* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <linux/module.h>
-#include <linux/mempool.h>
#include <linux/mutex.h>
#include <net/tcp.h>
#include <scsi/scsi.h>
#include <scsi/scsi_transport_iscsi.h>
#include <scsi/iscsi_if.h>
-#define ISCSI_SESSION_ATTRS 8
-#define ISCSI_CONN_ATTRS 6
+#define ISCSI_SESSION_ATTRS 11
+#define ISCSI_CONN_ATTRS 11
+#define ISCSI_HOST_ATTRS 0
+#define ISCSI_TRANSPORT_VERSION "2.0-724"
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;
struct class_device_attribute *session_attrs[ISCSI_SESSION_ATTRS + 1];
};
+static int iscsi_session_nr; /* sysfs session id for next new session */
+
/*
* list of registered transports and lock that must
* be held while accessing list. The iscsi_transport_lock must
.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 {
- mempool_t *pool;
- atomic_t allocated;
- int size;
- int hiwat;
- struct list_head freequeue;
- spinlock_t freelock;
-};
-
-static struct mempool_zone *z_reply;
-
-/*
- * Z_MAX_* - actual mempool size allocated at the mempool_zone_init() time
- * Z_HIWAT_* - zone's high watermark when if_error bit will be set to -ENOMEM
- * so daemon will notice OOM on NETLINK tranposrt level and will
- * be able to predict or change operational behavior
- */
-#define Z_MAX_REPLY 8
-#define Z_HIWAT_REPLY 6
-#define Z_MAX_PDU 8
-#define Z_HIWAT_PDU 6
-#define Z_MAX_ERROR 16
-#define Z_HIWAT_ERROR 12
-
static LIST_HEAD(sesslist);
static DEFINE_SPINLOCK(sesslock);
static LIST_HEAD(connlist);
static DEFINE_SPINLOCK(connlock);
-static struct iscsi_cls_session *iscsi_session_lookup(uint64_t handle)
+static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
+{
+ struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
+ return sess->sid;
+}
+
+/*
+ * Returns the matching session to a given sid
+ */
+static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
{
unsigned long flags;
struct iscsi_cls_session *sess;
spin_lock_irqsave(&sesslock, flags);
list_for_each_entry(sess, &sesslist, sess_list) {
- if (sess == iscsi_ptr(handle)) {
+ if (sess->sid == sid) {
spin_unlock_irqrestore(&sesslock, flags);
return sess;
}
return NULL;
}
-static struct iscsi_cls_conn *iscsi_conn_lookup(uint64_t handle)
+/*
+ * Returns the matching connection to a given sid / cid tuple
+ */
+static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
{
unsigned long flags;
struct iscsi_cls_conn *conn;
spin_lock_irqsave(&connlock, flags);
list_for_each_entry(conn, &connlist, conn_list) {
- if (conn == iscsi_ptr(handle)) {
+ if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
spin_unlock_irqrestore(&connlock, flags);
return conn;
}
static void iscsi_session_release(struct device *dev)
{
struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
- struct iscsi_transport *transport = session->transport;
struct Scsi_Host *shost;
shost = iscsi_session_to_shost(session);
scsi_host_put(shost);
kfree(session);
- module_put(transport->owner);
}
static int iscsi_is_session_dev(const struct device *dev)
return dev->release == iscsi_session_release;
}
-/**
- * iscsi_create_session - create iscsi class session
- * @shost: scsi host
- * @transport: iscsi transport
- *
- * This can be called from a LLD or iscsi_transport
- **/
+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 == 0) &&
+ (id == SCAN_WILD_CARD || id == session->target_id))
+ scsi_scan_target(&session->dev, 0,
+ session->target_id, lun, 1);
+ }
+ mutex_unlock(&ihost->mutex);
+
+ return 0;
+}
+
+static void session_recovery_timedout(struct work_struct *work)
+{
+ struct iscsi_cls_session *session =
+ container_of(work, struct iscsi_cls_session,
+ recovery_work.work);
+
+ 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);
