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 "_B6RfS_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
77 /* orhpan objectid for tracking unlinked/truncated files */
78 #define BTRFS_ORPHAN_OBJECTID -5ULL
81 * All files have objectids higher than this.
83 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
84 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
88 * the device items go into the chunk tree. The key is in the form
89 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
91 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
94 * we can actually store much bigger names, but lets not confuse the rest
97 #define BTRFS_NAME_LEN 255
99 /* 32 bytes in various csum fields */
100 #define BTRFS_CSUM_SIZE 32
101 /* four bytes for CRC32 */
102 #define BTRFS_CRC32_SIZE 4
103 #define BTRFS_EMPTY_DIR_SIZE 0
105 #define BTRFS_FT_UNKNOWN 0
106 #define BTRFS_FT_REG_FILE 1
107 #define BTRFS_FT_DIR 2
108 #define BTRFS_FT_CHRDEV 3
109 #define BTRFS_FT_BLKDEV 4
110 #define BTRFS_FT_FIFO 5
111 #define BTRFS_FT_SOCK 6
112 #define BTRFS_FT_SYMLINK 7
113 #define BTRFS_FT_XATTR 8
114 #define BTRFS_FT_MAX 9
117 * the key defines the order in the tree, and so it also defines (optimal)
118 * block layout. objectid corresonds to the inode number. The flags
119 * tells us things about the object, and is a kind of stream selector.
120 * so for a given inode, keys with flags of 1 might refer to the inode
121 * data, flags of 2 may point to file data in the btree and flags == 3
122 * may point to extents.
124 * offset is the starting byte offset for this key in the stream.
126 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
127 * in cpu native order. Otherwise they are identical and their sizes
128 * should be the same (ie both packed)
130 struct btrfs_disk_key {
134 } __attribute__ ((__packed__));
140 } __attribute__ ((__packed__));
142 struct btrfs_mapping_tree {
143 struct extent_map_tree map_tree;
146 #define BTRFS_UUID_SIZE 16
147 struct btrfs_dev_item {
148 /* the internal btrfs device id */
151 /* size of the device */
157 /* optimal io alignment for this device */
160 /* optimal io width for this device */
163 /* minimal io size for this device */
166 /* type and info about this device */
169 /* grouping information for allocation decisions */
172 /* seek speed 0-100 where 100 is fastest */
175 /* bandwidth 0-100 where 100 is fastest */
178 /* btrfs generated uuid for this device */
179 u8 uuid[BTRFS_UUID_SIZE];
180 } __attribute__ ((__packed__));
182 struct btrfs_stripe {
185 u8 dev_uuid[BTRFS_UUID_SIZE];
186 } __attribute__ ((__packed__));
189 /* size of this chunk in bytes */
192 /* objectid of the root referencing this chunk */
198 /* optimal io alignment for this chunk */
201 /* optimal io width for this chunk */
204 /* minimal io size for this chunk */
207 /* 2^16 stripes is quite a lot, a second limit is the size of a single
212 /* sub stripes only matter for raid10 */
214 struct btrfs_stripe stripe;
215 /* additional stripes go here */
216 } __attribute__ ((__packed__));
218 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
220 BUG_ON(num_stripes == 0);
221 return sizeof(struct btrfs_chunk) +
222 sizeof(struct btrfs_stripe) * (num_stripes - 1);
225 #define BTRFS_FSID_SIZE 16
226 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
229 * every tree block (leaf or node) starts with this header.
231 struct btrfs_header {
232 /* these first four must match the super block */
233 u8 csum[BTRFS_CSUM_SIZE];
234 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
235 __le64 bytenr; /* which block this node is supposed to live in */
238 /* allowed to be different from the super from here on down */
239 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
244 } __attribute__ ((__packed__));
246 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
247 sizeof(struct btrfs_header)) / \
248 sizeof(struct btrfs_key_ptr))
249 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
250 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
251 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
252 sizeof(struct btrfs_item) - \
253 sizeof(struct btrfs_file_extent_item))
257 * this is a very generous portion of the super block, giving us
258 * room to translate 14 chunks with 3 stripes each.
260 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
261 #define BTRFS_LABEL_SIZE 256
264 * the super block basically lists the main trees of the FS
265 * it currently lacks any block count etc etc
267 struct btrfs_super_block {
268 u8 csum[BTRFS_CSUM_SIZE];
269 /* the first 4 fields must match struct btrfs_header */
270 u8 fsid[16]; /* FS specific uuid */
271 __le64 bytenr; /* this block number */
274 /* allowed to be different from the btrfs_header from here own down */
281 __le64 root_dir_objectid;
287 __le32 sys_chunk_array_size;
290 struct btrfs_dev_item dev_item;
291 char label[BTRFS_LABEL_SIZE];
292 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
293 } __attribute__ ((__packed__));
296 * A leaf is full of items. offset and size tell us where to find
297 * the item in the leaf (relative to the start of the data area)
300 struct btrfs_disk_key key;
303 } __attribute__ ((__packed__));
306 * leaves have an item area and a data area:
307 * [item0, item1....itemN] [free space] [dataN...data1, data0]
309 * The data is separate from the items to get the keys closer together
313 struct btrfs_header header;
314 struct btrfs_item items[];
315 } __attribute__ ((__packed__));
318 * all non-leaf blocks are nodes, they hold only keys and pointers to
321 struct btrfs_key_ptr {
322 struct btrfs_disk_key key;
325 } __attribute__ ((__packed__));
328 struct btrfs_header header;
329 struct btrfs_key_ptr ptrs[];
330 } __attribute__ ((__packed__));
333 * btrfs_paths remember the path taken from the root down to the leaf.
