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/workqueue.h>
27 #include <linux/completion.h>
28 #include <asm/kmap_types.h>
29 #include "bit-radix.h"
30 #include "extent_io.h"
31 #include "extent_map.h"
33 struct btrfs_trans_handle;
34 struct btrfs_transaction;
35 extern struct kmem_cache *btrfs_trans_handle_cachep;
36 extern struct kmem_cache *btrfs_transaction_cachep;
37 extern struct kmem_cache *btrfs_bit_radix_cachep;
38 extern struct kmem_cache *btrfs_path_cachep;
40 #define BTRFS_MAGIC "_B4RfS_M"
42 #define BTRFS_MAX_LEVEL 8
44 /* holds pointers to all of the tree roots */
45 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
47 /* stores information about which extents are in use, and reference counts */
48 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
50 /* one per subvolume, storing files and directories */
51 #define BTRFS_FS_TREE_OBJECTID 3ULL
53 /* directory objectid inside the root tree */
54 #define BTRFS_ROOT_TREE_DIR_OBJECTID 4ULL
58 * chunk tree stores translations from logical -> physical block numbering
59 * the super block points to the chunk tree
61 #define BTRFS_CHUNK_TREE_OBJECTID 5ULL
64 * stores information about which areas of a given device are in use.
65 * one per device. The tree of tree roots points to the device tree
67 #define BTRFS_DEV_TREE_OBJECTID 6ULL
70 * All files have objectids higher than this.
72 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
76 * the device items go into the chunk tree. The key is in the form
77 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
79 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
82 * we can actually store much bigger names, but lets not confuse the rest
85 #define BTRFS_NAME_LEN 255
87 /* 32 bytes in various csum fields */
88 #define BTRFS_CSUM_SIZE 32
89 /* four bytes for CRC32 */
90 #define BTRFS_CRC32_SIZE 4
91 #define BTRFS_EMPTY_DIR_SIZE 0
93 #define BTRFS_FT_UNKNOWN 0
94 #define BTRFS_FT_REG_FILE 1
95 #define BTRFS_FT_DIR 2
96 #define BTRFS_FT_CHRDEV 3
97 #define BTRFS_FT_BLKDEV 4
98 #define BTRFS_FT_FIFO 5
99 #define BTRFS_FT_SOCK 6
100 #define BTRFS_FT_SYMLINK 7
101 #define BTRFS_FT_XATTR 8
102 #define BTRFS_FT_MAX 9
105 * the key defines the order in the tree, and so it also defines (optimal)
106 * block layout. objectid corresonds to the inode number. The flags
107 * tells us things about the object, and is a kind of stream selector.
108 * so for a given inode, keys with flags of 1 might refer to the inode
109 * data, flags of 2 may point to file data in the btree and flags == 3
110 * may point to extents.
112 * offset is the starting byte offset for this key in the stream.
114 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
115 * in cpu native order. Otherwise they are identical and their sizes
116 * should be the same (ie both packed)
118 struct btrfs_disk_key {
122 } __attribute__ ((__packed__));
128 } __attribute__ ((__packed__));
130 struct btrfs_mapping_tree {
131 struct extent_map_tree map_tree;
134 #define BTRFS_DEV_UUID_SIZE 16
135 struct btrfs_dev_item {
136 /* the internal btrfs device id */
139 /* size of the device */
145 /* optimal io alignment for this device */
148 /* optimal io width for this device */
151 /* minimal io size for this device */
154 /* the kernel device number */
157 /* type and info about this device */
160 /* partition number, 0 for whole dev */
163 /* length of the name data at the end of the item */
166 /* physical drive uuid (or lvm uuid) */
167 u8 uuid[BTRFS_DEV_UUID_SIZE];
169 } __attribute__ ((__packed__));
171 struct btrfs_stripe {
174 } __attribute__ ((__packed__));
181 /* optimal io alignment for this chunk */
184 /* optimal io width for this chunk */
187 /* minimal io size for this chunk */
190 /* 2^16 stripes is quite a lot, a second limit is the size of a single
194 struct btrfs_stripe stripe;
195 /* additional stripes go here */
196 } __attribute__ ((__packed__));
198 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
200 BUG_ON(num_stripes == 0);
201 return sizeof(struct btrfs_chunk) +
202 sizeof(struct btrfs_stripe) * (num_stripes - 1);
205 #define BTRFS_FSID_SIZE 16
207 * every tree block (leaf or node) starts with this header.
