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/completion.h>
27 #include <linux/backing-dev.h>
28 #include <linux/wait.h>
29 #include <asm/kmap_types.h>
30 #include "bit-radix.h"
31 #include "extent_io.h"
32 #include "extent_map.h"
33 #include "async-thread.h"
35 struct btrfs_trans_handle;
36 struct btrfs_transaction;
37 extern struct kmem_cache *btrfs_trans_handle_cachep;
38 extern struct kmem_cache *btrfs_transaction_cachep;
39 extern struct kmem_cache *btrfs_bit_radix_cachep;
40 extern struct kmem_cache *btrfs_path_cachep;
41 struct btrfs_ordered_sum;
43 #define BTRFS_MAGIC "_B5RfS_M"
45 #define BTRFS_ACL_NOT_CACHED ((void *)-1)
48 # define BTRFS_MAX_LEVEL 7
50 # define BTRFS_MAX_LEVEL 8
53 /* holds pointers to all of the tree roots */
54 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
56 /* stores information about which extents are in use, and reference counts */
57 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
60 * chunk tree stores translations from logical -> physical block numbering
61 * the super block points to the chunk tree
63 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
66 * stores information about which areas of a given device are in use.
67 * one per device. The tree of tree roots points to the device tree
69 #define BTRFS_DEV_TREE_OBJECTID 4ULL
71 /* one per subvolume, storing files and directories */
72 #define BTRFS_FS_TREE_OBJECTID 5ULL
74 /* directory objectid inside the root tree */
75 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
78 * All files have objectids higher than this.
80 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
81 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
85 * the device items go into the chunk tree. The key is in the form
86 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
88 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
91 * we can actually store much bigger names, but lets not confuse the rest
94 #define BTRFS_NAME_LEN 255
96 /* 32 bytes in various csum fields */
97 #define BTRFS_CSUM_SIZE 32
98 /* four bytes for CRC32 */
99 #define BTRFS_CRC32_SIZE 4
100 #define BTRFS_EMPTY_DIR_SIZE 0
102 #define BTRFS_FT_UNKNOWN 0
103 #define BTRFS_FT_REG_FILE 1
104 #define BTRFS_FT_DIR 2
105 #define BTRFS_FT_CHRDEV 3
106 #define BTRFS_FT_BLKDEV 4
107 #define BTRFS_FT_FIFO 5
108 #define BTRFS_FT_SOCK 6
109 #define BTRFS_FT_SYMLINK 7
110 #define BTRFS_FT_XATTR 8
111 #define BTRFS_FT_MAX 9
114 * the key defines the order in the tree, and so it also defines (optimal)
115 * block layout. objectid corresonds to the inode number. The flags
116 * tells us things about the object, and is a kind of stream selector.
117 * so for a given inode, keys with flags of 1 might refer to the inode
118 * data, flags of 2 may point to file data in the btree and flags == 3
119 * may point to extents.
121 * offset is the starting byte offset for this key in the stream.
123 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
124 * in cpu native order. Otherwise they are identical and their sizes
125 * should be the same (ie both packed)
127 struct btrfs_disk_key {
131 } __attribute__ ((__packed__));
137 } __attribute__ ((__packed__));
139 struct btrfs_mapping_tree {
140 struct extent_map_tree map_tree;
143 #define BTRFS_UUID_SIZE 16
144 struct btrfs_dev_item {
145 /* the internal btrfs device id */
148 /* size of the device */
154 /* optimal io alignment for this device */
157 /* optimal io width for this device */
160 /* minimal io size for this device */
163 /* type and info about this device */
166 /* grouping information for allocation decisions */
169 /* seek speed 0-100 where 100 is fastest */
172 /* bandwidth 0-100 where 100 is fastest */
175 /* btrfs generated uuid for this device */
176 u8 uuid[BTRFS_UUID_SIZE];
177 } __attribute__ ((__packed__));
179 struct btrfs_stripe {
182 u8 dev_uuid[BTRFS_UUID_SIZE];
183 } __attribute__ ((__packed__));
186 /* size of this chunk in bytes */
189 /* objectid of the root referencing this chunk */
195 /* optimal io alignment for this chunk */
198 /* optimal io width for this chunk */
201 /* minimal io size for this chunk */
204 /* 2^16 stripes is quite a lot, a second limit is the size of a single
209 /* sub stripes only matter for raid10 */
211 struct btrfs_stripe stripe;
212 /* additional stripes go here */
213 } __attribute__ ((__packed__));
215 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
217 BUG_ON(num_stripes == 0);
218 return sizeof(struct btrfs_chunk) +
219 sizeof(struct btrfs_stripe) * (num_stripes - 1);
222 #define BTRFS_FSID_SIZE 16
223 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
226 * every tree block (leaf or node) starts with this header.
