+/*
+ * 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__
#include "list.h"
#include "kerncompat.h"
+#include "radix-tree.h"
+#include "extent-cache.h"
+#include "extent_io.h"
+#include "ioctl.h"
+struct btrfs_root;
struct btrfs_trans_handle;
+#define BTRFS_MAGIC "_BHRfS_M"
-#define BTRFS_MAGIC "_BtRfS_M"
+#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
-#define BTRFS_DEV_TREE_OBJECTID 2ULL
-#define BTRFS_EXTENT_TREE_OBJECTID 3ULL
-#define BTRFS_FS_TREE_OBJECTID 4ULL
-#define BTRFS_ROOT_TREE_DIR_OBJECTID 5ULL
-#define BTRFS_FIRST_FREE_OBJECTID 6ULL
+
+/* 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
+
+
+/* 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
/*
* we can actually store much bigger names, but lets not confuse the rest
/* 32 bytes in various csum fields */
#define BTRFS_CSUM_SIZE 32
+/* csum types */
+#define BTRFS_CSUM_TYPE_CRC32 0
+
+
+/* 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
+
/*
* the key defines the order in the tree, and so it also defines (optimal)
* block layout. objectid corresonds to the inode number. The flags
*/
struct btrfs_disk_key {
__le64 objectid;
- __le32 flags;
+ u8 type;
__le64 offset;
} __attribute__ ((__packed__));
struct btrfs_key {
u64 objectid;
- u32 flags;
+ 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__));
+
+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[16]; /* FS specific uuid */
- __le64 blocknr; /* which block this node is supposed to live in */
+ 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;
- __le16 nritems;
- __le16 flags;
+ __le64 owner;
+ __le32 nritems;
u8 level;
} __attribute__ ((__packed__));
-#define BTRFS_MAX_LEVEL 8
-#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->blocksize - \
+#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
sizeof(struct btrfs_header)) / \
- (sizeof(struct btrfs_disk_key) + sizeof(u64)))
+ 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->blocksize))
+#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__));
-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 csum[BTRFS_CSUM_SIZE];
/* the first 3 fields must match struct btrfs_header */
- u8 fsid[16]; /* FS specific uuid */
- __le64 blocknr; /* this block number */
+ 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;
- __le32 blocksize;
__le64 generation;
__le64 root;
- __le64 total_blocks;
- __le64 blocks_used;
+ __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 last_device_id;
- /* fields below here vary with the underlying disk */
- __le64 device_block_start;
- __le64 device_num_blocks;
- __le64 device_root;
- __le64 device_id;
+ __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;
+
+ /* future expansion */
+ __le64 reserved[31];
+ 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)
+
+#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_MIXED_GROUPS)
+
+/*
* 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;
+ __le32 size;
} __attribute__ ((__packed__));
/*
struct btrfs_key_ptr {
struct btrfs_disk_key key;
__le64 blockptr;
+ __le64 generation;
} __attribute__ ((__packed__));
struct btrfs_node {
* 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];
+ 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 keep_locks:1;
+ unsigned int skip_locking:1;
+ unsigned int leave_spinning: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__));
-struct btrfs_inode_timespec {
+#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;
+ u64 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_timespec {
__le64 sec;
__le32 nsec;
} __attribute__ ((__packed__));
-/*
- * there is no padding here on purpose. If you want to extent the inode,
- * make a new item type
- */
+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;
+
struct btrfs_inode_item {
+ /* nfs style generation number */
__le64 generation;
+ /* transid that last touched this inode */
+ __le64 transid;
__le64 size;
- __le64 nblocks;
+ __le64 nbytes;
+ __le64 block_group;
__le32 nlink;
__le32 uid;
__le32 gid;
__le32 mode;
- __le32 rdev;
- __le16 flags;
- __le16 compat_flags;
