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
250 #define BTRFS_LABEL_SIZE 256
253 * the super block basically lists the main trees of the FS
254 * it currently lacks any block count etc etc
256 struct btrfs_super_block {
257 u8 csum[BTRFS_CSUM_SIZE];
258 /* the first 4 fields must match struct btrfs_header */
259 u8 fsid[16]; /* FS specific uuid */
260 __le64 bytenr; /* this block number */
263 /* allowed to be different from the btrfs_header from here own down */
270 __le64 root_dir_objectid;
276 __le32 sys_chunk_array_size;
279 struct btrfs_dev_item dev_item;
280 char label[BTRFS_LABEL_SIZE];
281 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
282 } __attribute__ ((__packed__));
285 * A leaf is full of items. offset and size tell us where to find
286 * the item in the leaf (relative to the start of the data area)
289 struct btrfs_disk_key key;
292 } __attribute__ ((__packed__));
295 * leaves have an item area and a data area:
296 * [item0, item1....itemN] [free space] [dataN...data1, data0]
298 * The data is separate from the items to get the keys closer together
302 struct btrfs_header header;
303 struct btrfs_item items[];
304 } __attribute__ ((__packed__));
307 * all non-leaf blocks are nodes, they hold only keys and pointers to
310 struct btrfs_key_ptr {
311 struct btrfs_disk_key key;
314 } __attribute__ ((__packed__));
317 struct btrfs_header header;
318 struct btrfs_key_ptr ptrs[];
319 } __attribute__ ((__packed__));
322 * btrfs_paths remember the path taken from the root down to the leaf.
323 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
324 * to any other levels that are present.
326 * The slots array records the index of the item or block pointer
327 * used while walking the tree.
330 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
331 int slots[BTRFS_MAX_LEVEL];
337 * items in the extent btree are used to record the objectid of the
338 * owner of the block and the number of references
340 struct btrfs_extent_item {
342 } __attribute__ ((__packed__));
344 struct btrfs_extent_ref {
349 } __attribute__ ((__packed__));
351 /* dev extents record free space on individual devices. The owner
352 * field points back to the chunk allocation mapping tree that allocated
353 * the extent. The chunk tree uuid field is a way to double check the owner
355 struct btrfs_dev_extent {
357 __le64 chunk_objectid;
360 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
361 } __attribute__ ((__packed__));
363 struct btrfs_inode_ref {
366 } __attribute__ ((__packed__));
368 struct btrfs_timespec {
371 } __attribute__ ((__packed__));
374 * there is no padding here on purpose. If you want to extent the inode,
375 * make a new item type
377 struct btrfs_inode_item {
389 struct btrfs_timespec atime;
390 struct btrfs_timespec ctime;
391 struct btrfs_timespec mtime;
392 struct btrfs_timespec otime;
393 } __attribute__ ((__packed__));
395 struct btrfs_dir_item {
396 struct btrfs_disk_key location;
400 } __attribute__ ((__packed__));
402 struct btrfs_root_item {
403 struct btrfs_inode_item inode;
410 struct btrfs_disk_key drop_progress;
413 } __attribute__ ((__packed__));
415 #define BTRFS_FILE_EXTENT_REG 0
416 #define BTRFS_FILE_EXTENT_INLINE 1
418 struct btrfs_file_extent_item {
422 * disk space consumed by the extent, checksum blocks are included
426 __le64 disk_num_bytes;
428 * the logical offset in file blocks (no csums)
429 * this extent record is for. This allows a file extent to point
430 * into the middle of an existing extent on disk, sharing it
431 * between two snapshots (useful if some bytes in the middle of the
432 * extent have changed
436 * the logical number of file blocks (no csums included)
439 } __attribute__ ((__packed__));
441 struct btrfs_csum_item {
443 } __attribute__ ((__packed__));
445 /* different types of block groups (and chunks) */
446 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
447 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
448 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
449 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
450 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
451 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
452 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
455 struct btrfs_block_group_item {
457 __le64 chunk_objectid;
459 } __attribute__ ((__packed__));
461 struct btrfs_space_info {
467 struct list_head list;
470 struct btrfs_block_group_cache {
471 struct btrfs_key key;
472 struct btrfs_block_group_item item;
473 struct btrfs_space_info *space_info;
481 struct btrfs_fs_devices;
482 struct btrfs_fs_info {
483 u8 fsid[BTRFS_FSID_SIZE];
484 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
485 struct btrfs_root *extent_root;
486 struct btrfs_root *tree_root;
487 struct btrfs_root *chunk_root;
488 struct btrfs_root *dev_root;
489 struct radix_tree_root fs_roots_radix;
491 struct extent_io_tree free_space_cache;
492 struct extent_io_tree block_group_cache;
493 struct extent_io_tree pinned_extents;
494 struct extent_io_tree pending_del;
495 struct extent_io_tree extent_ins;
497 /* logical->physical extent mapping */
498 struct btrfs_mapping_tree mapping_tree;
501 u64 last_trans_committed;
502 unsigned long mount_opt;
506 struct btrfs_transaction *running_transaction;
507 struct btrfs_super_block super_copy;
508 struct extent_buffer *sb_buffer;
509 struct block_device *__bdev;
510 struct super_block *sb;
511 struct inode *btree_inode;
512 struct backing_dev_info bdi;
513 spinlock_t hash_lock;
514 struct mutex trans_mutex;
515 struct mutex fs_mutex;
516 struct list_head trans_list;
517 struct list_head hashers;
518 struct list_head dead_roots;
519 struct list_head end_io_work_list;
520 struct list_head async_submit_work_list;
521 struct work_struct end_io_work;
522 struct work_struct async_submit_work;
523 spinlock_t end_io_work_lock;
524 spinlock_t async_submit_work_lock;
526 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
527 struct work_struct trans_work;
529 struct delayed_work trans_work;
531 struct kobject super_kobj;
532 struct completion kobj_unregister;
535 unsigned long throttles;
538 struct list_head dirty_cowonly_roots;
540 struct btrfs_fs_devices *fs_devices;
541 struct list_head space_info;
542 spinlock_t delalloc_lock;
543 spinlock_t new_trans_lock;
548 u64 avail_data_alloc_bits;
549 u64 avail_metadata_alloc_bits;
550 u64 avail_system_alloc_bits;
551 u64 data_alloc_profile;
552 u64 metadata_alloc_profile;
553 u64 system_alloc_profile;
557 * in ram representation of the tree. extent_root is used for all allocations
558 * and for the extent tree extent_root root.
561 struct extent_buffer *node;
562 struct extent_buffer *commit_root;
563 struct btrfs_root_item root_item;
564 struct btrfs_key root_key;
565 struct btrfs_fs_info *fs_info;
567 struct kobject root_kobj;
568 struct completion kobj_unregister;
572 /* data allocations are done in sectorsize units */
575 /* node allocations are done in nodesize units */
578 /* leaf allocations are done in leafsize units */
585 u64 last_inode_alloc;
588 struct btrfs_key defrag_progress;
594 /* the dirty list is only used by non-reference counted roots */
595 struct list_head dirty_list;
600 * inode items have the data typically returned from stat and store other
601 * info about object characteristics. There is one for every file and dir in
604 #define BTRFS_INODE_ITEM_KEY 1
605 #define BTRFS_INODE_REF_KEY 2
606 #define BTRFS_XATTR_ITEM_KEY 8
607 /* reserve 2-15 close to the inode for later flexibility */
610 * dir items are the name -> inode pointers in a directory. There is one
611 * for every name in a directory.
613 #define BTRFS_DIR_ITEM_KEY 16
614 #define BTRFS_DIR_INDEX_KEY 17
616 * extent data is for file data
618 #define BTRFS_EXTENT_DATA_KEY 18
620 * csum items have the checksums for data in the extents
622 #define BTRFS_CSUM_ITEM_KEY 19
624 /* reserve 20-31 for other file stuff */
627 * root items point to tree roots. There are typically in the root
628 * tree used by the super block to find all the other trees
630 #define BTRFS_ROOT_ITEM_KEY 32
632 * extent items are in the extent map tree. These record which blocks
633 * are used, and how many references there are to each block
635 #define BTRFS_EXTENT_ITEM_KEY 33
636 #define BTRFS_EXTENT_REF_KEY 34
639 * block groups give us hints into the extent allocation trees. Which
640 * blocks are free etc etc
642 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
644 #define BTRFS_DEV_EXTENT_KEY 75
645 #define BTRFS_DEV_ITEM_KEY 76
646 #define BTRFS_CHUNK_ITEM_KEY 77
649 * string items are for debugging. They just store a short string of
652 #define BTRFS_STRING_ITEM_KEY 253
654 #define BTRFS_MOUNT_NODATASUM (1 << 0)
655 #define BTRFS_MOUNT_NODATACOW (1 << 1)
656 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
657 #define BTRFS_MOUNT_SSD (1 << 3)
659 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
660 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
661 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
666 #define BTRFS_INODE_NODATASUM (1 << 0)
667 #define BTRFS_INODE_NODATACOW (1 << 1)
668 #define BTRFS_INODE_READONLY (1 << 2)
669 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
671 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
673 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
675 /* some macros to generate set/get funcs for the struct fields. This
676 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
679 #define le8_to_cpu(v) (v)
680 #define cpu_to_le8(v) (v)
683 #define read_eb_member(eb, ptr, type, member, result) ( \
684 read_extent_buffer(eb, (char *)(result), \
685 ((unsigned long)(ptr)) + \
686 offsetof(type, member), \
687 sizeof(((type *)0)->member)))
689 #define write_eb_member(eb, ptr, type, member, result) ( \
690 write_extent_buffer(eb, (char *)(result), \
691 ((unsigned long)(ptr)) + \
692 offsetof(type, member), \
693 sizeof(((type *)0)->member)))
695 #ifndef BTRFS_SETGET_FUNCS
696 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
697 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
698 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
701 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
702 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
704 type *p = kmap_atomic(eb->first_page, KM_USER0); \
705 u##bits res = le##bits##_to_cpu(p->member); \
706 kunmap_atomic(p, KM_USER0); \
709 static inline void btrfs_set_##name(struct extent_buffer *eb, \
712 type *p = kmap_atomic(eb->first_page, KM_USER0); \
713 p->member = cpu_to_le##bits(val); \
714 kunmap_atomic(p, KM_USER0); \
717 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
718 static inline u##bits btrfs_##name(type *s) \
720 return le##bits##_to_cpu(s->member); \
722 static inline void btrfs_set_##name(type *s, u##bits val) \
724 s->member = cpu_to_le##bits(val); \
727 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
728 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
729 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
730 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
731 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
732 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
733 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
734 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
735 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
736 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
738 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
739 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
741 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
743 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
745 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
747 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
749 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
750 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
752 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
754 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
757 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
759 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
762 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
763 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
764 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
765 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
766 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
767 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
768 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
769 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
770 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
771 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
772 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
774 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
776 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
779 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
780 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
781 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
783 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
785 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
787 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
789 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
790 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
792 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
794 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
795 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
797 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
800 unsigned long offset = (unsigned long)c;
801 offset += offsetof(struct btrfs_chunk, stripe);
802 offset += nr * sizeof(struct btrfs_stripe);
803 return (struct btrfs_stripe *)offset;
806 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
808 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
811 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
812 struct btrfs_chunk *c, int nr)
814 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
817 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
818 struct btrfs_chunk *c, int nr,
821 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
824 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
825 struct btrfs_chunk *c, int nr)
827 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
830 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
831 struct btrfs_chunk *c, int nr,
834 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
837 /* struct btrfs_block_group_item */
838 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
840 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
842 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
843 struct btrfs_block_group_item, chunk_objectid, 64);
845 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
846 struct btrfs_block_group_item, chunk_objectid, 64);
847 BTRFS_SETGET_FUNCS(disk_block_group_flags,
848 struct btrfs_block_group_item, flags, 64);
849 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
850 struct btrfs_block_group_item, flags, 64);
852 /* struct btrfs_inode_ref */
853 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
855 /* struct btrfs_inode_item */
856 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
857 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
858 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
859 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
860 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
861 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
862 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
863 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
864 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
865 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
866 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
869 static inline struct btrfs_timespec *
870 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
872 unsigned long ptr = (unsigned long)inode_item;
873 ptr += offsetof(struct btrfs_inode_item, atime);
874 return (struct btrfs_timespec *)ptr;
877 static inline struct btrfs_timespec *
878 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
880 unsigned long ptr = (unsigned long)inode_item;
881 ptr += offsetof(struct btrfs_inode_item, mtime);
882 return (struct btrfs_timespec *)ptr;
885 static inline struct btrfs_timespec *
886 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
888 unsigned long ptr = (unsigned long)inode_item;
889 ptr += offsetof(struct btrfs_inode_item, ctime);
890 return (struct btrfs_timespec *)ptr;
893 static inline struct btrfs_timespec *
894 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
896 unsigned long ptr = (unsigned long)inode_item;
897 ptr += offsetof(struct btrfs_inode_item, otime);
898 return (struct btrfs_timespec *)ptr;
901 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
902 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
904 /* struct btrfs_extent_item */
905 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
907 /* struct btrfs_dev_extent */
908 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
910 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
912 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
914 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
916 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
918 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
919 return (u8 *)((unsigned long)dev + ptr);
922 /* struct btrfs_extent_ref */
923 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
924 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
925 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
926 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
928 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
929 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
931 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
933 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
935 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
938 /* struct btrfs_node */
939 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
940 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
942 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
945 ptr = offsetof(struct btrfs_node, ptrs) +
946 sizeof(struct btrfs_key_ptr) * nr;
947 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
950 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
954 ptr = offsetof(struct btrfs_node, ptrs) +
955 sizeof(struct btrfs_key_ptr) * nr;
956 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
959 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
962 ptr = offsetof(struct btrfs_node, ptrs) +
963 sizeof(struct btrfs_key_ptr) * nr;
964 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
967 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
971 ptr = offsetof(struct btrfs_node, ptrs) +
972 sizeof(struct btrfs_key_ptr) * nr;
973 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
976 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
978 return offsetof(struct btrfs_node, ptrs) +
979 sizeof(struct btrfs_key_ptr) * nr;
982 void btrfs_node_key(struct extent_buffer *eb,
983 struct btrfs_disk_key *disk_key, int nr);
985 static inline void btrfs_set_node_key(struct extent_buffer *eb,
986 struct btrfs_disk_key *disk_key, int nr)
989 ptr = btrfs_node_key_ptr_offset(nr);
990 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
991 struct btrfs_key_ptr, key, disk_key);
994 /* struct btrfs_item */
995 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
996 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
998 static inline unsigned long btrfs_item_nr_offset(int nr)
1000 return offsetof(struct btrfs_leaf, items) +
1001 sizeof(struct btrfs_item) * nr;
1004 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1007 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1010 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1011 struct btrfs_item *item)
1013 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1016 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1018 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1021 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1023 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1026 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1028 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1031 static inline void btrfs_item_key(struct extent_buffer *eb,
1032 struct btrfs_disk_key *disk_key, int nr)
1034 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1035 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1038 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1039 struct btrfs_disk_key *disk_key, int nr)
1041 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1042 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1045 /* struct btrfs_dir_item */
1046 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1047 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1048 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1050 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1051 struct btrfs_dir_item *item,
1052 struct btrfs_disk_key *key)
1054 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1057 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1058 struct btrfs_dir_item *item,
1059 struct btrfs_disk_key *key)
1061 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1064 /* struct btrfs_disk_key */
1065 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1067 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1068 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1070 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1071 struct btrfs_disk_key *disk)
1073 cpu->offset = le64_to_cpu(disk->offset);
1074 cpu->type = disk->type;
1075 cpu->objectid = le64_to_cpu(disk->objectid);
1078 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1079 struct btrfs_key *cpu)
1081 disk->offset = cpu_to_le64(cpu->offset);
1082 disk->type = cpu->type;
1083 disk->objectid = cpu_to_le64(cpu->objectid);
1086 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1087 struct btrfs_key *key, int nr)
1089 struct btrfs_disk_key disk_key;
1090 btrfs_node_key(eb, &disk_key, nr);
1091 btrfs_disk_key_to_cpu(key, &disk_key);
1094 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1095 struct btrfs_key *key, int nr)
1097 struct btrfs_disk_key disk_key;
1098 btrfs_item_key(eb, &disk_key, nr);
1099 btrfs_disk_key_to_cpu(key, &disk_key);
1102 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1103 struct btrfs_dir_item *item,
1104 struct btrfs_key *key)
1106 struct btrfs_disk_key disk_key;
1107 btrfs_dir_item_key(eb, item, &disk_key);
1108 btrfs_disk_key_to_cpu(key, &disk_key);
1112 static inline u8 btrfs_key_type(struct btrfs_key *key)
1117 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1122 /* struct btrfs_header */
1123 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1124 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1126 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1127 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1128 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1129 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1131 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1133 return (btrfs_header_flags(eb) & flag) == flag;
1136 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1138 u64 flags = btrfs_header_flags(eb);
1139 btrfs_set_header_flags(eb, flags | flag);
1140 return (flags & flag) == flag;
1143 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1145 u64 flags = btrfs_header_flags(eb);
1146 btrfs_set_header_flags(eb, flags & ~flag);
1147 return (flags & flag) == flag;
1150 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1152 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1156 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1158 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1162 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1164 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1168 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1170 unsigned long ptr = offsetof(struct btrfs_header, csum);
1174 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1179 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1184 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1189 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1191 return (btrfs_header_level(eb) == 0);
1194 /* struct btrfs_root_item */
1195 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1196 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1197 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1199 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1200 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1201 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1202 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1203 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1204 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1205 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1207 /* struct btrfs_super_block */
1208 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1209 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1211 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1212 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1213 struct btrfs_super_block, sys_chunk_array_size, 32);
1214 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1216 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1218 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1219 chunk_root_level, 64);
1220 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1222 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1224 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1226 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1228 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1230 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1232 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1233 root_dir_objectid, 64);
1234 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1237 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1239 return offsetof(struct btrfs_leaf, items);
1242 /* struct btrfs_file_extent_item */
1243 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1245 static inline unsigned long btrfs_file_extent_inline_start(struct
1246 btrfs_file_extent_item *e)
1248 unsigned long offset = (unsigned long)e;
1249 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1253 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1255 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1258 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1259 struct btrfs_item *e)
1261 unsigned long offset;
1262 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1263 return btrfs_item_size(eb, e) - offset;
1266 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1268 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1270 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1271 disk_num_bytes, 64);
1272 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1274 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1277 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1279 return sb->s_fs_info;
1282 static inline int btrfs_set_root_name(struct btrfs_root *root,
1283 const char *name, int len)
1285 /* if we already have a name just free it */
1289 root->name = kmalloc(len+1, GFP_KERNEL);
1293 memcpy(root->name, name, len);
1294 root->name[len] ='\0';
1299 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1301 return root->leafsize;
1302 return root->nodesize;
1305 /* helper function to cast into the data area of the leaf. */
1306 #define btrfs_item_ptr(leaf, slot, type) \
1307 ((type *)(btrfs_leaf_data(leaf) + \
1308 btrfs_item_offset_nr(leaf, slot)))
1310 #define btrfs_item_ptr_offset(leaf, slot) \
1311 ((unsigned long)(btrfs_leaf_data(leaf) + \
1312 btrfs_item_offset_nr(leaf, slot)))
1314 static inline struct dentry *fdentry(struct file *file) {
1315 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1316 return file->f_dentry;
1318 return file->f_path.dentry;
1323 u32 btrfs_count_snapshots_in_path(struct btrfs_root *root,
1324 struct btrfs_path *count_path,
1326 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1327 struct btrfs_root *root);
1328 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1329 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1330 btrfs_fs_info *info,
1332 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1333 struct btrfs_block_group_cache
1334 *hint, u64 search_start,
1335 int data, int owner);
1336 int btrfs_inc_root_ref(struct btrfs_trans_handle *trans,
1337 struct btrfs_root *root, u64 owner_objectid);
1338 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1339 struct btrfs_root *root, u32 size,
1341 u64 hint, u64 empty_size);
1342 struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1343 struct btrfs_root *root,
1351 int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans,
1352 struct btrfs_root *root, u64 new_size);
1353 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1354 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1355 struct btrfs_root *root,
1356 struct btrfs_path *path, u64 bytenr,
1357 u64 root_objectid, u64 ref_generation,
1358 u64 owner, u64 owner_offset);
1359 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1360 struct btrfs_root *root,
1361 u64 num_bytes, u64 min_bytes,
1362 u64 root_objectid, u64 ref_generation,
1363 u64 owner, u64 owner_offset,
1364 u64 empty_size, u64 hint_byte,
1365 u64 search_end, struct btrfs_key *ins, int data);
1366 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1367 struct extent_buffer *buf);
1368 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1369 *root, u64 bytenr, u64 num_bytes,
1370 u64 root_objectid, u64 ref_generation,
1371 u64 owner_objectid, u64 owner_offset, int pin);
1372 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1373 struct btrfs_root *root,
1374 struct extent_io_tree *unpin);
1375 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1376 struct btrfs_root *root,
1377 u64 bytenr, u64 num_bytes,
1378 u64 root_objectid, u64 ref_generation,
1379 u64 owner, u64 owner_offset);
1380 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1381 struct btrfs_root *root);
1382 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1383 int btrfs_read_block_groups(struct btrfs_root *root);
1384 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1385 struct btrfs_root *root, u64 bytes_used,
1386 u64 type, u64 chunk_objectid, u64 chunk_offset,
1389 int btrfs_previous_item(struct btrfs_root *root,
1390 struct btrfs_path *path, u64 min_objectid,
1392 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1393 struct btrfs_root *root, struct extent_buffer *buf,
1394 struct extent_buffer *parent, int parent_slot,
1395 struct extent_buffer **cow_ret);
1396 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1397 struct btrfs_root *root,
1398 struct extent_buffer *buf,
1399 struct extent_buffer **cow_ret, u64 new_root_objectid);
1400 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1401 *root, struct btrfs_path *path, u32 data_size);
1402 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1403 struct btrfs_root *root,
1404 struct btrfs_path *path,
1405 u32 new_size, int from_end);
1406 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1407 *root, struct btrfs_key *key, struct btrfs_path *p, int
1409 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1410 struct btrfs_root *root, struct extent_buffer *parent,
1411 int start_slot, int cache_only, u64 *last_ret,
1412 struct btrfs_key *progress);
1413 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1414 struct btrfs_path *btrfs_alloc_path(void);
1415 void btrfs_free_path(struct btrfs_path *p);
1416 void btrfs_init_path(struct btrfs_path *p);
1417 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1418 struct btrfs_path *path, int slot, int nr);
1420 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1421 struct btrfs_root *root,
1422 struct btrfs_path *path)
1424 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1427 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1428 *root, struct btrfs_key *key, void *data, u32 data_size);
1429 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1430 struct btrfs_root *root,
1431 struct btrfs_path *path,
1432 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1434 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1435 struct btrfs_root *root,
1436 struct btrfs_path *path,
1437 struct btrfs_key *key,
1440 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1443 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1444 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1445 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1446 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1449 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1450 struct btrfs_key *key);
1451 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1452 *root, struct btrfs_key *key, struct btrfs_root_item
1454 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1455 *root, struct btrfs_key *key, struct btrfs_root_item
1457 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1458 btrfs_root_item *item, struct btrfs_key *key);
1459 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1460 struct btrfs_root *latest_root);
1462 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1463 *root, const char *name, int name_len, u64 dir,
1464 struct btrfs_key *location, u8 type);
1465 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1466 struct btrfs_root *root,
1467 struct btrfs_path *path, u64 dir,
1468 const char *name, int name_len,
1470 struct btrfs_dir_item *
1471 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1472 struct btrfs_root *root,
1473 struct btrfs_path *path, u64 dir,
1474 u64 objectid, const char *name, int name_len,
1476 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1477 struct btrfs_path *path,
1478 const char *name, int name_len);
1479 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1480 struct btrfs_root *root,
1481 struct btrfs_path *path,
1482 struct btrfs_dir_item *di);
1483 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1484 struct btrfs_root *root, const char *name,
1485 u16 name_len, const void *data, u16 data_len,
1487 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1488 struct btrfs_root *root,
1489 struct btrfs_path *path, u64 dir,
1490 const char *name, u16 name_len,
1493 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1494 struct btrfs_root *fs_root,
1495 u64 dirid, u64 *objectid);
1496 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1499 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1500 struct btrfs_root *root,
1501 const char *name, int name_len,
1502 u64 inode_objectid, u64 ref_objectid);
1503 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1504 struct btrfs_root *root,
1505 const char *name, int name_len,
1506 u64 inode_objectid, u64 ref_objectid);
1507 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1508 struct btrfs_root *root,
1509 struct btrfs_path *path, u64 objectid);
1510 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1511 *root, struct btrfs_path *path,
1512 struct btrfs_key *location, int mod);
1515 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1516 struct btrfs_root *root,
1517 u64 objectid, u64 pos, u64 offset,
1520 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1521 struct btrfs_root *root,
1522 struct btrfs_path *path, u64 objectid,
1523 u64 bytenr, int mod);
1524 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1525 struct btrfs_root *root, struct inode *inode,
1526 struct bio *bio, char *sums);
1527 int btrfs_csum_one_bio(struct btrfs_root *root,
1528 struct bio *bio, char **sums_ret);
1529 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1530 struct btrfs_root *root,
1531 struct btrfs_path *path,
1532 u64 objectid, u64 offset,
1534 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1535 struct btrfs_root *root, struct btrfs_path *path,
1538 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1539 size_t size, struct bio *bio);
1541 static inline void dec_i_blocks(struct inode *inode, u64 dec)
1544 if (dec <= inode->i_blocks)
1545 inode->i_blocks -= dec;
1547 inode->i_blocks = 0;
1550 unsigned long btrfs_force_ra(struct address_space *mapping,
1551 struct file_ra_state *ra, struct file *file,
1552 pgoff_t offset, pgoff_t last_index);
1553 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1555 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1556 int btrfs_readpage(struct file *file, struct page *page);
1557 void btrfs_delete_inode(struct inode *inode);
1558 void btrfs_put_inode(struct inode *inode);
1559 void btrfs_read_locked_inode(struct inode *inode);
1560 int btrfs_write_inode(struct inode *inode, int wait);
1561 void btrfs_dirty_inode(struct inode *inode);
1562 struct inode *btrfs_alloc_inode(struct super_block *sb);
1563 void btrfs_destroy_inode(struct inode *inode);
1564 int btrfs_init_cachep(void);
1565 void btrfs_destroy_cachep(void);
1566 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1567 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1568 struct btrfs_root *root);
1569 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1571 int btrfs_commit_write(struct file *file, struct page *page,
1572 unsigned from, unsigned to);
1573 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1574 size_t page_offset, u64 start, u64 end,
1576 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1577 struct btrfs_root *root,
1578 struct inode *inode);
1580 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
1581 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1582 extern struct file_operations btrfs_file_operations;
1583 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1584 struct btrfs_root *root, struct inode *inode,
1585 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1587 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1588 struct btrfs_root *root, int cache_only);
1591 int btrfs_init_sysfs(void);
1592 void btrfs_exit_sysfs(void);
1593 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1594 int btrfs_sysfs_add_root(struct btrfs_root *root);
1595 void btrfs_sysfs_del_root(struct btrfs_root *root);
1596 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1599 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1600 int btrfs_delete_xattrs(struct btrfs_trans_handle *trans,
1601 struct btrfs_root *root, struct inode *inode);
1603 u64 btrfs_parse_size(char *str);