diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/super.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 3f1f4e2..2375f94 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1696,7 +1696,11 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf) struct btrfs_block_rsv *block_rsv = &fs_info->global_block_rsv; int ret; - /* holding chunk_muext to avoid allocating new chunks */ + /* + * holding chunk_muext to avoid allocating new chunks, holding + * device_list_mutex to avoid the device being removed + */ + mutex_lock(&fs_info->fs_devices->device_list_mutex); mutex_lock(&fs_info->chunk_mutex); rcu_read_lock(); list_for_each_entry_rcu(found, head, list) { @@ -1737,11 +1741,13 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf) ret = btrfs_calc_avail_data_space(fs_info->tree_root, &total_free_data); if (ret) { mutex_unlock(&fs_info->chunk_mutex); + mutex_unlock(&fs_info->fs_devices->device_list_mutex); return ret; } buf->f_bavail += div_u64(total_free_data, factor); buf->f_bavail = buf->f_bavail >> bits; mutex_unlock(&fs_info->chunk_mutex); + mutex_unlock(&fs_info->fs_devices->device_list_mutex); buf->f_type = BTRFS_SUPER_MAGIC; buf->f_bsize = dentry->d_sb->s_blocksize; |
