along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/ctype.h>
-#if 0
-#define DEBUGP printk
-#else
-#define DEBUGP(fmt, a...)
-#endif
-
/* Protects all parameters, and incidentally kmalloced_param list. */
static DEFINE_MUTEX(param_lock);
}
}
-static inline char dash2underscore(char c)
+static char dash2underscore(char c)
{
if (c == '-')
return '_';
return c;
}
-static inline int parameq(const char *input, const char *paramname)
+bool parameqn(const char *a, const char *b, size_t n)
{
- unsigned int i;
- for (i = 0; dash2underscore(input[i]) == paramname[i]; i++)
- if (input[i] == '\0')
- return 1;
- return 0;
+ 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);
}
static int parse_one(char *param,
char *val,
+ const char *doing,
const struct kernel_param *params,
unsigned num_params,
- int (*handle_unknown)(char *param, char *val))
+ s16 min_level,
+ s16 max_level,
+ int (*handle_unknown)(char *param, char *val,
+ const char *doing))
{
unsigned int i;
int err;
/* Find parameter */
for (i = 0; i < num_params; i++) {
if (parameq(param, params[i].name)) {
+ if (params[i].level < min_level
+ || params[i].level > max_level)
+ return 0;
/* No one handled NULL, so do it here. */
- if (!val && params[i].ops->set != param_set_bool)
+ if (!val && params[i].ops->set != param_set_bool
+ && params[i].ops->set != param_set_bint)
return -EINVAL;
- DEBUGP("They are equal! Calling %p\n",
- params[i].ops->set);
+ pr_debug("handling %s with %p\n", param,
+ params[i].ops->set);
mutex_lock(¶m_lock);
err = params[i].ops->set(val, ¶ms[i]);
mutex_unlock(¶m_lock);
}
if (handle_unknown) {
- DEBUGP("Unknown argument: calling %p\n", handle_unknown);
- return handle_unknown(param, val);
+ pr_debug("doing %s: %s='%s'\n", doing, param, val);
+ return handle_unknown(param, val, doing);
}
- DEBUGP("Unknown argument `%s'\n", param);
+ pr_debug("Unknown argument '%s'\n", param);
return -ENOENT;
}
}
/* Args looks like "foo=bar,bar2 baz=fuz wiz". */
-int parse_args(const char *name,
+int parse_args(const char *doing,
char *args,
const struct kernel_param *params,
unsigned num,
- int (*unknown)(char *param, char *val))
+ s16 min_level,
+ s16 max_level,
+ int (*unknown)(char *param, char *val, const char *doing))
{
char *param, *val;
- DEBUGP("Parsing ARGS: %s\n", args);
-
/* Chew leading spaces */
args = skip_spaces(args);
+ if (*args)
+ pr_debug("doing %s, parsing ARGS: '%s'\n", doing, args);
+
while (*args) {
int ret;
int irq_was_disabled;
args = next_arg(args, ¶m, &val);
irq_was_disabled = irqs_disabled();
- ret = parse_one(param, val, params, num, unknown);
- if (irq_was_disabled && !irqs_disabled()) {
- printk(KERN_WARNING "parse_args(): option '%s' enabled "
- "irq's!\n", param);
- }
+ ret = parse_one(param, val, doing, params, num,
+ min_level, max_level, unknown);
+ if (irq_was_disabled && !irqs_disabled())
+ pr_warn("%s: option '%s' enabled irq's!\n",
+ doing, param);
+
switch (ret) {
case -ENOENT:
- printk(KERN_ERR "%s: Unknown parameter `%s'\n",
- name, param);
+ pr_err("%s: Unknown parameter `%s'\n", doing, param);
return ret;
case -ENOSPC:
- printk(KERN_ERR
- "%s: `%s' too large for parameter `%s'\n",
- name, val ?: "", param);
