Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 886 insertions, 0 deletions

diff --git a/drivers/scsi/scsi_devinfo.c b/drivers/scsi/scsi_devinfo.c
new file mode 100644
index 000000000..3fcaf10a9
--- /dev/null
+++ b/drivers/scsi/scsi_devinfo.c
@@ -0,0 +1,886 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#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 <linux/slab.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];
+	blist_flags_t flags;
+	unsigned compatible; /* for use with scsi_static_device_list entries */
+};
+
+struct scsi_dev_info_list_table {
+	struct list_head node;	/* our node for being on the master list */
+	struct list_head scsi_dev_info_list; /* head of dev info list */
+	const char *name;	/* name of list for /proc (NULL for global) */
+	int key;		/* unique numeric identifier */
+};
+
+
+static blist_flags_t 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 */
+	blist_flags_t 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", NULL, BLIST_NOLUN},		/* scanjet iip */
+	{"HP", "C2500A", NULL, 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 | BLIST_BORKEN},
+	{"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},
+	{"AIX", "VDASD", NULL, BLIST_TRY_VPD_PAGES | BLIST_NO_VPD_SIZE},
+	{"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},	/* EMC CLARiiON, storage on LUN 0 */
+	{"DGC", "DISK", NULL, BLIST_SPARSELUN},	/* EMC CLARiiON, no storage on LUN 0 */
+	{"EMC",  "Invista", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
+	{"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
+	 BLIST_REPORTLUN2 | BLIST_RETRY_ITF},
+	{"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},
+	{"FUJITSU", "ETERNUS_DXM", "*", BLIST_RETRY_ASC_C1},
+	{"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
+	{"Generic", "USB Storage-SMC", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36}, /* FW: 0180 and 0207 */
+	{"Generic", "Ultra HS-SD/MMC", "2.09", BLIST_IGN_MEDIA_CHANGE | BLIST_INQUIRY_36},
+	{"HITACHI", "DF400", "*", BLIST_REPORTLUN2},
+	{"HITACHI", "DF500", "*", BLIST_REPORTLUN2},
+	{"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_REPORTLUN2},
+	{"HITACHI", "HUS1530", "*", BLIST_NO_DIF},
+	{"HITACHI", "OPEN-", "*", BLIST_REPORTLUN2 | BLIST_TRY_VPD_PAGES},
+	{"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN},	/* HP VA7400 */
+	{"HP", "OPEN-", "*", BLIST_REPORTLUN2 | BLIST_TRY_VPD_PAGES}, /* 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", "DISK-SUBSYSTEM", "*", BLIST_REPORTLUN2},
+	{"HPE", "OPEN-", "*", BLIST_REPORTLUN2 | BLIST_TRY_VPD_PAGES},
+	{"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
+	{"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
+	{"IBM", "2076", NULL, BLIST_NO_VPD_SIZE},
+	{"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
+	{"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
+	{"IOMEGA", "ZIP", NULL, BLIST_NOTQ | BLIST_NOLUN},
+	{"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
+	{"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
+	{"INSITE", "I325VM", NULL, BLIST_KEY},
+	{"Intel", "Multi-Flex", NULL, BLIST_NO_RSOC},
+	{"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
+	{"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
+	{"Marvell", "Console", NULL, BLIST_SKIP_VPD_PAGES},
+	{"Marvell", "91xx Config", "1.01", BLIST_SKIP_VPD_PAGES},
+	{"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},
+	{"MSFT", "Virtual HD", NULL, BLIST_MAX_1024 | BLIST_NO_RSOC},
+	{"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", "VTrak E610f", NULL, BLIST_SPARSELUN | BLIST_NO_RSOC},
+	{"Promise", "", NULL, BLIST_SPARSELUN},
+	{"QEMU", "QEMU CD-ROM", NULL, BLIST_SKIP_VPD_PAGES},
+	{"QNAP", "iSCSI Storage", NULL, BLIST_MAX_1024},
+	{"SYNOLOGY", "iSCSI Storage", NULL, BLIST_MAX_1024},
+	{"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
+	{"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},
+	{"SEAGATE", "ST900MM0006", NULL, BLIST_SKIP_VPD_PAGES},
+	{"SGI", "RAID3", "*", BLIST_SPARSELUN},
+	{"SGI", "RAID5", "*", BLIST_SPARSELUN},
+	{"SGI", "TP9100", "*", BLIST_REPORTLUN2},
+	{"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
+	{"SKhynix", "H28U74301AMR", NULL, BLIST_SKIP_VPD_PAGES},
+	{"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
+	{"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
+	{"DELL", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
+	{"STK", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
+	{"NETAPP", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
+	{"LSI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
+	{"ENGENIO", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
+	{"LENOVO", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
+	{"FUJITSU", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
+	{"SanDisk", "Cruzer Blade", NULL, BLIST_TRY_VPD_PAGES |
+		BLIST_INQUIRY_36},
+	{"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},
+	{"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
+	{"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
+	{"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
+	{"Traxdata", "CDR4120", NULL, BLIST_NOLUN},	/* locks up */
+	{"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 },
+};
+
+static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
+{
+	struct scsi_dev_info_list_table *devinfo_table;
+	int found = 0;
+
+	list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
+		if (devinfo_table->key == key) {
+			found = 1;
+			break;
+		}
+	if (!found)
+		return ERR_PTR(-EINVAL);
+
+	return devinfo_table;
+}
+
+/*
+ * 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);
+	/* This zero-pads the destination */
+	strncpy(to, from, to_length);
+	if (from_length < to_length && !compatible) {
+		/*
+		 * space pad the string if it is short.
+		 */
+		memset(&to[from_length], ' ', to_length - from_length);
+	}
+	if (from_length > to_length)
+		 printk(KERN_WARNING "%s: %s string '%s' is too long\n",
+			__func__, name, from);
+}
+
+/**
+ * scsi_dev_info_list_add - add one dev_info list entry.
+ * @compatible: if true, null terminate short strings.  Otherwise space pad.
+ * @vendor:	vendor string
+ * @model:	model (product) string
+ * @strflags:	integer string
+ * @flags:	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, blist_flags_t flags)
+{
+	return scsi_dev_info_list_add_keyed(compatible, vendor, model,
+					    strflags, flags,
+					    SCSI_DEVINFO_GLOBAL);
+}
+
+/**
+ * scsi_dev_info_list_add_keyed - add one dev_info list entry.
+ * @compatible: if true, null terminate short strings.  Otherwise space pad.
+ * @vendor:	vendor string
+ * @model:	model (product) string
+ * @strflags:	integer string
+ * @flags:	if strflags NULL, use this flag value
+ * @key:	specify list to use
+ *
+ * Description:
+ *	Create and add one dev_info entry for @vendor, @model,
+ *	@strflags or @flag in list specified by @key. 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.
+ **/
+int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
+				 char *strflags, blist_flags_t flags,
+				 enum scsi_devinfo_key key)
+{
+	struct scsi_dev_info_list *devinfo;
+	struct scsi_dev_info_list_table *devinfo_table =
+		scsi_devinfo_lookup_by_key(key);
+
+	if (IS_ERR(devinfo_table))
+		return PTR_ERR(devinfo_table);
+
+	devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
+	if (!devinfo) {
+		printk(KERN_ERR "%s: no memory\n", __func__);
+		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) {
+		unsigned long long val;
+		int ret = kstrtoull(strflags, 0, &val);
+
+		if (ret != 0) {
+			kfree(devinfo);
+			return ret;
+		}
+		flags = (__force blist_flags_t)val;
+	}
+	if (flags & __BLIST_UNUSED_MASK) {
+		pr_err("scsi_devinfo (%s:%s): unsupported flags 0x%llx",
+		       vendor, model, flags & __BLIST_UNUSED_MASK);
+		kfree(devinfo);
+		return -EINVAL;
+	}
+	devinfo->flags = flags;
+	devinfo->compatible = compatible;
+
+	if (compatible)
+		list_add_tail(&devinfo->dev_info_list,
+			      &devinfo_table->scsi_dev_info_list);
+	else
+		list_add(&devinfo->dev_info_list,
+			 &devinfo_table->scsi_dev_info_list);
+
+	return 0;
+}
+EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
+
+/**
+ * scsi_dev_info_list_find - find a matching dev_info list entry.
+ * @vendor:	full vendor string
+ * @model:	full model (product) string
+ * @key:	specify list to use
+ *
+ * Description:
+ *	Finds the first dev_info entry matching @vendor, @model
+ *	in list specified by @key.
+ *
+ * Returns: pointer to matching entry, or ERR_PTR on failure.
+ **/
+static struct scsi_dev_info_list *scsi_dev_info_list_find(const char *vendor,
+		const char *model, enum scsi_devinfo_key key)
+{
+	struct scsi_dev_info_list *devinfo;
+	struct scsi_dev_info_list_table *devinfo_table =
+		scsi_devinfo_lookup_by_key(key);
+	size_t vmax, mmax, mlen;
+	const char *vskip, *mskip;
+
+	if (IS_ERR(devinfo_table))
+		return (struct scsi_dev_info_list *) devinfo_table;
+
+	/* Prepare for "compatible" matches */
+
+	/*
+	 * 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.
+	 */
+	vmax = sizeof(devinfo->vendor);
+	vskip = vendor;
+	while (vmax > 0 && *vskip == ' ') {
+		vmax--;
+		vskip++;
+	}
+	/* Also skip trailing spaces */
+	while (vmax > 0 && vskip[vmax - 1] == ' ')
+		--vmax;
+
+	mmax = sizeof(devinfo->model);
+	mskip = model;
+	while (mmax > 0 && *mskip == ' ') {
+		mmax--;
+		mskip++;
+	}
+	while (mmax > 0 && mskip[mmax - 1] == ' ')
+		--mmax;
+
+	list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
+			    dev_info_list) {
+		if (devinfo->compatible) {
+			/*
+			 * vendor strings must be an exact match
+			 */
+			if (vmax != strnlen(devinfo->vendor,
+					    sizeof(devinfo->vendor)) ||
+			    memcmp(devinfo->vendor, vskip, vmax))
+				continue;
+
+			/*
+			 * @model specifies the full string, and
+			 * must be larger or equal to devinfo->model
+			 */
+			mlen = strnlen(devinfo->model, sizeof(devinfo->model));
+			if (mmax < mlen || memcmp(devinfo->model, mskip, mlen))
+				continue;
+			return devinfo;
+		} else {
+			if (!memcmp(devinfo->vendor, vendor,
+				    sizeof(devinfo->vendor)) &&
+			    !memcmp(devinfo->model, model,
+				    sizeof(devinfo->model)))
+				return devinfo;
+		}
+	}
+
+	return ERR_PTR(-ENOENT);
+}
+
+/**
+ * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
+ * @vendor:	vendor string
+ * @model:	model (product) string
+ * @key:	specify list to use
+ *
+ * Description:
+ *	Remove and destroy one dev_info entry for @vendor, @model
+ *	in list specified by @key.
+ *
+ * Returns: 0 OK, -error on failure.
+ **/
+int scsi_dev_info_list_del_keyed(char *vendor, char *model,
+				 enum scsi_devinfo_key key)
+{
+	struct scsi_dev_info_list *found;
+
+	found = scsi_dev_info_list_find(vendor, model, key);
+	if (IS_ERR(found))
+		return PTR_ERR(found);
+
+	list_del(&found->dev_info_list);
+	kfree(found);
+	return 0;
+}
+EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
+
+/**
+ * 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", __func__, vendor, model,
+			       strflags);
+			res = -EINVAL;
+		} else
+			res = scsi_dev_info_list_add(0 /* compatible */, vendor,
+						     model, strflags, 0);
+	}
+	return res;
+}
+
+/**
+ * scsi_get_device_flags - get device specific flags from the dynamic
+ *	device list.
+ * @sdev:       &scsi_device to get flags for
+ * @vendor:	vendor name
+ * @model:	model name
+ *
+ * Description:
+ *     Search the global scsi_dev_info_list (specified by list zero)
+ *     for an entry matching @vendor and @model, if found, return the
+ *     matching flags value, else return the host or global default
+ *     settings.  Called during scan time.
+ **/
+blist_flags_t scsi_get_device_flags(struct scsi_device *sdev,
+				    const unsigned char *vendor,
+				    const unsigned char *model)
+{
+	return scsi_get_device_flags_keyed(sdev, vendor, model,
+					   SCSI_DEVINFO_GLOBAL);
+}
+
+
+/**
+ * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
+ * @sdev:       &scsi_device to get flags for
+ * @vendor:	vendor name
+ * @model:	model name
+ * @key:	list to look up
+ *
+ * Description:
+ *     Search the scsi_dev_info_list specified by @key for an entry
+ *     matching @vendor and @model, if found, return the matching
+ *     flags value, else return the host or global default settings.
+ *     Called during scan time.
+ **/
+blist_flags_t scsi_get_device_flags_keyed(struct scsi_device *sdev,
+				const unsigned char *vendor,
+				const unsigned char *model,
+				enum scsi_devinfo_key key)
+{
+	struct scsi_dev_info_list *devinfo;
+
+	devinfo = scsi_dev_info_list_find(vendor, model, key);
+	if (!IS_ERR(devinfo))
+		return devinfo->flags;
+
+	/* key or device not found: return nothing */
+	if (key != SCSI_DEVINFO_GLOBAL)
+		return 0;
+
+	/* except for the global list, where we have an exception */
+	if (sdev->sdev_bflags)
+		return sdev->sdev_bflags;
+
+	return scsi_default_dev_flags;
+}
+EXPORT_SYMBOL(scsi_get_device_flags_keyed);
+
+#ifdef CONFIG_SCSI_PROC_FS
+struct double_list {
+	struct list_head *top;
+	struct list_head *bottom;
+};
+
+static int devinfo_seq_show(struct seq_file *m, void *v)
+{
+	struct double_list *dl = v;
+	struct scsi_dev_info_list_table *devinfo_table =
+		list_entry(dl->top, struct scsi_dev_info_list_table, node);
+	struct scsi_dev_info_list *devinfo =
+		list_entry(dl->bottom, struct scsi_dev_info_list,
+			   dev_info_list);
+
+	if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
+	    devinfo_table->name)
+		seq_printf(m, "[%s]:\n", devinfo_table->name);
+
+	seq_printf(m, "'%.8s' '%.16s' 0x%llx\n",
+		   devinfo->vendor, devinfo->model, devinfo->flags);
+	return 0;
+}
+
+static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
+{
+	struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
+	loff_t pos = *ppos;
+
+	if (!dl)
+		return NULL;
+
+	list_for_each(dl->top, &scsi_dev_info_list) {
+		struct scsi_dev_info_list_table *devinfo_table =
+			list_entry(dl->top, struct scsi_dev_info_list_table,
+				   node);
+		list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
+			if (pos-- == 0)
+				return dl;
+	}
+
+	kfree(dl);
+	return NULL;
+}
+
+static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
+{
+	struct double_list *dl = v;
+	struct scsi_dev_info_list_table *devinfo_table =
+		list_entry(dl->top, struct scsi_dev_info_list_table, node);
+
+	++*ppos;
+	dl->bottom = dl->bottom->next;
+	while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
+		dl->top = dl->top->next;
+		if (dl->top == &scsi_dev_info_list) {
+			kfree(dl);
+			return NULL;
+		}
+		devinfo_table = list_entry(dl->top,
+					   struct scsi_dev_info_list_table,
+					   node);
+		dl->bottom = devinfo_table->scsi_dev_info_list.next;
+	}
+
+	return dl;
+}
+
+static void devinfo_seq_stop(struct seq_file *m, void *v)
+{
+	kfree(v);
+}
+
+static const struct seq_operations scsi_devinfo_seq_ops = {
+	.start	= devinfo_seq_start,
+	.next	= devinfo_seq_next,
+	.stop	= devinfo_seq_stop,
+	.show	= devinfo_seq_show,
+};
+
+static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &scsi_devinfo_seq_ops);
+}
+
+/*
+ * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
+ *
+ * Description: Adds a black/white list entry for vendor and model with an
+ * integer value of flag to the scsi device info list.
+ * To use, echo "vendor:model:flag" > /proc/scsi/device_info
+ */
+static ssize_t proc_scsi_devinfo_write(struct file *file,
+				       const char __user *buf,
+				       size_t length, loff_t *ppos)
+{
+	char *buffer;
+	ssize_t 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;
+}
+
+static const struct proc_ops scsi_devinfo_proc_ops = {
+	.proc_open	= proc_scsi_devinfo_open,
+	.proc_read	= seq_read,
+	.proc_write	= proc_scsi_devinfo_write,
+	.proc_lseek	= seq_lseek,
+	.proc_release	= seq_release,
+};
+#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, ullong, 0644);
+MODULE_PARM_DESC(default_dev_flags,
+		 "scsi default device flag uint64_t value");
+
+/**
+ * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
+ **/
+void scsi_exit_devinfo(void)
+{
+#ifdef CONFIG_SCSI_PROC_FS
+	remove_proc_entry("scsi/device_info", NULL);
+#endif
+
+	scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
+}
+
+/**
+ * scsi_dev_info_add_list - add a new devinfo list
+ * @key:	key of the list to add
+ * @name:	Name of the list to add (for /proc/scsi/device_info)
+ *
+ * Adds the requested list, returns zero on success, -EEXIST if the
+ * key is already registered to a list, or other error on failure.
+ */
+int scsi_dev_info_add_list(enum scsi_devinfo_key key, const char *name)
+{
+	struct scsi_dev_info_list_table *devinfo_table =
+		scsi_devinfo_lookup_by_key(key);
+
+	if (!IS_ERR(devinfo_table))
+		/* list already exists */
+		return -EEXIST;
+
+	devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
+
+	if (!devinfo_table)
+		return -ENOMEM;
+
+	INIT_LIST_HEAD(&devinfo_table->node);
+	INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
+	devinfo_table->name = name;
+	devinfo_table->key = key;
+	list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
+
+	return 0;
+}
+EXPORT_SYMBOL(scsi_dev_info_add_list);
+
+/**
+ * scsi_dev_info_remove_list - destroy an added devinfo list
+ * @key: key of the list to destroy
+ *
+ * Iterates over the entire list first, freeing all the values, then
+ * frees the list itself.  Returns 0 on success or -EINVAL if the key
+ * can't be found.
+ */
+int scsi_dev_info_remove_list(enum scsi_devinfo_key key)
+{
+	struct list_head *lh, *lh_next;
+	struct scsi_dev_info_list_table *devinfo_table =
+		scsi_devinfo_lookup_by_key(key);
+
+	if (IS_ERR(devinfo_table))
+		/* no such list */
+		return -EINVAL;
+
+	/* remove from the master list */
+	list_del(&devinfo_table->node);
+
+	list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
+		struct scsi_dev_info_list *devinfo;
+
+		devinfo = list_entry(lh, struct scsi_dev_info_list,
+				     dev_info_list);
+		kfree(devinfo);
+	}
+	kfree(devinfo_table);
+
+	return 0;
+}
+EXPORT_SYMBOL(scsi_dev_info_remove_list);
+
+/**
+ * scsi_init_devinfo - set up the dynamic device list.
+ *
+ * Description:
+ *	Add command line entries from scsi_dev_flags, 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_add_list(SCSI_DEVINFO_GLOBAL, NULL);
+	if (error)
+		return error;
+
+	error = scsi_dev_info_list_add_str(scsi_dev_flags);
+	if (error)
+		goto out;
+
+	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 = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_ops);
+	if (!p) {
+		error = -ENOMEM;
+		goto out;
+	}
+#endif /* CONFIG_SCSI_PROC_FS */
+
+ out:
+	if (error)
+		scsi_exit_devinfo();
+	return error;
+}