dc17ff8f11
This forces file data extents down the disk along with the metadata that references them. The current implementation is fairly simple, and just writes out all of the dirty pages in an inode before the commit. Signed-off-by: Chris Mason <chris.mason@oracle.com>
1179 lines
38 KiB
C
1179 lines
38 KiB
C
/*
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* Copyright (C) 2007 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 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 __BTRFS_CTREE__
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#define __BTRFS_CTREE__
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#include <linux/version.h>
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#include <linux/mm.h>
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#include <linux/highmem.h>
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#include <linux/fs.h>
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#include <linux/workqueue.h>
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#include <linux/completion.h>
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#include <asm/kmap_types.h>
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#include "bit-radix.h"
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#include "extent_map.h"
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struct btrfs_trans_handle;
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struct btrfs_transaction;
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extern struct kmem_cache *btrfs_trans_handle_cachep;
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extern struct kmem_cache *btrfs_transaction_cachep;
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extern struct kmem_cache *btrfs_bit_radix_cachep;
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extern struct kmem_cache *btrfs_path_cachep;
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#define BTRFS_MAGIC "_B2RfS_M"
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#define BTRFS_MAX_LEVEL 8
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#define BTRFS_ROOT_TREE_OBJECTID 1ULL
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#define BTRFS_EXTENT_TREE_OBJECTID 2ULL
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#define BTRFS_FS_TREE_OBJECTID 3ULL
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#define BTRFS_ROOT_TREE_DIR_OBJECTID 4ULL
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#define BTRFS_FIRST_FREE_OBJECTID 256ULL
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/*
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* we can actually store much bigger names, but lets not confuse the rest
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* of linux
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*/
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#define BTRFS_NAME_LEN 255
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/* 32 bytes in various csum fields */
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#define BTRFS_CSUM_SIZE 32
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/* four bytes for CRC32 */
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#define BTRFS_CRC32_SIZE 4
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#define BTRFS_EMPTY_DIR_SIZE 0
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#define BTRFS_FT_UNKNOWN 0
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#define BTRFS_FT_REG_FILE 1
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#define BTRFS_FT_DIR 2
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#define BTRFS_FT_CHRDEV 3
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#define BTRFS_FT_BLKDEV 4
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#define BTRFS_FT_FIFO 5
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#define BTRFS_FT_SOCK 6
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#define BTRFS_FT_SYMLINK 7
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#define BTRFS_FT_XATTR 8
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#define BTRFS_FT_MAX 9
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/*
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* the key defines the order in the tree, and so it also defines (optimal)
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* block layout. objectid corresonds to the inode number. The flags
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* tells us things about the object, and is a kind of stream selector.
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* so for a given inode, keys with flags of 1 might refer to the inode
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* data, flags of 2 may point to file data in the btree and flags == 3
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* may point to extents.
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*
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* offset is the starting byte offset for this key in the stream.
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*
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* btrfs_disk_key is in disk byte order. struct btrfs_key is always
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* in cpu native order. Otherwise they are identical and their sizes
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* should be the same (ie both packed)
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*/
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struct btrfs_disk_key {
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__le64 objectid;
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u8 type;
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__le64 offset;
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} __attribute__ ((__packed__));
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struct btrfs_key {
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u64 objectid;
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u8 type;
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u64 offset;
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} __attribute__ ((__packed__));
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#define BTRFS_FSID_SIZE 16
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/*
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* every tree block (leaf or node) starts with this header.
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*/
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struct btrfs_header {
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u8 csum[BTRFS_CSUM_SIZE];
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u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
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__le64 bytenr; /* which block this node is supposed to live in */
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__le64 generation;
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__le64 owner;
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__le32 nritems;
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__le16 flags;
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u8 level;
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} __attribute__ ((__packed__));
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#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
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sizeof(struct btrfs_header)) / \
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sizeof(struct btrfs_key_ptr))
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#define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
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#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
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#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
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sizeof(struct btrfs_item) - \
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sizeof(struct btrfs_file_extent_item))
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/*
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* the super block basically lists the main trees of the FS
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* it currently lacks any block count etc etc
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*/
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struct btrfs_super_block {
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u8 csum[BTRFS_CSUM_SIZE];
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/* the first 3 fields must match struct btrfs_header */
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u8 fsid[16]; /* FS specific uuid */
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__le64 bytenr; /* this block number */
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__le64 magic;
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__le64 generation;
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__le64 root;
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__le64 total_bytes;
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__le64 bytes_used;
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__le64 root_dir_objectid;
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__le32 sectorsize;
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__le32 nodesize;
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__le32 leafsize;
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__le32 stripesize;
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u8 root_level;
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} __attribute__ ((__packed__));
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/*
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* A leaf is full of items. offset and size tell us where to find
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* the item in the leaf (relative to the start of the data area)
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*/
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struct btrfs_item {
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struct btrfs_disk_key key;
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__le32 offset;
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__le32 size;
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} __attribute__ ((__packed__));
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/*
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* leaves have an item area and a data area:
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* [item0, item1....itemN] [free space] [dataN...data1, data0]
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*
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* The data is separate from the items to get the keys closer together
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* during searches.
