blob: 2740a90501a09e8341b809b5dffef42bde5f8c02 [file] [log] [blame]
/*
* vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
* Copyright (C) 1992 Eric Youngdale
* Simulate a host adapter with 2 disks attached. Do a lot of checking
* to make sure that we are not getting blocks mixed up, and PANIC if
* anything out of the ordinary is seen.
* ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
*
* Copyright (C) 2001 - 2018 Douglas Gilbert
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* For documentation see http://sg.danny.cz/sg/sdebug26.html
*
*/
#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/jiffies.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/genhd.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/proc_fs.h>
#include <linux/vmalloc.h>
#include <linux/moduleparam.h>
#include <linux/scatterlist.h>
#include <linux/blkdev.h>
#include <linux/crc-t10dif.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/atomic.h>
#include <linux/hrtimer.h>
#include <linux/uuid.h>
#include <linux/t10-pi.h>
#include <net/checksum.h>
#include <asm/unaligned.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsicam.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_dbg.h>
#include "sd.h"
#include "scsi_logging.h"
/* make sure inq_product_rev string corresponds to this version */
#define SDEBUG_VERSION "0188" /* format to fit INQUIRY revision field */
static const char *sdebug_version_date = "20190125";
#define MY_NAME "scsi_debug"
/* Additional Sense Code (ASC) */
#define NO_ADDITIONAL_SENSE 0x0
#define LOGICAL_UNIT_NOT_READY 0x4
#define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
#define UNRECOVERED_READ_ERR 0x11
#define PARAMETER_LIST_LENGTH_ERR 0x1a
#define INVALID_OPCODE 0x20
#define LBA_OUT_OF_RANGE 0x21
#define INVALID_FIELD_IN_CDB 0x24
#define INVALID_FIELD_IN_PARAM_LIST 0x26
#define WRITE_PROTECTED 0x27
#define UA_RESET_ASC 0x29
#define UA_CHANGED_ASC 0x2a
#define TARGET_CHANGED_ASC 0x3f
#define LUNS_CHANGED_ASCQ 0x0e
#define INSUFF_RES_ASC 0x55
#define INSUFF_RES_ASCQ 0x3
#define POWER_ON_RESET_ASCQ 0x0
#define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
#define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
#define CAPACITY_CHANGED_ASCQ 0x9
#define SAVING_PARAMS_UNSUP 0x39
#define TRANSPORT_PROBLEM 0x4b
#define THRESHOLD_EXCEEDED 0x5d
#define LOW_POWER_COND_ON 0x5e
#define MISCOMPARE_VERIFY_ASC 0x1d
#define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
#define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
#define WRITE_ERROR_ASC 0xc
/* Additional Sense Code Qualifier (ASCQ) */
#define ACK_NAK_TO 0x3
/* Default values for driver parameters */
#define DEF_NUM_HOST 1
#define DEF_NUM_TGTS 1
#define DEF_MAX_LUNS 1
/* With these defaults, this driver will make 1 host with 1 target
* (id 0) containing 1 logical unit (lun 0). That is 1 device.
*/
#define DEF_ATO 1
#define DEF_CDB_LEN 10
#define DEF_JDELAY 1 /* if > 0 unit is a jiffy */
#define DEF_DEV_SIZE_MB 8
#define DEF_DIF 0
#define DEF_DIX 0
#define DEF_D_SENSE 0
#define DEF_EVERY_NTH 0
#define DEF_FAKE_RW 0
#define DEF_GUARD 0
#define DEF_HOST_LOCK 0
#define DEF_LBPU 0
#define DEF_LBPWS 0
#define DEF_LBPWS10 0
#define DEF_LBPRZ 1
#define DEF_LOWEST_ALIGNED 0
#define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
#define DEF_NO_LUN_0 0
#define DEF_NUM_PARTS 0
#define DEF_OPTS 0
#define DEF_OPT_BLKS 1024
#define DEF_PHYSBLK_EXP 0
#define DEF_OPT_XFERLEN_EXP 0
#define DEF_PTYPE TYPE_DISK
#define DEF_REMOVABLE false
#define DEF_SCSI_LEVEL 7 /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */
#define DEF_SECTOR_SIZE 512
#define DEF_UNMAP_ALIGNMENT 0
#define DEF_UNMAP_GRANULARITY 1
#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
#define DEF_UNMAP_MAX_DESC 256
#define DEF_VIRTUAL_GB 0
#define DEF_VPD_USE_HOSTNO 1
#define DEF_WRITESAME_LENGTH 0xFFFF
#define DEF_STRICT 0
#define DEF_STATISTICS false
#define DEF_SUBMIT_QUEUES 1
#define DEF_UUID_CTL 0
#define JDELAY_OVERRIDDEN -9999
#define SDEBUG_LUN_0_VAL 0
/* bit mask values for sdebug_opts */
#define SDEBUG_OPT_NOISE 1
#define SDEBUG_OPT_MEDIUM_ERR 2
#define SDEBUG_OPT_TIMEOUT 4
#define SDEBUG_OPT_RECOVERED_ERR 8
#define SDEBUG_OPT_TRANSPORT_ERR 16
#define SDEBUG_OPT_DIF_ERR 32
#define SDEBUG_OPT_DIX_ERR 64
#define SDEBUG_OPT_MAC_TIMEOUT 128
#define SDEBUG_OPT_SHORT_TRANSFER 0x100
#define SDEBUG_OPT_Q_NOISE 0x200
#define SDEBUG_OPT_ALL_TSF 0x400
#define SDEBUG_OPT_RARE_TSF 0x800
#define SDEBUG_OPT_N_WCE 0x1000
#define SDEBUG_OPT_RESET_NOISE 0x2000
#define SDEBUG_OPT_NO_CDB_NOISE 0x4000
#define SDEBUG_OPT_HOST_BUSY 0x8000
#define SDEBUG_OPT_CMD_ABORT 0x10000
#define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \
SDEBUG_OPT_RESET_NOISE)
#define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \
SDEBUG_OPT_TRANSPORT_ERR | \
SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \
SDEBUG_OPT_SHORT_TRANSFER | \
SDEBUG_OPT_HOST_BUSY | \
SDEBUG_OPT_CMD_ABORT)
/* When "every_nth" > 0 then modulo "every_nth" commands:
* - a missing response is simulated if SDEBUG_OPT_TIMEOUT is set
* - a RECOVERED_ERROR is simulated on successful read and write
* commands if SDEBUG_OPT_RECOVERED_ERR is set.
* - a TRANSPORT_ERROR is simulated on successful read and write
* commands if SDEBUG_OPT_TRANSPORT_ERR is set.
* - similarly for DIF_ERR, DIX_ERR, SHORT_TRANSFER, HOST_BUSY and
* CMD_ABORT
*
* When "every_nth" < 0 then after "- every_nth" commands the selected
* error will be injected. The error will be injected on every subsequent
* command until some other action occurs; for example, the user writing
* a new value (other than -1 or 1) to every_nth:
* echo 0 > /sys/bus/pseudo/drivers/scsi_debug/every_nth
*/
/* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs) are returned in
* priority order. In the subset implemented here lower numbers have higher
* priority. The UA numbers should be a sequence starting from 0 with
* SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
#define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
#define SDEBUG_UA_BUS_RESET 1
#define SDEBUG_UA_MODE_CHANGED 2
#define SDEBUG_UA_CAPACITY_CHANGED 3
#define SDEBUG_UA_LUNS_CHANGED 4
#define SDEBUG_UA_MICROCODE_CHANGED 5 /* simulate firmware change */
#define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 6
#define SDEBUG_NUM_UAS 7
/* when 1==SDEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
* sector on read commands: */
#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
/* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
* or "peripheral device" addressing (value 0) */
#define SAM2_LUN_ADDRESS_METHOD 0
/* SDEBUG_CANQUEUE is the maximum number of commands that can be queued
* (for response) per submit queue at one time. Can be reduced by max_queue
* option. Command responses are not queued when jdelay=0 and ndelay=0. The
* per-device DEF_CMD_PER_LUN can be changed via sysfs:
* /sys/class/scsi_device/<h:c:t:l>/device/queue_depth
* but cannot exceed SDEBUG_CANQUEUE .
