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[SCSI] scsi_debug version 1.80
See http://www.torque.net/sg/sdebug26.html for more information on the scsi_debug driver. ChangeLog: - add 'vpd_use_hostno' parameter to allow simulated hosts to see the same set of targets (and luns). For testing multipath software. - add 'fake_rw' parameter to ignore the data in READ and WRITE commands - add support for log subpages (new in SPC-4) - yield appropriate block descriptor for MODE SENSE commands (only for pdt=0 (i.e. disks)) - REQUEST SENSE response no longer shows the stopped power condition (SAT changed to agree with SPC-3) Signed-off-by: Douglas Gilbert <dougg@torque.net> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Douglas Gilbert
James Bottomley
parent
c9802cd957
commit
231839102b
@ -1,5 +1,4 @@
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/*
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* linux/kernel/scsi_debug.c
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* vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
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* Copyright (C) 1992 Eric Youngdale
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* Simulate a host adapter with 2 disks attached. Do a lot of checking
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@ -8,7 +7,9 @@
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* ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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*
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* This version is more generic, simulating a variable number of disk
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* (or disk like devices) sharing a common amount of RAM
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* (or disk like devices) sharing a common amount of RAM. To be more
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* realistic, the simulated devices have the transport attributes of
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* SAS disks.
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*
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*
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* For documentation see http://www.torque.net/sg/sdebug26.html
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@ -50,8 +51,8 @@
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#include "scsi_logging.h"
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#include "scsi_debug.h"
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#define SCSI_DEBUG_VERSION "1.79"
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static const char * scsi_debug_version_date = "20060604";
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#define SCSI_DEBUG_VERSION "1.80"
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static const char * scsi_debug_version_date = "20060914";
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/* Additional Sense Code (ASC) used */
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#define NO_ADDITIONAL_SENSE 0x0
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@ -86,6 +87,8 @@ static const char * scsi_debug_version_date = "20060604";
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#define DEF_D_SENSE 0
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#define DEF_NO_LUN_0 0
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#define DEF_VIRTUAL_GB 0
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#define DEF_FAKE_RW 0
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#define DEF_VPD_USE_HOSTNO 1
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/* bit mask values for scsi_debug_opts */
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#define SCSI_DEBUG_OPT_NOISE 1
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@ -127,6 +130,8 @@ static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
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static int scsi_debug_dsense = DEF_D_SENSE;
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static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
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static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
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static int scsi_debug_fake_rw = DEF_FAKE_RW;
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static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
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static int scsi_debug_cmnd_count = 0;
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@ -423,6 +428,8 @@ int scsi_debug_queuecommand(struct scsi_cmnd * SCpnt, done_funct_t done)
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case READ_6:
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if ((errsts = check_readiness(SCpnt, 0, devip)))
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break;
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if (scsi_debug_fake_rw)
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break;
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if ((*cmd) == READ_16) {
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for (lba = 0, j = 0; j < 8; ++j) {
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if (j > 0)
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@ -465,6 +472,8 @@ int scsi_debug_queuecommand(struct scsi_cmnd * SCpnt, done_funct_t done)
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case WRITE_6:
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if ((errsts = check_readiness(SCpnt, 0, devip)))
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break;
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if (scsi_debug_fake_rw)
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break;
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if ((*cmd) == WRITE_16) {
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for (lba = 0, j = 0; j < 8; ++j) {
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if (j > 0)
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@ -941,6 +950,8 @@ static int resp_inquiry(struct scsi_cmnd * scp, int target,
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char lu_id_str[6];
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int host_no = devip->sdbg_host->shost->host_no;
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if (0 == scsi_debug_vpd_use_hostno)
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host_no = 0;
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lu_id_num = devip->wlun ? -1 : (((host_no + 1) * 2000) +
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(devip->target * 1000) + devip->lun);
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target_dev_id = ((host_no + 1) * 2000) +
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@ -1059,19 +1070,6 @@ static int resp_requests(struct scsi_cmnd * scp,
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arr[12] = THRESHOLD_EXCEEDED;
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arr[13] = 0xff; /* TEST set and MRIE==6 */
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}
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} else if (devip->stopped) {
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if (want_dsense) {
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arr[0] = 0x72;
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arr[1] = 0x0; /* NO_SENSE in sense_key */
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arr[2] = LOW_POWER_COND_ON;
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arr[3] = 0x0; /* TEST set and MRIE==6 */
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} else {
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arr[0] = 0x70;
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arr[2] = 0x0; /* NO_SENSE in sense_key */
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arr[7] = 0xa; /* 18 byte sense buffer */
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arr[12] = LOW_POWER_COND_ON;
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arr[13] = 0x0; /* TEST set and MRIE==6 */
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}
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} else {
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memcpy(arr, sbuff, SDEBUG_SENSE_LEN);
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if ((cmd[1] & 1) && (! scsi_debug_dsense)) {
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@ -1325,21 +1323,26 @@ static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
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static int resp_mode_sense(struct scsi_cmnd * scp, int target,
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struct sdebug_dev_info * devip)
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{
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unsigned char dbd;
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int pcontrol, pcode, subpcode;
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unsigned char dbd, llbaa;
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int pcontrol, pcode, subpcode, bd_len;
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unsigned char dev_spec;
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int alloc_len, msense_6, offset, len, errsts, target_dev_id;
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int k, alloc_len, msense_6, offset, len, errsts, target_dev_id;
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unsigned char * ap;
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unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
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unsigned char *cmd = (unsigned char *)scp->cmnd;
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if ((errsts = check_readiness(scp, 1, devip)))
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return errsts;
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dbd = cmd[1] & 0x8;
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dbd = !!(cmd[1] & 0x8);
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pcontrol = (cmd[2] & 0xc0) >> 6;
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pcode = cmd[2] & 0x3f;
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subpcode = cmd[3];
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msense_6 = (MODE_SENSE == cmd[0]);
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llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10);
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if ((0 == scsi_debug_ptype) && (0 == dbd))
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bd_len = llbaa ? 16 : 8;
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else
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bd_len = 0;
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alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
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memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
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if (0x3 == pcontrol) { /* Saving values not supported */
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@ -1349,15 +1352,58 @@ static int resp_mode_sense(struct scsi_cmnd * scp, int target,
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}
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target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
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(devip->target * 1000) - 3;
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dev_spec = DEV_READONLY(target) ? 0x80 : 0x0;
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/* set DPOFUA bit for disks */
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if (0 == scsi_debug_ptype)
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dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10;
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else
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dev_spec = 0x0;
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if (msense_6) {
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arr[2] = dev_spec;
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arr[3] = bd_len;
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offset = 4;
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} else {
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arr[3] = dev_spec;
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if (16 == bd_len)
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arr[4] = 0x1; /* set LONGLBA bit */
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arr[7] = bd_len; /* assume 255 or less */
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offset = 8;
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}
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ap = arr + offset;
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if ((bd_len > 0) && (0 == sdebug_capacity)) {
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if (scsi_debug_virtual_gb > 0) {
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sdebug_capacity = 2048 * 1024;
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sdebug_capacity *= scsi_debug_virtual_gb;
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} else
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sdebug_capacity = sdebug_store_sectors;
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}
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if (8 == bd_len) {
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if (sdebug_capacity > 0xfffffffe) {
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ap[0] = 0xff;
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ap[1] = 0xff;
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ap[2] = 0xff;
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ap[3] = 0xff;
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} else {
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ap[0] = (sdebug_capacity >> 24) & 0xff;
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ap[1] = (sdebug_capacity >> 16) & 0xff;
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ap[2] = (sdebug_capacity >> 8) & 0xff;
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ap[3] = sdebug_capacity & 0xff;
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}
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ap[6] = (SECT_SIZE_PER(target) >> 8) & 0xff;
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ap[7] = SECT_SIZE_PER(target) & 0xff;
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offset += bd_len;
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ap = arr + offset;
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} else if (16 == bd_len) {
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unsigned long long capac = sdebug_capacity;
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for (k = 0; k < 8; ++k, capac >>= 8)
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ap[7 - k] = capac & 0xff;
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ap[12] = (SECT_SIZE_PER(target) >> 24) & 0xff;
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ap[13] = (SECT_SIZE_PER(target) >> 16) & 0xff;
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ap[14] = (SECT_SIZE_PER(target) >> 8) & 0xff;
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ap[15] = SECT_SIZE_PER(target) & 0xff;
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offset += bd_len;
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ap = arr + offset;
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}
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if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
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/* TODO: Control Extension page */
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@ -1471,7 +1517,7 @@ static int resp_mode_select(struct scsi_cmnd * scp, int mselect6,
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" IO sent=%d bytes\n", param_len, res);
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md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2);
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bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]);
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if ((md_len > 2) || (0 != bd_len)) {
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if (md_len > 2) {
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mk_sense_buffer(devip, ILLEGAL_REQUEST,
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INVALID_FIELD_IN_PARAM_LIST, 0);
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return check_condition_result;
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@ -1544,7 +1590,7 @@ static int resp_ie_l_pg(unsigned char * arr)
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static int resp_log_sense(struct scsi_cmnd * scp,
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struct sdebug_dev_info * devip)
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{
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int ppc, sp, pcontrol, pcode, alloc_len, errsts, len, n;
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int ppc, sp, pcontrol, pcode, subpcode, alloc_len, errsts, len, n;
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unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
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unsigned char *cmd = (unsigned char *)scp->cmnd;
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@ -1560,23 +1606,63 @@ static int resp_log_sense(struct scsi_cmnd * scp,
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}
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pcontrol = (cmd[2] & 0xc0) >> 6;
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pcode = cmd[2] & 0x3f;
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subpcode = cmd[3] & 0xff;
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alloc_len = (cmd[7] << 8) + cmd[8];
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arr[0] = pcode;
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switch (pcode) {
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case 0x0: /* Supported log pages log page */
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n = 4;
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arr[n++] = 0x0; /* this page */
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arr[n++] = 0xd; /* Temperature */
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arr[n++] = 0x2f; /* Informational exceptions */
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arr[3] = n - 4;
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break;
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case 0xd: /* Temperature log page */
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arr[3] = resp_temp_l_pg(arr + 4);
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break;
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case 0x2f: /* Informational exceptions log page */
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arr[3] = resp_ie_l_pg(arr + 4);
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break;
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default:
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if (0 == subpcode) {
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switch (pcode) {
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case 0x0: /* Supported log pages log page */
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n = 4;
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arr[n++] = 0x0; /* this page */
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arr[n++] = 0xd; /* Temperature */
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arr[n++] = 0x2f; /* Informational exceptions */
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arr[3] = n - 4;
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break;
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case 0xd: /* Temperature log page */
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arr[3] = resp_temp_l_pg(arr + 4);
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break;
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case 0x2f: /* Informational exceptions log page */
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arr[3] = resp_ie_l_pg(arr + 4);
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break;
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default:
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mk_sense_buffer(devip, ILLEGAL_REQUEST,
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INVALID_FIELD_IN_CDB, 0);
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return check_condition_result;
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}
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} else if (0xff == subpcode) {
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arr[0] |= 0x40;
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arr[1] = subpcode;
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switch (pcode) {
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case 0x0: /* Supported log pages and subpages log page */
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n = 4;
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arr[n++] = 0x0;
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arr[n++] = 0x0; /* 0,0 page */
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arr[n++] = 0x0;
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arr[n++] = 0xff; /* this page */
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arr[n++] = 0xd;
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arr[n++] = 0x0; /* Temperature */
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arr[n++] = 0x2f;
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arr[n++] = 0x0; /* Informational exceptions */
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arr[3] = n - 4;
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break;
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case 0xd: /* Temperature subpages */
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n = 4;
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arr[n++] = 0xd;
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arr[n++] = 0x0; /* Temperature */
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arr[3] = n - 4;
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break;
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case 0x2f: /* Informational exceptions subpages */
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n = 4;
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arr[n++] = 0x2f;
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arr[n++] = 0x0; /* Informational exceptions */
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arr[3] = n - 4;
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break;
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default:
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mk_sense_buffer(devip, ILLEGAL_REQUEST,
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INVALID_FIELD_IN_CDB, 0);
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return check_condition_result;
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}
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} else {
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mk_sense_buffer(devip, ILLEGAL_REQUEST,
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INVALID_FIELD_IN_CDB, 0);
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return check_condition_result;
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@ -2151,11 +2237,18 @@ static int schedule_resp(struct scsi_cmnd * cmnd,
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}
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}
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/* Note: The following macros create attribute files in the
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/sys/module/scsi_debug/parameters directory. Unfortunately this
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driver is unaware of a change and cannot trigger auxiliary actions
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as it can when the corresponding attribute in the
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/sys/bus/pseudo/drivers/scsi_debug directory is changed.
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*/
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module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
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module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
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module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
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module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR);
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module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR);
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module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR);
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module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
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module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
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module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO);
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@ -2164,6 +2257,8 @@ module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
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module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
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module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
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module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
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module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
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S_IRUGO | S_IWUSR);
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MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
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MODULE_DESCRIPTION("SCSI debug adapter driver");
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@ -2175,6 +2270,7 @@ MODULE_PARM_DESC(delay, "# of jiffies to delay response(def=1)");
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MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs(def=8)");
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MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
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MODULE_PARM_DESC(every_nth, "timeout every nth command(def=100)");
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MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
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MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
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MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
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MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
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@ -2183,6 +2279,7 @@ MODULE_PARM_DESC(opts, "1->noise, 2->medium_error, 4->... (def=0)");
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MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
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MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])");
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MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)");
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MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
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static char sdebug_info[256];
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@ -2334,6 +2431,24 @@ static ssize_t sdebug_dsense_store(struct device_driver * ddp,
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DRIVER_ATTR(dsense, S_IRUGO | S_IWUSR, sdebug_dsense_show,
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sdebug_dsense_store);
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static ssize_t sdebug_fake_rw_show(struct device_driver * ddp, char * buf)
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{
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return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
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}
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static ssize_t sdebug_fake_rw_store(struct device_driver * ddp,
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const char * buf, size_t count)
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{
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int n;
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if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
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scsi_debug_fake_rw = n;
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return count;
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}
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return -EINVAL;
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}
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DRIVER_ATTR(fake_rw, S_IRUGO | S_IWUSR, sdebug_fake_rw_show,
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sdebug_fake_rw_store);
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static ssize_t sdebug_no_lun_0_show(struct device_driver * ddp, char * buf)
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{
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return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0);
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@ -2487,6 +2602,31 @@ static ssize_t sdebug_add_host_store(struct device_driver * ddp,
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DRIVER_ATTR(add_host, S_IRUGO | S_IWUSR, sdebug_add_host_show,
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sdebug_add_host_store);
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static ssize_t sdebug_vpd_use_hostno_show(struct device_driver * ddp,
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char * buf)
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{
|
||||
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);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user