- struct btrfs_inode_timespec atime;
- struct btrfs_inode_timespec ctime;
- struct btrfs_inode_timespec mtime;
- struct btrfs_inode_timespec otime;
+ __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__));
-/* inline data is just a blob of bytes */
-struct btrfs_inline_data_item {
- u8 data;
+struct btrfs_dir_log_item {
+ __le64 end;
} __attribute__ ((__packed__));
struct btrfs_dir_item {
struct btrfs_disk_key location;
- __le16 flags;
+ __le64 transid;
+ __le16 data_len;
__le16 name_len;
u8 type;
} __attribute__ ((__packed__));
struct btrfs_root_item {
struct btrfs_inode_item inode;
+ __le64 generation;
__le64 root_dirid;
- __le64 blocknr;
- __le32 flags;
- __le64 block_limit;
- __le64 blocks_used;
+ __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__));
+
+/*
+ * 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_blocknr;
- __le64 disk_num_blocks;
+ __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
/*
* the logical number of file blocks (no csums included)
*/
- __le64 num_blocks;
+ __le64 num_bytes;
+
} __attribute__ ((__packed__));
struct btrfs_csum_item {
- u8 csum[BTRFS_CSUM_SIZE];
+ u8 csum;
} __attribute__ ((__packed__));
-struct btrfs_device_item {
- __le16 pathlen;
- __le64 device_id;
+/* tag for the radix tree of block groups in ram */
+#define BTRFS_BLOCK_GROUP_DATA (1 << 0)
+#define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
+#define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
+#define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
+#define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
+#define BTRFS_BLOCK_GROUP_DUP (1 << 5)
+#define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
+
+struct btrfs_block_group_item {
+ __le64 used;
+ __le64 chunk_objectid;
+ __le64 flags;
} __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;
+ 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_key current_insert;
- struct btrfs_key last_insert;
- struct radix_tree_root cache_radix;
- struct radix_tree_root pinned_radix;
- struct radix_tree_root dev_radix;
- struct list_head trans;
- struct list_head cache;
- u64 last_inode_alloc;
- u64 last_inode_alloc_dirid;
+ struct btrfs_root *csum_root;
+
+ struct cache_tree fs_root_cache;
+
+ /* 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;
- int cache_size;
- int fp;
+ 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 *disk_super;
+ 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 btrfs_fs_devices *fs_devices;
+ struct list_head space_info;
+ int system_allocs;
+ int readonly;
};
/*
* 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.
+ * and for the extent tree extent_root root.
*/
struct btrfs_root {
- struct btrfs_buffer *node;
- struct btrfs_buffer *commit_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;
- u32 blocksize;
+ 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;
- u32 type;
-};
+ int track_dirty;
-/* the lower bits in the key flags defines the item type */
-#define BTRFS_KEY_TYPE_MAX 256
-#define BTRFS_KEY_TYPE_MASK (BTRFS_KEY_TYPE_MAX - 1)
-#define BTRFS_KEY_OVERFLOW_MAX 128
-#define BTRFS_KEY_OVERFLOW_SHIFT 8
-#define BTRFS_KEY_OVERFLOW_MASK (0x7FULL << BTRFS_KEY_OVERFLOW_SHIFT)
+ 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 cache_extent cache;
+};
/*
* 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_ITEM_KEY 1
+#define BTRFS_INODE_REF_KEY 12
+#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 2
-#define BTRFS_DIR_INDEX_KEY 3
+#define BTRFS_DIR_ITEM_KEY 84
+#define BTRFS_DIR_INDEX_KEY 96
+
/*
- * inline data is file data that fits in the btree.
+ * extent data is for file data
*/
-#define BTRFS_INLINE_DATA_KEY 4
+#define BTRFS_EXTENT_DATA_KEY 108
+
/*
- * extent data is for data that can't fit in the btree. It points to
- * a (hopefully) huge chunk of disk
+ * csum items have the checksums for data in the extents
*/
-#define BTRFS_EXTENT_DATA_KEY 5
+#define BTRFS_CSUM_ITEM_KEY 120
/*
- * csum items have the checksums for data in the extents
+ * extent csums are stored in a separate tree and hold csums for
+ * an entire extent on disk.
