#include <scsi/scsi_transport_iscsi.h>
#include <scsi/iscsi_if.h>
-#define ISCSI_SESSION_ATTRS 8
-#define ISCSI_CONN_ATTRS 6
+#define ISCSI_SESSION_ATTRS 11
+#define ISCSI_CONN_ATTRS 11
+#define ISCSI_HOST_ATTRS 0
struct iscsi_internal {
+ int daemon_pid;
struct scsi_transport_template t;
struct iscsi_transport *iscsi_transport;
struct list_head list;
- /*
- * based on transport capabilities, at register time we set these
- * bits to tell the transport class it wants attributes displayed
- * in sysfs or that it can support different iSCSI Data-Path
- * capabilities
- */
- uint32_t param_mask;
-
struct class_device cdev;
- /*
- * We do not have any private or other attrs.
- */
+
+ struct class_device_attribute *host_attrs[ISCSI_HOST_ATTRS + 1];
struct transport_container conn_cont;
struct class_device_attribute *conn_attrs[ISCSI_CONN_ATTRS + 1];
struct transport_container session_cont;
.attrs = iscsi_transport_attrs,
};
+static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
+ struct class_device *cdev)
+{
+ struct Scsi_Host *shost = dev_to_shost(dev);
+ struct iscsi_host *ihost = shost->shost_data;
+
+ memset(ihost, 0, sizeof(*ihost));
+ INIT_LIST_HEAD(&ihost->sessions);
+ mutex_init(&ihost->mutex);
+ return 0;
+}
+
+static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
+ "iscsi_host",
+ iscsi_setup_host,
+ NULL,
+ NULL);
+
static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
"iscsi_session",
NULL,
NULL);
static struct sock *nls;
-static int daemon_pid;
static DEFINE_MUTEX(rx_queue_mutex);
struct mempool_zone {
shost = iscsi_session_to_shost(session);
scsi_host_put(shost);
+ kfree(session->targetname);
kfree(session);
module_put(transport->owner);
}
return dev->release == iscsi_session_release;
}
+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_session *session;
+
+ mutex_lock(&ihost->mutex);
+ list_for_each_entry(session, &ihost->sessions, host_list) {
+ if ((channel == SCAN_WILD_CARD ||
+ channel == session->channel) &&
+ (id == SCAN_WILD_CARD || id == session->target_id))
+ scsi_scan_target(&session->dev, session->channel,
+ session->target_id, lun, 1);
+ }
+ mutex_unlock(&ihost->mutex);
+
+ return 0;
+}
+
+static void session_recovery_timedout(void *data)
+{
+ struct iscsi_cls_session *session = data;
+
+ dev_printk(KERN_INFO, &session->dev, "iscsi: session recovery timed "
+ "out after %d secs\n", session->recovery_tmo);
+
+ 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)
+{
+ if (!cancel_delayed_work(&session->recovery_work))
+ flush_scheduled_work();
+ scsi_target_unblock(&session->dev);
+}
+EXPORT_SYMBOL_GPL(iscsi_unblock_session);
+
+void iscsi_block_session(struct iscsi_cls_session *session)
+{
+ scsi_target_block(&session->dev);
+ schedule_delayed_work(&session->recovery_work,
+ session->recovery_tmo * HZ);
+}
+EXPORT_SYMBOL_GPL(iscsi_block_session);
+
/**
* iscsi_create_session - create iscsi class session
* @shost: scsi host
* 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)
+iscsi_create_session(struct Scsi_Host *shost,
+ struct iscsi_transport *transport, int channel)
{
+ struct iscsi_host *ihost;
struct iscsi_cls_session *session;
int err;
if (!session)
goto module_put;
session->transport = transport;
+ session->recovery_tmo = 120;
+ INIT_WORK(&session->recovery_work, session_recovery_timedout, session);
+ INIT_LIST_HEAD(&session->host_list);
+ INIT_LIST_HEAD(&session->sess_list);
if (transport->sessiondata_size)
session->dd_data = &session[1];
/* this is released in the dev's release function */
scsi_host_get(shost);
+ ihost = shost->shost_data;
+
session->sid = iscsi_session_nr++;
+ session->channel = channel;
+ session->target_id = ihost->next_target_id++;
+
snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u",
session->sid);
session->dev.parent = &shost->shost_gendev;
}
transport_register_device(&session->dev);
+ mutex_lock(&ihost->mutex);
+ list_add(&session->host_list, &ihost->sessions);
+ mutex_unlock(&ihost->mutex);
+
return session;
free_session:
**/
int iscsi_destroy_session(struct iscsi_cls_session *session)
{
+ 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();
+
+ mutex_lock(&ihost->mutex);
+ list_del(&session->host_list);
+ mutex_unlock(&ihost->mutex);
+
transport_unregister_device(&session->dev);
device_unregister(&session->dev);
return 0;
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);
}
EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
/*
- * These functions are used only by software iscsi_transports
- * which do not allocate and more their scsi_hosts since this
- * is initiated from userspace.
- */
-
-/*
- * iSCSI Session's hostdata organization:
- *
- * *------------------* <== hostdata_session(host->hostdata)
- * | ptr to class sess|
- * |------------------| <== iscsi_hostdata(host->hostdata)
- * | transport's data |
- * *------------------*
- */
-
-#define hostdata_privsize(_t) (sizeof(unsigned long) + _t->hostdata_size + \
- _t->hostdata_size % sizeof(unsigned long))
-
-#define hostdata_session(_hostdata) (iscsi_ptr(*(unsigned long *)_hostdata))
-
-/**
- * iscsi_transport_create_session - create iscsi cls session and host
- * scsit: scsi transport template
- * transport: iscsi transport template
- *
- * This can be used by software iscsi_transports that allocate
- * a session per scsi host.
- **/
-struct Scsi_Host *
-iscsi_transport_create_session(struct scsi_transport_template *scsit,
- struct iscsi_transport *transport)
-{
- struct iscsi_cls_session *session;
- struct Scsi_Host *shost;
- unsigned long flags;
-
- shost = scsi_host_alloc(transport->host_template,
- hostdata_privsize(transport));
- if (!shost) {
- printk(KERN_ERR "iscsi: can not allocate SCSI host for "
- "session\n");
- return NULL;
- }
-
- shost->max_id = 1;
- shost->max_channel = 0;
- shost->max_lun = transport->max_lun;
- shost->max_cmd_len = transport->max_cmd_len;
- shost->transportt = scsit;
- shost->transportt->create_work_queue = 1;
-
- if (scsi_add_host(shost, NULL))
- goto free_host;
-
- session = iscsi_create_session(shost, transport);
- if (!session)
- goto remove_host;
-
- *(unsigned long*)shost->hostdata = (unsigned long)session;
- spin_lock_irqsave(&sesslock, flags);
- list_add(&session->sess_list, &sesslist);
- spin_unlock_irqrestore(&sesslock, flags);
- return shost;
-
-remove_host:
- scsi_remove_host(shost);
-free_host:
- scsi_host_put(shost);
- return NULL;
-}
-
-EXPORT_SYMBOL_GPL(iscsi_transport_create_session);
-
-/**
- * iscsi_transport_destroy_session - destroy session and scsi host
- * shost: scsi host
- *
- * This can be used by software iscsi_transports that allocate
- * a session per scsi host.
- **/
-int iscsi_transport_destroy_session(struct Scsi_Host *shost)
-{
- struct iscsi_cls_session *session;
- unsigned long flags;
-
- scsi_remove_host(shost);
- session = hostdata_session(shost->hostdata);
- spin_lock_irqsave(&sesslock, flags);
- list_del(&session->sess_list);
- spin_unlock_irqrestore(&sesslock, flags);
- iscsi_destroy_session(session);
- /* ref from host alloc */
- scsi_host_put(shost);
- return 0;
-}
-
-EXPORT_SYMBOL_GPL(iscsi_transport_destroy_session);
-
-/*
* iscsi interface functions
*/
static struct iscsi_internal *
}
static int
-iscsi_unicast_skb(struct mempool_zone *zone, struct sk_buff *skb)
+iscsi_unicast_skb(struct mempool_zone *zone, 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);
}
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);
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);
+ priv = iscsi_if_transport_lookup(conn->transport);
+ if (!priv)
+ return -EINVAL;
+
mempool_zone_complete(conn->z_pdu);
skb = mempool_zone_get_skb(conn->z_pdu);
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);
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(conn->z_pdu, 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));
+ priv = iscsi_if_transport_lookup(conn->transport);
+ if (!priv)
+ return;
+
mempool_zone_complete(conn->z_error);
skb = mempool_zone_get_skb(conn->z_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;
ev->r.connerror.cid = conn->cid;
ev->r.connerror.sid = iscsi_conn_get_sid(conn);
- iscsi_unicast_skb(conn->z_error, skb);
+ iscsi_unicast_skb(conn->z_error, skb, priv->daemon_pid);
dev_printk(KERN_INFO, &conn->dev, "iscsi: detected conn error (%d)\n",
error);
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(z_reply, 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;
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));
skb_trim(skbstat, NLMSG_ALIGN(actual_size));
nlhstat->nlmsg_len = actual_size;
- err = iscsi_unicast_skb(conn->z_pdu, skbstat);
+ err = iscsi_unicast_skb(conn->z_pdu, skbstat, priv->daemon_pid);
} while (err < 0 && err != -ECONNREFUSED);
return err;
{
struct iscsi_transport *transport = priv->iscsi_transport;
struct iscsi_cls_session *session;
+ unsigned long flags;
uint32_t hostno;
