* 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"
-#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 int fc_queue_work(struct Scsi_Host *, struct work_struct *);
/*
* Redefine so that we can have same named attributes in the
int i; \
char *name = NULL; \
\
- for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \
+ for (i = 0; i < ARRAY_SIZE(table); i++) { \
if (table[i].value == table_key) { \
name = table[i].name; \
break; \
{ \
int i; \
\
- for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \
+ for (i = 0; i < ARRAY_SIZE(table); i++) { \
if (strncmp(table_key, table[i].name, \
table[i].matchlen) == 0) { \
*value = table[i].value; \
#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 struct {
+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, "fcportid (FC Address)", 8 },
+ { 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)
ssize_t len = 0; \
int i; \
\
- for (i = 0; i < sizeof(table)/sizeof(table[0]); 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); \
}
-/* Convert fc_cos bit values to ascii string name */
-static struct {
+/* Convert FC_COS bit values to ascii string name */
+static const struct {
u32 value;
char *name;
} fc_cos_names[] = {
fc_bitfield_name_search(cos, fc_cos_names)
-/* Convert fc_port_speed bit values to ascii string name */
-static struct {
+/* Convert FC_PORTSPEED bit values to ascii string name */
+static const struct {
u32 value;
char *name;
} fc_port_speed_names[] = {
}
+/* Convert FC_RPORT_ROLE bit values to ascii string name */
+static const struct {
+ u32 value;
+ char *name;
+} fc_remote_port_role_names[] = {
+ { FC_RPORT_ROLE_FCP_TARGET, "FCP Target" },
+ { FC_RPORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
+ { FC_RPORT_ROLE_IP_PORT, "IP Port" },
+};
+fc_bitfield_name_search(remote_port_roles, fc_remote_port_role_names)
+
+/*
+ * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
+ */
+#define FC_WELLKNOWN_PORTID_MASK 0xfffff0
+#define FC_WELLKNOWN_ROLE_MASK 0x00000f
+#define FC_FPORT_PORTID 0x00000e
+#define FC_FABCTLR_PORTID 0x00000d
+#define FC_DIRSRVR_PORTID 0x00000c
+#define FC_TIMESRVR_PORTID 0x00000b
+#define FC_MGMTSRVR_PORTID 0x00000a
+
-static void fc_timeout_blocked_host(void *data);
-static void fc_timeout_blocked_tgt(void *data);
+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_STARGET_NUM_ATTRS 4 /* increase this if you add attributes */
-#define FC_STARGET_OTHER_ATTRS 0 /* increase this if you add "always on"
- * attributes */
-#define FC_HOST_NUM_ATTRS 15
+/*
+ * 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 */
+
+ /*
+ * 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];
- /* The array of null terminated pointers to attributes
- * needed by scsi_sysfs.c */
- struct class_device_attribute *starget_attrs[
- FC_STARGET_NUM_ATTRS + FC_STARGET_OTHER_ATTRS + 1];
+ FC_STARGET_NUM_ATTRS];
+ struct class_device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
struct class_device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
struct class_device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
+
+ struct transport_container rport_attr_cont;
+ struct class_device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
+ struct class_device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
};
#define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
-static int fc_add_target(struct device *dev)
+static int fc_target_setup(struct transport_container *tc, struct device *dev,
+ struct class_device *cdev)
{
struct scsi_target *starget = to_scsi_target(dev);
- /*
- * Set default values easily detected by the midlayer as
- * failure cases. The scsi lldd is responsible for initializing
- * all transport attributes to valid values per target.
+ 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.
