Commit | Line | Data |
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6a55d2cd | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> |
4 | * Horst Hummel <Horst.Hummel@de.ibm.com> | |
5 | * Carsten Otte <Cotte@de.ibm.com> | |
6 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
7 | * Bugreports.to..: <Linux390@de.ibm.com> | |
a53c8fab | 8 | * Copyright IBM Corp. 1999,2001 |
1da177e4 LT |
9 | * |
10 | * Device mapping and dasd= parameter parsing functions. All devmap | |
11 | * functions may not be called from interrupt context. In particular | |
12 | * dasd_get_device is a no-no from interrupt context. | |
13 | * | |
1da177e4 LT |
14 | */ |
15 | ||
fc19f381 SH |
16 | #define KMSG_COMPONENT "dasd" |
17 | ||
1da177e4 LT |
18 | #include <linux/ctype.h> |
19 | #include <linux/init.h> | |
8d3b33f6 | 20 | #include <linux/module.h> |
5a0e3ad6 | 21 | #include <linux/slab.h> |
1da177e4 LT |
22 | |
23 | #include <asm/debug.h> | |
7c0f6ba6 | 24 | #include <linux/uaccess.h> |
7039d3a1 | 25 | #include <asm/ipl.h> |
1da177e4 LT |
26 | |
27 | /* This is ugly... */ | |
28 | #define PRINTK_HEADER "dasd_devmap:" | |
09762dcb | 29 | #define DASD_MAX_PARAMS 256 |
1da177e4 LT |
30 | |
31 | #include "dasd_int.h" | |
32 | ||
e18b890b | 33 | struct kmem_cache *dasd_page_cache; |
40545573 | 34 | EXPORT_SYMBOL_GPL(dasd_page_cache); |
1da177e4 LT |
35 | |
36 | /* | |
37 | * dasd_devmap_t is used to store the features and the relation | |
38 | * between device number and device index. To find a dasd_devmap_t | |
39 | * that corresponds to a device number of a device index each | |
40 | * dasd_devmap_t is added to two linked lists, one to search by | |
41 | * the device number and one to search by the device index. As | |
42 | * soon as big minor numbers are available the device index list | |
43 | * can be removed since the device number will then be identical | |
44 | * to the device index. | |
45 | */ | |
46 | struct dasd_devmap { | |
47 | struct list_head list; | |
98df67b3 | 48 | char bus_id[DASD_BUS_ID_SIZE]; |
1da177e4 LT |
49 | unsigned int devindex; |
50 | unsigned short features; | |
51 | struct dasd_device *device; | |
a91ff09d | 52 | struct dasd_copy_relation *copy; |
1da177e4 LT |
53 | }; |
54 | ||
55 | /* | |
56 | * Parameter parsing functions for dasd= parameter. The syntax is: | |
57 | * <devno> : (0x)?[0-9a-fA-F]+ | |
58 | * <busid> : [0-0a-f]\.[0-9a-f]\.(0x)?[0-9a-fA-F]+ | |
59 | * <feature> : ro | |
60 | * <feature_list> : \(<feature>(:<feature>)*\) | |
61 | * <devno-range> : <devno>(-<devno>)?<feature_list>? | |
62 | * <busid-range> : <busid>(-<busid>)?<feature_list>? | |
63 | * <devices> : <devno-range>|<busid-range> | |
64 | * <dasd_module> : dasd_diag_mod|dasd_eckd_mod|dasd_fba_mod | |
65 | * | |
66 | * <dasd> : autodetect|probeonly|<devices>(,<devices>)* | |
67 | */ | |
68 | ||
69 | int dasd_probeonly = 0; /* is true, when probeonly mode is active */ | |
70 | int dasd_autodetect = 0; /* is true, when autodetection is active */ | |
40545573 HH |
71 | int dasd_nopav = 0; /* is true, when PAV is disabled */ |
72 | EXPORT_SYMBOL_GPL(dasd_nopav); | |
f3eb5384 SW |
73 | int dasd_nofcx; /* disable High Performance Ficon */ |
74 | EXPORT_SYMBOL_GPL(dasd_nofcx); | |
1da177e4 LT |
75 | |
76 | /* | |
77 | * char *dasd[] is intended to hold the ranges supplied by the dasd= statement | |
78 | * it is named 'dasd' to directly be filled by insmod with the comma separated | |
79 | * strings when running as a module. | |
80 | */ | |
09762dcb | 81 | static char *dasd[DASD_MAX_PARAMS]; |
3b126935 | 82 | module_param_array(dasd, charp, NULL, S_IRUGO); |
8d3b33f6 | 83 | |
1da177e4 | 84 | /* |
d0710c7c | 85 | * Single spinlock to protect devmap and servermap structures and lists. |
1da177e4 LT |
86 | */ |
87 | static DEFINE_SPINLOCK(dasd_devmap_lock); | |
88 | ||
89 | /* | |
90 | * Hash lists for devmap structures. | |
91 | */ | |
92 | static struct list_head dasd_hashlists[256]; | |
93 | int dasd_max_devindex; | |
94 | ||
69f90f6a | 95 | static struct dasd_devmap *dasd_add_busid(const char *, int); |
1da177e4 LT |
96 | |
97 | static inline int | |
69f90f6a | 98 | dasd_hash_busid(const char *bus_id) |
1da177e4 LT |
99 | { |
100 | int hash, i; | |
101 | ||
102 | hash = 0; | |
98df67b3 | 103 | for (i = 0; (i < DASD_BUS_ID_SIZE) && *bus_id; i++, bus_id++) |
1da177e4 LT |
104 | hash += *bus_id; |
105 | return hash & 0xff; | |
106 | } | |
107 | ||
108 | #ifndef MODULE | |
09762dcb | 109 | static int __init dasd_call_setup(char *opt) |
1da177e4 | 110 | { |
3b1bea01 | 111 | static int i __initdata; |
09762dcb JH |
112 | char *tmp; |
113 | ||
114 | while (i < DASD_MAX_PARAMS) { | |
115 | tmp = strsep(&opt, ","); | |
116 | if (!tmp) | |
117 | break; | |
118 | ||
119 | dasd[i++] = tmp; | |
120 | } | |
1da177e4 | 121 | |
1da177e4 LT |
122 | return 1; |
123 | } | |
124 | ||
125 | __setup ("dasd=", dasd_call_setup); | |
126 | #endif /* #ifndef MODULE */ | |
127 | ||
7039d3a1 PO |
128 | #define DASD_IPLDEV "ipldev" |
129 | ||
1da177e4 LT |
130 | /* |
131 | * Read a device busid/devno from a string. | |
132 | */ | |
a91ff09d | 133 | static int dasd_busid(char *str, int *id0, int *id1, int *devno) |
1da177e4 | 134 | { |
3b1bea01 JH |
135 | unsigned int val; |
136 | char *tok; | |
138c014d | 137 | |
7039d3a1 | 138 | /* Interpret ipldev busid */ |
3b1bea01 | 139 | if (strncmp(DASD_IPLDEV, str, strlen(DASD_IPLDEV)) == 0) { |
7039d3a1 | 140 | if (ipl_info.type != IPL_TYPE_CCW) { |
fc19f381 | 141 | pr_err("The IPL device is not a CCW device\n"); |
7039d3a1 PO |
142 | return -EINVAL; |
143 | } | |
144 | *id0 = 0; | |
145 | *id1 = ipl_info.data.ccw.dev_id.ssid; | |
146 | *devno = ipl_info.data.ccw.dev_id.devno; | |
7039d3a1 PO |
147 | |
148 | return 0; | |
149 | } | |
3b1bea01 JH |
150 | |
151 | /* Old style 0xXXXX or XXXX */ | |
152 | if (!kstrtouint(str, 16, &val)) { | |
1da177e4 | 153 | *id0 = *id1 = 0; |
4bca698f | 154 | if (val > 0xffff) |
1da177e4 LT |
155 | return -EINVAL; |
156 | *devno = val; | |
157 | return 0; | |
158 | } | |
3b1bea01 | 159 | |
1da177e4 | 160 | /* New style x.y.z busid */ |
3b1bea01 JH |
161 | tok = strsep(&str, "."); |
162 | if (kstrtouint(tok, 16, &val) || val > 0xff) | |
1da177e4 LT |
163 | return -EINVAL; |
164 | *id0 = val; | |
3b1bea01 JH |
165 | |
166 | tok = strsep(&str, "."); | |
167 | if (kstrtouint(tok, 16, &val) || val > 0xff) | |
1da177e4 LT |
168 | return -EINVAL; |
169 | *id1 = val; | |
3b1bea01 JH |
170 | |
171 | tok = strsep(&str, "."); | |
172 | if (kstrtouint(tok, 16, &val) || val > 0xffff) | |
1da177e4 LT |
173 | return -EINVAL; |
174 | *devno = val; | |
3b1bea01 | 175 | |
1da177e4 LT |
176 | return 0; |
177 | } | |
178 | ||
179 | /* | |
3b1bea01 | 180 | * Read colon separated list of dasd features. |
1da177e4 | 181 | */ |
3b1bea01 | 182 | static int __init dasd_feature_list(char *str) |
1da177e4 LT |
183 | { |
184 | int features, len, rc; | |
185 | ||
3b1bea01 | 186 | features = 0; |
1da177e4 | 187 | rc = 0; |
3b1bea01 JH |
188 | |
189 | if (!str) | |
1da177e4 | 190 | return DASD_FEATURE_DEFAULT; |
1da177e4 LT |
191 | |
192 | while (1) { | |
138c014d | 193 | for (len = 0; |
1da177e4 LT |
194 | str[len] && str[len] != ':' && str[len] != ')'; len++); |
195 | if (len == 2 && !strncmp(str, "ro", 2)) | |
196 | features |= DASD_FEATURE_READONLY; | |
197 | else if (len == 4 && !strncmp(str, "diag", 4)) | |
198 | features |= DASD_FEATURE_USEDIAG; | |
e4dbb0f2 SH |
199 | else if (len == 3 && !strncmp(str, "raw", 3)) |
200 | features |= DASD_FEATURE_USERAW; | |
9575bf26 HH |
201 | else if (len == 6 && !strncmp(str, "erplog", 6)) |
202 | features |= DASD_FEATURE_ERPLOG; | |
13de227b HS |
203 | else if (len == 8 && !strncmp(str, "failfast", 8)) |
204 | features |= DASD_FEATURE_FAILFAST; | |
1da177e4 | 205 | else { |
83eb1a41 | 206 | pr_warn("%.*s is not a supported device option\n", |
baebc70a | 207 | len, str); |
1da177e4 LT |
208 | rc = -EINVAL; |
209 | } | |
210 | str += len; | |
211 | if (*str != ':') | |
212 | break; | |
213 | str++; | |
214 | } | |
3b1bea01 JH |
215 | |
216 | return rc ? : features; | |
1da177e4 LT |
217 | } |
218 | ||
219 | /* | |
220 | * Try to match the first element on the comma separated parse string | |
221 | * with one of the known keywords. If a keyword is found, take the approprate | |
222 | * action and return a pointer to the residual string. If the first element | |
223 | * could not be matched to any keyword then return an error code. | |
224 | */ | |
3b1bea01 JH |
225 | static int __init dasd_parse_keyword(char *keyword) |
226 | { | |
227 | int length = strlen(keyword); | |
1da177e4 | 228 | |
3b1bea01 | 229 | if (strncmp("autodetect", keyword, length) == 0) { |
1da177e4 | 230 | dasd_autodetect = 1; |
fc19f381 | 231 | pr_info("The autodetection mode has been activated\n"); |
3b1bea01 | 232 | return 0; |
1da177e4 | 233 | } |
3b1bea01 | 234 | if (strncmp("probeonly", keyword, length) == 0) { |
1da177e4 | 235 | dasd_probeonly = 1; |
fc19f381 | 236 | pr_info("The probeonly mode has been activated\n"); |
3b1bea01 | 237 | return 0; |
1da177e4 | 238 | } |
3b1bea01 | 239 | if (strncmp("nopav", keyword, length) == 0) { |
dcd707b4 | 240 | if (MACHINE_IS_VM) |
fc19f381 | 241 | pr_info("'nopav' is not supported on z/VM\n"); |
dcd707b4 PO |
242 | else { |
243 | dasd_nopav = 1; | |
fc19f381 | 244 | pr_info("PAV support has be deactivated\n"); |
dcd707b4 | 245 | } |
3b1bea01 | 246 | return 0; |
40545573 | 247 | } |
3b1bea01 | 248 | if (strncmp("nofcx", keyword, length) == 0) { |
f3eb5384 | 249 | dasd_nofcx = 1; |
fc19f381 SH |
250 | pr_info("High Performance FICON support has been " |
251 | "deactivated\n"); | |
3b1bea01 | 252 | return 0; |
f3eb5384 | 253 | } |
3b1bea01 | 254 | if (strncmp("fixedbuffers", keyword, length) == 0) { |
1da177e4 | 255 | if (dasd_page_cache) |
3b1bea01 | 256 | return 0; |
1da177e4 | 257 | dasd_page_cache = |
2f6c55fc HC |
258 | kmem_cache_create("dasd_page_cache", PAGE_SIZE, |
259 | PAGE_SIZE, SLAB_CACHE_DMA, | |
20c2df83 | 260 | NULL); |
1da177e4 | 261 | if (!dasd_page_cache) |
fc19f381 | 262 | DBF_EVENT(DBF_WARNING, "%s", "Failed to create slab, " |
1da177e4 LT |
263 | "fixed buffer mode disabled."); |
264 | else | |
fc19f381 | 265 | DBF_EVENT(DBF_INFO, "%s", |
1da177e4 | 266 | "turning on fixed buffer mode"); |
3b1bea01 JH |
267 | return 0; |
268 | } | |
269 | ||
270 | return -EINVAL; | |
1da177e4 LT |
271 | } |
272 | ||
273 | /* | |
3b1bea01 JH |
274 | * Split a string of a device range into its pieces and return the from, to, and |
275 | * feature parts separately. | |
276 | * e.g.: | |
277 | * 0.0.1234-0.0.5678(ro:erplog) -> from: 0.0.1234 to: 0.0.5678 features: ro:erplog | |
278 | * 0.0.8765(raw) -> from: 0.0.8765 to: null features: raw | |
279 | * 0x4321 -> from: 0x4321 to: null features: null | |
1da177e4 | 280 | */ |
3b1bea01 JH |
281 | static int __init dasd_evaluate_range_param(char *range, char **from_str, |
282 | char **to_str, char **features_str) | |
283 | { | |
284 | int rc = 0; | |
285 | ||
286 | /* Do we have a range or a single device? */ | |
287 | if (strchr(range, '-')) { | |
288 | *from_str = strsep(&range, "-"); | |
289 | *to_str = strsep(&range, "("); | |
290 | *features_str = strsep(&range, ")"); | |
291 | } else { | |
292 | *from_str = strsep(&range, "("); | |
293 | *features_str = strsep(&range, ")"); | |
294 | } | |
295 | ||
296 | if (*features_str && !range) { | |
297 | pr_warn("A closing parenthesis ')' is missing in the dasd= parameter\n"); | |
298 | rc = -EINVAL; | |
299 | } | |
1da177e4 | 300 | |
3b1bea01 JH |
301 | return rc; |
302 | } | |
303 | ||
304 | /* | |
305 | * Try to interprete the range string as a device number or a range of devices. | |
306 | * If the interpretation is successful, create the matching dasd_devmap entries. | |
307 | * If interpretation fails or in case of an error, return an error code. | |
308 | */ | |
309 | static int __init dasd_parse_range(const char *range) | |
310 | { | |
1da177e4 LT |
311 | struct dasd_devmap *devmap; |
312 | int from, from_id0, from_id1; | |
313 | int to, to_id0, to_id1; | |
3b1bea01 JH |
314 | int features; |
315 | char bus_id[DASD_BUS_ID_SIZE + 1]; | |
316 | char *features_str = NULL; | |
317 | char *from_str = NULL; | |
318 | char *to_str = NULL; | |
3050c208 JH |
319 | int rc = 0; |
320 | char *tmp; | |
3b1bea01 | 321 | |
3050c208 JH |
322 | tmp = kstrdup(range, GFP_KERNEL); |
323 | if (!tmp) | |
324 | return -ENOMEM; | |
3b1bea01 | 325 | |
3050c208 JH |
326 | if (dasd_evaluate_range_param(tmp, &from_str, &to_str, &features_str)) { |
327 | rc = -EINVAL; | |
328 | goto out; | |
329 | } | |
3b1bea01 | 330 | |
3050c208 JH |
331 | if (dasd_busid(from_str, &from_id0, &from_id1, &from)) { |
332 | rc = -EINVAL; | |
333 | goto out; | |
334 | } | |
3b1bea01 JH |
335 | |
336 | to = from; | |
337 | to_id0 = from_id0; | |
338 | to_id1 = from_id1; | |
339 | if (to_str) { | |
3050c208 JH |
340 | if (dasd_busid(to_str, &to_id0, &to_id1, &to)) { |
341 | rc = -EINVAL; | |
342 | goto out; | |
343 | } | |
3b1bea01 JH |
344 | if (from_id0 != to_id0 || from_id1 != to_id1 || from > to) { |
345 | pr_err("%s is not a valid device range\n", range); | |
3050c208 JH |
346 | rc = -EINVAL; |
347 | goto out; | |
1da177e4 LT |
348 | } |
349 | } | |
3b1bea01 JH |
350 | |
351 | features = dasd_feature_list(features_str); | |
3050c208 JH |
352 | if (features < 0) { |
353 | rc = -EINVAL; | |
354 | goto out; | |
355 | } | |
40545573 HH |
356 | /* each device in dasd= parameter should be set initially online */ |
357 | features |= DASD_FEATURE_INITIAL_ONLINE; | |
1da177e4 | 358 | while (from <= to) { |
3b1bea01 | 359 | sprintf(bus_id, "%01x.%01x.%04x", from_id0, from_id1, from++); |
1da177e4 | 360 | devmap = dasd_add_busid(bus_id, features); |
3050c208 JH |
361 | if (IS_ERR(devmap)) { |
362 | rc = PTR_ERR(devmap); | |
363 | goto out; | |
364 | } | |
1da177e4 | 365 | } |
1da177e4 | 366 | |
3050c208 JH |
367 | out: |
368 | kfree(tmp); | |
3b1bea01 | 369 | |
3050c208 | 370 | return rc; |
1da177e4 LT |
371 | } |
372 | ||
373 | /* | |
374 | * Parse parameters stored in dasd[] | |
375 | * The 'dasd=...' parameter allows to specify a comma separated list of | |
09762dcb JH |
376 | * keywords and device ranges. The parameters in that list will be stored as |
377 | * separate elementes in dasd[]. | |
1da177e4 | 378 | */ |
3b1bea01 | 379 | int __init dasd_parse(void) |
1da177e4 LT |
380 | { |
381 | int rc, i; | |
3b1bea01 | 382 | char *cur; |
1da177e4 LT |
383 | |
384 | rc = 0; | |
09762dcb | 385 | for (i = 0; i < DASD_MAX_PARAMS; i++) { |
3b1bea01 JH |
386 | cur = dasd[i]; |
387 | if (!cur) | |
1da177e4 | 388 | break; |
3b1bea01 JH |
389 | if (*cur == '\0') |
390 | continue; | |
391 | ||
392 | rc = dasd_parse_keyword(cur); | |
393 | if (rc) | |
394 | rc = dasd_parse_range(cur); | |
395 | ||
396 | if (rc) | |
1da177e4 | 397 | break; |
1da177e4 | 398 | } |
3b1bea01 | 399 | |
1da177e4 LT |
400 | return rc; |
401 | } | |
402 | ||
403 | /* | |
404 | * Add a devmap for the device specified by busid. It is possible that | |
405 | * the devmap already exists (dasd= parameter). The order of the devices | |
406 | * added through this function will define the kdevs for the individual | |
138c014d | 407 | * devices. |
1da177e4 LT |
408 | */ |
409 | static struct dasd_devmap * | |
69f90f6a | 410 | dasd_add_busid(const char *bus_id, int features) |
1da177e4 LT |
411 | { |
412 | struct dasd_devmap *devmap, *new, *tmp; | |
413 | int hash; | |
414 | ||
006485dc | 415 | new = kzalloc(sizeof(struct dasd_devmap), GFP_KERNEL); |
1da177e4 LT |
416 | if (!new) |
417 | return ERR_PTR(-ENOMEM); | |
418 | spin_lock(&dasd_devmap_lock); | |
d2c993d8 | 419 | devmap = NULL; |
1da177e4 LT |
420 | hash = dasd_hash_busid(bus_id); |
421 | list_for_each_entry(tmp, &dasd_hashlists[hash], list) | |
98df67b3 | 422 | if (strncmp(tmp->bus_id, bus_id, DASD_BUS_ID_SIZE) == 0) { |
1da177e4 LT |
423 | devmap = tmp; |
424 | break; | |
425 | } | |
426 | if (!devmap) { | |
427 | /* This bus_id is new. */ | |
428 | new->devindex = dasd_max_devindex++; | |
c6756b7d | 429 | strlcpy(new->bus_id, bus_id, DASD_BUS_ID_SIZE); |
1da177e4 | 430 | new->features = features; |
d2c993d8 | 431 | new->device = NULL; |
1da177e4 LT |
432 | list_add(&new->list, &dasd_hashlists[hash]); |
433 | devmap = new; | |
d2c993d8 | 434 | new = NULL; |
1da177e4 LT |
435 | } |
436 | spin_unlock(&dasd_devmap_lock); | |
17fd682e | 437 | kfree(new); |
1da177e4 LT |
438 | return devmap; |
439 | } | |
440 | ||
1da177e4 | 441 | static struct dasd_devmap * |
a91ff09d | 442 | dasd_find_busid_locked(const char *bus_id) |
1da177e4 LT |
443 | { |
444 | struct dasd_devmap *devmap, *tmp; | |
445 | int hash; | |
446 | ||
1da177e4 LT |
447 | devmap = ERR_PTR(-ENODEV); |
448 | hash = dasd_hash_busid(bus_id); | |
449 | list_for_each_entry(tmp, &dasd_hashlists[hash], list) { | |
98df67b3 | 450 | if (strncmp(tmp->bus_id, bus_id, DASD_BUS_ID_SIZE) == 0) { |
1da177e4 LT |
451 | devmap = tmp; |
452 | break; | |
453 | } | |
454 | } | |
a91ff09d SH |
455 | return devmap; |
456 | } | |
457 | ||
458 | /* | |
459 | * Find devmap for device with given bus_id. | |
460 | */ | |
461 | static struct dasd_devmap * | |
462 | dasd_find_busid(const char *bus_id) | |
463 | { | |
464 | struct dasd_devmap *devmap; | |
465 | ||
466 | spin_lock(&dasd_devmap_lock); | |
467 | devmap = dasd_find_busid_locked(bus_id); | |
1da177e4 LT |
468 | spin_unlock(&dasd_devmap_lock); |
469 | return devmap; | |
470 | } | |
471 | ||
472 | /* | |
473 | * Check if busid has been added to the list of dasd ranges. | |
474 | */ | |
475 | int | |
69f90f6a | 476 | dasd_busid_known(const char *bus_id) |
1da177e4 LT |
477 | { |
478 | return IS_ERR(dasd_find_busid(bus_id)) ? -ENOENT : 0; | |
479 | } | |
480 | ||
481 | /* | |
482 | * Forget all about the device numbers added so far. | |
483 | * This may only be called at module unload or system shutdown. | |
484 | */ | |
485 | static void | |
486 | dasd_forget_ranges(void) | |
487 | { | |
488 | struct dasd_devmap *devmap, *n; | |
489 | int i; | |
490 | ||
491 | spin_lock(&dasd_devmap_lock); | |
492 | for (i = 0; i < 256; i++) { | |
493 | list_for_each_entry_safe(devmap, n, &dasd_hashlists[i], list) { | |
606f4422 | 494 | BUG_ON(devmap->device != NULL); |
1da177e4 LT |
495 | list_del(&devmap->list); |
496 | kfree(devmap); | |
497 | } | |
498 | } | |
499 | spin_unlock(&dasd_devmap_lock); | |
500 | } | |
501 | ||
502 | /* | |
503 | * Find the device struct by its device index. | |
504 | */ | |
505 | struct dasd_device * | |
506 | dasd_device_from_devindex(int devindex) | |
507 | { | |
508 | struct dasd_devmap *devmap, *tmp; | |
509 | struct dasd_device *device; | |
510 | int i; | |
511 | ||
512 | spin_lock(&dasd_devmap_lock); | |
d2c993d8 | 513 | devmap = NULL; |
1da177e4 LT |
514 | for (i = 0; (i < 256) && !devmap; i++) |
515 | list_for_each_entry(tmp, &dasd_hashlists[i], list) | |
516 | if (tmp->devindex == devindex) { | |
517 | /* Found the devmap for the device. */ | |
518 | devmap = tmp; | |
519 | break; | |
520 | } | |
521 | if (devmap && devmap->device) { | |
522 | device = devmap->device; | |
523 | dasd_get_device(device); | |
524 | } else | |
525 | device = ERR_PTR(-ENODEV); | |
526 | spin_unlock(&dasd_devmap_lock); | |
527 | return device; | |
528 | } | |
529 | ||
530 | /* | |
531 | * Return devmap for cdev. If no devmap exists yet, create one and | |
532 | * connect it to the cdev. | |
533 | */ | |
534 | static struct dasd_devmap * | |
535 | dasd_devmap_from_cdev(struct ccw_device *cdev) | |
536 | { | |
537 | struct dasd_devmap *devmap; | |
538 | ||
2a0217d5 | 539 | devmap = dasd_find_busid(dev_name(&cdev->dev)); |
1da177e4 | 540 | if (IS_ERR(devmap)) |
2a0217d5 | 541 | devmap = dasd_add_busid(dev_name(&cdev->dev), |
1da177e4 LT |
542 | DASD_FEATURE_DEFAULT); |
543 | return devmap; | |
544 | } | |
545 | ||
546 | /* | |
547 | * Create a dasd device structure for cdev. | |
548 | */ | |
549 | struct dasd_device * | |
550 | dasd_create_device(struct ccw_device *cdev) | |
551 | { | |
552 | struct dasd_devmap *devmap; | |
553 | struct dasd_device *device; | |
a00bfd71 | 554 | unsigned long flags; |
1da177e4 LT |
555 | int rc; |
556 | ||
557 | devmap = dasd_devmap_from_cdev(cdev); | |
558 | if (IS_ERR(devmap)) | |
559 | return (void *) devmap; | |
1da177e4 LT |
560 | |
561 | device = dasd_alloc_device(); | |
562 | if (IS_ERR(device)) | |
563 | return device; | |
a00bfd71 | 564 | atomic_set(&device->ref_count, 3); |
1da177e4 LT |
565 | |
566 | spin_lock(&dasd_devmap_lock); | |
567 | if (!devmap->device) { | |
568 | devmap->device = device; | |
569 | device->devindex = devmap->devindex; | |
c6eb7b77 | 570 | device->features = devmap->features; |
1da177e4 LT |
571 | get_device(&cdev->dev); |
572 | device->cdev = cdev; | |
573 | rc = 0; | |
574 | } else | |
575 | /* Someone else was faster. */ | |
576 | rc = -EBUSY; | |
577 | spin_unlock(&dasd_devmap_lock); | |
578 | ||
579 | if (rc) { | |
580 | dasd_free_device(device); | |
581 | return ERR_PTR(rc); | |
582 | } | |
a00bfd71 MS |
583 | |
584 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); | |
faf16aa9 | 585 | dev_set_drvdata(&cdev->dev, device); |
a00bfd71 MS |
586 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); |
587 | ||
19508b20 JH |
588 | device->paths_info = kset_create_and_add("paths_info", NULL, |
589 | &device->cdev->dev.kobj); | |
590 | if (!device->paths_info) | |
591 | dev_warn(&cdev->dev, "Could not create paths_info kset\n"); | |
592 | ||
1da177e4 LT |
593 | return device; |
594 | } | |
595 | ||
a91ff09d SH |
596 | /* |
597 | * allocate a PPRC data structure and call the discipline function to fill | |
598 | */ | |
599 | static int dasd_devmap_get_pprc_status(struct dasd_device *device, | |
600 | struct dasd_pprc_data_sc4 **data) | |
601 | { | |
602 | struct dasd_pprc_data_sc4 *temp; | |
603 | ||
604 | if (!device->discipline || !device->discipline->pprc_status) { | |
605 | dev_warn(&device->cdev->dev, "Unable to query copy relation status\n"); | |
606 | return -EOPNOTSUPP; | |
607 | } | |
608 | temp = kzalloc(sizeof(*temp), GFP_KERNEL); | |
609 | if (!temp) | |
610 | return -ENOMEM; | |
611 | ||
612 | /* get PPRC information from storage */ | |
613 | if (device->discipline->pprc_status(device, temp)) { | |
614 | dev_warn(&device->cdev->dev, "Error during copy relation status query\n"); | |
615 | kfree(temp); | |
616 | return -EINVAL; | |
617 | } | |
618 | *data = temp; | |
619 | ||
620 | return 0; | |
