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kernel/params.c
22.1 KB
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/* 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 */ |
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#include <linux/kernel.h> #include <linux/string.h> #include <linux/errno.h> #include <linux/module.h> #include <linux/device.h> #include <linux/err.h> |
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#include <linux/slab.h> |
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#include <linux/ctype.h> |
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/* Protects all parameters, and incidentally kmalloced_param list. */ static DEFINE_MUTEX(param_lock); |
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/* This just allows us to keep track of which parameters are kmalloced. */ struct kmalloced_param { struct list_head list; char val[]; }; |
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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; |
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list_add(&p->list, &kmalloced_params); |
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return p->val; } /* Does nothing if parameter wasn't kmalloced above. */ static void maybe_kfree_parameter(void *param) { struct kmalloced_param *p; |
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list_for_each_entry(p, &kmalloced_params, list) { if (p->val == param) { list_del(&p->list); kfree(p); break; } } |
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} |
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static char dash2underscore(char c) |
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{ if (c == '-') return '_'; return c; } |
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bool parameqn(const char *a, const char *b, size_t n) |
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{ |
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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); |
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} static int parse_one(char *param, char *val, |
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const char *doing, |
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const struct kernel_param *params, |
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unsigned num_params, |
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s16 min_level, s16 max_level, |
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int (*handle_unknown)(char *param, char *val, const char *doing)) |
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{ unsigned int i; |
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int err; |
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/* Find parameter */ for (i = 0; i < num_params; i++) { if (parameq(param, params[i].name)) { |
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if (params[i].level < min_level || params[i].level > max_level) return 0; |
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/* No one handled NULL, so do it here. */ |
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if (!val && !(params[i].ops->flags & KERNEL_PARAM_FL_NOARG)) |
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return -EINVAL; |
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pr_debug("handling %s with %p ", param, params[i].ops->set); |
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mutex_lock(¶m_lock); err = params[i].ops->set(val, ¶ms[i]); mutex_unlock(¶m_lock); return err; |
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} } if (handle_unknown) { |
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pr_debug("doing %s: %s='%s' ", doing, param, val); return handle_unknown(param, val, doing); |
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} |
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pr_debug("Unknown argument '%s' ", param); |
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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; |
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if (*args == '"') { args++; in_quote = 1; quoted = 1; } for (i = 0; args[i]; i++) { |
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if (isspace(args[i]) && !in_quote) |
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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; |
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/* Chew up trailing spaces. */ |
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return skip_spaces(next); |
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} /* Args looks like "foo=bar,bar2 baz=fuz wiz". */ |
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int parse_args(const char *doing, |
