2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
22 #include <linux/version.h>
24 #include <linux/highmem.h>
26 #include <linux/completion.h>
27 #include <linux/backing-dev.h>
28 #include <linux/wait.h>
29 #include <asm/kmap_types.h>
30 #include "extent_io.h"
31 #include "extent_map.h"
32 #include "async-thread.h"
34 struct btrfs_trans_handle;
35 struct btrfs_transaction;
36 extern struct kmem_cache *btrfs_trans_handle_cachep;
37 extern struct kmem_cache *btrfs_transaction_cachep;
38 extern struct kmem_cache *btrfs_bit_radix_cachep;
39 extern struct kmem_cache *btrfs_path_cachep;
40 struct btrfs_ordered_sum;
42 #define BTRFS_MAGIC "_BDRfS_M"
44 #define BTRFS_ACL_NOT_CACHED ((void *)-1)
47 # define BTRFS_MAX_LEVEL 7
49 # define BTRFS_MAX_LEVEL 8
52 /* holds pointers to all of the tree roots */
53 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
55 /* stores information about which extents are in use, and reference counts */
56 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
59 * chunk tree stores translations from logical -> physical block numbering
60 * the super block points to the chunk tree
62 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
65 * stores information about which areas of a given device are in use.
66 * one per device. The tree of tree roots points to the device tree
68 #define BTRFS_DEV_TREE_OBJECTID 4ULL
70 /* one per subvolume, storing files and directories */
71 #define BTRFS_FS_TREE_OBJECTID 5ULL
73 /* directory objectid inside the root tree */
74 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
76 /* orhpan objectid for tracking unlinked/truncated files */
77 #define BTRFS_ORPHAN_OBJECTID -5ULL
79 /* does write ahead logging to speed up fsyncs */
80 #define BTRFS_TREE_LOG_OBJECTID -6ULL
81 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
83 /* for space balancing */
84 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
85 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
87 /* dummy objectid represents multiple objectids */
88 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
91 * All files have objectids in this range.
93 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
94 #define BTRFS_LAST_FREE_OBJECTID -256ULL
95 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
99 * the device items go into the chunk tree. The key is in the form
100 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
102 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
105 * we can actually store much bigger names, but lets not confuse the rest
108 #define BTRFS_NAME_LEN 255
110 /* 32 bytes in various csum fields */
111 #define BTRFS_CSUM_SIZE 32
112 /* four bytes for CRC32 */
113 #define BTRFS_CRC32_SIZE 4
114 #define BTRFS_EMPTY_DIR_SIZE 0
116 #define BTRFS_FT_UNKNOWN 0
117 #define BTRFS_FT_REG_FILE 1
118 #define BTRFS_FT_DIR 2
119 #define BTRFS_FT_CHRDEV 3
120 #define BTRFS_FT_BLKDEV 4
121 #define BTRFS_FT_FIFO 5
122 #define BTRFS_FT_SOCK 6
123 #define BTRFS_FT_SYMLINK 7
124 #define BTRFS_FT_XATTR 8
125 #define BTRFS_FT_MAX 9
128 * the key defines the order in the tree, and so it also defines (optimal)
129 * block layout. objectid corresonds to the inode number. The flags
130 * tells us things about the object, and is a kind of stream selector.
131 * so for a given inode, keys with flags of 1 might refer to the inode
132 * data, flags of 2 may point to file data in the btree and flags == 3
133 * may point to extents.
135 * offset is the starting byte offset for this key in the stream.
137 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
138 * in cpu native order. Otherwise they are identical and their sizes
139 * should be the same (ie both packed)
141 struct btrfs_disk_key {
145 } __attribute__ ((__packed__));
151 } __attribute__ ((__packed__));
153 struct btrfs_mapping_tree {
154 struct extent_map_tree map_tree;
157 #define BTRFS_UUID_SIZE 16
158 struct btrfs_dev_item {
159 /* the internal btrfs device id */
162 /* size of the device */
168 /* optimal io alignment for this device */
171 /* optimal io width for this device */
174 /* minimal io size for this device */
177 /* type and info about this device */
180 /* grouping information for allocation decisions */
183 /* seek speed 0-100 where 100 is fastest */
186 /* bandwidth 0-100 where 100 is fastest */
189 /* btrfs generated uuid for this device */
190 u8 uuid[BTRFS_UUID_SIZE];
191 } __attribute__ ((__packed__));
193 struct btrfs_stripe {
196 u8 dev_uuid[BTRFS_UUID_SIZE];
197 } __attribute__ ((__packed__));
200 /* size of this chunk in bytes */
203 /* objectid of the root referencing this chunk */
209 /* optimal io alignment for this chunk */
212 /* optimal io width for this chunk */
215 /* minimal io size for this chunk */
218 /* 2^16 stripes is quite a lot, a second limit is the size of a single
223 /* sub stripes only matter for raid10 */
225 struct btrfs_stripe stripe;
226 /* additional stripes go here */
227 } __attribute__ ((__packed__));
229 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
231 BUG_ON(num_stripes == 0);
232 return sizeof(struct btrfs_chunk) +
233 sizeof(struct btrfs_stripe) * (num_stripes - 1);
236 #define BTRFS_FSID_SIZE 16
237 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
240 * every tree block (leaf or node) starts with this header.
242 struct btrfs_header {
243 /* these first four must match the super block */
244 u8 csum[BTRFS_CSUM_SIZE];
245 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
246 __le64 bytenr; /* which block this node is supposed to live in */
249 /* allowed to be different from the super from here on down */
250 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
255 } __attribute__ ((__packed__));
257 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
258 sizeof(struct btrfs_header)) / \
259 sizeof(struct btrfs_key_ptr))
260 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
261 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
262 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
263 sizeof(struct btrfs_item) - \
264 sizeof(struct btrfs_file_extent_item))
268 * this is a very generous portion of the super block, giving us
269 * room to translate 14 chunks with 3 stripes each.
