[SCSI] scsi_debug version 1.80 (23183910) · Commits · 戴 / test

drivers/scsi/scsi_debug.c

+189 −41

Original line number	Diff line number	Diff line
		/*
		* linux/kernel/scsi_debug.c
		* vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
		* Copyright (C) 1992 Eric Youngdale
		* Simulate a host adapter with 2 disks attached. Do a lot of checking
		@@ -8,7 +7,9 @@
		* ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
		*
		* This version is more generic, simulating a variable number of disk
		* (or disk like devices) sharing a common amount of RAM
		* (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
		@@ -50,8 +51,8 @@
		#include "scsi_logging.h"
		#include "scsi_debug.h"

		#define SCSI_DEBUG_VERSION "1.79"
		static const char * scsi_debug_version_date = "20060604";
		#define SCSI_DEBUG_VERSION "1.80"
		static const char * scsi_debug_version_date = "20060914";

		/* Additional Sense Code (ASC) used */
		#define NO_ADDITIONAL_SENSE 0x0
		@@ -86,6 +87,8 @@ static const char * scsi_debug_version_date = "20060604";
		#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
		@@ -127,6 +130,8 @@ 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;

		@@ -423,6 +428,8 @@ int scsi_debug_queuecommand(struct scsi_cmnd * SCpnt, done_funct_t done)
		case READ_6:
		if ((errsts = check_readiness(SCpnt, 0, devip)))
		break;
		if (scsi_debug_fake_rw)
		break;
		if ((*cmd) == READ_16) {
		for (lba = 0, j = 0; j < 8; ++j) {
		if (j > 0)
		@@ -465,6 +472,8 @@ int scsi_debug_queuecommand(struct scsi_cmnd * SCpnt, done_funct_t done)
		case WRITE_6:
		if ((errsts = check_readiness(SCpnt, 0, devip)))
		break;
		if (scsi_debug_fake_rw)
		break;
		if ((*cmd) == WRITE_16) {
		for (lba = 0, j = 0; j < 8; ++j) {
		if (j > 0)
		@@ -941,6 +950,8 @@ static int resp_inquiry(struct scsi_cmnd * scp, int target,
		char lu_id_str[6];
		int host_no = devip->sdbg_host->shost->host_no;

		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) +
		@@ -1059,19 +1070,6 @@ static int resp_requests(struct scsi_cmnd * scp,
		arr[12] = THRESHOLD_EXCEEDED;
		arr[13] = 0xff; /* TEST set and MRIE==6 */
		}
		} else if (devip->stopped) {
		if (want_dsense) {
		arr[0] = 0x72;
		arr[1] = 0x0; /* NO_SENSE in sense_key */
		arr[2] = LOW_POWER_COND_ON;
		arr[3] = 0x0; /* 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] = LOW_POWER_COND_ON;
		arr[13] = 0x0; /* TEST set and MRIE==6 */
		}
		} else {
		memcpy(arr, sbuff, SDEBUG_SENSE_LEN);
		if ((cmd[1] & 1) && (! scsi_debug_dsense)) {
		@@ -1325,21 +1323,26 @@ static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
		static int resp_mode_sense(struct scsi_cmnd * scp, int target,
		struct sdebug_dev_info * devip)
		{
		unsigned char dbd;
		int pcontrol, pcode, subpcode;
		unsigned char dbd, llbaa;
		int pcontrol, pcode, subpcode, bd_len;
		unsigned char dev_spec;
		int alloc_len, msense_6, offset, len, errsts, target_dev_id;
		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;
		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 */
		@@ -1349,15 +1352,58 @@ static int resp_mode_sense(struct scsi_cmnd * scp, int target,
		}
		target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
		(devip->target * 1000) - 3;
		dev_spec = DEV_READONLY(target) ? 0x80 : 0x0;
		/* 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) && (0 == sdebug_capacity)) {
		if (scsi_debug_virtual_gb > 0) {
		sdebug_capacity = 2048 * 1024;
		sdebug_capacity *= scsi_debug_virtual_gb;
		} else
		sdebug_capacity = sdebug_store_sectors;
		}
		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 */
		@@ -1471,7 +1517,7 @@ static int resp_mode_select(struct scsi_cmnd * scp, int mselect6,
		" 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) \|\| (0 != bd_len)) {
		if (md_len > 2) {
		mk_sense_buffer(devip, ILLEGAL_REQUEST,
		INVALID_FIELD_IN_PARAM_LIST, 0);
		return check_condition_result;
		@@ -1544,7 +1590,7 @@ static int resp_ie_l_pg(unsigned char * arr)
		static int resp_log_sense(struct scsi_cmnd * scp,
		struct sdebug_dev_info * devip)
		{
		int ppc, sp, pcontrol, pcode, alloc_len, errsts, len, n;
		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;

		@@ -1560,8 +1606,10 @@ static int resp_log_sense(struct scsi_cmnd * scp,
		}
		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;
		@@ -1581,6 +1629,44 @@ static int resp_log_sense(struct scsi_cmnd * scp,
		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));
		@@ -2151,11 +2237,18 @@ static int schedule_resp(struct scsi_cmnd * cmnd,
		}
		}

		/* 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);
		@@ -2164,6 +2257,8 @@ 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");
		@@ -2175,6 +2270,7 @@ 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=100)");
		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)");
		@@ -2183,6 +2279,7 @@ MODULE_PARM_DESC(opts, "1->noise, 2->medium_error, 4->... (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];
		@@ -2334,6 +2431,24 @@ static ssize_t sdebug_dsense_store(struct device_driver * ddp,
		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);
		@@ -2487,6 +2602,31 @@ static ssize_t sdebug_add_host_store(struct device_driver * ddp,
		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;
		@@ -2496,23 +2636,31 @@ static int do_create_driverfs_files(void)
		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_num_tgts);
		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_parts);
		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);

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