[SCSI] scsi_transport_iscsi: Add flash node mgmt support
This patch allows iscsiadm to manage iSCSI target information stored on
adapter flash on per host basis.
The sysfs entries will look as cited below:
/sys/bus/iscsi_flashnode/devices/flashnode_sess-<host_no>:<flashnode_id>/<session attrs>
/sys/bus/iscsi_flashnode/devices/flashnode_conn-<host_no>:<flashnode_id>:<conn_id>/<conn attrs>
Signed-off-by: Adheer Chandravanshi <adheer.chandravanshi@qlogic.com>
Signed-off-by: Manish Rangankar <manish.rangankar@qlogic.com>
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index 0a74b97..ce06e87 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -25,6 +25,7 @@
#include <linux/slab.h>
#include <linux/bsg-lib.h>
#include <linux/idr.h>
+#include <linux/list.h>
#include <net/tcp.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
@@ -460,6 +461,689 @@
EXPORT_SYMBOL_GPL(iscsi_destroy_iface);
/*
+ * Interface to display flash node params to sysfs
+ */
+
+#define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \
+struct device_attribute dev_attr_##_prefix##_##_name = \
+ __ATTR(_name, _mode, _show, _store)
+
+/* flash node session attrs show */
+#define iscsi_flashnode_sess_attr_show(type, name, param) \
+static ssize_t \
+show_##type##_##name(struct device *dev, struct device_attribute *attr, \
+ char *buf) \
+{ \
+ struct iscsi_bus_flash_session *fnode_sess = \
+ iscsi_dev_to_flash_session(dev);\
+ struct iscsi_transport *t = fnode_sess->transport; \
+ return t->get_flashnode_param(fnode_sess, param, buf); \
+} \
+
+
+#define iscsi_flashnode_sess_attr(type, name, param) \
+ iscsi_flashnode_sess_attr_show(type, name, param) \
+static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
+ show_##type##_##name, NULL);
+
+/* Flash node session attributes */
+
+iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable,
+ ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE);
+iscsi_flashnode_sess_attr(fnode, discovery_session,
+ ISCSI_FLASHNODE_DISCOVERY_SESS);
+iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE);
+iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN);
+iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN);
+iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN);
+iscsi_flashnode_sess_attr(fnode, data_seq_in_order,
+ ISCSI_FLASHNODE_DATASEQ_INORDER);
+iscsi_flashnode_sess_attr(fnode, data_pdu_in_order,
+ ISCSI_FLASHNODE_PDU_INORDER);
+iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN);
+iscsi_flashnode_sess_attr(fnode, discovery_logout,
+ ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN);
+iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN);
+iscsi_flashnode_sess_attr(fnode, discovery_auth_optional,
+ ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL);
+iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL);
+iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST);
+iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT);
+iscsi_flashnode_sess_attr(fnode, def_time2retain,
+ ISCSI_FLASHNODE_DEF_TIME2RETAIN);
+iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T);
+iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID);
+iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID);
+iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST);
+iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo,
+ ISCSI_FLASHNODE_DEF_TASKMGMT_TMO);
+iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS);
+iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME);
+iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT);
+iscsi_flashnode_sess_attr(fnode, discovery_parent_idx,
+ ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX);
+iscsi_flashnode_sess_attr(fnode, discovery_parent_type,
+ ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE);
+iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX);
+iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX);
+iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME);
+iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN);
+iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD);
+iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN);
+iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT);
+
+static struct attribute *iscsi_flashnode_sess_attrs[] = {