*/
-#define BTRFS_CSUM_ITEM_KEY 6
+#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 7
+#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 8
+#define BTRFS_EXTENT_ITEM_KEY 168
+
+#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
+
/*
- * dev items list the devices that make up the FS
+ * block groups give us hints into the extent allocation trees. Which
+ * blocks are free etc etc
*/
-#define BTRFS_DEV_ITEM_KEY 9
+#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
/*
* string items are for debugging. They just store a short string of
* data in the FS
*/
-#define BTRFS_STRING_ITEM_KEY 10
-
-static inline u64 btrfs_inode_generation(struct btrfs_inode_item *i)
+#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(struct extent_buffer *eb) \
+{ \
+ 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(struct extent_buffer *eb, \
+ type *s) \
+{ \
+ unsigned long offset = (unsigned long)s; \
+ type *p = (type *) (eb->data + offset); \
+ return le##bits##_to_cpu(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); \
+ p->member = cpu_to_le##bits(val); \
+}
+
+#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
+static inline u##bits btrfs_##name(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)
{
- return le64_to_cpu(i->generation);
+ btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
}
-static inline void btrfs_set_inode_generation(struct btrfs_inode_item *i,
- u64 val)
+static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
+ struct btrfs_chunk *c, int nr)
{
- i->generation = cpu_to_le64(val);
+ return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
}
-static inline u64 btrfs_inode_size(struct btrfs_inode_item *i)
+static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
+ struct btrfs_chunk *c, int nr,
+ u64 val)
{
- return le64_to_cpu(i->size);
-}
-
-static inline void btrfs_set_inode_size(struct btrfs_inode_item *i, 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_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)
{
- i->size = cpu_to_le64(val);
-}
+ unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
+ return (u8 *)((unsigned long)dev + ptr);
+}
-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);
-}
+/* struct btrfs_extent_item */
+BTRFS_SETGET_FUNCS(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);
-static inline u32 btrfs_inode_nlink(struct btrfs_inode_item *i)
-{
- return le32_to_cpu(i->nlink);
-}
+BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
-static inline void btrfs_set_inode_nlink(struct btrfs_inode_item *i, u32 val)
-{
- i->nlink = cpu_to_le32(val);
-}
+BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
-static inline u32 btrfs_inode_uid(struct btrfs_inode_item *i)
+static inline void btrfs_tree_block_key(struct extent_buffer *eb,
+ struct btrfs_tree_block_info *item,
+ struct btrfs_disk_key *key)
{
- return le32_to_cpu(i->uid);
+ read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
}
-static inline void btrfs_set_inode_uid(struct btrfs_inode_item *i, u32 val)
+static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
+ struct btrfs_tree_block_info *item,
+ struct btrfs_disk_key *key)
{
- i->uid = cpu_to_le32(val);
+ write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
}
-static inline u32 btrfs_inode_gid(struct btrfs_inode_item *i)
-{
- return le32_to_cpu(i->gid);
-}
+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);
-static inline void btrfs_set_inode_gid(struct btrfs_inode_item *i, u32 val)
-{
- i->gid = cpu_to_le32(val);
-}
+BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
+ count, 32);
-static inline u32 btrfs_inode_mode(struct btrfs_inode_item *i)
-{
- return le32_to_cpu(i->mode);
-}
+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);
-static inline void btrfs_set_inode_mode(struct btrfs_inode_item *i, u32 val)
+static inline u32 btrfs_extent_inline_ref_size(int type)
{
- i->mode = cpu_to_le32(val);
+ 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;
}
-static inline u32 btrfs_inode_rdev(struct btrfs_inode_item *i)
-{
- return le32_to_cpu(i->rdev);
-}
+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);
-static inline void btrfs_set_inode_rdev(struct btrfs_inode_item *i, u32 val)
-{
- i->rdev = cpu_to_le32(val);
-}
+/* 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 u16 btrfs_inode_flags(struct btrfs_inode_item *i)
+static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
{
- return le16_to_cpu(i->flags);
+ 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_inode_flags(struct btrfs_inode_item *i, u16 val)
+static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
+ int nr, u64 val)
{
- i->flags = cpu_to_le16(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 u16 btrfs_inode_compat_flags(struct btrfs_inode_item *i)
+static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
{
- return le16_to_cpu(i->compat_flags);
+ 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_inode_compat_flags(struct btrfs_inode_item *i,
- u16 val)
+static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
+ int nr, u64 val)
{
- i->compat_flags = cpu_to_le16(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 u64 btrfs_timespec_sec(struct btrfs_inode_timespec *ts)
+static inline unsigned long btrfs_node_key_ptr_offset(int nr)
{
- return le64_to_cpu(ts->sec);
+ return offsetof(struct btrfs_node, ptrs) +
+ sizeof(struct btrfs_key_ptr) * nr;
}
-static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec *ts,
- u64 val)
+static inline void btrfs_node_key(struct extent_buffer *eb,
+ struct btrfs_disk_key *disk_key, int nr)
{
- ts->sec = cpu_to_le64(val);
+ 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 u32 btrfs_timespec_nsec(struct btrfs_inode_timespec *ts)
+static inline void btrfs_set_node_key(struct extent_buffer *eb,
+ struct btrfs_disk_key *disk_key, int nr)
{
- return le32_to_cpu(ts->nsec);
+ 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);
}
-static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec *ts,
- u32 val)
-{
- ts->nsec = cpu_to_le32(val);
-}
+/* 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 u32 btrfs_extent_refs(struct btrfs_extent_item *ei)
+static inline unsigned long btrfs_item_nr_offset(int nr)
{
- return le32_to_cpu(ei->refs);
+ return offsetof(struct btrfs_leaf, items) +
+ sizeof(struct btrfs_item) * nr;
}
-static inline void btrfs_set_extent_refs(struct btrfs_extent_item *ei, u32 val)
+static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
+ int nr)
{
- ei->refs = cpu_to_le32(val);
+ return (struct btrfs_item *)btrfs_item_nr_offset(nr);
}
-static inline u64 btrfs_node_blockptr(struct btrfs_node *n, int nr)
+static inline u32 btrfs_item_end(struct extent_buffer *eb,
+ struct btrfs_item *item)
{
- return le64_to_cpu(n->ptrs[nr].blockptr);
+ return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
}
-static inline void btrfs_set_node_blockptr(struct btrfs_node *n, int nr,
- u64 val)
+static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
{
- n->ptrs[nr].blockptr = cpu_to_le64(val);
+ return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
}
-static inline u32 btrfs_item_offset(struct btrfs_item *item)
+static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
{
- return le32_to_cpu(item->offset);
+ return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
}
-static inline void btrfs_set_item_offset(struct btrfs_item *item, u32 val)
+static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
{
- item->offset = cpu_to_le32(val);
+ return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
}
-static inline u32 btrfs_item_end(struct btrfs_item *item)
+static inline void btrfs_item_key(struct extent_buffer *eb,
+ struct btrfs_disk_key *disk_key, int nr)
{
- return le32_to_cpu(item->offset) + le16_to_cpu(item->size);
+ struct btrfs_item *item = btrfs_item_nr(eb, nr);
+ read_eb_member(eb, item, struct btrfs_item, key, disk_key);
}
-static inline u16 btrfs_item_size(struct btrfs_item *item)
+static inline void btrfs_set_item_key(struct extent_buffer *eb,
+ struct btrfs_disk_key *disk_key, int nr)
{
- return le16_to_cpu(item->size);
+ struct btrfs_item *item = btrfs_item_nr(eb, nr);
+ write_eb_member(eb, item, struct btrfs_item, key, disk_key);
}
-static inline void btrfs_set_item_size(struct btrfs_item *item, u16 val)
-{
- item->size = cpu_to_le16(val);
-}
+BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
-static inline u16 btrfs_dir_flags(struct btrfs_dir_item *d)
-{
- return le16_to_cpu(d->flags);
-}
+/*
+ * 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);
-static inline void btrfs_set_dir_flags(struct btrfs_dir_item *d, u16 val)
-{
- d->flags = cpu_to_le16(val);
-}
+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);
-static inline u8 btrfs_dir_type(struct btrfs_dir_item *d)
-{
- return d->type;
-}
+/* 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);
-static inline void btrfs_set_dir_type(struct btrfs_dir_item *d, u8 val)
+static inline void btrfs_dir_item_key(struct extent_buffer *eb,
+ struct btrfs_dir_item *item,
+ struct btrfs_disk_key *key)
{
- d->type = val;
+ read_eb_member(eb, item, struct btrfs_dir_item, location, key);
}
-static inline u16 btrfs_dir_name_len(struct btrfs_dir_item *d)
+static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
+ struct btrfs_dir_item *item,
+ struct btrfs_disk_key *key)
{
- return le16_to_cpu(d->name_len);
+ write_eb_member(eb, item, struct btrfs_dir_item, location, key);
}
-static inline void btrfs_set_dir_name_len(struct btrfs_dir_item *d, u16 val)
-{
- d->name_len = cpu_to_le16(val);
-}
+/* 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->flags = le32_to_cpu(disk->flags);
+ cpu->type = disk->type;
cpu->objectid = le64_to_cpu(disk->objectid);
}
struct btrfs_key *cpu)
{
disk->offset = cpu_to_le64(cpu->offset);
- disk->flags = cpu_to_le32(cpu->flags);
