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@@ -1,8 +1,10 @@
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-/*
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+/*
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* iSCSI transport class definitions
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*
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* Copyright (C) IBM Corporation, 2004
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- * Copyright (C) Mike Christie, 2004
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+ * Copyright (C) Mike Christie, 2004 - 2005
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+ * Copyright (C) Dmitry Yusupov, 2004 - 2005
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+ * Copyright (C) Alex Aizman, 2004 - 2005
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@@ -19,370 +21,1253 @@
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <linux/module.h>
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+#include <linux/mempool.h>
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+#include <net/tcp.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_transport.h>
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#include <scsi/scsi_transport_iscsi.h>
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+#include <scsi/iscsi_if.h>
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-#define ISCSI_SESSION_ATTRS 20
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-#define ISCSI_HOST_ATTRS 2
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+#define ISCSI_SESSION_ATTRS 8
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+#define ISCSI_CONN_ATTRS 6
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struct iscsi_internal {
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struct scsi_transport_template t;
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- struct iscsi_function_template *fnt;
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+ struct iscsi_transport *iscsi_transport;
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+ struct list_head list;
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+ /*
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+ * List of sessions for this transport
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+ */
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+ struct list_head sessions;
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+ /*
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+ * lock to serialize access to the sessions list which must
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+ * be taken after the rx_queue_sema
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+ */
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+ spinlock_t session_lock;
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+ /*
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+ * based on transport capabilities, at register time we set these
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+ * bits to tell the transport class it wants attributes displayed
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+ * in sysfs or that it can support different iSCSI Data-Path
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+ * capabilities
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+ */
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+ uint32_t param_mask;
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+
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+ struct class_device cdev;
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/*
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* We do not have any private or other attrs.
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*/
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+ struct transport_container conn_cont;
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+ struct class_device_attribute *conn_attrs[ISCSI_CONN_ATTRS + 1];
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+ struct transport_container session_cont;
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struct class_device_attribute *session_attrs[ISCSI_SESSION_ATTRS + 1];
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- struct class_device_attribute *host_attrs[ISCSI_HOST_ATTRS + 1];
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};
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-#define to_iscsi_internal(tmpl) container_of(tmpl, struct iscsi_internal, t)
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+/*
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+ * list of registered transports and lock that must
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+ * be held while accessing list. The iscsi_transport_lock must
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+ * be acquired after the rx_queue_sema.
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+ */
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+static LIST_HEAD(iscsi_transports);
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+static DEFINE_SPINLOCK(iscsi_transport_lock);
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+
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+#define to_iscsi_internal(tmpl) \
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+ container_of(tmpl, struct iscsi_internal, t)
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+
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+#define cdev_to_iscsi_internal(_cdev) \
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+ container_of(_cdev, struct iscsi_internal, cdev)
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+
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+static void iscsi_transport_release(struct class_device *cdev)
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+{
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+ struct iscsi_internal *priv = cdev_to_iscsi_internal(cdev);
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+ kfree(priv);
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+}
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-static DECLARE_TRANSPORT_CLASS(iscsi_transport_class,
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- "iscsi_transport",
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+/*
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+ * iscsi_transport_class represents the iscsi_transports that are
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+ * registered.
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+ */
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+static struct class iscsi_transport_class = {
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+ .name = "iscsi_transport",
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+ .release = iscsi_transport_release,
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+};
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+
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+static ssize_t
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+show_transport_handle(struct class_device *cdev, char *buf)
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+{
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+ struct iscsi_internal *priv = cdev_to_iscsi_internal(cdev);
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+ return sprintf(buf, "%llu", iscsi_handle(priv->iscsi_transport));
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+}
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+static CLASS_DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
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+
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+#define show_transport_attr(name, format) \
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+static ssize_t \
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+show_transport_##name(struct class_device *cdev, char *buf) \
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+{ \
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+ struct iscsi_internal *priv = cdev_to_iscsi_internal(cdev); \
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+ return sprintf(buf, format"\n", priv->iscsi_transport->name); \
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+} \
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+static CLASS_DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
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+
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+show_transport_attr(caps, "0x%x");
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+show_transport_attr(max_lun, "%d");
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+show_transport_attr(max_conn, "%d");
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+show_transport_attr(max_cmd_len, "%d");
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+
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+static struct attribute *iscsi_transport_attrs[] = {
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+ &class_device_attr_handle.attr,
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+ &class_device_attr_caps.attr,
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+ &class_device_attr_max_lun.attr,
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+ &class_device_attr_max_conn.attr,
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+ &class_device_attr_max_cmd_len.attr,
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+ NULL,
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+};
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+
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+static struct attribute_group iscsi_transport_group = {
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+ .attrs = iscsi_transport_attrs,
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+};
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+
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+static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
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+ "iscsi_session",
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NULL,
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NULL,
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NULL);
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-static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
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- "iscsi_host",
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+static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
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+ "iscsi_connection",
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NULL,
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NULL,
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NULL);
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+
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+static struct sock *nls;
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+static int daemon_pid;
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+static DECLARE_MUTEX(rx_queue_sema);
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+
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+struct mempool_zone {
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+ mempool_t *pool;
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+ atomic_t allocated;
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+ int size;
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+ int hiwat;
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+ struct list_head freequeue;
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+ spinlock_t freelock;
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+};
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+
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+static struct mempool_zone z_reply;
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+
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/*
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- * iSCSI target and session attrs
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+ * Z_MAX_* - actual mempool size allocated at the mempool_zone_init() time
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+ * Z_HIWAT_* - zone's high watermark when if_error bit will be set to -ENOMEM
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+ * so daemon will notice OOM on NETLINK tranposrt level and will
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+ * be able to predict or change operational behavior
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*/
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-#define iscsi_session_show_fn(field, format) \
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- \
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-static ssize_t \
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-show_session_##field(struct class_device *cdev, char *buf) \
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-{ \
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- struct scsi_target *starget = transport_class_to_starget(cdev); \
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- struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
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- struct iscsi_internal *i = to_iscsi_internal(shost->transportt); \
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- \
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- if (i->fnt->get_##field) \
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- i->fnt->get_##field(starget); \
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- return snprintf(buf, 20, format"\n", iscsi_##field(starget)); \
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+#define Z_MAX_REPLY 8
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+#define Z_HIWAT_REPLY 6
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+#define Z_MAX_PDU 8
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+#define Z_HIWAT_PDU 6
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+#define Z_MAX_ERROR 16
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+#define Z_HIWAT_ERROR 12
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+
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+struct iscsi_if_conn {
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+ struct list_head conn_list; /* item in connlist */
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+ struct list_head session_list; /* item in session->connections */
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+ iscsi_connh_t connh;
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+ int active; /* must be accessed with the connlock */
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+ struct Scsi_Host *host; /* originated shost */
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+ struct device dev; /* sysfs transport/container device */
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+ struct iscsi_transport *transport;
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+ struct mempool_zone z_error;
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+ struct mempool_zone z_pdu;
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+ struct list_head freequeue;
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+};
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+
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+#define iscsi_dev_to_if_conn(_dev) \
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+ container_of(_dev, struct iscsi_if_conn, dev)
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+
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+#define iscsi_cdev_to_if_conn(_cdev) \
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+ iscsi_dev_to_if_conn(_cdev->dev)
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+
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+static LIST_HEAD(connlist);
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+static DEFINE_SPINLOCK(connlock);
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+
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+struct iscsi_if_session {
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+ struct list_head list; /* item in session_list */
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+ struct list_head connections;
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+ iscsi_sessionh_t sessionh;
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+ struct iscsi_transport *transport;
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+ struct device dev; /* sysfs transport/container device */
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+};
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+
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+#define iscsi_dev_to_if_session(_dev) \
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+ container_of(_dev, struct iscsi_if_session, dev)
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+
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+#define iscsi_cdev_to_if_session(_cdev) \
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+ iscsi_dev_to_if_session(_cdev->dev)
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+
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+#define iscsi_if_session_to_shost(_session) \
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+ dev_to_shost(_session->dev.parent)
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+
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+static struct iscsi_if_conn*
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+iscsi_if_find_conn(uint64_t key)
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+{
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+ unsigned long flags;
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+ struct iscsi_if_conn *conn;
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+
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+ spin_lock_irqsave(&connlock, flags);
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+ list_for_each_entry(conn, &connlist, conn_list)
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+ if (conn->connh == key) {
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+ spin_unlock_irqrestore(&connlock, flags);
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+ return conn;
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+ }
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+ spin_unlock_irqrestore(&connlock, flags);
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+ return NULL;
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}
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-#define iscsi_session_rd_attr(field, format) \
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- iscsi_session_show_fn(field, format) \
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-static CLASS_DEVICE_ATTR(field, S_IRUGO, show_session_##field, NULL);
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+static struct iscsi_internal *
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+iscsi_if_transport_lookup(struct iscsi_transport *tt)
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+{
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+ struct iscsi_internal *priv;
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+ unsigned long flags;
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+
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+ spin_lock_irqsave(&iscsi_transport_lock, flags);
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+ list_for_each_entry(priv, &iscsi_transports, list) {
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+ if (tt == priv->iscsi_transport) {
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+ spin_unlock_irqrestore(&iscsi_transport_lock, flags);
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+ return priv;
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+ }
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+ }
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+ spin_unlock_irqrestore(&iscsi_transport_lock, flags);
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+ return NULL;
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+}
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-iscsi_session_rd_attr(tpgt, "%hu");
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-iscsi_session_rd_attr(tsih, "%2x");
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-iscsi_session_rd_attr(max_recv_data_segment_len, "%u");
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-iscsi_session_rd_attr(max_burst_len, "%u");
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-iscsi_session_rd_attr(first_burst_len, "%u");
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-iscsi_session_rd_attr(def_time2wait, "%hu");
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-iscsi_session_rd_attr(def_time2retain, "%hu");
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-iscsi_session_rd_attr(max_outstanding_r2t, "%hu");
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-iscsi_session_rd_attr(erl, "%d");
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+static inline struct list_head *skb_to_lh(struct sk_buff *skb)
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+{
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+ return (struct list_head *)&skb->cb;
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+}
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+static void*
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+mempool_zone_alloc_skb(unsigned int gfp_mask, void *pool_data)
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+{
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+ struct mempool_zone *zone = pool_data;
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-#define iscsi_session_show_bool_fn(field) \
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- \
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-static ssize_t \
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-show_session_bool_##field(struct class_device *cdev, char *buf) \
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-{ \
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- struct scsi_target *starget = transport_class_to_starget(cdev); \
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- struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
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- struct iscsi_internal *i = to_iscsi_internal(shost->transportt); \
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- \
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- if (i->fnt->get_##field) \
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- i->fnt->get_##field(starget); \
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- \
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- if (iscsi_##field(starget)) \
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- return sprintf(buf, "Yes\n"); \
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- return sprintf(buf, "No\n"); \
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+ return alloc_skb(zone->size, gfp_mask);
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}
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-#define iscsi_session_rd_bool_attr(field) \
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- iscsi_session_show_bool_fn(field) \
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-static CLASS_DEVICE_ATTR(field, S_IRUGO, show_session_bool_##field, NULL);
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+static void
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+mempool_zone_free_skb(void *element, void *pool_data)
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+{
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+ kfree_skb(element);
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+}
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-iscsi_session_rd_bool_attr(initial_r2t);
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-iscsi_session_rd_bool_attr(immediate_data);
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-iscsi_session_rd_bool_attr(data_pdu_in_order);
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-iscsi_session_rd_bool_attr(data_sequence_in_order);
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+static void
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+mempool_zone_complete(struct mempool_zone *zone)
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+{
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+ unsigned long flags;
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+ struct list_head *lh, *n;
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-#define iscsi_session_show_digest_fn(field) \
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- \
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-static ssize_t \
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-show_##field(struct class_device *cdev, char *buf) \
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-{ \
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- struct scsi_target *starget = transport_class_to_starget(cdev); \
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- struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
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- struct iscsi_internal *i = to_iscsi_internal(shost->transportt); \
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- \
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- if (i->fnt->get_##field) \
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- i->fnt->get_##field(starget); \
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- \
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- if (iscsi_##field(starget)) \
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- return sprintf(buf, "CRC32C\n"); \
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- return sprintf(buf, "None\n"); \
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+ spin_lock_irqsave(&zone->freelock, flags);
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+ list_for_each_safe(lh, n, &zone->freequeue) {
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+ struct sk_buff *skb = (struct sk_buff *)((char *)lh -
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+ offsetof(struct sk_buff, cb));
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+ if (!skb_shared(skb)) {
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+ list_del(skb_to_lh(skb));
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+ mempool_free(skb, zone->pool);
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+ atomic_dec(&zone->allocated);
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+ }
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+ }
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+ spin_unlock_irqrestore(&zone->freelock, flags);
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}
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-#define iscsi_session_rd_digest_attr(field) \
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- iscsi_session_show_digest_fn(field) \
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-static CLASS_DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);
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+static int
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+mempool_zone_init(struct mempool_zone *zp, unsigned max, unsigned size,
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+ unsigned hiwat)
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+{
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+ zp->pool = mempool_create(max, mempool_zone_alloc_skb,
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+ mempool_zone_free_skb, zp);
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+ if (!zp->pool)
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+ return -ENOMEM;
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-iscsi_session_rd_digest_attr(header_digest);
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-iscsi_session_rd_digest_attr(data_digest);
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+ zp->size = size;
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+ zp->hiwat = hiwat;
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-static ssize_t
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-show_port(struct class_device *cdev, char *buf)
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+ INIT_LIST_HEAD(&zp->freequeue);
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+ spin_lock_init(&zp->freelock);
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+ atomic_set(&zp->allocated, 0);
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+
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+ return 0;
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+}
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+
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+
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+static struct sk_buff*
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+mempool_zone_get_skb(struct mempool_zone *zone)
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{
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- struct scsi_target *starget = transport_class_to_starget(cdev);
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- struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
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- struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
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+ struct sk_buff *skb;
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+
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+ skb = mempool_alloc(zone->pool, GFP_ATOMIC);
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+ if (skb)
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+ atomic_inc(&zone->allocated);
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+ return skb;
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+}
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- if (i->fnt->get_port)
|
|
|
- i->fnt->get_port(starget);
|
|
|
+static int
|
|
|
+iscsi_unicast_skb(struct mempool_zone *zone, struct sk_buff *skb)
|
|
|
+{
|
|
|
+ unsigned long flags;
|
|
|
+ int rc;
|
|
|
|
|
|
- return snprintf(buf, 20, "%hu\n", ntohs(iscsi_port(starget)));
|
|
|
+ skb_get(skb);
|
|
|
+ rc = netlink_unicast(nls, skb, daemon_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);
|
|
|
+ list_add(skb_to_lh(skb), &zone->freequeue);
|
|
|
+ spin_unlock_irqrestore(&zone->freelock, flags);
|
|
|
+
|
|
|
+ return 0;
|
|
|
}
|
|
|
-static CLASS_DEVICE_ATTR(port, S_IRUGO, show_port, NULL);
|
|
|
|
|
|
-static ssize_t
|
|
|
-show_ip_address(struct class_device *cdev, char *buf)
|
|
|
+int iscsi_recv_pdu(iscsi_connh_t connh, struct iscsi_hdr *hdr,
|
|
|
+ char *data, uint32_t data_size)
|
|
|
{
|
|
|
- struct scsi_target *starget = transport_class_to_starget(cdev);
|
|
|
- struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
|
|
|
- struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
|
|
|
+ struct nlmsghdr *nlh;
|
|
|
+ struct sk_buff *skb;
|
|
|
+ struct iscsi_uevent *ev;
|
|
|
+ struct iscsi_if_conn *conn;
|
|
|
+ char *pdu;
|
|
|
+ int len = NLMSG_SPACE(sizeof(*ev) + sizeof(struct iscsi_hdr) +
|
|
|
+ data_size);
|
|
|
+
|
|
|
+ conn = iscsi_if_find_conn(connh);
|
|
|
+ BUG_ON(!conn);
|
|
|
+
|
|
|
+ mempool_zone_complete(&conn->z_pdu);
|
|
|
+
|
|
|
+ skb = mempool_zone_get_skb(&conn->z_pdu);
|
|
|
+ if (!skb) {
|
|
|
+ iscsi_conn_error(connh, ISCSI_ERR_CONN_FAILED);
|
|
|
+ printk(KERN_ERR "iscsi%d: can not deliver control PDU: OOM\n",
|
|
|
+ conn->host->host_no);
|
|
|
+ return -ENOMEM;
|
|
|
+ }
|
|
|
|
|
|
- if (i->fnt->get_ip_address)
|
|
|
- i->fnt->get_ip_address(starget);
|
|
|
+ nlh = __nlmsg_put(skb, 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.conn_handle = connh;
|
|
|
+ pdu = (char*)ev + sizeof(*ev);
|
|
|
+ memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
|
|
|
+ memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
|
|
|
|
|
|
- if (iscsi_addr_type(starget) == AF_INET)
|
|
|
- return sprintf(buf, "%u.%u.%u.%u\n",
|
|
|
- NIPQUAD(iscsi_sin_addr(starget)));
|
|
|
- else if(iscsi_addr_type(starget) == AF_INET6)
|
|
|
- return sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
|
|
|
- NIP6(iscsi_sin6_addr(starget)));
|
|
|
- return -EINVAL;
|
|
|
+ return iscsi_unicast_skb(&conn->z_pdu, skb);
|
|
|
}
|
|
|
-static CLASS_DEVICE_ATTR(ip_address, S_IRUGO, show_ip_address, NULL);
|
|
|
+EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
|
|
|
|
|
|
-static ssize_t
|
|
|
-show_isid(struct class_device *cdev, char *buf)
|
|
|
+void iscsi_conn_error(iscsi_connh_t connh, enum iscsi_err error)
|
|
|
{
|
|
|
- struct scsi_target *starget = transport_class_to_starget(cdev);
|
|
|
- struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
|
|
|
- struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
|
|
|
+ struct nlmsghdr *nlh;
|
|
|
+ struct sk_buff *skb;
|
|
|
+ struct iscsi_uevent *ev;
|
|
|
+ struct iscsi_if_conn *conn;
|
|
|
+ int len = NLMSG_SPACE(sizeof(*ev));
|
|
|
+
|
|
|
+ conn = iscsi_if_find_conn(connh);
|
|
|
+ BUG_ON(!conn);
|
|
|
+
|
|
|
+ mempool_zone_complete(&conn->z_error);
|
|
|
+
|
|
|
+ skb = mempool_zone_get_skb(&conn->z_error);
|
|
|
+ if (!skb) {
|
|
|
+ printk(KERN_ERR "iscsi%d: gracefully ignored conn error (%d)\n",
|
|
|
+ conn->host->host_no, error);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ nlh = __nlmsg_put(skb, 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.conn_handle = connh;
|
|
|
|
|
|
- if (i->fnt->get_isid)
|
|
|
- i->fnt->get_isid(starget);
|
|
|
+ iscsi_unicast_skb(&conn->z_error, skb);
|
|
|
|
|
|
- return sprintf(buf, "%02x%02x%02x%02x%02x%02x\n",
|
|
|
- iscsi_isid(starget)[0], iscsi_isid(starget)[1],
|
|
|
- iscsi_isid(starget)[2], iscsi_isid(starget)[3],
|
|
|
- iscsi_isid(starget)[4], iscsi_isid(starget)[5]);
|
|
|
+ printk(KERN_INFO "iscsi%d: detected conn error (%d)\n",
|
|
|
+ conn->host->host_no, error);
|
|
|
+}
|
|
|
+EXPORT_SYMBOL_GPL(iscsi_conn_error);
|
|
|
+
|
|
|
+static int
|
|
|
+iscsi_if_send_reply(int pid, int seq, int type, int done, int multi,
|
|
|
+ void *payload, int size)
|
|
|
+{
|
|
|
+ struct sk_buff *skb;
|
|
|
+ struct nlmsghdr *nlh;
|
|
|
+ int len = NLMSG_SPACE(size);
|
|
|
+ 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);
|
|
|
+
|
|
|
+ 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);
|
|
|
}
|
|
|
-static CLASS_DEVICE_ATTR(isid, S_IRUGO, show_isid, NULL);
|
|
|
|
|
|
/*
|
|
|
- * This is used for iSCSI names. Normally, we follow
|
|
|
- * the transport class convention of having the lld
|
|
|
- * set the field, but in these cases the value is
|
|
|
- * too large.
|
|
|
+ * iSCSI Session's hostdata organization:
|
|
|
+ *
|
|
|
+ * *------------------* <== host->hostdata
|
|
|
+ * | transport |
|
|
|
+ * |------------------| <== iscsi_hostdata(host->hostdata)
|
|
|
+ * | transport's data |
|
|
|
+ * |------------------| <== hostdata_session(host->hostdata)
|
|
|
+ * | interface's data |
|
|
|
+ * *------------------*
|
|
|
*/
|
|
|
-#define iscsi_session_show_str_fn(field) \
|
|
|
- \
|
|
|
-static ssize_t \
|
|
|
-show_session_str_##field(struct class_device *cdev, char *buf) \
|
|
|
-{ \
|
|
|
- ssize_t ret = 0; \
|
|
|
- struct scsi_target *starget = transport_class_to_starget(cdev); \
|
|
|
- struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
|
|
|
- struct iscsi_internal *i = to_iscsi_internal(shost->transportt); \
|
|
|
- \
|
|
|
- if (i->fnt->get_##field) \
|
|
|
- ret = i->fnt->get_##field(starget, buf, PAGE_SIZE); \
|
|
|
- return ret; \
|
|
|
+
|
|
|
+#define hostdata_privsize(_t) (sizeof(unsigned long) + _t->hostdata_size + \
|
|
|
+ _t->hostdata_size % sizeof(unsigned long) + \
|
|
|
+ sizeof(struct iscsi_if_session))
|
|
|
+
|
|
|
+#define hostdata_session(_hostdata) ((void*)_hostdata + sizeof(unsigned long) + \
|
|
|
+ ((struct iscsi_transport *) \
|
|
|
+ iscsi_ptr(*(uint64_t *)_hostdata))->hostdata_size)
|
|
|
+
|
|
|
+static void iscsi_if_session_dev_release(struct device *dev)
|
|
|
+{
|
|
|
+ struct iscsi_if_session *session = iscsi_dev_to_if_session(dev);
|
|
|
+ struct iscsi_transport *transport = session->transport;
|
|
|
+ struct Scsi_Host *shost = iscsi_if_session_to_shost(session);
|
|
|
+ struct iscsi_if_conn *conn, *tmp;
|
|
|
+ unsigned long flags;
|
|
|
+
|
|
|
+ /* now free connections */
|
|
|
+ spin_lock_irqsave(&connlock, flags);
|
|
|
+ list_for_each_entry_safe(conn, tmp, &session->connections,
|
|
|
+ session_list) {
|
|
|
+ list_del(&conn->session_list);
|
|
|
+ mempool_destroy(conn->z_pdu.pool);
|
|
|
+ mempool_destroy(conn->z_error.pool);
|
|
|
+ kfree(conn);
|
|
|
+ }
|
|
|
+ spin_unlock_irqrestore(&connlock, flags);
|
|
|
+ scsi_host_put(shost);
|
|
|
+ module_put(transport->owner);
|
|
|
+}
|
|
|
+
|
|
|
+static int
|
|
|
+iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_uevent *ev)
|
|
|
+{
|
|
|
+ struct iscsi_transport *transport = priv->iscsi_transport;
|
|
|
+ struct iscsi_if_session *session;
|
|
|
+ struct Scsi_Host *shost;
|
|
|
+ unsigned long flags;
|
|
|
+ int error;
|
|
|
+
|
|
|
+ if (!try_module_get(transport->owner))
|
|
|
+ return -EPERM;
|
|
|
+
|
|
|
+ shost = scsi_host_alloc(transport->host_template,
|
|
|
+ hostdata_privsize(transport));
|
|
|
+ if (!shost) {
|
|
|
+ ev->r.c_session_ret.session_handle = iscsi_handle(NULL);
|
|
|
+ printk(KERN_ERR "iscsi: can not allocate SCSI host for "
|
|
|
+ "session\n");
|
|
|
+ error = -ENOMEM;
|
|
|
+ goto out_module_put;
|
|
|
+ }
|
|
|
+ shost->max_id = 1;
|
|
|
+ shost->max_channel = 0;
|
|
|
+ shost->max_lun = transport->max_lun;
|
|
|
+ shost->max_cmd_len = transport->max_cmd_len;
|
|
|
+ shost->transportt = &priv->t;
|
|
|
+
|
|
|
+ /* store struct iscsi_transport in hostdata */
|
|
|
+ *(uint64_t*)shost->hostdata = ev->transport_handle;
|
|
|
+
|
|
|
+ ev->r.c_session_ret.session_handle = transport->create_session(
|
|
|
+ ev->u.c_session.initial_cmdsn, shost);
|
|
|
+ if (ev->r.c_session_ret.session_handle == iscsi_handle(NULL)) {
|
|
|
+ error = 0;
|
|
|
+ goto out_host_put;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* host_no becomes assigned SID */
|
|
|
+ ev->r.c_session_ret.sid = shost->host_no;
|
|
|
+ /* initialize session */
|
|
|
+ session = hostdata_session(shost->hostdata);
|
|
|
+ INIT_LIST_HEAD(&session->connections);
|
|
|
+ INIT_LIST_HEAD(&session->list);
|
|
|
+ session->sessionh = ev->r.c_session_ret.session_handle;
|
|
|
+ session->transport = transport;
|
|
|
+
|
|
|
+ error = scsi_add_host(shost, NULL);
|
|
|
+ if (error)
|
|
|
+ goto out_destroy_session;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * this is released in the dev's release function)
|
|
|
+ */
|
|
|
+ scsi_host_get(shost);
|
|
|
+ snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u", shost->host_no);
|
|
|
+ session->dev.parent = &shost->shost_gendev;
|
|
|
+ session->dev.release = iscsi_if_session_dev_release;
|
|
|
+ error = device_register(&session->dev);
|
|
|
+ if (error) {
|
|
|
+ printk(KERN_ERR "iscsi: could not register session%d's dev\n",
|
|
|
+ shost->host_no);
|
|
|
+ goto out_remove_host;
|
|
|
+ }
|
|
|
+ transport_register_device(&session->dev);
|
|
|
+
|
|
|
+ /* add this session to the list of active sessions */
|
|
|
+ spin_lock_irqsave(&priv->session_lock, flags);
|
|
|
+ list_add(&session->list, &priv->sessions);
|
|
|
+ spin_unlock_irqrestore(&priv->session_lock, flags);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+
|
|
|
+out_remove_host:
|
|
|
+ scsi_remove_host(shost);
|
|
|
+out_destroy_session:
|
|
|
+ transport->destroy_session(ev->r.c_session_ret.session_handle);
|
|
|
+ ev->r.c_session_ret.session_handle = iscsi_handle(NULL);
|
|
|
+out_host_put:
|
|
|
+ scsi_host_put(shost);
|
|
|
+out_module_put:
|
|
|
+ module_put(transport->owner);
|
|
|
+ return error;
|
|
|
+}
|
|
|
+
|
|
|
+static int
|
|
|
+iscsi_if_destroy_session(struct iscsi_internal *priv, struct iscsi_uevent *ev)
|
|
|
+{
|
|
|
+ struct iscsi_transport *transport = priv->iscsi_transport;
|
|
|
+ struct Scsi_Host *shost;
|
|
|
+ struct iscsi_if_session *session;
|
|
|
+ unsigned long flags;
|
|
|
+ struct iscsi_if_conn *conn;
|
|
|
+ int error = 0;
|
|
|
+
|
|
|
+ shost = scsi_host_lookup(ev->u.d_session.sid);
|
|
|
+ if (shost == ERR_PTR(-ENXIO))
|
|
|
+ return -EEXIST;
|
|
|
+ session = hostdata_session(shost->hostdata);
|
|
|
+
|
|
|
+ /* check if we have active connections */
|
|
|
+ spin_lock_irqsave(&connlock, flags);
|
|
|
+ list_for_each_entry(conn, &session->connections, session_list) {
|
|
|
+ if (conn->active) {
|
|
|
+ printk(KERN_ERR "iscsi%d: can not destroy session: "
|
|
|
+ "has active connection (%p)\n",
|
|
|
+ shost->host_no, iscsi_ptr(conn->connh));
|
|
|
+ spin_unlock_irqrestore(&connlock, flags);
|
|
|
+ error = EIO;
|
|
|
+ goto out_release_ref;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ spin_unlock_irqrestore(&connlock, flags);
|
|
|
+
|
|
|
+ scsi_remove_host(shost);
|
|
|
+ transport->destroy_session(ev->u.d_session.session_handle);
|
|
|
+ transport_unregister_device(&session->dev);
|
|
|
+ device_unregister(&session->dev);
|
|
|
+
|
|
|
+ /* remove this session from the list of active sessions */
|
|
|
+ spin_lock_irqsave(&priv->session_lock, flags);
|
|
|
+ list_del(&session->list);
|
|
|
+ spin_unlock_irqrestore(&priv->session_lock, flags);
|
|
|
+
|
|
|
+ /* ref from host alloc */
|
|
|
+ scsi_host_put(shost);
|
|
|
+out_release_ref:
|
|
|
+ /* ref from host lookup */
|
|
|
+ scsi_host_put(shost);
|
|
|
+ return error;
|
|
|
+}
|
|
|
+
|
|
|
+static void iscsi_if_conn_dev_release(struct device *dev)
|
|
|
+{
|
|
|
+ struct iscsi_if_conn *conn = iscsi_dev_to_if_conn(dev);
|
|
|
+ struct Scsi_Host *shost = conn->host;
|
|
|
+
|
|
|
+ scsi_host_put(shost);
|
|
|
+}
|
|
|
+
|
|
|
+static int
|
|
|
+iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
|
|
|
+{
|
|
|
+ struct iscsi_if_session *session;
|
|
|
+ struct Scsi_Host *shost;
|
|
|
+ struct iscsi_if_conn *conn;
|
|
|
+ unsigned long flags;
|
|
|
+ int error;
|
|
|
+
|
|
|
+ shost = scsi_host_lookup(ev->u.c_conn.sid);
|
|
|
+ if (shost == ERR_PTR(-ENXIO))
|
|
|
+ return -EEXIST;
|
|
|
+ session = hostdata_session(shost->hostdata);
|
|
|
+
|
|
|
+ conn = kmalloc(sizeof(struct iscsi_if_conn), GFP_KERNEL);
|
|
|
+ if (!conn) {
|
|
|
+ error = -ENOMEM;
|
|
|
