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-rw-r--r--fs/btrfs/super.c41
1 files changed, 15 insertions, 26 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 1866dff0538e..f2393b390318 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -360,6 +360,8 @@ static struct dentry *get_default_root(struct super_block *sb,
*/
dir_id = btrfs_super_root_dir(&root->fs_info->super_copy);
di = btrfs_lookup_dir_item(NULL, root, path, dir_id, "default", 7, 0);
+ if (IS_ERR(di))
+ return ERR_CAST(di);
if (!di) {
/*
* Ok the default dir item isn't there. This is weird since
@@ -390,8 +392,8 @@ setup_root:
location.offset = 0;
inode = btrfs_iget(sb, &location, new_root, &new);
- if (!inode)
- return ERR_PTR(-ENOMEM);
+ if (IS_ERR(inode))
+ return ERR_CAST(inode);
/*
* If we're just mounting the root most subvol put the inode and return
@@ -498,7 +500,7 @@ int btrfs_sync_fs(struct super_block *sb, int wait)
btrfs_start_delalloc_inodes(root, 0);
btrfs_wait_ordered_extents(root, 0, 0);
- trans = btrfs_start_transaction(root, 1);
+ trans = btrfs_start_transaction(root, 0);
ret = btrfs_commit_transaction(trans, root);
return ret;
}
@@ -694,11 +696,11 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data)
if (btrfs_super_log_root(&root->fs_info->super_copy) != 0)
return -EINVAL;
- /* recover relocation */
- ret = btrfs_recover_relocation(root);
+ ret = btrfs_cleanup_fs_roots(root->fs_info);
WARN_ON(ret);
- ret = btrfs_cleanup_fs_roots(root->fs_info);
+ /* recover relocation */
+ ret = btrfs_recover_relocation(root);
WARN_ON(ret);
sb->s_flags &= ~MS_RDONLY;
@@ -714,34 +716,18 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf)
struct list_head *head = &root->fs_info->space_info;
struct btrfs_space_info *found;
u64 total_used = 0;
- u64 data_used = 0;
int bits = dentry->d_sb->s_blocksize_bits;
__be32 *fsid = (__be32 *)root->fs_info->fsid;
rcu_read_lock();
- list_for_each_entry_rcu(found, head, list) {
- if (found->flags & (BTRFS_BLOCK_GROUP_DUP|
- BTRFS_BLOCK_GROUP_RAID10|
- BTRFS_BLOCK_GROUP_RAID1)) {
- total_used += found->bytes_used;
- if (found->flags & BTRFS_BLOCK_GROUP_DATA)
- data_used += found->bytes_used;
- else
- data_used += found->total_bytes;
- }
-
- total_used += found->bytes_used;
- if (found->flags & BTRFS_BLOCK_GROUP_DATA)
- data_used += found->bytes_used;
- else
- data_used += found->total_bytes;
- }
+ list_for_each_entry_rcu(found, head, list)
+ total_used += found->disk_used;
rcu_read_unlock();
buf->f_namelen = BTRFS_NAME_LEN;
buf->f_blocks = btrfs_super_total_bytes(disk_super) >> bits;
buf->f_bfree = buf->f_blocks - (total_used >> bits);
- buf->f_bavail = buf->f_blocks - (data_used >> bits);
+ buf->f_bavail = buf->f_bfree;
buf->f_bsize = dentry->d_sb->s_blocksize;
buf->f_type = BTRFS_SUPER_MAGIC;
@@ -832,11 +818,14 @@ static const struct file_operations btrfs_ctl_fops = {
};
static struct miscdevice btrfs_misc = {
- .minor = MISC_DYNAMIC_MINOR,
+ .minor = BTRFS_MINOR,
.name = "btrfs-control",
.fops = &btrfs_ctl_fops
};
+MODULE_ALIAS_MISCDEV(BTRFS_MINOR);
+MODULE_ALIAS("devname:btrfs-control");
+
static int btrfs_interface_init(void)
{
return misc_register(&btrfs_misc);