/* * 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 "sd.h" #include "scsi_logging.h" #define SCSI_DEBUG_VERSION "1.82" static const char * scsi_debug_version_date = "20100324"; /* Additional Sense Code (ASC) */ #define NO_ADDITIONAL_SENSE 0x0 #define LOGICAL_UNIT_NOT_READY 0x4 #define UNRECOVERED_READ_ERR 0x11 #define PARAMETER_LIST_LENGTH_ERR 0x1a #define INVALID_OPCODE 0x20 #define ADDR_OUT_OF_RANGE 0x21 #define INVALID_COMMAND_OPCODE 0x20 #define INVALID_FIELD_IN_CDB 0x24 #define INVALID_FIELD_IN_PARAM_LIST 0x26 #define POWERON_RESET 0x29 #define SAVING_PARAMS_UNSUP 0x39 #define TRANSPORT_PROBLEM 0x4b #define THRESHOLD_EXCEEDED 0x5d #define LOW_POWER_COND_ON 0x5e /* Additional Sense Code Qualifier (ASCQ) */ #define ACK_NAK_TO 0x3 #define SDEBUG_TAGGED_QUEUING 0 /* 0 | MSG_SIMPLE_TAG | MSG_ORDERED_TAG */ /* Default values for driver parameters */ #define DEF_NUM_HOST 1 #define DEF_NUM_TGTS 1 #define DEF_MAX_LUNS 1 /* With these defaults, this driver will make 1 host with 1 target * (id 0) containing 1 logical unit (lun 0). That is 1 device. */ #define DEF_ATO 1 #define DEF_DELAY 1 #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_LBPU 0 #define DEF_LBPWS 0 #define DEF_LBPWS10 0 #define DEF_LBPRZ 1 #define DEF_LOWEST_ALIGNED 0 #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_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 /* 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 /* When "every_nth" > 0 then modulo "every_nth" commands: * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set * - a RECOVERED_ERROR is simulated on successful read and write * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set. * - a TRANSPORT_ERROR is simulated on successful read and write * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set. * * When "every_nth" < 0 then after "- every_nth" commands: * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set * - a RECOVERED_ERROR is simulated on successful read and write * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set. * - a TRANSPORT_ERROR is simulated on successful read and write * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set. * This will continue until some other action occurs (e.g. the user * writing a new value (other than -1 or 1) to every_nth via sysfs). */ /* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this * sector on read commands: */ #define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */ #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 /* Can queue up to this number of commands. Typically commands that * that have a non-zero delay are queued. */ #define SCSI_DEBUG_CANQUEUE 255 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 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 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 int scsi_debug_cmnd_count = 0; #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 SDEBUG_SENSE_LEN 32 #define SCSI_DEBUG_MAX_CMD_LEN 32 static unsigned int scsi_debug_lbp(void) { return scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10; } struct sdebug_dev_info { struct list_head dev_list; unsigned char sense_buff[SDEBUG_SENSE_LEN]; /* weak nexus */ unsigned int channel; unsigned int target; unsigned int lun; struct sdebug_host_info *sdbg_host; unsigned int wlun; char reset; char stopped; char used; }; struct sdebug_host_info { struct list_head host_list; struct Scsi_Host *shost; struct device dev; struct list_head dev_info_list; }; #define to_sdebug_host(d) \ container_of(d, struct sdebug_host_info, dev) static LIST_HEAD(sdebug_host_list); static DEFINE_SPINLOCK(sdebug_host_list_lock); typedef void (* done_funct_t) (struct scsi_cmnd *); struct sdebug_queued_cmd { int in_use; struct timer_list cmnd_timer; done_funct_t done_funct; struct scsi_cmnd * a_cmnd; int scsi_result; }; static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE]; static unsigned char * fake_storep; /* ramdisk storage */ static unsigned char *dif_storep; /* protection info */ static void *map_storep; /* provisioning map */ static unsigned long map_size; static int num_aborts = 0; static int num_dev_resets = 0; static int num_bus_resets = 0; static int num_host_resets = 0; 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[] = "scsi_debug"; static struct bus_type pseudo_lld_bus; static inline sector_t dif_offset(sector_t sector) { return sector << 3; } 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 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 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 sdebug_dev_info *devip, int key, int asc, int asq) { unsigned char *sbuff; sbuff = devip->sense_buff; memset(sbuff, 