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[SCSI] libiscsi: merge iscsi_mgmt_task and iscsi_cmd_task

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There is no need to have the mgmt and cmd tasks separate
structs. It used to save a lot of memory when we overprealocated
memory for tasks, but the next patches will set up the
driver so in the future they can use a mempool or some other
common scsi command allocator and common tagging.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Mike Christie
2008-05-21 15:54:06 -05:00
committed by James Bottomley
parent 052d014485
commit 3e5c28ad03
3 changed files with 272 additions and 316 deletions
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29
include/scsi/libiscsi.h
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@@ -85,18 +85,6 @@ enum {
ISCSI_DIGEST_SIZE = sizeof(__u32),
};
struct iscsi_mgmt_task {
/*
* Becuae LLDs allocate their hdr differently, this is a pointer to
* that storage. It must be setup at session creation time.
*/
struct iscsi_hdr *hdr;
char *data; /* mgmt payload */
unsigned data_count; /* counts data to be sent */
uint32_t itt; /* this ITT */
void *dd_data; /* driver/transport data */
struct list_head running;
};
enum {
ISCSI_TASK_COMPLETED,
@@ -121,6 +109,7 @@ struct iscsi_cmd_task {
/* offset in unsolicited stream (bytes); */
unsigned unsol_offset;
unsigned data_count; /* remaining Data-Out */
char *data; /* mgmt payload */
struct scsi_cmnd *sc; /* associated SCSI cmd*/
struct iscsi_conn *conn; /* used connection */
@@ -162,7 +151,7 @@ struct iscsi_conn {
unsigned long last_ping;
int ping_timeout;
int recv_timeout;
struct iscsi_mgmt_task *ping_mtask;
struct iscsi_cmd_task *ping_ctask;
/* iSCSI connection-wide sequencing */
uint32_t exp_statsn;
@@ -178,9 +167,8 @@ struct iscsi_conn {
* should always fit in this buffer
*/
char *data;
struct iscsi_mgmt_task *login_mtask; /* mtask used for login/text */
struct iscsi_mgmt_task *mtask; /* xmit mtask in progress */
struct iscsi_cmd_task *ctask; /* xmit ctask in progress */
struct iscsi_cmd_task *login_ctask; /* mtask used for login/text */
struct iscsi_cmd_task *ctask; /* xmit task in progress */
/* xmit */
struct list_head mgmtqueue; /* mgmt (control) xmit queue */
@@ -295,12 +283,10 @@ struct iscsi_session {
int state; /* session state */
int age; /* counts session re-opens */
int scsi_cmds_max; /* max scsi commands */
int cmds_max; /* size of cmds array */
struct iscsi_cmd_task **cmds; /* Original Cmds arr */
struct iscsi_pool cmdpool; /* PDU's pool */
int mgmtpool_max; /* size of mgmt array */
struct iscsi_mgmt_task **mgmt_cmds; /* Original mgmt arr */
struct iscsi_pool mgmtpool; /* Mgmt PDU's pool */
};
struct iscsi_host {
@@ -345,7 +331,7 @@ extern void iscsi_host_free(struct Scsi_Host *shost);
*/
extern struct iscsi_cls_session *
iscsi_session_setup(struct iscsi_transport *, struct Scsi_Host *shost,
uint16_t, int, int, uint32_t);
uint16_t, int, uint32_t);
extern void iscsi_session_teardown(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,
@@ -388,8 +374,7 @@ extern int iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *,
extern int iscsi_verify_itt(struct iscsi_conn *, itt_t);
extern struct iscsi_cmd_task *iscsi_itt_to_ctask(struct iscsi_conn *, itt_t);
extern void iscsi_requeue_ctask(struct iscsi_cmd_task *ctask);
extern void iscsi_free_mgmt_task(struct iscsi_conn *conn,
struct iscsi_mgmt_task *mtask);
extern void iscsi_put_ctask(struct iscsi_cmd_task *ctask);
/*
* generic helpers