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Commit 6f74a1eb authored by Douglas Gilbert's avatar Douglas Gilbert Committed by James Bottomley
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Changes: 

   - add SYNCHRONIZE_CACHE command support
   - clean up module removal noise
   - add some more parameters for driverfs

merges work from Patrick
Mansfield. There are now options to set:
   - max_luns (default 2)
   - scsi_level (default 3)

Now if multiple scsi_debug pseudo devices are selected
they will get these tuples (assuming "2" is the next
available host number):
   2 0 0 0
   2 0 0 1
   2 0 1 0
   2 0 1 1
   2 0 2 0
   ...
   2 0 7 1
   3 0 0 0
   3 0 0 1
etc
parent d17310ca
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Showing with 101 additions and 18 deletions
drivers/scsi/scsi_debug.c
View file @ 6f74a1eb
......@@ -17,6 +17,7 @@
* 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]
*/
#include <linux/config.h>
......@@ -49,7 +50,7 @@
#include "scsi_debug.h"
static const char * scsi_debug_version_str = "Version: 1.62 (20020812)";
static const char * scsi_debug_version_str = "Version: 1.63 (20021031)";
#define DRIVERFS_SUPPORT 1 /* comment out whole line to disable */
......@@ -60,9 +61,6 @@ static const char * scsi_debug_version_str = "Version: 1.62 (20020812)";
#ifndef SCSI_CMD_WRITE_16
#define SCSI_CMD_WRITE_16 0x8a
#endif
#ifndef REPORT_LUNS
#define REPORT_LUNS 0xa0
#endif
/* A few options that we want selected */
#define DEF_NR_FAKE_DEVS 1
......@@ -70,6 +68,8 @@ static const char * scsi_debug_version_str = "Version: 1.62 (20020812)";
#define DEF_FAKE_BLK0 0
#define DEF_EVERY_NTH 100
#define DEF_DELAY 1
#define DEF_MAX_LUNS 2
#define DEF_SCSI_LEVEL 3
#define DEF_OPTS 0
#define SCSI_DEBUG_OPT_NOISE 1
......@@ -83,6 +83,8 @@ static int scsi_debug_opts = DEF_OPTS;
static int scsi_debug_every_nth = DEF_EVERY_NTH;
static int scsi_debug_cmnd_count = 0;
static int scsi_debug_delay = DEF_DELAY;
static int scsi_debug_max_luns = DEF_MAX_LUNS;
static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
#define NR_HOSTS_PRESENT (((scsi_debug_num_devs - 1) / 7) + 1)
#define N_HEAD 8
......@@ -131,7 +133,7 @@ static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
static unsigned char * fake_storep; /* ramdisk storage */
static unsigned char broken_buff[SDEBUG_SENSE_LEN];
static unsigned char spare_buff[SDEBUG_SENSE_LEN];
static int num_aborts = 0;
static int num_dev_resets = 0;
......@@ -215,8 +217,7 @@ int scsi_debug_queuecommand(Scsi_Cmnd * SCpnt, done_funct_t done)
else
buff = (unsigned char *) SCpnt->request_buffer;
if (NULL == buff) {
printk(KERN_WARNING "scsi_debug:qc: buff was NULL??\n");
buff = broken_buff; /* just point at dummy */
buff = spare_buff; /* assume cmd moves no data */
bufflen = SDEBUG_SENSE_LEN;
}
......@@ -226,7 +227,7 @@ int scsi_debug_queuecommand(Scsi_Cmnd * SCpnt, done_funct_t done)
return schedule_resp(SCpnt, NULL, done, 0, 0);
}
if (SCpnt->lun != 0)
if (SCpnt->lun >= scsi_debug_max_luns)
return schedule_resp(SCpnt, NULL, done,
DID_NO_CONNECT << 16, 0);
#if 0
......@@ -380,6 +381,9 @@ int scsi_debug_queuecommand(Scsi_Cmnd * SCpnt, done_funct_t done)
case MODE_SENSE_10:
errsts = resp_mode_sense(cmd, target, buff, bufflen, devip);
break;
