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numam-spdk/lib/scsi/scsi_internal.h
Changpeng Liu 8c0c8e5333 scsi: add persistent reservation SCSI commands check 
All the SCSI commands have two states: allowed and conflict,
based on different reservation types and I_T nexus, the SCSI
module will check each commands before sending to the backend
device.

Change-Id: Ib05cece1c237873360f85c68d139362200d2d47e
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/436097
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
2019-05-30 21:42:36 +00:00

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/*-
* BSD LICENSE
*
* Copyright (C) 2008-2012 Daisuke Aoyama <aoyama@peach.ne.jp>.
* Copyright (c) Intel Corporation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef SPDK_SCSI_INTERNAL_H
#define SPDK_SCSI_INTERNAL_H
#include "spdk/stdinc.h"
#include "spdk/bdev.h"
#include "spdk/scsi.h"
#include "spdk/scsi_spec.h"
#include "spdk/trace.h"
#include "spdk/dif.h"
#include "spdk_internal/log.h"
enum {
SPDK_SCSI_TASK_UNKNOWN = -1,
SPDK_SCSI_TASK_COMPLETE,
SPDK_SCSI_TASK_PENDING,
};
struct spdk_scsi_port {
uint8_t is_used;
uint64_t id;
uint16_t index;
uint16_t transport_id_len;
char transport_id[SPDK_SCSI_MAX_TRANSPORT_ID_LENGTH];
char name[SPDK_SCSI_PORT_MAX_NAME_LENGTH];
};
/* Registrant with I_T nextus */
struct spdk_scsi_pr_registrant {
uint64_t rkey;
uint16_t relative_target_port_id;
uint16_t transport_id_len;
char transport_id[SPDK_SCSI_MAX_TRANSPORT_ID_LENGTH];
char initiator_port_name[SPDK_SCSI_PORT_MAX_NAME_LENGTH];
char target_port_name[SPDK_SCSI_PORT_MAX_NAME_LENGTH];
struct spdk_scsi_port *initiator_port;
struct spdk_scsi_port *target_port;
TAILQ_ENTRY(spdk_scsi_pr_registrant) link;
};
/* Reservation with LU_SCOPE */
struct spdk_scsi_pr_reservation {
struct spdk_scsi_pr_registrant *holder;
enum spdk_scsi_pr_type_code rtype;
uint64_t crkey;
};
struct spdk_scsi_dev {
int id;
int is_allocated;
bool removed;
spdk_scsi_dev_destruct_cb_t remove_cb;
void *remove_ctx;
char name[SPDK_SCSI_DEV_MAX_NAME + 1];
struct spdk_scsi_lun *lun[SPDK_SCSI_DEV_MAX_LUN];
int num_ports;
struct spdk_scsi_port port[SPDK_SCSI_DEV_MAX_PORTS];
uint8_t protocol_id;
};
struct spdk_scsi_lun_desc {
struct spdk_scsi_lun *lun;
spdk_scsi_lun_remove_cb_t hotremove_cb;
void *hotremove_ctx;
TAILQ_ENTRY(spdk_scsi_lun_desc) link;
};
struct spdk_scsi_lun {
/** LUN id for this logical unit. */
int id;
/** Pointer to the SCSI device containing this LUN. */
struct spdk_scsi_dev *dev;
/** The bdev associated with this LUN. */
struct spdk_bdev *bdev;
/** Descriptor for opened block device. */
struct spdk_bdev_desc *bdev_desc;
/** I/O channel for the bdev associated with this LUN. */
struct spdk_io_channel *io_channel;
/** The reference number for this LUN, thus we can correctly free the io_channel */
uint32_t ref;
/** Poller to release the resource of the lun when it is hot removed */
struct spdk_poller *hotremove_poller;
/** The LUN is removed */
bool removed;
/** Callback to be fired when LUN removal is first triggered. */
void (*hotremove_cb)(const struct spdk_scsi_lun *lun, void *arg);
/** Argument for hotremove_cb */
void *hotremove_ctx;
/** Registrant head for I_T nexus */
TAILQ_HEAD(, spdk_scsi_pr_registrant) reg_head;
/** Persistent Reservation Generation */
uint32_t pr_generation;
/** Reservation for the LUN */
struct spdk_scsi_pr_reservation reservation;
/** List of open descriptors for this LUN. */
TAILQ_HEAD(, spdk_scsi_lun_desc) open_descs;
/** submitted tasks */
TAILQ_HEAD(tasks, spdk_scsi_task) tasks;
/** pending tasks */
TAILQ_HEAD(pending_tasks, spdk_scsi_task) pending_tasks;
/** submitted management tasks */
TAILQ_HEAD(mgmt_tasks, spdk_scsi_task) mgmt_tasks;
/** pending management tasks */
TAILQ_HEAD(pending_mgmt_tasks, spdk_scsi_task) pending_mgmt_tasks;
/** poller to check completion of tasks prior to reset */
struct spdk_poller *reset_poller;
};
struct spdk_lun_db_entry {
struct spdk_scsi_lun *lun;
struct spdk_lun_db_entry *next;
};
extern struct spdk_lun_db_entry *spdk_scsi_lun_list_head;
/* This typedef exists to work around an astyle 2.05 bug.
* Remove it when astyle is fixed.
*/
typedef struct spdk_scsi_lun _spdk_scsi_lun;
_spdk_scsi_lun *spdk_scsi_lun_construct(struct spdk_bdev *bdev,
void (*hotremove_cb)(const struct spdk_scsi_lun *, void *),
void *hotremove_ctx);
void spdk_scsi_lun_destruct(struct spdk_scsi_lun *lun);
void spdk_scsi_lun_append_task(struct spdk_scsi_lun *lun, struct spdk_scsi_task *task);
void spdk_scsi_lun_execute_tasks(struct spdk_scsi_lun *lun);
void spdk_scsi_lun_append_mgmt_task(struct spdk_scsi_lun *lun, struct spdk_scsi_task *task);
void spdk_scsi_lun_execute_mgmt_task(struct spdk_scsi_lun *lun);
bool spdk_scsi_lun_has_pending_mgmt_tasks(const struct spdk_scsi_lun *lun);
void spdk_scsi_lun_complete_task(struct spdk_scsi_lun *lun, struct spdk_scsi_task *task);
void spdk_scsi_lun_complete_reset_task(struct spdk_scsi_lun *lun, struct spdk_scsi_task *task);
bool spdk_scsi_lun_has_pending_tasks(const struct spdk_scsi_lun *lun);
int _spdk_scsi_lun_allocate_io_channel(struct spdk_scsi_lun *lun);
void _spdk_scsi_lun_free_io_channel(struct spdk_scsi_lun *lun);
struct spdk_scsi_dev *spdk_scsi_dev_get_list(void);
int spdk_scsi_port_construct(struct spdk_scsi_port *port, uint64_t id,
uint16_t index, const char *name);
void spdk_scsi_port_destruct(struct spdk_scsi_port *port);
int spdk_bdev_scsi_execute(struct spdk_scsi_task *task);
void spdk_bdev_scsi_reset(struct spdk_scsi_task *task);
bool spdk_scsi_bdev_get_dif_ctx(struct spdk_bdev *bdev, uint8_t *cdb, uint32_t offset,
struct spdk_dif_ctx *dif_ctx);
int spdk_scsi_pr_out(struct spdk_scsi_task *task, uint8_t *cdb, uint8_t *data, uint16_t data_len);
int spdk_scsi_pr_in(struct spdk_scsi_task *task, uint8_t *cdb, uint8_t *data, uint16_t data_len);
int spdk_scsi_pr_check(struct spdk_scsi_task *task);
struct spdk_scsi_globals {
pthread_mutex_t mutex;
};
extern struct spdk_scsi_globals g_spdk_scsi;
#endif /* SPDK_SCSI_INTERNAL_H */
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