271 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
272 #define BTRFS_LABEL_SIZE 256
275 * the super block basically lists the main trees of the FS
276 * it currently lacks any block count etc etc
278 struct btrfs_super_block {
279 u8 csum[BTRFS_CSUM_SIZE];
280 /* the first 4 fields must match struct btrfs_header */
281 u8 fsid[16]; /* FS specific uuid */
282 __le64 bytenr; /* this block number */
285 /* allowed to be different from the btrfs_header from here own down */
293 __le64 root_dir_objectid;
299 __le32 sys_chunk_array_size;
300 __le64 chunk_root_generation;
304 struct btrfs_dev_item dev_item;
305 char label[BTRFS_LABEL_SIZE];
306 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
307 } __attribute__ ((__packed__));
310 * A leaf is full of items. offset and size tell us where to find
311 * the item in the leaf (relative to the start of the data area)
314 struct btrfs_disk_key key;
317 } __attribute__ ((__packed__));
320 * leaves have an item area and a data area:
321 * [item0, item1....itemN] [free space] [dataN...data1, data0]
323 * The data is separate from the items to get the keys closer together
327 struct btrfs_header header;
328 struct btrfs_item items[];
329 } __attribute__ ((__packed__));
332 * all non-leaf blocks are nodes, they hold only keys and pointers to
335 struct btrfs_key_ptr {
336 struct btrfs_disk_key key;
339 } __attribute__ ((__packed__));
342 struct btrfs_header header;
343 struct btrfs_key_ptr ptrs[];
344 } __attribute__ ((__packed__));
347 * btrfs_paths remember the path taken from the root down to the leaf.
348 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
349 * to any other levels that are present.
351 * The slots array records the index of the item or block pointer
352 * used while walking the tree.
355 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
356 int slots[BTRFS_MAX_LEVEL];
357 /* if there is real range locking, this locks field will change */
358 int locks[BTRFS_MAX_LEVEL];
360 /* keep some upper locks as we walk down */
367 * items in the extent btree are used to record the objectid of the
368 * owner of the block and the number of references
370 struct btrfs_extent_item {
372 } __attribute__ ((__packed__));
374 struct btrfs_extent_ref {
379 } __attribute__ ((__packed__));
381 /* dev extents record free space on individual devices. The owner
382 * field points back to the chunk allocation mapping tree that allocated
383 * the extent. The chunk tree uuid field is a way to double check the owner
385 struct btrfs_dev_extent {
387 __le64 chunk_objectid;
390 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
391 } __attribute__ ((__packed__));
393 struct btrfs_inode_ref {
397 } __attribute__ ((__packed__));
399 struct btrfs_timespec {
402 } __attribute__ ((__packed__));
405 BTRFS_COMPRESS_NONE = 0,
406 BTRFS_COMPRESS_ZLIB = 1,
407 BTRFS_COMPRESS_LAST = 2,
408 } btrfs_compression_type;
410 /* we don't understand any encryption methods right now */
412 BTRFS_ENCRYPTION_NONE = 0,
413 BTRFS_ENCRYPTION_LAST = 1,
414 } btrfs_encryption_type;
416 struct btrfs_inode_item {
417 /* nfs style generation number */
419 /* transid that last touched this inode */
432 struct btrfs_timespec atime;
433 struct btrfs_timespec ctime;
434 struct btrfs_timespec mtime;
435 struct btrfs_timespec otime;
436 } __attribute__ ((__packed__));
438 struct btrfs_dir_log_item {
440 } __attribute__ ((__packed__));
442 struct btrfs_dir_item {
443 struct btrfs_disk_key location;
448 } __attribute__ ((__packed__));
450 struct btrfs_root_item {
451 struct btrfs_inode_item inode;
457 __le64 last_snapshot;
460 struct btrfs_disk_key drop_progress;
463 } __attribute__ ((__packed__));
465 #define BTRFS_FILE_EXTENT_INLINE 0
466 #define BTRFS_FILE_EXTENT_REG 1
467 #define BTRFS_FILE_EXTENT_PREALLOC 2
469 struct btrfs_file_extent_item {
471 * transaction id that created this extent
475 * max number of bytes to hold this extent in ram
476 * when we split a compressed extent we can't know how big
477 * each of the resulting pieces will be. So, this is
478 * an upper limit on the size of the extent in ram instead of
484 * 32 bits for the various ways we might encode the data,
485 * including compression and encryption. If any of these
486 * are set to something a given disk format doesn't understand
487 * it is treated like an incompat flag for reading and writing,
492 __le16 other_encoding; /* spare for later use */
494 /* are we inline data or a real extent? */
498 * disk space consumed by the extent, checksum blocks are included
502 __le64 disk_num_bytes;
504 * the logical offset in file blocks (no csums)
505 * this extent record is for. This allows a file extent to point
506 * into the middle of an existing extent on disk, sharing it
507 * between two snapshots (useful if some bytes in the middle of the
508 * extent have changed
512 * the logical number of file blocks (no csums included). This
513 * always reflects the size uncompressed and without encoding.