+
struct iscsi_cls_session *
-iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport)
+iscsi_alloc_session(struct Scsi_Host *shost,
+ struct iscsi_transport *transport)
{
struct iscsi_cls_session *session;
- int err;
- if (!try_module_get(transport->owner))
+ session = kzalloc(sizeof(*session) + transport->sessiondata_size,
+ GFP_KERNEL);
+ if (!session)
return NULL;
- session = kzalloc(sizeof(*session), GFP_KERNEL);
- if (!session)
- goto module_put;
session->transport = transport;
+ session->recovery_tmo = 120;
+ INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
+ INIT_LIST_HEAD(&session->host_list);
+ INIT_LIST_HEAD(&session->sess_list);
/* 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_session_release;
- err = device_register(&session->dev);
+ device_initialize(&session->dev);
+ if (transport->sessiondata_size)
+ session->dd_data = &session[1];
+ return session;
+}
+EXPORT_SYMBOL_GPL(iscsi_alloc_session);
+
+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;
+ int err;
+
+ ihost = shost->shost_data;
+ session->sid = iscsi_session_nr++;
+ session->target_id = target_id;
+
+ snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u",
+ session->sid);
+ err = device_add(&session->dev);
if (err) {
dev_printk(KERN_ERR, &session->dev, "iscsi: could not "
"register session's dev\n");
- goto free_session;
+ goto release_host;
}
transport_register_device(&session->dev);
- return session;
+ mutex_lock(&ihost->mutex);
+ list_add(&session->host_list, &ihost->sessions);
+ mutex_unlock(&ihost->mutex);
+ return 0;
-free_session:
- kfree(session);
-module_put:
- module_put(transport->owner);
- return NULL;
+release_host:
+ scsi_host_put(shost);
+ return err;
}
+EXPORT_SYMBOL_GPL(iscsi_add_session);
+
+/**
+ * iscsi_create_session - create iscsi class session
+ * @shost: scsi host
+ * @transport: iscsi transport
+ *
+ * This can be called from a LLD or iscsi_transport.
+ **/
+struct iscsi_cls_session *
+iscsi_create_session(struct Scsi_Host *shost,
+ struct iscsi_transport *transport,
+ unsigned int target_id)
+{
+ struct iscsi_cls_session *session;
+
+ session = iscsi_alloc_session(shost, transport);
+ if (!session)
+ return NULL;
+ if (iscsi_add_session(session, target_id)) {
+ iscsi_free_session(session);
+ return NULL;
+ }
+ return session;
+}
EXPORT_SYMBOL_GPL(iscsi_create_session);
+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;
+
+ if (!cancel_delayed_work(&session->recovery_work))
+ flush_scheduled_work();
+
+ mutex_lock(&ihost->mutex);
+ list_del(&session->host_list);
+ mutex_unlock(&ihost->mutex);
+
+ scsi_remove_target(&session->dev);
+
+ transport_unregister_device(&session->dev);
+ device_del(&session->dev);
+}
+EXPORT_SYMBOL_GPL(iscsi_remove_session);
+
+void iscsi_free_session(struct iscsi_cls_session *session)
+{
+ put_device(&session->dev);
+}
+
+EXPORT_SYMBOL_GPL(iscsi_free_session);
+
/**
* iscsi_destroy_session - destroy iscsi session
* @session: iscsi_session
**/
int iscsi_destroy_session(struct iscsi_cls_session *session)
{
- transport_unregister_device(&session->dev);
- device_unregister(&session->dev);
+ iscsi_remove_session(session);
+ iscsi_free_session(session);
return 0;
}
-
EXPORT_SYMBOL_GPL(iscsi_destroy_session);
static void iscsi_conn_release(struct device *dev)
* This can be called from a LLD or iscsi_transport. The connection
* is child of the session so cid must be unique for all connections
* on the session.
+ *
+ * Since we do not support MCS, cid will normally be zero. In some cases
+ * for software iscsi we could be trying to preallocate a connection struct
+ * in which case there could be two connection structs and cid would be
+ * non-zero.
