linux-toradex.git/fs/xfs/xfs_btree.h, branch v3.0.74

xfs: remove the ->kill_root btree operation

2010-10-18T20:07:38+00:00

The implementation os ->kill_root only differ by either simply
zeroing out the now unused buffer in the btree cursor in the inode
allocation btree or using xfs_btree_setbuf in the allocation btree.

Initially both of them used xfs_btree_setbuf, but the use in the
ialloc btree was removed early on because it interacted badly with
xfs_trans_binval.

In addition to zeroing out the buffer in the cursor xfs_btree_setbuf
updates the bc_ra array in the btree cursor, and calls
xfs_trans_brelse on the buffer previous occupying the slot.

The bc_ra update should be done for the alloc btree updated too,
although the lack of it does not cause serious problems.  The
xfs_trans_brelse call on the other hand is effectively a no-op in
the end - it keeps decrementing the bli_recur refcount until it hits
zero, and then just skips out because the buffer will always be
dirty at this point.  So removing it for the allocation btree is
just fine.

So unify the code and move it to xfs_btree.c.  While we're at it
also replace the call to xfs_btree_setbuf with a NULL bp argument in
xfs_btree_del_cursor with a direct call to xfs_trans_brelse given
that the cursor is beeing freed just after this and the state
updates are superflous.  After this xfs_btree_setbuf is only used
with a non-NULL bp argument and can thus be simplified.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Alex Elder

xfs: add more statics & drop some unused functions

2009-08-31T19:46:20+00:00

A lot more functions could be made static, but they need
forward declarations; this does some easy ones, and also
found a few unused functions in the process.

Signed-off-by: Eric Sandeen 
Reviewed-by: Christoph Hellwig 
Signed-off-by: Felix Blyakher

xfs: fix various typos

2009-03-29T07:55:42+00:00

Signed-off-by: Malcolm Parsons 
Reviewed-by: Christoph Hellwig

[XFS] Always use struct xfs_btree_block instead of short / longform

2008-10-30T06:14:34+00:00

structures.

Always use the generic xfs_btree_block type instead of the short / long
structures. Add XFS_BTREE_SBLOCK_LEN / XFS_BTREE_LBLOCK_LEN defines for
the length of a short / long form block. The rationale for this is that we
will grow more btree block header variants to support CRCs and other RAS
information, and always accessing them through the same datatype with
unions for the short / long form pointers makes implementing this much
easier.

SGI-PV: 988146

SGI-Modid: xfs-linux-melb:xfs-kern:32300a

Signed-off-by: Christoph Hellwig 
Signed-off-by: Donald Douwsma 
Signed-off-by: David Chinner 
Signed-off-by: Lachlan McIlroy

[XFS] cleanup btree record / key / ptr addressing macros.

2008-10-30T06:11:40+00:00

Replace the generic record / key / ptr addressing macros that use cpp
token pasting with simpler macros that do the job for just one given btree
type. The new macros lose the cur argument and thus can be used outside
the core btree code, but also gain an xfs_mount * argument to allow for
checking the CRC flag in the near future. Note that many of these macros
aren't actually used in the kernel code, but only in userspace (mostly in
xfs_repair).

SGI-PV: 988146

SGI-Modid: xfs-linux-melb:xfs-kern:32295a

Signed-off-by: Christoph Hellwig 
Signed-off-by: Donald Douwsma 
Signed-off-by: David Chinner 
Signed-off-by: Lachlan McIlroy

[XFS] Cleanup maxrecs calculation.

2008-10-30T06:11:19+00:00

Clean up the way the maximum and minimum records for the btree blocks are
calculated. For the alloc and inobt btrees all the values are
pre-calculated in xfs_mount_common, and we switch the current loop around
the ugly generic macros that use cpp token pasting to generate type names
to two small helpers in normal C code. For the bmbt and bmdr trees these
helpers also exist, but can be called during runtime, too. Here we also
kill various macros dealing with them and inline the logic into the
get_minrecs / get_maxrecs / get_dmaxrecs methods in xfs_bmap_btree.c.

Note that all these new helpers take an xfs_mount * argument which will be
needed to determine the size of a btree block once we add support for
extended btree blocks with CRCs and other RAS information.

SGI-PV: 988146

SGI-Modid: xfs-linux-melb:xfs-kern:32292a

Signed-off-by: Christoph Hellwig 
Signed-off-by: Donald Douwsma 
Signed-off-by: Lachlan McIlroy

[XFS] Sync up kernel and user-space headers

2008-10-30T06:05:38+00:00

SGI-PV: 986558

SGI-Modid: xfs-linux-melb:xfs-kern:32231a

Signed-off-by: Barry Naujok 
Signed-off-by: Christoph Hellwig 
Signed-off-by: Lachlan McIlroy

[XFS] mark various functions in xfs_btree.c static

2008-10-30T05:58:41+00:00

Lots of functionality in xfs_btree.c isn't needed by callers outside of
this file anymore, so mark these functions static.

SGI-PV: 985583

SGI-Modid: xfs-linux-melb:xfs-kern:32209a

Signed-off-by: Christoph Hellwig 
Signed-off-by: Lachlan McIlroy 
Signed-off-by: Bill O'Donnell 
Signed-off-by: David Chinner

[XFS] add keys_inorder and recs_inorder btree methods

2008-10-30T05:58:32+00:00

Add methods to check whether two keys/records are in the righ order. This
replaces the xfs_btree_check_key and xfs_btree_check_rec methods. For the
callers from xfs_bmap.c just opencode the bmbt-specific asserts.

SGI-PV: 985583

SGI-Modid: xfs-linux-melb:xfs-kern:32208a

Signed-off-by: Christoph Hellwig 
Signed-off-by: Lachlan McIlroy 
Signed-off-by: Bill O'Donnell 
Signed-off-by: David Chinner

[XFS] kill xfs_bmbt_log_block and xfs_bmbt_log_recs

2008-10-30T05:58:21+00:00

These are equivalent to the xfs_btree_* versions, and the only remaining
caller can be switched to the generic one after they are exported. Also
remove some now dead infrastructure in xfs_bmap_btree.c.

SGI-PV: 985583

SGI-Modid: xfs-linux-melb:xfs-kern:32207a

Signed-off-by: Christoph Hellwig 
Signed-off-by: Lachlan McIlroy 
Signed-off-by: Bill O'Donnell 
Signed-off-by: David Chinner