209 struct btrfs_header {
210 u8 csum[BTRFS_CSUM_SIZE];
211 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
212 __le64 bytenr; /* which block this node is supposed to live in */
218 } __attribute__ ((__packed__));
220 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
221 sizeof(struct btrfs_header)) / \
222 sizeof(struct btrfs_key_ptr))
223 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
224 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
225 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
226 sizeof(struct btrfs_item) - \
227 sizeof(struct btrfs_file_extent_item))
231 * this is a very generous portion of the super block, giving us
232 * room to translate 14 chunks with 3 stripes each.
234 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
237 * the super block basically lists the main trees of the FS
238 * it currently lacks any block count etc etc
240 struct btrfs_super_block {
241 u8 csum[BTRFS_CSUM_SIZE];
242 /* the first 3 fields must match struct btrfs_header */
243 u8 fsid[16]; /* FS specific uuid */
244 __le64 bytenr; /* this block number */
251 __le64 root_dir_objectid;
256 __le32 sys_chunk_array_size;
259 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
260 } __attribute__ ((__packed__));
263 * A leaf is full of items. offset and size tell us where to find
264 * the item in the leaf (relative to the start of the data area)
267 struct btrfs_disk_key key;
270 } __attribute__ ((__packed__));
273 * leaves have an item area and a data area:
274 * [item0, item1....itemN] [free space] [dataN...data1, data0]
276 * The data is separate from the items to get the keys closer together
280 struct btrfs_header header;
281 struct btrfs_item items[];
282 } __attribute__ ((__packed__));
285 * all non-leaf blocks are nodes, they hold only keys and pointers to
288 struct btrfs_key_ptr {
289 struct btrfs_disk_key key;
292 } __attribute__ ((__packed__));
295 struct btrfs_header header;
296 struct btrfs_key_ptr ptrs[];
297 } __attribute__ ((__packed__));
300 * btrfs_paths remember the path taken from the root down to the leaf.
301 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
302 * to any other levels that are present.
304 * The slots array records the index of the item or block pointer
305 * used while walking the tree.
308 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
309 int slots[BTRFS_MAX_LEVEL];
315 * items in the extent btree are used to record the objectid of the
316 * owner of the block and the number of references
318 struct btrfs_extent_item {
320 } __attribute__ ((__packed__));
322 struct btrfs_extent_ref {
327 } __attribute__ ((__packed__));
329 /* dev extents record free space on individual devices. The owner
330 * field points back to the chunk allocation mapping tree that allocated
333 struct btrfs_dev_extent {
336 } __attribute__ ((__packed__));
339 struct btrfs_inode_ref {
342 } __attribute__ ((__packed__));
344 struct btrfs_timespec {
347 } __attribute__ ((__packed__));
350 * there is no padding here on purpose. If you want to extent the inode,
351 * make a new item type
353 struct btrfs_inode_item {
365 struct btrfs_timespec atime;
366 struct btrfs_timespec ctime;
367 struct btrfs_timespec mtime;
368 struct btrfs_timespec otime;
369 } __attribute__ ((__packed__));
371 struct btrfs_dir_item {
372 struct btrfs_disk_key location;
376 } __attribute__ ((__packed__));
378 struct btrfs_root_item {
379 struct btrfs_inode_item inode;
386 struct btrfs_disk_key drop_progress;
389 } __attribute__ ((__packed__));
391 #define BTRFS_FILE_EXTENT_REG 0
392 #define BTRFS_FILE_EXTENT_INLINE 1