0, SDEBUG_SENSE_LEN); scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq); if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) printk(KERN_INFO "scsi_debug: [sense_key,asc,ascq]: " "[0x%x,0x%x,0x%x]\n", key, asc, asq); } static 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) { printk(KERN_INFO "scsi_debug: ioctl: cmd=0x%x\n", cmd); } return -EINVAL; /* return -ENOTTY; // correct return but upsets fdisk */ } static int check_readiness(struct scsi_cmnd * SCpnt, int reset_only, struct sdebug_dev_info * devip) { if (devip->reset) { if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) printk(KERN_INFO "scsi_debug: Reporting Unit " "attention: power on reset\n"); devip->reset = 0; mk_sense_buffer(devip, UNIT_ATTENTION, POWERON_RESET, 0); return check_condition_result; } if ((0 == reset_only) && devip->stopped) { if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) printk(KERN_INFO "scsi_debug: Reporting Not " "ready: initializing command required\n"); mk_sense_buffer(devip, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2); return check_condition_result; } return 0; } /* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */ static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr, int arr_len) { int 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); if (sdb->resid) sdb->resid -= act_len; else 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 = "0004"; static int inquiry_evpd_83(unsigned char * arr, int port_group_id, int target_dev_id, int dev_id_num, const char * dev_id_str, int dev_id_str_len) { int num, port_a; char b[32]; port_a = target_dev_id + 1; /* T10 vendor identifier field format (faked) */ arr[0] = 0x2; /* ASCII */ arr[1] = 0x1; arr[2] = 0x0; memcpy(&arr[4], inq_vendor_id, 8); memcpy(&arr[12], inq_product_id, 16); memcpy(&arr[28], dev_id_str, dev_id_str_len); num = 8 + 16 + dev_id_str_len; arr[3] = num; num += 4; if (dev_id_num >= 0) { /* NAA-5, Logical unit identifier (binary) */ arr[num++] = 0x1; /* binary (not necessarily sas) */ arr[num++] = 0x3; /* PIV=0, lu, naa */ arr[num++] = 0x0; arr[num++] = 0x8; arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */ arr[num++] = 0x33; arr[num++] = 0x33; arr[num++] = 0x30; arr[num++] = (dev_id_num >> 24); arr[num++] = (dev_id_num >> 16) & 0xff; arr[num++] = (dev_id_num >> 8) & 0xff; arr[num++] = dev_id_num & 0xff; /* Target relative port number */ arr[num++] = 0x61; /* proto=sas, binary */ arr[num++] = 0x94; /* PIV=1, target port, rel port */ arr[num++] = 0x0; /* reserved */ arr[num++] = 0x4; /* length */ arr[num++] = 0x0; /* reserved */ arr[num++] = 0x0; /* reserved */ arr[num++] = 0x0; arr[num++] = 0x1; /* relative port A */ } /* NAA-5, Target port identifier */ arr[num++] = 0x61; /* proto=sas, binary */ arr[num++] = 0x93; /* piv=1, target port, naa */ arr[num++] = 0x0; arr[num++] = 0x8; arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */ arr[num++] = 0x22; arr[num++] = 0x22; arr[num++] = 0x20; arr[num++] = (port_a >> 24); arr[num++] = (port_a >> 16) & 0xff; arr[num++] = (port_a >> 8) & 0xff; arr[num++] = port_a & 0xff; /* NAA-5, Target port group identifier */ arr[num++] = 0x61; /* proto=sas, binary */ arr[num++] = 0x95; /* piv=1, target port group id */ arr[num++] = 0x0; arr[num++] = 0x4; arr[num++] = 0; arr[num++] = 0; arr[num++] = (port_group_id >> 8) & 0xff; arr[num++] = port_group_id & 0xff; /* NAA-5, Target device identifier */ arr[num++] = 0x61; /* proto=sas, binary */ arr[num++] = 0xa3; /* piv=1, target device, naa */ arr[num++] = 0x0; arr[num++] = 0x8; arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */ arr[num++] = 0x22; arr[num++] = 0x22; arr[num++] = 0x20; arr[num++] = (target_dev_id >> 24); arr[num++] = (target_dev_id >> 16) & 0xff; arr[num++] = (target_dev_id >> 8) & 0xff; arr[num++] = target_dev_id & 0xff; /* SCSI name string: Target device identifier */ arr[num++] = 0x63; /* proto=sas, UTF-8 */ arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */ arr[num++] = 0x0; arr[num++] = 24; memcpy(arr + num, "naa.52222220", 12); num += 12; snprintf(b, sizeof(b), "%08X", target_dev_id); memcpy(arr + num, b, 8); num += 8; memset(arr + num, 0, 4); num += 4; return num; } static unsigned char vpd84_data[] = { /* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0, 0x22,0x22,0x22,0x0,0xbb,0x1, 0x22,0x22,0x22,0x0,0xbb,0x2, }; static int inquiry_evpd_84(unsigned char * arr) { memcpy(arr, vpd84_data, sizeof(vpd84_data)); return sizeof(vpd84_data); } static int inquiry_evpd_85(unsigned char * arr) { int num = 0; const char * na1 = "https://www.kernel.org/config"; const char * na2 = "http://www.kernel.org/log"; int plen, olen; arr[num++] = 0x1; /* lu, storage config */ arr[num++] = 0x0; /* reserved */ arr[num++] = 0x0; olen = strlen(na1); plen = olen + 1; if (plen % 4) plen = ((plen / 4) + 1) * 4; arr[num++] = plen; /* length, null termianted, padded */ memcpy(arr + num, na1, olen); memset(arr + num + olen, 0, plen - olen); num += plen; arr[num++] = 0x4; /* lu, logging */ arr[num++] = 0x0; /* reserved */ arr[num++] = 0x0; olen = strlen(na2); plen = olen + 1; if (plen % 4) plen = ((plen / 4) + 1) * 4; arr[num++] = plen; /* length, null terminated, padded */ memcpy(arr + num, na2, olen); memset(arr + num + olen, 0, plen - olen); num += plen; return num; } /* SCSI ports VPD page */ static int inquiry_evpd_88(unsigned char * arr, int target_dev_id) { int num = 0; int port_a, port_b; port_a = target_dev_id + 1; port_b = port_a + 1; arr[num++] = 0x0; /* reserved */ arr[num++] = 0x0; /* reserved */ arr[num++] = 0x0; arr[num++] = 0x1; /* relative port 1 (primary) */ memset(arr + num, 0, 6); num += 6; arr[num++] = 0x0; arr[num++] = 12; /* length tp descriptor */ /* naa-5 target port identifier (A) */ arr[num++] = 0x61; /* proto=sas, binary */ arr[num++] = 0x93; /* PIV=1, target port, NAA */ arr[num++] = 0x0; /* reserved */ arr[num++] = 0x8; /* length */ arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */ arr[num++] = 0x22; arr[num++] = 0x22; arr[num++] = 0x20; arr[num++] = (port_a >> 24); arr[num++] = (port_a >> 16) & 0xff; arr[num++] = (port_a >> 8) & 0xff; arr[num++] = port_a & 0xff; arr[num++] = 0x0; /* reserved */ arr[num++] = 0x0; /* reserved */ arr[num++] = 0x0; arr[num++] = 0x2; /* relative port 2 (secondary) */ memset(arr + num, 0, 6); num += 6; arr[num++] = 0x0; arr[num++] = 12; /* length tp descriptor */ /* naa-5 target port identifier (B) */ arr[num++] = 0x61; /* proto=sas, binary */ arr[num++] = 0x93; /* PIV=1, target port, NAA */ arr[num++] = 0x0; /* reserved */ arr[num++] = 0x8; /* length */ arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */ arr[num++] = 0x22; arr[num++] = 0x22; arr[num++] = 0x20; arr[num++] = (port_b >> 24); arr[num++] = (port_b >> 16) & 0xff; arr[num++] = (port_b >> 8) & 0xff; arr[num++] = port_b & 0xff; return num; } static unsigned char vpd89_data[] = { /* from 4th byte */ 0,0,0,0, 'l','i','n','u','x',' ',' ',' ', 'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ', '1','2','3','4', 0x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0, 0xec,0,0,0, 0x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0, 0,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20, 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33, 0x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31, 0x53,0x41, 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, 0x20,0x20, 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, 0x10,0x80, 0,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0, 0x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0, 0x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0, 0x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40, 0x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0, 0,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42, 0,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8, 0xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe, 0,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51, }; static int inquiry_evpd_89(unsigned char * arr) { memcpy(arr, vpd89_data, sizeof(vpd89_data)); return sizeof(vpd89_data); } /* Block limits VPD page (SBC-3) */ 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, }; 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 = (unsigned char *)scp->cmnd; int alloc_len, n, ret; alloc_len = (cmd[3] << 8) + cmd[4]; arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC); if (! arr) return DID_REQUEUE << 16; if (devip->wlun) pq_pdt = 0x1e; /* present, wlun */ else if (scsi_debug_no_lun_0 && (0 == devip->lun)) pq_pdt = 0x7f; /* not present, no device type */ else pq_pdt = (scsi_debug_ptype & 0x1f); arr[0] = pq_pdt; if (0x2 & cmd[1]) { /* CMDDT bit set */ mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); kfree(arr); return check_condition_result; } else if (0x1 & cmd[1]) { /* EVPD bit set */ int lu_id_num, port_group_id, target_dev_id, len; char lu_id_str[6]; int host_no = devip->sdbg_host->shost->host_no; port_group_id = (((host_no + 1) & 0x7f) << 8) + (devip->channel & 0x7f); if (0 == scsi_debug_vpd_use_hostno) host_no = 0; lu_id_num = devip->wlun ? -1 : (((host_no + 1) * 2000) + (devip->target * 1000) + devip->lun); target_dev_id = ((host_no + 1) * 2000) + (devip->target * 1000) - 3; len = scnprintf(lu_id_str, 6, "%d", lu_id_num); if (0 == cmd[2]) { /* supported vital product data pages */ arr[1] = cmd[2]; /*sanity */ n = 4; arr[n++] = 0x0; /* this page */ arr[n++] = 0x80; /* unit serial number */ arr[n++] = 0x83; /* device identification */ arr[n++] = 0x84; /* software interface ident. */ arr[n++] = 0x85; /* management network addresses */ arr[n++] = 0x86; /* extended inquiry */ arr[n++] = 0x87; /* mode page policy */ arr[n++] = 0x88; /* SCSI ports */ arr[n++] = 0x89; /* ATA information */ arr[n++] = 0xb0; /* Block limits (SBC) */ arr[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(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); kfree(arr); return check_condition_result; } len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len); ret = fill_from_dev_buffer(scp, arr, min(len, SDEBUG_MAX_INQ_ARR_SZ)); kfree(arr); return ret; } /* drops through here for a standard inquiry */ arr[1] = 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 = (unsigned char *)scp->cmnd; unsigned char arr[SDEBUG_SENSE_LEN]; int want_dsense; int len = 18; memset(arr, 0, sizeof(arr)); if (devip->reset == 1) mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0); want_dsense = !!(cmd[1] & 1) || scsi_debug_dsense; sbuff = devip->sense_buff; if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) { if (want_dsense) { arr[0] = 0x72; arr[1] = 0x0; /* NO_SENSE in sense_key */ arr[2] = THRESHOLD_EXCEEDED; arr[3] = 0xff; /* TEST set and MRIE==6 */ } else { arr[0] = 0x70; arr[2] = 0x0; /* NO_SENSE in sense_key */ arr[7] = 0xa; /* 18 byte sense buffer */ arr[12] = THRESHOLD_EXCEEDED; arr[13] = 0xff; /* TEST set and MRIE==6 */ } } else { memcpy(arr, sbuff, SDEBUG_SENSE_LEN); if ((cmd[1] & 1) && (! scsi_debug_dsense)) { /* DESC bit set and sense_buff in fixed format */ memset(arr, 0, sizeof(arr)); arr[0] = 0x72; arr[1] = sbuff[2]; /* sense key */ arr[2] = sbuff[12]; /* asc */ arr[3] = sbuff[13]; /* ascq */ len = 8; } } mk_sense_buffer(devip, 0, NO_ADDITIONAL_SENSE, 0); return fill_from_dev_buffer(scp, arr, len); } static int resp_start_stop(struct scsi_cmnd * scp, struct sdebug_dev_info * devip) { unsigned char *cmd = (unsigned char *)scp->cmnd; int power_cond, errsts, start; if ((errsts = check_readiness(scp, 1, devip))) return errsts; power_cond = (cmd[4] & 0xf0) >> 4; if (power_cond) { mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } start = cmd[4] & 1; if (start == devip->stopped) devip->stopped = !start; return 0; } 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; if ((errsts = check_readiness(scp, 1, devip))) 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 = (unsigned char *)scp->cmnd; unsigned char arr[SDEBUG_READCAP16_ARR_SZ]; unsigned long long capac; int errsts, k, alloc_len; if ((errsts = check_readiness(scp, 1, devip))) return errsts; alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8) + cmd[13]); /* following just in case virtual_gb changed */ 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 = (unsigned char *)scp->cmnd; unsigned char * arr; int host_no = devip->sdbg_host->shost->host_no; int n, ret, alen, rlen; int port_group_a, port_group_b, port_a, port_b; alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8) + cmd[9]); arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC); if (! arr) return DID_REQUEUE << 16; /* * EVPD page 0x88 states we have two ports, one * real and a fake port with no device connected. * So we create two port groups with one port each * and set the group with port B to unavailable. */ port_a = 0x1; /* relative port A */ port_b = 0x2; /* relative port B */ port_group_a = (((host_no + 1) & 0x7f) << 8) + (devip->channel & 0x7f); port_group_b = (((host_no + 1) & 0x7f) << 8) + (devip->channel & 0x7f) + 0x80; /* * The asymmetric access state is cycled according to the host_id. */ n = 4; if (0 == scsi_debug_vpd_use_hostno) { arr[n++] = host_no % 3; /* Asymm access state */ arr[n++] = 0x0F; /* claim: all states are supported */ } else { arr[n++] = 0x0; /* Active/Optimized path */ arr[n++] = 0x01; /* claim: only support active/optimized paths */ } arr[n++] = (port_group_a >> 8) & 0xff; arr[n++] = port_group_a & 0xff; arr[n++] = 0; /* Reserved */ arr[n++] = 0; /* Status code */ arr[n++] = 0; /* Vendor unique */ arr[n++] = 0x1; /* One port per group */ arr[n++] = 0; /* Reserved */ arr[n++] = 0; /* Reserved */ arr[n++] = (port_a >> 8) & 0xff; arr[n++] = port_a & 0xff; arr[n++] = 3; /* Port unavailable */ arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */ arr[n++] = (port_group_b >> 8) & 0xff; arr[n++] = port_group_b & 0xff; arr[n++] = 0; /* Reserved */ arr[n++] = 0; /* Status code */ arr[n++] = 0; /* Vendor unique */ arr[n++] = 0x1; /* One port per group */ arr[n++] = 0; /* Reserved */ arr[n++] = 0; /* Reserved */ arr[n++] = (port_b >> 8) & 0xff; arr[n++] = port_b & 0xff; rlen = n - 4; arr[0] = (rlen >> 24) & 0xff; arr[1] = (rlen >> 16) & 0xff; arr[2] = (rlen >> 8) & 0xff; arr[3] = rlen & 0xff; /* * Return the smallest value of either * - The allocated length * - The constructed command length * - The maximum array size */ rlen = min(alen,n); ret = fill_from_dev_buffer(scp, arr, min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ)); kfree(arr); return ret; } /* <> */ 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 caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0}; memcpy(p, caching_pg, sizeof(caching_pg)); if (1 == pcontrol) memset(p + 2, 0, sizeof(caching_pg) - 2); return sizeof(caching_pg); } static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target) { /* Control mode page for mode_sense */ unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0, 0, 0, 0, 0}; unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, 0, 0, 0x2, 0x4b}; if (scsi_debug_dsense) ctrl_m_pg[2] |= 0x4; else ctrl_m_pg[2] &= ~0x4; 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 = (unsigned char *)scp->cmnd; if ((errsts = check_readiness(scp, 1, devip))) return errsts; dbd = !!(cmd[1] & 0x8); pcontrol = (cmd[2] & 0xc0) >> 6; pcode = cmd[2] & 0x3f; subpcode = cmd[3]; msense_6 = (MODE_SENSE == cmd[0]); llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10); if ((0 == scsi_debug_ptype) && (0 == dbd)) bd_len = llbaa ? 16 : 8; else bd_len = 0; alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]); memset(arr, 0, SDEBUG_MAX_MSENSE_SZ); if (0x3 == pcontrol) { /* Saving values not supported */ mk_sense_buffer(devip, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0); return check_condition_result; } target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) + (devip->target * 1000) - 3; /* set DPOFUA bit for disks */ if (0 == scsi_debug_ptype) dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10; else dev_spec = 0x0; if (msense_6) { arr[2] = dev_spec; arr[3] = bd_len; offset = 4; } else { arr[3] = dev_spec; if (16 == bd_len) arr[4] = 0x1; /* set LONGLBA bit */ arr[7] = bd_len; /* assume 255 or less */ offset = 8; } ap = arr + offset; if ((bd_len > 0) && (!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(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } switch (pcode) { case 0x1: /* Read-Write error recovery page, direct access */ len = resp_err_recov_pg(ap, pcontrol, target); offset += len; break; case 0x2: /* Disconnect-Reconnect page, all devices */ len = resp_disconnect_pg(ap, pcontrol, target); offset += len; break; case 0x3: /* Format device page, direct access */ len = resp_format_pg(ap, pcontrol, target); offset += len; break; case 0x8: /* Caching page, direct access */ len = resp_caching_pg(ap, pcontrol, target); offset += len; break; case 0xa: /* Control Mode page, all devices */ len = resp_ctrl_m_pg(ap, pcontrol, target); offset += len; break; case 0x19: /* if spc==1 then sas phy, control+discover */ if ((subpcode > 0x2) && (subpcode < 0xff)) { mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } len = 0; if ((0x0 == subpcode) || (0xff == subpcode)) len += resp_sas_sf_m_pg(ap + len, pcontrol, target); if ((0x1 == subpcode) || (0xff == subpcode)) len += resp_sas_pcd_m_spg(ap + len, pcontrol, target, target_dev_id); if ((0x2 == subpcode) || (0xff == subpcode)) len += resp_sas_sha_m_spg(ap + len, pcontrol); offset += len; break; case 0x1c: /* Informational Exceptions Mode page, all devices */ len = resp_iec_m_pg(ap, pcontrol, target); offset += len; break; case 0x3f: /* Read all Mode pages */ if ((0 == subpcode) || (0xff == subpcode)) { len = resp_err_recov_pg(ap, pcontrol, target); len += resp_disconnect_pg(ap + len, pcontrol, target); len += resp_format_pg(ap + len, pcontrol, target); len += resp_caching_pg(ap + len, pcontrol, target); len += resp_ctrl_m_pg(ap + len, pcontrol, target); len += resp_sas_sf_m_pg(ap + len, pcontrol, target); if (0xff == subpcode) { len += resp_sas_pcd_m_spg(ap + len, pcontrol, target, target_dev_id); len += resp_sas_sha_m_spg(ap + len, pcontrol); } len += resp_iec_m_pg(ap + len, pcontrol, target); } else { mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } offset += len; break; default: mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } if (msense_6) arr[0] = offset - 1; else { arr[0] = ((offset - 2) >> 8) & 0xff; arr[1] = (offset - 2) & 0xff; } return fill_from_dev_buffer(scp, arr, min(alloc_len, offset)); } #define SDEBUG_MAX_MSELECT_SZ 512 static int resp_mode_select(struct scsi_cmnd * scp, int mselect6, struct sdebug_dev_info * devip) { int pf, sp, ps, md_len, bd_len, off, spf, pg_len; int param_len, res, errsts, mpage; unsigned char arr[SDEBUG_MAX_MSELECT_SZ]; unsigned char *cmd = (unsigned char *)scp->cmnd; if ((errsts = check_readiness(scp, 1, devip))) return errsts; memset(arr, 0, sizeof(arr)); pf = cmd[1] & 0x10; sp = cmd[1] & 0x1; param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]); if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) { mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } res = fetch_to_dev_buffer(scp, arr, param_len); if (-1 == res) return (DID_ERROR << 16); else if ((res < param_len) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) printk(KERN_INFO "scsi_debug: mode_select: cdb indicated=%d, " " IO sent=%d bytes\n", param_len, res); md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2); bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]); if (md_len > 2) { mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_PARAM_LIST, 0); return check_condition_result; } off = bd_len + (mselect6 ? 