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_block_group_cache {
435 struct btrfs_key key;
436 struct btrfs_block_group_item item;
443 struct btrfs_fs_info {
444 u8 fsid[BTRFS_FSID_SIZE];
445 struct btrfs_root *extent_root;
446 struct btrfs_root *tree_root;
447 struct btrfs_root *chunk_root;
448 struct btrfs_root *dev_root;
449 struct radix_tree_root fs_roots_radix;
451 struct extent_io_tree free_space_cache;
452 struct extent_io_tree block_group_cache;
453 struct extent_io_tree pinned_extents;
454 struct extent_io_tree pending_del;
455 struct extent_io_tree extent_ins;
457 /* logical->physical extent mapping */
458 struct btrfs_mapping_tree mapping_tree;
461 u64 last_trans_committed;
462 unsigned long mount_opt;
466 struct btrfs_transaction *running_transaction;
467 struct btrfs_super_block super_copy;
468 struct extent_buffer *sb_buffer;
469 struct block_device *__bdev;
470 struct super_block *sb;
471 struct inode *btree_inode;
472 spinlock_t hash_lock;
473 struct mutex trans_mutex;
474 struct mutex fs_mutex;
475 struct list_head trans_list;
476 struct list_head hashers;
477 struct list_head dead_roots;
478 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
479 struct work_struct trans_work;
481 struct delayed_work trans_work;
483 struct kobject super_kobj;
484 struct completion kobj_unregister;
487 unsigned long throttles;
490 struct list_head dirty_cowonly_roots;
492 struct list_head devices;
493 struct list_head *last_device;
494 spinlock_t delalloc_lock;
495 spinlock_t new_trans_lock;
502 * in ram representation of the tree. extent_root is used for all allocations
503 * and for the extent tree extent_root root.
506 struct extent_buffer *node;
507 struct extent_buffer *commit_root;
508 struct btrfs_root_item root_item;
509 struct btrfs_key root_key;
510 struct btrfs_fs_info *fs_info;
512 struct kobject root_kobj;
513 struct completion kobj_unregister;
517 /* data allocations are done in sectorsize units */
520 /* node allocations are done in nodesize units */
523 /* leaf allocations are done in leafsize units */
530 u64 last_inode_alloc;
533 struct btrfs_key defrag_progress;
539 /* the dirty list is only used by non-reference counted roots */
540 struct list_head dirty_list;
545 * inode items have the data typically returned from stat and store other
546 * info about object characteristics. There is one for every file and dir in
549 #define BTRFS_INODE_ITEM_KEY 1
550 #define BTRFS_INODE_REF_KEY 2
551 #define BTRFS_XATTR_ITEM_KEY 8
552 /* reserve 2-15 close to the inode for later flexibility */
555 * dir items are the name -> inode pointers in a directory. There is one
556 * for every name in a directory.
