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[SCSI] iscsi class, libiscsi: add iscsi sysfs session state file

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This adds a iscsi session state file which exports the session
state for both software and hardware iscsi. It also hooks libiscsi
in.

Signed-off-by: Mike Christie <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
This commit is contained in:
Mike Christie 2008-01-31 13:36:43 -06:00 • committed by James Bottomley
commit 6eabafbe66
4 changed files with 161 additions and 33 deletions
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19
include/scsi/libiscsi.h
View file

@ -135,6 +135,14 @@ static inline void* iscsi_next_hdr(struct iscsi_cmd_task *ctask)
return (void*)ctask->hdr + ctask->hdr_len;
}
/* Connection's states */
enum {
ISCSI_CONN_INITIAL_STAGE,
ISCSI_CONN_STARTED,
ISCSI_CONN_STOPPED,
ISCSI_CONN_CLEANUP_WAIT,
};
struct iscsi_conn {
struct iscsi_cls_conn *cls_conn; /* ptr to class connection */
void *dd_data; /* iscsi_transport data */
@ -227,6 +235,17 @@ struct iscsi_pool {
int max; /* Max number of elements */
};
/* Session's states */
enum {
ISCSI_STATE_FREE = 1,
ISCSI_STATE_LOGGED_IN,
ISCSI_STATE_FAILED,
ISCSI_STATE_TERMINATE,
ISCSI_STATE_IN_RECOVERY,
ISCSI_STATE_RECOVERY_FAILED,
ISCSI_STATE_LOGGING_OUT,
};
struct iscsi_session {
/*
* Syncs up the scsi eh thread with the iscsi eh thread when sending

27
include/scsi/scsi_transport_iscsi.h
View file

@ -149,13 +149,6 @@ extern void iscsi_conn_error(struct iscsi_cls_conn *conn, enum iscsi_err error);
extern int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
char *data, uint32_t data_size);
/* Connection's states */
#define ISCSI_CONN_INITIAL_STAGE 0
#define ISCSI_CONN_STARTED 1
#define ISCSI_CONN_STOPPED 2
#define ISCSI_CONN_CLEANUP_WAIT 3
struct iscsi_cls_conn {
struct list_head conn_list; /* item in connlist */
void *dd_data; /* LLD private data */
@ -169,19 +162,21 @@ struct iscsi_cls_conn {
#define iscsi_dev_to_conn(_dev) \
container_of(_dev, struct iscsi_cls_conn, dev)
/* Session's states */
#define ISCSI_STATE_FREE 1
#define ISCSI_STATE_LOGGED_IN 2
#define ISCSI_STATE_FAILED 3
#define ISCSI_STATE_TERMINATE 4
#define ISCSI_STATE_IN_RECOVERY 5
#define ISCSI_STATE_RECOVERY_FAILED 6
#define ISCSI_STATE_LOGGING_OUT 7
#define iscsi_conn_to_session(_conn) \
iscsi_dev_to_session(_conn->dev.parent)
/* iscsi class session state */
enum {
ISCSI_SESSION_LOGGED_IN,
ISCSI_SESSION_FAILED,
ISCSI_SESSION_FREE,
};
struct iscsi_cls_session {
struct list_head sess_list; /* item in session_list */
struct list_head host_list;
struct iscsi_transport *transport;
spinlock_t lock;
/* recovery fields */
int recovery_tmo;
@ -190,6 +185,7 @@ struct iscsi_cls_session {
int target_id;
int state;
int sid; /* session id */
void *dd_data; /* LLD private data */
struct device dev; /* sysfs transport/container device */
@ -214,6 +210,7 @@ struct iscsi_host {
/*
* session and connection functions that can be used by HW iSCSI LLDs
*/
extern int iscsi_session_chkready(struct iscsi_cls_session *session);
extern struct iscsi_cls_session *iscsi_alloc_session(struct Scsi_Host *shost,
struct iscsi_transport *transport);
extern int iscsi_add_session(struct iscsi_cls_session *session,