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btrfs: add btrfs_sysfs_remove_device helper 

btrfs_sysfs_remove_devices_dir() removes device link and devid kobject
(sysfs entries) for a device or all the devices in the btrfs_fs_devices.
In preparation to remove these sysfs entries for the seed as well, add
a btrfs_sysfs_remove_device() helper function and avoid code
duplication.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Anand Jain 2020-09-05 01:34:24 +08:00 committed by David Sterba
parent 178a16c940
commit 985e233e96
1 changed files with 27 additions and 34 deletions
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61
fs/btrfs/sysfs.c
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@ -1186,50 +1186,43 @@ int btrfs_sysfs_add_space_info_type(struct btrfs_fs_info *fs_info,
return 0;
}
/* when one_device is NULL, it removes all device links */
int btrfs_sysfs_remove_devices_dir(struct btrfs_fs_devices *fs_devices,
struct btrfs_device *one_device)
static void btrfs_sysfs_remove_device(struct btrfs_device *device)
{
struct hd_struct *disk;
struct kobject *disk_kobj;
struct kobject *devices_kobj;
if (!fs_devices->devices_kobj)
return -EINVAL;
/*
* Seed fs_devices devices_kobj aren't used, fetch kobject from the
* fs_info::fs_devices.
*/
devices_kobj = device->fs_info->fs_devices->devices_kobj;
ASSERT(devices_kobj);
if (one_device) {
if (one_device->bdev) {
disk = one_device->bdev->bd_part;
disk_kobj = &part_to_dev(disk)->kobj;
sysfs_remove_link(fs_devices->devices_kobj,
disk_kobj->name);
}
if (device->bdev) {
disk = device->bdev->bd_part;
disk_kobj = &part_to_dev(disk)->kobj;
sysfs_remove_link(devices_kobj, disk_kobj->name);
}
if (one_device->devid_kobj.state_initialized) {
kobject_del(&one_device->devid_kobj);
kobject_put(&one_device->devid_kobj);
wait_for_completion(&one_device->kobj_unregister);
}
if (device->devid_kobj.state_initialized) {
kobject_del(&device->devid_kobj);
kobject_put(&device->devid_kobj);
wait_for_completion(&device->kobj_unregister);
}
}
/* When @device is NULL, remove all devices link */
int btrfs_sysfs_remove_devices_dir(struct btrfs_fs_devices *fs_devices,
struct btrfs_device *device)
{
if (device) {
btrfs_sysfs_remove_device(device);
return 0;
}
list_for_each_entry(one_device, &fs_devices->devices, dev_list) {
if (one_device->bdev) {
disk = one_device->bdev->bd_part;
disk_kobj = &part_to_dev(disk)->kobj;
sysfs_remove_link(fs_devices->devices_kobj,
disk_kobj->name);
}
if (one_device->devid_kobj.state_initialized) {
kobject_del(&one_device->devid_kobj);
kobject_put(&one_device->devid_kobj);
wait_for_completion(&one_device->kobj_unregister);
}
}
list_for_each_entry(device, &fs_devices->devices, dev_list)
btrfs_sysfs_remove_device(device);
return 0;
}