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/config.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/module.h>
-#include <linux/device.h>
-#include <linux/err.h>
#if 0
#define DEBUGP printk
struct kparam_array *arr = kp->arg;
return param_array(kp->name, val, 1, arr->max, arr->elem,
- arr->elemsize, arr->set, arr->num ?: &arr->max);
+ arr->elemsize, arr->set, arr->num);
}
int param_array_get(char *buffer, struct kernel_param *kp)
struct kernel_param p;
p = *kp;
- for (i = off = 0; i < (arr->num ? *arr->num : arr->max); i++) {
+ for (i = off = 0; i < *arr->num; i++) {
if (i)
buffer[off++] = ',';
p.arg = arr->elem + arr->elemsize * i;
return strlcpy(buffer, kps->string, kps->maxlen);
}
-/* sysfs output in /sys/modules/XYZ/parameters/ */
-
-extern struct kernel_param __start___param[], __stop___param[];
-
-#define MAX_KBUILD_MODNAME KOBJ_NAME_LEN
-
-struct param_attribute
-{
- struct attribute attr;
- struct kernel_param *param;
-};
-
-struct param_kobject
-{
- struct kobject kobj;
-
- unsigned int num_attributes;
- struct param_attribute attr[0];
-};
-
-#define to_param_attr(n) container_of(n, struct param_attribute, attr);
-
-static ssize_t param_attr_show(struct kobject *kobj,
- struct attribute *attr,
- char *buf)
-{
- int count;
- struct param_attribute *attribute = to_param_attr(attr);
-
- if (!attribute->param->get)
- return -EPERM;
-
- count = attribute->param->get(buf, attribute->param);
- if (count > 0) {
- strcat(buf, "\n");
- ++count;
- }
- return count;
-}
-
-/* sysfs always hands a nul-terminated string in buf. We rely on that. */
-static ssize_t param_attr_store(struct kobject *kobj,
- struct attribute *attr,
- const char *buf, size_t len)
-{
- int err;
- struct param_attribute *attribute = to_param_attr(attr);
-
- if (!attribute->param->set)
- return -EPERM;
-
- err = attribute->param->set(buf, attribute->param);
- if (!err)
- return len;
- return err;
-}
-
-
-static struct sysfs_ops param_sysfs_ops = {
- .show = param_attr_show,
- .store = param_attr_store,
-};
-
-static void param_kobj_release(struct kobject *kobj)
-{
- kfree(container_of(kobj, struct param_kobject, kobj));
-}
-
-static struct kobj_type param_ktype = {
- .sysfs_ops = ¶m_sysfs_ops,
- .release = ¶m_kobj_release,
-};
-
-static struct kset param_kset = {
- .subsys = &module_subsys,
- .ktype = ¶m_ktype,
-};
-
-#ifdef CONFIG_MODULES
-#define __modinit
-#else
-#define __modinit __init
-#endif
-
-/*
- * param_add_attribute - actually adds an parameter to sysfs
- * @mod: owner of parameter
- * @pk: param_kobject the attribute shall be assigned to.
- * One per module, one per KBUILD_MODNAME.
- * @kp: kernel_param to be added
- * @skip: offset where the parameter name start in kp->name.
- * Needed for built-in modules
- *
- * Fill in data into appropriate &pk->attr[], and create sysfs file.
- */
-static __modinit int param_add_attribute(struct module *mod,
- struct param_kobject *pk,
- struct kernel_param *kp,
- unsigned int skip)
-{
- struct param_attribute *a;
- int err;
-
- a = &pk->attr[pk->num_attributes];
- a->attr.name = (char *) &kp->name[skip];
- a->attr.owner = mod;
- a->attr.mode = kp->perm;
- a->param = kp;
- err = sysfs_create_file(&pk->kobj, &a->attr);
- if (!err)
- pk->num_attributes++;
- return err;
-}
-
-/*
- * param_sysfs_remove - remove sysfs support for one module or KBUILD_MODNAME
- * @pk: struct param_kobject which is to be removed
- *
- * Called when an error in registration occurs or a module is removed
- * from the system.
- */
-static __modinit void param_sysfs_remove(struct param_kobject *pk)
-{
- unsigned int i;
- for (i = 0; i < pk->num_attributes; i++)
- sysfs_remove_file(&pk->kobj,&pk->attr[i].attr);
-
- /* Calls param_kobj_release */
- kobject_unregister(&pk->kobj);
-}
-
-
-/*
- * param_sysfs_setup - setup sysfs support for one module or KBUILD_MODNAME
- * @mk: struct module_kobject (contains parent kobject)
- * @kparam: array of struct kernel_param, the actual parameter definitions
- * @num_params: number of entries in array
- * @name_skip: offset where the parameter name start in kparam[].name. Needed for built-in "modules"
- *
- * Create a kobject for a (per-module) group of parameters, and create files
- * in sysfs. A pointer to the param_kobject is returned on success,
- * NULL if there's no parameter to export, or other ERR_PTR(err).
- */
-static __modinit struct param_kobject *
-param_sysfs_setup(struct module_kobject *mk,
- struct kernel_param *kparam,
- unsigned int num_params,
- unsigned int name_skip)
-{
- struct param_kobject *pk;
- unsigned int valid_attrs = 0;
- unsigned int i;
- int err;
-
- for (i=0; i<num_params; i++) {
- if (kparam[i].perm)
- valid_attrs++;
- }
-
- if (!valid_attrs)
- return NULL;
-
- pk = kmalloc(sizeof(struct param_kobject)
- + sizeof(struct param_attribute) * valid_attrs,
- GFP_KERNEL);
- if (!pk)
- return ERR_PTR(-ENOMEM);
- memset(pk, 0, sizeof(struct param_kobject)
- + sizeof(struct param_attribute) * valid_attrs);
-
- err = kobject_set_name(&pk->kobj, "parameters");
- if (err)
- goto out;
-
- pk->kobj.kset = ¶m_kset;
- pk->kobj.parent = &mk->kobj;
- err = kobject_register(&pk->kobj);
- if (err)
- goto out;
-
- for (i = 0; i < num_params; i++) {
- if (kparam[i].perm) {
- err = param_add_attribute(mk->mod, pk,
- &kparam[i], name_skip);
- if (err)
- goto out_unreg;
- }
- }
-
- return pk;
-
-out_unreg:
- param_sysfs_remove(pk);
- return ERR_PTR(err);
-
-out:
- kfree(pk);
- return ERR_PTR(err);
-}
-
-
-#ifdef CONFIG_MODULES
-
-/*
- * module_param_sysfs_setup - setup sysfs support for one module
- * @mod: module
- * @kparam: module parameters (array)
- * @num_params: number of module parameters
- *
- * Adds sysfs entries for module parameters, and creates a link from
- * /sys/module/[mod->name]/parameters to /sys/parameters/[mod->name]/
- */
-int module_param_sysfs_setup(struct module *mod,
- struct kernel_param *kparam,
- unsigned int num_params)
-{
- struct param_kobject *pk;
-
- pk = param_sysfs_setup(mod->mkobj, kparam, num_params, 0);
- if (IS_ERR(pk))
- return PTR_ERR(pk);
-
- mod->params_kobject = pk;
- return 0;
-}
-
-/*
- * 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)
-{
- if (mod->params_kobject) {
- param_sysfs_remove(mod->params_kobject);
- mod->params_kobject = NULL;
- }
-}
-#endif
-
-/*
- * kernel_param_sysfs_setup - wrapper for built-in params support
- */
-static void __init kernel_param_sysfs_setup(const char *name,
- struct kernel_param *kparam,
- unsigned int num_params,
- unsigned int name_skip)
-{
- struct module_kobject *mk;
-
- mk = kmalloc(sizeof(struct module_kobject), GFP_KERNEL);
- memset(mk, 0, sizeof(struct module_kobject));
-
- mk->mod = THIS_MODULE;
- kobj_set_kset_s(mk, module_subsys);
- kobject_set_name(&mk->kobj, name);
- kobject_register(&mk->kobj);
-
- /* no need to keep the kobject if no parameter is exported */
- if (!param_sysfs_setup(mk, kparam, num_params, name_skip))
- kobject_unregister(&mk->kobj);
-}
-
-/*
- * param_sysfs_builtin - add contents in /sys/parameters for built-in modules
- *
- * Add module_parameters to sysfs for "modules" built into the kernel.
- *
- * The "module" name (KBUILD_MODNAME) is stored before a dot, the
- * "parameter" name is stored behind a dot in kernel_param->name. So,
- * extract the "module" name for all built-in kernel_param-eters,
- * and for all who have the same, call kernel_param_sysfs_setup.
- */
-static void __init param_sysfs_builtin(void)
-{
- struct kernel_param *kp, *kp_begin = NULL;
- unsigned int i, name_len, count = 0;
- char modname[MAX_KBUILD_MODNAME + 1] = "";
-
- for (i=0; i < __stop___param - __start___param; i++) {
- char *dot;
-
- kp = &__start___param[i];
-
- /* We do not handle args without periods. */
- dot = memchr(kp->name, '.', MAX_KBUILD_MODNAME);
- if (!dot) {
- DEBUGP("couldn't find period in %s\n", kp->name);
- continue;
- }
- name_len = dot - kp->name;
-
- /* new kbuild_modname? */
- if (strlen(modname) != name_len
- || strncmp(modname, kp->name, name_len) != 0) {
- /* add a new kobject for previous kernel_params. */
- if (count)
- kernel_param_sysfs_setup(modname,
- kp_begin,
- count,
- strlen(modname)+1);
-
- strncpy(modname, kp->name, name_len);
- modname[name_len] = '\0';
- count = 0;
- kp_begin = kp;
- }
- count++;
- }
-
- /* last kernel_params need to be registered as well */
- if (count)
- kernel_param_sysfs_setup(modname, kp_begin, count,
- strlen(modname)+1);
-}
-
-
-/* module-related sysfs stuff */
-#ifdef CONFIG_MODULES
-
-#define to_module_attr(n) container_of(n, struct module_attribute, attr);
-#define to_module_kobject(n) container_of(n, struct module_kobject, kobj);
-
-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)
- return -EPERM;
-
- if (!try_module_get(mk->mod))
- return -ENODEV;
-
- ret = attribute->show(mk->mod, buf);
-
- module_put(mk->mod);
-
- return ret;
-}
-
-static struct sysfs_ops module_sysfs_ops = {
- .show = module_attr_show,
- .store = NULL,
-};
-
-#else
-static struct sysfs_ops module_sysfs_ops = {
- .show = NULL,
- .store = NULL,
-};
-#endif
-
-static void module_kobj_release(struct kobject *kobj)
-{
- kfree(container_of(kobj, struct module_kobject, kobj));
-}
-
-static struct kobj_type module_ktype = {
- .sysfs_ops = &module_sysfs_ops,
- .release = &module_kobj_release,
-};
-
-decl_subsys(module, &module_ktype, NULL);
-
-/*
- * param_sysfs_init - wrapper for built-in params support
- */
-static int __init param_sysfs_init(void)
-{
- subsystem_register(&module_subsys);
- kobject_set_name(¶m_kset.kobj, "parameters");
- kset_init(¶m_kset);
-
- param_sysfs_builtin();
-
- return 0;
-}
-__initcall(param_sysfs_init);
-
EXPORT_SYMBOL(param_set_byte);
EXPORT_SYMBOL(param_get_byte);
EXPORT_SYMBOL(param_set_short);
git://git.onelab.eu / linux-2.6.git / blobdiff