--- /dev/null
+/*
+ * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
+ * Copyright (C) 1992 Eric Youngdale
+ * Simulate a host adapter with 2 disks attached. Do a lot of checking
+ * to make sure that we are not getting blocks mixed up, and PANIC if
+ * anything out of the ordinary is seen.
+ * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+ *
+ * This version is more generic, simulating a variable number of disk
+ * (or disk like devices) sharing a common amount of RAM. To be more
+ * realistic, the simulated devices have the transport attributes of
+ * SAS disks.
+ *
+ *
+ * For documentation see http://sg.danny.cz/sg/sdebug26.html
+ *
+ * D. Gilbert (dpg) work for Magneto-Optical device test [20010421]
+ * dpg: work for devfs large number of disks [20010809]
+ * forked for lk 2.5 series [20011216, 20020101]
+ * use vmalloc() more inquiry+mode_sense [20020302]
+ * add timers for delayed responses [20020721]
+ * Patrick Mansfield <patmans@us.ibm.com> max_luns+scsi_level [20021031]
+ * Mike Anderson <andmike@us.ibm.com> sysfs work [20021118]
+ * dpg: change style of boot options to "scsi_debug.num_tgts=2" and
+ * module options to "modprobe scsi_debug num_tgts=2" [20021221]
+ */
+
+#include <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/timer.h>
+#include <linux/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 <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"
+
+#define SCSI_DEBUG_VERSION "1.85"
+static const char *scsi_debug_version_date = "20141022";
+
+#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
+
+/* Additional Sense Code Qualifier (ASCQ) */
+#define ACK_NAK_TO 0x3
+
+
+/* Default values for driver parameters */
+#define DEF_NUM_HOST 1
+#define DEF_NUM_TGTS 1
+#define DEF_MAX_LUNS 1
+/* With these defaults, this driver will make 1 host with 1 target
+ * (id 0) containing 1 logical unit (lun 0). That is 1 device.
+ */
+#define DEF_ATO 1
+#define DEF_DELAY 1 /* if > 0 unit is a jiffy */
+#define DEF_DEV_SIZE_MB 8
+#define DEF_DIF 0
+#define DEF_DIX 0
+#define DEF_D_SENSE 0
+#define DEF_EVERY_NTH 0
+#define DEF_FAKE_RW 0
+#define DEF_GUARD 0
+#define DEF_HOST_LOCK 0
+#define DEF_LBPU 0
+#define DEF_LBPWS 0
+#define DEF_LBPWS10 0
+#define DEF_LBPRZ 1
+#define DEF_LOWEST_ALIGNED 0
+#define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
+#define DEF_NO_LUN_0 0
+#define DEF_NUM_PARTS 0
+#define DEF_OPTS 0
+#define DEF_OPT_BLKS 64
+#define DEF_PHYSBLK_EXP 0
+#define DEF_PTYPE 0
+#define DEF_REMOVABLE false
+#define DEF_SCSI_LEVEL 6 /* INQUIRY, byte2 [6->SPC-4] */
+#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 DELAY_OVERRIDDEN -9999
+
+/* bit mask values for scsi_debug_opts */
+#define SCSI_DEBUG_OPT_NOISE 1
+#define SCSI_DEBUG_OPT_MEDIUM_ERR 2
+#define SCSI_DEBUG_OPT_TIMEOUT 4
+#define SCSI_DEBUG_OPT_RECOVERED_ERR 8
+#define SCSI_DEBUG_OPT_TRANSPORT_ERR 16
+#define SCSI_DEBUG_OPT_DIF_ERR 32
+#define SCSI_DEBUG_OPT_DIX_ERR 64
+#define SCSI_DEBUG_OPT_MAC_TIMEOUT 128
+#define SCSI_DEBUG_OPT_SHORT_TRANSFER 0x100
+#define SCSI_DEBUG_OPT_Q_NOISE 0x200
+#define SCSI_DEBUG_OPT_ALL_TSF 0x400
+#define SCSI_DEBUG_OPT_RARE_TSF 0x800
+#define SCSI_DEBUG_OPT_N_WCE 0x1000
+#define SCSI_DEBUG_OPT_RESET_NOISE 0x2000
+#define SCSI_DEBUG_OPT_NO_CDB_NOISE 0x4000
+#define SCSI_DEBUG_OPT_ALL_NOISE (0x1 | 0x200 | 0x2000)
+/* When "every_nth" > 0 then modulo "every_nth" commands:
+ * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
+ * - a RECOVERED_ERROR is simulated on successful read and write
+ * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
+ * - a TRANSPORT_ERROR is simulated on successful read and write
+ * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
+ *
+ * When "every_nth" < 0 then after "- every_nth" commands:
+ * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
+ * - a RECOVERED_ERROR is simulated on successful read and write
+ * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
+ * - a TRANSPORT_ERROR is simulated on successful read and write
+ * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
+ * This will continue until some other action occurs (e.g. the user
+ * writing a new value (other than -1 or 1) to every_nth via sysfs).
+ */
+
+/* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs)are returned in
+ * priority order. In the subset implemented here lower numbers have higher
+ * priority. The UA numbers should be a sequence starting from 0 with
+ * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
+#define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
+#define SDEBUG_UA_BUS_RESET 1
+#define SDEBUG_UA_MODE_CHANGED 2
+#define SDEBUG_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
+
+/* for check_readiness() */
+#define UAS_ONLY 1 /* check for UAs only */
+#define UAS_TUR 0 /* if no UAs then check if media access possible */
+
+/* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
+ * sector on read commands: */
+#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
+#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
+
+/* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
+ * or "peripheral device" addressing (value 0) */
+#define SAM2_LUN_ADDRESS_METHOD 0
+#define SAM2_WLUN_REPORT_LUNS 0xc101
+
+/* SCSI_DEBUG_CANQUEUE is the maximum number of commands that can be queued
+ * (for response) at one time. Can be reduced by max_queue option. Command
+ * responses are not queued when delay=0 and ndelay=0. The per-device
+ * DEF_CMD_PER_LUN can be changed via sysfs:
+ * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth but cannot exceed
+ * SCSI_DEBUG_CANQUEUE. */
+#define SCSI_DEBUG_CANQUEUE_WORDS 9 /* a WORD is bits in a long */
+#define SCSI_DEBUG_CANQUEUE (SCSI_DEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
+#define DEF_CMD_PER_LUN 255
+
+#if DEF_CMD_PER_LUN > SCSI_DEBUG_CANQUEUE
+#warning "Expect DEF_CMD_PER_LUN <= SCSI_DEBUG_CANQUEUE"
+#endif
+
+/* SCSI opcodes (first byte of cdb) 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 = 12, /* 12, 16 */
+ SDEB_I_SERV_ACT_OUT = 13, /* 12, 16 */
+ SDEB_I_MAINT_IN = 14,
+ SDEB_I_MAINT_OUT = 15,
+ SDEB_I_VERIFY = 16, /* 10 only */
+ SDEB_I_VARIABLE_LEN = 17,
+ 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 only */
+ SDEB_I_COMP_WRITE = 29,
+ SDEB_I_LAST_ELEMENT = 30, /* keep this last */
+};
+
+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 */
+ 0, 0, 0, 0, 0, 0, 0, 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, 0, 0, SDEB_I_WRITE_SAME, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN, SDEB_I_SERV_ACT_OUT,
+/* 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, SDEB_I_SERV_ACT_OUT, SDEB_I_WRITE, SDEB_I_SERV_ACT_IN,
+ 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,
+};
+
+#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 FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
+#define FF_DIRECT_IO (F_M_ACCESS | F_FAKE_RW)
+#define FF_SA (F_SA_HIGH | F_SA_LOW)
+
+struct sdebug_dev_info;
+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_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 *);
+
+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=len_mask[0], then mask for cdb[1]... */
+ /* ignore cdb bytes after position 15 */
+};
+
+static const struct opcode_info_t msense_iarr[1] = {
+ {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[1] = {
+ {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[3] = {
+ {0, 0x28, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL,/* READ(10) */
+ {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
+ 0, 0, 0, 0} },
+ {0, 0x8, 0, F_D_IN | FF_DIRECT_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_DIRECT_IO, resp_read_dt0, NULL,/* READ(12) */
+ {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
+ 0xc7, 0, 0, 0, 0} },
+};
+
+static const struct opcode_info_t write_iarr[3] = {
+ {0, 0x2a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 10 */
+ {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
+ 0, 0, 0, 0} },
+ {0, 0xa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 6 */
+ {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
+ {0, 0xaa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 12 */
+ {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
+ 0xc7, 0, 0, 0, 0} },
+};
+
+static const struct opcode_info_t sa_in_iarr[1] = {
+ {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} },
+};
+
+static const struct opcode_info_t vl_iarr[1] = { /* VARIABLE LENGTH */
+ {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_DIRECT_IO, resp_write_dt0,
+ NULL, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0xb, 0xfa,
+ 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
+};
+
+static const struct opcode_info_t maint_in_iarr[2] = {
+ {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} },
+ {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} },
+};
+
+static const struct opcode_info_t write_same_iarr[1] = {
+ {0, 0x93, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_16, NULL,
+ {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0x1f, 0xc7} },
+};
+
+static const struct opcode_info_t reserve_iarr[1] = {
+ {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[1] = {
+ {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} },
+};
+
+
+/* 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,
+ {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,
+ {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} },
+ {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} },
+ {1, 0x5a, 0, F_D_IN, resp_mode_sense, msense_iarr,
+ {10, 0xf8, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
+ 0} },
+ {1, 0x55, 0, F_D_OUT, 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,
+ {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,
+ {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
+ 0, 0} },
+ {3, 0x88, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, read_iarr,
+ {16, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* READ(16) */
+/* 10 */
+ {3, 0x8a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, write_iarr,
+ {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* WRITE(16) */
+ {0, 0x1b, 0, 0, resp_start_stop, NULL, /* START STOP UNIT */
+ {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
+ {1, 0x9e, 0x10, F_SA_LOW | F_D_IN, resp_readcap16, sa_in_iarr,
+ {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0x1, 0xc7} }, /* READ CAPACITY(16) */
+ {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* SA OUT */
+ {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
+ {2, 0xa3, 0xa, F_SA_LOW | F_D_IN, resp_report_tgtpgs, maint_in_iarr,
+ {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 0,
+ 0} },
+ {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, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* VERIFY */
+ {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
+ {1, 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_DIRECT_IO, resp_read_dt0,
+ vl_iarr, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0x9, 0xfe, 0,
+ 0xff, 0xff, 0xff, 0xff} },/* VARIABLE LENGTH, READ(32) */
+ {1, 0x56, 0, F_D_OUT, NULL, reserve_iarr, /* RESERVE(10) */
+ {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
+ 0} },
+ {1, 0x57, 0, F_D_OUT, NULL, release_iarr, /* RELEASE(10) */
+ {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
+ 0} },
+/* 20 */
+ {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ALLOW REMOVAL */
+ {0, 0, 0, 0, 0, 0, 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_DIRECT_IO, resp_unmap, NULL, /* UNMAP */
+ {10, 0x1, 0, 0, 0, 0, 0x1f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
+ {0, 0x53, 0, F_D_IN | F_D_OUT | FF_DIRECT_IO, resp_xdwriteread_10,
+ NULL, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7,
+ 0, 0, 0, 0, 0, 0} },
+ {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 */
+ {1, 0x41, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_10,
+ write_same_iarr, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff,
+ 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
+ {0, 0x35, 0, F_DELAY_OVERR | FF_DIRECT_IO, NULL, NULL, /* SYNC_CACHE */
+ {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
+ 0, 0, 0, 0} },
+ {0, 0x89, 0, F_D_OUT | FF_DIRECT_IO, resp_comp_write, NULL,
+ {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
+ 0, 0xff, 0x1f, 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} },
+};
+
+struct sdebug_scmd_extra_t {
+ bool inj_recovered;
+ bool inj_transport;
+ bool inj_dif;
+ bool inj_dix;
+ bool inj_short;
+};
+
+static int scsi_debug_add_host = DEF_NUM_HOST;
+static int scsi_debug_ato = DEF_ATO;
+static int scsi_debug_delay = DEF_DELAY;
+static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
+static int scsi_debug_dif = DEF_DIF;
+static int scsi_debug_dix = DEF_DIX;
+static int scsi_debug_dsense = DEF_D_SENSE;
+static int scsi_debug_every_nth = DEF_EVERY_NTH;
+static int scsi_debug_fake_rw = DEF_FAKE_RW;
+static unsigned int scsi_debug_guard = DEF_GUARD;
+static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED;
+static int scsi_debug_max_luns = DEF_MAX_LUNS;
+static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE;
+static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
+static int scsi_debug_ndelay = DEF_NDELAY;
+static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
+static int scsi_debug_no_uld = 0;
+static int scsi_debug_num_parts = DEF_NUM_PARTS;
+static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */
+static int scsi_debug_opt_blks = DEF_OPT_BLKS;
+static int scsi_debug_opts = DEF_OPTS;
+static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP;
+static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
+static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
+static int scsi_debug_sector_size = DEF_SECTOR_SIZE;
+static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
+static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
+static unsigned int scsi_debug_lbpu = DEF_LBPU;
+static unsigned int scsi_debug_lbpws = DEF_LBPWS;
+static unsigned int scsi_debug_lbpws10 = DEF_LBPWS10;
+static unsigned int scsi_debug_lbprz = DEF_LBPRZ;
+static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
+static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY;
+static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
+static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
+static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH;
+static bool scsi_debug_removable = DEF_REMOVABLE;
+static bool scsi_debug_clustering;
+static bool scsi_debug_host_lock = DEF_HOST_LOCK;
+static bool scsi_debug_strict = DEF_STRICT;
+static bool sdebug_any_injecting_opt;
+
+static atomic_t sdebug_cmnd_count;
+static atomic_t sdebug_completions;
+static atomic_t sdebug_a_tsf; /* counter of 'almost' TSFs */
+
+#define DEV_READONLY(TGT) (0)
+
+static unsigned int sdebug_store_sectors;
+static sector_t sdebug_capacity; /* in sectors */
+
+/* old BIOS stuff, kernel may get rid of them but some mode sense pages
+ may still need them */
+static int sdebug_heads; /* heads per disk */
+static int sdebug_cylinders_per; /* cylinders per surface */
+static int sdebug_sectors_per; /* sectors per cylinder */
+
+#define SDEBUG_MAX_PARTS 4
+
+#define SCSI_DEBUG_MAX_CMD_LEN 32
+
+static unsigned int scsi_debug_lbp(void)
+{
+ return ((0 == scsi_debug_fake_rw) &&
+ (scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10));
+}
+
+struct sdebug_dev_info {
+ struct list_head dev_list;
+ unsigned int channel;
+ unsigned int target;
+ u64 lun;
+ struct sdebug_host_info *sdbg_host;
+ unsigned long uas_bm[1];
+ atomic_t num_in_q;
+ char stopped; /* TODO: should be atomic */
+ 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)
+
+static LIST_HEAD(sdebug_host_list);
+static DEFINE_SPINLOCK(sdebug_host_list_lock);
+
+
+struct sdebug_hrtimer { /* ... is derived from hrtimer */
+ struct hrtimer hrt; /* must be first element */
+ int qa_indx;
+};
+
+struct sdebug_queued_cmd {
+ /* in_use flagged by a bit in queued_in_use_bm[] */
+ struct timer_list *cmnd_timerp;
+ struct tasklet_struct *tletp;
+ struct sdebug_hrtimer *sd_hrtp;
+ struct scsi_cmnd * a_cmnd;
+};
+static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
+static unsigned long queued_in_use_bm[SCSI_DEBUG_CANQUEUE_WORDS];
+
+
+static unsigned char * fake_storep; /* ramdisk storage */
+static struct sd_dif_tuple *dif_storep; /* protection info */
+static void *map_storep; /* provisioning map */
+
+static unsigned long map_size;
+static int num_aborts;
+static int num_dev_resets;
+static int num_target_resets;
+static int num_bus_resets;
+static int num_host_resets;
+static int dix_writes;
+static int dix_reads;
+static int dif_errors;
+
+static DEFINE_SPINLOCK(queued_arr_lock);
+static DEFINE_RWLOCK(atomic_rw);
+
+static char sdebug_proc_name[] = MY_NAME;
+static const char *my_name = MY_NAME;
+
+static struct bus_type pseudo_lld_bus;
+
+static struct device_driver sdebug_driverfs_driver = {
+ .name = sdebug_proc_name,
+ .bus = &pseudo_lld_bus,
+};
+
+static const int check_condition_result =
+ (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
+
+static const int illegal_condition_result =
+ (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
+
+static const int device_qfull_result =
+ (DID_OK << 16) | (COMMAND_COMPLETE << 8) | SAM_STAT_TASK_SET_FULL;
+
+static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
+ 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
+ 0, 0, 0, 0};
+static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
+ 0, 0, 0x2, 0x4b};
+static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
+ 0, 0, 0x0, 0x0};
+
+static void *fake_store(unsigned long long lba)
+{
+ lba = do_div(lba, sdebug_store_sectors);
+
+ return fake_storep + lba * scsi_debug_sector_size;
+}
+
+static struct sd_dif_tuple *dif_store(sector_t sector)
+{
+ sector = do_div(sector, sdebug_store_sectors);
+
+ return dif_storep + sector;
+}
+
+static int sdebug_add_adapter(void);
+static void sdebug_remove_adapter(void);
+
+static void sdebug_max_tgts_luns(void)
+{
+ struct sdebug_host_info *sdbg_host;
+ struct Scsi_Host *hpnt;
+
+ spin_lock(&sdebug_host_list_lock);
+ list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
+ hpnt = sdbg_host->shost;
+ if ((hpnt->this_id >= 0) &&
+ (scsi_debug_num_tgts > hpnt->this_id))
+ hpnt->max_id = scsi_debug_num_tgts + 1;
+ else
+ hpnt->max_id = scsi_debug_num_tgts;
+ /* scsi_debug_max_luns; */
+ hpnt->max_lun = SAM2_WLUN_REPORT_LUNS;
+ }
+ spin_unlock(&sdebug_host_list_lock);
+}
+
+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(scsi_debug_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 (scsi_debug_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 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
+ 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(scsi_debug_dsense, sbuff, key, asc, asq);
+
+ if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
+ sdev_printk(KERN_INFO, scp->device,
+ "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
+ my_name, key, asc, asq);
+}
+
+static void
+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 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
+ if (0x1261 == cmd)
+ sdev_printk(KERN_INFO, dev,
+ "%s: BLKFLSBUF [0x1261]\n", __func__);
+ else if (0x5331 == cmd)
+ sdev_printk(KERN_INFO, dev,
+ "%s: CDROM_GET_CAPABILITY [0x5331]\n",
+ __func__);
+ else
+ sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
+ __func__, cmd);
+ }
+ return -EINVAL;
+ /* return -ENOTTY; // correct return but upsets fdisk */
+}
+
+static 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 check_readiness(struct scsi_cmnd *SCpnt, int uas_only,
+ struct sdebug_dev_info * devip)
+{
+ int k;
+ bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts);
+
+ k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
+ if (k != SDEBUG_NUM_UAS) {
+ const char *cp = NULL;
+
+ switch (k) {
+ case SDEBUG_UA_POR:
+ mk_sense_buffer(SCpnt, UNIT_ATTENTION,
+ UA_RESET_ASC, POWER_ON_RESET_ASCQ);
+ if (debug)
+ cp = "power on reset";
+ break;
+ case SDEBUG_UA_BUS_RESET:
+ mk_sense_buffer(SCpnt, UNIT_ATTENTION,
+ UA_RESET_ASC, BUS_RESET_ASCQ);
+ if (debug)
+ cp = "bus reset";
+ break;
+ case SDEBUG_UA_MODE_CHANGED:
+ mk_sense_buffer(SCpnt, UNIT_ATTENTION,
+ UA_CHANGED_ASC, MODE_CHANGED_ASCQ);
+ if (debug)
+ cp = "mode parameters changed";
+ break;
+ case SDEBUG_UA_CAPACITY_CHANGED:
+ mk_sense_buffer(SCpnt, UNIT_ATTENTION,
+ UA_CHANGED_ASC, CAPACITY_CHANGED_ASCQ);
+ if (debug)
+ cp = "capacity data changed";
+ break;
+ case SDEBUG_UA_MICROCODE_CHANGED:
+ mk_sense_buffer(SCpnt, UNIT_ATTENTION,
+ TARGET_CHANGED_ASC, MICROCODE_CHANGED_ASCQ);
+ if (debug)
+ cp = "microcode has been changed";
+ break;
+ case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
+ mk_sense_buffer(SCpnt, UNIT_ATTENTION,
+ TARGET_CHANGED_ASC,
+ MICROCODE_CHANGED_WO_RESET_ASCQ);
+ if (debug)
+ 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: scsi_debug_scsi_level does not use the same
+ * values as struct scsi_device->scsi_level.
