spi: mpc52xx_psc_spi chipselect bugfix
[linux-2.6] / drivers / scsi / scsi_devinfo.c
1
2 #include <linux/blkdev.h>
3 #include <linux/init.h>
4 #include <linux/kernel.h>
5 #include <linux/module.h>
6 #include <linux/moduleparam.h>
7 #include <linux/proc_fs.h>
8 #include <linux/seq_file.h>
9
10 #include <scsi/scsi_device.h>
11 #include <scsi/scsi_devinfo.h>
12
13 #include "scsi_priv.h"
14
15
16 /*
17  * scsi_dev_info_list: structure to hold black/white listed devices.
18  */
19 struct scsi_dev_info_list {
20         struct list_head dev_info_list;
21         char vendor[8];
22         char model[16];
23         unsigned flags;
24         unsigned compatible; /* for use with scsi_static_device_list entries */
25 };
26
27
28 static const char spaces[] = "                "; /* 16 of them */
29 static unsigned scsi_default_dev_flags;
30 static LIST_HEAD(scsi_dev_info_list);
31 static char scsi_dev_flags[256];
32
33 /*
34  * scsi_static_device_list: deprecated list of devices that require
35  * settings that differ from the default, includes black-listed (broken)
36  * devices. The entries here are added to the tail of scsi_dev_info_list
37  * via scsi_dev_info_list_init.
38  *
39  * Do not add to this list, use the command line or proc interface to add
40  * to the scsi_dev_info_list. This table will eventually go away.
41  */
42 static struct {
43         char *vendor;
44         char *model;
45         char *revision; /* revision known to be bad, unused */
46         unsigned flags;
47 } scsi_static_device_list[] __initdata = {
48         /*
49          * The following devices are known not to tolerate a lun != 0 scan
50          * for one reason or another. Some will respond to all luns,
51          * others will lock up.
52          */
53         {"Aashima", "IMAGERY 2400SP", "1.03", BLIST_NOLUN},     /* locks up */
54         {"CHINON", "CD-ROM CDS-431", "H42", BLIST_NOLUN},       /* locks up */
55         {"CHINON", "CD-ROM CDS-535", "Q14", BLIST_NOLUN},       /* locks up */
56         {"DENON", "DRD-25X", "V", BLIST_NOLUN},                 /* locks up */
57         {"HITACHI", "DK312C", "CM81", BLIST_NOLUN},     /* responds to all lun */
58         {"HITACHI", "DK314C", "CR21", BLIST_NOLUN},     /* responds to all lun */
59         {"IBM", "2104-DU3", NULL, BLIST_NOLUN},         /* locks up */
60         {"IBM", "2104-TU3", NULL, BLIST_NOLUN},         /* locks up */
61         {"IMS", "CDD521/10", "2.06", BLIST_NOLUN},      /* locks up */
62         {"MAXTOR", "XT-3280", "PR02", BLIST_NOLUN},     /* locks up */
63         {"MAXTOR", "XT-4380S", "B3C", BLIST_NOLUN},     /* locks up */
64         {"MAXTOR", "MXT-1240S", "I1.2", BLIST_NOLUN},   /* locks up */
65         {"MAXTOR", "XT-4170S", "B5A", BLIST_NOLUN},     /* locks up */
66         {"MAXTOR", "XT-8760S", "B7B", BLIST_NOLUN},     /* locks up */
67         {"MEDIAVIS", "RENO CD-ROMX2A", "2.03", BLIST_NOLUN},    /* responds to all lun */
68         {"MICROTEK", "ScanMakerIII", "2.30", BLIST_NOLUN},      /* responds to all lun */
69         {"NEC", "CD-ROM DRIVE:841", "1.0", BLIST_NOLUN},/* locks up */
70         {"PHILIPS", "PCA80SC", "V4-2", BLIST_NOLUN},    /* responds to all lun */
71         {"RODIME", "RO3000S", "2.33", BLIST_NOLUN},     /* locks up */
72         {"SUN", "SENA", NULL, BLIST_NOLUN},             /* responds to all luns */
73         /*
74          * The following causes a failed REQUEST SENSE on lun 1 for
75          * aha152x controller, which causes SCSI code to reset bus.
