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 "_BHRfS_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
114 #define BTRFS_CSUM_TYPE_CRC32 0
116 static int btrfs_csum_sizes[] = { 4, 0 };
118 /* four bytes for CRC32 */
119 //#define BTRFS_CRC32_SIZE 4
120 #define BTRFS_EMPTY_DIR_SIZE 0
122 #define BTRFS_FT_UNKNOWN 0
123 #define BTRFS_FT_REG_FILE 1
124 #define BTRFS_FT_DIR 2
125 #define BTRFS_FT_CHRDEV 3
126 #define BTRFS_FT_BLKDEV 4
127 #define BTRFS_FT_FIFO 5
128 #define BTRFS_FT_SOCK 6
129 #define BTRFS_FT_SYMLINK 7
130 #define BTRFS_FT_XATTR 8
131 #define BTRFS_FT_MAX 9
134 * the key defines the order in the tree, and so it also defines (optimal)
135 * block layout. objectid corresonds to the inode number. The flags
136 * tells us things about the object, and is a kind of stream selector.
137 * so for a given inode, keys with flags of 1 might refer to the inode
138 * data, flags of 2 may point to file data in the btree and flags == 3
139 * may point to extents.
141 * offset is the starting byte offset for this key in the stream.
143 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
144 * in cpu native order. Otherwise they are identical and their sizes
145 * should be the same (ie both packed)
147 struct btrfs_disk_key {
151 } __attribute__ ((__packed__));
157 } __attribute__ ((__packed__));
159 struct btrfs_mapping_tree {
160 struct extent_map_tree map_tree;
163 #define BTRFS_UUID_SIZE 16
164 struct btrfs_dev_item {
165 /* the internal btrfs device id */
168 /* size of the device */
174 /* optimal io alignment for this device */
177 /* optimal io width for this device */
180 /* minimal io size for this device */
183 /* type and info about this device */
186 /* expected generation for this device */
189 /* grouping information for allocation decisions */
192 /* seek speed 0-100 where 100 is fastest */
195 /* bandwidth 0-100 where 100 is fastest */
198 /* btrfs generated uuid for this device */
199 u8 uuid[BTRFS_UUID_SIZE];
201 /* uuid of FS who owns this device */
202 u8 fsid[BTRFS_UUID_SIZE];
203 } __attribute__ ((__packed__));
205 struct btrfs_stripe {
208 u8 dev_uuid[BTRFS_UUID_SIZE];
209 } __attribute__ ((__packed__));
212 /* size of this chunk in bytes */
215 /* objectid of the root referencing this chunk */
221 /* optimal io alignment for this chunk */
224 /* optimal io width for this chunk */
227 /* minimal io size for this chunk */
230 /* 2^16 stripes is quite a lot, a second limit is the size of a single
235 /* sub stripes only matter for raid10 */
237 struct btrfs_stripe stripe;
238 /* additional stripes go here */
239 } __attribute__ ((__packed__));
241 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
243 BUG_ON(num_stripes == 0);
244 return sizeof(struct btrfs_chunk) +
245 sizeof(struct btrfs_stripe) * (num_stripes - 1);
248 #define BTRFS_FSID_SIZE 16
249 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
252 * every tree block (leaf or node) starts with this header.
254 struct btrfs_header {
255 /* these first four must match the super block */
256 u8 csum[BTRFS_CSUM_SIZE];
257 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
258 __le64 bytenr; /* which block this node is supposed to live in */
261 /* allowed to be different from the super from here on down */
262 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
267 } __attribute__ ((__packed__));
269 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
270 sizeof(struct btrfs_header)) / \
271 sizeof(struct btrfs_key_ptr))
272 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
273 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
274 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
275 sizeof(struct btrfs_item) - \
276 sizeof(struct btrfs_file_extent_item))
278 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
281 * this is a very generous portion of the super block, giving us
282 * room to translate 14 chunks with 3 stripes each.
284 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
285 #define BTRFS_LABEL_SIZE 256
288 * the super block basically lists the main trees of the FS
289 * it currently lacks any block count etc etc
291 struct btrfs_super_block {
292 u8 csum[BTRFS_CSUM_SIZE];
293 /* the first 4 fields must match struct btrfs_header */
294 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
295 __le64 bytenr; /* this block number */
298 /* allowed to be different from the btrfs_header from here own down */
306 __le64 root_dir_objectid;
312 __le32 sys_chunk_array_size;
313 __le64 chunk_root_generation;
315 __le64 compat_ro_flags;
316 __le64 incompat_flags;
321 struct btrfs_dev_item dev_item;
322 char label[BTRFS_LABEL_SIZE];
323 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
324 } __attribute__ ((__packed__));
327 * Compat flags that we support. If any incompat flags are set other than the
328 * ones specified below then we will fail to mount
330 #define BTRFS_FEATURE_COMPAT_SUPP 0x0
331 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0x0
332 #define BTRFS_FEATURE_INCOMPAT_SUPP 0x0
335 * A leaf is full of items. offset and size tell us where to find
336 * the item in the leaf (relative to the start of the data area)
339 struct btrfs_disk_key key;
342 } __attribute__ ((__packed__));
345 * leaves have an item area and a data area:
346 * [item0, item1....itemN] [free space] [dataN...data1, data0]
348 * The data is separate from the items to get the keys closer together
352 struct btrfs_header header;
353 struct btrfs_item items[];
354 } __attribute__ ((__packed__));
357 * all non-leaf blocks are nodes, they hold only keys and pointers to
360 struct btrfs_key_ptr {
361 struct btrfs_disk_key key;
364 } __attribute__ ((__packed__));
367 struct btrfs_header header;
368 struct btrfs_key_ptr ptrs[];
369 } __attribute__ ((__packed__));
372 * btrfs_paths remember the path taken from the root down to the leaf.
373 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
374 * to any other levels that are present.
376 * The slots array records the index of the item or block pointer
377 * used while walking the tree.
380 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
381 int slots[BTRFS_MAX_LEVEL];
382 /* if there is real range locking, this locks field will change */
383 int locks[BTRFS_MAX_LEVEL];
385 /* keep some upper locks as we walk down */
392 * items in the extent btree are used to record the objectid of the
393 * owner of the block and the number of references
395 struct btrfs_extent_item {
397 } __attribute__ ((__packed__));
399 struct btrfs_extent_ref {
404 } __attribute__ ((__packed__));
406 /* dev extents record free space on individual devices. The owner
407 * field points back to the chunk allocation mapping tree that allocated
408 * the extent. The chunk tree uuid field is a way to double check the owner
410 struct btrfs_dev_extent {
412 __le64 chunk_objectid;
415 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
416 } __attribute__ ((__packed__));
418 struct btrfs_inode_ref {
422 } __attribute__ ((__packed__));
424 struct btrfs_timespec {
427 } __attribute__ ((__packed__));
430 BTRFS_COMPRESS_NONE = 0,
431 BTRFS_COMPRESS_ZLIB = 1,
432 BTRFS_COMPRESS_LAST = 2,
433 } btrfs_compression_type;
435 /* we don't understand any encryption methods right now */
437 BTRFS_ENCRYPTION_NONE = 0,
438 BTRFS_ENCRYPTION_LAST = 1,
439 } btrfs_encryption_type;
441 struct btrfs_inode_item {
442 /* nfs style generation number */
444 /* transid that last touched this inode */
456 struct btrfs_timespec atime;
457 struct btrfs_timespec ctime;
458 struct btrfs_timespec mtime;
459 struct btrfs_timespec otime;
460 } __attribute__ ((__packed__));
462 struct btrfs_dir_log_item {
464 } __attribute__ ((__packed__));
466 struct btrfs_dir_item {
467 struct btrfs_disk_key location;
472 } __attribute__ ((__packed__));
474 struct btrfs_root_item {
475 struct btrfs_inode_item inode;
481 __le64 last_snapshot;
484 struct btrfs_disk_key drop_progress;
487 } __attribute__ ((__packed__));
490 * this is used for both forward and backward root refs
492 struct btrfs_root_ref {
496 } __attribute__ ((__packed__));
498 #define BTRFS_FILE_EXTENT_INLINE 0
499 #define BTRFS_FILE_EXTENT_REG 1
500 #define BTRFS_FILE_EXTENT_PREALLOC 2
502 struct btrfs_file_extent_item {
504 * transaction id that created this extent
508 * max number of bytes to hold this extent in ram
509 * when we split a compressed extent we can't know how big
510 * each of the resulting pieces will be. So, this is
511 * an upper limit on the size of the extent in ram instead of
517 * 32 bits for the various ways we might encode the data,
518 * including compression and encryption. If any of these
519 * are set to something a given disk format doesn't understand
520 * it is treated like an incompat flag for reading and writing,
525 __le16 other_encoding; /* spare for later use */
527 /* are we inline data or a real extent? */
531 * disk space consumed by the extent, checksum blocks are included
535 __le64 disk_num_bytes;
537 * the logical offset in file blocks (no csums)
538 * this extent record is for. This allows a file extent to point
539 * into the middle of an existing extent on disk, sharing it
540 * between two snapshots (useful if some bytes in the middle of the
541 * extent have changed
545 * the logical number of file blocks (no csums included). This
546 * always reflects the size uncompressed and without encoding.
550 } __attribute__ ((__packed__));
552 struct btrfs_csum_item {
554 } __attribute__ ((__packed__));
556 /* different types of block groups (and chunks) */
557 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
558 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
559 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
560 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
561 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
562 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
563 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
565 struct btrfs_block_group_item {
567 __le64 chunk_objectid;
569 } __attribute__ ((__packed__));
571 struct btrfs_space_info {
580 struct list_head list;
582 /* for block groups in our same type */
583 struct list_head block_groups;
585 struct rw_semaphore groups_sem;
588 struct btrfs_free_space {
589 struct rb_node bytes_index;
590 struct rb_node offset_index;
595 struct btrfs_block_group_cache {
596 struct btrfs_key key;
597 struct btrfs_block_group_item item;
599 struct mutex alloc_mutex;
600 struct mutex cache_mutex;
608 struct btrfs_space_info *space_info;
610 /* free space cache stuff */
611 struct rb_root free_space_bytes;
612 struct rb_root free_space_offset;
614 /* block group cache stuff */
615 struct rb_node cache_node;
617 /* for block groups in the same raid type */
618 struct list_head list;
621 struct btrfs_leaf_ref_tree {
623 struct list_head list;
628 struct btrfs_fs_devices;
629 struct btrfs_fs_info {
630 u8 fsid[BTRFS_FSID_SIZE];
631 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
632 struct btrfs_root *extent_root;
633 struct btrfs_root *tree_root;
634 struct btrfs_root *chunk_root;
635 struct btrfs_root *dev_root;
636 struct btrfs_root *fs_root;
638 /* the log root tree is a directory of all the other log roots */
639 struct btrfs_root *log_root_tree;
640 struct radix_tree_root fs_roots_radix;
642 /* block group cache stuff */
643 spinlock_t block_group_cache_lock;
644 struct rb_root block_group_cache_tree;
646 struct extent_io_tree pinned_extents;
647 struct extent_io_tree pending_del;
648 struct extent_io_tree extent_ins;
650 /* logical->physical extent mapping */
651 struct btrfs_mapping_tree mapping_tree;
654 u64 last_trans_committed;
655 u64 last_trans_new_blockgroup;
656 u64 open_ioctl_trans;
657 unsigned long mount_opt;
661 struct btrfs_transaction *running_transaction;
662 wait_queue_head_t transaction_throttle;
663 wait_queue_head_t transaction_wait;
665 wait_queue_head_t async_submit_wait;
666 wait_queue_head_t tree_log_wait;
668 struct btrfs_super_block super_copy;
669 struct btrfs_super_block super_for_commit;
670 struct block_device *__bdev;
671 struct super_block *sb;
672 struct inode *btree_inode;
673 struct backing_dev_info bdi;
674 spinlock_t hash_lock;
675 struct mutex trans_mutex;
676 struct mutex tree_log_mutex;
677 struct mutex transaction_kthread_mutex;
678 struct mutex cleaner_mutex;
679 struct mutex extent_ins_mutex;
680 struct mutex pinned_mutex;
681 struct mutex chunk_mutex;
682 struct mutex drop_mutex;
683 struct mutex volume_mutex;
684 struct mutex tree_reloc_mutex;
685 struct list_head trans_list;
686 struct list_head hashers;
687 struct list_head dead_roots;
689 atomic_t nr_async_submits;
690 atomic_t async_submit_draining;
691 atomic_t nr_async_bios;
692 atomic_t async_delalloc_pages;
693 atomic_t tree_log_writers;
694 atomic_t tree_log_commit;
695 unsigned long tree_log_batch;
696 u64 tree_log_transid;
699 * this is used by the balancing code to wait for all the pending
702 spinlock_t ordered_extent_lock;
703 struct list_head ordered_extents;
704 struct list_head delalloc_inodes;
707 * there is a pool of worker threads for checksumming during writes
708 * and a pool for checksumming after reads. This is because readers
709 * can run with FS locks held, and the writers may be waiting for
710 * those locks. We don't want ordering in the pending list to cause
711 * deadlocks, and so the two are serviced separately.
713 * A third pool does submit_bio to avoid deadlocking with the other
716 struct btrfs_workers workers;
717 struct btrfs_workers delalloc_workers;
718 struct btrfs_workers endio_workers;
719 struct btrfs_workers endio_write_workers;
720 struct btrfs_workers submit_workers;
722 * fixup workers take dirty pages that didn't properly go through
723 * the cow mechanism and make them safe to write. It happens
724 * for the sys_munmap function call path
726 struct btrfs_workers fixup_workers;
727 struct task_struct *transaction_kthread;
728 struct task_struct *cleaner_kthread;
729 int thread_pool_size;
731 /* tree relocation relocated fields */
732 struct list_head dead_reloc_roots;
733 struct btrfs_leaf_ref_tree reloc_ref_tree;
734 struct btrfs_leaf_ref_tree shared_ref_tree;
736 struct kobject super_kobj;
737 struct completion kobj_unregister;
740 int log_root_recovering;
742 atomic_t throttle_gen;
745 struct list_head dirty_cowonly_roots;
747 struct btrfs_fs_devices *fs_devices;
748 struct list_head space_info;
749 spinlock_t delalloc_lock;
750 spinlock_t new_trans_lock;
755 spinlock_t ref_cache_lock;
756 u64 total_ref_cache_size;
758 u64 avail_data_alloc_bits;
759 u64 avail_metadata_alloc_bits;
760 u64 avail_system_alloc_bits;
761 u64 data_alloc_profile;
762 u64 metadata_alloc_profile;
763 u64 system_alloc_profile;
769 * in ram representation of the tree. extent_root is used for all allocations
770 * and for the extent tree extent_root root.
772 struct btrfs_dirty_root;
774 struct extent_buffer *node;
776 /* the node lock is held while changing the node pointer */
777 spinlock_t node_lock;
779 struct extent_buffer *commit_root;
780 struct btrfs_leaf_ref_tree *ref_tree;
781 struct btrfs_leaf_ref_tree ref_tree_struct;
782 struct btrfs_dirty_root *dirty_root;
783 struct btrfs_root *log_root;
784 struct btrfs_root *reloc_root;
786 struct btrfs_root_item root_item;
787 struct btrfs_key root_key;
788 struct btrfs_fs_info *fs_info;
789 struct extent_io_tree dirty_log_pages;
791 struct kobject root_kobj;
792 struct completion kobj_unregister;
793 struct mutex objectid_mutex;
794 struct mutex log_mutex;
799 /* data allocations are done in sectorsize units */
802 /* node allocations are done in nodesize units */
805 /* leaf allocations are done in leafsize units */
812 u64 last_inode_alloc;
815 u64 defrag_trans_start;
816 struct btrfs_key defrag_progress;
817 struct btrfs_key defrag_max;
823 /* the dirty list is only used by non-reference counted roots */
824 struct list_head dirty_list;
826 spinlock_t list_lock;
827 struct list_head dead_list;
828 struct list_head orphan_list;
831 * right now this just gets used so that a root has its own devid
832 * for stat. It may be used for more later
834 struct super_block anon_super;
839 * inode items have the data typically returned from stat and store other
840 * info about object characteristics. There is one for every file and dir in
843 #define BTRFS_INODE_ITEM_KEY 1
844 #define BTRFS_INODE_REF_KEY 12
845 #define BTRFS_XATTR_ITEM_KEY 24
846 #define BTRFS_ORPHAN_ITEM_KEY 48
847 /* reserve 2-15 close to the inode for later flexibility */
850 * dir items are the name -> inode pointers in a directory. There is one
851 * for every name in a directory.