558 #define BTRFS_DIR_ITEM_KEY 16
559 #define BTRFS_DIR_INDEX_KEY 17
561 * extent data is for file data
563 #define BTRFS_EXTENT_DATA_KEY 18
565 * csum items have the checksums for data in the extents
567 #define BTRFS_CSUM_ITEM_KEY 19
569 /* reserve 20-31 for other file stuff */
572 * root items point to tree roots. There are typically in the root
573 * tree used by the super block to find all the other trees
575 #define BTRFS_ROOT_ITEM_KEY 32
577 * extent items are in the extent map tree. These record which blocks
578 * are used, and how many references there are to each block
580 #define BTRFS_EXTENT_ITEM_KEY 33
581 #define BTRFS_EXTENT_REF_KEY 34
584 * block groups give us hints into the extent allocation trees. Which
585 * blocks are free etc etc
587 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
589 #define BTRFS_DEV_EXTENT_KEY 75
590 #define BTRFS_DEV_ITEM_KEY 76
591 #define BTRFS_CHUNK_ITEM_KEY 77
594 * string items are for debugging. They just store a short string of
597 #define BTRFS_STRING_ITEM_KEY 253
599 #define BTRFS_MOUNT_NODATASUM (1 << 0)
600 #define BTRFS_MOUNT_NODATACOW (1 << 1)
601 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
602 #define BTRFS_MOUNT_SSD (1 << 3)
604 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
605 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
606 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
611 #define BTRFS_INODE_NODATASUM (1 << 0)
612 #define BTRFS_INODE_NODATACOW (1 << 1)
613 #define BTRFS_INODE_READONLY (1 << 2)
614 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
616 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
618 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
620 /* some macros to generate set/get funcs for the struct fields. This
621 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
624 #define le8_to_cpu(v) (v)
625 #define cpu_to_le8(v) (v)
628 #define read_eb_member(eb, ptr, type, member, result) ( \
629 read_extent_buffer(eb, (char *)(result), \
630 ((unsigned long)(ptr)) + \
631 offsetof(type, member), \
632 sizeof(((type *)0)->member)))
634 #define write_eb_member(eb, ptr, type, member, result) ( \
635 write_extent_buffer(eb, (char *)(result), \
636 ((unsigned long)(ptr)) + \
637 offsetof(type, member), \
638 sizeof(((type *)0)->member)))
640 #ifndef BTRFS_SETGET_FUNCS
641 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
642 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
643 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
646 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
647 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
649 type *p = kmap_atomic(eb->first_page, KM_USER0); \
650 u##bits res = le##bits##_to_cpu(p->member); \
651 kunmap_atomic(p, KM_USER0); \
654 static inline void btrfs_set_##name(struct extent_buffer *eb, \
657 type *p = kmap_atomic(eb->first_page, KM_USER0); \
658 p->member = cpu_to_le##bits(val); \
659 kunmap_atomic(p, KM_USER0); \
662 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
663 static inline u##bits btrfs_##name(type *s) \
665 return le##bits##_to_cpu(s->member); \
667 static inline void btrfs_set_##name(type *s, u##bits val) \
669 s->member = cpu_to_le##bits(val); \
672 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
673 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
674 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
675 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
676 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
677 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
678 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
679 BTRFS_SETGET_FUNCS(device_rdev, struct btrfs_dev_item, rdev, 64);
680 BTRFS_SETGET_FUNCS(device_partition, struct btrfs_dev_item, partition, 32);
681 BTRFS_SETGET_FUNCS(device_name_len, struct btrfs_dev_item, name_len, 16);
683 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
685 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
688 static inline char *btrfs_device_name(struct btrfs_dev_item *d)
690 return (char *)(d + 1);
693 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
694 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
695 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
696 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
697 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
698 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
699 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
700 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
701 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
703 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
704 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
706 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
708 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
710 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
712 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
713 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
715 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
716 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
718 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
721 unsigned long offset = (unsigned long)c;
722 offset += offsetof(struct btrfs_chunk, stripe);
723 offset += nr * sizeof(struct btrfs_stripe);
724 return (struct btrfs_stripe *)offset;
727 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
728 struct btrfs_chunk *c, int nr)
730 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
733 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
734 struct btrfs_chunk *c, int nr,
737 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
740 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
741 struct btrfs_chunk *c, int nr)
743 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
