-#ifndef __CTREE__
-#define __CTREE__
+/*
+ * 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.
+ */
-#define CTREE_BLOCKSIZE 256
+#ifndef __BTRFS__
+#define __BTRFS__
-struct key {
+#include <linux/fs.h>
+#include <linux/buffer_head.h>
+#include <linux/workqueue.h>
+#include "bit-radix.h"
+
+struct btrfs_trans_handle;
+struct btrfs_transaction;
+extern struct kmem_cache *btrfs_trans_handle_cachep;
+extern struct kmem_cache *btrfs_transaction_cachep;
+extern struct kmem_cache *btrfs_bit_radix_cachep;
+extern struct kmem_cache *btrfs_path_cachep;
+
+#define BTRFS_MAGIC "_BtRfS_M"
+
+#define BTRFS_ROOT_TREE_OBJECTID 1ULL
+#define BTRFS_EXTENT_TREE_OBJECTID 2ULL
+#define BTRFS_FS_TREE_OBJECTID 3ULL
+#define BTRFS_ROOT_TREE_DIR_OBJECTID 4ULL
+#define BTRFS_FIRST_FREE_OBJECTID 5ULL
+
+/*
+ * we can actually store much bigger names, but lets not confuse the rest
+ * of linux
+ */
+#define BTRFS_NAME_LEN 255
+
+/* 32 bytes in various csum fields */
+#define BTRFS_CSUM_SIZE 32
+/* four bytes for CRC32 */
+#define BTRFS_CRC32_SIZE 4
+#define BTRFS_EMPTY_DIR_SIZE 6
+
+#define BTRFS_FT_UNKNOWN 0
+#define BTRFS_FT_REG_FILE 1
+#define BTRFS_FT_DIR 2
+#define BTRFS_FT_CHRDEV 3
+#define BTRFS_FT_BLKDEV 4
+#define BTRFS_FT_FIFO 5
+#define BTRFS_FT_SOCK 6
+#define BTRFS_FT_SYMLINK 7
+#define BTRFS_FT_MAX 8
+
+/*
+ * the key defines the order in the tree, and so it also defines (optimal)
+ * block layout. objectid corresonds to the inode number. The flags
+ * tells us things about the object, and is a kind of stream selector.
+ * so for a given inode, keys with flags of 1 might refer to the inode
+ * data, flags of 2 may point to file data in the btree and flags == 3
+ * may point to extents.
+ *
+ * offset is the starting byte offset for this key in the stream.
+ *
+ * btrfs_disk_key is in disk byte order. struct btrfs_key is always
+ * in cpu native order. Otherwise they are identical and their sizes
+ * should be the same (ie both packed)
+ */
+struct btrfs_disk_key {
+ __le64 objectid;
+ __le32 flags;
+ __le64 offset;
+} __attribute__ ((__packed__));
+
+struct btrfs_key {
u64 objectid;
u32 flags;
u64 offset;
} __attribute__ ((__packed__));
-struct header {
- u64 fsid[2]; /* FS specific uuid */
- u64 blocknr;
- u64 parentid;
- u32 csum;
- u32 ham;
- u16 nritems;
- u16 flags;
+/*
+ * every tree block (leaf or node) starts with this header.
