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 list_head async_submit_work_list;
518 struct work_struct end_io_work;
519 struct work_struct async_submit_work;
520 spinlock_t end_io_work_lock;
521 spinlock_t async_submit_work_lock;
523 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
524 struct work_struct trans_work;
526 struct delayed_work trans_work;
528 struct kobject super_kobj;
529 struct completion kobj_unregister;
532 unsigned long throttles;
535 struct list_head dirty_cowonly_roots;
537 struct btrfs_fs_devices *fs_devices;
538 struct list_head space_info;
539 spinlock_t delalloc_lock;
540 spinlock_t new_trans_lock;
545 u64 avail_data_alloc_bits;
546 u64 avail_metadata_alloc_bits;
547 u64 avail_system_alloc_bits;
548 u64 data_alloc_profile;
549 u64 metadata_alloc_profile;
550 u64 system_alloc_profile;
554 * in ram representation of the tree. extent_root is used for all allocations
555 * and for the extent tree extent_root root.
558 struct extent_buffer *node;
559 struct extent_buffer *commit_root;
560 struct btrfs_root_item root_item;
561 struct btrfs_key root_key;
562 struct btrfs_fs_info *fs_info;
564 struct kobject root_kobj;
565 struct completion kobj_unregister;
569 /* data allocations are done in sectorsize units */
572 /* node allocations are done in nodesize units */
575 /* leaf allocations are done in leafsize units */
582 u64 last_inode_alloc;
585 struct btrfs_key defrag_progress;
591 /* the dirty list is only used by non-reference counted roots */
592 struct list_head dirty_list;
597 * inode items have the data typically returned from stat and store other
598 * info about object characteristics. There is one for every file and dir in
601 #define BTRFS_INODE_ITEM_KEY 1
602 #define BTRFS_INODE_REF_KEY 2
603 #define BTRFS_XATTR_ITEM_KEY 8
604 /* reserve 2-15 close to the inode for later flexibility */
607 * dir items are the name -> inode pointers in a directory. There is one
608 * for every name in a directory.
610 #define BTRFS_DIR_ITEM_KEY 16
611 #define BTRFS_DIR_INDEX_KEY 17
613 * extent data is for file data
615 #define BTRFS_EXTENT_DATA_KEY 18
617 * csum items have the checksums for data in the extents
619 #define BTRFS_CSUM_ITEM_KEY 19
621 /* reserve 20-31 for other file stuff */
624 * root items point to tree roots. There are typically in the root
625 * tree used by the super block to find all the other trees
627 #define BTRFS_ROOT_ITEM_KEY 32
629 * extent items are in the extent map tree. These record which blocks
630 * are used, and how many references there are to each block
632 #define BTRFS_EXTENT_ITEM_KEY 33
633 #define BTRFS_EXTENT_REF_KEY 34
636 * block groups give us hints into the extent allocation trees. Which
637 * blocks are free etc etc
639 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
641 #define BTRFS_DEV_EXTENT_KEY 75
642 #define BTRFS_DEV_ITEM_KEY 76
643 #define BTRFS_CHUNK_ITEM_KEY 77
646 * string items are for debugging. They just store a short string of
649 #define BTRFS_STRING_ITEM_KEY 253
651 #define BTRFS_MOUNT_NODATASUM (1 << 0)
652 #define BTRFS_MOUNT_NODATACOW (1 << 1)
653 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
654 #define BTRFS_MOUNT_SSD (1 << 3)
656 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
657 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
658 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
663 #define BTRFS_INODE_NODATASUM (1 << 0)
664 #define BTRFS_INODE_NODATACOW (1 << 1)
665 #define BTRFS_INODE_READONLY (1 << 2)
666 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
668 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
670 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
672 /* some macros to generate set/get funcs for the struct fields. This
673 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
676 #define le8_to_cpu(v) (v)
677 #define cpu_to_le8(v) (v)
680 #define read_eb_member(eb, ptr, type, member, result) ( \
681 read_extent_buffer(eb, (char *)(result), \
682 ((unsigned long)(ptr)) + \
683 offsetof(type, member), \
684 sizeof(((type *)0)->member)))
686 #define write_eb_member(eb, ptr, type, member, result) ( \
687 write_extent_buffer(eb, (char *)(result), \
688 ((unsigned long)(ptr)) + \
689 offsetof(type, member), \
690 sizeof(((type *)0)->member)))
692 #ifndef BTRFS_SETGET_FUNCS
693 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
694 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
695 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
698 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
699 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
701 type *p = kmap_atomic(eb->first_page, KM_USER0); \
702 u##bits res = le##bits##_to_cpu(p->member); \
703 kunmap_atomic(p, KM_USER0); \
706 static inline void btrfs_set_##name(struct extent_buffer *eb, \
709 type *p = kmap_atomic(eb->first_page, KM_USER0); \
710 p->member = cpu_to_le##bits(val); \
711 kunmap_atomic(p, KM_USER0); \
714 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
715 static inline u##bits btrfs_##name(type *s) \
717 return le##bits##_to_cpu(s->member); \
719 static inline void btrfs_set_##name(type *s, u##bits val) \
721 s->member = cpu_to_le##bits(val); \
724 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
725 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
726 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
727 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
728 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
729 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
730 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
731 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
732 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
733 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
735 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
736 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
738 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
740 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
742 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
744 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
746 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
747 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
749 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
751 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
754 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
756 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
759 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
760 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
761 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
762 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
763 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
764 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
765 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
766 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
767 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
768 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
769 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
771 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
773 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
776 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
777 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
778 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
780 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
782 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
784 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
786 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
787 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
789 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
791 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
792 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
794 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
797 unsigned long offset = (unsigned long)c;
798 offset += offsetof(struct btrfs_chunk, stripe);
799 offset += nr * sizeof(struct btrfs_stripe);
800 return (struct btrfs_stripe *)offset;
803 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
805 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
808 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
809 struct btrfs_chunk *c, int nr)
811 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
814 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
815 struct btrfs_chunk *c, int nr,
818 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
821 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
822 struct btrfs_chunk *c, int nr)
824 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
827 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
828 struct btrfs_chunk *c, int nr,
831 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
834 /* struct btrfs_block_group_item */
835 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
837 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
839 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
840 struct btrfs_block_group_item, chunk_objectid, 64);
842 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
843 struct btrfs_block_group_item, chunk_objectid, 64);
844 BTRFS_SETGET_FUNCS(disk_block_group_flags,
845 struct btrfs_block_group_item, flags, 64);
846 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
847 struct btrfs_block_group_item, flags, 64);
849 /* struct btrfs_inode_ref */
850 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
852 /* struct btrfs_inode_item */
853 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
854 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
855 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
856 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
857 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
858 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
859 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
860 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
861 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
862 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
863 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
866 static inline struct btrfs_timespec *
867 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
869 unsigned long ptr = (unsigned long)inode_item;
870 ptr += offsetof(struct btrfs_inode_item, atime);
871 return (struct btrfs_timespec *)ptr;
874 static inline struct btrfs_timespec *
875 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
877 unsigned long ptr = (unsigned long)inode_item;
878 ptr += offsetof(struct btrfs_inode_item, mtime);
879 return (struct btrfs_timespec *)ptr;
882 static inline struct btrfs_timespec *
883 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
885 unsigned long ptr = (unsigned long)inode_item;
886 ptr += offsetof(struct btrfs_inode_item, ctime);
887 return (struct btrfs_timespec *)ptr;
890 static inline struct btrfs_timespec *
891 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
893 unsigned long ptr = (unsigned long)inode_item;
894 ptr += offsetof(struct btrfs_inode_item, otime);
895 return (struct btrfs_timespec *)ptr;
898 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
899 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
901 /* struct btrfs_extent_item */
902 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
904 /* struct btrfs_dev_extent */
905 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
907 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
909 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
911 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
913 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
915 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
916 return (u8 *)((unsigned long)dev + ptr);
919 /* struct btrfs_extent_ref */
920 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
921 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
922 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
923 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
925 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
926 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
928 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
930 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
932 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
935 /* struct btrfs_node */
936 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
937 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
939 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
942 ptr = offsetof(struct btrfs_node, ptrs) +
943 sizeof(struct btrfs_key_ptr) * nr;
944 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
947 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
951 ptr = offsetof(struct btrfs_node, ptrs) +
952 sizeof(struct btrfs_key_ptr) * nr;
953 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
956 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
959 ptr = offsetof(struct btrfs_node, ptrs) +
960 sizeof(struct btrfs_key_ptr) * nr;
961 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
964 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
968 ptr = offsetof(struct btrfs_node, ptrs) +
969 sizeof(struct btrfs_key_ptr) * nr;
970 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
973 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
975 return offsetof(struct btrfs_node, ptrs) +
976 sizeof(struct btrfs_key_ptr) * nr;
979 void btrfs_node_key(struct extent_buffer *eb,
980 struct btrfs_disk_key *disk_key, int nr);
982 static inline void btrfs_set_node_key(struct extent_buffer *eb,
983 struct btrfs_disk_key *disk_key, int nr)
986 ptr = btrfs_node_key_ptr_offset(nr);
987 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
988 struct btrfs_key_ptr, key, disk_key);
991 /* struct btrfs_item */
992 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
993 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
995 static inline unsigned long btrfs_item_nr_offset(int nr)
997 return offsetof(struct btrfs_leaf, items) +
998 sizeof(struct btrfs_item) * nr;
1001 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1004 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1007 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1008 struct btrfs_item *item)
1010 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1013 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1015 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1018 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1020 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1023 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1025 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1028 static inline void btrfs_item_key(struct extent_buffer *eb,
1029 struct btrfs_disk_key *disk_key, int nr)
1031 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1032 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1035 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1036 struct btrfs_disk_key *disk_key, int nr)
1038 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1039 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1042 /* struct btrfs_dir_item */
1043 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1044 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1045 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1047 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1048 struct btrfs_dir_item *item,
1049 struct btrfs_disk_key *key)
1051 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1054 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1055 struct btrfs_dir_item *item,
1056 struct btrfs_disk_key *key)
1058 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1061 /* struct btrfs_disk_key */
1062 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1064 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1065 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1067 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1068 struct btrfs_disk_key *disk)
1070 cpu->offset = le64_to_cpu(disk->offset);
1071 cpu->type = disk->type;
1072 cpu->objectid = le64_to_cpu(disk->objectid);
1075 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1076 struct btrfs_key *cpu)
1078 disk->offset = cpu_to_le64(cpu->offset);
1079 disk->type = cpu->type;
1080 disk->objectid = cpu_to_le64(cpu->objectid);
1083 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1084 struct btrfs_key *key, int nr)
1086 struct btrfs_disk_key disk_key;
1087 btrfs_node_key(eb, &disk_key, nr);
1088 btrfs_disk_key_to_cpu(key, &disk_key);
1091 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1092 struct btrfs_key *key, int nr)
1094 struct btrfs_disk_key disk_key;
1095 btrfs_item_key(eb, &disk_key, nr);
1096 btrfs_disk_key_to_cpu(key, &disk_key);
1099 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1100 struct btrfs_dir_item *item,
1101 struct btrfs_key *key)
1103 struct btrfs_disk_key disk_key;
1104 btrfs_dir_item_key(eb, item, &disk_key);
1105 btrfs_disk_key_to_cpu(key, &disk_key);
1109 static inline u8 btrfs_key_type(struct btrfs_key *key)
1114 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1119 /* struct btrfs_header */
1120 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1121 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1123 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1124 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1125 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1126 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1128 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1130 return (btrfs_header_flags(eb) & flag) == flag;
1133 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1135 u64 flags = btrfs_header_flags(eb);
1136 btrfs_set_header_flags(eb, flags | flag);
1137 return (flags & flag) == flag;
1140 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1142 u64 flags = btrfs_header_flags(eb);
1143 btrfs_set_header_flags(eb, flags & ~flag);
1144 return (flags & flag) == flag;
1147 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1149 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1153 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1155 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1159 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1161 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1165 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1167 unsigned long ptr = offsetof(struct btrfs_header, csum);
1171 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1176 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1181 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1186 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1188 return (btrfs_header_level(eb) == 0);
1191 /* struct btrfs_root_item */
1192 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1193 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1194 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1196 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1197 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1198 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1199 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1200 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1201 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1202 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1204 /* struct btrfs_super_block */
1205 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1206 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1208 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1209 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1210 struct btrfs_super_block, sys_chunk_array_size, 32);
1211 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1213 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1215 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1216 chunk_root_level, 64);
1217 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1219 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1221 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1223 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1225 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1227 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1229 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1230 root_dir_objectid, 64);
1231 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1234 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1236 return offsetof(struct btrfs_leaf, items);
1239 /* struct btrfs_file_extent_item */
1240 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1242 static inline unsigned long btrfs_file_extent_inline_start(struct
1243 btrfs_file_extent_item *e)
1245 unsigned long offset = (unsigned long)e;
1246 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1250 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1252 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1255 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1256 struct btrfs_item *e)
1258 unsigned long offset;
1259 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1260 return btrfs_item_size(eb, e) - offset;
1263 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1265 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1267 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1268 disk_num_bytes, 64);
1269 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1271 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1274 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1276 return sb->s_fs_info;
1279 static inline int btrfs_set_root_name(struct btrfs_root *root,
1280 const char *name, int len)
1282 /* if we already have a name just free it */
1286 root->name = kmalloc(len+1, GFP_KERNEL);
1290 memcpy(root->name, name, len);
1291 root->name[len] ='\0';
1296 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1298 return root->leafsize;
1299 return root->nodesize;
1302 /* helper function to cast into the data area of the leaf. */
1303 #define btrfs_item_ptr(leaf, slot, type) \
1304 ((type *)(btrfs_leaf_data(leaf) + \
1305 btrfs_item_offset_nr(leaf, slot)))
1307 #define btrfs_item_ptr_offset(leaf, slot) \
1308 ((unsigned long)(btrfs_leaf_data(leaf) + \
1309 btrfs_item_offset_nr(leaf, slot)))
1311 static inline struct dentry *fdentry(struct file *file) {
1312 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1313 return file->f_dentry;
1315 return file->f_path.dentry;
1320 u32 btrfs_count_snapshots_in_path(struct btrfs_root *root,
1321 struct btrfs_path *count_path,
1323 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1324 struct btrfs_root *root);
1325 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1326 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1327 btrfs_fs_info *info,
1329 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1330 struct btrfs_block_group_cache
1331 *hint, u64 search_start,
1332 int data, int owner);
1333 int btrfs_inc_root_ref(struct btrfs_trans_handle *trans,
1334 struct btrfs_root *root, u64 owner_objectid);
1335 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1336 struct btrfs_root *root, u32 size,
1338 u64 hint, u64 empty_size);
1339 struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1340 struct btrfs_root *root,
1348 int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans,
1349 struct btrfs_root *root, u64 new_size);
1350 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1351 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1352 struct btrfs_root *root,
1353 struct btrfs_path *path, u64 bytenr,
1354 u64 root_objectid, u64 ref_generation,
1355 u64 owner, u64 owner_offset);
1356 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1357 struct btrfs_root *root,
1358 u64 num_bytes, u64 min_bytes,
1359 u64 root_objectid, u64 ref_generation,
1360 u64 owner, u64 owner_offset,
1361 u64 empty_size, u64 hint_byte,
1362 u64 search_end, struct btrfs_key *ins, int data);
1363 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1364 struct extent_buffer *buf);
1365 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1366 *root, u64 bytenr, u64 num_bytes,
1367 u64 root_objectid, u64 ref_generation,
1368 u64 owner_objectid, u64 owner_offset, int pin);
1369 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1370 struct btrfs_root *root,
1371 struct extent_io_tree *unpin);
1372 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1373 struct btrfs_root *root,
1374 u64 bytenr, u64 num_bytes,
1375 u64 root_objectid, u64 ref_generation,
1376 u64 owner, u64 owner_offset);
1377 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1378 struct btrfs_root *root);
1379 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1380 int btrfs_read_block_groups(struct btrfs_root *root);
1381 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1382 struct btrfs_root *root, u64 bytes_used,
1383 u64 type, u64 chunk_objectid, u64 chunk_offset,
1386 int btrfs_previous_item(struct btrfs_root *root,
1387 struct btrfs_path *path, u64 min_objectid,
1389 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1390 struct btrfs_root *root, struct extent_buffer *buf,
1391 struct extent_buffer *parent, int parent_slot,
1392 struct extent_buffer **cow_ret);
1393 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1394 struct btrfs_root *root,
1395 struct extent_buffer *buf,
1396 struct extent_buffer **cow_ret, u64 new_root_objectid);
1397 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1398 *root, struct btrfs_path *path, u32 data_size);
1399 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1400 struct btrfs_root *root,
1401 struct btrfs_path *path,
1402 u32 new_size, int from_end);
1403 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1404 *root, struct btrfs_key *key, struct btrfs_path *p, int
1406 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1407 struct btrfs_root *root, struct extent_buffer *parent,
1408 int start_slot, int cache_only, u64 *last_ret,
1409 struct btrfs_key *progress);
1410 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1411 struct btrfs_path *btrfs_alloc_path(void);
1412 void btrfs_free_path(struct btrfs_path *p);
1413 void btrfs_init_path(struct btrfs_path *p);
1414 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1415 struct btrfs_path *path, int slot, int nr);
1417 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1418 struct btrfs_root *root,
1419 struct btrfs_path *path)
1421 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1424 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1425 *root, struct btrfs_key *key, void *data, u32 data_size);
1426 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1427 struct btrfs_root *root,
1428 struct btrfs_path *path,
1429 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1431 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1432 struct btrfs_root *root,
1433 struct btrfs_path *path,
1434 struct btrfs_key *key,
1437 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1440 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1441 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1442 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1443 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1446 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1447 struct btrfs_key *key);
1448 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1449 *root, struct btrfs_key *key, struct btrfs_root_item
1451 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1452 *root, struct btrfs_key *key, struct btrfs_root_item
1454 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1455 btrfs_root_item *item, struct btrfs_key *key);
1456 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1457 struct btrfs_root *latest_root);
1459 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1460 *root, const char *name, int name_len, u64 dir,
1461 struct btrfs_key *location, u8 type);
1462 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1463 struct btrfs_root *root,
1464 struct btrfs_path *path, u64 dir,
1465 const char *name, int name_len,
1467 struct btrfs_dir_item *
1468 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1469 struct btrfs_root *root,
1470 struct btrfs_path *path, u64 dir,
1471 u64 objectid, const char *name, int name_len,
1473 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1474 struct btrfs_path *path,
1475 const char *name, int name_len);
1476 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1477 struct btrfs_root *root,
1478 struct btrfs_path *path,
1479 struct btrfs_dir_item *di);
1480 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1481 struct btrfs_root *root, const char *name,
1482 u16 name_len, const void *data, u16 data_len,
1484 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1485 struct btrfs_root *root,
1486 struct btrfs_path *path, u64 dir,
1487 const char *name, u16 name_len,
1490 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1491 struct btrfs_root *fs_root,
1492 u64 dirid, u64 *objectid);
1493 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1496 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1497 struct btrfs_root *root,
1498 const char *name, int name_len,
1499 u64 inode_objectid, u64 ref_objectid);
1500 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1501 struct btrfs_root *root,
1502 const char *name, int name_len,
1503 u64 inode_objectid, u64 ref_objectid);
1504 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1505 struct btrfs_root *root,
1506 struct btrfs_path *path, u64 objectid);
1507 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1508 *root, struct btrfs_path *path,
1509 struct btrfs_key *location, int mod);
1512 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1513 struct btrfs_root *root,
1514 u64 objectid, u64 pos, u64 offset,
1517 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1518 struct btrfs_root *root,
1519 struct btrfs_path *path, u64 objectid,
1520 u64 bytenr, int mod);
1521 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1522 struct btrfs_root *root, struct inode *inode,
1523 struct bio *bio, char *sums);
1524 int btrfs_csum_one_bio(struct btrfs_root *root,
1525 struct bio *bio, char **sums_ret);
1526 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1527 struct btrfs_root *root,
1528 struct btrfs_path *path,
1529 u64 objectid, u64 offset,
1531 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1532 struct btrfs_root *root, struct btrfs_path *path,
1535 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1536 size_t size, struct bio *bio);
1538 static inline void dec_i_blocks(struct inode *inode, u64 dec)
1541 if (dec <= inode->i_blocks)
1542 inode->i_blocks -= dec;
1544 inode->i_blocks = 0;
1547 unsigned long btrfs_force_ra(struct address_space *mapping,
1548 struct file_ra_state *ra, struct file *file,
1549 pgoff_t offset, pgoff_t last_index);
1550 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1552 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1553 int btrfs_readpage(struct file *file, struct page *page);
1554 void btrfs_delete_inode(struct inode *inode);
1555 void btrfs_put_inode(struct inode *inode);
1556 void btrfs_read_locked_inode(struct inode *inode);
1557 int btrfs_write_inode(struct inode *inode, int wait);
1558 void btrfs_dirty_inode(struct inode *inode);
1559 struct inode *btrfs_alloc_inode(struct super_block *sb);
1560 void btrfs_destroy_inode(struct inode *inode);
1561 int btrfs_init_cachep(void);
1562 void btrfs_destroy_cachep(void);
1563 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1564 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1565 struct btrfs_root *root);
1566 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1568 int btrfs_commit_write(struct file *file, struct page *page,
1569 unsigned from, unsigned to);
1570 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1571 size_t page_offset, u64 start, u64 end,
1573 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1574 struct btrfs_root *root,
1575 struct inode *inode);
1577 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
1578 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1579 extern struct file_operations btrfs_file_operations;
1580 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1581 struct btrfs_root *root, struct inode *inode,
1582 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1584 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1585 struct btrfs_root *root, int cache_only);
1588 int btrfs_init_sysfs(void);
1589 void btrfs_exit_sysfs(void);
1590 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1591 int btrfs_sysfs_add_root(struct btrfs_root *root);
1592 void btrfs_sysfs_del_root(struct btrfs_root *root);
1593 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1596 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1597 int btrfs_delete_xattrs(struct btrfs_trans_handle *trans,
1598 struct btrfs_root *root, struct inode *inode);
1600 u64 btrfs_parse_size(char *str);