Blame view
kernel/params.c
21.9 KB
1da177e4c Linux-2.6.12-rc2 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 |
/* Helpers for initial module or kernel cmdline parsing Copyright (C) 2001 Rusty Russell. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ |
72a59aaad kernel: params.c ... |
18 |
#include <linux/module.h> |
1da177e4c Linux-2.6.12-rc2 |
19 20 21 22 23 24 |
#include <linux/kernel.h> #include <linux/string.h> #include <linux/errno.h> #include <linux/module.h> #include <linux/device.h> #include <linux/err.h> |
4e57b6817 [PATCH] fix missi... |
25 |
#include <linux/slab.h> |
26d052bfc param: allow whit... |
26 |
#include <linux/ctype.h> |
1da177e4c Linux-2.6.12-rc2 |
27 |
|
907b29eb4 param: locking fo... |
28 29 |
/* Protects all parameters, and incidentally kmalloced_param list. */ static DEFINE_MUTEX(param_lock); |
a1054322a param: use free h... |
30 31 32 33 34 |
/* This just allows us to keep track of which parameters are kmalloced. */ struct kmalloced_param { struct list_head list; char val[]; }; |
a1054322a param: use free h... |
35 36 37 38 39 40 41 42 43 |
static LIST_HEAD(kmalloced_params); static void *kmalloc_parameter(unsigned int size) { struct kmalloced_param *p; p = kmalloc(sizeof(*p) + size, GFP_KERNEL); if (!p) return NULL; |
a1054322a param: use free h... |
44 |
list_add(&p->list, &kmalloced_params); |
a1054322a param: use free h... |
45 46 47 48 49 50 51 |
return p->val; } /* Does nothing if parameter wasn't kmalloced above. */ static void maybe_kfree_parameter(void *param) { struct kmalloced_param *p; |
a1054322a param: use free h... |
52 53 54 55 56 57 58 |
list_for_each_entry(p, &kmalloced_params, list) { if (p->val == param) { list_del(&p->list); kfree(p); break; } } |
a1054322a param: use free h... |
59 |
} |
b1e4d20cb params: make dash... |
60 |
static char dash2underscore(char c) |
1da177e4c Linux-2.6.12-rc2 |
61 62 63 64 65 |
{ if (c == '-') return '_'; return c; } |
b1e4d20cb params: make dash... |
66 |
bool parameqn(const char *a, const char *b, size_t n) |
1da177e4c Linux-2.6.12-rc2 |
67 |
{ |
b1e4d20cb params: make dash... |
68 69 70 71 72 73 74 75 76 77 78 79 |
size_t i; for (i = 0; i < n; i++) { if (dash2underscore(a[i]) != dash2underscore(b[i])) return false; } return true; } bool parameq(const char *a, const char *b) { return parameqn(a, b, strlen(a)+1); |
1da177e4c Linux-2.6.12-rc2 |
80 81 82 83 |
} static int parse_one(char *param, char *val, |
914dcaa84 param: make param... |
84 |
const struct kernel_param *params, |
1da177e4c Linux-2.6.12-rc2 |
85 86 87 88 |
unsigned num_params, int (*handle_unknown)(char *param, char *val)) { unsigned int i; |
907b29eb4 param: locking fo... |
89 |
int err; |
1da177e4c Linux-2.6.12-rc2 |
90 91 92 93 |
/* Find parameter */ for (i = 0; i < num_params; i++) { if (parameq(param, params[i].name)) { |
25985edce Fix common misspe... |
94 |
/* No one handled NULL, so do it here. */ |
9bbb9e5a3 param: use ops in... |
95 |
if (!val && params[i].ops->set != param_set_bool) |
2e9fb9953 params: don't han... |
96 |
return -EINVAL; |
8487bfd95 kernel/params: re... |
97 98 |
pr_debug("They are equal! Calling %p ", |
9bbb9e5a3 param: use ops in... |
99 |
params[i].ops->set); |
907b29eb4 param: locking fo... |
100 101 102 103 |
mutex_lock(¶m_lock); err = params[i].ops->set(val, ¶ms[i]); mutex_unlock(¶m_lock); return err; |
1da177e4c Linux-2.6.12-rc2 |
104 105 106 107 |
} } if (handle_unknown) { |
8487bfd95 kernel/params: re... |
108 109 |
pr_debug("Unknown argument: calling %p ", handle_unknown); |
1da177e4c Linux-2.6.12-rc2 |
110 111 |
return handle_unknown(param, val); } |
8487bfd95 kernel/params: re... |
112 113 |
pr_debug("Unknown argument `%s' ", param); |
1da177e4c Linux-2.6.12-rc2 |
114 115 116 117 118 119 120 121 122 123 |
return -ENOENT; } /* You can use " around spaces, but can't escape ". */ /* Hyphens and underscores equivalent in parameter names. */ static char *next_arg(char *args, char **param, char **val) { unsigned int i, equals = 0; int in_quote = 0, quoted = 0; char *next; |
1da177e4c Linux-2.6.12-rc2 |
124 125 126 127 128 129 130 |
if (*args == '"') { args++; in_quote = 1; quoted = 1; } for (i = 0; args[i]; i++) { |
26d052bfc param: allow whit... |
131 |
if (isspace(args[i]) && !in_quote) |
1da177e4c Linux-2.6.12-rc2 |
132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 |