+ */
+struct btrfs_header {
+ u8 csum[BTRFS_CSUM_SIZE];
+ u8 fsid[16]; /* FS specific uuid */
+ __le64 blocknr; /* which block this node is supposed to live in */
+ __le64 generation;
+ __le64 owner;
+ __le16 nritems;
+ __le16 flags;
+ u8 level;
+} __attribute__ ((__packed__));
+
+#define BTRFS_MAX_LEVEL 8
+#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->blocksize - \
+ sizeof(struct btrfs_header)) / \
+ (sizeof(struct btrfs_disk_key) + sizeof(u64)))
+#define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
+#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->blocksize))
+#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
+ sizeof(struct btrfs_item) - \
+ sizeof(struct btrfs_file_extent_item))
+
+struct buffer_head;
+/*
+ * the super block basically lists the main trees of the FS
+ * it currently lacks any block count etc etc
+ */
+struct btrfs_super_block {
+ u8 csum[BTRFS_CSUM_SIZE];
+ /* the first 3 fields must match struct btrfs_header */
+ u8 fsid[16]; /* FS specific uuid */
+ __le64 blocknr; /* this block number */
+ __le64 magic;
+ __le32 blocksize;
+ __le64 generation;
+ __le64 root;
+ __le64 total_blocks;
+ __le64 blocks_used;
+ __le64 root_dir_objectid;
} __attribute__ ((__packed__));
-#define NODEPTRS_PER_BLOCK ((CTREE_BLOCKSIZE - sizeof(struct header)) / \
- (sizeof(struct key) + sizeof(u64)))
+/*
+ * A leaf is full of items. offset and size tell us where to find
+ * the item in the leaf (relative to the start of the data area)
+ */
+struct btrfs_item {
+ struct btrfs_disk_key key;
+ __le32 offset;
+ __le16 size;
+} __attribute__ ((__packed__));
-#define MAX_LEVEL 8
-#define node_level(f) ((f) & (MAX_LEVEL-1))
-#define is_leaf(f) (node_level(f) == 0)
+/*
+ * leaves have an item area and a data area:
+ * [item0, item1....itemN] [free space] [dataN...data1, data0]
+ *
+ * The data is separate from the items to get the keys closer together
+ * during searches.
+ */
+struct btrfs_leaf {
+ struct btrfs_header header;
+ struct btrfs_item items[];
+} __attribute__ ((__packed__));
-struct tree_buffer;
+/*
+ * all non-leaf blocks are nodes, they hold only keys and pointers to
+ * other blocks
+ */
+struct btrfs_key_ptr {
+ struct btrfs_disk_key key;
+ __le64 blockptr;
+} __attribute__ ((__packed__));
-struct alloc_extent {
- u64 blocknr;
- u64 num_blocks;
- u64 num_used;
+struct btrfs_node {
+ struct btrfs_header header;
+ struct btrfs_key_ptr ptrs[];
} __attribute__ ((__packed__));
-struct ctree_root {
- struct tree_buffer *node;
- struct ctree_root *extent_root;
- struct alloc_extent *alloc_extent;
- struct alloc_extent *reserve_extent;
- int fp;
- struct radix_tree_root cache_radix;
- struct alloc_extent ai1;
- struct alloc_extent ai2;
+/*
+ * btrfs_paths remember the path taken from the root down to the leaf.
+ * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
+ * to any other levels that are present.
+ *
+ * The slots array records the index of the item or block pointer
+ * used while walking the tree.
+ */
+struct btrfs_path {
+ struct buffer_head *nodes[BTRFS_MAX_LEVEL];
+ int slots[BTRFS_MAX_LEVEL];
};
-struct ctree_root_info {
- u64 fsid[2]; /* FS specific uuid */
- u64 blocknr; /* blocknr of this block */
- u64 objectid; /* inode number of this root */
- u64 tree_root; /* the tree root */
- u32 csum;
- u32 ham;
- struct alloc_extent alloc_extent;
- struct alloc_extent reserve_extent;
- u64 snapuuid[2]; /* root specific uuid */
+/*
+ * items in the extent btree are used to record the objectid of the
+ * owner of the block and the number of references
+ */
+struct btrfs_extent_item {
+ __le32 refs;
+ __le64 owner;
} __attribute__ ((__packed__));
-struct ctree_super_block {
- struct ctree_root_info root_info;
- struct ctree_root_info extent_info;
+struct btrfs_inode_timespec {
