* (or disk like devices) sharing a common amount of RAM
*
*
- * For documentation see http://www.torque.net/sg/sdebug25.html
+ * For documentation see http://www.torque.net/sg/sdebug26.html
*
* D. Gilbert (dpg) work for Magneto-Optical device test [20010421]
* dpg: work for devfs large number of disks [20010809]
#include "scsi_logging.h"
#include "scsi_debug.h"
-#define SCSI_DEBUG_VERSION "1.73"
-static const char * scsi_debug_version_date = "20040518";
+#define SCSI_DEBUG_VERSION "1.75"
+static const char * scsi_debug_version_date = "20050113";
/* Additional Sense Code (ASC) used */
#define NO_ADDED_SENSE 0x0
#define DEF_EVERY_NTH 0
#define DEF_NUM_PARTS 0
#define DEF_OPTS 0
-#define DEF_SCSI_LEVEL 3
+#define DEF_SCSI_LEVEL 5 /* INQUIRY, byte2 [5->SPC-3] */
#define DEF_PTYPE 0
+#define DEF_D_SENSE 0
/* bit mask values for scsi_debug_opts */
#define SCSI_DEBUG_OPT_NOISE 1
* - 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.
+ *
+ * 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.
+ * This will continue until some other action occurs (e.g. the user
+ * writing a new value (other than -1 or 1) to every_nth via sysfs).
*/
/* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
static int scsi_debug_opts = DEF_OPTS;
static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
+static int scsi_debug_dsense = DEF_D_SENSE;
static int scsi_debug_cmnd_count = 0;
container_of(d, struct sdebug_host_info, dev)
static LIST_HEAD(sdebug_host_list);
-static spinlock_t sdebug_host_list_lock = SPIN_LOCK_UNLOCKED;
+static DEFINE_SPINLOCK(sdebug_host_list_lock);
typedef void (* done_funct_t) (struct scsi_cmnd *);
.cmd_per_lun = 3,
.max_sectors = 4096,
.unchecked_isa_dma = 0,
- .use_clustering = ENABLE_CLUSTERING,
+ .use_clustering = DISABLE_CLUSTERING,
.module = THIS_MODULE,
};
static unsigned char * fake_storep; /* ramdisk storage */
-static unsigned char spare_buff[SDEBUG_SENSE_LEN];
-
static int num_aborts = 0;
static int num_dev_resets = 0;
static int num_bus_resets = 0;
static int num_host_resets = 0;
-static spinlock_t queued_arr_lock = SPIN_LOCK_UNLOCKED;
-static rwlock_t atomic_rw = RW_LOCK_UNLOCKED;
+static DEFINE_SPINLOCK(queued_arr_lock);
+static DEFINE_RWLOCK(atomic_rw);
static char sdebug_proc_name[] = "scsi_debug";
(DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
/* function declarations */
-static int resp_inquiry(unsigned char * cmd, int target, unsigned char * buff,
- int bufflen, struct sdebug_dev_info * devip);
-static int resp_mode_sense(unsigned char * cmd, int target,
- unsigned char * buff, int bufflen,
+static int resp_inquiry(struct scsi_cmnd * SCpnt, int target,
+ struct sdebug_dev_info * devip);
+static int resp_requests(struct scsi_cmnd * SCpnt,
+ struct sdebug_dev_info * devip);
+static int resp_readcap(struct scsi_cmnd * SCpnt,
+ struct sdebug_dev_info * devip);
+static int resp_mode_sense(struct scsi_cmnd * SCpnt, int target,
struct sdebug_dev_info * devip);
static int resp_read(struct scsi_cmnd * SCpnt, int upper_blk, int block,
int num, struct sdebug_dev_info * devip);
static int resp_write(struct scsi_cmnd * SCpnt, int upper_blk, int block,
int num, struct sdebug_dev_info * devip);
-static int resp_report_luns(unsigned char * cmd, unsigned char * buff,
- int bufflen, struct sdebug_dev_info * devip);
+static int resp_report_luns(struct scsi_cmnd * SCpnt,
+ struct sdebug_dev_info * devip);
+static int fill_from_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr,
+ int arr_len);
+static int fetch_to_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr,
+ int max_arr_len);
static void timer_intr_handler(unsigned long);
static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev);
static void mk_sense_buffer(struct sdebug_dev_info * devip, int key,
- int asc, int asq, int inbandLen);
+ int asc, int asq);
static int check_reset(struct scsi_cmnd * SCpnt,
struct sdebug_dev_info * devip);
static int schedule_resp(struct scsi_cmnd * cmnd,
static struct device pseudo_primary;
static struct bus_type pseudo_lld_bus;
-static unsigned char * scatg2virt(const struct scatterlist * sclp)
-{
- if (NULL == sclp)
- return NULL;
- else if (sclp->page)
- return (unsigned char *)page_address(sclp->page) +
- sclp->offset;
- else
- return NULL;
-}
static
int scsi_debug_queuecommand(struct scsi_cmnd * SCpnt, done_funct_t done)
{
unsigned char *cmd = (unsigned char *) SCpnt->cmnd;
- int block, upper_blk, num;
- unsigned char *buff;
+ int block, upper_blk, num, k;
int errsts = 0;
int target = SCpnt->device->id;
- int bufflen = SCpnt->request_bufflen;
- unsigned long capac;
struct sdebug_dev_info * devip = NULL;
- unsigned char * sbuff;
int inj_recovered = 0;
if (done == NULL)
return 0; /* assume mid level reprocessing command */
- if (SCpnt->use_sg) { /* just use first element */
- struct scatterlist *sgpnt = (struct scatterlist *)
- SCpnt->request_buffer;
-
- buff = scatg2virt(&sgpnt[0]);
- bufflen = sgpnt[0].length;
- /* READ and WRITE process scatterlist themselves */
- }
- else
- buff = (unsigned char *) SCpnt->request_buffer;
- if (NULL == buff) {
- buff = spare_buff; /* assume cmd moves no data */
- bufflen = SDEBUG_SENSE_LEN;
+ if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmd) {
+ printk(KERN_INFO "scsi_debug: cmd ");
+ for (k = 0, num = SCpnt->cmd_len; k < num; ++k)
+ printk("%02x ", (int)cmd[k]);
+ printk("\n");
}
-
-
if(target == sdebug_driver_template.this_id) {
printk(KERN_INFO "scsi_debug: initiator's id used as "
"target!\n");
return schedule_resp(SCpnt, NULL, done,
DID_NO_CONNECT << 16, 0);
- if ((scsi_debug_every_nth > 0) &&
- (++scsi_debug_cmnd_count >= scsi_debug_every_nth)) {
- scsi_debug_cmnd_count =0;
+ if ((scsi_debug_every_nth != 0) &&
+ (++scsi_debug_cmnd_count >= abs(scsi_debug_every_nth))) {
+ scsi_debug_cmnd_count = 0;
+ if (scsi_debug_every_nth < -1)
+ scsi_debug_every_nth = -1;
if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
return 0; /* ignore command causing timeout */
else if (SCSI_DEBUG_OPT_RECOVERED_ERR & scsi_debug_opts)
}
switch (*cmd) {
- case INQUIRY: /* mandatory */
- errsts = resp_inquiry(cmd, target, buff, bufflen, devip);
+ case INQUIRY: /* mandatory, ignore unit attention */
+ errsts = resp_inquiry(SCpnt, target, devip);
break;
- case REQUEST_SENSE: /* mandatory */
- /* Since this driver indicates autosense by placing the
- * sense buffer in the scsi_cmnd structure in the response
- * (when SAM_STAT_CHECK_CONDITION is set), the mid level
- * shouldn't need to call REQUEST_SENSE */
- if (devip) {
- sbuff = devip->sense_buff;
- memcpy(buff, sbuff, (bufflen < SDEBUG_SENSE_LEN) ?
- bufflen : SDEBUG_SENSE_LEN);
- mk_sense_buffer(devip, 0, NO_ADDED_SENSE, 0, 7);
- } else {
- memset(buff, 0, bufflen);
- buff[0] = 0x70;
- }
+ case REQUEST_SENSE: /* mandatory, ignore unit attention */
+ errsts = resp_requests(SCpnt, devip);
break;
+ case REZERO_UNIT: /* actually this is REWIND for SSC */
case START_STOP:
errsts = check_reset(SCpnt, devip);
break;
if ((errsts = check_reset(SCpnt, devip)))
break;
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
- printk("\tMedium removal %s\n",
- cmd[4] ? "inhibited" : "enabled");
+ printk(KERN_INFO "scsi_debug: Medium removal %s\n",
+ cmd[4] ? "inhibited" : "enabled");
break;
case SEND_DIAGNOSTIC: /* mandatory */
- memset(buff, 0, bufflen);
+ errsts = check_reset(SCpnt, devip);
break;
case TEST_UNIT_READY: /* mandatory */
- memset(buff, 0, bufflen);
+ errsts = check_reset(SCpnt, devip);
break;
case RESERVE:
errsts = check_reset(SCpnt, devip);
- memset(buff, 0, bufflen);
break;
case RESERVE_10:
errsts = check_reset(SCpnt, devip);
- memset(buff, 0, bufflen);
break;
case RELEASE:
errsts = check_reset(SCpnt, devip);
- memset(buff, 0, bufflen);
break;
case RELEASE_10:
errsts = check_reset(SCpnt, devip);
- memset(buff, 0, bufflen);
break;
case READ_CAPACITY:
- errsts = check_reset(SCpnt, devip);
- memset(buff, 0, bufflen);
- if (bufflen > 7) {
- capac = (unsigned long)sdebug_capacity - 1;
- buff[0] = (capac >> 24);
- buff[1] = (capac >> 16) & 0xff;
- buff[2] = (capac >> 8) & 0xff;
- buff[3] = capac & 0xff;
- buff[6] = (SECT_SIZE_PER(target) >> 8) & 0xff;
- buff[7] = SECT_SIZE_PER(target) & 0xff;
- }
+ errsts = resp_readcap(SCpnt, devip);
break;
case READ_16:
case READ_12:
errsts = resp_read(SCpnt, upper_blk, block, num, devip);
if (inj_recovered && (0 == errsts)) {
mk_sense_buffer(devip, RECOVERED_ERROR,
- THRESHHOLD_EXCEEDED, 0, 18);
+ THRESHHOLD_EXCEEDED, 0);
errsts = check_condition_result;
}
break;
- case REPORT_LUNS:
- errsts = resp_report_luns(cmd, buff, bufflen, devip);
+ case REPORT_LUNS: /* mandatory, ignore unit attention */
+ errsts = resp_report_luns(SCpnt, devip);
+ break;
+ case VERIFY: /* 10 byte SBC-2 command */
+ errsts = check_reset(SCpnt, devip);
break;
case WRITE_16:
case WRITE_12:
errsts = resp_write(SCpnt, upper_blk, block, num, devip);
if (inj_recovered && (0 == errsts)) {
mk_sense_buffer(devip, RECOVERED_ERROR,
- THRESHHOLD_EXCEEDED, 0, 18);
+ THRESHHOLD_EXCEEDED, 0);
errsts = check_condition_result;
}
break;
case MODE_SENSE:
case MODE_SENSE_10:
- errsts = resp_mode_sense(cmd, target, buff, bufflen, devip);
+ errsts = resp_mode_sense(SCpnt, target, devip);
break;
case SYNCHRONIZE_CACHE:
- memset(buff, 0, bufflen);
+ errsts = check_reset(SCpnt, devip);
break;
default:
+ if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
+ printk(KERN_INFO "scsi_debug: Opcode: 0x%x not "
+ "supported\n", *cmd);
if ((errsts = check_reset(SCpnt, devip)))
- break;
- mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0, 18);
+ break; /* Unit attention takes precedence */
+ mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
errsts = check_condition_result;
break;
}
static int check_reset(struct scsi_cmnd * SCpnt, struct sdebug_dev_info * devip)
{
if (devip->reset) {
+ if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
+ printk(KERN_INFO "scsi_debug: Reporting Unit "
+ "attention: power on reset\n");
devip->reset = 0;
- mk_sense_buffer(devip, UNIT_ATTENTION, POWERON_RESET, 0, 18);
