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Driver core: show drivers in /sys/module/

Browse source 
Show the drivers, which belong to the module:
  $ ls -l /sys/module/usbcore/drivers/
  hub -> ../../../bus/usb/drivers/hub
  usb -> ../../../bus/usb/drivers/usb
  usbfs -> ../../../bus/usb/drivers/usbfs

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Kay Sievers 2006-11-24 12:15:25 +01:00 • committed by Greg Kroah-Hartman
parent c957b32406
commit e17e0f51ae
2 changed files with 26 additions and 6 deletions
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1
include/linux/module.h
View file

@ -264,6 +264,7 @@ struct module
struct module_attribute *modinfo_attrs; struct module_attribute *modinfo_attrs;
const char *version; const char *version;
const char *srcversion; const char *srcversion;
struct kobject *drivers_dir;
/* Exported symbols */ /* Exported symbols */
const struct kernel_symbol *syms; const struct kernel_symbol *syms;

31
kernel/module.c
View file

@ -1086,22 +1086,35 @@ static int mod_sysfs_setup(struct module *mod,
goto out; goto out;
kobj_set_kset_s(&mod->mkobj, module_subsys); kobj_set_kset_s(&mod->mkobj, module_subsys);
mod->mkobj.mod = mod; mod->mkobj.mod = mod;
err = kobject_register(&mod->mkobj.kobj);
/* delay uevent until full sysfs population */
kobject_init(&mod->mkobj.kobj);
err = kobject_add(&mod->mkobj.kobj);
if (err) if (err)
goto out; goto out;
mod->drivers_dir = kobject_add_dir(&mod->mkobj.kobj, "drivers");
if (!mod->drivers_dir)
goto out_unreg;
err = module_param_sysfs_setup(mod, kparam, num_params); err = module_param_sysfs_setup(mod, kparam, num_params);
if (err) if (err)
goto out_unreg; goto out_unreg_drivers;
err = module_add_modinfo_attrs(mod); err = module_add_modinfo_attrs(mod);
if (err) if (err)
goto out_unreg; goto out_unreg_param;
kobject_uevent(&mod->mkobj.kobj, KOBJ_ADD);
return 0; return 0;
out_unreg_drivers:
kobject_unregister(mod->drivers_dir);
out_unreg_param:
module_param_sysfs_remove(mod);
out_unreg: out_unreg:
kobject_unregister(&mod->mkobj.kobj); kobject_del(&mod->mkobj.kobj);
kobject_put(&mod->mkobj.kobj);
out: out:
return err; return err;
} }
@ -1110,6 +1123,7 @@ static void mod_kobject_remove(struct module *mod)
{ {
module_remove_modinfo_attrs(mod); module_remove_modinfo_attrs(mod);
module_param_sysfs_remove(mod); module_param_sysfs_remove(mod);
kobject_unregister(mod->drivers_dir);
kobject_unregister(&mod->mkobj.kobj); kobject_unregister(&mod->mkobj.kobj);
} }
@ -2275,11 +2289,14 @@ void print_modules(void)
void module_add_driver(struct module *mod, struct device_driver *drv) void module_add_driver(struct module *mod, struct device_driver *drv)
{ {
int no_warn;
if (!mod || !drv) if (!mod || !drv)
return; return;
/* Don't check return code; this call is idempotent */ /* Don't check return codes; these calls are idempotent */
sysfs_create_link(&drv->kobj, &mod->mkobj.kobj, "module"); no_warn = sysfs_create_link(&drv->kobj, &mod->mkobj.kobj, "module");
no_warn = sysfs_create_link(mod->drivers_dir, &drv->kobj, drv->name);
} }
EXPORT_SYMBOL(module_add_driver); EXPORT_SYMBOL(module_add_driver);
@ -2288,6 +2305,8 @@ void module_remove_driver(struct device_driver *drv)
if (!drv) if (!drv)
return; return;
sysfs_remove_link(&drv->kobj, "module"); sysfs_remove_link(&drv->kobj, "module");
if (drv->owner && drv->owner->drivers_dir)
sysfs_remove_link(drv->owner->drivers_dir, drv->name);
} }
EXPORT_SYMBOL(module_remove_driver); EXPORT_SYMBOL(module_remove_driver);