+ disk->type = cpu->type;
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_overflow(struct btrfs_key *key)
-{
- u32 over = key->flags & BTRFS_KEY_OVERFLOW_MASK;
- return over >> BTRFS_KEY_OVERFLOW_SHIFT;
-}
-
-static inline void btrfs_set_key_overflow(struct btrfs_key *key, u32 over)
-{
- BUG_ON(over >= BTRFS_KEY_OVERFLOW_MAX);
- over = over << BTRFS_KEY_OVERFLOW_SHIFT;
- key->flags = (key->flags & ~((u64)BTRFS_KEY_OVERFLOW_MASK)) | over;
-}
-
-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 u32 btrfs_disk_key_overflow(struct btrfs_disk_key *key)
-{
- u32 over = le32_to_cpu(key->flags) & BTRFS_KEY_OVERFLOW_MASK;
- return over >> BTRFS_KEY_OVERFLOW_SHIFT;
-}
-
-static inline void btrfs_set_disK_key_overflow(struct btrfs_disk_key *key,
- u32 over)
-{
- u32 flags = btrfs_disk_key_flags(key);
- BUG_ON(over >= BTRFS_KEY_OVERFLOW_MAX);
- over = over << BTRFS_KEY_OVERFLOW_SHIFT;
- flags = (flags & ~((u64)BTRFS_KEY_OVERFLOW_MASK)) | over;
- 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_generation(struct btrfs_header *h)
-{
- return le64_to_cpu(h->generation);
-}
-
-static inline void btrfs_set_header_generation(struct btrfs_header *h,
- u64 val)
+static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
+ struct btrfs_key *key, int nr)
{
- h->generation = cpu_to_le64(val);
+ struct btrfs_disk_key disk_key;
+ btrfs_node_key(eb, &disk_key, nr);
+ btrfs_disk_key_to_cpu(key, &disk_key);
}
-static inline u16 btrfs_header_nritems(struct btrfs_header *h)
+static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
+ struct btrfs_key *key, int nr)
{
- return le16_to_cpu(h->nritems);
+ 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_set_header_nritems(struct btrfs_header *h, u16 val)
+static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
+ struct btrfs_dir_item *item,
+ struct btrfs_key *key)
{
- h->nritems = cpu_to_le16(val);
+ struct btrfs_disk_key disk_key;
+ btrfs_dir_item_key(eb, item, &disk_key);
+ btrfs_disk_key_to_cpu(key, &disk_key);
}
-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)
+static inline u8 btrfs_key_type(struct btrfs_key *key)
{
- h->flags = cpu_to_le16(val);
+ return key->type;
}
-static inline int btrfs_header_level(struct btrfs_header *h)
+static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
{
- return h->level;
+ key->type = val;
}
-static inline void btrfs_set_header_level(struct btrfs_header *h, int level)
-{
- BUG_ON(level > BTRFS_MAX_LEVEL);
- h->level = level;
-}
+/* 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);
-static inline int btrfs_is_leaf(struct btrfs_node *n)
+static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
{
- return (btrfs_header_level(&n->header) == 0);
+ return (btrfs_header_flags(eb) & flag) == flag;
}
-static inline u64 btrfs_root_blocknr(struct btrfs_root_item *item)
+static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
{
- return le64_to_cpu(item->blocknr);
+ u64 flags = btrfs_header_flags(eb);
+ btrfs_set_header_flags(eb, flags | flag);
+ return (flags & flag) == flag;
}
-static inline void btrfs_set_root_blocknr(struct btrfs_root_item *item, u64 val)
+static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
{
- item->blocknr = cpu_to_le64(val);
+ u64 flags = btrfs_header_flags(eb);
+ btrfs_set_header_flags(eb, flags & ~flag);
+ return (flags & flag) == flag;
}
-static inline u64 btrfs_root_dirid(struct btrfs_root_item *item)
+static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
{
- return le64_to_cpu(item->root_dirid);
+ u64 flags = btrfs_header_flags(eb);
+ return flags >> BTRFS_BACKREF_REV_SHIFT;
}
-static inline void btrfs_set_root_dirid(struct btrfs_root_item *item, u64 val)
+static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
+ int rev)
{
- item->root_dirid = cpu_to_le64(val);
+ 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 u32 btrfs_root_refs(struct btrfs_root_item *item)
+static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
{
- return le32_to_cpu(item->refs);
+ unsigned long ptr = offsetof(struct btrfs_header, fsid);
+ return (u8 *)ptr;
}
-static inline void btrfs_set_root_refs(struct btrfs_root_item *item, u32 val)
+static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
{
- item->refs = cpu_to_le32(val);
+ unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
+ return (u8 *)ptr;
}
-static inline u64 btrfs_super_blocknr(struct btrfs_super_block *s)
+static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
{
- return le64_to_cpu(s->blocknr);
+ unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
+ return (u8 *)ptr;
}
-static inline void btrfs_set_super_blocknr(struct btrfs_super_block *s, u64 val)
+static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
{
- s->blocknr = cpu_to_le64(val);
+ unsigned long ptr = offsetof(struct btrfs_header, csum);
+ return (u8 *)ptr;
}
-static inline u64 btrfs_super_generation(struct btrfs_super_block *s)
+static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
{
- return le64_to_cpu(s->generation);
+ return NULL;
}
-static inline void btrfs_set_super_generation(struct btrfs_super_block *s,
- u64 val)
+static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
{
- s->generation = cpu_to_le64(val);
+ return NULL;
}
-static inline u64 btrfs_super_root(struct btrfs_super_block *s)
+static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
{
- return le64_to_cpu(s->root);
+ return NULL;
}
-static inline void btrfs_set_super_root(struct btrfs_super_block *s, u64 val)
+static inline int btrfs_is_leaf(struct extent_buffer *eb)
{
- s->root = cpu_to_le64(val);
+ return (btrfs_header_level(eb) == 0);
}
-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);
-}
+/* 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);
-static inline void btrfs_set_super_blocks_used(struct btrfs_super_block *s,
- u64 val)
-{
- s->blocks_used = cpu_to_le64(val);
-}
+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);
-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);
-}
+/* 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);
-static inline u64 btrfs_super_root_dir(struct btrfs_super_block *s)
-{
- return le64_to_cpu(s->root_dir_objectid);
-}
+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);
-static inline void btrfs_set_super_root_dir(struct btrfs_super_block *s, u64
- val)
-{
- s->root_dir_objectid = cpu_to_le64(val);
-}
+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);
-static inline u64 btrfs_super_last_device_id(struct btrfs_super_block *s)
-{
- return le64_to_cpu(s->last_device_id);
-}
+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);
-static inline void btrfs_set_super_last_device_id(struct btrfs_super_block *s,
- u64 val)
-{
- s->last_device_id = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_super_device_id(struct btrfs_super_block *s)
-{
- return le64_to_cpu(s->device_id);
-}
-
-static inline void btrfs_set_super_device_id(struct btrfs_super_block *s,
- u64 val)
-{
- s->device_id = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_super_device_block_start(struct btrfs_super_block *s)
-{
- return le64_to_cpu(s->device_block_start);
-}
-
-static inline void btrfs_set_super_device_block_start(struct btrfs_super_block
- *s, u64 val)
-{
- s->device_block_start = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_super_device_num_blocks(struct btrfs_super_block *s)
-{
- return le64_to_cpu(s->device_num_blocks);
-}
-
-static inline void btrfs_set_super_device_num_blocks(struct btrfs_super_block
- *s, u64 val)
-{
- s->device_num_blocks = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_super_device_root(struct btrfs_super_block *s)
-{
- return le64_to_cpu(s->device_root);
-}
-
-static inline void btrfs_set_super_device_root(struct btrfs_super_block
- *s, u64 val)
-{
- s->device_root = cpu_to_le64(val);
-}
-
-static inline u8 *btrfs_leaf_data(struct btrfs_leaf *l)
-{
- return (u8 *)l->items;
-}
-
-static inline u64 btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item
- *e)
-{
- return le64_to_cpu(e->disk_blocknr);
-}
-
-static inline void btrfs_set_file_extent_disk_blocknr(struct
- btrfs_file_extent_item
- *e, u64 val)
-{
- e->disk_blocknr = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_file_extent_generation(struct btrfs_file_extent_item *e)
-{
- return le64_to_cpu(e->generation);
-}
-
-static inline void btrfs_set_file_extent_generation(struct
- btrfs_file_extent_item *e,
- u64 val)
-{
- e->generation = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_file_extent_disk_num_blocks(struct
- btrfs_file_extent_item *e)
-{
- return le64_to_cpu(e->disk_num_blocks);
-}
-
-static inline void btrfs_set_file_extent_disk_num_blocks(struct
- btrfs_file_extent_item
- *e, u64 val)
-{
- e->disk_num_blocks = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_file_extent_offset(struct btrfs_file_extent_item *e)
-{
- return le64_to_cpu(e->offset);
-}
-
-static inline void btrfs_set_file_extent_offset(struct btrfs_file_extent_item
- *e, u64 val)
-{
- e->offset = cpu_to_le64(val);
-}
-
-static inline u64 btrfs_file_extent_num_blocks(struct btrfs_file_extent_item
- *e)
-{
- return le64_to_cpu(e->num_blocks);
-}
-
-static inline void btrfs_set_file_extent_num_blocks(struct
- btrfs_file_extent_item *e,
- u64 val)
-{
- e->num_blocks = cpu_to_le64(val);
-}
-
-static inline u16 btrfs_device_pathlen(struct btrfs_device_item *d)
-{
- return le16_to_cpu(d->pathlen);
-}
-
-static inline void btrfs_set_device_pathlen(struct btrfs_device_item *d,
- u16 val)
+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_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);
+
+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);
+
+/* 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,
+ struct btrfs_file_extent_item *e)
{
- d->pathlen = cpu_to_le16(val);
+ return btrfs_file_extent_ram_bytes(eb, e);
}
