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 "_B5RfS_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
51 * chunk tree stores translations from logical -> physical block numbering
52 * the super block points to the chunk tree
54 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
57 * stores information about which areas of a given device are in use.
58 * one per device. The tree of tree roots points to the device tree
60 #define BTRFS_DEV_TREE_OBJECTID 4ULL
62 /* one per subvolume, storing files and directories */
63 #define BTRFS_FS_TREE_OBJECTID 5ULL
65 /* directory objectid inside the root tree */
66 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
69 * All files have objectids higher than this.
71 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
75 * the device items go into the chunk tree. The key is in the form
76 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
78 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
81 * we can actually store much bigger names, but lets not confuse the rest
84 #define BTRFS_NAME_LEN 255
86 /* 32 bytes in various csum fields */
87 #define BTRFS_CSUM_SIZE 32
88 /* four bytes for CRC32 */
89 #define BTRFS_CRC32_SIZE 4
90 #define BTRFS_EMPTY_DIR_SIZE 0
92 #define BTRFS_FT_UNKNOWN 0
93 #define BTRFS_FT_REG_FILE 1
94 #define BTRFS_FT_DIR 2
95 #define BTRFS_FT_CHRDEV 3
96 #define BTRFS_FT_BLKDEV 4
97 #define BTRFS_FT_FIFO 5
98 #define BTRFS_FT_SOCK 6
99 #define BTRFS_FT_SYMLINK 7
100 #define BTRFS_FT_XATTR 8
101 #define BTRFS_FT_MAX 9
104 * the key defines the order in the tree, and so it also defines (optimal)
105 * block layout. objectid corresonds to the inode number. The flags
106 * tells us things about the object, and is a kind of stream selector.
107 * so for a given inode, keys with flags of 1 might refer to the inode
108 * data, flags of 2 may point to file data in the btree and flags == 3
109 * may point to extents.
111 * offset is the starting byte offset for this key in the stream.
113 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
114 * in cpu native order. Otherwise they are identical and their sizes
115 * should be the same (ie both packed)
117 struct btrfs_disk_key {
121 } __attribute__ ((__packed__));
127 } __attribute__ ((__packed__));
129 struct btrfs_mapping_tree {
130 struct extent_map_tree map_tree;
133 #define BTRFS_DEV_UUID_SIZE 16
134 struct btrfs_dev_item {
135 /* the internal btrfs device id */
138 /* size of the device */
144 /* optimal io alignment for this device */
147 /* optimal io width for this device */
150 /* minimal io size for this device */
153 /* type and info about this device */
156 /* btrfs generated uuid for this device */
157 u8 uuid[BTRFS_DEV_UUID_SIZE];
158 } __attribute__ ((__packed__));
160 struct btrfs_stripe {
163 } __attribute__ ((__packed__));
170 /* optimal io alignment for this chunk */
173 /* optimal io width for this chunk */
176 /* minimal io size for this chunk */
179 /* 2^16 stripes is quite a lot, a second limit is the size of a single
183 struct btrfs_stripe stripe;
184 /* additional stripes go here */
185 } __attribute__ ((__packed__));
187 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
189 BUG_ON(num_stripes == 0);
190 return sizeof(struct btrfs_chunk) +
191 sizeof(struct btrfs_stripe) * (num_stripes - 1);
194 #define BTRFS_FSID_SIZE 16
196 * every tree block (leaf or node) starts with this header.
198 struct btrfs_header {
199 u8 csum[BTRFS_CSUM_SIZE];
200 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
201 __le64 bytenr; /* which block this node is supposed to live in */
207 } __attribute__ ((__packed__));
209 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
210 sizeof(struct btrfs_header)) / \
211 sizeof(struct btrfs_key_ptr))
212 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
213 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
214 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
215 sizeof(struct btrfs_item) - \
216 sizeof(struct btrfs_file_extent_item))
220 * this is a very generous portion of the super block, giving us
221 * room to translate 14 chunks with 3 stripes each.
223 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
226 * the super block basically lists the main trees of the FS
227 * it currently lacks any block count etc etc
229 struct btrfs_super_block {
230 u8 csum[BTRFS_CSUM_SIZE];
231 /* the first 3 fields must match struct btrfs_header */
232 u8 fsid[16]; /* FS specific uuid */
233 __le64 bytenr; /* this block number */
240 __le64 root_dir_objectid;
246 __le32 sys_chunk_array_size;
249 struct btrfs_dev_item dev_item;
250 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
251 } __attribute__ ((__packed__));
254 * A leaf is full of items. offset and size tell us where to find
255 * the item in the leaf (relative to the start of the data area)
258 struct btrfs_disk_key key;
261 } __attribute__ ((__packed__));
264 * leaves have an item area and a data area:
265 * [item0, item1....itemN] [free space] [dataN...data1, data0]
267 * The data is separate from the items to get the keys closer together
271 struct btrfs_header header;
272 struct btrfs_item items[];
273 } __attribute__ ((__packed__));
276 * all non-leaf blocks are nodes, they hold only keys and pointers to
279 struct btrfs_key_ptr {
280 struct btrfs_disk_key key;
283 } __attribute__ ((__packed__));
286 struct btrfs_header header;
287 struct btrfs_key_ptr ptrs[];
288 } __attribute__ ((__packed__));
291 * btrfs_paths remember the path taken from the root down to the leaf.
292 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
293 * to any other levels that are present.
295 * The slots array records the index of the item or block pointer
296 * used while walking the tree.
299 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
300 int slots[BTRFS_MAX_LEVEL];
306 * items in the extent btree are used to record the objectid of the
307 * owner of the block and the number of references
309 struct btrfs_extent_item {
311 } __attribute__ ((__packed__));
313 struct btrfs_extent_ref {
318 } __attribute__ ((__packed__));
320 /* dev extents record free space on individual devices. The owner
321 * field points back to the chunk allocation mapping tree that allocated
324 struct btrfs_dev_extent {
327 } __attribute__ ((__packed__));
330 struct btrfs_inode_ref {
333 } __attribute__ ((__packed__));
335 struct btrfs_timespec {
338 } __attribute__ ((__packed__));
341 * there is no padding here on purpose. If you want to extent the inode,
342 * make a new item type
344 struct btrfs_inode_item {
356 struct btrfs_timespec atime;
357 struct btrfs_timespec ctime;
358 struct btrfs_timespec mtime;
359 struct btrfs_timespec otime;
360 } __attribute__ ((__packed__));
362 struct btrfs_dir_item {
363 struct btrfs_disk_key location;
367 } __attribute__ ((__packed__));
369 struct btrfs_root_item {
370 struct btrfs_inode_item inode;
377 struct btrfs_disk_key drop_progress;
380 } __attribute__ ((__packed__));
382 #define BTRFS_FILE_EXTENT_REG 0
383 #define BTRFS_FILE_EXTENT_INLINE 1
385 struct btrfs_file_extent_item {
389 * disk space consumed by the extent, checksum blocks are included
393 __le64 disk_num_bytes;
395 * the logical offset in file blocks (no csums)
396 * this extent record is for. This allows a file extent to point
397 * into the middle of an existing extent on disk, sharing it
398 * between two snapshots (useful if some bytes in the middle of the
399 * extent have changed
403 * the logical number of file blocks (no csums included)
406 } __attribute__ ((__packed__));
408 struct btrfs_csum_item {
410 } __attribute__ ((__packed__));
412 /* different types of block groups (and chunks) */
413 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
414 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
415 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
416 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
419 struct btrfs_block_group_item {
422 __le64 chunk_objectid;
424 } __attribute__ ((__packed__));
426 struct btrfs_space_info {
432 struct list_head list;
435 struct btrfs_block_group_cache {
436 struct btrfs_key key;
437 struct btrfs_block_group_item item;
438 struct btrfs_space_info *space_info;
445 struct btrfs_fs_devices;
446 struct btrfs_fs_info {
447 u8 fsid[BTRFS_FSID_SIZE];
448 struct btrfs_root *extent_root;
449 struct btrfs_root *tree_root;
450 struct btrfs_root *chunk_root;
451 struct btrfs_root *dev_root;
452 struct radix_tree_root fs_roots_radix;
454 struct extent_io_tree free_space_cache;
455 struct extent_io_tree block_group_cache;
456 struct extent_io_tree pinned_extents;
457 struct extent_io_tree pending_del;
458 struct extent_io_tree extent_ins;
460 /* logical->physical extent mapping */
461 struct btrfs_mapping_tree mapping_tree;
464 u64 last_trans_committed;
465 unsigned long mount_opt;
469 struct btrfs_transaction *running_transaction;
470 struct btrfs_super_block super_copy;
471 struct extent_buffer *sb_buffer;
472 struct block_device *__bdev;
473 struct super_block *sb;
474 struct inode *btree_inode;
475 spinlock_t hash_lock;
476 struct mutex trans_mutex;
477 struct mutex fs_mutex;
478 struct list_head trans_list;
479 struct list_head hashers;
480 struct list_head dead_roots;
481 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
482 struct work_struct trans_work;
484 struct delayed_work trans_work;
486 struct kobject super_kobj;
487 struct completion kobj_unregister;
490 unsigned long throttles;
493 struct list_head dirty_cowonly_roots;
495 struct btrfs_fs_devices *fs_devices;
496 struct list_head space_info;
497 spinlock_t delalloc_lock;
498 spinlock_t new_trans_lock;
502 int extra_data_alloc_bits;
503 int extra_alloc_bits;
507 * in ram representation of the tree. extent_root is used for all allocations
508 * and for the extent tree extent_root root.
511 struct extent_buffer *node;
512 struct extent_buffer *commit_root;
513 struct btrfs_root_item root_item;
514 struct btrfs_key root_key;
515 struct btrfs_fs_info *fs_info;
517 struct kobject root_kobj;
518 struct completion kobj_unregister;
522 /* data allocations are done in sectorsize units */
525 /* node allocations are done in nodesize units */
528 /* leaf allocations are done in leafsize units */
535 u64 last_inode_alloc;
538 struct btrfs_key defrag_progress;
544 /* the dirty list is only used by non-reference counted roots */
545 struct list_head dirty_list;
550 * inode items have the data typically returned from stat and store other
551 * info about object characteristics. There is one for every file and dir in
554 #define BTRFS_INODE_ITEM_KEY 1
555 #define BTRFS_INODE_REF_KEY 2
556 #define BTRFS_XATTR_ITEM_KEY 8
557 /* reserve 2-15 close to the inode for later flexibility */
560 * dir items are the name -> inode pointers in a directory. There is one
561 * for every name in a directory.
563 #define BTRFS_DIR_ITEM_KEY 16
564 #define BTRFS_DIR_INDEX_KEY 17
566 * extent data is for file data
568 #define BTRFS_EXTENT_DATA_KEY 18
570 * csum items have the checksums for data in the extents
572 #define BTRFS_CSUM_ITEM_KEY 19
574 /* reserve 20-31 for other file stuff */
577 * root items point to tree roots. There are typically in the root
578 * tree used by the super block to find all the other trees
580 #define BTRFS_ROOT_ITEM_KEY 32
582 * extent items are in the extent map tree. These record which blocks
583 * are used, and how many references there are to each block
585 #define BTRFS_EXTENT_ITEM_KEY 33
586 #define BTRFS_EXTENT_REF_KEY 34
589 * block groups give us hints into the extent allocation trees. Which
590 * blocks are free etc etc
592 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
594 #define BTRFS_DEV_EXTENT_KEY 75
595 #define BTRFS_DEV_ITEM_KEY 76
596 #define BTRFS_CHUNK_ITEM_KEY 77
599 * string items are for debugging. They just store a short string of
602 #define BTRFS_STRING_ITEM_KEY 253
604 #define BTRFS_MOUNT_NODATASUM (1 << 0)
605 #define BTRFS_MOUNT_NODATACOW (1 << 1)
606 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
607 #define BTRFS_MOUNT_SSD (1 << 3)
609 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
610 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
611 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
616 #define BTRFS_INODE_NODATASUM (1 << 0)
617 #define BTRFS_INODE_NODATACOW (1 << 1)
618 #define BTRFS_INODE_READONLY (1 << 2)
619 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
621 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
623 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
625 /* some macros to generate set/get funcs for the struct fields. This
626 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
629 #define le8_to_cpu(v) (v)
630 #define cpu_to_le8(v) (v)
633 #define read_eb_member(eb, ptr, type, member, result) ( \
634 read_extent_buffer(eb, (char *)(result), \
635 ((unsigned long)(ptr)) + \
636 offsetof(type, member), \
637 sizeof(((type *)0)->member)))
639 #define write_eb_member(eb, ptr, type, member, result) ( \
640 write_extent_buffer(eb, (char *)(result), \
641 ((unsigned long)(ptr)) + \
642 offsetof(type, member), \
643 sizeof(((type *)0)->member)))
645 #ifndef BTRFS_SETGET_FUNCS
646 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
647 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
648 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
651 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
652 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
654 type *p = kmap_atomic(eb->first_page, KM_USER0); \
655 u##bits res = le##bits##_to_cpu(p->member); \
656 kunmap_atomic(p, KM_USER0); \
659 static inline void btrfs_set_##name(struct extent_buffer *eb, \
662 type *p = kmap_atomic(eb->first_page, KM_USER0); \
663 p->member = cpu_to_le##bits(val); \
664 kunmap_atomic(p, KM_USER0); \
667 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
668 static inline u##bits btrfs_##name(type *s) \
670 return le##bits##_to_cpu(s->member); \
672 static inline void btrfs_set_##name(type *s, u##bits val) \
674 s->member = cpu_to_le##bits(val); \
677 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
678 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
679 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
680 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
681 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
682 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
683 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
685 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
686 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
688 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
690 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
692 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
694 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
696 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
698 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
700 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
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);
1127 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1130 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1132 return offsetof(struct btrfs_leaf, items);
1135 /* struct btrfs_file_extent_item */
1136 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1138 static inline unsigned long btrfs_file_extent_inline_start(struct
1139 btrfs_file_extent_item *e)
1141 unsigned long offset = (unsigned long)e;
1142 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1146 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1148 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1151 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1152 struct btrfs_item *e)
1154 unsigned long offset;
1155 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1156 return btrfs_item_size(eb, e) - offset;
1159 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1161 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1163 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1164 disk_num_bytes, 64);
1165 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1167 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1170 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1172 return sb->s_fs_info;
1175 static inline int btrfs_set_root_name(struct btrfs_root *root,
1176 const char *name, int len)
1178 /* if we already have a name just free it */
1182 root->name = kmalloc(len+1, GFP_KERNEL);
1186 memcpy(root->name, name, len);
1187 root->name[len] ='\0';
1192 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1194 return root->leafsize;
1195 return root->nodesize;
1198 /* helper function to cast into the data area of the leaf. */
1199 #define btrfs_item_ptr(leaf, slot, type) \
1200 ((type *)(btrfs_leaf_data(leaf) + \
1201 btrfs_item_offset_nr(leaf, slot)))
1203 #define btrfs_item_ptr_offset(leaf, slot) \
1204 ((unsigned long)(btrfs_leaf_data(leaf) + \
1205 btrfs_item_offset_nr(leaf, slot)))
1207 static inline struct dentry *fdentry(struct file *file) {
1208 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1209 return file->f_dentry;
1211 return file->f_path.dentry;
1216 u32 btrfs_count_snapshots_in_path(struct btrfs_root *root,
1217 struct btrfs_path *count_path,
1219 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1220 struct btrfs_root *root);
1221 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1222 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1223 btrfs_fs_info *info,
1225 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1226 struct btrfs_block_group_cache
1227 *hint, u64 search_start,
1228 int data, int owner);
1229 int btrfs_inc_root_ref(struct btrfs_trans_handle *trans,
1230 struct btrfs_root *root, u64 owner_objectid);
1231 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1232 struct btrfs_root *root, u32 size,
1234 u64 hint, u64 empty_size);
1235 struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1236 struct btrfs_root *root,
1244 int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans,
1245 struct btrfs_root *root, u64 new_size);
1246 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1247 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1248 struct btrfs_root *root,
1249 struct btrfs_path *path, u64 bytenr,
1250 u64 root_objectid, u64 ref_generation,
1251 u64 owner, u64 owner_offset);
1252 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1253 struct btrfs_root *root,
1254 u64 num_bytes, u64 root_objectid, u64 ref_generation,
1255 u64 owner, u64 owner_offset,
1256 u64 empty_size, u64 hint_byte,
1257 u64 search_end, struct btrfs_key *ins, int data);
1258 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1259 struct extent_buffer *buf);
1260 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1261 *root, u64 bytenr, u64 num_bytes,
1262 u64 root_objectid, u64 ref_generation,
1263 u64 owner_objectid, u64 owner_offset, int pin);
1264 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1265 struct btrfs_root *root,
1266 struct extent_io_tree *unpin);
1267 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1268 struct btrfs_root *root,
1269 u64 bytenr, u64 num_bytes,
1270 u64 root_objectid, u64 ref_generation,
1271 u64 owner, u64 owner_offset);
1272 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1273 struct btrfs_root *root);
1274 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1275 int btrfs_read_block_groups(struct btrfs_root *root);
1276 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1277 struct btrfs_root *root, u64 bytes_used,
1278 u64 type, u64 chunk_tree, u64 chunk_objectid,
1281 int btrfs_previous_item(struct btrfs_root *root,
1282 struct btrfs_path *path, u64 min_objectid,
1284 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1285 struct btrfs_root *root, struct extent_buffer *buf,
1286 struct extent_buffer *parent, int parent_slot,
1287 struct extent_buffer **cow_ret);
1288 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1289 struct btrfs_root *root,
1290 struct extent_buffer *buf,
1291 struct extent_buffer **cow_ret, u64 new_root_objectid);
1292 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1293 *root, struct btrfs_path *path, u32 data_size);
1294 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1295 struct btrfs_root *root,
1296 struct btrfs_path *path,
1297 u32 new_size, int from_end);
1298 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1299 *root, struct btrfs_key *key, struct btrfs_path *p, int
1301 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1302 struct btrfs_root *root, struct extent_buffer *parent,
1303 int start_slot, int cache_only, u64 *last_ret,
1304 struct btrfs_key *progress);
1305 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1306 struct btrfs_path *btrfs_alloc_path(void);
1307 void btrfs_free_path(struct btrfs_path *p);
1308 void btrfs_init_path(struct btrfs_path *p);
1309 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1310 struct btrfs_path *path, int slot, int nr);
1312 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1313 struct btrfs_root *root,
1314 struct btrfs_path *path)
1316 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1319 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1320 *root, struct btrfs_key *key, void *data, u32 data_size);
1321 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1322 struct btrfs_root *root,
1323 struct btrfs_path *path,
1324 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1326 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1327 struct btrfs_root *root,
1328 struct btrfs_path *path,
1329 struct btrfs_key *key,
1332 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1335 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1336 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1337 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1338 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1341 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1342 struct btrfs_key *key);
1343 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1344 *root, struct btrfs_key *key, struct btrfs_root_item
1346 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1347 *root, struct btrfs_key *key, struct btrfs_root_item
1349 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1350 btrfs_root_item *item, struct btrfs_key *key);
1351 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1352 struct btrfs_root *latest_root);
1354 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1355 *root, const char *name, int name_len, u64 dir,
1356 struct btrfs_key *location, u8 type);
1357 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1358 struct btrfs_root *root,
1359 struct btrfs_path *path, u64 dir,
1360 const char *name, int name_len,
1362 struct btrfs_dir_item *
1363 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1364 struct btrfs_root *root,
1365 struct btrfs_path *path, u64 dir,
1366 u64 objectid, const char *name, int name_len,
1368 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1369 struct btrfs_path *path,
1370 const char *name, int name_len);
1371 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1372 struct btrfs_root *root,
1373 struct btrfs_path *path,
1374 struct btrfs_dir_item *di);
1375 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1376 struct btrfs_root *root, const char *name,
1377 u16 name_len, const void *data, u16 data_len,
1379 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1380 struct btrfs_root *root,
1381 struct btrfs_path *path, u64 dir,
1382 const char *name, u16 name_len,
1385 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1386 struct btrfs_root *fs_root,
1387 u64 dirid, u64 *objectid);
1388 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1391 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1392 struct btrfs_root *root,
1393 const char *name, int name_len,
1394 u64 inode_objectid, u64 ref_objectid);
1395 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1396 struct btrfs_root *root,
1397 const char *name, int name_len,
1398 u64 inode_objectid, u64 ref_objectid);
1399 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1400 struct btrfs_root *root,
1401 struct btrfs_path *path, u64 objectid);
1402 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1403 *root, struct btrfs_path *path,
1404 struct btrfs_key *location, int mod);
1407 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1408 struct btrfs_root *root,
1409 u64 objectid, u64 pos, u64 offset,
1412 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1413 struct btrfs_root *root,
1414 struct btrfs_path *path, u64 objectid,
1415 u64 bytenr, int mod);
1416 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1417 struct btrfs_root *root, struct inode *inode,
1419 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1420 struct btrfs_root *root,
1421 struct btrfs_path *path,
1422 u64 objectid, u64 offset,
1424 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1425 struct btrfs_root *root, struct btrfs_path *path,
1428 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1429 size_t size, struct bio *bio);
1431 static inline void dec_i_blocks(struct inode *inode, u64 dec)
1434 if (dec <= inode->i_blocks)
1435 inode->i_blocks -= dec;
1437 inode->i_blocks = 0;
1440 unsigned long btrfs_force_ra(struct address_space *mapping,
1441 struct file_ra_state *ra, struct file *file,
1442 pgoff_t offset, pgoff_t last_index);
1443 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1445 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1446 int btrfs_readpage(struct file *file, struct page *page);
1447 void btrfs_delete_inode(struct inode *inode);
1448 void btrfs_put_inode(struct inode *inode);
1449 void btrfs_read_locked_inode(struct inode *inode);
1450 int btrfs_write_inode(struct inode *inode, int wait);
1451 void btrfs_dirty_inode(struct inode *inode);
1452 struct inode *btrfs_alloc_inode(struct super_block *sb);
1453 void btrfs_destroy_inode(struct inode *inode);
1454 int btrfs_init_cachep(void);
1455 void btrfs_destroy_cachep(void);
1456 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1457 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1458 struct btrfs_root *root);
1459 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1461 int btrfs_commit_write(struct file *file, struct page *page,
1462 unsigned from, unsigned to);
1463 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1464 size_t page_offset, u64 start, u64 end,
1466 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1467 struct btrfs_root *root,
1468 struct inode *inode);
1470 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
1471 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1472 extern struct file_operations btrfs_file_operations;
1473 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1474 struct btrfs_root *root, struct inode *inode,
1475 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1477 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1478 struct btrfs_root *root, int cache_only);
1481 int btrfs_init_sysfs(void);
1482 void btrfs_exit_sysfs(void);
1483 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1484 int btrfs_sysfs_add_root(struct btrfs_root *root);
1485 void btrfs_sysfs_del_root(struct btrfs_root *root);
1486 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1489 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1490 int btrfs_delete_xattrs(struct btrfs_trans_handle *trans,
1491 struct btrfs_root *root, struct inode *inode);
1493 u64 btrfs_parse_size(char *str);