#ifndef __BTRFS__
#define __BTRFS__
-#include "list.h"
-#include "kerncompat.h"
+#include <linux/fs.h>
+#include <linux/buffer_head.h>
+#include <linux/kobject.h>
+#include "bit-radix.h"
+
+struct btrfs_trans_handle;
+struct btrfs_transaction;
+extern struct kmem_cache *btrfs_path_cachep;
#define BTRFS_MAGIC "_BtRfS_M"
-#define BTRFS_ROOT_TREE_OBJECTID 1
-#define BTRFS_EXTENT_TREE_OBJECTID 2
-#define BTRFS_FS_TREE_OBJECTID 3
+#define BTRFS_ROOT_TREE_OBJECTID 1ULL
+#define BTRFS_DEV_TREE_OBJECTID 2ULL
+#define BTRFS_EXTENT_TREE_OBJECTID 3ULL
+#define BTRFS_FS_TREE_OBJECTID 4ULL
+#define BTRFS_ROOT_TREE_DIR_OBJECTID 5ULL
+#define BTRFS_FIRST_FREE_OBJECTID 6ULL
+
+/*
+ * 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
/*
* the key defines the order in the tree, and so it also defines (optimal)
* 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 parentid; /* objectid of the tree root */
- __le32 csum;
- __le32 ham;
+ __le64 generation;
__le16 nritems;
__le16 flags;
- /* generation flags to be added */
+ u8 level;
} __attribute__ ((__packed__));
#define BTRFS_MAX_LEVEL 8
#define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->blocksize))
-struct btrfs_buffer;
+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 */
- __le32 csum;
__le64 magic;
__le32 blocksize;
__le64 generation;
__le64 root;
__le64 total_blocks;
__le64 blocks_used;
+ __le64 root_dir_objectid;
+ __le64 last_device_id;
+ /* fields below here vary with the underlying disk */
+ __le64 device_block_start;
+ __le64 device_num_blocks;
+ __le64 device_root;
+ __le64 device_id;
} __attribute__ ((__packed__));
/*
* used while walking the tree.
*/
struct btrfs_path {
- struct btrfs_buffer *nodes[BTRFS_MAX_LEVEL];
+ struct buffer_head *nodes[BTRFS_MAX_LEVEL];
int slots[BTRFS_MAX_LEVEL];
};
*/
struct btrfs_extent_item {
__le32 refs;
- __le64 owner;
} __attribute__ ((__packed__));
struct btrfs_inode_timespec {
- __le32 sec;
+ __le64 sec;
__le32 nsec;
} __attribute__ ((__packed__));
} __attribute__ ((__packed__));
struct btrfs_dir_item {
- __le64 objectid;
+ struct btrfs_disk_key location;
__le16 flags;
__le16 name_len;
u8 type;
} __attribute__ ((__packed__));
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 btrfs_file_extent_item {
+ __le64 generation;
+ /*
+ * 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[BTRFS_CSUM_SIZE];
+} __attribute__ ((__packed__));
+
+struct btrfs_device_item {
+ __le16 pathlen;
+ __le64 device_id;
+} __attribute__ ((__packed__));
+
+struct crypto_hash;
+struct btrfs_fs_info {
+ struct btrfs_root *extent_root;
+ struct btrfs_root *tree_root;
+ struct btrfs_root *dev_root;
+ struct btrfs_key current_insert;
+ struct btrfs_key last_insert;
+ struct radix_tree_root fs_roots_radix;
+ struct radix_tree_root pending_del_radix;
+ struct radix_tree_root pinned_radix;
+ struct radix_tree_root dev_radix;
+ 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 crypto_hash *hash_tfm;
+ spinlock_t hash_lock;
+ struct kobject kobj;
};
/*
* only for the extent tree.
*/
struct btrfs_root {
- struct btrfs_buffer *node;
- struct btrfs_buffer *commit_root;
- struct btrfs_root *extent_root;
- struct btrfs_root *tree_root;
- struct btrfs_key current_insert;
- struct btrfs_key last_insert;
- int fp;
- struct radix_tree_root cache_radix;
- struct radix_tree_root pinned_radix;
- struct list_head trans;
- struct list_head cache;
- int cache_size;
- int ref_cows;
+ 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_MASK (BTRFS_KEY_TYPE_MAX - 1)
+#define BTRFS_KEY_TYPE_SHIFT 24
+#define BTRFS_KEY_TYPE_MASK (((u32)BTRFS_KEY_TYPE_MAX - 1) << \
+ BTRFS_KEY_TYPE_SHIFT)
+
+#define BTRFS_KEY_OVERFLOW_MAX 128
+#define BTRFS_KEY_OVERFLOW_MASK ((u32)BTRFS_KEY_OVERFLOW_MAX - 1)
/*
* inode items have the data typically returned from stat and store other
* for every name in a directory.
