/* * 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://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] * 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/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/blkdev.h> #include "scsi.h" #include <scsi/scsi_host.h> #include <scsi/scsicam.h> #include <linux/stat.h> #include "scsi_logging.h" #include "scsi_debug.h" #define SCSI_DEBUG_VERSION "1.81" static const char * scsi_debug_version_date = "20070104"; /* Additional Sense Code (ASC) */ #define NO_ADDITIONAL_SENSE 0x0 #define LOGICAL_UNIT_NOT_READY 0x4 #define UNRECOVERED_READ_ERR 0x11 #define PARAMETER_LIST_LENGTH_ERR 0x1a #define INVALID_OPCODE 0x20 #define ADDR_OUT_OF_RANGE 0x21 #define INVALID_FIELD_IN_CDB 0x24 #define INVALID_FIELD_IN_PARAM_LIST 0x26 #define POWERON_RESET 0x29 #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 #define SDEBUG_TAGGED_QUEUING 0 /* 0 | MSG_SIMPLE_TAG | MSG_ORDERED_TAG */ /* 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_DELAY 1 #define DEF_DEV_SIZE_MB 8 #define DEF_EVERY_NTH 0 #define DEF_NUM_PARTS 0 #define DEF_OPTS 0 #define DEF_SCSI_LEVEL 5 /* INQUIRY, byte2 [5->SPC-3] */ #define DEF_PTYPE 0 #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 #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 /* 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). */ /* 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 */ /* 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 static int scsi_debug_add_host = DEF_NUM_HOST; static int scsi_debug_delay = DEF_DELAY; static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB; static int scsi_debug_every_nth = DEF_EVERY_NTH; static int scsi_debug_max_luns = DEF_MAX_LUNS; 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_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_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; #define DEV_READONLY(TGT) (0) #define DEV_REMOVEABLE(TGT) (0) static unsigned int sdebug_store_size; /* in bytes */ 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 */ /* default sector size is 512 bytes, 2**9 bytes */ #define POW2_SECT_SIZE 9 #define SECT_SIZE (1 << POW2_SECT_SIZE) #define SECT_SIZE_PER(TGT) SECT_SIZE #define SDEBUG_MAX_PARTS 4 #define SDEBUG_SENSE_LEN 32 struct sdebug_dev_info { struct list_head dev_list; unsigned char sense_buff[SDEBUG_SENSE_LEN]; /* weak nexus */ unsigned int channel; unsigned int target; unsigned int lun; struct sdebug_host_info *sdbg_host; unsigned int wlun; char reset; 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); typedef void (* done_funct_t) (struct scsi_cmnd *); struct sdebug_queued_cmd { int in_use; struct timer_list cmnd_timer; done_funct_t done_funct; struct scsi_cmnd * a_cmnd; int scsi_result; }; static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE]; static struct scsi_host_template sdebug_driver_template = { .proc_info = scsi_debug_proc_info, .name = "SCSI DEBUG", .info = scsi_debug_info, .slave_alloc = scsi_debug_slave_alloc, .slave_configure = scsi_debug_slave_configure, .slave_destroy = scsi_debug_slave_destroy, .ioctl = scsi_debug_ioctl, .queuecommand = scsi_debug_queuecommand, .eh_abort_handler = scsi_debug_abort, .eh_bus_reset_handler = scsi_debug_bus_reset, .eh_device_reset_handler = scsi_debug_device_reset, .eh_host_reset_handler = scsi_debug_host_reset, .bios_param = scsi_debug_biosparam, .can_queue = SCSI_DEBUG_CANQUEUE, .this_id = 7, .sg_tablesize = 256, .cmd_per_lun = 16, .max_sectors = 0xffff, .unchecked_isa_dma = 0, .use_clustering = ENABLE_CLUSTERING, .module = THIS_MODULE, }; static unsigned char * fake_storep; /* ramdisk storage */ static int num_aborts = 0; static int num_dev_resets = 0; static int num_bus_resets = 0; static int num_host_resets = 0; static DEFINE_SPINLOCK(queued_arr_lock); static DEFINE_RWLOCK(atomic_rw); static char sdebug_proc_name[] = "scsi_debug"; static int sdebug_driver_probe(struct device *); static int sdebug_driver_remove(struct device *); 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 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}; /* function declarations */ 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_start_stop(struct scsi_cmnd * scp, struct sdebug_dev_info * devip); static int resp_report_tgtpgs(struct scsi_cmnd * scp, struct sdebug_dev_info * devip); static int resp_readcap(struct scsi_cmnd * SCpnt, struct sdebug_dev_info * devip); static int resp_readcap16(struct scsi_cmnd * SCpnt, struct sdebug_dev_info * devip); static int resp_mode_sense(struct scsi_cmnd * scp, int target, struct sdebug_dev_info * devip); static int resp_mode_select(struct scsi_cmnd * scp, int mselect6, struct sdebug_dev_info * devip); static int resp_log_sense(struct scsi_cmnd * scp, struct sdebug_dev_info * devip); static int resp_read(struct scsi_cmnd * SCpnt, unsigned long long lba, unsigned int num, struct sdebug_dev_info * devip); static int resp_write(struct scsi_cmnd * SCpnt, unsigned long long lba, unsigned int num, 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); static int check_readiness(struct scsi_cmnd * SCpnt, int reset_only, struct sdebug_dev_info * devip); static int schedule_resp(struct scsi_cmnd * cmnd, struct sdebug_dev_info * devip, done_funct_t done, int scsi_result, int delta_jiff); static void __init sdebug_build_parts(unsigned char * ramp); static void __init init_all_queued(void); static void stop_all_queued(void); static int stop_queued_cmnd(struct scsi_cmnd * cmnd); 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); static int inquiry_evpd_88(unsigned char * arr, int target_dev_id); static int do_create_driverfs_files(void); static void do_remove_driverfs_files(void); static int sdebug_add_adapter(void); static void sdebug_remove_adapter(void); static void sdebug_max_tgts_luns(void); static struct device pseudo_primary; static struct bus_type pseudo_lld_bus; static int scsi_debug_queuecommand(struct