leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

efivars: Make efivars bin_attributes dynamic

Browse Source 
In preparation for encapsulating efivars, we need to have the
bin_attributes be dynamically allocated so that we can use their
->private fields to get back to the struct efivars structure.

Signed-off-by: Mike Waychison <mikew@google.com>
Cc: Matt Domsch <Matt_Domsch@dell.com>,
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Mike Waychison 2011-03-11 17:43:06 -08:00 committed by Greg Kroah-Hartman
parent 29422693c4
commit d502fbb0dc
1 changed files with 68 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

93
drivers/firmware/efivars.c
View File

@ -101,6 +101,7 @@ struct efivars {
spinlock_t lock;
struct list_head list;
struct kset *kset;
struct bin_attribute *new_var, *del_var;
};
static struct efivars __efivars;
static struct efivars *efivars = &__efivars;
@ -525,16 +526,6 @@ static ssize_t efivar_delete(struct file *filp, struct kobject *kobj,
return count;
}
static struct bin_attribute var_subsys_attr_new_var = {
.attr = {.name = "new_var", .mode = 0200},
.write = efivar_create,
};
static struct bin_attribute var_subsys_attr_del_var = {
.attr = {.name = "del_var", .mode = 0200},
.write = efivar_delete,
};
/*
* Let's not leave out systab information that snuck into
* the efivars driver
@ -640,6 +631,66 @@ efivar_create_sysfs_entry(unsigned long variable_name_size,
return 0;
}
static int
create_efivars_bin_attributes(struct efivars *efivars)
{
struct bin_attribute *attr;
int error;
/* new_var */
attr = kzalloc(sizeof(*attr), GFP_KERNEL);
if (!attr)
return -ENOMEM;
attr->attr.name = "new_var";
attr->attr.mode = 0200;
attr->write = efivar_create;
attr->private = efivars;
efivars->new_var = attr;
/* del_var */
attr = kzalloc(sizeof(*attr), GFP_KERNEL);
if (!attr) {
error = -ENOMEM;
goto out_free;
}
attr->attr.name = "del_var";
attr->attr.mode = 0200;
attr->write = efivar_delete;
attr->private = efivars;
efivars->del_var = attr;
sysfs_bin_attr_init(efivars->new_var);
sysfs_bin_attr_init(efivars->del_var);
/* Register */
error = sysfs_create_bin_file(&efivars->kset->kobj,
efivars->new_var);
if (error) {
printk(KERN_ERR "efivars: unable to create new_var sysfs file"
" due to error %d\n", error);
goto out_free;
}
error = sysfs_create_bin_file(&efivars->kset->kobj,
efivars->del_var);
if (error) {
printk(KERN_ERR "efivars: unable to create del_var sysfs file"
" due to error %d\n", error);
sysfs_remove_bin_file(&efivars->kset->kobj,
efivars->new_var);
goto out_free;
}
return 0;
out_free:
kfree(efivars->new_var);
efivars->new_var = NULL;
kfree(efivars->new_var);
efivars->new_var = NULL;
return error;
}
/*
* For now we register the efi subsystem with the firmware subsystem
* and the vars subsystem with the efi subsystem. In the future, it
@ -714,20 +765,7 @@ efivars_init(void)
}
} while (status != EFI_NOT_FOUND);
/*
* Now add attributes to allow creation of new vars
* and deletion of existing ones...
*/
error = sysfs_create_bin_file(&efivars->kset->kobj,
&var_subsys_attr_new_var);
if (error)
printk(KERN_ERR "efivars: unable to create new_var sysfs file"
" due to error %d\n", error);
error = sysfs_create_bin_file(&efivars->kset->kobj,
&var_subsys_attr_del_var);
if (error)
printk(KERN_ERR "efivars: unable to create del_var sysfs file"
" due to error %d\n", error);
error = create_efivars_bin_attributes(efivars);
/* Don't forget the systab entry */
error = sysfs_create_group(efi_kobj, &efi_subsys_attr_group);
@ -758,7 +796,12 @@ efivars_exit(void)
spin_unlock(&efivars->lock);
efivar_unregister(entry);
}
if (efivars->new_var)
sysfs_remove_bin_file(&efivars->kset->kobj, efivars->new_var);
if (efivars->del_var)
sysfs_remove_bin_file(&efivars->kset->kobj, efivars->del_var);
kfree(efivars->new_var);
kfree(efivars->del_var);
kset_unregister(efivars->kset);
kobject_put(efi_kobj);
}