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Btrfs: sysfs: add pointer to access fs_info from fs_devices

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adds fs_info pointer with struct btrfs_fs_devices.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
Anand Jain 2015-03-10 06:38:31 +08:00 committed by David Sterba
parent c73eccf75b
commit 5a13f4308c
3 changed files with 25 additions and 0 deletions
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4
fs/btrfs/sysfs.c
View File

@ -530,6 +530,8 @@ static void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs)
void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info)
{
btrfs_reset_fs_info_ptr(fs_info);
if (fs_info->space_info_kobj) {
sysfs_remove_files(fs_info->space_info_kobj, allocation_attrs);
kobject_del(fs_info->space_info_kobj);
@ -729,6 +731,8 @@ int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info)
struct btrfs_fs_devices *fs_devs = fs_info->fs_devices;
struct kobject *super_kobj = &fs_devs->super_kobj;
btrfs_set_fs_info_ptr(fs_info);
error = btrfs_sysfs_add_fsid(fs_devs, NULL);
if (error)
return error;

18
fs/btrfs/volumes.c
View File

@ -6733,3 +6733,21 @@ void btrfs_update_commit_device_bytes_used(struct btrfs_root *root,
}
unlock_chunks(root);
}
void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info)
{
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
while (fs_devices) {
fs_devices->fs_info = fs_info;
fs_devices = fs_devices->seed;
}
}
void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info)
{
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
while (fs_devices) {
fs_devices->fs_info = NULL;
fs_devices = fs_devices->seed;
}
}

3
fs/btrfs/volumes.h
View File

@ -254,6 +254,7 @@ struct btrfs_fs_devices {
*/
int rotating;
struct btrfs_fs_info *fs_info;
/* sysfs kobjects */
struct kobject super_kobj;
struct kobject *device_dir_kobj;
@ -543,5 +544,7 @@ static inline void unlock_chunks(struct btrfs_root *root)
}
struct list_head *btrfs_get_fs_uuids(void);
void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info);
void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info);
#endif