394 struct btrfs_file_extent_item {
398 * disk space consumed by the extent, checksum blocks are included
402 __le64 disk_num_bytes;
404 * the logical offset in file blocks (no csums)
405 * this extent record is for. This allows a file extent to point
406 * into the middle of an existing extent on disk, sharing it
407 * between two snapshots (useful if some bytes in the middle of the
408 * extent have changed
412 * the logical number of file blocks (no csums included)
415 } __attribute__ ((__packed__));
417 struct btrfs_csum_item {
419 } __attribute__ ((__packed__));
421 /* different types of block groups (and chunks) */
422 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
423 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
424 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
427 struct btrfs_block_group_item {
430 __le64 chunk_objectid;
432 } __attribute__ ((__packed__));
434 struct btrfs_space_info {
440 struct list_head list;
443 struct btrfs_block_group_cache {
444 struct btrfs_key key;
445 struct btrfs_block_group_item item;
446 struct btrfs_space_info *space_info;
453 struct btrfs_fs_info {
454 u8 fsid[BTRFS_FSID_SIZE];
455 struct btrfs_root *extent_root;
456 struct btrfs_root *tree_root;
457 struct btrfs_root *chunk_root;
458 struct btrfs_root *dev_root;
459 struct radix_tree_root fs_roots_radix;
461 struct extent_io_tree free_space_cache;
462 struct extent_io_tree block_group_cache;
463 struct extent_io_tree pinned_extents;
464 struct extent_io_tree pending_del;
465 struct extent_io_tree extent_ins;
467 /* logical->physical extent mapping */
468 struct btrfs_mapping_tree mapping_tree;
471 u64 last_trans_committed;
472 unsigned long mount_opt;
476 struct btrfs_transaction *running_transaction;
477 struct btrfs_super_block super_copy;
478 struct extent_buffer *sb_buffer;
479 struct block_device *__bdev;
480 struct super_block *sb;
481 struct inode *btree_inode;
482 spinlock_t hash_lock;
483 struct mutex trans_mutex;
484 struct mutex fs_mutex;
485 struct list_head trans_list;
486 struct list_head hashers;
487 struct list_head dead_roots;
488 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
489 struct work_struct trans_work;
491 struct delayed_work trans_work;
493 struct kobject super_kobj;
494 struct completion kobj_unregister;
497 unsigned long throttles;
500 struct list_head dirty_cowonly_roots;
502 struct list_head devices;
503 struct list_head space_info;
504 spinlock_t delalloc_lock;
505 spinlock_t new_trans_lock;
512 * in ram representation of the tree. extent_root is used for all allocations
513 * and for the extent tree extent_root root.
516 struct extent_buffer *node;
517 struct extent_buffer *commit_root;
518 struct btrfs_root_item root_item;
519 struct btrfs_key root_key;
520 struct btrfs_fs_info *fs_info;
522 struct kobject root_kobj;
523 struct completion kobj_unregister;
527 /* data allocations are done in sectorsize units */
530 /* node allocations are done in nodesize units */
533 /* leaf allocations are done in leafsize units */
540 u64 last_inode_alloc;
543 struct btrfs_key defrag_progress;
549 /* the dirty list is only used by non-reference counted roots */
550 struct list_head dirty_list;
555 * inode items have the data typically returned from stat and store other
556 * info about object characteristics. There is one for every file and dir in
559 #define BTRFS_INODE_ITEM_KEY 1
560 #define BTRFS_INODE_REF_KEY 2
561 #define BTRFS_XATTR_ITEM_KEY 8
562 /* reserve 2-15 close to the inode for later flexibility */
565 * dir items are the name -> inode pointers in a directory. There is one
566 * for every name in a directory.
