*/
#include <linux/module.h>
#include <linux/mutex.h>
+#include <linux/slab.h>
#include <net/tcp.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport_iscsi.h>
#include <scsi/iscsi_if.h>
-#define ISCSI_SESSION_ATTRS 19
+#define ISCSI_SESSION_ATTRS 22
#define ISCSI_CONN_ATTRS 13
#define ISCSI_HOST_ATTRS 4
-#define ISCSI_TRANSPORT_VERSION "2.0-869"
+
+#define ISCSI_TRANSPORT_VERSION "2.0-870"
+
+static int dbg_session;
+module_param_named(debug_session, dbg_session, int,
+ S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug_session,
+ "Turn on debugging for sessions in scsi_transport_iscsi "
+ "module. Set to 1 to turn on, and zero to turn off. Default "
+ "is off.");
+
+static int dbg_conn;
+module_param_named(debug_conn, dbg_conn, int,
+ S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug_conn,
+ "Turn on debugging for connections in scsi_transport_iscsi "
+ "module. Set to 1 to turn on, and zero to turn off. Default "
+ "is off.");
+
+#define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \
+ do { \
+ if (dbg_session) \
+ iscsi_cls_session_printk(KERN_INFO, _session, \
+ "%s: " dbg_fmt, \
+ __func__, ##arg); \
+ } while (0);
+
+#define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \
+ do { \
+ if (dbg_conn) \
+ iscsi_cls_conn_printk(KERN_INFO, _conn, \
+ "%s: " dbg_fmt, \
+ __func__, ##arg); \
+ } while (0);
struct iscsi_internal {
- int daemon_pid;
struct scsi_transport_template t;
struct iscsi_transport *iscsi_transport;
struct list_head list;
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
show_transport_attr(caps, "0x%x");
-show_transport_attr(max_lun, "%d");
-show_transport_attr(max_conn, "%d");
-show_transport_attr(max_cmd_len, "%d");
static struct attribute *iscsi_transport_attrs[] = {
&dev_attr_handle.attr,
&dev_attr_caps.attr,
- &dev_attr_max_lun.attr,
- &dev_attr_max_conn.attr,
- &dev_attr_max_cmd_len.attr,
NULL,
};
.attrs = iscsi_transport_attrs,
};
+/*
+ * iSCSI endpoint attrs
+ */
+#define iscsi_dev_to_endpoint(_dev) \
+ container_of(_dev, struct iscsi_endpoint, dev)
+#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \
+struct device_attribute dev_attr_##_prefix##_##_name = \
+ __ATTR(_name,_mode,_show,_store)
-static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
- struct device *cdev)
+static void iscsi_endpoint_release(struct device *dev)
{
- struct Scsi_Host *shost = dev_to_shost(dev);
- struct iscsi_host *ihost = shost->shost_data;
+ struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
+ kfree(ep);
+}
- memset(ihost, 0, sizeof(*ihost));
- INIT_LIST_HEAD(&ihost->sessions);
- mutex_init(&ihost->mutex);
- atomic_set(&ihost->nr_scans, 0);
+static struct class iscsi_endpoint_class = {
+ .name = "iscsi_endpoint",
+ .dev_release = iscsi_endpoint_release,
+};
- snprintf(ihost->scan_workq_name, KOBJ_NAME_LEN, "iscsi_scan_%d",
- shost->host_no);
- ihost->scan_workq = create_singlethread_workqueue(
- ihost->scan_workq_name);
- if (!ihost->scan_workq)
- return -ENOMEM;
- return 0;
+static ssize_t
+show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
+ return sprintf(buf, "%llu\n", (unsigned long long) ep->id);
+}
+static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
+
+static struct attribute *iscsi_endpoint_attrs[] = {
+ &dev_attr_ep_handle.attr,
+ NULL,
+};
+
+static struct attribute_group iscsi_endpoint_group = {
+ .attrs = iscsi_endpoint_attrs,
+};
+
+#define ISCSI_MAX_EPID -1
+
+static int iscsi_match_epid(struct device *dev, void *data)
+{
+ struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
+ uint64_t *epid = (uint64_t *) data;
+
+ return *epid == ep->id;
+}
+
+struct iscsi_endpoint *
+iscsi_create_endpoint(int dd_size)
+{
+ struct device *dev;
+ struct iscsi_endpoint *ep;
+ uint64_t id;
+ int err;
+
+ for (id = 1; id < ISCSI_MAX_EPID; id++) {
+ dev = class_find_device(&iscsi_endpoint_class, NULL, &id,
+ iscsi_match_epid);
+ if (!dev)
+ break;
+ }
+ if (id == ISCSI_MAX_EPID) {
+ printk(KERN_ERR "Too many connections. Max supported %u\n",
+ ISCSI_MAX_EPID - 1);
+ return NULL;
+ }
+
+ ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);
+ if (!ep)
+ return NULL;
+
+ ep->id = id;
+ ep->dev.class = &iscsi_endpoint_class;
+ dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id);
+ err = device_register(&ep->dev);
+ if (err)
+ goto free_ep;
+
+ err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);
+ if (err)
+ goto unregister_dev;
+
+ if (dd_size)
+ ep->dd_data = &ep[1];
+ return ep;
+
+unregister_dev:
+ device_unregister(&ep->dev);
+ return NULL;
+
+free_ep:
+ kfree(ep);
+ return NULL;
}
+EXPORT_SYMBOL_GPL(iscsi_create_endpoint);
-static int iscsi_remove_host(struct transport_container *tc, struct device *dev,
- struct device *cdev)
+void iscsi_destroy_endpoint(struct iscsi_endpoint *ep)
+{
+ sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group);
+ device_unregister(&ep->dev);
+}
+EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint);
+
+struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle)
+{
+ struct iscsi_endpoint *ep;
+ struct device *dev;
+
+ dev = class_find_device(&iscsi_endpoint_class, NULL, &handle,
+ iscsi_match_epid);
+ if (!dev)
+ return NULL;
+
+ ep = iscsi_dev_to_endpoint(dev);
+ /*
+ * we can drop this now because the interface will prevent
+ * removals and lookups from racing.
+ */
+ put_device(dev);
+ return ep;
+}
+EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);
+
+static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
+ struct device *cdev)
{
struct Scsi_Host *shost = dev_to_shost(dev);
- struct iscsi_host *ihost = shost->shost_data;
+ struct iscsi_cls_host *ihost = shost->shost_data;
- destroy_workqueue(ihost->scan_workq);
+ memset(ihost, 0, sizeof(*ihost));
+ atomic_set(&ihost->nr_scans, 0);
+ mutex_init(&ihost->mutex);
return 0;
}
static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
"iscsi_host",
iscsi_setup_host,
- iscsi_remove_host,
+ NULL,
NULL);
static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
err = DID_IMM_RETRY << 16;
break;
case ISCSI_SESSION_FREE:
- err = DID_NO_CONNECT << 16;
+ err = DID_TRANSPORT_FAILFAST << 16;
break;
default:
err = DID_NO_CONNECT << 16;
shost = iscsi_session_to_shost(session);
scsi_host_put(shost);
+ ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
kfree(session);
}
return dev->release == iscsi_session_release;
}
+static int iscsi_iter_session_fn(struct device *dev, void *data)
+{
+ void (* fn) (struct iscsi_cls_session *) = data;
+
+ if (!iscsi_is_session_dev(dev))
+ return 0;
+ fn(iscsi_dev_to_session(dev));
+ return 0;
+}
+
+void iscsi_host_for_each_session(struct Scsi_Host *shost,
+ void (*fn)(struct iscsi_cls_session *))
+{
+ device_for_each_child(&shost->shost_gendev, fn,
+ iscsi_iter_session_fn);
+}
+EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
+
/**
* iscsi_scan_finished - helper to report when running scans are done
* @shost: scsi host
*/
int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
{
- struct iscsi_host *ihost = shost->shost_data;
+ struct iscsi_cls_host *ihost = shost->shost_data;
/*
* qla4xxx will have kicked off some session unblocks before calling
* scsi_scan_host, so just wait for them to complete.
