Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* Helpers for initial module or kernel cmdline parsing |
| 2 | Copyright (C) 2001 Rusty Russell. |
| 3 | |
| 4 | This program is free software; you can redistribute it and/or modify |
| 5 | it under the terms of the GNU General Public License as published by |
| 6 | the Free Software Foundation; either version 2 of the License, or |
| 7 | (at your option) any later version. |
| 8 | |
| 9 | This program is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | GNU General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License |
| 15 | along with this program; if not, write to the Free Software |
| 16 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 17 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/kernel.h> |
| 19 | #include <linux/string.h> |
| 20 | #include <linux/errno.h> |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/device.h> |
| 23 | #include <linux/err.h> |
Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 24 | #include <linux/slab.h> |
Peter Oberparleiter | 26d052b | 2009-07-06 17:11:22 +0200 | [diff] [blame] | 25 | #include <linux/ctype.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
Rusty Russell | 907b29e | 2010-08-11 23:04:19 -0600 | [diff] [blame] | 27 | /* Protects all parameters, and incidentally kmalloced_param list. */ |
| 28 | static DEFINE_MUTEX(param_lock); |
| 29 | |
Rusty Russell | a105432 | 2010-08-11 23:04:18 -0600 | [diff] [blame] | 30 | /* This just allows us to keep track of which parameters are kmalloced. */ |
| 31 | struct kmalloced_param { |
| 32 | struct list_head list; |
| 33 | char val[]; |
| 34 | }; |
Rusty Russell | a105432 | 2010-08-11 23:04:18 -0600 | [diff] [blame] | 35 | static LIST_HEAD(kmalloced_params); |
| 36 | |
| 37 | static void *kmalloc_parameter(unsigned int size) |
| 38 | { |
| 39 | struct kmalloced_param *p; |
| 40 | |
| 41 | p = kmalloc(sizeof(*p) + size, GFP_KERNEL); |
| 42 | if (!p) |
| 43 | return NULL; |
| 44 | |
Rusty Russell | a105432 | 2010-08-11 23:04:18 -0600 | [diff] [blame] | 45 | list_add(&p->list, &kmalloced_params); |
Rusty Russell | a105432 | 2010-08-11 23:04:18 -0600 | [diff] [blame] | 46 | return p->val; |
| 47 | } |
| 48 | |
| 49 | /* Does nothing if parameter wasn't kmalloced above. */ |
| 50 | static void maybe_kfree_parameter(void *param) |
| 51 | { |
| 52 | struct kmalloced_param *p; |
| 53 | |
Rusty Russell | a105432 | 2010-08-11 23:04:18 -0600 | [diff] [blame] | 54 | list_for_each_entry(p, &kmalloced_params, list) { |
| 55 | if (p->val == param) { |
| 56 | list_del(&p->list); |
| 57 | kfree(p); |
| 58 | break; |
| 59 | } |
| 60 | } |
Rusty Russell | a105432 | 2010-08-11 23:04:18 -0600 | [diff] [blame] | 61 | } |
| 62 | |
Michal Schmidt | b1e4d20 | 2011-10-10 00:03:37 +0200 | [diff] [blame] | 63 | static char dash2underscore(char c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | { |
| 65 | if (c == '-') |
| 66 | return '_'; |
| 67 | return c; |
| 68 | } |
| 69 | |
Michal Schmidt | b1e4d20 | 2011-10-10 00:03:37 +0200 | [diff] [blame] | 70 | bool parameqn(const char *a, const char *b, size_t n) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | { |
Michal Schmidt | b1e4d20 | 2011-10-10 00:03:37 +0200 | [diff] [blame] | 72 | size_t i; |
| 73 | |
| 74 | for (i = 0; i < n; i++) { |
| 75 | if (dash2underscore(a[i]) != dash2underscore(b[i])) |
| 76 | return false; |
| 77 | } |
| 78 | return true; |
| 79 | } |
| 80 | |
| 81 | bool parameq(const char *a, const char *b) |
| 82 | { |
| 83 | return parameqn(a, b, strlen(a)+1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | } |
| 85 | |
| 86 | static int parse_one(char *param, |
| 87 | char *val, |
Jim Cromie | 9fb48c7 | 2012-04-27 14:30:34 -0600 | [diff] [blame] | 88 | const char *doing, |
Rusty Russell | 914dcaa | 2010-08-11 23:04:18 -0600 | [diff] [blame] | 89 | const struct kernel_param *params, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | unsigned num_params, |
Pawel Moll | 026cee0 | 2012-03-26 12:50:51 +1030 | [diff] [blame] | 91 | s16 min_level, |
| 92 | s16 max_level, |
Jim Cromie | 9fb48c7 | 2012-04-27 14:30:34 -0600 | [diff] [blame] | 93 | int (*handle_unknown)(char *param, char *val, |
| 94 | const char *doing)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | { |
| 96 | unsigned int i; |
Rusty Russell | 907b29e | 2010-08-11 23:04:19 -0600 | [diff] [blame] | 97 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | |
| 99 | /* Find parameter */ |
| 100 | for (i = 0; i < num_params; i++) { |
| 101 | if (parameq(param, params[i].name)) { |
Pawel Moll | 026cee0 | 2012-03-26 12:50:51 +1030 | [diff] [blame] | 102 | if (params[i].level < min_level |
| 103 | || params[i].level > max_level) |
| 104 | return 0; |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 105 | /* No one handled NULL, so do it here. */ |
Steven Rostedt | ab013c5 | 2013-08-20 15:33:19 +0930 | [diff] [blame] | 106 | if (!val && |
| 107 | !(params[i].ops->flags & KERNEL_PARAM_FL_NOARG)) |
Rusty Russell | 2e9fb99 | 2010-08-11 23:04:10 -0600 | [diff] [blame] | 108 | return -EINVAL; |
Jim Cromie | 9fb48c7 | 2012-04-27 14:30:34 -0600 | [diff] [blame] | 109 | pr_debug("handling %s with %p\n", param, |
| 110 | params[i].ops->set); |
Rusty Russell | 907b29e | 2010-08-11 23:04:19 -0600 | [diff] [blame] | 111 | mutex_lock(¶m_lock); |
| 112 | err = params[i].ops->set(val, ¶ms[i]); |
| 113 | mutex_unlock(¶m_lock); |
| 114 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | } |
| 116 | } |
| 117 | |
| 118 | if (handle_unknown) { |
Jim Cromie | 9fb48c7 | 2012-04-27 14:30:34 -0600 | [diff] [blame] | 119 | pr_debug("doing %s: %s='%s'\n", doing, param, val); |
| 120 | return handle_unknown(param, val, doing); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | } |
| 122 | |
Jim Cromie | 9fb48c7 | 2012-04-27 14:30:34 -0600 | [diff] [blame] | 123 | pr_debug("Unknown argument '%s'\n", param); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | return -ENOENT; |
| 125 | } |
| 126 | |
| 127 | /* You can use " around spaces, but can't escape ". */ |
| 128 | /* Hyphens and underscores equivalent in parameter names. */ |