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*/
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struct btrfs_leaf {
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struct btrfs_header header;
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struct btrfs_item items[];
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} __attribute__ ((__packed__));
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/*
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* all non-leaf blocks are nodes, they hold only keys and pointers to
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* other blocks
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*/
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struct btrfs_key_ptr {
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struct btrfs_disk_key key;
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__le64 blockptr;
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__le64 generation;
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} __attribute__ ((__packed__));
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struct btrfs_node {
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struct btrfs_header header;
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struct btrfs_key_ptr ptrs[];
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} __attribute__ ((__packed__));
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/*
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* btrfs_paths remember the path taken from the root down to the leaf.
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* level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
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* to any other levels that are present.
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*
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* The slots array records the index of the item or block pointer
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* used while walking the tree.
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*/
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struct btrfs_path {
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struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
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int slots[BTRFS_MAX_LEVEL];
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int reada;
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int lowest_level;
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};
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/*
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* items in the extent btree are used to record the objectid of the
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* owner of the block and the number of references
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*/
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struct btrfs_extent_item {
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__le32 refs;
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} __attribute__ ((__packed__));
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struct btrfs_extent_ref {
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__le64 root;
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__le64 generation;
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__le64 objectid;
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__le64 offset;
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} __attribute__ ((__packed__));
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struct btrfs_inode_ref {
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__le16 name_len;
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/* name goes here */
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} __attribute__ ((__packed__));
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struct btrfs_inode_timespec {
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__le64 sec;
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__le32 nsec;
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} __attribute__ ((__packed__));
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/*
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* there is no padding here on purpose. If you want to extent the inode,
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* make a new item type
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*/
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struct btrfs_inode_item {
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__le64 generation;
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__le64 size;
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__le64 nblocks;
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__le64 block_group;
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__le32 nlink;
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__le32 uid;
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__le32 gid;
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__le32 mode;
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__le32 rdev;
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__le16 flags;
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__le16 compat_flags;
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struct btrfs_inode_timespec atime;
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struct btrfs_inode_timespec ctime;
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struct btrfs_inode_timespec mtime;
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struct btrfs_inode_timespec otime;
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} __attribute__ ((__packed__));
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struct btrfs_dir_item {
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struct btrfs_disk_key location;
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__le16 data_len;
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__le16 name_len;
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u8 type;
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} __attribute__ ((__packed__));
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struct btrfs_root_item {
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struct btrfs_inode_item inode;
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__le64 root_dirid;
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__le64 bytenr;
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__le64 byte_limit;
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__le64 bytes_used;
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__le32 flags;
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__le32 refs;
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struct btrfs_disk_key drop_progress;
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u8 drop_level;
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u8 level;
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} __attribute__ ((__packed__));
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#define BTRFS_FILE_EXTENT_REG 0
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#define BTRFS_FILE_EXTENT_INLINE 1
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struct btrfs_file_extent_item {
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__le64 generation;
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u8 type;
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/*
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* disk space consumed by the extent, checksum blocks are included
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* in these numbers
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*/
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__le64 disk_bytenr;
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__le64 disk_num_bytes;
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/*
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* the logical offset in file blocks (no csums)
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* this extent record is for. This allows a file extent to point
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* into the middle of an existing extent on disk, sharing it
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* between two snapshots (useful if some bytes in the middle of the
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* extent have changed
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*/
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__le64 offset;
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/*
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* the logical number of file blocks (no csums included)
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*/
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__le64 num_bytes;
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} __attribute__ ((__packed__));
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struct btrfs_csum_item {
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u8 csum;
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} __attribute__ ((__packed__));
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/* tag for the radix tree of block groups in ram */
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#define BTRFS_BLOCK_GROUP_SIZE (256 * 1024 * 1024)
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#define BTRFS_BLOCK_GROUP_DATA 1
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#define BTRFS_BLOCK_GROUP_MIXED 2
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struct btrfs_block_group_item {
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__le64 used;
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u8 flags;
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} __attribute__ ((__packed__));
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struct btrfs_block_group_cache {
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struct btrfs_key key;
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struct btrfs_block_group_item item;
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int data;
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int cached;
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u64 pinned;
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};
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struct btrfs_fs_info {
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u8 fsid[BTRFS_FSID_SIZE];
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struct btrfs_root *extent_root;
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struct btrfs_root *tree_root;
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struct radix_tree_root fs_roots_radix;
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struct extent_map_tree free_space_cache;
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struct extent_map_tree block_group_cache;
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struct extent_map_tree pinned_extents;
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struct extent_map_tree pending_del;
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struct extent_map_tree extent_ins;
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u64 generation;
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u64 last_trans_committed;
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unsigned long mount_opt;
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u64 max_extent;
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u64 alloc_start;
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struct btrfs_transaction *running_transaction;
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struct btrfs_super_block super_copy;
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struct extent_buffer *sb_buffer;
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struct super_block *sb;
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struct inode *btree_inode;
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spinlock_t hash_lock;
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struct mutex trans_mutex;
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struct mutex fs_mutex;
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struct list_head trans_list;
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struct list_head hashers;
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struct list_head dead_roots;
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#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
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struct work_struct trans_work;
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#else
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struct delayed_work trans_work;
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#endif
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struct kobject super_kobj;
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struct completion kobj_unregister;
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int do_barriers;
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int closing;
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u64 total_pinned;
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spinlock_t delalloc_lock;
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u64 delalloc_bytes;