+ &dev_attr_fnode_auto_snd_tgt_disable.attr,
+ &dev_attr_fnode_discovery_session.attr,
+ &dev_attr_fnode_portal_type.attr,
+ &dev_attr_fnode_entry_enable.attr,
+ &dev_attr_fnode_immediate_data.attr,
+ &dev_attr_fnode_initial_r2t.attr,
+ &dev_attr_fnode_data_seq_in_order.attr,
+ &dev_attr_fnode_data_pdu_in_order.attr,
+ &dev_attr_fnode_chap_auth.attr,
+ &dev_attr_fnode_discovery_logout.attr,
+ &dev_attr_fnode_bidi_chap.attr,
+ &dev_attr_fnode_discovery_auth_optional.attr,
+ &dev_attr_fnode_erl.attr,
+ &dev_attr_fnode_first_burst_len.attr,
+ &dev_attr_fnode_def_time2wait.attr,
+ &dev_attr_fnode_def_time2retain.attr,
+ &dev_attr_fnode_max_outstanding_r2t.attr,
+ &dev_attr_fnode_isid.attr,
+ &dev_attr_fnode_tsid.attr,
+ &dev_attr_fnode_max_burst_len.attr,
+ &dev_attr_fnode_def_taskmgmt_tmo.attr,
+ &dev_attr_fnode_targetalias.attr,
+ &dev_attr_fnode_targetname.attr,
+ &dev_attr_fnode_tpgt.attr,
+ &dev_attr_fnode_discovery_parent_idx.attr,
+ &dev_attr_fnode_discovery_parent_type.attr,
+ &dev_attr_fnode_chap_in_idx.attr,
+ &dev_attr_fnode_chap_out_idx.attr,
+ &dev_attr_fnode_username.attr,
+ &dev_attr_fnode_username_in.attr,
+ &dev_attr_fnode_password.attr,
+ &dev_attr_fnode_password_in.attr,
+ &dev_attr_fnode_is_boot_target.attr,
+ NULL,
+};
+
+static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj,
+ struct attribute *attr,
+ int i)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct iscsi_bus_flash_session *fnode_sess =
+ iscsi_dev_to_flash_session(dev);
+ struct iscsi_transport *t = fnode_sess->transport;
+ int param;
+
+ if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) {
+ param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE;
+ } else if (attr == &dev_attr_fnode_discovery_session.attr) {
+ param = ISCSI_FLASHNODE_DISCOVERY_SESS;
+ } else if (attr == &dev_attr_fnode_portal_type.attr) {
+ param = ISCSI_FLASHNODE_PORTAL_TYPE;
+ } else if (attr == &dev_attr_fnode_entry_enable.attr) {
+ param = ISCSI_FLASHNODE_ENTRY_EN;
+ } else if (attr == &dev_attr_fnode_immediate_data.attr) {
+ param = ISCSI_FLASHNODE_IMM_DATA_EN;
+ } else if (attr == &dev_attr_fnode_initial_r2t.attr) {
+ param = ISCSI_FLASHNODE_INITIAL_R2T_EN;
+ } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) {
+ param = ISCSI_FLASHNODE_DATASEQ_INORDER;
+ } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) {
+ param = ISCSI_FLASHNODE_PDU_INORDER;
+ } else if (attr == &dev_attr_fnode_chap_auth.attr) {
+ param = ISCSI_FLASHNODE_CHAP_AUTH_EN;
+ } else if (attr == &dev_attr_fnode_discovery_logout.attr) {
+ param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN;
+ } else if (attr == &dev_attr_fnode_bidi_chap.attr) {
+ param = ISCSI_FLASHNODE_BIDI_CHAP_EN;
+ } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) {
+ param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL;
+ } else if (attr == &dev_attr_fnode_erl.attr) {
+ param = ISCSI_FLASHNODE_ERL;
+ } else if (attr == &dev_attr_fnode_first_burst_len.attr) {
+ param = ISCSI_FLASHNODE_FIRST_BURST;
+ } else if (attr == &dev_attr_fnode_def_time2wait.attr) {
+ param = ISCSI_FLASHNODE_DEF_TIME2WAIT;
+ } else if (attr == &dev_attr_fnode_def_time2retain.attr) {
+ param = ISCSI_FLASHNODE_DEF_TIME2RETAIN;
+ } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) {
+ param = ISCSI_FLASHNODE_MAX_R2T;
+ } else if (attr == &dev_attr_fnode_isid.attr) {
+ param = ISCSI_FLASHNODE_ISID;
+ } else if (attr == &dev_attr_fnode_tsid.attr) {
+ param = ISCSI_FLASHNODE_TSID;
+ } else if (attr == &dev_attr_fnode_max_burst_len.attr) {
+ param = ISCSI_FLASHNODE_MAX_BURST;
+ } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) {
+ param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO;
+ } else if (attr == &dev_attr_fnode_targetalias.attr) {
+ param = ISCSI_FLASHNODE_ALIAS;
+ } else if (attr == &dev_attr_fnode_targetname.attr) {
+ param = ISCSI_FLASHNODE_NAME;
+ } else if (attr == &dev_attr_fnode_tpgt.attr) {
+ param = ISCSI_FLASHNODE_TPGT;
+ } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) {
+ param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX;
+ } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) {
+ param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE;
