Commit Graph

155200 Commits

Author SHA1 Message Date
Tao Ma
37f8a2bfaa ocfs2: CoW a reflinked cluster when it is truncated.
When we truncate a file to a specific size which resides in a reflinked
cluster, we need to CoW it since ocfs2_zero_range_for_truncate will
zero the space after the size(just another type of write).

So we add a "max_cpos" in ocfs2_refcount_cow so that it will stop when
it hit the max cluster offset.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:38 -07:00
Tao Ma
293b2f70b4 ocfs2: Integrate CoW in file write.
When we use mmap, we CoW the refcountd clusters in
ocfs2_write_begin_nolock. While for normal file
io(including directio), we do CoW in
ocfs2_prepare_inode_for_write.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:37 -07:00
Tao Ma
6ae23c5555 ocfs2: CoW refcount tree improvement.
During CoW, if the old extent record is refcounted, we allocate
som new clusters and do CoW. Actually we can have some improvement
here. If the old extent has refcount=1, that means now it is only
used by this file. So we don't need to allocate new clusters, just
remove the refcounted flag and it is OK. We also have to remove
it from the refcount tree while not deleting it.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:36 -07:00
Tao Ma
6f70fa5199 ocfs2: Add CoW support.
This patch try CoW support for a refcounted record.

the whole process will be:
1. Calculate how many clusters we need to CoW and where we start.
   Extents that are not completely encompassed by the write will
   be broken on 1MB boundaries.
2. Do CoW for the clusters with the help of page cache.
3. Change the b-tree structure with the new allocated clusters.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:36 -07:00
Tao Ma
bcbbb24a6a ocfs2: Decrement refcount when truncating refcounted extents.
Add 'Decrement refcount for delete' in to the normal truncate
process. So for a refcounted extent record, call refcount rec
decrementation instead of cluster free.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:35 -07:00
Tao Ma
1aa75fea64 ocfs2: Add functions for extents refcounted.
Add function ocfs2_mark_extent_refcounted which can mark
an extent refcounted.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:34 -07:00
Tao Ma
1823cb0b9f ocfs2: Add support of decrementing refcount for delete.
Given a physical cpos and length, decrement the refcount
in the tree. If the refcount for any portion of the extent goes
to zero, that portion is queued for freeing.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:33 -07:00
Tao Ma
e73a819db9 ocfs2: Add support for incrementing refcount in the tree.
Given a physical cpos and length, increment the refcount
in the tree. If the extent has not been seen before, a refcount
record is created for it. Refcount records may be merged or
split by this operation.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:33 -07:00
Tao Ma
e2e9f6082b ocfs2: move tree path functions to alloc.h.
Now fs/ocfs2/alloc.c has more than 7000 lines. It contains our
basic b-tree operation. Although we have already make our b-tree
operation generic, the basic structrue ocfs2_path which is used
to iterate one b-tree branch is still static and limited to only
used in alloc.c. As refcount tree need them and I don't want to
add any more b-tree unrelated code to alloc.c, export them out.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:32 -07:00
Tao Ma
fe92441595 ocfs2: Add refcount b-tree as a new extent tree.
Add refcount b-tree as a new extent tree so that it can
use the b-tree to store and maniuplate ocfs2_refcount_rec.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:31 -07:00
Tao Ma
555936bfcb ocfs2: Abstract extent split process.
ocfs2_mark_extent_written actually does the following things:
1. check the parameters.
2. initialize the left_path and split_rec.
3. call __ocfs2_mark_extent_written. it will do:
   1) check the flags of unwritten
   2) do the real split work.
The whole process is packed tightly somehow. So this patch
will abstract 2 different functions so that future b-tree
operation can work with it.

1. __ocfs2_split_extent will accept path and split_rec and do
  the real split work.
2. ocfs2_change_extent_flag will accept a new flag and initialize
   path and split_rec.

So now ocfs2_mark_extent_written will do:
1. check the parameters.
2. call ocfs2_change_extent_flag.
   1) initalize the left_path and split_rec.
   2) check whether the new flags conflict with the old one.
   3) call __ocfs2_split_extent to do the split.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:31 -07:00
Tao Ma
853a3a1439 ocfs2: Wrap ocfs2_extent_contig in ocfs2_extent_tree.
Add a new operation eo_ocfs2_extent_contig int the extent tree's
operations vector. So that with the new refcount tree, We want
this so that refcount trees can always return CONTIG_NONE and
prevent extent merging.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:30 -07:00
Tao Ma
8bf396de98 ocfs2: Basic tree root operation.
Add basic refcount tree root operation.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:30 -07:00
Tao Ma
374a263e79 ocfs2: Add refcount tree lock mechanism.
Implement locking around struct ocfs2_refcount_tree.  This protects
all read/write operations on refcount trees.  ocfs2_refcount_tree
has its own lock and its own caching_info, protecting buffers among
multiple nodes.

User must call ocfs2_lock_refcount_tree before his operation on
the tree and unlock it after that.

ocfs2_refcount_trees are referenced by the block number of the
refcount tree root block, So we create an rb-tree on the ocfs2_super
to look them up.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:29 -07:00
Tao Ma
c732eb16bf ocfs2: Add caching info for refcount tree.
refcount tree should use its own caching info so that when
we downconvert the refcount tree lock, we can drop all the
cached buffer head.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:28 -07:00
Tao Ma
8dec98edfe ocfs2: Add new refcount tree lock resource in dlmglue.
refcount tree lock resource is used to protect refcount
tree read/write among multiple nodes.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:28 -07:00
Tao Ma
a433848132 ocfs2: Abstract caching info checkpoint.
In meta downconvert, we need to checkpoint the metadata in an inode.
For refcount tree, we also need it. So abstract the process out.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:27 -07:00
Tao Ma
f2c870e3b1 ocfs2: Add ocfs2_read_refcount_block.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:26 -07:00
Tao Ma
93c97087a6 ocfs2: Add metaecc for ocfs2_refcount_block.
Add metaecc and journal trigger for ocfs2_refcount_block.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:26 -07:00
Tao Ma
721f69c404 ocfs2: Define refcount tree structure.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:25 -07:00
Joel Becker
5e404e9ed1 ocfs2: Pass ocfs2_caching_info into ocfs_init_*_extent_tree().
With this commit, extent tree operations are divorced from inodes and
rely on ocfs2_caching_info.  Phew!

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:08:13 -07:00
Joel Becker
a1cf076ba9 ocfs2: __ocfs2_mark_extent_written() doesn't need struct inode.
We only allow unwritten extents on data, so the toplevel
ocfs2_mark_extent_written() can use an inode all it wants.  But the
subfunction isn't even using the inode argument.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:08:12 -07:00
Joel Becker
f3868d0fa2 ocfs2: Teach ocfs2_replace_extent_rec() to use an extent_tree.
Don't use a struct inode anymore.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:08:11 -07:00
Joel Becker
d231129f44 ocfs2: ocfs2_split_and_insert() no longer needs struct inode.
It already has an extent_tree.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:08:11 -07:00
Joel Becker
dbdcf6a48a ocfs2: ocfs2_remove_extent() no longer needs struct inode.
One more generic btree function that is isolated from struct inode.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:08:10 -07:00
Joel Becker
cbee7e1a6a ocfs2: ocfs2_add_clusters_in_btree() no longer needs struct inode.
One more function that doesn't need a struct inode to pass to its
children.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:08:09 -07:00
Joel Becker
cc79d8c19e ocfs2: ocfs2_insert_extent() no longer needs struct inode.
One more function down, no inode in the entire insert-extent chain.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:08:09 -07:00
Joel Becker
92ba470c44 ocfs2: Make extent map insertion an extent_tree_operation.
ocfs2_insert_extent() wants to insert a record into the extent map if
it's an inode data extent.  But since many btrees can call that
function, let's make it an op on ocfs2_extent_tree.  Other tree types
can leave it empty.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:08:08 -07:00
Joel Becker
627961b77e ocfs2: ocfs2_figure_insert_type() no longer needs struct inode.
It's not using it, so remove it from the parameter list.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:08:08 -07:00
Joel Becker
1ef61b3314 ocfs2: Remove inode from ocfs2_figure_extent_contig().
It already has an ocfs2_extent_tree and doesn't need the inode.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:08:07 -07:00
Joel Becker
a29702914a ocfs2: Swap inode for extent_tree in ocfs2_figure_merge_contig_type().
We don't want struct inode in generic btree operations.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:08:07 -07:00
Joel Becker
b4a176515c ocfs2: ocfs2_extent_contig() only requires the superblock.
Don't pass the inode in.  We don't want it around for generic btree
operations.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:08:05 -07:00
Joel Becker
3505bec018 ocfs2: ocfs2_do_insert_extent() and ocfs2_insert_path() no longer need an inode.
They aren't using it, so remove it from their parameter lists.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:08:05 -07:00
Joel Becker
c38e52bb1c ocfs2: Give ocfs2_split_record() an extent_tree instead of an inode.
Another on the way to generic btree functions.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:08:05 -07:00
Joel Becker
d562862314 ocfs2: ocfs2_insert_at_leaf() doesn't need struct inode.
Give it an ocfs2_extent_tree and it is happy.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:08:04 -07:00
Joel Becker
4c911eefca ocfs2: Make truncating the extent map an extent_tree_operation.
ocfs2_remove_extent() wants to truncate the extent map if it's
truncating an inode data extent.  But since many btrees can call that
function, let's make it an op on ocfs2_extent_tree.  Other tree types
can leave it empty.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:08:03 -07:00
Joel Becker
043beebb6c ocfs2: ocfs2_truncate_rec() doesn't need struct inode.
It's not using it anymore.  Remove it from the parameter list.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:08:03 -07:00
Joel Becker
d401dc12fc ocfs2: ocfs2_grow_branch() and ocfs2_append_rec_to_path() lose struct inode.
ocfs2_grow_branch() not really using it other than to pass it to the
subfunctions ocfs2_shift_tree_depth(), ocfs2_find_branch_target(), and
ocfs2_add_branch().  The first two weren't it either, so they drop the
argument.  ocfs2_add_branch() only passed it to
ocfs2_adjust_rightmost_branch(), which drops the inode argument and uses
the ocfs2_extent_tree as well.

