| /* |
| * 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 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| * |
| * Copyright (C) 2001 - 2018 Douglas Gilbert |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2, or (at your option) |
| * any later version. |
| * |
| * For documentation see http://sg.danny.cz/sg/sdebug26.html |
| * |
| */ |
| |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ |
| |
| #include <linux/module.h> |
| |
| #include <linux/kernel.h> |
| #include <linux/errno.h> |
| #include <linux/jiffies.h> |
| #include <linux/slab.h> |
| #include <linux/types.h> |
| #include <linux/string.h> |
| #include <linux/genhd.h> |
| #include <linux/fs.h> |
| #include <linux/init.h> |
| #include <linux/proc_fs.h> |
| #include <linux/vmalloc.h> |
| #include <linux/moduleparam.h> |
| #include <linux/scatterlist.h> |
| #include <linux/blkdev.h> |
| #include <linux/crc-t10dif.h> |
| #include <linux/spinlock.h> |
| #include <linux/interrupt.h> |
| #include <linux/atomic.h> |
| #include <linux/hrtimer.h> |
| #include <linux/uuid.h> |
| #include <linux/t10-pi.h> |
| |
| #include <net/checksum.h> |
| |
| #include <asm/unaligned.h> |
| |
| #include <scsi/scsi.h> |
| #include <scsi/scsi_cmnd.h> |
| #include <scsi/scsi_device.h> |
| #include <scsi/scsi_host.h> |
| #include <scsi/scsicam.h> |
| #include <scsi/scsi_eh.h> |
| #include <scsi/scsi_tcq.h> |
| #include <scsi/scsi_dbg.h> |
| |
| #include "sd.h" |
| #include "scsi_logging.h" |
| |
| /* make sure inq_product_rev string corresponds to this version */ |
| #define SDEBUG_VERSION "0188" /* format to fit INQUIRY revision field */ |
| static const char *sdebug_version_date = "20180128"; |
| |
| #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 LBA_OUT_OF_RANGE 0x21 |
| #define INVALID_FIELD_IN_CDB 0x24 |
| #define INVALID_FIELD_IN_PARAM_LIST 0x26 |
| #define UA_RESET_ASC 0x29 |
| #define UA_CHANGED_ASC 0x2a |
| #define TARGET_CHANGED_ASC 0x3f |
| #define LUNS_CHANGED_ASCQ 0x0e |
| #define INSUFF_RES_ASC 0x55 |
| #define INSUFF_RES_ASCQ 0x3 |
| #define POWER_ON_RESET_ASCQ 0x0 |
| #define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */ |
| #define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */ |
| #define CAPACITY_CHANGED_ASCQ 0x9 |
| #define SAVING_PARAMS_UNSUP 0x39 |
| #define TRANSPORT_PROBLEM 0x4b |
| #define THRESHOLD_EXCEEDED 0x5d |
| #define LOW_POWER_COND_ON 0x5e |
| #define MISCOMPARE_VERIFY_ASC 0x1d |
| #define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */ |
| #define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16 |
| #define WRITE_ERROR_ASC 0xc |
| |
| /* 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_CDB_LEN 10 |
| #define DEF_JDELAY 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 1024 |
| #define DEF_PHYSBLK_EXP 0 |
| #define DEF_OPT_XFERLEN_EXP 0 |
| #define DEF_PTYPE TYPE_DISK |
| #define DEF_REMOVABLE false |
| #define DEF_SCSI_LEVEL 7 /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */ |
| #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 |
| #define DEF_STRICT 0 |
| #define DEF_STATISTICS false |
| #define DEF_SUBMIT_QUEUES 1 |
| #define DEF_UUID_CTL 0 |
| #define JDELAY_OVERRIDDEN -9999 |
| |
| #define SDEBUG_LUN_0_VAL 0 |
| |
| /* bit mask values for sdebug_opts */ |
| #define SDEBUG_OPT_NOISE 1 |
| #define SDEBUG_OPT_MEDIUM_ERR 2 |
| #define SDEBUG_OPT_TIMEOUT 4 |
| #define SDEBUG_OPT_RECOVERED_ERR 8 |
| #define SDEBUG_OPT_TRANSPORT_ERR 16 |
| #define SDEBUG_OPT_DIF_ERR 32 |
| #define SDEBUG_OPT_DIX_ERR 64 |
| #define SDEBUG_OPT_MAC_TIMEOUT 128 |
| #define SDEBUG_OPT_SHORT_TRANSFER 0x100 |
| #define SDEBUG_OPT_Q_NOISE 0x200 |
| #define SDEBUG_OPT_ALL_TSF 0x400 |
| #define SDEBUG_OPT_RARE_TSF 0x800 |
| #define SDEBUG_OPT_N_WCE 0x1000 |
| #define SDEBUG_OPT_RESET_NOISE 0x2000 |
| #define SDEBUG_OPT_NO_CDB_NOISE 0x4000 |
| #define SDEBUG_OPT_HOST_BUSY 0x8000 |
| #define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \ |
| SDEBUG_OPT_RESET_NOISE) |
| #define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \ |
| SDEBUG_OPT_TRANSPORT_ERR | \ |
| SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \ |
| SDEBUG_OPT_SHORT_TRANSFER | \ |
| SDEBUG_OPT_HOST_BUSY) |
| /* When "every_nth" > 0 then modulo "every_nth" commands: |
| * - a missing response is simulated if SDEBUG_OPT_TIMEOUT is set |
| * - a RECOVERED_ERROR is simulated on successful read and write |
| * commands if SDEBUG_OPT_RECOVERED_ERR is set. |
| * - a TRANSPORT_ERROR is simulated on successful read and write |
| * commands if SDEBUG_OPT_TRANSPORT_ERR is set. |
| * |
| * When "every_nth" < 0 then after "- every_nth" commands: |
| * - a missing response is simulated if SDEBUG_OPT_TIMEOUT is set |
| * - a RECOVERED_ERROR is simulated on successful read and write |
| * commands if SDEBUG_OPT_RECOVERED_ERR is set. |
| * - a TRANSPORT_ERROR is simulated on successful read and write |
| * commands if _DEBUG_OPT_TRANSPORT_ERR is set. |
| * This will continue on every subsequent command 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_UA_CAPACITY_CHANGED 3 |
| #define SDEBUG_UA_LUNS_CHANGED 4 |
| #define SDEBUG_UA_MICROCODE_CHANGED 5 /* simulate firmware change */ |
| #define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 6 |
| #define SDEBUG_NUM_UAS 7 |
| |
| /* when 1==SDEBUG_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 |
| |
| /* SDEBUG_CANQUEUE is the maximum number of commands that can be queued |
| * (for response) per submit queue at one time. Can be reduced by max_queue |
| * option. Command responses are not queued when jdelay=0 and ndelay=0. The |
| * per-device DEF_CMD_PER_LUN can be changed via sysfs: |
| * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth |
| * but cannot exceed SDEBUG_CANQUEUE . |
| */ |
| #define SDEBUG_CANQUEUE_WORDS 3 /* a WORD is bits in a long */ |
| #define SDEBUG_CANQUEUE (SDEBUG_CANQUEUE_WORDS * BITS_PER_LONG) |
| #define DEF_CMD_PER_LUN 255 |
| |
| #define F_D_IN 1 |
| #define F_D_OUT 2 |
| #define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */ |
| #define F_D_UNKN 8 |
| #define F_RL_WLUN_OK 0x10 |
| #define F_SKIP_UA 0x20 |
| #define F_DELAY_OVERR 0x40 |
| #define F_SA_LOW 0x80 /* cdb byte 1, bits 4 to 0 */ |
| #define F_SA_HIGH 0x100 /* as used by variable length cdbs */ |
| #define F_INV_OP 0x200 |
| #define F_FAKE_RW 0x400 |
| #define F_M_ACCESS 0x800 /* media access */ |
| #define F_SSU_DELAY 0x1000 |
| #define F_SYNC_DELAY 0x2000 |
| |
| #define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR) |
| #define FF_MEDIA_IO (F_M_ACCESS | F_FAKE_RW) |
| #define FF_SA (F_SA_HIGH | F_SA_LOW) |
| #define F_LONG_DELAY (F_SSU_DELAY | F_SYNC_DELAY) |
| |
| #define SDEBUG_MAX_PARTS 4 |
| |
| #define SDEBUG_MAX_CMD_LEN 32 |
| |
| |
| struct sdebug_dev_info { |
| struct list_head dev_list; |
| unsigned int channel; |
| unsigned int target; |
| u64 lun; |
| uuid_t lu_name; |
| struct sdebug_host_info *sdbg_host; |
| unsigned long uas_bm[1]; |
| atomic_t num_in_q; |
| atomic_t stopped; |
| bool 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) |
| |
| enum sdeb_defer_type {SDEB_DEFER_NONE = 0, SDEB_DEFER_HRT = 1, |
| SDEB_DEFER_WQ = 2}; |
| |
| struct sdebug_defer { |
| struct hrtimer hrt; |
| struct execute_work ew; |
| int sqa_idx; /* index of sdebug_queue array */ |
| int qc_idx; /* index of sdebug_queued_cmd array within sqa_idx */ |
| int issuing_cpu; |
| bool init_hrt; |
| bool init_wq; |
| enum sdeb_defer_type defer_t; |
| }; |
| |
| struct sdebug_queued_cmd { |
| /* corresponding bit set in in_use_bm[] in owning struct sdebug_queue |
| * instance indicates this slot is in use. |
| */ |
| struct sdebug_defer *sd_dp; |
| struct scsi_cmnd *a_cmnd; |
| unsigned int inj_recovered:1; |
| unsigned int inj_transport:1; |
| unsigned int inj_dif:1; |
| unsigned int inj_dix:1; |
| unsigned int inj_short:1; |
| unsigned int inj_host_busy:1; |
| }; |
| |
| struct sdebug_queue { |
| struct sdebug_queued_cmd qc_arr[SDEBUG_CANQUEUE]; |
| unsigned long in_use_bm[SDEBUG_CANQUEUE_WORDS]; |
| spinlock_t qc_lock; |
| atomic_t blocked; /* to temporarily stop more being queued */ |
| }; |
| |
| static atomic_t sdebug_cmnd_count; /* number of incoming commands */ |
| static atomic_t sdebug_completions; /* count of deferred completions */ |
| static atomic_t sdebug_miss_cpus; /* submission + completion cpus differ */ |
| static atomic_t sdebug_a_tsf; /* 'almost task set full' counter */ |
| |
| struct opcode_info_t { |
| u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff */ |
| /* for terminating element */ |
| u8 opcode; /* if num_attached > 0, preferred */ |
| u16 sa; /* service action */ |
| u32 flags; /* OR-ed set of SDEB_F_* */ |
| int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *); |
| const struct opcode_info_t *arrp; /* num_attached elements or NULL */ |
| u8 len_mask[16]; /* len_mask[0]-->cdb_len, then mask for cdb */ |
| /* 1 to min(cdb_len, 15); ignore cdb[15...] */ |
| }; |
| |
| /* SCSI opcodes (first byte of cdb) of interest mapped onto these indexes */ |
| enum sdeb_opcode_index { |
| SDEB_I_INVALID_OPCODE = 0, |
| SDEB_I_INQUIRY = 1, |
| SDEB_I_REPORT_LUNS = 2, |
| SDEB_I_REQUEST_SENSE = 3, |
| SDEB_I_TEST_UNIT_READY = 4, |
| SDEB_I_MODE_SENSE = 5, /* 6, 10 */ |
| SDEB_I_MODE_SELECT = 6, /* 6, 10 */ |
| SDEB_I_LOG_SENSE = 7, |
| SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */ |
| SDEB_I_READ = 9, /* 6, 10, 12, 16 */ |
| SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */ |
| SDEB_I_START_STOP = 11, |
| SDEB_I_SERV_ACT_IN_16 = 12, /* add ...SERV_ACT_IN_12 if needed */ |
| SDEB_I_SERV_ACT_OUT_16 = 13, /* add ...SERV_ACT_OUT_12 if needed */ |
| SDEB_I_MAINT_IN = 14, |
| SDEB_I_MAINT_OUT = 15, |
| SDEB_I_VERIFY = 16, /* 10 only */ |
| SDEB_I_VARIABLE_LEN = 17, /* READ(32), WRITE(32), WR_SCAT(32) */ |
| SDEB_I_RESERVE = 18, /* 6, 10 */ |
| SDEB_I_RELEASE = 19, /* 6, 10 */ |
| SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */ |
| SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */ |
| SDEB_I_ATA_PT = 22, /* 12, 16 */ |
| SDEB_I_SEND_DIAG = 23, |
| SDEB_I_UNMAP = 24, |
| SDEB_I_XDWRITEREAD = 25, /* 10 only */ |
| SDEB_I_WRITE_BUFFER = 26, |
| SDEB_I_WRITE_SAME = 27, /* 10, 16 */ |
| SDEB_I_SYNC_CACHE = 28, /* 10, 16 */ |
| SDEB_I_COMP_WRITE = 29, |
| SDEB_I_LAST_ELEMENT = 30, /* keep this last (previous + 1) */ |
| }; |
| |
| |
| static const unsigned char opcode_ind_arr[256] = { |
| /* 0x0; 0x0->0x1f: 6 byte cdbs */ |
| SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE, |
| 0, 0, 0, 0, |
| SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0, |
| 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE, |
| SDEB_I_RELEASE, |
| 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG, |
| SDEB_I_ALLOW_REMOVAL, 0, |
| /* 0x20; 0x20->0x3f: 10 byte cdbs */ |
| 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0, |
| SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY, |
| 0, 0, 0, 0, 0, SDEB_I_SYNC_CACHE, 0, 0, |
| 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0, |
| /* 0x40; 0x40->0x5f: 10 byte cdbs */ |
| 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0, |
| 0, 0, 0, SDEB_I_XDWRITEREAD, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE, |
| SDEB_I_RELEASE, |
| 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0, |
| /* 0x60; 0x60->0x7d are reserved, 0x7e is "extended cdb" */ |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, SDEB_I_VARIABLE_LEN, |
| /* 0x80; 0x80->0x9f: 16 byte cdbs */ |
| 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0, |
| SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0, 0, 0, 0, 0, |
| 0, SDEB_I_SYNC_CACHE, 0, SDEB_I_WRITE_SAME, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN_16, SDEB_I_SERV_ACT_OUT_16, |
| /* 0xa0; 0xa0->0xbf: 12 byte cdbs */ |
| SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN, |
| SDEB_I_MAINT_OUT, 0, 0, 0, |
| SDEB_I_READ, 0 /* SDEB_I_SERV_ACT_OUT_12 */, SDEB_I_WRITE, |
| 0 /* SDEB_I_SERV_ACT_IN_12 */, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, |
| /* 0xc0; 0xc0->0xff: vendor specific */ |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| }; |
| |
| /* |
| * The following "response" functions return the SCSI mid-level's 4 byte |
| * tuple-in-an-int. To handle commands with an IMMED bit, for a faster |
| * command completion, they can mask their return value with |
| * SDEG_RES_IMMED_MASK . |
| */ |
| #define SDEG_RES_IMMED_MASK 0x40000000 |
| |
| static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *); |
| static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *); |
| static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *); |
| static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *); |
| static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *); |
| static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *); |
| static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *); |
| static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *); |
| static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *); |
| static int resp_write_scat(struct scsi_cmnd *, struct sdebug_dev_info *); |
| static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *); |
| static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *); |
| static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *); |
| static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *); |
| static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *); |
| static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *); |
| static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *); |
| static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *); |
| static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *); |
| static int resp_xdwriteread_10(struct scsi_cmnd *, struct sdebug_dev_info *); |
| static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *); |
| static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *); |
| static int resp_sync_cache(struct scsi_cmnd *, struct sdebug_dev_info *); |
| |
| /* |
| * The following are overflow arrays for cdbs that "hit" the same index in |
| * the opcode_info_arr array. The most time sensitive (or commonly used) cdb |
| * should be placed in opcode_info_arr[], the others should be placed here. |
| */ |
| static const struct opcode_info_t msense_iarr[] = { |
| {0, 0x1a, 0, F_D_IN, NULL, NULL, |
| {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
| }; |
| |
| static const struct opcode_info_t mselect_iarr[] = { |
| {0, 0x15, 0, F_D_OUT, NULL, NULL, |
| {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
| }; |
| |
| static const struct opcode_info_t read_iarr[] = { |
| {0, 0x28, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(10) */ |
| {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0, |
| 0, 0, 0, 0} }, |
| {0, 0x8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL, /* READ(6) */ |
| {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
| {0, 0xa8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(12) */ |
| {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, |
| 0xc7, 0, 0, 0, 0} }, |
| }; |
| |
| static const struct opcode_info_t write_iarr[] = { |
| {0, 0x2a, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(10) */ |
| NULL, {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, |
| 0, 0, 0, 0, 0, 0} }, |
| {0, 0xa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(6) */ |
| NULL, {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0} }, |
| {0, 0xaa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(12) */ |
| NULL, {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 0xbf, 0xc7, 0, 0, 0, 0} }, |
| }; |
| |
| static const struct opcode_info_t sa_in_16_iarr[] = { |
| {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL, |
| {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0, 0xc7} }, /* GET LBA STATUS(16) */ |
| }; |
| |
| static const struct opcode_info_t vl_iarr[] = { /* VARIABLE LENGTH */ |
| {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_dt0, |
| NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0xb, 0xfa, |
| 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */ |
| {0, 0x7f, 0x11, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_scat, |
| NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x11, 0xf8, |
| 0, 0xff, 0xff, 0x0, 0x0} }, /* WRITE SCATTERED(32) */ |
| }; |
| |
| static const struct opcode_info_t maint_in_iarr[] = { /* MAINT IN */ |
| {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL, |
| {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, |
| 0xc7, 0, 0, 0, 0} }, /* REPORT SUPPORTED OPERATION CODES */ |
| {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL, |
| {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, |
| 0, 0} }, /* REPORTED SUPPORTED TASK MANAGEMENT FUNCTIONS */ |
| }; |
| |
| static const struct opcode_info_t write_same_iarr[] = { |
| {0, 0x93, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_write_same_16, NULL, |
| {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* WRITE SAME(16) */ |
| }; |
| |
| static const struct opcode_info_t reserve_iarr[] = { |
| {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */ |
| {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
| }; |
| |
| static const struct opcode_info_t release_iarr[] = { |
| {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */ |
| {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
| }; |
| |
| static const struct opcode_info_t sync_cache_iarr[] = { |
| {0, 0x91, 0, F_SYNC_DELAY | F_M_ACCESS, resp_sync_cache, NULL, |
| {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* SYNC_CACHE (16) */ |
| }; |
| |
| |
| /* This array is accessed via SDEB_I_* values. Make sure all are mapped, |
| * plus the terminating elements for logic that scans this table such as |
| * REPORT SUPPORTED OPERATION CODES. */ |
| static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEMENT + 1] = { |
| /* 0 */ |
