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1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
1977 lines
59 KiB
C
1977 lines
59 KiB
C
/*
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* linux/kernel/scsi_debug.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
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*
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*
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* For documentation see http://www.torque.net/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/config.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/errno.h>
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#include <linux/timer.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/smp_lock.h>
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#include <linux/vmalloc.h>
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#include <linux/moduleparam.h>
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#include <linux/blkdev.h>
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#include "scsi.h"
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#include <scsi/scsi_host.h>
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#include <scsi/scsicam.h>
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#include <linux/stat.h>
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#ifndef LINUX_VERSION_CODE
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#include <linux/version.h>
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#endif
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#include "scsi_logging.h"
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#include "scsi_debug.h"
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#define SCSI_DEBUG_VERSION "1.75"
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static const char * scsi_debug_version_date = "20050113";
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/* Additional Sense Code (ASC) used */
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#define NO_ADDED_SENSE 0x0
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#define UNRECOVERED_READ_ERR 0x11
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#define INVALID_OPCODE 0x20
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#define ADDR_OUT_OF_RANGE 0x21
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#define INVALID_FIELD_IN_CDB 0x24
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#define POWERON_RESET 0x29
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#define SAVING_PARAMS_UNSUP 0x39
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#define THRESHHOLD_EXCEEDED 0x5d
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#define SDEBUG_TAGGED_QUEUING 0 /* 0 | MSG_SIMPLE_TAG | MSG_ORDERED_TAG */
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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_DELAY 1
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#define DEF_DEV_SIZE_MB 8
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#define DEF_EVERY_NTH 0
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#define DEF_NUM_PARTS 0
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#define DEF_OPTS 0
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#define DEF_SCSI_LEVEL 5 /* INQUIRY, byte2 [5->SPC-3] */
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#define DEF_PTYPE 0
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#define DEF_D_SENSE 0
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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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/* 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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*
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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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* 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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/* 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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/* 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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static int scsi_debug_add_host = DEF_NUM_HOST;
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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_every_nth = DEF_EVERY_NTH;
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static int scsi_debug_max_luns = DEF_MAX_LUNS;
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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_opts = DEF_OPTS;
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static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
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static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
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static int scsi_debug_dsense = DEF_D_SENSE;
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static int scsi_debug_cmnd_count = 0;
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#define DEV_READONLY(TGT) (0)
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#define DEV_REMOVEABLE(TGT) (0)
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static unsigned long sdebug_store_size; /* in bytes */
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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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/* default sector size is 512 bytes, 2**9 bytes */
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#define POW2_SECT_SIZE 9
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#define SECT_SIZE (1 << POW2_SECT_SIZE)
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#define SECT_SIZE_PER(TGT) SECT_SIZE
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#define SDEBUG_MAX_PARTS 4
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#define SDEBUG_SENSE_LEN 32
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struct sdebug_dev_info {
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struct list_head dev_list;
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unsigned char sense_buff[SDEBUG_SENSE_LEN]; /* weak nexus */
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unsigned int channel;
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unsigned int target;
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unsigned int lun;
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struct sdebug_host_info *sdbg_host;
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char reset;
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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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typedef void (* done_funct_t) (struct scsi_cmnd *);
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struct sdebug_queued_cmd {
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int in_use;
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struct timer_list cmnd_timer;
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done_funct_t done_funct;
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struct scsi_cmnd * a_cmnd;
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int scsi_result;
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};
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static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
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static Scsi_Host_Template sdebug_driver_template = {
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.proc_info = scsi_debug_proc_info,
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.name = "SCSI DEBUG",
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.info = scsi_debug_info,
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.slave_alloc = scsi_debug_slave_alloc,
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.slave_configure = scsi_debug_slave_configure,
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.slave_destroy = scsi_debug_slave_destroy,
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.ioctl = scsi_debug_ioctl,
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.queuecommand = scsi_debug_queuecommand,
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.eh_abort_handler = scsi_debug_abort,
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.eh_bus_reset_handler = scsi_debug_bus_reset,
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.eh_device_reset_handler = scsi_debug_device_reset,
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.eh_host_reset_handler = scsi_debug_host_reset,
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.bios_param = scsi_debug_biosparam,
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.can_queue = SCSI_DEBUG_CANQUEUE,
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.this_id = 7,
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.sg_tablesize = 64,
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.cmd_per_lun = 3,
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.max_sectors = 4096,
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.unchecked_isa_dma = 0,
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.use_clustering = DISABLE_CLUSTERING,
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.module = THIS_MODULE,
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};
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static unsigned char * fake_storep; /* ramdisk storage */
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static int num_aborts = 0;
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static int num_dev_resets = 0;
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static int num_bus_resets = 0;
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static int num_host_resets = 0;
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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[] = "scsi_debug";
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static int sdebug_driver_probe(struct device *);
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static int sdebug_driver_remove(struct device *);
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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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.probe = sdebug_driver_probe,
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.remove = sdebug_driver_remove,
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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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/* function declarations */
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static int resp_inquiry(struct scsi_cmnd * SCpnt, int target,
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struct sdebug_dev_info * devip);
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static int resp_requests(struct scsi_cmnd * SCpnt,
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struct sdebug_dev_info * devip);
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static int resp_readcap(struct scsi_cmnd * SCpnt,
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struct sdebug_dev_info * devip);
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static int resp_mode_sense(struct scsi_cmnd * SCpnt, int target,
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struct sdebug_dev_info * devip);
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static int resp_read(struct scsi_cmnd * SCpnt, int upper_blk, int block,
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int num, struct sdebug_dev_info * devip);
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static int resp_write(struct scsi_cmnd * SCpnt, int upper_blk, int block,
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int num, struct sdebug_dev_info * devip);
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static int resp_report_luns(struct scsi_cmnd * SCpnt,
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struct sdebug_dev_info * devip);
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static int fill_from_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr,
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int arr_len);
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static int fetch_to_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr,
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int max_arr_len);
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static void timer_intr_handler(unsigned long);
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static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev);
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static void mk_sense_buffer(struct sdebug_dev_info * devip, int key,
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int asc, int asq);
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static int check_reset(struct scsi_cmnd * SCpnt,
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struct sdebug_dev_info * devip);
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static int schedule_resp(struct scsi_cmnd * cmnd,
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struct sdebug_dev_info * devip,
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done_funct_t done, int scsi_result, int delta_jiff);
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static void __init sdebug_build_parts(unsigned char * ramp);
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static void __init init_all_queued(void);
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static void stop_all_queued(void);
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static int stop_queued_cmnd(struct scsi_cmnd * cmnd);
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static int inquiry_evpd_83(unsigned char * arr, int dev_id_num,
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const char * dev_id_str, int dev_id_str_len);
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static void do_create_driverfs_files(void);
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static void do_remove_driverfs_files(void);
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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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static struct device pseudo_primary;
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static struct bus_type pseudo_lld_bus;
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static
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int scsi_debug_queuecommand(struct scsi_cmnd * SCpnt, done_funct_t done)
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{
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unsigned char *cmd = (unsigned char *) SCpnt->cmnd;
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int block, upper_blk, num, k;
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int errsts = 0;
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int target = SCpnt->device->id;
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struct sdebug_dev_info * devip = NULL;
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int inj_recovered = 0;
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if (done == NULL)
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return 0; /* assume mid level reprocessing command */
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if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmd) {
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printk(KERN_INFO "scsi_debug: cmd ");
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for (k = 0, num = SCpnt->cmd_len; k < num; ++k)
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printk("%02x ", (int)cmd[k]);
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printk("\n");
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}
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if(target == sdebug_driver_template.this_id) {
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printk(KERN_INFO "scsi_debug: initiator's id used as "
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"target!\n");
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return schedule_resp(SCpnt, NULL, done,
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DID_NO_CONNECT << 16, 0);
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}
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if (SCpnt->device->lun >= scsi_debug_max_luns)
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return schedule_resp(SCpnt, NULL, done,
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DID_NO_CONNECT << 16, 0);
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devip = devInfoReg(SCpnt->device);
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if (NULL == devip)
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return schedule_resp(SCpnt, NULL, done,
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DID_NO_CONNECT << 16, 0);
