linux-stable.git/fs/btrfs/relocation.c, branch v4.3

btrfs: Remove unnecessary variants in relocation.c

2015-08-09T14:07:14+00:00

These arguments are not used in functions, remove them for cleanup
and make kernel stack happy.

Signed-off-by: Zhao Lei 
Signed-off-by: Chris Mason

btrfs: Cleanup: Remove objectid's init-value in create_reloc_inode()

2015-08-09T14:07:13+00:00

objectid's init-value is not used in any case, remove it.

Signed-off-by: Zhao Lei 
Reviewed-by: David Sterba 
Signed-off-by: Chris Mason

btrfs: Error handle for get_ref_objectid_v0() in relocate_block_group()

2015-08-09T14:07:13+00:00

We need error checking code for get_ref_objectid_v0() in
relocate_block_group(), to avoid unpredictable result, especially
for accessing uninitialized value(when function failed) after
this line.

Signed-off-by: Zhao Lei 
Reviewed-by: David Sterba 
Signed-off-by: Chris Mason

btrfs: Use ref_cnt for set_block_group_ro()

2015-08-09T14:07:12+00:00

More than one code call set_block_group_ro() and restore rw in fail.

Old code use bool bit to save blockgroup's ro state, it can not
support parallel case(it is confirmd exist in my debug log).

This patch use ref count to store ro state, and rename
set_block_group_ro/set_block_group_rw
to
inc_block_group_ro/dec_block_group_ro.

Signed-off-by: Zhao Lei 
Signed-off-by: Chris Mason

Btrfs: fix wrong check for btrfs_force_chunk_alloc()

2015-07-02T00:17:22+00:00

btrfs_force_chunk_alloc() return 1 for allocation chunk successfully.
This problem exists since commit c87f08ca4.

With this patch, we might fix some enospc problems for balances.

Signed-off-by: Wang Shilong 
Reviewed-by: Filipe Manana 
Tested-by: Filipe Manana 
Signed-off-by: Chris Mason

Btrfs: fix up read_tree_block to return proper error

2015-06-03T11:03:08+00:00

The return value of read_tree_block() can confuse callers as it always
returns NULL for either -ENOMEM or -EIO, so it's likely that callers
parse it to a wrong error, for instance, in btrfs_read_tree_root().

This fixes the above issue.

Signed-off-by: Liu Bo 
Reviewed-by: David Sterba 
Signed-off-by: Chris Mason

btrfs: qgroup: do a reservation in a higher level.

2015-04-13T14:52:50+00:00

There are two problems in qgroup:

a). The PAGE_CACHE is 4K, even when we are writing a data of 1K,
qgroup will reserve a 4K size. It will cause the last 3K in a qgroup
is not available to user.

b). When user is writing a inline data, qgroup will not reserve it,
it means this is a window we can exceed the limit of a qgroup.

The main idea of this patch is reserving the data size of write_bytes
rather than the reserve_bytes. It means qgroup will not care about
the data size btrfs will reserve for user, but only care about the
data size user is going to write. Then reserve it when user want to
write and release it in transaction committed.

In this way, qgroup can be released from the complex procedure in
btrfs and only do the reserve when user want to write and account
when the data is written in commit_transaction().

Signed-off-by: Dongsheng Yang 
Signed-off-by: Chris Mason

Btrfs: allow block group cache writeout outside critical section in commit

2015-04-10T21:07:22+00:00

We loop through all of the dirty block groups during commit and write
the free space cache.  In order to make sure the cache is currect, we do
this while no other writers are allowed in the commit.

If a large number of block groups are dirty, this can introduce long
stalls during the final stages of the commit, which can block new procs
trying to change the filesystem.

This commit changes the block group cache writeout to take appropriate
locks and allow it to run earlier in the commit.  We'll still have to
redo some of the block groups, but it means we can get most of the work
out of the way without blocking the entire FS.

Signed-off-by: Chris Mason

btrfs: sink blocksize parameter to tree_block_processed

2014-12-12T17:07:22+00:00

Signed-off-by: David Sterba

btrfs: sink blocksize parameter to readahead_tree_block

2014-12-12T17:07:18+00:00

All callers pass nodesize.

Signed-off-by: David Sterba