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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/scsi/scsi_devinfo.c
Linux-2.6.12-rc2v2.6.12-rc2
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!
Diffstat (limited to 'drivers/scsi/scsi_devinfo.c')
-rw-r--r--drivers/scsi/scsi_devinfo.c564
1 files changed, 564 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_devinfo.c b/drivers/scsi/scsi_devinfo.c
new file mode 100644
index 000000000000..6121dc1bfada
--- /dev/null
+++ b/drivers/scsi/scsi_devinfo.c
@@ -0,0 +1,564 @@
+
+#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 */
+ {"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},
+ {"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 */
+
+ /*
+ * 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},
+ {"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", "LOGICAL VOLUME", NULL, BLIST_FORCELUN},
+ {"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_SPARSELUN | 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", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN},
+ {"EMULEX", "MD21/S2 ESDI", NULL, BLIST_SINGLELUN},
+ {"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},
+ {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP VA7400 */
+ {"HP", "OPEN-", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, /* 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},
+ {"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},
+ {"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},
+ {"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},
+ {"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},
+ {"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, unsigned char *vendor,
+ 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;
+}