4 : 8); mpage = arr[off] & 0x3f; ps = !!(arr[off] & 0x80); if (ps) { mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_PARAM_LIST, 0); return check_condition_result; } spf = !!(arr[off] & 0x40); pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) : (arr[off + 1] + 2); if ((pg_len + off) > param_len) { mk_sense_buffer(devip, ILLEGAL_REQUEST, PARAMETER_LIST_LENGTH_ERR, 0); return check_condition_result; } switch (mpage) { case 0xa: /* Control Mode page */ if (ctrl_m_pg[1] == arr[off + 1]) { memcpy(ctrl_m_pg + 2, arr + off + 2, sizeof(ctrl_m_pg) - 2); scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4); return 0; } break; case 0x1c: /* Informational Exceptions Mode page */ if (iec_m_pg[1] == arr[off + 1]) { memcpy(iec_m_pg + 2, arr + off + 2, sizeof(iec_m_pg) - 2); return 0; } break; default: break; } mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_PARAM_LIST, 0); return check_condition_result; } static int resp_temp_l_pg(unsigned char * arr) { unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38, 0x0, 0x1, 0x3, 0x2, 0x0, 65, }; memcpy(arr, temp_l_pg, sizeof(temp_l_pg)); return sizeof(temp_l_pg); } static int resp_ie_l_pg(unsigned char * arr) { unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38, }; memcpy(arr, ie_l_pg, sizeof(ie_l_pg)); if (iec_m_pg[2] & 0x4) { /* TEST bit set */ arr[4] = THRESHOLD_EXCEEDED; arr[5] = 0xff; } return sizeof(ie_l_pg); } #define SDEBUG_MAX_LSENSE_SZ 512 static int resp_log_sense(struct scsi_cmnd * scp, struct sdebug_dev_info * devip) { int ppc, sp, pcontrol, pcode, subpcode, alloc_len, errsts, len, n; unsigned char arr[SDEBUG_MAX_LSENSE_SZ]; unsigned char *cmd = (unsigned char *)scp->cmnd; if ((errsts = check_readiness(scp, 1, devip))) return errsts; memset(arr, 0, sizeof(arr)); ppc = cmd[1] & 0x2; sp = cmd[1] & 0x1; if (ppc || sp) { mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } pcontrol = (cmd[2] & 0xc0) >> 6; pcode = cmd[2] & 0x3f; subpcode = cmd[3] & 0xff; alloc_len = (cmd[7] << 8) + cmd[8]; arr[0] = pcode; if (0 == subpcode) { switch (pcode) { case 0x0: /* Supported log pages log page */ n = 4; arr[n++] = 0x0; /* this page */ arr[n++] = 0xd; /* Temperature */ arr[n++] = 0x2f; /* Informational exceptions */ arr[3] = n - 4; break; case 0xd: /* Temperature log page */ arr[3] = resp_temp_l_pg(arr + 4); break; case 0x2f: /* Informational exceptions log page */ arr[3] = resp_ie_l_pg(arr + 4); break; default: mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } } else if (0xff == subpcode) { arr[0] |= 0x40; arr[1] = subpcode; switch (pcode) { case 0x0: /* Supported log pages and subpages log page */ n = 4; arr[n++] = 0x0; arr[n++] = 0x0; /* 0,0 page */ arr[n++] = 0x0; arr[n++] = 0xff; /* this page */ arr[n++] = 0xd; arr[n++] = 0x0; /* Temperature */ arr[n++] = 0x2f; arr[n++] = 0x0; /* Informational exceptions */ arr[3] = n - 4; break; case 0xd: /* Temperature subpages */ n = 4; arr[n++] = 0xd; arr[n++] = 0x0; /* Temperature */ arr[3] = n - 4; break; case 0x2f: /* Informational exceptions subpages */ n = 4; arr[n++] = 0x2f; arr[n++] = 0x0; /* Informational exceptions */ arr[3] = n - 4; break; default: mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } } else { mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len); return fill_from_dev_buffer(scp, arr, min(len, SDEBUG_MAX_INQ_ARR_SZ)); } static int check_device_access_params(struct sdebug_dev_info *devi, unsigned long long lba, unsigned int num) { if (lba + num > sdebug_capacity) { mk_sense_buffer(devi, 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(devi, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } return 0; } static int do_device_access(struct scsi_cmnd *scmd, struct sdebug_dev_info *devi, unsigned long long lba, unsigned int num, int write) { int ret; unsigned long long block, rest = 0; int (*func)(struct scsi_cmnd *, unsigned char *, int); func = write ? fetch_to_dev_buffer : fill_from_dev_buffer; block = do_div(lba, sdebug_store_sectors); if (block + num > sdebug_store_sectors) rest = block + num - sdebug_store_sectors; ret = func(scmd, fake_storep + (block * scsi_debug_sector_size), (num - rest) * scsi_debug_sector_size); if (!ret && rest) ret = func(scmd, fake_storep, rest * scsi_debug_sector_size); return ret; } static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec, unsigned int sectors, u32 ei_lba) { unsigned int i, resid; struct scatterlist *psgl; struct sd_dif_tuple *sdt; sector_t sector; sector_t tmp_sec = start_sec; void *paddr; start_sec = do_div(tmp_sec, sdebug_store_sectors); sdt = (struct sd_dif_tuple *)(dif_storep + dif_offset(start_sec)); for (i = 0 ; i < sectors ; i++) { u16 csum; if (sdt[i].app_tag == 0xffff) continue; sector = start_sec + i; switch (scsi_debug_guard) { case 1: csum = ip_compute_csum(fake_storep + sector * scsi_debug_sector_size, scsi_debug_sector_size); break; case 0: csum = crc_t10dif(fake_storep + sector * scsi_debug_sector_size, scsi_debug_sector_size); csum = cpu_to_be16(csum); break; default: BUG(); } if (sdt[i].guard_tag != csum) { printk(KERN_ERR "%s: GUARD check failed on sector %lu" \ " rcvd 0x%04x, data 0x%04x\n", __func__, (unsigned long)sector, be16_to_cpu(sdt[i].guard_tag), be16_to_cpu(csum)); dif_errors++; return 0x01; } if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION && be32_to_cpu(sdt[i].ref_tag) != (sector & 0xffffffff)) { printk(KERN_ERR "%s: REF check failed on sector %lu\n", __func__, (unsigned long)sector); dif_errors++; return 0x03; } if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && be32_to_cpu(sdt[i].ref_tag) != ei_lba) { printk(KERN_ERR "%s: REF check failed on sector %lu\n", __func__, (unsigned long)sector); dif_errors++; return 0x03; } ei_lba++; } resid = sectors * 8; /* Bytes of protection data to copy into sgl */ sector = start_sec; scsi_for_each_prot_sg(SCpnt, psgl, scsi_prot_sg_count(SCpnt), i) { int len = min(psgl->length, resid); paddr = kmap_atomic(sg_page(psgl)) + psgl->offset; memcpy(paddr, dif_storep + dif_offset(sector), len); sector += len >> 3; if (sector >= sdebug_store_sectors) { /* Force wrap */ tmp_sec = sector; sector = do_div(tmp_sec, sdebug_store_sectors); } resid -= len; kunmap_atomic(paddr); } dix_reads++; return 0; } static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba, unsigned int num, struct sdebug_dev_info *devip, u32 ei_lba) { unsigned long iflags; int ret; ret = check_device_access_params(devip, 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(devip, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0); /* set info field and valid bit for fixed descriptor */ if (0x70 == (devip->sense_buff[0] & 0x7f)) { devip->sense_buff[0] |= 0x80; /* Valid bit */ ret = (lba < OPT_MEDIUM_ERR_ADDR) ? OPT_MEDIUM_ERR_ADDR : (int)lba; devip->sense_buff[3] = (ret >> 24) & 0xff; devip->sense_buff[4] = (ret >> 16) & 0xff; devip->sense_buff[5] = (ret >> 8) & 0xff; devip->sense_buff[6] = ret & 0xff; } scsi_set_resid(SCpnt, scsi_bufflen(SCpnt)); return check_condition_result; } /* 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) { mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, prot_ret); return illegal_condition_result; } } read_lock_irqsave(&atomic_rw, iflags); ret = do_device_access(SCpnt, devip, lba, num, 0); read_unlock_irqrestore(&atomic_rw, iflags); return ret; } void dump_sector(unsigned char *buf, int len) { int i, j; printk(KERN_ERR ">>> Sector Dump <<<\n"); for (i = 0 ; i < len ; i += 16) { printk(KERN_ERR "%04d: ", i); for (j = 0 ; j < 16 ; j++) { unsigned char c = buf[i+j]; if (c >= 0x20 && c < 0x7e) printk(" %c ", buf[i+j]); else printk("%02x ", buf[i+j]); } printk("\n"); } } static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec, unsigned int sectors, u32 ei_lba) { int i, j, ret; struct sd_dif_tuple *sdt; struct scatterlist *dsgl = scsi_sglist(SCpnt); struct scatterlist *psgl = scsi_prot_sglist(SCpnt); void *daddr, *paddr; sector_t tmp_sec = start_sec; sector_t sector; int ppage_offset; unsigned short csum; sector = do_div(tmp_sec, sdebug_store_sectors); BUG_ON(scsi_sg_count(SCpnt) == 0); BUG_ON(scsi_prot_sg_count(SCpnt) == 0); paddr = kmap_atomic(sg_page(psgl)) + psgl->offset; ppage_offset = 0; /* For each data page */ scsi_for_each_sg(SCpnt, dsgl, scsi_sg_count(SCpnt), i) { daddr = kmap_atomic(sg_page(dsgl)) + dsgl->offset; /* For each sector-sized chunk in data page */ for (j = 0 ; j < dsgl->length ; j += scsi_debug_sector_size) { /* If we're at the end of the current * protection page advance to the next one */ if (ppage_offset >= psgl->length) { kunmap_atomic(paddr); psgl = sg_next(psgl); BUG_ON(psgl == NULL); paddr = kmap_atomic(sg_page(psgl)) + psgl->offset; ppage_offset = 0; } sdt = paddr + ppage_offset; switch (scsi_debug_guard) { case 1: csum = ip_compute_csum(daddr, scsi_debug_sector_size); break; case 0: csum = cpu_to_be16(crc_t10dif(daddr, scsi_debug_sector_size)); break; default: BUG(); ret = 0; goto out; } if (sdt->guard_tag != csum) { printk(KERN_ERR "%s: GUARD check failed on sector %lu " \ "rcvd 0x%04x, calculated 0x%04x\n", __func__, (unsigned long)sector, be16_to_cpu(sdt->guard_tag), be16_to_cpu(csum)); ret = 0x01; dump_sector(daddr, scsi_debug_sector_size); goto out; } if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION && be32_to_cpu(sdt->ref_tag) != (start_sec & 0xffffffff)) { printk(KERN_ERR "%s: REF check failed on sector %lu\n", __func__, (unsigned long)sector); ret = 0x03; dump_sector(daddr, scsi_debug_sector_size); goto out; } if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION && be32_to_cpu(sdt->ref_tag) != ei_lba) { printk(KERN_ERR "%s: REF check failed on sector %lu\n", __func__, (unsigned long)sector); ret = 0x03; dump_sector(daddr, scsi_debug_sector_size); goto out; } /* Would be great to copy this in bigger * chunks. However, for the sake of * correctness we need to verify each sector * before writing it to "stable" storage */ memcpy(dif_storep + dif_offset(sector), sdt, 8); sector++; if (sector == sdebug_store_sectors) sector = 0; /* Force wrap */ start_sec++; ei_lba++; daddr += scsi_debug_sector_size; ppage_offset += sizeof(struct sd_dif_tuple); } kunmap_atomic(daddr); } kunmap_atomic(paddr); dix_writes++; return 0; out: dif_errors++; kunmap_atomic(daddr); kunmap_atomic(paddr); return ret; } static unsigned int map_state(sector_t lba, unsigned int *num) { unsigned int granularity, alignment, mapped; sector_t block, next, end; granularity = scsi_debug_unmap_granularity; alignment = granularity - scsi_debug_unmap_alignment; block = lba + alignment; do_div(block, granularity); mapped = test_bit(block, map_storep); if (mapped) next = find_next_zero_bit(map_storep, map_size, block); else next = find_next_bit(map_storep, map_size, block); end = next * granularity - scsi_debug_unmap_alignment; *num = end - lba; return mapped; } static void map_region(sector_t lba, unsigned int len) { unsigned int granularity, alignment; sector_t end = lba + len; granularity = scsi_debug_unmap_granularity; alignment = granularity - scsi_debug_unmap_alignment; while (lba < end) { sector_t block, rem; block = lba + alignment; rem = do_div(block, granularity); if (block < map_size) set_bit(block, map_storep); lba += granularity - rem; } } static void unmap_region(sector_t lba, unsigned int len) { unsigned int granularity, alignment; sector_t end = lba + len; granularity = scsi_debug_unmap_granularity; alignment = granularity - scsi_debug_unmap_alignment; while (lba < end) { sector_t block, rem; block = lba + alignment; rem = do_div(block, granularity); if (rem == 0 && lba + granularity < end && block < map_size) { clear_bit(block, map_storep); if (scsi_debug_lbprz) memset(fake_storep + block * scsi_debug_sector_size, 0, scsi_debug_sector_size); } lba += granularity - rem; } } static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba, unsigned int num, struct sdebug_dev_info *devip, u32 ei_lba) { unsigned long iflags; int ret; ret = check_device_access_params(devip, lba, num); if (ret) return ret; /* 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) { mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, prot_ret); return illegal_condition_result; } } write_lock_irqsave(&atomic_rw, iflags); ret = do_device_access(SCpnt, devip, lba, num, 1); if (scsi_debug_unmap_granularity) 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)) printk(KERN_INFO "scsi_debug: write: cdb indicated=%u, " " IO sent=%d bytes\n", num * scsi_debug_sector_size, ret); return 0; } static int resp_write_same(struct scsi_cmnd *scmd, unsigned long long lba, unsigned int num, struct sdebug_dev_info *devip, u32 ei_lba, unsigned int unmap) { unsigned long iflags; unsigned long long i; int ret; ret = check_device_access_params(devip, lba, num); if (ret) return ret; if (num > scsi_debug_write_same_length) { mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } write_lock_irqsave(&atomic_rw, iflags); if (unmap && scsi_debug_unmap_granularity) { 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)) printk(KERN_INFO "scsi_debug: write same: cdb indicated=%u, " " IO sent=%d bytes\n", 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_unmap_granularity) 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; ret = check_readiness(scmd, 1, 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]; 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(devip, lba, num); if (ret) goto out; unmap_region(lba, num); } ret = 0; out: 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; u