183 lines
4.8 KiB
C
183 lines
4.8 KiB
C
/*
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* Copyright (c) 2010 Cisco Systems, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef __TCM_FC_H__
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#define __TCM_FC_H__
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#include <linux/types.h>
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#include <target/target_core_base.h>
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#define FT_VERSION "0.4"
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#define FT_NAMELEN 32 /* length of ASCII WWPNs including pad */
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#define FT_TPG_NAMELEN 32 /* max length of TPG name */
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#define FT_LUN_NAMELEN 32 /* max length of LUN name */
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#define TCM_FC_DEFAULT_TAGS 512 /* tags used for per-session preallocation */
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struct ft_transport_id {
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__u8 format;
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__u8 __resvd1[7];
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__u8 wwpn[8];
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__u8 __resvd2[8];
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} __attribute__((__packed__));
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/*
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* Session (remote port).
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*/
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struct ft_sess {
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u32 port_id; /* for hash lookup use only */
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u32 params;
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u16 max_frame; /* maximum frame size */
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u64 port_name; /* port name for transport ID */
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struct ft_tport *tport;
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struct se_session *se_sess;
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struct hlist_node hash; /* linkage in ft_sess_hash table */
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struct rcu_head rcu;
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struct kref kref; /* ref for hash and outstanding I/Os */
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};
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/*
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* Hash table of sessions per local port.
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* Hash lookup by remote port FC_ID.
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*/
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#define FT_SESS_HASH_BITS 6
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#define FT_SESS_HASH_SIZE (1 << FT_SESS_HASH_BITS)
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/*
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* Per local port data.
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* This is created only after a TPG exists that allows target function
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* for the local port. If the TPG exists, this is allocated when
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* we're notified that the local port has been created, or when
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* the first PRLI provider callback is received.
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*/
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struct ft_tport {
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struct fc_lport *lport;
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struct ft_tpg *tpg; /* NULL if TPG deleted before tport */
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u32 sess_count; /* number of sessions in hash */
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struct rcu_head rcu;
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struct hlist_head hash[FT_SESS_HASH_SIZE]; /* list of sessions */
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};
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/*
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* Node ID and authentication.
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*/
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struct ft_node_auth {
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u64 port_name;
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u64 node_name;
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};
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/*
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* Node ACL for FC remote port session.
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*/
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struct ft_node_acl {
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struct se_node_acl se_node_acl;
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struct ft_node_auth node_auth;
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};
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struct ft_lun {
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u32 index;
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char name[FT_LUN_NAMELEN];
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};
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/*
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* Target portal group (local port).
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*/
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struct ft_tpg {
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u32 index;
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struct ft_lport_wwn *lport_wwn;
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struct ft_tport *tport; /* active tport or NULL */
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struct list_head lun_list; /* head of LUNs */
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struct se_portal_group se_tpg;
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struct workqueue_struct *workqueue;
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};
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struct ft_lport_wwn {
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u64 wwpn;
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char name[FT_NAMELEN];
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struct list_head ft_wwn_node;
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struct ft_tpg *tpg;
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struct se_wwn se_wwn;
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};
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/*
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* Commands
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*/
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struct ft_cmd {
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struct ft_sess *sess; /* session held for cmd */
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struct fc_seq *seq; /* sequence in exchange mgr */
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struct se_cmd se_cmd; /* Local TCM I/O descriptor */
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struct fc_frame *req_frame;
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u32 write_data_len; /* data received on writes */
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struct work_struct work;
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/* Local sense buffer */
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unsigned char ft_sense_buffer[TRANSPORT_SENSE_BUFFER];
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u32 was_ddp_setup:1; /* Set only if ddp is setup */
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u32 aborted:1; /* Set if aborted by reset or timeout */
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struct scatterlist *sg; /* Set only if DDP is setup */
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u32 sg_cnt; /* No. of item in scatterlist */
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};
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extern struct mutex ft_lport_lock;
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extern struct fc4_prov ft_prov;
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extern unsigned int ft_debug_logging;
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/*
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* Fabric methods.
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*/
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/*
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* Session ops.
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*/
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void ft_sess_put(struct ft_sess *);
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void ft_sess_close(struct se_session *);
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u32 ft_sess_get_index(struct se_session *);
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u32 ft_sess_get_port_name(struct se_session *, unsigned char *, u32);
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void ft_lport_add(struct fc_lport *, void *);
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void ft_lport_del(struct fc_lport *, void *);
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int ft_lport_notify(struct notifier_block *, unsigned long, void *);
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/*
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* IO methods.
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*/
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int ft_check_stop_free(struct se_cmd *);
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void ft_release_cmd(struct se_cmd *);
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int ft_queue_status(struct se_cmd *);
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int ft_queue_data_in(struct se_cmd *);
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int ft_write_pending(struct se_cmd *);
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int ft_write_pending_status(struct se_cmd *);
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int ft_get_cmd_state(struct se_cmd *);
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void ft_queue_tm_resp(struct se_cmd *);
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void ft_aborted_task(struct se_cmd *);
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/*
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* other internal functions.
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*/
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void ft_recv_req(struct ft_sess *, struct fc_frame *);
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struct ft_tpg *ft_lport_find_tpg(struct fc_lport *);
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void ft_recv_write_data(struct ft_cmd *, struct fc_frame *);
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void ft_dump_cmd(struct ft_cmd *, const char *caller);
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ssize_t ft_format_wwn(char *, size_t, u64);
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/*
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* Underlying HW specific helper function
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*/
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void ft_invl_hw_context(struct ft_cmd *);
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#endif /* __TCM_FC_H__ */
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