| /* |
| * 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/version.h> |
| #include <linux/mm.h> |
| #include <linux/highmem.h> |
| #include <linux/fs.h> |
| #include <linux/workqueue.h> |
| #include <linux/completion.h> |
| #include <linux/backing-dev.h> |
| #include <asm/kmap_types.h> |
| #include "bit-radix.h" |
| #include "extent_io.h" |
| #include "extent_map.h" |
| |
| struct btrfs_trans_handle; |
| struct btrfs_transaction; |
| 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; |
| |
| #define BTRFS_MAGIC "_B5RfS_M" |
| |
| #define BTRFS_MAX_LEVEL 8 |
| |
| /* 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 |
| |
| /* |
| * All files have objectids higher than this. |
| */ |
| #define BTRFS_FIRST_FREE_OBJECTID 256ULL |
| #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL |
| |
| |
| /* |
| * the device items go into the chunk tree. The key is in the form |
| * [ 1 BTRFS_DEV_ITEM_KEY device_id ] |
| */ |
| #define BTRFS_DEV_ITEMS_OBJECTID 1ULL |
| |
| /* |
| * we can actually store much bigger names, but lets not confuse the rest |
| * of linux |
| */ |
| #define BTRFS_NAME_LEN 255 |
| |
| /* 32 bytes in various csum fields */ |
| #define BTRFS_CSUM_SIZE 32 |
| /* four bytes for CRC32 */ |
| #define BTRFS_CRC32_SIZE 4 |
| #define BTRFS_EMPTY_DIR_SIZE 0 |
| |
| #define BTRFS_FT_UNKNOWN 0 |
| #define BTRFS_FT_REG_FILE 1 |
| #define BTRFS_FT_DIR 2 |
| #define BTRFS_FT_CHRDEV 3 |
| #define BTRFS_FT_BLKDEV 4 |
| #define BTRFS_FT_FIFO 5 |
| #define BTRFS_FT_SOCK 6 |
| #define BTRFS_FT_SYMLINK 7 |
| #define BTRFS_FT_XATTR 8 |
| #define BTRFS_FT_MAX 9 |
| |
| /* |
| * the key defines the order in the tree, and so it also defines (optimal) |
| * block layout. objectid corresonds to the inode number. The flags |
| * tells us things about the object, and is a kind of stream selector. |
| * so for a given inode, keys with flags of 1 might refer to the inode |
| * data, flags of 2 may point to file data in the btree and flags == 3 |
| * may point to extents. |
| * |
| * offset is the starting byte offset for this key in the stream. |
| * |
| * btrfs_disk_key is in disk byte order. struct btrfs_key is always |
| * in cpu native order. Otherwise they are identical and their sizes |
| * should be the same (ie both packed) |
| */ |
| struct btrfs_disk_key { |
| __le64 objectid; |
| u8 type; |
| __le64 offset; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_key { |
| u64 objectid; |
| u8 type; |
| u64 offset; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_mapping_tree { |
| struct extent_map_tree map_tree; |
| }; |
| |
| #define BTRFS_UUID_SIZE 16 |
| struct btrfs_dev_item { |
| /* the internal btrfs device id */ |
| __le64 devid; |
| |
| /* size of the device */ |
| __le64 total_bytes; |
| |
| /* bytes used */ |
| __le64 bytes_used; |
| |
| /* optimal io alignment for this device */ |
| __le32 io_align; |
| |
| /* optimal io width for this device */ |
| __le32 io_width; |
| |
| /* minimal io size for this device */ |
| __le32 sector_size; |
| |
| /* type and info about this device */ |
| __le64 type; |
| |
| /* 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]; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_stripe { |
| __le64 devid; |
| __le64 offset; |
| u8 dev_uuid[BTRFS_UUID_SIZE]; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_chunk { |
| /* size of this chunk in bytes */ |
| __le64 length; |
| |
| /* objectid of the root referencing this chunk */ |
| __le64 owner; |
| |
| __le64 stripe_len; |
| __le64 type; |
| |
| /* optimal io alignment for this chunk */ |
| __le32 io_align; |
| |
| /* optimal io width for this chunk */ |
| __le32 io_width; |
| |
| /* minimal io size for this chunk */ |
| __le32 sector_size; |
| |
| /* 2^16 stripes is quite a lot, a second limit is the size of a single |
| * item in the btree |
| */ |
| __le16 num_stripes; |
| |
| /* sub stripes only matter for raid10 */ |
| __le16 sub_stripes; |
| struct btrfs_stripe stripe; |
| /* additional stripes go here */ |
| } __attribute__ ((__packed__)); |
| |
| static inline unsigned long btrfs_chunk_item_size(int num_stripes) |
| { |
| BUG_ON(num_stripes == 0); |
| return sizeof(struct btrfs_chunk) + |
| sizeof(struct btrfs_stripe) * (num_stripes - 1); |
| } |
| |
| #define BTRFS_FSID_SIZE 16 |
| #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0) |
| |
| /* |
| * every tree block (leaf or node) starts with this header. |
| */ |
| struct btrfs_header { |
| /* these first four must match the super block */ |
| u8 csum[BTRFS_CSUM_SIZE]; |
| u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
| __le64 bytenr; /* which block this node is supposed to live in */ |
| __le64 flags; |
| |
| /* allowed to be different from the super from here on down */ |
| u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
| __le64 generation; |
| __le64 owner; |
| __le32 nritems; |
| u8 level; |
| } __attribute__ ((__packed__)); |
