diff options
Diffstat (limited to 'drivers/scsi/scsi_transport_iscsi.c')
| -rw-r--r-- | drivers/scsi/scsi_transport_iscsi.c | 705 |
1 files changed, 500 insertions, 205 deletions
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c index 2730d507e585..5569fdcfd621 100644 --- a/drivers/scsi/scsi_transport_iscsi.c +++ b/drivers/scsi/scsi_transport_iscsi.c @@ -31,31 +31,26 @@ #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; 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 @@ -120,6 +115,24 @@ static struct attribute_group iscsi_transport_group = { .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, @@ -133,7 +146,6 @@ static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, NULL); static struct sock *nls; -static int daemon_pid; static DEFINE_MUTEX(rx_queue_mutex); struct mempool_zone { @@ -165,14 +177,23 @@ 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; } @@ -181,14 +202,17 @@ static struct iscsi_cls_session *iscsi_session_lookup(uint64_t handle) 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; } @@ -209,6 +233,7 @@ static void iscsi_session_release(struct device *dev) shost = iscsi_session_to_shost(session); scsi_host_put(shost); + kfree(session->targetname); kfree(session); module_put(transport->owner); } @@ -218,30 +243,95 @@ static int iscsi_is_session_dev(const struct device *dev) 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 * @transport: iscsi transport * - * This can be called from a LLD or 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) +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 (!try_module_get(transport->owner)) return NULL; - session = kzalloc(sizeof(*session), GFP_KERNEL); + session = kzalloc(sizeof(*session) + transport->sessiondata_size, + GFP_KERNEL); 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); - snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u", shost->host_no); + 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; session->dev.release = iscsi_session_release; err = device_register(&session->dev); @@ -252,6 +342,10 @@ iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport) } transport_register_device(&session->dev); + mutex_lock(&ihost->mutex); + list_add(&session->host_list, &ihost->sessions); + mutex_unlock(&ihost->mutex); + return session; free_session: @@ -272,6 +366,16 @@ EXPORT_SYMBOL_GPL(iscsi_create_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; @@ -284,6 +388,7 @@ static void iscsi_conn_release(struct device *dev) struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); struct device *parent = conn->dev.parent; + kfree(conn->persistent_address); kfree(conn); put_device(parent); } @@ -301,12 +406,16 @@ static int iscsi_is_conn_dev(const 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; @@ -319,12 +428,14 @@ iscsi_create_conn(struct iscsi_cls_session *session, uint32_t cid) 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); @@ -361,105 +472,6 @@ int iscsi_destroy_conn(struct iscsi_cls_conn *conn) 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 * @@ -560,13 +572,13 @@ mempool_zone_get_skb(struct mempool_zone *zone) } 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); @@ -574,6 +586,7 @@ iscsi_unicast_skb(struct mempool_zone *zone, struct sk_buff *skb) } 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); @@ -587,9 +600,14 @@ int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, 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); @@ -600,19 +618,20 @@ int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, 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(conn->z_pdu, skb, priv->daemon_pid); } EXPORT_SYMBOL_GPL(iscsi_recv_pdu); @@ -621,8 +640,13 @@ void iscsi_conn_error(struct iscsi_cls_conn *conn, enum iscsi_err error) 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); @@ -632,16 +656,17 @@ void iscsi_conn_error(struct iscsi_cls_conn *conn, enum iscsi_err 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_unicast_skb(conn->z_error, skb, priv->daemon_pid); dev_printk(KERN_INFO, &conn->dev, "iscsi: detected conn error (%d)\n", error); @@ -671,7 +696,7 @@ iscsi_if_send_reply(int pid, int seq, int type, int done, int multi, 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 @@ -683,13 +708,18 @@ iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 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; @@ -705,7 +735,7 @@ iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 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)); @@ -713,8 +743,10 @@ iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 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)); @@ -729,7 +761,7 @@ iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) 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; @@ -740,16 +772,21 @@ 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; } @@ -760,13 +797,20 @@ iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 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) + @@ -788,7 +832,8 @@ iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) 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); @@ -812,7 +857,7 @@ iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev 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); @@ -832,6 +877,106 @@ iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev 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) { @@ -841,6 +986,7 @@ 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) @@ -850,15 +996,21 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) 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: @@ -868,41 +1020,35 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) 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)), @@ -914,6 +1060,11 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) 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; @@ -923,9 +1074,11 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) 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) { @@ -937,7 +1090,6 @@ 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; @@ -988,6 +1140,10 @@ free_skb: #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 */ @@ -1005,7 +1161,8 @@ show_conn_int_param_##param(struct class_device *cdev, char *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); +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"); @@ -1013,6 +1170,26 @@ iscsi_conn_int_attr(header_digest, ISCSI_PARAM_HDRDGST_EN, "%d"); iscsi_conn_int_attr(data_digest, ISCSI_PARAM_DATADGST_EN, "%d"); iscsi_conn_int_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN, "%d"); iscsi_conn_int_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN, "%d"); +iscsi_conn_int_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT, "%d"); +iscsi_conn_int_attr(port, ISCSI_PARAM_CONN_PORT, "%d"); +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) @@ -1034,7 +1211,8 @@ show_session_int_param_##param(struct class_device *cdev, char *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); +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"); @@ -1044,18 +1222,89 @@ iscsi_session_int_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, "%u"); iscsi_session_int_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, "%d"); iscsi_session_int_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, "%d"); iscsi_session_int_attr(erl, ISCSI_PARAM_ERL, "%d"); +iscsi_session_int_attr(tpgt, ISCSI_PARAM_TPGT, "%d"); -#define 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); + +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 SETUP_CONN_RD_ATTR(field, param) \ - if (priv->param_mask & (1 << param)) { \ - priv->conn_attrs[count] = &class_device_attr_##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) @@ -1104,6 +1353,24 @@ static int iscsi_conn_match(struct attribute_container *cont, 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) { @@ -1122,6 +1389,7 @@ 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); @@ -1133,18 +1401,13 @@ iscsi_register_transport(struct iscsi_transport *tt) 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]; @@ -1152,12 +1415,25 @@ iscsi_register_transport(struct iscsi_transport *tt) 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; @@ -1169,14 +1445,25 @@ iscsi_register_transport(struct iscsi_transport *tt) 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; @@ -1214,6 +1501,7 @@ int iscsi_unregister_transport(struct iscsi_transport *tt) 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); @@ -1257,10 +1545,14 @@ static __init int iscsi_transport_init(void) 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; @@ -1288,6 +1580,8 @@ 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; @@ -1300,6 +1594,7 @@ static void __exit iscsi_transport_exit(void) 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); } |