2 * Copyright (c) 2010 Cisco Systems, Inc.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
20 #define FT_VERSION "0.4"
22 #define FT_NAMELEN 32 /* length of ASCII WWPNs including pad */
23 #define FT_TPG_NAMELEN 32 /* max length of TPG name */
24 #define FT_LUN_NAMELEN 32 /* max length of LUN name */
25 #define TCM_FC_DEFAULT_TAGS 512 /* tags used for per-session preallocation */
27 struct ft_transport_id {
32 } __attribute__((__packed__));
35 * Session (remote port).
38 u32 port_id; /* for hash lookup use only */
40 u16 max_frame; /* maximum frame size */
41 u64 port_name; /* port name for transport ID */
42 struct ft_tport *tport;
43 struct se_session *se_sess;
44 struct hlist_node hash; /* linkage in ft_sess_hash table */
46 struct kref kref; /* ref for hash and outstanding I/Os */
50 * Hash table of sessions per local port.
51 * Hash lookup by remote port FC_ID.
53 #define FT_SESS_HASH_BITS 6
54 #define FT_SESS_HASH_SIZE (1 << FT_SESS_HASH_BITS)
57 * Per local port data.
58 * This is created only after a TPG exists that allows target function
59 * for the local port. If the TPG exists, this is allocated when
60 * we're notified that the local port has been created, or when
61 * the first PRLI provider callback is received.
64 struct fc_lport *lport;
65 struct ft_tpg *tpg; /* NULL if TPG deleted before tport */
66 u32 sess_count; /* number of sessions in hash */
68 struct hlist_head hash[FT_SESS_HASH_SIZE]; /* list of sessions */
72 * Node ID and authentication.
80 * Node ACL for FC remote port session.
83 struct ft_node_auth node_auth;
84 struct se_node_acl se_node_acl;
89 char name[FT_LUN_NAMELEN];
93 * Target portal group (local port).
97 struct ft_lport_wwn *lport_wwn;
98 struct ft_tport *tport; /* active tport or NULL */
99 struct list_head lun_list; /* head of LUNs */
100 struct se_portal_group se_tpg;
101 struct workqueue_struct *workqueue;
104 struct ft_lport_wwn {
106 char name[FT_NAMELEN];
107 struct list_head ft_wwn_node;
109 struct se_wwn se_wwn;
116 struct ft_sess *sess; /* session held for cmd */
117 struct fc_seq *seq; /* sequence in exchange mgr */
118 struct se_cmd se_cmd; /* Local TCM I/O descriptor */
119 struct fc_frame *req_frame;
120 u32 write_data_len; /* data received on writes */
121 struct work_struct work;
122 /* Local sense buffer */
123 unsigned char ft_sense_buffer[TRANSPORT_SENSE_BUFFER];
124 u32 was_ddp_setup:1; /* Set only if ddp is setup */
125 u32 aborted:1; /* Set if aborted by reset or timeout */
126 struct scatterlist *sg; /* Set only if DDP is setup */
127 u32 sg_cnt; /* No. of item in scatterlist */
130 extern struct mutex ft_lport_lock;
131 extern struct fc4_prov ft_prov;
132 extern unsigned int ft_debug_logging;
141 void ft_sess_put(struct ft_sess *);
142 int ft_sess_shutdown(struct se_session *);
143 void ft_sess_close(struct se_session *);
144 u32 ft_sess_get_index(struct se_session *);
145 u32 ft_sess_get_port_name(struct se_session *, unsigned char *, u32);
147 void ft_lport_add(struct fc_lport *, void *);
148 void ft_lport_del(struct fc_lport *, void *);
149 int ft_lport_notify(struct notifier_block *, unsigned long, void *);
154 int ft_check_stop_free(struct se_cmd *);
155 void ft_release_cmd(struct se_cmd *);
156 int ft_queue_status(struct se_cmd *);
157 int ft_queue_data_in(struct se_cmd *);
158 int ft_write_pending(struct se_cmd *);
159 int ft_write_pending_status(struct se_cmd *);
160 u32 ft_get_task_tag(struct se_cmd *);
161 int ft_get_cmd_state(struct se_cmd *);
162 void ft_queue_tm_resp(struct se_cmd *);
163 void ft_aborted_task(struct se_cmd *);
166 * other internal functions.
168 void ft_recv_req(struct ft_sess *, struct fc_frame *);
169 struct ft_tpg *ft_lport_find_tpg(struct fc_lport *);
170 struct ft_node_acl *ft_acl_get(struct ft_tpg *, struct fc_rport_priv *);
172 void ft_recv_write_data(struct ft_cmd *, struct fc_frame *);
173 void ft_dump_cmd(struct ft_cmd *, const char *caller);
175 ssize_t ft_format_wwn(char *, size_t, u64);
178 * Underlying HW specific helper function
180 void ft_invl_hw_context(struct ft_cmd *);
182 #endif /* __TCM_FC_H__ */