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[SCSI] iscsi: fixup set/get param functions

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Reduce duplication in the software iscsi_transport modules by
adding a libiscsi function to handle the common grunt work.

This also has the drivers return specifc -EXXX values for different
errors so userspace can finally handle them in a sane way.

Also just pass the sysfs buffers to the drivers so HW iscsi can
get/set its string values, like targetname, and initiatorname.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Mike Christie
2006-06-28 12:00:23 -05:00
committed by James Bottomley
parent 01cb225dad
commit a54a52caad
4 changed files with 246 additions and 187 deletions
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15
include/scsi/libiscsi.h
View File

@@ -157,6 +157,11 @@ struct iscsi_conn {
int max_xmit_dlength; /* target_max_recv_dsl */
int hdrdgst_en;
int datadgst_en;
int ifmarker_en;
int ofmarker_en;
/* values userspace uses to id a conn */
int persistent_port;
char *persistent_address;
/* MIB-statistics */
uint64_t txdata_octets;
@@ -196,8 +201,8 @@ struct iscsi_session {
int pdu_inorder_en;
int dataseq_inorder_en;
int erl;
int ifmarker_en;
int ofmarker_en;
int tpgt;
char *targetname;
/* control data */
struct iscsi_transport *tt;
@@ -240,6 +245,10 @@ iscsi_session_setup(struct iscsi_transport *, struct scsi_transport_template *,
extern void iscsi_session_teardown(struct iscsi_cls_session *);
extern struct iscsi_session *class_to_transport_session(struct iscsi_cls_session *);
extern void iscsi_session_recovery_timedout(struct iscsi_cls_session *);
extern int iscsi_set_param(struct iscsi_cls_conn *cls_conn,
enum iscsi_param param, char *buf, int buflen);
extern int iscsi_session_get_param(struct iscsi_cls_session *cls_session,
enum iscsi_param param, char *buf);
#define session_to_cls(_sess) \
hostdata_session(_sess->host->hostdata)
@@ -255,6 +264,8 @@ extern void iscsi_conn_stop(struct iscsi_cls_conn *, int);
extern int iscsi_conn_bind(struct iscsi_cls_session *, struct iscsi_cls_conn *,
int);
extern void iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err);
extern int iscsi_conn_get_param(struct iscsi_cls_conn *cls_conn,
enum iscsi_param param, char *buf);
/*
* pdu and task processing

29
include/scsi/scsi_transport_iscsi.h
View File

@@ -34,6 +34,7 @@ struct iscsi_cls_conn;
struct iscsi_conn;
struct iscsi_cmd_task;
struct iscsi_mgmt_task;
struct sockaddr;
/**
* struct iscsi_transport - iSCSI Transport template
@@ -46,7 +47,12 @@ struct iscsi_mgmt_task;
* @bind_conn: associate this connection with existing iSCSI session
* and specified transport descriptor
* @destroy_conn: destroy inactive iSCSI connection
* @set_param: set iSCSI Data-Path operational parameter
* @set_param: set iSCSI parameter. Return 0 on success, -ENODATA
* when param is not supported, and a -Exx value on other
* error.
* @get_param get iSCSI parameter. Must return number of bytes
* copied to buffer on success, -ENODATA when param
* is not supported, and a -Exx value on other error
* @start_conn: set connection to be operational
* @stop_conn: suspend/recover/terminate connection
* @send_pdu: send iSCSI PDU, Login, Logout, NOP-Out, Reject, Text.
@@ -97,15 +103,11 @@ struct iscsi_transport {
void (*stop_conn) (struct iscsi_cls_conn *conn, int flag);
void (*destroy_conn) (struct iscsi_cls_conn *conn);
int (*set_param) (struct iscsi_cls_conn *conn, enum iscsi_param param,
uint32_t value);
char *buf, int buflen);
int (*get_conn_param) (struct iscsi_cls_conn *conn,
enum iscsi_param param, uint32_t *value);
enum iscsi_param param, char *buf);
int (*get_session_param) (struct iscsi_cls_session *session,
enum iscsi_param param, uint32_t *value);
int (*get_conn_str_param) (struct iscsi_cls_conn *conn,
enum iscsi_param param, char *buf);
int (*get_session_str_param) (struct iscsi_cls_session *session,
enum iscsi_param param, char *buf);
enum iscsi_param param, char *buf);
int (*send_pdu) (struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
char *data, uint32_t data_size);
void (*get_stats) (struct iscsi_cls_conn *conn,
@@ -157,13 +159,6 @@ struct iscsi_cls_conn {
struct iscsi_transport *transport;
uint32_t cid; /* connection id */
/* portal/group values we got during discovery */
char *persistent_address;
int persistent_port;
/* portal/group values we are currently using */
char *address;
int port;
int active; /* must be accessed with the connlock */
struct device dev; /* sysfs transport/container device */
struct mempool_zone *z_error;
@@ -187,10 +182,6 @@ struct iscsi_cls_session {
struct list_head host_list;
struct iscsi_transport *transport;
/* iSCSI values used as unique id by userspace. */
char *targetname;
int tpgt;
/* recovery fields */
int recovery_tmo;
struct work_struct recovery_work;