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};
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/*
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* in ram representation of the tree. extent_root is used for all allocations
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* and for the extent tree extent_root root.
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*/
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struct btrfs_root {
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struct extent_buffer *node;
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struct extent_buffer *commit_root;
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struct btrfs_root_item root_item;
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struct btrfs_key root_key;
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struct btrfs_fs_info *fs_info;
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struct inode *inode;
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struct kobject root_kobj;
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struct completion kobj_unregister;
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u64 objectid;
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u64 last_trans;
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/* data allocations are done in sectorsize units */
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u32 sectorsize;
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/* node allocations are done in nodesize units */
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u32 nodesize;
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/* leaf allocations are done in leafsize units */
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u32 leafsize;
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u32 stripesize;
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u32 type;
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u64 highest_inode;
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u64 last_inode_alloc;
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int ref_cows;
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struct btrfs_key defrag_progress;
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int defrag_running;
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int defrag_level;
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char *name;
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int in_sysfs;
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};
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/*
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* inode items have the data typically returned from stat and store other
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* info about object characteristics. There is one for every file and dir in
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* the FS
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*/
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#define BTRFS_INODE_ITEM_KEY 1
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#define BTRFS_INODE_REF_KEY 2
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#define BTRFS_XATTR_ITEM_KEY 8
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/* reserve 2-15 close to the inode for later flexibility */
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/*
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* dir items are the name -> inode pointers in a directory. There is one
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* for every name in a directory.
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*/
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#define BTRFS_DIR_ITEM_KEY 16
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#define BTRFS_DIR_INDEX_KEY 17
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/*
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* extent data is for file data
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*/
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#define BTRFS_EXTENT_DATA_KEY 18
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/*
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* csum items have the checksums for data in the extents
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*/
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#define BTRFS_CSUM_ITEM_KEY 19
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/* reserve 20-31 for other file stuff */
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/*
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* root items point to tree roots. There are typically in the root
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* tree used by the super block to find all the other trees
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*/
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#define BTRFS_ROOT_ITEM_KEY 32
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/*
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* extent items are in the extent map tree. These record which blocks
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* are used, and how many references there are to each block
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*/
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#define BTRFS_EXTENT_ITEM_KEY 33
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#define BTRFS_EXTENT_REF_KEY 34
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/*
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* block groups give us hints into the extent allocation trees. Which
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* blocks are free etc etc
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*/
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#define BTRFS_BLOCK_GROUP_ITEM_KEY 50
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/*
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* string items are for debugging. They just store a short string of
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* data in the FS
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*/
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#define BTRFS_STRING_ITEM_KEY 253
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#define BTRFS_MOUNT_NODATASUM 0x1
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#define BTRFS_MOUNT_NODATACOW 0x2
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#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
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#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
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#define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
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BTRFS_MOUNT_##opt)
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/* some macros to generate set/get funcs for the struct fields. This
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* assumes there is a lefoo_to_cpu for every type, so lets make a simple
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* one for u8:
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*/
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#define le8_to_cpu(v) (v)
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#define cpu_to_le8(v) (v)
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#define __le8 u8
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#define read_eb_member(eb, ptr, type, member, result) ( \
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read_extent_buffer(eb, (char *)(result), \
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((unsigned long)(ptr)) + \
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offsetof(type, member), \
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sizeof(((type *)0)->member)))
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#define write_eb_member(eb, ptr, type, member, result) ( \
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write_extent_buffer(eb, (char *)(result), \
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((unsigned long)(ptr)) + \
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offsetof(type, member), \
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sizeof(((type *)0)->member)))
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#ifndef BTRFS_SETGET_FUNCS
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#define BTRFS_SETGET_FUNCS(name, type, member, bits) \
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u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
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void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
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#endif
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#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
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static inline u##bits btrfs_##name(struct extent_buffer *eb) \
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{ \
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char *kaddr = kmap_atomic(eb->first_page, KM_USER0); \
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unsigned long offset = offsetof(type, member); \
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u##bits res; \
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__le##bits *tmp = (__le##bits *)(kaddr + offset); \
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res = le##bits##_to_cpu(*tmp); \
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kunmap_atomic(kaddr, KM_USER0); \
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return res; \
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} \
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static inline void btrfs_set_##name(struct extent_buffer *eb, \
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u##bits val) \
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{ \
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char *kaddr = kmap_atomic(eb->first_page, KM_USER0); \
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unsigned long offset = offsetof(type, member); \
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__le##bits *tmp = (__le##bits *)(kaddr + offset); \
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*tmp = cpu_to_le##bits(val); \
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kunmap_atomic(kaddr, KM_USER0); \
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}
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#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
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static inline u##bits btrfs_##name(type *s) \
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{ \
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return le##bits##_to_cpu(s->member); \
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} \
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static inline void btrfs_set_##name(type *s, u##bits val) \
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{ \
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s->member = cpu_to_le##bits(val); \
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}
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/* struct btrfs_block_group_item */
|
|
BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
|
|
used, 64);
|
|
BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
|
|
used, 64);
|
|
BTRFS_SETGET_FUNCS(disk_block_group_flags, struct btrfs_block_group_item,
|
|
flags, 8);
|
|
|
|
/* struct btrfs_inode_ref */
|
|
BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
|
|
|
|
/* struct btrfs_inode_item */
|
|
BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
|
|
BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
|
|
BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
|
|
BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
|
|
BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
|
|
BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
|
|
BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
|
|
BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
|
|
BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 32);
|
|
BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
|
|
BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
|
|
compat_flags, 16);
|
|
|
|
static inline struct btrfs_inode_timespec *
|
|
btrfs_inode_atime(struct btrfs_inode_item *inode_item)
|
|
{
|
|
unsigned long ptr = (unsigned long)inode_item;
|
|
ptr += offsetof(struct btrfs_inode_item, atime);
|
|
return (struct btrfs_inode_timespec *)ptr;
|
|
}
|
|
|
|
static inline struct btrfs_inode_timespec *
|
|
btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
|
|
{
|
|
unsigned long ptr = (unsigned long)inode_item;
|
|
ptr += offsetof(struct btrfs_inode_item, mtime);
|
|
return (struct btrfs_inode_timespec *)ptr;
|
|
}
|
|
|
|
static inline struct btrfs_inode_timespec *
|
|
btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
|
|
{
|
|
unsigned long ptr = (unsigned long)inode_item;
|
|
ptr += offsetof(struct btrfs_inode_item, ctime);
|
|
return (struct btrfs_inode_timespec *)ptr;
|
|
}
|
|
|
|
static inline struct btrfs_inode_timespec *
|
|
btrfs_inode_otime(struct btrfs_inode_item *inode_item)
|
|
{
|
|
unsigned long ptr = (unsigned long)inode_item;
|
|
ptr += offsetof(struct btrfs_inode_item, otime);
|
|
return (struct btrfs_inode_timespec *)ptr;
