GNU Linux-libre 5.10.219-gnu1
[releases.git] / drivers / scsi / scsi_devinfo.c
1 // SPDX-License-Identifier: GPL-2.0
2
3 #include <linux/blkdev.h>
4 #include <linux/init.h>
5 #include <linux/kernel.h>
6 #include <linux/module.h>
7 #include <linux/moduleparam.h>
8 #include <linux/proc_fs.h>
9 #include <linux/seq_file.h>
10 #include <linux/slab.h>
11
12 #include <scsi/scsi_device.h>
13 #include <scsi/scsi_devinfo.h>
14
15 #include "scsi_priv.h"
16
17
18 /*
19  * scsi_dev_info_list: structure to hold black/white listed devices.
20  */
21 struct scsi_dev_info_list {
22         struct list_head dev_info_list;
23         char vendor[8];
24         char model[16];
25         blist_flags_t flags;
26         unsigned compatible; /* for use with scsi_static_device_list entries */
27 };
28
29 struct scsi_dev_info_list_table {
30         struct list_head node;  /* our node for being on the master list */
31         struct list_head scsi_dev_info_list; /* head of dev info list */
32         const char *name;       /* name of list for /proc (NULL for global) */
33         int key;                /* unique numeric identifier */
34 };
35
36
37 static blist_flags_t 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         blist_flags_t 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", NULL, BLIST_NOLUN},            /* scanjet iip */
112         {"HP", "C2500A", NULL, 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 | BLIST_BORKEN},
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         {"AIX", "VDASD", NULL, BLIST_TRY_VPD_PAGES},
138         {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN},
139         {"BELKIN", "USB 2 HS-CF", "1.95",  BLIST_FORCELUN | BLIST_INQUIRY_36},
140         {"BROWNIE", "1200U3P", NULL, BLIST_NOREPORTLUN},
141         {"BROWNIE", "1600U3P", NULL, BLIST_NOREPORTLUN},
142         {"CANON", "IPUBJD", NULL, BLIST_SPARSELUN},
143         {"CBOX3", "USB Storage-SMC", "300A", BLIST_FORCELUN | BLIST_INQUIRY_36},
144         {"CMD", "CRA-7280", NULL, BLIST_SPARSELUN},     /* CMD RAID Controller */
145         {"CNSI", "G7324", NULL, BLIST_SPARSELUN},       /* Chaparral G7324 RAID */
146         {"CNSi", "G8324", NULL, BLIST_SPARSELUN},       /* Chaparral G8324 RAID */
147         {"COMPAQ", "ARRAY CONTROLLER", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
148                 BLIST_MAX_512 | BLIST_REPORTLUN2},      /* Compaq RA4x00 */
149         {"COMPAQ", "LOGICAL VOLUME", NULL, BLIST_FORCELUN | BLIST_MAX_512}, /* Compaq RA4x00 */
150         {"COMPAQ", "CR3500", NULL, BLIST_FORCELUN},
151         {"COMPAQ", "MSA1000", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
152         {"COMPAQ", "MSA1000 VOLUME", NULL, BLIST_SPARSELUN | BLIST_NOSTARTONADD},
153         {"COMPAQ", "HSV110", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
154         {"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
155         {"DEC", "HSG80", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
156         {"DELL", "PV660F", NULL, BLIST_SPARSELUN},
157         {"DELL", "PV660F   PSEUDO", NULL, BLIST_SPARSELUN},
158         {"DELL", "PSEUDO DEVICE .", NULL, BLIST_SPARSELUN},     /* Dell PV 530F */
159         {"DELL", "PV530F", NULL, BLIST_SPARSELUN},
160         {"DELL", "PERCRAID", NULL, BLIST_FORCELUN},
161         {"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* EMC CLARiiON, storage on LUN 0 */
162         {"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* EMC CLARiiON, no storage on LUN 0 */
163         {"EMC",  "Invista", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
164         {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
165          BLIST_REPORTLUN2 | BLIST_RETRY_ITF},
166         {"EMULEX", "MD21/S2     ESDI", NULL, BLIST_SINGLELUN},
167         {"easyRAID", "16P", NULL, BLIST_NOREPORTLUN},
168         {"easyRAID", "X6P", NULL, BLIST_NOREPORTLUN},
169         {"easyRAID", "F8", NULL, BLIST_NOREPORTLUN},
170         {"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
171         {"FUJITSU", "ETERNUS_DXM", "*", BLIST_RETRY_ASC_C1},
172         {"Generic", "USB SD Reader", "1.00", BLIST_FORCELUN | BLIST_INQUIRY_36},
173         {"Generic", "USB Storage-SMC", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36}, /* FW: 0180 and 0207 */
174         {"HITACHI", "DF400", "*", BLIST_REPORTLUN2},
175         {"HITACHI", "DF500", "*", BLIST_REPORTLUN2},
176         {"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_REPORTLUN2},
177         {"HITACHI", "HUS1530", "*", BLIST_NO_DIF},
178         {"HITACHI", "OPEN-", "*", BLIST_REPORTLUN2 | BLIST_TRY_VPD_PAGES},
179         {"HP", "A6189A", NULL, BLIST_SPARSELUN | BLIST_LARGELUN},       /* HP VA7400 */
180         {"HP", "OPEN-", "*", BLIST_REPORTLUN2 | BLIST_TRY_VPD_PAGES}, /* HP XP Arrays */
181         {"HP", "NetRAID-4M", NULL, BLIST_FORCELUN},
182         {"HP", "HSV100", NULL, BLIST_REPORTLUN2 | BLIST_NOSTARTONADD},
183         {"HP", "C1557A", NULL, BLIST_FORCELUN},
184         {"HP", "C3323-300", "4269", BLIST_NOTQ},
185         {"HP", "C5713A", NULL, BLIST_NOREPORTLUN},
186         {"HP", "DISK-SUBSYSTEM", "*", BLIST_REPORTLUN2},
187         {"HPE", "OPEN-", "*", BLIST_REPORTLUN2 | BLIST_TRY_VPD_PAGES},
188         {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
189         {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
190         {"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
191         {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
192         {"IOMEGA", "ZIP", NULL, BLIST_NOTQ | BLIST_NOLUN},
193         {"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
194         {"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
195         {"INSITE", "I325VM", NULL, BLIST_KEY},
196         {"Intel", "Multi-Flex", NULL, BLIST_NO_RSOC},
197         {"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
198         {"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
199         {"Marvell", "Console", NULL, BLIST_SKIP_VPD_PAGES},
200         {"Marvell", "91xx Config", "1.01", BLIST_SKIP_VPD_PAGES},
201         {"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
202         {"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
203         {"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
204         {"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
205         {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
206         {"MICROP", "4110", NULL, BLIST_NOTQ},
207         {"MSFT", "Virtual HD", NULL, BLIST_MAX_1024 | BLIST_NO_RSOC},
208         {"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
209         {"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
210         {"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
211         {"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
212         {"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
213         {"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
214         {"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
215         {"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
216         {"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
217         {"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
218         {"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
219         {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
220         {"Promise", "VTrak E610f", NULL, BLIST_SPARSELUN | BLIST_NO_RSOC},
221         {"Promise", "", NULL, BLIST_SPARSELUN},
222         {"QEMU", "QEMU CD-ROM", NULL, BLIST_SKIP_VPD_PAGES},
223         {"QNAP", "iSCSI Storage", NULL, BLIST_MAX_1024},
224         {"SYNOLOGY", "iSCSI Storage", NULL, BLIST_MAX_1024},
225         {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
226         {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
227         {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
228         {"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},    /* Chokes on tagged INQUIRY */
229         {"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
230         {"SEAGATE", "ST900MM0006", NULL, BLIST_SKIP_VPD_PAGES},
231         {"SGI", "RAID3", "*", BLIST_SPARSELUN},
232         {"SGI", "RAID5", "*", BLIST_SPARSELUN},
233         {"SGI", "TP9100", "*", BLIST_REPORTLUN2},
234         {"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
235         {"SKhynix", "H28U74301AMR", NULL, BLIST_SKIP_VPD_PAGES},
236         {"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
237         {"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
238         {"DELL", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
239         {"STK", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
240         {"NETAPP", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
241         {"LSI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
242         {"ENGENIO", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
243         {"LENOVO", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
244         {"FUJITSU", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
245         {"SanDisk", "Cruzer Blade", NULL, BLIST_TRY_VPD_PAGES |
246                 BLIST_INQUIRY_36},
247         {"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
248         {"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
249         {"SONY", "TSL", NULL, BLIST_FORCELUN},          /* DDS3 & DDS4 autoloaders */
250         {"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
251         {"SUN", "T300", "*", BLIST_SPARSELUN},
252         {"SUN", "T4", "*", BLIST_SPARSELUN},
253         {"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
254         {"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
255         {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
256         {"Traxdata", "CDR4120", NULL, BLIST_NOLUN},     /* locks up */
257         {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
258         {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
259         {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
260         {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
261         {"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
262         {"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
263         {"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
264         {"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
265         { NULL, NULL, NULL, 0 },
266 };
267
268 static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
269 {
270         struct scsi_dev_info_list_table *devinfo_table;
271         int found = 0;
272
273         list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
274                 if (devinfo_table->key == key) {
275                         found = 1;
276                         break;
277                 }
278         if (!found)
279                 return ERR_PTR(-EINVAL);
280
281         return devinfo_table;
282 }
283
284 /*
285  * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
286  * devinfo vendor and model strings.
287  */
288 static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
289                                 char *from, int compatible)
290 {
291         size_t from_length;
292
293         from_length = strlen(from);
294         /* This zero-pads the destination */
295         strncpy(to, from, to_length);
296         if (from_length < to_length && !compatible) {
297                 /*
298                  * space pad the string if it is short.
299                  */
300                 memset(&to[from_length], ' ', to_length - from_length);
301         }
302         if (from_length > to_length)
303                  printk(KERN_WARNING "%s: %s string '%s' is too long\n",
304                         __func__, name, from);
305 }
306
307 /**
308  * scsi_dev_info_list_add - add one dev_info list entry.
309  * @compatible: if true, null terminate short strings.  Otherwise space pad.
310  * @vendor:     vendor string
311  * @model:      model (product) string
312  * @strflags:   integer string
313  * @flags:      if strflags NULL, use this flag value
314  *
315  * Description:
316  *      Create and add one dev_info entry for @vendor, @model, @strflags or
317  *      @flag. If @compatible, add to the tail of the list, do not space
318  *      pad, and set devinfo->compatible. The scsi_static_device_list entries
319  *      are added with @compatible 1 and @clfags NULL.
320  *
321  * Returns: 0 OK, -error on failure.
322  **/
323 static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
324                             char *strflags, blist_flags_t flags)
325 {
326         return scsi_dev_info_list_add_keyed(compatible, vendor, model,
327                                             strflags, flags,
328                                             SCSI_DEVINFO_GLOBAL);
329 }
330
331 /**
332  * scsi_dev_info_list_add_keyed - add one dev_info list entry.
333  * @compatible: if true, null terminate short strings.  Otherwise space pad.
334  * @vendor:     vendor string
335  * @model:      model (product) string
336  * @strflags:   integer string
337  * @flags:      if strflags NULL, use this flag value
338  * @key:        specify list to use
339  *
340  * Description:
341  *      Create and add one dev_info entry for @vendor, @model,
342  *      @strflags or @flag in list specified by @key. If @compatible,
343  *      add to the tail of the list, do not space pad, and set
344  *      devinfo->compatible. The scsi_static_device_list entries are
345  *      added with @compatible 1 and @clfags NULL.
346  *
347  * Returns: 0 OK, -error on failure.
348  **/
349 int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
350                                  char *strflags, blist_flags_t flags,
351                                  enum scsi_devinfo_key key)
352 {
353         struct scsi_dev_info_list *devinfo;
354         struct scsi_dev_info_list_table *devinfo_table =
355                 scsi_devinfo_lookup_by_key(key);
356
357         if (IS_ERR(devinfo_table))
358                 return PTR_ERR(devinfo_table);
359
360         devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
361         if (!devinfo) {
362                 printk(KERN_ERR "%s: no memory\n", __func__);
363                 return -ENOMEM;
364         }
365
366         scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
367                             vendor, compatible);
368         scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
369                             model, compatible);
370
371         if (strflags) {
372                 unsigned long long val;
373                 int ret = kstrtoull(strflags, 0, &val);
374
375                 if (ret != 0) {
376                         kfree(devinfo);
377                         return ret;
378                 }
379                 flags = (__force blist_flags_t)val;
380         }
381         if (flags & __BLIST_UNUSED_MASK) {
382                 pr_err("scsi_devinfo (%s:%s): unsupported flags 0x%llx",
383                        vendor, model, flags & __BLIST_UNUSED_MASK);
384                 kfree(devinfo);
385                 return -EINVAL;
386         }
387         devinfo->flags = flags;
388         devinfo->compatible = compatible;
389
390         if (compatible)
391                 list_add_tail(&devinfo->dev_info_list,
392                               &devinfo_table->scsi_dev_info_list);
393         else
394                 list_add(&devinfo->dev_info_list,
395                          &devinfo_table->scsi_dev_info_list);
396
397         return 0;
398 }
399 EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
400
401 /**
402  * scsi_dev_info_list_find - find a matching dev_info list entry.
403  * @vendor:     full vendor string
404  * @model:      full model (product) string
405  * @key:        specify list to use
406  *
407  * Description:
408  *      Finds the first dev_info entry matching @vendor, @model
409  *      in list specified by @key.
410  *
411  * Returns: pointer to matching entry, or ERR_PTR on failure.
412  **/
413 static struct scsi_dev_info_list *scsi_dev_info_list_find(const char *vendor,
414                 const char *model, enum scsi_devinfo_key key)
415 {
416         struct scsi_dev_info_list *devinfo;
417         struct scsi_dev_info_list_table *devinfo_table =
418                 scsi_devinfo_lookup_by_key(key);
419         size_t vmax, mmax, mlen;
420         const char *vskip, *mskip;
421
422         if (IS_ERR(devinfo_table))
423                 return (struct scsi_dev_info_list *) devinfo_table;
424
425         /* Prepare for "compatible" matches */
426
427         /*
428          * XXX why skip leading spaces? If an odd INQUIRY
429          * value, that should have been part of the
430          * scsi_static_device_list[] entry, such as "  FOO"
431          * rather than "FOO". Since this code is already
432          * here, and we don't know what device it is
433          * trying to work with, leave it as-is.
434          */
435         vmax = sizeof(devinfo->vendor);
436         vskip = vendor;
437         while (vmax > 0 && *vskip == ' ') {
438                 vmax--;
439                 vskip++;
440         }
441         /* Also skip trailing spaces */
442         while (vmax > 0 && vskip[vmax - 1] == ' ')
443                 --vmax;
444
445         mmax = sizeof(devinfo->model);
446         mskip = model;
447         while (mmax > 0 && *mskip == ' ') {
448                 mmax--;
449                 mskip++;
450         }
451         while (mmax > 0 && mskip[mmax - 1] == ' ')
452                 --mmax;
453
454         list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
455                             dev_info_list) {
456                 if (devinfo->compatible) {
457                         /*
458                          * vendor strings must be an exact match
459                          */
460                         if (vmax != strnlen(devinfo->vendor,
461                                             sizeof(devinfo->vendor)) ||
462                             memcmp(devinfo->vendor, vskip, vmax))
463                                 continue;
464
465                         /*
466                          * @model specifies the full string, and
467                          * must be larger or equal to devinfo->model
468                          */
469                         mlen = strnlen(devinfo->model, sizeof(devinfo->model));
470                         if (mmax < mlen || memcmp(devinfo->model, mskip, mlen))
471                                 continue;
472                         return devinfo;
473                 } else {
474                         if (!memcmp(devinfo->vendor, vendor,
475                                     sizeof(devinfo->vendor)) &&
476                             !memcmp(devinfo->model, model,
477                                     sizeof(devinfo->model)))
478                                 return devinfo;
479                 }
480         }
481
482         return ERR_PTR(-ENOENT);
483 }
484
485 /**
486  * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
487  * @vendor:     vendor string
488  * @model:      model (product) string
489  * @key:        specify list to use
490  *
491  * Description:
492  *      Remove and destroy one dev_info entry for @vendor, @model
493  *      in list specified by @key.
494  *
495  * Returns: 0 OK, -error on failure.
496  **/
497 int scsi_dev_info_list_del_keyed(char *vendor, char *model,
498                                  enum scsi_devinfo_key key)
499 {
500         struct scsi_dev_info_list *found;
501
502         found = scsi_dev_info_list_find(vendor, model, key);
503         if (IS_ERR(found))
504                 return PTR_ERR(found);
505
506         list_del(&found->dev_info_list);
507         kfree(found);
508         return 0;
509 }
510 EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
511
512 /**
513  * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
514  * @dev_list:   string of device flags to add
515  *
516  * Description:
517  *      Parse dev_list, and add entries to the scsi_dev_info_list.
518  *      dev_list is of the form "vendor:product:flag,vendor:product:flag".
519  *      dev_list is modified via strsep. Can be called for command line
520  *      addition, for proc or mabye a sysfs interface.
521  *
522  * Returns: 0 if OK, -error on failure.
523  **/
524 static int scsi_dev_info_list_add_str(char *dev_list)
525 {
526         char *vendor, *model, *strflags, *next;
527         char *next_check;
528         int res = 0;
529
530         next = dev_list;
531         if (next && next[0] == '"') {
532                 /*
533                  * Ignore both the leading and trailing quote.
534                  */
535                 next++;
536                 next_check = ",\"";
537         } else {
538                 next_check = ",";
539         }
540
541         /*
542          * For the leading and trailing '"' case, the for loop comes
543          * through the last time with vendor[0] == '\0'.
544          */
545         for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
546              && (res == 0); vendor = strsep(&next, ":")) {
547                 strflags = NULL;
548                 model = strsep(&next, ":");
549                 if (model)
550                         strflags = strsep(&next, next_check);
551                 if (!model || !strflags) {
552                         printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
553                                " '%s'\n", __func__, vendor, model,
554                                strflags);
555                         res = -EINVAL;
556                 } else
557                         res = scsi_dev_info_list_add(0 /* compatible */, vendor,
558                                                      model, strflags, 0);
559         }
560         return res;
561 }
562
563 /**
564  * get_device_flags - get device specific flags from the dynamic device list.
565  * @sdev:       &scsi_device to get flags for
566  * @vendor:     vendor name
567  * @model:      model name
568  *
569  * Description:
570  *     Search the global scsi_dev_info_list (specified by list zero)
571  *     for an entry matching @vendor and @model, if found, return the
572  *     matching flags value, else return the host or global default
573  *     settings.  Called during scan time.
574  **/
575 blist_flags_t scsi_get_device_flags(struct scsi_device *sdev,
576                                     const unsigned char *vendor,
577                                     const unsigned char *model)
578 {
579         return scsi_get_device_flags_keyed(sdev, vendor, model,
580                                            SCSI_DEVINFO_GLOBAL);
581 }
582
583
584 /**
585  * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
586  * @sdev:       &scsi_device to get flags for
587  * @vendor:     vendor name
588  * @model:      model name
589  * @key:        list to look up
590  *
591  * Description:
592  *     Search the scsi_dev_info_list specified by @key for an entry
593  *     matching @vendor and @model, if found, return the matching
594  *     flags value, else return the host or global default settings.
595  *     Called during scan time.
596  **/
597 blist_flags_t scsi_get_device_flags_keyed(struct scsi_device *sdev,
598                                 const unsigned char *vendor,
599                                 const unsigned char *model,
600                                 enum scsi_devinfo_key key)
601 {
602         struct scsi_dev_info_list *devinfo;
603
604         devinfo = scsi_dev_info_list_find(vendor, model, key);
605         if (!IS_ERR(devinfo))
606                 return devinfo->flags;
607
608         /* key or device not found: return nothing */
609         if (key != SCSI_DEVINFO_GLOBAL)
610                 return 0;
611
612         /* except for the global list, where we have an exception */
613         if (sdev->sdev_bflags)
614                 return sdev->sdev_bflags;
615
616         return scsi_default_dev_flags;
617 }
618 EXPORT_SYMBOL(scsi_get_device_flags_keyed);
619
620 #ifdef CONFIG_SCSI_PROC_FS
621 struct double_list {
622         struct list_head *top;
623         struct list_head *bottom;
624 };
625
626 static int devinfo_seq_show(struct seq_file *m, void *v)
627 {
628         struct double_list *dl = v;
629         struct scsi_dev_info_list_table *devinfo_table =
630                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
631         struct scsi_dev_info_list *devinfo =
632                 list_entry(dl->bottom, struct scsi_dev_info_list,
633                            dev_info_list);
634
635         if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
636             devinfo_table->name)
637                 seq_printf(m, "[%s]:\n", devinfo_table->name);
638
639         seq_printf(m, "'%.8s' '%.16s' 0x%llx\n",
640                    devinfo->vendor, devinfo->model, devinfo->flags);
641         return 0;
642 }
643
644 static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
645 {
646         struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
647         loff_t pos = *ppos;
648
649         if (!dl)
650                 return NULL;
651
652         list_for_each(dl->top, &scsi_dev_info_list) {
653                 struct scsi_dev_info_list_table *devinfo_table =
654                         list_entry(dl->top, struct scsi_dev_info_list_table,
655                                    node);
656                 list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
657                         if (pos-- == 0)
658                                 return dl;
659         }
660
661         kfree(dl);
662         return NULL;
663 }
664
665 static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
666 {
667         struct double_list *dl = v;
668         struct scsi_dev_info_list_table *devinfo_table =
669                 list_entry(dl->top, struct scsi_dev_info_list_table, node);
670
671         ++*ppos;
672         dl->bottom = dl->bottom->next;
673         while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
674                 dl->top = dl->top->next;
675                 if (dl->top == &scsi_dev_info_list) {
676                         kfree(dl);
677                         return NULL;
678                 }
679                 devinfo_table = list_entry(dl->top,
680                                            struct scsi_dev_info_list_table,
681                                            node);
682                 dl->bottom = devinfo_table->scsi_dev_info_list.next;
683         }
684
685         return dl;
686 }
687
688 static void devinfo_seq_stop(struct seq_file *m, void *v)
689 {
690         kfree(v);
691 }
692
693 static const struct seq_operations scsi_devinfo_seq_ops = {
694         .start  = devinfo_seq_start,
695         .next   = devinfo_seq_next,
696         .stop   = devinfo_seq_stop,
697         .show   = devinfo_seq_show,
698 };
699
700 static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
701 {
702         return seq_open(file, &scsi_devinfo_seq_ops);
703 }
704
705 /*
706  * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
707  *
708  * Description: Adds a black/white list entry for vendor and model with an
709  * integer value of flag to the scsi device info list.
710  * To use, echo "vendor:model:flag" > /proc/scsi/device_info
711  */
712 static ssize_t proc_scsi_devinfo_write(struct file *file,
713                                        const char __user *buf,
714                                        size_t length, loff_t *ppos)
715 {
716         char *buffer;
717         ssize_t err = length;
718
719         if (!buf || length>PAGE_SIZE)
720                 return -EINVAL;
721         if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
722                 return -ENOMEM;
723         if (copy_from_user(buffer, buf, length)) {
724                 err =-EFAULT;
725                 goto out;
726         }
727
728         if (length < PAGE_SIZE)
729                 buffer[length] = '\0';
730         else if (buffer[PAGE_SIZE-1]) {
731                 err = -EINVAL;
732                 goto out;
733         }
734
735         scsi_dev_info_list_add_str(buffer);
736
737 out:
738         free_page((unsigned long)buffer);
739         return err;
740 }
741
742 static const struct proc_ops scsi_devinfo_proc_ops = {
743         .proc_open      = proc_scsi_devinfo_open,
744         .proc_read      = seq_read,
745         .proc_write     = proc_scsi_devinfo_write,
746         .proc_lseek     = seq_lseek,
747         .proc_release   = seq_release,
748 };
749 #endif /* CONFIG_SCSI_PROC_FS */
750
751 module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
752 MODULE_PARM_DESC(dev_flags,
753          "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
754          " list entries for vendor and model with an integer value of flags"
755          " to the scsi device info list");
756
757 module_param_named(default_dev_flags, scsi_default_dev_flags, ullong, 0644);
758 MODULE_PARM_DESC(default_dev_flags,
759                  "scsi default device flag uint64_t value");
760
761 /**
762  * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
763  **/
764 void scsi_exit_devinfo(void)
765 {
766 #ifdef CONFIG_SCSI_PROC_FS
767         remove_proc_entry("scsi/device_info", NULL);
768 #endif
769
770         scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
771 }
772
773 /**
774  * scsi_dev_info_add_list - add a new devinfo list
775  * @key:        key of the list to add
776  * @name:       Name of the list to add (for /proc/scsi/device_info)
777  *
778  * Adds the requested list, returns zero on success, -EEXIST if the
779  * key is already registered to a list, or other error on failure.
780  */
781 int scsi_dev_info_add_list(enum scsi_devinfo_key key, const char *name)
782 {
783         struct scsi_dev_info_list_table *devinfo_table =
784                 scsi_devinfo_lookup_by_key(key);
785
786         if (!IS_ERR(devinfo_table))
787                 /* list already exists */
788                 return -EEXIST;
789
790         devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
791
792         if (!devinfo_table)
793                 return -ENOMEM;
794
795         INIT_LIST_HEAD(&devinfo_table->node);
796         INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
797         devinfo_table->name = name;
798         devinfo_table->key = key;
799         list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
800
801         return 0;
802 }
803 EXPORT_SYMBOL(scsi_dev_info_add_list);
804
805 /**
806  * scsi_dev_info_remove_list - destroy an added devinfo list
807  * @key: key of the list to destroy
808  *
809  * Iterates over the entire list first, freeing all the values, then
810  * frees the list itself.  Returns 0 on success or -EINVAL if the key
811  * can't be found.
812  */
813 int scsi_dev_info_remove_list(enum scsi_devinfo_key key)
814 {
815         struct list_head *lh, *lh_next;
816         struct scsi_dev_info_list_table *devinfo_table =
817                 scsi_devinfo_lookup_by_key(key);
818
819         if (IS_ERR(devinfo_table))
820                 /* no such list */
821                 return -EINVAL;
822
823         /* remove from the master list */
824         list_del(&devinfo_table->node);
825
826         list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
827                 struct scsi_dev_info_list *devinfo;
828
829                 devinfo = list_entry(lh, struct scsi_dev_info_list,
830                                      dev_info_list);
831                 kfree(devinfo);
832         }
833         kfree(devinfo_table);
834
835         return 0;
836 }
837 EXPORT_SYMBOL(scsi_dev_info_remove_list);
838
839 /**
840  * scsi_init_devinfo - set up the dynamic device list.
841  *
842  * Description:
843  *      Add command line entries from scsi_dev_flags, then add
844  *      scsi_static_device_list entries to the scsi device info list.
845  */
846 int __init scsi_init_devinfo(void)
847 {
848 #ifdef CONFIG_SCSI_PROC_FS
849         struct proc_dir_entry *p;
850 #endif
851         int error, i;
852
853         error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
854         if (error)
855                 return error;
856
857         error = scsi_dev_info_list_add_str(scsi_dev_flags);
858         if (error)
859                 goto out;
860
861         for (i = 0; scsi_static_device_list[i].vendor; i++) {
862                 error = scsi_dev_info_list_add(1 /* compatibile */,
863                                 scsi_static_device_list[i].vendor,
864                                 scsi_static_device_list[i].model,
865                                 NULL,
866                                 scsi_static_device_list[i].flags);
867                 if (error)
868                         goto out;
869         }
870
871 #ifdef CONFIG_SCSI_PROC_FS
872         p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_ops);
873         if (!p) {
874                 error = -ENOMEM;
875                 goto out;
876         }
877 #endif /* CONFIG_SCSI_PROC_FS */
878
879  out:
880         if (error)
881                 scsi_exit_devinfo();
882         return error;
883 }