+ __le64 sec;
+ __le32 nsec;
} __attribute__ ((__packed__));
-struct item {
- struct key key;
- u16 offset;
- u16 size;
+/*
+ * there is no padding here on purpose. If you want to extent the inode,
+ * make a new item type
+ */
+struct btrfs_inode_item {
+ __le64 generation;
+ __le64 size;
+ __le64 nblocks;
+ __le64 block_group;
+ __le32 nlink;
+ __le32 uid;
+ __le32 gid;
+ __le32 mode;
+ __le32 rdev;
+ __le16 flags;
+ __le16 compat_flags;
+ struct btrfs_inode_timespec atime;
+ struct btrfs_inode_timespec ctime;
+ struct btrfs_inode_timespec mtime;
+ struct btrfs_inode_timespec otime;
} __attribute__ ((__packed__));
-#define LEAF_DATA_SIZE (CTREE_BLOCKSIZE - sizeof(struct header))
-struct leaf {
- struct header header;
- union {
- struct item items[LEAF_DATA_SIZE/sizeof(struct item)];
- u8 data[CTREE_BLOCKSIZE-sizeof(struct header)];
- };
+struct btrfs_dir_item {
+ struct btrfs_disk_key location;
+ __le16 flags;
+ __le16 name_len;
+ u8 type;
} __attribute__ ((__packed__));
-struct node {
- struct header header;
- struct key keys[NODEPTRS_PER_BLOCK];
- u64 blockptrs[NODEPTRS_PER_BLOCK];
+struct btrfs_root_item {
+ struct btrfs_inode_item inode;
+ __le64 root_dirid;
+ __le64 blocknr;
+ __le32 flags;
+ __le64 block_limit;
+ __le64 blocks_used;
+ __le32 refs;
} __attribute__ ((__packed__));
-struct extent_item {
- u32 refs;
- u64 owner;
+#define BTRFS_FILE_EXTENT_REG 0
+#define BTRFS_FILE_EXTENT_INLINE 1
+
+struct btrfs_file_extent_item {
+ __le64 generation;
+ u8 type;
+ /*
+ * disk space consumed by the extent, checksum blocks are included
+ * in these numbers
+ */
+ __le64 disk_blocknr;
+ __le64 disk_num_blocks;
+ /*
+ * the logical offset in file blocks (no csums)
+ * this extent record is for. This allows a file extent to point
+ * into the middle of an existing extent on disk, sharing it
+ * between two snapshots (useful if some bytes in the middle of the
+ * extent have changed
+ */
+ __le64 offset;
+ /*
+ * the logical number of file blocks (no csums included)
+ */
+ __le64 num_blocks;
+} __attribute__ ((__packed__));
+
+struct btrfs_csum_item {
+ u8 csum;
} __attribute__ ((__packed__));
-struct ctree_path {
- struct tree_buffer *nodes[MAX_LEVEL];
- int slots[MAX_LEVEL];
+/* tag for the radix tree of block groups in ram */
+#define BTRFS_BLOCK_GROUP_DIRTY 0
+#define BTRFS_BLOCK_GROUP_AVAIL 1
+#define BTRFS_BLOCK_GROUP_SIZE (256 * 1024 * 1024)
+
+
+#define BTRFS_BLOCK_GROUP_DATA 1
+struct btrfs_block_group_item {
+ __le64 used;
+ u8 flags;
+} __attribute__ ((__packed__));
+
+struct btrfs_block_group_cache {
+ struct btrfs_key key;
+ struct btrfs_block_group_item item;
+ struct radix_tree_root *radix;
+ u64 first_free;
+ u64 last_alloc;
+ u64 pinned;
+ u64 last_prealloc;
+ int data;
+ int cached;
+};
+
+struct btrfs_fs_info {
+ struct btrfs_root *extent_root;
+ struct btrfs_root *tree_root;
+ struct radix_tree_root fs_roots_radix;
+ struct radix_tree_root pending_del_radix;
+ struct radix_tree_root pinned_radix;
+ struct radix_tree_root block_group_radix;
+ struct radix_tree_root block_group_data_radix;
+ struct radix_tree_root extent_map_radix;
+
+ u64 extent_tree_insert[BTRFS_MAX_LEVEL * 3];
+ int extent_tree_insert_nr;
+ u64 extent_tree_prealloc[BTRFS_MAX_LEVEL * 3];
+ int extent_tree_prealloc_nr;
+
+ u64 generation;
+ struct btrfs_transaction *running_transaction;
+ struct btrfs_super_block *disk_super;
+ struct buffer_head *sb_buffer;
+ struct super_block *sb;
+ struct inode *btree_inode;
+ struct mutex trans_mutex;
+ struct mutex fs_mutex;
+ struct list_head trans_list;
+ struct list_head dead_roots;
+ struct delayed_work trans_work;
+ int do_barriers;
+ int closing;
};
+
+/*
+ * in ram representation of the tree. extent_root is used for all allocations
+ * and for the extent tree extent_root root.
