#include <scsi/scsi_host.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_fc.h>
+#include <scsi/scsi_cmnd.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.
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; \
{ 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;
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 {
+static const struct {
u32 value;
char *name;
} fc_cos_names[] = {
/* Convert FC_PORTSPEED bit values to ascii string name */
-static struct {
+static const struct {
u32 value;
char *name;
} fc_port_speed_names[] = {
/* Convert FC_RPORT_ROLE bit values to ascii string name */
-static struct {
+static const struct {
u32 value;
char *name;
} fc_remote_port_role_names[] = {
static void fc_timeout_deleted_rport(void *data);
static void fc_scsi_scan_rport(void *data);
-static void fc_rport_terminate(struct fc_rport *rport);
/*
* Attribute counts pre object type...
*/
#define FC_STARGET_NUM_ATTRS 3
#define FC_RPORT_NUM_ATTRS 9
-#define FC_HOST_NUM_ATTRS 16
+#define FC_HOST_NUM_ATTRS 17
struct fc_internal {
struct scsi_transport_template t;
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_serial_number(shost), 0,
- sizeof(fc_host_serial_number(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_tgtid_bind_type(shost) = FC_TGTID_BIND_BY_WWPN;
-
- INIT_LIST_HEAD(&fc_host_rports(shost));
- INIT_LIST_HEAD(&fc_host_rport_bindings(shost));
- fc_host_next_rport_number(shost) = 0;
- fc_host_next_target_id(shost) = 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));
+ memset(fc_host->symbolic_name, 0,
+ sizeof(fc_host->symbolic_name));
+ 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;
+
+ 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;
}
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); \
struct Scsi_Host *shost = rport_to_shost(rport); \
struct fc_internal *i = to_fc_internal(shost->transportt); \
if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
+ (rport->port_state == FC_PORTSTATE_DELETED) || \
(rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
return -EBUSY; \
val = simple_strtoul(buf, NULL, 0); \
struct Scsi_Host *shost = rport_to_shost(rport);
struct fc_internal *i = to_fc_internal(shost->transportt);
if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
+ (rport->port_state == FC_PORTSTATE_DELETED) ||
(rport->port_state == FC_PORTSTATE_NOTPRESENT))
return -EBUSY;
val = simple_strtoul(buf, NULL, 0);
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(symbolic_name, "%s\n", (FC_SYMBOLIC_NAME_SIZE +1));
fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
while (!list_empty(&fc_host_rport_bindings(shost))) {
get_list_head_entry(rport,
&fc_host_rport_bindings(shost), peers);
- spin_unlock_irqrestore(shost->host_lock, flags);
- fc_rport_terminate(rport);
- spin_lock_irqsave(shost->host_lock, flags);
+ 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_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 struct device *fc_target_parent(struct Scsi_Host *shost,
- int channel, uint id)
+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->channel == channel) &&
- (rport->scsi_target_id == id))
- return &rport->dev;
+ list_for_each_entry(rport, &fc_host_rports(shost), peers) {
+ if (rport->scsi_target_id == -1)
+ continue;
- return NULL;
+ 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),
- GFP_KERNEL);
int count;
+ struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
+ GFP_KERNEL);
if (unlikely(!i))
return NULL;
- memset(i, 0, sizeof(struct fc_internal));
-
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;
/* Transport uses the shost workq for scsi scanning */
i->t.create_work_queue = 1;
- i->t.target_parent = fc_target_parent;
+ i->t.eh_timed_out = fc_timed_out;
+
+ i->t.user_scan = fc_user_scan;
/*
* Setup SCSI Target 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);
}
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:
+ * 0 on success / != 0 for error
+ **/
+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:
+ * 0 on success / != 0 for error
+ **/
+static int
+fc_queue_devloss_work(struct Scsi_Host *shost, struct work_struct *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
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(shost), peers)
- fc_rport_terminate(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(shost), peers)
- fc_rport_terminate(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_rport_tgt_remove - Removes the scsi target on the remote port
- * @rport: The remote port to be operated on
- */
+
+/**
+ * fc_starget_delete - called to delete the scsi decendents of an rport
+ * (target and all sdevs)
+ *
+ * @data: remote port to be operated on.