+ pr_err("%s: `%s' too large for parameter `%s'\n",
+ doing, val ?: "", param);
return ret;
case 0:
break;
default:
- printk(KERN_ERR
- "%s: `%s' invalid for parameter `%s'\n",
- name, val ?: "", param);
+ pr_err("%s: `%s' invalid for parameter `%s'\n",
+ doing, val ?: "", param);
return ret;
}
}
return 0;
}
-#ifdef CONFIG_RK_CONFIG
-static int ignore_unknown(char *param, char *val)
-{
- return 0;
-}
-
-int module_parse_kernel_cmdline(const char *name, const struct kernel_param *params, unsigned num)
-{
- int ret;
- unsigned i;
- size_t name_len = strlen(name);
- struct kernel_param new_params[num];
- char args[strlen(saved_command_line) + 1];
-
- if (!num)
- return 0;
-
- strcpy(args, saved_command_line);
- memcpy(new_params, params, sizeof(struct kernel_param) * num);
-
- for (i = 0; i < num; i++)
- new_params[i].name = NULL;
- for (i = 0; i < num; i++) {
- char *new_name = kmalloc(strlen(params[i].name) + name_len + 2, GFP_KERNEL);
- if (!new_name) {
- ret = -ENOMEM;
- goto out;
- }
- sprintf(new_name, "%s.%s", name, params[i].name);
- new_params[i].name = new_name;
- }
-
- ret = parse_args(name, args, new_params, num, ignore_unknown);
-
-out:
- for (i = 0; i < num; i++)
- if (new_params[i].name)
- kfree(new_params[i].name);
- return ret;
-}
-#endif
-
/* Lazy bastard, eh? */
#define STANDARD_PARAM_DEF(name, type, format, tmptype, strtolfn) \
int param_set_##name(const char *val, const struct kernel_param *kp) \
int ret; \
\
ret = strtolfn(val, 0, &l); \
- if (ret == -EINVAL || ((type)l != l)) \
- return -EINVAL; \
+ if (ret < 0 || ((type)l != l)) \
+ return ret < 0 ? ret : -EINVAL; \
*((type *)kp->arg) = l; \
return 0; \
} \
int param_set_charp(const char *val, const struct kernel_param *kp)
{
if (strlen(val) > 1024) {
- printk(KERN_ERR "%s: string parameter too long\n",
- kp->name);
+ pr_err("%s: string parameter too long\n", kp->name);
return -ENOSPC;
}
/* Actually could be a bool or an int, for historical reasons. */
int param_set_bool(const char *val, const struct kernel_param *kp)
{
- bool v;
- int ret;
-
/* No equals means "set"... */
if (!val) val = "1";
/* One of =[yYnN01] */
- ret = strtobool(val, &v);
- if (ret)
- return ret;
-
- if (kp->flags & KPARAM_ISBOOL)
- *(bool *)kp->arg = v;
- else
- *(int *)kp->arg = v;
- return 0;
+ return strtobool(val, kp->arg);
}
EXPORT_SYMBOL(param_set_bool);
int param_get_bool(char *buffer, const struct kernel_param *kp)
{
- bool val;
- if (kp->flags & KPARAM_ISBOOL)
- val = *(bool *)kp->arg;
- else
- val = *(int *)kp->arg;
-
/* Y and N chosen as being relatively non-coder friendly */
- return sprintf(buffer, "%c", val ? 'Y' : 'N');
+ return sprintf(buffer, "%c", *(bool *)kp->arg ? 'Y' : 'N');
}
EXPORT_SYMBOL(param_get_bool);
struct kernel_param dummy;
dummy.arg = &boolval;
- dummy.flags = KPARAM_ISBOOL;
ret = param_set_bool(val, &dummy);
if (ret == 0)
*(bool *)kp->arg = !boolval;
};
EXPORT_SYMBOL(param_ops_invbool);
+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;
+
+ ret = param_set_bool(val, &boolkp);
+ if (ret == 0)
+ *(int *)kp->arg = v;
+ return ret;
+}
+EXPORT_SYMBOL(param_set_bint);
+
+struct kernel_param_ops param_ops_bint = {
+ .set = param_set_bint,
+ .get = param_get_int,
+};
+EXPORT_SYMBOL(param_ops_bint);
+
/* We break the rule and mangle the string. */
static int param_array(const char *name,
const char *val,
unsigned int min, unsigned int max,
void *elem, int elemsize,
int (*set)(const char *, const struct kernel_param *kp),
- u16 flags,
+ s16 level,
unsigned int *num)
{
int ret;
/* Get the name right for errors. */
kp.name = name;
kp.arg = elem;
- kp.flags = flags;
+ kp.level = level;
*num = 0;
/* We expect a comma-separated list of values. */
int len;
if (*num == max) {
- printk(KERN_ERR "%s: can only take %i arguments\n",
- name, max);
+ pr_err("%s: can only take %i arguments\n", name, max);
return -EINVAL;
}
len = strcspn(val, ",");
} while (save == ',');
if (*num < min) {
- printk(KERN_ERR "%s: needs at least %i arguments\n",
- name, min);
+ pr_err("%s: needs at least %i arguments\n", name, min);
return -EINVAL;
}
return 0;
unsigned int temp_num;
return param_array(kp->name, val, 1, arr->max, arr->elem,
- arr->elemsize, arr->ops->set, kp->flags,
+ arr->elemsize, arr->ops->set, kp->level,
arr->num ?: &temp_num);
}
const struct kparam_string *kps = kp->str;
if (strlen(val)+1 > kps->maxlen) {
- printk(KERN_ERR "%s: string doesn't fit in %u chars.\n",
+ pr_err("%s: string doesn't fit in %u chars.\n",
kp->name, kps->maxlen-1);
return -ENOSPC;
}
#define to_param_attr(n) container_of(n, struct param_attribute, mattr)
static ssize_t param_attr_show(struct module_attribute *mattr,
- struct module *mod, char *buf)
+ struct module_kobject *mk, char *buf)
{
int count;
struct param_attribute *attribute = to_param_attr(mattr);
/* sysfs always hands a nul-terminated string in buf. We rely on that. */
static ssize_t param_attr_store(struct module_attribute *mattr,
- struct module *owner,
+ struct module_kobject *km,
const char *buf, size_t len)
{
int err;
sizeof(*mk->mp) + sizeof(mk->mp->attrs[0]) * (num+1),
GFP_KERNEL);
if (!new) {
- kfree(mk->mp);
+ kfree(attrs);
err = -ENOMEM;
goto fail;
}
+ /* 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. */
attrs = krealloc(attrs, sizeof(new->grp.attrs[0])*(num+2), GFP_KERNEL);
if (!attrs) {
err = -ENOMEM;
mk->kobj.kset = module_kset;
err = kobject_init_and_add(&mk->kobj, &module_ktype, NULL,
"%s", name);
+#ifdef CONFIG_MODULES
+ if (!err)
+ err = sysfs_create_file(&mk->kobj, &module_uevent.attr);
+#endif
if (err) {
kobject_put(&mk->kobj);
- printk(KERN_ERR
- "Module '%s' failed add to sysfs, error number %d\n",
+ pr_crit("Adding module '%s' to sysfs failed (%d), the system may be unstable.\n",
name, err);
- printk(KERN_ERR
- "The system will be unstable now.\n");
return NULL;
}
}
ssize_t __modver_version_show(struct module_attribute *mattr,
- struct module *mod, char *buf)
+ struct module_kobject *mk, char *buf)
{
struct module_version_attribute *vattr =
container_of(mattr, struct module_version_attribute, mattr);
if (!attribute->show)
return -EIO;
- ret = attribute->show(attribute, mk->mod, buf);
+ ret = attribute->show(attribute, mk, buf);
return ret;
}
if (!attribute->store)
return -EIO;
- ret = attribute->store(attribute, mk->mod, buf, len);
+ ret = attribute->store(attribute, mk, buf, len);
return ret;
}
projects / firefly-linux-kernel-4.4.55.git / blobdiff