3525 lines
90 KiB
C
3525 lines
90 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* alloc.c
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*
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* Extent allocs and frees
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*
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* Copyright (C) 2002, 2004 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#include <linux/fs.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/highmem.h>
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#define MLOG_MASK_PREFIX ML_DISK_ALLOC
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#include <cluster/masklog.h>
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#include "ocfs2.h"
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#include "alloc.h"
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#include "dlmglue.h"
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#include "extent_map.h"
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#include "inode.h"
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#include "journal.h"
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#include "localalloc.h"
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#include "suballoc.h"
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#include "sysfile.h"
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#include "file.h"
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#include "super.h"
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#include "uptodate.h"
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#include "buffer_head_io.h"
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static void ocfs2_free_truncate_context(struct ocfs2_truncate_context *tc);
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/*
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* Structures which describe a path through a btree, and functions to
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* manipulate them.
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*
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* The idea here is to be as generic as possible with the tree
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* manipulation code.
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*/
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struct ocfs2_path_item {
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struct buffer_head *bh;
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struct ocfs2_extent_list *el;
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};
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#define OCFS2_MAX_PATH_DEPTH 5
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struct ocfs2_path {
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int p_tree_depth;
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struct ocfs2_path_item p_node[OCFS2_MAX_PATH_DEPTH];
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};
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#define path_root_bh(_path) ((_path)->p_node[0].bh)
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#define path_root_el(_path) ((_path)->p_node[0].el)
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#define path_leaf_bh(_path) ((_path)->p_node[(_path)->p_tree_depth].bh)
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#define path_leaf_el(_path) ((_path)->p_node[(_path)->p_tree_depth].el)
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#define path_num_items(_path) ((_path)->p_tree_depth + 1)
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/*
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* Reset the actual path elements so that we can re-use the structure
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* to build another path. Generally, this involves freeing the buffer
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* heads.
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*/
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static void ocfs2_reinit_path(struct ocfs2_path *path, int keep_root)
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{
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int i, start = 0, depth = 0;
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struct ocfs2_path_item *node;
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if (keep_root)
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start = 1;
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for(i = start; i < path_num_items(path); i++) {
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node = &path->p_node[i];
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brelse(node->bh);
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node->bh = NULL;
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node->el = NULL;
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}
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/*
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* Tree depth may change during truncate, or insert. If we're
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* keeping the root extent list, then make sure that our path
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* structure reflects the proper depth.
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*/
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if (keep_root)
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depth = le16_to_cpu(path_root_el(path)->l_tree_depth);
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path->p_tree_depth = depth;
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}
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static void ocfs2_free_path(struct ocfs2_path *path)
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{
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if (path) {
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ocfs2_reinit_path(path, 0);
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kfree(path);
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}
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}
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/*
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* Make the *dest path the same as src and re-initialize src path to
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* have a root only.
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*/
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static void ocfs2_mv_path(struct ocfs2_path *dest, struct ocfs2_path *src)
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{
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int i;
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BUG_ON(path_root_bh(dest) != path_root_bh(src));
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for(i = 1; i < OCFS2_MAX_PATH_DEPTH; i++) {
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brelse(dest->p_node[i].bh);
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dest->p_node[i].bh = src->p_node[i].bh;
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dest->p_node[i].el = src->p_node[i].el;
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src->p_node[i].bh = NULL;
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src->p_node[i].el = NULL;
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}
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}
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/*
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* Insert an extent block at given index.
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*
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* This will not take an additional reference on eb_bh.
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*/
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static inline void ocfs2_path_insert_eb(struct ocfs2_path *path, int index,
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struct buffer_head *eb_bh)
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{
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struct ocfs2_extent_block *eb = (struct ocfs2_extent_block *)eb_bh->b_data;
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/*
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* Right now, no root bh is an extent block, so this helps
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* catch code errors with dinode trees. The assertion can be
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* safely removed if we ever need to insert extent block
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* structures at the root.
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*/
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BUG_ON(index == 0);
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path->p_node[index].bh = eb_bh;
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path->p_node[index].el = &eb->h_list;
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}
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static struct ocfs2_path *ocfs2_new_path(struct buffer_head *root_bh,
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struct ocfs2_extent_list *root_el)
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{
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struct ocfs2_path *path;
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BUG_ON(le16_to_cpu(root_el->l_tree_depth) >= OCFS2_MAX_PATH_DEPTH);
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path = kzalloc(sizeof(*path), GFP_NOFS);
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if (path) {
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path->p_tree_depth = le16_to_cpu(root_el->l_tree_depth);
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get_bh(root_bh);
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path_root_bh(path) = root_bh;
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path_root_el(path) = root_el;
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}
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return path;
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}
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/*
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* Allocate and initialize a new path based on a disk inode tree.
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*/
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static struct ocfs2_path *ocfs2_new_inode_path(struct buffer_head *di_bh)
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{
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struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
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struct ocfs2_extent_list *el = &di->id2.i_list;
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return ocfs2_new_path(di_bh, el);
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}
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/*
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* Convenience function to journal all components in a path.
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*/
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static int ocfs2_journal_access_path(struct inode *inode, handle_t *handle,
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struct ocfs2_path *path)
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{
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int i, ret = 0;
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if (!path)
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goto out;
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for(i = 0; i < path_num_items(path); i++) {
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ret = ocfs2_journal_access(handle, inode, path->p_node[i].bh,
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OCFS2_JOURNAL_ACCESS_WRITE);
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if (ret < 0) {
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mlog_errno(ret);
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goto out;
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}
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}
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out:
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return ret;
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}
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enum ocfs2_contig_type {
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CONTIG_NONE = 0,
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CONTIG_LEFT,
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CONTIG_RIGHT
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};
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static int ocfs2_block_extent_contig(struct super_block *sb,
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struct ocfs2_extent_rec *ext,
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u64 blkno)
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{
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return blkno == (le64_to_cpu(ext->e_blkno) +
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ocfs2_clusters_to_blocks(sb,
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le32_to_cpu(ext->e_clusters)));
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}
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static int ocfs2_extents_adjacent(struct ocfs2_extent_rec *left,
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struct ocfs2_extent_rec *right)
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{
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return (le32_to_cpu(left->e_cpos) + le32_to_cpu(left->e_clusters) ==
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le32_to_cpu(right->e_cpos));
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}
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static enum ocfs2_contig_type
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ocfs2_extent_contig(struct inode *inode,
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struct ocfs2_extent_rec *ext,
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struct ocfs2_extent_rec *insert_rec)
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{
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u64 blkno = le64_to_cpu(insert_rec->e_blkno);
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if (ocfs2_extents_adjacent(ext, insert_rec) &&
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ocfs2_block_extent_contig(inode->i_sb, ext, blkno))
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return CONTIG_RIGHT;
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blkno = le64_to_cpu(ext->e_blkno);
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if (ocfs2_extents_adjacent(insert_rec, ext) &&
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ocfs2_block_extent_contig(inode->i_sb, insert_rec, blkno))
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return CONTIG_LEFT;
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return CONTIG_NONE;
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}
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/*
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* NOTE: We can have pretty much any combination of contiguousness and
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* appending.
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*
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* The usefulness of APPEND_TAIL is more in that it lets us know that
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* we'll have to update the path to that leaf.
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*/
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enum ocfs2_append_type {
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APPEND_NONE = 0,
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APPEND_TAIL,
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};
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struct ocfs2_insert_type {
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enum ocfs2_append_type ins_appending;
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enum ocfs2_contig_type ins_contig;
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int ins_contig_index;
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int ins_free_records;
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int ins_tree_depth;
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};
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/*
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* How many free extents have we got before we need more meta data?
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*/
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int ocfs2_num_free_extents(struct ocfs2_super *osb,
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struct inode *inode,
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struct ocfs2_dinode *fe)
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{
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int retval;
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struct ocfs2_extent_list *el;
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struct ocfs2_extent_block *eb;
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struct buffer_head *eb_bh = NULL;
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mlog_entry_void();
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if (!OCFS2_IS_VALID_DINODE(fe)) {
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OCFS2_RO_ON_INVALID_DINODE(inode->i_sb, fe);
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retval = -EIO;
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goto bail;
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}
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if (fe->i_last_eb_blk) {
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retval = ocfs2_read_block(osb, le64_to_cpu(fe->i_last_eb_blk),
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&eb_bh, OCFS2_BH_CACHED, inode);
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if (retval < 0) {
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mlog_errno(retval);
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goto bail;
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}
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eb = (struct ocfs2_extent_block *) eb_bh->b_data;
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el = &eb->h_list;
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} else
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el = &fe->id2.i_list;
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BUG_ON(el->l_tree_depth != 0);
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retval = le16_to_cpu(el->l_count) - le16_to_cpu(el->l_next_free_rec);
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bail:
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if (eb_bh)
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brelse(eb_bh);
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mlog_exit(retval);
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return retval;
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}
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/* expects array to already be allocated
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*
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* sets h_signature, h_blkno, h_suballoc_bit, h_suballoc_slot, and
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* l_count for you
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*/
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static int ocfs2_create_new_meta_bhs(struct ocfs2_super *osb,
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handle_t *handle,
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struct inode *inode,
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int wanted,
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struct ocfs2_alloc_context *meta_ac,
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struct buffer_head *bhs[])
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{
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int count, status, i;
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u16 suballoc_bit_start;
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u32 num_got;
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u64 first_blkno;
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struct ocfs2_extent_block *eb;
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mlog_entry_void();
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count = 0;
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while (count < wanted) {
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status = ocfs2_claim_metadata(osb,
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handle,
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meta_ac,
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wanted - count,
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&suballoc_bit_start,
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&num_got,
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&first_blkno);
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if (status < 0) {
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mlog_errno(status);
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goto bail;
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}
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for(i = count; i < (num_got + count); i++) {
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bhs[i] = sb_getblk(osb->sb, first_blkno);
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if (bhs[i] == NULL) {
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status = -EIO;
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mlog_errno(status);
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goto bail;
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}
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ocfs2_set_new_buffer_uptodate(inode, bhs[i]);
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status = ocfs2_journal_access(handle, inode, bhs[i],
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OCFS2_JOURNAL_ACCESS_CREATE);
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if (status < 0) {
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mlog_errno(status);
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goto bail;
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}
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memset(bhs[i]->b_data, 0, osb->sb->s_blocksize);
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eb = (struct ocfs2_extent_block *) bhs[i]->b_data;
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/* Ok, setup the minimal stuff here. */
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strcpy(eb->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE);
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eb->h_blkno = cpu_to_le64(first_blkno);
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eb->h_fs_generation = cpu_to_le32(osb->fs_generation);
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|
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#ifndef OCFS2_USE_ALL_METADATA_SUBALLOCATORS
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/* we always use slot zero's suballocator */
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eb->h_suballoc_slot = 0;
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#else
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eb->h_suballoc_slot = cpu_to_le16(osb->slot_num);
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#endif
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eb->h_suballoc_bit = cpu_to_le16(suballoc_bit_start);
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eb->h_list.l_count =
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cpu_to_le16(ocfs2_extent_recs_per_eb(osb->sb));
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|
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suballoc_bit_start++;
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first_blkno++;
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|
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/* We'll also be dirtied by the caller, so
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* this isn't absolutely necessary. */
|
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status = ocfs2_journal_dirty(handle, bhs[i]);
|
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if (status < 0) {
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mlog_errno(status);
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goto bail;
|
|
}
|
|
}
|
|
|
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count += num_got;
|
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}
|
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|
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status = 0;
|
|
bail:
|
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if (status < 0) {
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for(i = 0; i < wanted; i++) {
|
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if (bhs[i])
|
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brelse(bhs[i]);
|
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bhs[i] = NULL;
|
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}
|
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}
|
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mlog_exit(status);
|
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return status;
|
|
}
|
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|
|
/*
|
|
* Helper function for ocfs2_add_branch() and ocfs2_shift_tree_depth().
|
|
*
|
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* Returns the sum of the rightmost extent rec logical offset and
|
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* cluster count.
|
|
*
|
|
* ocfs2_add_branch() uses this to determine what logical cluster
|
|
* value should be populated into the leftmost new branch records.
|
|
*
|
|
* ocfs2_shift_tree_depth() uses this to determine the # clusters
|
|
* value for the new topmost tree record.
|
|
*/
|
|
static inline u32 ocfs2_sum_rightmost_rec(struct ocfs2_extent_list *el)
|
|
{
|
|
int i;
|
|
|
|
i = le16_to_cpu(el->l_next_free_rec) - 1;
|
|
|
|
return le32_to_cpu(el->l_recs[i].e_cpos) +
|
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le32_to_cpu(el->l_recs[i].e_clusters);
|
|
}
|
|
|
|
/*
|
|
* Add an entire tree branch to our inode. eb_bh is the extent block
|
|
* to start at, if we don't want to start the branch at the dinode
|
|
* structure.
|
|
*
|
|
* last_eb_bh is required as we have to update it's next_leaf pointer
|
|
* for the new last extent block.
|
|
*
|
|
* the new branch will be 'empty' in the sense that every block will
|
|
* contain a single record with e_clusters == 0.
|
|
*/
|
|
static int ocfs2_add_branch(struct ocfs2_super *osb,
|
|
handle_t *handle,
|
|
struct inode *inode,
|
|
struct buffer_head *fe_bh,
|
|
struct buffer_head *eb_bh,
|
|
struct buffer_head *last_eb_bh,
|
|
struct ocfs2_alloc_context *meta_ac)
|
|
{
|
|
int status, new_blocks, i;
|
|
u64 next_blkno, new_last_eb_blk;
|
|
struct buffer_head *bh;
|
|
struct buffer_head **new_eb_bhs = NULL;
|
|
struct ocfs2_dinode *fe;
|
|
struct ocfs2_extent_block *eb;
|
|
struct ocfs2_extent_list *eb_el;
|
|
struct ocfs2_extent_list *el;
|
|
u32 new_cpos;
|
|
|
|
mlog_entry_void();
|
|
|
|
BUG_ON(!last_eb_bh);
|
|
|
|
fe = (struct ocfs2_dinode *) fe_bh->b_data;
|
|
|
|
if (eb_bh) {
|
|
eb = (struct ocfs2_extent_block *) eb_bh->b_data;
|
|
el = &eb->h_list;
|
|
} else
|
|
el = &fe->id2.i_list;
|
|
|
|
/* we never add a branch to a leaf. */
|
|
BUG_ON(!el->l_tree_depth);
|
|
|
|
new_blocks = le16_to_cpu(el->l_tree_depth);
|
|
|
|
/* allocate the number of new eb blocks we need */
|
|
new_eb_bhs = kcalloc(new_blocks, sizeof(struct buffer_head *),
|
|
GFP_KERNEL);
|
|
if (!new_eb_bhs) {
|
|
status = -ENOMEM;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
status = ocfs2_create_new_meta_bhs(osb, handle, inode, new_blocks,
|
|
meta_ac, new_eb_bhs);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
eb = (struct ocfs2_extent_block *)last_eb_bh->b_data;
|
|
new_cpos = ocfs2_sum_rightmost_rec(&eb->h_list);
|
|
|
|
/* Note: new_eb_bhs[new_blocks - 1] is the guy which will be
|
|
* linked with the rest of the tree.
|
|
* conversly, new_eb_bhs[0] is the new bottommost leaf.
