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Btrfs: fix df regression

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The new ENOSPC stuff breaks out the raid types which breaks the way we were
reporting df to the system.  This fixes it back so that Available is the total
space available to data and used is the actual bytes used by the filesystem.
This means that Available is Total - data used - all of the metadata space.
Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
This commit is contained in:
Josef Bacik
2010-10-14 14:52:27 -04:00
parent bf5fc093c5
commit 89a55897a2
3 changed files with 23 additions and 3 deletions
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11
fs/btrfs/super.c
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@@ -716,18 +716,25 @@ 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 total_used_data = 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)
list_for_each_entry_rcu(found, head, list) {
if (found->flags & (BTRFS_BLOCK_GROUP_METADATA |
BTRFS_BLOCK_GROUP_SYSTEM))
total_used_data += found->disk_total;
else
total_used_data += found->disk_used;
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_bfree;
buf->f_bavail = buf->f_blocks - (total_used_data >> bits);
buf->f_bsize = dentry->d_sb->s_blocksize;
buf->f_type = BTRFS_SUPER_MAGIC;