struct xfs_buf;
struct xfs_btree_cur;
-struct xfs_btree_sblock;
struct xfs_mount;
/*
#define XFS_IBT_MAGIC 0x49414254 /* 'IABT' */
typedef __uint64_t xfs_inofree_t;
-#define XFS_INODES_PER_CHUNK (NBBY * sizeof(xfs_inofree_t))
+#define XFS_INODES_PER_CHUNK (NBBY * sizeof(xfs_inofree_t))
#define XFS_INODES_PER_CHUNK_LOG (XFS_NBBYLOG + 3)
-#define XFS_INOBT_ALL_FREE ((xfs_inofree_t)-1)
+#define XFS_INOBT_ALL_FREE ((xfs_inofree_t)-1)
+#define XFS_INOBT_MASK(i) ((xfs_inofree_t)1 << (i))
-#define XFS_INOBT_MASKN(i,n) xfs_inobt_maskn(i,n)
static inline xfs_inofree_t xfs_inobt_maskn(int i, int n)
{
- return (((n) >= XFS_INODES_PER_CHUNK ? \
- (xfs_inofree_t)0 : ((xfs_inofree_t)1 << (n))) - 1) << (i);
+ return ((n >= XFS_INODES_PER_CHUNK ? 0 : XFS_INOBT_MASK(n)) - 1) << i;
}
/*
/* btree pointer type */
typedef __be32 xfs_inobt_ptr_t;
-/* btree block header type */
-typedef struct xfs_btree_sblock xfs_inobt_block_t;
-
-#define XFS_BUF_TO_INOBT_BLOCK(bp) ((xfs_inobt_block_t *)XFS_BUF_PTR(bp))
-
-/*
- * Bit manipulations for ir_free.
- */
-#define XFS_INOBT_MASK(i) ((xfs_inofree_t)1 << (i))
-#define XFS_INOBT_IS_FREE(rp,i) \
- (((rp)->ir_free & XFS_INOBT_MASK(i)) != 0)
-#define XFS_INOBT_IS_FREE_DISK(rp,i) \
- ((be64_to_cpu((rp)->ir_free) & XFS_INOBT_MASK(i)) != 0)
-#define XFS_INOBT_SET_FREE(rp,i) ((rp)->ir_free |= XFS_INOBT_MASK(i))
-#define XFS_INOBT_CLR_FREE(rp,i) ((rp)->ir_free &= ~XFS_INOBT_MASK(i))
-
-/*
- * Real block structures have a size equal to the disk block size.
- */
-#define XFS_INOBT_BLOCK_SIZE(lev,cur) (1 << (cur)->bc_blocklog)
-#define XFS_INOBT_BLOCK_MAXRECS(lev,cur) ((cur)->bc_mp->m_inobt_mxr[lev != 0])
-#define XFS_INOBT_BLOCK_MINRECS(lev,cur) ((cur)->bc_mp->m_inobt_mnr[lev != 0])
-#define XFS_INOBT_IS_LAST_REC(cur) \
- ((cur)->bc_ptrs[0] == be16_to_cpu(XFS_BUF_TO_INOBT_BLOCK((cur)->bc_bufs[0])->bb_numrecs))
-
-/*
- * Maximum number of inode btree levels.
- */
-#define XFS_IN_MAXLEVELS(mp) ((mp)->m_in_maxlevels)
-
/*
* block numbers in the AG.
*/
#define XFS_PREALLOC_BLOCKS(mp) ((xfs_agblock_t)(XFS_IBT_BLOCK(mp) + 1))
/*
- * Record, key, and pointer address macros for btree blocks.