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char *args, |
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const struct kernel_param *params, |
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unsigned num, |
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s16 min_level, s16 max_level, |
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int (*unknown)(char *param, char *val, const char *doing)) |
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{ char *param, *val; |
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/* Chew leading spaces */ |
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args = skip_spaces(args); |
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|
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if (*args) |
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pr_debug("doing %s, parsing ARGS: '%s' ", doing, args); |
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while (*args) { int ret; |
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int irq_was_disabled; |
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args = next_arg(args, ¶m, &val); |
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irq_was_disabled = irqs_disabled(); |
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ret = parse_one(param, val, doing, params, num, |
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min_level, max_level, unknown); |
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if (irq_was_disabled && !irqs_disabled()) pr_warn("%s: option '%s' enabled irq's! ", doing, param); |
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switch (ret) { case -ENOENT: |
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pr_err("%s: Unknown parameter `%s' ", doing, param); |
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return ret; case -ENOSPC: |
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pr_err("%s: `%s' too large for parameter `%s' ", |
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doing, val ?: "", param); |
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return ret; case 0: break; default: |
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pr_err("%s: `%s' invalid for parameter `%s' ", |
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return ret; } } /* All parsed OK. */ return 0; } /* Lazy bastard, eh? */ #define STANDARD_PARAM_DEF(name, type, format, tmptype, strtolfn) \ |
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int param_set_##name(const char *val, const struct kernel_param *kp) \ |
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{ \ |
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tmptype l; \ |
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int ret; \ |
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\ |
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ret = strtolfn(val, 0, &l); \ |
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if (ret < 0 || ((type)l != l)) \ return ret < 0 ? ret : -EINVAL; \ |
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*((type *)kp->arg) = l; \ return 0; \ } \ |
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int param_get_##name(char *buffer, const struct kernel_param *kp) \ |
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{ \ |
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return scnprintf(buffer, PAGE_SIZE, format, \ *((type *)kp->arg)); \ |
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} \ |
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struct kernel_param_ops param_ops_##name = { \ .set = param_set_##name, \ .get = param_get_##name, \ }; \ |
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EXPORT_SYMBOL(param_set_##name); \ |
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EXPORT_SYMBOL(param_get_##name); \ EXPORT_SYMBOL(param_ops_##name) |
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|
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STANDARD_PARAM_DEF(byte, unsigned char, "%hhu", unsigned long, kstrtoul); |
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STANDARD_PARAM_DEF(short, short, "%hi", long, kstrtol); |
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STANDARD_PARAM_DEF(ushort, unsigned short, "%hu", unsigned long, kstrtoul); |
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STANDARD_PARAM_DEF(int, int, "%i", long, kstrtol); |
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STANDARD_PARAM_DEF(uint, unsigned int, "%u", unsigned long, kstrtoul); |
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STANDARD_PARAM_DEF(long, long, "%li", long, kstrtol); |
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STANDARD_PARAM_DEF(ulong, unsigned long, "%lu", unsigned long, kstrtoul); |
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|
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int param_set_charp(const char *val, const struct kernel_param *kp) |
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{ |
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if (strlen(val) > 1024) { |
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pr_err("%s: string parameter too long ", kp->name); |
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return -ENOSPC; } |
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maybe_kfree_parameter(*(char **)kp->arg); /* This is a hack. We can't kmalloc in early boot, and we |
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* don't need to; this mangled commandline is preserved. */ if (slab_is_available()) { |
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*(char **)kp->arg = kmalloc_parameter(strlen(val)+1); |
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if (!*(char **)kp->arg) |
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return -ENOMEM; |
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strcpy(*(char **)kp->arg, val); |
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} else *(const char **)kp->arg = val; |
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return 0; } |
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EXPORT_SYMBOL(param_set_charp); |
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|
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int param_get_charp(char *buffer, const struct kernel_param *kp) |
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{ |
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return scnprintf(buffer, PAGE_SIZE, "%s", *((char **)kp->arg)); |
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} |
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EXPORT_SYMBOL(param_get_charp); |
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|
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static void param_free_charp(void *arg) { maybe_kfree_parameter(*((char **)arg)); } |
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struct kernel_param_ops param_ops_charp = { .set = param_set_charp, .get = param_get_charp, |
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.free = param_free_charp, |
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}; EXPORT_SYMBOL(param_ops_charp); |
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/* Actually could be a bool or an int, for historical reasons. */ |
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int param_set_bool(const char *val, const struct kernel_param *kp) |
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{ /* No equals means "set"... */ if (!val) val = "1"; /* One of =[yYnN01] */ |
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return strtobool(val, kp->arg); |
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} |
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EXPORT_SYMBOL(param_set_bool); |
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|
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int param_get_bool(char *buffer, const struct kernel_param *kp) |
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{ /* Y and N chosen as being relatively non-coder friendly */ |
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return sprintf(buffer, "%c", *(bool *)kp->arg ? 'Y' : 'N'); |
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} |
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EXPORT_SYMBOL(param_get_bool); |
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|
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struct kernel_param_ops param_ops_bool = { |
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.flags = KERNEL_PARAM_FL_NOARG, |
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.set = param_set_bool, .get = param_get_bool, }; EXPORT_SYMBOL(param_ops_bool); |
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/* This one must be bool. */ |
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int param_set_invbool(const char *val, const struct kernel_param *kp) |
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{ |
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int ret; bool boolval; |
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struct kernel_param dummy; |
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|
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dummy.arg = &boolval; |
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ret = param_set_bool(val, &dummy); if (ret == 0) |
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*(bool *)kp->arg = !boolval; |