76          */
77         {"SANYO", "CRD-250S", "1.20", BLIST_NOLUN},
78         /*
79          * The following causes a failed REQUEST SENSE on lun 1 for
80          * aha152x controller, which causes SCSI code to reset bus.
81          */
82         {"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN},
83         {"SEAGATE", "ST296", "921", BLIST_NOLUN},       /* responds to all lun */
84         {"SEAGATE", "ST1581", "6538", BLIST_NOLUN},     /* responds to all lun */
85         {"SONY", "CD-ROM CDU-541", "4.3d", BLIST_NOLUN},
86         {"SONY", "CD-ROM CDU-55S", "1.0i", BLIST_NOLUN},
87         {"SONY", "CD-ROM CDU-561", "1.7x", BLIST_NOLUN},
88         {"SONY", "CD-ROM CDU-8012", NULL, BLIST_NOLUN},
89         {"SONY", "SDT-5000", "3.17", BLIST_SELECT_NO_ATN},
90         {"TANDBERG", "TDC 3600", "U07", BLIST_NOLUN},   /* locks up */
91         {"TEAC", "CD-R55S", "1.0H", BLIST_NOLUN},       /* locks up */
92         /*
93          * The following causes a failed REQUEST SENSE on lun 1 for
94          * seagate controller, which causes SCSI code to reset bus.
95          */
96         {"TEAC", "CD-ROM", "1.06", BLIST_NOLUN},
97         {"TEAC", "MT-2ST/45S2-27", "RV M", BLIST_NOLUN},        /* responds to all lun */
98         /*
99          * The following causes a failed REQUEST SENSE on lun 1 for
100          * seagate controller, which causes SCSI code to reset bus.
101          */
102         {"HP", "C1750A", "3226", BLIST_NOLUN},          /* scanjet iic */
103         {"HP", "C1790A", "", BLIST_NOLUN},              /* scanjet iip */
104         {"HP", "C2500A", "", BLIST_NOLUN},              /* scanjet iicx */
105         {"MEDIAVIS", "CDR-H93MV", "1.31", BLIST_NOLUN}, /* locks up */
106         {"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN},      /* responds to all lun */
107         {"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN},     /* locks up */
108         {"NEC", "D3856", "0009", BLIST_NOLUN},
109         {"QUANTUM", "LPS525S", "3110", BLIST_NOLUN},    /* locks up */
110         {"QUANTUM", "PD1225S", "3110", BLIST_NOLUN},    /* locks up */
111         {"QUANTUM", "FIREBALL ST4.3S", "0F0C", BLIST_NOLUN},    /* locks up */
112         {"RELISYS", "Scorpio", NULL, BLIST_NOLUN},      /* responds to all lun */
113         {"SANKYO", "CP525", "6.64", BLIST_NOLUN},       /* causes failed REQ SENSE, extra reset */
114         {"TEXEL", "CD-ROM", "1.06", BLIST_NOLUN},
115         {"transtec", "T5008", "0001", BLIST_NOREPORTLUN },
116         {"YAMAHA", "CDR100", "1.00", BLIST_NOLUN},      /* locks up */
117         {"YAMAHA", "CDR102", "1.00", BLIST_NOLUN},      /* locks up */
118         {"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN},     /* locks up */
119         {"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN},    /* locks up */
120         {"", "Scanner", "1.80", BLIST_NOLUN},   /* responds to all lun */
121
122         /*
123          * Other types of devices that have special flags.
124          * Note that all USB devices should have the BLIST_INQUIRY_36 flag.
125          */
126         {"3PARdata", "VV", NULL, BLIST_REPORTLUN2},
127         {"ADAPTEC", "AACRAID", NULL, BLIST_FORCELUN},
128         {"ADAPTEC", "Adaptec 5400S", NULL, BLIST_FORCELUN},
129         {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN},
130         {"BELKIN", "USB 2 HS-CF", "1.95",  BLIST_FORCELUN | BLIST_INQUIRY_36},
131         {"BROWNIE", "1200U3P", NULL, BLIST_NOREPORTLUN},
132         {"BROWNIE", "1600U3P", NULL, BLIST_NOREPORTLUN},
133         {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
134         {"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36},
135         {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN},     /* CMD RAID Controller */
136         {"CNSI", "G7324", NULL, BLIST_SPARSELUN},       /* Chaparral G7324 RAID */
137         {"CNSi", "G8324", NULL, BLIST_SPARSELUN},       /* Chaparral G8324 RAID */
138         {"COMPAQ", "ARRAY CONTROLLER", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
139                 BLIST_MAX_512 | BLIST_REPORTLUN2},      /* Compaq RA4x00 */
140         {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN | BLIST_MAX_512}, /* Compaq RA4x00 */
141         {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
142         {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
143         {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
144         {"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
145         {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
146         {"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
147         {"DELL", "PV660F", NULL, BLIST_SPARSELUN},
148         {"DELL", "PV660F   PSEUDO", NULL, BLIST_SPARSELUN},
149         {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN},     /* Dell PV 530F */
150         {"DELL", "PV530F", NULL, BLIST_SPARSELUN},
151         {"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
152         {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, storage on LUN 0 */
153         {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, no storage on LUN 0 */
154         {"EMC",  "Invista", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
155         {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN},
156         {"EMULEX", "MD21/S2     ESDI", NULL, BLIST_SINGLELUN},
157         {"easyRAID", "16P", NULL, BLIST_NOREPORTLUN},
158         {"easyRAID", "X6P", NULL, BLIST_NOREPORTLUN},
159         {"easyRAID", "F8", NULL, BLIST_NOREPORTLUN},
160         {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
161         {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
162         {"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN | BLIST_INQUIRY_36},
163         {"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN | BLIST_INQUIRY_36},
164         {"HITACHI", "DF400", "*", BLIST_SPARSELUN},
165         {"HITACHI", "DF500", "*", BLIST_SPARSELUN},
166         {"HITACHI", "DF600", "*", BLIST_SPARSELUN},
167         {"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_ATTACH_PQ3 | BLIST_SPARSELUN | BLIST_LARGELUN},
168         {"HITACHI", "OPEN-E", "*", BLIST_ATTACH_PQ3 | BLIST_SPARSELUN | BLIST_LARGELUN},
169         {"HITACHI", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
170         {"HITACHI", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
171         {"HITACHI", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
172         {"HITACHI", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
173         {"HITACHI", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
174         {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN},       /* HP VA7400 */
175         {"HP", "OPEN-", "*", BLIST_REPORTLUN2}, /* HP XP Arrays */
176         {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
177         {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
178         {"HP", "C1557A", NULL, BLIST_FORCELUN},
179         {"HP", "C3323-300", "4269", BLIST_NOTQ},
180         {"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
181         {"HP", "DF400", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
182         {"HP", "DF500", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
183         {"HP", "DF600", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
184         {"HP", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
185         {"HP", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
186         {"HP", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
187         {"HP", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
188         {"HP", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
189         {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
190         {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
191         {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
192         {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
193         {"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
194         {"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
195         {"INSITE", "I325VM", NULL, BLIST_KEY},
196         {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
197         {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
198         {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
199         {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
200         {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
201         {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
202         {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
203         {"MICROP", "4110", NULL, BLIST_NOTQ},
204         {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
205         {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
206         {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
207         {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
208         {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
209         {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
210         {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
211         {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
212         {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
213         {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
214         {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
215         {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
216         {"Promise", "", NULL, BLIST_SPARSELUN},
217         {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
218         {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
219         {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
220         {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},    /* Chokes on tagged INQUIRY */
221         {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
222         {"SGI", "RAID3", "*", BLIST_SPARSELUN},
223         {"SGI", "RAID5", "*", BLIST_SPARSELUN},
224         {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
225         {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
226         {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
227         {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
228         {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
229         {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
230         {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
231         {"SUN", "T300", "*", BLIST_SPARSELUN},
232         {"SUN", "T4", "*", BLIST_SPARSELUN},
233         {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
234         {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
235         {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
236         {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
237         {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
238         {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
239         {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
240         {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
241         {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
242         {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
243         {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
244         {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
245         { NULL, NULL, NULL, 0 },
246 };
247
248 /*
249  * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
250  * devinfo vendor and model strings.
251  */
252 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
253                                 char *from, int compatible)
254 {
255         size_t from_length;
256
257         from_length = strlen(from);
258         strncpy(to, from, min(to_length, from_length));
259         if (from_length < to_length) {
260                 if (compatible) {
261                         /*
262                          * NUL terminate the string if it is short.
263                          */
264                         to[from_length] = '\0';
265                 } else {
266                         /* 
267                          * space pad the string if it is short. 
268                          */
269                         strncpy(&to[from_length], spaces,
270                                 to_length - from_length);
271                 }
272         }
273         if (from_length > to_length)
274                  printk(KERN_WARNING "%s: %s string '%s' is too long\n",
275                         __func__, name, from);
276 }
277
278 /**
279  * scsi_dev_info_list_add - add one dev_info list entry.
280  * @compatible: if true, null terminate short strings.  Otherwise space pad.
281  * @vendor:     vendor string
282  * @model:      model (product) string
283  * @strflags:   integer string
284  * @flags:      if strflags NULL, use this flag value
285  *
286  * Description:
287  *      Create and add one dev_info entry for @vendor, @model, @strflags or
288  *      @flag. If @compatible, add to the tail of the list, do not space
289  *      pad, and set devinfo->compatible. The scsi_static_device_list entries
290  *      are added with @compatible 1 and @clfags NULL.
291  *
292  * Returns: 0 OK, -error on failure.
293  **/
294 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
295                             char *strflags, int flags)
296 {
297         struct scsi_dev_info_list *devinfo;
298
299         devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
300         if (!devinfo) {
301                 printk(KERN_ERR "%s: no memory\n", __func__);
302                 return -ENOMEM;
303         }
304
305         scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
306                             vendor, compatible);
307         scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
308                             model, compatible);
309
310         if (strflags)
311                 devinfo->flags = simple_strtoul(strflags, NULL, 0);
312         else
313                 devinfo->flags = flags;
314
315         devinfo->compatible = compatible;
316
317         if (compatible)
318                 list_add_tail(&devinfo->dev_info_list, &scsi_dev_info_list);
319         else
320                 list_add(&devinfo->dev_info_list, &scsi_dev_info_list);
321
322         return 0;
323 }
324
325 /**
326  * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
327  * @dev_list:   string of device flags to add
328  *
329  * Description:
330  *      Parse dev_list, and add entries to the scsi_dev_info_list.
331  *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
332  *      dev_list is modified via strsep. Can be called for command line
333  *      addition, for proc or mabye a sysfs interface.
334  *
335  * Returns: 0 if OK, -error on failure.
336  **/
337 static int scsi_dev_info_list_add_str(char *dev_list)
338 {
339         char *vendor, *model, *strflags, *next;
340         char *next_check;
341         int res = 0;
342
343         next = dev_list;
344         if (next && next[0] == '"') {
345                 /*
346                  * Ignore both the leading and trailing quote.
347                  */
348                 next++;
349                 next_check = ",\"";
350         } else {
351                 next_check = ",";
352         }
353
354         /*
355          * For the leading and trailing '"' case, the for loop comes
356          * through the last time with vendor[0] == '\0'.
357          */
358         for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
359              && (res == 0); vendor = strsep(&next, ":")) {
360                 strflags = NULL;
361                 model = strsep(&next, ":");
362                 if (model)
363                         strflags = strsep(&next, next_check);
364                 if (!model || !strflags) {
365                         printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
366                                " '%s'\n", __func__, vendor, model,
367                                strflags);
368                         res = -EINVAL;
369                 } else
370                         res = scsi_dev_info_list_add(0 /* compatible */, vendor,
371                                                      model, strflags, 0);
372         }
373         return res;
374 }
375
376 /**
377  * get_device_flags - get device specific flags from the dynamic device list.
378  * @sdev:       &scsi_device to get flags for
379  * @vendor:     vendor name
380  * @model:      model name
381  *
382  * Description:
383  *     Search the scsi_dev_info_list for an entry matching @vendor and
384  *     @model, if found, return the matching flags value, else return
385  *     the host or global default settings.  Called during scan time.
386  **/
387 int scsi_get_device_flags(struct scsi_device *sdev,
388                           const unsigned char *vendor,
389                           const unsigned char *model)
390 {
391         struct scsi_dev_info_list *devinfo;
392         unsigned int bflags;
393
394         bflags = sdev->sdev_bflags;
395         if (!bflags)
396                 bflags = scsi_default_dev_flags;
397
398         list_for_each_entry(devinfo, &scsi_dev_info_list, dev_info_list) {
399                 if (devinfo->compatible) {
400                         /*
401                          * Behave like the older version of get_device_flags.
402                          */
403                         size_t max;
404                         /*
405                          * XXX why skip leading spaces? If an odd INQUIRY
406                          * value, that should have been part of the
407                          * scsi_static_device_list[] entry, such as "  FOO"
408                          * rather than "FOO". Since this code is already
409                          * here, and we don't know what device it is
410                          * trying to work with, leave it as-is.
411                          */
412                         max = 8;        /* max length of vendor */
413                         while ((max > 0) && *vendor == ' ') {
414                                 max--;
415                                 vendor++;
416                         }
417                         /*
418                          * XXX removing the following strlen() would be
419                          * good, using it means that for a an entry not in
420                          * the list, we scan every byte of every vendor
421                          * listed in scsi_static_device_list[], and never match
422                          * a single one (and still have to compare at
423                          * least the first byte of each vendor).
424                          */
425                         if (memcmp(devinfo->vendor, vendor,
426                                     min(max, strlen(devinfo->vendor))))
427                                 continue;
428                         /*
429                          * Skip spaces again.
430                          */
431                         max = 16;       /* max length of model */
432                         while ((max > 0) && *model == ' ') {
433                                 max--;
434                                 model++;
435                         }
436                         if (memcmp(devinfo->model, model,
437                                    min(max, strlen(devinfo->model))))
438                                 continue;
439                         return devinfo->flags;
440                 } else {
441                         if (!memcmp(devinfo->vendor, vendor,
442                                      sizeof(devinfo->vendor)) &&
443                              !memcmp(devinfo->model, model,
444                                       sizeof(devinfo->model)))
445                                 return devinfo->flags;
446                 }
447         }
448         return bflags;
449 }
450
451 #ifdef CONFIG_SCSI_PROC_FS
452 static int devinfo_seq_show(struct seq_file *m, void *v)
453 {
454         struct scsi_dev_info_list *devinfo =
455                 list_entry(v, struct scsi_dev_info_list, dev_info_list);
456
457         seq_printf(m, "'%.8s' '%.16s' 0x%x\n",
458                         devinfo->vendor, devinfo->model, devinfo->flags);
459         return 0;
460 }
461
462 static void * devinfo_seq_start(struct seq_file *m, loff_t *pos)
463 {
464         return seq_list_start(&scsi_dev_info_list, *pos);
465 }
466
467 static void * devinfo_seq_next(struct seq_file *m, void *v, loff_t *pos)
468 {
469         return seq_list_next(v, &scsi_dev_info_list, pos);
470 }
471
472 static void devinfo_seq_stop(struct seq_file *m, void *v)
473 {
474 }
475
476 static const struct seq_operations scsi_devinfo_seq_ops = {
477         .start  = devinfo_seq_start,
478         .next   = devinfo_seq_next,
479         .stop   = devinfo_seq_stop,
480         .show   = devinfo_seq_show,
481 };
482
483 static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
484 {
485         return seq_open(file, &scsi_devinfo_seq_ops);
486 }
487
488 /* 
489  * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
490  *
491  * Description: Adds a black/white list entry for vendor and model with an
492  * integer value of flag to the scsi device info list.
493  * To use, echo "vendor:model:flag" > /proc/scsi/device_info
494  */
495 static ssize_t proc_scsi_devinfo_write(struct file *file,
496                                        const char __user *buf,
497                                        size_t length, loff_t *ppos)
498 {
499         char *buffer;
500         ssize_t err = length;
501
502         if (!buf || length>PAGE_SIZE)
503                 return -EINVAL;
504         if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
505                 return -ENOMEM;
506         if (copy_from_user(buffer, buf, length)) {
507                 err =-EFAULT;
508                 goto out;
509         }
510
511         if (length < PAGE_SIZE)
512                 buffer[length] = '\0';
513         else if (buffer[PAGE_SIZE-1]) {
514                 err = -EINVAL;
515                 goto out;
516         }
517
518         scsi_dev_info_list_add_str(buffer);
519
520 out:
521         free_page((unsigned long)buffer);
522         return err;
523 }
524
525 static const struct file_operations scsi_devinfo_proc_fops = {
526         .owner          = THIS_MODULE,
527         .open           = proc_scsi_devinfo_open,
528         .read           = seq_read,
529         .write          = proc_scsi_devinfo_write,
530         .llseek         = seq_lseek,
531         .release        = seq_release,
532 };
533 #endif /* CONFIG_SCSI_PROC_FS */
534
535 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
536 MODULE_PARM_DESC(dev_flags,
537          "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
538          " list entries for vendor and model with an integer value of flags"
539          " to the scsi device info list");
540
541 module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
542 MODULE_PARM_DESC(default_dev_flags,
543                  "scsi default device flag integer value");
544
545 /**
546  * scsi_dev_info_list_delete - called from scsi.c:exit_scsi to remove the scsi_dev_info_list.
547  **/
548 void scsi_exit_devinfo(void)
549 {
550         struct list_head *lh, *lh_next;
551         struct scsi_dev_info_list *devinfo;
552
553 #ifdef CONFIG_SCSI_PROC_FS
554         remove_proc_entry("scsi/device_info", NULL);
555 #endif
556
557         list_for_each_safe(lh, lh_next, &scsi_dev_info_list) {
558                 devinfo = list_entry(lh, struct scsi_dev_info_list,
559                                      dev_info_list);
560                 kfree(devinfo);
561         }
562 }
563
564 /**
565  * scsi_init_devinfo - set up the dynamic device list.
566  *
567  * Description:
568  *      Add command line entries from scsi_dev_flags, then add
569  *      scsi_static_device_list entries to the scsi device info list.
570  */
571 int __init scsi_init_devinfo(void)
572 {
573 #ifdef CONFIG_SCSI_PROC_FS
574         struct proc_dir_entry *p;
575 #endif
576         int error, i;
577
578         error = scsi_dev_info_list_add_str(scsi_dev_flags);
579         if (error)
580                 return error;
581
582         for (i = 0; scsi_static_device_list[i].vendor; i++) {
583                 error = scsi_dev_info_list_add(1 /* compatibile */,
584                                 scsi_static_device_list[i].vendor,
585                                 scsi_static_device_list[i].model,
586                                 NULL,
587                                 scsi_static_device_list[i].flags);
588                 if (error)
589                         goto out;
590         }
591
592 #ifdef CONFIG_SCSI_PROC_FS
593         p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_fops);
594         if (!p) {
595                 error = -ENOMEM;
596                 goto out;
597         }
598
599         p->owner = THIS_MODULE;
600 #endif /* CONFIG_SCSI_PROC_FS */
601
602  out:
603         if (error)
604                 scsi_exit_devinfo();
605         return error;
606 }