-static inline u64 btrfs_device_id(struct btrfs_device_item *d)
+/*
+ * 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)
{
- return le64_to_cpu(d->device_id);
+ unsigned long offset;
+ offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
+ return btrfs_item_size(eb, e) - offset;
}
-static inline void btrfs_set_device_id(struct btrfs_device_item *d,
- u64 val)
-{
- d->device_id = cpu_to_le64(val);
+static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
+ if (level == 0)
+ return root->leafsize;
+ return root->nodesize;
}
/* 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);
+ 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_extent_post_op(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root);
+int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
+struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
+ btrfs_fs_info *info,
+ u64 bytenr);
+struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
+ struct btrfs_block_group_cache
+ *hint, u64 search_start,
+ int data, int owner);
+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 num_bytes, u64 *refs, u64 *flags);
+int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ u64 bytenr, u64 num_bytes, u64 flags);
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);
+ 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);
+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);
+/* ctree.c */
+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_comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2);
+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_realloc_node(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, struct extent_buffer *parent,
+ int start_slot, int cache_only, u64 *last_ret,
+ struct btrfs_key *progress);
void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
+struct btrfs_path *btrfs_alloc_path(void);
+void btrfs_free_path(struct btrfs_path *p);
void btrfs_init_path(struct btrfs_path *p);
-int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
- struct btrfs_path *path);
+int btrfs_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_item(struct btrfs_trans_handle *trans, struct btrfs_root
- *root, struct btrfs_path *path, struct btrfs_key
- *cpu_key, 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);
-int btrfs_leaf_free_space(struct btrfs_root *root, struct btrfs_leaf *leaf);
+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);
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);
+ *root);
+int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
+ 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_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
*item);
int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
btrfs_root_item *item, struct btrfs_key *key);
+int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
+ struct btrfs_root *latest_root);
+/* dir-item.c */
int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
- *root, char *name, int name_len, u64 dir,
- struct btrfs_key *location, u8 type);
-int btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
- *root, struct btrfs_path *path, u64 dir, 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);
+ *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_item(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct btrfs_path *path, u64 dir,
+ u64 objectid, const char *name, int name_len,
+ int mod);
+struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
+ struct btrfs_path *path,
+ const char *name, int name_len);
+int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct btrfs_path *path,
+ struct btrfs_dir_item *di);
+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);
+struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct btrfs_path *path, u64 dir,
+ const char *name, u16 name_len,
+ int mod);
+/* inode-map.c */
int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
struct btrfs_root *fs_root,
u64 dirid, u64 *objectid);
+int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
+
+/* inode-item.c */
+int btrfs_insert_inode_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_del_inode_ref(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ const char *name, int name_len,
+ u64 inode_objectid, u64 ref_objectid);
+int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct btrfs_path *path, u64 objectid);
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);
+ *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_lookup_file_extent(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct btrfs_path *path, u64 objectid,
+ u64 bytenr, int mod);
+int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, u64 alloc_end,
+ u64 bytenr, char *data, size_t len);
+struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct btrfs_path *path,
+ u64 bytenr, int cow);
+int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, struct btrfs_path *path,
+ u64 isize);
#endif
projects / platform / upstream / btrfs-progs.git / blobdiff