Commit graph

123 commits

Author SHA1 Message Date
Tao Ma
0fe9b66c65 ocfs2: Add preserve to reflink.
reflink has 2 options for the destination file:
1. snapshot: reflink will attempt to preserve ownership, permissions,
   and all other security state in order to create a full snapshot.
2. new file: it will acquire the data extent sharing but will see the
   file's security state and attributes initialized as a new file.

So add the option to ocfs2.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:49 -07:00
Tao Ma
ce9c5a54c0 ocfs2: Modify removing xattr process for refcount.
The old xattr value remove is quite simple, it just erase the
tree and free the clusters. But as we have added refcount support,
The process is a little complicated.

We have to lock the refcount tree at the beginning, what's more,
we may split the refcount tree in some cases, so meta/credits are
needed.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:45 -07:00
Tao Ma
2999d12f4d ocfs2: Add reflink support for xattr.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:45 -07:00
Tao Ma
a7fe7a3a1a ocfs2: Create an xattr indexed block if needed.
With reflink, there is a need that we create a new xattr indexed
block from the very beginning. So add a new parameter for
ocfs2_create_xattr_block.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:44 -07:00
Tao Ma
8b2c0dba51 ocfs2: Call refcount tree remove process properly.
Now with xattr refcount support, we need to check whether
we have xattr refcounted before we remove the refcount tree.

Now the mechanism is:
1) Check whether i_clusters == 0, if no, exit.
2) check whether we have i_xattr_loc in dinode. if yes, exit.
2) Check whether we have inline xattr stored outside, if yes, exit.
4) Remove the tree.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:44 -07:00
Tao Ma
0129241e2b ocfs2: Attach xattr clusters to refcount tree.
In ocfs2, when xattr's value is larger than OCFS2_XATTR_INLINE_SIZE,
it will be kept outside of the blocks we store xattr entry. And they
are stored in a b-tree also. So this patch try to attach all these
clusters to refcount tree also.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:43 -07:00
Tao Ma
47bca4950b ocfs2: Abstract ocfs2 xattr tree extend rec iteration process.
Currently we have ocfs2_iterate_xattr_buckets which can receive
a para and a callback to iterate a series of bucket. It is good.
But actually the 2 callers ocfs2_xattr_tree_list_index_block and
ocfs2_delete_xattr_index_block are almost the same. The only
difference is that the latter need to handle the extent record
also. So add a new function named ocfs2_iterate_xattr_index_block.
It can be given func callback which are used for exten record.
So now we only have one iteration function for the xattr index
block. Ane what's more, it is useful for our future reflink
operations.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:43 -07:00
Tao Ma
5aea1f0ef4 ocfs2: Abstract the creation of xattr block.
In xattr reflink, we also need to create xattr block, so
abstract the process out.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:42 -07:00
Tao Ma
fd68a894fc ocfs2: Remove inode from ocfs2_xattr_bucket_get_name_value.
In ocfs2_xattr_bucket_get_name_value, actually we only use
super_block. So use it.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:41 -07:00
Tao Ma
492a8a33e1 ocfs2: Add CoW support for xattr.
In order to make 2 transcation(xattr and cow) independent with each other,
we CoW the whole xattr out in case we are setting them.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
2009-09-22 20:09:41 -07:00
Tao Ma
1061f9c1c9 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>
2009-09-22 20:09:39 -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
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
facdb77f54 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>
2009-09-04 16:07:53 -07:00
Joel Becker
0cf2f7632b 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>
2009-09-04 16:07:50 -07:00
Joel Becker
8cb471e8f8 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>
2009-09-04 16:07:48 -07:00
Subrata Modak
44d8e4e1e9 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>
2009-07-20 15:52:57 -07:00
Tao Ma
a46fa684fc ocfs2: Don't printk the error when listing too many xattrs.
Currently the kernel defines XATTR_LIST_MAX as 65536
in include/linux/limits.h.  This is the largest buffer that is used for
listing xattrs.