517 } __attribute__ ((__packed__));
519 struct btrfs_csum_item {
521 } __attribute__ ((__packed__));
523 /* different types of block groups (and chunks) */
524 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
525 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
526 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
527 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
528 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
529 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
530 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
532 struct btrfs_block_group_item {
534 __le64 chunk_objectid;
536 } __attribute__ ((__packed__));
538 struct btrfs_space_info {
546 struct list_head list;
548 /* for block groups in our same type */
549 struct list_head block_groups;
551 struct rw_semaphore groups_sem;
554 struct btrfs_free_space {
555 struct rb_node bytes_index;
556 struct rb_node offset_index;
561 struct btrfs_block_group_cache {
562 struct btrfs_key key;
563 struct btrfs_block_group_item item;
565 struct mutex alloc_mutex;
573 struct btrfs_space_info *space_info;
575 /* free space cache stuff */
576 struct rb_root free_space_bytes;
577 struct rb_root free_space_offset;
579 /* block group cache stuff */
580 struct rb_node cache_node;
582 /* for block groups in the same raid type */
583 struct list_head list;
586 struct btrfs_leaf_ref_tree {
588 struct list_head list;
593 struct btrfs_fs_devices;
594 struct btrfs_fs_info {
595 u8 fsid[BTRFS_FSID_SIZE];
596 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
597 struct btrfs_root *extent_root;
598 struct btrfs_root *tree_root;
599 struct btrfs_root *chunk_root;
600 struct btrfs_root *dev_root;
602 /* the log root tree is a directory of all the other log roots */
603 struct btrfs_root *log_root_tree;
604 struct radix_tree_root fs_roots_radix;
606 /* block group cache stuff */
607 spinlock_t block_group_cache_lock;
608 struct rb_root block_group_cache_tree;
610 struct extent_io_tree pinned_extents;
611 struct extent_io_tree pending_del;
612 struct extent_io_tree extent_ins;
614 /* logical->physical extent mapping */
615 struct btrfs_mapping_tree mapping_tree;
618 u64 last_trans_committed;
619 u64 last_trans_new_blockgroup;
620 u64 open_ioctl_trans;
621 unsigned long mount_opt;
625 struct btrfs_transaction *running_transaction;
626 wait_queue_head_t transaction_throttle;
627 wait_queue_head_t transaction_wait;
628 wait_queue_head_t async_submit_wait;
630 wait_queue_head_t tree_log_wait;
632 struct btrfs_super_block super_copy;
633 struct btrfs_super_block super_for_commit;
634 struct block_device *__bdev;
635 struct super_block *sb;
636 struct inode *btree_inode;
637 struct backing_dev_info bdi;
638 spinlock_t hash_lock;
639 struct mutex trans_mutex;
640 struct mutex tree_log_mutex;
641 struct mutex transaction_kthread_mutex;
642 struct mutex cleaner_mutex;
643 struct mutex extent_ins_mutex;
644 struct mutex pinned_mutex;
645 struct mutex chunk_mutex;
646 struct mutex drop_mutex;
647 struct mutex volume_mutex;
648 struct mutex tree_reloc_mutex;
649 struct list_head trans_list;
650 struct list_head hashers;
651 struct list_head dead_roots;
653 atomic_t nr_async_submits;
654 atomic_t async_submit_draining;
655 atomic_t nr_async_bios;
656 atomic_t tree_log_writers;
657 atomic_t tree_log_commit;
658 unsigned long tree_log_batch;
659 u64 tree_log_transid;
662 * this is used by the balancing code to wait for all the pending
665 spinlock_t ordered_extent_lock;
666 struct list_head ordered_extents;
667 struct list_head delalloc_inodes;
670 * there is a pool of worker threads for checksumming during writes
671 * and a pool for checksumming after reads. This is because readers
672 * can run with FS locks held, and the writers may be waiting for
673 * those locks. We don't want ordering in the pending list to cause
674 * deadlocks, and so the two are serviced separately.
676 * A third pool does submit_bio to avoid deadlocking with the other
679 struct btrfs_workers workers;
680 struct btrfs_workers endio_workers;
681 struct btrfs_workers endio_write_workers;
682 struct btrfs_workers submit_workers;
684 * fixup workers take dirty pages that didn't properly go through
685 * the cow mechanism and make them safe to write. It happens
686 * for the sys_munmap function call path
688 struct btrfs_workers fixup_workers;
689 struct task_struct *transaction_kthread;
690 struct task_struct *cleaner_kthread;
691 int thread_pool_size;
693 /* tree relocation relocated fields */
694 struct list_head dead_reloc_roots;
695 struct btrfs_leaf_ref_tree reloc_ref_tree;
696 struct btrfs_leaf_ref_tree shared_ref_tree;
698 struct kobject super_kobj;
699 struct completion kobj_unregister;
702 int log_root_recovering;
704 atomic_t throttle_gen;
707 struct list_head dirty_cowonly_roots;
709 struct btrfs_fs_devices *fs_devices;
710 struct list_head space_info;
711 spinlock_t delalloc_lock;
712 spinlock_t new_trans_lock;
717 spinlock_t ref_cache_lock;
718 u64 total_ref_cache_size;
720 u64 avail_data_alloc_bits;
721 u64 avail_metadata_alloc_bits;
722 u64 avail_system_alloc_bits;
723 u64 data_alloc_profile;
724 u64 metadata_alloc_profile;
725 u64 system_alloc_profile;
731 * in ram representation of the tree. extent_root is used for all allocations
732 * and for the extent tree extent_root root.