*/
- fc_starget_node_name(starget) = -1;
- fc_starget_port_name(starget) = -1;
- fc_starget_port_id(starget) = -1;
- fc_starget_dev_loss_tmo(starget) = -1;
- INIT_WORK(&fc_starget_dev_loss_work(starget),
- fc_timeout_blocked_tgt, starget);
- return 0;
-}
+ 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;
+ }
-static int fc_remove_target(struct device *dev)
-{
- struct scsi_target *starget = to_scsi_target(dev);
- /* Stop the target timer */
- if (cancel_delayed_work(&fc_starget_dev_loss_work(starget)))
- flush_scheduled_work();
return 0;
}
static DECLARE_TRANSPORT_CLASS(fc_transport_class,
"fc_transport",
- fc_add_target,
- fc_remove_target,
+ fc_target_setup,
+ NULL,
NULL);
-static int fc_add_host(struct device *dev)
+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(shost) = -1;
- fc_host_port_name(shost) = -1;
- fc_host_supported_classes(shost) = FC_COS_UNSPECIFIED;
- memset(fc_host_supported_fc4s(shost), 0,
- sizeof(fc_host_supported_fc4s(shost)));
- memset(fc_host_symbolic_name(shost), 0,
- sizeof(fc_host_symbolic_name(shost)));
- fc_host_supported_speeds(shost) = FC_PORTSPEED_UNKNOWN;
- fc_host_maxframe_size(shost) = -1;
- memset(fc_host_hardware_version(shost), 0,
- sizeof(fc_host_hardware_version(shost)));
- memset(fc_host_firmware_version(shost), 0,
- sizeof(fc_host_firmware_version(shost)));
- memset(fc_host_serial_number(shost), 0,
- sizeof(fc_host_serial_number(shost)));
- memset(fc_host_opt_rom_version(shost), 0,
- sizeof(fc_host_opt_rom_version(shost)));
- memset(fc_host_driver_version(shost), 0,
- sizeof(fc_host_driver_version(shost)));
-
- fc_host_port_id(shost) = -1;
- fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
- fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
- memset(fc_host_active_fc4s(shost), 0,
- sizeof(fc_host_active_fc4s(shost)));
- fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
- fc_host_fabric_name(shost) = -1;
- fc_host_link_down_tmo(shost) = -1;
-
- fc_host_tgtid_bind_type(shost) = FC_TGTID_BIND_BY_WWPN;
-
- INIT_WORK(&fc_host_link_down_work(shost),
- fc_timeout_blocked_host, shost);
- return 0;
-}
+ 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;
+ }
-static int fc_remove_host(struct device *dev)
-{
- struct Scsi_Host *shost = dev_to_shost(dev);
- /* Stop the host timer */
- if (cancel_delayed_work(&fc_host_link_down_work(shost)))
- flush_scheduled_work();
return 0;
}
static DECLARE_TRANSPORT_CLASS(fc_host_class,
"fc_host",
- fc_add_host,
- fc_remove_host,
+ 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)
{
- int error = transport_class_register(&fc_host_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)
{
transport_class_unregister(&fc_transport_class);
+ transport_class_unregister(&fc_rport_class);
transport_class_unregister(&fc_host_class);
}
/*
- * Remote Port (Target) Attribute Management
+ * FC Remote Port Attribute Management
*/
-#define fc_starget_show_function(field, format_string, cast) \
+#define fc_rport_show_function(field, format_string, sz, cast) \
static ssize_t \
-show_fc_starget_##field (struct class_device *cdev, char *buf) \
+show_fc_rport_##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_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_starget_##field) \
- i->f->get_starget_##field(starget); \
- return snprintf(buf, 20, format_string, \
- cast fc_starget_##field(starget)); \
+ 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_starget_store_function(field, format_string) \
+#define fc_rport_store_function(field) \
static ssize_t \
-store_fc_starget_##field(struct class_device *cdev, const char *buf, \
+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 */
+
+fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
+fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
+fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
+
+static ssize_t
