xfs: add function pointers for get/update keys to the btree
Add some function pointers to bc_ops to get the btree keys for leaf and node blocks, and to update parent keys of a block. Convert the _btree_updkey calls to use our new pointer, and modify the tree shape changing code to call the appropriate get_*_keys pointer instead of _btree_copy_keys because the overlapping btree has to calculate high key values. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Родитель
e5821e57af
Коммит
70b2265935
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@ -403,6 +403,10 @@ static const struct xfs_btree_ops xfs_allocbt_ops = {
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.keys_inorder = xfs_allocbt_keys_inorder,
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.recs_inorder = xfs_allocbt_recs_inorder,
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#endif
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.get_leaf_keys = xfs_btree_get_leaf_keys,
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.get_node_keys = xfs_btree_get_node_keys,
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.update_keys = xfs_btree_update_keys,
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};
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/*
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@ -757,6 +757,10 @@ static const struct xfs_btree_ops xfs_bmbt_ops = {
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.keys_inorder = xfs_bmbt_keys_inorder,
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.recs_inorder = xfs_bmbt_recs_inorder,
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#endif
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.get_leaf_keys = xfs_btree_get_leaf_keys,
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.get_node_keys = xfs_btree_get_node_keys,
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.update_keys = xfs_btree_update_keys,
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};
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/*
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@ -1879,24 +1879,73 @@ error0:
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return error;
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}
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/*
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* Update keys at all levels from here to the root along the cursor's path.
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*/
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STATIC int
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xfs_btree_updkey(
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/* Determine the low key of a leaf block (simple) */
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void
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xfs_btree_get_leaf_keys(
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struct xfs_btree_cur *cur,
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struct xfs_btree_block *block,
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union xfs_btree_key *key)
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{
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union xfs_btree_rec *rec;
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rec = xfs_btree_rec_addr(cur, 1, block);
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cur->bc_ops->init_key_from_rec(key, rec);
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}
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/* Determine the low key of a node block (simple) */
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void
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xfs_btree_get_node_keys(
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struct xfs_btree_cur *cur,
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struct xfs_btree_block *block,
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union xfs_btree_key *key)
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{
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memcpy(key, xfs_btree_key_addr(cur, 1, block), cur->bc_ops->key_len);
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}
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/* Derive the keys for any btree block. */
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STATIC void
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xfs_btree_get_keys(
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struct xfs_btree_cur *cur,
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struct xfs_btree_block *block,
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union xfs_btree_key *key)
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{
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if (be16_to_cpu(block->bb_level) == 0)
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cur->bc_ops->get_leaf_keys(cur, block, key);
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else
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cur->bc_ops->get_node_keys(cur, block, key);
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}
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/*
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* Decide if we need to update the parent keys of a btree block. For
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* a standard btree this is only necessary if we're updating the first
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* record/key.
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*/
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static inline bool
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xfs_btree_needs_key_update(
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struct xfs_btree_cur *cur,
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int ptr)
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{
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return ptr == 1;
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}
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/*
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* Update the parent keys of the given level, progressing towards the root.
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*/
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int
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xfs_btree_update_keys(
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struct xfs_btree_cur *cur,
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union xfs_btree_key *keyp,
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int level)
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{
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struct xfs_btree_block *block;
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struct xfs_buf *bp;
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union xfs_btree_key *kp;
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union xfs_btree_key key;
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int ptr;
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XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY);
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XFS_BTREE_TRACE_ARGIK(cur, level, keyp);
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ASSERT(!(cur->bc_flags & XFS_BTREE_ROOT_IN_INODE) || level >= 1);
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ASSERT(level >= 0);
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/*
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* Go up the tree from this level toward the root.
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@ -1904,7 +1953,9 @@ xfs_btree_updkey(
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* Stop when we reach a level where the cursor isn't pointing
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* at the first entry in the block.
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*/
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for (ptr = 1; ptr == 1 && level < cur->bc_nlevels; level++) {
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block = xfs_btree_get_block(cur, level, &bp);
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xfs_btree_get_keys(cur, block, &key);
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for (level++, ptr = 1; ptr == 1 && level < cur->bc_nlevels; level++) {
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#ifdef DEBUG
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int error;
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#endif
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@ -1918,7 +1969,7 @@ xfs_btree_updkey(
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#endif
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ptr = cur->bc_ptrs[level];
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kp = xfs_btree_key_addr(cur, ptr, block);
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xfs_btree_copy_keys(cur, kp, keyp, 1);
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xfs_btree_copy_keys(cur, kp, &key, 1);
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xfs_btree_log_keys(cur, bp, ptr, ptr);
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}
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@ -1971,11 +2022,8 @@ xfs_btree_update(
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}
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/* Updating first rec in leaf. Pass new key value up to our parent. */
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if (ptr == 1) {
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union xfs_btree_key key;
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cur->bc_ops->init_key_from_rec(&key, rec);
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error = xfs_btree_updkey(cur, &key, 1);
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if (xfs_btree_needs_key_update(cur, ptr)) {
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error = cur->bc_ops->update_keys(cur, 0);
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if (error)
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goto error0;
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}
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@ -2146,11 +2194,10 @@ xfs_btree_lshift(
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*/
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cur->bc_ops->init_key_from_rec(&key,
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xfs_btree_rec_addr(cur, 1, right));
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rkp = &key;
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}
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/* Update the parent key values of right. */
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error = xfs_btree_updkey(cur, rkp, level + 1);
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/* Update the parent keys of the right block. */
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error = cur->bc_ops->update_keys(cur, level);
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if (error)
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goto error0;
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@ -2292,7 +2339,6 @@ xfs_btree_rshift(
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xfs_btree_log_recs(cur, rbp, 1, rrecs + 1);
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cur->bc_ops->init_key_from_rec(&key, rrp);
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rkp = &key;
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ASSERT(cur->bc_ops->recs_inorder(cur, rrp,
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xfs_btree_rec_addr(cur, 2, right)));
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@ -2321,7 +2367,8 @@ xfs_btree_rshift(
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if (error)
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goto error1;
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error = xfs_btree_updkey(tcur, rkp, level + 1);
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/* Update the parent keys of the right block. */
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error = cur->bc_ops->update_keys(tcur, level);
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if (error)
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goto error1;
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@ -2422,6 +2469,11 @@ __xfs_btree_split(
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XFS_BTREE_STATS_ADD(cur, moves, rrecs);
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/* Adjust numrecs for the later get_*_keys() calls. */
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lrecs -= rrecs;
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xfs_btree_set_numrecs(left, lrecs);
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xfs_btree_set_numrecs(right, xfs_btree_get_numrecs(right) + rrecs);
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/*
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* Copy btree block entries from the left block over to the
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* new block, the right. Update the right block and log the
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@ -2447,14 +2499,15 @@ __xfs_btree_split(
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}
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#endif
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/* Copy the keys & pointers to the new block. */
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xfs_btree_copy_keys(cur, rkp, lkp, rrecs);
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xfs_btree_copy_ptrs(cur, rpp, lpp, rrecs);
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xfs_btree_log_keys(cur, rbp, 1, rrecs);
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xfs_btree_log_ptrs(cur, rbp, 1, rrecs);
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/* Grab the keys to the entries moved to the right block */
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xfs_btree_copy_keys(cur, key, rkp, 1);
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/* Stash the keys of the new block for later insertion. */
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cur->bc_ops->get_node_keys(cur, right, key);
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} else {
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/* It's a leaf. Move records. */
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union xfs_btree_rec *lrp; /* left record pointer */
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@ -2463,27 +2516,23 @@ __xfs_btree_split(
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lrp = xfs_btree_rec_addr(cur, src_index, left);
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rrp = xfs_btree_rec_addr(cur, 1, right);
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/* Copy records to the new block. */
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xfs_btree_copy_recs(cur, rrp, lrp, rrecs);
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xfs_btree_log_recs(cur, rbp, 1, rrecs);
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cur->bc_ops->init_key_from_rec(key,
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xfs_btree_rec_addr(cur, 1, right));
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/* Stash the keys of the new block for later insertion. */
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cur->bc_ops->get_leaf_keys(cur, right, key);
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}
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/*
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* Find the left block number by looking in the buffer.
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* Adjust numrecs, sibling pointers.
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* Adjust sibling pointers.
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*/
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xfs_btree_get_sibling(cur, left, &rrptr, XFS_BB_RIGHTSIB);
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xfs_btree_set_sibling(cur, right, &rrptr, XFS_BB_RIGHTSIB);
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xfs_btree_set_sibling(cur, right, &lptr, XFS_BB_LEFTSIB);
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xfs_btree_set_sibling(cur, left, &rptr, XFS_BB_RIGHTSIB);
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lrecs -= rrecs;
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xfs_btree_set_numrecs(left, lrecs);
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xfs_btree_set_numrecs(right, xfs_btree_get_numrecs(right) + rrecs);
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xfs_btree_log_block(cur, rbp, XFS_BB_ALL_BITS);
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xfs_btree_log_block(cur, lbp, XFS_BB_NUMRECS | XFS_BB_RIGHTSIB);
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@ -2802,6 +2851,7 @@ xfs_btree_new_root(
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bp = lbp;
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nptr = 2;
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}
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/* Fill in the new block's btree header and log it. */
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xfs_btree_init_block_cur(cur, nbp, cur->bc_nlevels, 2);
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xfs_btree_log_block(cur, nbp, XFS_BB_ALL_BITS);
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@ -2810,19 +2860,24 @@ xfs_btree_new_root(
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/* Fill in the key data in the new root. */
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if (xfs_btree_get_level(left) > 0) {
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xfs_btree_copy_keys(cur,
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xfs_btree_key_addr(cur, 1, new),
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xfs_btree_key_addr(cur, 1, left), 1);
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xfs_btree_copy_keys(cur,
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xfs_btree_key_addr(cur, 2, new),
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xfs_btree_key_addr(cur, 1, right), 1);
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/*
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* Get the keys for the left block's keys and put them directly
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* in the parent block. Do the same for the right block.
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*/
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cur->bc_ops->get_node_keys(cur, left,
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xfs_btree_key_addr(cur, 1, new));
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cur->bc_ops->get_node_keys(cur, right,
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xfs_btree_key_addr(cur, 2, new));
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} else {
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cur->bc_ops->init_key_from_rec(
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xfs_btree_key_addr(cur, 1, new),
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xfs_btree_rec_addr(cur, 1, left));
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cur->bc_ops->init_key_from_rec(
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xfs_btree_key_addr(cur, 2, new),
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xfs_btree_rec_addr(cur, 1, right));
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/*
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* Get the keys for the left block's records and put them
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* directly in the parent block. Do the same for the right
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* block.
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*/
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cur->bc_ops->get_leaf_keys(cur, left,
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xfs_btree_key_addr(cur, 1, new));
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cur->bc_ops->get_leaf_keys(cur, right,
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xfs_btree_key_addr(cur, 2, new));
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}
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xfs_btree_log_keys(cur, nbp, 1, 2);
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@ -2858,7 +2913,7 @@ xfs_btree_make_block_unfull(
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int *index, /* new tree index */
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union xfs_btree_ptr *nptr, /* new btree ptr */
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struct xfs_btree_cur **ncur, /* new btree cursor */
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union xfs_btree_key *key, /* key of new block */
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union xfs_btree_key *key, /* key of new block */
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int *stat)
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{
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int error = 0;
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@ -3086,8 +3141,8 @@ xfs_btree_insrec(
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xfs_btree_log_block(cur, bp, XFS_BB_NUMRECS);
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/* If we inserted at the start of a block, update the parents' keys. */
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if (optr == 1) {
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error = xfs_btree_updkey(cur, key, level + 1);
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if (xfs_btree_needs_key_update(cur, optr)) {
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error = cur->bc_ops->update_keys(cur, level);
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if (error)
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goto error0;
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}
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@ -3107,7 +3162,7 @@ xfs_btree_insrec(
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*/
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*ptrp = nptr;
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if (!xfs_btree_ptr_is_null(cur, &nptr)) {
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*key = nkey;
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xfs_btree_copy_keys(cur, key, &nkey, 1);
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*curp = ncur;
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}
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@ -3386,8 +3441,6 @@ xfs_btree_delrec(
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struct xfs_buf *bp; /* buffer for block */
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int error; /* error return value */
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int i; /* loop counter */
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union xfs_btree_key key; /* storage for keyp */
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union xfs_btree_key *keyp = &key; /* passed to the next level */
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union xfs_btree_ptr lptr; /* left sibling block ptr */
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struct xfs_buf *lbp; /* left buffer pointer */
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struct xfs_btree_block *left; /* left btree block */
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@ -3458,13 +3511,6 @@ xfs_btree_delrec(
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xfs_btree_log_keys(cur, bp, ptr, numrecs - 1);
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xfs_btree_log_ptrs(cur, bp, ptr, numrecs - 1);
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}
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/*
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* If it's the first record in the block, we'll need to pass a
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* key up to the next level (updkey).
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*/
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if (ptr == 1)
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keyp = xfs_btree_key_addr(cur, 1, block);
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} else {
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/* It's a leaf. operate on records */
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if (ptr < numrecs) {
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@ -3473,16 +3519,6 @@ xfs_btree_delrec(
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-1, numrecs - ptr);
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xfs_btree_log_recs(cur, bp, ptr, numrecs - 1);
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}
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/*
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* If it's the first record in the block, we'll need a key
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* structure to pass up to the next level (updkey).
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*/
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if (ptr == 1) {
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cur->bc_ops->init_key_from_rec(&key,
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xfs_btree_rec_addr(cur, 1, block));
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keyp = &key;
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}
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}
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/*
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@ -3549,8 +3585,8 @@ xfs_btree_delrec(
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* If we deleted the leftmost entry in the block, update the
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* key values above us in the tree.
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*/
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if (ptr == 1) {
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error = xfs_btree_updkey(cur, keyp, level + 1);
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if (xfs_btree_needs_key_update(cur, ptr)) {
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error = cur->bc_ops->update_keys(cur, level);
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if (error)
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goto error0;
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}
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@ -180,6 +180,19 @@ struct xfs_btree_ops {
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union xfs_btree_rec *r1,
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union xfs_btree_rec *r2);
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#endif
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/* derive the low & high keys from the records in a leaf block */
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void (*get_leaf_keys)(struct xfs_btree_cur *cur,
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struct xfs_btree_block *block,
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union xfs_btree_key *key);
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/* derive the low & high keys from the keys in a node block */
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void (*get_node_keys)(struct xfs_btree_cur *cur,
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struct xfs_btree_block *block,
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union xfs_btree_key *key);
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/* update the parent keys of given btree level */
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int (*update_keys)(struct xfs_btree_cur *cur, int level);
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};
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/*
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@ -475,4 +488,10 @@ bool xfs_btree_sblock_verify(struct xfs_buf *bp, unsigned int max_recs);
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uint xfs_btree_compute_maxlevels(struct xfs_mount *mp, uint *limits,
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unsigned long len);
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void xfs_btree_get_leaf_keys(struct xfs_btree_cur *cur,
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struct xfs_btree_block *block, union xfs_btree_key *key);
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void xfs_btree_get_node_keys(struct xfs_btree_cur *cur,
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struct xfs_btree_block *block, union xfs_btree_key *key);
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int xfs_btree_update_keys(struct xfs_btree_cur *cur, int level);
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#endif /* __XFS_BTREE_H__ */
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@ -314,6 +314,10 @@ static const struct xfs_btree_ops xfs_inobt_ops = {
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.keys_inorder = xfs_inobt_keys_inorder,
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.recs_inorder = xfs_inobt_recs_inorder,
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#endif
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.get_leaf_keys = xfs_btree_get_leaf_keys,
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.get_node_keys = xfs_btree_get_node_keys,
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.update_keys = xfs_btree_update_keys,
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};
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static const struct xfs_btree_ops xfs_finobt_ops = {
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@ -335,6 +339,10 @@ static const struct xfs_btree_ops xfs_finobt_ops = {
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.keys_inorder = xfs_inobt_keys_inorder,
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.recs_inorder = xfs_inobt_recs_inorder,
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#endif
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|
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.get_leaf_keys = xfs_btree_get_leaf_keys,
|
||||
.get_node_keys = xfs_btree_get_node_keys,
|
||||
.update_keys = xfs_btree_update_keys,
|
||||
};
|
||||
|
||||
/*
|
||||
|
|
Загрузка…
Ссылка в новой задаче