|
|
*
|
|
* when we leave the loop, new_last_eb_blk will point to the
|
|
* newest leaf, and next_blkno will point to the topmost extent
|
|
* block. */
|
|
next_blkno = new_last_eb_blk = 0;
|
|
for(i = 0; i < new_blocks; i++) {
|
|
bh = new_eb_bhs[i];
|
|
eb = (struct ocfs2_extent_block *) bh->b_data;
|
|
if (!OCFS2_IS_VALID_EXTENT_BLOCK(eb)) {
|
|
OCFS2_RO_ON_INVALID_EXTENT_BLOCK(inode->i_sb, eb);
|
|
status = -EIO;
|
|
goto bail;
|
|
}
|
|
eb_el = &eb->h_list;
|
|
|
|
status = ocfs2_journal_access(handle, inode, bh,
|
|
OCFS2_JOURNAL_ACCESS_CREATE);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
eb->h_next_leaf_blk = 0;
|
|
eb_el->l_tree_depth = cpu_to_le16(i);
|
|
eb_el->l_next_free_rec = cpu_to_le16(1);
|
|
/*
|
|
* This actually counts as an empty extent as
|
|
* c_clusters == 0
|
|
*/
|
|
eb_el->l_recs[0].e_cpos = cpu_to_le32(new_cpos);
|
|
eb_el->l_recs[0].e_blkno = cpu_to_le64(next_blkno);
|
|
eb_el->l_recs[0].e_clusters = cpu_to_le32(0);
|
|
if (!eb_el->l_tree_depth)
|
|
new_last_eb_blk = le64_to_cpu(eb->h_blkno);
|
|
|
|
status = ocfs2_journal_dirty(handle, bh);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
next_blkno = le64_to_cpu(eb->h_blkno);
|
|
}
|
|
|
|
/* This is a bit hairy. We want to update up to three blocks
|
|
* here without leaving any of them in an inconsistent state
|
|
* in case of error. We don't have to worry about
|
|
* journal_dirty erroring as it won't unless we've aborted the
|
|
* handle (in which case we would never be here) so reserving
|
|
* the write with journal_access is all we need to do. */
|
|
status = ocfs2_journal_access(handle, inode, last_eb_bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
status = ocfs2_journal_access(handle, inode, fe_bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
if (eb_bh) {
|
|
status = ocfs2_journal_access(handle, inode, eb_bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
/* Link the new branch into the rest of the tree (el will
|
|
* either be on the fe, or the extent block passed in. */
|
|
i = le16_to_cpu(el->l_next_free_rec);
|
|
el->l_recs[i].e_blkno = cpu_to_le64(next_blkno);
|
|
el->l_recs[i].e_cpos = cpu_to_le32(new_cpos);
|
|
el->l_recs[i].e_clusters = 0;
|
|
le16_add_cpu(&el->l_next_free_rec, 1);
|
|
|
|
/* fe needs a new last extent block pointer, as does the
|
|
* next_leaf on the previously last-extent-block. */
|
|
fe->i_last_eb_blk = cpu_to_le64(new_last_eb_blk);
|
|
|
|
eb = (struct ocfs2_extent_block *) last_eb_bh->b_data;
|
|
eb->h_next_leaf_blk = cpu_to_le64(new_last_eb_blk);
|
|
|
|
status = ocfs2_journal_dirty(handle, last_eb_bh);
|
|
if (status < 0)
|
|
mlog_errno(status);
|
|
status = ocfs2_journal_dirty(handle, fe_bh);
|
|
if (status < 0)
|
|
mlog_errno(status);
|
|
if (eb_bh) {
|
|
status = ocfs2_journal_dirty(handle, eb_bh);
|
|
if (status < 0)
|
|
mlog_errno(status);
|
|
}
|
|
|
|
status = 0;
|
|
bail:
|
|
if (new_eb_bhs) {
|
|
for (i = 0; i < new_blocks; i++)
|
|
if (new_eb_bhs[i])
|
|
brelse(new_eb_bhs[i]);
|
|
kfree(new_eb_bhs);
|
|
}
|
|
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* adds another level to the allocation tree.
|
|
* returns back the new extent block so you can add a branch to it
|
|
* after this call.
|
|
*/
|
|
static int ocfs2_shift_tree_depth(struct ocfs2_super *osb,
|
|
handle_t *handle,
|
|
struct inode *inode,
|
|
struct buffer_head *fe_bh,
|
|
struct ocfs2_alloc_context *meta_ac,
|
|
struct buffer_head **ret_new_eb_bh)
|
|
{
|
|
int status, i;
|
|
u32 new_clusters;
|
|
struct buffer_head *new_eb_bh = NULL;
|
|
struct ocfs2_dinode *fe;
|
|
struct ocfs2_extent_block *eb;
|
|
struct ocfs2_extent_list *fe_el;
|
|
struct ocfs2_extent_list *eb_el;
|
|
|
|
mlog_entry_void();
|
|
|
|
status = ocfs2_create_new_meta_bhs(osb, handle, inode, 1, meta_ac,
|
|
&new_eb_bh);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
eb = (struct ocfs2_extent_block *) new_eb_bh->b_data;
|
|
if (!OCFS2_IS_VALID_EXTENT_BLOCK(eb)) {
|
|
OCFS2_RO_ON_INVALID_EXTENT_BLOCK(inode->i_sb, eb);
|
|
status = -EIO;
|
|
goto bail;
|
|
}
|
|
|
|
eb_el = &eb->h_list;
|
|
fe = (struct ocfs2_dinode *) fe_bh->b_data;
|
|
fe_el = &fe->id2.i_list;
|
|
|
|
status = ocfs2_journal_access(handle, inode, new_eb_bh,
|
|
OCFS2_JOURNAL_ACCESS_CREATE);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
/* copy the fe data into the new extent block */
|
|
eb_el->l_tree_depth = fe_el->l_tree_depth;
|
|
eb_el->l_next_free_rec = fe_el->l_next_free_rec;
|
|
for(i = 0; i < le16_to_cpu(fe_el->l_next_free_rec); i++) {
|
|
eb_el->l_recs[i].e_cpos = fe_el->l_recs[i].e_cpos;
|
|
eb_el->l_recs[i].e_clusters = fe_el->l_recs[i].e_clusters;
|
|
eb_el->l_recs[i].e_blkno = fe_el->l_recs[i].e_blkno;
|
|
}
|
|
|
|
status = ocfs2_journal_dirty(handle, new_eb_bh);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
status = ocfs2_journal_access(handle, inode, fe_bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
new_clusters = ocfs2_sum_rightmost_rec(eb_el);
|
|
|
|
/* update fe now */
|
|
le16_add_cpu(&fe_el->l_tree_depth, 1);
|
|
fe_el->l_recs[0].e_cpos = 0;
|
|
fe_el->l_recs[0].e_blkno = eb->h_blkno;
|
|
fe_el->l_recs[0].e_clusters = cpu_to_le32(new_clusters);
|
|
for(i = 1; i < le16_to_cpu(fe_el->l_next_free_rec); i++) {
|
|
fe_el->l_recs[i].e_cpos = 0;
|
|
fe_el->l_recs[i].e_clusters = 0;
|
|
fe_el->l_recs[i].e_blkno = 0;
|
|
}
|
|
fe_el->l_next_free_rec = cpu_to_le16(1);
|
|
|
|
/* If this is our 1st tree depth shift, then last_eb_blk
|
|
* becomes the allocated extent block */
|
|
if (fe_el->l_tree_depth == cpu_to_le16(1))
|
|
fe->i_last_eb_blk = eb->h_blkno;
|
|
|
|
status = ocfs2_journal_dirty(handle, fe_bh);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
*ret_new_eb_bh = new_eb_bh;
|
|
new_eb_bh = NULL;
|
|
status = 0;
|
|
bail:
|
|
if (new_eb_bh)
|
|
brelse(new_eb_bh);
|
|
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Should only be called when there is no space left in any of the
|
|
* leaf nodes. What we want to do is find the lowest tree depth
|
|
* non-leaf extent block with room for new records. There are three
|
|
* valid results of this search:
|
|
*
|
|
* 1) a lowest extent block is found, then we pass it back in
|
|
* *lowest_eb_bh and return '0'
|
|
*
|
|
* 2) the search fails to find anything, but the dinode has room. We
|
|
* pass NULL back in *lowest_eb_bh, but still return '0'
|
|
*
|
|
* 3) the search fails to find anything AND the dinode is full, in
|
|
* which case we return > 0
|
|
*
|
|
* return status < 0 indicates an error.
|
|
*/
|
|
static int ocfs2_find_branch_target(struct ocfs2_super *osb,
|
|
struct inode *inode,
|
|
struct buffer_head *fe_bh,
|
|
struct buffer_head **target_bh)
|
|
{
|
|
int status = 0, i;
|
|
u64 blkno;
|
|
struct ocfs2_dinode *fe;
|
|
struct ocfs2_extent_block *eb;
|
|
struct ocfs2_extent_list *el;
|
|
struct buffer_head *bh = NULL;
|
|
struct buffer_head *lowest_bh = NULL;
|
|
|
|
mlog_entry_void();
|
|
|
|
*target_bh = NULL;
|
|
|
|
fe = (struct ocfs2_dinode *) fe_bh->b_data;
|
|
el = &fe->id2.i_list;
|
|
|
|
while(le16_to_cpu(el->l_tree_depth) > 1) {
|
|
if (le16_to_cpu(el->l_next_free_rec) == 0) {
|
|
ocfs2_error(inode->i_sb, "Dinode %llu has empty "
|
|
"extent list (next_free_rec == 0)",
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno);
|
|
status = -EIO;
|
|
goto bail;
|
|
}
|
|
i = le16_to_cpu(el->l_next_free_rec) - 1;
|
|
blkno = le64_to_cpu(el->l_recs[i].e_blkno);
|
|
if (!blkno) {
|
|
ocfs2_error(inode->i_sb, "Dinode %llu has extent "
|
|
"list where extent # %d has no physical "
|
|
"block start",
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno, i);
|
|
status = -EIO;
|
|
goto bail;
|
|
}
|
|
|
|
if (bh) {
|
|
brelse(bh);
|
|
bh = NULL;
|
|
}
|
|
|
|
status = ocfs2_read_block(osb, blkno, &bh, OCFS2_BH_CACHED,
|
|
inode);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
eb = (struct ocfs2_extent_block *) bh->b_data;
|
|
if (!OCFS2_IS_VALID_EXTENT_BLOCK(eb)) {
|
|
OCFS2_RO_ON_INVALID_EXTENT_BLOCK(inode->i_sb, eb);
|
|
status = -EIO;
|
|
goto bail;
|
|
}
|
|
el = &eb->h_list;
|
|
|
|
if (le16_to_cpu(el->l_next_free_rec) <
|
|
le16_to_cpu(el->l_count)) {
|
|
if (lowest_bh)
|
|
brelse(lowest_bh);
|
|
lowest_bh = bh;
|
|
get_bh(lowest_bh);
|
|
}
|
|
}
|
|
|
|
/* If we didn't find one and the fe doesn't have any room,
|
|
* then return '1' */
|
|
if (!lowest_bh
|
|
&& (fe->id2.i_list.l_next_free_rec == fe->id2.i_list.l_count))
|
|
status = 1;
|
|
|
|
*target_bh = lowest_bh;
|
|
bail:
|
|
if (bh)
|
|
brelse(bh);
|
|
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
static inline int ocfs2_is_empty_extent(struct ocfs2_extent_rec *rec)
|
|
{
|
|
return !rec->e_clusters;
|
|
}
|
|
|
|
/*
|
|
* This function will discard the rightmost extent record.
|
|
*/
|
|
static void ocfs2_shift_records_right(struct ocfs2_extent_list *el)
|
|
{
|
|
int next_free = le16_to_cpu(el->l_next_free_rec);
|
|
int count = le16_to_cpu(el->l_count);
|
|
unsigned int num_bytes;
|
|
|
|
BUG_ON(!next_free);
|
|
/* This will cause us to go off the end of our extent list. */
|
|
BUG_ON(next_free >= count);
|
|
|
|
num_bytes = sizeof(struct ocfs2_extent_rec) * next_free;
|
|
|
|
memmove(&el->l_recs[1], &el->l_recs[0], num_bytes);
|
|
}
|
|
|
|
static void ocfs2_rotate_leaf(struct ocfs2_extent_list *el,
|
|
struct ocfs2_extent_rec *insert_rec)
|
|
{
|
|
int i, insert_index, next_free, has_empty, num_bytes;
|
|
u32 insert_cpos = le32_to_cpu(insert_rec->e_cpos);
|
|
struct ocfs2_extent_rec *rec;
|
|
|
|
next_free = le16_to_cpu(el->l_next_free_rec);
|
|
has_empty = ocfs2_is_empty_extent(&el->l_recs[0]);
|
|
|
|
BUG_ON(!next_free);
|
|
|
|
/* The tree code before us didn't allow enough room in the leaf. */
|
|
if (el->l_next_free_rec == el->l_count && !has_empty)
|
|
BUG();
|
|
|
|
/*
|
|
* The easiest way to approach this is to just remove the
|
|
* empty extent and temporarily decrement next_free.
|
|
*/
|
|
if (has_empty) {
|
|
/*
|
|
* If next_free was 1 (only an empty extent), this
|
|
* loop won't execute, which is fine. We still want
|
|
* the decrement above to happen.
|
|
*/
|
|
for(i = 0; i < (next_free - 1); i++)
|
|
el->l_recs[i] = el->l_recs[i+1];
|
|
|
|
next_free--;
|
|
}
|
|
|
|
/*
|
|
* Figure out what the new record index should be.
|
|
*/
|
|
for(i = 0; i < next_free; i++) {
|
|
rec = &el->l_recs[i];
|
|
|
|
if (insert_cpos < le32_to_cpu(rec->e_cpos))
|
|
break;
|
|
}
|
|
insert_index = i;
|
|
|
|
mlog(0, "ins %u: index %d, has_empty %d, next_free %d, count %d\n",
|
|
insert_cpos, insert_index, has_empty, next_free, le16_to_cpu(el->l_count));
|
|
|
|
BUG_ON(insert_index < 0);
|
|
BUG_ON(insert_index >= le16_to_cpu(el->l_count));
|
|
BUG_ON(insert_index > next_free);
|
|
|
|
/*
|
|
* No need to memmove if we're just adding to the tail.
|
|
*/
|
|
if (insert_index != next_free) {
|
|
BUG_ON(next_free >= le16_to_cpu(el->l_count));
|
|
|
|
num_bytes = next_free - insert_index;
|
|
num_bytes *= sizeof(struct ocfs2_extent_rec);
|
|
memmove(&el->l_recs[insert_index + 1],
|
|
&el->l_recs[insert_index],
|
|
num_bytes);
|
|
}
|
|
|
|
/*
|
|
* Either we had an empty extent, and need to re-increment or
|
|
* there was no empty extent on a non full rightmost leaf node,
|
|
* in which case we still need to increment.
|
|
*/
|
|
next_free++;
|
|
el->l_next_free_rec = cpu_to_le16(next_free);
|
|
/*
|
|
* Make sure none of the math above just messed up our tree.
|
|
*/
|
|
BUG_ON(le16_to_cpu(el->l_next_free_rec) > le16_to_cpu(el->l_count));
|
|
|
|
el->l_recs[insert_index] = *insert_rec;
|
|
|
|
}
|
|
|
|
/*
|
|
* Create an empty extent record .
|
|
*
|
|
* l_next_free_rec may be updated.
|
|
*
|
|
* If an empty extent already exists do nothing.
|
|
*/
|
|
static void ocfs2_create_empty_extent(struct ocfs2_extent_list *el)
|
|
{
|
|
int next_free = le16_to_cpu(el->l_next_free_rec);
|
|
|
|
if (next_free == 0)
|
|
goto set_and_inc;
|
|
|
|
if (ocfs2_is_empty_extent(&el->l_recs[0]))
|
|
return;
|
|
|
|
mlog_bug_on_msg(el->l_count == el->l_next_free_rec,
|
|
"Asked to create an empty extent in a full list:\n"
|
|
"count = %u, tree depth = %u",
|
|
le16_to_cpu(el->l_count),
|
|
le16_to_cpu(el->l_tree_depth));
|
|
|
|
ocfs2_shift_records_right(el);
|
|
|
|
set_and_inc:
|
|
le16_add_cpu(&el->l_next_free_rec, 1);
|
|
memset(&el->l_recs[0], 0, sizeof(struct ocfs2_extent_rec));
|
|
}
|
|
|
|
/*
|
|
* For a rotation which involves two leaf nodes, the "root node" is
|
|
* the lowest level tree node which contains a path to both leafs. This
|
|
* resulting set of information can be used to form a complete "subtree"
|
|
*
|
|
* This function is passed two full paths from the dinode down to a
|
|
* pair of adjacent leaves. It's task is to figure out which path
|
|
* index contains the subtree root - this can be the root index itself
|
|
* in a worst-case rotation.
|
|
*
|
|
* The array index of the subtree root is passed back.
|
|
*/
|
|
static int ocfs2_find_subtree_root(struct inode *inode,
|
|
struct ocfs2_path *left,
|
|
struct ocfs2_path *right)
|
|
{
|
|
int i = 0;
|
|
|
|
/*
|
|
* Check that the caller passed in two paths from the same tree.
|
|
*/
|
|
BUG_ON(path_root_bh(left) != path_root_bh(right));
|
|
|
|
do {
|
|
i++;
|
|
|
|
/*
|
|
* The caller didn't pass two adjacent paths.
|
|
*/
|
|
mlog_bug_on_msg(i > left->p_tree_depth,
|
|
"Inode %lu, left depth %u, right depth %u\n"
|
|
"left leaf blk %llu, right leaf blk %llu\n",
|
|
inode->i_ino, left->p_tree_depth,
|
|
right->p_tree_depth,
|
|
(unsigned long long)path_leaf_bh(left)->b_blocknr,
|
|
(unsigned long long)path_leaf_bh(right)->b_blocknr);
|
|
} while (left->p_node[i].bh->b_blocknr ==
|
|
right->p_node[i].bh->b_blocknr);
|
|
|
|
return i - 1;
|
|
}
|
|
|
|
typedef void (path_insert_t)(void *, struct buffer_head *);
|
|
|
|
/*
|
|
* Traverse a btree path in search of cpos, starting at root_el.
|
|
*
|
|
* This code can be called with a cpos larger than the tree, in which
|
|
* case it will return the rightmost path.
|
|
*/
|
|
static int __ocfs2_find_path(struct inode *inode,
|
|
struct ocfs2_extent_list *root_el, u32 cpos,
|
|
path_insert_t *func, void *data)
|
|
{
|
|
int i, ret = 0;
|
|
u32 range;
|
|
u64 blkno;
|
|
struct buffer_head *bh = NULL;
|
|
struct ocfs2_extent_block *eb;
|
|
struct ocfs2_extent_list *el;
|
|
struct ocfs2_extent_rec *rec;
|
|
struct ocfs2_inode_info *oi = OCFS2_I(inode);
|
|
|
|
el = root_el;
|
|
while (el->l_tree_depth) {
|
|
if (le16_to_cpu(el->l_next_free_rec) == 0) {
|
|
ocfs2_error(inode->i_sb,
|
|
"Inode %llu has empty extent list at "
|
|
"depth %u\n",
|
|
(unsigned long long)oi->ip_blkno,
|
|
le16_to_cpu(el->l_tree_depth));
|
|
ret = -EROFS;
|
|
goto out;
|
|
|
|
}
|
|
|
|
for(i = 0; i < le16_to_cpu(el->l_next_free_rec) - 1; i++) {
|
|
rec = &el->l_recs[i];
|
|
|
|
/*
|
|
* In the case that cpos is off the allocation
|
|
* tree, this should just wind up returning the
|
|
* rightmost record.
|
|
*/
|
|
range = le32_to_cpu(rec->e_cpos) +
|
|
le32_to_cpu(rec->e_clusters);
|
|
if (cpos >= le32_to_cpu(rec->e_cpos) && cpos < range)
|
|
break;
|
|
}
|
|
|
|
blkno = le64_to_cpu(el->l_recs[i].e_blkno);
|
|
if (blkno == 0) {
|
|
ocfs2_error(inode->i_sb,
|
|
"Inode %llu has bad blkno in extent list "
|
|
"at depth %u (index %d)\n",
|
|
(unsigned long long)oi->ip_blkno,
|
|
le16_to_cpu(el->l_tree_depth), i);
|
|
ret = -EROFS;
|
|
goto out;
|
|
}
|
|
|
|
brelse(bh);
|
|
bh = NULL;
|
|
ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), blkno,
|
|
&bh, OCFS2_BH_CACHED, inode);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
eb = (struct ocfs2_extent_block *) bh->b_data;
|
|
el = &eb->h_list;
|
|
if (!OCFS2_IS_VALID_EXTENT_BLOCK(eb)) {
|
|
OCFS2_RO_ON_INVALID_EXTENT_BLOCK(inode->i_sb, eb);
|
|
ret = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
if (le16_to_cpu(el->l_next_free_rec) >
|
|
le16_to_cpu(el->l_count)) {
|
|
ocfs2_error(inode->i_sb,
|
|
"Inode %llu has bad count in extent list "
|
|
"at block %llu (next free=%u, count=%u)\n",
|
|
(unsigned long long)oi->ip_blkno,
|
|
(unsigned long long)bh->b_blocknr,
|
|
le16_to_cpu(el->l_next_free_rec),
|
|
le16_to_cpu(el->l_count));
|
|
ret = -EROFS;
|
|
goto out;
|
|
}
|
|
|
|
if (func)
|
|
func(data, bh);
|
|
}
|
|
|
|
out:
|
|
/*
|
|
* Catch any trailing bh that the loop didn't handle.
|
|
*/
|
|
brelse(bh);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Given an initialized path (that is, it has a valid root extent
|
|
* list), this function will traverse the btree in search of the path
|
|
* which would contain cpos.
|
|
*
|
|
* The path traveled is recorded in the path structure.
|
|
*
|
|
* Note that this will not do any comparisons on leaf node extent
|
|
* records, so it will work fine in the case that we just added a tree
|
|
* branch.
|
|
*/
|
|
struct find_path_data {
|
|
int index;
|
|
struct ocfs2_path *path;
|
|
};
|
|
static void find_path_ins(void *data, struct buffer_head *bh)
|
|
{
|
|
struct find_path_data *fp = data;
|
|
|
|
get_bh(bh);
|
|
ocfs2_path_insert_eb(fp->path, fp->index, bh);
|
|
fp->index++;
|
|
}
|
|
static int ocfs2_find_path(struct inode *inode, struct ocfs2_path *path,
|
|
u32 cpos)
|
|
{
|
|
struct find_path_data data;
|
|
|
|
data.index = 1;
|
|
data.path = path;
|
|
return __ocfs2_find_path(inode, path_root_el(path), cpos,
|
|
find_path_ins, &data);
|
|
}
|
|
|
|
static void find_leaf_ins(void *data, struct buffer_head *bh)
|
|
{
|
|
struct ocfs2_extent_block *eb =(struct ocfs2_extent_block *)bh->b_data;
|
|
struct ocfs2_extent_list *el = &eb->h_list;
|
|
struct buffer_head **ret = data;
|
|
|
|
/* We want to retain only the leaf block. */
|
|
if (le16_to_cpu(el->l_tree_depth) == 0) {
|
|
get_bh(bh);
|
|
*ret = bh;
|
|
}
|
|
}
|
|
/*
|
|
* Find the leaf block in the tree which would contain cpos. No
|
|
* checking of the actual leaf is done.
|
|
*
|
|
* Some paths want to call this instead of allocating a path structure
|
|
* and calling ocfs2_find_path().
|
|
*
|
|
* This function doesn't handle non btree extent lists.
|
|
*/
|
|
int ocfs2_find_leaf(struct inode *inode, struct ocfs2_extent_list *root_el,
|
|
u32 cpos, struct buffer_head **leaf_bh)
|
|
{
|
|
int ret;
|
|
struct buffer_head *bh = NULL;
|
|
|
|
ret = __ocfs2_find_path(inode, root_el, cpos, find_leaf_ins, &bh);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
*leaf_bh = bh;
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Adjust the adjacent records (left_rec, right_rec) involved in a rotation.
|
|
*
|
|
* Basically, we've moved stuff around at the bottom of the tree and
|
|
* we need to fix up the extent records above the changes to reflect
|
|
* the new changes.
|
|
*
|
|
* left_rec: the record on the left.
|
|
* left_child_el: is the child list pointed to by left_rec
|
|
* right_rec: the record to the right of left_rec
|
|
* right_child_el: is the child list pointed to by right_rec
|
|
*
|
|
* By definition, this only works on interior nodes.
|
|
*/
|
|
static void ocfs2_adjust_adjacent_records(struct ocfs2_extent_rec *left_rec,
|
|
struct ocfs2_extent_list *left_child_el,
|
|
struct ocfs2_extent_rec *right_rec,
|
|
struct ocfs2_extent_list *right_child_el)
|
|
{
|
|
u32 left_clusters, right_end;
|
|
|
|
/*
|
|
* Interior nodes never have holes. Their cpos is the cpos of
|
|
* the leftmost record in their child list. Their cluster
|
|
* count covers the full theoretical range of their child list
|
|
* - the range between their cpos and the cpos of the record
|
|
* immediately to their right.
|
|
*/
|
|
left_clusters = le32_to_cpu(right_child_el->l_recs[0].e_cpos);
|
|
left_clusters -= le32_to_cpu(left_rec->e_cpos);
|
|
left_rec->e_clusters = cpu_to_le32(left_clusters);
|
|
|
|
/*
|
|
* Calculate the rightmost cluster count boundary before
|
|
* moving cpos - we will need to adjust e_clusters after
|
|
* updating e_cpos to keep the same highest cluster count.
|
|
*/
|
|
right_end = le32_to_cpu(right_rec->e_cpos);
|
|
right_end += le32_to_cpu(right_rec->e_clusters);
|
|
|
|
right_rec->e_cpos = left_rec->e_cpos;
|
|
le32_add_cpu(&right_rec->e_cpos, left_clusters);
|
|
|
|
right_end -= le32_to_cpu(right_rec->e_cpos);
|
|
right_rec->e_clusters = cpu_to_le32(right_end);
|
|
}
|
|
|
|
/*
|
|
* Adjust the adjacent root node records involved in a
|
|
* rotation. left_el_blkno is passed in as a key so that we can easily
|
|
* find it's index in the root list.
|
|
*/
|
|
static void ocfs2_adjust_root_records(struct ocfs2_extent_list *root_el,
|
|
struct ocfs2_extent_list *left_el,
|
|
struct ocfs2_extent_list *right_el,
|
|
u64 left_el_blkno)
|
|
{
|
|
int i;
|
|
|
|
BUG_ON(le16_to_cpu(root_el->l_tree_depth) <=
|
|
le16_to_cpu(left_el->l_tree_depth));
|
|
|
|
for(i = 0; i < le16_to_cpu(root_el->l_next_free_rec) - 1; i++) {
|
|
if (le64_to_cpu(root_el->l_recs[i].e_blkno) == left_el_blkno)
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* The path walking code should have never returned a root and
|
|
* two paths which are not adjacent.
|
|
*/
|
|
BUG_ON(i >= (le16_to_cpu(root_el->l_next_free_rec) - 1));
|
|
|
|
ocfs2_adjust_adjacent_records(&root_el->l_recs[i], left_el,
|
|
&root_el->l_recs[i + 1], right_el);
|
|
}
|
|
|
|
/*
|
|
* We've changed a leaf block (in right_path) and need to reflect that
|
|
* change back up the subtree.
|
|
*
|
|
* This happens in multiple places:
|
|
* - When we've moved an extent record from the left path leaf to the right
|
|
* path leaf to make room for an empty extent in the left path leaf.
|
|
* - When our insert into the right path leaf is at the leftmost edge
|
|
* and requires an update of the path immediately to it's left. This
|
|
* can occur at the end of some types of rotation and appending inserts.
|
|
*/
|
|
static void ocfs2_complete_edge_insert(struct inode *inode, handle_t *handle,
|
|
struct ocfs2_path *left_path,
|
|
struct ocfs2_path *right_path,
|
|
int subtree_index)
|
|
{
|
|
int ret, i, idx;
|
|
struct ocfs2_extent_list *el, *left_el, *right_el;
|
|
struct ocfs2_extent_rec *left_rec, *right_rec;
|
|
struct buffer_head *root_bh = left_path->p_node[subtree_index].bh;
|
|
|
|
/*
|
|
* Update the counts and position values within all the
|
|
* interior nodes to reflect the leaf rotation we just did.
|
|
*
|
|
* The root node is handled below the loop.
|
|
*
|
|
* We begin the loop with right_el and left_el pointing to the
|
|
* leaf lists and work our way up.
|
|
*
|
|
* NOTE: within this loop, left_el and right_el always refer
|
|
* to the *child* lists.
|
|
*/
|
|
left_el = path_leaf_el(left_path);
|
|
right_el = path_leaf_el(right_path);
|
|
for(i = left_path->p_tree_depth - 1; i > subtree_index; i--) {
|
|
mlog(0, "Adjust records at index %u\n", i);
|
|
|
|
/*
|
|
* One nice property of knowing that all of these
|
|
* nodes are below the root is that we only deal with
|
|
* the leftmost right node record and the rightmost
|
|
* left node record.
|
|
*/
|
|
el = left_path->p_node[i].el;
|
|
idx = le16_to_cpu(left_el->l_next_free_rec) - 1;
|
|
left_rec = &el->l_recs[idx];
|
|
|
|
el = right_path->p_node[i].el;
|
|
right_rec = &el->l_recs[0];
|
|
|
|
ocfs2_adjust_adjacent_records(left_rec, left_el, right_rec,
|
|
right_el);
|
|
|
|
ret = ocfs2_journal_dirty(handle, left_path->p_node[i].bh);
|
|
if (ret)
|
|
mlog_errno(ret);
|
|
|
|
ret = ocfs2_journal_dirty(handle, right_path->p_node[i].bh);
|
|
if (ret)
|
|
mlog_errno(ret);
|
|
|
|
/*
|
|
* Setup our list pointers now so that the current
|
|
* parents become children in the next iteration.
|
|
*/
|
|
left_el = left_path->p_node[i].el;
|
|
right_el = right_path->p_node[i].el;
|
|
}
|
|
|
|
/*
|
|
* At the root node, adjust the two adjacent records which
|
|
* begin our path to the leaves.
|
|
*/
|
|
|
|
el = left_path->p_node[subtree_index].el;
|
|
left_el = left_path->p_node[subtree_index + 1].el;
|
|
right_el = right_path->p_node[subtree_index + 1].el;
|
|
|
|
ocfs2_adjust_root_records(el, left_el, right_el,
|
|
left_path->p_node[subtree_index + 1].bh->b_blocknr);
|
|
|
|
root_bh = left_path->p_node[subtree_index].bh;
|
|
|
|
ret = ocfs2_journal_dirty(handle, root_bh);
|
|
if (ret)
|
|
mlog_errno(ret);
|
|
}
|
|
|
|
static int ocfs2_rotate_subtree_right(struct inode *inode,
|
|
handle_t *handle,
|
|
struct ocfs2_path *left_path,
|
|
struct ocfs2_path *right_path,
|
|
int subtree_index)
|
|
{
|
|
int ret, i;
|
|
struct buffer_head *right_leaf_bh;
|
|
struct buffer_head *left_leaf_bh = NULL;
|
|
struct buffer_head *root_bh;
|
|
struct ocfs2_extent_list *right_el, *left_el;
|
|
struct ocfs2_extent_rec move_rec;
|
|
|
|
left_leaf_bh = path_leaf_bh(left_path);
|
|
left_el = path_leaf_el(left_path);
|
|
|
|
if (left_el->l_next_free_rec != left_el->l_count) {
|
|
ocfs2_error(inode->i_sb,
|
|
"Inode %llu has non-full interior leaf node %llu"
|
|
"(next free = %u)",
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno,
|
|
(unsigned long long)left_leaf_bh->b_blocknr,
|
|
le16_to_cpu(left_el->l_next_free_rec));
|
|
return -EROFS;
|
|
}
|
|
|
|
/*
|
|
* This extent block may already have an empty record, so we
|
|
* return early if so.
|
|
*/
|
|
if (ocfs2_is_empty_extent(&left_el->l_recs[0]))
|
|
return 0;
|
|
|
|
root_bh = left_path->p_node[subtree_index].bh;
|
|
BUG_ON(root_bh != right_path->p_node[subtree_index].bh);
|
|
|
|
ret = ocfs2_journal_access(handle, inode, root_bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
for(i = subtree_index + 1; i < path_num_items(right_path); i++) {
|
|
ret = ocfs2_journal_access(handle, inode,
|
|
right_path->p_node[i].bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = ocfs2_journal_access(handle, inode,
|
|
left_path->p_node[i].bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
right_leaf_bh = path_leaf_bh(right_path);
|
|
right_el = path_leaf_el(right_path);
|
|
|
|
/* This is a code error, not a disk corruption. */
|
|
mlog_bug_on_msg(!right_el->l_next_free_rec, "Inode %llu: Rotate fails "
|
|
"because rightmost leaf block %llu is empty\n",
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno,
|
|
(unsigned long long)right_leaf_bh->b_blocknr);
|
|
|
|
ocfs2_create_empty_extent(right_el);
|
|
|
|
ret = ocfs2_journal_dirty(handle, right_leaf_bh);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
/* Do the copy now. */
|
|
i = le16_to_cpu(left_el->l_next_free_rec) - 1;
|
|
move_rec = left_el->l_recs[i];
|
|
right_el->l_recs[0] = move_rec;
|
|
|
|
/*
|
|
* Clear out the record we just copied and shift everything
|
|
* over, leaving an empty extent in the left leaf.
|
|
*
|
|
* We temporarily subtract from next_free_rec so that the
|
|
* shift will lose the tail record (which is now defunct).
|
|
*/
|
|
le16_add_cpu(&left_el->l_next_free_rec, -1);
|
|
ocfs2_shift_records_right(left_el);
|
|
memset(&left_el->l_recs[0], 0, sizeof(struct ocfs2_extent_rec));
|
|
le16_add_cpu(&left_el->l_next_free_rec, 1);
|
|
|
|
ret = ocfs2_journal_dirty(handle, left_leaf_bh);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ocfs2_complete_edge_insert(inode, handle, left_path, right_path,
|
|
subtree_index);
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Given a full path, determine what cpos value would return us a path
|
|
* containing the leaf immediately to the left of the current one.
|
|
*
|
|
* Will return zero if the path passed in is already the leftmost path.
|
|
*/
|
|
static int ocfs2_find_cpos_for_left_leaf(struct super_block *sb,
|
|
struct ocfs2_path *path, u32 *cpos)
|
|
{
|
|
int i, j, ret = 0;
|
|
u64 blkno;
|
|
struct ocfs2_extent_list *el;
|
|
|
|
*cpos = 0;
|
|
|
|
blkno = path_leaf_bh(path)->b_blocknr;
|
|
|
|
/* Start at the tree node just above the leaf and work our way up. */
|
|
i = path->p_tree_depth - 1;
|
|
while (i >= 0) {
|
|
el = path->p_node[i].el;
|
|
|
|
/*
|
|
* Find the extent record just before the one in our
|
|
* path.
|
|
*/
|
|
for(j = 0; j < le16_to_cpu(el->l_next_free_rec); j++) {
|
|
if (le64_to_cpu(el->l_recs[j].e_blkno) == blkno) {
|
|
if (j == 0) {
|
|
if (i == 0) {
|
|
/*
|
|
* We've determined that the
|
|
* path specified is already
|
|
* the leftmost one - return a
|
|
* cpos of zero.
|
|
*/
|
|
goto out;
|
|
}
|
|
/*
|
|
* The leftmost record points to our
|
|
* leaf - we need to travel up the
|
|
* tree one level.
|
|
*/
|
|
goto next_node;
|
|
}
|
|
|
|
*cpos = le32_to_cpu(el->l_recs[j - 1].e_cpos);
|
|
*cpos = *cpos + le32_to_cpu(el->l_recs[j - 1].e_clusters) - 1;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If we got here, we never found a valid node where
|
|
* the tree indicated one should be.
|
|
*/
|
|
ocfs2_error(sb,
|
|
"Invalid extent tree at extent block %llu\n",
|
|
(unsigned long long)blkno);
|
|
ret = -EROFS;
|
|
goto out;
|
|
|
|
next_node:
|
|
blkno = path->p_node[i].bh->b_blocknr;
|
|
i--;
|
|
}
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int ocfs2_extend_rotate_transaction(handle_t *handle, int subtree_depth,
|
|
struct ocfs2_path *path)
|
|
{
|
|
int credits = (path->p_tree_depth - subtree_depth) * 2 + 1;
|
|
|
|
if (handle->h_buffer_credits < credits)
|
|
return ocfs2_extend_trans(handle, credits);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Trap the case where we're inserting into the theoretical range past
|
|
* the _actual_ left leaf range. Otherwise, we'll rotate a record
|
|
* whose cpos is less than ours into the right leaf.
|
|
*
|
|
* It's only necessary to look at the rightmost record of the left
|
|
* leaf because the logic that calls us should ensure that the
|
|
* theoretical ranges in the path components above the leaves are
|
|
* correct.
|
|
*/
|
|
static int ocfs2_rotate_requires_path_adjustment(struct ocfs2_path *left_path,
|
|
u32 insert_cpos)
|
|
{
|
|
struct ocfs2_extent_list *left_el;
|
|
struct ocfs2_extent_rec *rec;
|
|
int next_free;
|
|
|
|
left_el = path_leaf_el(left_path);
|
|
next_free = le16_to_cpu(left_el->l_next_free_rec);
|
|
rec = &left_el->l_recs[next_free - 1];
|
|
|
|
if (insert_cpos > le32_to_cpu(rec->e_cpos))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Rotate all the records in a btree right one record, starting at insert_cpos.
|
|
*
|
|
* The path to the rightmost leaf should be passed in.
|
|
*
|
|
* The array is assumed to be large enough to hold an entire path (tree depth).
|
|
*
|
|
* Upon succesful return from this function:
|
|
*
|
|
* - The 'right_path' array will contain a path to the leaf block
|
|
* whose range contains e_cpos.
|
|
* - That leaf block will have a single empty extent in list index 0.
|
|
* - In the case that the rotation requires a post-insert update,
|
|
* *ret_left_path will contain a valid path which can be passed to
|
|
* ocfs2_insert_path().
|
|
*/
|
|
static int ocfs2_rotate_tree_right(struct inode *inode,
|
|
handle_t *handle,
|
|
u32 insert_cpos,
|
|
struct ocfs2_path *right_path,
|
|
struct ocfs2_path **ret_left_path)
|
|
{
|
|
int ret, start;
|
|
u32 cpos;
|
|
struct ocfs2_path *left_path = NULL;
|
|
|
|
*ret_left_path = NULL;
|
|
|
|
left_path = ocfs2_new_path(path_root_bh(right_path),
|
|
path_root_el(right_path));
|
|
if (!left_path) {
|
|
ret = -ENOMEM;
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb, right_path, &cpos);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
mlog(0, "Insert: %u, first left path cpos: %u\n", insert_cpos, cpos);
|
|
|
|
/*
|
|
* What we want to do here is:
|
|
*
|
|
* 1) Start with the rightmost path.
|
|
*
|
|
* 2) Determine a path to the leaf block directly to the left
|
|
* of that leaf.
|
|
*
|
|
* 3) Determine the 'subtree root' - the lowest level tree node
|
|
* which contains a path to both leaves.
|
|
*
|
|
* 4) Rotate the subtree.
|
|
*
|
|
* 5) Find the next subtree by considering the left path to be
|
|
* the new right path.
|
|
*
|
|
* The check at the top of this while loop also accepts
|
|
* insert_cpos == cpos because cpos is only a _theoretical_
|
|
* value to get us the left path - insert_cpos might very well
|
|
* be filling that hole.
|
|
*
|
|
* Stop at a cpos of '0' because we either started at the
|
|
* leftmost branch (i.e., a tree with one branch and a
|
|
* rotation inside of it), or we've gone as far as we can in
|
|
* rotating subtrees.
|
|
*/
|
|
while (cpos && insert_cpos <= cpos) {
|
|
mlog(0, "Rotating a tree: ins. cpos: %u, left path cpos: %u\n",
|
|
insert_cpos, cpos);
|
|
|
|
ret = ocfs2_find_path(inode, left_path, cpos);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
mlog_bug_on_msg(path_leaf_bh(left_path) ==
|
|
path_leaf_bh(right_path),
|
|
"Inode %lu: error during insert of %u "
|
|
"(left path cpos %u) results in two identical "
|
|
"paths ending at %llu\n",
|
|
inode->i_ino, insert_cpos, cpos,
|
|
(unsigned long long)
|
|
path_leaf_bh(left_path)->b_blocknr);
|
|
|
|
if (ocfs2_rotate_requires_path_adjustment(left_path,
|
|
insert_cpos)) {
|
|
mlog(0, "Path adjustment required\n");
|
|
|
|
/*
|
|
* We've rotated the tree as much as we
|
|
* should. The rest is up to
|
|
* ocfs2_insert_path() to complete, after the
|
|
* record insertion. We indicate this
|
|
* situation by returning the left path.
|
|
*
|
|
* The reason we don't adjust the records here
|
|
* before the record insert is that an error
|
|
* later might break the rule where a parent
|
|
* record e_cpos will reflect the actual
|
|
* e_cpos of the 1st nonempty record of the
|
|
* child list.
|
|
*/
|
|
*ret_left_path = left_path;
|
|
goto out_ret_path;
|
|
}
|
|
|
|
start = ocfs2_find_subtree_root(inode, left_path, right_path);
|
|
|
|
mlog(0, "Subtree root at index %d (blk %llu, depth %d)\n",
|
|
start,
|
|
(unsigned long long) right_path->p_node[start].bh->b_blocknr,
|
|
right_path->p_tree_depth);
|
|
|
|
ret = ocfs2_extend_rotate_transaction(handle, start,
|
|
right_path);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = ocfs2_rotate_subtree_right(inode, handle, left_path,
|
|
right_path, start);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* There is no need to re-read the next right path
|
|
* as we know that it'll be our current left
|
|
* path. Optimize by copying values instead.
|
|
*/
|
|
ocfs2_mv_path(right_path, left_path);
|
|
|
|
ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb, right_path,
|
|
&cpos);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
out:
|
|
ocfs2_free_path(left_path);
|
|
|
|
out_ret_path:
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Do the final bits of extent record insertion at the target leaf
|
|
* list. If this leaf is part of an allocation tree, it is assumed
|
|
* that the tree above has been prepared.
|
|
*/
|
|
static void ocfs2_insert_at_leaf(struct ocfs2_extent_rec *insert_rec,
|
|
struct ocfs2_extent_list *el,
|
|
struct ocfs2_insert_type *insert,
|
|
struct inode *inode)
|
|
{
|
|
int i = insert->ins_contig_index;
|
|
unsigned int range;
|
|
struct ocfs2_extent_rec *rec;
|
|
|
|
BUG_ON(el->l_tree_depth);
|
|
|
|
/*
|
|
* Contiguous insert - either left or right.
|
|
*/
|
|
if (insert->ins_contig != CONTIG_NONE) {
|
|
rec = &el->l_recs[i];
|
|
if (insert->ins_contig == CONTIG_LEFT) {
|
|
rec->e_blkno = insert_rec->e_blkno;
|
|
rec->e_cpos = insert_rec->e_cpos;
|
|
}
|
|
le32_add_cpu(&rec->e_clusters,
|
|
le32_to_cpu(insert_rec->e_clusters));
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Handle insert into an empty leaf.
|
|
*/
|
|
if (le16_to_cpu(el->l_next_free_rec) == 0 ||
|
|
((le16_to_cpu(el->l_next_free_rec) == 1) &&
|
|
ocfs2_is_empty_extent(&el->l_recs[0]))) {
|
|
el->l_recs[0] = *insert_rec;
|
|
el->l_next_free_rec = cpu_to_le16(1);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Appending insert.
|
|
*/
|
|
if (insert->ins_appending == APPEND_TAIL) {
|
|
i = le16_to_cpu(el->l_next_free_rec) - 1;
|
|
rec = &el->l_recs[i];
|
|
range = le32_to_cpu(rec->e_cpos) + le32_to_cpu(rec->e_clusters);
|
|
BUG_ON(le32_to_cpu(insert_rec->e_cpos) < range);
|
|
|
|
mlog_bug_on_msg(le16_to_cpu(el->l_next_free_rec) >=
|
|
le16_to_cpu(el->l_count),
|
|
"inode %lu, depth %u, count %u, next free %u, "
|
|
"rec.cpos %u, rec.clusters %u, "
|
|
"insert.cpos %u, insert.clusters %u\n",
|
|
inode->i_ino,
|
|
le16_to_cpu(el->l_tree_depth),
|
|
le16_to_cpu(el->l_count),
|
|
le16_to_cpu(el->l_next_free_rec),
|
|
le32_to_cpu(el->l_recs[i].e_cpos),
|
|
le32_to_cpu(el->l_recs[i].e_clusters),
|
|
le32_to_cpu(insert_rec->e_cpos),
|
|
le32_to_cpu(insert_rec->e_clusters));
|
|
i++;
|
|
el->l_recs[i] = *insert_rec;
|
|
le16_add_cpu(&el->l_next_free_rec, 1);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Ok, we have to rotate.
|
|
*
|
|
* At this point, it is safe to assume that inserting into an
|
|
* empty leaf and appending to a leaf have both been handled
|
|
* above.
|
|
*
|
|
* This leaf needs to have space, either by the empty 1st
|
|
* extent record, or by virtue of an l_next_rec < l_count.
