mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 05:34:00 +08:00
9c931c5ab2
In the comment describing the sync_writers field of the btrfs_inode struct, "fsyncing" was misspelled "fsycing." Signed-off-by: Nathaniel Yazdani <n1ght.4nd.d4y@gmail.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
240 lines
6.4 KiB
C
240 lines
6.4 KiB
C
/*
|
|
* Copyright (C) 2007 Oracle. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public
|
|
* License v2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public
|
|
* License along with this program; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 021110-1307, USA.
|
|
*/
|
|
|
|
#ifndef __BTRFS_I__
|
|
#define __BTRFS_I__
|
|
|
|
#include "extent_map.h"
|
|
#include "extent_io.h"
|
|
#include "ordered-data.h"
|
|
#include "delayed-inode.h"
|
|
|
|
/*
|
|
* ordered_data_close is set by truncate when a file that used
|
|
* to have good data has been truncated to zero. When it is set
|
|
* the btrfs file release call will add this inode to the
|
|
* ordered operations list so that we make sure to flush out any
|
|
* new data the application may have written before commit.
|
|
*/
|
|
#define BTRFS_INODE_ORDERED_DATA_CLOSE 0
|
|
#define BTRFS_INODE_ORPHAN_META_RESERVED 1
|
|
#define BTRFS_INODE_DUMMY 2
|
|
#define BTRFS_INODE_IN_DEFRAG 3
|
|
#define BTRFS_INODE_DELALLOC_META_RESERVED 4
|
|
#define BTRFS_INODE_HAS_ORPHAN_ITEM 5
|
|
#define BTRFS_INODE_HAS_ASYNC_EXTENT 6
|
|
#define BTRFS_INODE_NEEDS_FULL_SYNC 7
|
|
#define BTRFS_INODE_COPY_EVERYTHING 8
|
|
#define BTRFS_INODE_IN_DELALLOC_LIST 9
|
|
#define BTRFS_INODE_READDIO_NEED_LOCK 10
|
|
|
|
/* in memory btrfs inode */
|
|
struct btrfs_inode {
|
|
/* which subvolume this inode belongs to */
|
|
struct btrfs_root *root;
|
|
|
|
/* key used to find this inode on disk. This is used by the code
|
|
* to read in roots of subvolumes
|
|
*/
|
|
struct btrfs_key location;
|
|
|
|
/* Lock for counters */
|
|
spinlock_t lock;
|
|
|
|
/* the extent_tree has caches of all the extent mappings to disk */
|
|
struct extent_map_tree extent_tree;
|
|
|
|
/* the io_tree does range state (DIRTY, LOCKED etc) */
|
|
struct extent_io_tree io_tree;
|
|
|
|
/* special utility tree used to record which mirrors have already been
|
|
* tried when checksums fail for a given block
|
|
*/
|
|
struct extent_io_tree io_failure_tree;
|
|
|
|
/* held while logging the inode in tree-log.c */
|
|
struct mutex log_mutex;
|
|
|
|
/* held while doing delalloc reservations */
|
|
struct mutex delalloc_mutex;
|
|
|
|
/* used to order data wrt metadata */
|
|
struct btrfs_ordered_inode_tree ordered_tree;
|
|
|
|
/* list of all the delalloc inodes in the FS. There are times we need
|
|
* to write all the delalloc pages to disk, and this list is used
|
|
* to walk them all.
|
|
*/
|
|
struct list_head delalloc_inodes;
|
|
|
|
/*
|
|
* list for tracking inodes that must be sent to disk before a
|
|
* rename or truncate commit
|
|
*/
|
|
struct list_head ordered_operations;
|
|
|
|
/* node for the red-black tree that links inodes in subvolume root */
|
|
struct rb_node rb_node;
|
|
|
|
unsigned long runtime_flags;
|
|
|
|
/* Keep track of who's O_SYNC/fsyncing currently */
|
|
atomic_t sync_writers;
|
|
|
|
/* full 64 bit generation number, struct vfs_inode doesn't have a big
|
|
* enough field for this.
|
|
*/
|
|
u64 generation;
|
|
|
|
/*
|
|
* transid of the trans_handle that last modified this inode
|
|
*/
|
|
u64 last_trans;
|
|
|
|
/*
|
|
* log transid when this inode was last modified
|
|
*/
|
|
u64 last_sub_trans;
|
|
|
|
/*
|
|
* transid that last logged this inode
|
|
*/
|
|
u64 logged_trans;
|
|
|
|
/* total number of bytes pending delalloc, used by stat to calc the
|
|
* real block usage of the file
|
|
*/
|
|
u64 delalloc_bytes;
|
|
|
|
/*
|
|
* the size of the file stored in the metadata on disk. data=ordered
|
|
* means the in-memory i_size might be larger than the size on disk
|
|
* because not all the blocks are written yet.
|
|
*/
|
|
u64 disk_i_size;
|
|
|
|
/*
|
|
* if this is a directory then index_cnt is the counter for the index
|
|
* number for new files that are created
|
|
*/
|
|
u64 index_cnt;
|
|
|
|
/* the fsync log has some corner cases that mean we have to check
|
|
* directories to see if any unlinks have been done before
|
|
* the directory was logged. See tree-log.c for all the
|
|
* details
|
|
*/
|
|
u64 last_unlink_trans;
|
|
|
|
/*
|
|
* Number of bytes outstanding that are going to need csums. This is
|
|
* used in ENOSPC accounting.
|
|
*/
|
|
u64 csum_bytes;
|
|
|
|
/* flags field from the on disk inode */
|
|
u32 flags;
|
|
|
|
/* a local copy of root's last_log_commit */
|
|
unsigned long last_log_commit;
|
|
|
|
/*
|
|
* Counters to keep track of the number of extent item's we may use due
|
|
* to delalloc and such. outstanding_extents is the number of extent
|
|
* items we think we'll end up using, and reserved_extents is the number
|
|
* of extent items we've reserved metadata for.
|
|
*/
|
|
unsigned outstanding_extents;
|
|
unsigned reserved_extents;
|
|
|
|
/*
|
|
* always compress this one file
|
|
*/
|
|
unsigned force_compress;
|
|
|
|
struct btrfs_delayed_node *delayed_node;
|
|
|
|
struct inode vfs_inode;
|
|
};
|
|
|
|
extern unsigned char btrfs_filetype_table[];
|
|
|
|
static inline struct btrfs_inode *BTRFS_I(struct inode *inode)
|
|
{
|
|
return container_of(inode, struct btrfs_inode, vfs_inode);
|
|
}
|
|
|
|
static inline u64 btrfs_ino(struct inode *inode)
|
|
{
|
|
u64 ino = BTRFS_I(inode)->location.objectid;
|
|
|
|
/*
|
|
* !ino: btree_inode
|
|
* type == BTRFS_ROOT_ITEM_KEY: subvol dir
|
|
*/
|
|
if (!ino || BTRFS_I(inode)->location.type == BTRFS_ROOT_ITEM_KEY)
|
|
ino = inode->i_ino;
|
|
return ino;
|
|
}
|
|
|
|
static inline void btrfs_i_size_write(struct inode *inode, u64 size)
|
|
{
|
|
i_size_write(inode, size);
|
|
BTRFS_I(inode)->disk_i_size = size;
|
|
}
|
|
|
|
static inline bool btrfs_is_free_space_inode(struct inode *inode)
|
|
{
|
|
struct btrfs_root *root = BTRFS_I(inode)->root;
|
|
|
|
if (root == root->fs_info->tree_root &&
|
|
btrfs_ino(inode) != BTRFS_BTREE_INODE_OBJECTID)
|
|
return true;
|
|
if (BTRFS_I(inode)->location.objectid == BTRFS_FREE_INO_OBJECTID)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
static inline int btrfs_inode_in_log(struct inode *inode, u64 generation)
|
|
{
|
|
if (BTRFS_I(inode)->logged_trans == generation &&
|
|
BTRFS_I(inode)->last_sub_trans <= BTRFS_I(inode)->last_log_commit)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Disable DIO read nolock optimization, so new dio readers will be forced
|
|
* to grab i_mutex. It is used to avoid the endless truncate due to
|
|
* nonlocked dio read.
|
|
*/
|
|
static inline void btrfs_inode_block_unlocked_dio(struct inode *inode)
|
|
{
|
|
set_bit(BTRFS_INODE_READDIO_NEED_LOCK, &BTRFS_I(inode)->runtime_flags);
|
|
smp_mb();
|
|
}
|
|
|
|
static inline void btrfs_inode_resume_unlocked_dio(struct inode *inode)
|
|
{
|
|
smp_mb__before_clear_bit();
|
|
clear_bit(BTRFS_INODE_READDIO_NEED_LOCK,
|
|
&BTRFS_I(inode)->runtime_flags);
|
|
}
|
|
|
|
#endif
|