*/
#define BTRFS_DIR_ITEM_KEY 2
+#define BTRFS_DIR_INDEX_KEY 3
/*
* inline data is file data that fits in the btree.
*/
-#define BTRFS_INLINE_DATA_KEY 3
+#define BTRFS_INLINE_DATA_KEY 4
/*
* extent data is for data that can't fit in the btree. It points to
* a (hopefully) huge chunk of disk
*/
-#define BTRFS_EXTENT_DATA_KEY 4
+#define BTRFS_EXTENT_DATA_KEY 5
+/*
+ * csum items have the checksums for data in the extents
+ */
+#define BTRFS_CSUM_ITEM_KEY 6
+
/*
* 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 5
+#define BTRFS_ROOT_ITEM_KEY 7
/*
* 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 6
+#define BTRFS_EXTENT_ITEM_KEY 8
+
+/*
+ * dev items list the devices that make up the FS
+ */
+#define BTRFS_DEV_ITEM_KEY 9
+
/*
* string items are for debugging. They just store a short string of
* data in the FS
*/
-#define BTRFS_STRING_ITEM_KEY 7
+#define BTRFS_STRING_ITEM_KEY 10
static inline u64 btrfs_inode_generation(struct btrfs_inode_item *i)
{
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 u64 btrfs_extent_owner(struct btrfs_extent_item *ei)
+static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec *ts,
+ u64 val)
{
- return le64_to_cpu(ei->owner);
+ ts->sec = cpu_to_le64(val);
}
-static inline void btrfs_set_extent_owner(struct btrfs_extent_item *ei, u64 val)
+static inline u32 btrfs_timespec_nsec(struct btrfs_inode_timespec *ts)
{
- ei->owner = cpu_to_le64(val);
+ 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)
item->size = cpu_to_le16(val);
}
-static inline u64 btrfs_dir_objectid(struct btrfs_dir_item *d)
-{
- return le64_to_cpu(d->objectid);
-}
-
-static inline void btrfs_set_dir_objectid(struct btrfs_dir_item *d, u64 val)
-{
- d->objectid = cpu_to_le64(val);
-}
-
static inline u16 btrfs_dir_flags(struct btrfs_dir_item *d)
{
return le16_to_cpu(d->flags);
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_MASK;
+ return key->flags >> BTRFS_KEY_TYPE_SHIFT;
}
-static inline u32 btrfs_disk_key_type(struct btrfs_disk_key *key)
+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 u32 btrfs_key_overflow(struct btrfs_key *key)
{
- return le32_to_cpu(key->flags) & BTRFS_KEY_TYPE_MASK;
+ return key->flags & BTRFS_KEY_OVERFLOW_MASK;
}
-static inline void btrfs_set_key_type(struct btrfs_key *key, u32 type)
+static inline void btrfs_set_key_overflow(struct btrfs_key *key, u32 over)
{
- BUG_ON(type >= BTRFS_KEY_TYPE_MAX);
- key->flags = (key->flags & ~((u64)BTRFS_KEY_TYPE_MASK)) | type;
+ BUG_ON(over >= BTRFS_KEY_OVERFLOW_MAX);
+ key->flags = (key->flags & ~BTRFS_KEY_OVERFLOW_MASK) | over;
}
-static inline void btrfs_set_disk_key_type(struct btrfs_disk_key *key, u32 type)
+static inline u32 btrfs_disk_key_overflow(struct btrfs_disk_key *key)
+{
+ return le32_to_cpu(key->flags) & BTRFS_KEY_OVERFLOW_MASK;
+}
+
+static inline void btrfs_set_disk_key_overflow(struct btrfs_disk_key *key,
+ u32 over)
{
u32 flags = btrfs_disk_key_flags(key);
- BUG_ON(type >= BTRFS_KEY_TYPE_MAX);
- flags = (flags & ~((u64)BTRFS_KEY_TYPE_MASK)) | type;
+ BUG_ON(over >= BTRFS_KEY_OVERFLOW_MAX);
+ flags = (flags & ~BTRFS_KEY_OVERFLOW_MASK) | over;
btrfs_set_disk_key_flags(key, flags);
}
h->blocknr = cpu_to_le64(blocknr);
}
-static inline u64 btrfs_header_parentid(struct btrfs_header *h)
+static inline u64 btrfs_header_generation(struct btrfs_header *h)
{
- return le64_to_cpu(h->parentid);
+ return le64_to_cpu(h->generation);
}
-static inline void btrfs_set_header_parentid(struct btrfs_header *h,
- u64 parentid)
+static inline void btrfs_set_header_generation(struct btrfs_header *h,
+ u64 val)
{
- h->parentid = cpu_to_le64(parentid);
+ h->generation = cpu_to_le64(val);
}
static inline u16 btrfs_header_nritems(struct btrfs_header *h)
static inline int btrfs_header_level(struct btrfs_header *h)
{
- return btrfs_header_flags(h) & (BTRFS_MAX_LEVEL - 1);
+ return h->level;
}
static inline void btrfs_set_header_level(struct btrfs_header *h, int level)
{
- u16 flags;
BUG_ON(level > BTRFS_MAX_LEVEL);
- flags = btrfs_header_flags(h) & ~(BTRFS_MAX_LEVEL - 1);
- btrfs_set_header_flags(h, flags | level);
+ h->level = level;
}
static inline int btrfs_is_leaf(struct btrfs_node *n)
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);