+ **/
static void
-fc_rport_tgt_remove(struct fc_rport *rport)
+fc_starget_delete(void *data)
{
+ struct fc_rport *rport = (struct fc_rport *)data;
struct Scsi_Host *shost = rport_to_shost(rport);
+ unsigned long flags;
scsi_target_unblock(&rport->dev);
- /* Stop anything on the workq */
- if (!cancel_delayed_work(&rport->dev_loss_work))
- flush_scheduled_work();
- scsi_flush_work(shost);
+ 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->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.
+ *
+ * @data: remote port to be deleted.
+ **/
+static void
+fc_rport_final_delete(void *data)
+{
+ struct fc_rport *rport = (struct fc_rport *)data;
+ struct device *dev = &rport->dev;
+ struct Scsi_Host *shost = rport_to_shost(rport);
+
+ /* Delete SCSI target and sdevs */
+ if (rport->scsi_target_id != -1)
+ fc_starget_delete(data);
+
+ /*
+ * 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);
+
+ transport_remove_device(dev);
+ device_del(dev);
+ transport_destroy_device(dev);
+ put_device(&shost->shost_gendev);
+}
+
+
/**
* fc_rport_create - allocates and creates a remote FC port.
* @shost: scsi host the remote port is connected to.
fc_rport_create(struct Scsi_Host *shost, int channel,
struct fc_rport_identifiers *ids)
{
- struct fc_host_attrs *fc_host =
- (struct fc_host_attrs *)shost->shost_data;
+ 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;
size_t size;
size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
- rport = kmalloc(size, GFP_KERNEL);
+ rport = kzalloc(size, GFP_KERNEL);
if (unlikely(!rport)) {
printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__);
return NULL;
}
- memset(rport, 0, size);
rport->maxframe_size = -1;
rport->supported_classes = FC_COS_UNSPECIFIED;
INIT_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport, rport);
INIT_WORK(&rport->scan_work, fc_scsi_scan_rport, rport);
+ INIT_WORK(&rport->stgt_delete_work, fc_starget_delete, rport);
+ INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete, rport);
spin_lock_irqsave(shost->host_lock, flags);
rport->scsi_target_id = fc_host->next_target_id++;
else
rport->scsi_target_id = -1;
- list_add_tail(&rport->peers, &fc_host_rports(shost));
+ list_add_tail(&rport->peers, &fc_host->rports);
get_device(&shost->shost_gendev);
spin_unlock_irqrestore(shost->host_lock, flags);
transport_add_device(dev);
transport_configure_device(dev);
- if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
+ 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;
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
*/
spin_lock_irqsave(shost->host_lock, flags);
- list_for_each_entry(rport, &fc_host_rports(shost), peers) {
+ 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(shost)) {
+ switch (fc_host->tgtid_bind_type) {
case FC_TGTID_BIND_BY_WWPN:
case FC_TGTID_BIND_NONE:
if (rport->port_name == ids->port_name)
* transaction.
*/
if (!cancel_delayed_work(work))
- flush_scheduled_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);
+
return rport;
}
}
}
/* Search the bindings array */
- if (likely((ids->roles & FC_RPORT_ROLE_FCP_TARGET) &&
- (fc_host_tgtid_bind_type(shost) != FC_TGTID_BIND_NONE))) {
+ 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(shost),
+ list_for_each_entry(rport, &fc_host->rport_bindings,
peers) {
if (rport->channel != channel)
continue;
- switch (fc_host_tgtid_bind_type(shost)) {
+ switch (fc_host->tgtid_bind_type) {
case FC_TGTID_BIND_BY_WWPN:
if (rport->port_name == ids->port_name)
match = 1;
}
if (match) {
- list_move_tail(&rport->peers,
- &fc_host_rports(shost));
+ list_move_tail(&rport->peers, &fc_host->rports);
break;
}
}
rport->roles = ids->roles;
rport->port_state = FC_PORTSTATE_ONLINE;
- spin_unlock_irqrestore(shost->host_lock, flags);
-
if (fci->f->dd_fcrport_size)
memset(rport->dd_data, 0,
fci->f->dd_fcrport_size);
- if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
+ 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);
return rport;
}
}
EXPORT_SYMBOL(fc_remote_port_add);
-/*
- * fc_rport_terminate - this routine tears down and deallocates a remote port.
- * @rport: The remote port to be terminated
- *
- * Notes:
- * This routine assumes no locks are held on entry.
