On Thu, Jul 07, 2016 at 09:32:37PM -0400, Jeff Mahoney wrote:
> On 6/24/16 6:14 PM, je...@suse.com wrote:
> > From: Jeff Mahoney <je...@suse.com>
> > 
> > This allows the upcoming patchset to push nodesize and sectorsize into
> > fs_info.
> > 
> > Signed-off-by: Jeff Mahoney <je...@suse.com>
> > ---
> >  fs/btrfs/ctree.h                       |  1 +
> >  fs/btrfs/disk-io.c                     | 15 +++++++----
> >  fs/btrfs/disk-io.h                     |  3 ++-
> >  fs/btrfs/tests/btrfs-tests.c           | 20 ++++++++++++---
> >  fs/btrfs/tests/btrfs-tests.h           |  1 +
> >  fs/btrfs/tests/extent-buffer-tests.c   | 23 +++++++++++------
> >  fs/btrfs/tests/free-space-tests.c      | 14 +++++++----
> >  fs/btrfs/tests/free-space-tree-tests.c | 18 +++++++------
> >  fs/btrfs/tests/inode-tests.c           | 46 
> > ++++++++++++++++++----------------
> >  fs/btrfs/tests/qgroup-tests.c          | 23 +++++++++--------
> >  10 files changed, 103 insertions(+), 61 deletions(-)
> > 
> > diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
> > index 100d2ea..4781057 100644
> > --- a/fs/btrfs/ctree.h
> > +++ b/fs/btrfs/ctree.h
> > @@ -117,6 +117,7 @@ static inline unsigned long btrfs_chunk_item_size(int 
> > num_stripes)
> >  #define BTRFS_FS_STATE_REMOUNTING  1
> >  #define BTRFS_FS_STATE_TRANS_ABORTED       2
> >  #define BTRFS_FS_STATE_DEV_REPLACING       3
> > +#define BTRFS_FS_STATE_DUMMY_FS_INFO       4
> >  
> >  #define BTRFS_BACKREF_REV_MAX              256
> >  #define BTRFS_BACKREF_REV_SHIFT            56
> > diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
> > index 8f27127..418163d 100644
> > --- a/fs/btrfs/disk-io.c
> > +++ b/fs/btrfs/disk-io.c
> > @@ -1233,6 +1233,7 @@ static void __setup_root(u32 nodesize, u32 
> > sectorsize, u32 stripesize,
> >                      struct btrfs_root *root, struct btrfs_fs_info *fs_info,
> >                      u64 objectid)
> >  {
> > +   bool dummy = test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
> >     root->node = NULL;
> >     root->commit_root = NULL;
> >     root->sectorsize = sectorsize;
> > @@ -1287,14 +1288,14 @@ static void __setup_root(u32 nodesize, u32 
> > sectorsize, u32 stripesize,
> >     root->log_transid = 0;
> >     root->log_transid_committed = -1;
> >     root->last_log_commit = 0;
> > -   if (fs_info)
> > +   if (dummy)
> 
> This should be:
> if (!dummy)
> 
> >             extent_io_tree_init(&root->dirty_log_pages,
> >                                  fs_info->btree_inode->i_mapping);
> >  
> >     memset(&root->root_key, 0, sizeof(root->root_key));
> >     memset(&root->root_item, 0, sizeof(root->root_item));
> >     memset(&root->defrag_progress, 0, sizeof(root->defrag_progress));
> > -   if (fs_info)
> > +   if (dummy)
> 
> So should this.

Updated in the patch.
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