+ } else if (attr == &dev_attr_fnode_chap_in_idx.attr) {
+ param = ISCSI_FLASHNODE_CHAP_IN_IDX;
+ } else if (attr == &dev_attr_fnode_chap_out_idx.attr) {
+ param = ISCSI_FLASHNODE_CHAP_OUT_IDX;
+ } else if (attr == &dev_attr_fnode_username.attr) {
+ param = ISCSI_FLASHNODE_USERNAME;
+ } else if (attr == &dev_attr_fnode_username_in.attr) {
+ param = ISCSI_FLASHNODE_USERNAME_IN;
+ } else if (attr == &dev_attr_fnode_password.attr) {
+ param = ISCSI_FLASHNODE_PASSWORD;
+ } else if (attr == &dev_attr_fnode_password_in.attr) {
+ param = ISCSI_FLASHNODE_PASSWORD_IN;
+ } else if (attr == &dev_attr_fnode_is_boot_target.attr) {
+ param = ISCSI_FLASHNODE_IS_BOOT_TGT;
+ } else {
+ WARN_ONCE(1, "Invalid flashnode session attr");
+ return 0;
+ }
+
+ return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
+}
+
+static struct attribute_group iscsi_flashnode_sess_attr_group = {
+ .attrs = iscsi_flashnode_sess_attrs,
+ .is_visible = iscsi_flashnode_sess_attr_is_visible,
+};
+
+static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = {
+ &iscsi_flashnode_sess_attr_group,
+ NULL,
+};
+
+static void iscsi_flashnode_sess_release(struct device *dev)
+{
+ struct iscsi_bus_flash_session *fnode_sess =
+ iscsi_dev_to_flash_session(dev);
+
+ kfree(fnode_sess->targetname);
+ kfree(fnode_sess->targetalias);
+ kfree(fnode_sess->portal_type);
+ kfree(fnode_sess);
+}
+
+struct device_type iscsi_flashnode_sess_dev_type = {
+ .name = "iscsi_flashnode_sess_dev_type",
+ .groups = iscsi_flashnode_sess_attr_groups,
+ .release = iscsi_flashnode_sess_release,
+};
+
+/* flash node connection attrs show */
+#define iscsi_flashnode_conn_attr_show(type, name, param) \
+static ssize_t \
+show_##type##_##name(struct device *dev, struct device_attribute *attr, \
+ char *buf) \
+{ \
+ struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\
+ struct iscsi_bus_flash_session *fnode_sess = \
+ iscsi_flash_conn_to_flash_session(fnode_conn);\
+ struct iscsi_transport *t = fnode_conn->transport; \
+ return t->get_flashnode_param(fnode_sess, param, buf); \
+} \
+
+
+#define iscsi_flashnode_conn_attr(type, name, param) \
+ iscsi_flashnode_conn_attr_show(type, name, param) \
+static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
+ show_##type##_##name, NULL);
+
+/* Flash node connection attributes */
+
+iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6,
+ ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6);
+iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN);
+iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN);
+iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN);
+iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat,
+ ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT);
+iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable,
+ ISCSI_FLASHNODE_TCP_NAGLE_DISABLE);
+iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable,
+ ISCSI_FLASHNODE_TCP_WSF_DISABLE);
+iscsi_flashnode_conn_attr(fnode, tcp_timer_scale,
+ ISCSI_FLASHNODE_TCP_TIMER_SCALE);
+iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable,
+ ISCSI_FLASHNODE_TCP_TIMESTAMP_EN);
+iscsi_flashnode_conn_attr(fnode, fragment_disable,
+ ISCSI_FLASHNODE_IP_FRAG_DISABLE);
+iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO);
+iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT);
+iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR);
+iscsi_flashnode_conn_attr(fnode, max_recv_dlength,
+ ISCSI_FLASHNODE_MAX_RECV_DLENGTH);
+iscsi_flashnode_conn_attr(fnode, max_xmit_dlength,
+ ISCSI_FLASHNODE_MAX_XMIT_DLENGTH);
+iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT);
+iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS);
+iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC);
+iscsi_flashnode_conn_attr(fnode, ipv6_flow_label,
+ ISCSI_FLASHNODE_IPV6_FLOW_LABEL);
+iscsi_flashnode_conn_attr(fnode, redirect_ipaddr,
+ ISCSI_FLASHNODE_REDIRECT_IPADDR);
+iscsi_flashnode_conn_attr(fnode, max_segment_size,
+ ISCSI_FLASHNODE_MAX_SEGMENT_SIZE);
+iscsi_flashnode_conn_attr(fnode, link_local_ipv6,
+ ISCSI_FLASHNODE_LINK_LOCAL_IPV6);
+iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF);
+iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF);
+iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN);
+iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN);
+
+static struct attribute *iscsi_flashnode_conn_attrs[] = {
+ &dev_attr_fnode_is_fw_assigned_ipv6.attr,
+ &dev_attr_fnode_header_digest.attr,
+ &dev_attr_fnode_data_digest.attr,
+ &dev_attr_fnode_snack_req.attr,
+ &dev_attr_fnode_tcp_timestamp_stat.attr,
+ &dev_attr_fnode_tcp_nagle_disable.attr,
+ &dev_attr_fnode_tcp_wsf_disable.attr,
+ &dev_attr_fnode_tcp_timer_scale.attr,
+ &dev_attr_fnode_tcp_timestamp_enable.attr,
+ &dev_attr_fnode_fragment_disable.attr,
+ &dev_attr_fnode_max_recv_dlength.attr,
+ &dev_attr_fnode_max_xmit_dlength.attr,
+ &dev_attr_fnode_keepalive_tmo.attr,
+ &dev_attr_fnode_port.attr,
+ &dev_attr_fnode_ipaddress.attr,
+ &dev_attr_fnode_redirect_ipaddr.attr,
+ &dev_attr_fnode_max_segment_size.attr,
+ &dev_attr_fnode_local_port.attr,
+ &dev_attr_fnode_ipv4_tos.attr,
+ &dev_attr_fnode_ipv6_traffic_class.attr,
+ &dev_attr_fnode_ipv6_flow_label.attr,
+ &dev_attr_fnode_link_local_ipv6.attr,
+ &dev_attr_fnode_tcp_xmit_wsf.attr,
+ &dev_attr_fnode_tcp_recv_wsf.attr,
+ &dev_attr_fnode_statsn.attr,
+ &dev_attr_fnode_exp_statsn.attr,
+ NULL,
+};
+
+static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj,
+ struct attribute *attr,
+ int i)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
+ struct iscsi_transport *t = fnode_conn->transport;
+ int param;
+
+ if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) {
+ param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6;
+ } else if (attr == &dev_attr_fnode_header_digest.attr) {
+ param = ISCSI_FLASHNODE_HDR_DGST_EN;
+ } else if (attr == &dev_attr_fnode_data_digest.attr) {
+ param = ISCSI_FLASHNODE_DATA_DGST_EN;
+ } else if (attr == &dev_attr_fnode_snack_req.attr) {
+ param = ISCSI_FLASHNODE_SNACK_REQ_EN;
+ } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) {
+ param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT;
+ } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) {
+ param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE;
+ } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) {
+ param = ISCSI_FLASHNODE_TCP_WSF_DISABLE;
+ } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) {
+ param = ISCSI_FLASHNODE_TCP_TIMER_SCALE;
+ } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) {
+ param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN;
+ } else if (attr == &dev_attr_fnode_fragment_disable.attr) {
+ param = ISCSI_FLASHNODE_IP_FRAG_DISABLE;
+ } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) {
+ param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH;
+ } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) {
+ param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH;
+ } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) {
+ param = ISCSI_FLASHNODE_KEEPALIVE_TMO;
+ } else if (attr == &dev_attr_fnode_port.attr) {
+ param = ISCSI_FLASHNODE_PORT;
+ } else if (attr == &dev_attr_fnode_ipaddress.attr) {
+ param = ISCSI_FLASHNODE_IPADDR;
+ } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) {
+ param = ISCSI_FLASHNODE_REDIRECT_IPADDR;
+ } else if (attr == &dev_attr_fnode_max_segment_size.attr) {
+ param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE;
+ } else if (attr == &dev_attr_fnode_local_port.attr) {
+ param = ISCSI_FLASHNODE_LOCAL_PORT;
+ } else if (attr == &dev_attr_fnode_ipv4_tos.attr) {
+ param = ISCSI_FLASHNODE_IPV4_TOS;
+ } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) {
+ param = ISCSI_FLASHNODE_IPV6_TC;
+ } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) {
+ param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL;
+ } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) {
+ param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6;
+ } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) {
+ param = ISCSI_FLASHNODE_TCP_XMIT_WSF;
+ } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) {
+ param = ISCSI_FLASHNODE_TCP_RECV_WSF;
+ } else if (attr == &dev_attr_fnode_statsn.attr) {
+ param = ISCSI_FLASHNODE_STATSN;
+ } else if (attr == &dev_attr_fnode_exp_statsn.attr) {
+ param = ISCSI_FLASHNODE_EXP_STATSN;
+ } else {
+ WARN_ONCE(1, "Invalid flashnode connection attr");
+ return 0;
+ }
+
+ return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
+}
+
+static struct attribute_group iscsi_flashnode_conn_attr_group = {
+ .attrs = iscsi_flashnode_conn_attrs,
+ .is_visible = iscsi_flashnode_conn_attr_is_visible,
+};
+
+static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = {
+ &iscsi_flashnode_conn_attr_group,
+ NULL,
+};
+
+static void iscsi_flashnode_conn_release(struct device *dev)
+{
+ struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
+
+ kfree(fnode_conn->ipaddress);
+ kfree(fnode_conn->redirect_ipaddr);
+ kfree(fnode_conn->link_local_ipv6_addr);
+ kfree(fnode_conn);
+}
+
+struct device_type iscsi_flashnode_conn_dev_type = {
+ .name = "iscsi_flashnode_conn_dev_type",
+ .groups = iscsi_flashnode_conn_attr_groups,
+ .release = iscsi_flashnode_conn_release,
+};
+
+struct bus_type iscsi_flashnode_bus;
+
+int iscsi_flashnode_bus_match(struct device *dev,
+ struct device_driver *drv)
+{
+ if (dev->bus == &iscsi_flashnode_bus)
+ return 1;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match);
+
+struct bus_type iscsi_flashnode_bus = {
+ .name = "iscsi_flashnode",
+ .match = &iscsi_flashnode_bus_match,
+};
+
+/**
+ * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs
+ * @shost: pointer to host data
+ * @index: index of flashnode to add in sysfs
+ * @transport: pointer to transport data
+ * @dd_size: total size to allocate
+ *
+ * Adds a sysfs entry for the flashnode session attributes
+ *
+ * Returns:
+ * pointer to allocated flashnode sess on sucess
+ * %NULL on failure
+ */
+struct iscsi_bus_flash_session *
+iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index,
+ struct iscsi_transport *transport,
+ int dd_size)
+{
+ struct iscsi_bus_flash_session *fnode_sess;
+ int err;
+
+ fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL);
+ if (!fnode_sess)
+ return NULL;
+
+ fnode_sess->transport = transport;
+ fnode_sess->target_id = index;
+ fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type;
+ fnode_sess->dev.bus = &iscsi_flashnode_bus;
+ fnode_sess->dev.parent = &shost->shost_gendev;
+ dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u",
+ shost->host_no, index);
+
+ err = device_register(&fnode_sess->dev);
+ if (err)
+ goto free_fnode_sess;
+
+ if (dd_size)
+ fnode_sess->dd_data = &fnode_sess[1];
+
+ return fnode_sess;
+
+free_fnode_sess:
+ kfree(fnode_sess);
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess);
+
+/**
+ * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs
+ * @shost: pointer to host data
+ * @fnode_sess: pointer to the parent flashnode session entry
+ * @transport: pointer to transport data
+ * @dd_size: total size to allocate
+ *
+ * Adds a sysfs entry for the flashnode connection attributes
+ *
+ * Returns:
+ * pointer to allocated flashnode conn on success
+ * %NULL on failure
+ */
+struct iscsi_bus_flash_conn *
+iscsi_create_flashnode_conn(struct Scsi_Host *shost,
+ struct iscsi_bus_flash_session *fnode_sess,
+ struct iscsi_transport *transport,
+ int dd_size)
+{
+ struct iscsi_bus_flash_conn *fnode_conn;
+ int err;
+
+ fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL);
+ if (!fnode_conn)
+ return NULL;
+
+ fnode_conn->transport = transport;
+ fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type;
+ fnode_conn->dev.bus = &iscsi_flashnode_bus;
+ fnode_conn->dev.parent = &fnode_sess->dev;
+ dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0",
+ shost->host_no, fnode_sess->target_id);
+
+ err = device_register(&fnode_conn->dev);
+ if (err)
+ goto free_fnode_conn;
+
+ if (dd_size)
+ fnode_conn->dd_data = &fnode_conn[1];
+
+ return fnode_conn;
+
+free_fnode_conn:
+ kfree(fnode_conn);
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn);
+
+/**
+ * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn
+ * @dev: device to verify
+ * @data: pointer to data containing value to use for verification
+ *
+ * Verifies if the passed device is flashnode conn device
+ *
+ * Returns:
+ * 1 on success
+ * 0 on failure
+ */
+int iscsi_is_flashnode_conn_dev(struct device *dev, void *data)
+{
+ return dev->bus == &iscsi_flashnode_bus;
+}
+EXPORT_SYMBOL_GPL(iscsi_is_flashnode_conn_dev);
+
+static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn)
+{
+ device_unregister(&fnode_conn->dev);
+ return 0;
+}
+
+static int flashnode_match_index(struct device *dev, void *data)
+{
+ struct iscsi_bus_flash_session *fnode_sess = NULL;
+ int ret = 0;
+
+ if (!iscsi_flashnode_bus_match(dev, NULL))
+ goto exit_match_index;
+
+ fnode_sess = iscsi_dev_to_flash_session(dev);
+ ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0;
+
+exit_match_index:
+ return ret;
+}
+
+/**
+ * iscsi_get_flashnode_by_index -finds flashnode session entry by index
+ * @shost: pointer to host data
+ * @data: pointer to data containing value to use for comparison
+ * @fn: function pointer that does actual comparison
+ *
+ * Finds the flashnode session object for the passed index
+ *
+ * Returns:
+ * pointer to found flashnode session object on success
+ * %NULL on failure
+ */
+static struct iscsi_bus_flash_session *
+iscsi_get_flashnode_by_index(struct Scsi_Host *shost, void *data,
+ int (*fn)(struct device *dev, void *data))
+{
+ struct iscsi_bus_flash_session *fnode_sess = NULL;
+ struct device *dev;
+
+ dev = device_find_child(&shost->shost_gendev, data, fn);
+ if (dev)
+ fnode_sess = iscsi_dev_to_flash_session(dev);
+
+ return fnode_sess;
+}
+
+/**
+ * iscsi_find_flashnode_sess - finds flashnode session entry
+ * @shost: pointer to host data
+ * @data: pointer to data containing value to use for comparison
+ * @fn: function pointer that does actual comparison
+ *
+ * Finds the flashnode session object comparing the data passed using logic
+ * defined in passed function pointer
+ *
+ * Returns:
+ * pointer to found flashnode session device object on success
+ * %NULL on failure
+ */
+struct device *
+iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data,
+ int (*fn)(struct device *dev, void *data))
+{
+ struct device *dev;
+
+ dev = device_find_child(&shost->shost_gendev, data, fn);
+ return dev;
+}
+EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess);
+
+/**
+ * iscsi_find_flashnode_conn - finds flashnode connection entry
+ * @fnode_sess: pointer to parent flashnode session entry
+ * @data: pointer to data containing value to use for comparison
+ * @fn: function pointer that does actual comparison
+ *
+ * Finds the flashnode connection object comparing the data passed using logic
+ * defined in passed function pointer
+ *
+ * Returns:
+ * pointer to found flashnode connection device object on success
+ * %NULL on failure
+ */
+struct device *
+iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess,
+ void *data,
+ int (*fn)(struct device *dev, void *data))
+{
+ struct device *dev;
+
+ dev = device_find_child(&fnode_sess->dev, data, fn);
+ return dev;
+}
+EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn);
+
+static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data)
+{
+ if (!iscsi_is_flashnode_conn_dev(dev, NULL))
+ return 0;
+
+ return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev));
+}
+
+/**
+ * iscsi_destroy_flashnode_sess - destory flashnode session entry
+ * @fnode_sess: pointer to flashnode session entry to be destroyed
+ *
+ * Deletes the flashnode session entry and all children flashnode connection
+ * entries from sysfs
+ */
+void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess)
+{
+ int err;
+
+ err = device_for_each_child(&fnode_sess->dev, NULL,
+ iscsi_iter_destroy_flashnode_conn_fn);
+ if (err)
+ pr_err("Could not delete all connections for %s. Error %d.\n",
+ fnode_sess->dev.kobj.name, err);
+
+ device_unregister(&fnode_sess->dev);
+}
+EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess);
+
+static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data)
+{
+ if (!iscsi_flashnode_bus_match(dev, NULL))
+ return 0;
+
+ iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev));
+ return 0;
+}
+
+/**
+ * iscsi_destroy_all_flashnode - destory all flashnode session entries
+ * @shost: pointer to host data
+ *
+ * Destroys all the flashnode session entries and all corresponding children
+ * flashnode connection entries from sysfs
+ */
+void iscsi_destroy_all_flashnode(struct Scsi_Host *shost)
+{
+ device_for_each_child(&shost->shost_gendev, NULL,
+ iscsi_iter_destroy_flashnode_fn);
+}
+EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode);
+
+/*
