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/drivers/scsi/scsi_devinfo.c

http://github.com/mirrors/linux
C | 880 lines | 598 code | 86 blank | 196 comment | 76 complexity | cf5947b0a80889c0c9bbee7af7ef3e4f MD5 | raw file
  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 */
 21struct 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
 29struct 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
 37static blist_flags_t 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	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	{"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN},
188	{"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
189	{"IBM", "2105", NULL, BLIST_RETRY_HWERROR},
190	{"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
191	{"IOMEGA", "ZIP", NULL, BLIST_NOTQ | BLIST_NOLUN},
192	{"IOMEGA", "Io20S         *F", NULL, BLIST_KEY},
193	{"INSITE", "Floptical   F*8I", NULL, BLIST_KEY},
194	{"INSITE", "I325VM", NULL, BLIST_KEY},
195	{"Intel", "Multi-Flex", NULL, BLIST_NO_RSOC},
196	{"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
197	{"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
198	{"Marvell", "Console", NULL, BLIST_SKIP_VPD_PAGES},
199	{"Marvell", "91xx Config", "1.01", BLIST_SKIP_VPD_PAGES},
200	{"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
201	{"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
202	{"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
203	{"Medion", "Flash XL  MMC/SD", "2.6D", BLIST_FORCELUN},
204	{"MegaRAID", "LD", NULL, BLIST_FORCELUN},
205	{"MICROP", "4110", NULL, BLIST_NOTQ},
206	{"MSFT", "Virtual HD", NULL, BLIST_MAX_1024 | BLIST_NO_RSOC},
207	{"MYLEX", "DACARMRB", "*", BLIST_REPORTLUN2},
208	{"nCipher", "Fastness Crypto", NULL, BLIST_FORCELUN},
209	{"NAKAMICH", "MJ-4.8S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
210	{"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
211	{"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
212	{"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
213	{"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
214	{"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
215	{"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
216	{"PIONEER", "CD-ROM DRM-602X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
217	{"PIONEER", "CD-ROM DRM-604X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
218	{"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
219	{"Promise", "VTrak E610f", NULL, BLIST_SPARSELUN | BLIST_NO_RSOC},
220	{"Promise", "", NULL, BLIST_SPARSELUN},
221	{"QEMU", "QEMU CD-ROM", NULL, BLIST_SKIP_VPD_PAGES},
222	{"QNAP", "iSCSI Storage", NULL, BLIST_MAX_1024},
223	{"SYNOLOGY", "iSCSI Storage", NULL, BLIST_MAX_1024},
224	{"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
225	{"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN},
226	{"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN},
227	{"SEAGATE", "ST34555N", "0930", BLIST_NOTQ},	/* Chokes on tagged INQUIRY */
228	{"SEAGATE", "ST3390N", "9546", BLIST_NOTQ},
229	{"SEAGATE", "ST900MM0006", NULL, BLIST_SKIP_VPD_PAGES},
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	{"STK", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
238	{"NETAPP", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
239	{"LSI", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
240	{"ENGENIO", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
241	{"LENOVO", "Universal Xport", "*", BLIST_NO_ULD_ATTACH},
242	{"SanDisk", "Cruzer Blade", NULL, BLIST_TRY_VPD_PAGES |
243		BLIST_INQUIRY_36},
244	{"SMSC", "USB 2 HS-CF", NULL, BLIST_SPARSELUN | BLIST_INQUIRY_36},
245	{"SONY", "CD-ROM CDU-8001", NULL, BLIST_BORKEN},
246	{"SONY", "TSL", NULL, BLIST_FORCELUN},		/* DDS3 & DDS4 autoloaders */
247	{"ST650211", "CF", NULL, BLIST_RETRY_HWERROR},
248	{"SUN", "T300", "*", BLIST_SPARSELUN},
249	{"SUN", "T4", "*", BLIST_SPARSELUN},
250	{"Tornado-", "F4", "*", BLIST_NOREPORTLUN},
251	{"TOSHIBA", "CDROM", NULL, BLIST_ISROM},
252	{"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM},
253	{"Traxdata", "CDR4120", NULL, BLIST_NOLUN},	/* locks up */
254	{"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36},
255	{"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN},
256	{"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN},
257	{"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN},
258	{"WDC WD25", "00JB-00FUA0", NULL, BLIST_NOREPORTLUN},
259	{"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
260	{"Zzyzx", "RocketStor 500S", NULL, BLIST_SPARSELUN},
261	{"Zzyzx", "RocketStor 2000", NULL, BLIST_SPARSELUN},
262	{ NULL, NULL, NULL, 0 },
263};
264
265static struct scsi_dev_info_list_table *scsi_devinfo_lookup_by_key(int key)
266{
267	struct scsi_dev_info_list_table *devinfo_table;
268	int found = 0;
269
270	list_for_each_entry(devinfo_table, &scsi_dev_info_list, node)
271		if (devinfo_table->key == key) {
272			found = 1;
273			break;
274		}
275	if (!found)
276		return ERR_PTR(-EINVAL);
277
278	return devinfo_table;
279}
280
281/*
282 * scsi_strcpy_devinfo: called from scsi_dev_info_list_add to copy into
283 * devinfo vendor and model strings.