+ */
+struct btrfs_root {
+ struct buffer_head *node;
+ struct buffer_head *commit_root;
+ struct btrfs_root_item root_item;
+ struct btrfs_key root_key;
+ struct btrfs_fs_info *fs_info;
+ struct inode *inode;
+ u64 objectid;
+ u64 last_trans;
+ u32 blocksize;
+ int ref_cows;
+ u32 type;
+ u64 highest_inode;
+ u64 last_inode_alloc;
+};
+
+/* the lower bits in the key flags defines the item type */
+#define BTRFS_KEY_TYPE_MAX 256
+#define BTRFS_KEY_TYPE_SHIFT 24
+#define BTRFS_KEY_TYPE_MASK (((u32)BTRFS_KEY_TYPE_MAX - 1) << \
+ BTRFS_KEY_TYPE_SHIFT)
+
+/*
+ * inode items have the data typically returned from stat and store other
+ * info about object characteristics. There is one for every file and dir in
+ * the FS
+ */
+#define BTRFS_INODE_ITEM_KEY 1
+
+/* reserve 2-15 close to the inode for later flexibility */
+
+/*
+ * dir items are the name -> inode pointers in a directory. There is one
+ * for every name in a directory.
+ */
+#define BTRFS_DIR_ITEM_KEY 16
+#define BTRFS_DIR_INDEX_KEY 17
+/*
+ * extent data is for file data
+ */
+#define BTRFS_EXTENT_DATA_KEY 18
+/*
+ * csum items have the checksums for data in the extents
+ */
+#define BTRFS_CSUM_ITEM_KEY 19
+
+/* reserve 20-31 for other file stuff */
+
+/*
+ * root items point to tree roots. There are typically in the root
+ * tree used by the super block to find all the other trees
+ */
+#define BTRFS_ROOT_ITEM_KEY 32
+/*
+ * extent items are in the extent map tree. These record which blocks
+ * are used, and how many references there are to each block
+ */
+#define BTRFS_EXTENT_ITEM_KEY 33
+
+/*
+ * block groups give us hints into the extent allocation trees. Which
+ * blocks are free etc etc
+ */
+#define BTRFS_BLOCK_GROUP_ITEM_KEY 34
+
+/*
+ * string items are for debugging. They just store a short string of
+ * data in the FS
+ */
+#define BTRFS_STRING_ITEM_KEY 253
+
+
+static inline u64 btrfs_block_group_used(struct btrfs_block_group_item *bi)
+{
+ return le64_to_cpu(bi->used);
+}
+
+static inline void btrfs_set_block_group_used(struct
+ btrfs_block_group_item *bi,
+ u64 val)
+{
+ bi->used = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_inode_generation(struct btrfs_inode_item *i)
+{
+ return le64_to_cpu(i->generation);
+}
+
+static inline void btrfs_set_inode_generation(struct btrfs_inode_item *i,
+ u64 val)
+{
+ i->generation = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_inode_size(struct btrfs_inode_item *i)
+{
+ return le64_to_cpu(i->size);
+}
+
+static inline void btrfs_set_inode_size(struct btrfs_inode_item *i, u64 val)
+{
+ i->size = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_inode_nblocks(struct btrfs_inode_item *i)
+{
+ return le64_to_cpu(i->nblocks);
+}
+
+static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item *i, u64 val)
+{
+ i->nblocks = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_inode_block_group(struct btrfs_inode_item *i)
+{
+ return le64_to_cpu(i->block_group);
+}
+
+static inline void btrfs_set_inode_block_group(struct btrfs_inode_item *i,
+ u64 val)
+{
+ i->block_group = cpu_to_le64(val);
+}
+
+static inline u32 btrfs_inode_nlink(struct btrfs_inode_item *i)
+{
+ return le32_to_cpu(i->nlink);
+}
+
+static inline void btrfs_set_inode_nlink(struct btrfs_inode_item *i, u32 val)
+{
+ i->nlink = cpu_to_le32(val);
+}
+
+static inline u32 btrfs_inode_uid(struct btrfs_inode_item *i)
+{
+ return le32_to_cpu(i->uid);
+}
+
+static inline void btrfs_set_inode_uid(struct btrfs_inode_item *i, u32 val)
+{
+ i->uid = cpu_to_le32(val);
+}
+
+static inline u32 btrfs_inode_gid(struct btrfs_inode_item *i)
+{
+ return le32_to_cpu(i->gid);
+}
+
+static inline void btrfs_set_inode_gid(struct btrfs_inode_item *i, u32 val)