228 struct btrfs_header {
229 /* these first four must match the super block */
230 u8 csum[BTRFS_CSUM_SIZE];
231 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
232 __le64 bytenr; /* which block this node is supposed to live in */
235 /* allowed to be different from the super from here on down */
236 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
241 } __attribute__ ((__packed__));
243 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
244 sizeof(struct btrfs_header)) / \
245 sizeof(struct btrfs_key_ptr))
246 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
247 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
248 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
249 sizeof(struct btrfs_item) - \
250 sizeof(struct btrfs_file_extent_item))
254 * this is a very generous portion of the super block, giving us
255 * room to translate 14 chunks with 3 stripes each.
257 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
258 #define BTRFS_LABEL_SIZE 256
261 * the super block basically lists the main trees of the FS
262 * it currently lacks any block count etc etc
264 struct btrfs_super_block {
265 u8 csum[BTRFS_CSUM_SIZE];
266 /* the first 4 fields must match struct btrfs_header */
267 u8 fsid[16]; /* FS specific uuid */
268 __le64 bytenr; /* this block number */
271 /* allowed to be different from the btrfs_header from here own down */
278 __le64 root_dir_objectid;
284 __le32 sys_chunk_array_size;
287 struct btrfs_dev_item dev_item;
288 char label[BTRFS_LABEL_SIZE];
289 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
290 } __attribute__ ((__packed__));
293 * A leaf is full of items. offset and size tell us where to find
294 * the item in the leaf (relative to the start of the data area)
297 struct btrfs_disk_key key;
300 } __attribute__ ((__packed__));
303 * leaves have an item area and a data area:
304 * [item0, item1....itemN] [free space] [dataN...data1, data0]
306 * The data is separate from the items to get the keys closer together
310 struct btrfs_header header;
311 struct btrfs_item items[];
312 } __attribute__ ((__packed__));
315 * all non-leaf blocks are nodes, they hold only keys and pointers to
318 struct btrfs_key_ptr {
319 struct btrfs_disk_key key;
322 } __attribute__ ((__packed__));
325 struct btrfs_header header;
326 struct btrfs_key_ptr ptrs[];
327 } __attribute__ ((__packed__));
330 * btrfs_paths remember the path taken from the root down to the leaf.
331 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
332 * to any other levels that are present.
334 * The slots array records the index of the item or block pointer
335 * used while walking the tree.
338 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
339 int slots[BTRFS_MAX_LEVEL];
340 /* if there is real range locking, this locks field will change */
341 int locks[BTRFS_MAX_LEVEL];
343 /* keep some upper locks as we walk down */
350 * items in the extent btree are used to record the objectid of the
351 * owner of the block and the number of references
353 struct btrfs_extent_item {
355 } __attribute__ ((__packed__));
357 struct btrfs_extent_ref {
362 } __attribute__ ((__packed__));
364 /* dev extents record free space on individual devices. The owner
365 * field points back to the chunk allocation mapping tree that allocated
366 * the extent. The chunk tree uuid field is a way to double check the owner
368 struct btrfs_dev_extent {
370 __le64 chunk_objectid;
373 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
374 } __attribute__ ((__packed__));
376 struct btrfs_inode_ref {
380 } __attribute__ ((__packed__));
382 struct btrfs_timespec {
385 } __attribute__ ((__packed__));
388 * there is no padding here on purpose. If you want to extent the inode,
389 * make a new item type
391 struct btrfs_inode_item {
403 struct btrfs_timespec atime;
404 struct btrfs_timespec ctime;
405 struct btrfs_timespec mtime;
406 struct btrfs_timespec otime;
407 } __attribute__ ((__packed__));
409 struct btrfs_dir_item {
410 struct btrfs_disk_key location;
414 } __attribute__ ((__packed__));
416 struct btrfs_root_item {
417 struct btrfs_inode_item inode;
424 struct btrfs_disk_key drop_progress;
427 } __attribute__ ((__packed__));
429 #define BTRFS_FILE_EXTENT_REG 0
430 #define BTRFS_FILE_EXTENT_INLINE 1
432 struct btrfs_file_extent_item {
436 * disk space consumed by the extent, checksum blocks are included
440 __le64 disk_num_bytes;
442 * the logical offset in file blocks (no csums)
443 * this extent record is for. This allows a file extent to point
444 * into the middle of an existing extent on disk, sharing it
445 * between two snapshots (useful if some bytes in the middle of the
446 * extent have changed
450 * the logical number of file blocks (no csums included)
453 } __attribute__ ((__packed__));
455 struct btrfs_csum_item {
457 } __attribute__ ((__packed__));
459 /* different types of block groups (and chunks) */
460 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
461 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
462 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
463 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
464 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
465 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
466 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
469 struct btrfs_block_group_item {
471 __le64 chunk_objectid;
473 } __attribute__ ((__packed__));
475 struct btrfs_space_info {
482 struct list_head list;
485 struct btrfs_block_group_cache {
486 struct btrfs_key key;
487 struct btrfs_block_group_item item;
488 struct btrfs_space_info *space_info;
497 struct btrfs_fs_devices;
498 struct btrfs_fs_info {
499 u8 fsid[BTRFS_FSID_SIZE];
500 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
501 struct btrfs_root *extent_root;
502 struct btrfs_root *tree_root;
503 struct btrfs_root *chunk_root;
504 struct btrfs_root *dev_root;
505 struct radix_tree_root fs_roots_radix;
507 struct extent_io_tree free_space_cache;
508 struct extent_io_tree block_group_cache;
509 struct extent_io_tree pinned_extents;
510 struct extent_io_tree pending_del;
511 struct extent_io_tree extent_ins;
513 /* logical->physical extent mapping */
514 struct btrfs_mapping_tree mapping_tree;
517 u64 last_trans_committed;
518 unsigned long mount_opt;
522 struct btrfs_transaction *running_transaction;
523 wait_queue_head_t transaction_throttle;
524 wait_queue_head_t transaction_wait;
525 struct btrfs_super_block super_copy;
526 struct btrfs_super_block super_for_commit;
527 struct block_device *__bdev;
528 struct super_block *sb;
529 struct inode *btree_inode;
530 struct backing_dev_info bdi;
531 spinlock_t hash_lock;
532 struct mutex trans_mutex;
533 struct mutex transaction_kthread_mutex;
534 struct mutex cleaner_mutex;
535 struct mutex alloc_mutex;
536 struct mutex chunk_mutex;
537 struct mutex drop_mutex;
538 struct mutex volume_mutex;
539 struct list_head trans_list;
540 struct list_head hashers;
541 struct list_head dead_roots;
542 atomic_t nr_async_submits;
545 * this is used by the balancing code to wait for all the pending
548 spinlock_t ordered_extent_lock;
549 struct list_head ordered_extents;
552 * there is a pool of worker threads for checksumming during writes
553 * and a pool for checksumming after reads. This is because readers
554 * can run with FS locks held, and the writers may be waiting for
555 * those locks. We don't want ordering in the pending list to cause
556 * deadlocks, and so the two are serviced separately.
558 * A third pool does submit_bio to avoid deadlocking with the other
561 struct btrfs_workers workers;
562 struct btrfs_workers endio_workers;
563 struct btrfs_workers endio_write_workers;
564 struct btrfs_workers submit_workers;
566 * fixup workers take dirty pages that didn't properly go through
567 * the cow mechanism and make them safe to write. It happens
568 * for the sys_munmap function call path
570 struct btrfs_workers fixup_workers;
571 struct task_struct *transaction_kthread;
572 struct task_struct *cleaner_kthread;
573 int thread_pool_size;
575 struct kobject super_kobj;
576 struct completion kobj_unregister;
582 struct list_head dirty_cowonly_roots;
584 struct btrfs_fs_devices *fs_devices;
585 struct list_head space_info;
586 spinlock_t delalloc_lock;
587 spinlock_t new_trans_lock;
592 u64 avail_data_alloc_bits;
593 u64 avail_metadata_alloc_bits;
594 u64 avail_system_alloc_bits;
595 u64 data_alloc_profile;
596 u64 metadata_alloc_profile;
597 u64 system_alloc_profile;
603 * in ram representation of the tree. extent_root is used for all allocations
604 * and for the extent tree extent_root root.
