* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <linux/module.h>
-#include <linux/mempool.h>
#include <linux/mutex.h>
#include <net/tcp.h>
#include <scsi/scsi.h>
#include <scsi/scsi_transport_iscsi.h>
#include <scsi/iscsi_if.h>
-#define ISCSI_SESSION_ATTRS 11
-#define ISCSI_CONN_ATTRS 10
-#define ISCSI_HOST_ATTRS 0
+#define ISCSI_SESSION_ATTRS 19
+#define ISCSI_CONN_ATTRS 13
+#define ISCSI_HOST_ATTRS 4
+#define ISCSI_TRANSPORT_VERSION "2.0-869"
struct iscsi_internal {
+ int daemon_pid;
struct scsi_transport_template t;
struct iscsi_transport *iscsi_transport;
struct list_head list;
- struct class_device cdev;
+ struct device dev;
- struct class_device_attribute *host_attrs[ISCSI_HOST_ATTRS + 1];
+ struct device_attribute *host_attrs[ISCSI_HOST_ATTRS + 1];
struct transport_container conn_cont;
- struct class_device_attribute *conn_attrs[ISCSI_CONN_ATTRS + 1];
+ struct device_attribute *conn_attrs[ISCSI_CONN_ATTRS + 1];
struct transport_container session_cont;
- struct class_device_attribute *session_attrs[ISCSI_SESSION_ATTRS + 1];
+ struct device_attribute *session_attrs[ISCSI_SESSION_ATTRS + 1];
};
-static int iscsi_session_nr; /* sysfs session id for next new session */
+static atomic_t iscsi_session_nr; /* sysfs session id for next new session */
+static struct workqueue_struct *iscsi_eh_timer_workq;
/*
* list of registered transports and lock that must
#define to_iscsi_internal(tmpl) \
container_of(tmpl, struct iscsi_internal, t)
-#define cdev_to_iscsi_internal(_cdev) \
- container_of(_cdev, struct iscsi_internal, cdev)
+#define dev_to_iscsi_internal(_dev) \
+ container_of(_dev, struct iscsi_internal, dev)
-static void iscsi_transport_release(struct class_device *cdev)
+static void iscsi_transport_release(struct device *dev)
{
- struct iscsi_internal *priv = cdev_to_iscsi_internal(cdev);
+ struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
kfree(priv);
}
*/
static struct class iscsi_transport_class = {
.name = "iscsi_transport",
- .release = iscsi_transport_release,
+ .dev_release = iscsi_transport_release,
};
static ssize_t
-show_transport_handle(struct class_device *cdev, char *buf)
+show_transport_handle(struct device *dev, struct device_attribute *attr,
+ char *buf)
{
- struct iscsi_internal *priv = cdev_to_iscsi_internal(cdev);
+ struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport));
}
-static CLASS_DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
+static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
#define show_transport_attr(name, format) \
static ssize_t \
-show_transport_##name(struct class_device *cdev, char *buf) \
+show_transport_##name(struct device *dev, \
+ struct device_attribute *attr,char *buf) \
{ \
- struct iscsi_internal *priv = cdev_to_iscsi_internal(cdev); \
+ struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \
return sprintf(buf, format"\n", priv->iscsi_transport->name); \
} \
-static CLASS_DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
+static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
show_transport_attr(caps, "0x%x");
show_transport_attr(max_lun, "%d");
-show_transport_attr(max_conn, "%d");
-show_transport_attr(max_cmd_len, "%d");
static struct attribute *iscsi_transport_attrs[] = {
- &class_device_attr_handle.attr,
- &class_device_attr_caps.attr,
- &class_device_attr_max_lun.attr,
- &class_device_attr_max_conn.attr,
- &class_device_attr_max_cmd_len.attr,
+ &dev_attr_handle.attr,
+ &dev_attr_caps.attr,
+ &dev_attr_max_lun.attr,
NULL,
};
};
static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
- struct class_device *cdev)
+ struct device *cdev)
{
struct Scsi_Host *shost = dev_to_shost(dev);
- struct iscsi_host *ihost = shost->shost_data;
+ struct iscsi_cls_host *ihost = shost->shost_data;
memset(ihost, 0, sizeof(*ihost));
INIT_LIST_HEAD(&ihost->sessions);
mutex_init(&ihost->mutex);
+ atomic_set(&ihost->nr_scans, 0);
+
+ snprintf(ihost->scan_workq_name, KOBJ_NAME_LEN, "iscsi_scan_%d",
+ shost->host_no);
+ ihost->scan_workq = create_singlethread_workqueue(
+ ihost->scan_workq_name);
+ if (!ihost->scan_workq)
+ return -ENOMEM;
+ return 0;
+}
+
+static int iscsi_remove_host(struct transport_container *tc, struct device *dev,
+ struct device *cdev)
+{
+ struct Scsi_Host *shost = dev_to_shost(dev);
+ struct iscsi_cls_host *ihost = shost->shost_data;
+
+ destroy_workqueue(ihost->scan_workq);
return 0;
}
static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
"iscsi_host",
iscsi_setup_host,
- NULL,
+ iscsi_remove_host,
NULL);
static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
NULL);
static struct sock *nls;
-static int daemon_pid;
static DEFINE_MUTEX(rx_queue_mutex);
-struct mempool_zone {
- mempool_t *pool;
- atomic_t allocated;
- int size;
- int hiwat;
- struct list_head freequeue;
- spinlock_t freelock;
-};
-
-static struct mempool_zone *z_reply;
-
-/*
- * Z_MAX_* - actual mempool size allocated at the mempool_zone_init() time
- * Z_HIWAT_* - zone's high watermark when if_error bit will be set to -ENOMEM
- * so daemon will notice OOM on NETLINK tranposrt level and will
- * be able to predict or change operational behavior
- */
-#define Z_MAX_REPLY 8
-#define Z_HIWAT_REPLY 6
-#define Z_MAX_PDU 8
-#define Z_HIWAT_PDU 6
-#define Z_MAX_ERROR 16
-#define Z_HIWAT_ERROR 12
-
static LIST_HEAD(sesslist);
static DEFINE_SPINLOCK(sesslock);
static LIST_HEAD(connlist);
* The following functions can be used by LLDs that allocate
* their own scsi_hosts or by software iscsi LLDs
*/
+static struct {
+ int value;
+ char *name;
+} iscsi_session_state_names[] = {
+ { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" },
+ { ISCSI_SESSION_FAILED, "FAILED" },
+ { ISCSI_SESSION_FREE, "FREE" },
+};
+
+static const char *iscsi_session_state_name(int state)
+{
+ int i;
+ char *name = NULL;
+
+ for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {
+ if (iscsi_session_state_names[i].value == state) {
+ name = iscsi_session_state_names[i].name;
+ break;
+ }
+ }
+ return name;
+}
+
+int iscsi_session_chkready(struct iscsi_cls_session *session)
+{
+ unsigned long flags;
+ int err;
+
+ spin_lock_irqsave(&session->lock, flags);
+ switch (session->state) {
+ case ISCSI_SESSION_LOGGED_IN:
+ err = 0;
+ break;
+ case ISCSI_SESSION_FAILED:
+ err = DID_IMM_RETRY << 16;
+ break;
+ case ISCSI_SESSION_FREE:
+ err = DID_NO_CONNECT << 16;
+ break;
+ default:
+ err = DID_NO_CONNECT << 16;
+ break;
+ }
+ spin_unlock_irqrestore(&session->lock, flags);
+ return err;
+}
+EXPORT_SYMBOL_GPL(iscsi_session_chkready);
+
static void iscsi_session_release(struct device *dev)
{
struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
- struct iscsi_transport *transport = session->transport;
struct Scsi_Host *shost;
shost = iscsi_session_to_shost(session);
scsi_host_put(shost);
- kfree(session->targetname);
kfree(session);
- module_put(transport->owner);
}
static int iscsi_is_session_dev(const struct device *dev)
return dev->release == iscsi_session_release;
}
+/**
+ * iscsi_scan_finished - helper to report when running scans are done
+ * @shost: scsi host
+ * @time: scan run time
+ *
+ * This function can be used by drives like qla4xxx to report to the scsi
+ * layer when the scans it kicked off at module load time are done.
+ */
+int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
+{
+ struct iscsi_cls_host *ihost = shost->shost_data;
+ /*
+ * qla4xxx will have kicked off some session unblocks before calling
+ * scsi_scan_host, so just wait for them to complete.
+ */
+ return !atomic_read(&ihost->nr_scans);
+}
+EXPORT_SYMBOL_GPL(iscsi_scan_finished);
+
static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
uint id, uint lun)
{
- struct iscsi_host *ihost = shost->shost_data;
+ struct iscsi_cls_host *ihost = shost->shost_data;
struct iscsi_cls_session *session;
mutex_lock(&ihost->mutex);
list_for_each_entry(session, &ihost->sessions, host_list) {
- if ((channel == SCAN_WILD_CARD ||
- channel == session->channel) &&
+ if ((channel == SCAN_WILD_CARD || channel == 0) &&
(id == SCAN_WILD_CARD || id == session->target_id))
- scsi_scan_target(&session->dev, session->channel,
+ scsi_scan_target(&session->dev, 0,
session->target_id, lun, 1);
}
mutex_unlock(&ihost->mutex);
return 0;
}
-static void session_recovery_timedout(void *data)
+static void iscsi_scan_session(struct work_struct *work)
+{
+ struct iscsi_cls_session *session =
+ container_of(work, struct iscsi_cls_session, scan_work);
+ struct Scsi_Host *shost = iscsi_session_to_shost(session);
+ struct iscsi_cls_host *ihost = shost->shost_data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&session->lock, flags);
+ if (session->state != ISCSI_SESSION_LOGGED_IN) {
+ spin_unlock_irqrestore(&session->lock, flags);
+ goto done;
+ }
+ spin_unlock_irqrestore(&session->lock, flags);
+
+ scsi_scan_target(&session->dev, 0, session->target_id,
+ SCAN_WILD_CARD, 1);
+done:
+ atomic_dec(&ihost->nr_scans);
+}
+
+static void session_recovery_timedout(struct work_struct *work)
{
- struct iscsi_cls_session *session = data;
+ struct iscsi_cls_session *session =
+ container_of(work, struct iscsi_cls_session,
+ recovery_work.work);
+ unsigned long flags;
- dev_printk(KERN_INFO, &session->dev, "iscsi: session recovery timed "
- "out after %d secs\n", session->recovery_tmo);
+ iscsi_cls_session_printk(KERN_INFO, session,
+ "session recovery timed out after %d secs\n",
+ session->recovery_tmo);
+
+ spin_lock_irqsave(&session->lock, flags);
+ switch (session->state) {
+ case ISCSI_SESSION_FAILED:
+ session->state = ISCSI_SESSION_FREE;
+ break;
+ case ISCSI_SESSION_LOGGED_IN:
+ case ISCSI_SESSION_FREE:
+ /* we raced with the unblock's flush */
+ spin_unlock_irqrestore(&session->lock, flags);
+ return;
+ }
+ spin_unlock_irqrestore(&session->lock, flags);
if (session->transport->session_recovery_timedout)
session->transport->session_recovery_timedout(session);
scsi_target_unblock(&session->dev);
}
-void iscsi_unblock_session(struct iscsi_cls_session *session)
+static void __iscsi_unblock_session(struct work_struct *work)
{
- if (!cancel_delayed_work(&session->recovery_work))
- flush_scheduled_work();
+ struct iscsi_cls_session *session =
+ container_of(work, struct iscsi_cls_session,
+ unblock_work);
+ struct Scsi_Host *shost = iscsi_session_to_shost(session);
+ struct iscsi_cls_host *ihost = shost->shost_data;
+ unsigned long flags;
+
+ /*
+ * The recovery and unblock work get run from the same workqueue,
+ * so try to cancel it if it was going to run after this unblock.
+ */
+ cancel_delayed_work(&session->recovery_work);
+ spin_lock_irqsave(&session->lock, flags);
+ session->state = ISCSI_SESSION_LOGGED_IN;
+ spin_unlock_irqrestore(&session->lock, flags);
+ /* start IO */
scsi_target_unblock(&session->dev);
+ /*
+ * Only do kernel scanning if the driver is properly hooked into
+ * the async scanning code (drivers like iscsi_tcp do login and
+ * scanning from userspace).
+ */
+ if (shost->hostt->scan_finished) {
+ if (queue_work(ihost->scan_workq, &session->scan_work))
+ atomic_inc(&ihost->nr_scans);
+ }
+}
+
+/**
+ * iscsi_unblock_session - set a session as logged in and start IO.
+ * @session: iscsi session
+ *
+ * Mark a session as ready to accept IO.
+ */
+void iscsi_unblock_session(struct iscsi_cls_session *session)
+{
+ queue_work(iscsi_eh_timer_workq, &session->unblock_work);
+ /*
+ * make sure all the events have completed before tell the driver
+ * it is safe
+ */
+ flush_workqueue(iscsi_eh_timer_workq);
}
EXPORT_SYMBOL_GPL(iscsi_unblock_session);
-void iscsi_block_session(struct iscsi_cls_session *session)
+static void __iscsi_block_session(struct work_struct *work)
{
+ struct iscsi_cls_session *session =
+ container_of(work, struct iscsi_cls_session,
+ block_work);
+ unsigned long flags;
+
+ spin_lock_irqsave(&session->lock, flags);
+ session->state = ISCSI_SESSION_FAILED;
+ spin_unlock_irqrestore(&session->lock, flags);
scsi_target_block(&session->dev);
- schedule_delayed_work(&session->recovery_work,
- session->recovery_tmo * HZ);
+ queue_delayed_work(iscsi_eh_timer_workq, &session->recovery_work,
+ session->recovery_tmo * HZ);
+}
+
+void iscsi_block_session(struct iscsi_cls_session *session)
+{
+ queue_work(iscsi_eh_timer_workq, &session->block_work);
}
EXPORT_SYMBOL_GPL(iscsi_block_session);
-/**
- * iscsi_create_session - create iscsi class session
- * @shost: scsi host
- * @transport: iscsi transport
- *
- * This can be called from a LLD or iscsi_transport.
- **/
+static void __iscsi_unbind_session(struct work_struct *work)
+{
+ struct iscsi_cls_session *session =
+ container_of(work, struct iscsi_cls_session,
+ unbind_work);
+ struct Scsi_Host *shost = iscsi_session_to_shost(session);
+ struct iscsi_cls_host *ihost = shost->shost_data;
+
+ /* Prevent new scans and make sure scanning is not in progress */
+ mutex_lock(&ihost->mutex);
+ if (list_empty(&session->host_list)) {
+ mutex_unlock(&ihost->mutex);
+ return;
+ }
+ list_del_init(&session->host_list);
+ mutex_unlock(&ihost->mutex);
+
+ scsi_remove_target(&session->dev);
+ iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
+}
+
+static int iscsi_unbind_session(struct iscsi_cls_session *session)
+{
+ struct Scsi_Host *shost = iscsi_session_to_shost(session);
+ struct iscsi_cls_host *ihost = shost->shost_data;
+
+ return queue_work(ihost->scan_workq, &session->unbind_work);
+}
+
struct iscsi_cls_session *
-iscsi_create_session(struct Scsi_Host *shost,
- struct iscsi_transport *transport, int channel)
+iscsi_alloc_session(struct Scsi_Host *shost,
+ struct iscsi_transport *transport)
{
- struct iscsi_host *ihost;
struct iscsi_cls_session *session;
- int err;
-
- if (!try_module_get(transport->owner))
- return NULL;
session = kzalloc(sizeof(*session) + transport->sessiondata_size,
GFP_KERNEL);
if (!session)
- goto module_put;
+ return NULL;
+
session->transport = transport;
session->recovery_tmo = 120;
- INIT_WORK(&session->recovery_work, session_recovery_timedout, session);
+ session->state = ISCSI_SESSION_FREE;
+ INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
INIT_LIST_HEAD(&session->host_list);
INIT_LIST_HEAD(&session->sess_list);
+ INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
+ INIT_WORK(&session->block_work, __iscsi_block_session);
+ INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
+ INIT_WORK(&session->scan_work, iscsi_scan_session);
+ spin_lock_init(&session->lock);
+ /* this is released in the dev's release function */
+ scsi_host_get(shost);
+ session->dev.parent = &shost->shost_gendev;
+ session->dev.release = iscsi_session_release;
+ device_initialize(&session->dev);
if (transport->sessiondata_size)
session->dd_data = &session[1];
+ return session;
+}
+EXPORT_SYMBOL_GPL(iscsi_alloc_session);
- /* this is released in the dev's release function */
- scsi_host_get(shost);
- ihost = shost->shost_data;
+int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
+{
+ struct Scsi_Host *shost = iscsi_session_to_shost(session);
+ struct iscsi_cls_host *ihost;
+ unsigned long flags;
+ int err;
- session->sid = iscsi_session_nr++;
- session->channel = channel;
- session->target_id = ihost->next_target_id++;
+ ihost = shost->shost_data;
+ session->sid = atomic_add_return(1, &iscsi_session_nr);
+ session->target_id = target_id;
snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u",
session->sid);
- session->dev.parent = &shost->shost_gendev;
- session->dev.release = iscsi_session_release;
- err = device_register(&session->dev);
+ err = device_add(&session->dev);
if (err) {
- dev_printk(KERN_ERR, &session->dev, "iscsi: could not "
- "register session's dev\n");
- goto free_session;
+ iscsi_cls_session_printk(KERN_ERR, session,
+ "could not register session's dev\n");
+ goto release_host;
}
transport_register_device(&session->dev);
+ spin_lock_irqsave(&sesslock, flags);
+ list_add(&session->sess_list, &sesslist);
+ spin_unlock_irqrestore(&sesslock, flags);
+
mutex_lock(&ihost->mutex);
list_add(&session->host_list, &ihost->sessions);
mutex_unlock(&ihost->mutex);
- return session;
+ iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
+ return 0;
-free_session:
- kfree(session);
-module_put:
- module_put(transport->owner);
- return NULL;
+release_host:
+ scsi_host_put(shost);
+ return err;
}
-
-EXPORT_SYMBOL_GPL(iscsi_create_session);
+EXPORT_SYMBOL_GPL(iscsi_add_session);
/**
- * iscsi_destroy_session - destroy iscsi session
- * @session: iscsi_session
+ * iscsi_create_session - create iscsi class session
+ * @shost: scsi host
+ * @transport: iscsi transport
+ * @target_id: which target
*
- * Can be called by a LLD or iscsi_transport. There must not be
- * any running connections.
