LCOV - code coverage report
Current view: top level - fs/btrfs - delayed-inode.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 7 0.0 %
Date: 2014-02-18 Functions: 0 0 -
Branches: 0 0 -

           Branch data     Line data    Source code
       1                 :            : /*
       2                 :            :  * Copyright (C) 2011 Fujitsu.  All rights reserved.
       3                 :            :  * Written by Miao Xie <miaox@cn.fujitsu.com>
       4                 :            :  *
       5                 :            :  * This program is free software; you can redistribute it and/or
       6                 :            :  * modify it under the terms of the GNU General Public
       7                 :            :  * License v2 as published by the Free Software Foundation.
       8                 :            :  *
       9                 :            :  * This program is distributed in the hope that it will be useful,
      10                 :            :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      11                 :            :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12                 :            :  * General Public License for more details.
      13                 :            :  *
      14                 :            :  * You should have received a copy of the GNU General Public
      15                 :            :  * License along with this program; if not, write to the
      16                 :            :  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
      17                 :            :  * Boston, MA 021110-1307, USA.
      18                 :            :  */
      19                 :            : 
      20                 :            : #ifndef __DELAYED_TREE_OPERATION_H
      21                 :            : #define __DELAYED_TREE_OPERATION_H
      22                 :            : 
      23                 :            : #include <linux/rbtree.h>
      24                 :            : #include <linux/spinlock.h>
      25                 :            : #include <linux/mutex.h>
      26                 :            : #include <linux/list.h>
      27                 :            : #include <linux/wait.h>
      28                 :            : #include <linux/atomic.h>
      29                 :            : 
      30                 :            : #include "ctree.h"
      31                 :            : 
      32                 :            : /* types of the delayed item */
      33                 :            : #define BTRFS_DELAYED_INSERTION_ITEM    1
      34                 :            : #define BTRFS_DELAYED_DELETION_ITEM     2
      35                 :            : 
      36                 :            : struct btrfs_delayed_root {
      37                 :            :         spinlock_t lock;
      38                 :            :         struct list_head node_list;
      39                 :            :         /*
      40                 :            :          * Used for delayed nodes which is waiting to be dealt with by the
      41                 :            :          * worker. If the delayed node is inserted into the work queue, we
      42                 :            :          * drop it from this list.
      43                 :            :          */
      44                 :            :         struct list_head prepare_list;
      45                 :            :         atomic_t items;         /* for delayed items */
      46                 :            :         atomic_t items_seq;     /* for delayed items */
      47                 :            :         int nodes;              /* for delayed nodes */
      48                 :            :         wait_queue_head_t wait;
      49                 :            : };
      50                 :            : 
      51                 :            : struct btrfs_delayed_node {
      52                 :            :         u64 inode_id;
      53                 :            :         u64 bytes_reserved;
      54                 :            :         struct btrfs_root *root;
      55                 :            :         /* Used to add the node into the delayed root's node list. */
      56                 :            :         struct list_head n_list;
      57                 :            :         /*
      58                 :            :          * Used to add the node into the prepare list, the nodes in this list
      59                 :            :          * is waiting to be dealt with by the async worker.
      60                 :            :          */
      61                 :            :         struct list_head p_list;
      62                 :            :         struct rb_root ins_root;
      63                 :            :         struct rb_root del_root;
      64                 :            :         struct mutex mutex;
      65                 :            :         struct btrfs_inode_item inode_item;
      66                 :            :         atomic_t refs;
      67                 :            :         u64 index_cnt;
      68                 :            :         bool in_list;
      69                 :            :         bool inode_dirty;
      70                 :            :         int count;
      71                 :            : };
      72                 :            : 
      73                 :            : struct btrfs_delayed_item {
      74                 :            :         struct rb_node rb_node;
      75                 :            :         struct btrfs_key key;
      76                 :            :         struct list_head tree_list;     /* used for batch insert/delete items */
      77                 :            :         struct list_head readdir_list;  /* used for readdir items */
      78                 :            :         u64 bytes_reserved;
      79                 :            :         struct btrfs_delayed_node *delayed_node;
      80                 :            :         atomic_t refs;
      81                 :            :         int ins_or_del;
      82                 :            :         u32 data_len;
      83                 :            :         char data[0];
      84                 :            : };
      85                 :            : 
      86                 :            : static inline void btrfs_init_delayed_root(
      87                 :            :                                 struct btrfs_delayed_root *delayed_root)
      88                 :            : {
      89                 :          0 :         atomic_set(&delayed_root->items, 0);
      90                 :          0 :         atomic_set(&delayed_root->items_seq, 0);
      91                 :          0 :         delayed_root->nodes = 0;
      92                 :          0 :         spin_lock_init(&delayed_root->lock);
      93                 :          0 :         init_waitqueue_head(&delayed_root->wait);
      94                 :          0 :         INIT_LIST_HEAD(&delayed_root->node_list);
      95                 :          0 :         INIT_LIST_HEAD(&delayed_root->prepare_list);
      96                 :            : }
      97                 :            : 
      98                 :            : int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans,
      99                 :            :                                    struct btrfs_root *root, const char *name,
     100                 :            :                                    int name_len, struct inode *dir,
     101                 :            :                                    struct btrfs_disk_key *disk_key, u8 type,
     102                 :            :                                    u64 index);
     103                 :            : 
     104                 :            : int btrfs_delete_delayed_dir_index(struct btrfs_trans_handle *trans,
     105                 :            :                                    struct btrfs_root *root, struct inode *dir,
     106                 :            :                                    u64 index);
     107                 :            : 
     108                 :            : int btrfs_inode_delayed_dir_index_count(struct inode *inode);
     109                 :            : 
     110                 :            : int btrfs_run_delayed_items(struct btrfs_trans_handle *trans,
     111                 :            :                             struct btrfs_root *root);
     112                 :            : int btrfs_run_delayed_items_nr(struct btrfs_trans_handle *trans,
     113                 :            :                                struct btrfs_root *root, int nr);
     114                 :            : 
     115                 :            : void btrfs_balance_delayed_items(struct btrfs_root *root);
     116                 :            : 
     117                 :            : int btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans,
     118                 :            :                                      struct inode *inode);
     119                 :            : /* Used for evicting the inode. */
     120                 :            : void btrfs_remove_delayed_node(struct inode *inode);
     121                 :            : void btrfs_kill_delayed_inode_items(struct inode *inode);
     122                 :            : int btrfs_commit_inode_delayed_inode(struct inode *inode);
     123                 :            : 
     124                 :            : 
     125                 :            : int btrfs_delayed_update_inode(struct btrfs_trans_handle *trans,
     126                 :            :                                struct btrfs_root *root, struct inode *inode);
     127                 :            : int btrfs_fill_inode(struct inode *inode, u32 *rdev);
     128                 :            : 
     129                 :            : /* Used for drop dead root */
     130                 :            : void btrfs_kill_all_delayed_nodes(struct btrfs_root *root);
     131                 :            : 
     132                 :            : /* Used for clean the transaction */
     133                 :            : void btrfs_destroy_delayed_inodes(struct btrfs_root *root);
     134                 :            : 
     135                 :            : /* Used for readdir() */
     136                 :            : void btrfs_get_delayed_items(struct inode *inode, struct list_head *ins_list,
     137                 :            :                              struct list_head *del_list);
     138                 :            : void btrfs_put_delayed_items(struct list_head *ins_list,
     139                 :            :                              struct list_head *del_list);
     140                 :            : int btrfs_should_delete_dir_index(struct list_head *del_list,
     141                 :            :                                   u64 index);
     142                 :            : int btrfs_readdir_delayed_dir_index(struct dir_context *ctx,
     143                 :            :                                     struct list_head *ins_list);
     144                 :            : 
     145                 :            : /* for init */
     146                 :            : int __init btrfs_delayed_inode_init(void);
     147                 :            : void btrfs_delayed_inode_exit(void);
     148                 :            : 
     149                 :            : /* for debugging */
     150                 :            : void btrfs_assert_delayed_root_empty(struct btrfs_root *root);
     151                 :            : 
     152                 :            : #endif

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