+{
+ i->gid = cpu_to_le32(val);
+}
+
+static inline u32 btrfs_inode_mode(struct btrfs_inode_item *i)
+{
+ return le32_to_cpu(i->mode);
+}
+
+static inline void btrfs_set_inode_mode(struct btrfs_inode_item *i, u32 val)
+{
+ i->mode = cpu_to_le32(val);
+}
+
+static inline u32 btrfs_inode_rdev(struct btrfs_inode_item *i)
+{
+ return le32_to_cpu(i->rdev);
+}
+
+static inline void btrfs_set_inode_rdev(struct btrfs_inode_item *i, u32 val)
+{
+ i->rdev = cpu_to_le32(val);
+}
+
+static inline u16 btrfs_inode_flags(struct btrfs_inode_item *i)
+{
+ return le16_to_cpu(i->flags);
+}
+
+static inline void btrfs_set_inode_flags(struct btrfs_inode_item *i, u16 val)
+{
+ i->flags = cpu_to_le16(val);
+}
+
+static inline u16 btrfs_inode_compat_flags(struct btrfs_inode_item *i)
+{
+ return le16_to_cpu(i->compat_flags);
+}
+
+static inline void btrfs_set_inode_compat_flags(struct btrfs_inode_item *i,
+ u16 val)
+{
+ i->compat_flags = cpu_to_le16(val);
+}
+
+static inline u64 btrfs_timespec_sec(struct btrfs_inode_timespec *ts)
+{
+ return le64_to_cpu(ts->sec);
+}
+
+static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec *ts,
+ u64 val)
+{
+ ts->sec = cpu_to_le64(val);
+}
+
+static inline u32 btrfs_timespec_nsec(struct btrfs_inode_timespec *ts)
+{
+ return le32_to_cpu(ts->nsec);
+}
+
+static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec *ts,
+ u32 val)
+{
+ ts->nsec = cpu_to_le32(val);
+}
+
+static inline u32 btrfs_extent_refs(struct btrfs_extent_item *ei)
+{
+ return le32_to_cpu(ei->refs);
+}
+
+static inline void btrfs_set_extent_refs(struct btrfs_extent_item *ei, u32 val)
+{
+ ei->refs = cpu_to_le32(val);
+}
+
+static inline u64 btrfs_extent_owner(struct btrfs_extent_item *ei)
+{
+ return le64_to_cpu(ei->owner);
+}
+
+static inline void btrfs_set_extent_owner(struct btrfs_extent_item *ei, u64 val)
+{
+ ei->owner = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_node_blockptr(struct btrfs_node *n, int nr)
+{
+ return le64_to_cpu(n->ptrs[nr].blockptr);
+}
+
+
+static inline void btrfs_set_node_blockptr(struct btrfs_node *n, int nr,
+ u64 val)
+{
+ n->ptrs[nr].blockptr = cpu_to_le64(val);
+}
+
+static inline u32 btrfs_item_offset(struct btrfs_item *item)
+{
+ return le32_to_cpu(item->offset);
+}
+
+static inline void btrfs_set_item_offset(struct btrfs_item *item, u32 val)
+{
+ item->offset = cpu_to_le32(val);
+}
+
+static inline u32 btrfs_item_end(struct btrfs_item *item)
+{
+ return le32_to_cpu(item->offset) + le16_to_cpu(item->size);
+}
+
+static inline u16 btrfs_item_size(struct btrfs_item *item)
+{
+ return le16_to_cpu(item->size);
+}
+
+static inline void btrfs_set_item_size(struct btrfs_item *item, u16 val)
+{
+ item->size = cpu_to_le16(val);
+}
+
+static inline u16 btrfs_dir_flags(struct btrfs_dir_item *d)
+{
+ return le16_to_cpu(d->flags);
+}
+
+static inline void btrfs_set_dir_flags(struct btrfs_dir_item *d, u16 val)
+{
+ d->flags = cpu_to_le16(val);
+}
+
+static inline u8 btrfs_dir_type(struct btrfs_dir_item *d)
+{
+ return d->type;
+}
+
+static inline void btrfs_set_dir_type(struct btrfs_dir_item *d, u8 val)
+{
+ d->type = val;
+}
+
+static inline u16 btrfs_dir_name_len(struct btrfs_dir_item *d)
+{
+ return le16_to_cpu(d->name_len);
+}
+
+static inline void btrfs_set_dir_name_len(struct btrfs_dir_item *d, u16 val)
+{
+ d->name_len = cpu_to_le16(val);
+}
+
+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->flags = le32_to_cpu(disk->flags);
+ 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->flags = cpu_to_le32(cpu->flags);
+ disk->objectid = cpu_to_le64(cpu->objectid);
+}
+
+static inline u64 btrfs_disk_key_objectid(struct btrfs_disk_key *disk)
+{
+ return le64_to_cpu(disk->objectid);
+}
+
+static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key *disk,
+ u64 val)
+{
+ disk->objectid = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_disk_key_offset(struct btrfs_disk_key *disk)
+{
+ return le64_to_cpu(disk->offset);
+}
+
+static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key *disk,
+ u64 val)
+{
+ disk->offset = cpu_to_le64(val);
+}
+
+static inline u32 btrfs_disk_key_flags(struct btrfs_disk_key *disk)
+{
+ return le32_to_cpu(disk->flags);
+}
+
+static inline void btrfs_set_disk_key_flags(struct btrfs_disk_key *disk,
+ u32 val)
+{
+ disk->flags = cpu_to_le32(val);
+}
+
+static inline u32 btrfs_disk_key_type(struct btrfs_disk_key *key)
+{
+ return le32_to_cpu(key->flags) >> BTRFS_KEY_TYPE_SHIFT;
+}
+
+static inline void btrfs_set_disk_key_type(struct btrfs_disk_key *key,
+ u32 val)
+{
+ u32 flags = btrfs_disk_key_flags(key);
+ BUG_ON(val >= BTRFS_KEY_TYPE_MAX);
+ val = val << BTRFS_KEY_TYPE_SHIFT;
+ flags = (flags & ~BTRFS_KEY_TYPE_MASK) | val;
+ btrfs_set_disk_key_flags(key, flags);
+}
+
+static inline u32 btrfs_key_type(struct btrfs_key *key)
+{
+ return key->flags >> BTRFS_KEY_TYPE_SHIFT;
+}
+
+static inline void btrfs_set_key_type(struct btrfs_key *key, u32 val)
+{
+ BUG_ON(val >= BTRFS_KEY_TYPE_MAX);
+ val = val << BTRFS_KEY_TYPE_SHIFT;
+ key->flags = (key->flags & ~(BTRFS_KEY_TYPE_MASK)) | val;
+}
+
+static inline u64 btrfs_header_blocknr(struct btrfs_header *h)
+{
+ return le64_to_cpu(h->blocknr);
+}
+
+static inline void btrfs_set_header_blocknr(struct btrfs_header *h, u64 blocknr)
+{
+ h->blocknr = cpu_to_le64(blocknr);
+}
+
+static inline u64 btrfs_header_generation(struct btrfs_header *h)
+{
+ return le64_to_cpu(h->generation);
+}
+
+static inline void btrfs_set_header_generation(struct btrfs_header *h,
+ u64 val)
+{
+ h->generation = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_header_owner(struct btrfs_header *h)
+{
+ return le64_to_cpu(h->owner);
+}
+
+static inline void btrfs_set_header_owner(struct btrfs_header *h,
+ u64 val)
+{
+ h->owner = cpu_to_le64(val);
+}
+
+static inline u16 btrfs_header_nritems(struct btrfs_header *h)
+{
+ return le16_to_cpu(h->nritems);
+}
+
+static inline void btrfs_set_header_nritems(struct btrfs_header *h, u16 val)
+{
+ h->nritems = cpu_to_le16(val);
+}
+
+static inline u16 btrfs_header_flags(struct btrfs_header *h)
+{
+ return le16_to_cpu(h->flags);
+}
+
+static inline void btrfs_set_header_flags(struct btrfs_header *h, u16 val)
+{
+ h->flags = cpu_to_le16(val);
+}
+
+static inline int btrfs_header_level(struct btrfs_header *h)
+{
+ return h->level;
+}
+
+static inline void btrfs_set_header_level(struct btrfs_header *h, int level)
+{
+ BUG_ON(level > BTRFS_MAX_LEVEL);
+ h->level = level;
+}
+
+static inline int btrfs_is_leaf(struct btrfs_node *n)
+{
+ return (btrfs_header_level(&n->header) == 0);
+}
+
+static inline u64 btrfs_root_blocknr(struct btrfs_root_item *item)
+{
+ return le64_to_cpu(item->blocknr);
+}
+
+static inline void btrfs_set_root_blocknr(struct btrfs_root_item *item, u64 val)
+{
+ item->blocknr = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_root_dirid(struct btrfs_root_item *item)
+{
+ return le64_to_cpu(item->root_dirid);
+}
+
+static inline void btrfs_set_root_dirid(struct btrfs_root_item *item, u64 val)
+{
+ item->root_dirid = cpu_to_le64(val);
+}
+
+static inline u32 btrfs_root_refs(struct btrfs_root_item *item)
+{
+ return le32_to_cpu(item->refs);
+}
+
+static inline void btrfs_set_root_refs(struct btrfs_root_item *item, u32 val)
+{
+ item->refs = cpu_to_le32(val);
+}
+
+static inline u64 btrfs_super_blocknr(struct btrfs_super_block *s)
