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[XFS] implement generic xfs_btree_get_rec

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Not really much reason to make it generic given that it's so small, but
this is the last non-method in xfs_alloc_btree.c and xfs_ialloc_btree.c,
so it makes the whole btree implementation more structured.

SGI-PV: 985583

SGI-Modid: xfs-linux-melb:xfs-kern:32206a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Bill O'Donnell <billodo@sgi.com>
Signed-off-by: David Chinner <david@fromorbit.com>
This commit is contained in:
Christoph Hellwig
2008-10-30 16:58:11 +11:00
committed by Lachlan McIlroy
parent 91cca5df9b
commit 8cc938fe42
9 changed files with 91 additions and 101 deletions
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44
fs/xfs/xfs_alloc_btree.c
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@@ -41,50 +41,6 @@
#include "xfs_error.h"
/*
* Get the data from the pointed-to record.
*/
int /* error */
xfs_alloc_get_rec(
xfs_btree_cur_t *cur, /* btree cursor */
xfs_agblock_t *bno, /* output: starting block of extent */
xfs_extlen_t *len, /* output: length of extent */
int *stat) /* output: success/failure */
{
xfs_alloc_block_t *block; /* btree block */
#ifdef DEBUG
int error; /* error return value */
#endif
int ptr; /* record number */
ptr = cur->bc_ptrs[0];
block = XFS_BUF_TO_ALLOC_BLOCK(cur->bc_bufs[0]);
#ifdef DEBUG
if ((error = xfs_btree_check_sblock(cur, block, 0, cur->bc_bufs[0])))
return error;
#endif
/*
* Off the right end or left end, return failure.
*/
if (ptr > be16_to_cpu(block->bb_numrecs) || ptr <= 0) {
*stat = 0;
return 0;
}
/*
* Point to the record and extract its data.
*/
{
xfs_alloc_rec_t *rec; /* record data */
rec = XFS_ALLOC_REC_ADDR(block, ptr, cur);
*bno = be32_to_cpu(rec->ar_startblock);
*len = be32_to_cpu(rec->ar_blockcount);
}
*stat = 1;
return 0;
}
STATIC struct xfs_btree_cur *
xfs_allocbt_dup_cursor(
struct xfs_btree_cur *cur)