621 | } | |
622 | ||
623 | /* | |
624 | * find an entry in a PPRC device_info array by a given UID | |
625 | * depending on the primary/secondary state of the device it has to be | |
626 | * matched with the respective fields | |
627 | */ | |
628 | static int dasd_devmap_entry_from_pprc_data(struct dasd_pprc_data_sc4 *data, | |
629 | struct dasd_uid uid, | |
630 | bool primary) | |
631 | { | |
632 | int i; | |
633 | ||
634 | for (i = 0; i < DASD_CP_ENTRIES; i++) { | |
635 | if (primary) { | |
636 | if (data->dev_info[i].prim_cu_ssid == uid.ssid && | |
637 | data->dev_info[i].primary == uid.real_unit_addr) | |
638 | return i; | |
639 | } else { | |
640 | if (data->dev_info[i].sec_cu_ssid == uid.ssid && | |
641 | data->dev_info[i].secondary == uid.real_unit_addr) | |
642 | return i; | |
643 | } | |
644 | } | |
645 | return -1; | |
646 | } | |
647 | ||
648 | /* | |
649 | * check the consistency of a specified copy relation by checking | |
650 | * the following things: | |
651 | * | |
652 | * - is the given device part of a copy pair setup | |
653 | * - does the state of the device match the state in the PPRC status data | |
654 | * - does the device UID match with the UID in the PPRC status data | |
655 | * - to prevent misrouted IO check if the given device is present in all | |
656 | * related PPRC status data | |
657 | */ | |
658 | static int dasd_devmap_check_copy_relation(struct dasd_device *device, | |
659 | struct dasd_copy_entry *entry, | |
660 | struct dasd_pprc_data_sc4 *data, | |
661 | struct dasd_copy_relation *copy) | |
662 | { | |
663 | struct dasd_pprc_data_sc4 *tmp_dat; | |
664 | struct dasd_device *tmp_dev; | |
665 | struct dasd_uid uid; | |
666 | int i, j; | |
667 | ||
668 | if (!device->discipline || !device->discipline->get_uid || | |
669 | device->discipline->get_uid(device, &uid)) | |
670 | return 1; | |
671 | ||
672 | i = dasd_devmap_entry_from_pprc_data(data, uid, entry->primary); | |
673 | if (i < 0) { | |
674 | dev_warn(&device->cdev->dev, "Device not part of a copy relation\n"); | |
675 | return 1; | |
676 | } | |
677 | ||
678 | /* double check which role the current device has */ | |
679 | if (entry->primary) { | |
680 | if (data->dev_info[i].flags & 0x80) { | |
681 | dev_warn(&device->cdev->dev, "Copy pair secondary is setup as primary\n"); | |
682 | return 1; | |
683 | } | |
684 | if (data->dev_info[i].prim_cu_ssid != uid.ssid || | |
685 | data->dev_info[i].primary != uid.real_unit_addr) { | |
686 | dev_warn(&device->cdev->dev, | |
687 | "Primary device %s does not match copy pair status primary device %04x\n", | |
688 | dev_name(&device->cdev->dev), | |
689 | data->dev_info[i].prim_cu_ssid | | |
690 | data->dev_info[i].primary); | |
691 | return 1; | |
692 | } | |
693 | } else { | |
694 | if (!(data->dev_info[i].flags & 0x80)) { | |
695 | dev_warn(&device->cdev->dev, "Copy pair primary is setup as secondary\n"); | |
696 | return 1; | |
697 | } | |
698 | if (data->dev_info[i].sec_cu_ssid != uid.ssid || | |
699 | data->dev_info[i].secondary != uid.real_unit_addr) { | |
700 | dev_warn(&device->cdev->dev, | |
701 | "Secondary device %s does not match copy pair status secondary device %04x\n", | |
702 | dev_name(&device->cdev->dev), | |
703 | data->dev_info[i].sec_cu_ssid | | |
704 | data->dev_info[i].secondary); | |
705 | return 1; | |
706 | } | |
707 | } | |
708 | ||
709 | /* | |
710 | * the current device has to be part of the copy relation of all | |
711 | * entries to prevent misrouted IO to another copy pair | |
712 | */ | |
713 | for (j = 0; j < DASD_CP_ENTRIES; j++) { | |
714 | if (entry == ©->entry[j]) | |
715 | tmp_dev = device; | |
716 | else | |
717 | tmp_dev = copy->entry[j].device; | |
718 | ||
719 | if (!tmp_dev) | |
720 | continue; | |
721 | ||
722 | if (dasd_devmap_get_pprc_status(tmp_dev, &tmp_dat)) | |
723 | return 1; | |
724 | ||
725 | if (dasd_devmap_entry_from_pprc_data(tmp_dat, uid, entry->primary) < 0) { | |
726 | dev_warn(&tmp_dev->cdev->dev, | |
727 | "Copy pair relation does not contain device: %s\n", | |
728 | dev_name(&device->cdev->dev)); | |
729 | kfree(tmp_dat); | |
730 | return 1; | |
731 | } | |
732 | kfree(tmp_dat); | |
733 | } | |
734 | return 0; | |
735 | } | |
736 | ||
737 | /* delete device from copy relation entry */ | |
738 | static void dasd_devmap_delete_copy_relation_device(struct dasd_device *device) | |
739 | { | |
740 | struct dasd_copy_relation *copy; | |
741 | int i; | |
742 | ||
743 | if (!device->copy) | |
744 | return; | |
745 | ||
746 | copy = device->copy; | |
747 | for (i = 0; i < DASD_CP_ENTRIES; i++) { | |
748 | if (copy->entry[i].device == device) | |
749 | copy->entry[i].device = NULL; | |
750 | } | |
751 | dasd_put_device(device); | |
752 | device->copy = NULL; | |
753 | } | |
754 | ||
755 | /* | |
756 | * read all required information for a copy relation setup and setup the device | |
757 | * accordingly | |
758 | */ | |
759 | int dasd_devmap_set_device_copy_relation(struct ccw_device *cdev, | |
760 | bool pprc_enabled) | |
761 | { | |
762 | struct dasd_pprc_data_sc4 *data = NULL; | |
763 | struct dasd_copy_entry *entry = NULL; | |
764 | struct dasd_copy_relation *copy; | |
765 | struct dasd_devmap *devmap; | |
766 | struct dasd_device *device; | |
767 | int i, rc = 0; | |
768 | ||
769 | devmap = dasd_devmap_from_cdev(cdev); | |
770 | if (IS_ERR(devmap)) | |
771 | return PTR_ERR(devmap); | |
772 | ||
773 | device = devmap->device; | |
774 | if (!device) | |
775 | return -ENODEV; | |
776 | ||
777 | copy = devmap->copy; | |
778 | /* no copy pair setup for this device */ | |
779 | if (!copy) | |
780 | goto out; | |
781 | ||
782 | rc = dasd_devmap_get_pprc_status(device, &data); | |
783 | if (rc) | |
784 | return rc; | |
785 | ||
786 | /* print error if PPRC is requested but not enabled on storage server */ | |
787 | if (!pprc_enabled) { | |
788 | dev_err(&cdev->dev, "Copy relation not enabled on storage server\n"); | |
789 | rc = -EINVAL; | |
790 | goto out; | |
791 | } | |
792 | ||
793 | if (!data->dev_info[0].state) { | |
794 | dev_warn(&device->cdev->dev, "Copy pair setup requested for device not in copy relation\n"); | |
795 | rc = -EINVAL; | |
796 | goto out; | |
797 | } | |
798 | /* find entry */ | |
799 | for (i = 0; i < DASD_CP_ENTRIES; i++) { | |
800 | if (copy->entry[i].configured && | |
801 | strncmp(dev_name(&cdev->dev), | |
802 | copy->entry[i].busid, DASD_BUS_ID_SIZE) == 0) { | |
803 | entry = ©->entry[i]; | |
804 | break; | |
805 | } | |
806 | } | |
807 | if (!entry) { | |
808 | dev_warn(&device->cdev->dev, "Copy relation entry not found\n"); | |
809 | rc = -EINVAL; | |
810 | goto out; | |
811 | } | |
812 | /* check if the copy relation is valid */ | |
813 | if (dasd_devmap_check_copy_relation(device, entry, data, copy)) { | |
814 | dev_warn(&device->cdev->dev, "Copy relation faulty\n"); | |
815 | rc = -EINVAL; | |
816 | goto out; | |
817 | } | |
818 | ||
819 | dasd_get_device(device); | |
820 | copy->entry[i].device = device; | |
821 | device->copy = copy; | |
822 | out: | |
823 | kfree(data); | |
824 | return rc; | |
825 | } | |
826 | EXPORT_SYMBOL_GPL(dasd_devmap_set_device_copy_relation); | |
827 | ||
1da177e4 LT |
828 | /* |
829 | * Wait queue for dasd_delete_device waits. | |
830 | */ | |
831 | static DECLARE_WAIT_QUEUE_HEAD(dasd_delete_wq); | |
832 | ||
833 | /* | |
834 | * Remove a dasd device structure. The passed referenced | |
835 | * is destroyed. | |
836 | */ | |
837 | void | |
838 | dasd_delete_device(struct dasd_device *device) | |
839 | { | |
840 | struct ccw_device *cdev; | |
841 | struct dasd_devmap *devmap; | |
a00bfd71 | 842 | unsigned long flags; |
1da177e4 LT |
843 | |
844 | /* First remove device pointer from devmap. */ | |
2a0217d5 | 845 | devmap = dasd_find_busid(dev_name(&device->cdev->dev)); |
606f4422 | 846 | BUG_ON(IS_ERR(devmap)); |
1da177e4 LT |
847 | spin_lock(&dasd_devmap_lock); |
848 | if (devmap->device != device) { | |
849 | spin_unlock(&dasd_devmap_lock); | |
850 | dasd_put_device(device); | |
851 | return; | |
852 | } | |
853 | devmap->device = NULL; | |
854 | spin_unlock(&dasd_devmap_lock); | |
855 | ||
a00bfd71 MS |
856 | /* Disconnect dasd_device structure from ccw_device structure. */ |
857 | spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); | |
faf16aa9 | 858 | dev_set_drvdata(&device->cdev->dev, NULL); |
a00bfd71 MS |
859 | spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
860 | ||
a91ff09d SH |
861 | /* Removve copy relation */ |
862 | dasd_devmap_delete_copy_relation_device(device); | |
a00bfd71 MS |
863 | /* |
864 | * Drop ref_count by 3, one for the devmap reference, one for | |
865 | * the cdev reference and one for the passed reference. | |
866 | */ | |
867 | atomic_sub(3, &device->ref_count); | |
1da177e4 LT |
868 | |
869 | /* Wait for reference counter to drop to zero. */ | |
870 | wait_event(dasd_delete_wq, atomic_read(&device->ref_count) == 0); | |
871 | ||
c020d722 | 872 | dasd_generic_free_discipline(device); |
19508b20 JH |
873 | |
874 | kset_unregister(device->paths_info); | |
875 | ||
1da177e4 LT |
876 | /* Disconnect dasd_device structure from ccw_device structure. */ |
877 | cdev = device->cdev; | |
878 | device->cdev = NULL; | |
879 | ||
1da177e4 LT |
880 | /* Put ccw_device structure. */ |
881 | put_device(&cdev->dev); | |
882 | ||
883 | /* Now the device structure can be freed. */ | |
884 | dasd_free_device(device); | |
885 | } | |
886 | ||
887 | /* | |
888 | * Reference counter dropped to zero. Wake up waiter | |
889 | * in dasd_delete_device. | |
890 | */ | |
891 | void | |
892 | dasd_put_device_wake(struct dasd_device *device) | |
893 | { | |
894 | wake_up(&dasd_delete_wq); | |
895 | } | |
a4d26c6a | 896 | EXPORT_SYMBOL_GPL(dasd_put_device_wake); |
1da177e4 | 897 | |
a00bfd71 MS |
898 | /* |
899 | * Return dasd_device structure associated with cdev. | |
900 | * This function needs to be called with the ccw device | |
901 | * lock held. It can be used from interrupt context. | |
902 | */ | |
903 | struct dasd_device * | |
904 | dasd_device_from_cdev_locked(struct ccw_device *cdev) | |
905 | { | |
faf16aa9 | 906 | struct dasd_device *device = dev_get_drvdata(&cdev->dev); |
a00bfd71 MS |
907 | |
908 | if (!device) | |
909 | return ERR_PTR(-ENODEV); | |
910 | dasd_get_device(device); | |
911 | return device; | |
912 | } | |
913 | ||
1da177e4 LT |
914 | /* |
915 | * Return dasd_device structure associated with cdev. | |
916 | */ | |
917 | struct dasd_device * | |
918 | dasd_device_from_cdev(struct ccw_device *cdev) | |
919 | { | |
1da177e4 | 920 | struct dasd_device *device; |
a00bfd71 | 921 | unsigned long flags; |
1da177e4 | 922 | |
a00bfd71 MS |
923 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); |
924 | device = dasd_device_from_cdev_locked(cdev); | |
925 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); | |
1da177e4 LT |
926 | return device; |
927 | } | |
928 | ||
65f8da47 SW |
929 | void dasd_add_link_to_gendisk(struct gendisk *gdp, struct dasd_device *device) |
930 | { | |
931 | struct dasd_devmap *devmap; | |
932 | ||
933 | devmap = dasd_find_busid(dev_name(&device->cdev->dev)); | |
934 | if (IS_ERR(devmap)) | |
935 | return; | |
936 | spin_lock(&dasd_devmap_lock); | |
937 | gdp->private_data = devmap; | |
938 | spin_unlock(&dasd_devmap_lock); | |
939 | } | |
413862ca | 940 | EXPORT_SYMBOL(dasd_add_link_to_gendisk); |
65f8da47 SW |
941 | |
942 | struct dasd_device *dasd_device_from_gendisk(struct gendisk *gdp) | |
943 | { | |
944 | struct dasd_device *device; | |
945 | struct dasd_devmap *devmap; | |
946 | ||
947 | if (!gdp->private_data) | |
948 | return NULL; | |
949 | device = NULL; | |
950 | spin_lock(&dasd_devmap_lock); | |
951 | devmap = gdp->private_data; | |
952 | if (devmap && devmap->device) { | |
953 | device = devmap->device; | |
954 | dasd_get_device(device); | |
955 | } | |
956 | spin_unlock(&dasd_devmap_lock); | |
957 | return device; | |
958 | } | |
959 | ||
1da177e4 LT |
960 | /* |
961 | * SECTION: files in sysfs | |
962 | */ | |
963 | ||
13de227b HS |
964 | /* |
965 | * failfast controls the behaviour, if no path is available | |
966 | */ | |
967 | static ssize_t dasd_ff_show(struct device *dev, struct device_attribute *attr, | |
968 | char *buf) | |
969 | { | |
970 | struct dasd_devmap *devmap; | |
971 | int ff_flag; | |
972 | ||
ca0b4b7d | 973 | devmap = dasd_find_busid(dev_name(dev)); |
13de227b HS |
974 | if (!IS_ERR(devmap)) |
975 | ff_flag = (devmap->features & DASD_FEATURE_FAILFAST) != 0; | |
976 | else | |
977 | ff_flag = (DASD_FEATURE_DEFAULT & DASD_FEATURE_FAILFAST) != 0; | |
4b9e0436 | 978 | return sysfs_emit(buf, ff_flag ? "1\n" : "0\n"); |
13de227b HS |
979 | } |
980 | ||
981 | static ssize_t dasd_ff_store(struct device *dev, struct device_attribute *attr, | |
982 | const char *buf, size_t count) | |
983 | { | |
ce7a788f | 984 | unsigned int val; |
1081f3a7 | 985 | int rc; |
13de227b | 986 | |
ce7a788f | 987 | if (kstrtouint(buf, 0, &val) || val > 1) |
13de227b HS |
988 | return -EINVAL; |
989 | ||
1081f3a7 JH |
990 | rc = dasd_set_feature(to_ccwdev(dev), DASD_FEATURE_FAILFAST, val); |
991 | ||
992 | return rc ? : count; | |
13de227b HS |
993 | } |
994 | ||
995 | static DEVICE_ATTR(failfast, 0644, dasd_ff_show, dasd_ff_store); | |
996 | ||
1da177e4 LT |
997 | /* |
998 | * readonly controls the readonly status of a dasd | |
999 | */ | |
1000 | static ssize_t | |
e404e274 | 1001 | dasd_ro_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1002 | { |
1003 | struct dasd_devmap *devmap; | |
b487a914 JH |
1004 | struct dasd_device *device; |
1005 | int ro_flag = 0; | |
1da177e4 | 1006 | |
2a0217d5 | 1007 | devmap = dasd_find_busid(dev_name(dev)); |
b487a914 JH |
1008 | if (IS_ERR(devmap)) |
1009 | goto out; | |
1010 | ||
1011 | ro_flag = !!(devmap->features & DASD_FEATURE_READONLY); | |
1012 | ||
1013 | spin_lock(&dasd_devmap_lock); | |
1014 | device = devmap->device; | |
1015 | if (device) | |
1016 | ro_flag |= test_bit(DASD_FLAG_DEVICE_RO, &device->flags); | |
1017 | spin_unlock(&dasd_devmap_lock); | |
1018 | ||
1019 | out: | |
4b9e0436 | 1020 | return sysfs_emit(buf, ro_flag ? "1\n" : "0\n"); |
1da177e4 LT |
1021 | } |
1022 | ||
1023 | static ssize_t | |
138c014d HH |
1024 | dasd_ro_store(struct device *dev, struct device_attribute *attr, |
1025 | const char *buf, size_t count) | |
1da177e4 | 1026 | { |
1081f3a7 | 1027 | struct ccw_device *cdev = to_ccwdev(dev); |
33b62a30 | 1028 | struct dasd_device *device; |
9f9d53e5 | 1029 | unsigned long flags; |
ce7a788f | 1030 | unsigned int val; |
1081f3a7 | 1031 | int rc; |
01376f44 | 1032 | |
ce7a788f | 1033 | if (kstrtouint(buf, 0, &val) || val > 1) |
01376f44 HH |
1034 | return -EINVAL; |
1035 | ||
1081f3a7 JH |
1036 | rc = dasd_set_feature(cdev, DASD_FEATURE_READONLY, val); |
1037 | if (rc) | |
1038 | return rc; | |
1039 | ||
1040 | device = dasd_device_from_cdev(cdev); | |
1041 | if (IS_ERR(device)) | |
795c9a51 | 1042 | return count; |
1081f3a7 | 1043 | |
9f9d53e5 | 1044 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); |
1081f3a7 | 1045 | val = val || test_bit(DASD_FLAG_DEVICE_RO, &device->flags); |
1081f3a7 | 1046 | |
9f9d53e5 JH |
1047 | if (!device->block || !device->block->gdp || |
1048 | test_bit(DASD_FLAG_OFFLINE, &device->flags)) { | |
1049 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); | |
1050 | goto out; | |
1051 | } | |
1052 | /* Increase open_count to avoid losing the block device */ | |
1053 | atomic_inc(&device->block->open_count); | |
1054 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); | |
1055 | ||
1056 | set_disk_ro(device->block->gdp, val); | |
1057 | atomic_dec(&device->block->open_count); | |
1058 | ||
1059 | out: | |
1081f3a7 JH |
1060 | dasd_put_device(device); |
1061 | ||
1da177e4 LT |
1062 | return count; |
1063 | } | |
1064 | ||
1065 | static DEVICE_ATTR(readonly, 0644, dasd_ro_show, dasd_ro_store); | |
9575bf26 HH |
1066 | /* |
1067 | * erplog controls the logging of ERP related data | |
1068 | * (e.g. failing channel programs). | |
1069 | */ | |
1070 | static ssize_t | |
1071 | dasd_erplog_show(struct device *dev, struct device_attribute *attr, char *buf) | |
1072 | { | |
1073 | struct dasd_devmap *devmap; | |
1074 | int erplog; | |
1075 | ||
2a0217d5 | 1076 | devmap = dasd_find_busid(dev_name(dev)); |
9575bf26 HH |
1077 | if (!IS_ERR(devmap)) |
1078 | erplog = (devmap->features & DASD_FEATURE_ERPLOG) != 0; | |
1079 | else | |
1080 | erplog = (DASD_FEATURE_DEFAULT & DASD_FEATURE_ERPLOG) != 0; | |
4b9e0436 | 1081 | return sysfs_emit(buf, erplog ? "1\n" : "0\n"); |
9575bf26 HH |
1082 | } |
1083 | ||
1084 | static ssize_t | |
1085 | dasd_erplog_store(struct device *dev, struct device_attribute *attr, | |
1086 | const char *buf, size_t count) | |
1087 | { | |
ce7a788f | 1088 | unsigned int val; |
1081f3a7 | 1089 | int rc; |
9575bf26 | 1090 | |
ce7a788f | 1091 | if (kstrtouint(buf, 0, &val) || val > 1) |
9575bf26 HH |
1092 | return -EINVAL; |
1093 | ||
1081f3a7 JH |
1094 | rc = dasd_set_feature(to_ccwdev(dev), DASD_FEATURE_ERPLOG, val); |
1095 | ||
1096 | return rc ? : count; | |
9575bf26 HH |
1097 | } |
1098 | ||
1099 | static DEVICE_ATTR(erplog, 0644, dasd_erplog_show, dasd_erplog_store); | |
1da177e4 LT |
1100 | |
1101 | /* | |
1102 | * use_diag controls whether the driver should use diag rather than ssch | |
1103 | * to talk to the device | |
1104 | */ | |
138c014d | 1105 | static ssize_t |
e404e274 | 1106 | dasd_use_diag_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1107 | { |
1108 | struct dasd_devmap *devmap; | |
1109 | int use_diag; | |
1110 | ||
2a0217d5 | 1111 | devmap = dasd_find_busid(dev_name(dev)); |
1da177e4 LT |
1112 | if (!IS_ERR(devmap)) |
1113 | use_diag = (devmap->features & DASD_FEATURE_USEDIAG) != 0; | |
1114 | else | |
1115 | use_diag = (DASD_FEATURE_DEFAULT & DASD_FEATURE_USEDIAG) != 0; | |
1116 | return sprintf(buf, use_diag ? "1\n" : "0\n"); | |
1117 | } | |
1118 | ||
1119 | static ssize_t | |
138c014d HH |
1120 | dasd_use_diag_store(struct device *dev, struct device_attribute *attr, |
1121 | const char *buf, size_t count) | |
1da177e4 LT |
1122 | { |
1123 | struct dasd_devmap *devmap; | |
ce7a788f | 1124 | unsigned int val; |
1da177e4 | 1125 | ssize_t rc; |
1da177e4 LT |
1126 | |
1127 | devmap = dasd_devmap_from_cdev(to_ccwdev(dev)); | |
1128 | if (IS_ERR(devmap)) | |
1129 | return PTR_ERR(devmap); | |
01376f44 | 1130 | |
ce7a788f | 1131 | if (kstrtouint(buf, 0, &val) || val > 1) |
01376f44 HH |
1132 | return -EINVAL; |
1133 | ||
1da177e4 LT |
1134 | spin_lock(&dasd_devmap_lock); |
1135 | /* Changing diag discipline flag is only allowed in offline state. */ | |
1136 | rc = count; | |
e4dbb0f2 | 1137 | if (!devmap->device && !(devmap->features & DASD_FEATURE_USERAW)) { |
01376f44 | 1138 | if (val) |
1da177e4 LT |
1139 | devmap->features |= DASD_FEATURE_USEDIAG; |
1140 | else | |
1141 | devmap->features &= ~DASD_FEATURE_USEDIAG; | |
1142 | } else | |
1143 | rc = -EPERM; | |
1144 | spin_unlock(&dasd_devmap_lock); | |
1145 | return rc; | |
1146 | } | |
1147 | ||
138c014d | 1148 | static DEVICE_ATTR(use_diag, 0644, dasd_use_diag_show, dasd_use_diag_store); |
1da177e4 | 1149 | |
e4dbb0f2 SH |
1150 | /* |
1151 | * use_raw controls whether the driver should give access to raw eckd data or | |
1152 | * operate in standard mode | |
1153 | */ | |
1154 | static ssize_t | |
1155 | dasd_use_raw_show(struct device *dev, struct device_attribute *attr, char *buf) | |
1156 | { | |
1157 | struct dasd_devmap *devmap; | |
1158 | int use_raw; | |
1159 | ||
1160 | devmap = dasd_find_busid(dev_name(dev)); | |
1161 | if (!IS_ERR(devmap)) | |
1162 | use_raw = (devmap->features & DASD_FEATURE_USERAW) != 0; | |
1163 | else | |
1164 | use_raw = (DASD_FEATURE_DEFAULT & DASD_FEATURE_USERAW) != 0; | |
1165 | return sprintf(buf, use_raw ? "1\n" : "0\n"); | |
1166 | } | |
1167 | ||
1168 | static ssize_t | |
1169 | dasd_use_raw_store(struct device *dev, struct device_attribute *attr, | |
1170 | const char *buf, size_t count) | |
1171 | { | |
1172 | struct dasd_devmap *devmap; | |
1173 | ssize_t rc; | |
1174 | unsigned long val; | |
1175 | ||
1176 | devmap = dasd_devmap_from_cdev(to_ccwdev(dev)); | |
1177 | if (IS_ERR(devmap)) | |
1178 | return PTR_ERR(devmap); | |
1179 | ||
0178722b | 1180 | if ((kstrtoul(buf, 10, &val) != 0) || val > 1) |
e4dbb0f2 SH |
1181 | return -EINVAL; |
1182 | ||
1183 | spin_lock(&dasd_devmap_lock); | |
1184 | /* Changing diag discipline flag is only allowed in offline state. */ | |
1185 | rc = count; | |
1186 | if (!devmap->device && !(devmap->features & DASD_FEATURE_USEDIAG)) { | |
1187 | if (val) | |
1188 | devmap->features |= DASD_FEATURE_USERAW; | |
1189 | else | |
1190 | devmap->features &= ~DASD_FEATURE_USERAW; | |
1191 | } else | |
1192 | rc = -EPERM; | |
1193 | spin_unlock(&dasd_devmap_lock); | |
1194 | return rc; | |
1195 | } | |
1196 | ||
1197 | static DEVICE_ATTR(raw_track_access, 0644, dasd_use_raw_show, | |
1198 | dasd_use_raw_store); | |
1199 | ||
d07dc5d8 SH |
1200 | static ssize_t |
1201 | dasd_safe_offline_store(struct device *dev, struct device_attribute *attr, | |
1202 | const char *buf, size_t count) | |
1203 | { | |
1204 | struct ccw_device *cdev = to_ccwdev(dev); | |
1205 | struct dasd_device *device; | |
2757fe1d | 1206 | unsigned long flags; |
d07dc5d8 SH |
1207 | int rc; |
1208 | ||
2757fe1d SH |
1209 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); |
1210 | device = dasd_device_from_cdev_locked(cdev); | |
d07dc5d8 SH |
1211 | if (IS_ERR(device)) { |
1212 | rc = PTR_ERR(device); | |
2757fe1d | 1213 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); |
d07dc5d8 SH |
1214 | goto out; |
1215 | } | |
1216 | ||
1217 | if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || | |
1218 | test_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags)) { | |
1219 | /* Already doing offline processing */ | |
1220 | dasd_put_device(device); | |
2757fe1d | 1221 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); |
d07dc5d8 SH |
1222 | rc = -EBUSY; |
1223 | goto out; | |
1224 | } | |
1225 | ||
1226 | set_bit(DASD_FLAG_SAFE_OFFLINE, &device->flags); | |
1227 | dasd_put_device(device); | |
2757fe1d | 1228 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); |
d07dc5d8 SH |
1229 | |
1230 | rc = ccw_device_set_offline(cdev); | |
1231 | ||
1232 | out: | |
1233 | return rc ? rc : count; | |
1234 | } | |
1235 | ||
1236 | static DEVICE_ATTR(safe_offline, 0200, NULL, dasd_safe_offline_store); | |
1237 | ||
5a3b7b11 SH |
1238 | static ssize_t |
1239 | dasd_access_show(struct device *dev, struct device_attribute *attr, | |
1240 | char *buf) | |
1241 | { | |
1242 | struct ccw_device *cdev = to_ccwdev(dev); | |
1243 | struct dasd_device *device; | |
1244 | int count; | |
1245 | ||
1246 | device = dasd_device_from_cdev(cdev); | |
1247 | if (IS_ERR(device)) | |
1248 | return PTR_ERR(device); | |
1249 | ||
a521b048 SH |
1250 | if (!device->discipline) |
1251 | count = -ENODEV; | |
1252 | else if (!device->discipline->host_access_count) | |
5a3b7b11 | 1253 | count = -EOPNOTSUPP; |
a521b048 SH |
1254 | else |
1255 | count = device->discipline->host_access_count(device); | |
5a3b7b11 SH |
1256 | |
1257 | dasd_put_device(device); | |
1258 | if (count < 0) | |
1259 | return count; | |
1260 | ||
1261 | return sprintf(buf, "%d\n", count); | |
1262 | } | |
1263 | ||
1264 | static DEVICE_ATTR(host_access_count, 0444, dasd_access_show, NULL); | |
1265 | ||
1da177e4 | 1266 | static ssize_t |
138c014d HH |
1267 | dasd_discipline_show(struct device *dev, struct device_attribute *attr, |
1268 | char *buf) | |
1da177e4 | 1269 | { |
a00bfd71 MS |
1270 | struct dasd_device *device; |
1271 | ssize_t len; | |
1da177e4 | 1272 | |
a00bfd71 | 1273 | device = dasd_device_from_cdev(to_ccwdev(dev)); |
589c74d5 SH |
1274 | if (IS_ERR(device)) |
1275 | goto out; | |
1276 | else if (!device->discipline) { | |
1277 | dasd_put_device(device); | |
1278 | goto out; | |
1279 | } else { | |
4b9e0436 QW |
1280 | len = sysfs_emit(buf, "%s\n", |
1281 | device->discipline->name); | |
a00bfd71 | 1282 | dasd_put_device(device); |
589c74d5 SH |
1283 | return len; |
1284 | } | |
1285 | out: | |
4b9e0436 | 1286 | len = sysfs_emit(buf, "none\n"); |
a00bfd71 | 1287 | return len; |
1da177e4 LT |
1288 | } |
1289 | ||
1290 | static DEVICE_ATTR(discipline, 0444, dasd_discipline_show, NULL); | |
1291 | ||
4dfd5c45 HH |
1292 | static ssize_t |
1293 | dasd_device_status_show(struct device *dev, struct device_attribute *attr, | |
1294 | char *buf) | |
1295 | { | |
1296 | struct dasd_device *device; | |
1297 | ssize_t len; | |
1298 | ||
1299 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1300 | if (!IS_ERR(device)) { | |
1301 | switch (device->state) { | |
1302 | case DASD_STATE_NEW: | |
4b9e0436 | 1303 | len = sysfs_emit(buf, "new\n"); |
4dfd5c45 HH |
1304 | break; |
1305 | case DASD_STATE_KNOWN: | |
4b9e0436 | 1306 | len = sysfs_emit(buf, "detected\n"); |
4dfd5c45 HH |
1307 | break; |
1308 | case DASD_STATE_BASIC: | |
4b9e0436 | 1309 | len = sysfs_emit(buf, "basic\n"); |
4dfd5c45 HH |
1310 | break; |
1311 | case DASD_STATE_UNFMT: | |
4b9e0436 | 1312 | len = sysfs_emit(buf, "unformatted\n"); |
4dfd5c45 HH |
1313 | break; |
1314 | case DASD_STATE_READY: | |
4b9e0436 | 1315 | len = sysfs_emit(buf, "ready\n"); |
4dfd5c45 HH |
1316 | break; |
1317 | case DASD_STATE_ONLINE: | |
4b9e0436 | 1318 | len = sysfs_emit(buf, "online\n"); |
4dfd5c45 HH |
1319 | break; |
1320 | default: | |
4b9e0436 | 1321 | len = sysfs_emit(buf, "no stat\n"); |
4dfd5c45 HH |
1322 | break; |
1323 | } | |
1324 | dasd_put_device(device); | |
1325 | } else | |
4b9e0436 | 1326 | len = sysfs_emit(buf, "unknown\n"); |
4dfd5c45 HH |
1327 | return len; |
1328 | } | |
1329 | ||
1330 | static DEVICE_ATTR(status, 0444, dasd_device_status_show, NULL); | |
1331 | ||
2dedf0d9 SH |
1332 | static ssize_t dasd_alias_show(struct device *dev, |
1333 | struct device_attribute *attr, char *buf) | |
3d052595 | 1334 | { |
2dedf0d9 SH |
1335 | struct dasd_device *device; |
1336 | struct dasd_uid uid; | |
3d052595 | 1337 | |
2dedf0d9 SH |
1338 | device = dasd_device_from_cdev(to_ccwdev(dev)); |
1339 | if (IS_ERR(device)) | |
8e09f215 | 1340 | return sprintf(buf, "0\n"); |
2dedf0d9 SH |
1341 | |
1342 | if (device->discipline && device->discipline->get_uid && | |
1343 | !device->discipline->get_uid(device, &uid)) { | |
1344 | if (uid.type == UA_BASE_PAV_ALIAS || | |
0abccf77 SH |
1345 | uid.type == UA_HYPER_PAV_ALIAS) { |
1346 | dasd_put_device(device); | |
2dedf0d9 | 1347 | return sprintf(buf, "1\n"); |
0abccf77 | 1348 | } |
8e09f215 | 1349 | } |
2dedf0d9 SH |
1350 | dasd_put_device(device); |
1351 | ||
1352 | return sprintf(buf, "0\n"); | |
3d052595 HH |
1353 | } |
1354 | ||
1355 | static DEVICE_ATTR(alias, 0444, dasd_alias_show, NULL); | |
1356 | ||
2dedf0d9 SH |
1357 | static ssize_t dasd_vendor_show(struct device *dev, |
1358 | struct device_attribute *attr, char *buf) | |
3d052595 | 1359 | { |
2dedf0d9 SH |
1360 | struct dasd_device *device; |
1361 | struct dasd_uid uid; | |
3d052595 HH |
1362 | char *vendor; |
1363 | ||
2dedf0d9 SH |
1364 | device = dasd_device_from_cdev(to_ccwdev(dev)); |
1365 | vendor = ""; | |
1366 | if (IS_ERR(device)) | |
4b9e0436 | 1367 | return sysfs_emit(buf, "%s\n", vendor); |
2dedf0d9 SH |
1368 | |
1369 | if (device->discipline && device->discipline->get_uid && | |
1370 | !device->discipline->get_uid(device, &uid)) | |
1371 | vendor = uid.vendor; | |
1372 | ||
1373 | dasd_put_device(device); | |
3d052595 | 1374 | |
4b9e0436 | 1375 | return sysfs_emit(buf, "%s\n", vendor); |
3d052595 HH |
1376 | } |
1377 | ||
1378 | static DEVICE_ATTR(vendor, 0444, dasd_vendor_show, NULL); | |
1379 | ||
1380 | #define UID_STRLEN ( /* vendor */ 3 + 1 + /* serial */ 14 + 1 +\ | |
4abb08c2 SW |
1381 | /* SSID */ 4 + 1 + /* unit addr */ 2 + 1 +\ |
1382 | /* vduit */ 32 + 1) | |
3d052595 HH |
1383 | |
1384 | static ssize_t | |
1385 | dasd_uid_show(struct device *dev, struct device_attribute *attr, char *buf) | |
1386 | { | |
2dedf0d9 SH |
1387 | struct dasd_device *device; |
1388 | struct dasd_uid uid; | |
8e09f215 SW |
1389 | char uid_string[UID_STRLEN]; |
1390 | char ua_string[3]; | |
3d052595 | 1391 | |
2dedf0d9 SH |
1392 | device = dasd_device_from_cdev(to_ccwdev(dev)); |
1393 | uid_string[0] = 0; | |
1394 | if (IS_ERR(device)) | |
4b9e0436 | 1395 | return sysfs_emit(buf, "%s\n", uid_string); |
2dedf0d9 SH |
1396 | |
1397 | if (device->discipline && device->discipline->get_uid && | |
1398 | !device->discipline->get_uid(device, &uid)) { | |
1399 | switch (uid.type) { | |
1400 | case UA_BASE_DEVICE: | |
1401 | snprintf(ua_string, sizeof(ua_string), "%02x", | |
1402 | uid.real_unit_addr); | |
1403 | break; | |
1404 | case UA_BASE_PAV_ALIAS: | |
1405 | snprintf(ua_string, sizeof(ua_string), "%02x", | |
1406 | uid.base_unit_addr); | |
1407 | break; | |
1408 | case UA_HYPER_PAV_ALIAS: | |
1409 | snprintf(ua_string, sizeof(ua_string), "xx"); | |
1410 | break; | |
1411 | default: | |
1412 | /* should not happen, treat like base device */ | |
1413 | snprintf(ua_string, sizeof(ua_string), "%02x", | |
1414 | uid.real_unit_addr); | |
1415 | break; | |
1416 | } | |
1417 | ||
1418 | if (strlen(uid.vduit) > 0) | |
1419 | snprintf(uid_string, sizeof(uid_string), | |
1420 | "%s.%s.%04x.%s.%s", | |
1421 | uid.vendor, uid.serial, uid.ssid, ua_string, | |
1422 | uid.vduit); | |
1423 | else | |
1424 | snprintf(uid_string, sizeof(uid_string), | |
1425 | "%s.%s.%04x.%s", | |
1426 | uid.vendor, uid.serial, uid.ssid, ua_string); | |
8e09f215 | 1427 | } |
2dedf0d9 SH |
1428 | dasd_put_device(device); |
1429 | ||
4b9e0436 | 1430 | return sysfs_emit(buf, "%s\n", uid_string); |
3d052595 | 1431 | } |
3d052595 HH |
1432 | static DEVICE_ATTR(uid, 0444, dasd_uid_show, NULL); |
1433 | ||
20c64468 SW |
1434 | /* |
1435 | * extended error-reporting | |
1436 | */ | |
1437 | static ssize_t | |
1438 | dasd_eer_show(struct device *dev, struct device_attribute *attr, char *buf) | |
1439 | { | |
1440 | struct dasd_devmap *devmap; | |
1441 | int eer_flag; | |
1442 | ||
2a0217d5 | 1443 | devmap = dasd_find_busid(dev_name(dev)); |
20c64468 SW |
1444 | if (!IS_ERR(devmap) && devmap->device) |
1445 | eer_flag = dasd_eer_enabled(devmap->device); | |
1446 | else | |
1447 | eer_flag = 0; | |
4b9e0436 | 1448 | return sysfs_emit(buf, eer_flag ? "1\n" : "0\n"); |
20c64468 SW |
1449 | } |
1450 | ||
1451 | static ssize_t | |
1452 | dasd_eer_store(struct device *dev, struct device_attribute *attr, | |
1453 | const char *buf, size_t count) | |
1454 | { | |
9de67725 | 1455 | struct dasd_device *device; |
ce7a788f | 1456 | unsigned int val; |
9de67725 | 1457 | int rc = 0; |
20c64468 | 1458 | |
9de67725 JH |
1459 | device = dasd_device_from_cdev(to_ccwdev(dev)); |
1460 | if (IS_ERR(device)) | |
1461 | return PTR_ERR(device); | |
01376f44 | 1462 | |
ce7a788f | 1463 | if (kstrtouint(buf, 0, &val) || val > 1) |
01376f44 HH |
1464 | return -EINVAL; |
1465 | ||
9de67725 JH |
1466 | if (val) |
1467 | rc = dasd_eer_enable(device); | |
1468 | else | |
1469 | dasd_eer_disable(device); | |
1470 | ||
1471 | dasd_put_device(device); | |
1472 | ||
1473 | return rc ? : count; | |
20c64468 SW |
1474 | } |
1475 | ||
1476 | static DEVICE_ATTR(eer_enabled, 0644, dasd_eer_show, dasd_eer_store); | |
1477 | ||
7c8faa86 SH |
1478 | /* |
1479 | * expiration time for default requests | |
1480 | */ | |
1481 | static ssize_t | |
1482 | dasd_expires_show(struct device *dev, struct device_attribute *attr, char *buf) | |
1483 | { | |
1484 | struct dasd_device *device; | |
1485 | int len; | |
1486 | ||
1487 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1488 | if (IS_ERR(device)) | |
1489 | return -ENODEV; | |
4b9e0436 | 1490 | len = sysfs_emit(buf, "%lu\n", device->default_expires); |
7c8faa86 SH |
1491 | dasd_put_device(device); |
1492 | return len; | |
1493 | } | |
1494 | ||
1495 | static ssize_t | |
1496 | dasd_expires_store(struct device *dev, struct device_attribute *attr, | |
1497 | const char *buf, size_t count) | |
1498 | { | |
1499 | struct dasd_device *device; | |
1500 | unsigned long val; | |
1501 | ||
1502 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1503 | if (IS_ERR(device)) | |
1504 | return -ENODEV; | |
1505 | ||
0178722b | 1506 | if ((kstrtoul(buf, 10, &val) != 0) || |
7c8faa86 SH |
1507 | (val > DASD_EXPIRES_MAX) || val == 0) { |
1508 | dasd_put_device(device); | |
1509 | return -EINVAL; | |
1510 | } | |
1511 | ||
1512 | if (val) | |
1513 | device->default_expires = val; | |
1514 | ||
1515 | dasd_put_device(device); | |
1516 | return count; | |
1517 | } | |
1518 | ||
1519 | static DEVICE_ATTR(expires, 0644, dasd_expires_show, dasd_expires_store); | |
1520 | ||
1f1ee9ad HR |
1521 | static ssize_t |
1522 | dasd_retries_show(struct device *dev, struct device_attribute *attr, char *buf) | |
1523 | { | |
1524 | struct dasd_device *device; | |
1525 | int len; | |
1526 | ||
1527 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1528 | if (IS_ERR(device)) | |
1529 | return -ENODEV; | |
4b9e0436 | 1530 | len = sysfs_emit(buf, "%lu\n", device->default_retries); |
1f1ee9ad HR |
1531 | dasd_put_device(device); |
1532 | return len; | |
1533 | } | |
1534 | ||
1535 | static ssize_t | |
1536 | dasd_retries_store(struct device *dev, struct device_attribute *attr, | |
1537 | const char *buf, size_t count) | |
1538 | { | |
1539 | struct dasd_device *device; | |
1540 | unsigned long val; | |
1541 | ||
1542 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1543 | if (IS_ERR(device)) | |
1544 | return -ENODEV; | |
1545 | ||
0178722b | 1546 | if ((kstrtoul(buf, 10, &val) != 0) || |
1f1ee9ad HR |
1547 | (val > DASD_RETRIES_MAX)) { |
1548 | dasd_put_device(device); | |
1549 | return -EINVAL; | |
1550 | } | |
1551 | ||
1552 | if (val) | |
1553 | device->default_retries = val; | |
1554 | ||
1555 | dasd_put_device(device); | |
1556 | return count; | |
1557 | } | |
1558 | ||
1559 | static DEVICE_ATTR(retries, 0644, dasd_retries_show, dasd_retries_store); | |
1560 | ||
3d71ad32 HR |
1561 | static ssize_t |
1562 | dasd_timeout_show(struct device *dev, struct device_attribute *attr, | |
1563 | char *buf) | |
1564 | { | |
1565 | struct dasd_device *device; | |
1566 | int len; | |
1567 | ||
1568 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1569 | if (IS_ERR(device)) | |
1570 | return -ENODEV; | |
4b9e0436 | 1571 | len = sysfs_emit(buf, "%lu\n", device->blk_timeout); |
3d71ad32 HR |
1572 | dasd_put_device(device); |
1573 | return len; | |
1574 | } | |
1575 | ||
1576 | static ssize_t | |
1577 | dasd_timeout_store(struct device *dev, struct device_attribute *attr, | |
1578 | const char *buf, size_t count) | |
1579 | { | |
1580 | struct dasd_device *device; | |
1581 | struct request_queue *q; | |
e443343e | 1582 | unsigned long val; |
3d71ad32 HR |
1583 | |
1584 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1585 | if (IS_ERR(device) || !device->block) | |
1586 | return -ENODEV; | |
1587 | ||
0178722b | 1588 | if ((kstrtoul(buf, 10, &val) != 0) || |
3d71ad32 HR |
1589 | val > UINT_MAX / HZ) { |
1590 | dasd_put_device(device); | |
1591 | return -EINVAL; | |
1592 | } | |
1593 | q = device->block->request_queue; | |
1594 | if (!q) { | |
1595 | dasd_put_device(device); | |
1596 | return -ENODEV; | |
1597 | } | |
3d71ad32 HR |
1598 | |
1599 | device->blk_timeout = val; | |
1600 | ||
1601 | blk_queue_rq_timeout(q, device->blk_timeout * HZ); | |
3d71ad32 HR |
1602 | |
1603 | dasd_put_device(device); | |
1604 | return count; | |
1605 | } | |
1606 | ||
1607 | static DEVICE_ATTR(timeout, 0644, | |
1608 | dasd_timeout_show, dasd_timeout_store); | |
1609 | ||
a521b048 SH |
1610 | |
1611 | static ssize_t | |
1612 | dasd_path_reset_store(struct device *dev, struct device_attribute *attr, | |
1613 | const char *buf, size_t count) | |
1614 | { | |
1615 | struct dasd_device *device; | |
1616 | unsigned int val; | |
1617 | ||
1618 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1619 | if (IS_ERR(device)) | |
1620 | return -ENODEV; | |
1621 | ||
1622 | if ((kstrtouint(buf, 16, &val) != 0) || val > 0xff) | |
1623 | val = 0; | |
1624 | ||
1625 | if (device->discipline && device->discipline->reset_path) | |
1626 | device->discipline->reset_path(device, (__u8) val); | |
1627 | ||
1628 | dasd_put_device(device); | |
1629 | return count; | |
1630 | } | |
1631 | ||
1632 | static DEVICE_ATTR(path_reset, 0200, NULL, dasd_path_reset_store); | |
1633 | ||
1634 | static ssize_t dasd_hpf_show(struct device *dev, struct device_attribute *attr, | |
1635 | char *buf) | |
1636 | { | |
1637 | struct dasd_device *device; | |
1638 | int hpf; | |
1639 | ||
1640 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1641 | if (IS_ERR(device)) | |
1642 | return -ENODEV; | |
1643 | if (!device->discipline || !device->discipline->hpf_enabled) { | |
1644 | dasd_put_device(device); | |
4b9e0436 | 1645 | return sysfs_emit(buf, "%d\n", dasd_nofcx); |
a521b048 SH |
1646 | } |
1647 | hpf = device->discipline->hpf_enabled(device); | |
1648 | dasd_put_device(device); | |
4b9e0436 | 1649 | return sysfs_emit(buf, "%d\n", hpf); |
a521b048 SH |
1650 | } |
1651 | ||
1652 | static DEVICE_ATTR(hpf, 0444, dasd_hpf_show, NULL); | |
1653 | ||
5a27e60d SW |
1654 | static ssize_t dasd_reservation_policy_show(struct device *dev, |
1655 | struct device_attribute *attr, | |
1656 | char *buf) | |
1657 | { | |
1658 | struct dasd_devmap *devmap; | |
1659 | int rc = 0; | |
1660 | ||
1661 | devmap = dasd_find_busid(dev_name(dev)); | |
1662 | if (IS_ERR(devmap)) { | |
4b9e0436 | 1663 | rc = sysfs_emit(buf, "ignore\n"); |
5a27e60d SW |
1664 | } else { |
1665 | spin_lock(&dasd_devmap_lock); | |
1666 | if (devmap->features & DASD_FEATURE_FAILONSLCK) | |
4b9e0436 | 1667 | rc = sysfs_emit(buf, "fail\n"); |
5a27e60d | 1668 | else |
4b9e0436 | 1669 | rc = sysfs_emit(buf, "ignore\n"); |
5a27e60d SW |
1670 | spin_unlock(&dasd_devmap_lock); |
1671 | } | |
1672 | return rc; | |
1673 | } | |
1674 | ||
1675 | static ssize_t dasd_reservation_policy_store(struct device *dev, | |
1676 | struct device_attribute *attr, | |
1677 | const char *buf, size_t count) | |
1678 | { | |
1081f3a7 | 1679 | struct ccw_device *cdev = to_ccwdev(dev); |
5a27e60d SW |
1680 | int rc; |
1681 | ||
5a27e60d | 1682 | if (sysfs_streq("ignore", buf)) |
1081f3a7 | 1683 | rc = dasd_set_feature(cdev, DASD_FEATURE_FAILONSLCK, 0); |
5a27e60d | 1684 | else if (sysfs_streq("fail", buf)) |
1081f3a7 | 1685 | rc = dasd_set_feature(cdev, DASD_FEATURE_FAILONSLCK, 1); |
5a27e60d SW |
1686 | else |
1687 | rc = -EINVAL; | |
1081f3a7 JH |
1688 | |
1689 | return rc ? : count; | |
5a27e60d SW |
1690 | } |
1691 | ||
1692 | static DEVICE_ATTR(reservation_policy, 0644, | |
1693 | dasd_reservation_policy_show, dasd_reservation_policy_store); | |
1694 | ||
1695 | static ssize_t dasd_reservation_state_show(struct device *dev, | |
1696 | struct device_attribute *attr, | |
1697 | char *buf) | |
1698 | { | |
1699 | struct dasd_device *device; | |
1700 | int rc = 0; | |
1701 | ||
1702 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1703 | if (IS_ERR(device)) | |
4b9e0436 | 1704 | return sysfs_emit(buf, "none\n"); |
5a27e60d SW |
1705 | |
1706 | if (test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) | |
4b9e0436 | 1707 | rc = sysfs_emit(buf, "reserved\n"); |
5a27e60d | 1708 | else if (test_bit(DASD_FLAG_LOCK_STOLEN, &device->flags)) |
4b9e0436 | 1709 | rc = sysfs_emit(buf, "lost\n"); |
5a27e60d | 1710 | else |
4b9e0436 | 1711 | rc = sysfs_emit(buf, "none\n"); |
5a27e60d SW |
1712 | dasd_put_device(device); |
1713 | return rc; | |
1714 | } | |
1715 | ||
1716 | static ssize_t dasd_reservation_state_store(struct device *dev, | |
1717 | struct device_attribute *attr, | |
1718 | const char *buf, size_t count) | |
1719 | { | |
1720 | struct dasd_device *device; | |
1721 | int rc = 0; | |
1722 | ||
1723 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1724 | if (IS_ERR(device)) | |
1725 | return -ENODEV; | |
1726 | if (sysfs_streq("reset", buf)) | |
1727 | clear_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); | |
1728 | else | |
1729 | rc = -EINVAL; | |
1730 | dasd_put_device(device); | |
1731 | ||
1732 | if (rc) | |
1733 | return rc; | |
1734 | else | |
1735 | return count; | |
1736 | } | |
1737 | ||
1738 | static DEVICE_ATTR(last_known_reservation_state, 0644, | |
1739 | dasd_reservation_state_show, dasd_reservation_state_store); | |
1740 | ||
5db8440c SH |
1741 | static ssize_t dasd_pm_show(struct device *dev, |
1742 | struct device_attribute *attr, char *buf) | |
1743 | { | |
1744 | struct dasd_device *device; | |
a521b048 | 1745 | u8 opm, nppm, cablepm, cuirpm, hpfpm, ifccpm; |
5db8440c SH |
1746 | |
1747 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1748 | if (IS_ERR(device)) | |
1749 | return sprintf(buf, "0\n"); | |
1750 | ||
c9346151 SH |
1751 | opm = dasd_path_get_opm(device); |
1752 | nppm = dasd_path_get_nppm(device); | |
1753 | cablepm = dasd_path_get_cablepm(device); | |
1754 | cuirpm = dasd_path_get_cuirpm(device); | |
1755 | hpfpm = dasd_path_get_hpfpm(device); | |
a521b048 | 1756 | ifccpm = dasd_path_get_ifccpm(device); |
5db8440c SH |
1757 | dasd_put_device(device); |
1758 | ||
a521b048 SH |
1759 | return sprintf(buf, "%02x %02x %02x %02x %02x %02x\n", opm, nppm, |
1760 | cablepm, cuirpm, hpfpm, ifccpm); | |
5db8440c SH |
1761 | } |
1762 | ||
1763 | static DEVICE_ATTR(path_masks, 0444, dasd_pm_show, NULL); | |
1764 | ||
a521b048 SH |
1765 | /* |
1766 | * threshold value for IFCC/CCC errors | |
1767 | */ | |
1768 | static ssize_t | |
1769 | dasd_path_threshold_show(struct device *dev, | |
1770 | struct device_attribute *attr, char *buf) | |
1771 | { | |
1772 | struct dasd_device *device; | |
1773 | int len; | |
1774 | ||
1775 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1776 | if (IS_ERR(device)) | |
1777 | return -ENODEV; | |
4b9e0436 | 1778 | len = sysfs_emit(buf, "%lu\n", device->path_thrhld); |
a521b048 SH |
1779 | dasd_put_device(device); |
1780 | return len; | |
1781 | } | |
1782 | ||
1783 | static ssize_t | |
1784 | dasd_path_threshold_store(struct device *dev, struct device_attribute *attr, | |
1785 | const char *buf, size_t count) | |
1786 | { | |
1787 | struct dasd_device *device; | |
1788 | unsigned long flags; | |
1789 | unsigned long val; | |
1790 | ||
1791 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1792 | if (IS_ERR(device)) | |
1793 | return -ENODEV; | |
1794 | ||
defc2a9b | 1795 | if (kstrtoul(buf, 10, &val) != 0 || val > DASD_THRHLD_MAX) { |
a521b048 SH |
1796 | dasd_put_device(device); |
1797 | return -EINVAL; | |
1798 | } | |
1799 | spin_lock_irqsave(get_ccwdev_lock(to_ccwdev(dev)), flags); | |
defc2a9b | 1800 | device->path_thrhld = val; |
a521b048 SH |
1801 | spin_unlock_irqrestore(get_ccwdev_lock(to_ccwdev(dev)), flags); |
1802 | dasd_put_device(device); | |
1803 | return count; | |
1804 | } | |
a521b048 SH |
1805 | static DEVICE_ATTR(path_threshold, 0644, dasd_path_threshold_show, |
1806 | dasd_path_threshold_store); | |
ddc1c945 SH |
1807 | |
1808 | /* | |
1809 | * configure if path is disabled after IFCC/CCC error threshold is | |
1810 | * exceeded | |
1811 | */ | |
1812 | static ssize_t | |
1813 | dasd_path_autodisable_show(struct device *dev, | |
1814 | struct device_attribute *attr, char *buf) | |
1815 | { | |
1816 | struct dasd_devmap *devmap; | |
1817 | int flag; | |
1818 | ||
1819 | devmap = dasd_find_busid(dev_name(dev)); | |
1820 | if (!IS_ERR(devmap)) | |
1821 | flag = (devmap->features & DASD_FEATURE_PATH_AUTODISABLE) != 0; | |
1822 | else | |
1823 | flag = (DASD_FEATURE_DEFAULT & | |
1824 | DASD_FEATURE_PATH_AUTODISABLE) != 0; | |
4b9e0436 | 1825 | return sysfs_emit(buf, flag ? "1\n" : "0\n"); |
ddc1c945 SH |
1826 | } |
1827 | ||
1828 | static ssize_t | |
1829 | dasd_path_autodisable_store(struct device *dev, | |
1830 | struct device_attribute *attr, | |
1831 | const char *buf, size_t count) | |
1832 | { | |
1833 | unsigned int val; | |
1834 | int rc; | |
1835 | ||
1836 | if (kstrtouint(buf, 0, &val) || val > 1) | |
1837 | return -EINVAL; | |
1838 | ||
1839 | rc = dasd_set_feature(to_ccwdev(dev), | |
1840 | DASD_FEATURE_PATH_AUTODISABLE, val); | |
1841 | ||
1842 | return rc ? : count; | |
1843 | } | |
1844 | ||
1845 | static DEVICE_ATTR(path_autodisable, 0644, | |
1846 | dasd_path_autodisable_show, | |
1847 | dasd_path_autodisable_store); | |
a521b048 SH |
1848 | /* |
1849 | * interval for IFCC/CCC checks | |
1850 | * meaning time with no IFCC/CCC error before the error counter | |
1851 | * gets reset | |
1852 | */ | |
1853 | static ssize_t | |
1854 | dasd_path_interval_show(struct device *dev, | |
1855 | struct device_attribute *attr, char *buf) | |
1856 | { | |
1857 | struct dasd_device *device; | |
1858 | int len; | |
1859 | ||
1860 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1861 | if (IS_ERR(device)) | |
1862 | return -ENODEV; | |
4b9e0436 | 1863 | len = sysfs_emit(buf, "%lu\n", device->path_interval); |
a521b048 SH |
1864 | dasd_put_device(device); |
1865 | return len; | |
1866 | } | |
1867 | ||
1868 | static ssize_t | |
1869 | dasd_path_interval_store(struct device *dev, struct device_attribute *attr, | |
1870 | const char *buf, size_t count) | |
1871 | { | |
1872 | struct dasd_device *device; | |
1873 | unsigned long flags; | |
1874 | unsigned long val; | |
1875 | ||
1876 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1877 | if (IS_ERR(device)) | |
1878 | return -ENODEV; | |
1879 | ||
1880 | if ((kstrtoul(buf, 10, &val) != 0) || | |
1881 | (val > DASD_INTERVAL_MAX) || val == 0) { | |
1882 | dasd_put_device(device); | |
1883 | return -EINVAL; | |
1884 | } | |
1885 | spin_lock_irqsave(get_ccwdev_lock(to_ccwdev(dev)), flags); | |
1886 | if (val) | |
1887 | device->path_interval = val; | |
1888 | spin_unlock_irqrestore(get_ccwdev_lock(to_ccwdev(dev)), flags); | |
1889 | dasd_put_device(device); | |
1890 | return count; | |
1891 | } | |
1892 | ||
1893 | static DEVICE_ATTR(path_interval, 0644, dasd_path_interval_show, | |
1894 | dasd_path_interval_store); | |
1895 | ||
19508b20 JH |
1896 | static ssize_t |
1897 | dasd_device_fcs_show(struct device *dev, struct device_attribute *attr, | |
1898 | char *buf) | |
1899 | { | |
1900 | struct dasd_device *device; | |
1901 | int fc_sec; | |
1902 | int rc; | |
1903 | ||
1904 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
1905 | if (IS_ERR(device)) | |
1906 | return -ENODEV; | |
1907 | fc_sec = dasd_path_get_fcs_device(device); | |
1908 | if (fc_sec == -EINVAL) | |
4b9e0436 | 1909 | rc = sysfs_emit(buf, "Inconsistent\n"); |
19508b20 | 1910 | else |
4b9e0436 | 1911 | rc = sysfs_emit(buf, "%s\n", dasd_path_get_fcs_str(fc_sec)); |
19508b20 JH |
1912 | dasd_put_device(device); |
1913 | ||
1914 | return rc; | |
1915 | } | |
1916 | static DEVICE_ATTR(fc_security, 0444, dasd_device_fcs_show, NULL); | |
1917 | ||
1918 | static ssize_t | |
1919 | dasd_path_fcs_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) | |
1920 | { | |
1921 | struct dasd_path *path = to_dasd_path(kobj); | |
1922 | unsigned int fc_sec = path->fc_security; | |
1923 | ||
4b9e0436 | 1924 | return sysfs_emit(buf, "%s\n", dasd_path_get_fcs_str(fc_sec)); |
19508b20 JH |
1925 | } |
1926 | ||
1927 | static struct kobj_attribute path_fcs_attribute = | |
1928 | __ATTR(fc_security, 0444, dasd_path_fcs_show, NULL); | |
a521b048 | 1929 | |
a91ff09d SH |
1930 | /* |
1931 | * print copy relation in the form | |
1932 | * primary,secondary[1] primary,secondary[2], ... | |
1933 | */ | |
1934 | static ssize_t | |
1935 | dasd_copy_pair_show(struct device *dev, | |
1936 | struct device_attribute *attr, char *buf) | |
1937 | { | |
1938 | char prim_busid[DASD_BUS_ID_SIZE]; | |
1939 | struct dasd_copy_relation *copy; | |
1940 | struct dasd_devmap *devmap; | |
1941 | int len = 0; | |
1942 | int i; | |
1943 | ||
1944 | devmap = dasd_find_busid(dev_name(dev)); | |
1945 | if (IS_ERR(devmap)) | |
1946 | return -ENODEV; | |
1947 | ||
1948 | if (!devmap->copy) | |
1949 | return -ENODEV; | |
1950 | ||
1951 | copy = devmap->copy; | |
1952 | /* find primary */ | |
1953 | for (i = 0; i < DASD_CP_ENTRIES; i++) { | |
1954 | if (copy->entry[i].configured && copy->entry[i].primary) { | |
1955 | strscpy(prim_busid, copy->entry[i].busid, | |
1956 | DASD_BUS_ID_SIZE); | |
1957 | break; | |
1958 | } | |
1959 | } | |
1960 | if (!copy->entry[i].primary) | |
1961 | goto out; | |
1962 | ||
1963 | /* print all secondary */ | |
1964 | for (i = 0; i < DASD_CP_ENTRIES; i++) { | |
1965 | if (copy->entry[i].configured && !copy->entry[i].primary) | |
1966 | len += sysfs_emit_at(buf, len, "%s,%s ", prim_busid, | |
1967 | copy->entry[i].busid); | |
1968 | } | |
1969 | ||
1970 | len += sysfs_emit_at(buf, len, "\n"); | |
1971 | out: | |
1972 | return len; | |
1973 | } | |
1974 | ||
1975 | static int dasd_devmap_set_copy_relation(struct dasd_devmap *devmap, | |
1976 | struct dasd_copy_relation *copy, | |
1977 | char *busid, bool primary) | |
1978 | { | |
1979 | int i; | |
1980 | ||
1981 | /* find free entry */ | |
1982 | for (i = 0; i < DASD_CP_ENTRIES; i++) { | |
1983 | /* current bus_id already included, nothing to do */ | |
1984 | if (copy->entry[i].configured && | |
1985 | strncmp(copy->entry[i].busid, busid, DASD_BUS_ID_SIZE) == 0) | |
1986 | return 0; | |
1987 | ||
1988 | if (!copy->entry[i].configured) | |
1989 | break; | |
1990 | } | |
1991 | if (i == DASD_CP_ENTRIES) | |
1992 | return -EINVAL; | |
1993 | ||
1994 | copy->entry[i].configured = true; | |
1995 | strscpy(copy->entry[i].busid, busid, DASD_BUS_ID_SIZE); | |
1996 | if (primary) { | |
1997 | copy->active = ©->entry[i]; | |
1998 | copy->entry[i].primary = true; | |
1999 | } | |
2000 | if (!devmap->copy) | |
2001 | devmap->copy = copy; | |
2002 | ||
2003 | return 0; | |
2004 | } | |
2005 | ||
2006 | static void dasd_devmap_del_copy_relation(struct dasd_copy_relation *copy, | |
2007 | char *busid) | |
2008 | { | |
2009 | int i; | |
2010 | ||
2011 | spin_lock(&dasd_devmap_lock); | |
2012 | /* find entry */ | |
2013 | for (i = 0; i < DASD_CP_ENTRIES; i++) { | |
2014 | if (copy->entry[i].configured && | |
2015 | strncmp(copy->entry[i].busid, busid, DASD_BUS_ID_SIZE) == 0) | |
2016 | break; | |
2017 | } | |
2018 | if (i == DASD_CP_ENTRIES || !copy->entry[i].configured) { | |
2019 | spin_unlock(&dasd_devmap_lock); | |
2020 | return; | |
2021 | } | |
2022 | ||
2023 | copy->entry[i].configured = false; | |
2024 | memset(copy->entry[i].busid, 0, DASD_BUS_ID_SIZE); | |
2025 | if (copy->active == ©->entry[i]) { | |
2026 | copy->active = NULL; | |
2027 | copy->entry[i].primary = false; | |
2028 | } | |
2029 | spin_unlock(&dasd_devmap_lock); | |
2030 | } | |
2031 | ||
2032 | static int dasd_devmap_clear_copy_relation(struct device *dev) | |
2033 | { | |
2034 | struct dasd_copy_relation *copy; | |
2035 | struct dasd_devmap *devmap; | |
2036 | int i, rc = 1; | |
2037 | ||
2038 | devmap = dasd_devmap_from_cdev(to_ccwdev(dev)); | |
2039 | if (IS_ERR(devmap)) | |
2040 | return 1; | |
2041 | ||
2042 | spin_lock(&dasd_devmap_lock); | |
2043 | if (!devmap->copy) | |
2044 | goto out; | |
2045 | ||
2046 | copy = devmap->copy; | |
2047 | /* first check if all secondary devices are offline*/ | |
2048 | for (i = 0; i < DASD_CP_ENTRIES; i++) { | |
2049 | if (!copy->entry[i].configured) | |
2050 | continue; | |
2051 | ||
2052 | if (copy->entry[i].device == copy->active->device) | |
2053 | continue; | |
2054 | ||
2055 | if (copy->entry[i].device) | |
2056 | goto out; | |
2057 | } | |
2058 | /* clear all devmap entries */ | |
2059 | for (i = 0; i < DASD_CP_ENTRIES; i++) { | |
2060 | if (strlen(copy->entry[i].busid) == 0) | |
2061 | continue; | |
2062 | if (copy->entry[i].device) { | |
2063 | dasd_put_device(copy->entry[i].device); | |
2064 | copy->entry[i].device->copy = NULL; | |
2065 | copy->entry[i].device = NULL; | |
2066 | } | |
2067 | devmap = dasd_find_busid_locked(copy->entry[i].busid); | |
2068 | devmap->copy = NULL; | |
2069 | memset(copy->entry[i].busid, 0, DASD_BUS_ID_SIZE); | |
2070 | } | |
2071 | kfree(copy); | |
2072 | rc = 0; | |
2073 | out: | |
2074 | spin_unlock(&dasd_devmap_lock); | |
2075 | return rc; | |
2076 | } | |
2077 | ||
2078 | /* | |
2079 | * parse BUSIDs from a copy pair | |
2080 | */ | |
2081 | static int dasd_devmap_parse_busid(const char *buf, char *prim_busid, | |
2082 | char *sec_busid) | |
2083 | { | |
2084 | char *primary, *secondary, *tmp, *pt; | |
2085 | int id0, id1, id2; | |
2086 | ||
2087 | pt = kstrdup(buf, GFP_KERNEL); | |
2088 | tmp = pt; | |
2089 | if (!tmp) | |
2090 | return -ENOMEM; | |
2091 | ||
2092 | primary = strsep(&tmp, ","); | |
2093 | if (!primary) { | |
2094 | kfree(pt); | |
2095 | return -EINVAL; | |
2096 | } | |
2097 | secondary = strsep(&tmp, ","); | |
2098 | if (!secondary) { | |
2099 | kfree(pt); | |
2100 | return -EINVAL; | |
2101 | } | |
2102 | if (dasd_busid(primary, &id0, &id1, &id2)) { | |
2103 | kfree(pt); | |
2104 | return -EINVAL; | |
2105 | } | |
2106 | sprintf(prim_busid, "%01x.%01x.%04x", id0, id1, id2); | |
2107 | if (dasd_busid(secondary, &id0, &id1, &id2)) { | |
2108 | kfree(pt); | |
2109 | return -EINVAL; | |
2110 | } | |
2111 | sprintf(sec_busid, "%01x.%01x.%04x", id0, id1, id2); | |
2112 | kfree(pt); | |
2113 | ||
2114 | return 0; | |
2115 | } | |
2116 | ||
2117 | static ssize_t dasd_copy_pair_store(struct device *dev, | |
2118 | struct device_attribute *attr, | |
2119 | const char *buf, size_t count) | |
2120 | { | |
2121 | struct dasd_devmap *prim_devmap, *sec_devmap; | |
2122 | char prim_busid[DASD_BUS_ID_SIZE]; | |
2123 | char sec_busid[DASD_BUS_ID_SIZE]; | |
2124 | struct dasd_copy_relation *copy; | |
2125 | struct dasd_device *device; | |
2126 | bool pprc_enabled; | |
2127 | int rc; | |
2128 | ||
2129 | if (strncmp(buf, "clear", strlen("clear")) == 0) { | |
2130 | if (dasd_devmap_clear_copy_relation(dev)) | |
2131 | return -EINVAL; | |
2132 | return count; | |
2133 | } | |
2134 | ||
2135 | rc = dasd_devmap_parse_busid(buf, prim_busid, sec_busid); | |
2136 | if (rc) | |
2137 | return rc; | |
2138 | ||
2139 | if (strncmp(dev_name(dev), prim_busid, DASD_BUS_ID_SIZE) != 0 && | |
2140 | strncmp(dev_name(dev), sec_busid, DASD_BUS_ID_SIZE) != 0) | |
2141 | return -EINVAL; | |
2142 | ||
2143 | /* allocate primary devmap if needed */ | |
2144 | prim_devmap = dasd_find_busid(prim_busid); | |
2145 | if (IS_ERR(prim_devmap)) | |
2146 | prim_devmap = dasd_add_busid(prim_busid, DASD_FEATURE_DEFAULT); | |
2147 | ||
2148 | /* allocate secondary devmap if needed */ | |
2149 | sec_devmap = dasd_find_busid(sec_busid); | |
2150 | if (IS_ERR(sec_devmap)) | |
2151 | sec_devmap = dasd_add_busid(sec_busid, DASD_FEATURE_DEFAULT); | |
2152 | ||
2153 | /* setting copy relation is only allowed for offline secondary */ | |
2154 | if (sec_devmap->device) | |
2155 | return -EINVAL; | |
2156 | ||
2157 | if (prim_devmap->copy) { | |
2158 | copy = prim_devmap->copy; | |
2159 | } else if (sec_devmap->copy) { | |
2160 | copy = sec_devmap->copy; | |
2161 | } else { | |
2162 | copy = kzalloc(sizeof(*copy), GFP_KERNEL); | |
2163 | if (!copy) | |
2164 | return -ENOMEM; | |
2165 | } | |
2166 | spin_lock(&dasd_devmap_lock); | |
2167 | rc = dasd_devmap_set_copy_relation(prim_devmap, copy, prim_busid, true); | |
2168 | if (rc) { | |
2169 | spin_unlock(&dasd_devmap_lock); | |
2170 | return rc; | |
2171 | } | |
2172 | rc = dasd_devmap_set_copy_relation(sec_devmap, copy, sec_busid, false); | |
2173 | if (rc) { | |
2174 | spin_unlock(&dasd_devmap_lock); | |
2175 | return rc; | |
2176 | } | |
2177 | spin_unlock(&dasd_devmap_lock); | |
2178 | ||
2179 | /* if primary device is already online call device setup directly */ | |
2180 | if (prim_devmap->device && !prim_devmap->device->copy) { | |
2181 | device = prim_devmap->device; | |
2182 | if (device->discipline->pprc_enabled) { | |
2183 | pprc_enabled = device->discipline->pprc_enabled(device); | |
2184 | rc = dasd_devmap_set_device_copy_relation(device->cdev, | |
2185 | pprc_enabled); | |
2186 | } else { | |
2187 | rc = -EOPNOTSUPP; | |
2188 | } | |
2189 | } | |
2190 | if (rc) { | |
2191 | dasd_devmap_del_copy_relation(copy, prim_busid); | |
2192 | dasd_devmap_del_copy_relation(copy, sec_busid); | |
2193 | count = rc; | |
2194 | } | |
2195 | ||
2196 | return count; | |
2197 | } | |
2198 | static DEVICE_ATTR(copy_pair, 0644, dasd_copy_pair_show, | |
2199 | dasd_copy_pair_store); | |
2200 | ||
2201 | static ssize_t | |
2202 | dasd_copy_role_show(struct device *dev, | |
2203 | struct device_attribute *attr, char *buf) | |
2204 | { | |
2205 | struct dasd_copy_relation *copy; | |
2206 | struct dasd_device *device; | |
2207 | int len, i; | |
2208 | ||
2209 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
2210 | if (IS_ERR(device)) | |
2211 | return -ENODEV; | |
2212 | ||
2213 | if (!device->copy) { | |
2214 | len = sysfs_emit(buf, "none\n"); | |
2215 | goto out; | |
2216 | } | |
2217 | copy = device->copy; | |
2218 | /* only the active device is primary */ | |
2219 | if (copy->active->device == device) { | |
2220 | len = sysfs_emit(buf, "primary\n"); | |
2221 | goto out; | |
2222 | } | |
2223 | for (i = 0; i < DASD_CP_ENTRIES; i++) { | |
2224 | if (copy->entry[i].device == device) { | |
2225 | len = sysfs_emit(buf, "secondary\n"); | |
2226 | goto out; | |
2227 | } | |
2228 | } | |
2229 | /* not in the list, no COPY role */ | |
2230 | len = sysfs_emit(buf, "none\n"); | |
2231 | out: | |
2232 | dasd_put_device(device); | |
2233 | return len; | |
2234 | } | |
2235 | static DEVICE_ATTR(copy_role, 0444, dasd_copy_role_show, NULL); | |
2236 | ||
32ff8ce0 SH |
2237 | static ssize_t dasd_device_ping(struct device *dev, |
2238 | struct device_attribute *attr, | |
2239 | const char *buf, size_t count) | |
2240 | { | |
2241 | struct dasd_device *device; | |
2242 | size_t rc; | |
2243 | ||
2244 | device = dasd_device_from_cdev(to_ccwdev(dev)); | |
2245 | if (IS_ERR(device)) | |
2246 | return -ENODEV; | |
2247 | ||
2248 | /* | |
2249 | * do not try during offline processing | |
2250 | * early check only | |
2251 | * the sleep_on function itself checks for offline | |
2252 | * processing again | |
2253 | */ | |
2254 | if (test_bit(DASD_FLAG_OFFLINE, &device->flags)) { | |
2255 | rc = -EBUSY; | |
2256 | goto out; | |
2257 | } | |
2258 | if (!device->discipline || !device->discipline->device_ping) { | |
2259 | rc = -EOPNOTSUPP; | |
2260 | goto out; | |
2261 | } | |
2262 | rc = device->discipline->device_ping(device); | |
2263 | if (!rc) | |
2264 | rc = count; | |
2265 | out: | |
2266 | dasd_put_device(device); | |
2267 | return rc; | |
2268 | } | |
2269 | static DEVICE_ATTR(ping, 0200, NULL, dasd_device_ping); | |
2270 | ||
c729696b JH |
2271 | #define DASD_DEFINE_ATTR(_name, _func) \ |
2272 | static ssize_t dasd_##_name##_show(struct device *dev, \ | |
2273 | struct device_attribute *attr, \ | |
2274 | char *buf) \ | |
2275 | { \ | |
2276 | struct ccw_device *cdev = to_ccwdev(dev); \ | |
2277 | struct dasd_device *device = dasd_device_from_cdev(cdev); \ | |
2278 | int val = 0; \ | |
2279 | \ | |
2280 | if (IS_ERR(device)) \ | |
2281 | return -ENODEV; \ | |
2282 | if (device->discipline && _func) \ | |
2283 | val = _func(device); \ | |
2284 | dasd_put_device(device); \ | |
2285 | \ | |
4b9e0436 | 2286 | return sysfs_emit(buf, "%d\n", val); \ |
c729696b JH |
2287 | } \ |
2288 | static DEVICE_ATTR(_name, 0444, dasd_##_name##_show, NULL); \ | |
2289 | ||
2290 | DASD_DEFINE_ATTR(ese, device->discipline->is_ese); | |
2291 | DASD_DEFINE_ATTR(extent_size, device->discipline->ext_size); | |
2292 | DASD_DEFINE_ATTR(pool_id, device->discipline->ext_pool_id); | |
2293 | DASD_DEFINE_ATTR(space_configured, device->discipline->space_configured); | |
2294 | DASD_DEFINE_ATTR(space_allocated, device->discipline->space_allocated); | |
2295 | DASD_DEFINE_ATTR(logical_capacity, device->discipline->logical_capacity); | |
2296 | DASD_DEFINE_ATTR(warn_threshold, device->discipline->ext_pool_warn_thrshld); | |
2297 | DASD_DEFINE_ATTR(cap_at_warnlevel, device->discipline->ext_pool_cap_at_warnlevel); | |
2298 | DASD_DEFINE_ATTR(pool_oos, device->discipline->ext_pool_oos); | |
2299 | ||
1da177e4 LT |
2300 | static struct attribute * dasd_attrs[] = { |
2301 | &dev_attr_readonly.attr, | |
2302 | &dev_attr_discipline.attr, | |
4dfd5c45 | 2303 | &dev_attr_status.attr, |
3d052595 HH |
2304 | &dev_attr_alias.attr, |
2305 | &dev_attr_vendor.attr, | |
2306 | &dev_attr_uid.attr, | |
1da177e4 | 2307 | &dev_attr_use_diag.attr, |
e4dbb0f2 | 2308 | &dev_attr_raw_track_access.attr, |
20c64468 | 2309 | &dev_attr_eer_enabled.attr, |
9575bf26 | 2310 | &dev_attr_erplog.attr, |
13de227b | 2311 | &dev_attr_failfast.attr, |
7c8faa86 | 2312 | &dev_attr_expires.attr, |
1f1ee9ad | 2313 | &dev_attr_retries.attr, |
3d71ad32 | 2314 | &dev_attr_timeout.attr, |
5a27e60d SW |
2315 | &dev_attr_reservation_policy.attr, |
2316 | &dev_attr_last_known_reservation_state.attr, | |
d07dc5d8 | 2317 | &dev_attr_safe_offline.attr, |
5a3b7b11 | 2318 | &dev_attr_host_access_count.attr, |
5db8440c | 2319 | &dev_attr_path_masks.attr, |
a521b048 | 2320 | &dev_attr_path_threshold.attr, |
ddc1c945 | 2321 | &dev_attr_path_autodisable.attr, |
a521b048 SH |
2322 | &dev_attr_path_interval.attr, |
2323 | &dev_attr_path_reset.attr, | |
2324 | &dev_attr_hpf.attr, | |
c729696b | 2325 | &dev_attr_ese.attr, |
19508b20 | 2326 | &dev_attr_fc_security.attr, |
a91ff09d SH |
2327 | &dev_attr_copy_pair.attr, |
2328 | &dev_attr_copy_role.attr, | |
32ff8ce0 | 2329 | &dev_attr_ping.attr, |
1da177e4 LT |
2330 | NULL, |
2331 | }; | |
2332 | ||
13171677 | 2333 | static const struct attribute_group dasd_attr_group = { |
1da177e4 LT |
2334 | .attrs = dasd_attrs, |
2335 | }; | |
2336 | ||
c729696b JH |
2337 | static struct attribute *capacity_attrs[] = { |
2338 | &dev_attr_space_configured.attr, | |
2339 | &dev_attr_space_allocated.attr, | |
2340 | &dev_attr_logical_capacity.attr, | |
2341 | NULL, | |
2342 | }; | |
2343 | ||
2344 | static const struct attribute_group capacity_attr_group = { | |
2345 | .name = "capacity", | |
2346 | .attrs = capacity_attrs, | |
2347 | }; | |
2348 | ||
2349 | static struct attribute *ext_pool_attrs[] = { | |
2350 | &dev_attr_pool_id.attr, | |
2351 | &dev_attr_extent_size.attr, | |
2352 | &dev_attr_warn_threshold.attr, | |
2353 | &dev_attr_cap_at_warnlevel.attr, | |
2354 | &dev_attr_pool_oos.attr, | |
2355 | NULL, | |
2356 | }; | |
2357 | ||
2358 | static const struct attribute_group ext_pool_attr_group = { | |
2359 | .name = "extent_pool", | |
2360 | .attrs = ext_pool_attrs, | |
2361 | }; | |
2362 | ||
1987c551 | 2363 | const struct attribute_group *dasd_dev_groups[] = { |
c729696b JH |
2364 | &dasd_attr_group, |
2365 | &capacity_attr_group, | |
2366 | &ext_pool_attr_group, | |
2367 | NULL, | |
2368 | }; | |
1987c551 | 2369 | EXPORT_SYMBOL_GPL(dasd_dev_groups); |
c729696b | 2370 | |
f24acd45 HH |
2371 | /* |
2372 | * Return value of the specified feature. | |
2373 | */ | |
2374 | int | |
2375 | dasd_get_feature(struct ccw_device *cdev, int feature) | |
2376 | { | |
2377 | struct dasd_devmap *devmap; | |
2378 | ||
2a0217d5 | 2379 | devmap = dasd_find_busid(dev_name(&cdev->dev)); |
f24acd45 | 2380 | if (IS_ERR(devmap)) |
40545573 | 2381 | return PTR_ERR(devmap); |
f24acd45 HH |
2382 | |
2383 | return ((devmap->features & feature) != 0); | |
2384 | } | |
2385 | ||
2386 | /* | |
2387 | * Set / reset given feature. | |
48fc7f7e | 2388 | * Flag indicates whether to set (!=0) or the reset (=0) the feature. |
f24acd45 HH |
2389 | */ |
2390 | int | |
2391 | dasd_set_feature(struct ccw_device *cdev, int feature, int flag) | |
2392 | { | |
2393 | struct dasd_devmap *devmap; | |
2394 | ||
1081f3a7 | 2395 | devmap = dasd_devmap_from_cdev(cdev); |
f24acd45 | 2396 | if (IS_ERR(devmap)) |
40545573 | 2397 | return PTR_ERR(devmap); |
f24acd45 HH |
2398 | |
2399 | spin_lock(&dasd_devmap_lock); | |
2400 | if (flag) | |
2401 | devmap->features |= feature; | |
2402 | else | |
2403 | devmap->features &= ~feature; | |
c6eb7b77 HH |
2404 | if (devmap->device) |
2405 | devmap->device->features = devmap->features; | |
f24acd45 HH |
2406 | spin_unlock(&dasd_devmap_lock); |
2407 | return 0; | |
2408 | } | |
28b841b3 | 2409 | EXPORT_SYMBOL(dasd_set_feature); |
f24acd45 | 2410 | |
19508b20 JH |
2411 | static struct attribute *paths_info_attrs[] = { |
2412 | &path_fcs_attribute.attr, | |
2413 | NULL, | |
2414 | }; | |
0704a858 | 2415 | ATTRIBUTE_GROUPS(paths_info); |
19508b20 JH |
2416 | |
2417 | static struct kobj_type path_attr_type = { | |
2418 | .release = dasd_path_release, | |
0704a858 | 2419 | .default_groups = paths_info_groups, |
19508b20 JH |
2420 | .sysfs_ops = &kobj_sysfs_ops, |
2421 | }; | |
2422 | ||
2423 | static void dasd_path_init_kobj(struct dasd_device *device, int chp) | |
2424 | { | |
2425 | device->path[chp].kobj.kset = device->paths_info; | |
2426 | kobject_init(&device->path[chp].kobj, &path_attr_type); | |
2427 | } | |
2428 | ||
2429 | void dasd_path_create_kobj(struct dasd_device *device, int chp) | |
2430 | { | |
2431 | int rc; | |
2432 | ||
2433 | if (test_bit(DASD_FLAG_OFFLINE, &device->flags)) | |
2434 | return; | |
2435 | if (!device->paths_info) { | |
2436 | dev_warn(&device->cdev->dev, "Unable to create paths objects\n"); | |
2437 | return; | |
2438 | } | |
2439 | if (device->path[chp].in_sysfs) | |
2440 | return; | |
2441 | if (!device->path[chp].conf_data) | |
2442 | return; | |
2443 | ||
2444 | dasd_path_init_kobj(device, chp); | |
2445 | ||
2446 | rc = kobject_add(&device->path[chp].kobj, NULL, "%x.%02x", | |
2447 | device->path[chp].cssid, device->path[chp].chpid); | |
2448 | if (rc) | |
2449 | kobject_put(&device->path[chp].kobj); | |
2450 | device->path[chp].in_sysfs = true; | |
2451 | } | |
2452 | EXPORT_SYMBOL(dasd_path_create_kobj); | |
2453 | ||
2454 | void dasd_path_create_kobjects(struct dasd_device *device) | |
2455 | { | |
2456 | u8 lpm, opm; | |
2457 | ||
2458 | opm = dasd_path_get_opm(device); | |
2459 | for (lpm = 0x80; lpm; lpm >>= 1) { | |
2460 | if (!(lpm & opm)) | |
2461 | continue; | |
2462 | dasd_path_create_kobj(device, pathmask_to_pos(lpm)); | |
2463 | } | |
2464 | } | |
2465 | EXPORT_SYMBOL(dasd_path_create_kobjects); | |
2466 | ||
ac55ad2b | 2467 | static void dasd_path_remove_kobj(struct dasd_device *device, int chp) |
19508b20 JH |
2468 | { |
2469 | if (device->path[chp].in_sysfs) { | |
2470 | kobject_put(&device->path[chp].kobj); | |
2471 | device->path[chp].in_sysfs = false; | |
2472 | } | |
2473 | } | |
ac55ad2b JH |
2474 | |
2475 | /* | |
2476 | * As we keep kobjects for the lifetime of a device, this function must not be | |
2477 | * called anywhere but in the context of offlining a device. | |
2478 | */ | |
2479 | void dasd_path_remove_kobjects(struct dasd_device *device) | |
2480 | { | |
2481 | int i; | |
2482 | ||
2483 | for (i = 0; i < 8; i++) | |
2484 | dasd_path_remove_kobj(device, i); | |
2485 | } | |
2486 | EXPORT_SYMBOL(dasd_path_remove_kobjects); | |
f24acd45 | 2487 | |
1da177e4 LT |
2488 | int |
2489 | dasd_devmap_init(void) | |
2490 | { | |
2491 | int i; | |
2492 | ||
2493 | /* Initialize devmap structures. */ | |
2494 | dasd_max_devindex = 0; | |
2495 | for (i = 0; i < 256; i++) | |
2496 | INIT_LIST_HEAD(&dasd_hashlists[i]); | |
40545573 | 2497 | return 0; |
1da177e4 LT |
2498 | } |
2499 | ||
2500 | void | |
2501 | dasd_devmap_exit(void) | |
2502 | { | |
2503 | dasd_forget_ranges(); | |
2504 | } |