+show_fc_rport_roles (struct class_device *cdev, char *buf)
+{
+ struct fc_rport *rport = transport_class_to_rport(cdev);
+
+ /* identify any roles that are port_id specific */
+ if ((rport->port_id != -1) &&
+ (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
+ FC_WELLKNOWN_PORTID_MASK) {
+ switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
+ case FC_FPORT_PORTID:
+ return snprintf(buf, 30, "Fabric Port\n");
+ case FC_FABCTLR_PORTID:
+ return snprintf(buf, 30, "Fabric Controller\n");
+ case FC_DIRSRVR_PORTID:
+ return snprintf(buf, 30, "Directory Server\n");
+ case FC_TIMESRVR_PORTID:
+ return snprintf(buf, 30, "Time Server\n");
+ case FC_MGMTSRVR_PORTID:
+ return snprintf(buf, 30, "Management Server\n");
+ default:
+ return snprintf(buf, 30, "Unknown Fabric Entity\n");
+ }
+ } else {
+ if (rport->roles == FC_RPORT_ROLE_UNKNOWN)
+ return snprintf(buf, 20, "unknown\n");
+ return get_fc_remote_port_roles_names(rport->roles, buf);
+ }
+}
+static FC_CLASS_DEVICE_ATTR(rport, roles, S_IRUGO,
+ show_fc_rport_roles, NULL);
+
+fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
+fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
+
+/*
+ * 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 ssize_t
+store_fc_rport_fast_io_fail_tmo(struct class_device *cdev, const char *buf,
+ size_t count)
+{
+ 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);
+
+
+/*
+ * 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); \
- \
- val = simple_strtoul(buf, NULL, 0); \
- i->f->set_starget_##field(starget, val); \
- return count; \
+ 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) \
- fc_starget_show_function(field, format_string, ) \
+#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, cast) \
- fc_starget_show_function(field, format_string, (cast)) \
+#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 fc_starget_rw_attr(field, format_string) \
- fc_starget_show_function(field, format_string, ) \
- fc_starget_store_function(field, format_string) \
-static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO | S_IWUSR, \
- show_fc_starget_##field, \
- store_fc_starget_##field)
-
#define SETUP_STARGET_ATTRIBUTE_RD(field) \
i->private_starget_attrs[count] = class_device_attr_starget_##field; \
i->private_starget_attrs[count].attr.mode = S_IRUGO; \
if (i->f->show_starget_##field) \
count++
-/* The FC Tranport Remote Port (Target) Attributes: */
-fc_starget_rd_attr_cast(node_name, "0x%llx\n", unsigned long long);
-fc_starget_rd_attr_cast(port_name, "0x%llx\n", unsigned long long);
-fc_starget_rd_attr(port_id, "0x%06x\n");
-fc_starget_rw_attr(dev_loss_tmo, "%d\n");
-
+/* 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);
/*
return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
}
-#define fc_host_store_function(field, format_string) \
+#define fc_host_store_function(field) \
static ssize_t \
store_fc_host_##field(struct class_device *cdev, const char *buf, \
size_t count) \
int val; \
struct Scsi_Host *shost = transport_class_to_shost(cdev); \
struct fc_internal *i = to_fc_internal(shost->transportt); \
+ char *cp; \
\
- val = simple_strtoul(buf, NULL, 0); \
+ 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 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, \
#define fc_host_rw_attr(field, format_string, sz) \
fc_host_show_function(field, format_string, sz, ) \
- fc_host_store_function(field, format_string) \
+ fc_host_store_function(field) \
static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
show_fc_host_##field, \
store_fc_host_##field)
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++
+ count++; \
+}
/* Fixed Host Attributes */
fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
-fc_private_host_rd_attr(symbolic_name, "%s\n", (FC_SYMBOLIC_NAME_SIZE +1));
+fc_private_host_rd_attr_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(hardware_version, "%s\n", (FC_VERSION_STRING_SIZE +1));
-fc_private_host_rd_attr(firmware_version, "%s\n", (FC_VERSION_STRING_SIZE +1));
fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
-fc_private_host_rd_attr(opt_rom_version, "%s\n", (FC_VERSION_STRING_SIZE +1));
-fc_private_host_rd_attr(driver_version, "%s\n", (FC_VERSION_STRING_SIZE +1));
/* Dynamic Host Attributes */
fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
-fc_host_rw_attr(link_down_tmo, "%d\n", 20);
+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 */
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);
- enum fc_tgtid_binding_type val;
+ 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;
}
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
*/
return 0;
shost = dev_to_shost(dev);
- if (!shost->transportt || shost->transportt->host_attrs.class
+ 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 == cont;
+
+ return &i->t.host_attrs.ac == cont;
}
static int fc_target_match(struct attribute_container *cont,
return 0;
shost = dev_to_shost(dev->parent);
- if (!shost->transportt || shost->transportt->host_attrs.class
+ 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 == cont;
+
+ 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)
{
- struct fc_internal *i = kmalloc(sizeof(struct fc_internal),
+ int count;
+ struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
GFP_KERNEL);
- int count = 0;
if (unlikely(!i))
return NULL;
- memset(i, 0, sizeof(struct fc_internal));
-
- i->t.target_attrs.attrs = &i->starget_attrs[0];
- i->t.target_attrs.class = &fc_transport_class.class;
- i->t.target_attrs.match = fc_target_match;
- attribute_container_register(&i->t.target_attrs);
+ i->t.target_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.attrs = &i->host_attrs[0];
- i->t.host_attrs.class = &fc_host_class.class;
- i->t.host_attrs.match = fc_host_match;
- attribute_container_register(&i->t.host_attrs);
+ i->t.host_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_statistics = &fc_statistics_group;
+ 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 remote port (target) attributes
+ * Setup SCSI Target Attributes.
*/
- SETUP_STARGET_ATTRIBUTE_RD(port_id);
- SETUP_STARGET_ATTRIBUTE_RD(port_name);
+ count = 0;
SETUP_STARGET_ATTRIBUTE_RD(node_name);
- SETUP_STARGET_ATTRIBUTE_RW(dev_loss_tmo);
+ SETUP_STARGET_ATTRIBUTE_RD(port_name);
+ SETUP_STARGET_ATTRIBUTE_RD(port_id);
BUG_ON(count > FC_STARGET_NUM_ATTRS);
- /* Setup the always-on attributes here */
-
i->starget_attrs[count] = NULL;
- /* setup host attributes */
+ /*
+ * Setup SCSI Host Attributes.
+ */
count=0;
SETUP_HOST_ATTRIBUTE_RD(node_name);
SETUP_HOST_ATTRIBUTE_RD(port_name);
+ SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
SETUP_HOST_ATTRIBUTE_RD(supported_classes);
SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
- SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
- SETUP_HOST_ATTRIBUTE_RD(hardware_version);
- SETUP_HOST_ATTRIBUTE_RD(firmware_version);
SETUP_HOST_ATTRIBUTE_RD(serial_number);
- SETUP_HOST_ATTRIBUTE_RD(opt_rom_version);
- SETUP_HOST_ATTRIBUTE_RD(driver_version);
SETUP_HOST_ATTRIBUTE_RD(port_id);
SETUP_HOST_ATTRIBUTE_RD(port_type);
SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
SETUP_HOST_ATTRIBUTE_RD(speed);
SETUP_HOST_ATTRIBUTE_RD(fabric_name);
- SETUP_HOST_ATTRIBUTE_RW(link_down_tmo);
+ 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;
}
{
struct fc_internal *i = to_fc_internal(t);
- attribute_container_unregister(&i->t.target_attrs);
- attribute_container_unregister(&i->t.host_attrs);
+ 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_device_block - called by target functions to block a scsi device
- * @dev: scsi device
- * @data: unused
+ * fc_flush_work - Flush a fc_host's workqueue.
+ * @shost: Pointer to Scsi_Host bound to fc_host.