607 struct extent_buffer *node;
609 /* the node lock is held while changing the node pointer */
610 spinlock_t node_lock;
612 struct extent_buffer *commit_root;
613 struct btrfs_root_item root_item;
614 struct btrfs_key root_key;
615 struct btrfs_fs_info *fs_info;
617 struct kobject root_kobj;
618 struct completion kobj_unregister;
619 struct mutex objectid_mutex;
623 /* data allocations are done in sectorsize units */
626 /* node allocations are done in nodesize units */
629 /* leaf allocations are done in leafsize units */
636 u64 last_inode_alloc;
639 u64 defrag_trans_start;
640 struct btrfs_key defrag_progress;
641 struct btrfs_key defrag_max;
647 /* the dirty list is only used by non-reference counted roots */
648 struct list_head dirty_list;
653 * inode items have the data typically returned from stat and store other
654 * info about object characteristics. There is one for every file and dir in
657 #define BTRFS_INODE_ITEM_KEY 1
658 #define BTRFS_INODE_REF_KEY 2
659 #define BTRFS_XATTR_ITEM_KEY 8
660 /* reserve 2-15 close to the inode for later flexibility */
663 * dir items are the name -> inode pointers in a directory. There is one
664 * for every name in a directory.
666 #define BTRFS_DIR_ITEM_KEY 16
667 #define BTRFS_DIR_INDEX_KEY 17
669 * extent data is for file data
671 #define BTRFS_EXTENT_DATA_KEY 18
673 * csum items have the checksums for data in the extents
675 #define BTRFS_CSUM_ITEM_KEY 19
677 /* reserve 20-31 for other file stuff */
680 * root items point to tree roots. There are typically in the root
681 * tree used by the super block to find all the other trees
683 #define BTRFS_ROOT_ITEM_KEY 32
685 * extent items are in the extent map tree. These record which blocks
686 * are used, and how many references there are to each block
688 #define BTRFS_EXTENT_ITEM_KEY 33
689 #define BTRFS_EXTENT_REF_KEY 34
692 * block groups give us hints into the extent allocation trees. Which
693 * blocks are free etc etc
695 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
697 #define BTRFS_DEV_EXTENT_KEY 75
698 #define BTRFS_DEV_ITEM_KEY 76
699 #define BTRFS_CHUNK_ITEM_KEY 77
702 * string items are for debugging. They just store a short string of
705 #define BTRFS_STRING_ITEM_KEY 253
707 #define BTRFS_MOUNT_NODATASUM (1 << 0)
708 #define BTRFS_MOUNT_NODATACOW (1 << 1)
709 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
710 #define BTRFS_MOUNT_SSD (1 << 3)
711 #define BTRFS_MOUNT_DEGRADED (1 << 4)
713 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
714 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
715 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
720 #define BTRFS_INODE_NODATASUM (1 << 0)
721 #define BTRFS_INODE_NODATACOW (1 << 1)
722 #define BTRFS_INODE_READONLY (1 << 2)
723 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
725 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
727 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
729 /* some macros to generate set/get funcs for the struct fields. This
730 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
733 #define le8_to_cpu(v) (v)
734 #define cpu_to_le8(v) (v)
737 #define read_eb_member(eb, ptr, type, member, result) ( \
738 read_extent_buffer(eb, (char *)(result), \
739 ((unsigned long)(ptr)) + \
740 offsetof(type, member), \
741 sizeof(((type *)0)->member)))
743 #define write_eb_member(eb, ptr, type, member, result) ( \
744 write_extent_buffer(eb, (char *)(result), \
745 ((unsigned long)(ptr)) + \
746 offsetof(type, member), \
747 sizeof(((type *)0)->member)))
749 #ifndef BTRFS_SETGET_FUNCS
750 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
751 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
752 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
755 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
756 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
758 type *p = kmap_atomic(eb->first_page, KM_USER0); \
759 u##bits res = le##bits##_to_cpu(p->member); \
760 kunmap_atomic(p, KM_USER0); \
763 static inline void btrfs_set_##name(struct extent_buffer *eb, \
766 type *p = kmap_atomic(eb->first_page, KM_USER0); \
767 p->member = cpu_to_le##bits(val); \
768 kunmap_atomic(p, KM_USER0); \
771 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
772 static inline u##bits btrfs_##name(type *s) \
774 return le##bits##_to_cpu(s->member); \
776 static inline void btrfs_set_##name(type *s, u##bits val) \
778 s->member = cpu_to_le##bits(val); \
781 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
782 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
783 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
784 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
785 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
786 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
787 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
788 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
789 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
790 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
792 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
793 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
795 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
797 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
799 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
801 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
803 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
804 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
806 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
808 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
811 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
813 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
816 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
817 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
818 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
819 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
820 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
821 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
822 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
823 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
824 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
825 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
826 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
828 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
830 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
833 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
834 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
835 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
837 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
839 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
841 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
843 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
844 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
846 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
848 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
849 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
851 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
854 unsigned long offset = (unsigned long)c;
855 offset += offsetof(struct btrfs_chunk, stripe);
856 offset += nr * sizeof(struct btrfs_stripe);
857 return (struct btrfs_stripe *)offset;
860 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
862 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
865 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
866 struct btrfs_chunk *c, int nr)
868 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
871 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
872 struct btrfs_chunk *c, int nr,
875 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
878 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
879 struct btrfs_chunk *c, int nr)
881 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
884 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
885 struct btrfs_chunk *c, int nr,
888 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
891 /* struct btrfs_block_group_item */
892 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
894 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
896 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
897 struct btrfs_block_group_item, chunk_objectid, 64);
899 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
900 struct btrfs_block_group_item, chunk_objectid, 64);
901 BTRFS_SETGET_FUNCS(disk_block_group_flags,
902 struct btrfs_block_group_item, flags, 64);
903 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
904 struct btrfs_block_group_item, flags, 64);
906 /* struct btrfs_inode_ref */
907 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
908 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
910 /* struct btrfs_inode_item */
911 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
912 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
913 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
914 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
915 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
916 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
917 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
918 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
919 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
920 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
921 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
924 static inline struct btrfs_timespec *
925 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
927 unsigned long ptr = (unsigned long)inode_item;
928 ptr += offsetof(struct btrfs_inode_item, atime);
929 return (struct btrfs_timespec *)ptr;
932 static inline struct btrfs_timespec *
933 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
935 unsigned long ptr = (unsigned long)inode_item;
936 ptr += offsetof(struct btrfs_inode_item, mtime);
937 return (struct btrfs_timespec *)ptr;
940 static inline struct btrfs_timespec *
941 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
943 unsigned long ptr = (unsigned long)inode_item;
944 ptr += offsetof(struct btrfs_inode_item, ctime);
945 return (struct btrfs_timespec *)ptr;
948 static inline struct btrfs_timespec *
949 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
951 unsigned long ptr = (unsigned long)inode_item;
952 ptr += offsetof(struct btrfs_inode_item, otime);
953 return (struct btrfs_timespec *)ptr;
956 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
957 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
959 /* struct btrfs_extent_item */
960 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
962 /* struct btrfs_dev_extent */
963 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
965 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
967 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
969 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
971 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
973 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
974 return (u8 *)((unsigned long)dev + ptr);
977 /* struct btrfs_extent_ref */
978 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
979 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
980 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
981 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
983 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
984 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
986 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
988 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
990 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
993 /* struct btrfs_node */
994 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
995 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
997 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1000 ptr = offsetof(struct btrfs_node, ptrs) +
1001 sizeof(struct btrfs_key_ptr) * nr;
1002 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1005 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1009 ptr = offsetof(struct btrfs_node, ptrs) +
1010 sizeof(struct btrfs_key_ptr) * nr;
1011 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1014 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1017 ptr = offsetof(struct btrfs_node, ptrs) +
1018 sizeof(struct btrfs_key_ptr) * nr;
1019 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1022 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1026 ptr = offsetof(struct btrfs_node, ptrs) +
1027 sizeof(struct btrfs_key_ptr) * nr;
1028 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1031 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1033 return offsetof(struct btrfs_node, ptrs) +
1034 sizeof(struct btrfs_key_ptr) * nr;
1037 void btrfs_node_key(struct extent_buffer *eb,
1038 struct btrfs_disk_key *disk_key, int nr);
1040 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1041 struct btrfs_disk_key *disk_key, int nr)
1044 ptr = btrfs_node_key_ptr_offset(nr);
1045 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1046 struct btrfs_key_ptr, key, disk_key);
1049 /* struct btrfs_item */
1050 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1051 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1053 static inline unsigned long btrfs_item_nr_offset(int nr)
1055 return offsetof(struct btrfs_leaf, items) +
1056 sizeof(struct btrfs_item) * nr;