case SYNCHRONIZE_CACHE:
memset(buff, 0, bufflen);
break;
default:
#if 0
printk(KERN_INFO "scsi_debug: Unsupported command, "
......@@ -474,8 +478,8 @@ static int resp_inquiry(unsigned char * cmd, int target, unsigned char * buff,
int dev_id_num, len;
char dev_id_str[6];
dev_id_num = ((devip->host->host_no + 1) * 1000) +
devip->target;
dev_id_num = ((devip->host->host_no + 1) * 2000) +
(devip->target * 1000) + devip->lun;
len = snprintf(dev_id_str, 6, "%d", dev_id_num);
len = (len > 6) ? 6 : len;
if (0 == cmd[2]) { /* supported vital product data pages */
......@@ -501,7 +505,7 @@ static int resp_inquiry(unsigned char * cmd, int target, unsigned char * buff,
}
/* drops through here for a standard inquiry */
arr[1] = DEV_REMOVEABLE(target) ? 0x80 : 0; /* Removable disk */
arr[2] = 3; /* claim SCSI 3 */
arr[2] = scsi_debug_scsi_level;
arr[4] = SDEBUG_LONG_INQ_SZ - 5;
arr[7] = 0x3a; /* claim: WBUS16, SYNC, LINKED + CMDQUE */
memcpy(&arr[8], vendor_id, 8);
......@@ -643,6 +647,7 @@ static int resp_mode_sense(unsigned char * cmd, int target,
case 0x3f: /* Read all Mode pages */
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);
offset += len;
......@@ -756,8 +761,9 @@ static int resp_write(Scsi_Cmnd * SCpnt, int upper_blk, int block, int num,
static int resp_report_luns(unsigned char * cmd, unsigned char * buff,
int bufflen, struct sdebug_dev_info * devip)
{
unsigned int alloc_len;
unsigned int alloc_len, lun_cnt, i;
int select_report = (int)cmd[2];
ScsiLun *one_lun;
alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
if ((alloc_len < 16) || (select_report > 2)) {
......@@ -765,8 +771,13 @@ static int resp_report_luns(unsigned char * cmd, unsigned char * buff,
return (COMMAND_COMPLETE << 8) | (CHECK_CONDITION << 1);
}
if (bufflen > 3) {
lun_cnt = min((int)(bufflen / sizeof(ScsiLun)),
(int)scsi_debug_max_luns);
memset(buff, 0, bufflen);
buff[3] = 8;
buff[3] = 8 * lun_cnt;
one_lun = (ScsiLun*) &buff[0];
for (i = 0; i < lun_cnt; i++)
one_lun[i].scsi_lun[1] = i;
}
return 0;
}
......@@ -804,6 +815,7 @@ static const char * sdebug_proc_name = "scsi_debug";
static int scsi_debug_detect(Scsi_Host_Template * tpnt)
{
int k, sz;
struct Scsi_Host * hpnt;
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
printk(KERN_INFO "scsi_debug: detect\n");
......@@ -828,11 +840,13 @@ static int scsi_debug_detect(Scsi_Host_Template * tpnt)
init_all_queued();
tpnt->proc_name = (char *)sdebug_proc_name;
for (num_present = 0, k = 0; k < NR_HOSTS_PRESENT; k++) {
if (NULL == scsi_register(tpnt, 0))
if ((hpnt = scsi_register(tpnt, 0)) == NULL)
printk(KERN_ERR "scsi_debug_detect: "
"scsi_register failed k=%d\n", k);
else
else {
hpnt->max_lun = scsi_debug_max_luns;
++num_present;
}
}
#ifdef DRIVERFS_SUPPORT
if (num_present) {
......@@ -1113,6 +1127,38 @@ static int __init num_devs_setup(char *str)
}
__setup("scsi_debug_num_devs=", num_devs_setup);
static int __init max_luns_setup(char *str)
{
int tmp;
if (get_option(&str, &tmp) == 1) {
if (tmp > 0)
scsi_debug_max_luns = tmp;
return 1;
} else {
printk(KERN_INFO "scsi_debug_max_luns: usage scsi_debug_max_luns=<n> "
"(<n> is a postive integer (def=2))\n");
return 0;
}
}
__setup("scsi_debug_max_luns=", max_luns_setup);
static int __init scsi_level_setup(char *str)
{
int tmp;