break; if (equals == 0) { if (args[i] == '=') equals = i; } if (args[i] == '"') in_quote = !in_quote; } *param = args; if (!equals) *val = NULL; else { args[equals] = '\0'; *val = args + equals + 1; /* Don't include quotes in value. */ if (**val == '"') { (*val)++; if (args[i-1] == '"') args[i-1] = '\0'; } if (quoted && args[i-1] == '"') args[i-1] = '\0'; } if (args[i]) { args[i] = '\0'; next = args + i + 1; } else next = args + i; |
f36462f07 [PATCH] Ignore tr... |
163 164 |
/* Chew up trailing spaces. */ |
e7d2860b6 tree-wide: conver... |
165 |
return skip_spaces(next); |
1da177e4c Linux-2.6.12-rc2 |
166 167 168 169 170 |
} /* Args looks like "foo=bar,bar2 baz=fuz wiz". */ int parse_args(const char *name, char *args, |
914dcaa84 param: make param... |
171 |
const struct kernel_param *params, |
1da177e4c Linux-2.6.12-rc2 |
172 173 174 175 |
unsigned num, int (*unknown)(char *param, char *val)) { char *param, *val; |
8487bfd95 kernel/params: re... |
176 177 |
pr_debug("Parsing ARGS: %s ", args); |
1da177e4c Linux-2.6.12-rc2 |
178 |
|
f36462f07 [PATCH] Ignore tr... |
179 |
/* Chew leading spaces */ |
e7d2860b6 tree-wide: conver... |
180 |
args = skip_spaces(args); |
f36462f07 [PATCH] Ignore tr... |
181 |
|
1da177e4c Linux-2.6.12-rc2 |
182 183 |
while (*args) { int ret; |
a416aba63 [PATCH] kernelpar... |
184 |
int irq_was_disabled; |
1da177e4c Linux-2.6.12-rc2 |
185 186 |
args = next_arg(args, ¶m, &val); |
a416aba63 [PATCH] kernelpar... |
187 |
irq_was_disabled = irqs_disabled(); |
1da177e4c Linux-2.6.12-rc2 |
188 |
ret = parse_one(param, val, params, num, unknown); |
a416aba63 [PATCH] kernelpar... |
189 190 191 192 193 |
if (irq_was_disabled && !irqs_disabled()) { printk(KERN_WARNING "parse_args(): option '%s' enabled " "irq's! ", param); } |
1da177e4c Linux-2.6.12-rc2 |
194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 |
switch (ret) { case -ENOENT: printk(KERN_ERR "%s: Unknown parameter `%s' ", name, param); return ret; case -ENOSPC: printk(KERN_ERR "%s: `%s' too large for parameter `%s' ", name, val ?: "", param); return ret; case 0: break; default: printk(KERN_ERR "%s: `%s' invalid for parameter `%s' ", name, val ?: "", param); return ret; } } /* All parsed OK. */ return 0; } /* Lazy bastard, eh? */ #define STANDARD_PARAM_DEF(name, type, format, tmptype, strtolfn) \ |
9bbb9e5a3 param: use ops in... |
223 |
int param_set_##name(const char *val, const struct kernel_param *kp) \ |
1da177e4c Linux-2.6.12-rc2 |
224 |
{ \ |
1da177e4c Linux-2.6.12-rc2 |
225 |
tmptype l; \ |
06b2a76d2 Add new string fu... |
226 |
int ret; \ |
1da177e4c Linux-2.6.12-rc2 |
227 |
\ |
06b2a76d2 Add new string fu... |
228 |
ret = strtolfn(val, 0, &l); \ |
81c741365 param: fix return... |
229 230 |
if (ret < 0 || ((type)l != l)) \ return ret < 0 ? ret : -EINVAL; \ |
1da177e4c Linux-2.6.12-rc2 |
231 232 233 |
*((type *)kp->arg) = l; \ return 0; \ } \ |
9bbb9e5a3 param: use ops in... |
234 |
int param_get_##name(char *buffer, const struct kernel_param *kp) \ |
1da177e4c Linux-2.6.12-rc2 |
235 236 |
{ \ return sprintf(buffer, format, *((type *)kp->arg)); \ |
a14fe249a param: move the E... |
237 |
} \ |
9bbb9e5a3 param: use ops in... |
238 239 240 241 |
struct kernel_param_ops param_ops_##name = { \ .set = param_set_##name, \ .get = param_get_##name, \ }; \ |
a14fe249a param: move the E... |
242 |
EXPORT_SYMBOL(param_set_##name); \ |
9bbb9e5a3 param: use ops in... |
243 244 |
EXPORT_SYMBOL(param_get_##name); \ EXPORT_SYMBOL(param_ops_##name) |
1da177e4c Linux-2.6.12-rc2 |
245 |
|
06b2a76d2 Add new string fu... |
246 247 248 249 250 251 252 |
STANDARD_PARAM_DEF(byte, unsigned char, "%c", unsigned long, strict_strtoul); STANDARD_PARAM_DEF(short, short, "%hi", long, strict_strtol); STANDARD_PARAM_DEF(ushort, unsigned short, "%hu", unsigned long, strict_strtoul); STANDARD_PARAM_DEF(int, int, "%i", long, strict_strtol); STANDARD_PARAM_DEF(uint, unsigned int, "%u", unsigned long, strict_strtoul); STANDARD_PARAM_DEF(long, long, "%li", long, strict_strtol); STANDARD_PARAM_DEF(ulong, unsigned long, "%lu", unsigned long, strict_strtoul); |
1da177e4c Linux-2.6.12-rc2 |
253 |
|
9bbb9e5a3 param: use ops in... |
254 |
int param_set_charp(const char *val, const struct kernel_param *kp) |
1da177e4c Linux-2.6.12-rc2 |
255 |
{ |
1da177e4c Linux-2.6.12-rc2 |
256 257 258 259 260 261 |
if (strlen(val) > 1024) { printk(KERN_ERR "%s: string parameter too long ", kp->name); return -ENOSPC; } |
a1054322a param: use free h... |
