-#ifndef __CTREE__
-#define __CTREE__
+#ifndef __BTRFS__
+#define __BTRFS__
#include "list.h"
+#include "kerncompat.h"
-#define CTREE_BLOCKSIZE 1024
+#define BTRFS_MAGIC "_BtRfS_M"
+
+#define BTRFS_ROOT_TREE_OBJECTID 1
+#define BTRFS_EXTENT_TREE_OBJECTID 2
+#define BTRFS_FS_TREE_OBJECTID 3
/*
* the key defines the order in the tree, and so it also defines (optimal)
* 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 key {
+struct btrfs_disk_key {
+ __le64 objectid;
+ __le64 offset;
+ __le32 flags;
+} __attribute__ ((__packed__));
+
+struct btrfs_key {
u64 objectid;
- u32 flags;
u64 offset;
+ u32 flags;
} __attribute__ ((__packed__));
/*
* every tree block (leaf or node) starts with this header.
*/
-struct header {
- u64 fsid[2]; /* FS specific uuid */
- u64 blocknr; /* which block this node is supposed to live in */
- u64 parentid; /* objectid of the tree root */
- u32 csum;
- u32 ham;
- u16 nritems;
- u16 flags;
+struct btrfs_header {
+ 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;
+ __le16 nritems;
+ __le16 flags;
/* generation flags to be added */
} __attribute__ ((__packed__));
-#define MAX_LEVEL 8
-#define NODEPTRS_PER_BLOCK ((CTREE_BLOCKSIZE - sizeof(struct header)) / \
- (sizeof(struct key) + sizeof(u64)))
-
-struct tree_buffer;
-
-/*
- * in ram representation of the tree. extent_root is used for all allocations
- * and for the extent tree extent_root root. current_insert is used
- * only for the extent tree.
- */
-struct ctree_root {
- struct tree_buffer *node;
- struct tree_buffer *commit_root;
- struct ctree_root *extent_root;
- struct key current_insert;
- struct 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;
-};
-
-/*
- * describes a tree on disk
- */
-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 block */
- u32 csum;
- u32 ham;
- u64 snapuuid[2]; /* root specific uuid */
-} __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))
+struct btrfs_buffer;
/*
* the super block basically lists the main trees of the FS
* it currently lacks any block count etc etc
*/
-struct ctree_super_block {
- struct ctree_root_info root_info;
- struct ctree_root_info extent_info;
+struct btrfs_super_block {
+ 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;
} __attribute__ ((__packed__));
/*
- * A leaf is full of items. The exact type of item is defined by
- * the key flags parameter. offset and size tell us where to find
+ * 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 item {
- struct key key;
- u16 offset;
- u16 size;
+struct btrfs_item {
+ struct btrfs_disk_key key;
+ __le32 offset;
+ __le16 size;
} __attribute__ ((__packed__));
/*
* The data is separate from the items to get the keys closer together
* during searches.
*/
-#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_leaf {
+ struct btrfs_header header;
+ struct btrfs_item items[];
} __attribute__ ((__packed__));
/*
* all non-leaf blocks are nodes, they hold only keys and pointers to
* other blocks
*/
-struct node {
- struct header header;
- struct key keys[NODEPTRS_PER_BLOCK];
- u64 blockptrs[NODEPTRS_PER_BLOCK];
+struct btrfs_key_ptr {
+ struct btrfs_disk_key key;
+ __le64 blockptr;
} __attribute__ ((__packed__));
-/*
- * items in the extent btree are used to record the objectid of the
- * owner of the block and the number of references
- */
-struct extent_item {
- u32 refs;
- u64 owner;
+struct btrfs_node {
+ struct btrfs_header header;
+ struct btrfs_key_ptr ptrs[];
} __attribute__ ((__packed__));
/*
- * ctree_paths remember the path taken from the root down to the leaf.
- * level 0 is always the leaf, and nodes[1...MAX_LEVEL] will point
+ * 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 ctree_path {
- struct tree_buffer *nodes[MAX_LEVEL];
- int slots[MAX_LEVEL];
+struct btrfs_path {
+ struct btrfs_buffer *nodes[BTRFS_MAX_LEVEL];
+ int slots[BTRFS_MAX_LEVEL];
};
-static inline u64 btrfs_header_blocknr(struct header *h)
+/*
+ * 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 btrfs_inode_timespec {
+ __le32 sec;
+ __le32 nsec;
+} __attribute__ ((__packed__));
+
+/*
+ * 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;
+ __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__));
+
+/* inline data is just a blob of bytes */
+struct btrfs_inline_data_item {
+ u8 data;
+} __attribute__ ((__packed__));
+
+struct btrfs_dir_item {
+ __le64 objectid;
+ __le16 flags;
+ u8 type;
+} __attribute__ ((__packed__));
+
+struct btrfs_root_item {
+ __le64 blocknr;
+ __le32 flags;
+ __le64 block_limit;
+ __le64 blocks_used;
+ __le32 refs;
+};
+
+/*
+ * in ram representation of the tree. extent_root is used for all allocations
+ * and for the extent tree extent_root root. current_insert is used
+ * 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 btrfs_root_item root_item;
+ struct btrfs_key root_key;
+ u32 blocksize;
+};
+
+/* 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)
+
+/*
+ * 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
+
+/*
+ * dir items are the name -> inode pointers in a directory. There is one
+ * for every name in a directory.
+ */
+#define BTRFS_DIR_ITEM_KEY 2
+/*
+ * inline data is file data that fits in the btree.