*/
#define SDEBUG_CANQUEUE_WORDS 3 /* a WORD is bits in a long */
#define SDEBUG_CANQUEUE (SDEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
#define DEF_CMD_PER_LUN 255
#define F_D_IN 1
#define F_D_OUT 2
#define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
#define F_D_UNKN 8
#define F_RL_WLUN_OK 0x10
#define F_SKIP_UA 0x20
#define F_DELAY_OVERR 0x40
#define F_SA_LOW 0x80 /* cdb byte 1, bits 4 to 0 */
#define F_SA_HIGH 0x100 /* as used by variable length cdbs */
#define F_INV_OP 0x200
#define F_FAKE_RW 0x400
#define F_M_ACCESS 0x800 /* media access */
#define F_SSU_DELAY 0x1000
#define F_SYNC_DELAY 0x2000
#define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
#define FF_MEDIA_IO (F_M_ACCESS | F_FAKE_RW)
#define FF_SA (F_SA_HIGH | F_SA_LOW)
#define F_LONG_DELAY (F_SSU_DELAY | F_SYNC_DELAY)
#define SDEBUG_MAX_PARTS 4
#define SDEBUG_MAX_CMD_LEN 32
struct sdebug_dev_info {
struct list_head dev_list;
unsigned int channel;
unsigned int target;
u64 lun;
uuid_t lu_name;
struct sdebug_host_info *sdbg_host;
unsigned long uas_bm[1];
atomic_t num_in_q;
atomic_t stopped;
bool used;
};
struct sdebug_host_info {
struct list_head host_list;
struct Scsi_Host *shost;
struct device dev;
struct list_head dev_info_list;
};
#define to_sdebug_host(d) \
container_of(d, struct sdebug_host_info, dev)
enum sdeb_defer_type {SDEB_DEFER_NONE = 0, SDEB_DEFER_HRT = 1,
SDEB_DEFER_WQ = 2};
struct sdebug_defer {
struct hrtimer hrt;
struct execute_work ew;
int sqa_idx; /* index of sdebug_queue array */
int qc_idx; /* index of sdebug_queued_cmd array within sqa_idx */
int issuing_cpu;
bool init_hrt;
bool init_wq;
bool aborted; /* true when blk_abort_request() already called */
enum sdeb_defer_type defer_t;
};
struct sdebug_queued_cmd {
/* corresponding bit set in in_use_bm[] in owning struct sdebug_queue
* instance indicates this slot is in use.
*/
struct sdebug_defer *sd_dp;
struct scsi_cmnd *a_cmnd;
unsigned int inj_recovered:1;
unsigned int inj_transport:1;
unsigned int inj_dif:1;
unsigned int inj_dix:1;
unsigned int inj_short:1;
unsigned int inj_host_busy:1;
unsigned int inj_cmd_abort:1;
};
struct sdebug_queue {
struct sdebug_queued_cmd qc_arr[SDEBUG_CANQUEUE];
unsigned long in_use_bm[SDEBUG_CANQUEUE_WORDS];
spinlock_t qc_lock;
atomic_t blocked; /* to temporarily stop more being queued */
};
static atomic_t sdebug_cmnd_count; /* number of incoming commands */
static atomic_t sdebug_completions; /* count of deferred completions */
static atomic_t sdebug_miss_cpus; /* submission + completion cpus differ */
static atomic_t sdebug_a_tsf; /* 'almost task set full' counter */
struct opcode_info_t {
u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff */
/* for terminating element */
u8 opcode; /* if num_attached > 0, preferred */
u16 sa; /* service action */
u32 flags; /* OR-ed set of SDEB_F_* */
int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
const struct opcode_info_t *arrp; /* num_attached elements or NULL */
u8 len_mask[16]; /* len_mask[0]-->cdb_len, then mask for cdb */
/* 1 to min(cdb_len, 15); ignore cdb[15...] */
};
/* SCSI opcodes (first byte of cdb) of interest mapped onto these indexes */
enum sdeb_opcode_index {
SDEB_I_INVALID_OPCODE = 0,
SDEB_I_INQUIRY = 1,
SDEB_I_REPORT_LUNS = 2,
SDEB_I_REQUEST_SENSE = 3,
SDEB_I_TEST_UNIT_READY = 4,
SDEB_I_MODE_SENSE = 5, /* 6, 10 */
SDEB_I_MODE_SELECT = 6, /* 6, 10 */
SDEB_I_LOG_SENSE = 7,
SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
SDEB_I_READ = 9, /* 6, 10, 12, 16 */
SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
SDEB_I_START_STOP = 11,
SDEB_I_SERV_ACT_IN_16 = 12, /* add ...SERV_ACT_IN_12 if needed */
SDEB_I_SERV_ACT_OUT_16 = 13, /* add ...SERV_ACT_OUT_12 if needed */
SDEB_I_MAINT_IN = 14,
SDEB_I_MAINT_OUT = 15,
SDEB_I_VERIFY = 16, /* 10 only */
SDEB_I_VARIABLE_LEN = 17, /* READ(32), WRITE(32), WR_SCAT(32) */
SDEB_I_RESERVE = 18, /* 6, 10 */
SDEB_I_RELEASE = 19, /* 6, 10 */
SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
SDEB_I_ATA_PT = 22, /* 12, 16 */
SDEB_I_SEND_DIAG = 23,
SDEB_I_UNMAP = 24,
SDEB_I_WRITE_BUFFER = 25,
SDEB_I_WRITE_SAME = 26, /* 10, 16 */
SDEB_I_SYNC_CACHE = 27, /* 10, 16 */
SDEB_I_COMP_WRITE = 28,
SDEB_I_LAST_ELEMENT = 29, /* keep this last (previous + 1) */
};
static const unsigned char opcode_ind_arr[256] = {
/* 0x0; 0x0->0x1f: 6 byte cdbs */
SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
0, 0, 0, 0,
SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
SDEB_I_RELEASE,
0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
SDEB_I_ALLOW_REMOVAL, 0,
/* 0x20; 0x20->0x3f: 10 byte cdbs */
0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
0, 0, 0, 0, 0, SDEB_I_SYNC_CACHE, 0, 0,
0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
/* 0x40; 0x40->0x5f: 10 byte cdbs */
0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
0, 0, 0, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
SDEB_I_RELEASE,
0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
/* 0x60; 0x60->0x7d are reserved, 0x7e is "extended cdb" */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, SDEB_I_VARIABLE_LEN,
/* 0x80; 0x80->0x9f: 16 byte cdbs */
0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0, 0, 0, 0, 0,
0, SDEB_I_SYNC_CACHE, 0, SDEB_I_WRITE_SAME, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN_16, SDEB_I_SERV_ACT_OUT_16,
/* 0xa0; 0xa0->0xbf: 12 byte cdbs */
SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
SDEB_I_MAINT_OUT, 0, 0, 0,
SDEB_I_READ, 0 /* SDEB_I_SERV_ACT_OUT_12 */, SDEB_I_WRITE,
0 /* SDEB_I_SERV_ACT_IN_12 */, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
/* 0xc0; 0xc0->0xff: vendor specific */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
};
/*
* The following "response" functions return the SCSI mid-level's 4 byte
* tuple-in-an-int. To handle commands with an IMMED bit, for a faster
* command completion, they can mask their return value with
* SDEG_RES_IMMED_MASK .
*/
#define SDEG_RES_IMMED_MASK 0x40000000
static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_write_scat(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_sync_cache(struct scsi_cmnd *, struct sdebug_dev_info *);
/*
* The following are overflow arrays for cdbs that "hit" the same index in
* the opcode_info_arr array. The most time sensitive (or commonly used) cdb
* should be placed in opcode_info_arr[], the others should be placed here.
*/
static const struct opcode_info_t msense_iarr[] = {
{0, 0x1a, 0, F_D_IN, NULL, NULL,
{6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
};
static const struct opcode_info_t mselect_iarr[] = {
{0, 0x15, 0, F_D_OUT, NULL, NULL,
{6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
};
static const struct opcode_info_t read_iarr[] = {
{0, 0x28, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(10) */
{10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
0, 0, 0, 0} },
{0, 0x8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL, /* READ(6) */
{6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{0, 0xa8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(12) */
{12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf,
0xc7, 0, 0, 0, 0} },
};
static const struct opcode_info_t write_iarr[] = {
{0, 0x2a, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(10) */
NULL, {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7,
0, 0, 0, 0, 0, 0} },
{0, 0xa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(6) */
NULL, {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0} },
{0, 0xaa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(12) */
NULL, {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xbf, 0xc7, 0, 0, 0, 0} },
};
static const struct opcode_info_t sa_in_16_iarr[] = {
{0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
{16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0, 0xc7} }, /* GET LBA STATUS(16) */
};
static const struct opcode_info_t vl_iarr[] = { /* VARIABLE LENGTH */
{0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_dt0,
NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0xb, 0xfa,
0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
{0, 0x7f, 0x11, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x11, 0xf8,
0, 0xff, 0xff, 0x0, 0x0} }, /* WRITE SCATTERED(32) */
};
static const struct opcode_info_t maint_in_iarr[] = { /* MAINT IN */
{0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
{12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
0xc7, 0, 0, 0, 0} }, /* REPORT SUPPORTED OPERATION CODES */
{0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
{12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
0, 0} }, /* REPORTED SUPPORTED TASK MANAGEMENT FUNCTIONS */
};
static const struct opcode_info_t write_same_iarr[] = {
{0, 0x93, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_write_same_16, NULL,
{16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* WRITE SAME(16) */
};
static const struct opcode_info_t reserve_iarr[] = {
{0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
{6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
};
static const struct opcode_info_t release_iarr[] = {
{0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
{6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
};
static const struct opcode_info_t sync_cache_iarr[] = {
{0, 0x91, 0, F_SYNC_DELAY | F_M_ACCESS, resp_sync_cache, NULL,
{16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* SYNC_CACHE (16) */
};
/* This array is accessed via SDEB_I_* values. Make sure all are mapped,
* plus the terminating elements for logic that scans this table such as
* REPORT SUPPORTED OPERATION CODES. */
static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEMENT + 1] = {
/* 0 */
{0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* unknown opcodes */
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL, /* INQUIRY */
{6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
{12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
0, 0} }, /* REPORT LUNS */
{0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
{6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
{6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
/* 5 */
{ARRAY_SIZE(msense_iarr), 0x5a, 0, F_D_IN, /* MODE SENSE(10) */
resp_mode_sense, msense_iarr, {10, 0xf8, 0xff, 0xff, 0, 0, 0,
0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
{ARRAY_SIZE(mselect_iarr), 0x55, 0, F_D_OUT, /* MODE SELECT(10) */
resp_mode_select, mselect_iarr, {10, 0xf1, 0, 0, 0, 0, 0, 0xff,
0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
{0, 0x4d, 0, F_D_IN, resp_log_sense, NULL, /* LOG SENSE */
{10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
0, 0, 0} },
{0, 0x25, 0, F_D_IN, resp_readcap, NULL, /* READ CAPACITY(10) */
{10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
0, 0} },
{ARRAY_SIZE(read_iarr), 0x88, 0, F_D_IN | FF_MEDIA_IO, /* READ(16) */
resp_read_dt0, read_iarr, {16, 0xfe, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
/* 10 */
{ARRAY_SIZE(write_iarr), 0x8a, 0, F_D_OUT | FF_MEDIA_IO,
resp_write_dt0, write_iarr, /* WRITE(16) */
{16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
{0, 0x1b, 0, F_SSU_DELAY, resp_start_stop, NULL,/* START STOP UNIT */
{6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{ARRAY_SIZE(sa_in_16_iarr), 0x9e, 0x10, F_SA_LOW | F_D_IN,
resp_readcap16, sa_in_16_iarr, /* SA_IN(16), READ CAPACITY(16) */
{16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0x1, 0xc7} },
{0, 0x9f, 0x12, F_SA_LOW | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
NULL, {16, 0x12, 0xf9, 0x0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xc7} }, /* SA_OUT(16), WRITE SCAT(16) */
{ARRAY_SIZE(maint_in_iarr), 0xa3, 0xa, F_SA_LOW | F_D_IN,
resp_report_tgtpgs, /* MAINT IN, REPORT TARGET PORT GROUPS */
maint_in_iarr, {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff,
0xff, 0, 0xc7, 0, 0, 0, 0} },
/* 15 */
{0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{0, 0x2f, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, NULL, NULL, /* VERIFY(10) */
{10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7,
0, 0, 0, 0, 0, 0} },
{ARRAY_SIZE(vl_iarr), 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_MEDIA_IO,
resp_read_dt0, vl_iarr, /* VARIABLE LENGTH, READ(32) */
{32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x9, 0xfe, 0, 0xff, 0xff,
0xff, 0xff} },
{ARRAY_SIZE(reserve_iarr), 0x56, 0, F_D_OUT,
NULL, reserve_iarr, /* RESERVE(10) <no response function> */
{10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
0} },
{ARRAY_SIZE(release_iarr), 0x57, 0, F_D_OUT,
NULL, release_iarr, /* RELEASE(10) <no response function> */
{10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
0} },
/* 20 */
{0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */
{6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
{6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
{6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{0, 0x42, 0, F_D_OUT | FF_MEDIA_IO, resp_unmap, NULL, /* UNMAP */
{10, 0x1, 0, 0, 0, 0, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
/* 25 */
{0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
{10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
0, 0, 0, 0} }, /* WRITE_BUFFER */
{ARRAY_SIZE(write_same_iarr), 0x41, 0, F_D_OUT_MAYBE | FF_MEDIA_IO,
resp_write_same_10, write_same_iarr, /* WRITE SAME(10) */
{10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0,
0, 0, 0, 0, 0} },
{ARRAY_SIZE(sync_cache_iarr), 0x35, 0, F_SYNC_DELAY | F_M_ACCESS,
resp_sync_cache, sync_cache_iarr,
{10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
0, 0, 0, 0} }, /* SYNC_CACHE (10) */
{0, 0x89, 0, F_D_OUT | FF_MEDIA_IO, resp_comp_write, NULL,
{16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
0, 0xff, 0x3f, 0xc7} }, /* COMPARE AND WRITE */
/* 29 */
{0xff, 0, 0, 0, NULL, NULL, /* terminating element */
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
};
static int sdebug_add_host = DEF_NUM_HOST;
static int sdebug_ato = DEF_ATO;
static int sdebug_cdb_len = DEF_CDB_LEN;
static int sdebug_jdelay = DEF_JDELAY; /* if > 0 then unit is jiffies */
static int sdebug_dev_size_mb = DEF_DEV_SIZE_MB;
static int sdebug_dif = DEF_DIF;
static int sdebug_dix = DEF_DIX;
static int sdebug_dsense = DEF_D_SENSE;
static int sdebug_every_nth = DEF_EVERY_NTH;
static int sdebug_fake_rw = DEF_FAKE_RW;
static unsigned int sdebug_guard = DEF_GUARD;
static int sdebug_lowest_aligned = DEF_LOWEST_ALIGNED;
static int sdebug_max_luns = DEF_MAX_LUNS;
static int sdebug_max_queue = SDEBUG_CANQUEUE; /* per submit queue */
static unsigned int sdebug_medium_error_start = OPT_MEDIUM_ERR_ADDR;
static int sdebug_medium_error_count = OPT_MEDIUM_ERR_NUM;
static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
static int sdebug_ndelay = DEF_NDELAY; /* if > 0 then unit is nanoseconds */
static int sdebug_no_lun_0 = DEF_NO_LUN_0;
static int sdebug_no_uld;
static int sdebug_num_parts = DEF_NUM_PARTS;
static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */
static int sdebug_opt_blks = DEF_OPT_BLKS;
static int sdebug_opts = DEF_OPTS;
static int sdebug_physblk_exp = DEF_PHYSBLK_EXP;
static int sdebug_opt_xferlen_exp = DEF_OPT_XFERLEN_EXP;
static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */
static int sdebug_scsi_level = DEF_SCSI_LEVEL;
static int sdebug_sector_size = DEF_SECTOR_SIZE;
static int sdebug_virtual_gb = DEF_VIRTUAL_GB;
static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
static unsigned int sdebug_lbpu = DEF_LBPU;
static unsigned int sdebug_lbpws = DEF_LBPWS;
static unsigned int sdebug_lbpws10 = DEF_LBPWS10;
static unsigned int sdebug_lbprz = DEF_LBPRZ;
static unsigned int sdebug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
static unsigned int sdebug_unmap_granularity = DEF_UNMAP_GRANULARITY;
static unsigned int sdebug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
static unsigned int sdebug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
static unsigned int sdebug_write_same_length = DEF_WRITESAME_LENGTH;
static int sdebug_uuid_ctl = DEF_UUID_CTL;
static bool sdebug_removable = DEF_REMOVABLE;
static bool sdebug_clustering;
static bool sdebug_host_lock = DEF_HOST_LOCK;
static bool sdebug_strict = DEF_STRICT;
static bool sdebug_any_injecting_opt;
static bool sdebug_verbose;
static bool have_dif_prot;
static bool write_since_sync;
static bool sdebug_statistics = DEF_STATISTICS;
static bool sdebug_wp;
static unsigned int sdebug_store_sectors;
static sector_t sdebug_capacity; /* in sectors */
/* old BIOS stuff, kernel may get rid of them but some mode sense pages
may still need them */
static int sdebug_heads; /* heads per disk */
static int sdebug_cylinders_per; /* cylinders per surface */
static int sdebug_sectors_per; /* sectors per cylinder */
static LIST_HEAD(sdebug_host_list);
static DEFINE_SPINLOCK(sdebug_host_list_lock);
static unsigned char *fake_storep; /* ramdisk storage */
static struct t10_pi_tuple *dif_storep; /* protection info */
static void *map_storep; /* provisioning map */
static unsigned long map_size;
static int num_aborts;
static int num_dev_resets;
static int num_target_resets;
static int num_bus_resets;
static int num_host_resets;
static int dix_writes;
static int dix_reads;
static int dif_errors;
static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */
static struct sdebug_queue *sdebug_q_arr; /* ptr to array of submit queues */
static DEFINE_RWLOCK(atomic_rw);
static char sdebug_proc_name[] = MY_NAME;
static const char *my_name = MY_NAME;
static struct bus_type pseudo_lld_bus;
static struct device_driver sdebug_driverfs_driver = {
.name = sdebug_proc_name,
.bus = &pseudo_lld_bus,
};
static const int check_condition_result =
(DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
static const int illegal_condition_result =
(DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
static const int device_qfull_result =
(DID_OK << 16) | (COMMAND_COMPLETE << 8) | SAM_STAT_TASK_SET_FULL;
/* Only do the extra work involved in logical block provisioning if one or
* more of the lbpu, lbpws or lbpws10 parameters are given and we are doing
* real reads and writes (i.e. not skipping them for speed).
*/
static inline bool scsi_debug_lbp(void)
{
return 0 == sdebug_fake_rw &&
(sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10);
}
static void *lba2fake_store(unsigned long long lba)
{
lba = do_div(lba, sdebug_store_sectors);
return fake_storep + lba * sdebug_sector_size;
}
static struct t10_pi_tuple *dif_store(sector_t sector)
{
sector = sector_div(sector, sdebug_store_sectors);
return dif_storep + sector;
}
static void sdebug_max_tgts_luns(void)
{
struct sdebug_host_info *sdbg_host;
struct Scsi_Host *hpnt;
spin_lock(&sdebug_host_list_lock);
list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
hpnt = sdbg_host->shost;
if ((hpnt->this_id >= 0) &&
(sdebug_num_tgts > hpnt->this_id))
hpnt->max_id = sdebug_num_tgts + 1;
else
hpnt->max_id = sdebug_num_tgts;
/* sdebug_max_luns; */
hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
}
spin_unlock(&sdebug_host_list_lock);
}
enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
/* Set in_bit to -1 to indicate no bit position of invalid field */
static void mk_sense_invalid_fld(struct scsi_cmnd *scp,
enum sdeb_cmd_data c_d,
int in_byte, int in_bit)
{
unsigned char *sbuff;
u8 sks[4];
int sl, asc;
sbuff = scp->sense_buffer;
if (!sbuff) {
sdev_printk(KERN_ERR, scp->device,
"%s: sense_buffer is NULL\n", __func__);
return;
}
asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
scsi_build_sense_buffer(sdebug_dsense, sbuff, ILLEGAL_REQUEST, asc, 0);
memset(sks, 0, sizeof(sks));
sks[0] = 0x80;
if (c_d)
sks[0] |= 0x40;
if (in_bit >= 0) {
sks[0] |= 0x8;
sks[0] |= 0x7 & in_bit;
}
put_unaligned_be16(in_byte, sks + 1);
if (sdebug_dsense) {
sl = sbuff[7] + 8;
sbuff[7] = sl;
sbuff[sl] = 0x2;
sbuff[sl + 1] = 0x6;
memcpy(sbuff + sl + 4, sks, 3);
} else
memcpy(sbuff + 15, sks, 3);
if (sdebug_verbose)
sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
"]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
}
static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
{
unsigned char *sbuff;
sbuff = scp->sense_buffer;
if (!sbuff) {
sdev_printk(KERN_ERR, scp->device,
"%s: sense_buffer is NULL\n", __func__);
return;
}
memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
scsi_build_sense_buffer(sdebug_dsense, sbuff, key, asc, asq);
if (sdebug_verbose)
sdev_printk(KERN_INFO, scp->device,
"%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
my_name, key, asc, asq);
}
static void mk_sense_invalid_opcode(struct scsi_cmnd *scp)
{
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
}
static int scsi_debug_ioctl(struct scsi_device *dev, unsigned int cmd,
void __user *arg)
{
if (sdebug_verbose) {
if (0x1261 == cmd)
sdev_printk(KERN_INFO, dev,
"%s: BLKFLSBUF [0x1261]\n", __func__);
else if (0x5331 == cmd)
sdev_printk(KERN_INFO, dev,
"%s: CDROM_GET_CAPABILITY [0x5331]\n",
__func__);
else
sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
__func__, cmd);
}
return -EINVAL;
/* return -ENOTTY; // correct return but upsets fdisk */
}
static void config_cdb_len(struct scsi_device *sdev)
{
switch (sdebug_cdb_len) {
case 6: /* suggest 6 byte READ, WRITE and MODE SENSE/SELECT */
sdev->use_10_for_rw = false;
sdev->use_16_for_rw = false;
sdev->use_10_for_ms = false;
break;
case 10: /* suggest 10 byte RWs and 6 byte MODE SENSE/SELECT */
sdev->use_10_for_rw = true;
sdev->use_16_for_rw = false;
sdev->use_10_for_ms = false;
break;
case 12: /* suggest 10 byte RWs and 10 byte MODE SENSE/SELECT */
sdev->use_10_for_rw = true;
sdev->use_16_for_rw = false;
sdev->use_10_for_ms = true;
break;
case 16:
sdev->use_10_for_rw = false;
sdev->use_16_for_rw = true;
sdev->use_10_for_ms = true;
break;
case 32: /* No knobs to suggest this so same as 16 for now */
sdev->use_10_for_rw = false;
sdev->use_16_for_rw = true;
sdev->use_10_for_ms = true;
break;
default:
pr_warn("unexpected cdb_len=%d, force to 10\n",
sdebug_cdb_len);
sdev->use_10_for_rw = true;
sdev->use_16_for_rw = false;
sdev->use_10_for_ms = false;
sdebug_cdb_len = 10;
break;
}
}
static void all_config_cdb_len(void)
{
struct sdebug_host_info *sdbg_host;
struct Scsi_Host *shost;
struct scsi_device *sdev;
spin_lock(&sdebug_host_list_lock);
list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
shost = sdbg_host->shost;
shost_for_each_device(sdev, shost) {
config_cdb_len(sdev);
}
}
spin_unlock(&sdebug_host_list_lock);
}
static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
{
struct sdebug_host_info *sdhp;
struct sdebug_dev_info *dp;
spin_lock(&sdebug_host_list_lock);
list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
if ((devip->sdbg_host == dp->sdbg_host) &&
(devip->target == dp->target))
clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
}
}
spin_unlock(&sdebug_host_list_lock);
}
static int make_ua(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
{
int k;
k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
if (k != SDEBUG_NUM_UAS) {
const char *cp = NULL;
switch (k) {
case SDEBUG_UA_POR:
mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
POWER_ON_RESET_ASCQ);
if (sdebug_verbose)
cp = "power on reset";
break;
case SDEBUG_UA_BUS_RESET:
mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
BUS_RESET_ASCQ);
if (sdebug_verbose)
cp = "bus reset";
break;
case SDEBUG_UA_MODE_CHANGED:
mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
MODE_CHANGED_ASCQ);
if (sdebug_verbose)
cp = "mode parameters changed";
break;
case SDEBUG_UA_CAPACITY_CHANGED:
mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
CAPACITY_CHANGED_ASCQ);
if (sdebug_verbose)
cp = "capacity data changed";
break;
case SDEBUG_UA_MICROCODE_CHANGED:
mk_sense_buffer(scp, UNIT_ATTENTION,
TARGET_CHANGED_ASC,
MICROCODE_CHANGED_ASCQ);
if (sdebug_verbose)
cp = "microcode has been changed";
break;
case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
mk_sense_buffer(scp, UNIT_ATTENTION,
TARGET_CHANGED_ASC,
MICROCODE_CHANGED_WO_RESET_ASCQ);
if (sdebug_verbose)
cp = "microcode has been changed without reset";
break;
case SDEBUG_UA_LUNS_CHANGED:
/*
* SPC-3 behavior is to report a UNIT ATTENTION with
* ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN
* on the target, until a REPORT LUNS command is
* received. SPC-4 behavior is to report it only once.
* NOTE: sdebug_scsi_level does not use the same
* values as struct scsi_device->scsi_level.
*/
if (sdebug_scsi_level >= 6) /* SPC-4 and above */
clear_luns_changed_on_target(devip);
mk_sense_buffer(scp, UNIT_ATTENTION,
TARGET_CHANGED_ASC,
LUNS_CHANGED_ASCQ);
if (sdebug_verbose)
cp = "reported luns data has changed";
break;
default:
pr_warn("unexpected unit attention code=%d\n", k);
if (sdebug_verbose)
cp = "unknown";
break;
}
clear_bit(k, devip->uas_bm);
if (sdebug_verbose)
sdev_printk(KERN_INFO, scp->device,
"%s reports: Unit attention: %s\n",
my_name, cp);
return check_condition_result;
}
return 0;
}
/* Build SCSI "data-in" buffer. Returns 0 if ok else (DID_ERROR << 16). */
static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
int arr_len)
{
int act_len;
struct scsi_data_buffer *sdb = &scp->sdb;
if (!sdb->length)
return 0;
if (scp->sc_data_direction != DMA_FROM_DEVICE)
return DID_ERROR << 16;
act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
arr, arr_len);
scsi_set_resid(scp, scsi_bufflen(scp) - act_len);
return 0;
}
/* Partial build of SCSI "data-in" buffer. Returns 0 if ok else
* (DID_ERROR << 16). Can write to offset in data-in buffer. If multiple
* calls, not required to write in ascending offset order. Assumes resid
* set to scsi_bufflen() prior to any calls.
*/
static int p_fill_from_dev_buffer(struct scsi_cmnd *scp, const void *arr,
int arr_len, unsigned int off_dst)
{
int act_len, n;
struct scsi_data_buffer *sdb = &scp->sdb;
off_t skip = off_dst;
if (sdb->length <= off_dst)
return 0;
if (scp->sc_data_direction != DMA_FROM_DEVICE)
return DID_ERROR << 16;
act_len = sg_pcopy_from_buffer(sdb->table.sgl, sdb->table.nents,
arr, arr_len, skip);
pr_debug("%s: off_dst=%u, scsi_bufflen=%u, act_len=%u, resid=%d\n",
__func__, off_dst, scsi_bufflen(scp), act_len,
scsi_get_resid(scp));
n = (int)scsi_bufflen(scp) - ((int)off_dst + act_len);
scsi_set_resid(scp, min(scsi_get_resid(scp), n));
return 0;
}
/* Fetches from SCSI "data-out" buffer. Returns number of bytes fetched into
* 'arr' or -1 if error.
*/
static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
int arr_len)
{
if (!scsi_bufflen(scp))
return 0;
if (scp->sc_data_direction != DMA_TO_DEVICE)
return -1;
return scsi_sg_copy_to_buffer(scp, arr, arr_len);
}
static char sdebug_inq_vendor_id[9] = "Linux ";
static char sdebug_inq_product_id[17] = "scsi_debug ";
static char sdebug_inq_product_rev[5] = SDEBUG_VERSION;
/* Use some locally assigned NAAs for SAS addresses. */
static const u64 naa3_comp_a = 0x3222222000000000ULL;
static const u64 naa3_comp_b = 0x3333333000000000ULL;
static const u64 naa3_comp_c = 0x3111111000000000ULL;
/* Device identification VPD page. Returns number of bytes placed in arr */
static int inquiry_vpd_83(unsigned char *arr, int port_group_id,
int target_dev_id, int dev_id_num,
const char *dev_id_str, int dev_id_str_len,
const uuid_t *lu_name)
{
int num, port_a;
char b[32];
port_a = target_dev_id + 1;
/* T10 vendor identifier field format (faked) */
arr[0] = 0x2; /* ASCII */
arr[1] = 0x1;
arr[2] = 0x0;
memcpy(&arr[4], sdebug_inq_vendor_id, 8);
memcpy(&arr[12], sdebug_inq_product_id, 16);
memcpy(&arr[28], dev_id_str, dev_id_str_len);
num = 8 + 16 + dev_id_str_len;
arr[3] = num;
num += 4;
if (dev_id_num >= 0) {
if (sdebug_uuid_ctl) {
/* Locally assigned UUID */
arr[num++] = 0x1; /* binary (not necessarily sas) */
arr[num++] = 0xa; /* PIV=0, lu, naa */
arr[num++] = 0x0;
arr[num++] = 0x12;
arr[num++] = 0x10; /* uuid type=1, locally assigned */
arr[num++] = 0x0;
memcpy(arr + num, lu_name, 16);
num += 16;
} else {
/* NAA-3, Logical unit identifier (binary) */
arr[num++] = 0x1; /* binary (not necessarily sas) */
arr[num++] = 0x3; /* PIV=0, lu, naa */
arr[num++] = 0x0;
arr[num++] = 0x8;
put_unaligned_be64(naa3_comp_b + dev_id_num, arr + num);
num += 8;
}
/* Target relative port number */
arr[num++] = 0x61; /* proto=sas, binary */
arr[num++] = 0x94; /* PIV=1, target port, rel port */
arr[num++] = 0x0; /* reserved */
arr[num++] = 0x4; /* length */
arr[num++] = 0x0; /* reserved */
arr[num++] = 0x0; /* reserved */
arr[num++] = 0x0;
arr[num++] = 0x1; /* relative port A */
}
/* NAA-3, Target port identifier */
arr[num++] = 0x61; /* proto=sas, binary */
arr[num++] = 0x93; /* piv=1, target port, naa */
arr[num++] = 0x0;
arr[num++] = 0x8;
put_unaligned_be64(naa3_comp_a + port_a, arr + num);
num += 8;
/* NAA-3, Target port group identifier */
arr[num++] = 0x61; /* proto=sas, binary */
arr[num++] = 0x95; /* piv=1, target port group id */
arr[num++] = 0x0;
arr[num++] = 0x4;
arr[num++] = 0;
arr[num++] = 0;
put_unaligned_be16(port_group_id, arr + num);
num += 2;
/* NAA-3, Target device identifier */
arr[num++] = 0x61; /* proto=sas, binary */
arr[num++] = 0xa3; /* piv=1, target device, naa */
arr[num++] = 0x0;
arr[num++] = 0x8;
put_unaligned_be64(naa3_comp_a + target_dev_id, arr + num);
num += 8;
/* SCSI name string: Target device identifier */
arr[num++] = 0x63; /* proto=sas, UTF-8 */
arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
arr[num++] = 0x0;
arr[num++] = 24;
memcpy(arr + num, "naa.32222220", 12);
num += 12;
snprintf(b, sizeof(b), "%08X", target_dev_id);
memcpy(arr + num, b, 8);
num += 8;
memset(arr + num, 0, 4);
num += 4;
return num;
}
static unsigned char vpd84_data[] = {
/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
0x22,0x22,0x22,0x0,0xbb,0x1,
0x22,0x22,0x22,0x0,0xbb,0x2,
};
/* Software interface identification VPD page */
static int inquiry_vpd_84(unsigned char *arr)
{
memcpy(arr, vpd84_data, sizeof(vpd84_data));
return sizeof(vpd84_data);
}
/* Management network addresses VPD page */
static int inquiry_vpd_85(unsigned char *arr)
{
int num = 0;
const char *na1 = "https://www.kernel.org/config";
const char *na2 = "http://www.kernel.org/log";
int plen, olen;
arr[num++] = 0x1; /* lu, storage config */
arr[num++] = 0x0; /* reserved */
arr[num++] = 0x0;
olen = strlen(na1);
plen = olen + 1;
if (plen % 4)
plen = ((plen / 4) + 1) * 4;
arr[num++] = plen; /* length, null termianted, padded */
memcpy(arr + num, na1, olen);
memset(arr + num + olen, 0, plen - olen);
num += plen;
arr[num++] = 0x4; /* lu, logging */
arr[num++] = 0x0; /* reserved */
arr[num++] = 0x0;
olen = strlen(na2);
plen = olen + 1;
if (plen % 4)
plen = ((plen / 4) + 1) * 4;
arr[num++] = plen; /* length, null terminated, padded */
memcpy(arr + num, na2, olen);
memset(arr + num + olen, 0, plen - olen);
num += plen;
return num;
}
/* SCSI ports VPD page */
static int inquiry_vpd_88(unsigned char *arr, int target_dev_id)
{
int num = 0;
int port_a, port_b;
port_a = target_dev_id + 1;
port_b = port_a + 1;
arr[num++] = 0x0; /* reserved */
arr[num++] = 0x0; /* reserved */
arr[num++] = 0x0;
arr[num++] = 0x1; /* relative port 1 (primary) */
memset(arr + num, 0, 6);
num += 6;
arr[num++] = 0x0;
arr[num++] = 12; /* length tp descriptor */
/* naa-5 target port identifier (A) */
arr[num++] = 0x61; /* proto=sas, binary */
arr[num++] = 0x93; /* PIV=1, target port, NAA */
arr[num++] = 0x0; /* reserved */
arr[num++] = 0x8; /* length */
put_unaligned_be64(naa3_comp_a + port_a, arr + num);
num += 8;
arr[num++] = 0x0; /* reserved */
arr[num++] = 0x0; /* reserved */
arr[num++] = 0x0;
arr[num++] = 0x2; /* relative port 2 (secondary) */
memset(arr + num, 0, 6);
num += 6;
arr[num++] = 0x0;
arr[num++] = 12; /* length tp descriptor */
/* naa-5 target port identifier (B) */
arr[num++] = 0x61; /* proto=sas, binary */
arr[num++] = 0x93; /* PIV=1, target port, NAA */
arr[num++] = 0x0; /* reserved */
arr[num++] = 0x8; /* length */
put_unaligned_be64(naa3_comp_a + port_b, arr + num);
num += 8;
return num;
}
static unsigned char vpd89_data[] = {
/* from 4th byte */ 0,0,0,0,
'l','i','n','u','x',' ',' ',' ',
'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
'1','2','3','4',
0x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
0xec,0,0,0,
0x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
0,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
0x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
0x53,0x41,
0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
0x20,0x20,
0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
0x10,0x80,
0,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
0x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
0x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
0x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
0x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
0,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
0,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
0xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
0,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
};
/* ATA Information VPD page */
static int inquiry_vpd_89(unsigned char *arr)
{
memcpy(arr, vpd89_data, sizeof(vpd89_data));
return sizeof(vpd89_data);
}
static unsigned char vpdb0_data[] = {
/* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
};
/* Block limits VPD page (SBC-3) */
static int inquiry_vpd_b0(unsigned char *arr)
{
unsigned int gran;
memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
/* Optimal transfer length granularity */
if (sdebug_opt_xferlen_exp != 0 &&
sdebug_physblk_exp < sdebug_opt_xferlen_exp)
gran = 1 << sdebug_opt_xferlen_exp;
else
gran = 1 << sdebug_physblk_exp;
put_unaligned_be16(gran, arr + 2);
/* Maximum Transfer Length */
if (sdebug_store_sectors > 0x400)
put_unaligned_be32(sdebug_store_sectors, arr + 4);
/* Optimal Transfer Length */
put_unaligned_be32(sdebug_opt_blks, &arr[8]);
if (sdebug_lbpu) {
/* Maximum Unmap LBA Count */
put_unaligned_be32(sdebug_unmap_max_blocks, &arr[16]);
/* Maximum Unmap Block Descriptor Count */
put_unaligned_be32(sdebug_unmap_max_desc, &arr[20]);
}
/* Unmap Granularity Alignment */
if (sdebug_unmap_alignment) {
put_unaligned_be32(sdebug_unmap_alignment, &arr[28]);
arr[28] |= 0x80; /* UGAVALID */
}
/* Optimal Unmap Granularity */
put_unaligned_be32(sdebug_unmap_granularity, &arr[24]);
/* Maximum WRITE SAME Length */
put_unaligned_be64(sdebug_write_same_length, &arr[32]);
return 0x3c; /* Mandatory page length for Logical Block Provisioning */
return sizeof(vpdb0_data);
}
/* Block device characteristics VPD page (SBC-3) */
static int inquiry_vpd_b1(unsigned char *arr)
{
memset(arr, 0, 0x3c);
arr[0] = 0;
arr[1] = 1; /* non rotating medium (e.g. solid state) */
arr[2] = 0;
arr[3] = 5; /* less than 1.8" */
return 0x3c;
}
/* Logical block provisioning VPD page (SBC-4) */
static int inquiry_vpd_b2(unsigned char *arr)
{
memset(arr, 0, 0x4);
arr[0] = 0; /* threshold exponent */
if (sdebug_lbpu)
arr[1] = 1 << 7;
if (sdebug_lbpws)
arr[1] |= 1 << 6;
if (sdebug_lbpws10)
arr[1] |= 1 << 5;
if (sdebug_lbprz && scsi_debug_lbp())
arr[1] |= (sdebug_lbprz & 0x7) << 2; /* sbc4r07 and later */
/* anc_sup=0; dp=0 (no provisioning group descriptor) */
/* minimum_percentage=0; provisioning_type=0 (unknown) */
/* threshold_percentage=0 */
return 0x4;
}
#define SDEBUG_LONG_INQ_SZ 96
#define SDEBUG_MAX_INQ_ARR_SZ 584
static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
{
unsigned char pq_pdt;
unsigned char *arr;
unsigned char *cmd = scp->cmnd;
int alloc_len, n, ret;
bool have_wlun, is_disk;
alloc_len = get_unaligned_be16(cmd + 3);
arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
if (! arr)
return DID_REQUEUE << 16;
is_disk = (sdebug_ptype == TYPE_DISK);
have_wlun = scsi_is_wlun(scp->device->lun);
if (have_wlun)
pq_pdt = TYPE_WLUN; /* present, wlun */
else if (sdebug_no_lun_0 && (devip->lun == SDEBUG_LUN_0_VAL))
pq_pdt = 0x7f; /* not present, PQ=3, PDT=0x1f */
else
pq_pdt = (sdebug_ptype & 0x1f);
arr[0] = pq_pdt;
if (0x2 & cmd[1]) { /* CMDDT bit set */
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
kfree(arr);
return check_condition_result;
} else if (0x1 & cmd[1]) { /* EVPD bit set */
int lu_id_num, port_group_id, target_dev_id, len;
char lu_id_str[6];
int host_no = devip->sdbg_host->shost->host_no;
port_group_id = (((host_no + 1) & 0x7f) << 8) +
(devip->channel & 0x7f);
if (sdebug_vpd_use_hostno == 0)
host_no = 0;
lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
(devip->target * 1000) + devip->lun);
target_dev_id = ((host_no + 1) * 2000) +
(devip->target * 1000) - 3;
len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
if (0 == cmd[2]) { /* supported vital product data pages */
arr[1] = cmd[2]; /*sanity */
n = 4;
arr[n++] = 0x0; /* this page */
arr[n++] = 0x80; /* unit serial number */
arr[n++] = 0x83; /* device identification */
arr[n++] = 0x84; /* software interface ident. */
arr[n++] = 0x85; /* management network addresses */
arr[n++] = 0x86; /* extended inquiry */
arr[n++] = 0x87; /* mode page policy */
arr[n++] = 0x88; /* SCSI ports */
if (is_disk) { /* SBC only */
arr[n++] = 0x89; /* ATA information */
arr[n++] = 0xb0; /* Block limits */
arr[n++] = 0xb1; /* Block characteristics */
arr[n++] = 0xb2; /* Logical Block Prov */
}
arr[3] = n - 4; /* number of supported VPD pages */
} else if (0x80 == cmd[2]) { /* unit serial number */
arr[1] = cmd[2]; /*sanity */
arr[3] = len;
memcpy(&arr[4], lu_id_str, len);
} else if (0x83 == cmd[2]) { /* device identification */
arr[1] = cmd[2]; /*sanity */
arr[3] = inquiry_vpd_83(&arr[4], port_group_id,
target_dev_id, lu_id_num,
lu_id_str, len,
&devip->lu_name);
} else if (0x84 == cmd[2]) { /* Software interface ident. */
arr[1] = cmd[2]; /*sanity */
arr[3] = inquiry_vpd_84(&arr[4]);
} else if (0x85 == cmd[2]) { /* Management network addresses */
arr[1] = cmd[2]; /*sanity */
arr[3] = inquiry_vpd_85(&arr[4]);
} else if (0x86 == cmd[2]) { /* extended inquiry */
arr[1] = cmd[2]; /*sanity */
arr[3] = 0x3c; /* number of following entries */
if (sdebug_dif == T10_PI_TYPE3_PROTECTION)
arr[4] = 0x4; /* SPT: GRD_CHK:1 */
else if (have_dif_prot)
arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
else
arr[4] = 0x0; /* no protection stuff */
arr[5] = 0x7; /* head of q, ordered + simple q's */
} else if (0x87 == cmd[2]) { /* mode page policy */
arr[1] = cmd[2]; /*sanity */
arr[3] = 0x8; /* number of following entries */
arr[4] = 0x2; /* disconnect-reconnect mp */
arr[6] = 0x80; /* mlus, shared */
arr[8] = 0x18; /* protocol specific lu */
arr[10] = 0x82; /* mlus, per initiator port */
} else if (0x88 == cmd[2]) { /* SCSI Ports */
arr[1] = cmd[2]; /*sanity */
arr[3] = inquiry_vpd_88(&arr[4], target_dev_id);
} else if (is_disk && 0x89 == cmd[2]) { /* ATA information */
arr[1] = cmd[2]; /*sanity */
n = inquiry_vpd_89(&arr[4]);
put_unaligned_be16(n, arr + 2);
} else if (is_disk && 0xb0 == cmd[2]) { /* Block limits */
arr[1] = cmd[2]; /*sanity */
arr[3] = inquiry_vpd_b0(&arr[4]);
} else if (is_disk && 0xb1 == cmd[2]) { /* Block char. */
arr[1] = cmd[2]; /*sanity */
arr[3] = inquiry_vpd_b1(&arr[4]);
} else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */
arr[1] = cmd[2]; /*sanity */
arr[3] = inquiry_vpd_b2(&arr[4]);
} else {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
kfree(arr);
return check_condition_result;
}
len = min(get_unaligned_be16(arr + 2) + 4, alloc_len);
ret = fill_from_dev_buffer(scp, arr,
min(len, SDEBUG_MAX_INQ_ARR_SZ));
kfree(arr);
return ret;
}
/* drops through here for a standard inquiry */
arr[1] = sdebug_removable ? 0x80 : 0; /* Removable disk */
arr[2] = sdebug_scsi_level;
arr[3] = 2; /* response_data_format==2 */
arr[4] = SDEBUG_LONG_INQ_SZ - 5;
arr[5] = (int)have_dif_prot; /* PROTECT bit */
if (sdebug_vpd_use_hostno == 0)
arr[5] |= 0x10; /* claim: implicit TPGS */
arr[6] = 0x10; /* claim: MultiP */
/* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
arr[7] = 0xa; /* claim: LINKED + CMDQUE */
memcpy(&arr[8], sdebug_inq_vendor_id, 8);
memcpy(&arr[16], sdebug_inq_product_id, 16);
memcpy(&arr[32], sdebug_inq_product_rev, 4);
/* Use Vendor Specific area to place driver date in ASCII hex */
memcpy(&arr[36], sdebug_version_date, 8);
/* version descriptors (2 bytes each) follow */
put_unaligned_be16(0xc0, arr + 58); /* SAM-6 no version claimed */
put_unaligned_be16(0x5c0, arr + 60); /* SPC-5 no version claimed */
n = 62;
if (is_disk) { /* SBC-4 no version claimed */
put_unaligned_be16(0x600, arr + n);
n += 2;
} else if (sdebug_ptype == TYPE_TAPE) { /* SSC-4 rev 3 */
put_unaligned_be16(0x525, arr + n);
n += 2;
}
put_unaligned_be16(0x2100, arr + n); /* SPL-4 no version claimed */
ret = fill_from_dev_buffer(scp, arr,
min(alloc_len, SDEBUG_LONG_INQ_SZ));
kfree(arr);
return ret;
}
static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
0, 0, 0x0, 0x0};
static int resp_requests(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
unsigned char *sbuff;
unsigned char *cmd = scp->cmnd;
unsigned char arr[SCSI_SENSE_BUFFERSIZE];
bool dsense;
int len = 18;
memset(arr, 0, sizeof(arr));
dsense = !!(cmd[1] & 1);
sbuff = scp->sense_buffer;
if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
if (dsense) {
arr[0] = 0x72;
arr[1] = 0x0; /* NO_SENSE in sense_key */
arr[2] = THRESHOLD_EXCEEDED;
arr[3] = 0xff; /* TEST set and MRIE==6 */
len = 8;
} else {
arr[0] = 0x70;
arr[2] = 0x0; /* NO_SENSE in sense_key */
arr[7] = 0xa; /* 18 byte sense buffer */
arr[12] = THRESHOLD_EXCEEDED;
arr[13] = 0xff; /* TEST set and MRIE==6 */
}
} else {
memcpy(arr, sbuff, SCSI_SENSE_BUFFERSIZE);
if (arr[0] >= 0x70 && dsense == sdebug_dsense)
; /* have sense and formats match */
else if (arr[0] <= 0x70) {
if (dsense) {
memset(arr, 0, 8);
arr[0] = 0x72;
len = 8;
} else {
memset(arr, 0, 18);
arr[0] = 0x70;
arr[7] = 0xa;
}
} else if (dsense) {
memset(arr, 0, 8);
arr[0] = 0x72;
arr[1] = sbuff[2]; /* sense key */
arr[2] = sbuff[12]; /* asc */
arr[3] = sbuff[13]; /* ascq */
len = 8;
} else {
memset(arr, 0, 18);
arr[0] = 0x70;
arr[2] = sbuff[1];
arr[7] = 0xa;
arr[12] = sbuff[1];
arr[13] = sbuff[3];
}
}
mk_sense_buffer(scp, 0, NO_ADDITIONAL_SENSE, 0);
return fill_from_dev_buffer(scp, arr, len);
}
static int resp_start_stop(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
unsigned char *cmd = scp->cmnd;
int power_cond, stop;
bool changing;
power_cond = (cmd[4] & 0xf0) >> 4;
if (power_cond) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
return check_condition_result;
}
stop = !(cmd[4] & 1);
changing = atomic_read(&devip->stopped) == !stop;
atomic_xchg(&devip->stopped, stop);
if (!changing || cmd[1] & 0x1) /* state unchanged or IMMED set */
return SDEG_RES_IMMED_MASK;
else
return 0;
}
static sector_t get_sdebug_capacity(void)
{
static const unsigned int gibibyte = 1073741824;
if (sdebug_virtual_gb > 0)
return (sector_t)sdebug_virtual_gb *
(gibibyte / sdebug_sector_size);
else
return sdebug_store_sectors;
}
#define SDEBUG_READCAP_ARR_SZ 8
static int resp_readcap(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
unsigned char arr[SDEBUG_READCAP_ARR_SZ];
unsigned int capac;
/* following just in case virtual_gb changed */
sdebug_capacity = get_sdebug_capacity();
memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
if (sdebug_capacity < 0xffffffff) {
capac = (unsigned int)sdebug_capacity - 1;
put_unaligned_be32(capac, arr + 0);
} else
put_unaligned_be32(0xffffffff, arr + 0);
put_unaligned_be16(sdebug_sector_size, arr + 6);
return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
}
#define SDEBUG_READCAP16_ARR_SZ 32
static int resp_readcap16(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
unsigned char *cmd = scp->cmnd;
unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
int alloc_len;
alloc_len = get_unaligned_be32(cmd + 10);
/* following just in case virtual_gb changed */
sdebug_capacity = get_sdebug_capacity();
memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
put_unaligned_be64((u64)(sdebug_capacity - 1), arr + 0);
put_unaligned_be32(sdebug_sector_size, arr + 8);
arr[13] = sdebug_physblk_exp & 0xf;
arr[14] = (sdebug_lowest_aligned >> 8) & 0x3f;
if (scsi_debug_lbp()) {
arr[14] |= 0x80; /* LBPME */
/* from sbc4r07, this LBPRZ field is 1 bit, but the LBPRZ in
* the LB Provisioning VPD page is 3 bits. Note that lbprz=2
* in the wider field maps to 0 in this field.
*/
if (sdebug_lbprz & 1) /* precisely what the draft requires */
arr[14] |= 0x40;
}
arr[15] = sdebug_lowest_aligned & 0xff;
if (have_dif_prot) {
arr[12] = (sdebug_dif - 1) << 1; /* P_TYPE */
arr[12] |= 1; /* PROT_EN */
}
return fill_from_dev_buffer(scp, arr,
min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
}
#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
static int resp_report_tgtpgs(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
unsigned char *cmd = scp->cmnd;
unsigned char *arr;
int host_no = devip->sdbg_host->shost->host_no;
int n, ret, alen, rlen;
int port_group_a, port_group_b, port_a, port_b;
alen = get_unaligned_be32(cmd + 6);
arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
if (! arr)
return DID_REQUEUE << 16;
/*
* EVPD page 0x88 states we have two ports, one
* real and a fake port with no device connected.
* So we create two port groups with one port each
* and set the group with port B to unavailable.
*/
port_a = 0x1; /* relative port A */
port_b = 0x2; /* relative port B */
port_group_a = (((host_no + 1) & 0x7f) << 8) +
(devip->channel & 0x7f);
port_group_b = (((host_no + 1) & 0x7f) << 8) +
(devip->channel & 0x7f) + 0x80;
/*
* The asymmetric access state is cycled according to the host_id.
*/
n = 4;
if (sdebug_vpd_use_hostno == 0) {
arr[n++] = host_no % 3; /* Asymm access state */
arr[n++] = 0x0F; /* claim: all states are supported */
} else {
arr[n++] = 0x0; /* Active/Optimized path */
arr[n++] = 0x01; /* only support active/optimized paths */
}
put_unaligned_be16(port_group_a, arr + n);
n += 2;
arr[n++] = 0; /* Reserved */
arr[n++] = 0; /* Status code */
arr[n++] = 0; /* Vendor unique */
arr[n++] = 0x1; /* One port per group */
arr[n++] = 0; /* Reserved */
arr[n++] = 0; /* Reserved */
put_unaligned_be16(port_a, arr + n);
n += 2;
arr[n++] = 3; /* Port unavailable */
arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
put_unaligned_be16(port_group_b, arr + n);
n += 2;
arr[n++] = 0; /* Reserved */
arr[n++] = 0; /* Status code */
arr[n++] = 0; /* Vendor unique */
arr[n++] = 0x1; /* One port per group */
arr[n++] = 0; /* Reserved */
arr[n++] = 0; /* Reserved */
put_unaligned_be16(port_b, arr + n);
n += 2;
rlen = n - 4;
put_unaligned_be32(rlen, arr + 0);
/*
* Return the smallest value of either
* - The allocated length
* - The constructed command length
* - The maximum array size
*/
rlen = min(alen,n);
ret = fill_from_dev_buffer(scp, arr,
min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
kfree(arr);
return ret;
}
static int resp_rsup_opcodes(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
bool rctd;
u8 reporting_opts, req_opcode, sdeb_i, supp;
u16 req_sa, u;
u32 alloc_len, a_len;
int k, offset, len, errsts, count, bump, na;
const struct opcode_info_t *oip;
const struct opcode_info_t *r_oip;
u8 *arr;
u8 *cmd = scp->cmnd;
rctd = !!(cmd[2] & 0x80);
reporting_opts = cmd[2] & 0x7;
req_opcode = cmd[3];
req_sa = get_unaligned_be16(cmd + 4);
alloc_len = get_unaligned_be32(cmd + 6);
if (alloc_len < 4 || alloc_len > 0xffff) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
return check_condition_result;
}
if (alloc_len > 8192)
a_len = 8192;
else
a_len = alloc_len;
arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
if (NULL == arr) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
INSUFF_RES_ASCQ);
return check_condition_result;
}
switch (reporting_opts) {
case 0: /* all commands */
/* count number of commands */
for (count = 0, oip = opcode_info_arr;
oip->num_attached != 0xff; ++oip) {
if (F_INV_OP & oip->flags)
continue;
count += (oip->num_attached + 1);
}
bump = rctd ? 20 : 8;
put_unaligned_be32(count * bump, arr);
for (offset = 4, oip = opcode_info_arr;
oip->num_attached != 0xff && offset < a_len; ++oip) {
if (F_INV_OP & oip->flags)
continue;
na = oip->num_attached;
arr[offset] = oip->opcode;
put_unaligned_be16(oip->sa, arr + offset + 2);
if (rctd)
arr[offset + 5] |= 0x2;
if (FF_SA & oip->flags)
arr[offset + 5] |= 0x1;
put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
if (rctd)
put_unaligned_be16(0xa, arr + offset + 8);
r_oip = oip;
for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
if (F_INV_OP & oip->flags)
continue;
offset += bump;
arr[offset] = oip->opcode;
put_unaligned_be16(oip->sa, arr + offset + 2);
if (rctd)
arr[offset + 5] |= 0x2;
if (FF_SA & oip->flags)
arr[offset + 5] |= 0x1;
put_unaligned_be16(oip->len_mask[0],
arr + offset + 6);
if (rctd)
put_unaligned_be16(0xa,
arr + offset + 8);
}
oip = r_oip;
offset += bump;
}
break;
case 1: /* one command: opcode only */
case 2: /* one command: opcode plus service action */
case 3: /* one command: if sa==0 then opcode only else opcode+sa */
sdeb_i = opcode_ind_arr[req_opcode];
oip = &opcode_info_arr[sdeb_i];
if (F_INV_OP & oip->flags) {
supp = 1;
offset = 4;
} else {
if (1 == reporting_opts) {
if (FF_SA & oip->flags) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB,
2, 2);
kfree(arr);
return check_condition_result;
}
req_sa = 0;
} else if (2 == reporting_opts &&
0 == (FF_SA & oip->flags)) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
kfree(arr); /* point at requested sa */
return check_condition_result;
}
if (0 == (FF_SA & oip->flags) &&
req_opcode == oip->opcode)
supp = 3;
else if (0 == (FF_SA & oip->flags)) {
na = oip->num_attached;
for (k = 0, oip = oip->arrp; k < na;
++k, ++oip) {
if (req_opcode == oip->opcode)
break;
}
supp = (k >= na) ? 1 : 3;
} else if (req_sa != oip->sa) {
na = oip->num_attached;
for (k = 0, oip = oip->arrp; k < na;
++k, ++oip) {
if (req_sa == oip->sa)
break;
}
supp = (k >= na) ? 1 : 3;
} else
supp = 3;
if (3 == supp) {
u = oip->len_mask[0];
put_unaligned_be16(u, arr + 2);
arr[4] = oip->opcode;
for (k = 1; k < u; ++k)
arr[4 + k] = (k < 16) ?
oip->len_mask[k] : 0xff;
offset = 4 + u;
} else
offset = 4;
}
arr[1] = (rctd ? 0x80 : 0) | supp;
if (rctd) {
put_unaligned_be16(0xa, arr + offset);
offset += 12;
}
break;
default:
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
kfree(arr);
return check_condition_result;
}
offset = (offset < a_len) ? offset : a_len;
len = (offset < alloc_len) ? offset : alloc_len;
errsts = fill_from_dev_buffer(scp, arr, len);
kfree(arr);
return errsts;
}
static int resp_rsup_tmfs(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
bool repd;
u32 alloc_len, len;
u8 arr[16];
u8 *cmd = scp->cmnd;
memset(arr, 0, sizeof(arr));
repd = !!(cmd[2] & 0x80);
alloc_len = get_unaligned_be32(cmd + 6);
if (alloc_len < 4) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
return check_condition_result;
}
arr[0] = 0xc8; /* ATS | ATSS | LURS */
arr[1] = 0x1; /* ITNRS */
if (repd) {
arr[3] = 0xc;
len = 16;
} else
len = 4;
len = (len < alloc_len) ? len : alloc_len;
return fill_from_dev_buffer(scp, arr, len);
}
/* <<Following mode page info copied from ST318451LW>> */
static int resp_err_recov_pg(unsigned char *p, int pcontrol, int target)
{ /* Read-Write Error Recovery page for mode_sense */
unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
5, 0, 0xff, 0xff};
memcpy(p, err_recov_pg, sizeof(err_recov_pg));
if (1 == pcontrol)
memset(p + 2, 0, sizeof(err_recov_pg) - 2);
return sizeof(err_recov_pg);
}
static int resp_disconnect_pg(unsigned char *p, int pcontrol, int target)
{ /* Disconnect-Reconnect page for mode_sense */
unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0};
memcpy(p, disconnect_pg, sizeof(disconnect_pg));
if (1 == pcontrol)
memset(p + 2, 0, sizeof(disconnect_pg) - 2);
return sizeof(disconnect_pg);
}
static int resp_format_pg(unsigned char *p, int pcontrol, int target)
{ /* Format device page for mode_sense */
unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0x40, 0, 0, 0};
memcpy(p, format_pg, sizeof(format_pg));
put_unaligned_be16(sdebug_sectors_per, p + 10);
put_unaligned_be16(sdebug_sector_size, p + 12);
if (sdebug_removable)
p[20] |= 0x20; /* should agree with INQUIRY */
if (1 == pcontrol)
memset(p + 2, 0, sizeof(format_pg) - 2);
return sizeof(format_pg);
}
static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
0, 0, 0, 0};
static int resp_caching_pg(unsigned char *p, int pcontrol, int target)
{ /* Caching page for mode_sense */
unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
if (SDEBUG_OPT_N_WCE & sdebug_opts)
caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
memcpy(p, caching_pg, sizeof(caching_pg));
if (1 == pcontrol)
memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
else if (2 == pcontrol)
memcpy(p, d_caching_pg, sizeof(d_caching_pg));
return sizeof(caching_pg);
}
static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
0, 0, 0x2, 0x4b};
static int resp_ctrl_m_pg(unsigned char *p, int pcontrol, int target)
{ /* Control mode page for mode_sense */
unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
0, 0, 0, 0};
unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
0, 0, 0x2, 0x4b};
if (sdebug_dsense)
ctrl_m_pg[2] |= 0x4;
else
ctrl_m_pg[2] &= ~0x4;
if (sdebug_ato)
ctrl_m_pg[5] |= 0x80; /* ATO=1 */
memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
if (1 == pcontrol)
memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
else if (2 == pcontrol)
memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
return sizeof(ctrl_m_pg);
}
static int resp_iec_m_pg(unsigned char *p, int pcontrol, int target)
{ /* Informational Exceptions control mode page for mode_sense */
unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
0, 0, 0x0, 0x0};
unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
0, 0, 0x0, 0x0};
memcpy(p, iec_m_pg, sizeof(iec_m_pg));
if (1 == pcontrol)
memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
else if (2 == pcontrol)
memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
return sizeof(iec_m_pg);
}
static int resp_sas_sf_m_pg(unsigned char *p, int pcontrol, int target)
{ /* SAS SSP mode page - short format for mode_sense */
unsigned char sas_sf_m_pg[] = {0x19, 0x6,
0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
if (1 == pcontrol)
memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
return sizeof(sas_sf_m_pg);
}
static int resp_sas_pcd_m_spg(unsigned char *p, int pcontrol, int target,
int target_dev_id)
{ /* SAS phy control and discover mode page for mode_sense */
unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
0x2, 0, 0, 0, 0, 0, 0, 0,
0x88, 0x99, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
0x3, 0, 0, 0, 0, 0, 0, 0,
0x88, 0x99, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
};
int port_a, port_b;
put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16);
put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24);
put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64);
put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72);
port_a = target_dev_id + 1;
port_b = port_a + 1;
memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
put_unaligned_be32(port_a, p + 20);
put_unaligned_be32(port_b, p + 48 + 20);
if (1 == pcontrol)
memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
return sizeof(sas_pcd_m_pg);
}
static int resp_sas_sha_m_spg(unsigned char *p, int pcontrol)
{ /* SAS SSP shared protocol specific port mode subpage */
unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
0, 0, 0, 0, 0, 0, 0, 0,
};
memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
if (1 == pcontrol)
memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
return sizeof(sas_sha_m_pg);
}
#define SDEBUG_MAX_MSENSE_SZ 256
static int resp_mode_sense(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
int pcontrol, pcode, subpcode, bd_len;
unsigned char dev_spec;
int alloc_len, offset, len, target_dev_id;
int target = scp->device->id;
unsigned char *ap;
unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
unsigned char *cmd = scp->cmnd;
bool dbd, llbaa, msense_6, is_disk, bad_pcode;
dbd = !!(cmd[1] & 0x8); /* disable block descriptors */
pcontrol = (cmd[2] & 0xc0) >> 6;
pcode = cmd[2] & 0x3f;
subpcode = cmd[3];
msense_6 = (MODE_SENSE == cmd[0]);
llbaa = msense_6 ? false : !!(cmd[1] & 0x10);
is_disk = (sdebug_ptype == TYPE_DISK);
if (is_disk && !dbd)
bd_len = llbaa ? 16 : 8;
else
bd_len = 0;
alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7);
memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
if (0x3 == pcontrol) { /* Saving values not supported */
mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
return check_condition_result;
}
target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
(devip->target * 1000) - 3;
/* for disks set DPOFUA bit and clear write protect (WP) bit */
if (is_disk) {
dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */
if (sdebug_wp)
dev_spec |= 0x80;
} else
dev_spec = 0x0;
if (msense_6) {
arr[2] = dev_spec;
arr[3] = bd_len;
offset = 4;
} else {
arr[3] = dev_spec;
if (16 == bd_len)
arr[4] = 0x1; /* set LONGLBA bit */
arr[7] = bd_len; /* assume 255 or less */
offset = 8;
}
ap = arr + offset;
if ((bd_len > 0) && (!sdebug_capacity))
sdebug_capacity = get_sdebug_capacity();
if (8 == bd_len) {
if (sdebug_capacity > 0xfffffffe)
put_unaligned_be32(0xffffffff, ap + 0);
else
put_unaligned_be32(sdebug_capacity, ap + 0);
put_unaligned_be16(sdebug_sector_size, ap + 6);
offset += bd_len;
ap = arr + offset;
} else if (16 == bd_len) {
put_unaligned_be64((u64)sdebug_capacity, ap + 0);
put_unaligned_be32(sdebug_sector_size, ap + 12);
offset += bd_len;
ap = arr + offset;
}
if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
/* TODO: Control Extension page */
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
return check_condition_result;
}
bad_pcode = false;
switch (pcode) {
case 0x1: /* Read-Write error recovery page, direct access */
len = resp_err_recov_pg(ap, pcontrol, target);
offset += len;
break;
case 0x2: /* Disconnect-Reconnect page, all devices */
len = resp_disconnect_pg(ap, pcontrol, target);
offset += len;
break;
case 0x3: /* Format device page, direct access */
if (is_disk) {
len = resp_format_pg(ap, pcontrol, target);
offset += len;
} else
bad_pcode = true;
break;
case 0x8: /* Caching page, direct access */
if (is_disk) {
len = resp_caching_pg(ap, pcontrol, target);
offset += len;
} else
bad_pcode = true;
break;
case 0xa: /* Control Mode page, all devices */
len = resp_ctrl_m_pg(ap, pcontrol, target);
offset += len;
break;
case 0x19: /* if spc==1 then sas phy, control+discover */
if ((subpcode > 0x2) && (subpcode < 0xff)) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
return check_condition_result;
}
len = 0;
if ((0x0 == subpcode) || (0xff == subpcode))
len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
if ((0x1 == subpcode) || (0xff == subpcode))
len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
target_dev_id);
if ((0x2 == subpcode) || (0xff == subpcode))