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https://github.com/SCST-project/scst.git
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546647be44
Add a method for template get_initiator_port_transport_id() to allow persistent reservations to work. Initialize struct ft_sess more fully before scst_register_session() so that ft_get_transport_id() can use it. git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1759 d57e44dd-8a1f-0410-8b47-8ef2f437770f
152 lines
4.6 KiB
C
152 lines
4.6 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 may redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* $Id$
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*/
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#ifndef __SCSI_FCST_H__
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#define __SCSI_FCST_H__
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#include "scst.h"
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#define FT_VERSION "0.3"
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#define FT_MODULE "fcst"
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#define FT_MAX_HW_PENDING_TIME 20 /* max I/O time in seconds */
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/*
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* Debug options.
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*/
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#define FT_DEBUG_CONF 0x01 /* configuration messages */
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#define FT_DEBUG_SESS 0x02 /* session messages */
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#define FT_DEBUG_IO 0x04 /* I/O operations */
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extern unsigned int ft_debug_logging; /* debug options */
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#define FT_ERR(fmt, args...) \
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printk(KERN_ERR FT_MODULE ": %s: " fmt, __func__, ##args)
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#define FT_DEBUG(mask, fmt, args...) \
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do { \
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if (ft_debug_logging & (mask)) \
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printk(KERN_INFO FT_MODULE ": %s: " fmt, \
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__func__, ##args); \
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} while (0)
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#define FT_CONF_DBG(fmt, args...) FT_DEBUG(FT_DEBUG_CONF, fmt, ##args)
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#define FT_SESS_DBG(fmt, args...) FT_DEBUG(FT_DEBUG_SESS, fmt, ##args)
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#define FT_IO_DBG(fmt, args...) FT_DEBUG(FT_DEBUG_IO, fmt, ##args)
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#define FT_NAMELEN 32 /* length of ASCI WWPNs including pad */
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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_payload; /* max transmitted payload size */
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u32 max_lso_payload; /* max offloaded payload 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 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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struct scst_session *scst_sess;
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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 when the first session logs into the local port.
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* Deleted when tpg is deleted or last session is logged off.
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*/
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struct ft_tport {
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u32 sess_count; /* number of sessions in hash */
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u8 enabled:1;
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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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struct fc_lport *lport;
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struct scst_tgt *tgt;
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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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int serial; /* order received, for debugging */
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struct fc_seq *seq; /* sequence in exchange mgr */
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struct fc_frame *req_frame; /* original request frame */
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u32 write_data_len; /* data received from initiator */
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u32 read_data_len; /* data sent to initiator */
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u32 xfer_rdy_len; /* max xfer ready offset */
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u32 max_lso_payload; /* max offloaded (LSO) data payload */
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u16 max_payload; /* max transmitted data payload */
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struct scst_cmd *scst_cmd;
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};
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extern struct list_head ft_lport_list;
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extern struct mutex ft_lport_lock;
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extern struct scst_tgt_template ft_scst_template;
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/*
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* libfc interface.
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*/
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int ft_prli(struct fc_rport_priv *, u32 spp_len,
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const struct fc_els_spp *, struct fc_els_spp *);
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void ft_prlo(struct fc_rport_priv *);
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void ft_recv(struct fc_lport *, struct fc_seq *, struct fc_frame *);
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/*
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* SCST interface.
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*/
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int ft_send_response(struct scst_cmd *);
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int ft_send_xfer_rdy(struct scst_cmd *);
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void ft_cmd_timeout(struct scst_cmd *);
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void ft_cmd_free(struct scst_cmd *);
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void ft_cmd_tm_done(struct scst_mgmt_cmd *);
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int ft_tgt_detect(struct scst_tgt_template *);
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int ft_tgt_release(struct scst_tgt *);
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int ft_tgt_enable(struct scst_tgt *, bool);
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bool ft_tgt_enabled(struct scst_tgt *);
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int ft_report_aen(struct scst_aen *);
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int ft_get_transport_id(struct scst_session *, uint8_t **);
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/*
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* Session interface.
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*/
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int ft_lport_notify(struct notifier_block *, unsigned long, void *);
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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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/*
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* other internal functions.
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*/
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int ft_thread(void *);
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void ft_recv_req(struct ft_sess *, struct fc_seq *, struct fc_frame *);
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void ft_recv_write_data(struct scst_cmd *, struct fc_frame *);
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int ft_send_read_data(struct scst_cmd *);
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struct ft_tpg *ft_lport_find_tpg(struct fc_lport *);
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struct ft_node_acl *ft_acl_get(struct ft_tpg *, struct fc_rport_priv *);
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void ft_cmd_dump(struct scst_cmd *, const char *);
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#endif /* __SCSI_FCST_H__ */
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