scsi_Host *shost)
+{
+ struct fc_rport *rport, *next_rport;
+ struct workqueue_struct *work_q;
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+
+ /* Remove any remote ports */
+ list_for_each_entry_safe(rport, next_rport,
+ &fc_host->rports, peers) {
+ list_del(&rport->peers);
+ rport->port_state = FC_PORTSTATE_DELETED;
+ fc_queue_work(shost, &rport->rport_delete_work);
+ }
+
+ list_for_each_entry_safe(rport, next_rport,
+ &fc_host->rport_bindings, peers) {
+ list_del(&rport->peers);
+ rport->port_state = FC_PORTSTATE_DELETED;
+ fc_queue_work(shost, &rport->rport_delete_work);
+ }
+
+ /* flush all scan work items */
+ scsi_flush_work(shost);
+
+ /* flush all stgt delete, and rport delete work items, then kill it */
+ if (fc_host->work_q) {
+ work_q = fc_host->work_q;
+ fc_host->work_q = NULL;
+ destroy_workqueue(work_q);
+ }
+
+ /* flush all devloss work items, then kill it */
+ if (fc_host->devloss_work_q) {
+ work_q = fc_host->devloss_work_q;
+ fc_host->devloss_work_q = NULL;
+ destroy_workqueue(work_q);
+ }
+}
+EXPORT_SYMBOL(fc_remove_host);
+
+
+/**
+ * fc_starget_delete - called to delete the scsi decendents of an rport
+ * (target and all sdevs)
+ *
+ * @work: remote port to be operated on.
+ **/
+static void
+fc_starget_delete(struct work_struct *work)
+{
+ struct fc_rport *rport =
+ container_of(work, struct fc_rport, stgt_delete_work);
+ struct Scsi_Host *shost = rport_to_shost(rport);
+ unsigned long flags;
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+
+ /*
+ * Involve the LLDD if possible. All io on the rport is to
+ * be terminated, either as part of the dev_loss_tmo callback
+ * processing, or via the terminate_rport_io function.
+ */
+ if (i->f->dev_loss_tmo_callbk)
+ i->f->dev_loss_tmo_callbk(rport);
+ else if (i->f->terminate_rport_io)
+ i->f->terminate_rport_io(rport);
+
+ 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);
+ spin_lock_irqsave(shost->host_lock, flags);
+ rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ scsi_remove_target(&rport->dev);
+}
+
+
+/**
+ * fc_rport_final_delete - finish rport termination and delete it.
+ *
+ * @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);
+
+ /*
+ * 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);
+
+ /* Delete SCSI target and sdevs */
+ if (rport->scsi_target_id != -1)
+ fc_starget_delete(&rport->stgt_delete_work);
+ else if (i->f->dev_loss_tmo_callbk)
+ i->f->dev_loss_tmo_callbk(rport);
+ else if (i->f->terminate_rport_io)
+ i->f->terminate_rport_io(rport);
+
+ transport_remove_device(dev);
+ device_del(dev);
+ transport_destroy_device(dev);
+ put_device(&shost->shost_gendev); /* for fc_host->rport list */
+ put_device(dev); /* for self-reference */
+}
+
+
+/**
+ * fc_rport_create - allocates and creates a remote FC port.
+ * @shost: scsi host the remote port is connected to.
+ * @channel: Channel on shost port connected to.
+ * @ids: The world wide names, fc address, and FC4 port
+ * roles for the remote port.
+ *
+ * Allocates and creates the remoter port structure, including the
+ * class and sysfs creation.