if (get_option(&str, &tmp) == 1) {
if (tmp > 0)
scsi_debug_scsi_level = tmp;
return 1;
} else {
printk(KERN_INFO "scsi_debug_scsi_level: usage "
"scsi_debug_scsi_level=<n> (<n> is 1..4 (def=3))\n");
return 0;
}
}
__setup("scsi_debug_scsi_level=", scsi_level_setup);
static int __init dev_size_mb_setup(char *str)
{
int tmp;
......@@ -1186,6 +1232,10 @@ MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
MODULE_DESCRIPTION("SCSI debug adapter driver");
MODULE_PARM(scsi_debug_num_devs, "i");
MODULE_PARM_DESC(scsi_debug_num_devs, "number of SCSI devices to simulate");
MODULE_PARM(scsi_debug_max_luns, "i");
MODULE_PARM_DESC(scsi_debug_max_luns, "number of SCSI LUNs per target to simulate");
MODULE_PARM(scsi_debug_scsi_level, "i");
MODULE_PARM_DESC(scsi_debug_scsi_level, "SCSI level to simulate");
MODULE_PARM(scsi_debug_dev_size_mb, "i");
MODULE_PARM_DESC(scsi_debug_dev_size_mb, "size in MB of ram shared by devs");
MODULE_PARM(scsi_debug_opts, "i");
......@@ -1280,7 +1330,6 @@ static ssize_t sdebug_delay_write(struct device_driver * ddp,
}
return -EINVAL;
}
DRIVER_ATTR(delay, S_IRUGO | S_IWUSR, sdebug_delay_read,
sdebug_delay_write)
......@@ -1312,7 +1361,6 @@ static ssize_t sdebug_opts_write(struct device_driver * ddp,
scsi_debug_opts = opts;
return count;
}
DRIVER_ATTR(opts, S_IRUGO | S_IWUSR, sdebug_opts_read,
sdebug_opts_write)
......@@ -1321,18 +1369,53 @@ static ssize_t sdebug_num_devs_read(struct device_driver * ddp, char * buf,
{
return off ? 0 : snprintf(buf, count, "%d\n", scsi_debug_num_devs);
}
DRIVER_ATTR(num_devs, S_IRUGO, sdebug_num_devs_read, NULL)
static ssize_t sdebug_dev_size_mb_read(struct device_driver * ddp, char * buf,
size_t count, loff_t off)
{
return off ? 0 : snprintf(buf, count, "%d\n", scsi_debug_dev_size_mb);
}
DRIVER_ATTR(dev_size_mb, S_IRUGO, sdebug_dev_size_mb_read, NULL)
static ssize_t sdebug_every_nth_read(struct device_driver * ddp, char * buf,
size_t count, loff_t off)
{
return off ? 0 : snprintf(buf, count, "%d\n", scsi_debug_every_nth);
}
DRIVER_ATTR(every_nth, S_IRUGO, sdebug_every_nth_read, NULL)
static ssize_t sdebug_max_luns_read(struct device_driver * ddp, char * buf,
size_t count, loff_t off)
{
return off ? 0 : snprintf(buf, count, "%d\n", scsi_debug_max_luns);
}
DRIVER_ATTR(max_luns, S_IRUGO, sdebug_max_luns_read, NULL)
static ssize_t sdebug_scsi_level_read(struct device_driver * ddp, char * buf,
size_t count, loff_t off)
{
return off ? 0 : snprintf(buf, count, "%d\n", scsi_debug_scsi_level);
}
DRIVER_ATTR(scsi_level, S_IRUGO, sdebug_scsi_level_read, NULL)
static void do_create_driverfs_files()
{
driver_create_file(&sdebug_driverfs_driver, &driver_attr_delay);
driver_create_file(&sdebug_driverfs_driver, &driver_attr_opts);
driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_devs);
driver_create_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
driver_create_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
driver_create_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
}
static void do_remove_driverfs_files()
{
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_devs);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_opts);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_delay);
......
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