diff options
Diffstat (limited to 'drivers/scsi/scsi_transport_iscsi.c')
| -rw-r--r-- | drivers/scsi/scsi_transport_iscsi.c | 262 |
1 files changed, 208 insertions, 54 deletions
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c index 10ff0f0210b..72a71ebc9d0 100644 --- a/drivers/scsi/scsi_transport_iscsi.c +++ b/drivers/scsi/scsi_transport_iscsi.c @@ -31,21 +31,13 @@ #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 10 +#define ISCSI_CONN_ATTRS 10 struct iscsi_internal { 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. @@ -223,6 +215,7 @@ 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); } @@ -304,6 +297,7 @@ 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); } @@ -870,6 +864,67 @@ 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_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_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) { @@ -917,12 +972,7 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) err = -EINVAL; break; case ISCSI_UEVENT_SET_PARAM: - conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); - if (conn) - ev->r.retcode = transport->set_param(conn, - ev->u.set_param.param, ev->u.set_param.value); - else - err = -EINVAL; + err = iscsi_set_param(transport, ev); break; case ISCSI_UEVENT_START_CONN: conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); @@ -1028,6 +1078,10 @@ 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 */ @@ -1045,7 +1099,8 @@ 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"); @@ -1053,6 +1108,25 @@ 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"); + +#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) @@ -1074,7 +1148,8 @@ 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"); @@ -1084,18 +1159,88 @@ 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); -#define SETUP_CONN_RD_ATTR(field, param) \ - if (priv->param_mask & (1 << param)) { \ - priv->conn_attrs[count] = &class_device_attr_##field; \ +/* + * 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"); + +#define iscsi_priv_conn_attr_show(field, format) \ +static ssize_t \ +show_priv_conn_##field(struct class_device *cdev, char *buf) \ +{ \ + struct iscsi_cls_conn *conn = iscsi_cdev_to_conn(cdev); \ + return sprintf(buf, format"\n", conn->field); \ +} + +#define iscsi_priv_conn_attr(field, format) \ + iscsi_priv_conn_attr_show(field, format) \ +static ISCSI_CLASS_ATTR(priv_conn, field, S_IRUGO, show_priv_conn_##field, \ + NULL) +iscsi_priv_conn_attr(persistent_address, "%s"); +iscsi_priv_conn_attr(persistent_port, "%d"); + +#define SETUP_PRIV_SESSION_RD_ATTR(field) \ +do { \ + priv->session_attrs[count] = &class_device_attr_priv_sess_##field; \ + count++; \ +} while (0) + +#define SETUP_SESSION_RD_ATTR(field, param_flag) \ +do { \ + if (tt->param_mask & param_flag) { \ + priv->session_attrs[count] = &class_device_attr_sess_##field; \ count++; \ - } + } \ +} while (0) + +#define SETUP_PRIV_CONN_RD_ATTR(field) \ +do { \ + priv->conn_attrs[count] = &class_device_attr_priv_conn_##field; \ + count++; \ +} while (0) + +#define SETUP_CONN_RD_ATTR(field, param_flag) \ +do { \ + if (tt->param_mask & param_flag) { \ + priv->conn_attrs[count] = &class_device_attr_conn_##field; \ + count++; \ + } \ +} while (0) static int iscsi_session_match(struct attribute_container *cont, struct device *dev) @@ -1173,31 +1318,30 @@ 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); - } - /* connection parameters */ priv->conn_cont.ac.attrs = &priv->conn_attrs[0]; priv->conn_cont.ac.class = &iscsi_connection_class.class; priv->conn_cont.ac.match = iscsi_conn_match; transport_container_register(&priv->conn_cont); - SETUP_CONN_RD_ATTR(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); - SETUP_CONN_RD_ATTR(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); - SETUP_CONN_RD_ATTR(header_digest, ISCSI_PARAM_HDRDGST_EN); - SETUP_CONN_RD_ATTR(data_digest, ISCSI_PARAM_DATADGST_EN); - SETUP_CONN_RD_ATTR(ifmarker, ISCSI_PARAM_IFMARKER_EN); - SETUP_CONN_RD_ATTR(ofmarker, ISCSI_PARAM_OFMARKER_EN); + 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); + + 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; @@ -1209,14 +1353,24 @@ 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); + + 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; |