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if ((scsi_debug_every_nth != 0) &&
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(++scsi_debug_cmnd_count >= abs(scsi_debug_every_nth))) {
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scsi_debug_cmnd_count = 0;
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if (scsi_debug_every_nth < -1)
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scsi_debug_every_nth = -1;
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if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
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return 0; /* ignore command causing timeout */
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else if (SCSI_DEBUG_OPT_RECOVERED_ERR & scsi_debug_opts)
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inj_recovered = 1; /* to reads and writes below */
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}
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switch (*cmd) {
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case INQUIRY: /* mandatory, ignore unit attention */
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errsts = resp_inquiry(SCpnt, target, devip);
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break;
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case REQUEST_SENSE: /* mandatory, ignore unit attention */
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errsts = resp_requests(SCpnt, devip);
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break;
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case REZERO_UNIT: /* actually this is REWIND for SSC */
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case START_STOP:
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errsts = check_reset(SCpnt, devip);
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break;
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case ALLOW_MEDIUM_REMOVAL:
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if ((errsts = check_reset(SCpnt, devip)))
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break;
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if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
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printk(KERN_INFO "scsi_debug: Medium removal %s\n",
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cmd[4] ? "inhibited" : "enabled");
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break;
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case SEND_DIAGNOSTIC: /* mandatory */
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errsts = check_reset(SCpnt, devip);
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break;
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case TEST_UNIT_READY: /* mandatory */
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errsts = check_reset(SCpnt, devip);
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break;
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case RESERVE:
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errsts = check_reset(SCpnt, devip);
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break;
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case RESERVE_10:
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errsts = check_reset(SCpnt, devip);
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break;
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case RELEASE:
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errsts = check_reset(SCpnt, devip);
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break;
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case RELEASE_10:
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errsts = check_reset(SCpnt, devip);
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break;
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case READ_CAPACITY:
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errsts = resp_readcap(SCpnt, devip);
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break;
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case READ_16:
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case READ_12:
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case READ_10:
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case READ_6:
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if ((errsts = check_reset(SCpnt, devip)))
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break;
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upper_blk = 0;
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if ((*cmd) == READ_16) {
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upper_blk = cmd[5] + (cmd[4] << 8) +
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(cmd[3] << 16) + (cmd[2] << 24);
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block = cmd[9] + (cmd[8] << 8) +
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(cmd[7] << 16) + (cmd[6] << 24);
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num = cmd[13] + (cmd[12] << 8) +
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(cmd[11] << 16) + (cmd[10] << 24);
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} else if ((*cmd) == READ_12) {
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block = cmd[5] + (cmd[4] << 8) +
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(cmd[3] << 16) + (cmd[2] << 24);
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num = cmd[9] + (cmd[8] << 8) +
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(cmd[7] << 16) + (cmd[6] << 24);
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} else if ((*cmd) == READ_10) {
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block = cmd[5] + (cmd[4] << 8) +
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(cmd[3] << 16) + (cmd[2] << 24);
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num = cmd[8] + (cmd[7] << 8);
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} else {
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block = cmd[3] + (cmd[2] << 8) +
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((cmd[1] & 0x1f) << 16);
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num = cmd[4];
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}
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errsts = resp_read(SCpnt, upper_blk, block, num, devip);
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if (inj_recovered && (0 == errsts)) {
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mk_sense_buffer(devip, RECOVERED_ERROR,
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THRESHHOLD_EXCEEDED, 0);
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errsts = check_condition_result;
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}
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break;
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case REPORT_LUNS: /* mandatory, ignore unit attention */
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errsts = resp_report_luns(SCpnt, devip);
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break;
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case VERIFY: /* 10 byte SBC-2 command */
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errsts = check_reset(SCpnt, devip);
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break;
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case WRITE_16:
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case WRITE_12:
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case WRITE_10:
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case WRITE_6:
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if ((errsts = check_reset(SCpnt, devip)))
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break;
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upper_blk = 0;
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if ((*cmd) == WRITE_16) {
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upper_blk = cmd[5] + (cmd[4] << 8) +
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(cmd[3] << 16) + (cmd[2] << 24);
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block = cmd[9] + (cmd[8] << 8) +
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(cmd[7] << 16) + (cmd[6] << 24);
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num = cmd[13] + (cmd[12] << 8) +
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(cmd[11] << 16) + (cmd[10] << 24);
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} else if ((*cmd) == WRITE_12) {
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block = cmd[5] + (cmd[4] << 8) +
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(cmd[3] << 16) + (cmd[2] << 24);
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num = cmd[9] + (cmd[8] << 8) +
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(cmd[7] << 16) + (cmd[6] << 24);
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} else if ((*cmd) == WRITE_10) {
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block = cmd[5] + (cmd[4] << 8) +
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(cmd[3] << 16) + (cmd[2] << 24);
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num = cmd[8] + (cmd[7] << 8);
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} else {
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block = cmd[3] + (cmd[2] << 8) +
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((cmd[1] & 0x1f) << 16);
|
|
num = cmd[4];
|
|
}
|
|
errsts = resp_write(SCpnt, upper_blk, block, num, devip);
|
|
if (inj_recovered && (0 == errsts)) {
|
|
mk_sense_buffer(devip, RECOVERED_ERROR,
|
|
THRESHHOLD_EXCEEDED, 0);
|
|
errsts = check_condition_result;
|
|
}
|
|
break;
|
|
case MODE_SENSE:
|
|
case MODE_SENSE_10:
|
|
errsts = resp_mode_sense(SCpnt, target, devip);
|
|
break;
|
|
case SYNCHRONIZE_CACHE:
|
|
errsts = check_reset(SCpnt, devip);
|
|
break;
|
|
default:
|
|
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
|
|
printk(KERN_INFO "scsi_debug: Opcode: 0x%x not "
|
|
"supported\n", *cmd);
|
|
if ((errsts = check_reset(SCpnt, devip)))
|
|
break; /* Unit attention takes precedence */
|
|
mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
|
|
errsts = check_condition_result;
|
|
break;
|
|
}
|
|
return schedule_resp(SCpnt, devip, done, errsts, scsi_debug_delay);
|
|
}
|
|
|
|
static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
|
|
{
|
|
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
|
|
printk(KERN_INFO "scsi_debug: ioctl: cmd=0x%x\n", cmd);
|
|
}
|
|
return -EINVAL;
|
|
/* return -ENOTTY; // correct return but upsets fdisk */
|
|
}
|
|
|
|
static int check_reset(struct scsi_cmnd * SCpnt, struct sdebug_dev_info * devip)
|
|
{
|
|
if (devip->reset) {
|
|
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
|
|
printk(KERN_INFO "scsi_debug: Reporting Unit "
|
|
"attention: power on reset\n");
|
|
devip->reset = 0;
|
|
mk_sense_buffer(devip, UNIT_ATTENTION, POWERON_RESET, 0);
|
|
return check_condition_result;
|
|
}
|
|
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 k, req_len, act_len, len, active;
|
|
void * kaddr;
|
|
void * kaddr_off;
|
|
struct scatterlist * sgpnt;
|
|
|
|
if (0 == scp->request_bufflen)
|
|
return 0;
|
|
if (NULL == scp->request_buffer)
|
|
return (DID_ERROR << 16);
|
|
if (! ((scp->sc_data_direction == DMA_BIDIRECTIONAL) ||
|
|
(scp->sc_data_direction == DMA_FROM_DEVICE)))
|
|
return (DID_ERROR << 16);
|
|
if (0 == scp->use_sg) {
|
|
req_len = scp->request_bufflen;
|
|
act_len = (req_len < arr_len) ? req_len : arr_len;
|
|
memcpy(scp->request_buffer, arr, act_len);
|
|
scp->resid = req_len - act_len;
|
|
return 0;
|
|
}
|
|
sgpnt = (struct scatterlist *)scp->request_buffer;
|
|
active = 1;
|
|
for (k = 0, req_len = 0, act_len = 0; k < scp->use_sg; ++k, ++sgpnt) {
|
|
if (active) {
|
|
kaddr = (unsigned char *)
|
|
kmap_atomic(sgpnt->page, KM_USER0);
|
|
if (NULL == kaddr)
|
|
return (DID_ERROR << 16);
|
|
kaddr_off = (unsigned char *)kaddr + sgpnt->offset;
|
|
len = sgpnt->length;
|
|
if ((req_len + len) > arr_len) {
|
|
active = 0;
|
|
len = arr_len - req_len;
|
|
}
|
|
memcpy(kaddr_off, arr + req_len, len);
|
|
kunmap_atomic(kaddr, KM_USER0);
|
|
act_len += len;
|
|
}
|
|
req_len += sgpnt->length;
|
|
}
|
|
scp->resid = req_len - 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 max_arr_len)
|
|
{
|
|
int k, req_len, len, fin;
|
|
void * kaddr;
|
|
void * kaddr_off;
|
|
struct scatterlist * sgpnt;
|
|
|
|
if (0 == scp->request_bufflen)
|
|
return 0;
|
|
if (NULL == scp->request_buffer)
|
|
return -1;
|
|
if (! ((scp->sc_data_direction == DMA_BIDIRECTIONAL) ||
|
|
(scp->sc_data_direction == DMA_TO_DEVICE)))
|
|
return -1;
|
|
if (0 == scp->use_sg) {
|
|
req_len = scp->request_bufflen;
|
|
len = (req_len < max_arr_len) ? req_len : max_arr_len;
|
|
memcpy(arr, scp->request_buffer, len);
|
|
return len;
|
|
}
|
|
sgpnt = (struct scatterlist *)scp->request_buffer;
|
|
for (k = 0, req_len = 0, fin = 0; k < scp->use_sg; ++k, ++sgpnt) {
|
|
kaddr = (unsigned char *)kmap_atomic(sgpnt->page, KM_USER0);
|
|
if (NULL == kaddr)
|
|
return -1;
|
|
kaddr_off = (unsigned char *)kaddr + sgpnt->offset;
|
|
len = sgpnt->length;
|
|
if ((req_len + len) > max_arr_len) {
|
|
len = max_arr_len - req_len;
|
|
fin = 1;
|
|
}
|
|
memcpy(arr + req_len, kaddr_off, len);
|
|
kunmap_atomic(kaddr, KM_USER0);
|
|
if (fin)
|
|
return req_len + len;
|
|
req_len += sgpnt->length;
|
|
}
|
|
return req_len;
|
|
}
|
|
|
|
|
|
static const char * inq_vendor_id = "Linux ";
|
|
static const char * inq_product_id = "scsi_debug ";
|
|
static const char * inq_product_rev = "0004";
|
|
|
|
static int inquiry_evpd_83(unsigned char * arr, int dev_id_num,
|
|
const char * dev_id_str, int dev_id_str_len)
|
|
{
|
|
int num;
|
|
|
|
/* Two identification descriptors: */
|
|
/* 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;
|
|
/* NAA IEEE registered identifier (faked) */
|
|
arr[num] = 0x1; /* binary */
|
|
arr[num + 1] = 0x3;
|
|
arr[num + 2] = 0x0;
|
|
arr[num + 3] = 0x8;
|
|
arr[num + 4] = 0x51; /* ieee company id=0x123456 (faked) */
|
|
arr[num + 5] = 0x23;
|
|
arr[num + 6] = 0x45;
|
|
arr[num + 7] = 0x60;
|
|
arr[num + 8] = (dev_id_num >> 24);
|
|
arr[num + 9] = (dev_id_num >> 16) & 0xff;
|
|
arr[num + 10] = (dev_id_num >> 8) & 0xff;
|
|
arr[num + 11] = dev_id_num & 0xff;
|
|
return num + 12;
|
|
}
|
|
|
|
|
|
#define SDEBUG_LONG_INQ_SZ 96
|
|
#define SDEBUG_MAX_INQ_ARR_SZ 128
|
|
|
|
static int resp_inquiry(struct scsi_cmnd * scp, int target,
|
|
struct sdebug_dev_info * devip)
|
|
{
|
|
unsigned char pq_pdt;
|
|
unsigned char arr[SDEBUG_MAX_INQ_ARR_SZ];
|
|
unsigned char *cmd = (unsigned char *)scp->cmnd;
|
|
int alloc_len;
|
|
|
|
alloc_len = (cmd[3] << 8) + cmd[4];
|
|
memset(arr, 0, SDEBUG_MAX_INQ_ARR_SZ);
|
|
pq_pdt = (scsi_debug_ptype & 0x1f);
|
|
arr[0] = pq_pdt;
|
|
if (0x2 & cmd[1]) { /* CMDDT bit set */
|
|
mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
|
|
0);
|
|
return check_condition_result;
|
|
} else if (0x1 & cmd[1]) { /* EVPD bit set */
|
|
int dev_id_num, len;
|
|
char dev_id_str[6];
|
|
|
|
dev_id_num = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
|
|
(devip->target * 1000) + devip->lun;
|
|
len = scnprintf(dev_id_str, 6, "%d", dev_id_num);
|
|
if (0 == cmd[2]) { /* supported vital product data pages */
|
|
arr[3] = 3;
|
|
arr[4] = 0x0; /* this page */
|
|
arr[5] = 0x80; /* unit serial number */
|
|
arr[6] = 0x83; /* device identification */
|
|
} else if (0x80 == cmd[2]) { /* unit serial number */
|
|
arr[1] = 0x80;
|
|
arr[3] = len;
|
|
memcpy(&arr[4], dev_id_str, len);
|
|
} else if (0x83 == cmd[2]) { /* device identification */
|
|
arr[1] = 0x83;
|
|
arr[3] = inquiry_evpd_83(&arr[4], dev_id_num,
|
|
dev_id_str, len);
|
|
} else {
|
|
/* Illegal request, invalid field in cdb */
|
|
mk_sense_buffer(devip, ILLEGAL_REQUEST,
|
|
INVALID_FIELD_IN_CDB, 0);
|
|
return check_condition_result;
|
|
}
|
|
return fill_from_dev_buffer(scp, arr,
|
|
min(alloc_len, SDEBUG_MAX_INQ_ARR_SZ));
|
|
}
|
|
/* drops through here for a standard inquiry */
|
|
arr[1] = DEV_REMOVEABLE(target) ? 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[6] = 0x1; /* claim: ADDR16 */
|
|
/* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
|
|
arr[7] = 0x3a; /* claim: WBUS16, SYNC, 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] = 0x40; /* SAM-2 */
|
|
arr[60] = 0x3; arr[61] = 0x0; /* SPC-3 */
|
|
if (scsi_debug_ptype == 0) {
|
|
arr[62] = 0x1; arr[63] = 0x80; /* SBC */
|
|
} else if (scsi_debug_ptype == 1) {
|
|
arr[62] = 0x2; arr[63] = 0x00; /* SSC */
|
|
}
|
|
return fill_from_dev_buffer(scp, arr,
|
|
min(alloc_len, SDEBUG_LONG_INQ_SZ));
|
|
}
|
|
|
|
static int resp_requests(struct scsi_cmnd * scp,
|
|
struct sdebug_dev_info * devip)
|
|
{
|
|
unsigned char * sbuff;
|
|
unsigned char *cmd = (unsigned char *)scp->cmnd;
|
|
unsigned char arr[SDEBUG_SENSE_LEN];
|
|
int len = 18;
|
|
|
|
memset(arr, 0, SDEBUG_SENSE_LEN);
|
|
if (devip->reset == 1)
|
|
mk_sense_buffer(devip, 0, NO_ADDED_SENSE, 0);
|
|
sbuff = devip->sense_buff;
|
|
if ((cmd[1] & 1) && (! scsi_debug_dsense)) {
|
|
/* DESC bit set and sense_buff in fixed format */
|
|
arr[0] = 0x72;
|
|
arr[1] = sbuff[2]; /* sense key */
|
|
arr[2] = sbuff[12]; /* asc */
|
|
arr[3] = sbuff[13]; /* ascq */
|
|
len = 8;
|
|
} else
|
|
memcpy(arr, sbuff, SDEBUG_SENSE_LEN);
|
|
mk_sense_buffer(devip, 0, NO_ADDED_SENSE, 0);
|
|
return fill_from_dev_buffer(scp, arr, len);
|
|
}
|
|
|
|
#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 long capac;
|
|
int errsts;
|
|
|
|
if ((errsts = check_reset(scp, devip)))
|
|
return errsts;
|
|
memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
|
|
capac = (unsigned long)sdebug_capacity - 1;
|
|
arr[0] = (capac >> 24);
|
|
arr[1] = (capac >> 16) & 0xff;
|
|
arr[2] = (capac >> 8) & 0xff;
|
|
arr[3] = capac & 0xff;
|
|
arr[6] = (SECT_SIZE_PER(target) >> 8) & 0xff;
|
|
arr[7] = SECT_SIZE_PER(target) & 0xff;
|
|
return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
|
|
}
|
|
|
|
/* <<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] = (SECT_SIZE >> 8) & 0xff;
|
|
p[13] = SECT_SIZE & 0xff;
|
|
if (DEV_REMOVEABLE(target))
|
|
p[20] |= 0x20; /* should agree with INQUIRY */
|
|
if (1 == pcontrol)
|
|
memset(p + 2, 0, sizeof(format_pg) - 2);
|
|
return sizeof(format_pg);
|
|
}
|
|
|
|
static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
|
|
{ /* Caching page for mode_sense */
|
|
unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
|
|
0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
|
|
|
|
memcpy(p, caching_pg, sizeof(caching_pg));
|
|
if (1 == pcontrol)
|
|
memset(p + 2, 0, sizeof(caching_pg) - 2);
|
|
return sizeof(caching_pg);
|
|
}
|
|
|
|
static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
|
|
{ /* Control mode page for mode_sense */
|
|
unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
|
|
0, 0, 0x2, 0x4b};
|
|
|
|
if (scsi_debug_dsense)
|
|
ctrl_m_pg[2] |= 0x4;
|
|
memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
|
|
if (1 == pcontrol)
|
|
memset(p + 2, 0, sizeof(ctrl_m_pg) - 2);
|
|
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 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)
|
|
memset(p + 2, 0, sizeof(iec_m_pg) - 2);
|
|
return sizeof(iec_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;
|
|
int pcontrol, pcode, subpcode;
|
|
unsigned char dev_spec;
|
|
int alloc_len, msense_6, offset, len, errsts;
|
|
unsigned char * ap;
|
|
unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
|
|
unsigned char *cmd = (unsigned char *)scp->cmnd;
|
|
|
|
if ((errsts = check_reset(scp, devip)))
|
|
return errsts;
|
|
dbd = cmd[1] & 0x8;
|
|
pcontrol = (cmd[2] & 0xc0) >> 6;
|
|
pcode = cmd[2] & 0x3f;
|
|
subpcode = cmd[3];
|
|
msense_6 = (MODE_SENSE == cmd[0]);
|
|
alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
|
|
memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
|
|
if (0x3 == pcontrol) { /* Saving values not supported */
|
|
mk_sense_buffer(devip, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP,
|
|
0);
|
|
return check_condition_result;
|
|
}
|
|
dev_spec = DEV_READONLY(target) ? 0x80 : 0x0;
|
|
if (msense_6) {
|
|
arr[2] = dev_spec;
|
|
offset = 4;
|
|
} else {
|
|
arr[3] = dev_spec;
|
|
offset = 8;
|
|
}
|
|
ap = arr + offset;
|
|
|
|
if (0 != subpcode) { /* TODO: Control Extension page */
|
|
mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
|
|
0);
|
|
return check_condition_result;
|
|
}
|
|
switch (pcode) {
|
|
case 0x1: /* Read-Write error recovery page, direct access */
|
|
len = resp_err_recov_pg(ap, pcontrol, target);
|
|
offset += len;
|
|
break;
|
|
case 0x2: /* Disconnect-Reconnect page, all devices */
|
|
len = resp_disconnect_pg(ap, pcontrol, target);
|
|
offset += len;
|
|
break;
|
|
case 0x3: /* Format device page, direct access */
|
|
len = resp_format_pg(ap, pcontrol, target);
|
|
offset += len;
|
|
break;
|
|
case 0x8: /* Caching page, direct access */
|
|
len = resp_caching_pg(ap, pcontrol, target);
|
|
offset += len;
|
|
break;
|
|
case 0xa: /* Control Mode page, all devices */
|
|
len = resp_ctrl_m_pg(ap, pcontrol, target);
|
|
offset += len;
|
|
break;
|
|
case 0x1c: /* Informational Exceptions Mode page, all devices */
|
|
len = resp_iec_m_pg(ap, pcontrol, target);
|
|
offset += len;
|
|
break;
|
|
case 0x3f: /* Read all Mode pages */
|
|
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_iec_m_pg(ap + len, pcontrol, target);
|
|
offset += len;
|
|
break;
|
|
default:
|
|
mk_sense_buffer(devip, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB,
|
|
0);
|
|
return check_condition_result;
|
|
}
|
|
if (msense_6)
|
|
arr[0] = offset - 1;
|
|
else {
|
|
arr[0] = ((offset - 2) >> 8) & 0xff;
|
|
arr[1] = (offset - 2) & 0xff;
|
|
}
|
|
return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
|
|
}
|
|
|
|
static int resp_read(struct scsi_cmnd * SCpnt, int upper_blk, int block,
|
|
int num, struct sdebug_dev_info * devip)
|
|
{
|
|
unsigned long iflags;
|
|
int ret;
|
|
|
|
if (upper_blk || (block + num > sdebug_capacity)) {
|
|
mk_sense_buffer(devip, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE,
|
|
0);
|
|
return check_condition_result;
|
|
}
|
|
if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
|
|
(block <= OPT_MEDIUM_ERR_ADDR) &&
|
|
((block + num) > OPT_MEDIUM_ERR_ADDR)) {
|
|
mk_sense_buffer(devip, MEDIUM_ERROR, UNRECOVERED_READ_ERR,
|
|
0);
|
|
/* claim unrecoverable read error */
|
|
return check_condition_result;
|
|
}
|
|
read_lock_irqsave(&atomic_rw, iflags);
|
|
ret = fill_from_dev_buffer(SCpnt, fake_storep + (block * SECT_SIZE),
|
|
num * SECT_SIZE);
|
|
read_unlock_irqrestore(&atomic_rw, iflags);
|
|
return ret;
|
|
}
|
|
|
|
static int resp_write(struct scsi_cmnd * SCpnt, int upper_blk, int block,
|
|
int num, struct sdebug_dev_info * devip)
|
|
{
|
|
unsigned long iflags;
|
|
int res;
|
|
|
|
if (upper_blk || (block + num > sdebug_capacity)) {
|
|
mk_sense_buffer(devip, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE,
|
|
0);
|
|
return check_condition_result;
|
|
}
|
|
|
|
write_lock_irqsave(&atomic_rw, iflags);
|
|
res = fetch_to_dev_buffer(SCpnt, fake_storep + (block * SECT_SIZE),
|
|
num * SECT_SIZE);
|
|
write_unlock_irqrestore(&atomic_rw, iflags);
|
|
if (-1 == res)
|
|
return (DID_ERROR << 16);
|
|
else if ((res < (num * SECT_SIZE)) &&
|
|
(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
|
|
printk(KERN_INFO "scsi_debug: write: cdb indicated=%d, "
|
|
" IO sent=%d bytes\n", num * SECT_SIZE, res);
|
|
return 0;
|
|
}
|
|
|
|
#define SDEBUG_RLUN_ARR_SZ 128
|
|
|
|
static int resp_report_luns(struct scsi_cmnd * scp,
|
|
struct sdebug_dev_info * devip)
|
|
{
|
|
unsigned int alloc_len;
|
|
int lun_cnt, i, upper;
|
|
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];
|
|
|
|
alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
|
|
if ((alloc_len < 16) || (select_report > 2)) {
|
|
mk_sense_buffer(devip, 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;
|
|
arr[2] = ((sizeof(struct scsi_lun) * lun_cnt) >> 8) & 0xff;
|
|
arr[3] = (sizeof(struct scsi_lun) * lun_cnt) & 0xff;
|
|
lun_cnt = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
|
|
sizeof(struct scsi_lun)), lun_cnt);
|
|
one_lun = (struct scsi_lun *) &arr[8];
|
|
for (i = 0; i < lun_cnt; i++) {
|
|
upper = (i >> 8) & 0x3f;
|
|
if (upper)
|
|
one_lun[i].scsi_lun[0] =
|
|
(upper | (SAM2_LUN_ADDRESS_METHOD << 6));
|
|
one_lun[i].scsi_lun[1] = i & 0xff;
|
|
}
|
|
return fill_from_dev_buffer(scp, arr,
|
|
min((int)alloc_len, SDEBUG_RLUN_ARR_SZ));
|
|
}
|
|
|
|
/* When timer goes off this function is called. */
|
|
static void timer_intr_handler(unsigned long indx)
|
|
{
|
|
struct sdebug_queued_cmd * sqcp;
|
|
unsigned long iflags;
|
|
|
|
if (indx >= SCSI_DEBUG_CANQUEUE) {
|
|
printk(KERN_ERR "scsi_debug:timer_intr_handler: indx too "
|
|
"large\n");
|
|
return;
|
|
}
|
|
spin_lock_irqsave(&queued_arr_lock, iflags);
|
|
sqcp = &queued_arr[(int)indx];
|
|
if (! sqcp->in_use) {
|
|
printk(KERN_ERR "scsi_debug:timer_intr_handler: Unexpected "
|
|
"interrupt\n");
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
return;
|
|
}
|
|
sqcp->in_use = 0;
|
|
if (sqcp->done_funct) {
|
|
sqcp->a_cmnd->result = sqcp->scsi_result;
|
|
sqcp->done_funct(sqcp->a_cmnd); /* callback to mid level */
|
|
}
|
|
sqcp->done_funct = NULL;
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
}
|
|
|
|
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 %u>\n",
|
|
sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
|
|
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 %u>\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);
|
|
sdp->hostdata = devip;
|
|
if (sdp->host->cmd_per_lun)
|
|
scsi_adjust_queue_depth(sdp, SDEBUG_TAGGED_QUEUING,
|
|
sdp->host->cmd_per_lun);
|
|
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 %u>\n",
|
|
sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
|
|
if (devip) {
|
|
/* make this slot avaliable for re-use */
|
|
devip->used = 0;
|
|
sdp->hostdata = NULL;
|
|
}
|
|
}
|
|
|
|
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 **) sdev->host->hostdata;
|
|
if(! sdbg_host) {
|
|
printk(KERN_ERR "Host info NULL\n");
|
|
return NULL;
|
|
}
|
|
list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
|
|
if ((devip->used) && (devip->channel == sdev->channel) &&
|
|
(devip->target == sdev->id) &&
|
|
(devip->lun == sdev->lun))
|
|
return devip;
|
|
else {
|
|
if ((!devip->used) && (!open_devip))
|
|
open_devip = devip;
|
|
}
|
|
}
|
|
if (NULL == open_devip) { /* try and make a new one */
|
|
open_devip = kmalloc(sizeof(*open_devip),GFP_KERNEL);
|
|
if (NULL == open_devip) {
|
|
printk(KERN_ERR "%s: out of memory at line %d\n",
|
|
__FUNCTION__, __LINE__);
|
|
return NULL;
|
|
}
|
|
memset(open_devip, 0, sizeof(*open_devip));
|
|
open_devip->sdbg_host = sdbg_host;
|
|
list_add_tail(&open_devip->dev_list,
|
|
&sdbg_host->dev_info_list);
|
|
}
|
|
if (open_devip) {
|
|
open_devip->channel = sdev->channel;
|
|
open_devip->target = sdev->id;
|
|
open_devip->lun = sdev->lun;
|
|
open_devip->sdbg_host = sdbg_host;
|
|
open_devip->reset = 1;
|
|
open_devip->used = 1;
|
|
memset(open_devip->sense_buff, 0, SDEBUG_SENSE_LEN);
|
|
if (scsi_debug_dsense)
|
|
open_devip->sense_buff[0] = 0x72;
|
|
else {
|
|
open_devip->sense_buff[0] = 0x70;
|
|
open_devip->sense_buff[7] = 0xa;
|
|
}
|
|
return open_devip;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static void mk_sense_buffer(struct sdebug_dev_info * devip, int key,
|
|
int asc, int asq)
|
|
{
|
|
unsigned char * sbuff;
|
|
|
|
sbuff = devip->sense_buff;
|
|
memset(sbuff, 0, SDEBUG_SENSE_LEN);
|
|
if (scsi_debug_dsense) {
|
|
sbuff[0] = 0x72; /* descriptor, current */
|
|
sbuff[1] = key;
|
|
sbuff[2] = asc;
|
|
sbuff[3] = asq;
|
|
} else {
|
|
sbuff[0] = 0x70; /* fixed, current */
|
|
sbuff[2] = key;
|
|
sbuff[7] = 0xa; /* implies 18 byte sense buffer */
|
|
sbuff[12] = asc;
|
|
sbuff[13] = asq;
|
|
}
|
|
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
|
|
printk(KERN_INFO "scsi_debug: [sense_key,asc,ascq]: "
|
|
"[0x%x,0x%x,0x%x]\n", key, asc, asq);
|
|
}
|
|
|
|
static int scsi_debug_abort(struct scsi_cmnd * SCpnt)
|
|
{
|
|
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
|
|
printk(KERN_INFO "scsi_debug: abort\n");
|
|
++num_aborts;
|
|
stop_queued_cmnd(SCpnt);
|
|
return SUCCESS;
|
|
}
|
|
|
|
static int scsi_debug_biosparam(struct scsi_device *sdev,
|
|
struct block_device * bdev, sector_t capacity, int *info)
|
|
{
|
|
int res;
|
|
unsigned char *buf;
|
|
|
|
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
|
|
printk(KERN_INFO "scsi_debug: biosparam\n");
|
|
buf = scsi_bios_ptable(bdev);
|
|
if (buf) {
|
|
res = scsi_partsize(buf, capacity,
|
|
&info[2], &info[0], &info[1]);
|
|
kfree(buf);
|
|
if (! res)
|
|
return res;
|
|
}
|
|
info[0] = sdebug_heads;
|
|
info[1] = sdebug_sectors_per;
|
|
info[2] = sdebug_cylinders_per;
|
|
return 0;
|
|
}
|
|
|
|
static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
|
|
{
|
|
struct sdebug_dev_info * devip;
|
|
|
|
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
|
|
printk(KERN_INFO "scsi_debug: device_reset\n");
|
|
++num_dev_resets;
|
|
if (SCpnt) {
|
|
devip = devInfoReg(SCpnt->device);
|
|
if (devip)
|
|
devip->reset = 1;
|
|
}
|
|
return SUCCESS;
|
|
}
|
|
|
|
static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
|
|
{
|
|
struct sdebug_host_info *sdbg_host;
|
|
struct sdebug_dev_info * dev_info;
|
|
struct scsi_device * sdp;
|
|
struct Scsi_Host * hp;
|
|
|
|
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
|
|
printk(KERN_INFO "scsi_debug: bus_reset\n");
|
|
++num_bus_resets;
|
|
if (SCpnt && ((sdp = SCpnt->device)) && ((hp = sdp->host))) {
|
|
sdbg_host = *(struct sdebug_host_info **) hp->hostdata;
|
|
if (sdbg_host) {
|
|
list_for_each_entry(dev_info,
|
|
&sdbg_host->dev_info_list,
|
|
dev_list)
|
|
dev_info->reset = 1;
|
|
}
|
|
}
|
|
return SUCCESS;
|
|
}
|
|
|
|
static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
|
|
{
|
|
struct sdebug_host_info * sdbg_host;
|
|
struct sdebug_dev_info * dev_info;
|
|
|
|
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
|
|
printk(KERN_INFO "scsi_debug: host_reset\n");
|
|
++num_host_resets;
|
|
spin_lock(&sdebug_host_list_lock);
|
|
list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
|
|
list_for_each_entry(dev_info, &sdbg_host->dev_info_list,
|
|
dev_list)
|
|
dev_info->reset = 1;
|
|
}
|
|
spin_unlock(&sdebug_host_list_lock);
|
|
stop_all_queued();
|
|
return SUCCESS;
|
|
}
|
|
|
|
/* Returns 1 if found 'cmnd' and deleted its timer. else returns 0 */
|
|
static int stop_queued_cmnd(struct scsi_cmnd * cmnd)
|
|
{
|
|
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];
|
|
if (sqcp->in_use && (cmnd == sqcp->a_cmnd)) {
|
|
del_timer_sync(&sqcp->cmnd_timer);
|
|
sqcp->in_use = 0;
|
|
sqcp->a_cmnd = NULL;
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
return (k < SCSI_DEBUG_CANQUEUE) ? 1 : 0;
|
|
}
|
|
|
|
/* Deletes (stops) timers of all queued commands */
|
|
static void stop_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];
|
|
if (sqcp->in_use && sqcp->a_cmnd) {
|
|
del_timer_sync(&sqcp->cmnd_timer);
|
|
sqcp->in_use = 0;
|
|
sqcp->a_cmnd = NULL;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
}
|
|
|
|
/* Initializes timers in queued array */
|
|
static void __init init_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];
|
|
init_timer(&sqcp->cmnd_timer);
|
|
sqcp->in_use = 0;
|
|
sqcp->a_cmnd = NULL;
|
|
}
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
}
|
|
|
|
static void __init sdebug_build_parts(unsigned char * ramp)
|
|
{
|
|
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) || (sdebug_store_size < 1048576))
|
|
return;
|
|
if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) {
|
|
scsi_debug_num_parts = SDEBUG_MAX_PARTS;
|
|
printk(KERN_WARNING "scsi_debug:build_parts: reducing "
|
|
"partitions to %d\n", SDEBUG_MAX_PARTS);
|
|
}
|
|
num_sectors = (int)(sdebug_store_size / SECT_SIZE);
|
|
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 = start_sec;
|
|
pp->nr_sects = 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,
|
|
done_funct_t done, int scsi_result, int delta_jiff)
|
|
{
|
|
if ((SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) && cmnd) {
|
|
if (scsi_result) {
|
|
struct scsi_device * sdp = cmnd->device;
|
|
|
|
printk(KERN_INFO "scsi_debug: <%u %u %u %u> "
|
|
"non-zero result=0x%x\n", sdp->host->host_no,
|
|
sdp->channel, sdp->id, sdp->lun, scsi_result);
|
|
}
|
|
}
|
|
if (cmnd && devip) {
|
|
/* simulate autosense by this driver */
|
|
if (SAM_STAT_CHECK_CONDITION == (scsi_result & 0xff))
|
|
memcpy(cmnd->sense_buffer, devip->sense_buff,
|
|
(SCSI_SENSE_BUFFERSIZE > SDEBUG_SENSE_LEN) ?
|
|
SDEBUG_SENSE_LEN : SCSI_SENSE_BUFFERSIZE);
|
|
}
|
|
if (delta_jiff <= 0) {
|
|
if (cmnd)
|
|
cmnd->result = scsi_result;
|
|
if (done)
|
|
done(cmnd);
|
|
return 0;
|
|
} else {
|
|
unsigned long iflags;
|
|
int k;
|
|
struct sdebug_queued_cmd * sqcp = NULL;
|
|
|
|
spin_lock_irqsave(&queued_arr_lock, iflags);
|
|
for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
|
|
sqcp = &queued_arr[k];
|
|
if (! sqcp->in_use)
|
|
break;
|
|
}
|
|
if (k >= SCSI_DEBUG_CANQUEUE) {
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
printk(KERN_WARNING "scsi_debug: can_queue exceeded\n");
|
|
return 1; /* report busy to mid level */
|
|
}
|
|
sqcp->in_use = 1;
|
|
sqcp->a_cmnd = cmnd;
|
|
sqcp->scsi_result = scsi_result;
|
|
sqcp->done_funct = done;
|
|
sqcp->cmnd_timer.function = timer_intr_handler;
|
|
sqcp->cmnd_timer.data = k;
|
|
sqcp->cmnd_timer.expires = jiffies + delta_jiff;
|
|
add_timer(&sqcp->cmnd_timer);
|
|
spin_unlock_irqrestore(&queued_arr_lock, iflags);
|
|
if (cmnd)
|
|
cmnd->result = 0;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Set 'perm' (4th argument) to 0 to disable module_param's definition
|
|
* of sysfs parameters (which module_param doesn't yet support).
|
|
* Sysfs parameters defined explicitly below.
|
|
*/
|
|
module_param_named(add_host, scsi_debug_add_host, int, 0); /* perm=0644 */
|
|
module_param_named(delay, scsi_debug_delay, int, 0); /* perm=0644 */
|
|
module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, 0);
|
|
module_param_named(dsense, scsi_debug_dsense, int, 0);
|
|
module_param_named(every_nth, scsi_debug_every_nth, int, 0);
|
|
module_param_named(max_luns, scsi_debug_max_luns, int, 0);
|
|
module_param_named(num_parts, scsi_debug_num_parts, int, 0);
|
|
module_param_named(num_tgts, scsi_debug_num_tgts, int, 0);
|
|
module_param_named(opts, scsi_debug_opts, int, 0); /* perm=0644 */
|
|
module_param_named(ptype, scsi_debug_ptype, int, 0);
|
|
module_param_named(scsi_level, scsi_debug_scsi_level, int, 0);
|
|
|
|
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(delay, "# of jiffies to delay response(def=1)");
|
|
MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs");
|
|
MODULE_PARM_DESC(dsense, "use descriptor sense format(def: fixed)");
|
|
MODULE_PARM_DESC(every_nth, "timeout every nth command(def=100)");
|
|
MODULE_PARM_DESC(max_luns, "number of SCSI LUNs per target to simulate");
|
|
MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
|
|
MODULE_PARM_DESC(num_tgts, "number of SCSI targets per host to simulate");
|
|
MODULE_PARM_DESC(opts, "1->noise, 2->medium_error, 4->...");
|
|
MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
|
|
MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])");
|
|
|
|
|
|
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;
|
|
}
|
|
|
|
/* scsi_debug_proc_info
|
|
* Used if the driver currently has no own support for /proc/scsi
|
|
*/
|
|
static int scsi_debug_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset,
|
|
int length, int inout)
|
|
{
|
|
int len, pos, begin;
|
|
int orig_length;
|
|
|
|
orig_length = length;
|
|
|
|
if (inout == 1) {
|
|
char arr[16];
|
|
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", &pos))
|
|
return -EINVAL;
|
|
scsi_debug_opts = pos;
|
|
if (scsi_debug_every_nth != 0)
|
|
scsi_debug_cmnd_count = 0;
|
|
return length;
|
|
}
|
|
begin = 0;
|
|
pos = len = sprintf(buffer, "scsi_debug adapter driver, version "
|
|
"%s [%s]\n"
|
|
"num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
|
|
"every_nth=%d(curr:%d)\n"
|
|
"delay=%d, max_luns=%d, scsi_level=%d\n"
|
|
"sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
|
|
"number of aborts=%d, device_reset=%d, bus_resets=%d, "
|
|
"host_resets=%d\n",
|
|
SCSI_DEBUG_VERSION, scsi_debug_version_date, scsi_debug_num_tgts,
|
|
scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth,
|
|
scsi_debug_cmnd_count, scsi_debug_delay,
|
|
scsi_debug_max_luns, scsi_debug_scsi_level,
|
|
SECT_SIZE, sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per,
|
|
num_aborts, num_dev_resets, num_bus_resets, num_host_resets);
|
|
if (pos < offset) {
|
|
len = 0;
|
|
begin = pos;
|
|
}
|
|
*start = buffer + (offset - begin); /* Start of wanted data */
|
|
len -= (offset - begin);
|
|
if (len > length)
|
|
len = length;
|
|
return len;
|
|
}
|
|
|
|
static ssize_t sdebug_delay_show(struct device_driver * ddp, char * buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
|
|
}
|
|
|
|
static ssize_t sdebug_delay_store(struct device_driver * ddp,
|
|
const char * buf, size_t count)
|
|
{
|
|
int delay;
|
|
char work[20];
|
|
|
|
if (1 == sscanf(buf, "%10s", work)) {
|
|
if ((1 == sscanf(work, "%d", &delay)) && (delay >= 0)) {
|
|
scsi_debug_delay = delay;
|
|
return count;
|
|
}
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
DRIVER_ATTR(delay, S_IRUGO | S_IWUSR, sdebug_delay_show,
|
|
sdebug_delay_store);
|
|
|
|
static ssize_t sdebug_opts_show(struct device_driver * ddp, char * buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
|
|
}
|
|
|
|
static ssize_t sdebug_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;
|
|
scsi_debug_cmnd_count = 0;
|
|
return count;
|
|
}
|
|
DRIVER_ATTR(opts, S_IRUGO | S_IWUSR, sdebug_opts_show,
|
|
sdebug_opts_store);
|
|
|
|
static ssize_t sdebug_ptype_show(struct device_driver * ddp, char * buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
|
|
}
|
|
static ssize_t sdebug_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;
|
|
}
|
|
DRIVER_ATTR(ptype, S_IRUGO | S_IWUSR, sdebug_ptype_show, sdebug_ptype_store);
|
|
|
|
static ssize_t sdebug_dsense_show(struct device_driver * ddp, char * buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
|
|
}
|
|
static ssize_t sdebug_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;
|
|
}
|
|
DRIVER_ATTR(dsense, S_IRUGO | S_IWUSR, sdebug_dsense_show,
|
|
sdebug_dsense_store);
|
|
|
|
static ssize_t sdebug_num_tgts_show(struct device_driver * ddp, char * buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
|
|
}
|
|
static ssize_t sdebug_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;
|
|
}
|
|
DRIVER_ATTR(num_tgts, S_IRUGO | S_IWUSR, sdebug_num_tgts_show,
|
|
sdebug_num_tgts_store);
|
|
|
|
static ssize_t sdebug_dev_size_mb_show(struct device_driver * ddp, char * buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
|
|
}
|
|
DRIVER_ATTR(dev_size_mb, S_IRUGO, sdebug_dev_size_mb_show, NULL);
|
|
|
|
static ssize_t sdebug_num_parts_show(struct device_driver * ddp, char * buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
|
|
}
|
|
DRIVER_ATTR(num_parts, S_IRUGO, sdebug_num_parts_show, NULL);
|
|
|
|
static ssize_t sdebug_every_nth_show(struct device_driver * ddp, char * buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
|
|
}
|
|
static ssize_t sdebug_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;
|
|
scsi_debug_cmnd_count = 0;
|
|
return count;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
DRIVER_ATTR(every_nth, S_IRUGO | S_IWUSR, sdebug_every_nth_show,
|
|
sdebug_every_nth_store);
|
|
|
|
static ssize_t sdebug_max_luns_show(struct device_driver * ddp, char * buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
|
|
}
|
|
static ssize_t sdebug_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;
|
|
}
|
|
DRIVER_ATTR(max_luns, S_IRUGO | S_IWUSR, sdebug_max_luns_show,
|
|
sdebug_max_luns_store);
|
|
|
|
static ssize_t sdebug_scsi_level_show(struct device_driver * ddp, char * buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
|
|
}
|
|
DRIVER_ATTR(scsi_level, S_IRUGO, sdebug_scsi_level_show, NULL);
|
|
|
|
static ssize_t sdebug_add_host_show(struct device_driver * ddp, char * buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
|
|
}
|
|
|
|
static ssize_t sdebug_add_host_store(struct device_driver * ddp,
|
|
const char * buf, size_t count)
|
|
{
|
|
int delta_hosts;
|
|
char work[20];
|
|
|
|
if (1 != sscanf(buf, "%10s", work))
|
|
return -EINVAL;
|
|
{ /* temporary hack around sscanf() problem with -ve nums */
|
|
int neg = 0;
|
|
|
|
if ('-' == *work)
|
|
neg = 1;
|
|
if (1 != sscanf(work + neg, "%d", &delta_hosts))
|
|
return -EINVAL;
|
|
if (neg)
|
|
delta_hosts = -delta_hosts;
|
|
}
|
|
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;
|
|
}
|
|
DRIVER_ATTR(add_host, S_IRUGO | S_IWUSR, sdebug_add_host_show,
|
|
sdebug_add_host_store);
|
|
|
|
static void do_create_driverfs_files(void)
|
|
{
|
|
driver_create_file(&sdebug_driverfs_driver, &driver_attr_add_host);
|
|
driver_create_file(&sdebug_driverfs_driver, &driver_attr_delay);
|
|
driver_create_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
|
|
driver_create_file(&sdebug_driverfs_driver, &driver_attr_dsense);
|
|
driver_create_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
|
|
driver_create_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
|
|
driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_tgts);
|
|
driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_parts);
|
|
driver_create_file(&sdebug_driverfs_driver, &driver_attr_ptype);
|
|
driver_create_file(&sdebug_driverfs_driver, &driver_attr_opts);
|
|
driver_create_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
|
|
}
|
|
|
|
static void do_remove_driverfs_files(void)
|
|
{
|
|
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_scsi_level);
|
|
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_opts);
|
|
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ptype);
|
|
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_parts);
|
|
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_tgts);
|
|
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_max_luns);
|
|
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_every_nth);
|
|
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dsense);
|
|
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dev_size_mb);
|
|
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_delay);
|
|
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_add_host);
|
|
}
|
|
|
|
static int __init scsi_debug_init(void)
|
|
{
|
|
unsigned long sz;
|
|
int host_to_add;
|
|
int k;
|
|
|
|
if (scsi_debug_dev_size_mb < 1)
|
|
scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
|
|
sdebug_store_size = (unsigned long)scsi_debug_dev_size_mb * 1048576;
|
|
sdebug_capacity = sdebug_store_size / SECT_SIZE;
|
|
|
|
/* 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);
|
|
}
|
|
|
|
sz = sdebug_store_size;
|
|
fake_storep = vmalloc(sz);
|
|
if (NULL == fake_storep) {
|
|
printk(KERN_ERR "scsi_debug_init: out of memory, 1\n");
|
|
return -ENOMEM;
|
|
}
|
|
memset(fake_storep, 0, sz);
|
|
if (scsi_debug_num_parts > 0)
|
|
sdebug_build_parts(fake_storep);
|
|
|
|
init_all_queued();
|
|
|
|
device_register(&pseudo_primary);
|
|
bus_register(&pseudo_lld_bus);
|
|
driver_register(&sdebug_driverfs_driver);
|
|
do_create_driverfs_files();
|
|
|
|
sdebug_driver_template.proc_name = (char *)sdebug_proc_name;
|
|
|
|
host_to_add = scsi_debug_add_host;
|
|
scsi_debug_add_host = 0;
|
|
|
|
for (k = 0; k < host_to_add; k++) {
|
|
if (sdebug_add_adapter()) {
|
|
printk(KERN_ERR "scsi_debug_init: "
|
|
"sdebug_add_adapter failed k=%d\n", k);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
|
|
printk(KERN_INFO "scsi_debug_init: built %d host(s)\n",
|
|
scsi_debug_add_host);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void __exit scsi_debug_exit(void)
|
|
{
|
|
int k = scsi_debug_add_host;
|
|
|
|
stop_all_queued();
|
|
for (; k; k--)
|
|
sdebug_remove_adapter();
|
|
do_remove_driverfs_files();
|
|
driver_unregister(&sdebug_driverfs_driver);
|
|
bus_unregister(&pseudo_lld_bus);
|
|
device_unregister(&pseudo_primary);
|
|
|
|
vfree(fake_storep);
|
|
}
|
|
|
|
device_initcall(scsi_debug_init);
|
|
module_exit(scsi_debug_exit);
|
|
|
|
void pseudo_0_release(struct device * dev)
|
|
{
|
|
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
|
|
printk(KERN_INFO "scsi_debug: pseudo_0_release() called\n");
|
|
}
|
|
|
|
static struct device pseudo_primary = {
|
|
.bus_id = "pseudo_0",
|
|
.release = pseudo_0_release,
|
|
};
|
|
|
|
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,
|
|
};
|
|
|
|
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;
|
|
struct list_head *lh, *lh_sf;
|
|
|
|
sdbg_host = kmalloc(sizeof(*sdbg_host),GFP_KERNEL);
|
|
|
|
if (NULL == sdbg_host) {
|
|
printk(KERN_ERR "%s: out of memory at line %d\n",
|
|
__FUNCTION__, __LINE__);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
memset(sdbg_host, 0, sizeof(*sdbg_host));
|
|
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 = kmalloc(sizeof(*sdbg_devinfo),GFP_KERNEL);
|
|
if (NULL == sdbg_devinfo) {
|
|
printk(KERN_ERR "%s: out of memory at line %d\n",
|
|
__FUNCTION__, __LINE__);
|
|
error = -ENOMEM;
|
|
goto clean;
|
|
}
|
|
memset(sdbg_devinfo, 0, sizeof(*sdbg_devinfo));
|
|
sdbg_devinfo->sdbg_host = sdbg_host;
|
|
list_add_tail(&sdbg_devinfo->dev_list,
|
|
&sdbg_host->dev_info_list);
|
|
}
|
|
|
|
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;
|
|
sprintf(sdbg_host->dev.bus_id, "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_safe(lh, lh_sf, &sdbg_host->dev_info_list) {
|
|
sdbg_devinfo = list_entry(lh, struct sdebug_dev_info,
|
|
dev_list);
|
|
list_del(&sdbg_devinfo->dev_list);
|
|
kfree(sdbg_devinfo);
|
|
}
|
|
|
|
kfree(sdbg_host);
|
|
return error;
|
|
}
|
|
|
|
static void sdebug_remove_adapter(void)
|
|
{
|
|
struct sdebug_host_info * sdbg_host = NULL;
|
|
|
|
spin_lock(&sdebug_host_list_lock);
|
|
if (!list_empty(&sdebug_host_list)) {
|
|
sdbg_host = list_entry(sdebug_host_list.prev,
|
|
struct sdebug_host_info, host_list);
|
|
list_del(&sdbg_host->host_list);
|
|
}
|
|
spin_unlock(&sdebug_host_list_lock);
|
|
|
|
if (!sdbg_host)
|
|
return;
|
|
|
|
device_unregister(&sdbg_host->dev);
|
|
--scsi_debug_add_host;
|
|
}
|
|
|
|
static int sdebug_driver_probe(struct device * dev)
|
|
{
|
|
int error = 0;
|
|
struct sdebug_host_info *sdbg_host;
|
|
struct Scsi_Host *hpnt;
|
|
|
|
sdbg_host = to_sdebug_host(dev);
|
|
|
|
hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
|
|
if (NULL == hpnt) {
|
|
printk(KERN_ERR "%s: scsi_register failed\n", __FUNCTION__);
|
|
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 = scsi_debug_max_luns;
|
|
|
|
error = scsi_add_host(hpnt, &sdbg_host->dev);
|
|
if (error) {
|
|
printk(KERN_ERR "%s: scsi_add_host failed\n", __FUNCTION__);
|
|
error = -ENODEV;
|
|
scsi_host_put(hpnt);
|
|
} else
|
|
scsi_scan_host(hpnt);
|
|
|
|
|
|
return error;
|
|
}
|
|
|
|
static int sdebug_driver_remove(struct device * dev)
|
|
{
|
|
struct list_head *lh, *lh_sf;
|
|
struct sdebug_host_info *sdbg_host;
|
|
struct sdebug_dev_info *sdbg_devinfo;
|
|
|
|
sdbg_host = to_sdebug_host(dev);
|
|
|
|
if (!sdbg_host) {
|
|
printk(KERN_ERR "%s: Unable to locate host info\n",
|
|
__FUNCTION__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
scsi_remove_host(sdbg_host->shost);
|
|
|
|
list_for_each_safe(lh, lh_sf, &sdbg_host->dev_info_list) {
|
|
sdbg_devinfo = list_entry(lh, struct sdebug_dev_info,
|
|
dev_list);
|
|
list_del(&sdbg_devinfo->dev_list);
|
|
kfree(sdbg_devinfo);
|
|
}
|
|
|
|
scsi_host_put(sdbg_host->shost);
|
|
return 0;
|
|
}
|
|
|
|
static void sdebug_max_tgts_luns(void)
|
|
{
|
|
struct sdebug_host_info * sdbg_host;
|
|
struct Scsi_Host *hpnt;
|
|
|
|
spin_lock(&sdebug_host_list_lock);
|
|
list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
|
|
hpnt = sdbg_host->shost;
|
|
if ((hpnt->this_id >= 0) &&
|
|
(scsi_debug_num_tgts > hpnt->this_id))
|
|
hpnt->max_id = scsi_debug_num_tgts + 1;
|
|
else
|
|
hpnt->max_id = scsi_debug_num_tgts;
|
|
hpnt->max_lun = scsi_debug_max_luns;
|
|
}
|
|
spin_unlock(&sdebug_host_list_lock);
|
|
}
|