| |
| #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ |
| sizeof(struct btrfs_header)) / \ |
| sizeof(struct btrfs_key_ptr)) |
| #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
| #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) |
| #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
| sizeof(struct btrfs_item) - \ |
| sizeof(struct btrfs_file_extent_item)) |
| |
| |
| /* |
| * 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 |
| |
| /* |
| * 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[16]; /* 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 total_bytes; |
| __le64 bytes_used; |
| __le64 root_dir_objectid; |
| __le64 num_devices; |
| __le32 sectorsize; |
| __le32 nodesize; |
| __le32 leafsize; |
| __le32 stripesize; |
| __le32 sys_chunk_array_size; |
| u8 root_level; |
| u8 chunk_root_level; |
| struct btrfs_dev_item dev_item; |
| char label[BTRFS_LABEL_SIZE]; |
| u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; |
| } __attribute__ ((__packed__)); |
| |
| /* |
| * A leaf is full of items. offset and size tell us where to find |
| * the item in the leaf (relative to the start of the data area) |
| */ |
| struct btrfs_item { |
| struct btrfs_disk_key key; |
| __le32 offset; |
| __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]; |
| int reada; |
| int lowest_level; |
| }; |
| |
| /* |
| * items in the extent btree are used to record the objectid of the |
| * owner of the block and the number of references |
| */ |
| struct btrfs_extent_item { |
| __le32 refs; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_extent_ref { |
| __le64 root; |
| __le64 generation; |
| __le64 objectid; |
| __le64 offset; |
| } __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 { |
| __le16 name_len; |
| /* name goes here */ |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_timespec { |
| __le64 sec; |
| __le32 nsec; |
| } __attribute__ ((__packed__)); |
| |
| /* |
| * there is no padding here on purpose. If you want to extent the inode, |
| * make a new item type |
| */ |
| struct btrfs_inode_item { |
| __le64 generation; |
| __le64 size; |
| __le64 nblocks; |
| __le64 block_group; |
| __le32 nlink; |
| __le32 uid; |
| __le32 gid; |
| __le32 mode; |
| __le64 rdev; |
| __le16 flags; |
| __le16 compat_flags; |
| struct btrfs_timespec atime; |
| struct btrfs_timespec ctime; |
| struct btrfs_timespec mtime; |
| struct btrfs_timespec otime; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_dir_item { |
| struct btrfs_disk_key location; |
| __le16 data_len; |
| __le16 name_len; |
| u8 type; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_root_item { |
| struct btrfs_inode_item inode; |
| __le64 root_dirid; |
| __le64 bytenr; |
| __le64 byte_limit; |
| __le64 bytes_used; |
| __le32 flags; |
| __le32 refs; |
| struct btrfs_disk_key drop_progress; |
| u8 drop_level; |
| u8 level; |
| } __attribute__ ((__packed__)); |
| |
| #define BTRFS_FILE_EXTENT_REG 0 |
| #define BTRFS_FILE_EXTENT_INLINE 1 |
| |
| struct btrfs_file_extent_item { |
| __le64 generation; |
| u8 type; |
| /* |
| * disk space consumed by the extent, checksum blocks are included |
| * in these numbers |
| */ |
| __le64 disk_bytenr; |
| __le64 disk_num_bytes; |
| /* |
| * the logical offset in file blocks (no csums) |
| * this extent record is for. This allows a file extent to point |
| * into the middle of an existing extent on disk, sharing it |
| * between two snapshots (useful if some bytes in the middle of the |
| * extent have changed |
| */ |
| __le64 offset; |
| /* |
| * the logical number of file blocks (no csums included) |
| */ |
| __le64 num_bytes; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_csum_item { |
| u8 csum; |
| } __attribute__ ((__packed__)); |
| |
| /* different types of block groups (and chunks) */ |
| #define BTRFS_BLOCK_GROUP_DATA (1 << 0) |
| #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1) |
| #define BTRFS_BLOCK_GROUP_METADATA (1 << 2) |
| #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3) |
| #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4) |
| #define BTRFS_BLOCK_GROUP_DUP (1 << 5) |
| #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6) |
| |
| |
| struct btrfs_block_group_item { |
| __le64 used; |
| __le64 chunk_objectid; |
| __le64 flags; |
| } __attribute__ ((__packed__)); |
| |
| struct btrfs_space_info { |
| u64 flags; |
| u64 total_bytes; |
| u64 bytes_used; |
| u64 bytes_pinned; |
| int full; |
| struct list_head list; |
| }; |
| |
| struct btrfs_block_group_cache { |
| struct btrfs_key key; |
| struct btrfs_block_group_item item; |
| struct btrfs_space_info *space_info; |
| u64 pinned; |
| u64 flags; |
| int cached; |
| int ro; |
| }; |
| |
| struct btrfs_device; |
| struct btrfs_fs_devices; |
| 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 radix_tree_root fs_roots_radix; |
| |
| struct extent_io_tree free_space_cache; |
