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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115// SPDX-License-Identifier: GPL-2.0/* * module.c - module sysfs fun for drivers */#include <linux/device.h>#include <linux/module.h>#include <linux/errno.h>#include <linux/slab.h>#include <linux/string.h>#include "base.h"
static char *make_driver_name(const struct device_driver *drv){ char *driver_name;
driver_name = kasprintf(GFP_KERNEL, "%s:%s", drv->bus->name, drv->name); if (!driver_name) return NULL;
return driver_name;}
static void module_create_drivers_dir(struct module_kobject *mk){ static DEFINE_MUTEX(drivers_dir_mutex);
mutex_lock(&drivers_dir_mutex); if (mk && !mk->drivers_dir) mk->drivers_dir = kobject_create_and_add("drivers", &mk->kobj); mutex_unlock(&drivers_dir_mutex);}
int module_add_driver(struct module *mod, const struct device_driver *drv){ char *driver_name; struct module_kobject *mk = NULL; int ret;
if (!drv) return 0;
if (mod) mk = &mod->mkobj; else if (drv->mod_name) { /* Lookup or create built-in module entry in /sys/module */ mk = lookup_or_create_module_kobject(drv->mod_name); if (mk) { /* remember our module structure */ drv->p->mkobj = mk; /* lookup_or_create_module_kobject took a reference */ kobject_put(&mk->kobj); } }
if (!mk) return 0;
ret = sysfs_create_link(&drv->p->kobj, &mk->kobj, "module"); if (ret) return ret;
driver_name = make_driver_name(drv); if (!driver_name) { ret = -ENOMEM; goto out_remove_kobj; }
module_create_drivers_dir(mk); if (!mk->drivers_dir) { ret = -EINVAL; goto out_free_driver_name; }
ret = sysfs_create_link(mk->drivers_dir, &drv->p->kobj, driver_name); if (ret) goto out_remove_drivers_dir;
kfree(driver_name);
return 0;
out_remove_drivers_dir: sysfs_remove_link(mk->drivers_dir, driver_name);
out_free_driver_name: kfree(driver_name);
out_remove_kobj: sysfs_remove_link(&drv->p->kobj, "module"); return ret;}
void module_remove_driver(const struct device_driver *drv){ struct module_kobject *mk = NULL; char *driver_name;
if (!drv) return;
sysfs_remove_link(&drv->p->kobj, "module");
if (drv->owner) mk = &drv->owner->mkobj; else if (drv->p->mkobj) mk = drv->p->mkobj; if (mk && mk->drivers_dir) { driver_name = make_driver_name(drv); if (driver_name) { sysfs_remove_link(mk->drivers_dir, driver_name); kfree(driver_name); } }}