return error;
}
+/* Determine the low key of a leaf block (simple) */
+void
+xfs_btree_get_leaf_keys(
+ struct xfs_btree_cur *cur,
+ struct xfs_btree_block *block,
+ union xfs_btree_key *key)
+{
+ union xfs_btree_rec *rec;
+
+ rec = xfs_btree_rec_addr(cur, 1, block);
+ cur->bc_ops->init_key_from_rec(key, rec);
+}
+
+/* Determine the low key of a node block (simple) */
+void
+xfs_btree_get_node_keys(
+ struct xfs_btree_cur *cur,
+ struct xfs_btree_block *block,
+ union xfs_btree_key *key)
+{
+ memcpy(key, xfs_btree_key_addr(cur, 1, block), cur->bc_ops->key_len);
+}
+
+/* Derive the keys for any btree block. */
+STATIC void
+xfs_btree_get_keys(
+ struct xfs_btree_cur *cur,
+ struct xfs_btree_block *block,
+ union xfs_btree_key *key)
+{
+ if (be16_to_cpu(block->bb_level) == 0)
+ cur->bc_ops->get_leaf_keys(cur, block, key);
+ else
+ cur->bc_ops->get_node_keys(cur, block, key);
+}
+
/*
- * Update keys at all levels from here to the root along the cursor's path.
+ * Decide if we need to update the parent keys of a btree block. For
+ * a standard btree this is only necessary if we're updating the first
+ * record/key.
*/
-STATIC int
-xfs_btree_updkey(
+static inline bool
+xfs_btree_needs_key_update(
+ struct xfs_btree_cur *cur,
+ int ptr)
+{
+ return ptr == 1;
+}
+
+/*
+ * Update the parent keys of the given level, progressing towards the root.
+ */
+int
+xfs_btree_update_keys(
struct xfs_btree_cur *cur,
- union xfs_btree_key *keyp,
int level)
{
struct xfs_btree_block *block;
struct xfs_buf *bp;
union xfs_btree_key *kp;
+ union xfs_btree_key key;
int ptr;
XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY);
XFS_BTREE_TRACE_ARGIK(cur, level, keyp);
- ASSERT(!(cur->bc_flags & XFS_BTREE_ROOT_IN_INODE) || level >= 1);
+ ASSERT(level >= 0);
/*
* Go up the tree from this level toward the root.
* Stop when we reach a level where the cursor isn't pointing
* at the first entry in the block.
*/
- for (ptr = 1; ptr == 1 && level < cur->bc_nlevels; level++) {
+ block = xfs_btree_get_block(cur, level, &bp);
+ xfs_btree_get_keys(cur, block, &key);
+ for (level++, ptr = 1; ptr == 1 && level < cur->bc_nlevels; level++) {
#ifdef DEBUG
int error;
#endif
#endif
ptr = cur->bc_ptrs[level];
kp = xfs_btree_key_addr(cur, ptr, block);
- xfs_btree_copy_keys(cur, kp, keyp, 1);
+ xfs_btree_copy_keys(cur, kp, &key, 1);
xfs_btree_log_keys(cur, bp, ptr, ptr);
}
}
/* Updating first rec in leaf. Pass new key value up to our parent. */
- if (ptr == 1) {
- union xfs_btree_key key;
-
- cur->bc_ops->init_key_from_rec(&key, rec);
- error = xfs_btree_updkey(cur, &key, 1);
+ if (xfs_btree_needs_key_update(cur, ptr)) {
+ error = cur->bc_ops->update_keys(cur, 0);
if (error)
goto error0;
}
*/
cur->bc_ops->init_key_from_rec(&key,
xfs_btree_rec_addr(cur, 1, right));
- rkp = &key;
}
- /* Update the parent key values of right. */
- error = xfs_btree_updkey(cur, rkp, level + 1);
+ /* Update the parent keys of the right block. */
