GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-30 19:06:14 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

[XFS] small cleanups in xfs_btree.c

Browse source 
Remove unneeded xfs_btree_get_block forward declaration. Move
xfs_btree_firstrec next to xfs_btree_lastrec.

SGI-PV: 981498

SGI-Modid: xfs-linux-melb:xfs-kern:31787a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Tim Shimmin <tes@sgi.com>
Signed-off-by: David Chinner <david@fromorbit.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
This commit is contained in:
Christoph Hellwig 2008-08-13 16:23:50 +10:00 • committed by Lachlan McIlroy
parent 41be8bed1f
commit cdcf43335c
1 changed files with 30 additions and 57 deletions
Download patch file Download diff file Expand all files Collapse all files

87
fs/xfs/xfs_btree.c
View file

@ -46,37 +46,10 @@ kmem_zone_t *xfs_btree_cur_zone;
/* /*
* Btree magic numbers. * Btree magic numbers.
*/ */
const __uint32_t xfs_magics[XFS_BTNUM_MAX] = const __uint32_t xfs_magics[XFS_BTNUM_MAX] = {
{
XFS_ABTB_MAGIC, XFS_ABTC_MAGIC, XFS_BMAP_MAGIC, XFS_IBT_MAGIC XFS_ABTB_MAGIC, XFS_ABTC_MAGIC, XFS_BMAP_MAGIC, XFS_IBT_MAGIC
}; };
/*
* Prototypes for internal routines.
*/
/*
* Checking routine: return maxrecs for the block.
*/
STATIC int /* number of records fitting in block */
xfs_btree_maxrecs(
xfs_btree_cur_t *cur, /* btree cursor */
xfs_btree_block_t *block);/* generic btree block pointer */
/*
* Internal routines.
*/
/*
* Retrieve the block pointer from the cursor at the given level.
* This may be a bmap btree root or from a buffer.
*/
STATIC xfs_btree_block_t * /* generic btree block pointer */
xfs_btree_get_block(
xfs_btree_cur_t *cur, /* btree cursor */
int level, /* level in btree */
struct xfs_buf **bpp); /* buffer containing the block */
/* /*
* Checking routine: return maxrecs for the block. * Checking routine: return maxrecs for the block.
*/ */
@ -456,35 +429,6 @@ xfs_btree_dup_cursor(
return 0; return 0;
} }
/*
* Change the cursor to point to the first record at the given level.
* Other levels are unaffected.
*/
int /* success=1, failure=0 */
xfs_btree_firstrec(
xfs_btree_cur_t *cur, /* btree cursor */
int level) /* level to change */
{
xfs_btree_block_t *block; /* generic btree block pointer */
xfs_buf_t *bp; /* buffer containing block */
/*
* Get the block pointer for this level.
*/
block = xfs_btree_get_block(cur, level, &bp);
xfs_btree_check_block(cur, block, level, bp);
/*
* It's empty, there is no such record.
*/
if (!block->bb_h.bb_numrecs)
return 0;
/*
* Set the ptr value to 1, that's the first record/key.
*/
cur->bc_ptrs[level] = 1;
return 1;
}
/* /*
* Retrieve the block pointer from the cursor at the given level. * Retrieve the block pointer from the cursor at the given level.
* This may be a bmap btree root or from a buffer. * This may be a bmap btree root or from a buffer.
@ -670,6 +614,35 @@ xfs_btree_islastblock(
return be32_to_cpu(block->bb_u.s.bb_rightsib) == NULLAGBLOCK; return be32_to_cpu(block->bb_u.s.bb_rightsib) == NULLAGBLOCK;
} }
/*
* Change the cursor to point to the first record at the given level.
* Other levels are unaffected.
*/
int /* success=1, failure=0 */
xfs_btree_firstrec(
xfs_btree_cur_t *cur, /* btree cursor */
int level) /* level to change */
{
xfs_btree_block_t *block; /* generic btree block pointer */
xfs_buf_t *bp; /* buffer containing block */
/*
* Get the block pointer for this level.
*/
block = xfs_btree_get_block(cur, level, &bp);
xfs_btree_check_block(cur, block, level, bp);
/*
* It's empty, there is no such record.
*/
if (!block->bb_h.bb_numrecs)
return 0;
/*
* Set the ptr value to 1, that's the first record/key.
*/
cur->bc_ptrs[level] = 1;
return 1;
}
/* /*
* Change the cursor to point to the last record in the current block * Change the cursor to point to the last record in the current block
* at the given level. Other levels are unaffected. * at the given level. Other levels are unaffected.