568 #define BTRFS_DIR_ITEM_KEY 16
569 #define BTRFS_DIR_INDEX_KEY 17
571 * extent data is for file data
573 #define BTRFS_EXTENT_DATA_KEY 18
575 * csum items have the checksums for data in the extents
577 #define BTRFS_CSUM_ITEM_KEY 19
579 /* reserve 20-31 for other file stuff */
582 * root items point to tree roots. There are typically in the root
583 * tree used by the super block to find all the other trees
585 #define BTRFS_ROOT_ITEM_KEY 32
587 * extent items are in the extent map tree. These record which blocks
588 * are used, and how many references there are to each block
590 #define BTRFS_EXTENT_ITEM_KEY 33
591 #define BTRFS_EXTENT_REF_KEY 34
594 * block groups give us hints into the extent allocation trees. Which
595 * blocks are free etc etc
597 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
599 #define BTRFS_DEV_EXTENT_KEY 75
600 #define BTRFS_DEV_ITEM_KEY 76
601 #define BTRFS_CHUNK_ITEM_KEY 77
604 * string items are for debugging. They just store a short string of
607 #define BTRFS_STRING_ITEM_KEY 253
609 #define BTRFS_MOUNT_NODATASUM (1 << 0)
610 #define BTRFS_MOUNT_NODATACOW (1 << 1)
611 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
612 #define BTRFS_MOUNT_SSD (1 << 3)
614 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
615 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
616 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
621 #define BTRFS_INODE_NODATASUM (1 << 0)
622 #define BTRFS_INODE_NODATACOW (1 << 1)
623 #define BTRFS_INODE_READONLY (1 << 2)
624 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
626 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
628 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
630 /* some macros to generate set/get funcs for the struct fields. This
631 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
634 #define le8_to_cpu(v) (v)
635 #define cpu_to_le8(v) (v)
638 #define read_eb_member(eb, ptr, type, member, result) ( \
639 read_extent_buffer(eb, (char *)(result), \
640 ((unsigned long)(ptr)) + \
641 offsetof(type, member), \
642 sizeof(((type *)0)->member)))
644 #define write_eb_member(eb, ptr, type, member, result) ( \
645 write_extent_buffer(eb, (char *)(result), \
646 ((unsigned long)(ptr)) + \
647 offsetof(type, member), \
648 sizeof(((type *)0)->member)))
650 #ifndef BTRFS_SETGET_FUNCS
651 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
652 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
653 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
656 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
657 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
659 type *p = kmap_atomic(eb->first_page, KM_USER0); \
660 u##bits res = le##bits##_to_cpu(p->member); \
661 kunmap_atomic(p, KM_USER0); \
664 static inline void btrfs_set_##name(struct extent_buffer *eb, \
667 type *p = kmap_atomic(eb->first_page, KM_USER0); \
668 p->member = cpu_to_le##bits(val); \
669 kunmap_atomic(p, KM_USER0); \
672 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
673 static inline u##bits btrfs_##name(type *s) \
675 return le##bits##_to_cpu(s->member); \
677 static inline void btrfs_set_##name(type *s, u##bits val) \
679 s->member = cpu_to_le##bits(val); \
682 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
683 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
684 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
685 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
686 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
687 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
688 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
689 BTRFS_SETGET_FUNCS(device_rdev, struct btrfs_dev_item, rdev, 64);
690 BTRFS_SETGET_FUNCS(device_partition, struct btrfs_dev_item, partition, 32);
691 BTRFS_SETGET_FUNCS(device_name_len, struct btrfs_dev_item, name_len, 16);
693 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
695 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
698 static inline char *btrfs_device_name(struct btrfs_dev_item *d)
700 return (char *)(d + 1);
703 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
704 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
705 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
706 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
707 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
708 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
709 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
710 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
711 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
713 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
714 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
716 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
718 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
720 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
722 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
723 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
725 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
726 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
728 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
731 unsigned long offset = (unsigned long)c;
732 offset += offsetof(struct btrfs_chunk, stripe);
733 offset += nr * sizeof(struct btrfs_stripe);
734 return (struct btrfs_stripe *)offset;
737 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
738 struct btrfs_chunk *c, int nr)
740 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
743 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
744 struct btrfs_chunk *c, int nr,
747 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
750 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
751 struct btrfs_chunk *c, int nr)
753 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
756 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
757 struct btrfs_chunk *c, int nr,
760 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
763 /* struct btrfs_block_group_item */
764 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
766 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
768 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_tree, struct btrfs_block_group_item,
770 BTRFS_SETGET_FUNCS(disk_block_group_chunk_tree, struct btrfs_block_group_item,
772 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
773 struct btrfs_block_group_item, chunk_objectid, 64);
774 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objecitd,
775 struct btrfs_block_group_item, chunk_objectid, 64);
776 BTRFS_SETGET_FUNCS(disk_block_group_flags,
777 struct btrfs_block_group_item, flags, 64);
778 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
779 struct btrfs_block_group_item, flags, 64);
781 /* struct btrfs_inode_ref */
782 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
784 /* struct btrfs_inode_item */
785 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
786 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
787 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
788 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
789 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
790 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
791 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
792 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
793 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
794 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
795 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
798 static inline struct btrfs_timespec *
799 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
801 unsigned long ptr = (unsigned long)inode_item;
802 ptr += offsetof(struct btrfs_inode_item, atime);
803 return (struct btrfs_timespec *)ptr;
806 static inline struct btrfs_timespec *
807 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
809 unsigned long ptr = (unsigned long)inode_item;
810 ptr += offsetof(struct btrfs_inode_item, mtime);
811 return (struct btrfs_timespec *)ptr;
814 static inline struct btrfs_timespec *
815 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
817 unsigned long ptr = (unsigned long)inode_item;
818 ptr += offsetof(struct btrfs_inode_item, ctime);
819 return (struct btrfs_timespec *)ptr;
822 static inline struct btrfs_timespec *
823 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
825 unsigned long ptr = (unsigned long)inode_item;
826 ptr += offsetof(struct btrfs_inode_item, otime);
827 return (struct btrfs_timespec *)ptr;
830 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
831 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
833 /* struct btrfs_extent_item */
834 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
836 /* struct btrfs_dev_extent */
837 BTRFS_SETGET_FUNCS(dev_extent_owner, struct btrfs_dev_extent, owner, 64);
838 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
840 /* struct btrfs_extent_ref */
841 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
842 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
843 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
844 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
846 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
847 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
849 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
851 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
853 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
856 /* struct btrfs_node */
857 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
858 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
860 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
863 ptr = offsetof(struct btrfs_node, ptrs) +
864 sizeof(struct btrfs_key_ptr) * nr;
865 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
868 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
872 ptr = offsetof(struct btrfs_node, ptrs) +
873 sizeof(struct btrfs_key_ptr) * nr;
874 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
877 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
880 ptr = offsetof(struct btrfs_node, ptrs) +
881 sizeof(struct btrfs_key_ptr) * nr;
882 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
885 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
889 ptr = offsetof(struct btrfs_node, ptrs) +
890 sizeof(struct btrfs_key_ptr) * nr;
891 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
894 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
896 return offsetof(struct btrfs_node, ptrs) +
897 sizeof(struct btrfs_key_ptr) * nr;
900 void btrfs_node_key(struct extent_buffer *eb,
901 struct btrfs_disk_key *disk_key, int nr);
903 static inline void btrfs_set_node_key(struct extent_buffer *eb,
904 struct btrfs_disk_key *disk_key, int nr)
907 ptr = btrfs_node_key_ptr_offset(nr);
908 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
909 struct btrfs_key_ptr, key, disk_key);
912 /* struct btrfs_item */
913 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
914 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
916 static inline unsigned long btrfs_item_nr_offset(int nr)
918 return offsetof(struct btrfs_leaf, items) +
919 sizeof(struct btrfs_item) * nr;
922 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
925 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
928 static inline u32 btrfs_item_end(struct extent_buffer *eb,
929 struct btrfs_item *item)
931 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
934 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
936 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
939 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
941 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
944 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
946 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
949 static inline void btrfs_item_key(struct extent_buffer *eb,
950 struct btrfs_disk_key *disk_key, int nr)
952 struct btrfs_item *item = btrfs_item_nr(eb, nr);
953 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
956 static inline void btrfs_set_item_key(struct extent_buffer *eb,
957 struct btrfs_disk_key *disk_key, int nr)
959 struct btrfs_item *item = btrfs_item_nr(eb, nr);
960 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
963 /* struct btrfs_dir_item */
964 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
965 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
966 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
968 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
969 struct btrfs_dir_item *item,
970 struct btrfs_disk_key *key)
972 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
975 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
976 struct btrfs_dir_item *item,
977 struct btrfs_disk_key *key)
979 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
982 /* struct btrfs_disk_key */
983 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
985 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
986 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
988 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
989 struct btrfs_disk_key *disk)
991 cpu->offset = le64_to_cpu(disk->offset);
992 cpu->type = disk->type;
993 cpu->objectid = le64_to_cpu(disk->objectid);
996 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
997 struct btrfs_key *cpu)
999 disk->offset = cpu_to_le64(cpu->offset);
1000 disk->type = cpu->type;
1001 disk->objectid = cpu_to_le64(cpu->objectid);
1004 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1005 struct btrfs_key *key, int nr)
1007 struct btrfs_disk_key disk_key;
1008 btrfs_node_key(eb, &disk_key, nr);
1009 btrfs_disk_key_to_cpu(key, &disk_key);
1012 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1013 struct btrfs_key *key, int nr)
1015 struct btrfs_disk_key disk_key;
1016 btrfs_item_key(eb, &disk_key, nr);
1017 btrfs_disk_key_to_cpu(key, &disk_key);
1020 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1021 struct btrfs_dir_item *item,
1022 struct btrfs_key *key)
1024 struct btrfs_disk_key disk_key;
1025 btrfs_dir_item_key(eb, item, &disk_key);
1026 btrfs_disk_key_to_cpu(key, &disk_key);
1030 static inline u8 btrfs_key_type(struct btrfs_key *key)
1035 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1040 /* struct btrfs_header */
1041 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1042 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1044 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1045 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1046 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 16);
1047 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1049 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1051 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1055 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1057 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1061 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1063 unsigned long ptr = offsetof(struct btrfs_header, csum);
1067 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1072 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1077 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1082 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1084 return (btrfs_header_level(eb) == 0);
1087 /* struct btrfs_root_item */
1088 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1089 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1090 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1092 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1093 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1094 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1095 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1096 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1097 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1098 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1100 /* struct btrfs_super_block */
1101 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1102 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1104 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1105 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1106 struct btrfs_super_block, sys_chunk_array_size, 32);
1107 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1109 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1111 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1112 chunk_root_level, 64);
1113 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1115 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1117 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1119 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1121 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1123 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1125 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1126 root_dir_objectid, 64);
1128 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1130 return offsetof(struct btrfs_leaf, items);
1133 /* struct btrfs_file_extent_item */
1134 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1136 static inline unsigned long btrfs_file_extent_inline_start(struct
1137 btrfs_file_extent_item *e)
1139 unsigned long offset = (unsigned long)e;
1140 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1144 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1146 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1149 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1150 struct btrfs_item *e)
1152 unsigned long offset;