1059 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1062 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1065 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1066 struct btrfs_item *item)
1068 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1071 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1073 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1076 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1078 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1081 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1083 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1086 static inline void btrfs_item_key(struct extent_buffer *eb,
1087 struct btrfs_disk_key *disk_key, int nr)
1089 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1090 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1093 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1094 struct btrfs_disk_key *disk_key, int nr)
1096 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1097 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1100 /* struct btrfs_dir_item */
1101 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1102 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1103 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1105 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1106 struct btrfs_dir_item *item,
1107 struct btrfs_disk_key *key)
1109 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1112 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1113 struct btrfs_dir_item *item,
1114 struct btrfs_disk_key *key)
1116 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1119 /* struct btrfs_disk_key */
1120 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1122 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1123 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1125 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1126 struct btrfs_disk_key *disk)
1128 cpu->offset = le64_to_cpu(disk->offset);
1129 cpu->type = disk->type;
1130 cpu->objectid = le64_to_cpu(disk->objectid);
1133 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1134 struct btrfs_key *cpu)
1136 disk->offset = cpu_to_le64(cpu->offset);
1137 disk->type = cpu->type;
1138 disk->objectid = cpu_to_le64(cpu->objectid);
1141 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1142 struct btrfs_key *key, int nr)
1144 struct btrfs_disk_key disk_key;
1145 btrfs_node_key(eb, &disk_key, nr);
1146 btrfs_disk_key_to_cpu(key, &disk_key);
1149 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1150 struct btrfs_key *key, int nr)
1152 struct btrfs_disk_key disk_key;
1153 btrfs_item_key(eb, &disk_key, nr);
1154 btrfs_disk_key_to_cpu(key, &disk_key);
1157 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1158 struct btrfs_dir_item *item,
1159 struct btrfs_key *key)
1161 struct btrfs_disk_key disk_key;
1162 btrfs_dir_item_key(eb, item, &disk_key);
1163 btrfs_disk_key_to_cpu(key, &disk_key);
1167 static inline u8 btrfs_key_type(struct btrfs_key *key)
1172 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1177 /* struct btrfs_header */
1178 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1179 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1181 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1182 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1183 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1184 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1186 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1188 return (btrfs_header_flags(eb) & flag) == flag;
1191 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1193 u64 flags = btrfs_header_flags(eb);
1194 btrfs_set_header_flags(eb, flags | flag);
1195 return (flags & flag) == flag;
1198 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1200 u64 flags = btrfs_header_flags(eb);
1201 btrfs_set_header_flags(eb, flags & ~flag);
1202 return (flags & flag) == flag;
1205 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1207 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1211 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1213 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1217 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1219 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1223 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1225 unsigned long ptr = offsetof(struct btrfs_header, csum);
1229 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1234 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1239 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1244 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1246 return (btrfs_header_level(eb) == 0);
1249 /* struct btrfs_root_item */
1250 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1251 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1252 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1254 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1255 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1256 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1257 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1258 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1259 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1260 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1262 /* struct btrfs_super_block */
1263 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1264 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1265 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1267 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1268 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1269 struct btrfs_super_block, sys_chunk_array_size, 32);
1270 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1272 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1274 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1275 chunk_root_level, 64);
1276 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1278 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1280 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1282 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1284 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1286 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1288 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1289 root_dir_objectid, 64);
1290 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1293 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1295 return offsetof(struct btrfs_leaf, items);
1298 /* struct btrfs_file_extent_item */
1299 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1301 static inline unsigned long btrfs_file_extent_inline_start(struct
1302 btrfs_file_extent_item *e)
1304 unsigned long offset = (unsigned long)e;
1305 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1309 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1311 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1314 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1315 struct btrfs_item *e)
1317 unsigned long offset;
1318 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1319 return btrfs_item_size(eb, e) - offset;
1322 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1324 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1326 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1327 disk_num_bytes, 64);
1328 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1330 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1333 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1335 return sb->s_fs_info;
1338 static inline int btrfs_set_root_name(struct btrfs_root *root,
1339 const char *name, int len)
1341 /* if we already have a name just free it */
1345 root->name = kmalloc(len+1, GFP_KERNEL);
1349 memcpy(root->name, name, len);
1350 root->name[len] ='\0';
1355 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1357 return root->leafsize;
1358 return root->nodesize;
1361 /* helper function to cast into the data area of the leaf. */
1362 #define btrfs_item_ptr(leaf, slot, type) \
1363 ((type *)(btrfs_leaf_data(leaf) + \
1364 btrfs_item_offset_nr(leaf, slot)))
1366 #define btrfs_item_ptr_offset(leaf, slot) \
1367 ((unsigned long)(btrfs_leaf_data(leaf) + \
1368 btrfs_item_offset_nr(leaf, slot)))
1370 static inline struct dentry *fdentry(struct file *file) {
1371 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1372 return file->f_dentry;
1374 return file->f_path.dentry;
1379 u32 btrfs_count_snapshots_in_path(struct btrfs_root *root,
1380 struct btrfs_path *count_path,
1381 u64 expected_owner, u64 first_extent);
1382 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1383 struct btrfs_root *root);
1384 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1385 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1386 btrfs_fs_info *info,
1388 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1389 struct btrfs_block_group_cache
1390 *hint, u64 search_start,
1391 int data, int owner);
1392 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1393 struct btrfs_root *root,
1401 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1402 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1403 struct btrfs_root *root,
1404 struct btrfs_path *path, u64 bytenr,
1405 u64 root_objectid, u64 ref_generation,
1406 u64 owner, u64 owner_offset);
1407 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1408 struct btrfs_root *root,
1409 u64 num_bytes, u64 min_bytes,
1410 u64 root_objectid, u64 ref_generation,
1411 u64 owner, u64 owner_offset,
1412 u64 empty_size, u64 hint_byte,
1413 u64 search_end, struct btrfs_key *ins, u64 data);
1414 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1415 struct btrfs_root *root,
1416 u64 root_objectid, u64 ref_generation,
1417 u64 owner, u64 owner_offset,
1418 struct btrfs_key *ins);
1419 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1420 struct btrfs_root *root,
1421 u64 num_bytes, u64 min_alloc_size,
1422 u64 empty_size, u64 hint_byte,
1423 u64 search_end, struct btrfs_key *ins,
1425 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1426 struct extent_buffer *buf);
1427 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1428 *root, u64 bytenr, u64 num_bytes,
1429 u64 root_objectid, u64 ref_generation,
1430 u64 owner_objectid, u64 owner_offset, int pin);
1431 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1432 struct btrfs_root *root,
1433 struct extent_io_tree *unpin);
1434 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1435 struct btrfs_root *root,
1436 u64 bytenr, u64 num_bytes,
1437 u64 root_objectid, u64 ref_generation,
1438 u64 owner, u64 owner_offset);
1439 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1440 struct btrfs_root *root);
1441 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1442 int btrfs_read_block_groups(struct btrfs_root *root);
1443 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1444 struct btrfs_root *root, u64 bytes_used,
1445 u64 type, u64 chunk_objectid, u64 chunk_offset,
1448 int btrfs_previous_item(struct btrfs_root *root,
1449 struct btrfs_path *path, u64 min_objectid,
1452 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1453 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1454 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1455 struct btrfs_key *key, int lowest_level,
1456 int cache_only, u64 min_trans);
1457 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1458 struct btrfs_path *path, int cache_only,
1461 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1462 struct btrfs_root *root, struct extent_buffer *buf,
1463 struct extent_buffer *parent, int parent_slot,
1464 struct extent_buffer **cow_ret);
1465 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1466 struct btrfs_root *root,
1467 struct extent_buffer *buf,
1468 struct extent_buffer **cow_ret, u64 new_root_objectid);
1469 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1470 *root, struct btrfs_path *path, u32 data_size);
1471 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1472 struct btrfs_root *root,
1473 struct btrfs_path *path,
1474 u32 new_size, int from_end);
1475 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1476 *root, struct btrfs_key *key, struct btrfs_path *p, int
1478 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1479 struct btrfs_root *root, struct extent_buffer *parent,
1480 int start_slot, int cache_only, u64 *last_ret,
1481 struct btrfs_key *progress);
1482 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1483 struct btrfs_path *btrfs_alloc_path(void);
1484 void btrfs_free_path(struct btrfs_path *p);
1485 void btrfs_init_path(struct btrfs_path *p);
1486 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1487 struct btrfs_path *path, int slot, int nr);
1489 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1490 struct btrfs_root *root,
1491 struct btrfs_path *path)
1493 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1496 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1497 *root, struct btrfs_key *key, void *data, u32 data_size);
1498 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1499 struct btrfs_root *root,
1500 struct btrfs_path *path,
1501 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1503 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1504 struct btrfs_root *root,
1505 struct btrfs_path *path,
1506 struct btrfs_key *key,
1509 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1512 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1513 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1514 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1515 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1518 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1519 struct btrfs_key *key);
1520 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1521 *root, struct btrfs_key *key, struct btrfs_root_item
1523 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1524 *root, struct btrfs_key *key, struct btrfs_root_item
1526 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1527 btrfs_root_item *item, struct btrfs_key *key);
1528 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1529 u64 *found_objectid);
1530 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1531 struct btrfs_root *latest_root);
1533 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1534 *root, const char *name, int name_len, u64 dir,
1535 struct btrfs_key *location, u8 type, u64 index);
1536 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1537 struct btrfs_root *root,
1538 struct btrfs_path *path, u64 dir,
1539 const char *name, int name_len,
1541 struct btrfs_dir_item *
1542 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1543 struct btrfs_root *root,
1544 struct btrfs_path *path, u64 dir,
1545 u64 objectid, const char *name, int name_len,
1547 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1548 struct btrfs_path *path,
1549 const char *name, int name_len);
1550 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1551 struct btrfs_root *root,
1552 struct btrfs_path *path,
1553 struct btrfs_dir_item *di);
1554 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1555 struct btrfs_root *root, const char *name,
1556 u16 name_len, const void *data, u16 data_len,
1558 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1559 struct btrfs_root *root,
1560 struct btrfs_path *path, u64 dir,
1561 const char *name, u16 name_len,
1564 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1565 struct btrfs_root *fs_root,
1566 u64 dirid, u64 *objectid);
1567 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1570 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1571 struct btrfs_root *root,
1572 const char *name, int name_len,
1573 u64 inode_objectid, u64 ref_objectid, u64 index);
1574 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1575 struct btrfs_root *root,
1576 const char *name, int name_len,
1577 u64 inode_objectid, u64 ref_objectid, u64 *index);
1578 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1579 struct btrfs_root *root,
1580 struct btrfs_path *path, u64 objectid);
1581 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1582 *root, struct btrfs_path *path,
1583 struct btrfs_key *location, int mod);
1586 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1587 struct btrfs_root *root,
1588 u64 objectid, u64 pos, u64 disk_offset,
1590 u64 num_bytes, u64 offset);
1591 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1592 struct btrfs_root *root,
1593 struct btrfs_path *path, u64 objectid,
1594 u64 bytenr, int mod);
1595 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1596 struct btrfs_root *root, struct inode *inode,
1597 struct btrfs_ordered_sum *sums);
1598 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
1600 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1601 struct btrfs_root *root,
1602 struct btrfs_path *path,
1603 u64 objectid, u64 offset,
1605 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1606 struct btrfs_root *root, struct btrfs_path *path,
1610 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1611 #ifdef ClearPageFsMisc
1612 #define ClearPageChecked ClearPageFsMisc
1613 #define SetPageChecked SetPageFsMisc
1614 #define PageChecked PageFsMisc
1617 int btrfs_writepages(struct address_space *mapping,
1618 struct writeback_control *wbc);
1619 int btrfs_create_subvol_root(struct btrfs_root *new_root,
1620 struct btrfs_trans_handle *trans, u64 new_dirid,
1621 struct btrfs_block_group_cache *block_group);
1623 void btrfs_invalidate_dcache_root(struct btrfs_root *root, char *name,
1626 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1627 size_t size, struct bio *bio);
1629 static inline void dec_i_blocks(struct inode *inode, u64 dec)
1632 if (dec <= inode->i_blocks)
1633 inode->i_blocks -= dec;
1635 inode->i_blocks = 0;
1638 unsigned long btrfs_force_ra(struct address_space *mapping,
1639 struct file_ra_state *ra, struct file *file,
1640 pgoff_t offset, pgoff_t last_index);
1641 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1643 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1644 int btrfs_readpage(struct file *file, struct page *page);
1645 void btrfs_delete_inode(struct inode *inode);
1646 void btrfs_put_inode(struct inode *inode);
1647 void btrfs_read_locked_inode(struct inode *inode);
1648 int btrfs_write_inode(struct inode *inode, int wait);
1649 void btrfs_dirty_inode(struct inode *inode);
1650 struct inode *btrfs_alloc_inode(struct super_block *sb);
1651 void btrfs_destroy_inode(struct inode *inode);
1652 int btrfs_init_cachep(void);
1653 void btrfs_destroy_cachep(void);
1654 long btrfs_ioctl_trans_end(struct file *file);
1655 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1656 struct btrfs_root *root);
1657 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1659 int btrfs_commit_write(struct file *file, struct page *page,
1660 unsigned from, unsigned to);
1661 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1662 size_t page_offset, u64 start, u64 end,
1664 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1665 struct btrfs_root *root,
1666 struct inode *inode);
1669 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1672 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
1673 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1674 extern struct file_operations btrfs_file_operations;
1675 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1676 struct btrfs_root *root, struct inode *inode,
1677 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1678 int btrfs_release_file(struct inode *inode, struct file *file);
1681 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1682 struct btrfs_root *root, int cache_only);
1685 int btrfs_init_sysfs(void);
1686 void btrfs_exit_sysfs(void);
1687 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1688 int btrfs_sysfs_add_root(struct btrfs_root *root);
1689 void btrfs_sysfs_del_root(struct btrfs_root *root);
1690 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1693 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1696 u64 btrfs_parse_size(char *str);
1697 int btrfs_parse_options(struct btrfs_root *root, char *options);
1698 int btrfs_sync_fs(struct super_block *sb, int wait);
1701 int btrfs_check_acl(struct inode *inode, int mask);
1702 int btrfs_init_acl(struct inode *inode, struct inode *dir);
1703 int btrfs_acl_chmod(struct inode *inode);