734 struct btrfs_dirty_root;
736 struct extent_buffer *node;
738 /* the node lock is held while changing the node pointer */
739 spinlock_t node_lock;
741 struct extent_buffer *commit_root;
742 struct btrfs_leaf_ref_tree *ref_tree;
743 struct btrfs_leaf_ref_tree ref_tree_struct;
744 struct btrfs_dirty_root *dirty_root;
745 struct btrfs_root *log_root;
746 struct btrfs_root *reloc_root;
748 struct btrfs_root_item root_item;
749 struct btrfs_key root_key;
750 struct btrfs_fs_info *fs_info;
752 struct extent_io_tree dirty_log_pages;
754 struct kobject root_kobj;
755 struct completion kobj_unregister;
756 struct mutex objectid_mutex;
757 struct mutex log_mutex;
762 /* data allocations are done in sectorsize units */
765 /* node allocations are done in nodesize units */
768 /* leaf allocations are done in leafsize units */
775 u64 last_inode_alloc;
778 u64 defrag_trans_start;
779 struct btrfs_key defrag_progress;
780 struct btrfs_key defrag_max;
786 /* the dirty list is only used by non-reference counted roots */
787 struct list_head dirty_list;
789 spinlock_t list_lock;
790 struct list_head dead_list;
791 struct list_head orphan_list;
796 * inode items have the data typically returned from stat and store other
797 * info about object characteristics. There is one for every file and dir in
800 #define BTRFS_INODE_ITEM_KEY 1
801 #define BTRFS_INODE_REF_KEY 2
802 #define BTRFS_XATTR_ITEM_KEY 8
803 #define BTRFS_ORPHAN_ITEM_KEY 9
804 /* reserve 2-15 close to the inode for later flexibility */
807 * dir items are the name -> inode pointers in a directory. There is one
808 * for every name in a directory.
810 #define BTRFS_DIR_LOG_ITEM_KEY 14
811 #define BTRFS_DIR_LOG_INDEX_KEY 15
812 #define BTRFS_DIR_ITEM_KEY 16
813 #define BTRFS_DIR_INDEX_KEY 17
815 * extent data is for file data
817 #define BTRFS_EXTENT_DATA_KEY 18
819 * csum items have the checksums for data in the extents
821 #define BTRFS_CSUM_ITEM_KEY 19
824 /* reserve 21-31 for other file/dir stuff */
827 * root items point to tree roots. There are typically in the root
828 * tree used by the super block to find all the other trees
830 #define BTRFS_ROOT_ITEM_KEY 32
832 * extent items are in the extent map tree. These record which blocks
833 * are used, and how many references there are to each block
835 #define BTRFS_EXTENT_ITEM_KEY 33
836 #define BTRFS_EXTENT_REF_KEY 34
839 * block groups give us hints into the extent allocation trees. Which
840 * blocks are free etc etc
842 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
844 #define BTRFS_DEV_EXTENT_KEY 75
845 #define BTRFS_DEV_ITEM_KEY 76
846 #define BTRFS_CHUNK_ITEM_KEY 77
849 * string items are for debugging. They just store a short string of
852 #define BTRFS_STRING_ITEM_KEY 253
854 #define BTRFS_MOUNT_NODATASUM (1 << 0)
855 #define BTRFS_MOUNT_NODATACOW (1 << 1)
856 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
857 #define BTRFS_MOUNT_SSD (1 << 3)
858 #define BTRFS_MOUNT_DEGRADED (1 << 4)
859 #define BTRFS_MOUNT_COMPRESS (1 << 5)
861 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
862 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
863 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
868 #define BTRFS_INODE_NODATASUM (1 << 0)
869 #define BTRFS_INODE_NODATACOW (1 << 1)
870 #define BTRFS_INODE_READONLY (1 << 2)
871 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
872 #define BTRFS_INODE_PREALLOC (1 << 4)
873 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
875 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
877 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
879 /* some macros to generate set/get funcs for the struct fields. This
880 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
883 #define le8_to_cpu(v) (v)
884 #define cpu_to_le8(v) (v)
887 #define read_eb_member(eb, ptr, type, member, result) ( \
888 read_extent_buffer(eb, (char *)(result), \
889 ((unsigned long)(ptr)) + \
890 offsetof(type, member), \
891 sizeof(((type *)0)->member)))
893 #define write_eb_member(eb, ptr, type, member, result) ( \
894 write_extent_buffer(eb, (char *)(result), \
895 ((unsigned long)(ptr)) + \
896 offsetof(type, member), \
897 sizeof(((type *)0)->member)))
899 #ifndef BTRFS_SETGET_FUNCS
900 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
901 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
902 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
905 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
906 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
908 type *p = kmap_atomic(eb->first_page, KM_USER0); \
909 u##bits res = le##bits##_to_cpu(p->member); \
910 kunmap_atomic(p, KM_USER0); \
913 static inline void btrfs_set_##name(struct extent_buffer *eb, \
916 type *p = kmap_atomic(eb->first_page, KM_USER0); \
917 p->member = cpu_to_le##bits(val); \
918 kunmap_atomic(p, KM_USER0); \
921 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
922 static inline u##bits btrfs_##name(type *s) \
924 return le##bits##_to_cpu(s->member); \
926 static inline void btrfs_set_##name(type *s, u##bits val) \
928 s->member = cpu_to_le##bits(val); \
931 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
932 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
933 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
934 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
935 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
936 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
937 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
938 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
939 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
940 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
942 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
943 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
945 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
947 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
949 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
951 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
953 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
954 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
956 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
958 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
961 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
963 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
966 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
967 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
968 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
969 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
970 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
971 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
972 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
973 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
974 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
975 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
976 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
978 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
980 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
983 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
984 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
985 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
987 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
989 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
991 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
993 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
994 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
996 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
998 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
999 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1001 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1004 unsigned long offset = (unsigned long)c;
1005 offset += offsetof(struct btrfs_chunk, stripe);
1006 offset += nr * sizeof(struct btrfs_stripe);
1007 return (struct btrfs_stripe *)offset;
1010 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1012 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1015 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1016 struct btrfs_chunk *c, int nr)
1018 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1021 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1022 struct btrfs_chunk *c, int nr,
1025 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1028 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1029 struct btrfs_chunk *c, int nr)
1031 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1034 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1035 struct btrfs_chunk *c, int nr,
1038 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1041 /* struct btrfs_block_group_item */
1042 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1044 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1046 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1047 struct btrfs_block_group_item, chunk_objectid, 64);
1049 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1050 struct btrfs_block_group_item, chunk_objectid, 64);
1051 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1052 struct btrfs_block_group_item, flags, 64);
1053 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1054 struct btrfs_block_group_item, flags, 64);
1056 /* struct btrfs_inode_ref */
1057 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1058 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1060 /* struct btrfs_inode_item */
1061 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1062 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1063 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1064 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1065 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1066 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1067 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1068 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1069 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1070 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1071 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
1072 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
1075 static inline struct btrfs_timespec *
1076 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1078 unsigned long ptr = (unsigned long)inode_item;
1079 ptr += offsetof(struct btrfs_inode_item, atime);
1080 return (struct btrfs_timespec *)ptr;
1083 static inline struct btrfs_timespec *
1084 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1086 unsigned long ptr = (unsigned long)inode_item;
1087 ptr += offsetof(struct btrfs_inode_item, mtime);
1088 return (struct btrfs_timespec *)ptr;
1091 static inline struct btrfs_timespec *
1092 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1094 unsigned long ptr = (unsigned long)inode_item;
1095 ptr += offsetof(struct btrfs_inode_item, ctime);
1096 return (struct btrfs_timespec *)ptr;
1099 static inline struct btrfs_timespec *
1100 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1102 unsigned long ptr = (unsigned long)inode_item;
1103 ptr += offsetof(struct btrfs_inode_item, otime);
1104 return (struct btrfs_timespec *)ptr;
1107 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1108 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1110 /* struct btrfs_dev_extent */
1111 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1113 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1114 chunk_objectid, 64);
1115 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1117 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1119 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1121 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1122 return (u8 *)((unsigned long)dev + ptr);
1125 /* struct btrfs_extent_ref */
1126 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1127 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1128 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1129 BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
1131 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1132 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1134 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1136 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
1139 /* struct btrfs_extent_item */
1140 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1141 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1144 /* struct btrfs_node */
1145 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1146 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1148 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1151 ptr = offsetof(struct btrfs_node, ptrs) +
1152 sizeof(struct btrfs_key_ptr) * nr;
1153 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1156 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1160 ptr = offsetof(struct btrfs_node, ptrs) +
1161 sizeof(struct btrfs_key_ptr) * nr;
1162 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1165 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1168 ptr = offsetof(struct btrfs_node, ptrs) +
1169 sizeof(struct btrfs_key_ptr) * nr;
1170 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1173 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1177 ptr = offsetof(struct btrfs_node, ptrs) +
1178 sizeof(struct btrfs_key_ptr) * nr;
1179 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1182 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1184 return offsetof(struct btrfs_node, ptrs) +
1185 sizeof(struct btrfs_key_ptr) * nr;
1188 void btrfs_node_key(struct extent_buffer *eb,
1189 struct btrfs_disk_key *disk_key, int nr);
1191 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1192 struct btrfs_disk_key *disk_key, int nr)
1195 ptr = btrfs_node_key_ptr_offset(nr);
1196 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1197 struct btrfs_key_ptr, key, disk_key);
1200 /* struct btrfs_item */
1201 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1202 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1204 static inline unsigned long btrfs_item_nr_offset(int nr)
1206 return offsetof(struct btrfs_leaf, items) +
1207 sizeof(struct btrfs_item) * nr;
1210 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1213 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1216 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1217 struct btrfs_item *item)
1219 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1222 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1224 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1227 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1229 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1232 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1234 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1237 static inline void btrfs_item_key(struct extent_buffer *eb,
1238 struct btrfs_disk_key *disk_key, int nr)
1240 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1241 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1244 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1245 struct btrfs_disk_key *disk_key, int nr)
1247 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1248 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1251 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1253 /* struct btrfs_dir_item */
1254 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1255 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1256 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1257 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1259 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1260 struct btrfs_dir_item *item,
1261 struct btrfs_disk_key *key)
1263 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1266 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1267 struct btrfs_dir_item *item,
1268 struct btrfs_disk_key *key)
1270 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1273 /* struct btrfs_disk_key */
1274 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1276 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1277 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1279 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1280 struct btrfs_disk_key *disk)
1282 cpu->offset = le64_to_cpu(disk->offset);
1283 cpu->type = disk->type;
1284 cpu->objectid = le64_to_cpu(disk->objectid);
1287 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1288 struct btrfs_key *cpu)
1290 disk->offset = cpu_to_le64(cpu->offset);
1291 disk->type = cpu->type;
1292 disk->objectid = cpu_to_le64(cpu->objectid);
1295 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1296 struct btrfs_key *key, int nr)
1298 struct btrfs_disk_key disk_key;
1299 btrfs_node_key(eb, &disk_key, nr);
1300 btrfs_disk_key_to_cpu(key, &disk_key);
1303 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1304 struct btrfs_key *key, int nr)
1306 struct btrfs_disk_key disk_key;
1307 btrfs_item_key(eb, &disk_key, nr);
1308 btrfs_disk_key_to_cpu(key, &disk_key);
1311 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1312 struct btrfs_dir_item *item,
1313 struct btrfs_key *key)
1315 struct btrfs_disk_key disk_key;
1316 btrfs_dir_item_key(eb, item, &disk_key);
1317 btrfs_disk_key_to_cpu(key, &disk_key);
1321 static inline u8 btrfs_key_type(struct btrfs_key *key)
1326 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1331 /* struct btrfs_header */
1332 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1333 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1335 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1336 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1337 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1338 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1340 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1342 return (btrfs_header_flags(eb) & flag) == flag;
1345 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1347 u64 flags = btrfs_header_flags(eb);
1348 btrfs_set_header_flags(eb, flags | flag);
1349 return (flags & flag) == flag;
1352 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1354 u64 flags = btrfs_header_flags(eb);
1355 btrfs_set_header_flags(eb, flags & ~flag);
1356 return (flags & flag) == flag;
1359 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1361 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1365 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1367 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1371 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1373 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1377 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1379 unsigned long ptr = offsetof(struct btrfs_header, csum);
1383 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1388 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1393 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1398 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1400 return (btrfs_header_level(eb) == 0);
1403 /* struct btrfs_root_item */
1404 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1406 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1407 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1408 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1410 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1412 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1413 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1414 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1415 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1416 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1417 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1418 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1419 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1422 /* struct btrfs_super_block */
1423 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1424 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1425 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1427 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1428 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1429 struct btrfs_super_block, sys_chunk_array_size, 32);
1430 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1431 struct btrfs_super_block, chunk_root_generation, 64);
1432 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1434 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1436 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1437 chunk_root_level, 8);
1438 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1440 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1442 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1444 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1446 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1448 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1450 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1452 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1454 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1455 root_dir_objectid, 64);
1456 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1459 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1461 return offsetof(struct btrfs_leaf, items);
1464 /* struct btrfs_file_extent_item */
1465 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1467 static inline unsigned long btrfs_file_extent_inline_start(struct
1468 btrfs_file_extent_item *e)
1470 unsigned long offset = (unsigned long)e;
1471 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1475 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1477 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1480 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1482 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1484 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1485 disk_num_bytes, 64);
1486 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1488 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1490 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1492 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1494 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1496 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1497 other_encoding, 16);
1499 /* this returns the number of file bytes represented by the inline item.
1500 * If an item is compressed, this is the uncompressed size
1502 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1503 struct btrfs_file_extent_item *e)
1505 return btrfs_file_extent_ram_bytes(eb, e);
1509 * this returns the number of bytes used by the item on disk, minus the
1510 * size of any extent headers. If a file is compressed on disk, this is
1511 * the compressed size
1513 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1514 struct btrfs_item *e)
1516 unsigned long offset;
1517 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1518 return btrfs_item_size(eb, e) - offset;
1521 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1523 return sb->s_fs_info;
1526 static inline int btrfs_set_root_name(struct btrfs_root *root,
1527 const char *name, int len)
1529 /* if we already have a name just free it */
1533 root->name = kmalloc(len+1, GFP_KERNEL);
1537 memcpy(root->name, name, len);
1538 root->name[len] ='\0';
1543 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1545 return root->leafsize;
1546 return root->nodesize;
1549 /* helper function to cast into the data area of the leaf. */
1550 #define btrfs_item_ptr(leaf, slot, type) \
1551 ((type *)(btrfs_leaf_data(leaf) + \
1552 btrfs_item_offset_nr(leaf, slot)))
1554 #define btrfs_item_ptr_offset(leaf, slot) \
1555 ((unsigned long)(btrfs_leaf_data(leaf) + \
1556 btrfs_item_offset_nr(leaf, slot)))
1558 static inline struct dentry *fdentry(struct file *file)
1560 return file->f_path.dentry;
1564 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
1565 int btrfs_lookup_extent_ref(struct btrfs_trans_handle *trans,
1566 struct btrfs_root *root, u64 bytenr,
1567 u64 num_bytes, u32 *refs);
1568 int btrfs_update_pinned_extents(struct btrfs_root *root,
1569 u64 bytenr, u64 num, int pin);
1570 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1571 struct btrfs_root *root, struct extent_buffer *leaf);
1572 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
1573 struct btrfs_root *root, u64 bytenr);
1574 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1575 struct btrfs_root *root);
1576 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1577 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1578 btrfs_fs_info *info,
1580 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1581 struct btrfs_block_group_cache
1582 *hint, u64 search_start,
1583 int data, int owner);
1584 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1585 struct btrfs_root *root,
1586 u32 blocksize, u64 parent,
1592 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1593 struct btrfs_root *root,
1594 u64 bytenr, u32 blocksize);
1595 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1596 struct btrfs_root *root,
1597 u64 num_bytes, u64 parent, u64 min_bytes,
1598 u64 root_objectid, u64 ref_generation,
1599 u64 owner, u64 empty_size, u64 hint_byte,
1600 u64 search_end, struct btrfs_key *ins, u64 data);
1601 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1602 struct btrfs_root *root, u64 parent,
1603 u64 root_objectid, u64 ref_generation,
1604 u64 owner, struct btrfs_key *ins);
1605 int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
1606 struct btrfs_root *root, u64 parent,
1607 u64 root_objectid, u64 ref_generation,
1608 u64 owner, struct btrfs_key *ins);
1609 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1610 struct btrfs_root *root,
1611 u64 num_bytes, u64 min_alloc_size,
1612 u64 empty_size, u64 hint_byte,
1613 u64 search_end, struct btrfs_key *ins,
1615 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1616 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1618 int btrfs_cache_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1619 struct extent_buffer *buf, u32 nr_extents);
1620 int btrfs_update_ref(struct btrfs_trans_handle *trans,
1621 struct btrfs_root *root, struct extent_buffer *orig_buf,
1622 struct extent_buffer *buf, int start_slot, int nr);
1623 int btrfs_free_extent(struct btrfs_trans_handle *trans,
1624 struct btrfs_root *root,
1625 u64 bytenr, u64 num_bytes, u64 parent,
1626 u64 root_objectid, u64 ref_generation,
1627 u64 owner_objectid, int pin);
1628 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
1629 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1630 struct btrfs_root *root,
1631 struct extent_io_tree *unpin);
1632 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1633 struct btrfs_root *root,
1634 u64 bytenr, u64 num_bytes, u64 parent,
1635 u64 root_objectid, u64 ref_generation,
1636 u64 owner_objectid);
1637 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1638 struct btrfs_root *root, u64 bytenr,
1639 u64 orig_parent, u64 parent,
1640 u64 root_objectid, u64 ref_generation,
1641 u64 owner_objectid);
1642 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1643 struct btrfs_root *root);
1644 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1645 int btrfs_read_block_groups(struct btrfs_root *root);
1646 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1647 struct btrfs_root *root, u64 bytes_used,
1648 u64 type, u64 chunk_objectid, u64 chunk_offset,
1650 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
1651 struct btrfs_root *root, u64 group_start);
1652 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
1653 int btrfs_free_reloc_root(struct btrfs_trans_handle *trans,
1654 struct btrfs_root *root);
1655 int btrfs_drop_dead_reloc_roots(struct btrfs_root *root);
1656 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle *trans,
1657 struct btrfs_root *root,
1658 struct extent_buffer *buf, u64 orig_start);
1659 int btrfs_add_dead_reloc_root(struct btrfs_root *root);
1660 int btrfs_cleanup_reloc_trees(struct btrfs_root *root);
1662 int btrfs_previous_item(struct btrfs_root *root,
1663 struct btrfs_path *path, u64 min_objectid,
1665 int btrfs_merge_path(struct btrfs_trans_handle *trans,
1666 struct btrfs_root *root,
1667 struct btrfs_key *node_keys,
1668 u64 *nodes, int lowest_level);
1669 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1670 struct btrfs_root *root, struct btrfs_path *path,
1671 struct btrfs_key *new_key);
1672 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1673 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1674 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1675 struct btrfs_key *key, int lowest_level,
1676 int cache_only, u64 min_trans);
1677 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1678 struct btrfs_key *max_key,
1679 struct btrfs_path *path, int cache_only,
1681 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1682 struct btrfs_root *root, struct extent_buffer *buf,
1683 struct extent_buffer *parent, int parent_slot,
1684 struct extent_buffer **cow_ret, u64 prealloc_dest);
1685 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1686 struct btrfs_root *root,
1687 struct extent_buffer *buf,
1688 struct extent_buffer **cow_ret, u64 new_root_objectid);
1689 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1690 *root, struct btrfs_path *path, u32 data_size);
1691 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1692 struct btrfs_root *root,
1693 struct btrfs_path *path,
1694 u32 new_size, int from_end);
1695 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1696 *root, struct btrfs_key *key, struct btrfs_path *p, int
1698 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1699 struct btrfs_root *root, struct extent_buffer *parent,
1700 int start_slot, int cache_only, u64 *last_ret,
1701 struct btrfs_key *progress);
1702 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1703 struct btrfs_path *btrfs_alloc_path(void);
1704 void btrfs_free_path(struct btrfs_path *p);
1705 void btrfs_init_path(struct btrfs_path *p);
1706 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1707 struct btrfs_path *path, int slot, int nr);
1708 int btrfs_del_leaf(struct btrfs_trans_handle *trans,
1709 struct btrfs_root *root,
1710 struct btrfs_path *path, u64 bytenr);
1711 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1712 struct btrfs_root *root,
1713 struct btrfs_path *path)
1715 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1718 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1719 *root, struct btrfs_key *key, void *data, u32 data_size);
1720 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1721 struct btrfs_root *root,
1722 struct btrfs_path *path,
1723 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1725 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1726 struct btrfs_root *root,
1727 struct btrfs_path *path,
1728 struct btrfs_key *key,
1731 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1734 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1735 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1736 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1737 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1739 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
1740 struct btrfs_root *root,
1741 struct extent_buffer *node,
1742 struct extent_buffer *parent);
1744 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1745 struct btrfs_key *key);
1746 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1747 *root, struct btrfs_key *key, struct btrfs_root_item
1749 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1750 *root, struct btrfs_key *key, struct btrfs_root_item
1752 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1753 btrfs_root_item *item, struct btrfs_key *key);
1754 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1755 u64 *found_objectid);
1756 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1757 struct btrfs_root *latest_root);
1759 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1760 *root, const char *name, int name_len, u64 dir,
1761 struct btrfs_key *location, u8 type, u64 index);
1762 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1763 struct btrfs_root *root,
1764 struct btrfs_path *path, u64 dir,
1765 const char *name, int name_len,
1767 struct btrfs_dir_item *
1768 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1769 struct btrfs_root *root,
1770 struct btrfs_path *path, u64 dir,
1771 u64 objectid, const char *name, int name_len,
1773 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1774 struct btrfs_path *path,
1775 const char *name, int name_len);
1776 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1777 struct btrfs_root *root,
1778 struct btrfs_path *path,
1779 struct btrfs_dir_item *di);
1780 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1781 struct btrfs_root *root, const char *name,
1782 u16 name_len, const void *data, u16 data_len,
1784 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1785 struct btrfs_root *root,
1786 struct btrfs_path *path, u64 dir,
1787 const char *name, u16 name_len,
1791 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
1792 struct btrfs_root *root, u64 offset);
1793 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
1794 struct btrfs_root *root, u64 offset);
1797 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1798 struct btrfs_root *fs_root,
1799 u64 dirid, u64 *objectid);
1800 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1803 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1804 struct btrfs_root *root,
1805 const char *name, int name_len,
1806 u64 inode_objectid, u64 ref_objectid, u64 index);
1807 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1808 struct btrfs_root *root,
1809 const char *name, int name_len,
1810 u64 inode_objectid, u64 ref_objectid, u64 *index);
1811 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1812 struct btrfs_root *root,
1813 struct btrfs_path *path, u64 objectid);
1814 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1815 *root, struct btrfs_path *path,
1816 struct btrfs_key *location, int mod);
1819 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
1821 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1822 struct btrfs_root *root,
1823 u64 objectid, u64 pos,
1824 u64 disk_offset, u64 disk_num_bytes,
1825 u64 num_bytes, u64 offset, u64 ram_bytes,
1826 u8 compression, u8 encryption, u16 other_encoding);
1827 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1828 struct btrfs_root *root,
1829 struct btrfs_path *path, u64 objectid,
1830 u64 bytenr, int mod);
1831 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1832 struct btrfs_root *root, struct inode *inode,
1833 struct btrfs_ordered_sum *sums);
1834 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
1836 int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
1837 u64 start, unsigned long len);
1838 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1839 struct btrfs_root *root,
1840 struct btrfs_path *path,
1841 u64 objectid, u64 offset,
1843 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1844 struct btrfs_root *root, struct btrfs_path *path,
1848 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1849 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
1850 #define ClearPageChecked ClearPageFsMisc
1851 #define SetPageChecked SetPageFsMisc
1852 #define PageChecked PageFsMisc
1855 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
1856 struct btrfs_root *root,
1857 struct inode *dir, struct inode *inode,
1858 const char *name, int name_len);
1859 int btrfs_add_link(struct btrfs_trans_handle *trans,
1860 struct inode *parent_inode, struct inode *inode,
1861 const char *name, int name_len, int add_backref, u64 index);
1862 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
1863 struct btrfs_root *root,
1864 struct inode *inode, u64 new_size,
1867 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
1868 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
1869 int btrfs_writepages(struct address_space *mapping,
1870 struct writeback_control *wbc);
1871 int btrfs_create_subvol_root(struct btrfs_root *new_root, struct dentry *dentry,
1872 struct btrfs_trans_handle *trans, u64 new_dirid,
1873 struct btrfs_block_group_cache *block_group);
1875 void btrfs_invalidate_dcache_root(struct btrfs_root *root, char *name,
1878 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1879 size_t size, struct bio *bio, unsigned long bio_flags);
1881 unsigned long btrfs_force_ra(struct address_space *mapping,
1882 struct file_ra_state *ra, struct file *file,
1883 pgoff_t offset, pgoff_t last_index);
1884 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1886 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1887 int btrfs_readpage(struct file *file, struct page *page);
1888 void btrfs_delete_inode(struct inode *inode);
1889 void btrfs_put_inode(struct inode *inode);
1890 void btrfs_read_locked_inode(struct inode *inode);
1891 int btrfs_write_inode(struct inode *inode, int wait);
1892 void btrfs_dirty_inode(struct inode *inode);
1893 struct inode *btrfs_alloc_inode(struct super_block *sb);
1894 void btrfs_destroy_inode(struct inode *inode);
1895 int btrfs_init_cachep(void);
1896 void btrfs_destroy_cachep(void);
1897 long btrfs_ioctl_trans_end(struct file *file);
1898 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1899 struct btrfs_root *root, int wait);
1900 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1901 struct btrfs_root *root);
1902 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
1903 struct btrfs_root *root, int *is_new);
1904 int btrfs_commit_write(struct file *file, struct page *page,
1905 unsigned from, unsigned to);
1906 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1907 size_t page_offset, u64 start, u64 end,
1909 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1910 struct btrfs_root *root,
1911 struct inode *inode);
1912 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
1913 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
1914 void btrfs_orphan_cleanup(struct btrfs_root *root);
1915 int btrfs_cont_expand(struct inode *inode, loff_t size);
1918 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1921 int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
1922 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
1924 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1925 extern struct file_operations btrfs_file_operations;
1926 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1927 struct btrfs_root *root, struct inode *inode,
1928 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1929 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
1930 struct btrfs_root *root,
1931 struct inode *inode, u64 start, u64 end);
1932 int btrfs_release_file(struct inode *inode, struct file *file);
1935 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1936 struct btrfs_root *root, int cache_only);
1939 int btrfs_init_sysfs(void);
1940 void btrfs_exit_sysfs(void);
1941 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1942 int btrfs_sysfs_add_root(struct btrfs_root *root);
1943 void btrfs_sysfs_del_root(struct btrfs_root *root);
1944 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1947 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1950 u64 btrfs_parse_size(char *str);
1951 int btrfs_parse_options(struct btrfs_root *root, char *options);
1952 int btrfs_sync_fs(struct super_block *sb, int wait);
1955 int btrfs_check_acl(struct inode *inode, int mask);
1956 int btrfs_init_acl(struct inode *inode, struct inode *dir);
1957 int btrfs_acl_chmod(struct inode *inode);
1959 /* free-space-cache.c */
1960 int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
1961 u64 bytenr, u64 size);
1962 int btrfs_add_free_space_lock(struct btrfs_block_group_cache *block_group,
1963 u64 offset, u64 bytes);
1964 int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
1965 u64 bytenr, u64 size);
1966 int btrfs_remove_free_space_lock(struct btrfs_block_group_cache *block_group,
1967 u64 offset, u64 bytes);
1968 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
1970 struct btrfs_free_space *btrfs_find_free_space(struct btrfs_block_group_cache
1971 *block_group, u64 offset,
1973 void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
1975 u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group);