| 129 | static char *next_arg(char *args, char **param, char **val) |
| 130 | { |
| 131 | unsigned int i, equals = 0; |
| 132 | int in_quote = 0, quoted = 0; |
| 133 | char *next; |
| 134 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | if (*args == '"') { |
| 136 | args++; |
| 137 | in_quote = 1; |
| 138 | quoted = 1; |
| 139 | } |
| 140 | |
| 141 | for (i = 0; args[i]; i++) { |
Peter Oberparleiter | 26d052b | 2009-07-06 17:11:22 +0200 | [diff] [blame] | 142 | if (isspace(args[i]) && !in_quote) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | break; |
| 144 | if (equals == 0) { |
| 145 | if (args[i] == '=') |
| 146 | equals = i; |
| 147 | } |
| 148 | if (args[i] == '"') |
| 149 | in_quote = !in_quote; |
| 150 | } |
| 151 | |
| 152 | *param = args; |
| 153 | if (!equals) |
| 154 | *val = NULL; |
| 155 | else { |
| 156 | args[equals] = '\0'; |
| 157 | *val = args + equals + 1; |
| 158 | |
| 159 | /* Don't include quotes in value. */ |
| 160 | if (**val == '"') { |
| 161 | (*val)++; |
| 162 | if (args[i-1] == '"') |
| 163 | args[i-1] = '\0'; |
| 164 | } |
| 165 | if (quoted && args[i-1] == '"') |
| 166 | args[i-1] = '\0'; |
| 167 | } |
| 168 | |
| 169 | if (args[i]) { |
| 170 | args[i] = '\0'; |
| 171 | next = args + i + 1; |
| 172 | } else |
| 173 | next = args + i; |
Rusty Russell | f36462f | 2005-09-27 21:45:34 -0700 | [diff] [blame] | 174 | |
| 175 | /* Chew up trailing spaces. */ |
André Goddard Rosa | e7d2860 | 2009-12-14 18:01:06 -0800 | [diff] [blame] | 176 | return skip_spaces(next); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | } |
| 178 | |
| 179 | /* Args looks like "foo=bar,bar2 baz=fuz wiz". */ |
Jim Cromie | 9fb48c7 | 2012-04-27 14:30:34 -0600 | [diff] [blame] | 180 | int parse_args(const char *doing, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | char *args, |
Rusty Russell | 914dcaa | 2010-08-11 23:04:18 -0600 | [diff] [blame] | 182 | const struct kernel_param *params, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | unsigned num, |
Pawel Moll | 026cee0 | 2012-03-26 12:50:51 +1030 | [diff] [blame] | 184 | s16 min_level, |
| 185 | s16 max_level, |
Jim Cromie | 9fb48c7 | 2012-04-27 14:30:34 -0600 | [diff] [blame] | 186 | int (*unknown)(char *param, char *val, const char *doing)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | { |
| 188 | char *param, *val; |
| 189 | |
Rusty Russell | f36462f | 2005-09-27 21:45:34 -0700 | [diff] [blame] | 190 | /* Chew leading spaces */ |
André Goddard Rosa | e7d2860 | 2009-12-14 18:01:06 -0800 | [diff] [blame] | 191 | args = skip_spaces(args); |
Rusty Russell | f36462f | 2005-09-27 21:45:34 -0700 | [diff] [blame] | 192 | |
Jim Cromie | 1ef9eaf | 2012-05-03 11:57:37 -0600 | [diff] [blame] | 193 | if (*args) |
Jim Cromie | 9fb48c7 | 2012-04-27 14:30:34 -0600 | [diff] [blame] | 194 | pr_debug("doing %s, parsing ARGS: '%s'\n", doing, args); |
| 195 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | while (*args) { |
| 197 | int ret; |
Ard van Breemen | a416aba | 2007-01-05 16:36:20 -0800 | [diff] [blame] | 198 | int irq_was_disabled; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | |
| 200 | args = next_arg(args, ¶m, &val); |
Ard van Breemen | a416aba | 2007-01-05 16:36:20 -0800 | [diff] [blame] | 201 | irq_was_disabled = irqs_disabled(); |
Jim Cromie | 9fb48c7 | 2012-04-27 14:30:34 -0600 | [diff] [blame] | 202 | ret = parse_one(param, val, doing, params, num, |
Pawel Moll | 026cee0 | 2012-03-26 12:50:51 +1030 | [diff] [blame] | 203 | min_level, max_level, unknown); |
Jim Cromie | b5f3abf | 2012-05-03 18:22:44 -0600 | [diff] [blame] | 204 | if (irq_was_disabled && !irqs_disabled()) |
| 205 | pr_warn("%s: option '%s' enabled irq's!\n", |
| 206 | doing, param); |
| 207 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | switch (ret) { |
| 209 | case -ENOENT: |
Jim Cromie | b5f3abf | 2012-05-03 18:22:44 -0600 | [diff] [blame] | 210 | pr_err("%s: Unknown parameter `%s'\n", doing, param); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | return ret; |
| 212 | case -ENOSPC: |
Jim Cromie | b5f3abf | 2012-05-03 18:22:44 -0600 | [diff] [blame] | 213 | pr_err("%s: `%s' too large for parameter `%s'\n", |
Jim Cromie | 9fb48c7 | 2012-04-27 14:30:34 -0600 | [diff] [blame] | 214 | doing, val ?: "", param); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | return ret; |
| 216 | case 0: |
| 217 | break; |
| 218 | default: |
Jim Cromie | b5f3abf | 2012-05-03 18:22:44 -0600 | [diff] [blame] | 219 | pr_err("%s: `%s' invalid for parameter `%s'\n", |
Jim Cromie | 9fb48c7 | 2012-04-27 14:30:34 -0600 | [diff] [blame] | 220 | doing, val ?: "", param); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | return ret; |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | /* All parsed OK. */ |
| 226 | return 0; |
| 227 | } |
| 228 | |
| 229 | /* Lazy bastard, eh? */ |
Felipe Contreras | 88a88b32 | 2013-12-04 14:09:38 +1030 | [diff] [blame] | 230 | #define STANDARD_PARAM_DEF(name, type, format, strtolfn) \ |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 231 | int param_set_##name(const char *val, const struct kernel_param *kp) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | { \ |
Felipe Contreras | 88a88b32 | 2013-12-04 14:09:38 +1030 | [diff] [blame] | 233 | return strtolfn(val, 0, (type *)kp->arg); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | } \ |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 235 | int param_get_##name(char *buffer, const struct kernel_param *kp) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | { \ |
Chen Gang | f4940ab | 2013-08-20 15:35:04 +0930 | [diff] [blame] | 237 | return scnprintf(buffer, PAGE_SIZE, format, \ |
| 238 | *((type *)kp->arg)); \ |
Rusty Russell | a14fe24 | 2010-08-11 23:04:11 -0600 | [diff] [blame] | 239 | } \ |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 240 | struct kernel_param_ops param_ops_##name = { \ |
| 241 | .set = param_set_##name, \ |
| 242 | .get = param_get_##name, \ |
| 243 | }; \ |
Rusty Russell | a14fe24 | 2010-08-11 23:04:11 -0600 | [diff] [blame] | 244 | EXPORT_SYMBOL(param_set_##name); \ |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 245 | EXPORT_SYMBOL(param_get_##name); \ |
