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  1. 27 4月, 2007 11 次提交
    • M
      ocfs2: Remember rw lock level during direct io · 7cdfc3a1
      由 Mark Fasheh 提交于 
      Cluster locking might have been redone because a direct write won't
complete, so this needs to be reflected in the iocb.
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>
      7cdfc3a1
    • M
      ocfs2: Fix up i_blocks calculation to know about holes · 8110b073
      由 Mark Fasheh 提交于 
      Older file systems which didn't support holes did a dumb calculation of
i_blocks based on i_size. This is no longer accurate, so fix things up to
take actual allocation into account.
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>
      8110b073
    • M
      ocfs2: Read from an unwritten extent returns zeros · 49cb8d2d
      由 Mark Fasheh 提交于 
      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: NMark Fasheh <mark.fasheh@oracle.com>
      49cb8d2d
    • M
      ocfs2: make room for unwritten extents flag · e48edee2
      由 Mark Fasheh 提交于 
      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: NMark Fasheh <mark.fasheh@oracle.com>
      e48edee2
    • M
      ocfs2: Use own splice write actor · 6af67d82
      由 Mark Fasheh 提交于 
      We need to fill holes during a splice write. Provide our own splice write
actor which can call ocfs2_file_buffered_write() with a splice-specific
callback.
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>
      6af67d82
    • M
      ocfs2: zero tail of sparse files on truncate · 60b11392
      由 Mark Fasheh 提交于 
      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: NMark Fasheh <mark.fasheh@oracle.com>
      60b11392
    • M
      ocfs2: teach ocfs2_file_aio_write() about sparse files · 9517bac6
      由 Mark Fasheh 提交于 
      Unfortunately, ocfs2 can no longer make use of generic_file_aio_write_nlock()
because allocating writes will require zeroing of pages adjacent to the I/O
for cluster sizes greater than page size.

Implement a custom file write here, which can order page locks for zeroing.
This also has the advantage that cluster locks can easily be ordered outside
of the page locks.
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>
      9517bac6
    • M
      ocfs2: abstract out allocation locking · abf8b156
      由 Mark Fasheh 提交于 
      Right now, file allocation for ocfs2 is done within ocfs2_extend_file(),
which is either called from ->setattr() (for an i_size change), or at the
top of ocfs2_file_aio_write().

Inodes on file systems with sparse file support will want to do their
allocation during the actual write call.

In either case the cluster locking decisions are the same. We abstract out
that code into a new function, ocfs2_lock_allocators() which will be used by
a later patch to enable writing to sparse files.

This also provides a nice cleanup of ocfs2_extend_allocation().
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>
      abf8b156
    • M
      ocfs2: teach extend/truncate about sparse files · 3a0782d0
      由 Mark Fasheh 提交于 
      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: NMark Fasheh <mark.fasheh@oracle.com>
      3a0782d0
    • M
      ocfs2: sparse b-tree support · dcd0538f
      由 Mark Fasheh 提交于 
      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: NMark Fasheh <mark.fasheh@oracle.com>
      dcd0538f
    • M
      ocfs2: filter more error prints · a9f5f707
      由 Mark Fasheh 提交于 
      We don't want to print anything at all in ocfs2_lookup() when getting an
error from ocfs2_iget() - it could be something as innocuous as a signal
being detected in the dlm.

ocfs2_permission() should filter on -ENOENT which ocfs2_meta_lock() can
return if the inode was deleted on another node.
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>
      a9f5f707
  3. 13 2月, 2007 1 次提交
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