/* * 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://sg.danny.cz/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 max_luns+scsi_level [20021031] * Mike Anderson 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "sd.h" #include "scsi_logging.h" #define SCSI_DEBUG_VERSION "1.84" static const char *scsi_debug_version_date = "20140706"; #define MY_NAME "scsi_debug" /* Additional Sense Code (ASC) */ #define NO_ADDITIONAL_SENSE 0x0 #define LOGICAL_UNIT_NOT_READY 0x4 #define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8 #define UNRECOVERED_READ_ERR 0x11 #define PARAMETER_LIST_LENGTH_ERR 0x1a #define INVALID_OPCODE 0x20 #define ADDR_OUT_OF_RANGE 0x21 #define INVALID_COMMAND_OPCODE 0x20 #define INVALID_FIELD_IN_CDB 0x24 #define INVALID_FIELD_IN_PARAM_LIST 0x26 #define UA_RESET_ASC 0x29 #define UA_CHANGED_ASC 0x2a #define POWER_ON_RESET_ASCQ 0x0 #define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */ #define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */ #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 /* 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_ATO 1 #define DEF_DELAY 1 /* if > 0 unit is a jiffy */ #define DEF_DEV_SIZE_MB 8 #define DEF_DIF 0 #define DEF_DIX 0 #define DEF_D_SENSE 0 #define DEF_EVERY_NTH 0 #define DEF_FAKE_RW 0 #define DEF_GUARD 0 #define DEF_HOST_LOCK 0 #define DEF_LBPU 0 #define DEF_LBPWS 0 #define DEF_LBPWS10 0 #define DEF_LBPRZ 1 #define DEF_LOWEST_ALIGNED 0 #define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */ #define DEF_NO_LUN_0 0 #define DEF_NUM_PARTS 0 #define DEF_OPTS 0 #define DEF_OPT_BLKS 64 #define DEF_PHYSBLK_EXP 0 #define DEF_PTYPE 0 #define DEF_REMOVABLE false #define DEF_SCSI_LEVEL 5 /* INQUIRY, byte2 [5->SPC-3] */ #define DEF_SECTOR_SIZE 512 #define DEF_TAGGED_QUEUING 0 /* 0 | MSG_SIMPLE_TAG | MSG_ORDERED_TAG */ #define DEF_UNMAP_ALIGNMENT 0 #define DEF_UNMAP_GRANULARITY 1 #define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF #define DEF_UNMAP_MAX_DESC 256 #define DEF_VIRTUAL_GB 0 #define DEF_VPD_USE_HOSTNO 1 #define DEF_WRITESAME_LENGTH 0xFFFF #define DELAY_OVERRIDDEN -9999 /* 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 #define SCSI_DEBUG_OPT_DIF_ERR 32 #define SCSI_DEBUG_OPT_DIX_ERR 64 #define SCSI_DEBUG_OPT_MAC_TIMEOUT 128 #define SCSI_DEBUG_OPT_SHORT_TRANSFER 0x100 #define SCSI_DEBUG_OPT_Q_NOISE 0x200 #define SCSI_DEBUG_OPT_ALL_TSF 0x400 #define SCSI_DEBUG_OPT_RARE_TSF 0x800 #define SCSI_DEBUG_OPT_N_WCE 0x1000 #define SCSI_DEBUG_OPT_RESET_NOISE 0x2000 #define SCSI_DEBUG_OPT_NO_CDB_NOISE 0x4000 #define SCSI_DEBUG_OPT_ALL_NOISE (0x1 | 0x200 | 0x2000) /* 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). */ /* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs)are returned in * priority order. In the subset implemented here lower numbers have higher * priority. The UA numbers should be a sequence starting from 0 with * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */ #define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */ #define SDEBUG_UA_BUS_RESET 1 #define SDEBUG_UA_MODE_CHANGED 2 #define SDEBUG_NUM_UAS 3 /* for check_readiness() */ #define UAS_ONLY 1 #define UAS_TUR 0 /* 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 */ #define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */ /* 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 /* SCSI_DEBUG_CANQUEUE is the maximum number of commands that can be queued * (for response) at one time. Can be reduced by max_queue option. Command * responses are not queued when delay=0 and ndelay=0. The per-device * DEF_CMD_PER_LUN can be changed via sysfs: * /sys/class/scsi_device//device/queue_depth but cannot exceed * SCSI_DEBUG_CANQUEUE. */ #define SCSI_DEBUG_CANQUEUE_WORDS 9 /* a WORD is bits in a long */ #define SCSI_DEBUG_CANQUEUE (SCSI_DEBUG_CANQUEUE_WORDS * BITS_PER_LONG) #define DEF_CMD_PER_LUN 255 #if DEF_CMD_PER_LUN > SCSI_DEBUG_CANQUEUE #warning "Expect DEF_CMD_PER_LUN <= SCSI_DEBUG_CANQUEUE" #endif static int scsi_debug_add_host = DEF_NUM_HOST; static int scsi_debug_ato = DEF_ATO; static int scsi_debug_delay = DEF_DELAY; static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB; static int scsi_debug_dif = DEF_DIF; static int scsi_debug_dix = DEF_DIX; static int scsi_debug_dsense = DEF_D_SENSE; static int scsi_debug_every_nth = DEF_EVERY_NTH; static int scsi_debug_fake_rw = DEF_FAKE_RW; static unsigned int scsi_debug_guard = DEF_GUARD; static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED; static int scsi_debug_max_luns = DEF_MAX_LUNS; static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE; static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */ static int scsi_debug_ndelay = DEF_NDELAY; static int scsi_debug_no_lun_0 = DEF_NO_LUN_0; static int scsi_debug_no_uld = 0; 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_opt_blks = DEF_OPT_BLKS; static int scsi_debug_opts = DEF_OPTS; static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP; static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */ static int scsi_debug_scsi_level = DEF_SCSI_LEVEL; static int scsi_debug_sector_size = DEF_SECTOR_SIZE; static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB; static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO; static unsigned int scsi_debug_lbpu = DEF_LBPU; static unsigned int scsi_debug_lbpws = DEF_LBPWS; static unsigned int scsi_debug_lbpws10 = DEF_LBPWS10; static unsigned int scsi_debug_lbprz = DEF_LBPRZ; static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT; static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY; static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS; static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC; static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH; static bool scsi_debug_removable = DEF_REMOVABLE; static bool scsi_debug_clustering; static bool scsi_debug_host_lock = DEF_HOST_LOCK; static atomic_t sdebug_cmnd_count; static atomic_t sdebug_completions; static atomic_t sdebug_a_tsf; /* counter of 'almost' TSFs */ #define DEV_READONLY(TGT) (0) 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 */ #define SDEBUG_MAX_PARTS 4 #define SCSI_DEBUG_MAX_CMD_LEN 32 static unsigned int scsi_debug_lbp(void) { return ((0 == scsi_debug_fake_rw) && (scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10)); } struct sdebug_dev_info { struct list_head dev_list; unsigned int channel; unsigned int target; u64 lun; struct sdebug_host_info *sdbg_host; u64 wlun; unsigned long uas_bm[1]; atomic_t num_in_q; 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); struct sdebug_hrtimer { /* ... is derived from hrtimer */ struct hrtimer hrt; /* must be first element */ int qa_indx; }; struct sdebug_queued_cmd { /* in_use flagged by a bit in queued_in_use_bm[] */ struct timer_list *cmnd_timerp; struct tasklet_struct *tletp; struct sdebug_hrtimer *sd_hrtp; struct scsi_cmnd * a_cmnd; }; static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE]; static unsigned long queued_in_use_bm[SCSI_DEBUG_CANQUEUE_WORDS]; static unsigned char * fake_storep; /* ramdisk storage */ static struct sd_dif_tuple *dif_storep; /* protection info */ static void *map_storep; /* provisioning map */ static unsigned long map_size; static int num_aborts; static int num_dev_resets; static int num_target_resets; static int num_bus_resets; static int num_host_resets; static int dix_writes; static int dix_reads; static int dif_errors; static DEFINE_SPINLOCK(queued_arr_lock); static DEFINE_RWLOCK(atomic_rw); static char sdebug_proc_name[] = MY_NAME; static const char *my_name = MY_NAME; 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 const int illegal_condition_result = (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION; static const int device_qfull_result = (DID_OK << 16) | (COMMAND_COMPLETE << 8) | SAM_STAT_TASK_SET_FULL; static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0}; 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}; static void *fake_store(unsigned long long lba) { lba = do_div(lba, sdebug_store_sectors); return fake_storep + lba * scsi_debug_sector_size; } static struct sd_dif_tuple *dif_store(sector_t sector) { sector = do_div(sector, sdebug_store_sectors); return dif_storep + sector; } static int sdebug_add_adapter(void); static void sdebug_remove_adapter(void); 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; /* scsi_debug_max_luns; */ hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; } spin_unlock(&sdebug_host_list_lock); } static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq) { unsigned char *sbuff; sbuff = scp->sense_buffer; if (!sbuff) { sdev_printk(KERN_ERR, scp->device, "%s: sense_buffer is NULL\n", __func__); return; } memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE); scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq); if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n", my_name, key, asc, asq); } static void get_data_transfer_info(unsigned char *cmd, unsigned long long *lba, unsigned int *num, u32 *ei_lba) { *ei_lba = 0; switch (*cmd) { case VARIABLE_LENGTH_CMD: *lba = (u64)cmd[19] | (u64)cmd[18] << 8 | (u64)cmd[17] << 16 | (u64)cmd[16] << 24 | (u64)cmd[15] << 32 | (u64)cmd[14] << 40 | (u64)cmd[13] << 48 | (u64)cmd[12] << 56; *ei_lba = (u32)cmd[23] | (u32)cmd[22] << 8 | (u32)cmd[21] << 16 | (u32)cmd[20] << 24; *num = (u32)cmd[31] | (u32)cmd[30] << 8 | (u32)cmd[29] << 16 | (u32)cmd[28] << 24; break; case WRITE_SAME_16: case WRITE_16: case READ_16: *lba = (u64)cmd[9] | (u64)cmd[8] << 8 | (u64)cmd[7] << 16 | (u64)cmd[6] << 24 | (u64)cmd[5] << 32 | (u64)cmd[4] << 40 | (u64)cmd[3] << 48 | (u64)cmd[2] << 56; *num = (u32)cmd[13] | (u32)cmd[12] << 8 | (u32)cmd[11] << 16 | (u32)cmd[10] << 24; break; case WRITE_12: case READ_12: *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 | (u32)cmd[2] << 24; *num = (u32)cmd[9] | (u32)cmd[8] << 8 | (u32)cmd[7] << 16 | (u32)cmd[6] << 24; break; case WRITE_SAME: case WRITE_10: case READ_10: case XDWRITEREAD_10: *lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 | (u32)cmd[2] << 24; *num = (u32)cmd[8] | (u32)cmd[7] << 8; break; case WRITE_6: case READ_6: *lba = (u32)cmd[3] | (u32)cmd[2] << 8 | (u32)(cmd[1] & 0x1f) << 16; *num = (0 == cmd[4]) ? 256 : cmd[4]; break; default: break; } } static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg) { if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) { if (0x1261 == cmd) sdev_printk(KERN_INFO, dev, "%s: BLKFLSBUF [0x1261]\n", __func__); else if (0x5331 == cmd) sdev_printk(KERN_INFO, dev, "%s: CDROM_GET_CAPABILITY [0x5331]\n", __func__); else sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n", __func__, cmd); } return -EINVAL; /* return -ENOTTY; // correct return but upsets fdisk */ } static int check_readiness(struct scsi_cmnd *SCpnt, int uas_only, struct sdebug_dev_info * devip) { int k; bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts); k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS); if (k != SDEBUG_NUM_UAS) { const char *cp = NULL; switch (k) { case SDEBUG_UA_POR: mk_sense_buffer(SCpnt, UNIT_ATTENTION, UA_RESET_ASC, POWER_ON_RESET_ASCQ); if (debug) cp = "power on reset"; break; case SDEBUG_UA_BUS_RESET: mk_sense_buffer(SCpnt, UNIT_ATTENTION, UA_RESET_ASC, BUS_RESET_ASCQ); if (debug) cp = "bus reset"; break; case SDEBUG_UA_MODE_CHANGED: mk_sense_buffer(SCpnt, UNIT_ATTENTION, UA_CHANGED_ASC, MODE_CHANGED_ASCQ); if (debug) cp = "mode parameters changed"; break; default: pr_warn("%s: unexpected unit attention code=%d\n", __func__, k); if (debug) cp = "unknown"; break; } clear_bit(k, devip->uas_bm); if (debug) sdev_printk(KERN_INFO, SCpnt->device, "%s reports: Unit attention: %s\n", my_name, cp); return check_condition_result; } if ((UAS_TUR == uas_only) && devip->stopped) { mk_sense_buffer(SCpnt, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2); if (debug) sdev_printk(KERN_INFO, SCpnt->device, "%s reports: Not ready: %s\n", my_name, "initializing command required"); 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 act_len; struct scsi_data_buffer *sdb = scsi_in(scp); if (!sdb->length) return 0; if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE)) return (DID_ERROR << 16); act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents, arr, arr_len); sdb->resid = scsi_bufflen(scp) - 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 arr_len) { if (!scsi_bufflen(scp)) return 0; if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE)) return -1; return scsi_sg_copy_to_buffer(scp, arr, arr_len); } static const char * inq_vendor_id = "Linux "; static const char * inq_product_id = "scsi_debug "; static const char *inq_product_rev = "0184"; /* version less '.' */ /* Device identification VPD page. Returns number of bytes placed in arr */ 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, }; /* Software interface identification VPD page */ static int inquiry_evpd_84(unsigned char * arr) { memcpy(arr, vpd84_data, sizeof(vpd84_data)); return sizeof(vpd84_data); } /* Management network addresses VPD page */ 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, }; /* ATA Information VPD page */ 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, 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, }; /* Block limits VPD page (SBC-3) */ static int inquiry_evpd_b0(unsigned char * arr) { unsigned int gran; memcpy(arr, vpdb0_data, sizeof(vpdb0_data)); /* Optimal transfer length granularity */ gran = 1 << scsi_debug_physblk_exp; arr[2] = (gran >> 8) & 0xff; arr[3] = gran & 0xff; /* Maximum Transfer Length */ 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; } /* Optimal Transfer Length */ put_unaligned_be32(scsi_debug_opt_blks, &arr[8]); if (scsi_debug_lbpu) { /* Maximum Unmap LBA Count */ put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]); /* Maximum Unmap Block Descriptor Count */ put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]); } /* Unmap Granularity Alignment */ if (scsi_debug_unmap_alignment) { put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]); arr[28] |= 0x80; /* UGAVALID */ } /* Optimal Unmap Granularity */ put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]); /* Maximum WRITE SAME Length */ put_unaligned_be64(scsi_debug_write_same_length, &arr[32]); return 0x3c; /* Mandatory page length for Logical Block Provisioning */ return sizeof(vpdb0_data); } /* Block device characteristics VPD page (SBC-3) */ static int inquiry_evpd_b1(unsigned char *arr) { memset(arr, 0, 0x3c); arr[0] = 0; arr[1] = 1; /* non rotating medium (e.g. solid state) */ arr[2] = 0; arr[3] = 5; /* less than 1.8" */ return 0x3c; } /* Logical block provisioning VPD page (SBC-3) */ static int inquiry_evpd_b2(unsigned char *arr) { memset(arr, 0, 0x4); arr[0] = 0; /* threshold exponent */ if (scsi_debug_lbpu) arr[1] = 1 << 7; if (scsi_debug_lbpws) arr[1] |= 1 << 6; if (scsi_debug_lbpws10) arr[1] |= 1 << 5; if (scsi_debug_lbprz) arr[1] |= 1 << 2; return 0x4; } #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 = 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(scp, 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[n++] = 0xb1; /* Block characteristics (SBC) */ if (scsi_debug_lbp()) /* Logical Block Prov. (SBC) */ arr[n++] = 0xb2; 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 */ if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) arr[4] = 0x4; /* SPT: GRD_CHK:1 */ else if (scsi_debug_dif) arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */ else 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 if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */ arr[1] = cmd[2]; /*sanity */ arr[3] = inquiry_evpd_b1(&arr[4]); } else if (0xb2 == cmd[2]) { /* Logical Block Prov. (SBC) */ arr[1] = cmd[2]; /*sanity */ arr[3] = inquiry_evpd_b2(&arr[4]); } else { /* Illegal request, invalid field in cdb */ mk_sense_buffer(scp, 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] = scsi_debug_removable ? 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[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */ 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 = scp->cmnd; unsigned char arr[SCSI_SENSE_BUFFERSIZE]; int want_dsense; int len = 18; memset(arr, 0, sizeof(arr)); want_dsense = !!(cmd[1] & 1) || scsi_debug_dsense; sbuff = scp->sense_buffer; 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, SCSI_SENSE_BUFFERSIZE); 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(scp, 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 = scp->cmnd; int power_cond, errsts, start; errsts = check_readiness(scp, UAS_ONLY, devip); if (errsts) return errsts; power_cond = (cmd[4] & 0xf0) >> 4; if (power_cond) { mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } start = cmd[4] & 1; if (start == devip->stopped) devip->stopped = !start; return 0; } static sector_t get_sdebug_capacity(void) { if (scsi_debug_virtual_gb > 0) return (sector_t)scsi_debug_virtual_gb * (1073741824 / scsi_debug_sector_size); else return sdebug_store_sectors; } #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; errsts = check_readiness(scp, UAS_ONLY, devip); if (errsts) return errsts; /* following just in case virtual_gb changed */ sdebug_capacity = get_sdebug_capacity(); 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] = (scsi_debug_sector_size >> 8) & 0xff; arr[7] = scsi_debug_sector_size & 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 = scp->cmnd; unsigned char arr[SDEBUG_READCAP16_ARR_SZ]; unsigned long long capac; int errsts, k, alloc_len; errsts = check_readiness(scp, UAS_ONLY, devip); if (errsts) return errsts; alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8) + cmd[13]); /* following just in case virtual_gb changed */ sdebug_capacity = get_sdebug_capacity(); 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] = (scsi_debug_sector_size >> 24) & 0xff; arr[9] = (scsi_debug_sector_size >> 16) & 0xff; arr[10] = (scsi_debug_sector_size >> 8) & 0xff; arr[11] = scsi_debug_sector_size & 0xff; arr[13] = scsi_debug_physblk_exp & 0xf; arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f; if (scsi_debug_lbp()) { arr[14] |= 0x80; /* LBPME */ if (scsi_debug_lbprz) arr[14] |= 0x40; /* LBPRZ */ } arr[15] = scsi_debug_lowest_aligned & 0xff; if (scsi_debug_dif) { arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */ arr[12] |= 1; /* PROT_EN */ } 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 = 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; } /* <> */ 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] = (scsi_debug_sector_size >> 8) & 0xff; p[13] = scsi_debug_sector_size & 0xff; if (scsi_debug_removable) 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 ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0}; if (SCSI_DEBUG_OPT_N_WCE & scsi_debug_opts) caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */ memcpy(p, caching_pg, sizeof(caching_pg)); if (1 == pcontrol) memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg)); else if (2 == pcontrol) memcpy(p, d_caching_pg, sizeof(d_caching_pg)); 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; if (scsi_debug_ato) ctrl_m_pg[5] |= 0x80; /* ATO=1 */ 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 = scp->cmnd; errsts = check_readiness(scp, UAS_ONLY, devip); if (errsts) 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(scp, 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) && (!sdebug_capacity)) sdebug_capacity = get_sdebug_capacity(); 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] = (scsi_debug_sector_size >> 8) & 0xff; ap[7] = scsi_debug_sector_size & 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] = (scsi_debug_sector_size >> 24) & 0xff; ap[13] = (scsi_debug_sector_size >> 16) & 0xff; ap[14] = (scsi_debug_sector_size >> 8) & 0xff; ap[15] = scsi_debug_sector_size & 0xff; offset += bd_len; ap = arr + offset; } if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) { /* TODO: Control Extension page */ mk_sense_buffer(scp, 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(scp, 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(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } offset += len; break; default: mk_sense_buffer(scp, 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 = scp->cmnd; errsts = check_readiness(scp, UAS_ONLY, devip); if (errsts) 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(scp, 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)) sdev_printk(KERN_INFO, scp->device, "%s: cdb indicated=%d, IO sent=%d bytes\n", __func__, 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(scp, 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(scp, 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(scp, ILLEGAL_REQUEST, PARAMETER_LIST_LENGTH_ERR, 0); return check_condition_result; } switch (mpage) { case 0x8: /* Caching Mode page */ if (caching_pg[1] == arr[off + 1]) { memcpy(caching_pg + 2, arr + off + 2, sizeof(caching_pg) - 2); goto set_mode_changed_ua; } break; 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); goto set_mode_changed_ua; } 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); goto set_mode_changed_ua; } break; default: break; } mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_PARAM_LIST, 0); return check_condition_result; set_mode_changed_ua: set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm); return 0; } 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 = scp->cmnd; errsts = check_readiness(scp, UAS_ONLY, devip); if (errsts) return errsts; memset(arr, 0, sizeof(arr)); ppc = cmd[1] & 0x2; sp = cmd[1] & 0x1; if (ppc || sp) { mk_sense_buffer(scp, 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(scp, 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(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } } else { mk_sense_buffer(scp, 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 check_device_access_params(struct scsi_cmnd *scp, unsigned long long lba, unsigned int num) { if (lba + num > sdebug_capacity) { mk_sense_buffer(scp, 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(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } return 0; } /* Returns number of bytes copied or -1 if error. */ static int do_device_access(struct scsi_cmnd *scmd, unsigned long long lba, unsigned int num, int write) { int ret; unsigned long long block, rest = 0; struct scsi_data_buffer *sdb; enum dma_data_direction dir; size_t (*func)(struct scatterlist *, unsigned int, void *, size_t, off_t); if (write) { sdb = scsi_out(scmd); dir = DMA_TO_DEVICE; func = sg_pcopy_to_buffer; } else { sdb = scsi_in(scmd); dir = DMA_FROM_DEVICE; func = sg_pcopy_from_buffer; } if (!sdb->length) return 0; if (!(scsi_bidi_cmnd(scmd) || scmd->sc_data_direction == dir)) return -1; block = do_div(lba, sdebug_store_sectors); if (block + num > sdebug_store_sectors) rest = block + num - sdebug_store_sectors; ret = func(sdb->table.sgl, sdb->table.nents, fake_storep + (block * scsi_debug_sector_size), (num - rest) * scsi_debug_sector_size, 0); if (ret != (num - rest) * scsi_debug_sector_size) return ret; if (rest) { ret += func(sdb->table.sgl, sdb->table.nents, fake_storep, rest * scsi_debug_sector_size, (num - rest) * scsi_debug_sector_size); } return ret; } static __be16 dif_compute_csum(const void *buf, int len) { __be16 csum; if (scsi_debug_guard) csum = (__force __be16)ip_compute_csum(buf, len); else csum = cpu_to_be16(crc_t10dif(buf, len)); return csum; } static int dif_verify(struct sd_dif_tuple *sdt, const void *data, sector_t sector, u32 ei_lba) { __be16 csum = dif_compute_csum(data, scsi_debug_sector_size); if (sdt->guard_tag != csum) { pr_err("%s: GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n", __func__, (unsigned long)sector, be16_to_cpu(sdt->guard_tag), be16_to_cpu(csum)); return 0x01; } if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION && be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) { pr_err("%s: REF check failed on sector %lu\n", __func__, (unsigned long)sector); return 0x03; } if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && be32_to_cpu(sdt->ref_tag) != ei_lba) { pr_err("%s: REF check failed on sector %lu\n", __func__, (unsigned long)sector); return 0x03; } return 0; } static void dif_copy_prot(struct scsi_cmnd *SCpnt, sector_t sector, unsigned int sectors, bool read) { size_t resid; void *paddr; const void *dif_store_end = dif_storep + sdebug_store_sectors; struct sg_mapping_iter miter; /* Bytes of protection data to copy into sgl */ resid = sectors * sizeof(*dif_storep); sg_miter_start(&miter, scsi_prot_sglist(SCpnt), scsi_prot_sg_count(SCpnt), SG_MITER_ATOMIC | (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG)); while (sg_miter_next(&miter) && resid > 0) { size_t len = min(miter.length, resid); void *start = dif_store(sector); size_t rest = 0; if (dif_store_end < start + len) rest = start + len - dif_store_end; paddr = miter.addr; if (read) memcpy(paddr, start, len - rest); else memcpy(start, paddr, len - rest); if (rest) { if (read) memcpy(paddr + len - rest, dif_storep, rest); else memcpy(dif_storep, paddr + len - rest, rest); } sector += len / sizeof(*dif_storep); resid -= len; } sg_miter_stop(&miter); } static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec, unsigned int sectors, u32 ei_lba) { unsigned int i; struct sd_dif_tuple *sdt; sector_t sector; for (i = 0; i < sectors; i++, ei_lba++) { int ret; sector = start_sec + i; sdt = dif_store(sector); if (sdt->app_tag == cpu_to_be16(0xffff)) continue; ret = dif_verify(sdt, fake_store(sector), sector, ei_lba); if (ret) { dif_errors++; return ret; } } dif_copy_prot(SCpnt, start_sec, sectors, true); dix_reads++; return 0; } static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba, unsigned int num, u32 ei_lba) { unsigned long iflags; int ret; ret = check_device_access_params(SCpnt, lba, num); if (ret) return ret; if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) && (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) && ((lba + num) > OPT_MEDIUM_ERR_ADDR)) { /* claim unrecoverable read error */ mk_sense_buffer(SCpnt, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0); /* set info field and valid bit for fixed descriptor */ if (0x70 == (SCpnt->sense_buffer[0] & 0x7f)) { SCpnt->sense_buffer[0] |= 0x80; /* Valid bit */ ret = (lba < OPT_MEDIUM_ERR_ADDR) ? OPT_MEDIUM_ERR_ADDR : (int)lba; SCpnt->sense_buffer[3] = (ret >> 24) & 0xff; SCpnt->sense_buffer[4] = (ret >> 16) & 0xff; SCpnt->sense_buffer[5] = (ret >> 8) & 0xff; SCpnt->sense_buffer[6] = ret & 0xff; } scsi_set_resid(SCpnt, scsi_bufflen(SCpnt)); return check_condition_result; } read_lock_irqsave(&atomic_rw, iflags); /* DIX + T10 DIF */ if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) { int prot_ret = prot_verify_read(SCpnt, lba, num, ei_lba); if (prot_ret) { read_unlock_irqrestore(&atomic_rw, iflags); mk_sense_buffer(SCpnt, ABORTED_COMMAND, 0x10, prot_ret); return illegal_condition_result; } } ret = do_device_access(SCpnt, lba, num, 0); read_unlock_irqrestore(&atomic_rw, iflags); if (ret == -1) return DID_ERROR << 16; scsi_in(SCpnt)->resid = scsi_bufflen(SCpnt) - ret; return 0; } void dump_sector(unsigned char *buf, int len) { int i, j, n; pr_err(">>> Sector Dump <<<\n"); for (i = 0 ; i < len ; i += 16) { char b[128]; for (j = 0, n = 0; j < 16; j++) { unsigned char c = buf[i+j]; if (c >= 0x20 && c < 0x7e) n += scnprintf(b + n, sizeof(b) - n, " %c ", buf[i+j]); else n += scnprintf(b + n, sizeof(b) - n, "%02x ", buf[i+j]); } pr_err("%04d: %s\n", i, b); } } static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec, unsigned int sectors, u32 ei_lba) { int ret; struct sd_dif_tuple *sdt; void *daddr; sector_t sector = start_sec; int ppage_offset; int dpage_offset; struct sg_mapping_iter diter; struct sg_mapping_iter piter; BUG_ON(scsi_sg_count(SCpnt) == 0); BUG_ON(scsi_prot_sg_count(SCpnt) == 0); sg_miter_start(&piter, scsi_prot_sglist(SCpnt), scsi_prot_sg_count(SCpnt), SG_MITER_ATOMIC | SG_MITER_FROM_SG); sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt), SG_MITER_ATOMIC | SG_MITER_FROM_SG); /* For each protection page */ while (sg_miter_next(&piter)) { dpage_offset = 0; if (WARN_ON(!sg_miter_next(&diter))) { ret = 0x01; goto out; } for (ppage_offset = 0; ppage_offset < piter.length; ppage_offset += sizeof(struct sd_dif_tuple)) { /* If we're at the end of the current * data page advance to the next one */ if (dpage_offset >= diter.length) { if (WARN_ON(!sg_miter_next(&diter))) { ret = 0x01; goto out; } dpage_offset = 0; } sdt = piter.addr + ppage_offset; daddr = diter.addr + dpage_offset; ret = dif_verify(sdt, daddr, sector, ei_lba); if (ret) { dump_sector(daddr, scsi_debug_sector_size); goto out; } sector++; ei_lba++; dpage_offset += scsi_debug_sector_size; } diter.consumed = dpage_offset; sg_miter_stop(&diter); } sg_miter_stop(&piter); dif_copy_prot(SCpnt, start_sec, sectors, false); dix_writes++; return 0; out: dif_errors++; sg_miter_stop(&diter); sg_miter_stop(&piter); return ret; } static unsigned long lba_to_map_index(sector_t lba) { if (scsi_debug_unmap_alignment) { lba += scsi_debug_unmap_granularity - scsi_debug_unmap_alignment; } do_div(lba, scsi_debug_unmap_granularity); return lba; } static sector_t map_index_to_lba(unsigned long index) { sector_t lba = index * scsi_debug_unmap_granularity; if (scsi_debug_unmap_alignment) { lba -= scsi_debug_unmap_granularity - scsi_debug_unmap_alignment; } return lba; } static unsigned int map_state(sector_t lba, unsigned int *num) { sector_t end; unsigned int mapped; unsigned long index; unsigned long next; index = lba_to_map_index(lba); mapped = test_bit(index, map_storep); if (mapped) next = find_next_zero_bit(map_storep, map_size, index); else next = find_next_bit(map_storep, map_size, index); end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next)); *num = end - lba; return mapped; } static void map_region(sector_t lba, unsigned int len) { sector_t end = lba + len; while (lba < end) { unsigned long index = lba_to_map_index(lba); if (index < map_size) set_bit(index, map_storep); lba = map_index_to_lba(index + 1); } } static void unmap_region(sector_t lba, unsigned int len) { sector_t end = lba + len; while (lba < end) { unsigned long index = lba_to_map_index(lba); if (lba == map_index_to_lba(index) && lba + scsi_debug_unmap_granularity <= end && index < map_size) { clear_bit(index, map_storep); if (scsi_debug_lbprz) { memset(fake_storep + lba * scsi_debug_sector_size, 0, scsi_debug_sector_size * scsi_debug_unmap_granularity); } if (dif_storep) { memset(dif_storep + lba, 0xff, sizeof(*dif_storep) * scsi_debug_unmap_granularity); } } lba = map_index_to_lba(index + 1); } } static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba, unsigned int num, u32 ei_lba) { unsigned long iflags; int ret; ret = check_device_access_params(SCpnt, lba, num); if (ret) return ret; write_lock_irqsave(&atomic_rw, iflags); /* DIX + T10 DIF */ if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) { int prot_ret = prot_verify_write(SCpnt, lba, num, ei_lba); if (prot_ret) { write_unlock_irqrestore(&atomic_rw, iflags); mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, 0x10, prot_ret); return illegal_condition_result; } } ret = do_device_access(SCpnt, lba, num, 1); if (scsi_debug_lbp()) map_region(lba, num); write_unlock_irqrestore(&atomic_rw, iflags); if (-1 == ret) return (DID_ERROR << 16); else if ((ret < (num * scsi_debug_sector_size)) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) sdev_printk(KERN_INFO, SCpnt->device, "%s: write: cdb indicated=%u, IO sent=%d bytes\n", my_name, num * scsi_debug_sector_size, ret); return 0; } static int resp_write_same(struct scsi_cmnd *scmd, unsigned long long lba, unsigned int num, u32 ei_lba, unsigned int unmap) { unsigned long iflags; unsigned long long i; int ret; ret = check_device_access_params(scmd, lba, num); if (ret) return ret; if (num > scsi_debug_write_same_length) { mk_sense_buffer(scmd, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } write_lock_irqsave(&atomic_rw, iflags); if (unmap && scsi_debug_lbp()) { unmap_region(lba, num); goto out; } /* Else fetch one logical block */ ret = fetch_to_dev_buffer(scmd, fake_storep + (lba * scsi_debug_sector_size), scsi_debug_sector_size); if (-1 == ret) { write_unlock_irqrestore(&atomic_rw, iflags); return (DID_ERROR << 16); } else if ((ret < (num * scsi_debug_sector_size)) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) sdev_printk(KERN_INFO, scmd->device, "%s: %s: cdb indicated=%u, IO sent=%d bytes\n", my_name, "write same", num * scsi_debug_sector_size, ret); /* Copy first sector to remaining blocks */ for (i = 1 ; i < num ; i++) memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size), fake_storep + (lba * scsi_debug_sector_size), scsi_debug_sector_size); if (scsi_debug_lbp()) map_region(lba, num); out: write_unlock_irqrestore(&atomic_rw, iflags); return 0; } struct unmap_block_desc { __be64 lba; __be32 blocks; __be32 __reserved; }; static int resp_unmap(struct scsi_cmnd * scmd, struct sdebug_dev_info * devip) { unsigned char *buf; struct unmap_block_desc *desc; unsigned int i, payload_len, descriptors; int ret; unsigned long iflags; ret = check_readiness(scmd, UAS_ONLY, devip); if (ret) return ret; payload_len = get_unaligned_be16(&scmd->cmnd[7]); BUG_ON(scsi_bufflen(scmd) != payload_len); descriptors = (payload_len - 8) / 16; buf = kmalloc(scsi_bufflen(scmd), GFP_ATOMIC); if (!buf) return check_condition_result; scsi_sg_copy_to_buffer(scmd, buf, scsi_bufflen(scmd)); BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2); BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16); desc = (void *)&buf[8]; write_lock_irqsave(&atomic_rw, iflags); for (i = 0 ; i < descriptors ; i++) { unsigned long long lba = get_unaligned_be64(&desc[i].lba); unsigned int num = get_unaligned_be32(&desc[i].blocks); ret = check_device_access_params(scmd, lba, num); if (ret) goto out; unmap_region(lba, num); } ret = 0; out: write_unlock_irqrestore(&atomic_rw, iflags); kfree(buf); return ret; } #define SDEBUG_GET_LBA_STATUS_LEN 32 static int resp_get_lba_status(struct scsi_cmnd * scmd, struct sdebug_dev_info * devip) { unsigned long long lba; unsigned int alloc_len, mapped, num; unsigned char arr[SDEBUG_GET_LBA_STATUS_LEN]; int ret; ret = check_readiness(scmd, UAS_ONLY, devip); if (ret) return ret; lba = get_unaligned_be64(&scmd->cmnd[2]); alloc_len = get_unaligned_be32(&scmd->cmnd[10]); if (alloc_len < 24) return 0; ret = check_device_access_params(scmd, lba, 1); if (ret) return ret; mapped = map_state(lba, &num); memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN); put_unaligned_be32(20, &arr[0]); /* Parameter Data Length */ put_unaligned_be64(lba, &arr[8]); /* LBA */ put_unaligned_be32(num, &arr[16]); /* Number of blocks */ arr[20] = !mapped; /* mapped = 0, unmapped = 1 */ return fill_from_dev_buffer(scmd, arr, SDEBUG_GET_LBA_STATUS_LEN); } #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; u64 wlun, lun; unsigned char *cmd = 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(scp, 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)); } static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba, unsigned int num, struct sdebug_dev_info *devip) { int j; unsigned char *kaddr, *buf; unsigned int offset; struct scsi_data_buffer *sdb = scsi_in(scp); struct sg_mapping_iter miter; /* better not to use temporary buffer. */ buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC); if (!buf) { mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_COMMUNICATION_FAILURE, 0); return check_condition_result; } scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp)); offset = 0; sg_miter_start(&miter, sdb->table.sgl, sdb->table.nents, SG_MITER_ATOMIC | SG_MITER_TO_SG); while (sg_miter_next(&miter)) { kaddr = miter.addr; for (j = 0; j < miter.length; j++) *(kaddr + j) ^= *(buf + offset + j); offset += miter.length; } sg_miter_stop(&miter); kfree(buf); return 0; } /* When timer or tasklet goes off this function is called. */ static void sdebug_q_cmd_complete(unsigned long indx) { int qa_indx; int retiring = 0; unsigned long iflags; struct sdebug_queued_cmd *sqcp; struct scsi_cmnd *scp; struct sdebug_dev_info *devip; atomic_inc(&sdebug_completions); qa_indx = indx; if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) { pr_err("%s: wild qa_indx=%d\n", __func__, qa_indx); return; } spin_lock_irqsave(&queued_arr_lock, iflags); sqcp = &queued_arr[qa_indx]; scp = sqcp->a_cmnd; if (NULL == scp) { spin_unlock_irqrestore(&queued_arr_lock, iflags); pr_err("%s: scp is NULL\n", __func__); return; } devip = (struct sdebug_dev_info *)scp->device->hostdata; if (devip) atomic_dec(&devip->num_in_q); else pr_err("%s: devip=NULL\n", __func__); if (atomic_read(&retired_max_queue) > 0) retiring = 1; sqcp->a_cmnd = NULL; if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) { spin_unlock_irqrestore(&queued_arr_lock, iflags); pr_err("%s: Unexpected completion\n", __func__); return; } if (unlikely(retiring)) { /* user has reduced max_queue */ int k, retval; retval = atomic_read(&retired_max_queue); if (qa_indx >= retval) { spin_unlock_irqrestore(&queued_arr_lock, iflags); pr_err("%s: index %d too large\n", __func__, retval); return; } k = find_last_bit(queued_in_use_bm, retval); if ((k < scsi_debug_max_queue) || (k == retval)) atomic_set(&retired_max_queue, 0); else atomic_set(&retired_max_queue, k + 1); } spin_unlock_irqrestore(&queued_arr_lock, iflags); scp->scsi_done(scp); /* callback to mid level */ } /* When high resolution timer goes off this function is called. */ static enum hrtimer_restart sdebug_q_cmd_hrt_complete(struct hrtimer *timer) { int qa_indx; int retiring = 0; unsigned long iflags; struct sdebug_hrtimer *sd_hrtp = (struct sdebug_hrtimer *)timer; struct sdebug_queued_cmd *sqcp; struct scsi_cmnd *scp; struct sdebug_dev_info *devip; atomic_inc(&sdebug_completions); qa_indx = sd_hrtp->qa_indx; if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) { pr_err("%s: wild qa_indx=%d\n", __func__, qa_indx); goto the_end; } spin_lock_irqsave(&queued_arr_lock, iflags); sqcp = &queued_arr[qa_indx]; scp = sqcp->a_cmnd; if (NULL == scp) { spin_unlock_irqrestore(&queued_arr_lock, iflags); pr_err("%s: scp is NULL\n", __func__); goto the_end; } devip = (struct sdebug_dev_info *)scp->device->hostdata; if (devip) atomic_dec(&devip->num_in_q); else pr_err("%s: devip=NULL\n", __func__); if (atomic_read(&retired_max_queue) > 0) retiring = 1; sqcp->a_cmnd = NULL; if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) { spin_unlock_irqrestore(&queued_arr_lock, iflags); pr_err("%s: Unexpected completion\n", __func__); goto the_end; } if (unlikely(retiring)) { /* user has reduced max_queue */ int k, retval; retval = atomic_read(&retired_max_queue); if (qa_indx >= retval) { spin_unlock_irqrestore(&queued_arr_lock, iflags); pr_err("%s: index %d too large\n", __func__, retval); goto the_end; } k = find_last_bit(queued_in_use_bm, retval); if ((k < scsi_debug_max_queue) || (k == retval)) atomic_set(&retired_max_queue, 0); else atomic_set(&retired_max_queue, k + 1); } spin_unlock_irqrestore(&queued_arr_lock, iflags); scp->scsi_done(scp); /* callback to mid level */ the_end: return HRTIMER_NORESTART; } static struct sdebug_dev_info * sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags) { struct sdebug_dev_info *devip; devip = kzalloc(sizeof(*devip), flags); if (devip) { devip->sdbg_host = sdbg_host; list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list); } return devip; } 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 **)shost_priv(sdev->host); if (!sdbg_host) { pr_err("%s: Host info NULL\n", __func__); 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 (!open_devip) { /* try and make a new one */ open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC); if (!open_devip) { printk(KERN_ERR "%s: out of memory at line %d\n", __func__, __LINE__); return NULL; } } open_devip->channel = sdev->channel; open_devip->target = sdev->id; open_devip->lun = sdev->lun; open_devip->sdbg_host = sdbg_host; atomic_set(&open_devip->num_in_q, 0); set_bit(SDEBUG_UA_POR, open_devip->uas_bm); open_devip->used = 1; if (sdev->lun == SAM2_WLUN_REPORT_LUNS) open_devip->wlun = SAM2_WLUN_REPORT_LUNS & 0xff; return open_devip; } 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 %llu>\n", sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue); 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 %llu>\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; sdp->tagged_supported = 1; if (sdp->host->cmd_per_lun) scsi_adjust_queue_depth(sdp, DEF_TAGGED_QUEUING, DEF_CMD_PER_LUN); blk_queue_max_segment_size(sdp->request_queue, -1U); if (scsi_debug_no_uld) sdp->no_uld_attach = 1; 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 %llu>\n", sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); if (devip) { /* make this slot available for re-use */ devip->used = 0; sdp->hostdata = NULL; } } /* Returns 1 if cmnd found (deletes its timer or tasklet), else returns 0 */ static int stop_queued_cmnd(struct scsi_cmnd *cmnd) { unsigned long iflags; int k, qmax, r_qmax; struct sdebug_queued_cmd *sqcp; struct sdebug_dev_info *devip; spin_lock_irqsave(&queued_arr_lock, iflags); qmax = scsi_debug_max_queue; r_qmax = atomic_read(&retired_max_queue); if (r_qmax > qmax) qmax = r_qmax; for (k = 0; k < qmax; ++k) { if (test_bit(k, queued_in_use_bm)) { sqcp = &queued_arr[k]; if (cmnd == sqcp->a_cmnd) { if (scsi_debug_ndelay > 0) { if (sqcp->sd_hrtp) hrtimer_cancel( &sqcp->sd_hrtp->hrt); } else if (scsi_debug_delay > 0) { if (sqcp->cmnd_timerp) del_timer_sync( sqcp->cmnd_timerp); } else if (scsi_debug_delay < 0) { if (sqcp->tletp) tasklet_kill(sqcp->tletp); } __clear_bit(k, queued_in_use_bm); devip = (struct sdebug_dev_info *) cmnd->device->hostdata; if (devip) atomic_dec(&devip->num_in_q); sqcp->a_cmnd = NULL; break; } } } spin_unlock_irqrestore(&queued_arr_lock, iflags); return (k < qmax) ? 1 : 0; } /* Deletes (stops) timers or tasklets of all queued commands */ static void stop_all_queued(void) { unsigned long iflags; int k; struct sdebug_queued_cmd *sqcp; struct sdebug_dev_info *devip; spin_lock_irqsave(&queued_arr_lock, iflags); for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) { if (test_bit(k, queued_in_use_bm)) { sqcp = &queued_arr[k]; if (sqcp->a_cmnd) { if (scsi_debug_ndelay > 0) { if (sqcp->sd_hrtp) hrtimer_cancel( &sqcp->sd_hrtp->hrt); } else if (scsi_debug_delay > 0) { if (sqcp->cmnd_timerp) del_timer_sync( sqcp->cmnd_timerp); } else if (scsi_debug_delay < 0) { if (sqcp->tletp) tasklet_kill(sqcp->tletp); } __clear_bit(k, queued_in_use_bm); devip = (struct sdebug_dev_info *) sqcp->a_cmnd->device->hostdata; if (devip) atomic_dec(&devip->num_in_q); sqcp->a_cmnd = NULL; } } } spin_unlock_irqrestore(&queued_arr_lock, iflags); } /* Free queued command memory on heap */ static void free_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]; kfree(sqcp->cmnd_timerp); sqcp->cmnd_timerp = NULL; kfree(sqcp->tletp); sqcp->tletp = NULL; kfree(sqcp->sd_hrtp); sqcp->sd_hrtp = NULL; } spin_unlock_irqrestore(&queued_arr_lock, iflags); } static int scsi_debug_abort(struct scsi_cmnd *SCpnt) { ++num_aborts; if (SCpnt) { if (SCpnt->device && (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)) sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__); stop_queued_cmnd(SCpnt); } return SUCCESS; } static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt) { struct sdebug_dev_info * devip; ++num_dev_resets; if (SCpnt && SCpnt->device) { struct scsi_device *sdp = SCpnt->device; if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts) sdev_printk(KERN_INFO, sdp, "%s\n", __func__); devip = devInfoReg(sdp); if (devip) set_bit(SDEBUG_UA_POR, devip->uas_bm); } return SUCCESS; } static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt) { struct sdebug_host_info *sdbg_host; struct sdebug_dev_info *devip; struct scsi_device *sdp; struct Scsi_Host *hp; int k = 0; ++num_target_resets; if (!SCpnt) goto lie; sdp = SCpnt->device; if (!sdp) goto lie; if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts) sdev_printk(KERN_INFO, sdp, "%s\n", __func__); hp = sdp->host; if (!hp) goto lie; sdbg_host = *(struct sdebug_host_info **)shost_priv(hp); if (sdbg_host) { list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) if (devip->target == sdp->id) { set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); ++k; } } if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts) sdev_printk(KERN_INFO, sdp, "%s: %d device(s) found in target\n", __func__, k); lie: return SUCCESS; } static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt) { struct sdebug_host_info *sdbg_host; struct sdebug_dev_info *devip; struct scsi_device * sdp; struct Scsi_Host * hp; int k = 0; ++num_bus_resets; if (!(SCpnt && SCpnt->device)) goto lie; sdp = SCpnt->device; if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts) sdev_printk(KERN_INFO, sdp, "%s\n", __func__); hp = sdp->host; if (hp) { sdbg_host = *(struct sdebug_host_info **)shost_priv(hp); if (sdbg_host) { list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) { set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); ++k; } } } if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts) sdev_printk(KERN_INFO, sdp, "%s: %d device(s) found in host\n", __func__, k); lie: return SUCCESS; } static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt) { struct sdebug_host_info * sdbg_host; struct sdebug_dev_info *devip; int k = 0; ++num_host_resets; if ((SCpnt->device) && (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)) sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__); spin_lock(&sdebug_host_list_lock); list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) { set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); ++k; } } spin_unlock(&sdebug_host_list_lock); stop_all_queued(); if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts) sdev_printk(KERN_INFO, SCpnt->device, "%s: %d device(s) found\n", __func__, k); return SUCCESS; } static void __init sdebug_build_parts(unsigned char *ramp, unsigned long store_size) { 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) || (store_size < 1048576)) return; if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) { scsi_debug_num_parts = SDEBUG_MAX_PARTS; pr_warn("%s: reducing partitions to %d\n", __func__, 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 = cpu_to_le32(start_sec); pp->nr_sects = cpu_to_le32(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, int scsi_result, int delta_jiff) { unsigned long iflags; int k, num_in_q, tsf, qdepth, inject; struct sdebug_queued_cmd *sqcp = NULL; struct scsi_device *sdp = cmnd->device; if (NULL == cmnd || NULL == devip) { pr_warn("%s: called with NULL cmnd or devip pointer\n", __func__); /* no particularly good error to report back */ return SCSI_MLQUEUE_HOST_BUSY; } if ((scsi_result) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n", __func__, scsi_result); if (delta_jiff == 0) { /* using same thread to call back mid-layer */ cmnd->result = scsi_result; cmnd->scsi_done(cmnd); return 0; } /* deferred response cases */ spin_lock_irqsave(&queued_arr_lock, iflags); num_in_q = atomic_read(&devip->num_in_q); qdepth = cmnd->device->queue_depth; k = find_first_zero_bit(queued_in_use_bm, scsi_debug_max_queue); tsf = 0; inject = 0; if ((qdepth > 0) && (num_in_q >= qdepth)) tsf = 1; else if ((scsi_debug_every_nth != 0) && (SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts)) { if ((num_in_q == (qdepth - 1)) && (atomic_inc_return(&sdebug_a_tsf) >= abs(scsi_debug_every_nth))) { atomic_set(&sdebug_a_tsf, 0); inject = 1; tsf = 1; } } /* if (tsf) simulate device reporting SCSI status of TASK SET FULL. * Might override existing CHECK CONDITION. */ if (tsf) scsi_result = device_qfull_result; if (k >= scsi_debug_max_queue) { if (SCSI_DEBUG_OPT_ALL_TSF & scsi_debug_opts) tsf = 1; spin_unlock_irqrestore(&queued_arr_lock, iflags); if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) sdev_printk(KERN_INFO, sdp, "%s: num_in_q=%d, bypass q, %s%s\n", __func__, num_in_q, (inject ? " " : ""), (tsf ? "status: TASK SET FULL" : "report: host busy")); if (tsf) { /* queued_arr full so respond in same thread */ cmnd->result = scsi_result; cmnd->scsi_done(cmnd); /* As scsi_done() is called "inline" must return 0 */ return 0; } else return SCSI_MLQUEUE_HOST_BUSY; } __set_bit(k, queued_in_use_bm); atomic_inc(&devip->num_in_q); sqcp = &queued_arr[k]; sqcp->a_cmnd = cmnd; cmnd->result = scsi_result; spin_unlock_irqrestore(&queued_arr_lock, iflags); if (delta_jiff > 0) { if (NULL == sqcp->cmnd_timerp) { sqcp->cmnd_timerp = kmalloc(sizeof(struct timer_list), GFP_ATOMIC); if (NULL == sqcp->cmnd_timerp) return SCSI_MLQUEUE_HOST_BUSY; init_timer(sqcp->cmnd_timerp); } sqcp->cmnd_timerp->function = sdebug_q_cmd_complete; sqcp->cmnd_timerp->data = k; sqcp->cmnd_timerp->expires = get_jiffies_64() + delta_jiff; add_timer(sqcp->cmnd_timerp); } else if (scsi_debug_ndelay > 0) { ktime_t kt = ktime_set(0, scsi_debug_ndelay); struct sdebug_hrtimer *sd_hp = sqcp->sd_hrtp; if (NULL == sd_hp) { sd_hp = kmalloc(sizeof(*sd_hp), GFP_ATOMIC); if (NULL == sd_hp) return SCSI_MLQUEUE_HOST_BUSY; sqcp->sd_hrtp = sd_hp; hrtimer_init(&sd_hp->hrt, CLOCK_MONOTONIC, HRTIMER_MODE_REL); sd_hp->hrt.function = sdebug_q_cmd_hrt_complete; sd_hp->qa_indx = k; } hrtimer_start(&sd_hp->hrt, kt, HRTIMER_MODE_REL); } else { /* delay < 0 */ if (NULL == sqcp->tletp) { sqcp->tletp = kmalloc(sizeof(*sqcp->tletp), GFP_ATOMIC); if (NULL == sqcp->tletp) return SCSI_MLQUEUE_HOST_BUSY; tasklet_init(sqcp->tletp, sdebug_q_cmd_complete, k); } if (-1 == delta_jiff) tasklet_hi_schedule(sqcp->tletp); else tasklet_schedule(sqcp->tletp); } if (tsf && (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts)) sdev_printk(KERN_INFO, sdp, "%s: num_in_q=%d +1, %s%s\n", __func__, num_in_q, (inject ? " " : ""), "status: TASK SET FULL"); 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(ato, scsi_debug_ato, int, S_IRUGO); module_param_named(clustering, scsi_debug_clustering, bool, 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(dif, scsi_debug_dif, int, S_IRUGO); module_param_named(dix, scsi_debug_dix, 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(guard, scsi_debug_guard, uint, S_IRUGO); module_param_named(host_lock, scsi_debug_host_lock, bool, S_IRUGO | S_IWUSR); module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO); module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO); module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO); module_param_named(lbprz, scsi_debug_lbprz, int, S_IRUGO); module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO); module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR); module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR); module_param_named(ndelay, scsi_debug_ndelay, int, S_IRUGO | S_IWUSR); module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR); module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO); 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(opt_blks, scsi_debug_opt_blks, int, S_IRUGO); module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR); module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO); module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR); module_param_named(removable, scsi_debug_removable, bool, S_IRUGO | S_IWUSR); module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO); module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO); module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO); module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO); module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO); module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, 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_param_named(write_same_length, scsi_debug_write_same_length, 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(ato, "application tag ownership: 0=disk 1=host (def=1)"); MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)"); MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny"); MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs(def=8)"); MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)"); MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)"); 