+ */
+#define BTRFS_INLINE_DATA_KEY 3
+/*
+ * 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
+/*
+ * 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
+/*
+ * 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
+/*
+ * string items are for debugging. They just store a short string of
+ * data in the FS
+ */
+#define BTRFS_STRING_ITEM_KEY 7
+
+static inline u64 btrfs_inode_generation(struct btrfs_inode_item *i)
{
- return h->blocknr;
+ return le64_to_cpu(i->generation);
}
-static inline void btrfs_set_header_blocknr(struct header *h, u64 blocknr)
+static inline void btrfs_set_inode_generation(struct btrfs_inode_item *i,
+ u64 val)
{
- h->blocknr = blocknr;
+ i->generation = cpu_to_le64(val);
}
-static inline u64 btrfs_header_parentid(struct header *h)
+static inline u64 btrfs_inode_size(struct btrfs_inode_item *i)
{
- return h->parentid;
+ return le64_to_cpu(i->size);
}
-static inline void btrfs_set_header_parentid(struct header *h, u64 parentid)
+static inline void btrfs_set_inode_size(struct btrfs_inode_item *i, u64 val)
{
- h->parentid = parentid;
+ i->size = cpu_to_le64(val);
}
-static inline u32 btrfs_header_nritems(struct header *h)
+static inline u64 btrfs_inode_nblocks(struct btrfs_inode_item *i)
{
- return h->nritems;
+ return le64_to_cpu(i->nblocks);
}
-static inline void btrfs_set_header_nritems(struct header *h, u32 val)
+static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item *i, u64 val)
{
- h->nritems = val;
+ i->nblocks = cpu_to_le64(val);
}
-static inline u32 btrfs_header_flags(struct header *h)
+static inline u32 btrfs_inode_nlink(struct btrfs_inode_item *i)
{
- return h->flags;
+ return le32_to_cpu(i->nlink);
}
-static inline void btrfs_set_header_flags(struct header *h, u32 val)
+static inline void btrfs_set_inode_nlink(struct btrfs_inode_item *i, u32 val)
{
- h->flags = val;
+ i->nlink = cpu_to_le32(val);
}
-static inline int btrfs_header_level(struct header *h)
+static inline u32 btrfs_inode_uid(struct btrfs_inode_item *i)
{
- return btrfs_header_flags(h) & (MAX_LEVEL - 1);
+ return le32_to_cpu(i->uid);
}
-static inline void btrfs_set_header_level(struct header *h, int level)
+static inline void btrfs_set_inode_uid(struct btrfs_inode_item *i, u32 val)
{
- u32 flags;
- BUG_ON(level > MAX_LEVEL);
- flags = btrfs_header_flags(h) & ~(MAX_LEVEL - 1);
+ 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_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 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_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 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);
+}
+
+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 u32 btrfs_dir_name_len(struct btrfs_item *i)
+{
+ return btrfs_item_size(i) - sizeof(struct btrfs_dir_item);
+}
+
+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_key_type(struct btrfs_key *key)
+{
+ return key->flags & BTRFS_KEY_TYPE_MASK;
+}
+
+static inline u32 btrfs_disk_key_type(struct btrfs_disk_key *key)
+{
+ return le32_to_cpu(key->flags) & BTRFS_KEY_TYPE_MASK;
+}
+
+static inline void btrfs_set_key_type(struct btrfs_key *key, u32 type)
+{
+ BUG_ON(type >= BTRFS_KEY_TYPE_MAX);
+ key->flags = (key->flags & ~((u64)BTRFS_KEY_TYPE_MASK)) | type;
+}
+
+static inline void btrfs_set_disk_key_type(struct btrfs_disk_key *key, u32 type)
+{
+ u32 flags = btrfs_disk_key_flags(key);
+ BUG_ON(type >= BTRFS_KEY_TYPE_MAX);
+ flags = (flags & ~((u64)BTRFS_KEY_TYPE_MASK)) | type;
+ btrfs_set_disk_key_flags(key, flags);
+}
+
+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_parentid(struct btrfs_header *h)
+{
+ return le64_to_cpu(h->parentid);
+}
+
+static inline void btrfs_set_header_parentid(struct btrfs_header *h,
+ u64 parentid)
+{
+ h->parentid = cpu_to_le64(parentid);
+}
+
+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 btrfs_header_flags(h) & (BTRFS_MAX_LEVEL - 1);
+}
+
+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);
}
-static inline int btrfs_is_leaf(struct node *n)
+static inline int btrfs_is_leaf(struct btrfs_node *n)
{
return (btrfs_header_level(&n->header) == 0);
}
-struct tree_buffer *alloc_free_block(struct ctree_root *root);
-int btrfs_inc_ref(struct ctree_root *root, struct tree_buffer *buf);
-int free_extent(struct ctree_root *root, u64 blocknr, u64 num_blocks);
-int search_slot(struct ctree_root *root, struct key *key, struct ctree_path *p, int ins_len, int cow);
-void release_path(struct ctree_root *root, struct ctree_path *p);
-void init_path(struct ctree_path *p);
-int del_item(struct ctree_root *root, struct ctree_path *path);
-int insert_item(struct ctree_root *root, struct key *key, void *data, int data_size);
-int next_leaf(struct ctree_root *root, struct ctree_path *path);
-int leaf_free_space(struct leaf *leaf);
-int btrfs_drop_snapshot(struct ctree_root *root, struct tree_buffer *snap);
-int btrfs_finish_extent_commit(struct ctree_root *root);
+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 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_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 u8 *btrfs_leaf_data(struct btrfs_leaf *l)
+{
+ return (u8 *)l->items;
+}
+/* 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);
+void btrfs_release_path(struct btrfs_root *root, 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_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_match_dir_item_name(struct btrfs_root *root, struct btrfs_path *path,
+ char *name, int name_len);
#endif
projects / mv-sheeva.git / blobdiff