2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
22 #include <linux/version.h>
24 #include <linux/highmem.h>
26 #include <linux/workqueue.h>
27 #include <linux/completion.h>
28 #include <asm/kmap_types.h>
29 #include "bit-radix.h"
30 #include "extent_io.h"
31 #include "extent_map.h"
33 struct btrfs_trans_handle;
34 struct btrfs_transaction;
35 extern struct kmem_cache *btrfs_trans_handle_cachep;
36 extern struct kmem_cache *btrfs_transaction_cachep;
37 extern struct kmem_cache *btrfs_bit_radix_cachep;
38 extern struct kmem_cache *btrfs_path_cachep;
40 #define BTRFS_MAGIC "_B5RfS_M"
42 #define BTRFS_MAX_LEVEL 8
44 /* holds pointers to all of the tree roots */
45 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
47 /* stores information about which extents are in use, and reference counts */
48 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
51 * chunk tree stores translations from logical -> physical block numbering
52 * the super block points to the chunk tree
54 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
57 * stores information about which areas of a given device are in use.
58 * one per device. The tree of tree roots points to the device tree
60 #define BTRFS_DEV_TREE_OBJECTID 4ULL
62 /* one per subvolume, storing files and directories */
63 #define BTRFS_FS_TREE_OBJECTID 5ULL
65 /* directory objectid inside the root tree */
66 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
69 * All files have objectids higher than this.
71 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
75 * the device items go into the chunk tree. The key is in the form
76 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
78 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
81 * we can actually store much bigger names, but lets not confuse the rest
84 #define BTRFS_NAME_LEN 255
86 /* 32 bytes in various csum fields */
87 #define BTRFS_CSUM_SIZE 32
88 /* four bytes for CRC32 */
89 #define BTRFS_CRC32_SIZE 4
90 #define BTRFS_EMPTY_DIR_SIZE 0
92 #define BTRFS_FT_UNKNOWN 0
93 #define BTRFS_FT_REG_FILE 1
94 #define BTRFS_FT_DIR 2
95 #define BTRFS_FT_CHRDEV 3
96 #define BTRFS_FT_BLKDEV 4
97 #define BTRFS_FT_FIFO 5
98 #define BTRFS_FT_SOCK 6
99 #define BTRFS_FT_SYMLINK 7
100 #define BTRFS_FT_XATTR 8
101 #define BTRFS_FT_MAX 9
104 * the key defines the order in the tree, and so it also defines (optimal)
105 * block layout. objectid corresonds to the inode number. The flags
106 * tells us things about the object, and is a kind of stream selector.
107 * so for a given inode, keys with flags of 1 might refer to the inode
108 * data, flags of 2 may point to file data in the btree and flags == 3
109 * may point to extents.
111 * offset is the starting byte offset for this key in the stream.
113 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
114 * in cpu native order. Otherwise they are identical and their sizes
115 * should be the same (ie both packed)
117 struct btrfs_disk_key {
121 } __attribute__ ((__packed__));
127 } __attribute__ ((__packed__));
129 struct btrfs_mapping_tree {
130 struct extent_map_tree map_tree;
133 #define BTRFS_DEV_UUID_SIZE 16
134 struct btrfs_dev_item {
135 /* the internal btrfs device id */
138 /* size of the device */
144 /* optimal io alignment for this device */
147 /* optimal io width for this device */
150 /* minimal io size for this device */
153 /* type and info about this device */
156 /* btrfs generated uuid for this device */
157 u8 uuid[BTRFS_DEV_UUID_SIZE];
158 } __attribute__ ((__packed__));
160 struct btrfs_stripe {
163 } __attribute__ ((__packed__));
170 /* optimal io alignment for this chunk */
173 /* optimal io width for this chunk */
176 /* minimal io size for this chunk */
179 /* 2^16 stripes is quite a lot, a second limit is the size of a single
183 struct btrfs_stripe stripe;
184 /* additional stripes go here */
185 } __attribute__ ((__packed__));
187 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
189 BUG_ON(num_stripes == 0);
190 return sizeof(struct btrfs_chunk) +
191 sizeof(struct btrfs_stripe) * (num_stripes - 1);
194 #define BTRFS_FSID_SIZE 16
196 * every tree block (leaf or node) starts with this header.
198 struct btrfs_header {
199 u8 csum[BTRFS_CSUM_SIZE];
200 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
201 __le64 bytenr; /* which block this node is supposed to live in */
207 } __attribute__ ((__packed__));
209 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
210 sizeof(struct btrfs_header)) / \
211 sizeof(struct btrfs_key_ptr))
212 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
213 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
214 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
215 sizeof(struct btrfs_item) - \
216 sizeof(struct btrfs_file_extent_item))
220 * this is a very generous portion of the super block, giving us
221 * room to translate 14 chunks with 3 stripes each.
223 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
226 * the super block basically lists the main trees of the FS
227 * it currently lacks any block count etc etc
229 struct btrfs_super_block {
230 u8 csum[BTRFS_CSUM_SIZE];
231 /* the first 3 fields must match struct btrfs_header */
232 u8 fsid[16]; /* FS specific uuid */
233 __le64 bytenr; /* this block number */
240 __le64 root_dir_objectid;
246 __le32 sys_chunk_array_size;
249 struct btrfs_dev_item dev_item;
250 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
251 } __attribute__ ((__packed__));
254 * A leaf is full of items. offset and size tell us where to find
255 * the item in the leaf (relative to the start of the data area)
258 struct btrfs_disk_key key;
261 } __attribute__ ((__packed__));
264 * leaves have an item area and a data area:
265 * [item0, item1....itemN] [free space] [dataN...data1, data0]
267 * The data is separate from the items to get the keys closer together
271 struct btrfs_header header;
272 struct btrfs_item items[];
273 } __attribute__ ((__packed__));
276 * all non-leaf blocks are nodes, they hold only keys and pointers to
279 struct btrfs_key_ptr {
280 struct btrfs_disk_key key;
283 } __attribute__ ((__packed__));
286 struct btrfs_header header;
287 struct btrfs_key_ptr ptrs[];
288 } __attribute__ ((__packed__));
291 * btrfs_paths remember the path taken from the root down to the leaf.
292 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
293 * to any other levels that are present.
295 * The slots array records the index of the item or block pointer
296 * used while walking the tree.
299 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
300 int slots[BTRFS_MAX_LEVEL];
306 * items in the extent btree are used to record the objectid of the
307 * owner of the block and the number of references
309 struct btrfs_extent_item {
311 } __attribute__ ((__packed__));
313 struct btrfs_extent_ref {
318 } __attribute__ ((__packed__));
320 /* dev extents record free space on individual devices. The owner
321 * field points back to the chunk allocation mapping tree that allocated
324 struct btrfs_dev_extent {
327 } __attribute__ ((__packed__));
330 struct btrfs_inode_ref {
333 } __attribute__ ((__packed__));
335 struct btrfs_timespec {
338 } __attribute__ ((__packed__));
341 * there is no padding here on purpose. If you want to extent the inode,
342 * make a new item type
344 struct btrfs_inode_item {
356 struct btrfs_timespec atime;
357 struct btrfs_timespec ctime;
358 struct btrfs_timespec mtime;
359 struct btrfs_timespec otime;
360 } __attribute__ ((__packed__));
362 struct btrfs_dir_item {
363 struct btrfs_disk_key location;
367 } __attribute__ ((__packed__));
369 struct btrfs_root_item {
370 struct btrfs_inode_item inode;
377 struct btrfs_disk_key drop_progress;
380 } __attribute__ ((__packed__));
382 #define BTRFS_FILE_EXTENT_REG 0
383 #define BTRFS_FILE_EXTENT_INLINE 1
385 struct btrfs_file_extent_item {
389 * disk space consumed by the extent, checksum blocks are included
393 __le64 disk_num_bytes;
395 * the logical offset in file blocks (no csums)
396 * this extent record is for. This allows a file extent to point
397 * into the middle of an existing extent on disk, sharing it
398 * between two snapshots (useful if some bytes in the middle of the
399 * extent have changed
403 * the logical number of file blocks (no csums included)
406 } __attribute__ ((__packed__));
408 struct btrfs_csum_item {
410 } __attribute__ ((__packed__));
412 /* different types of block groups (and chunks) */
413 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
414 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
415 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
418 struct btrfs_block_group_item {
421 __le64 chunk_objectid;
423 } __attribute__ ((__packed__));
425 struct btrfs_space_info {
431 struct list_head list;
434 struct btrfs_block_group_cache {
435 struct btrfs_key key;
436 struct btrfs_block_group_item item;
437 struct btrfs_space_info *space_info;
444 struct btrfs_fs_devices;
445 struct btrfs_fs_info {
446 u8 fsid[BTRFS_FSID_SIZE];
447 struct btrfs_root *extent_root;
448 struct btrfs_root *tree_root;
449 struct btrfs_root *chunk_root;
450 struct btrfs_root *dev_root;
451 struct radix_tree_root fs_roots_radix;
453 struct extent_io_tree free_space_cache;
454 struct extent_io_tree block_group_cache;
455 struct extent_io_tree pinned_extents;
456 struct extent_io_tree pending_del;
457 struct extent_io_tree extent_ins;
459 /* logical->physical extent mapping */
460 struct btrfs_mapping_tree mapping_tree;
463 u64 last_trans_committed;
464 unsigned long mount_opt;
468 struct btrfs_transaction *running_transaction;
469 struct btrfs_super_block super_copy;
470 struct extent_buffer *sb_buffer;
471 struct block_device *__bdev;
472 struct super_block *sb;
473 struct inode *btree_inode;
474 spinlock_t hash_lock;
475 struct mutex trans_mutex;
476 struct mutex fs_mutex;
477 struct list_head trans_list;
478 struct list_head hashers;
479 struct list_head dead_roots;
480 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
481 struct work_struct trans_work;
483 struct delayed_work trans_work;
485 struct kobject super_kobj;
486 struct completion kobj_unregister;
489 unsigned long throttles;
492 struct list_head dirty_cowonly_roots;
494 struct btrfs_fs_devices *fs_devices;
495 struct list_head space_info;
496 spinlock_t delalloc_lock;
497 spinlock_t new_trans_lock;
504 * in ram representation of the tree. extent_root is used for all allocations
505 * and for the extent tree extent_root root.
508 struct extent_buffer *node;
509 struct extent_buffer *commit_root;
510 struct btrfs_root_item root_item;
511 struct btrfs_key root_key;
512 struct btrfs_fs_info *fs_info;
514 struct kobject root_kobj;
515 struct completion kobj_unregister;
519 /* data allocations are done in sectorsize units */
522 /* node allocations are done in nodesize units */
525 /* leaf allocations are done in leafsize units */
532 u64 last_inode_alloc;
535 struct btrfs_key defrag_progress;
541 /* the dirty list is only used by non-reference counted roots */
542 struct list_head dirty_list;
547 * inode items have the data typically returned from stat and store other
548 * info about object characteristics. There is one for every file and dir in
551 #define BTRFS_INODE_ITEM_KEY 1
552 #define BTRFS_INODE_REF_KEY 2
553 #define BTRFS_XATTR_ITEM_KEY 8
554 /* reserve 2-15 close to the inode for later flexibility */
557 * dir items are the name -> inode pointers in a directory. There is one
558 * for every name in a directory.
560 #define BTRFS_DIR_ITEM_KEY 16
561 #define BTRFS_DIR_INDEX_KEY 17
563 * extent data is for file data
565 #define BTRFS_EXTENT_DATA_KEY 18
567 * csum items have the checksums for data in the extents
569 #define BTRFS_CSUM_ITEM_KEY 19
571 /* reserve 20-31 for other file stuff */
574 * root items point to tree roots. There are typically in the root
575 * tree used by the super block to find all the other trees
577 #define BTRFS_ROOT_ITEM_KEY 32
579 * extent items are in the extent map tree. These record which blocks
580 * are used, and how many references there are to each block
582 #define BTRFS_EXTENT_ITEM_KEY 33
583 #define BTRFS_EXTENT_REF_KEY 34
586 * block groups give us hints into the extent allocation trees. Which
587 * blocks are free etc etc
589 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
591 #define BTRFS_DEV_EXTENT_KEY 75
592 #define BTRFS_DEV_ITEM_KEY 76
593 #define BTRFS_CHUNK_ITEM_KEY 77
596 * string items are for debugging. They just store a short string of
599 #define BTRFS_STRING_ITEM_KEY 253
601 #define BTRFS_MOUNT_NODATASUM (1 << 0)
602 #define BTRFS_MOUNT_NODATACOW (1 << 1)
603 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
604 #define BTRFS_MOUNT_SSD (1 << 3)
606 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
607 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
608 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
613 #define BTRFS_INODE_NODATASUM (1 << 0)
614 #define BTRFS_INODE_NODATACOW (1 << 1)
615 #define BTRFS_INODE_READONLY (1 << 2)
616 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
618 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
620 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
622 /* some macros to generate set/get funcs for the struct fields. This
623 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
626 #define le8_to_cpu(v) (v)
627 #define cpu_to_le8(v) (v)
630 #define read_eb_member(eb, ptr, type, member, result) ( \
631 read_extent_buffer(eb, (char *)(result), \
632 ((unsigned long)(ptr)) + \
633 offsetof(type, member), \
634 sizeof(((type *)0)->member)))
636 #define write_eb_member(eb, ptr, type, member, result) ( \
637 write_extent_buffer(eb, (char *)(result), \
638 ((unsigned long)(ptr)) + \
639 offsetof(type, member), \
640 sizeof(((type *)0)->member)))
642 #ifndef BTRFS_SETGET_FUNCS
643 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
644 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
645 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
648 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
649 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
651 type *p = kmap_atomic(eb->first_page, KM_USER0); \
652 u##bits res = le##bits##_to_cpu(p->member); \
653 kunmap_atomic(p, KM_USER0); \
656 static inline void btrfs_set_##name(struct extent_buffer *eb, \
659 type *p = kmap_atomic(eb->first_page, KM_USER0); \
660 p->member = cpu_to_le##bits(val); \
661 kunmap_atomic(p, KM_USER0); \
664 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
665 static inline u##bits btrfs_##name(type *s) \
667 return le##bits##_to_cpu(s->member); \
669 static inline void btrfs_set_##name(type *s, u##bits val) \
671 s->member = cpu_to_le##bits(val); \
674 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
675 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
676 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
677 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
678 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
679 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
680 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
682 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
683 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
685 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
687 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
689 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
691 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
693 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
695 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
697 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
700 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
701 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
702 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
703 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
704 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
705 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
706 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
707 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
708 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
710 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
711 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
713 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
715 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
717 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
719 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
720 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
722 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
723 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
725 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
728 unsigned long offset = (unsigned long)c;
729 offset += offsetof(struct btrfs_chunk, stripe);
730 offset += nr * sizeof(struct btrfs_stripe);
731 return (struct btrfs_stripe *)offset;
734 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
735 struct btrfs_chunk *c, int nr)
737 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
740 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
741 struct btrfs_chunk *c, int nr,
744 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
747 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
748 struct btrfs_chunk *c, int nr)
750 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
753 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
754 struct btrfs_chunk *c, int nr,
757 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
760 /* struct btrfs_block_group_item */
761 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
763 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
765 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_tree, struct btrfs_block_group_item,
767 BTRFS_SETGET_FUNCS(disk_block_group_chunk_tree, struct btrfs_block_group_item,
769 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
770 struct btrfs_block_group_item, chunk_objectid, 64);
771 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objecitd,
772 struct btrfs_block_group_item, chunk_objectid, 64);
773 BTRFS_SETGET_FUNCS(disk_block_group_flags,
774 struct btrfs_block_group_item, flags, 64);
775 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
776 struct btrfs_block_group_item, flags, 64);
778 /* struct btrfs_inode_ref */
779 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
781 /* struct btrfs_inode_item */
782 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
783 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
784 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
785 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
786 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
787 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
788 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
789 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
790 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
791 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
792 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
795 static inline struct btrfs_timespec *
796 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
798 unsigned long ptr = (unsigned long)inode_item;
799 ptr += offsetof(struct btrfs_inode_item, atime);
800 return (struct btrfs_timespec *)ptr;
803 static inline struct btrfs_timespec *
804 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
806 unsigned long ptr = (unsigned long)inode_item;
807 ptr += offsetof(struct btrfs_inode_item, mtime);
808 return (struct btrfs_timespec *)ptr;
811 static inline struct btrfs_timespec *
812 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
814 unsigned long ptr = (unsigned long)inode_item;
815 ptr += offsetof(struct btrfs_inode_item, ctime);
816 return (struct btrfs_timespec *)ptr;
819 static inline struct btrfs_timespec *
820 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
822 unsigned long ptr = (unsigned long)inode_item;
823 ptr += offsetof(struct btrfs_inode_item, otime);
824 return (struct btrfs_timespec *)ptr;
827 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
828 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
830 /* struct btrfs_extent_item */
831 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
833 /* struct btrfs_dev_extent */
834 BTRFS_SETGET_FUNCS(dev_extent_owner, struct btrfs_dev_extent, owner, 64);
835 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
837 /* struct btrfs_extent_ref */
838 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
839 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
840 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
841 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
843 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
844 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
846 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
848 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
850 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
853 /* struct btrfs_node */
854 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
855 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
857 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
860 ptr = offsetof(struct btrfs_node, ptrs) +
861 sizeof(struct btrfs_key_ptr) * nr;
862 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
865 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
869 ptr = offsetof(struct btrfs_node, ptrs) +
870 sizeof(struct btrfs_key_ptr) * nr;
871 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
874 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
877 ptr = offsetof(struct btrfs_node, ptrs) +
878 sizeof(struct btrfs_key_ptr) * nr;
879 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
882 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
886 ptr = offsetof(struct btrfs_node, ptrs) +
887 sizeof(struct btrfs_key_ptr) * nr;
888 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
891 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
893 return offsetof(struct btrfs_node, ptrs) +
894 sizeof(struct btrfs_key_ptr) * nr;
897 void btrfs_node_key(struct extent_buffer *eb,
898 struct btrfs_disk_key *disk_key, int nr);
900 static inline void btrfs_set_node_key(struct extent_buffer *eb,
901 struct btrfs_disk_key *disk_key, int nr)
904 ptr = btrfs_node_key_ptr_offset(nr);
905 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
906 struct btrfs_key_ptr, key, disk_key);
909 /* struct btrfs_item */
910 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
911 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
913 static inline unsigned long btrfs_item_nr_offset(int nr)
915 return offsetof(struct btrfs_leaf, items) +
916 sizeof(struct btrfs_item) * nr;
919 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
922 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
925 static inline u32 btrfs_item_end(struct extent_buffer *eb,
926 struct btrfs_item *item)
928 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
931 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
933 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
936 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
938 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
941 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
943 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
946 static inline void btrfs_item_key(struct extent_buffer *eb,
947 struct btrfs_disk_key *disk_key, int nr)
949 struct btrfs_item *item = btrfs_item_nr(eb, nr);
950 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
953 static inline void btrfs_set_item_key(struct extent_buffer *eb,
954 struct btrfs_disk_key *disk_key, int nr)
956 struct btrfs_item *item = btrfs_item_nr(eb, nr);
957 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
960 /* struct btrfs_dir_item */
961 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
962 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
963 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
965 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
966 struct btrfs_dir_item *item,
967 struct btrfs_disk_key *key)
969 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
972 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
973 struct btrfs_dir_item *item,
974 struct btrfs_disk_key *key)
976 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
979 /* struct btrfs_disk_key */
980 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
982 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
983 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
985 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
986 struct btrfs_disk_key *disk)
988 cpu->offset = le64_to_cpu(disk->offset);
989 cpu->type = disk->type;
990 cpu->objectid = le64_to_cpu(disk->objectid);
993 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
994 struct btrfs_key *cpu)
996 disk->offset = cpu_to_le64(cpu->offset);
997 disk->type = cpu->type;
998 disk->objectid = cpu_to_le64(cpu->objectid);
1001 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1002 struct btrfs_key *key, int nr)
1004 struct btrfs_disk_key disk_key;
1005 btrfs_node_key(eb, &disk_key, nr);
1006 btrfs_disk_key_to_cpu(key, &disk_key);
1009 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1010 struct btrfs_key *key, int nr)
1012 struct btrfs_disk_key disk_key;
1013 btrfs_item_key(eb, &disk_key, nr);
1014 btrfs_disk_key_to_cpu(key, &disk_key);
1017 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1018 struct btrfs_dir_item *item,
1019 struct btrfs_key *key)
1021 struct btrfs_disk_key disk_key;
1022 btrfs_dir_item_key(eb, item, &disk_key);
1023 btrfs_disk_key_to_cpu(key, &disk_key);
1027 static inline u8 btrfs_key_type(struct btrfs_key *key)
1032 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1037 /* struct btrfs_header */
1038 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1039 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1041 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1042 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1043 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 16);
1044 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1046 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1048 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1052 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1054 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1058 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1060 unsigned long ptr = offsetof(struct btrfs_header, csum);
1064 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1069 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1074 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1079 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1081 return (btrfs_header_level(eb) == 0);
1084 /* struct btrfs_root_item */
1085 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1086 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1087 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1089 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1090 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1091 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1092 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1093 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1094 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1095 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1097 /* struct btrfs_super_block */
1098 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1099 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1101 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1102 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1103 struct btrfs_super_block, sys_chunk_array_size, 32);
1104 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1106 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1108 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1109 chunk_root_level, 64);
1110 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1112 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1114 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1116 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1118 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1120 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1122 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1123 root_dir_objectid, 64);
1124 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1127 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1129 return offsetof(struct btrfs_leaf, items);
1132 /* struct btrfs_file_extent_item */
1133 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1135 static inline unsigned long btrfs_file_extent_inline_start(struct
1136 btrfs_file_extent_item *e)
1138 unsigned long offset = (unsigned long)e;
1139 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1143 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1145 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1148 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1149 struct btrfs_item *e)
1151 unsigned long offset;
1152 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1153 return btrfs_item_size(eb, e) - offset;
1156 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1158 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1160 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1161 disk_num_bytes, 64);
1162 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1164 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1167 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1169 return sb->s_fs_info;
1172 static inline int btrfs_set_root_name(struct btrfs_root *root,
1173 const char *name, int len)
1175 /* if we already have a name just free it */
1179 root->name = kmalloc(len+1, GFP_KERNEL);
1183 memcpy(root->name, name, len);
1184 root->name[len] ='\0';
1189 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1191 return root->leafsize;
1192 return root->nodesize;
1195 /* helper function to cast into the data area of the leaf. */
1196 #define btrfs_item_ptr(leaf, slot, type) \
1197 ((type *)(btrfs_leaf_data(leaf) + \
1198 btrfs_item_offset_nr(leaf, slot)))
1200 #define btrfs_item_ptr_offset(leaf, slot) \
1201 ((unsigned long)(btrfs_leaf_data(leaf) + \
1202 btrfs_item_offset_nr(leaf, slot)))
1204 static inline struct dentry *fdentry(struct file *file) {
1205 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1206 return file->f_dentry;
1208 return file->f_path.dentry;
1213 u32 btrfs_count_snapshots_in_path(struct btrfs_root *root,
1214 struct btrfs_path *count_path,
1216 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1217 struct btrfs_root *root);
1218 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1219 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1220 btrfs_fs_info *info,
1222 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1223 struct btrfs_block_group_cache
1224 *hint, u64 search_start,
1225 int data, int owner);
1226 int btrfs_inc_root_ref(struct btrfs_trans_handle *trans,
1227 struct btrfs_root *root, u64 owner_objectid);
1228 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1229 struct btrfs_root *root, u32 size,
1231 u64 hint, u64 empty_size);
1232 struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1233 struct btrfs_root *root,
1241 int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans,
1242 struct btrfs_root *root, u64 new_size);
1243 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1244 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1245 struct btrfs_root *root,
1246 struct btrfs_path *path, u64 bytenr,
1247 u64 root_objectid, u64 ref_generation,
1248 u64 owner, u64 owner_offset);
1249 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1250 struct btrfs_root *root,
1251 u64 num_bytes, u64 root_objectid, u64 ref_generation,
1252 u64 owner, u64 owner_offset,
1253 u64 empty_size, u64 hint_byte,
1254 u64 search_end, struct btrfs_key *ins, int data);
1255 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1256 struct extent_buffer *buf);
1257 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1258 *root, u64 bytenr, u64 num_bytes,
1259 u64 root_objectid, u64 ref_generation,
1260 u64 owner_objectid, u64 owner_offset, int pin);
1261 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1262 struct btrfs_root *root,
1263 struct extent_io_tree *unpin);
1264 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1265 struct btrfs_root *root,
1266 u64 bytenr, u64 num_bytes,
1267 u64 root_objectid, u64 ref_generation,
1268 u64 owner, u64 owner_offset);
1269 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1270 struct btrfs_root *root);
1271 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1272 int btrfs_read_block_groups(struct btrfs_root *root);
1273 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1274 struct btrfs_root *root, u64 bytes_used,
1275 u64 type, u64 chunk_tree, u64 chunk_objectid,
1278 int btrfs_previous_item(struct btrfs_root *root,
1279 struct btrfs_path *path, u64 min_objectid,
1281 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1282 struct btrfs_root *root, struct extent_buffer *buf,
1283 struct extent_buffer *parent, int parent_slot,
1284 struct extent_buffer **cow_ret);
1285 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1286 struct btrfs_root *root,
1287 struct extent_buffer *buf,
1288 struct extent_buffer **cow_ret, u64 new_root_objectid);
1289 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1290 *root, struct btrfs_path *path, u32 data_size);
1291 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1292 struct btrfs_root *root,
1293 struct btrfs_path *path,
1294 u32 new_size, int from_end);
1295 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1296 *root, struct btrfs_key *key, struct btrfs_path *p, int
1298 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1299 struct btrfs_root *root, struct extent_buffer *parent,
1300 int start_slot, int cache_only, u64 *last_ret,
1301 struct btrfs_key *progress);
1302 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1303 struct btrfs_path *btrfs_alloc_path(void);
1304 void btrfs_free_path(struct btrfs_path *p);
1305 void btrfs_init_path(struct btrfs_path *p);
1306 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1307 struct btrfs_path *path, int slot, int nr);
1309 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1310 struct btrfs_root *root,
1311 struct btrfs_path *path)
1313 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1316 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1317 *root, struct btrfs_key *key, void *data, u32 data_size);
1318 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1319 struct btrfs_root *root,
1320 struct btrfs_path *path,
1321 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1323 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1324 struct btrfs_root *root,
1325 struct btrfs_path *path,
1326 struct btrfs_key *key,
1329 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1332 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1333 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1334 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1335 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1338 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1339 struct btrfs_key *key);
1340 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1341 *root, struct btrfs_key *key, struct btrfs_root_item
1343 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1344 *root, struct btrfs_key *key, struct btrfs_root_item
1346 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1347 btrfs_root_item *item, struct btrfs_key *key);
1348 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1349 struct btrfs_root *latest_root);
1351 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1352 *root, const char *name, int name_len, u64 dir,
1353 struct btrfs_key *location, u8 type);
1354 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1355 struct btrfs_root *root,
1356 struct btrfs_path *path, u64 dir,
1357 const char *name, int name_len,
1359 struct btrfs_dir_item *
1360 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1361 struct btrfs_root *root,
1362 struct btrfs_path *path, u64 dir,
1363 u64 objectid, const char *name, int name_len,
1365 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1366 struct btrfs_path *path,
1367 const char *name, int name_len);
1368 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1369 struct btrfs_root *root,
1370 struct btrfs_path *path,
1371 struct btrfs_dir_item *di);
1372 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1373 struct btrfs_root *root, const char *name,
1374 u16 name_len, const void *data, u16 data_len,
1376 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1377 struct btrfs_root *root,
1378 struct btrfs_path *path, u64 dir,
1379 const char *name, u16 name_len,
1382 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1383 struct btrfs_root *fs_root,
1384 u64 dirid, u64 *objectid);
1385 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1388 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1389 struct btrfs_root *root,
1390 const char *name, int name_len,
1391 u64 inode_objectid, u64 ref_objectid);
1392 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1393 struct btrfs_root *root,
1394 const char *name, int name_len,
1395 u64 inode_objectid, u64 ref_objectid);
1396 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1397 struct btrfs_root *root,
1398 struct btrfs_path *path, u64 objectid);
1399 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1400 *root, struct btrfs_path *path,
1401 struct btrfs_key *location, int mod);
1404 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1405 struct btrfs_root *root,
1406 u64 objectid, u64 pos, u64 offset,
1409 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1410 struct btrfs_root *root,
1411 struct btrfs_path *path, u64 objectid,
1412 u64 bytenr, int mod);
1413 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1414 struct btrfs_root *root, struct inode *inode,
1416 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1417 struct btrfs_root *root,
1418 struct btrfs_path *path,
1419 u64 objectid, u64 offset,
1421 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1422 struct btrfs_root *root, struct btrfs_path *path,
1425 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1426 size_t size, struct bio *bio);
1428 static inline void dec_i_blocks(struct inode *inode, u64 dec)
1431 if (dec <= inode->i_blocks)
1432 inode->i_blocks -= dec;
1434 inode->i_blocks = 0;
1437 unsigned long btrfs_force_ra(struct address_space *mapping,
1438 struct file_ra_state *ra, struct file *file,
1439 pgoff_t offset, pgoff_t last_index);
1440 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1442 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1443 int btrfs_readpage(struct file *file, struct page *page);
1444 void btrfs_delete_inode(struct inode *inode);
1445 void btrfs_put_inode(struct inode *inode);
1446 void btrfs_read_locked_inode(struct inode *inode);
1447 int btrfs_write_inode(struct inode *inode, int wait);
1448 void btrfs_dirty_inode(struct inode *inode);
1449 struct inode *btrfs_alloc_inode(struct super_block *sb);
1450 void btrfs_destroy_inode(struct inode *inode);
1451 int btrfs_init_cachep(void);
1452 void btrfs_destroy_cachep(void);
1453 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1454 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1455 struct btrfs_root *root);
1456 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1458 int btrfs_commit_write(struct file *file, struct page *page,
1459 unsigned from, unsigned to);
1460 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1461 size_t page_offset, u64 start, u64 end,
1463 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1464 struct btrfs_root *root,
1465 struct inode *inode);
1467 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
1468 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1469 extern struct file_operations btrfs_file_operations;
1470 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1471 struct btrfs_root *root, struct inode *inode,
1472 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1474 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1475 struct btrfs_root *root, int cache_only);
1478 int btrfs_init_sysfs(void);
1479 void btrfs_exit_sysfs(void);
1480 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1481 int btrfs_sysfs_add_root(struct btrfs_root *root);
1482 void btrfs_sysfs_del_root(struct btrfs_root *root);
1483 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1486 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1487 int btrfs_delete_xattrs(struct btrfs_trans_handle *trans,
1488 struct btrfs_root *root, struct inode *inode);
1490 u64 btrfs_parse_size(char *str);