| #ifndef __BTRFS__ |
| #define __BTRFS__ |
| |
| struct btrfs_trans_handle; |
| |
| #define BTRFS_MAGIC "_BtRfS_M" |
| |
| #define BTRFS_ROOT_TREE_OBJECTID 1 |
| #define BTRFS_EXTENT_TREE_OBJECTID 2 |
| #define BTRFS_INODE_MAP_OBJECTID 3 |
| #define BTRFS_FS_TREE_OBJECTID 4 |
| |
| /* |
| * 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__)); |
| |
| /* |
| * every tree block (leaf or node) starts with this header. |
| */ |
| 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 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 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; |
| __le64 root_dir_objectid; |
| } __attribute__ ((__packed__)); |
| |
| /* |
| * 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__)); |
| |
| /* |
| * 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__)); |
| |
| /* |
| * 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 btrfs_node { |
| struct btrfs_header header; |
| struct btrfs_key_ptr ptrs[]; |
| } __attribute__ ((__packed__)); |
| |
| /* |
| * 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 btrfs_buffer *nodes[BTRFS_MAX_LEVEL]; |
| int slots[BTRFS_MAX_LEVEL]; |
| }; |
| |
| /* |
| * 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; |
| __le16 name_len; |
| u8 type; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_root_item { |
| __le64 blocknr; |
| __le32 flags; |
| __le64 block_limit; |
| __le64 blocks_used; |
| __le32 refs; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_file_extent_item { |
| /* |
| * 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 bytes (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_inode_map_item { |
| struct btrfs_disk_key key; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_fs_info { |
| struct btrfs_root *fs_root; |
| struct btrfs_root *extent_root; |
| struct btrfs_root *tree_root; |
| struct btrfs_root *inode_root; |
| struct btrfs_key current_insert; |
| struct btrfs_key last_insert; |
| struct radix_tree_root cache_radix; |
| struct radix_tree_root pinned_radix; |
| struct list_head trans; |
| struct list_head cache; |
| u64 last_inode_alloc; |
| u64 last_inode_alloc_dirid; |
| u64 generation; |
| int cache_size; |
| int fp; |
| struct btrfs_trans_handle *running_transaction; |
| struct btrfs_super_block *disk_super; |
| }; |
| |
| /* |
| * 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_item root_item; |
| struct btrfs_key root_key; |
| struct btrfs_fs_info *fs_info; |
| u32 blocksize; |
| int ref_cows; |
| u32 type; |
| }; |
| |
| /* 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 |
| |
| /* |
| * the inode map records which inode numbers are in use and where |
| * they actually live on disk |
| */ |
| #define BTRFS_INODE_MAP_ITEM_KEY 7 |
| /* |
| * string items are for debugging. They just store a short string of |
| * data in the FS |
| */ |
| #define BTRFS_STRING_ITEM_KEY 8 |
| |
| 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 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_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 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_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 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 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 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 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_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); |
| } |
| |
| /* 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_trans_handle *trans, |
| struct btrfs_root *root); |
| int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| struct btrfs_buffer *buf); |
| int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root |
| *root, u64 blocknr, u64 num_blocks, int pin); |
| 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); |
| 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 btrfs_buffer *snap); |
| int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, struct |
| btrfs_root *root); |
| 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_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| *root, char *name, int name_len, u64 dir, u64 |
| objectid, u8 type); |
| int btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 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); |
| int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, |
| struct btrfs_root *fs_root, |
| u64 dirid, u64 *objectid); |
| int btrfs_insert_inode_map(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| u64 objectid, struct btrfs_key *location); |
| int btrfs_lookup_inode_map(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, struct btrfs_path *path, |
| u64 objectid, int mod); |
| 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, u64 objectid, int mod); |
| #endif |