**/
-static void fc_device_block(struct scsi_device *sdev, void *data)
+static void
+fc_flush_work(struct Scsi_Host *shost)
{
- scsi_internal_device_block(sdev);
+ 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_device_unblock - called by target functions to unblock a scsi device
- * @dev: scsi device
- * @data: unused
+ * 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 void fc_device_unblock(struct scsi_device *sdev, void *data)
+static int
+fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
+ unsigned long delay)
{
- scsi_internal_device_unblock(sdev);
+ 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_timeout_blocked_tgt - Timeout handler for blocked scsi targets
- * that fail to recover in the alloted time.
- * @data: scsi target that failed to reappear in the alloted time.
+ * fc_flush_devloss - Flush a fc_host's devloss workqueue.
+ * @shost: Pointer to Scsi_Host bound to fc_host.
**/
-static void fc_timeout_blocked_tgt(void *data)
+static void
+fc_flush_devloss(struct Scsi_Host *shost)
{
- struct scsi_target *starget = (struct scsi_target *)data;
-
- dev_printk(KERN_ERR, &starget->dev,
- "blocked target time out: target resuming\n");
+ 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;
+ }
- /*
- * set the device going again ... if the scsi lld didn't
- * unblock this device, then IO errors will probably
- * result if the host still isn't ready.
- */
- starget_for_each_device(starget, NULL, fc_device_unblock);
+ flush_workqueue(fc_host_devloss_work_q(shost));
}
+
/**
- * fc_target_block - block a target by temporarily putting all its scsi devices
- * into the SDEV_BLOCK state.
- * @starget: scsi target managed by this fc scsi lldd.
+ * fc_remove_host - called to terminate any fc_transport-related elements
+ * for a scsi host.
+ * @rport: remote port to be unblocked.
*
- * scsi lldd's with a FC transport call this routine to temporarily stop all
- * scsi commands to all devices managed by this scsi target. Called
- * from interrupt or normal process context.
+ * This routine is expected to be called immediately preceeding the
+ * a driver's call to scsi_remove_host().
*
- * Returns zero if successful or error if not
+ * 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:
- * The timeout and timer types are extracted from the fc transport
- * attributes from the caller's target pointer. This routine assumes no
- * locks are held on entry.
+ * Notes:
+ * This routine assumes no locks are held on entry.
**/
-int
-fc_target_block(struct scsi_target *starget)
+void
+fc_remove_host(struct Scsi_Host *shost)
{
- int timeout = fc_starget_dev_loss_tmo(starget);
- struct work_struct *work = &fc_starget_dev_loss_work(starget);
+ 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);
+ }
- if (timeout < 0 || timeout > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
- return -EINVAL;
+ 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);
+ }
- starget_for_each_device(starget, NULL, fc_device_block);
+ /* flush all scan work items */
+ scsi_flush_work(shost);
- /* The scsi lld blocks this target for the timeout period only. */
- schedule_delayed_work(work, timeout * HZ);
+ /* 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);
+ }
- return 0;
+ /* 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_target_block);
+EXPORT_SYMBOL(fc_remove_host);
+
/**
- * fc_target_unblock - unblock a target following a fc_target_block request.
- * @starget: scsi target managed by this fc scsi lldd.
+ * fc_starget_delete - called to delete the scsi decendents of an rport
+ * (target and all sdevs)
*
- * scsi lld's with a FC transport call this routine to restart IO to all
- * devices associated with the caller's scsi target following a fc_target_block
- * request. Called from interrupt or normal process context.
+ * @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.
*
- * Notes:
- * This routine assumes no locks are held on entry.
+ * @work: remote port to be deleted.
**/
-void
-fc_target_unblock(struct scsi_target *starget)
+static void
+fc_rport_final_delete(struct work_struct *work)
{
- /*
- * Stop the target timer first. Take no action on the del_timer
- * failure as the state machine state change will validate the
- * transaction.