+ error = cur->bc_ops->update_keys(cur, level);
if (error)
goto error0;
xfs_btree_log_recs(cur, rbp, 1, rrecs + 1);
cur->bc_ops->init_key_from_rec(&key, rrp);
- rkp = &key;
ASSERT(cur->bc_ops->recs_inorder(cur, rrp,
xfs_btree_rec_addr(cur, 2, right)));
if (error)
goto error1;
- error = xfs_btree_updkey(tcur, rkp, level + 1);
+ /* Update the parent keys of the right block. */
+ error = cur->bc_ops->update_keys(tcur, level);
if (error)
goto error1;
XFS_BTREE_STATS_ADD(cur, moves, rrecs);
+ /* Adjust numrecs for the later get_*_keys() calls. */
+ lrecs -= rrecs;
+ xfs_btree_set_numrecs(left, lrecs);
+ xfs_btree_set_numrecs(right, xfs_btree_get_numrecs(right) + rrecs);
+
/*
* Copy btree block entries from the left block over to the
* new block, the right. Update the right block and log the
}
#endif
+ /* Copy the keys & pointers to the new block. */
xfs_btree_copy_keys(cur, rkp, lkp, rrecs);
xfs_btree_copy_ptrs(cur, rpp, lpp, rrecs);
xfs_btree_log_keys(cur, rbp, 1, rrecs);
xfs_btree_log_ptrs(cur, rbp, 1, rrecs);
- /* Grab the keys to the entries moved to the right block */
- xfs_btree_copy_keys(cur, key, rkp, 1);
+ /* Stash the keys of the new block for later insertion. */
+ cur->bc_ops->get_node_keys(cur, right, key);
} else {
/* It's a leaf. Move records. */
union xfs_btree_rec *lrp; /* left record pointer */
lrp = xfs_btree_rec_addr(cur, src_index, left);
rrp = xfs_btree_rec_addr(cur, 1, right);
+ /* Copy records to the new block. */
xfs_btree_copy_recs(cur, rrp, lrp, rrecs);
xfs_btree_log_recs(cur, rbp, 1, rrecs);
- cur->bc_ops->init_key_from_rec(key,
- xfs_btree_rec_addr(cur, 1, right));
+ /* Stash the keys of the new block for later insertion. */
+ cur->bc_ops->get_leaf_keys(cur, right, key);
}
-
/*
* Find the left block number by looking in the buffer.
- * Adjust numrecs, sibling pointers.
+ * Adjust sibling pointers.
*/
xfs_btree_get_sibling(cur, left, &rrptr, XFS_BB_RIGHTSIB);
xfs_btree_set_sibling(cur, right, &rrptr, XFS_BB_RIGHTSIB);
xfs_btree_set_sibling(cur, right, &lptr, XFS_BB_LEFTSIB);
xfs_btree_set_sibling(cur, left, &rptr, XFS_BB_RIGHTSIB);
- lrecs -= rrecs;
- xfs_btree_set_numrecs(left, lrecs);
- xfs_btree_set_numrecs(right, xfs_btree_get_numrecs(right) + rrecs);
-
xfs_btree_log_block(cur, rbp, XFS_BB_ALL_BITS);
xfs_btree_log_block(cur, lbp, XFS_BB_NUMRECS | XFS_BB_RIGHTSIB);
bp = lbp;
nptr = 2;
}
+
/* Fill in the new block's btree header and log it. */
xfs_btree_init_block_cur(cur, nbp, cur->bc_nlevels, 2);
xfs_btree_log_block(cur, nbp, XFS_BB_ALL_BITS);
/* Fill in the key data in the new root. */
if (xfs_btree_get_level(left) > 0) {
- xfs_btree_copy_keys(cur,
- xfs_btree_key_addr(cur, 1, new),
- xfs_btree_key_addr(cur, 1, left), 1);
- xfs_btree_copy_keys(cur,
- xfs_btree_key_addr(cur, 2, new),
- xfs_btree_key_addr(cur, 1, right), 1);
+ /*
+ * Get the keys for the left block's keys and put them directly
+ * in the parent block. Do the same for the right block.
+ */
+ cur->bc_ops->get_node_keys(cur, left,
+ xfs_btree_key_addr(cur, 1, new));
+ cur->bc_ops->get_node_keys(cur, right,
+ xfs_btree_key_addr(cur, 2, new));
} else {
- cur->bc_ops->init_key_from_rec(
- xfs_btree_key_addr(cur, 1, new),
- xfs_btree_rec_addr(cur, 1, left));
- cur->bc_ops->init_key_from_rec(
- xfs_btree_key_addr(cur, 2, new),
- xfs_btree_rec_addr(cur, 1, right));
+ /*
+ * Get the keys for the left block's records and put them
+ * directly in the parent block. Do the same for the right
+ * block.
+ */
+ cur->bc_ops->get_leaf_keys(cur, left,
+ xfs_btree_key_addr(cur, 1, new));
+ cur->bc_ops->get_leaf_keys(cur, right,
+ xfs_btree_key_addr(cur, 2, new));
}
xfs_btree_log_keys(cur, nbp, 1, 2);
int *index, /* new tree index */
union xfs_btree_ptr *nptr, /* new btree ptr */
struct xfs_btree_cur **ncur, /* new btree cursor */
- union xfs_btree_key *key, /* key of new block */
+ union xfs_btree_key *key, /* key of new block */
int *stat)
{
int error = 0;
xfs_btree_log_block(cur, bp, XFS_BB_NUMRECS);
/* If we inserted at the start of a block, update the parents' keys. */
- if (optr == 1) {
- error = xfs_btree_updkey(cur, key, level + 1);
+ if (xfs_btree_needs_key_update(cur, optr)) {
+ error = cur->bc_ops->update_keys(cur, level);
if (error)
goto error0;
}
*/
*ptrp = nptr;
if (!xfs_btree_ptr_is_null(cur, &nptr)) {
- *key = nkey;
+ xfs_btree_copy_keys(cur, key, &nkey, 1);
*curp = ncur;
}
struct xfs_buf *bp; /* buffer for block */
int error; /* error return value */
int i; /* loop counter */
- union xfs_btree_key key; /* storage for keyp */
- union xfs_btree_key *keyp = &key; /* passed to the next level */
union xfs_btree_ptr lptr; /* left sibling block ptr */
struct xfs_buf *lbp; /* left buffer pointer */
struct xfs_btree_block *left; /* left btree block */
xfs_btree_log_keys(cur, bp, ptr, numrecs - 1);
xfs_btree_log_ptrs(cur, bp, ptr, numrecs - 1);
}
-
- /*
- * If it's the first record in the block, we'll need to pass a
- * key up to the next level (updkey).
- */
- if (ptr == 1)
- keyp = xfs_btree_key_addr(cur, 1, block);
} else {
/* It's a leaf. operate on records */
if (ptr < numrecs) {
-1, numrecs - ptr);
xfs_btree_log_recs(cur, bp, ptr, numrecs - 1);
}
-
- /*
- * If it's the first record in the block, we'll need a key
- * structure to pass up to the next level (updkey).
- */
- if (ptr == 1) {
- cur->bc_ops->init_key_from_rec(&key,
- xfs_btree_rec_addr(cur, 1, block));
- keyp = &key;
- }
}
/*
* If we deleted the leftmost entry in the block, update the
* key values above us in the tree.
*/
- if (ptr == 1) {
- error = xfs_btree_updkey(cur, keyp, level + 1);
+ if (xfs_btree_needs_key_update(cur, ptr)) {
+ error = cur->bc_ops->update_keys(cur, level);
if (error)
goto error0;
}
projects / platform / kernel / linux-exynos.git / commitdiff