STATIC void xfs_alloc_log_keys(xfs_btree_cur_t *, xfs_buf_t *, int, int);
STATIC void xfs_alloc_log_ptrs(xfs_btree_cur_t *, xfs_buf_t *, int, int);
STATIC void xfs_alloc_log_recs(xfs_btree_cur_t *, xfs_buf_t *, int, int);
-STATIC int xfs_alloc_newroot(xfs_btree_cur_t *, int *);
/*
* Internal functions.
*/
if (level >= cur->bc_nlevels) {
XFS_STATS_INC(xs_abt_insrec);
- if ((error = xfs_alloc_newroot(cur, &i)))
+ if ((error = xfs_btree_new_root(cur, &i)))
return error;
*bnop = NULLAGBLOCK;
*stat = i;
xfs_trans_log_buf(cur->bc_tp, bp, first, last);
}
-/*
- * Allocate a new root block, fill it in.
- */
-STATIC int /* error */
-xfs_alloc_newroot(
- xfs_btree_cur_t *cur, /* btree cursor */
- int *stat) /* success/failure */
-{
- int error; /* error return value */
- xfs_agblock_t lbno; /* left block number */
- xfs_buf_t *lbp; /* left btree buffer */
- xfs_alloc_block_t *left; /* left btree block */
- xfs_mount_t *mp; /* mount structure */
- xfs_agblock_t nbno; /* new block number */
- xfs_buf_t *nbp; /* new (root) buffer */
- xfs_alloc_block_t *new; /* new (root) btree block */
- int nptr; /* new value for key index, 1 or 2 */
- xfs_agblock_t rbno; /* right block number */
- xfs_buf_t *rbp; /* right btree buffer */
- xfs_alloc_block_t *right; /* right btree block */
-
- mp = cur->bc_mp;
-
- ASSERT(cur->bc_nlevels < XFS_AG_MAXLEVELS(mp));
- /*
- * Get a buffer from the freelist blocks, for the new root.
- */
- error = xfs_alloc_get_freelist(cur->bc_tp,
- cur->bc_private.a.agbp, &nbno, 1);
- if (error)
- return error;
- /*
- * None available, we fail.
- */
- if (nbno == NULLAGBLOCK) {
- *stat = 0;
- return 0;
- }
- xfs_trans_agbtree_delta(cur->bc_tp, 1);
- nbp = xfs_btree_get_bufs(mp, cur->bc_tp, cur->bc_private.a.agno, nbno,
- 0);
- new = XFS_BUF_TO_ALLOC_BLOCK(nbp);
- /*
- * Set the root data in the a.g. freespace structure.
- */
- {
- xfs_agf_t *agf; /* a.g. freespace header */
- xfs_agnumber_t seqno;
-
- agf = XFS_BUF_TO_AGF(cur->bc_private.a.agbp);
- agf->agf_roots[cur->bc_btnum] = cpu_to_be32(nbno);
- be32_add_cpu(&agf->agf_levels[cur->bc_btnum], 1);
- seqno = be32_to_cpu(agf->agf_seqno);
- mp->m_perag[seqno].pagf_levels[cur->bc_btnum]++;
- xfs_alloc_log_agf(cur->bc_tp, cur->bc_private.a.agbp,
- XFS_AGF_ROOTS | XFS_AGF_LEVELS);
- }
- /*
- * At the previous root level there are now two blocks: the old
- * root, and the new block generated when it was split.
- * We don't know which one the cursor is pointing at, so we
- * set up variables "left" and "right" for each case.
- */
- lbp = cur->bc_bufs[cur->bc_nlevels - 1];
- left = XFS_BUF_TO_ALLOC_BLOCK(lbp);
-#ifdef DEBUG
- if ((error = xfs_btree_check_sblock(cur, left, cur->bc_nlevels - 1, lbp)))
- return error;
-#endif
- if (be32_to_cpu(left->bb_rightsib) != NULLAGBLOCK) {
- /*
- * Our block is left, pick up the right block.
- */
- lbno = XFS_DADDR_TO_AGBNO(mp, XFS_BUF_ADDR(lbp));
- rbno = be32_to_cpu(left->bb_rightsib);
- if ((error = xfs_btree_read_bufs(mp, cur->bc_tp,
- cur->bc_private.a.agno, rbno, 0, &rbp,
- XFS_ALLOC_BTREE_REF)))
- return error;
- right = XFS_BUF_TO_ALLOC_BLOCK(rbp);
- if ((error = xfs_btree_check_sblock(cur, right,
- cur->bc_nlevels - 1, rbp)))
- return error;
- nptr = 1;
- } else {
- /*
- * Our block is right, pick up the left block.
