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[SCSI] scsi_transport_iscsi: Add conn login, kernel to user, event to support offload session login.

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Offload drivers like qla4xxx will offload the sending of the login/logout
pdus still, so this patch adds iscsi_conn_login_event which is
used by these types of drivers to notify userspace that the connection
has changed state.

It also adds a iscsi_is_session_online helper so the lld
can query the sessions state field.

Signed-off-by: Manish Rangankar <manish.rangankar@qlogic.com>
Signed-off-by: Lalit Chandivade <lalit.chandivade@qlogic.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Manish Rangankar
2011-07-25 13:48:52 -05:00
committed by James Bottomley
parent a355943ca8
commit 17fa575eec
3 changed files with 67 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/scsi/iscsi_if.h
+17
View File
@@ -71,6 +71,7 @@ enum iscsi_uevent_e {
ISCSI_KEVENT_PATH_REQ = KEVENT_BASE + 7,
ISCSI_KEVENT_IF_DOWN = KEVENT_BASE + 8,
ISCSI_KEVENT_CONN_LOGIN_STATE = KEVENT_BASE + 9,
};
enum iscsi_tgt_dscvr {
@@ -198,6 +199,11 @@ struct iscsi_uevent {
uint32_t cid;
uint64_t recv_handle;
} recv_req;
struct msg_conn_login {
uint32_t sid;
uint32_t cid;
uint32_t state; /* enum iscsi_conn_state */
} conn_login;
struct msg_conn_error {
uint32_t sid;
uint32_t cid;
@@ -309,6 +315,16 @@ enum iscsi_net_param {
ISCSI_NET_PARAM_IFACE_NAME = 17,
};
enum iscsi_conn_state {
ISCSI_CONN_STATE_FREE,
ISCSI_CONN_STATE_XPT_WAIT,
ISCSI_CONN_STATE_IN_LOGIN,
ISCSI_CONN_STATE_LOGGED_IN,
ISCSI_CONN_STATE_IN_LOGOUT,
ISCSI_CONN_STATE_LOGOUT_REQUESTED,
ISCSI_CONN_STATE_CLEANUP_WAIT,
};
/*
* Common error codes
*/
@@ -421,6 +437,7 @@ enum iscsi_host_param {
#define CAP_DIGEST_OFFLOAD 0x1000 /* offload hdr and data digests */
#define CAP_PADDING_OFFLOAD 0x2000 /* offload padding insertion, removal,
and verification */
#define CAP_LOGIN_OFFLOAD 0x4000 /* offload session login */
/*
* These flags describes reason of stop_conn() call
include/scsi/scsi_transport_iscsi.h
+3
View File
@@ -156,6 +156,8 @@ extern int iscsi_unregister_transport(struct iscsi_transport *tt);
*/
extern void iscsi_conn_error_event(struct iscsi_cls_conn *conn,
enum iscsi_err error);
extern void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
enum iscsi_conn_state state);
extern int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
char *data, uint32_t data_size);
@@ -268,6 +270,7 @@ struct iscsi_iface {
dev_printk(prefix, &(_cls_conn)->dev, fmt, ##a)
extern int iscsi_session_chkready(struct iscsi_cls_session *session);
extern int iscsi_is_session_online(struct iscsi_cls_session *session);
extern struct iscsi_cls_session *iscsi_alloc_session(struct Scsi_Host *shost,
struct iscsi_transport *transport, int dd_size);
extern int iscsi_add_session(struct iscsi_cls_session *session,