- session = transport->create_session(&priv->t,
+ session = transport->create_session(transport, &priv->t,
ev->u.c_session.initial_cmdsn,
&hostno);
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.sid = session->sid;
return 0;
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;
+
+ session = iscsi_session_lookup(ev->u.set_param.sid);
+ conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
+ if (!conn || !session)
+ return -EINVAL;
+
+ switch (ev->u.set_param.param) {
+ case ISCSI_PARAM_SESS_RECOVERY_TMO:
+ iscsi_copy_param(ev, &value, data);
+ 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);
+ }
+
+ return err;
+}
+
+static int
+iscsi_if_transport_ep(struct iscsi_transport *transport,
+ struct iscsi_uevent *ev, int msg_type)
+{
+ struct sockaddr *dst_addr;
+ int rc = 0;
+
+ switch (msg_type) {
+ case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
+ if (!transport->ep_connect)
+ return -EINVAL;
+
+ dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
+ rc = transport->ep_connect(dst_addr,
+ ev->u.ep_connect.non_blocking,
+ &ev->r.ep_connect_ret.handle);
+ break;
+ case ISCSI_UEVENT_TRANSPORT_EP_POLL:
+ if (!transport->ep_poll)
+ return -EINVAL;
+
+ ev->r.retcode = transport->ep_poll(ev->u.ep_poll.ep_handle,
+ ev->u.ep_poll.timeout_ms);
+ break;
+ case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
+ if (!transport->ep_disconnect)
+ return -EINVAL;
+
+ transport->ep_disconnect(ev->u.ep_disconnect.ep_handle);
+ break;
+ }
+ return rc;
+}
+
static int
iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
{
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);
break;
case ISCSI_UEVENT_DESTROY_SESSION:
session = iscsi_session_lookup(ev->u.d_session.sid);
- if (session)
+ if (session) {
+ spin_lock_irqsave(&sesslock, flags);
+ list_del(&session->sess_list);
+ spin_unlock_irqrestore(&sesslock, flags);
+
transport->destroy_session(session);
- else
+ } else
err = -EINVAL;
break;
case ISCSI_UEVENT_CREATE_CONN:
if (session && conn)
ev->r.retcode = transport->bind_conn(session, conn,
- ev->u.b_conn.transport_fd,
+ ev->u.b_conn.transport_eph,
ev->u.b_conn.is_leading);
else
err = -EINVAL;
break;
case ISCSI_UEVENT_SET_PARAM:
- conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
- if (conn)
- ev->r.retcode = transport->set_param(conn,
- ev->u.set_param.param, ev->u.set_param.value);
- else
- err = -EINVAL;
+ err = iscsi_set_param(transport, ev);
break;
case ISCSI_UEVENT_START_CONN:
conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
ev->r.retcode = transport->start_conn(conn);
else
err = -EINVAL;
-
break;
case ISCSI_UEVENT_STOP_CONN:
conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
case ISCSI_UEVENT_GET_STATS:
err = iscsi_if_get_stats(transport, nlh);
break;
+ case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
+ case ISCSI_UEVENT_TRANSPORT_EP_POLL:
+ case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
+ err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
+ break;
default:
err = -EINVAL;
break;
skb_pull(skb, skb->len);
goto free_skb;
}
- daemon_pid = NETLINK_CREDS(skb)->pid;
while (skb->len >= NLMSG_SPACE(0)) {
int err;
#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 = \
+ __ATTR(_name,_mode,_show,_store)
+
/*
* iSCSI connection attrs
*/
#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);
+static ISCSI_CLASS_ATTR(conn, 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(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");
+iscsi_conn_int_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN, "%u");
+
+#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)
#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);
+static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_int_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(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 SETUP_SESSION_RD_ATTR(field, param) \
- if (priv->param_mask & (1 << param)) { \
- priv->session_attrs[count] = &class_device_attr_##field;\
- count++; \
- }
+#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); \
+}
+
+#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, \
+ NULL);
-#define SETUP_CONN_RD_ATTR(field, param) \
- if (priv->param_mask & (1 << param)) { \
- priv->conn_attrs[count] = &class_device_attr_##field; \
+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) \