ocfs2_append_rec_to_path() can be take an ocfs2_extent_tree instead of
the inode.  The function ocfs2_adjust_rightmost_records() goes along for
the ride.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:08:02 -07:00
Joel Becker
c495dd24ac ocfs2: ocfs2_try_to_merge_extent() doesn't need struct inode.
It's not using it, so remove it from the parameter list.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:08:02 -07:00
Joel Becker
4fe82c312a ocfs2: ocfs2_merge_rec_left/right() no longer need struct inode.
Drop it from the parameters - they already have ocfs2_extent_list.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:08:01 -07:00
Joel Becker
70f18c08b4 ocfs2: ocfs2_rotate_tree_left() no longer needs struct inode.
It already gets ocfs2_extent_tree, so we can just use that.  This chains
to the same modification for ocfs2_remove_rightmost_path() and
ocfs2_rotate_rightmost_leaf_left().

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:08:00 -07:00
Joel Becker
e46f74dc35 ocfs2: __ocfs2_rotate_tree_left() doesn't need struct inode.
It already has struct ocfs2_extent_tree, which has the caching info.  So
we don't need to pass it struct inode.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:07:59 -07:00
Joel Becker
1e2dd63fe0 ocfs2: ocfs2_rotate_subtree_left() doesn't need struct inode.
It already has struct ocfs2_extent_tree, which has the caching info.  So
we don't need to pass it struct inode.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:07:59 -07:00
Joel Becker
09106bae05 ocfs2: ocfs2_update_edge_lengths() doesn't need struct inode.
Pass in the extent tree, which is all we need.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:07:58 -07:00
Joel Becker
1bbf0b8d60 ocfs2: ocfs2_rotate_tree_right() doesn't need struct inode.
We don't need struct inode in ocfs2_rotate_tree_right() anymore.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:07:58 -07:00
Joel Becker
6136ca5f5f ocfs2: Drop struct inode from ocfs2_extent_tree_operations.
We can get to the inode from the caching information.  Other parent
types don't need it.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:07:57 -07:00
Joel Becker
7dc0280567 ocfs2: Pass ocfs2_extent_tree to ocfs2_get_subtree_root()
Get rid of the inode argument.  Use extent_tree instead.  This means a
few more functions have to pass an extent_tree around.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:07:55 -07:00
Joel Becker
5c601aba8c ocfs2: Get inode out of ocfs2_rotate_subtree_root_right().
Pass the ocfs2_extent_list down through ocfs2_rotate_tree_right() and
get rid of struct inode in ocfs2_rotate_subtree_root_right().

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:07:55 -07:00
Joel Becker
4619c73e7c ocfs2: ocfs2_complete_edge_insert() doesn't need struct inode at all.
Completely unused argument.  Get rid of it.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:07:54 -07:00
Joel Becker
6641b0ce32 ocfs2: Pass ocfs2_extent_tree to ocfs2_unlink_path()
ocfs2_unlink_path() doesn't need struct inode, so let's pass it struct
ocfs2_extent_tree.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-09-04 16:07:54 -07:00