- **/
-int iscsi_destroy_session(struct iscsi_cls_session *session)
+ * This can be called from a LLD or iscsi_transport.
+ */
+struct iscsi_cls_session *
+iscsi_create_session(struct Scsi_Host *shost,
+ struct iscsi_transport *transport,
+ unsigned int target_id)
{
- struct Scsi_Host *shost = iscsi_session_to_shost(session);
- struct iscsi_host *ihost = shost->shost_data;
-
- if (!cancel_delayed_work(&session->recovery_work))
- flush_scheduled_work();
+ struct iscsi_cls_session *session;
- mutex_lock(&ihost->mutex);
- list_del(&session->host_list);
- mutex_unlock(&ihost->mutex);
+ session = iscsi_alloc_session(shost, transport);
+ if (!session)
+ return NULL;
- transport_unregister_device(&session->dev);
- device_unregister(&session->dev);
- return 0;
+ if (iscsi_add_session(session, target_id)) {
+ iscsi_free_session(session);
+ return NULL;
+ }
+ return session;
}
-
-EXPORT_SYMBOL_GPL(iscsi_destroy_session);
+EXPORT_SYMBOL_GPL(iscsi_create_session);
static void iscsi_conn_release(struct device *dev)
{
struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
struct device *parent = conn->dev.parent;
- kfree(conn->persistent_address);
kfree(conn);
put_device(parent);
}
return dev->release == iscsi_conn_release;
}
+static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
+{
+ if (!iscsi_is_conn_dev(dev))
+ return 0;
+ return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
+}
+
+void iscsi_remove_session(struct iscsi_cls_session *session)
+{
+ struct Scsi_Host *shost = iscsi_session_to_shost(session);
+ struct iscsi_cls_host *ihost = shost->shost_data;
+ unsigned long flags;
+ int err;
+
+ spin_lock_irqsave(&sesslock, flags);
+ list_del(&session->sess_list);
+ spin_unlock_irqrestore(&sesslock, flags);
+
+ /* make sure there are no blocks/unblocks queued */
+ flush_workqueue(iscsi_eh_timer_workq);
+ /* make sure the timedout callout is not running */
+ if (!cancel_delayed_work(&session->recovery_work))
+ flush_workqueue(iscsi_eh_timer_workq);
+ /*
+ * If we are blocked let commands flow again. The lld or iscsi
+ * layer should set up the queuecommand to fail commands.
+ * We assume that LLD will not be calling block/unblock while
+ * removing the session.
+ */
+ spin_lock_irqsave(&session->lock, flags);
+ session->state = ISCSI_SESSION_FREE;
+ spin_unlock_irqrestore(&session->lock, flags);
+
+ scsi_target_unblock(&session->dev);
+ /* flush running scans then delete devices */
+ flush_workqueue(ihost->scan_workq);
+ __iscsi_unbind_session(&session->unbind_work);
+
+ /* hw iscsi may not have removed all connections from session */
+ err = device_for_each_child(&session->dev, NULL,
+ iscsi_iter_destroy_conn_fn);
+ if (err)
+ iscsi_cls_session_printk(KERN_ERR, session,
+ "Could not delete all connections "
+ "for session. Error %d.\n", err);
+
+ transport_unregister_device(&session->dev);
+ device_del(&session->dev);
+}
+EXPORT_SYMBOL_GPL(iscsi_remove_session);
+
+void iscsi_free_session(struct iscsi_cls_session *session)
+{
+ iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
+ put_device(&session->dev);
+}
+EXPORT_SYMBOL_GPL(iscsi_free_session);
+
+/**
+ * iscsi_destroy_session - destroy iscsi session
+ * @session: iscsi_session
+ *
+ * Can be called by a LLD or iscsi_transport. There must not be
+ * any running connections.
+ */
+int iscsi_destroy_session(struct iscsi_cls_session *session)
+{
+ iscsi_remove_session(session);
+ iscsi_free_session(session);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(iscsi_destroy_session);
+
/**
* iscsi_create_conn - create iscsi class connection
* @session: iscsi cls session
* for software iscsi we could be trying to preallocate a connection struct
* in which case there could be two connection structs and cid would be
* non-zero.
- **/
+ */
struct iscsi_cls_conn *
iscsi_create_conn(struct iscsi_cls_session *session, uint32_t cid)
{
struct iscsi_transport *transport = session->transport;
struct iscsi_cls_conn *conn;
+ unsigned long flags;
int err;
conn = kzalloc(sizeof(*conn) + transport->conndata_size, GFP_KERNEL);
conn->dev.release = iscsi_conn_release;
err = device_register(&conn->dev);
if (err) {
- dev_printk(KERN_ERR, &conn->dev, "iscsi: could not register "
- "connection's dev\n");
+ iscsi_cls_session_printk(KERN_ERR, session, "could not "
+ "register connection's dev\n");
goto release_parent_ref;
}
transport_register_device(&conn->dev);
+
+ spin_lock_irqsave(&connlock, flags);
+ list_add(&conn->conn_list, &connlist);
+ conn->active = 1;
+ spin_unlock_irqrestore(&connlock, flags);
return conn;
release_parent_ref:
/**
* iscsi_destroy_conn - destroy iscsi class connection
- * @session: iscsi cls session
+ * @conn: iscsi cls session
*
* This can be called from a LLD or iscsi_transport.
- **/
+ */
int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
{
+ unsigned long flags;
+
+ spin_lock_irqsave(&connlock, flags);
+ conn->active = 0;
+ list_del(&conn->conn_list);
+ spin_unlock_irqrestore(&connlock, flags);
+
transport_unregister_device(&conn->dev);
device_unregister(&conn->dev);
return 0;
}
-
EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
/*
return NULL;
}
-static inline struct list_head *skb_to_lh(struct sk_buff *skb)
-{
- return (struct list_head *)&skb->cb;
-}
-
-static void*
-mempool_zone_alloc_skb(gfp_t gfp_mask, void *pool_data)
-{
- struct mempool_zone *zone = pool_data;
-
- return alloc_skb(zone->size, gfp_mask);
-}
-
-static void
-mempool_zone_free_skb(void *element, void *pool_data)
-{
- kfree_skb(element);
-}
-
-static void
-mempool_zone_complete(struct mempool_zone *zone)
-{
- unsigned long flags;
- struct list_head *lh, *n;
-
- spin_lock_irqsave(&zone->freelock, flags);
- list_for_each_safe(lh, n, &zone->freequeue) {
- struct sk_buff *skb = (struct sk_buff *)((char *)lh -
- offsetof(struct sk_buff, cb));
- if (!skb_shared(skb)) {
- list_del(skb_to_lh(skb));
- mempool_free(skb, zone->pool);
- atomic_dec(&zone->allocated);
- }
- }
- spin_unlock_irqrestore(&zone->freelock, flags);
-}
-
-static struct mempool_zone *
-mempool_zone_init(unsigned max, unsigned size, unsigned hiwat)
+static int
+iscsi_broadcast_skb(struct sk_buff *skb, gfp_t gfp)
{
- struct mempool_zone *zp;
-
- zp = kzalloc(sizeof(*zp), GFP_KERNEL);
- if (!zp)
- return NULL;
-
- zp->size = size;
- zp->hiwat = hiwat;
- INIT_LIST_HEAD(&zp->freequeue);
- spin_lock_init(&zp->freelock);
- atomic_set(&zp->allocated, 0);
+ int rc;
- zp->pool = mempool_create(max, mempool_zone_alloc_skb,
- mempool_zone_free_skb, zp);
- if (!zp->pool) {
- kfree(zp);
- return NULL;
+ rc = netlink_broadcast(nls, skb, 0, 1, gfp);
+ if (rc < 0) {
+ printk(KERN_ERR "iscsi: can not broadcast skb (%d)\n", rc);
+ return rc;
}
- return zp;
-}
-
-static void mempool_zone_destroy(struct mempool_zone *zp)
-{
- mempool_destroy(zp->pool);
- kfree(zp);
-}
-
-static struct sk_buff*
-mempool_zone_get_skb(struct mempool_zone *zone)
-{
- struct sk_buff *skb;
-
- skb = mempool_alloc(zone->pool, GFP_ATOMIC);
- if (skb)
- atomic_inc(&zone->allocated);
- return skb;
+ return 0;
}
static int
-iscsi_unicast_skb(struct mempool_zone *zone, struct sk_buff *skb)
+iscsi_unicast_skb(struct sk_buff *skb, int pid)
{
- unsigned long flags;
int rc;
- skb_get(skb);
- rc = netlink_unicast(nls, skb, daemon_pid, MSG_DONTWAIT);
+ rc = netlink_unicast(nls, skb, pid, MSG_DONTWAIT);
if (rc < 0) {
- mempool_free(skb, zone->pool);
printk(KERN_ERR "iscsi: can not unicast skb (%d)\n", rc);
return rc;
}
- spin_lock_irqsave(&zone->freelock, flags);
- INIT_LIST_HEAD(skb_to_lh(skb));
- list_add(skb_to_lh(skb), &zone->freequeue);
- spin_unlock_irqrestore(&zone->freelock, flags);
-
return 0;
}
struct sk_buff *skb;
struct iscsi_uevent *ev;
char *pdu;
+ struct iscsi_internal *priv;
int len = NLMSG_SPACE(sizeof(*ev) + sizeof(struct iscsi_hdr) +
data_size);
- mempool_zone_complete(conn->z_pdu);
+ priv = iscsi_if_transport_lookup(conn->transport);
+ if (!priv)
+ return -EINVAL;
- skb = mempool_zone_get_skb(conn->z_pdu);
+ skb = alloc_skb(len, GFP_ATOMIC);
if (!skb) {
iscsi_conn_error(conn, ISCSI_ERR_CONN_FAILED);
- dev_printk(KERN_ERR, &conn->dev, "iscsi: can not deliver "
- "control PDU: OOM\n");
+ iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
+ "control PDU: OOM\n");
return -ENOMEM;
}
- nlh = __nlmsg_put(skb, daemon_pid, 0, 0, (len - sizeof(*nlh)), 0);
+ nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0);
ev = NLMSG_DATA(nlh);
memset(ev, 0, sizeof(*ev));
ev->transport_handle = iscsi_handle(conn->transport);
ev->type = ISCSI_KEVENT_RECV_PDU;
- if (atomic_read(&conn->z_pdu->allocated) >= conn->z_pdu->hiwat)
- ev->iferror = -ENOMEM;
ev->r.recv_req.cid = conn->cid;
ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
pdu = (char*)ev + sizeof(*ev);
memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
- return iscsi_unicast_skb(conn->z_pdu, skb);
+ return iscsi_unicast_skb(skb, priv->daemon_pid);
}
EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
struct nlmsghdr *nlh;
struct sk_buff *skb;
struct iscsi_uevent *ev;
+ struct iscsi_internal *priv;
int len = NLMSG_SPACE(sizeof(*ev));
- mempool_zone_complete(conn->z_error);
+ priv = iscsi_if_transport_lookup(conn->transport);
+ if (!priv)
+ return;
- skb = mempool_zone_get_skb(conn->z_error);
+ skb = alloc_skb(len, GFP_ATOMIC);
if (!skb) {
- dev_printk(KERN_ERR, &conn->dev, "iscsi: gracefully ignored "
- "conn error (%d)\n", error);
+ iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
+ "conn error (%d)\n", error);
return;
}
- nlh = __nlmsg_put(skb, daemon_pid, 0, 0, (len - sizeof(*nlh)), 0);
+ nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0);
ev = NLMSG_DATA(nlh);
ev->transport_handle = iscsi_handle(conn->transport);
ev->type = ISCSI_KEVENT_CONN_ERROR;
- if (atomic_read(&conn->z_error->allocated) >= conn->z_error->hiwat)
- ev->iferror = -ENOMEM;
ev->r.connerror.error = error;
ev->r.connerror.cid = conn->cid;
ev->r.connerror.sid = iscsi_conn_get_sid(conn);
- iscsi_unicast_skb(conn->z_error, skb);
+ iscsi_broadcast_skb(skb, GFP_ATOMIC);
- dev_printk(KERN_INFO, &conn->dev, "iscsi: detected conn error (%d)\n",
- error);
+ iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
+ error);
}
EXPORT_SYMBOL_GPL(iscsi_conn_error);
int flags = multi ? NLM_F_MULTI : 0;
int t = done ? NLMSG_DONE : type;
- mempool_zone_complete(z_reply);
-
- skb = mempool_zone_get_skb(z_reply);
- /*
- * FIXME:
- * user is supposed to react on iferror == -ENOMEM;
- * see iscsi_if_rx().
- */
- BUG_ON(!skb);
+ skb = alloc_skb(len, GFP_ATOMIC);
+ if (!skb) {
+ printk(KERN_ERR "Could not allocate skb to send reply.\n");
+ return -ENOMEM;
+ }
nlh = __nlmsg_put(skb, pid, seq, t, (len - sizeof(*nlh)), 0);
nlh->nlmsg_flags = flags;
memcpy(NLMSG_DATA(nlh), payload, size);
- return iscsi_unicast_skb(z_reply, skb);
+ return iscsi_unicast_skb(skb, pid);
}
static int
struct iscsi_cls_conn *conn;
struct nlmsghdr *nlhstat;
struct iscsi_uevent *evstat;
+ struct iscsi_internal *priv;
int len = NLMSG_SPACE(sizeof(*ev) +
sizeof(struct iscsi_stats) +
sizeof(struct iscsi_stats_custom) *
ISCSI_STATS_CUSTOM_MAX);
int err = 0;
+ priv = iscsi_if_transport_lookup(transport);
+ if (!priv)
+ return -EINVAL;
+
conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
if (!conn)
return -EEXIST;
do {
int actual_size;
- mempool_zone_complete(conn->z_pdu);
-
- skbstat = mempool_zone_get_skb(conn->z_pdu);
+ skbstat = alloc_skb(len, GFP_ATOMIC);
if (!skbstat) {
- dev_printk(KERN_ERR, &conn->dev, "iscsi: can not "
- "deliver stats: OOM\n");
+ iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
+ "deliver stats: OOM\n");
return -ENOMEM;
}
- nlhstat = __nlmsg_put(skbstat, daemon_pid, 0, 0,
+ nlhstat = __nlmsg_put(skbstat, priv->daemon_pid, 0, 0,
(len - sizeof(*nlhstat)), 0);
evstat = NLMSG_DATA(nlhstat);
memset(evstat, 0, sizeof(*evstat));
evstat->transport_handle = iscsi_handle(conn->transport);
evstat->type = nlh->nlmsg_type;
- if (atomic_read(&conn->z_pdu->allocated) >= conn->z_pdu->hiwat)
- evstat->iferror = -ENOMEM;
evstat->u.get_stats.cid =
ev->u.get_stats.cid;
evstat->u.get_stats.sid =
skb_trim(skbstat, NLMSG_ALIGN(actual_size));
nlhstat->nlmsg_len = actual_size;
- err = iscsi_unicast_skb(conn->z_pdu, skbstat);
+ err = iscsi_unicast_skb(skbstat, priv->daemon_pid);
} while (err < 0 && err != -ECONNREFUSED);
return err;
}
+/**
+ * iscsi_session_event - send session destr. completion event
+ * @session: iscsi class session
+ * @event: type of event
+ */
+int iscsi_session_event(struct iscsi_cls_session *session,
+ enum iscsi_uevent_e event)
+{
+ struct iscsi_internal *priv;
+ struct Scsi_Host *shost;
+ struct iscsi_uevent *ev;
+ struct sk_buff *skb;
+ struct nlmsghdr *nlh;
+ int rc, len = NLMSG_SPACE(sizeof(*ev));
+
+ priv = iscsi_if_transport_lookup(session->transport);
+ if (!priv)
+ return -EINVAL;
+ shost = iscsi_session_to_shost(session);
+
+ skb = alloc_skb(len, GFP_KERNEL);
+ if (!skb) {
+ iscsi_cls_session_printk(KERN_ERR, session,
+ "Cannot notify userspace of session "
+ "event %u\n", event);
+ return -ENOMEM;
+ }
+
+ nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0);
+ ev = NLMSG_DATA(nlh);
+ ev->transport_handle = iscsi_handle(session->transport);
+
+ ev->type = event;
+ switch (event) {
+ case ISCSI_KEVENT_DESTROY_SESSION:
+ ev->r.d_session.host_no = shost->host_no;
+ ev->r.d_session.sid = session->sid;
+ break;
+ case ISCSI_KEVENT_CREATE_SESSION:
+ ev->r.c_session_ret.host_no = shost->host_no;
+ ev->r.c_session_ret.sid = session->sid;
+ break;
+ case ISCSI_KEVENT_UNBIND_SESSION:
+ ev->r.unbind_session.host_no = shost->host_no;
+ ev->r.unbind_session.sid = session->sid;
+ break;
+ default:
+ iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
+ "%u.\n", event);
+ kfree_skb(skb);
+ return -EINVAL;
+ }
+
+ /*
+ * this will occur if the daemon is not up, so we just warn
+ * the user and when the daemon is restarted it will handle it
+ */
+ rc = iscsi_broadcast_skb(skb, GFP_KERNEL);
+ if (rc < 0)
+ iscsi_cls_session_printk(KERN_ERR, session,
+ "Cannot notify userspace of session "
+ "event %u. Check iscsi daemon\n",
+ event);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(iscsi_session_event);
+
static int
-iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_uevent *ev)
+iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_uevent *ev,
+ uint32_t host_no, uint32_t initial_cmdsn,
+ uint16_t cmds_max, uint16_t queue_depth)
{
struct iscsi_transport *transport = priv->iscsi_transport;
struct iscsi_cls_session *session;
- unsigned long flags;
- uint32_t hostno;
+ struct Scsi_Host *shost = NULL;
- session = transport->create_session(transport, &priv->t,
- ev->u.c_session.initial_cmdsn,
- &hostno);
+ /*
+ * Software iscsi allocates a host per session, but
+ * offload drivers (and possibly iser one day) allocate a host per
+ * hba/nic/rnic. Offload will match a host here, but software will
+ * return a new hostno after the create_session callback has returned.
+ */
+ if (host_no != UINT_MAX) {
+ shost = scsi_host_lookup(host_no);
+ if (IS_ERR(shost)) {
+ printk(KERN_ERR "Could not find host no %u to "
+ "create session\n", host_no);
+ return -ENODEV;
+ }
+ }
+
+ session = transport->create_session(transport, &priv->t, shost,
+ cmds_max, queue_depth,
+ initial_cmdsn, &host_no);
+ if (shost)
+ scsi_host_put(shost);
if (!session)
return -ENOMEM;
- spin_lock_irqsave(&sesslock, flags);
- list_add(&session->sess_list, &sesslist);
- spin_unlock_irqrestore(&sesslock, flags);
-
- ev->r.c_session_ret.host_no = hostno;
+ ev->r.c_session_ret.host_no = host_no;
ev->r.c_session_ret.sid = session->sid;
return 0;
}
{
struct iscsi_cls_conn *conn;
struct iscsi_cls_session *session;
- unsigned long flags;
session = iscsi_session_lookup(ev->u.c_conn.sid);
if (!session) {
- printk(KERN_ERR "iscsi: invalid session %d\n",
+ printk(KERN_ERR "iscsi: invalid session %d.\n",
ev->u.c_conn.sid);
return -EINVAL;
}
conn = transport->create_conn(session, ev->u.c_conn.cid);
if (!conn) {
- printk(KERN_ERR "iscsi: couldn't create a new "
- "connection for session %d\n",
- session->sid);
+ iscsi_cls_session_printk(KERN_ERR, session,
+ "couldn't create a new connection.");
return -ENOMEM;
}
- conn->z_pdu = mempool_zone_init(Z_MAX_PDU,
- NLMSG_SPACE(sizeof(struct iscsi_uevent) +
- sizeof(struct iscsi_hdr) +
- DEFAULT_MAX_RECV_DATA_SEGMENT_LENGTH),
- Z_HIWAT_PDU);
- if (!conn->z_pdu) {
- dev_printk(KERN_ERR, &conn->dev, "iscsi: can not allocate "
- "pdu zone for new conn\n");
- goto destroy_conn;
- }
-
- conn->z_error = mempool_zone_init(Z_MAX_ERROR,
- NLMSG_SPACE(sizeof(struct iscsi_uevent)),
- Z_HIWAT_ERROR);
- if (!conn->z_error) {
- dev_printk(KERN_ERR, &conn->dev, "iscsi: can not allocate "
- "error zone for new conn\n");
- goto free_pdu_pool;
- }
-
ev->r.c_conn_ret.sid = session->sid;
ev->r.c_conn_ret.cid = conn->cid;
-
- spin_lock_irqsave(&connlock, flags);
- list_add(&conn->conn_list, &connlist);
- conn->active = 1;
- spin_unlock_irqrestore(&connlock, flags);
-
return 0;
-
-free_pdu_pool:
- mempool_zone_destroy(conn->z_pdu);
-destroy_conn:
- if (transport->destroy_conn)
- transport->destroy_conn(conn->dd_data);
- return -ENOMEM;
}
static int
iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
{
- unsigned long flags;
struct iscsi_cls_conn *conn;
- struct mempool_zone *z_error, *z_pdu;
conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
if (!conn)
return -EINVAL;
- spin_lock_irqsave(&connlock, flags);
- conn->active = 0;
- list_del(&conn->conn_list);
- spin_unlock_irqrestore(&connlock, flags);
-
- z_pdu = conn->z_pdu;
- z_error = conn->z_error;
if (transport->destroy_conn)
transport->destroy_conn(conn);
-
- mempool_zone_destroy(z_pdu);
- mempool_zone_destroy(z_error);
-
return 0;
}
-static void
-iscsi_copy_param(struct iscsi_uevent *ev, uint32_t *value, char *data)
-{
- if (ev->u.set_param.len != sizeof(uint32_t))
- BUG();
- memcpy(value, data, min_t(uint32_t, sizeof(uint32_t),
- ev->u.set_param.len));
-}
-
static int
iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
{
char *data = (char*)ev + sizeof(*ev);
struct iscsi_cls_conn *conn;
struct iscsi_cls_session *session;
- int err = 0;
- uint32_t value = 0;
+ int err = 0, value = 0;
session = iscsi_session_lookup(ev->u.set_param.sid);
conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
switch (ev->u.set_param.param) {
case ISCSI_PARAM_SESS_RECOVERY_TMO:
- iscsi_copy_param(ev, &value, data);
+ sscanf(data, "%d", &value);
if (value != 0)
session->recovery_tmo = value;
break;
- case ISCSI_PARAM_TARGET_NAME:
- /* this should not change between logins */
- if (session->targetname)
- return 0;
-
- session->targetname = kstrdup(data, GFP_KERNEL);
- if (!session->targetname)
- return -ENOMEM;
- break;
- case ISCSI_PARAM_TPGT:
- iscsi_copy_param(ev, &value, data);
- session->tpgt = value;
- break;
- case ISCSI_PARAM_PERSISTENT_PORT:
- iscsi_copy_param(ev, &value, data);
- conn->persistent_port = value;
- break;
- case ISCSI_PARAM_PERSISTENT_ADDRESS:
- /*
- * this is the address returned in discovery so it should
- * not change between logins.
- */
- if (conn->persistent_address)
- return 0;
-
- conn->persistent_address = kstrdup(data, GFP_KERNEL);
- if (!conn->persistent_address)
- return -ENOMEM;
- break;
default:
- iscsi_copy_param(ev, &value, data);
- err = transport->set_param(conn, ev->u.set_param.param, value);
+ err = transport->set_param(conn, ev->u.set_param.param,
+ data, ev->u.set_param.len);
}
return err;
return rc;
}
+static int
+iscsi_tgt_dscvr(struct iscsi_transport *transport,
+ struct iscsi_uevent *ev)
+{
+ struct Scsi_Host *shost;
+ struct sockaddr *dst_addr;
+ int err;
+
+ if (!transport->tgt_dscvr)
+ return -EINVAL;
+
+ shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
+ if (IS_ERR(shost)) {
+ printk(KERN_ERR "target discovery could not find host no %u\n",
+ ev->u.tgt_dscvr.host_no);
+ return -ENODEV;
+ }
+
+
+ dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
+ err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
+ ev->u.tgt_dscvr.enable, dst_addr);
+ scsi_host_put(shost);
+ return err;
+}
+
+static int
+iscsi_set_host_param(struct iscsi_transport *transport,
+ struct iscsi_uevent *ev)
+{
+ char *data = (char*)ev + sizeof(*ev);
+ struct Scsi_Host *shost;
+ int err;
+
+ if (!transport->set_host_param)
+ return -ENOSYS;
+
+ shost = scsi_host_lookup(ev->u.set_host_param.host_no);
+ if (IS_ERR(shost)) {
+ printk(KERN_ERR "set_host_param could not find host no %u\n",
+ ev->u.set_host_param.host_no);
+ return -ENODEV;
+ }
+
+ err = transport->set_host_param(shost, ev->u.set_host_param.param,
+ data, ev->u.set_host_param.len);
+ scsi_host_put(shost);
+ return err;
+}
+
static int
iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
{
int err = 0;
+ uint32_t host_no = UINT_MAX;
struct iscsi_uevent *ev = NLMSG_DATA(nlh);
struct iscsi_transport *transport = NULL;
struct iscsi_internal *priv;
struct iscsi_cls_session *session;
struct iscsi_cls_conn *conn;
- unsigned long flags;
priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
if (!priv)
if (!try_module_get(transport->owner))
return -EINVAL;
+ priv->daemon_pid = NETLINK_CREDS(skb)->pid;
+
switch (nlh->nlmsg_type) {
case ISCSI_UEVENT_CREATE_SESSION:
- err = iscsi_if_create_session(priv, ev);
+ err = iscsi_if_create_session(priv, ev, host_no,
+ ev->u.c_session.initial_cmdsn,
+ ev->u.c_session.cmds_max,
+ ev->u.c_session.queue_depth);
+ break;
+ case ISCSI_UEVENT_CREATE_BOUND_SESSION:
+ err = iscsi_if_create_session(priv, ev,
+ ev->u.c_bound_session.host_no,
+ ev->u.c_bound_session.initial_cmdsn,
+ ev->u.c_bound_session.cmds_max,
+ ev->u.c_bound_session.queue_depth);
break;
case ISCSI_UEVENT_DESTROY_SESSION:
session = iscsi_session_lookup(ev->u.d_session.sid);
- if (session) {
- spin_lock_irqsave(&sesslock, flags);
- list_del(&session->sess_list);
- spin_unlock_irqrestore(&sesslock, flags);
-
+ if (session)
transport->destroy_session(session);
- } else
+ else
+ err = -EINVAL;
+ break;
+ case ISCSI_UEVENT_UNBIND_SESSION:
+ session = iscsi_session_lookup(ev->u.d_session.sid);
+ if (session)
+ iscsi_unbind_session(session);
+ else
err = -EINVAL;
break;
case ISCSI_UEVENT_CREATE_CONN:
case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
break;
+ case ISCSI_UEVENT_TGT_DSCVR:
+ err = iscsi_tgt_dscvr(transport, ev);
+ break;
+ case ISCSI_UEVENT_SET_HOST_PARAM:
+ err = iscsi_set_host_param(transport, ev);
+ break;
default:
- err = -EINVAL;
+ err = -ENOSYS;
break;
}
}
/*
- * Get message from skb (based on rtnetlink_rcv_skb). Each message is
- * processed by iscsi_if_recv_msg. Malformed skbs with wrong lengths or
- * invalid creds are discarded silently.
+ * Get message from skb. Each message is processed by iscsi_if_recv_msg.
+ * Malformed skbs with wrong lengths or invalid creds are not processed.
*/
static void
-iscsi_if_rx(struct sock *sk, int len)
+iscsi_if_rx(struct sk_buff *skb)
{
- struct sk_buff *skb;
-
mutex_lock(&rx_queue_mutex);
- while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
- if (NETLINK_CREDS(skb)->uid) {
- skb_pull(skb, skb->len);
- goto free_skb;
+ while (skb->len >= NLMSG_SPACE(0)) {
+ int err;
+ uint32_t rlen;
+ struct nlmsghdr *nlh;
+ struct iscsi_uevent *ev;
+
+ nlh = nlmsg_hdr(skb);
+ if (nlh->nlmsg_len < sizeof(*nlh) ||
+ skb->len < nlh->nlmsg_len) {
+ break;
}
- daemon_pid = NETLINK_CREDS(skb)->pid;
- while (skb->len >= NLMSG_SPACE(0)) {
- int err;
- uint32_t rlen;
- struct nlmsghdr *nlh;
- struct iscsi_uevent *ev;
+ ev = NLMSG_DATA(nlh);
+ rlen = NLMSG_ALIGN(nlh->nlmsg_len);
+ if (rlen > skb->len)
+ rlen = skb->len;
- nlh = (struct nlmsghdr *)skb->data;
- if (nlh->nlmsg_len < sizeof(*nlh) ||
- skb->len < nlh->nlmsg_len) {
- break;
- }
-
- ev = NLMSG_DATA(nlh);
- rlen = NLMSG_ALIGN(nlh->nlmsg_len);
- if (rlen > skb->len)
- rlen = skb->len;
-
- err = iscsi_if_recv_msg(skb, nlh);
- if (err) {
- ev->type = ISCSI_KEVENT_IF_ERROR;
- ev->iferror = err;
- }
- do {
- /*
- * special case for GET_STATS:
- * on success - sending reply and stats from
- * inside of if_recv_msg(),
- * on error - fall through.
- */
- if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
- break;
- err = iscsi_if_send_reply(
- NETLINK_CREDS(skb)->pid, nlh->nlmsg_seq,
- nlh->nlmsg_type, 0, 0, ev, sizeof(*ev));
- if (atomic_read(&z_reply->allocated) >=
- z_reply->hiwat)
- ev->iferror = -ENOMEM;
- } while (err < 0 && err != -ECONNREFUSED);
- skb_pull(skb, rlen);
+ err = iscsi_if_recv_msg(skb, nlh);
+ if (err) {
+ ev->type = ISCSI_KEVENT_IF_ERROR;
+ ev->iferror = err;
}
-free_skb:
- kfree_skb(skb);
+ do {
+ /*
+ * special case for GET_STATS:
+ * on success - sending reply and stats from
+ * inside of if_recv_msg(),
+ * on error - fall through.
+ */
+ if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
+ break;
+ err = iscsi_if_send_reply(
+ NETLINK_CREDS(skb)->pid, nlh->nlmsg_seq,
+ nlh->nlmsg_type, 0, 0, ev, sizeof(*ev));
+ } while (err < 0 && err != -ECONNREFUSED);
+ skb_pull(skb, rlen);
}
mutex_unlock(&rx_queue_mutex);
}
-#define iscsi_cdev_to_conn(_cdev) \
- iscsi_dev_to_conn(_cdev->dev)
-
#define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
-struct class_device_attribute class_device_attr_##_prefix##_##_name = \
+struct device_attribute dev_attr_##_prefix##_##_name = \
__ATTR(_name,_mode,_show,_store)
/*
* iSCSI connection attrs
*/
-#define iscsi_conn_int_attr_show(param, format) \
+#define iscsi_conn_attr_show(param) \
static ssize_t \
-show_conn_int_param_##param(struct class_device *cdev, char *buf) \
+show_conn_param_##param(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
{ \
- uint32_t value = 0; \
- struct iscsi_cls_conn *conn = iscsi_cdev_to_conn(cdev); \
+ struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
struct iscsi_transport *t = conn->transport; \
- \
- t->get_conn_param(conn, param, &value); \
- return snprintf(buf, 20, format"\n", value); \
+ return t->get_conn_param(conn, param, buf); \
}
-#define iscsi_conn_int_attr(field, param, format) \
- iscsi_conn_int_attr_show(param, format) \
-static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_int_param_##param, \
+#define iscsi_conn_attr(field, param) \
+ iscsi_conn_attr_show(param) \
+static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
NULL);
-iscsi_conn_int_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH, "%u");
-iscsi_conn_int_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH, "%u");
-iscsi_conn_int_attr(header_digest, ISCSI_PARAM_HDRDGST_EN, "%d");
-iscsi_conn_int_attr(data_digest, ISCSI_PARAM_DATADGST_EN, "%d");
-iscsi_conn_int_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN, "%d");
-iscsi_conn_int_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN, "%d");
-iscsi_conn_int_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT, "%d");
-iscsi_conn_int_attr(port, ISCSI_PARAM_CONN_PORT, "%d");
-
-#define iscsi_conn_str_attr_show(param) \
-static ssize_t \
-show_conn_str_param_##param(struct class_device *cdev, char *buf) \
-{ \
- struct iscsi_cls_conn *conn = iscsi_cdev_to_conn(cdev); \
- struct iscsi_transport *t = conn->transport; \
- return t->get_conn_str_param(conn, param, buf); \
-}
-
-#define iscsi_conn_str_attr(field, param) \
- iscsi_conn_str_attr_show(param) \
-static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_str_param_##param, \
- NULL);
-
-iscsi_conn_str_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
-iscsi_conn_str_attr(address, ISCSI_PARAM_CONN_ADDRESS);
-
-#define iscsi_cdev_to_session(_cdev) \
- iscsi_dev_to_session(_cdev->dev)
+iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
+iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
+iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
+iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
+iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
+iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
+iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
+iscsi_conn_attr(port, ISCSI_PARAM_CONN_PORT);
+iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
+iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
+iscsi_conn_attr(address, ISCSI_PARAM_CONN_ADDRESS);
+iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
+iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
/*
* iSCSI session attrs
*/
-#define iscsi_session_int_attr_show(param, format) \
+#define iscsi_session_attr_show(param, perm) \
static ssize_t \
-show_session_int_param_##param(struct class_device *cdev, char *buf) \
+show_session_param_##param(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
{ \
- uint32_t value = 0; \
- struct iscsi_cls_session *session = iscsi_cdev_to_session(cdev); \
+ struct iscsi_cls_session *session = \
+ iscsi_dev_to_session(dev->parent); \
struct iscsi_transport *t = session->transport; \
\
- t->get_session_param(session, param, &value); \
- return snprintf(buf, 20, format"\n", value); \
+ if (perm && !capable(CAP_SYS_ADMIN)) \
+ return -EACCES; \
+ return t->get_session_param(session, param, buf); \
}
-#define iscsi_session_int_attr(field, param, format) \
- iscsi_session_int_attr_show(param, format) \
-static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_int_param_##param, \
+#define iscsi_session_attr(field, param, perm) \
+ iscsi_session_attr_show(param, perm) \
+static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
NULL);
-iscsi_session_int_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, "%d");
-iscsi_session_int_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, "%hu");
-iscsi_session_int_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, "%d");
-iscsi_session_int_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, "%u");
-iscsi_session_int_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, "%u");
-iscsi_session_int_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, "%d");
-iscsi_session_int_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, "%d");
-iscsi_session_int_attr(erl, ISCSI_PARAM_ERL, "%d");
-iscsi_session_int_attr(tpgt, ISCSI_PARAM_TPGT, "%d");
-
-#define iscsi_session_str_attr_show(param) \
-static ssize_t \
-show_session_str_param_##param(struct class_device *cdev, char *buf) \
-{ \
- struct iscsi_cls_session *session = iscsi_cdev_to_session(cdev); \
- struct iscsi_transport *t = session->transport; \
- return t->get_session_str_param(session, param, buf); \
-}
+iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
+iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
+iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
+iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
+iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
+iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
+iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
+iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
+iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
+iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
+iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
+iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
+iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
+iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
+iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
+iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
+iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
-#define iscsi_session_str_attr(field, param) \
- iscsi_session_str_attr_show(param) \
-static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_str_param_##param, \
+static ssize_t
+show_priv_session_state(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
+ return sprintf(buf, "%s\n", iscsi_session_state_name(session->state));
+}
+static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
NULL);
-iscsi_session_str_attr(targetname, ISCSI_PARAM_TARGET_NAME);
-
-/*
- * Private session and conn attrs. userspace uses several iscsi values
- * to identify each session between reboots. Some of these values may not
- * be present in the iscsi_transport/LLD driver becuase userspace handles
- * login (and failback for login redirect) so for these type of drivers
- * the class manages the attrs and values for the iscsi_transport/LLD
- */
#define iscsi_priv_session_attr_show(field, format) \
static ssize_t \
-show_priv_session_##field(struct class_device *cdev, char *buf) \
+show_priv_session_##field(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
{ \
- struct iscsi_cls_session *session = iscsi_cdev_to_session(cdev); \
+ struct iscsi_cls_session *session = \
+ iscsi_dev_to_session(dev->parent); \
return sprintf(buf, format"\n", session->field); \
}
iscsi_priv_session_attr_show(field, format) \
static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO, show_priv_session_##field, \
NULL)
-iscsi_priv_session_attr(targetname, "%s");
-iscsi_priv_session_attr(tpgt, "%d");
iscsi_priv_session_attr(recovery_tmo, "%d");
-#define iscsi_priv_conn_attr_show(field, format) \
+/*
+ * iSCSI host attrs
+ */
+#define iscsi_host_attr_show(param) \
static ssize_t \
-show_priv_conn_##field(struct class_device *cdev, char *buf) \
+show_host_param_##param(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
{ \
- struct iscsi_cls_conn *conn = iscsi_cdev_to_conn(cdev); \
- return sprintf(buf, format"\n", conn->field); \
+ struct Scsi_Host *shost = transport_class_to_shost(dev); \
+ struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
+ return priv->iscsi_transport->get_host_param(shost, param, buf); \
}
-#define iscsi_priv_conn_attr(field, format) \
- iscsi_priv_conn_attr_show(field, format) \
-static ISCSI_CLASS_ATTR(priv_conn, field, S_IRUGO, show_priv_conn_##field, \
- NULL)
-iscsi_priv_conn_attr(persistent_address, "%s");
-iscsi_priv_conn_attr(persistent_port, "%d");
+#define iscsi_host_attr(field, param) \
+ iscsi_host_attr_show(param) \
+static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
+ NULL);
+
+iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
+iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
+iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
+iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
#define SETUP_PRIV_SESSION_RD_ATTR(field) \
do { \
- priv->session_attrs[count] = &class_device_attr_priv_sess_##field; \
+ priv->session_attrs[count] = &dev_attr_priv_sess_##field; \
count++; \
} while (0)
+
#define SETUP_SESSION_RD_ATTR(field, param_flag) \
do { \
if (tt->param_mask & param_flag) { \
- priv->session_attrs[count] = &class_device_attr_sess_##field; \
+ priv->session_attrs[count] = &dev_attr_sess_##field; \
count++; \
} \
} while (0)
-#define SETUP_PRIV_CONN_RD_ATTR(field) \
+#define SETUP_CONN_RD_ATTR(field, param_flag) \
do { \
- priv->conn_attrs[count] = &class_device_attr_priv_conn_##field; \
- count++; \
+ if (tt->param_mask & param_flag) { \
+ priv->conn_attrs[count] = &dev_attr_conn_##field; \
+ count++; \
+ } \
} while (0)
-#define SETUP_CONN_RD_ATTR(field, param_flag) \
+#define SETUP_HOST_RD_ATTR(field, param_flag) \
do { \
- if (tt->param_mask & param_flag) { \
- priv->conn_attrs[count] = &class_device_attr_conn_##field; \
+ if (tt->host_param_mask & param_flag) { \
+ priv->host_attrs[count] = &dev_attr_host_##field; \
count++; \
} \
} while (0)
if (!priv)
return NULL;
INIT_LIST_HEAD(&priv->list);
+ priv->daemon_pid = -1;
priv->iscsi_transport = tt;
priv->t.user_scan = iscsi_user_scan;
- priv->cdev.class = &iscsi_transport_class;
- snprintf(priv->cdev.class_id, BUS_ID_SIZE, "%s", tt->name);
- err = class_device_register(&priv->cdev);
+ priv->dev.class = &iscsi_transport_class;
+ snprintf(priv->dev.bus_id, BUS_ID_SIZE, "%s", tt->name);
+ err = device_register(&priv->dev);
if (err)
goto free_priv;
- err = sysfs_create_group(&priv->cdev.kobj, &iscsi_transport_group);
+ err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
if (err)
- goto unregister_cdev;
+ goto unregister_dev;
/* host parameters */
priv->t.host_attrs.ac.attrs = &priv->host_attrs[0];
priv->t.host_attrs.ac.class = &iscsi_host_class.class;
priv->t.host_attrs.ac.match = iscsi_host_match;
- priv->t.host_size = sizeof(struct iscsi_host);
- priv->host_attrs[0] = NULL;
+ priv->t.host_size = sizeof(struct iscsi_cls_host);
transport_container_register(&priv->t.host_attrs);
+ SETUP_HOST_RD_ATTR(netdev, ISCSI_HOST_NETDEV_NAME);
+ SETUP_HOST_RD_ATTR(ipaddress, ISCSI_HOST_IPADDRESS);
+ SETUP_HOST_RD_ATTR(hwaddress, ISCSI_HOST_HWADDRESS);
+ SETUP_HOST_RD_ATTR(initiatorname, ISCSI_HOST_INITIATOR_NAME);
+ BUG_ON(count > ISCSI_HOST_ATTRS);
+ priv->host_attrs[count] = NULL;
+ count = 0;
+
/* connection parameters */
priv->conn_cont.ac.attrs = &priv->conn_attrs[0];
priv->conn_cont.ac.class = &iscsi_connection_class.class;
SETUP_CONN_RD_ATTR(ofmarker, ISCSI_OFMARKER_EN);
SETUP_CONN_RD_ATTR(address, ISCSI_CONN_ADDRESS);
SETUP_CONN_RD_ATTR(port, ISCSI_CONN_PORT);
-
- if (tt->param_mask & ISCSI_PERSISTENT_ADDRESS)
- SETUP_CONN_RD_ATTR(persistent_address, ISCSI_PERSISTENT_ADDRESS);
- else
- SETUP_PRIV_CONN_RD_ATTR(persistent_address);
-
- if (tt->param_mask & ISCSI_PERSISTENT_PORT)
- SETUP_CONN_RD_ATTR(persistent_port, ISCSI_PERSISTENT_PORT);
- else
- SETUP_PRIV_CONN_RD_ATTR(persistent_port);
+ SETUP_CONN_RD_ATTR(exp_statsn, ISCSI_EXP_STATSN);
+ SETUP_CONN_RD_ATTR(persistent_address, ISCSI_PERSISTENT_ADDRESS);
+ SETUP_CONN_RD_ATTR(persistent_port, ISCSI_PERSISTENT_PORT);
+ SETUP_CONN_RD_ATTR(ping_tmo, ISCSI_PING_TMO);
+ SETUP_CONN_RD_ATTR(recv_tmo, ISCSI_RECV_TMO);
BUG_ON(count > ISCSI_CONN_ATTRS);
priv->conn_attrs[count] = NULL;
SETUP_SESSION_RD_ATTR(data_pdu_in_order, ISCSI_PDU_INORDER_EN);
SETUP_SESSION_RD_ATTR(data_seq_in_order, ISCSI_DATASEQ_INORDER_EN);
SETUP_SESSION_RD_ATTR(erl, ISCSI_ERL);
+ SETUP_SESSION_RD_ATTR(targetname, ISCSI_TARGET_NAME);
+ SETUP_SESSION_RD_ATTR(tpgt, ISCSI_TPGT);
+ SETUP_SESSION_RD_ATTR(password, ISCSI_USERNAME);
+ SETUP_SESSION_RD_ATTR(password_in, ISCSI_USERNAME_IN);
+ SETUP_SESSION_RD_ATTR(username, ISCSI_PASSWORD);
+ SETUP_SESSION_RD_ATTR(username_in, ISCSI_PASSWORD_IN);
+ SETUP_SESSION_RD_ATTR(fast_abort, ISCSI_FAST_ABORT);
+ SETUP_SESSION_RD_ATTR(abort_tmo, ISCSI_ABORT_TMO);
+ SETUP_SESSION_RD_ATTR(lu_reset_tmo,ISCSI_LU_RESET_TMO);
SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo);
-
- if (tt->param_mask & ISCSI_TARGET_NAME)
- SETUP_SESSION_RD_ATTR(targetname, ISCSI_TARGET_NAME);
- else
- SETUP_PRIV_SESSION_RD_ATTR(targetname);
-
- if (tt->param_mask & ISCSI_TPGT)
- SETUP_SESSION_RD_ATTR(tpgt, ISCSI_TPGT);
- else
- SETUP_PRIV_SESSION_RD_ATTR(tpgt);
+ SETUP_PRIV_SESSION_RD_ATTR(state);
BUG_ON(count > ISCSI_SESSION_ATTRS);
priv->session_attrs[count] = NULL;
printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
return &priv->t;
-unregister_cdev:
- class_device_unregister(&priv->cdev);
+unregister_dev:
+ device_unregister(&priv->dev);
free_priv:
kfree(priv);
return NULL;
transport_container_unregister(&priv->session_cont);
transport_container_unregister(&priv->t.host_attrs);
- sysfs_remove_group(&priv->cdev.kobj, &iscsi_transport_group);
- class_device_unregister(&priv->cdev);
+ sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
+ device_unregister(&priv->dev);
mutex_unlock(&rx_queue_mutex);
return 0;
}
EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
-static int
-iscsi_rcv_nl_event(struct notifier_block *this, unsigned long event, void *ptr)
-{
- struct netlink_notify *n = ptr;
-
- if (event == NETLINK_URELEASE &&
- n->protocol == NETLINK_ISCSI && n->pid) {
- struct iscsi_cls_conn *conn;
- unsigned long flags;
-
- mempool_zone_complete(z_reply);
- spin_lock_irqsave(&connlock, flags);
- list_for_each_entry(conn, &connlist, conn_list) {
- mempool_zone_complete(conn->z_error);
- mempool_zone_complete(conn->z_pdu);
- }
- spin_unlock_irqrestore(&connlock, flags);
- }
-
- return NOTIFY_DONE;
-}
-
-static struct notifier_block iscsi_nl_notifier = {
- .notifier_call = iscsi_rcv_nl_event,
-};
-
static __init int iscsi_transport_init(void)
{
int err;
+ printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
+ ISCSI_TRANSPORT_VERSION);
+
+ atomic_set(&iscsi_session_nr, 0);
+
err = class_register(&iscsi_transport_class);
if (err)
return err;
if (err)
goto unregister_conn_class;
- err = netlink_register_notifier(&iscsi_nl_notifier);
- if (err)
- goto unregister_session_class;
-
- nls = netlink_kernel_create(NETLINK_ISCSI, 1, iscsi_if_rx,
+ nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx, NULL,
THIS_MODULE);
if (!nls) {
err = -ENOBUFS;
- goto unregister_notifier;
+ goto unregister_session_class;
}
- z_reply = mempool_zone_init(Z_MAX_REPLY,
- NLMSG_SPACE(sizeof(struct iscsi_uevent)), Z_HIWAT_REPLY);
- if (z_reply)
- return 0;
+ iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh");
+ if (!iscsi_eh_timer_workq)
+ goto release_nls;
+
+ return 0;
- sock_release(nls->sk_socket);
-unregister_notifier:
- netlink_unregister_notifier(&iscsi_nl_notifier);
+release_nls:
+ netlink_kernel_release(nls);
unregister_session_class:
transport_class_unregister(&iscsi_session_class);
unregister_conn_class:
static void __exit iscsi_transport_exit(void)
{
- mempool_zone_destroy(z_reply);
- sock_release(nls->sk_socket);
- netlink_unregister_notifier(&iscsi_nl_notifier);
+ destroy_workqueue(iscsi_eh_timer_workq);
+ netlink_kernel_release(nls);
transport_class_unregister(&iscsi_connection_class);
transport_class_unregister(&iscsi_session_class);
transport_class_unregister(&iscsi_host_class);
"Alex Aizman <itn780@yahoo.com>");
MODULE_DESCRIPTION("iSCSI Transport Interface");
MODULE_LICENSE("GPL");
+MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
Code Review / linux-2.6.git / blobdiff