| 246 | EXPORT_SYMBOL(param_ops_##name) |
| 247 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | |
Felipe Contreras | 88a88b32 | 2013-12-04 14:09:38 +1030 | [diff] [blame] | 249 | STANDARD_PARAM_DEF(byte, unsigned char, "%hhu", kstrtou8); |
| 250 | STANDARD_PARAM_DEF(short, short, "%hi", kstrtos16); |
| 251 | STANDARD_PARAM_DEF(ushort, unsigned short, "%hu", kstrtou16); |
| 252 | STANDARD_PARAM_DEF(int, int, "%i", kstrtoint); |
| 253 | STANDARD_PARAM_DEF(uint, unsigned int, "%u", kstrtouint); |
| 254 | STANDARD_PARAM_DEF(long, long, "%li", kstrtol); |
| 255 | STANDARD_PARAM_DEF(ulong, unsigned long, "%lu", kstrtoul); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 257 | int param_set_charp(const char *val, const struct kernel_param *kp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | if (strlen(val) > 1024) { |
Jim Cromie | b5f3abf | 2012-05-03 18:22:44 -0600 | [diff] [blame] | 260 | pr_err("%s: string parameter too long\n", kp->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | return -ENOSPC; |
| 262 | } |
| 263 | |
Rusty Russell | a105432 | 2010-08-11 23:04:18 -0600 | [diff] [blame] | 264 | maybe_kfree_parameter(*(char **)kp->arg); |
| 265 | |
| 266 | /* This is a hack. We can't kmalloc in early boot, and we |
Rusty Russell | e180a6b | 2009-03-31 13:05:29 -0600 | [diff] [blame] | 267 | * don't need to; this mangled commandline is preserved. */ |
| 268 | if (slab_is_available()) { |
Rusty Russell | a105432 | 2010-08-11 23:04:18 -0600 | [diff] [blame] | 269 | *(char **)kp->arg = kmalloc_parameter(strlen(val)+1); |
Rusty Russell | d553ad8 | 2009-10-29 08:56:17 -0600 | [diff] [blame] | 270 | if (!*(char **)kp->arg) |
Rusty Russell | e180a6b | 2009-03-31 13:05:29 -0600 | [diff] [blame] | 271 | return -ENOMEM; |
Rusty Russell | a105432 | 2010-08-11 23:04:18 -0600 | [diff] [blame] | 272 | strcpy(*(char **)kp->arg, val); |
Rusty Russell | e180a6b | 2009-03-31 13:05:29 -0600 | [diff] [blame] | 273 | } else |
| 274 | *(const char **)kp->arg = val; |
| 275 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | return 0; |
| 277 | } |
Rusty Russell | a14fe24 | 2010-08-11 23:04:11 -0600 | [diff] [blame] | 278 | EXPORT_SYMBOL(param_set_charp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 280 | int param_get_charp(char *buffer, const struct kernel_param *kp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | { |
Chen Gang | f4940ab | 2013-08-20 15:35:04 +0930 | [diff] [blame] | 282 | return scnprintf(buffer, PAGE_SIZE, "%s", *((char **)kp->arg)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | } |
Rusty Russell | a14fe24 | 2010-08-11 23:04:11 -0600 | [diff] [blame] | 284 | EXPORT_SYMBOL(param_get_charp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | |
Rusty Russell | a105432 | 2010-08-11 23:04:18 -0600 | [diff] [blame] | 286 | static void param_free_charp(void *arg) |
| 287 | { |
| 288 | maybe_kfree_parameter(*((char **)arg)); |
| 289 | } |
| 290 | |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 291 | struct kernel_param_ops param_ops_charp = { |
| 292 | .set = param_set_charp, |
| 293 | .get = param_get_charp, |
Rusty Russell | a105432 | 2010-08-11 23:04:18 -0600 | [diff] [blame] | 294 | .free = param_free_charp, |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 295 | }; |
| 296 | EXPORT_SYMBOL(param_ops_charp); |
| 297 | |
Rusty Russell | fddd520 | 2009-06-12 21:46:57 -0600 | [diff] [blame] | 298 | /* Actually could be a bool or an int, for historical reasons. */ |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 299 | int param_set_bool(const char *val, const struct kernel_param *kp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | { |
| 301 | /* No equals means "set"... */ |
| 302 | if (!val) val = "1"; |
| 303 | |
| 304 | /* One of =[yYnN01] */ |
Rusty Russell | 8b825281 | 2012-03-26 12:50:51 +1030 | [diff] [blame] | 305 | return strtobool(val, kp->arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | } |
Rusty Russell | a14fe24 | 2010-08-11 23:04:11 -0600 | [diff] [blame] | 307 | EXPORT_SYMBOL(param_set_bool); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 309 | int param_get_bool(char *buffer, const struct kernel_param *kp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | { |
| 311 | /* Y and N chosen as being relatively non-coder friendly */ |
Rusty Russell | 8b825281 | 2012-03-26 12:50:51 +1030 | [diff] [blame] | 312 | return sprintf(buffer, "%c", *(bool *)kp->arg ? 'Y' : 'N'); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | } |
Rusty Russell | a14fe24 | 2010-08-11 23:04:11 -0600 | [diff] [blame] | 314 | EXPORT_SYMBOL(param_get_bool); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 316 | struct kernel_param_ops param_ops_bool = { |
Steven Rostedt | ab013c5 | 2013-08-20 15:33:19 +0930 | [diff] [blame] | 317 | .flags = KERNEL_PARAM_FL_NOARG, |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 318 | .set = param_set_bool, |
| 319 | .get = param_get_bool, |
| 320 | }; |
| 321 | EXPORT_SYMBOL(param_ops_bool); |
| 322 | |
Rusty Russell | fddd520 | 2009-06-12 21:46:57 -0600 | [diff] [blame] | 323 | /* This one must be bool. */ |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 324 | int param_set_invbool(const char *val, const struct kernel_param *kp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | { |
Rusty Russell | fddd520 | 2009-06-12 21:46:57 -0600 | [diff] [blame] | 326 | int ret; |
| 327 | bool boolval; |
Jan Beulich | 22e48ea | 2007-10-16 23:29:34 -0700 | [diff] [blame] | 328 | struct kernel_param dummy; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | |
Jan Beulich | 22e48ea | 2007-10-16 23:29:34 -0700 | [diff] [blame] | 330 | dummy.arg = &boolval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | ret = param_set_bool(val, &dummy); |
| 332 | if (ret == 0) |
Rusty Russell | 9a71af2 | 2009-06-12 21:46:53 -0600 | [diff] [blame] | 333 | *(bool *)kp->arg = !boolval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | return ret; |
| 335 | } |
Rusty Russell | a14fe24 | 2010-08-11 23:04:11 -0600 | [diff] [blame] | 336 | EXPORT_SYMBOL(param_set_invbool); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 338 | int param_get_invbool(char *buffer, const struct kernel_param *kp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | { |
Rusty Russell | 9a71af2 | 2009-06-12 21:46:53 -0600 | [diff] [blame] | 340 | return sprintf(buffer, "%c", (*(bool *)kp->arg) ? 'N' : 'Y'); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | } |
Rusty Russell | a14fe24 | 2010-08-11 23:04:11 -0600 | [diff] [blame] | 342 | EXPORT_SYMBOL(param_get_invbool); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 344 | struct kernel_param_ops param_ops_invbool = { |
| 345 | .set = param_set_invbool, |
| 346 | .get = param_get_invbool, |
| 347 | }; |
| 348 | EXPORT_SYMBOL(param_ops_invbool); |
| 349 | |
Rusty Russell | 69116f2 | 2012-01-13 09:32:17 +1030 | [diff] [blame] | 350 | int param_set_bint(const char *val, const struct kernel_param *kp) |
| 351 | { |
| 352 | struct kernel_param boolkp; |
| 353 | bool v; |
| 354 | int ret; |
| 355 | |
| 356 | /* Match bool exactly, by re-using it. */ |
| 357 | boolkp = *kp; |
| 358 | boolkp.arg = &v; |
Rusty Russell | 69116f2 | 2012-01-13 09:32:17 +1030 | [diff] [blame] | 359 | |
| 360 | ret = param_set_bool(val, &boolkp); |
| 361 | if (ret == 0) |
| 362 | *(int *)kp->arg = v; |
| 363 | return ret; |
| 364 | } |
| 365 | EXPORT_SYMBOL(param_set_bint); |
| 366 | |
| 367 | struct kernel_param_ops param_ops_bint = { |
Steven Rostedt | ab013c5 | 2013-08-20 15:33:19 +0930 | [diff] [blame] | 368 | .flags = KERNEL_PARAM_FL_NOARG, |
Rusty Russell | 69116f2 | 2012-01-13 09:32:17 +1030 | [diff] [blame] | 369 | .set = param_set_bint, |
| 370 | .get = param_get_int, |
| 371 | }; |
| 372 | EXPORT_SYMBOL(param_ops_bint); |
| 373 | |
Bert Wesarg | 9730b5b | 2007-05-08 00:28:50 -0700 | [diff] [blame] | 374 | /* We break the rule and mangle the string. */ |
Adrian Bunk | 9871728 | 2006-03-25 03:07:06 -0800 | [diff] [blame] | 375 | static int param_array(const char *name, |
| 376 | const char *val, |
| 377 | unsigned int min, unsigned int max, |
| 378 | void *elem, int elemsize, |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 379 | int (*set)(const char *, const struct kernel_param *kp), |
Pawel Moll | 026cee0 | 2012-03-26 12:50:51 +1030 | [diff] [blame] | 380 | s16 level, |
Richard Knutsson | eb38a99 | 2008-02-06 01:37:50 -0800 | [diff] [blame] | 381 | unsigned int *num) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | { |
| 383 | int ret; |
| 384 | struct kernel_param kp; |
| 385 | char save; |
| 386 | |
| 387 | /* Get the name right for errors. */ |
| 388 | kp.name = name; |
| 389 | kp.arg = elem; |
Pawel Moll | 026cee0 | 2012-03-26 12:50:51 +1030 | [diff] [blame] | 390 | kp.level = level; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | *num = 0; |
| 393 | /* We expect a comma-separated list of values. */ |
| 394 | do { |
| 395 | int len; |
| 396 | |
| 397 | if (*num == max) { |
Jim Cromie | b5f3abf | 2012-05-03 18:22:44 -0600 | [diff] [blame] | 398 | pr_err("%s: can only take %i arguments\n", name, max); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | return -EINVAL; |
| 400 | } |
| 401 | len = strcspn(val, ","); |
| 402 | |
| 403 | /* nul-terminate and parse */ |
| 404 | save = val[len]; |
| 405 | ((char *)val)[len] = '\0'; |
Rusty Russell | 907b29e | 2010-08-11 23:04:19 -0600 | [diff] [blame] | 406 | BUG_ON(!mutex_is_locked(¶m_lock)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | ret = set(val, &kp); |
| 408 | |
| 409 | if (ret != 0) |
| 410 | return ret; |
| 411 | kp.arg += elemsize; |
| 412 | val += len+1; |
| 413 | (*num)++; |
| 414 | } while (save == ','); |
| 415 | |
| 416 | if (*num < min) { |
Jim Cromie | b5f3abf | 2012-05-03 18:22:44 -0600 | [diff] [blame] | 417 | pr_err("%s: needs at least %i arguments\n", name, min); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | return -EINVAL; |
| 419 | } |
| 420 | return 0; |
| 421 | } |
| 422 | |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 423 | static int param_array_set(const char *val, const struct kernel_param *kp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | { |
Jan Beulich | 22e48ea | 2007-10-16 23:29:34 -0700 | [diff] [blame] | 425 | const struct kparam_array *arr = kp->arr; |
Bert Wesarg | 31143a1 | 2005-04-16 15:25:42 -0700 | [diff] [blame] | 426 | unsigned int temp_num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | |
| 428 | return param_array(kp->name, val, 1, arr->max, arr->elem, |
Pawel Moll | 026cee0 | 2012-03-26 12:50:51 +1030 | [diff] [blame] | 429 | arr->elemsize, arr->ops->set, kp->level, |
Rusty Russell | 3c7d76e | 2009-10-29 08:56:19 -0600 | [diff] [blame] | 430 | arr->num ?: &temp_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | } |
| 432 | |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 433 | static int param_array_get(char *buffer, const struct kernel_param *kp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | { |
| 435 | int i, off, ret; |
Jan Beulich | 22e48ea | 2007-10-16 23:29:34 -0700 | [diff] [blame] | 436 | const struct kparam_array *arr = kp->arr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | struct kernel_param p; |
| 438 | |
| 439 | p = *kp; |
| 440 | for (i = off = 0; i < (arr->num ? *arr->num : arr->max); i++) { |
| 441 | if (i) |
| 442 | buffer[off++] = ','; |
| 443 | p.arg = arr->elem + arr->elemsize * i; |
Rusty Russell | 907b29e | 2010-08-11 23:04:19 -0600 | [diff] [blame] | 444 | BUG_ON(!mutex_is_locked(¶m_lock)); |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 445 | ret = arr->ops->get(buffer + off, &p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | if (ret < 0) |
| 447 | return ret; |
| 448 | off += ret; |
| 449 | } |
| 450 | buffer[off] = '\0'; |
| 451 | return off; |
| 452 | } |
| 453 | |
Rusty Russell | e6df34a | 2010-08-11 23:04:17 -0600 | [diff] [blame] | 454 | static void param_array_free(void *arg) |
| 455 | { |
| 456 | unsigned int i; |
| 457 | const struct kparam_array *arr = arg; |
| 458 | |
| 459 | if (arr->ops->free) |
| 460 | for (i = 0; i < (arr->num ? *arr->num : arr->max); i++) |
| 461 | arr->ops->free(arr->elem + arr->elemsize * i); |
| 462 | } |
| 463 | |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 464 | struct kernel_param_ops param_array_ops = { |