**/
struct iscsi_cls_conn *
iscsi_create_conn(struct iscsi_cls_session *session, uint32_t cid)
{
struct iscsi_transport *transport = session->transport;
- struct Scsi_Host *shost = iscsi_session_to_shost(session);
struct iscsi_cls_conn *conn;
int err;
INIT_LIST_HEAD(&conn->conn_list);
conn->transport = transport;
+ conn->cid = cid;
/* this is released in the dev's release function */
if (!get_device(&session->dev))
goto free_conn;
+
snprintf(conn->dev.bus_id, BUS_ID_SIZE, "connection%d:%u",
- shost->host_no, cid);
+ session->sid, cid);
conn->dev.parent = &session->dev;
conn->dev.release = iscsi_conn_release;
err = device_register(&conn->dev);
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
*/
return NULL;
}
-static inline struct list_head *skb_to_lh(struct sk_buff *skb)
-{
- return (struct list_head *)&skb->cb;
-}
-
-static void*
-mempool_zone_alloc_skb(gfp_t gfp_mask, void *pool_data)
-{
- struct mempool_zone *zone = pool_data;
-
- return alloc_skb(zone->size, gfp_mask);
-}
-
-static void
-mempool_zone_free_skb(void *element, void *pool_data)
-{
- kfree_skb(element);
-}
-
-static void
-mempool_zone_complete(struct mempool_zone *zone)
-{
- unsigned long flags;
- struct list_head *lh, *n;
-
- spin_lock_irqsave(&zone->freelock, flags);
- list_for_each_safe(lh, n, &zone->freequeue) {
- struct sk_buff *skb = (struct sk_buff *)((char *)lh -
- offsetof(struct sk_buff, cb));
- if (!skb_shared(skb)) {
- list_del(skb_to_lh(skb));
- mempool_free(skb, zone->pool);
- atomic_dec(&zone->allocated);
- }
- }
- spin_unlock_irqrestore(&zone->freelock, flags);
-}
-
-static struct mempool_zone *
-mempool_zone_init(unsigned max, unsigned size, unsigned hiwat)
+static int
+iscsi_broadcast_skb(struct sk_buff *skb, gfp_t gfp)
{
- struct mempool_zone *zp;
-
- zp = kzalloc(sizeof(*zp), GFP_KERNEL);
- if (!zp)
- return NULL;
-
- zp->size = size;
- zp->hiwat = hiwat;
- INIT_LIST_HEAD(&zp->freequeue);
- spin_lock_init(&zp->freelock);
- atomic_set(&zp->allocated, 0);
+ int rc;
- zp->pool = mempool_create(max, mempool_zone_alloc_skb,
- mempool_zone_free_skb, zp);
- if (!zp->pool) {
- kfree(zp);
- return NULL;
+ rc = netlink_broadcast(nls, skb, 0, 1, gfp);
+ if (rc < 0) {
+ printk(KERN_ERR "iscsi: can not broadcast skb (%d)\n", rc);
+ return rc;
}
- return zp;
-}
-
-static void mempool_zone_destroy(struct mempool_zone *zp)
-{
- mempool_destroy(zp->pool);
- kfree(zp);
-}
-
-static struct sk_buff*
-mempool_zone_get_skb(struct mempool_zone *zone)
-{
- struct sk_buff *skb;
-
- skb = mempool_alloc(zone->pool, GFP_ATOMIC);
- if (skb)
- atomic_inc(&zone->allocated);
- return skb;
+ return 0;
}
static int
-iscsi_unicast_skb(struct mempool_zone *zone, struct sk_buff *skb)
+iscsi_unicast_skb(struct sk_buff *skb, int pid)
{
- unsigned long flags;
int rc;
- skb_get(skb);
- rc = netlink_unicast(nls, skb, daemon_pid, MSG_DONTWAIT);
+ rc = netlink_unicast(nls, skb, pid, MSG_DONTWAIT);
if (rc < 0) {
- mempool_free(skb, zone->pool);
printk(KERN_ERR "iscsi: can not unicast skb (%d)\n", rc);
return rc;
}
- spin_lock_irqsave(&zone->freelock, flags);
- list_add(skb_to_lh(skb), &zone->freequeue);
