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authorJosef Bacik <josef@redhat.com>2010-10-14 14:52:27 -0400
committerJosef Bacik <josef@redhat.com>2010-10-22 15:54:55 -0400
commit89a55897a2fbbceb94480952784004bf23911d38 (patch)
treee62ea1ced4c7941ab53e7aa7047ce8f0af0add9f
parentbf5fc093c5b625e4259203f1cee7ca73488a5620 (diff)
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Btrfs: fix df regression
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>
-rw-r--r--fs/btrfs/ctree.h5
-rw-r--r--fs/btrfs/extent-tree.c10
-rw-r--r--fs/btrfs/super.c11
3 files changed, 23 insertions, 3 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 29c2009..014fd52 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -675,7 +675,8 @@ struct btrfs_block_group_item {
struct btrfs_space_info {
u64 flags;
- u64 total_bytes; /* total bytes in the space */
+ u64 total_bytes; /* total bytes in the space,
+ this doesn't take mirrors into account */
u64 bytes_used; /* total bytes used,
this does't take mirrors into account */
u64 bytes_pinned; /* total bytes pinned, will be freed when the
@@ -687,6 +688,8 @@ struct btrfs_space_info {
u64 bytes_may_use; /* number of bytes that may be used for
delalloc/allocations */
u64 disk_used; /* total bytes used on disk */
+ u64 disk_total; /* total bytes on disk, takes mirrors into
+ account */
int full; /* indicates that we cannot allocate any more
chunks for this space */
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index c6a5d90..4669c6f 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2763,6 +2763,7 @@ static int update_space_info(struct btrfs_fs_info *info, u64 flags,
if (found) {
spin_lock(&found->lock);
found->total_bytes += total_bytes;
+ found->disk_total += total_bytes * factor;
found->bytes_used += bytes_used;
found->disk_used += bytes_used * factor;
found->full = 0;
@@ -2782,6 +2783,7 @@ static int update_space_info(struct btrfs_fs_info *info, u64 flags,
BTRFS_BLOCK_GROUP_SYSTEM |
BTRFS_BLOCK_GROUP_METADATA);
found->total_bytes = total_bytes;
+ found->disk_total = total_bytes * factor;
found->bytes_used = bytes_used;
found->disk_used = bytes_used * factor;
found->bytes_pinned = 0;
@@ -8095,6 +8097,7 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
struct btrfs_free_cluster *cluster;
struct btrfs_key key;
int ret;
+ int factor;
root = root->fs_info->extent_root;
@@ -8103,6 +8106,12 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
BUG_ON(!block_group->ro);
memcpy(&key, &block_group->key, sizeof(key));
+ if (block_group->flags & (BTRFS_BLOCK_GROUP_DUP |
+ BTRFS_BLOCK_GROUP_RAID1 |
+ BTRFS_BLOCK_GROUP_RAID10))
+ factor = 2;
+ else
+ factor = 1;
/* make sure this block group isn't part of an allocation cluster */
cluster = &root->fs_info->data_alloc_cluster;
@@ -8143,6 +8152,7 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
spin_lock(&block_group->space_info->lock);
block_group->space_info->total_bytes -= block_group->key.offset;
block_group->space_info->bytes_readonly -= block_group->key.offset;
+ block_group->space_info->disk_total -= block_group->key.offset * factor;
spin_unlock(&block_group->space_info->lock);
btrfs_clear_space_info_full(root->fs_info);
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index f2393b3..afab6ca 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -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;