|
|
}
|
|
|
|
BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_inode_timespec, sec, 64);
|
|
BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_inode_timespec, nsec, 32);
|
|
|
|
/* struct btrfs_extent_item */
|
|
BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
|
|
|
|
/* struct btrfs_extent_ref */
|
|
BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
|
|
BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
|
|
BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
|
|
BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
|
|
|
|
BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
|
|
generation, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
|
|
objectid, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
|
|
|
|
BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
|
|
refs, 32);
|
|
|
|
/* struct btrfs_node */
|
|
BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
|
|
BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
|
|
|
|
static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
|
|
{
|
|
unsigned long ptr;
|
|
ptr = offsetof(struct btrfs_node, ptrs) +
|
|
sizeof(struct btrfs_key_ptr) * nr;
|
|
return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
|
|
}
|
|
|
|
static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
|
|
int nr, u64 val)
|
|
{
|
|
unsigned long ptr;
|
|
ptr = offsetof(struct btrfs_node, ptrs) +
|
|
sizeof(struct btrfs_key_ptr) * nr;
|
|
btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
|
|
}
|
|
|
|
static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
|
|
{
|
|
unsigned long ptr;
|
|
ptr = offsetof(struct btrfs_node, ptrs) +
|
|
sizeof(struct btrfs_key_ptr) * nr;
|
|
return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
|
|
}
|
|
|
|
static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
|
|
int nr, u64 val)
|
|
{
|
|
unsigned long ptr;
|
|
ptr = offsetof(struct btrfs_node, ptrs) +
|
|
sizeof(struct btrfs_key_ptr) * nr;
|
|
btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
|
|
}
|
|
|
|
static inline unsigned long btrfs_node_key_ptr_offset(int nr)
|
|
{
|
|
return offsetof(struct btrfs_node, ptrs) +
|
|
sizeof(struct btrfs_key_ptr) * nr;
|
|
}
|
|
|
|
void btrfs_node_key(struct extent_buffer *eb,
|
|
struct btrfs_disk_key *disk_key, int nr);
|
|
|
|
static inline void btrfs_set_node_key(struct extent_buffer *eb,
|
|
struct btrfs_disk_key *disk_key, int nr)
|
|
{
|
|
unsigned long ptr;
|
|
ptr = btrfs_node_key_ptr_offset(nr);
|
|
write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
|
|
struct btrfs_key_ptr, key, disk_key);
|
|
}
|
|
|
|
/* struct btrfs_item */
|
|
BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
|
|
BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
|
|
|
|
static inline unsigned long btrfs_item_nr_offset(int nr)
|
|
{
|
|
return offsetof(struct btrfs_leaf, items) +
|
|
sizeof(struct btrfs_item) * nr;
|
|
}
|
|
|
|
static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
|
|
int nr)
|
|
{
|
|
return (struct btrfs_item *)btrfs_item_nr_offset(nr);
|
|
}
|
|
|
|
static inline u32 btrfs_item_end(struct extent_buffer *eb,
|
|
struct btrfs_item *item)
|
|
{
|
|
return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
|
|
}
|
|
|
|
static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
|
|
{
|
|
return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
|
|
}
|
|
|
|
static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
|
|
{
|
|
return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
|
|
}
|
|
|
|
static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
|
|
{
|
|
return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
|
|
}
|
|
|
|
static inline void btrfs_item_key(struct extent_buffer *eb,
|
|
struct btrfs_disk_key *disk_key, int nr)
|
|
{
|
|
struct btrfs_item *item = btrfs_item_nr(eb, nr);
|
|
read_eb_member(eb, item, struct btrfs_item, key, disk_key);
|
|
}
|
|
|
|
static inline void btrfs_set_item_key(struct extent_buffer *eb,
|
|
struct btrfs_disk_key *disk_key, int nr)
|
|
{
|
|
struct btrfs_item *item = btrfs_item_nr(eb, nr);
|
|
write_eb_member(eb, item, struct btrfs_item, key, disk_key);
|
|
}
|
|
|
|
/* struct btrfs_dir_item */
|
|
BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
|
|
BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
|
|
BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
|
|
|
|
static inline void btrfs_dir_item_key(struct extent_buffer *eb,
|
|
struct btrfs_dir_item *item,
|
|
struct btrfs_disk_key *key)
|
|
{
|
|
read_eb_member(eb, item, struct btrfs_dir_item, location, key);
|
|
}
|
|
|
|
static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
|
|
struct btrfs_dir_item *item,
|
|
struct btrfs_disk_key *key)
|
|
{
|
|
write_eb_member(eb, item, struct btrfs_dir_item, location, key);
|
|
}
|
|
|
|
/* struct btrfs_disk_key */
|
|
BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
|
|
objectid, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
|
|
|
|
static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
|
|
struct btrfs_disk_key *disk)
|
|
{
|
|
cpu->offset = le64_to_cpu(disk->offset);
|
|
cpu->type = disk->type;
|
|
cpu->objectid = le64_to_cpu(disk->objectid);
|
|
}
|
|
|
|
static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
|
|
struct btrfs_key *cpu)
|
|
{
|
|
disk->offset = cpu_to_le64(cpu->offset);
|
|
disk->type = cpu->type;
|
|
disk->objectid = cpu_to_le64(cpu->objectid);
|
|
}
|
|
|
|
static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
|
|
struct btrfs_key *key, int nr)
|
|
{
|
|
struct btrfs_disk_key disk_key;
|
|
btrfs_node_key(eb, &disk_key, nr);
|
|
btrfs_disk_key_to_cpu(key, &disk_key);
|
|
}
|
|
|
|
static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
|
|
struct btrfs_key *key, int nr)
|
|
{
|
|
struct btrfs_disk_key disk_key;
|
|
btrfs_item_key(eb, &disk_key, nr);
|
|
btrfs_disk_key_to_cpu(key, &disk_key);
|
|
}
|
|
|
|
static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
|
|
struct btrfs_dir_item *item,
|
|
struct btrfs_key *key)
|
|
{
|
|
struct btrfs_disk_key disk_key;
|
|
btrfs_dir_item_key(eb, item, &disk_key);
|
|
btrfs_disk_key_to_cpu(key, &disk_key);
|
|
}
|
|
|
|
|
|
static inline u8 btrfs_key_type(struct btrfs_key *key)
|
|
{
|
|
return key->type;
|
|
}
|
|
|
|
static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
|
|
{
|
|
key->type = val;
|
|
}
|
|
|
|
/* struct btrfs_header */
|
|
BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
|
|
BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
|
|
generation, 64);
|
|
BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
|
|
BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
|
|
BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 16);
|
|
BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
|
|
|
|
static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
|
|
{
|
|
unsigned long ptr = offsetof(struct btrfs_header, fsid);
|
|
return (u8 *)ptr;
|
|
}
|
|
|
|
static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
|
|
{
|
|
unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
|
|
return (u8 *)ptr;
|
|
}
|
|
|
|
static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
|
|
{
|
|
unsigned long ptr = offsetof(struct btrfs_header, csum);
|
|
return (u8 *)ptr;
|
|
}
|
|
|
|
static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline int btrfs_is_leaf(struct extent_buffer *eb)
|
|
{
|
|
return (btrfs_header_level(eb) == 0);
|
|
}
|
|
|
|
/* struct btrfs_root_item */
|
|
BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
|
|
BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
|
|
BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
|
|
|
|
BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
|
|
BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
|
|
BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
|
|
BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
|
|
|
|
/* struct btrfs_super_block */
|
|
BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
|
|
generation, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
|
|
root_level, 8);
|
|
BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
|
|
total_bytes, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
|
|
bytes_used, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
|
|
sectorsize, 32);
|
|
BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
|
|
nodesize, 32);
|
|
BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
|
|
leafsize, 32);
|
|
BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
|
|
stripesize, 32);
|
|
BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
|
|
root_dir_objectid, 64);
|
|
|
|
static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
|
|
{
|
|
return offsetof(struct btrfs_leaf, items);
|
|
}
|
|
|
|
/* struct btrfs_file_extent_item */
|
|
BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
|
|
|
|
static inline unsigned long btrfs_file_extent_inline_start(struct
|
|
btrfs_file_extent_item *e)
|
|
{
|
|
unsigned long offset = (unsigned long)e;
|
|
offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
|
|
return offset;
|
|
}
|
|
|
|
static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
|
|
{
|
|
return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
|
|
}
|
|
|
|
static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
|
|
struct btrfs_item *e)
|
|
{
|
|
unsigned long offset;
|
|
offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
|
|
return btrfs_item_size(eb, e) - offset;
|
|
}
|
|
|
|
BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
|
|
disk_bytenr, 64);
|
|
BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
|
|
generation, 64);
|
|
BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
|
|
disk_num_bytes, 64);
|
|
BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
|
|
offset, 64);
|
|
BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
|
|
num_bytes, 64);
|
|
|
|
static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
|
|
{
|
|
return sb->s_fs_info;
|
|
}
|
|
|
|
static inline int btrfs_set_root_name(struct btrfs_root *root,
|
|
const char *name, int len)
|
|
{
|
|
/* if we already have a name just free it */
|
|
if (root->name)
|
|
kfree(root->name);
|
|
|
|
root->name = kmalloc(len+1, GFP_KERNEL);
|
|
if (!root->name)
|
|
return -ENOMEM;
|
|
|
|
memcpy(root->name, name, len);
|
|
root->name[len] ='\0';
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
|
|
if (level == 0)
|
|
return root->leafsize;
|
|
return root->nodesize;
|
|
}
|
|
|
|
/* helper function to cast into the data area of the leaf. */
|
|
#define btrfs_item_ptr(leaf, slot, type) \
|
|
((type *)(btrfs_leaf_data(leaf) + \
|
|
btrfs_item_offset_nr(leaf, slot)))
|
|
|
|
#define btrfs_item_ptr_offset(leaf, slot) \
|
|
((unsigned long)(btrfs_leaf_data(leaf) + \
|
|
btrfs_item_offset_nr(leaf, slot)))
|
|
|
|
static inline struct dentry *fdentry(struct file *file) {
|
|
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
|
|
return file->f_dentry;
|
|
#else
|
|
return file->f_path.dentry;
|
|
#endif
|
|
}
|
|
|
|
/* extent-tree.c */
|
|
u32 btrfs_count_snapshots_in_path(struct btrfs_root *root,
|
|
struct btrfs_path *count_path,
|
|
u64 first_extent);
|
|
int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root);
|
|
int btrfs_copy_pinned(struct btrfs_root *root, struct extent_map_tree *copy);
|
|
struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
|
|
btrfs_fs_info *info,
|
|
u64 bytenr);
|
|
struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
|
|
struct btrfs_block_group_cache
|
|
*hint, u64 search_start,
|
|
int data, int owner);
|
|
int btrfs_inc_root_ref(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, u64 owner_objectid);
|
|
struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, u32 size,
|
|
u64 root_objectid,
|
|
u64 hint, u64 empty_size);
|
|
struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
u32 blocksize,
|
|
u64 root_objectid,
|
|
u64 ref_generation,
|
|
u64 first_objectid,
|
|
int level,
|
|
u64 hint,
|
|
u64 empty_size);
|
|
int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, u64 new_size);
|
|
int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
|
|
int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path, u64 bytenr,
|
|
u64 root_objectid, u64 ref_generation,
|
|
u64 owner, u64 owner_offset);
|
|
int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
u64 num_bytes, u64 root_objectid, u64 ref_generation,
|
|
u64 owner, u64 owner_offset,
|
|
u64 empty_size, u64 hint_byte,
|
|
u64 search_end, struct btrfs_key *ins, int data);
|
|
int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
|
|
struct extent_buffer *buf);
|
|
int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
|
|
*root, u64 bytenr, u64 num_bytes,
|
|
u64 root_objectid, u64 ref_generation,
|
|
u64 owner_objectid, u64 owner_offset, int pin);
|
|
int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct extent_map_tree *unpin);
|
|
int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
u64 bytenr, u64 num_bytes,
|
|
u64 root_objectid, u64 ref_generation,
|
|
u64 owner, u64 owner_offset);
|
|
int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root);
|
|
int btrfs_free_block_groups(struct btrfs_fs_info *info);
|
|
int btrfs_read_block_groups(struct btrfs_root *root);
|
|
/* ctree.c */
|
|
int btrfs_cow_block(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, struct extent_buffer *buf,
|
|
struct extent_buffer *parent, int parent_slot,
|
|
struct extent_buffer **cow_ret);
|
|
int btrfs_copy_root(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct extent_buffer *buf,
|
|
struct extent_buffer **cow_ret, u64 new_root_objectid);
|
|
int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
|
|
*root, struct btrfs_path *path, u32 data_size);
|
|
int btrfs_truncate_item(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path,
|
|
u32 new_size, int from_end);
|
|
int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
|
|
*root, struct btrfs_key *key, struct btrfs_path *p, int
|
|
ins_len, int cow);
|
|
int btrfs_realloc_node(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, struct extent_buffer *parent,
|
|
int start_slot, int cache_only, u64 *last_ret,
|
|
struct btrfs_key *progress);
|
|
void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
|
|
struct btrfs_path *btrfs_alloc_path(void);
|
|
void btrfs_free_path(struct btrfs_path *p);
|
|
void btrfs_init_path(struct btrfs_path *p);
|
|
int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
|
|
struct btrfs_path *path);
|
|
int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
|
|
*root, struct btrfs_key *key, void *data, u32 data_size);
|
|
int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, struct btrfs_root
|
|
*root, struct btrfs_path *path, struct btrfs_key
|
|
*cpu_key, u32 data_size);
|
|
int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
|
|
int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
|
|
int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
|
|
int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
|
|
*root);
|
|
/* root-item.c */
|
|
int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
|
|
struct btrfs_key *key);
|
|
int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
|
|
*root, struct btrfs_key *key, struct btrfs_root_item
|
|
*item);
|
|
int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
|
|
*root, struct btrfs_key *key, struct btrfs_root_item
|
|
*item);
|
|
int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
|
|
btrfs_root_item *item, struct btrfs_key *key);
|
|
int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
|
|
struct btrfs_root *latest_root);
|
|
/* dir-item.c */
|
|
int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
|
|
*root, const char *name, int name_len, u64 dir,
|
|
struct btrfs_key *location, u8 type);
|
|
struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path, u64 dir,
|
|
const char *name, int name_len,
|
|
int mod);
|
|
struct btrfs_dir_item *
|
|
btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path, u64 dir,
|
|
u64 objectid, const char *name, int name_len,
|
|
int mod);
|
|
struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
|
|
struct btrfs_path *path,
|
|
const char *name, int name_len);
|
|
int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path,
|
|
struct btrfs_dir_item *di);
|
|
int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, const char *name,
|
|
u16 name_len, const void *data, u16 data_len,
|
|
u64 dir);
|
|
struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path, u64 dir,
|
|
const char *name, u16 name_len,
|
|
int mod);
|
|
/* inode-map.c */
|
|
int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *fs_root,
|
|
u64 dirid, u64 *objectid);
|
|
int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
|
|
|
|
/* inode-item.c */
|
|
int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
const char *name, int name_len,
|
|
u64 inode_objectid, u64 ref_objectid);
|
|
int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
const char *name, int name_len,
|
|
u64 inode_objectid, u64 ref_objectid);
|
|
int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path, u64 objectid);
|
|
int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
|
|
*root, struct btrfs_path *path,
|
|
struct btrfs_key *location, int mod);
|
|
|
|
/* file-item.c */
|
|
int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
u64 objectid, u64 pos, u64 offset,
|
|
u64 disk_num_bytes,
|
|
u64 num_bytes);
|
|
int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path, u64 objectid,
|
|
u64 bytenr, int mod);
|
|
int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct inode *inode,
|
|
u64 objectid, u64 offset,
|
|
char *data, size_t len);
|
|
struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path,
|
|
u64 objectid, u64 offset,
|
|
int cow);
|
|
int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, struct btrfs_path *path,
|
|
u64 isize);
|
|
/* inode.c */
|
|
unsigned long btrfs_force_ra(struct address_space *mapping,
|
|
struct file_ra_state *ra, struct file *file,
|
|
pgoff_t offset, pgoff_t last_index);
|
|
int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
|
|
int for_del);
|
|
int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
|
|
int btrfs_readpage(struct file *file, struct page *page);
|
|
void btrfs_delete_inode(struct inode *inode);
|
|
void btrfs_read_locked_inode(struct inode *inode);
|
|
int btrfs_write_inode(struct inode *inode, int wait);
|
|
void btrfs_dirty_inode(struct inode *inode);
|
|
struct inode *btrfs_alloc_inode(struct super_block *sb);
|
|
void btrfs_destroy_inode(struct inode *inode);
|
|
int btrfs_init_cachep(void);
|
|
void btrfs_destroy_cachep(void);
|
|
long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
|
|
struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
|
|
struct btrfs_root *root);
|
|
struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
|
|
u64 root_objectid);
|
|
int btrfs_commit_write(struct file *file, struct page *page,
|
|
unsigned from, unsigned to);
|
|
struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
|
|
size_t page_offset, u64 start, u64 end,
|
|
int create);
|
|
int btrfs_update_inode(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct inode *inode);
|
|
/* file.c */
|
|
int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
|
|
extern struct file_operations btrfs_file_operations;
|
|
int btrfs_drop_extents(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, struct inode *inode,
|
|
u64 start, u64 end, u64 inline_limit, u64 *hint_block);
|
|
/* tree-defrag.c */
|
|
int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, int cache_only);
|
|
|
|
/* sysfs.c */
|
|
int btrfs_init_sysfs(void);
|
|
void btrfs_exit_sysfs(void);
|
|
int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
|
|
int btrfs_sysfs_add_root(struct btrfs_root *root);
|
|
void btrfs_sysfs_del_root(struct btrfs_root *root);
|
|
void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
|
|
|
|
/* xattr.c */
|
|
ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
|
|
int btrfs_delete_xattrs(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, struct inode *inode);
|
|
/* super.c */
|
|
u64 btrfs_parse_size(char *str);
|
|
#endif
|