* BSG support
*/
/**
@@ -2092,6 +2776,294 @@
return err;
}
+static const struct {
+ enum iscsi_discovery_parent_type value;
+ char *name;
+} iscsi_discovery_parent_names[] = {
+ {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
+ {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
+ {ISCSI_DISC_PARENT_ISNS, "isns" },
+};
+
+char *iscsi_get_discovery_parent_name(int parent_type)
+{
+ int i;
+ char *state = "Unknown!";
+
+ for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
+ if (iscsi_discovery_parent_names[i].value & parent_type) {
+ state = iscsi_discovery_parent_names[i].name;
+ break;
+ }
+ }
+ return state;
+}
+EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
+
+static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
+ struct iscsi_uevent *ev, uint32_t len)
+{
+ char *data = (char *)ev + sizeof(*ev);
+ struct Scsi_Host *shost;
+ struct iscsi_bus_flash_session *fnode_sess;
+ struct iscsi_bus_flash_conn *fnode_conn;
+ struct device *dev;
+ uint32_t *idx;
+ int err = 0;
+
+ if (!transport->set_flashnode_param) {
+ err = -ENOSYS;
+ goto exit_set_fnode;
+ }
+
+ shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
+ if (!shost) {
+ pr_err("%s could not find host no %u\n",
+ __func__, ev->u.set_flashnode.host_no);
+ err = -ENODEV;
+ goto put_host;
+ }
+
+ idx = &ev->u.set_flashnode.flashnode_idx;
+ fnode_sess = iscsi_get_flashnode_by_index(shost, idx,
+ flashnode_match_index);
+ if (!fnode_sess) {
+ pr_err("%s could not find flashnode %u for host no %u\n",
+ __func__, *idx, ev->u.set_flashnode.host_no);
+ err = -ENODEV;
+ goto put_host;
+ }
+
+ dev = iscsi_find_flashnode_conn(fnode_sess, NULL,
+ iscsi_is_flashnode_conn_dev);
+ if (!dev) {
+ err = -ENODEV;
+ goto put_host;
+ }
+
+ fnode_conn = iscsi_dev_to_flash_conn(dev);
+ err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
+
+put_host:
+ scsi_host_put(shost);
+
+exit_set_fnode:
+ return err;
+}
+
+static int iscsi_new_flashnode(struct iscsi_transport *transport,
+ struct iscsi_uevent *ev, uint32_t len)
+{
+ char *data = (char *)ev + sizeof(*ev);
+ struct Scsi_Host *shost;
+ int index;
+ int err = 0;
+
+ if (!transport->new_flashnode) {
+ err = -ENOSYS;
+ goto exit_new_fnode;
+ }
+
+ shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
+ if (!shost) {
+ pr_err("%s could not find host no %u\n",
+ __func__, ev->u.new_flashnode.host_no);
+ err = -ENODEV;
+ goto put_host;
+ }
+
+ index = transport->new_flashnode(shost, data, len);
+
+ if (index >= 0)
+ ev->r.new_flashnode_ret.flashnode_idx = index;
+ else
+ err = -EIO;
+
+put_host:
+ scsi_host_put(shost);
+
+exit_new_fnode:
+ return err;
+}
+
+static int iscsi_del_flashnode(struct iscsi_transport *transport,
+ struct iscsi_uevent *ev)
+{
+ struct Scsi_Host *shost;
+ struct iscsi_bus_flash_session *fnode_sess;
+ uint32_t *idx;
+ int err = 0;
+
+ if (!transport->del_flashnode) {
+ err = -ENOSYS;
+ goto exit_del_fnode;
+ }
+
+ shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
+ if (!shost) {
+ pr_err("%s could not find host no %u\n",
+ __func__, ev->u.del_flashnode.host_no);
+ err = -ENODEV;
+ goto put_host;
+ }
+
+ idx = &ev->u.del_flashnode.flashnode_idx;
+ fnode_sess = iscsi_get_flashnode_by_index(shost, idx,
+ flashnode_match_index);
+ if (!fnode_sess) {
+ pr_err("%s could not find flashnode %u for host no %u\n",
+ __func__, *idx, ev->u.del_flashnode.host_no);
+ err = -ENODEV;
+ goto put_host;
+ }
+
+ err = transport->del_flashnode(fnode_sess);
+
+put_host:
+ scsi_host_put(shost);
+
+exit_del_fnode:
+ return err;
+}
+
+static int iscsi_login_flashnode(struct iscsi_transport *transport,
+ struct iscsi_uevent *ev)
+{
+ struct Scsi_Host *shost;
+ struct iscsi_bus_flash_session *fnode_sess;
+ struct iscsi_bus_flash_conn *fnode_conn;
+ struct device *dev;
+ uint32_t *idx;
+ int err = 0;
+
+ if (!transport->login_flashnode) {
+ err = -ENOSYS;
+ goto exit_login_fnode;
+ }
+
+ shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
+ if (!shost) {
+ pr_err("%s could not find host no %u\n",
+ __func__, ev->u.login_flashnode.host_no);
+ err = -ENODEV;
+ goto put_host;
+ }
+
+ idx = &ev->u.login_flashnode.flashnode_idx;
+ fnode_sess = iscsi_get_flashnode_by_index(shost, idx,
+ flashnode_match_index);
+ if (!fnode_sess) {
+ pr_err("%s could not find flashnode %u for host no %u\n",
+ __func__, *idx, ev->u.login_flashnode.host_no);
+ err = -ENODEV;
+ goto put_host;
+ }
+
+ dev = iscsi_find_flashnode_conn(fnode_sess, NULL,
+ iscsi_is_flashnode_conn_dev);
+ if (!dev) {
+ err = -ENODEV;
+ goto put_host;
+ }
+
+ fnode_conn = iscsi_dev_to_flash_conn(dev);
+ err = transport->login_flashnode(fnode_sess, fnode_conn);
+
+put_host:
+ scsi_host_put(shost);
+
+exit_login_fnode:
+ return err;
+}
+
+static int iscsi_logout_flashnode(struct iscsi_transport *transport,
+ struct iscsi_uevent *ev)
+{
+ struct Scsi_Host *shost;
+ struct iscsi_bus_flash_session *fnode_sess;
+ struct iscsi_bus_flash_conn *fnode_conn;
+ struct device *dev;
+ uint32_t *idx;
+ int err = 0;
+
+ if (!transport->logout_flashnode) {
+ err = -ENOSYS;
+ goto exit_logout_fnode;
+ }
+
+ shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
+ if (!shost) {
+ pr_err("%s could not find host no %u\n",
+ __func__, ev->u.logout_flashnode.host_no);
+ err = -ENODEV;
+ goto put_host;
+ }
+
+ idx = &ev->u.logout_flashnode.flashnode_idx;
+ fnode_sess = iscsi_get_flashnode_by_index(shost, idx,
+ flashnode_match_index);
+ if (!fnode_sess) {
+ pr_err("%s could not find flashnode %u for host no %u\n",
+ __func__, *idx, ev->u.logout_flashnode.host_no);
+ err = -ENODEV;
+ goto put_host;
+ }
+
+ dev = iscsi_find_flashnode_conn(fnode_sess, NULL,
+ iscsi_is_flashnode_conn_dev);
+ if (!dev) {
+ err = -ENODEV;
+ goto put_host;
+ }
+
+ fnode_conn = iscsi_dev_to_flash_conn(dev);
+
+ err = transport->logout_flashnode(fnode_sess, fnode_conn);
+
+put_host:
+ scsi_host_put(shost);
+
+exit_logout_fnode:
+ return err;
+}
+
+static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
+ struct iscsi_uevent *ev)
+{
+ struct Scsi_Host *shost;
+ struct iscsi_cls_session *session;
+ int err = 0;
+
+ if (!transport->logout_flashnode_sid) {
+ err = -ENOSYS;
+ goto exit_logout_sid;
+ }
+
+ shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
+ if (!shost) {
+ pr_err("%s could not find host no %u\n",
+ __func__, ev->u.logout_flashnode.host_no);
+ err = -ENODEV;
+ goto put_host;
+ }
+
+ session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
+ if (!session) {
+ pr_err("%s could not find session id %u\n",
+ __func__, ev->u.logout_flashnode_sid.sid);
+ err = -EINVAL;
+ goto put_host;
+ }
+
+ err = transport->logout_flashnode_sid(session);
+
+put_host:
+ scsi_host_put(shost);
+
+exit_logout_sid:
+ return err;
+}
+
static int
iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
{
@@ -2246,6 +3218,27 @@
case ISCSI_UEVENT_DELETE_CHAP:
err = iscsi_delete_chap(transport, ev);
break;
+ case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
+ err = iscsi_set_flashnode_param(transport, ev,
+ nlmsg_attrlen(nlh,
+ sizeof(*ev)));
+ break;
+ case ISCSI_UEVENT_NEW_FLASHNODE:
+ err = iscsi_new_flashnode(transport, ev,
+ nlmsg_attrlen(nlh, sizeof(*ev)));
+ break;
+ case ISCSI_UEVENT_DEL_FLASHNODE:
+ err = iscsi_del_flashnode(transport, ev);
+ break;
+ case ISCSI_UEVENT_LOGIN_FLASHNODE:
+ err = iscsi_login_flashnode(transport, ev);
+ break;
+ case ISCSI_UEVENT_LOGOUT_FLASHNODE:
+ err = iscsi_logout_flashnode(transport, ev);
+ break;
+ case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
+ err = iscsi_logout_flashnode_sid(transport, ev);
+ break;
default:
err = -ENOSYS;
break;
@@ -2981,10 +3974,14 @@
if (err)
goto unregister_conn_class;
+ err = bus_register(&iscsi_flashnode_bus);
+ if (err)
+ goto unregister_session_class;
+
nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
if (!nls) {
err = -ENOBUFS;
- goto unregister_session_class;
+ goto unregister_flashnode_bus;
}
iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh");
@@ -2995,6 +3992,8 @@
release_nls:
netlink_kernel_release(nls);
+unregister_flashnode_bus:
+ bus_unregister(&iscsi_flashnode_bus);
unregister_session_class:
transport_class_unregister(&iscsi_session_class);
unregister_conn_class:
@@ -3014,6 +4013,7 @@
{
destroy_workqueue(iscsi_eh_timer_workq);
netlink_kernel_release(nls);
+ bus_unregister(&iscsi_flashnode_bus);
transport_class_unregister(&iscsi_connection_class);
transport_class_unregister(&iscsi_session_class);
transport_class_unregister(&iscsi_host_class);