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* ocfs2: Use BUG_ONJulia Lawall2008-04-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | if (...) BUG(); should be replaced with BUG_ON(...) when the test has no side-effects to allow a definition of BUG_ON that drops the code completely. The semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @ disable unlikely @ expression E,f; @@ ( if (<... f(...) ...>) { BUG(); } | - if (unlikely(E)) { BUG(); } + BUG_ON(E); ) @@ expression E,f; @@ ( if (<... f(...) ...>) { BUG(); } | - if (E) { BUG(); } + BUG_ON(E); ) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
* ocfs2: Add inode stealing for ocfs2_reserve_new_inodeTao Ma2008-04-18
| | | | | | | | | | Inode allocation is modified to look in other nodes allocators during extreme out of space situations. We retry our own slot when space is freed back to the global bitmap, or whenever we've allocated more than 1024 inodes from another slot. Signed-off-by: Tao Ma <tao.ma@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
* ocfs2: Enable cross extent block merge.Tao Ma2008-04-18
| | | | | | | | | In ocfs2_figure_merge_contig_type, we judge whether there exists a cross extent block merge and enable it by setting CONTIG_LEFT and CONTIG_RIGHT accordingly. Signed-off-by: Tao Ma <tao.ma@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
* ocfs2: Add support for cross extent blockTao Ma2008-04-18
| | | | | | | | | | | | | | | | | In ocfs2_merge_rec_left, when we find the merge extent is "CONTIG_RIGHT" with the first extent record of the next extent block, we will merge it to the next extent block and change all the related extent blocks accordingly. In ocfs2_merge_rec_right, when we find the merge extent is "CONTIG_LEFT" with the last extent record of the previous extent block, we will merge it to the prevoius extent block and change all the related extent blocks accordingly. As for CONTIG_LEFTRIGHT, we will handle CONTIG_RIGHT first so that when the index is zero, the merge process will be more efficient and easier. Signed-off-by: Tao Ma <tao.ma@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
* Pagecache zeroing: zero_user_segment, zero_user_segments and zero_userChristoph Lameter2008-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Simplify page cache zeroing of segments of pages through 3 functions zero_user_segments(page, start1, end1, start2, end2) Zeros two segments of the page. It takes the position where to start and end the zeroing which avoids length calculations and makes code clearer. zero_user_segment(page, start, end) Same for a single segment. zero_user(page, start, length) Length variant for the case where we know the length. We remove the zero_user_page macro. Issues: 1. Its a macro. Inline functions are preferable. 2. The KM_USER0 macro is only defined for HIGHMEM. Having to treat this special case everywhere makes the code needlessly complex. The parameter for zeroing is always KM_USER0 except in one single case that we open code. Avoiding KM_USER0 makes a lot of code not having to be dealing with the special casing for HIGHMEM anymore. Dealing with kmap is only necessary for HIGHMEM configurations. In those configurations we use KM_USER0 like we do for a series of other functions defined in highmem.h. Since KM_USER0 is depends on HIGHMEM the existing zero_user_page function could not be a macro. zero_user_* functions introduced here can be be inline because that constant is not used when these functions are called. Also extract the flushing of the caches to be outside of the kmap. [akpm@linux-foundation.org: fix nfs and ntfs build] [akpm@linux-foundation.org: fix ntfs build some more] Signed-off-by: Christoph Lameter <clameter@sgi.com> Cc: Steven French <sfrench@us.ibm.com> Cc: Michael Halcrow <mhalcrow@us.ibm.com> Cc: <linux-ext4@vger.kernel.org> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Anton Altaparmakov <aia21@cantab.net> Cc: Mark Fasheh <mark.fasheh@oracle.com> Cc: David Chinner <dgc@sgi.com> Cc: Michael Halcrow <mhalcrow@us.ibm.com> Cc: Steven French <sfrench@us.ibm.com> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fs/: Spelling fixesJoe Perches2008-02-03
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
* ocfs2: Rename ocfs2_meta_[un]lockMark Fasheh2008-01-25
| | | | | | | Call this the "inode_lock" now, since it covers both data and meta data. This patch makes no functional changes. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: Re-journal buffers after transaction extendMark Fasheh2007-12-17
| | | | | | | | | ocfs2_extend_trans() might call journal_restart() which will commit dirty buffers and then restart the transaction. This means that any buffers which still need changes should be passed to journal_access() again. Some paths during extend weren't doing this right. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: Don't panic when truncating an empty extentMark Fasheh2007-12-17
| | | | | | | This BUG_ON() was unintentionally left in after the sparse file support was written. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* [PATCH] Fix priority mistakes in fs/ocfs2/{alloc.c, dlmglue.c}Roel Kluin2007-11-06
| | | | | | | Fixes priority mistakes similar to '!x & y' Signed-off-by: Roel Kluin <12o3l@tiscali.nl> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: Write support for directories with inline dataMark Fasheh2007-10-12
| | | | | | | | | | | | | Create all new directories with OCFS2_INLINE_DATA_FL and the inline data bytes formatted as an empty directory. Inode size field reflects the actual amount of inline data available, which makes searching for dirent space very similar to the regular directory search. Inline-data directories are automatically pushed out to extents on any insert request which is too large for the available space. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com> Reviewed-by: Joel Becker <joel.becker@oracle.com>
* ocfs2: Write support for inline dataMark Fasheh2007-10-12
| | | | | | | | | | | | | | | | | | This fixes up write, truncate, mmap, and RESVSP/UNRESVP to understand inline inode data. For the most part, the changes to the core write code can be relied on to do the heavy lifting. Any code calling ocfs2_write_begin (including shared writeable mmap) can count on it doing the right thing with respect to growing inline data to an extent tree. Size reducing truncates, including UNRESVP can simply zero that portion of the inode block being removed. Size increasing truncatesm, including RESVP have to be a little bit smarter and grow the inode to an extent tree if necessary. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com> Reviewed-by: Joel Becker <joel.becker@oracle.com>
* ocfs2: Small refactor of truncate zeroing codeMark Fasheh2007-10-12
| | | | | | | | | | | | | | | | | | | We'll want to reuse most of this when pushing inline data back out to an extent. Keeping this part as a seperate patch helps to keep the upcoming changes for write support uncluttered. The core portion of ocfs2_zero_cluster_pages() responsible for making sure a page is mapped and properly dirtied is abstracted out into it's own function, ocfs2_map_and_dirty_page(). Actual functionality doesn't change, though zeroing becomes optional. We also turn part of ocfs2_free_write_ctxt() into a common function for unlocking and freeing a page array. This operation is very common (and uniform) for Ocfs2 cluster sizes greater than page size, so it makes sense to keep the code in one place. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com> Reviewed-by: Joel Becker <joel.becker@oracle.com>
* ocfs2: Remove unused structure fieldMark Fasheh2007-10-12
| | | | | | | c_used_tail_recs in struct ocfs2_merge_ctxt is only ever set, so we can remove it. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: remove unused variableTao Mao2007-10-12
| | | | | | | | delete_tail_recs in ocfs2_try_to_merge_extent() was only ever set, remove it. Signed-off-by: Tao Mao <tao.ma@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: remove mostly unused field from insert structureTao Mao2007-10-12
| | | | | | | | | | | ocfs2_insert_type->ins_free_records was only used in one place, and was set incorrectly in most places. We can free up some memory and lose some code by removing this. * Small warning fixup contributed by Andrew Mortom <akpm@linux-foundation.org> Signed-off-by: Tao Mao <tao.ma@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: Fix calculation of i_blocks during truncateMark Fasheh2007-09-11
| | | | | | | We were setting i_blocks too early - before truncating any allocation. Correct things to set i_blocks after the allocation change. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* [2.6 patch] ocfs2_insert_extent(): remove dead codeAdrian Bunk2007-08-09
| | | | | | | | | This patch removes some now dead code. Spotted by the Coverity checker. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: support for removing file regionsMark Fasheh2007-07-10
| | | | | | | | | | 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>
* ocfs2: update truncate handling of partial clustersMark Fasheh2007-07-10
| | | | | | | | | 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>
* ocfs2: btree support for removal of arbirtrary extentsMark Fasheh2007-07-10
| | | | | | | | | Add code to the btree paths to support the removal of arbitrary regions within an existing extent. With proper higher level support this can be used to "punch holes" in a file. Truncate (a special case of hole punching) could also be converted to use these methods. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: Support creation of unwritten extentsMark Fasheh2007-07-10
| | | | | | | | | | 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>
* ocfs2: btree changes for unwritten extentsMark Fasheh2007-07-10
| | | | | | | | | 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>
* ocfs2: abstract btree growing callsMark Fasheh2007-07-10
| | | | | | | | | The top level calls and logic for growing a tree can easily be abstracted out of ocfs2_insert_extent() into a seperate function - ocfs2_grow_tree(). This allows future code to easily grow btrees when needed. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: use all extent block suballocatorsMark Fasheh2007-07-10
| | | | | | | Now that we have a method to deallocate blocks from them, each node should allocate extent blocks from their local suballocator file. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: plug truncate into cached dealloc routinesMark Fasheh2007-07-10
| | | | Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: simplify deallocation lockingMark Fasheh2007-07-10
| | | | | | | | | | | | | | 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>
* ocfs2: take ip_alloc_sem during entire truncateMark Fasheh2007-07-10
| | | | | | | Use of the alloc sem during truncate was too narrow - we want to protect the i_size change and page truncation against mmap now. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: fix sparse warnings in fs/ocfs2Mark Fasheh2007-05-02
| | | | | | | None of these are actually harmful, but the noise makes looking for real problems difficult. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: Cache extent recordsMark Fasheh2007-04-26
| | | | | | | | | | | | | | | The extent map code was ripped out earlier because of an inability to deal with holes. This patch adds back a simpler caching scheme requiring far less code. Our old extent map caching was designed back when meta data block caching in Ocfs2 didn't work very well, resulting in many disk reads. These days our metadata caching is much better, resulting in no un-necessary disk reads. As a result, extent caching doesn't have to be as fancy, nor does it have to cache as many extents. Keeping the last 3 extents seen should be sufficient to give us a small performance boost on some streaming workloads. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: Read from an unwritten extent returns zerosMark Fasheh2007-04-26
| | | | | | | | Return an optional extent flags field from our lookup functions and wire up callers to treat unwritten regions as holes for the purpose of returning zeros to the user. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: make room for unwritten extents flagMark Fasheh2007-04-26
| | | | | | | | | | 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>
* ocfs2: Use do_sync_mapping_range() in ocfs2_zero_tail_for_truncate()Mark Fasheh2007-04-26
| | | | | | | Do this instead of filemap_fdatawrite() - this way we sync only the range between i_size and the cluster boundary. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: zero tail of sparse files on truncateMark Fasheh2007-04-26
| | | | | | | | | | 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>
* ocfs2: teach extend/truncate about sparse filesMark Fasheh2007-04-26
| | | | | | | | | | | | | | | | | For ocfs2_truncate_file(), we eliminate the "simple" truncate case which no longer exists since i_size is not tied to i_clusters. In ocfs2_extend_file(), we skip the allocation / page zeroing code for file systems which understand sparse files. The core truncate code is changed to do a bottom up tree traversal. This gets abstracted out into it's own function. To make things more readable, most of the special case handling for in-inode extents from ocfs2_do_truncate() is also removed. Though write support for sparse files comes in a later patch, we at least update ocfs2_prepare_inode_for_write() to skip allocation for sparse files. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: temporarily remove extent map cachingMark Fasheh2007-04-26
| | | | | | | | | | | 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>
* ocfs2: sparse b-tree supportMark Fasheh2007-04-26
| | | | | | | | | | | | 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>
* [PATCH] Fix numerous kcalloc() calls, convert to kzalloc()Robert P. J. Day2006-12-13
| | | | | | | | | | | | | | | | | | | All kcalloc() calls of the form "kcalloc(1,...)" are converted to the equivalent kzalloc() calls, and a few kcalloc() calls with the incorrect ordering of the first two arguments are fixed. Signed-off-by: Robert P. J. Day <rpjday@mindspring.com> Cc: Jeff Garzik <jeff@garzik.org> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Adam Belay <ambx1@neo.rr.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Greg KH <greg@kroah.com> Cc: Mark Fasheh <mark.fasheh@oracle.com> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge branch 'master' of ↵David Howells2006-12-05
|\ | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 Conflicts: drivers/ata/libata-scsi.c include/linux/libata.h Futher merge of Linus's head and compilation fixups. Signed-Off-By: David Howells <dhowells@redhat.com>
| * ocfs2: Remove struct ocfs2_journal_handle in favor of handle_tMark Fasheh2006-12-01
| | | | | | | | | | | | | | | | | | | | 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>
| * ocfs2: remove handle argument to ocfs2_start_trans()Mark Fasheh2006-12-01
| | | | | | | | | | | | | | | | | | All callers either pass in NULL directly, or a local variable that is already set to NULL. The internals of ocfs2_start_trans() get a nice cleanup as a result. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
| * ocfs2: pass ocfs2_super * into ocfs2_commit_trans()Mark Fasheh2006-12-01
| | | | | | | | | | | | This sets us up to remove handle->journal. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
| * ocfs2: remove unused handle argument from ocfs2_meta_lock_full()Mark Fasheh2006-12-01
| | | | | | | | | | | | Now that this is unused and all callers pass NULL, we can safely remove it. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
| * ocfs2: don't pass handle to ocfs2_meta_lock() in __ocfs2_flush_truncate_log()Mark Fasheh2006-12-01
| | | | | | | | | | | | Take and drop the locks directly. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
| * ocfs2: have ocfs2_extend_trans() take handle_tMark Fasheh2006-12-01
| | | | | | | | | | | | | | | | | | | | No reason to use our wrapper struct in this function, so take the handle_t directly. Also fixes a bug where we were incorrectly setting the handle to NULL in case of a failure from journal_restart() Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* | WorkStruct: make allyesconfigDavid Howells2006-11-22
|/ | | | | | Fix up for make allyesconfig. Signed-Off-By: David Howells <dhowells@redhat.com>
* ocfs2: Remove overzealous BUG_ON()Mark Fasheh2006-09-20
| | | | | | | | | The truncate code was never supposed to BUG() on an allocator it doesn't know about, but rather to ignore it. Right now, this does nothing, but when we change our allocation paths to use all suballocator files, this will allow current versions of the fs module to work fine. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* ocfs2: don't use MLF* in the file systemMark Fasheh2006-03-24
| | | | Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* [PATCH] mutex subsystem, semaphore to mutex: VFS, ->i_semJes Sorensen2006-01-09
| | | | | | | | | | | | | This patch converts the inode semaphore to a mutex. I have tested it on XFS and compiled as much as one can consider on an ia64. Anyway your luck with it might be different. Modified-by: Ingo Molnar <mingo@elte.hu> (finished the conversion) Signed-off-by: Jes Sorensen <jes@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* [PATCH] OCFS2: The Second Oracle Cluster FilesystemMark Fasheh2006-01-03
The OCFS2 file system module. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com> Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com>
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