- */
-#define XFS_INOBT_REC_ADDR(bb,i,cur) \
- (XFS_BTREE_REC_ADDR(XFS_INOBT_BLOCK_SIZE(0,cur), xfs_inobt, bb, \
- i, XFS_INOBT_BLOCK_MAXRECS(0, cur)))
-#define XFS_INOBT_KEY_ADDR(bb,i,cur) \
- (XFS_BTREE_KEY_ADDR(XFS_INOBT_BLOCK_SIZE(1,cur), xfs_inobt, bb, \
- i, XFS_INOBT_BLOCK_MAXRECS(1, cur)))
-
-#define XFS_INOBT_PTR_ADDR(bb,i,cur) \
- (XFS_BTREE_PTR_ADDR(XFS_INOBT_BLOCK_SIZE(1,cur), xfs_inobt, bb, \
- i, XFS_INOBT_BLOCK_MAXRECS(1, cur)))
-
-/*
- * Decrement cursor by one record at the level.
- * For nonzero levels the leaf-ward information is untouched.
- */
-extern int xfs_inobt_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_inobt_delete(struct xfs_btree_cur *cur, int *stat);
-
-/*
- * Get the data from the pointed-to record.
- */
-extern int xfs_inobt_get_rec(struct xfs_btree_cur *cur, xfs_agino_t *ino,
- __int32_t *fcnt, xfs_inofree_t *free, int *stat);
-
-/*
- * Increment cursor by one record at the level.
- * For nonzero levels the leaf-ward information is untouched.
- */
-extern int xfs_inobt_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_inobt_insert(struct xfs_btree_cur *cur, int *stat);
-
-/*
- * Lookup the record equal to ino in the btree given by cur.
- */
-extern int xfs_inobt_lookup_eq(struct xfs_btree_cur *cur, xfs_agino_t ino,
- __int32_t fcnt, xfs_inofree_t free, int *stat);
-
-/*
- * Lookup the first record greater than or equal to ino
- * in the btree given by cur.
- */
-extern int xfs_inobt_lookup_ge(struct xfs_btree_cur *cur, xfs_agino_t ino,
- __int32_t fcnt, xfs_inofree_t free, int *stat);
-
-/*
- * Lookup the first record less than or equal to ino
- * in the btree given by cur.
+ * Btree block header size depends on a superblock flag.
+ *
+ * (not quite yet, but soon)
*/
-extern int xfs_inobt_lookup_le(struct xfs_btree_cur *cur, xfs_agino_t ino,
- __int32_t fcnt, xfs_inofree_t free, int *stat);
+#define XFS_INOBT_BLOCK_LEN(mp) XFS_BTREE_SBLOCK_LEN
/*
- * Update the record referred to by cur, to the value given
- * by [ino, fcnt, free].
- * This either works (return 0) or gets an EFSCORRUPTED error.
- */
-extern int xfs_inobt_update(struct xfs_btree_cur *cur, xfs_agino_t ino,
- __int32_t fcnt, xfs_inofree_t free);
+ * 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_INOBT_REC_ADDR(mp, block, index) \
+ ((xfs_inobt_rec_t *) \
+ ((char *)(block) + \
+ XFS_INOBT_BLOCK_LEN(mp) + \
+ (((index) - 1) * sizeof(xfs_inobt_rec_t))))
+
+#define XFS_INOBT_KEY_ADDR(mp, block, index) \
+ ((xfs_inobt_key_t *) \
+ ((char *)(block) + \
+ XFS_INOBT_BLOCK_LEN(mp) + \
+ ((index) - 1) * sizeof(xfs_inobt_key_t)))
+
+#define XFS_INOBT_PTR_ADDR(mp, block, index, maxrecs) \
+ ((xfs_inobt_ptr_t *) \
+ ((char *)(block) + \
+ XFS_INOBT_BLOCK_LEN(mp) + \
+ (maxrecs) * sizeof(xfs_inobt_key_t) + \
+ ((index) - 1) * sizeof(xfs_inobt_ptr_t)))
+
+extern struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_mount *,
+ struct xfs_trans *, struct xfs_buf *, xfs_agnumber_t);
+extern int xfs_inobt_maxrecs(struct xfs_mount *, int, int);
#endif /* __XFS_IALLOC_BTREE_H__ */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff