| /* |
| * 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. |
| */ |
| |
| #ifndef __BTRFS__ |
| #define __BTRFS__ |
| |
| #if BTRFS_FLAT_INCLUDES |
| #include "list.h" |
| #include "kerncompat.h" |
| #include "radix-tree.h" |
| #include "extent-cache.h" |
| #include "extent_io.h" |
| #include "ioctl.h" |
| #else |
| #include <btrfs/list.h> |
| #include <btrfs/kerncompat.h> |
| #include <btrfs/radix-tree.h> |
| #include <btrfs/extent-cache.h> |
| #include <btrfs/extent_io.h> |
| #include <btrfs/ioctl.h> |
| #endif /* BTRFS_FLAT_INCLUDES */ |
| |
| struct btrfs_root; |
| struct btrfs_trans_handle; |
| struct btrfs_free_space_ctl; |
| #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ |
| |
| #define BTRFS_MAX_MIRRORS 3 |
| |
| #define BTRFS_MAX_LEVEL 8 |
| |
| #define BTRFS_COMPAT_EXTENT_TREE_V0 |
| |
| /* holds pointers to all of the tree roots */ |
| #define BTRFS_ROOT_TREE_OBJECTID 1ULL |
| |
| /* stores information about which extents are in use, and reference counts */ |
| #define BTRFS_EXTENT_TREE_OBJECTID 2ULL |
| |
| /* |
| * chunk tree stores translations from logical -> physical block numbering |
| * the super block points to the chunk tree |
| */ |
| #define BTRFS_CHUNK_TREE_OBJECTID 3ULL |
| |
| /* |
| * stores information about which areas of a given device are in use. |
| * one per device. The tree of tree roots points to the device tree |
| */ |
| #define BTRFS_DEV_TREE_OBJECTID 4ULL |
| |
| /* one per subvolume, storing files and directories */ |
| #define BTRFS_FS_TREE_OBJECTID 5ULL |
| |
| /* directory objectid inside the root tree */ |
| #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL |
| /* holds checksums of all the data extents */ |
| #define BTRFS_CSUM_TREE_OBJECTID 7ULL |
| #define BTRFS_QUOTA_TREE_OBJECTID 8ULL |
| |
| /* for storing items that use the BTRFS_UUID_KEY* */ |
| #define BTRFS_UUID_TREE_OBJECTID 9ULL |
| |
| /* for storing balance parameters in the root tree */ |
| #define BTRFS_BALANCE_OBJECTID -4ULL |
| |
| /* oprhan objectid for tracking unlinked/truncated files */ |
| #define BTRFS_ORPHAN_OBJECTID -5ULL |
| |
| /* does write ahead logging to speed up fsyncs */ |
| #define BTRFS_TREE_LOG_OBJECTID -6ULL |
| #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL |
| |
| /* space balancing */ |
| #define BTRFS_TREE_RELOC_OBJECTID -8ULL |
| #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL |
| |
| /* |
| * extent checksums all have this objectid |
| * this allows them to share the logging tree |
| * for fsyncs |
| */ |
| #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL |
| |
| /* For storing free space cache */ |
| #define BTRFS_FREE_SPACE_OBJECTID -11ULL |
| |
| /* |
| * The inode number assigned to the special inode for sotring |
| * free ino cache |
| */ |
| #define BTRFS_FREE_INO_OBJECTID -12ULL |
| |
| /* dummy objectid represents multiple objectids */ |
| #define BTRFS_MULTIPLE_OBJECTIDS -255ULL |
| |
| /* |
| * All files have objectids in this range. |
| */ |
| #define BTRFS_FIRST_FREE_OBJECTID 256ULL |
| #define BTRFS_LAST_FREE_OBJECTID -256ULL |
| #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL |
| |
| |
| |
| /* |
| * the device items go into the chunk tree. The key is in the form |
| * [ 1 BTRFS_DEV_ITEM_KEY device_id ] |
| */ |
| #define BTRFS_DEV_ITEMS_OBJECTID 1ULL |
| |
| /* |
| * the max metadata block size. This limit is somewhat artificial, |
| * but the memmove costs go through the roof for larger blocks. |
| */ |
| #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 |
| |
| /* |
| * we can actually store much bigger names, but lets not confuse the rest |
| * of linux |
| */ |
| #define BTRFS_NAME_LEN 255 |
| |
| /* |
| * Theoretical limit is larger, but we keep this down to a sane |
| * value. That should limit greatly the possibility of collisions on |
| * inode ref items. |
| */ |
| #define BTRFS_LINK_MAX 65535U |
| |
| /* 32 bytes in various csum fields */ |
| #define BTRFS_CSUM_SIZE 32 |
| |
| /* csum types */ |
| #define BTRFS_CSUM_TYPE_CRC32 0 |
| |
| static int btrfs_csum_sizes[] = { 4, 0 }; |
| |
| /* four bytes for CRC32 */ |
| #define BTRFS_CRC32_SIZE 4 |
| #define BTRFS_EMPTY_DIR_SIZE 0 |
| |
| #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_XATTR 8 |
| #define BTRFS_FT_MAX 9 |
| |
| #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0) |
| |
| /* |
| * 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; |
| u8 type; |
| __le64 offset; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_key { |
| u64 objectid; |
| u8 type; |
| u64 offset; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_mapping_tree { |
| struct cache_tree cache_tree; |
| }; |
| |
| #define BTRFS_UUID_SIZE 16 |
| struct btrfs_dev_item { |
| /* the internal btrfs device id */ |
| __le64 devid; |
| |
| /* size of the device */ |
| __le64 total_bytes; |
| |
| /* bytes used */ |
| __le64 bytes_used; |
| |
| /* optimal io alignment for this device */ |
| __le32 io_align; |
| |
| /* optimal io width for this device */ |
| __le32 io_width; |
| |
| /* minimal io size for this device */ |
| __le32 sector_size; |
| |
| /* type and info about this device */ |
| __le64 type; |
| |
| /* expected generation for this device */ |
| __le64 generation; |
| |
| /* |
| * starting byte of this partition on the device, |
| * to allowr for stripe alignment in the future |
| */ |
| __le64 start_offset; |
| |
| /* grouping information for allocation decisions */ |
| __le32 dev_group; |
| |
| /* seek speed 0-100 where 100 is fastest */ |
| u8 seek_speed; |
| |
| /* bandwidth 0-100 where 100 is fastest */ |
| u8 bandwidth; |
| |
| /* btrfs generated uuid for this device */ |
| u8 uuid[BTRFS_UUID_SIZE]; |
| |
| /* uuid of FS who owns this device */ |
| u8 fsid[BTRFS_UUID_SIZE]; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_stripe { |
| __le64 devid; |
| __le64 offset; |
| u8 dev_uuid[BTRFS_UUID_SIZE]; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_chunk { |
| /* size of this chunk in bytes */ |
| __le64 length; |
| |
| /* objectid of the root referencing this chunk */ |
| __le64 owner; |
| |
| __le64 stripe_len; |
| __le64 type; |
| |
| /* optimal io alignment for this chunk */ |
| __le32 io_align; |
| |
| /* optimal io width for this chunk */ |
| __le32 io_width; |
| |
| /* minimal io size for this chunk */ |
| __le32 sector_size; |
| |
| /* 2^16 stripes is quite a lot, a second limit is the size of a single |
| * item in the btree |
| */ |
| __le16 num_stripes; |
| |
| /* sub stripes only matter for raid10 */ |
| __le16 sub_stripes; |
| struct btrfs_stripe stripe; |
| /* additional stripes go here */ |
| } __attribute__ ((__packed__)); |
| |
| #define BTRFS_FREE_SPACE_EXTENT 1 |
| #define BTRFS_FREE_SPACE_BITMAP 2 |
| |
| struct btrfs_free_space_entry { |
| __le64 offset; |
| __le64 bytes; |
| u8 type; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_free_space_header { |
| struct btrfs_disk_key location; |
| __le64 generation; |
| __le64 num_entries; |
| __le64 num_bitmaps; |
| } __attribute__ ((__packed__)); |
| |
| static inline unsigned long btrfs_chunk_item_size(int num_stripes) |
| { |
| BUG_ON(num_stripes == 0); |
| return sizeof(struct btrfs_chunk) + |
| sizeof(struct btrfs_stripe) * (num_stripes - 1); |
| } |
| |
| #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0) |
| #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1) |
| #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32) |
| #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33) |
| |
| #define BTRFS_BACKREF_REV_MAX 256 |
| #define BTRFS_BACKREF_REV_SHIFT 56 |
| #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ |
| BTRFS_BACKREF_REV_SHIFT) |
| |
| #define BTRFS_OLD_BACKREF_REV 0 |
| #define BTRFS_MIXED_BACKREF_REV 1 |
| |
| /* |
| * every tree block (leaf or node) starts with this header. |
| */ |
| struct btrfs_header { |
| /* these first four must match the super block */ |
| u8 csum[BTRFS_CSUM_SIZE]; |
| u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
| __le64 bytenr; /* which block this node is supposed to live in */ |
| __le64 flags; |
| |
| /* allowed to be different from the super from here on down */ |
| u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
| __le64 generation; |
| __le64 owner; |
| __le32 nritems; |
| u8 level; |
| } __attribute__ ((__packed__)); |
| |
| #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ |
| sizeof(struct btrfs_header)) / \ |
| sizeof(struct btrfs_key_ptr)) |
| #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
| #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) |
| #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
| sizeof(struct btrfs_item) - \ |
| sizeof(struct btrfs_file_extent_item)) |
| #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
| sizeof(struct btrfs_item) -\ |
| sizeof(struct btrfs_dir_item)) |
| |
| |
| /* |
| * this is a very generous portion of the super block, giving us |
| * room to translate 14 chunks with 3 stripes each. |
| */ |
| #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 |
| #define BTRFS_LABEL_SIZE 256 |
| |
| /* |
| * just in case we somehow lose the roots and are not able to mount, |
| * we store an array of the roots from previous transactions |
| * in the super. |
| */ |
| #define BTRFS_NUM_BACKUP_ROOTS 4 |
| struct btrfs_root_backup { |
| __le64 tree_root; |
| __le64 tree_root_gen; |
| |
| __le64 chunk_root; |
| __le64 chunk_root_gen; |
| |
| __le64 extent_root; |
| __le64 extent_root_gen; |
| |
| __le64 fs_root; |
| __le64 fs_root_gen; |
| |
| __le64 dev_root; |
| __le64 dev_root_gen; |
| |
| __le64 csum_root; |
| __le64 csum_root_gen; |
| |
| __le64 total_bytes; |
| __le64 bytes_used; |
| __le64 num_devices; |
| /* future */ |
| __le64 unsed_64[4]; |
| |
| u8 tree_root_level; |
| u8 chunk_root_level; |
| u8 extent_root_level; |
| u8 fs_root_level; |
| u8 dev_root_level; |
| u8 csum_root_level; |
| /* future and to align */ |
| u8 unused_8[10]; |
| } __attribute__ ((__packed__)); |
| |
| /* |
| * 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[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
| __le64 bytenr; /* this block number */ |
| __le64 flags; |
| |
| /* allowed to be different from the btrfs_header from here own down */ |
| __le64 magic; |
| __le64 generation; |
| __le64 root; |
| __le64 chunk_root; |
| __le64 log_root; |
| |
| /* this will help find the new super based on the log root */ |
| __le64 log_root_transid; |
| __le64 total_bytes; |
| __le64 bytes_used; |
| __le64 root_dir_objectid; |
| __le64 num_devices; |
| __le32 sectorsize; |
| __le32 nodesize; |
| __le32 leafsize; |
| __le32 stripesize; |
| __le32 sys_chunk_array_size; |
| __le64 chunk_root_generation; |
| __le64 compat_flags; |
| __le64 compat_ro_flags; |
| __le64 incompat_flags; |
| __le16 csum_type; |
| u8 root_level; |
| u8 chunk_root_level; |
| u8 log_root_level; |
| struct btrfs_dev_item dev_item; |
| |
| char label[BTRFS_LABEL_SIZE]; |
| |
| __le64 cache_generation; |
| __le64 uuid_tree_generation; |
| |
| /* future expansion */ |
| __le64 reserved[30]; |
| u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; |
| struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; |
| } __attribute__ ((__packed__)); |
| |
| /* |
| * Compat flags that we support. If any incompat flags are set other than the |
| * ones specified below then we will fail to mount |
| */ |
| #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0) |
| #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1) |
| #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2) |
| #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3) |
| |
| /* |
| * some patches floated around with a second compression method |
| * lets save that incompat here for when they do get in |
| * Note we don't actually support it, we're just reserving the |
| * number |
| */ |
| #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4) |
| |
| /* |
| * older kernels tried to do bigger metadata blocks, but the |
| * code was pretty buggy. Lets not let them try anymore. |
| */ |
| #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5) |
| #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6) |
| #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7) |
| #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8) |
| #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9) |
| |
| |
| #define BTRFS_FEATURE_COMPAT_SUPP 0ULL |
| #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL |
| #define BTRFS_FEATURE_INCOMPAT_SUPP \ |
| (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ |
| BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ |
| BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ |
| BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ |
| BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ |
| BTRFS_FEATURE_INCOMPAT_RAID56 | \ |
| BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ |
| BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ |
| BTRFS_FEATURE_INCOMPAT_NO_HOLES) |
| |
| /* |
| * 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; |
| __le32 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; |
| __le64 generation; |
| } __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 extent_buffer *nodes[BTRFS_MAX_LEVEL]; |
| int slots[BTRFS_MAX_LEVEL]; |
| /* if there is real range locking, this locks field will change */ |
| int locks[BTRFS_MAX_LEVEL]; |
| int reada; |
| /* keep some upper locks as we walk down */ |
| int lowest_level; |
| |
| /* |
| * set by btrfs_split_item, tells search_slot to keep all locks |
| * and to force calls to keep space in the nodes |
| */ |
| unsigned int search_for_split:1; |
| unsigned int skip_check_block:1; |
| }; |
| |
| /* |
| * 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 { |
| __le64 refs; |
| __le64 generation; |
| __le64 flags; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_extent_item_v0 { |
| __le32 refs; |
| } __attribute__ ((__packed__)); |
| |
| #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \ |
| sizeof(struct btrfs_item)) |
| |
| #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0) |
| #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1) |
| |
| /* following flags only apply to tree blocks */ |
| |
| /* use full backrefs for extent pointers in the block*/ |
| #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8) |
| |
| struct btrfs_tree_block_info { |
| struct btrfs_disk_key key; |
| u8 level; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_extent_data_ref { |
| __le64 root; |
| __le64 objectid; |
| __le64 offset; |
| __le32 count; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_shared_data_ref { |
| __le32 count; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_extent_inline_ref { |
| u8 type; |
| __le64 offset; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_extent_ref_v0 { |
| __le64 root; |
| __le64 generation; |
| __le64 objectid; |
| __le32 count; |
| } __attribute__ ((__packed__)); |
| |
| /* dev extents record free space on individual devices. The owner |
| * field points back to the chunk allocation mapping tree that allocated |
| * the extent. The chunk tree uuid field is a way to double check the owner |
| */ |
| struct btrfs_dev_extent { |
| __le64 chunk_tree; |
| __le64 chunk_objectid; |
| __le64 chunk_offset; |
| __le64 length; |
| u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_inode_ref { |
| __le64 index; |
| __le16 name_len; |
| /* name goes here */ |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_inode_extref { |
| __le64 parent_objectid; |
| __le64 index; |
| __le16 name_len; |
| __u8 name[0]; /* name goes here */ |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_timespec { |
| __le64 sec; |
| __le32 nsec; |
| } __attribute__ ((__packed__)); |
| |
| typedef enum { |
| BTRFS_COMPRESS_NONE = 0, |
| BTRFS_COMPRESS_ZLIB = 1, |
| BTRFS_COMPRESS_LZO = 2, |
| BTRFS_COMPRESS_TYPES = 2, |
| BTRFS_COMPRESS_LAST = 3, |
| } btrfs_compression_type; |
| |
| /* we don't understand any encryption methods right now */ |
| typedef enum { |
| BTRFS_ENCRYPTION_NONE = 0, |
| BTRFS_ENCRYPTION_LAST = 1, |
| } btrfs_encryption_type; |
| |
| enum btrfs_tree_block_status { |
| BTRFS_TREE_BLOCK_CLEAN, |
| BTRFS_TREE_BLOCK_INVALID_NRITEMS, |
| BTRFS_TREE_BLOCK_INVALID_PARENT_KEY, |
| BTRFS_TREE_BLOCK_BAD_KEY_ORDER, |
| BTRFS_TREE_BLOCK_INVALID_LEVEL, |
| BTRFS_TREE_BLOCK_INVALID_FREE_SPACE, |
| BTRFS_TREE_BLOCK_INVALID_OFFSETS, |
| }; |
| |
| struct btrfs_inode_item { |
| /* nfs style generation number */ |
| __le64 generation; |
| /* transid that last touched this inode */ |
| __le64 transid; |
| __le64 size; |
| __le64 nbytes; |
| __le64 block_group; |
| __le32 nlink; |
| __le32 uid; |
| __le32 gid; |
| __le32 mode; |
| __le64 rdev; |
| __le64 flags; |
| |
| /* modification sequence number for NFS */ |
| __le64 sequence; |
| |
| /* |
| * a little future expansion, for more than this we can |
| * just grow the inode item and version it |
| */ |
| __le64 reserved[4]; |
| struct btrfs_timespec atime; |
| struct btrfs_timespec ctime; |
| struct btrfs_timespec mtime; |
| struct btrfs_timespec otime; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_dir_log_item { |
| __le64 end; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_dir_item { |
| struct btrfs_disk_key location; |
| __le64 transid; |
| __le16 data_len; |
| __le16 name_len; |
| u8 type; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_root_item_v0 { |
| struct btrfs_inode_item inode; |
| __le64 generation; |
| __le64 root_dirid; |
| __le64 bytenr; |
| __le64 byte_limit; |
| __le64 bytes_used; |
| __le64 last_snapshot; |
| __le64 flags; |
| __le32 refs; |
| struct btrfs_disk_key drop_progress; |
| u8 drop_level; |
| u8 level; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_root_item { |
| struct btrfs_inode_item inode; |
| __le64 generation; |
| __le64 root_dirid; |
| __le64 bytenr; |
| __le64 byte_limit; |
| __le64 bytes_used; |
| __le64 last_snapshot; |
| __le64 flags; |
| __le32 refs; |
| struct btrfs_disk_key drop_progress; |
| u8 drop_level; |
| u8 level; |
| |
| /* |
| * The following fields appear after subvol_uuids+subvol_times |
| * were introduced. |
| */ |
| |
| /* |
| * This generation number is used to test if the new fields are valid |
| * and up to date while reading the root item. Everytime the root item |
| * is written out, the "generation" field is copied into this field. If |
| * anyone ever mounted the fs with an older kernel, we will have |
| * mismatching generation values here and thus must invalidate the |
| * new fields. See btrfs_update_root and btrfs_find_last_root for |
| * details. |
| * the offset of generation_v2 is also used as the start for the memset |
| * when invalidating the fields. |
| */ |
| __le64 generation_v2; |
| u8 uuid[BTRFS_UUID_SIZE]; |
| u8 parent_uuid[BTRFS_UUID_SIZE]; |
| u8 received_uuid[BTRFS_UUID_SIZE]; |
| __le64 ctransid; /* updated when an inode changes */ |
| __le64 otransid; /* trans when created */ |
| __le64 stransid; /* trans when sent. non-zero for received subvol */ |
| __le64 rtransid; /* trans when received. non-zero for received subvol */ |
| struct btrfs_timespec ctime; |
| struct btrfs_timespec otime; |
| struct btrfs_timespec stime; |
| struct btrfs_timespec rtime; |
| __le64 reserved[8]; /* for future */ |
| } __attribute__ ((__packed__)); |
| |
| /* |
| * this is used for both forward and backward root refs |
| */ |
| struct btrfs_root_ref { |
| __le64 dirid; |
| __le64 sequence; |
| __le16 name_len; |
| } __attribute__ ((__packed__)); |
| |
| #define BTRFS_FILE_EXTENT_INLINE 0 |
| #define BTRFS_FILE_EXTENT_REG 1 |
| #define BTRFS_FILE_EXTENT_PREALLOC 2 |
| |
| struct btrfs_file_extent_item { |
| /* |
| * transaction id that created this extent |
| */ |
| __le64 generation; |
| /* |
| * max number of bytes to hold this extent in ram |
| * when we split a compressed extent we can't know how big |
| * each of the resulting pieces will be. So, this is |
| * an upper limit on the size of the extent in ram instead of |
| * an exact limit. |
| */ |
| __le64 ram_bytes; |
| |
| /* |
| * 32 bits for the various ways we might encode the data, |
| * including compression and encryption. If any of these |
| * are set to something a given disk format doesn't understand |
| * it is treated like an incompat flag for reading and writing, |
| * but not for stat. |
| */ |
| u8 compression; |
| u8 encryption; |
| __le16 other_encoding; /* spare for later use */ |
| |
| /* are we inline data or a real extent? */ |
| u8 type; |
| |
| /* |
| * disk space consumed by the extent, checksum blocks are included |
| * in these numbers |
| */ |
| __le64 disk_bytenr; |
| __le64 disk_num_bytes; |
| /* |
| * 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_bytes; |
| |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_csum_item { |
| u8 csum; |
| } __attribute__ ((__packed__)); |
| |
| /* |
| * We don't want to overwrite 1M at the beginning of device, even though |
| * there is our 1st superblock at 64k. Some possible reasons: |
| * - the first 64k blank is useful for some boot loader/manager |
| * - the first 1M could be scratched by buggy partitioner or somesuch |
| */ |
| #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)1024 * 1024) |
| |
| /* tag for the radix tree of block groups in ram */ |
| #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0) |
| #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1) |
| #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2) |
| #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3) |
| #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4) |
| #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5) |
| #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6) |
| #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7) |
| #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8) |
| #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE |
| |
| #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \ |
| BTRFS_BLOCK_GROUP_SYSTEM | \ |
| BTRFS_BLOCK_GROUP_METADATA) |
| |
| #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \ |
| BTRFS_BLOCK_GROUP_RAID1 | \ |
| BTRFS_BLOCK_GROUP_RAID5 | \ |
| BTRFS_BLOCK_GROUP_RAID6 | \ |
| BTRFS_BLOCK_GROUP_DUP | \ |
| BTRFS_BLOCK_GROUP_RAID10) |
| |
| /* used in struct btrfs_balance_args fields */ |
| #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48) |
| |
| /* |
| * GLOBAL_RSV does not exist as a on-disk block group type and is used |
| * internally for exporting info about global block reserve from space infos |
| */ |
| #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49) |
| |
| #define BTRFS_QGROUP_STATUS_OFF 0 |
| #define BTRFS_QGROUP_STATUS_ON 1 |
| #define BTRFS_QGROUP_STATUS_SCANNING 2 |
| |
| #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1 << 0) |
| |
| struct btrfs_qgroup_status_item { |
| __le64 version; |
| __le64 generation; |
| __le64 flags; |
| __le64 scan; /* progress during scanning */ |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_block_group_item { |
| __le64 used; |
| __le64 chunk_objectid; |
| __le64 flags; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_qgroup_info_item { |
| __le64 generation; |
| __le64 referenced; |
| __le64 referenced_compressed; |
| __le64 exclusive; |
| __le64 exclusive_compressed; |
| } __attribute__ ((__packed__)); |
| |
| /* flags definition for qgroup limits */ |
| #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0) |
| #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1) |
| #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2) |
| #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3) |
| #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4) |
| #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5) |
| |
| struct btrfs_qgroup_limit_item { |
| __le64 flags; |
| __le64 max_referenced; |
| __le64 max_exclusive; |
| __le64 rsv_referenced; |
| __le64 rsv_exclusive; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_space_info { |
| u64 flags; |
| u64 total_bytes; |
| u64 bytes_used; |
| u64 bytes_pinned; |
| int full; |
| struct list_head list; |
| }; |
| |
| struct btrfs_block_group_cache { |
| struct cache_extent cache; |
| struct btrfs_key key; |
| struct btrfs_block_group_item item; |
| struct btrfs_space_info *space_info; |
| struct btrfs_free_space_ctl *free_space_ctl; |
| u64 pinned; |
| u64 flags; |
| int cached; |
| int ro; |
| }; |
| |
| struct btrfs_extent_ops { |
| int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes, |
| u64 hint_byte, struct btrfs_key *ins); |
| int (*free_extent)(struct btrfs_root *root, u64 bytenr, |
| u64 num_bytes); |
| }; |
| |
| struct btrfs_device; |
| struct btrfs_fs_devices; |
| struct btrfs_fs_info { |
| u8 fsid[BTRFS_FSID_SIZE]; |
| u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
| struct btrfs_root *fs_root; |
| struct btrfs_root *extent_root; |
| struct btrfs_root *tree_root; |
| struct btrfs_root *chunk_root; |
| struct btrfs_root *dev_root; |
| struct btrfs_root *csum_root; |
| struct btrfs_root *quota_root; |
| |
| struct rb_root fs_root_tree; |
| |
| /* the log root tree is a directory of all the other log roots */ |
| struct btrfs_root *log_root_tree; |
| |
| struct extent_io_tree extent_cache; |
| struct extent_io_tree free_space_cache; |
| struct extent_io_tree block_group_cache; |
| struct extent_io_tree pinned_extents; |
| struct extent_io_tree pending_del; |
| struct extent_io_tree extent_ins; |
| |
| /* logical->physical extent mapping */ |
| struct btrfs_mapping_tree mapping_tree; |
| |
| u64 generation; |
| u64 last_trans_committed; |
| |
| u64 avail_data_alloc_bits; |
| u64 avail_metadata_alloc_bits; |
| u64 avail_system_alloc_bits; |
| u64 data_alloc_profile; |
| u64 metadata_alloc_profile; |
| u64 system_alloc_profile; |
| u64 alloc_start; |
| |
| struct btrfs_trans_handle *running_transaction; |
| struct btrfs_super_block *super_copy; |
| struct mutex fs_mutex; |
| |
| u64 super_bytenr; |
| u64 total_pinned; |
| |
| struct btrfs_extent_ops *extent_ops; |
| struct list_head dirty_cowonly_roots; |
| struct list_head recow_ebs; |
| |
| struct btrfs_fs_devices *fs_devices; |
| struct list_head space_info; |
| int system_allocs; |
| |
| unsigned int readonly:1; |
| unsigned int on_restoring:1; |
| unsigned int is_chunk_recover:1; |
| unsigned int quota_enabled:1; |
| |
| int (*free_extent_hook)(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| u64 bytenr, u64 num_bytes, u64 parent, |
| u64 root_objectid, u64 owner, u64 offset, |
| int refs_to_drop); |
| struct cache_tree *fsck_extent_cache; |
| struct cache_tree *corrupt_blocks; |
| }; |
| |
| /* |
| * 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 extent_buffer *node; |
| struct extent_buffer *commit_root; |
| struct btrfs_root_item root_item; |
| struct btrfs_key root_key; |
| struct btrfs_fs_info *fs_info; |
| u64 objectid; |
| u64 last_trans; |
| |
| /* data allocations are done in sectorsize units */ |
| u32 sectorsize; |
| |
| /* node allocations are done in nodesize units */ |
| u32 nodesize; |
| |
| /* leaf allocations are done in leafsize units */ |
| u32 leafsize; |
| |
| /* leaf allocations are done in leafsize units */ |
| u32 stripesize; |
| |
| int ref_cows; |
| int track_dirty; |
| |
| |
| u32 type; |
| u64 highest_inode; |
| u64 last_inode_alloc; |
| |
| /* the dirty list is only used by non-reference counted roots */ |
| struct list_head dirty_list; |
| struct rb_node rb_node; |
| }; |
| |
| /* |
| * 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 |
| #define BTRFS_INODE_REF_KEY 12 |
| #define BTRFS_INODE_EXTREF_KEY 13 |
| #define BTRFS_XATTR_ITEM_KEY 24 |
| #define BTRFS_ORPHAN_ITEM_KEY 48 |
| |
| #define BTRFS_DIR_LOG_ITEM_KEY 60 |
| #define BTRFS_DIR_LOG_INDEX_KEY 72 |
| /* |
| * dir items are the name -> inode pointers in a directory. There is one |
| * for every name in a directory. |
| */ |
| #define BTRFS_DIR_ITEM_KEY 84 |
| #define BTRFS_DIR_INDEX_KEY 96 |
| |
| /* |
| * extent data is for file data |
| */ |
| #define BTRFS_EXTENT_DATA_KEY 108 |
| |
| /* |
| * csum items have the checksums for data in the extents |
| */ |
| #define BTRFS_CSUM_ITEM_KEY 120 |
| /* |
| * extent csums are stored in a separate tree and hold csums for |
| * an entire extent on disk. |
| */ |
| #define BTRFS_EXTENT_CSUM_KEY 128 |
| |
| /* |
| * 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 132 |
| |
| /* |
| * root backrefs tie subvols and snapshots to the directory entries that |
| * reference them |
| */ |
| #define BTRFS_ROOT_BACKREF_KEY 144 |
| |
| /* |
| * root refs make a fast index for listing all of the snapshots and |
| * subvolumes referenced by a given root. They point directly to the |
| * directory item in the root that references the subvol |
| */ |
| #define BTRFS_ROOT_REF_KEY 156 |
| |
| /* |
| * 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 168 |
| |
| /* |
| * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know |
| * the length, so we save the level in key->offset instead of the length. |
| */ |
| #define BTRFS_METADATA_ITEM_KEY 169 |
| |
| #define BTRFS_TREE_BLOCK_REF_KEY 176 |
| |
| #define BTRFS_EXTENT_DATA_REF_KEY 178 |
| |
| /* old style extent backrefs */ |
| #define BTRFS_EXTENT_REF_V0_KEY 180 |
| |
| #define BTRFS_SHARED_BLOCK_REF_KEY 182 |
| |
| #define BTRFS_SHARED_DATA_REF_KEY 184 |
| |
| |
| /* |
| * block groups give us hints into the extent allocation trees. Which |
| * blocks are free etc etc |
| */ |
| #define BTRFS_BLOCK_GROUP_ITEM_KEY 192 |
| |
| #define BTRFS_DEV_EXTENT_KEY 204 |
| #define BTRFS_DEV_ITEM_KEY 216 |
| #define BTRFS_CHUNK_ITEM_KEY 228 |
| |
| #define BTRFS_BALANCE_ITEM_KEY 248 |
| |
| /* |
| * quota groups |
| */ |
| #define BTRFS_QGROUP_STATUS_KEY 240 |
| #define BTRFS_QGROUP_INFO_KEY 242 |
| #define BTRFS_QGROUP_LIMIT_KEY 244 |
| #define BTRFS_QGROUP_RELATION_KEY 246 |
| |
| /* |
| * Persistently stores the io stats in the device tree. |
| * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid). |
| */ |
| #define BTRFS_DEV_STATS_KEY 249 |
| |
| /* |
| * Persistently stores the device replace state in the device tree. |
| * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0). |
| */ |
| #define BTRFS_DEV_REPLACE_KEY 250 |
| |
| /* |
| * Stores items that allow to quickly map UUIDs to something else. |
| * These items are part of the filesystem UUID tree. |
| * The key is built like this: |
| * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits). |
| */ |
| #if BTRFS_UUID_SIZE != 16 |
| #error "UUID items require BTRFS_UUID_SIZE == 16!" |
| #endif |
| #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */ |
| #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to |
| * received subvols */ |
| |
| /* |
| * string items are for debugging. They just store a short string of |
| * data in the FS |
| */ |
| #define BTRFS_STRING_ITEM_KEY 253 |
| /* |
| * Inode flags |
| */ |
| #define BTRFS_INODE_NODATASUM (1 << 0) |
| #define BTRFS_INODE_NODATACOW (1 << 1) |
| #define BTRFS_INODE_READONLY (1 << 2) |
| |
| #define read_eb_member(eb, ptr, type, member, result) ( \ |
| read_extent_buffer(eb, (char *)(result), \ |
| ((unsigned long)(ptr)) + \ |
| offsetof(type, member), \ |
| sizeof(((type *)0)->member))) |
| |
| #define write_eb_member(eb, ptr, type, member, result) ( \ |
| write_extent_buffer(eb, (char *)(result), \ |
| ((unsigned long)(ptr)) + \ |
| offsetof(type, member), \ |
| sizeof(((type *)0)->member))) |
| |
| #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ |
| static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ |
| { \ |
| const struct btrfs_header *h = (struct btrfs_header *)eb->data; \ |
| return le##bits##_to_cpu(h->member); \ |
| } \ |
| static inline void btrfs_set_##name(struct extent_buffer *eb, \ |
| u##bits val) \ |
| { \ |
| struct btrfs_header *h = (struct btrfs_header *)eb->data; \ |
| h->member = cpu_to_le##bits(val); \ |
| } |
| |
| #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ |
| static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ |
| const type *s) \ |
| { \ |
| unsigned long offset = (unsigned long)s; \ |
| const type *p = (type *) (eb->data + offset); \ |
| return get_unaligned_le##bits(&p->member); \ |
| } \ |
| static inline void btrfs_set_##name(struct extent_buffer *eb, \ |
| type *s, u##bits val) \ |
| { \ |
| unsigned long offset = (unsigned long)s; \ |
| type *p = (type *) (eb->data + offset); \ |
| put_unaligned_le##bits(val, &p->member); \ |
| } |
| |
| #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ |
| static inline u##bits btrfs_##name(const type *s) \ |
| { \ |
| return le##bits##_to_cpu(s->member); \ |
| } \ |
| static inline void btrfs_set_##name(type *s, u##bits val) \ |
| { \ |
| s->member = cpu_to_le##bits(val); \ |
| } |
| |
| BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); |
| BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); |
| BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); |
| BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); |
| BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); |
| BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, |
| start_offset, 64); |
| BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); |
| BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); |
| BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); |
| BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); |
| BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); |
| BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); |
| |
| BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, |
| total_bytes, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, |
| bytes_used, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, |
| io_align, 32); |
| BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, |
| io_width, 32); |
| BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, |
| sector_size, 32); |
| BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, |
| dev_group, 32); |
| BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, |
| seek_speed, 8); |
| BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, |
| bandwidth, 8); |
| BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, |
| generation, 64); |
| |
| static inline char *btrfs_device_uuid(struct btrfs_dev_item *d) |
| { |
| return (char *)d + offsetof(struct btrfs_dev_item, uuid); |
| } |
| |
| static inline char *btrfs_device_fsid(struct btrfs_dev_item *d) |
| { |
| return (char *)d + offsetof(struct btrfs_dev_item, fsid); |
| } |
| |
| BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); |
| BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); |
| BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); |
| BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); |
| BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); |
| BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); |
| BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); |
| BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); |
| BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); |
| BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); |
| BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); |
| |
| static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) |
| { |
| return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); |
| } |
| |
| BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, |
| stripe_len, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, |
| io_align, 32); |
| BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, |
| io_width, 32); |
| BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, |
| sector_size, 32); |
| BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, |
| num_stripes, 16); |
| BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, |
| sub_stripes, 16); |
| BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); |
| |
| static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, |
| int nr) |
| { |
| unsigned long offset = (unsigned long)c; |
| offset += offsetof(struct btrfs_chunk, stripe); |
| offset += nr * sizeof(struct btrfs_stripe); |
| return (struct btrfs_stripe *)offset; |
| } |
| |
| static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) |
| { |
| return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); |
| } |
| |
| static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, |
| struct btrfs_chunk *c, int nr) |
| { |
| return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); |
| } |
| |
| static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb, |
| struct btrfs_chunk *c, int nr, |
| u64 val) |
| { |
| btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val); |
| } |
| |
| static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, |
| struct btrfs_chunk *c, int nr) |
| { |
| return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); |
| } |
| |
| static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb, |
| struct btrfs_chunk *c, int nr, |
| u64 val) |
| { |
| btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val); |
| } |
| |
| /* struct btrfs_block_group_item */ |
| BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, |
| used, 64); |
| BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, |
| used, 64); |
| BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, |
| struct btrfs_block_group_item, chunk_objectid, 64); |
| |
| BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, |
| struct btrfs_block_group_item, chunk_objectid, 64); |
| BTRFS_SETGET_FUNCS(disk_block_group_flags, |
| struct btrfs_block_group_item, flags, 64); |
| BTRFS_SETGET_STACK_FUNCS(block_group_flags, |
| struct btrfs_block_group_item, flags, 64); |
| |
| /* struct btrfs_inode_ref */ |
| BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); |
| BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); |
| BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); |
| |
| /* struct btrfs_inode_extref */ |
| BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, |
| parent_objectid, 64); |
| BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, |
| name_len, 16); |
| BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); |
| |
| /* struct btrfs_inode_item */ |
| BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); |
| BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); |
| BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); |
| BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); |
| BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); |
| BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); |
| BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); |
| BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); |
| BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); |
| BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); |
| BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); |
| BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); |
| |
| BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, |
| struct btrfs_inode_item, generation, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, |
| struct btrfs_inode_item, generation, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_inode_size, |
| struct btrfs_inode_item, size, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, |
| struct btrfs_inode_item, nbytes, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, |
| struct btrfs_inode_item, block_group, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, |
| struct btrfs_inode_item, nlink, 32); |
| BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, |
| struct btrfs_inode_item, uid, 32); |
| BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, |
| struct btrfs_inode_item, gid, 32); |
| BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, |
| struct btrfs_inode_item, mode, 32); |
| BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, |
| struct btrfs_inode_item, rdev, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, |
| struct btrfs_inode_item, flags, 64); |
| |
| static inline struct btrfs_timespec * |
| btrfs_inode_atime(struct btrfs_inode_item *inode_item) |
| { |
| unsigned long ptr = (unsigned long)inode_item; |
| ptr += offsetof(struct btrfs_inode_item, atime); |
| return (struct btrfs_timespec *)ptr; |
| } |
| |
| static inline struct btrfs_timespec * |
| btrfs_inode_mtime(struct btrfs_inode_item *inode_item) |
| { |
| unsigned long ptr = (unsigned long)inode_item; |
| ptr += offsetof(struct btrfs_inode_item, mtime); |
| return (struct btrfs_timespec *)ptr; |
| } |
| |
| static inline struct btrfs_timespec * |
| btrfs_inode_ctime(struct btrfs_inode_item *inode_item) |
| { |
| unsigned long ptr = (unsigned long)inode_item; |
| ptr += offsetof(struct btrfs_inode_item, ctime); |
| return (struct btrfs_timespec *)ptr; |
| } |
| |
| static inline struct btrfs_timespec * |
| btrfs_inode_otime(struct btrfs_inode_item *inode_item) |
| { |
| unsigned long ptr = (unsigned long)inode_item; |
| ptr += offsetof(struct btrfs_inode_item, otime); |
| return (struct btrfs_timespec *)ptr; |
| } |
| |
| BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); |
| BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); |
| BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, |
| sec, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, |
| nsec, 32); |
| |
| /* struct btrfs_dev_extent */ |
| BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, |
| chunk_tree, 64); |
| BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, |
| chunk_objectid, 64); |
| BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, |
| chunk_offset, 64); |
| BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); |
| |
| static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) |
| { |
| unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); |
| return (u8 *)((unsigned long)dev + ptr); |
| } |
| |
| |
| /* struct btrfs_extent_item */ |
| BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64); |
| BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, |
| generation, 64); |
| BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64); |
| |
| BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); |
| |
| BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); |
| |
| static inline void btrfs_tree_block_key(struct extent_buffer *eb, |
| struct btrfs_tree_block_info *item, |
| struct btrfs_disk_key *key) |
| { |
| read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); |
| } |
| |
| static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, |
| struct btrfs_tree_block_info *item, |
| struct btrfs_disk_key *key) |
| { |
| write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); |
| } |
| |
| BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, |
| root, 64); |
| BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, |
| objectid, 64); |
| BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, |
| offset, 64); |
| BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, |
| count, 32); |
| |
| BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, |
| count, 32); |
| |
| BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, |
| type, 8); |
| BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, |
| offset, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type, |
| struct btrfs_extent_inline_ref, type, 8); |
| BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset, |
| struct btrfs_extent_inline_ref, offset, 64); |
| |
| static inline u32 btrfs_extent_inline_ref_size(int type) |
| { |
| if (type == BTRFS_TREE_BLOCK_REF_KEY || |
| type == BTRFS_SHARED_BLOCK_REF_KEY) |
| return sizeof(struct btrfs_extent_inline_ref); |
| if (type == BTRFS_SHARED_DATA_REF_KEY) |
| return sizeof(struct btrfs_shared_data_ref) + |
| sizeof(struct btrfs_extent_inline_ref); |
| if (type == BTRFS_EXTENT_DATA_REF_KEY) |
| return sizeof(struct btrfs_extent_data_ref) + |
| offsetof(struct btrfs_extent_inline_ref, offset); |
| BUG(); |
| return 0; |
| } |
| |
| BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); |
| BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, |
| generation, 64); |
| BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); |
| BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); |
| |
| /* struct btrfs_node */ |
| BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); |
| BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); |
| |
| static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) |
| { |
| unsigned long ptr; |
| ptr = offsetof(struct btrfs_node, ptrs) + |
| sizeof(struct btrfs_key_ptr) * nr; |
| return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); |
| } |
| |
| static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, |
| int nr, u64 val) |
| { |
| unsigned long ptr; |
| ptr = offsetof(struct btrfs_node, ptrs) + |
| sizeof(struct btrfs_key_ptr) * nr; |
| btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); |
| } |
| |
| static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) |
| { |
| unsigned long ptr; |
| ptr = offsetof(struct btrfs_node, ptrs) + |
| sizeof(struct btrfs_key_ptr) * nr; |
| return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); |
| } |
| |
| static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, |
| int nr, u64 val) |
| { |
| unsigned long ptr; |
| ptr = offsetof(struct btrfs_node, ptrs) + |
| sizeof(struct btrfs_key_ptr) * nr; |
| btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); |
| } |
| |
| static inline unsigned long btrfs_node_key_ptr_offset(int nr) |
| { |
| return offsetof(struct btrfs_node, ptrs) + |
| sizeof(struct btrfs_key_ptr) * nr; |
| } |
| |
| static inline void btrfs_node_key(struct extent_buffer *eb, |
| struct btrfs_disk_key *disk_key, int nr) |
| { |
| unsigned long ptr; |
| ptr = btrfs_node_key_ptr_offset(nr); |
| read_eb_member(eb, (struct btrfs_key_ptr *)ptr, |
| struct btrfs_key_ptr, key, disk_key); |
| } |
| |
| static inline void btrfs_set_node_key(struct extent_buffer *eb, |
| struct btrfs_disk_key *disk_key, int nr) |
| { |
| unsigned long ptr; |
| ptr = btrfs_node_key_ptr_offset(nr); |
| write_eb_member(eb, (struct btrfs_key_ptr *)ptr, |
| struct btrfs_key_ptr, key, disk_key); |
| } |
| |
| /* struct btrfs_item */ |
| BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); |
| BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); |
| |
| static inline unsigned long btrfs_item_nr_offset(int nr) |
| { |
| return offsetof(struct btrfs_leaf, items) + |
| sizeof(struct btrfs_item) * nr; |
| } |
| |
| static inline struct btrfs_item *btrfs_item_nr(int nr) |
| { |
| return (struct btrfs_item *)btrfs_item_nr_offset(nr); |
| } |
| |
| static inline u32 btrfs_item_end(struct extent_buffer *eb, |
| struct btrfs_item *item) |
| { |
| return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); |
| } |
| |
| static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) |
| { |
| return btrfs_item_end(eb, btrfs_item_nr(nr)); |
| } |
| |
| static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) |
| { |
| return btrfs_item_offset(eb, btrfs_item_nr(nr)); |
| } |
| |
| static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) |
| { |
| return btrfs_item_size(eb, btrfs_item_nr(nr)); |
| } |
| |
| static inline void btrfs_item_key(struct extent_buffer *eb, |
| struct btrfs_disk_key *disk_key, int nr) |
| { |
| struct btrfs_item *item = btrfs_item_nr(nr); |
| read_eb_member(eb, item, struct btrfs_item, key, disk_key); |
| } |
| |
| static inline void btrfs_set_item_key(struct extent_buffer *eb, |
| struct btrfs_disk_key *disk_key, int nr) |
| { |
| struct btrfs_item *item = btrfs_item_nr(nr); |
| write_eb_member(eb, item, struct btrfs_item, key, disk_key); |
| } |
| |
| BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); |
| |
| /* |
| * struct btrfs_root_ref |
| */ |
| BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); |
| BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); |
| BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); |
| |
| BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16); |
| |
| /* struct btrfs_dir_item */ |
| BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); |
| BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); |
| BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); |
| BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); |
| |
| BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16); |
| |
| static inline void btrfs_dir_item_key(struct extent_buffer *eb, |
| struct btrfs_dir_item *item, |
| struct btrfs_disk_key *key) |
| { |
| read_eb_member(eb, item, struct btrfs_dir_item, location, key); |
| } |
| |
| static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, |
| struct btrfs_dir_item *item, |
| struct btrfs_disk_key *key) |
| { |
| write_eb_member(eb, item, struct btrfs_dir_item, location, key); |
| } |
| |
| /* struct btrfs_free_space_header */ |
| BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, |
| num_entries, 64); |
| BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, |
| num_bitmaps, 64); |
| BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, |
| generation, 64); |
| |
| static inline void btrfs_free_space_key(struct extent_buffer *eb, |
| struct btrfs_free_space_header *h, |
| struct btrfs_disk_key *key) |
| { |
| read_eb_member(eb, h, struct btrfs_free_space_header, location, key); |
| } |
| |
| static inline void btrfs_set_free_space_key(struct extent_buffer *eb, |
| struct btrfs_free_space_header *h, |
| struct btrfs_disk_key *key) |
| { |
| write_eb_member(eb, h, struct btrfs_free_space_header, location, key); |
| } |
| |
| /* struct btrfs_disk_key */ |
| BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, |
| objectid, 64); |
| BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); |
| BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); |
| |
| static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
| struct btrfs_disk_key *disk) |
| { |
| cpu->offset = le64_to_cpu(disk->offset); |
| cpu->type = disk->type; |
| cpu->objectid = le64_to_cpu(disk->objectid); |
| } |
| |
| static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, |
| struct btrfs_key *cpu) |
| { |
| disk->offset = cpu_to_le64(cpu->offset); |
| disk->type = cpu->type; |
| disk->objectid = cpu_to_le64(cpu->objectid); |
| } |
| |
| static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, |
| struct btrfs_key *key, int nr) |
| { |
| struct btrfs_disk_key disk_key; |
| btrfs_node_key(eb, &disk_key, nr); |
| btrfs_disk_key_to_cpu(key, &disk_key); |
| } |
| |
| static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, |
| struct btrfs_key *key, int nr) |
| { |
| struct btrfs_disk_key disk_key; |
| btrfs_item_key(eb, &disk_key, nr); |
| btrfs_disk_key_to_cpu(key, &disk_key); |
| } |
| |
| static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, |
| struct btrfs_dir_item *item, |
| struct btrfs_key *key) |
| { |
| struct btrfs_disk_key disk_key; |
| btrfs_dir_item_key(eb, item, &disk_key); |
| btrfs_disk_key_to_cpu(key, &disk_key); |
| } |
| |
| |
| static inline u8 btrfs_key_type(struct btrfs_key *key) |
| { |
| return key->type; |
| } |
| |
| static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) |
| { |
| key->type = val; |
| } |
| |
| /* struct btrfs_header */ |
| BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); |
| BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, |
| generation, 64); |
| BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); |
| BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); |
| BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); |
| BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); |
| BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems, |
| 32); |
| BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, |
| generation, 64); |
| |
| static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) |
| { |
| return (btrfs_header_flags(eb) & flag) == flag; |
| } |
| |
| static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) |
| { |
| u64 flags = btrfs_header_flags(eb); |
| btrfs_set_header_flags(eb, flags | flag); |
| return (flags & flag) == flag; |
| } |
| |
| static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) |
| { |
| u64 flags = btrfs_header_flags(eb); |
| btrfs_set_header_flags(eb, flags & ~flag); |
| return (flags & flag) == flag; |
| } |
| |
| static inline int btrfs_header_backref_rev(struct extent_buffer *eb) |
| { |
| u64 flags = btrfs_header_flags(eb); |
| return flags >> BTRFS_BACKREF_REV_SHIFT; |
| } |
| |
| static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, |
| int rev) |
| { |
| u64 flags = btrfs_header_flags(eb); |
| flags &= ~BTRFS_BACKREF_REV_MASK; |
| flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; |
| btrfs_set_header_flags(eb, flags); |
| } |
| |
| static inline unsigned long btrfs_header_fsid(void) |
| { |
| return offsetof(struct btrfs_header, fsid); |
| } |
| |
| static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb) |
| { |
| return offsetof(struct btrfs_header, chunk_tree_uuid); |
| } |
| |
| static inline u8 *btrfs_super_fsid(struct extent_buffer *eb) |
| { |
| unsigned long ptr = offsetof(struct btrfs_super_block, fsid); |
| return (u8 *)ptr; |
| } |
| |
| static inline u8 *btrfs_header_csum(struct extent_buffer *eb) |
| { |
| unsigned long ptr = offsetof(struct btrfs_header, csum); |
| return (u8 *)ptr; |
| } |
| |
| static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb) |
| { |
| return NULL; |
| } |
| |
| static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb) |
| { |
| return NULL; |
| } |
| |
| static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb) |
| { |
| return NULL; |
| } |
| |
| static inline int btrfs_is_leaf(struct extent_buffer *eb) |
| { |
| return (btrfs_header_level(eb) == 0); |
| } |
| |
| /* struct btrfs_root_item */ |
| BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, |
| generation, 64); |
| BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); |
| BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); |
| BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); |
| |
| BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, |
| generation, 64); |
| BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); |
| BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); |
| BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); |
| BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); |
| BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); |
| BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); |
| BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); |
| BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, |
| last_snapshot, 64); |
| BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, |
| generation_v2, 64); |
| BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, |
| ctransid, 64); |
| BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, |
| otransid, 64); |
| BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, |
| stransid, 64); |
| BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, |
| rtransid, 64); |
| |
| /* struct btrfs_root_backup */ |
| BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, |
| tree_root, 64); |
| BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, |
| tree_root_gen, 64); |
| BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, |
| tree_root_level, 8); |
| |
| BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, |
| chunk_root, 64); |
| BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, |
| chunk_root_gen, 64); |
| BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, |
| chunk_root_level, 8); |
| |
| BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, |
| extent_root, 64); |
| BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, |
| extent_root_gen, 64); |
| BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, |
| extent_root_level, 8); |
| |
| BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, |