746 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
747 struct btrfs_chunk *c, int nr,
750 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
753 /* struct btrfs_block_group_item */
754 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
756 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
758 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_tree, struct btrfs_block_group_item,
760 BTRFS_SETGET_FUNCS(disk_block_group_chunk_tree, struct btrfs_block_group_item,
762 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
763 struct btrfs_block_group_item, chunk_objectid, 64);
764 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objecitd,
765 struct btrfs_block_group_item, chunk_objectid, 64);
766 BTRFS_SETGET_FUNCS(disk_block_group_flags,
767 struct btrfs_block_group_item, flags, 64);
768 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
769 struct btrfs_block_group_item, flags, 64);
771 /* struct btrfs_inode_ref */
772 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
774 /* struct btrfs_inode_item */
775 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
776 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
777 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
778 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
779 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
780 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
781 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
782 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
783 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
784 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
785 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
788 static inline struct btrfs_timespec *
789 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
791 unsigned long ptr = (unsigned long)inode_item;
792 ptr += offsetof(struct btrfs_inode_item, atime);
793 return (struct btrfs_timespec *)ptr;
796 static inline struct btrfs_timespec *
797 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
799 unsigned long ptr = (unsigned long)inode_item;
800 ptr += offsetof(struct btrfs_inode_item, mtime);
801 return (struct btrfs_timespec *)ptr;
804 static inline struct btrfs_timespec *
805 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
807 unsigned long ptr = (unsigned long)inode_item;
808 ptr += offsetof(struct btrfs_inode_item, ctime);
809 return (struct btrfs_timespec *)ptr;
812 static inline struct btrfs_timespec *
813 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
815 unsigned long ptr = (unsigned long)inode_item;
816 ptr += offsetof(struct btrfs_inode_item, otime);
817 return (struct btrfs_timespec *)ptr;
820 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
821 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
823 /* struct btrfs_extent_item */
824 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
826 /* struct btrfs_dev_extent */
827 BTRFS_SETGET_FUNCS(dev_extent_owner, struct btrfs_dev_extent, owner, 64);
828 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
830 /* struct btrfs_extent_ref */
831 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
832 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
833 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
834 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
836 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
837 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
839 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
841 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
843 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
846 /* struct btrfs_node */
847 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
848 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
850 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
853 ptr = offsetof(struct btrfs_node, ptrs) +
854 sizeof(struct btrfs_key_ptr) * nr;
855 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
858 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
862 ptr = offsetof(struct btrfs_node, ptrs) +
863 sizeof(struct btrfs_key_ptr) * nr;
864 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
867 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
870 ptr = offsetof(struct btrfs_node, ptrs) +
871 sizeof(struct btrfs_key_ptr) * nr;
872 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
875 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
879 ptr = offsetof(struct btrfs_node, ptrs) +
880 sizeof(struct btrfs_key_ptr) * nr;
881 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
884 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
886 return offsetof(struct btrfs_node, ptrs) +
887 sizeof(struct btrfs_key_ptr) * nr;
890 void btrfs_node_key(struct extent_buffer *eb,
891 struct btrfs_disk_key *disk_key, int nr);
893 static inline void btrfs_set_node_key(struct extent_buffer *eb,
894 struct btrfs_disk_key *disk_key, int nr)
897 ptr = btrfs_node_key_ptr_offset(nr);
898 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
899 struct btrfs_key_ptr, key, disk_key);
902 /* struct btrfs_item */
903 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
904 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
906 static inline unsigned long btrfs_item_nr_offset(int nr)
908 return offsetof(struct btrfs_leaf, items) +
909 sizeof(struct btrfs_item) * nr;
912 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
915 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
918 static inline u32 btrfs_item_end(struct extent_buffer *eb,
919 struct btrfs_item *item)
921 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
924 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
926 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
929 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
931 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
934 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
936 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
939 static inline void btrfs_item_key(struct extent_buffer *eb,
940 struct btrfs_disk_key *disk_key, int nr)
942 struct btrfs_item *item = btrfs_item_nr(eb, nr);
943 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
946 static inline void btrfs_set_item_key(struct extent_buffer *eb,
947 struct btrfs_disk_key *disk_key, int nr)
949 struct btrfs_item *item = btrfs_item_nr(eb, nr);
950 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
953 /* struct btrfs_dir_item */
954 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
955 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
956 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
958 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
959 struct btrfs_dir_item *item,
960 struct btrfs_disk_key *key)
962 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
965 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
966 struct btrfs_dir_item *item,
967 struct btrfs_disk_key *key)
969 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
972 /* struct btrfs_disk_key */
973 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
975 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
976 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
978 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
979 struct btrfs_disk_key *disk)
981 cpu->offset = le64_to_cpu(disk->offset);
982 cpu->type = disk->type;
983 cpu->objectid = le64_to_cpu(disk->objectid);
986 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
987 struct btrfs_key *cpu)
989 disk->offset = cpu_to_le64(cpu->offset);
990 disk->type = cpu->type;
991 disk->objectid = cpu_to_le64(cpu->objectid);
994 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
995 struct btrfs_key *key, int nr)
997 struct btrfs_disk_key disk_key;
998 btrfs_node_key(eb, &disk_key, nr);
999 btrfs_disk_key_to_cpu(key, &disk_key);
1002 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1003 struct btrfs_key *key, int nr)
1005 struct btrfs_disk_key disk_key;
1006 btrfs_item_key(eb, &disk_key, nr);
1007 btrfs_disk_key_to_cpu(key, &disk_key);
1010 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1011 struct btrfs_dir_item *item,
1012 struct btrfs_key *key)
1014 struct btrfs_disk_key disk_key;
1015 btrfs_dir_item_key(eb, item, &disk_key);
1016 btrfs_disk_key_to_cpu(key, &disk_key);
1020 static inline u8 btrfs_key_type(struct btrfs_key *key)
1025 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1030 /* struct btrfs_header */
1031 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1032 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1034 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1035 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1036 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 16);
1037 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1039 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1041 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1045 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1047 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1051 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1053 unsigned long ptr = offsetof(struct btrfs_header, csum);
1057 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1062 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1067 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1072 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1074 return (btrfs_header_level(eb) == 0);
1077 /* struct btrfs_root_item */
1078 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1079 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1080 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1082 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1083 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1084 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1085 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1086 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1087 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1088 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1090 /* struct btrfs_super_block */
1091 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1092 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1094 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1095 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1096 struct btrfs_super_block, sys_chunk_array_size, 32);
1097 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1099 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1101 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1102 chunk_root_level, 64);
1103 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1105 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1107 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1109 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1111 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1113 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1115 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1116 root_dir_objectid, 64);
1118 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1120 return offsetof(struct btrfs_leaf, items);
1123 /* struct btrfs_file_extent_item */
1124 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1126 static inline unsigned long btrfs_file_extent_inline_start(struct
1127 btrfs_file_extent_item *e)
1129 unsigned long offset = (unsigned long)e;
1130 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1134 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1136 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1139 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1140 struct btrfs_item *e)
1142 unsigned long offset;