+ mk_sense_buffer(devip, UNIT_ATTENTION, POWERON_RESET, 0);
return check_condition_result;
}
return 0;
}
-#define SDEBUG_LONG_INQ_SZ 58
-#define SDEBUG_MAX_INQ_ARR_SZ 128
+/* 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 k, req_len, act_len, len, active;
+ void * kaddr;
+ void * kaddr_off;
+ struct scatterlist * sgpnt;
+
+ if (0 == scp->request_bufflen)
+ return 0;
+ if (NULL == scp->request_buffer)
+ return (DID_ERROR << 16);
+ if (! ((scp->sc_data_direction == DMA_BIDIRECTIONAL) ||
+ (scp->sc_data_direction == DMA_FROM_DEVICE)))
+ return (DID_ERROR << 16);
+ if (0 == scp->use_sg) {
+ req_len = scp->request_bufflen;
+ act_len = (req_len < arr_len) ? req_len : arr_len;
+ memcpy(scp->request_buffer, arr, act_len);
+ scp->resid = req_len - act_len;
+ return 0;
+ }
+ sgpnt = (struct scatterlist *)scp->request_buffer;
+ active = 1;
+ for (k = 0, req_len = 0, act_len = 0; k < scp->use_sg; ++k, ++sgpnt) {
+ if (active) {
+ kaddr = (unsigned char *)
+ kmap_atomic(sgpnt->page, KM_USER0);
+ if (NULL == kaddr)
+ return (DID_ERROR << 16);
+ kaddr_off = (unsigned char *)kaddr + sgpnt->offset;
+ len = sgpnt->length;
+ if ((req_len + len) > arr_len) {
+ active = 0;
+ len = arr_len - req_len;
+ }
+ memcpy(kaddr_off, arr + req_len, len);
+ kunmap_atomic(kaddr, KM_USER0);
+ act_len += len;
+ }
+ req_len += sgpnt->length;
+ }
+ scp->resid = req_len - 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 max_arr_len)
+{
+ int k, req_len, len, fin;
+ void * kaddr;
+ void * kaddr_off;
+ struct scatterlist * sgpnt;
+
+ if (0 == scp->request_bufflen)
+ return 0;
+ if (NULL == scp->request_buffer)
+ return -1;
+ if (! ((scp->sc_data_direction == DMA_BIDIRECTIONAL) ||
+ (scp->sc_data_direction == DMA_TO_DEVICE)))
+ return -1;
+ if (0 == scp->use_sg) {
+ req_len = scp->request_bufflen;
+ len = (req_len < max_arr_len) ? req_len : max_arr_len;
+ memcpy(arr, scp->request_buffer, len);
+ return len;
+ }
+ sgpnt = (struct scatterlist *)scp->request_buffer;
+ for (k = 0, req_len = 0, fin = 0; k < scp->use_sg; ++k, ++sgpnt) {
+ kaddr = (unsigned char *)kmap_atomic(sgpnt->page, KM_USER0);
+ if (NULL == kaddr)
+ return -1;
+ kaddr_off = (unsigned char *)kaddr + sgpnt->offset;
+ len = sgpnt->length;
+ if ((req_len + len) > max_arr_len) {
+ len = max_arr_len - req_len;
+ fin = 1;
+ }
+ memcpy(arr + req_len, kaddr_off, len);
+ kunmap_atomic(kaddr, KM_USER0);
+ if (fin)
+ return req_len + len;
+ req_len += sgpnt->length;
+ }
+ return req_len;
+}
-static const char * vendor_id = "Linux ";
-static const char * product_id = "scsi_debug ";
-static const char * product_rev = "0004";
+
+static const char * inq_vendor_id = "Linux ";
+static const char * inq_product_id = "scsi_debug ";
+static const char * inq_product_rev = "0004";
static int inquiry_evpd_83(unsigned char * arr, int dev_id_num,
const char * dev_id_str, int dev_id_str_len)
arr[0] = 0x2; /* ASCII */
arr[1] = 0x1;
arr[2] = 0x0;
- memcpy(&arr[4], vendor_id, 8);
- memcpy(&arr[12], product_id, 16);
+ 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;
return num + 12;
}
-static int resp_inquiry(unsigned char * cmd, int target, unsigned char * buff,
- int bufflen, struct sdebug_dev_info * devip)
+
+#define SDEBUG_LONG_INQ_SZ 96
+#define SDEBUG_MAX_INQ_ARR_SZ 128
+
+static int resp_inquiry(struct scsi_cmnd * scp, int target,
+ struct sdebug_dev_info * devip)
{
unsigned char pq_pdt;
unsigned char arr[SDEBUG_MAX_INQ_ARR_SZ];
- int min_len = bufflen > SDEBUG_MAX_INQ_ARR_SZ ?
- SDEBUG_MAX_INQ_ARR_SZ : bufflen;
+ unsigned char *cmd = (unsigned char *)scp->cmnd;
+ int alloc_len;
- if (bufflen < cmd[4])
- printk(KERN_INFO "scsi_debug: inquiry: bufflen=%d "
- "< alloc_length=%d\n", bufflen, (int)cmd[4]);
- memset(buff, 0, bufflen);
+ alloc_len = (cmd[3] << 8) + cmd[4];
memset(arr, 0, SDEBUG_MAX_INQ_ARR_SZ);
pq_pdt = (scsi_debug_ptype & 0x1f);
arr[0] = pq_pdt;
if (0x2 & cmd[1]) { /* CMDDT bit set */
mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
- 0, 18);
+ 0);
return check_condition_result;
} else if (0x1 & cmd[1]) { /* EVPD bit set */
int dev_id_num, len;
} else {
/* Illegal request, invalid field in cdb */
mk_sense_buffer(devip, ILLEGAL_REQUEST,
- INVALID_FIELD_IN_CDB, 0, 18);
+ INVALID_FIELD_IN_CDB, 0);
return check_condition_result;
}
- memcpy(buff, arr, min_len);
- return 0;
+ return fill_from_dev_buffer(scp, arr,
+ min(alloc_len, SDEBUG_MAX_INQ_ARR_SZ));
}
/* drops through here for a standard inquiry */
arr[1] = DEV_REMOVEABLE(target) ? 0x80 : 0; /* Removable disk */
arr[2] = scsi_debug_scsi_level;
+ arr[3] = 2; /* response_data_format==2 */
arr[4] = SDEBUG_LONG_INQ_SZ - 5;
+ arr[6] = 0x1; /* claim: ADDR16 */
+ /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
arr[7] = 0x3a; /* claim: WBUS16, SYNC, LINKED + CMDQUE */
- memcpy(&arr[8], vendor_id, 8);
- memcpy(&arr[16], product_id, 16);
- memcpy(&arr[32], product_rev, 4);
- memcpy(buff, arr, min_len);
- return 0;
+ 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] = 0x40; /* SAM-2 */
+ arr[60] = 0x3; arr[61] = 0x0; /* SPC-3 */
+ if (scsi_debug_ptype == 0) {
+ arr[62] = 0x1; arr[63] = 0x80; /* SBC */
+ } else if (scsi_debug_ptype == 1) {
+ arr[62] = 0x2; arr[63] = 0x00; /* SSC */
+ }
+ return fill_from_dev_buffer(scp, arr,
+ min(alloc_len, SDEBUG_LONG_INQ_SZ));
+}
+
+static int resp_requests(struct scsi_cmnd * scp,
+ struct sdebug_dev_info * devip)
+{
+ unsigned char * sbuff;
+ unsigned char *cmd = (unsigned char *)scp->cmnd;
+ unsigned char arr[SDEBUG_SENSE_LEN];
+ int len = 18;
+
+ memset(arr, 0, SDEBUG_SENSE_LEN);
+ if (devip->reset == 1)
+ mk_sense_buffer(devip, 0, NO_ADDED_SENSE, 0);
+ sbuff = devip->sense_buff;
+ if ((cmd[1] & 1) && (! scsi_debug_dsense)) {
+ /* DESC bit set and sense_buff in fixed format */
+ arr[0] = 0x72;
+ arr[1] = sbuff[2]; /* sense key */
+ arr[2] = sbuff[12]; /* asc */
+ arr[3] = sbuff[13]; /* ascq */
+ len = 8;
+ } else
+ memcpy(arr, sbuff, SDEBUG_SENSE_LEN);
+ mk_sense_buffer(devip, 0, NO_ADDED_SENSE, 0);
+ return fill_from_dev_buffer(scp, arr, len);
+}
+
+#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 long capac;
+ int errsts;
+
+ if ((errsts = check_reset(scp, devip)))
+ return errsts;
+ memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
+ capac = (unsigned long)sdebug_capacity - 1;
+ arr[0] = (capac >> 24);
+ arr[1] = (capac >> 16) & 0xff;
+ arr[2] = (capac >> 8) & 0xff;
+ arr[3] = capac & 0xff;
+ arr[6] = (SECT_SIZE_PER(target) >> 8) & 0xff;
+ arr[7] = SECT_SIZE_PER(target) & 0xff;
+ return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
}
/* <<Following mode page info copied from ST318451LW>> */
unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
0, 0, 0x2, 0x4b};
+ if (scsi_debug_dsense)
+ ctrl_m_pg[2] |= 0x4;
memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
if (1 == pcontrol)
memset(p + 2, 0, sizeof(ctrl_m_pg) - 2);
#define SDEBUG_MAX_MSENSE_SZ 256
-static int resp_mode_sense(unsigned char * cmd, int target,
- unsigned char * buff, int bufflen,
+static int resp_mode_sense(struct scsi_cmnd * scp, int target,
struct sdebug_dev_info * devip)
{
unsigned char dbd;
- int pcontrol, pcode;
+ int pcontrol, pcode, subpcode;
unsigned char dev_spec;
- int alloc_len, msense_6, offset, len;
+ int alloc_len, msense_6, offset, len, errsts;
unsigned char * ap;
unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
- int min_len = bufflen > SDEBUG_MAX_MSENSE_SZ ?
- SDEBUG_MAX_MSENSE_SZ : bufflen;
+ unsigned char *cmd = (unsigned char *)scp->cmnd;
- SCSI_LOG_LLQUEUE(3, printk("Mode sense ...(%p %d)\n", buff, bufflen));
+ if ((errsts = check_reset(scp, devip)))
+ return errsts;
dbd = cmd[1] & 0x8;
pcontrol = (cmd[2] & 0xc0) >> 6;
pcode = cmd[2] & 0x3f;
+ subpcode = cmd[3];
msense_6 = (MODE_SENSE == cmd[0]);
alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
- /* printk(KERN_INFO "msense: dbd=%d pcontrol=%d pcode=%d "
- "msense_6=%d alloc_len=%d\n", dbd, pcontrol, pcode, "
- "msense_6, alloc_len); */
- if (bufflen < alloc_len)
- printk(KERN_INFO "scsi_debug: mode_sense: bufflen=%d "
- "< alloc_length=%d\n", bufflen, alloc_len);
- memset(buff, 0, bufflen);
memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
if (0x3 == pcontrol) { /* Saving values not supported */
mk_sense_buffer(devip, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP,
- 0, 18);
+ 0);
return check_condition_result;
}
dev_spec = DEV_READONLY(target) ? 0x80 : 0x0;
}
ap = arr + offset;
+ if (0 != subpcode) { /* TODO: Control Extension page */
+ mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
+ 0);
+ return check_condition_result;
+ }
switch (pcode) {
case 0x1: /* Read-Write error recovery page, direct access */
len = resp_err_recov_pg(ap, pcontrol, target);
break;
default:
mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
- 0, 18);
+ 0);
return check_condition_result;
}
if (msense_6)
arr[0] = offset - 1;
else {
- offset -= 2;
- arr[0] = (offset >> 8) & 0xff;
- arr[1] = offset & 0xff;
+ arr[0] = ((offset - 2) >> 8) & 0xff;
+ arr[1] = (offset - 2) & 0xff;
}
- memcpy(buff, arr, min_len);
- return 0;
+ return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
}
static int resp_read(struct scsi_cmnd * SCpnt, int upper_blk, int block,
int num, struct sdebug_dev_info * devip)
{
- unsigned char *buff = (unsigned char *) SCpnt->request_buffer;
- int nbytes, sgcount;
- struct scatterlist *sgpnt = NULL;
- int bufflen = SCpnt->request_bufflen;
unsigned long iflags;
+ int ret;
if (upper_blk || (block + num > sdebug_capacity)) {
mk_sense_buffer(devip, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE,
- 0, 18);
+ 0);
return check_condition_result;
}
if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
(block <= OPT_MEDIUM_ERR_ADDR) &&
((block + num) > OPT_MEDIUM_ERR_ADDR)) {
mk_sense_buffer(devip, MEDIUM_ERROR, UNRECOVERED_READ_ERR,
- 0, 18);
+ 0);
/* claim unrecoverable read error */
return check_condition_result;
}
read_lock_irqsave(&atomic_rw, iflags);
- sgcount = 0;
- nbytes = bufflen;
- /* printk(KERN_INFO "scsi_debug_read: block=%d, tot_bufflen=%d\n",
- block, bufflen); */
- if (SCpnt->use_sg) {
- sgcount = 0;
- sgpnt = (struct scatterlist *) buff;
- buff = scatg2virt(&sgpnt[sgcount]);
- bufflen = sgpnt[sgcount].length;
- }
- do {
- memcpy(buff, fake_storep + (block * SECT_SIZE), bufflen);
- nbytes -= bufflen;
- if (SCpnt->use_sg) {
- block += bufflen >> POW2_SECT_SIZE;
- sgcount++;
- if (nbytes) {
- buff = scatg2virt(&sgpnt[sgcount]);
- bufflen = sgpnt[sgcount].length;
- }
- } else if (nbytes > 0)
- printk(KERN_WARNING "scsi_debug:resp_read: unexpected "
- "nbytes=%d\n", nbytes);
- } while (nbytes);
+ ret = fill_from_dev_buffer(SCpnt, fake_storep + (block * SECT_SIZE),
+ num * SECT_SIZE);
read_unlock_irqrestore(&atomic_rw, iflags);
- return 0;
+ return ret;
}
static int resp_write(struct scsi_cmnd * SCpnt, int upper_blk, int block,
int num, struct sdebug_dev_info * devip)
{
- unsigned char *buff = (unsigned char *) SCpnt->request_buffer;
- int nbytes, sgcount;
- struct scatterlist *sgpnt = NULL;
- int bufflen = SCpnt->request_bufflen;
unsigned long iflags;
+ int res;
if (upper_blk || (block + num > sdebug_capacity)) {
mk_sense_buffer(devip, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE,
- 0, 18);
+ 0);
return check_condition_result;
}
write_lock_irqsave(&atomic_rw, iflags);
- sgcount = 0;
- nbytes = bufflen;
- if (SCpnt->use_sg) {
- sgcount = 0;
- sgpnt = (struct scatterlist *) buff;
- buff = scatg2virt(&sgpnt[sgcount]);
- bufflen = sgpnt[sgcount].length;
- }
- do {
- memcpy(fake_storep + (block * SECT_SIZE), buff, bufflen);
-
- nbytes -= bufflen;
- if (SCpnt->use_sg) {
- block += bufflen >> POW2_SECT_SIZE;
- sgcount++;
- if (nbytes) {
- buff = scatg2virt(&sgpnt[sgcount]);
- bufflen = sgpnt[sgcount].length;
- }
- } else if (nbytes > 0)
- printk(KERN_WARNING "scsi_debug:resp_write: "
- "unexpected nbytes=%d\n", nbytes);
- } while (nbytes);
+ res = fetch_to_dev_buffer(SCpnt, fake_storep + (block * SECT_SIZE),
+ num * SECT_SIZE);
write_unlock_irqrestore(&atomic_rw, iflags);
+ if (-1 == res)
+ return (DID_ERROR << 16);
+ else if ((res < (num * SECT_SIZE)) &&
+ (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
+ printk(KERN_INFO "scsi_debug: write: cdb indicated=%d, "
+ " IO sent=%d bytes\n", num * SECT_SIZE, res);
return 0;
}
-static int resp_report_luns(unsigned char * cmd, unsigned char * buff,
- int bufflen, struct sdebug_dev_info * devip)
+#define SDEBUG_RLUN_ARR_SZ 128
+
+static int resp_report_luns(struct scsi_cmnd * scp,
+ struct sdebug_dev_info * devip)
{
unsigned int alloc_len;
int lun_cnt, i, upper;
+ unsigned char *cmd = (unsigned char *)scp->cmnd;
int select_report = (int)cmd[2];
struct scsi_lun *one_lun;
+ unsigned char arr[SDEBUG_RLUN_ARR_SZ];
alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
if ((alloc_len < 16) || (select_report > 2)) {
mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
- 0, 18);
+ 0);
return check_condition_result;
}
- if (bufflen > 8) { /* can produce response with up to 16k luns
- (lun 0 to lun 16383) */
- memset(buff, 0, bufflen);
- lun_cnt = scsi_debug_max_luns;
- buff[2] = ((sizeof(struct scsi_lun) * lun_cnt) >> 8) & 0xff;
- buff[3] = (sizeof(struct scsi_lun) * lun_cnt) & 0xff;
- lun_cnt = min((int)((bufflen - 8) / sizeof(struct scsi_lun)),
- lun_cnt);
- one_lun = (struct scsi_lun *) &buff[8];
- for (i = 0; i < lun_cnt; i++) {
- upper = (i >> 8) & 0x3f;
- if (upper)
- one_lun[i].scsi_lun[0] =
- (upper | (SAM2_LUN_ADDRESS_METHOD << 6));
- one_lun[i].scsi_lun[1] = i & 0xff;
- }
+ /* can produce response with up to 16k luns (lun 0 to lun 16383) */
+ memset(arr, 0, SDEBUG_RLUN_ARR_SZ);
+ lun_cnt = scsi_debug_max_luns;
+ arr[2] = ((sizeof(struct scsi_lun) * lun_cnt) >> 8) & 0xff;
+ arr[3] = (sizeof(struct scsi_lun) * lun_cnt) & 0xff;
+ lun_cnt = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
+ sizeof(struct scsi_lun)), lun_cnt);
+ one_lun = (struct scsi_lun *) &arr[8];
+ for (i = 0; i < lun_cnt; i++) {
+ upper = (i >> 8) & 0x3f;
+ if (upper)
+ one_lun[i].scsi_lun[0] =
+ (upper | (SAM2_LUN_ADDRESS_METHOD << 6));
+ one_lun[i].scsi_lun[1] = i & 0xff;
}
- return 0;
+ return fill_from_dev_buffer(scp, arr,
+ min((int)alloc_len, SDEBUG_RLUN_ARR_SZ));
}
/* When timer goes off this function is called. */
open_devip->reset = 1;
open_devip->used = 1;
memset(open_devip->sense_buff, 0, SDEBUG_SENSE_LEN);
- open_devip->sense_buff[0] = 0x70;
+ if (scsi_debug_dsense)
+ open_devip->sense_buff[0] = 0x72;
+ else {
+ open_devip->sense_buff[0] = 0x70;
+ open_devip->sense_buff[7] = 0xa;
+ }
return open_devip;
}
return NULL;
}
static void mk_sense_buffer(struct sdebug_dev_info * devip, int key,
- int asc, int asq, int inbandLen)
+ int asc, int asq)
{
unsigned char * sbuff;
sbuff = devip->sense_buff;
memset(sbuff, 0, SDEBUG_SENSE_LEN);
- if (inbandLen > SDEBUG_SENSE_LEN)
- inbandLen = SDEBUG_SENSE_LEN;
- sbuff[0] = 0x70;
- sbuff[2] = key;
- sbuff[7] = (inbandLen > 7) ? (inbandLen - 8) : 0;
- sbuff[12] = asc;
- sbuff[13] = asq;
+ if (scsi_debug_dsense) {
+ sbuff[0] = 0x72; /* descriptor, current */
+ sbuff[1] = key;
+ sbuff[2] = asc;
+ sbuff[3] = asq;
+ } else {
+ sbuff[0] = 0x70; /* fixed, current */
+ sbuff[2] = key;
+ sbuff[7] = 0xa; /* implies 18 byte sense buffer */
+ sbuff[12] = asc;
+ sbuff[13] = asq;
+ }
+ if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
+ printk(KERN_INFO "scsi_debug: [sense_key,asc,ascq]: "
+ "[0x%x,0x%x,0x%x]\n", key, asc, asq);
}
static int scsi_debug_abort(struct scsi_cmnd * SCpnt)
struct sdebug_dev_info * devip,
done_funct_t done, int scsi_result, int delta_jiff)
{
- int k, num;
-
if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmnd) {
- printk(KERN_INFO "scsi_debug: cmd ");
- for (k = 0, num = cmnd->cmd_len; k < num; ++k)
- printk("%02x ", (int)cmnd->cmnd[k]);
- printk("\n");
if (scsi_result) {
struct scsi_device * sdp = cmnd->device;
- printk(KERN_INFO "scsi_debug: ... <%u %u %u %u> "
+ printk(KERN_INFO "scsi_debug: <%u %u %u %u> "
"non-zero result=0x%x\n", sdp->host->host_no,
sdp->channel, sdp->id, sdp->lun, scsi_result);
}
module_param_named(add_host, scsi_debug_add_host, int, 0); /* perm=0644 */
module_param_named(delay, scsi_debug_delay, int, 0); /* perm=0644 */
module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, 0);
+module_param_named(dsense, scsi_debug_dsense, int, 0);
module_param_named(every_nth, scsi_debug_every_nth, int, 0);
module_param_named(max_luns, scsi_debug_max_luns, int, 0);
module_param_named(num_parts, scsi_debug_num_parts, int, 0);
MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
MODULE_PARM_DESC(delay, "# of jiffies to delay response(def=1)");
MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs");
+MODULE_PARM_DESC(dsense, "use descriptor sense format(def: fixed)");
MODULE_PARM_DESC(every_nth, "timeout every nth command(def=100)");
MODULE_PARM_DESC(max_luns, "number of SCSI LUNs per target to simulate");
MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
MODULE_PARM_DESC(num_tgts, "number of SCSI targets per host to simulate");
MODULE_PARM_DESC(opts, "1->noise, 2->medium_error, 4->...");
MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
-MODULE_PARM_DESC(scsi_level, "SCSI level to simulate");
+MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])");
static char sdebug_info[256];
if (1 != sscanf(arr, "%d", &pos))
return -EINVAL;
scsi_debug_opts = pos;
- if (scsi_debug_every_nth > 0)
+ if (scsi_debug_every_nth != 0)
scsi_debug_cmnd_count = 0;
return length;
}
}
DRIVER_ATTR(ptype, S_IRUGO | S_IWUSR, sdebug_ptype_show, sdebug_ptype_store);
+static ssize_t sdebug_dsense_show(struct device_driver * ddp, char * buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
+}
+static ssize_t sdebug_dsense_store(struct device_driver * ddp,
+ const char * buf, size_t count)
+{
+ int n;
+
+ if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
+ scsi_debug_dsense = n;
+ return count;
+ }
+ return -EINVAL;
+}
+DRIVER_ATTR(dsense, S_IRUGO | S_IWUSR, sdebug_dsense_show,
+ sdebug_dsense_store);
+
static ssize_t sdebug_num_tgts_show(struct device_driver * ddp, char * buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
{
int nth;
- if ((count > 0) && (1 == sscanf(buf, "%d", &nth)) && (nth >= 0)) {
+ if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
scsi_debug_every_nth = nth;
scsi_debug_cmnd_count = 0;
return count;
driver_create_file(&sdebug_driverfs_driver, &driver_attr_add_host);
driver_create_file(&sdebug_driverfs_driver, &driver_attr_delay);
driver_create_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
+ driver_create_file(&sdebug_driverfs_driver, &driver_attr_dsense);
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_num_tgts);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_tgts);
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_dsense);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_delay);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_add_host);
git://git.onelab.eu / linux-2.6.git / blobdiff