| struct extent_io_tree block_group_cache; |
| struct extent_io_tree pinned_extents; |
| struct extent_io_tree pending_del; |
| struct extent_io_tree extent_ins; |
| |
| /* logical->physical extent mapping */ |
| struct btrfs_mapping_tree mapping_tree; |
| |
| u64 generation; |
| u64 last_trans_committed; |
| unsigned long mount_opt; |
| u64 max_extent; |
| u64 max_inline; |
| u64 alloc_start; |
| struct btrfs_transaction *running_transaction; |
| 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; |
| spinlock_t hash_lock; |
| struct mutex trans_mutex; |
| struct mutex fs_mutex; |
| struct list_head trans_list; |
| struct list_head hashers; |
| struct list_head dead_roots; |
| struct list_head end_io_work_list; |
| struct list_head async_submit_work_list; |
| struct work_struct end_io_work; |
| struct work_struct async_submit_work; |
| spinlock_t end_io_work_lock; |
| spinlock_t async_submit_work_lock; |
| |
| #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18) |
| struct work_struct trans_work; |
| #else |
| struct delayed_work trans_work; |
| #endif |
| struct kobject super_kobj; |
| struct completion kobj_unregister; |
| int do_barriers; |
| int closing; |
| unsigned long throttles; |
| |
| u64 total_pinned; |
| struct list_head dirty_cowonly_roots; |
| |
| struct btrfs_fs_devices *fs_devices; |
| struct list_head space_info; |
| spinlock_t delalloc_lock; |
| spinlock_t new_trans_lock; |
| u64 delalloc_bytes; |
| u64 last_alloc; |
| u64 last_data_alloc; |
| |
| u64 avail_data_alloc_bits; |
| u64 avail_metadata_alloc_bits; |
| u64 avail_system_alloc_bits; |
| u64 data_alloc_profile; |
| u64 metadata_alloc_profile; |
| u64 system_alloc_profile; |
| |
| void *bdev_holder; |
| }; |
| |
| /* |
| * in ram representation of the tree. extent_root is used for all allocations |
| * and for the extent tree extent_root root. |
| */ |
| struct btrfs_root { |
| struct extent_buffer *node; |
| struct extent_buffer *commit_root; |
| struct btrfs_root_item root_item; |
| struct btrfs_key root_key; |
| struct btrfs_fs_info *fs_info; |
| struct inode *inode; |
| struct kobject root_kobj; |
| struct completion kobj_unregister; |
| u64 objectid; |
| u64 last_trans; |
| |
| /* data allocations are done in sectorsize units */ |
| u32 sectorsize; |
| |
| /* node allocations are done in nodesize units */ |
| u32 nodesize; |
| |
| /* leaf allocations are done in leafsize units */ |
| u32 leafsize; |
| |
| u32 stripesize; |
| |
| u32 type; |
| u64 highest_inode; |
| u64 last_inode_alloc; |
| int ref_cows; |
| int track_dirty; |
| struct btrfs_key defrag_progress; |
| int defrag_running; |
| int defrag_level; |
| char *name; |
| int in_sysfs; |
| |
| /* the dirty list is only used by non-reference counted roots */ |
| struct list_head dirty_list; |
| }; |
| |
| /* |
| |
| * 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 2 |
| #define BTRFS_XATTR_ITEM_KEY 8 |
| /* 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_ITEM_KEY 16 |
| #define BTRFS_DIR_INDEX_KEY 17 |
| /* |
| * extent data is for file data |
| */ |
| #define BTRFS_EXTENT_DATA_KEY 18 |
| /* |
| * csum items have the checksums for data in the extents |
| */ |
| #define BTRFS_CSUM_ITEM_KEY 19 |
| |
| /* reserve 20-31 for other file stuff */ |
| |
| /* |
| * root items point to tree roots. There are typically in the root |
| * tree used by the super block to find all the other trees |
| */ |
| #define BTRFS_ROOT_ITEM_KEY 32 |
| /* |
| * 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 33 |
| #define BTRFS_EXTENT_REF_KEY 34 |
| |
| /* |
| * block groups give us hints into the extent allocation trees. Which |
| * blocks are free etc etc |
| */ |
| #define BTRFS_BLOCK_GROUP_ITEM_KEY 50 |
| |
| #define BTRFS_DEV_EXTENT_KEY 75 |
| #define BTRFS_DEV_ITEM_KEY 76 |
| #define BTRFS_CHUNK_ITEM_KEY 77 |
| |
| /* |
| * string items are for debugging. They just store a short string of |
| * data in the FS |
| */ |
| #define BTRFS_STRING_ITEM_KEY 253 |
| |
| #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_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) |
| #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) |
| #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ |
| BTRFS_MOUNT_##opt) |
| /* |
| * Inode flags |
| */ |
| #define BTRFS_INODE_NODATASUM (1 << 0) |
| #define BTRFS_INODE_NODATACOW (1 << 1) |
| #define BTRFS_INODE_READONLY (1 << 2) |
| #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \ |
| ~BTRFS_INODE_##flag) |
| #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \ |
| BTRFS_INODE_##flag) |
| #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \ |
| BTRFS_INODE_##flag) |
| /* 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))) |
| |
| #ifndef BTRFS_SETGET_FUNCS |
| #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ |
| u##bits btrfs_##name(struct extent_buffer *eb, type *s); \ |
| void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); |