}
EXPORT_SYMBOL_GPL(iscsi_scan_finished);
-static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
- uint id, uint lun)
+struct iscsi_scan_data {
+ unsigned int channel;
+ unsigned int id;
+ unsigned int lun;
+};
+
+static int iscsi_user_scan_session(struct device *dev, void *data)
{
- struct iscsi_host *ihost = shost->shost_data;
+ struct iscsi_scan_data *scan_data = data;
struct iscsi_cls_session *session;
+ struct Scsi_Host *shost;
+ struct iscsi_cls_host *ihost;
+ unsigned long flags;
+ unsigned int id;
+
+ if (!iscsi_is_session_dev(dev))
+ return 0;
+
+ session = iscsi_dev_to_session(dev);
+
+ ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
+
+ shost = iscsi_session_to_shost(session);
+ ihost = shost->shost_data;
mutex_lock(&ihost->mutex);
- list_for_each_entry(session, &ihost->sessions, host_list) {
- if ((channel == SCAN_WILD_CARD || channel == 0) &&
- (id == SCAN_WILD_CARD || id == session->target_id))
- scsi_scan_target(&session->dev, 0,
- session->target_id, lun, 1);
+ spin_lock_irqsave(&session->lock, flags);
+ if (session->state != ISCSI_SESSION_LOGGED_IN) {
+ spin_unlock_irqrestore(&session->lock, flags);
+ goto user_scan_exit;
+ }
+ id = session->target_id;
+ spin_unlock_irqrestore(&session->lock, flags);
+
+ if (id != ISCSI_MAX_TARGET) {
+ if ((scan_data->channel == SCAN_WILD_CARD ||
+ scan_data->channel == 0) &&
+ (scan_data->id == SCAN_WILD_CARD ||
+ scan_data->id == id))
+ scsi_scan_target(&session->dev, 0, id,
+ scan_data->lun, 1);
}
- mutex_unlock(&ihost->mutex);
+user_scan_exit:
+ mutex_unlock(&ihost->mutex);
+ ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
return 0;
}
+static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
+ uint id, uint lun)
+{
+ struct iscsi_scan_data scan_data;
+
+ scan_data.channel = channel;
+ scan_data.id = id;
+ scan_data.lun = lun;
+
+ return device_for_each_child(&shost->shost_gendev, &scan_data,
+ iscsi_user_scan_session);
+}
+
static void iscsi_scan_session(struct work_struct *work)
{
struct iscsi_cls_session *session =
container_of(work, struct iscsi_cls_session, scan_work);
struct Scsi_Host *shost = iscsi_session_to_shost(session);
- struct iscsi_host *ihost = shost->shost_data;
- unsigned long flags;
+ struct iscsi_cls_host *ihost = shost->shost_data;
+ struct iscsi_scan_data scan_data;
- spin_lock_irqsave(&session->lock, flags);
- if (session->state != ISCSI_SESSION_LOGGED_IN) {
- spin_unlock_irqrestore(&session->lock, flags);
- goto done;
- }
- spin_unlock_irqrestore(&session->lock, flags);
+ scan_data.channel = 0;
+ scan_data.id = SCAN_WILD_CARD;
+ scan_data.lun = SCAN_WILD_CARD;
- scsi_scan_target(&session->dev, 0, session->target_id,
- SCAN_WILD_CARD, 1);
-done:
+ iscsi_user_scan_session(&session->dev, &scan_data);
atomic_dec(&ihost->nr_scans);
}
if (session->transport->session_recovery_timedout)
session->transport->session_recovery_timedout(session);
+ ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
scsi_target_unblock(&session->dev);
+ ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
}
static void __iscsi_unblock_session(struct work_struct *work)
container_of(work, struct iscsi_cls_session,
unblock_work);
struct Scsi_Host *shost = iscsi_session_to_shost(session);
- struct iscsi_host *ihost = shost->shost_data;
+ struct iscsi_cls_host *ihost = shost->shost_data;
unsigned long flags;
+ ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
/*
* The recovery and unblock work get run from the same workqueue,
* so try to cancel it if it was going to run after this unblock.
* scanning from userspace).
*/
if (shost->hostt->scan_finished) {
- if (queue_work(ihost->scan_workq, &session->scan_work))
+ if (scsi_queue_work(shost, &session->scan_work))
atomic_inc(&ihost->nr_scans);
}
+ ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
}
/**
block_work);
unsigned long flags;
+ ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
spin_lock_irqsave(&session->lock, flags);
session->state = ISCSI_SESSION_FAILED;
spin_unlock_irqrestore(&session->lock, flags);
scsi_target_block(&session->dev);
- queue_delayed_work(iscsi_eh_timer_workq, &session->recovery_work,
- session->recovery_tmo * HZ);
+ ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
+ if (session->recovery_tmo >= 0)
+ queue_delayed_work(iscsi_eh_timer_workq,
+ &session->recovery_work,
+ session->recovery_tmo * HZ);
}
void iscsi_block_session(struct iscsi_cls_session *session)
container_of(work, struct iscsi_cls_session,
unbind_work);
struct Scsi_Host *shost = iscsi_session_to_shost(session);
- struct iscsi_host *ihost = shost->shost_data;
+ struct iscsi_cls_host *ihost = shost->shost_data;
+ unsigned long flags;
+
+ ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
/* Prevent new scans and make sure scanning is not in progress */
mutex_lock(&ihost->mutex);
- if (list_empty(&session->host_list)) {
+ spin_lock_irqsave(&session->lock, flags);
+ if (session->target_id == ISCSI_MAX_TARGET) {
+ spin_unlock_irqrestore(&session->lock, flags);
mutex_unlock(&ihost->mutex);
return;
}
- list_del_init(&session->host_list);
+ session->target_id = ISCSI_MAX_TARGET;
+ spin_unlock_irqrestore(&session->lock, flags);
mutex_unlock(&ihost->mutex);
scsi_remove_target(&session->dev);
iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
-}
-
-static int iscsi_unbind_session(struct iscsi_cls_session *session)
-{
- struct Scsi_Host *shost = iscsi_session_to_shost(session);
- struct iscsi_host *ihost = shost->shost_data;
-
- return queue_work(ihost->scan_workq, &session->unbind_work);
+ ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
}
struct iscsi_cls_session *
-iscsi_alloc_session(struct Scsi_Host *shost,
- struct iscsi_transport *transport)
+iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
+ int dd_size)
{
struct iscsi_cls_session *session;
- session = kzalloc(sizeof(*session) + transport->sessiondata_size,
+ session = kzalloc(sizeof(*session) + dd_size,
GFP_KERNEL);
if (!session)
return NULL;
session->recovery_tmo = 120;
session->state = ISCSI_SESSION_FREE;
INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
- INIT_LIST_HEAD(&session->host_list);
INIT_LIST_HEAD(&session->sess_list);
INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
INIT_WORK(&session->block_work, __iscsi_block_session);
session->dev.parent = &shost->shost_gendev;
session->dev.release = iscsi_session_release;
device_initialize(&session->dev);
- if (transport->sessiondata_size)
+ if (dd_size)
session->dd_data = &session[1];
+
+ ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
return session;
}
EXPORT_SYMBOL_GPL(iscsi_alloc_session);
+static int iscsi_get_next_target_id(struct device *dev, void *data)
+{
+ struct iscsi_cls_session *session;
+ unsigned long flags;
+ int err = 0;
+
+ if (!iscsi_is_session_dev(dev))
+ return 0;
+
+ session = iscsi_dev_to_session(dev);
+ spin_lock_irqsave(&session->lock, flags);
+ if (*((unsigned int *) data) == session->target_id)
+ err = -EEXIST;
+ spin_unlock_irqrestore(&session->lock, flags);
+ return err;
+}
+
int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
{
struct Scsi_Host *shost = iscsi_session_to_shost(session);
- struct iscsi_host *ihost;
+ struct iscsi_cls_host *ihost;
unsigned long flags;
+ unsigned int id = target_id;
int err;
ihost = shost->shost_data;
session->sid = atomic_add_return(1, &iscsi_session_nr);
- session->target_id = target_id;
- snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u",
- session->sid);
+ if (id == ISCSI_MAX_TARGET) {
+ for (id = 0; id < ISCSI_MAX_TARGET; id++) {
+ err = device_for_each_child(&shost->shost_gendev, &id,
+ iscsi_get_next_target_id);
+ if (!err)
+ break;
+ }
+
+ if (id == ISCSI_MAX_TARGET) {
+ iscsi_cls_session_printk(KERN_ERR, session,
+ "Too many iscsi targets. Max "
+ "number of targets is %d.\n",
+ ISCSI_MAX_TARGET - 1);
+ err = -EOVERFLOW;
+ goto release_host;
+ }
+ }
+ session->target_id = id;
+
+ dev_set_name(&session->dev, "session%u", session->sid);
err = device_add(&session->dev);
if (err) {
iscsi_cls_session_printk(KERN_ERR, session,
list_add(&session->sess_list, &sesslist);
spin_unlock_irqrestore(&sesslock, flags);
- mutex_lock(&ihost->mutex);
- list_add(&session->host_list, &ihost->sessions);
- mutex_unlock(&ihost->mutex);
-
iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
+ ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
return 0;
release_host:
* iscsi_create_session - create iscsi class session
* @shost: scsi host
* @transport: iscsi transport
+ * @dd_size: private driver data size
* @target_id: which target
*
* This can be called from a LLD or iscsi_transport.