+{ \
+ struct iscsi_cls_session *session = iscsi_cdev_to_session(cdev); \
+ return sprintf(buf, format"\n", session->field); \
+}
+
+#define iscsi_priv_session_attr(field, format) \
+ 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) \
+static ssize_t \
+show_priv_conn_##field(struct class_device *cdev, char *buf) \
+{ \
+ struct iscsi_cls_conn *conn = iscsi_cdev_to_conn(cdev); \
+ return sprintf(buf, format"\n", conn->field); \
+}
+
+#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 SETUP_PRIV_SESSION_RD_ATTR(field) \
+do { \
+ priv->session_attrs[count] = &class_device_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; \
count++; \
- }
+ } \
+} while (0)
+
+#define SETUP_PRIV_CONN_RD_ATTR(field) \
+do { \
+ priv->conn_attrs[count] = &class_device_attr_priv_conn_##field; \
+ count++; \
+} while (0)
+
+#define SETUP_CONN_RD_ATTR(field, param_flag) \
+do { \
+ if (tt->param_mask & param_flag) { \
+ priv->conn_attrs[count] = &class_device_attr_conn_##field; \
+ count++; \
+ } \
+} while (0)
static int iscsi_session_match(struct attribute_container *cont,
struct device *dev)
return &priv->conn_cont.ac == cont;
}
+static int iscsi_host_match(struct attribute_container *cont,
+ struct device *dev)
+{
+ struct Scsi_Host *shost;
+ struct iscsi_internal *priv;
+
+ if (!scsi_is_host_device(dev))
+ return 0;
+
+ shost = dev_to_shost(dev);
+ if (!shost->transportt ||
+ shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
+ return 0;
+
+ priv = to_iscsi_internal(shost->transportt);
+ return &priv->t.host_attrs.ac == cont;
+}
+
struct scsi_transport_template *
iscsi_register_transport(struct iscsi_transport *tt)
{
return NULL;
INIT_LIST_HEAD(&priv->list);
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);
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);
- }
+ /* 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;
+ transport_container_register(&priv->t.host_attrs);
/* connection parameters */
priv->conn_cont.ac.attrs = &priv->conn_attrs[0];
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);
+ SETUP_CONN_RD_ATTR(max_recv_dlength, ISCSI_MAX_RECV_DLENGTH);
+ SETUP_CONN_RD_ATTR(max_xmit_dlength, ISCSI_MAX_XMIT_DLENGTH);
+ SETUP_CONN_RD_ATTR(header_digest, ISCSI_HDRDGST_EN);
+ SETUP_CONN_RD_ATTR(data_digest, ISCSI_DATADGST_EN);
+ SETUP_CONN_RD_ATTR(ifmarker, ISCSI_IFMARKER_EN);
+ SETUP_CONN_RD_ATTR(ofmarker, ISCSI_OFMARKER_EN);
+ SETUP_CONN_RD_ATTR(address, ISCSI_CONN_ADDRESS);
+ SETUP_CONN_RD_ATTR(port, ISCSI_CONN_PORT);
+ SETUP_CONN_RD_ATTR(exp_statsn, ISCSI_EXP_STATSN);
+
+ 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);
BUG_ON(count > ISCSI_CONN_ATTRS);
priv->conn_attrs[count] = NULL;
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);
+ SETUP_SESSION_RD_ATTR(initial_r2t, ISCSI_INITIAL_R2T_EN);
+ SETUP_SESSION_RD_ATTR(max_outstanding_r2t, ISCSI_MAX_R2T);
+ SETUP_SESSION_RD_ATTR(immediate_data, ISCSI_IMM_DATA_EN);
+ SETUP_SESSION_RD_ATTR(first_burst_len, ISCSI_FIRST_BURST);
+ SETUP_SESSION_RD_ATTR(max_burst_len, ISCSI_MAX_BURST);
+ 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_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);
BUG_ON(count > ISCSI_SESSION_ATTRS);
priv->session_attrs[count] = NULL;
transport_container_unregister(&priv->conn_cont);
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);
if (err)
return err;
- err = transport_class_register(&iscsi_connection_class);
+ err = transport_class_register(&iscsi_host_class);
if (err)
goto unregister_transport_class;
+ err = transport_class_register(&iscsi_connection_class);
+ if (err)
+ goto unregister_host_class;
+
err = transport_class_register(&iscsi_session_class);
if (err)
goto unregister_conn_class;
transport_class_unregister(&iscsi_session_class);
unregister_conn_class:
transport_class_unregister(&iscsi_connection_class);
+unregister_host_class:
+ transport_class_unregister(&iscsi_host_class);
unregister_transport_class:
class_unregister(&iscsi_transport_class);
return err;
netlink_unregister_notifier(&iscsi_nl_notifier);
transport_class_unregister(&iscsi_connection_class);
transport_class_unregister(&iscsi_session_class);
+ transport_class_unregister(&iscsi_host_class);
class_unregister(&iscsi_transport_class);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff