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15 years agoocfs2: Abstract duplicate clusters process in CoW.
Tao Ma [Mon, 24 Aug 2009 06:31:03 +0000 (14:31 +0800)]
ocfs2: Abstract duplicate clusters process in CoW.

We currently use pagecache to duplicate clusters in CoW,
but it isn't suitable for xattr case. So abstract it out
so that the caller can decide which method it use.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
15 years agoocfs2: Return extent flags for xattr value tree.
Tao Ma [Tue, 18 Aug 2009 03:41:57 +0000 (11:41 +0800)]
ocfs2: Return extent flags for xattr value tree.

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>
15 years agoocfs2: handle file attributes issue for reflink.
Tao Ma [Tue, 18 Aug 2009 03:40:59 +0000 (11:40 +0800)]
ocfs2: handle file attributes issue for reflink.

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>
15 years agoocfs2: Add normal functions for reflink a normal file's extents.
Tao Ma [Sat, 22 Aug 2009 15:54:27 +0000 (23:54 +0800)]
ocfs2: Add normal functions for reflink a normal file's extents.

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>
15 years agoocfs2: CoW a reflinked cluster when it is truncated.
Tao Ma [Wed, 26 Aug 2009 01:47:28 +0000 (09:47 +0800)]
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>
15 years agoocfs2: Integrate CoW in file write.
Tao Ma [Tue, 25 Aug 2009 00:02:48 +0000 (08:02 +0800)]
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>
15 years agoocfs2: CoW refcount tree improvement.
Tao Ma [Tue, 18 Aug 2009 03:30:55 +0000 (11:30 +0800)]
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>
15 years agoocfs2: Add CoW support.
Tao Ma [Tue, 25 Aug 2009 00:05:12 +0000 (08:05 +0800)]
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>
15 years agoocfs2: Decrement refcount when truncating refcounted extents.
Tao Ma [Tue, 18 Aug 2009 03:29:12 +0000 (11:29 +0800)]
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>
15 years agoocfs2: Add functions for extents refcounted.
Tao Ma [Tue, 18 Aug 2009 03:28:39 +0000 (11:28 +0800)]
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>
15 years agoocfs2: Add support of decrementing refcount for delete.
Tao Ma [Tue, 18 Aug 2009 03:24:49 +0000 (11:24 +0800)]
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>
15 years agoocfs2: Add support for incrementing refcount in the tree.
Tao Ma [Tue, 11 Aug 2009 06:33:14 +0000 (14:33 +0800)]
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>
15 years agoocfs2: move tree path functions to alloc.h.
Tao Ma [Tue, 18 Aug 2009 03:22:34 +0000 (11:22 +0800)]
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>
15 years agoocfs2: Add refcount b-tree as a new extent tree.
Tao Ma [Tue, 18 Aug 2009 03:22:25 +0000 (11:22 +0800)]
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>
15 years agoocfs2: Abstract extent split process.
Tao Ma [Tue, 18 Aug 2009 03:22:21 +0000 (11:22 +0800)]
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>
15 years agoocfs2: Wrap ocfs2_extent_contig in ocfs2_extent_tree.
Tao Ma [Tue, 18 Aug 2009 03:22:18 +0000 (11:22 +0800)]
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>
15 years agoocfs2: Basic tree root operation.
Tao Ma [Mon, 24 Aug 2009 03:12:02 +0000 (11:12 +0800)]
ocfs2: Basic tree root operation.

Add basic refcount tree root operation.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
15 years agoocfs2: Add refcount tree lock mechanism.
Tao Ma [Mon, 24 Aug 2009 03:13:37 +0000 (11:13 +0800)]
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>
15 years agoocfs2: Add caching info for refcount tree.
Tao Ma [Tue, 18 Aug 2009 03:21:00 +0000 (11:21 +0800)]
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>
15 years agoocfs2: Add new refcount tree lock resource in dlmglue.
Tao Ma [Tue, 18 Aug 2009 03:19:58 +0000 (11:19 +0800)]
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>
15 years agoocfs2: Abstract caching info checkpoint.
Tao Ma [Tue, 18 Aug 2009 03:19:29 +0000 (11:19 +0800)]
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>
15 years agoocfs2: Add ocfs2_read_refcount_block.
Tao Ma [Tue, 18 Aug 2009 03:19:26 +0000 (11:19 +0800)]
ocfs2: Add ocfs2_read_refcount_block.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
15 years agoocfs2: Add metaecc for ocfs2_refcount_block.
Tao Ma [Tue, 18 Aug 2009 03:19:20 +0000 (11:19 +0800)]
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>
15 years agoocfs2: Define refcount tree structure.
Tao Ma [Tue, 18 Aug 2009 03:17:49 +0000 (11:17 +0800)]
ocfs2: Define refcount tree structure.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
15 years agoocfs2: Pass ocfs2_caching_info into ocfs_init_*_extent_tree().
Joel Becker [Fri, 13 Feb 2009 11:54:22 +0000 (03:54 -0800)]
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>
15 years agoocfs2: __ocfs2_mark_extent_written() doesn't need struct inode.
Joel Becker [Fri, 13 Feb 2009 11:45:49 +0000 (03:45 -0800)]
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>
15 years agoocfs2: Teach ocfs2_replace_extent_rec() to use an extent_tree.
Joel Becker [Wed, 18 Feb 2009 03:46:04 +0000 (19:46 -0800)]
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>
15 years agoocfs2: ocfs2_split_and_insert() no longer needs struct inode.
Joel Becker [Fri, 13 Feb 2009 11:43:22 +0000 (03:43 -0800)]
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>
15 years agoocfs2: ocfs2_remove_extent() no longer needs struct inode.
Joel Becker [Fri, 13 Feb 2009 11:41:26 +0000 (03:41 -0800)]
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>
15 years agoocfs2: ocfs2_add_clusters_in_btree() no longer needs struct inode.
Joel Becker [Fri, 13 Feb 2009 11:34:15 +0000 (03:34 -0800)]
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>
15 years agoocfs2: ocfs2_insert_extent() no longer needs struct inode.
Joel Becker [Fri, 13 Feb 2009 11:24:43 +0000 (03:24 -0800)]
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>
15 years agoocfs2: Make extent map insertion an extent_tree_operation.
Joel Becker [Fri, 13 Feb 2009 11:18:34 +0000 (03:18 -0800)]
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>
15 years agoocfs2: ocfs2_figure_insert_type() no longer needs struct inode.
Joel Becker [Fri, 13 Feb 2009 11:14:38 +0000 (03:14 -0800)]
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>
15 years agoocfs2: Remove inode from ocfs2_figure_extent_contig().
Joel Becker [Fri, 13 Feb 2009 11:12:33 +0000 (03:12 -0800)]
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>
15 years agoocfs2: Swap inode for extent_tree in ocfs2_figure_merge_contig_type().
Joel Becker [Fri, 13 Feb 2009 11:09:54 +0000 (03:09 -0800)]
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>
15 years agoocfs2: ocfs2_extent_contig() only requires the superblock.
Joel Becker [Fri, 13 Feb 2009 11:07:09 +0000 (03:07 -0800)]
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>
15 years agoocfs2: ocfs2_do_insert_extent() and ocfs2_insert_path() no longer need an inode.
Joel Becker [Fri, 13 Feb 2009 10:57:58 +0000 (02:57 -0800)]
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>
15 years agoocfs2: Give ocfs2_split_record() an extent_tree instead of an inode.
Joel Becker [Fri, 13 Feb 2009 10:56:23 +0000 (02:56 -0800)]
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>
15 years agoocfs2: ocfs2_insert_at_leaf() doesn't need struct inode.
Joel Becker [Fri, 13 Feb 2009 10:54:36 +0000 (02:54 -0800)]
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>
15 years agoocfs2: Make truncating the extent map an extent_tree_operation.
Joel Becker [Fri, 13 Feb 2009 10:50:12 +0000 (02:50 -0800)]
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>
15 years agoocfs2: ocfs2_truncate_rec() doesn't need struct inode.
Joel Becker [Fri, 13 Feb 2009 10:42:30 +0000 (02:42 -0800)]
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>
15 years agoocfs2: ocfs2_grow_branch() and ocfs2_append_rec_to_path() lose struct inode.
Joel Becker [Fri, 13 Feb 2009 10:24:10 +0000 (02:24 -0800)]
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>
15 years agoocfs2: ocfs2_try_to_merge_extent() doesn't need struct inode.
Joel Becker [Fri, 13 Feb 2009 10:19:11 +0000 (02:19 -0800)]
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>
15 years agoocfs2: ocfs2_merge_rec_left/right() no longer need struct inode.
Joel Becker [Fri, 13 Feb 2009 10:16:08 +0000 (02:16 -0800)]
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>
15 years agoocfs2: ocfs2_rotate_tree_left() no longer needs struct inode.
Joel Becker [Fri, 13 Feb 2009 10:09:31 +0000 (02:09 -0800)]
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>
15 years agoocfs2: __ocfs2_rotate_tree_left() doesn't need struct inode.
Joel Becker [Fri, 13 Feb 2009 03:47:43 +0000 (19:47 -0800)]
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>
15 years agoocfs2: ocfs2_rotate_subtree_left() doesn't need struct inode.
Joel Becker [Fri, 13 Feb 2009 03:45:28 +0000 (19:45 -0800)]
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>
15 years agoocfs2: ocfs2_update_edge_lengths() doesn't need struct inode.
Joel Becker [Fri, 13 Feb 2009 03:43:57 +0000 (19:43 -0800)]
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>
15 years agoocfs2: ocfs2_rotate_tree_right() doesn't need struct inode.
Joel Becker [Fri, 13 Feb 2009 03:42:08 +0000 (19:42 -0800)]
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>
15 years agoocfs2: Drop struct inode from ocfs2_extent_tree_operations.
Joel Becker [Fri, 13 Feb 2009 03:32:43 +0000 (19:32 -0800)]
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>
15 years agoocfs2: Pass ocfs2_extent_tree to ocfs2_get_subtree_root()
Joel Becker [Fri, 13 Feb 2009 03:20:13 +0000 (19:20 -0800)]
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>
15 years agoocfs2: Get inode out of ocfs2_rotate_subtree_root_right().
Joel Becker [Fri, 13 Feb 2009 03:10:13 +0000 (19:10 -0800)]
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>
15 years agoocfs2: ocfs2_complete_edge_insert() doesn't need struct inode at all.
Joel Becker [Fri, 13 Feb 2009 03:02:36 +0000 (19:02 -0800)]
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>
15 years agoocfs2: Pass ocfs2_extent_tree to ocfs2_unlink_path()
Joel Becker [Fri, 13 Feb 2009 02:57:52 +0000 (18:57 -0800)]
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>
15 years agoocfs2: ocfs2_create_new_meta_bhs() doesn't need struct inode.
Joel Becker [Fri, 13 Feb 2009 02:49:19 +0000 (18:49 -0800)]
ocfs2: ocfs2_create_new_meta_bhs() doesn't need struct inode.

Pass struct ocfs2_extent_tree into ocfs2_create_new_meta_bhs().  It no
longer needs struct inode or ocfs2_super.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: ocfs2_find_path() only needs the caching info
Joel Becker [Fri, 13 Feb 2009 02:08:48 +0000 (18:08 -0800)]
ocfs2: ocfs2_find_path() only needs the caching info

ocfs2_find_path and ocfs2_find_leaf() walk our btrees, reading extent
blocks.  They need struct ocfs2_caching_info for that, but not struct
inode.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Pass ocfs2_caching_info to ocfs2_read_extent_block().
Joel Becker [Fri, 13 Feb 2009 01:49:26 +0000 (17:49 -0800)]
ocfs2: Pass ocfs2_caching_info to ocfs2_read_extent_block().

extent blocks belong to btrees on more than just inodes, so we want to
pass the ocfs2_caching_info structure directly to
ocfs2_read_extent_block().  A number of places in alloc.c can now drop
struct inode from their argument list.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Store the ocfs2_caching_info on ocfs2_extent_tree.
Joel Becker [Fri, 13 Feb 2009 01:32:34 +0000 (17:32 -0800)]
ocfs2: Store the ocfs2_caching_info on ocfs2_extent_tree.

What do we cache?  Metadata blocks.  What are most of our non-inode metadata
blocks?  Extent blocks for our btrees.  struct ocfs2_extent_tree is the
main structure for managing those.  So let's store the associated
ocfs2_caching_info there.

This means that ocfs2_et_root_journal_access() doesn't need struct inode
anymore, and any place that has an et can refer to et->et_ci instead of
INODE_CACHE(inode).

Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Pass struct ocfs2_caching_info to the journal functions.
Joel Becker [Fri, 13 Feb 2009 00:41:25 +0000 (16:41 -0800)]
ocfs2: Pass struct ocfs2_caching_info to the journal functions.

The next step in divorcing metadata I/O management from struct inode is
to pass struct ocfs2_caching_info to the journal functions.  Thus the
journal locks a metadata cache with the cache io_lock function.  It also
can compare ci_last_trans and ci_created_trans directly.

This is a large patch because of all the places we change
ocfs2_journal_access..(handle, inode, ...) to
ocfs2_journal_access..(handle, INODE_CACHE(inode), ...).

Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: move ip_created_trans to struct ocfs2_caching_info
Joel Becker [Thu, 12 Feb 2009 23:41:59 +0000 (15:41 -0800)]
ocfs2: move ip_created_trans to struct ocfs2_caching_info

Similar ip_last_trans, ip_created_trans tracks the creation of a journal
managed inode.  This specifically tracks what transaction created the
inode.  This is so the code can know if the inode has ever been written
to disk.

This behavior is desirable for any journal managed object.  We move it
to struct ocfs2_caching_info as ci_created_trans so that any object
using ocfs2_caching_info can rely on this behavior.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: move ip_last_trans to struct ocfs2_caching_info
Joel Becker [Thu, 12 Feb 2009 23:24:40 +0000 (15:24 -0800)]
ocfs2: move ip_last_trans to struct ocfs2_caching_info

We have the read side of metadata caching isolated to struct
ocfs2_caching_info, now we need the write side.  This means the journal
functions.  The journal only does a couple of things with struct inode.

This change moves the ip_last_trans field onto struct
ocfs2_caching_info as ci_last_trans.  This field tells the journal
whether a pending journal flush is required.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Take the inode out of the metadata read/write paths.
Joel Becker [Wed, 11 Feb 2009 04:00:41 +0000 (20:00 -0800)]
ocfs2: Take the inode out of the metadata read/write paths.

We are really passing the inode into the ocfs2_read/write_blocks()
functions to get at the metadata cache.  This commit passes the cache
directly into the metadata block functions, divorcing them from the
inode.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Change metadata caching locks to an operations structure.
Joel Becker [Wed, 11 Feb 2009 03:00:37 +0000 (19:00 -0800)]
ocfs2: Change metadata caching locks to an operations structure.

We don't really want to cart around too many new fields on the
ocfs2_caching_info structure.  So let's wrap all our access of the
parent object in a set of operations.  One pointer on caching_info, and
more flexibility to boot.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Make the ocfs2_caching_info structure self-contained.
Joel Becker [Wed, 11 Feb 2009 00:05:07 +0000 (16:05 -0800)]
ocfs2: Make the ocfs2_caching_info structure self-contained.

We want to use the ocfs2_caching_info structure in places that are not
inodes.  To do that, it can no longer rely on referencing the inode
directly.

This patch moves the flags to ocfs2_caching_info->ci_flags, stores
pointers to the parent's locks on the ocfs2_caching_info, and renames
the constants and flags to reflect its independant state.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: ocfs2_write_begin_nolock() should handle len=0
Sunil Mushran [Fri, 4 Sep 2009 18:12:01 +0000 (11:12 -0700)]
ocfs2: ocfs2_write_begin_nolock() should handle len=0

Bug introduced by mainline commit e7432675f8ca868a4af365759a8d4c3779a3d922
The bug causes ocfs2_write_begin_nolock() to oops when len=0.

Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Cc: stable@kernel.org
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: invalidate dentry if its dentry_lock isn't initialized.
Tao Ma [Thu, 27 Aug 2009 06:46:56 +0000 (14:46 +0800)]
ocfs2: invalidate dentry if its dentry_lock isn't initialized.

In commit a5a0a630922a2f6a774b6dac19f70cb5abd86bb0, when
ocfs2_attch_dentry_lock fails, we call an extra iput and reset
dentry->d_fsdata to NULL. This resolve a bug, but it isn't
completed and the dentry is still there. When we want to use
it again, ocfs2_dentry_revalidate doesn't catch it and return
true. That make future ocfs2_dentry_lock panic out.
One bug is http://oss.oracle.com/bugzilla/show_bug.cgi?id=1162.

The resolution is to add a check for dentry->d_fsdata in
revalidate process and return false if dentry->d_fsdata is NULL,
so that a new ocfs2_lookup will be called again.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2/dlm: Wait on lockres instead of erroring cancel requests
Goldwyn Rodrigues [Thu, 20 Aug 2009 18:43:19 +0000 (13:43 -0500)]
ocfs2/dlm: Wait on lockres instead of erroring cancel requests

In case a downconvert is queued, and a flock receives a signal,
BUG_ON(lockres->l_action != OCFS2_AST_INVALID) is triggered
because a lock cancel triggers a dlmunlock while an AST is
scheduled.

To avoid this, allow a LKM_CANCEL to pass through, and let it
wait on __dlm_wait_on_lockres().

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.de>
Acked-off-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Add missing lock name
Jan Kara [Thu, 20 Aug 2009 16:26:52 +0000 (18:26 +0200)]
ocfs2: Add missing lock name

There is missing name for NFSSync cluster lock. This makes lockdep unhappy
because we end up passing NULL to lockdep when initializing lock key. Fix it.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Don't oops in ocfs2_kill_sb on a failed mount
Jan Kara [Thu, 30 Jul 2009 15:01:53 +0000 (17:01 +0200)]
ocfs2: Don't oops in ocfs2_kill_sb on a failed mount

If we fail to mount the filesystem, we have to be careful not to dereference
uninitialized structures in ocfs2_kill_sb.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: release the buffer head in ocfs2_do_truncate.
Tao Ma [Wed, 12 Aug 2009 06:42:47 +0000 (14:42 +0800)]
ocfs2: release the buffer head in ocfs2_do_truncate.

In ocfs2_do_truncate, we forget to release last_eb_bh which
will cause memleak. So call brelse in the end.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Handle quota file corruption more gracefully
Jan Kara [Mon, 3 Aug 2009 16:24:21 +0000 (18:24 +0200)]
ocfs2: Handle quota file corruption more gracefully

ocfs2_read_virt_blocks() does BUG when we try to read a block from a file
beyond its end. Since this can happen due to filesystem corruption, it
is not really an appropriate answer. Make ocfs2_read_quota_block() check
the condition and handle it by calling ocfs2_error() and returning EIO.

[ Modified to print ip_blkno in the error - Joel ]

Reported-by: Tristan Ye <tristan.ye@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Fix possible deadlock when extending quota file
Jan Kara [Thu, 6 Aug 2009 21:29:34 +0000 (23:29 +0200)]
ocfs2: Fix possible deadlock when extending quota file

In OCFS2, allocator locks rank above transaction start. Thus we
cannot extend quota file from inside a transaction less we could
deadlock.

We solve the problem by starting transaction not already in
ocfs2_acquire_dquot() but only in ocfs2_local_read_dquot() and
ocfs2_global_read_dquot() and we allocate blocks to quota files before starting
the transaction.  In case we crash, quota files will just have a few blocks
more but that's no problem since we just use them next time we extend the
quota file.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: keep index within status_map[]
Roel Kluin [Thu, 6 Aug 2009 23:07:50 +0000 (16:07 -0700)]
ocfs2: keep index within status_map[]

Do not exceed array status_map[]

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Initialize the cluster we're writing to in a non-sparse extend
Sunil Mushran [Thu, 6 Aug 2009 23:12:58 +0000 (16:12 -0700)]
ocfs2: Initialize the cluster we're writing to in a non-sparse extend

In a non-sparse extend, we correctly allocate (and zero) the clusters between
the old_i_size and pos, but we don't zero the portions of the cluster we're
writing to outside of pos<->len.

It handles clustersize > pagesize and blocksize < pagesize.

[Cleaned up by Joel Becker.]

Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Remove redundant BUG_ON in __dlm_queue_ast()
Goldwyn Rodrigues [Fri, 31 Jul 2009 19:28:02 +0000 (14:28 -0500)]
ocfs2: Remove redundant BUG_ON in __dlm_queue_ast()

We BUG_ON() the same thing twice.

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.de>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2/quota: Release lock for error in ocfs2_quota_write.
Tao Ma [Thu, 30 Jul 2009 08:07:10 +0000 (16:07 +0800)]
ocfs2/quota: Release lock for error in ocfs2_quota_write.

ocfs2_quota_write needs to release the lock if it fails to
read quota block. So use "goto out" instead of "return err".

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Define credit counts for quota operations
Jan Kara [Wed, 22 Jul 2009 11:17:21 +0000 (13:17 +0200)]
ocfs2: Define credit counts for quota operations

Numbers of needed credits for some quota operations were written
as raw numbers. Create appropriate defines instead.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Remove syncjiff field from quota info
Jan Kara [Wed, 22 Jul 2009 11:17:20 +0000 (13:17 +0200)]
ocfs2: Remove syncjiff field from quota info

syncjiff is just a converted value of syncms. Some places which
are updating syncms forgot to update syncjiff as well. Since the
conversion is just a simple division / multiplication and it does
not happen frequently, just remove the syncjiff field to avoid
forgotten conversions.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Fix initialization of blockcheck stats
Jan Kara [Wed, 22 Jul 2009 11:17:19 +0000 (13:17 +0200)]
ocfs2: Fix initialization of blockcheck stats

We just set blockcheck stats to zeros but we should also
properly initialize the spinlock there.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Zero out padding of on disk dquot structure
Jan Kara [Wed, 22 Jul 2009 11:17:18 +0000 (13:17 +0200)]
ocfs2: Zero out padding of on disk dquot structure

Padding fields of on-disk dquot structure were not zeroed. Zero them
so that it's easier to use them later.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Initialize blocks allocated to local quota file
Jan Kara [Wed, 22 Jul 2009 11:17:17 +0000 (13:17 +0200)]
ocfs2: Initialize blocks allocated to local quota file

When we extend local quota file, we should initialize data
in newly allocated block. Firstly because on recovery we could
parse bogus data, secondly so that block checksums are properly
computed.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Mark buffer uptodate before calling ocfs2_journal_access_dq()
Jan Kara [Wed, 22 Jul 2009 11:17:16 +0000 (13:17 +0200)]
ocfs2: Mark buffer uptodate before calling ocfs2_journal_access_dq()

In a code path extending local quota files we marked new header
buffer uptodate only after calling ocfs2_journal_access_dq() which
triggers a bug. Fix it and also call ocfs2 variant of the function
marking buffer uptodate.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Make global quota files blocksize aligned
Jan Kara [Wed, 22 Jul 2009 11:17:15 +0000 (13:17 +0200)]
ocfs2: Make global quota files blocksize aligned

Change i_size of global quota files so that it always remains aligned to block
size. This is mainly because the end of quota block may contain checksum (if
checksumming is enabled) and it's a bit awkward for it to be "outside" of quota
file (and it makes life harder for ocfs2-tools).

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Use ocfs2_rec_clusters in ocfs2_adjust_adjacent_records.
Tao Ma [Thu, 23 Jul 2009 00:12:58 +0000 (08:12 +0800)]
ocfs2: Use ocfs2_rec_clusters in ocfs2_adjust_adjacent_records.

In ocfs2_adjust_adjacent_records, we will adjust adjacent records
according to the extent_list in the lower level. But actually
the lower level tree will either be a leaf or a branch. If we only
use ocfs2_is_empty_extent we will meet with some problem if the lower
tree is a branch (tree_depth > 1). So use !ocfs2_rec_clusters instead.
And actually only the leaf record can have holes. So add a BUG_ON
for non-leaf branch.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Fix deadlock on umount
Jan Kara [Mon, 20 Jul 2009 10:12:36 +0000 (12:12 +0200)]
ocfs2: Fix deadlock on umount

In commit ea455f8ab68338ba69f5d3362b342c115bea8e13, we moved the dentry lock
put process into ocfs2_wq. This causes problems during umount because ocfs2_wq
can drop references to inodes while they are being invalidated by
invalidate_inodes() causing all sorts of nasty things (invalidate_inodes()
ending in an infinite loop, "Busy inodes after umount" messages etc.).

We fix the problem by stopping ocfs2_wq from doing any further releasing of
inode references on the superblock being unmounted, wait until it finishes
the current round of releasing and finally cleaning up all the references in
dentry_lock_list from ocfs2_put_super().

The issue was tracked down by Tao Ma <tao.ma@oracle.com>.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Add extra credits and access the modified bh in update_edge_lengths.
Tao Ma [Tue, 21 Jul 2009 07:42:05 +0000 (15:42 +0800)]
ocfs2: Add extra credits and access the modified bh in update_edge_lengths.

In normal tree rotation left process, we will never touch the tree
branch above subtree_index and ocfs2_extend_rotate_transaction doesn't
reserve the credits for them either.

But when we want to delete the rightmost extent block, we have to update
the rightmost records for all the rightmost branch(See
ocfs2_update_edge_lengths), so we have to allocate extra credits for them.
What's more, we have to access them also.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Fail ocfs2_get_block() immediately when a block needs allocation
Wengang Wang [Mon, 13 Jul 2009 03:38:58 +0000 (11:38 +0800)]
ocfs2: Fail ocfs2_get_block() immediately when a block needs allocation

ocfs2_get_block() does no allocation.  Hole filling for writes should
have happened farther up in the call chain.  We detect this case and
print an error, but we then continue with the function.  We should be
exiting immediately.

Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Fix error return in ocfs2_write_cluster()
Wengang Wang [Mon, 13 Jul 2009 03:38:23 +0000 (11:38 +0800)]
ocfs2: Fix error return in ocfs2_write_cluster()

A typo caused ocfs2_write_cluster() to return 0 in some error cases.
Fix it.

Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Fix compilation warning for fs/ocfs2/xattr.c
Subrata Modak [Mon, 13 Jul 2009 19:49:31 +0000 (01:19 +0530)]
ocfs2: Fix compilation warning for fs/ocfs2/xattr.c

gcc 4.4.1 generates the following build warning on i386:

CC [M]  fs/ocfs2/xattr.o
fs/ocfs2/xattr.c: In function ‘ocfs2_xattr_block_get’:
fs/ocfs2/xattr.c:1055: warning: ‘block_off’ may be used uninitialized in this function

The following fix is based on a similar approach by David Howells
few days back: http://lkml.org/lkml/2009/7/9/109,

Signed-off-by: Subrata Modak<subrata@linux.vnet.ibm.com>,
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Initialize count in aio_write before generic_write_checks
Goldwyn Rodrigues [Sat, 11 Jul 2009 15:57:27 +0000 (10:57 -0500)]
ocfs2: Initialize count in aio_write before generic_write_checks

generic_write_checks() expects count to be initialized to the size of
the write.  Writes to files open with O_DIRECT|O_LARGEFILE write 0 bytes
because count is uninitialized.

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.de>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: log the actual return value of ocfs2_file_aio_write()
Wengang Wang [Fri, 10 Jul 2009 05:26:04 +0000 (13:26 +0800)]
ocfs2: log the actual return value of ocfs2_file_aio_write()

in ocfs2_file_aio_write(), log_exit() could don't log the value
which is really returned. this patch fixes it.

Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: trivial fix for s/migrate/migration/ in dlmrecovery.c logging
Jeff Liu [Tue, 7 Jul 2009 07:51:40 +0000 (15:51 +0800)]
ocfs2: trivial fix for s/migrate/migration/ in dlmrecovery.c logging

in dlmrecovery.c:1121, replace 'migrate' to 'migration' to keep the consistency
by comparing to other lines with the similar log info in the same file.

Signed-off-by: Jeff Liu <jeff.liu@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agoocfs2: Fixup orphan scan cleanup after failed mount
Jeff Mahoney [Tue, 7 Jul 2009 21:22:12 +0000 (17:22 -0400)]
ocfs2: Fixup orphan scan cleanup after failed mount

If the mount fails for any reason, ocfs2_dismount_volume calls
ocfs2_orphan_scan_stop. It requires that ocfs2_orphan_scan_init
be called to setup the mutex and work queues, but that doesn't
happen if the mount has failed and we oops accessing an uninitialized
work queue.

This patch splits the init and startup of the orphan scan, eliminating
the oops.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
15 years agox86: don't clear nodes_states[N_NORMAL_MEMORY] when numa is not compiled in
Yinghai Lu [Wed, 8 Jul 2009 16:50:19 +0000 (09:50 -0700)]
x86: don't clear nodes_states[N_NORMAL_MEMORY] when numa is not compiled in

Alex found that specjbb2005 still can not run with hugepages on an
x86-64 machine.  This only happens when numa is not compiled in.

The root cause: node_set_state will not set it back for us in that case,
so don't clear that when numa is not select in config

[ v2: use node_clear_state instead ]
Reported-and-Tested-by: Alex Shi <alex.shi@intel.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Reviewed-by: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agoRemove multiple KERN_ prefixes from printk formats
Joe Perches [Mon, 6 Jul 2009 20:05:40 +0000 (13:05 -0700)]
Remove multiple KERN_ prefixes from printk formats

Commit 5fd29d6ccbc98884569d6f3105aeca70858b3e0f ("printk: clean up
handling of log-levels and newlines") changed printk semantics.  printk
lines with multiple KERN_<level> prefixes are no longer emitted as
before the patch.

<level> is now included in the output on each additional use.

Remove all uses of multiple KERN_<level>s in formats.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agotty: maintainers data was edited wrongly by someone
Alan Cox [Tue, 7 Jul 2009 15:39:54 +0000 (16:39 +0100)]
tty: maintainers data was edited wrongly by someone

Move tty entries to tty not trivial. Noted by David Brownell.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agopty: Rework the pty layer to use the normal buffering logic
Alan Cox [Tue, 7 Jul 2009 15:39:41 +0000 (16:39 +0100)]
pty: Rework the pty layer to use the normal buffering logic

This fixes the ppp problems and various other issues with call locking
caused by one side of a pty called in one locking context trying to match
another with differing rules on the other side. We also get a big slack
space to work with that means we can bury the flow control deadlock case
for any conceivable real world situation.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agoMerge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq
Linus Torvalds [Wed, 8 Jul 2009 16:36:46 +0000 (09:36 -0700)]
Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq:
  [CPUFREQ] Powernow-k8: support family 0xf with 2 low p-states
  [CPUFREQ] fix (utter) cpufreq_add_dev mess
  [CPUFREQ] Cleanup locking in conservative governor
  [CPUFREQ] Cleanup locking in ondemand governor
  [CPUFREQ] Mark policy_rwsem as going static in cpufreq.c wont be exported
  [CPUFREQ] Eliminate the recent lockdep warnings in cpufreq

15 years agoMerge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux...
Linus Torvalds [Wed, 8 Jul 2009 16:35:50 +0000 (09:35 -0700)]
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-quota-2.6

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-quota-2.6:
  quota: Fix possible deadlock during parallel quotaon and quotaoff

15 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Wed, 8 Jul 2009 16:35:22 +0000 (09:35 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6:
  PM: Clear -EAGAIN in dpm_prepare
  x86: Fix resume from suspend when CONFIG_CC_STACKPROTECTOR