| fs_root, 64); |
| BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, |
| fs_root_gen, 64); |
| BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, |
| fs_root_level, 8); |
| |
| BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, |
| dev_root, 64); |
| BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, |
| dev_root_gen, 64); |
| BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, |
| dev_root_level, 8); |
| |
| BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, |
| csum_root, 64); |
| BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, |
| csum_root_gen, 64); |
| BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, |
| csum_root_level, 8); |
| BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, |
| total_bytes, 64); |
| BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, |
| bytes_used, 64); |
| BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, |
| num_devices, 64); |
| |
| /* struct btrfs_super_block */ |
| |
| BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); |
| BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); |
| BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, |
| generation, 64); |
| BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); |
| BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, |
| struct btrfs_super_block, sys_chunk_array_size, 32); |
| BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, |
| struct btrfs_super_block, chunk_root_generation, 64); |
| BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, |
| root_level, 8); |
| BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, |
| chunk_root, 64); |
| BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, |
| chunk_root_level, 8); |
| BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, |
| log_root, 64); |
| BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, |
| log_root_transid, 64); |
| BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, |
| log_root_level, 8); |
| BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, |
| total_bytes, 64); |
| BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, |
| bytes_used, 64); |
| BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, |
| sectorsize, 32); |
| BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, |
| nodesize, 32); |
| BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, |
| leafsize, 32); |
| BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, |
| stripesize, 32); |
| BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, |
| root_dir_objectid, 64); |
| BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, |
| num_devices, 64); |
| BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, |
| compat_flags, 64); |
| BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, |
| compat_ro_flags, 64); |
| BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, |
| incompat_flags, 64); |
| BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, |
| csum_type, 16); |
| BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, |
| cache_generation, 64); |
| BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, |
| uuid_tree_generation, 64); |
| BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); |
| |
| static inline int btrfs_super_csum_size(struct btrfs_super_block *s) |
| { |
| int t = btrfs_super_csum_type(s); |
| BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes)); |
| return btrfs_csum_sizes[t]; |
| } |
| |
| static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) |
| { |
| return offsetof(struct btrfs_leaf, items); |
| } |
| |
| /* struct btrfs_file_extent_item */ |
| BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); |
| BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8); |
| |
| static inline unsigned long btrfs_file_extent_inline_start(struct |
| btrfs_file_extent_item *e) |
| { |
| unsigned long offset = (unsigned long)e; |
| offset += offsetof(struct btrfs_file_extent_item, disk_bytenr); |
| return offset; |
| } |
| |
| static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) |
| { |
| return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize; |
| } |
| |
| BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, |
| disk_bytenr, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item, |
| disk_bytenr, 64); |
| BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, |
| generation, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item, |
| generation, 64); |
| BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, |
| disk_num_bytes, 64); |
| BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, |
| offset, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item, |
| offset, 64); |
| BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, |
| num_bytes, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item, |
| num_bytes, 64); |
| BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, |
| ram_bytes, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item, |
| ram_bytes, 64); |
| BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, |
| compression, 8); |
| BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item, |
| compression, 8); |
| BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, |
| encryption, 8); |
| BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, |
| other_encoding, 16); |
| |
| /* btrfs_qgroup_status_item */ |
| BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, |
| version, 64); |
| BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, |
| generation, 64); |
| BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, |
| flags, 64); |
| BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item, |
| scan, 64); |
| |
| /* btrfs_qgroup_info_item */ |
| BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, |
| generation, 64); |
| BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item, |
| referenced, 64); |
| BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed, |
| struct btrfs_qgroup_info_item, referenced_compressed, 64); |
| BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item, |
| exclusive, 64); |
| BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed, |
| struct btrfs_qgroup_info_item, exclusive_compressed, 64); |
| |
| BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, |
| struct btrfs_qgroup_info_item, generation, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced, |
| struct btrfs_qgroup_info_item, referenced, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed, |
| struct btrfs_qgroup_info_item, referenced_compressed, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive, |
| struct btrfs_qgroup_info_item, exclusive, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed, |
| struct btrfs_qgroup_info_item, exclusive_compressed, 64); |
| |
| /* btrfs_qgroup_limit_item */ |
| BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, |
| flags, 64); |
| BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item, |
| max_referenced, 64); |
| BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item, |
| max_exclusive, 64); |
| BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item, |
| rsv_referenced, 64); |
| BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item, |
| rsv_exclusive, 64); |
| |
| BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags, |
| struct btrfs_qgroup_limit_item, flags, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced, |
| struct btrfs_qgroup_limit_item, max_referenced, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive, |
| struct btrfs_qgroup_limit_item, max_exclusive, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced, |
| struct btrfs_qgroup_limit_item, rsv_referenced, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive, |
| struct btrfs_qgroup_limit_item, rsv_exclusive, 64); |
| |
| /* |
| * this returns the number of bytes used by the item on disk, minus the |
| * size of any extent headers. If a file is compressed on disk, this is |
| * the compressed size |
| */ |
| static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb, |
| struct btrfs_item *e) |
| { |
| unsigned long offset; |
| offset = offsetof(struct btrfs_file_extent_item, disk_bytenr); |
| return btrfs_item_size(eb, e) - offset; |
| } |
| |
| /* this returns the number of file bytes represented by the inline item. |
| * If an item is compressed, this is the uncompressed size |
| */ |
| static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, |
| int slot, |
| struct btrfs_file_extent_item *fi) |
| { |
| /* |
| * return the space used on disk if this item isn't |
| * compressed or encoded |
| */ |
| if (btrfs_file_extent_compression(eb, fi) == 0 && |
| btrfs_file_extent_encryption(eb, fi) == 0 && |
| btrfs_file_extent_other_encoding(eb, fi) == 0) { |
| return btrfs_file_extent_inline_item_len(eb, |
| btrfs_item_nr(slot)); |
| } |
| |
| /* otherwise use the ram bytes field */ |
| return btrfs_file_extent_ram_bytes(eb, fi); |
| } |
| |
| static inline u32 btrfs_level_size(struct btrfs_root *root, int level) { |
| if (level == 0) |
| return root->leafsize; |
| return root->nodesize; |
| } |
| |
| static inline int btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) |
| { |
| struct btrfs_super_block *disk_super; |
| disk_super = fs_info->super_copy; |
| return !!(btrfs_super_incompat_flags(disk_super) & flag); |
| } |
| |
| /* helper function to cast into the data area of the leaf. */ |
| #define btrfs_item_ptr(leaf, slot, type) \ |
| ((type *)(btrfs_leaf_data(leaf) + \ |
| btrfs_item_offset_nr(leaf, slot))) |
| |
| #define btrfs_item_ptr_offset(leaf, slot) \ |
| ((unsigned long)(btrfs_leaf_data(leaf) + \ |
| btrfs_item_offset_nr(leaf, slot))) |
| |
| /* extent-tree.c */ |
| int btrfs_reserve_extent(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| u64 num_bytes, u64 empty_size, |
| u64 hint_byte, u64 search_end, |
| struct btrfs_key *ins, int data); |
| int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root); |
| void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes); |
| void btrfs_unpin_extent(struct btrfs_fs_info *fs_info, |
| u64 bytenr, u64 num_bytes); |
| int btrfs_extent_post_op(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root); |
| struct btrfs_block_group_cache *btrfs_lookup_block_group(struct |
| btrfs_fs_info *info, |
| u64 bytenr); |
| struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct |
| btrfs_fs_info *info, |
| u64 bytenr); |
| struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| u32 blocksize, u64 root_objectid, |
| struct btrfs_disk_key *key, int level, |
| u64 hint, u64 empty_size); |
| int btrfs_alloc_extent(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| u64 num_bytes, u64 parent, |
| u64 root_objectid, u64 ref_generation, |
| u64 owner, u64 empty_size, u64 hint_byte, |
| u64 search_end, struct btrfs_key *ins, int data); |
| int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, u64 bytenr, |
| u64 offset, int metadata, u64 *refs, u64 *flags); |
| int btrfs_set_block_flags(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| u64 bytenr, int level, u64 flags); |
| int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| struct extent_buffer *buf, int record_parent); |
| int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| struct extent_buffer *buf, int record_parent); |
| int btrfs_free_extent(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| u64 bytenr, u64 num_bytes, u64 parent, |
| u64 root_objectid, u64 owner, u64 offset); |
| int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct extent_io_tree *unpin); |
| int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| u64 bytenr, u64 num_bytes, u64 parent, |
| u64 root_objectid, u64 ref_generation, |
| u64 owner_objectid); |
| int btrfs_update_extent_ref(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, u64 bytenr, |
| u64 orig_parent, u64 parent, |
| u64 root_objectid, u64 ref_generation, |
| u64 owner_objectid); |
| 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); |
| struct btrfs_block_group_cache * |
| btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type, |
| u64 chunk_objectid, u64 chunk_offset, u64 size); |
| int btrfs_make_block_group(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, u64 bytes_used, |
| u64 type, u64 chunk_objectid, u64 chunk_offset, |
| u64 size); |
| int btrfs_make_block_groups(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root); |
| int btrfs_update_block_group(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, u64 bytenr, u64 num, |
| int alloc, int mark_free); |
| int btrfs_record_file_extent(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, u64 objectid, |
| struct btrfs_inode_item *inode, |
| u64 file_pos, u64 disk_bytenr, |
| u64 num_bytes); |
| /* ctree.c */ |
| int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2); |
| int btrfs_del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| struct btrfs_path *path, int level, int slot); |
| enum btrfs_tree_block_status |
| btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key, |
| struct extent_buffer *buf); |
| enum btrfs_tree_block_status |
| btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key, |
| struct extent_buffer *buf); |
| void reada_for_search(struct btrfs_root *root, struct btrfs_path *path, |
| int level, int slot, u64 objectid); |
| struct extent_buffer *read_node_slot(struct btrfs_root *root, |
| struct extent_buffer *parent, int slot); |
| int btrfs_previous_item(struct btrfs_root *root, |
| struct btrfs_path *path, u64 min_objectid, |
| int type); |
| int btrfs_previous_extent_item(struct btrfs_root *root, |
| struct btrfs_path *path, u64 min_objectid); |
| int btrfs_cow_block(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, struct extent_buffer *buf, |
| struct extent_buffer *parent, int parent_slot, |
| struct extent_buffer **cow_ret); |
| int __btrfs_cow_block(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct extent_buffer *buf, |
| struct extent_buffer *parent, int parent_slot, |
| struct extent_buffer **cow_ret, |
| u64 search_start, u64 empty_size); |
| int btrfs_copy_root(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct extent_buffer *buf, |
| struct extent_buffer **cow_ret, u64 new_root_objectid); |
| int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| *root, struct btrfs_path *path, u32 data_size); |
| int btrfs_truncate_item(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct btrfs_path *path, |
| u32 new_size, int from_end); |
| int btrfs_split_item(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct btrfs_path *path, |
| struct btrfs_key *new_key, |
| unsigned long split_offset); |
| int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
| *root, struct btrfs_key *key, struct btrfs_path *p, int |
| ins_len, int cow); |
| int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path, |
| u64 iobjectid, u64 ioff, u8 key_type, |
| struct btrfs_key *found_key); |
| void btrfs_release_path(struct btrfs_path *p); |
| void add_root_to_dirty_list(struct btrfs_root *root); |
| 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_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| struct btrfs_path *path, int slot, int nr); |
| |
| static inline int btrfs_del_item(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct btrfs_path *path) |
| { |
| return btrfs_del_items(trans, root, path, path->slots[0], 1); |
| } |
| |
| 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_items(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct btrfs_path *path, |
| struct btrfs_key *cpu_key, u32 *data_size, int nr); |
| |
| static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct btrfs_path *path, |
| struct btrfs_key *key, |
| u32 data_size) |
| { |
| return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); |
| } |
| |
| int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
| static inline int btrfs_next_item(struct btrfs_root *root, |
| struct btrfs_path *p) |
| { |
| ++p->slots[0]; |
| if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) |
| return btrfs_next_leaf(root, p); |
| return 0; |
| } |
| |
| int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); |
| int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); |
| void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path, |
| struct btrfs_disk_key *key, int level); |
| int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path, |
| struct btrfs_key *new_key); |
| void btrfs_set_item_key_unsafe(struct btrfs_root *root, |
| struct btrfs_path *path, |
| struct btrfs_key *new_key); |
| |
| /* root-item.c */ |
| int btrfs_add_root_ref(struct btrfs_trans_handle *trans, |
| struct btrfs_root *tree_root, |
| u64 root_id, u8 type, u64 ref_id, |
| u64 dirid, u64 sequence, |
| const char *name, int name_len); |
| 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, u64 index); |
| 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(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct btrfs_path *path, u64 dir, |
| const char *name, int name_len, |
| u64 index, int mod); |
| int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct btrfs_path *path, |
| struct btrfs_dir_item *di); |
| int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, const char *name, |
| u16 name_len, const void *data, u16 data_len, |
| u64 dir); |
| /* inode-map.c */ |
| int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, |
| struct btrfs_root *fs_root, |
| u64 dirid, u64 *objectid); |
| |
| /* inode-item.c */ |
| int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| const char *name, int name_len, |
| u64 inode_objectid, u64 ref_objectid, u64 index); |
| 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_del_csums(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, u64 bytenr, u64 len); |
| int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| u64 objectid, u64 pos, u64 offset, |
| u64 disk_num_bytes, |
| u64 num_bytes); |
| int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, u64 objectid, |
| u64 offset, char *buffer, size_t size); |
| int btrfs_csum_file_block(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, u64 alloc_end, |
| u64 bytenr, char *data, size_t len); |
| int btrfs_csum_truncate(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, struct btrfs_path *path, |
| u64 isize); |
| |
| /* uuid-tree.c */ |
| int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id); |
| int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid, |
| u64 *subvol_id); |
| |
| static inline int is_fstree(u64 rootid) |
| { |
| if (rootid == BTRFS_FS_TREE_OBJECTID || |
| (signed long long)rootid >= (signed long long)BTRFS_FIRST_FREE_OBJECTID) |
| return 1; |
| return 0; |
| } |
| #endif |