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96c3f4331a
Those crazy gentoo guys have been complaining about ENOSPC errors on their portage volumes. This is because doing things like untar tends to create lots of new files which will soak up all the reservation space in the delayed inodes. Usually this gets papered over by the fact that we will try and commit the transaction, however if this happens in the wrong spot or we choose not to commit the transaction you will be screwed. So add the ability to expclitly flush delayed inodes to free up space. Please test this out guys to make sure it works since as usual I cannot reproduce. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com>
151 lines
4.5 KiB
C
151 lines
4.5 KiB
C
/*
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* Copyright (C) 2011 Fujitsu. All rights reserved.
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* Written by Miao Xie <miaox@cn.fujitsu.com>
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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 v2 as published by the Free Software Foundation.
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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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#ifndef __DELAYED_TREE_OPERATION_H
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#define __DELAYED_TREE_OPERATION_H
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#include <linux/rbtree.h>
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#include <linux/spinlock.h>
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#include <linux/mutex.h>
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#include <linux/list.h>
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#include <linux/wait.h>
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#include <linux/atomic.h>
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#include "ctree.h"
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/* types of the delayed item */
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#define BTRFS_DELAYED_INSERTION_ITEM 1
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#define BTRFS_DELAYED_DELETION_ITEM 2
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struct btrfs_delayed_root {
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spinlock_t lock;
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struct list_head node_list;
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/*
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* Used for delayed nodes which is waiting to be dealt with by the
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* worker. If the delayed node is inserted into the work queue, we
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* drop it from this list.
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*/
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struct list_head prepare_list;
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atomic_t items; /* for delayed items */
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int nodes; /* for delayed nodes */
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wait_queue_head_t wait;
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};
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struct btrfs_delayed_node {
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u64 inode_id;
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u64 bytes_reserved;
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struct btrfs_root *root;
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/* Used to add the node into the delayed root's node list. */
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struct list_head n_list;
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/*
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* Used to add the node into the prepare list, the nodes in this list
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* is waiting to be dealt with by the async worker.
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*/
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struct list_head p_list;
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struct rb_root ins_root;
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struct rb_root del_root;
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struct mutex mutex;
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struct btrfs_inode_item inode_item;
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atomic_t refs;
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u64 index_cnt;
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bool in_list;
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bool inode_dirty;
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int count;
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};
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struct btrfs_delayed_item {
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struct rb_node rb_node;
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struct btrfs_key key;
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struct list_head tree_list; /* used for batch insert/delete items */
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struct list_head readdir_list; /* used for readdir items */
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u64 bytes_reserved;
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struct btrfs_delayed_node *delayed_node;
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atomic_t refs;
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int ins_or_del;
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u32 data_len;
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char data[0];
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};
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static inline void btrfs_init_delayed_root(
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struct btrfs_delayed_root *delayed_root)
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{
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atomic_set(&delayed_root->items, 0);
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delayed_root->nodes = 0;
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spin_lock_init(&delayed_root->lock);
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init_waitqueue_head(&delayed_root->wait);
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INIT_LIST_HEAD(&delayed_root->node_list);
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INIT_LIST_HEAD(&delayed_root->prepare_list);
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}
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int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans,
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struct btrfs_root *root, const char *name,
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int name_len, struct inode *dir,
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struct btrfs_disk_key *disk_key, u8 type,
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u64 index);
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int btrfs_delete_delayed_dir_index(struct btrfs_trans_handle *trans,
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struct btrfs_root *root, struct inode *dir,
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u64 index);
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int btrfs_inode_delayed_dir_index_count(struct inode *inode);
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int btrfs_run_delayed_items(struct btrfs_trans_handle *trans,
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struct btrfs_root *root);
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int btrfs_run_delayed_items_nr(struct btrfs_trans_handle *trans,
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struct btrfs_root *root, int nr);
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void btrfs_balance_delayed_items(struct btrfs_root *root);
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int btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans,
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struct inode *inode);
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/* Used for evicting the inode. */
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void btrfs_remove_delayed_node(struct inode *inode);
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void btrfs_kill_delayed_inode_items(struct inode *inode);
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int btrfs_delayed_update_inode(struct btrfs_trans_handle *trans,
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struct btrfs_root *root, struct inode *inode);
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int btrfs_fill_inode(struct inode *inode, u32 *rdev);
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/* Used for drop dead root */
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void btrfs_kill_all_delayed_nodes(struct btrfs_root *root);
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/* Used for clean the transaction */
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void btrfs_destroy_delayed_inodes(struct btrfs_root *root);
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/* Used for readdir() */
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void btrfs_get_delayed_items(struct inode *inode, struct list_head *ins_list,
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struct list_head *del_list);
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void btrfs_put_delayed_items(struct list_head *ins_list,
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struct list_head *del_list);
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int btrfs_should_delete_dir_index(struct list_head *del_list,
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u64 index);
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int btrfs_readdir_delayed_dir_index(struct file *filp, void *dirent,
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filldir_t filldir,
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struct list_head *ins_list);
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/* for init */
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int __init btrfs_delayed_inode_init(void);
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void btrfs_delayed_inode_exit(void);
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/* for debugging */
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void btrfs_assert_delayed_root_empty(struct btrfs_root *root);
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#endif
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