284 */
285static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
286				char *from, int compatible)
287{
288	size_t from_length;
289
290	from_length = strlen(from);
291	/* This zero-pads the destination */
292	strncpy(to, from, to_length);
293	if (from_length < to_length && !compatible) {
294		/*
295		 * space pad the string if it is short.
296		 */
297		memset(&to[from_length], ' ', to_length - from_length);
298	}
299	if (from_length > to_length)
300		 printk(KERN_WARNING "%s: %s string '%s' is too long\n",
301			__func__, name, from);
302}
303
304/**
305 * scsi_dev_info_list_add - add one dev_info list entry.
306 * @compatible: if true, null terminate short strings.  Otherwise space pad.
307 * @vendor:	vendor string
308 * @model:	model (product) string
309 * @strflags:	integer string
310 * @flags:	if strflags NULL, use this flag value
311 *
312 * Description:
313 *	Create and add one dev_info entry for @vendor, @model, @strflags or
314 *	@flag. If @compatible, add to the tail of the list, do not space
315 *	pad, and set devinfo->compatible. The scsi_static_device_list entries
316 *	are added with @compatible 1 and @clfags NULL.
317 *
318 * Returns: 0 OK, -error on failure.
319 **/
320static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
321			    char *strflags, blist_flags_t flags)
322{
323	return scsi_dev_info_list_add_keyed(compatible, vendor, model,
324					    strflags, flags,
325					    SCSI_DEVINFO_GLOBAL);
326}
327
328/**
329 * scsi_dev_info_list_add_keyed - add one dev_info list entry.
330 * @compatible: if true, null terminate short strings.  Otherwise space pad.
331 * @vendor:	vendor string
332 * @model:	model (product) string
333 * @strflags:	integer string
334 * @flags:	if strflags NULL, use this flag value
335 * @key:	specify list to use
336 *
337 * Description:
338 *	Create and add one dev_info entry for @vendor, @model,
339 *	@strflags or @flag in list specified by @key. If @compatible,
340 *	add to the tail of the list, do not space pad, and set
341 *	devinfo->compatible. The scsi_static_device_list entries are
342 *	added with @compatible 1 and @clfags NULL.
343 *
344 * Returns: 0 OK, -error on failure.
345 **/
346int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
347				 char *strflags, blist_flags_t flags,
348				 enum scsi_devinfo_key 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		unsigned long long val;
370		int ret = kstrtoull(strflags, 0, &val);
371
372		if (ret != 0) {
373			kfree(devinfo);
374			return ret;
375		}
376		flags = (__force blist_flags_t)val;
377	}
378	if (flags & __BLIST_UNUSED_MASK) {
379		pr_err("scsi_devinfo (%s:%s): unsupported flags 0x%llx",
380		       vendor, model, flags & __BLIST_UNUSED_MASK);
381		kfree(devinfo);
382		return -EINVAL;
383	}
384	devinfo->flags = flags;
385	devinfo->compatible = compatible;
386
387	if (compatible)
388		list_add_tail(&devinfo->dev_info_list,
389			      &devinfo_table->scsi_dev_info_list);
390	else
391		list_add(&devinfo->dev_info_list,
392			 &devinfo_table->scsi_dev_info_list);
393
394	return 0;
395}
396EXPORT_SYMBOL(scsi_dev_info_list_add_keyed);
397
398/**
399 * scsi_dev_info_list_find - find a matching dev_info list entry.
400 * @vendor:	full vendor string
401 * @model:	full model (product) string
402 * @key:	specify list to use
403 *
404 * Description:
405 *	Finds the first dev_info entry matching @vendor, @model
406 *	in list specified by @key.
407 *
408 * Returns: pointer to matching entry, or ERR_PTR on failure.
409 **/
410static struct scsi_dev_info_list *scsi_dev_info_list_find(const char *vendor,
411		const char *model, enum scsi_devinfo_key key)
412{
413	struct scsi_dev_info_list *devinfo;
414	struct scsi_dev_info_list_table *devinfo_table =
415		scsi_devinfo_lookup_by_key(key);
416	size_t vmax, mmax, mlen;
417	const char *vskip, *mskip;
418
419	if (IS_ERR(devinfo_table))
420		return (struct scsi_dev_info_list *) devinfo_table;
421
422	/* Prepare for "compatible" matches */
423
424	/*
425	 * XXX why skip leading spaces? If an odd INQUIRY
426	 * value, that should have been part of the
427	 * scsi_static_device_list[] entry, such as "  FOO"
428	 * rather than "FOO". Since this code is already
429	 * here, and we don't know what device it is
430	 * trying to work with, leave it as-is.
431	 */
432	vmax = sizeof(devinfo->vendor);
433	vskip = vendor;
434	while (vmax > 0 && *vskip == ' ') {
435		vmax--;
436		vskip++;
437	}
438	/* Also skip trailing spaces */
439	while (vmax > 0 && vskip[vmax - 1] == ' ')
440		--vmax;
441
442	mmax = sizeof(devinfo->model);
443	mskip = model;
444	while (mmax > 0 && *mskip == ' ') {
445		mmax--;
446		mskip++;
447	}
448	while (mmax > 0 && mskip[mmax - 1] == ' ')
449		--mmax;
450
451	list_for_each_entry(devinfo, &devinfo_table->scsi_dev_info_list,
452			    dev_info_list) {
453		if (devinfo->compatible) {
454			/*
455			 * vendor strings must be an exact match
456			 */
457			if (vmax != strnlen(devinfo->vendor,
458					    sizeof(devinfo->vendor)) ||
459			    memcmp(devinfo->vendor, vskip, vmax))
460				continue;
461
462			/*
463			 * @model specifies the full string, and
464			 * must be larger or equal to devinfo->model
465			 */
466			mlen = strnlen(devinfo->model, sizeof(devinfo->model));
467			if (mmax < mlen || memcmp(devinfo->model, mskip, mlen))
468				continue;
469			return devinfo;
470		} else {
471			if (!memcmp(devinfo->vendor, vendor,
472				    sizeof(devinfo->vendor)) &&
473			    !memcmp(devinfo->model, model,
474				    sizeof(devinfo->model)))
475				return devinfo;
476		}
477	}
478
479	return ERR_PTR(-ENOENT);
480}
481
482/**
483 * scsi_dev_info_list_del_keyed - remove one dev_info list entry.
484 * @vendor:	vendor string
485 * @model:	model (product) string
486 * @key:	specify list to use
487 *
488 * Description:
489 *	Remove and destroy one dev_info entry for @vendor, @model
490 *	in list specified by @key.
491 *
492 * Returns: 0 OK, -error on failure.
493 **/
494int scsi_dev_info_list_del_keyed(char *vendor, char *model,
495				 enum scsi_devinfo_key key)
496{
497	struct scsi_dev_info_list *found;
498
499	found = scsi_dev_info_list_find(vendor, model, key);
500	if (IS_ERR(found))
501		return PTR_ERR(found);
502
503	list_del(&found->dev_info_list);
504	kfree(found);
505	return 0;
506}
507EXPORT_SYMBOL(scsi_dev_info_list_del_keyed);
508
509/**
510 * scsi_dev_info_list_add_str - parse dev_list and add to the scsi_dev_info_list.
511 * @dev_list:	string of device flags to add
512 *
513 * Description:
514 *	Parse dev_list, and add entries to the scsi_dev_info_list.
515 *	dev_list is of the form "vendor:product:flag,vendor:product:flag".
516 *	dev_list is modified via strsep. Can be called for command line
517 *	addition, for proc or mabye a sysfs interface.
518 *
519 * Returns: 0 if OK, -error on failure.
520 **/
521static int scsi_dev_info_list_add_str(char *dev_list)
522{
523	char *vendor, *model, *strflags, *next;
524	char *next_check;
525	int res = 0;
526
527	next = dev_list;
528	if (next && next[0] == '"') {
529		/*
530		 * Ignore both the leading and trailing quote.
531		 */
532		next++;
533		next_check = ",\"";
534	} else {
535		next_check = ",";
536	}
537
538	/*
539	 * For the leading and trailing '"' case, the for loop comes
540	 * through the last time with vendor[0] == '\0'.
541	 */
542	for (vendor = strsep(&next, ":"); vendor && (vendor[0] != '\0')
543	     && (res == 0); vendor = strsep(&next, ":")) {
544		strflags = NULL;
545		model = strsep(&next, ":");
546		if (model)
547			strflags = strsep(&next, next_check);
548		if (!model || !strflags) {
549			printk(KERN_ERR "%s: bad dev info string '%s' '%s'"
550			       " '%s'\n", __func__, vendor, model,
551			       strflags);
552			res = -EINVAL;
553		} else
554			res = scsi_dev_info_list_add(0 /* compatible */, vendor,
555						     model, strflags, 0);
556	}
557	return res;
558}
559
560/**
561 * get_device_flags - get device specific flags from the dynamic device list.
562 * @sdev:       &scsi_device to get flags for
563 * @vendor:	vendor name
564 * @model:	model name
565 *
566 * Description:
567 *     Search the global scsi_dev_info_list (specified by list zero)
568 *     for an entry matching @vendor and @model, if found, return the
569 *     matching flags value, else return the host or global default
570 *     settings.  Called during scan time.
571 **/
572blist_flags_t scsi_get_device_flags(struct scsi_device *sdev,
573				    const unsigned char *vendor,
574				    const unsigned char *model)
575{
576	return scsi_get_device_flags_keyed(sdev, vendor, model,
577					   SCSI_DEVINFO_GLOBAL);
578}
579
580
581/**
582 * scsi_get_device_flags_keyed - get device specific flags from the dynamic device list
583 * @sdev:       &scsi_device to get flags for
584 * @vendor:	vendor name
585 * @model:	model name
586 * @key:	list to look up
587 *
588 * Description:
589 *     Search the scsi_dev_info_list specified by @key for an entry
590 *     matching @vendor and @model, if found, return the matching
591 *     flags value, else return the host or global default settings.
592 *     Called during scan time.
593 **/
594blist_flags_t scsi_get_device_flags_keyed(struct scsi_device *sdev,
595				const unsigned char *vendor,
596				const unsigned char *model,
597				enum scsi_devinfo_key key)
598{
599	struct scsi_dev_info_list *devinfo;
600
601	devinfo = scsi_dev_info_list_find(vendor, model, key);
602	if (!IS_ERR(devinfo))
603		return devinfo->flags;
604
605	/* key or device not found: return nothing */
606	if (key != SCSI_DEVINFO_GLOBAL)
607		return 0;
608
609	/* except for the global list, where we have an exception */
610	if (sdev->sdev_bflags)
611		return sdev->sdev_bflags;
612
613	return scsi_default_dev_flags;
614}
615EXPORT_SYMBOL(scsi_get_device_flags_keyed);
616
617#ifdef CONFIG_SCSI_PROC_FS
618struct double_list {
619	struct list_head *top;
620	struct list_head *bottom;
621};
622
623static int devinfo_seq_show(struct seq_file *m, void *v)
624{
625	struct double_list *dl = v;
626	struct scsi_dev_info_list_table *devinfo_table =
627		list_entry(dl->top, struct scsi_dev_info_list_table, node);
628	struct scsi_dev_info_list *devinfo =
629		list_entry(dl->bottom, struct scsi_dev_info_list,
630			   dev_info_list);
631
632	if (devinfo_table->scsi_dev_info_list.next == dl->bottom &&
633	    devinfo_table->name)
634		seq_printf(m, "[%s]:\n", devinfo_table->name);
635
636	seq_printf(m, "'%.8s' '%.16s' 0x%llx\n",
637		   devinfo->vendor, devinfo->model, devinfo->flags);
638	return 0;
639}
640
641static void *devinfo_seq_start(struct seq_file *m, loff_t *ppos)
642{
643	struct double_list *dl = kmalloc(sizeof(*dl), GFP_KERNEL);
644	loff_t pos = *ppos;
645
646	if (!dl)
647		return NULL;
648
649	list_for_each(dl->top, &scsi_dev_info_list) {
650		struct scsi_dev_info_list_table *devinfo_table =
651			list_entry(dl->top, struct scsi_dev_info_list_table,
652				   node);
653		list_for_each(dl->bottom, &devinfo_table->scsi_dev_info_list)
654			if (pos-- == 0)
655				return dl;
656	}
657
658	kfree(dl);
659	return NULL;
660}
661
662static void *devinfo_seq_next(struct seq_file *m, void *v, loff_t *ppos)
663{
664	struct double_list *dl = v;
665	struct scsi_dev_info_list_table *devinfo_table =
666		list_entry(dl->top, struct scsi_dev_info_list_table, node);
667
668	++*ppos;
669	dl->bottom = dl->bottom->next;
670	while (&devinfo_table->scsi_dev_info_list == dl->bottom) {
671		dl->top = dl->top->next;
672		if (dl->top == &scsi_dev_info_list) {
673			kfree(dl);
674			return NULL;
675		}
676		devinfo_table = list_entry(dl->top,
677					   struct scsi_dev_info_list_table,
678					   node);
679		dl->bottom = devinfo_table->scsi_dev_info_list.next;
680	}
681
682	return dl;
683}
684
685static void devinfo_seq_stop(struct seq_file *m, void *v)
686{
687	kfree(v);
688}
689
690static const struct seq_operations scsi_devinfo_seq_ops = {
691	.start	= devinfo_seq_start,
692	.next	= devinfo_seq_next,
693	.stop	= devinfo_seq_stop,
694	.show	= devinfo_seq_show,
695};
696
697static int proc_scsi_devinfo_open(struct inode *inode, struct file *file)
698{
699	return seq_open(file, &scsi_devinfo_seq_ops);
700}
701
702/*
703 * proc_scsi_dev_info_write - allow additions to scsi_dev_info_list via /proc.
704 *
705 * Description: Adds a black/white list entry for vendor and model with an
706 * integer value of flag to the scsi device info list.
707 * To use, echo "vendor:model:flag" > /proc/scsi/device_info
708 */
709static ssize_t proc_scsi_devinfo_write(struct file *file,
710				       const char __user *buf,
711				       size_t length, loff_t *ppos)
712{
713	char *buffer;
714	ssize_t err = length;
715
716	if (!buf || length>PAGE_SIZE)
717		return -EINVAL;
718	if (!(buffer = (char *) __get_free_page(GFP_KERNEL)))
719		return -ENOMEM;
720	if (copy_from_user(buffer, buf, length)) {
721		err =-EFAULT;
722		goto out;
723	}
724
725	if (length < PAGE_SIZE)
726		buffer[length] = '\0';
727	else if (buffer[PAGE_SIZE-1]) {
728		err = -EINVAL;
729		goto out;
730	}
731
732	scsi_dev_info_list_add_str(buffer);
733
734out:
735	free_page((unsigned long)buffer);
736	return err;
737}
738
739static const struct proc_ops scsi_devinfo_proc_ops = {
740	.proc_open	= proc_scsi_devinfo_open,
741	.proc_read	= seq_read,
742	.proc_write	= proc_scsi_devinfo_write,
743	.proc_lseek	= seq_lseek,
744	.proc_release	= seq_release,
745};
746#endif /* CONFIG_SCSI_PROC_FS */
747
748module_param_string(dev_flags, scsi_dev_flags, sizeof(scsi_dev_flags), 0);
749MODULE_PARM_DESC(dev_flags,
750	 "Given scsi_dev_flags=vendor:model:flags[,v:m:f] add black/white"
751	 " list entries for vendor and model with an integer value of flags"
752	 " to the scsi device info list");
753
754module_param_named(default_dev_flags, scsi_default_dev_flags, ullong, 0644);
755MODULE_PARM_DESC(default_dev_flags,
756		 "scsi default device flag uint64_t value");
757
758/**
759 * scsi_exit_devinfo - remove /proc/scsi/device_info & the scsi_dev_info_list
760 **/
761void scsi_exit_devinfo(void)
762{
763#ifdef CONFIG_SCSI_PROC_FS
764	remove_proc_entry("scsi/device_info", NULL);
765#endif
766
767	scsi_dev_info_remove_list(SCSI_DEVINFO_GLOBAL);
768}
769
770/**
771 * scsi_dev_info_add_list - add a new devinfo list
772 * @key:	key of the list to add
773 * @name:	Name of the list to add (for /proc/scsi/device_info)
774 *
775 * Adds the requested list, returns zero on success, -EEXIST if the
776 * key is already registered to a list, or other error on failure.
777 */
778int scsi_dev_info_add_list(enum scsi_devinfo_key key, const char *name)
779{
780	struct scsi_dev_info_list_table *devinfo_table =
781		scsi_devinfo_lookup_by_key(key);
782
783	if (!IS_ERR(devinfo_table))
784		/* list already exists */
785		return -EEXIST;
786
787	devinfo_table = kmalloc(sizeof(*devinfo_table), GFP_KERNEL);
788
789	if (!devinfo_table)
790		return -ENOMEM;
791
792	INIT_LIST_HEAD(&devinfo_table->node);
793	INIT_LIST_HEAD(&devinfo_table->scsi_dev_info_list);
794	devinfo_table->name = name;
795	devinfo_table->key = key;
796	list_add_tail(&devinfo_table->node, &scsi_dev_info_list);
797
798	return 0;
799}
800EXPORT_SYMBOL(scsi_dev_info_add_list);
801
802/**
803 * scsi_dev_info_remove_list - destroy an added devinfo list
804 * @key: key of the list to destroy
805 *
806 * Iterates over the entire list first, freeing all the values, then
807 * frees the list itself.  Returns 0 on success or -EINVAL if the key
808 * can't be found.
809 */
810int scsi_dev_info_remove_list(enum scsi_devinfo_key key)
811{
812	struct list_head *lh, *lh_next;
813	struct scsi_dev_info_list_table *devinfo_table =
814		scsi_devinfo_lookup_by_key(key);
815
816	if (IS_ERR(devinfo_table))
817		/* no such list */
818		return -EINVAL;
819
820	/* remove from the master list */
821	list_del(&devinfo_table->node);
822
823	list_for_each_safe(lh, lh_next, &devinfo_table->scsi_dev_info_list) {
824		struct scsi_dev_info_list *devinfo;
825
826		devinfo = list_entry(lh, struct scsi_dev_info_list,
827				     dev_info_list);
828		kfree(devinfo);
829	}
830	kfree(devinfo_table);
831
832	return 0;
833}
834EXPORT_SYMBOL(scsi_dev_info_remove_list);
835
836/**
837 * scsi_init_devinfo - set up the dynamic device list.
838 *
839 * Description:
840 *	Add command line entries from scsi_dev_flags, then add
841 *	scsi_static_device_list entries to the scsi device info list.
842 */
843int __init scsi_init_devinfo(void)
844{
845#ifdef CONFIG_SCSI_PROC_FS
846	struct proc_dir_entry *p;
847#endif
848	int error, i;
849
850	error = scsi_dev_info_add_list(SCSI_DEVINFO_GLOBAL, NULL);
851	if (error)
852		return error;
853
854	error = scsi_dev_info_list_add_str(scsi_dev_flags);
855	if (error)
856		goto out;
857
858	for (i = 0; scsi_static_device_list[i].vendor; i++) {
859		error = scsi_dev_info_list_add(1 /* compatibile */,
860				scsi_static_device_list[i].vendor,
861				scsi_static_device_list[i].model,
862				NULL,
863				scsi_static_device_list[i].flags);
864		if (error)
865			goto out;
866	}
867
868#ifdef CONFIG_SCSI_PROC_FS
869	p = proc_create("scsi/device_info", 0, NULL, &scsi_devinfo_proc_ops);
870	if (!p) {
871		error = -ENOMEM;
872		goto out;
873	}
874#endif /* CONFIG_SCSI_PROC_FS */
875
876 out:
877	if (error)
878		scsi_exit_devinfo();
879	return error;
880}