853 #define BTRFS_DIR_LOG_ITEM_KEY 60
854 #define BTRFS_DIR_LOG_INDEX_KEY 72
855 #define BTRFS_DIR_ITEM_KEY 84
856 #define BTRFS_DIR_INDEX_KEY 96
858 * extent data is for file data
860 #define BTRFS_EXTENT_DATA_KEY 108
862 * csum items have the checksums for data in the extents
864 #define BTRFS_CSUM_ITEM_KEY 120
867 /* reserve 21-31 for other file/dir stuff */
870 * root items point to tree roots. There are typically in the root
871 * tree used by the super block to find all the other trees
873 #define BTRFS_ROOT_ITEM_KEY 132
876 * root backrefs tie subvols and snapshots to the directory entries that
879 #define BTRFS_ROOT_BACKREF_KEY 144
882 * root refs make a fast index for listing all of the snapshots and
883 * subvolumes referenced by a given root. They point directly to the
884 * directory item in the root that references the subvol
886 #define BTRFS_ROOT_REF_KEY 156
889 * extent items are in the extent map tree. These record which blocks
890 * are used, and how many references there are to each block
892 #define BTRFS_EXTENT_ITEM_KEY 168
893 #define BTRFS_EXTENT_REF_KEY 180
896 * block groups give us hints into the extent allocation trees. Which
897 * blocks are free etc etc
899 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
901 #define BTRFS_DEV_EXTENT_KEY 204
902 #define BTRFS_DEV_ITEM_KEY 216
903 #define BTRFS_CHUNK_ITEM_KEY 228
906 * string items are for debugging. They just store a short string of
909 #define BTRFS_STRING_ITEM_KEY 253
911 #define BTRFS_MOUNT_NODATASUM (1 << 0)
912 #define BTRFS_MOUNT_NODATACOW (1 << 1)
913 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
914 #define BTRFS_MOUNT_SSD (1 << 3)
915 #define BTRFS_MOUNT_DEGRADED (1 << 4)
916 #define BTRFS_MOUNT_COMPRESS (1 << 5)
918 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
919 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
920 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
925 #define BTRFS_INODE_NODATASUM (1 << 0)
926 #define BTRFS_INODE_NODATACOW (1 << 1)
927 #define BTRFS_INODE_READONLY (1 << 2)
928 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
929 #define BTRFS_INODE_PREALLOC (1 << 4)
930 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
932 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
934 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
936 /* some macros to generate set/get funcs for the struct fields. This
937 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
940 #define le8_to_cpu(v) (v)
941 #define cpu_to_le8(v) (v)
944 #define read_eb_member(eb, ptr, type, member, result) ( \
945 read_extent_buffer(eb, (char *)(result), \
946 ((unsigned long)(ptr)) + \
947 offsetof(type, member), \
948 sizeof(((type *)0)->member)))
950 #define write_eb_member(eb, ptr, type, member, result) ( \
951 write_extent_buffer(eb, (char *)(result), \
952 ((unsigned long)(ptr)) + \
953 offsetof(type, member), \
954 sizeof(((type *)0)->member)))
956 #ifndef BTRFS_SETGET_FUNCS
957 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
958 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
959 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
962 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
963 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
965 type *p = kmap_atomic(eb->first_page, KM_USER0); \
966 u##bits res = le##bits##_to_cpu(p->member); \
967 kunmap_atomic(p, KM_USER0); \
970 static inline void btrfs_set_##name(struct extent_buffer *eb, \
973 type *p = kmap_atomic(eb->first_page, KM_USER0); \
974 p->member = cpu_to_le##bits(val); \
975 kunmap_atomic(p, KM_USER0); \
978 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
979 static inline u##bits btrfs_##name(type *s) \
981 return le##bits##_to_cpu(s->member); \
983 static inline void btrfs_set_##name(type *s, u##bits val) \
985 s->member = cpu_to_le##bits(val); \
988 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
989 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
990 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
991 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
992 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
993 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
994 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
995 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
996 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
997 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
998 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1000 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1001 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1003 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1005 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1007 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1009 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1011 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1012 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1014 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1016 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1018 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1021 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1023 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1026 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1028 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1031 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1032 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1033 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1034 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1035 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1036 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1037 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1038 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1039 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1040 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1041 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1043 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1045 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1048 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1049 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1050 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1052 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1054 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1056 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1058 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1059 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1061 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1063 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1064 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1066 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1069 unsigned long offset = (unsigned long)c;
1070 offset += offsetof(struct btrfs_chunk, stripe);
1071 offset += nr * sizeof(struct btrfs_stripe);
1072 return (struct btrfs_stripe *)offset;
1075 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1077 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1080 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1081 struct btrfs_chunk *c, int nr)
1083 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1086 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1087 struct btrfs_chunk *c, int nr,
1090 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1093 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1094 struct btrfs_chunk *c, int nr)
1096 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1099 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1100 struct btrfs_chunk *c, int nr,
1103 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1106 /* struct btrfs_block_group_item */
1107 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1109 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1111 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1112 struct btrfs_block_group_item, chunk_objectid, 64);
1114 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1115 struct btrfs_block_group_item, chunk_objectid, 64);
1116 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1117 struct btrfs_block_group_item, flags, 64);
1118 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1119 struct btrfs_block_group_item, flags, 64);
1121 /* struct btrfs_inode_ref */
1122 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1123 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1125 /* struct btrfs_inode_item */
1126 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1127 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1128 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1129 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1130 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1131 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1132 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1133 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1134 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1135 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1136 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1138 static inline struct btrfs_timespec *
1139 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1141 unsigned long ptr = (unsigned long)inode_item;
1142 ptr += offsetof(struct btrfs_inode_item, atime);
1143 return (struct btrfs_timespec *)ptr;
1146 static inline struct btrfs_timespec *
1147 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1149 unsigned long ptr = (unsigned long)inode_item;
1150 ptr += offsetof(struct btrfs_inode_item, mtime);
1151 return (struct btrfs_timespec *)ptr;
1154 static inline struct btrfs_timespec *
1155 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1157 unsigned long ptr = (unsigned long)inode_item;
1158 ptr += offsetof(struct btrfs_inode_item, ctime);
1159 return (struct btrfs_timespec *)ptr;
1162 static inline struct btrfs_timespec *
1163 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1165 unsigned long ptr = (unsigned long)inode_item;
1166 ptr += offsetof(struct btrfs_inode_item, otime);
1167 return (struct btrfs_timespec *)ptr;
1170 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1171 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1173 /* struct btrfs_dev_extent */
1174 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1176 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1177 chunk_objectid, 64);
1178 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1180 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1182 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1184 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1185 return (u8 *)((unsigned long)dev + ptr);
1188 /* struct btrfs_extent_ref */
1189 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1190 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1191 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1192 BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