1153 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1154 return btrfs_item_size(eb, e) - offset;
1157 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1159 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1161 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1162 disk_num_bytes, 64);
1163 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1165 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1168 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1170 return sb->s_fs_info;
1173 static inline int btrfs_set_root_name(struct btrfs_root *root,
1174 const char *name, int len)
1176 /* if we already have a name just free it */
1180 root->name = kmalloc(len+1, GFP_KERNEL);
1184 memcpy(root->name, name, len);
1185 root->name[len] ='\0';
1190 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1192 return root->leafsize;
1193 return root->nodesize;
1196 /* helper function to cast into the data area of the leaf. */
1197 #define btrfs_item_ptr(leaf, slot, type) \
1198 ((type *)(btrfs_leaf_data(leaf) + \
1199 btrfs_item_offset_nr(leaf, slot)))
1201 #define btrfs_item_ptr_offset(leaf, slot) \
1202 ((unsigned long)(btrfs_leaf_data(leaf) + \
1203 btrfs_item_offset_nr(leaf, slot)))
1205 static inline struct dentry *fdentry(struct file *file) {
1206 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1207 return file->f_dentry;
1209 return file->f_path.dentry;
1214 u32 btrfs_count_snapshots_in_path(struct btrfs_root *root,
1215 struct btrfs_path *count_path,
1217 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1218 struct btrfs_root *root);
1219 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1220 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1221 btrfs_fs_info *info,
1223 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1224 struct btrfs_block_group_cache
1225 *hint, u64 search_start,
1226 int data, int owner);
1227 int btrfs_inc_root_ref(struct btrfs_trans_handle *trans,
1228 struct btrfs_root *root, u64 owner_objectid);
1229 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1230 struct btrfs_root *root, u32 size,
1232 u64 hint, u64 empty_size);
1233 struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1234 struct btrfs_root *root,
1242 int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans,
1243 struct btrfs_root *root, u64 new_size);
1244 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1245 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1246 struct btrfs_root *root,
1247 struct btrfs_path *path, u64 bytenr,
1248 u64 root_objectid, u64 ref_generation,
1249 u64 owner, u64 owner_offset);
1250 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1251 struct btrfs_root *root,
1252 u64 num_bytes, u64 root_objectid, u64 ref_generation,
1253 u64 owner, u64 owner_offset,
1254 u64 empty_size, u64 hint_byte,
1255 u64 search_end, struct btrfs_key *ins, int data);
1256 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1257 struct extent_buffer *buf);
1258 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1259 *root, u64 bytenr, u64 num_bytes,
1260 u64 root_objectid, u64 ref_generation,
1261 u64 owner_objectid, u64 owner_offset, int pin);
1262 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1263 struct btrfs_root *root,
1264 struct extent_io_tree *unpin);
1265 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1266 struct btrfs_root *root,
1267 u64 bytenr, u64 num_bytes,
1268 u64 root_objectid, u64 ref_generation,
1269 u64 owner, u64 owner_offset);
1270 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1271 struct btrfs_root *root);
1272 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1273 int btrfs_read_block_groups(struct btrfs_root *root);
1274 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1275 struct btrfs_root *root, u64 bytes_used,
1276 u64 type, u64 chunk_tree, u64 chunk_objectid,
1279 int btrfs_previous_item(struct btrfs_root *root,
1280 struct btrfs_path *path, u64 min_objectid,
1282 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1283 struct btrfs_root *root, struct extent_buffer *buf,
1284 struct extent_buffer *parent, int parent_slot,
1285 struct extent_buffer **cow_ret);
1286 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1287 struct btrfs_root *root,
1288 struct extent_buffer *buf,
1289 struct extent_buffer **cow_ret, u64 new_root_objectid);
1290 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1291 *root, struct btrfs_path *path, u32 data_size);
1292 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1293 struct btrfs_root *root,
1294 struct btrfs_path *path,
1295 u32 new_size, int from_end);
1296 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1297 *root, struct btrfs_key *key, struct btrfs_path *p, int
1299 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1300 struct btrfs_root *root, struct extent_buffer *parent,
1301 int start_slot, int cache_only, u64 *last_ret,
1302 struct btrfs_key *progress);
1303 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1304 struct btrfs_path *btrfs_alloc_path(void);
1305 void btrfs_free_path(struct btrfs_path *p);
1306 void btrfs_init_path(struct btrfs_path *p);
1307 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1308 struct btrfs_path *path, int slot, int nr);
1310 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1311 struct btrfs_root *root,
1312 struct btrfs_path *path)
1314 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1317 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1318 *root, struct btrfs_key *key, void *data, u32 data_size);
1319 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1320 struct btrfs_root *root,
1321 struct btrfs_path *path,
1322 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1324 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1325 struct btrfs_root *root,
1326 struct btrfs_path *path,
1327 struct btrfs_key *key,
