linux/drivers/scsi/qla2xxx/tcm_qla2xxx.h
Anatoliy Glagolev 17b18eaa6f scsi: qla2xxx: deadlock by configfs_depend_item
The intent of invoking configfs_depend_item in commit 7474f52a82
("tcm_qla2xxx: Perform configfs depend/undepend for base_tpg")
was to prevent a physical Fibre Channel port removal when
virtual (NPIV) ports announced through that physical port are active.
The change does not work as expected: it makes enabled physical port
dependent on target configfs subsystem (the port's parent), something
the configfs guarantees anyway.

Besides, scheduling work in a worker thread and waiting for the work's
completion is not really a valid workaround for the requirement not to call
configfs_depend_item from a configfs callback: the call occasionally
deadlocks.

Thus, removing configfs_depend_item calls does not break anything and fixes
the deadlock problem.

Signed-off-by: Anatoliy Glagolev <glagolig@gmail.com>
Acked-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2018-12-19 21:26:38 -05:00

81 lines
2.4 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
#include <target/target_core_base.h>
#include <linux/btree.h>
/* length of ASCII WWPNs including pad */
#define TCM_QLA2XXX_NAMELEN 32
/*
* Number of pre-allocated per-session tags, based upon the worst-case
* per port number of iocbs
*/
#define TCM_QLA2XXX_DEFAULT_TAGS 2088
#include "qla_target.h"
struct tcm_qla2xxx_nacl {
struct se_node_acl se_node_acl;
/* From libfc struct fc_rport->port_id */
u32 nport_id;
/* Binary World Wide unique Node Name for remote FC Initiator Nport */
u64 nport_wwnn;
/* ASCII formatted WWPN for FC Initiator Nport */
char nport_name[TCM_QLA2XXX_NAMELEN];
/* Pointer to fc_port */
struct fc_port *fc_port;
/* Pointer to TCM FC nexus */
struct se_session *nport_nexus;
};
struct tcm_qla2xxx_tpg_attrib {
int generate_node_acls;
int cache_dynamic_acls;
int demo_mode_write_protect;
int prod_mode_write_protect;
int demo_mode_login_only;
int fabric_prot_type;
int jam_host;
};
struct tcm_qla2xxx_tpg {
/* FC lport target portal group tag for TCM */
u16 lport_tpgt;
/* Atomic bit to determine TPG active status */
atomic_t lport_tpg_enabled;
/* Pointer back to tcm_qla2xxx_lport */
struct tcm_qla2xxx_lport *lport;
/* Used by tcm_qla2xxx_tpg_attrib_cit */
struct tcm_qla2xxx_tpg_attrib tpg_attrib;
/* Returned by tcm_qla2xxx_make_tpg() */
struct se_portal_group se_tpg;
};
struct tcm_qla2xxx_fc_loopid {
struct se_node_acl *se_nacl;
};
struct tcm_qla2xxx_lport {
/* Binary World Wide unique Port Name for FC Target Lport */
u64 lport_wwpn;
/* Binary World Wide unique Port Name for FC NPIV Target Lport */
u64 lport_npiv_wwpn;
/* Binary World Wide unique Node Name for FC NPIV Target Lport */
u64 lport_npiv_wwnn;
/* ASCII formatted WWPN for FC Target Lport */
char lport_name[TCM_QLA2XXX_NAMELEN];
/* ASCII formatted naa WWPN for VPD page 83 etc */
char lport_naa_name[TCM_QLA2XXX_NAMELEN];
/* map for fc_port pointers in 24-bit FC Port ID space */
struct btree_head32 lport_fcport_map;
/* vmalloc-ed memory for fc_port pointers for 16-bit FC loop ID */
struct tcm_qla2xxx_fc_loopid *lport_loopid_map;
/* Pointer to struct scsi_qla_host from qla2xxx LLD */
struct scsi_qla_host *qla_vha;
/* Pointer to struct qla_tgt pointer */
struct qla_tgt lport_qla_tgt;
/* Pointer to TPG=1 for non NPIV mode */
struct tcm_qla2xxx_tpg *tpg_1;
/* Returned by tcm_qla2xxx_make_lport() */
struct se_wwn lport_wwn;
};