| 465 | .set = param_array_set, |
| 466 | .get = param_array_get, |
Rusty Russell | e6df34a | 2010-08-11 23:04:17 -0600 | [diff] [blame] | 467 | .free = param_array_free, |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 468 | }; |
| 469 | EXPORT_SYMBOL(param_array_ops); |
| 470 | |
| 471 | int param_set_copystring(const char *val, const struct kernel_param *kp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | { |
Jan Beulich | 22e48ea | 2007-10-16 23:29:34 -0700 | [diff] [blame] | 473 | const struct kparam_string *kps = kp->str; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | |
| 475 | if (strlen(val)+1 > kps->maxlen) { |
Jim Cromie | b5f3abf | 2012-05-03 18:22:44 -0600 | [diff] [blame] | 476 | pr_err("%s: string doesn't fit in %u chars.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | kp->name, kps->maxlen-1); |
| 478 | return -ENOSPC; |
| 479 | } |
| 480 | strcpy(kps->string, val); |
| 481 | return 0; |
| 482 | } |
Rusty Russell | a14fe24 | 2010-08-11 23:04:11 -0600 | [diff] [blame] | 483 | EXPORT_SYMBOL(param_set_copystring); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 485 | int param_get_string(char *buffer, const struct kernel_param *kp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | { |
Jan Beulich | 22e48ea | 2007-10-16 23:29:34 -0700 | [diff] [blame] | 487 | const struct kparam_string *kps = kp->str; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | return strlcpy(buffer, kps->string, kps->maxlen); |
| 489 | } |
Rusty Russell | a14fe24 | 2010-08-11 23:04:11 -0600 | [diff] [blame] | 490 | EXPORT_SYMBOL(param_get_string); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 492 | struct kernel_param_ops param_ops_string = { |
| 493 | .set = param_set_copystring, |
| 494 | .get = param_get_string, |
| 495 | }; |
| 496 | EXPORT_SYMBOL(param_ops_string); |
| 497 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | /* sysfs output in /sys/modules/XYZ/parameters/ */ |
Edward Z. Yang | 350f825 | 2010-02-01 18:26:59 -0500 | [diff] [blame] | 499 | #define to_module_attr(n) container_of(n, struct module_attribute, attr) |
| 500 | #define to_module_kobject(n) container_of(n, struct module_kobject, kobj) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | |
| 502 | extern struct kernel_param __start___param[], __stop___param[]; |
| 503 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | struct param_attribute |
| 505 | { |
| 506 | struct module_attribute mattr; |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 507 | const struct kernel_param *param; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | }; |
| 509 | |
| 510 | struct module_param_attrs |
| 511 | { |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 512 | unsigned int num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | struct attribute_group grp; |
| 514 | struct param_attribute attrs[0]; |
| 515 | }; |
| 516 | |
Randy Dunlap | ef665c1 | 2007-02-13 15:19:06 -0800 | [diff] [blame] | 517 | #ifdef CONFIG_SYSFS |
Edward Z. Yang | 350f825 | 2010-02-01 18:26:59 -0500 | [diff] [blame] | 518 | #define to_param_attr(n) container_of(n, struct param_attribute, mattr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | |
| 520 | static ssize_t param_attr_show(struct module_attribute *mattr, |
Kay Sievers | 4befb02 | 2011-07-24 22:06:04 +0930 | [diff] [blame] | 521 | struct module_kobject *mk, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | { |
| 523 | int count; |
| 524 | struct param_attribute *attribute = to_param_attr(mattr); |
| 525 | |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 526 | if (!attribute->param->ops->get) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | return -EPERM; |
| 528 | |
Rusty Russell | 907b29e | 2010-08-11 23:04:19 -0600 | [diff] [blame] | 529 | mutex_lock(¶m_lock); |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 530 | count = attribute->param->ops->get(buf, attribute->param); |
Rusty Russell | 907b29e | 2010-08-11 23:04:19 -0600 | [diff] [blame] | 531 | mutex_unlock(¶m_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | if (count > 0) { |
| 533 | strcat(buf, "\n"); |
| 534 | ++count; |
| 535 | } |
| 536 | return count; |
| 537 | } |
| 538 | |
| 539 | /* sysfs always hands a nul-terminated string in buf. We rely on that. */ |
| 540 | static ssize_t param_attr_store(struct module_attribute *mattr, |
Kay Sievers | 4befb02 | 2011-07-24 22:06:04 +0930 | [diff] [blame] | 541 | struct module_kobject *km, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | const char *buf, size_t len) |
| 543 | { |
| 544 | int err; |
| 545 | struct param_attribute *attribute = to_param_attr(mattr); |
| 546 | |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 547 | if (!attribute->param->ops->set) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | return -EPERM; |
| 549 | |
Rusty Russell | 907b29e | 2010-08-11 23:04:19 -0600 | [diff] [blame] | 550 | mutex_lock(¶m_lock); |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 551 | err = attribute->param->ops->set(buf, attribute->param); |
Rusty Russell | 907b29e | 2010-08-11 23:04:19 -0600 | [diff] [blame] | 552 | mutex_unlock(¶m_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | if (!err) |
| 554 | return len; |
| 555 | return err; |
| 556 | } |
Randy Dunlap | ef665c1 | 2007-02-13 15:19:06 -0800 | [diff] [blame] | 557 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | |
| 559 | #ifdef CONFIG_MODULES |
| 560 | #define __modinit |
| 561 | #else |
| 562 | #define __modinit __init |
| 563 | #endif |
| 564 | |
Randy Dunlap | ef665c1 | 2007-02-13 15:19:06 -0800 | [diff] [blame] | 565 | #ifdef CONFIG_SYSFS |
Rusty Russell | 907b29e | 2010-08-11 23:04:19 -0600 | [diff] [blame] | 566 | void __kernel_param_lock(void) |
| 567 | { |
| 568 | mutex_lock(¶m_lock); |
| 569 | } |
| 570 | EXPORT_SYMBOL(__kernel_param_lock); |
| 571 | |
| 572 | void __kernel_param_unlock(void) |
| 573 | { |
| 574 | mutex_unlock(¶m_lock); |
| 575 | } |
| 576 | EXPORT_SYMBOL(__kernel_param_unlock); |
| 577 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | /* |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 579 | * add_sysfs_param - add a parameter to sysfs |
