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![Douglas Gilbert](/assets/img/avatar_default.png)
- add host_lock option whose default value is 0 which removes the host_lock around all queued commands - accept delay=-1 (_hi_) or -2 which use a tasklet to invoke the scsi_done callback into the mid-layer. The default is still delay=1 which uses a timer to delay 1 jiffy - wire .change_queue_depth and .change_queue_type functions to better simulate queueing in a modern LLD - add SCSI_DEBUG_OPT_Q_NOISE (0x200) mask to only produce debug output associated with queue full, plus from .change_queue_depth and .change_queue_type functions - add SCSI_DEBUG_OPT_ALL_TSF (0x400) mask which reports all queued_arr fulls at TASK_SET_FULL, otherwise SCSI_MLQUEUE_HOST_BUSY is returned - add SCSI_DEBUG_OPT_RARE_TSF (0x800) mask which works together with the every_nth option (> 0) to count occurrences of num_in_q==queue_depth. When every_nth is reached the victim (a command) yields TASK SET FULL - clean up many debug messages. - add ndelay=<nanosecs> option that uses high resolution timers; active if > 0 and then overrides delay= option - expand Unit Attention handling: POR, BUS_RESET and MODE PARAMETERS CHANGED - support .eh_target_reset_handler and drop .bios_param - add OPT_N_WCE mask so caching page yields WCE=0 - add OPT_RESET_NOISE mask to log aborts and resets - add OPT_NO_CDB_NOISE mask to not log each cdb - MODE SELECT support for changing caching page's WCE - name common ioctls in log - when fake_rw=1, do not vmalloc fake store; make UNMAP and WRITE SAME obey fake_rw - more logging and code improvements including better sense buffer handling With fio and four (pseudo) devices I have observed 1.2 M IOPS on my equipment. Rob Elliott who has done much testing and made numerous suggestions, has better IOPS results than mine. Signed-off-by: Douglas Gilbert <dgilbert@interlog.com> Reviewed-by: Robert Elliott <elliott@hp.com> Tested-by: Robert Elliott <elliott@hp.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
4707 lines
134 KiB
C
4707 lines
134 KiB
C
/*
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* vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
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* Copyright (C) 1992 Eric Youngdale
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* Simulate a host adapter with 2 disks attached. Do a lot of checking
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* to make sure that we are not getting blocks mixed up, and PANIC if
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* anything out of the ordinary is seen.
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* ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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*
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* This version is more generic, simulating a variable number of disk
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* (or disk like devices) sharing a common amount of RAM. To be more
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* realistic, the simulated devices have the transport attributes of
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* SAS disks.
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*
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*
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* For documentation see http://sg.danny.cz/sg/sdebug26.html
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*
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* D. Gilbert (dpg) work for Magneto-Optical device test [20010421]
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* dpg: work for devfs large number of disks [20010809]
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* forked for lk 2.5 series [20011216, 20020101]
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* use vmalloc() more inquiry+mode_sense [20020302]
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* add timers for delayed responses [20020721]
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* Patrick Mansfield <patmans@us.ibm.com> max_luns+scsi_level [20021031]
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* Mike Anderson <andmike@us.ibm.com> sysfs work [20021118]
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* dpg: change style of boot options to "scsi_debug.num_tgts=2" and
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* module options to "modprobe scsi_debug num_tgts=2" [20021221]
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/timer.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/genhd.h>
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#include <linux/fs.h>
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#include <linux/init.h>
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#include <linux/proc_fs.h>
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#include <linux/vmalloc.h>
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#include <linux/moduleparam.h>
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#include <linux/scatterlist.h>
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#include <linux/blkdev.h>
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#include <linux/crc-t10dif.h>
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#include <linux/spinlock.h>
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#include <linux/interrupt.h>
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#include <linux/atomic.h>
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#include <linux/hrtimer.h>
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#include <net/checksum.h>
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#include <asm/unaligned.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsicam.h>
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#include <scsi/scsi_eh.h>
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#include <scsi/scsi_tcq.h>
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#include <scsi/scsi_dbg.h>
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#include "sd.h"
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#include "scsi_logging.h"
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#define SCSI_DEBUG_VERSION "1.84"
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static const char *scsi_debug_version_date = "20140706";
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#define MY_NAME "scsi_debug"
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/* Additional Sense Code (ASC) */
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#define NO_ADDITIONAL_SENSE 0x0
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#define LOGICAL_UNIT_NOT_READY 0x4
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#define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
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#define UNRECOVERED_READ_ERR 0x11
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#define PARAMETER_LIST_LENGTH_ERR 0x1a
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#define INVALID_OPCODE 0x20
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#define ADDR_OUT_OF_RANGE 0x21
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#define INVALID_COMMAND_OPCODE 0x20
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#define INVALID_FIELD_IN_CDB 0x24
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#define INVALID_FIELD_IN_PARAM_LIST 0x26
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#define UA_RESET_ASC 0x29
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#define UA_CHANGED_ASC 0x2a
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#define POWER_ON_RESET_ASCQ 0x0
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#define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
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#define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
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#define SAVING_PARAMS_UNSUP 0x39
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#define TRANSPORT_PROBLEM 0x4b
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#define THRESHOLD_EXCEEDED 0x5d
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#define LOW_POWER_COND_ON 0x5e
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/* Additional Sense Code Qualifier (ASCQ) */
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#define ACK_NAK_TO 0x3
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/* Default values for driver parameters */
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#define DEF_NUM_HOST 1
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#define DEF_NUM_TGTS 1
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#define DEF_MAX_LUNS 1
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/* With these defaults, this driver will make 1 host with 1 target
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* (id 0) containing 1 logical unit (lun 0). That is 1 device.
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*/
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#define DEF_ATO 1
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#define DEF_DELAY 1 /* if > 0 unit is a jiffy */
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#define DEF_DEV_SIZE_MB 8
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#define DEF_DIF 0
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#define DEF_DIX 0
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#define DEF_D_SENSE 0
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#define DEF_EVERY_NTH 0
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#define DEF_FAKE_RW 0
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#define DEF_GUARD 0
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#define DEF_HOST_LOCK 0
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#define DEF_LBPU 0
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#define DEF_LBPWS 0
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#define DEF_LBPWS10 0
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#define DEF_LBPRZ 1
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#define DEF_LOWEST_ALIGNED 0
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#define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
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#define DEF_NO_LUN_0 0
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#define DEF_NUM_PARTS 0
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#define DEF_OPTS 0
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#define DEF_OPT_BLKS 64
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#define DEF_PHYSBLK_EXP 0
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#define DEF_PTYPE 0
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#define DEF_REMOVABLE false
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#define DEF_SCSI_LEVEL 5 /* INQUIRY, byte2 [5->SPC-3] */
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#define DEF_SECTOR_SIZE 512
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#define DEF_TAGGED_QUEUING 0 /* 0 | MSG_SIMPLE_TAG | MSG_ORDERED_TAG */
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#define DEF_UNMAP_ALIGNMENT 0
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#define DEF_UNMAP_GRANULARITY 1
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#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
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#define DEF_UNMAP_MAX_DESC 256
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#define DEF_VIRTUAL_GB 0
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#define DEF_VPD_USE_HOSTNO 1
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#define DEF_WRITESAME_LENGTH 0xFFFF
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#define DELAY_OVERRIDDEN -9999
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/* bit mask values for scsi_debug_opts */
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#define SCSI_DEBUG_OPT_NOISE 1
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#define SCSI_DEBUG_OPT_MEDIUM_ERR 2
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#define SCSI_DEBUG_OPT_TIMEOUT 4
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#define SCSI_DEBUG_OPT_RECOVERED_ERR 8
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#define SCSI_DEBUG_OPT_TRANSPORT_ERR 16
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#define SCSI_DEBUG_OPT_DIF_ERR 32
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#define SCSI_DEBUG_OPT_DIX_ERR 64
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#define SCSI_DEBUG_OPT_MAC_TIMEOUT 128
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#define SCSI_DEBUG_OPT_SHORT_TRANSFER 0x100
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#define SCSI_DEBUG_OPT_Q_NOISE 0x200
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#define SCSI_DEBUG_OPT_ALL_TSF 0x400
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#define SCSI_DEBUG_OPT_RARE_TSF 0x800
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#define SCSI_DEBUG_OPT_N_WCE 0x1000
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#define SCSI_DEBUG_OPT_RESET_NOISE 0x2000
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#define SCSI_DEBUG_OPT_NO_CDB_NOISE 0x4000
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#define SCSI_DEBUG_OPT_ALL_NOISE (0x1 | 0x200 | 0x2000)
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/* When "every_nth" > 0 then modulo "every_nth" commands:
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* - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
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* - a RECOVERED_ERROR is simulated on successful read and write
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* commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
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* - a TRANSPORT_ERROR is simulated on successful read and write
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* commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
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*
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* When "every_nth" < 0 then after "- every_nth" commands:
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* - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
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* - a RECOVERED_ERROR is simulated on successful read and write
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* commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
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* - a TRANSPORT_ERROR is simulated on successful read and write
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* commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
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* This will continue until some other action occurs (e.g. the user
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* writing a new value (other than -1 or 1) to every_nth via sysfs).
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*/
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/* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs)are returned in
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* priority order. In the subset implemented here lower numbers have higher
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* priority. The UA numbers should be a sequence starting from 0 with
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* SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
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#define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
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#define SDEBUG_UA_BUS_RESET 1
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#define SDEBUG_UA_MODE_CHANGED 2
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#define SDEBUG_NUM_UAS 3
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/* for check_readiness() */
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#define UAS_ONLY 1
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#define UAS_TUR 0
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/* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
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* sector on read commands: */
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#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
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#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
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/* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
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* or "peripheral device" addressing (value 0) */
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#define SAM2_LUN_ADDRESS_METHOD 0
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#define SAM2_WLUN_REPORT_LUNS 0xc101
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/* SCSI_DEBUG_CANQUEUE is the maximum number of commands that can be queued
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* (for response) at one time. Can be reduced by max_queue option. Command
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* responses are not queued when delay=0 and ndelay=0. The per-device
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* DEF_CMD_PER_LUN can be changed via sysfs:
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* /sys/class/scsi_device/<h:c:t:l>/device/queue_depth but cannot exceed
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* SCSI_DEBUG_CANQUEUE. */
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#define SCSI_DEBUG_CANQUEUE_WORDS 9 /* a WORD is bits in a long */
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#define SCSI_DEBUG_CANQUEUE (SCSI_DEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
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#define DEF_CMD_PER_LUN 255
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#if DEF_CMD_PER_LUN > SCSI_DEBUG_CANQUEUE
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#warning "Expect DEF_CMD_PER_LUN <= SCSI_DEBUG_CANQUEUE"
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#endif
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static int scsi_debug_add_host = DEF_NUM_HOST;
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static int scsi_debug_ato = DEF_ATO;
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static int scsi_debug_delay = DEF_DELAY;
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static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
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static int scsi_debug_dif = DEF_DIF;
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static int scsi_debug_dix = DEF_DIX;
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static int scsi_debug_dsense = DEF_D_SENSE;
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static int scsi_debug_every_nth = DEF_EVERY_NTH;
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static int scsi_debug_fake_rw = DEF_FAKE_RW;
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static unsigned int scsi_debug_guard = DEF_GUARD;
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static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED;
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static int scsi_debug_max_luns = DEF_MAX_LUNS;
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static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE;
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static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
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static int scsi_debug_ndelay = DEF_NDELAY;
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static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
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static int scsi_debug_no_uld = 0;
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static int scsi_debug_num_parts = DEF_NUM_PARTS;
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static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */
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static int scsi_debug_opt_blks = DEF_OPT_BLKS;
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static int scsi_debug_opts = DEF_OPTS;
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static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP;
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static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
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static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
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static int scsi_debug_sector_size = DEF_SECTOR_SIZE;
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static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
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static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
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static unsigned int scsi_debug_lbpu = DEF_LBPU;
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static unsigned int scsi_debug_lbpws = DEF_LBPWS;
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static unsigned int scsi_debug_lbpws10 = DEF_LBPWS10;
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static unsigned int scsi_debug_lbprz = DEF_LBPRZ;
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static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
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static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY;
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static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
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static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
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static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH;
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static bool scsi_debug_removable = DEF_REMOVABLE;
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static bool scsi_debug_clustering;
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static bool scsi_debug_host_lock = DEF_HOST_LOCK;
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static atomic_t sdebug_cmnd_count;
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static atomic_t sdebug_completions;
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static atomic_t sdebug_a_tsf; /* counter of 'almost' TSFs */
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#define DEV_READONLY(TGT) (0)
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static unsigned int sdebug_store_sectors;
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static sector_t sdebug_capacity; /* in sectors */
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/* old BIOS stuff, kernel may get rid of them but some mode sense pages
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may still need them */
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static int sdebug_heads; /* heads per disk */
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static int sdebug_cylinders_per; /* cylinders per surface */
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static int sdebug_sectors_per; /* sectors per cylinder */
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#define SDEBUG_MAX_PARTS 4
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#define SCSI_DEBUG_MAX_CMD_LEN 32
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static unsigned int scsi_debug_lbp(void)
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{
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return ((0 == scsi_debug_fake_rw) &&
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(scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10));
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}
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struct sdebug_dev_info {
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struct list_head dev_list;
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unsigned int channel;
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unsigned int target;
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u64 lun;
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struct sdebug_host_info *sdbg_host;
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u64 wlun;
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unsigned long uas_bm[1];
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atomic_t num_in_q;
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char stopped;
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char used;
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};
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struct sdebug_host_info {
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struct list_head host_list;
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struct Scsi_Host *shost;
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struct device dev;
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struct list_head dev_info_list;
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};
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#define to_sdebug_host(d) \
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container_of(d, struct sdebug_host_info, dev)
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static LIST_HEAD(sdebug_host_list);
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static DEFINE_SPINLOCK(sdebug_host_list_lock);
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struct sdebug_hrtimer { /* ... is derived from hrtimer */
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struct hrtimer hrt; /* must be first element */
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int qa_indx;
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};
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struct sdebug_queued_cmd {
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/* in_use flagged by a bit in queued_in_use_bm[] */
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struct timer_list *cmnd_timerp;
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struct tasklet_struct *tletp;
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struct sdebug_hrtimer *sd_hrtp;
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struct scsi_cmnd * a_cmnd;
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};
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static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
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static unsigned long queued_in_use_bm[SCSI_DEBUG_CANQUEUE_WORDS];
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static unsigned char * fake_storep; /* ramdisk storage */
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static struct sd_dif_tuple *dif_storep; /* protection info */
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static void *map_storep; /* provisioning map */
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static unsigned long map_size;
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static int num_aborts;
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static int num_dev_resets;
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static int num_target_resets;
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static int num_bus_resets;
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static int num_host_resets;
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static int dix_writes;
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static int dix_reads;
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static int dif_errors;
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static DEFINE_SPINLOCK(queued_arr_lock);
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static DEFINE_RWLOCK(atomic_rw);
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static char sdebug_proc_name[] = MY_NAME;
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static const char *my_name = MY_NAME;
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static struct bus_type pseudo_lld_bus;
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static struct device_driver sdebug_driverfs_driver = {
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.name = sdebug_proc_name,
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.bus = &pseudo_lld_bus,
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};
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static const int check_condition_result =
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(DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
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static const int illegal_condition_result =
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(DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
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static const int device_qfull_result =
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(DID_OK << 16) | (COMMAND_COMPLETE << 8) | SAM_STAT_TASK_SET_FULL;
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static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
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0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
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0, 0, 0, 0};
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static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
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0, 0, 0x2, 0x4b};
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static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
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0, 0, 0x0, 0x0};
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static void *fake_store(unsigned long long lba)
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{
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lba = do_div(lba, sdebug_store_sectors);
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return fake_storep + lba * scsi_debug_sector_size;
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}
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static struct sd_dif_tuple *dif_store(sector_t sector)
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{
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sector = do_div(sector, sdebug_store_sectors);
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return dif_storep + sector;
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}
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static int sdebug_add_adapter(void);
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static void sdebug_remove_adapter(void);
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static void sdebug_max_tgts_luns(void)
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{
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struct sdebug_host_info *sdbg_host;
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struct Scsi_Host *hpnt;
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spin_lock(&sdebug_host_list_lock);
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list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
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hpnt = sdbg_host->shost;
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if ((hpnt->this_id >= 0) &&
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(scsi_debug_num_tgts > hpnt->this_id))
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hpnt->max_id = scsi_debug_num_tgts + 1;
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else
|
|
hpnt->max_id = scsi_debug_num_tgts;
|
|
/* scsi_debug_max_luns; */
|
|
hpnt->max_lun = SAM2_WLUN_REPORT_LUNS;
|
|
}
|
|
spin_unlock(&sdebug_host_list_lock);
|
|
}
|
|
|
|
static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
|
|
{
|
|
unsigned char *sbuff;
|
|
|
|
sbuff = scp->sense_buffer;
|
|
if (!sbuff) {
|
|
sdev_printk(KERN_ERR, scp->device,
|
|
"%s: sense_buffer is NULL\n", __func__);
|
|
return;
|
|
}
|
|
memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
|
|
|
|
scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq);
|
|
|
|
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
|
|
sdev_printk(KERN_INFO, scp->device,
|
|
"%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
|
|
my_name, key, asc, asq);
|
|
}
|
|
|
|
static void get_data_transfer_info(unsigned char *cmd,
|
|
unsigned long long *lba, unsigned int *num,
|
|
u32 *ei_lba)
|
|
{
|
|
*ei_lba = 0;
|
|
|
|
switch (*cmd) {
|
|
case VARIABLE_LENGTH_CMD:
|
|
*lba = (u64)cmd[19] | (u64)cmd[18] << 8 |
|
|
(u64)cmd[17] << 16 | (u64)cmd[16] << 24 |
|
|
(u64)cmd[15] << 32 | (u64)cmd[14] << 40 |
|
|
(u64)cmd[13] << 48 | (u64)cmd[12] << 56;
|
|
|
|
*ei_lba = (u32)cmd[23] | (u32)cmd[22] << 8 |
|
|
(u32)cmd[21] << 16 | (u32)cmd[20] << 24;
|
|
|
|
*num = (u32)cmd[31] | (u32)cmd[30] << 8 | (u32)cmd[29] << 16 |
|
|
(u32)cmd[28] << 24;
|
|
break;
|
|
|
|
case WRITE_SAME_16:
|
|
case WRITE_16:
|
|
case READ_16:
|
|
*lba = (u64)cmd[9] | (u64)cmd[8] << 8 |
|
|
(u64)cmd[7] << 16 | (u64)cmd[6] << 24 |
|
|
(u64)cmd[5] << 32 | (u64)cmd[4] << 40 |
|
|
(u64)cmd[3] << 48 | (u64)cmd[2] << 56;
|
|
|
|
*num = (u32)cmd[13] | (u32)cmd[12] << 8 | (u32)cmd[11] << 16 |
|
|
(u32)cmd[10] << 24;
|
|
break;
|
|
case WRITE_12:
|
|
case READ_12:
|
|
*lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 |
|
|
(u32)cmd[2] << 24;
|
|
|
|
*num = (u32)cmd[9] | (u32)cmd[8] << 8 | (u32)cmd[7] << 16 |
|
|
(u32)cmd[6] << 24;
|
|
break;
|
|
case WRITE_SAME:
|
|
case WRITE_10:
|
|
case READ_10:
|
|
case XDWRITEREAD_10:
|
|
*lba = (u32)cmd[5] | (u32)cmd[4] << 8 | (u32)cmd[3] << 16 |
|
|
(u32)cmd[2] << 24;
|
|
|
|
*num = (u32)cmd[8] | (u32)cmd[7] << 8;
|
|
break;
|
|
case WRITE_6:
|
|
case READ_6:
|
|
*lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
|
|
(u32)(cmd[1] & 0x1f) << 16;
|
|
*num = (0 == cmd[4]) ? 256 : cmd[4];
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
|
|
{
|
|
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
|
|
if (0x1261 == cmd)
|
|
sdev_printk(KERN_INFO, dev,
|
|
"%s: BLKFLSBUF [0x1261]\n", __func__);
|
|
else if (0x5331 == cmd)
|
|
sdev_printk(KERN_INFO, dev,
|
|
"%s: CDROM_GET_CAPABILITY [0x5331]\n",
|
|
__func__);
|
|
else
|
|
sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
|
|
__func__, cmd);
|
|
}
|
|
return -EINVAL;
|
|
/* return -ENOTTY; // correct return but upsets fdisk */
|
|
}
|
|
|
|
static int check_readiness(struct scsi_cmnd *SCpnt, int uas_only,
|
|
struct sdebug_dev_info * devip)
|
|
{
|
|
int k;
|
|
bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts);
|
|
|
|
k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
|
|
if (k != SDEBUG_NUM_UAS) {
|
|
const char *cp = NULL;
|
|
|
|
switch (k) {
|
|
case SDEBUG_UA_POR:
|
|
mk_sense_buffer(SCpnt, UNIT_ATTENTION,
|
|
UA_RESET_ASC, POWER_ON_RESET_ASCQ);
|
|
if (debug)
|
|
cp = "power on reset";
|
|
break;
|
|
case SDEBUG_UA_BUS_RESET:
|
|
mk_sense_buffer(SCpnt, UNIT_ATTENTION,
|
|
UA_RESET_ASC, BUS_RESET_ASCQ);
|
|
if (debug)
|
|
cp = "bus reset";
|
|
break;
|
|
case SDEBUG_UA_MODE_CHANGED:
|
|
mk_sense_buffer(SCpnt, UNIT_ATTENTION,
|
|
UA_CHANGED_ASC, MODE_CHANGED_ASCQ);
|
|
if (debug)
|
|
cp = "mode parameters changed";
|
|
break;
|
|
default:
|
|
pr_warn("%s: unexpected unit attention code=%d\n",
|
|
__func__, k);
|
|
if (debug)
|
|
cp = "unknown";
|
|
break;
|
|
}
|
|
clear_bit(k, devip->uas_bm);
|
|
if (debug)
|
|
sdev_printk(KERN_INFO, SCpnt->device,
|
|
"%s reports: Unit attention: %s\n",
|
|
my_name, cp);
|
|
return check_condition_result;
|
|
}
|
|
if ((UAS_TUR == uas_only) && devip->stopped) {
|
|
mk_sense_buffer(SCpnt, NOT_READY, LOGICAL_UNIT_NOT_READY,
|
|
0x2);
|
|
if (debug)
|
|
sdev_printk(KERN_INFO, SCpnt->device,
|
|
"%s reports: Not ready: %s\n", my_name,
|
|
"initializing command required");
|
|
return check_condition_result;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */
|
|
static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
|
|
int arr_len)
|
|
{
|
|
int act_len;
|
|
struct scsi_data_buffer *sdb = scsi_in(scp);
|
|
|
|
if (!sdb->length)
|
|
return 0;
|
|
if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
|
|
return (DID_ERROR << 16);
|
|
|
|
act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
|
|
arr, arr_len);
|
|
sdb->resid = scsi_bufflen(scp) - act_len;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Returns number of bytes fetched into 'arr' or -1 if error. */
|
|
static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
|
|
int arr_len)
|
|
{
|
|
if (!scsi_bufflen(scp))
|
|
return 0;
|
|
if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
|
|
return -1;
|
|
|
|
return scsi_sg_copy_to_buffer(scp, arr, arr_len);
|
|
}
|
|
|
|
|
|
static const char * inq_vendor_id = "Linux ";
|
|
static const char * inq_product_id = "scsi_debug ";
|
|
static const char *inq_product_rev = "0184"; /* version less '.' */
|
|
|
|
/* Device identification VPD page. Returns number of bytes placed in arr */
|
|
static int inquiry_evpd_83(unsigned char * arr, int port_group_id,
|
|
int target_dev_id, int dev_id_num,
|
|
const char * dev_id_str,
|
|
int dev_id_str_len)
|
|
{
|
|
int num, port_a;
|
|
char b[32];
|
|
|
|
port_a = target_dev_id + 1;
|
|
/* T10 vendor identifier field format (faked) */
|
|
arr[0] = 0x2; /* ASCII */
|
|
arr[1] = 0x1;
|
|
arr[2] = 0x0;
|
|
memcpy(&arr[4], inq_vendor_id, 8);
|
|
memcpy(&arr[12], inq_product_id, 16);
|
|
memcpy(&arr[28], dev_id_str, dev_id_str_len);
|
|
num = 8 + 16 + dev_id_str_len;
|
|
arr[3] = num;
|
|
num += 4;
|
|
if (dev_id_num >= 0) {
|
|
/* NAA-5, Logical unit identifier (binary) */
|
|
arr[num++] = 0x1; /* binary (not necessarily sas) */
|
|
arr[num++] = 0x3; /* PIV=0, lu, naa */
|
|
arr[num++] = 0x0;
|
|
arr[num++] = 0x8;
|
|
arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */
|
|
arr[num++] = 0x33;
|
|
arr[num++] = 0x33;
|
|
arr[num++] = 0x30;
|
|
arr[num++] = (dev_id_num >> 24);
|
|
arr[num++] = (dev_id_num >> 16) & 0xff;
|
|
arr[num++] = (dev_id_num >> 8) & 0xff;
|
|
arr[num++] = dev_id_num & 0xff;
|
|
/* Target relative port number */
|
|
arr[num++] = 0x61; /* proto=sas, binary */
|
|
arr[num++] = 0x94; /* PIV=1, target port, rel port */
|
|
arr[num++] = 0x0; /* reserved */
|
|
arr[num++] = 0x4; /* length */
|
|
arr[num++] = 0x0; /* reserved */
|
|
arr[num++] = 0x0; /* reserved */
|
|
arr[num++] = 0x0;
|
|
arr[num++] = 0x1; /* relative port A */
|
|
}
|
|
/* NAA-5, Target port identifier */
|
|
arr[num++] = 0x61; /* proto=sas, binary */
|
|
arr[num++] = 0x93; /* piv=1, target port, naa */
|
|
arr[num++] = 0x0;
|
|
arr[num++] = 0x8;
|
|
arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
|
|
arr[num++] = 0x22;
|
|
arr[num++] = 0x22;
|
|
arr[num++] = 0x20;
|
|
arr[num++] = (port_a >> 24);
|
|
arr[num++] = (port_a >> 16) & 0xff;
|
|
arr[num++] = (port_a >> 8) & 0xff;
|
|
arr[num++] = port_a & 0xff;
|
|
/* NAA-5, Target port group identifier */
|
|
arr[num++] = 0x61; /* proto=sas, binary */
|
|
arr[num++] = 0x95; /* piv=1, target port group id */
|
|
arr[num++] = 0x0;
|
|
arr[num++] = 0x4;
|
|
arr[num++] = 0;
|
|
arr[num++] = 0;
|
|
arr[num++] = (port_group_id >> 8) & 0xff;
|
|
arr[num++] = port_group_id & 0xff;
|
|
/* NAA-5, Target device identifier */
|
|
arr[num++] = 0x61; /* proto=sas, binary */
|
|
arr[num++] = 0xa3; /* piv=1, target device, naa */
|
|
arr[num++] = 0x0;
|
|
arr[num++] = 0x8;
|
|
arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
|
|
arr[num++] = 0x22;
|
|
arr[num++] = 0x22;
|
|
arr[num++] = 0x20;
|
|
arr[num++] = (target_dev_id >> 24);
|
|
arr[num++] = (target_dev_id >> 16) & 0xff;
|
|
arr[num++] = (target_dev_id >> 8) & 0xff;
|
|
arr[num++] = target_dev_id & 0xff;
|
|
/* SCSI name string: Target device identifier */
|
|
arr[num++] = 0x63; /* proto=sas, UTF-8 */
|
|
arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
|
|
arr[num++] = 0x0;
|
|
arr[num++] = 24;
|
|
memcpy(arr + num, "naa.52222220", 12);
|
|
num += 12;
|
|
snprintf(b, sizeof(b), "%08X", target_dev_id);
|
|
memcpy(arr + num, b, 8);
|
|
num += 8;
|
|
memset(arr + num, 0, 4);
|
|
num += 4;
|
|
return num;
|
|
}
|
|
|
|
|
|
static unsigned char vpd84_data[] = {
|
|
/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
|
|
0x22,0x22,0x22,0x0,0xbb,0x1,
|
|
0x22,0x22,0x22,0x0,0xbb,0x2,
|
|
};
|
|
|
|
/* Software interface identification VPD page */
|
|
static int inquiry_evpd_84(unsigned char * arr)
|
|
{
|
|
memcpy(arr, vpd84_data, sizeof(vpd84_data));
|
|
return sizeof(vpd84_data);
|
|
}
|
|
|
|
/* Management network addresses VPD page */
|
|
static int inquiry_evpd_85(unsigned char * arr)
|
|
{
|
|
int num = 0;
|
|
const char * na1 = "https://www.kernel.org/config";
|
|
const char * na2 = "http://www.kernel.org/log";
|
|
int plen, olen;
|
|
|
|
arr[num++] = 0x1; /* lu, storage config */
|
|
arr[num++] = 0x0; /* reserved */
|
|
arr[num++] = 0x0;
|
|
olen = strlen(na1);
|
|
plen = olen + 1;
|
|
if (plen % 4)
|
|
plen = ((plen / 4) + 1) * 4;
|
|
arr[num++] = plen; /* length, null termianted, padded */
|
|
memcpy(arr + num, na1, olen);
|
|
memset(arr + num + olen, 0, plen - olen);
|
|
num += plen;
|
|
|
|
arr[num++] = 0x4; /* lu, logging */
|
|
arr[num++] = 0x0; /* reserved */
|
|
arr[num++] = 0x0;
|
|
olen = strlen(na2);
|
|
plen = olen + 1;
|
|
if (plen % 4)
|
|
plen = ((plen / 4) + 1) * 4;
|
|
arr[num++] = plen; /* length, null terminated, padded */
|
|
memcpy(arr + num, na2, olen);
|
|
memset(arr + num + olen, 0, plen - olen);
|
|
num += plen;
|
|
|
|
return num;
|
|
}
|
|
|
|
/* SCSI ports VPD page */
|
|
static int inquiry_evpd_88(unsigned char * arr, int target_dev_id)
|
|
{
|
|
int num = 0;
|
|
int port_a, port_b;
|
|
|
|
port_a = target_dev_id + 1;
|
|
port_b = port_a + 1;
|
|
arr[num++] = 0x0; /* reserved */
|
|
arr[num++] = 0x0; /* reserved */
|
|
arr[num++] = 0x0;
|
|
arr[num++] = 0x1; /* relative port 1 (primary) */
|
|
memset(arr + num, 0, 6);
|
|
num += 6;
|
|
arr[num++] = 0x0;
|
|
arr[num++] = 12; /* length tp descriptor */
|
|
/* naa-5 target port identifier (A) */
|
|
arr[num++] = 0x61; /* proto=sas, binary */
|
|
arr[num++] = 0x93; /* PIV=1, target port, NAA */
|
|
arr[num++] = 0x0; /* reserved */
|
|
arr[num++] = 0x8; /* length */
|
|
arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
|
|
arr[num++] = 0x22;
|
|
arr[num++] = 0x22;
|
|
arr[num++] = 0x20;
|
|
arr[num++] = (port_a >> 24);
|
|
arr[num++] = (port_a >> 16) & 0xff;
|
|
arr[num++] = (port_a >> 8) & 0xff;
|
|
arr[num++] = port_a & 0xff;
|
|
|
|
arr[num++] = 0x0; /* reserved */
|
|
arr[num++] = 0x0; /* reserved */
|
|
arr[num++] = 0x0;
|
|
arr[num++] = 0x2; /* relative port 2 (secondary) */
|
|
memset(arr + num, 0, 6);
|
|
num += 6;
|
|
arr[num++] = 0x0;
|
|
arr[num++] = 12; /* length tp descriptor */
|
|
/* naa-5 target port identifier (B) */
|
|
arr[num++] = 0x61; /* proto=sas, binary */
|
|
arr[num++] = 0x93; /* PIV=1, target port, NAA */
|
|
arr[num++] = 0x0; /* reserved */
|
|
arr[num++] = 0x8; /* length */
|
|
arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
|
|
arr[num++] = 0x22;
|
|
arr[num++] = 0x22;
|
|
arr[num++] = 0x20;
|
|
arr[num++] = (port_b >> 24);
|
|
arr[num++] = (port_b >> 16) & 0xff;
|
|
arr[num++] = (port_b >> 8) & 0xff;
|
|
arr[num++] = port_b & 0xff;
|
|
|
|
return num;
|
|
}
|
|
|
|
|
|
static unsigned char vpd89_data[] = {
|
|
/* from 4th byte */ 0,0,0,0,
|
|
'l','i','n','u','x',' ',' ',' ',
|
|
'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
|
|
'1','2','3','4',
|
|
0x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
|
|
0xec,0,0,0,
|
|
0x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
|
|
0,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
|
|
0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
|
|
0x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
|
|
0x53,0x41,
|
|
0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
|
|
0x20,0x20,
|
|
0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
|
|
0x10,0x80,
|
|
0,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
|
|
0x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
|
|
0x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
|
|
0x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
|
|
0x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
|
|
0,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
|
|
0,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
|
|
0xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
|
|
0,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
|
|
};
|
|
|
|
/* ATA Information VPD page */
|
|
static int inquiry_evpd_89(unsigned char * arr)
|
|
{
|
|
memcpy(arr, vpd89_data, sizeof(vpd89_data));
|
|
return sizeof(vpd89_data);
|
|
}
|
|
|
|
|
|
static unsigned char vpdb0_data[] = {
|
|
/* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
};
|
|
|
|
/* Block limits VPD page (SBC-3) */
|
|
static int inquiry_evpd_b0(unsigned char * arr)
|
|
{
|
|
unsigned int gran;
|
|
|
|
memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
|
|
|
|
/* Optimal transfer length granularity */
|
|
gran = 1 << scsi_debug_physblk_exp;
|
|
arr[2] = (gran >> 8) & 0xff;
|
|
arr[3] = gran & 0xff;
|
|
|
|
/* Maximum Transfer Length */
|
|
if (sdebug_store_sectors > 0x400) {
|
|
arr[4] = (sdebug_store_sectors >> 24) & 0xff;
|
|
arr[5] = (sdebug_store_sectors >> 16) & 0xff;
|
|
arr[6] = (sdebug_store_sectors >> 8) & 0xff;
|
|
arr[7] = sdebug_store_sectors & 0xff;
|
|
}
|
|
|
|
/* Optimal Transfer Length */
|
|
put_unaligned_be32(scsi_debug_opt_blks, &arr[8]);
|
|
|
|
if (scsi_debug_lbpu) {
|
|
/* Maximum Unmap LBA Count */
|
|
put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]);
|
|
|
|
/* Maximum Unmap Block Descriptor Count */
|
|
put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]);
|
|
}
|
|
|
|
/* Unmap Granularity Alignment */
|
|
if (scsi_debug_unmap_alignment) {
|
|
put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]);
|
|
arr[28] |= 0x80; /* UGAVALID */
|
|
}
|
|
|
|
/* Optimal Unmap Granularity */
|
|
put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]);
|
|
|
|
/* Maximum WRITE SAME Length */
|
|
put_unaligned_be64(scsi_debug_write_same_length, &arr[32]);
|
|
|
|
return 0x3c; /* Mandatory page length for Logical Block Provisioning */
|
|
|
|
return sizeof(vpdb0_data);
|
|
}
|
|
|
|
/* Block device characteristics VPD page (SBC-3) */
|
|
static int inquiry_evpd_b1(unsigned char *arr)
|
|
{
|
|
memset(arr, 0, 0x3c);
|
|
arr[0] = 0;
|
|
arr[1] = 1; /* non rotating medium (e.g. solid state) */
|
|
arr[2] = 0;
|
|
arr[3] = 5; /* less than 1.8" */
|
|
|
|
return 0x3c;
|
|
}
|
|
|
|
/* Logical block provisioning VPD page (SBC-3) */
|
|
static int inquiry_evpd_b2(unsigned char *arr)
|
|
{
|
|
memset(arr, 0, 0x4);
|
|
arr[0] = 0; /* threshold exponent */
|
|
|
|
if (scsi_debug_lbpu)
|
|
arr[1] = 1 << 7;
|
|
|
|
if (scsi_debug_lbpws)
|
|
arr[1] |= 1 << 6;
|
|
|
|
if (scsi_debug_lbpws10)
|
|
arr[1] |= 1 << 5;
|
|
|
|
if (scsi_debug_lbprz)
|
|
arr[1] |= 1 << 2;
|
|
|
|
return 0x4;
|
|
}
|
|
|
|
#define SDEBUG_LONG_INQ_SZ 96
|
|
#define SDEBUG_MAX_INQ_ARR_SZ 584
|
|
|
|
static int resp_inquiry(struct scsi_cmnd *scp, int target,
|
|
struct sdebug_dev_info * devip)
|
|
{
|
|
unsigned char pq_pdt;
|
|
unsigned char * arr;
|
|
unsigned char *cmd = (unsigned char *)scp->cmnd;
|
|
int alloc_len, n, ret;
|
|
|
|
alloc_len = (cmd[3] << 8) + cmd[4];
|
|
arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
|
|
if (! arr)
|
|
return DID_REQUEUE << 16;
|
|
if (devip->wlun)
|
|
pq_pdt = 0x1e; /* present, wlun */
|
|
else if (scsi_debug_no_lun_0 && (0 == devip->lun))
|
|
pq_pdt = 0x7f; /* not present, no device type */
|
|
else
|
|
pq_pdt = (scsi_debug_ptype & 0x1f);
|
|
arr[0] = pq_pdt;
|
|
if (0x2 & cmd[1]) { /* CMDDT bit set */
|
|
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
|
|
0);
|
|
kfree(arr);
|
|
return check_condition_result;
|
|
} else if (0x1 & cmd[1]) { /* EVPD bit set */
|
|
int lu_id_num, port_group_id, target_dev_id, len;
|
|
char lu_id_str[6];
|
|
int host_no = devip->sdbg_host->shost->host_no;
|
|
|
|
port_group_id = (((host_no + 1) & 0x7f) << 8) +
|
|
(devip->channel & 0x7f);
|
|
if (0 == scsi_debug_vpd_use_hostno)
|
|
host_no = 0;
|
|
lu_id_num = devip->wlun ? -1 : (((host_no + 1) * 2000) +
|
|
(devip->target * 1000) + devip->lun);
|
|
target_dev_id = ((host_no + 1) * 2000) +
|
|
(devip->target * 1000) - 3;
|
|
len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
|
|
if (0 == cmd[2]) { /* supported vital product data pages */
|
|
arr[1] = cmd[2]; /*sanity */
|
|
n = 4;
|
|
arr[n++] = 0x0; /* this page */
|
|
arr[n++] = 0x80; /* unit serial number */
|
|
arr[n++] = 0x83; /* device identification */
|
|
arr[n++] = 0x84; /* software interface ident. */
|
|
arr[n++] = 0x85; /* management network addresses */
|
|
arr[n++] = 0x86; /* extended inquiry */
|
|
arr[n++] = 0x87; /* mode page policy */
|
|
arr[n++] = 0x88; /* SCSI ports */
|
|
arr[n++] = 0x89; /* ATA information */
|
|
arr[n++] = 0xb0; /* Block limits (SBC) */
|
|
arr[n++] = 0xb1; /* Block characteristics (SBC) */
|
|
if (scsi_debug_lbp()) /* Logical Block Prov. (SBC) */
|
|
arr[n++] = 0xb2;
|
|
arr[3] = n - 4; /* number of supported VPD pages */
|
|
} else if (0x80 == cmd[2]) { /* unit serial number */
|
|
arr[1] = cmd[2]; /*sanity */
|
|
arr[3] = len;
|
|
memcpy(&arr[4], lu_id_str, len);
|
|
} else if (0x83 == cmd[2]) { /* device identification */
|
|
arr[1] = cmd[2]; /*sanity */
|
|
arr[3] = inquiry_evpd_83(&arr[4], port_group_id,
|
|
target_dev_id, lu_id_num,
|
|
lu_id_str, len);
|
|
} else if (0x84 == cmd[2]) { /* Software interface ident. */
|
|
arr[1] = cmd[2]; /*sanity */
|
|
arr[3] = inquiry_evpd_84(&arr[4]);
|
|
} else if (0x85 == cmd[2]) { /* Management network addresses */
|
|
arr[1] = cmd[2]; /*sanity */
|
|
arr[3] = inquiry_evpd_85(&arr[4]);
|
|
} else if (0x86 == cmd[2]) { /* extended inquiry */
|
|
arr[1] = cmd[2]; /*sanity */
|
|
arr[3] = 0x3c; /* number of following entries */
|
|
if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION)
|
|
arr[4] = 0x4; /* SPT: GRD_CHK:1 */
|
|
else if (scsi_debug_dif)
|
|
arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
|
|
else
|
|
arr[4] = 0x0; /* no protection stuff */
|
|
arr[5] = 0x7; /* head of q, ordered + simple q's */
|
|
} else if (0x87 == cmd[2]) { /* mode page policy */
|
|
arr[1] = cmd[2]; /*sanity */
|
|
arr[3] = 0x8; /* number of following entries */
|
|
arr[4] = 0x2; /* disconnect-reconnect mp */
|
|
arr[6] = 0x80; /* mlus, shared */
|
|
arr[8] = 0x18; /* protocol specific lu */
|
|
arr[10] = 0x82; /* mlus, per initiator port */
|
|
} else if (0x88 == cmd[2]) { /* SCSI Ports */
|
|
arr[1] = cmd[2]; /*sanity */
|
|
arr[3] = inquiry_evpd_88(&arr[4], target_dev_id);
|
|
} else if (0x89 == cmd[2]) { /* ATA information */
|
|
arr[1] = cmd[2]; /*sanity */
|
|
n = inquiry_evpd_89(&arr[4]);
|
|
arr[2] = (n >> 8);
|
|
arr[3] = (n & 0xff);
|
|
} else if (0xb0 == cmd[2]) { /* Block limits (SBC) */
|
|
arr[1] = cmd[2]; /*sanity */
|
|
arr[3] = inquiry_evpd_b0(&arr[4]);
|
|
} else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */
|
|
arr[1] = cmd[2]; /*sanity */
|
|
arr[3] = inquiry_evpd_b1(&arr[4]);
|
|
} else if (0xb2 == cmd[2]) { /* Logical Block Prov. (SBC) */
|
|
arr[1] = cmd[2]; /*sanity */
|
|
arr[3] = inquiry_evpd_b2(&arr[4]);
|
|
} else {
|
|
/* Illegal request, invalid field in cdb */
|
|
mk_sense_buffer(scp, ILLEGAL_REQUEST,
|
|
INVALID_FIELD_IN_CDB, 0);
|
|
kfree(arr);
|
|
return check_condition_result;
|
|
}
|
|
len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
|
|
ret = fill_from_dev_buffer(scp, arr,
|
|
min(len, SDEBUG_MAX_INQ_ARR_SZ));
|
|
kfree(arr);
|
|
return ret;
|
|
}
|
|
/* drops through here for a standard inquiry */
|
|
arr[1] = scsi_debug_removable ? 0x80 : 0; /* Removable disk */
|
|
arr[2] = scsi_debug_scsi_level;
|
|
arr[3] = 2; /* response_data_format==2 */
|
|
arr[4] = SDEBUG_LONG_INQ_SZ - 5;
|
|
arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */
|
|
if (0 == scsi_debug_vpd_use_hostno)
|
|
arr[5] = 0x10; /* claim: implicit TGPS */
|
|
arr[6] = 0x10; /* claim: MultiP */
|
|
/* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
|
|
arr[7] = 0xa; /* claim: LINKED + CMDQUE */
|
|
memcpy(&arr[8], inq_vendor_id, 8);
|
|
memcpy(&arr[16], inq_product_id, 16);
|
|
memcpy(&arr[32], inq_product_rev, 4);
|
|
/* version descriptors (2 bytes each) follow */
|
|
arr[58] = 0x0; arr[59] = 0x77; /* SAM-3 ANSI */
|
|
arr[60] = 0x3; arr[61] = 0x14; /* SPC-3 ANSI */
|
|
n = 62;
|
|
if (scsi_debug_ptype == 0) {
|
|
arr[n++] = 0x3; arr[n++] = 0x3d; /* SBC-2 ANSI */
|
|
} else if (scsi_debug_ptype == 1) {
|
|
arr[n++] = 0x3; arr[n++] = 0x60; /* SSC-2 no version */
|
|
}
|
|
arr[n++] = 0xc; arr[n++] = 0xf; /* SAS-1.1 rev 10 */
|
|
ret = fill_from_dev_buffer(scp, arr,
|
|
min(alloc_len, SDEBUG_LONG_INQ_SZ));
|
|
kfree(arr);
|
|
return ret;
|
|
}
|
|
|
|
static int resp_requests(struct scsi_cmnd * scp,
|
|
struct sdebug_dev_info * devip)
|
|
{
|
|
unsigned char * sbuff;
|
|
unsigned char *cmd = (unsigned char *)scp->cmnd;
|
|
unsigned char arr[SCSI_SENSE_BUFFERSIZE];
|
|
int want_dsense;
|
|
int len = 18;
|
|
|
|
memset(arr, 0, sizeof(arr));
|
|
want_dsense = !!(cmd[1] & 1) || scsi_debug_dsense;
|
|
sbuff = scp->sense_buffer;
|
|
if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
|
|
if (want_dsense) {
|
|
arr[0] = 0x72;
|
|
arr[1] = 0x0; /* NO_SENSE in sense_key */
|
|
arr[2] = THRESHOLD_EXCEEDED;
|
|
arr[3] = 0xff; /* TEST set and MRIE==6 */
|
|
} else {
|
|
arr[0] = 0x70;
|
|
arr[2] = 0x0; /* NO_SENSE in sense_key */
|
|
arr[7] = 0xa; /* 18 byte sense buffer */
|
|
arr[12] = THRESHOLD_EXCEEDED;
|
|
arr[13] = 0xff; /* TEST set and MRIE==6 */
|
|
}
|
|
} else {
|
|
memcpy(arr, sbuff, SCSI_SENSE_BUFFERSIZE);
|
|
if ((cmd[1] & 1) && (! scsi_debug_dsense)) {
|
|
/* DESC bit set and sense_buff in fixed format */
|
|
memset(arr, 0, sizeof(arr));
|
|
arr[0] = 0x72;
|
|
arr[1] = sbuff[2]; /* sense key */
|
|
arr[2] = sbuff[12]; /* asc */
|
|
arr[3] = sbuff[13]; /* ascq */
|
|
len = 8;
|
|
}
|
|
}
|
|
mk_sense_buffer(scp, 0, NO_ADDITIONAL_SENSE, 0);
|
|
return fill_from_dev_buffer(scp, arr, len);
|
|
}
|
|
|
|
static int resp_start_stop(struct scsi_cmnd * scp,
|
|
struct sdebug_dev_info * devip)
|
|
{
|
|
unsigned char *cmd = (unsigned char *)scp->cmnd;
|
|
int power_cond, errsts, start;
|
|
|
|
errsts = check_readiness(scp, UAS_ONLY, devip);
|
|
if (errsts)
|
|
return errsts;
|
|
power_cond = (cmd[4] & 0xf0) >> 4;
|
|
if (power_cond) {
|
|
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
|
|
0);
|
|
return check_condition_result;
|
|
}
|
|
start = cmd[4] & 1;
|
|
if (start == devip->stopped)
|
|
devip->stopped = !start;
|
|
return 0;
|
|
}
|
|
|
|
static sector_t get_sdebug_capacity(void)
|
|
{
|
|
if (scsi_debug_virtual_gb > 0)
|
|
return (sector_t)scsi_debug_virtual_gb *
|
|
(1073741824 / scsi_debug_sector_size);
|
|
else
|
|
return sdebug_store_sectors;
|
|
}
|
|
|
|
#define SDEBUG_READCAP_ARR_SZ 8
|
|
static int resp_readcap(struct scsi_cmnd * scp,
|
|
struct sdebug_dev_info * devip)
|
|
{
|
|
unsigned char arr[SDEBUG_READCAP_ARR_SZ];
|
|
unsigned int capac;
|
|
int errsts;
|
|
|
|
errsts = check_readiness(scp, UAS_ONLY, devip);
|
|
if (errsts)
|
|
return errsts;
|
|
/* following just in case virtual_gb changed */
|
|
sdebug_capacity = get_sdebug_capacity();
|
|
memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
|
|
if (sdebug_capacity < 0xffffffff) {
|
|
capac = (unsigned int)sdebug_capacity - 1;
|
|
arr[0] = (capac >> 24);
|
|
arr[1] = (capac >> 16) & 0xff;
|
|
arr[2] = (capac >> 8) & 0xff;
|
|
arr[3] = capac & 0xff;
|
|
} else {
|
|
arr[0] = 0xff;
|
|
arr[1] = 0xff;
|
|
arr[2] = 0xff;
|
|
arr[3] = 0xff;
|
|
}
|
|
arr[6] = (scsi_debug_sector_size >> 8) & 0xff;
|
|
arr[7] = scsi_debug_sector_size & 0xff;
|
|
return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
|
|
}
|
|
|
|
#define SDEBUG_READCAP16_ARR_SZ 32
|
|
static int resp_readcap16(struct scsi_cmnd * scp,
|
|
struct sdebug_dev_info * devip)
|
|
{
|
|
unsigned char *cmd = (unsigned char *)scp->cmnd;
|
|
unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
|
|
unsigned long long capac;
|
|
int errsts, k, alloc_len;
|
|
|
|
errsts = check_readiness(scp, UAS_ONLY, devip);
|
|
if (errsts)
|
|
return errsts;
|
|
alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8)
|
|
+ cmd[13]);
|
|
/* following just in case virtual_gb changed */
|
|
sdebug_capacity = get_sdebug_capacity();
|
|
memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
|
|
capac = sdebug_capacity - 1;
|
|
for (k = 0; k < 8; ++k, capac >>= 8)
|
|
arr[7 - k] = capac & 0xff;
|
|
arr[8] = (scsi_debug_sector_size >> 24) & 0xff;
|
|
arr[9] = (scsi_debug_sector_size >> 16) & 0xff;
|
|
arr[10] = (scsi_debug_sector_size >> 8) & 0xff;
|
|
arr[11] = scsi_debug_sector_size & 0xff;
|
|
arr[13] = scsi_debug_physblk_exp & 0xf;
|
|
arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f;
|
|
|
|
if (scsi_debug_lbp()) {
|
|
arr[14] |= 0x80; /* LBPME */
|
|
if (scsi_debug_lbprz)
|
|
arr[14] |= 0x40; /* LBPRZ */
|
|
}
|
|
|
|
arr[15] = scsi_debug_lowest_aligned & 0xff;
|
|
|
|
if (scsi_debug_dif) {
|
|
arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */
|
|
arr[12] |= 1; /* PROT_EN */
|
|
}
|
|
|
|
return fill_from_dev_buffer(scp, arr,
|
|
min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
|
|
}
|
|
|
|
#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
|
|
|
|
static int resp_report_tgtpgs(struct scsi_cmnd * scp,
|
|
struct sdebug_dev_info * devip)
|
|
{
|
|
unsigned char *cmd = (unsigned char *)scp->cmnd;
|
|
unsigned char * arr;
|
|
int host_no = devip->sdbg_host->shost->host_no;
|
|
int n, ret, alen, rlen;
|
|
int port_group_a, port_group_b, port_a, port_b;
|
|
|
|
alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8)
|
|
+ cmd[9]);
|
|
|
|
arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
|
|
if (! arr)
|
|
return DID_REQUEUE << 16;
|
|
/*
|
|
* EVPD page 0x88 states we have two ports, one
|
|
* real and a fake port with no device connected.
|
|
* So we create two port groups with one port each
|
|
* and set the group with port B to unavailable.
|
|
*/
|
|
port_a = 0x1; /* relative port A */
|
|
port_b = 0x2; /* relative port B */
|
|
port_group_a = (((host_no + 1) & 0x7f) << 8) +
|
|
(devip->channel & 0x7f);
|
|
port_group_b = (((host_no + 1) & 0x7f) << 8) +
|
|
(devip->channel & 0x7f) + 0x80;
|
|
|
|
/*
|
|
* The asymmetric access state is cycled according to the host_id.
|
|
*/
|
|
n = 4;
|
|
if (0 == scsi_debug_vpd_use_hostno) {
|
|
arr[n++] = host_no % 3; /* Asymm access state */
|
|
arr[n++] = 0x0F; /* claim: all states are supported */
|
|
} else {
|
|
arr[n++] = 0x0; /* Active/Optimized path */
|
|
arr[n++] = 0x01; /* claim: only support active/optimized paths */
|
|
}
|
|
arr[n++] = (port_group_a >> 8) & 0xff;
|
|
arr[n++] = port_group_a & 0xff;
|
|
arr[n++] = 0; /* Reserved */
|
|
arr[n++] = 0; /* Status code */
|
|
arr[n++] = 0; /* Vendor unique */
|
|
arr[n++] = 0x1; /* One port per group */
|
|
arr[n++] = 0; /* Reserved */
|
|
arr[n++] = 0; /* Reserved */
|
|
arr[n++] = (port_a >> 8) & 0xff;
|
|
arr[n++] = port_a & 0xff;
|
|
arr[n++] = 3; /* Port unavailable */
|
|
arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
|
|
arr[n++] = (port_group_b >> 8) & 0xff;
|
|
arr[n++] = port_group_b & 0xff;
|
|
arr[n++] = 0; /* Reserved */
|
|
arr[n++] = 0; /* Status code */
|
|
arr[n++] = 0; /* Vendor unique */
|
|
arr[n++] = 0x1; /* One port per group */
|
|
arr[n++] = 0; /* Reserved */
|
|
arr[n++] = 0; /* Reserved */
|
|
arr[n++] = (port_b >> 8) & 0xff;
|
|
arr[n++] = port_b & 0xff;
|
|
|
|
rlen = n - 4;
|
|
arr[0] = (rlen >> 24) & 0xff;
|
|
arr[1] = (rlen >> 16) & 0xff;
|
|
arr[2] = (rlen >> 8) & 0xff;
|
|
arr[3] = rlen & 0xff;
|
|
|
|
/*
|
|
* Return the smallest value of either
|
|
* - The allocated length
|
|
* - The constructed command length
|
|
* - The maximum array size
|
|
*/
|
|
rlen = min(alen,n);
|
|
ret = fill_from_dev_buffer(scp, arr,
|
|
min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
|
|
kfree(arr);
|
|
return ret;
|
|
}
|
|
|
|
/* <<Following mode page info copied from ST318451LW>> */
|
|
|
|
static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target)
|
|
{ /* Read-Write Error Recovery page for mode_sense */
|
|
unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
|
|
5, 0, 0xff, 0xff};
|
|
|
|
memcpy(p, err_recov_pg, sizeof(err_recov_pg));
|
|
if (1 == pcontrol)
|
|
memset(p + 2, 0, sizeof(err_recov_pg) - 2);
|
|
return sizeof(err_recov_pg);
|
|
}
|
|
|
|
static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
|
|
{ /* Disconnect-Reconnect page for mode_sense */
|
|
unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0};
|
|
|
|
memcpy(p, disconnect_pg, sizeof(disconnect_pg));
|
|
if (1 == pcontrol)
|
|
memset(p + 2, 0, sizeof(disconnect_pg) - 2);
|
|
return sizeof(disconnect_pg);
|
|
}
|
|
|
|
static int resp_format_pg(unsigned char * p, int pcontrol, int target)
|
|
{ /* Format device page for mode_sense */
|
|
unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0x40, 0, 0, 0};
|
|
|
|
memcpy(p, format_pg, sizeof(format_pg));
|
|
p[10] = (sdebug_sectors_per >> 8) & 0xff;
|
|
p[11] = sdebug_sectors_per & 0xff;
|
|
p[12] = (scsi_debug_sector_size >> 8) & 0xff;
|
|
p[13] = scsi_debug_sector_size & 0xff;
|
|
if (scsi_debug_removable)
|
|
p[20] |= 0x20; /* should agree with INQUIRY */
|
|
if (1 == pcontrol)
|
|
memset(p + 2, 0, sizeof(format_pg) - 2);
|
|
return sizeof(format_pg);
|
|
}
|
|
|
|
static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
|
|
{ /* Caching page for mode_sense */
|
|
unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
|
|
unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
|
|
0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
|
|
|
|
if (SCSI_DEBUG_OPT_N_WCE & scsi_debug_opts)
|
|
caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
|
|
memcpy(p, caching_pg, sizeof(caching_pg));
|
|
if (1 == pcontrol)
|
|
memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
|
|
else if (2 == pcontrol)
|
|
memcpy(p, d_caching_pg, sizeof(d_caching_pg));
|
|
return sizeof(caching_pg);
|
|
}
|
|
|
|
static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
|
|
{ /* Control mode page for mode_sense */
|
|
unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0};
|
|
unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
|
|
0, 0, 0x2, 0x4b};
|
|
|
|
if (scsi_debug_dsense)
|
|
ctrl_m_pg[2] |= 0x4;
|
|
else
|
|
ctrl_m_pg[2] &= ~0x4;
|
|
|
|
if (scsi_debug_ato)
|
|
ctrl_m_pg[5] |= 0x80; /* ATO=1 */
|
|
|
|
memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
|
|
if (1 == pcontrol)
|
|
memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
|
|
else if (2 == pcontrol)
|
|
memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
|
|
return sizeof(ctrl_m_pg);
|
|
}
|
|
|
|
|
|
static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target)
|
|
{ /* Informational Exceptions control mode page for mode_sense */
|
|
unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
|
|
0, 0, 0x0, 0x0};
|
|
unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
|
|
0, 0, 0x0, 0x0};
|
|
|
|
memcpy(p, iec_m_pg, sizeof(iec_m_pg));
|
|
if (1 == pcontrol)
|
|
memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
|
|
else if (2 == pcontrol)
|
|
memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
|
|
return sizeof(iec_m_pg);
|
|
}
|
|
|
|
static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target)
|
|
{ /* SAS SSP mode page - short format for mode_sense */
|
|
unsigned char sas_sf_m_pg[] = {0x19, 0x6,
|
|
0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
|
|
|
|
memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
|
|
if (1 == pcontrol)
|
|
memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
|
|
return sizeof(sas_sf_m_pg);
|
|
}
|
|
|
|
|
|
static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target,
|
|
int target_dev_id)
|
|
{ /* SAS phy control and discover mode page for mode_sense */
|
|
unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
|
|
0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
|
|
0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
|
|
0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
|
|
0x2, 0, 0, 0, 0, 0, 0, 0,
|
|
0x88, 0x99, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
|
|
0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
|
|
0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
|
|
0x3, 0, 0, 0, 0, 0, 0, 0,
|
|
0x88, 0x99, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
|
};
|
|
int port_a, port_b;
|
|
|
|
port_a = target_dev_id + 1;
|
|
port_b = port_a + 1;
|
|
memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
|
|
p[20] = (port_a >> 24);
|
|
p[21] = (port_a >> 16) & 0xff;
|
|
p[22] = (port_a >> 8) & 0xff;
|
|
p[23] = port_a & 0xff;
|
|
p[48 + 20] = (port_b >> 24);
|
|
p[48 + 21] = (port_b >> 16) & 0xff;
|
|
p[48 + 22] = (port_b >> 8) & 0xff;
|
|
p[48 + 23] = port_b & 0xff;
|
|
if (1 == pcontrol)
|
|
memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
|
|
return sizeof(sas_pcd_m_pg);
|
|
}
|
|
|
|
static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
|
|
{ /* SAS SSP shared protocol specific port mode subpage */
|
|
unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
|
};
|
|
|
|
memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
|
|
if (1 == pcontrol)
|
|
memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
|
|
return sizeof(sas_sha_m_pg);
|
|
}
|
|
|
|
#define SDEBUG_MAX_MSENSE_SZ 256
|
|
|
|
static int resp_mode_sense(struct scsi_cmnd * scp, int target,
|
|
struct sdebug_dev_info * devip)
|
|
{
|
|
unsigned char dbd, llbaa;
|
|
int pcontrol, pcode, subpcode, bd_len;
|
|
unsigned char dev_spec;
|
|
int k, alloc_len, msense_6, offset, len, errsts, target_dev_id;
|
|
unsigned char * ap;
|
|
unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
|
|
unsigned char *cmd = (unsigned char *)scp->cmnd;
|
|
|
|
errsts = check_readiness(scp, UAS_ONLY, devip);
|
|
if (errsts)
|
|
return errsts;
|
|
dbd = !!(cmd[1] & 0x8);
|
|
pcontrol = (cmd[2] & 0xc0) >> 6;
|
|
pcode = cmd[2] & 0x3f;
|
|
subpcode = cmd[3];
|
|
msense_6 = (MODE_SENSE == cmd[0]);
|
|
llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10);
|
|
if ((0 == scsi_debug_ptype) && (0 == dbd))
|
|
bd_len = llbaa ? 16 : 8;
|
|
else
|
|
bd_len = 0;
|
|
alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
|
|
memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
|
|
if (0x3 == pcontrol) { /* Saving values not supported */
|
|
mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
|
|
return check_condition_result;
|
|
}
|
|
target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
|
|
(devip->target * 1000) - 3;
|
|
/* set DPOFUA bit for disks */
|
|
if (0 == scsi_debug_ptype)
|
|
dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10;
|
|
else
|
|
dev_spec = 0x0;
|
|
if (msense_6) {
|
|
arr[2] = dev_spec;
|
|
arr[3] = bd_len;
|
|
offset = 4;
|
|
} else {
|
|
arr[3] = dev_spec;
|
|
if (16 == bd_len)
|
|
arr[4] = 0x1; /* set LONGLBA bit */
|
|
arr[7] = bd_len; /* assume 255 or less */
|
|
offset = 8;
|
|
}
|
|
ap = arr + offset;
|
|
if ((bd_len > 0) && (!sdebug_capacity))
|
|
sdebug_capacity = get_sdebug_capacity();
|
|
|
|
if (8 == bd_len) {
|
|
if (sdebug_capacity > 0xfffffffe) {
|
|
ap[0] = 0xff;
|
|
ap[1] = 0xff;
|
|
ap[2] = 0xff;
|
|
ap[3] = 0xff;
|
|
} else {
|
|
ap[0] = (sdebug_capacity >> 24) & 0xff;
|
|
ap[1] = (sdebug_capacity >> 16) & 0xff;
|
|
ap[2] = (sdebug_capacity >> 8) & 0xff;
|
|
ap[3] = sdebug_capacity & 0xff;
|
|
}
|
|
ap[6] = (scsi_debug_sector_size >> 8) & 0xff;
|
|
ap[7] = scsi_debug_sector_size & 0xff;
|
|
offset += bd_len;
|
|
ap = arr + offset;
|
|
} else if (16 == bd_len) {
|
|
unsigned long long capac = sdebug_capacity;
|
|
|
|
for (k = 0; k < 8; ++k, capac >>= 8)
|
|
ap[7 - k] = capac & 0xff;
|
|
ap[12] = (scsi_debug_sector_size >> 24) & 0xff;
|
|
ap[13] = (scsi_debug_sector_size >> 16) & 0xff;
|
|
ap[14] = (scsi_debug_sector_size >> 8) & 0xff;
|
|
ap[15] = scsi_debug_sector_size & 0xff;
|
|
offset += bd_len;
|
|
ap = arr + offset;
|
|
}
|
|
|
|
if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
|
|
/* TODO: Control Extension page */
|
|
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
|
|
0);
|
|
return check_condition_result;
|
|
}
|
|
switch (pcode) {
|
|
case 0x1: /* Read-Write error recovery page, direct access */
|
|
len = resp_err_recov_pg(ap, pcontrol, target);
|
|
offset += len;
|
|
break;
|
|
case 0x2: /* Disconnect-Reconnect page, all devices */
|
|
len = resp_disconnect_pg(ap, pcontrol, target);
|
|
offset += len;
|
|
break;
|
|
case 0x3: /* Format device page, direct access */
|
|
len = resp_format_pg(ap, pcontrol, target);
|
|
offset += len;
|
|
break;
|
|
case 0x8: /* Caching page, direct access */
|
|
len = resp_caching_pg(ap, pcontrol, target);
|
|
offset += len;
|
|
break;
|
|
case 0xa: /* Control Mode page, all devices */
|
|
len = resp_ctrl_m_pg(ap, pcontrol, target);
|
|
offset += len;
|
|
break;
|
|
case 0x19: /* if spc==1 then sas phy, control+discover */
|
|
if ((subpcode > 0x2) && (subpcode < 0xff)) {
|
|
mk_sense_buffer(scp, ILLEGAL_REQUEST,
|
|
INVALID_FIELD_IN_CDB, 0);
|
|
return check_condition_result;
|
|
}
|
|
len = 0;
|
|
if ((0x0 == subpcode) || (0xff == subpcode))
|
|
len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
|
|
if ((0x1 == subpcode) || (0xff == subpcode))
|
|
len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
|
|
target_dev_id);
|
|
if ((0x2 == subpcode) || (0xff == subpcode))
|
|
len += resp_sas_sha_m_spg(ap + len, pcontrol);
|
|
offset += len;
|
|
break;
|
|
case 0x1c: /* Informational Exceptions Mode page, all devices */
|
|
len = resp_iec_m_pg(ap, pcontrol, target);
|
|
offset += len;
|
|
break;
|
|
case 0x3f: /* Read all Mode pages */
|
|
if ((0 == subpcode) || (0xff == subpcode)) {
|
|
len = resp_err_recov_pg(ap, pcontrol, target);
|
|
len += resp_disconnect_pg(ap + len, pcontrol, target);
|
|
len += resp_format_pg(ap + len, pcontrol, target);
|
|
len += resp_caching_pg(ap + len, pcontrol, target);
|
|
len += resp_ctrl_m_pg(ap + len, pcontrol, target);
|
|
len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
|
|
if (0xff == subpcode) {
|
|
len += resp_sas_pcd_m_spg(ap + len, pcontrol,
|
|
target, target_dev_id);
|
|
len += resp_sas_sha_m_spg(ap + len, pcontrol);
|
|
}
|
|
len += resp_iec_m_pg(ap + len, pcontrol, target);
|
|
} else {
|
|
mk_sense_buffer(scp, ILLEGAL_REQUEST,
|
|
INVALID_FIELD_IN_CDB, 0);
|
|
return check_condition_result;
|
|
}
|
|
offset += len;
|
|
break;
|
|
default:
|
|
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
|
|
0);
|
|
return check_condition_result;
|
|
}
|
|
if (msense_6)
|
|
arr[0] = offset - 1;
|
|
else {
|
|
arr[0] = ((offset - 2) >> 8) & 0xff;
|
|
arr[1] = (offset - 2) & 0xff;
|
|
}
|
|
return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
|
|
}
|
|
|
|
#define SDEBUG_MAX_MSELECT_SZ 512
|
|
|
|
static int resp_mode_select(struct scsi_cmnd * scp, int mselect6,
|
|
struct sdebug_dev_info * devip)
|
|
{
|
|
int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
|
|
int param_len, res, errsts, mpage;
|
|
unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
|
|
unsigned char *cmd = (unsigned char *)scp->cmnd;
|
|
|
|
errsts = check_readiness(scp, UAS_ONLY, devip);
|
|
if (errsts)
|
|
return errsts;
|
|
memset(arr, 0, sizeof(arr));
|
|
pf = cmd[1] & 0x10;
|
|
sp = cmd[1] & 0x1;
|
|
param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]);
|
|
if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
|
|
mk_sense_buffer(scp, ILLEGAL_REQUEST,
|
|
INVALID_FIELD_IN_CDB, 0);
|
|
return check_condition_result;
|
|
}
|
|
res = fetch_to_dev_buffer(scp, arr, param_len);
|
|
if (-1 == res)
|
|
return (DID_ERROR << 16);
|
|
else if ((res < param_len) &&
|
|
(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
|
|
sdev_printk(KERN_INFO, scp->device,
|
|
"%s: cdb indicated=%d, IO sent=%d bytes\n",
|
|
__func__, param_len, res);
|
|
md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2);
|
|
bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]);
|
|
if (md_len > 2) {
|
|
mk_sense_buffer(scp, ILLEGAL_REQUEST,
|
|
INVALID_FIELD_IN_PARAM_LIST, 0);
|
|
return check_condition_result;
|
|
}
|
|
off = bd_len + (mselect6 ? 4 : 8);
|
|
mpage = arr[off] & 0x3f;
|
|
ps = !!(arr[off] & 0x80);
|
|
if (ps) {
|
|
mk_sense_buffer(scp, ILLEGAL_REQUEST,
|
|
INVALID_FIELD_IN_PARAM_LIST, 0);
|
|
return check_condition_result;
|
|
}
|
|
spf = !!(arr[off] & 0x40);
|
|
pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) :
|
|
(arr[off + 1] + 2);
|
|
if ((pg_len + off) > param_len) {
|
|
mk_sense_buffer(scp, ILLEGAL_REQUEST,
|
|
PARAMETER_LIST_LENGTH_ERR, 0);
|
|
return check_condition_result;
|
|
}
|
|
switch (mpage) {
|
|
case 0x8: /* Caching Mode page */
|
|
if (caching_pg[1] == arr[off + 1]) {
|
|
memcpy(caching_pg + 2, arr + off + 2,
|
|
sizeof(caching_pg) - 2);
|
|
goto set_mode_changed_ua;
|
|
}
|
|
break;
|
|
case 0xa: /* Control Mode page */
|
|
if (ctrl_m_pg[1] == arr[off + 1]) {
|
|
memcpy(ctrl_m_pg + 2, arr + off + 2,
|
|
sizeof(ctrl_m_pg) - 2);
|
|
scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4);
|
|
goto set_mode_changed_ua;
|
|
}
|
|
break;
|
|
case 0x1c: /* Informational Exceptions Mode page */
|
|
if (iec_m_pg[1] == arr[off + 1]) {
|
|
memcpy(iec_m_pg + 2, arr + off + 2,
|
|
sizeof(iec_m_pg) - 2);
|
|
goto set_mode_changed_ua;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
mk_sense_buffer(scp, ILLEGAL_REQUEST,
|
|
INVALID_FIELD_IN_PARAM_LIST, 0);
|
|
return check_condition_result;
|
|
set_mode_changed_ua:
|
|
set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
|
|
return 0;
|
|
}
|
|
|
|
static int resp_temp_l_pg(unsigned char * arr)
|
|
{
|
|
unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
|
|
0x0, 0x1, 0x3, 0x2, 0x0, 65,
|
|
};
|
|
|
|
memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
|
|
return sizeof(temp_l_pg);
|
|
}
|
|
|
|
static int resp_ie_l_pg(unsigned char * arr)
|
|
{
|
|
unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
|
|
};
|
|
|
|
memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
|
|
if (iec_m_pg[2] & 0x4) { /* TEST bit set */
|
|
arr[4] = THRESHOLD_EXCEEDED;
|
|
arr[5] = 0xff;
|
|
}
|
|
return sizeof(ie_l_pg);
|
|
}
|
|
|
|
#define SDEBUG_MAX_LSENSE_SZ 512
|
|
|
|
static int resp_log_sense(struct scsi_cmnd * scp,
|
|
struct sdebug_dev_info * devip)
|
|
{
|
|
int ppc, sp, pcontrol, pcode, subpcode, alloc_len, errsts, len, n;
|
|
unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
|
|
unsigned char *cmd = (unsigned char *)scp->cmnd;
|
|
|
|
errsts = check_readiness(scp, UAS_ONLY, devip);
|
|
if (errsts)
|
|
return errsts;
|
|
memset(arr, 0, sizeof(arr));
|
|
ppc = cmd[1] & 0x2;
|
|
sp = cmd[1] & 0x1;
|
|
if (ppc || sp) {
|
|
mk_sense_buffer(scp, ILLEGAL_REQUEST,
|
|
INVALID_FIELD_IN_CDB, 0);
|
|
return check_condition_result;
|
|
}
|
|
pcontrol = (cmd[2] & 0xc0) >> 6;
|
|
pcode = cmd[2] & 0x3f;
|
|
subpcode = cmd[3] & 0xff;
|
|
alloc_len = (cmd[7] << 8) + cmd[8];
|
|
arr[0] = pcode;
|
|
if (0 == subpcode) {
|
|
switch (pcode) {
|
|
case 0x0: /* Supported log pages log page */
|
|
n = 4;
|
|
arr[n++] = 0x0; /* this page */
|
|
arr[n++] = 0xd; /* Temperature */
|
|
arr[n++] = 0x2f; /* Informational exceptions */
|
|
arr[3] = n - 4;
|
|
break;
|
|
case 0xd: /* Temperature log page */
|
|
arr[3] = resp_temp_l_pg(arr + 4);
|
|
break;
|
|
case 0x2f: /* Informational exceptions log page */
|
|
arr[3] = resp_ie_l_pg(arr + 4);
|
|
break;
|
|
default:
|
|
mk_sense_buffer(scp, ILLEGAL_REQUEST,
|
|
INVALID_FIELD_IN_CDB, 0);
|
|
return check_condition_result;
|
|
}
|
|
} else if (0xff == subpcode) {
|
|
arr[0] |= 0x40;
|
|
arr[1] = subpcode;
|
|
switch (pcode) {
|
|
case 0x0: /* Supported log pages and subpages log page */
|
|
n = 4;
|
|
arr[n++] = 0x0;
|
|
arr[n++] = 0x0; /* 0,0 page */
|
|
arr[n++] = 0x0;
|
|
arr[n++] = 0xff; /* this page */
|
|
arr[n++] = 0xd;
|
|
arr[n++] = 0x0; /* Temperature */
|
|
arr[n++] = 0x2f;
|
|
arr[n++] = 0x0; /* Informational exceptions */
|
|
arr[3] = n - 4;
|
|
break;
|
|
case 0xd: /* Temperature subpages */
|
|
n = 4;
|
|
arr[n++] = 0xd;
|
|
arr[n++] = 0x0; /* Temperature */
|
|
arr[3] = n - 4;
|
|
break;
|
|
case 0x2f: /* Informational exceptions subpages */
|
|
n = 4;
|
|
arr[n++] = 0x2f;
|
|
arr[n++] = 0x0; /* Informational exceptions */
|
|
arr[3] = n - 4;
|
|
break;
|
|
default:
|
|
mk_sense_buffer(scp, ILLEGAL_REQUEST,
|
|
INVALID_FIELD_IN_CDB, 0);
|
|
return check_condition_result;
|
|
}
|
|
} else {
|
|
mk_sense_buffer(scp, ILLEGAL_REQUEST,
|
|
INVALID_FIELD_IN_CDB, 0);
|
|
return check_condition_result;
|
|
}
|
|
len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
|
|
return fill_from_dev_buffer(scp, arr,
|
|
min(len, SDEBUG_MAX_INQ_ARR_SZ));
|
|
}
|
|
|
|
static int check_device_access_params(struct scsi_cmnd *scp,
|
|
unsigned long long lba, unsigned int num)
|
|
{
|
|
if (lba + num > sdebug_capacity) {
|
|
mk_sense_buffer(scp, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE, 0);
|
|
return check_condition_result;
|
|
}
|
|
/* transfer length excessive (tie in to block limits VPD page) */
|
|
if (num > sdebug_store_sectors) {
|
|
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
|
|
return check_condition_result;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Returns number of bytes copied or -1 if error. */
|
|
static int do_device_access(struct scsi_cmnd *scmd,
|
|
unsigned long long lba, unsigned int num, int write)
|
|
{
|
|
int ret;
|
|
unsigned long long block, rest = 0;
|
|
struct scsi_data_buffer *sdb;
|
|
enum dma_data_direction dir;
|
|
size_t (*func)(struct scatterlist *, unsigned int, void *, size_t,
|
|
off_t);
|
|
|
|
if (write) {
|
|
sdb = scsi_out(scmd);
|
|
dir = DMA_TO_DEVICE;
|
|
func = sg_pcopy_to_buffer;
|
|
} else {
|
|
sdb = scsi_in(scmd);
|
|
dir = DMA_FROM_DEVICE;
|
|
func = sg_pcopy_from_buffer;
|
|
}
|
|
|
|
if (!sdb->length)
|
|
return 0;
|
|
if (!(scsi_bidi_cmnd(scmd) || scmd->sc_data_direction == dir))
|
|
return -1;
|
|
|
|
block = do_div(lba, sdebug_store_sectors);
|
|
if (block + num > sdebug_store_sectors)
|
|
rest = block + num - sdebug_store_sectors;
|
|
|
|
ret = func(sdb->table.sgl, sdb->table.nents,
|
|
fake_storep + (block * scsi_debug_sector_size),
|
|
(num - rest) * scsi_debug_sector_size, 0);
|
|
if (ret != (num - rest) * scsi_debug_sector_size)
|
|
return ret;
|
|
|
|
if (rest) {
|
|
ret += func(sdb->table.sgl, sdb->table.nents,
|
|
fake_storep, rest * scsi_debug_sector_size,
|
|
(num - rest) * scsi_debug_sector_size);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static __be16 dif_compute_csum(const void *buf, int len)
|
|
{
|
|
__be16 csum;
|
|
|
|
if (scsi_debug_guard)
|
|
csum = (__force __be16)ip_compute_csum(buf, len);
|
|
else
|
|
csum = cpu_to_be16(crc_t10dif(buf, len));
|
|
|
|
return csum;
|
|
}
|
|
|
|
static int dif_verify(struct sd_dif_tuple *sdt, const void *data,
|
|
sector_t sector, u32 ei_lba)
|
|
{
|
|
__be16 csum = dif_compute_csum(data, scsi_debug_sector_size);
|
|
|
|
if (sdt->guard_tag != csum) {
|
|
pr_err("%s: GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
|
|
__func__,
|
|
(unsigned long)sector,
|
|
be16_to_cpu(sdt->guard_tag),
|
|
be16_to_cpu(csum));
|
|
return 0x01;
|
|
}
|
|
if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
|
|
be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
|
|
pr_err("%s: REF check failed on sector %lu\n",
|
|
__func__, (unsigned long)sector);
|
|
return 0x03;
|
|
}
|
|
if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
|
|
be32_to_cpu(sdt->ref_tag) != ei_lba) {
|
|
pr_err("%s: REF check failed on sector %lu\n",
|
|
__func__, (unsigned long)sector);
|
|
return 0x03;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void dif_copy_prot(struct scsi_cmnd *SCpnt, sector_t sector,
|
|
unsigned int sectors, bool read)
|
|
{
|
|
size_t resid;
|
|
void *paddr;
|
|
const void *dif_store_end = dif_storep + sdebug_store_sectors;
|
|
struct sg_mapping_iter miter;
|
|
|
|
/* Bytes of protection data to copy into sgl */
|
|
resid = sectors * sizeof(*dif_storep);
|
|
|
|
sg_miter_start(&miter, scsi_prot_sglist(SCpnt),
|
|
scsi_prot_sg_count(SCpnt), SG_MITER_ATOMIC |
|
|
(read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
|
|
|
|
while (sg_miter_next(&miter) && resid > 0) {
|
|
size_t len = min(miter.length, resid);
|
|
void *start = dif_store(sector);
|
|
size_t rest = 0;
|
|
|
|
if (dif_store_end < start + len)
|
|
rest = start + len - dif_store_end;
|
|
|
|
paddr = miter.addr;
|
|
|
|
if (read)
|
|
memcpy(paddr, start, len - rest);
|
|
else
|
|
memcpy(start, paddr, len - rest);
|
|
|
|
if (rest) {
|
|
if (read)
|
|
memcpy(paddr + len - rest, dif_storep, rest);
|
|
else
|
|
memcpy(dif_storep, paddr + len - rest, rest);
|
|
}
|
|
|
|
sector += len / sizeof(*dif_storep);
|
|
resid -= len;
|
|
}
|
|
sg_miter_stop(&miter);
|
|
}
|
|
|
|
static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
|
|
unsigned int sectors, u32 ei_lba)
|
|
{
|
|
unsigned int i;
|
|
struct sd_dif_tuple *sdt;
|
|
sector_t sector;
|
|
|
|
for (i = 0; i < sectors; i++, ei_lba++) {
|
|
int ret;
|
|
|
|
sector = start_sec + i;
|
|
sdt = dif_store(sector);
|
|
|
|
if (sdt->app_tag == cpu_to_be16(0xffff))
|
|
continue;
|
|
|
|
ret = dif_verify(sdt, fake_store(sector), sector, ei_lba);
|
|
if (ret) {
|
|
dif_errors++;
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
dif_copy_prot(SCpnt, start_sec, sectors, true);
|
|
dix_reads++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba,
|
|
unsigned int num, u32 ei_lba)
|
|
{
|
|
unsigned long iflags;
|
|
int ret;
|
|
|
|
ret = check_device_access_params(SCpnt, lba, num);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
|
|
(lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) &&
|
|
((lba + num) > OPT_MEDIUM_ERR_ADDR)) {
|
|
/* claim unrecoverable read error */
|
|
mk_sense_buffer(SCpnt, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
|
|
/* set info field and valid bit for fixed descriptor */
|
|
if (0x70 == (SCpnt->sense_buffer[0] & 0x7f)) {
|
|
SCpnt->sense_buffer[0] |= 0x80; /* Valid bit */
|
|
ret = (lba < OPT_MEDIUM_ERR_ADDR)
|
|
? OPT_MEDIUM_ERR_ADDR : (int)lba;
|
|
SCpnt->sense_buffer[3] = (ret >> 24) & 0xff;
|
|
SCpnt->sense_buffer[4] = (ret >> 16) & 0xff;
|
|
SCpnt->sense_buffer[5] = (ret >> 8) & 0xff;
|
|
SCpnt->sense_buffer[6] = ret & 0xff;
|
|
}
|
|
scsi_set_resid(SCpnt, scsi_bufflen(SCpnt));
|
|
return check_condition_result;
|
|
}
|
|
|
|
read_lock_irqsave(&atomic_rw, iflags);
|
|
|
|
/* DIX + T10 DIF */
|
|
if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
|
|
int prot_ret = prot_verify_read(SCpnt, lba, num, ei_lba);
|
|
|
|
if (prot_ret) {
|
|
read_unlock_irqrestore(&atomic_rw, iflags);
|
|
mk_sense_buffer(SCpnt, ABORTED_COMMAND, 0x10, prot_ret);
|
|
return illegal_condition_result;
|
|
}
|
|
}
|
|
|
|
ret = do_device_access(SCpnt, lba, num, 0);
|
|
read_unlock_irqrestore(&atomic_rw, iflags);
|
|
if (ret == -1)
|
|
return DID_ERROR << 16;
|
|
|
|
scsi_in(SCpnt)->resid = scsi_bufflen(SCpnt) - ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void dump_sector(unsigned char *buf, int len)
|
|
{
|
|
int i, j, n;
|
|
|
|
pr_err(">>> Sector Dump <<<\n");
|
|
for (i = 0 ; i < len ; i += 16) {
|
|
char b[128];
|
|
|
|
for (j = 0, n = 0; j < 16; j++) {
|
|
unsigned char c = buf[i+j];
|
|
|
|
if (c >= 0x20 && c < 0x7e)
|
|
n += scnprintf(b + n, sizeof(b) - n,
|
|
" %c ", buf[i+j]);
|
|
else
|
|
n += scnprintf(b + n, sizeof(b) - n,
|
|
"%02x ", buf[i+j]);
|
|
}
|
|
pr_err("%04d: %s\n", i, b);
|
|
}
|
|
}
|
|
|
|
static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
|
|
unsigned int sectors, u32 ei_lba)
|
|
{
|
|
int ret;
|
|
struct sd_dif_tuple *sdt;
|
|
void *daddr;
|
|
sector_t sector = start_sec;
|
|
int ppage_offset;
|
|
int dpage_offset;
|
|
struct sg_mapping_iter diter;
|
|
struct sg_mapping_iter piter;
|
|
|
|
BUG_ON(scsi_sg_count(SCpnt) == 0);
|
|
BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
|
|
|
|
sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
|
|
scsi_prot_sg_count(SCpnt),
|
|
SG_MITER_ATOMIC | SG_MITER_FROM_SG);
|
|
sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
|
|
SG_MITER_ATOMIC | SG_MITER_FROM_SG);
|
|
|
|
/* For each protection page */
|
|
while (sg_miter_next(&piter)) {
|
|
dpage_offset = 0;
|
|
if (WARN_ON(!sg_miter_next(&diter))) {
|
|
ret = 0x01;
|
|
goto out;
|
|
}
|
|
|
|
for (ppage_offset = 0; ppage_offset < piter.length;
|
|
ppage_offset += sizeof(struct sd_dif_tuple)) {
|
|
/* If we're at the end of the current
|
|
* data page advance to the next one
|
|
*/
|
|
if (dpage_offset >= diter.length) {
|
|
if (WARN_ON(!sg_miter_next(&diter))) {
|
|
ret = 0x01;
|
|
goto out;
|
|
}
|
|
dpage_offset = 0;
|
|
}
|
|
|
|
sdt = piter.addr + ppage_offset;
|
|
daddr = diter.addr + dpage_offset;
|
|
|
|
ret = dif_verify(sdt, daddr, sector, ei_lba);
|
|
if (ret) {
|
|
dump_sector(daddr, scsi_debug_sector_size);
|
|
goto out;
|
|
}
|
|
|
|
sector++;
|
|
ei_lba++;
|
|
dpage_offset += scsi_debug_sector_size;
|
|
}
|
|
diter.consumed = dpage_offset;
|
|
sg_miter_stop(&diter);
|
|
}
|
|
sg_miter_stop(&piter);
|
|
|
|
dif_copy_prot(SCpnt, start_sec, sectors, false);
|
|
dix_writes++;
|
|
|
|
return 0;
|
|
|
|
out:
|
|
dif_errors++;
|
|
sg_miter_stop(&diter);
|
|
sg_miter_stop(&piter);
|
|
return ret;
|
|
}
|
|
|
|
static unsigned long lba_to_map_index(sector_t lba)
|
|
{
|
|
if (scsi_debug_unmap_alignment) {
|
|
lba += scsi_debug_unmap_granularity -
|
|
scsi_debug_unmap_alignment;
|
|
}
|
|
do_div(lba, scsi_debug_unmap_granularity);
|
|
|
|
return lba;
|
|
}
|
|
|
|
static sector_t map_index_to_lba(unsigned long index)
|
|
{
|
|
sector_t lba = index * scsi_debug_unmap_granularity;
|
|
|
|
if (scsi_debug_unmap_alignment) {
|
|
lba -= scsi_debug_unmap_granularity -
|
|
scsi_debug_unmap_alignment;
|
|
}
|
|
|
|
return lba;
|
|
}
|
|
|
|
static unsigned int map_state(sector_t lba, unsigned int *num)
|
|
{
|
|
sector_t end;
|
|
unsigned int mapped;
|
|
unsigned long index;
|
|
unsigned long next;
|
|
|
|
index = lba_to_map_index(lba);
|
|
mapped = test_bit(index, map_storep);
|
|
|
|
if (mapped)
|
|
next = find_next_zero_bit(map_storep, map_size, index);
|
|
else
|
|
next = find_next_bit(map_storep, map_size, index);
|
|
|
|
end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
|
|
*num = end - lba;
|
|
|
|
return mapped;
|
|
}
|
|
|
|
static void map_region(sector_t lba, unsigned int len)
|
|
{
|
|
sector_t end = lba + len;
|
|
|
|
while (lba < end) {
|
|
unsigned long index = lba_to_map_index(lba);
|
|
|
|
if (index < map_size)
|
|
set_bit(index, map_storep);
|
|
|
|
lba = map_index_to_lba(index + 1);
|
|
}
|
|
}
|
|
|
|
static void unmap_region(sector_t lba, unsigned int len)
|
|
{
|
|
sector_t end = lba + len;
|
|
|
|
while (lba < end) {
|
|
unsigned long index = lba_to_map_index(lba);
|
|
|
|
if (lba == map_index_to_lba(index) &&
|
|
lba + scsi_debug_unmap_granularity <= end &&
|
|
index < map_size) {
|
|
clear_bit(index, map_storep);
|
|
if (scsi_debug_lbprz) {
|
|
memset(fake_storep +
|
|
lba * scsi_debug_sector_size, 0,
|
|
scsi_debug_sector_size *
|
|
scsi_debug_unmap_granularity);
|
|
}
|
|
if (dif_storep) {
|
|
memset(dif_storep + lba, 0xff,
|
|
sizeof(*dif_storep) *
|
|
scsi_debug_unmap_granularity);
|
|
}
|
|
}
|
|
lba = map_index_to_lba(index + 1);
|
|
}
|
|
}
|
|
|
|
static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba,
|
|
unsigned int num, u32 ei_lba)
|
|
{
|
|
unsigned long iflags;
|
|
int ret;
|
|
|
|
ret = check_device_access_params(SCpnt, lba, num);
|
|
if (ret)
|
|
return ret;
|
|
|
|
write_lock_irqsave(&atomic_rw, iflags);
|
|
|
|
/* DIX + T10 DIF */
|
|
if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
|
|
int prot_ret = prot_verify_write(SCpnt, lba, num, ei_lba);
|
|
|
|
if (prot_ret) {
|
|
write_unlock_irqrestore(&atomic_rw, iflags);
|
|
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, 0x10,
|
|
prot_ret);
|
|
return illegal_condition_result;
|
|
}
|
|
}
|
|
|
|
ret = do_device_access(SCpnt, lba, num, 1);
|
|
if (scsi_debug_lbp())
|
|
map_region(lba, num);
|
|
write_unlock_irqrestore(&atomic_rw, iflags);
|
|
if (-1 == ret)
|
|
return (DID_ERROR << 16);
|
|
else if ((ret < (num * scsi_debug_sector_size)) &&
|
|
(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
|
|
sdev_printk(KERN_INFO, SCpnt->device,
|
|
"%s: write: cdb indicated=%u, IO sent=%d bytes\n",
|
|
my_name, num * scsi_debug_sector_size, ret);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int resp_write_same(struct scsi_cmnd *scmd, unsigned long long lba,
|
|
unsigned int num, u32 ei_lba, unsigned int unmap)
|
|
{
|
|
unsigned long iflags;
|
|
unsigned long long i;
|
|
int ret;
|
|
|
|
ret = check_device_access_params(scmd, lba, num);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (num > scsi_debug_write_same_length) {
|
|
mk_sense_buffer(scmd, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
|
|
0);
|
|
return check_condition_result;
|
|
}
|
|
|
|
write_lock_irqsave(&atomic_rw, iflags);
|
|
|
|
if (unmap && scsi_debug_lbp()) {
|
|
unmap_region(lba, num);
|
|
goto out;
|
|
}
|
|
|
|
/* Else fetch one logical block */
|
|
ret = fetch_to_dev_buffer(scmd,
|
|
fake_storep + (lba * scsi_debug_sector_size),
|
|
scsi_debug_sector_size);
|
|
|
|
if (-1 == ret) {
|
|
write_unlock_irqrestore(&atomic_rw, iflags);
|
|
return (DID_ERROR << 16);
|
|
} else if ((ret < (num * scsi_debug_sector_size)) &&
|
|
(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
|
|
sdev_printk(KERN_INFO, scmd->device,
|
|
"%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
|
|
my_name, "write same",
|
|
num * scsi_debug_sector_size, ret);
|
|
|
|
/* Copy first sector to remaining blocks */
|
|
for (i = 1 ; i < num ; i++)
|
|
memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size),
|
|
fake_storep + (lba * scsi_debug_sector_size),
|
|
scsi_debug_sector_size);
|
|
|
|
if (scsi_debug_lbp())
|
|
map_region(lba, num);
|
|
out:
|
|
write_unlock_irqrestore(&atomic_rw, iflags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct unmap_block_desc {
|
|
__be64 lba;
|
|
__be32 blocks;
|
|
__be32 __reserved;
|
|
};
|
|
|
|
static int resp_unmap(struct scsi_cmnd * scmd, struct sdebug_dev_info * devip)
|
|
{
|
|
unsigned char *buf;
|
|
struct unmap_block_desc *desc;
|
|
unsigned int i, payload_len, descriptors;
|
|
int ret;
|
|
unsigned long iflags;
|
|
|
|
ret = check_readiness(scmd, UAS_ONLY, devip);
|
|
if (ret)
|
|
return ret;
|
|
|
|
payload_len = get_unaligned_be16(&scmd->cmnd[7]);
|
|
BUG_ON(scsi_bufflen(scmd) != payload_len);
|
|
|
|
descriptors = (payload_len - 8) / 16;
|
|
|
|
buf = kmalloc(scsi_bufflen(scmd), GFP_ATOMIC);
|
|
if (!buf)
|
|
return check_condition_result;
|
|
|
|
scsi_sg_copy_to_buffer(scmd, buf, scsi_bufflen(scmd));
|
|
|
|
BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
|
|
BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
|
|
|
|
desc = (void *)&buf[8];
|
|
|
|
write_lock_irqsave(&atomic_rw, iflags);
|
|
|
|
for (i = 0 ; i < descriptors ; i++) {
|
|
unsigned long long lba = get_unaligned_be64(&desc[i].lba);
|
|
unsigned int num = get_unaligned_be32(&desc[i].blocks);
|
|
|
|
ret = check_device_access_params(scmd, lba, num);
|
|
if (ret)
|
|
goto out;
|
|
|
|
unmap_region(lba, num);
|
|
}
|
|
|
|
ret = 0;
|
|
|
|
out:
|
|
write_unlock_irqrestore(&atomic_rw, iflags);
|
|
kfree(buf);
|
|
|
|
return ret;
|
|
}
|
|
|
|
#define SDEBUG_GET_LBA_STATUS_LEN 32
|
|
|
|
static int resp_get_lba_status(struct scsi_cmnd * scmd,
|
|
struct sdebug_dev_info * devip)
|
|
{
|
|
unsigned long long lba;
|
|
unsigned int alloc_len, mapped, num;
|
|
unsigned char arr[SDEBUG_GET_LBA_STATUS_LEN];
|
|
int ret;
|
|
|
|
ret = check_readiness(scmd, UAS_ONLY, devip);
|
|
if (ret)
|
|
return ret;
|
|
|
|
lba = get_unaligned_be64(&scmd->cmnd[2]);
|
|
alloc_len = get_unaligned_be32(&scmd->cmnd[10]);
|
|
|
|
if (alloc_len < 24)
|
|
return 0;
|
|
|
|
ret = check_device_access_params(scmd, lba, 1);
|
|
if (ret)
|
|
return ret;
|
|
|
|
mapped = map_state(lba, &num);
|
|
|
|
memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
|
|
put_unaligned_be32(20, &arr[0]); /* Parameter Data Length */
|
|
put_unaligned_be64(lba, &arr[8]); /* LBA */
|
|
put_unaligned_be32(num, &arr[16]); /* Number of blocks */
|
|
arr[20] = !mapped; /* mapped = 0, unmapped = 1 */
|
|
|
|
return fill_from_dev_buffer(scmd, arr, SDEBUG_GET_LBA_STATUS_LEN);
|
|
}
|
|
|
|
#define SDEBUG_RLUN_ARR_SZ 256
|
|
|
|
static int resp_report_luns(struct scsi_cmnd * scp,
|
|
struct sdebug_dev_info * devip)
|
|
{
|
|
unsigned int alloc_len;
|
|
int lun_cnt, i, upper, num, n;
|
|
u64 wlun, lun;
|
|
unsigned char *cmd = (unsigned char *)scp->cmnd;
|
|
int select_report = (int)cmd[2];
|
|
struct scsi_lun *one_lun;
|
|
unsigned char arr[SDEBUG_RLUN_ARR_SZ];
|
|
unsigned char * max_addr;
|
|
|
|
alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
|
|
if ((alloc_len < 4) || (select_report > 2)) {
|
|
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
|
|
0);
|
|
return check_condition_result;
|
|
}
|
|
/* can produce response with up to 16k luns (lun 0 to lun 16383) */
|
|
memset(arr, 0, SDEBUG_RLUN_ARR_SZ);
|
|
lun_cnt = scsi_debug_max_luns;
|
|
if (1 == select_report)
|
|
lun_cnt = 0;
|
|
else if (scsi_debug_no_lun_0 && (lun_cnt > 0))
|
|
--lun_cnt;
|
|
wlun = (select_report > 0) ? 1 : 0;
|
|
num = lun_cnt + wlun;
|
|
arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff;
|
|
arr[3] = (sizeof(struct scsi_lun) * num) & 0xff;
|
|
n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
|
|
sizeof(struct scsi_lun)), num);
|
|
if (n < num) {
|
|
wlun = 0;
|
|
lun_cnt = n;
|
|
}
|
|
one_lun = (struct scsi_lun *) &arr[8];
|
|
max_addr = arr + SDEBUG_RLUN_ARR_SZ;
|
|
for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0);
|
|
((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr));
|
|
i++, lun++) {
|
|
upper = (lun >> 8) & 0x3f;
|
|
if (upper)
|
|
one_lun[i].scsi_lun[0] =
|
|
(upper | (SAM2_LUN_ADDRESS_METHOD << 6));
|
|
one_lun[i].scsi_lun[1] = lun & 0xff;
|
|
}
|
|
if (wlun) {
|
|
one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff;
|
|
one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff;
|
|
i++;
|
|
}
|
|
alloc_len = (unsigned char *)(one_lun + i) - arr;
|
|
return fill_from_dev_buffer(scp, arr,
|
|
min((int)alloc_len, SDEBUG_RLUN_ARR_SZ));
|
|
}
|
|
|
|
static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
|
|
unsigned int num, struct sdebug_dev_info *devip)
|
|
{
|
|
int j;
|
|
unsigned char *kaddr, *buf;
|
|
unsigned int offset;
|
|
struct scsi_data_buffer *sdb = scsi_in(scp);
|
|
struct sg_mapping_iter miter;
|
|
|
|
/* better not to use temporary buffer. */
|
|
buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
|
|
if (!buf) {
|
|
mk_sense_buffer(scp, NOT_READY,
|
|
LOGICAL_UNIT_COMMUNICATION_FAILURE, 0);
|
|
return check_condition_result;
|
|
}
|
|
|
|
scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
|
|
|
|
offset = 0;
|
|
sg_miter_start(&miter, sdb->table.sgl, sdb->table.nents,
|
|
SG_MITER_ATOMIC | SG_MITER_TO_SG);
|
|
|
|
while (sg_miter_next(&miter)) {
|
|
kaddr = miter.addr;
|
|
for (j = 0; j < miter.length; j++)
|
|
*(kaddr + j) ^= *(buf + offset + j);
|
|
|
|
offset += miter.length;
|
|
}
|
|
sg_miter_stop(&miter);
|
|
kfree(buf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* When timer or tasklet goes off this function is called. */
|
|
static void sdebug_q_cmd_complete(unsigned long indx)
|
|
{
|
|
int qa_indx;
|
|
int retiring = 0;
|
|
unsigned long iflags;
|
|
struct sdebug_queued_cmd *sqcp;
|
|
struct scsi_cmnd *scp;
|
|
struct sdebug_dev_info *devip;
|
|
|
|
atomic_inc(&sdebug_completions);
|
|
qa_indx = indx;
|
|
if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) {
|
|
pr_err("%s: wild qa_indx=%d\n", __func__, qa_indx);
|
|
return;
|
|
}
|
|
spin_lock_irqsave(&queued_arr_lock, iflags);
|
|
sqcp = &queued_arr[qa_indx];
|
|
scp = sqcp->a_cmnd;
|
|
if (NULL == scp) {
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
pr_err("%s: scp is NULL\n", __func__);
|
|
return;
|
|
}
|
|
devip = (struct sdebug_dev_info *)scp->device->hostdata;
|
|
if (devip)
|
|
atomic_dec(&devip->num_in_q);
|
|
else
|
|
pr_err("%s: devip=NULL\n", __func__);
|
|
if (atomic_read(&retired_max_queue) > 0)
|
|
retiring = 1;
|
|
|
|
sqcp->a_cmnd = NULL;
|
|
if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) {
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
pr_err("%s: Unexpected completion\n", __func__);
|
|
return;
|
|
}
|
|
|
|
if (unlikely(retiring)) { /* user has reduced max_queue */
|
|
int k, retval;
|
|
|
|
retval = atomic_read(&retired_max_queue);
|
|
if (qa_indx >= retval) {
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
pr_err("%s: index %d too large\n", __func__, retval);
|
|
return;
|
|
}
|
|
k = find_last_bit(queued_in_use_bm, retval);
|
|
if ((k < scsi_debug_max_queue) || (k == retval))
|
|
atomic_set(&retired_max_queue, 0);
|
|
else
|
|
atomic_set(&retired_max_queue, k + 1);
|
|
}
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
scp->scsi_done(scp); /* callback to mid level */
|
|
}
|
|
|
|
/* When high resolution timer goes off this function is called. */
|
|
static enum hrtimer_restart
|
|
sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
|
|
{
|
|
int qa_indx;
|
|
int retiring = 0;
|
|
unsigned long iflags;
|
|
struct sdebug_hrtimer *sd_hrtp = (struct sdebug_hrtimer *)timer;
|
|
struct sdebug_queued_cmd *sqcp;
|
|
struct scsi_cmnd *scp;
|
|
struct sdebug_dev_info *devip;
|
|
|
|
atomic_inc(&sdebug_completions);
|
|
qa_indx = sd_hrtp->qa_indx;
|
|
if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) {
|
|
pr_err("%s: wild qa_indx=%d\n", __func__, qa_indx);
|
|
goto the_end;
|
|
}
|
|
spin_lock_irqsave(&queued_arr_lock, iflags);
|
|
sqcp = &queued_arr[qa_indx];
|
|
scp = sqcp->a_cmnd;
|
|
if (NULL == scp) {
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
pr_err("%s: scp is NULL\n", __func__);
|
|
goto the_end;
|
|
}
|
|
devip = (struct sdebug_dev_info *)scp->device->hostdata;
|
|
if (devip)
|
|
atomic_dec(&devip->num_in_q);
|
|
else
|
|
pr_err("%s: devip=NULL\n", __func__);
|
|
if (atomic_read(&retired_max_queue) > 0)
|
|
retiring = 1;
|
|
|
|
sqcp->a_cmnd = NULL;
|
|
if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) {
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
pr_err("%s: Unexpected completion\n", __func__);
|
|
goto the_end;
|
|
}
|
|
|
|
if (unlikely(retiring)) { /* user has reduced max_queue */
|
|
int k, retval;
|
|
|
|
retval = atomic_read(&retired_max_queue);
|
|
if (qa_indx >= retval) {
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
pr_err("%s: index %d too large\n", __func__, retval);
|
|
goto the_end;
|
|
}
|
|
k = find_last_bit(queued_in_use_bm, retval);
|
|
if ((k < scsi_debug_max_queue) || (k == retval))
|
|
atomic_set(&retired_max_queue, 0);
|
|
else
|
|
atomic_set(&retired_max_queue, k + 1);
|
|
}
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
scp->scsi_done(scp); /* callback to mid level */
|
|
the_end:
|
|
return HRTIMER_NORESTART;
|
|
}
|
|
|
|
static struct sdebug_dev_info *
|
|
sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags)
|
|
{
|
|
struct sdebug_dev_info *devip;
|
|
|
|
devip = kzalloc(sizeof(*devip), flags);
|
|
if (devip) {
|
|
devip->sdbg_host = sdbg_host;
|
|
list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
|
|
}
|
|
return devip;
|
|
}
|
|
|
|
static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev)
|
|
{
|
|
struct sdebug_host_info * sdbg_host;
|
|
struct sdebug_dev_info * open_devip = NULL;
|
|
struct sdebug_dev_info * devip =
|
|
(struct sdebug_dev_info *)sdev->hostdata;
|
|
|
|
if (devip)
|
|
return devip;
|
|
sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
|
|
if (!sdbg_host) {
|
|
pr_err("%s: Host info NULL\n", __func__);
|
|
return NULL;
|
|
}
|
|
list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
|
|
if ((devip->used) && (devip->channel == sdev->channel) &&
|
|
(devip->target == sdev->id) &&
|
|
(devip->lun == sdev->lun))
|
|
return devip;
|
|
else {
|
|
if ((!devip->used) && (!open_devip))
|
|
open_devip = devip;
|
|
}
|
|
}
|
|
if (!open_devip) { /* try and make a new one */
|
|
open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
|
|
if (!open_devip) {
|
|
printk(KERN_ERR "%s: out of memory at line %d\n",
|
|
__func__, __LINE__);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
open_devip->channel = sdev->channel;
|
|
open_devip->target = sdev->id;
|
|
open_devip->lun = sdev->lun;
|
|
open_devip->sdbg_host = sdbg_host;
|
|
atomic_set(&open_devip->num_in_q, 0);
|
|
set_bit(SDEBUG_UA_POR, open_devip->uas_bm);
|
|
open_devip->used = 1;
|
|
if (sdev->lun == SAM2_WLUN_REPORT_LUNS)
|
|
open_devip->wlun = SAM2_WLUN_REPORT_LUNS & 0xff;
|
|
|
|
return open_devip;
|
|
}
|
|
|
|
static int scsi_debug_slave_alloc(struct scsi_device *sdp)
|
|
{
|
|
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
|
|
printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %llu>\n",
|
|
sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
|
|
queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
|
|
return 0;
|
|
}
|
|
|
|
static int scsi_debug_slave_configure(struct scsi_device *sdp)
|
|
{
|
|
struct sdebug_dev_info *devip;
|
|
|
|
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
|
|
printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %llu>\n",
|
|
sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
|
|
if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN)
|
|
sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN;
|
|
devip = devInfoReg(sdp);
|
|
if (NULL == devip)
|
|
return 1; /* no resources, will be marked offline */
|
|
sdp->hostdata = devip;
|
|
sdp->tagged_supported = 1;
|
|
if (sdp->host->cmd_per_lun)
|
|
scsi_adjust_queue_depth(sdp, DEF_TAGGED_QUEUING,
|
|
DEF_CMD_PER_LUN);
|
|
blk_queue_max_segment_size(sdp->request_queue, -1U);
|
|
if (scsi_debug_no_uld)
|
|
sdp->no_uld_attach = 1;
|
|
return 0;
|
|
}
|
|
|
|
static void scsi_debug_slave_destroy(struct scsi_device *sdp)
|
|
{
|
|
struct sdebug_dev_info *devip =
|
|
(struct sdebug_dev_info *)sdp->hostdata;
|
|
|
|
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
|
|
printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %llu>\n",
|
|
sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
|
|
if (devip) {
|
|
/* make this slot available for re-use */
|
|
devip->used = 0;
|
|
sdp->hostdata = NULL;
|
|
}
|
|
}
|
|
|
|
/* Returns 1 if cmnd found (deletes its timer or tasklet), else returns 0 */
|
|
static int stop_queued_cmnd(struct scsi_cmnd *cmnd)
|
|
{
|
|
unsigned long iflags;
|
|
int k, qmax, r_qmax;
|
|
struct sdebug_queued_cmd *sqcp;
|
|
struct sdebug_dev_info *devip;
|
|
|
|
spin_lock_irqsave(&queued_arr_lock, iflags);
|
|
qmax = scsi_debug_max_queue;
|
|
r_qmax = atomic_read(&retired_max_queue);
|
|
if (r_qmax > qmax)
|
|
qmax = r_qmax;
|
|
for (k = 0; k < qmax; ++k) {
|
|
if (test_bit(k, queued_in_use_bm)) {
|
|
sqcp = &queued_arr[k];
|
|
if (cmnd == sqcp->a_cmnd) {
|
|
if (scsi_debug_ndelay > 0) {
|
|
if (sqcp->sd_hrtp)
|
|
hrtimer_cancel(
|
|
&sqcp->sd_hrtp->hrt);
|
|
} else if (scsi_debug_delay > 0) {
|
|
if (sqcp->cmnd_timerp)
|
|
del_timer_sync(
|
|
sqcp->cmnd_timerp);
|
|
} else if (scsi_debug_delay < 0) {
|
|
if (sqcp->tletp)
|
|
tasklet_kill(sqcp->tletp);
|
|
}
|
|
__clear_bit(k, queued_in_use_bm);
|
|
devip = (struct sdebug_dev_info *)
|
|
cmnd->device->hostdata;
|
|
if (devip)
|
|
atomic_dec(&devip->num_in_q);
|
|
sqcp->a_cmnd = NULL;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
return (k < qmax) ? 1 : 0;
|
|
}
|
|
|
|
/* Deletes (stops) timers or tasklets of all queued commands */
|
|
static void stop_all_queued(void)
|
|
{
|
|
unsigned long iflags;
|
|
int k;
|
|
struct sdebug_queued_cmd *sqcp;
|
|
struct sdebug_dev_info *devip;
|
|
|
|
spin_lock_irqsave(&queued_arr_lock, iflags);
|
|
for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
|
|
if (test_bit(k, queued_in_use_bm)) {
|
|
sqcp = &queued_arr[k];
|
|
if (sqcp->a_cmnd) {
|
|
if (scsi_debug_ndelay > 0) {
|
|
if (sqcp->sd_hrtp)
|
|
hrtimer_cancel(
|
|
&sqcp->sd_hrtp->hrt);
|
|
} else if (scsi_debug_delay > 0) {
|
|
if (sqcp->cmnd_timerp)
|
|
del_timer_sync(
|
|
sqcp->cmnd_timerp);
|
|
} else if (scsi_debug_delay < 0) {
|
|
if (sqcp->tletp)
|
|
tasklet_kill(sqcp->tletp);
|
|
}
|
|
__clear_bit(k, queued_in_use_bm);
|
|
devip = (struct sdebug_dev_info *)
|
|
sqcp->a_cmnd->device->hostdata;
|
|
if (devip)
|
|
atomic_dec(&devip->num_in_q);
|
|
sqcp->a_cmnd = NULL;
|
|
}
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
}
|
|
|
|
/* Free queued command memory on heap */
|
|
static void free_all_queued(void)
|
|
{
|
|
unsigned long iflags;
|
|
int k;
|
|
struct sdebug_queued_cmd *sqcp;
|
|
|
|
spin_lock_irqsave(&queued_arr_lock, iflags);
|
|
for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
|
|
sqcp = &queued_arr[k];
|
|
kfree(sqcp->cmnd_timerp);
|
|
sqcp->cmnd_timerp = NULL;
|
|
kfree(sqcp->tletp);
|
|
sqcp->tletp = NULL;
|
|
kfree(sqcp->sd_hrtp);
|
|
sqcp->sd_hrtp = NULL;
|
|
}
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
}
|
|
|
|
static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
|
|
{
|
|
++num_aborts;
|
|
if (SCpnt) {
|
|
if (SCpnt->device &&
|
|
(SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts))
|
|
sdev_printk(KERN_INFO, SCpnt->device, "%s\n",
|
|
__func__);
|
|
stop_queued_cmnd(SCpnt);
|
|
}
|
|
return SUCCESS;
|
|
}
|
|
|
|
static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
|
|
{
|
|
struct sdebug_dev_info * devip;
|
|
|
|
++num_dev_resets;
|
|
if (SCpnt && SCpnt->device) {
|
|
struct scsi_device *sdp = SCpnt->device;
|
|
|
|
if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
|
|
sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
|
|
devip = devInfoReg(sdp);
|
|
if (devip)
|
|
set_bit(SDEBUG_UA_POR, devip->uas_bm);
|
|
}
|
|
return SUCCESS;
|
|
}
|
|
|
|
static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
|
|
{
|
|
struct sdebug_host_info *sdbg_host;
|
|
struct sdebug_dev_info *devip;
|
|
struct scsi_device *sdp;
|
|
struct Scsi_Host *hp;
|
|
int k = 0;
|
|
|
|
++num_target_resets;
|
|
if (!SCpnt)
|
|
goto lie;
|
|
sdp = SCpnt->device;
|
|
if (!sdp)
|
|
goto lie;
|
|
if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
|
|
sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
|
|
hp = sdp->host;
|
|
if (!hp)
|
|
goto lie;
|
|
sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
|
|
if (sdbg_host) {
|
|
list_for_each_entry(devip,
|
|
&sdbg_host->dev_info_list,
|
|
dev_list)
|
|
if (devip->target == sdp->id) {
|
|
set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
|
|
++k;
|
|
}
|
|
}
|
|
if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
|
|
sdev_printk(KERN_INFO, sdp,
|
|
"%s: %d device(s) found in target\n", __func__, k);
|
|
lie:
|
|
return SUCCESS;
|
|
}
|
|
|
|
static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
|
|
{
|
|
struct sdebug_host_info *sdbg_host;
|
|
struct sdebug_dev_info *devip;
|
|
struct scsi_device * sdp;
|
|
struct Scsi_Host * hp;
|
|
int k = 0;
|
|
|
|
++num_bus_resets;
|
|
if (!(SCpnt && SCpnt->device))
|
|
goto lie;
|
|
sdp = SCpnt->device;
|
|
if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
|
|
sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
|
|
hp = sdp->host;
|
|
if (hp) {
|
|
sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
|
|
if (sdbg_host) {
|
|
list_for_each_entry(devip,
|
|
&sdbg_host->dev_info_list,
|
|
dev_list) {
|
|
set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
|
|
++k;
|
|
}
|
|
}
|
|
}
|
|
if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
|
|
sdev_printk(KERN_INFO, sdp,
|
|
"%s: %d device(s) found in host\n", __func__, k);
|
|
lie:
|
|
return SUCCESS;
|
|
}
|
|
|
|
static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
|
|
{
|
|
struct sdebug_host_info * sdbg_host;
|
|
struct sdebug_dev_info *devip;
|
|
int k = 0;
|
|
|
|
++num_host_resets;
|
|
if ((SCpnt->device) && (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts))
|
|
sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
|
|
spin_lock(&sdebug_host_list_lock);
|
|
list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
|
|
list_for_each_entry(devip, &sdbg_host->dev_info_list,
|
|
dev_list) {
|
|
set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
|
|
++k;
|
|
}
|
|
}
|
|
spin_unlock(&sdebug_host_list_lock);
|
|
stop_all_queued();
|
|
if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
|
|
sdev_printk(KERN_INFO, SCpnt->device,
|
|
"%s: %d device(s) found\n", __func__, k);
|
|
return SUCCESS;
|
|
}
|
|
|
|
static void __init sdebug_build_parts(unsigned char *ramp,
|
|
unsigned long store_size)
|
|
{
|
|
struct partition * pp;
|
|
int starts[SDEBUG_MAX_PARTS + 2];
|
|
int sectors_per_part, num_sectors, k;
|
|
int heads_by_sects, start_sec, end_sec;
|
|
|
|
/* assume partition table already zeroed */
|
|
if ((scsi_debug_num_parts < 1) || (store_size < 1048576))
|
|
return;
|
|
if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) {
|
|
scsi_debug_num_parts = SDEBUG_MAX_PARTS;
|
|
pr_warn("%s: reducing partitions to %d\n", __func__,
|
|
SDEBUG_MAX_PARTS);
|
|
}
|
|
num_sectors = (int)sdebug_store_sectors;
|
|
sectors_per_part = (num_sectors - sdebug_sectors_per)
|
|
/ scsi_debug_num_parts;
|
|
heads_by_sects = sdebug_heads * sdebug_sectors_per;
|
|
starts[0] = sdebug_sectors_per;
|
|
for (k = 1; k < scsi_debug_num_parts; ++k)
|
|
starts[k] = ((k * sectors_per_part) / heads_by_sects)
|
|
* heads_by_sects;
|
|
starts[scsi_debug_num_parts] = num_sectors;
|
|
starts[scsi_debug_num_parts + 1] = 0;
|
|
|
|
ramp[510] = 0x55; /* magic partition markings */
|
|
ramp[511] = 0xAA;
|
|
pp = (struct partition *)(ramp + 0x1be);
|
|
for (k = 0; starts[k + 1]; ++k, ++pp) {
|
|
start_sec = starts[k];
|
|
end_sec = starts[k + 1] - 1;
|
|
pp->boot_ind = 0;
|
|
|
|
pp->cyl = start_sec / heads_by_sects;
|
|
pp->head = (start_sec - (pp->cyl * heads_by_sects))
|
|
/ sdebug_sectors_per;
|
|
pp->sector = (start_sec % sdebug_sectors_per) + 1;
|
|
|
|
pp->end_cyl = end_sec / heads_by_sects;
|
|
pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
|
|
/ sdebug_sectors_per;
|
|
pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
|
|
|
|
pp->start_sect = cpu_to_le32(start_sec);
|
|
pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
|
|
pp->sys_ind = 0x83; /* plain Linux partition */
|
|
}
|
|
}
|
|
|
|
static int
|
|
schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
|
|
int scsi_result, int delta_jiff)
|
|
{
|
|
unsigned long iflags;
|
|
int k, num_in_q, tsf, qdepth, inject;
|
|
struct sdebug_queued_cmd *sqcp = NULL;
|
|
struct scsi_device *sdp = cmnd->device;
|
|
|
|
if (NULL == cmnd || NULL == devip) {
|
|
pr_warn("%s: called with NULL cmnd or devip pointer\n",
|
|
__func__);
|
|
/* no particularly good error to report back */
|
|
return SCSI_MLQUEUE_HOST_BUSY;
|
|
}
|
|
if ((scsi_result) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
|
|
sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
|
|
__func__, scsi_result);
|
|
if (delta_jiff == 0) {
|
|
/* using same thread to call back mid-layer */
|
|
cmnd->result = scsi_result;
|
|
cmnd->scsi_done(cmnd);
|
|
return 0;
|
|
}
|
|
|
|
/* deferred response cases */
|
|
spin_lock_irqsave(&queued_arr_lock, iflags);
|
|
num_in_q = atomic_read(&devip->num_in_q);
|
|
qdepth = cmnd->device->queue_depth;
|
|
k = find_first_zero_bit(queued_in_use_bm, scsi_debug_max_queue);
|
|
tsf = 0;
|
|
inject = 0;
|
|
if ((qdepth > 0) && (num_in_q >= qdepth))
|
|
tsf = 1;
|
|
else if ((scsi_debug_every_nth != 0) &&
|
|
(SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts)) {
|
|
if ((num_in_q == (qdepth - 1)) &&
|
|
(atomic_inc_return(&sdebug_a_tsf) >=
|
|
abs(scsi_debug_every_nth))) {
|
|
atomic_set(&sdebug_a_tsf, 0);
|
|
inject = 1;
|
|
tsf = 1;
|
|
}
|
|
}
|
|
|
|
/* if (tsf) simulate device reporting SCSI status of TASK SET FULL.
|
|
* Might override existing CHECK CONDITION. */
|
|
if (tsf)
|
|
scsi_result = device_qfull_result;
|
|
if (k >= scsi_debug_max_queue) {
|
|
if (SCSI_DEBUG_OPT_ALL_TSF & scsi_debug_opts)
|
|
tsf = 1;
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts)
|
|
sdev_printk(KERN_INFO, sdp,
|
|
"%s: num_in_q=%d, bypass q, %s%s\n",
|
|
__func__, num_in_q,
|
|
(inject ? "<inject> " : ""),
|
|
(tsf ? "status: TASK SET FULL" :
|
|
"report: host busy"));
|
|
if (tsf) {
|
|
/* queued_arr full so respond in same thread */
|
|
cmnd->result = scsi_result;
|
|
cmnd->scsi_done(cmnd);
|
|
/* As scsi_done() is called "inline" must return 0 */
|
|
return 0;
|
|
} else
|
|
return SCSI_MLQUEUE_HOST_BUSY;
|
|
}
|
|
__set_bit(k, queued_in_use_bm);
|
|
atomic_inc(&devip->num_in_q);
|
|
sqcp = &queued_arr[k];
|
|
sqcp->a_cmnd = cmnd;
|
|
cmnd->result = scsi_result;
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
if (delta_jiff > 0) {
|
|
if (NULL == sqcp->cmnd_timerp) {
|
|
sqcp->cmnd_timerp = kmalloc(sizeof(struct timer_list),
|
|
GFP_ATOMIC);
|
|
if (NULL == sqcp->cmnd_timerp)
|
|
return SCSI_MLQUEUE_HOST_BUSY;
|
|
init_timer(sqcp->cmnd_timerp);
|
|
}
|
|
sqcp->cmnd_timerp->function = sdebug_q_cmd_complete;
|
|
sqcp->cmnd_timerp->data = k;
|
|
sqcp->cmnd_timerp->expires = get_jiffies_64() + delta_jiff;
|
|
add_timer(sqcp->cmnd_timerp);
|
|
} else if (scsi_debug_ndelay > 0) {
|
|
ktime_t kt = ktime_set(0, scsi_debug_ndelay);
|
|
struct sdebug_hrtimer *sd_hp = sqcp->sd_hrtp;
|
|
|
|
if (NULL == sd_hp) {
|
|
sd_hp = kmalloc(sizeof(*sd_hp), GFP_ATOMIC);
|
|
if (NULL == sd_hp)
|
|
return SCSI_MLQUEUE_HOST_BUSY;
|
|
sqcp->sd_hrtp = sd_hp;
|
|
hrtimer_init(&sd_hp->hrt, CLOCK_MONOTONIC,
|
|
HRTIMER_MODE_REL);
|
|
sd_hp->hrt.function = sdebug_q_cmd_hrt_complete;
|
|
sd_hp->qa_indx = k;
|
|
}
|
|
hrtimer_start(&sd_hp->hrt, kt, HRTIMER_MODE_REL);
|
|
} else { /* delay < 0 */
|
|
if (NULL == sqcp->tletp) {
|
|
sqcp->tletp = kmalloc(sizeof(*sqcp->tletp),
|
|
GFP_ATOMIC);
|
|
if (NULL == sqcp->tletp)
|
|
return SCSI_MLQUEUE_HOST_BUSY;
|
|
tasklet_init(sqcp->tletp,
|
|
sdebug_q_cmd_complete, k);
|
|
}
|
|
if (-1 == delta_jiff)
|
|
tasklet_hi_schedule(sqcp->tletp);
|
|
else
|
|
tasklet_schedule(sqcp->tletp);
|
|
}
|
|
if (tsf && (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts))
|
|
sdev_printk(KERN_INFO, sdp,
|
|
"%s: num_in_q=%d +1, %s%s\n", __func__,
|
|
num_in_q, (inject ? "<inject> " : ""),
|
|
"status: TASK SET FULL");
|
|
return 0;
|
|
}
|
|
|
|
/* Note: The following macros create attribute files in the
|
|
/sys/module/scsi_debug/parameters directory. Unfortunately this
|
|
driver is unaware of a change and cannot trigger auxiliary actions
|
|
as it can when the corresponding attribute in the
|
|
/sys/bus/pseudo/drivers/scsi_debug directory is changed.
|
|
*/
|
|
module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
|
|
module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
|
|
module_param_named(clustering, scsi_debug_clustering, bool, S_IRUGO | S_IWUSR);
|
|
module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
|
|
module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
|
|
module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
|
|
module_param_named(dix, scsi_debug_dix, int, S_IRUGO);
|
|
module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR);
|
|
module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR);
|
|
module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR);
|
|
module_param_named(guard, scsi_debug_guard, uint, S_IRUGO);
|
|
module_param_named(host_lock, scsi_debug_host_lock, bool, S_IRUGO | S_IWUSR);
|
|
module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO);
|
|
module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO);
|
|
module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO);
|
|
module_param_named(lbprz, scsi_debug_lbprz, int, S_IRUGO);
|
|
module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO);
|
|
module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
|
|
module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR);
|
|
module_param_named(ndelay, scsi_debug_ndelay, int, S_IRUGO | S_IWUSR);
|
|
module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
|
|
module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO);
|
|
module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO);
|
|
module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR);
|
|
module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO);
|
|
module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
|
|
module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO);
|
|
module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
|
|
module_param_named(removable, scsi_debug_removable, bool, S_IRUGO | S_IWUSR);
|
|
module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
|
|
module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO);
|
|
module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO);
|
|
module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO);
|
|
module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO);
|
|
module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO);
|
|
module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
|
|
module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
|
|
S_IRUGO | S_IWUSR);
|
|
module_param_named(write_same_length, scsi_debug_write_same_length, int,
|
|
S_IRUGO | S_IWUSR);
|
|
|
|
MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
|
|
MODULE_DESCRIPTION("SCSI debug adapter driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION(SCSI_DEBUG_VERSION);
|
|
|
|
MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
|
|
MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
|
|
MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
|
|
MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
|
|
MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs(def=8)");
|
|
MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
|
|
MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
|
|
MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
|
|
MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
|
|
MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
|
|
MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
|
|
MODULE_PARM_DESC(host_lock, "use host_lock around all commands (def=0)");
|
|
MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
|
|
MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
|
|
MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
|
|
MODULE_PARM_DESC(lbprz, "unmapped blocks return 0 on read (def=1)");
|
|
MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
|
|
MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
|
|
MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
|
|
MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
|
|
MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
|
|
MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
|
|
MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
|
|
MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
|
|
MODULE_PARM_DESC(opt_blks, "optimal transfer length in block (def=64)");
|
|
MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
|
|
MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
|
|
MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
|
|
MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
|
|
MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])");
|
|
MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
|
|
MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
|
|
MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
|
|
MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
|
|
MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
|
|
MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)");
|
|
MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
|
|
MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
|
|
|
|
static char sdebug_info[256];
|
|
|
|
static const char * scsi_debug_info(struct Scsi_Host * shp)
|
|
{
|
|
sprintf(sdebug_info, "scsi_debug, version %s [%s], "
|
|
"dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION,
|
|
scsi_debug_version_date, scsi_debug_dev_size_mb,
|
|
scsi_debug_opts);
|
|
return sdebug_info;
|
|
}
|
|
|
|
/* 'echo <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 == strnicmp(work,"0x", 2)) {
|
|
if (1 == sscanf(&work[2], "%x", &opts))
|
|
goto opts_done;
|
|
} else {
|
|
if (1 == sscanf(work, "%d", &opts))
|
|
goto opts_done;
|
|
}
|
|
}
|
|
return -EINVAL;
|
|
opts_done:
|
|
scsi_debug_opts = opts;
|
|
atomic_set(&sdebug_cmnd_count, 0);
|
|
atomic_set(&sdebug_a_tsf, 0);
|
|
return count;
|
|
}
|
|
static DRIVER_ATTR_RW(opts);
|
|
|
|
static ssize_t ptype_show(struct device_driver *ddp, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
|
|
}
|
|
static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
|
|
size_t count)
|
|
{
|
|
int n;
|
|
|
|
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
|
|
scsi_debug_ptype = n;
|
|
return count;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
static DRIVER_ATTR_RW(ptype);
|
|
|
|
static ssize_t dsense_show(struct device_driver *ddp, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
|
|
}
|
|
static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
|
|
size_t count)
|
|
{
|
|
int n;
|
|
|
|
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
|
|
scsi_debug_dsense = n;
|
|
return count;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
static DRIVER_ATTR_RW(dsense);
|
|
|
|
static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
|
|
}
|
|
static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
|
|
size_t count)
|
|
{
|
|
int n;
|
|
|
|
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
|
|
n = (n > 0);
|
|
scsi_debug_fake_rw = (scsi_debug_fake_rw > 0);
|
|
if (scsi_debug_fake_rw != n) {
|
|
if ((0 == n) && (NULL == fake_storep)) {
|
|
unsigned long sz =
|
|
(unsigned long)scsi_debug_dev_size_mb *
|
|
1048576;
|
|
|
|
fake_storep = vmalloc(sz);
|
|
if (NULL == fake_storep) {
|
|
pr_err("%s: out of memory, 9\n",
|
|
__func__);
|
|
return -ENOMEM;
|
|
}
|
|
memset(fake_storep, 0, sz);
|
|
}
|
|
scsi_debug_fake_rw = n;
|
|
}
|
|
return count;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
static DRIVER_ATTR_RW(fake_rw);
|
|
|
|
static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0);
|
|
}
|
|
static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
|
|
size_t count)
|
|
{
|
|
int n;
|
|
|
|
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
|
|
scsi_debug_no_lun_0 = n;
|
|
return count;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
static DRIVER_ATTR_RW(no_lun_0);
|
|
|
|
static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
|
|
}
|
|
static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
|
|
size_t count)
|
|
{
|
|
int n;
|
|
|
|
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
|
|
scsi_debug_num_tgts = n;
|
|
sdebug_max_tgts_luns();
|
|
return count;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
static DRIVER_ATTR_RW(num_tgts);
|
|
|
|
static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
|
|
}
|
|
static DRIVER_ATTR_RO(dev_size_mb);
|
|
|
|
static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
|
|
}
|
|
static DRIVER_ATTR_RO(num_parts);
|
|
|
|
static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
|
|
}
|
|
static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
|
|
size_t count)
|
|
{
|
|
int nth;
|
|
|
|
if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
|
|
scsi_debug_every_nth = nth;
|
|
atomic_set(&sdebug_cmnd_count, 0);
|
|
return count;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
static DRIVER_ATTR_RW(every_nth);
|
|
|
|
static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
|
|
}
|
|
static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
|
|
size_t count)
|
|
{
|
|
int n;
|
|
|
|
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
|
|
scsi_debug_max_luns = n;
|
|
sdebug_max_tgts_luns();
|
|
return count;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
static DRIVER_ATTR_RW(max_luns);
|
|
|
|
static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue);
|
|
}
|
|
/* N.B. max_queue can be changed while there are queued commands. In flight
|
|
* commands beyond the new max_queue will be completed. */
|
|
static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
|
|
size_t count)
|
|
{
|
|
unsigned long iflags;
|
|
int n, k;
|
|
|
|
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
|
|
(n <= SCSI_DEBUG_CANQUEUE)) {
|
|
spin_lock_irqsave(&queued_arr_lock, iflags);
|
|
k = find_last_bit(queued_in_use_bm, SCSI_DEBUG_CANQUEUE);
|
|
scsi_debug_max_queue = n;
|
|
if (SCSI_DEBUG_CANQUEUE == k)
|
|
atomic_set(&retired_max_queue, 0);
|
|
else if (k >= n)
|
|
atomic_set(&retired_max_queue, k + 1);
|
|
else
|
|
atomic_set(&retired_max_queue, 0);
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
return count;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
static DRIVER_ATTR_RW(max_queue);
|
|
|
|
static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld);
|
|
}
|
|
static DRIVER_ATTR_RO(no_uld);
|
|
|
|
static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
|
|
}
|
|
static DRIVER_ATTR_RO(scsi_level);
|
|
|
|
static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb);
|
|
}
|
|
static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
|
|
size_t count)
|
|
{
|
|
int n;
|
|
|
|
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
|
|
scsi_debug_virtual_gb = n;
|
|
|
|
sdebug_capacity = get_sdebug_capacity();
|
|
|
|
return count;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
static DRIVER_ATTR_RW(virtual_gb);
|
|
|
|
static ssize_t add_host_show(struct device_driver *ddp, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
|
|
}
|
|
|
|
static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
|
|
size_t count)
|
|
{
|
|
int delta_hosts;
|
|
|
|
if (sscanf(buf, "%d", &delta_hosts) != 1)
|
|
return -EINVAL;
|
|
if (delta_hosts > 0) {
|
|
do {
|
|
sdebug_add_adapter();
|
|
} while (--delta_hosts);
|
|
} else if (delta_hosts < 0) {
|
|
do {
|
|
sdebug_remove_adapter();
|
|
} while (++delta_hosts);
|
|
}
|
|
return count;
|
|
}
|
|
static DRIVER_ATTR_RW(add_host);
|
|
|
|
static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno);
|
|
}
|
|
static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
|
|
size_t count)
|
|
{
|
|
int n;
|
|
|
|
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
|
|
scsi_debug_vpd_use_hostno = n;
|
|
return count;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
static DRIVER_ATTR_RW(vpd_use_hostno);
|
|
|
|
static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size);
|
|
}
|
|
static DRIVER_ATTR_RO(sector_size);
|
|
|
|
static ssize_t dix_show(struct device_driver *ddp, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix);
|
|
}
|
|
static DRIVER_ATTR_RO(dix);
|
|
|
|
static ssize_t dif_show(struct device_driver *ddp, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif);
|
|
}
|
|
static DRIVER_ATTR_RO(dif);
|
|
|
|
static ssize_t guard_show(struct device_driver *ddp, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_guard);
|
|
}
|
|
static DRIVER_ATTR_RO(guard);
|
|
|
|
static ssize_t ato_show(struct device_driver *ddp, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato);
|
|
}
|
|
static DRIVER_ATTR_RO(ato);
|
|
|
|
static ssize_t map_show(struct device_driver *ddp, char *buf)
|
|
{
|
|
ssize_t count;
|
|
|
|
if (!scsi_debug_lbp())
|
|
return scnprintf(buf, PAGE_SIZE, "0-%u\n",
|
|
sdebug_store_sectors);
|
|
|
|
count = bitmap_scnlistprintf(buf, PAGE_SIZE, map_storep, map_size);
|
|
|
|
buf[count++] = '\n';
|
|
buf[count++] = 0;
|
|
|
|
return count;
|
|
}
|
|
static DRIVER_ATTR_RO(map);
|
|
|
|
static ssize_t removable_show(struct device_driver *ddp, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_removable ? 1 : 0);
|
|
}
|
|
static ssize_t removable_store(struct device_driver *ddp, const char *buf,
|
|
size_t count)
|
|
{
|
|
int n;
|
|
|
|
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
|
|
scsi_debug_removable = (n > 0);
|
|
return count;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
static DRIVER_ATTR_RW(removable);
|
|
|
|
static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", !!scsi_debug_host_lock);
|
|
}
|
|
/* Returns -EBUSY if host_lock is being changed and commands are queued */
|
|
static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
|
|
size_t count)
|
|
{
|
|
int n, res;
|
|
|
|
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
|
|
bool new_host_lock = (n > 0);
|
|
|
|
res = count;
|
|
if (new_host_lock != scsi_debug_host_lock) {
|
|
unsigned long iflags;
|
|
int k;
|
|
|
|
spin_lock_irqsave(&queued_arr_lock, iflags);
|
|
k = find_first_bit(queued_in_use_bm,
|
|
scsi_debug_max_queue);
|
|
if (k != scsi_debug_max_queue)
|
|
res = -EBUSY; /* have queued commands */
|
|
else
|
|
scsi_debug_host_lock = new_host_lock;
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
}
|
|
return res;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
static DRIVER_ATTR_RW(host_lock);
|
|
|
|
|
|
/* Note: The following array creates attribute files in the
|
|
/sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
|
|
files (over those found in the /sys/module/scsi_debug/parameters
|
|
directory) is that auxiliary actions can be triggered when an attribute
|
|
is changed. For example see: sdebug_add_host_store() above.
|
|
*/
|
|
|
|
static struct attribute *sdebug_drv_attrs[] = {
|
|
&driver_attr_delay.attr,
|
|
&driver_attr_opts.attr,
|
|
&driver_attr_ptype.attr,
|
|
&driver_attr_dsense.attr,
|
|
&driver_attr_fake_rw.attr,
|
|
&driver_attr_no_lun_0.attr,
|
|
&driver_attr_num_tgts.attr,
|
|
&driver_attr_dev_size_mb.attr,
|
|
&driver_attr_num_parts.attr,
|
|
&driver_attr_every_nth.attr,
|
|
&driver_attr_max_luns.attr,
|
|
&driver_attr_max_queue.attr,
|
|
&driver_attr_no_uld.attr,
|
|
&driver_attr_scsi_level.attr,
|
|
&driver_attr_virtual_gb.attr,
|
|
&driver_attr_add_host.attr,
|
|
&driver_attr_vpd_use_hostno.attr,
|
|
&driver_attr_sector_size.attr,
|
|
&driver_attr_dix.attr,
|
|
&driver_attr_dif.attr,
|
|
&driver_attr_guard.attr,
|
|
&driver_attr_ato.attr,
|
|
&driver_attr_map.attr,
|
|
&driver_attr_removable.attr,
|
|
&driver_attr_host_lock.attr,
|
|
&driver_attr_ndelay.attr,
|
|
NULL,
|
|
};
|
|
ATTRIBUTE_GROUPS(sdebug_drv);
|
|
|
|
static struct device *pseudo_primary;
|
|
|
|
static int __init scsi_debug_init(void)
|
|
{
|
|
unsigned long sz;
|
|
int host_to_add;
|
|
int k;
|
|
int ret;
|
|
|
|
atomic_set(&sdebug_cmnd_count, 0);
|
|
atomic_set(&sdebug_completions, 0);
|
|
atomic_set(&retired_max_queue, 0);
|
|
|
|
if (scsi_debug_ndelay >= 1000000000) {
|
|
pr_warn("%s: ndelay must be less than 1 second, ignored\n",
|
|
__func__);
|
|
scsi_debug_ndelay = 0;
|
|
} else if (scsi_debug_ndelay > 0)
|
|
scsi_debug_delay = DELAY_OVERRIDDEN;
|
|
|
|
switch (scsi_debug_sector_size) {
|
|
case 512:
|
|
case 1024:
|
|
case 2048:
|
|
case 4096:
|
|
break;
|
|
default:
|
|
pr_err("%s: invalid sector_size %d\n", __func__,
|
|
scsi_debug_sector_size);
|
|
return -EINVAL;
|
|
}
|
|
|
|
switch (scsi_debug_dif) {
|
|
|
|
case SD_DIF_TYPE0_PROTECTION:
|
|
case SD_DIF_TYPE1_PROTECTION:
|
|
case SD_DIF_TYPE2_PROTECTION:
|
|
case SD_DIF_TYPE3_PROTECTION:
|
|
break;
|
|
|
|
default:
|
|
pr_err("%s: dif must be 0, 1, 2 or 3\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (scsi_debug_guard > 1) {
|
|
pr_err("%s: guard must be 0 or 1\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (scsi_debug_ato > 1) {
|
|
pr_err("%s: ato must be 0 or 1\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (scsi_debug_physblk_exp > 15) {
|
|
pr_err("%s: invalid physblk_exp %u\n", __func__,
|
|
scsi_debug_physblk_exp);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (scsi_debug_lowest_aligned > 0x3fff) {
|
|
pr_err("%s: lowest_aligned too big: %u\n", __func__,
|
|
scsi_debug_lowest_aligned);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (scsi_debug_dev_size_mb < 1)
|
|
scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
|
|
sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;
|
|
sdebug_store_sectors = sz / scsi_debug_sector_size;
|
|
sdebug_capacity = get_sdebug_capacity();
|
|
|
|
/* play around with geometry, don't waste too much on track 0 */
|
|
sdebug_heads = 8;
|
|
sdebug_sectors_per = 32;
|
|
if (scsi_debug_dev_size_mb >= 16)
|
|
sdebug_heads = 32;
|
|
else if (scsi_debug_dev_size_mb >= 256)
|
|
sdebug_heads = 64;
|
|
sdebug_cylinders_per = (unsigned long)sdebug_capacity /
|
|
(sdebug_sectors_per * sdebug_heads);
|
|
if (sdebug_cylinders_per >= 1024) {
|
|
/* other LLDs do this; implies >= 1GB ram disk ... */
|
|
sdebug_heads = 255;
|
|
sdebug_sectors_per = 63;
|
|
sdebug_cylinders_per = (unsigned long)sdebug_capacity /
|
|
(sdebug_sectors_per * sdebug_heads);
|
|
}
|
|
|
|
if (0 == scsi_debug_fake_rw) {
|
|
fake_storep = vmalloc(sz);
|
|
if (NULL == fake_storep) {
|
|
pr_err("%s: out of memory, 1\n", __func__);
|
|
return -ENOMEM;
|
|
}
|
|
memset(fake_storep, 0, sz);
|
|
if (scsi_debug_num_parts > 0)
|
|
sdebug_build_parts(fake_storep, sz);
|
|
}
|
|
|
|
if (scsi_debug_dix) {
|
|
int dif_size;
|
|
|
|
dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple);
|
|
dif_storep = vmalloc(dif_size);
|
|
|
|
pr_err("%s: dif_storep %u bytes @ %p\n", __func__, dif_size,
|
|
dif_storep);
|
|
|
|
if (dif_storep == NULL) {
|
|
pr_err("%s: out of mem. (DIX)\n", __func__);
|
|
ret = -ENOMEM;
|
|
goto free_vm;
|
|
}
|
|
|
|
memset(dif_storep, 0xff, dif_size);
|
|
}
|
|
|
|
/* Logical Block Provisioning */
|
|
if (scsi_debug_lbp()) {
|
|
scsi_debug_unmap_max_blocks =
|
|
clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU);
|
|
|
|
scsi_debug_unmap_max_desc =
|
|
clamp(scsi_debug_unmap_max_desc, 0U, 256U);
|
|
|
|
scsi_debug_unmap_granularity =
|
|
clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU);
|
|
|
|
if (scsi_debug_unmap_alignment &&
|
|
scsi_debug_unmap_granularity <=
|
|
scsi_debug_unmap_alignment) {
|
|
pr_err("%s: ERR: unmap_granularity <= unmap_alignment\n",
|
|
__func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
|
|
map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long));
|
|
|
|
pr_info("%s: %lu provisioning blocks\n", __func__, map_size);
|
|
|
|
if (map_storep == NULL) {
|
|
pr_err("%s: out of mem. (MAP)\n", __func__);
|
|
ret = -ENOMEM;
|
|
goto free_vm;
|
|
}
|
|
|
|
bitmap_zero(map_storep, map_size);
|
|
|
|
/* Map first 1KB for partition table */
|
|
if (scsi_debug_num_parts)
|
|
map_region(0, 2);
|
|
}
|
|
|
|
pseudo_primary = root_device_register("pseudo_0");
|
|
if (IS_ERR(pseudo_primary)) {
|
|
pr_warn("%s: root_device_register() error\n", __func__);
|
|
ret = PTR_ERR(pseudo_primary);
|
|
goto free_vm;
|
|
}
|
|
ret = bus_register(&pseudo_lld_bus);
|
|
if (ret < 0) {
|
|
pr_warn("%s: bus_register error: %d\n", __func__, ret);
|
|
goto dev_unreg;
|
|
}
|
|
ret = driver_register(&sdebug_driverfs_driver);
|
|
if (ret < 0) {
|
|
pr_warn("%s: driver_register error: %d\n", __func__, ret);
|
|
goto bus_unreg;
|
|
}
|
|
|
|
host_to_add = scsi_debug_add_host;
|
|
scsi_debug_add_host = 0;
|
|
|
|
for (k = 0; k < host_to_add; k++) {
|
|
if (sdebug_add_adapter()) {
|
|
pr_err("%s: sdebug_add_adapter failed k=%d\n",
|
|
__func__, k);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
|
|
pr_info("%s: built %d host(s)\n", __func__,
|
|
scsi_debug_add_host);
|
|
}
|
|
return 0;
|
|
|
|
bus_unreg:
|
|
bus_unregister(&pseudo_lld_bus);
|
|
dev_unreg:
|
|
root_device_unregister(pseudo_primary);
|
|
free_vm:
|
|
if (map_storep)
|
|
vfree(map_storep);
|
|
if (dif_storep)
|
|
vfree(dif_storep);
|
|
vfree(fake_storep);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __exit scsi_debug_exit(void)
|
|
{
|
|
int k = scsi_debug_add_host;
|
|
|
|
stop_all_queued();
|
|
free_all_queued();
|
|
for (; k; k--)
|
|
sdebug_remove_adapter();
|
|
driver_unregister(&sdebug_driverfs_driver);
|
|
bus_unregister(&pseudo_lld_bus);
|
|
root_device_unregister(pseudo_primary);
|
|
|
|
if (dif_storep)
|
|
vfree(dif_storep);
|
|
|
|
vfree(fake_storep);
|
|
}
|
|
|
|
device_initcall(scsi_debug_init);
|
|
module_exit(scsi_debug_exit);
|
|
|
|
static void sdebug_release_adapter(struct device * dev)
|
|
{
|
|
struct sdebug_host_info *sdbg_host;
|
|
|
|
sdbg_host = to_sdebug_host(dev);
|
|
kfree(sdbg_host);
|
|
}
|
|
|
|
static int sdebug_add_adapter(void)
|
|
{
|
|
int k, devs_per_host;
|
|
int error = 0;
|
|
struct sdebug_host_info *sdbg_host;
|
|
struct sdebug_dev_info *sdbg_devinfo, *tmp;
|
|
|
|
sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
|
|
if (NULL == sdbg_host) {
|
|
printk(KERN_ERR "%s: out of memory at line %d\n",
|
|
__func__, __LINE__);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
INIT_LIST_HEAD(&sdbg_host->dev_info_list);
|
|
|
|
devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns;
|
|
for (k = 0; k < devs_per_host; k++) {
|
|
sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
|
|
if (!sdbg_devinfo) {
|
|
printk(KERN_ERR "%s: out of memory at line %d\n",
|
|
__func__, __LINE__);
|
|
error = -ENOMEM;
|
|
goto clean;
|
|
}
|
|
}
|
|
|
|
spin_lock(&sdebug_host_list_lock);
|
|
list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
|
|
spin_unlock(&sdebug_host_list_lock);
|
|
|
|
sdbg_host->dev.bus = &pseudo_lld_bus;
|
|
sdbg_host->dev.parent = pseudo_primary;
|
|
sdbg_host->dev.release = &sdebug_release_adapter;
|
|
dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);
|
|
|
|
error = device_register(&sdbg_host->dev);
|
|
|
|
if (error)
|
|
goto clean;
|
|
|
|
++scsi_debug_add_host;
|
|
return error;
|
|
|
|
clean:
|
|
list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
|
|
dev_list) {
|
|
list_del(&sdbg_devinfo->dev_list);
|
|
kfree(sdbg_devinfo);
|
|
}
|
|
|
|
kfree(sdbg_host);
|
|
return error;
|
|
}
|
|
|
|
static void sdebug_remove_adapter(void)
|
|
{
|
|
struct sdebug_host_info * sdbg_host = NULL;
|
|
|
|
spin_lock(&sdebug_host_list_lock);
|
|
if (!list_empty(&sdebug_host_list)) {
|
|
sdbg_host = list_entry(sdebug_host_list.prev,
|
|
struct sdebug_host_info, host_list);
|
|
list_del(&sdbg_host->host_list);
|
|
}
|
|
spin_unlock(&sdebug_host_list_lock);
|
|
|
|
if (!sdbg_host)
|
|
return;
|
|
|
|
device_unregister(&sdbg_host->dev);
|
|
--scsi_debug_add_host;
|
|
}
|
|
|
|
static int
|
|
scsi_debug_queuecommand(struct scsi_cmnd *SCpnt)
|
|
{
|
|
unsigned char *cmd = (unsigned char *) SCpnt->cmnd;
|
|
int len, k;
|
|
unsigned int num;
|
|
unsigned long long lba;
|
|
u32 ei_lba;
|
|
int errsts = 0;
|
|
int target = SCpnt->device->id;
|
|
struct sdebug_dev_info *devip = NULL;
|
|
int inj_recovered = 0;
|
|
int inj_transport = 0;
|
|
int inj_dif = 0;
|
|
int inj_dix = 0;
|
|
int inj_short = 0;
|
|
int delay_override = 0;
|
|
int unmap = 0;
|
|
|
|
scsi_set_resid(SCpnt, 0);
|
|
if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) &&
|
|
!(SCSI_DEBUG_OPT_NO_CDB_NOISE & scsi_debug_opts) && cmd) {
|
|
char b[120];
|
|
int n;
|
|
|
|
len = SCpnt->cmd_len;
|
|
if (len > 32)
|
|
strcpy(b, "too long, over 32 bytes");
|
|
else {
|
|
for (k = 0, n = 0; k < len; ++k)
|
|
n += scnprintf(b + n, sizeof(b) - n, "%02x ",
|
|
(unsigned int)cmd[k]);
|
|
}
|
|
sdev_printk(KERN_INFO, SCpnt->device, "%s: cmd %s\n", my_name,
|
|
b);
|
|
}
|
|
|
|
if ((SCpnt->device->lun >= scsi_debug_max_luns) &&
|
|
(SCpnt->device->lun != SAM2_WLUN_REPORT_LUNS))
|
|
return schedule_resp(SCpnt, NULL, DID_NO_CONNECT << 16, 0);
|
|
devip = devInfoReg(SCpnt->device);
|
|
if (NULL == devip)
|
|
return schedule_resp(SCpnt, NULL, DID_NO_CONNECT << 16, 0);
|
|
|
|
if ((scsi_debug_every_nth != 0) &&
|
|
(atomic_inc_return(&sdebug_cmnd_count) >=
|
|
abs(scsi_debug_every_nth))) {
|
|
atomic_set(&sdebug_cmnd_count, 0);
|
|
if (scsi_debug_every_nth < -1)
|
|
scsi_debug_every_nth = -1;
|
|
if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
|
|
return 0; /* ignore command causing timeout */
|
|
else if (SCSI_DEBUG_OPT_MAC_TIMEOUT & scsi_debug_opts &&
|
|
scsi_medium_access_command(SCpnt))
|
|
return 0; /* time out reads and writes */
|
|
else if (SCSI_DEBUG_OPT_RECOVERED_ERR & scsi_debug_opts)
|
|
inj_recovered = 1; /* to reads and writes below */
|
|
else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & scsi_debug_opts)
|
|
inj_transport = 1; /* to reads and writes below */
|
|
else if (SCSI_DEBUG_OPT_DIF_ERR & scsi_debug_opts)
|
|
inj_dif = 1; /* to reads and writes below */
|
|
else if (SCSI_DEBUG_OPT_DIX_ERR & scsi_debug_opts)
|
|
inj_dix = 1; /* to reads and writes below */
|
|
else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & scsi_debug_opts)
|
|
inj_short = 1;
|
|
}
|
|
|
|
if (devip->wlun) {
|
|
switch (*cmd) {
|
|
case INQUIRY:
|
|
case REQUEST_SENSE:
|
|
case TEST_UNIT_READY:
|
|
case REPORT_LUNS:
|
|
break; /* only allowable wlun commands */
|
|
default:
|
|
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
|
|
printk(KERN_INFO "scsi_debug: Opcode: 0x%x "
|
|
"not supported for wlun\n", *cmd);
|
|
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST,
|
|
INVALID_OPCODE, 0);
|
|
errsts = check_condition_result;
|
|
return schedule_resp(SCpnt, devip, errsts, 0);
|
|
}
|
|
}
|
|
|
|
switch (*cmd) {
|
|
case INQUIRY: /* mandatory, ignore unit attention */
|
|
delay_override = 1;
|
|
errsts = resp_inquiry(SCpnt, target, devip);
|
|
break;
|
|
case REQUEST_SENSE: /* mandatory, ignore unit attention */
|
|
delay_override = 1;
|
|
errsts = resp_requests(SCpnt, devip);
|
|
break;
|
|
case REZERO_UNIT: /* actually this is REWIND for SSC */
|
|
case START_STOP:
|
|
errsts = resp_start_stop(SCpnt, devip);
|
|
break;
|
|
case ALLOW_MEDIUM_REMOVAL:
|
|
errsts = check_readiness(SCpnt, UAS_ONLY, devip);
|
|
if (errsts)
|
|
break;
|
|
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
|
|
printk(KERN_INFO "scsi_debug: Medium removal %s\n",
|
|
cmd[4] ? "inhibited" : "enabled");
|
|
break;
|
|
case SEND_DIAGNOSTIC: /* mandatory */
|
|
errsts = check_readiness(SCpnt, UAS_ONLY, devip);
|
|
break;
|
|
case TEST_UNIT_READY: /* mandatory */
|
|
/* delay_override = 1; */
|
|
errsts = check_readiness(SCpnt, UAS_TUR, devip);
|
|
break;
|
|
case RESERVE:
|
|
errsts = check_readiness(SCpnt, UAS_ONLY, devip);
|
|
break;
|
|
case RESERVE_10:
|
|
errsts = check_readiness(SCpnt, UAS_ONLY, devip);
|
|
break;
|
|
case RELEASE:
|
|
errsts = check_readiness(SCpnt, UAS_ONLY, devip);
|
|
break;
|
|
case RELEASE_10:
|
|
errsts = check_readiness(SCpnt, UAS_ONLY, devip);
|
|
break;
|
|
case READ_CAPACITY:
|
|
errsts = resp_readcap(SCpnt, devip);
|
|
break;
|
|
case SERVICE_ACTION_IN:
|
|
if (cmd[1] == SAI_READ_CAPACITY_16)
|
|
errsts = resp_readcap16(SCpnt, devip);
|
|
else if (cmd[1] == SAI_GET_LBA_STATUS) {
|
|
|
|
if (scsi_debug_lbp() == 0) {
|
|
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST,
|
|
INVALID_COMMAND_OPCODE, 0);
|
|
errsts = check_condition_result;
|
|
} else
|
|
errsts = resp_get_lba_status(SCpnt, devip);
|
|
} else {
|
|
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST,
|
|
INVALID_OPCODE, 0);
|
|
errsts = check_condition_result;
|
|
}
|
|
break;
|
|
case MAINTENANCE_IN:
|
|
if (MI_REPORT_TARGET_PGS != cmd[1]) {
|
|
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST,
|
|
INVALID_OPCODE, 0);
|
|
errsts = check_condition_result;
|
|
break;
|
|
}
|
|
errsts = resp_report_tgtpgs(SCpnt, devip);
|
|
break;
|
|
case READ_16:
|
|
case READ_12:
|
|
case READ_10:
|
|
/* READ{10,12,16} and DIF Type 2 are natural enemies */
|
|
if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
|
|
cmd[1] & 0xe0) {
|
|
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST,
|
|
INVALID_COMMAND_OPCODE, 0);
|
|
errsts = check_condition_result;
|
|
break;
|
|
}
|
|
|
|
if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
|
|
scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
|
|
(cmd[1] & 0xe0) == 0)
|
|
printk(KERN_ERR "Unprotected RD/WR to DIF device\n");
|
|
|
|
/* fall through */
|
|
case READ_6:
|
|
read:
|
|
errsts = check_readiness(SCpnt, UAS_TUR, devip);
|
|
if (errsts)
|
|
break;
|
|
if (scsi_debug_fake_rw)
|
|
break;
|
|
get_data_transfer_info(cmd, &lba, &num, &ei_lba);
|
|
|
|
if (inj_short)
|
|
num /= 2;
|
|
|
|
errsts = resp_read(SCpnt, lba, num, ei_lba);
|
|
if (inj_recovered && (0 == errsts)) {
|
|
mk_sense_buffer(SCpnt, RECOVERED_ERROR,
|
|
THRESHOLD_EXCEEDED, 0);
|
|
errsts = check_condition_result;
|
|
} else if (inj_transport && (0 == errsts)) {
|
|
mk_sense_buffer(SCpnt, ABORTED_COMMAND,
|
|
TRANSPORT_PROBLEM, ACK_NAK_TO);
|
|
errsts = check_condition_result;
|
|
} else if (inj_dif && (0 == errsts)) {
|
|
/* Logical block guard check failed */
|
|
mk_sense_buffer(SCpnt, ABORTED_COMMAND, 0x10, 1);
|
|
errsts = illegal_condition_result;
|
|
} else if (inj_dix && (0 == errsts)) {
|
|
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, 0x10, 1);
|
|
errsts = illegal_condition_result;
|
|
}
|
|
break;
|
|
case REPORT_LUNS: /* mandatory, ignore unit attention */
|
|
delay_override = 1;
|
|
errsts = resp_report_luns(SCpnt, devip);
|
|
break;
|
|
case VERIFY: /* 10 byte SBC-2 command */
|
|
errsts = check_readiness(SCpnt, UAS_TUR, devip);
|
|
break;
|
|
case WRITE_16:
|
|
case WRITE_12:
|
|
case WRITE_10:
|
|
/* WRITE{10,12,16} and DIF Type 2 are natural enemies */
|
|
if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
|
|
cmd[1] & 0xe0) {
|
|
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST,
|
|
INVALID_COMMAND_OPCODE, 0);
|
|
errsts = check_condition_result;
|
|
break;
|
|
}
|
|
|
|
if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
|
|
scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
|
|
(cmd[1] & 0xe0) == 0)
|
|
printk(KERN_ERR "Unprotected RD/WR to DIF device\n");
|
|
|
|
/* fall through */
|
|
case WRITE_6:
|
|
write:
|
|
errsts = check_readiness(SCpnt, UAS_TUR, devip);
|
|
if (errsts)
|
|
break;
|
|
if (scsi_debug_fake_rw)
|
|
break;
|
|
get_data_transfer_info(cmd, &lba, &num, &ei_lba);
|
|
errsts = resp_write(SCpnt, lba, num, ei_lba);
|
|
if (inj_recovered && (0 == errsts)) {
|
|
mk_sense_buffer(SCpnt, RECOVERED_ERROR,
|
|
THRESHOLD_EXCEEDED, 0);
|
|
errsts = check_condition_result;
|
|
} else if (inj_dif && (0 == errsts)) {
|
|
mk_sense_buffer(SCpnt, ABORTED_COMMAND, 0x10, 1);
|
|
errsts = illegal_condition_result;
|
|
} else if (inj_dix && (0 == errsts)) {
|
|
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, 0x10, 1);
|
|
errsts = illegal_condition_result;
|
|
}
|
|
break;
|
|
case WRITE_SAME_16:
|
|
case WRITE_SAME:
|
|
if (cmd[1] & 0x8) {
|
|
if ((*cmd == WRITE_SAME_16 && scsi_debug_lbpws == 0) ||
|
|
(*cmd == WRITE_SAME && scsi_debug_lbpws10 == 0)) {
|
|
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST,
|
|
INVALID_FIELD_IN_CDB, 0);
|
|
errsts = check_condition_result;
|
|
} else
|
|
unmap = 1;
|
|
}
|
|
if (errsts)
|
|
break;
|
|
errsts = check_readiness(SCpnt, UAS_TUR, devip);
|
|
if (errsts)
|
|
break;
|
|
if (scsi_debug_fake_rw)
|
|
break;
|
|
get_data_transfer_info(cmd, &lba, &num, &ei_lba);
|
|
errsts = resp_write_same(SCpnt, lba, num, ei_lba, unmap);
|
|
break;
|
|
case UNMAP:
|
|
errsts = check_readiness(SCpnt, UAS_TUR, devip);
|
|
if (errsts)
|
|
break;
|
|
if (scsi_debug_fake_rw)
|
|
break;
|
|
|
|
if (scsi_debug_unmap_max_desc == 0 || scsi_debug_lbpu == 0) {
|
|
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST,
|
|
INVALID_COMMAND_OPCODE, 0);
|
|
errsts = check_condition_result;
|
|
} else
|
|
errsts = resp_unmap(SCpnt, devip);
|
|
break;
|
|
case MODE_SENSE:
|
|
case MODE_SENSE_10:
|
|
errsts = resp_mode_sense(SCpnt, target, devip);
|
|
break;
|
|
case MODE_SELECT:
|
|
errsts = resp_mode_select(SCpnt, 1, devip);
|
|
break;
|
|
case MODE_SELECT_10:
|
|
errsts = resp_mode_select(SCpnt, 0, devip);
|
|
break;
|
|
case LOG_SENSE:
|
|
errsts = resp_log_sense(SCpnt, devip);
|
|
break;
|
|
case SYNCHRONIZE_CACHE:
|
|
delay_override = 1;
|
|
errsts = check_readiness(SCpnt, UAS_TUR, devip);
|
|
break;
|
|
case WRITE_BUFFER:
|
|
errsts = check_readiness(SCpnt, UAS_ONLY, devip);
|
|
break;
|
|
case XDWRITEREAD_10:
|
|
if (!scsi_bidi_cmnd(SCpnt)) {
|
|
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST,
|
|
INVALID_FIELD_IN_CDB, 0);
|
|
errsts = check_condition_result;
|
|
break;
|
|
}
|
|
|
|
errsts = check_readiness(SCpnt, UAS_TUR, devip);
|
|
if (errsts)
|
|
break;
|
|
if (scsi_debug_fake_rw)
|
|
break;
|
|
get_data_transfer_info(cmd, &lba, &num, &ei_lba);
|
|
errsts = resp_read(SCpnt, lba, num, ei_lba);
|
|
if (errsts)
|
|
break;
|
|
errsts = resp_write(SCpnt, lba, num, ei_lba);
|
|
if (errsts)
|
|
break;
|
|
errsts = resp_xdwriteread(SCpnt, lba, num, devip);
|
|
break;
|
|
case VARIABLE_LENGTH_CMD:
|
|
if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION) {
|
|
|
|
if ((cmd[10] & 0xe0) == 0)
|
|
printk(KERN_ERR
|
|
"Unprotected RD/WR to DIF device\n");
|
|
|
|
if (cmd[9] == READ_32) {
|
|
BUG_ON(SCpnt->cmd_len < 32);
|
|
goto read;
|
|
}
|
|
|
|
if (cmd[9] == WRITE_32) {
|
|
BUG_ON(SCpnt->cmd_len < 32);
|
|
goto write;
|
|
}
|
|
}
|
|
|
|
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST,
|
|
INVALID_FIELD_IN_CDB, 0);
|
|
errsts = check_condition_result;
|
|
break;
|
|
case 0x85:
|
|
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
|
|
sdev_printk(KERN_INFO, SCpnt->device,
|
|
"%s: ATA PASS-THROUGH(16) not supported\n", my_name);
|
|
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST,
|
|
INVALID_OPCODE, 0);
|
|
errsts = check_condition_result;
|
|
break;
|
|
default:
|
|
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
|
|
sdev_printk(KERN_INFO, SCpnt->device,
|
|
"%s: Opcode: 0x%x not supported\n",
|
|
my_name, *cmd);
|
|
errsts = check_readiness(SCpnt, UAS_ONLY, devip);
|
|
if (errsts)
|
|
break; /* Unit attention takes precedence */
|
|
mk_sense_buffer(SCpnt, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
|
|
errsts = check_condition_result;
|
|
break;
|
|
}
|
|
return schedule_resp(SCpnt, devip, errsts,
|
|
(delay_override ? 0 : scsi_debug_delay));
|
|
}
|
|
|
|
static int
|
|
sdebug_queuecommand_lock_or_not(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
|
|
{
|
|
if (scsi_debug_host_lock) {
|
|
unsigned long iflags;
|
|
int rc;
|
|
|
|
spin_lock_irqsave(shost->host_lock, iflags);
|
|
rc = scsi_debug_queuecommand(cmd);
|
|
spin_unlock_irqrestore(shost->host_lock, iflags);
|
|
return rc;
|
|
} else
|
|
return scsi_debug_queuecommand(cmd);
|
|
}
|
|
|
|
static int
|
|
sdebug_change_qdepth(struct scsi_device *sdev, int qdepth, int reason)
|
|
{
|
|
int num_in_q = 0;
|
|
int bad = 0;
|
|
unsigned long iflags;
|
|
struct sdebug_dev_info *devip;
|
|
|
|
spin_lock_irqsave(&queued_arr_lock, iflags);
|
|
devip = (struct sdebug_dev_info *)sdev->hostdata;
|
|
if (NULL == devip) {
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
return -ENODEV;
|
|
}
|
|
num_in_q = atomic_read(&devip->num_in_q);
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
if (reason == SCSI_QDEPTH_DEFAULT || reason == SCSI_QDEPTH_RAMP_UP) {
|
|
if (qdepth < 1)
|
|
qdepth = 1;
|
|
/* allow to exceed max host queued_arr elements for testing */
|
|
if (qdepth > SCSI_DEBUG_CANQUEUE + 10)
|
|
qdepth = SCSI_DEBUG_CANQUEUE + 10;
|
|
scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
|
|
} else if (reason == SCSI_QDEPTH_QFULL)
|
|
scsi_track_queue_full(sdev, qdepth);
|
|
else
|
|
bad = 1;
|
|
if (bad)
|
|
sdev_printk(KERN_WARNING, sdev,
|
|
"%s: unknown reason=0x%x\n", __func__, reason);
|
|
if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) {
|
|
if (SCSI_QDEPTH_QFULL == reason)
|
|
sdev_printk(KERN_INFO, sdev,
|
|
"%s: -> %d, num_in_q=%d, reason: queue full\n",
|
|
__func__, qdepth, num_in_q);
|
|
else {
|
|
const char *cp;
|
|
|
|
switch (reason) {
|
|
case SCSI_QDEPTH_DEFAULT:
|
|
cp = "default (sysfs ?)";
|
|
break;
|
|
case SCSI_QDEPTH_RAMP_UP:
|
|
cp = "ramp up";
|
|
break;
|
|
default:
|
|
cp = "unknown";
|
|
break;
|
|
}
|
|
sdev_printk(KERN_INFO, sdev,
|
|
"%s: qdepth=%d, num_in_q=%d, reason: %s\n",
|
|
__func__, qdepth, num_in_q, cp);
|
|
}
|
|
}
|
|
return sdev->queue_depth;
|
|
}
|
|
|
|
static int
|
|
sdebug_change_qtype(struct scsi_device *sdev, int qtype)
|
|
{
|
|
if (sdev->tagged_supported) {
|
|
scsi_set_tag_type(sdev, qtype);
|
|
if (qtype)
|
|
scsi_activate_tcq(sdev, sdev->queue_depth);
|
|
else
|
|
scsi_deactivate_tcq(sdev, sdev->queue_depth);
|
|
} else
|
|
qtype = 0;
|
|
if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) {
|
|
const char *cp;
|
|
|
|
switch (qtype) {
|
|
case 0:
|
|
cp = "untagged";
|
|
break;
|
|
case MSG_SIMPLE_TAG:
|
|
cp = "simple tags";
|
|
break;
|
|
case MSG_ORDERED_TAG:
|
|
cp = "ordered tags";
|
|
break;
|
|
default:
|
|
cp = "unknown";
|
|
break;
|
|
}
|
|
sdev_printk(KERN_INFO, sdev, "%s: to %s\n", __func__, cp);
|
|
}
|
|
return qtype;
|
|
}
|
|
|
|
static struct scsi_host_template sdebug_driver_template = {
|
|
.show_info = scsi_debug_show_info,
|
|
.write_info = scsi_debug_write_info,
|
|
.proc_name = sdebug_proc_name,
|
|
.name = "SCSI DEBUG",
|
|
.info = scsi_debug_info,
|
|
.slave_alloc = scsi_debug_slave_alloc,
|
|
.slave_configure = scsi_debug_slave_configure,
|
|
.slave_destroy = scsi_debug_slave_destroy,
|
|
.ioctl = scsi_debug_ioctl,
|
|
.queuecommand = sdebug_queuecommand_lock_or_not,
|
|
.change_queue_depth = sdebug_change_qdepth,
|
|
.change_queue_type = sdebug_change_qtype,
|
|
.eh_abort_handler = scsi_debug_abort,
|
|
.eh_device_reset_handler = scsi_debug_device_reset,
|
|
.eh_target_reset_handler = scsi_debug_target_reset,
|
|
.eh_bus_reset_handler = scsi_debug_bus_reset,
|
|
.eh_host_reset_handler = scsi_debug_host_reset,
|
|
.can_queue = SCSI_DEBUG_CANQUEUE,
|
|
.this_id = 7,
|
|
.sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS,
|
|
.cmd_per_lun = DEF_CMD_PER_LUN,
|
|
.max_sectors = -1U,
|
|
.use_clustering = DISABLE_CLUSTERING,
|
|
.module = THIS_MODULE,
|
|
};
|
|
|
|
static int sdebug_driver_probe(struct device * dev)
|
|
{
|
|
int error = 0;
|
|
struct sdebug_host_info *sdbg_host;
|
|
struct Scsi_Host *hpnt;
|
|
int host_prot;
|
|
|
|
sdbg_host = to_sdebug_host(dev);
|
|
|
|
sdebug_driver_template.can_queue = scsi_debug_max_queue;
|
|
if (scsi_debug_clustering)
|
|
sdebug_driver_template.use_clustering = ENABLE_CLUSTERING;
|
|
hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
|
|
if (NULL == hpnt) {
|
|
printk(KERN_ERR "%s: scsi_register failed\n", __func__);
|
|
error = -ENODEV;
|
|
return error;
|
|
}
|
|
|
|
sdbg_host->shost = hpnt;
|
|
*((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
|
|
if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id))
|
|
hpnt->max_id = scsi_debug_num_tgts + 1;
|
|
else
|
|
hpnt->max_id = scsi_debug_num_tgts;
|
|
hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* = scsi_debug_max_luns; */
|
|
|
|
host_prot = 0;
|
|
|
|
switch (scsi_debug_dif) {
|
|
|
|
case SD_DIF_TYPE1_PROTECTION:
|
|
host_prot = SHOST_DIF_TYPE1_PROTECTION;
|
|
if (scsi_debug_dix)
|
|
host_prot |= SHOST_DIX_TYPE1_PROTECTION;
|
|
break;
|
|
|
|
case SD_DIF_TYPE2_PROTECTION:
|
|
host_prot = SHOST_DIF_TYPE2_PROTECTION;
|
|
if (scsi_debug_dix)
|
|
host_prot |= SHOST_DIX_TYPE2_PROTECTION;
|
|
break;
|
|
|
|
case SD_DIF_TYPE3_PROTECTION:
|
|
host_prot = SHOST_DIF_TYPE3_PROTECTION;
|
|
if (scsi_debug_dix)
|
|
host_prot |= SHOST_DIX_TYPE3_PROTECTION;
|
|
break;
|
|
|
|
default:
|
|
if (scsi_debug_dix)
|
|
host_prot |= SHOST_DIX_TYPE0_PROTECTION;
|
|
break;
|
|
}
|
|
|
|
scsi_host_set_prot(hpnt, host_prot);
|
|
|
|
printk(KERN_INFO "scsi_debug: host protection%s%s%s%s%s%s%s\n",
|
|
(host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
|
|
(host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
|
|
(host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
|
|
(host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
|
|
(host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
|
|
(host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
|
|
(host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
|
|
|
|
if (scsi_debug_guard == 1)
|
|
scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
|
|
else
|
|
scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
|
|
|
|
error = scsi_add_host(hpnt, &sdbg_host->dev);
|
|
if (error) {
|
|
printk(KERN_ERR "%s: scsi_add_host failed\n", __func__);
|
|
error = -ENODEV;
|
|
scsi_host_put(hpnt);
|
|
} else
|
|
scsi_scan_host(hpnt);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int sdebug_driver_remove(struct device * dev)
|
|
{
|
|
struct sdebug_host_info *sdbg_host;
|
|
struct sdebug_dev_info *sdbg_devinfo, *tmp;
|
|
|
|
sdbg_host = to_sdebug_host(dev);
|
|
|
|
if (!sdbg_host) {
|
|
printk(KERN_ERR "%s: Unable to locate host info\n",
|
|
__func__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
scsi_remove_host(sdbg_host->shost);
|
|
|
|
list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
|
|
dev_list) {
|
|
list_del(&sdbg_devinfo->dev_list);
|
|
kfree(sdbg_devinfo);
|
|
}
|
|
|
|
scsi_host_put(sdbg_host->shost);
|
|
return 0;
|
|
}
|
|
|
|
static int pseudo_lld_bus_match(struct device *dev,
|
|
struct device_driver *dev_driver)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static struct bus_type pseudo_lld_bus = {
|
|
.name = "pseudo",
|
|
.match = pseudo_lld_bus_match,
|
|
.probe = sdebug_driver_probe,
|
|
.remove = sdebug_driver_remove,
|
|
.drv_groups = sdebug_drv_groups,
|
|
};
|