| #endif |
| |
| #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ |
| static inline u##bits btrfs_##name(struct extent_buffer *eb) \ |
| { \ |
| type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
| u##bits res = le##bits##_to_cpu(p->member); \ |
| kunmap_atomic(p, KM_USER0); \ |
| return res; \ |
| } \ |
| static inline void btrfs_set_##name(struct extent_buffer *eb, \ |
| u##bits val) \ |
| { \ |
| type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
| p->member = cpu_to_le##bits(val); \ |
| kunmap_atomic(p, KM_USER0); \ |
| } |
| |
| #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_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_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); |
| |
| static inline char *btrfs_device_uuid(struct btrfs_dev_item *d) |
| { |
| return (char *)d + offsetof(struct btrfs_dev_item, uuid); |
| } |
| |
| BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); |
| BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); |
| BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); |
| BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); |
| BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); |
| BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); |
| BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); |
| BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); |
| BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); |
| BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); |
| BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); |
| |
| static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) |
| { |
| return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); |
| } |
| |
| BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, |
| stripe_len, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, |
| io_align, 32); |
| BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, |
| io_width, 32); |
| BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, |
| sector_size, 32); |
| BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, |
| num_stripes, 16); |
| BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, |
| sub_stripes, 16); |
| BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); |
| |
| static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, |
| int nr) |
| { |
| unsigned long offset = (unsigned long)c; |
| offset += offsetof(struct btrfs_chunk, stripe); |
| offset += nr * sizeof(struct btrfs_stripe); |
| return (struct btrfs_stripe *)offset; |
| } |
| |
| static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) |
| { |
| return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); |
| } |
| |
| static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, |
| struct btrfs_chunk *c, int nr) |
| { |
| return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); |
| } |
| |
| static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb, |
| struct btrfs_chunk *c, int nr, |
| u64 val) |
| { |
| btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val); |
| } |
| |
| static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, |
| struct btrfs_chunk *c, int nr) |
| { |
| return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); |
| } |
| |
| static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb, |
| struct btrfs_chunk *c, int nr, |
| u64 val) |
| { |
| btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val); |
| } |
| |
| /* struct btrfs_block_group_item */ |
| BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, |
| used, 64); |
| BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, |
| used, 64); |
| BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, |
| struct btrfs_block_group_item, chunk_objectid, 64); |
| |
| BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, |
| struct btrfs_block_group_item, chunk_objectid, 64); |
| BTRFS_SETGET_FUNCS(disk_block_group_flags, |
| struct btrfs_block_group_item, flags, 64); |
| BTRFS_SETGET_STACK_FUNCS(block_group_flags, |
| struct btrfs_block_group_item, flags, 64); |
| |
| /* struct btrfs_inode_ref */ |
| BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); |
| |
| /* struct btrfs_inode_item */ |
| BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); |
| BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); |
| BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 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, 16); |
| BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item, |
| compat_flags, 16); |
| |
| static inline struct btrfs_timespec * |
| btrfs_inode_atime(struct btrfs_inode_item *inode_item) |
| { |
| unsigned long ptr = (unsigned long)inode_item; |
| ptr += offsetof(struct btrfs_inode_item, atime); |
| return (struct btrfs_timespec *)ptr; |
| } |
| |
| static inline struct btrfs_timespec * |
| btrfs_inode_mtime(struct btrfs_inode_item *inode_item) |
| { |