| 580 | * @mk: struct module_kobject |
| 581 | * @kparam: the actual parameter definition to add to sysfs |
| 582 | * @name: name of parameter |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | * |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 584 | * Create a kobject if for a (per-module) parameter if mp NULL, and |
| 585 | * create file in sysfs. Returns an error on out of memory. Always cleans up |
| 586 | * if there's an error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | */ |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 588 | static __modinit int add_sysfs_param(struct module_kobject *mk, |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 589 | const struct kernel_param *kp, |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 590 | const char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | { |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 592 | struct module_param_attrs *new; |
| 593 | struct attribute **attrs; |
| 594 | int err, num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 596 | /* We don't bother calling this with invisible parameters. */ |
| 597 | BUG_ON(!kp->perm); |
| 598 | |
| 599 | if (!mk->mp) { |
| 600 | num = 0; |
| 601 | attrs = NULL; |
| 602 | } else { |
| 603 | num = mk->mp->num; |
| 604 | attrs = mk->mp->grp.attrs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | } |
| 606 | |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 607 | /* Enlarge. */ |
| 608 | new = krealloc(mk->mp, |
| 609 | sizeof(*mk->mp) + sizeof(mk->mp->attrs[0]) * (num+1), |
| 610 | GFP_KERNEL); |
| 611 | if (!new) { |
David Woodhouse | 63662139 | 2013-03-14 13:23:11 +0000 | [diff] [blame] | 612 | kfree(attrs); |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 613 | err = -ENOMEM; |
| 614 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | } |
David Woodhouse | 63662139 | 2013-03-14 13:23:11 +0000 | [diff] [blame] | 616 | /* Despite looking like the typical realloc() bug, this is safe. |
| 617 | * We *want* the old 'attrs' to be freed either way, and we'll store |
| 618 | * the new one in the success case. */ |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 619 | attrs = krealloc(attrs, sizeof(new->grp.attrs[0])*(num+2), GFP_KERNEL); |
| 620 | if (!attrs) { |
| 621 | err = -ENOMEM; |
| 622 | goto fail_free_new; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | } |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 624 | |
| 625 | /* Sysfs wants everything zeroed. */ |
| 626 | memset(new, 0, sizeof(*new)); |
| 627 | memset(&new->attrs[num], 0, sizeof(new->attrs[num])); |
| 628 | memset(&attrs[num], 0, sizeof(attrs[num])); |
| 629 | new->grp.name = "parameters"; |
| 630 | new->grp.attrs = attrs; |
| 631 | |
| 632 | /* Tack new one on the end. */ |
Eric W. Biederman | a07e415 | 2010-02-11 15:23:05 -0800 | [diff] [blame] | 633 | sysfs_attr_init(&new->attrs[num].mattr.attr); |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 634 | new->attrs[num].param = kp; |
| 635 | new->attrs[num].mattr.show = param_attr_show; |
| 636 | new->attrs[num].mattr.store = param_attr_store; |
| 637 | new->attrs[num].mattr.attr.name = (char *)name; |
| 638 | new->attrs[num].mattr.attr.mode = kp->perm; |
| 639 | new->num = num+1; |
| 640 | |
| 641 | /* Fix up all the pointers, since krealloc can move us */ |
| 642 | for (num = 0; num < new->num; num++) |
| 643 | new->grp.attrs[num] = &new->attrs[num].mattr.attr; |
| 644 | new->grp.attrs[num] = NULL; |
| 645 | |
| 646 | mk->mp = new; |
| 647 | return 0; |
| 648 | |
| 649 | fail_free_new: |
| 650 | kfree(new); |
| 651 | fail: |
| 652 | mk->mp = NULL; |
| 653 | return err; |
| 654 | } |
| 655 | |
Linus Torvalds | d244118 | 2008-10-23 12:07:17 -0700 | [diff] [blame] | 656 | #ifdef CONFIG_MODULES |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 657 | static void free_module_param_attrs(struct module_kobject *mk) |
| 658 | { |
| 659 | kfree(mk->mp->grp.attrs); |
| 660 | kfree(mk->mp); |
| 661 | mk->mp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | } |
| 663 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | /* |
| 665 | * module_param_sysfs_setup - setup sysfs support for one module |
| 666 | * @mod: module |
| 667 | * @kparam: module parameters (array) |
| 668 | * @num_params: number of module parameters |
| 669 | * |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 670 | * Adds sysfs entries for module parameters under |
| 671 | * /sys/module/[mod->name]/parameters/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | */ |
| 673 | int module_param_sysfs_setup(struct module *mod, |
Rusty Russell | 9bbb9e5 | 2010-08-11 23:04:12 -0600 | [diff] [blame] | 674 | const struct kernel_param *kparam, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | unsigned int num_params) |
| 676 | { |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 677 | int i, err; |
| 678 | bool params = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 680 | for (i = 0; i < num_params; i++) { |
| 681 | if (kparam[i].perm == 0) |
| 682 | continue; |
| 683 | err = add_sysfs_param(&mod->mkobj, &kparam[i], kparam[i].name); |
| 684 | if (err) |
| 685 | return err; |
| 686 | params = true; |
| 687 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 689 | if (!params) |
| 690 | return 0; |
| 691 | |
| 692 | /* Create the param group. */ |
| 693 | err = sysfs_create_group(&mod->mkobj.kobj, &mod->mkobj.mp->grp); |
| 694 | if (err) |
| 695 | free_module_param_attrs(&mod->mkobj); |
| 696 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | } |
| 698 | |
| 699 | /* |
| 700 | * module_param_sysfs_remove - remove sysfs support for one module |
| 701 | * @mod: module |
| 702 | * |
| 703 | * Remove sysfs entries for module parameters and the corresponding |
| 704 | * kobject. |
| 705 | */ |
| 706 | void module_param_sysfs_remove(struct module *mod) |
| 707 | { |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 708 | if (mod->mkobj.mp) { |
| 709 | sysfs_remove_group(&mod->mkobj.kobj, &mod->mkobj.mp->grp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | /* We are positive that no one is using any param |
| 711 | * attrs at this point. Deallocate immediately. */ |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 712 | free_module_param_attrs(&mod->mkobj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | } |
| 714 | } |
| 715 | #endif |
| 716 | |
Rusty Russell | e180a6b | 2009-03-31 13:05:29 -0600 | [diff] [blame] | 717 | void destroy_params(const struct kernel_param *params, unsigned num) |
| 718 | { |
Rusty Russell | e6df34a | 2010-08-11 23:04:17 -0600 | [diff] [blame] | 719 | unsigned int i; |
| 720 | |
| 721 | for (i = 0; i < num; i++) |
| 722 | if (params[i].ops->free) |
| 723 | params[i].ops->free(params[i].arg); |
Rusty Russell | e180a6b | 2009-03-31 13:05:29 -0600 | [diff] [blame] | 724 | } |
| 725 | |
Dmitry Torokhov | e94965e | 2010-12-15 14:00:19 -0800 | [diff] [blame] | 726 | static struct module_kobject * __init locate_module_kobject(const char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | { |
| 728 | struct module_kobject *mk; |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 729 | struct kobject *kobj; |
| 730 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 732 | kobj = kset_find_obj(module_kset, name); |
| 733 | if (kobj) { |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 734 | mk = to_module_kobject(kobj); |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 735 | } else { |
| 736 | mk = kzalloc(sizeof(struct module_kobject), GFP_KERNEL); |
| 737 | BUG_ON(!mk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 739 | mk->mod = THIS_MODULE; |
| 740 | mk->kobj.kset = module_kset; |
| 741 | err = kobject_init_and_add(&mk->kobj, &module_ktype, NULL, |
| 742 | "%s", name); |
Kay Sievers | 88bfa32 | 2011-07-24 22:06:04 +0930 | [diff] [blame] | 743 | #ifdef CONFIG_MODULES |
| 744 | if (!err) |
| 745 | err = sysfs_create_file(&mk->kobj, &module_uevent.attr); |
| 746 | #endif |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 747 | if (err) { |
| 748 | kobject_put(&mk->kobj); |
Jim Cromie | b5f3abf | 2012-05-03 18:22:44 -0600 | [diff] [blame] | 749 | pr_crit("Adding module '%s' to sysfs failed (%d), the system may be unstable.\n", |
Dmitry Torokhov | e94965e | 2010-12-15 14:00:19 -0800 | [diff] [blame] | 750 | name, err); |
Dmitry Torokhov | e94965e | 2010-12-15 14:00:19 -0800 | [diff] [blame] | 751 | return NULL; |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 752 | } |
Dmitry Torokhov | e94965e | 2010-12-15 14:00:19 -0800 | [diff] [blame] | 753 | |
| 754 | /* So that we hold reference in both cases. */ |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 755 | kobject_get(&mk->kobj); |
Greg Kroah-Hartman | 74c5b59 | 2007-07-30 11:26:38 -0700 | [diff] [blame] | 756 | } |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 757 | |
Dmitry Torokhov | e94965e | 2010-12-15 14:00:19 -0800 | [diff] [blame] | 758 | return mk; |
| 759 | } |
| 760 | |
| 761 | static void __init kernel_add_sysfs_param(const char *name, |
| 762 | struct kernel_param *kparam, |
| 763 | unsigned int name_skip) |
| 764 | { |
| 765 | struct module_kobject *mk; |
| 766 | int err; |
| 767 | |
| 768 | mk = locate_module_kobject(name); |
| 769 | if (!mk) |
| 770 | return; |
| 771 | |
| 772 | /* We need to remove old parameters before adding more. */ |
| 773 | if (mk->mp) |
| 774 | sysfs_remove_group(&mk->kobj, &mk->mp->grp); |
| 775 | |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 776 | /* These should not fail at boot. */ |
| 777 | err = add_sysfs_param(mk, kparam, kparam->name + name_skip); |
| 778 | BUG_ON(err); |
| 779 | err = sysfs_create_group(&mk->kobj, &mk->mp->grp); |
| 780 | BUG_ON(err); |
Kay Sievers | f30c53a | 2007-01-15 20:22:02 +0100 | [diff] [blame] | 781 | kobject_uevent(&mk->kobj, KOBJ_ADD); |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 782 | kobject_put(&mk->kobj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | } |
| 784 | |
| 785 | /* |
Jean Delvare | b634d13 | 2013-07-02 15:35:11 +0930 | [diff] [blame] | 786 | * param_sysfs_builtin - add sysfs parameters for built-in modules |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | * |
| 788 | * Add module_parameters to sysfs for "modules" built into the kernel. |
| 789 | * |
| 790 | * The "module" name (KBUILD_MODNAME) is stored before a dot, the |
| 791 | * "parameter" name is stored behind a dot in kernel_param->name. So, |
| 792 | * extract the "module" name for all built-in kernel_param-eters, |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 793 | * and for all who have the same, call kernel_add_sysfs_param. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | */ |
| 795 | static void __init param_sysfs_builtin(void) |
| 796 | { |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 797 | struct kernel_param *kp; |
| 798 | unsigned int name_len; |
| 799 | char modname[MODULE_NAME_LEN]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 801 | for (kp = __start___param; kp < __stop___param; kp++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | char *dot; |
| 803 | |
Rusty Russell | 9b473de | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 804 | if (kp->perm == 0) |
| 805 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | |
Rusty Russell | 730b69d | 2008-10-22 10:00:22 -0500 | [diff] [blame] | 807 | dot = strchr(kp->name, '.'); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | if (!dot) { |
Rusty Russell | 67e67ce | 2008-10-22 10:00:23 -0500 | [diff] [blame] | 809 | /* This happens for core_param() */ |
| 810 | strcpy(modname, "kernel"); |
| 811 | name_len = 0; |
| 812 | } else { |
| 813 | name_len = dot - kp->name + 1; |
| 814 | strlcpy(modname, kp->name, name_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | } |
Rusty Russell | 67e67ce | 2008-10-22 10:00:23 -0500 | [diff] [blame] | 816 | kernel_add_sysfs_param(modname, kp, name_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | } |
| 819 | |
Dmitry Torokhov | e94965e | 2010-12-15 14:00:19 -0800 | [diff] [blame] | 820 | ssize_t __modver_version_show(struct module_attribute *mattr, |
Kay Sievers | 4befb02 | 2011-07-24 22:06:04 +0930 | [diff] [blame] | 821 | struct module_kobject *mk, char *buf) |
Dmitry Torokhov | e94965e | 2010-12-15 14:00:19 -0800 | [diff] [blame] | 822 | { |
| 823 | struct module_version_attribute *vattr = |
| 824 | container_of(mattr, struct module_version_attribute, mattr); |
| 825 | |
Chen Gang | f4940ab | 2013-08-20 15:35:04 +0930 | [diff] [blame] | 826 | return scnprintf(buf, PAGE_SIZE, "%s\n", vattr->version); |
Dmitry Torokhov | e94965e | 2010-12-15 14:00:19 -0800 | [diff] [blame] | 827 | } |
| 828 | |
Dmitry Torokhov | b4bc8428 | 2011-02-07 16:02:25 -0800 | [diff] [blame] | 829 | extern const struct module_version_attribute *__start___modver[]; |
| 830 | extern const struct module_version_attribute *__stop___modver[]; |
Dmitry Torokhov | e94965e | 2010-12-15 14:00:19 -0800 | [diff] [blame] | 831 | |
| 832 | static void __init version_sysfs_builtin(void) |
| 833 | { |
Dmitry Torokhov | b4bc8428 | 2011-02-07 16:02:25 -0800 | [diff] [blame] | 834 | const struct module_version_attribute **p; |
Dmitry Torokhov | e94965e | 2010-12-15 14:00:19 -0800 | [diff] [blame] | 835 | struct module_kobject *mk; |
| 836 | int err; |
| 837 | |
Dmitry Torokhov | b4bc8428 | 2011-02-07 16:02:25 -0800 | [diff] [blame] | 838 | for (p = __start___modver; p < __stop___modver; p++) { |
| 839 | const struct module_version_attribute *vattr = *p; |
| 840 | |
Dmitry Torokhov | e94965e | 2010-12-15 14:00:19 -0800 | [diff] [blame] | 841 | mk = locate_module_kobject(vattr->module_name); |
| 842 | if (mk) { |
| 843 | err = sysfs_create_file(&mk->kobj, &vattr->mattr.attr); |
| 844 | kobject_uevent(&mk->kobj, KOBJ_ADD); |
| 845 | kobject_put(&mk->kobj); |
| 846 | } |
| 847 | } |
| 848 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | |
| 850 | /* module-related sysfs stuff */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | static ssize_t module_attr_show(struct kobject *kobj, |
| 853 | struct attribute *attr, |
| 854 | char *buf) |
| 855 | { |
| 856 | struct module_attribute *attribute; |
| 857 | struct module_kobject *mk; |
| 858 | int ret; |
| 859 | |
| 860 | attribute = to_module_attr(attr); |
| 861 | mk = to_module_kobject(kobj); |
| 862 | |
| 863 | if (!attribute->show) |
Dmitry Torokhov | 70f2817 | 2005-04-29 01:27:34 -0500 | [diff] [blame] | 864 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | |
Kay Sievers | 4befb02 | 2011-07-24 22:06:04 +0930 | [diff] [blame] | 866 | ret = attribute->show(attribute, mk, buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | return ret; |
| 869 | } |
| 870 | |
| 871 | static ssize_t module_attr_store(struct kobject *kobj, |
| 872 | struct attribute *attr, |
| 873 | const char *buf, size_t len) |
| 874 | { |
| 875 | struct module_attribute *attribute; |
| 876 | struct module_kobject *mk; |
| 877 | int ret; |
| 878 | |
| 879 | attribute = to_module_attr(attr); |
| 880 | mk = to_module_kobject(kobj); |
| 881 | |
| 882 | if (!attribute->store) |
Dmitry Torokhov | 70f2817 | 2005-04-29 01:27:34 -0500 | [diff] [blame] | 883 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | |
Kay Sievers | 4befb02 | 2011-07-24 22:06:04 +0930 | [diff] [blame] | 885 | ret = attribute->store(attribute, mk, buf, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | return ret; |
| 888 | } |
| 889 | |
Emese Revfy | 52cf25d | 2010-01-19 02:58:23 +0100 | [diff] [blame] | 890 | static const struct sysfs_ops module_sysfs_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | .show = module_attr_show, |
| 892 | .store = module_attr_store, |
| 893 | }; |
| 894 | |
Kay Sievers | 270a6c4 | 2007-01-18 13:26:15 +0100 | [diff] [blame] | 895 | static int uevent_filter(struct kset *kset, struct kobject *kobj) |
| 896 | { |
| 897 | struct kobj_type *ktype = get_ktype(kobj); |
| 898 | |
| 899 | if (ktype == &module_ktype) |
| 900 | return 1; |
| 901 | return 0; |
| 902 | } |
| 903 | |
Emese Revfy | 9cd4361 | 2009-12-31 14:52:51 +0100 | [diff] [blame] | 904 | static const struct kset_uevent_ops module_uevent_ops = { |
Kay Sievers | 270a6c4 | 2007-01-18 13:26:15 +0100 | [diff] [blame] | 905 | .filter = uevent_filter, |
| 906 | }; |
| 907 | |
Greg Kroah-Hartman | 7405c1e | 2007-11-01 10:39:50 -0700 | [diff] [blame] | 908 | struct kset *module_kset; |
Greg Kroah-Hartman | 823bccf | 2007-04-13 13:15:19 -0700 | [diff] [blame] | 909 | int module_sysfs_initialized; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | |
Li Zhong | 942e443 | 2013-09-03 16:33:57 +0930 | [diff] [blame] | 911 | static void module_kobj_release(struct kobject *kobj) |
| 912 | { |
| 913 | struct module_kobject *mk = to_module_kobject(kobj); |
| 914 | complete(mk->kobj_completion); |
| 915 | } |
| 916 | |
Greg Kroah-Hartman | 7405c1e | 2007-11-01 10:39:50 -0700 | [diff] [blame] | 917 | struct kobj_type module_ktype = { |
Li Zhong | 942e443 | 2013-09-03 16:33:57 +0930 | [diff] [blame] | 918 | .release = module_kobj_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | .sysfs_ops = &module_sysfs_ops, |
| 920 | }; |
| 921 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | /* |
| 923 | * param_sysfs_init - wrapper for built-in params support |
| 924 | */ |
| 925 | static int __init param_sysfs_init(void) |
| 926 | { |
Greg Kroah-Hartman | 7405c1e | 2007-11-01 10:39:50 -0700 | [diff] [blame] | 927 | module_kset = kset_create_and_add("module", &module_uevent_ops, NULL); |
| 928 | if (!module_kset) { |
| 929 | printk(KERN_WARNING "%s (%d): error creating kset\n", |
| 930 | __FILE__, __LINE__); |
| 931 | return -ENOMEM; |
Randy Dunlap | d8c7649 | 2006-09-29 01:58:55 -0700 | [diff] [blame] | 932 | } |
Greg Kroah-Hartman | 823bccf | 2007-04-13 13:15:19 -0700 | [diff] [blame] | 933 | module_sysfs_initialized = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | |
Dmitry Torokhov | e94965e | 2010-12-15 14:00:19 -0800 | [diff] [blame] | 935 | version_sysfs_builtin(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | param_sysfs_builtin(); |
| 937 | |
| 938 | return 0; |
| 939 | } |
Mark Huang | d10be6d | 2006-09-29 01:59:34 -0700 | [diff] [blame] | 940 | subsys_initcall(param_sysfs_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | |
Greg Kroah-Hartman | 7405c1e | 2007-11-01 10:39:50 -0700 | [diff] [blame] | 942 | #endif /* CONFIG_SYSFS */ |