1330 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1333 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1334 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1335 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1336 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1339 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1340 struct btrfs_key *key);
1341 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1342 *root, struct btrfs_key *key, struct btrfs_root_item
1344 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1345 *root, struct btrfs_key *key, struct btrfs_root_item
1347 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1348 btrfs_root_item *item, struct btrfs_key *key);
1349 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1350 struct btrfs_root *latest_root);
1352 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1353 *root, const char *name, int name_len, u64 dir,
1354 struct btrfs_key *location, u8 type);
1355 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1356 struct btrfs_root *root,
1357 struct btrfs_path *path, u64 dir,
1358 const char *name, int name_len,
1360 struct btrfs_dir_item *
1361 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1362 struct btrfs_root *root,
1363 struct btrfs_path *path, u64 dir,
1364 u64 objectid, const char *name, int name_len,
1366 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1367 struct btrfs_path *path,
1368 const char *name, int name_len);
1369 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1370 struct btrfs_root *root,
1371 struct btrfs_path *path,
1372 struct btrfs_dir_item *di);
1373 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1374 struct btrfs_root *root, const char *name,
1375 u16 name_len, const void *data, u16 data_len,
1377 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1378 struct btrfs_root *root,
1379 struct btrfs_path *path, u64 dir,
1380 const char *name, u16 name_len,
1383 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1384 struct btrfs_root *fs_root,
1385 u64 dirid, u64 *objectid);
1386 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1389 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1390 struct btrfs_root *root,
1391 const char *name, int name_len,
1392 u64 inode_objectid, u64 ref_objectid);
1393 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1394 struct btrfs_root *root,
1395 const char *name, int name_len,
1396 u64 inode_objectid, u64 ref_objectid);
1397 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1398 struct btrfs_root *root,
1399 struct btrfs_path *path, u64 objectid);
1400 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1401 *root, struct btrfs_path *path,
1402 struct btrfs_key *location, int mod);
1405 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1406 struct btrfs_root *root,
1407 u64 objectid, u64 pos, u64 offset,
1410 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1411 struct btrfs_root *root,
1412 struct btrfs_path *path, u64 objectid,
1413 u64 bytenr, int mod);
1414 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1415 struct btrfs_root *root, struct inode *inode,
1417 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1418 struct btrfs_root *root,
1419 struct btrfs_path *path,
1420 u64 objectid, u64 offset,
1422 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1423 struct btrfs_root *root, struct btrfs_path *path,
1426 static inline void dec_i_blocks(struct inode *inode, u64 dec)
1429 if (dec <= inode->i_blocks)
1430 inode->i_blocks -= dec;
1432 inode->i_blocks = 0;
1435 unsigned long btrfs_force_ra(struct address_space *mapping,
1436 struct file_ra_state *ra, struct file *file,
1437 pgoff_t offset, pgoff_t last_index);
1438 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1440 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1441 int btrfs_readpage(struct file *file, struct page *page);
1442 void btrfs_delete_inode(struct inode *inode);
1443 void btrfs_put_inode(struct inode *inode);
1444 void btrfs_read_locked_inode(struct inode *inode);
1445 int btrfs_write_inode(struct inode *inode, int wait);
1446 void btrfs_dirty_inode(struct inode *inode);
1447 struct inode *btrfs_alloc_inode(struct super_block *sb);
1448 void btrfs_destroy_inode(struct inode *inode);
1449 int btrfs_init_cachep(void);
1450 void btrfs_destroy_cachep(void);
1451 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1452 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1453 struct btrfs_root *root);
1454 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1456 int btrfs_commit_write(struct file *file, struct page *page,
1457 unsigned from, unsigned to);
1458 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1459 size_t page_offset, u64 start, u64 end,
1461 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1462 struct btrfs_root *root,
1463 struct inode *inode);
1465 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
1466 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1467 extern struct file_operations btrfs_file_operations;
1468 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1469 struct btrfs_root *root, struct inode *inode,
1470 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1472 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1473 struct btrfs_root *root, int cache_only);
1476 int btrfs_init_sysfs(void);
1477 void btrfs_exit_sysfs(void);
1478 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1479 int btrfs_sysfs_add_root(struct btrfs_root *root);
1480 void btrfs_sysfs_del_root(struct btrfs_root *root);
1481 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1484 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1485 int btrfs_delete_xattrs(struct btrfs_trans_handle *trans,
1486 struct btrfs_root *root, struct inode *inode);
1488 u64 btrfs_parse_size(char *str);