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return ret; } |
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EXPORT_SYMBOL(param_set_invbool); |
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|
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int param_get_invbool(char *buffer, const struct kernel_param *kp) |
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{ |
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return sprintf(buffer, "%c", (*(bool *)kp->arg) ? 'N' : 'Y'); |
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} |
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EXPORT_SYMBOL(param_get_invbool); |
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struct kernel_param_ops param_ops_invbool = { .set = param_set_invbool, .get = param_get_invbool, }; EXPORT_SYMBOL(param_ops_invbool); |
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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; |
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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 = { |
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.flags = KERNEL_PARAM_FL_NOARG, |
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.set = param_set_bint, .get = param_get_int, }; EXPORT_SYMBOL(param_ops_bint); |
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/* We break the rule and mangle the string. */ |
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static int param_array(const char *name, const char *val, unsigned int min, unsigned int max, void *elem, int elemsize, |
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int (*set)(const char *, const struct kernel_param *kp), |
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s16 level, |
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unsigned int *num) |
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{ int ret; struct kernel_param kp; char save; /* Get the name right for errors. */ kp.name = name; kp.arg = elem; |
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kp.level = level; |
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|
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*num = 0; /* We expect a comma-separated list of values. */ do { int len; if (*num == max) { |
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pr_err("%s: can only take %i arguments ", name, max); |
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return -EINVAL; } len = strcspn(val, ","); /* nul-terminate and parse */ save = val[len]; ((char *)val)[len] = '\0'; |
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BUG_ON(!mutex_is_locked(¶m_lock)); |
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ret = set(val, &kp); if (ret != 0) return ret; kp.arg += elemsize; val += len+1; (*num)++; } while (save == ','); if (*num < min) { |
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pr_err("%s: needs at least %i arguments ", name, min); |
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return -EINVAL; } return 0; } |
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static int param_array_set(const char *val, const struct kernel_param *kp) |
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{ |
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const struct kparam_array *arr = kp->arr; |
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unsigned int temp_num; |
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return param_array(kp->name, val, 1, arr->max, arr->elem, |
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arr->elemsize, arr->ops->set, kp->level, |
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arr->num ?: &temp_num); |
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} |
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static int param_array_get(char *buffer, const struct kernel_param *kp) |
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{ int i, off, ret; |
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const struct kparam_array *arr = kp->arr; |
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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; |
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BUG_ON(!mutex_is_locked(¶m_lock)); |
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ret = arr->ops->get(buffer + off, &p); |
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if (ret < 0) return ret; off += ret; } buffer[off] = '\0'; return off; } |
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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... |
460 461 462 |
struct kernel_param_ops param_array_ops = { .set = param_array_set, .get = param_array_get, |
e6df34a44 param: add a free... |
463 |