1143 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1144 return btrfs_item_size(eb, e) - offset;
1147 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1149 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1151 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1152 disk_num_bytes, 64);
1153 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1155 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1158 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1160 return sb->s_fs_info;
1163 static inline int btrfs_set_root_name(struct btrfs_root *root,
1164 const char *name, int len)
1166 /* if we already have a name just free it */
1170 root->name = kmalloc(len+1, GFP_KERNEL);
1174 memcpy(root->name, name, len);
1175 root->name[len] ='\0';
1180 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1182 return root->leafsize;
1183 return root->nodesize;
1186 /* helper function to cast into the data area of the leaf. */
1187 #define btrfs_item_ptr(leaf, slot, type) \
1188 ((type *)(btrfs_leaf_data(leaf) + \
1189 btrfs_item_offset_nr(leaf, slot)))
1191 #define btrfs_item_ptr_offset(leaf, slot) \
1192 ((unsigned long)(btrfs_leaf_data(leaf) + \
1193 btrfs_item_offset_nr(leaf, slot)))
1195 static inline struct dentry *fdentry(struct file *file) {
1196 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1197 return file->f_dentry;
1199 return file->f_path.dentry;
1204 u32 btrfs_count_snapshots_in_path(struct btrfs_root *root,
1205 struct btrfs_path *count_path,
1207 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1208 struct btrfs_root *root);
1209 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1210 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1211 btrfs_fs_info *info,
1213 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1214 struct btrfs_block_group_cache
1215 *hint, u64 search_start,
1216 int data, int owner);
1217 int btrfs_inc_root_ref(struct btrfs_trans_handle *trans,
1218 struct btrfs_root *root, u64 owner_objectid);
1219 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1220 struct btrfs_root *root, u32 size,
1222 u64 hint, u64 empty_size);
1223 struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1224 struct btrfs_root *root,
1232 int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans,
1233 struct btrfs_root *root, u64 new_size);
1234 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1235 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1236 struct btrfs_root *root,
1237 struct btrfs_path *path, u64 bytenr,
1238 u64 root_objectid, u64 ref_generation,
1239 u64 owner, u64 owner_offset);
1240 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1241 struct btrfs_root *root,
1242 u64 num_bytes, u64 root_objectid, u64 ref_generation,
1243 u64 owner, u64 owner_offset,
1244 u64 empty_size, u64 hint_byte,
1245 u64 search_end, struct btrfs_key *ins, int data);
1246 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1247 struct extent_buffer *buf);
1248 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1249 *root, u64 bytenr, u64 num_bytes,
1250 u64 root_objectid, u64 ref_generation,
1251 u64 owner_objectid, u64 owner_offset, int pin);
1252 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1253 struct btrfs_root *root,
1254 struct extent_io_tree *unpin);
1255 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1256 struct btrfs_root *root,
1257 u64 bytenr, u64 num_bytes,
1258 u64 root_objectid, u64 ref_generation,
1259 u64 owner, u64 owner_offset);
1260 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1261 struct btrfs_root *root);
1262 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1263 int btrfs_read_block_groups(struct btrfs_root *root);
1264 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1265 struct btrfs_root *root, u64 bytes_used,
1266 u64 type, u64 chunk_tree, u64 chunk_objectid,
1269 int btrfs_previous_item(struct btrfs_root *root,
1270 struct btrfs_path *path, u64 min_objectid,
1272 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1273 struct btrfs_root *root, struct extent_buffer *buf,
1274 struct extent_buffer *parent, int parent_slot,
1275 struct extent_buffer **cow_ret);
1276 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1277 struct btrfs_root *root,
1278 struct extent_buffer *buf,
1279 struct extent_buffer **cow_ret, u64 new_root_objectid);
1280 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1281 *root, struct btrfs_path *path, u32 data_size);
1282 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1283 struct btrfs_root *root,
1284 struct btrfs_path *path,
1285 u32 new_size, int from_end);
1286 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1287 *root, struct btrfs_key *key, struct btrfs_path *p, int
1289 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1290 struct btrfs_root *root, struct extent_buffer *parent,
1291 int start_slot, int cache_only, u64 *last_ret,
1292 struct btrfs_key *progress);
1293 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1294 struct btrfs_path *btrfs_alloc_path(void);
1295 void btrfs_free_path(struct btrfs_path *p);
1296 void btrfs_init_path(struct btrfs_path *p);
1297 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1298 struct btrfs_path *path, int slot, int nr);
1300 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1301 struct btrfs_root *root,
1302 struct btrfs_path *path)
1304 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1307 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1308 *root, struct btrfs_key *key, void *data, u32 data_size);
1309 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1310 struct btrfs_root *root,
1311 struct btrfs_path *path,
1312 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1314 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1315 struct btrfs_root *root,
1316 struct btrfs_path *path,
1317 struct btrfs_key *key,
1320 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1323 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1324 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1325 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1326 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1329 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1330 struct btrfs_key *key);
1331 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1332 *root, struct btrfs_key *key, struct btrfs_root_item
1334 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1335 *root, struct btrfs_key *key, struct btrfs_root_item
1337 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1338 btrfs_root_item *item, struct btrfs_key *key);
1339 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1340 struct btrfs_root *latest_root);
1342 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1343 *root, const char *name, int name_len, u64 dir,
1344 struct btrfs_key *location, u8 type);
1345 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1346 struct btrfs_root *root,
1347 struct btrfs_path *path, u64 dir,
1348 const char *name, int name_len,
1350 struct btrfs_dir_item *
1351 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1352 struct btrfs_root *root,
1353 struct btrfs_path *path, u64 dir,
1354 u64 objectid, const char *name, int name_len,
1356 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1357 struct btrfs_path *path,
1358 const char *name, int name_len);
1359 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1360 struct btrfs_root *root,
1361 struct btrfs_path *path,
1362 struct btrfs_dir_item *di);
1363 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1364 struct btrfs_root *root, const char *name,
1365 u16 name_len, const void *data, u16 data_len,
1367 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1368 struct btrfs_root *root,
1369 struct btrfs_path *path, u64 dir,
1370 const char *name, u16 name_len,
1373 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1374 struct btrfs_root *fs_root,
1375 u64 dirid, u64 *objectid);
1376 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1379 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1380 struct btrfs_root *root,
1381 const char *name, int name_len,
1382 u64 inode_objectid, u64 ref_objectid);
1383 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1384 struct btrfs_root *root,
1385 const char *name, int name_len,
1386 u64 inode_objectid, u64 ref_objectid);
1387 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1388 struct btrfs_root *root,
1389 struct btrfs_path *path, u64 objectid);
1390 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1391 *root, struct btrfs_path *path,
1392 struct btrfs_key *location, int mod);
1395 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1396 struct btrfs_root *root,
1397 u64 objectid, u64 pos, u64 offset,
1400 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1401 struct btrfs_root *root,
1402 struct btrfs_path *path, u64 objectid,
1403 u64 bytenr, int mod);
1404 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1405 struct btrfs_root *root, struct inode *inode,
1407 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1408 struct btrfs_root *root,
1409 struct btrfs_path *path,
1410 u64 objectid, u64 offset,
1412 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1413 struct btrfs_root *root, struct btrfs_path *path,
1416 static inline void dec_i_blocks(struct inode *inode, u64 dec)
1419 if (dec <= inode->i_blocks)
1420 inode->i_blocks -= dec;
1422 inode->i_blocks = 0;
1425 unsigned long btrfs_force_ra(struct address_space *mapping,
1426 struct file_ra_state *ra, struct file *file,
1427 pgoff_t offset, pgoff_t last_index);
1428 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1430 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1431 int btrfs_readpage(struct file *file, struct page *page);
1432 void btrfs_delete_inode(struct inode *inode);
1433 void btrfs_put_inode(struct inode *inode);
1434 void btrfs_read_locked_inode(struct inode *inode);
1435 int btrfs_write_inode(struct inode *inode, int wait);
1436 void btrfs_dirty_inode(struct inode *inode);
1437 struct inode *btrfs_alloc_inode(struct super_block *sb);
1438 void btrfs_destroy_inode(struct inode *inode);
1439 int btrfs_init_cachep(void);
1440 void btrfs_destroy_cachep(void);
1441 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1442 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1443 struct btrfs_root *root);
1444 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1446 int btrfs_commit_write(struct file *file, struct page *page,
1447 unsigned from, unsigned to);
1448 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1449 size_t page_offset, u64 start, u64 end,
1451 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1452 struct btrfs_root *root,
1453 struct inode *inode);
1455 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
1456 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1457 extern struct file_operations btrfs_file_operations;
1458 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1459 struct btrfs_root *root, struct inode *inode,
1460 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1462 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1463 struct btrfs_root *root, int cache_only);
1466 int btrfs_init_sysfs(void);
1467 void btrfs_exit_sysfs(void);
1468 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1469 int btrfs_sysfs_add_root(struct btrfs_root *root);
1470 void btrfs_sysfs_del_root(struct btrfs_root *root);
1471 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1474 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1475 int btrfs_delete_xattrs(struct btrfs_trans_handle *trans,
1476 struct btrfs_root *root, struct inode *inode);
1478 u64 btrfs_parse_size(char *str);