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ **/
+struct fc_rport *
+fc_rport_create(struct Scsi_Host *shost, int channel,
+ struct fc_rport_identifiers *ids)
+{
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+ struct fc_internal *fci = to_fc_internal(shost->transportt);
+ struct fc_rport *rport;
+ struct device *dev;
+ unsigned long flags;
+ int error;
+ size_t size;
+
+ size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
+ rport = kzalloc(size, GFP_KERNEL);
+ if (unlikely(!rport)) {
+ printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__);
+ return NULL;
+ }
+
+ rport->maxframe_size = -1;
+ rport->supported_classes = FC_COS_UNSPECIFIED;
+ rport->dev_loss_tmo = fc_dev_loss_tmo;
+ memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
+ memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
+ rport->port_id = ids->port_id;
+ rport->roles = ids->roles;
+ rport->port_state = FC_PORTSTATE_ONLINE;
+ if (fci->f->dd_fcrport_size)
+ rport->dd_data = &rport[1];
+ rport->channel = channel;
+ 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_RPORT_ROLE_FCP_TARGET)
+ rport->scsi_target_id = fc_host->next_target_id++;
+ else
+ rport->scsi_target_id = -1;
+ list_add_tail(&rport->peers, &fc_host->rports);
+ get_device(&shost->shost_gendev); /* 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;
+ sprintf(dev->bus_id, "rport-%d:%d-%d",
+ shost->host_no, channel, rport->number);
+ transport_setup_device(dev);
+
+ error = device_add(dev);
+ if (error) {
+ printk(KERN_ERR "FC Remote Port device_add failed\n");
+ goto delete_rport;
+ }
+ transport_add_device(dev);
+ transport_configure_device(dev);
+
+ if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) {
+ /* initiate a scan of the target */
+ rport->flags |= FC_RPORT_SCAN_PENDING;
+ scsi_queue_work(shost, &rport->scan_work);
+ }
+
+ return rport;
+
+delete_rport:
+ transport_destroy_device(dev);
+ spin_lock_irqsave(shost->host_lock, flags);
+ list_del(&rport->peers);
+ put_device(&shost->shost_gendev); /* for fc_host->rport list */
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ put_device(dev->parent);
+ kfree(rport);
+ return NULL;
+}
+
+/**
+ * fc_remote_port_add - notifies the fc transport of the existence
+ * of a remote FC port.
+ * @shost: scsi host the remote port is connected to.
+ * @channel: Channel on shost port connected to.
+ * @ids: The world wide names, fc address, and FC4 port
+ * roles for the remote port.
+ *
+ * The LLDD calls this routine to notify the transport of the existence
+ * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
+ * of the port, it's FC address (port_id), and the FC4 roles that are
+ * active for the port.
+ *
+ * For ports that are FCP targets (aka scsi targets), the FC transport
+ * maintains consistent target id bindings on behalf of the LLDD.
+ * A consistent target id binding is an assignment of a target id to
+ * a remote port identifier, which persists while the scsi host is
+ * attached. The remote port can disappear, then later reappear, and
+ * it's target id assignment remains the same. This allows for shifts
+ * in FC addressing (if binding by wwpn or wwnn) with no apparent
+ * changes to the scsi subsystem which is based on scsi host number and
+ * target id values. Bindings are only valid during the attachment of
+ * the scsi host. If the host detaches, then later re-attaches, target
+ * id bindings may change.
+ *
+ * This routine is responsible for returning a remote port structure.
+ * The routine will search the list of remote ports it maintains
+ * internally on behalf of consistent target id mappings. If found, the
+ * remote port structure will be reused. Otherwise, a new remote port
+ * structure will be allocated.
+ *
+ * Whenever a remote port is allocated, a new fc_remote_port class
+ * device is created.
+ *
+ * Should not be called from interrupt context.
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ **/
+struct fc_rport *
+fc_remote_port_add(struct Scsi_Host *shost, int channel,
+ struct fc_rport_identifiers *ids)
+{
+ struct fc_internal *fci = to_fc_internal(shost->transportt);
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+ struct fc_rport *rport;
+ unsigned long flags;
+ int match = 0;
+
+ /* ensure any stgt delete functions are done */
+ fc_flush_work(shost);
+
+ /*
+ * Search the list of "active" rports, for an rport that has been
+ * deleted, but we've held off the real delete while the target
+ * is in a "blocked" state.
+ */
+ spin_lock_irqsave(shost->host_lock, flags);
+
+ list_for_each_entry(rport, &fc_host->rports, peers) {
+
+ if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
+ (rport->channel == channel)) {
+
+ switch (fc_host->tgtid_bind_type) {
+ case FC_TGTID_BIND_BY_WWPN:
+ case FC_TGTID_BIND_NONE:
+ if (rport->port_name == ids->port_name)
+ match = 1;
+ break;
+ case FC_TGTID_BIND_BY_WWNN:
+ if (rport->node_name == ids->node_name)
+ match = 1;
+ break;
+ case FC_TGTID_BIND_BY_ID:
+ if (rport->port_id == ids->port_id)
+ match = 1;
+ break;
+ }
+
+ if (match) {
+ struct delayed_work *work =
+ &rport->dev_loss_work;
+
+ memcpy(&rport->node_name, &ids->node_name,
+ sizeof(rport->node_name));
+ memcpy(&rport->port_name, &ids->port_name,
+ sizeof(rport->port_name));
+ rport->port_id = ids->port_id;
+
+ rport->port_state = FC_PORTSTATE_ONLINE;
+ rport->roles = ids->roles;
+
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ if (fci->f->dd_fcrport_size)
+ memset(rport->dd_data, 0,
+ fci->f->dd_fcrport_size);
+
+ /*
+ * If we were blocked, we were a target.
+ * If no longer a target, we leave the timer
+ * running in case the port changes roles
+ * prior to the timer expiring. If the timer
+ * fires, the target will be torn down.
+ */
+ if (!(ids->roles & FC_RPORT_ROLE_FCP_TARGET))
+ return rport;
+
+ /* restart the target */
+
+ /*
+ * Stop the target timers first. 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(work))
+ fc_flush_devloss(shost);
+
+ spin_lock_irqsave(shost->host_lock, flags);
+
+ rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
+
+ /* initiate a scan of the target */
+ rport->flags |= FC_RPORT_SCAN_PENDING;
+ scsi_queue_work(shost, &rport->scan_work);
+
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ scsi_target_unblock(&rport->dev);
+
+ return rport;
+ }
+ }
+ }
+
+ /* Search the bindings array */
+ if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
+
+ /* search for a matching consistent binding */
+
+ list_for_each_entry(rport, &fc_host->rport_bindings,
+ peers) {
+ if (rport->channel != channel)
+ continue;
+
+ switch (fc_host->tgtid_bind_type) {
+ case FC_TGTID_BIND_BY_WWPN:
+ if (rport->port_name == ids->port_name)
+ match = 1;
+ break;
+ case FC_TGTID_BIND_BY_WWNN:
+ if (rport->node_name == ids->node_name)
+ match = 1;
+ break;
+ case FC_TGTID_BIND_BY_ID:
+ if (rport->port_id == ids->port_id)
+ match = 1;
+ break;
+ case FC_TGTID_BIND_NONE: /* to keep compiler happy */
+ break;
+ }
+
+ if (match) {
+ list_move_tail(&rport->peers, &fc_host->rports);
+ break;
+ }
+ }
+
+ if (match) {
+ memcpy(&rport->node_name, &ids->node_name,
+ sizeof(rport->node_name));
+ memcpy(&rport->port_name, &ids->port_name,
+ sizeof(rport->port_name));
+ rport->port_id = ids->port_id;
+ rport->roles = ids->roles;
+ rport->port_state = FC_PORTSTATE_ONLINE;
+
+ if (fci->f->dd_fcrport_size)
+ memset(rport->dd_data, 0,
+ fci->f->dd_fcrport_size);
+
+ if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) {
+ /* initiate a scan of the target */
+ rport->flags |= FC_RPORT_SCAN_PENDING;
+ scsi_queue_work(shost, &rport->scan_work);
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ scsi_target_unblock(&rport->dev);
+ } else
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ return rport;
+ }
+ }
+
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ /* No consistent binding found - create new remote port entry */
+ rport = fc_rport_create(shost, channel, ids);
+
+ return rport;
+}
+EXPORT_SYMBOL(fc_remote_port_add);
+
+
+/**
+ * fc_remote_port_delete - notifies the fc transport that a remote
+ * port is no longer in existence.
+ * @rport: The remote port that no longer exists
+ *
+ * The LLDD calls this routine to notify the transport that a remote
+ * port is no longer part of the topology. Note: Although a port
+ * may no longer be part of the topology, it may persist in the remote
+ * ports displayed by the fc_host. We do this under 2 conditions:
+ * - If the port was a scsi target, we delay its deletion by "blocking" it.
+ * This allows the port to temporarily disappear, then reappear without
+ * disrupting the SCSI device tree attached to it. During the "blocked"
+ * period the port will still exist.
+ * - If the port was a scsi target and disappears for longer than we
+ * expect, we'll delete the port and the tear down the SCSI device tree
+ * attached to it. However, we want to semi-persist the target id assigned
+ * to that port if it eventually does exist. The port structure will
+ * remain (although with minimal information) so that the target id
+ * bindings remails.