.free = param_array_free, |
9bbb9e5a3 param: use ops in... |
464 465 466 467 |
}; EXPORT_SYMBOL(param_array_ops); int param_set_copystring(const char *val, const struct kernel_param *kp) |
1da177e4c Linux-2.6.12-rc2 |
468 |
{ |
22e48eaf5 constify string/a... |
469 |
const struct kparam_string *kps = kp->str; |
1da177e4c Linux-2.6.12-rc2 |
470 471 |
if (strlen(val)+1 > kps->maxlen) { |
b5f3abf95 params: replace p... |
472 473 |
pr_err("%s: string doesn't fit in %u chars. ", |
1da177e4c Linux-2.6.12-rc2 |
474 475 476 477 478 479 |
kp->name, kps->maxlen-1); return -ENOSPC; } strcpy(kps->string, val); return 0; } |
a14fe249a param: move the E... |
480 |
EXPORT_SYMBOL(param_set_copystring); |
1da177e4c Linux-2.6.12-rc2 |
481 |
|
9bbb9e5a3 param: use ops in... |
482 |
int param_get_string(char *buffer, const struct kernel_param *kp) |
1da177e4c Linux-2.6.12-rc2 |
483 |
{ |
22e48eaf5 constify string/a... |
484 |
const struct kparam_string *kps = kp->str; |
1da177e4c Linux-2.6.12-rc2 |
485 486 |
return strlcpy(buffer, kps->string, kps->maxlen); } |
a14fe249a param: move the E... |
487 |
EXPORT_SYMBOL(param_get_string); |
1da177e4c Linux-2.6.12-rc2 |
488 |
|
9bbb9e5a3 param: use ops in... |
489 490 491 492 493 |
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 |
494 |
/* sysfs output in /sys/modules/XYZ/parameters/ */ |
350f82586 Remove redundant ... |
495 496 |
#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 |
497 498 |
extern struct kernel_param __start___param[], __stop___param[]; |
1da177e4c Linux-2.6.12-rc2 |
499 500 501 |
struct param_attribute { struct module_attribute mattr; |
9bbb9e5a3 param: use ops in... |
502 |
const struct kernel_param *param; |
1da177e4c Linux-2.6.12-rc2 |
503 504 505 506 |
}; struct module_param_attrs { |
9b473de87 param: Fix duplic... |
507 |
unsigned int num; |
1da177e4c Linux-2.6.12-rc2 |
508 509 510 |
struct attribute_group grp; struct param_attribute attrs[0]; }; |
ef665c1a0 sysfs: fix build ... |
511 |
#ifdef CONFIG_SYSFS |
350f82586 Remove redundant ... |
512 |
#define to_param_attr(n) container_of(n, struct param_attribute, mattr) |
1da177e4c Linux-2.6.12-rc2 |
513 514 |
static ssize_t param_attr_show(struct module_attribute *mattr, |
4befb026c module: change at... |
515 |
struct module_kobject *mk, char *buf) |
1da177e4c Linux-2.6.12-rc2 |
516 517 518 |
{ int count; struct param_attribute *attribute = to_param_attr(mattr); |
9bbb9e5a3 param: use ops in... |
519 |
if (!attribute->param->ops->get) |
1da177e4c Linux-2.6.12-rc2 |
520 |
return -EPERM; |
907b29eb4 param: locking fo... |
521 |
mutex_lock(¶m_lock); |
9bbb9e5a3 param: use ops in... |
522 |
count = attribute->param->ops->get(buf, attribute->param); |
907b29eb4 param: locking fo... |
523 |
mutex_unlock(¶m_lock); |
1da177e4c Linux-2.6.12-rc2 |
524 525 526 527 528 529 530 531 532 533 |
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... |
534 |
struct module_kobject *km, |
1da177e4c Linux-2.6.12-rc2 |
535 536 537 538 |
const char *buf, size_t len) { int err; struct param_attribute *attribute = to_param_attr(mattr); |
9bbb9e5a3 param: use ops in... |
539 |
if (!attribute->param->ops->set) |
1da177e4c Linux-2.6.12-rc2 |
540 |
return -EPERM; |
907b29eb4 param: locking fo... |
541 |
mutex_lock(¶m_lock); |
9bbb9e5a3 param: use ops in... |
542 |
err = attribute->param->ops->set(buf, attribute->param); |
907b29eb4 param: locking fo... |
543 |
mutex_unlock(¶m_lock); |
1da177e4c Linux-2.6.12-rc2 |
544 545 546 547 |
if (!err) return len; return err; } |
ef665c1a0 sysfs: fix build ... |
548 |
#endif |
1da177e4c Linux-2.6.12-rc2 |
549 550 551 552 553 554 |
#ifdef CONFIG_MODULES #define __modinit #else #define __modinit __init #endif |
ef665c1a0 sysfs: fix build ... |
555 |
#ifdef CONFIG_SYSFS |
907b29eb4 param: locking fo... |
556 557 558 559 560 561 562 563 564 565 566 |
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 |
567 |
/* |
9b473de87 param: Fix duplic... |
568 569 570 571 |
* 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 |
572 |
* |
9b473de87 param: Fix duplic... |
573 574 575 |
* 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 |
576 |
*/ |
9b473de87 param: Fix duplic... |
577 |
static __modinit int add_sysfs_param(struct module_kobject *mk, |
9bbb9e5a3 param: use ops in... |
578 |
const struct kernel_param *kp, |
9b473de87 param: Fix duplic... |
579 |
const char *name) |
1da177e4c Linux-2.6.12-rc2 |
580 |
{ |
9b473de87 param: Fix duplic... |
581 582 583 584 585 586 587 588 589 590 591 592 593 |
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 |
594 |
} |
9b473de87 param: Fix duplic... |
595 596 597 598 599 |
/* Enlarge. */ new = krealloc(mk->mp, sizeof(*mk->mp) + sizeof(mk->mp->attrs[0]) * (num+1), GFP_KERNEL); if (!new) { |
63662139e params: Fix poten... |
600 |
kfree(attrs); |
9b473de87 param: Fix duplic... |
601 602 603 |
err = -ENOMEM; goto fail; } |
63662139e params: Fix poten... |
604 605 606 |
/* Despite looking like the typical realloc() bug, this is safe. * We *want* the old 'attrs' to be freed either way, and we'll store * the new one in the success case. */ |
9b473de87 param: Fix duplic... |
607 608 609 610 611 |
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 |
612 |
|
9b473de87 param: Fix duplic... |
613 614 615 616 617 618 619 620 |
/* 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_... |
621 |
sysfs_attr_init(&new->attrs[num].mattr.attr); |
9b473de87 param: Fix duplic... |
622 623 624 625 626 627 628 629 630 631 632 633 634 635 |
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 |
636 |
|
9b473de87 param: Fix duplic... |
637 638 639 640 641 642 |
fail_free_new: kfree(new); fail: mk->mp = NULL; return err; } |
1da177e4c Linux-2.6.12-rc2 |
643 |
|
d2441183d Fix compile warni... |
644 |
#ifdef CONFIG_MODULES |
9b473de87 param: Fix duplic... |
645 646 647 648 649 |
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 |
650 |
} |
1da177e4c Linux-2.6.12-rc2 |
651 652 653 654 655 656 |
/* * 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... |
657 658 |
* Adds sysfs entries for module parameters under * /sys/module/[mod->name]/parameters/ |
1da177e4c Linux-2.6.12-rc2 |
659 660 |
*/ int module_param_sysfs_setup(struct module *mod, |
9bbb9e5a3 param: use ops in... |
661 |
const struct kernel_param *kparam, |
1da177e4c Linux-2.6.12-rc2 |
662 663 |
unsigned int num_params) { |
9b473de87 param: Fix duplic... |
664 665 666 667 668 669 670 671 672 673 674 |
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 |
675 |
|
9b473de87 param: Fix duplic... |
676 677 |
if (!params) return 0; |
1da177e4c Linux-2.6.12-rc2 |
678 |
|
9b473de87 param: Fix duplic... |
679 680 681 682 683 |
/* 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 |
684 685 686 687 688 689 690 691 692 693 694 |
} /* * 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... |
695 696 |
if (mod->mkobj.mp) { sysfs_remove_group(&mod->mkobj.kobj, &mod->mkobj.mp->grp); |
1da177e4c Linux-2.6.12-rc2 |
697 698 |
/* We are positive that no one is using any param * attrs at this point. Deallocate immediately. */ |
9b473de87 param: Fix duplic... |
699 |
free_module_param_attrs(&mod->mkobj); |
1da177e4c Linux-2.6.12-rc2 |
700 701 702 |
} } #endif |
e180a6b77 param: fix charp ... |
703 704 |
void destroy_params(const struct kernel_param *params, unsigned num) { |
e6df34a44 param: add a free... |
705 706 707 708 709 |
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 ... |
710 |
} |
e94965ed5 module: show vers... |
711 |
static struct module_kobject * __init locate_module_kobject(const char *name) |
1da177e4c Linux-2.6.12-rc2 |
712 713 |
{ struct module_kobject *mk; |
9b473de87 param: Fix duplic... |
714 715 |
struct kobject *kobj; int err; |
1da177e4c Linux-2.6.12-rc2 |
716 |
|
9b473de87 param: Fix duplic... |
717 718 |
kobj = kset_find_obj(module_kset, name); if (kobj) { |
9b473de87 param: Fix duplic... |
719 |
mk = to_module_kobject(kobj); |
9b473de87 param: Fix duplic... |
720 721 722 723 724 725 726 727 |
} 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/... |
728 729 730 731 |
#ifdef CONFIG_MODULES if (!err) err = sysfs_create_file(&mk->kobj, &module_uevent.attr); #endif |
9b473de87 param: Fix duplic... |
732 733 |
if (err) { kobject_put(&mk->kobj); |
b5f3abf95 params: replace p... |
734 735 |
pr_crit("Adding module '%s' to sysfs failed (%d), the system may be unstable. ", |
e94965ed5 module: show vers... |
736 |
name, err); |
e94965ed5 module: show vers... |
737 |
return NULL; |
9b473de87 param: Fix duplic... |
738 |
} |
e94965ed5 module: show vers... |
739 740 |
/* So that we hold reference in both cases. */ |
9b473de87 param: Fix duplic... |
741 |
kobject_get(&mk->kobj); |
74c5b597e modules: better e... |
742 |
} |
9b473de87 param: Fix duplic... |
743 |
|
e94965ed5 module: show vers... |
744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 |
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... |
761 762 763 764 765 |
/* 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 ... |
766 |
kobject_uevent(&mk->kobj, KOBJ_ADD); |
9b473de87 param: Fix duplic... |
767 |
kobject_put(&mk->kobj); |
1da177e4c Linux-2.6.12-rc2 |
768 769 770 |
} /* |
b634d130e There is no /sys/... |
771 |
* param_sysfs_builtin - add sysfs parameters for built-in modules |
1da177e4c Linux-2.6.12-rc2 |
772 773 774 775 776 777 |
* * 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... |
778 |
* and for all who have the same, call kernel_add_sysfs_param. |
1da177e4c Linux-2.6.12-rc2 |
779 780 781 |
*/ static void __init param_sysfs_builtin(void) { |
9b473de87 param: Fix duplic... |
782 783 784 |
struct kernel_param *kp; unsigned int name_len; char modname[MODULE_NAME_LEN]; |
1da177e4c Linux-2.6.12-rc2 |
785 |
|
9b473de87 param: Fix duplic... |
786 |
for (kp = __start___param; kp < __stop___param; kp++) { |
1da177e4c Linux-2.6.12-rc2 |
787 |
char *dot; |
9b473de87 param: Fix duplic... |
788 789 |
if (kp->perm == 0) continue; |
1da177e4c Linux-2.6.12-rc2 |
790 |
|
730b69d22 module: check ker... |
791 |
dot = strchr(kp->name, '.'); |
1da177e4c Linux-2.6.12-rc2 |
792 |
if (!dot) { |
67e67ceaa core_param() for ... |
793 794 795 796 797 798 |
/* 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 |
799 |
} |
67e67ceaa core_param() for ... |
800 |
kernel_add_sysfs_param(modname, kp, name_len); |
1da177e4c Linux-2.6.12-rc2 |
801 |
} |
1da177e4c Linux-2.6.12-rc2 |
802 |
} |
e94965ed5 module: show vers... |
803 |
ssize_t __modver_version_show(struct module_attribute *mattr, |
4befb026c module: change at... |
804 |
struct module_kobject *mk, char *buf) |
e94965ed5 module: show vers... |
805 806 807 |
{ struct module_version_attribute *vattr = container_of(mattr, struct module_version_attribute, mattr); |
f4940ab7c kernel/params.c: ... |
808 809 |
return scnprintf(buf, PAGE_SIZE, "%s ", vattr->version); |
e94965ed5 module: show vers... |
810 |
} |
b4bc84280 module: deal with... |
811 812 |
extern const struct module_version_attribute *__start___modver[]; extern const struct module_version_attribute *__stop___modver[]; |
e94965ed5 module: show vers... |
813 814 815 |
static void __init version_sysfs_builtin(void) { |
b4bc84280 module: deal with... |
816 |
const struct module_version_attribute **p; |
e94965ed5 module: show vers... |
817 818 |
struct module_kobject *mk; int err; |
b4bc84280 module: deal with... |
819 820 |
for (p = __start___modver; p < __stop___modver; p++) { const struct module_version_attribute *vattr = *p; |
e94965ed5 module: show vers... |
821 822 823 824 825 826 827 828 |
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 |
829 830 |
/* module-related sysfs stuff */ |
1da177e4c Linux-2.6.12-rc2 |
831 |
|
1da177e4c Linux-2.6.12-rc2 |
832 833 834 835 836 837 838 839 840 841 842 843 |
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... |
844 |
return -EIO; |
1da177e4c Linux-2.6.12-rc2 |
845 |
|
4befb026c module: change at... |
846 |
ret = attribute->show(attribute, mk, buf); |
1da177e4c Linux-2.6.12-rc2 |
847 |
|
1da177e4c Linux-2.6.12-rc2 |
848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 |
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... |
863 |
return -EIO; |
1da177e4c Linux-2.6.12-rc2 |
864 |
|
4befb026c module: change at... |
865 |
ret = attribute->store(attribute, mk, buf, len); |
1da177e4c Linux-2.6.12-rc2 |
866 |
|
1da177e4c Linux-2.6.12-rc2 |
867 868 |
return ret; } |
52cf25d0a Driver core: Cons... |
869 |
static const struct sysfs_ops module_sysfs_ops = { |
1da177e4c Linux-2.6.12-rc2 |
870 871 872 |
.show = module_attr_show, .store = module_attr_store, }; |
270a6c4ca /sys/modules/*/ho... |
873 874 875 876 877 878 879 880 |
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... |
881 |
static const struct kset_uevent_ops module_uevent_ops = { |
270a6c4ca /sys/modules/*/ho... |
882 883 |
.filter = uevent_filter, }; |
7405c1e15 kset: convert /sy... |
884 |
struct kset *module_kset; |
823bccfc4 remove "struct su... |
885 |
int module_sysfs_initialized; |
1da177e4c Linux-2.6.12-rc2 |
886 |
|
942e44312 module: Fix mod->... |
887 888 889 890 891 |
static void module_kobj_release(struct kobject *kobj) { struct module_kobject *mk = to_module_kobject(kobj); complete(mk->kobj_completion); } |
7405c1e15 kset: convert /sy... |
892 |
struct kobj_type module_ktype = { |
942e44312 module: Fix mod->... |
893 |
.release = module_kobj_release, |
1da177e4c Linux-2.6.12-rc2 |
894 895 |
.sysfs_ops = &module_sysfs_ops, }; |
1da177e4c Linux-2.6.12-rc2 |
896 897 898 899 900 |
/* * param_sysfs_init - wrapper for built-in params support */ static int __init param_sysfs_init(void) { |
7405c1e15 kset: convert /sy... |
901 902 903 904 905 906 |
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... |
907 |
} |
823bccfc4 remove "struct su... |
908 |
module_sysfs_initialized = 1; |
1da177e4c Linux-2.6.12-rc2 |
909 |
|
e94965ed5 module: show vers... |
910 |
version_sysfs_builtin(); |
1da177e4c Linux-2.6.12-rc2 |
911 912 913 914 |
param_sysfs_builtin(); return 0; } |
d10be6d1b [PATCH] module_su... |
915 |
subsys_initcall(param_sysfs_init); |
1da177e4c Linux-2.6.12-rc2 |
916 |
|
7405c1e15 kset: convert /sy... |
917 |
#endif /* CONFIG_SYSFS */ |