- spin_unlock_irqrestore(&zone->freelock, flags);
-
return 0;
}
struct sk_buff *skb;
struct iscsi_uevent *ev;
char *pdu;
+ struct iscsi_internal *priv;
int len = NLMSG_SPACE(sizeof(*ev) + sizeof(struct iscsi_hdr) +
data_size);
- mempool_zone_complete(conn->z_pdu);
+ priv = iscsi_if_transport_lookup(conn->transport);
+ if (!priv)
+ return -EINVAL;
- skb = mempool_zone_get_skb(conn->z_pdu);
+ skb = alloc_skb(len, GFP_ATOMIC);
if (!skb) {
iscsi_conn_error(conn, ISCSI_ERR_CONN_FAILED);
dev_printk(KERN_ERR, &conn->dev, "iscsi: can not deliver "
return -ENOMEM;
}
- nlh = __nlmsg_put(skb, daemon_pid, 0, 0, (len - sizeof(*nlh)), 0);
+ nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0);
ev = NLMSG_DATA(nlh);
memset(ev, 0, sizeof(*ev));
ev->transport_handle = iscsi_handle(conn->transport);
ev->type = ISCSI_KEVENT_RECV_PDU;
- if (atomic_read(&conn->z_pdu->allocated) >= conn->z_pdu->hiwat)
- ev->iferror = -ENOMEM;
- ev->r.recv_req.conn_handle = iscsi_handle(conn);
+ ev->r.recv_req.cid = conn->cid;
+ ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
pdu = (char*)ev + sizeof(*ev);
memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
- return iscsi_unicast_skb(conn->z_pdu, skb);
+ return iscsi_unicast_skb(skb, priv->daemon_pid);
}
EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
struct nlmsghdr *nlh;
struct sk_buff *skb;
struct iscsi_uevent *ev;
+ struct iscsi_internal *priv;
int len = NLMSG_SPACE(sizeof(*ev));
- mempool_zone_complete(conn->z_error);
+ priv = iscsi_if_transport_lookup(conn->transport);
+ if (!priv)
+ return;
- skb = mempool_zone_get_skb(conn->z_error);
+ skb = alloc_skb(len, GFP_ATOMIC);
if (!skb) {
dev_printk(KERN_ERR, &conn->dev, "iscsi: gracefully ignored "
"conn error (%d)\n", error);
return;
}
- nlh = __nlmsg_put(skb, daemon_pid, 0, 0, (len - sizeof(*nlh)), 0);
+ nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0);
ev = NLMSG_DATA(nlh);
ev->transport_handle = iscsi_handle(conn->transport);
ev->type = ISCSI_KEVENT_CONN_ERROR;
- if (atomic_read(&conn->z_error->allocated) >= conn->z_error->hiwat)
- ev->iferror = -ENOMEM;
ev->r.connerror.error = error;
- ev->r.connerror.conn_handle = iscsi_handle(conn);
+ ev->r.connerror.cid = conn->cid;
+ ev->r.connerror.sid = iscsi_conn_get_sid(conn);
- iscsi_unicast_skb(conn->z_error, skb);
+ iscsi_broadcast_skb(skb, GFP_ATOMIC);
dev_printk(KERN_INFO, &conn->dev, "iscsi: detected conn error (%d)\n",
error);
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);
+ skb = alloc_skb(len, GFP_ATOMIC);
/*
* FIXME:
* user is supposed to react on iferror == -ENOMEM;
nlh = __nlmsg_put(skb, pid, seq, t, (len - sizeof(*nlh)), 0);
nlh->nlmsg_flags = flags;
memcpy(NLMSG_DATA(nlh), payload, size);
- return iscsi_unicast_skb(z_reply, skb);
+ return iscsi_unicast_skb(skb, pid);
}
static int
struct iscsi_cls_conn *conn;
struct nlmsghdr *nlhstat;
struct iscsi_uevent *evstat;
+ struct iscsi_internal *priv;
int len = NLMSG_SPACE(sizeof(*ev) +
sizeof(struct iscsi_stats) +
sizeof(struct iscsi_stats_custom) *
ISCSI_STATS_CUSTOM_MAX);
int err = 0;
- conn = iscsi_conn_lookup(ev->u.get_stats.conn_handle);
