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linux/drivers/scsi/scsi_debug.c
Rasmus Villemoes 48a968763d scsi: replace strnicmp with strncasecmp 
The kernel used to contain two functions for length-delimited,
case-insensitive string comparison, strnicmp with correct semantics and
a slightly buggy strncasecmp.  The latter is the POSIX name, so strnicmp
was renamed to strncasecmp, and strnicmp made into a wrapper for the new
strncasecmp to avoid breaking existing users.

To allow the compat wrapper strnicmp to be removed at some point in the
future, and to avoid the extra indirection cost, do
s/strnicmp/strncasecmp/g.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-10-14 02:18:24 +02:00

4712 lines
134 KiB
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/*
* 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 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
*
* This version is more generic, simulating a variable number of disk
* (or disk like devices) sharing a common amount of RAM. To be more
* realistic, the simulated devices have the transport attributes of
* SAS disks.
*
*
* For documentation see http://sg.danny.cz/sg/sdebug26.html
*
* D. Gilbert (dpg) work for Magneto-Optical device test [20010421]
* dpg: work for devfs large number of disks [20010809]
* forked for lk 2.5 series [20011216, 20020101]
* use vmalloc() more inquiry+mode_sense [20020302]
* add timers for delayed responses [20020721]
* Patrick Mansfield <patmans@us.ibm.com> max_luns+scsi_level [20021031]
* Mike Anderson <andmike@us.ibm.com> sysfs work [20021118]
* dpg: change style of boot options to "scsi_debug.num_tgts=2" and
* module options to "modprobe scsi_debug num_tgts=2" [20021221]
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/timer.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 <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"
#define SCSI_DEBUG_VERSION "1.84"
static const char *scsi_debug_version_date = "20140706";
#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 ADDR_OUT_OF_RANGE 0x21
#define INVALID_COMMAND_OPCODE 0x20
#define INVALID_FIELD_IN_CDB 0x24
#define INVALID_FIELD_IN_PARAM_LIST 0x26
#define UA_RESET_ASC 0x29
#define UA_CHANGED_ASC 0x2a
#define POWER_ON_RESET_ASCQ 0x0
#define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
#define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
#define SAVING_PARAMS_UNSUP 0x39
#define TRANSPORT_PROBLEM 0x4b
#define THRESHOLD_EXCEEDED 0x5d
#define LOW_POWER_COND_ON 0x5e
/* 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_DELAY 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 64
#define DEF_PHYSBLK_EXP 0
#define DEF_PTYPE 0
#define DEF_REMOVABLE false
#define DEF_SCSI_LEVEL 6 /* INQUIRY, byte2 [6->SPC-4] */
#define DEF_SECTOR_SIZE 512
#define DEF_TAGGED_QUEUING 0 /* 0 | MSG_SIMPLE_TAG | MSG_ORDERED_TAG */
#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 DELAY_OVERRIDDEN -9999
/* bit mask values for scsi_debug_opts */
#define SCSI_DEBUG_OPT_NOISE 1
#define SCSI_DEBUG_OPT_MEDIUM_ERR 2
#define SCSI_DEBUG_OPT_TIMEOUT 4
#define SCSI_DEBUG_OPT_RECOVERED_ERR 8
#define SCSI_DEBUG_OPT_TRANSPORT_ERR 16
#define SCSI_DEBUG_OPT_DIF_ERR 32
#define SCSI_DEBUG_OPT_DIX_ERR 64
#define SCSI_DEBUG_OPT_MAC_TIMEOUT 128
#define SCSI_DEBUG_OPT_SHORT_TRANSFER 0x100
#define SCSI_DEBUG_OPT_Q_NOISE 0x200
#define SCSI_DEBUG_OPT_ALL_TSF 0x400
#define SCSI_DEBUG_OPT_RARE_TSF 0x800
#define SCSI_DEBUG_OPT_N_WCE 0x1000
#define SCSI_DEBUG_OPT_RESET_NOISE 0x2000
#define SCSI_DEBUG_OPT_NO_CDB_NOISE 0x4000
#define SCSI_DEBUG_OPT_ALL_NOISE (0x1 | 0x200 | 0x2000)
/* When "every_nth" > 0 then modulo "every_nth" commands:
* - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
* - a RECOVERED_ERROR is simulated on successful read and write
* commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
* - a TRANSPORT_ERROR is simulated on successful read and write
* commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
*
* When "every_nth" < 0 then after "- every_nth" commands:
* - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
* - a RECOVERED_ERROR is simulated on successful read and write
* commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
* - a TRANSPORT_ERROR is simulated on successful read and write
* commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
* This will continue until some other action occurs (e.g. the user
* writing a new value (other than -1 or 1) to every_nth via sysfs).
*/
/* 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_NUM_UAS 3
/* for check_readiness() */
#define UAS_ONLY 1
#define UAS_TUR 0
/* when 1==SCSI_DEBUG_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
#define SAM2_WLUN_REPORT_LUNS 0xc101
/* SCSI_DEBUG_CANQUEUE is the maximum number of commands that can be queued
* (for response) at one time. Can be reduced by max_queue option. Command
* responses are not queued when delay=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
* SCSI_DEBUG_CANQUEUE. */
#define SCSI_DEBUG_CANQUEUE_WORDS 9 /* a WORD is bits in a long */
#define SCSI_DEBUG_CANQUEUE (SCSI_DEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
#define DEF_CMD_PER_LUN 255
#if DEF_CMD_PER_LUN > SCSI_DEBUG_CANQUEUE
#warning "Expect DEF_CMD_PER_LUN <= SCSI_DEBUG_CANQUEUE"
#endif
static int scsi_debug_add_host = DEF_NUM_HOST;
static int scsi_debug_ato = DEF_ATO;
static int scsi_debug_delay = DEF_DELAY;
static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
static int scsi_debug_dif = DEF_DIF;
static int scsi_debug_dix = DEF_DIX;
static int scsi_debug_dsense = DEF_D_SENSE;
static int scsi_debug_every_nth = DEF_EVERY_NTH;
static int scsi_debug_fake_rw = DEF_FAKE_RW;
static unsigned int scsi_debug_guard = DEF_GUARD;
static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED;
static int scsi_debug_max_luns = DEF_MAX_LUNS;
static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE;
static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
static int scsi_debug_ndelay = DEF_NDELAY;
static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
static int scsi_debug_no_uld = 0;
static int scsi_debug_num_parts = DEF_NUM_PARTS;
static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */
static int scsi_debug_opt_blks = DEF_OPT_BLKS;
static int scsi_debug_opts = DEF_OPTS;
static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP;
static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
static int scsi_debug_sector_size = DEF_SECTOR_SIZE;
static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
static unsigned int scsi_debug_lbpu = DEF_LBPU;
static unsigned int scsi_debug_lbpws = DEF_LBPWS;
static unsigned int scsi_debug_lbpws10 = DEF_LBPWS10;
static unsigned int scsi_debug_lbprz = DEF_LBPRZ;
static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY;
static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH;
static bool scsi_debug_removable = DEF_REMOVABLE;
static bool scsi_debug_clustering;
static bool scsi_debug_host_lock = DEF_HOST_LOCK;
static atomic_t sdebug_cmnd_count;
static atomic_t sdebug_completions;
static atomic_t sdebug_a_tsf; /* counter of 'almost' TSFs */
#define DEV_READONLY(TGT) (0)
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 */
#define SDEBUG_MAX_PARTS 4
#define SCSI_DEBUG_MAX_CMD_LEN 32
static unsigned int scsi_debug_lbp(void)
{
return ((0 == scsi_debug_fake_rw) &&
(scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10));
}
struct sdebug_dev_info {
struct list_head dev_list;
unsigned int channel;
unsigned int target;
u64 lun;
struct sdebug_host_info *sdbg_host;
u64 wlun;
unsigned long uas_bm[1];
atomic_t num_in_q;
char stopped;
char 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)
static LIST_HEAD(sdebug_host_list);
static DEFINE_SPINLOCK(sdebug_host_list_lock);
struct sdebug_hrtimer { /* ... is derived from hrtimer */
struct hrtimer hrt; /* must be first element */
int qa_indx;
};
struct sdebug_queued_cmd {
/* in_use flagged by a bit in queued_in_use_bm[] */
struct timer_list *cmnd_timerp;
struct tasklet_struct *tletp;
struct sdebug_hrtimer *sd_hrtp;
struct scsi_cmnd * a_cmnd;
};
static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
static unsigned long queued_in_use_bm[SCSI_DEBUG_CANQUEUE_WORDS];
static unsigned char * fake_storep; /* ramdisk storage */
static struct sd_dif_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 DEFINE_SPINLOCK(queued_arr_lock);
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;
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 unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
0, 0, 0x2, 0x4b};
static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
0, 0, 0x0, 0x0};
static void *fake_store(unsigned long long lba)
{
lba = do_div(lba, sdebug_store_sectors);
return fake_storep + lba * scsi_debug_sector_size;
}
static struct sd_dif_tuple *dif_store(sector_t sector)
{
sector = do_div(sector, sdebug_store_sectors);
return dif_storep + sector;
}
static int sdebug_add_adapter(void);
static void sdebug_remove_adapter(void);
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) &&
(scsi_debug_num_tgts > hpnt->this_id))
hpnt->max_id = scsi_debug_num_tgts + 1;
else
hpnt->max_id = scsi_debug_num_tgts;
/* scsi_debug_max_luns; */
hpnt->max_lun = SAM2_WLUN_REPORT_LUNS;
}
spin_unlock(&sdebug_host_list_lock);
}
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(scsi_debug_dsense, sbuff, key, asc, asq);
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
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 get_data_transfer_info(unsigned char *cmd,
unsigned long long *lba, unsigned int *num,
u32 *ei_lba)
{
*ei_lba = 0;
switch (*cmd) {
case VARIABLE_LENGTH_CMD:
*lba = (u64)cmd[19] | (u64)cmd[18] << 8 |
(u64)cmd[17] << 16 | (u64)cmd[16] << 24 |
(u64)cmd[15] << 32 | (u64)cmd[14] << 40 |
(u64)cmd[13] << 48 | (u64)cmd[12] << 56;
*ei_lba = (u32)cmd[23] | (u32)cmd[22] << 8 |
(u32)cmd[21] << 16 | (u32)cmd[20] << 24;
*num = (u32)cmd[31] | (u32)cmd[30] << 8 | (u32)cmd[29] << 16 |
(u32)cmd[28] << 24;
break;
case WRITE_SAME_16:
case WRITE_16:
case READ_16:
*lba = (u64)cmd[9] | (u64)cmd[8] << 8 |
(u64)cmd[7] << 16 | (u64)cmd[6] << 24 |
(u64)cmd[5] << 32 | (u64)cmd[4] << 40 |
(u64)cmd[3] << 48 | (u64)cmd[2] << 56;
*num = (u32)cmd[13] | (u32)cmd[12] << 8 | (u32)cmd[11] << 16 |
(u32)cmd[10] << 24;
break;
case WRITE_12:
case READ_12:
*lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 |
(u32)cmd[2] << 24;
*num = (u32)cmd[9] | (u32)cmd[8] << 8 | (u32)cmd[7] << 16 |
(u32)cmd[6] << 24;
break;
case WRITE_SAME:
case WRITE_10:
case READ_10:
case XDWRITEREAD_10:
*lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 |
(u32)cmd[2] << 24;
*num = (u32)cmd[8] | (u32)cmd[7] << 8;
break;
case WRITE_6:
case READ_6:
*lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
(u32)(cmd[1] & 0x1f) << 16;
*num = (0 == cmd[4]) ? 256 : cmd[4];
break;
default:
break;
}
}
static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
{
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
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 int check_readiness(struct scsi_cmnd *SCpnt, int uas_only,
struct sdebug_dev_info * devip)
{
int k;
bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts);
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(SCpnt, UNIT_ATTENTION,
UA_RESET_ASC, POWER_ON_RESET_ASCQ);
if (debug)
cp = "power on reset";
break;
case SDEBUG_UA_BUS_RESET:
mk_sense_buffer(SCpnt, UNIT_ATTENTION,
UA_RESET_ASC, BUS_RESET_ASCQ);
if (debug)
cp = "bus reset";
break;
case SDEBUG_UA_MODE_CHANGED:
mk_sense_buffer(SCpnt, UNIT_ATTENTION,
UA_CHANGED_ASC, MODE_CHANGED_ASCQ);
if (debug)
cp = "mode parameters changed";
break;
default:
pr_warn("%s: unexpected unit attention code=%d\n",
__func__, k);
if (debug)
cp = "unknown";
break;
}
clear_bit(k, devip->uas_bm);
if (debug)
sdev_printk(KERN_INFO, SCpnt->device,
"%s reports: Unit attention: %s\n",
my_name, cp);
return check_condition_result;
}
if ((UAS_TUR == uas_only) && devip->stopped) {
mk_sense_buffer(SCpnt, NOT_READY, LOGICAL_UNIT_NOT_READY,
0x2);
if (debug)
sdev_printk(KERN_INFO, SCpnt->device,
"%s reports: Not ready: %s\n", my_name,
"initializing command required");
return check_condition_result;
}
return 0;
}
/* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */
static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
int arr_len)
{
int act_len;
struct scsi_data_buffer *sdb = scsi_in(scp);
if (!sdb->length)
return 0;
if (!(scsi_bidi_cmnd(scp) || 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);
sdb->resid = scsi_bufflen(scp) - act_len;
return 0;
}
/* 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 (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
return -1;
return scsi_sg_copy_to_buffer(scp, arr, arr_len);
}
static const char * inq_vendor_id = "Linux ";
static const char * inq_product_id = "scsi_debug ";
static const char *inq_product_rev = "0184"; /* version less '.' */
/* Device identification VPD page. Returns number of bytes placed in arr */
static int inquiry_evpd_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)
{
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], inq_vendor_id, 8);
memcpy(&arr[12], 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) {
/* NAA-5, Logical unit identifier (binary) */
arr[num++] = 0x1; /* binary (not necessarily sas) */
arr[num++] = 0x3; /* PIV=0, lu, naa */
arr[num++] = 0x0;
arr[num++] = 0x8;
arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */
arr[num++] = 0x33;
arr[num++] = 0x33;
arr[num++] = 0x30;
arr[num++] = (dev_id_num >> 24);
arr[num++] = (dev_id_num >> 16) & 0xff;
arr[num++] = (dev_id_num >> 8) & 0xff;
arr[num++] = dev_id_num & 0xff;
/* 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-5, Target port identifier */
arr[num++] = 0x61; /* proto=sas, binary */
arr[num++] = 0x93; /* piv=1, target port, naa */
arr[num++] = 0x0;
arr[num++] = 0x8;
arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
arr[num++] = 0x22;
arr[num++] = 0x22;
arr[num++] = 0x20;
arr[num++] = (port_a >> 24);
arr[num++] = (port_a >> 16) & 0xff;
arr[num++] = (port_a >> 8) & 0xff;
arr[num++] = port_a & 0xff;
/* NAA-5, 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;
arr[num++] = (port_group_id >> 8) & 0xff;
arr[num++] = port_group_id & 0xff;
/* NAA-5, Target device identifier */
arr[num++] = 0x61; /* proto=sas, binary */
arr[num++] = 0xa3; /* piv=1, target device, naa */
arr[num++] = 0x0;
arr[num++] = 0x8;
arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
arr[num++] = 0x22;
arr[num++] = 0x22;
arr[num++] = 0x20;
arr[num++] = (target_dev_id >> 24);
arr[num++] = (target_dev_id >> 16) & 0xff;
arr[num++] = (target_dev_id >> 8) & 0xff;
arr[num++] = target_dev_id & 0xff;
/* 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.52222220", 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_evpd_84(unsigned char * arr)
{
memcpy(arr, vpd84_data, sizeof(vpd84_data));
return sizeof(vpd84_data);
}
/* Management network addresses VPD page */
static int inquiry_evpd_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_evpd_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 */
arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
arr[num++] = 0x22;
arr[num++] = 0x22;
arr[num++] = 0x20;
arr[num++] = (port_a >> 24);
arr[num++] = (port_a >> 16) & 0xff;
arr[num++] = (port_a >> 8) & 0xff;
arr[num++] = port_a & 0xff;
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 */
arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
arr[num++] = 0x22;
arr[num++] = 0x22;
arr[num++] = 0x20;
arr[num++] = (port_b >> 24);
arr[num++] = (port_b >> 16) & 0xff;
arr[num++] = (port_b >> 8) & 0xff;
arr[num++] = port_b & 0xff;
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_evpd_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_evpd_b0(unsigned char * arr)
{
unsigned int gran;
memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
/* Optimal transfer length granularity */
gran = 1 << scsi_debug_physblk_exp;
arr[2] = (gran >> 8) & 0xff;
arr[3] = gran & 0xff;
/* Maximum Transfer Length */
if (sdebug_store_sectors > 0x400) {
arr[4] = (sdebug_store_sectors >> 24) & 0xff;
arr[5] = (sdebug_store_sectors >> 16) & 0xff;
arr[6] = (sdebug_store_sectors >> 8) & 0xff;
arr[7] = sdebug_store_sectors & 0xff;
}
/* Optimal Transfer Length */
put_unaligned_be32(scsi_debug_opt_blks, &arr[8]);
if (scsi_debug_lbpu) {
/* Maximum Unmap LBA Count */
put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]);
/* Maximum Unmap Block Descriptor Count */
put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]);
}
/* Unmap Granularity Alignment */
if (scsi_debug_unmap_alignment) {
put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]);
arr[28] |= 0x80; /* UGAVALID */
}
/* Optimal Unmap Granularity */
put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]);
/* Maximum WRITE SAME Length */
put_unaligned_be64(scsi_debug_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_evpd_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-3) */
static int inquiry_evpd_b2(unsigned char *arr)
{
memset(arr, 0, 0x4);
arr[0] = 0; /* threshold exponent */
if (scsi_debug_lbpu)
arr[1] = 1 << 7;
if (scsi_debug_lbpws)
arr[1] |= 1 << 6;
if (scsi_debug_lbpws10)
arr[1] |= 1 << 5;
if (scsi_debug_lbprz)
arr[1] |= 1 << 2;
return 0x4;
}
#define SDEBUG_LONG_INQ_SZ 96
#define SDEBUG_MAX_INQ_ARR_SZ 584
static int resp_inquiry(struct scsi_cmnd *scp, int target,
struct sdebug_dev_info * devip)
{
unsigned char pq_pdt;
unsigned char * arr;
unsigned char *cmd = scp->cmnd;
int alloc_len, n, ret;
alloc_len = (cmd[3] << 8) + cmd[4];
arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
if (! arr)
return DID_REQUEUE << 16;
if (devip->wlun)
pq_pdt = 0x1e; /* present, wlun */
else if (scsi_debug_no_lun_0 && (0 == devip->lun))
pq_pdt = 0x7f; /* not present, no device type */
else
pq_pdt = (scsi_debug_ptype & 0x1f);
arr[0] = pq_pdt;
if (0x2 & cmd[1]) { /* CMDDT bit set */
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
0);
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 (0 == scsi_debug_vpd_use_hostno)
host_no = 0;
lu_id_num = devip->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 */
arr[n++] = 0x89; /* ATA information */
arr[n++] = 0xb0; /* Block limits (SBC) */
arr[n++] = 0xb1; /* Block characteristics (SBC) */
if (scsi_debug_lbp()) /* Logical Block Prov. (SBC) */
arr[n++] = 0xb2;
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_evpd_83(&arr[4], port_group_id,
target_dev_id, lu_id_num,
lu_id_str, len);
} else if (0x84 == cmd[2]) { /* Software interface ident. */
arr[1] = cmd[2]; /*sanity */
arr[3] = inquiry_evpd_84(&arr[4]);
} else if (0x85 == cmd[2]) { /* Management network addresses */
arr[1] = cmd[2]; /*sanity */
arr[3] = inquiry_evpd_85(&arr[4]);
} else if (0x86 == cmd[2]) { /* extended inquiry */
arr[1] = cmd[2]; /*sanity */
arr[3] = 0x3c; /* number of following entries */
if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION)
arr[4] = 0x4; /* SPT: GRD_CHK:1 */
else if (scsi_debug_dif)
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_evpd_88(&arr[4], target_dev_id);
} else if (0x89 == cmd[2]) { /* ATA information */
arr[1] = cmd[2]; /*sanity */
n = inquiry_evpd_89(&arr[4]);
arr[2] = (n >> 8);
arr[3] = (n & 0xff);
} else if (0xb0 == cmd[2]) { /* Block limits (SBC) */
arr[1] = cmd[2]; /*sanity */
arr[3] = inquiry_evpd_b0(&arr[4]);
} else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */
arr[1] = cmd[2]; /*sanity */
arr[3] = inquiry_evpd_b1(&arr[4]);
} else if (0xb2 == cmd[2]) { /* Logical Block Prov. (SBC) */
arr[1] = cmd[2]; /*sanity */
arr[3] = inquiry_evpd_b2(&arr[4]);
} else {
/* Illegal request, invalid field in cdb */
mk_sense_buffer(scp, ILLEGAL_REQUEST,
INVALID_FIELD_IN_CDB, 0);
kfree(arr);
return check_condition_result;
}
len = min(((arr[2] << 8) + arr[3]) + 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] = scsi_debug_removable ? 0x80 : 0; /* Removable disk */
arr[2] = scsi_debug_scsi_level;
arr[3] = 2; /* response_data_format==2 */
arr[4] = SDEBUG_LONG_INQ_SZ - 5;
arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */
if (0 == scsi_debug_vpd_use_hostno)
arr[5] = 0x10; /* claim: implicit TGPS */
arr[6] = 0x10; /* claim: MultiP */
/* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
arr[7] = 0xa; /* claim: LINKED + CMDQUE */
memcpy(&arr[8], inq_vendor_id, 8);
memcpy(&arr[16], inq_product_id, 16);
memcpy(&arr[32], inq_product_rev, 4);
/* version descriptors (2 bytes each) follow */
arr[58] = 0x0; arr[59] = 0xa2; /* SAM-5 rev 4 */
arr[60] = 0x4; arr[61] = 0x68; /* SPC-4 rev 37 */
n = 62;
if (scsi_debug_ptype == 0) {
arr[n++] = 0x4; arr[n++] = 0xc5; /* SBC-4 rev 36 */
} else if (scsi_debug_ptype == 1) {
arr[n++] = 0x5; arr[n++] = 0x25; /* SSC-4 rev 3 */
}
arr[n++] = 0x20; arr[n++] = 0xe6; /* SPL-3 rev 7 */
ret = fill_from_dev_buffer(scp, arr,
min(alloc_len, SDEBUG_LONG_INQ_SZ));
kfree(arr);
return ret;
}
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];
int want_dsense;
int len = 18;
memset(arr, 0, sizeof(arr));
want_dsense = !!(cmd[1] & 1) || scsi_debug_dsense;
sbuff = scp->sense_buffer;
if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
if (want_dsense) {
arr[0] = 0x72;
arr[1] = 0x0; /* NO_SENSE in sense_key */
arr[2] = THRESHOLD_EXCEEDED;
arr[3] = 0xff; /* TEST set and MRIE==6 */
} 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 ((cmd[1] & 1) && (! scsi_debug_dsense)) {
/* DESC bit set and sense_buff in fixed format */
memset(arr, 0, sizeof(arr));
arr[0] = 0x72;
arr[1] = sbuff[2]; /* sense key */
arr[2] = sbuff[12]; /* asc */
arr[3] = sbuff[13]; /* ascq */
len = 8;
}
}
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, errsts, start;
errsts = check_readiness(scp, UAS_ONLY, devip);
if (errsts)
return errsts;
power_cond = (cmd[4] & 0xf0) >> 4;
if (power_cond) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
0);
return check_condition_result;
}
start = cmd[4] & 1;
if (start == devip->stopped)
devip->stopped = !start;
return 0;
}
static sector_t get_sdebug_capacity(void)
{
if (scsi_debug_virtual_gb > 0)
return (sector_t)scsi_debug_virtual_gb *
(1073741824 / scsi_debug_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;
int errsts;
errsts = check_readiness(scp, UAS_ONLY, devip);
if (errsts)
return errsts;
/* 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;
arr[0] = (capac >> 24);
arr[1] = (capac >> 16) & 0xff;
arr[2] = (capac >> 8) & 0xff;
arr[3] = capac & 0xff;
} else {
arr[0] = 0xff;
arr[1] = 0xff;
arr[2] = 0xff;
arr[3] = 0xff;
}
arr[6] = (scsi_debug_sector_size >> 8) & 0xff;
arr[7] = scsi_debug_sector_size & 0xff;
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];
unsigned long long capac;
int errsts, k, alloc_len;
errsts = check_readiness(scp, UAS_ONLY, devip);
if (errsts)
return errsts;
alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8)
+ cmd[13]);
/* following just in case virtual_gb changed */
sdebug_capacity = get_sdebug_capacity();
memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
capac = sdebug_capacity - 1;
for (k = 0; k < 8; ++k, capac >>= 8)
arr[7 - k] = capac & 0xff;
arr[8] = (scsi_debug_sector_size >> 24) & 0xff;
arr[9] = (scsi_debug_sector_size >> 16) & 0xff;
arr[10] = (scsi_debug_sector_size >> 8) & 0xff;
arr[11] = scsi_debug_sector_size & 0xff;
arr[13] = scsi_debug_physblk_exp & 0xf;
arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f;
if (scsi_debug_lbp()) {
arr[14] |= 0x80; /* LBPME */
if (scsi_debug_lbprz)
arr[14] |= 0x40; /* LBPRZ */
}
arr[15] = scsi_debug_lowest_aligned & 0xff;
if (scsi_debug_dif) {
arr[12] = (scsi_debug_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 = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8)
+ cmd[9]);
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 (0 == scsi_debug_vpd_use_hostno) {
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; /* claim: only support active/optimized paths */
}
arr[n++] = (port_group_a >> 8) & 0xff;
arr[n++] = port_group_a & 0xff;
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 */
arr[n++] = (port_a >> 8) & 0xff;
arr[n++] = port_a & 0xff;
arr[n++] = 3; /* Port unavailable */
arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
arr[n++] = (port_group_b >> 8) & 0xff;
arr[n++] = port_group_b & 0xff;
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 */
arr[n++] = (port_b >> 8) & 0xff;
arr[n++] = port_b & 0xff;
rlen = n - 4;
arr[0] = (rlen >> 24) & 0xff;
arr[1] = (rlen >> 16) & 0xff;
arr[2] = (rlen >> 8) & 0xff;
arr[3] = rlen & 0xff;
/*
* 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;
}
/* <<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));
p[10] = (sdebug_sectors_per >> 8) & 0xff;
p[11] = sdebug_sectors_per & 0xff;
p[12] = (scsi_debug_sector_size >> 8) & 0xff;
p[13] = scsi_debug_sector_size & 0xff;
if (scsi_debug_removable)
p[20] |= 0x20; /* should agree with INQUIRY */
if (1 == pcontrol)
memset(p + 2, 0, sizeof(format_pg) - 2);
return sizeof(format_pg);
}
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 (SCSI_DEBUG_OPT_N_WCE & scsi_debug_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 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 (scsi_debug_dsense)
ctrl_m_pg[2] |= 0x4;
else
ctrl_m_pg[2] &= ~0x4;
if (scsi_debug_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,
0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
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,
0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
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;
port_a = target_dev_id + 1;
port_b = port_a + 1;
memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
p[20] = (port_a >> 24);
p[21] = (port_a >> 16) & 0xff;
p[22] = (port_a >> 8) & 0xff;
p[23] = port_a & 0xff;
p[48 + 20] = (port_b >> 24);
p[48 + 21] = (port_b >> 16) & 0xff;
p[48 + 22] = (port_b >> 8) & 0xff;
p[48 + 23] = port_b & 0xff;
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, int target,
struct sdebug_dev_info * devip)
{
unsigned char dbd, llbaa;
int pcontrol, pcode, subpcode, bd_len;
unsigned char dev_spec;
int k, alloc_len, msense_6, offset, len, errsts, target_dev_id;
unsigned char * ap;
unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
unsigned char *cmd = scp->cmnd;
errsts = check_readiness(scp, UAS_ONLY, devip);
if (errsts)
return errsts;
dbd = !!(cmd[1] & 0x8);
pcontrol = (cmd[2] & 0xc0) >> 6;
pcode = cmd[2] & 0x3f;
subpcode = cmd[3];
msense_6 = (MODE_SENSE == cmd[0]);
llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10);
if ((0 == scsi_debug_ptype) && (0 == dbd))
bd_len = llbaa ? 16 : 8;
else
bd_len = 0;
alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
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;
/* set DPOFUA bit for disks */
if (0 == scsi_debug_ptype)
dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10;
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) {
ap[0] = 0xff;
ap[1] = 0xff;
ap[2] = 0xff;
ap[3] = 0xff;
} else {
ap[0] = (sdebug_capacity >> 24) & 0xff;
ap[1] = (sdebug_capacity >> 16) & 0xff;
ap[2] = (sdebug_capacity >> 8) & 0xff;
ap[3] = sdebug_capacity & 0xff;
}
ap[6] = (scsi_debug_sector_size >> 8) & 0xff;
ap[7] = scsi_debug_sector_size & 0xff;
offset += bd_len;
ap = arr + offset;
} else if (16 == bd_len) {
unsigned long long capac = sdebug_capacity;
for (k = 0; k < 8; ++k, capac >>= 8)
ap[7 - k] = capac & 0xff;
ap[12] = (scsi_debug_sector_size >> 24) & 0xff;
ap[13] = (scsi_debug_sector_size >> 16) & 0xff;
ap[14] = (scsi_debug_sector_size >> 8) & 0xff;
ap[15] = scsi_debug_sector_size & 0xff;
offset += bd_len;
ap = arr + offset;
}
if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
/* TODO: Control Extension page */
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
0);
return check_condition_result;
}
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 */
len = resp_format_pg(ap, pcontrol, target);
offset += len;
break;
case 0x8: /* Caching page, direct access */
len = resp_caching_pg(ap, pcontrol, target);
offset += len;
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_buffer(scp, ILLEGAL_REQUEST,
INVALID_FIELD_IN_CDB, 0);
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))
len += resp_sas_sha_m_spg(ap + len, pcontrol);
offset += len;
break;
case 0x1c: /* Informational Exceptions Mode page, all devices */
len = resp_iec_m_pg(ap, pcontrol, target);
offset += len;
break;
case 0x3f: /* Read all Mode pages */
if ((0 == subpcode) || (0xff == subpcode)) {
len = resp_err_recov_pg(ap, pcontrol, target);
len += resp_disconnect_pg(ap + len, pcontrol, target);
len += resp_format_pg(ap + len, pcontrol, target);
len += resp_caching_pg(ap + len, pcontrol, target);
len += resp_ctrl_m_pg(ap + len, pcontrol, target);
len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
if (0xff == subpcode) {
len += resp_sas_pcd_m_spg(ap + len, pcontrol,
target, target_dev_id);
len += resp_sas_sha_m_spg(ap + len, pcontrol);
}
len += resp_iec_m_pg(ap + len, pcontrol, target);
} else {
mk_sense_buffer(scp, ILLEGAL_REQUEST,
INVALID_FIELD_IN_CDB, 0);
return check_condition_result;
}
offset += len;
break;
default:
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
0);
return check_condition_result;
}
if (msense_6)
arr[0] = offset - 1;
else {
arr[0] = ((offset - 2) >> 8) & 0xff;
arr[1] = (offset - 2) & 0xff;
}
return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
}
#define SDEBUG_MAX_MSELECT_SZ 512
static int resp_mode_select(struct scsi_cmnd * scp, int mselect6,
struct sdebug_dev_info * devip)
{
int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
int param_len, res, errsts, mpage;
unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
unsigned char *cmd = scp->cmnd;
errsts = check_readiness(scp, UAS_ONLY, devip);
if (errsts)
return errsts;
memset(arr, 0, sizeof(arr));
pf = cmd[1] & 0x10;
sp = cmd[1] & 0x1;
param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]);
if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
mk_sense_buffer(scp, ILLEGAL_REQUEST,
INVALID_FIELD_IN_CDB, 0);
return check_condition_result;
}
res = fetch_to_dev_buffer(scp, arr, param_len);
if (-1 == res)
return (DID_ERROR << 16);
else if ((res < param_len) &&
(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
sdev_printk(KERN_INFO, scp->device,
"%s: cdb indicated=%d, IO sent=%d bytes\n",
__func__, param_len, res);
md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2);
bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]);
if (md_len > 2) {
mk_sense_buffer(scp, ILLEGAL_REQUEST,
INVALID_FIELD_IN_PARAM_LIST, 0);
return check_condition_result;
}
off = bd_len + (mselect6 ? 4 : 8);
mpage = arr[off] & 0x3f;
ps = !!(arr[off] & 0x80);
if (ps) {
mk_sense_buffer(scp, ILLEGAL_REQUEST,
INVALID_FIELD_IN_PARAM_LIST, 0);
return check_condition_result;
}
spf = !!(arr[off] & 0x40);
pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) :
(arr[off + 1] + 2);
if ((pg_len + off) > param_len) {
mk_sense_buffer(scp, ILLEGAL_REQUEST,
PARAMETER_LIST_LENGTH_ERR, 0);
return check_condition_result;
}
switch (mpage) {
case 0x8: /* Caching Mode page */
if (caching_pg[1] == arr[off + 1]) {
memcpy(caching_pg + 2, arr + off + 2,
sizeof(caching_pg) - 2);
goto set_mode_changed_ua;
}
break;
case 0xa: /* Control Mode page */
if (ctrl_m_pg[1] == arr[off + 1]) {
memcpy(ctrl_m_pg + 2, arr + off + 2,
sizeof(ctrl_m_pg) - 2);
scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4);
goto set_mode_changed_ua;
}
break;
case 0x1c: /* Informational Exceptions Mode page */
if (iec_m_pg[1] == arr[off + 1]) {
memcpy(iec_m_pg + 2, arr + off + 2,
sizeof(iec_m_pg) - 2);
goto set_mode_changed_ua;
}
break;
default:
break;
}
mk_sense_buffer(scp, ILLEGAL_REQUEST,
INVALID_FIELD_IN_PARAM_LIST, 0);
return check_condition_result;
set_mode_changed_ua:
set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
return 0;
}
static int resp_temp_l_pg(unsigned char * arr)
{
unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
0x0, 0x1, 0x3, 0x2, 0x0, 65,
};
memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
return sizeof(temp_l_pg);
}
static int resp_ie_l_pg(unsigned char * arr)
{
unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
};
memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
if (iec_m_pg[2] & 0x4) { /* TEST bit set */
arr[4] = THRESHOLD_EXCEEDED;
arr[5] = 0xff;
}
return sizeof(ie_l_pg);
}
#define SDEBUG_MAX_LSENSE_SZ 512
static int resp_log_sense(struct scsi_cmnd * scp,
struct sdebug_dev_info * devip)
{
int ppc, sp, pcontrol, pcode, subpcode, alloc_len, errsts, len, n;
unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
unsigned char *cmd = scp->cmnd;
errsts = check_readiness(scp, UAS_ONLY, devip);
if (errsts)
return errsts;
memset(arr, 0, sizeof(arr));
ppc = cmd[1] & 0x2;
sp = cmd[1] & 0x1;
if (ppc || sp) {
mk_sense_buffer(scp, ILLEGAL_REQUEST,
INVALID_FIELD_IN_CDB, 0);
return check_condition_result;
}
pcontrol = (cmd[2] & 0xc0) >> 6;
pcode = cmd[2] & 0x3f;
subpcode = cmd[3] & 0xff;
alloc_len = (cmd[7] << 8) + cmd[8];
arr[0] = pcode;
if (0 == subpcode) {
switch (pcode) {
case 0x0: /* Supported log pages log page */
n = 4;
arr[n++] = 0x0; /* this page */
arr[n++] = 0xd; /* Temperature */
arr[n++] = 0x2f; /* Informational exceptions */
arr[3] = n - 4;
break;
case 0xd: /* Temperature log page */
arr[3] = resp_temp_l_pg(arr + 4);
break;
case 0x2f: /* Informational exceptions log page */
arr[3] = resp_ie_l_pg(arr + 4);
break;
default:
mk_sense_buffer(scp, ILLEGAL_REQUEST,
INVALID_FIELD_IN_CDB, 0);
return check_condition_result;
}
} else if (0xff == subpcode) {
arr[0] |= 0x40;
arr[1] = subpcode;
switch (pcode) {
case 0x0: /* Supported log pages and subpages log page */
n = 4;
arr[n++] = 0x0;
arr[n++] = 0x0; /* 0,0 page */
arr[n++] = 0x0;
arr[n++] = 0xff; /* this page */
arr[n++] = 0xd;
arr[n++] = 0x0; /* Temperature */
arr[n++] = 0x2f;
arr[n++] = 0x0; /* Informational exceptions */
arr[3] = n - 4;
break;
case 0xd: /* Temperature subpages */
n = 4;
arr[n++] = 0xd;
arr[n++] = 0x0; /* Temperature */
arr[3] = n - 4;
break;
case 0x2f: /* Informational exceptions subpages */
n = 4;
arr[n++] = 0x2f;
arr[n++] = 0x0; /* Informational exceptions */
arr[3] = n - 4;
break;
default:
mk_sense_buffer(scp, ILLEGAL_REQUEST,
INVALID_FIELD_IN_CDB, 0);
return check_condition_result;
}
} else {
mk_sense_buffer(scp, ILLEGAL_REQUEST,
INVALID_FIELD_IN_CDB, 0);
return check_condition_result;
}
len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
return fill_from_dev_buffer(scp, arr,
min(len, SDEBUG_MAX_INQ_ARR_SZ));
}
static int check_device_access_params(struct scsi_cmnd *scp,
unsigned long long lba, unsigned int num)
{
if (lba + num > sdebug_capacity) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE, 0);
return check_condition_result;
}
/* transfer length excessive (tie in to block limits VPD page) */
if (num > sdebug_store_sectors) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
return check_condition_result;
}
return 0;
}
/* Returns number of bytes copied or -1 if error. */
static int do_device_access(struct scsi_cmnd *scmd,
unsigned long long lba, unsigned int num, int write)
{
int ret;
unsigned long long block, rest = 0;
struct scsi_data_buffer *sdb;
enum dma_data_direction dir;
size_t (*func)(struct scatterlist *, unsigned int, void *, size_t,
off_t);
if (write) {
sdb = scsi_out(scmd);
dir = DMA_TO_DEVICE;
func = sg_pcopy_to_buffer;
} else {
sdb = scsi_in(scmd);
dir = DMA_FROM_DEVICE;
func = sg_pcopy_from_buffer;
}
if (!sdb->length)
return 0;
if (!(scsi_bidi_cmnd(scmd) || scmd->sc_data_direction == dir))
return -1;
block = do_div(lba, sdebug_store_sectors);
if (block + num > sdebug_store_sectors)
rest = block + num - sdebug_store_sectors;
ret = func(sdb->table.sgl, sdb->table.nents,
fake_storep + (block * scsi_debug_sector_size),
(num - rest) * scsi_debug_sector_size, 0);
if (ret != (num - rest) * scsi_debug_sector_size)
return ret;
if (rest) {
ret += func(sdb->table.sgl, sdb->table.nents,
fake_storep, rest * scsi_debug_sector_size,
(num - rest) * scsi_debug_sector_size);
}
return ret;
}
static __be16 dif_compute_csum(const void *buf, int len)
{
__be16 csum;
if (scsi_debug_guard)
csum = (__force __be16)ip_compute_csum(buf, len);
else
csum = cpu_to_be16(crc_t10dif(buf, len));
return csum;
}
static int dif_verify(struct sd_dif_tuple *sdt, const void *data,
sector_t sector, u32 ei_lba)
{
__be16 csum = dif_compute_csum(data, scsi_debug_sector_size);
if (sdt->guard_tag != csum) {
pr_err("%s: GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
__func__,
(unsigned long)sector,
be16_to_cpu(sdt->guard_tag),
be16_to_cpu(csum));
return 0x01;
}
if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
pr_err("%s: REF check failed on sector %lu\n",
__func__, (unsigned long)sector);
return 0x03;
}
if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
be32_to_cpu(sdt->ref_tag) != ei_lba) {
pr_err("%s: REF check failed on sector %lu\n",
__func__, (unsigned long)sector);
return 0x03;
}
return 0;
}
static void dif_copy_prot(struct scsi_cmnd *SCpnt, sector_t sector,
unsigned int sectors, bool read)
{
size_t resid;
void *paddr;
const void *dif_store_end = dif_storep + sdebug_store_sectors;
struct sg_mapping_iter miter;
/* Bytes of protection data to copy into sgl */
resid = sectors * sizeof(*dif_storep);
sg_miter_start(&miter, scsi_prot_sglist(SCpnt),
scsi_prot_sg_count(SCpnt), SG_MITER_ATOMIC |
(read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
while (sg_miter_next(&miter) && resid > 0) {
size_t len = min(miter.length, resid);
void *start = dif_store(sector);
size_t rest = 0;
if (dif_store_end < start + len)
rest = start + len - dif_store_end;
paddr = miter.addr;
if (read)
memcpy(paddr, start, len - rest);
else
memcpy(start, paddr, len - rest);
if (rest) {
if (read)
memcpy(paddr + len - rest, dif_storep, rest);
else
memcpy(dif_storep, paddr + len - rest, rest);
}
sector += len / sizeof(*dif_storep);
resid -= len;
}
sg_miter_stop(&miter);
}
static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
unsigned int sectors, u32 ei_lba)
{
unsigned int i;
struct sd_dif_tuple *sdt;
sector_t sector;
for (i = 0; i < sectors; i++, ei_lba++) {
int ret;
sector = start_sec + i;
sdt = dif_store(sector);
if (sdt->app_tag == cpu_to_be16(0xffff))
continue;
ret = dif_verify(sdt, fake_store(sector), sector, ei_lba);
if (ret) {
dif_errors++;
return ret;
}
}
dif_copy_prot(SCpnt, start_sec, sectors, true);
dix_reads++;
return 0;
}
static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba,
unsigned int num, u32 ei_lba)
{
unsigned long iflags;
int ret;
ret = check_device_access_params(SCpnt, lba, num);
if (ret)
return ret;
if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
(lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) &&
((lba + num) > OPT_MEDIUM_ERR_ADDR)) {
/* claim unrecoverable read error */
mk_sense_buffer(SCpnt, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
/* set info field and valid bit for fixed descriptor */
if (0x70 == (SCpnt->sense_buffer[0] & 0x7f)) {
SCpnt->sense_buffer[0] |= 0x80; /* Valid bit */
ret = (lba < OPT_MEDIUM_ERR_ADDR)
? OPT_MEDIUM_ERR_ADDR : (int)lba;
SCpnt->sense_buffer[3] = (ret >> 24) & 0xff;
SCpnt->sense_buffer[4] = (ret >> 16) & 0xff;
SCpnt->sense_buffer[5] = (ret >> 8) & 0xff;
SCpnt->sense_buffer[6] = ret & 0xff;
}
scsi_set_resid(SCpnt, scsi_bufflen(SCpnt));
return check_condition_result;
}
read_lock_irqsave(&atomic_rw, iflags);
/* DIX + T10 DIF */
if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
int prot_ret = prot_verify_read(SCpnt, lba, num, ei_lba);
if (prot_ret) {
read_unlock_irqrestore(&atomic_rw, iflags);
mk_sense_buffer(SCpnt, ABORTED_COMMAND, 0x10, prot_ret);
return illegal_condition_result;
}
}
ret = do_device_access(SCpnt, lba, num, 0);
read_unlock_irqrestore(&atomic_rw, iflags);
if (ret == -1)
return DID_ERROR << 16;
scsi_in(SCpnt)->resid = scsi_bufflen(SCpnt) - ret;
return 0;
}
void dump_sector(unsigned char *buf, int len)
{
int i, j, n;
pr_err(">>> Sector Dump <<<\n");
for (i = 0 ; i < len ; i += 16) {
char b[128];
for (j = 0, n = 0; j < 16; j++) {
unsigned char c = buf[i+j];
if (c >= 0x20 && c < 0x7e)
n += scnprintf(b + n, sizeof(b) - n,
" %c ", buf[i+j]);
else
n += scnprintf(b + n, sizeof(b) - n,
"%02x ", buf[i+j]);
}
pr_err("%04d: %s\n", i, b);
}
}
static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
unsigned int sectors, u32 ei_lba)
{
int ret;
struct sd_dif_tuple *sdt;
void *daddr;
sector_t sector = start_sec;
int ppage_offset;
int dpage_offset;
struct sg_mapping_iter diter;
struct sg_mapping_iter piter;
BUG_ON(scsi_sg_count(SCpnt) == 0);
BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
scsi_prot_sg_count(SCpnt),
SG_MITER_ATOMIC | SG_MITER_FROM_SG);
sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
SG_MITER_ATOMIC | SG_MITER_FROM_SG);
/* For each protection page */
while (sg_miter_next(&piter)) {
dpage_offset = 0;
if (WARN_ON(!sg_miter_next(&diter))) {
ret = 0x01;
goto out;
}
for (ppage_offset = 0; ppage_offset < piter.length;
ppage_offset += sizeof(struct sd_dif_tuple)) {
/* If we're at the end of the current
* data page advance to the next one
*/
if (dpage_offset >= diter.length) {
if (WARN_ON(!sg_miter_next(&diter))) {
ret = 0x01;
goto out;
}
dpage_offset = 0;
}
sdt = piter.addr + ppage_offset;
daddr = diter.addr + dpage_offset;
ret = dif_verify(sdt, daddr, sector, ei_lba);
if (ret) {
dump_sector(daddr, scsi_debug_sector_size);
goto out;
}
sector++;
ei_lba++;
dpage_offset += scsi_debug_sector_size;
}
diter.consumed = dpage_offset;
sg_miter_stop(&diter);
}
sg_miter_stop(&piter);
dif_copy_prot(SCpnt, start_sec, sectors, false);
dix_writes++;
return 0;
out:
dif_errors++;
sg_miter_stop(&diter);
sg_miter_stop(&piter);
return ret;
}
static unsigned long lba_to_map_index(sector_t lba)
{
if (scsi_debug_unmap_alignment) {
lba += scsi_debug_unmap_granularity -
scsi_debug_unmap_alignment;
}
do_div(lba, scsi_debug_unmap_granularity);
return lba;
}
static sector_t map_index_to_lba(unsigned long index)
{
sector_t lba = index * scsi_debug_unmap_granularity;
if (scsi_debug_unmap_alignment) {
lba -= scsi_debug_unmap_granularity -
scsi_debug_unmap_alignment;
}
return lba;
}
static unsigned int map_state(sector_t lba, unsigned int *num)
{
sector_t end;
unsigned int mapped;
unsigned long index;
unsigned long next;
index = lba_to_map_index(lba);
mapped = test_bit(index, map_storep);
if (mapped)
next = find_next_zero_bit(map_storep, map_size, index);
else
next = find_next_bit(map_storep, map_size, index);
end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
*num = end - lba;
return mapped;
}
static void map_region(sector_t lba, unsigned int len)
{
sector_t end = lba + len;
while (lba < end) {
unsigned long index = lba_to_map_index(lba);
if (index < map_size)
set_bit(index, map_storep);
lba = map_index_to_lba(index + 1);
}
}
static void unmap_region(sector_t lba, unsigned int len)
{
sector_t end = lba + len;
while (lba < end) {
unsigned long index = lba_to_map_index(lba);
if (lba == map_index_to_lba(index) &&
lba + scsi_debug_unmap_granularity <= end &&
index < map_size) {
clear_bit(index, map_storep);
if (scsi_debug_lbprz) {
memset(fake_storep +
lba * scsi_debug_sector_size, 0,
scsi_debug_sector_size *
scsi_debug_unmap_granularity);
}
if (dif_storep) {
memset(dif_storep + lba, 0xff,
sizeof(*dif_storep) *
scsi_debug_unmap_granularity);
}
}
lba = map_index_to_lba(index + 1);
}
}
static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba,
unsigned int num, u32 ei_lba)
{
unsigned long iflags;
int ret;
ret = check_device_access_params(SCpnt, lba, num);
if (ret)
return ret;
write_lock_irqsave(&atomic_rw, iflags);
/* DIX + T10 DIF */
if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
int prot_ret = prot_verify_write(SCpnt, lba, num, ei_lba);
if (prot_ret) {
write_unlock_irqrestore(&atomic_rw, iflags);
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, 0x10,
prot_ret);
return illegal_condition_result;
}
}
ret = do_device_access(SCpnt, lba, num, 1);
if (scsi_debug_lbp())
map_region(lba, num);
write_unlock_irqrestore(&atomic_rw, iflags);
if (-1 == ret)
return (DID_ERROR << 16);
else if ((ret < (num * scsi_debug_sector_size)) &&
(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
sdev_printk(KERN_INFO, SCpnt->device,
"%s: write: cdb indicated=%u, IO sent=%d bytes\n",
my_name, num * scsi_debug_sector_size, ret);
return 0;
}
static int resp_write_same(struct scsi_cmnd *scmd, unsigned long long lba,
unsigned int num, u32 ei_lba, unsigned int unmap)
{
unsigned long iflags;
unsigned long long i;
int ret;
ret = check_device_access_params(scmd, lba, num);
if (ret)
return ret;
if (num > scsi_debug_write_same_length) {
mk_sense_buffer(scmd, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
0);
return check_condition_result;
}
write_lock_irqsave(&atomic_rw, iflags);
if (unmap && scsi_debug_lbp()) {
unmap_region(lba, num);
goto out;
}
/* Else fetch one logical block */
ret = fetch_to_dev_buffer(scmd,
fake_storep + (lba * scsi_debug_sector_size),
scsi_debug_sector_size);
if (-1 == ret) {
write_unlock_irqrestore(&atomic_rw, iflags);
return (DID_ERROR << 16);
} else if ((ret < (num * scsi_debug_sector_size)) &&
(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
sdev_printk(KERN_INFO, scmd->device,
"%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
my_name, "write same",
num * scsi_debug_sector_size, ret);
/* Copy first sector to remaining blocks */
for (i = 1 ; i < num ; i++)
memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size),
fake_storep + (lba * scsi_debug_sector_size),
scsi_debug_sector_size);
if (scsi_debug_lbp())
map_region(lba, num);
out:
write_unlock_irqrestore(&atomic_rw, iflags);
return 0;
}
struct unmap_block_desc {
__be64 lba;
__be32 blocks;
__be32 __reserved;
};
static int resp_unmap(struct scsi_cmnd * scmd, struct sdebug_dev_info * devip)
{
unsigned char *buf;
struct unmap_block_desc *desc;
unsigned int i, payload_len, descriptors;
int ret;
unsigned long iflags;
ret = check_readiness(scmd, UAS_ONLY, devip);
if (ret)
return ret;
payload_len = get_unaligned_be16(&scmd->cmnd[7]);
BUG_ON(scsi_bufflen(scmd) != payload_len);
descriptors = (payload_len - 8) / 16;
buf = kmalloc(scsi_bufflen(scmd), GFP_ATOMIC);
if (!buf)
return check_condition_result;
scsi_sg_copy_to_buffer(scmd, buf, scsi_bufflen(scmd));
BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
desc = (void *)&buf[8];
write_lock_irqsave(&atomic_rw, iflags);
for (i = 0 ; i < descriptors ; i++) {
unsigned long long lba = get_unaligned_be64(&desc[i].lba);
unsigned int num = get_unaligned_be32(&desc[i].blocks);
ret = check_device_access_params(scmd, lba, num);
if (ret)
goto out;
unmap_region(lba, num);
}
ret = 0;
out:
write_unlock_irqrestore(&atomic_rw, iflags);
kfree(buf);
return ret;
}
#define SDEBUG_GET_LBA_STATUS_LEN 32
static int resp_get_lba_status(struct scsi_cmnd * scmd,
struct sdebug_dev_info * devip)
{
unsigned long long lba;
unsigned int alloc_len, mapped, num;
unsigned char arr[SDEBUG_GET_LBA_STATUS_LEN];
int ret;
ret = check_readiness(scmd, UAS_ONLY, devip);
if (ret)
return ret;
lba = get_unaligned_be64(&scmd->cmnd[2]);
alloc_len = get_unaligned_be32(&scmd->cmnd[10]);
if (alloc_len < 24)
return 0;
ret = check_device_access_params(scmd, lba, 1);
if (ret)
return ret;
mapped = map_state(lba, &num);
memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
put_unaligned_be32(20, &arr[0]); /* Parameter Data Length */
put_unaligned_be64(lba, &arr[8]); /* LBA */
put_unaligned_be32(num, &arr[16]); /* Number of blocks */
arr[20] = !mapped; /* mapped = 0, unmapped = 1 */
return fill_from_dev_buffer(scmd, arr, SDEBUG_GET_LBA_STATUS_LEN);
}
#define SDEBUG_RLUN_ARR_SZ 256
static int resp_report_luns(struct scsi_cmnd * scp,
struct sdebug_dev_info * devip)
{
unsigned int alloc_len;
int lun_cnt, i, upper, num, n;
u64 wlun, lun;
unsigned char *cmd = scp->cmnd;
int select_report = (int)cmd[2];
struct scsi_lun *one_lun;
unsigned char arr[SDEBUG_RLUN_ARR_SZ];
unsigned char * max_addr;
alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
if ((alloc_len < 4) || (select_report > 2)) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
0);
return check_condition_result;
}
/* can produce response with up to 16k luns (lun 0 to lun 16383) */
memset(arr, 0, SDEBUG_RLUN_ARR_SZ);
lun_cnt = scsi_debug_max_luns;
if (1 == select_report)
lun_cnt = 0;
else if (scsi_debug_no_lun_0 && (lun_cnt > 0))
--lun_cnt;
wlun = (select_report > 0) ? 1 : 0;
num = lun_cnt + wlun;
arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff;
arr[3] = (sizeof(struct scsi_lun) * num) & 0xff;
n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
sizeof(struct scsi_lun)), num);
if (n < num) {
wlun = 0;
lun_cnt = n;
}
one_lun = (struct scsi_lun *) &arr[8];
max_addr = arr + SDEBUG_RLUN_ARR_SZ;
for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0);
((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr));
i++, lun++) {
upper = (lun >> 8) & 0x3f;
if (upper)
one_lun[i].scsi_lun[0] =
(upper | (SAM2_LUN_ADDRESS_METHOD << 6));
one_lun[i].scsi_lun[1] = lun & 0xff;
}
if (wlun) {
one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff;
one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff;
i++;
}
alloc_len = (unsigned char *)(one_lun + i) - arr;
return fill_from_dev_buffer(scp, arr,
min((int)alloc_len, SDEBUG_RLUN_ARR_SZ));
}
static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
unsigned int num, struct sdebug_dev_info *devip)
{
int j;
unsigned char *kaddr, *buf;
unsigned int offset;
struct scsi_data_buffer *sdb = scsi_in(scp);
struct sg_mapping_iter miter;
/* better not to use temporary buffer. */
buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
if (!buf) {
mk_sense_buffer(scp, NOT_READY,
LOGICAL_UNIT_COMMUNICATION_FAILURE, 0);
return check_condition_result;
}
scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
offset = 0;
sg_miter_start(&miter, sdb->table.sgl, sdb->table.nents,
SG_MITER_ATOMIC | SG_MITER_TO_SG);
while (sg_miter_next(&miter)) {
kaddr = miter.addr;
for (j = 0; j < miter.length; j++)
*(kaddr + j) ^= *(buf + offset + j);
offset += miter.length;
}
sg_miter_stop(&miter);
kfree(buf);
return 0;
}
/* When timer or tasklet goes off this function is called. */
static void sdebug_q_cmd_complete(unsigned long indx)
{
int qa_indx;
int retiring = 0;
unsigned long iflags;
struct sdebug_queued_cmd *sqcp;
struct scsi_cmnd *scp;
struct sdebug_dev_info *devip;
atomic_inc(&sdebug_completions);
qa_indx = indx;
if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) {
pr_err("%s: wild qa_indx=%d\n", __func__, qa_indx);
return;
}
spin_lock_irqsave(&queued_arr_lock, iflags);
sqcp = &queued_arr[qa_indx];
scp = sqcp->a_cmnd;
if (NULL == scp) {
spin_unlock_irqrestore(&queued_arr_lock, iflags);
pr_err("%s: scp is NULL\n", __func__);
return;
}
devip = (struct sdebug_dev_info *)scp->device->hostdata;
if (devip)
atomic_dec(&devip->num_in_q);
else
pr_err("%s: devip=NULL\n", __func__);
if (atomic_read(&retired_max_queue) > 0)
retiring = 1;
sqcp->a_cmnd = NULL;
if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) {
spin_unlock_irqrestore(&queued_arr_lock, iflags);
pr_err("%s: Unexpected completion\n", __func__);
return;
}
if (unlikely(retiring)) { /* user has reduced max_queue */
int k, retval;
retval = atomic_read(&retired_max_queue);
if (qa_indx >= retval) {
spin_unlock_irqrestore(&queued_arr_lock, iflags);
pr_err("%s: index %d too large\n", __func__, retval);
return;
}
k = find_last_bit(queued_in_use_bm, retval);
if ((k < scsi_debug_max_queue) || (k == retval))
atomic_set(&retired_max_queue, 0);
else
atomic_set(&retired_max_queue, k + 1);
}
spin_unlock_irqrestore(&queued_arr_lock, iflags);
scp->scsi_done(scp); /* callback to mid level */
}
/* When high resolution timer goes off this function is called. */
static enum hrtimer_restart
sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
{
int qa_indx;
int retiring = 0;
unsigned long iflags;
struct sdebug_hrtimer *sd_hrtp = (struct sdebug_hrtimer *)timer;
struct sdebug_queued_cmd *sqcp;
struct scsi_cmnd *scp;
struct sdebug_dev_info *devip;
atomic_inc(&sdebug_completions);
qa_indx = sd_hrtp->qa_indx;
if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) {
pr_err("%s: wild qa_indx=%d\n", __func__, qa_indx);
goto the_end;
}
spin_lock_irqsave(&queued_arr_lock, iflags);
sqcp = &queued_arr[qa_indx];
scp = sqcp->a_cmnd;
if (NULL == scp) {
spin_unlock_irqrestore(&queued_arr_lock, iflags);
pr_err("%s: scp is NULL\n", __func__);
goto the_end;
}
devip = (struct sdebug_dev_info *)scp->device->hostdata;
if (devip)
atomic_dec(&devip->num_in_q);
else
pr_err("%s: devip=NULL\n", __func__);
if (atomic_read(&retired_max_queue) > 0)
retiring = 1;
sqcp->a_cmnd = NULL;
if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) {
spin_unlock_irqrestore(&queued_arr_lock, iflags);
pr_err("%s: Unexpected completion\n", __func__);
goto the_end;
}
if (unlikely(retiring)) { /* user has reduced max_queue */
int k, retval;
retval = atomic_read(&retired_max_queue);
if (qa_indx >= retval) {
spin_unlock_irqrestore(&queued_arr_lock, iflags);
pr_err("%s: index %d too large\n", __func__, retval);
goto the_end;
}
k = find_last_bit(queued_in_use_bm, retval);
if ((k < scsi_debug_max_queue) || (k == retval))
atomic_set(&retired_max_queue, 0);
else
atomic_set(&retired_max_queue, k + 1);
}
spin_unlock_irqrestore(&queued_arr_lock, iflags);
scp->scsi_done(scp); /* callback to mid level */
the_end:
return HRTIMER_NORESTART;
}
static struct sdebug_dev_info *
sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags)
{
struct sdebug_dev_info *devip;
devip = kzalloc(sizeof(*devip), flags);
if (devip) {
devip->sdbg_host = sdbg_host;
list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
}
return devip;
}
static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev)
{
struct sdebug_host_info * sdbg_host;
struct sdebug_dev_info * open_devip = NULL;
struct sdebug_dev_info * devip =
(struct sdebug_dev_info *)sdev->hostdata;
if (devip)
return devip;
sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
if (!sdbg_host) {
pr_err("%s: Host info NULL\n", __func__);
return NULL;
}
list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
if ((devip->used) && (devip->channel == sdev->channel) &&
(devip->target == sdev->id) &&
(devip->lun == sdev->lun))
return devip;
else {
if ((!devip->used) && (!open_devip))
open_devip = devip;
}
}
if (!open_devip) { /* try and make a new one */
open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
if (!open_devip) {
printk(KERN_ERR "%s: out of memory at line %d\n",
__func__, __LINE__);
return NULL;
}
}
open_devip->channel = sdev->channel;
open_devip->target = sdev->id;
open_devip->lun = sdev->lun;
open_devip->sdbg_host = sdbg_host;
atomic_set(&open_devip->num_in_q, 0);
set_bit(SDEBUG_UA_POR, open_devip->uas_bm);
open_devip->used = 1;
if (sdev->lun == SAM2_WLUN_REPORT_LUNS)
open_devip->wlun = SAM2_WLUN_REPORT_LUNS & 0xff;
return open_devip;
}
static int scsi_debug_slave_alloc(struct scsi_device *sdp)
{
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %llu>\n",
sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
return 0;
}
static int scsi_debug_slave_configure(struct scsi_device *sdp)
{
struct sdebug_dev_info *devip;
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %llu>\n",
sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN)
sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN;
devip = devInfoReg(sdp);
if (NULL == devip)
return 1; /* no resources, will be marked offline */
sdp->hostdata = devip;
sdp->tagged_supported = 1;
if (sdp->host->cmd_per_lun)
scsi_adjust_queue_depth(sdp, DEF_TAGGED_QUEUING,
DEF_CMD_PER_LUN);
blk_queue_max_segment_size(sdp->request_queue, -1U);
if (scsi_debug_no_uld)
sdp->no_uld_attach = 1;
return 0;
}
static void scsi_debug_slave_destroy(struct scsi_device *sdp)
{
struct sdebug_dev_info *devip =
(struct sdebug_dev_info *)sdp->hostdata;
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %llu>\n",
sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
if (devip) {
/* make this slot available for re-use */
devip->used = 0;
sdp->hostdata = NULL;
}
}
/* Returns 1 if cmnd found (deletes its timer or tasklet), else returns 0 */
static int stop_queued_cmnd(struct scsi_cmnd *cmnd)
{
unsigned long iflags;
int k, qmax, r_qmax;
struct sdebug_queued_cmd *sqcp;
struct sdebug_dev_info *devip;
spin_lock_irqsave(&queued_arr_lock, iflags);
qmax = scsi_debug_max_queue;
r_qmax = atomic_read(&retired_max_queue);
if (r_qmax > qmax)
qmax = r_qmax;
for (k = 0; k < qmax; ++k) {
if (test_bit(k, queued_in_use_bm)) {
sqcp = &queued_arr[k];
if (cmnd == sqcp->a_cmnd) {
devip = (struct sdebug_dev_info *)
cmnd->device->hostdata;
if (devip)
atomic_dec(&devip->num_in_q);
sqcp->a_cmnd = NULL;
spin_unlock_irqrestore(&queued_arr_lock,
iflags);
if (scsi_debug_ndelay > 0) {
if (sqcp->sd_hrtp)
hrtimer_cancel(
&sqcp->sd_hrtp->hrt);
} else if (scsi_debug_delay > 0) {
if (sqcp->cmnd_timerp)
del_timer_sync(
sqcp->cmnd_timerp);
} else if (scsi_debug_delay < 0) {
if (sqcp->tletp)
tasklet_kill(sqcp->tletp);
}
clear_bit(k, queued_in_use_bm);
return 1;
}
}
}
spin_unlock_irqrestore(&queued_arr_lock, iflags);
return 0;
}
/* Deletes (stops) timers or tasklets of all queued commands */
static void stop_all_queued(void)
{
unsigned long iflags;
int k;
struct sdebug_queued_cmd *sqcp;
struct sdebug_dev_info *devip;
spin_lock_irqsave(&queued_arr_lock, iflags);
for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
if (test_bit(k, queued_in_use_bm)) {
sqcp = &queued_arr[k];
if (sqcp->a_cmnd) {
devip = (struct sdebug_dev_info *)
sqcp->a_cmnd->device->hostdata;
if (devip)
atomic_dec(&devip->num_in_q);
sqcp->a_cmnd = NULL;
spin_unlock_irqrestore(&queued_arr_lock,
iflags);
if (scsi_debug_ndelay > 0) {
if (sqcp->sd_hrtp)
hrtimer_cancel(
&sqcp->sd_hrtp->hrt);
} else if (scsi_debug_delay > 0) {
if (sqcp->cmnd_timerp)
del_timer_sync(
sqcp->cmnd_timerp);
} else if (scsi_debug_delay < 0) {
if (sqcp->tletp)
tasklet_kill(sqcp->tletp);
}
clear_bit(k, queued_in_use_bm);
spin_lock_irqsave(&queued_arr_lock, iflags);
}
}
}
spin_unlock_irqrestore(&queued_arr_lock, iflags);
}
/* Free queued command memory on heap */
static void free_all_queued(void)
{
unsigned long iflags;
int k;
struct sdebug_queued_cmd *sqcp;
spin_lock_irqsave(&queued_arr_lock, iflags);
for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
sqcp = &queued_arr[k];
kfree(sqcp->cmnd_timerp);
sqcp->cmnd_timerp = NULL;
kfree(sqcp->tletp);
sqcp->tletp = NULL;
kfree(sqcp->sd_hrtp);
sqcp->sd_hrtp = NULL;
}
spin_unlock_irqrestore(&queued_arr_lock, iflags);
}
static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
{
++num_aborts;
if (SCpnt) {
if (SCpnt->device &&
(SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts))
sdev_printk(KERN_INFO, SCpnt->device, "%s\n",
__func__);
stop_queued_cmnd(SCpnt);
}
return SUCCESS;
}
static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
{
struct sdebug_dev_info * devip;
++num_dev_resets;
if (SCpnt && SCpnt->device) {
struct scsi_device *sdp = SCpnt->device;
if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
devip = devInfoReg(sdp);
if (devip)
set_bit(SDEBUG_UA_POR, devip->uas_bm);
}
return SUCCESS;
}
static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
{
struct sdebug_host_info *sdbg_host;
struct sdebug_dev_info *devip;
struct scsi_device *sdp;
struct Scsi_Host *hp;
int k = 0;
++num_target_resets;
if (!SCpnt)
goto lie;
sdp = SCpnt->device;
if (!sdp)
goto lie;
if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
hp = sdp->host;
if (!hp)
goto lie;
sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
if (sdbg_host) {
list_for_each_entry(devip,
&sdbg_host->dev_info_list,
dev_list)
if (devip->target == sdp->id) {
set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
++k;
}
}
if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
sdev_printk(KERN_INFO, sdp,
"%s: %d device(s) found in target\n", __func__, k);
lie:
return SUCCESS;
}
static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
{
struct sdebug_host_info *sdbg_host;
struct sdebug_dev_info *devip;
struct scsi_device * sdp;
struct Scsi_Host * hp;
int k = 0;
++num_bus_resets;
if (!(SCpnt && SCpnt->device))
goto lie;
sdp = SCpnt->device;
if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
hp = sdp->host;
if (hp) {
sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
if (sdbg_host) {
list_for_each_entry(devip,
&sdbg_host->dev_info_list,
dev_list) {
set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
++k;
}
}
}
if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
sdev_printk(KERN_INFO, sdp,
"%s: %d device(s) found in host\n", __func__, k);
lie:
return SUCCESS;
}
static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
{
struct sdebug_host_info * sdbg_host;
struct sdebug_dev_info *devip;
int k = 0;
++num_host_resets;
if ((SCpnt->device) && (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts))
sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
spin_lock(&sdebug_host_list_lock);
list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
list_for_each_entry(devip, &sdbg_host->dev_info_list,
dev_list) {
set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
++k;
}
}
spin_unlock(&sdebug_host_list_lock);
stop_all_queued();
if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
sdev_printk(KERN_INFO, SCpnt->device,
"%s: %d device(s) found\n", __func__, k);
return SUCCESS;
}
static void __init sdebug_build_parts(unsigned char *ramp,
unsigned long store_size)
{
struct partition * pp;
int starts[SDEBUG_MAX_PARTS + 2];
int sectors_per_part, num_sectors, k;
int heads_by_sects, start_sec, end_sec;
/* assume partition table already zeroed */
if ((scsi_debug_num_parts < 1) || (store_size < 1048576))
return;
if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) {
scsi_debug_num_parts = SDEBUG_MAX_PARTS;
pr_warn("%s: reducing partitions to %d\n", __func__,
SDEBUG_MAX_PARTS);
}
num_sectors = (int)sdebug_store_sectors;
sectors_per_part = (num_sectors - sdebug_sectors_per)
/ scsi_debug_num_parts;
heads_by_sects = sdebug_heads * sdebug_sectors_per;
starts[0] = sdebug_sectors_per;
for (k = 1; k < scsi_debug_num_parts; ++k)
starts[k] = ((k * sectors_per_part) / heads_by_sects)
* heads_by_sects;
starts[scsi_debug_num_parts] = num_sectors;
starts[scsi_debug_num_parts + 1] = 0;
ramp[510] = 0x55; /* magic partition markings */
ramp[511] = 0xAA;
pp = (struct partition *)(ramp + 0x1be);
for (k = 0; starts[k + 1]; ++k, ++pp) {
start_sec = starts[k];
end_sec = starts[k + 1] - 1;
pp->boot_ind = 0;
pp->cyl = start_sec / heads_by_sects;
pp->head = (start_sec - (pp->cyl * heads_by_sects))
/ sdebug_sectors_per;
pp->sector = (start_sec % sdebug_sectors_per) + 1;
pp->end_cyl = end_sec / heads_by_sects;
pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
/ sdebug_sectors_per;
pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
pp->start_sect = cpu_to_le32(start_sec);
pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
pp->sys_ind = 0x83; /* plain Linux partition */
}
}
static int
schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
int scsi_result, int delta_jiff)
{
unsigned long iflags;
int k, num_in_q, qdepth, inject;
struct sdebug_queued_cmd *sqcp = NULL;
struct scsi_device *sdp = cmnd->device;
if (NULL == cmnd || NULL == devip) {
pr_warn("%s: called with NULL cmnd or devip pointer\n",
__func__);
/* no particularly good error to report back */
return SCSI_MLQUEUE_HOST_BUSY;
}
if ((scsi_result) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
__func__, scsi_result);
if (delta_jiff == 0)
goto respond_in_thread;
/* schedule the response at a later time if resources permit */
spin_lock_irqsave(&queued_arr_lock, iflags);
num_in_q = atomic_read(&devip->num_in_q);
qdepth = cmnd->device->queue_depth;
inject = 0;
if ((qdepth > 0) && (num_in_q >= qdepth)) {
if (scsi_result) {
spin_unlock_irqrestore(&queued_arr_lock, iflags);
goto respond_in_thread;
} else
scsi_result = device_qfull_result;
} else if ((scsi_debug_every_nth != 0) &&
(SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) &&
(scsi_result == 0)) {
if ((num_in_q == (qdepth - 1)) &&
(atomic_inc_return(&sdebug_a_tsf) >=
abs(scsi_debug_every_nth))) {
atomic_set(&sdebug_a_tsf, 0);
inject = 1;
scsi_result = device_qfull_result;
}
}
k = find_first_zero_bit(queued_in_use_bm, scsi_debug_max_queue);
if (k >= scsi_debug_max_queue) {
spin_unlock_irqrestore(&queued_arr_lock, iflags);
if (scsi_result)
goto respond_in_thread;
else if (SCSI_DEBUG_OPT_ALL_TSF & scsi_debug_opts)
scsi_result = device_qfull_result;
if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts)
sdev_printk(KERN_INFO, sdp,
"%s: max_queue=%d exceeded, %s\n",
__func__, scsi_debug_max_queue,
(scsi_result ? "status: TASK SET FULL" :
"report: host busy"));
if (scsi_result)
goto respond_in_thread;
else
return SCSI_MLQUEUE_HOST_BUSY;
}
__set_bit(k, queued_in_use_bm);
atomic_inc(&devip->num_in_q);
sqcp = &queued_arr[k];
sqcp->a_cmnd = cmnd;
cmnd->result = scsi_result;
spin_unlock_irqrestore(&queued_arr_lock, iflags);
if (delta_jiff > 0) {
if (NULL == sqcp->cmnd_timerp) {
sqcp->cmnd_timerp = kmalloc(sizeof(struct timer_list),
GFP_ATOMIC);
if (NULL == sqcp->cmnd_timerp)
return SCSI_MLQUEUE_HOST_BUSY;
init_timer(sqcp->cmnd_timerp);
}
sqcp->cmnd_timerp->function = sdebug_q_cmd_complete;
sqcp->cmnd_timerp->data = k;
sqcp->cmnd_timerp->expires = get_jiffies_64() + delta_jiff;
add_timer(sqcp->cmnd_timerp);
} else if (scsi_debug_ndelay > 0) {
ktime_t kt = ktime_set(0, scsi_debug_ndelay);
struct sdebug_hrtimer *sd_hp = sqcp->sd_hrtp;
if (NULL == sd_hp) {
sd_hp = kmalloc(sizeof(*sd_hp), GFP_ATOMIC);
if (NULL == sd_hp)
return SCSI_MLQUEUE_HOST_BUSY;
sqcp->sd_hrtp = sd_hp;
hrtimer_init(&sd_hp->hrt, CLOCK_MONOTONIC,
HRTIMER_MODE_REL);
sd_hp->hrt.function = sdebug_q_cmd_hrt_complete;
sd_hp->qa_indx = k;
}
hrtimer_start(&sd_hp->hrt, kt, HRTIMER_MODE_REL);
} else { /* delay < 0 */
if (NULL == sqcp->tletp) {
sqcp->tletp = kmalloc(sizeof(*sqcp->tletp),
GFP_ATOMIC);
if (NULL == sqcp->tletp)
return SCSI_MLQUEUE_HOST_BUSY;
tasklet_init(sqcp->tletp,
sdebug_q_cmd_complete, k);
}
if (-1 == delta_jiff)
tasklet_hi_schedule(sqcp->tletp);
else
tasklet_schedule(sqcp->tletp);
}
if ((SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) &&
(scsi_result == device_qfull_result))
sdev_printk(KERN_INFO, sdp,
"%s: num_in_q=%d +1, %s%s\n", __func__,
num_in_q, (inject ? "<inject> " : ""),
"status: TASK SET FULL");
return 0;
respond_in_thread: /* call back to mid-layer using invocation thread */
cmnd->result = scsi_result;
cmnd->scsi_done(cmnd);
return 0;
}
/* Note: The following macros create attribute files in the
/sys/module/scsi_debug/parameters directory. Unfortunately this
driver is unaware of a change and cannot trigger auxiliary actions
as it can when the corresponding attribute in the
/sys/bus/pseudo/drivers/scsi_debug directory is changed.
*/
module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
module_param_named(clustering, scsi_debug_clustering, bool, S_IRUGO | S_IWUSR);
module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
module_param_named(dix, scsi_debug_dix, int, S_IRUGO);
module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR);
module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR);
module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR);
module_param_named(guard, scsi_debug_guard, uint, S_IRUGO);
module_param_named(host_lock, scsi_debug_host_lock, bool, S_IRUGO | S_IWUSR);
module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO);
module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO);
module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO);
module_param_named(lbprz, scsi_debug_lbprz, int, S_IRUGO);
module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO);
module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR);
module_param_named(ndelay, scsi_debug_ndelay, int, S_IRUGO | S_IWUSR);
module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO);
module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO);
module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR);
module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO);
module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO);
module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
module_param_named(removable, scsi_debug_removable, bool, S_IRUGO | S_IWUSR);
module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO);
module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO);
module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO);
module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO);
module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO);
module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
S_IRUGO | S_IWUSR);
module_param_named(write_same_length, scsi_debug_write_same_length, int,
S_IRUGO | S_IWUSR);
MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
MODULE_DESCRIPTION("SCSI debug adapter driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(SCSI_DEBUG_VERSION);
MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs(def=8)");
MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
MODULE_PARM_DESC(host_lock, "use host_lock around all commands (def=0)");
MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
MODULE_PARM_DESC(lbprz, "unmapped blocks return 0 on read (def=1)");
MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
MODULE_PARM_DESC(opt_blks, "optimal transfer length in block (def=64)");
MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=6[SPC-4])");
MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)");
MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
static char sdebug_info[256];
static const char * scsi_debug_info(struct Scsi_Host * shp)
{
sprintf(sdebug_info, "scsi_debug, version %s [%s], "
"dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION,
scsi_debug_version_date, scsi_debug_dev_size_mb,
scsi_debug_opts);
return sdebug_info;
}
/* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, int length)
{
char arr[16];
int opts;
int minLen = length > 15 ? 15 : length;
if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
return -EACCES;
memcpy(arr, buffer, minLen);
arr[minLen] = '\0';
if (1 != sscanf(arr, "%d", &opts))
return -EINVAL;
scsi_debug_opts = opts;
if (scsi_debug_every_nth != 0)
atomic_set(&sdebug_cmnd_count, 0);
return length;
}
/* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
* same for each scsi_debug host (if more than one). Some of the counters
* output are not atomics so might be inaccurate in a busy system. */
static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
{
int f, l;
char b[32];
if (scsi_debug_every_nth > 0)
snprintf(b, sizeof(b), " (curr:%d)",
((SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) ?
atomic_read(&sdebug_a_tsf) :
atomic_read(&sdebug_cmnd_count)));
else
b[0] = '\0';
seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n"
"num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
"every_nth=%d%s\n"
"delay=%d, ndelay=%d, max_luns=%d, q_completions=%d\n"
"sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
"command aborts=%d; RESETs: device=%d, target=%d, bus=%d, "
"host=%d\ndix_reads=%d dix_writes=%d dif_errors=%d "
"usec_in_jiffy=%lu\n",
SCSI_DEBUG_VERSION, scsi_debug_version_date,
scsi_debug_num_tgts, scsi_debug_dev_size_mb, scsi_debug_opts,
scsi_debug_every_nth, b, scsi_debug_delay, scsi_debug_ndelay,
scsi_debug_max_luns, atomic_read(&sdebug_completions),
scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads,
sdebug_sectors_per, num_aborts, num_dev_resets,
num_target_resets, num_bus_resets, num_host_resets,
dix_reads, dix_writes, dif_errors, TICK_NSEC / 1000);
f = find_first_bit(queued_in_use_bm, scsi_debug_max_queue);
if (f != scsi_debug_max_queue) {
l = find_last_bit(queued_in_use_bm, scsi_debug_max_queue);
seq_printf(m, " %s BUSY: first,last bits set: %d,%d\n",
"queued_in_use_bm", f, l);
}
return 0;
}
static ssize_t delay_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
}
/* Returns -EBUSY if delay is being changed and commands are queued */
static ssize_t delay_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int delay, res;
if ((count > 0) && (1 == sscanf(buf, "%d", &delay))) {
res = count;
if (scsi_debug_delay != delay) {
unsigned long iflags;
int k;
spin_lock_irqsave(&queued_arr_lock, iflags);
k = find_first_bit(queued_in_use_bm,
scsi_debug_max_queue);
if (k != scsi_debug_max_queue)
res = -EBUSY; /* have queued commands */
else {
scsi_debug_delay = delay;
scsi_debug_ndelay = 0;
}
spin_unlock_irqrestore(&queued_arr_lock, iflags);
}
return res;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(delay);
static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ndelay);
}
/* Returns -EBUSY if ndelay is being changed and commands are queued */
/* If > 0 and accepted then scsi_debug_delay is set to DELAY_OVERRIDDEN */
static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
size_t count)
{
unsigned long iflags;
int ndelay, res, k;
if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
(ndelay >= 0) && (ndelay < 1000000000)) {
res = count;
if (scsi_debug_ndelay != ndelay) {
spin_lock_irqsave(&queued_arr_lock, iflags);
k = find_first_bit(queued_in_use_bm,
scsi_debug_max_queue);
if (k != scsi_debug_max_queue)
res = -EBUSY; /* have queued commands */
else {
scsi_debug_ndelay = ndelay;
scsi_debug_delay = ndelay ? DELAY_OVERRIDDEN
: DEF_DELAY;
}
spin_unlock_irqrestore(&queued_arr_lock, iflags);
}
return res;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(ndelay);
static ssize_t opts_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
}
static ssize_t opts_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int opts;
char work[20];
if (1 == sscanf(buf, "%10s", work)) {
if (0 == strncasecmp(work,"0x", 2)) {
if (1 == sscanf(&work[2], "%x", &opts))
goto opts_done;
} else {
if (1 == sscanf(work, "%d", &opts))
goto opts_done;
}
}
return -EINVAL;
opts_done:
scsi_debug_opts = opts;
atomic_set(&sdebug_cmnd_count, 0);
atomic_set(&sdebug_a_tsf, 0);
return count;
}
static DRIVER_ATTR_RW(opts);
static ssize_t ptype_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
}
static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n;
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
scsi_debug_ptype = n;
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(ptype);
static ssize_t dsense_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
}
static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n;
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
scsi_debug_dsense = n;
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(dsense);
static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
}
static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n;
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
n = (n > 0);
scsi_debug_fake_rw = (scsi_debug_fake_rw > 0);
if (scsi_debug_fake_rw != n) {
if ((0 == n) && (NULL == fake_storep)) {
unsigned long sz =
(unsigned long)scsi_debug_dev_size_mb *
1048576;
fake_storep = vmalloc(sz);
if (NULL == fake_storep) {
pr_err("%s: out of memory, 9\n",
__func__);
return -ENOMEM;
}
memset(fake_storep, 0, sz);
}
scsi_debug_fake_rw = n;
}
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(fake_rw);
static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0);
}
static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n;
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
scsi_debug_no_lun_0 = n;
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(no_lun_0);
static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
}
static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n;
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
scsi_debug_num_tgts = n;
sdebug_max_tgts_luns();
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(num_tgts);
static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
}
static DRIVER_ATTR_RO(dev_size_mb);
static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
}
static DRIVER_ATTR_RO(num_parts);
static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
}
static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int nth;
if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
scsi_debug_every_nth = nth;
atomic_set(&sdebug_cmnd_count, 0);
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(every_nth);
static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
}
static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n;
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
scsi_debug_max_luns = n;
sdebug_max_tgts_luns();
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(max_luns);
static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue);
}
/* N.B. max_queue can be changed while there are queued commands. In flight
* commands beyond the new max_queue will be completed. */
static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
size_t count)
{
unsigned long iflags;
int n, k;
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
(n <= SCSI_DEBUG_CANQUEUE)) {
spin_lock_irqsave(&queued_arr_lock, iflags);
k = find_last_bit(queued_in_use_bm, SCSI_DEBUG_CANQUEUE);
scsi_debug_max_queue = n;
if (SCSI_DEBUG_CANQUEUE == k)
atomic_set(&retired_max_queue, 0);
else if (k >= n)
atomic_set(&retired_max_queue, k + 1);
else
atomic_set(&retired_max_queue, 0);
spin_unlock_irqrestore(&queued_arr_lock, iflags);
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(max_queue);
static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld);
}
static DRIVER_ATTR_RO(no_uld);
static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
}
static DRIVER_ATTR_RO(scsi_level);
static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb);
}
static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n;
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
scsi_debug_virtual_gb = n;
sdebug_capacity = get_sdebug_capacity();
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(virtual_gb);
static ssize_t add_host_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
}
static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int delta_hosts;
if (sscanf(buf, "%d", &delta_hosts) != 1)
return -EINVAL;
if (delta_hosts > 0) {
do {
sdebug_add_adapter();
} while (--delta_hosts);
} else if (delta_hosts < 0) {
do {
sdebug_remove_adapter();
} while (++delta_hosts);
}
return count;
}
static DRIVER_ATTR_RW(add_host);
static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno);
}
static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n;
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
scsi_debug_vpd_use_hostno = n;
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(vpd_use_hostno);
static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size);
}
static DRIVER_ATTR_RO(sector_size);
static ssize_t dix_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix);
}
static DRIVER_ATTR_RO(dix);
static ssize_t dif_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif);
}
static DRIVER_ATTR_RO(dif);
static ssize_t guard_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_guard);
}
static DRIVER_ATTR_RO(guard);
static ssize_t ato_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato);
}
static DRIVER_ATTR_RO(ato);
static ssize_t map_show(struct device_driver *ddp, char *buf)
{
ssize_t count;
if (!scsi_debug_lbp())
return scnprintf(buf, PAGE_SIZE, "0-%u\n",
sdebug_store_sectors);
count = bitmap_scnlistprintf(buf, PAGE_SIZE, map_storep, map_size);
buf[count++] = '\n';
buf[count++] = 0;
return count;
}
static DRIVER_ATTR_RO(map);
static ssize_t removable_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_removable ? 1 : 0);
}
static ssize_t removable_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n;
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
scsi_debug_removable = (n > 0);
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(removable);
static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", !!scsi_debug_host_lock);
}
/* Returns -EBUSY if host_lock is being changed and commands are queued */
static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n, res;
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
bool new_host_lock = (n > 0);
res = count;
if (new_host_lock != scsi_debug_host_lock) {
unsigned long iflags;
int k;
spin_lock_irqsave(&queued_arr_lock, iflags);
k = find_first_bit(queued_in_use_bm,
scsi_debug_max_queue);
if (k != scsi_debug_max_queue)
res = -EBUSY; /* have queued commands */
else
scsi_debug_host_lock = new_host_lock;
spin_unlock_irqrestore(&queued_arr_lock, iflags);
}
return res;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(host_lock);
/* Note: The following array creates attribute files in the
/sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
files (over those found in the /sys/module/scsi_debug/parameters
directory) is that auxiliary actions can be triggered when an attribute
is changed. For example see: sdebug_add_host_store() above.
*/
static struct attribute *sdebug_drv_attrs[] = {
&driver_attr_delay.attr,
&driver_attr_opts.attr,
&driver_attr_ptype.attr,
&driver_attr_dsense.attr,
&driver_attr_fake_rw.attr,
&driver_attr_no_lun_0.attr,
&driver_attr_num_tgts.attr,
&driver_attr_dev_size_mb.attr,
&driver_attr_num_parts.attr,
&driver_attr_every_nth.attr,
&driver_attr_max_luns.attr,
&driver_attr_max_queue.attr,
&driver_attr_no_uld.attr,
&driver_attr_scsi_level.attr,
&driver_attr_virtual_gb.attr,
&driver_attr_add_host.attr,
&driver_attr_vpd_use_hostno.attr,
&driver_attr_sector_size.attr,
&driver_attr_dix.attr,
&driver_attr_dif.attr,
&driver_attr_guard.attr,
&driver_attr_ato.attr,
&driver_attr_map.attr,
&driver_attr_removable.attr,
&driver_attr_host_lock.attr,
&driver_attr_ndelay.attr,
NULL,
};
ATTRIBUTE_GROUPS(sdebug_drv);
static struct device *pseudo_primary;
static int __init scsi_debug_init(void)
{
unsigned long sz;
int host_to_add;
int k;
int ret;
atomic_set(&sdebug_cmnd_count, 0);
atomic_set(&sdebug_completions, 0);
atomic_set(&retired_max_queue, 0);
if (scsi_debug_ndelay >= 1000000000) {
pr_warn("%s: ndelay must be less than 1 second, ignored\n",
__func__);
scsi_debug_ndelay = 0;
} else if (scsi_debug_ndelay > 0)
scsi_debug_delay = DELAY_OVERRIDDEN;
switch (scsi_debug_sector_size) {
case 512:
case 1024:
case 2048:
case 4096:
break;
default:
pr_err("%s: invalid sector_size %d\n", __func__,
scsi_debug_sector_size);
return -EINVAL;
}
switch (scsi_debug_dif) {
case SD_DIF_TYPE0_PROTECTION:
case SD_DIF_TYPE1_PROTECTION:
case SD_DIF_TYPE2_PROTECTION:
case SD_DIF_TYPE3_PROTECTION:
break;
default:
pr_err("%s: dif must be 0, 1, 2 or 3\n", __func__);
return -EINVAL;
}
if (scsi_debug_guard > 1) {
pr_err("%s: guard must be 0 or 1\n", __func__);
return -EINVAL;
}
if (scsi_debug_ato > 1) {
pr_err("%s: ato must be 0 or 1\n", __func__);
return -EINVAL;
}
if (scsi_debug_physblk_exp > 15) {
pr_err("%s: invalid physblk_exp %u\n", __func__,
scsi_debug_physblk_exp);
return -EINVAL;
}
if (scsi_debug_lowest_aligned > 0x3fff) {
pr_err("%s: lowest_aligned too big: %u\n", __func__,
scsi_debug_lowest_aligned);
return -EINVAL;
}
if (scsi_debug_dev_size_mb < 1)
scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;
sdebug_store_sectors = sz / scsi_debug_sector_size;
sdebug_capacity = get_sdebug_capacity();
/* play around with geometry, don't waste too much on track 0 */
sdebug_heads = 8;
sdebug_sectors_per = 32;
if (scsi_debug_dev_size_mb >= 16)
sdebug_heads = 32;
else if (scsi_debug_dev_size_mb >= 256)
sdebug_heads = 64;
sdebug_cylinders_per = (unsigned long)sdebug_capacity /
(sdebug_sectors_per * sdebug_heads);
if (sdebug_cylinders_per >= 1024) {
/* other LLDs do this; implies >= 1GB ram disk ... */
sdebug_heads = 255;
sdebug_sectors_per = 63;
sdebug_cylinders_per = (unsigned long)sdebug_capacity /
(sdebug_sectors_per * sdebug_heads);
}
if (0 == scsi_debug_fake_rw) {
fake_storep = vmalloc(sz);
if (NULL == fake_storep) {
pr_err("%s: out of memory, 1\n", __func__);
return -ENOMEM;
}
memset(fake_storep, 0, sz);
if (scsi_debug_num_parts > 0)
sdebug_build_parts(fake_storep, sz);
}
if (scsi_debug_dix) {
int dif_size;
dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple);
dif_storep = vmalloc(dif_size);
pr_err("%s: dif_storep %u bytes @ %p\n", __func__, dif_size,
dif_storep);
if (dif_storep == NULL) {
pr_err("%s: out of mem. (DIX)\n", __func__);
ret = -ENOMEM;
goto free_vm;
}
memset(dif_storep, 0xff, dif_size);
}
/* Logical Block Provisioning */
if (scsi_debug_lbp()) {
scsi_debug_unmap_max_blocks =
clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU);
scsi_debug_unmap_max_desc =
clamp(scsi_debug_unmap_max_desc, 0U, 256U);
scsi_debug_unmap_granularity =
clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU);
if (scsi_debug_unmap_alignment &&
scsi_debug_unmap_granularity <=
scsi_debug_unmap_alignment) {
pr_err("%s: ERR: unmap_granularity <= unmap_alignment\n",
__func__);
return -EINVAL;
}
map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long));
pr_info("%s: %lu provisioning blocks\n", __func__, map_size);
if (map_storep == NULL) {
pr_err("%s: out of mem. (MAP)\n", __func__);
ret = -ENOMEM;
goto free_vm;
}
bitmap_zero(map_storep, map_size);
/* Map first 1KB for partition table */
if (scsi_debug_num_parts)
map_region(0, 2);
}
pseudo_primary = root_device_register("pseudo_0");
if (IS_ERR(pseudo_primary)) {
pr_warn("%s: root_device_register() error\n", __func__);
ret = PTR_ERR(pseudo_primary);
goto free_vm;
}
ret = bus_register(&pseudo_lld_bus);
if (ret < 0) {
pr_warn("%s: bus_register error: %d\n", __func__, ret);
goto dev_unreg;
}
ret = driver_register(&sdebug_driverfs_driver);
if (ret < 0) {
pr_warn("%s: driver_register error: %d\n", __func__, ret);
goto bus_unreg;
}
host_to_add = scsi_debug_add_host;
scsi_debug_add_host = 0;
for (k = 0; k < host_to_add; k++) {
if (sdebug_add_adapter()) {
pr_err("%s: sdebug_add_adapter failed k=%d\n",
__func__, k);
break;
}
}
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
pr_info("%s: built %d host(s)\n", __func__,
scsi_debug_add_host);
}
return 0;
bus_unreg:
bus_unregister(&pseudo_lld_bus);
dev_unreg:
root_device_unregister(pseudo_primary);
free_vm:
if (map_storep)
vfree(map_storep);
if (dif_storep)
vfree(dif_storep);
vfree(fake_storep);
return ret;
}
static void __exit scsi_debug_exit(void)
{
int k = scsi_debug_add_host;
stop_all_queued();
free_all_queued();
for (; k; k--)
sdebug_remove_adapter();
driver_unregister(&sdebug_driverfs_driver);
bus_unregister(&pseudo_lld_bus);
root_device_unregister(pseudo_primary);
if (dif_storep)
vfree(dif_storep);
vfree(fake_storep);
}
device_initcall(scsi_debug_init);
module_exit(scsi_debug_exit);
static void sdebug_release_adapter(struct device * dev)
{
struct sdebug_host_info *sdbg_host;
sdbg_host = to_sdebug_host(dev);
kfree(sdbg_host);
}
static int sdebug_add_adapter(void)
{
int k, devs_per_host;
int error = 0;
struct sdebug_host_info *sdbg_host;
struct sdebug_dev_info *sdbg_devinfo, *tmp;
sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
if (NULL == sdbg_host) {
printk(KERN_ERR "%s: out of memory at line %d\n",
__func__, __LINE__);
return -ENOMEM;
}
INIT_LIST_HEAD(&sdbg_host->dev_info_list);
devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns;
for (k = 0; k < devs_per_host; k++) {
sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
if (!sdbg_devinfo) {
printk(KERN_ERR "%s: out of memory at line %d\n",
__func__, __LINE__);
error = -ENOMEM;
goto clean;
}
}
spin_lock(&sdebug_host_list_lock);
list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
spin_unlock(&sdebug_host_list_lock);
sdbg_host->dev.bus = &pseudo_lld_bus;
sdbg_host->dev.parent = pseudo_primary;
sdbg_host->dev.release = &sdebug_release_adapter;
dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);
error = device_register(&sdbg_host->dev);
if (error)
goto clean;
++scsi_debug_add_host;
return error;
clean:
list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
dev_list) {
list_del(&sdbg_devinfo->dev_list);
kfree(sdbg_devinfo);
}
kfree(sdbg_host);
return error;
}
static void sdebug_remove_adapter(void)
{
struct sdebug_host_info * sdbg_host = NULL;
spin_lock(&sdebug_host_list_lock);
if (!list_empty(&sdebug_host_list)) {
sdbg_host = list_entry(sdebug_host_list.prev,
struct sdebug_host_info, host_list);
list_del(&sdbg_host->host_list);
}
spin_unlock(&sdebug_host_list_lock);
if (!sdbg_host)
return;
device_unregister(&sdbg_host->dev);
--scsi_debug_add_host;
}
static int
scsi_debug_queuecommand(struct scsi_cmnd *SCpnt)
{
unsigned char *cmd = SCpnt->cmnd;
int len, k;
unsigned int num;
unsigned long long lba;
u32 ei_lba;
int errsts = 0;
int target = SCpnt->device->id;
struct sdebug_dev_info *devip = NULL;
int inj_recovered = 0;
int inj_transport = 0;
int inj_dif = 0;
int inj_dix = 0;
int inj_short = 0;
int delay_override = 0;
int unmap = 0;
scsi_set_resid(SCpnt, 0);
if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) &&
!(SCSI_DEBUG_OPT_NO_CDB_NOISE & scsi_debug_opts)) {
char b[120];
int n;
len = SCpnt->cmd_len;
if (len > 32)
strcpy(b, "too long, over 32 bytes");
else {
for (k = 0, n = 0; k < len; ++k)
n += scnprintf(b + n, sizeof(b) - n, "%02x ",
(unsigned int)cmd[k]);
}
sdev_printk(KERN_INFO, SCpnt->device, "%s: cmd %s\n", my_name,
b);
}
if ((SCpnt->device->lun >= scsi_debug_max_luns) &&
(SCpnt->device->lun != SAM2_WLUN_REPORT_LUNS))
return schedule_resp(SCpnt, NULL, DID_NO_CONNECT << 16, 0);
devip = devInfoReg(SCpnt->device);
if (NULL == devip)
return schedule_resp(SCpnt, NULL, DID_NO_CONNECT << 16, 0);
if ((scsi_debug_every_nth != 0) &&
(atomic_inc_return(&sdebug_cmnd_count) >=
abs(scsi_debug_every_nth))) {
atomic_set(&sdebug_cmnd_count, 0);
if (scsi_debug_every_nth < -1)
scsi_debug_every_nth = -1;
if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
return 0; /* ignore command causing timeout */
else if (SCSI_DEBUG_OPT_MAC_TIMEOUT & scsi_debug_opts &&
scsi_medium_access_command(SCpnt))
return 0; /* time out reads and writes */
else if (SCSI_DEBUG_OPT_RECOVERED_ERR & scsi_debug_opts)
inj_recovered = 1; /* to reads and writes below */
else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & scsi_debug_opts)
inj_transport = 1; /* to reads and writes below */
else if (SCSI_DEBUG_OPT_DIF_ERR & scsi_debug_opts)
inj_dif = 1; /* to reads and writes below */
else if (SCSI_DEBUG_OPT_DIX_ERR & scsi_debug_opts)
inj_dix = 1; /* to reads and writes below */
else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & scsi_debug_opts)
inj_short = 1;
}
if (devip->wlun) {
switch (*cmd) {
case INQUIRY:
case REQUEST_SENSE:
case TEST_UNIT_READY:
case REPORT_LUNS:
break; /* only allowable wlun commands */
default:
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
printk(KERN_INFO "scsi_debug: Opcode: 0x%x "
"not supported for wlun\n", *cmd);
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST,
INVALID_OPCODE, 0);
errsts = check_condition_result;
return schedule_resp(SCpnt, devip, errsts, 0);
}
}
switch (*cmd) {
case INQUIRY: /* mandatory, ignore unit attention */
delay_override = 1;
errsts = resp_inquiry(SCpnt, target, devip);
break;
case REQUEST_SENSE: /* mandatory, ignore unit attention */
delay_override = 1;
errsts = resp_requests(SCpnt, devip);
break;
case REZERO_UNIT: /* actually this is REWIND for SSC */
case START_STOP:
errsts = resp_start_stop(SCpnt, devip);
break;
case ALLOW_MEDIUM_REMOVAL:
errsts = check_readiness(SCpnt, UAS_ONLY, devip);
if (errsts)
break;
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
printk(KERN_INFO "scsi_debug: Medium removal %s\n",
cmd[4] ? "inhibited" : "enabled");
break;
case SEND_DIAGNOSTIC: /* mandatory */
errsts = check_readiness(SCpnt, UAS_ONLY, devip);
break;
case TEST_UNIT_READY: /* mandatory */
/* delay_override = 1; */
errsts = check_readiness(SCpnt, UAS_TUR, devip);
break;
case RESERVE:
errsts = check_readiness(SCpnt, UAS_ONLY, devip);
break;
case RESERVE_10:
errsts = check_readiness(SCpnt, UAS_ONLY, devip);
break;
case RELEASE:
errsts = check_readiness(SCpnt, UAS_ONLY, devip);
break;
case RELEASE_10:
errsts = check_readiness(SCpnt, UAS_ONLY, devip);
break;
case READ_CAPACITY:
errsts = resp_readcap(SCpnt, devip);
break;
case SERVICE_ACTION_IN:
if (cmd[1] == SAI_READ_CAPACITY_16)
errsts = resp_readcap16(SCpnt, devip);
else if (cmd[1] == SAI_GET_LBA_STATUS) {
if (scsi_debug_lbp() == 0) {
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST,
INVALID_COMMAND_OPCODE, 0);
errsts = check_condition_result;
} else
errsts = resp_get_lba_status(SCpnt, devip);
} else {
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST,
INVALID_OPCODE, 0);
errsts = check_condition_result;
}
break;
case MAINTENANCE_IN:
if (MI_REPORT_TARGET_PGS != cmd[1]) {
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST,
INVALID_OPCODE, 0);
errsts = check_condition_result;
break;
}
errsts = resp_report_tgtpgs(SCpnt, devip);
break;
case READ_16:
case READ_12:
case READ_10:
/* READ{10,12,16} and DIF Type 2 are natural enemies */
if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
cmd[1] & 0xe0) {
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST,
INVALID_COMMAND_OPCODE, 0);
errsts = check_condition_result;
break;
}
if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
(cmd[1] & 0xe0) == 0)
printk(KERN_ERR "Unprotected RD/WR to DIF device\n");
/* fall through */
case READ_6:
read:
errsts = check_readiness(SCpnt, UAS_TUR, devip);
if (errsts)
break;
if (scsi_debug_fake_rw)
break;
get_data_transfer_info(cmd, &lba, &num, &ei_lba);
if (inj_short)
num /= 2;
errsts = resp_read(SCpnt, lba, num, ei_lba);
if (inj_recovered && (0 == errsts)) {
mk_sense_buffer(SCpnt, RECOVERED_ERROR,
THRESHOLD_EXCEEDED, 0);
errsts = check_condition_result;
} else if (inj_transport && (0 == errsts)) {
mk_sense_buffer(SCpnt, ABORTED_COMMAND,
TRANSPORT_PROBLEM, ACK_NAK_TO);
errsts = check_condition_result;
} else if (inj_dif && (0 == errsts)) {
/* Logical block guard check failed */
mk_sense_buffer(SCpnt, ABORTED_COMMAND, 0x10, 1);
errsts = illegal_condition_result;
} else if (inj_dix && (0 == errsts)) {
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, 0x10, 1);
errsts = illegal_condition_result;
}
break;
case REPORT_LUNS: /* mandatory, ignore unit attention */
delay_override = 1;
errsts = resp_report_luns(SCpnt, devip);
break;
case VERIFY: /* 10 byte SBC-2 command */
errsts = check_readiness(SCpnt, UAS_TUR, devip);
break;
case WRITE_16:
case WRITE_12:
case WRITE_10:
/* WRITE{10,12,16} and DIF Type 2 are natural enemies */
if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
cmd[1] & 0xe0) {
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST,
INVALID_COMMAND_OPCODE, 0);
errsts = check_condition_result;
break;
}
if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
(cmd[1] & 0xe0) == 0)
printk(KERN_ERR "Unprotected RD/WR to DIF device\n");
/* fall through */
case WRITE_6:
write:
errsts = check_readiness(SCpnt, UAS_TUR, devip);
if (errsts)
break;
if (scsi_debug_fake_rw)
break;
get_data_transfer_info(cmd, &lba, &num, &ei_lba);
errsts = resp_write(SCpnt, lba, num, ei_lba);
if (inj_recovered && (0 == errsts)) {
mk_sense_buffer(SCpnt, RECOVERED_ERROR,
THRESHOLD_EXCEEDED, 0);
errsts = check_condition_result;
} else if (inj_dif && (0 == errsts)) {
mk_sense_buffer(SCpnt, ABORTED_COMMAND, 0x10, 1);
errsts = illegal_condition_result;
} else if (inj_dix && (0 == errsts)) {
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, 0x10, 1);
errsts = illegal_condition_result;
}
break;
case WRITE_SAME_16:
case WRITE_SAME:
if (cmd[1] & 0x8) {
if ((*cmd == WRITE_SAME_16 && scsi_debug_lbpws == 0) ||
(*cmd == WRITE_SAME && scsi_debug_lbpws10 == 0)) {
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST,
INVALID_FIELD_IN_CDB, 0);
errsts = check_condition_result;
} else
unmap = 1;
}
if (errsts)
break;
errsts = check_readiness(SCpnt, UAS_TUR, devip);
if (errsts)
break;
if (scsi_debug_fake_rw)
break;
get_data_transfer_info(cmd, &lba, &num, &ei_lba);
errsts = resp_write_same(SCpnt, lba, num, ei_lba, unmap);
break;
case UNMAP:
errsts = check_readiness(SCpnt, UAS_TUR, devip);
if (errsts)
break;
if (scsi_debug_fake_rw)
break;
if (scsi_debug_unmap_max_desc == 0 || scsi_debug_lbpu == 0) {
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST,
INVALID_COMMAND_OPCODE, 0);
errsts = check_condition_result;
} else
errsts = resp_unmap(SCpnt, devip);
break;
case MODE_SENSE:
case MODE_SENSE_10:
errsts = resp_mode_sense(SCpnt, target, devip);
break;
case MODE_SELECT:
errsts = resp_mode_select(SCpnt, 1, devip);
break;
case MODE_SELECT_10:
errsts = resp_mode_select(SCpnt, 0, devip);
break;
case LOG_SENSE:
errsts = resp_log_sense(SCpnt, devip);
break;
case SYNCHRONIZE_CACHE:
delay_override = 1;
errsts = check_readiness(SCpnt, UAS_TUR, devip);
break;
case WRITE_BUFFER:
errsts = check_readiness(SCpnt, UAS_ONLY, devip);
break;
case XDWRITEREAD_10:
if (!scsi_bidi_cmnd(SCpnt)) {
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST,
INVALID_FIELD_IN_CDB, 0);
errsts = check_condition_result;
break;
}
errsts = check_readiness(SCpnt, UAS_TUR, devip);
if (errsts)
break;
if (scsi_debug_fake_rw)
break;
get_data_transfer_info(cmd, &lba, &num, &ei_lba);
errsts = resp_read(SCpnt, lba, num, ei_lba);
if (errsts)
break;
errsts = resp_write(SCpnt, lba, num, ei_lba);
if (errsts)
break;
errsts = resp_xdwriteread(SCpnt, lba, num, devip);
break;
case VARIABLE_LENGTH_CMD:
if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION) {
if ((cmd[10] & 0xe0) == 0)
printk(KERN_ERR
"Unprotected RD/WR to DIF device\n");
if (cmd[9] == READ_32) {
BUG_ON(SCpnt->cmd_len < 32);
goto read;
}
if (cmd[9] == WRITE_32) {
BUG_ON(SCpnt->cmd_len < 32);
goto write;
}
}
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST,
INVALID_FIELD_IN_CDB, 0);
errsts = check_condition_result;
break;
case 0x85:
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
sdev_printk(KERN_INFO, SCpnt->device,
"%s: ATA PASS-THROUGH(16) not supported\n", my_name);
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST,
INVALID_OPCODE, 0);
errsts = check_condition_result;
break;
default:
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
sdev_printk(KERN_INFO, SCpnt->device,
"%s: Opcode: 0x%x not supported\n",
my_name, *cmd);
errsts = check_readiness(SCpnt, UAS_ONLY, devip);
if (errsts)
break; /* Unit attention takes precedence */
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
errsts = check_condition_result;
break;
}
return schedule_resp(SCpnt, devip, errsts,
(delay_override ? 0 : scsi_debug_delay));
}
static int
sdebug_queuecommand_lock_or_not(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
{
if (scsi_debug_host_lock) {
unsigned long iflags;
int rc;
spin_lock_irqsave(shost->host_lock, iflags);
rc = scsi_debug_queuecommand(cmd);
spin_unlock_irqrestore(shost->host_lock, iflags);
return rc;
} else
return scsi_debug_queuecommand(cmd);
}
static int
sdebug_change_qdepth(struct scsi_device *sdev, int qdepth, int reason)
{
int num_in_q = 0;
int bad = 0;
unsigned long iflags;
struct sdebug_dev_info *devip;
spin_lock_irqsave(&queued_arr_lock, iflags);
devip = (struct sdebug_dev_info *)sdev->hostdata;
if (NULL == devip) {
spin_unlock_irqrestore(&queued_arr_lock, iflags);
return -ENODEV;
}
num_in_q = atomic_read(&devip->num_in_q);
spin_unlock_irqrestore(&queued_arr_lock, iflags);
if (reason == SCSI_QDEPTH_DEFAULT || reason == SCSI_QDEPTH_RAMP_UP) {
if (qdepth < 1)
qdepth = 1;
/* allow to exceed max host queued_arr elements for testing */
if (qdepth > SCSI_DEBUG_CANQUEUE + 10)
qdepth = SCSI_DEBUG_CANQUEUE + 10;
scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
} else if (reason == SCSI_QDEPTH_QFULL)
scsi_track_queue_full(sdev, qdepth);
else
bad = 1;
if (bad)
sdev_printk(KERN_WARNING, sdev,
"%s: unknown reason=0x%x\n", __func__, reason);
if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) {
if (SCSI_QDEPTH_QFULL == reason)
sdev_printk(KERN_INFO, sdev,
"%s: -> %d, num_in_q=%d, reason: queue full\n",
__func__, qdepth, num_in_q);
else {
const char *cp;
switch (reason) {
case SCSI_QDEPTH_DEFAULT:
cp = "default (sysfs ?)";
break;
case SCSI_QDEPTH_RAMP_UP:
cp = "ramp up";
break;
default:
cp = "unknown";
break;
}
sdev_printk(KERN_INFO, sdev,
"%s: qdepth=%d, num_in_q=%d, reason: %s\n",
__func__, qdepth, num_in_q, cp);
}
}
return sdev->queue_depth;
}
static int
sdebug_change_qtype(struct scsi_device *sdev, int qtype)
{
if (sdev->tagged_supported) {
scsi_set_tag_type(sdev, qtype);
if (qtype)
scsi_activate_tcq(sdev, sdev->queue_depth);
else
scsi_deactivate_tcq(sdev, sdev->queue_depth);
} else
qtype = 0;
if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) {
const char *cp;
switch (qtype) {
case 0:
cp = "untagged";
break;
case MSG_SIMPLE_TAG:
cp = "simple tags";
break;
case MSG_ORDERED_TAG:
cp = "ordered tags";
break;
default:
cp = "unknown";
break;
}
sdev_printk(KERN_INFO, sdev, "%s: to %s\n", __func__, cp);
}
return qtype;
}
static struct scsi_host_template sdebug_driver_template = {
.show_info = scsi_debug_show_info,
.write_info = scsi_debug_write_info,
.proc_name = sdebug_proc_name,
.name = "SCSI DEBUG",
.info = scsi_debug_info,
.slave_alloc = scsi_debug_slave_alloc,
.slave_configure = scsi_debug_slave_configure,
.slave_destroy = scsi_debug_slave_destroy,
.ioctl = scsi_debug_ioctl,
.queuecommand = sdebug_queuecommand_lock_or_not,
.change_queue_depth = sdebug_change_qdepth,
.change_queue_type = sdebug_change_qtype,
.eh_abort_handler = scsi_debug_abort,
.eh_device_reset_handler = scsi_debug_device_reset,
.eh_target_reset_handler = scsi_debug_target_reset,
.eh_bus_reset_handler = scsi_debug_bus_reset,
.eh_host_reset_handler = scsi_debug_host_reset,
.can_queue = SCSI_DEBUG_CANQUEUE,
.this_id = 7,
.sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS,
.cmd_per_lun = DEF_CMD_PER_LUN,
.max_sectors = -1U,
.use_clustering = DISABLE_CLUSTERING,
.module = THIS_MODULE,
};
static int sdebug_driver_probe(struct device * dev)
{
int error = 0;
struct sdebug_host_info *sdbg_host;
struct Scsi_Host *hpnt;
int host_prot;
sdbg_host = to_sdebug_host(dev);
sdebug_driver_template.can_queue = scsi_debug_max_queue;
if (scsi_debug_clustering)
sdebug_driver_template.use_clustering = ENABLE_CLUSTERING;
hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
if (NULL == hpnt) {
printk(KERN_ERR "%s: scsi_register failed\n", __func__);
error = -ENODEV;
return error;
}
sdbg_host->shost = hpnt;
*((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id))
hpnt->max_id = scsi_debug_num_tgts + 1;
else
hpnt->max_id = scsi_debug_num_tgts;
hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* = scsi_debug_max_luns; */
host_prot = 0;
switch (scsi_debug_dif) {
case SD_DIF_TYPE1_PROTECTION:
host_prot = SHOST_DIF_TYPE1_PROTECTION;
if (scsi_debug_dix)
host_prot |= SHOST_DIX_TYPE1_PROTECTION;
break;
case SD_DIF_TYPE2_PROTECTION:
host_prot = SHOST_DIF_TYPE2_PROTECTION;
if (scsi_debug_dix)
host_prot |= SHOST_DIX_TYPE2_PROTECTION;
break;
case SD_DIF_TYPE3_PROTECTION:
host_prot = SHOST_DIF_TYPE3_PROTECTION;
if (scsi_debug_dix)
host_prot |= SHOST_DIX_TYPE3_PROTECTION;
break;
default:
if (scsi_debug_dix)
host_prot |= SHOST_DIX_TYPE0_PROTECTION;
break;
}
scsi_host_set_prot(hpnt, host_prot);
printk(KERN_INFO "scsi_debug: host protection%s%s%s%s%s%s%s\n",
(host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
(host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
(host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
(host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
(host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
(host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
(host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
if (scsi_debug_guard == 1)
scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
else
scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
error = scsi_add_host(hpnt, &sdbg_host->dev);
if (error) {
printk(KERN_ERR "%s: scsi_add_host failed\n", __func__);
error = -ENODEV;
scsi_host_put(hpnt);
} else
scsi_scan_host(hpnt);
return error;
}
static int sdebug_driver_remove(struct device * dev)
{
struct sdebug_host_info *sdbg_host;
struct sdebug_dev_info *sdbg_devinfo, *tmp;
sdbg_host = to_sdebug_host(dev);
if (!sdbg_host) {
printk(KERN_ERR "%s: Unable to locate host info\n",
__func__);
return -ENODEV;
}
scsi_remove_host(sdbg_host->shost);
list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
dev_list) {
list_del(&sdbg_devinfo->dev_list);
kfree(sdbg_devinfo);
}
scsi_host_put(sdbg_host->shost);
return 0;
}
static int pseudo_lld_bus_match(struct device *dev,
struct device_driver *dev_driver)
{
return 1;
}
static struct bus_type pseudo_lld_bus = {
.name = "pseudo",
.match = pseudo_lld_bus_match,
.probe = sdebug_driver_probe,
.remove = sdebug_driver_remove,
.drv_groups = sdebug_drv_groups,
};
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