+ 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 (cancel_delayed_work(&fc_starget_dev_loss_work(starget)))
- flush_scheduled_work();
+ 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);
+ }
- starget_for_each_device(starget, NULL, fc_device_unblock);
+ 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;
}
-EXPORT_SYMBOL(fc_target_unblock);
/**
- * fc_timeout_blocked_host - Timeout handler for blocked scsi hosts
- * that fail to recover in the alloted time.
- * @data: scsi host that failed to recover its devices in the alloted
- * time.
+ * 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.
**/
-static void fc_timeout_blocked_host(void *data)
+struct fc_rport *
+fc_remote_port_add(struct Scsi_Host *shost, int channel,
+ struct fc_rport_identifiers *ids)
{
- struct Scsi_Host *shost = (struct Scsi_Host *)data;
- struct scsi_device *sdev;
+ 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;
- dev_printk(KERN_ERR, &shost->shost_gendev,
- "blocked host time out: host resuming\n");
+ /* ensure any stgt delete functions are done */
+ fc_flush_work(shost);
- shost_for_each_device(sdev, shost) {
- /*
- * set the device going again ... if the scsi lld didn't
- * unblock this device, then IO errors will probably
- * result if the host still isn't ready.
- */
- scsi_internal_device_unblock(sdev);
+ /*
+ * 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_host_block - block all scsi devices managed by the calling host temporarily
- * by putting each device in the SDEV_BLOCK state.
- * @shost: scsi host pointer that contains all scsi device siblings.
+ * 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).
*
- * scsi lld's with a FC transport call this routine to temporarily stop all
- * scsi commands to all devices managed by this host. Called
- * from interrupt or normal process context.
+ * 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.
*
- * Returns zero if successful or error if not
+ * Called from normal process context only - cannot be called from interrupt.
*
* Notes:
- * The timeout and timer types are extracted from the fc transport
- * attributes from the caller's host pointer. This routine assumes no
- * locks are held on entry.
+ * This routine assumes no locks are held on entry.
**/
-int
-fc_host_block(struct Scsi_Host *shost)
+void
+fc_remote_port_delete(struct fc_rport *rport)
{
- struct scsi_device *sdev;
- int timeout = fc_host_link_down_tmo(shost);
- struct work_struct *work = &fc_host_link_down_work(shost);
+ 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;
- if (timeout < 0 || timeout > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
- return -EINVAL;
+ /*
+ * 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);
- shost_for_each_device(sdev, shost) {
- scsi_internal_device_block(sdev);
+ /* 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;
}
- schedule_delayed_work(work, timeout * HZ);
+ rport->port_state = FC_PORTSTATE_BLOCKED;
- return 0;
+ 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_host_block);
+EXPORT_SYMBOL(fc_remote_port_delete);
/**
- * fc_host_unblock - unblock all devices managed by this host following a
- * fc_host_block request.
- * @shost: scsi host containing all scsi device siblings to unblock.
+ * 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).
*
- * scsi lld's with a FC transport call this routine to restart IO to all scsi
- * devices managed by the specified scsi host following an fc_host_block
- * request. Called from interrupt or normal process context.
+ * Should not be called from interrupt context.
*
- * Notes:
+ * Notes:
* This routine assumes no locks are held on entry.
**/
void
-fc_host_unblock(struct Scsi_Host *shost)
+fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
{
- struct scsi_device *sdev;
+ 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;
+ }
- /*
- * Stop the host timer first. Take no action on the del_timer
- * failure as the state machine state change will validate the
- * transaction.
+ 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 (cancel_delayed_work(&fc_host_link_down_work(shost)))
- flush_scheduled_work();
+ 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;
+ }
- shost_for_each_device(sdev, shost) {
- scsi_internal_device_unblock(sdev);
+ 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);
}
-EXPORT_SYMBOL(fc_host_unblock);
+
+/**
+ * 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);
+}
+
MODULE_AUTHOR("Martin Hicks");
MODULE_DESCRIPTION("FC Transport Attributes");
git://git.onelab.eu / linux-2.6.git / blobdiff