diff options
Diffstat (limited to '')
| -rw-r--r-- | fs/xfs/xfs_alloc_btree.h | 107 |
1 files changed, 31 insertions, 76 deletions
diff --git a/fs/xfs/xfs_alloc_btree.h b/fs/xfs/xfs_alloc_btree.h index 5bd1a2c8bd07..a6caa0022c9b 100644 --- a/fs/xfs/xfs_alloc_btree.h +++ b/fs/xfs/xfs_alloc_btree.h @@ -24,7 +24,6 @@ struct xfs_buf; struct xfs_btree_cur; -struct xfs_btree_sblock; struct xfs_mount; /* @@ -50,16 +49,6 @@ typedef struct xfs_alloc_rec_incore { /* btree pointer type */ typedef __be32 xfs_alloc_ptr_t; -/* btree block header type */ -typedef struct xfs_btree_sblock xfs_alloc_block_t; - -#define XFS_BUF_TO_ALLOC_BLOCK(bp) ((xfs_alloc_block_t *)XFS_BUF_PTR(bp)) - -/* - * Real block structures have a size equal to the disk block size. - */ -#define XFS_ALLOC_BLOCK_MAXRECS(lev,cur) ((cur)->bc_mp->m_alloc_mxr[lev != 0]) -#define XFS_ALLOC_BLOCK_MINRECS(lev,cur) ((cur)->bc_mp->m_alloc_mnr[lev != 0]) /* * Minimum and maximum blocksize and sectorsize. @@ -83,73 +72,39 @@ typedef struct xfs_btree_sblock xfs_alloc_block_t; #define XFS_CNT_BLOCK(mp) ((xfs_agblock_t)(XFS_BNO_BLOCK(mp) + 1)) /* - * Record, key, and pointer address macros for btree blocks. - */ -#define XFS_ALLOC_REC_ADDR(bb,i,cur) \ - XFS_BTREE_REC_ADDR(xfs_alloc, bb, i) - -#define XFS_ALLOC_KEY_ADDR(bb,i,cur) \ - XFS_BTREE_KEY_ADDR(xfs_alloc, bb, i) - -#define XFS_ALLOC_PTR_ADDR(bb,i,cur) \ - XFS_BTREE_PTR_ADDR(xfs_alloc, bb, i, XFS_ALLOC_BLOCK_MAXRECS(1, cur)) - -/* - * Decrement cursor by one record at the level. - * For nonzero levels the leaf-ward information is untouched. - */ -extern int xfs_alloc_decrement(struct xfs_btree_cur *cur, int level, int *stat); - -/* - * Delete the record pointed to by cur. - * The cursor refers to the place where the record was (could be inserted) - * when the operation returns. - */ -extern int xfs_alloc_delete(struct xfs_btree_cur *cur, int *stat); - -/* - * Get the data from the pointed-to record. - */ -extern int xfs_alloc_get_rec(struct xfs_btree_cur *cur, xfs_agblock_t *bno, - xfs_extlen_t *len, int *stat); - -/* - * Increment cursor by one record at the level. - * For nonzero levels the leaf-ward information is untouched. - */ -extern int xfs_alloc_increment(struct xfs_btree_cur *cur, int level, int *stat); - -/* - * Insert the current record at the point referenced by cur. - * The cursor may be inconsistent on return if splits have been done. - */ -extern int xfs_alloc_insert(struct xfs_btree_cur *cur, int *stat); - -/* - * Lookup the record equal to [bno, len] in the btree given by cur. - */ -extern int xfs_alloc_lookup_eq(struct xfs_btree_cur *cur, xfs_agblock_t bno, - xfs_extlen_t len, int *stat); - -/* - * Lookup the first record greater than or equal to [bno, len] - * in the btree given by cur. - */ -extern int xfs_alloc_lookup_ge(struct xfs_btree_cur *cur, xfs_agblock_t bno, - xfs_extlen_t len, int *stat); - -/* - * Lookup the first record less than or equal to [bno, len] - * in the btree given by cur. + * Btree block header size depends on a superblock flag. + * + * (not quite yet, but soon) */ -extern int xfs_alloc_lookup_le(struct xfs_btree_cur *cur, xfs_agblock_t bno, - xfs_extlen_t len, int *stat); +#define XFS_ALLOC_BLOCK_LEN(mp) XFS_BTREE_SBLOCK_LEN /* - * Update the record referred to by cur, to the value given by [bno, len]. - * This either works (return 0) or gets an EFSCORRUPTED error. - */ -extern int xfs_alloc_update(struct xfs_btree_cur *cur, xfs_agblock_t bno, - xfs_extlen_t len); + * Record, key, and pointer address macros for btree blocks. + * + * (note that some of these may appear unused, but they are used in userspace) + */ +#define XFS_ALLOC_REC_ADDR(mp, block, index) \ + ((xfs_alloc_rec_t *) \ + ((char *)(block) + \ + XFS_ALLOC_BLOCK_LEN(mp) + \ + (((index) - 1) * sizeof(xfs_alloc_rec_t)))) + +#define XFS_ALLOC_KEY_ADDR(mp, block, index) \ + ((xfs_alloc_key_t *) \ + ((char *)(block) + \ + XFS_ALLOC_BLOCK_LEN(mp) + \ + ((index) - 1) * sizeof(xfs_alloc_key_t))) + +#define XFS_ALLOC_PTR_ADDR(mp, block, index, maxrecs) \ + ((xfs_alloc_ptr_t *) \ + ((char *)(block) + \ + XFS_ALLOC_BLOCK_LEN(mp) + \ + (maxrecs) * sizeof(xfs_alloc_key_t) + \ + ((index) - 1) * sizeof(xfs_alloc_ptr_t))) + +extern struct xfs_btree_cur *xfs_allocbt_init_cursor(struct xfs_mount *, + struct xfs_trans *, struct xfs_buf *, + xfs_agnumber_t, xfs_btnum_t); +extern int xfs_allocbt_maxrecs(struct xfs_mount *, int, int); #endif /* __XFS_ALLOC_BTREE_H__ */ |