- */
- rbp = lbp;
- right = left;
- rbno = XFS_DADDR_TO_AGBNO(mp, XFS_BUF_ADDR(rbp));
- lbno = be32_to_cpu(right->bb_leftsib);
- if ((error = xfs_btree_read_bufs(mp, cur->bc_tp,
- cur->bc_private.a.agno, lbno, 0, &lbp,
- XFS_ALLOC_BTREE_REF)))
- return error;
- left = XFS_BUF_TO_ALLOC_BLOCK(lbp);
- if ((error = xfs_btree_check_sblock(cur, left,
- cur->bc_nlevels - 1, lbp)))
- return error;
- nptr = 2;
- }
- /*
- * Fill in the new block's btree header and log it.
- */
- new->bb_magic = cpu_to_be32(xfs_magics[cur->bc_btnum]);
- new->bb_level = cpu_to_be16(cur->bc_nlevels);
- new->bb_numrecs = cpu_to_be16(2);
- new->bb_leftsib = cpu_to_be32(NULLAGBLOCK);
- new->bb_rightsib = cpu_to_be32(NULLAGBLOCK);
- xfs_alloc_log_block(cur->bc_tp, nbp, XFS_BB_ALL_BITS);
- ASSERT(lbno != NULLAGBLOCK && rbno != NULLAGBLOCK);
- /*
- * Fill in the key data in the new root.
- */
- {
- xfs_alloc_key_t *kp; /* btree key pointer */
-
- kp = XFS_ALLOC_KEY_ADDR(new, 1, cur);
- if (be16_to_cpu(left->bb_level) > 0) {
- kp[0] = *XFS_ALLOC_KEY_ADDR(left, 1, cur);
- kp[1] = *XFS_ALLOC_KEY_ADDR(right, 1, cur);
- } else {
- xfs_alloc_rec_t *rp; /* btree record pointer */
-
- rp = XFS_ALLOC_REC_ADDR(left, 1, cur);
- kp[0].ar_startblock = rp->ar_startblock;
- kp[0].ar_blockcount = rp->ar_blockcount;
- rp = XFS_ALLOC_REC_ADDR(right, 1, cur);
- kp[1].ar_startblock = rp->ar_startblock;
- kp[1].ar_blockcount = rp->ar_blockcount;
- }
- }
- xfs_alloc_log_keys(cur, nbp, 1, 2);
- /*
- * Fill in the pointer data in the new root.
- */
- {
- xfs_alloc_ptr_t *pp; /* btree address pointer */
-
- pp = XFS_ALLOC_PTR_ADDR(new, 1, cur);
- pp[0] = cpu_to_be32(lbno);
- pp[1] = cpu_to_be32(rbno);
- }
- xfs_alloc_log_ptrs(cur, nbp, 1, 2);
- /*
- * Fix up the cursor.
- */
- xfs_btree_setbuf(cur, cur->bc_nlevels, nbp);
- cur->bc_ptrs[cur->bc_nlevels] = nptr;
- cur->bc_nlevels++;
- *stat = 1;
- return 0;
-}
-
/*
* Externally visible routines.
cur->bc_btnum);
}
+STATIC void
+xfs_allocbt_set_root(
+ struct xfs_btree_cur *cur,
+ union xfs_btree_ptr *ptr,
+ int inc)
+{
+ struct xfs_buf *agbp = cur->bc_private.a.agbp;
+ struct xfs_agf *agf = XFS_BUF_TO_AGF(agbp);
+ xfs_agnumber_t seqno = be32_to_cpu(agf->agf_seqno);
+ int btnum = cur->bc_btnum;
+
+ ASSERT(ptr->s != 0);
+
+ agf->agf_roots[btnum] = ptr->s;
+ be32_add_cpu(&agf->agf_levels[btnum], inc);
+ cur->bc_mp->m_perag[seqno].pagf_levels[btnum] += inc;
+
+ xfs_alloc_log_agf(cur->bc_tp, agbp, XFS_AGF_ROOTS | XFS_AGF_LEVELS);
+}
+
STATIC int
xfs_allocbt_alloc_block(
struct xfs_btree_cur *cur,
.key_len = sizeof(xfs_alloc_key_t),
.dup_cursor = xfs_allocbt_dup_cursor,
+ .set_root = xfs_allocbt_set_root,
.alloc_block = xfs_allocbt_alloc_block,
.update_lastrec = xfs_allocbt_update_lastrec,
.get_maxrecs = xfs_allocbt_get_maxrecs,
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff