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linux_old1/drivers/scsi/scsi_debug.c

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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://www.torque.net/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/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 <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 <linux/stat.h>
#include "scsi_logging.h"
#define SCSI_DEBUG_VERSION "1.81"
static const char * scsi_debug_version_date = "20070104";
/* Additional Sense Code (ASC) */
#define NO_ADDITIONAL_SENSE 0x0
#define LOGICAL_UNIT_NOT_READY 0x4
#define UNRECOVERED_READ_ERR 0x11
#define PARAMETER_LIST_LENGTH_ERR 0x1a
#define INVALID_OPCODE 0x20
#define ADDR_OUT_OF_RANGE 0x21
#define INVALID_FIELD_IN_CDB 0x24
#define INVALID_FIELD_IN_PARAM_LIST 0x26
#define POWERON_RESET 0x29
#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
#define SDEBUG_TAGGED_QUEUING 0 /* 0 | MSG_SIMPLE_TAG | MSG_ORDERED_TAG */
/* 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_DELAY 1
#define DEF_DEV_SIZE_MB 8
#define DEF_EVERY_NTH 0
#define DEF_NUM_PARTS 0
#define DEF_OPTS 0
#define DEF_SCSI_LEVEL 5 /* INQUIRY, byte2 [5->SPC-3] */
#define DEF_PTYPE 0
#define DEF_D_SENSE 0
#define DEF_NO_LUN_0 0
#define DEF_VIRTUAL_GB 0
#define DEF_FAKE_RW 0
#define DEF_VPD_USE_HOSTNO 1
/* 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
/* 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).
*/
/* 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 */
/* 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
static int scsi_debug_add_host = DEF_NUM_HOST;
static int scsi_debug_delay = DEF_DELAY;
static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
static int scsi_debug_every_nth = DEF_EVERY_NTH;
static int scsi_debug_max_luns = DEF_MAX_LUNS;
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_opts = DEF_OPTS;
static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
static int scsi_debug_dsense = DEF_D_SENSE;
static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
static int scsi_debug_fake_rw = DEF_FAKE_RW;
static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
static int scsi_debug_cmnd_count = 0;
#define DEV_READONLY(TGT) (0)
#define DEV_REMOVEABLE(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 */
/* default sector size is 512 bytes, 2**9 bytes */
#define POW2_SECT_SIZE 9
#define SECT_SIZE (1 << POW2_SECT_SIZE)
#define SECT_SIZE_PER(TGT) SECT_SIZE
#define SDEBUG_MAX_PARTS 4
#define SDEBUG_SENSE_LEN 32
#define SCSI_DEBUG_CANQUEUE 255
#define SCSI_DEBUG_MAX_CMD_LEN 16
struct sdebug_dev_info {
struct list_head dev_list;
unsigned char sense_buff[SDEBUG_SENSE_LEN]; /* weak nexus */
unsigned int channel;
unsigned int target;
unsigned int lun;
struct sdebug_host_info *sdbg_host;
unsigned int wlun;
char reset;
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);
typedef void (* done_funct_t) (struct scsi_cmnd *);
struct sdebug_queued_cmd {
int in_use;
struct timer_list cmnd_timer;
done_funct_t done_funct;
struct scsi_cmnd * a_cmnd;
int scsi_result;
};
static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
static unsigned char * fake_storep; /* ramdisk storage */
static int num_aborts = 0;
static int num_dev_resets = 0;
static int num_bus_resets = 0;
static int num_host_resets = 0;
static DEFINE_SPINLOCK(queued_arr_lock);
static DEFINE_RWLOCK(atomic_rw);
static char sdebug_proc_name[] = "scsi_debug";
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 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 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 sdebug_dev_info *devip, int key,
int asc, int asq)
{
unsigned char *sbuff;
sbuff = devip->sense_buff;
memset(sbuff, 0, SDEBUG_SENSE_LEN);
scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq);
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
printk(KERN_INFO "scsi_debug: [sense_key,asc,ascq]: "
"[0x%x,0x%x,0x%x]\n", key, asc, asq);
}
static void get_data_transfer_info(unsigned char *cmd,
unsigned long long *lba, unsigned int *num)
{
switch (*cmd) {
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_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) {
printk(KERN_INFO "scsi_debug: ioctl: cmd=0x%x\n", cmd);
}
return -EINVAL;
/* return -ENOTTY; // correct return but upsets fdisk */
}
static int check_readiness(struct scsi_cmnd * SCpnt, int reset_only,
struct sdebug_dev_info * devip)
{
if (devip->reset) {
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
printk(KERN_INFO "scsi_debug: Reporting Unit "
"attention: power on reset\n");
devip->reset = 0;
mk_sense_buffer(devip, UNIT_ATTENTION, POWERON_RESET, 0);
return check_condition_result;
}
if ((0 == reset_only) && devip->stopped) {
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
printk(KERN_INFO "scsi_debug: Reporting Not "
"ready: initializing command required\n");
mk_sense_buffer(devip, NOT_READY, LOGICAL_UNIT_NOT_READY,
0x2);
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);
if (sdb->resid)
sdb->resid -= act_len;
else
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 = "0004";
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,
};
static int inquiry_evpd_84(unsigned char * arr)
{
memcpy(arr, vpd84_data, sizeof(vpd84_data));
return sizeof(vpd84_data);
}
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,
};
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,
};
static int inquiry_evpd_b0(unsigned char * arr)
{
memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
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;
}
return sizeof(vpdb0_data);
}
#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 = (unsigned char *)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(devip, 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[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 */
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 {
/* Illegal request, invalid field in cdb */
mk_sense_buffer(devip, 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] = DEV_REMOVEABLE(target) ? 0x80 : 0; /* Removable disk */
arr[2] = scsi_debug_scsi_level;
arr[3] = 2; /* response_data_format==2 */
arr[4] = SDEBUG_LONG_INQ_SZ - 5;
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] = 0x77; /* SAM-3 ANSI */
arr[60] = 0x3; arr[61] = 0x14; /* SPC-3 ANSI */
n = 62;
if (scsi_debug_ptype == 0) {
arr[n++] = 0x3; arr[n++] = 0x3d; /* SBC-2 ANSI */
} else if (scsi_debug_ptype == 1) {
arr[n++] = 0x3; arr[n++] = 0x60; /* SSC-2 no version */
}
arr[n++] = 0xc; arr[n++] = 0xf; /* SAS-1.1 rev 10 */
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 = (unsigned char *)scp->cmnd;
unsigned char arr[SDEBUG_SENSE_LEN];
int want_dsense;
int len = 18;
memset(arr, 0, sizeof(arr));
if (devip->reset == 1)
mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0);
want_dsense = !!(cmd[1] & 1) || scsi_debug_dsense;
sbuff = devip->sense_buff;
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, SDEBUG_SENSE_LEN);
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(devip, 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 = (unsigned char *)scp->cmnd;
int power_cond, errsts, start;
if ((errsts = check_readiness(scp, 1, devip)))
return errsts;
power_cond = (cmd[4] & 0xf0) >> 4;
if (power_cond) {
mk_sense_buffer(devip, 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 2048 * 1024 * scsi_debug_virtual_gb;
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;
if ((errsts = check_readiness(scp, 1, devip)))
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] = (SECT_SIZE_PER(target) >> 8) & 0xff;
arr[7] = SECT_SIZE_PER(target) & 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 = (unsigned char *)scp->cmnd;
unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
unsigned long long capac;
int errsts, k, alloc_len;
if ((errsts = check_readiness(scp, 1, devip)))
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] = (SECT_SIZE_PER(target) >> 24) & 0xff;
arr[9] = (SECT_SIZE_PER(target) >> 16) & 0xff;
arr[10] = (SECT_SIZE_PER(target) >> 8) & 0xff;
arr[11] = SECT_SIZE_PER(target) & 0xff;
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 = (unsigned char *)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] = (SECT_SIZE >> 8) & 0xff;
p[13] = SECT_SIZE & 0xff;
if (DEV_REMOVEABLE(target))
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 caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
memcpy(p, caching_pg, sizeof(caching_pg));
if (1 == pcontrol)
memset(p + 2, 0, sizeof(caching_pg) - 2);
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;
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 = (unsigned char *)scp->cmnd;
if ((errsts = check_readiness(scp, 1, devip)))
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(devip, 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] = (SECT_SIZE_PER(target) >> 8) & 0xff;
ap[7] = SECT_SIZE_PER(target) & 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] = (SECT_SIZE_PER(target) >> 24) & 0xff;
ap[13] = (SECT_SIZE_PER(target) >> 16) & 0xff;
ap[14] = (SECT_SIZE_PER(target) >> 8) & 0xff;
ap[15] = SECT_SIZE_PER(target) & 0xff;
offset += bd_len;
ap = arr + offset;
}
if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
/* TODO: Control Extension page */
mk_sense_buffer(devip, 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(devip, 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(devip, ILLEGAL_REQUEST,
INVALID_FIELD_IN_CDB, 0);
return check_condition_result;
}
offset += len;
break;
default:
mk_sense_buffer(devip, 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 = (unsigned char *)scp->cmnd;
if ((errsts = check_readiness(scp, 1, devip)))
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(devip, 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))
printk(KERN_INFO "scsi_debug: mode_select: cdb indicated=%d, "
" IO sent=%d bytes\n", 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(devip, 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(devip, 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(devip, ILLEGAL_REQUEST,
PARAMETER_LIST_LENGTH_ERR, 0);
return check_condition_result;
}
switch (mpage) {
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);
return 0;
}
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);
return 0;
}
break;
default:
break;
}
mk_sense_buffer(devip, ILLEGAL_REQUEST,
INVALID_FIELD_IN_PARAM_LIST, 0);
return check_condition_result;
}
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 = (unsigned char *)scp->cmnd;
if ((errsts = check_readiness(scp, 1, devip)))
return errsts;
memset(arr, 0, sizeof(arr));
ppc = cmd[1] & 0x2;
sp = cmd[1] & 0x1;
if (ppc || sp) {
mk_sense_buffer(devip, 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(devip, 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(devip, ILLEGAL_REQUEST,
INVALID_FIELD_IN_CDB, 0);
return check_condition_result;
}
} else {
mk_sense_buffer(devip, 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 sdebug_dev_info *devi,
unsigned long long lba, unsigned int num)
{
if (lba + num > sdebug_capacity) {
mk_sense_buffer(devi, 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(devi, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
return check_condition_result;
}
return 0;
}
static int do_device_access(struct scsi_cmnd *scmd,
struct sdebug_dev_info *devi,
unsigned long long lba, unsigned int num, int write)
{
int ret;
unsigned int block, rest = 0;
int (*func)(struct scsi_cmnd *, unsigned char *, int);
func = write ? fetch_to_dev_buffer : fill_from_dev_buffer;
block = do_div(lba, sdebug_store_sectors);
if (block + num > sdebug_store_sectors)
rest = block + num - sdebug_store_sectors;
ret = func(scmd, fake_storep + (block * SECT_SIZE),
(num - rest) * SECT_SIZE);
if (!ret && rest)
ret = func(scmd, fake_storep, rest * SECT_SIZE);
return ret;
}
static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba,
unsigned int num, struct sdebug_dev_info *devip)
{
unsigned long iflags;
int ret;
ret = check_device_access_params(devip, lba, num);
if (ret)
return ret;
if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
(lba <= OPT_MEDIUM_ERR_ADDR) &&
((lba + num) > OPT_MEDIUM_ERR_ADDR)) {
/* claim unrecoverable read error */
mk_sense_buffer(devip, MEDIUM_ERROR, UNRECOVERED_READ_ERR,
0);
/* set info field and valid bit for fixed descriptor */
if (0x70 == (devip->sense_buff[0] & 0x7f)) {
devip->sense_buff[0] |= 0x80; /* Valid bit */
ret = OPT_MEDIUM_ERR_ADDR;
devip->sense_buff[3] = (ret >> 24) & 0xff;
devip->sense_buff[4] = (ret >> 16) & 0xff;
devip->sense_buff[5] = (ret >> 8) & 0xff;
devip->sense_buff[6] = ret & 0xff;
}
return check_condition_result;
}
read_lock_irqsave(&atomic_rw, iflags);
ret = do_device_access(SCpnt, devip, lba, num, 0);
read_unlock_irqrestore(&atomic_rw, iflags);
return ret;
}
static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba,
unsigned int num, struct sdebug_dev_info *devip)
{
unsigned long iflags;
int ret;
ret = check_device_access_params(devip, lba, num);
if (ret)
return ret;
write_lock_irqsave(&atomic_rw, iflags);
ret = do_device_access(SCpnt, devip, lba, num, 1);
write_unlock_irqrestore(&atomic_rw, iflags);
if (-1 == ret)
return (DID_ERROR << 16);
else if ((ret < (num * SECT_SIZE)) &&
(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
printk(KERN_INFO "scsi_debug: write: cdb indicated=%u, "
" IO sent=%d bytes\n", num * SECT_SIZE, ret);
return 0;
}
#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, wlun, lun;
unsigned char *cmd = (unsigned char *)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(devip, 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 i, j, ret = -1;
unsigned char *kaddr, *buf;
unsigned int offset;
struct scatterlist *sg;
struct scsi_data_buffer *sdb = scsi_in(scp);
/* better not to use temporary buffer. */
buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
if (!buf)
return ret;
scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
offset = 0;
for_each_sg(sdb->table.sgl, sg, sdb->table.nents, i) {
kaddr = (unsigned char *)kmap_atomic(sg_page(sg), KM_USER0);
if (!kaddr)
goto out;
for (j = 0; j < sg->length; j++)
*(kaddr + sg->offset + j) ^= *(buf + offset + j);
offset += sg->length;
kunmap_atomic(kaddr, KM_USER0);
}
ret = 0;
out:
kfree(buf);
return ret;
}
/* When timer goes off this function is called. */
static void timer_intr_handler(unsigned long indx)
{
struct sdebug_queued_cmd * sqcp;
unsigned long iflags;
if (indx >= SCSI_DEBUG_CANQUEUE) {
printk(KERN_ERR "scsi_debug:timer_intr_handler: indx too "
"large\n");
return;
}
spin_lock_irqsave(&queued_arr_lock, iflags);
sqcp = &queued_arr[(int)indx];
if (! sqcp->in_use) {
printk(KERN_ERR "scsi_debug:timer_intr_handler: Unexpected "
"interrupt\n");
spin_unlock_irqrestore(&queued_arr_lock, iflags);
return;
}
sqcp->in_use = 0;
if (sqcp->done_funct) {
sqcp->a_cmnd->result = sqcp->scsi_result;
sqcp->done_funct(sqcp->a_cmnd); /* callback to mid level */
}
sqcp->done_funct = NULL;
spin_unlock_irqrestore(&queued_arr_lock, iflags);
}
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) {
printk(KERN_ERR "Host info NULL\n");
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",
__FUNCTION__, __LINE__);
return NULL;
}
}
open_devip->channel = sdev->channel;
open_devip->target = sdev->id;
open_devip->lun = sdev->lun;
open_devip->sdbg_host = sdbg_host;
open_devip->reset = 1;
open_devip->used = 1;
memset(open_devip->sense_buff, 0, SDEBUG_SENSE_LEN);
if (scsi_debug_dsense)
open_devip->sense_buff[0] = 0x72;
else {
open_devip->sense_buff[0] = 0x70;
open_devip->sense_buff[7] = 0xa;
}
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 %u>\n",
sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
set_bit(QUEUE_FLAG_BIDI, &sdp->request_queue->queue_flags);
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 %u>\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;
if (sdp->host->cmd_per_lun)
scsi_adjust_queue_depth(sdp, SDEBUG_TAGGED_QUEUING,
sdp->host->cmd_per_lun);
blk_queue_max_segment_size(sdp->request_queue, 256 * 1024);
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 %u>\n",
sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
if (devip) {
/* make this slot avaliable for re-use */
devip->used = 0;
sdp->hostdata = NULL;
}
}
/* Returns 1 if found 'cmnd' and deleted its timer. else returns 0 */
static int stop_queued_cmnd(struct scsi_cmnd *cmnd)
{
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];
if (sqcp->in_use && (cmnd == sqcp->a_cmnd)) {
del_timer_sync(&sqcp->cmnd_timer);
sqcp->in_use = 0;
sqcp->a_cmnd = NULL;
break;
}
}
spin_unlock_irqrestore(&queued_arr_lock, iflags);
return (k < SCSI_DEBUG_CANQUEUE) ? 1 : 0;
}
/* Deletes (stops) timers of all queued commands */
static void stop_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];
if (sqcp->in_use && sqcp->a_cmnd) {
del_timer_sync(&sqcp->cmnd_timer);
sqcp->in_use = 0;
sqcp->a_cmnd = NULL;
}
}
spin_unlock_irqrestore(&queued_arr_lock, iflags);
}
static int scsi_debug_abort(struct scsi_cmnd * SCpnt)
{
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
printk(KERN_INFO "scsi_debug: abort\n");
++num_aborts;
stop_queued_cmnd(SCpnt);
return SUCCESS;
}
static int scsi_debug_biosparam(struct scsi_device *sdev,
struct block_device * bdev, sector_t capacity, int *info)
{
int res;
unsigned char *buf;
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
printk(KERN_INFO "scsi_debug: biosparam\n");
buf = scsi_bios_ptable(bdev);
if (buf) {
res = scsi_partsize(buf, capacity,
&info[2], &info[0], &info[1]);
kfree(buf);
if (! res)
return res;
}
info[0] = sdebug_heads;
info[1] = sdebug_sectors_per;
info[2] = sdebug_cylinders_per;
return 0;
}
static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
{
struct sdebug_dev_info * devip;
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
printk(KERN_INFO "scsi_debug: device_reset\n");
++num_dev_resets;
if (SCpnt) {
devip = devInfoReg(SCpnt->device);
if (devip)
devip->reset = 1;
}
return SUCCESS;
}
static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
{
struct sdebug_host_info *sdbg_host;
struct sdebug_dev_info * dev_info;
struct scsi_device * sdp;
struct Scsi_Host * hp;
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
printk(KERN_INFO "scsi_debug: bus_reset\n");
++num_bus_resets;
if (SCpnt && ((sdp = SCpnt->device)) && ((hp = sdp->host))) {
sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
if (sdbg_host) {
list_for_each_entry(dev_info,
&sdbg_host->dev_info_list,
dev_list)
dev_info->reset = 1;
}
}
return SUCCESS;
}
static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
{
struct sdebug_host_info * sdbg_host;
struct sdebug_dev_info * dev_info;
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
printk(KERN_INFO "scsi_debug: host_reset\n");
++num_host_resets;
spin_lock(&sdebug_host_list_lock);
list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
list_for_each_entry(dev_info, &sdbg_host->dev_info_list,
dev_list)
dev_info->reset = 1;
}
spin_unlock(&sdebug_host_list_lock);
stop_all_queued();
return SUCCESS;
}
/* Initializes timers in queued array */
static void __init init_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];
init_timer(&sqcp->cmnd_timer);
sqcp->in_use = 0;
sqcp->a_cmnd = NULL;
}
spin_unlock_irqrestore(&queued_arr_lock, iflags);
}
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;
printk(KERN_WARNING "scsi_debug:build_parts: reducing "
"partitions to %d\n", 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 = start_sec;
pp->nr_sects = 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,
done_funct_t done, int scsi_result, int delta_jiff)
{
if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmnd) {
if (scsi_result) {
struct scsi_device * sdp = cmnd->device;
printk(KERN_INFO "scsi_debug: <%u %u %u %u> "
"non-zero result=0x%x\n", sdp->host->host_no,
sdp->channel, sdp->id, sdp->lun, scsi_result);
}
}
if (cmnd && devip) {
/* simulate autosense by this driver */
if (SAM_STAT_CHECK_CONDITION == (scsi_result & 0xff))
memcpy(cmnd->sense_buffer, devip->sense_buff,
(SCSI_SENSE_BUFFERSIZE > SDEBUG_SENSE_LEN) ?
SDEBUG_SENSE_LEN : SCSI_SENSE_BUFFERSIZE);
}
if (delta_jiff <= 0) {
if (cmnd)
cmnd->result = scsi_result;
if (done)
done(cmnd);
return 0;
} else {
unsigned long iflags;
int k;
struct sdebug_queued_cmd * sqcp = NULL;
spin_lock_irqsave(&queued_arr_lock, iflags);
for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
sqcp = &queued_arr[k];
if (! sqcp->in_use)
break;
}
if (k >= SCSI_DEBUG_CANQUEUE) {
spin_unlock_irqrestore(&queued_arr_lock, iflags);
printk(KERN_WARNING "scsi_debug: can_queue exceeded\n");
return 1; /* report busy to mid level */
}
sqcp->in_use = 1;
sqcp->a_cmnd = cmnd;
sqcp->scsi_result = scsi_result;
sqcp->done_funct = done;
sqcp->cmnd_timer.function = timer_intr_handler;
sqcp->cmnd_timer.data = k;
sqcp->cmnd_timer.expires = jiffies + delta_jiff;
add_timer(&sqcp->cmnd_timer);
spin_unlock_irqrestore(&queued_arr_lock, iflags);
if (cmnd)
cmnd->result = 0;
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(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(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(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
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(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
module_param_named(scsi_level, scsi_debug_scsi_level, 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_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(delay, "# of jiffies to delay response(def=1)");
MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs(def=8)");
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(max_luns, "number of LUNs per target to simulate(def=1)");
MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 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(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])");
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)");
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;
}
/* scsi_debug_proc_info
* Used if the driver currently has no own support for /proc/scsi
*/
static int scsi_debug_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset,
int length, int inout)
{
int len, pos, begin;
int orig_length;
orig_length = length;
if (inout == 1) {
char arr[16];
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", &pos))
return -EINVAL;
scsi_debug_opts = pos;
if (scsi_debug_every_nth != 0)
scsi_debug_cmnd_count = 0;
return length;
}
begin = 0;
pos = len = sprintf(buffer, "scsi_debug adapter driver, version "
"%s [%s]\n"
"num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
"every_nth=%d(curr:%d)\n"
"delay=%d, max_luns=%d, scsi_level=%d\n"
"sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
"number of aborts=%d, device_reset=%d, bus_resets=%d, "
"host_resets=%d\n",
SCSI_DEBUG_VERSION, scsi_debug_version_date, scsi_debug_num_tgts,
scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth,
scsi_debug_cmnd_count, scsi_debug_delay,
scsi_debug_max_luns, scsi_debug_scsi_level,
SECT_SIZE, sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per,
num_aborts, num_dev_resets, num_bus_resets, num_host_resets);
if (pos < offset) {
len = 0;
begin = pos;
}
*start = buffer + (offset - begin); /* Start of wanted data */
len -= (offset - begin);
if (len > length)
len = length;
return len;
}
static ssize_t sdebug_delay_show(struct device_driver * ddp, char * buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
}
static ssize_t sdebug_delay_store(struct device_driver * ddp,
const char * buf, size_t count)
{
int delay;
char work[20];
if (1 == sscanf(buf, "%10s", work)) {
if ((1 == sscanf(work, "%d", &delay)) && (delay >= 0)) {
scsi_debug_delay = delay;
return count;
}
}
return -EINVAL;
}
DRIVER_ATTR(delay, S_IRUGO | S_IWUSR, sdebug_delay_show,
sdebug_delay_store);
static ssize_t sdebug_opts_show(struct device_driver * ddp, char * buf)
{
return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
}
static ssize_t sdebug_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 == strnicmp(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;
scsi_debug_cmnd_count = 0;
return count;
}
DRIVER_ATTR(opts, S_IRUGO | S_IWUSR, sdebug_opts_show,
sdebug_opts_store);
static ssize_t sdebug_ptype_show(struct device_driver * ddp, char * buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
}
static ssize_t sdebug_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;
}
DRIVER_ATTR(ptype, S_IRUGO | S_IWUSR, sdebug_ptype_show, sdebug_ptype_store);
static ssize_t sdebug_dsense_show(struct device_driver * ddp, char * buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
}
static ssize_t sdebug_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;
}
DRIVER_ATTR(dsense, S_IRUGO | S_IWUSR, sdebug_dsense_show,
sdebug_dsense_store);
static ssize_t sdebug_fake_rw_show(struct device_driver * ddp, char * buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
}
static ssize_t sdebug_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)) {
scsi_debug_fake_rw = n;
return count;
}
return -EINVAL;
}
DRIVER_ATTR(fake_rw, S_IRUGO | S_IWUSR, sdebug_fake_rw_show,
sdebug_fake_rw_store);
static ssize_t sdebug_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 sdebug_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;
}
DRIVER_ATTR(no_lun_0, S_IRUGO | S_IWUSR, sdebug_no_lun_0_show,
sdebug_no_lun_0_store);
static ssize_t sdebug_num_tgts_show(struct device_driver * ddp, char * buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
}
static ssize_t sdebug_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;
}
DRIVER_ATTR(num_tgts, S_IRUGO | S_IWUSR, sdebug_num_tgts_show,
sdebug_num_tgts_store);
static ssize_t sdebug_dev_size_mb_show(struct device_driver * ddp, char * buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
}
DRIVER_ATTR(dev_size_mb, S_IRUGO, sdebug_dev_size_mb_show, NULL);
static ssize_t sdebug_num_parts_show(struct device_driver * ddp, char * buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
}
DRIVER_ATTR(num_parts, S_IRUGO, sdebug_num_parts_show, NULL);
static ssize_t sdebug_every_nth_show(struct device_driver * ddp, char * buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
}
static ssize_t sdebug_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;
scsi_debug_cmnd_count = 0;
return count;
}
return -EINVAL;
}
DRIVER_ATTR(every_nth, S_IRUGO | S_IWUSR, sdebug_every_nth_show,
sdebug_every_nth_store);
static ssize_t sdebug_max_luns_show(struct device_driver * ddp, char * buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
}
static ssize_t sdebug_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;
}
DRIVER_ATTR(max_luns, S_IRUGO | S_IWUSR, sdebug_max_luns_show,
sdebug_max_luns_store);
static ssize_t sdebug_scsi_level_show(struct device_driver * ddp, char * buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
}
DRIVER_ATTR(scsi_level, S_IRUGO, sdebug_scsi_level_show, NULL);
static ssize_t sdebug_virtual_gb_show(struct device_driver * ddp, char * buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb);
}
static ssize_t sdebug_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;
}
DRIVER_ATTR(virtual_gb, S_IRUGO | S_IWUSR, sdebug_virtual_gb_show,
sdebug_virtual_gb_store);
static ssize_t sdebug_add_host_show(struct device_driver * ddp, char * buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
}
static ssize_t sdebug_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;
}
DRIVER_ATTR(add_host, S_IRUGO | S_IWUSR, sdebug_add_host_show,
sdebug_add_host_store);
static ssize_t sdebug_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 sdebug_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;
}
DRIVER_ATTR(vpd_use_hostno, S_IRUGO | S_IWUSR, sdebug_vpd_use_hostno_show,
sdebug_vpd_use_hostno_store);
/* Note: The following function 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 int do_create_driverfs_files(void)
{
int ret;
ret = driver_create_file(&sdebug_driverfs_driver, &driver_attr_add_host);
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_delay);
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dsense);
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_fake_rw);
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0);
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_parts);
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_tgts);
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ptype);
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_opts);
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb);
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno);
return ret;
}
static void do_remove_driverfs_files(void)
{
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_opts);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ptype);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_tgts);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_parts);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_lun_0);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_fake_rw);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dsense);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_delay);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_add_host);
}
static void pseudo_0_release(struct device *dev)
{
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
printk(KERN_INFO "scsi_debug: pseudo_0_release() called\n");
}
static struct device pseudo_primary = {
.bus_id = "pseudo_0",
.release = pseudo_0_release,
};
static int __init scsi_debug_init(void)
{
unsigned long sz;
int host_to_add;
int k;
int ret;
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 / SECT_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);
}
fake_storep = vmalloc(sz);
if (NULL == fake_storep) {
printk(KERN_ERR "scsi_debug_init: out of memory, 1\n");
return -ENOMEM;
}
memset(fake_storep, 0, sz);
if (scsi_debug_num_parts > 0)
sdebug_build_parts(fake_storep, sz);
ret = device_register(&pseudo_primary);
if (ret < 0) {
printk(KERN_WARNING "scsi_debug: device_register error: %d\n",
ret);
goto free_vm;
}
ret = bus_register(&pseudo_lld_bus);
if (ret < 0) {
printk(KERN_WARNING "scsi_debug: bus_register error: %d\n",
ret);
goto dev_unreg;
}
ret = driver_register(&sdebug_driverfs_driver);
if (ret < 0) {
printk(KERN_WARNING "scsi_debug: driver_register error: %d\n",
ret);
goto bus_unreg;
}
ret = do_create_driverfs_files();
if (ret < 0) {
printk(KERN_WARNING "scsi_debug: driver_create_file error: %d\n",
ret);
goto del_files;
}
init_all_queued();
host_to_add = scsi_debug_add_host;
scsi_debug_add_host = 0;
for (k = 0; k < host_to_add; k++) {
if (sdebug_add_adapter()) {
printk(KERN_ERR "scsi_debug_init: "
"sdebug_add_adapter failed k=%d\n", k);
break;
}
}
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
printk(KERN_INFO "scsi_debug_init: built %d host(s)\n",
scsi_debug_add_host);
}
return 0;
del_files:
do_remove_driverfs_files();
driver_unregister(&sdebug_driverfs_driver);
bus_unreg:
bus_unregister(&pseudo_lld_bus);
dev_unreg:
device_unregister(&pseudo_primary);
free_vm:
vfree(fake_storep);
return ret;
}
static void __exit scsi_debug_exit(void)
{
int k = scsi_debug_add_host;
stop_all_queued();
for (; k; k--)
sdebug_remove_adapter();
do_remove_driverfs_files();
driver_unregister(&sdebug_driverfs_driver);
bus_unregister(&pseudo_lld_bus);
device_unregister(&pseudo_primary);
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",
__FUNCTION__, __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",
__FUNCTION__, __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;
sprintf(sdbg_host->dev.bus_id, "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, done_funct_t done)
{
unsigned char *cmd = (unsigned char *) SCpnt->cmnd;
int len, k;
unsigned int num;
unsigned long long lba;
int errsts = 0;
int target = SCpnt->device->id;
struct sdebug_dev_info *devip = NULL;
int inj_recovered = 0;
int inj_transport = 0;
int delay_override = 0;
scsi_set_resid(SCpnt, 0);
if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmd) {
printk(KERN_INFO "scsi_debug: cmd ");
for (k = 0, len = SCpnt->cmd_len; k < len; ++k)
printk("%02x ", (int)cmd[k]);
printk("\n");
}
if (target == SCpnt->device->host->hostt->this_id) {
printk(KERN_INFO "scsi_debug: initiator's id used as "
"target!\n");
return schedule_resp(SCpnt, NULL, done,
DID_NO_CONNECT << 16, 0);
}
if ((SCpnt->device->lun >= scsi_debug_max_luns) &&
(SCpnt->device->lun != SAM2_WLUN_REPORT_LUNS))
return schedule_resp(SCpnt, NULL, done,
DID_NO_CONNECT << 16, 0);
devip = devInfoReg(SCpnt->device);
if (NULL == devip)
return schedule_resp(SCpnt, NULL, done,
DID_NO_CONNECT << 16, 0);
if ((scsi_debug_every_nth != 0) &&
(++scsi_debug_cmnd_count >= abs(scsi_debug_every_nth))) {
scsi_debug_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_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 */
}
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(devip, ILLEGAL_REQUEST,
INVALID_OPCODE, 0);
errsts = check_condition_result;
return schedule_resp(SCpnt, devip, done, 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, 1, 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, 1, devip);
break;
case TEST_UNIT_READY: /* mandatory */
delay_override = 1;
errsts = check_readiness(SCpnt, 0, devip);
break;
case RESERVE:
errsts = check_readiness(SCpnt, 1, devip);
break;
case RESERVE_10:
errsts = check_readiness(SCpnt, 1, devip);
break;
case RELEASE:
errsts = check_readiness(SCpnt, 1, devip);
break;
case RELEASE_10:
errsts = check_readiness(SCpnt, 1, devip);
break;
case READ_CAPACITY:
errsts = resp_readcap(SCpnt, devip);
break;
case SERVICE_ACTION_IN:
if (SAI_READ_CAPACITY_16 != cmd[1]) {
mk_sense_buffer(devip, ILLEGAL_REQUEST,
INVALID_OPCODE, 0);
errsts = check_condition_result;
break;
}
errsts = resp_readcap16(SCpnt, devip);
break;
case MAINTENANCE_IN:
if (MI_REPORT_TARGET_PGS != cmd[1]) {
mk_sense_buffer(devip, 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:
case READ_6:
errsts = check_readiness(SCpnt, 0, devip);
if (errsts)
break;
if (scsi_debug_fake_rw)
break;
get_data_transfer_info(cmd, &lba, &num);
errsts = resp_read(SCpnt, lba, num, devip);
if (inj_recovered && (0 == errsts)) {
mk_sense_buffer(devip, RECOVERED_ERROR,
THRESHOLD_EXCEEDED, 0);
errsts = check_condition_result;
} else if (inj_transport && (0 == errsts)) {
mk_sense_buffer(devip, ABORTED_COMMAND,
TRANSPORT_PROBLEM, ACK_NAK_TO);
errsts = check_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, 0, devip);
break;
case WRITE_16:
case WRITE_12:
case WRITE_10:
case WRITE_6:
errsts = check_readiness(SCpnt, 0, devip);
if (errsts)
break;
if (scsi_debug_fake_rw)
break;
get_data_transfer_info(cmd, &lba, &num);
errsts = resp_write(SCpnt, lba, num, devip);
if (inj_recovered && (0 == errsts)) {
mk_sense_buffer(devip, RECOVERED_ERROR,
THRESHOLD_EXCEEDED, 0);
errsts = check_condition_result;
}
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, 0, devip);
break;
case WRITE_BUFFER:
errsts = check_readiness(SCpnt, 1, devip);
break;
case XDWRITEREAD_10:
if (!scsi_bidi_cmnd(SCpnt)) {
mk_sense_buffer(devip, ILLEGAL_REQUEST,
INVALID_FIELD_IN_CDB, 0);
errsts = check_condition_result;
break;
}
errsts = check_readiness(SCpnt, 0, devip);
if (errsts)
break;
if (scsi_debug_fake_rw)
break;
get_data_transfer_info(cmd, &lba, &num);
errsts = resp_read(SCpnt, lba, num, devip);
if (errsts)
break;
errsts = resp_write(SCpnt, lba, num, devip);
if (errsts)
break;
errsts = resp_xdwriteread(SCpnt, lba, num, devip);
break;
default:
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
printk(KERN_INFO "scsi_debug: Opcode: 0x%x not "
"supported\n", *cmd);
errsts = check_readiness(SCpnt, 1, devip);
if (errsts)
break; /* Unit attention takes precedence */
mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
errsts = check_condition_result;
break;
}
return schedule_resp(SCpnt, devip, done, errsts,
(delay_override ? 0 : scsi_debug_delay));
}
static struct scsi_host_template sdebug_driver_template = {
.proc_info = scsi_debug_proc_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 = scsi_debug_queuecommand,
.eh_abort_handler = scsi_debug_abort,
.eh_bus_reset_handler = scsi_debug_bus_reset,
.eh_device_reset_handler = scsi_debug_device_reset,
.eh_host_reset_handler = scsi_debug_host_reset,
.bios_param = scsi_debug_biosparam,
.can_queue = SCSI_DEBUG_CANQUEUE,
.this_id = 7,
.sg_tablesize = 256,
.cmd_per_lun = 16,
.max_sectors = 0xffff,
.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;
sdbg_host = to_sdebug_host(dev);
hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
if (NULL == hpnt) {
printk(KERN_ERR "%s: scsi_register failed\n", __FUNCTION__);
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; */
error = scsi_add_host(hpnt, &sdbg_host->dev);
if (error) {
printk(KERN_ERR "%s: scsi_add_host failed\n", __FUNCTION__);
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",
__FUNCTION__);
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,
};
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