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