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[SCSI] iscsi: remove session/conn_data_size from iscsi_transport

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This removes the session and conn data_size fields from the iscsi_transport.
Just pass in the value like with host allocation. This patch also makes
it so the LLD iscsi_conn data is allocated with the iscsi_cls_conn.

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 15:54:01 -05:00 committed by James Bottomley
parent a4804cd6eb
commit 5d91e209fb
7 changed files with 40 additions and 58 deletions
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16
drivers/infiniband/ulp/iser/iscsi_iser.c
View File

@ -279,7 +279,7 @@ iscsi_iser_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
struct iscsi_cls_conn *cls_conn;
struct iscsi_iser_conn *iser_conn;
cls_conn = iscsi_conn_setup(cls_session, conn_idx);
cls_conn = iscsi_conn_setup(cls_session, sizeof(*iser_conn), conn_idx);
if (!cls_conn)
return NULL;
conn = cls_conn->dd_data;
@ -290,10 +290,7 @@ iscsi_iser_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
*/
conn->max_recv_dlength = 128;
iser_conn = kzalloc(sizeof(*iser_conn), GFP_KERNEL);
if (!iser_conn)
goto conn_alloc_fail;
iser_conn = conn->dd_data;
/* currently this is the only field which need to be initiated */
rwlock_init(&iser_conn->lock);
@ -301,10 +298,6 @@ iscsi_iser_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
iser_conn->iscsi_conn = conn;
return cls_conn;
conn_alloc_fail:
iscsi_conn_teardown(cls_conn);
return NULL;
}
static void
@ -313,10 +306,9 @@ iscsi_iser_conn_destroy(struct iscsi_cls_conn *cls_conn)
struct iscsi_conn *conn = cls_conn->dd_data;
struct iscsi_iser_conn *iser_conn = conn->dd_data;
iscsi_conn_teardown(cls_conn);
if (iser_conn->ib_conn)
iser_conn->ib_conn->iser_conn = NULL;
kfree(iser_conn);
iscsi_conn_teardown(cls_conn);
}
static int
@ -619,8 +611,6 @@ static struct iscsi_transport iscsi_iser_transport = {
.host_param_mask = ISCSI_HOST_HWADDRESS |
ISCSI_HOST_NETDEV_NAME |
ISCSI_HOST_INITIATOR_NAME,
.conndata_size = sizeof(struct iscsi_conn),
.sessiondata_size = sizeof(struct iscsi_session),
/* session management */
.create_session = iscsi_iser_session_create,
.destroy_session = iscsi_iser_session_destroy,

19
drivers/scsi/iscsi_tcp.c
View File

@ -1490,7 +1490,7 @@ iscsi_tcp_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
struct iscsi_cls_conn *cls_conn;
struct iscsi_tcp_conn *tcp_conn;
cls_conn = iscsi_conn_setup(cls_session, conn_idx);
cls_conn = iscsi_conn_setup(cls_session, sizeof(*tcp_conn), conn_idx);
if (!cls_conn)
return NULL;
conn = cls_conn->dd_data;
@ -1500,18 +1500,14 @@ iscsi_tcp_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
*/
conn->max_recv_dlength = ISCSI_DEF_MAX_RECV_SEG_LEN;
tcp_conn = kzalloc(sizeof(*tcp_conn), GFP_KERNEL);
if (!tcp_conn)
goto tcp_conn_alloc_fail;
conn->dd_data = tcp_conn;
tcp_conn = conn->dd_data;
tcp_conn->iscsi_conn = conn;
tcp_conn->tx_hash.tfm = crypto_alloc_hash("crc32c", 0,
CRYPTO_ALG_ASYNC);
tcp_conn->tx_hash.flags = 0;
if (IS_ERR(tcp_conn->tx_hash.tfm))
goto free_tcp_conn;
goto free_conn;
tcp_conn->rx_hash.tfm = crypto_alloc_hash("crc32c", 0,
CRYPTO_ALG_ASYNC);
@ -1523,14 +1519,12 @@ iscsi_tcp_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
free_tx_tfm:
crypto_free_hash(tcp_conn->tx_hash.tfm);
free_tcp_conn:
free_conn:
iscsi_conn_printk(KERN_ERR, conn,
"Could not create connection due to crc32c "
"loading error. Make sure the crc32c "
"module is built as a module or into the "
"kernel\n");
kfree(tcp_conn);
tcp_conn_alloc_fail:
iscsi_conn_teardown(cls_conn);
return NULL;
}
@ -1563,14 +1557,13 @@ iscsi_tcp_conn_destroy(struct iscsi_cls_conn *cls_conn)
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
iscsi_tcp_release_conn(conn);
iscsi_conn_teardown(cls_conn);
if (tcp_conn->tx_hash.tfm)
crypto_free_hash(tcp_conn->tx_hash.tfm);
if (tcp_conn->rx_hash.tfm)
crypto_free_hash(tcp_conn->rx_hash.tfm);
kfree(tcp_conn);
iscsi_conn_teardown(cls_conn);
}
static void
@ -1983,8 +1976,6 @@ static struct iscsi_transport iscsi_tcp_transport = {
.host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS |
ISCSI_HOST_INITIATOR_NAME |
ISCSI_HOST_NETDEV_NAME,
.conndata_size = sizeof(struct iscsi_conn),
.sessiondata_size = sizeof(struct iscsi_session),
/* session management */
.create_session = iscsi_tcp_session_create,
.destroy_session = iscsi_tcp_session_destroy,

15
drivers/scsi/libiscsi.c
View File

@ -1867,7 +1867,8 @@ iscsi_session_setup(struct iscsi_transport *iscsit, struct Scsi_Host *shost,
cmds_max = ISCSI_DEF_XMIT_CMDS_MAX;
}
cls_session = iscsi_alloc_session(shost, iscsit);
cls_session = iscsi_alloc_session(shost, iscsit,
sizeof(struct iscsi_session));
if (!cls_session)
return NULL;
session = cls_session->dd_data;
@ -1968,22 +1969,26 @@ EXPORT_SYMBOL_GPL(iscsi_session_teardown);
/**
* iscsi_conn_setup - create iscsi_cls_conn and iscsi_conn
* @cls_session: iscsi_cls_session
* @dd_size: private driver data size
* @conn_idx: cid
**/
*/
struct iscsi_cls_conn *
iscsi_conn_setup(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
iscsi_conn_setup(struct iscsi_cls_session *cls_session, int dd_size,
uint32_t conn_idx)
{
struct iscsi_session *session = cls_session->dd_data;
struct iscsi_conn *conn;
struct iscsi_cls_conn *cls_conn;
char *data;
cls_conn = iscsi_create_conn(cls_session, conn_idx);
cls_conn = iscsi_create_conn(cls_session, sizeof(*conn) + dd_size,
conn_idx);
if (!cls_conn)
return NULL;
conn = cls_conn->dd_data;
memset(conn, 0, sizeof(*conn));
memset(conn, 0, sizeof(*conn) + dd_size);
conn->dd_data = cls_conn->dd_data + sizeof(*conn);
conn->session = session;
conn->cls_conn = cls_conn;
conn->c_stage = ISCSI_CONN_INITIAL_STAGE;

7
drivers/scsi/qla4xxx/ql4_os.c
View File

@ -113,8 +113,6 @@ static struct iscsi_transport qla4xxx_iscsi_transport = {
.host_param_mask = ISCSI_HOST_HWADDRESS |
ISCSI_HOST_IPADDRESS |
ISCSI_HOST_INITIATOR_NAME,
.sessiondata_size = sizeof(struct ddb_entry),
.tgt_dscvr = qla4xxx_tgt_dscvr,
.get_conn_param = qla4xxx_conn_get_param,
.get_session_param = qla4xxx_sess_get_param,
@ -274,7 +272,7 @@ int qla4xxx_add_sess(struct ddb_entry *ddb_entry)
return err;
}
ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0);
ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0, 0);
if (!ddb_entry->conn) {
iscsi_remove_session(ddb_entry->sess);
DEBUG2(printk(KERN_ERR "Could not add connection.\n"));
@ -291,7 +289,8 @@ struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha)
struct ddb_entry *ddb_entry;
struct iscsi_cls_session *sess;
sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport);
sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport,
sizeof(struct ddb_entry));
if (!sess)
return NULL;

24
drivers/scsi/scsi_transport_iscsi.c
View File

@ -483,12 +483,12 @@ static int iscsi_unbind_session(struct iscsi_cls_session *session)
}
struct iscsi_cls_session *
iscsi_alloc_session(struct Scsi_Host *shost,
struct iscsi_transport *transport)
iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
int dd_size)
{
struct iscsi_cls_session *session;
session = kzalloc(sizeof(*session) + transport->sessiondata_size,
session = kzalloc(sizeof(*session) + dd_size,
GFP_KERNEL);
if (!session)
return NULL;
@ -510,7 +510,7 @@ iscsi_alloc_session(struct Scsi_Host *shost,
session->dev.parent = &shost->shost_gendev;
session->dev.release = iscsi_session_release;
device_initialize(&session->dev);
if (transport->sessiondata_size)
if (dd_size)
session->dd_data = &session[1];
return session;
}
@ -558,18 +558,18 @@ EXPORT_SYMBOL_GPL(iscsi_add_session);
* iscsi_create_session - create iscsi class session
* @shost: scsi host
* @transport: iscsi transport
* @dd_size: private driver data size
* @target_id: which target
*
* This can be called from a LLD or iscsi_transport.
*/
struct iscsi_cls_session *
iscsi_create_session(struct Scsi_Host *shost,
struct iscsi_transport *transport,
unsigned int target_id)
iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
int dd_size, unsigned int target_id)
{
struct iscsi_cls_session *session;
session = iscsi_alloc_session(shost, transport);
session = iscsi_alloc_session(shost, transport, dd_size);
if (!session)
return NULL;
@ -671,6 +671,7 @@ EXPORT_SYMBOL_GPL(iscsi_destroy_session);
/**
* iscsi_create_conn - create iscsi class connection
* @session: iscsi cls session
* @dd_size: private driver data size
* @cid: connection id
*
* This can be called from a LLD or iscsi_transport. The connection
@ -683,18 +684,17 @@ EXPORT_SYMBOL_GPL(iscsi_destroy_session);
* non-zero.
*/
struct iscsi_cls_conn *
iscsi_create_conn(struct iscsi_cls_session *session, uint32_t cid)
iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
{
struct iscsi_transport *transport = session->transport;
struct iscsi_cls_conn *conn;
unsigned long flags;
int err;
conn = kzalloc(sizeof(*conn) + transport->conndata_size, GFP_KERNEL);
conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
if (!conn)
return NULL;
if (transport->conndata_size)
if (dd_size)
conn->dd_data = &conn[1];
INIT_LIST_HEAD(&conn->conn_list);

8
include/scsi/libiscsi.h
View File

@ -313,8 +313,6 @@ struct iscsi_host {
char local_address[ISCSI_ADDRESS_BUF_LEN];
};
#define iscsi_host_priv(_shost) \
(shost_priv(_shost) + sizeof(struct iscsi_host))
/*
* scsi host template
*/
@ -325,10 +323,12 @@ extern int iscsi_eh_device_reset(struct scsi_cmnd *sc);
extern int iscsi_queuecommand(struct scsi_cmnd *sc,
void (*done)(struct scsi_cmnd *));
/*
* iSCSI host helpers.
*/
#define iscsi_host_priv(_shost) \
(shost_priv(_shost) + sizeof(struct iscsi_host))
extern int iscsi_host_set_param(struct Scsi_Host *shost,
enum iscsi_host_param param, char *buf,
int buflen);
@ -360,7 +360,7 @@ extern int iscsi_session_get_param(struct iscsi_cls_session *cls_session,
* connection management
*/
extern struct iscsi_cls_conn *iscsi_conn_setup(struct iscsi_cls_session *,
uint32_t);
int, uint32_t);
extern void iscsi_conn_teardown(struct iscsi_cls_conn *);
extern int iscsi_conn_start(struct iscsi_cls_conn *);
extern void iscsi_conn_stop(struct iscsi_cls_conn *, int);

9
include/scsi/scsi_transport_iscsi.h
View File

@ -83,10 +83,6 @@ struct iscsi_transport {
/* LLD sets this to indicate what values it can export to sysfs */
uint64_t param_mask;
uint64_t host_param_mask;
/* LLD connection data size */
int conndata_size;
/* LLD session data size */
int sessiondata_size;
struct iscsi_cls_session *(*create_session) (struct Scsi_Host *shost,
uint16_t cmds_max, uint16_t qdepth,
uint32_t sn, uint32_t *hn);
@ -222,19 +218,20 @@ extern void iscsi_host_for_each_session(struct Scsi_Host *shost,
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);
struct iscsi_transport *transport, int dd_size);
extern int iscsi_add_session(struct iscsi_cls_session *session,
unsigned int target_id);
extern int iscsi_session_event(struct iscsi_cls_session *session,
enum iscsi_uevent_e event);
extern struct iscsi_cls_session *iscsi_create_session(struct Scsi_Host *shost,
struct iscsi_transport *t,
int dd_size,
unsigned int target_id);
extern void iscsi_remove_session(struct iscsi_cls_session *session);
extern void iscsi_free_session(struct iscsi_cls_session *session);
extern int iscsi_destroy_session(struct iscsi_cls_session *session);
extern struct iscsi_cls_conn *iscsi_create_conn(struct iscsi_cls_session *sess,
uint32_t cid);
int dd_size, uint32_t cid);
extern int iscsi_destroy_conn(struct iscsi_cls_conn *conn);
extern void iscsi_unblock_session(struct iscsi_cls_session *session);
extern void iscsi_block_session(struct iscsi_cls_session *session);