262 263 264 |
maybe_kfree_parameter(*(char **)kp->arg); /* This is a hack. We can't kmalloc in early boot, and we |
e180a6b77 param: fix charp ... |
265 266 |
* don't need to; this mangled commandline is preserved. */ if (slab_is_available()) { |
a1054322a param: use free h... |
267 |
*(char **)kp->arg = kmalloc_parameter(strlen(val)+1); |
d553ad864 param: fix NULL c... |
268 |
if (!*(char **)kp->arg) |
e180a6b77 param: fix charp ... |
269 |
return -ENOMEM; |
a1054322a param: use free h... |
270 |
strcpy(*(char **)kp->arg, val); |
e180a6b77 param: fix charp ... |
271 272 |
} else *(const char **)kp->arg = val; |
1da177e4c Linux-2.6.12-rc2 |
273 274 |
return 0; } |
a14fe249a param: move the E... |
275 |
EXPORT_SYMBOL(param_set_charp); |
1da177e4c Linux-2.6.12-rc2 |
276 |
|
9bbb9e5a3 param: use ops in... |
277 |
int param_get_charp(char *buffer, const struct kernel_param *kp) |
1da177e4c Linux-2.6.12-rc2 |
278 279 280 |
{ return sprintf(buffer, "%s", *((char **)kp->arg)); } |
a14fe249a param: move the E... |
281 |
EXPORT_SYMBOL(param_get_charp); |
1da177e4c Linux-2.6.12-rc2 |
282 |
|
a1054322a param: use free h... |
283 284 285 286 |
static void param_free_charp(void *arg) { maybe_kfree_parameter(*((char **)arg)); } |
9bbb9e5a3 param: use ops in... |
287 288 289 |
struct kernel_param_ops param_ops_charp = { .set = param_set_charp, .get = param_get_charp, |
a1054322a param: use free h... |
290 |
.free = param_free_charp, |
9bbb9e5a3 param: use ops in... |
291 292 |
}; EXPORT_SYMBOL(param_ops_charp); |
fddd52012 module_param: all... |
293 |
/* Actually could be a bool or an int, for historical reasons. */ |
9bbb9e5a3 param: use ops in... |
294 |
int param_set_bool(const char *val, const struct kernel_param *kp) |
1da177e4c Linux-2.6.12-rc2 |
295 |
{ |
fddd52012 module_param: all... |
296 |
bool v; |
f721a465c params.c: Use new... |
297 |
int ret; |
fddd52012 module_param: all... |
298 |
|
1da177e4c Linux-2.6.12-rc2 |
299 300 301 302 |
/* No equals means "set"... */ if (!val) val = "1"; /* One of =[yYnN01] */ |
f721a465c params.c: Use new... |
303 304 305 |
ret = strtobool(val, &v); if (ret) return ret; |
fddd52012 module_param: all... |
306 307 308 309 310 311 |
if (kp->flags & KPARAM_ISBOOL) *(bool *)kp->arg = v; else *(int *)kp->arg = v; return 0; |
1da177e4c Linux-2.6.12-rc2 |
312 |
} |
a14fe249a param: move the E... |
313 |
EXPORT_SYMBOL(param_set_bool); |
1da177e4c Linux-2.6.12-rc2 |
314 |
|
9bbb9e5a3 param: use ops in... |
315 |
int param_get_bool(char *buffer, const struct kernel_param *kp) |
1da177e4c Linux-2.6.12-rc2 |
316 |
{ |
fddd52012 module_param: all... |
317 318 319 320 321 |
bool val; if (kp->flags & KPARAM_ISBOOL) val = *(bool *)kp->arg; else val = *(int *)kp->arg; |
1da177e4c Linux-2.6.12-rc2 |
322 |
/* Y and N chosen as being relatively non-coder friendly */ |
fddd52012 module_param: all... |
323 |
return sprintf(buffer, "%c", val ? 'Y' : 'N'); |
1da177e4c Linux-2.6.12-rc2 |
324 |
} |
a14fe249a param: move the E... |
325 |
EXPORT_SYMBOL(param_get_bool); |
1da177e4c Linux-2.6.12-rc2 |
326 |
|
9bbb9e5a3 param: use ops in... |
327 328 329 330 331 |
struct kernel_param_ops param_ops_bool = { .set = param_set_bool, .get = param_get_bool, }; EXPORT_SYMBOL(param_ops_bool); |
fddd52012 module_param: all... |
332 |
/* This one must be bool. */ |
9bbb9e5a3 param: use ops in... |
333 |
int param_set_invbool(const char *val, const struct kernel_param *kp) |
1da177e4c Linux-2.6.12-rc2 |
334 |
{ |
fddd52012 module_param: all... |
335 336 |
int ret; bool boolval; |
22e48eaf5 constify string/a... |
337 |
struct kernel_param dummy; |
1da177e4c Linux-2.6.12-rc2 |
338 |
|
22e48eaf5 constify string/a... |
339 |
dummy.arg = &boolval; |
fddd52012 module_param: all... |
340 |
dummy.flags = KPARAM_ISBOOL; |
1da177e4c Linux-2.6.12-rc2 |
341 342 |
ret = param_set_bool(val, &dummy); if (ret == 0) |
9a71af2c3 module_param: inv... |
343 |
*(bool *)kp->arg = !boolval; |
1da177e4c Linux-2.6.12-rc2 |
344 345 |
return ret; } |
a14fe249a param: move the E... |
346 |
EXPORT_SYMBOL(param_set_invbool); |
1da177e4c Linux-2.6.12-rc2 |
347 |
|
9bbb9e5a3 param: use ops in... |
348 |
int param_get_invbool(char *buffer, const struct kernel_param *kp) |
1da177e4c Linux-2.6.12-rc2 |
349 |
{ |
9a71af2c3 module_param: inv... |
350 |
return sprintf(buffer, "%c", (*(bool *)kp->arg) ? 'N' : 'Y'); |
1da177e4c Linux-2.6.12-rc2 |
351 |
} |
a14fe249a param: move the E... |
352 |
EXPORT_SYMBOL(param_get_invbool); |
1da177e4c Linux-2.6.12-rc2 |
353 |
|
9bbb9e5a3 param: use ops in... |
354 355 356 357 358 |
struct kernel_param_ops param_ops_invbool = { .set = param_set_invbool, .get = param_get_invbool, }; EXPORT_SYMBOL(param_ops_invbool); |
69116f279 module_param: avo... |
359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 |
int param_set_bint(const char *val, const struct kernel_param *kp) { struct kernel_param boolkp; bool v; int ret; /* Match bool exactly, by re-using it. */ boolkp = *kp; boolkp.arg = &v; boolkp.flags |= KPARAM_ISBOOL; ret = param_set_bool(val, &boolkp); if (ret == 0) *(int *)kp->arg = v; return ret; } EXPORT_SYMBOL(param_set_bint); struct kernel_param_ops param_ops_bint = { .set = param_set_bint, .get = param_get_int, }; EXPORT_SYMBOL(param_ops_bint); |
9730b5b06 kernel/params.c: ... |
382 |
/* We break the rule and mangle the string. */ |
9871728b7 [PATCH] kernel/pa... |
383 384 385 386 |
static int param_array(const char *name, const char *val, unsigned int min, unsigned int max, void *elem, int elemsize, |
9bbb9e5a3 param: use ops in... |
387 |
int (*set)(const char *, const struct kernel_param *kp), |
3c7d76e37 param: fix settin... |
388 |
u16 flags, |
eb38a996e kernel/params.c: ... |
389 |
unsigned int *num) |
1da177e4c Linux-2.6.12-rc2 |
390 391 392 393 394 395 396 397 |
{ int ret; struct kernel_param kp; char save; /* Get the name right for errors. */ kp.name = name; kp.arg = elem; |
3c7d76e37 param: fix settin... |
398 |
kp.flags = flags; |
1da177e4c Linux-2.6.12-rc2 |
399 |
|
1da177e4c Linux-2.6.12-rc2 |
400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 |
*num = 0; /* We expect a comma-separated list of values. */ do { int len; if (*num == max) { printk(KERN_ERR "%s: can only take %i arguments ", name, max); return -EINVAL; } len = strcspn(val, ","); /* nul-terminate and parse */ save = val[len]; ((char *)val)[len] = '\0'; |
907b29eb4 param: locking fo... |
416 |
BUG_ON(!mutex_is_locked(¶m_lock)); |
1da177e4c Linux-2.6.12-rc2 |
417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 |
ret = set(val, &kp); if (ret != 0) return ret; kp.arg += elemsize; val += len+1; (*num)++; } while (save == ','); if (*num < min) { printk(KERN_ERR "%s: needs at least %i arguments ", name, min); return -EINVAL; } return 0; } |
9bbb9e5a3 param: use ops in... |
434 |
static int param_array_set(const char *val, const struct kernel_param *kp) |
1da177e4c Linux-2.6.12-rc2 |
435 |
{ |
22e48eaf5 constify string/a... |
436 |
const struct kparam_array *arr = kp->arr; |
31143a120 [PATCH] kernel/pa... |
437 |
unsigned int temp_num; |
1da177e4c Linux-2.6.12-rc2 |
438 439 |
return param_array(kp->name, val, 1, arr->max, arr->elem, |
9bbb9e5a3 param: use ops in... |
440 |
arr->elemsize, arr->ops->set, kp->flags, |
3c7d76e37 param: fix settin... |
441 |
arr->num ?: &temp_num); |
1da177e4c Linux-2.6.12-rc2 |
442 |
} |
9bbb9e5a3 param: use ops in... |
443 |
static int param_array_get(char *buffer, const struct kernel_param *kp) |
1da177e4c Linux-2.6.12-rc2 |
444 445 |
{ int i, off, ret; |
22e48eaf5 constify string/a... |
446 |
const struct kparam_array *arr = kp->arr; |
1da177e4c Linux-2.6.12-rc2 |
447 448 449 450 451 452 453 |
struct kernel_param p; p = *kp; for (i = off = 0; i < (arr->num ? *arr->num : arr->max); i++) { if (i) buffer[off++] = ','; p.arg = arr->elem + arr->elemsize * i; |
907b29eb4 param: locking fo... |
454 |
BUG_ON(!mutex_is_locked(¶m_lock)); |
9bbb9e5a3 param: use ops in... |
455 |
ret = arr->ops->get(buffer + off, &p); |
1da177e4c Linux-2.6.12-rc2 |
456 457 458 459 460 461 462 |
if (ret < 0) return ret; off += ret; } buffer[off] = '\0'; return off; } |
e6df34a44 param: add a free... |
463 464 465 466 467 468 469 470 471 |
static void param_array_free(void *arg) { unsigned int i; const struct kparam_array *arr = arg; if (arr->ops->free) for (i = 0; i < (arr->num ? *arr->num : arr->max); i++) arr->ops->free(arr->elem + arr->elemsize * i); } |
9bbb9e5a3 param: use ops in... |
472 473 474 |
struct kernel_param_ops param_array_ops = { .set = param_array_set, .get = param_array_get, |
e6df34a44 param: add a free... |
475 |
.free = param_array_free, |
9bbb9e5a3 param: use ops in... |
476 477 478 479 |
}; EXPORT_SYMBOL(param_array_ops); int param_set_copystring(const char *val, const struct kernel_param *kp) |
1da177e4c Linux-2.6.12-rc2 |
480 |
{ |
22e48eaf5 constify string/a... |
481 |
const struct kparam_string *kps = kp->str; |
1da177e4c Linux-2.6.12-rc2 |
482 483 484 485 486 487 488 489 490 491 |
if (strlen(val)+1 > kps->maxlen) { printk(KERN_ERR "%s: string doesn't fit in %u chars. ", kp->name, kps->maxlen-1); return -ENOSPC; } strcpy(kps->string, val); return 0; } |
a14fe249a param: move the E... |
492 |
EXPORT_SYMBOL(param_set_copystring); |
1da177e4c Linux-2.6.12-rc2 |
493 |
|
9bbb9e5a3 param: use ops in... |
494 |
int param_get_string(char *buffer, const struct kernel_param *kp) |
1da177e4c Linux-2.6.12-rc2 |
495 |
{ |
22e48eaf5 constify string/a... |
496 |
const struct kparam_string *kps = kp->str; |
1da177e4c Linux-2.6.12-rc2 |
497 498 |
return strlcpy(buffer, kps->string, kps->maxlen); } |
a14fe249a param: move the E... |
499 |
EXPORT_SYMBOL(param_get_string); |
1da177e4c Linux-2.6.12-rc2 |
500 |
|
9bbb9e5a3 param: use ops in... |
501 502 503 504 505 |
struct kernel_param_ops param_ops_string = { .set = param_set_copystring, .get = param_get_string, }; EXPORT_SYMBOL(param_ops_string); |
1da177e4c Linux-2.6.12-rc2 |
506 |
/* sysfs output in /sys/modules/XYZ/parameters/ */ |
350f82586 Remove redundant ... |
507 508 |
#define to_module_attr(n) container_of(n, struct module_attribute, attr) #define to_module_kobject(n) container_of(n, struct module_kobject, kobj) |
1da177e4c Linux-2.6.12-rc2 |
509 510 |
extern struct kernel_param __start___param[], __stop___param[]; |
1da177e4c Linux-2.6.12-rc2 |
511 512 513 |
struct param_attribute { struct module_attribute mattr; |
9bbb9e5a3 param: use ops in... |
514 |
const struct kernel_param *param; |
1da177e4c Linux-2.6.12-rc2 |
515 516 517 518 |
}; struct module_param_attrs { |
9b473de87 param: Fix duplic... |
519 |
unsigned int num; |
1da177e4c Linux-2.6.12-rc2 |
520 521 522 |
struct attribute_group grp; struct param_attribute attrs[0]; }; |
ef665c1a0 sysfs: fix build ... |
523 |
#ifdef CONFIG_SYSFS |
350f82586 Remove redundant ... |
524 |
#define to_param_attr(n) container_of(n, struct param_attribute, mattr) |
1da177e4c Linux-2.6.12-rc2 |
525 526 |
static ssize_t param_attr_show(struct module_attribute *mattr, |
4befb026c module: change at... |
527 |
struct module_kobject *mk, char *buf) |
1da177e4c Linux-2.6.12-rc2 |
528 529 530 |
{ int count; struct param_attribute *attribute = to_param_attr(mattr); |
9bbb9e5a3 param: use ops in... |
531 |
if (!attribute->param->ops->get) |
1da177e4c Linux-2.6.12-rc2 |
532 |
return -EPERM; |
907b29eb4 param: locking fo... |
533 |
mutex_lock(¶m_lock); |
9bbb9e5a3 param: use ops in... |
534 |
count = attribute->param->ops->get(buf, attribute->param); |
907b29eb4 param: locking fo... |
535 |
mutex_unlock(¶m_lock); |
1da177e4c Linux-2.6.12-rc2 |
536 537 538 539 540 541 542 543 544 545 |
if (count > 0) { strcat(buf, " "); ++count; } return count; } /* sysfs always hands a nul-terminated string in buf. We rely on that. */ static ssize_t param_attr_store(struct module_attribute *mattr, |
4befb026c module: change at... |
546 |
struct module_kobject *km, |
1da177e4c Linux-2.6.12-rc2 |
547 548 549 550 |
const char *buf, size_t len) { int err; struct param_attribute *attribute = to_param_attr(mattr); |
9bbb9e5a3 param: use ops in... |
551 |
if (!attribute->param->ops->set) |
1da177e4c Linux-2.6.12-rc2 |
552 |
return -EPERM; |
907b29eb4 param: locking fo... |
553 |
mutex_lock(¶m_lock); |
9bbb9e5a3 param: use ops in... |
554 |
err = attribute->param->ops->set(buf, attribute->param); |
907b29eb4 param: locking fo... |
555 |
mutex_unlock(¶m_lock); |
1da177e4c Linux-2.6.12-rc2 |
556 557 558 559 |
if (!err) return len; return err; } |
ef665c1a0 sysfs: fix build ... |
560 |
#endif |
1da177e4c Linux-2.6.12-rc2 |
561 562 563 564 565 566 |
#ifdef CONFIG_MODULES #define __modinit #else #define __modinit __init #endif |
ef665c1a0 sysfs: fix build ... |
567 |
#ifdef CONFIG_SYSFS |
907b29eb4 param: locking fo... |
568 569 570 571 572 573 574 575 576 577 578 |
void __kernel_param_lock(void) { mutex_lock(¶m_lock); } EXPORT_SYMBOL(__kernel_param_lock); void __kernel_param_unlock(void) { mutex_unlock(¶m_lock); } EXPORT_SYMBOL(__kernel_param_unlock); |
1da177e4c Linux-2.6.12-rc2 |
579 |
/* |
9b473de87 param: Fix duplic... |
580 581 582 583 |
* add_sysfs_param - add a parameter to sysfs * @mk: struct module_kobject * @kparam: the actual parameter definition to add to sysfs * @name: name of parameter |
1da177e4c Linux-2.6.12-rc2 |
584 |
* |
9b473de87 param: Fix duplic... |
585 586 587 |
* Create a kobject if for a (per-module) parameter if mp NULL, and * create file in sysfs. Returns an error on out of memory. Always cleans up * if there's an error. |
1da177e4c Linux-2.6.12-rc2 |
588 |
*/ |
9b473de87 param: Fix duplic... |
589 |
static __modinit int add_sysfs_param(struct module_kobject *mk, |
9bbb9e5a3 param: use ops in... |
590 |
const struct kernel_param *kp, |
9b473de87 param: Fix duplic... |
591 |
const char *name) |
1da177e4c Linux-2.6.12-rc2 |
592 |
{ |
9b473de87 param: Fix duplic... |
593 594 595 596 597 598 599 600 601 602 603 604 605 |
struct module_param_attrs *new; struct attribute **attrs; int err, num; /* We don't bother calling this with invisible parameters. */ BUG_ON(!kp->perm); if (!mk->mp) { num = 0; attrs = NULL; } else { num = mk->mp->num; attrs = mk->mp->grp.attrs; |
1da177e4c Linux-2.6.12-rc2 |
606 |
} |
9b473de87 param: Fix duplic... |
607 608 609 610 611 612 613 614 615 616 617 618 619 620 |
/* Enlarge. */ new = krealloc(mk->mp, sizeof(*mk->mp) + sizeof(mk->mp->attrs[0]) * (num+1), GFP_KERNEL); if (!new) { kfree(mk->mp); err = -ENOMEM; goto fail; } attrs = krealloc(attrs, sizeof(new->grp.attrs[0])*(num+2), GFP_KERNEL); if (!attrs) { err = -ENOMEM; goto fail_free_new; } |
1da177e4c Linux-2.6.12-rc2 |
621 |
|
9b473de87 param: Fix duplic... |
622 623 624 625 626 627 628 629 |
/* Sysfs wants everything zeroed. */ memset(new, 0, sizeof(*new)); memset(&new->attrs[num], 0, sizeof(new->attrs[num])); memset(&attrs[num], 0, sizeof(attrs[num])); new->grp.name = "parameters"; new->grp.attrs = attrs; /* Tack new one on the end. */ |
a07e4156a sysfs: Use sysfs_... |
630 |
sysfs_attr_init(&new->attrs[num].mattr.attr); |
9b473de87 param: Fix duplic... |
631 632 633 634 635 636 637 638 639 640 641 642 643 644 |
new->attrs[num].param = kp; new->attrs[num].mattr.show = param_attr_show; new->attrs[num].mattr.store = param_attr_store; new->attrs[num].mattr.attr.name = (char *)name; new->attrs[num].mattr.attr.mode = kp->perm; new->num = num+1; /* Fix up all the pointers, since krealloc can move us */ for (num = 0; num < new->num; num++) new->grp.attrs[num] = &new->attrs[num].mattr.attr; new->grp.attrs[num] = NULL; mk->mp = new; return 0; |
1da177e4c Linux-2.6.12-rc2 |
645 |
|
9b473de87 param: Fix duplic... |
646 647 648 649 650 651 |
fail_free_new: kfree(new); fail: mk->mp = NULL; return err; } |
1da177e4c Linux-2.6.12-rc2 |
652 |
|
d2441183d Fix compile warni... |
653 |
#ifdef CONFIG_MODULES |
9b473de87 param: Fix duplic... |
654 655 656 657 658 |
static void free_module_param_attrs(struct module_kobject *mk) { kfree(mk->mp->grp.attrs); kfree(mk->mp); mk->mp = NULL; |
1da177e4c Linux-2.6.12-rc2 |
659 |
} |
1da177e4c Linux-2.6.12-rc2 |
660 661 662 663 664 665 |
/* * module_param_sysfs_setup - setup sysfs support for one module * @mod: module * @kparam: module parameters (array) * @num_params: number of module parameters * |
9b473de87 param: Fix duplic... |
666 667 |
* Adds sysfs entries for module parameters under * /sys/module/[mod->name]/parameters/ |
1da177e4c Linux-2.6.12-rc2 |
668 669 |
*/ int module_param_sysfs_setup(struct module *mod, |
9bbb9e5a3 param: use ops in... |
670 |
const struct kernel_param *kparam, |
1da177e4c Linux-2.6.12-rc2 |
671 672 |
unsigned int num_params) { |
9b473de87 param: Fix duplic... |
673 674 675 676 677 678 679 680 681 682 683 |
int i, err; bool params = false; for (i = 0; i < num_params; i++) { if (kparam[i].perm == 0) continue; err = add_sysfs_param(&mod->mkobj, &kparam[i], kparam[i].name); if (err) return err; params = true; } |
1da177e4c Linux-2.6.12-rc2 |
684 |
|
9b473de87 param: Fix duplic... |
685 686 |
if (!params) return 0; |
1da177e4c Linux-2.6.12-rc2 |
687 |
|
9b473de87 param: Fix duplic... |
688 689 690 691 692 |
/* Create the param group. */ err = sysfs_create_group(&mod->mkobj.kobj, &mod->mkobj.mp->grp); if (err) free_module_param_attrs(&mod->mkobj); return err; |
1da177e4c Linux-2.6.12-rc2 |
693 694 695 696 697 698 699 700 701 702 703 |
} /* * module_param_sysfs_remove - remove sysfs support for one module * @mod: module * * Remove sysfs entries for module parameters and the corresponding * kobject. */ void module_param_sysfs_remove(struct module *mod) { |
9b473de87 param: Fix duplic... |
704 705 |
if (mod->mkobj.mp) { sysfs_remove_group(&mod->mkobj.kobj, &mod->mkobj.mp->grp); |
1da177e4c Linux-2.6.12-rc2 |
706 707 |
/* We are positive that no one is using any param * attrs at this point. Deallocate immediately. */ |
9b473de87 param: Fix duplic... |
708 |
free_module_param_attrs(&mod->mkobj); |
1da177e4c Linux-2.6.12-rc2 |
709 710 711 |
} } #endif |
e180a6b77 param: fix charp ... |
712 713 |
void destroy_params(const struct kernel_param *params, unsigned num) { |
e6df34a44 param: add a free... |
714 715 716 717 718 |
unsigned int i; for (i = 0; i < num; i++) if (params[i].ops->free) params[i].ops->free(params[i].arg); |
e180a6b77 param: fix charp ... |
719 |
} |
e94965ed5 module: show vers... |
720 |
static struct module_kobject * __init locate_module_kobject(const char *name) |
1da177e4c Linux-2.6.12-rc2 |
721 722 |
{ struct module_kobject *mk; |
9b473de87 param: Fix duplic... |
723 724 |
struct kobject *kobj; int err; |
1da177e4c Linux-2.6.12-rc2 |
725 |
|
9b473de87 param: Fix duplic... |
726 727 |
kobj = kset_find_obj(module_kset, name); if (kobj) { |
9b473de87 param: Fix duplic... |
728 |
mk = to_module_kobject(kobj); |
9b473de87 param: Fix duplic... |
729 730 731 732 733 734 735 736 |
} else { mk = kzalloc(sizeof(struct module_kobject), GFP_KERNEL); BUG_ON(!mk); mk->mod = THIS_MODULE; mk->kobj.kset = module_kset; err = kobject_init_and_add(&mk->kobj, &module_ktype, NULL, "%s", name); |
88bfa3247 module: add /sys/... |
737 738 739 740 |
#ifdef CONFIG_MODULES if (!err) err = sysfs_create_file(&mk->kobj, &module_uevent.attr); #endif |
9b473de87 param: Fix duplic... |
741 742 |
if (err) { kobject_put(&mk->kobj); |
e94965ed5 module: show vers... |
743 744 745 746 747 748 749 750 |
printk(KERN_ERR "Module '%s' failed add to sysfs, error number %d ", name, err); printk(KERN_ERR "The system will be unstable now. "); return NULL; |
9b473de87 param: Fix duplic... |
751 |
} |
e94965ed5 module: show vers... |
752 753 |
/* So that we hold reference in both cases. */ |
9b473de87 param: Fix duplic... |
754 |
kobject_get(&mk->kobj); |
74c5b597e modules: better e... |
755 |
} |
9b473de87 param: Fix duplic... |
756 |
|
e94965ed5 module: show vers... |
757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 |
return mk; } static void __init kernel_add_sysfs_param(const char *name, struct kernel_param *kparam, unsigned int name_skip) { struct module_kobject *mk; int err; mk = locate_module_kobject(name); if (!mk) return; /* We need to remove old parameters before adding more. */ if (mk->mp) sysfs_remove_group(&mk->kobj, &mk->mp->grp); |
9b473de87 param: Fix duplic... |
774 775 776 777 778 |
/* These should not fail at boot. */ err = add_sysfs_param(mk, kparam, kparam->name + name_skip); BUG_ON(err); err = sysfs_create_group(&mk->kobj, &mk->mp->grp); BUG_ON(err); |
f30c53a87 MODULES: add the ... |
779 |
kobject_uevent(&mk->kobj, KOBJ_ADD); |
9b473de87 param: Fix duplic... |
780 |
kobject_put(&mk->kobj); |
1da177e4c Linux-2.6.12-rc2 |
781 782 783 784 785 786 787 788 789 790 |
} /* * param_sysfs_builtin - add contents in /sys/parameters for built-in modules * * Add module_parameters to sysfs for "modules" built into the kernel. * * The "module" name (KBUILD_MODNAME) is stored before a dot, the * "parameter" name is stored behind a dot in kernel_param->name. So, * extract the "module" name for all built-in kernel_param-eters, |
9b473de87 param: Fix duplic... |
791 |
* and for all who have the same, call kernel_add_sysfs_param. |
1da177e4c Linux-2.6.12-rc2 |
792 793 794 |
*/ static void __init param_sysfs_builtin(void) { |
9b473de87 param: Fix duplic... |
795 796 797 |
struct kernel_param *kp; unsigned int name_len; char modname[MODULE_NAME_LEN]; |
1da177e4c Linux-2.6.12-rc2 |
798 |
|
9b473de87 param: Fix duplic... |
799 |
for (kp = __start___param; kp < __stop___param; kp++) { |
1da177e4c Linux-2.6.12-rc2 |
800 |
char *dot; |
9b473de87 param: Fix duplic... |
801 802 |
if (kp->perm == 0) continue; |
1da177e4c Linux-2.6.12-rc2 |
803 |
|
730b69d22 module: check ker... |
804 |
dot = strchr(kp->name, '.'); |
1da177e4c Linux-2.6.12-rc2 |
805 |
if (!dot) { |
67e67ceaa core_param() for ... |
806 807 808 809 810 811 |
/* This happens for core_param() */ strcpy(modname, "kernel"); name_len = 0; } else { name_len = dot - kp->name + 1; strlcpy(modname, kp->name, name_len); |
1da177e4c Linux-2.6.12-rc2 |
812 |
} |
67e67ceaa core_param() for ... |
813 |
kernel_add_sysfs_param(modname, kp, name_len); |
1da177e4c Linux-2.6.12-rc2 |
814 |
} |
1da177e4c Linux-2.6.12-rc2 |
815 |
} |
e94965ed5 module: show vers... |
816 |
ssize_t __modver_version_show(struct module_attribute *mattr, |
4befb026c module: change at... |
817 |
struct module_kobject *mk, char *buf) |
e94965ed5 module: show vers... |
818 819 820 821 822 823 824 |
{ struct module_version_attribute *vattr = container_of(mattr, struct module_version_attribute, mattr); return sprintf(buf, "%s ", vattr->version); } |
b4bc84280 module: deal with... |
825 826 |
extern const struct module_version_attribute *__start___modver[]; extern const struct module_version_attribute *__stop___modver[]; |
e94965ed5 module: show vers... |
827 828 829 |
static void __init version_sysfs_builtin(void) { |
b4bc84280 module: deal with... |
830 |
const struct module_version_attribute **p; |
e94965ed5 module: show vers... |
831 832 |
struct module_kobject *mk; int err; |
b4bc84280 module: deal with... |
833 834 |
for (p = __start___modver; p < __stop___modver; p++) { const struct module_version_attribute *vattr = *p; |
e94965ed5 module: show vers... |
835 836 837 838 839 840 841 842 |
mk = locate_module_kobject(vattr->module_name); if (mk) { err = sysfs_create_file(&mk->kobj, &vattr->mattr.attr); kobject_uevent(&mk->kobj, KOBJ_ADD); kobject_put(&mk->kobj); } } } |
1da177e4c Linux-2.6.12-rc2 |
843 844 |
/* module-related sysfs stuff */ |
1da177e4c Linux-2.6.12-rc2 |
845 |
|
1da177e4c Linux-2.6.12-rc2 |
846 847 848 849 850 851 852 853 854 855 856 857 |
static ssize_t module_attr_show(struct kobject *kobj, struct attribute *attr, char *buf) { struct module_attribute *attribute; struct module_kobject *mk; int ret; attribute = to_module_attr(attr); mk = to_module_kobject(kobj); if (!attribute->show) |
70f2817a4 [PATCH] sysfs: (r... |
858 |
return -EIO; |
1da177e4c Linux-2.6.12-rc2 |
859 |
|
4befb026c module: change at... |
860 |
ret = attribute->show(attribute, mk, buf); |
1da177e4c Linux-2.6.12-rc2 |
861 |
|
1da177e4c Linux-2.6.12-rc2 |
862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 |
return ret; } static ssize_t module_attr_store(struct kobject *kobj, struct attribute *attr, const char *buf, size_t len) { struct module_attribute *attribute; struct module_kobject *mk; int ret; attribute = to_module_attr(attr); mk = to_module_kobject(kobj); if (!attribute->store) |
70f2817a4 [PATCH] sysfs: (r... |
877 |
return -EIO; |
1da177e4c Linux-2.6.12-rc2 |
878 |
|
4befb026c module: change at... |
879 |
ret = attribute->store(attribute, mk, buf, len); |
1da177e4c Linux-2.6.12-rc2 |
880 |
|
1da177e4c Linux-2.6.12-rc2 |
881 882 |
return ret; } |
52cf25d0a Driver core: Cons... |
883 |
static const struct sysfs_ops module_sysfs_ops = { |
1da177e4c Linux-2.6.12-rc2 |
884 885 886 |
.show = module_attr_show, .store = module_attr_store, }; |
270a6c4ca /sys/modules/*/ho... |
887 888 889 890 891 892 893 894 |
static int uevent_filter(struct kset *kset, struct kobject *kobj) { struct kobj_type *ktype = get_ktype(kobj); if (ktype == &module_ktype) return 1; return 0; } |
9cd43611c kobject: Constify... |
895 |
static const struct kset_uevent_ops module_uevent_ops = { |
270a6c4ca /sys/modules/*/ho... |
896 897 |
.filter = uevent_filter, }; |
7405c1e15 kset: convert /sy... |
898 |
struct kset *module_kset; |
823bccfc4 remove "struct su... |
899 |
int module_sysfs_initialized; |
1da177e4c Linux-2.6.12-rc2 |
900 |
|
7405c1e15 kset: convert /sy... |
901 |
struct kobj_type module_ktype = { |
1da177e4c Linux-2.6.12-rc2 |
902 903 |
.sysfs_ops = &module_sysfs_ops, }; |
1da177e4c Linux-2.6.12-rc2 |
904 905 906 907 908 |
/* * param_sysfs_init - wrapper for built-in params support */ static int __init param_sysfs_init(void) { |
7405c1e15 kset: convert /sy... |
909 910 911 912 913 914 |
module_kset = kset_create_and_add("module", &module_uevent_ops, NULL); if (!module_kset) { printk(KERN_WARNING "%s (%d): error creating kset ", __FILE__, __LINE__); return -ENOMEM; |
d8c7649e9 [PATCH] kernel/pa... |
915 |
} |
823bccfc4 remove "struct su... |
916 |
module_sysfs_initialized = 1; |
1da177e4c Linux-2.6.12-rc2 |
917 |
|
e94965ed5 module: show vers... |
918 |
version_sysfs_builtin(); |
1da177e4c Linux-2.6.12-rc2 |
919 920 921 922 |
param_sysfs_builtin(); return 0; } |
d10be6d1b [PATCH] module_su... |
923 |
subsys_initcall(param_sysfs_init); |
1da177e4c Linux-2.6.12-rc2 |
924 |
|
7405c1e15 kset: convert /sy... |
925 |
#endif /* CONFIG_SYSFS */ |