scsi_cmnd * SCpnt, done_funct_t done) { unsigned char *cmd = (unsigned char *) SCpnt->cmnd; int len, k, j; unsigned int num; unsigned long long lba; int errsts = 0; int target = SCpnt->device->id; struct sdebug_dev_info * devip = NULL; int inj_recovered = 0; int inj_transport = 0; int delay_override = 0; if (done == NULL) return 0; /* assume mid level reprocessing command */ SCpnt->resid = 0; if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmd) { printk(KERN_INFO "scsi_debug: cmd "); for (k = 0, len = SCpnt->cmd_len; k < len; ++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 ((SCpnt->device->lun >= scsi_debug_max_luns) && (SCpnt->device->lun != SAM2_WLUN_REPORT_LUNS)) return schedule_resp(SCpnt, NULL, done, DID_NO_CONNECT << 16, 0); devip = devInfoReg(SCpnt->device); if (NULL == devip) return schedule_resp(SCpnt, NULL, done, DID_NO_CONNECT << 16, 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) inj_recovered = 1; /* to reads and writes below */ else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & scsi_debug_opts) inj_transport = 1; /* to reads and writes below */ } if (devip->wlun) { switch (*cmd) { case INQUIRY: case REQUEST_SENSE: case TEST_UNIT_READY: case REPORT_LUNS: break; /* only allowable wlun commands */ default: if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) printk(KERN_INFO "scsi_debug: Opcode: 0x%x " "not supported for wlun\n", *cmd); mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0); errsts = check_condition_result; return schedule_resp(SCpnt, devip, done, errsts, 0); } } switch (*cmd) { case INQUIRY: /* mandatory, ignore unit attention */ delay_override = 1; errsts = resp_inquiry(SCpnt, target, devip); break; case REQUEST_SENSE: /* mandatory, ignore unit attention */ delay_override = 1; errsts = resp_requests(SCpnt, devip); break; case REZERO_UNIT: /* actually this is REWIND for SSC */ case START_STOP: errsts = resp_start_stop(SCpnt, devip); break; case ALLOW_MEDIUM_REMOVAL: if ((errsts = check_readiness(SCpnt, 1, devip))) break; if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) printk(KERN_INFO "scsi_debug: Medium removal %s\n", cmd[4] ? "inhibited" : "enabled"); break; case SEND_DIAGNOSTIC: /* mandatory */ errsts = check_readiness(SCpnt, 1, devip); break; case TEST_UNIT_READY: /* mandatory */ delay_override = 1; errsts = check_readiness(SCpnt, 0, devip); break; case RESERVE: errsts = check_readiness(SCpnt, 1, devip); break; case RESERVE_10: errsts = check_readiness(SCpnt, 1, devip); break; case RELEASE: errsts = check_readiness(SCpnt, 1, devip); break; case RELEASE_10: errsts = check_readiness(SCpnt, 1, devip); break; case READ_CAPACITY: errsts = resp_readcap(SCpnt, devip); break; case SERVICE_ACTION_IN: if (SAI_READ_CAPACITY_16 != cmd[1]) { mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0); errsts = check_condition_result; break; } errsts = resp_readcap16(SCpnt, devip); break; case MAINTENANCE_IN: if (MI_REPORT_TARGET_PGS != cmd[1]) { mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0); errsts = check_condition_result; break; } errsts = resp_report_tgtpgs(SCpnt, devip); break; case READ_16: case READ_12: case READ_10: 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) lba <<= 8; lba += cmd[2 + j]; } num = cmd[13] + (cmd[12] << 8) + (cmd[11] << 16) + (cmd[10] << 24); } else if ((*cmd) == READ_12) { lba = cmd[5] + (cmd[4] << 8) + (cmd[3] << 16) + (cmd[2] << 24); num = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24); } else if ((*cmd) == READ_10) { lba = cmd[5] + (cmd[4] << 8) + (cmd[3] << 16) + (cmd[2] << 24); num = cmd[8] + (cmd[7] << 8); } else { /* READ (6) */ lba = cmd[3] + (cmd[2] << 8) + ((cmd[1] & 0x1f) << 16); num = (0 == cmd[4]) ? 256 : cmd[4]; } errsts = resp_read(SCpnt, lba, num, devip); if (inj_recovered && (0 == errsts)) { mk_sense_buffer(devip, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0); errsts = check_condition_result; } else if (inj_transport && (0 == errsts)) { mk_sense_buffer(devip, ABORTED_COMMAND, TRANSPORT_PROBLEM, ACK_NAK_TO); errsts = check_condition_result; } break; case REPORT_LUNS: /* mandatory, ignore unit attention */ delay_override = 1; errsts = resp_report_luns(SCpnt, devip); break; case VERIFY: /* 10 byte SBC-2 command */ errsts = check_readiness(SCpnt, 0, devip); break; case WRITE_16: case WRITE_12: case WRITE_10: 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) lba <<= 8; lba += cmd[2 + j]; } num = cmd[13] + (cmd[12] << 8) + (cmd[11] << 16) + (cmd[10] << 24); } else if ((*cmd) == WRITE_12) { lba = cmd[5] + (cmd[4] << 8) + (cmd[3] << 16) + (cmd[2] << 24); num = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24); } else if ((*cmd) == WRITE_10) { lba = cmd[5] + (cmd[4] << 8) + (cmd[3] << 16) + (cmd[2] << 24); num = cmd[8] + (cmd[7] << 8); } else { /* WRITE (6) */ lba = cmd[3] + (cmd[2] << 8) + ((cmd[1] & 0x1f) << 16); num = (0 == cmd[4]) ? 256 : cmd[4]; } errsts = resp_write(SCpnt, lba, num, devip); if (inj_recovered && (0 == errsts)) { mk_sense_buffer(devip, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0); errsts = check_condition_result; } break; case MODE_SENSE: case MODE_SENSE_10: errsts = resp_mode_sense(SCpnt, target, devip); break; case MODE_SELECT: errsts = resp_mode_select(SCpnt, 1, devip); break; case MODE_SELECT_10: errsts = resp_mode_select(SCpnt, 0, devip); break; case LOG_SENSE: errsts = resp_log_sense(SCpnt, devip); break; case SYNCHRONIZE_CACHE: delay_override = 1; errsts = check_readiness(SCpnt, 0, devip); break; case WRITE_BUFFER: errsts = check_readiness(SCpnt, 1, 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_readiness(SCpnt, 1, devip))) break; /* Unit attention takes precedence */ mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0); errsts = check_condition_result; break; } return schedule_resp(SCpnt, devip, done, errsts, (delay_override ? 0 : scsi_debug_delay)); } static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg) { if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) { printk(KERN_INFO "scsi_debug: ioctl: cmd=0x%x\n", cmd); } return -EINVAL; /* return -ENOTTY; // correct return but upsets fdisk */ } static int check_readiness(struct scsi_cmnd * SCpnt, int reset_only, 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); return check_condition_result; } if ((0 == reset_only) && devip->stopped) { if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) printk(KERN_INFO "scsi_debug: Reporting Not " "ready: initializing command required\n"); mk_sense_buffer(devip, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2); 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 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); if (scp->resid) scp->resid -= act_len; else 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; } if (scp->resid) scp->resid -= act_len; else 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 * 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 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, }; static int inquiry_evpd_84(unsigned char * arr) { memcpy(arr, vpd84_data, sizeof(vpd84_data)); return sizeof(vpd84_data); } 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, }; 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, }; static int inquiry_evpd_b0(unsigned char * arr) { memcpy(arr, vpdb0_data, sizeof(vpdb0_data)); 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; } return sizeof(vpdb0_data); } #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 = (unsigned char *)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(devip, 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[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 */ 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 { /* Illegal request, invalid field in cdb */ mk_sense_buffer(devip, 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] = 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; 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] = 0x77; /* SAM-3 ANSI */ arr[60] = 0x3; arr[61] = 0x14; /* SPC-3 ANSI */ n = 62; if (scsi_debug_ptype == 0) { arr[n++] = 0x3; arr[n++] = 0x3d; /* SBC-2 ANSI */ } else if (scsi_debug_ptype == 1) { arr[n++] = 0x3; arr[n++] = 0x60; /* SSC-2 no version */ } arr[n++] = 0xc; arr[n++] = 0xf; /* SAS-1.1 rev 10 */ 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 = (unsigned char *)scp->cmnd; unsigned char arr[SDEBUG_SENSE_LEN]; int want_dsense; int len = 18; memset(arr, 0, sizeof(arr)); if (devip->reset == 1) mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0); want_dsense = !!(cmd[1] & 1) || scsi_debug_dsense; sbuff = devip->sense_buff; 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, SDEBUG_SENSE_LEN); 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(devip, 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 = (unsigned char *)scp->cmnd; int power_cond, errsts, start; if ((errsts = check_readiness(scp, 1, devip))) return errsts; power_cond = (cmd[4] & 0xf0) >> 4; if (power_cond) { mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } start = cmd[4] & 1; if (start == devip->stopped) devip->stopped = !start; return 0; } #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; if ((errsts = check_readiness(scp, 1, devip))) return errsts; /* following just in case virtual_gb changed */ if (scsi_debug_virtual_gb > 0) { sdebug_capacity = 2048 * 1024; sdebug_capacity *= scsi_debug_virtual_gb; } else sdebug_capacity = sdebug_store_sectors; 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] = (SECT_SIZE_PER(target) >> 8) & 0xff; arr[7] = SECT_SIZE_PER(target) & 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 = (unsigned char *)scp->cmnd; unsigned char arr[SDEBUG_READCAP16_ARR_SZ]; unsigned long long capac; int errsts, k, alloc_len; if ((errsts = check_readiness(scp, 1, devip))) return errsts; alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8) + cmd[13]); /* following just in case virtual_gb changed */ if (scsi_debug_virtual_gb > 0) { sdebug_capacity = 2048 * 1024; sdebug_capacity *= scsi_debug_virtual_gb; } else sdebug_capacity = sdebug_store_sectors; 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] = (SECT_SIZE_PER(target) >> 24) & 0xff; arr[9] = (SECT_SIZE_PER(target) >> 16) & 0xff; arr[10] = (SECT_SIZE_PER(target) >> 8) & 0xff; arr[11] = SECT_SIZE_PER(target) & 0xff; 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 = (unsigned char *)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] = (SECT_SIZE >> 8) & 0xff; p[13] = SECT_SIZE & 0xff; if (DEV_REMOVEABLE(target)) 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 caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0}; memcpy(p, caching_pg, sizeof(caching_pg)); if (1 == pcontrol) memset(p + 2, 0, sizeof(caching_pg) - 2); 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; 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 = (unsigned char *)scp->cmnd; if ((errsts = check_readiness(scp, 1, 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]); 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(devip, 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) && (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 */ 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); 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(devip, 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(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } offset += len; break; default: mk_sense_buffer(devip, 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 = (unsigned char *)scp->cmnd; if ((errsts = check_readiness(scp, 1, devip))) 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(devip, 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)) printk(KERN_INFO "scsi_debug: mode_select: cdb indicated=%d, " " 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) { mk_sense_buffer(devip, 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(devip, 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(devip, ILLEGAL_REQUEST, PARAMETER_LIST_LENGTH_ERR, 0); return check_condition_result; } switch (mpage) { 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); return 0; } 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); return 0; } break; default: break; } mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_PARAM_LIST, 0); return check_condition_result; } 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 = (unsigned char *)scp->cmnd; if ((errsts = check_readiness(scp, 1, devip))) return errsts; memset(arr, 0, sizeof(arr)); ppc = cmd[1] & 0x2; sp = cmd[1] & 0x1; if (ppc || sp) { mk_sense_buffer(devip, 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(devip, 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(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)); } static int resp_read(struct scsi_cmnd * SCpnt, unsigned long long lba, unsigned int num, struct sdebug_dev_info * devip) { unsigned long iflags; unsigned int block, from_bottom; unsigned long long u; int ret; if (lba + num > sdebug_capacity) { mk_sense_buffer(devip, 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(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) && (lba <= OPT_MEDIUM_ERR_ADDR) && ((lba + num) > OPT_MEDIUM_ERR_ADDR)) { /* claim unrecoverable read error */ mk_sense_buffer(devip, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0); /* set info field and valid bit for fixed descriptor */ if (0x70 == (devip->sense_buff[0] & 0x7f)) { devip->sense_buff[0] |= 0x80; /* Valid bit */ ret = OPT_MEDIUM_ERR_ADDR; devip->sense_buff[3] = (ret >> 24) & 0xff; devip->sense_buff[4] = (ret >> 16) & 0xff; devip->sense_buff[5] = (ret >> 8) & 0xff; devip->sense_buff[6] = ret & 0xff; } return check_condition_result; } read_lock_irqsave(&atomic_rw, iflags); if ((lba + num) <= sdebug_store_sectors) ret = fill_from_dev_buffer(SCpnt, fake_storep + (lba * SECT_SIZE), num * SECT_SIZE); else { /* modulo when one arg is 64 bits needs do_div() */ u = lba; block = do_div(u, sdebug_store_sectors); from_bottom = 0; if ((block + num) > sdebug_store_sectors) from_bottom = (block + num) - sdebug_store_sectors; ret = fill_from_dev_buffer(SCpnt, fake_storep + (block * SECT_SIZE), (num - from_bottom) * SECT_SIZE); if ((0 == ret) && (from_bottom > 0)) ret = fill_from_dev_buffer(SCpnt, fake_storep, from_bottom * SECT_SIZE); } read_unlock_irqrestore(&atomic_rw, iflags); return ret; } static int resp_write(struct scsi_cmnd * SCpnt, unsigned long long lba, unsigned int num, struct sdebug_dev_info * devip) { unsigned long iflags; unsigned int block, to_bottom; unsigned long long u; int res; if (lba + num > sdebug_capacity) { mk_sense_buffer(devip, 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(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } write_lock_irqsave(&atomic_rw, iflags); if ((lba + num) <= sdebug_store_sectors) res = fetch_to_dev_buffer(SCpnt, fake_storep + (lba * SECT_SIZE), num * SECT_SIZE); else { /* modulo when one arg is 64 bits needs do_div() */ u = lba; block = do_div(u, sdebug_store_sectors); to_bottom = 0; if ((block + num) > sdebug_store_sectors) to_bottom = (block + num) - sdebug_store_sectors; res = fetch_to_dev_buffer(SCpnt, fake_storep + (block * SECT_SIZE), (num - to_bottom) * SECT_SIZE); if ((0 == res) && (to_bottom > 0)) res = fetch_to_dev_buffer(SCpnt, fake_storep, to_bottom * 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=%u, " " IO sent=%d bytes\n", num * SECT_SIZE, res); return 0; } #define SDEBUG_RLUN_ARR_SZ 256 static int resp_report_luns(struct scsi_cmnd * scp, struct sdebug_dev_info * devip) { unsigned int alloc_len; int lun_cnt, i, upper, num, n, wlun, lun; 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]; unsigned char * max_addr; alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24); if ((alloc_len < 4) || (select_report > 2)) { mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } /* 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; if (1 == select_report) lun_cnt = 0; else if (scsi_debug_no_lun_0 && (lun_cnt > 0)) --lun_cnt; wlun = (select_report > 0) ? 1 : 0; num = lun_cnt + wlun; arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff; arr[3] = (sizeof(struct scsi_lun) * num) & 0xff; n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) / sizeof(struct scsi_lun)), num); if (n < num) { wlun = 0; lun_cnt = n; } one_lun = (struct scsi_lun *) &arr[8]; max_addr = arr + SDEBUG_RLUN_ARR_SZ; for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0); ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr)); i++, lun++) { upper = (lun >> 8) & 0x3f; if (upper) one_lun[i].scsi_lun[0] = (upper | (SAM2_LUN_ADDRESS_METHOD << 6)); one_lun[i].scsi_lun[1] = lun & 0xff; } if (wlun) { one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff; one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff; i++; } alloc_len = (unsigned char *)(one_lun + i) - arr; return fill_from_dev_buffer(scp, arr, min((int)alloc_len, SDEBUG_RLUN_ARR_SZ)); } /* When timer goes off this function is called. */ static void timer_intr_handler(unsigned long indx) { struct sdebug_queued_cmd * sqcp; unsigned long iflags; if (indx >= SCSI_DEBUG_CANQUEUE) { printk(KERN_ERR "scsi_debug:timer_intr_handler: indx too " "large\n"); return; } spin_lock_irqsave(&queued_arr_lock, iflags); sqcp = &queued_arr[(int)indx]; if (! sqcp->in_use) { printk(KERN_ERR "scsi_debug:timer_intr_handler: Unexpected " "interrupt\n"); spin_unlock_irqrestore(&queued_arr_lock, iflags); return; } sqcp->in_use = 0; if (sqcp->done_funct) { sqcp->a_cmnd->result = sqcp->scsi_result; sqcp->done_funct(sqcp->a_cmnd); /* callback to mid level */ } sqcp->done_funct = NULL; spin_unlock_irqrestore(&queued_arr_lock, iflags); } static int scsi_debug_slave_alloc(struct scsi_device * sdp) { if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %u>\n", sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); return 0; } static int scsi_debug_slave_configure(struct scsi_device * sdp) { struct sdebug_dev_info * devip; if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %u>\n", sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN) sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN; devip = devInfoReg(sdp); if (NULL == devip) return 1; /* no resources, will be marked offline */ sdp->hostdata = devip; if (sdp->host->cmd_per_lun) scsi_adjust_queue_depth(sdp, SDEBUG_TAGGED_QUEUING, sdp->host->cmd_per_lun); blk_queue_max_segment_size(sdp->request_queue, 256 * 1024); return 0; } static void scsi_debug_slave_destroy(struct scsi_device * sdp) { struct sdebug_dev_info * devip = (struct sdebug_dev_info *)sdp->hostdata; if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %u>\n", sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); if (devip) { /* make this slot avaliable for re-use */ devip->used = 0; sdp->hostdata = NULL; } } static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev) { struct sdebug_host_info * sdbg_host; struct sdebug_dev_info * open_devip = NULL; struct sdebug_dev_info * devip = (struct sdebug_dev_info *)sdev->hostdata; if (devip) return devip; sdbg_host = *(struct sdebug_host_info **) sdev->host->hostdata; if(! sdbg_host) { printk(KERN_ERR "Host info NULL\n"); return NULL; } list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) { if ((devip->used) && (devip->channel == sdev->channel) && (devip->target == sdev->id) && (devip->lun == sdev->lun)) return devip; else { if ((!devip->used) && (!open_devip)) open_devip = devip; } } if (NULL == open_devip) { /* try and make a new one */ open_devip = kzalloc(sizeof(*open_devip),GFP_ATOMIC); if (NULL == open_devip) { printk(KERN_ERR "%s: out of memory at line %d\n", __FUNCTION__, __LINE__); return NULL; } open_devip->sdbg_host = sdbg_host; list_add_tail(&open_devip->dev_list, &sdbg_host->dev_info_list); } if (open_devip) { open_devip->channel = sdev->channel; open_devip->target = sdev->id; open_devip->lun = sdev->lun; open_devip->sdbg_host = sdbg_host; open_devip->reset = 1; open_devip->used = 1; memset(open_devip->sense_buff, 0, SDEBUG_SENSE_LEN); if (scsi_debug_dsense) open_devip->sense_buff[0] = 0x72; else { open_devip->sense_buff[0] = 0x70; open_devip->sense_buff[7] = 0xa; } if (sdev->lun == SAM2_WLUN_REPORT_LUNS) open_devip->wlun = SAM2_WLUN_REPORT_LUNS & 0xff; return open_devip; } return NULL; } static void mk_sense_buffer(struct sdebug_dev_info * devip, int key, int asc, int asq) { unsigned char * sbuff; sbuff = devip->sense_buff; memset(sbuff, 0, SDEBUG_SENSE_LEN); 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) { if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) printk(KERN_INFO "scsi_debug: abort\n"); ++num_aborts; stop_queued_cmnd(SCpnt); return SUCCESS; } static int scsi_debug_biosparam(struct scsi_device *sdev, struct block_device * bdev, sector_t capacity, int *info) { int res; unsigned char *buf; if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) printk(KERN_INFO "scsi_debug: biosparam\n"); buf = scsi_bios_ptable(bdev); if (buf) { res = scsi_partsize(buf, capacity, &info[2], &info[0], &info[1]); kfree(buf); if (! res) return res; } info[0] = sdebug_heads; info[1] = sdebug_sectors_per; info[2] = sdebug_cylinders_per; return 0; } static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt) { struct sdebug_dev_info * devip; if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) printk(KERN_INFO "scsi_debug: device_reset\n"); ++num_dev_resets; if (SCpnt) { devip = devInfoReg(SCpnt->device); if (devip) devip->reset = 1; } return SUCCESS; } static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt) { struct sdebug_host_info *sdbg_host; struct sdebug_dev_info * dev_info; struct scsi_device * sdp; struct Scsi_Host * hp; if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) printk(KERN_INFO "scsi_debug: bus_reset\n"); ++num_bus_resets; if (SCpnt && ((sdp = SCpnt->device)) && ((hp = sdp->host))) { sdbg_host = *(struct sdebug_host_info **) hp->hostdata; if (sdbg_host) { list_for_each_entry(dev_info, &sdbg_host->dev_info_list, dev_list) dev_info->reset = 1; } } return SUCCESS; } static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt) { struct sdebug_host_info * sdbg_host; struct sdebug_dev_info * dev_info; if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) printk(KERN_INFO "scsi_debug: host_reset\n"); ++num_host_resets; spin_lock(&sdebug_host_list_lock); list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { list_for_each_entry(dev_info, &sdbg_host->dev_info_list, dev_list) dev_info->reset = 1; } spin_unlock(&sdebug_host_list_lock); stop_all_queued(); return SUCCESS; } /* Returns 1 if found 'cmnd' and deleted its timer. else returns 0 */ static int stop_queued_cmnd(struct scsi_cmnd * cmnd) { unsigned long iflags; int k; struct sdebug_queued_cmd * sqcp; spin_lock_irqsave(&queued_arr_lock, iflags); for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) { sqcp = &queued_arr[k]; if (sqcp->in_use && (cmnd == sqcp->a_cmnd)) { del_timer_sync(&sqcp->cmnd_timer); sqcp->in_use = 0; sqcp->a_cmnd = NULL; break; } } spin_unlock_irqrestore(&queued_arr_lock, iflags); return (k < SCSI_DEBUG_CANQUEUE) ? 1 : 0; } /* Deletes (stops) timers of all queued commands */ static void stop_all_queued(void) { unsigned long iflags; int k; struct sdebug_queued_cmd * sqcp; spin_lock_irqsave(&queued_arr_lock, iflags); for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) { sqcp = &queued_arr[k]; if (sqcp->in_use && sqcp->a_cmnd) { del_timer_sync(&sqcp->cmnd_timer); sqcp->in_use = 0; sqcp->a_cmnd = NULL; } } spin_unlock_irqrestore(&queued_arr_lock, iflags); } /* Initializes timers in queued array */ static void __init init_all_queued(void) { unsigned long iflags; int k; struct sdebug_queued_cmd * sqcp; spin_lock_irqsave(&queued_arr_lock, iflags); for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) { sqcp = &queued_arr[k]; init_timer(&sqcp->cmnd_timer); sqcp->in_use = 0; sqcp->a_cmnd = NULL; } spin_unlock_irqrestore(&queued_arr_lock, iflags); } static void __init sdebug_build_parts(unsigned char * ramp) { struct partition * pp; int starts[SDEBUG_MAX_PARTS + 2]; int sectors_per_part, num_sectors, k; int heads_by_sects, start_sec, end_sec; /* assume partition table already zeroed */ if ((scsi_debug_num_parts < 1) || (sdebug_store_size < 1048576)) return; if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) { scsi_debug_num_parts = SDEBUG_MAX_PARTS; printk(KERN_WARNING "scsi_debug:build_parts: reducing " "partitions to %d\n", SDEBUG_MAX_PARTS); } num_sectors = (int)sdebug_store_sectors; sectors_per_part = (num_sectors - sdebug_sectors_per) / scsi_debug_num_parts; heads_by_sects = sdebug_heads * sdebug_sectors_per; starts[0] = sdebug_sectors_per; for (k = 1; k < scsi_debug_num_parts; ++k) starts[k] = ((k * sectors_per_part) / heads_by_sects) * heads_by_sects; starts[scsi_debug_num_parts] = num_sectors; starts[scsi_debug_num_parts + 1] = 0; ramp[510] = 0x55; /* magic partition markings */ ramp[511] = 0xAA; pp = (struct partition *)(ramp + 0x1be); for (k = 0; starts[k + 1]; ++k, ++pp) { start_sec = starts[k]; end_sec = starts[k + 1] - 1; pp->boot_ind = 0; pp->cyl = start_sec / heads_by_sects; pp->head = (start_sec - (pp->cyl * heads_by_sects)) / sdebug_sectors_per; pp->sector = (start_sec % sdebug_sectors_per) + 1; pp->end_cyl = end_sec / heads_by_sects; pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects)) / sdebug_sectors_per; pp->end_sector = (end_sec % sdebug_sectors_per) + 1; pp->start_sect = start_sec; pp->nr_sects = end_sec - start_sec + 1; pp->sys_ind = 0x83; /* plain Linux partition */ } } static int schedule_resp(struct scsi_cmnd * cmnd, struct sdebug_dev_info * devip, done_funct_t done, int scsi_result, int delta_jiff) { if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmnd) { if (scsi_result) { struct scsi_device * sdp = cmnd->device; 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); } } if (cmnd && devip) { /* simulate autosense by this driver */ if (SAM_STAT_CHECK_CONDITION == (scsi_result & 0xff)) memcpy(cmnd->sense_buffer, devip->sense_buff, (SCSI_SENSE_BUFFERSIZE > SDEBUG_SENSE_LEN) ? SDEBUG_SENSE_LEN : SCSI_SENSE_BUFFERSIZE); } if (delta_jiff <= 0) { if (cmnd) cmnd->result = scsi_result; if (done) done(cmnd); return 0; } else { unsigned long iflags; int k; struct sdebug_queued_cmd * sqcp = NULL; spin_lock_irqsave(&queued_arr_lock, iflags); for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) { sqcp = &queued_arr[k]; if (! sqcp->in_use) break; } if (k >= SCSI_DEBUG_CANQUEUE) { spin_unlock_irqrestore(&queued_arr_lock, iflags); printk(KERN_WARNING "scsi_debug: can_queue exceeded\n"); return 1; /* report busy to mid level */ } sqcp->in_use = 1; sqcp->a_cmnd = cmnd; sqcp->scsi_result = scsi_result; sqcp->done_funct = done; sqcp->cmnd_timer.function = timer_intr_handler; sqcp->cmnd_timer.data = k; sqcp->cmnd_timer.expires = jiffies + delta_jiff; add_timer(&sqcp->cmnd_timer); spin_unlock_irqrestore(&queued_arr_lock, iflags); if (cmnd) cmnd->result = 0; return 0; } } /* 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); module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR); 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"); MODULE_LICENSE("GPL"); MODULE_VERSION(SCSI_DEBUG_VERSION); 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(def=8)"); MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)"); MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)"); 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)"); MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)"); MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (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]; static const char * scsi_debug_info(struct Scsi_Host * shp) { sprintf(sdebug_info, "scsi_debug, version %s [%s], " "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION, scsi_debug_version_date, scsi_debug_dev_size_mb, scsi_debug_opts); return sdebug_info; } /* scsi_debug_proc_info * Used if the driver currently has no own support for /proc/scsi */ static int scsi_debug_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset, int length, int inout) { int len, pos, begin; int orig_length; orig_length = length; if (inout == 1) { char arr[16]; int minLen = length > 15 ? 15 : length; if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) return -EACCES; memcpy(arr, buffer, minLen); arr[minLen] = '\0'; if (1 != sscanf(arr, "%d", &pos)) return -EINVAL; scsi_debug_opts = pos; if (scsi_debug_every_nth != 0) scsi_debug_cmnd_count = 0; return length; } begin = 0; pos = len = sprintf(buffer, "scsi_debug adapter driver, version " "%s [%s]\n" "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, " "every_nth=%d(curr:%d)\n" "delay=%d, max_luns=%d, scsi_level=%d\n" "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n" "number of aborts=%d, device_reset=%d, bus_resets=%d, " "host_resets=%d\n", SCSI_DEBUG_VERSION, scsi_debug_version_date, scsi_debug_num_tgts, scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth, scsi_debug_cmnd_count, scsi_debug_delay, scsi_debug_max_luns, scsi_debug_scsi_level, SECT_SIZE, sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per, num_aborts, num_dev_resets, num_bus_resets, num_host_resets); if (pos < offset) { len = 0; begin = pos; } *start = buffer + (offset - begin); /* Start of wanted data */ len -= (offset - begin); if (len > length) len = length; return len; } static ssize_t sdebug_delay_show(struct device_driver * ddp, char * buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay); } static ssize_t sdebug_delay_store(struct device_driver * ddp, const char * buf, size_t count) { int delay; char work[20]; if (1 == sscanf(buf, "%10s", work)) { if ((1 == sscanf(work, "%d", &delay)) && (delay >= 0)) { scsi_debug_delay = delay; return count; } } return -EINVAL; } DRIVER_ATTR(delay, S_IRUGO | S_IWUSR, sdebug_delay_show, sdebug_delay_store); static ssize_t sdebug_opts_show(struct device_driver * ddp, char * buf) { return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts); } static ssize_t sdebug_opts_store(struct device_driver * ddp, const char * buf, size_t count) { int opts; char work[20]; if (1 == sscanf(buf, "%10s", work)) { if (0 == strnicmp(work,"0x", 2)) { if (1 == sscanf(&work[2], "%x", &opts)) goto opts_done; } else { if (1 == sscanf(work, "%d", &opts)) goto opts_done; } } return -EINVAL; opts_done: scsi_debug_opts = opts; scsi_debug_cmnd_count = 0; return count; } DRIVER_ATTR(opts, S_IRUGO | S_IWUSR, sdebug_opts_show, sdebug_opts_store); static ssize_t sdebug_ptype_show(struct device_driver * ddp, char * buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype); } static ssize_t sdebug_ptype_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_ptype = n; return count; } return -EINVAL; } 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_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); } static ssize_t sdebug_no_lun_0_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_no_lun_0 = n; return count; } return -EINVAL; } DRIVER_ATTR(no_lun_0, S_IRUGO | S_IWUSR, sdebug_no_lun_0_show, sdebug_no_lun_0_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); } static ssize_t sdebug_num_tgts_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_num_tgts = n; sdebug_max_tgts_luns(); return count; } return -EINVAL; } DRIVER_ATTR(num_tgts, S_IRUGO | S_IWUSR, sdebug_num_tgts_show, sdebug_num_tgts_store); static ssize_t sdebug_dev_size_mb_show(struct device_driver * ddp, char * buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb); } DRIVER_ATTR(dev_size_mb, S_IRUGO, sdebug_dev_size_mb_show, NULL); static ssize_t sdebug_num_parts_show(struct device_driver * ddp, char * buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts); } DRIVER_ATTR(num_parts, S_IRUGO, sdebug_num_parts_show, NULL); static ssize_t sdebug_every_nth_show(struct device_driver * ddp, char * buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth); } static ssize_t sdebug_every_nth_store(struct device_driver * ddp, const char * buf, size_t count) { int nth; if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) { scsi_debug_every_nth = nth; scsi_debug_cmnd_count = 0; return count; } return -EINVAL; } DRIVER_ATTR(every_nth, S_IRUGO | S_IWUSR, sdebug_every_nth_show, sdebug_every_nth_store); static ssize_t sdebug_max_luns_show(struct device_driver * ddp, char * buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns); } static ssize_t sdebug_max_luns_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_max_luns = n; sdebug_max_tgts_luns(); return count; } return -EINVAL; } DRIVER_ATTR(max_luns, S_IRUGO | S_IWUSR, sdebug_max_luns_show, sdebug_max_luns_store); static ssize_t sdebug_scsi_level_show(struct device_driver * ddp, char * buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level); } DRIVER_ATTR(scsi_level, S_IRUGO, sdebug_scsi_level_show, NULL); static ssize_t sdebug_virtual_gb_show(struct device_driver * ddp, char * buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb); } static ssize_t sdebug_virtual_gb_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_virtual_gb = n; if (scsi_debug_virtual_gb > 0) { sdebug_capacity = 2048 * 1024; sdebug_capacity *= scsi_debug_virtual_gb; } else sdebug_capacity = sdebug_store_sectors; return count; } return -EINVAL; } DRIVER_ATTR(virtual_gb, S_IRUGO | S_IWUSR, sdebug_virtual_gb_show, sdebug_virtual_gb_store); static ssize_t sdebug_add_host_show(struct device_driver * ddp, char * buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host); } static ssize_t sdebug_add_host_store(struct device_driver * ddp, const char * buf, size_t count) { int delta_hosts; char work[20]; if (1 != sscanf(buf, "%10s", work)) return -EINVAL; { /* temporary hack around sscanf() problem with -ve nums */ int neg = 0; if ('-' == *work) neg = 1; if (1 != sscanf(work + neg, "%d", &delta_hosts)) return -EINVAL; if (neg) delta_hosts = -delta_hosts; } if (delta_hosts > 0) { do { sdebug_add_adapter(); } while (--delta_hosts); } else if (delta_hosts < 0) { do { sdebug_remove_adapter(); } while (++delta_hosts); } return count; } 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; ret = driver_create_file(&sdebug_driverfs_driver, &driver_attr_add_host); ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_delay); 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_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_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); driver_remove_file(&sdebug_driverfs_driver, &driver_attr_delay); driver_remove_file(&sdebug_driverfs_driver, &driver_attr_add_host); } static int __init scsi_debug_init(void) { unsigned int sz; int host_to_add; int k; int ret; if (scsi_debug_dev_size_mb < 1) scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */ sdebug_store_size = (unsigned int)scsi_debug_dev_size_mb * 1048576; sdebug_store_sectors = sdebug_store_size / SECT_SIZE; if (scsi_debug_virtual_gb > 0) { sdebug_capacity = 2048 * 1024; sdebug_capacity *= scsi_debug_virtual_gb; } else sdebug_capacity = sdebug_store_sectors; /* play around with geometry, don't waste too much on track 0 */ sdebug_heads = 8; sdebug_sectors_per = 32; if (scsi_debug_dev_size_mb >= 16) sdebug_heads = 32; else if (scsi_debug_dev_size_mb >= 256) sdebug_heads = 64; sdebug_cylinders_per = (unsigned long)sdebug_capacity / (sdebug_sectors_per * sdebug_heads); if (sdebug_cylinders_per >= 1024) { /* other LLDs do this; implies >= 1GB ram disk ... */ sdebug_heads = 255; sdebug_sectors_per = 63; sdebug_cylinders_per = (unsigned long)sdebug_capacity / (sdebug_sectors_per * sdebug_heads); } sz = sdebug_store_size; fake_storep = vmalloc(sz); if (NULL == fake_storep) { printk(KERN_ERR "scsi_debug_init: out of memory, 1\n"); return -ENOMEM; } memset(fake_storep, 0, sz); if (scsi_debug_num_parts > 0) sdebug_build_parts(fake_storep); ret = device_register(&pseudo_primary); if (ret < 0) { printk(KERN_WARNING "scsi_debug: device_register error: %d\n", ret); goto free_vm; } ret = bus_register(&pseudo_lld_bus); if (ret < 0) { printk(KERN_WARNING "scsi_debug: bus_register error: %d\n", ret); goto dev_unreg; } ret = driver_register(&sdebug_driverfs_driver); if (ret < 0) { printk(KERN_WARNING "scsi_debug: driver_register error: %d\n", ret); goto bus_unreg; } ret = do_create_driverfs_files(); if (ret < 0) { printk(KERN_WARNING "scsi_debug: driver_create_file error: %d\n", ret); goto del_files; } init_all_queued(); sdebug_driver_template.proc_name = sdebug_proc_name; host_to_add = scsi_debug_add_host; scsi_debug_add_host = 0; for (k = 0; k < host_to_add; k++) { if (sdebug_add_adapter()) { printk(KERN_ERR "scsi_debug_init: " "sdebug_add_adapter failed k=%d\n", k); break; } } if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) { printk(KERN_INFO "scsi_debug_init: built %d host(s)\n", scsi_debug_add_host); } return 0; del_files: do_remove_driverfs_files(); driver_unregister(&sdebug_driverfs_driver); bus_unreg: bus_unregister(&pseudo_lld_bus); dev_unreg: device_unregister(&pseudo_primary); free_vm: vfree(fake_storep); return ret; } static void __exit scsi_debug_exit(void) { int k = scsi_debug_add_host; stop_all_queued(); for (; k; k--) sdebug_remove_adapter(); do_remove_driverfs_files(); driver_unregister(&sdebug_driverfs_driver); bus_unregister(&pseudo_lld_bus); device_unregister(&pseudo_primary); vfree(fake_storep); } device_initcall(scsi_debug_init); module_exit(scsi_debug_exit); static void pseudo_0_release(struct device * dev) { if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) printk(KERN_INFO "scsi_debug: pseudo_0_release() called\n"); } static struct device pseudo_primary = { .bus_id = "pseudo_0", .release = pseudo_0_release, }; static int pseudo_lld_bus_match(struct device *dev, struct device_driver *dev_driver) { return 1; } static struct bus_type pseudo_lld_bus = { .name = "pseudo", .match = pseudo_lld_bus_match, .probe = sdebug_driver_probe, .remove = sdebug_driver_remove, }; static void sdebug_release_adapter(struct device * dev) { struct sdebug_host_info *sdbg_host; sdbg_host = to_sdebug_host(dev); kfree(sdbg_host); } static int sdebug_add_adapter(void) { int k, devs_per_host; int error = 0; struct sdebug_host_info *sdbg_host; struct sdebug_dev_info *sdbg_devinfo; struct list_head *lh, *lh_sf; sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL); if (NULL == sdbg_host) { printk(KERN_ERR "%s: out of memory at line %d\n", __FUNCTION__, __LINE__); return -ENOMEM; } INIT_LIST_HEAD(&sdbg_host->dev_info_list); devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns; for (k = 0; k < devs_per_host; k++) { sdbg_devinfo = kzalloc(sizeof(*sdbg_devinfo),GFP_KERNEL); if (NULL == sdbg_devinfo) { printk(KERN_ERR "%s: out of memory at line %d\n", __FUNCTION__, __LINE__); error = -ENOMEM; goto clean; } sdbg_devinfo->sdbg_host = sdbg_host; list_add_tail(&sdbg_devinfo->dev_list, &sdbg_host->dev_info_list); } spin_lock(&sdebug_host_list_lock); list_add_tail(&sdbg_host->host_list, &sdebug_host_list); spin_unlock(&sdebug_host_list_lock); sdbg_host->dev.bus = &pseudo_lld_bus; sdbg_host->dev.parent = &pseudo_primary; sdbg_host->dev.release = &sdebug_release_adapter; sprintf(sdbg_host->dev.bus_id, "adapter%d", scsi_debug_add_host); error = device_register(&sdbg_host->dev); if (error) goto clean; ++scsi_debug_add_host; return error; clean: list_for_each_safe(lh, lh_sf, &sdbg_host->dev_info_list) { sdbg_devinfo = list_entry(lh, struct sdebug_dev_info, dev_list); list_del(&sdbg_devinfo->dev_list); kfree(sdbg_devinfo); } kfree(sdbg_host); return error; } static void sdebug_remove_adapter(void) { struct sdebug_host_info * sdbg_host = NULL; spin_lock(&sdebug_host_list_lock); if (!list_empty(&sdebug_host_list)) { sdbg_host = list_entry(sdebug_host_list.prev, struct sdebug_host_info, host_list); list_del(&sdbg_host->host_list); } spin_unlock(&sdebug_host_list_lock); if (!sdbg_host) return; device_unregister(&sdbg_host->dev); --scsi_debug_add_host; } static int sdebug_driver_probe(struct device * dev) { int error = 0; struct sdebug_host_info *sdbg_host; struct Scsi_Host *hpnt; sdbg_host = to_sdebug_host(dev); hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host)); if (NULL == hpnt) { printk(KERN_ERR "%s: scsi_register failed\n", __FUNCTION__); error = -ENODEV; return error; } sdbg_host->shost = hpnt; *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host; 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; hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* = scsi_debug_max_luns; */ error = scsi_add_host(hpnt, &sdbg_host->dev); if (error) { printk(KERN_ERR "%s: scsi_add_host failed\n", __FUNCTION__); error = -ENODEV; scsi_host_put(hpnt); } else scsi_scan_host(hpnt); return error; } static int sdebug_driver_remove(struct device * dev) { struct list_head *lh, *lh_sf; struct sdebug_host_info *sdbg_host; struct sdebug_dev_info *sdbg_devinfo; sdbg_host = to_sdebug_host(dev); if (!sdbg_host) { printk(KERN_ERR "%s: Unable to locate host info\n", __FUNCTION__); return -ENODEV; } scsi_remove_host(sdbg_host->shost); list_for_each_safe(lh, lh_sf, &sdbg_host->dev_info_list) { sdbg_devinfo = list_entry(lh, struct sdebug_dev_info, dev_list); list_del(&sdbg_devinfo->dev_list); kfree(sdbg_devinfo); } scsi_host_put(sdbg_host->shost); return 0; } 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; hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* scsi_debug_max_luns; */ } spin_unlock(&sdebug_host_list_lock); }