*/
struct iscsi_cls_session *
-iscsi_create_session(struct Scsi_Host *shost,
- struct iscsi_transport *transport,
- unsigned int target_id)
+iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
+ int dd_size, unsigned int target_id)
{
struct iscsi_cls_session *session;
- session = iscsi_alloc_session(shost, transport);
+ session = iscsi_alloc_session(shost, transport, dd_size);
if (!session)
return NULL;
struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
struct device *parent = conn->dev.parent;
+ ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
kfree(conn);
put_device(parent);
}
void iscsi_remove_session(struct iscsi_cls_session *session)
{
struct Scsi_Host *shost = iscsi_session_to_shost(session);
- struct iscsi_host *ihost = shost->shost_data;
unsigned long flags;
int err;
+ ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
+
spin_lock_irqsave(&sesslock, flags);
list_del(&session->sess_list);
spin_unlock_irqrestore(&sesslock, flags);
scsi_target_unblock(&session->dev);
/* flush running scans then delete devices */
- flush_workqueue(ihost->scan_workq);
+ scsi_flush_work(shost);
__iscsi_unbind_session(&session->unbind_work);
/* hw iscsi may not have removed all connections from session */
"for session. Error %d.\n", err);
transport_unregister_device(&session->dev);
+
+ ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
device_del(&session->dev);
}
EXPORT_SYMBOL_GPL(iscsi_remove_session);
void iscsi_free_session(struct iscsi_cls_session *session)
{
+ ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
put_device(&session->dev);
}
int iscsi_destroy_session(struct iscsi_cls_session *session)
{
iscsi_remove_session(session);
+ ISCSI_DBG_TRANS_SESSION(session, "Completing session destruction\n");
iscsi_free_session(session);
return 0;
}
/**
* iscsi_create_conn - create iscsi class connection
* @session: iscsi cls session
+ * @dd_size: private driver data size
* @cid: connection id
*
* This can be called from a LLD or iscsi_transport. The connection
* non-zero.
*/
struct iscsi_cls_conn *
-iscsi_create_conn(struct iscsi_cls_session *session, uint32_t cid)
+iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
{
struct iscsi_transport *transport = session->transport;
struct iscsi_cls_conn *conn;
unsigned long flags;
int err;
- conn = kzalloc(sizeof(*conn) + transport->conndata_size, GFP_KERNEL);
+ conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
if (!conn)
return NULL;
-
- if (transport->conndata_size)
+ if (dd_size)
conn->dd_data = &conn[1];
INIT_LIST_HEAD(&conn->conn_list);
if (!get_device(&session->dev))
goto free_conn;
- snprintf(conn->dev.bus_id, BUS_ID_SIZE, "connection%d:%u",
- session->sid, cid);
+ dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
conn->dev.parent = &session->dev;
conn->dev.release = iscsi_conn_release;
err = device_register(&conn->dev);
list_add(&conn->conn_list, &connlist);
conn->active = 1;
spin_unlock_irqrestore(&connlock, flags);
+
+ ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
return conn;
release_parent_ref:
spin_unlock_irqrestore(&connlock, flags);
transport_unregister_device(&conn->dev);
+ ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
device_unregister(&conn->dev);
return 0;
}
}
static int
-iscsi_broadcast_skb(struct sk_buff *skb, gfp_t gfp)
-{
- int rc;
-
- rc = netlink_broadcast(nls, skb, 0, 1, gfp);
- if (rc < 0) {
- printk(KERN_ERR "iscsi: can not broadcast skb (%d)\n", rc);
- return rc;
- }
-
- return 0;
-}
-
-static int
-iscsi_unicast_skb(struct sk_buff *skb, int pid)
+iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
{
- int rc;
-
- rc = netlink_unicast(nls, skb, pid, MSG_DONTWAIT);
- if (rc < 0) {
- printk(KERN_ERR "iscsi: can not unicast skb (%d)\n", rc);
- return rc;
- }
-
- return 0;
+ return nlmsg_multicast(nls, skb, 0, group, gfp);
}
int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
skb = alloc_skb(len, GFP_ATOMIC);
if (!skb) {
- iscsi_conn_error(conn, ISCSI_ERR_CONN_FAILED);
+ iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
"control PDU: OOM\n");
return -ENOMEM;
}
- nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0);
+ nlh = __nlmsg_put(skb, 0, 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(skb, priv->daemon_pid);
+ return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
}
EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
-void iscsi_conn_error(struct iscsi_cls_conn *conn, enum iscsi_err error)
+int iscsi_offload_mesg(struct Scsi_Host *shost,
+ struct iscsi_transport *transport, uint32_t type,
+ char *data, uint16_t data_size)
+{
+ struct nlmsghdr *nlh;
+ struct sk_buff *skb;
+ struct iscsi_uevent *ev;
+ int len = NLMSG_SPACE(sizeof(*ev) + data_size);
+
+ skb = alloc_skb(len, GFP_ATOMIC);
+ if (!skb) {
+ printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
+ return -ENOMEM;
+ }
+
+ nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
+ ev = NLMSG_DATA(nlh);
+ memset(ev, 0, sizeof(*ev));
+ ev->type = type;
+ ev->transport_handle = iscsi_handle(transport);
+ switch (type) {
+ case ISCSI_KEVENT_PATH_REQ:
+ ev->r.req_path.host_no = shost->host_no;
+ break;
+ case ISCSI_KEVENT_IF_DOWN:
+ ev->r.notify_if_down.host_no = shost->host_no;
+ break;
+ }
+
+ memcpy((char *)ev + sizeof(*ev), data, data_size);
+
+ return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
+}
+EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
+
+void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
{
struct nlmsghdr *nlh;
struct sk_buff *skb;
return;
}
- nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0);
+ nlh = __nlmsg_put(skb, 0, 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_broadcast_skb(skb, GFP_ATOMIC);
+ iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
error);
}
-EXPORT_SYMBOL_GPL(iscsi_conn_error);
+EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
static int
-iscsi_if_send_reply(int pid, int seq, int type, int done, int multi,
- void *payload, int size)
+iscsi_if_send_reply(uint32_t group, int seq, int type, int done, int multi,
+ void *payload, int size)
{
struct sk_buff *skb;
struct nlmsghdr *nlh;
return -ENOMEM;
}
- nlh = __nlmsg_put(skb, pid, seq, t, (len - sizeof(*nlh)), 0);
+ nlh = __nlmsg_put(skb, 0, 0, t, (len - sizeof(*nlh)), 0);
nlh->nlmsg_flags = flags;
memcpy(NLMSG_DATA(nlh), payload, size);
- return iscsi_unicast_skb(skb, pid);
+ return iscsi_multicast_skb(skb, group, GFP_ATOMIC);
}
static int
return -ENOMEM;
}
- nlhstat = __nlmsg_put(skbstat, priv->daemon_pid, 0, 0,
+ nlhstat = __nlmsg_put(skbstat, 0, 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(skbstat, priv->daemon_pid);
+ err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
+ GFP_ATOMIC);
} while (err < 0 && err != -ECONNREFUSED);
return err;
return -ENOMEM;
}
- nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0);
+ nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
ev = NLMSG_DATA(nlh);
ev->transport_handle = iscsi_handle(session->transport);
* this will occur if the daemon is not up, so we just warn
* the user and when the daemon is restarted it will handle it
*/
- rc = iscsi_broadcast_skb(skb, GFP_KERNEL);
- if (rc < 0)
+ rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
+ if (rc == -ESRCH)
iscsi_cls_session_printk(KERN_ERR, session,
"Cannot notify userspace of session "
"event %u. Check iscsi daemon\n",
event);
+
+ ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
+ event, rc);
return rc;
}
EXPORT_SYMBOL_GPL(iscsi_session_event);
static int
-iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_uevent *ev,
- uint32_t host_no, uint32_t initial_cmdsn,
+iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
+ struct iscsi_uevent *ev, uint32_t initial_cmdsn,
uint16_t cmds_max, uint16_t queue_depth)
{
struct iscsi_transport *transport = priv->iscsi_transport;
struct iscsi_cls_session *session;
- struct Scsi_Host *shost = NULL;
-
- /*
- * Software iscsi allocates a host per session, but
- * offload drivers (and possibly iser one day) allocate a host per
- * hba/nic/rnic. Offload will match a host here, but software will
- * return a new hostno after the create_session callback has returned.
