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 <linux/backing-dev.h>
29 #include <asm/kmap_types.h>
30 #include "bit-radix.h"
31 #include "extent_io.h"
32 #include "extent_map.h"
34 struct btrfs_trans_handle;
35 struct btrfs_transaction;
36 extern struct kmem_cache *btrfs_trans_handle_cachep;
37 extern struct kmem_cache *btrfs_transaction_cachep;
38 extern struct kmem_cache *btrfs_bit_radix_cachep;
39 extern struct kmem_cache *btrfs_path_cachep;
41 #define BTRFS_MAGIC "_B5RfS_M"
43 #define BTRFS_MAX_LEVEL 8
45 /* holds pointers to all of the tree roots */
46 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
48 /* stores information about which extents are in use, and reference counts */
49 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
52 * chunk tree stores translations from logical -> physical block numbering
53 * the super block points to the chunk tree
55 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
58 * stores information about which areas of a given device are in use.
59 * one per device. The tree of tree roots points to the device tree
61 #define BTRFS_DEV_TREE_OBJECTID 4ULL
63 /* one per subvolume, storing files and directories */
64 #define BTRFS_FS_TREE_OBJECTID 5ULL
66 /* directory objectid inside the root tree */
67 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
70 * All files have objectids higher than this.
72 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
73 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
77 * the device items go into the chunk tree. The key is in the form
78 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
80 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
83 * we can actually store much bigger names, but lets not confuse the rest
86 #define BTRFS_NAME_LEN 255
88 /* 32 bytes in various csum fields */
89 #define BTRFS_CSUM_SIZE 32
90 /* four bytes for CRC32 */
91 #define BTRFS_CRC32_SIZE 4
92 #define BTRFS_EMPTY_DIR_SIZE 0
94 #define BTRFS_FT_UNKNOWN 0
95 #define BTRFS_FT_REG_FILE 1
96 #define BTRFS_FT_DIR 2
97 #define BTRFS_FT_CHRDEV 3
98 #define BTRFS_FT_BLKDEV 4
99 #define BTRFS_FT_FIFO 5
100 #define BTRFS_FT_SOCK 6
101 #define BTRFS_FT_SYMLINK 7
102 #define BTRFS_FT_XATTR 8
103 #define BTRFS_FT_MAX 9
106 * the key defines the order in the tree, and so it also defines (optimal)
107 * block layout. objectid corresonds to the inode number. The flags
108 * tells us things about the object, and is a kind of stream selector.
109 * so for a given inode, keys with flags of 1 might refer to the inode
110 * data, flags of 2 may point to file data in the btree and flags == 3
111 * may point to extents.
113 * offset is the starting byte offset for this key in the stream.
115 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
116 * in cpu native order. Otherwise they are identical and their sizes
117 * should be the same (ie both packed)
119 struct btrfs_disk_key {
123 } __attribute__ ((__packed__));
129 } __attribute__ ((__packed__));
131 struct btrfs_mapping_tree {
132 struct extent_map_tree map_tree;
135 #define BTRFS_UUID_SIZE 16
136 struct btrfs_dev_item {
137 /* the internal btrfs device id */
140 /* size of the device */
146 /* optimal io alignment for this device */
149 /* optimal io width for this device */
152 /* minimal io size for this device */
155 /* type and info about this device */
158 /* grouping information for allocation decisions */
161 /* seek speed 0-100 where 100 is fastest */
164 /* bandwidth 0-100 where 100 is fastest */
167 /* btrfs generated uuid for this device */
168 u8 uuid[BTRFS_UUID_SIZE];
169 } __attribute__ ((__packed__));
171 struct btrfs_stripe {
174 u8 dev_uuid[BTRFS_UUID_SIZE];
175 } __attribute__ ((__packed__));
178 /* size of this chunk in bytes */
181 /* objectid of the root referencing this chunk */
187 /* optimal io alignment for this chunk */
190 /* optimal io width for this chunk */
193 /* minimal io size for this chunk */
196 /* 2^16 stripes is quite a lot, a second limit is the size of a single
201 /* sub stripes only matter for raid10 */
203 struct btrfs_stripe stripe;
204 /* additional stripes go here */
205 } __attribute__ ((__packed__));
207 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
209 BUG_ON(num_stripes == 0);
210 return sizeof(struct btrfs_chunk) +
211 sizeof(struct btrfs_stripe) * (num_stripes - 1);
214 #define BTRFS_FSID_SIZE 16
215 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
218 * every tree block (leaf or node) starts with this header.
220 struct btrfs_header {
221 /* these first four must match the super block */
222 u8 csum[BTRFS_CSUM_SIZE];
223 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
224 __le64 bytenr; /* which block this node is supposed to live in */
227 /* allowed to be different from the super from here on down */
228 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
233 } __attribute__ ((__packed__));
235 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
236 sizeof(struct btrfs_header)) / \
237 sizeof(struct btrfs_key_ptr))
238 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
239 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
240 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
241 sizeof(struct btrfs_item) - \
242 sizeof(struct btrfs_file_extent_item))
246 * this is a very generous portion of the super block, giving us
247 * room to translate 14 chunks with 3 stripes each.
249 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
252 * the super block basically lists the main trees of the FS
253 * it currently lacks any block count etc etc
255 struct btrfs_super_block {
256 u8 csum[BTRFS_CSUM_SIZE];
257 /* the first 4 fields must match struct btrfs_header */
258 u8 fsid[16]; /* FS specific uuid */
259 __le64 bytenr; /* this block number */
262 /* allowed to be different from the btrfs_header from here own down */
269 __le64 root_dir_objectid;
275 __le32 sys_chunk_array_size;
278 struct btrfs_dev_item dev_item;
279 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
280 } __attribute__ ((__packed__));
283 * A leaf is full of items. offset and size tell us where to find
284 * the item in the leaf (relative to the start of the data area)
287 struct btrfs_disk_key key;
290 } __attribute__ ((__packed__));
293 * leaves have an item area and a data area:
294 * [item0, item1....itemN] [free space] [dataN...data1, data0]
296 * The data is separate from the items to get the keys closer together
300 struct btrfs_header header;
301 struct btrfs_item items[];
302 } __attribute__ ((__packed__));
305 * all non-leaf blocks are nodes, they hold only keys and pointers to
308 struct btrfs_key_ptr {
309 struct btrfs_disk_key key;
312 } __attribute__ ((__packed__));
315 struct btrfs_header header;
316 struct btrfs_key_ptr ptrs[];
317 } __attribute__ ((__packed__));
320 * btrfs_paths remember the path taken from the root down to the leaf.
321 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
322 * to any other levels that are present.
324 * The slots array records the index of the item or block pointer
325 * used while walking the tree.
328 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
329 int slots[BTRFS_MAX_LEVEL];
335 * items in the extent btree are used to record the objectid of the
336 * owner of the block and the number of references
338 struct btrfs_extent_item {
340 } __attribute__ ((__packed__));
342 struct btrfs_extent_ref {
347 } __attribute__ ((__packed__));
349 /* dev extents record free space on individual devices. The owner
350 * field points back to the chunk allocation mapping tree that allocated
351 * the extent. The chunk tree uuid field is a way to double check the owner
353 struct btrfs_dev_extent {
355 __le64 chunk_objectid;
358 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
359 } __attribute__ ((__packed__));
361 struct btrfs_inode_ref {
364 } __attribute__ ((__packed__));
366 struct btrfs_timespec {
369 } __attribute__ ((__packed__));
372 * there is no padding here on purpose. If you want to extent the inode,
373 * make a new item type
375 struct btrfs_inode_item {
387 struct btrfs_timespec atime;
388 struct btrfs_timespec ctime;
389 struct btrfs_timespec mtime;
390 struct btrfs_timespec otime;
391 } __attribute__ ((__packed__));
393 struct btrfs_dir_item {
394 struct btrfs_disk_key location;
398 } __attribute__ ((__packed__));
400 struct btrfs_root_item {
401 struct btrfs_inode_item inode;
408 struct btrfs_disk_key drop_progress;
411 } __attribute__ ((__packed__));
413 #define BTRFS_FILE_EXTENT_REG 0
414 #define BTRFS_FILE_EXTENT_INLINE 1
416 struct btrfs_file_extent_item {
420 * disk space consumed by the extent, checksum blocks are included
424 __le64 disk_num_bytes;
426 * the logical offset in file blocks (no csums)
427 * this extent record is for. This allows a file extent to point
428 * into the middle of an existing extent on disk, sharing it
429 * between two snapshots (useful if some bytes in the middle of the
430 * extent have changed
434 * the logical number of file blocks (no csums included)
437 } __attribute__ ((__packed__));
439 struct btrfs_csum_item {
441 } __attribute__ ((__packed__));
443 /* different types of block groups (and chunks) */
444 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
445 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
446 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
447 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
448 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
449 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
450 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
453 struct btrfs_block_group_item {
455 __le64 chunk_objectid;
457 } __attribute__ ((__packed__));
459 struct btrfs_space_info {
465 struct list_head list;
468 struct btrfs_block_group_cache {
469 struct btrfs_key key;
470 struct btrfs_block_group_item item;
471 struct btrfs_space_info *space_info;
478 struct btrfs_fs_devices;
479 struct btrfs_fs_info {
480 u8 fsid[BTRFS_FSID_SIZE];
481 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
482 struct btrfs_root *extent_root;
483 struct btrfs_root *tree_root;
484 struct btrfs_root *chunk_root;
485 struct btrfs_root *dev_root;
486 struct radix_tree_root fs_roots_radix;
488 struct extent_io_tree free_space_cache;
489 struct extent_io_tree block_group_cache;
490 struct extent_io_tree pinned_extents;
491 struct extent_io_tree pending_del;
492 struct extent_io_tree extent_ins;
494 /* logical->physical extent mapping */
495 struct btrfs_mapping_tree mapping_tree;
498 u64 last_trans_committed;
499 unsigned long mount_opt;
503 struct btrfs_transaction *running_transaction;
504 struct btrfs_super_block super_copy;
505 struct extent_buffer *sb_buffer;
506 struct block_device *__bdev;
507 struct super_block *sb;
508 struct inode *btree_inode;
509 struct backing_dev_info bdi;
510 spinlock_t hash_lock;
511 struct mutex trans_mutex;
512 struct mutex fs_mutex;
513 struct list_head trans_list;
514 struct list_head hashers;
515 struct list_head dead_roots;
516 struct list_head end_io_work_list;
517 struct work_struct end_io_work;
518 spinlock_t end_io_work_lock;
520 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
521 struct work_struct trans_work;
523 struct delayed_work trans_work;
525 struct kobject super_kobj;
526 struct completion kobj_unregister;
529 unsigned long throttles;
532 struct list_head dirty_cowonly_roots;
534 struct btrfs_fs_devices *fs_devices;
535 struct list_head space_info;
536 spinlock_t delalloc_lock;
537 spinlock_t new_trans_lock;
542 u64 avail_data_alloc_bits;
543 u64 avail_metadata_alloc_bits;
544 u64 avail_system_alloc_bits;
545 u64 data_alloc_profile;
546 u64 metadata_alloc_profile;
547 u64 system_alloc_profile;
551 * in ram representation of the tree. extent_root is used for all allocations
552 * and for the extent tree extent_root root.
555 struct extent_buffer *node;
556 struct extent_buffer *commit_root;
557 struct btrfs_root_item root_item;
558 struct btrfs_key root_key;
559 struct btrfs_fs_info *fs_info;
561 struct kobject root_kobj;
562 struct completion kobj_unregister;
566 /* data allocations are done in sectorsize units */
569 /* node allocations are done in nodesize units */
572 /* leaf allocations are done in leafsize units */
579 u64 last_inode_alloc;
582 struct btrfs_key defrag_progress;
588 /* the dirty list is only used by non-reference counted roots */
589 struct list_head dirty_list;
594 * inode items have the data typically returned from stat and store other
595 * info about object characteristics. There is one for every file and dir in
598 #define BTRFS_INODE_ITEM_KEY 1
599 #define BTRFS_INODE_REF_KEY 2
600 #define BTRFS_XATTR_ITEM_KEY 8
601 /* reserve 2-15 close to the inode for later flexibility */
604 * dir items are the name -> inode pointers in a directory. There is one
605 * for every name in a directory.
607 #define BTRFS_DIR_ITEM_KEY 16
608 #define BTRFS_DIR_INDEX_KEY 17
610 * extent data is for file data
612 #define BTRFS_EXTENT_DATA_KEY 18
614 * csum items have the checksums for data in the extents
616 #define BTRFS_CSUM_ITEM_KEY 19
618 /* reserve 20-31 for other file stuff */
621 * root items point to tree roots. There are typically in the root
622 * tree used by the super block to find all the other trees
624 #define BTRFS_ROOT_ITEM_KEY 32
626 * extent items are in the extent map tree. These record which blocks
627 * are used, and how many references there are to each block
629 #define BTRFS_EXTENT_ITEM_KEY 33
630 #define BTRFS_EXTENT_REF_KEY 34
633 * block groups give us hints into the extent allocation trees. Which
634 * blocks are free etc etc
636 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
638 #define BTRFS_DEV_EXTENT_KEY 75
639 #define BTRFS_DEV_ITEM_KEY 76
640 #define BTRFS_CHUNK_ITEM_KEY 77
643 * string items are for debugging. They just store a short string of
646 #define BTRFS_STRING_ITEM_KEY 253
648 #define BTRFS_MOUNT_NODATASUM (1 << 0)
649 #define BTRFS_MOUNT_NODATACOW (1 << 1)
650 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
651 #define BTRFS_MOUNT_SSD (1 << 3)
653 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
654 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
655 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
660 #define BTRFS_INODE_NODATASUM (1 << 0)
661 #define BTRFS_INODE_NODATACOW (1 << 1)
662 #define BTRFS_INODE_READONLY (1 << 2)
663 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
665 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
667 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
669 /* some macros to generate set/get funcs for the struct fields. This
670 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
673 #define le8_to_cpu(v) (v)
674 #define cpu_to_le8(v) (v)
677 #define read_eb_member(eb, ptr, type, member, result) ( \
678 read_extent_buffer(eb, (char *)(result), \
679 ((unsigned long)(ptr)) + \
680 offsetof(type, member), \
681 sizeof(((type *)0)->member)))
683 #define write_eb_member(eb, ptr, type, member, result) ( \
684 write_extent_buffer(eb, (char *)(result), \
685 ((unsigned long)(ptr)) + \
686 offsetof(type, member), \
687 sizeof(((type *)0)->member)))
689 #ifndef BTRFS_SETGET_FUNCS
690 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
691 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
692 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
695 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
696 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
698 type *p = kmap_atomic(eb->first_page, KM_USER0); \
699 u##bits res = le##bits##_to_cpu(p->member); \
700 kunmap_atomic(p, KM_USER0); \
703 static inline void btrfs_set_##name(struct extent_buffer *eb, \
706 type *p = kmap_atomic(eb->first_page, KM_USER0); \
707 p->member = cpu_to_le##bits(val); \
708 kunmap_atomic(p, KM_USER0); \
711 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
712 static inline u##bits btrfs_##name(type *s) \
714 return le##bits##_to_cpu(s->member); \
716 static inline void btrfs_set_##name(type *s, u##bits val) \
718 s->member = cpu_to_le##bits(val); \
721 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
722 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
723 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
724 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
725 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
726 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
727 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
728 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
729 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
730 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
732 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
733 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
735 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
737 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
739 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
741 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
743 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
744 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
746 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
748 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
751 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
753 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
756 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
757 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
758 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
759 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
760 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
761 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
762 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
763 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
764 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
765 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
766 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
768 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
770 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
773 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
774 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
775 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
777 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
779 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
781 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
783 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
784 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
786 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
788 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
789 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
791 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
794 unsigned long offset = (unsigned long)c;
795 offset += offsetof(struct btrfs_chunk, stripe);
796 offset += nr * sizeof(struct btrfs_stripe);
797 return (struct btrfs_stripe *)offset;
800 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
801 struct btrfs_chunk *c, int nr)
803 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
806 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
807 struct btrfs_chunk *c, int nr,
810 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
813 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
814 struct btrfs_chunk *c, int nr)
816 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
819 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
820 struct btrfs_chunk *c, int nr,
823 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
826 /* struct btrfs_block_group_item */
827 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
829 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
831 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
832 struct btrfs_block_group_item, chunk_objectid, 64);
834 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
835 struct btrfs_block_group_item, chunk_objectid, 64);
836 BTRFS_SETGET_FUNCS(disk_block_group_flags,
837 struct btrfs_block_group_item, flags, 64);
838 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
839 struct btrfs_block_group_item, flags, 64);
841 /* struct btrfs_inode_ref */
842 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
844 /* struct btrfs_inode_item */
845 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
846 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
847 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
848 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
849 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
850 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
851 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
852 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
853 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
854 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
855 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
858 static inline struct btrfs_timespec *
859 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
861 unsigned long ptr = (unsigned long)inode_item;
862 ptr += offsetof(struct btrfs_inode_item, atime);
863 return (struct btrfs_timespec *)ptr;
866 static inline struct btrfs_timespec *
867 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
869 unsigned long ptr = (unsigned long)inode_item;
870 ptr += offsetof(struct btrfs_inode_item, mtime);
871 return (struct btrfs_timespec *)ptr;
874 static inline struct btrfs_timespec *
875 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
877 unsigned long ptr = (unsigned long)inode_item;
878 ptr += offsetof(struct btrfs_inode_item, ctime);
879 return (struct btrfs_timespec *)ptr;
882 static inline struct btrfs_timespec *
883 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
885 unsigned long ptr = (unsigned long)inode_item;
886 ptr += offsetof(struct btrfs_inode_item, otime);
887 return (struct btrfs_timespec *)ptr;
890 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
891 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
893 /* struct btrfs_extent_item */
894 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
896 /* struct btrfs_dev_extent */
897 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
899 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
901 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
903 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
905 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
907 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
908 return (u8 *)((unsigned long)dev + ptr);
911 /* struct btrfs_extent_ref */
912 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
913 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
914 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
915 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
917 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
918 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
920 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
922 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
924 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
927 /* struct btrfs_node */
928 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
929 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
931 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
934 ptr = offsetof(struct btrfs_node, ptrs) +
935 sizeof(struct btrfs_key_ptr) * nr;
936 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
939 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
943 ptr = offsetof(struct btrfs_node, ptrs) +
944 sizeof(struct btrfs_key_ptr) * nr;
945 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
948 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
951 ptr = offsetof(struct btrfs_node, ptrs) +
952 sizeof(struct btrfs_key_ptr) * nr;
953 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
956 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
960 ptr = offsetof(struct btrfs_node, ptrs) +
961 sizeof(struct btrfs_key_ptr) * nr;
962 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
965 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
967 return offsetof(struct btrfs_node, ptrs) +
968 sizeof(struct btrfs_key_ptr) * nr;
971 void btrfs_node_key(struct extent_buffer *eb,
972 struct btrfs_disk_key *disk_key, int nr);
974 static inline void btrfs_set_node_key(struct extent_buffer *eb,
975 struct btrfs_disk_key *disk_key, int nr)
978 ptr = btrfs_node_key_ptr_offset(nr);
979 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
980 struct btrfs_key_ptr, key, disk_key);
983 /* struct btrfs_item */
984 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
985 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
987 static inline unsigned long btrfs_item_nr_offset(int nr)
989 return offsetof(struct btrfs_leaf, items) +
990 sizeof(struct btrfs_item) * nr;
993 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
996 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
999 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1000 struct btrfs_item *item)
1002 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1005 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1007 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1010 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1012 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1015 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1017 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1020 static inline void btrfs_item_key(struct extent_buffer *eb,
1021 struct btrfs_disk_key *disk_key, int nr)
1023 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1024 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1027 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1028 struct btrfs_disk_key *disk_key, int nr)
1030 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1031 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1034 /* struct btrfs_dir_item */
1035 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1036 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1037 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1039 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1040 struct btrfs_dir_item *item,
1041 struct btrfs_disk_key *key)
1043 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1046 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1047 struct btrfs_dir_item *item,
1048 struct btrfs_disk_key *key)
1050 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1053 /* struct btrfs_disk_key */
1054 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1056 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1057 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1059 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1060 struct btrfs_disk_key *disk)
1062 cpu->offset = le64_to_cpu(disk->offset);
1063 cpu->type = disk->type;
1064 cpu->objectid = le64_to_cpu(disk->objectid);
1067 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1068 struct btrfs_key *cpu)
1070 disk->offset = cpu_to_le64(cpu->offset);
1071 disk->type = cpu->type;
1072 disk->objectid = cpu_to_le64(cpu->objectid);
1075 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1076 struct btrfs_key *key, int nr)
1078 struct btrfs_disk_key disk_key;
1079 btrfs_node_key(eb, &disk_key, nr);
1080 btrfs_disk_key_to_cpu(key, &disk_key);
1083 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1084 struct btrfs_key *key, int nr)
1086 struct btrfs_disk_key disk_key;
1087 btrfs_item_key(eb, &disk_key, nr);
1088 btrfs_disk_key_to_cpu(key, &disk_key);
1091 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1092 struct btrfs_dir_item *item,
1093 struct btrfs_key *key)
1095 struct btrfs_disk_key disk_key;
1096 btrfs_dir_item_key(eb, item, &disk_key);
1097 btrfs_disk_key_to_cpu(key, &disk_key);
1101 static inline u8 btrfs_key_type(struct btrfs_key *key)
1106 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1111 /* struct btrfs_header */
1112 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1113 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1115 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1116 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1117 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1118 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1120 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1122 return (btrfs_header_flags(eb) & flag) == flag;
1125 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1127 u64 flags = btrfs_header_flags(eb);
1128 btrfs_set_header_flags(eb, flags | flag);
1129 return (flags & flag) == flag;
1132 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1134 u64 flags = btrfs_header_flags(eb);
1135 btrfs_set_header_flags(eb, flags & ~flag);
1136 return (flags & flag) == flag;
1139 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1141 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1145 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1147 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1151 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1153 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1157 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1159 unsigned long ptr = offsetof(struct btrfs_header, csum);
1163 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1168 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1173 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1178 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1180 return (btrfs_header_level(eb) == 0);
1183 /* struct btrfs_root_item */
1184 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1185 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1186 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1188 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1189 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1190 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1191 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1192 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1193 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1194 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1196 /* struct btrfs_super_block */
1197 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1198 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1200 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1201 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1202 struct btrfs_super_block, sys_chunk_array_size, 32);
1203 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1205 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1207 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1208 chunk_root_level, 64);
1209 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1211 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1213 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1215 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1217 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1219 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1221 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1222 root_dir_objectid, 64);
1223 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1226 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1228 return offsetof(struct btrfs_leaf, items);
1231 /* struct btrfs_file_extent_item */
1232 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1234 static inline unsigned long btrfs_file_extent_inline_start(struct
1235 btrfs_file_extent_item *e)
1237 unsigned long offset = (unsigned long)e;
1238 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1242 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1244 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1247 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1248 struct btrfs_item *e)
1250 unsigned long offset;
1251 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1252 return btrfs_item_size(eb, e) - offset;
1255 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1257 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1259 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1260 disk_num_bytes, 64);
1261 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1263 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1266 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1268 return sb->s_fs_info;
1271 static inline int btrfs_set_root_name(struct btrfs_root *root,
1272 const char *name, int len)
1274 /* if we already have a name just free it */
1278 root->name = kmalloc(len+1, GFP_KERNEL);
1282 memcpy(root->name, name, len);
1283 root->name[len] ='\0';
1288 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1290 return root->leafsize;
1291 return root->nodesize;
1294 /* helper function to cast into the data area of the leaf. */
1295 #define btrfs_item_ptr(leaf, slot, type) \
1296 ((type *)(btrfs_leaf_data(leaf) + \
1297 btrfs_item_offset_nr(leaf, slot)))
1299 #define btrfs_item_ptr_offset(leaf, slot) \
1300 ((unsigned long)(btrfs_leaf_data(leaf) + \
1301 btrfs_item_offset_nr(leaf, slot)))
1303 static inline struct dentry *fdentry(struct file *file) {
1304 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1305 return file->f_dentry;
1307 return file->f_path.dentry;
1312 u32 btrfs_count_snapshots_in_path(struct btrfs_root *root,
1313 struct btrfs_path *count_path,
1315 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1316 struct btrfs_root *root);
1317 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1318 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1319 btrfs_fs_info *info,
1321 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1322 struct btrfs_block_group_cache
1323 *hint, u64 search_start,
1324 int data, int owner);
1325 int btrfs_inc_root_ref(struct btrfs_trans_handle *trans,
1326 struct btrfs_root *root, u64 owner_objectid);
1327 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1328 struct btrfs_root *root, u32 size,
1330 u64 hint, u64 empty_size);
1331 struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1332 struct btrfs_root *root,
1340 int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans,
1341 struct btrfs_root *root, u64 new_size);
1342 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1343 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1344 struct btrfs_root *root,
1345 struct btrfs_path *path, u64 bytenr,
1346 u64 root_objectid, u64 ref_generation,
1347 u64 owner, u64 owner_offset);
1348 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1349 struct btrfs_root *root,
1350 u64 num_bytes, u64 min_bytes,
1351 u64 root_objectid, u64 ref_generation,
1352 u64 owner, u64 owner_offset,
1353 u64 empty_size, u64 hint_byte,
1354 u64 search_end, struct btrfs_key *ins, int data);
1355 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1356 struct extent_buffer *buf);
1357 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1358 *root, u64 bytenr, u64 num_bytes,
1359 u64 root_objectid, u64 ref_generation,
1360 u64 owner_objectid, u64 owner_offset, int pin);
1361 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1362 struct btrfs_root *root,
1363 struct extent_io_tree *unpin);
1364 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1365 struct btrfs_root *root,
1366 u64 bytenr, u64 num_bytes,
1367 u64 root_objectid, u64 ref_generation,
1368 u64 owner, u64 owner_offset);
1369 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1370 struct btrfs_root *root);
1371 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1372 int btrfs_read_block_groups(struct btrfs_root *root);
1373 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1374 struct btrfs_root *root, u64 bytes_used,
1375 u64 type, u64 chunk_objectid, u64 chunk_offset,
1378 int btrfs_previous_item(struct btrfs_root *root,
1379 struct btrfs_path *path, u64 min_objectid,
1381 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1382 struct btrfs_root *root, struct extent_buffer *buf,
1383 struct extent_buffer *parent, int parent_slot,
1384 struct extent_buffer **cow_ret);
1385 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1386 struct btrfs_root *root,
1387 struct extent_buffer *buf,
1388 struct extent_buffer **cow_ret, u64 new_root_objectid);
1389 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1390 *root, struct btrfs_path *path, u32 data_size);
1391 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1392 struct btrfs_root *root,
1393 struct btrfs_path *path,
1394 u32 new_size, int from_end);
1395 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1396 *root, struct btrfs_key *key, struct btrfs_path *p, int
1398 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1399 struct btrfs_root *root, struct extent_buffer *parent,
1400 int start_slot, int cache_only, u64 *last_ret,
1401 struct btrfs_key *progress);
1402 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1403 struct btrfs_path *btrfs_alloc_path(void);
1404 void btrfs_free_path(struct btrfs_path *p);
1405 void btrfs_init_path(struct btrfs_path *p);
1406 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1407 struct btrfs_path *path, int slot, int nr);
1409 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1410 struct btrfs_root *root,
1411 struct btrfs_path *path)
1413 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1416 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1417 *root, struct btrfs_key *key, void *data, u32 data_size);
1418 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1419 struct btrfs_root *root,
1420 struct btrfs_path *path,
1421 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1423 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1424 struct btrfs_root *root,
1425 struct btrfs_path *path,
1426 struct btrfs_key *key,
1429 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1432 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1433 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1434 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1435 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1438 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1439 struct btrfs_key *key);
1440 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1441 *root, struct btrfs_key *key, struct btrfs_root_item
1443 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1444 *root, struct btrfs_key *key, struct btrfs_root_item
1446 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1447 btrfs_root_item *item, struct btrfs_key *key);
1448 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1449 struct btrfs_root *latest_root);
1451 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1452 *root, const char *name, int name_len, u64 dir,
1453 struct btrfs_key *location, u8 type);
1454 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1455 struct btrfs_root *root,
1456 struct btrfs_path *path, u64 dir,
1457 const char *name, int name_len,
1459 struct btrfs_dir_item *
1460 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1461 struct btrfs_root *root,
1462 struct btrfs_path *path, u64 dir,
1463 u64 objectid, const char *name, int name_len,
1465 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1466 struct btrfs_path *path,
1467 const char *name, int name_len);
1468 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1469 struct btrfs_root *root,
1470 struct btrfs_path *path,
1471 struct btrfs_dir_item *di);
1472 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1473 struct btrfs_root *root, const char *name,
1474 u16 name_len, const void *data, u16 data_len,
1476 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1477 struct btrfs_root *root,
1478 struct btrfs_path *path, u64 dir,
1479 const char *name, u16 name_len,
1482 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1483 struct btrfs_root *fs_root,
1484 u64 dirid, u64 *objectid);
1485 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1488 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1489 struct btrfs_root *root,
1490 const char *name, int name_len,
1491 u64 inode_objectid, u64 ref_objectid);
1492 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1493 struct btrfs_root *root,
1494 const char *name, int name_len,
1495 u64 inode_objectid, u64 ref_objectid);
1496 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1497 struct btrfs_root *root,
1498 struct btrfs_path *path, u64 objectid);
1499 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1500 *root, struct btrfs_path *path,
1501 struct btrfs_key *location, int mod);
1504 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1505 struct btrfs_root *root,
1506 u64 objectid, u64 pos, u64 offset,
1509 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1510 struct btrfs_root *root,
1511 struct btrfs_path *path, u64 objectid,
1512 u64 bytenr, int mod);
1513 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1514 struct btrfs_root *root, struct inode *inode,
1516 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1517 struct btrfs_root *root,
1518 struct btrfs_path *path,
1519 u64 objectid, u64 offset,
1521 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1522 struct btrfs_root *root, struct btrfs_path *path,
1525 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1526 size_t size, struct bio *bio);
1528 static inline void dec_i_blocks(struct inode *inode, u64 dec)
1531 if (dec <= inode->i_blocks)
1532 inode->i_blocks -= dec;
1534 inode->i_blocks = 0;
1537 unsigned long btrfs_force_ra(struct address_space *mapping,
1538 struct file_ra_state *ra, struct file *file,
1539 pgoff_t offset, pgoff_t last_index);
1540 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1542 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1543 int btrfs_readpage(struct file *file, struct page *page);
1544 void btrfs_delete_inode(struct inode *inode);
1545 void btrfs_put_inode(struct inode *inode);
1546 void btrfs_read_locked_inode(struct inode *inode);
1547 int btrfs_write_inode(struct inode *inode, int wait);
1548 void btrfs_dirty_inode(struct inode *inode);
1549 struct inode *btrfs_alloc_inode(struct super_block *sb);
1550 void btrfs_destroy_inode(struct inode *inode);
1551 int btrfs_init_cachep(void);
1552 void btrfs_destroy_cachep(void);
1553 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1554 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1555 struct btrfs_root *root);
1556 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1558 int btrfs_commit_write(struct file *file, struct page *page,
1559 unsigned from, unsigned to);
1560 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1561 size_t page_offset, u64 start, u64 end,
1563 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1564 struct btrfs_root *root,
1565 struct inode *inode);
1567 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
1568 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1569 extern struct file_operations btrfs_file_operations;
1570 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1571 struct btrfs_root *root, struct inode *inode,
1572 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1574 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1575 struct btrfs_root *root, int cache_only);
1578 int btrfs_init_sysfs(void);
1579 void btrfs_exit_sysfs(void);
1580 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1581 int btrfs_sysfs_add_root(struct btrfs_root *root);
1582 void btrfs_sysfs_del_root(struct btrfs_root *root);
1583 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1586 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1587 int btrfs_delete_xattrs(struct btrfs_trans_handle *trans,
1588 struct btrfs_root *root, struct inode *inode);
1590 u64 btrfs_parse_size(char *str);