blob: 238e06f13b8a1c977146699d95f1783bbef571e7 [file] [log] [blame]
/*
* vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
* Copyright (C) 1992 Eric Youngdale
* Simulate a host adapter with 2 disks attached. Do a lot of checking
* to make sure that we are not getting blocks mixed up, and PANIC if
* anything out of the ordinary is seen.
* ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
*
* 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);