- */
- if (host_no != UINT_MAX) {
- shost = scsi_host_lookup(host_no);
- if (IS_ERR(shost)) {
- printk(KERN_ERR "Could not find host no %u to "
- "create session\n", host_no);
- return -ENODEV;
- }
- }
+ struct Scsi_Host *shost;
- session = transport->create_session(transport, &priv->t, shost,
- cmds_max, queue_depth,
- initial_cmdsn, &host_no);
- if (shost)
- scsi_host_put(shost);
+ session = transport->create_session(ep, cmds_max, queue_depth,
+ initial_cmdsn);
if (!session)
return -ENOMEM;
- ev->r.c_session_ret.host_no = host_no;
+ shost = iscsi_session_to_shost(session);
+ ev->r.c_session_ret.host_no = shost->host_no;
ev->r.c_session_ret.sid = session->sid;
+ ISCSI_DBG_TRANS_SESSION(session,
+ "Completed creating transport session\n");
return 0;
}
ev->r.c_conn_ret.sid = session->sid;
ev->r.c_conn_ret.cid = conn->cid;
+
+ ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
return 0;
}
if (!conn)
return -EINVAL;
+ ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
if (transport->destroy_conn)
transport->destroy_conn(conn);
+
return 0;
}
switch (ev->u.set_param.param) {
case ISCSI_PARAM_SESS_RECOVERY_TMO:
sscanf(data, "%d", &value);
- if (value != 0)
- session->recovery_tmo = value;
+ session->recovery_tmo = value;
break;
default:
err = transport->set_param(conn, ev->u.set_param.param,
return err;
}
+static int iscsi_if_ep_connect(struct iscsi_transport *transport,
+ struct iscsi_uevent *ev, int msg_type)
+{
+ struct iscsi_endpoint *ep;
+ struct sockaddr *dst_addr;
+ struct Scsi_Host *shost = NULL;
+ int non_blocking, err = 0;
+
+ if (!transport->ep_connect)
+ return -EINVAL;
+
+ if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
+ shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
+ if (!shost) {
+ printk(KERN_ERR "ep connect failed. Could not find "
+ "host no %u\n",
+ ev->u.ep_connect_through_host.host_no);
+ return -ENODEV;
+ }
+ non_blocking = ev->u.ep_connect_through_host.non_blocking;
+ } else
+ non_blocking = ev->u.ep_connect.non_blocking;
+
+ dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
+ ep = transport->ep_connect(shost, dst_addr, non_blocking);
+ if (IS_ERR(ep)) {
+ err = PTR_ERR(ep);
+ goto release_host;
+ }
+
+ ev->r.ep_connect_ret.handle = ep->id;
+release_host:
+ if (shost)
+ scsi_host_put(shost);
+ return err;
+}
+
static int
iscsi_if_transport_ep(struct iscsi_transport *transport,
struct iscsi_uevent *ev, int msg_type)
{
- struct sockaddr *dst_addr;
+ struct iscsi_endpoint *ep;
int rc = 0;
switch (msg_type) {
+ case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
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);
+ rc = iscsi_if_ep_connect(transport, ev, msg_type);
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,
+ ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
+ if (!ep)
+ return -EINVAL;
+
+ ev->r.retcode = transport->ep_poll(ep,
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);
+ ep = iscsi_lookup_endpoint(ev->u.ep_disconnect.ep_handle);
+ if (!ep)
+ return -EINVAL;
+
+ transport->ep_disconnect(ep);
break;
}
return rc;
return -EINVAL;
shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
- if (IS_ERR(shost)) {
+ if (!shost) {
printk(KERN_ERR "target discovery could not find host no %u\n",
ev->u.tgt_dscvr.host_no);
return -ENODEV;
return -ENOSYS;
shost = scsi_host_lookup(ev->u.set_host_param.host_no);
- if (IS_ERR(shost)) {
+ if (!shost) {
printk(KERN_ERR "set_host_param could not find host no %u\n",
ev->u.set_host_param.host_no);
return -ENODEV;
}
static int
-iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
+iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
+{
+ struct Scsi_Host *shost;
+ struct iscsi_path *params;
+ int err;
+
+ if (!transport->set_path)
+ return -ENOSYS;
+
+ shost = scsi_host_lookup(ev->u.set_path.host_no);
+ if (!shost) {
+ printk(KERN_ERR "set path could not find host no %u\n",
+ ev->u.set_path.host_no);
+ return -ENODEV;
+ }
+
+ params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
+ err = transport->set_path(shost, params);
+
+ scsi_host_put(shost);
+ return err;
+}
+
+static int
+iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
{
int err = 0;
- uint32_t host_no = UINT_MAX;
struct iscsi_uevent *ev = NLMSG_DATA(nlh);
struct iscsi_transport *transport = NULL;
struct iscsi_internal *priv;
struct iscsi_cls_session *session;
struct iscsi_cls_conn *conn;
+ struct iscsi_endpoint *ep = NULL;
+
+ if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
+ *group = ISCSI_NL_GRP_UIP;
+ else
+ *group = ISCSI_NL_GRP_ISCSID;
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, host_no,
+ err = iscsi_if_create_session(priv, ep, ev,
ev->u.c_session.initial_cmdsn,
ev->u.c_session.cmds_max,
ev->u.c_session.queue_depth);
break;
case ISCSI_UEVENT_CREATE_BOUND_SESSION:
- err = iscsi_if_create_session(priv, ev,
- ev->u.c_bound_session.host_no,
+ ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
+ if (!ep) {
+ err = -EINVAL;
+ break;
+ }
+
+ err = iscsi_if_create_session(priv, ep, ev,
ev->u.c_bound_session.initial_cmdsn,
ev->u.c_bound_session.cmds_max,
ev->u.c_bound_session.queue_depth);
case ISCSI_UEVENT_UNBIND_SESSION:
session = iscsi_session_lookup(ev->u.d_session.sid);
if (session)
- iscsi_unbind_session(session);
+ scsi_queue_work(iscsi_session_to_shost(session),
+ &session->unbind_work);
else
err = -EINVAL;
break;
case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
case ISCSI_UEVENT_TRANSPORT_EP_POLL:
case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
+ case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
break;
case ISCSI_UEVENT_TGT_DSCVR:
case ISCSI_UEVENT_SET_HOST_PARAM:
err = iscsi_set_host_param(transport, ev);
break;
+ case ISCSI_UEVENT_PATH_UPDATE:
+ err = iscsi_set_path(transport, ev);
+ break;
default:
err = -ENOSYS;
break;
uint32_t rlen;
struct nlmsghdr *nlh;
struct iscsi_uevent *ev;
+ uint32_t group;
nlh = nlmsg_hdr(skb);
if (nlh->nlmsg_len < sizeof(*nlh) ||
if (rlen > skb->len)
rlen = skb->len;
- err = iscsi_if_recv_msg(skb, nlh);
+ err = iscsi_if_recv_msg(skb, nlh, &group);
if (err) {
ev->type = ISCSI_KEVENT_IF_ERROR;
ev->iferror = err;
*/
if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
break;
- err = iscsi_if_send_reply(
- NETLINK_CREDS(skb)->pid, nlh->nlmsg_seq,
+ err = iscsi_if_send_reply(group, nlh->nlmsg_seq,
nlh->nlmsg_type, 0, 0, ev, sizeof(*ev));
} while (err < 0 && err != -ECONNREFUSED);
skb_pull(skb, rlen);
iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
+iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
+iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
+iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0)
static ssize_t
show_priv_session_state(struct device *dev, struct device_attribute *attr,
if (!priv)
return NULL;
INIT_LIST_HEAD(&priv->list);
- priv->daemon_pid = -1;
priv->iscsi_transport = tt;
priv->t.user_scan = iscsi_user_scan;
+ priv->t.create_work_queue = 1;
priv->dev.class = &iscsi_transport_class;
- snprintf(priv->dev.bus_id, BUS_ID_SIZE, "%s", tt->name);
+ dev_set_name(&priv->dev, "%s", tt->name);
err = device_register(&priv->dev);
if (err)
goto free_priv;
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->t.host_size = sizeof(struct iscsi_cls_host);
transport_container_register(&priv->t.host_attrs);
SETUP_HOST_RD_ATTR(netdev, ISCSI_HOST_NETDEV_NAME);
SETUP_SESSION_RD_ATTR(fast_abort, ISCSI_FAST_ABORT);
SETUP_SESSION_RD_ATTR(abort_tmo, ISCSI_ABORT_TMO);
SETUP_SESSION_RD_ATTR(lu_reset_tmo,ISCSI_LU_RESET_TMO);
+ SETUP_SESSION_RD_ATTR(tgt_reset_tmo,ISCSI_TGT_RESET_TMO);
+ SETUP_SESSION_RD_ATTR(ifacename, ISCSI_IFACE_NAME);
+ SETUP_SESSION_RD_ATTR(initiatorname, ISCSI_INITIATOR_NAME);
SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo);
SETUP_PRIV_SESSION_RD_ATTR(state);
unregister_dev:
device_unregister(&priv->dev);
+ return NULL;
free_priv:
kfree(priv);
return NULL;
if (err)
return err;
- err = transport_class_register(&iscsi_host_class);
+ err = class_register(&iscsi_endpoint_class);
if (err)
goto unregister_transport_class;
+ err = transport_class_register(&iscsi_host_class);
+ if (err)
+ goto unregister_endpoint_class;
+
err = transport_class_register(&iscsi_connection_class);
if (err)
goto unregister_host_class;
if (err)
goto unregister_conn_class;
- nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx, NULL,
- THIS_MODULE);
+ nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx,
+ NULL, THIS_MODULE);
if (!nls) {
err = -ENOBUFS;
goto unregister_session_class;
transport_class_unregister(&iscsi_connection_class);
unregister_host_class:
transport_class_unregister(&iscsi_host_class);
+unregister_endpoint_class:
+ class_unregister(&iscsi_endpoint_class);
unregister_transport_class:
class_unregister(&iscsi_transport_class);
return err;
transport_class_unregister(&iscsi_connection_class);
transport_class_unregister(&iscsi_session_class);
transport_class_unregister(&iscsi_host_class);
+ class_unregister(&iscsi_endpoint_class);
class_unregister(&iscsi_transport_class);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff