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 */
 20struct 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
 28struct 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
 36static const char spaces[] = "                "; /* 16 of them */
 37static unsigned scsi_default_dev_flags;
 38static LIST_HEAD(scsi_dev_info_list);
 39static 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 */
 50static 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", "ZIP", NULL, BLIST_NOTQ | BLIST_NOLUN},
201	{"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
202	{"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
203	{"INSITE", "I325VM", NULL, BLIST_KEY},
204	{"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
205	{"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
206	{"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
207	{"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
208	{"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
209	{"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
210	{"MegaRAID", "LD", NULL, BLIST_FORCELUN},
211	{"MICROP", "4110", NULL, BLIST_NOTQ},
212	{"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
213	{"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
214	{"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
215	{"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
216	{"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
217	{"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
218	{"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
219	{"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
220	{"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
221	{"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
222	{"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
223	{"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
224	{"Promise", "", NULL, BLIST_SPARSELUN},
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	{"SGI", "RAID3", "*", BLIST_SPARSELUN},
231	{"SGI", "RAID5", "*", BLIST_SPARSELUN},
232	{"SGI", "TP9100", "*", BLIST_REPORTLUN2},
233	{"SGI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
234	{"IBM", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
235	{"SUN", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
236	{"DELL", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
237	{"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
238	{"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
239	{"SONY", "TSL", NULL, BLIST_FORCELUN},		/* DDS3 & DDS4 autoloaders */
240	{"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
241	{"SUN", "T300", "*", BLIST_SPARSELUN},
242	{"SUN", "T4", "*", BLIST_SPARSELUN},
243	{"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
244	{"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
245	{"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
246	{"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
247	{"Traxdata", "CDR4120", NULL, BLIST_NOLUN},	/* locks up */
248	{"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
249	{"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
250	{"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
251	{"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
252	{"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
253	{"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
254	{"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
255	{"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
256	{ NULL, NULL, NULL, 0 },
257};
258
259static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
260{
261	struct scsi_dev_info_list_table *devinfo_table;
262	int found = 0;
263
264	list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
265		if (devinfo_table->key == key) {
266			found = 1;
267			break;
268		}
269	if (!found)
270		return ERR_PTR(-EINVAL);
271
272	return devinfo_table;
273}
274
275/*
276 * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
277 * devinfo vendor and model strings.
278 */
279static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
280				char *from, int compatible)
281{
282	size_t from_length;
283
284	from_length = strlen(from);
285	strncpy(to, from, min(to_length, from_length));
286	if (from_length < to_length) {
287		if (compatible) {
288			/*
289			 * NUL terminate the string if it is short.
290			 */
291			to[from_length] = '\0';
292		} else {
293			/* 
294			 * space pad the string if it is short. 
295			 */
296			strncpy(&to[from_length], spaces,
297				to_length - from_length);
298		}
299	}
300	if (from_length > to_length)
301		 printk(KERN_WARNING "%s: %s string '%s' is too long\n",
302			__func__, name, from);
303}
304
305/**
306 * scsi_dev_info_list_add - add one dev_info list entry.
307 * @compatible: if true, null terminate short strings.  Otherwise space pad.
308 * @vendor:	vendor string
309 * @model:	model (product) string
310 * @strflags:	integer string
311 * @flags:	if strflags NULL, use this flag value
312 *
313 * Description:
314 * 	Create and add one dev_info entry for @vendor, @model, @strflags or
315 * 	@flag. If @compatible, add to the tail of the list, do not space
316 * 	pad, and set devinfo->compatible. The scsi_static_device_list entries
317 * 	are added with @compatible 1 and @clfags NULL.
318 *
319 * Returns: 0 OK, -error on failure.
320 **/
321static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
322			    char *strflags, int flags)
323{
324	return scsi_dev_info_list_add_keyed(compatible, vendor, model,
325					    strflags, flags,
326					    SCSI_DEVINFO_GLOBAL);
327}
328
329/**
330 * scsi_dev_info_list_add_keyed - add one dev_info list entry.
331 * @compatible: if true, null terminate short strings.  Otherwise space pad.
332 * @vendor:	vendor string
333 * @model:	model (product) string
334 * @strflags:	integer string
335 * @flags:	if strflags NULL, use this flag value
336 * @key:	specify list to use
337 *
338 * Description:
339 * 	Create and add one dev_info entry for @vendor, @model,
340 * 	@strflags or @flag in list specified by @key. If @compatible,
341 * 	add to the tail of the list, do not space pad, and set
342 * 	devinfo->compatible. The scsi_static_device_list entries are
343 * 	added with @compatible 1 and @clfags NULL.
344 *
345 * Returns: 0 OK, -error on failure.
346 **/
347int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
348				 char *strflags, int flags, int key)
349{
350	struct scsi_dev_info_list *devinfo;
351	struct scsi_dev_info_list_table *devinfo_table =
352		scsi_devinfo_lookup_by_key(key);
353
354	if (IS_ERR(devinfo_table))
355		return PTR_ERR(devinfo_table);
356
357	devinfo = kmalloc(sizeof(*devinfo), GFP_KERNEL);
358	if (!devinfo) {
359		printk(KERN_ERR "%s: no memory\n", __func__);
360		return -ENOMEM;
361	}
362
363	scsi_strcpy_devinfo("vendor", devinfo->vendor, sizeof(devinfo->vendor),
364			    vendor, compatible);
365	scsi_strcpy_devinfo("model", devinfo->model, sizeof(devinfo->model),
366			    model, compatible);
367
368	if (strflags)
369		devinfo->flags = simple_strtoul(strflags, NULL, 0);
370	else
371		devinfo->flags = flags;
372
373	devinfo->compatible = compatible;
374
375	if (compatible)
376		list_add_tail(&devinfo->dev_info_list,
377			      &devinfo_table->scsi_dev_info_list);
378	else
379		list_add(&devinfo->dev_info_list,
380			 &devinfo_table->scsi_dev_info_list);
381
382	return 0;
383}
384EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
385
386/**
387 * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
388 * @vendor:	vendor string
389 * @model:	model (product) string
390 * @key:	specify list to use
391 *
392 * Description:
393 * 	Remove and destroy one dev_info entry for @vendor, @model
394 * 	in list specified by @key.
395 *
396 * Returns: 0 OK, -error on failure.
397 **/
398int scsi_dev_info_list_del_keyed(char *vendor, char *model, int key)
399{
400	struct scsi_dev_info_list *devinfo, *found = NULL;
401	struct scsi_dev_info_list_table *devinfo_table =
402		scsi_devinfo_lookup_by_key(key);
403
404	if (IS_ERR(devinfo_table))
405		return PTR_ERR(devinfo_table);
406
407	list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
408			    dev_info_list) {
409		if (devinfo->compatible) {
410			/*
411			 * Behave like the older version of get_device_flags.
412			 */
413			size_t max;
414			/*
415			 * XXX why skip leading spaces? If an odd INQUIRY
416			 * value, that should have been part of the
417			 * scsi_static_device_list[] entry, such as "  FOO"
418			 * rather than "FOO". Since this code is already
419			 * here, and we don't know what device it is
420			 * trying to work with, leave it as-is.
421			 */
422			max = 8;	/* max length of vendor */
423			while ((max > 0) && *vendor == ' ') {
424				max--;
425				vendor++;
426			}
427			/*
428			 * XXX removing the following strlen() would be
429			 * good, using it means that for a an entry not in
430			 * the list, we scan every byte of every vendor
431			 * listed in scsi_static_device_list[], and never match
432			 * a single one (and still have to compare at
433			 * least the first byte of each vendor).
434			 */
435			if (memcmp(devinfo->vendor, vendor,
436				    min(max, strlen(devinfo->vendor))))
437				continue;
438			/*
439			 * Skip spaces again.
440			 */
441			max = 16;	/* max length of model */
442			while ((max > 0) && *model == ' ') {
443				max--;
444				model++;
445			}
446			if (memcmp(devinfo->model, model,
447				   min(max, strlen(devinfo->model))))
448				continue;
449			found = devinfo;
450		} else {
451			if (!memcmp(devinfo->vendor, vendor,
452				     sizeof(devinfo->vendor)) &&
453			     !memcmp(devinfo->model, model,
454				      sizeof(devinfo->model)))
455				found = devinfo;
456		}
457		if (found)
458			break;
459	}
460
461	if (found) {
462		list_del(&found->dev_info_list);
463		kfree(found);
464		return 0;
465	}
466
467	return -ENOENT;
468}
469EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
470
471/**
472 * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
473 * @dev_list:	string of device flags to add
474 *
475 * Description:
476 * 	Parse dev_list, and add entries to the scsi_dev_info_list.