But with ocfs2 xattr tree, we actually have no limit for the number.  If
filesystem has more names than can fit in the buffer, the kernel
logs will be pollluted with something like this when listing:

(27738,0):ocfs2_iterate_xattr_buckets:3158 ERROR: status = -34
(27738,0):ocfs2_xattr_tree_list_index_block:3264 ERROR: status = -34

So don't print "ERROR" message as this is not an ocfs2 error.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-05-05 14:43:24 -07:00
Mark Fasheh
9b7895efac ocfs2: Add a name indexed b-tree to directory inodes
This patch makes use of Ocfs2's flexible btree code to add an additional
tree to directory inodes. The new tree stores an array of small,
fixed-length records in each leaf block. Each record stores a hash value,
and pointer to a block in the traditional (unindexed) directory tree where a
dirent with the given name hash resides. Lookup exclusively uses this tree
to find dirents, thus providing us with constant time name lookups.

Some of the hashing code was copied from ext3. Unfortunately, it has lots of
unfixed checkpatch errors. I left that as-is so that tracking changes would
be easier.

Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Acked-by: Joel Becker <joel.becker@oracle.com>
2009-04-03 11:39:15 -07:00
Tao Ma
712e53e46a ocfs2: Use xs->bucket to set xattr value outside
A long time ago, xs->base is allocated a 4K size and all the contents
in the bucket are copied to the it. Now we use ocfs2_xattr_bucket to
abstract xattr bucket and xs->base is initialized to the start of the
bu_bhs[0]. So xs->base + offset will overflow when the value root is
stored outside the first block.

Then why we can survive the xattr test by now? It is because we always
read the bucket contiguously now and kernel mm allocate continguous
memory for us. We are lucky, but we should fix it. So just get the
right value root as other callers do.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Acked-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-03-12 16:46:09 -07:00
Tiger Yang
6c9fd1dc0a ocfs2: reserve xattr block for new directory with inline data
If this is a new directory with inline data, we choose to
reserve the entire inline area for directory contents and
force an external xattr block.

Signed-off-by: Tiger Yang <tiger.yang@oracle.com>
Acked-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-03-12 16:45:40 -07:00
Tiger Yang
4442f51826 ocfs2: set gap to seperate entry and value when xattr in bucket
This patch set a gap (4 bytes) between xattr entry and
name/value when xattr in bucket. This gap use to seperate
entry and name/value when a bucket is full. It had already
been set when xattr in inode/block.

Signed-off-by: Tiger Yang <tiger.yang@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-02-26 11:51:11 -08:00
Tao Ma
c8b9cf9a7c ocfs2: lock the metaecc process for xattr bucket
For other metadata in ocfs2, metaecc is checked in ocfs2_read_blocks
with io_mutex held. While for xattr bucket, it is calculated by
the whole buckets. So we have to add a spin_lock to prevent multiple
processes calculating metaecc.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Tested-by: Tristan Ye <tristan.ye@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-02-26 11:51:11 -08:00
Tao Ma
89a907afe0 ocfs2: Use the right access_* method in ctime update of xattr.
In ctime updating of xattr, it use the wrong type of access for
inode, so use ocfs2_journal_access_di instead.

Reported-and-Tested-by: Tristan Ye <tristan.ye@oracle.com>
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Acked-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-02-26 11:51:11 -08:00
Tao Ma
554e7f9e04 ocfs2: Access the xattr bucket only before modifying it.
In ocfs2_xattr_value_truncate, we may call b-tree codes which will
extend the journal transaction. It has a potential problem that it
may let the already-accessed-but-not-dirtied buffers gone. So we'd
better access the bucket after we call ocfs2_xattr_value_truncate.
And as for the root buffer for the xattr value, b-tree code will
acess and dirty it, so we don't need to worry about it.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-02-02 14:20:18 -08:00
Tiger Yang
38d59ef61c ocfs2: Add xattr support checking in init_security
We must check whether ocfs2 volume support xattr in init_security,
if not support xattr and security is enable, would cause failure of mknod.

Signed-off-by: Tiger Yang <tiger.yang@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:36 -08:00
Tiger Yang
008aafaf0b ocfs2: alloc xattr bucket in ocfs2_xattr_set_handle
In extreme situation, may need xattr bucket for setting
security entry and acl entries during mknod. This only
happens when block size is too small.

Signed-off-by: Tiger Yang <tiger.yang@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:36 -08:00
Tiger Yang
0e445b6fe9 ocfs2: calculate and reserve credits for xattr value in mknod
We extend the credits for xattr's large value in set_value_outside
before, this can give rise to a credits issue when we set one security
entry and two acl entries duing mknod. As we remove extend_trans form
set_value_outside, we must calculate and reserve the credits for
xattr's large value in mknod.

Signed-off-by: Tiger Yang <tiger.yang@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:36 -08:00
Tao Ma
90cb546cad ocfs2/xattr: fix credits calculation during index create
When creating a xattr index block, the old calculation forget
to add credits for the meta change of the alloc file. So add
more credits and more comments to explain it.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:36 -08:00
Tao Ma
4b3f6209bf ocfs2/xattr: Always updating ctime during xattr set.
In xattr set, we should always update ctime if the operation goes
sucessfully. The old one mistakenly put it in ocfs2_xattr_set_entry
which is only called when we set xattr in inode or xattr block. The
side benefit is that it resolve the bug 1052 since in that scenario,
ocfs2_calc_xattr_set_need only calc out the xattr set credits while
ocfs2_xattr_set_entry update the inode also which isn't concerned with
the process of xattr set.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:36 -08:00
Tao Ma
71d548a6af ocfs2/xattr: Remove extend_trans call and add its credits from the beginning
Actually, when setting a new xattr value, we know it from the very
beginning, and it isn't like the extension of bucket in which case
we can't figure it out. So remove ocfs2_extend_trans in that function
and calculate it before the transaction. It also relieve acl operation
from the worry about the side effect of ocfs2_extend_trans.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:36 -08:00
Joel Becker
8400897249 ocfs2: Use proper journal_access function in xattr.c
Change the rest of the naked ocfs2_journal_access() calls in
fs/ocfs2/xattr.c to use the appropriate ocfs2_journal_access_*() call
for their metadata type.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:34 -08:00
Joel Becker
4311901daa ocfs2: Pass value buf to ocfs2_remove_value_outside().
ocfs2_remove_value_outside() needs to know the type of buffer it is
looking at.  Pass in an ocfs2_xattr_value_buf.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:33 -08:00
Joel Becker
512620f44d ocfs2: Use ocfs2_xattr_value_buf in ocfs2_xattr_set_entry().
ocfs2_xattr_set_entry is the function that knows what type of block it
is setting into.  This is what we wanted from ocfs2_xattr_value_buf.
Plus, moving the value buf up into ocfs2_xattr_set_entry() allows us to
pass it into ocfs2_xattr_set_value_outside() and ocfs2_xattr_cleanup().

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:33 -08:00
Joel Becker
0c748e9532 ocfs2: Pass value buf to ocfs2_xattr_update_entry().
ocfs2_xattr_update_entry() updates the entry portion of an xattr buffer.
This can be part of multiple metadata block types, so pass the buffer in
via an ocfs2_xattr_value_buf.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:33 -08:00
Joel Becker
b3e5d37905 ocfs2: Pass ocfs2_xattr_value_buf into ocfs2_xattr_value_truncate().
The callers of ocfs2_xattr_value_truncate() now pass in
ocfs2_xattr_value_bufs.  These callers are the ones that calculated the
xv location, so they are the right starting point.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:32 -08:00
Joel Becker
19b801f45f ocfs2: Pull ocfs2_xattr_value_buf up into ocfs2_xattr_value_truncate().
Place an ocfs2_xattr_value_buf in ocfs2_xattr_value_truncate() and pass
it down to ocfs2_xattr_shrink_size().  We can also pass it into
ocfs2_xattr_extend_allocation(), replacing its ocfs2_xattr_value_buf.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:32 -08:00
Joel Becker
d72cc72d57 ocfs2: Pull ocfs2_xattr_value_buf up from __ocfs2_remove_xattr_range().
Place an ocfs2_xattr_value_buf in __ocfs2_xattr_shrink_size() and pass
it down to __ocfs2_remove_xattr_range().

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:32 -08:00
Joel Becker
2a50a743bd ocfs2: Create ocfs2_xattr_value_buf.
When an ocfs2 extended attribute is large enough to require its own
allocation tree, we root it with an ocfs2_xattr_value_root.  However,
these roots can be a part of inodes, xattr blocks, or xattr buckets.
Thus, they need a different journal access function for each container.

We wrap the bh, its journal access function, and the value root (xv) in
a structure called ocfs2_xattr_valu_buf.  This is a package that can
be passed around.  In this first pass, we simply pass it to the
extent tree code.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:32 -08:00
Joel Becker
4d0e214ee8 ocfs2: Add ecc and checksums to ocfs2 xattr buckets.
The xattr bucket can span multiple blocks on disk.  We have wrappers
for this structure in the code.  We use the new multi-block ecc calls to
calculate and validate the bucket.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:32 -08:00
Joel Becker
d6b32bbb3e ocfs2: block read meta ecc.
Add block check calls to the read_block validate functions.  This is the
almost all of the read-side checking of metaecc.  xattr buckets are not checked
yet.   Writes are also unchecked, and so a read-write mount will quickly fail.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:31 -08:00
Joel Becker
91f2033fa9 ocfs2: Pass xs->bucket into ocfs2_add_new_xattr_bucket().
Pass the actual target bucket for insert through to
ocfs2_add_new_xattr_bucket().  Now growing a bucket has no buffer_head
knowledge.

ocfs2_add_new_xattr_bucket() leavs xs->bucket in the proper state for
insert.  However, it doesn't update the rest of the search fields in xs,
so we still have to relse() and re-find.  That's OK, because everything
is cached.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:30 -08:00
Joel Becker
ed29c0ca14 ocfs2: Move buckets up into ocfs2_add_new_xattr_bucket().
Lift the buckets from ocfs2_add_new_xattr_cluster() up into
ocfs2_add_new_xattr_bucket().  Now ocfs2_add_new_xattr_cluster()
doesn't deal with buffer_heads.  In fact, we no longer have to play
get_bh() tricks at all.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:30 -08:00
Joel Becker
012ee91087 ocfs2: Move buckets up into ocfs2_add_new_xattr_cluster().
Lift the buckets from ocfs2_adjust_xattr_cross_cluster() up into
ocfs2_add_new_xattr_cluster().  Now ocfs2_adjust_xattr_cross_cluster()
doesn't deal with buffer_heads.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:30 -08:00
Joel Becker
41cb814866 ocfs2: Pass buckets into ocfs2_mv_xattr_bucket_cross_cluster().
Now that ocfs2_adjust_xattr_cross_cluster() has buckets, it can pass
them into ocfs2_mv_xattr_bucket_cross_cluster().  It no longer has to
care about buffer_heads.  The manipulation of first_bh and header_bh
moves up to ocfs2_adjust_xattr_cross_cluster().

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:30 -08:00
Joel Becker
92cf3adf48 ocfs2: Start using buckets in ocfs2_adjust_xattr_cross_cluster().
We want to be passing around buckets instead of buffer_heads.  Let's get
them into ocfs2_adjust_xattr_cross_cluster.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:30 -08:00
Joel Becker
c58b6032f9 ocfs2: Use ocfs2_mv_xattr_buckets() in ocfs2_mv_xattr_bucket_cross_cluster().
Now that ocfs2_mv_xattr_buckets() can move a partial cluster's worth of
buckets, ocfs2_mv_xattr_bucket_cross_cluster() can use it.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:29 -08:00
Joel Becker
54ecb6b6df ocfs2: ocfs2_mv_xattr_buckets() can handle a partial cluster now.
If you look at ocfs2_mv_xattr_bucket_cross_cluster(), you'll notice that
two-thirds of the code is almost identical to ocfs2_mv_xattr_buckets().
The only difference is that ocfs2_mv_xattr_buckets() moves a whole
cluster's worth, while ocfs2_mv_xattr_bucket_cross_cluster() moves half
the cluster.

We change ocfs2_mv_xattr_buckets() to allow moving partial clusters.
The original caller of ocfs2_mv_xattr_buckets() still moves the whole
cluster's worth - it just passes a start_bucket of 0.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2009-01-05 08:40:29 -08:00