- */
-static void
-fc_rport_terminate(struct fc_rport *rport)
-{
- struct Scsi_Host *shost = rport_to_shost(rport);
- struct device *dev = &rport->dev;
- unsigned long flags;
-
- fc_rport_tgt_remove(rport);
-
- transport_remove_device(dev);
- device_del(dev);
- transport_destroy_device(dev);
- spin_lock_irqsave(shost->host_lock, flags);
- list_del(&rport->peers);
- spin_unlock_irqrestore(shost->host_lock, flags);
- put_device(&shost->shost_gendev);
-}
/**
* fc_remote_port_delete - notifies the fc transport that a remote
void
fc_remote_port_delete(struct fc_rport *rport)
{
+ struct Scsi_Host *shost = rport_to_shost(rport);
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) {
- fc_rport_terminate(rport);
+ 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);
/* cap the length the devices can be blocked until they are deleted */
- schedule_delayed_work(&rport->dev_loss_work, timeout * HZ);
-
- rport->port_state = FC_PORTSTATE_BLOCKED;
+ fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
}
EXPORT_SYMBOL(fc_remote_port_delete);
fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
{
struct Scsi_Host *shost = rport_to_shost(rport);
- struct fc_host_attrs *fc_host =
- (struct fc_host_attrs *)shost->shost_data;
+ struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
unsigned long flags;
int create = 0;
} else if (!(rport->roles & FC_RPORT_ROLE_FCP_TARGET))
create = 1;
}
- spin_unlock_irqrestore(shost->host_lock, flags);
rport->roles = roles;
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
if (create) {
/*
* There may have been a delete timer running on the
* transaction.
*/
if (!cancel_delayed_work(&rport->dev_loss_work))
- flush_scheduled_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);
}
}
EXPORT_SYMBOL(fc_remote_port_rolechg);
{
struct fc_rport *rport = (struct fc_rport *)data;
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, but was no longer an
- * FCP target. Thus we need to tear down the scsi_target on it.
+ * 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) {
- spin_unlock_irqrestore(shost->host_lock, flags);
-
+ 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: removing target\n");
-
- fc_rport_tgt_remove(rport);
-
+ "blocked FC remote port time out: no longer"
+ " a FCP target, removing starget\n");
+ fc_queue_work(shost, &rport->stgt_delete_work);
+ spin_unlock_irqrestore(shost->host_lock, flags);
return;
}
return;
}
- if (fc_host_tgtid_bind_type(shost) == FC_TGTID_BIND_NONE) {
- spin_unlock_irqrestore(shost->host_lock, flags);
+ 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_rport_terminate(rport);
+ fc_queue_work(shost, &rport->rport_delete_work);
+ spin_unlock_irqrestore(shost->host_lock, flags);
return;
}
"blocked FC remote port time out: removing target and "
"saving binding\n");
- list_move_tail(&rport->peers, &fc_host_rport_bindings(shost));
+ list_move_tail(&rport->peers, &fc_host->rport_bindings);
/*
* Note: We do not remove or clear the hostdata area. This allows
rport->port_state = FC_PORTSTATE_NOTPRESENT;
/* remove the identifiers that aren't used in the consisting binding */
- switch (fc_host_tgtid_bind_type(shost)) {
+ switch (fc_host->tgtid_bind_type) {
case FC_TGTID_BIND_BY_WWPN:
rport->node_name = -1;
rport->port_id = -1;
break;
}
- spin_unlock_irqrestore(shost->host_lock, flags);
-
/*
* As this only occurs if the remote port (scsi target)
* went away and didn't come back - we'll remove
* all attached scsi devices.
*/
- fc_rport_tgt_remove(rport);
+ fc_queue_work(shost, &rport->stgt_delete_work);
+
+ spin_unlock_irqrestore(shost->host_lock, flags);
}
/**
fc_scsi_scan_rport(void *data)
{
struct fc_rport *rport = (struct fc_rport *)data;
+ struct Scsi_Host *shost = rport_to_shost(rport);
+ unsigned long flags;
- scsi_target_unblock(&rport->dev);
- scsi_scan_target(&rport->dev, rport->channel, rport->scsi_target_id,
- SCAN_WILD_CARD, 1);
+ if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
+ (rport->roles & FC_RPORT_ROLE_FCP_TARGET)) {
+ scsi_target_unblock(&rport->dev);
+ 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);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff