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 "_B4RfS_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 /* the kernel device number */
156 /* type and info about this device */
159 /* partition number, 0 for whole dev */
162 /* length of the name data at the end of the item */
165 /* physical drive uuid (or lvm uuid) */
166 u8 uuid[BTRFS_DEV_UUID_SIZE];
168 } __attribute__ ((__packed__));
170 struct btrfs_stripe {
173 } __attribute__ ((__packed__));
180 /* optimal io alignment for this chunk */
183 /* optimal io width for this chunk */
186 /* minimal io size for this chunk */
189 /* 2^16 stripes is quite a lot, a second limit is the size of a single
193 struct btrfs_stripe stripe;
194 /* additional stripes go here */
195 } __attribute__ ((__packed__));
197 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
199 BUG_ON(num_stripes == 0);
200 return sizeof(struct btrfs_chunk) +
201 sizeof(struct btrfs_stripe) * (num_stripes - 1);
204 #define BTRFS_FSID_SIZE 16
206 * every tree block (leaf or node) starts with this header.
208 struct btrfs_header {
209 u8 csum[BTRFS_CSUM_SIZE];
210 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
211 __le64 bytenr; /* which block this node is supposed to live in */
217 } __attribute__ ((__packed__));
219 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
220 sizeof(struct btrfs_header)) / \
221 sizeof(struct btrfs_key_ptr))
222 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
223 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
224 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
225 sizeof(struct btrfs_item) - \
226 sizeof(struct btrfs_file_extent_item))
230 * this is a very generous portion of the super block, giving us
231 * room to translate 14 chunks with 3 stripes each.
233 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
236 * the super block basically lists the main trees of the FS
237 * it currently lacks any block count etc etc
239 struct btrfs_super_block {
240 u8 csum[BTRFS_CSUM_SIZE];
241 /* the first 3 fields must match struct btrfs_header */
242 u8 fsid[16]; /* FS specific uuid */
243 __le64 bytenr; /* this block number */
250 __le64 root_dir_objectid;
255 __le32 sys_chunk_array_size;
258 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
259 } __attribute__ ((__packed__));
262 * A leaf is full of items. offset and size tell us where to find
263 * the item in the leaf (relative to the start of the data area)
266 struct btrfs_disk_key key;
269 } __attribute__ ((__packed__));
272 * leaves have an item area and a data area:
273 * [item0, item1....itemN] [free space] [dataN...data1, data0]
275 * The data is separate from the items to get the keys closer together
279 struct btrfs_header header;
280 struct btrfs_item items[];
281 } __attribute__ ((__packed__));
284 * all non-leaf blocks are nodes, they hold only keys and pointers to
287 struct btrfs_key_ptr {
288 struct btrfs_disk_key key;
291 } __attribute__ ((__packed__));
294 struct btrfs_header header;
295 struct btrfs_key_ptr ptrs[];
296 } __attribute__ ((__packed__));
299 * btrfs_paths remember the path taken from the root down to the leaf.
300 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
301 * to any other levels that are present.
303 * The slots array records the index of the item or block pointer
304 * used while walking the tree.
307 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
308 int slots[BTRFS_MAX_LEVEL];
314 * items in the extent btree are used to record the objectid of the
315 * owner of the block and the number of references
317 struct btrfs_extent_item {
319 } __attribute__ ((__packed__));
321 struct btrfs_extent_ref {
326 } __attribute__ ((__packed__));
328 /* dev extents record free space on individual devices. The owner
329 * field points back to the chunk allocation mapping tree that allocated
332 struct btrfs_dev_extent {
335 } __attribute__ ((__packed__));
338 struct btrfs_inode_ref {
341 } __attribute__ ((__packed__));
343 struct btrfs_timespec {
346 } __attribute__ ((__packed__));
349 * there is no padding here on purpose. If you want to extent the inode,
350 * make a new item type
352 struct btrfs_inode_item {
364 struct btrfs_timespec atime;
365 struct btrfs_timespec ctime;
366 struct btrfs_timespec mtime;
367 struct btrfs_timespec otime;
368 } __attribute__ ((__packed__));
370 struct btrfs_dir_item {
371 struct btrfs_disk_key location;
375 } __attribute__ ((__packed__));
377 struct btrfs_root_item {
378 struct btrfs_inode_item inode;
385 struct btrfs_disk_key drop_progress;
388 } __attribute__ ((__packed__));
390 #define BTRFS_FILE_EXTENT_REG 0
391 #define BTRFS_FILE_EXTENT_INLINE 1
393 struct btrfs_file_extent_item {
397 * disk space consumed by the extent, checksum blocks are included
401 __le64 disk_num_bytes;
403 * the logical offset in file blocks (no csums)
404 * this extent record is for. This allows a file extent to point
405 * into the middle of an existing extent on disk, sharing it
406 * between two snapshots (useful if some bytes in the middle of the
407 * extent have changed
411 * the logical number of file blocks (no csums included)
414 } __attribute__ ((__packed__));
416 struct btrfs_csum_item {
418 } __attribute__ ((__packed__));
420 /* different types of block groups (and chunks) */
421 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
422 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
423 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
426 struct btrfs_block_group_item {
429 __le64 chunk_objectid;
431 } __attribute__ ((__packed__));
433 struct btrfs_space_info {
439 struct list_head list;
442 struct btrfs_block_group_cache {
443 struct btrfs_key key;
444 struct btrfs_block_group_item item;
445 struct btrfs_space_info *space_info;
452 struct btrfs_fs_info {
453 u8 fsid[BTRFS_FSID_SIZE];
454 struct btrfs_root *extent_root;
455 struct btrfs_root *tree_root;
456 struct btrfs_root *chunk_root;
457 struct btrfs_root *dev_root;
458 struct radix_tree_root fs_roots_radix;
460 struct extent_io_tree free_space_cache;
461 struct extent_io_tree block_group_cache;
462 struct extent_io_tree pinned_extents;
463 struct extent_io_tree pending_del;
464 struct extent_io_tree extent_ins;
466 /* logical->physical extent mapping */
467 struct btrfs_mapping_tree mapping_tree;
470 u64 last_trans_committed;
471 unsigned long mount_opt;
475 struct btrfs_transaction *running_transaction;
476 struct btrfs_super_block super_copy;
477 struct extent_buffer *sb_buffer;
478 struct block_device *__bdev;
479 struct super_block *sb;
480 struct inode *btree_inode;
481 spinlock_t hash_lock;
482 struct mutex trans_mutex;
483 struct mutex fs_mutex;
484 struct list_head trans_list;
485 struct list_head hashers;
486 struct list_head dead_roots;
487 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
488 struct work_struct trans_work;
490 struct delayed_work trans_work;
492 struct kobject super_kobj;
493 struct completion kobj_unregister;
496 unsigned long throttles;
499 struct list_head dirty_cowonly_roots;
501 struct list_head devices;
502 struct list_head space_info;
503 spinlock_t delalloc_lock;
504 spinlock_t new_trans_lock;
511 * in ram representation of the tree. extent_root is used for all allocations
512 * and for the extent tree extent_root root.
515 struct extent_buffer *node;
516 struct extent_buffer *commit_root;
517 struct btrfs_root_item root_item;
518 struct btrfs_key root_key;
519 struct btrfs_fs_info *fs_info;
521 struct kobject root_kobj;
522 struct completion kobj_unregister;
526 /* data allocations are done in sectorsize units */
529 /* node allocations are done in nodesize units */
532 /* leaf allocations are done in leafsize units */
539 u64 last_inode_alloc;
542 struct btrfs_key defrag_progress;
548 /* the dirty list is only used by non-reference counted roots */
549 struct list_head dirty_list;
554 * inode items have the data typically returned from stat and store other
555 * info about object characteristics. There is one for every file and dir in
558 #define BTRFS_INODE_ITEM_KEY 1
559 #define BTRFS_INODE_REF_KEY 2
560 #define BTRFS_XATTR_ITEM_KEY 8
561 /* reserve 2-15 close to the inode for later flexibility */
564 * dir items are the name -> inode pointers in a directory. There is one
565 * for every name in a directory.
567 #define BTRFS_DIR_ITEM_KEY 16
568 #define BTRFS_DIR_INDEX_KEY 17
570 * extent data is for file data
572 #define BTRFS_EXTENT_DATA_KEY 18
574 * csum items have the checksums for data in the extents
576 #define BTRFS_CSUM_ITEM_KEY 19
578 /* reserve 20-31 for other file stuff */
581 * root items point to tree roots. There are typically in the root
582 * tree used by the super block to find all the other trees
584 #define BTRFS_ROOT_ITEM_KEY 32
586 * extent items are in the extent map tree. These record which blocks
587 * are used, and how many references there are to each block
589 #define BTRFS_EXTENT_ITEM_KEY 33
590 #define BTRFS_EXTENT_REF_KEY 34
593 * block groups give us hints into the extent allocation trees. Which
594 * blocks are free etc etc
596 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
598 #define BTRFS_DEV_EXTENT_KEY 75
599 #define BTRFS_DEV_ITEM_KEY 76
600 #define BTRFS_CHUNK_ITEM_KEY 77
603 * string items are for debugging. They just store a short string of
606 #define BTRFS_STRING_ITEM_KEY 253
608 #define BTRFS_MOUNT_NODATASUM (1 << 0)
609 #define BTRFS_MOUNT_NODATACOW (1 << 1)
610 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
611 #define BTRFS_MOUNT_SSD (1 << 3)
613 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
614 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
615 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
620 #define BTRFS_INODE_NODATASUM (1 << 0)
621 #define BTRFS_INODE_NODATACOW (1 << 1)
622 #define BTRFS_INODE_READONLY (1 << 2)
623 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
625 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
627 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
629 /* some macros to generate set/get funcs for the struct fields. This
630 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
633 #define le8_to_cpu(v) (v)
634 #define cpu_to_le8(v) (v)
637 #define read_eb_member(eb, ptr, type, member, result) ( \
638 read_extent_buffer(eb, (char *)(result), \
639 ((unsigned long)(ptr)) + \
640 offsetof(type, member), \
641 sizeof(((type *)0)->member)))
643 #define write_eb_member(eb, ptr, type, member, result) ( \
644 write_extent_buffer(eb, (char *)(result), \
645 ((unsigned long)(ptr)) + \
646 offsetof(type, member), \
647 sizeof(((type *)0)->member)))
649 #ifndef BTRFS_SETGET_FUNCS
650 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
651 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
652 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
655 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
656 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
658 type *p = kmap_atomic(eb->first_page, KM_USER0); \
659 u##bits res = le##bits##_to_cpu(p->member); \
660 kunmap_atomic(p, KM_USER0); \
663 static inline void btrfs_set_##name(struct extent_buffer *eb, \
666 type *p = kmap_atomic(eb->first_page, KM_USER0); \
667 p->member = cpu_to_le##bits(val); \
668 kunmap_atomic(p, KM_USER0); \
671 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
672 static inline u##bits btrfs_##name(type *s) \
674 return le##bits##_to_cpu(s->member); \
676 static inline void btrfs_set_##name(type *s, u##bits val) \
678 s->member = cpu_to_le##bits(val); \
681 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
682 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
683 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
684 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
685 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
686 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
687 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
688 BTRFS_SETGET_FUNCS(device_rdev, struct btrfs_dev_item, rdev, 64);
689 BTRFS_SETGET_FUNCS(device_partition, struct btrfs_dev_item, partition, 32);
690 BTRFS_SETGET_FUNCS(device_name_len, struct btrfs_dev_item, name_len, 16);
692 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
694 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
697 static inline char *btrfs_device_name(struct btrfs_dev_item *d)
699 return (char *)(d + 1);
702 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
703 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
704 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
705 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
706 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
707 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
708 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
709 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
710 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
712 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
713 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
715 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
717 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
719 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
721 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
722 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
724 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
725 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
727 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
730 unsigned long offset = (unsigned long)c;
731 offset += offsetof(struct btrfs_chunk, stripe);
732 offset += nr * sizeof(struct btrfs_stripe);
733 return (struct btrfs_stripe *)offset;
736 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
737 struct btrfs_chunk *c, int nr)
739 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
742 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
743 struct btrfs_chunk *c, int nr,
746 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
749 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
750 struct btrfs_chunk *c, int nr)
752 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
755 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
756 struct btrfs_chunk *c, int nr,
759 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
762 /* struct btrfs_block_group_item */
763 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
765 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
767 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_tree, struct btrfs_block_group_item,
769 BTRFS_SETGET_FUNCS(disk_block_group_chunk_tree, struct btrfs_block_group_item,
771 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
772 struct btrfs_block_group_item, chunk_objectid, 64);
773 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objecitd,
774 struct btrfs_block_group_item, chunk_objectid, 64);
775 BTRFS_SETGET_FUNCS(disk_block_group_flags,
776 struct btrfs_block_group_item, flags, 64);
777 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
778 struct btrfs_block_group_item, flags, 64);
780 /* struct btrfs_inode_ref */
781 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
783 /* struct btrfs_inode_item */
784 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
785 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
786 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
787 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
788 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
789 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
790 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
791 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
792 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
793 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
794 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
797 static inline struct btrfs_timespec *
798 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
800 unsigned long ptr = (unsigned long)inode_item;
801 ptr += offsetof(struct btrfs_inode_item, atime);
802 return (struct btrfs_timespec *)ptr;
805 static inline struct btrfs_timespec *
806 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
808 unsigned long ptr = (unsigned long)inode_item;
809 ptr += offsetof(struct btrfs_inode_item, mtime);
810 return (struct btrfs_timespec *)ptr;
813 static inline struct btrfs_timespec *
814 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
816 unsigned long ptr = (unsigned long)inode_item;
817 ptr += offsetof(struct btrfs_inode_item, ctime);
818 return (struct btrfs_timespec *)ptr;
821 static inline struct btrfs_timespec *
822 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
824 unsigned long ptr = (unsigned long)inode_item;
825 ptr += offsetof(struct btrfs_inode_item, otime);
826 return (struct btrfs_timespec *)ptr;
829 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
830 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
832 /* struct btrfs_extent_item */
833 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
835 /* struct btrfs_dev_extent */
836 BTRFS_SETGET_FUNCS(dev_extent_owner, struct btrfs_dev_extent, owner, 64);
837 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
839 /* struct btrfs_extent_ref */
840 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
841 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
842 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
843 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
845 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
846 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
848 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
850 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
852 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
855 /* struct btrfs_node */
856 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
857 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
859 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
862 ptr = offsetof(struct btrfs_node, ptrs) +
863 sizeof(struct btrfs_key_ptr) * nr;
864 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
867 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
871 ptr = offsetof(struct btrfs_node, ptrs) +
872 sizeof(struct btrfs_key_ptr) * nr;
873 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
876 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
879 ptr = offsetof(struct btrfs_node, ptrs) +
880 sizeof(struct btrfs_key_ptr) * nr;
881 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
884 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
888 ptr = offsetof(struct btrfs_node, ptrs) +
889 sizeof(struct btrfs_key_ptr) * nr;
890 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
893 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
895 return offsetof(struct btrfs_node, ptrs) +
896 sizeof(struct btrfs_key_ptr) * nr;
899 void btrfs_node_key(struct extent_buffer *eb,
900 struct btrfs_disk_key *disk_key, int nr);
902 static inline void btrfs_set_node_key(struct extent_buffer *eb,
903 struct btrfs_disk_key *disk_key, int nr)
906 ptr = btrfs_node_key_ptr_offset(nr);
907 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
908 struct btrfs_key_ptr, key, disk_key);
911 /* struct btrfs_item */
912 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
913 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
915 static inline unsigned long btrfs_item_nr_offset(int nr)
917 return offsetof(struct btrfs_leaf, items) +
918 sizeof(struct btrfs_item) * nr;
921 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
924 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
927 static inline u32 btrfs_item_end(struct extent_buffer *eb,
928 struct btrfs_item *item)
930 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
933 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
935 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
938 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
940 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
943 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
945 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
948 static inline void btrfs_item_key(struct extent_buffer *eb,
949 struct btrfs_disk_key *disk_key, int nr)
951 struct btrfs_item *item = btrfs_item_nr(eb, nr);
952 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
955 static inline void btrfs_set_item_key(struct extent_buffer *eb,
956 struct btrfs_disk_key *disk_key, int nr)
958 struct btrfs_item *item = btrfs_item_nr(eb, nr);
959 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
962 /* struct btrfs_dir_item */
963 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
964 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
965 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
967 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
968 struct btrfs_dir_item *item,
969 struct btrfs_disk_key *key)
971 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
974 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
975 struct btrfs_dir_item *item,
976 struct btrfs_disk_key *key)
978 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
981 /* struct btrfs_disk_key */
982 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
984 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
985 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
987 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
988 struct btrfs_disk_key *disk)
990 cpu->offset = le64_to_cpu(disk->offset);
991 cpu->type = disk->type;
992 cpu->objectid = le64_to_cpu(disk->objectid);
995 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
996 struct btrfs_key *cpu)
998 disk->offset = cpu_to_le64(cpu->offset);
999 disk->type = cpu->type;
1000 disk->objectid = cpu_to_le64(cpu->objectid);
1003 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1004 struct btrfs_key *key, int nr)
1006 struct btrfs_disk_key disk_key;
1007 btrfs_node_key(eb, &disk_key, nr);
1008 btrfs_disk_key_to_cpu(key, &disk_key);
1011 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1012 struct btrfs_key *key, int nr)
1014 struct btrfs_disk_key disk_key;
1015 btrfs_item_key(eb, &disk_key, nr);
1016 btrfs_disk_key_to_cpu(key, &disk_key);
1019 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1020 struct btrfs_dir_item *item,
1021 struct btrfs_key *key)
1023 struct btrfs_disk_key disk_key;
1024 btrfs_dir_item_key(eb, item, &disk_key);
1025 btrfs_disk_key_to_cpu(key, &disk_key);
1029 static inline u8 btrfs_key_type(struct btrfs_key *key)
1034 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1039 /* struct btrfs_header */
1040 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1041 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1043 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1044 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1045 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 16);
1046 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1048 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1050 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1054 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1056 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1060 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1062 unsigned long ptr = offsetof(struct btrfs_header, csum);
1066 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1071 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1076 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1081 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1083 return (btrfs_header_level(eb) == 0);
1086 /* struct btrfs_root_item */
1087 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1088 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1089 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1091 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1092 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1093 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1094 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1095 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1096 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1097 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1099 /* struct btrfs_super_block */
1100 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1101 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1103 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1104 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1105 struct btrfs_super_block, sys_chunk_array_size, 32);
1106 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1108 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1110 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1111 chunk_root_level, 64);
1112 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1114 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1116 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1118 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1120 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1122 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1124 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1125 root_dir_objectid, 64);
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 static inline void dec_i_blocks(struct inode *inode, u64 dec)
1428 if (dec <= inode->i_blocks)
1429 inode->i_blocks -= dec;
1431 inode->i_blocks = 0;
1434 unsigned long btrfs_force_ra(struct address_space *mapping,
1435 struct file_ra_state *ra, struct file *file,
1436 pgoff_t offset, pgoff_t last_index);
1437 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1439 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1440 int btrfs_readpage(struct file *file, struct page *page);
1441 void btrfs_delete_inode(struct inode *inode);
1442 void btrfs_put_inode(struct inode *inode);
1443 void btrfs_read_locked_inode(struct inode *inode);
1444 int btrfs_write_inode(struct inode *inode, int wait);
1445 void btrfs_dirty_inode(struct inode *inode);
1446 struct inode *btrfs_alloc_inode(struct super_block *sb);
1447 void btrfs_destroy_inode(struct inode *inode);
1448 int btrfs_init_cachep(void);
1449 void btrfs_destroy_cachep(void);
1450 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1451 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1452 struct btrfs_root *root);
1453 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1455 int btrfs_commit_write(struct file *file, struct page *page,
1456 unsigned from, unsigned to);
1457 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1458 size_t page_offset, u64 start, u64 end,
1460 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1461 struct btrfs_root *root,
1462 struct inode *inode);
1464 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
1465 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1466 extern struct file_operations btrfs_file_operations;
1467 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1468 struct btrfs_root *root, struct inode *inode,
1469 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1471 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1472 struct btrfs_root *root, int cache_only);
1475 int btrfs_init_sysfs(void);
1476 void btrfs_exit_sysfs(void);
1477 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1478 int btrfs_sysfs_add_root(struct btrfs_root *root);
1479 void btrfs_sysfs_del_root(struct btrfs_root *root);
1480 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1483 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1484 int btrfs_delete_xattrs(struct btrfs_trans_handle *trans,
1485 struct btrfs_root *root, struct inode *inode);
1487 u64 btrfs_parse_size(char *str);