swh:1:snp:49cd9498d6cccc5e78252c27dcb645bcf7bf0c91
Tip revision: bbf25010f1a6b761914430f5fca081ec8c7accd1 authored by Linus Torvalds on 09 October 2007, 20:31:38 UTC
Linux 2.6.23
Linux 2.6.23
Tip revision: bbf2501
scsi_devinfo.c
#include <linux/blkdev.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_devinfo.h>
#include "scsi_priv.h"
/*
* scsi_dev_info_list: structure to hold black/white listed devices.
*/
struct scsi_dev_info_list {
struct list_head dev_info_list;
char vendor[8];
char model[16];
unsigned flags;
unsigned compatible; /* for use with scsi_static_device_list entries */
};
static const char spaces[] = " "; /* 16 of them */
static unsigned scsi_default_dev_flags;
static LIST_HEAD(scsi_dev_info_list);
static char scsi_dev_flags[256];
/*
* scsi_static_device_list: deprecated list of devices that require
* settings that differ from the default, includes black-listed (broken)
* devices. The entries here are added to the tail of scsi_dev_info_list
* via scsi_dev_info_list_init.
*
* Do not add to this list, use the command line or proc interface to add
* to the scsi_dev_info_list. This table will eventually go away.
*/
static struct {
char *vendor;
char *model;
char *revision; /* revision known to be bad, unused */
unsigned flags;
} scsi_static_device_list[] __initdata = {
/*
* The following devices are known not to tolerate a lun != 0 scan
* for one reason or another. Some will respond to all luns,
* others will lock up.
*/
{"Aashima", "IMAGERY 2400SP", "1.03", BLIST_NOLUN}, /* locks up */
{"CHINON", "CD-ROM CDS-431", "H42", BLIST_NOLUN}, /* locks up */
{"CHINON", "CD-ROM CDS-535", "Q14", BLIST_NOLUN}, /* locks up */
{"DENON", "DRD-25X", "V", BLIST_NOLUN}, /* locks up */
{"HITACHI", "DK312C", "CM81", BLIST_NOLUN}, /* responds to all lun */
{"HITACHI", "DK314C", "CR21", BLIST_NOLUN}, /* responds to all lun */
{"IBM", "2104-DU3", NULL, BLIST_NOLUN}, /* locks up */
{"IBM", "2104-TU3", NULL, BLIST_NOLUN}, /* locks up */
{"IMS", "CDD521/10", "2.06", BLIST_NOLUN}, /* locks up */
{"MAXTOR", "XT-3280", "PR02", BLIST_NOLUN}, /* locks up */
{"MAXTOR", "XT-4380S", "B3C", BLIST_NOLUN}, /* locks up */
{"MAXTOR", "MXT-1240S", "I1.2", BLIST_NOLUN}, /* locks up */
{"MAXTOR", "XT-4170S", "B5A", BLIST_NOLUN}, /* locks up */
{"MAXTOR", "XT-8760S", "B7B", BLIST_NOLUN}, /* locks up */
{"MEDIAVIS", "RENO CD-ROMX2A", "2.03", BLIST_NOLUN}, /* responds to all lun */
{"MICROTEK", "ScanMakerIII", "2.30", BLIST_NOLUN}, /* responds to all lun */
{"NEC", "CD-ROM DRIVE:841", "1.0", BLIST_NOLUN},/* locks up */
{"PHILIPS", "PCA80SC", "V4-2", BLIST_NOLUN}, /* responds to all lun */
{"RODIME", "RO3000S", "2.33", BLIST_NOLUN}, /* locks up */
{"SUN", "SENA", NULL, BLIST_NOLUN}, /* responds to all luns */
/*
* The following causes a failed REQUEST SENSE on lun 1 for
* aha152x controller, which causes SCSI code to reset bus.
*/
{"SANYO", "CRD-250S", "1.20", BLIST_NOLUN},
/*
* The following causes a failed REQUEST SENSE on lun 1 for
* aha152x controller, which causes SCSI code to reset bus.
*/
{"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN},
{"SEAGATE", "ST296", "921", BLIST_NOLUN}, /* responds to all lun */
{"SEAGATE", "ST1581", "6538", BLIST_NOLUN}, /* responds to all lun */
{"SONY", "CD-ROM CDU-541", "4.3d", BLIST_NOLUN},
{"SONY", "CD-ROM CDU-55S", "1.0i", BLIST_NOLUN},
{"SONY", "CD-ROM CDU-561", "1.7x", BLIST_NOLUN},
{"SONY", "CD-ROM CDU-8012", NULL, BLIST_NOLUN},
{"SONY", "SDT-5000", "3.17", BLIST_SELECT_NO_ATN},
{"TANDBERG", "TDC 3600", "U07", BLIST_NOLUN}, /* locks up */
{"TEAC", "CD-R55S", "1.0H", BLIST_NOLUN}, /* locks up */
/*
* The following causes a failed REQUEST SENSE on lun 1 for
* seagate controller, which causes SCSI code to reset bus.
*/
{"TEAC", "CD-ROM", "1.06", BLIST_NOLUN},
{"TEAC", "MT-2ST/45S2-27", "RV M", BLIST_NOLUN}, /* responds to all lun */
/*
* The following causes a failed REQUEST SENSE on lun 1 for
* seagate controller, which causes SCSI code to reset bus.
*/
{"HP", "C1750A", "3226", BLIST_NOLUN}, /* scanjet iic */
{"HP", "C1790A", "", BLIST_NOLUN}, /* scanjet iip */
{"HP", "C2500A", "", BLIST_NOLUN}, /* scanjet iicx */
{"MEDIAVIS", "CDR-H93MV", "1.31", BLIST_NOLUN}, /* locks up */
{"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN}, /* responds to all lun */
{"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN}, /* locks up */
{"NEC", "D3856", "0009", BLIST_NOLUN},
{"QUANTUM", "LPS525S", "3110", BLIST_NOLUN}, /* locks up */
{"QUANTUM", "PD1225S", "3110", BLIST_NOLUN}, /* locks up */
{"QUANTUM", "FIREBALL ST4.3S", "0F0C", BLIST_NOLUN}, /* locks up */
{"RELISYS", "Scorpio", NULL, BLIST_NOLUN}, /* responds to all lun */
{"SANKYO", "CP525", "6.64", BLIST_NOLUN}, /* causes failed REQ SENSE, extra reset */
{"TEXEL", "CD-ROM", "1.06", BLIST_NOLUN},
{"transtec", "T5008", "0001", BLIST_NOREPORTLUN },
{"YAMAHA", "CDR100", "1.00", BLIST_NOLUN}, /* locks up */
{"YAMAHA", "CDR102", "1.00", BLIST_NOLUN}, /* locks up */
{"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN}, /* locks up */
{"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN}, /* locks up */
{"", "Scanner", "1.80", BLIST_NOLUN}, /* responds to all lun */
/*
* Other types of devices that have special flags.
* Note that all USB devices should have the BLIST_INQUIRY_36 flag.
*/
{"3PARdata", "VV", NULL, BLIST_REPORTLUN2},
{"ADAPTEC", "AACRAID", NULL, BLIST_FORCELUN},
{"ADAPTEC", "Adaptec 5400S", NULL, BLIST_FORCELUN},
{"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN},
{"BELKIN", "USB 2 HS-CF", "1.95", BLIST_FORCELUN | BLIST_INQUIRY_36},
{"BROWNIE", "1200U3P", NULL, BLIST_NOREPORTLUN},
{"BROWNIE", "1600U3P", NULL, BLIST_NOREPORTLUN},
{"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
{"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36},
{"CMD", "CRA-7280", NULL, BLIST_SPARSELUN}, /* CMD RAID Controller */
{"CNSI", "G7324", NULL, BLIST_SPARSELUN}, /* Chaparral G7324 RAID */
{"CNSi", "G8324", NULL, BLIST_SPARSELUN}, /* Chaparral G8324 RAID */
{"COMPAQ", "ARRAY CONTROLLER", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
BLIST_MAX_512 | BLIST_REPORTLUN2}, /* Compaq RA4x00 */
{"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN | BLIST_MAX_512}, /* Compaq RA4x00 */
{"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
{"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
{"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
{"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
{"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
{"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
{"DELL", "PV660F", NULL, BLIST_SPARSELUN},
{"DELL", "PV660F PSEUDO", NULL, BLIST_SPARSELUN},
{"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN}, /* Dell PV 530F */
{"DELL", "PV530F", NULL, BLIST_SPARSELUN},
{"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
{"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, storage on LUN 0 */
{"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, no storage on LUN 0 */
{"EMC", "Invista", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
{"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN},
{"EMULEX", "MD21/S2 ESDI", NULL, BLIST_SINGLELUN},
{"easyRAID", "16P", NULL, BLIST_NOREPORTLUN},
{"easyRAID", "X6P", NULL, BLIST_NOREPORTLUN},
{"easyRAID", "F8", NULL, BLIST_NOREPORTLUN},
{"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
{"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
{"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN | BLIST_INQUIRY_36},
{"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN | BLIST_INQUIRY_36},
{"HITACHI", "DF400", "*", BLIST_SPARSELUN},
{"HITACHI", "DF500", "*", BLIST_SPARSELUN},
{"HITACHI", "DF600", "*", BLIST_SPARSELUN},
{"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_ATTACH_PQ3 | BLIST_SPARSELUN | BLIST_LARGELUN},
{"HITACHI", "OPEN-E", "*", BLIST_ATTACH_PQ3 | BLIST_SPARSELUN | BLIST_LARGELUN},
{"HITACHI", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
{"HITACHI", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
{"HITACHI", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
{"HITACHI", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
{"HITACHI", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
{"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP VA7400 */
{"HP", "OPEN-", "*", BLIST_REPORTLUN2}, /* HP XP Arrays */
{"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
{"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
{"HP", "C1557A", NULL, BLIST_FORCELUN},
{"HP", "C3323-300", "4269", BLIST_NOTQ},
{"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
{"HP", "DF400", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
{"HP", "DF500", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
{"HP", "DF600", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
{"HP", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
{"HP", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
{"HP", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
{"HP", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
{"HP", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
{"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
{"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
{"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
{"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
{"IOMEGA", "Io20S *F", NULL, BLIST_KEY},
{"INSITE", "Floptical F*8I", NULL, BLIST_KEY},
{"INSITE", "I325VM", NULL, BLIST_KEY},
{"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
{"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
{"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
{"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
{"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
{"Medion", "Flash XL MMC/SD", "2.6D", BLIST_FORCELUN},
{"MegaRAID", "LD", NULL, BLIST_FORCELUN},
{"MICROP", "4110", NULL, BLIST_NOTQ},
{"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
{"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
{"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
{"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
{"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
{"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
{"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
{"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
{"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
{"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
{"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
{"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
{"Promise", "", NULL, BLIST_SPARSELUN},
{"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
{"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
{"SEAGATE", "ST34555N", "0930", BLIST_NOTQ}, /* Chokes on tagged INQUIRY */
{"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
{"SGI", "RAID3", "*", BLIST_SPARSELUN},
{"SGI", "RAID5", "*", BLIST_SPARSELUN},
{"SGI", "TP9100", "*", BLIST_REPORTLUN2},
{"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
{"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
{"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
{"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
{"SONY", "TSL", NULL, BLIST_FORCELUN}, /* DDS3 & DDS4 autoloaders */
{"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
{"SUN", "T300", "*", BLIST_SPARSELUN},
{"SUN", "T4", "*", BLIST_SPARSELUN},
{"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
{"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
{"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
{"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
{"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
{"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
{"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
{"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
{"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
{"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
{"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
{"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
{ NULL, NULL, NULL, 0 },
};
/*
* scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
* devinfo vendor and model strings.
*/
static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
char *from, int compatible)
{
size_t from_length;
from_length = strlen(from);
strncpy(to, from, min(to_length, from_length));
if (from_length < to_length) {
if (compatible) {
/*
* NUL terminate the string if it is short.
*/
to[from_length] = '\0';
} else {
/*
* space pad the string if it is short.
*/
strncpy(&to[from_length], spaces,
to_length - from_length);
}
}
if (from_length > to_length)
printk(KERN_WARNING "%s: %s string '%s' is too long\n",
__FUNCTION__, name, from);
}
/**
* scsi_dev_info_list_add: add one dev_info list entry.
* @vendor: vendor string
* @model: model (product) string
* @strflags: integer string
* @flag: if strflags NULL, use this flag value
*
* Description:
* Create and add one dev_info entry for @vendor, @model, @strflags or
* @flag. If @compatible, add to the tail of the list, do not space
* pad, and set devinfo->compatible. The scsi_static_device_list entries
* are added with @compatible 1 and @clfags NULL.
*
* Returns: 0 OK, -error on failure.
**/
static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
char *strflags, int flags)
{
struct scsi_dev_info_list *devinfo;
devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
if (!devinfo) {
printk(KERN_ERR "%s: no memory\n", __FUNCTION__);
return -ENOMEM;
}
scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
vendor, compatible);
scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
model, compatible);
if (strflags)
devinfo->flags = simple_strtoul(strflags, NULL, 0);
else
devinfo->flags = flags;
devinfo->compatible = compatible;
if (compatible)
list_add_tail(&devinfo->dev_info_list, &scsi_dev_info_list);
else
list_add(&devinfo->dev_info_list, &scsi_dev_info_list);
return 0;
}
/**
* scsi_dev_info_list_add_str: parse dev_list and add to the
* scsi_dev_info_list.
* @dev_list: string of device flags to add
*
* Description:
* Parse dev_list, and add entries to the scsi_dev_info_list.
* dev_list is of the form "vendor:product:flag,vendor:product:flag".
* dev_list is modified via strsep. Can be called for command line
* addition, for proc or mabye a sysfs interface.
*
* Returns: 0 if OK, -error on failure.
**/
static int scsi_dev_info_list_add_str(char *dev_list)
{
char *vendor, *model, *strflags, *next;
char *next_check;
int res = 0;
next = dev_list;
if (next && next[0] == '"') {
/*
* Ignore both the leading and trailing quote.
*/
next++;
next_check = ",\"";
} else {
next_check = ",";
}
/*
* For the leading and trailing '"' case, the for loop comes
* through the last time with vendor[0] == '\0'.
*/
for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
&& (res == 0); vendor = strsep(&next, ":")) {
strflags = NULL;
model = strsep(&next, ":");
if (model)
strflags = strsep(&next, next_check);
if (!model || !strflags) {
printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
" '%s'\n", __FUNCTION__, vendor, model,
strflags);
res = -EINVAL;
} else
res = scsi_dev_info_list_add(0 /* compatible */, vendor,
model, strflags, 0);
}
return res;
}
/**
* get_device_flags - get device specific flags from the dynamic device
* list. Called during scan time.
* @vendor: vendor name
* @model: model name
*
* Description:
* Search the scsi_dev_info_list for an entry matching @vendor and
* @model, if found, return the matching flags value, else return
* the host or global default settings.
**/
int scsi_get_device_flags(struct scsi_device *sdev,
const unsigned char *vendor,
const unsigned char *model)
{
struct scsi_dev_info_list *devinfo;
unsigned int bflags;
bflags = sdev->sdev_bflags;
if (!bflags)
bflags = scsi_default_dev_flags;
list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) {
if (devinfo->compatible) {
/*
* Behave like the older version of get_device_flags.
*/
size_t max;
/*
* XXX why skip leading spaces? If an odd INQUIRY
* value, that should have been part of the
* scsi_static_device_list[] entry, such as " FOO"
* rather than "FOO". Since this code is already
* here, and we don't know what device it is
* trying to work with, leave it as-is.
*/
max = 8; /* max length of vendor */
while ((max > 0) && *vendor == ' ') {
max--;
vendor++;
}
/*
* XXX removing the following strlen() would be
* good, using it means that for a an entry not in
* the list, we scan every byte of every vendor
* listed in scsi_static_device_list[], and never match
* a single one (and still have to compare at
* least the first byte of each vendor).
*/
if (memcmp(devinfo->vendor, vendor,
min(max, strlen(devinfo->vendor))))
continue;
/*
* Skip spaces again.
*/
max = 16; /* max length of model */
while ((max > 0) && *model == ' ') {
max--;
model++;
}
if (memcmp(devinfo->model, model,
min(max, strlen(devinfo->model))))
continue;
return devinfo->flags;
} else {
if (!memcmp(devinfo->vendor, vendor,
sizeof(devinfo->vendor)) &&
!memcmp(devinfo->model, model,
sizeof(devinfo->model)))
return devinfo->flags;
}
}
return bflags;
}
#ifdef CONFIG_SCSI_PROC_FS
/*
* proc_scsi_dev_info_read: dump the scsi_dev_info_list via
* /proc/scsi/device_info
*/
static int proc_scsi_devinfo_read(char *buffer, char **start,
off_t offset, int length)
{
struct scsi_dev_info_list *devinfo;
int size, len = 0;
off_t begin = 0;
off_t pos = 0;
list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) {
size = sprintf(buffer + len, "'%.8s' '%.16s' 0x%x\n",
devinfo->vendor, devinfo->model, devinfo->flags);
len += size;
pos = begin + len;
if (pos < offset) {
len = 0;
begin = pos;
}
if (pos > offset + length)
goto stop_output;
}
stop_output:
*start = buffer + (offset - begin); /* Start of wanted data */
len -= (offset - begin); /* Start slop */
if (len > length)
len = length; /* Ending slop */
return (len);
}
/*
* proc_scsi_dev_info_write: allow additions to the scsi_dev_info_list via
* /proc.
*
* Use: echo "vendor:model:flag" > /proc/scsi/device_info
*
* To add a black/white list entry for vendor and model with an integer
* value of flag to the scsi device info list.
*/
static int proc_scsi_devinfo_write(struct file *file, const char __user *buf,
unsigned long length, void *data)
{
char *buffer;
int err = length;
if (!buf || length>PAGE_SIZE)
return -EINVAL;
if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
return -ENOMEM;
if (copy_from_user(buffer, buf, length)) {
err =-EFAULT;
goto out;
}
if (length < PAGE_SIZE)
buffer[length] = '\0';
else if (buffer[PAGE_SIZE-1]) {
err = -EINVAL;
goto out;
}
scsi_dev_info_list_add_str(buffer);
out:
free_page((unsigned long)buffer);
return err;
}
#endif /* CONFIG_SCSI_PROC_FS */
module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
MODULE_PARM_DESC(dev_flags,
"Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
" list entries for vendor and model with an integer value of flags"
" to the scsi device info list");
module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(default_dev_flags,
"scsi default device flag integer value");
/**
* scsi_dev_info_list_delete: called from scsi.c:exit_scsi to remove
* the scsi_dev_info_list.
**/
void scsi_exit_devinfo(void)
{
struct list_head *lh, *lh_next;
struct scsi_dev_info_list *devinfo;
#ifdef CONFIG_SCSI_PROC_FS
remove_proc_entry("scsi/device_info", NULL);
#endif
list_for_each_safe(lh, lh_next, &scsi_dev_info_list) {
devinfo = list_entry(lh, struct scsi_dev_info_list,
dev_info_list);
kfree(devinfo);
}
}
/**
* scsi_dev_list_init: set up the dynamic device list.
* @dev_list: string of device flags to add
*
* Description:
* Add command line @dev_list entries, then add
* scsi_static_device_list entries to the scsi device info list.
**/
int __init scsi_init_devinfo(void)
{
#ifdef CONFIG_SCSI_PROC_FS
struct proc_dir_entry *p;
#endif
int error, i;
error = scsi_dev_info_list_add_str(scsi_dev_flags);
if (error)
return error;
for (i = 0; scsi_static_device_list[i].vendor; i++) {
error = scsi_dev_info_list_add(1 /* compatibile */,
scsi_static_device_list[i].vendor,
scsi_static_device_list[i].model,
NULL,
scsi_static_device_list[i].flags);
if (error)
goto out;
}
#ifdef CONFIG_SCSI_PROC_FS
p = create_proc_entry("scsi/device_info", 0, NULL);
if (!p) {
error = -ENOMEM;
goto out;
}
p->owner = THIS_MODULE;
p->get_info = proc_scsi_devinfo_read;
p->write_proc = proc_scsi_devinfo_write;
#endif /* CONFIG_SCSI_PROC_FS */
out:
if (error)
scsi_exit_devinfo();
return error;
}