+ *
+ * If the remote port is not an FCP Target, it will be fully torn down
+ * and deallocated, including the fc_remote_port class device.
+ *
+ * If the remote port is an FCP Target, the port will be placed in a
+ * temporary blocked state. From the LLDD's perspective, the rport no
+ * longer exists. From the SCSI midlayer's perspective, the SCSI target
+ * exists, but all sdevs on it are blocked from further I/O. The following
+ * is then expected:
+ * If the remote port does not return (signaled by a LLDD call to
+ * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
+ * scsi target is removed - killing all outstanding i/o and removing the
+ * scsi devices attached ot it. The port structure will be marked Not
+ * Present and be partially cleared, leaving only enough information to
+ * recognize the remote port relative to the scsi target id binding if
+ * it later appears. The port will remain as long as there is a valid
+ * binding (e.g. until the user changes the binding type or unloads the
+ * scsi host with the binding).
+ *
+ * If the remote port returns within the dev_loss_tmo value (and matches
+ * according to the target id binding type), the port structure will be
+ * reused. If it is no longer a SCSI target, the target will be torn
+ * down. If it continues to be a SCSI target, then the target will be
+ * unblocked (allowing i/o to be resumed), and a scan will be activated
+ * to ensure that all luns are detected.
+ *
+ * Called from normal process context only - cannot be called from interrupt.
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ **/
+void
+fc_remote_port_delete(struct fc_rport *rport)
+{
+ struct Scsi_Host *shost = rport_to_shost(rport);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ int timeout = rport->dev_loss_tmo;
+ unsigned long flags;
+
+ /*
+ * No need to flush the fc_host work_q's, as all adds are synchronous.
+ *
+ * We do need to reclaim the rport scan work element, so eventually
+ * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
+ * there's still a scan pending.
+ */
+
+ spin_lock_irqsave(shost->host_lock, flags);
+
+ /* If no scsi target id mapping, delete it */
+ if (rport->scsi_target_id == -1) {
+ list_del(&rport->peers);
+ rport->port_state = FC_PORTSTATE_DELETED;
+ fc_queue_work(shost, &rport->rport_delete_work);
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ return;
+ }
+
+ rport->port_state = FC_PORTSTATE_BLOCKED;
+
+ rport->flags |= FC_RPORT_DEVLOSS_PENDING;
+
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ scsi_target_block(&rport->dev);
+
+ /* 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) && (i->f->terminate_rport_io))
+ 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.
+ *
+ * The LLDD calls this routine to notify the transport that the roles
+ * on a remote port may have changed. The largest effect of this is
+ * if a port now becomes a FCP Target, it must be allocated a
+ * scsi target id. If the port is no longer a FCP target, any
+ * scsi target id value assigned to it will persist in case the
+ * role changes back to include FCP Target. No changes in the scsi
+ * midlayer will be invoked if the role changes (in the expectation
+ * that the role will be resumed. If it doesn't normal error processing
+ * will take place).
+ *
+ * Should not be called from interrupt context.
+ *
+ * Notes:
+ * This routine assumes no locks are held on entry.
+ **/
+void
+fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
+{
+ struct Scsi_Host *shost = rport_to_shost(rport);
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+ unsigned long flags;
+ int create = 0;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+ if (roles & FC_RPORT_ROLE_FCP_TARGET) {
+ if (rport->scsi_target_id == -1) {
+ rport->scsi_target_id = fc_host->next_target_id++;
+ create = 1;
+ } else if (!(rport->roles & FC_RPORT_ROLE_FCP_TARGET))
+ create = 1;
+ }
+
+ rport->roles = roles;
+
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ if (create) {
+ /*
+ * There may have been a delete timer running on the
+ * port. Ensure that it is cancelled as we now know
+ * the port is an FCP Target.
+ * Note: we know the rport is exists and in an online
+ * state as the LLDD would not have had an rport
+ * reference to pass us.
+ *
+ * Take no action on the del_timer failure as the state
+ * machine state change will validate the
+ * transaction.
+ */
+ if (!cancel_delayed_work(&rport->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_DEVLOSS_PENDING;
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ /* ensure any stgt delete functions are done */
+ fc_flush_work(shost);
+
+ /* initiate a scan of the target */
+ spin_lock_irqsave(shost->host_lock, flags);
+ rport->flags |= FC_RPORT_SCAN_PENDING;
+ scsi_queue_work(shost, &rport->scan_work);
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ scsi_target_unblock(&rport->dev);
+ }
+}
+EXPORT_SYMBOL(fc_remote_port_rolechg);
+
+/**
+ * fc_timeout_deleted_rport - Timeout handler for a deleted remote port that
+ * was a SCSI target (thus was blocked), and failed
+ * to return in the alloted time.
+ *
+ * @work: rport target that failed to reappear in the alloted time.
+ **/
+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_host_attrs *fc_host = shost_to_fc_host(shost);
+ unsigned long flags;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+
+ rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
+
+ /*
+ * If the port is ONLINE, then it came back. Validate it's still an
+ * FCP target. If not, tear down the scsi_target on it.
+ */
+ if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
+ !(rport->roles & FC_RPORT_ROLE_FCP_TARGET)) {
+ dev_printk(KERN_ERR, &rport->dev,
+ "blocked FC remote port time out: no longer"
+ " a FCP target, removing starget\n");
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ scsi_target_unblock(&rport->dev);
+ fc_queue_work(shost, &rport->stgt_delete_work);
+ return;
+ }
+
+ if (rport->port_state != FC_PORTSTATE_BLOCKED) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ dev_printk(KERN_ERR, &rport->dev,
+ "blocked FC remote port time out: leaving target alone\n");
+ return;
+ }
+
+ if (fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) {
+ list_del(&rport->peers);
+ rport->port_state = FC_PORTSTATE_DELETED;
+ dev_printk(KERN_ERR, &rport->dev,
+ "blocked FC remote port time out: removing target\n");
+ fc_queue_work(shost, &rport->rport_delete_work);
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ return;
+ }
+
+ dev_printk(KERN_ERR, &rport->dev,
+ "blocked FC remote port time out: removing target and "
+ "saving binding\n");
+
+ list_move_tail(&rport->peers, &fc_host->rport_bindings);
+
+ /*
+ * Note: We do not remove or clear the hostdata area. This allows
+ * host-specific target data to persist along with the
+ * scsi_target_id. It's up to the host to manage it's hostdata area.
+ */
+
+ /*
+ * Reinitialize port attributes that may change if the port comes back.
+ */
+ rport->maxframe_size = -1;
+ rport->supported_classes = FC_COS_UNSPECIFIED;
+ rport->roles = FC_RPORT_ROLE_UNKNOWN;
+ rport->port_state = FC_PORTSTATE_NOTPRESENT;
+
+ /* remove the identifiers that aren't used in the consisting binding */
+ switch (fc_host->tgtid_bind_type) {
+ case FC_TGTID_BIND_BY_WWPN:
+ rport->node_name = -1;
+ rport->port_id = -1;
+ break;
+ case FC_TGTID_BIND_BY_WWNN:
+ rport->port_name = -1;
+ rport->port_id = -1;
+ break;
+ case FC_TGTID_BIND_BY_ID:
+ rport->node_name = -1;
+ rport->port_name = -1;
+ break;
+ case FC_TGTID_BIND_NONE: /* to keep compiler happy */
+ break;
+ }
+
+ /*
+ * As this only occurs if the remote port (scsi target)
+ * went away and didn't come back - we'll remove
+ * all attached scsi devices.
+ */
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ scsi_target_unblock(&rport->dev);
+ fc_queue_work(shost, &rport->stgt_delete_work);
+}
+
+/**
+ * fc_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);
+ struct Scsi_Host *shost = rport_to_shost(rport);
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+
+ if (rport->port_state != FC_PORTSTATE_BLOCKED)
+ return;
+
+ i->f->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);
+ unsigned long flags;
+
+ if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
+ (rport->roles & FC_RPORT_ROLE_FCP_TARGET)) {
+ scsi_scan_target(&rport->dev, rport->channel,
+ rport->scsi_target_id, SCAN_WILD_CARD, 1);
+ }
+
+ spin_lock_irqsave(shost->host_lock, flags);
+ rport->flags &= ~FC_RPORT_SCAN_PENDING;
+ spin_unlock_irqrestore(shost->host_lock, flags);
}
-EXPORT_SYMBOL(fc_release_transport);
MODULE_AUTHOR("Martin Hicks");
git://git.onelab.eu / linux-2.6.git / blobdiff