1194 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1195 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1197 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1199 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
1202 /* struct btrfs_extent_item */
1203 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1204 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1207 /* struct btrfs_node */
1208 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1209 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1211 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1214 ptr = offsetof(struct btrfs_node, ptrs) +
1215 sizeof(struct btrfs_key_ptr) * nr;
1216 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1219 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1223 ptr = offsetof(struct btrfs_node, ptrs) +
1224 sizeof(struct btrfs_key_ptr) * nr;
1225 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1228 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1231 ptr = offsetof(struct btrfs_node, ptrs) +
1232 sizeof(struct btrfs_key_ptr) * nr;
1233 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1236 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1240 ptr = offsetof(struct btrfs_node, ptrs) +
1241 sizeof(struct btrfs_key_ptr) * nr;
1242 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1245 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1247 return offsetof(struct btrfs_node, ptrs) +
1248 sizeof(struct btrfs_key_ptr) * nr;
1251 void btrfs_node_key(struct extent_buffer *eb,
1252 struct btrfs_disk_key *disk_key, int nr);
1254 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1255 struct btrfs_disk_key *disk_key, int nr)
1258 ptr = btrfs_node_key_ptr_offset(nr);
1259 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1260 struct btrfs_key_ptr, key, disk_key);
1263 /* struct btrfs_item */
1264 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1265 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1267 static inline unsigned long btrfs_item_nr_offset(int nr)
1269 return offsetof(struct btrfs_leaf, items) +
1270 sizeof(struct btrfs_item) * nr;
1273 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1276 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1279 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1280 struct btrfs_item *item)
1282 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1285 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1287 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1290 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1292 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1295 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1297 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1300 static inline void btrfs_item_key(struct extent_buffer *eb,
1301 struct btrfs_disk_key *disk_key, int nr)
1303 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1304 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1307 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1308 struct btrfs_disk_key *disk_key, int nr)
1310 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1311 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1314 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1317 * struct btrfs_root_ref
1319 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1320 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1321 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1323 /* struct btrfs_dir_item */
1324 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1325 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1326 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1327 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1329 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1330 struct btrfs_dir_item *item,
1331 struct btrfs_disk_key *key)
1333 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1336 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1337 struct btrfs_dir_item *item,
1338 struct btrfs_disk_key *key)
1340 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1343 /* struct btrfs_disk_key */
1344 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1346 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1347 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1349 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1350 struct btrfs_disk_key *disk)
1352 cpu->offset = le64_to_cpu(disk->offset);
1353 cpu->type = disk->type;
1354 cpu->objectid = le64_to_cpu(disk->objectid);
1357 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1358 struct btrfs_key *cpu)
1360 disk->offset = cpu_to_le64(cpu->offset);
1361 disk->type = cpu->type;
1362 disk->objectid = cpu_to_le64(cpu->objectid);
1365 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1366 struct btrfs_key *key, int nr)
1368 struct btrfs_disk_key disk_key;
1369 btrfs_node_key(eb, &disk_key, nr);
1370 btrfs_disk_key_to_cpu(key, &disk_key);
1373 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1374 struct btrfs_key *key, int nr)
1376 struct btrfs_disk_key disk_key;
1377 btrfs_item_key(eb, &disk_key, nr);
1378 btrfs_disk_key_to_cpu(key, &disk_key);
1381 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1382 struct btrfs_dir_item *item,
1383 struct btrfs_key *key)
1385 struct btrfs_disk_key disk_key;
1386 btrfs_dir_item_key(eb, item, &disk_key);
1387 btrfs_disk_key_to_cpu(key, &disk_key);
1391 static inline u8 btrfs_key_type(struct btrfs_key *key)
1396 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1401 /* struct btrfs_header */
1402 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1403 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1405 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1406 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1407 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1408 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1410 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1412 return (btrfs_header_flags(eb) & flag) == flag;
1415 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1417 u64 flags = btrfs_header_flags(eb);
1418 btrfs_set_header_flags(eb, flags | flag);
1419 return (flags & flag) == flag;
1422 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1424 u64 flags = btrfs_header_flags(eb);
1425 btrfs_set_header_flags(eb, flags & ~flag);
1426 return (flags & flag) == flag;
1429 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1431 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1435 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1437 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1441 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1443 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1447 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1449 unsigned long ptr = offsetof(struct btrfs_header, csum);
1453 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1458 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1463 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1468 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1470 return (btrfs_header_level(eb) == 0);
1473 /* struct btrfs_root_item */
1474 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1476 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1477 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1478 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1480 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1482 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1483 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1484 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1485 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1486 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1487 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1488 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1489 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1492 /* struct btrfs_super_block */
1494 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1495 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1496 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1498 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1499 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1500 struct btrfs_super_block, sys_chunk_array_size, 32);
1501 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1502 struct btrfs_super_block, chunk_root_generation, 64);
1503 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1505 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1507 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1508 chunk_root_level, 8);
1509 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1511 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1513 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1515 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1517 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1519 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1521 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1523 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1525 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1526 root_dir_objectid, 64);
1527 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1529 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1531 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1533 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1534 incompat_flags, 64);
1535 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1538 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1540 int t = btrfs_super_csum_type(s);
1541 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1542 return btrfs_csum_sizes[t];
1545 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1547 return offsetof(struct btrfs_leaf, items);
1550 /* struct btrfs_file_extent_item */
1551 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1553 static inline unsigned long btrfs_file_extent_inline_start(struct
1554 btrfs_file_extent_item *e)
1556 unsigned long offset = (unsigned long)e;
1557 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1561 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1563 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1566 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1568 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1570 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1571 disk_num_bytes, 64);
1572 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1574 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1576 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1578 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1580 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1582 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1583 other_encoding, 16);
1585 /* this returns the number of file bytes represented by the inline item.