+{
+ return le64_to_cpu(s->blocknr);
+}
+
+static inline void btrfs_set_super_blocknr(struct btrfs_super_block *s, u64 val)
+{
+ s->blocknr = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_super_generation(struct btrfs_super_block *s)
+{
+ return le64_to_cpu(s->generation);
+}
+
+static inline void btrfs_set_super_generation(struct btrfs_super_block *s,
+ u64 val)
+{
+ s->generation = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_super_root(struct btrfs_super_block *s)
+{
+ return le64_to_cpu(s->root);
+}
+
+static inline void btrfs_set_super_root(struct btrfs_super_block *s, u64 val)
+{
+ s->root = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_super_total_blocks(struct btrfs_super_block *s)
+{
+ return le64_to_cpu(s->total_blocks);
+}
+
+static inline void btrfs_set_super_total_blocks(struct btrfs_super_block *s,
+ u64 val)
+{
+ s->total_blocks = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_super_blocks_used(struct btrfs_super_block *s)
+{
+ return le64_to_cpu(s->blocks_used);
+}
+
+static inline void btrfs_set_super_blocks_used(struct btrfs_super_block *s,
+ u64 val)
+{
+ s->blocks_used = cpu_to_le64(val);
+}
+
+static inline u32 btrfs_super_blocksize(struct btrfs_super_block *s)
+{
+ return le32_to_cpu(s->blocksize);
+}
+
+static inline void btrfs_set_super_blocksize(struct btrfs_super_block *s,
+ u32 val)
+{
+ s->blocksize = cpu_to_le32(val);
+}
+
+static inline u64 btrfs_super_root_dir(struct btrfs_super_block *s)
+{
+ return le64_to_cpu(s->root_dir_objectid);
+}
+
+static inline void btrfs_set_super_root_dir(struct btrfs_super_block *s, u64
+ val)
+{
+ s->root_dir_objectid = cpu_to_le64(val);
+}
+
+static inline u8 *btrfs_leaf_data(struct btrfs_leaf *l)
+{
+ return (u8 *)l->items;
+}
+
+static inline int btrfs_file_extent_type(struct btrfs_file_extent_item *e)
+{
+ return e->type;
+}
+static inline void btrfs_set_file_extent_type(struct btrfs_file_extent_item *e,
+ u8 val)
+{
+ e->type = val;
+}
+
+static inline char *btrfs_file_extent_inline_start(struct
+ btrfs_file_extent_item *e)
+{
+ return (char *)(&e->disk_blocknr);
+}
+
+static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
+{
+ return (unsigned long)(&((struct
+ btrfs_file_extent_item *)NULL)->disk_blocknr) + datasize;
+}
+
+static inline u32 btrfs_file_extent_inline_len(struct btrfs_item *e)
+{
+ struct btrfs_file_extent_item *fe = NULL;
+ return btrfs_item_size(e) - (unsigned long)(&fe->disk_blocknr);
+}
+
+static inline u64 btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item
+ *e)
+{
+ return le64_to_cpu(e->disk_blocknr);
+}
+
+static inline void btrfs_set_file_extent_disk_blocknr(struct
+ btrfs_file_extent_item
+ *e, u64 val)
+{
+ e->disk_blocknr = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_file_extent_generation(struct btrfs_file_extent_item *e)
+{
+ return le64_to_cpu(e->generation);
+}
+
+static inline void btrfs_set_file_extent_generation(struct
+ btrfs_file_extent_item *e,
+ u64 val)
+{
+ e->generation = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_file_extent_disk_num_blocks(struct
+ btrfs_file_extent_item *e)
+{
+ return le64_to_cpu(e->disk_num_blocks);
+}
+
+static inline void btrfs_set_file_extent_disk_num_blocks(struct
+ btrfs_file_extent_item
+ *e, u64 val)
+{
+ e->disk_num_blocks = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_file_extent_offset(struct btrfs_file_extent_item *e)
+{
+ return le64_to_cpu(e->offset);
+}
+
+static inline void btrfs_set_file_extent_offset(struct btrfs_file_extent_item
+ *e, u64 val)
+{
+ e->offset = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_file_extent_num_blocks(struct btrfs_file_extent_item