+ goto out_release_ref;
|
|
|
+ }
|
|
|
+ memset(conn, 0, sizeof(struct iscsi_if_conn));
|
|
|
+ INIT_LIST_HEAD(&conn->session_list);
|
|
|
+ INIT_LIST_HEAD(&conn->conn_list);
|
|
|
+ conn->host = shost;
|
|
|
+ conn->transport = transport;
|
|
|
+
|
|
|
+ error = mempool_zone_init(&conn->z_pdu, Z_MAX_PDU,
|
|
|
+ NLMSG_SPACE(sizeof(struct iscsi_uevent) +
|
|
|
+ sizeof(struct iscsi_hdr) +
|
|
|
+ DEFAULT_MAX_RECV_DATA_SEGMENT_LENGTH),
|
|
|
+ Z_HIWAT_PDU);
|
|
|
+ if (error) {
|
|
|
+ printk(KERN_ERR "iscsi%d: can not allocate pdu zone for new "
|
|
|
+ "conn\n", shost->host_no);
|
|
|
+ goto out_free_conn;
|
|
|
+ }
|
|
|
+ error = mempool_zone_init(&conn->z_error, Z_MAX_ERROR,
|
|
|
+ NLMSG_SPACE(sizeof(struct iscsi_uevent)),
|
|
|
+ Z_HIWAT_ERROR);
|
|
|
+ if (error) {
|
|
|
+ printk(KERN_ERR "iscsi%d: can not allocate error zone for "
|
|
|
+ "new conn\n", shost->host_no);
|
|
|
+ goto out_free_pdu_pool;
|
|
|
+ }
|
|
|
+
|
|
|
+ ev->r.handle = transport->create_conn(ev->u.c_conn.session_handle,
|
|
|
+ ev->u.c_conn.cid);
|
|
|
+ if (!ev->r.handle) {
|
|
|
+ error = -ENODEV;
|
|
|
+ goto out_free_error_pool;
|
|
|
+ }
|
|
|
+
|
|
|
+ conn->connh = ev->r.handle;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * this is released in the dev's release function
|
|
|
+ */
|
|
|
+ if (!scsi_host_get(shost))
|
|
|
+ goto out_destroy_conn;
|
|
|
+ snprintf(conn->dev.bus_id, BUS_ID_SIZE, "connection%d:%u",
|
|
|
+ shost->host_no, ev->u.c_conn.cid);
|
|
|
+ conn->dev.parent = &session->dev;
|
|
|
+ conn->dev.release = iscsi_if_conn_dev_release;
|
|
|
+ error = device_register(&conn->dev);
|
|
|
+ if (error) {
|
|
|
+ printk(KERN_ERR "iscsi%d: could not register connections%u "
|
|
|
+ "dev\n", shost->host_no, ev->u.c_conn.cid);
|
|
|
+ goto out_release_parent_ref;
|
|
|
+ }
|
|
|
+ transport_register_device(&conn->dev);
|
|
|
+
|
|
|
+ spin_lock_irqsave(&connlock, flags);
|
|
|
+ list_add(&conn->conn_list, &connlist);
|
|
|
+ list_add(&conn->session_list, &session->connections);
|
|
|
+ conn->active = 1;
|
|
|
+ spin_unlock_irqrestore(&connlock, flags);
|
|
|
+
|
|
|
+ scsi_host_put(shost);
|
|
|
+ return 0;
|
|
|
+
|
|
|
+out_release_parent_ref:
|
|
|
+ scsi_host_put(shost);
|
|
|
+out_destroy_conn:
|
|
|
+ transport->destroy_conn(ev->r.handle);
|
|
|
+out_free_error_pool:
|
|
|
+ mempool_destroy(conn->z_error.pool);
|
|
|
+out_free_pdu_pool:
|
|
|
+ mempool_destroy(conn->z_pdu.pool);
|
|
|
+out_free_conn:
|
|
|
+ kfree(conn);
|
|
|
+out_release_ref:
|
|
|
+ scsi_host_put(shost);
|
|
|
+ return error;
|
|
|
}
|
|
|
|
|
|
-#define iscsi_session_rd_str_attr(field) \
|
|
|
- iscsi_session_show_str_fn(field) \
|
|
|
-static CLASS_DEVICE_ATTR(field, S_IRUGO, show_session_str_##field, NULL);
|
|
|
+static int
|
|
|
+iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
|
|
|
+{
|
|
|
+ unsigned long flags;
|
|
|
+ struct iscsi_if_conn *conn;
|
|
|
+
|
|
|
+ conn = iscsi_if_find_conn(ev->u.d_conn.conn_handle);
|
|
|
+ if (!conn)
|
|
|
+ return -EEXIST;
|
|
|
+
|
|
|
+ transport->destroy_conn(ev->u.d_conn.conn_handle);
|
|
|
+
|
|
|
+ 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;
|
|
|
+}
|
|
|
+
|
|
|
+static int
|
|
|
+iscsi_if_get_stats(struct iscsi_transport *transport, struct sk_buff *skb,
|
|
|
+ struct nlmsghdr *nlh)
|
|
|
+{
|
|
|
+ struct iscsi_uevent *ev = NLMSG_DATA(nlh);
|
|
|
+ struct iscsi_stats *stats;
|
|
|
+ struct sk_buff *skbstat;
|
|
|
+ struct iscsi_if_conn *conn;
|
|
|
+ struct nlmsghdr *nlhstat;
|
|
|
+ struct iscsi_uevent *evstat;
|
|
|
+ int len = NLMSG_SPACE(sizeof(*ev) +
|
|
|
+ sizeof(struct iscsi_stats) +
|
|
|
+ sizeof(struct iscsi_stats_custom) *
|
|
|
+ ISCSI_STATS_CUSTOM_MAX);
|
|
|
+ int err = 0;
|
|
|
+
|
|
|
+ conn = iscsi_if_find_conn(ev->u.get_stats.conn_handle);
|
|
|
+ if (!conn)
|
|
|
+ return -EEXIST;
|
|
|
+
|
|
|
+ do {
|
|
|
+ int actual_size;
|
|
|
+
|
|
|
+ mempool_zone_complete(&conn->z_pdu);
|
|
|
+
|
|
|
+ skbstat = mempool_zone_get_skb(&conn->z_pdu);
|
|
|
+ if (!skbstat) {
|
|
|
+ printk(KERN_ERR "iscsi%d: can not deliver stats: OOM\n",
|
|
|
+ conn->host->host_no);
|
|
|
+ return -ENOMEM;
|
|
|
+ }
|
|
|
+
|
|
|
+ nlhstat = __nlmsg_put(skbstat, 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.conn_handle =
|
|
|
+ ev->u.get_stats.conn_handle;
|
|
|
+ stats = (struct iscsi_stats *)
|
|
|
+ ((char*)evstat + sizeof(*evstat));
|
|
|
+ memset(stats, 0, sizeof(*stats));
|
|
|
+
|
|
|
+ transport->get_stats(ev->u.get_stats.conn_handle, stats);
|
|
|
+ actual_size = NLMSG_SPACE(sizeof(struct iscsi_uevent) +
|
|
|
+ sizeof(struct iscsi_stats) +
|
|
|
+ sizeof(struct iscsi_stats_custom) *
|
|
|
+ stats->custom_length);
|
|
|
+ actual_size -= sizeof(*nlhstat);
|
|
|
+ actual_size = NLMSG_LENGTH(actual_size);
|
|
|
+ skb_trim(skb, NLMSG_ALIGN(actual_size));
|
|
|
+ nlhstat->nlmsg_len = actual_size;
|
|
|
+
|
|
|
+ err = iscsi_unicast_skb(&conn->z_pdu, skbstat);
|
|
|
+ } while (err < 0 && err != -ECONNREFUSED);
|
|
|
+
|
|
|
+ return err;
|
|
|
+}
|
|
|
+
|
|
|
+static int
|
|
|
+iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
|
|
|
+{
|
|
|
+ int err = 0;
|
|
|
+ struct iscsi_uevent *ev = NLMSG_DATA(nlh);
|
|
|
+ struct iscsi_transport *transport = NULL;
|
|
|
+ struct iscsi_internal *priv;
|
|
|
+
|
|
|
+ if (NETLINK_CREDS(skb)->uid)
|
|
|
+ return -EPERM;
|
|
|
+
|
|
|
+ priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
|
|
|
+ if (!priv)
|
|
|
+ return -EINVAL;
|
|
|
+ transport = priv->iscsi_transport;
|
|
|
+
|
|
|
+ daemon_pid = NETLINK_CREDS(skb)->pid;
|
|
|
+
|
|
|
+ switch (nlh->nlmsg_type) {
|
|
|
+ case ISCSI_UEVENT_CREATE_SESSION:
|
|
|
+ err = iscsi_if_create_session(priv, ev);
|
|
|
+ break;
|
|
|
+ case ISCSI_UEVENT_DESTROY_SESSION:
|
|
|
+ err = iscsi_if_destroy_session(priv, ev);
|
|
|
+ break;
|
|
|
+ case ISCSI_UEVENT_CREATE_CONN:
|
|
|
+ err = iscsi_if_create_conn(transport, ev);
|
|
|
+ break;
|
|
|
+ case ISCSI_UEVENT_DESTROY_CONN:
|
|
|
+ err = iscsi_if_destroy_conn(transport, ev);
|
|
|
+ break;
|
|
|
+ case ISCSI_UEVENT_BIND_CONN:
|
|
|
+ if (!iscsi_if_find_conn(ev->u.b_conn.conn_handle))
|
|
|
+ return -EEXIST;
|
|
|
+ ev->r.retcode = transport->bind_conn(
|
|
|
+ ev->u.b_conn.session_handle,
|
|
|
+ ev->u.b_conn.conn_handle,
|
|
|
+ ev->u.b_conn.transport_fd,
|
|
|
+ ev->u.b_conn.is_leading);
|
|
|
+ break;
|
|
|
+ case ISCSI_UEVENT_SET_PARAM:
|
|
|
+ if (!iscsi_if_find_conn(ev->u.set_param.conn_handle))
|
|
|
+ return -EEXIST;
|
|
|
+ ev->r.retcode = transport->set_param(
|
|
|
+ ev->u.set_param.conn_handle,
|
|
|
+ ev->u.set_param.param, ev->u.set_param.value);
|
|
|
+ break;
|
|
|
+ case ISCSI_UEVENT_START_CONN:
|
|
|
+ if (!iscsi_if_find_conn(ev->u.start_conn.conn_handle))
|
|
|
+ return -EEXIST;
|
|
|
+ ev->r.retcode = transport->start_conn(
|
|
|
+ ev->u.start_conn.conn_handle);
|
|
|
+ break;
|
|
|
+ case ISCSI_UEVENT_STOP_CONN:
|
|
|
+ if (!iscsi_if_find_conn(ev->u.stop_conn.conn_handle))
|
|
|
+ return -EEXIST;
|
|
|
+ transport->stop_conn(ev->u.stop_conn.conn_handle,
|
|
|
+ ev->u.stop_conn.flag);
|
|
|
+ break;
|
|
|
+ case ISCSI_UEVENT_SEND_PDU:
|
|
|
+ if (!iscsi_if_find_conn(ev->u.send_pdu.conn_handle))
|
|
|
+ return -EEXIST;
|
|
|
+ ev->r.retcode = transport->send_pdu(
|
|
|
+ ev->u.send_pdu.conn_handle,
|
|
|
+ (struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
|
|
|
+ (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
|
|
|
+ ev->u.send_pdu.data_size);
|
|
|
+ break;
|
|
|
+ case ISCSI_UEVENT_GET_STATS:
|
|
|
+ err = iscsi_if_get_stats(transport, skb, nlh);
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ err = -EINVAL;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ return err;
|
|
|
+}
|
|
|
+
|
|
|
+/* Get message from skb (based on rtnetlink_rcv_skb). Each message is
|
|
|
+ * processed by iscsi_if_recv_msg. Malformed skbs with wrong length are
|
|
|
+ * discarded silently. */
|
|
|
+static void
|
|
|
+iscsi_if_rx(struct sock *sk, int len)
|
|
|
+{
|
|
|
+ struct sk_buff *skb;
|
|
|
|
|
|
-iscsi_session_rd_str_attr(target_name);
|
|
|
-iscsi_session_rd_str_attr(target_alias);
|
|
|
+ down(&rx_queue_sema);
|
|
|
+ while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
|
|
|
+ while (skb->len >= NLMSG_SPACE(0)) {
|
|
|
+ int err;
|
|
|
+ uint32_t rlen;
|
|
|
+ struct nlmsghdr *nlh;
|
|
|
+ struct iscsi_uevent *ev;
|
|
|
+
|
|
|
+ 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);
|
|
|
+ }
|
|
|
+ kfree_skb(skb);
|
|
|
+ }
|
|
|
+ up(&rx_queue_sema);
|
|
|
+}
|
|
|
|
|
|
/*
|
|
|
- * iSCSI host attrs
|
|
|
+ * iSCSI connection attrs
|
|
|
*/
|
|
|
+#define iscsi_conn_int_attr_show(param, format) \
|
|
|
+static ssize_t \
|
|
|
+show_conn_int_param_##param(struct class_device *cdev, char *buf) \
|
|
|
+{ \
|
|
|
+ uint32_t value = 0; \
|
|
|
+ struct iscsi_if_conn *conn = iscsi_cdev_to_if_conn(cdev); \
|
|
|
+ struct iscsi_internal *priv; \
|
|
|
+ \
|
|
|
+ priv = to_iscsi_internal(conn->host->transportt); \
|
|
|
+ if (priv->param_mask & (1 << param)) \
|
|
|
+ priv->iscsi_transport->get_param(conn->connh, param, &value); \
|
|
|
+ return snprintf(buf, 20, format"\n", value); \
|
|
|
+}
|
|
|
+
|
|
|
+#define iscsi_conn_int_attr(field, param, format) \
|
|
|
+ iscsi_conn_int_attr_show(param, format) \
|
|
|
+static CLASS_DEVICE_ATTR(field, S_IRUGO, show_conn_int_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");
|
|
|
|
|
|
/*
|
|
|
- * Again, this is used for iSCSI names. Normally, we follow
|
|
|
- * the transport class convention of having the lld set
|
|
|
- * the field, but in these cases the value is too large.
|
|
|
+ * iSCSI session attrs
|
|
|
*/
|
|
|
-#define iscsi_host_show_str_fn(field) \
|
|
|
- \
|
|
|
+#define iscsi_session_int_attr_show(param, format) \
|
|
|
static ssize_t \
|
|
|
-show_host_str_##field(struct class_device *cdev, char *buf) \
|
|
|
+show_session_int_param_##param(struct class_device *cdev, char *buf) \
|
|
|
{ \
|
|
|
- int ret = 0; \
|
|
|
- struct Scsi_Host *shost = transport_class_to_shost(cdev); \
|
|
|
- struct iscsi_internal *i = to_iscsi_internal(shost->transportt); \
|
|
|
+ uint32_t value = 0; \
|
|
|
+ struct iscsi_if_session *session = iscsi_cdev_to_if_session(cdev); \
|
|
|
+ struct Scsi_Host *shost = iscsi_if_session_to_shost(session); \
|
|
|
+ struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
|
|
|
+ struct iscsi_if_conn *conn = NULL; \
|
|
|
+ unsigned long flags; \
|
|
|
+ \
|
|
|
+ spin_lock_irqsave(&connlock, flags); \
|
|
|
+ if (!list_empty(&session->connections)) \
|
|
|
+ conn = list_entry(session->connections.next, \
|
|
|
+ struct iscsi_if_conn, session_list); \
|
|
|
+ spin_unlock_irqrestore(&connlock, flags); \
|
|
|
\
|
|
|
- if (i->fnt->get_##field) \
|
|
|
- ret = i->fnt->get_##field(shost, buf, PAGE_SIZE); \
|
|
|
- return ret; \
|
|
|
+ if (conn && (priv->param_mask & (1 << param))) \
|
|
|
+ priv->iscsi_transport->get_param(conn->connh, param, &value);\
|
|
|
+ return snprintf(buf, 20, format"\n", value); \
|
|
|
}
|
|
|
|
|
|
-#define iscsi_host_rd_str_attr(field) \
|
|
|
- iscsi_host_show_str_fn(field) \
|
|
|
-static CLASS_DEVICE_ATTR(field, S_IRUGO, show_host_str_##field, NULL);
|
|
|
+#define iscsi_session_int_attr(field, param, format) \
|
|
|
+ iscsi_session_int_attr_show(param, format) \
|
|
|
+static CLASS_DEVICE_ATTR(field, S_IRUGO, show_session_int_param_##param, NULL);
|
|
|
|
|
|
-iscsi_host_rd_str_attr(initiator_name);
|
|
|
-iscsi_host_rd_str_attr(initiator_alias);
|
|
|
+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");
|
|
|
|
|
|
-#define SETUP_SESSION_RD_ATTR(field) \
|
|
|
- if (i->fnt->show_##field) { \
|
|
|
- i->session_attrs[count] = &class_device_attr_##field; \
|
|
|
+#define SETUP_SESSION_RD_ATTR(field, param) \
|
|
|
+ if (priv->param_mask & (1 << param)) { \
|
|
|
+ priv->session_attrs[count] = &class_device_attr_##field;\
|
|
|
count++; \
|
|
|
}
|
|
|
|
|
|
-#define SETUP_HOST_RD_ATTR(field) \
|
|
|
- if (i->fnt->show_##field) { \
|
|
|
- i->host_attrs[count] = &class_device_attr_##field; \
|
|
|
+#define SETUP_CONN_RD_ATTR(field, param) \
|
|
|
+ if (priv->param_mask & (1 << param)) { \
|
|
|
+ priv->conn_attrs[count] = &class_device_attr_##field; \
|
|
|
count++; \
|
|
|
}
|
|
|
|
|
|
-static int iscsi_host_match(struct attribute_container *cont,
|
|
|
- struct device *dev)
|
|
|
+static int iscsi_is_session_dev(const struct device *dev)
|
|
|
+{
|
|
|
+ return dev->release == iscsi_if_session_dev_release;
|
|
|
+}
|
|
|
+
|
|
|
+static int iscsi_session_match(struct attribute_container *cont,
|
|
|
+ struct device *dev)
|
|
|
{
|
|
|
+ struct iscsi_if_session *session;
|
|
|
struct Scsi_Host *shost;
|
|
|
- struct iscsi_internal *i;
|
|
|
+ struct iscsi_internal *priv;
|
|
|
+
|
|
|
+ if (!iscsi_is_session_dev(dev))
|
|
|
+ return 0;
|
|
|
|
|
|
- if (!scsi_is_host_device(dev))
|
|
|
+ session = iscsi_dev_to_if_session(dev);
|
|
|
+ shost = iscsi_if_session_to_shost(session);
|
|
|
+ if (!shost->transportt)
|
|
|
return 0;
|
|
|
|
|
|
- shost = dev_to_shost(dev);
|
|
|
- if (!shost->transportt || shost->transportt->host_attrs.ac.class
|
|
|
- != &iscsi_host_class.class)
|
|
|
+ priv = to_iscsi_internal(shost->transportt);
|
|
|
+ if (priv->session_cont.ac.class != &iscsi_session_class.class)
|
|
|
return 0;
|
|
|
|
|
|
- i = to_iscsi_internal(shost->transportt);
|
|
|
-
|
|
|
- return &i->t.host_attrs.ac == cont;
|
|
|
+ return &priv->session_cont.ac == cont;
|
|
|
}
|
|
|
|
|
|
-static int iscsi_target_match(struct attribute_container *cont,
|
|
|
- struct device *dev)
|
|
|
+static int iscsi_is_conn_dev(const struct device *dev)
|
|
|
{
|
|
|
+ return dev->release == iscsi_if_conn_dev_release;
|
|
|
+}
|
|
|
+
|
|
|
+static int iscsi_conn_match(struct attribute_container *cont,
|
|
|
+ struct device *dev)
|
|
|
+{
|
|
|
+ struct iscsi_if_conn *conn;
|
|
|
struct Scsi_Host *shost;
|
|
|
- struct iscsi_internal *i;
|
|
|
+ struct iscsi_internal *priv;
|
|
|
|
|
|
- if (!scsi_is_target_device(dev))
|
|
|
+ if (!iscsi_is_conn_dev(dev))
|
|
|
return 0;
|
|
|
|
|
|
- shost = dev_to_shost(dev->parent);
|
|
|
- if (!shost->transportt || shost->transportt->host_attrs.ac.class
|
|
|
- != &iscsi_host_class.class)
|
|
|
+ conn = iscsi_dev_to_if_conn(dev);
|
|
|
+ shost = conn->host;
|
|
|
+ if (!shost->transportt)
|
|
|
return 0;
|
|
|
|
|
|
- i = to_iscsi_internal(shost->transportt);
|
|
|
-
|
|
|
- return &i->t.target_attrs.ac == cont;
|
|
|
-}
|
|
|
-
|
|
|
-struct scsi_transport_template *
|
|
|
-iscsi_attach_transport(struct iscsi_function_template *fnt)
|
|
|
-{
|
|
|
- struct iscsi_internal *i = kmalloc(sizeof(struct iscsi_internal),
|
|
|
- GFP_KERNEL);
|
|
|
- int count = 0;
|
|
|
-
|
|
|
- if (unlikely(!i))
|
|
|
- return NULL;
|
|
|
-
|
|
|
- memset(i, 0, sizeof(struct iscsi_internal));
|
|
|
- i->fnt = fnt;
|
|
|
-
|
|
|
- i->t.target_attrs.ac.attrs = &i->session_attrs[0];
|
|
|
- i->t.target_attrs.ac.class = &iscsi_transport_class.class;
|
|
|
- i->t.target_attrs.ac.match = iscsi_target_match;
|
|
|
- transport_container_register(&i->t.target_attrs);
|
|
|
- i->t.target_size = sizeof(struct iscsi_class_session);
|
|
|
-
|
|
|
- SETUP_SESSION_RD_ATTR(tsih);
|
|
|
- SETUP_SESSION_RD_ATTR(isid);
|
|
|
- SETUP_SESSION_RD_ATTR(header_digest);
|
|
|
- SETUP_SESSION_RD_ATTR(data_digest);
|
|
|
- SETUP_SESSION_RD_ATTR(target_name);
|
|
|
- SETUP_SESSION_RD_ATTR(target_alias);
|
|
|
- SETUP_SESSION_RD_ATTR(port);
|
|
|
- SETUP_SESSION_RD_ATTR(tpgt);
|
|
|
- SETUP_SESSION_RD_ATTR(ip_address);
|
|
|
- SETUP_SESSION_RD_ATTR(initial_r2t);
|
|
|
- SETUP_SESSION_RD_ATTR(immediate_data);
|
|
|
- SETUP_SESSION_RD_ATTR(max_recv_data_segment_len);
|
|
|
- SETUP_SESSION_RD_ATTR(max_burst_len);
|
|
|
- SETUP_SESSION_RD_ATTR(first_burst_len);
|
|
|
- SETUP_SESSION_RD_ATTR(def_time2wait);
|
|
|
- SETUP_SESSION_RD_ATTR(def_time2retain);
|
|
|
- SETUP_SESSION_RD_ATTR(max_outstanding_r2t);
|
|
|
- SETUP_SESSION_RD_ATTR(data_pdu_in_order);
|
|
|
- SETUP_SESSION_RD_ATTR(data_sequence_in_order);
|
|
|
- SETUP_SESSION_RD_ATTR(erl);
|
|
|
+ priv = to_iscsi_internal(shost->transportt);
|
|
|
+ if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
|
|
|
+ return 0;
|
|
|
|
|
|
- BUG_ON(count > ISCSI_SESSION_ATTRS);
|
|
|
- i->session_attrs[count] = NULL;
|
|
|
+ return &priv->conn_cont.ac == cont;
|
|
|
+}
|
|
|
+
|
|
|
+int iscsi_register_transport(struct iscsi_transport *tt)
|
|
|
+{
|
|
|
+ struct iscsi_internal *priv;
|
|
|
+ unsigned long flags;
|
|
|
+ int count = 0, err;
|
|
|
+
|
|
|
+ BUG_ON(!tt);
|
|
|
+
|
|
|
+ priv = iscsi_if_transport_lookup(tt);
|
|
|
+ if (priv)
|
|
|
+ return -EEXIST;
|
|
|
+
|
|
|
+ priv = kmalloc(sizeof(*priv), GFP_KERNEL);
|
|
|
+ if (!priv)
|
|
|
+ return -ENOMEM;
|
|
|
+ memset(priv, 0, sizeof(*priv));
|
|
|
+ INIT_LIST_HEAD(&priv->list);
|
|
|
+ INIT_LIST_HEAD(&priv->sessions);
|
|
|
+ spin_lock_init(&priv->session_lock);
|
|
|
+ priv->iscsi_transport = tt;
|
|
|
+
|
|
|
+ priv->cdev.class = &iscsi_transport_class;
|
|
|
+ snprintf(priv->cdev.class_id, BUS_ID_SIZE, "%s", tt->name);
|
|
|
+ err = class_device_register(&priv->cdev);
|
|
|
+ if (err)
|
|
|
+ goto free_priv;
|
|
|
+
|
|
|
+ err = sysfs_create_group(&priv->cdev.kobj, &iscsi_transport_group);
|
|
|
+ if (err)
|
|
|
+ goto unregister_cdev;
|
|
|
+
|
|
|
+ /* setup parameters mask */
|
|
|
+ priv->param_mask = 0xFFFFFFFF;
|
|
|
+ if (!(tt->caps & CAP_MULTI_R2T))
|
|
|
+ priv->param_mask &= ~(1 << ISCSI_PARAM_MAX_R2T);
|
|
|
+ if (!(tt->caps & CAP_HDRDGST))
|
|
|
+ priv->param_mask &= ~(1 << ISCSI_PARAM_HDRDGST_EN);
|
|
|
+ if (!(tt->caps & CAP_DATADGST))
|
|
|
+ priv->param_mask &= ~(1 << ISCSI_PARAM_DATADGST_EN);
|
|
|
+ if (!(tt->caps & CAP_MARKERS)) {
|
|
|
+ priv->param_mask &= ~(1 << ISCSI_PARAM_IFMARKER_EN);
|
|
|
+ priv->param_mask &= ~(1 << ISCSI_PARAM_OFMARKER_EN);
|
|
|
+ }
|
|
|
|
|
|
- i->t.host_attrs.ac.attrs = &i->host_attrs[0];
|
|
|
- i->t.host_attrs.ac.class = &iscsi_host_class.class;
|
|
|
- i->t.host_attrs.ac.match = iscsi_host_match;
|
|
|
- transport_container_register(&i->t.host_attrs);
|
|
|
- i->t.host_size = 0;
|
|
|
+ /* connection parameters */
|
|
|
+ priv->conn_cont.ac.attrs = &priv->conn_attrs[0];
|
|
|
+ priv->conn_cont.ac.class = &iscsi_connection_class.class;
|
|
|
+ priv->conn_cont.ac.match = iscsi_conn_match;
|
|
|
+ transport_container_register(&priv->conn_cont);
|
|
|
|
|
|
+ SETUP_CONN_RD_ATTR(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
|
|
|
+ SETUP_CONN_RD_ATTR(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
|
|
|
+ SETUP_CONN_RD_ATTR(header_digest, ISCSI_PARAM_HDRDGST_EN);
|
|
|
+ SETUP_CONN_RD_ATTR(data_digest, ISCSI_PARAM_DATADGST_EN);
|
|
|
+ SETUP_CONN_RD_ATTR(ifmarker, ISCSI_PARAM_IFMARKER_EN);
|
|
|
+ SETUP_CONN_RD_ATTR(ofmarker, ISCSI_PARAM_OFMARKER_EN);
|
|
|
+
|
|
|
+ BUG_ON(count > ISCSI_CONN_ATTRS);
|
|
|
+ priv->conn_attrs[count] = NULL;
|
|
|
count = 0;
|
|
|
- SETUP_HOST_RD_ATTR(initiator_name);
|
|
|
- SETUP_HOST_RD_ATTR(initiator_alias);
|
|
|
|
|
|
- BUG_ON(count > ISCSI_HOST_ATTRS);
|
|
|
- i->host_attrs[count] = NULL;
|
|
|
+ /* session parameters */
|
|
|
+ priv->session_cont.ac.attrs = &priv->session_attrs[0];
|
|
|
+ priv->session_cont.ac.class = &iscsi_session_class.class;
|
|
|
+ priv->session_cont.ac.match = iscsi_session_match;
|
|
|
+ transport_container_register(&priv->session_cont);
|
|
|
+
|
|
|
+ SETUP_SESSION_RD_ATTR(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN);
|
|
|
+ SETUP_SESSION_RD_ATTR(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T);
|
|
|
+ SETUP_SESSION_RD_ATTR(immediate_data, ISCSI_PARAM_IMM_DATA_EN);
|
|
|
+ SETUP_SESSION_RD_ATTR(first_burst_len, ISCSI_PARAM_FIRST_BURST);
|
|
|
+ SETUP_SESSION_RD_ATTR(max_burst_len, ISCSI_PARAM_MAX_BURST);
|
|
|
+ SETUP_SESSION_RD_ATTR(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN);
|
|
|
+ SETUP_SESSION_RD_ATTR(data_seq_in_order,ISCSI_PARAM_DATASEQ_INORDER_EN)
|
|
|
+ SETUP_SESSION_RD_ATTR(erl, ISCSI_PARAM_ERL);
|
|
|
+
|
|
|
+ BUG_ON(count > ISCSI_SESSION_ATTRS);
|
|
|
+ priv->session_attrs[count] = NULL;
|
|
|
+
|
|
|
+ spin_lock_irqsave(&iscsi_transport_lock, flags);
|
|
|
+ list_add(&priv->list, &iscsi_transports);
|
|
|
+ spin_unlock_irqrestore(&iscsi_transport_lock, flags);
|
|
|
+
|
|
|
+ printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
|
|
|
+ return 0;
|
|
|
|
|
|
- return &i->t;
|
|
|
+unregister_cdev:
|
|
|
+ class_device_unregister(&priv->cdev);
|
|
|
+free_priv:
|
|
|
+ kfree(priv);
|
|
|
+ return err;
|
|
|
}
|
|
|
+EXPORT_SYMBOL_GPL(iscsi_register_transport);
|
|
|
+
|
|
|
+int iscsi_unregister_transport(struct iscsi_transport *tt)
|
|
|
+{
|
|
|
+ struct iscsi_internal *priv;
|
|
|
+ unsigned long flags;
|
|
|
+
|
|
|
+ BUG_ON(!tt);
|
|
|
+
|
|
|
+ down(&rx_queue_sema);
|
|
|
+
|
|
|
+ priv = iscsi_if_transport_lookup(tt);
|
|
|
+ BUG_ON (!priv);
|
|
|
+
|
|
|
+ spin_lock_irqsave(&priv->session_lock, flags);
|
|
|
+ if (!list_empty(&priv->sessions)) {
|
|
|
+ spin_unlock_irqrestore(&priv->session_lock, flags);
|
|
|
+ up(&rx_queue_sema);
|
|
|
+ return -EPERM;
|
|
|
+ }
|
|
|
+ spin_unlock_irqrestore(&priv->session_lock, flags);
|
|
|
+
|
|
|
+ spin_lock_irqsave(&iscsi_transport_lock, flags);
|
|
|
+ list_del(&priv->list);
|
|
|
+ spin_unlock_irqrestore(&iscsi_transport_lock, flags);
|
|
|
+
|
|
|
+ transport_container_unregister(&priv->conn_cont);
|
|
|
+ transport_container_unregister(&priv->session_cont);
|
|
|
+
|
|
|
+ sysfs_remove_group(&priv->cdev.kobj, &iscsi_transport_group);
|
|
|
+ class_device_unregister(&priv->cdev);
|
|
|
+ up(&rx_queue_sema);
|
|
|
|
|
|
-EXPORT_SYMBOL(iscsi_attach_transport);
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
|
|
|
|
|
|
-void iscsi_release_transport(struct scsi_transport_template *t)
|
|
|
+static int
|
|
|
+iscsi_rcv_nl_event(struct notifier_block *this, unsigned long event, void *ptr)
|
|
|
{
|
|
|
- struct iscsi_internal *i = to_iscsi_internal(t);
|
|
|
+ struct netlink_notify *n = ptr;
|
|
|
+
|
|
|
+ if (event == NETLINK_URELEASE &&
|
|
|
+ n->protocol == NETLINK_ISCSI && n->pid) {
|
|
|
+ struct iscsi_if_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);
|
|
|
+ }
|
|
|
|
|
|
- transport_container_unregister(&i->t.target_attrs);
|
|
|
- transport_container_unregister(&i->t.host_attrs);
|
|
|
-
|
|
|
- kfree(i);
|
|
|
+ return NOTIFY_DONE;
|
|
|
}
|
|
|
|
|
|
-EXPORT_SYMBOL(iscsi_release_transport);
|
|
|
+static struct notifier_block iscsi_nl_notifier = {
|
|
|
+ .notifier_call = iscsi_rcv_nl_event,
|
|
|
+};
|
|
|
|
|
|
static __init int iscsi_transport_init(void)
|
|
|
{
|
|
|
- int err = transport_class_register(&iscsi_transport_class);
|
|
|
+ int err;
|
|
|
|
|
|
+ err = class_register(&iscsi_transport_class);
|
|
|
if (err)
|
|
|
return err;
|
|
|
- return transport_class_register(&iscsi_host_class);
|
|
|
+
|
|
|
+ err = transport_class_register(&iscsi_connection_class);
|
|
|
+ if (err)
|
|
|
+ goto unregister_transport_class;
|
|
|
+
|
|
|
+ err = transport_class_register(&iscsi_session_class);
|
|
|
+ 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, iscsi_if_rx);
|
|
|
+ if (!nls) {
|
|
|
+ err = -ENOBUFS;
|
|
|
+ goto unregister_notifier;
|
|
|
+ }
|
|
|
+
|
|
|
+ err = mempool_zone_init(&z_reply, Z_MAX_REPLY,
|
|
|
+ NLMSG_SPACE(sizeof(struct iscsi_uevent)), Z_HIWAT_REPLY);
|
|
|
+ if (!err)
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ sock_release(nls->sk_socket);
|
|
|
+unregister_notifier:
|
|
|
+ netlink_unregister_notifier(&iscsi_nl_notifier);
|
|
|
+unregister_session_class:
|
|
|
+ transport_class_unregister(&iscsi_session_class);
|
|
|
+unregister_conn_class:
|
|
|
+ transport_class_unregister(&iscsi_connection_class);
|
|
|
+unregister_transport_class:
|
|
|
+ class_unregister(&iscsi_transport_class);
|
|
|
+ return err;
|
|
|
}
|
|
|
|
|
|
static void __exit iscsi_transport_exit(void)
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{
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- transport_class_unregister(&iscsi_host_class);
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- transport_class_unregister(&iscsi_transport_class);
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+ mempool_destroy(z_reply.pool);
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+ sock_release(nls->sk_socket);
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+ netlink_unregister_notifier(&iscsi_nl_notifier);
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+ transport_class_unregister(&iscsi_connection_class);
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+ transport_class_unregister(&iscsi_session_class);
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+ class_unregister(&iscsi_transport_class);
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}
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module_init(iscsi_transport_init);
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module_exit(iscsi_transport_exit);
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-MODULE_AUTHOR("Mike Christie");
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-MODULE_DESCRIPTION("iSCSI Transport Attributes");
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+MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
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+ "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
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+ "Alex Aizman <itn780@yahoo.com>");
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+MODULE_DESCRIPTION("iSCSI Transport Interface");
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MODULE_LICENSE("GPL");
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