+ */
+ if (scsi_debug_scsi_level >= 6) /* SPC-4 and above */
+ clear_luns_changed_on_target(devip);
+ mk_sense_buffer(SCpnt, UNIT_ATTENTION,
+ TARGET_CHANGED_ASC,
+ LUNS_CHANGED_ASCQ);
+ if (debug)
+ cp = "reported luns data has changed";
+ break;
+ default:
+ pr_warn("%s: unexpected unit attention code=%d\n",
+ __func__, k);
+ if (debug)
+ cp = "unknown";
+ break;
+ }
+ clear_bit(k, devip->uas_bm);
+ if (debug)
+ sdev_printk(KERN_INFO, SCpnt->device,
+ "%s reports: Unit attention: %s\n",
+ my_name, cp);
+ return check_condition_result;
+ }
+ if ((UAS_TUR == uas_only) && devip->stopped) {
+ mk_sense_buffer(SCpnt, NOT_READY, LOGICAL_UNIT_NOT_READY,
+ 0x2);
+ if (debug)
+ sdev_printk(KERN_INFO, SCpnt->device,
+ "%s reports: Not ready: %s\n", my_name,
+ "initializing command required");
+ return check_condition_result;
+ }
+ return 0;
+}
+
+/* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */
+static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
+ int arr_len)
+{
+ int act_len;
+ struct scsi_data_buffer *sdb = scsi_in(scp);
+
+ if (!sdb->length)
+ return 0;
+ if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
+ return (DID_ERROR << 16);
+
+ act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
+ arr, arr_len);
+ sdb->resid = scsi_bufflen(scp) - act_len;
+
+ return 0;
+}
+
+/* Returns number of bytes fetched into 'arr' or -1 if error. */
+static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
+ int arr_len)
+{
+ if (!scsi_bufflen(scp))
+ return 0;
+ if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
+ return -1;
+
+ return scsi_sg_copy_to_buffer(scp, arr, arr_len);
+}
+
+
+static const char * inq_vendor_id = "Linux ";
+static const char * inq_product_id = "scsi_debug ";
+static const char *inq_product_rev = "0184"; /* version less '.' */
+
+/* Device identification VPD page. Returns number of bytes placed in arr */
+static int inquiry_evpd_83(unsigned char * arr, int port_group_id,
+ int target_dev_id, int dev_id_num,
+ const char * dev_id_str,
+ int dev_id_str_len)
+{
+ int num, port_a;
+ char b[32];
+
+ port_a = target_dev_id + 1;
+ /* T10 vendor identifier field format (faked) */
+ arr[0] = 0x2; /* ASCII */
+ arr[1] = 0x1;
+ arr[2] = 0x0;
+ memcpy(&arr[4], inq_vendor_id, 8);
+ memcpy(&arr[12], inq_product_id, 16);
+ memcpy(&arr[28], dev_id_str, dev_id_str_len);
+ num = 8 + 16 + dev_id_str_len;
+ arr[3] = num;
+ num += 4;
+ if (dev_id_num >= 0) {
+ /* NAA-5, Logical unit identifier (binary) */
+ arr[num++] = 0x1; /* binary (not necessarily sas) */
+ arr[num++] = 0x3; /* PIV=0, lu, naa */
+ arr[num++] = 0x0;
+ arr[num++] = 0x8;
+ arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */
+ arr[num++] = 0x33;
+ arr[num++] = 0x33;
+ arr[num++] = 0x30;
+ arr[num++] = (dev_id_num >> 24);
+ arr[num++] = (dev_id_num >> 16) & 0xff;
+ arr[num++] = (dev_id_num >> 8) & 0xff;
+ arr[num++] = dev_id_num & 0xff;
+ /* Target relative port number */
+ arr[num++] = 0x61; /* proto=sas, binary */
+ arr[num++] = 0x94; /* PIV=1, target port, rel port */
+ arr[num++] = 0x0; /* reserved */
+ arr[num++] = 0x4; /* length */
+ arr[num++] = 0x0; /* reserved */
+ arr[num++] = 0x0; /* reserved */
+ arr[num++] = 0x0;
+ arr[num++] = 0x1; /* relative port A */
+ }
+ /* NAA-5, Target port identifier */
+ arr[num++] = 0x61; /* proto=sas, binary */
+ arr[num++] = 0x93; /* piv=1, target port, naa */
+ arr[num++] = 0x0;
+ arr[num++] = 0x8;
+ arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
+ arr[num++] = 0x22;
+ arr[num++] = 0x22;
+ arr[num++] = 0x20;
+ arr[num++] = (port_a >> 24);
+ arr[num++] = (port_a >> 16) & 0xff;
+ arr[num++] = (port_a >> 8) & 0xff;
+ arr[num++] = port_a & 0xff;
+ /* NAA-5, Target port group identifier */
+ arr[num++] = 0x61; /* proto=sas, binary */
+ arr[num++] = 0x95; /* piv=1, target port group id */
+ arr[num++] = 0x0;
+ arr[num++] = 0x4;
+ arr[num++] = 0;
+ arr[num++] = 0;
+ arr[num++] = (port_group_id >> 8) & 0xff;
+ arr[num++] = port_group_id & 0xff;
+ /* NAA-5, Target device identifier */
+ arr[num++] = 0x61; /* proto=sas, binary */
+ arr[num++] = 0xa3; /* piv=1, target device, naa */
+ arr[num++] = 0x0;
+ arr[num++] = 0x8;
+ arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
+ arr[num++] = 0x22;
+ arr[num++] = 0x22;
+ arr[num++] = 0x20;
+ arr[num++] = (target_dev_id >> 24);
+ arr[num++] = (target_dev_id >> 16) & 0xff;
+ arr[num++] = (target_dev_id >> 8) & 0xff;
+ arr[num++] = target_dev_id & 0xff;
+ /* SCSI name string: Target device identifier */
+ arr[num++] = 0x63; /* proto=sas, UTF-8 */
+ arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
+ arr[num++] = 0x0;
+ arr[num++] = 24;
+ memcpy(arr + num, "naa.52222220", 12);
+ num += 12;
+ snprintf(b, sizeof(b), "%08X", target_dev_id);
+ memcpy(arr + num, b, 8);
+ num += 8;
+ memset(arr + num, 0, 4);
+ num += 4;
+ return num;
+}
+
+
+static unsigned char vpd84_data[] = {
+/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
+ 0x22,0x22,0x22,0x0,0xbb,0x1,
+ 0x22,0x22,0x22,0x0,0xbb,0x2,
+};
+
+/* Software interface identification VPD page */
+static int inquiry_evpd_84(unsigned char * arr)
+{
+ memcpy(arr, vpd84_data, sizeof(vpd84_data));
+ return sizeof(vpd84_data);
+}
+
+/* Management network addresses VPD page */
+static int inquiry_evpd_85(unsigned char * arr)
+{
+ int num = 0;
+ const char * na1 = "https://www.kernel.org/config";
+ const char * na2 = "http://www.kernel.org/log";
+ int plen, olen;
+
+ arr[num++] = 0x1; /* lu, storage config */
+ arr[num++] = 0x0; /* reserved */
+ arr[num++] = 0x0;
+ olen = strlen(na1);
+ plen = olen + 1;
+ if (plen % 4)
+ plen = ((plen / 4) + 1) * 4;
+ arr[num++] = plen; /* length, null termianted, padded */
+ memcpy(arr + num, na1, olen);
+ memset(arr + num + olen, 0, plen - olen);
+ num += plen;
+
+ arr[num++] = 0x4; /* lu, logging */
+ arr[num++] = 0x0; /* reserved */
+ arr[num++] = 0x0;
+ olen = strlen(na2);
+ plen = olen + 1;
+ if (plen % 4)
+ plen = ((plen / 4) + 1) * 4;
+ arr[num++] = plen; /* length, null terminated, padded */
+ memcpy(arr + num, na2, olen);
+ memset(arr + num + olen, 0, plen - olen);
+ num += plen;
+
+ return num;
+}
+
+/* SCSI ports VPD page */
+static int inquiry_evpd_88(unsigned char * arr, int target_dev_id)
+{
+ int num = 0;
+ int port_a, port_b;
+
+ port_a = target_dev_id + 1;
+ port_b = port_a + 1;
+ arr[num++] = 0x0; /* reserved */
+ arr[num++] = 0x0; /* reserved */
+ arr[num++] = 0x0;
+ arr[num++] = 0x1; /* relative port 1 (primary) */
+ memset(arr + num, 0, 6);
+ num += 6;
+ arr[num++] = 0x0;
+ arr[num++] = 12; /* length tp descriptor */
+ /* naa-5 target port identifier (A) */
+ arr[num++] = 0x61; /* proto=sas, binary */
+ arr[num++] = 0x93; /* PIV=1, target port, NAA */
+ arr[num++] = 0x0; /* reserved */
+ arr[num++] = 0x8; /* length */
+ arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
+ arr[num++] = 0x22;
+ arr[num++] = 0x22;
+ arr[num++] = 0x20;
+ arr[num++] = (port_a >> 24);
+ arr[num++] = (port_a >> 16) & 0xff;
+ arr[num++] = (port_a >> 8) & 0xff;
+ arr[num++] = port_a & 0xff;
+
+ arr[num++] = 0x0; /* reserved */
+ arr[num++] = 0x0; /* reserved */
+ arr[num++] = 0x0;
+ arr[num++] = 0x2; /* relative port 2 (secondary) */
+ memset(arr + num, 0, 6);
+ num += 6;
+ arr[num++] = 0x0;
+ arr[num++] = 12; /* length tp descriptor */
+ /* naa-5 target port identifier (B) */
+ arr[num++] = 0x61; /* proto=sas, binary */
+ arr[num++] = 0x93; /* PIV=1, target port, NAA */
+ arr[num++] = 0x0; /* reserved */
+ arr[num++] = 0x8; /* length */
+ arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
+ arr[num++] = 0x22;
+ arr[num++] = 0x22;
+ arr[num++] = 0x20;
+ arr[num++] = (port_b >> 24);
+ arr[num++] = (port_b >> 16) & 0xff;
+ arr[num++] = (port_b >> 8) & 0xff;
+ arr[num++] = port_b & 0xff;
+
+ return num;
+}
+
+
+static unsigned char vpd89_data[] = {
+/* from 4th byte */ 0,0,0,0,
+'l','i','n','u','x',' ',' ',' ',
+'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
+'1','2','3','4',
+0x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
+0xec,0,0,0,
+0x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
+0,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
+0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
+0x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
+0x53,0x41,
+0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
+0x20,0x20,
+0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
+0x10,0x80,
+0,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
+0x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
+0x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
+0x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
+0x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
+0,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
+0,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
+0xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
+0,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
+};
+
+/* ATA Information VPD page */
+static int inquiry_evpd_89(unsigned char * arr)
+{
+ memcpy(arr, vpd89_data, sizeof(vpd89_data));
+ return sizeof(vpd89_data);
+}
+
+
+static unsigned char vpdb0_data[] = {
+ /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+};
+
+/* Block limits VPD page (SBC-3) */
+static int inquiry_evpd_b0(unsigned char * arr)
+{
+ unsigned int gran;
+
+ memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
+
+ /* Optimal transfer length granularity */
+ gran = 1 << scsi_debug_physblk_exp;
+ arr[2] = (gran >> 8) & 0xff;
+ arr[3] = gran & 0xff;
+
+ /* Maximum Transfer Length */
+ if (sdebug_store_sectors > 0x400) {
+ arr[4] = (sdebug_store_sectors >> 24) & 0xff;
+ arr[5] = (sdebug_store_sectors >> 16) & 0xff;
+ arr[6] = (sdebug_store_sectors >> 8) & 0xff;
+ arr[7] = sdebug_store_sectors & 0xff;
+ }
+
+ /* Optimal Transfer Length */
+ put_unaligned_be32(scsi_debug_opt_blks, &arr[8]);
+
+ if (scsi_debug_lbpu) {
+ /* Maximum Unmap LBA Count */
+ put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]);
+
+ /* Maximum Unmap Block Descriptor Count */
+ put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]);
+ }
+
+ /* Unmap Granularity Alignment */
+ if (scsi_debug_unmap_alignment) {
+ put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]);
+ arr[28] |= 0x80; /* UGAVALID */
+ }
+
+ /* Optimal Unmap Granularity */
+ put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]);
+
+ /* Maximum WRITE SAME Length */
+ put_unaligned_be64(scsi_debug_write_same_length, &arr[32]);
+
+ return 0x3c; /* Mandatory page length for Logical Block Provisioning */
+
+ return sizeof(vpdb0_data);
+}
+
+/* Block device characteristics VPD page (SBC-3) */
+static int inquiry_evpd_b1(unsigned char *arr)
+{
+ memset(arr, 0, 0x3c);
+ arr[0] = 0;
+ arr[1] = 1; /* non rotating medium (e.g. solid state) */
+ arr[2] = 0;
+ arr[3] = 5; /* less than 1.8" */
+
+ return 0x3c;
+}
+
+/* Logical block provisioning VPD page (SBC-3) */
+static int inquiry_evpd_b2(unsigned char *arr)
+{
+ memset(arr, 0, 0x4);
+ arr[0] = 0; /* threshold exponent */
+
+ if (scsi_debug_lbpu)
+ arr[1] = 1 << 7;
+
+ if (scsi_debug_lbpws)
+ arr[1] |= 1 << 6;
+
+ if (scsi_debug_lbpws10)
+ arr[1] |= 1 << 5;
+
+ if (scsi_debug_lbprz)
+ arr[1] |= 1 << 2;
+
+ return 0x4;
+}
+
+#define SDEBUG_LONG_INQ_SZ 96
+#define SDEBUG_MAX_INQ_ARR_SZ 584
+
+static int resp_inquiry(struct scsi_cmnd *scp, 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;
+
+ alloc_len = (cmd[3] << 8) + cmd[4];
+ arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
+ if (! arr)
+ return DID_REQUEUE << 16;
+ have_wlun = (scp->device->lun == SAM2_WLUN_REPORT_LUNS);
+ if (have_wlun)
+ pq_pdt = 0x1e; /* present, wlun */
+ else if (scsi_debug_no_lun_0 && (0 == devip->lun))
+ pq_pdt = 0x7f; /* not present, no device type */
+ else
+ pq_pdt = (scsi_debug_ptype & 0x1f);
+ arr[0] = pq_pdt;
+ if (0x2 & cmd[1]) { /* CMDDT bit set */
+ mk_sense_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 (0 == scsi_debug_vpd_use_hostno)
+ 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 */
+ arr[n++] = 0x89; /* ATA information */
+ arr[n++] = 0xb0; /* Block limits (SBC) */
+ arr[n++] = 0xb1; /* Block characteristics (SBC) */
+ if (scsi_debug_lbp()) /* Logical Block Prov. (SBC) */
+ arr[n++] = 0xb2;
+ arr[3] = n - 4; /* number of supported VPD pages */
+ } else if (0x80 == cmd[2]) { /* unit serial number */
+ arr[1] = cmd[2]; /*sanity */
+ arr[3] = len;
+ memcpy(&arr[4], lu_id_str, len);
+ } else if (0x83 == cmd[2]) { /* device identification */
+ arr[1] = cmd[2]; /*sanity */
+ arr[3] = inquiry_evpd_83(&arr[4], port_group_id,
+ target_dev_id, lu_id_num,
+ lu_id_str, len);
+ } else if (0x84 == cmd[2]) { /* Software interface ident. */
+ arr[1] = cmd[2]; /*sanity */
+ arr[3] = inquiry_evpd_84(&arr[4]);
+ } else if (0x85 == cmd[2]) { /* Management network addresses */
+ arr[1] = cmd[2]; /*sanity */
+ arr[3] = inquiry_evpd_85(&arr[4]);
+ } else if (0x86 == cmd[2]) { /* extended inquiry */
+ arr[1] = cmd[2]; /*sanity */
+ arr[3] = 0x3c; /* number of following entries */
+ if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION)
+ arr[4] = 0x4; /* SPT: GRD_CHK:1 */
+ else if (scsi_debug_dif)
+ arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
+ else
+ arr[4] = 0x0; /* no protection stuff */
+ arr[5] = 0x7; /* head of q, ordered + simple q's */
+ } else if (0x87 == cmd[2]) { /* mode page policy */
+ arr[1] = cmd[2]; /*sanity */
+ arr[3] = 0x8; /* number of following entries */
+ arr[4] = 0x2; /* disconnect-reconnect mp */
+ arr[6] = 0x80; /* mlus, shared */
+ arr[8] = 0x18; /* protocol specific lu */
+ arr[10] = 0x82; /* mlus, per initiator port */
+ } else if (0x88 == cmd[2]) { /* SCSI Ports */
+ arr[1] = cmd[2]; /*sanity */
+ arr[3] = inquiry_evpd_88(&arr[4], target_dev_id);
+ } else if (0x89 == cmd[2]) { /* ATA information */
+ arr[1] = cmd[2]; /*sanity */
+ n = inquiry_evpd_89(&arr[4]);
+ arr[2] = (n >> 8);
+ arr[3] = (n & 0xff);
+ } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */
+ arr[1] = cmd[2]; /*sanity */
+ arr[3] = inquiry_evpd_b0(&arr[4]);
+ } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */
+ arr[1] = cmd[2]; /*sanity */
+ arr[3] = inquiry_evpd_b1(&arr[4]);
+ } else if (0xb2 == cmd[2]) { /* Logical Block Prov. (SBC) */
+ arr[1] = cmd[2]; /*sanity */
+ arr[3] = inquiry_evpd_b2(&arr[4]);
+ } else {
+ mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
+ kfree(arr);
+ return check_condition_result;
+ }
+ len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
+ ret = fill_from_dev_buffer(scp, arr,
+ min(len, SDEBUG_MAX_INQ_ARR_SZ));
+ kfree(arr);
+ return ret;
+ }
+ /* drops through here for a standard inquiry */
+ arr[1] = scsi_debug_removable ? 0x80 : 0; /* Removable disk */
+ arr[2] = scsi_debug_scsi_level;
+ arr[3] = 2; /* response_data_format==2 */
+ arr[4] = SDEBUG_LONG_INQ_SZ - 5;
+ arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */
+ if (0 == scsi_debug_vpd_use_hostno)
+ arr[5] = 0x10; /* claim: implicit TGPS */
+ arr[6] = 0x10; /* claim: MultiP */
+ /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
+ arr[7] = 0xa; /* claim: LINKED + CMDQUE */
+ memcpy(&arr[8], inq_vendor_id, 8);
+ memcpy(&arr[16], inq_product_id, 16);
+ memcpy(&arr[32], inq_product_rev, 4);
+ /* version descriptors (2 bytes each) follow */
+ arr[58] = 0x0; arr[59] = 0xa2; /* SAM-5 rev 4 */
+ arr[60] = 0x4; arr[61] = 0x68; /* SPC-4 rev 37 */
+ n = 62;
+ if (scsi_debug_ptype == 0) {
+ arr[n++] = 0x4; arr[n++] = 0xc5; /* SBC-4 rev 36 */
+ } else if (scsi_debug_ptype == 1) {
+ arr[n++] = 0x5; arr[n++] = 0x25; /* SSC-4 rev 3 */
+ }
+ arr[n++] = 0x20; arr[n++] = 0xe6; /* SPL-3 rev 7 */
+ ret = fill_from_dev_buffer(scp, arr,
+ min(alloc_len, SDEBUG_LONG_INQ_SZ));
+ kfree(arr);
+ return ret;
+}
+
+static int resp_requests(struct scsi_cmnd * scp,
+ struct sdebug_dev_info * devip)
+{
+ unsigned char * sbuff;
+ unsigned char *cmd = scp->cmnd;
+ unsigned char arr[SCSI_SENSE_BUFFERSIZE];
+ bool dsense, want_dsense;
+ int len = 18;
+
+ memset(arr, 0, sizeof(arr));
+ dsense = !!(cmd[1] & 1);
+ want_dsense = dsense || scsi_debug_dsense;
+ 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 == scsi_debug_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, start;
+
+ power_cond = (cmd[4] & 0xf0) >> 4;
+ if (power_cond) {
+ mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
+ return check_condition_result;
+ }
+ start = cmd[4] & 1;
+ if (start == devip->stopped)
+ devip->stopped = !start;
+ return 0;
+}
+
+static sector_t get_sdebug_capacity(void)
+{
+ if (scsi_debug_virtual_gb > 0)
+ return (sector_t)scsi_debug_virtual_gb *
+ (1073741824 / scsi_debug_sector_size);
+ else
+ return sdebug_store_sectors;
+}
+
+#define SDEBUG_READCAP_ARR_SZ 8
+static int resp_readcap(struct scsi_cmnd * scp,
+ struct sdebug_dev_info * devip)
+{
+ unsigned char arr[SDEBUG_READCAP_ARR_SZ];
+ unsigned int capac;
+
+ /* following just in case virtual_gb changed */
+ sdebug_capacity = get_sdebug_capacity();
+ memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
+ if (sdebug_capacity < 0xffffffff) {
+ capac = (unsigned int)sdebug_capacity - 1;
+ arr[0] = (capac >> 24);
+ arr[1] = (capac >> 16) & 0xff;
+ arr[2] = (capac >> 8) & 0xff;
+ arr[3] = capac & 0xff;
+ } else {
+ arr[0] = 0xff;
+ arr[1] = 0xff;
+ arr[2] = 0xff;
+ arr[3] = 0xff;
+ }
+ arr[6] = (scsi_debug_sector_size >> 8) & 0xff;
+ arr[7] = scsi_debug_sector_size & 0xff;
+ return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
+}
+
+#define SDEBUG_READCAP16_ARR_SZ 32
+static int resp_readcap16(struct scsi_cmnd * scp,
+ struct sdebug_dev_info * devip)
+{
+ unsigned char *cmd = scp->cmnd;
+ unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
+ unsigned long long capac;
+ int k, alloc_len;
+
+ alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8)
+ + cmd[13]);
+ /* following just in case virtual_gb changed */
+ sdebug_capacity = get_sdebug_capacity();
+ memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
+ capac = sdebug_capacity - 1;
+ for (k = 0; k < 8; ++k, capac >>= 8)
+ arr[7 - k] = capac & 0xff;
+ arr[8] = (scsi_debug_sector_size >> 24) & 0xff;
+ arr[9] = (scsi_debug_sector_size >> 16) & 0xff;
+ arr[10] = (scsi_debug_sector_size >> 8) & 0xff;
+ arr[11] = scsi_debug_sector_size & 0xff;
+ arr[13] = scsi_debug_physblk_exp & 0xf;
+ arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f;
+
+ if (scsi_debug_lbp()) {
+ arr[14] |= 0x80; /* LBPME */
+ if (scsi_debug_lbprz)
+ arr[14] |= 0x40; /* LBPRZ */
+ }
+
+ arr[15] = scsi_debug_lowest_aligned & 0xff;
+
+ if (scsi_debug_dif) {
+ arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */
+ arr[12] |= 1; /* PROT_EN */
+ }
+
+ return fill_from_dev_buffer(scp, arr,
+ min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
+}
+
+#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
+
+static int resp_report_tgtpgs(struct scsi_cmnd * scp,
+ struct sdebug_dev_info * devip)
+{
+ unsigned char *cmd = scp->cmnd;
+ unsigned char * arr;
+ int host_no = devip->sdbg_host->shost->host_no;
+ int n, ret, alen, rlen;
+ int port_group_a, port_group_b, port_a, port_b;
+
+ alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8)
+ + cmd[9]);
+
+ arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
+ if (! arr)
+ return DID_REQUEUE << 16;
+ /*
+ * EVPD page 0x88 states we have two ports, one
+ * real and a fake port with no device connected.
+ * So we create two port groups with one port each
+ * and set the group with port B to unavailable.
+ */
+ port_a = 0x1; /* relative port A */
+ port_b = 0x2; /* relative port B */
+ port_group_a = (((host_no + 1) & 0x7f) << 8) +
+ (devip->channel & 0x7f);
+ port_group_b = (((host_no + 1) & 0x7f) << 8) +
+ (devip->channel & 0x7f) + 0x80;
+
+ /*
+ * The asymmetric access state is cycled according to the host_id.
+ */
+ n = 4;
+ if (0 == scsi_debug_vpd_use_hostno) {
+ arr[n++] = host_no % 3; /* Asymm access state */
+ arr[n++] = 0x0F; /* claim: all states are supported */
+ } else {
+ arr[n++] = 0x0; /* Active/Optimized path */
+ arr[n++] = 0x01; /* claim: only support active/optimized paths */
+ }
+ arr[n++] = (port_group_a >> 8) & 0xff;
+ arr[n++] = port_group_a & 0xff;
+ arr[n++] = 0; /* Reserved */
+ arr[n++] = 0; /* Status code */
+ arr[n++] = 0; /* Vendor unique */
+ arr[n++] = 0x1; /* One port per group */
+ arr[n++] = 0; /* Reserved */
+ arr[n++] = 0; /* Reserved */
+ arr[n++] = (port_a >> 8) & 0xff;
+ arr[n++] = port_a & 0xff;
+ arr[n++] = 3; /* Port unavailable */
+ arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
+ arr[n++] = (port_group_b >> 8) & 0xff;
+ arr[n++] = port_group_b & 0xff;
+ arr[n++] = 0; /* Reserved */
+ arr[n++] = 0; /* Status code */
+ arr[n++] = 0; /* Vendor unique */
+ arr[n++] = 0x1; /* One port per group */
+ arr[n++] = 0; /* Reserved */
+ arr[n++] = 0; /* Reserved */
+ arr[n++] = (port_b >> 8) & 0xff;
+ arr[n++] = port_b & 0xff;
+
+ rlen = n - 4;
+ arr[0] = (rlen >> 24) & 0xff;
+ arr[1] = (rlen >> 16) & 0xff;
+ arr[2] = (rlen >> 8) & 0xff;
+ arr[3] = rlen & 0xff;
+
+ /*
+ * Return the smallest value of either
+ * - The allocated length
+ * - The constructed command length
+ * - The maximum array size
+ */
+ rlen = min(alen,n);
+ ret = fill_from_dev_buffer(scp, arr,
+ min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
+ kfree(arr);
+ return ret;
+}
+
+static int
+resp_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));
+ p[10] = (sdebug_sectors_per >> 8) & 0xff;
+ p[11] = sdebug_sectors_per & 0xff;
+ p[12] = (scsi_debug_sector_size >> 8) & 0xff;
+ p[13] = scsi_debug_sector_size & 0xff;
+ if (scsi_debug_removable)
+ p[20] |= 0x20; /* should agree with INQUIRY */
+ if (1 == pcontrol)
+ memset(p + 2, 0, sizeof(format_pg) - 2);
+ return sizeof(format_pg);
+}
+
+static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
+{ /* Caching page for mode_sense */
+ unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+ unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
+ 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
+
+ if (SCSI_DEBUG_OPT_N_WCE & scsi_debug_opts)
+ caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
+ memcpy(p, caching_pg, sizeof(caching_pg));
+ if (1 == pcontrol)
+ memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
+ else if (2 == pcontrol)
+ memcpy(p, d_caching_pg, sizeof(d_caching_pg));
+ return sizeof(caching_pg);
+}
+
+static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
+{ /* Control mode page for mode_sense */
+ unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0};
+ unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
+ 0, 0, 0x2, 0x4b};
+
+ if (scsi_debug_dsense)
+ ctrl_m_pg[2] |= 0x4;
+ else
+ ctrl_m_pg[2] &= ~0x4;
+
+ if (scsi_debug_ato)
+ ctrl_m_pg[5] |= 0x80; /* ATO=1 */
+
+ memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
+ if (1 == pcontrol)
+ memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
+ else if (2 == pcontrol)
+ memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
+ return sizeof(ctrl_m_pg);
+}
+
+
+static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target)
+{ /* Informational Exceptions control mode page for mode_sense */
+ unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
+ 0, 0, 0x0, 0x0};
+ unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
+ 0, 0, 0x0, 0x0};
+
+ memcpy(p, iec_m_pg, sizeof(iec_m_pg));
+ if (1 == pcontrol)
+ memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
+ else if (2 == pcontrol)
+ memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
+ return sizeof(iec_m_pg);
+}
+
+static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target)
+{ /* SAS SSP mode page - short format for mode_sense */
+ unsigned char sas_sf_m_pg[] = {0x19, 0x6,
+ 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
+
+ memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
+ if (1 == pcontrol)
+ memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
+ return sizeof(sas_sf_m_pg);
+}
+
+
+static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target,
+ int target_dev_id)
+{ /* SAS phy control and discover mode page for mode_sense */
+ unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
+ 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
+ 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
+ 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
+ 0x2, 0, 0, 0, 0, 0, 0, 0,
+ 0x88, 0x99, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
+ 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
+ 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
+ 0x3, 0, 0, 0, 0, 0, 0, 0,
+ 0x88, 0x99, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ };
+ int port_a, port_b;
+
+ port_a = target_dev_id + 1;
+ port_b = port_a + 1;
+ memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
+ p[20] = (port_a >> 24);
+ p[21] = (port_a >> 16) & 0xff;
+ p[22] = (port_a >> 8) & 0xff;
+ p[23] = port_a & 0xff;
+ p[48 + 20] = (port_b >> 24);
+ p[48 + 21] = (port_b >> 16) & 0xff;
+ p[48 + 22] = (port_b >> 8) & 0xff;
+ p[48 + 23] = port_b & 0xff;
+ if (1 == pcontrol)
+ memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
+ return sizeof(sas_pcd_m_pg);
+}
+
+static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
+{ /* SAS SSP shared protocol specific port mode subpage */
+ unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ };
+
+ memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
+ if (1 == pcontrol)
+ memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
+ return sizeof(sas_sha_m_pg);
+}
+
+#define SDEBUG_MAX_MSENSE_SZ 256
+
+static int
+resp_mode_sense(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
+{
+ unsigned char dbd, llbaa;
+ int pcontrol, pcode, subpcode, bd_len;
+ unsigned char dev_spec;
+ int k, alloc_len, msense_6, offset, len, target_dev_id;
+ int target = scp->device->id;
+ unsigned char * ap;
+ unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
+ unsigned char *cmd = scp->cmnd;
+
+ dbd = !!(cmd[1] & 0x8);
+ pcontrol = (cmd[2] & 0xc0) >> 6;
+ pcode = cmd[2] & 0x3f;
+ subpcode = cmd[3];
+ msense_6 = (MODE_SENSE == cmd[0]);
+ llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10);
+ if ((0 == scsi_debug_ptype) && (0 == dbd))
+ bd_len = llbaa ? 16 : 8;
+ else
+ bd_len = 0;
+ alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
+ memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
+ if (0x3 == pcontrol) { /* Saving values not supported */
+ mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
+ return check_condition_result;
+ }
+ target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
+ (devip->target * 1000) - 3;
+ /* set DPOFUA bit for disks */
+ if (0 == scsi_debug_ptype)
+ dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10;
+ else
+ dev_spec = 0x0;
+ if (msense_6) {
+ arr[2] = dev_spec;
+ arr[3] = bd_len;
+ offset = 4;
+ } else {
+ arr[3] = dev_spec;
+ if (16 == bd_len)
+ arr[4] = 0x1; /* set LONGLBA bit */
+ arr[7] = bd_len; /* assume 255 or less */
+ offset = 8;
+ }
+ ap = arr + offset;
+ if ((bd_len > 0) && (!sdebug_capacity))
+ sdebug_capacity = get_sdebug_capacity();
+
+ if (8 == bd_len) {
+ if (sdebug_capacity > 0xfffffffe) {
+ ap[0] = 0xff;
+ ap[1] = 0xff;
+ ap[2] = 0xff;
+ ap[3] = 0xff;
+ } else {
+ ap[0] = (sdebug_capacity >> 24) & 0xff;
+ ap[1] = (sdebug_capacity >> 16) & 0xff;
+ ap[2] = (sdebug_capacity >> 8) & 0xff;
+ ap[3] = sdebug_capacity & 0xff;
+ }
+ ap[6] = (scsi_debug_sector_size >> 8) & 0xff;
+ ap[7] = scsi_debug_sector_size & 0xff;
+ offset += bd_len;
+ ap = arr + offset;
+ } else if (16 == bd_len) {
+ unsigned long long capac = sdebug_capacity;
+
+ for (k = 0; k < 8; ++k, capac >>= 8)
+ ap[7 - k] = capac & 0xff;
+ ap[12] = (scsi_debug_sector_size >> 24) & 0xff;
+ ap[13] = (scsi_debug_sector_size >> 16) & 0xff;
+ ap[14] = (scsi_debug_sector_size >> 8) & 0xff;
+ ap[15] = scsi_debug_sector_size & 0xff;
+ offset += bd_len;
+ ap = arr + offset;
+ }
+
+ if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
+ /* TODO: Control Extension page */
+ mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
+ return check_condition_result;
+ }
+ switch (pcode) {
+ case 0x1: /* Read-Write error recovery page, direct access */
+ len = resp_err_recov_pg(ap, pcontrol, target);
+ offset += len;
+ break;
+ case 0x2: /* Disconnect-Reconnect page, all devices */
+ len = resp_disconnect_pg(ap, pcontrol, target);
+ offset += len;
+ break;
+ case 0x3: /* Format device page, direct access */
+ len = resp_format_pg(ap, pcontrol, target);
+ offset += len;
+ break;
+ case 0x8: /* Caching page, direct access */
+ len = resp_caching_pg(ap, pcontrol, target);
+ offset += len;
+ break;
+ case 0xa: /* Control Mode page, all devices */
+ len = resp_ctrl_m_pg(ap, pcontrol, target);
+ offset += len;
+ break;
+ case 0x19: /* if spc==1 then sas phy, control+discover */
+ if ((subpcode > 0x2) && (subpcode < 0xff)) {
+ mk_sense_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);
+ len += resp_format_pg(ap + len, pcontrol, target);
+ len += resp_caching_pg(ap + len, pcontrol, target);
+ len += resp_ctrl_m_pg(ap + len, pcontrol, target);
+ len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
+ if (0xff == subpcode) {
+ len += resp_sas_pcd_m_spg(ap + len, pcontrol,
+ target, target_dev_id);
+ len += resp_sas_sha_m_spg(ap + len, pcontrol);
+ }
+ len += resp_iec_m_pg(ap + len, pcontrol, target);
+ } else {
+ mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
+ return check_condition_result;
+ }
+ offset += len;
+ break;
+ default:
+ mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
+ return check_condition_result;
+ }
+ if (msense_6)
+ arr[0] = offset - 1;
+ else {
+ arr[0] = ((offset - 2) >> 8) & 0xff;
+ arr[1] = (offset - 2) & 0xff;
+ }
+ return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
+}
+
+#define SDEBUG_MAX_MSELECT_SZ 512
+
+static int
+resp_mode_select(struct scsi_cmnd *scp, 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] : ((cmd[7] << 8) + cmd[8]);
+ 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 ((res < param_len) &&
+ (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
+ sdev_printk(KERN_INFO, scp->device,
+ "%s: cdb indicated=%d, IO sent=%d bytes\n",
+ __func__, param_len, res);
+ md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2);
+ bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]);
+ if (md_len > 2) {
+ mk_sense_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 ? ((arr[off + 2] << 8) + arr[off + 3] + 4) :
+ (arr[off + 1] + 2);
+ if ((pg_len + off) > param_len) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST,
+ PARAMETER_LIST_LENGTH_ERR, 0);
+ return check_condition_result;
+ }
+ switch (mpage) {
+ case 0x8: /* Caching Mode page */
+ if (caching_pg[1] == arr[off + 1]) {
+ memcpy(caching_pg + 2, arr + off + 2,
+ sizeof(caching_pg) - 2);
+ goto set_mode_changed_ua;
+ }
+ break;
+ case 0xa: /* Control Mode page */
+ if (ctrl_m_pg[1] == arr[off + 1]) {
+ memcpy(ctrl_m_pg + 2, arr + off + 2,
+ sizeof(ctrl_m_pg) - 2);
+ scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4);
+ goto set_mode_changed_ua;
+ }
+ break;
+ case 0x1c: /* Informational Exceptions Mode page */
+ if (iec_m_pg[1] == arr[off + 1]) {
+ memcpy(iec_m_pg + 2, arr + off + 2,
+ sizeof(iec_m_pg) - 2);
+ goto set_mode_changed_ua;
+ }
+ break;
+ default:
+ break;
+ }
+ mk_sense_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, pcontrol, 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;
+ }
+ pcontrol = (cmd[2] & 0xc0) >> 6;
+ pcode = cmd[2] & 0x3f;
+ subpcode = cmd[3] & 0xff;
+ alloc_len = (cmd[7] << 8) + cmd[8];
+ arr[0] = pcode;
+ if (0 == subpcode) {
+ switch (pcode) {
+ case 0x0: /* Supported log pages log page */
+ n = 4;
+ arr[n++] = 0x0; /* this page */
+ arr[n++] = 0xd; /* Temperature */
+ arr[n++] = 0x2f; /* Informational exceptions */
+ arr[3] = n - 4;
+ break;
+ case 0xd: /* Temperature log page */
+ arr[3] = resp_temp_l_pg(arr + 4);
+ break;
+ case 0x2f: /* Informational exceptions log page */
+ arr[3] = resp_ie_l_pg(arr + 4);
+ break;
+ default:
+ mk_sense_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(((arr[2] << 8) + arr[3]) + 4, alloc_len);
+ return fill_from_dev_buffer(scp, arr,
+ min(len, SDEBUG_MAX_INQ_ARR_SZ));
+}
+
+static int check_device_access_params(struct scsi_cmnd *scp,
+ unsigned long long lba, unsigned int num)
+{
+ if (lba + num > sdebug_capacity) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST, 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, u64 lba, u32 num, bool do_write)
+{
+ int ret;
+ u64 block, rest = 0;
+ struct scsi_data_buffer *sdb;
+ enum dma_data_direction dir;
+ size_t (*func)(struct scatterlist *, unsigned int, void *, size_t,
+ off_t);
+
+ if (do_write) {
+ sdb = scsi_out(scmd);
+ dir = DMA_TO_DEVICE;
+ func = sg_pcopy_to_buffer;
+ } else {
+ sdb = scsi_in(scmd);
+ dir = DMA_FROM_DEVICE;
+ func = sg_pcopy_from_buffer;
+ }
+
+ if (!sdb->length)
+ return 0;
+ if (!(scsi_bidi_cmnd(scmd) || scmd->sc_data_direction == dir))
+ return -1;
+
+ block = do_div(lba, sdebug_store_sectors);
+ if (block + num > sdebug_store_sectors)
+ rest = block + num - sdebug_store_sectors;
+
+ ret = func(sdb->table.sgl, sdb->table.nents,
+ fake_storep + (block * scsi_debug_sector_size),
+ (num - rest) * scsi_debug_sector_size, 0);
+ if (ret != (num - rest) * scsi_debug_sector_size)
+ return ret;
+
+ if (rest) {
+ ret += func(sdb->table.sgl, sdb->table.nents,
+ fake_storep, rest * scsi_debug_sector_size,
+ (num - rest) * scsi_debug_sector_size);
+ }
+
+ return ret;
+}
+
+/* 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 = scsi_debug_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 (scsi_debug_guard)
+ csum = (__force __be16)ip_compute_csum(buf, len);
+ else
+ csum = cpu_to_be16(crc_t10dif(buf, len));
+
+ return csum;
+}
+
+static int dif_verify(struct sd_dif_tuple *sdt, const void *data,
+ sector_t sector, u32 ei_lba)
+{
+ __be16 csum = dif_compute_csum(data, scsi_debug_sector_size);
+
+ if (sdt->guard_tag != csum) {
+ pr_err("%s: GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
+ __func__,
+ (unsigned long)sector,
+ be16_to_cpu(sdt->guard_tag),
+ be16_to_cpu(csum));
+ return 0x01;
+ }
+ if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
+ be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
+ pr_err("%s: REF check failed on sector %lu\n",
+ __func__, (unsigned long)sector);
+ return 0x03;
+ }
+ if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
+ be32_to_cpu(sdt->ref_tag) != ei_lba) {
+ pr_err("%s: REF check failed on sector %lu\n",
+ __func__, (unsigned long)sector);
+ return 0x03;
+ }
+ return 0;
+}
+
+static void dif_copy_prot(struct scsi_cmnd *SCpnt, sector_t sector,
+ unsigned int sectors, bool read)
+{
+ size_t resid;
+ void *paddr;
+ const void *dif_store_end = dif_storep + sdebug_store_sectors;
+ struct sg_mapping_iter miter;
+
+ /* Bytes of protection data to copy into sgl */
+ resid = sectors * sizeof(*dif_storep);
+
+ sg_miter_start(&miter, scsi_prot_sglist(SCpnt),
+ scsi_prot_sg_count(SCpnt), SG_MITER_ATOMIC |
+ (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
+
+ while (sg_miter_next(&miter) && resid > 0) {
+ size_t len = min(miter.length, resid);
+ void *start = dif_store(sector);
+ size_t rest = 0;
+
+ if (dif_store_end < start + len)
+ rest = start + len - dif_store_end;
+
+ paddr = miter.addr;
+
+ if (read)
+ memcpy(paddr, start, len - rest);
+ else
+ memcpy(start, paddr, len - rest);
+
+ if (rest) {
+ if (read)
+ memcpy(paddr + len - rest, dif_storep, rest);
+ else
+ memcpy(dif_storep, paddr + len - rest, rest);
+ }
+
+ sector += len / sizeof(*dif_storep);
+ resid -= len;
+ }
+ sg_miter_stop(&miter);
+}
+
+static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
+ unsigned int sectors, u32 ei_lba)
+{
+ unsigned int i;
+ struct sd_dif_tuple *sdt;
+ sector_t sector;
+
+ for (i = 0; i < sectors; i++, ei_lba++) {
+ int ret;
+
+ sector = start_sec + i;
+ sdt = dif_store(sector);
+
+ if (sdt->app_tag == cpu_to_be16(0xffff))
+ continue;
+
+ ret = dif_verify(sdt, fake_store(sector), sector, ei_lba);
+ if (ret) {
+ dif_errors++;
+ return ret;
+ }
+ }
+
+ dif_copy_prot(SCpnt, start_sec, sectors, true);
+ dix_reads++;
+
+ return 0;
+}
+
+static int
+resp_read_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 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 (check_prot) {
+ if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
+ (cmd[1] & 0xe0)) {
+ mk_sense_invalid_opcode(scp);
+ return check_condition_result;
+ }
+ if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
+ scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
+ (cmd[1] & 0xe0) == 0)
+ sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
+ "to DIF device\n");
+ }
+ if (sdebug_any_injecting_opt) {
+ struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
+
+ if (ep->inj_short)
+ num /= 2;
+ }
+
+ /* 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;
+ }
+
+ if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
+ (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) &&
+ ((lba + num) > OPT_MEDIUM_ERR_ADDR)) {
+ /* claim unrecoverable read error */
+ mk_sense_buffer(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 (scsi_debug_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, lba, num, false);
+ read_unlock_irqrestore(&atomic_rw, iflags);
+ if (ret == -1)
+ return DID_ERROR << 16;
+
+ scsi_in(scp)->resid = scsi_bufflen(scp) - ret;
+
+ if (sdebug_any_injecting_opt) {
+ struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
+
+ if (ep->inj_recovered) {
+ mk_sense_buffer(scp, RECOVERED_ERROR,
+ THRESHOLD_EXCEEDED, 0);
+ return check_condition_result;
+ } else if (ep->inj_transport) {
+ mk_sense_buffer(scp, ABORTED_COMMAND,
+ TRANSPORT_PROBLEM, ACK_NAK_TO);
+ return check_condition_result;
+ } else if (ep->inj_dif) {
+ /* Logical block guard check failed */
+ mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
+ return illegal_condition_result;
+ } else if (ep->inj_dix) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
+ return illegal_condition_result;
+ }
+ }
+ return 0;
+}
+
+void dump_sector(unsigned char *buf, int len)
+{
+ int i, j, n;
+
+ pr_err(">>> Sector Dump <<<\n");
+ for (i = 0 ; i < len ; i += 16) {
+ char b[128];
+
+ for (j = 0, n = 0; j < 16; j++) {
+ unsigned char c = buf[i+j];
+
+ if (c >= 0x20 && c < 0x7e)
+ n += scnprintf(b + n, sizeof(b) - n,
+ " %c ", buf[i+j]);
+ else
+ n += scnprintf(b + n, sizeof(b) - n,
+ "%02x ", buf[i+j]);
+ }
+ pr_err("%04d: %s\n", i, b);
+ }
+}
+
+static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
+ unsigned int sectors, u32 ei_lba)
+{
+ int ret;
+ struct sd_dif_tuple *sdt;
+ void *daddr;
+ sector_t sector = start_sec;
+ int ppage_offset;
+ int dpage_offset;
+ struct sg_mapping_iter diter;
+ struct sg_mapping_iter piter;
+
+ BUG_ON(scsi_sg_count(SCpnt) == 0);
+ BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
+
+ sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
+ scsi_prot_sg_count(SCpnt),
+ SG_MITER_ATOMIC | SG_MITER_FROM_SG);
+ sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
+ SG_MITER_ATOMIC | SG_MITER_FROM_SG);
+
+ /* For each protection page */
+ while (sg_miter_next(&piter)) {
+ dpage_offset = 0;
+ if (WARN_ON(!sg_miter_next(&diter))) {
+ ret = 0x01;
+ goto out;
+ }
+
+ for (ppage_offset = 0; ppage_offset < piter.length;
+ ppage_offset += sizeof(struct sd_dif_tuple)) {
+ /* If we're at the end of the current
+ * data page advance to the next one
+ */
+ if (dpage_offset >= diter.length) {
+ if (WARN_ON(!sg_miter_next(&diter))) {
+ ret = 0x01;
+ goto out;
+ }
+ dpage_offset = 0;
+ }
+
+ sdt = piter.addr + ppage_offset;
+ daddr = diter.addr + dpage_offset;
+
+ ret = dif_verify(sdt, daddr, sector, ei_lba);
+ if (ret) {
+ dump_sector(daddr, scsi_debug_sector_size);
+ goto out;
+ }
+
+ sector++;
+ ei_lba++;
+ dpage_offset += scsi_debug_sector_size;
+ }
+ diter.consumed = dpage_offset;
+ sg_miter_stop(&diter);
+ }
+ sg_miter_stop(&piter);
+
+ dif_copy_prot(SCpnt, start_sec, sectors, false);
+ dix_writes++;
+
+ return 0;
+
+out:
+ dif_errors++;
+ sg_miter_stop(&diter);
+ sg_miter_stop(&piter);
+ return ret;
+}
+
+static unsigned long lba_to_map_index(sector_t lba)
+{
+ if (scsi_debug_unmap_alignment) {
+ lba += scsi_debug_unmap_granularity -
+ scsi_debug_unmap_alignment;
+ }
+ do_div(lba, scsi_debug_unmap_granularity);
+
+ return lba;
+}
+
+static sector_t map_index_to_lba(unsigned long index)
+{
+ sector_t lba = index * scsi_debug_unmap_granularity;
+
+ if (scsi_debug_unmap_alignment) {
+ lba -= scsi_debug_unmap_granularity -
+ scsi_debug_unmap_alignment;
+ }
+
+ return lba;
+}
+
+static unsigned int map_state(sector_t lba, unsigned int *num)
+{
+ sector_t end;
+ unsigned int mapped;
+ unsigned long index;
+ unsigned long next;
+
+ index = lba_to_map_index(lba);
+ mapped = test_bit(index, map_storep);
+
+ if (mapped)
+ next = find_next_zero_bit(map_storep, map_size, index);
+ else
+ next = find_next_bit(map_storep, map_size, index);
+
+ end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
+ *num = end - lba;
+
+ return mapped;
+}
+
+static void map_region(sector_t lba, unsigned int len)
+{
+ sector_t end = lba + len;
+
+ while (lba < end) {
+ unsigned long index = lba_to_map_index(lba);
+
+ if (index < map_size)
+ set_bit(index, map_storep);
+
+ lba = map_index_to_lba(index + 1);
+ }
+}
+
+static void unmap_region(sector_t lba, unsigned int len)
+{
+ sector_t end = lba + len;
+
+ while (lba < end) {
+ unsigned long index = lba_to_map_index(lba);
+
+ if (lba == map_index_to_lba(index) &&
+ lba + scsi_debug_unmap_granularity <= end &&
+ index < map_size) {
+ clear_bit(index, map_storep);
+ if (scsi_debug_lbprz) {
+ memset(fake_storep +
+ lba * scsi_debug_sector_size, 0,
+ scsi_debug_sector_size *
+ scsi_debug_unmap_granularity);
+ }
+ if (dif_storep) {
+ memset(dif_storep + lba, 0xff,
+ sizeof(*dif_storep) *
+ scsi_debug_unmap_granularity);
+ }
+ }
+ lba = map_index_to_lba(index + 1);
+ }
+}
+
+static int
+resp_write_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 (check_prot) {
+ if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
+ (cmd[1] & 0xe0)) {
+ mk_sense_invalid_opcode(scp);
+ return check_condition_result;
+ }
+ if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
+ scsi_debug_dif == SD_DIF_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;
+ }
+
+ write_lock_irqsave(&atomic_rw, iflags);
+
+ /* DIX + T10 DIF */
+ if (scsi_debug_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, lba, num, true);
+ if (scsi_debug_lbp())
+ map_region(lba, num);
+ write_unlock_irqrestore(&atomic_rw, iflags);
+ if (-1 == ret)
+ return (DID_ERROR << 16);
+ else if ((ret < (num * scsi_debug_sector_size)) &&
+ (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
+ sdev_printk(KERN_INFO, scp->device,
+ "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
+ my_name, num * scsi_debug_sector_size, ret);
+
+ if (sdebug_any_injecting_opt) {
+ struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
+
+ if (ep->inj_recovered) {
+ mk_sense_buffer(scp, RECOVERED_ERROR,
+ THRESHOLD_EXCEEDED, 0);
+ return check_condition_result;
+ } else if (ep->inj_dif) {
+ /* Logical block guard check failed */
+ mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
+ return illegal_condition_result;
+ } else if (ep->inj_dix) {
+ mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
+ return illegal_condition_result;
+ }
+ }
+ return 0;
+}
+
+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;
+
+ 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;
+ }
+
+ /* if ndob then zero 1 logical block, else fetch 1 logical block */
+ if (ndob) {
+ memset(fake_storep + (lba * scsi_debug_sector_size), 0,
+ scsi_debug_sector_size);
+ ret = 0;
+ } else
+ ret = fetch_to_dev_buffer(scp, fake_storep +
+ (lba * scsi_debug_sector_size),
+ scsi_debug_sector_size);
+
+ if (-1 == ret) {
+ write_unlock_irqrestore(&atomic_rw, iflags);
+ return (DID_ERROR << 16);
+ } else if ((ret < (num * scsi_debug_sector_size)) &&
+ (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
+ sdev_printk(KERN_INFO, scp->device,
+ "%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
+ my_name, "write same",
+ num * scsi_debug_sector_size, ret);
+
+ /* Copy first sector to remaining blocks */
+ for (i = 1 ; i < num ; i++)
+ memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size),
+ fake_storep + (lba * scsi_debug_sector_size),
+ scsi_debug_sector_size);
+
+ if (scsi_debug_lbp())
+ map_region(lba, num);
+out:
+ write_unlock_irqrestore(&atomic_rw, iflags);
+
+ return 0;
+}
+
+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 (scsi_debug_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 > scsi_debug_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 (scsi_debug_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 > scsi_debug_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 = scsi_debug_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 (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
+ (cmd[1] & 0xe0)) {
+ mk_sense_invalid_opcode(scp);
+ return check_condition_result;
+ }
+ if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
+ scsi_debug_dif == SD_DIF_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, dnum, true);
+ fake_storep = fake_storep_hold;
+ if (ret == -1) {
+ retval = DID_ERROR << 16;
+ goto cleanup;
+ } else if ((ret < (dnum * lb_size)) &&
+ (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
+ 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 > scsi_debug_unmap_max_desc) {
+ mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
+ return check_condition_result;
+ }
+
+ buf = kmalloc(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);
+}
+
+#define SDEBUG_RLUN_ARR_SZ 256
+
+static int resp_report_luns(struct scsi_cmnd * scp,
+ struct sdebug_dev_info * devip)
+{
+ unsigned int alloc_len;
+ int lun_cnt, i, upper, num, n, want_wlun, shortish;
+ u64 lun;
+ unsigned char *cmd = scp->cmnd;
+ int select_report = (int)cmd[2];
+ struct scsi_lun *one_lun;
+ unsigned char arr[SDEBUG_RLUN_ARR_SZ];
+ unsigned char * max_addr;
+
+ clear_luns_changed_on_target(devip);
+ alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
+ shortish = (alloc_len < 4);
+ if (shortish || (select_report > 2)) {
+ mk_sense_invalid_fld(scp, SDEB_IN_CDB, shortish ? 6 : 2, -1);
+ return check_condition_result;
+ }
+ /* can produce response with up to 16k luns (lun 0 to lun 16383) */
+ memset(arr, 0, SDEBUG_RLUN_ARR_SZ);
+ lun_cnt = scsi_debug_max_luns;
+ if (1 == select_report)
+ lun_cnt = 0;
+ else if (scsi_debug_no_lun_0 && (lun_cnt > 0))
+ --lun_cnt;
+ want_wlun = (select_report > 0) ? 1 : 0;
+ num = lun_cnt + want_wlun;
+ arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff;
+ arr[3] = (sizeof(struct scsi_lun) * num) & 0xff;
+ n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
+ sizeof(struct scsi_lun)), num);
+ if (n < num) {
+ want_wlun = 0;
+ lun_cnt = n;
+ }
+ one_lun = (struct scsi_lun *) &arr[8];
+ max_addr = arr + SDEBUG_RLUN_ARR_SZ;
+ for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0);
+ ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr));
+ i++, lun++) {
+ upper = (lun >> 8) & 0x3f;
+ if (upper)
+ one_lun[i].scsi_lun[0] =
+ (upper | (SAM2_LUN_ADDRESS_METHOD << 6));
+ one_lun[i].scsi_lun[1] = lun & 0xff;
+ }
+ if (want_wlun) {
+ one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff;
+ one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff;
+ i++;
+ }
+ alloc_len = (unsigned char *)(one_lun + i) - arr;
+ return fill_from_dev_buffer(scp, arr,
+ min((int)alloc_len, SDEBUG_RLUN_ARR_SZ));
+}
+
+static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
+ unsigned int num, struct sdebug_dev_info *devip)
+{
+ int j;
+ unsigned char *kaddr, *buf;
+ unsigned int offset;
+ struct scsi_data_buffer *sdb = scsi_in(scp);
+ struct sg_mapping_iter miter;
+
+ /* better not to use temporary buffer. */
+ buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
+ if (!buf) {
+ mk_sense_buffer(scp, 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);
+}
+
+/* When timer or tasklet goes off this function is called. */
+static void sdebug_q_cmd_complete(unsigned long indx)
+{
+ int qa_indx;
+ int retiring = 0;
+ unsigned long iflags;
+ struct sdebug_queued_cmd *sqcp;
+ struct scsi_cmnd *scp;
+ struct sdebug_dev_info *devip;
+
+ atomic_inc(&sdebug_completions);
+ qa_indx = indx;
+ if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) {
+ pr_err("%s: wild qa_indx=%d\n", __func__, qa_indx);
+ return;
+ }
+ spin_lock_irqsave(&queued_arr_lock, iflags);
+ sqcp = &queued_arr[qa_indx];
+ scp = sqcp->a_cmnd;
+ if (NULL == scp) {
+ spin_unlock_irqrestore(&queued_arr_lock, iflags);
+ pr_err("%s: scp is NULL\n", __func__);
+ return;
+ }
+ devip = (struct sdebug_dev_info *)scp->device->hostdata;
+ if (devip)
+ atomic_dec(&devip->num_in_q);
+ else
+ pr_err("%s: devip=NULL\n", __func__);
+ if (atomic_read(&retired_max_queue) > 0)
+ retiring = 1;
+
+ sqcp->a_cmnd = NULL;
+ if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) {
+ spin_unlock_irqrestore(&queued_arr_lock, iflags);
+ pr_err("%s: Unexpected completion\n", __func__);
+ return;
+ }
+
+ if (unlikely(retiring)) { /* user has reduced max_queue */
+ int k, retval;
+
+ retval = atomic_read(&retired_max_queue);
+ if (qa_indx >= retval) {
+ spin_unlock_irqrestore(&queued_arr_lock, iflags);
+ pr_err("%s: index %d too large\n", __func__, retval);
+ return;
+ }
+ k = find_last_bit(queued_in_use_bm, retval);
+ if ((k < scsi_debug_max_queue) || (k == retval))
+ atomic_set(&retired_max_queue, 0);
+ else
+ atomic_set(&retired_max_queue, k + 1);
+ }
+ spin_unlock_irqrestore(&queued_arr_lock, iflags);
+ scp->scsi_done(scp); /* callback to mid level */
+}
+
+/* When high resolution timer goes off this function is called. */
+static enum hrtimer_restart
+sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
+{
+ int qa_indx;
+ int retiring = 0;
+ unsigned long iflags;
+ struct sdebug_hrtimer *sd_hrtp = (struct sdebug_hrtimer *)timer;
+ struct sdebug_queued_cmd *sqcp;
+ struct scsi_cmnd *scp;
+ struct sdebug_dev_info *devip;
+
+ atomic_inc(&sdebug_completions);
+ qa_indx = sd_hrtp->qa_indx;
+ if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) {
+ pr_err("%s: wild qa_indx=%d\n", __func__, qa_indx);
+ goto the_end;
+ }
+ spin_lock_irqsave(&queued_arr_lock, iflags);
+ sqcp = &queued_arr[qa_indx];
+ scp = sqcp->a_cmnd;
+ if (NULL == scp) {
+ spin_unlock_irqrestore(&queued_arr_lock, iflags);
+ pr_err("%s: scp is NULL\n", __func__);
+ goto the_end;
+ }
+ devip = (struct sdebug_dev_info *)scp->device->hostdata;
+ if (devip)
+ atomic_dec(&devip->num_in_q);
+ else
+ pr_err("%s: devip=NULL\n", __func__);
+ if (atomic_read(&retired_max_queue) > 0)
+ retiring = 1;
+
+ sqcp->a_cmnd = NULL;
+ if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) {
+ spin_unlock_irqrestore(&queued_arr_lock, iflags);
+ pr_err("%s: Unexpected completion\n", __func__);
+ goto the_end;
+ }
+
+ if (unlikely(retiring)) { /* user has reduced max_queue */
+ int k, retval;
+
+ retval = atomic_read(&retired_max_queue);
+ if (qa_indx >= retval) {
+ spin_unlock_irqrestore(&queued_arr_lock, iflags);
+ pr_err("%s: index %d too large\n", __func__, retval);
+ goto the_end;
+ }
+ k = find_last_bit(queued_in_use_bm, retval);
+ if ((k < scsi_debug_max_queue) || (k == retval))
+ atomic_set(&retired_max_queue, 0);
+ else
+ atomic_set(&retired_max_queue, k + 1);
+ }
+ spin_unlock_irqrestore(&queued_arr_lock, iflags);
+ scp->scsi_done(scp); /* callback to mid level */
+the_end:
+ return HRTIMER_NORESTART;
+}
+
+static struct sdebug_dev_info *
+sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags)
+{
+ struct sdebug_dev_info *devip;
+
+ devip = kzalloc(sizeof(*devip), flags);
+ if (devip) {
+ devip->sdbg_host = sdbg_host;
+ list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
+ }
+ return devip;
+}
+
+static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev)
+{
+ struct sdebug_host_info * sdbg_host;
+ struct sdebug_dev_info * open_devip = NULL;
+ struct sdebug_dev_info * devip =
+ (struct sdebug_dev_info *)sdev->hostdata;
+
+ if (devip)
+ return devip;
+ sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
+ if (!sdbg_host) {
+ pr_err("%s: Host info NULL\n", __func__);
+ return NULL;
+ }
+ list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
+ if ((devip->used) && (devip->channel == sdev->channel) &&
+ (devip->target == sdev->id) &&
+ (devip->lun == sdev->lun))
+ return devip;
+ else {
+ if ((!devip->used) && (!open_devip))
+ open_devip = devip;
+ }
+ }
+ if (!open_devip) { /* try and make a new one */
+ open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
+ if (!open_devip) {
+ printk(KERN_ERR "%s: out of memory at line %d\n",
+ __func__, __LINE__);
+ return NULL;
+ }
+ }
+
+ open_devip->channel = sdev->channel;
+ open_devip->target = sdev->id;
+ open_devip->lun = sdev->lun;
+ open_devip->sdbg_host = sdbg_host;
+ atomic_set(&open_devip->num_in_q, 0);
+ set_bit(SDEBUG_UA_POR, open_devip->uas_bm);
+ open_devip->used = true;
+ return open_devip;
+}
+
+static int scsi_debug_slave_alloc(struct scsi_device *sdp)
+{
+ if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
+ printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %llu>\n",
+ sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
+ queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
+ return 0;
+}
+
+static int scsi_debug_slave_configure(struct scsi_device *sdp)
+{
+ struct sdebug_dev_info *devip;
+
+ if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
+ printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %llu>\n",
+ sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
+ if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN)
+ sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN;
+ devip = devInfoReg(sdp);
+ if (NULL == devip)
+ return 1; /* no resources, will be marked offline */
+ sdp->hostdata = devip;
+ blk_queue_max_segment_size(sdp->request_queue, -1U);
+ if (scsi_debug_no_uld)
+ sdp->no_uld_attach = 1;
+ return 0;
+}
+
+static void scsi_debug_slave_destroy(struct scsi_device *sdp)
+{
+ struct sdebug_dev_info *devip =
+ (struct sdebug_dev_info *)sdp->hostdata;
+
+ if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
+ printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %llu>\n",
+ sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
+ if (devip) {
+ /* make this slot available for re-use */
+ devip->used = false;
+ sdp->hostdata = NULL;
+ }
+}
+
+/* Returns 1 if cmnd found (deletes its timer or tasklet), else returns 0 */
+static int stop_queued_cmnd(struct scsi_cmnd *cmnd)
+{
+ unsigned long iflags;
+ int k, qmax, r_qmax;
+ struct sdebug_queued_cmd *sqcp;
+ struct sdebug_dev_info *devip;
+
+ spin_lock_irqsave(&queued_arr_lock, iflags);
+ qmax = scsi_debug_max_queue;
+ r_qmax = atomic_read(&retired_max_queue);
+ if (r_qmax > qmax)
+ qmax = r_qmax;
+ for (k = 0; k < qmax; ++k) {
+ if (test_bit(k, queued_in_use_bm)) {
+ sqcp = &queued_arr[k];
+ if (cmnd == sqcp->a_cmnd) {
+ devip = (struct sdebug_dev_info *)
+ cmnd->device->hostdata;
+ if (devip)
+ atomic_dec(&devip->num_in_q);
+ sqcp->a_cmnd = NULL;
+ spin_unlock_irqrestore(&queued_arr_lock,
+ iflags);
+ if (scsi_debug_ndelay > 0) {
+ if (sqcp->sd_hrtp)
+ hrtimer_cancel(
+ &sqcp->sd_hrtp->hrt);
+ } else if (scsi_debug_delay > 0) {
+ if (sqcp->cmnd_timerp)
+ del_timer_sync(
+ sqcp->cmnd_timerp);
+ } else if (scsi_debug_delay < 0) {
+ if (sqcp->tletp)
+ tasklet_kill(sqcp->tletp);
+ }
+ clear_bit(k, queued_in_use_bm);
+ return 1;
+ }
+ }
+ }
+ spin_unlock_irqrestore(&queued_arr_lock, iflags);
+ return 0;
+}
+
+/* Deletes (stops) timers or tasklets of all queued commands */
+static void stop_all_queued(void)
+{
+ unsigned long iflags;
+ int k;
+ struct sdebug_queued_cmd *sqcp;
+ struct sdebug_dev_info *devip;
+
+ spin_lock_irqsave(&queued_arr_lock, iflags);
+ for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
+ if (test_bit(k, queued_in_use_bm)) {
+ sqcp = &queued_arr[k];
+ if (sqcp->a_cmnd) {
+ devip = (struct sdebug_dev_info *)
+ sqcp->a_cmnd->device->hostdata;
+ if (devip)
+ atomic_dec(&devip->num_in_q);
+ sqcp->a_cmnd = NULL;
+ spin_unlock_irqrestore(&queued_arr_lock,
+ iflags);
+ if (scsi_debug_ndelay > 0) {
+ if (sqcp->sd_hrtp)
+ hrtimer_cancel(
+ &sqcp->sd_hrtp->hrt);
+ } else if (scsi_debug_delay > 0) {
+ if (sqcp->cmnd_timerp)
+ del_timer_sync(
+ sqcp->cmnd_timerp);
+ } else if (scsi_debug_delay < 0) {
+ if (sqcp->tletp)
+ tasklet_kill(sqcp->tletp);
+ }
+ clear_bit(k, queued_in_use_bm);
+ spin_lock_irqsave(&queued_arr_lock, iflags);
+ }
+ }
+ }
+ spin_unlock_irqrestore(&queued_arr_lock, iflags);
+}
+
+/* Free queued command memory on heap */
+static void free_all_queued(void)
+{
+ unsigned long iflags;
+ int k;
+ struct sdebug_queued_cmd *sqcp;
+
+ spin_lock_irqsave(&queued_arr_lock, iflags);
+ for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
+ sqcp = &queued_arr[k];
+ kfree(sqcp->cmnd_timerp);
+ sqcp->cmnd_timerp = NULL;
+ kfree(sqcp->tletp);
+ sqcp->tletp = NULL;
+ kfree(sqcp->sd_hrtp);
+ sqcp->sd_hrtp = NULL;
+ }
+ spin_unlock_irqrestore(&queued_arr_lock, iflags);
+}
+
+static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
+{
+ ++num_aborts;
+ if (SCpnt) {
+ if (SCpnt->device &&
+ (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts))
+ sdev_printk(KERN_INFO, SCpnt->device, "%s\n",
+ __func__);
+ stop_queued_cmnd(SCpnt);
+ }
+ return SUCCESS;
+}
+
+static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
+{
+ struct sdebug_dev_info * devip;
+
+ ++num_dev_resets;
+ if (SCpnt && SCpnt->device) {
+ struct scsi_device *sdp = SCpnt->device;
+
+ if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
+ sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
+ devip = devInfoReg(sdp);
+ if (devip)
+ set_bit(SDEBUG_UA_POR, devip->uas_bm);
+ }
+ return SUCCESS;
+}
+
+static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
+{
+ struct sdebug_host_info *sdbg_host;
+ struct sdebug_dev_info *devip;
+ struct scsi_device *sdp;
+ struct Scsi_Host *hp;
+ int k = 0;
+
+ ++num_target_resets;
+ if (!SCpnt)
+ goto lie;
+ sdp = SCpnt->device;
+ if (!sdp)
+ goto lie;
+ if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
+ sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
+ hp = sdp->host;
+ if (!hp)
+ goto lie;
+ sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
+ if (sdbg_host) {
+ list_for_each_entry(devip,
+ &sdbg_host->dev_info_list,
+ dev_list)
+ if (devip->target == sdp->id) {
+ set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
+ ++k;
+ }
+ }
+ if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
+ sdev_printk(KERN_INFO, sdp,
+ "%s: %d device(s) found in target\n", __func__, k);
+lie:
+ return SUCCESS;
+}
+
+static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
+{
+ struct sdebug_host_info *sdbg_host;
+ struct sdebug_dev_info *devip;
+ struct scsi_device * sdp;
+ struct Scsi_Host * hp;
+ int k = 0;
+
+ ++num_bus_resets;
+ if (!(SCpnt && SCpnt->device))
+ goto lie;
+ sdp = SCpnt->device;
+ if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
+ sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
+ hp = sdp->host;
+ if (hp) {
+ sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
+ if (sdbg_host) {
+ list_for_each_entry(devip,
+ &sdbg_host->dev_info_list,
+ dev_list) {
+ set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
+ ++k;
+ }
+ }
+ }
+ if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
+ sdev_printk(KERN_INFO, sdp,
+ "%s: %d device(s) found in host\n", __func__, k);
+lie:
+ return SUCCESS;
+}
+
+static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
+{
+ struct sdebug_host_info * sdbg_host;
+ struct sdebug_dev_info *devip;
+ int k = 0;
+
+ ++num_host_resets;
+ if ((SCpnt->device) && (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts))
+ sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
+ spin_lock(&sdebug_host_list_lock);
+ list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
+ list_for_each_entry(devip, &sdbg_host->dev_info_list,
+ dev_list) {
+ set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
+ ++k;
+ }
+ }
+ spin_unlock(&sdebug_host_list_lock);
+ stop_all_queued();
+ if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
+ sdev_printk(KERN_INFO, SCpnt->device,
+ "%s: %d device(s) found\n", __func__, k);
+ return SUCCESS;
+}
+
+static void __init sdebug_build_parts(unsigned char *ramp,
+ unsigned long store_size)
+{
+ struct partition * pp;
+ int starts[SDEBUG_MAX_PARTS + 2];
+ int sectors_per_part, num_sectors, k;
+ int heads_by_sects, start_sec, end_sec;
+
+ /* assume partition table already zeroed */
+ if ((scsi_debug_num_parts < 1) || (store_size < 1048576))
+ return;
+ if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) {
+ scsi_debug_num_parts = SDEBUG_MAX_PARTS;
+ pr_warn("%s: reducing partitions to %d\n", __func__,
+ SDEBUG_MAX_PARTS);
+ }
+ num_sectors = (int)sdebug_store_sectors;
+ sectors_per_part = (num_sectors - sdebug_sectors_per)
+ / scsi_debug_num_parts;
+ heads_by_sects = sdebug_heads * sdebug_sectors_per;
+ starts[0] = sdebug_sectors_per;
+ for (k = 1; k < scsi_debug_num_parts; ++k)
+ starts[k] = ((k * sectors_per_part) / heads_by_sects)
+ * heads_by_sects;
+ starts[scsi_debug_num_parts] = num_sectors;
+ starts[scsi_debug_num_parts + 1] = 0;
+
+ ramp[510] = 0x55; /* magic partition markings */
+ ramp[511] = 0xAA;
+ pp = (struct partition *)(ramp + 0x1be);
+ for (k = 0; starts[k + 1]; ++k, ++pp) {
+ start_sec = starts[k];
+ end_sec = starts[k + 1] - 1;
+ pp->boot_ind = 0;
+
+ pp->cyl = start_sec / heads_by_sects;
+ pp->head = (start_sec - (pp->cyl * heads_by_sects))
+ / sdebug_sectors_per;
+ pp->sector = (start_sec % sdebug_sectors_per) + 1;
+
+ pp->end_cyl = end_sec / heads_by_sects;
+ pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
+ / sdebug_sectors_per;
+ pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
+
+ pp->start_sect = cpu_to_le32(start_sec);
+ pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
+ pp->sys_ind = 0x83; /* plain Linux partition */
+ }
+}
+
+static int
+schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
+ int scsi_result, int delta_jiff)
+{
+ unsigned long iflags;
+ int k, num_in_q, qdepth, inject;
+ struct sdebug_queued_cmd *sqcp = NULL;
+ struct scsi_device *sdp = cmnd->device;
+
+ if (NULL == cmnd || NULL == devip) {
+ pr_warn("%s: called with NULL cmnd or devip pointer\n",
+ __func__);
+ /* no particularly good error to report back */
+ return SCSI_MLQUEUE_HOST_BUSY;
+ }
+ if ((scsi_result) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
+ sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
+ __func__, scsi_result);
+ if (delta_jiff == 0)
+ goto respond_in_thread;
+
+ /* schedule the response at a later time if resources permit */
+ spin_lock_irqsave(&queued_arr_lock, iflags);
+ num_in_q = atomic_read(&devip->num_in_q);
+ qdepth = cmnd->device->queue_depth;
+ inject = 0;
+ if ((qdepth > 0) && (num_in_q >= qdepth)) {
+ if (scsi_result) {
+ spin_unlock_irqrestore(&queued_arr_lock, iflags);
+ goto respond_in_thread;
+ } else
+ scsi_result = device_qfull_result;
+ } else if ((scsi_debug_every_nth != 0) &&
+ (SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) &&
+ (scsi_result == 0)) {
+ if ((num_in_q == (qdepth - 1)) &&
+ (atomic_inc_return(&sdebug_a_tsf) >=
+ abs(scsi_debug_every_nth))) {
+ atomic_set(&sdebug_a_tsf, 0);
+ inject = 1;
+ scsi_result = device_qfull_result;
+ }
+ }
+
+ k = find_first_zero_bit(queued_in_use_bm, scsi_debug_max_queue);
+ if (k >= scsi_debug_max_queue) {
+ spin_unlock_irqrestore(&queued_arr_lock, iflags);
+ if (scsi_result)
+ goto respond_in_thread;
+ else if (SCSI_DEBUG_OPT_ALL_TSF & scsi_debug_opts)
+ scsi_result = device_qfull_result;
+ if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts)
+ sdev_printk(KERN_INFO, sdp,
+ "%s: max_queue=%d exceeded, %s\n",
+ __func__, scsi_debug_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, queued_in_use_bm);
+ atomic_inc(&devip->num_in_q);
+ sqcp = &queued_arr[k];
+ sqcp->a_cmnd = cmnd;
+ cmnd->result = scsi_result;
+ spin_unlock_irqrestore(&queued_arr_lock, iflags);
+ if (delta_jiff > 0) {
+ if (NULL == sqcp->cmnd_timerp) {
+ sqcp->cmnd_timerp = kmalloc(sizeof(struct timer_list),
+ GFP_ATOMIC);
+ if (NULL == sqcp->cmnd_timerp)
+ return SCSI_MLQUEUE_HOST_BUSY;
+ init_timer(sqcp->cmnd_timerp);
+ }
+ sqcp->cmnd_timerp->function = sdebug_q_cmd_complete;
+ sqcp->cmnd_timerp->data = k;
+ sqcp->cmnd_timerp->expires = get_jiffies_64() + delta_jiff;
+ add_timer(sqcp->cmnd_timerp);
+ } else if (scsi_debug_ndelay > 0) {
+ ktime_t kt = ktime_set(0, scsi_debug_ndelay);
+ struct sdebug_hrtimer *sd_hp = sqcp->sd_hrtp;
+
+ if (NULL == sd_hp) {
+ sd_hp = kmalloc(sizeof(*sd_hp), GFP_ATOMIC);
+ if (NULL == sd_hp)
+ return SCSI_MLQUEUE_HOST_BUSY;
+ sqcp->sd_hrtp = sd_hp;
+ hrtimer_init(&sd_hp->hrt, CLOCK_MONOTONIC,
+ HRTIMER_MODE_REL);
+ sd_hp->hrt.function = sdebug_q_cmd_hrt_complete;
+ sd_hp->qa_indx = k;
+ }
+ hrtimer_start(&sd_hp->hrt, kt, HRTIMER_MODE_REL);
+ } else { /* delay < 0 */
+ if (NULL == sqcp->tletp) {
+ sqcp->tletp = kmalloc(sizeof(*sqcp->tletp),
+ GFP_ATOMIC);
+ if (NULL == sqcp->tletp)
+ return SCSI_MLQUEUE_HOST_BUSY;
+ tasklet_init(sqcp->tletp,
+ sdebug_q_cmd_complete, k);
+ }
+ if (-1 == delta_jiff)
+ tasklet_hi_schedule(sqcp->tletp);
+ else
+ tasklet_schedule(sqcp->tletp);
+ }
+ if ((SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_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 = 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, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
+module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
+module_param_named(clustering, scsi_debug_clustering, bool, S_IRUGO | S_IWUSR);
+module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
+module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
+module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
+module_param_named(dix, scsi_debug_dix, int, S_IRUGO);
+module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR);
+module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR);
+module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR);
+module_param_named(guard, scsi_debug_guard, uint, S_IRUGO);
+module_param_named(host_lock, scsi_debug_host_lock, bool, S_IRUGO | S_IWUSR);
+module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO);
+module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO);
+module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO);
+module_param_named(lbprz, scsi_debug_lbprz, int, S_IRUGO);
+module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO);
+module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
+module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR);
+module_param_named(ndelay, scsi_debug_ndelay, int, S_IRUGO | S_IWUSR);
+module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
+module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO);
+module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO);
+module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR);
+module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO);
+module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
+module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO);
+module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
+module_param_named(removable, scsi_debug_removable, bool, S_IRUGO | S_IWUSR);
+module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
+module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO);
+module_param_named(strict, scsi_debug_strict, bool, S_IRUGO | S_IWUSR);
+module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO);
+module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO);
+module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO);
+module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO);
+module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
+module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
+ S_IRUGO | S_IWUSR);
+module_param_named(write_same_length, scsi_debug_write_same_length, int,
+ S_IRUGO | S_IWUSR);
+
+MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
+MODULE_DESCRIPTION("SCSI debug adapter driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(SCSI_DEBUG_VERSION);
+
+MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
+MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
+MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
+MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
+MODULE_PARM_DESC(dev_size_mb, "size in 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, "use host_lock around all commands (def=0)");
+MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
+MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
+MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
+MODULE_PARM_DESC(lbprz, "unmapped blocks return 0 on read (def=1)");
+MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
+MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
+MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
+MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
+MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
+MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
+MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
+MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
+MODULE_PARM_DESC(opt_blks, "optimal transfer length in block (def=64)");
+MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
+MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
+MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
+MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
+MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=6[SPC-4])");
+MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
+MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
+MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
+MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
+MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
+MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
+MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (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)");
+
+static char sdebug_info[256];
+
+static const char * scsi_debug_info(struct Scsi_Host * shp)
+{
+ sprintf(sdebug_info, "scsi_debug, version %s [%s], "
+ "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION,
+ scsi_debug_version_date, scsi_debug_dev_size_mb,
+ scsi_debug_opts);
+ return sdebug_info;
+}
+
+/* 'echo <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;
+ scsi_debug_opts = opts;
+ if (scsi_debug_every_nth != 0)
+ atomic_set(&sdebug_cmnd_count, 0);
+ return length;
+}
+
+/* Output seen with 'cat /proc/scsi/scsi_debug/<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, l;
+ char b[32];
+
+ if (scsi_debug_every_nth > 0)
+ snprintf(b, sizeof(b), " (curr:%d)",
+ ((SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) ?
+ atomic_read(&sdebug_a_tsf) :
+ atomic_read(&sdebug_cmnd_count)));
+ else
+ b[0] = '\0';
+
+ seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n"
+ "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
+ "every_nth=%d%s\n"
+ "delay=%d, ndelay=%d, max_luns=%d, q_completions=%d\n"
+ "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
+ "command aborts=%d; RESETs: device=%d, target=%d, bus=%d, "
+ "host=%d\ndix_reads=%d dix_writes=%d dif_errors=%d "
+ "usec_in_jiffy=%lu\n",
+ SCSI_DEBUG_VERSION, scsi_debug_version_date,
+ scsi_debug_num_tgts, scsi_debug_dev_size_mb, scsi_debug_opts,
+ scsi_debug_every_nth, b, scsi_debug_delay, scsi_debug_ndelay,
+ scsi_debug_max_luns, atomic_read(&sdebug_completions),
+ scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads,
+ sdebug_sectors_per, num_aborts, num_dev_resets,
+ num_target_resets, num_bus_resets, num_host_resets,
+ dix_reads, dix_writes, dif_errors, TICK_NSEC / 1000);
+
+ f = find_first_bit(queued_in_use_bm, scsi_debug_max_queue);
+ if (f != scsi_debug_max_queue) {
+ l = find_last_bit(queued_in_use_bm, scsi_debug_max_queue);
+ seq_printf(m, " %s BUSY: first,last bits set: %d,%d\n",
+ "queued_in_use_bm", f, l);
+ }
+ return 0;
+}
+
+static ssize_t delay_show(struct device_driver *ddp, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
+}
+/* Returns -EBUSY if delay is being changed and commands are queued */
+static ssize_t delay_store(struct device_driver *ddp, const char *buf,
+ size_t count)
+{
+ int delay, res;
+
+ if ((count > 0) && (1 == sscanf(buf, "%d", &delay))) {
+ res = count;
+ if (scsi_debug_delay != delay) {
+ unsigned long iflags;
+ int k;
+
+ spin_lock_irqsave(&queued_arr_lock, iflags);
+ k = find_first_bit(queued_in_use_bm,
+ scsi_debug_max_queue);
+ if (k != scsi_debug_max_queue)
+ res = -EBUSY; /* have queued commands */
+ else {
+ scsi_debug_delay = delay;
+ scsi_debug_ndelay = 0;
+ }
+ spin_unlock_irqrestore(&queued_arr_lock, iflags);
+ }
+ return res;
+ }
+ return -EINVAL;
+}
+static DRIVER_ATTR_RW(delay);
+
+static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ndelay);
+}
+/* Returns -EBUSY if ndelay is being changed and commands are queued */
+/* If > 0 and accepted then scsi_debug_delay is set to DELAY_OVERRIDDEN */
+static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
+ size_t count)
+{
+ unsigned long iflags;
+ int ndelay, res, k;
+
+ if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
+ (ndelay >= 0) && (ndelay < 1000000000)) {
+ res = count;
+ if (scsi_debug_ndelay != ndelay) {
+ spin_lock_irqsave(&queued_arr_lock, iflags);
+ k = find_first_bit(queued_in_use_bm,
+ scsi_debug_max_queue);
+ if (k != scsi_debug_max_queue)
+ res = -EBUSY; /* have queued commands */
+ else {
+ scsi_debug_ndelay = ndelay;
+ scsi_debug_delay = ndelay ? DELAY_OVERRIDDEN
+ : DEF_DELAY;
+ }
+ spin_unlock_irqrestore(&queued_arr_lock, iflags);
+ }
+ return res;
+ }
+ return -EINVAL;
+}
+static DRIVER_ATTR_RW(ndelay);
+
+static ssize_t opts_show(struct device_driver *ddp, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
+}
+
+static ssize_t opts_store(struct device_driver *ddp, const char *buf,
+ size_t count)
+{
+ int opts;
+ char work[20];
+
+ if (1 == sscanf(buf, "%10s", work)) {
+ if (0 == strncasecmp(work,"0x", 2)) {
+ if (1 == sscanf(&work[2], "%x", &opts))
+ goto opts_done;
+ } else {
+ if (1 == sscanf(work, "%d", &opts))
+ goto opts_done;
+ }
+ }
+ return -EINVAL;
+opts_done:
+ scsi_debug_opts = opts;
+ if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
+ sdebug_any_injecting_opt = true;
+ else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
+ sdebug_any_injecting_opt = true;
+ else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
+ sdebug_any_injecting_opt = true;
+ else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
+ sdebug_any_injecting_opt = true;
+ else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
+ sdebug_any_injecting_opt = true;
+ atomic_set(&sdebug_cmnd_count, 0);
+ atomic_set(&sdebug_a_tsf, 0);
+ return count;
+}
+static DRIVER_ATTR_RW(opts);
+
+static ssize_t ptype_show(struct device_driver *ddp, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
+}
+static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
+ size_t count)
+{
+ int n;
+
+ if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
+ scsi_debug_ptype = n;
+ return count;
+ }
+ return -EINVAL;
+}
+static DRIVER_ATTR_RW(ptype);
+
+static ssize_t dsense_show(struct device_driver *ddp, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
+}
+static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
+ size_t count)
+{
+ int n;
+
+ if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
+ scsi_debug_dsense = n;
+ return count;
+ }
+ return -EINVAL;
+}
+static DRIVER_ATTR_RW(dsense);
+
+static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
+}
+static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
+ size_t count)
+{
+ int n;
+
+ if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
+ n = (n > 0);
+ scsi_debug_fake_rw = (scsi_debug_fake_rw > 0);
+ if (scsi_debug_fake_rw != n) {
+ if ((0 == n) && (NULL == fake_storep)) {
+ unsigned long sz =
+ (unsigned long)scsi_debug_dev_size_mb *
+ 1048576;
+
+ fake_storep = vmalloc(sz);
+ if (NULL == fake_storep) {
+ pr_err("%s: out of memory, 9\n",
+ __func__);
+ return -ENOMEM;
+ }
+ memset(fake_storep, 0, sz);
+ }
+ scsi_debug_fake_rw = n;
+ }
+ return count;
+ }
+ return -EINVAL;
+}
+static DRIVER_ATTR_RW(fake_rw);
+
+static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0);
+}
+static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
+ size_t count)
+{
+ int n;
+
+ if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
+ scsi_debug_no_lun_0 = n;
+ return count;
+ }
+ return -EINVAL;
+}
+static DRIVER_ATTR_RW(no_lun_0);
+
+static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
+}
+static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
+ size_t count)
+{
+ int n;
+
+ if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
+ scsi_debug_num_tgts = n;
+ sdebug_max_tgts_luns();
+ return count;
+ }
+ return -EINVAL;
+}
+static DRIVER_ATTR_RW(num_tgts);
+
+static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
+}
+static DRIVER_ATTR_RO(dev_size_mb);
+
+static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
+}
+static DRIVER_ATTR_RO(num_parts);
+
+static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
+}
+static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
+ size_t count)
+{
+ int nth;
+
+ if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
+ scsi_debug_every_nth = nth;
+ atomic_set(&sdebug_cmnd_count, 0);
+ return count;
+ }
+ return -EINVAL;
+}
+static DRIVER_ATTR_RW(every_nth);
+
+static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
+}
+static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
+ size_t count)
+{
+ int n;
+ bool changed;
+
+ if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
+ changed = (scsi_debug_max_luns != n);
+ scsi_debug_max_luns = n;
+ sdebug_max_tgts_luns();
+ if (changed && (scsi_debug_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", scsi_debug_max_queue);
+}
+/* N.B. max_queue can be changed while there are queued commands. In flight
+ * commands beyond the new max_queue will be completed. */
+static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
+ size_t count)
+{
+ unsigned long iflags;
+ int n, k;
+
+ if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
+ (n <= SCSI_DEBUG_CANQUEUE)) {
+ spin_lock_irqsave(&queued_arr_lock, iflags);
+ k = find_last_bit(queued_in_use_bm, SCSI_DEBUG_CANQUEUE);
+ scsi_debug_max_queue = n;
+ if (SCSI_DEBUG_CANQUEUE == k)
+ atomic_set(&retired_max_queue, 0);
+ else if (k >= n)
+ atomic_set(&retired_max_queue, k + 1);
+ else
+ atomic_set(&retired_max_queue, 0);
+ spin_unlock_irqrestore(&queued_arr_lock, iflags);
+ return count;
+ }
+ return -EINVAL;
+}
+static DRIVER_ATTR_RW(max_queue);
+
+static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld);
+}
+static DRIVER_ATTR_RO(no_uld);
+
+static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
+}
+static DRIVER_ATTR_RO(scsi_level);
+
+static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb);
+}
+static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
+ size_t count)
+{
+ int n;
+ bool changed;
+
+ if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
+ changed = (scsi_debug_virtual_gb != n);
+ scsi_debug_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", scsi_debug_add_host);
+}
+
+static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
+ size_t count)
+{
+ int delta_hosts;
+
+ if (sscanf(buf, "%d", &delta_hosts) != 1)
+ return -EINVAL;
+ if (delta_hosts > 0) {
+ do {
+ sdebug_add_adapter();
+ } while (--delta_hosts);
+ } else if (delta_hosts < 0) {
+ do {
+ sdebug_remove_adapter();
+ } while (++delta_hosts);
+ }
+ return count;
+}
+static DRIVER_ATTR_RW(add_host);
+
+static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno);
+}
+static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
+ size_t count)
+{
+ int n;
+
+ if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
+ scsi_debug_vpd_use_hostno = n;
+ return count;
+ }
+ return -EINVAL;
+}
+static DRIVER_ATTR_RW(vpd_use_hostno);
+
+static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size);
+}
+static DRIVER_ATTR_RO(sector_size);
+
+static ssize_t dix_show(struct device_driver *ddp, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix);
+}
+static DRIVER_ATTR_RO(dix);
+
+static ssize_t dif_show(struct device_driver *ddp, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif);
+}
+static DRIVER_ATTR_RO(dif);
+
+static ssize_t guard_show(struct device_driver *ddp, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_guard);
+}
+static DRIVER_ATTR_RO(guard);
+
+static ssize_t ato_show(struct device_driver *ddp, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato);
+}
+static DRIVER_ATTR_RO(ato);
+
+static ssize_t map_show(struct device_driver *ddp, char *buf)
+{
+ ssize_t count;
+
+ if (!scsi_debug_lbp())
+ return scnprintf(buf, PAGE_SIZE, "0-%u\n",
+ sdebug_store_sectors);
+
+ count = 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", scsi_debug_removable ? 1 : 0);
+}
+static ssize_t removable_store(struct device_driver *ddp, const char *buf,
+ size_t count)
+{
+ int n;
+
+ if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
+ scsi_debug_removable = (n > 0);
+ return count;
+ }
+ return -EINVAL;
+}
+static DRIVER_ATTR_RW(removable);
+
+static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%d\n", !!scsi_debug_host_lock);
+}
+/* Returns -EBUSY if host_lock is being changed and commands are queued */
+static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
+ size_t count)
+{
+ int n, res;
+
+ if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
+ bool new_host_lock = (n > 0);
+
+ res = count;
+ if (new_host_lock != scsi_debug_host_lock) {
+ unsigned long iflags;
+ int k;
+
+ spin_lock_irqsave(&queued_arr_lock, iflags);
+ k = find_first_bit(queued_in_use_bm,
+ scsi_debug_max_queue);
+ if (k != scsi_debug_max_queue)
+ res = -EBUSY; /* have queued commands */
+ else
+ scsi_debug_host_lock = new_host_lock;
+ spin_unlock_irqrestore(&queued_arr_lock, iflags);
+ }
+ return res;
+ }
+ return -EINVAL;
+}
+static DRIVER_ATTR_RW(host_lock);
+
+static ssize_t strict_show(struct device_driver *ddp, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%d\n", !!scsi_debug_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)) {
+ scsi_debug_strict = (n > 0);
+ return count;
+ }
+ return -EINVAL;
+}
+static DRIVER_ATTR_RW(strict);
+
+
+/* Note: The following array creates attribute files in the
+ /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
+ files (over those found in the /sys/module/scsi_debug/parameters
+ directory) is that auxiliary actions can be triggered when an attribute
+ is changed. For example see: sdebug_add_host_store() above.
+ */
+
+static struct attribute *sdebug_drv_attrs[] = {
+ &driver_attr_delay.attr,
+ &driver_attr_opts.attr,
+ &driver_attr_ptype.attr,
+ &driver_attr_dsense.attr,
+ &driver_attr_fake_rw.attr,
+ &driver_attr_no_lun_0.attr,
+ &driver_attr_num_tgts.attr,
+ &driver_attr_dev_size_mb.attr,
+ &driver_attr_num_parts.attr,
+ &driver_attr_every_nth.attr,
+ &driver_attr_max_luns.attr,
+ &driver_attr_max_queue.attr,
+ &driver_attr_no_uld.attr,
+ &driver_attr_scsi_level.attr,
+ &driver_attr_virtual_gb.attr,
+ &driver_attr_add_host.attr,
+ &driver_attr_vpd_use_hostno.attr,
+ &driver_attr_sector_size.attr,
+ &driver_attr_dix.attr,
+ &driver_attr_dif.attr,
+ &driver_attr_guard.attr,
+ &driver_attr_ato.attr,
+ &driver_attr_map.attr,
+ &driver_attr_removable.attr,
+ &driver_attr_host_lock.attr,
+ &driver_attr_ndelay.attr,
+ &driver_attr_strict.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(sdebug_drv);
+
+static struct device *pseudo_primary;
+
+static int __init scsi_debug_init(void)
+{
+ unsigned long sz;
+ int host_to_add;
+ int k;
+ int ret;
+
+ atomic_set(&sdebug_cmnd_count, 0);
+ atomic_set(&sdebug_completions, 0);
+ atomic_set(&retired_max_queue, 0);
+
+ if (scsi_debug_ndelay >= 1000000000) {
+ pr_warn("%s: ndelay must be less than 1 second, ignored\n",
+ __func__);
+ scsi_debug_ndelay = 0;
+ } else if (scsi_debug_ndelay > 0)
+ scsi_debug_delay = DELAY_OVERRIDDEN;
+
+ switch (scsi_debug_sector_size) {
+ case 512:
+ case 1024:
+ case 2048:
+ case 4096:
+ break;
+ default:
+ pr_err("%s: invalid sector_size %d\n", __func__,
+ scsi_debug_sector_size);
+ return -EINVAL;
+ }
+
+ switch (scsi_debug_dif) {
+
+ case SD_DIF_TYPE0_PROTECTION:
+ case SD_DIF_TYPE1_PROTECTION:
+ case SD_DIF_TYPE2_PROTECTION:
+ case SD_DIF_TYPE3_PROTECTION:
+ break;
+
+ default:
+ pr_err("%s: dif must be 0, 1, 2 or 3\n", __func__);
+ return -EINVAL;
+ }
+
+ if (scsi_debug_guard > 1) {
+ pr_err("%s: guard must be 0 or 1\n", __func__);
+ return -EINVAL;
+ }
+
+ if (scsi_debug_ato > 1) {
+ pr_err("%s: ato must be 0 or 1\n", __func__);
+ return -EINVAL;
+ }
+
+ if (scsi_debug_physblk_exp > 15) {
+ pr_err("%s: invalid physblk_exp %u\n", __func__,
+ scsi_debug_physblk_exp);
+ return -EINVAL;
+ }
+
+ if (scsi_debug_lowest_aligned > 0x3fff) {
+ pr_err("%s: lowest_aligned too big: %u\n", __func__,
+ scsi_debug_lowest_aligned);
+ return -EINVAL;
+ }
+
+ if (scsi_debug_dev_size_mb < 1)
+ scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
+ sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;
+ sdebug_store_sectors = sz / scsi_debug_sector_size;
+ sdebug_capacity = get_sdebug_capacity();
+
+ /* play around with geometry, don't waste too much on track 0 */
+ sdebug_heads = 8;
+ sdebug_sectors_per = 32;
+ if (scsi_debug_dev_size_mb >= 16)
+ sdebug_heads = 32;
+ else if (scsi_debug_dev_size_mb >= 256)
+ sdebug_heads = 64;
+ sdebug_cylinders_per = (unsigned long)sdebug_capacity /
+ (sdebug_sectors_per * sdebug_heads);
+ if (sdebug_cylinders_per >= 1024) {
+ /* other LLDs do this; implies >= 1GB ram disk ... */
+ sdebug_heads = 255;
+ sdebug_sectors_per = 63;
+ sdebug_cylinders_per = (unsigned long)sdebug_capacity /
+ (sdebug_sectors_per * sdebug_heads);
+ }
+
+ if (0 == scsi_debug_fake_rw) {
+ fake_storep = vmalloc(sz);
+ if (NULL == fake_storep) {
+ pr_err("%s: out of memory, 1\n", __func__);
+ return -ENOMEM;
+ }
+ memset(fake_storep, 0, sz);
+ if (scsi_debug_num_parts > 0)
+ sdebug_build_parts(fake_storep, sz);
+ }
+
+ if (scsi_debug_dix) {
+ int dif_size;
+
+ dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple);
+ dif_storep = vmalloc(dif_size);
+
+ pr_err("%s: dif_storep %u bytes @ %p\n", __func__, dif_size,
+ dif_storep);
+
+ if (dif_storep == NULL) {
+ pr_err("%s: out of mem. (DIX)\n", __func__);
+ ret = -ENOMEM;
+ goto free_vm;
+ }
+
+ memset(dif_storep, 0xff, dif_size);
+ }
+
+ /* Logical Block Provisioning */
+ if (scsi_debug_lbp()) {
+ scsi_debug_unmap_max_blocks =
+ clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU);
+
+ scsi_debug_unmap_max_desc =
+ clamp(scsi_debug_unmap_max_desc, 0U, 256U);
+
+ scsi_debug_unmap_granularity =
+ clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU);
+
+ if (scsi_debug_unmap_alignment &&
+ scsi_debug_unmap_granularity <=
+ scsi_debug_unmap_alignment) {
+ pr_err("%s: ERR: unmap_granularity <= unmap_alignment\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
+ map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long));
+
+ pr_info("%s: %lu provisioning blocks\n", __func__, map_size);
+
+ if (map_storep == NULL) {
+ pr_err("%s: out of mem. (MAP)\n", __func__);
+ ret = -ENOMEM;
+ goto free_vm;
+ }
+
+ bitmap_zero(map_storep, map_size);
+
+ /* Map first 1KB for partition table */
+ if (scsi_debug_num_parts)
+ map_region(0, 2);
+ }
+
+ pseudo_primary = root_device_register("pseudo_0");
+ if (IS_ERR(pseudo_primary)) {
+ pr_warn("%s: root_device_register() error\n", __func__);
+ ret = PTR_ERR(pseudo_primary);
+ goto free_vm;
+ }
+ ret = bus_register(&pseudo_lld_bus);
+ if (ret < 0) {
+ pr_warn("%s: bus_register error: %d\n", __func__, ret);
+ goto dev_unreg;
+ }
+ ret = driver_register(&sdebug_driverfs_driver);
+ if (ret < 0) {
+ pr_warn("%s: driver_register error: %d\n", __func__, ret);
+ goto bus_unreg;
+ }
+
+ host_to_add = scsi_debug_add_host;
+ scsi_debug_add_host = 0;
+
+ for (k = 0; k < host_to_add; k++) {
+ if (sdebug_add_adapter()) {
+ pr_err("%s: sdebug_add_adapter failed k=%d\n",
+ __func__, k);
+ break;
+ }
+ }
+
+ if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
+ pr_info("%s: built %d host(s)\n", __func__,
+ scsi_debug_add_host);
+ }
+ return 0;
+
+bus_unreg:
+ bus_unregister(&pseudo_lld_bus);
+dev_unreg:
+ root_device_unregister(pseudo_primary);
+free_vm:
+ if (map_storep)
+ vfree(map_storep);
+ if (dif_storep)
+ vfree(dif_storep);
+ vfree(fake_storep);
+
+ return ret;
+}
+
+static void __exit scsi_debug_exit(void)
+{
+ int k = scsi_debug_add_host;
+
+ stop_all_queued();
+ free_all_queued();
+ for (; k; k--)
+ sdebug_remove_adapter();
+ driver_unregister(&sdebug_driverfs_driver);
+ bus_unregister(&pseudo_lld_bus);
+ root_device_unregister(pseudo_primary);
+
+ if (dif_storep)
+ vfree(dif_storep);
+
+ vfree(fake_storep);
+}
+
+device_initcall(scsi_debug_init);
+module_exit(scsi_debug_exit);
+
+static void sdebug_release_adapter(struct device * dev)
+{
+ struct sdebug_host_info *sdbg_host;
+
+ sdbg_host = to_sdebug_host(dev);
+ kfree(sdbg_host);
+}
+
+static int sdebug_add_adapter(void)
+{
+ int k, devs_per_host;
+ int error = 0;
+ struct sdebug_host_info *sdbg_host;
+ struct sdebug_dev_info *sdbg_devinfo, *tmp;
+
+ sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
+ if (NULL == sdbg_host) {
+ printk(KERN_ERR "%s: out of memory at line %d\n",
+ __func__, __LINE__);
+ return -ENOMEM;
+ }
+
+ INIT_LIST_HEAD(&sdbg_host->dev_info_list);
+
+ devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns;
+ for (k = 0; k < devs_per_host; k++) {
+ sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
+ if (!sdbg_devinfo) {
+ printk(KERN_ERR "%s: out of memory at line %d\n",
+ __func__, __LINE__);
+ error = -ENOMEM;
+ goto clean;
+ }
+ }
+
+ spin_lock(&sdebug_host_list_lock);
+ list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
+ spin_unlock(&sdebug_host_list_lock);
+
+ sdbg_host->dev.bus = &pseudo_lld_bus;
+ sdbg_host->dev.parent = pseudo_primary;
+ sdbg_host->dev.release = &sdebug_release_adapter;
+ dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);
+
+ error = device_register(&sdbg_host->dev);
+
+ if (error)
+ goto clean;
+
+ ++scsi_debug_add_host;
+ return error;
+
+clean:
+ list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
+ dev_list) {
+ list_del(&sdbg_devinfo->dev_list);
+ kfree(sdbg_devinfo);
+ }
+
+ kfree(sdbg_host);
+ return error;
+}
+
+static void sdebug_remove_adapter(void)
+{
+ struct sdebug_host_info * sdbg_host = NULL;
+
+ spin_lock(&sdebug_host_list_lock);
+ if (!list_empty(&sdebug_host_list)) {
+ sdbg_host = list_entry(sdebug_host_list.prev,
+ struct sdebug_host_info, host_list);
+ list_del(&sdbg_host->host_list);
+ }
+ spin_unlock(&sdebug_host_list_lock);
+
+ if (!sdbg_host)
+ return;
+
+ device_unregister(&sdbg_host->dev);
+ --scsi_debug_add_host;
+}
+
+static int
+sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
+{
+ int num_in_q = 0;
+ unsigned long iflags;
+ struct sdebug_dev_info *devip;
+
+ spin_lock_irqsave(&queued_arr_lock, iflags);
+ devip = (struct sdebug_dev_info *)sdev->hostdata;
+ if (NULL == devip) {
+ spin_unlock_irqrestore(&queued_arr_lock, iflags);
+ return -ENODEV;
+ }
+ num_in_q = atomic_read(&devip->num_in_q);
+ spin_unlock_irqrestore(&queued_arr_lock, iflags);
+
+ if (qdepth < 1)
+ qdepth = 1;
+ /* allow to exceed max host queued_arr elements for testing */
+ if (qdepth > SCSI_DEBUG_CANQUEUE + 10)
+ qdepth = SCSI_DEBUG_CANQUEUE + 10;
+ scsi_change_queue_depth(sdev, qdepth);
+
+ if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) {
+ sdev_printk(KERN_INFO, sdev,
+ "%s: qdepth=%d, num_in_q=%d\n",
+ __func__, qdepth, num_in_q);
+ }
+ return sdev->queue_depth;
+}
+
+static int
+check_inject(struct scsi_cmnd *scp)
+{
+ struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
+
+ memset(ep, 0, sizeof(struct sdebug_scmd_extra_t));
+
+ if (atomic_inc_return(&sdebug_cmnd_count) >=
+ abs(scsi_debug_every_nth)) {
+ atomic_set(&sdebug_cmnd_count, 0);
+ if (scsi_debug_every_nth < -1)
+ scsi_debug_every_nth = -1;
+ if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
+ return 1; /* ignore command causing timeout */
+ else if (SCSI_DEBUG_OPT_MAC_TIMEOUT & scsi_debug_opts &&
+ scsi_medium_access_command(scp))
+ return 1; /* time out reads and writes */
+ if (sdebug_any_injecting_opt) {
+ int opts = scsi_debug_opts;
+
+ if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
+ ep->inj_recovered = true;
+ else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
+ ep->inj_transport = true;
+ else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
+ ep->inj_dif = true;
+ else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
+ ep->inj_dix = true;
+ else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
+ ep->inj_short = true;
+ }
+ }
+ return 0;
+}
+
+static int
+scsi_debug_queuecommand(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 k, na;
+ int errsts = 0;
+ int errsts_no_connect = DID_NO_CONNECT << 16;
+ u32 flags;
+ u16 sa;
+ u8 opcode = cmd[0];
+ bool has_wlun_rl;
+ bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts);
+
+ scsi_set_resid(scp, 0);
+ if (debug && !(SCSI_DEBUG_OPT_NO_CDB_NOISE & scsi_debug_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: cmd %s\n", my_name, b);
+ }
+ has_wlun_rl = (sdp->lun == SAM2_WLUN_REPORT_LUNS);
+ if ((sdp->lun >= scsi_debug_max_luns) && !has_wlun_rl)
+ return schedule_resp(scp, NULL, errsts_no_connect, 0);
+
+ 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 (!devip) {
+ devip = devInfoReg(sdp);
+ if (NULL == devip)
+ return schedule_resp(scp, NULL, errsts_no_connect, 0);
+ }
+ 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 (F_INV_OP & flags) {
+ mk_sense_invalid_opcode(scp);
+ goto check_cond;
+ }
+ if (has_wlun_rl && !(F_RL_WLUN_OK & flags)) {
+ if (debug)
+ sdev_printk(KERN_INFO, sdp, "scsi_debug: Opcode: "
+ "0x%x not supported for wlun\n", opcode);
+ mk_sense_invalid_opcode(scp);
+ goto check_cond;
+ }
+ if (scsi_debug_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 (!(F_SKIP_UA & flags) &&
+ SDEBUG_NUM_UAS != find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS)) {
+ errsts = check_readiness(scp, UAS_ONLY, devip);
+ if (errsts)
+ goto check_cond;
+ }
+ if ((F_M_ACCESS & flags) && devip->stopped) {
+ mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
+ if (debug)
+ sdev_printk(KERN_INFO, sdp, "%s reports: Not ready: "
+ "%s\n", my_name, "initializing command "
+ "required");
+ errsts = check_condition_result;
+ goto fini;
+ }
+ if (scsi_debug_fake_rw && (F_FAKE_RW & flags))
+ goto fini;
+ if (scsi_debug_every_nth) {
+ if (check_inject(scp))
+ return 0; /* ignore command: make trouble */
+ }
+ if (oip->pfp) /* if this command has a resp_* function, call it */
+ errsts = oip->pfp(scp, devip);
+ else if (r_pfp) /* if leaf function ptr NULL, try the root's */
+ errsts = r_pfp(scp, devip);
+
+fini:
+ return schedule_resp(scp, devip, errsts,
+ ((F_DELAY_OVERR & flags) ? 0 : scsi_debug_delay));
+check_cond:
+ return schedule_resp(scp, devip, check_condition_result, 0);
+}
+
+static int
+sdebug_queuecommand_lock_or_not(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
+{
+ if (scsi_debug_host_lock) {
+ unsigned long iflags;
+ int rc;
+
+ spin_lock_irqsave(shost->host_lock, iflags);
+ rc = scsi_debug_queuecommand(cmd);
+ spin_unlock_irqrestore(shost->host_lock, iflags);
+ return rc;
+ } else
+ return scsi_debug_queuecommand(cmd);
+}
+
+static struct scsi_host_template sdebug_driver_template = {
+ .show_info = scsi_debug_show_info,
+ .write_info = scsi_debug_write_info,
+ .proc_name = sdebug_proc_name,
+ .name = "SCSI DEBUG",
+ .info = scsi_debug_info,
+ .slave_alloc = scsi_debug_slave_alloc,
+ .slave_configure = scsi_debug_slave_configure,
+ .slave_destroy = scsi_debug_slave_destroy,
+ .ioctl = scsi_debug_ioctl,
+ .queuecommand = sdebug_queuecommand_lock_or_not,
+ .change_queue_depth = sdebug_change_qdepth,
+ .eh_abort_handler = scsi_debug_abort,
+ .eh_device_reset_handler = scsi_debug_device_reset,
+ .eh_target_reset_handler = scsi_debug_target_reset,
+ .eh_bus_reset_handler = scsi_debug_bus_reset,
+ .eh_host_reset_handler = scsi_debug_host_reset,
+ .can_queue = SCSI_DEBUG_CANQUEUE,
+ .this_id = 7,
+ .sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS,
+ .cmd_per_lun = DEF_CMD_PER_LUN,
+ .max_sectors = -1U,
+ .use_clustering = DISABLE_CLUSTERING,
+ .module = THIS_MODULE,
+ .track_queue_depth = 1,
+ .cmd_size = sizeof(struct sdebug_scmd_extra_t),
+};
+
+static int sdebug_driver_probe(struct device * dev)
+{
+ int error = 0;
+ int opts;
+ struct sdebug_host_info *sdbg_host;
+ struct Scsi_Host *hpnt;
+ int host_prot;
+
+ sdbg_host = to_sdebug_host(dev);
+
+ sdebug_driver_template.can_queue = scsi_debug_max_queue;
+ if (scsi_debug_clustering)
+ sdebug_driver_template.use_clustering = ENABLE_CLUSTERING;
+ hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
+ if (NULL == hpnt) {
+ pr_err("%s: scsi_host_alloc failed\n", __func__);
+ error = -ENODEV;
+ return error;
+ }
+
+ sdbg_host->shost = hpnt;
+ *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
+ if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id))
+ hpnt->max_id = scsi_debug_num_tgts + 1;
+ else
+ hpnt->max_id = scsi_debug_num_tgts;
+ hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* = scsi_debug_max_luns; */
+
+ host_prot = 0;
+
+ switch (scsi_debug_dif) {
+
+ case SD_DIF_TYPE1_PROTECTION:
+ host_prot = SHOST_DIF_TYPE1_PROTECTION;
+ if (scsi_debug_dix)
+ host_prot |= SHOST_DIX_TYPE1_PROTECTION;
+ break;
+
+ case SD_DIF_TYPE2_PROTECTION:
+ host_prot = SHOST_DIF_TYPE2_PROTECTION;
+ if (scsi_debug_dix)
+ host_prot |= SHOST_DIX_TYPE2_PROTECTION;
+ break;
+
+ case SD_DIF_TYPE3_PROTECTION:
+ host_prot = SHOST_DIF_TYPE3_PROTECTION;
+ if (scsi_debug_dix)
+ host_prot |= SHOST_DIX_TYPE3_PROTECTION;
+ break;
+
+ default:
+ if (scsi_debug_dix)
+ host_prot |= SHOST_DIX_TYPE0_PROTECTION;
+ break;
+ }
+
+ scsi_host_set_prot(hpnt, host_prot);
+
+ printk(KERN_INFO "scsi_debug: host protection%s%s%s%s%s%s%s\n",
+ (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
+ (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
+ (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
+ (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
+ (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
+ (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
+ (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
+
+ if (scsi_debug_guard == 1)
+ scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
+ else
+ scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
+
+ opts = scsi_debug_opts;
+ if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
+ sdebug_any_injecting_opt = true;
+ else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
+ sdebug_any_injecting_opt = true;
+ else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
+ sdebug_any_injecting_opt = true;
+ else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
+ sdebug_any_injecting_opt = true;
+ else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
+ sdebug_any_injecting_opt = true;
+
+ error = scsi_add_host(hpnt, &sdbg_host->dev);
+ if (error) {
+ printk(KERN_ERR "%s: scsi_add_host failed\n", __func__);
+ error = -ENODEV;
+ scsi_host_put(hpnt);
+ } else
+ scsi_scan_host(hpnt);
+
+ return error;
+}
+
+static int sdebug_driver_remove(struct device * dev)
+{
+ struct sdebug_host_info *sdbg_host;
+ struct sdebug_dev_info *sdbg_devinfo, *tmp;
+
+ sdbg_host = to_sdebug_host(dev);
+
+ if (!sdbg_host) {
+ printk(KERN_ERR "%s: Unable to locate host info\n",
+ __func__);
+ return -ENODEV;
+ }
+
+ scsi_remove_host(sdbg_host->shost);
+
+ list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
+ dev_list) {
+ list_del(&sdbg_devinfo->dev_list);
+ kfree(sdbg_devinfo);
+ }
+
+ scsi_host_put(sdbg_host->shost);
+ return 0;
+}
+
+static int pseudo_lld_bus_match(struct device *dev,
+ struct device_driver *dev_driver)
+{
+ return 1;
+}
+
+static struct bus_type pseudo_lld_bus = {
+ .name = "pseudo",
+ .match = pseudo_lld_bus_match,
+ .probe = sdebug_driver_probe,
+ .remove = sdebug_driver_remove,
+ .drv_groups = sdebug_drv_groups,
+};
Code Review / kvmfornfv.git / blobdiff