| {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* unknown opcodes */ |
| {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
| {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL, /* INQUIRY */ |
| {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
| {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL, |
| {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, |
| 0, 0} }, /* REPORT LUNS */ |
| {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL, |
| {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
| {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */ |
| {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
| /* 5 */ |
| {ARRAY_SIZE(msense_iarr), 0x5a, 0, F_D_IN, /* MODE SENSE(10) */ |
| resp_mode_sense, msense_iarr, {10, 0xf8, 0xff, 0xff, 0, 0, 0, |
| 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, |
| {ARRAY_SIZE(mselect_iarr), 0x55, 0, F_D_OUT, /* MODE SELECT(10) */ |
| resp_mode_select, mselect_iarr, {10, 0xf1, 0, 0, 0, 0, 0, 0xff, |
| 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, |
| {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL, /* LOG SENSE */ |
| {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, |
| 0, 0, 0} }, |
| {0, 0x25, 0, F_D_IN, resp_readcap, NULL, /* READ CAPACITY(10) */ |
| {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0, |
| 0, 0} }, |
| {ARRAY_SIZE(read_iarr), 0x88, 0, F_D_IN | FF_MEDIA_IO, /* READ(16) */ |
| resp_read_dt0, read_iarr, {16, 0xfe, 0xff, 0xff, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} }, |
| /* 10 */ |
| {ARRAY_SIZE(write_iarr), 0x8a, 0, F_D_OUT | FF_MEDIA_IO, |
| resp_write_dt0, write_iarr, /* WRITE(16) */ |
| {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} }, |
| {0, 0x1b, 0, F_SSU_DELAY, resp_start_stop, NULL,/* START STOP UNIT */ |
| {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
| {ARRAY_SIZE(sa_in_16_iarr), 0x9e, 0x10, F_SA_LOW | F_D_IN, |
| resp_readcap16, sa_in_16_iarr, /* SA_IN(16), READ CAPACITY(16) */ |
| {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0xff, 0x1, 0xc7} }, |
| {0, 0x9f, 0x12, F_SA_LOW | F_D_OUT | FF_MEDIA_IO, resp_write_scat, |
| NULL, {16, 0x12, 0xf9, 0x0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0xff, 0xc7} }, /* SA_OUT(16), WRITE SCAT(16) */ |
| {ARRAY_SIZE(maint_in_iarr), 0xa3, 0xa, F_SA_LOW | F_D_IN, |
| resp_report_tgtpgs, /* MAINT IN, REPORT TARGET PORT GROUPS */ |
| maint_in_iarr, {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff, |
| 0xff, 0, 0xc7, 0, 0, 0, 0} }, |
| /* 15 */ |
| {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */ |
| {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
| {0, 0x2f, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, NULL, NULL, /* VERIFY(10) */ |
| {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, |
| 0, 0, 0, 0, 0, 0} }, |
| {ARRAY_SIZE(vl_iarr), 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_MEDIA_IO, |
| resp_read_dt0, vl_iarr, /* VARIABLE LENGTH, READ(32) */ |
| {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x9, 0xfe, 0, 0xff, 0xff, |
| 0xff, 0xff} }, |
| {ARRAY_SIZE(reserve_iarr), 0x56, 0, F_D_OUT, |
| NULL, reserve_iarr, /* RESERVE(10) <no response function> */ |
| {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, |
| 0} }, |
| {ARRAY_SIZE(release_iarr), 0x57, 0, F_D_OUT, |
| NULL, release_iarr, /* RELEASE(10) <no response function> */ |
| {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, |
| 0} }, |
| /* 20 */ |
| {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */ |
| {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
| {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */ |
| {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
| {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */ |
| {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
| {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */ |
| {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
| {0, 0x42, 0, F_D_OUT | FF_MEDIA_IO, resp_unmap, NULL, /* UNMAP */ |
| {10, 0x1, 0, 0, 0, 0, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, |
| /* 25 */ |
| {0, 0x53, 0, F_D_IN | F_D_OUT | FF_MEDIA_IO, resp_xdwriteread_10, |
| NULL, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, |
| 0, 0, 0, 0, 0, 0} }, /* XDWRITEREAD(10) */ |
| {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL, |
| {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, |
| 0, 0, 0, 0} }, /* WRITE_BUFFER */ |
| {ARRAY_SIZE(write_same_iarr), 0x41, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, |
| resp_write_same_10, write_same_iarr, /* WRITE SAME(10) */ |
| {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, |
| 0, 0, 0, 0, 0} }, |
| {ARRAY_SIZE(sync_cache_iarr), 0x35, 0, F_SYNC_DELAY | F_M_ACCESS, |
| resp_sync_cache, sync_cache_iarr, |
| {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0, |
| 0, 0, 0, 0} }, /* SYNC_CACHE (10) */ |
| {0, 0x89, 0, F_D_OUT | FF_MEDIA_IO, resp_comp_write, NULL, |
| {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, |
| 0, 0xff, 0x3f, 0xc7} }, /* COMPARE AND WRITE */ |
| |
| /* 30 */ |
| {0xff, 0, 0, 0, NULL, NULL, /* terminating element */ |
| {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
| }; |
| |
| static int sdebug_add_host = DEF_NUM_HOST; |
| static int sdebug_ato = DEF_ATO; |
| static int sdebug_cdb_len = DEF_CDB_LEN; |
| static int sdebug_jdelay = DEF_JDELAY; /* if > 0 then unit is jiffies */ |
| static int sdebug_dev_size_mb = DEF_DEV_SIZE_MB; |
| static int sdebug_dif = DEF_DIF; |
| static int sdebug_dix = DEF_DIX; |
| static int sdebug_dsense = DEF_D_SENSE; |
| static int sdebug_every_nth = DEF_EVERY_NTH; |
| static int sdebug_fake_rw = DEF_FAKE_RW; |
| static unsigned int sdebug_guard = DEF_GUARD; |
| static int sdebug_lowest_aligned = DEF_LOWEST_ALIGNED; |
| static int sdebug_max_luns = DEF_MAX_LUNS; |
| static int sdebug_max_queue = SDEBUG_CANQUEUE; /* per submit queue */ |
| static unsigned int sdebug_medium_error_start = OPT_MEDIUM_ERR_ADDR; |
| static int sdebug_medium_error_count = OPT_MEDIUM_ERR_NUM; |
| static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */ |
| static int sdebug_ndelay = DEF_NDELAY; /* if > 0 then unit is nanoseconds */ |
| static int sdebug_no_lun_0 = DEF_NO_LUN_0; |
| static int sdebug_no_uld; |
| static int sdebug_num_parts = DEF_NUM_PARTS; |
| static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */ |
| static int sdebug_opt_blks = DEF_OPT_BLKS; |
| static int sdebug_opts = DEF_OPTS; |
| static int sdebug_physblk_exp = DEF_PHYSBLK_EXP; |
| static int sdebug_opt_xferlen_exp = DEF_OPT_XFERLEN_EXP; |
| static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */ |
| static int sdebug_scsi_level = DEF_SCSI_LEVEL; |
| static int sdebug_sector_size = DEF_SECTOR_SIZE; |
| static int sdebug_virtual_gb = DEF_VIRTUAL_GB; |
| static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO; |
| static unsigned int sdebug_lbpu = DEF_LBPU; |
| static unsigned int sdebug_lbpws = DEF_LBPWS; |
| static unsigned int sdebug_lbpws10 = DEF_LBPWS10; |
| static unsigned int sdebug_lbprz = DEF_LBPRZ; |
| static unsigned int sdebug_unmap_alignment = DEF_UNMAP_ALIGNMENT; |
| static unsigned int sdebug_unmap_granularity = DEF_UNMAP_GRANULARITY; |
| static unsigned int sdebug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS; |
| static unsigned int sdebug_unmap_max_desc = DEF_UNMAP_MAX_DESC; |
| static unsigned int sdebug_write_same_length = DEF_WRITESAME_LENGTH; |
| static int sdebug_uuid_ctl = DEF_UUID_CTL; |
| static bool sdebug_removable = DEF_REMOVABLE; |
| static bool sdebug_clustering; |
| static bool sdebug_host_lock = DEF_HOST_LOCK; |
| static bool sdebug_strict = DEF_STRICT; |
| static bool sdebug_any_injecting_opt; |
| static bool sdebug_verbose; |
| static bool have_dif_prot; |
| static bool write_since_sync; |
| static bool sdebug_statistics = DEF_STATISTICS; |
| |
| 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 */ |
| |
| static LIST_HEAD(sdebug_host_list); |
| static DEFINE_SPINLOCK(sdebug_host_list_lock); |
| |
| static unsigned char *fake_storep; /* ramdisk storage */ |
| static struct t10_pi_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 int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */ |
| static struct sdebug_queue *sdebug_q_arr; /* ptr to array of submit queues */ |
| |
| 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; |
| |
| |
| /* Only do the extra work involved in logical block provisioning if one or |
| * more of the lbpu, lbpws or lbpws10 parameters are given and we are doing |
| * real reads and writes (i.e. not skipping them for speed). |
| */ |
| static inline bool scsi_debug_lbp(void) |
| { |
| return 0 == sdebug_fake_rw && |
| (sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10); |
| } |
| |
| static void *fake_store(unsigned long long lba) |
| { |
| lba = do_div(lba, sdebug_store_sectors); |
| |
| return fake_storep + lba * sdebug_sector_size; |
| } |
| |
| static struct t10_pi_tuple *dif_store(sector_t sector) |
| { |
| sector = sector_div(sector, sdebug_store_sectors); |
| |
| return dif_storep + sector; |
| } |
| |
| 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) && |
| (sdebug_num_tgts > hpnt->this_id)) |
| hpnt->max_id = sdebug_num_tgts + 1; |
| else |
| hpnt->max_id = sdebug_num_tgts; |
| /* sdebug_max_luns; */ |
| hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1; |
| } |
| spin_unlock(&sdebug_host_list_lock); |
| } |
| |
| enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1}; |
| |
| /* Set in_bit to -1 to indicate no bit position of invalid field */ |
| static void mk_sense_invalid_fld(struct scsi_cmnd *scp, |
| enum sdeb_cmd_data c_d, |
| int in_byte, int in_bit) |
| { |
| unsigned char *sbuff; |
| u8 sks[4]; |
| int sl, asc; |
| |
| sbuff = scp->sense_buffer; |
| if (!sbuff) { |
| sdev_printk(KERN_ERR, scp->device, |
| "%s: sense_buffer is NULL\n", __func__); |
| return; |
| } |
| asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST; |
| memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE); |
| scsi_build_sense_buffer(sdebug_dsense, sbuff, ILLEGAL_REQUEST, asc, 0); |
| memset(sks, 0, sizeof(sks)); |
| sks[0] = 0x80; |
| if (c_d) |
| sks[0] |= 0x40; |
| if (in_bit >= 0) { |
| sks[0] |= 0x8; |
| sks[0] |= 0x7 & in_bit; |
| } |
| put_unaligned_be16(in_byte, sks + 1); |
| if (sdebug_dsense) { |
| sl = sbuff[7] + 8; |
| sbuff[7] = sl; |
| sbuff[sl] = 0x2; |
| sbuff[sl + 1] = 0x6; |
| memcpy(sbuff + sl + 4, sks, 3); |
| } else |
| memcpy(sbuff + 15, sks, 3); |
| if (sdebug_verbose) |
| sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq" |
| "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n", |
| my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit); |
| } |
| |
| 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(sdebug_dsense, sbuff, key, asc, asq); |
| |
| if (sdebug_verbose) |
| 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 mk_sense_invalid_opcode(struct scsi_cmnd *scp) |
| { |
| mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0); |
| } |
| |
| static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg) |
| { |
| if (sdebug_verbose) { |
| 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 void config_cdb_len(struct scsi_device *sdev) |
| { |
| switch (sdebug_cdb_len) { |
| case 6: /* suggest 6 byte READ, WRITE and MODE SENSE/SELECT */ |
| sdev->use_10_for_rw = false; |
| sdev->use_16_for_rw = false; |
| sdev->use_10_for_ms = false; |
| break; |
| case 10: /* suggest 10 byte RWs and 6 byte MODE SENSE/SELECT */ |
| sdev->use_10_for_rw = true; |
| sdev->use_16_for_rw = false; |
| sdev->use_10_for_ms = false; |
| break; |
| case 12: /* suggest 10 byte RWs and 10 byte MODE SENSE/SELECT */ |
| sdev->use_10_for_rw = true; |
| sdev->use_16_for_rw = false; |
| sdev->use_10_for_ms = true; |
| break; |
| case 16: |
| sdev->use_10_for_rw = false; |
| sdev->use_16_for_rw = true; |
| sdev->use_10_for_ms = true; |
| break; |
| case 32: /* No knobs to suggest this so same as 16 for now */ |
| sdev->use_10_for_rw = false; |
| sdev->use_16_for_rw = true; |
| sdev->use_10_for_ms = true; |
| break; |
| default: |
| pr_warn("unexpected cdb_len=%d, force to 10\n", |
| sdebug_cdb_len); |
| sdev->use_10_for_rw = true; |
| sdev->use_16_for_rw = false; |
| sdev->use_10_for_ms = false; |
| sdebug_cdb_len = 10; |
| break; |
| } |
| } |
| |
| static void all_config_cdb_len(void) |
| { |
| struct sdebug_host_info *sdbg_host; |
| struct Scsi_Host *shost; |
| struct scsi_device *sdev; |
| |
| spin_lock(&sdebug_host_list_lock); |
| list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { |
| shost = sdbg_host->shost; |
| shost_for_each_device(sdev, shost) { |
| config_cdb_len(sdev); |
| } |
| } |
| spin_unlock(&sdebug_host_list_lock); |
| } |
| |
| static void clear_luns_changed_on_target(struct sdebug_dev_info *devip) |
| { |
| struct sdebug_host_info *sdhp; |
| struct sdebug_dev_info *dp; |
| |
| spin_lock(&sdebug_host_list_lock); |
| list_for_each_entry(sdhp, &sdebug_host_list, host_list) { |
| list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) { |
| if ((devip->sdbg_host == dp->sdbg_host) && |
| (devip->target == dp->target)) |
| clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm); |
| } |
| } |
| spin_unlock(&sdebug_host_list_lock); |
| } |
| |
| static int make_ua(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) |
| { |
| int k; |
| |
| 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(scp, UNIT_ATTENTION, UA_RESET_ASC, |
| POWER_ON_RESET_ASCQ); |
| if (sdebug_verbose) |
| cp = "power on reset"; |
| break; |
| case SDEBUG_UA_BUS_RESET: |
| mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC, |
| BUS_RESET_ASCQ); |
| if (sdebug_verbose) |
| cp = "bus reset"; |
| break; |
| case SDEBUG_UA_MODE_CHANGED: |
| mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC, |
| MODE_CHANGED_ASCQ); |
| if (sdebug_verbose) |
| cp = "mode parameters changed"; |
| break; |
| case SDEBUG_UA_CAPACITY_CHANGED: |
| mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC, |
| CAPACITY_CHANGED_ASCQ); |
| if (sdebug_verbose) |
| cp = "capacity data changed"; |
| break; |
| case SDEBUG_UA_MICROCODE_CHANGED: |
| mk_sense_buffer(scp, UNIT_ATTENTION, |
| TARGET_CHANGED_ASC, |
| MICROCODE_CHANGED_ASCQ); |
| if (sdebug_verbose) |
| cp = "microcode has been changed"; |
| break; |
| case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET: |
| mk_sense_buffer(scp, UNIT_ATTENTION, |
| TARGET_CHANGED_ASC, |
| MICROCODE_CHANGED_WO_RESET_ASCQ); |
| if (sdebug_verbose) |
| cp = "microcode has been changed without reset"; |
| break; |
| case SDEBUG_UA_LUNS_CHANGED: |
| /* |
| * SPC-3 behavior is to report a UNIT ATTENTION with |
| * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN |
| * on the target, until a REPORT LUNS command is |
| * received. SPC-4 behavior is to report it only once. |
| * NOTE: sdebug_scsi_level does not use the same |
| * values as struct scsi_device->scsi_level. |
| */ |
| if (sdebug_scsi_level >= 6) /* SPC-4 and above */ |
| clear_luns_changed_on_target(devip); |
| mk_sense_buffer(scp, UNIT_ATTENTION, |
| TARGET_CHANGED_ASC, |
| LUNS_CHANGED_ASCQ); |
| if (sdebug_verbose) |
| cp = "reported luns data has changed"; |
| break; |
| default: |
| pr_warn("unexpected unit attention code=%d\n", k); |
| if (sdebug_verbose) |
| cp = "unknown"; |
| break; |
| } |
| clear_bit(k, devip->uas_bm); |
| if (sdebug_verbose) |
| sdev_printk(KERN_INFO, scp->device, |
| "%s reports: Unit attention: %s\n", |
| my_name, cp); |
| return check_condition_result; |
| } |
| return 0; |
| } |
| |
| /* Build SCSI "data-in" buffer. Returns 0 if ok else (DID_ERROR << 16). */ |
| 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; |
| } |
| |
| /* Partial build of SCSI "data-in" buffer. Returns 0 if ok else |
| * (DID_ERROR << 16). Can write to offset in data-in buffer. If multiple |
| * calls, not required to write in ascending offset order. Assumes resid |
| * set to scsi_bufflen() prior to any calls. |
| */ |
| static int p_fill_from_dev_buffer(struct scsi_cmnd *scp, const void *arr, |
| int arr_len, unsigned int off_dst) |
| { |
| int act_len, n; |
| struct scsi_data_buffer *sdb = scsi_in(scp); |
| off_t skip = off_dst; |
| |
| if (sdb->length <= off_dst) |
| return 0; |
| if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE)) |
| return DID_ERROR << 16; |
| |
| act_len = sg_pcopy_from_buffer(sdb->table.sgl, sdb->table.nents, |
| arr, arr_len, skip); |
| pr_debug("%s: off_dst=%u, scsi_bufflen=%u, act_len=%u, resid=%d\n", |
| __func__, off_dst, scsi_bufflen(scp), act_len, sdb->resid); |
| n = (int)scsi_bufflen(scp) - ((int)off_dst + act_len); |
| sdb->resid = min(sdb->resid, n); |
| return 0; |
| } |
| |
| /* Fetches from SCSI "data-out" buffer. 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 char sdebug_inq_vendor_id[9] = "Linux "; |
| static char sdebug_inq_product_id[17] = "scsi_debug "; |
| static char sdebug_inq_product_rev[5] = SDEBUG_VERSION; |
| /* Use some locally assigned NAAs for SAS addresses. */ |
| static const u64 naa3_comp_a = 0x3222222000000000ULL; |
| static const u64 naa3_comp_b = 0x3333333000000000ULL; |
| static const u64 naa3_comp_c = 0x3111111000000000ULL; |
| |
| /* Device identification VPD page. Returns number of bytes placed in arr */ |
| static int inquiry_vpd_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, |
| const uuid_t *lu_name) |
| { |
| 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], sdebug_inq_vendor_id, 8); |
| memcpy(&arr[12], sdebug_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) { |
| if (sdebug_uuid_ctl) { |
| /* Locally assigned UUID */ |
| arr[num++] = 0x1; /* binary (not necessarily sas) */ |
| arr[num++] = 0xa; /* PIV=0, lu, naa */ |
| arr[num++] = 0x0; |
| arr[num++] = 0x12; |
| arr[num++] = 0x10; /* uuid type=1, locally assigned */ |
| arr[num++] = 0x0; |
| memcpy(arr + num, lu_name, 16); |
| num += 16; |
| } else { |
| /* NAA-3, Logical unit identifier (binary) */ |
| arr[num++] = 0x1; /* binary (not necessarily sas) */ |
| arr[num++] = 0x3; /* PIV=0, lu, naa */ |
| arr[num++] = 0x0; |
| arr[num++] = 0x8; |
| put_unaligned_be64(naa3_comp_b + dev_id_num, arr + num); |
| num += 8; |
| } |
| /* 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-3, Target port identifier */ |
| arr[num++] = 0x61; /* proto=sas, binary */ |
| arr[num++] = 0x93; /* piv=1, target port, naa */ |
| arr[num++] = 0x0; |
| arr[num++] = 0x8; |
| put_unaligned_be64(naa3_comp_a + port_a, arr + num); |
| num += 8; |
| /* NAA-3, 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; |
| put_unaligned_be16(port_group_id, arr + num); |
| num += 2; |
| /* NAA-3, Target device identifier */ |
| arr[num++] = 0x61; /* proto=sas, binary */ |
| arr[num++] = 0xa3; /* piv=1, target device, naa */ |
| arr[num++] = 0x0; |
| arr[num++] = 0x8; |
| put_unaligned_be64(naa3_comp_a + target_dev_id, arr + num); |
| num += 8; |
| /* 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.32222220", 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_vpd_84(unsigned char *arr) |
| { |
| memcpy(arr, vpd84_data, sizeof(vpd84_data)); |
| return sizeof(vpd84_data); |
| } |
| |
| /* Management network addresses VPD page */ |
| static int inquiry_vpd_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_vpd_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 */ |
| put_unaligned_be64(naa3_comp_a + port_a, arr + num); |
| num += 8; |
| 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 */ |
| put_unaligned_be64(naa3_comp_a + port_b, arr + num); |
| num += 8; |
| |
| 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_vpd_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_vpd_b0(unsigned char *arr) |
| { |
| unsigned int gran; |
| |
| memcpy(arr, vpdb0_data, sizeof(vpdb0_data)); |
| |
| /* Optimal transfer length granularity */ |
| if (sdebug_opt_xferlen_exp != 0 && |
| sdebug_physblk_exp < sdebug_opt_xferlen_exp) |
| gran = 1 << sdebug_opt_xferlen_exp; |
| else |
| gran = 1 << sdebug_physblk_exp; |
| put_unaligned_be16(gran, arr + 2); |
| |
| /* Maximum Transfer Length */ |
| if (sdebug_store_sectors > 0x400) |
| put_unaligned_be32(sdebug_store_sectors, arr + 4); |
| |
| /* Optimal Transfer Length */ |
| put_unaligned_be32(sdebug_opt_blks, &arr[8]); |
| |
| if (sdebug_lbpu) { |
| /* Maximum Unmap LBA Count */ |
| put_unaligned_be32(sdebug_unmap_max_blocks, &arr[16]); |
| |
| /* Maximum Unmap Block Descriptor Count */ |
| put_unaligned_be32(sdebug_unmap_max_desc, &arr[20]); |
| } |
| |
| /* Unmap Granularity Alignment */ |
| if (sdebug_unmap_alignment) { |
| put_unaligned_be32(sdebug_unmap_alignment, &arr[28]); |
| arr[28] |= 0x80; /* UGAVALID */ |
| } |
| |
| /* Optimal Unmap Granularity */ |
| put_unaligned_be32(sdebug_unmap_granularity, &arr[24]); |
| |
| /* Maximum WRITE SAME Length */ |
| put_unaligned_be64(sdebug_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_vpd_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-4) */ |
| static int inquiry_vpd_b2(unsigned char *arr) |
| { |
| memset(arr, 0, 0x4); |
| arr[0] = 0; /* threshold exponent */ |
| if (sdebug_lbpu) |
| arr[1] = 1 << 7; |
| if (sdebug_lbpws) |
| arr[1] |= 1 << 6; |
| if (sdebug_lbpws10) |
| arr[1] |= 1 << 5; |
| if (sdebug_lbprz && scsi_debug_lbp()) |
| arr[1] |= (sdebug_lbprz & 0x7) << 2; /* sbc4r07 and later */ |
| /* anc_sup=0; dp=0 (no provisioning group descriptor) */ |
| /* minimum_percentage=0; provisioning_type=0 (unknown) */ |
| /* threshold_percentage=0 */ |
| return 0x4; |
| } |
| |
| #define SDEBUG_LONG_INQ_SZ 96 |
| #define SDEBUG_MAX_INQ_ARR_SZ 584 |
| |
| static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) |
| { |
| unsigned char pq_pdt; |
| unsigned char *arr; |
| unsigned char *cmd = scp->cmnd; |
| int alloc_len, n, ret; |
| bool have_wlun, is_disk; |
| |
| alloc_len = get_unaligned_be16(cmd + 3); |
| arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC); |
| if (! arr) |
| return DID_REQUEUE << 16; |
| is_disk = (sdebug_ptype == TYPE_DISK); |
| have_wlun = scsi_is_wlun(scp->device->lun); |
| if (have_wlun) |
| pq_pdt = TYPE_WLUN; /* present, wlun */ |
| else if (sdebug_no_lun_0 && (devip->lun == SDEBUG_LUN_0_VAL)) |
| pq_pdt = 0x7f; /* not present, PQ=3, PDT=0x1f */ |
| else |
| pq_pdt = (sdebug_ptype & 0x1f); |
| arr[0] = pq_pdt; |
| if (0x2 & cmd[1]) { /* CMDDT bit set */ |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1); |
| 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 (sdebug_vpd_use_hostno == 0) |
| host_no = 0; |
| lu_id_num = have_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 */ |
| if (is_disk) { /* SBC only */ |
| arr[n++] = 0x89; /* ATA information */ |
| arr[n++] = 0xb0; /* Block limits */ |
| arr[n++] = 0xb1; /* Block characteristics */ |
| arr[n++] = 0xb2; /* Logical Block Prov */ |
| } |
| 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_vpd_83(&arr[4], port_group_id, |
| target_dev_id, lu_id_num, |
| lu_id_str, len, |
| &devip->lu_name); |
| } else if (0x84 == cmd[2]) { /* Software interface ident. */ |
| arr[1] = cmd[2]; /*sanity */ |
| arr[3] = inquiry_vpd_84(&arr[4]); |
| } else if (0x85 == cmd[2]) { /* Management network addresses */ |
| arr[1] = cmd[2]; /*sanity */ |
| arr[3] = inquiry_vpd_85(&arr[4]); |
| } else if (0x86 == cmd[2]) { /* extended inquiry */ |
| arr[1] = cmd[2]; /*sanity */ |
| arr[3] = 0x3c; /* number of following entries */ |
| if (sdebug_dif == T10_PI_TYPE3_PROTECTION) |
| arr[4] = 0x4; /* SPT: GRD_CHK:1 */ |
| else if (have_dif_prot) |
| 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_vpd_88(&arr[4], target_dev_id); |
| } else if (is_disk && 0x89 == cmd[2]) { /* ATA information */ |
| arr[1] = cmd[2]; /*sanity */ |
| n = inquiry_vpd_89(&arr[4]); |
| put_unaligned_be16(n, arr + 2); |
| } else if (is_disk && 0xb0 == cmd[2]) { /* Block limits */ |
| arr[1] = cmd[2]; /*sanity */ |
| arr[3] = inquiry_vpd_b0(&arr[4]); |
| } else if (is_disk && 0xb1 == cmd[2]) { /* Block char. */ |
| arr[1] = cmd[2]; /*sanity */ |
| arr[3] = inquiry_vpd_b1(&arr[4]); |
| } else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */ |
| arr[1] = cmd[2]; /*sanity */ |
| arr[3] = inquiry_vpd_b2(&arr[4]); |
| } else { |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1); |
| kfree(arr); |
| return check_condition_result; |
| } |
| len = min(get_unaligned_be16(arr + 2) + 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] = sdebug_removable ? 0x80 : 0; /* Removable disk */ |
| arr[2] = sdebug_scsi_level; |
| arr[3] = 2; /* response_data_format==2 */ |
| arr[4] = SDEBUG_LONG_INQ_SZ - 5; |
| arr[5] = (int)have_dif_prot; /* PROTECT bit */ |
| if (sdebug_vpd_use_hostno == 0) |
| arr[5] |= 0x10; /* claim: implicit TPGS */ |
| arr[6] = 0x10; /* claim: MultiP */ |
| /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */ |
| arr[7] = 0xa; /* claim: LINKED + CMDQUE */ |
| memcpy(&arr[8], sdebug_inq_vendor_id, 8); |
| memcpy(&arr[16], sdebug_inq_product_id, 16); |
| memcpy(&arr[32], sdebug_inq_product_rev, 4); |
| /* Use Vendor Specific area to place driver date in ASCII hex */ |
| memcpy(&arr[36], sdebug_version_date, 8); |
| /* version descriptors (2 bytes each) follow */ |
| put_unaligned_be16(0xc0, arr + 58); /* SAM-6 no version claimed */ |
| put_unaligned_be16(0x5c0, arr + 60); /* SPC-5 no version claimed */ |
| n = 62; |
| if (is_disk) { /* SBC-4 no version claimed */ |
| put_unaligned_be16(0x600, arr + n); |
| n += 2; |
| } else if (sdebug_ptype == TYPE_TAPE) { /* SSC-4 rev 3 */ |
| put_unaligned_be16(0x525, arr + n); |
| n += 2; |
| } |
| put_unaligned_be16(0x2100, arr + n); /* SPL-4 no version claimed */ |
| ret = fill_from_dev_buffer(scp, arr, |
| min(alloc_len, SDEBUG_LONG_INQ_SZ)); |
| kfree(arr); |
| return ret; |
| } |
| |
| static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0, |
| 0, 0, 0x0, 0x0}; |
| |
| 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]; |
| bool dsense; |
| int len = 18; |
| |
| memset(arr, 0, sizeof(arr)); |
| dsense = !!(cmd[1] & 1); |
| sbuff = scp->sense_buffer; |
| if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) { |
| if (dsense) { |
| arr[0] = 0x72; |
| arr[1] = 0x0; /* NO_SENSE in sense_key */ |
| arr[2] = THRESHOLD_EXCEEDED; |
| arr[3] = 0xff; /* TEST set and MRIE==6 */ |
| len = 8; |
| } 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 (arr[0] >= 0x70 && dsense == sdebug_dsense) |
| ; /* have sense and formats match */ |
| else if (arr[0] <= 0x70) { |
| if (dsense) { |
| memset(arr, 0, 8); |
| arr[0] = 0x72; |
| len = 8; |
| } else { |
| memset(arr, 0, 18); |
| arr[0] = 0x70; |
| arr[7] = 0xa; |
| } |
| } else if (dsense) { |
| memset(arr, 0, 8); |
| arr[0] = 0x72; |
| arr[1] = sbuff[2]; /* sense key */ |
| arr[2] = sbuff[12]; /* asc */ |
| arr[3] = sbuff[13]; /* ascq */ |
| len = 8; |
| } else { |
| memset(arr, 0, 18); |
| arr[0] = 0x70; |
| arr[2] = sbuff[1]; |
| arr[7] = 0xa; |
| arr[12] = sbuff[1]; |
| arr[13] = sbuff[3]; |
| } |
| |
| } |
| 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, stop; |
| bool changing; |
| |
| power_cond = (cmd[4] & 0xf0) >> 4; |
| if (power_cond) { |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7); |
| return check_condition_result; |
| } |
| stop = !(cmd[4] & 1); |
| changing = atomic_read(&devip->stopped) == !stop; |
| atomic_xchg(&devip->stopped, stop); |
| if (!changing || cmd[1] & 0x1) /* state unchanged or IMMED set */ |
| return SDEG_RES_IMMED_MASK; |
| else |
| return 0; |
| } |
| |
| static sector_t get_sdebug_capacity(void) |
| { |
| static const unsigned int gibibyte = 1073741824; |
| |
| if (sdebug_virtual_gb > 0) |
| return (sector_t)sdebug_virtual_gb * |
| (gibibyte / sdebug_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; |
| |
| /* 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; |
| put_unaligned_be32(capac, arr + 0); |
| } else |
| put_unaligned_be32(0xffffffff, arr + 0); |
| put_unaligned_be16(sdebug_sector_size, arr + 6); |
| 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]; |
| int alloc_len; |
| |
| alloc_len = get_unaligned_be32(cmd + 10); |
| /* following just in case virtual_gb changed */ |
| sdebug_capacity = get_sdebug_capacity(); |
| memset(arr, 0, SDEBUG_READCAP16_ARR_SZ); |
| put_unaligned_be64((u64)(sdebug_capacity - 1), arr + 0); |
| put_unaligned_be32(sdebug_sector_size, arr + 8); |
| arr[13] = sdebug_physblk_exp & 0xf; |
| arr[14] = (sdebug_lowest_aligned >> 8) & 0x3f; |
| |
| if (scsi_debug_lbp()) { |
| arr[14] |= 0x80; /* LBPME */ |
| /* from sbc4r07, this LBPRZ field is 1 bit, but the LBPRZ in |
| * the LB Provisioning VPD page is 3 bits. Note that lbprz=2 |
| * in the wider field maps to 0 in this field. |
| */ |
| if (sdebug_lbprz & 1) /* precisely what the draft requires */ |
| arr[14] |= 0x40; |
| } |
| |
| arr[15] = sdebug_lowest_aligned & 0xff; |
| |
| if (have_dif_prot) { |
| arr[12] = (sdebug_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 = get_unaligned_be32(cmd + 6); |
| 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 (sdebug_vpd_use_hostno == 0) { |
| 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; /* only support active/optimized paths */ |
| } |
| put_unaligned_be16(port_group_a, arr + n); |
| n += 2; |
| 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 */ |
| put_unaligned_be16(port_a, arr + n); |
| n += 2; |
| arr[n++] = 3; /* Port unavailable */ |
| arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */ |
| put_unaligned_be16(port_group_b, arr + n); |
| n += 2; |
| 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 */ |
| put_unaligned_be16(port_b, arr + n); |
| n += 2; |
| |
| rlen = n - 4; |
| put_unaligned_be32(rlen, arr + 0); |
| |
| /* |
| * 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_rsup_opcodes(struct scsi_cmnd *scp, |
| struct sdebug_dev_info *devip) |
| { |
| bool rctd; |
| u8 reporting_opts, req_opcode, sdeb_i, supp; |
| u16 req_sa, u; |
| u32 alloc_len, a_len; |
| int k, offset, len, errsts, count, bump, na; |
| const struct opcode_info_t *oip; |
| const struct opcode_info_t *r_oip; |
| u8 *arr; |
| u8 *cmd = scp->cmnd; |
| |
| rctd = !!(cmd[2] & 0x80); |
| reporting_opts = cmd[2] & 0x7; |
| req_opcode = cmd[3]; |
| req_sa = get_unaligned_be16(cmd + 4); |
| alloc_len = get_unaligned_be32(cmd + 6); |
| if (alloc_len < 4 || alloc_len > 0xffff) { |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1); |
| return check_condition_result; |
| } |
| if (alloc_len > 8192) |
| a_len = 8192; |
| else |
| a_len = alloc_len; |
| arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC); |
| if (NULL == arr) { |
| mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, |
| INSUFF_RES_ASCQ); |
| return check_condition_result; |
| } |
| switch (reporting_opts) { |
| case 0: /* all commands */ |
| /* count number of commands */ |
| for (count = 0, oip = opcode_info_arr; |
| oip->num_attached != 0xff; ++oip) { |
| if (F_INV_OP & oip->flags) |
| continue; |
| count += (oip->num_attached + 1); |
| } |
| bump = rctd ? 20 : 8; |
| put_unaligned_be32(count * bump, arr); |
| for (offset = 4, oip = opcode_info_arr; |
| oip->num_attached != 0xff && offset < a_len; ++oip) { |
| if (F_INV_OP & oip->flags) |
| continue; |
| na = oip->num_attached; |
| arr[offset] = oip->opcode; |
| put_unaligned_be16(oip->sa, arr + offset + 2); |
| if (rctd) |
| arr[offset + 5] |= 0x2; |
| if (FF_SA & oip->flags) |
| arr[offset + 5] |= 0x1; |
| put_unaligned_be16(oip->len_mask[0], arr + offset + 6); |
| if (rctd) |
| put_unaligned_be16(0xa, arr + offset + 8); |
| r_oip = oip; |
| for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) { |
| if (F_INV_OP & oip->flags) |
| continue; |
| offset += bump; |
| arr[offset] = oip->opcode; |
| put_unaligned_be16(oip->sa, arr + offset + 2); |
| if (rctd) |
| arr[offset + 5] |= 0x2; |
| if (FF_SA & oip->flags) |
| arr[offset + 5] |= 0x1; |
| put_unaligned_be16(oip->len_mask[0], |
| arr + offset + 6); |
| if (rctd) |
| put_unaligned_be16(0xa, |
| arr + offset + 8); |
| } |
| oip = r_oip; |
| offset += bump; |
| } |
| break; |
| case 1: /* one command: opcode only */ |
| case 2: /* one command: opcode plus service action */ |
| case 3: /* one command: if sa==0 then opcode only else opcode+sa */ |
| sdeb_i = opcode_ind_arr[req_opcode]; |
| oip = &opcode_info_arr[sdeb_i]; |
| if (F_INV_OP & oip->flags) { |
| supp = 1; |
| offset = 4; |
| } else { |
| if (1 == reporting_opts) { |
| if (FF_SA & oip->flags) { |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, |
| 2, 2); |
| kfree(arr); |
| return check_condition_result; |
| } |
| req_sa = 0; |
| } else if (2 == reporting_opts && |
| 0 == (FF_SA & oip->flags)) { |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1); |
| kfree(arr); /* point at requested sa */ |
| return check_condition_result; |
| } |
| if (0 == (FF_SA & oip->flags) && |
| req_opcode == oip->opcode) |
| supp = 3; |
| else if (0 == (FF_SA & oip->flags)) { |
| na = oip->num_attached; |
| for (k = 0, oip = oip->arrp; k < na; |
| ++k, ++oip) { |
| if (req_opcode == oip->opcode) |
| break; |
| } |
| supp = (k >= na) ? 1 : 3; |
| } else if (req_sa != oip->sa) { |
| na = oip->num_attached; |
| for (k = 0, oip = oip->arrp; k < na; |
| ++k, ++oip) { |
| if (req_sa == oip->sa) |
| break; |
| } |
| supp = (k >= na) ? 1 : 3; |
| } else |
| supp = 3; |
| if (3 == supp) { |
| u = oip->len_mask[0]; |
| put_unaligned_be16(u, arr + 2); |
| arr[4] = oip->opcode; |
| for (k = 1; k < u; ++k) |
| arr[4 + k] = (k < 16) ? |
| oip->len_mask[k] : 0xff; |
| offset = 4 + u; |
| } else |
| offset = 4; |
| } |
| arr[1] = (rctd ? 0x80 : 0) | supp; |
| if (rctd) { |
| put_unaligned_be16(0xa, arr + offset); |
| offset += 12; |
| } |
| break; |
| default: |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2); |
| kfree(arr); |
| return check_condition_result; |
| } |
| offset = (offset < a_len) ? offset : a_len; |
| len = (offset < alloc_len) ? offset : alloc_len; |
| errsts = fill_from_dev_buffer(scp, arr, len); |
| kfree(arr); |
| return errsts; |
| } |
| |
| static int resp_rsup_tmfs(struct scsi_cmnd *scp, |
| struct sdebug_dev_info *devip) |
| { |
| bool repd; |
| u32 alloc_len, len; |
| u8 arr[16]; |
| u8 *cmd = scp->cmnd; |
| |
| memset(arr, 0, sizeof(arr)); |
| repd = !!(cmd[2] & 0x80); |
| alloc_len = get_unaligned_be32(cmd + 6); |
| if (alloc_len < 4) { |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1); |
| return check_condition_result; |
| } |
| arr[0] = 0xc8; /* ATS | ATSS | LURS */ |
| arr[1] = 0x1; /* ITNRS */ |
| if (repd) { |
| arr[3] = 0xc; |
| len = 16; |
| } else |
| len = 4; |
| |
| len = (len < alloc_len) ? len : alloc_len; |
| return fill_from_dev_buffer(scp, arr, len); |
| } |
| |
| /* <<Following mode page info copied from ST318451LW>> */ |
| |
| static int resp_err_recov_pg(unsigned char *p, int pcontrol, int target) |
| { /* Read-Write Error Recovery page for mode_sense */ |
| unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0, |
| 5, 0, 0xff, 0xff}; |
| |
| memcpy(p, err_recov_pg, sizeof(err_recov_pg)); |
| if (1 == pcontrol) |
| memset(p + 2, 0, sizeof(err_recov_pg) - 2); |
| return sizeof(err_recov_pg); |
| } |
| |
| static int resp_disconnect_pg(unsigned char *p, int pcontrol, int target) |
| { /* Disconnect-Reconnect page for mode_sense */ |
| unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0}; |
| |
| memcpy(p, disconnect_pg, sizeof(disconnect_pg)); |
| if (1 == pcontrol) |
| memset(p + 2, 0, sizeof(disconnect_pg) - 2); |
| return sizeof(disconnect_pg); |
| } |
| |
| static int resp_format_pg(unsigned char *p, int pcontrol, int target) |
| { /* Format device page for mode_sense */ |
| unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0x40, 0, 0, 0}; |
| |
| memcpy(p, format_pg, sizeof(format_pg)); |
| put_unaligned_be16(sdebug_sectors_per, p + 10); |
| put_unaligned_be16(sdebug_sector_size, p + 12); |
| if (sdebug_removable) |
| p[20] |= 0x20; /* should agree with INQUIRY */ |
| if (1 == pcontrol) |
| memset(p + 2, 0, sizeof(format_pg) - 2); |
| return sizeof(format_pg); |
| } |
| |
| 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 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 (SDEBUG_OPT_N_WCE & sdebug_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 unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, |
| 0, 0, 0x2, 0x4b}; |
| |
| 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 (sdebug_dsense) |
| ctrl_m_pg[2] |= 0x4; |
| else |
| ctrl_m_pg[2] &= ~0x4; |
| |
| if (sdebug_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, |
| 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ |
| 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ |
| 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, |
| 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ |
| 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ |
| 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; |
| |
| put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16); |
| put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24); |
| put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64); |
| put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72); |
| port_a = target_dev_id + 1; |
| port_b = port_a + 1; |
| memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg)); |
| put_unaligned_be32(port_a, p + 20); |
| put_unaligned_be32(port_b, p + 48 + 20); |
| 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, |
| struct sdebug_dev_info *devip) |
| { |
| int pcontrol, pcode, subpcode, bd_len; |
| unsigned char dev_spec; |
| int alloc_len, offset, len, target_dev_id; |
| int target = scp->device->id; |
| unsigned char *ap; |
| unsigned char arr[SDEBUG_MAX_MSENSE_SZ]; |
| unsigned char *cmd = scp->cmnd; |
| bool dbd, llbaa, msense_6, is_disk, bad_pcode; |
| |
| dbd = !!(cmd[1] & 0x8); /* disable block descriptors */ |
| pcontrol = (cmd[2] & 0xc0) >> 6; |
| pcode = cmd[2] & 0x3f; |
| subpcode = cmd[3]; |
| msense_6 = (MODE_SENSE == cmd[0]); |
| llbaa = msense_6 ? false : !!(cmd[1] & 0x10); |
| is_disk = (sdebug_ptype == TYPE_DISK); |
| if (is_disk && !dbd) |
| bd_len = llbaa ? 16 : 8; |
| else |
| bd_len = 0; |
| alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7); |
| 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; |
| /* for disks set DPOFUA bit and clear write protect (WP) bit */ |
| if (is_disk) |
| dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */ |
| 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) |
| put_unaligned_be32(0xffffffff, ap + 0); |
| else |
| put_unaligned_be32(sdebug_capacity, ap + 0); |
| put_unaligned_be16(sdebug_sector_size, ap + 6); |
| offset += bd_len; |
| ap = arr + offset; |
| } else if (16 == bd_len) { |
| put_unaligned_be64((u64)sdebug_capacity, ap + 0); |
| put_unaligned_be32(sdebug_sector_size, ap + 12); |
| offset += bd_len; |
| ap = arr + offset; |
| } |
| |
| if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) { |
| /* TODO: Control Extension page */ |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); |
| return check_condition_result; |
| } |
| bad_pcode = false; |
| |
| 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 */ |
| if (is_disk) { |
| len = resp_format_pg(ap, pcontrol, target); |
| offset += len; |
| } else |
| bad_pcode = true; |
| break; |
| case 0x8: /* Caching page, direct access */ |
| if (is_disk) { |
| len = resp_caching_pg(ap, pcontrol, target); |
| offset += len; |
| } else |
| bad_pcode = true; |
| 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_invalid_fld(scp, SDEB_IN_CDB, 3, -1); |
| 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); |
| if (is_disk) { |
| 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); |
| offset += len; |
| } else { |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); |
| return check_condition_result; |
| } |
| break; |
| default: |
| bad_pcode = true; |
| break; |
| } |
| if (bad_pcode) { |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5); |
| return check_condition_result; |
| } |
| if (msense_6) |
| arr[0] = offset - 1; |
| else |
| put_unaligned_be16((offset - 2), arr + 0); |
| 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, |
| struct sdebug_dev_info *devip) |
| { |
| int pf, sp, ps, md_len, bd_len, off, spf, pg_len; |
| int param_len, res, mpage; |
| unsigned char arr[SDEBUG_MAX_MSELECT_SZ]; |
| unsigned char *cmd = scp->cmnd; |
| int mselect6 = (MODE_SELECT == cmd[0]); |
| |
| memset(arr, 0, sizeof(arr)); |
| pf = cmd[1] & 0x10; |
| sp = cmd[1] & 0x1; |
| param_len = mselect6 ? cmd[4] : get_unaligned_be16(cmd + 7); |
| if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) { |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1); |
| return check_condition_result; |
| } |
| res = fetch_to_dev_buffer(scp, arr, param_len); |
| if (-1 == res) |
| return DID_ERROR << 16; |
| else if (sdebug_verbose && (res < param_len)) |
| 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) : (get_unaligned_be16(arr + 0) + 2); |
| bd_len = mselect6 ? arr[3] : get_unaligned_be16(arr + 6); |
| if (md_len > 2) { |
| mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1); |
| return check_condition_result; |
| } |
| off = bd_len + (mselect6 ? 4 : 8); |
| mpage = arr[off] & 0x3f; |
| ps = !!(arr[off] & 0x80); |
| if (ps) { |
| mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7); |
| return check_condition_result; |
| } |
| spf = !!(arr[off] & 0x40); |
| pg_len = spf ? (get_unaligned_be16(arr + off + 2) + 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); |
| sdebug_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_invalid_fld(scp, SDEB_IN_DATA, off, 5); |
| 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, pcode, subpcode, alloc_len, len, n; |
| unsigned char arr[SDEBUG_MAX_LSENSE_SZ]; |
| unsigned char *cmd = scp->cmnd; |
| |
| memset(arr, 0, sizeof(arr)); |
| ppc = cmd[1] & 0x2; |
| sp = cmd[1] & 0x1; |
| if (ppc || sp) { |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0); |
| return check_condition_result; |
| } |
| pcode = cmd[2] & 0x3f; |
| subpcode = cmd[3] & 0xff; |
| alloc_len = get_unaligned_be16(cmd + 7); |
| 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_invalid_fld(scp, SDEB_IN_CDB, 2, 5); |
| 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_invalid_fld(scp, SDEB_IN_CDB, 2, 5); |
| return check_condition_result; |
| } |
| } else { |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); |
| return check_condition_result; |
| } |
| len = min(get_unaligned_be16(arr + 2) + 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, LBA_OUT_OF_RANGE, 0); |
| return check_condition_result; |
| } |
| /* transfer length excessive (tie in to block limits VPD page) */ |
| if (num > sdebug_store_sectors) { |
| /* needs work to find which cdb byte 'num' comes from */ |
| 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, u32 sg_skip, u64 lba, |
| u32 num, bool do_write) |
| { |
| int ret; |
| u64 block, rest = 0; |
| struct scsi_data_buffer *sdb; |
| enum dma_data_direction dir; |
| |
| if (do_write) { |
| sdb = scsi_out(scmd); |
| dir = DMA_TO_DEVICE; |
| write_since_sync = true; |
| } else { |
| sdb = scsi_in(scmd); |
| dir = DMA_FROM_DEVICE; |
| } |
| |
| 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 = sg_copy_buffer(sdb->table.sgl, sdb->table.nents, |
| fake_storep + (block * sdebug_sector_size), |
| (num - rest) * sdebug_sector_size, sg_skip, do_write); |
| if (ret != (num - rest) * sdebug_sector_size) |
| return ret; |
| |
| if (rest) { |
| ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents, |
| fake_storep, rest * sdebug_sector_size, |
| sg_skip + ((num - rest) * sdebug_sector_size), |
| do_write); |
| } |
| |
| return ret; |
| } |
| |
| /* If fake_store(lba,num) compares equal to arr(num), then copy top half of |
| * arr into fake_store(lba,num) and return true. If comparison fails then |
| * return false. */ |
| static bool comp_write_worker(u64 lba, u32 num, const u8 *arr) |
| { |
| bool res; |
| u64 block, rest = 0; |
| u32 store_blks = sdebug_store_sectors; |
| u32 lb_size = sdebug_sector_size; |
| |
| block = do_div(lba, store_blks); |
| if (block + num > store_blks) |
| rest = block + num - store_blks; |
| |
| res = !memcmp(fake_storep + (block * lb_size), arr, |
| (num - rest) * lb_size); |
| if (!res) |
| return res; |
| if (rest) |
| res = memcmp(fake_storep, arr + ((num - rest) * lb_size), |
| rest * lb_size); |
| if (!res) |
| return res; |
| arr += num * lb_size; |
| memcpy(fake_storep + (block * lb_size), arr, (num - rest) * lb_size); |
| if (rest) |
| memcpy(fake_storep, arr + ((num - rest) * lb_size), |
| rest * lb_size); |
| return res; |
| } |
| |
| static __be16 dif_compute_csum(const void *buf, int len) |
| { |
| __be16 csum; |
| |
| if (sdebug_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 t10_pi_tuple *sdt, const void *data, |
| sector_t sector, u32 ei_lba) |
| { |
| __be16 csum = dif_compute_csum(data, sdebug_sector_size); |
| |
| if (sdt->guard_tag != csum) { |
| pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n", |
| (unsigned long)sector, |
| be16_to_cpu(sdt->guard_tag), |
| be16_to_cpu(csum)); |
| return 0x01; |
| } |
| if (sdebug_dif == T10_PI_TYPE1_PROTECTION && |
| be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) { |
| pr_err("REF check failed on sector %lu\n", |
| (unsigned long)sector); |
| return 0x03; |
| } |
| if (sdebug_dif == T10_PI_TYPE2_PROTECTION && |
| be32_to_cpu(sdt->ref_tag) != ei_lba) { |
| pr_err("REF check failed on sector %lu\n", |
| (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 t10_pi_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_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) |
| { |
| u8 *cmd = scp->cmnd; |
| struct sdebug_queued_cmd *sqcp; |
| u64 lba; |
| u32 num; |
| u32 ei_lba; |
| unsigned long iflags; |
| int ret; |
| bool check_prot; |
| |
| switch (cmd[0]) { |
| case READ_16: |
| ei_lba = 0; |
| lba = get_unaligned_be64(cmd + 2); |
| num = get_unaligned_be32(cmd + 10); |
| check_prot = true; |
| break; |
| case READ_10: |
| ei_lba = 0; |
| lba = get_unaligned_be32(cmd + 2); |
| num = get_unaligned_be16(cmd + 7); |
| check_prot = true; |
| break; |
| case READ_6: |
| ei_lba = 0; |
| lba = (u32)cmd[3] | (u32)cmd[2] << 8 | |
| (u32)(cmd[1] & 0x1f) << 16; |
| num = (0 == cmd[4]) ? 256 : cmd[4]; |
| check_prot = true; |
| break; |
| case READ_12: |
| ei_lba = 0; |
| lba = get_unaligned_be32(cmd + 2); |
| num = get_unaligned_be32(cmd + 6); |
| check_prot = true; |
| break; |
| case XDWRITEREAD_10: |
| ei_lba = 0; |
| lba = get_unaligned_be32(cmd + 2); |
| num = get_unaligned_be16(cmd + 7); |
| check_prot = false; |
| break; |
| default: /* assume READ(32) */ |
| lba = get_unaligned_be64(cmd + 12); |
| ei_lba = get_unaligned_be32(cmd + 20); |
| num = get_unaligned_be32(cmd + 28); |
| check_prot = false; |
| break; |
| } |
| if (unlikely(have_dif_prot && check_prot)) { |
| if (sdebug_dif == T10_PI_TYPE2_PROTECTION && |
| (cmd[1] & 0xe0)) { |
| mk_sense_invalid_opcode(scp); |
| return check_condition_result; |
| } |
| if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || |
| sdebug_dif == T10_PI_TYPE3_PROTECTION) && |
| (cmd[1] & 0xe0) == 0) |
| sdev_printk(KERN_ERR, scp->device, "Unprotected RD " |
| "to DIF device\n"); |
| } |
| if (unlikely(sdebug_any_injecting_opt)) { |
| sqcp = (struct sdebug_queued_cmd *)scp->host_scribble; |
| |
| if (sqcp) { |
| if (sqcp->inj_short) |
| num /= 2; |
| } |
| } else |
| sqcp = NULL; |
| |
| /* inline check_device_access_params() */ |
| if (unlikely(lba + num > sdebug_capacity)) { |
| mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); |
| return check_condition_result; |
| } |
| /* transfer length excessive (tie in to block limits VPD page) */ |
| if (unlikely(num > sdebug_store_sectors)) { |
| /* needs work to find which cdb byte 'num' comes from */ |
| mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); |
| return check_condition_result; |
| } |
| |
| if (unlikely((SDEBUG_OPT_MEDIUM_ERR & sdebug_opts) && |
| (lba <= (sdebug_medium_error_start + sdebug_medium_error_count - 1)) && |
| ((lba + num) > sdebug_medium_error_start))) { |
| /* claim unrecoverable read error */ |
| mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0); |
| /* set info field and valid bit for fixed descriptor */ |
| if (0x70 == (scp->sense_buffer[0] & 0x7f)) { |
| scp->sense_buffer[0] |= 0x80; /* Valid bit */ |
| ret = (lba < OPT_MEDIUM_ERR_ADDR) |
| ? OPT_MEDIUM_ERR_ADDR : (int)lba; |
| put_unaligned_be32(ret, scp->sense_buffer + 3); |
| } |
| scsi_set_resid(scp, scsi_bufflen(scp)); |
| return check_condition_result; |
| } |
| |
| read_lock_irqsave(&atomic_rw, iflags); |
| |
| /* DIX + T10 DIF */ |
| if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) { |
| int prot_ret = prot_verify_read(scp, lba, num, ei_lba); |
| |
| if (prot_ret) { |
| read_unlock_irqrestore(&atomic_rw, iflags); |
| mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, prot_ret); |
| return illegal_condition_result; |
| } |
| } |
| |
| ret = do_device_access(scp, 0, lba, num, false); |
| read_unlock_irqrestore(&atomic_rw, iflags); |
| if (unlikely(ret == -1)) |
| return DID_ERROR << 16; |
| |
| scsi_in(scp)->resid = scsi_bufflen(scp) - ret; |
| |
| if (unlikely(sqcp)) { |
| if (sqcp->inj_recovered) { |
| mk_sense_buffer(scp, RECOVERED_ERROR, |
| THRESHOLD_EXCEEDED, 0); |
| return check_condition_result; |
| } else if (sqcp->inj_transport) { |
| mk_sense_buffer(scp, ABORTED_COMMAND, |
| TRANSPORT_PROBLEM, ACK_NAK_TO); |
| return check_condition_result; |
| } else if (sqcp->inj_dif) { |
| /* Logical block guard check failed */ |
| mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); |
| return illegal_condition_result; |
| } else if (sqcp->inj_dix) { |
| mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); |
| return illegal_condition_result; |
| } |
| } |
| return 0; |
| } |
| |
| static 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 t10_pi_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 t10_pi_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, sdebug_sector_size); |
| goto out; |
| } |
| |
| sector++; |
| ei_lba++; |
| dpage_offset += sdebug_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 (sdebug_unmap_alignment) |
| lba += sdebug_unmap_granularity - sdebug_unmap_alignment; |
| sector_div(lba, sdebug_unmap_granularity); |
| return lba; |
| } |
| |
| static sector_t map_index_to_lba(unsigned long index) |
| { |
| sector_t lba = index * sdebug_unmap_granularity; |
| |
| if (sdebug_unmap_alignment) |
| lba -= sdebug_unmap_granularity - sdebug_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 + sdebug_unmap_granularity <= end && |
| index < map_size) { |
| clear_bit(index, map_storep); |
| if (sdebug_lbprz) { /* for LBPRZ=2 return 0xff_s */ |
| memset(fake_storep + |
| lba * sdebug_sector_size, |
| (sdebug_lbprz & 1) ? 0 : 0xff, |
| sdebug_sector_size * |
| sdebug_unmap_granularity); |
| } |
| if (dif_storep) { |
| memset(dif_storep + lba, 0xff, |
| sizeof(*dif_storep) * |
| sdebug_unmap_granularity); |
| } |
| } |
| lba = map_index_to_lba(index + 1); |
| } |
| } |
| |
| static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) |
| { |
| u8 *cmd = scp->cmnd; |
| u64 lba; |
| u32 num; |
| u32 ei_lba; |
| unsigned long iflags; |
| int ret; |
| bool check_prot; |
| |
| switch (cmd[0]) { |
| case WRITE_16: |
| ei_lba = 0; |
| lba = get_unaligned_be64(cmd + 2); |
| num = get_unaligned_be32(cmd + 10); |
| check_prot = true; |
| break; |
| case WRITE_10: |
| ei_lba = 0; |
| lba = get_unaligned_be32(cmd + 2); |
| num = get_unaligned_be16(cmd + 7); |
| check_prot = true; |
| break; |
| case WRITE_6: |
| ei_lba = 0; |
| lba = (u32)cmd[3] | (u32)cmd[2] << 8 | |
| (u32)(cmd[1] & 0x1f) << 16; |
| num = (0 == cmd[4]) ? 256 : cmd[4]; |
| check_prot = true; |
| break; |
| case WRITE_12: |
| ei_lba = 0; |
| lba = get_unaligned_be32(cmd + 2); |
| num = get_unaligned_be32(cmd + 6); |
| check_prot = true; |
| break; |
| case 0x53: /* XDWRITEREAD(10) */ |
| ei_lba = 0; |
| lba = get_unaligned_be32(cmd + 2); |
| num = get_unaligned_be16(cmd + 7); |
| check_prot = false; |
| break; |
| default: /* assume WRITE(32) */ |
| lba = get_unaligned_be64(cmd + 12); |
| ei_lba = get_unaligned_be32(cmd + 20); |
| num = get_unaligned_be32(cmd + 28); |
| check_prot = false; |
| break; |
| } |
| if (unlikely(have_dif_prot && check_prot)) { |
| if (sdebug_dif == T10_PI_TYPE2_PROTECTION && |
| (cmd[1] & 0xe0)) { |
| mk_sense_invalid_opcode(scp); |
| return check_condition_result; |
| } |
| if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || |
| sdebug_dif == T10_PI_TYPE3_PROTECTION) && |
| (cmd[1] & 0xe0) == 0) |
| sdev_printk(KERN_ERR, scp->device, "Unprotected WR " |
| "to DIF device\n"); |
| } |
| |
| /* inline check_device_access_params() */ |
| if (unlikely(lba + num > sdebug_capacity)) { |
| mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); |
| return check_condition_result; |
| } |
| /* transfer length excessive (tie in to block limits VPD page) */ |
| if (unlikely(num > sdebug_store_sectors)) { |
| /* needs work to find which cdb byte 'num' comes from */ |
| mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); |
| return check_condition_result; |
| } |
| |
| write_lock_irqsave(&atomic_rw, iflags); |
| |
| /* DIX + T10 DIF */ |
| if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) { |
| int prot_ret = prot_verify_write(scp, lba, num, ei_lba); |
| |
| if (prot_ret) { |
| write_unlock_irqrestore(&atomic_rw, iflags); |
| mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, prot_ret); |
| return illegal_condition_result; |
| } |
| } |
| |
| ret = do_device_access(scp, 0, lba, num, true); |
| if (unlikely(scsi_debug_lbp())) |
| map_region(lba, num); |
| write_unlock_irqrestore(&atomic_rw, iflags); |
| if (unlikely(-1 == ret)) |
| return DID_ERROR << 16; |
| else if (unlikely(sdebug_verbose && |
| (ret < (num * sdebug_sector_size)))) |
| sdev_printk(KERN_INFO, scp->device, |
| "%s: write: cdb indicated=%u, IO sent=%d bytes\n", |
| my_name, num * sdebug_sector_size, ret); |
| |
| if (unlikely(sdebug_any_injecting_opt)) { |
| struct sdebug_queued_cmd *sqcp = |
| (struct sdebug_queued_cmd *)scp->host_scribble; |
| |
| if (sqcp) { |
| if (sqcp->inj_recovered) { |
| mk_sense_buffer(scp, RECOVERED_ERROR, |
| THRESHOLD_EXCEEDED, 0); |
| return check_condition_result; |
| } else if (sqcp->inj_dif) { |
| /* Logical block guard check failed */ |
| mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); |
| return illegal_condition_result; |
| } else if (sqcp->inj_dix) { |
| mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); |
| return illegal_condition_result; |
| } |
| } |
| } |
| return 0; |
| } |
| |
| /* |
| * T10 has only specified WRITE SCATTERED(16) and WRITE SCATTERED(32). |
| * No READ GATHERED yet (requires bidi or long cdb holding gather list). |
| */ |
| static int resp_write_scat(struct scsi_cmnd *scp, |
| struct sdebug_dev_info *devip) |
| { |
| u8 *cmd = scp->cmnd; |
| u8 *lrdp = NULL; |
| u8 *up; |
| u8 wrprotect; |
| u16 lbdof, num_lrd, k; |
| u32 num, num_by, bt_len, lbdof_blen, sg_off, cum_lb; |
| u32 lb_size = sdebug_sector_size; |
| u32 ei_lba; |
| u64 lba; |
| unsigned long iflags; |
| int ret, res; |
| bool is_16; |
| static const u32 lrd_size = 32; /* + parameter list header size */ |
| |
| if (cmd[0] == VARIABLE_LENGTH_CMD) { |
| is_16 = false; |
| wrprotect = (cmd[10] >> 5) & 0x7; |
| lbdof = get_unaligned_be16(cmd + 12); |
| num_lrd = get_unaligned_be16(cmd + 16); |
| bt_len = get_unaligned_be32(cmd + 28); |
| } else { /* that leaves WRITE SCATTERED(16) */ |
| is_16 = true; |
| wrprotect = (cmd[2] >> 5) & 0x7; |
| lbdof = get_unaligned_be16(cmd + 4); |
| num_lrd = get_unaligned_be16(cmd + 8); |
| bt_len = get_unaligned_be32(cmd + 10); |
| if (unlikely(have_dif_prot)) { |
| if (sdebug_dif == T10_PI_TYPE2_PROTECTION && |
| wrprotect) { |
| mk_sense_invalid_opcode(scp); |
| return illegal_condition_result; |
| } |
| if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || |
| sdebug_dif == T10_PI_TYPE3_PROTECTION) && |
| wrprotect == 0) |
| sdev_printk(KERN_ERR, scp->device, |
| "Unprotected WR to DIF device\n"); |
| } |
| } |
| if ((num_lrd == 0) || (bt_len == 0)) |
| return 0; /* T10 says these do-nothings are not errors */ |
| if (lbdof == 0) { |
| if (sdebug_verbose) |
| sdev_printk(KERN_INFO, scp->device, |
| "%s: %s: LB Data Offset field bad\n", |
| my_name, __func__); |
| mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); |
| return illegal_condition_result; |
| } |
| lbdof_blen = lbdof * lb_size; |
| if ((lrd_size + (num_lrd * lrd_size)) > lbdof_blen) { |
| if (sdebug_verbose) |
| sdev_printk(KERN_INFO, scp->device, |
| "%s: %s: LBA range descriptors don't fit\n", |
| my_name, __func__); |
| mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); |
| return illegal_condition_result; |
| } |
| lrdp = kzalloc(lbdof_blen, GFP_ATOMIC); |
| if (lrdp == NULL) |
| return SCSI_MLQUEUE_HOST_BUSY; |
| if (sdebug_verbose) |
| sdev_printk(KERN_INFO, scp->device, |
| "%s: %s: Fetch header+scatter_list, lbdof_blen=%u\n", |
| my_name, __func__, lbdof_blen); |
| res = fetch_to_dev_buffer(scp, lrdp, lbdof_blen); |
| if (res == -1) { |
| ret = DID_ERROR << 16; |
| goto err_out; |
| } |
| |
| write_lock_irqsave(&atomic_rw, iflags); |
| sg_off = lbdof_blen; |
| /* Spec says Buffer xfer Length field in number of LBs in dout */ |
| cum_lb = 0; |
| for (k = 0, up = lrdp + lrd_size; k < num_lrd; ++k, up += lrd_size) { |
| lba = get_unaligned_be64(up + 0); |
| num = get_unaligned_be32(up + 8); |
| if (sdebug_verbose) |
| sdev_printk(KERN_INFO, scp->device, |
| "%s: %s: k=%d LBA=0x%llx num=%u sg_off=%u\n", |
| my_name, __func__, k, lba, num, sg_off); |
| if (num == 0) |
| continue; |
| ret = check_device_access_params(scp, lba, num); |
| if (ret) |
| goto err_out_unlock; |
| num_by = num * lb_size; |
| ei_lba = is_16 ? 0 : get_unaligned_be32(up + 12); |
| |
| if ((cum_lb + num) > bt_len) { |
| if (sdebug_verbose) |
| sdev_printk(KERN_INFO, scp->device, |
| "%s: %s: sum of blocks > data provided\n", |
| my_name, __func__); |
| mk_sense_buffer(scp, ILLEGAL_REQUEST, WRITE_ERROR_ASC, |
| 0); |
| ret = illegal_condition_result; |
| goto err_out_unlock; |
| } |
| |
| /* DIX + T10 DIF */ |
| if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) { |
| int prot_ret = prot_verify_write(scp, lba, num, |
| ei_lba); |
| |
| if (prot_ret) { |
| mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, |
| prot_ret); |
| ret = illegal_condition_result; |
| goto err_out_unlock; |
| } |
| } |
| |
| ret = do_device_access(scp, sg_off, lba, num, true); |
| if (unlikely(scsi_debug_lbp())) |
| map_region(lba, num); |
| if (unlikely(-1 == ret)) { |
| ret = DID_ERROR << 16; |
| goto err_out_unlock; |
| } else if (unlikely(sdebug_verbose && (ret < num_by))) |
| sdev_printk(KERN_INFO, scp->device, |
| "%s: write: cdb indicated=%u, IO sent=%d bytes\n", |
| my_name, num_by, ret); |
| |
| if (unlikely(sdebug_any_injecting_opt)) { |
| struct sdebug_queued_cmd *sqcp = |
| (struct sdebug_queued_cmd *)scp->host_scribble; |
| |
| if (sqcp) { |
| if (sqcp->inj_recovered) { |
| mk_sense_buffer(scp, RECOVERED_ERROR, |
| THRESHOLD_EXCEEDED, 0); |
| ret = illegal_condition_result; |
| goto err_out_unlock; |
| } else if (sqcp->inj_dif) { |
| /* Logical block guard check failed */ |
| mk_sense_buffer(scp, ABORTED_COMMAND, |
| 0x10, 1); |
| ret = illegal_condition_result; |
| goto err_out_unlock; |
| } else if (sqcp->inj_dix) { |
| mk_sense_buffer(scp, ILLEGAL_REQUEST, |
| 0x10, 1); |
| ret = illegal_condition_result; |
| goto err_out_unlock; |
| } |
| } |
| } |
| sg_off += num_by; |
| cum_lb += num; |
| } |
| ret = 0; |
| err_out_unlock: |
| write_unlock_irqrestore(&atomic_rw, iflags); |
| err_out: |
| kfree(lrdp); |
| return ret; |
| } |
| |
| static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num, |
| u32 ei_lba, bool unmap, bool ndob) |
| { |
| unsigned long iflags; |
| unsigned long long i; |
| int ret; |
| u64 lba_off; |
| |
| ret = check_device_access_params(scp, lba, num); |
| if (ret) |
| return ret; |
| |
| write_lock_irqsave(&atomic_rw, iflags); |
| |
| if (unmap && scsi_debug_lbp()) { |
| unmap_region(lba, num); |
| goto out; |
| } |
| |
| lba_off = lba * sdebug_sector_size; |
| /* if ndob then zero 1 logical block, else fetch 1 logical block */ |
| if (ndob) { |
| memset(fake_storep + lba_off, 0, sdebug_sector_size); |
| ret = 0; |
| } else |
| ret = fetch_to_dev_buffer(scp, fake_storep + lba_off, |
| sdebug_sector_size); |
| |
| if (-1 == ret) { |
| write_unlock_irqrestore(&atomic_rw, iflags); |
| return DID_ERROR << 16; |
| } else if (sdebug_verbose && !ndob && (ret < sdebug_sector_size)) |
| sdev_printk(KERN_INFO, scp->device, |
| "%s: %s: lb size=%u, IO sent=%d bytes\n", |
| my_name, "write same", |
| sdebug_sector_size, ret); |
| |
| /* Copy first sector to remaining blocks */ |
| for (i = 1 ; i < num ; i++) |
| memcpy(fake_storep + ((lba + i) * sdebug_sector_size), |
| fake_storep + lba_off, |
| sdebug_sector_size); |
| |
| if (scsi_debug_lbp()) |
| map_region(lba, num); |
| out: |
| write_unlock_irqrestore(&atomic_rw, iflags); |
| |
| return 0; |
| } |
| |
| static int resp_write_same_10(struct scsi_cmnd *scp, |
| struct sdebug_dev_info *devip) |
| { |
| u8 *cmd = scp->cmnd; |
| u32 lba; |
| u16 num; |
| u32 ei_lba = 0; |
| bool unmap = false; |
| |
| if (cmd[1] & 0x8) { |
| if (sdebug_lbpws10 == 0) { |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3); |
| return check_condition_result; |
| } else |
| unmap = true; |
| } |
| lba = get_unaligned_be32(cmd + 2); |
| num = get_unaligned_be16(cmd + 7); |
| if (num > sdebug_write_same_length) { |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1); |
| return check_condition_result; |
| } |
| return resp_write_same(scp, lba, num, ei_lba, unmap, false); |
| } |
| |
| static int resp_write_same_16(struct scsi_cmnd *scp, |
| struct sdebug_dev_info *devip) |
| { |
| u8 *cmd = scp->cmnd; |
| u64 lba; |
| u32 num; |
| u32 ei_lba = 0; |
| bool unmap = false; |
| bool ndob = false; |
| |
| if (cmd[1] & 0x8) { /* UNMAP */ |
| if (sdebug_lbpws == 0) { |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3); |
| return check_condition_result; |
| } else |
| unmap = true; |
| } |
| if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */ |
| ndob = true; |
| lba = get_unaligned_be64(cmd + 2); |
| num = get_unaligned_be32(cmd + 10); |
| if (num > sdebug_write_same_length) { |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1); |
| return check_condition_result; |
| } |
| return resp_write_same(scp, lba, num, ei_lba, unmap, ndob); |
| } |
| |
| /* Note the mode field is in the same position as the (lower) service action |
| * field. For the Report supported operation codes command, SPC-4 suggests |
| * each mode of this command should be reported separately; for future. */ |
| static int resp_write_buffer(struct scsi_cmnd *scp, |
| struct sdebug_dev_info *devip) |
| { |
| u8 *cmd = scp->cmnd; |
| struct scsi_device *sdp = scp->device; |
| struct sdebug_dev_info *dp; |
| u8 mode; |
| |
| mode = cmd[1] & 0x1f; |
| switch (mode) { |
| case 0x4: /* download microcode (MC) and activate (ACT) */ |
| /* set UAs on this device only */ |
| set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); |
| set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm); |
| break; |
| case 0x5: /* download MC, save and ACT */ |
| set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm); |
| break; |
| case 0x6: /* download MC with offsets and ACT */ |
| /* set UAs on most devices (LUs) in this target */ |
| list_for_each_entry(dp, |
| &devip->sdbg_host->dev_info_list, |
| dev_list) |
| if (dp->target == sdp->id) { |
| set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm); |
| if (devip != dp) |
| set_bit(SDEBUG_UA_MICROCODE_CHANGED, |
| dp->uas_bm); |
| } |
| break; |
| case 0x7: /* download MC with offsets, save, and ACT */ |
| /* set UA on all devices (LUs) in this target */ |
| list_for_each_entry(dp, |
| &devip->sdbg_host->dev_info_list, |
| dev_list) |
| if (dp->target == sdp->id) |
| set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, |
| dp->uas_bm); |
| break; |
| default: |
| /* do nothing for this command for other mode values */ |
| break; |
| } |
| return 0; |
| } |
| |
| static int resp_comp_write(struct scsi_cmnd *scp, |
| struct sdebug_dev_info *devip) |
| { |
| u8 *cmd = scp->cmnd; |
| u8 *arr; |
| u8 *fake_storep_hold; |
| u64 lba; |
| u32 dnum; |
| u32 lb_size = sdebug_sector_size; |
| u8 num; |
| unsigned long iflags; |
| int ret; |
| int retval = 0; |
| |
| lba = get_unaligned_be64(cmd + 2); |
| num = cmd[13]; /* 1 to a maximum of 255 logical blocks */ |
| if (0 == num) |
| return 0; /* degenerate case, not an error */ |
| if (sdebug_dif == T10_PI_TYPE2_PROTECTION && |
| (cmd[1] & 0xe0)) { |
| mk_sense_invalid_opcode(scp); |
| return check_condition_result; |
| } |
| if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || |
| sdebug_dif == T10_PI_TYPE3_PROTECTION) && |
| (cmd[1] & 0xe0) == 0) |
| sdev_printk(KERN_ERR, scp->device, "Unprotected WR " |
| "to DIF device\n"); |
| |
| /* inline check_device_access_params() */ |
| if (lba + num > sdebug_capacity) { |
| mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); |
| return check_condition_result; |
| } |
| /* transfer length excessive (tie in to block limits VPD page) */ |
| if (num > sdebug_store_sectors) { |
| /* needs work to find which cdb byte 'num' comes from */ |
| mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); |
| return check_condition_result; |
| } |
| dnum = 2 * num; |
| arr = kzalloc(dnum * lb_size, GFP_ATOMIC); |
| if (NULL == arr) { |
| mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, |
| INSUFF_RES_ASCQ); |
| return check_condition_result; |
| } |
| |
| write_lock_irqsave(&atomic_rw, iflags); |
| |
| /* trick do_device_access() to fetch both compare and write buffers |
| * from data-in into arr. Safe (atomic) since write_lock held. */ |
| fake_storep_hold = fake_storep; |
| fake_storep = arr; |
| ret = do_device_access(scp, 0, 0, dnum, true); |
| fake_storep = fake_storep_hold; |
| if (ret == -1) { |
| retval = DID_ERROR << 16; |
| goto cleanup; |
| } else if (sdebug_verbose && (ret < (dnum * lb_size))) |
| sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb " |
| "indicated=%u, IO sent=%d bytes\n", my_name, |
| dnum * lb_size, ret); |
| if (!comp_write_worker(lba, num, arr)) { |
| mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0); |
| retval = check_condition_result; |
| goto cleanup; |
| } |
| if (scsi_debug_lbp()) |
| map_region(lba, num); |
| cleanup: |
| write_unlock_irqrestore(&atomic_rw, iflags); |
| kfree(arr); |
| return retval; |
| } |
| |
| struct unmap_block_desc { |
| __be64 lba; |
| __be32 blocks; |
| __be32 __reserved; |
| }; |
| |
| static int resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) |
| { |
| unsigned char *buf; |
| struct unmap_block_desc *desc; |
| unsigned int i, payload_len, descriptors; |
| int ret; |
| unsigned long iflags; |
| |
| |
| if (!scsi_debug_lbp()) |
| return 0; /* fib and say its done */ |
| payload_len = get_unaligned_be16(scp->cmnd + 7); |
| BUG_ON(scsi_bufflen(scp) != payload_len); |
| |
| descriptors = (payload_len - 8) / 16; |
| if (descriptors > sdebug_unmap_max_desc) { |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1); |
| return check_condition_result; |
| } |
| |
| buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC); |
| if (!buf) { |
| mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, |
| INSUFF_RES_ASCQ); |
| return check_condition_result; |
| } |
| |
| scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp)); |
| |
| 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(scp, 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 *scp, |
| struct sdebug_dev_info *devip) |
| { |
| u8 *cmd = scp->cmnd; |
| u64 lba; |
| u32 alloc_len, mapped, num; |
| u8 arr[SDEBUG_GET_LBA_STATUS_LEN]; |
| int ret; |
| |
| lba = get_unaligned_be64(cmd + 2); |
| alloc_len = get_unaligned_be32(cmd + 10); |
| |
| if (alloc_len < 24) |
| return 0; |
| |
| ret = check_device_access_params(scp, lba, 1); |
| if (ret) |
| return ret; |
| |
| if (scsi_debug_lbp()) |
| mapped = map_state(lba, &num); |
| else { |
| mapped = 1; |
| /* following just in case virtual_gb changed */ |
| sdebug_capacity = get_sdebug_capacity(); |
| if (sdebug_capacity - lba <= 0xffffffff) |
| num = sdebug_capacity - lba; |
| else |
| num = 0xffffffff; |
| } |
| |
| memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN); |
| put_unaligned_be32(20, arr); /* Parameter Data Length */ |
| put_unaligned_be64(lba, arr + 8); /* LBA */ |
| put_unaligned_be32(num, arr + 16); /* Number of blocks */ |
| arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */ |
| |
| return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN); |
| } |
| |
| static int resp_sync_cache(struct scsi_cmnd *scp, |
| struct sdebug_dev_info *devip) |
| { |
| int res = 0; |
| u64 lba; |
| u32 num_blocks; |
| u8 *cmd = scp->cmnd; |
| |
| if (cmd[0] == SYNCHRONIZE_CACHE) { /* 10 byte cdb */ |
| lba = get_unaligned_be32(cmd + 2); |
| num_blocks = get_unaligned_be16(cmd + 7); |
| } else { /* SYNCHRONIZE_CACHE(16) */ |
| lba = get_unaligned_be64(cmd + 2); |
| num_blocks = get_unaligned_be32(cmd + 10); |
| } |
| if (lba + num_blocks > sdebug_capacity) { |
| mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); |
| return check_condition_result; |
| } |
| if (!write_since_sync || cmd[1] & 0x2) |
| res = SDEG_RES_IMMED_MASK; |
| else /* delay if write_since_sync and IMMED clear */ |
| write_since_sync = false; |
| return res; |
| } |
| |
| #define RL_BUCKET_ELEMS 8 |
| |
| /* Even though each pseudo target has a REPORT LUNS "well known logical unit" |
| * (W-LUN), the normal Linux scanning logic does not associate it with a |
| * device (e.g. /dev/sg7). The following magic will make that association: |
| * "cd /sys/class/scsi_host/host<n> ; echo '- - 49409' > scan" |
| * where <n> is a host number. If there are multiple targets in a host then |
| * the above will associate a W-LUN to each target. To only get a W-LUN |
| * for target 2, then use "echo '- 2 49409' > scan" . |
| */ |
| static int resp_report_luns(struct scsi_cmnd *scp, |
| struct sdebug_dev_info *devip) |
| { |
| unsigned char *cmd = scp->cmnd; |
| unsigned int alloc_len; |
| unsigned char select_report; |
| u64 lun; |
| struct scsi_lun *lun_p; |
| u8 arr[RL_BUCKET_ELEMS * sizeof(struct scsi_lun)]; |
| unsigned int lun_cnt; /* normal LUN count (max: 256) */ |
| unsigned int wlun_cnt; /* report luns W-LUN count */ |
| unsigned int tlun_cnt; /* total LUN count */ |
| unsigned int rlen; /* response length (in bytes) */ |
| int k, j, n, res; |
| unsigned int off_rsp = 0; |
| const int sz_lun = sizeof(struct scsi_lun); |
| |
| clear_luns_changed_on_target(devip); |
| |
| select_report = cmd[2]; |
| alloc_len = get_unaligned_be32(cmd + 6); |
| |
| if (alloc_len < 4) { |
| pr_err("alloc len too small %d\n", alloc_len); |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1); |
| return check_condition_result; |
| } |
| |
| switch (select_report) { |
| case 0: /* all LUNs apart from W-LUNs */ |
| lun_cnt = sdebug_max_luns; |
| wlun_cnt = 0; |
| break; |
| case 1: /* only W-LUNs */ |
| lun_cnt = 0; |
| wlun_cnt = 1; |
| break; |
| case 2: /* all LUNs */ |
| lun_cnt = sdebug_max_luns; |
| wlun_cnt = 1; |
| break; |
| case 0x10: /* only administrative LUs */ |
| case 0x11: /* see SPC-5 */ |
| case 0x12: /* only subsiduary LUs owned by referenced LU */ |
| default: |
| pr_debug("select report invalid %d\n", select_report); |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1); |
| return check_condition_result; |
| } |
| |
| if (sdebug_no_lun_0 && (lun_cnt > 0)) |
| --lun_cnt; |
| |
| tlun_cnt = lun_cnt + wlun_cnt; |
| rlen = tlun_cnt * sz_lun; /* excluding 8 byte header */ |
| scsi_set_resid(scp, scsi_bufflen(scp)); |
| pr_debug("select_report %d luns = %d wluns = %d no_lun0 %d\n", |
| select_report, lun_cnt, wlun_cnt, sdebug_no_lun_0); |
| |
| /* loops rely on sizeof response header same as sizeof lun (both 8) */ |
| lun = sdebug_no_lun_0 ? 1 : 0; |
| for (k = 0, j = 0, res = 0; true; ++k, j = 0) { |
| memset(arr, 0, sizeof(arr)); |
| lun_p = (struct scsi_lun *)&arr[0]; |
| if (k == 0) { |
| put_unaligned_be32(rlen, &arr[0]); |
| ++lun_p; |
| j = 1; |
| } |
| for ( ; j < RL_BUCKET_ELEMS; ++j, ++lun_p) { |
| if ((k * RL_BUCKET_ELEMS) + j > lun_cnt) |
| break; |
| int_to_scsilun(lun++, lun_p); |
| } |
| if (j < RL_BUCKET_ELEMS) |
| break; |
| n = j * sz_lun; |
| res = p_fill_from_dev_buffer(scp, arr, n, off_rsp); |
| if (res) |
| return res; |
| off_rsp += n; |
| } |
| if (wlun_cnt) { |
| int_to_scsilun(SCSI_W_LUN_REPORT_LUNS, lun_p); |
| ++j; |
| } |
| if (j > 0) |
| res = p_fill_from_dev_buffer(scp, arr, j * sz_lun, off_rsp); |
| return res; |
| } |
| |
| 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 = kzalloc(scsi_bufflen(scp), GFP_ATOMIC); |
| if (!buf) { |
| mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, |
| INSUFF_RES_ASCQ); |
| 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; |
| } |
| |
| static int resp_xdwriteread_10(struct scsi_cmnd *scp, |
| struct sdebug_dev_info *devip) |
| { |
| u8 *cmd = scp->cmnd; |
| u64 lba; |
| u32 num; |
| int errsts; |
| |
| if (!scsi_bidi_cmnd(scp)) { |
| mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, |
| INSUFF_RES_ASCQ); |
| return check_condition_result; |
| } |
| errsts = resp_read_dt0(scp, devip); |
| if (errsts) |
| return errsts; |
| if (!(cmd[1] & 0x4)) { /* DISABLE_WRITE is not set */ |
| errsts = resp_write_dt0(scp, devip); |
| if (errsts) |
| return errsts; |
| } |
| lba = get_unaligned_be32(cmd + 2); |
| num = get_unaligned_be16(cmd + 7); |
| return resp_xdwriteread(scp, lba, num, devip); |
| } |
| |
| static struct sdebug_queue *get_queue(struct scsi_cmnd *cmnd) |
| { |
| u32 tag = blk_mq_unique_tag(cmnd->request); |
| u16 hwq = blk_mq_unique_tag_to_hwq(tag); |
| |
| pr_debug("tag=%#x, hwq=%d\n", tag, hwq); |
| if (WARN_ON_ONCE(hwq >= submit_queues)) |
| hwq = 0; |
| return sdebug_q_arr + hwq; |
| } |
| |
| /* Queued (deferred) command completions converge here. */ |
| static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp) |
| { |
| int qc_idx; |
| int retiring = 0; |
| unsigned long iflags; |
| struct sdebug_queue *sqp; |
| struct sdebug_queued_cmd *sqcp; |
| struct scsi_cmnd *scp; |
| struct sdebug_dev_info *devip; |
| |
| sd_dp->defer_t = SDEB_DEFER_NONE; |
| qc_idx = sd_dp->qc_idx; |
| sqp = sdebug_q_arr + sd_dp->sqa_idx; |
| if (sdebug_statistics) { |
| atomic_inc(&sdebug_completions); |
| if (raw_smp_processor_id() != sd_dp->issuing_cpu) |
| atomic_inc(&sdebug_miss_cpus); |
| } |
| if (unlikely((qc_idx < 0) || (qc_idx >= SDEBUG_CANQUEUE))) { |
| pr_err("wild qc_idx=%d\n", qc_idx); |
| return; |
| } |
| spin_lock_irqsave(&sqp->qc_lock, iflags); |
| sqcp = &sqp->qc_arr[qc_idx]; |
| scp = sqcp->a_cmnd; |
| if (unlikely(scp == NULL)) { |
| spin_unlock_irqrestore(&sqp->qc_lock, iflags); |
| pr_err("scp is NULL, sqa_idx=%d, qc_idx=%d\n", |
| sd_dp->sqa_idx, qc_idx); |
| return; |
| } |
| devip = (struct sdebug_dev_info *)scp->device->hostdata; |
| if (likely(devip)) |
| atomic_dec(&devip->num_in_q); |
| else |
| pr_err("devip=NULL\n"); |
| if (unlikely(atomic_read(&retired_max_queue) > 0)) |
| retiring = 1; |
| |
| sqcp->a_cmnd = NULL; |
| if (unlikely(!test_and_clear_bit(qc_idx, sqp->in_use_bm))) { |
| spin_unlock_irqrestore(&sqp->qc_lock, iflags); |
| pr_err("Unexpected completion\n"); |
| return; |
| } |
| |
| if (unlikely(retiring)) { /* user has reduced max_queue */ |
| int k, retval; |
| |
| retval = atomic_read(&retired_max_queue); |
| if (qc_idx >= retval) { |
| spin_unlock_irqrestore(&sqp->qc_lock, iflags); |
| pr_err("index %d too large\n", retval); |
| return; |
| } |
| k = find_last_bit(sqp->in_use_bm, retval); |
| if ((k < sdebug_max_queue) || (k == retval)) |
| atomic_set(&retired_max_queue, 0); |
| else |
| atomic_set(&retired_max_queue, k + 1); |
| } |
| spin_unlock_irqrestore(&sqp->qc_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) |
| { |
| struct sdebug_defer *sd_dp = container_of(timer, struct sdebug_defer, |
| hrt); |
| sdebug_q_cmd_complete(sd_dp); |
| return HRTIMER_NORESTART; |
| } |
| |
| /* When work queue schedules work, it calls this function. */ |
| static void sdebug_q_cmd_wq_complete(struct work_struct *work) |
| { |
| struct sdebug_defer *sd_dp = container_of(work, struct sdebug_defer, |
| ew.work); |
| sdebug_q_cmd_complete(sd_dp); |
| } |
| |
| static bool got_shared_uuid; |
| static uuid_t shared_uuid; |
| |
| 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) { |
| if (sdebug_uuid_ctl == 1) |
| uuid_gen(&devip->lu_name); |
| else if (sdebug_uuid_ctl == 2) { |
| if (got_shared_uuid) |
| devip->lu_name = shared_uuid; |
| else { |
| uuid_gen(&shared_uuid); |
| got_shared_uuid = true; |
| devip->lu_name = shared_uuid; |
| } |
| } |
| devip->sdbg_host = sdbg_host; |
| list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list); |
| } |
| return devip; |
| } |
| |
| static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev) |
| { |
| struct sdebug_host_info *sdbg_host; |
| struct sdebug_dev_info *open_devip = NULL; |
| struct sdebug_dev_info *devip; |
| |
| sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host); |
| if (!sdbg_host) { |
| pr_err("Host info NULL\n"); |
| return NULL; |
| } |
| list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) { |
| if ((devip->used) && (devip->channel == sdev->channel) && |
| (devip->target == sdev->id) && |
| (devip->lun == sdev->lun)) |
| return devip; |
| else { |
| if ((!devip->used) && (!open_devip)) |
| open_devip = devip; |
| } |
| } |
| if (!open_devip) { /* try and make a new one */ |
| open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC); |
| if (!open_devip) { |
| pr_err("out of memory at line %d\n", __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 = true; |
| return open_devip; |
| } |
| |
| static int scsi_debug_slave_alloc(struct scsi_device *sdp) |
| { |
| if (sdebug_verbose) |
| pr_info("slave_alloc <%u %u %u %llu>\n", |
| sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); |
| blk_queue_flag_set(QUEUE_FLAG_BIDI, sdp->request_queue); |
| return 0; |
| } |
| |
| static int scsi_debug_slave_configure(struct scsi_device *sdp) |
| { |
| struct sdebug_dev_info *devip = |
| (struct sdebug_dev_info *)sdp->hostdata; |
| |
| if (sdebug_verbose) |
| pr_info("slave_configure <%u %u %u %llu>\n", |
| sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); |
| if (sdp->host->max_cmd_len != SDEBUG_MAX_CMD_LEN) |
| sdp->host->max_cmd_len = SDEBUG_MAX_CMD_LEN; |
| if (devip == NULL) { |
| devip = find_build_dev_info(sdp); |
| if (devip == NULL) |
| return 1; /* no resources, will be marked offline */ |
| } |
| sdp->hostdata = devip; |
| blk_queue_max_segment_size(sdp->request_queue, -1U); |
| if (sdebug_no_uld) |
| sdp->no_uld_attach = 1; |
| config_cdb_len(sdp); |
| return 0; |
| } |
| |
| static void scsi_debug_slave_destroy(struct scsi_device *sdp) |
| { |
| struct sdebug_dev_info *devip = |
| (struct sdebug_dev_info *)sdp->hostdata; |
| |
| if (sdebug_verbose) |
| pr_info("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 = false; |
| sdp->hostdata = NULL; |
| } |
| } |
| |
| static void stop_qc_helper(struct sdebug_defer *sd_dp, |
| enum sdeb_defer_type defer_t) |
| { |
| if (!sd_dp) |
| return; |
| if (defer_t == SDEB_DEFER_HRT) |
| hrtimer_cancel(&sd_dp->hrt); |
| else if (defer_t == SDEB_DEFER_WQ) |
| cancel_work_sync(&sd_dp->ew.work); |
| } |
| |
| /* If @cmnd found deletes its timer or work queue and returns true; else |
| returns false */ |
| static bool stop_queued_cmnd(struct scsi_cmnd *cmnd) |
| { |
| unsigned long iflags; |
| int j, k, qmax, r_qmax; |
| enum sdeb_defer_type l_defer_t; |
| struct sdebug_queue *sqp; |
| struct sdebug_queued_cmd *sqcp; |
| struct sdebug_dev_info *devip; |
| struct sdebug_defer *sd_dp; |
| |
| for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) { |
| spin_lock_irqsave(&sqp->qc_lock, iflags); |
| qmax = sdebug_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, sqp->in_use_bm)) { |
| sqcp = &sqp->qc_arr[k]; |
| if (cmnd != sqcp->a_cmnd) |
| continue; |
| /* found */ |
| devip = (struct sdebug_dev_info *) |
| cmnd->device->hostdata; |
| if (devip) |
| atomic_dec(&devip->num_in_q); |
| sqcp->a_cmnd = NULL; |
| sd_dp = sqcp->sd_dp; |
| if (sd_dp) { |
| l_defer_t = sd_dp->defer_t; |
| sd_dp->defer_t = SDEB_DEFER_NONE; |
| } else |
| l_defer_t = SDEB_DEFER_NONE; |
| spin_unlock_irqrestore(&sqp->qc_lock, iflags); |
| stop_qc_helper(sd_dp, l_defer_t); |
| clear_bit(k, sqp->in_use_bm); |
| return true; |
| } |
| } |
| spin_unlock_irqrestore(&sqp->qc_lock, iflags); |
| } |
| return false; |
| } |
| |
| /* Deletes (stops) timers or work queues of all queued commands */ |
| static void stop_all_queued(void) |
| { |
| unsigned long iflags; |
| int j, k; |
| enum sdeb_defer_type l_defer_t; |
| struct sdebug_queue *sqp; |
| struct sdebug_queued_cmd *sqcp; |
| struct sdebug_dev_info *devip; |
| struct sdebug_defer *sd_dp; |
| |
| for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) { |
| spin_lock_irqsave(&sqp->qc_lock, iflags); |
| for (k = 0; k < SDEBUG_CANQUEUE; ++k) { |
| if (test_bit(k, sqp->in_use_bm)) { |
| sqcp = &sqp->qc_arr[k]; |
| if (sqcp->a_cmnd == NULL) |
| continue; |
| devip = (struct sdebug_dev_info *) |
| sqcp->a_cmnd->device->hostdata; |
| if (devip) |
| atomic_dec(&devip->num_in_q); |
| sqcp->a_cmnd = NULL; |
| sd_dp = sqcp->sd_dp; |
| if (sd_dp) { |
| l_defer_t = sd_dp->defer_t; |
| sd_dp->defer_t = SDEB_DEFER_NONE; |
| } else |
| l_defer_t = SDEB_DEFER_NONE; |
| spin_unlock_irqrestore(&sqp->qc_lock, iflags); |
| stop_qc_helper(sd_dp, l_defer_t); |
| clear_bit(k, sqp->in_use_bm); |
| spin_lock_irqsave(&sqp->qc_lock, iflags); |
| } |
| } |
| spin_unlock_irqrestore(&sqp->qc_lock, iflags); |
| } |
| } |
| |
| /* Free queued command memory on heap */ |
| static void free_all_queued(void) |
| { |
| int j, k; |
| struct sdebug_queue *sqp; |
| struct sdebug_queued_cmd *sqcp; |
| |
| for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) { |
| for (k = 0; k < SDEBUG_CANQUEUE; ++k) { |
| sqcp = &sqp->qc_arr[k]; |
| kfree(sqcp->sd_dp); |
| sqcp->sd_dp = NULL; |
| } |
| } |
| } |
| |
| static int scsi_debug_abort(struct scsi_cmnd *SCpnt) |
| { |
| bool ok; |
| |
| ++num_aborts; |
| if (SCpnt) { |
| ok = stop_queued_cmnd(SCpnt); |
| if (SCpnt->device && (SDEBUG_OPT_ALL_NOISE & sdebug_opts)) |
| sdev_printk(KERN_INFO, SCpnt->device, |
| "%s: command%s found\n", __func__, |
| ok ? "" : " not"); |
| } |
| return SUCCESS; |
| } |
| |
| static int scsi_debug_device_reset(struct scsi_cmnd *SCpnt) |
| { |
| ++num_dev_resets; |
| if (SCpnt && SCpnt->device) { |
| struct scsi_device *sdp = SCpnt->device; |
| struct sdebug_dev_info *devip = |
| (struct sdebug_dev_info *)sdp->hostdata; |
| |
| if (SDEBUG_OPT_ALL_NOISE & sdebug_opts) |
| sdev_printk(KERN_INFO, sdp, "%s\n", __func__); |
| 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 (SDEBUG_OPT_ALL_NOISE & sdebug_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 (SDEBUG_OPT_RESET_NOISE & sdebug_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 (SDEBUG_OPT_ALL_NOISE & sdebug_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 (SDEBUG_OPT_RESET_NOISE & sdebug_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) && (SDEBUG_OPT_ALL_NOISE & sdebug_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 (SDEBUG_OPT_RESET_NOISE & sdebug_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 ((sdebug_num_parts < 1) || (store_size < 1048576)) |
| return; |
| if (sdebug_num_parts > SDEBUG_MAX_PARTS) { |
| sdebug_num_parts = SDEBUG_MAX_PARTS; |
| pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS); |
| } |
| num_sectors = (int)sdebug_store_sectors; |
| sectors_per_part = (num_sectors - sdebug_sectors_per) |
| / sdebug_num_parts; |
| heads_by_sects = sdebug_heads * sdebug_sectors_per; |
| starts[0] = sdebug_sectors_per; |
| for (k = 1; k < sdebug_num_parts; ++k) |
| starts[k] = ((k * sectors_per_part) / heads_by_sects) |
| * heads_by_sects; |
| starts[sdebug_num_parts] = num_sectors; |
| starts[sdebug_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 void block_unblock_all_queues(bool block) |
| { |
| int j; |
| struct sdebug_queue *sqp; |
| |
| for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) |
| atomic_set(&sqp->blocked, (int)block); |
| } |
| |
| /* Adjust (by rounding down) the sdebug_cmnd_count so abs(every_nth)-1 |
| * commands will be processed normally before triggers occur. |
| */ |
| static void tweak_cmnd_count(void) |
| { |
| int count, modulo; |
| |
| modulo = abs(sdebug_every_nth); |
| if (modulo < 2) |
| return; |
| block_unblock_all_queues(true); |
| count = atomic_read(&sdebug_cmnd_count); |
| atomic_set(&sdebug_cmnd_count, (count / modulo) * modulo); |
| block_unblock_all_queues(false); |
| } |
| |
| static void clear_queue_stats(void) |
| { |
| atomic_set(&sdebug_cmnd_count, 0); |
| atomic_set(&sdebug_completions, 0); |
| atomic_set(&sdebug_miss_cpus, 0); |
| atomic_set(&sdebug_a_tsf, 0); |
| } |
| |
| static void setup_inject(struct sdebug_queue *sqp, |
| struct sdebug_queued_cmd *sqcp) |
| { |
| if ((atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) > 0) { |
| if (sdebug_every_nth > 0) |
| sqcp->inj_recovered = sqcp->inj_transport |
| = sqcp->inj_dif |
| = sqcp->inj_dix = sqcp->inj_short = 0; |
| return; |
| } |
| sqcp->inj_recovered = !!(SDEBUG_OPT_RECOVERED_ERR & sdebug_opts); |
| sqcp->inj_transport = !!(SDEBUG_OPT_TRANSPORT_ERR & sdebug_opts); |
| sqcp->inj_dif = !!(SDEBUG_OPT_DIF_ERR & sdebug_opts); |
| sqcp->inj_dix = !!(SDEBUG_OPT_DIX_ERR & sdebug_opts); |
| sqcp->inj_short = !!(SDEBUG_OPT_SHORT_TRANSFER & sdebug_opts); |
| sqcp->inj_host_busy = !!(SDEBUG_OPT_HOST_BUSY & sdebug_opts); |
| } |
| |
| /* Complete the processing of the thread that queued a SCSI command to this |
| * driver. It either completes the command by calling cmnd_done() or |
| * schedules a hr timer or work queue then returns 0. Returns |
| * SCSI_MLQUEUE_HOST_BUSY if temporarily out of resources. |
| */ |
| static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip, |
| int scsi_result, |
| int (*pfp)(struct scsi_cmnd *, |
| struct sdebug_dev_info *), |
| int delta_jiff, int ndelay) |
| { |
| unsigned long iflags; |
| int k, num_in_q, qdepth, inject; |
| struct sdebug_queue *sqp; |
| struct sdebug_queued_cmd *sqcp; |
| struct scsi_device *sdp; |
| struct sdebug_defer *sd_dp; |
| |
| if (unlikely(devip == NULL)) { |
| if (scsi_result == 0) |
| scsi_result = DID_NO_CONNECT << 16; |
| goto respond_in_thread; |
| } |
| sdp = cmnd->device; |
| |
| if (delta_jiff == 0) |
| goto respond_in_thread; |
| |
| /* schedule the response at a later time if resources permit */ |
| sqp = get_queue(cmnd); |
| spin_lock_irqsave(&sqp->qc_lock, iflags); |
| if (unlikely(atomic_read(&sqp->blocked))) { |
| spin_unlock_irqrestore(&sqp->qc_lock, iflags); |
| return SCSI_MLQUEUE_HOST_BUSY; |
| } |
| num_in_q = atomic_read(&devip->num_in_q); |
| qdepth = cmnd->device->queue_depth; |
| inject = 0; |
| if (unlikely((qdepth > 0) && (num_in_q >= qdepth))) { |
| if (scsi_result) { |
| spin_unlock_irqrestore(&sqp->qc_lock, iflags); |
| goto respond_in_thread; |
| } else |
| scsi_result = device_qfull_result; |
| } else if (unlikely(sdebug_every_nth && |
| (SDEBUG_OPT_RARE_TSF & sdebug_opts) && |
| (scsi_result == 0))) { |
| if ((num_in_q == (qdepth - 1)) && |
| (atomic_inc_return(&sdebug_a_tsf) >= |
| abs(sdebug_every_nth))) { |
| atomic_set(&sdebug_a_tsf, 0); |
| inject = 1; |
| scsi_result = device_qfull_result; |
| } |
| } |
| |
| k = find_first_zero_bit(sqp->in_use_bm, sdebug_max_queue); |
| if (unlikely(k >= sdebug_max_queue)) { |
| spin_unlock_irqrestore(&sqp->qc_lock, iflags); |
| if (scsi_result) |
| goto respond_in_thread; |
| else if (SDEBUG_OPT_ALL_TSF & sdebug_opts) |
| scsi_result = device_qfull_result; |
| if (SDEBUG_OPT_Q_NOISE & sdebug_opts) |
| sdev_printk(KERN_INFO, sdp, |
| "%s: max_queue=%d exceeded, %s\n", |
| __func__, sdebug_max_queue, |
| (scsi_result ? "status: TASK SET FULL" : |
| "report: host busy")); |
| if (scsi_result) |
| goto respond_in_thread; |
| else |
| return SCSI_MLQUEUE_HOST_BUSY; |
| } |
| __set_bit(k, sqp->in_use_bm); |
| atomic_inc(&devip->num_in_q); |
| sqcp = &sqp->qc_arr[k]; |
| sqcp->a_cmnd = cmnd; |
| cmnd->host_scribble = (unsigned char *)sqcp; |
| sd_dp = sqcp->sd_dp; |
| spin_unlock_irqrestore(&sqp->qc_lock, iflags); |
| if (unlikely(sdebug_every_nth && sdebug_any_injecting_opt)) |
| setup_inject(sqp, sqcp); |
| if (sd_dp == NULL) { |
| sd_dp = kzalloc(sizeof(*sd_dp), GFP_ATOMIC); |
| if (sd_dp == NULL) |
| return SCSI_MLQUEUE_HOST_BUSY; |
| } |
| |
| cmnd->result = pfp != NULL ? pfp(cmnd, devip) : 0; |
| if (cmnd->result & SDEG_RES_IMMED_MASK) { |
| /* |
| * This is the F_DELAY_OVERR case. No delay. |
| */ |
| cmnd->result &= ~SDEG_RES_IMMED_MASK; |
| delta_jiff = ndelay = 0; |
| } |
| if (cmnd->result == 0 && scsi_result != 0) |
| cmnd->result = scsi_result; |
| |
| if (unlikely(sdebug_verbose && cmnd->result)) |
| sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n", |
| __func__, cmnd->result); |
| |
| if (delta_jiff > 0 || ndelay > 0) { |
| ktime_t kt; |
| |
| if (delta_jiff > 0) { |
| kt = ns_to_ktime((u64)delta_jiff * (NSEC_PER_SEC / HZ)); |
| } else |
| kt = ndelay; |
| if (!sd_dp->init_hrt) { |
| sd_dp->init_hrt = true; |
| sqcp->sd_dp = sd_dp; |
| hrtimer_init(&sd_dp->hrt, CLOCK_MONOTONIC, |
| HRTIMER_MODE_REL_PINNED); |
| sd_dp->hrt.function = sdebug_q_cmd_hrt_complete; |
| sd_dp->sqa_idx = sqp - sdebug_q_arr; |
| sd_dp->qc_idx = k; |
| } |
| if (sdebug_statistics) |
| sd_dp->issuing_cpu = raw_smp_processor_id(); |
| sd_dp->defer_t = SDEB_DEFER_HRT; |
| hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED); |
| } else { /* jdelay < 0, use work queue */ |
| if (!sd_dp->init_wq) { |
| sd_dp->init_wq = true; |
| sqcp->sd_dp = sd_dp; |
| sd_dp->sqa_idx = sqp - sdebug_q_arr; |
| sd_dp->qc_idx = k; |
| INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete); |
| } |
| if (sdebug_statistics) |
| sd_dp->issuing_cpu = raw_smp_processor_id(); |
| sd_dp->defer_t = SDEB_DEFER_WQ; |
| schedule_work(&sd_dp->ew.work); |
| } |
| if (unlikely((SDEBUG_OPT_Q_NOISE & sdebug_opts) && |
| (scsi_result == device_qfull_result))) |
| sdev_printk(KERN_INFO, sdp, |
| "%s: num_in_q=%d +1, %s%s\n", __func__, |
| num_in_q, (inject ? "<inject> " : ""), |
| "status: TASK SET FULL"); |
| return 0; |
| |
| respond_in_thread: /* call back to mid-layer using invocation thread */ |
| cmnd->result = pfp != NULL ? pfp(cmnd, devip) : 0; |
| cmnd->result &= ~SDEG_RES_IMMED_MASK; |
| if (cmnd->result == 0 && scsi_result != 0) |
| cmnd->result = scsi_result; |
| cmnd->scsi_done(cmnd); |
| 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, sdebug_add_host, int, S_IRUGO | S_IWUSR); |
| module_param_named(ato, sdebug_ato, int, S_IRUGO); |
| module_param_named(cdb_len, sdebug_cdb_len, int, 0644); |
| module_param_named(clustering, sdebug_clustering, bool, S_IRUGO | S_IWUSR); |
| module_param_named(delay, sdebug_jdelay, int, S_IRUGO | S_IWUSR); |
| module_param_named(dev_size_mb, sdebug_dev_size_mb, int, S_IRUGO); |
| module_param_named(dif, sdebug_dif, int, S_IRUGO); |
| module_param_named(dix, sdebug_dix, int, S_IRUGO); |
| module_param_named(dsense, sdebug_dsense, int, S_IRUGO | S_IWUSR); |
| module_param_named(every_nth, sdebug_every_nth, int, S_IRUGO | S_IWUSR); |
| module_param_named(fake_rw, sdebug_fake_rw, int, S_IRUGO | S_IWUSR); |
| module_param_named(guard, sdebug_guard, uint, S_IRUGO); |
| module_param_named(host_lock, sdebug_host_lock, bool, S_IRUGO | S_IWUSR); |
| module_param_string(inq_vendor, sdebug_inq_vendor_id, |
| sizeof(sdebug_inq_vendor_id), S_IRUGO|S_IWUSR); |
| module_param_string(inq_product, sdebug_inq_product_id, |
| sizeof(sdebug_inq_product_id), S_IRUGO|S_IWUSR); |
| module_param_string(inq_rev, sdebug_inq_product_rev, |
| sizeof(sdebug_inq_product_rev), S_IRUGO|S_IWUSR); |
| module_param_named(lbpu, sdebug_lbpu, int, S_IRUGO); |
| module_param_named(lbpws, sdebug_lbpws, int, S_IRUGO); |
| module_param_named(lbpws10, sdebug_lbpws10, int, S_IRUGO); |
| module_param_named(lbprz, sdebug_lbprz, int, S_IRUGO); |
| module_param_named(lowest_aligned, sdebug_lowest_aligned, int, S_IRUGO); |
| module_param_named(max_luns, sdebug_max_luns, int, S_IRUGO | S_IWUSR); |
| module_param_named(max_queue, sdebug_max_queue, int, S_IRUGO | S_IWUSR); |
| module_param_named(medium_error_start, sdebug_medium_error_start, int, S_IRUGO | S_IWUSR); |
| module_param_named(medium_error_count, sdebug_medium_error_count, int, S_IRUGO | S_IWUSR); |
| module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR); |
| module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR); |
| module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO); |
| module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO); |
| module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR); |
| module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO); |
| module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR); |
| module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO); |
| module_param_named(opt_xferlen_exp, sdebug_opt_xferlen_exp, int, S_IRUGO); |
| module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR); |
| module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR); |
| module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO); |
| module_param_named(sector_size, sdebug_sector_size, int, S_IRUGO); |
| module_param_named(statistics, sdebug_statistics, bool, S_IRUGO | S_IWUSR); |
| module_param_named(strict, sdebug_strict, bool, S_IRUGO | S_IWUSR); |
| module_param_named(submit_queues, submit_queues, int, S_IRUGO); |
| module_param_named(unmap_alignment, sdebug_unmap_alignment, int, S_IRUGO); |
| module_param_named(unmap_granularity, sdebug_unmap_granularity, int, S_IRUGO); |
| module_param_named(unmap_max_blocks, sdebug_unmap_max_blocks, int, S_IRUGO); |
| module_param_named(unmap_max_desc, sdebug_unmap_max_desc, int, S_IRUGO); |
| module_param_named(virtual_gb, sdebug_virtual_gb, int, S_IRUGO | S_IWUSR); |
| module_param_named(uuid_ctl, sdebug_uuid_ctl, int, S_IRUGO); |
| module_param_named(vpd_use_hostno, sdebug_vpd_use_hostno, int, |
| S_IRUGO | S_IWUSR); |
| module_param_named(write_same_length, sdebug_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(SDEBUG_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(cdb_len, "suggest CDB lengths to drivers (def=10)"); |
| 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 MiB 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, "host_lock is ignored (def=0)"); |
| MODULE_PARM_DESC(inq_vendor, "SCSI INQUIRY vendor string (def=\"Linux\")"); |
| MODULE_PARM_DESC(inq_product, "SCSI INQUIRY product string (def=\"scsi_debug\")"); |
| MODULE_PARM_DESC(inq_rev, "SCSI INQUIRY revision string (def=\"" |
| SDEBUG_VERSION "\")"); |
| 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, |
| "on read unmapped LBs return 0 when 1 (def), return 0xff when 2"); |
| 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(medium_error_start, "starting sector number to return MEDIUM error"); |
| MODULE_PARM_DESC(medium_error_count, "count of sectors to return follow on MEDIUM error"); |
| 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 blocks (def=1024)"); |
| 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(opt_xferlen_exp, "optimal transfer length granularity exponent (def=physblk_exp)"); |
| 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=7[SPC-5])"); |
| MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)"); |
| MODULE_PARM_DESC(statistics, "collect statistics on commands, queues (def=0)"); |
| MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)"); |
| MODULE_PARM_DESC(submit_queues, "support for block multi-queue (def=1)"); |
| 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(uuid_ctl, |
| "1->use uuid for lu name, 0->don't, 2->all use same (def=0)"); |
| MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) 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)"); |
| |
| #define SDEBUG_INFO_LEN 256 |
| static char sdebug_info[SDEBUG_INFO_LEN]; |
| |
| static const char *scsi_debug_info(struct Scsi_Host *shp) |
| { |
| int k; |
| |
| k = scnprintf(sdebug_info, SDEBUG_INFO_LEN, "%s: version %s [%s]\n", |
| my_name, SDEBUG_VERSION, sdebug_version_date); |
| if (k >= (SDEBUG_INFO_LEN - 1)) |
| return sdebug_info; |
| scnprintf(sdebug_info + k, SDEBUG_INFO_LEN - k, |
| " dev_size_mb=%d, opts=0x%x, submit_queues=%d, %s=%d", |
| sdebug_dev_size_mb, sdebug_opts, submit_queues, |
| "statistics", (int)sdebug_statistics); |
| return sdebug_info; |
| } |
| |
| /* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' 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; |
| sdebug_opts = opts; |
| sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts); |
| sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts); |
| if (sdebug_every_nth != 0) |
| tweak_cmnd_count(); |
| return length; |
| } |
| |
| /* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. 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, j, l; |
| struct sdebug_queue *sqp; |
| |
| seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n", |
| SDEBUG_VERSION, sdebug_version_date); |
| seq_printf(m, "num_tgts=%d, %ssize=%d MB, opts=0x%x, every_nth=%d\n", |
| sdebug_num_tgts, "shared (ram) ", sdebug_dev_size_mb, |
| sdebug_opts, sdebug_every_nth); |
| seq_printf(m, "delay=%d, ndelay=%d, max_luns=%d, sector_size=%d %s\n", |
| sdebug_jdelay, sdebug_ndelay, sdebug_max_luns, |
| sdebug_sector_size, "bytes"); |
| seq_printf(m, "cylinders=%d, heads=%d, sectors=%d, command aborts=%d\n", |
| sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per, |
| num_aborts); |
| seq_printf(m, "RESETs: device=%d, target=%d, bus=%d, host=%d\n", |
| num_dev_resets, num_target_resets, num_bus_resets, |
| num_host_resets); |
| seq_printf(m, "dix_reads=%d, dix_writes=%d, dif_errors=%d\n", |
| dix_reads, dix_writes, dif_errors); |
| seq_printf(m, "usec_in_jiffy=%lu, statistics=%d\n", TICK_NSEC / 1000, |
| sdebug_statistics); |
| seq_printf(m, "cmnd_count=%d, completions=%d, %s=%d, a_tsf=%d\n", |
| atomic_read(&sdebug_cmnd_count), |
| atomic_read(&sdebug_completions), |
| "miss_cpus", atomic_read(&sdebug_miss_cpus), |
| atomic_read(&sdebug_a_tsf)); |
| |
| seq_printf(m, "submit_queues=%d\n", submit_queues); |
| for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) { |
| seq_printf(m, " queue %d:\n", j); |
| f = find_first_bit(sqp->in_use_bm, sdebug_max_queue); |
| if (f != sdebug_max_queue) { |
| l = find_last_bit(sqp->in_use_bm, sdebug_max_queue); |
| seq_printf(m, " in_use_bm BUSY: %s: %d,%d\n", |
| "first,last bits", f, l); |
| } |
| } |
| return 0; |
| } |
| |
| static ssize_t delay_show(struct device_driver *ddp, char *buf) |
| { |
| return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_jdelay); |
| } |
| /* Returns -EBUSY if jdelay is being changed and commands are queued. The unit |
| * of delay is jiffies. |
| */ |
| static ssize_t delay_store(struct device_driver *ddp, const char *buf, |
| size_t count) |
| { |
| int jdelay, res; |
| |
| if (count > 0 && sscanf(buf, "%d", &jdelay) == 1) { |
| res = count; |
| if (sdebug_jdelay != jdelay) { |
| int j, k; |
| struct sdebug_queue *sqp; |
| |
| block_unblock_all_queues(true); |
| for (j = 0, sqp = sdebug_q_arr; j < submit_queues; |
| ++j, ++sqp) { |
| k = find_first_bit(sqp->in_use_bm, |
| sdebug_max_queue); |
| if (k != sdebug_max_queue) { |
| res = -EBUSY; /* queued commands */ |
| break; |
| } |
| } |
| if (res > 0) { |
| sdebug_jdelay = jdelay; |
| sdebug_ndelay = 0; |
| } |
| block_unblock_all_queues(false); |
| } |
| 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", sdebug_ndelay); |
| } |
| /* Returns -EBUSY if ndelay is being changed and commands are queued */ |
| /* If > 0 and accepted then sdebug_jdelay is set to JDELAY_OVERRIDDEN */ |
| static ssize_t ndelay_store(struct device_driver *ddp, const char *buf, |
| size_t count) |
| { |
| int ndelay, res; |
| |
| if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) && |
| (ndelay >= 0) && (ndelay < (1000 * 1000 * 1000))) { |
| res = count; |
| if (sdebug_ndelay != ndelay) { |
| int j, k; |
| struct sdebug_queue *sqp; |
| |
| block_unblock_all_queues(true); |
| for (j = 0, sqp = sdebug_q_arr; j < submit_queues; |
| ++j, ++sqp) { |
| k = find_first_bit(sqp->in_use_bm, |
| sdebug_max_queue); |
| if (k != sdebug_max_queue) { |
| res = -EBUSY; /* queued commands */ |
| break; |
| } |
| } |
| if (res > 0) { |
| sdebug_ndelay = ndelay; |
| sdebug_jdelay = ndelay ? JDELAY_OVERRIDDEN |
| : DEF_JDELAY; |
| } |
| block_unblock_all_queues(false); |
| } |
| 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", sdebug_opts); |
| } |
| |
| static ssize_t opts_store(struct device_driver *ddp, const char *buf, |
| size_t count) |
| { |
| int opts; |
| char work[20]; |
| |
| if (sscanf(buf, "%10s", work) == 1) { |
| if (strncasecmp(work, "0x", 2) == 0) { |
| if (kstrtoint(work + 2, 16, &opts) == 0) |
| goto opts_done; |
| } else { |
| if (kstrtoint(work, 10, &opts) == 0) |
| goto opts_done; |
| } |
| } |
| return -EINVAL; |
| opts_done: |
| sdebug_opts = opts; |
| sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts); |
| sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts); |
| tweak_cmnd_count(); |
| 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", sdebug_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)) { |
| sdebug_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", sdebug_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)) { |
| sdebug_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", sdebug_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); |
| sdebug_fake_rw = (sdebug_fake_rw > 0); |
| if (sdebug_fake_rw != n) { |
| if ((0 == n) && (NULL == fake_storep)) { |
| unsigned long sz = |
| (unsigned long)sdebug_dev_size_mb * |
| 1048576; |
| |
| fake_storep = vmalloc(sz); |
| if (NULL == fake_storep) { |
| pr_err("out of memory, 9\n"); |
| return -ENOMEM; |
| } |
| memset(fake_storep, 0, sz); |
| } |
| sdebug_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", sdebug_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)) { |
| sdebug_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", sdebug_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)) { |
| sdebug_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", sdebug_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", sdebug_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", sdebug_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))) { |
| sdebug_every_nth = nth; |
| if (nth && !sdebug_statistics) { |
| pr_info("every_nth needs statistics=1, set it\n"); |
| sdebug_statistics = true; |
| } |
| tweak_cmnd_count(); |
| 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", sdebug_max_luns); |
| } |
| static ssize_t max_luns_store(struct device_driver *ddp, const char *buf, |
| size_t count) |
| { |
| int n; |
| bool changed; |
| |
| if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { |
| if (n > 256) { |
| pr_warn("max_luns can be no more than 256\n"); |
| return -EINVAL; |
| } |
| changed = (sdebug_max_luns != n); |
| sdebug_max_luns = n; |
| sdebug_max_tgts_luns(); |
| if (changed && (sdebug_scsi_level >= 5)) { /* >= SPC-3 */ |
| struct sdebug_host_info *sdhp; |
| struct sdebug_dev_info *dp; |
| |
| spin_lock(&sdebug_host_list_lock); |
| list_for_each_entry(sdhp, &sdebug_host_list, |
| host_list) { |
| list_for_each_entry(dp, &sdhp->dev_info_list, |
| dev_list) { |
| set_bit(SDEBUG_UA_LUNS_CHANGED, |
| dp->uas_bm); |
| } |
| } |
| spin_unlock(&sdebug_host_list_lock); |
| } |
| 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", sdebug_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) |
| { |
| int j, n, k, a; |
| struct sdebug_queue *sqp; |
| |
| if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) && |
| (n <= SDEBUG_CANQUEUE)) { |
| block_unblock_all_queues(true); |
| k = 0; |
| for (j = 0, sqp = sdebug_q_arr; j < submit_queues; |
| ++j, ++sqp) { |
| a = find_last_bit(sqp->in_use_bm, SDEBUG_CANQUEUE); |
| if (a > k) |
| k = a; |
| } |
| sdebug_max_queue = n; |
| if (k == SDEBUG_CANQUEUE) |
| atomic_set(&retired_max_queue, 0); |
| else if (k >= n) |
| atomic_set(&retired_max_queue, k + 1); |
| else |
| atomic_set(&retired_max_queue, 0); |
| block_unblock_all_queues(false); |
| 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", sdebug_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", sdebug_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", sdebug_virtual_gb); |
| } |
| static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf, |
| size_t count) |
| { |
| int n; |
| bool changed; |
| |
| if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { |
| changed = (sdebug_virtual_gb != n); |
| sdebug_virtual_gb = n; |
| sdebug_capacity = get_sdebug_capacity(); |
| if (changed) { |
| struct sdebug_host_info *sdhp; |
| struct sdebug_dev_info *dp; |
| |
| spin_lock(&sdebug_host_list_lock); |
| list_for_each_entry(sdhp, &sdebug_host_list, |
| host_list) { |
| list_for_each_entry(dp, &sdhp->dev_info_list, |
| dev_list) { |
| set_bit(SDEBUG_UA_CAPACITY_CHANGED, |
| dp->uas_bm); |
| } |
| } |
| spin_unlock(&sdebug_host_list_lock); |
| } |
| 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", sdebug_add_host); |
| } |
| |
| static int sdebug_add_adapter(void); |
| static void sdebug_remove_adapter(void); |
| |
| 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", sdebug_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)) { |
| sdebug_vpd_use_hostno = n; |
| return count; |
| } |
| return -EINVAL; |
| } |
| static DRIVER_ATTR_RW(vpd_use_hostno); |
| |
| static ssize_t statistics_show(struct device_driver *ddp, char *buf) |
| { |
| return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_statistics); |
| } |
| static ssize_t statistics_store(struct device_driver *ddp, const char *buf, |
| size_t count) |
| { |
| int n; |
| |
| if ((count > 0) && (sscanf(buf, "%d", &n) == 1) && (n >= 0)) { |
| if (n > 0) |
| sdebug_statistics = true; |
| else { |
| clear_queue_stats(); |
| sdebug_statistics = false; |
| } |
| return count; |
| } |
| return -EINVAL; |
| } |
| static DRIVER_ATTR_RW(statistics); |
| |
| static ssize_t sector_size_show(struct device_driver *ddp, char *buf) |
| { |
| return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_sector_size); |
| } |
| static DRIVER_ATTR_RO(sector_size); |
| |
| static ssize_t submit_queues_show(struct device_driver *ddp, char *buf) |
| { |
| return scnprintf(buf, PAGE_SIZE, "%d\n", submit_queues); |
| } |
| static DRIVER_ATTR_RO(submit_queues); |
| |
| static ssize_t dix_show(struct device_driver *ddp, char *buf) |
| { |
| return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dix); |
| } |
| static DRIVER_ATTR_RO(dix); |
| |
| static ssize_t dif_show(struct device_driver *ddp, char *buf) |
| { |
| return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dif); |
| } |
| static DRIVER_ATTR_RO(dif); |
| |
| static ssize_t guard_show(struct device_driver *ddp, char *buf) |
| { |
| return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_guard); |
| } |
| static DRIVER_ATTR_RO(guard); |
| |
| static ssize_t ato_show(struct device_driver *ddp, char *buf) |
| { |
| return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_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 = scnprintf(buf, PAGE_SIZE - 1, "%*pbl", |
| (int)map_size, map_storep); |
| 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", sdebug_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)) { |
| sdebug_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", !!sdebug_host_lock); |
| } |
| /* N.B. sdebug_host_lock does nothing, kept for backward compatibility */ |
| static ssize_t host_lock_store(struct device_driver *ddp, const char *buf, |
| size_t count) |
| { |
| int n; |
| |
| if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { |
| sdebug_host_lock = (n > 0); |
| return count; |
| } |
| return -EINVAL; |
| } |
| static DRIVER_ATTR_RW(host_lock); |
| |
| static ssize_t strict_show(struct device_driver *ddp, char *buf) |
| { |
| return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_strict); |
| } |
| static ssize_t strict_store(struct device_driver *ddp, const char *buf, |
| size_t count) |
| { |
| int n; |
| |
| if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { |
| sdebug_strict = (n > 0); |
| return count; |
| } |
| return -EINVAL; |
| } |
| static DRIVER_ATTR_RW(strict); |
| |
| static ssize_t uuid_ctl_show(struct device_driver *ddp, char *buf) |
| { |
| return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_uuid_ctl); |
| } |
| static DRIVER_ATTR_RO(uuid_ctl); |
| |
| static ssize_t cdb_len_show(struct device_driver *ddp, char *buf) |
| { |
| return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_cdb_len); |
| } |
| static ssize_t cdb_len_store(struct device_driver *ddp, const char *buf, |
| size_t count) |
| { |
| int ret, n; |
| |
| ret = kstrtoint(buf, 0, &n); |
| if (ret) |
| return ret; |
| sdebug_cdb_len = n; |
| all_config_cdb_len(); |
| return count; |
| } |
| static DRIVER_ATTR_RW(cdb_len); |
| |
| |
| /* 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_statistics.attr, |
| &driver_attr_submit_queues.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, |
| &driver_attr_strict.attr, |
| &driver_attr_uuid_ctl.attr, |
| &driver_attr_cdb_len.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(&retired_max_queue, 0); |
| |
| if (sdebug_ndelay >= 1000 * 1000 * 1000) { |
| pr_warn("ndelay must be less than 1 second, ignored\n"); |
| sdebug_ndelay = 0; |
| } else if (sdebug_ndelay > 0) |
| sdebug_jdelay = JDELAY_OVERRIDDEN; |
| |
| switch (sdebug_sector_size) { |
| case 512: |
| case 1024: |
| case 2048: |
| case 4096: |
| break; |
| default: |
| pr_err("invalid sector_size %d\n", sdebug_sector_size); |
| return -EINVAL; |
| } |
| |
| switch (sdebug_dif) { |
| case T10_PI_TYPE0_PROTECTION: |
| break; |
| case T10_PI_TYPE1_PROTECTION: |
| case T10_PI_TYPE2_PROTECTION: |
| case T10_PI_TYPE3_PROTECTION: |
| have_dif_prot = true; |
| break; |
| |
| default: |
| pr_err("dif must be 0, 1, 2 or 3\n"); |
| return -EINVAL; |
| } |
| |
| if (sdebug_guard > 1) { |
| pr_err("guard must be 0 or 1\n"); |
| return -EINVAL; |
| } |
| |
| if (sdebug_ato > 1) { |
| pr_err("ato must be 0 or 1\n"); |
| return -EINVAL; |
| } |
| |
| if (sdebug_physblk_exp > 15) { |
| pr_err("invalid physblk_exp %u\n", sdebug_physblk_exp); |
| return -EINVAL; |
| } |
| if (sdebug_max_luns > 256) { |
| pr_warn("max_luns can be no more than 256, use default\n"); |
| sdebug_max_luns = DEF_MAX_LUNS; |
| } |
| |
| if (sdebug_lowest_aligned > 0x3fff) { |
| pr_err("lowest_aligned too big: %u\n", sdebug_lowest_aligned); |
| return -EINVAL; |
| } |
| |
| if (submit_queues < 1) { |
| pr_err("submit_queues must be 1 or more\n"); |
| return -EINVAL; |
| } |
| sdebug_q_arr = kcalloc(submit_queues, sizeof(struct sdebug_queue), |
| GFP_KERNEL); |
| if (sdebug_q_arr == NULL) |
| return -ENOMEM; |
| for (k = 0; k < submit_queues; ++k) |
| spin_lock_init(&sdebug_q_arr[k].qc_lock); |
| |
| if (sdebug_dev_size_mb < 1) |
| sdebug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */ |
| sz = (unsigned long)sdebug_dev_size_mb * 1048576; |
| sdebug_store_sectors = sz / sdebug_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 (sdebug_dev_size_mb >= 256) |
| sdebug_heads = 64; |
| else if (sdebug_dev_size_mb >= 16) |
| sdebug_heads = 32; |
| 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 (sdebug_fake_rw == 0) { |
| fake_storep = vmalloc(sz); |
| if (NULL == fake_storep) { |
| pr_err("out of memory, 1\n"); |
| ret = -ENOMEM; |
| goto free_q_arr; |
| } |
| memset(fake_storep, 0, sz); |
| if (sdebug_num_parts > 0) |
| sdebug_build_parts(fake_storep, sz); |
| } |
| |
| if (sdebug_dix) { |
| int dif_size; |
| |
| dif_size = sdebug_store_sectors * sizeof(struct t10_pi_tuple); |
| dif_storep = vmalloc(dif_size); |
| |
| pr_err("dif_storep %u bytes @ %p\n", dif_size, dif_storep); |
| |
| if (dif_storep == NULL) { |
| pr_err("out of mem. (DIX)\n"); |
| ret = -ENOMEM; |
| goto free_vm; |
| } |
| |
| memset(dif_storep, 0xff, dif_size); |
| } |
| |
| /* Logical Block Provisioning */ |
| if (scsi_debug_lbp()) { |
| sdebug_unmap_max_blocks = |
| clamp(sdebug_unmap_max_blocks, 0U, 0xffffffffU); |
| |
| sdebug_unmap_max_desc = |
| clamp(sdebug_unmap_max_desc, 0U, 256U); |
| |
| sdebug_unmap_granularity = |
| clamp(sdebug_unmap_granularity, 1U, 0xffffffffU); |
| |
| if (sdebug_unmap_alignment && |
| sdebug_unmap_granularity <= |
| sdebug_unmap_alignment) { |
| pr_err("ERR: unmap_granularity <= unmap_alignment\n"); |
| ret = -EINVAL; |
| goto free_vm; |
| } |
| |
| map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1; |
| map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long)); |
| |
| pr_info("%lu provisioning blocks\n", map_size); |
| |
| if (map_storep == NULL) { |
| pr_err("out of mem. (MAP)\n"); |
| ret = -ENOMEM; |
| goto free_vm; |
| } |
| |
| bitmap_zero(map_storep, map_size); |
| |
| /* Map first 1KB for partition table */ |
| if (sdebug_num_parts) |
| map_region(0, 2); |
| } |
| |
| pseudo_primary = root_device_register("pseudo_0"); |
| if (IS_ERR(pseudo_primary)) { |
| pr_warn("root_device_register() error\n"); |
| ret = PTR_ERR(pseudo_primary); |
| goto free_vm; |
| } |
| ret = bus_register(&pseudo_lld_bus); |
| if (ret < 0) { |
| pr_warn("bus_register error: %d\n", ret); |
| goto dev_unreg; |
| } |
| ret = driver_register(&sdebug_driverfs_driver); |
| if (ret < 0) { |
| pr_warn("driver_register error: %d\n", ret); |
| goto bus_unreg; |
| } |
| |
| host_to_add = sdebug_add_host; |
| sdebug_add_host = 0; |
| |
| for (k = 0; k < host_to_add; k++) { |
| if (sdebug_add_adapter()) { |
| pr_err("sdebug_add_adapter failed k=%d\n", k); |
| break; |
| } |
| } |
| |
| if (sdebug_verbose) |
| pr_info("built %d host(s)\n", sdebug_add_host); |
| |
| return 0; |
| |
| bus_unreg: |
| bus_unregister(&pseudo_lld_bus); |
| dev_unreg: |
| root_device_unregister(pseudo_primary); |
| free_vm: |
| vfree(map_storep); |
| vfree(dif_storep); |
| vfree(fake_storep); |
| free_q_arr: |
| kfree(sdebug_q_arr); |
| return ret; |
| } |
| |
| static void __exit scsi_debug_exit(void) |
| { |
| int k = sdebug_add_host; |
| |
| stop_all_queued(); |
| for (; k; k--) |
| sdebug_remove_adapter(); |
| free_all_queued(); |
| driver_unregister(&sdebug_driverfs_driver); |
| bus_unregister(&pseudo_lld_bus); |
| root_device_unregister(pseudo_primary); |
| |
| vfree(map_storep); |
| vfree(dif_storep); |
| vfree(fake_storep); |
| kfree(sdebug_q_arr); |
| } |
| |
| 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 (sdbg_host == NULL) { |
| pr_err("out of memory at line %d\n", __LINE__); |
| return -ENOMEM; |
| } |
| |
| INIT_LIST_HEAD(&sdbg_host->dev_info_list); |
| |
| devs_per_host = sdebug_num_tgts * sdebug_max_luns; |
| for (k = 0; k < devs_per_host; k++) { |
| sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL); |
| if (!sdbg_devinfo) { |
| pr_err("out of memory at line %d\n", __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", sdebug_add_host); |
| |
| error = device_register(&sdbg_host->dev); |
| |
| if (error) |
| goto clean; |
| |
| ++sdebug_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); |
| --sdebug_add_host; |
| } |
| |
| static int sdebug_change_qdepth(struct scsi_device *sdev, int qdepth) |
| { |
| int num_in_q = 0; |
| struct sdebug_dev_info *devip; |
| |
| block_unblock_all_queues(true); |
| devip = (struct sdebug_dev_info *)sdev->hostdata; |
| if (NULL == devip) { |
| block_unblock_all_queues(false); |
| return -ENODEV; |
| } |
| num_in_q = atomic_read(&devip->num_in_q); |
| |
| if (qdepth < 1) |
| qdepth = 1; |
| /* allow to exceed max host qc_arr elements for testing */ |
| if (qdepth > SDEBUG_CANQUEUE + 10) |
| qdepth = SDEBUG_CANQUEUE + 10; |
| scsi_change_queue_depth(sdev, qdepth); |
| |
| if (SDEBUG_OPT_Q_NOISE & sdebug_opts) { |
| sdev_printk(KERN_INFO, sdev, "%s: qdepth=%d, num_in_q=%d\n", |
| __func__, qdepth, num_in_q); |
| } |
| block_unblock_all_queues(false); |
| return sdev->queue_depth; |
| } |
| |
| static bool fake_timeout(struct scsi_cmnd *scp) |
| { |
| if (0 == (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth))) { |
| if (sdebug_every_nth < -1) |
| sdebug_every_nth = -1; |
| if (SDEBUG_OPT_TIMEOUT & sdebug_opts) |
| return true; /* ignore command causing timeout */ |
| else if (SDEBUG_OPT_MAC_TIMEOUT & sdebug_opts && |
| scsi_medium_access_command(scp)) |
| return true; /* time out reads and writes */ |
| } |
| return false; |
| } |
| |
| static bool fake_host_busy(struct scsi_cmnd *scp) |
| { |
| return (sdebug_opts & SDEBUG_OPT_HOST_BUSY) && |
| (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) == 0; |
| } |
| |
| static int scsi_debug_queuecommand(struct Scsi_Host *shost, |
| struct scsi_cmnd *scp) |
| { |
| u8 sdeb_i; |
| struct scsi_device *sdp = scp->device; |
| const struct opcode_info_t *oip; |
| const struct opcode_info_t *r_oip; |
| struct sdebug_dev_info *devip; |
| u8 *cmd = scp->cmnd; |
| int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *); |
| int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *) = NULL; |
| int k, na; |
| int errsts = 0; |
| u32 flags; |
| u16 sa; |
| u8 opcode = cmd[0]; |
| bool has_wlun_rl; |
| |
| scsi_set_resid(scp, 0); |
| if (sdebug_statistics) |
| atomic_inc(&sdebug_cmnd_count); |
| if (unlikely(sdebug_verbose && |
| !(SDEBUG_OPT_NO_CDB_NOISE & sdebug_opts))) { |
| char b[120]; |
| int n, len, sb; |
| |
| len = scp->cmd_len; |
| sb = (int)sizeof(b); |
| if (len > 32) |
| strcpy(b, "too long, over 32 bytes"); |
| else { |
| for (k = 0, n = 0; k < len && n < sb; ++k) |
| n += scnprintf(b + n, sb - n, "%02x ", |
| (u32)cmd[k]); |
| } |
| sdev_printk(KERN_INFO, sdp, "%s: tag=%#x, cmd %s\n", my_name, |
| blk_mq_unique_tag(scp->request), b); |
| } |
| if (fake_host_busy(scp)) |
| return SCSI_MLQUEUE_HOST_BUSY; |
| has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS); |
| if (unlikely((sdp->lun >= sdebug_max_luns) && !has_wlun_rl)) |
| goto err_out; |
| |
| sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */ |
| oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */ |
| devip = (struct sdebug_dev_info *)sdp->hostdata; |
| if (unlikely(!devip)) { |
| devip = find_build_dev_info(sdp); |
| if (NULL == devip) |
| goto err_out; |
| } |
| na = oip->num_attached; |
| r_pfp = oip->pfp; |
| if (na) { /* multiple commands with this opcode */ |
| r_oip = oip; |
| if (FF_SA & r_oip->flags) { |
| if (F_SA_LOW & oip->flags) |
| sa = 0x1f & cmd[1]; |
| else |
| sa = get_unaligned_be16(cmd + 8); |
| for (k = 0; k <= na; oip = r_oip->arrp + k++) { |
| if (opcode == oip->opcode && sa == oip->sa) |
| break; |
| } |
| } else { /* since no service action only check opcode */ |
| for (k = 0; k <= na; oip = r_oip->arrp + k++) { |
| if (opcode == oip->opcode) |
| break; |
| } |
| } |
| if (k > na) { |
| if (F_SA_LOW & r_oip->flags) |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4); |
| else if (F_SA_HIGH & r_oip->flags) |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7); |
| else |
| mk_sense_invalid_opcode(scp); |
| goto check_cond; |
| } |
| } /* else (when na==0) we assume the oip is a match */ |
| flags = oip->flags; |
| if (unlikely(F_INV_OP & flags)) { |
| mk_sense_invalid_opcode(scp); |
| goto check_cond; |
| } |
| if (unlikely(has_wlun_rl && !(F_RL_WLUN_OK & flags))) { |
| if (sdebug_verbose) |
| sdev_printk(KERN_INFO, sdp, "%s: Opcode 0x%x not%s\n", |
| my_name, opcode, " supported for wlun"); |
| mk_sense_invalid_opcode(scp); |
| goto check_cond; |
| } |
| if (unlikely(sdebug_strict)) { /* check cdb against mask */ |
| u8 rem; |
| int j; |
| |
| for (k = 1; k < oip->len_mask[0] && k < 16; ++k) { |
| rem = ~oip->len_mask[k] & cmd[k]; |
| if (rem) { |
| for (j = 7; j >= 0; --j, rem <<= 1) { |
| if (0x80 & rem) |
| break; |
| } |
| mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j); |
| goto check_cond; |
| } |
| } |
| } |
| if (unlikely(!(F_SKIP_UA & flags) && |
| find_first_bit(devip->uas_bm, |
| SDEBUG_NUM_UAS) != SDEBUG_NUM_UAS)) { |
| errsts = make_ua(scp, devip); |
| if (errsts) |
| goto check_cond; |
| } |
| if (unlikely((F_M_ACCESS & flags) && atomic_read(&devip->stopped))) { |
| mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2); |
| if (sdebug_verbose) |
| sdev_printk(KERN_INFO, sdp, "%s reports: Not ready: " |
| "%s\n", my_name, "initializing command " |
| "required"); |
| errsts = check_condition_result; |
| goto fini; |
| } |
| if (sdebug_fake_rw && (F_FAKE_RW & flags)) |
| goto fini; |
| if (unlikely(sdebug_every_nth)) { |
| if (fake_timeout(scp)) |
| return 0; /* ignore command: make trouble */ |
| } |
| if (likely(oip->pfp)) |
| pfp = oip->pfp; /* calls a resp_* function */ |
| else |
| pfp = r_pfp; /* if leaf function ptr NULL, try the root's */ |
| |
| fini: |
| if (F_DELAY_OVERR & flags) |
| return schedule_resp(scp, devip, errsts, pfp, 0, 0); |
| else if ((sdebug_jdelay || sdebug_ndelay) && (flags & F_LONG_DELAY)) { |
| /* |
| * If any delay is active, for F_SSU_DELAY want at least 1 |
| * second and if sdebug_jdelay>0 want a long delay of that |
| * many seconds; for F_SYNC_DELAY want 1/20 of that. |
| */ |
| int jdelay = (sdebug_jdelay < 2) ? 1 : sdebug_jdelay; |
| int denom = (flags & F_SYNC_DELAY) ? 20 : 1; |
| |
| jdelay = mult_frac(USER_HZ * jdelay, HZ, denom * USER_HZ); |
| return schedule_resp(scp, devip, errsts, pfp, jdelay, 0); |
| } else |
| return schedule_resp(scp, devip, errsts, pfp, sdebug_jdelay, |
| sdebug_ndelay); |
| check_cond: |
| return schedule_resp(scp, devip, check_condition_result, NULL, 0, 0); |
| err_out: |
| return schedule_resp(scp, NULL, DID_NO_CONNECT << 16, NULL, 0, 0); |
| } |
| |
| 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 = scsi_debug_queuecommand, |
| .change_queue_depth = sdebug_change_qdepth, |
| .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 = SDEBUG_CANQUEUE, |
| .this_id = 7, |
| .sg_tablesize = SG_MAX_SEGMENTS, |
| .cmd_per_lun = DEF_CMD_PER_LUN, |
| .max_sectors = -1U, |
| .use_clustering = DISABLE_CLUSTERING, |
| .module = THIS_MODULE, |
| .track_queue_depth = 1, |
| }; |
| |
| static int sdebug_driver_probe(struct device *dev) |
| { |
| int error = 0; |
| struct sdebug_host_info *sdbg_host; |
| struct Scsi_Host *hpnt; |
| int hprot; |
| |
| sdbg_host = to_sdebug_host(dev); |
| |
| sdebug_driver_template.can_queue = sdebug_max_queue; |
| if (sdebug_clustering) |
| sdebug_driver_template.use_clustering = ENABLE_CLUSTERING; |
| hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host)); |
| if (NULL == hpnt) { |
| pr_err("scsi_host_alloc failed\n"); |
| error = -ENODEV; |
| return error; |
| } |
| if (submit_queues > nr_cpu_ids) { |
| pr_warn("%s: trim submit_queues (was %d) to nr_cpu_ids=%u\n", |
| my_name, submit_queues, nr_cpu_ids); |
| submit_queues = nr_cpu_ids; |
| } |
| /* Decide whether to tell scsi subsystem that we want mq */ |
| /* Following should give the same answer for each host */ |
| if (shost_use_blk_mq(hpnt)) |
| hpnt->nr_hw_queues = submit_queues; |
| |
| sdbg_host->shost = hpnt; |
| *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host; |
| if ((hpnt->this_id >= 0) && (sdebug_num_tgts > hpnt->this_id)) |
| hpnt->max_id = sdebug_num_tgts + 1; |
| else |
| hpnt->max_id = sdebug_num_tgts; |
| /* = sdebug_max_luns; */ |
| hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1; |
| |
| hprot = 0; |
| |
| switch (sdebug_dif) { |
| |
| case T10_PI_TYPE1_PROTECTION: |
| hprot = SHOST_DIF_TYPE1_PROTECTION; |
| if (sdebug_dix) |
| hprot |= SHOST_DIX_TYPE1_PROTECTION; |
| break; |
| |
| case T10_PI_TYPE2_PROTECTION: |
| hprot = SHOST_DIF_TYPE2_PROTECTION; |
| if (sdebug_dix) |
| hprot |= SHOST_DIX_TYPE2_PROTECTION; |
| break; |
| |
| case T10_PI_TYPE3_PROTECTION: |
| hprot = SHOST_DIF_TYPE3_PROTECTION; |
| if (sdebug_dix) |
| hprot |= SHOST_DIX_TYPE3_PROTECTION; |
| break; |
| |
| default: |
| if (sdebug_dix) |
| hprot |= SHOST_DIX_TYPE0_PROTECTION; |
| break; |
| } |
| |
| scsi_host_set_prot(hpnt, hprot); |
| |
| if (have_dif_prot || sdebug_dix) |
| pr_info("host protection%s%s%s%s%s%s%s\n", |
| (hprot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "", |
| (hprot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "", |
| (hprot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "", |
| (hprot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "", |
| (hprot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "", |
| (hprot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "", |
| (hprot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : ""); |
| |
| if (sdebug_guard == 1) |
| scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP); |
| else |
| scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC); |
| |
| sdebug_verbose = !!(SDEBUG_OPT_NOISE & sdebug_opts); |
| sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & sdebug_opts); |
| if (sdebug_every_nth) /* need stats counters for every_nth */ |
| sdebug_statistics = true; |
| error = scsi_add_host(hpnt, &sdbg_host->dev); |
| if (error) { |
| pr_err("scsi_add_host failed\n"); |
| 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) { |
| pr_err("Unable to locate host info\n"); |
| 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, |
| }; |