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path: root/fs/ocfs2/alloc.h
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2007-07-10ocfs2: support for removing file regionsMark Fasheh
Provide an internal interface for the removal of arbitrary file regions. ocfs2_remove_inode_range() takes a byte range within a file and will remove existing extents within that range. Partial clusters will be zeroed so that any read from within the region will return zeros. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2007-07-10ocfs2: update truncate handling of partial clustersMark Fasheh
The partial cluster zeroing code used during truncate usually assumes that the rightmost byte in the range to be zeroed lies on a cluster boundary. This makes sense for truncate, but punching holes might require zeroing on non-aligned rightmost boundaries. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2007-07-10ocfs2: Support creation of unwritten extentsMark Fasheh
This can now be trivially supported with re-use of our existing extend code. ocfs2_allocate_unwritten_extents() takes a start offset and a byte length and iterates over the inode, adding extents (marked as unwritten) until len is reached. Existing extents are skipped over. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2007-07-10ocfs2: btree changes for unwritten extentsMark Fasheh
Writes to a region marked as unwritten might result in a record split or merge. We can support splits by making minor changes to the existing insert code. Merges require left rotations which mostly re-use right rotation support functions. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2007-07-10ocfs2: plug truncate into cached dealloc routinesMark Fasheh
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2007-07-10ocfs2: simplify deallocation lockingMark Fasheh
Deallocation of suballocator blocks, most notably extent blocks, might involve multiple suballocator inodes. The locking for this can get extremely complicated, especially when the suballocator inodes to delete from aren't known until deep within an unrelated codepath. Implement a simple scheme for recording the blocks to be unlinked so that the actual deallocation can be done in a context which won't deadlock. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2007-04-26ocfs2: make room for unwritten extents flagMark Fasheh
Due to the size of our group bitmaps, we'll never have a leaf node extent record with more than 16 bits worth of clusters. Split e_clusters up so that leaf nodes can get a flags field where we can mark unwritten extents. Interior nodes whose length references all the child nodes beneath it can't split their e_clusters field, so we use a union to preserve sizing there. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2007-04-26ocfs2: zero tail of sparse files on truncateMark Fasheh
Since we don't zero on extend anymore, truncate needs to be fixed up to zero the part of a file between i_size and and end of it's cluster. Otherwise a subsequent extend could expose bad data. This introduced a new helper, which can be used in ocfs2_write(). Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2007-04-26ocfs2: temporarily remove extent map cachingMark Fasheh
The code in extent_map.c is not prepared to deal with a subtree being rotated between lookups. This can happen when filling holes in sparse files. Instead of a lengthy patch to update the code (which would likely lose the benefit of caching subtree roots), we remove most of the algorithms and implement a simple path based lookup. A less ambitious extent caching scheme will be added in a later patch. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2007-04-26ocfs2: sparse b-tree supportMark Fasheh
Introduce tree rotations into the b-tree code. This will allow ocfs2 to support sparse files. Much of the added code is designed to be generic (in the ocfs2 sense) so that it can later be re-used to implement large extended attributes. This patch only adds the rotation code and does minimal updates to callers of the extent api. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2006-12-01ocfs2: Remove struct ocfs2_journal_handle in favor of handle_tMark Fasheh
This is mostly a search and replace as ocfs2_journal_handle is now no more than a container for a handle_t pointer. ocfs2_commit_trans() becomes very straight forward, and we remove some out of date comments / code. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2006-01-03[PATCH] OCFS2: The Second Oracle Cluster FilesystemMark Fasheh
The OCFS2 file system module. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com> Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com>