Merge tag 'ntb-4.6' of git://github.com/jonmason/ntb
[linux-2.6-microblaze.git] / 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 #include <linux/slab.h>
10
11 #include <scsi/scsi_device.h>
12 #include <scsi/scsi_devinfo.h>
13
14 #include "scsi_priv.h"
15
16
17 /*
18  * scsi_dev_info_list: structure to hold black/white listed devices.
19  */
20 struct scsi_dev_info_list {
21         struct list_head dev_info_list;
22         char vendor[8];
23         char model[16];
24         unsigned flags;
25         unsigned compatible; /* for use with scsi_static_device_list entries */
26 };
27
28 struct scsi_dev_info_list_table {
29         struct list_head node;  /* our node for being on the master list */
30         struct list_head scsi_dev_info_list; /* head of dev info list */
31         const char *name;       /* name of list for /proc (NULL for global) */
32         int key;                /* unique numeric identifier */
33 };
34
35
36 static const char spaces[] = "                "; /* 16 of them */
37 static unsigned scsi_default_dev_flags;
38 static LIST_HEAD(scsi_dev_info_list);
39 static char scsi_dev_flags[256];
40
41 /*
42  * scsi_static_device_list: deprecated list of devices that require
43  * settings that differ from the default, includes black-listed (broken)
44  * devices. The entries here are added to the tail of scsi_dev_info_list
45  * via scsi_dev_info_list_init.
46  *
47  * Do not add to this list, use the command line or proc interface to add
48  * to the scsi_dev_info_list. This table will eventually go away.
49  */
50 static struct {
51         char *vendor;
52         char *model;
53         char *revision; /* revision known to be bad, unused */
54         unsigned flags;
55 } scsi_static_device_list[] __initdata = {
56         /*
57          * The following devices are known not to tolerate a lun != 0 scan
58          * for one reason or another. Some will respond to all luns,
59          * others will lock up.
60          */
61         {"Aashima", "IMAGERY 2400SP", "1.03", BLIST_NOLUN},     /* locks up */
62         {"CHINON", "CD-ROM CDS-431", "H42", BLIST_NOLUN},       /* locks up */
63         {"CHINON", "CD-ROM CDS-535", "Q14", BLIST_NOLUN},       /* locks up */
64         {"DENON", "DRD-25X", "V", BLIST_NOLUN},                 /* locks up */
65         {"HITACHI", "DK312C", "CM81", BLIST_NOLUN},     /* responds to all lun */
66         {"HITACHI", "DK314C", "CR21", BLIST_NOLUN},     /* responds to all lun */
67         {"IBM", "2104-DU3", NULL, BLIST_NOLUN},         /* locks up */
68         {"IBM", "2104-TU3", NULL, BLIST_NOLUN},         /* locks up */
69         {"IMS", "CDD521/10", "2.06", BLIST_NOLUN},      /* locks up */
70         {"MAXTOR", "XT-3280", "PR02", BLIST_NOLUN},     /* locks up */
71         {"MAXTOR", "XT-4380S", "B3C", BLIST_NOLUN},     /* locks up */
72         {"MAXTOR", "MXT-1240S", "I1.2", BLIST_NOLUN},   /* locks up */
73         {"MAXTOR", "XT-4170S", "B5A", BLIST_NOLUN},     /* locks up */
74         {"MAXTOR", "XT-8760S", "B7B", BLIST_NOLUN},     /* locks up */
75         {"MEDIAVIS", "RENO CD-ROMX2A", "2.03", BLIST_NOLUN},    /* responds to all lun */
76         {"MICROTEK", "ScanMakerIII", "2.30", BLIST_NOLUN},      /* responds to all lun */
77         {"NEC", "CD-ROM DRIVE:841", "1.0", BLIST_NOLUN},/* locks up */
78         {"PHILIPS", "PCA80SC", "V4-2", BLIST_NOLUN},    /* responds to all lun */
79         {"RODIME", "RO3000S", "2.33", BLIST_NOLUN},     /* locks up */
80         {"SUN", "SENA", NULL, BLIST_NOLUN},             /* responds to all luns */
81         /*
82          * The following causes a failed REQUEST SENSE on lun 1 for
83          * aha152x controller, which causes SCSI code to reset bus.
84          */
85         {"SANYO", "CRD-250S", "1.20", BLIST_NOLUN},
86         /*
87          * The following causes a failed REQUEST SENSE on lun 1 for
88          * aha152x controller, which causes SCSI code to reset bus.
89          */
90         {"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN},
91         {"SEAGATE", "ST296", "921", BLIST_NOLUN},       /* responds to all lun */
92         {"SEAGATE", "ST1581", "6538", BLIST_NOLUN},     /* responds to all lun */
93         {"SONY", "CD-ROM CDU-541", "4.3d", BLIST_NOLUN},
94         {"SONY", "CD-ROM CDU-55S", "1.0i", BLIST_NOLUN},
95         {"SONY", "CD-ROM CDU-561", "1.7x", BLIST_NOLUN},
96         {"SONY", "CD-ROM CDU-8012", NULL, BLIST_NOLUN},
97         {"SONY", "SDT-5000", "3.17", BLIST_SELECT_NO_ATN},
98         {"TANDBERG", "TDC 3600", "U07", BLIST_NOLUN},   /* locks up */
99         {"TEAC", "CD-R55S", "1.0H", BLIST_NOLUN},       /* locks up */
100         /*
101          * The following causes a failed REQUEST SENSE on lun 1 for
102          * seagate controller, which causes SCSI code to reset bus.
103          */
104         {"TEAC", "CD-ROM", "1.06", BLIST_NOLUN},
105         {"TEAC", "MT-2ST/45S2-27", "RV M", BLIST_NOLUN},        /* responds to all lun */
106         /*
107          * The following causes a failed REQUEST SENSE on lun 1 for
108          * seagate controller, which causes SCSI code to reset bus.
109          */
110         {"HP", "C1750A", "3226", BLIST_NOLUN},          /* scanjet iic */
111         {"HP", "C1790A", "", BLIST_NOLUN},              /* scanjet iip */
112         {"HP", "C2500A", "", BLIST_NOLUN},              /* scanjet iicx */
113         {"MEDIAVIS", "CDR-H93MV", "1.31", BLIST_NOLUN}, /* locks up */
114         {"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN},      /* responds to all lun */
115         {"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN},     /* locks up */
116         {"NEC", "D3856", "0009", BLIST_NOLUN},
117         {"QUANTUM", "LPS525S", "3110", BLIST_NOLUN},    /* locks up */
118         {"QUANTUM", "PD1225S", "3110", BLIST_NOLUN},    /* locks up */
119         {"QUANTUM", "FIREBALL ST4.3S", "0F0C", BLIST_NOLUN},    /* locks up */
120         {"RELISYS", "Scorpio", NULL, BLIST_NOLUN},      /* responds to all lun */
121         {"SANKYO", "CP525", "6.64", BLIST_NOLUN},       /* causes failed REQ SENSE, extra reset */
122         {"TEXEL", "CD-ROM", "1.06", BLIST_NOLUN},
123         {"transtec", "T5008", "0001", BLIST_NOREPORTLUN },
124         {"YAMAHA", "CDR100", "1.00", BLIST_NOLUN},      /* locks up */
125         {"YAMAHA", "CDR102", "1.00", BLIST_NOLUN},      /* locks up */
126         {"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN},     /* locks up */
127         {"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN},    /* locks up */
128         {"", "Scanner", "1.80", BLIST_NOLUN},   /* responds to all lun */
129
130         /*
131          * Other types of devices that have special flags.
132          * Note that all USB devices should have the BLIST_INQUIRY_36 flag.
133          */
134         {"3PARdata", "VV", NULL, BLIST_REPORTLUN2},
135         {"ADAPTEC", "AACRAID", NULL, BLIST_FORCELUN},
136         {"ADAPTEC", "Adaptec 5400S", NULL, BLIST_FORCELUN},
137         {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN},
138         {"BELKIN", "USB 2 HS-CF", "1.95",  BLIST_FORCELUN | BLIST_INQUIRY_36},
139         {"BROWNIE", "1200U3P", NULL, BLIST_NOREPORTLUN},
140         {"BROWNIE", "1600U3P", NULL, BLIST_NOREPORTLUN},
141         {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
142         {"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36},
143         {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN},     /* CMD RAID Controller */
144         {"CNSI", "G7324", NULL, BLIST_SPARSELUN},       /* Chaparral G7324 RAID */
145         {"CNSi", "G8324", NULL, BLIST_SPARSELUN},       /* Chaparral G8324 RAID */
146         {"COMPAQ", "ARRAY CONTROLLER", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
147                 BLIST_MAX_512 | BLIST_REPORTLUN2},      /* Compaq RA4x00 */
148         {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN | BLIST_MAX_512}, /* Compaq RA4x00 */
149         {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
150         {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
151         {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
152         {"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
153         {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
154         {"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
155         {"DELL", "PV660F", NULL, BLIST_SPARSELUN},
156         {"DELL", "PV660F   PSEUDO", NULL, BLIST_SPARSELUN},
157         {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN},     /* Dell PV 530F */
158         {"DELL", "PV530F", NULL, BLIST_SPARSELUN},
159         {"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
160         {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, storage on LUN 0 */
161         {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* Dell PV 650F, no storage on LUN 0 */
162         {"EMC",  "Invista", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
163         {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN},
164         {"EMULEX", "MD21/S2     ESDI", NULL, BLIST_SINGLELUN},
165         {"easyRAID", "16P", NULL, BLIST_NOREPORTLUN},
166         {"easyRAID", "X6P", NULL, BLIST_NOREPORTLUN},
167         {"easyRAID", "F8", NULL, BLIST_NOREPORTLUN},
168         {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
169         {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
170         {"Generic", "USB Storage-SMC", "0180", BLIST_FORCELUN | BLIST_INQUIRY_36},
171         {"Generic", "USB Storage-SMC", "0207", BLIST_FORCELUN | BLIST_INQUIRY_36},
172         {"HITACHI", "DF400", "*", BLIST_REPORTLUN2},
173         {"HITACHI", "DF500", "*", BLIST_REPORTLUN2},
174         {"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_REPORTLUN2},
175         {"HITACHI", "HUS1530", "*", BLIST_NO_DIF},
176         {"HITACHI", "OPEN-", "*", BLIST_REPORTLUN2},
177         {"HITACHI", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
178         {"HITACHI", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
179         {"HITACHI", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
180         {"HITACHI", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
181         {"HITACHI", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
182         {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN},       /* HP VA7400 */
183         {"HP", "OPEN-", "*", BLIST_REPORTLUN2}, /* HP XP Arrays */
184         {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
185         {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
186         {"HP", "C1557A", NULL, BLIST_FORCELUN},
187         {"HP", "C3323-300", "4269", BLIST_NOTQ},
188         {"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
189         {"HP", "DF400", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
190         {"HP", "DF500", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
191         {"HP", "DF600", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
192         {"HP", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
193         {"HP", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
194         {"HP", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
195         {"HP", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
196         {"HP", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
197         {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
198         {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
199         {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
200         {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
201         {"IOMEGA", "ZIP", NULL, BLIST_NOTQ | BLIST_NOLUN},
202         {"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
203         {"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
204         {"INSITE", "I325VM", NULL, BLIST_KEY},
205         {"Intel", "Multi-Flex", NULL, BLIST_NO_RSOC},
206         {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
207         {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
208         {"Marvell", "Console", NULL, BLIST_SKIP_VPD_PAGES},
209         {"Marvell", "91xx Config", "1.01", BLIST_SKIP_VPD_PAGES},
210         {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
211         {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
212         {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
213         {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
214         {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
215         {"MICROP", "4110", NULL, BLIST_NOTQ},
216         {"MSFT", "Virtual HD", NULL, BLIST_NO_RSOC},
217         {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
218         {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
219         {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
220         {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
221         {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
222         {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
223         {"NETAPP", "LUN C-Mode", NULL, BLIST_SYNC_ALUA},
224         {"NETAPP", "INF-01-00", NULL, BLIST_SYNC_ALUA},
225         {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
226         {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
227         {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
228         {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
229         {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
230         {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
231         {"Promise", "VTrak E610f", NULL, BLIST_SPARSELUN | BLIST_NO_RSOC},
232         {"Promise", "", NULL, BLIST_SPARSELUN},
233         {"QNAP", "iSCSI Storage", NULL, BLIST_MAX_1024},
234         {"SYNOLOGY", "iSCSI Storage", NULL, BLIST_MAX_1024},
235         {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
236         {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
237         {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
238         {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},    /* Chokes on tagged INQUIRY */
239         {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
240         {"SEAGATE", "ST900MM0006", NULL, BLIST_SKIP_VPD_PAGES},
241         {"SGI", "RAID3", "*", BLIST_SPARSELUN},
242         {"SGI", "RAID5", "*", BLIST_SPARSELUN},
243         {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
244         {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
245         {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
246         {"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
247         {"DELL", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
248         {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
249         {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
250         {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
251         {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
252         {"SUN", "T300", "*", BLIST_SPARSELUN},
253         {"SUN", "T4", "*", BLIST_SPARSELUN},
254         {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
255         {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
256         {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
257         {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
258         {"Traxdata", "CDR4120", NULL, BLIST_NOLUN},     /* locks up */
259         {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
260         {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
261         {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
262         {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
263         {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
264         {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
265         {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
266         {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
267         { NULL, NULL, NULL, 0 },
268 };
269
270 static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
271 {
272         struct scsi_dev_info_list_table *devinfo_table;
273         int found = 0;
274
275         list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
276                 if (devinfo_table->key == key) {
277                         found = 1;
278                         break;
279                 }
280         if (!found)
281                 return ERR_PTR(-EINVAL);
282
283         return devinfo_table;
284 }
285
286 /*
287  * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
288  * devinfo vendor and model strings.
289  */
290 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
291                                 char *from, int compatible)
292 {
293         size_t from_length;
294
295         from_length = strlen(from);
296         strncpy(to, from, min(to_length, from_length));
297         if (from_length < to_length) {
298                 if (compatible) {
299                         /*
300                          * NUL terminate the string if it is short.
301                          */
302                         to[from_length] = '\0';
303                 } else {
304                         /* 
305                          * space pad the string if it is short. 
306                          */
307                         strncpy(&to[from_length], spaces,
308                                 to_length - from_length);
309                 }
310         }
311         if (from_length > to_length)
312                  printk(KERN_WARNING "%s: %s string '%s' is too long\n",
313                         __func__, name, from);
314 }
315
316 /**
317  * scsi_dev_info_list_add - add one dev_info list entry.
318  * @compatible: if true, null terminate short strings.  Otherwise space pad.
319  * @vendor:     vendor string
320  * @model:      model (product) string
321  * @strflags:   integer string
322  * @flags:      if strflags NULL, use this flag value
323  *
324  * Description:
325  *      Create and add one dev_info entry for @vendor, @model, @strflags or
326  *      @flag. If @compatible, add to the tail of the list, do not space
327  *      pad, and set devinfo->compatible. The scsi_static_device_list entries
328  *      are added with @compatible 1 and @clfags NULL.
329  *
330  * Returns: 0 OK, -error on failure.
331  **/
332 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
333                             char *strflags, int flags)
334 {
335         return scsi_dev_info_list_add_keyed(compatible, vendor, model,
336                                             strflags, flags,
337                                             SCSI_DEVINFO_GLOBAL);
338 }
339
340 /**
341  * scsi_dev_info_list_add_keyed - add one dev_info list entry.
342  * @compatible: if true, null terminate short strings.  Otherwise space pad.
343  * @vendor:     vendor string
344  * @model:      model (product) string
345  * @strflags:   integer string
346  * @flags:      if strflags NULL, use this flag value
347  * @key:        specify list to use
348  *
349  * Description:
350  *      Create and add one dev_info entry for @vendor, @model,
351  *      @strflags or @flag in list specified by @key. If @compatible,
352  *      add to the tail of the list, do not space pad, and set
353  *      devinfo->compatible. The scsi_static_device_list entries are
354  *      added with @compatible 1 and @clfags NULL.
355  *
356  * Returns: 0 OK, -error on failure.
357  **/
358 int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
359                                  char *strflags, int flags, int key)
360 {
361         struct scsi_dev_info_list *devinfo;
362         struct scsi_dev_info_list_table *devinfo_table =
363                 scsi_devinfo_lookup_by_key(key);
364
365         if (IS_ERR(devinfo_table))
366                 return PTR_ERR(devinfo_table);
367
368         devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
369         if (!devinfo) {
370                 printk(KERN_ERR "%s: no memory\n", __func__);
371                 return -ENOMEM;
372         }
373
374         scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
375                             vendor, compatible);
376         scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
377                             model, compatible);
378
379         if (strflags)
380                 devinfo->flags = simple_strtoul(strflags, NULL, 0);
381         else
382                 devinfo->flags = flags;
383
384         devinfo->compatible = compatible;
385
386         if (compatible)
387                 list_add_tail(&devinfo->dev_info_list,
388                               &devinfo_table->scsi_dev_info_list);
389         else
390                 list_add(&devinfo->dev_info_list,
391                          &devinfo_table->scsi_dev_info_list);
392
393         return 0;
394 }
395 EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
396
397 /**
398  * scsi_dev_info_list_find - find a matching dev_info list entry.
399  * @vendor:     vendor string
400  * @model:      model (product) string
401  * @key:        specify list to use
402  *
403  * Description:
404  *      Finds the first dev_info entry matching @vendor, @model
405  *      in list specified by @key.
406  *
407  * Returns: pointer to matching entry, or ERR_PTR on failure.
408  **/
409 static struct scsi_dev_info_list *scsi_dev_info_list_find(const char *vendor,
410                 const char *model, int key)
411 {
412         struct scsi_dev_info_list *devinfo;
413         struct scsi_dev_info_list_table *devinfo_table =
414                 scsi_devinfo_lookup_by_key(key);
415         size_t vmax, mmax;
416         const char *vskip, *mskip;
417
418         if (IS_ERR(devinfo_table))
419                 return (struct scsi_dev_info_list *) devinfo_table;
420
421         /* Prepare for "compatible" matches */
422
423         /*
424          * XXX why skip leading spaces? If an odd INQUIRY
425          * value, that should have been part of the
426          * scsi_static_device_list[] entry, such as "  FOO"
427          * rather than "FOO". Since this code is already
428          * here, and we don't know what device it is
429          * trying to work with, leave it as-is.
430          */
431         vmax = 8;       /* max length of vendor */
432         vskip = vendor;
433         while (vmax > 0 && *vskip == ' ') {
434                 vmax--;
435                 vskip++;
436         }
437         /* Also skip trailing spaces */
438         while (vmax > 0 && vskip[vmax - 1] == ' ')
439                 --vmax;
440
441         mmax = 16;      /* max length of model */
442         mskip = model;
443         while (mmax > 0 && *mskip == ' ') {
444                 mmax--;
445                 mskip++;
446         }
447         while (mmax > 0 && mskip[mmax - 1] == ' ')
448                 --mmax;
449
450         list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
451                             dev_info_list) {
452                 if (devinfo->compatible) {
453                         /*
454                          * Behave like the older version of get_device_flags.
455                          */
456                         if (memcmp(devinfo->vendor, vskip, vmax) ||
457                                         devinfo->vendor[vmax])
458                                 continue;
459                         if (memcmp(devinfo->model, mskip, mmax) ||
460                                         devinfo->model[mmax])
461                                 continue;
462                         return devinfo;
463                 } else {
464                         if (!memcmp(devinfo->vendor, vendor,
465                                      sizeof(devinfo->vendor)) &&
466                              !memcmp(devinfo->model, model,
467                                       sizeof(devinfo->model)))
468                                 return devinfo;
469                 }
470         }
471
472         return ERR_PTR(-ENOENT);
473 }
474
475 /**
476  * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
477  * @vendor:     vendor string
478  * @model:      model (product) string
479  * @key:        specify list to use
480  *
481  * Description:
482  *      Remove and destroy one dev_info entry for @vendor, @model
483  *      in list specified by @key.
484  *
485  * Returns: 0 OK, -error on failure.
486  **/
487 int scsi_dev_info_list_del_keyed(char *vendor, char *model, int key)
488 {
489         struct scsi_dev_info_list *found;
490
491         found = scsi_dev_info_list_find(vendor, model, key);
492         if (IS_ERR(found))
493                 return PTR_ERR(found);
494
495         list_del(&found->dev_info_list);
496         kfree(found);
497         return 0;
498 }
499 EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
500
501 /**
502  * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
503  * @dev_list:   string of device flags to add
504  *
505  * Description:
506  *      Parse dev_list, and add entries to the scsi_dev_info_list.
507  *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
508  *      dev_list is modified via strsep. Can be called for command line
509  *      addition, for proc or mabye a sysfs interface.
510  *
511  * Returns: 0 if OK, -error on failure.
512  **/
513 static int scsi_dev_info_list_add_str(char *dev_list)
514 {
515         char *vendor, *model, *strflags, *next;
516         char *next_check;
517         int res = 0;
518
519         next = dev_list;
520         if (next && next[0] == '"') {
521                 /*
522                  * Ignore both the leading and trailing quote.
523                  */
524                 next++;
525                 next_check = ",\"";
526         } else {
527                 next_check = ",";
528         }
529
530         /*
531          * For the leading and trailing '"' case, the for loop comes
532          * through the last time with vendor[0] == '\0'.
533          */
534         for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
535              && (res == 0); vendor = strsep(&next, ":")) {
536                 strflags = NULL;
537                 model = strsep(&next, ":");
538                 if (model)
539                         strflags = strsep(&next, next_check);
540                 if (!model || !strflags) {
541                         printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
542                                " '%s'\n", __func__, vendor, model,
543                                strflags);
544                         res = -EINVAL;
545                 } else
546                         res = scsi_dev_info_list_add(0 /* compatible */, vendor,
547                                                      model, strflags, 0);
548         }
549         return res;
550 }
551
552 /**
553  * get_device_flags - get device specific flags from the dynamic device list.
554  * @sdev:       &scsi_device to get flags for
555  * @vendor:     vendor name
556  * @model:      model name
557  *
558  * Description:
559  *     Search the global scsi_dev_info_list (specified by list zero)
560  *     for an entry matching @vendor and @model, if found, return the
561  *     matching flags value, else return the host or global default
562  *     settings.  Called during scan time.
563  **/
564 int scsi_get_device_flags(struct scsi_device *sdev,
565                           const unsigned char *vendor,
566                           const unsigned char *model)
567 {
568         return scsi_get_device_flags_keyed(sdev, vendor, model,
569                                            SCSI_DEVINFO_GLOBAL);
570 }
571
572
573 /**
574  * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
575  * @sdev:       &scsi_device to get flags for
576  * @vendor:     vendor name
577  * @model:      model name
578  * @key:        list to look up
579  *
580  * Description:
581  *     Search the scsi_dev_info_list specified by @key for an entry
582  *     matching @vendor and @model, if found, return the matching
583  *     flags value, else return the host or global default settings.
584  *     Called during scan time.
585  **/
586 int scsi_get_device_flags_keyed(struct scsi_device *sdev,
587                                 const unsigned char *vendor,
588                                 const unsigned char *model,
589                                 int key)
590 {
591         struct scsi_dev_info_list *devinfo;
592         int err;
593
594         devinfo = scsi_dev_info_list_find(vendor, model, key);
595         if (!IS_ERR(devinfo))
596                 return devinfo->flags;
597
598         err = PTR_ERR(devinfo);
599         if (err != -ENOENT)
600                 return err;
601
602         /* nothing found, return nothing */
603         if (key != SCSI_DEVINFO_GLOBAL)
604                 return 0;
605
606         /* except for the global list, where we have an exception */
607         if (sdev->sdev_bflags)
608                 return sdev->sdev_bflags;
609
610         return scsi_default_dev_flags;
611 }
612 EXPORT_SYMBOL(scsi_get_device_flags_keyed);
613
614 #ifdef CONFIG_SCSI_PROC_FS
615 struct double_list {
616         struct list_head *top;
617         struct list_head *bottom;
618 };
619
620 static int devinfo_seq_show(struct seq_file *m, void *v)
621 {
622         struct double_list *dl = v;
623         struct scsi_dev_info_list_table *devinfo_table =
624                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
625         struct scsi_dev_info_list *devinfo =
626                 list_entry(dl->bottom, struct scsi_dev_info_list,
627                            dev_info_list);
628
629         if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
630             devinfo_table->name)
631                 seq_printf(m, "[%s]:\n", devinfo_table->name);
632
633         seq_printf(m, "'%.8s' '%.16s' 0x%x\n",
634                    devinfo->vendor, devinfo->model, devinfo->flags);
635         return 0;
636 }
637
638 static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
639 {
640         struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
641         loff_t pos = *ppos;
642
643         if (!dl)
644                 return NULL;
645
646         list_for_each(dl->top, &scsi_dev_info_list) {
647                 struct scsi_dev_info_list_table *devinfo_table =
648                         list_entry(dl->top, struct scsi_dev_info_list_table,
649                                    node);
650                 list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
651                         if (pos-- == 0)
652                                 return dl;
653         }
654
655         kfree(dl);
656         return NULL;
657 }
658
659 static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
660 {
661         struct double_list *dl = v;
662         struct scsi_dev_info_list_table *devinfo_table =
663                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
664
665         ++*ppos;
666         dl->bottom = dl->bottom->next;
667         while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
668                 dl->top = dl->top->next;
669                 if (dl->top == &scsi_dev_info_list) {
670                         kfree(dl);
671                         return NULL;
672                 }
673                 devinfo_table = list_entry(dl->top,
674                                            struct scsi_dev_info_list_table,
675                                            node);
676                 dl->bottom = devinfo_table->scsi_dev_info_list.next;
677         }
678
679         return dl;
680 }
681
682 static void devinfo_seq_stop(struct seq_file *m, void *v)
683 {
684         kfree(v);
685 }
686
687 static const struct seq_operations scsi_devinfo_seq_ops = {
688         .start  = devinfo_seq_start,
689         .next   = devinfo_seq_next,
690         .stop   = devinfo_seq_stop,
691         .show   = devinfo_seq_show,
692 };
693
694 static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
695 {
696         return seq_open(file, &scsi_devinfo_seq_ops);
697 }
698
699 /* 
700  * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
701  *
702  * Description: Adds a black/white list entry for vendor and model with an
703  * integer value of flag to the scsi device info list.
704  * To use, echo "vendor:model:flag" > /proc/scsi/device_info
705  */
706 static ssize_t proc_scsi_devinfo_write(struct file *file,
707                                        const char __user *buf,
708                                        size_t length, loff_t *ppos)
709 {
710         char *buffer;
711         ssize_t err = length;
712
713         if (!buf || length>PAGE_SIZE)
714                 return -EINVAL;
715         if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
716                 return -ENOMEM;
717         if (copy_from_user(buffer, buf, length)) {
718                 err =-EFAULT;
719                 goto out;
720         }
721
722         if (length < PAGE_SIZE)
723                 buffer[length] = '\0';
724         else if (buffer[PAGE_SIZE-1]) {
725                 err = -EINVAL;
726                 goto out;
727         }
728
729         scsi_dev_info_list_add_str(buffer);
730
731 out:
732         free_page((unsigned long)buffer);
733         return err;
734 }
735
736 static const struct file_operations scsi_devinfo_proc_fops = {
737         .owner          = THIS_MODULE,
738         .open           = proc_scsi_devinfo_open,
739         .read           = seq_read,
740         .write          = proc_scsi_devinfo_write,
741         .llseek         = seq_lseek,
742         .release        = seq_release,
743 };
744 #endif /* CONFIG_SCSI_PROC_FS */
745
746 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
747 MODULE_PARM_DESC(dev_flags,
748          "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
749          " list entries for vendor and model with an integer value of flags"
750          " to the scsi device info list");
751
752 module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
753 MODULE_PARM_DESC(default_dev_flags,
754                  "scsi default device flag integer value");
755
756 /**
757  * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
758  **/
759 void scsi_exit_devinfo(void)
760 {
761 #ifdef CONFIG_SCSI_PROC_FS
762         remove_proc_entry("scsi/device_info", NULL);
763 #endif
764
765         scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
766 }
767
768 /**
769  * scsi_dev_info_add_list - add a new devinfo list
770  * @key:        key of the list to add
771  * @name:       Name of the list to add (for /proc/scsi/device_info)
772  *
773  * Adds the requested list, returns zero on success, -EEXIST if the
774  * key is already registered to a list, or other error on failure.
775  */
776 int scsi_dev_info_add_list(int key, const char *name)
777 {
778         struct scsi_dev_info_list_table *devinfo_table =
779                 scsi_devinfo_lookup_by_key(key);
780
781         if (!IS_ERR(devinfo_table))
782                 /* list already exists */
783                 return -EEXIST;
784
785         devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
786
787         if (!devinfo_table)
788                 return -ENOMEM;
789
790         INIT_LIST_HEAD(&devinfo_table->node);
791         INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
792         devinfo_table->name = name;
793         devinfo_table->key = key;
794         list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
795
796         return 0;
797 }
798 EXPORT_SYMBOL(scsi_dev_info_add_list);
799
800 /**
801  * scsi_dev_info_remove_list - destroy an added devinfo list
802  * @key: key of the list to destroy
803  *
804  * Iterates over the entire list first, freeing all the values, then
805  * frees the list itself.  Returns 0 on success or -EINVAL if the key
806  * can't be found.
807  */
808 int scsi_dev_info_remove_list(int key)
809 {
810         struct list_head *lh, *lh_next;
811         struct scsi_dev_info_list_table *devinfo_table =
812                 scsi_devinfo_lookup_by_key(key);
813
814         if (IS_ERR(devinfo_table))
815                 /* no such list */
816                 return -EINVAL;
817
818         /* remove from the master list */
819         list_del(&devinfo_table->node);
820
821         list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
822                 struct scsi_dev_info_list *devinfo;
823
824                 devinfo = list_entry(lh, struct scsi_dev_info_list,
825                                      dev_info_list);
826                 kfree(devinfo);
827         }
828         kfree(devinfo_table);
829
830         return 0;
831 }
832 EXPORT_SYMBOL(scsi_dev_info_remove_list);
833
834 /**
835  * scsi_init_devinfo - set up the dynamic device list.
836  *
837  * Description:
838  *      Add command line entries from scsi_dev_flags, then add
839  *      scsi_static_device_list entries to the scsi device info list.
840  */
841 int __init scsi_init_devinfo(void)
842 {
843 #ifdef CONFIG_SCSI_PROC_FS
844         struct proc_dir_entry *p;
845 #endif
846         int error, i;
847
848         error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
849         if (error)
850                 return error;
851
852         error = scsi_dev_info_list_add_str(scsi_dev_flags);
853         if (error)
854                 goto out;
855
856         for (i = 0; scsi_static_device_list[i].vendor; i++) {
857                 error = scsi_dev_info_list_add(1 /* compatibile */,
858                                 scsi_static_device_list[i].vendor,
859                                 scsi_static_device_list[i].model,
860                                 NULL,
861                                 scsi_static_device_list[i].flags);
862                 if (error)
863                         goto out;
864         }
865
866 #ifdef CONFIG_SCSI_PROC_FS
867         p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_fops);
868         if (!p) {
869                 error = -ENOMEM;
870                 goto out;
871         }
872 #endif /* CONFIG_SCSI_PROC_FS */
873
874  out:
875         if (error)
876                 scsi_exit_devinfo();
877         return error;
878 }