+ *e)
+{
+ return le64_to_cpu(e->num_blocks);
+}
+
+static inline void btrfs_set_file_extent_num_blocks(struct
+ btrfs_file_extent_item *e,
+ u64 val)
+{
+ e->num_blocks = cpu_to_le64(val);
+}
+
+static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
+{
+ return sb->s_fs_info;
+}
+
+static inline void btrfs_check_bounds(void *vptr, size_t len,
+ void *vcontainer, size_t container_len)
+{
+ char *ptr = vptr;
+ char *container = vcontainer;
+ WARN_ON(ptr < container);
+ WARN_ON(ptr + len > container + container_len);
+}
+
+static inline void btrfs_memcpy(struct btrfs_root *root,
+ void *dst_block,
+ void *dst, const void *src, size_t nr)
+{
+ btrfs_check_bounds(dst, nr, dst_block, root->fs_info->sb->s_blocksize);
+ memcpy(dst, src, nr);
+}
+
+static inline void btrfs_memmove(struct btrfs_root *root,
+ void *dst_block,
+ void *dst, void *src, size_t nr)
+{
+ btrfs_check_bounds(dst, nr, dst_block, root->fs_info->sb->s_blocksize);
+ memmove(dst, src, nr);
+}
+
+static inline void btrfs_mark_buffer_dirty(struct buffer_head *bh)
+{
+ WARN_ON(!atomic_read(&bh->b_count));
+ mark_buffer_dirty(bh);
+}
+
+/* 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((leaf)->items + (slot))))
+
+/* extent-tree.c */
+struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
+ btrfs_fs_info *info,
+ u64 blocknr);
+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);
+struct buffer_head *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, u64 hint);
+int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, u64 owner,
+ u64 num_blocks, u64 search_start,
+ u64 search_end, struct btrfs_key *ins, int data);
+int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
+ struct buffer_head *buf);
+int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
+ *root, u64 blocknr, u64 num_blocks, int pin);
+int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, struct
+ btrfs_root *root);
+int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ u64 blocknr, u64 num_blocks);
+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_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 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);
+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_leaf_free_space(struct btrfs_root *root, struct btrfs_leaf *leaf);
+int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
+ *root, struct buffer_head *snap);
+/* 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);
+/* 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);
+/* 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(struct btrfs_trans_handle *trans, struct btrfs_root
+ *root, u64 objectid, struct btrfs_inode_item
+ *inode_item);
+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_blocks,
+ u64 num_blocks);
+int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct btrfs_path *path, u64 objectid,
+ u64 blocknr, int mod);
+int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ u64 objectid, u64 offset,
+ char *data, size_t len);
+int btrfs_csum_verify_file_block(struct btrfs_root *root,
+ 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 */
+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);
+int btrfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
+ unsigned long arg);
+long btrfs_compat_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);
+int btrfs_commit_write(struct file *file, struct page *page,
+ unsigned from, unsigned to);
+int btrfs_get_block(struct inode *inode, sector_t iblock,
+ struct buffer_head *result, int create);
+/* file.c */
+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 *hint_block);
#endif
projects / linux-2.6-block.git / blobdiff