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* ocfs2: Return extent flags for xattr value tree.Tao Ma2009-09-223-5/+11
| | | | | | | | With the new refcount tree, xattr value can also be refcounted among multiple files. So return the appropriate extent flags so that CoW can used it later. Signed-off-by: Tao Ma <tao.ma@oracle.com>
* ocfs2: handle file attributes issue for reflink.Tao Ma2009-09-221-2/+120
| | | | | | | | | | | | | | | | | | | | | | | A reflink creates a snapshot of a file, that means the attributes must be identical except for three exceptions - nlink, ino, and ctime. As for time changes, Here is a brief description: 1. Source file: 1) atime: Ignore. Let the lazy atime code handle that. 2) mtime: don't touch. 3) ctime: If we change the tree (adding REFCOUNTED to at least one extent), update it. 2. Destination file: 1) atime: ignore. 2) mtime: we want it to appear identical to the source. 3) ctime: update. The idea here is that an ls -l will show the same time for the src and target - it shows mtime. Backup software like rsync and tar will treat the new file correctly too. Signed-off-by: Tao Ma <tao.ma@oracle.com>
* ocfs2: Add normal functions for reflink a normal file's extents.Tao Ma2009-09-221-0/+286
| | | | | | | | | | | | | | | | 2 major functions are added in this patch. ocfs2_attach_refcount_tree will create a new refcount tree to the old file if it doesn't have one and insert all the extent records to the tree if they are not refcounted. ocfs2_create_reflink_node will: 1. set the refcount tree to the new file. 2. call ocfs2_duplicate_extent_list which will iterate all the extents for the old file, insert it to the new file and increase the corresponding referennce count. Signed-off-by: Tao Ma <tao.ma@oracle.com>
* ocfs2: CoW a reflinked cluster when it is truncated.Tao Ma2009-09-224-14/+70
| | | | | | | | | | | 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>
* ocfs2: Integrate CoW in file write.Tao Ma2009-09-223-1/+104
| | | | | | | | | 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>
* ocfs2: CoW refcount tree improvement.Tao Ma2009-09-223-28/+81
| | | | | | | | | | | 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>
* ocfs2: Add CoW support.Tao Ma2009-09-226-11/+841
| | | | | | | | | | | | | 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>
* ocfs2: Decrement refcount when truncating refcounted extents.Tao Ma2009-09-224-7/+290
| | | | | | | | 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>
* ocfs2: Add functions for extents refcounted.Tao Ma2009-09-224-6/+58
| | | | | | | Add function ocfs2_mark_extent_refcounted which can mark an extent refcounted. Signed-off-by: Tao Ma <tao.ma@oracle.com>
* ocfs2: Add support of decrementing refcount for delete.Tao Ma2009-09-224-5/+265
| | | | | | | | 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>
* ocfs2: Add support for incrementing refcount in the tree.Tao Ma2009-09-224-7/+1073
| | | | | | | | | 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>
* ocfs2: move tree path functions to alloc.h.Tao Ma2009-09-222-53/+72
| | | | | | | | | | | 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>
* ocfs2: Add refcount b-tree as a new extent tree.Tao Ma2009-09-222-0/+57
| | | | | | | 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>
* ocfs2: Abstract extent split process.Tao Ma2009-09-221-50/+100
| | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* ocfs2: Wrap ocfs2_extent_contig in ocfs2_extent_tree.Tao Ma2009-09-221-16/+41
| | | | | | | | | | 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>
* ocfs2: Basic tree root operation.Tao Ma2009-09-222-6/+353
| | | | | | Add basic refcount tree root operation. Signed-off-by: Tao Ma <tao.ma@oracle.com>
* ocfs2: Add refcount tree lock mechanism.Tao Ma2009-09-224-0/+375
| | | | | | | | | | | | | | | | | 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>
* ocfs2: Add caching info for refcount tree.Tao Ma2009-09-221-0/+59
| | | | | | | | 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>
* ocfs2: Add new refcount tree lock resource in dlmglue.Tao Ma2009-09-224-0/+127
| | | | | | | refcount tree lock resource is used to protect refcount tree read/write among multiple nodes. Signed-off-by: Tao Ma <tao.ma@oracle.com>
* ocfs2: Abstract caching info checkpoint.Tao Ma2009-09-221-5/+13
| | | | | | | 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>
* ocfs2: Add ocfs2_read_refcount_block.Tao Ma2009-09-225-0/+105
| | | | Signed-off-by: Tao Ma <tao.ma@oracle.com>
* ocfs2: Add metaecc for ocfs2_refcount_block.Tao Ma2009-09-222-0/+18
| | | | | | Add metaecc and journal trigger for ocfs2_refcount_block. Signed-off-by: Tao Ma <tao.ma@oracle.com>
* ocfs2: Define refcount tree structure.Tao Ma2009-09-221-3/+85
| | | | Signed-off-by: Tao Ma <tao.ma@oracle.com>
* ocfs2: Pass ocfs2_caching_info into ocfs_init_*_extent_tree().Joel Becker2009-09-046-30/+35
| | | | | | | 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>
* ocfs2: __ocfs2_mark_extent_written() doesn't need struct inode.Joel Becker2009-09-041-4/+3
| | | | | | | | 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>
* ocfs2: Teach ocfs2_replace_extent_rec() to use an extent_tree.Joel Becker2009-09-041-5/+4
| | | | | | Don't use a struct inode anymore. Signed-off-by: Joel Becker <joel.becker@oracle.com>
* ocfs2: ocfs2_split_and_insert() no longer needs struct inode.Joel Becker2009-09-041-6/+5
| | | | | | It already has an extent_tree. Signed-off-by: Joel Becker <joel.becker@oracle.com>
* ocfs2: ocfs2_remove_extent() no longer needs struct inode.Joel Becker2009-09-043-24/+25
| | | | | | One more generic btree function that is isolated from struct inode. Signed-off-by: Joel Becker <joel.becker@oracle.com>
* ocfs2: ocfs2_add_clusters_in_btree() no longer needs struct inode.Joel Becker2009-09-044-19/+14
| | | | | | | One more function that doesn't need a struct inode to pass to its children. Signed-off-by: Joel Becker <joel.becker@oracle.com>
* ocfs2: ocfs2_insert_extent() no longer needs struct inode.Joel Becker2009-09-044-22/+15
| | | | | | One more function down, no inode in the entire insert-extent chain. Signed-off-by: Joel Becker <joel.becker@oracle.com>
* ocfs2: Make extent map insertion an extent_tree_operation.Joel Becker2009-09-041-2/+27
| | | | | | | | | 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>
* ocfs2: ocfs2_figure_insert_type() no longer needs struct inode.Joel Becker2009-09-041-3/+2
| | | | | | It's not using it, so remove it from the parameter list. Signed-off-by: Joel Becker <joel.becker@oracle.com>
* ocfs2: Remove inode from ocfs2_figure_extent_contig().Joel Becker2009-09-041-7/+6
| | | | | | It already has an ocfs2_extent_tree and doesn't need the inode. Signed-off-by: Joel Becker <joel.becker@oracle.com>
* ocfs2: Swap inode for extent_tree in ocfs2_figure_merge_contig_type().Joel Becker2009-09-041-13/+13
| | | | | | We don't want struct inode in generic btree operations. Signed-off-by: Joel Becker <joel.becker@oracle.com>
* ocfs2: ocfs2_extent_contig() only requires the superblock.Joel Becker2009-09-041-6/+6
| | | | | | | 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>
* ocfs2: ocfs2_do_insert_extent() and ocfs2_insert_path() no longer need an inode.Joel Becker2009-09-041-8/+6
| | | | | | They aren't using it, so remove it from their parameter lists. Signed-off-by: Joel Becker <joel.becker@oracle.com>
* ocfs2: Give ocfs2_split_record() an extent_tree instead of an inode.Joel Becker2009-09-041-3/+4
| | | | | | Another on the way to generic btree functions. Signed-off-by: Joel Becker <joel.becker@oracle.com>
* ocfs2: ocfs2_insert_at_leaf() doesn't need struct inode.Joel Becker2009-09-041-9/+10
| | | | | | Give it an ocfs2_extent_tree and it is happy. Signed-off-by: Joel Becker <joel.becker@oracle.com>
* ocfs2: Make truncating the extent map an extent_tree_operation.Joel Becker2009-09-041-6/+31
| | | | | | | | | 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>
* ocfs2: ocfs2_truncate_rec() doesn't need struct inode.Joel Becker2009-09-041-13/+13
| | | | | | It's not using it anymore. Remove it from the parameter list. Signed-off-by: Joel Becker <joel.becker@oracle.com>
* ocfs2: ocfs2_grow_branch() and ocfs2_append_rec_to_path() lose struct inode.Joel Becker2009-09-041-44/+36
| | | | | | | | | | | | | | | 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>
* ocfs2: ocfs2_try_to_merge_extent() doesn't need struct inode.Joel Becker2009-09-041-7/+5
| | | | | | It's not using it, so remove it from the parameter list. Signed-off-by: Joel Becker <joel.becker@oracle.com>
* ocfs2: ocfs2_merge_rec_left/right() no longer need struct inode.Joel Becker2009-09-041-30/+24
| | | | | | Drop it from the parameters - they already have ocfs2_extent_list. Signed-off-by: Joel Becker <joel.becker@oracle.com>
* ocfs2: ocfs2_rotate_tree_left() no longer needs struct inode.Joel Becker2009-09-041-30/+26
| | | | | | | | 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>
* ocfs2: __ocfs2_rotate_tree_left() doesn't need struct inode.Joel Becker2009-09-041-12/+12
| | | | | | | 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>
* ocfs2: ocfs2_rotate_subtree_left() doesn't need struct inode.Joel Becker2009-09-041-9/+9
| | | | | | | 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>
* ocfs2: ocfs2_update_edge_lengths() doesn't need struct inode.Joel Becker2009-09-041-4/+5
| | | | | | Pass in the extent tree, which is all we need. Signed-off-by: Joel Becker <joel.becker@oracle.com>
* ocfs2: ocfs2_rotate_tree_right() doesn't need struct inode.Joel Becker2009-09-041-2/+2
| | | | | | We don't need struct inode in ocfs2_rotate_tree_right() anymore. Signed-off-by: Joel Becker <joel.becker@oracle.com>
* ocfs2: Drop struct inode from ocfs2_extent_tree_operations.Joel Becker2009-09-043-59/+44
| | | | | | | 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>
* ocfs2: Pass ocfs2_extent_tree to ocfs2_get_subtree_root()Joel Becker2009-09-041-25/+27
| | | | | | | 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>
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