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);
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 u64 btrfs_super_last_device_id(struct btrfs_super_block *s)
+{
+ return le64_to_cpu(s->last_device_id);
+}
+
+static inline void btrfs_set_super_last_device_id(struct btrfs_super_block *s,
+ u64 val)
+{
+ s->last_device_id = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_super_device_id(struct btrfs_super_block *s)
+{
+ return le64_to_cpu(s->device_id);
+}
+
+static inline void btrfs_set_super_device_id(struct btrfs_super_block *s,
+ u64 val)
+{
+ s->device_id = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_super_device_block_start(struct btrfs_super_block *s)
+{
+ return le64_to_cpu(s->device_block_start);
+}
+
+static inline void btrfs_set_super_device_block_start(struct btrfs_super_block
+ *s, u64 val)
+{
+ s->device_block_start = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_super_device_num_blocks(struct btrfs_super_block *s)
+{
+ return le64_to_cpu(s->device_num_blocks);
+}
+
+static inline void btrfs_set_super_device_num_blocks(struct btrfs_super_block
+ *s, u64 val)
+{
+ s->device_num_blocks = cpu_to_le64(val);
+}
+
+static inline u64 btrfs_super_device_root(struct btrfs_super_block *s)
+{
+ return le64_to_cpu(s->device_root);
+}
+
+static inline void btrfs_set_super_device_root(struct btrfs_super_block
+ *s, u64 val)
+{
+ s->device_root = cpu_to_le64(val);
+}
+
+
static inline u8 *btrfs_leaf_data(struct btrfs_leaf *l)
{
return (u8 *)l->items;
}
+
+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 u16 btrfs_device_pathlen(struct btrfs_device_item *d)
+{
+ return le16_to_cpu(d->pathlen);
+}
+
+static inline void btrfs_set_device_pathlen(struct btrfs_device_item *d,
+ u16 val)
+{
+ d->pathlen = cpu_to_le16(val);
+}
+
+static inline u64 btrfs_device_id(struct btrfs_device_item *d)
+{
+ return le64_to_cpu(d->device_id);
+}
+
+static inline void btrfs_set_device_id(struct btrfs_device_item *d,
+ u64 val)
+{
+ d->device_id = 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))))
-struct btrfs_buffer *btrfs_alloc_free_block(struct btrfs_root *root);
-int btrfs_inc_ref(struct btrfs_root *root, struct btrfs_buffer *buf);
-int btrfs_free_extent(struct btrfs_root *root, u64 blocknr, u64 num_blocks);
-int btrfs_search_slot(struct btrfs_root *root, struct btrfs_key *key,
- struct btrfs_path *p, int ins_len, int cow);
+/* extent-tree.c */
+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);
+int btrfs_alloc_extent(struct btrfs_trans_handle *trans, struct btrfs_root
+ *root, u64 num_blocks, u64 search_start, u64
+ search_end, struct btrfs_key *ins);
+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);
+/* 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_root *root, struct btrfs_path *path);
-int btrfs_insert_item(struct btrfs_root *root, struct btrfs_key *key,
- void *data, u32 data_size);
-int btrfs_insert_empty_item(struct btrfs_root *root, struct btrfs_path *path,
- struct btrfs_key *cpu_key, u32 data_size);
+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_root *root, struct btrfs_buffer *snap);
-int btrfs_finish_extent_commit(struct btrfs_root *root);
-int btrfs_del_root(struct btrfs_root *root, struct btrfs_key *key);
-int btrfs_insert_root(struct btrfs_root *root, struct btrfs_key *key,
- struct btrfs_root_item *item);
-int btrfs_update_root(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_insert_dir_item(struct btrfs_root *root, char *name, int name_len,
- u64 dir, u64 objectid, u8 type);
-int btrfs_lookup_dir_item(struct btrfs_root *root, struct btrfs_path *path,
- u64 dir, char *name, int name_len, int mod);
+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);
+int 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);
+int btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct btrfs_path *path, u64 dir,
+ u64 objectid, int mod);
int btrfs_match_dir_item_name(struct btrfs_root *root, struct btrfs_path *path,
- char *name, int name_len);
+ const char *name, int name_len);
+/* 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 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);
+/* super.c */
+extern struct subsystem btrfs_subsys;
+
#endif