+ priv = iscsi_if_transport_lookup(transport);
+ if (!priv)
+ return -EINVAL;
+
+ conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
if (!conn)
return -EEXIST;
do {
int actual_size;
- mempool_zone_complete(conn->z_pdu);
-
- skbstat = mempool_zone_get_skb(conn->z_pdu);
+ skbstat = alloc_skb(len, GFP_ATOMIC);
if (!skbstat) {
dev_printk(KERN_ERR, &conn->dev, "iscsi: can not "
"deliver stats: OOM\n");
return -ENOMEM;
}
- nlhstat = __nlmsg_put(skbstat, daemon_pid, 0, 0,
+ nlhstat = __nlmsg_put(skbstat, priv->daemon_pid, 0, 0,
(len - sizeof(*nlhstat)), 0);
evstat = NLMSG_DATA(nlhstat);
memset(evstat, 0, sizeof(*evstat));
evstat->transport_handle = iscsi_handle(conn->transport);
evstat->type = nlh->nlmsg_type;
- if (atomic_read(&conn->z_pdu->allocated) >= conn->z_pdu->hiwat)
- evstat->iferror = -ENOMEM;
- evstat->u.get_stats.conn_handle =
- ev->u.get_stats.conn_handle;
+ evstat->u.get_stats.cid =
+ ev->u.get_stats.cid;
+ evstat->u.get_stats.sid =
+ ev->u.get_stats.sid;
stats = (struct iscsi_stats *)
((char*)evstat + sizeof(*evstat));
memset(stats, 0, sizeof(*stats));
skb_trim(skbstat, NLMSG_ALIGN(actual_size));
nlhstat->nlmsg_len = actual_size;
- err = iscsi_unicast_skb(conn->z_pdu, skbstat);
+ err = iscsi_unicast_skb(skbstat, priv->daemon_pid);
} while (err < 0 && err != -ECONNREFUSED);
return err;
}
+/**
+ * iscsi_if_destroy_session_done - send session destr. completion event
+ * @conn: last connection for session
+ *
+ * This is called by HW iscsi LLDs to notify userpsace that its HW has
+ * removed a session.
+ **/
+int iscsi_if_destroy_session_done(struct iscsi_cls_conn *conn)
+{
+ struct iscsi_internal *priv;
+ struct iscsi_cls_session *session;
+ struct Scsi_Host *shost;
+ struct iscsi_uevent *ev;
+ struct sk_buff *skb;
+ struct nlmsghdr *nlh;
+ unsigned long flags;
+ int rc, len = NLMSG_SPACE(sizeof(*ev));
+
+ priv = iscsi_if_transport_lookup(conn->transport);
+ if (!priv)
+ return -EINVAL;
+
+ session = iscsi_dev_to_session(conn->dev.parent);
+ shost = iscsi_session_to_shost(session);
+
+ skb = alloc_skb(len, GFP_KERNEL);
+ if (!skb) {
+ dev_printk(KERN_ERR, &conn->dev, "Cannot notify userspace of "
+ "session creation event\n");
+ return -ENOMEM;
+ }
+
+ 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_DESTROY_SESSION;
+ ev->r.d_session.host_no = shost->host_no;
+ ev->r.d_session.sid = session->sid;
+
+ /*
+ * 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)
+ dev_printk(KERN_ERR, &conn->dev, "Cannot notify userspace of "
+ "session destruction event. Check iscsi daemon\n");
+
+ spin_lock_irqsave(&sesslock, flags);
+ list_del(&session->sess_list);
+ spin_unlock_irqrestore(&sesslock, flags);
+
+ spin_lock_irqsave(&connlock, flags);
+ conn->active = 0;
+ list_del(&conn->conn_list);
+ spin_unlock_irqrestore(&connlock, flags);
+
+ return rc;
+}
+EXPORT_SYMBOL_GPL(iscsi_if_destroy_session_done);
+
+/**
+ * iscsi_if_create_session_done - send session creation completion event
+ * @conn: leading connection for session
+ *
+ * This is called by HW iscsi LLDs to notify userpsace that its HW has
+ * created a session or a existing session is back in the logged in state.
+ **/
+int iscsi_if_create_session_done(struct iscsi_cls_conn *conn)
+{
+ struct iscsi_internal *priv;
+ struct iscsi_cls_session *session;
+ struct Scsi_Host *shost;
+ struct iscsi_uevent *ev;
+ struct sk_buff *skb;
+ struct nlmsghdr *nlh;
+ unsigned long flags;
+ int rc, len = NLMSG_SPACE(sizeof(*ev));
+
+ priv = iscsi_if_transport_lookup(conn->transport);
+ if (!priv)
+ return -EINVAL;
+
+ session = iscsi_dev_to_session(conn->dev.parent);
+ shost = iscsi_session_to_shost(session);
+
+ skb = alloc_skb(len, GFP_KERNEL);
+ if (!skb) {
+ dev_printk(KERN_ERR, &conn->dev, "Cannot notify userspace of "
+ "session creation event\n");
+ return -ENOMEM;
+ }
+
+ 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_UEVENT_CREATE_SESSION;
+ ev->r.c_session_ret.host_no = shost->host_no;
+ ev->r.c_session_ret.sid = session->sid;
+
+ /*
+ * 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)
+ dev_printk(KERN_ERR, &conn->dev, "Cannot notify userspace of "
+ "session creation event. Check iscsi daemon\n");
+
+ spin_lock_irqsave(&sesslock, flags);
+ list_add(&session->sess_list, &sesslist);
+ spin_unlock_irqrestore(&sesslock, flags);
+
+ spin_lock_irqsave(&connlock, flags);
+ list_add(&conn->conn_list, &connlist);
+ conn->active = 1;
+ spin_unlock_irqrestore(&connlock, flags);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(iscsi_if_create_session_done);
+
static int
iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_uevent *ev)
{
struct iscsi_transport *transport = priv->iscsi_transport;
struct iscsi_cls_session *session;
- uint32_t sid;
+ 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,
- &sid);
+ &hostno);
if (!session)
return -ENOMEM;
- ev->r.c_session_ret.session_handle = iscsi_handle(session);
- ev->r.c_session_ret.sid = sid;
+ 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;
}
struct iscsi_cls_session *session;
unsigned long flags;
- session = iscsi_session_lookup(ev->u.c_conn.session_handle);
- if (!session)
+ session = iscsi_session_lookup(ev->u.c_conn.sid);
+ if (!session) {
+ printk(KERN_ERR "iscsi: invalid session %d\n",
+ ev->u.c_conn.sid);
return -EINVAL;
+ }
conn = transport->create_conn(session, ev->u.c_conn.cid);
- if (!conn)
+ if (!conn) {
+ printk(KERN_ERR "iscsi: couldn't create a new "
+ "connection for session %d\n",
+ session->sid);
return -ENOMEM;
-
- conn->z_pdu = mempool_zone_init(Z_MAX_PDU,
- NLMSG_SPACE(sizeof(struct iscsi_uevent) +
- sizeof(struct iscsi_hdr) +
- DEFAULT_MAX_RECV_DATA_SEGMENT_LENGTH),
- Z_HIWAT_PDU);
- if (!conn->z_pdu) {
- dev_printk(KERN_ERR, &conn->dev, "iscsi: can not allocate "
- "pdu zone for new conn\n");
- goto destroy_conn;
}
- conn->z_error = mempool_zone_init(Z_MAX_ERROR,
- NLMSG_SPACE(sizeof(struct iscsi_uevent)),
- Z_HIWAT_ERROR);
- if (!conn->z_error) {
- dev_printk(KERN_ERR, &conn->dev, "iscsi: can not allocate "
- "error zone for new conn\n");
- goto free_pdu_pool;
- }
-
- ev->r.handle = iscsi_handle(conn);
+ ev->r.c_conn_ret.sid = session->sid;
+ ev->r.c_conn_ret.cid = conn->cid;
spin_lock_irqsave(&connlock, flags);
list_add(&conn->conn_list, &connlist);
spin_unlock_irqrestore(&connlock, flags);
return 0;
-
-free_pdu_pool:
- mempool_zone_destroy(conn->z_pdu);
-destroy_conn:
- if (transport->destroy_conn)
- transport->destroy_conn(conn->dd_data);
- return -ENOMEM;
}
static int
{
unsigned long flags;
struct iscsi_cls_conn *conn;
- struct mempool_zone *z_error, *z_pdu;
- conn = iscsi_conn_lookup(ev->u.d_conn.conn_handle);
+ conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
if (!conn)
return -EINVAL;
spin_lock_irqsave(&connlock, flags);
list_del(&conn->conn_list);
spin_unlock_irqrestore(&connlock, flags);
- z_pdu = conn->z_pdu;
- z_error = conn->z_error;
-
if (transport->destroy_conn)
transport->destroy_conn(conn);
+ return 0;
+}
+
+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, value = 0;
- mempool_zone_destroy(z_pdu);
- mempool_zone_destroy(z_error);
+ 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;
- 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;
+ break;
+ default:
+ err = transport->set_param(conn, ev->u.set_param.param,
+ data, ev->u.set_param.len);
+ }
+
+ 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_tgt_dscvr(struct iscsi_transport *transport,
+ struct iscsi_uevent *ev)
+{
+ struct sockaddr *dst_addr;
+
+ if (!transport->tgt_dscvr)
+ return -EINVAL;
+
+ dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
+ return transport->tgt_dscvr(ev->u.tgt_dscvr.type,
+ ev->u.tgt_dscvr.host_no,
+ ev->u.tgt_dscvr.enable, dst_addr);
}
static int
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.session_handle);
- if (session)
+ session = iscsi_session_lookup(ev->u.d_session.sid);
+ if (session) {
+ spin_lock_irqsave(&sesslock, flags);
+ list_del(&session->sess_list);
+ spin_unlock_irqrestore(&sesslock, flags);
+
transport->destroy_session(session);
- else
+ } else
err = -EINVAL;
break;
case ISCSI_UEVENT_CREATE_CONN:
err = iscsi_if_destroy_conn(transport, ev);
break;
case ISCSI_UEVENT_BIND_CONN:
- session = iscsi_session_lookup(ev->u.b_conn.session_handle);
- conn = iscsi_conn_lookup(ev->u.b_conn.conn_handle);
+ session = iscsi_session_lookup(ev->u.b_conn.sid);
+ conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
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.conn_handle);
- 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.conn_handle);
+ conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
if (conn)
ev->r.retcode = transport->start_conn(conn);
else
err = -EINVAL;
-
break;
case ISCSI_UEVENT_STOP_CONN:
- conn = iscsi_conn_lookup(ev->u.stop_conn.conn_handle);
+ conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
if (conn)
transport->stop_conn(conn, ev->u.stop_conn.flag);
else
err = -EINVAL;
break;
case ISCSI_UEVENT_SEND_PDU:
- conn = iscsi_conn_lookup(ev->u.send_pdu.conn_handle);
+ conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
if (conn)
ev->r.retcode = transport->send_pdu(conn,
(struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
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;
+ case ISCSI_UEVENT_TGT_DSCVR:
+ err = iscsi_tgt_dscvr(transport, ev);
+ 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
- * or invalid creds discarded silently. */
+/*
+ * Get message from skb (based on rtnetlink_rcv_skb). Each message is
+ * processed by iscsi_if_recv_msg. Malformed skbs with wrong lengths or
+ * invalid creds are discarded silently.
+ */
static void
iscsi_if_rx(struct sock *sk, int len)
{
skb_pull(skb, skb->len);
goto free_skb;
}
- daemon_pid = NETLINK_CREDS(skb)->pid;
while (skb->len >= NLMSG_SPACE(0)) {
int err;
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);
}
#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_show(param, format) \
+#define iscsi_conn_attr_show(param) \
static ssize_t \
-show_conn_int_param_##param(struct class_device *cdev, char *buf) \
+show_conn_param_##param(struct class_device *cdev, char *buf) \
{ \
- uint32_t value = 0; \
struct iscsi_cls_conn *conn = iscsi_cdev_to_conn(cdev); \
struct iscsi_transport *t = conn->transport; \
- \
- t->get_conn_param(conn, param, &value); \
- return snprintf(buf, 20, format"\n", value); \
+ return t->get_conn_param(conn, param, buf); \
}
-#define iscsi_conn_int_attr(field, param, format) \
- iscsi_conn_int_attr_show(param, format) \
-static 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");
+#define iscsi_conn_attr(field, param) \
+ iscsi_conn_attr_show(param) \
+static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
+ NULL);
+
+iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
+iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
+iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
+iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
+iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
+iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
+iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
+iscsi_conn_attr(port, ISCSI_PARAM_CONN_PORT);
+iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
+iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
+iscsi_conn_attr(address, ISCSI_PARAM_CONN_ADDRESS);
#define iscsi_cdev_to_session(_cdev) \
iscsi_dev_to_session(_cdev->dev)
/*
* iSCSI session attrs
*/
-#define iscsi_session_int_attr_show(param, format) \
+#define iscsi_session_attr_show(param) \
static ssize_t \
-show_session_int_param_##param(struct class_device *cdev, char *buf) \
+show_session_param_##param(struct class_device *cdev, char *buf) \
{ \
- uint32_t value = 0; \
- struct iscsi_cls_session *session = iscsi_cdev_to_session(cdev); \
+ struct iscsi_cls_session *session = iscsi_cdev_to_session(cdev); \
struct iscsi_transport *t = session->transport; \
- \
- t->get_session_param(session, param, &value); \