| unsigned long ptr = (unsigned long)inode_item; |
| ptr += offsetof(struct btrfs_inode_item, mtime); |
| return (struct btrfs_timespec *)ptr; |
| } |
| |
| static inline struct btrfs_timespec * |
| btrfs_inode_ctime(struct btrfs_inode_item *inode_item) |
| { |
| unsigned long ptr = (unsigned long)inode_item; |
| ptr += offsetof(struct btrfs_inode_item, ctime); |
| return (struct btrfs_timespec *)ptr; |
| } |
| |
| static inline struct btrfs_timespec * |
| btrfs_inode_otime(struct btrfs_inode_item *inode_item) |
| { |
| unsigned long ptr = (unsigned long)inode_item; |
| ptr += offsetof(struct btrfs_inode_item, otime); |
| return (struct btrfs_timespec *)ptr; |
| } |
| |
| BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); |
| BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); |
| |
| /* struct btrfs_extent_item */ |
| BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32); |
| |
| /* struct btrfs_dev_extent */ |
| BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, |
| chunk_tree, 64); |
| BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, |
| chunk_objectid, 64); |
| BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, |
| chunk_offset, 64); |
| BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); |
| |
| static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) |
| { |
| unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); |
| return (u8 *)((unsigned long)dev + ptr); |
| } |
| |
| /* struct btrfs_extent_ref */ |
| BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64); |
| BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64); |
| BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64); |
| BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64); |
| |
| BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref, |
| generation, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref, |
| objectid, 64); |
| BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64); |
| |
| BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, |
| refs, 32); |
| |
| /* struct btrfs_node */ |
| BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); |
| BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); |
| |
| static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) |
| { |
| unsigned long ptr; |
| ptr = offsetof(struct btrfs_node, ptrs) + |
| sizeof(struct btrfs_key_ptr) * nr; |
| return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); |
| } |
| |
| static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, |
| int nr, u64 val) |
| { |
| unsigned long ptr; |
| ptr = offsetof(struct btrfs_node, ptrs) + |
| sizeof(struct btrfs_key_ptr) * nr; |
| btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); |
| } |
| |
| static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) |
| { |
| unsigned long ptr; |
| ptr = offsetof(struct btrfs_node, ptrs) + |
| sizeof(struct btrfs_key_ptr) * nr; |
| return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); |
| } |
| |
| static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, |
| int nr, u64 val) |
| { |
| unsigned long ptr; |
| ptr = offsetof(struct btrfs_node, ptrs) + |
| sizeof(struct btrfs_key_ptr) * nr; |
| btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); |
| } |
| |
| static inline unsigned long btrfs_node_key_ptr_offset(int nr) |
| { |
| return offsetof(struct btrfs_node, ptrs) + |
| sizeof(struct btrfs_key_ptr) * nr; |
| } |
| |
| 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); |
| |
| 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(struct extent_buffer *eb, |
| 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(eb, nr)); |
| } |
| |
| static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) |
| { |
| return btrfs_item_offset(eb, btrfs_item_nr(eb, nr)); |
| } |
| |
| static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) |
| { |
| return btrfs_item_size(eb, btrfs_item_nr(eb, 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(eb, 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(eb, nr); |
| write_eb_member(eb, item, struct btrfs_item, key, disk_key); |
| } |
| |
| /* 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); |
| |
| static inline void btrfs_dir_item_key(struct extent_buffer *eb, |
| struct btrfs_dir_item *item, |
| struct btrfs_disk_key *key) |
| { |
| read_eb_member(eb, item, struct btrfs_dir_item, location, key); |
| } |
| |
| static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, |
| struct btrfs_dir_item *item, |
| struct btrfs_disk_key *key) |
| { |
| write_eb_member(eb, item, struct btrfs_dir_item, location, key); |
| } |
| |
| /* struct btrfs_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); |
| |
| 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 u8 *btrfs_header_fsid(struct extent_buffer *eb) |
| { |
| unsigned long ptr = offsetof(struct btrfs_header, fsid); |
| return (u8 *)ptr; |
| } |
| |
| static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb) |
| { |
| unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid); |
| return (u8 *)ptr; |
| } |
| |
| static inline u8 *btrfs_super_fsid(struct extent_buffer *eb) |
| { |
| unsigned long ptr = offsetof(struct btrfs_super_block, fsid); |
| return (u8 *)ptr; |
| } |
| |
| static inline u8 *btrfs_header_csum(struct extent_buffer *eb) |
| { |
| unsigned long ptr = offsetof(struct btrfs_header, csum); |
| return (u8 *)ptr; |
| } |
| |
| static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb) |
| { |
| return NULL; |
| } |
| |
| static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb) |
| { |
| return NULL; |
| } |
| |
| static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb) |
| { |
| return NULL; |
| } |
| |
| static inline int btrfs_is_leaf(struct extent_buffer *eb) |
| { |
| return (btrfs_header_level(eb) == 0); |
| } |
| |
| /* struct btrfs_root_item */ |
| BTRFS_SETGET_FUNCS(disk_root_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_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, 32); |
| 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); |
| |
| /* 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_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, 64); |
| BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, |
| total_bytes, 64); |
| BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, |
| bytes_used, 64); |
| BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, |
| sectorsize, 32); |
| BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, |
| nodesize, 32); |
| BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, |
| leafsize, 32); |
| BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, |
| stripesize, 32); |
| BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, |
| root_dir_objectid, 64); |
| BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, |
| num_devices, 64); |
| |
| 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); |
| |
| static inline unsigned long btrfs_file_extent_inline_start(struct |
| btrfs_file_extent_item *e) |
| { |
| unsigned long offset = (unsigned long)e; |
| offset += offsetof(struct btrfs_file_extent_item, disk_bytenr); |
| return offset; |
| } |
| |
| static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) |
| { |
| return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize; |
| } |
| |
| static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, |
| struct btrfs_item *e) |
| { |
| unsigned long offset; |
| offset = offsetof(struct btrfs_file_extent_item, disk_bytenr); |
| return btrfs_item_size(eb, e) - offset; |
| } |
| |
| 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); |
| |
| static inline struct btrfs_root *btrfs_sb(struct super_block *sb) |
| { |
| return sb->s_fs_info; |
| } |
| |
| static inline int btrfs_set_root_name(struct btrfs_root *root, |
| const char *name, int len) |
| { |
| /* if we already have a name just free it */ |
| if (root->name) |
| kfree(root->name); |
| |
| root->name = kmalloc(len+1, GFP_KERNEL); |
| if (!root->name) |
| return -ENOMEM; |
| |
| memcpy(root->name, name, len); |
| root->name[len] ='\0'; |
| |
| return 0; |
| } |
| |
| static inline u32 btrfs_level_size(struct btrfs_root *root, int level) { |
| if (level == 0) |
| return root->leafsize; |
| return root->nodesize; |
| } |
| |
| /* helper function to cast into the data area of the leaf. */ |
| #define btrfs_item_ptr(leaf, slot, type) \ |
| ((type *)(btrfs_leaf_data(leaf) + \ |
| btrfs_item_offset_nr(leaf, slot))) |
| |
| #define btrfs_item_ptr_offset(leaf, slot) \ |
| ((unsigned long)(btrfs_leaf_data(leaf) + \ |
| btrfs_item_offset_nr(leaf, slot))) |
| |
| static inline struct dentry *fdentry(struct file *file) { |
| #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18) |
| return file->f_dentry; |
| #else |
| return file->f_path.dentry; |
| #endif |
| } |
| |
| /* extent-tree.c */ |
| u32 btrfs_count_snapshots_in_path(struct btrfs_root *root, |
| struct btrfs_path *count_path, |
| u64 expected_owner, u64 first_extent); |
| int btrfs_extent_post_op(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root); |
| int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy); |
| struct btrfs_block_group_cache *btrfs_lookup_block_group(struct |
| btrfs_fs_info *info, |
| u64 bytenr); |
| struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root, |
| struct btrfs_block_group_cache |
| *hint, u64 search_start, |
| int data, int owner); |
| int btrfs_inc_root_ref(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, u64 owner_objectid); |
| struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, u32 size, |
| u64 root_objectid, |
| u64 hint, u64 empty_size); |
| struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| u32 blocksize, |
| u64 root_objectid, |
| u64 ref_generation, |
| u64 first_objectid, |
| int level, |
| u64 hint, |
| u64 empty_size); |
| int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, u64 new_size); |
| int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size); |
| int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct btrfs_path *path, u64 bytenr, |
| u64 root_objectid, u64 ref_generation, |
| u64 owner, u64 owner_offset); |
| int btrfs_alloc_extent(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| u64 num_bytes, u64 min_bytes, |
| u64 root_objectid, u64 ref_generation, |
| u64 owner, u64 owner_offset, |
| u64 empty_size, u64 hint_byte, |
| u64 search_end, struct btrfs_key *ins, u64 data); |
| int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| struct extent_buffer *buf); |
| int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root |
| *root, u64 bytenr, u64 num_bytes, |
| u64 root_objectid, u64 ref_generation, |
| u64 owner_objectid, u64 owner_offset, int pin); |
| int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct extent_io_tree *unpin); |
| int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| u64 bytenr, u64 num_bytes, |
| u64 root_objectid, u64 ref_generation, |
| u64 owner, u64 owner_offset); |
| int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root); |
| int btrfs_free_block_groups(struct btrfs_fs_info *info); |
| int btrfs_read_block_groups(struct btrfs_root *root); |
| int btrfs_make_block_group(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, u64 bytes_used, |
| u64 type, u64 chunk_objectid, u64 chunk_offset, |
| u64 size); |
| /* ctree.c */ |
| int btrfs_previous_item(struct btrfs_root *root, |
| struct btrfs_path *path, u64 min_objectid, |
| int type); |
| int btrfs_cow_block(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, struct extent_buffer *buf, |
| struct extent_buffer *parent, int parent_slot, |
| struct extent_buffer **cow_ret); |
| int btrfs_copy_root(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct extent_buffer *buf, |
| struct extent_buffer **cow_ret, u64 new_root_objectid); |
| int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| *root, struct btrfs_path *path, u32 data_size); |
| int btrfs_truncate_item(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct btrfs_path *path, |
| u32 new_size, int from_end); |
| int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
| *root, struct btrfs_key *key, struct btrfs_path *p, int |
| ins_len, int cow); |
| int btrfs_realloc_node(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, struct extent_buffer *parent, |
| int start_slot, int cache_only, u64 *last_ret, |
| struct btrfs_key *progress); |
| void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); |
| struct btrfs_path *btrfs_alloc_path(void); |
| void btrfs_free_path(struct btrfs_path *p); |
| void btrfs_init_path(struct btrfs_path *p); |
| int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| struct btrfs_path *path, int slot, int nr); |
| |
| static inline int btrfs_del_item(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct btrfs_path *path) |
| { |
| return btrfs_del_items(trans, root, path, path->slots[0], 1); |
| } |
| |
| int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| *root, struct btrfs_key *key, void *data, u32 data_size); |
| int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct btrfs_path *path, |
| struct btrfs_key *cpu_key, u32 *data_size, int nr); |
| |
| static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct btrfs_path *path, |
| struct btrfs_key *key, |
| u32 data_size) |
| { |
| return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); |
| } |
| |
| int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
| int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); |
| int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); |
| int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root |
| *root); |
| /* root-item.c */ |
| int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| struct btrfs_key *key); |
| int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root |
| *root, struct btrfs_key *key, struct btrfs_root_item |
| *item); |
| int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root |
| *root, struct btrfs_key *key, struct btrfs_root_item |
| *item); |
| int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct |
| btrfs_root_item *item, struct btrfs_key *key); |
| int btrfs_search_root(struct btrfs_root *root, u64 search_start, |
| u64 *found_objectid); |
| int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid, |
| struct btrfs_root *latest_root); |
| /* dir-item.c */ |
| int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| *root, const char *name, int name_len, u64 dir, |
| struct btrfs_key *location, u8 type); |
| struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct btrfs_path *path, u64 dir, |
| const char *name, int name_len, |
| int mod); |
| struct btrfs_dir_item * |
| btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct btrfs_path *path, u64 dir, |
| u64 objectid, const char *name, int name_len, |
| int mod); |
| struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, |
| struct btrfs_path *path, |
| const char *name, int name_len); |
| int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct btrfs_path *path, |
| struct btrfs_dir_item *di); |
| int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, const char *name, |
| u16 name_len, const void *data, u16 data_len, |
| u64 dir); |
| struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct btrfs_path *path, u64 dir, |
| const char *name, u16 name_len, |
| int mod); |
| /* inode-map.c */ |
| int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, |
| struct btrfs_root *fs_root, |
| u64 dirid, u64 *objectid); |
| int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); |
| |
| /* inode-item.c */ |
| int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| const char *name, int name_len, |
| u64 inode_objectid, u64 ref_objectid); |
| int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| const char *name, int name_len, |
| u64 inode_objectid, u64 ref_objectid); |
| int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct btrfs_path *path, u64 objectid); |
| int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
| *root, struct btrfs_path *path, |
| struct btrfs_key *location, int mod); |
| |
| /* file-item.c */ |
| int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| u64 objectid, u64 pos, u64 disk_offset, |
| u64 disk_num_bytes, |
| u64 num_bytes, u64 offset); |
| int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct btrfs_path *path, u64 objectid, |
| u64 bytenr, int mod); |
| int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, struct inode *inode, |
| struct bio *bio, char *sums); |
| int btrfs_csum_one_bio(struct btrfs_root *root, |
| struct bio *bio, char **sums_ret); |
| struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct btrfs_path *path, |
| u64 objectid, u64 offset, |
| int cow); |
| int btrfs_csum_truncate(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, struct btrfs_path *path, |
| u64 isize); |
| /* inode.c */ |
| int btrfs_merge_bio_hook(struct page *page, unsigned long offset, |
| size_t size, struct bio *bio); |
| |
| static inline void dec_i_blocks(struct inode *inode, u64 dec) |
| { |
| dec = dec >> 9; |
| if (dec <= inode->i_blocks) |
| inode->i_blocks -= dec; |
| else |
| inode->i_blocks = 0; |
| } |
| |
| unsigned long btrfs_force_ra(struct address_space *mapping, |
| struct file_ra_state *ra, struct file *file, |
| pgoff_t offset, pgoff_t last_index); |
| int btrfs_check_free_space(struct btrfs_root *root, u64 num_required, |
| int for_del); |
| int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page); |
| int btrfs_readpage(struct file *file, struct page *page); |
| void btrfs_delete_inode(struct inode *inode); |
| void btrfs_put_inode(struct inode *inode); |
| void btrfs_read_locked_inode(struct inode *inode); |
| int btrfs_write_inode(struct inode *inode, int wait); |
| void btrfs_dirty_inode(struct inode *inode); |
| struct inode *btrfs_alloc_inode(struct super_block *sb); |
| void btrfs_destroy_inode(struct inode *inode); |
| int btrfs_init_cachep(void); |
| void btrfs_destroy_cachep(void); |
| long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
| struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid, |
| struct btrfs_root *root); |
| struct inode *btrfs_ilookup(struct super_block *s, u64 objectid, |
| u64 root_objectid); |
| int btrfs_commit_write(struct file *file, struct page *page, |
| unsigned from, unsigned to); |
| struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, |
| size_t page_offset, u64 start, u64 end, |
| int create); |
| int btrfs_update_inode(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct inode *inode); |
| /* file.c */ |
| int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end); |
| int btrfs_check_file(struct btrfs_root *root, struct inode *inode); |
| extern struct file_operations btrfs_file_operations; |
| int btrfs_drop_extents(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, struct inode *inode, |
| u64 start, u64 end, u64 inline_limit, u64 *hint_block); |
| /* tree-defrag.c */ |
| int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, int cache_only); |
| |
| /* sysfs.c */ |
| int btrfs_init_sysfs(void); |
| void btrfs_exit_sysfs(void); |
| int btrfs_sysfs_add_super(struct btrfs_fs_info *fs); |
| int btrfs_sysfs_add_root(struct btrfs_root *root); |
| void btrfs_sysfs_del_root(struct btrfs_root *root); |
| void btrfs_sysfs_del_super(struct btrfs_fs_info *root); |
| |
| /* xattr.c */ |
| ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); |
| int btrfs_delete_xattrs(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, struct inode *inode); |
| /* super.c */ |
| u64 btrfs_parse_size(char *str); |
| int btrfs_parse_options(char *options, struct btrfs_root *root, |
| char **subvol_name); |
| #endif |