477 * 	dev_list is of the form "vendor:product:flag,vendor:product:flag".
478 * 	dev_list is modified via strsep. Can be called for command line
479 * 	addition, for proc or mabye a sysfs interface.
480 *
481 * Returns: 0 if OK, -error on failure.
482 **/
483static int scsi_dev_info_list_add_str(char *dev_list)
484{
485	char *vendor, *model, *strflags, *next;
486	char *next_check;
487	int res = 0;
488
489	next = dev_list;
490	if (next && next[0] == '"') {
491		/*
492		 * Ignore both the leading and trailing quote.
493		 */
494		next++;
495		next_check = ",\"";
496	} else {
497		next_check = ",";
498	}
499
500	/*
501	 * For the leading and trailing '"' case, the for loop comes
502	 * through the last time with vendor[0] == '\0'.
503	 */
504	for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
505	     && (res == 0); vendor = strsep(&next, ":")) {
506		strflags = NULL;
507		model = strsep(&next, ":");
508		if (model)
509			strflags = strsep(&next, next_check);
510		if (!model || !strflags) {
511			printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
512			       " '%s'\n", __func__, vendor, model,
513			       strflags);
514			res = -EINVAL;
515		} else
516			res = scsi_dev_info_list_add(0 /* compatible */, vendor,
517						     model, strflags, 0);
518	}
519	return res;
520}
521
522/**
523 * get_device_flags - get device specific flags from the dynamic device list.
524 * @sdev:       &scsi_device to get flags for
525 * @vendor:	vendor name
526 * @model:	model name
527 *
528 * Description:
529 *     Search the global scsi_dev_info_list (specified by list zero)
530 *     for an entry matching @vendor and @model, if found, return the
531 *     matching flags value, else return the host or global default
532 *     settings.  Called during scan time.
533 **/
534int scsi_get_device_flags(struct scsi_device *sdev,
535			  const unsigned char *vendor,
536			  const unsigned char *model)
537{
538	return scsi_get_device_flags_keyed(sdev, vendor, model,
539					   SCSI_DEVINFO_GLOBAL);
540}
541
542
543/**
544 * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
545 * @sdev:       &scsi_device to get flags for
546 * @vendor:	vendor name
547 * @model:	model name
548 * @key:	list to look up
549 *
550 * Description:
551 *     Search the scsi_dev_info_list specified by @key for an entry
552 *     matching @vendor and @model, if found, return the matching
553 *     flags value, else return the host or global default settings.
554 *     Called during scan time.
555 **/
556int scsi_get_device_flags_keyed(struct scsi_device *sdev,
557				const unsigned char *vendor,
558				const unsigned char *model,
559				int key)
560{
561	struct scsi_dev_info_list *devinfo;
562	struct scsi_dev_info_list_table *devinfo_table;
563
564	devinfo_table = scsi_devinfo_lookup_by_key(key);
565
566	if (IS_ERR(devinfo_table))
567		return PTR_ERR(devinfo_table);
568
569	list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
570			    dev_info_list) {
571		if (devinfo->compatible) {
572			/*
573			 * Behave like the older version of get_device_flags.
574			 */
575			size_t max;
576			/*
577			 * XXX why skip leading spaces? If an odd INQUIRY
578			 * value, that should have been part of the
579			 * scsi_static_device_list[] entry, such as "  FOO"
580			 * rather than "FOO". Since this code is already
581			 * here, and we don't know what device it is
582			 * trying to work with, leave it as-is.
583			 */
584			max = 8;	/* max length of vendor */
585			while ((max > 0) && *vendor == ' ') {
586				max--;
587				vendor++;
588			}
589			/*
590			 * XXX removing the following strlen() would be
591			 * good, using it means that for a an entry not in
592			 * the list, we scan every byte of every vendor
593			 * listed in scsi_static_device_list[], and never match
594			 * a single one (and still have to compare at
595			 * least the first byte of each vendor).
596			 */
597			if (memcmp(devinfo->vendor, vendor,
598				    min(max, strlen(devinfo->vendor))))
599				continue;
600			/*
601			 * Skip spaces again.
602			 */
603			max = 16;	/* max length of model */
604			while ((max > 0) && *model == ' ') {
605				max--;
606				model++;
607			}
608			if (memcmp(devinfo->model, model,
609				   min(max, strlen(devinfo->model))))
610				continue;
611			return devinfo->flags;
612		} else {
613			if (!memcmp(devinfo->vendor, vendor,
614				     sizeof(devinfo->vendor)) &&
615			     !memcmp(devinfo->model, model,
616				      sizeof(devinfo->model)))
617				return devinfo->flags;
618		}
619	}
620	/* nothing found, return nothing */
621	if (key != SCSI_DEVINFO_GLOBAL)
622		return 0;
623
624	/* except for the global list, where we have an exception */
625	if (sdev->sdev_bflags)
626		return sdev->sdev_bflags;
627
628	return scsi_default_dev_flags;
629}
630EXPORT_SYMBOL(scsi_get_device_flags_keyed);
631
632#ifdef CONFIG_SCSI_PROC_FS
633struct double_list {
634	struct list_head *top;
635	struct list_head *bottom;
636};
637
638static int devinfo_seq_show(struct seq_file *m, void *v)
639{
640	struct double_list *dl = v;
641	struct scsi_dev_info_list_table *devinfo_table =
642		list_entry(dl->top, struct scsi_dev_info_list_table, node);
643	struct scsi_dev_info_list *devinfo =
644		list_entry(dl->bottom, struct scsi_dev_info_list,
645			   dev_info_list);
646
647	if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
648	    devinfo_table->name)
649		seq_printf(m, "[%s]:\n", devinfo_table->name);
650
651	seq_printf(m, "'%.8s' '%.16s' 0x%x\n",
652		   devinfo->vendor, devinfo->model, devinfo->flags);
653	return 0;
654}
655
656static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
657{
658	struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
659	loff_t pos = *ppos;
660
661	if (!dl)
662		return NULL;
663
664	list_for_each(dl->top, &scsi_dev_info_list) {
665		struct scsi_dev_info_list_table *devinfo_table =
666			list_entry(dl->top, struct scsi_dev_info_list_table,
667				   node);
668		list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
669			if (pos-- == 0)
670				return dl;
671	}
672
673	kfree(dl);
674	return NULL;
675}
676
677static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
678{
679	struct double_list *dl = v;
680	struct scsi_dev_info_list_table *devinfo_table =
681		list_entry(dl->top, struct scsi_dev_info_list_table, node);
682
683	++*ppos;
684	dl->bottom = dl->bottom->next;
685	while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
686		dl->top = dl->top->next;
687		if (dl->top == &scsi_dev_info_list) {
688			kfree(dl);
689			return NULL;
690		}
691		devinfo_table = list_entry(dl->top,
692					   struct scsi_dev_info_list_table,
693					   node);
694		dl->bottom = devinfo_table->scsi_dev_info_list.next;
695	}
696
697	return dl;
698}
699
700static void devinfo_seq_stop(struct seq_file *m, void *v)
701{
702	kfree(v);
703}
704
705static const struct seq_operations scsi_devinfo_seq_ops = {
706	.start	= devinfo_seq_start,
707	.next	= devinfo_seq_next,
708	.stop	= devinfo_seq_stop,
709	.show	= devinfo_seq_show,
710};
711
712static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
713{
714	return seq_open(file, &scsi_devinfo_seq_ops);
715}
716
717/* 
718 * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
719 *
720 * Description: Adds a black/white list entry for vendor and model with an
721 * integer value of flag to the scsi device info list.
722 * To use, echo "vendor:model:flag" > /proc/scsi/device_info
723 */
724static ssize_t proc_scsi_devinfo_write(struct file *file,
725				       const char __user *buf,
726				       size_t length, loff_t *ppos)
727{
728	char *buffer;
729	ssize_t err = length;
730
731	if (!buf || length>PAGE_SIZE)
732		return -EINVAL;
733	if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
734		return -ENOMEM;
735	if (copy_from_user(buffer, buf, length)) {
736		err =-EFAULT;
737		goto out;
738	}
739
740	if (length < PAGE_SIZE)
741		buffer[length] = '\0';
742	else if (buffer[PAGE_SIZE-1]) {
743		err = -EINVAL;
744		goto out;
745	}
746
747	scsi_dev_info_list_add_str(buffer);
748
749out:
750	free_page((unsigned long)buffer);
751	return err;
752}
753
754static const struct file_operations scsi_devinfo_proc_fops = {
755	.owner		= THIS_MODULE,
756	.open		= proc_scsi_devinfo_open,
757	.read		= seq_read,
758	.write		= proc_scsi_devinfo_write,
759	.llseek		= seq_lseek,
760	.release	= seq_release,
761};
762#endif /* CONFIG_SCSI_PROC_FS */
763
764module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
765MODULE_PARM_DESC(dev_flags,
766	 "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
767	 " list entries for vendor and model with an integer value of flags"
768	 " to the scsi device info list");
769
770module_param_named(default_dev_flags, scsi_default_dev_flags, int, S_IRUGO|S_IWUSR);
771MODULE_PARM_DESC(default_dev_flags,
772		 "scsi default device flag integer value");
773
774/**
775 * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
776 **/
777void scsi_exit_devinfo(void)
778{
779#ifdef CONFIG_SCSI_PROC_FS
780	remove_proc_entry("scsi/device_info", NULL);
781#endif
782
783	scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
784}
785
786/**
787 * scsi_dev_info_add_list - add a new devinfo list
788 * @key:	key of the list to add
789 * @name:	Name of the list to add (for /proc/scsi/device_info)
790 *
791 * Adds the requested list, returns zero on success, -EEXIST if the
792 * key is already registered to a list, or other error on failure.
793 */
794int scsi_dev_info_add_list(int key, const char *name)
795{
796	struct scsi_dev_info_list_table *devinfo_table =
797		scsi_devinfo_lookup_by_key(key);
798
799	if (!IS_ERR(devinfo_table))
800		/* list already exists */
801		return -EEXIST;
802
803	devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
804
805	if (!devinfo_table)
806		return -ENOMEM;
807
808	INIT_LIST_HEAD(&devinfo_table->node);
809	INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
810	devinfo_table->name = name;
811	devinfo_table->key = key;
812	list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
813
814	return 0;
815}
816EXPORT_SYMBOL(scsi_dev_info_add_list);
817
818/**
819 * scsi_dev_info_remove_list - destroy an added devinfo list
820 * @key: key of the list to destroy
821 *
822 * Iterates over the entire list first, freeing all the values, then
823 * frees the list itself.  Returns 0 on success or -EINVAL if the key
824 * can't be found.
825 */
826int scsi_dev_info_remove_list(int key)
827{
828	struct list_head *lh, *lh_next;
829	struct scsi_dev_info_list_table *devinfo_table =
830		scsi_devinfo_lookup_by_key(key);
831
832	if (IS_ERR(devinfo_table))
833		/* no such list */
834		return -EINVAL;
835
836	/* remove from the master list */
837	list_del(&devinfo_table->node);
838
839	list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
840		struct scsi_dev_info_list *devinfo;
841
842		devinfo = list_entry(lh, struct scsi_dev_info_list,
843				     dev_info_list);
844		kfree(devinfo);
845	}
846	kfree(devinfo_table);
847
848	return 0;
849}
850EXPORT_SYMBOL(scsi_dev_info_remove_list);
851
852/**
853 * scsi_init_devinfo - set up the dynamic device list.
854 *
855 * Description:
856 * 	Add command line entries from scsi_dev_flags, then add
857 * 	scsi_static_device_list entries to the scsi device info list.
858 */
859int __init scsi_init_devinfo(void)
860{
861#ifdef CONFIG_SCSI_PROC_FS
862	struct proc_dir_entry *p;
863#endif
864	int error, i;
865
866	error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
867	if (error)
868		return error;
869
870	error = scsi_dev_info_list_add_str(scsi_dev_flags);
871	if (error)
872		goto out;
873
874	for (i = 0; scsi_static_device_list[i].vendor; i++) {
875		error = scsi_dev_info_list_add(1 /* compatibile */,
876				scsi_static_device_list[i].vendor,
877				scsi_static_device_list[i].model,
878				NULL,
879				scsi_static_device_list[i].flags);
880		if (error)
881			goto out;
882	}
883
884#ifdef CONFIG_SCSI_PROC_FS
885	p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_fops);
886	if (!p) {
887		error = -ENOMEM;
888		goto out;
889	}
890#endif /* CONFIG_SCSI_PROC_FS */
891
892 out:
893	if (error)
894		scsi_exit_devinfo();
895	return error;
896}