- return snprintf(buf, 20, format"\n", value); \
+ return t->get_session_param(session, param, buf); \
}
-#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_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, param) \
- if (priv->param_mask & (1 << param)) { \
- priv->session_attrs[count] = &class_device_attr_##field;\
+#define iscsi_session_attr(field, param) \
+ iscsi_session_attr_show(param) \
+static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
+ NULL);
+
+iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME);
+iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN);
+iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T);
+iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN);
+iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST);
+iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST);
+iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN);
+iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN);
+iscsi_session_attr(erl, ISCSI_PARAM_ERL);
+iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT);
+
+#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(recovery_tmo, "%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_CONN_RD_ATTR(field, param) \
- if (priv->param_mask & (1 << param)) { \
- priv->conn_attrs[count] = &class_device_attr_##field; \
+#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)
{
if (priv)
return NULL;
- priv = kmalloc(sizeof(*priv), GFP_KERNEL);
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
return NULL;
- memset(priv, 0, sizeof(*priv));
INIT_LIST_HEAD(&priv->list);
+ priv->daemon_pid = -1;
priv->iscsi_transport = tt;
+ priv->t.user_scan = iscsi_user_scan;
priv->cdev.class = &iscsi_transport_class;
snprintf(priv->cdev.class_id, BUS_ID_SIZE, "%s", tt->name);
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);
+ SETUP_CONN_RD_ATTR(persistent_address, ISCSI_PERSISTENT_ADDRESS);
+ SETUP_CONN_RD_ATTR(persistent_port, ISCSI_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_SESSION_RD_ATTR(targetname, ISCSI_TARGET_NAME);
+ SETUP_SESSION_RD_ATTR(tpgt, ISCSI_TPGT);
+ SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo);
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);
}
EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
-static int
-iscsi_rcv_nl_event(struct notifier_block *this, unsigned long event, void *ptr)
-{
- struct netlink_notify *n = ptr;
-
- if (event == NETLINK_URELEASE &&
- n->protocol == NETLINK_ISCSI && n->pid) {
- struct iscsi_cls_conn *conn;
- unsigned long flags;
-
- mempool_zone_complete(z_reply);
- spin_lock_irqsave(&connlock, flags);
- list_for_each_entry(conn, &connlist, conn_list) {
- mempool_zone_complete(conn->z_error);
- mempool_zone_complete(conn->z_pdu);
- }
- spin_unlock_irqrestore(&connlock, flags);
- }
-
- return NOTIFY_DONE;
-}
-
-static struct notifier_block iscsi_nl_notifier = {
- .notifier_call = iscsi_rcv_nl_event,
-};
-
static __init int iscsi_transport_init(void)
{
int err;
+ printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
+ ISCSI_TRANSPORT_VERSION);
+
err = class_register(&iscsi_transport_class);
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_session_class);
+ err = transport_class_register(&iscsi_connection_class);
if (err)
- goto unregister_conn_class;
+ goto unregister_host_class;
- err = netlink_register_notifier(&iscsi_nl_notifier);
+ err = transport_class_register(&iscsi_session_class);
if (err)
- goto unregister_session_class;
+ goto unregister_conn_class;
nls = netlink_kernel_create(NETLINK_ISCSI, 1, iscsi_if_rx,
THIS_MODULE);
if (!nls) {
err = -ENOBUFS;
- goto unregister_notifier;
+ goto unregister_session_class;
}
- z_reply = mempool_zone_init(Z_MAX_REPLY,
- NLMSG_SPACE(sizeof(struct iscsi_uevent)), Z_HIWAT_REPLY);
- if (z_reply)
- return 0;
+ 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_host_class:
+ transport_class_unregister(&iscsi_host_class);
unregister_transport_class:
class_unregister(&iscsi_transport_class);
return err;
static void __exit iscsi_transport_exit(void)
{
- mempool_zone_destroy(z_reply);
sock_release(nls->sk_socket);
- 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);
}
"Alex Aizman <itn780@yahoo.com>");
MODULE_DESCRIPTION("iSCSI Transport Interface");
MODULE_LICENSE("GPL");
+MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
git://git.onelab.eu / linux-2.6.git / blobdiff