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https://github.com/SCST-project/scst.git
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20a2e4ae8d
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@408 d57e44dd-8a1f-0410-8b47-8ef2f437770f
121 lines
2.9 KiB
C
121 lines
2.9 KiB
C
/*
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* common.h
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*
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* Copyright (C) 2007 - 2008 Vladislav Bolkhovitin <vst@vlnb.net>
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* Copyright (C) 2007 - 2008 CMS Distribution Limited
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2
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* of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <scst_user.h>
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#include "debug.h"
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/* 8 byte ASCII Vendor */
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#define VENDOR "SCST_USR"
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/* 4 byte ASCII Product Revision Level - left aligned */
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#define FIO_REV " 096"
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#define MAX_USN_LEN 20
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#define INQ_BUF_SZ 128
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#define EVPD 0x01
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#define CMDDT 0x02
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#define MSENSE_BUF_SZ 256
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#define DBD 0x08 /* disable block descriptor */
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#define WP 0x80 /* write protect */
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#define DPOFUA 0x10 /* DPOFUA bit */
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#define WCE 0x04 /* write cache enable */
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#define PF 0x10 /* page format */
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#define SP 0x01 /* save pages */
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#define PS 0x80 /* parameter saveable */
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#define BYTE 8
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#define DEF_SECTORS_PER 63
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struct vdisk_tgt_dev {
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uint64_t sess_h;
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/*
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* Used without protection since we are guaranteed by SCST core
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* that only commands with the same ORDERED type per tgt_dev can
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* be processed simultaneously.
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*/
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int last_write_cmd_queue_type;
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};
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struct vdisk_dev {
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int scst_usr_fd;
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uint32_t block_size;
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uint64_t nblocks;
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int block_shift;
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loff_t file_size; /* in bytes */
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void *(*alloc_fn)(size_t size);
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pthread_mutex_t dev_mutex;
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/* Below flags and are protected by dev_mutex */
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unsigned int rd_only_flag:1;
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unsigned int wt_flag:1;
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unsigned int nv_cache:1;
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unsigned int o_direct_flag:1;
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unsigned int media_changed:1;
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unsigned int prevent_allow_medium_removal:1;
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unsigned int nullio:1;
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unsigned int cdrom_empty:1;
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unsigned int non_blocking:1;
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#if defined(DEBUG_TM_IGNORE) || defined(DEBUG_TM_IGNORE_ALL)
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unsigned int debug_tm_ignore:1;
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#if defined(DEBUG_TM_IGNORE_ALL)
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volatile int debug_tm_ignore_all;
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#endif
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#endif
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struct vdisk_tgt_dev tgt_devs[25];
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char *name; /* Name of virtual device,
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must be <= SCSI Model + 1 */
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char *file_name; /* File name */
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char *usn;
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int type;
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};
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struct vdisk_cmd
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{
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int fd;
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struct scst_user_get_cmd *cmd;
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struct vdisk_dev *dev;
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struct scst_user_reply_cmd *reply;
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uint8_t sense[SCST_SENSE_BUFFERSIZE];
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};
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/*
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* min()/max() macros that also do
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* strict type-checking.. See the
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* "unnecessary" pointer comparison.
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*/
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#define min(x,y) ({ \
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typeof(x) _x = (x); \
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typeof(y) _y = (y); \
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(void) (&_x == &_y); \
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_x < _y ? _x : _y; })
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#define max(x,y) ({ \
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typeof(x) _x = (x); \
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typeof(y) _y = (y); \
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(void) (&_x == &_y); \
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_x > _y ? _x : _y; })
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#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
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void *main_loop(void *arg);
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