169 lines
4.1 KiB
C
169 lines
4.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (c) 2010 Cisco Systems, Inc.
|
|
*/
|
|
#ifndef __TCM_FC_H__
|
|
#define __TCM_FC_H__
|
|
|
|
#include <linux/types.h>
|
|
#include <target/target_core_base.h>
|
|
|
|
#define FT_VERSION "0.4"
|
|
|
|
#define FT_NAMELEN 32 /* length of ASCII WWPNs including pad */
|
|
#define FT_TPG_NAMELEN 32 /* max length of TPG name */
|
|
#define FT_LUN_NAMELEN 32 /* max length of LUN name */
|
|
#define TCM_FC_DEFAULT_TAGS 512 /* tags used for per-session preallocation */
|
|
|
|
struct ft_transport_id {
|
|
__u8 format;
|
|
__u8 __resvd1[7];
|
|
__u8 wwpn[8];
|
|
__u8 __resvd2[8];
|
|
} __attribute__((__packed__));
|
|
|
|
/*
|
|
* Session (remote port).
|
|
*/
|
|
struct ft_sess {
|
|
u32 port_id; /* for hash lookup use only */
|
|
u32 params;
|
|
u16 max_frame; /* maximum frame size */
|
|
u64 port_name; /* port name for transport ID */
|
|
struct ft_tport *tport;
|
|
struct se_session *se_sess;
|
|
struct hlist_node hash; /* linkage in ft_sess_hash table */
|
|
struct rcu_head rcu;
|
|
struct kref kref; /* ref for hash and outstanding I/Os */
|
|
};
|
|
|
|
/*
|
|
* Hash table of sessions per local port.
|
|
* Hash lookup by remote port FC_ID.
|
|
*/
|
|
#define FT_SESS_HASH_BITS 6
|
|
#define FT_SESS_HASH_SIZE (1 << FT_SESS_HASH_BITS)
|
|
|
|
/*
|
|
* Per local port data.
|
|
* This is created only after a TPG exists that allows target function
|
|
* for the local port. If the TPG exists, this is allocated when
|
|
* we're notified that the local port has been created, or when
|
|
* the first PRLI provider callback is received.
|
|
*/
|
|
struct ft_tport {
|
|
struct fc_lport *lport;
|
|
struct ft_tpg *tpg; /* NULL if TPG deleted before tport */
|
|
u32 sess_count; /* number of sessions in hash */
|
|
struct rcu_head rcu;
|
|
struct hlist_head hash[FT_SESS_HASH_SIZE]; /* list of sessions */
|
|
};
|
|
|
|
/*
|
|
* Node ID and authentication.
|
|
*/
|
|
struct ft_node_auth {
|
|
u64 port_name;
|
|
u64 node_name;
|
|
};
|
|
|
|
/*
|
|
* Node ACL for FC remote port session.
|
|
*/
|
|
struct ft_node_acl {
|
|
struct se_node_acl se_node_acl;
|
|
struct ft_node_auth node_auth;
|
|
};
|
|
|
|
struct ft_lun {
|
|
u32 index;
|
|
char name[FT_LUN_NAMELEN];
|
|
};
|
|
|
|
/*
|
|
* Target portal group (local port).
|
|
*/
|
|
struct ft_tpg {
|
|
u32 index;
|
|
struct ft_lport_wwn *lport_wwn;
|
|
struct ft_tport *tport; /* active tport or NULL */
|
|
struct list_head lun_list; /* head of LUNs */
|
|
struct se_portal_group se_tpg;
|
|
struct workqueue_struct *workqueue;
|
|
};
|
|
|
|
struct ft_lport_wwn {
|
|
u64 wwpn;
|
|
char name[FT_NAMELEN];
|
|
struct list_head ft_wwn_node;
|
|
struct ft_tpg *tpg;
|
|
struct se_wwn se_wwn;
|
|
};
|
|
|
|
/*
|
|
* Commands
|
|
*/
|
|
struct ft_cmd {
|
|
struct ft_sess *sess; /* session held for cmd */
|
|
struct fc_seq *seq; /* sequence in exchange mgr */
|
|
struct se_cmd se_cmd; /* Local TCM I/O descriptor */
|
|
struct fc_frame *req_frame;
|
|
u32 write_data_len; /* data received on writes */
|
|
struct work_struct work;
|
|
/* Local sense buffer */
|
|
unsigned char ft_sense_buffer[TRANSPORT_SENSE_BUFFER];
|
|
u32 was_ddp_setup:1; /* Set only if ddp is setup */
|
|
u32 aborted:1; /* Set if aborted by reset or timeout */
|
|
struct scatterlist *sg; /* Set only if DDP is setup */
|
|
u32 sg_cnt; /* No. of item in scatterlist */
|
|
};
|
|
|
|
extern struct mutex ft_lport_lock;
|
|
extern struct fc4_prov ft_prov;
|
|
extern unsigned int ft_debug_logging;
|
|
|
|
/*
|
|
* Fabric methods.
|
|
*/
|
|
|
|
/*
|
|
* Session ops.
|
|
*/
|
|
void ft_sess_put(struct ft_sess *);
|
|
void ft_sess_close(struct se_session *);
|
|
u32 ft_sess_get_index(struct se_session *);
|
|
u32 ft_sess_get_port_name(struct se_session *, unsigned char *, u32);
|
|
|
|
void ft_lport_add(struct fc_lport *, void *);
|
|
void ft_lport_del(struct fc_lport *, void *);
|
|
int ft_lport_notify(struct notifier_block *, unsigned long, void *);
|
|
|
|
/*
|
|
* IO methods.
|
|
*/
|
|
int ft_check_stop_free(struct se_cmd *);
|
|
void ft_release_cmd(struct se_cmd *);
|
|
int ft_queue_status(struct se_cmd *);
|
|
int ft_queue_data_in(struct se_cmd *);
|
|
int ft_write_pending(struct se_cmd *);
|
|
void ft_queue_tm_resp(struct se_cmd *);
|
|
void ft_aborted_task(struct se_cmd *);
|
|
|
|
/*
|
|
* other internal functions.
|
|
*/
|
|
void ft_recv_req(struct ft_sess *, struct fc_frame *);
|
|
struct ft_tpg *ft_lport_find_tpg(struct fc_lport *);
|
|
|
|
void ft_recv_write_data(struct ft_cmd *, struct fc_frame *);
|
|
void ft_dump_cmd(struct ft_cmd *, const char *caller);
|
|
|
|
ssize_t ft_format_wwn(char *, size_t, u64);
|
|
|
|
/*
|
|
* Underlying HW specific helper function
|
|
*/
|
|
void ft_invl_hw_context(struct ft_cmd *);
|
|
|
|
#endif /* __TCM_FC_H__ */
|