[SCSI] ses: add subenclosure support
[linux-2.6.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", "OPEN-", "*", BLIST_REPORTLUN2},
176         {"HITACHI", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
177         {"HITACHI", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
178         {"HITACHI", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
179         {"HITACHI", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
180         {"HITACHI", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
181         {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN},       /* HP VA7400 */
182         {"HP", "OPEN-", "*", BLIST_REPORTLUN2}, /* HP XP Arrays */
183         {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
184         {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
185         {"HP", "C1557A", NULL, BLIST_FORCELUN},
186         {"HP", "C3323-300", "4269", BLIST_NOTQ},
187         {"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
188         {"HP", "DF400", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
189         {"HP", "DF500", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
190         {"HP", "DF600", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
191         {"HP", "OP-C-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
192         {"HP", "3380-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
193         {"HP", "3390-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
194         {"HP", "6586-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
195         {"HP", "6588-", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
196         {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
197         {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
198         {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
199         {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
200         {"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
201         {"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
202         {"INSITE", "I325VM", NULL, BLIST_KEY},
203         {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
204         {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
205         {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
206         {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
207         {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
208         {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
209         {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
210         {"MICROP", "4110", NULL, BLIST_NOTQ},
211         {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
212         {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
213         {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
214         {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
215         {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
216         {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
217         {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
218         {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
219         {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
220         {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
221         {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
222         {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
223         {"Promise", "", NULL, BLIST_SPARSELUN},
224         {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
225         {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
226         {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
227         {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},    /* Chokes on tagged INQUIRY */
228         {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
229         {"SGI", "RAID3", "*", BLIST_SPARSELUN},
230         {"SGI", "RAID5", "*", BLIST_SPARSELUN},
231         {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
232         {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
233         {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
234         {"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
235         {"DELL", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
236         {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
237         {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
238         {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
239         {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
240         {"SUN", "T300", "*", BLIST_SPARSELUN},
241         {"SUN", "T4", "*", BLIST_SPARSELUN},
242         {"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
243         {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
244         {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
245         {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
246         {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
247         {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
248         {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
249         {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
250         {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
251         {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
252         {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
253         {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
254         { NULL, NULL, NULL, 0 },
255 };
256
257 static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
258 {
259         struct scsi_dev_info_list_table *devinfo_table;
260         int found = 0;
261
262         list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
263                 if (devinfo_table->key == key) {
264                         found = 1;
265                         break;
266                 }
267         if (!found)
268                 return ERR_PTR(-EINVAL);
269
270         return devinfo_table;
271 }
272
273 /*
274  * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
275  * devinfo vendor and model strings.
276  */
277 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
278                                 char *from, int compatible)
279 {
280         size_t from_length;
281
282         from_length = strlen(from);
283         strncpy(to, from, min(to_length, from_length));
284         if (from_length < to_length) {
285                 if (compatible) {
286                         /*
287                          * NUL terminate the string if it is short.
288                          */
289                         to[from_length] = '\0';
290                 } else {
291                         /* 
292                          * space pad the string if it is short. 
293                          */
294                         strncpy(&to[from_length], spaces,
295                                 to_length - from_length);
296                 }
297         }
298         if (from_length > to_length)
299                  printk(KERN_WARNING "%s: %s string '%s' is too long\n",
300                         __func__, name, from);
301 }
302
303 /**
304  * scsi_dev_info_list_add - add one dev_info list entry.
305  * @compatible: if true, null terminate short strings.  Otherwise space pad.
306  * @vendor:     vendor string
307  * @model:      model (product) string
308  * @strflags:   integer string
309  * @flags:      if strflags NULL, use this flag value
310  *
311  * Description:
312  *      Create and add one dev_info entry for @vendor, @model, @strflags or
313  *      @flag. If @compatible, add to the tail of the list, do not space
314  *      pad, and set devinfo->compatible. The scsi_static_device_list entries
315  *      are added with @compatible 1 and @clfags NULL.
316  *
317  * Returns: 0 OK, -error on failure.
318  **/
319 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
320                             char *strflags, int flags)
321 {
322         return scsi_dev_info_list_add_keyed(compatible, vendor, model,
323                                             strflags, flags,
324                                             SCSI_DEVINFO_GLOBAL);
325 }
326
327 /**
328  * scsi_dev_info_list_add_keyed - add one dev_info list entry.
329  * @compatible: if true, null terminate short strings.  Otherwise space pad.
330  * @vendor:     vendor string
331  * @model:      model (product) string
332  * @strflags:   integer string
333  * @flags:      if strflags NULL, use this flag value
334  * @key:        specify list to use
335  *
336  * Description:
337  *      Create and add one dev_info entry for @vendor, @model,
338  *      @strflags or @flag in list specified by @key. If @compatible,
339  *      add to the tail of the list, do not space pad, and set
340  *      devinfo->compatible. The scsi_static_device_list entries are
341  *      added with @compatible 1 and @clfags NULL.
342  *
343  * Returns: 0 OK, -error on failure.
344  **/
345 int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
346                                  char *strflags, int flags, int key)
347 {
348         struct scsi_dev_info_list *devinfo;
349         struct scsi_dev_info_list_table *devinfo_table =
350                 scsi_devinfo_lookup_by_key(key);
351
352         if (IS_ERR(devinfo_table))
353                 return PTR_ERR(devinfo_table);
354
355         devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
356         if (!devinfo) {
357                 printk(KERN_ERR "%s: no memory\n", __func__);
358                 return -ENOMEM;
359         }
360
361         scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
362                             vendor, compatible);
363         scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
364                             model, compatible);
365
366         if (strflags)
367                 devinfo->flags = simple_strtoul(strflags, NULL, 0);
368         else
369                 devinfo->flags = flags;
370
371         devinfo->compatible = compatible;
372
373         if (compatible)
374                 list_add_tail(&devinfo->dev_info_list,
375                               &devinfo_table->scsi_dev_info_list);
376         else
377                 list_add(&devinfo->dev_info_list,
378                          &devinfo_table->scsi_dev_info_list);
379
380         return 0;
381 }
382 EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
383
384 /**
385  * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
386  * @vendor:     vendor string
387  * @model:      model (product) string
388  * @key:        specify list to use
389  *
390  * Description:
391  *      Remove and destroy one dev_info entry for @vendor, @model
392  *      in list specified by @key.
393  *
394  * Returns: 0 OK, -error on failure.
395  **/
396 int scsi_dev_info_list_del_keyed(char *vendor, char *model, int key)
397 {
398         struct scsi_dev_info_list *devinfo, *found = NULL;
399         struct scsi_dev_info_list_table *devinfo_table =
400                 scsi_devinfo_lookup_by_key(key);
401
402         if (IS_ERR(devinfo_table))
403                 return PTR_ERR(devinfo_table);
404
405         list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
406                             dev_info_list) {
407                 if (devinfo->compatible) {
408                         /*
409                          * Behave like the older version of get_device_flags.
410                          */
411                         size_t max;
412                         /*
413                          * XXX why skip leading spaces? If an odd INQUIRY
414                          * value, that should have been part of the
415                          * scsi_static_device_list[] entry, such as "  FOO"
416                          * rather than "FOO". Since this code is already
417                          * here, and we don't know what device it is
418                          * trying to work with, leave it as-is.
419                          */
420                         max = 8;        /* max length of vendor */
421                         while ((max > 0) && *vendor == ' ') {
422                                 max--;
423                                 vendor++;
424                         }
425                         /*
426                          * XXX removing the following strlen() would be
427                          * good, using it means that for a an entry not in
428                          * the list, we scan every byte of every vendor
429                          * listed in scsi_static_device_list[], and never match
430                          * a single one (and still have to compare at
431                          * least the first byte of each vendor).
432                          */
433                         if (memcmp(devinfo->vendor, vendor,
434                                     min(max, strlen(devinfo->vendor))))
435                                 continue;
436                         /*
437                          * Skip spaces again.
438                          */
439                         max = 16;       /* max length of model */
440                         while ((max > 0) && *model == ' ') {
441                                 max--;
442                                 model++;
443                         }
444                         if (memcmp(devinfo->model, model,
445                                    min(max, strlen(devinfo->model))))
446                                 continue;
447                         found = devinfo;
448                 } else {
449                         if (!memcmp(devinfo->vendor, vendor,
450                                      sizeof(devinfo->vendor)) &&
451                              !memcmp(devinfo->model, model,
452                                       sizeof(devinfo->model)))
453                                 found = devinfo;
454                 }
455                 if (found)
456                         break;
457         }
458
459         if (found) {
460                 list_del(&found->dev_info_list);
461                 kfree(found);
462                 return 0;
463         }
464
465         return -ENOENT;
466 }
467 EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
468
469 /**
470  * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
471  * @dev_list:   string of device flags to add
472  *
473  * Description:
474  *      Parse dev_list, and add entries to the scsi_dev_info_list.
475  *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
476  *      dev_list is modified via strsep. Can be called for command line
477  *      addition, for proc or mabye a sysfs interface.
478  *
479  * Returns: 0 if OK, -error on failure.
480  **/
481 static int scsi_dev_info_list_add_str(char *dev_list)
482 {
483         char *vendor, *model, *strflags, *next;
484         char *next_check;
485         int res = 0;
486
487         next = dev_list;
488         if (next && next[0] == '"') {
489                 /*
490                  * Ignore both the leading and trailing quote.
491                  */
492                 next++;
493                 next_check = ",\"";
494         } else {
495                 next_check = ",";
496         }
497
498         /*
499          * For the leading and trailing '"' case, the for loop comes
500          * through the last time with vendor[0] == '\0'.
501          */
502         for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
503              && (res == 0); vendor = strsep(&next, ":")) {
504                 strflags = NULL;
505                 model = strsep(&next, ":");
506                 if (model)
507                         strflags = strsep(&next, next_check);
508                 if (!model || !strflags) {
509                         printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
510                                " '%s'\n", __func__, vendor, model,
511                                strflags);
512                         res = -EINVAL;
513                 } else
514                         res = scsi_dev_info_list_add(0 /* compatible */, vendor,
515                                                      model, strflags, 0);
516         }
517         return res;
518 }
519
520 /**
521  * get_device_flags - get device specific flags from the dynamic device list.
522  * @sdev:       &scsi_device to get flags for
523  * @vendor:     vendor name
524  * @model:      model name
525  *
526  * Description:
527  *     Search the global scsi_dev_info_list (specified by list zero)
528  *     for an entry matching @vendor and @model, if found, return the
529  *     matching flags value, else return the host or global default
530  *     settings.  Called during scan time.
531  **/
532 int scsi_get_device_flags(struct scsi_device *sdev,
533                           const unsigned char *vendor,
534                           const unsigned char *model)
535 {
536         return scsi_get_device_flags_keyed(sdev, vendor, model,
537                                            SCSI_DEVINFO_GLOBAL);
538 }
539
540
541 /**
542  * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
543  * @sdev:       &scsi_device to get flags for
544  * @vendor:     vendor name
545  * @model:      model name
546  * @key:        list to look up
547  *
548  * Description:
549  *     Search the scsi_dev_info_list specified by @key for an entry
550  *     matching @vendor and @model, if found, return the matching
551  *     flags value, else return the host or global default settings.
552  *     Called during scan time.
553  **/
554 int scsi_get_device_flags_keyed(struct scsi_device *sdev,
555                                 const unsigned char *vendor,
556                                 const unsigned char *model,
557                                 int key)
558 {
559         struct scsi_dev_info_list *devinfo;
560         struct scsi_dev_info_list_table *devinfo_table;
561
562         devinfo_table = scsi_devinfo_lookup_by_key(key);
563
564         if (IS_ERR(devinfo_table))
565                 return PTR_ERR(devinfo_table);
566
567         list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
568                             dev_info_list) {
569                 if (devinfo->compatible) {
570                         /*
571                          * Behave like the older version of get_device_flags.
572                          */
573                         size_t max;
574                         /*
575                          * XXX why skip leading spaces? If an odd INQUIRY
576                          * value, that should have been part of the
577                          * scsi_static_device_list[] entry, such as "  FOO"
578                          * rather than "FOO". Since this code is already
579                          * here, and we don't know what device it is
580                          * trying to work with, leave it as-is.
581                          */
582                         max = 8;        /* max length of vendor */
583                         while ((max > 0) && *vendor == ' ') {
584                                 max--;
585                                 vendor++;
586                         }
587                         /*
588                          * XXX removing the following strlen() would be
589                          * good, using it means that for a an entry not in
590                          * the list, we scan every byte of every vendor
591                          * listed in scsi_static_device_list[], and never match
592                          * a single one (and still have to compare at
593                          * least the first byte of each vendor).
594                          */
595                         if (memcmp(devinfo->vendor, vendor,
596                                     min(max, strlen(devinfo->vendor))))
597                                 continue;
598                         /*
599                          * Skip spaces again.
600                          */
601                         max = 16;       /* max length of model */
602                         while ((max > 0) && *model == ' ') {
603                                 max--;
604                                 model++;
605                         }
606                         if (memcmp(devinfo->model, model,
607                                    min(max, strlen(devinfo->model))))
608                                 continue;
609                         return devinfo->flags;
610                 } else {
611                         if (!memcmp(devinfo->vendor, vendor,
612                                      sizeof(devinfo->vendor)) &&
613                              !memcmp(devinfo->model, model,
614                                       sizeof(devinfo->model)))
615                                 return devinfo->flags;
616                 }
617         }
618         /* nothing found, return nothing */
619         if (key != SCSI_DEVINFO_GLOBAL)
620                 return 0;
621
622         /* except for the global list, where we have an exception */
623         if (sdev->sdev_bflags)
624                 return sdev->sdev_bflags;
625
626         return scsi_default_dev_flags;
627 }
628 EXPORT_SYMBOL(scsi_get_device_flags_keyed);
629
630 #ifdef CONFIG_SCSI_PROC_FS
631 struct double_list {
632         struct list_head *top;
633         struct list_head *bottom;
634 };
635
636 static int devinfo_seq_show(struct seq_file *m, void *v)
637 {
638         struct double_list *dl = v;
639         struct scsi_dev_info_list_table *devinfo_table =
640                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
641         struct scsi_dev_info_list *devinfo =
642                 list_entry(dl->bottom, struct scsi_dev_info_list,
643                            dev_info_list);
644
645         if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
646             devinfo_table->name)
647                 seq_printf(m, "[%s]:\n", devinfo_table->name);
648
649         seq_printf(m, "'%.8s' '%.16s' 0x%x\n",
650                    devinfo->vendor, devinfo->model, devinfo->flags);
651         return 0;
652 }
653
654 static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
655 {
656         struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
657         loff_t pos = *ppos;
658
659         if (!dl)
660                 return NULL;
661
662         list_for_each(dl->top, &scsi_dev_info_list) {
663                 struct scsi_dev_info_list_table *devinfo_table =
664                         list_entry(dl->top, struct scsi_dev_info_list_table,
665                                    node);
666                 list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
667                         if (pos-- == 0)
668                                 return dl;
669         }
670
671         kfree(dl);
672         return NULL;
673 }
674
675 static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
676 {
677         struct double_list *dl = v;
678         struct scsi_dev_info_list_table *devinfo_table =
679                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
680
681         ++*ppos;
682         dl->bottom = dl->bottom->next;
683         while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
684                 dl->top = dl->top->next;
685                 if (dl->top == &scsi_dev_info_list) {
686                         kfree(dl);
687                         return NULL;
688                 }
689                 devinfo_table = list_entry(dl->top,
690                                            struct scsi_dev_info_list_table,
691                                            node);
692                 dl->bottom = devinfo_table->scsi_dev_info_list.next;
693         }
694
695         return dl;
696 }
697
698 static void devinfo_seq_stop(struct seq_file *m, void *v)
699 {
700         kfree(v);
701 }
702
703 static const struct seq_operations scsi_devinfo_seq_ops = {
704         .start  = devinfo_seq_start,
705         .next   = devinfo_seq_next,
706         .stop   = devinfo_seq_stop,
707         .show   = devinfo_seq_show,
708 };
709
710 static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
711 {
712         return seq_open(file, &scsi_devinfo_seq_ops);
713 }
714
715 /* 
716  * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
717  *
718  * Description: Adds a black/white list entry for vendor and model with an
719  * integer value of flag to the scsi device info list.
720  * To use, echo "vendor:model:flag" > /proc/scsi/device_info
721  */
722 static ssize_t proc_scsi_devinfo_write(struct file *file,
723                                        const char __user *buf,
724                                        size_t length, loff_t *ppos)
725 {
726         char *buffer;
727         ssize_t err = length;
728
729         if (!buf || length>PAGE_SIZE)
730                 return -EINVAL;
731         if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
732                 return -ENOMEM;
733         if (copy_from_user(buffer, buf, length)) {
734                 err =-EFAULT;
735                 goto out;
736         }
737
738         if (length < PAGE_SIZE)
739                 buffer[length] = '\0';
740         else if (buffer[PAGE_SIZE-1]) {
741                 err = -EINVAL;
742                 goto out;
743         }
744
745         scsi_dev_info_list_add_str(buffer);
746
747 out:
748         free_page((unsigned long)buffer);
749         return err;
750 }
751
752 static const struct file_operations scsi_devinfo_proc_fops = {
753         .owner          = THIS_MODULE,
754         .open           = proc_scsi_devinfo_open,
755         .read           = seq_read,
756         .write          = proc_scsi_devinfo_write,
757         .llseek         = seq_lseek,
758         .release        = seq_release,
759 };
760 #endif /* CONFIG_SCSI_PROC_FS */
761
762 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
763 MODULE_PARM_DESC(dev_flags,
764          "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
765          " list entries for vendor and model with an integer value of flags"
766          " to the scsi device info list");
767
768 module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
769 MODULE_PARM_DESC(default_dev_flags,
770                  "scsi default device flag integer value");
771
772 /**
773  * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
774  **/
775 void scsi_exit_devinfo(void)
776 {
777 #ifdef CONFIG_SCSI_PROC_FS
778         remove_proc_entry("scsi/device_info", NULL);
779 #endif
780
781         scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
782 }
783
784 /**
785  * scsi_dev_info_add_list - add a new devinfo list
786  * @key:        key of the list to add
787  * @name:       Name of the list to add (for /proc/scsi/device_info)
788  *
789  * Adds the requested list, returns zero on success, -EEXIST if the
790  * key is already registered to a list, or other error on failure.
791  */
792 int scsi_dev_info_add_list(int key, const char *name)
793 {
794         struct scsi_dev_info_list_table *devinfo_table =
795                 scsi_devinfo_lookup_by_key(key);
796
797         if (!IS_ERR(devinfo_table))
798                 /* list already exists */
799                 return -EEXIST;
800
801         devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
802
803         if (!devinfo_table)
804                 return -ENOMEM;
805
806         INIT_LIST_HEAD(&devinfo_table->node);
807         INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
808         devinfo_table->name = name;
809         devinfo_table->key = key;
810         list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
811
812         return 0;
813 }
814 EXPORT_SYMBOL(scsi_dev_info_add_list);
815
816 /**
817  * scsi_dev_info_remove_list - destroy an added devinfo list
818  * @key: key of the list to destroy
819  *
820  * Iterates over the entire list first, freeing all the values, then
821  * frees the list itself.  Returns 0 on success or -EINVAL if the key
822  * can't be found.
823  */
824 int scsi_dev_info_remove_list(int key)
825 {
826         struct list_head *lh, *lh_next;
827         struct scsi_dev_info_list_table *devinfo_table =
828                 scsi_devinfo_lookup_by_key(key);
829
830         if (IS_ERR(devinfo_table))
831                 /* no such list */
832                 return -EINVAL;
833
834         /* remove from the master list */
835         list_del(&devinfo_table->node);
836
837         list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
838                 struct scsi_dev_info_list *devinfo;
839
840                 devinfo = list_entry(lh, struct scsi_dev_info_list,
841                                      dev_info_list);
842                 kfree(devinfo);
843         }
844         kfree(devinfo_table);
845
846         return 0;
847 }
848 EXPORT_SYMBOL(scsi_dev_info_remove_list);
849
850 /**
851  * scsi_init_devinfo - set up the dynamic device list.
852  *
853  * Description:
854  *      Add command line entries from scsi_dev_flags, then add
855  *      scsi_static_device_list entries to the scsi device info list.
856  */
857 int __init scsi_init_devinfo(void)
858 {
859 #ifdef CONFIG_SCSI_PROC_FS
860         struct proc_dir_entry *p;
861 #endif
862         int error, i;
863
864         error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
865         if (error)
866                 return error;
867
868         error = scsi_dev_info_list_add_str(scsi_dev_flags);
869         if (error)
870                 goto out;
871
872         for (i = 0; scsi_static_device_list[i].vendor; i++) {
873                 error = scsi_dev_info_list_add(1 /* compatibile */,
874                                 scsi_static_device_list[i].vendor,
875                                 scsi_static_device_list[i].model,
876                                 NULL,
877                                 scsi_static_device_list[i].flags);
878                 if (error)
879                         goto out;
880         }
881
882 #ifdef CONFIG_SCSI_PROC_FS
883         p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_fops);
884         if (!p) {
885                 error = -ENOMEM;
886                 goto out;
887         }
888 #endif /* CONFIG_SCSI_PROC_FS */
889
890  out:
891         if (error)
892                 scsi_exit_devinfo();
893         return error;
894 }