|
|
*/
|
|
ocfs2_rotate_leaf(el, insert_rec);
|
|
}
|
|
|
|
static inline void ocfs2_update_dinode_clusters(struct inode *inode,
|
|
struct ocfs2_dinode *di,
|
|
u32 clusters)
|
|
{
|
|
le32_add_cpu(&di->i_clusters, clusters);
|
|
spin_lock(&OCFS2_I(inode)->ip_lock);
|
|
OCFS2_I(inode)->ip_clusters = le32_to_cpu(di->i_clusters);
|
|
spin_unlock(&OCFS2_I(inode)->ip_lock);
|
|
}
|
|
|
|
static int ocfs2_append_rec_to_path(struct inode *inode, handle_t *handle,
|
|
struct ocfs2_extent_rec *insert_rec,
|
|
struct ocfs2_path *right_path,
|
|
struct ocfs2_path **ret_left_path)
|
|
{
|
|
int ret, i, next_free;
|
|
struct buffer_head *bh;
|
|
struct ocfs2_extent_list *el;
|
|
struct ocfs2_path *left_path = NULL;
|
|
|
|
*ret_left_path = NULL;
|
|
|
|
/*
|
|
* If our appending insert is at the leftmost edge of a leaf,
|
|
* then we might need to update the rightmost records of the
|
|
* neighboring path.
|
|
*/
|
|
el = path_leaf_el(right_path);
|
|
next_free = le16_to_cpu(el->l_next_free_rec);
|
|
if (next_free == 0 ||
|
|
(next_free == 1 && ocfs2_is_empty_extent(&el->l_recs[0]))) {
|
|
u32 left_cpos;
|
|
|
|
ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb, right_path,
|
|
&left_cpos);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
mlog(0, "Append may need a left path update. cpos: %u, "
|
|
"left_cpos: %u\n", le32_to_cpu(insert_rec->e_cpos),
|
|
left_cpos);
|
|
|
|
/*
|
|
* No need to worry if the append is already in the
|
|
* leftmost leaf.
|
|
*/
|
|
if (left_cpos) {
|
|
left_path = ocfs2_new_path(path_root_bh(right_path),
|
|
path_root_el(right_path));
|
|
if (!left_path) {
|
|
ret = -ENOMEM;
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = ocfs2_find_path(inode, left_path, left_cpos);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* ocfs2_insert_path() will pass the left_path to the
|
|
* journal for us.
|
|
*/
|
|
}
|
|
}
|
|
|
|
ret = ocfs2_journal_access_path(inode, handle, right_path);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
el = path_root_el(right_path);
|
|
bh = path_root_bh(right_path);
|
|
i = 0;
|
|
while (1) {
|
|
next_free = le16_to_cpu(el->l_next_free_rec);
|
|
if (next_free == 0) {
|
|
ocfs2_error(inode->i_sb,
|
|
"Dinode %llu has a bad extent list",
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno);
|
|
ret = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
el->l_recs[next_free - 1].e_clusters = insert_rec->e_cpos;
|
|
le32_add_cpu(&el->l_recs[next_free - 1].e_clusters,
|
|
le32_to_cpu(insert_rec->e_clusters));
|
|
le32_add_cpu(&el->l_recs[next_free - 1].e_clusters,
|
|
-le32_to_cpu(el->l_recs[next_free - 1].e_cpos));
|
|
|
|
ret = ocfs2_journal_dirty(handle, bh);
|
|
if (ret)
|
|
mlog_errno(ret);
|
|
|
|
if (++i >= right_path->p_tree_depth)
|
|
break;
|
|
|
|
bh = right_path->p_node[i].bh;
|
|
el = right_path->p_node[i].el;
|
|
}
|
|
|
|
*ret_left_path = left_path;
|
|
ret = 0;
|
|
out:
|
|
if (ret != 0)
|
|
ocfs2_free_path(left_path);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* This function only does inserts on an allocation b-tree. For dinode
|
|
* lists, ocfs2_insert_at_leaf() is called directly.
|
|
*
|
|
* right_path is the path we want to do the actual insert
|
|
* in. left_path should only be passed in if we need to update that
|
|
* portion of the tree after an edge insert.
|
|
*/
|
|
static int ocfs2_insert_path(struct inode *inode,
|
|
handle_t *handle,
|
|
struct ocfs2_path *left_path,
|
|
struct ocfs2_path *right_path,
|
|
struct ocfs2_extent_rec *insert_rec,
|
|
struct ocfs2_insert_type *insert)
|
|
{
|
|
int ret, subtree_index;
|
|
struct buffer_head *leaf_bh = path_leaf_bh(right_path);
|
|
struct ocfs2_extent_list *el;
|
|
|
|
/*
|
|
* Pass both paths to the journal. The majority of inserts
|
|
* will be touching all components anyway.
|
|
*/
|
|
ret = ocfs2_journal_access_path(inode, handle, right_path);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
if (left_path) {
|
|
int credits = handle->h_buffer_credits;
|
|
|
|
/*
|
|
* There's a chance that left_path got passed back to
|
|
* us without being accounted for in the
|
|
* journal. Extend our transaction here to be sure we
|
|
* can change those blocks.
|
|
*/
|
|
credits += left_path->p_tree_depth;
|
|
|
|
ret = ocfs2_extend_trans(handle, credits);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = ocfs2_journal_access_path(inode, handle, left_path);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
el = path_leaf_el(right_path);
|
|
|
|
ocfs2_insert_at_leaf(insert_rec, el, insert, inode);
|
|
ret = ocfs2_journal_dirty(handle, leaf_bh);
|
|
if (ret)
|
|
mlog_errno(ret);
|
|
|
|
if (left_path) {
|
|
/*
|
|
* The rotate code has indicated that we need to fix
|
|
* up portions of the tree after the insert.
|
|
*
|
|
* XXX: Should we extend the transaction here?
|
|
*/
|
|
subtree_index = ocfs2_find_subtree_root(inode, left_path,
|
|
right_path);
|
|
ocfs2_complete_edge_insert(inode, handle, left_path,
|
|
right_path, subtree_index);
|
|
}
|
|
|
|
ret = 0;
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int ocfs2_do_insert_extent(struct inode *inode,
|
|
handle_t *handle,
|
|
struct buffer_head *di_bh,
|
|
struct ocfs2_extent_rec *insert_rec,
|
|
struct ocfs2_insert_type *type)
|
|
{
|
|
int ret, rotate = 0;
|
|
u32 cpos;
|
|
struct ocfs2_path *right_path = NULL;
|
|
struct ocfs2_path *left_path = NULL;
|
|
struct ocfs2_dinode *di;
|
|
struct ocfs2_extent_list *el;
|
|
|
|
di = (struct ocfs2_dinode *) di_bh->b_data;
|
|
el = &di->id2.i_list;
|
|
|
|
ret = ocfs2_journal_access(handle, inode, di_bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
if (le16_to_cpu(el->l_tree_depth) == 0) {
|
|
ocfs2_insert_at_leaf(insert_rec, el, type, inode);
|
|
goto out_update_clusters;
|
|
}
|
|
|
|
right_path = ocfs2_new_inode_path(di_bh);
|
|
if (!right_path) {
|
|
ret = -ENOMEM;
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Determine the path to start with. Rotations need the
|
|
* rightmost path, everything else can go directly to the
|
|
* target leaf.
|
|
*/
|
|
cpos = le32_to_cpu(insert_rec->e_cpos);
|
|
if (type->ins_appending == APPEND_NONE &&
|
|
type->ins_contig == CONTIG_NONE) {
|
|
rotate = 1;
|
|
cpos = UINT_MAX;
|
|
}
|
|
|
|
ret = ocfs2_find_path(inode, right_path, cpos);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Rotations and appends need special treatment - they modify
|
|
* parts of the tree's above them.
|
|
*
|
|
* Both might pass back a path immediate to the left of the
|
|
* one being inserted to. This will be cause
|
|
* ocfs2_insert_path() to modify the rightmost records of
|
|
* left_path to account for an edge insert.
|
|
*
|
|
* XXX: When modifying this code, keep in mind that an insert
|
|
* can wind up skipping both of these two special cases...
|
|
*/
|
|
if (rotate) {
|
|
ret = ocfs2_rotate_tree_right(inode, handle,
|
|
le32_to_cpu(insert_rec->e_cpos),
|
|
right_path, &left_path);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
} else if (type->ins_appending == APPEND_TAIL
|
|
&& type->ins_contig != CONTIG_LEFT) {
|
|
ret = ocfs2_append_rec_to_path(inode, handle, insert_rec,
|
|
right_path, &left_path);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
ret = ocfs2_insert_path(inode, handle, left_path, right_path,
|
|
insert_rec, type);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
out_update_clusters:
|
|
ocfs2_update_dinode_clusters(inode, di,
|
|
le32_to_cpu(insert_rec->e_clusters));
|
|
|
|
ret = ocfs2_journal_dirty(handle, di_bh);
|
|
if (ret)
|
|
mlog_errno(ret);
|
|
|
|
out:
|
|
ocfs2_free_path(left_path);
|
|
ocfs2_free_path(right_path);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void ocfs2_figure_contig_type(struct inode *inode,
|
|
struct ocfs2_insert_type *insert,
|
|
struct ocfs2_extent_list *el,
|
|
struct ocfs2_extent_rec *insert_rec)
|
|
{
|
|
int i;
|
|
enum ocfs2_contig_type contig_type = CONTIG_NONE;
|
|
|
|
for(i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) {
|
|
contig_type = ocfs2_extent_contig(inode, &el->l_recs[i],
|
|
insert_rec);
|
|
if (contig_type != CONTIG_NONE) {
|
|
insert->ins_contig_index = i;
|
|
break;
|
|
}
|
|
}
|
|
insert->ins_contig = contig_type;
|
|
}
|
|
|
|
/*
|
|
* This should only be called against the righmost leaf extent list.
|
|
*
|
|
* ocfs2_figure_appending_type() will figure out whether we'll have to
|
|
* insert at the tail of the rightmost leaf.
|
|
*
|
|
* This should also work against the dinode list for tree's with 0
|
|
* depth. If we consider the dinode list to be the rightmost leaf node
|
|
* then the logic here makes sense.
|
|
*/
|
|
static void ocfs2_figure_appending_type(struct ocfs2_insert_type *insert,
|
|
struct ocfs2_extent_list *el,
|
|
struct ocfs2_extent_rec *insert_rec)
|
|
{
|
|
int i;
|
|
u32 cpos = le32_to_cpu(insert_rec->e_cpos);
|
|
struct ocfs2_extent_rec *rec;
|
|
|
|
insert->ins_appending = APPEND_NONE;
|
|
|
|
BUG_ON(el->l_tree_depth);
|
|
|
|
if (!el->l_next_free_rec)
|
|
goto set_tail_append;
|
|
|
|
if (ocfs2_is_empty_extent(&el->l_recs[0])) {
|
|
/* Were all records empty? */
|
|
if (le16_to_cpu(el->l_next_free_rec) == 1)
|
|
goto set_tail_append;
|
|
}
|
|
|
|
i = le16_to_cpu(el->l_next_free_rec) - 1;
|
|
rec = &el->l_recs[i];
|
|
|
|
if (cpos >= (le32_to_cpu(rec->e_cpos) + le32_to_cpu(rec->e_clusters)))
|
|
goto set_tail_append;
|
|
|
|
return;
|
|
|
|
set_tail_append:
|
|
insert->ins_appending = APPEND_TAIL;
|
|
}
|
|
|
|
/*
|
|
* Helper function called at the begining of an insert.
|
|
*
|
|
* This computes a few things that are commonly used in the process of
|
|
* inserting into the btree:
|
|
* - Whether the new extent is contiguous with an existing one.
|
|
* - The current tree depth.
|
|
* - Whether the insert is an appending one.
|
|
* - The total # of free records in the tree.
|
|
*
|
|
* All of the information is stored on the ocfs2_insert_type
|
|
* structure.
|
|
*/
|
|
static int ocfs2_figure_insert_type(struct inode *inode,
|
|
struct buffer_head *di_bh,
|
|
struct buffer_head **last_eb_bh,
|
|
struct ocfs2_extent_rec *insert_rec,
|
|
struct ocfs2_insert_type *insert)
|
|
{
|
|
int ret;
|
|
struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
|
|
struct ocfs2_extent_block *eb;
|
|
struct ocfs2_extent_list *el;
|
|
struct ocfs2_path *path = NULL;
|
|
struct buffer_head *bh = NULL;
|
|
|
|
el = &di->id2.i_list;
|
|
insert->ins_tree_depth = le16_to_cpu(el->l_tree_depth);
|
|
|
|
if (el->l_tree_depth) {
|
|
/*
|
|
* If we have tree depth, we read in the
|
|
* rightmost extent block ahead of time as
|
|
* ocfs2_figure_insert_type() and ocfs2_add_branch()
|
|
* may want it later.
|
|
*/
|
|
ret = ocfs2_read_block(OCFS2_SB(inode->i_sb),
|
|
le64_to_cpu(di->i_last_eb_blk), &bh,
|
|
OCFS2_BH_CACHED, inode);
|
|
if (ret) {
|
|
mlog_exit(ret);
|
|
goto out;
|
|
}
|
|
eb = (struct ocfs2_extent_block *) bh->b_data;
|
|
el = &eb->h_list;
|
|
}
|
|
|
|
/*
|
|
* Unless we have a contiguous insert, we'll need to know if
|
|
* there is room left in our allocation tree for another
|
|
* extent record.
|
|
*
|
|
* XXX: This test is simplistic, we can search for empty
|
|
* extent records too.
|
|
*/
|
|
insert->ins_free_records = le16_to_cpu(el->l_count) -
|
|
le16_to_cpu(el->l_next_free_rec);
|
|
|
|
if (!insert->ins_tree_depth) {
|
|
ocfs2_figure_contig_type(inode, insert, el, insert_rec);
|
|
ocfs2_figure_appending_type(insert, el, insert_rec);
|
|
return 0;
|
|
}
|
|
|
|
path = ocfs2_new_inode_path(di_bh);
|
|
if (!path) {
|
|
ret = -ENOMEM;
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* In the case that we're inserting past what the tree
|
|
* currently accounts for, ocfs2_find_path() will return for
|
|
* us the rightmost tree path. This is accounted for below in
|
|
* the appending code.
|
|
*/
|
|
ret = ocfs2_find_path(inode, path, le32_to_cpu(insert_rec->e_cpos));
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
el = path_leaf_el(path);
|
|
|
|
/*
|
|
* Now that we have the path, there's two things we want to determine:
|
|
* 1) Contiguousness (also set contig_index if this is so)
|
|
*
|
|
* 2) Are we doing an append? We can trivially break this up
|
|
* into two types of appends: simple record append, or a
|
|
* rotate inside the tail leaf.
|
|
*/
|
|
ocfs2_figure_contig_type(inode, insert, el, insert_rec);
|
|
|
|
/*
|
|
* The insert code isn't quite ready to deal with all cases of
|
|
* left contiguousness. Specifically, if it's an insert into
|
|
* the 1st record in a leaf, it will require the adjustment of
|
|
* e_clusters on the last record of the path directly to it's
|
|
* left. For now, just catch that case and fool the layers
|
|
* above us. This works just fine for tree_depth == 0, which
|
|
* is why we allow that above.
|
|
*/
|
|
if (insert->ins_contig == CONTIG_LEFT &&
|
|
insert->ins_contig_index == 0)
|
|
insert->ins_contig = CONTIG_NONE;
|
|
|
|
/*
|
|
* Ok, so we can simply compare against last_eb to figure out
|
|
* whether the path doesn't exist. This will only happen in
|
|
* the case that we're doing a tail append, so maybe we can
|
|
* take advantage of that information somehow.
|
|
*/
|
|
if (le64_to_cpu(di->i_last_eb_blk) == path_leaf_bh(path)->b_blocknr) {
|
|
/*
|
|
* Ok, ocfs2_find_path() returned us the rightmost
|
|
* tree path. This might be an appending insert. There are
|
|
* two cases:
|
|
* 1) We're doing a true append at the tail:
|
|
* -This might even be off the end of the leaf
|
|
* 2) We're "appending" by rotating in the tail
|
|
*/
|
|
ocfs2_figure_appending_type(insert, el, insert_rec);
|
|
}
|
|
|
|
out:
|
|
ocfs2_free_path(path);
|
|
|
|
if (ret == 0)
|
|
*last_eb_bh = bh;
|
|
else
|
|
brelse(bh);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Insert an extent into an inode btree.
|
|
*
|
|
* The caller needs to update fe->i_clusters
|
|
*/
|
|
int ocfs2_insert_extent(struct ocfs2_super *osb,
|
|
handle_t *handle,
|
|
struct inode *inode,
|
|
struct buffer_head *fe_bh,
|
|
u32 cpos,
|
|
u64 start_blk,
|
|
u32 new_clusters,
|
|
struct ocfs2_alloc_context *meta_ac)
|
|
{
|
|
int status, shift;
|
|
struct buffer_head *last_eb_bh = NULL;
|
|
struct buffer_head *bh = NULL;
|
|
struct ocfs2_insert_type insert = {0, };
|
|
struct ocfs2_extent_rec rec;
|
|
|
|
mlog(0, "add %u clusters at position %u to inode %llu\n",
|
|
new_clusters, cpos, (unsigned long long)OCFS2_I(inode)->ip_blkno);
|
|
|
|
mlog_bug_on_msg(!ocfs2_sparse_alloc(osb) &&
|
|
(OCFS2_I(inode)->ip_clusters != cpos),
|
|
"Device %s, asking for sparse allocation: inode %llu, "
|
|
"cpos %u, clusters %u\n",
|
|
osb->dev_str,
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno, cpos,
|
|
OCFS2_I(inode)->ip_clusters);
|
|
|
|
rec.e_cpos = cpu_to_le32(cpos);
|
|
rec.e_blkno = cpu_to_le64(start_blk);
|
|
rec.e_clusters = cpu_to_le32(new_clusters);
|
|
|
|
status = ocfs2_figure_insert_type(inode, fe_bh, &last_eb_bh, &rec,
|
|
&insert);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
mlog(0, "Insert.appending: %u, Insert.Contig: %u, "
|
|
"Insert.contig_index: %d, Insert.free_records: %d, "
|
|
"Insert.tree_depth: %d\n",
|
|
insert.ins_appending, insert.ins_contig, insert.ins_contig_index,
|
|
insert.ins_free_records, insert.ins_tree_depth);
|
|
|
|
/*
|
|
* Avoid growing the tree unless we're out of records and the
|
|
* insert type requres one.
|
|
*/
|
|
if (insert.ins_contig != CONTIG_NONE || insert.ins_free_records)
|
|
goto out_add;
|
|
|
|
shift = ocfs2_find_branch_target(osb, inode, fe_bh, &bh);
|
|
if (shift < 0) {
|
|
status = shift;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
/* We traveled all the way to the bottom of the allocation tree
|
|
* and didn't find room for any more extents - we need to add
|
|
* another tree level */
|
|
if (shift) {
|
|
BUG_ON(bh);
|
|
mlog(0, "need to shift tree depth "
|
|
"(current = %d)\n", insert.ins_tree_depth);
|
|
|
|
/* ocfs2_shift_tree_depth will return us a buffer with
|
|
* the new extent block (so we can pass that to
|
|
* ocfs2_add_branch). */
|
|
status = ocfs2_shift_tree_depth(osb, handle, inode, fe_bh,
|
|
meta_ac, &bh);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
insert.ins_tree_depth++;
|
|
/* Special case: we have room now if we shifted from
|
|
* tree_depth 0 */
|
|
if (insert.ins_tree_depth == 1)
|
|
goto out_add;
|
|
}
|
|
|
|
/* call ocfs2_add_branch to add the final part of the tree with
|
|
* the new data. */
|
|
mlog(0, "add branch. bh = %p\n", bh);
|
|
status = ocfs2_add_branch(osb, handle, inode, fe_bh, bh, last_eb_bh,
|
|
meta_ac);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
out_add:
|
|
/* Finally, we can add clusters. This might rotate the tree for us. */
|
|
status = ocfs2_do_insert_extent(inode, handle, fe_bh, &rec, &insert);
|
|
if (status < 0)
|
|
mlog_errno(status);
|
|
|
|
bail:
|
|
if (bh)
|
|
brelse(bh);
|
|
|
|
if (last_eb_bh)
|
|
brelse(last_eb_bh);
|
|
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
static inline int ocfs2_truncate_log_needs_flush(struct ocfs2_super *osb)
|
|
{
|
|
struct buffer_head *tl_bh = osb->osb_tl_bh;
|
|
struct ocfs2_dinode *di;
|
|
struct ocfs2_truncate_log *tl;
|
|
|
|
di = (struct ocfs2_dinode *) tl_bh->b_data;
|
|
tl = &di->id2.i_dealloc;
|
|
|
|
mlog_bug_on_msg(le16_to_cpu(tl->tl_used) > le16_to_cpu(tl->tl_count),
|
|
"slot %d, invalid truncate log parameters: used = "
|
|
"%u, count = %u\n", osb->slot_num,
|
|
le16_to_cpu(tl->tl_used), le16_to_cpu(tl->tl_count));
|
|
return le16_to_cpu(tl->tl_used) == le16_to_cpu(tl->tl_count);
|
|
}
|
|
|
|
static int ocfs2_truncate_log_can_coalesce(struct ocfs2_truncate_log *tl,
|
|
unsigned int new_start)
|
|
{
|
|
unsigned int tail_index;
|
|
unsigned int current_tail;
|
|
|
|
/* No records, nothing to coalesce */
|
|
if (!le16_to_cpu(tl->tl_used))
|
|
return 0;
|
|
|
|
tail_index = le16_to_cpu(tl->tl_used) - 1;
|
|
current_tail = le32_to_cpu(tl->tl_recs[tail_index].t_start);
|
|
current_tail += le32_to_cpu(tl->tl_recs[tail_index].t_clusters);
|
|
|
|
return current_tail == new_start;
|
|
}
|
|
|
|
static int ocfs2_truncate_log_append(struct ocfs2_super *osb,
|
|
handle_t *handle,
|
|
u64 start_blk,
|
|
unsigned int num_clusters)
|
|
{
|
|
int status, index;
|
|
unsigned int start_cluster, tl_count;
|
|
struct inode *tl_inode = osb->osb_tl_inode;
|
|
struct buffer_head *tl_bh = osb->osb_tl_bh;
|
|
struct ocfs2_dinode *di;
|
|
struct ocfs2_truncate_log *tl;
|
|
|
|
mlog_entry("start_blk = %llu, num_clusters = %u\n",
|
|
(unsigned long long)start_blk, num_clusters);
|
|
|
|
BUG_ON(mutex_trylock(&tl_inode->i_mutex));
|
|
|
|
start_cluster = ocfs2_blocks_to_clusters(osb->sb, start_blk);
|
|
|
|
di = (struct ocfs2_dinode *) tl_bh->b_data;
|
|
tl = &di->id2.i_dealloc;
|
|
if (!OCFS2_IS_VALID_DINODE(di)) {
|
|
OCFS2_RO_ON_INVALID_DINODE(osb->sb, di);
|
|
status = -EIO;
|
|
goto bail;
|
|
}
|
|
|
|
tl_count = le16_to_cpu(tl->tl_count);
|
|
mlog_bug_on_msg(tl_count > ocfs2_truncate_recs_per_inode(osb->sb) ||
|
|
tl_count == 0,
|
|
"Truncate record count on #%llu invalid "
|
|
"wanted %u, actual %u\n",
|
|
(unsigned long long)OCFS2_I(tl_inode)->ip_blkno,
|
|
ocfs2_truncate_recs_per_inode(osb->sb),
|
|
le16_to_cpu(tl->tl_count));
|
|
|
|
/* Caller should have known to flush before calling us. */
|
|
index = le16_to_cpu(tl->tl_used);
|
|
if (index >= tl_count) {
|
|
status = -ENOSPC;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
status = ocfs2_journal_access(handle, tl_inode, tl_bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
mlog(0, "Log truncate of %u clusters starting at cluster %u to "
|
|
"%llu (index = %d)\n", num_clusters, start_cluster,
|
|
(unsigned long long)OCFS2_I(tl_inode)->ip_blkno, index);
|
|
|
|
if (ocfs2_truncate_log_can_coalesce(tl, start_cluster)) {
|
|
/*
|
|
* Move index back to the record we are coalescing with.
|
|
* ocfs2_truncate_log_can_coalesce() guarantees nonzero
|
|
*/
|
|
index--;
|
|
|
|
num_clusters += le32_to_cpu(tl->tl_recs[index].t_clusters);
|
|
mlog(0, "Coalesce with index %u (start = %u, clusters = %u)\n",
|
|
index, le32_to_cpu(tl->tl_recs[index].t_start),
|
|
num_clusters);
|
|
} else {
|
|
tl->tl_recs[index].t_start = cpu_to_le32(start_cluster);
|
|
tl->tl_used = cpu_to_le16(index + 1);
|
|
}
|
|
tl->tl_recs[index].t_clusters = cpu_to_le32(num_clusters);
|
|
|
|
status = ocfs2_journal_dirty(handle, tl_bh);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
bail:
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
static int ocfs2_replay_truncate_records(struct ocfs2_super *osb,
|
|
handle_t *handle,
|
|
struct inode *data_alloc_inode,
|
|
struct buffer_head *data_alloc_bh)
|
|
{
|
|
int status = 0;
|
|
int i;
|
|
unsigned int num_clusters;
|
|
u64 start_blk;
|
|
struct ocfs2_truncate_rec rec;
|
|
struct ocfs2_dinode *di;
|
|
struct ocfs2_truncate_log *tl;
|
|
struct inode *tl_inode = osb->osb_tl_inode;
|
|
struct buffer_head *tl_bh = osb->osb_tl_bh;
|
|
|
|
mlog_entry_void();
|
|
|
|
di = (struct ocfs2_dinode *) tl_bh->b_data;
|
|
tl = &di->id2.i_dealloc;
|
|
i = le16_to_cpu(tl->tl_used) - 1;
|
|
while (i >= 0) {
|
|
/* Caller has given us at least enough credits to
|
|
* update the truncate log dinode */
|
|
status = ocfs2_journal_access(handle, tl_inode, tl_bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
tl->tl_used = cpu_to_le16(i);
|
|
|
|
status = ocfs2_journal_dirty(handle, tl_bh);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
/* TODO: Perhaps we can calculate the bulk of the
|
|
* credits up front rather than extending like
|
|
* this. */
|
|
status = ocfs2_extend_trans(handle,
|
|
OCFS2_TRUNCATE_LOG_FLUSH_ONE_REC);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
rec = tl->tl_recs[i];
|
|
start_blk = ocfs2_clusters_to_blocks(data_alloc_inode->i_sb,
|
|
le32_to_cpu(rec.t_start));
|
|
num_clusters = le32_to_cpu(rec.t_clusters);
|
|
|
|
/* if start_blk is not set, we ignore the record as
|
|
* invalid. */
|
|
if (start_blk) {
|
|
mlog(0, "free record %d, start = %u, clusters = %u\n",
|
|
i, le32_to_cpu(rec.t_start), num_clusters);
|
|
|
|
status = ocfs2_free_clusters(handle, data_alloc_inode,
|
|
data_alloc_bh, start_blk,
|
|
num_clusters);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
}
|
|
i--;
|
|
}
|
|
|
|
bail:
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
/* Expects you to already be holding tl_inode->i_mutex */
|
|
static int __ocfs2_flush_truncate_log(struct ocfs2_super *osb)
|
|
{
|
|
int status;
|
|
unsigned int num_to_flush;
|
|
handle_t *handle;
|
|
struct inode *tl_inode = osb->osb_tl_inode;
|
|
struct inode *data_alloc_inode = NULL;
|
|
struct buffer_head *tl_bh = osb->osb_tl_bh;
|
|
struct buffer_head *data_alloc_bh = NULL;
|
|
struct ocfs2_dinode *di;
|
|
struct ocfs2_truncate_log *tl;
|
|
|
|
mlog_entry_void();
|
|
|
|
BUG_ON(mutex_trylock(&tl_inode->i_mutex));
|
|
|
|
di = (struct ocfs2_dinode *) tl_bh->b_data;
|
|
tl = &di->id2.i_dealloc;
|
|
if (!OCFS2_IS_VALID_DINODE(di)) {
|
|
OCFS2_RO_ON_INVALID_DINODE(osb->sb, di);
|
|
status = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
num_to_flush = le16_to_cpu(tl->tl_used);
|
|
mlog(0, "Flush %u records from truncate log #%llu\n",
|
|
num_to_flush, (unsigned long long)OCFS2_I(tl_inode)->ip_blkno);
|
|
if (!num_to_flush) {
|
|
status = 0;
|
|
goto out;
|
|
}
|
|
|
|
data_alloc_inode = ocfs2_get_system_file_inode(osb,
|
|
GLOBAL_BITMAP_SYSTEM_INODE,
|
|
OCFS2_INVALID_SLOT);
|
|
if (!data_alloc_inode) {
|
|
status = -EINVAL;
|
|
mlog(ML_ERROR, "Could not get bitmap inode!\n");
|
|
goto out;
|
|
}
|
|
|
|
mutex_lock(&data_alloc_inode->i_mutex);
|
|
|
|
status = ocfs2_meta_lock(data_alloc_inode, &data_alloc_bh, 1);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto out_mutex;
|
|
}
|
|
|
|
handle = ocfs2_start_trans(osb, OCFS2_TRUNCATE_LOG_UPDATE);
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
mlog_errno(status);
|
|
goto out_unlock;
|
|
}
|
|
|
|
status = ocfs2_replay_truncate_records(osb, handle, data_alloc_inode,
|
|
data_alloc_bh);
|
|
if (status < 0)
|
|
mlog_errno(status);
|
|
|
|
ocfs2_commit_trans(osb, handle);
|
|
|
|
out_unlock:
|
|
brelse(data_alloc_bh);
|
|
ocfs2_meta_unlock(data_alloc_inode, 1);
|
|
|
|
out_mutex:
|
|
mutex_unlock(&data_alloc_inode->i_mutex);
|
|
iput(data_alloc_inode);
|
|
|
|
out:
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
int ocfs2_flush_truncate_log(struct ocfs2_super *osb)
|
|
{
|
|
int status;
|
|
struct inode *tl_inode = osb->osb_tl_inode;
|
|
|
|
mutex_lock(&tl_inode->i_mutex);
|
|
status = __ocfs2_flush_truncate_log(osb);
|
|
mutex_unlock(&tl_inode->i_mutex);
|
|
|
|
return status;
|
|
}
|
|
|
|
static void ocfs2_truncate_log_worker(struct work_struct *work)
|
|
{
|
|
int status;
|
|
struct ocfs2_super *osb =
|
|
container_of(work, struct ocfs2_super,
|
|
osb_truncate_log_wq.work);
|
|
|
|
mlog_entry_void();
|
|
|
|
status = ocfs2_flush_truncate_log(osb);
|
|
if (status < 0)
|
|
mlog_errno(status);
|
|
|
|
mlog_exit(status);
|
|
}
|
|
|
|
#define OCFS2_TRUNCATE_LOG_FLUSH_INTERVAL (2 * HZ)
|
|
void ocfs2_schedule_truncate_log_flush(struct ocfs2_super *osb,
|
|
int cancel)
|
|
{
|
|
if (osb->osb_tl_inode) {
|
|
/* We want to push off log flushes while truncates are
|
|
* still running. */
|
|
if (cancel)
|
|
cancel_delayed_work(&osb->osb_truncate_log_wq);
|
|
|
|
queue_delayed_work(ocfs2_wq, &osb->osb_truncate_log_wq,
|
|
OCFS2_TRUNCATE_LOG_FLUSH_INTERVAL);
|
|
}
|
|
}
|
|
|
|
static int ocfs2_get_truncate_log_info(struct ocfs2_super *osb,
|
|
int slot_num,
|
|
struct inode **tl_inode,
|
|
struct buffer_head **tl_bh)
|
|
{
|
|
int status;
|
|
struct inode *inode = NULL;
|
|
struct buffer_head *bh = NULL;
|
|
|
|
inode = ocfs2_get_system_file_inode(osb,
|
|
TRUNCATE_LOG_SYSTEM_INODE,
|
|
slot_num);
|
|
if (!inode) {
|
|
status = -EINVAL;
|
|
mlog(ML_ERROR, "Could not get load truncate log inode!\n");
|
|
goto bail;
|
|
}
|
|
|
|
status = ocfs2_read_block(osb, OCFS2_I(inode)->ip_blkno, &bh,
|
|
OCFS2_BH_CACHED, inode);
|
|
if (status < 0) {
|
|
iput(inode);
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
*tl_inode = inode;
|
|
*tl_bh = bh;
|
|
bail:
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
/* called during the 1st stage of node recovery. we stamp a clean
|
|
* truncate log and pass back a copy for processing later. if the
|
|
* truncate log does not require processing, a *tl_copy is set to
|
|
* NULL. */
|
|
int ocfs2_begin_truncate_log_recovery(struct ocfs2_super *osb,
|
|
int slot_num,
|
|
struct ocfs2_dinode **tl_copy)
|
|
{
|
|
int status;
|
|
struct inode *tl_inode = NULL;
|
|
struct buffer_head *tl_bh = NULL;
|
|
struct ocfs2_dinode *di;
|
|
struct ocfs2_truncate_log *tl;
|
|
|
|
*tl_copy = NULL;
|
|
|
|
mlog(0, "recover truncate log from slot %d\n", slot_num);
|
|
|
|
status = ocfs2_get_truncate_log_info(osb, slot_num, &tl_inode, &tl_bh);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
di = (struct ocfs2_dinode *) tl_bh->b_data;
|
|
tl = &di->id2.i_dealloc;
|
|
if (!OCFS2_IS_VALID_DINODE(di)) {
|
|
OCFS2_RO_ON_INVALID_DINODE(tl_inode->i_sb, di);
|
|
status = -EIO;
|
|
goto bail;
|
|
}
|
|
|
|
if (le16_to_cpu(tl->tl_used)) {
|
|
mlog(0, "We'll have %u logs to recover\n",
|
|
le16_to_cpu(tl->tl_used));
|
|
|
|
*tl_copy = kmalloc(tl_bh->b_size, GFP_KERNEL);
|
|
if (!(*tl_copy)) {
|
|
status = -ENOMEM;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
/* Assuming the write-out below goes well, this copy
|
|
* will be passed back to recovery for processing. */
|
|
memcpy(*tl_copy, tl_bh->b_data, tl_bh->b_size);
|
|
|
|
/* All we need to do to clear the truncate log is set
|
|
* tl_used. */
|
|
tl->tl_used = 0;
|
|
|
|
status = ocfs2_write_block(osb, tl_bh, tl_inode);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
bail:
|
|
if (tl_inode)
|
|
iput(tl_inode);
|
|
if (tl_bh)
|
|
brelse(tl_bh);
|
|
|
|
if (status < 0 && (*tl_copy)) {
|
|
kfree(*tl_copy);
|
|
*tl_copy = NULL;
|
|
}
|
|
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
int ocfs2_complete_truncate_log_recovery(struct ocfs2_super *osb,
|
|
struct ocfs2_dinode *tl_copy)
|
|
{
|
|
int status = 0;
|
|
int i;
|
|
unsigned int clusters, num_recs, start_cluster;
|
|
u64 start_blk;
|
|
handle_t *handle;
|
|
struct inode *tl_inode = osb->osb_tl_inode;
|
|
struct ocfs2_truncate_log *tl;
|
|
|
|
mlog_entry_void();
|
|
|
|
if (OCFS2_I(tl_inode)->ip_blkno == le64_to_cpu(tl_copy->i_blkno)) {
|
|
mlog(ML_ERROR, "Asked to recover my own truncate log!\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
tl = &tl_copy->id2.i_dealloc;
|
|
num_recs = le16_to_cpu(tl->tl_used);
|
|
mlog(0, "cleanup %u records from %llu\n", num_recs,
|
|
(unsigned long long)tl_copy->i_blkno);
|
|
|
|
mutex_lock(&tl_inode->i_mutex);
|
|
for(i = 0; i < num_recs; i++) {
|
|
if (ocfs2_truncate_log_needs_flush(osb)) {
|
|
status = __ocfs2_flush_truncate_log(osb);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail_up;
|
|
}
|
|
}
|
|
|
|
handle = ocfs2_start_trans(osb, OCFS2_TRUNCATE_LOG_UPDATE);
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
mlog_errno(status);
|
|
goto bail_up;
|
|
}
|
|
|
|
clusters = le32_to_cpu(tl->tl_recs[i].t_clusters);
|
|
start_cluster = le32_to_cpu(tl->tl_recs[i].t_start);
|
|
start_blk = ocfs2_clusters_to_blocks(osb->sb, start_cluster);
|
|
|
|
status = ocfs2_truncate_log_append(osb, handle,
|
|
start_blk, clusters);
|
|
ocfs2_commit_trans(osb, handle);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail_up;
|
|
}
|
|
}
|
|
|
|
bail_up:
|
|
mutex_unlock(&tl_inode->i_mutex);
|
|
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
void ocfs2_truncate_log_shutdown(struct ocfs2_super *osb)
|
|
{
|
|
int status;
|
|
struct inode *tl_inode = osb->osb_tl_inode;
|
|
|
|
mlog_entry_void();
|
|
|
|
if (tl_inode) {
|
|
cancel_delayed_work(&osb->osb_truncate_log_wq);
|
|
flush_workqueue(ocfs2_wq);
|
|
|
|
status = ocfs2_flush_truncate_log(osb);
|
|
if (status < 0)
|
|
mlog_errno(status);
|
|
|
|
brelse(osb->osb_tl_bh);
|
|
iput(osb->osb_tl_inode);
|
|
}
|
|
|
|
mlog_exit_void();
|
|
}
|
|
|
|
int ocfs2_truncate_log_init(struct ocfs2_super *osb)
|
|
{
|
|
int status;
|
|
struct inode *tl_inode = NULL;
|
|
struct buffer_head *tl_bh = NULL;
|
|
|
|
mlog_entry_void();
|
|
|
|
status = ocfs2_get_truncate_log_info(osb,
|
|
osb->slot_num,
|
|
&tl_inode,
|
|
&tl_bh);
|
|
if (status < 0)
|
|
mlog_errno(status);
|
|
|
|
/* ocfs2_truncate_log_shutdown keys on the existence of
|
|
* osb->osb_tl_inode so we don't set any of the osb variables
|
|
* until we're sure all is well. */
|
|
INIT_DELAYED_WORK(&osb->osb_truncate_log_wq,
|
|
ocfs2_truncate_log_worker);
|
|
osb->osb_tl_bh = tl_bh;
|
|
osb->osb_tl_inode = tl_inode;
|
|
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
/* This function will figure out whether the currently last extent
|
|
* block will be deleted, and if it will, what the new last extent
|
|
* block will be so we can update his h_next_leaf_blk field, as well
|
|
* as the dinodes i_last_eb_blk */
|
|
static int ocfs2_find_new_last_ext_blk(struct inode *inode,
|
|
u32 new_i_clusters,
|
|
struct ocfs2_path *path,
|
|
struct buffer_head **new_last_eb)
|
|
{
|
|
int ret = 0;
|
|
u32 cpos;
|
|
struct ocfs2_extent_block *eb;
|
|
struct ocfs2_extent_list *el;
|
|
struct buffer_head *bh = NULL;
|
|
|
|
*new_last_eb = NULL;
|
|
|
|
/* we have no tree, so of course, no last_eb. */
|
|
if (!path->p_tree_depth)
|
|
goto out;
|
|
|
|
/* trunc to zero special case - this makes tree_depth = 0
|
|
* regardless of what it is. */
|
|
if (!new_i_clusters)
|
|
goto out;
|
|
|
|
el = path_leaf_el(path);
|
|
BUG_ON(!el->l_next_free_rec);
|
|
|
|
/* Make sure that this guy will actually be empty after we
|
|
* clear away the data. */
|
|
if (ocfs2_is_empty_extent(&el->l_recs[0])) {
|
|
if (le16_to_cpu(el->l_next_free_rec) > 1 &&
|
|
le32_to_cpu(el->l_recs[1].e_cpos) < new_i_clusters)
|
|
goto out;
|
|
} else if (le32_to_cpu(el->l_recs[0].e_cpos) < new_i_clusters)
|
|
goto out;
|
|
|
|
ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb, path, &cpos);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = ocfs2_find_leaf(inode, path_root_el(path), cpos, &bh);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
eb = (struct ocfs2_extent_block *) bh->b_data;
|
|
el = &eb->h_list;
|
|
if (!OCFS2_IS_VALID_EXTENT_BLOCK(eb)) {
|
|
OCFS2_RO_ON_INVALID_EXTENT_BLOCK(inode->i_sb, eb);
|
|
ret = -EROFS;
|
|
goto out;
|
|
}
|
|
|
|
*new_last_eb = bh;
|
|
get_bh(*new_last_eb);
|
|
mlog(0, "returning block %llu, (cpos: %u)\n",
|
|
(unsigned long long)le64_to_cpu(eb->h_blkno), cpos);
|
|
out:
|
|
brelse(bh);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ocfs2_do_truncate(struct ocfs2_super *osb,
|
|
unsigned int clusters_to_del,
|
|
struct inode *inode,
|
|
struct buffer_head *fe_bh,
|
|
handle_t *handle,
|
|
struct ocfs2_truncate_context *tc,
|
|
struct ocfs2_path *path)
|
|
{
|
|
int status, i, index;
|
|
struct ocfs2_dinode *fe;
|
|
struct ocfs2_extent_block *eb;
|
|
struct ocfs2_extent_block *last_eb = NULL;
|
|
struct ocfs2_extent_list *el;
|
|
struct buffer_head *eb_bh = NULL;
|
|
struct buffer_head *last_eb_bh = NULL;
|
|
u64 delete_blk = 0;
|
|
|
|
fe = (struct ocfs2_dinode *) fe_bh->b_data;
|
|
|
|
status = ocfs2_find_new_last_ext_blk(inode,
|
|
le32_to_cpu(fe->i_clusters) -
|
|
clusters_to_del,
|
|
path, &last_eb_bh);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
/*
|
|
* Each component will be touched, so we might as well journal
|
|
* here to avoid having to handle errors later.
|
|
*/
|
|
for (i = 0; i < path_num_items(path); i++) {
|
|
status = ocfs2_journal_access(handle, inode,
|
|
path->p_node[i].bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
if (last_eb_bh) {
|
|
status = ocfs2_journal_access(handle, inode, last_eb_bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
last_eb = (struct ocfs2_extent_block *) last_eb_bh->b_data;
|
|
}
|
|
|
|
el = &(fe->id2.i_list);
|
|
|
|
/*
|
|
* Lower levels depend on this never happening, but it's best
|
|
* to check it up here before changing the tree.
|
|
*/
|
|
if (el->l_tree_depth && ocfs2_is_empty_extent(&el->l_recs[0])) {
|
|
ocfs2_error(inode->i_sb,
|
|
"Inode %lu has an empty extent record, depth %u\n",
|
|
inode->i_ino, le16_to_cpu(el->l_tree_depth));
|
|
goto bail;
|
|
}
|
|
|
|
spin_lock(&OCFS2_I(inode)->ip_lock);
|
|
OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters) -
|
|
clusters_to_del;
|
|
spin_unlock(&OCFS2_I(inode)->ip_lock);
|
|
le32_add_cpu(&fe->i_clusters, -clusters_to_del);
|
|
|
|
i = le16_to_cpu(el->l_next_free_rec) - 1;
|
|
|
|
BUG_ON(le32_to_cpu(el->l_recs[i].e_clusters) < clusters_to_del);
|
|
le32_add_cpu(&el->l_recs[i].e_clusters, -clusters_to_del);
|
|
/* tree depth zero, we can just delete the clusters, otherwise
|
|
* we need to record the offset of the next level extent block
|
|
* as we may overwrite it. */
|
|
if (!el->l_tree_depth) {
|
|
delete_blk = le64_to_cpu(el->l_recs[i].e_blkno)
|
|
+ ocfs2_clusters_to_blocks(osb->sb,
|
|
le32_to_cpu(el->l_recs[i].e_clusters));
|
|
|
|
if (!el->l_recs[i].e_clusters) {
|
|
/* if we deleted the whole extent record, then clear
|
|
* out the other fields and update the extent
|
|
* list.
|
|
*/
|
|
el->l_recs[i].e_cpos = 0;
|
|
el->l_recs[i].e_blkno = 0;
|
|
BUG_ON(!el->l_next_free_rec);
|
|
le16_add_cpu(&el->l_next_free_rec, -1);
|
|
|
|
/*
|
|
* The leftmost record might be an empty extent -
|
|
* delete it here too.
|
|
*/
|
|
if (i == 1 && ocfs2_is_empty_extent(&el->l_recs[0])) {
|
|
el->l_recs[0].e_cpos = 0;
|
|
el->l_recs[0].e_blkno = 0;
|
|
el->l_next_free_rec = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (le32_to_cpu(fe->i_clusters) == 0) {
|
|
/* trunc to zero is a special case. */
|
|
el->l_tree_depth = 0;
|
|
fe->i_last_eb_blk = 0;
|
|
} else if (last_eb)
|
|
fe->i_last_eb_blk = last_eb->h_blkno;
|
|
|
|
status = ocfs2_journal_dirty(handle, fe_bh);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
if (last_eb) {
|
|
/* If there will be a new last extent block, then by
|
|
* definition, there cannot be any leaves to the right of
|
|
* him. */
|
|
last_eb->h_next_leaf_blk = 0;
|
|
status = ocfs2_journal_dirty(handle, last_eb_bh);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
index = 1;
|
|
/* if our tree depth > 0, update all the tree blocks below us. */
|
|
while (index <= path->p_tree_depth) {
|
|
eb_bh = path->p_node[index].bh;
|
|
eb = (struct ocfs2_extent_block *)eb_bh->b_data;
|
|
el = path->p_node[index].el;
|
|
|
|
mlog(0, "traveling tree (index = %d, extent block: %llu)\n",
|
|
index, (unsigned long long)eb_bh->b_blocknr);
|
|
|
|
BUG_ON(le16_to_cpu(el->l_next_free_rec) == 0);
|
|
if (index !=
|
|
(path->p_tree_depth - le16_to_cpu(el->l_tree_depth))) {
|
|
ocfs2_error(inode->i_sb,
|
|
"Inode %lu has invalid ext. block %llu\n",
|
|
inode->i_ino,
|
|
(unsigned long long)eb_bh->b_blocknr);
|
|
goto bail;
|
|
}
|
|
|
|
i = le16_to_cpu(el->l_next_free_rec) - 1;
|
|
|
|
mlog(0, "extent block %llu, before: record %d: "
|
|
"(%u, %u, %llu), next = %u\n",
|
|
(unsigned long long)le64_to_cpu(eb->h_blkno), i,
|
|
le32_to_cpu(el->l_recs[i].e_cpos),
|
|
le32_to_cpu(el->l_recs[i].e_clusters),
|
|
(unsigned long long)le64_to_cpu(el->l_recs[i].e_blkno),
|
|
le16_to_cpu(el->l_next_free_rec));
|
|
|
|
BUG_ON(le32_to_cpu(el->l_recs[i].e_clusters) < clusters_to_del);
|
|
le32_add_cpu(&el->l_recs[i].e_clusters, -clusters_to_del);
|
|
|
|
/* bottom-most block requires us to delete data.*/
|
|
if (!el->l_tree_depth)
|
|
delete_blk = le64_to_cpu(el->l_recs[i].e_blkno)
|
|
+ ocfs2_clusters_to_blocks(osb->sb,
|
|
le32_to_cpu(el->l_recs[i].e_clusters));
|
|
if (!el->l_recs[i].e_clusters) {
|
|
el->l_recs[i].e_cpos = 0;
|
|
el->l_recs[i].e_blkno = 0;
|
|
BUG_ON(!el->l_next_free_rec);
|
|
le16_add_cpu(&el->l_next_free_rec, -1);
|
|
}
|
|
if (i == 1 && ocfs2_is_empty_extent(&el->l_recs[0])) {
|
|
el->l_recs[0].e_cpos = 0;
|
|
el->l_recs[0].e_blkno = 0;
|
|
el->l_next_free_rec = 0;
|
|
}
|
|
|
|
mlog(0, "extent block %llu, after: record %d: "
|
|
"(%u, %u, %llu), next = %u\n",
|
|
(unsigned long long)le64_to_cpu(eb->h_blkno), i,
|
|
le32_to_cpu(el->l_recs[i].e_cpos),
|
|
le32_to_cpu(el->l_recs[i].e_clusters),
|
|
(unsigned long long)le64_to_cpu(el->l_recs[i].e_blkno),
|
|
le16_to_cpu(el->l_next_free_rec));
|
|
|
|
status = ocfs2_journal_dirty(handle, eb_bh);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
if (!el->l_next_free_rec) {
|
|
mlog(0, "deleting this extent block.\n");
|
|
|
|
ocfs2_remove_from_cache(inode, eb_bh);
|
|
|
|
BUG_ON(el->l_recs[0].e_clusters);
|
|
BUG_ON(el->l_recs[0].e_cpos);
|
|
BUG_ON(el->l_recs[0].e_blkno);
|
|
|
|
/*
|
|
* We need to remove this extent block from
|
|
* the list above it.
|
|
*
|
|
* Since we've passed it already in this loop,
|
|
* no need to worry about journaling.
|
|
*/
|
|
el = path->p_node[index - 1].el;
|
|
i = le16_to_cpu(el->l_next_free_rec) - 1;
|
|
BUG_ON(i < 0);
|
|
el->l_recs[i].e_cpos = 0;
|
|
el->l_recs[i].e_clusters = 0;
|
|
el->l_recs[i].e_blkno = 0;
|
|
le16_add_cpu(&el->l_next_free_rec, -1);
|
|
|
|
if (eb->h_suballoc_slot == 0) {
|
|
/*
|
|
* This code only understands how to
|
|
* lock the suballocator in slot 0,
|
|
* which is fine because allocation is
|
|
* only ever done out of that
|
|
* suballocator too. A future version
|
|
* might change that however, so avoid
|
|
* a free if we don't know how to
|
|
* handle it. This way an fs incompat
|
|
* bit will not be necessary.
|
|
*/
|
|
status = ocfs2_free_extent_block(handle,
|
|
tc->tc_ext_alloc_inode,
|
|
tc->tc_ext_alloc_bh,
|
|
eb);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
}
|
|
}
|
|
index++;
|
|
}
|
|
|
|
BUG_ON(!delete_blk);
|
|
status = ocfs2_truncate_log_append(osb, handle, delete_blk,
|
|
clusters_to_del);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
status = 0;
|
|
bail:
|
|
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* It is expected, that by the time you call this function,
|
|
* inode->i_size and fe->i_size have been adjusted.
|
|
*
|
|
* WARNING: This will kfree the truncate context
|
|
*/
|
|
int ocfs2_commit_truncate(struct ocfs2_super *osb,
|
|
struct inode *inode,
|
|
struct buffer_head *fe_bh,
|
|
struct ocfs2_truncate_context *tc)
|
|
{
|
|
int status, i, credits, tl_sem = 0;
|
|
u32 clusters_to_del, new_highest_cpos, range;
|
|
struct ocfs2_extent_list *el;
|
|
handle_t *handle = NULL;
|
|
struct inode *tl_inode = osb->osb_tl_inode;
|
|
struct ocfs2_path *path = NULL;
|
|
|
|
mlog_entry_void();
|
|
|
|
down_write(&OCFS2_I(inode)->ip_alloc_sem);
|
|
|
|
new_highest_cpos = ocfs2_clusters_for_bytes(osb->sb,
|
|
i_size_read(inode));
|
|
|
|
path = ocfs2_new_inode_path(fe_bh);
|
|
if (!path) {
|
|
status = -ENOMEM;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
start:
|
|
/*
|
|
* Truncate always works against the rightmost tree branch.
|
|
*/
|
|
status = ocfs2_find_path(inode, path, UINT_MAX);
|
|
if (status) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
mlog(0, "inode->ip_clusters = %u, tree_depth = %u\n",
|
|
OCFS2_I(inode)->ip_clusters, path->p_tree_depth);
|
|
|
|
/*
|
|
* By now, el will point to the extent list on the bottom most
|
|
* portion of this tree. Only the tail record is considered in
|
|
* each pass.
|
|
*
|
|
* We handle the following cases, in order:
|
|
* - empty extent: delete the remaining branch
|
|
* - remove the entire record
|
|
* - remove a partial record
|
|
* - no record needs to be removed (truncate has completed)
|
|
*/
|
|
el = path_leaf_el(path);
|
|
i = le16_to_cpu(el->l_next_free_rec) - 1;
|
|
range = le32_to_cpu(el->l_recs[i].e_cpos) +
|
|
le32_to_cpu(el->l_recs[i].e_clusters);
|
|
if (i == 0 && ocfs2_is_empty_extent(&el->l_recs[i])) {
|
|
clusters_to_del = 0;
|
|
} else if (le32_to_cpu(el->l_recs[i].e_cpos) >= new_highest_cpos) {
|
|
clusters_to_del = le32_to_cpu(el->l_recs[i].e_clusters);
|
|
} else if (range > new_highest_cpos) {
|
|
clusters_to_del = (le32_to_cpu(el->l_recs[i].e_clusters) +
|
|
le32_to_cpu(el->l_recs[i].e_cpos)) -
|
|
new_highest_cpos;
|
|
} else {
|
|
status = 0;
|
|
goto bail;
|
|
}
|
|
|
|
mlog(0, "clusters_to_del = %u in this pass, tail blk=%llu\n",
|
|
clusters_to_del, (unsigned long long)path_leaf_bh(path)->b_blocknr);
|
|
|
|
BUG_ON(clusters_to_del == 0);
|
|
|
|
mutex_lock(&tl_inode->i_mutex);
|
|
tl_sem = 1;
|
|
/* ocfs2_truncate_log_needs_flush guarantees us at least one
|
|
* record is free for use. If there isn't any, we flush to get
|
|
* an empty truncate log. */
|
|
if (ocfs2_truncate_log_needs_flush(osb)) {
|
|
status = __ocfs2_flush_truncate_log(osb);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
credits = ocfs2_calc_tree_trunc_credits(osb->sb, clusters_to_del,
|
|
(struct ocfs2_dinode *)fe_bh->b_data,
|
|
el);
|
|
handle = ocfs2_start_trans(osb, credits);
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
handle = NULL;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
status = ocfs2_do_truncate(osb, clusters_to_del, inode, fe_bh, handle,
|
|
tc, path);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
mutex_unlock(&tl_inode->i_mutex);
|
|
tl_sem = 0;
|
|
|
|
ocfs2_commit_trans(osb, handle);
|
|
handle = NULL;
|
|
|
|
ocfs2_reinit_path(path, 1);
|
|
|
|
/*
|
|
* Only loop if we still have allocation.
|
|
*/
|
|
if (OCFS2_I(inode)->ip_clusters)
|
|
goto start;
|
|
bail:
|
|
up_write(&OCFS2_I(inode)->ip_alloc_sem);
|
|
|
|
ocfs2_schedule_truncate_log_flush(osb, 1);
|
|
|
|
if (tl_sem)
|
|
mutex_unlock(&tl_inode->i_mutex);
|
|
|
|
if (handle)
|
|
ocfs2_commit_trans(osb, handle);
|
|
|
|
ocfs2_free_path(path);
|
|
|
|
/* This will drop the ext_alloc cluster lock for us */
|
|
ocfs2_free_truncate_context(tc);
|
|
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Expects the inode to already be locked. This will figure out which
|
|
* inodes need to be locked and will put them on the returned truncate
|
|
* context.
|
|
*/
|
|
int ocfs2_prepare_truncate(struct ocfs2_super *osb,
|
|
struct inode *inode,
|
|
struct buffer_head *fe_bh,
|
|
struct ocfs2_truncate_context **tc)
|
|
{
|
|
int status, metadata_delete, i;
|
|
unsigned int new_i_clusters;
|
|
struct ocfs2_dinode *fe;
|
|
struct ocfs2_extent_block *eb;
|
|
struct ocfs2_extent_list *el;
|
|
struct buffer_head *last_eb_bh = NULL;
|
|
struct inode *ext_alloc_inode = NULL;
|
|
struct buffer_head *ext_alloc_bh = NULL;
|
|
|
|
mlog_entry_void();
|
|
|
|
*tc = NULL;
|
|
|
|
new_i_clusters = ocfs2_clusters_for_bytes(osb->sb,
|
|
i_size_read(inode));
|
|
fe = (struct ocfs2_dinode *) fe_bh->b_data;
|
|
|
|
mlog(0, "fe->i_clusters = %u, new_i_clusters = %u, fe->i_size ="
|
|
"%llu\n", fe->i_clusters, new_i_clusters,
|
|
(unsigned long long)fe->i_size);
|
|
|
|
if (!ocfs2_sparse_alloc(osb) &&
|
|
le32_to_cpu(fe->i_clusters) <= new_i_clusters) {
|
|
ocfs2_error(inode->i_sb, "Dinode %llu has cluster count "
|
|
"%u and size %llu whereas struct inode has "
|
|
"cluster count %u and size %llu which caused an "
|
|
"invalid truncate to %u clusters.",
|
|
(unsigned long long)le64_to_cpu(fe->i_blkno),
|
|
le32_to_cpu(fe->i_clusters),
|
|
(unsigned long long)le64_to_cpu(fe->i_size),
|
|
OCFS2_I(inode)->ip_clusters, i_size_read(inode),
|
|
new_i_clusters);
|
|
mlog_meta_lvb(ML_ERROR, &OCFS2_I(inode)->ip_meta_lockres);
|
|
status = -EIO;
|
|
goto bail;
|
|
}
|
|
|
|
*tc = kzalloc(sizeof(struct ocfs2_truncate_context), GFP_KERNEL);
|
|
if (!(*tc)) {
|
|
status = -ENOMEM;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
metadata_delete = 0;
|
|
if (fe->id2.i_list.l_tree_depth) {
|
|
/* If we have a tree, then the truncate may result in
|
|
* metadata deletes. Figure this out from the
|
|
* rightmost leaf block.*/
|
|
status = ocfs2_read_block(osb, le64_to_cpu(fe->i_last_eb_blk),
|
|
&last_eb_bh, OCFS2_BH_CACHED, inode);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
eb = (struct ocfs2_extent_block *) last_eb_bh->b_data;
|
|
if (!OCFS2_IS_VALID_EXTENT_BLOCK(eb)) {
|
|
OCFS2_RO_ON_INVALID_EXTENT_BLOCK(inode->i_sb, eb);
|
|
|
|
brelse(last_eb_bh);
|
|
status = -EIO;
|
|
goto bail;
|
|
}
|
|
el = &(eb->h_list);
|
|
|
|
i = 0;
|
|
if (ocfs2_is_empty_extent(&el->l_recs[0]))
|
|
i = 1;
|
|
/*
|
|
* XXX: Should we check that next_free_rec contains
|
|
* the extent?
|
|
*/
|
|
if (le32_to_cpu(el->l_recs[i].e_cpos) >= new_i_clusters)
|
|
metadata_delete = 1;
|
|
}
|
|
|
|
(*tc)->tc_last_eb_bh = last_eb_bh;
|
|
|
|
if (metadata_delete) {
|
|
mlog(0, "Will have to delete metadata for this trunc. "
|
|
"locking allocator.\n");
|
|
ext_alloc_inode = ocfs2_get_system_file_inode(osb, EXTENT_ALLOC_SYSTEM_INODE, 0);
|
|
if (!ext_alloc_inode) {
|
|
status = -ENOMEM;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
mutex_lock(&ext_alloc_inode->i_mutex);
|
|
(*tc)->tc_ext_alloc_inode = ext_alloc_inode;
|
|
|
|
status = ocfs2_meta_lock(ext_alloc_inode, &ext_alloc_bh, 1);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
(*tc)->tc_ext_alloc_bh = ext_alloc_bh;
|
|
(*tc)->tc_ext_alloc_locked = 1;
|
|
}
|
|
|
|
status = 0;
|
|
bail:
|
|
if (status < 0) {
|
|
if (*tc)
|
|
ocfs2_free_truncate_context(*tc);
|
|
*tc = NULL;
|
|
}
|
|
mlog_exit_void();
|
|
return status;
|
|
}
|
|
|
|
static void ocfs2_free_truncate_context(struct ocfs2_truncate_context *tc)
|
|
{
|
|
if (tc->tc_ext_alloc_inode) {
|
|
if (tc->tc_ext_alloc_locked)
|
|
ocfs2_meta_unlock(tc->tc_ext_alloc_inode, 1);
|
|
|
|
mutex_unlock(&tc->tc_ext_alloc_inode->i_mutex);
|
|
iput(tc->tc_ext_alloc_inode);
|
|
}
|
|
|
|
if (tc->tc_ext_alloc_bh)
|
|
brelse(tc->tc_ext_alloc_bh);
|
|
|
|
if (tc->tc_last_eb_bh)
|
|
brelse(tc->tc_last_eb_bh);
|
|
|
|
kfree(tc);
|
|
}
|