1586 * If an item is compressed, this is the uncompressed size
1588 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1589 struct btrfs_file_extent_item *e)
1591 return btrfs_file_extent_ram_bytes(eb, e);
1595 * this returns the number of bytes used by the item on disk, minus the
1596 * size of any extent headers. If a file is compressed on disk, this is
1597 * the compressed size
1599 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1600 struct btrfs_item *e)
1602 unsigned long offset;
1603 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1604 return btrfs_item_size(eb, e) - offset;
1607 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1609 return sb->s_fs_info;
1612 static inline int btrfs_set_root_name(struct btrfs_root *root,
1613 const char *name, int len)
1615 /* if we already have a name just free it */
1619 root->name = kmalloc(len+1, GFP_KERNEL);
1623 memcpy(root->name, name, len);
1624 root->name[len] ='\0';
1629 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1631 return root->leafsize;
1632 return root->nodesize;
1635 /* helper function to cast into the data area of the leaf. */
1636 #define btrfs_item_ptr(leaf, slot, type) \
1637 ((type *)(btrfs_leaf_data(leaf) + \
1638 btrfs_item_offset_nr(leaf, slot)))
1640 #define btrfs_item_ptr_offset(leaf, slot) \
1641 ((unsigned long)(btrfs_leaf_data(leaf) + \
1642 btrfs_item_offset_nr(leaf, slot)))
1644 static inline struct dentry *fdentry(struct file *file)
1646 return file->f_path.dentry;
1650 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
1651 int btrfs_lookup_extent_ref(struct btrfs_trans_handle *trans,
1652 struct btrfs_root *root, u64 bytenr,
1653 u64 num_bytes, u32 *refs);
1654 int btrfs_update_pinned_extents(struct btrfs_root *root,
1655 u64 bytenr, u64 num, int pin);
1656 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1657 struct btrfs_root *root, struct extent_buffer *leaf);
1658 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
1659 struct btrfs_root *root, u64 bytenr);
1660 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1661 struct btrfs_root *root);
1662 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1663 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1664 btrfs_fs_info *info,
1666 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1667 struct btrfs_block_group_cache
1668 *hint, u64 search_start,
1669 int data, int owner);
1670 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1671 struct btrfs_root *root,
1672 u32 blocksize, u64 parent,
1678 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1679 struct btrfs_root *root,
1680 u64 bytenr, u32 blocksize);
1681 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1682 struct btrfs_root *root,
1683 u64 num_bytes, u64 parent, u64 min_bytes,
1684 u64 root_objectid, u64 ref_generation,
1685 u64 owner, u64 empty_size, u64 hint_byte,
1686 u64 search_end, struct btrfs_key *ins, u64 data);
1687 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1688 struct btrfs_root *root, u64 parent,
1689 u64 root_objectid, u64 ref_generation,
1690 u64 owner, struct btrfs_key *ins);
1691 int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
1692 struct btrfs_root *root, u64 parent,
1693 u64 root_objectid, u64 ref_generation,
1694 u64 owner, struct btrfs_key *ins);
1695 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1696 struct btrfs_root *root,
1697 u64 num_bytes, u64 min_alloc_size,
1698 u64 empty_size, u64 hint_byte,
1699 u64 search_end, struct btrfs_key *ins,
1701 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1702 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1704 int btrfs_cache_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1705 struct extent_buffer *buf, u32 nr_extents);
1706 int btrfs_update_ref(struct btrfs_trans_handle *trans,
1707 struct btrfs_root *root, struct extent_buffer *orig_buf,
1708 struct extent_buffer *buf, int start_slot, int nr);
1709 int btrfs_free_extent(struct btrfs_trans_handle *trans,
1710 struct btrfs_root *root,
1711 u64 bytenr, u64 num_bytes, u64 parent,
1712 u64 root_objectid, u64 ref_generation,
1713 u64 owner_objectid, int pin);
1714 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
1715 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1716 struct btrfs_root *root,
1717 struct extent_io_tree *unpin);
1718 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1719 struct btrfs_root *root,
1720 u64 bytenr, u64 num_bytes, u64 parent,
1721 u64 root_objectid, u64 ref_generation,
1722 u64 owner_objectid);
1723 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1724 struct btrfs_root *root, u64 bytenr,
1725 u64 orig_parent, u64 parent,
1726 u64 root_objectid, u64 ref_generation,
1727 u64 owner_objectid);
1728 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1729 struct btrfs_root *root);
1730 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1731 int btrfs_read_block_groups(struct btrfs_root *root);
1732 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1733 struct btrfs_root *root, u64 bytes_used,
1734 u64 type, u64 chunk_objectid, u64 chunk_offset,
1736 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
1737 struct btrfs_root *root, u64 group_start);
1738 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
1739 int btrfs_free_reloc_root(struct btrfs_trans_handle *trans,
1740 struct btrfs_root *root);
1741 int btrfs_drop_dead_reloc_roots(struct btrfs_root *root);
1742 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle *trans,
1743 struct btrfs_root *root,
1744 struct extent_buffer *buf, u64 orig_start);
1745 int btrfs_add_dead_reloc_root(struct btrfs_root *root);
1746 int btrfs_cleanup_reloc_trees(struct btrfs_root *root);
1747 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
1749 int btrfs_previous_item(struct btrfs_root *root,
1750 struct btrfs_path *path, u64 min_objectid,
1752 int btrfs_merge_path(struct btrfs_trans_handle *trans,
1753 struct btrfs_root *root,
1754 struct btrfs_key *node_keys,
1755 u64 *nodes, int lowest_level);
1756 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1757 struct btrfs_root *root, struct btrfs_path *path,
1758 struct btrfs_key *new_key);
1759 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1760 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1761 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1762 struct btrfs_key *key, int lowest_level,
1763 int cache_only, u64 min_trans);
1764 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1765 struct btrfs_key *max_key,
1766 struct btrfs_path *path, int cache_only,
1768 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1769 struct btrfs_root *root, struct extent_buffer *buf,
1770 struct extent_buffer *parent, int parent_slot,
1771 struct extent_buffer **cow_ret, u64 prealloc_dest);
1772 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1773 struct btrfs_root *root,
1774 struct extent_buffer *buf,
1775 struct extent_buffer **cow_ret, u64 new_root_objectid);
1776 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1777 *root, struct btrfs_path *path, u32 data_size);
1778 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1779 struct btrfs_root *root,
1780 struct btrfs_path *path,
1781 u32 new_size, int from_end);
1782 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1783 *root, struct btrfs_key *key, struct btrfs_path *p, int
1785 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1786 struct btrfs_root *root, struct extent_buffer *parent,
1787 int start_slot, int cache_only, u64 *last_ret,
1788 struct btrfs_key *progress);
1789 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1790 struct btrfs_path *btrfs_alloc_path(void);
1791 void btrfs_free_path(struct btrfs_path *p);
1792 void btrfs_init_path(struct btrfs_path *p);
1793 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1794 struct btrfs_path *path, int slot, int nr);
1795 int btrfs_del_leaf(struct btrfs_trans_handle *trans,
1796 struct btrfs_root *root,
1797 struct btrfs_path *path, u64 bytenr);
1798 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1799 struct btrfs_root *root,
1800 struct btrfs_path *path)
1802 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1805 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1806 *root, struct btrfs_key *key, void *data, u32 data_size);
1807 int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
1808 struct btrfs_root *root,
1809 struct btrfs_path *path,
1810 struct btrfs_key *cpu_key, u32 *data_size,
1812 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1813 struct btrfs_root *root,
1814 struct btrfs_path *path,
1815 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1817 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1818 struct btrfs_root *root,
1819 struct btrfs_path *path,
1820 struct btrfs_key *key,
1823 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1826 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1827 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1828 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1829 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1831 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
1832 struct btrfs_root *root,
1833 struct extent_buffer *node,
1834 struct extent_buffer *parent);
1836 int btrfs_find_root_ref(struct btrfs_root *tree_root,
1837 struct btrfs_path *path,
1838 u64 root_id, u64 ref_id);
1839 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
1840 struct btrfs_root *tree_root,
1841 u64 root_id, u8 type, u64 ref_id,
1842 u64 dirid, u64 sequence,
1843 const char *name, int name_len);
1844 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1845 struct btrfs_key *key);
1846 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1847 *root, struct btrfs_key *key, struct btrfs_root_item
1849 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1850 *root, struct btrfs_key *key, struct btrfs_root_item
1852 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1853 btrfs_root_item *item, struct btrfs_key *key);
1854 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1855 u64 *found_objectid);
1856 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1857 struct btrfs_root *latest_root);
1859 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1860 *root, const char *name, int name_len, u64 dir,
1861 struct btrfs_key *location, u8 type, u64 index);
1862 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1863 struct btrfs_root *root,
1864 struct btrfs_path *path, u64 dir,
1865 const char *name, int name_len,
1867 struct btrfs_dir_item *
1868 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1869 struct btrfs_root *root,
1870 struct btrfs_path *path, u64 dir,
1871 u64 objectid, const char *name, int name_len,
1873 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1874 struct btrfs_path *path,
1875 const char *name, int name_len);
1876 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1877 struct btrfs_root *root,
1878 struct btrfs_path *path,
1879 struct btrfs_dir_item *di);
1880 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1881 struct btrfs_root *root, const char *name,
1882 u16 name_len, const void *data, u16 data_len,
1884 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1885 struct btrfs_root *root,
1886 struct btrfs_path *path, u64 dir,
1887 const char *name, u16 name_len,
1891 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
1892 struct btrfs_root *root, u64 offset);
1893 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
1894 struct btrfs_root *root, u64 offset);
1897 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1898 struct btrfs_root *fs_root,
1899 u64 dirid, u64 *objectid);
1900 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1903 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1904 struct btrfs_root *root,
1905 const char *name, int name_len,
1906 u64 inode_objectid, u64 ref_objectid, u64 index);
1907 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1908 struct btrfs_root *root,
1909 const char *name, int name_len,
1910 u64 inode_objectid, u64 ref_objectid, u64 *index);
1911 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1912 struct btrfs_root *root,
1913 struct btrfs_path *path, u64 objectid);
1914 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1915 *root, struct btrfs_path *path,
1916 struct btrfs_key *location, int mod);
1919 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
1921 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1922 struct btrfs_root *root,
1923 u64 objectid, u64 pos,
1924 u64 disk_offset, u64 disk_num_bytes,
1925 u64 num_bytes, u64 offset, u64 ram_bytes,
1926 u8 compression, u8 encryption, u16 other_encoding);
1927 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1928 struct btrfs_root *root,
1929 struct btrfs_path *path, u64 objectid,
1930 u64 bytenr, int mod);
1931 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1932 struct btrfs_root *root, struct inode *inode,
1933 struct btrfs_ordered_sum *sums);
1934 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
1936 int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
1937 u64 start, unsigned long len);
1938 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1939 struct btrfs_root *root,
1940 struct btrfs_path *path,
1941 u64 objectid, u64 offset,
1943 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1944 struct btrfs_root *root, struct btrfs_path *path,
1948 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1949 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
1950 #define ClearPageChecked ClearPageFsMisc
1951 #define SetPageChecked SetPageFsMisc
1952 #define PageChecked PageFsMisc
1955 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
1956 int btrfs_set_inode_index(struct inode *dir, u64 *index);
1957 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
1958 struct btrfs_root *root,
1959 struct inode *dir, struct inode *inode,
1960 const char *name, int name_len);
1961 int btrfs_add_link(struct btrfs_trans_handle *trans,
1962 struct inode *parent_inode, struct inode *inode,
1963 const char *name, int name_len, int add_backref, u64 index);
1964 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
1965 struct btrfs_root *root,
1966 struct inode *inode, u64 new_size,
1969 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
1970 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
1971 int btrfs_writepages(struct address_space *mapping,
1972 struct writeback_control *wbc);
1973 int btrfs_create_subvol_root(struct btrfs_root *new_root, struct dentry *dentry,
1974 struct btrfs_trans_handle *trans, u64 new_dirid,
1975 struct btrfs_block_group_cache *block_group);
1977 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1978 size_t size, struct bio *bio, unsigned long bio_flags);
1980 unsigned long btrfs_force_ra(struct address_space *mapping,
1981 struct file_ra_state *ra, struct file *file,
1982 pgoff_t offset, pgoff_t last_index);
1983 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1985 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1986 int btrfs_readpage(struct file *file, struct page *page);
1987 void btrfs_delete_inode(struct inode *inode);
1988 void btrfs_put_inode(struct inode *inode);
1989 void btrfs_read_locked_inode(struct inode *inode);
1990 int btrfs_write_inode(struct inode *inode, int wait);
1991 void btrfs_dirty_inode(struct inode *inode);
1992 struct inode *btrfs_alloc_inode(struct super_block *sb);
1993 void btrfs_destroy_inode(struct inode *inode);
1994 int btrfs_init_cachep(void);
1995 void btrfs_destroy_cachep(void);
1996 long btrfs_ioctl_trans_end(struct file *file);
1997 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1998 struct btrfs_root *root, int wait);
1999 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
2000 struct btrfs_root *root);
2001 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2002 struct btrfs_root *root, int *is_new);
2003 int btrfs_commit_write(struct file *file, struct page *page,
2004 unsigned from, unsigned to);
2005 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2006 size_t page_offset, u64 start, u64 end,
2008 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2009 struct btrfs_root *root,
2010 struct inode *inode);
2011 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2012 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2013 void btrfs_orphan_cleanup(struct btrfs_root *root);
2014 int btrfs_cont_expand(struct inode *inode, loff_t size);
2017 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2020 int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
2021 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2023 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
2024 extern struct file_operations btrfs_file_operations;
2025 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
2026 struct btrfs_root *root, struct inode *inode,
2027 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
2028 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2029 struct btrfs_root *root,
2030 struct inode *inode, u64 start, u64 end);
2031 int btrfs_release_file(struct inode *inode, struct file *file);
2034 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2035 struct btrfs_root *root, int cache_only);
2038 int btrfs_init_sysfs(void);
2039 void btrfs_exit_sysfs(void);
2040 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
2041 int btrfs_sysfs_add_root(struct btrfs_root *root);
2042 void btrfs_sysfs_del_root(struct btrfs_root *root);
2043 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
2046 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
2049 u64 btrfs_parse_size(char *str);
2050 int btrfs_parse_options(struct btrfs_root *root, char *options);
2051 int btrfs_sync_fs(struct super_block *sb, int wait);
2054 int btrfs_check_acl(struct inode *inode, int mask);
2055 int btrfs_init_acl(struct inode *inode, struct inode *dir);
2056 int btrfs_acl_chmod(struct inode *inode);
2058 /* free-space-cache.c */
2059 int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
2060 u64 bytenr, u64 size);
2061 int btrfs_add_free_space_lock(struct btrfs_block_group_cache *block_group,
2062 u64 offset, u64 bytes);
2063 int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
2064 u64 bytenr, u64 size);
2065 int btrfs_remove_free_space_lock(struct btrfs_block_group_cache *block_group,
2066 u64 offset, u64 bytes);
2067 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
2069 struct btrfs_free_space *btrfs_find_free_space(struct btrfs_block_group_cache
2070 *block_group, u64 offset,
2072 void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
2074 u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group);