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btrfs: dev delete should remove sysfs entry 

when we delete the device from the mounted btrfs,
we would need its corresponding sysfs enty to
be removed as well.

Signed-off-by: Anand Jain <Anand.Jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Anand Jain 2014-06-03 11:36:00 +08:00 committed by Chris Mason
parent 9b4eaf43f4
commit 99994cde9c
3 changed files with 26 additions and 0 deletions
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20
fs/btrfs/sysfs.c
View File

@ -605,6 +605,26 @@ static void init_feature_attrs(void)
}
}
int btrfs_kobj_rm_device(struct btrfs_fs_info *fs_info,
struct btrfs_device *one_device)
{
struct hd_struct *disk;
struct kobject *disk_kobj;
if (!fs_info->device_dir_kobj)
return -EINVAL;
if (one_device) {
disk = one_device->bdev->bd_part;
disk_kobj = &part_to_dev(disk)->kobj;
sysfs_remove_link(fs_info->device_dir_kobj,
disk_kobj->name);
}
return 0;
}
static int btrfs_kobj_add_device(struct btrfs_fs_info *fs_info)
{
int error = 0;

2
fs/btrfs/sysfs.h
View File

@ -66,4 +66,6 @@ char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags);
extern const char * const btrfs_feature_set_names[3];
extern struct kobj_type space_info_ktype;
extern struct kobj_type btrfs_raid_ktype;
int btrfs_kobj_rm_device(struct btrfs_fs_info *fs_info,
struct btrfs_device *one_device);
#endif /* _BTRFS_SYSFS_H_ */

4
fs/btrfs/volumes.c
View File

@ -40,6 +40,7 @@
#include "rcu-string.h"
#include "math.h"
#include "dev-replace.h"
#include "sysfs.h"
static int init_first_rw_device(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
@ -1680,6 +1681,9 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path)
if (device->bdev)
device->fs_devices->open_devices--;
/* remove sysfs entry */
btrfs_kobj_rm_device(root->fs_info, device);
call_rcu(&device->rcu, free_device);
num_devices = btrfs_super_num_devices(root->fs_info->super_copy) - 1;