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(guard, "protection checksum: 0=crc, 1=ip (def=0)"); MODULE_PARM_DESC(host_lock, "use host_lock around all commands (def=0)"); MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)"); MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)"); MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)"); MODULE_PARM_DESC(lbprz, "unmapped blocks return 0 on read (def=1)"); MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)"); MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)"); MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))"); MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)"); MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)"); MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=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(opt_blks, "optimal transfer length in block (def=64)"); MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)"); MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)"); MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])"); MODULE_PARM_DESC(removable, "claim to have removable media (def=0)"); MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])"); MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)"); MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)"); MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)"); MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)"); MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)"); 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)"); MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)"); 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; } /* 'echo > /proc/scsi/scsi_debug/' writes to opts */ static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, int length) { char arr[16]; int opts; 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", &opts)) return -EINVAL; scsi_debug_opts = opts; if (scsi_debug_every_nth != 0) atomic_set(&sdebug_cmnd_count, 0); return length; } /* Output seen with 'cat /proc/scsi/scsi_debug/'. It will be the * same for each scsi_debug host (if more than one). Some of the counters * output are not atomics so might be inaccurate in a busy system. */ static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host) { int f, l; char b[32]; if (scsi_debug_every_nth > 0) snprintf(b, sizeof(b), " (curr:%d)", ((SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) ? atomic_read(&sdebug_a_tsf) : atomic_read(&sdebug_cmnd_count))); else b[0] = '\0'; seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n" "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, " "every_nth=%d%s\n" "delay=%d, ndelay=%d, max_luns=%d, q_completions=%d\n" "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n" "command aborts=%d; RESETs: device=%d, target=%d, bus=%d, " "host=%d\ndix_reads=%d dix_writes=%d dif_errors=%d " "usec_in_jiffy=%lu\n", SCSI_DEBUG_VERSION, scsi_debug_version_date, scsi_debug_num_tgts, scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth, b, scsi_debug_delay, scsi_debug_ndelay, scsi_debug_max_luns, atomic_read(&sdebug_completions), scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per, num_aborts, num_dev_resets, num_target_resets, num_bus_resets, num_host_resets, dix_reads, dix_writes, dif_errors, TICK_NSEC / 1000); f = find_first_bit(queued_in_use_bm, scsi_debug_max_queue); if (f != scsi_debug_max_queue) { l = find_last_bit(queued_in_use_bm, scsi_debug_max_queue); seq_printf(m, " %s BUSY: first,last bits set: %d,%d\n", "queued_in_use_bm", f, l); } return 0; } static ssize_t delay_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay); } /* Returns -EBUSY if delay is being changed and commands are queued */ static ssize_t delay_store(struct device_driver *ddp, const char *buf, size_t count) { int delay, res; if ((count > 0) && (1 == sscanf(buf, "%d", &delay))) { res = count; if (scsi_debug_delay != delay) { unsigned long iflags; int k; spin_lock_irqsave(&queued_arr_lock, iflags); k = find_first_bit(queued_in_use_bm, scsi_debug_max_queue); if (k != scsi_debug_max_queue) res = -EBUSY; /* have queued commands */ else { scsi_debug_delay = delay; scsi_debug_ndelay = 0; } spin_unlock_irqrestore(&queued_arr_lock, iflags); } return res; } return -EINVAL; } static DRIVER_ATTR_RW(delay); static ssize_t ndelay_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ndelay); } /* Returns -EBUSY if ndelay is being changed and commands are queued */ /* If > 0 and accepted then scsi_debug_delay is set to DELAY_OVERRIDDEN */ static ssize_t ndelay_store(struct device_driver *ddp, const char *buf, size_t count) { unsigned long iflags; int ndelay, res, k; if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) && (ndelay >= 0) && (ndelay < 1000000000)) { res = count; if (scsi_debug_ndelay != ndelay) { spin_lock_irqsave(&queued_arr_lock, iflags); k = find_first_bit(queued_in_use_bm, scsi_debug_max_queue); if (k != scsi_debug_max_queue) res = -EBUSY; /* have queued commands */ else { scsi_debug_ndelay = ndelay; scsi_debug_delay = ndelay ? DELAY_OVERRIDDEN : DEF_DELAY; } spin_unlock_irqrestore(&queued_arr_lock, iflags); } return res; } return -EINVAL; } static DRIVER_ATTR_RW(ndelay); static ssize_t opts_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts); } static ssize_t 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; atomic_set(&sdebug_cmnd_count, 0); atomic_set(&sdebug_a_tsf, 0); return count; } static DRIVER_ATTR_RW(opts); static ssize_t ptype_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype); } static ssize_t 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; } static DRIVER_ATTR_RW(ptype); static ssize_t dsense_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense); } static ssize_t 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; } static DRIVER_ATTR_RW(dsense); static ssize_t fake_rw_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw); } static ssize_t 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)) { n = (n > 0); scsi_debug_fake_rw = (scsi_debug_fake_rw > 0); if (scsi_debug_fake_rw != n) { if ((0 == n) && (NULL == fake_storep)) { unsigned long sz = (unsigned long)scsi_debug_dev_size_mb * 1048576; fake_storep = vmalloc(sz); if (NULL == fake_storep) { pr_err("%s: out of memory, 9\n", __func__); return -ENOMEM; } memset(fake_storep, 0, sz); } scsi_debug_fake_rw = n; } return count; } return -EINVAL; } static DRIVER_ATTR_RW(fake_rw); static ssize_t 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 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; } static DRIVER_ATTR_RW(no_lun_0); static ssize_t num_tgts_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts); } static ssize_t 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; } static DRIVER_ATTR_RW(num_tgts); static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb); } static DRIVER_ATTR_RO(dev_size_mb); static ssize_t num_parts_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts); } static DRIVER_ATTR_RO(num_parts); static ssize_t every_nth_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth); } static ssize_t 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; atomic_set(&sdebug_cmnd_count, 0); return count; } return -EINVAL; } static DRIVER_ATTR_RW(every_nth); static ssize_t max_luns_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns); } static ssize_t 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; } static DRIVER_ATTR_RW(max_luns); static ssize_t max_queue_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue); } /* N.B. max_queue can be changed while there are queued commands. In flight * commands beyond the new max_queue will be completed. */ static ssize_t max_queue_store(struct device_driver *ddp, const char *buf, size_t count) { unsigned long iflags; int n, k; if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) && (n <= SCSI_DEBUG_CANQUEUE)) { spin_lock_irqsave(&queued_arr_lock, iflags); k = find_last_bit(queued_in_use_bm, SCSI_DEBUG_CANQUEUE); scsi_debug_max_queue = n; if (SCSI_DEBUG_CANQUEUE == k) atomic_set(&retired_max_queue, 0); else if (k >= n) atomic_set(&retired_max_queue, k + 1); else atomic_set(&retired_max_queue, 0); spin_unlock_irqrestore(&queued_arr_lock, iflags); return count; } return -EINVAL; } static DRIVER_ATTR_RW(max_queue); static ssize_t no_uld_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld); } static DRIVER_ATTR_RO(no_uld); static ssize_t scsi_level_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level); } static DRIVER_ATTR_RO(scsi_level); static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb); } static ssize_t 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; sdebug_capacity = get_sdebug_capacity(); return count; } return -EINVAL; } static DRIVER_ATTR_RW(virtual_gb); static ssize_t add_host_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host); } static ssize_t add_host_store(struct device_driver *ddp, const char *buf, size_t count) { int delta_hosts; if (sscanf(buf, "%d", &delta_hosts) != 1) return -EINVAL; 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; } static DRIVER_ATTR_RW(add_host); static ssize_t 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 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; } static DRIVER_ATTR_RW(vpd_use_hostno); static ssize_t sector_size_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size); } static DRIVER_ATTR_RO(sector_size); static ssize_t dix_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix); } static DRIVER_ATTR_RO(dix); static ssize_t dif_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif); } static DRIVER_ATTR_RO(dif); static ssize_t guard_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_guard); } static DRIVER_ATTR_RO(guard); static ssize_t ato_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato); } static DRIVER_ATTR_RO(ato); static ssize_t map_show(struct device_driver *ddp, char *buf) { ssize_t count; if (!scsi_debug_lbp()) return scnprintf(buf, PAGE_SIZE, "0-%u\n", sdebug_store_sectors); count = bitmap_scnlistprintf(buf, PAGE_SIZE, map_storep, map_size); buf[count++] = '\n'; buf[count++] = 0; return count; } static DRIVER_ATTR_RO(map); static ssize_t removable_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_removable ? 1 : 0); } static ssize_t removable_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_removable = (n > 0); return count; } return -EINVAL; } static DRIVER_ATTR_RW(removable); static ssize_t host_lock_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", !!scsi_debug_host_lock); } /* Returns -EBUSY if host_lock is being changed and commands are queued */ static ssize_t host_lock_store(struct device_driver *ddp, const char *buf, size_t count) { int n, res; if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { bool new_host_lock = (n > 0); res = count; if (new_host_lock != scsi_debug_host_lock) { unsigned long iflags; int k; spin_lock_irqsave(&queued_arr_lock, iflags); k = find_first_bit(queued_in_use_bm, scsi_debug_max_queue); if (k != scsi_debug_max_queue) res = -EBUSY; /* have queued commands */ else scsi_debug_host_lock = new_host_lock; spin_unlock_irqrestore(&queued_arr_lock, iflags); } return res; } return -EINVAL; } static DRIVER_ATTR_RW(host_lock); /* Note: The following array 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 struct attribute *sdebug_drv_attrs[] = { &driver_attr_delay.attr, &driver_attr_opts.attr, &driver_attr_ptype.attr, &driver_attr_dsense.attr, &driver_attr_fake_rw.attr, &driver_attr_no_lun_0.attr, &driver_attr_num_tgts.attr, &driver_attr_dev_size_mb.attr, &driver_attr_num_parts.attr, &driver_attr_every_nth.attr, &driver_attr_max_luns.attr, &driver_attr_max_queue.attr, &driver_attr_no_uld.attr, &driver_attr_scsi_level.attr, &driver_attr_virtual_gb.attr, &driver_attr_add_host.attr, &driver_attr_vpd_use_hostno.attr, &driver_attr_sector_size.attr, &driver_attr_dix.attr, &driver_attr_dif.attr, &driver_attr_guard.attr, &driver_attr_ato.attr, &driver_attr_map.attr, &driver_attr_removable.attr, &driver_attr_host_lock.attr, &driver_attr_ndelay.attr, NULL, }; ATTRIBUTE_GROUPS(sdebug_drv); static struct device *pseudo_primary; static int __init scsi_debug_init(void) { unsigned long sz; int host_to_add; int k; int ret; atomic_set(&sdebug_cmnd_count, 0); atomic_set(&sdebug_completions, 0); atomic_set(&retired_max_queue, 0); if (scsi_debug_ndelay >= 1000000000) { pr_warn("%s: ndelay must be less than 1 second, ignored\n", __func__); scsi_debug_ndelay = 0; } else if (scsi_debug_ndelay > 0) scsi_debug_delay = DELAY_OVERRIDDEN; switch (scsi_debug_sector_size) { case 512: case 1024: case 2048: case 4096: break; default: pr_err("%s: invalid sector_size %d\n", __func__, scsi_debug_sector_size); return -EINVAL; } switch (scsi_debug_dif) { case SD_DIF_TYPE0_PROTECTION: case SD_DIF_TYPE1_PROTECTION: case SD_DIF_TYPE2_PROTECTION: case SD_DIF_TYPE3_PROTECTION: break; default: pr_err("%s: dif must be 0, 1, 2 or 3\n", __func__); return -EINVAL; } if (scsi_debug_guard > 1) { pr_err("%s: guard must be 0 or 1\n", __func__); return -EINVAL; } if (scsi_debug_ato > 1) { pr_err("%s: ato must be 0 or 1\n", __func__); return -EINVAL; } if (scsi_debug_physblk_exp > 15) { pr_err("%s: invalid physblk_exp %u\n", __func__, scsi_debug_physblk_exp); return -EINVAL; } if (scsi_debug_lowest_aligned > 0x3fff) { pr_err("%s: lowest_aligned too big: %u\n", __func__, scsi_debug_lowest_aligned); return -EINVAL; } if (scsi_debug_dev_size_mb < 1) scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */ sz = (unsigned long)scsi_debug_dev_size_mb * 1048576; sdebug_store_sectors = sz / scsi_debug_sector_size; sdebug_capacity = get_sdebug_capacity(); /* 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); } if (0 == scsi_debug_fake_rw) { fake_storep = vmalloc(sz); if (NULL == fake_storep) { pr_err("%s: out of memory, 1\n", __func__); return -ENOMEM; } memset(fake_storep, 0, sz); if (scsi_debug_num_parts > 0) sdebug_build_parts(fake_storep, sz); } if (scsi_debug_dix) { int dif_size; dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple); dif_storep = vmalloc(dif_size); pr_err("%s: dif_storep %u bytes @ %p\n", __func__, dif_size, dif_storep); if (dif_storep == NULL) { pr_err("%s: out of mem. (DIX)\n", __func__); ret = -ENOMEM; goto free_vm; } memset(dif_storep, 0xff, dif_size); } /* Logical Block Provisioning */ if (scsi_debug_lbp()) { scsi_debug_unmap_max_blocks = clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU); scsi_debug_unmap_max_desc = clamp(scsi_debug_unmap_max_desc, 0U, 256U); scsi_debug_unmap_granularity = clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU); if (scsi_debug_unmap_alignment && scsi_debug_unmap_granularity <= scsi_debug_unmap_alignment) { pr_err("%s: ERR: unmap_granularity <= unmap_alignment\n", __func__); return -EINVAL; } map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1; map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long)); pr_info("%s: %lu provisioning blocks\n", __func__, map_size); if (map_storep == NULL) { pr_err("%s: out of mem. (MAP)\n", __func__); ret = -ENOMEM; goto free_vm; } bitmap_zero(map_storep, map_size); /* Map first 1KB for partition table */ if (scsi_debug_num_parts) map_region(0, 2); } pseudo_primary = root_device_register("pseudo_0"); if (IS_ERR(pseudo_primary)) { pr_warn("%s: root_device_register() error\n", __func__); ret = PTR_ERR(pseudo_primary); goto free_vm; } ret = bus_register(&pseudo_lld_bus); if (ret < 0) { pr_warn("%s: bus_register error: %d\n", __func__, ret); goto dev_unreg; } ret = driver_register(&sdebug_driverfs_driver); if (ret < 0) { pr_warn("%s: driver_register error: %d\n", __func__, ret); goto bus_unreg; } host_to_add = scsi_debug_add_host; scsi_debug_add_host = 0; for (k = 0; k < host_to_add; k++) { if (sdebug_add_adapter()) { pr_err("%s: sdebug_add_adapter failed k=%d\n", __func__, k); break; } } if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) { pr_info("%s: built %d host(s)\n", __func__, scsi_debug_add_host); } return 0; bus_unreg: bus_unregister(&pseudo_lld_bus); dev_unreg: root_device_unregister(pseudo_primary); free_vm: if (map_storep) vfree(map_storep); if (dif_storep) vfree(dif_storep); vfree(fake_storep); return ret; } static void __exit scsi_debug_exit(void) { int k = scsi_debug_add_host; stop_all_queued(); free_all_queued(); for (; k; k--) sdebug_remove_adapter(); driver_unregister(&sdebug_driverfs_driver); bus_unregister(&pseudo_lld_bus); root_device_unregister(pseudo_primary); if (dif_storep) vfree(dif_storep); vfree(fake_storep); } device_initcall(scsi_debug_init); module_exit(scsi_debug_exit); 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, *tmp; sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL); if (NULL == sdbg_host) { printk(KERN_ERR "%s: out of memory at line %d\n", __func__, __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 = sdebug_device_create(sdbg_host, GFP_KERNEL); if (!sdbg_devinfo) { printk(KERN_ERR "%s: out of memory at line %d\n", __func__, __LINE__); error = -ENOMEM; goto clean; } } 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; dev_set_name(&sdbg_host->dev, "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_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list, 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 scsi_debug_queuecommand(struct scsi_cmnd *SCpnt) { unsigned char *cmd = SCpnt->cmnd; int len, k; unsigned int num; unsigned long long lba; u32 ei_lba; int errsts = 0; int target = SCpnt->device->id; struct sdebug_dev_info *devip = NULL; int inj_recovered = 0; int inj_transport = 0; int inj_dif = 0; int inj_dix = 0; int inj_short = 0; int delay_override = 0; int unmap = 0; scsi_set_resid(SCpnt, 0); if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && !(SCSI_DEBUG_OPT_NO_CDB_NOISE & scsi_debug_opts)) { char b[120]; int n; len = SCpnt->cmd_len; if (len > 32) strcpy(b, "too long, over 32 bytes"); else { for (k = 0, n = 0; k < len; ++k) n += scnprintf(b + n, sizeof(b) - n, "%02x ", (unsigned int)cmd[k]); } sdev_printk(KERN_INFO, SCpnt->device, "%s: cmd %s\n", my_name, b); } if ((SCpnt->device->lun >= scsi_debug_max_luns) && (SCpnt->device->lun != SAM2_WLUN_REPORT_LUNS)) return schedule_resp(SCpnt, NULL, DID_NO_CONNECT << 16, 0); devip = devInfoReg(SCpnt->device); if (NULL == devip) return schedule_resp(SCpnt, NULL, DID_NO_CONNECT << 16, 0); if ((scsi_debug_every_nth != 0) && (atomic_inc_return(&sdebug_cmnd_count) >= abs(scsi_debug_every_nth))) { atomic_set(&sdebug_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_MAC_TIMEOUT & scsi_debug_opts && scsi_medium_access_command(SCpnt)) return 0; /* time out reads and writes */ 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 */ else if (SCSI_DEBUG_OPT_DIF_ERR & scsi_debug_opts) inj_dif = 1; /* to reads and writes below */ else if (SCSI_DEBUG_OPT_DIX_ERR & scsi_debug_opts) inj_dix = 1; /* to reads and writes below */ else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & scsi_debug_opts) inj_short = 1; } 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(SCpnt, ILLEGAL_REQUEST, INVALID_OPCODE, 0); errsts = check_condition_result; return schedule_resp(SCpnt, devip, 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: errsts = check_readiness(SCpnt, UAS_ONLY, devip); if (errsts) 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, UAS_ONLY, devip); break; case TEST_UNIT_READY: /* mandatory */ /* delay_override = 1; */ errsts = check_readiness(SCpnt, UAS_TUR, devip); break; case RESERVE: errsts = check_readiness(SCpnt, UAS_ONLY, devip); break; case RESERVE_10: errsts = check_readiness(SCpnt, UAS_ONLY, devip); break; case RELEASE: errsts = check_readiness(SCpnt, UAS_ONLY, devip); break; case RELEASE_10: errsts = check_readiness(SCpnt, UAS_ONLY, devip); break; case READ_CAPACITY: errsts = resp_readcap(SCpnt, devip); break; case SERVICE_ACTION_IN: if (cmd[1] == SAI_READ_CAPACITY_16) errsts = resp_readcap16(SCpnt, devip); else if (cmd[1] == SAI_GET_LBA_STATUS) { if (scsi_debug_lbp() == 0) { mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, INVALID_COMMAND_OPCODE, 0); errsts = check_condition_result; } else errsts = resp_get_lba_status(SCpnt, devip); } else { mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, INVALID_OPCODE, 0); errsts = check_condition_result; } break; case MAINTENANCE_IN: if (MI_REPORT_TARGET_PGS != cmd[1]) { mk_sense_buffer(SCpnt, 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: /* READ{10,12,16} and DIF Type 2 are natural enemies */ if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && cmd[1] & 0xe0) { mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, INVALID_COMMAND_OPCODE, 0); errsts = check_condition_result; break; } if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION || scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) && (cmd[1] & 0xe0) == 0) printk(KERN_ERR "Unprotected RD/WR to DIF device\n"); /* fall through */ case READ_6: read: errsts = check_readiness(SCpnt, UAS_TUR, devip); if (errsts) break; if (scsi_debug_fake_rw) break; get_data_transfer_info(cmd, &lba, &num, &ei_lba); if (inj_short) num /= 2; errsts = resp_read(SCpnt, lba, num, ei_lba); if (inj_recovered && (0 == errsts)) { mk_sense_buffer(SCpnt, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0); errsts = check_condition_result; } else if (inj_transport && (0 == errsts)) { mk_sense_buffer(SCpnt, ABORTED_COMMAND, TRANSPORT_PROBLEM, ACK_NAK_TO); errsts = check_condition_result; } else if (inj_dif && (0 == errsts)) { /* Logical block guard check failed */ mk_sense_buffer(SCpnt, ABORTED_COMMAND, 0x10, 1); errsts = illegal_condition_result; } else if (inj_dix && (0 == errsts)) { mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, 0x10, 1); errsts = illegal_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, UAS_TUR, devip); break; case WRITE_16: case WRITE_12: case WRITE_10: /* WRITE{10,12,16} and DIF Type 2 are natural enemies */ if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && cmd[1] & 0xe0) { mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, INVALID_COMMAND_OPCODE, 0); errsts = check_condition_result; break; } if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION || scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) && (cmd[1] & 0xe0) == 0) printk(KERN_ERR "Unprotected RD/WR to DIF device\n"); /* fall through */ case WRITE_6: write: errsts = check_readiness(SCpnt, UAS_TUR, devip); if (errsts) break; if (scsi_debug_fake_rw) break; get_data_transfer_info(cmd, &lba, &num, &ei_lba); errsts = resp_write(SCpnt, lba, num, ei_lba); if (inj_recovered && (0 == errsts)) { mk_sense_buffer(SCpnt, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0); errsts = check_condition_result; } else if (inj_dif && (0 == errsts)) { mk_sense_buffer(SCpnt, ABORTED_COMMAND, 0x10, 1); errsts = illegal_condition_result; } else if (inj_dix && (0 == errsts)) { mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, 0x10, 1); errsts = illegal_condition_result; } break; case WRITE_SAME_16: case WRITE_SAME: if (cmd[1] & 0x8) { if ((*cmd == WRITE_SAME_16 && scsi_debug_lbpws == 0) || (*cmd == WRITE_SAME && scsi_debug_lbpws10 == 0)) { mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); errsts = check_condition_result; } else unmap = 1; } if (errsts) break; errsts = check_readiness(SCpnt, UAS_TUR, devip); if (errsts) break; if (scsi_debug_fake_rw) break; get_data_transfer_info(cmd, &lba, &num, &ei_lba); errsts = resp_write_same(SCpnt, lba, num, ei_lba, unmap); break; case UNMAP: errsts = check_readiness(SCpnt, UAS_TUR, devip); if (errsts) break; if (scsi_debug_fake_rw) break; if (scsi_debug_unmap_max_desc == 0 || scsi_debug_lbpu == 0) { mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, INVALID_COMMAND_OPCODE, 0); errsts = check_condition_result; } else errsts = resp_unmap(SCpnt, devip); 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, UAS_TUR, devip); break; case WRITE_BUFFER: errsts = check_readiness(SCpnt, UAS_ONLY, devip); break; case XDWRITEREAD_10: if (!scsi_bidi_cmnd(SCpnt)) { mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); errsts = check_condition_result; break; } errsts = check_readiness(SCpnt, UAS_TUR, devip); if (errsts) break; if (scsi_debug_fake_rw) break; get_data_transfer_info(cmd, &lba, &num, &ei_lba); errsts = resp_read(SCpnt, lba, num, ei_lba); if (errsts) break; errsts = resp_write(SCpnt, lba, num, ei_lba); if (errsts) break; errsts = resp_xdwriteread(SCpnt, lba, num, devip); break; case VARIABLE_LENGTH_CMD: if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION) { if ((cmd[10] & 0xe0) == 0) printk(KERN_ERR "Unprotected RD/WR to DIF device\n"); if (cmd[9] == READ_32) { BUG_ON(SCpnt->cmd_len < 32); goto read; } if (cmd[9] == WRITE_32) { BUG_ON(SCpnt->cmd_len < 32); goto write; } } mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); errsts = check_condition_result; break; case 0x85: if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) sdev_printk(KERN_INFO, SCpnt->device, "%s: ATA PASS-THROUGH(16) not supported\n", my_name); mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, INVALID_OPCODE, 0); errsts = check_condition_result; break; default: if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) sdev_printk(KERN_INFO, SCpnt->device, "%s: Opcode: 0x%x not supported\n", my_name, *cmd); errsts = check_readiness(SCpnt, UAS_ONLY, devip); if (errsts) break; /* Unit attention takes precedence */ mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, INVALID_OPCODE, 0); errsts = check_condition_result; break; } return schedule_resp(SCpnt, devip, errsts, (delay_override ? 0 : scsi_debug_delay)); } static int sdebug_queuecommand_lock_or_not(struct Scsi_Host *shost, struct scsi_cmnd *cmd) { if (scsi_debug_host_lock) { unsigned long iflags; int rc; spin_lock_irqsave(shost->host_lock, iflags); rc = scsi_debug_queuecommand(cmd); spin_unlock_irqrestore(shost->host_lock, iflags); return rc; } else return scsi_debug_queuecommand(cmd); } static int sdebug_change_qdepth(struct scsi_device *sdev, int qdepth, int reason) { int num_in_q = 0; int bad = 0; unsigned long iflags; struct sdebug_dev_info *devip; spin_lock_irqsave(&queued_arr_lock, iflags); devip = (struct sdebug_dev_info *)sdev->hostdata; if (NULL == devip) { spin_unlock_irqrestore(&queued_arr_lock, iflags); return -ENODEV; } num_in_q = atomic_read(&devip->num_in_q); spin_unlock_irqrestore(&queued_arr_lock, iflags); if (reason == SCSI_QDEPTH_DEFAULT || reason == SCSI_QDEPTH_RAMP_UP) { if (qdepth < 1) qdepth = 1; /* allow to exceed max host queued_arr elements for testing */ if (qdepth > SCSI_DEBUG_CANQUEUE + 10) qdepth = SCSI_DEBUG_CANQUEUE + 10; scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth); } else if (reason == SCSI_QDEPTH_QFULL) scsi_track_queue_full(sdev, qdepth); else bad = 1; if (bad) sdev_printk(KERN_WARNING, sdev, "%s: unknown reason=0x%x\n", __func__, reason); if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) { if (SCSI_QDEPTH_QFULL == reason) sdev_printk(KERN_INFO, sdev, "%s: -> %d, num_in_q=%d, reason: queue full\n", __func__, qdepth, num_in_q); else { const char *cp; switch (reason) { case SCSI_QDEPTH_DEFAULT: cp = "default (sysfs ?)"; break; case SCSI_QDEPTH_RAMP_UP: cp = "ramp up"; break; default: cp = "unknown"; break; } sdev_printk(KERN_INFO, sdev, "%s: qdepth=%d, num_in_q=%d, reason: %s\n", __func__, qdepth, num_in_q, cp); } } return sdev->queue_depth; } static int sdebug_change_qtype(struct scsi_device *sdev, int qtype) { if (sdev->tagged_supported) { scsi_set_tag_type(sdev, qtype); if (qtype) scsi_activate_tcq(sdev, sdev->queue_depth); else scsi_deactivate_tcq(sdev, sdev->queue_depth); } else qtype = 0; if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) { const char *cp; switch (qtype) { case 0: cp = "untagged"; break; case MSG_SIMPLE_TAG: cp = "simple tags"; break; case MSG_ORDERED_TAG: cp = "ordered tags"; break; default: cp = "unknown"; break; } sdev_printk(KERN_INFO, sdev, "%s: to %s\n", __func__, cp); } return qtype; } static struct scsi_host_template sdebug_driver_template = { .show_info = scsi_debug_show_info, .write_info = scsi_debug_write_info, .proc_name = sdebug_proc_name, .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 = sdebug_queuecommand_lock_or_not, .change_queue_depth = sdebug_change_qdepth, .change_queue_type = sdebug_change_qtype, .eh_abort_handler = scsi_debug_abort, .eh_device_reset_handler = scsi_debug_device_reset, .eh_target_reset_handler = scsi_debug_target_reset, .eh_bus_reset_handler = scsi_debug_bus_reset, .eh_host_reset_handler = scsi_debug_host_reset, .can_queue = SCSI_DEBUG_CANQUEUE, .this_id = 7, .sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS, .cmd_per_lun = DEF_CMD_PER_LUN, .max_sectors = -1U, .use_clustering = DISABLE_CLUSTERING, .module = THIS_MODULE, }; static int sdebug_driver_probe(struct device * dev) { int error = 0; struct sdebug_host_info *sdbg_host; struct Scsi_Host *hpnt; int host_prot; sdbg_host = to_sdebug_host(dev); sdebug_driver_template.can_queue = scsi_debug_max_queue; if (scsi_debug_clustering) sdebug_driver_template.use_clustering = ENABLE_CLUSTERING; hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host)); if (NULL == hpnt) { printk(KERN_ERR "%s: scsi_register failed\n", __func__); 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; */ host_prot = 0; switch (scsi_debug_dif) { case SD_DIF_TYPE1_PROTECTION: host_prot = SHOST_DIF_TYPE1_PROTECTION; if (scsi_debug_dix) host_prot |= SHOST_DIX_TYPE1_PROTECTION; break; case SD_DIF_TYPE2_PROTECTION: host_prot = SHOST_DIF_TYPE2_PROTECTION; if (scsi_debug_dix) host_prot |= SHOST_DIX_TYPE2_PROTECTION; break; case SD_DIF_TYPE3_PROTECTION: host_prot = SHOST_DIF_TYPE3_PROTECTION; if (scsi_debug_dix) host_prot |= SHOST_DIX_TYPE3_PROTECTION; break; default: if (scsi_debug_dix) host_prot |= SHOST_DIX_TYPE0_PROTECTION; break; } scsi_host_set_prot(hpnt, host_prot); printk(KERN_INFO "scsi_debug: host protection%s%s%s%s%s%s%s\n", (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "", (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "", (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "", (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "", (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "", (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "", (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : ""); if (scsi_debug_guard == 1) scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP); else scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC); error = scsi_add_host(hpnt, &sdbg_host->dev); if (error) { printk(KERN_ERR "%s: scsi_add_host failed\n", __func__); error = -ENODEV; scsi_host_put(hpnt); } else scsi_scan_host(hpnt); return error; } static int sdebug_driver_remove(struct device * dev) { struct sdebug_host_info *sdbg_host; struct sdebug_dev_info *sdbg_devinfo, *tmp; sdbg_host = to_sdebug_host(dev); if (!sdbg_host) { printk(KERN_ERR "%s: Unable to locate host info\n", __func__); return -ENODEV; } scsi_remove_host(sdbg_host->shost); list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list, dev_list) { list_del(&sdbg_devinfo->dev_list); kfree(sdbg_devinfo); } scsi_host_put(sdbg_host->shost); return 0; } 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, .drv_groups = sdebug_drv_groups, };