| /* |
| * 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_CTREE__ |
| #define __BTRFS_CTREE__ |
| |
| #include <linux/mm.h> |
| #include <linux/highmem.h> |
| #include <linux/fs.h> |
| #include <linux/rwsem.h> |
| #include <linux/semaphore.h> |
| #include <linux/completion.h> |
| #include <linux/backing-dev.h> |
| #include <linux/wait.h> |
| #include <linux/slab.h> |
| #include <linux/kobject.h> |
| #include <trace/events/btrfs.h> |
| #include <asm/kmap_types.h> |
| #include <linux/pagemap.h> |
| #include <linux/btrfs.h> |
| #include <linux/workqueue.h> |
| #include <linux/security.h> |
| #include "extent_io.h" |
| #include "extent_map.h" |
| #include "async-thread.h" |
| |
| struct btrfs_trans_handle; |
| struct btrfs_transaction; |
| struct btrfs_pending_snapshot; |
| extern struct kmem_cache *btrfs_trans_handle_cachep; |
| extern struct kmem_cache *btrfs_transaction_cachep; |
| extern struct kmem_cache *btrfs_bit_radix_cachep; |
| extern struct kmem_cache *btrfs_path_cachep; |
| extern struct kmem_cache *btrfs_free_space_cachep; |
| struct btrfs_ordered_sum; |
| |
| #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
| #define STATIC noinline |
| #else |
| #define STATIC static noinline |
| #endif |
| |
| #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 |
| |
| /* holds quota configuration and tracking */ |
| #define BTRFS_QUOTA_TREE_OBJECTID 8ULL |
| |
| /* for storing items that use the BTRFS_UUID_KEY* types */ |
| #define BTRFS_UUID_TREE_OBJECTID 9ULL |
| |
| /* for storing balance parameters in the root tree */ |
| #define BTRFS_BALANCE_OBJECTID -4ULL |
| |
| /* orhpan 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 |
| |
| /* for 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 storing |
| * 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 |
| |
| #define BTRFS_BTREE_INODE_OBJECTID 1 |
| |
| #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2 |
| |
| #define BTRFS_DEV_REPLACE_DEVID 0ULL |
| |
| /* |
| * 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 }; |
| |
| /* four bytes for CRC32 */ |
| #define BTRFS_EMPTY_DIR_SIZE 0 |
| |
| /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */ |
| #define REQ_GET_READ_MIRRORS (1 << 30) |
| |
| #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 |
| |
| /* ioprio of readahead is set to idle */ |
| #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) |
| |
| #define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024) |
| |
| #define BTRFS_MAX_EXTENT_SIZE (128 * 1024 * 1024) |
| |
| /* |
| * The key defines the order in the tree, and so it also defines (optimal) |
| * block layout. |
| * |
| * objectid corresponds to the inode number. |
| * |
| * type tells us things about the object, and is a kind of stream selector. |
| * so for a given inode, keys with type of 1 might refer to the inode data, |
| * type of 2 may point to file data in the btree and type == 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 extent_map_tree map_tree; |
| }; |
| |
| 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 allow 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) |
| |
| /* |
| * File system states |
| */ |
| #define BTRFS_FS_STATE_ERROR 0 |
| #define BTRFS_FS_STATE_REMOUNTING 1 |
| #define BTRFS_FS_STATE_TRANS_ABORTED 2 |
| #define BTRFS_FS_STATE_DEV_REPLACING 3 |
| |
| /* Super block flags */ |
| /* Errors detected */ |
| #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2) |
| |
| #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->nodesize)) |
| #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ |
| (offsetof(struct btrfs_file_extent_item, disk_bytenr)) |
| #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
| sizeof(struct btrfs_item) - \ |
| BTRFS_FILE_EXTENT_INLINE_DATA_START) |
| #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 unused_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 4 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 __unused_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_SAFE_SET 0ULL |
| #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL |
| #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL |
| #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL |
| #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL |
| |
| #define BTRFS_FEATURE_INCOMPAT_SUPP \ |
| (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ |
| BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ |
| BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ |
| BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ |
| BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ |
| BTRFS_FEATURE_INCOMPAT_RAID56 | \ |
| BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ |
| BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ |
| BTRFS_FEATURE_INCOMPAT_NO_HOLES) |
| |
| #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ |
| (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) |
| #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL |
| |
| /* |
| * 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 keep_locks:1; |
| unsigned int skip_locking:1; |
| unsigned int leave_spinning:1; |
| unsigned int search_commit_root:1; |
| unsigned int need_commit_sem:1; |
| unsigned int skip_release_on_error: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) |
| |
| /* |
| * this flag is only used internally by scrub and may be changed at any time |
| * it is only declared here to avoid collisions |
| */ |
| #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48) |
| |
| 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__)); |
| |
| /* old style backrefs item */ |
| 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__)); |
| |
| enum btrfs_compression_type { |
| BTRFS_COMPRESS_NONE = 0, |
| BTRFS_COMPRESS_ZLIB = 1, |
| BTRFS_COMPRESS_LZO = 2, |
| BTRFS_COMPRESS_TYPES = 2, |
| BTRFS_COMPRESS_LAST = 3, |
| }; |
| |
| 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__)); |
| |
| #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0) |
| |
| /* |
| * Internal in-memory flag that a subvolume has been marked for deletion but |
| * still visible as a directory |
| */ |
| #define BTRFS_ROOT_SUBVOL_DEAD (1ULL << 48) |
| |
| 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__)); |
| |
| struct btrfs_disk_balance_args { |
| /* |
| * profiles to operate on, single is denoted by |
| * BTRFS_AVAIL_ALLOC_BIT_SINGLE |
| */ |
| __le64 profiles; |
| |
| /* |
| * usage filter |
| * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N' |
| * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max |
| */ |
| union { |
| __le64 usage; |
| struct { |
| __le32 usage_min; |
| __le32 usage_max; |
| }; |
| }; |
| |
| /* devid filter */ |
| __le64 devid; |
| |
| /* devid subset filter [pstart..pend) */ |
| __le64 pstart; |
| __le64 pend; |
| |
| /* btrfs virtual address space subset filter [vstart..vend) */ |
| __le64 vstart; |
| __le64 vend; |
| |
| /* |
| * profile to convert to, single is denoted by |
| * BTRFS_AVAIL_ALLOC_BIT_SINGLE |
| */ |
| __le64 target; |
| |
| /* BTRFS_BALANCE_ARGS_* */ |
| __le64 flags; |
| |
| /* |
| * BTRFS_BALANCE_ARGS_LIMIT with value 'limit' |
| * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum |
| * and maximum |
| */ |
| union { |
| __le64 limit; |
| struct { |
| __le32 limit_min; |
| __le32 limit_max; |
| }; |
| }; |
| |
| /* |
| * Process chunks that cross stripes_min..stripes_max devices, |
| * BTRFS_BALANCE_ARGS_STRIPES_RANGE |
| */ |
| __le32 stripes_min; |
| __le32 stripes_max; |
| |
| __le64 unused[6]; |
| } __attribute__ ((__packed__)); |
| |
| /* |
| * store balance parameters to disk so that balance can be properly |
| * resumed after crash or unmount |
| */ |
| struct btrfs_balance_item { |
| /* BTRFS_BALANCE_* */ |
| __le64 flags; |
| |
| struct btrfs_disk_balance_args data; |
| struct btrfs_disk_balance_args meta; |
| struct btrfs_disk_balance_args sys; |
| |
| __le64 unused[4]; |
| } __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 |
| * |
| * At this offset in the structure, the inline extent data start. |
| */ |
| __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). This |
| * always reflects the size uncompressed and without encoding. |
| */ |
| __le64 num_bytes; |
| |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_csum_item { |
| u8 csum; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_dev_stats_item { |
| /* |
| * grow this item struct at the end for future enhancements and keep |
| * the existing values unchanged |
| */ |
| __le64 values[BTRFS_DEV_STAT_VALUES_MAX]; |
| } __attribute__ ((__packed__)); |
| |
| #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0 |
| #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1 |
| #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0 |
| #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1 |
| #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2 |
| #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3 |
| #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4 |
| |
| struct btrfs_dev_replace { |
| u64 replace_state; /* see #define above */ |
| u64 time_started; /* seconds since 1-Jan-1970 */ |
| u64 time_stopped; /* seconds since 1-Jan-1970 */ |
| atomic64_t num_write_errors; |
| atomic64_t num_uncorrectable_read_errors; |
| |
| u64 cursor_left; |
| u64 committed_cursor_left; |
| u64 cursor_left_last_write_of_item; |
| u64 cursor_right; |
| |
| u64 cont_reading_from_srcdev_mode; /* see #define above */ |
| |
| int is_valid; |
| int item_needs_writeback; |
| struct btrfs_device *srcdev; |
| struct btrfs_device *tgtdev; |
| |
| pid_t lock_owner; |
| atomic_t nesting_level; |
| struct mutex lock_finishing_cancel_unmount; |
| struct mutex lock_management_lock; |
| struct mutex lock; |
| |
| struct btrfs_scrub_progress scrub_progress; |
| }; |
| |
| struct btrfs_dev_replace_item { |
| /* |
| * grow this item struct at the end for future enhancements and keep |
| * the existing values unchanged |
| */ |
| __le64 src_devid; |
| __le64 cursor_left; |
| __le64 cursor_right; |
| __le64 cont_reading_from_srcdev_mode; |
| |
| __le64 replace_state; |
| __le64 time_started; |
| __le64 time_stopped; |
| __le64 num_write_errors; |
| __le64 num_uncorrectable_read_errors; |
| } __attribute__ ((__packed__)); |
| |
| /* different types of block groups (and chunks) */ |
| #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 | \ |
| BTRFS_SPACE_INFO_GLOBAL_RSV) |
| |
| enum btrfs_raid_types { |
| BTRFS_RAID_RAID10, |
| BTRFS_RAID_RAID1, |
| BTRFS_RAID_DUP, |
| BTRFS_RAID_RAID0, |
| BTRFS_RAID_SINGLE, |
| BTRFS_RAID_RAID5, |
| BTRFS_RAID_RAID6, |
| BTRFS_NR_RAID_TYPES |
| }; |
| |
| #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) |
| #define BTRFS_BLOCK_GROUP_RAID56_MASK (BTRFS_BLOCK_GROUP_RAID5 | \ |
| BTRFS_BLOCK_GROUP_RAID6) |
| |
| /* |
| * We need a bit for restriper to be able to tell when chunks of type |
| * SINGLE are available. This "extended" profile format is used in |
| * fs_info->avail_*_alloc_bits (in-memory) and balance item fields |
| * (on-disk). The corresponding on-disk bit in chunk.type is reserved |
| * to avoid remappings between two formats in future. |
| */ |
| #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48) |
| |
| /* |
| * A fake block group type that is used to communicate global block reserve |
| * size to userspace via the SPACE_INFO ioctl. |
| */ |
| #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49) |
| |
| #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \ |
| BTRFS_AVAIL_ALLOC_BIT_SINGLE) |
| |
| static inline u64 chunk_to_extended(u64 flags) |
| { |
| if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0) |
| flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE; |
| |
| return flags; |
| } |
| static inline u64 extended_to_chunk(u64 flags) |
| { |
| return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE; |
| } |
| |
| struct btrfs_block_group_item { |
| __le64 used; |
| __le64 chunk_objectid; |
| __le64 flags; |
| } __attribute__ ((__packed__)); |
| |
| #define BTRFS_QGROUP_LEVEL_SHIFT 48 |
| static inline u64 btrfs_qgroup_level(u64 qgroupid) |
| { |
| return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT; |
| } |
| |
| /* |
| * is subvolume quota turned on? |
| */ |
| #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0) |
| /* |
| * RESCAN is set during the initialization phase |
| */ |
| #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1) |
| /* |
| * Some qgroup entries are known to be out of date, |
| * either because the configuration has changed in a way that |
| * makes a rescan necessary, or because the fs has been mounted |
| * with a non-qgroup-aware version. |
| * Turning qouta off and on again makes it inconsistent, too. |
| */ |
| #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2) |
| |
| #define BTRFS_QGROUP_STATUS_VERSION 1 |
| |
| struct btrfs_qgroup_status_item { |
| __le64 version; |
| /* |
| * the generation is updated during every commit. As older |
| * versions of btrfs are not aware of qgroups, it will be |
| * possible to detect inconsistencies by checking the |
| * generation on mount time |
| */ |
| __le64 generation; |
| |
| /* flag definitions see above */ |
| __le64 flags; |
| |
| /* |
| * only used during scanning to record the progress |
| * of the scan. It contains a logical address |
| */ |
| __le64 rescan; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_qgroup_info_item { |
| __le64 generation; |
| __le64 rfer; |
| __le64 rfer_cmpr; |
| __le64 excl; |
| __le64 excl_cmpr; |
| } __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 { |
| /* |
| * only updated when any of the other values change |
| */ |
| __le64 flags; |
| __le64 max_rfer; |
| __le64 max_excl; |
| __le64 rsv_rfer; |
| __le64 rsv_excl; |
| } __attribute__ ((__packed__)); |
| |
| /* For raid type sysfs entries */ |
| struct raid_kobject { |
| int raid_type; |
| struct kobject kobj; |
| }; |
| |
| struct btrfs_space_info { |
| spinlock_t lock; |
| |
| u64 total_bytes; /* total bytes in the space, |
| this doesn't take mirrors into account */ |
| u64 bytes_used; /* total bytes used, |
| this doesn't take mirrors into account */ |
| u64 bytes_pinned; /* total bytes pinned, will be freed when the |
| transaction finishes */ |
| u64 bytes_reserved; /* total bytes the allocator has reserved for |
| current allocations */ |
| u64 bytes_may_use; /* number of bytes that may be used for |
| delalloc/allocations */ |
| u64 bytes_readonly; /* total bytes that are read only */ |
| |
| u64 max_extent_size; /* This will hold the maximum extent size of |
| the space info if we had an ENOSPC in the |
| allocator. */ |
| |
| unsigned int full:1; /* indicates that we cannot allocate any more |
| chunks for this space */ |
| unsigned int chunk_alloc:1; /* set if we are allocating a chunk */ |
| |
| unsigned int flush:1; /* set if we are trying to make space */ |
| |
| unsigned int force_alloc; /* set if we need to force a chunk |
| alloc for this space */ |
| |
| u64 disk_used; /* total bytes used on disk */ |
| u64 disk_total; /* total bytes on disk, takes mirrors into |
| account */ |
| |
| u64 flags; |
| |
| /* |
| * bytes_pinned is kept in line with what is actually pinned, as in |
| * we've called update_block_group and dropped the bytes_used counter |
| * and increased the bytes_pinned counter. However this means that |
| * bytes_pinned does not reflect the bytes that will be pinned once the |
| * delayed refs are flushed, so this counter is inc'ed everytime we call |
| * btrfs_free_extent so it is a realtime count of what will be freed |
| * once the transaction is committed. It will be zero'ed everytime the |
| * transaction commits. |
| */ |
| struct percpu_counter total_bytes_pinned; |
| |
| struct list_head list; |
| /* Protected by the spinlock 'lock'. */ |
| struct list_head ro_bgs; |
| |
| struct rw_semaphore groups_sem; |
| /* for block groups in our same type */ |
| struct list_head block_groups[BTRFS_NR_RAID_TYPES]; |
| wait_queue_head_t wait; |
| |
| struct kobject kobj; |
| struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES]; |
| }; |
| |
| #define BTRFS_BLOCK_RSV_GLOBAL 1 |
| #define BTRFS_BLOCK_RSV_DELALLOC 2 |
| #define BTRFS_BLOCK_RSV_TRANS 3 |
| #define BTRFS_BLOCK_RSV_CHUNK 4 |
| #define BTRFS_BLOCK_RSV_DELOPS 5 |
| #define BTRFS_BLOCK_RSV_EMPTY 6 |
| #define BTRFS_BLOCK_RSV_TEMP 7 |
| |
| struct btrfs_block_rsv { |
| u64 size; |
| u64 reserved; |
| struct btrfs_space_info *space_info; |
| spinlock_t lock; |
| unsigned short full; |
| unsigned short type; |
| unsigned short failfast; |
| }; |
| |
| /* |
| * free clusters are used to claim free space in relatively large chunks, |
| * allowing us to do less seeky writes. They are used for all metadata |
| * allocations and data allocations in ssd mode. |
| */ |
| struct btrfs_free_cluster { |
| spinlock_t lock; |
| spinlock_t refill_lock; |
| struct rb_root root; |
| |
| /* largest extent in this cluster */ |
| u64 max_size; |
| |
| /* first extent starting offset */ |
| u64 window_start; |
| |
| /* We did a full search and couldn't create a cluster */ |
| bool fragmented; |
| |
| struct btrfs_block_group_cache *block_group; |
| /* |
| * when a cluster is allocated from a block group, we put the |
| * cluster onto a list in the block group so that it can |
| * be freed before the block group is freed. |
| */ |
| struct list_head block_group_list; |
| }; |
| |
| enum btrfs_caching_type { |
| BTRFS_CACHE_NO = 0, |
| BTRFS_CACHE_STARTED = 1, |
| BTRFS_CACHE_FAST = 2, |
| BTRFS_CACHE_FINISHED = 3, |
| BTRFS_CACHE_ERROR = 4, |
| }; |
| |
| enum btrfs_disk_cache_state { |
| BTRFS_DC_WRITTEN = 0, |
| BTRFS_DC_ERROR = 1, |
| BTRFS_DC_CLEAR = 2, |
| BTRFS_DC_SETUP = 3, |
| }; |
| |
| struct btrfs_caching_control { |
| struct list_head list; |
| struct mutex mutex; |
| wait_queue_head_t wait; |
| struct btrfs_work work; |
| struct btrfs_block_group_cache *block_group; |
| u64 progress; |
| atomic_t count; |
| }; |
| |
| struct btrfs_io_ctl { |
| void *cur, *orig; |
| struct page *page; |
| struct page **pages; |
| struct btrfs_root *root; |
| struct inode *inode; |
| unsigned long size; |
| int index; |
| int num_pages; |
| int entries; |
| int bitmaps; |
| unsigned check_crcs:1; |
| }; |
| |
| struct btrfs_block_group_cache { |
| struct btrfs_key key; |
| struct btrfs_block_group_item item; |
| struct btrfs_fs_info *fs_info; |
| struct inode *inode; |
| spinlock_t lock; |
| u64 pinned; |
| u64 reserved; |
| u64 delalloc_bytes; |
| u64 bytes_super; |
| u64 flags; |
| u64 sectorsize; |
| u64 cache_generation; |
| |
| /* |
| * It is just used for the delayed data space allocation because |
| * only the data space allocation and the relative metadata update |
| * can be done cross the transaction. |
| */ |
| struct rw_semaphore data_rwsem; |
| |
| /* for raid56, this is a full stripe, without parity */ |
| unsigned long full_stripe_len; |
| |
| unsigned int ro; |
| unsigned int iref:1; |
| unsigned int has_caching_ctl:1; |
| unsigned int removed:1; |
| |
| int disk_cache_state; |
| |
| /* cache tracking stuff */ |
| int cached; |
| struct btrfs_caching_control *caching_ctl; |
| u64 last_byte_to_unpin; |
| |
| struct btrfs_space_info *space_info; |
| |
| /* free space cache stuff */ |
| struct btrfs_free_space_ctl *free_space_ctl; |
| |
| /* block group cache stuff */ |
| struct rb_node cache_node; |
| |
| /* for block groups in the same raid type */ |
| struct list_head list; |
| |
| /* usage count */ |
| atomic_t count; |
| |
| /* List of struct btrfs_free_clusters for this block group. |
| * Today it will only have one thing on it, but that may change |
| */ |
| struct list_head cluster_list; |
| |
| /* For delayed block group creation or deletion of empty block groups */ |
| struct list_head bg_list; |
| |
| /* For read-only block groups */ |
| struct list_head ro_list; |
| |
| atomic_t trimming; |
| |
| /* For dirty block groups */ |
| struct list_head dirty_list; |
| struct list_head io_list; |
| |
| struct btrfs_io_ctl io_ctl; |
| }; |
| |
| /* delayed seq elem */ |
| struct seq_list { |
| struct list_head list; |
| u64 seq; |
| }; |
| |
| #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } |
| |
| enum btrfs_orphan_cleanup_state { |
| ORPHAN_CLEANUP_STARTED = 1, |
| ORPHAN_CLEANUP_DONE = 2, |
| }; |
| |
| /* used by the raid56 code to lock stripes for read/modify/write */ |
| struct btrfs_stripe_hash { |
| struct list_head hash_list; |
| wait_queue_head_t wait; |
| spinlock_t lock; |
| }; |
| |
| /* used by the raid56 code to lock stripes for read/modify/write */ |
| struct btrfs_stripe_hash_table { |
| struct list_head stripe_cache; |
| spinlock_t cache_lock; |
| int cache_size; |
| struct btrfs_stripe_hash table[]; |
| }; |
| |
| #define BTRFS_STRIPE_HASH_TABLE_BITS 11 |
| |
| void btrfs_init_async_reclaim_work(struct work_struct *work); |
| |
| /* fs_info */ |
| struct reloc_control; |
| struct btrfs_device; |
| struct btrfs_fs_devices; |
| struct btrfs_balance_control; |
| struct btrfs_delayed_root; |
| struct btrfs_fs_info { |
| u8 fsid[BTRFS_FSID_SIZE]; |
| u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
| struct btrfs_root *extent_root; |
| struct btrfs_root *tree_root; |
| struct btrfs_root *chunk_root; |
| struct btrfs_root *dev_root; |
| struct btrfs_root *fs_root; |
| struct btrfs_root *csum_root; |
| struct btrfs_root *quota_root; |
| struct btrfs_root *uuid_root; |
| |
| /* the log root tree is a directory of all the other log roots */ |
| struct btrfs_root *log_root_tree; |
| |
| spinlock_t fs_roots_radix_lock; |
| struct radix_tree_root fs_roots_radix; |
| |
| /* block group cache stuff */ |
| spinlock_t block_group_cache_lock; |
| u64 first_logical_byte; |
| struct rb_root block_group_cache_tree; |
| |
| /* keep track of unallocated space */ |
| spinlock_t free_chunk_lock; |
| u64 free_chunk_space; |
| |
| struct extent_io_tree freed_extents[2]; |
| struct extent_io_tree *pinned_extents; |
| |
| /* logical->physical extent mapping */ |
| struct btrfs_mapping_tree mapping_tree; |
| |
| /* |
| * block reservation for extent, checksum, root tree and |
| * delayed dir index item |
| */ |
| struct btrfs_block_rsv global_block_rsv; |
| /* block reservation for delay allocation */ |
| struct btrfs_block_rsv delalloc_block_rsv; |
| /* block reservation for metadata operations */ |
| struct btrfs_block_rsv trans_block_rsv; |
| /* block reservation for chunk tree */ |
| struct btrfs_block_rsv chunk_block_rsv; |
| /* block reservation for delayed operations */ |
| struct btrfs_block_rsv delayed_block_rsv; |
| |
| struct btrfs_block_rsv empty_block_rsv; |
| |
| u64 generation; |
| u64 last_trans_committed; |
| u64 avg_delayed_ref_runtime; |
| |
| /* |
| * this is updated to the current trans every time a full commit |
| * is required instead of the faster short fsync log commits |
| */ |
| u64 last_trans_log_full_commit; |
| unsigned long mount_opt; |
| /* |
| * Track requests for actions that need to be done during transaction |
| * commit (like for some mount options). |
| */ |
| unsigned long pending_changes; |
| unsigned long compress_type:4; |
| int commit_interval; |
| /* |
| * It is a suggestive number, the read side is safe even it gets a |
| * wrong number because we will write out the data into a regular |
| * extent. The write side(mount/remount) is under ->s_umount lock, |
| * so it is also safe. |
| */ |
| u64 max_inline; |
| /* |
| * Protected by ->chunk_mutex and sb->s_umount. |
| * |
| * The reason that we use two lock to protect it is because only |
| * remount and mount operations can change it and these two operations |
| * are under sb->s_umount, but the read side (chunk allocation) can not |
| * acquire sb->s_umount or the deadlock would happen. So we use two |
| * locks to protect it. On the write side, we must acquire two locks, |
| * and on the read side, we just need acquire one of them. |
| */ |
| u64 alloc_start; |
| struct btrfs_transaction *running_transaction; |
| wait_queue_head_t transaction_throttle; |
| wait_queue_head_t transaction_wait; |
| wait_queue_head_t transaction_blocked_wait; |
| wait_queue_head_t async_submit_wait; |
| |
| /* |
| * Used to protect the incompat_flags, compat_flags, compat_ro_flags |
| * when they are updated. |
| * |
| * Because we do not clear the flags for ever, so we needn't use |
| * the lock on the read side. |
| * |
| * We also needn't use the lock when we mount the fs, because |
| * there is no other task which will update the flag. |
| */ |
| spinlock_t super_lock; |
| struct btrfs_super_block *super_copy; |
| struct btrfs_super_block *super_for_commit; |
| struct block_device *__bdev; |
| struct super_block *sb; |
| struct inode *btree_inode; |
| struct backing_dev_info bdi; |
| struct mutex tree_log_mutex; |
| struct mutex transaction_kthread_mutex; |
| struct mutex cleaner_mutex; |
| struct mutex chunk_mutex; |
| struct mutex volume_mutex; |
| |
| /* |
| * this is taken to make sure we don't set block groups ro after |
| * the free space cache has been allocated on them |
| */ |
| struct mutex ro_block_group_mutex; |
| |
| /* this is used during read/modify/write to make sure |
| * no two ios are trying to mod the same stripe at the same |
| * time |
| */ |
| struct btrfs_stripe_hash_table *stripe_hash_table; |
| |
| /* |
| * this protects the ordered operations list only while we are |
| * processing all of the entries on it. This way we make |
| * sure the commit code doesn't find the list temporarily empty |
| * because another function happens to be doing non-waiting preflush |
| * before jumping into the main commit. |
| */ |
| struct mutex ordered_operations_mutex; |
| |
| struct rw_semaphore commit_root_sem; |
| |
| struct rw_semaphore cleanup_work_sem; |
| |
| struct rw_semaphore subvol_sem; |
| struct srcu_struct subvol_srcu; |
| |
| spinlock_t trans_lock; |
| /* |
| * the reloc mutex goes with the trans lock, it is taken |
| * during commit to protect us from the relocation code |
| */ |
| struct mutex reloc_mutex; |
| |
| struct list_head trans_list; |
| struct list_head dead_roots; |
| struct list_head caching_block_groups; |
| |
| spinlock_t delayed_iput_lock; |
| struct list_head delayed_iputs; |
| struct rw_semaphore delayed_iput_sem; |
| |
| /* this protects tree_mod_seq_list */ |
| spinlock_t tree_mod_seq_lock; |
| atomic64_t tree_mod_seq; |
| struct list_head tree_mod_seq_list; |
| |
| /* this protects tree_mod_log */ |
| rwlock_t tree_mod_log_lock; |
| struct rb_root tree_mod_log; |
| |
| atomic_t nr_async_submits; |
| atomic_t async_submit_draining; |
| atomic_t nr_async_bios; |
| atomic_t async_delalloc_pages; |
| atomic_t open_ioctl_trans; |
| |
| /* |
| * this is used to protect the following list -- ordered_roots. |
| */ |
| spinlock_t ordered_root_lock; |
| |
| /* |
| * all fs/file tree roots in which there are data=ordered extents |
| * pending writeback are added into this list. |
| * |
| * these can span multiple transactions and basically include |
| * every dirty data page that isn't from nodatacow |
| */ |
| struct list_head ordered_roots; |
| |
| struct mutex delalloc_root_mutex; |
| spinlock_t delalloc_root_lock; |
| /* all fs/file tree roots that have delalloc inodes. */ |
| struct list_head delalloc_roots; |
| |
| /* |
| * there is a pool of worker threads for checksumming during writes |
| * and a pool for checksumming after reads. This is because readers |
| * can run with FS locks held, and the writers may be waiting for |
| * those locks. We don't want ordering in the pending list to cause |
| * deadlocks, and so the two are serviced separately. |
| * |
| * A third pool does submit_bio to avoid deadlocking with the other |
| * two |
| */ |
| struct btrfs_workqueue *workers; |
| struct btrfs_workqueue *delalloc_workers; |
| struct btrfs_workqueue *flush_workers; |
| struct btrfs_workqueue *endio_workers; |
| struct btrfs_workqueue *endio_meta_workers; |
| struct btrfs_workqueue *endio_raid56_workers; |
| struct btrfs_workqueue *endio_repair_workers; |
| struct btrfs_workqueue *rmw_workers; |
| struct btrfs_workqueue *endio_meta_write_workers; |
| struct btrfs_workqueue *endio_write_workers; |
| struct btrfs_workqueue *endio_freespace_worker; |
| struct btrfs_workqueue *submit_workers; |
| struct btrfs_workqueue *caching_workers; |
| struct btrfs_workqueue *readahead_workers; |
| |
| /* |
| * fixup workers take dirty pages that didn't properly go through |
| * the cow mechanism and make them safe to write. It happens |
| * for the sys_munmap function call path |
| */ |
| struct btrfs_workqueue *fixup_workers; |
| struct btrfs_workqueue *delayed_workers; |
| |
| /* the extent workers do delayed refs on the extent allocation tree */ |
| struct btrfs_workqueue *extent_workers; |
| struct task_struct *transaction_kthread; |
| struct task_struct *cleaner_kthread; |
| int thread_pool_size; |
| |
| struct kobject *space_info_kobj; |
| int do_barriers; |
| int closing; |
| int log_root_recovering; |
| int open; |
| |
| u64 total_pinned; |
| |
| /* used to keep from writing metadata until there is a nice batch */ |
| struct percpu_counter dirty_metadata_bytes; |
| struct percpu_counter delalloc_bytes; |
| s32 dirty_metadata_batch; |
| s32 delalloc_batch; |
| |
| struct list_head dirty_cowonly_roots; |
| |
| struct btrfs_fs_devices *fs_devices; |
| |
| /* |
| * the space_info list is almost entirely read only. It only changes |
| * when we add a new raid type to the FS, and that happens |
| * very rarely. RCU is used to protect it. |
| */ |
| struct list_head space_info; |
| |
| struct btrfs_space_info *data_sinfo; |
| |
| struct reloc_control *reloc_ctl; |
| |
| /* data_alloc_cluster is only used in ssd mode */ |
| struct btrfs_free_cluster data_alloc_cluster; |
| |
| /* all metadata allocations go through this cluster */ |
| struct btrfs_free_cluster meta_alloc_cluster; |
| |
| /* auto defrag inodes go here */ |
| spinlock_t defrag_inodes_lock; |
| struct rb_root defrag_inodes; |
| atomic_t defrag_running; |
| |
| /* Used to protect avail_{data, metadata, system}_alloc_bits */ |
| seqlock_t profiles_lock; |
| /* |
| * these three are in extended format (availability of single |
| * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other |
| * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) |
| */ |
| u64 avail_data_alloc_bits; |
| u64 avail_metadata_alloc_bits; |
| u64 avail_system_alloc_bits; |
| |
| /* restriper state */ |
| spinlock_t balance_lock; |
| struct mutex balance_mutex; |
| atomic_t balance_running; |
| atomic_t balance_pause_req; |
| atomic_t balance_cancel_req; |
| struct btrfs_balance_control *balance_ctl; |
| wait_queue_head_t balance_wait_q; |
| |
| unsigned data_chunk_allocations; |
| unsigned metadata_ratio; |
| |
| void *bdev_holder; |
| |
| /* private scrub information */ |
| struct mutex scrub_lock; |
| atomic_t scrubs_running; |
| atomic_t scrub_pause_req; |
| atomic_t scrubs_paused; |
| atomic_t scrub_cancel_req; |
| wait_queue_head_t scrub_pause_wait; |
| int scrub_workers_refcnt; |
| struct btrfs_workqueue *scrub_workers; |
| struct btrfs_workqueue *scrub_wr_completion_workers; |
| struct btrfs_workqueue *scrub_nocow_workers; |
| struct btrfs_workqueue *scrub_parity_workers; |
| |
| #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
| u32 check_integrity_print_mask; |
| #endif |
| /* |
| * quota information |
| */ |
| unsigned int quota_enabled:1; |
| |
| /* |
| * quota_enabled only changes state after a commit. This holds the |
| * next state. |
| */ |
| unsigned int pending_quota_state:1; |
| |
| /* is qgroup tracking in a consistent state? */ |
| u64 qgroup_flags; |
| |
| /* holds configuration and tracking. Protected by qgroup_lock */ |
| struct rb_root qgroup_tree; |
| struct rb_root qgroup_op_tree; |
| spinlock_t qgroup_lock; |
| spinlock_t qgroup_op_lock; |
| atomic_t qgroup_op_seq; |
| |
| /* |
| * used to avoid frequently calling ulist_alloc()/ulist_free() |
| * when doing qgroup accounting, it must be protected by qgroup_lock. |
| */ |
| struct ulist *qgroup_ulist; |
| |
| /* protect user change for quota operations */ |
| struct mutex qgroup_ioctl_lock; |
| |
| /* list of dirty qgroups to be written at next commit */ |
| struct list_head dirty_qgroups; |
| |
| /* used by qgroup for an efficient tree traversal */ |
| u64 qgroup_seq; |
| |
| /* qgroup rescan items */ |
| struct mutex qgroup_rescan_lock; /* protects the progress item */ |
| struct btrfs_key qgroup_rescan_progress; |
| struct btrfs_workqueue *qgroup_rescan_workers; |
| struct completion qgroup_rescan_completion; |
| struct btrfs_work qgroup_rescan_work; |
| |
| /* filesystem state */ |
| unsigned long fs_state; |
| |
| struct btrfs_delayed_root *delayed_root; |
| |
| /* readahead tree */ |
| spinlock_t reada_lock; |
| struct radix_tree_root reada_tree; |
| |
| /* Extent buffer radix tree */ |
| spinlock_t buffer_lock; |
| struct radix_tree_root buffer_radix; |
| |
| /* next backup root to be overwritten */ |
| int backup_root_index; |
| |
| int num_tolerated_disk_barrier_failures; |
| |
| /* device replace state */ |
| struct btrfs_dev_replace dev_replace; |
| |
| atomic_t mutually_exclusive_operation_running; |
| |
| struct percpu_counter bio_counter; |
| wait_queue_head_t replace_wait; |
| |
| struct semaphore uuid_tree_rescan_sem; |
| unsigned int update_uuid_tree_gen:1; |
| |
| /* Used to reclaim the metadata space in the background. */ |
| struct work_struct async_reclaim_work; |
| |
| spinlock_t unused_bgs_lock; |
| struct list_head unused_bgs; |
| struct mutex unused_bg_unpin_mutex; |
| struct mutex delete_unused_bgs_mutex; |
| |
| /* For btrfs to record security options */ |
| struct security_mnt_opts security_opts; |
| |
| /* |
| * Chunks that can't be freed yet (under a trim/discard operation) |
| * and will be latter freed. Protected by fs_info->chunk_mutex. |
| */ |
| struct list_head pinned_chunks; |
| }; |
| |
| struct btrfs_subvolume_writers { |
| struct percpu_counter counter; |
| wait_queue_head_t wait; |
| }; |
| |
| /* |
| * The state of btrfs root |
| */ |
| /* |
| * btrfs_record_root_in_trans is a multi-step process, |
| * and it can race with the balancing code. But the |
| * race is very small, and only the first time the root |
| * is added to each transaction. So IN_TRANS_SETUP |
| * is used to tell us when more checks are required |
| */ |
| #define BTRFS_ROOT_IN_TRANS_SETUP 0 |
| #define BTRFS_ROOT_REF_COWS 1 |
| #define BTRFS_ROOT_TRACK_DIRTY 2 |
| #define BTRFS_ROOT_IN_RADIX 3 |
| #define BTRFS_ROOT_DUMMY_ROOT 4 |
| #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 5 |
| #define BTRFS_ROOT_DEFRAG_RUNNING 6 |
| #define BTRFS_ROOT_FORCE_COW 7 |
| #define BTRFS_ROOT_MULTI_LOG_TASKS 8 |
| #define BTRFS_ROOT_DIRTY 9 |
| |
| /* |
| * 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 *log_root; |
| struct btrfs_root *reloc_root; |
| |
| unsigned long state; |
| struct btrfs_root_item root_item; |
| struct btrfs_key root_key; |
| struct btrfs_fs_info *fs_info; |
| struct extent_io_tree dirty_log_pages; |
| |
| struct mutex objectid_mutex; |
| |
| spinlock_t accounting_lock; |
| struct btrfs_block_rsv *block_rsv; |
| |
| /* free ino cache stuff */ |
| struct btrfs_free_space_ctl *free_ino_ctl; |
| enum btrfs_caching_type ino_cache_state; |
| spinlock_t ino_cache_lock; |
| wait_queue_head_t ino_cache_wait; |
| struct btrfs_free_space_ctl *free_ino_pinned; |
| u64 ino_cache_progress; |
| struct inode *ino_cache_inode; |
| |
| struct mutex log_mutex; |
| wait_queue_head_t log_writer_wait; |
| wait_queue_head_t log_commit_wait[2]; |
| struct list_head log_ctxs[2]; |
| atomic_t log_writers; |
| atomic_t log_commit[2]; |
| atomic_t log_batch; |
| int log_transid; |
| /* No matter the commit succeeds or not*/ |
| int log_transid_committed; |
| /* Just be updated when the commit succeeds. */ |
| int last_log_commit; |
| pid_t log_start_pid; |
| |
| u64 objectid; |
| u64 last_trans; |
| |
| /* data allocations are done in sectorsize units */ |
| u32 sectorsize; |
| |
| /* node allocations are done in nodesize units */ |
| u32 nodesize; |
| |
| u32 stripesize; |
| |
| u32 type; |
| |
| u64 highest_objectid; |
| |
| /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */ |
| u64 alloc_bytenr; |
| |
| u64 defrag_trans_start; |
| struct btrfs_key defrag_progress; |
| struct btrfs_key defrag_max; |
| char *name; |
| |
| /* the dirty list is only used by non-reference counted roots */ |
| struct list_head dirty_list; |
| |
| struct list_head root_list; |
| |
| spinlock_t log_extents_lock[2]; |
| struct list_head logged_list[2]; |
| |
| spinlock_t orphan_lock; |
| atomic_t orphan_inodes; |
| struct btrfs_block_rsv *orphan_block_rsv; |
| int orphan_cleanup_state; |
| |
| spinlock_t inode_lock; |
| /* red-black tree that keeps track of in-memory inodes */ |
| struct rb_root inode_tree; |
| |
| /* |
| * radix tree that keeps track of delayed nodes of every inode, |
| * protected by inode_lock |
| */ |
| struct radix_tree_root delayed_nodes_tree; |
| /* |
| * right now this just gets used so that a root has its own devid |
| * for stat. It may be used for more later |
| */ |
| dev_t anon_dev; |
| |
| spinlock_t root_item_lock; |
| atomic_t refs; |
| |
| struct mutex delalloc_mutex; |
| spinlock_t delalloc_lock; |
| /* |
| * all of the inodes that have delalloc bytes. It is possible for |
| * this list to be empty even when there is still dirty data=ordered |
| * extents waiting to finish IO. |
| */ |
| struct list_head delalloc_inodes; |
| struct list_head delalloc_root; |
| u64 nr_delalloc_inodes; |
| |
| struct mutex ordered_extent_mutex; |
| /* |
| * this is used by the balancing code to wait for all the pending |
| * ordered extents |
| */ |
| spinlock_t ordered_extent_lock; |
| |
| /* |
| * all of the data=ordered extents pending writeback |
| * these can span multiple transactions and basically include |
| * every dirty data page that isn't from nodatacow |
| */ |
| struct list_head ordered_extents; |
| struct list_head ordered_root; |
| u64 nr_ordered_extents; |
| |
| /* |
| * Number of currently running SEND ioctls to prevent |
| * manipulation with the read-only status via SUBVOL_SETFLAGS |
| */ |
| int send_in_progress; |
| struct btrfs_subvolume_writers *subv_writers; |
| atomic_t will_be_snapshoted; |
| |
| /* For qgroup metadata space reserve */ |
| atomic_t qgroup_meta_rsv; |
| }; |
| |
| struct btrfs_ioctl_defrag_range_args { |
| /* start of the defrag operation */ |
| __u64 start; |
| |
| /* number of bytes to defrag, use (u64)-1 to say all */ |
| __u64 len; |
| |
| /* |
| * flags for the operation, which can include turning |
| * on compression for this one defrag |
| */ |
| __u64 flags; |
| |
| /* |
| * any extent bigger than this will be considered |
| * already defragged. Use 0 to take the kernel default |
| * Use 1 to say every single extent must be rewritten |
| */ |
| __u32 extent_thresh; |
| |
| /* |
| * which compression method to use if turning on compression |
| * for this defrag operation. If unspecified, zlib will |
| * be used |
| */ |
| __u32 compress_type; |
| |
| /* spare for later */ |
| __u32 unused[4]; |
| }; |
| |
| |
| /* |
| * 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 |
| /* reserve 2-15 close to the inode for later flexibility */ |
| |
| /* |
| * dir items are the name -> inode pointers in a directory. There is one |
| * for every name in a directory. |
| */ |
| #define BTRFS_DIR_LOG_ITEM_KEY 60 |
| #define BTRFS_DIR_LOG_INDEX_KEY 72 |
| #define BTRFS_DIR_ITEM_KEY 84 |
| #define BTRFS_DIR_INDEX_KEY 96 |
| /* |
| * extent data is for file data |
| */ |
| #define BTRFS_EXTENT_DATA_KEY 108 |
| |
| /* |
| * 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. They 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 |
| |
| #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 |
| |
| /* |
| * Records the overall state of the qgroups. |
| * There's only one instance of this key present, |
| * (0, BTRFS_QGROUP_STATUS_KEY, 0) |
| */ |
| #define BTRFS_QGROUP_STATUS_KEY 240 |
| /* |
| * Records the currently used space of the qgroup. |
| * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid). |
| */ |
| #define BTRFS_QGROUP_INFO_KEY 242 |
| /* |
| * Contains the user configured limits for the qgroup. |
| * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid). |
| */ |
| #define BTRFS_QGROUP_LIMIT_KEY 244 |
| /* |
| * Records the child-parent relationship of qgroups. For |
| * each relation, 2 keys are present: |
| * (childid, BTRFS_QGROUP_RELATION_KEY, parentid) |
| * (parentid, BTRFS_QGROUP_RELATION_KEY, childid) |
| */ |
| #define BTRFS_QGROUP_RELATION_KEY 246 |
| |
| #define BTRFS_BALANCE_ITEM_KEY 248 |
| |
| /* |
| * Persistantly 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 |
| |
| /* |
| * Persistantly 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 |
| |
| /* |
| * Flags for mount options. |
| * |
| * Note: don't forget to add new options to btrfs_show_options() |
| */ |
| #define BTRFS_MOUNT_NODATASUM (1 << 0) |
| #define BTRFS_MOUNT_NODATACOW (1 << 1) |
| #define BTRFS_MOUNT_NOBARRIER (1 << 2) |
| #define BTRFS_MOUNT_SSD (1 << 3) |
| #define BTRFS_MOUNT_DEGRADED (1 << 4) |
| #define BTRFS_MOUNT_COMPRESS (1 << 5) |
| #define BTRFS_MOUNT_NOTREELOG (1 << 6) |
| #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) |
| #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) |
| #define BTRFS_MOUNT_NOSSD (1 << 9) |
| #define BTRFS_MOUNT_DISCARD (1 << 10) |
| #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) |
| #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) |
| #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) |
| #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) |
| #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) |
| #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) |
| #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) |
| #define BTRFS_MOUNT_RECOVERY (1 << 18) |
| #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) |
| #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) |
| #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) |
| #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) |
| #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) |
| #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) |
| #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) |
| |
| #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) |
| #define BTRFS_DEFAULT_MAX_INLINE (8192) |
| |
| #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) |
| #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) |
| #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) |
| #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ |
| BTRFS_MOUNT_##opt) |
| |
| #define btrfs_set_and_info(root, opt, fmt, args...) \ |
| { \ |
| if (!btrfs_test_opt(root, opt)) \ |
| btrfs_info(root->fs_info, fmt, ##args); \ |
| btrfs_set_opt(root->fs_info->mount_opt, opt); \ |
| } |
| |
| #define btrfs_clear_and_info(root, opt, fmt, args...) \ |
| { \ |
| if (btrfs_test_opt(root, opt)) \ |
| btrfs_info(root->fs_info, fmt, ##args); \ |
| btrfs_clear_opt(root->fs_info->mount_opt, opt); \ |
| } |
| |
| #ifdef CONFIG_BTRFS_DEBUG |
| static inline int |
| btrfs_should_fragment_free_space(struct btrfs_root *root, |
| struct btrfs_block_group_cache *block_group) |
| { |
| return (btrfs_test_opt(root, FRAGMENT_METADATA) && |
| block_group->flags & BTRFS_BLOCK_GROUP_METADATA) || |
| (btrfs_test_opt(root, FRAGMENT_DATA) && |
| block_group->flags & BTRFS_BLOCK_GROUP_DATA); |
| } |
| #endif |
| |
| /* |
| * Requests for changes that need to be done during transaction commit. |
| * |
| * Internal mount options that are used for special handling of the real |
| * mount options (eg. cannot be set during remount and have to be set during |
| * transaction commit) |
| */ |
| |
| #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) |
| #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) |
| #define BTRFS_PENDING_COMMIT (2) |
| |
| #define btrfs_test_pending(info, opt) \ |
| test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) |
| #define btrfs_set_pending(info, opt) \ |
| set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) |
| #define btrfs_clear_pending(info, opt) \ |
| clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) |
| |
| /* |
| * Helpers for setting pending mount option changes. |
| * |
| * Expects corresponding macros |
| * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name |
| */ |
| #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ |
| do { \ |
| if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ |
| btrfs_info((info), fmt, ##args); \ |
| btrfs_set_pending((info), SET_##opt); \ |
| btrfs_clear_pending((info), CLEAR_##opt); \ |
| } \ |
| } while(0) |
| |
| #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ |
| do { \ |
| if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ |
| btrfs_info((info), fmt, ##args); \ |
| btrfs_set_pending((info), CLEAR_##opt); \ |
| btrfs_clear_pending((info), SET_##opt); \ |
| } \ |
| } while(0) |
| |
| /* |
| * Inode flags |
| */ |
| #define BTRFS_INODE_NODATASUM (1 << 0) |
| #define BTRFS_INODE_NODATACOW (1 << 1) |
| #define BTRFS_INODE_READONLY (1 << 2) |
| #define BTRFS_INODE_NOCOMPRESS (1 << 3) |
| #define BTRFS_INODE_PREALLOC (1 << 4) |
| #define BTRFS_INODE_SYNC (1 << 5) |
| #define BTRFS_INODE_IMMUTABLE (1 << 6) |
| #define BTRFS_INODE_APPEND (1 << 7) |
| #define BTRFS_INODE_NODUMP (1 << 8) |
| #define BTRFS_INODE_NOATIME (1 << 9) |
| #define BTRFS_INODE_DIRSYNC (1 << 10) |
| #define BTRFS_INODE_COMPRESS (1 << 11) |
| |
| #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) |
| |
| struct btrfs_map_token { |
| struct extent_buffer *eb; |
| char *kaddr; |
| unsigned long offset; |
| }; |
| |
| static inline void btrfs_init_map_token (struct btrfs_map_token *token) |
| { |
| token->kaddr = NULL; |
| } |
| |
| /* some macros to generate set/get funcs for the struct fields. This |
| * assumes there is a lefoo_to_cpu for every type, so lets make a simple |
| * one for u8: |
| */ |
| #define le8_to_cpu(v) (v) |
| #define cpu_to_le8(v) (v) |
| #define __le8 u8 |
| |
| #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 DECLARE_BTRFS_SETGET_BITS(bits) \ |
| u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \ |
| unsigned long off, \ |
| struct btrfs_map_token *token); \ |
| void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \ |
| unsigned long off, u##bits val, \ |
| struct btrfs_map_token *token); \ |
| static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \ |
| unsigned long off) \ |
| { \ |
| return btrfs_get_token_##bits(eb, ptr, off, NULL); \ |
| } \ |
| static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \ |
| unsigned long off, u##bits val) \ |
| { \ |
| btrfs_set_token_##bits(eb, ptr, off, val, NULL); \ |
| } |
| |
| DECLARE_BTRFS_SETGET_BITS(8) |
| DECLARE_BTRFS_SETGET_BITS(16) |
| DECLARE_BTRFS_SETGET_BITS(32) |
| DECLARE_BTRFS_SETGET_BITS(64) |
| |
| #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ |
| static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \ |
| { \ |
| BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ |
| return btrfs_get_##bits(eb, s, offsetof(type, member)); \ |
| } \ |
| static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ |
| u##bits val) \ |
| { \ |
| BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ |
| btrfs_set_##bits(eb, s, offsetof(type, member), val); \ |
| } \ |
| static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \ |
| struct btrfs_map_token *token) \ |
| { \ |
| BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ |
| return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ |
| } \ |
| static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ |
| type *s, u##bits val, \ |
| struct btrfs_map_token *token) \ |
| { \ |
| BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ |
| btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ |
| } |
| |
| #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ |
| static inline u##bits btrfs_##name(struct extent_buffer *eb) \ |
| { \ |
| type *p = page_address(eb->pages[0]); \ |
| u##bits res = le##bits##_to_cpu(p->member); \ |
| return res; \ |
| } \ |
| static inline void btrfs_set_##name(struct extent_buffer *eb, \ |
| u##bits val) \ |
| { \ |
| type *p = page_address(eb->pages[0]); \ |
| 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 unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) |
| { |
| return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); |
| } |
| |
| static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) |
| { |
| return (unsigned long)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 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)); |
| } |
| |
| /* 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_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, |
| sequence, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, |
| transid, 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); |
| 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 unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) |
| { |
| unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); |
| return (unsigned long)dev + ptr; |
| } |
| |
| 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); |
| |
| 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); |
| |
| 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); |
| BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, |
| blockptr, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_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; |
| } |
| |
| void btrfs_node_key(struct extent_buffer *eb, |
| struct btrfs_disk_key *disk_key, int nr); |
| |
| 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); |
| BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); |
| BTRFS_SETGET_STACK_FUNCS(stack_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); |
| |
| /* 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_type, struct btrfs_dir_item, type, 8); |
| BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, |
| data_len, 16); |
| BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, |
| name_len, 16); |
| BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, |
| transid, 64); |
| |
| 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); |
| } |
| |
| 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_generation, struct btrfs_header, |
| generation, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, |
| nritems, 32); |
| BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 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 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); |
| |
| static inline bool btrfs_root_readonly(struct btrfs_root *root) |
| { |
| return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; |
| } |
| |
| static inline bool btrfs_root_dead(struct btrfs_root *root) |
| { |
| return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; |
| } |
| |
| /* 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_balance_item */ |
| BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); |
| |
| static inline void btrfs_balance_data(struct extent_buffer *eb, |
| struct btrfs_balance_item *bi, |
| struct btrfs_disk_balance_args *ba) |
| { |
| read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); |
| } |
| |
| static inline void btrfs_set_balance_data(struct extent_buffer *eb, |
| struct btrfs_balance_item *bi, |
| struct btrfs_disk_balance_args *ba) |
| { |
| write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); |
| } |
| |
| static inline void btrfs_balance_meta(struct extent_buffer *eb, |
| struct btrfs_balance_item *bi, |
| struct btrfs_disk_balance_args *ba) |
| { |
| read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); |
| } |
| |
| static inline void btrfs_set_balance_meta(struct extent_buffer *eb, |
| struct btrfs_balance_item *bi, |
| struct btrfs_disk_balance_args *ba) |
| { |
| write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); |
| } |
| |
| static inline void btrfs_balance_sys(struct extent_buffer *eb, |
| struct btrfs_balance_item *bi, |
| struct btrfs_disk_balance_args *ba) |
| { |
| read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); |
| } |
| |
| static inline void btrfs_set_balance_sys(struct extent_buffer *eb, |
| struct btrfs_balance_item *bi, |
| struct btrfs_disk_balance_args *ba) |
| { |
| write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); |
| } |
| |
| static inline void |
| btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, |
| struct btrfs_disk_balance_args *disk) |
| { |
| memset(cpu, 0, sizeof(*cpu)); |
| |
| cpu->profiles = le64_to_cpu(disk->profiles); |
| cpu->usage = le64_to_cpu(disk->usage); |
| cpu->devid = le64_to_cpu(disk->devid); |
| cpu->pstart = le64_to_cpu(disk->pstart); |
| cpu->pend = le64_to_cpu(disk->pend); |
| cpu->vstart = le64_to_cpu(disk->vstart); |
| cpu->vend = le64_to_cpu(disk->vend); |
| cpu->target = le64_to_cpu(disk->target); |
| cpu->flags = le64_to_cpu(disk->flags); |
| cpu->limit = le64_to_cpu(disk->limit); |
| } |
| |
| static inline void |
| btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, |
| struct btrfs_balance_args *cpu) |
| { |
| memset(disk, 0, sizeof(*disk)); |
| |
| disk->profiles = cpu_to_le64(cpu->profiles); |
| disk->usage = cpu_to_le64(cpu->usage); |
| disk->devid = cpu_to_le64(cpu->devid); |
| disk->pstart = cpu_to_le64(cpu->pstart); |
| disk->pend = cpu_to_le64(cpu->pend); |
| disk->vstart = cpu_to_le64(cpu->vstart); |
| disk->vend = cpu_to_le64(cpu->vend); |
| disk->target = cpu_to_le64(cpu->target); |
| disk->flags = cpu_to_le64(cpu->flags); |
| disk->limit = cpu_to_le64(cpu->limit); |
| } |
| |
| /* 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_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_magic, struct btrfs_super_block, magic, 64); |
| BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, |
| uuid_tree_generation, 64); |
| |
| static inline int btrfs_super_csum_size(struct btrfs_super_block *s) |
| { |
| u16 t = btrfs_super_csum_type(s); |
| /* |
| * csum type is validated at mount time |
| */ |
| 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_disk_bytenr, |
| struct btrfs_file_extent_item, disk_bytenr, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, |
| struct btrfs_file_extent_item, offset, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, |
| struct btrfs_file_extent_item, generation, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, |
| struct btrfs_file_extent_item, num_bytes, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, |
| struct btrfs_file_extent_item, disk_num_bytes, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, |
| struct btrfs_file_extent_item, compression, 8); |
| |
| static inline unsigned long |
| btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e) |
| { |
| return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; |
| } |
| |
| static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) |
| { |
| return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; |
| } |
| |
| BTRFS_SETGET_FUNCS(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_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_FUNCS(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_FUNCS(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 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 btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; |
| } |
| |
| /* 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) |
| { |
| struct btrfs_map_token token; |
| |
| btrfs_init_map_token(&token); |
| /* |
| * return the space used on disk if this item isn't |
| * compressed or encoded |
| */ |
| if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 && |
| btrfs_token_file_extent_encryption(eb, fi, &token) == 0 && |
| btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) { |
| return btrfs_file_extent_inline_item_len(eb, |
| btrfs_item_nr(slot)); |
| } |
| |
| /* otherwise use the ram bytes field */ |
| return btrfs_token_file_extent_ram_bytes(eb, fi, &token); |
| } |
| |
| |
| /* btrfs_dev_stats_item */ |
| static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb, |
| struct btrfs_dev_stats_item *ptr, |
| int index) |
| { |
| u64 val; |
| |
| read_extent_buffer(eb, &val, |
| offsetof(struct btrfs_dev_stats_item, values) + |
| ((unsigned long)ptr) + (index * sizeof(u64)), |
| sizeof(val)); |
| return val; |
| } |
| |
| static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb, |
| struct btrfs_dev_stats_item *ptr, |
| int index, u64 val) |
| { |
| write_extent_buffer(eb, &val, |
| offsetof(struct btrfs_dev_stats_item, values) + |
| ((unsigned long)ptr) + (index * sizeof(u64)), |
| sizeof(val)); |
| } |
| |
| /* btrfs_qgroup_status_item */ |
| BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, |
| generation, 64); |
| BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, |
| version, 64); |
| BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, |
| flags, 64); |
| BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, |
| rescan, 64); |
| |
| /* btrfs_qgroup_info_item */ |
| BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, |
| generation, 64); |
| BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); |
| BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, |
| rfer_cmpr, 64); |
| BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); |
| BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, |
| excl_cmpr, 64); |
| |
| BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, |
| struct btrfs_qgroup_info_item, generation, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, |
| rfer, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, |
| struct btrfs_qgroup_info_item, rfer_cmpr, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, |
| excl, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, |
| struct btrfs_qgroup_info_item, excl_cmpr, 64); |
| |
| /* btrfs_qgroup_limit_item */ |
| BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, |
| flags, 64); |
| BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, |
| max_rfer, 64); |
| BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, |
| max_excl, 64); |
| BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, |
| rsv_rfer, 64); |
| BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, |
| rsv_excl, 64); |
| |
| /* btrfs_dev_replace_item */ |
| BTRFS_SETGET_FUNCS(dev_replace_src_devid, |
| struct btrfs_dev_replace_item, src_devid, 64); |
| BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, |
| struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, |
| 64); |
| BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, |
| replace_state, 64); |
| BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, |
| time_started, 64); |
| BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, |
| time_stopped, 64); |
| BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, |
| num_write_errors, 64); |
| BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, |
| struct btrfs_dev_replace_item, num_uncorrectable_read_errors, |
| 64); |
| BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, |
| cursor_left, 64); |
| BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, |
| cursor_right, 64); |
| |
| BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, |
| struct btrfs_dev_replace_item, src_devid, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, |
| struct btrfs_dev_replace_item, |
| cont_reading_from_srcdev_mode, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, |
| struct btrfs_dev_replace_item, replace_state, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, |
| struct btrfs_dev_replace_item, time_started, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, |
| struct btrfs_dev_replace_item, time_stopped, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, |
| struct btrfs_dev_replace_item, num_write_errors, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, |
| struct btrfs_dev_replace_item, |
| num_uncorrectable_read_errors, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, |
| struct btrfs_dev_replace_item, cursor_left, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, |
| struct btrfs_dev_replace_item, cursor_right, 64); |
| |
| static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) |
| { |
| return sb->s_fs_info; |
| } |
| |
|