334 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
335 * to any other levels that are present.
337 * The slots array records the index of the item or block pointer
338 * used while walking the tree.
341 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
342 int slots[BTRFS_MAX_LEVEL];
343 /* if there is real range locking, this locks field will change */
344 int locks[BTRFS_MAX_LEVEL];
346 /* keep some upper locks as we walk down */
353 * items in the extent btree are used to record the objectid of the
354 * owner of the block and the number of references
356 struct btrfs_extent_item {
358 } __attribute__ ((__packed__));
360 struct btrfs_extent_ref {
365 } __attribute__ ((__packed__));
367 /* dev extents record free space on individual devices. The owner
368 * field points back to the chunk allocation mapping tree that allocated
369 * the extent. The chunk tree uuid field is a way to double check the owner
371 struct btrfs_dev_extent {
373 __le64 chunk_objectid;
376 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
377 } __attribute__ ((__packed__));
379 struct btrfs_inode_ref {
383 } __attribute__ ((__packed__));
385 struct btrfs_timespec {
388 } __attribute__ ((__packed__));
391 * there is no padding here on purpose. If you want to extent the inode,
392 * make a new item type
394 struct btrfs_inode_item {
406 struct btrfs_timespec atime;
407 struct btrfs_timespec ctime;
408 struct btrfs_timespec mtime;
409 struct btrfs_timespec otime;
410 } __attribute__ ((__packed__));
412 struct btrfs_dir_item {
413 struct btrfs_disk_key location;
417 } __attribute__ ((__packed__));
419 struct btrfs_root_item {
420 struct btrfs_inode_item inode;
427 struct btrfs_disk_key drop_progress;
430 } __attribute__ ((__packed__));
432 #define BTRFS_FILE_EXTENT_REG 0
433 #define BTRFS_FILE_EXTENT_INLINE 1
435 struct btrfs_file_extent_item {
439 * disk space consumed by the extent, checksum blocks are included
443 __le64 disk_num_bytes;
445 * the logical offset in file blocks (no csums)
446 * this extent record is for. This allows a file extent to point
447 * into the middle of an existing extent on disk, sharing it
448 * between two snapshots (useful if some bytes in the middle of the
449 * extent have changed
453 * the logical number of file blocks (no csums included)
456 } __attribute__ ((__packed__));
458 struct btrfs_csum_item {
460 } __attribute__ ((__packed__));
462 /* different types of block groups (and chunks) */
463 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
464 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
465 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
466 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
467 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
468 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
469 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
472 struct btrfs_block_group_item {
474 __le64 chunk_objectid;
476 } __attribute__ ((__packed__));
478 struct btrfs_space_info {
485 struct list_head list;
488 struct btrfs_block_group_cache {
489 struct btrfs_key key;
490 struct btrfs_block_group_item item;
491 struct btrfs_space_info *space_info;
500 struct btrfs_fs_devices;
501 struct btrfs_fs_info {
502 u8 fsid[BTRFS_FSID_SIZE];
503 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
504 struct btrfs_root *extent_root;
505 struct btrfs_root *tree_root;
506 struct btrfs_root *chunk_root;
507 struct btrfs_root *dev_root;
508 struct radix_tree_root fs_roots_radix;
510 struct extent_io_tree free_space_cache;
511 struct extent_io_tree block_group_cache;
512 struct extent_io_tree pinned_extents;
513 struct extent_io_tree pending_del;
514 struct extent_io_tree extent_ins;
516 /* logical->physical extent mapping */
517 struct btrfs_mapping_tree mapping_tree;
520 u64 last_trans_committed;
521 u64 open_ioctl_trans;
522 unsigned long mount_opt;
526 struct btrfs_transaction *running_transaction;
527 wait_queue_head_t transaction_throttle;
528 wait_queue_head_t transaction_wait;
529 wait_queue_head_t async_submit_wait;
530 struct btrfs_super_block super_copy;
531 struct btrfs_super_block super_for_commit;
532 struct block_device *__bdev;
533 struct super_block *sb;
534 struct inode *btree_inode;
535 struct backing_dev_info bdi;
536 spinlock_t hash_lock;
537 struct mutex trans_mutex;
538 struct mutex transaction_kthread_mutex;
539 struct mutex cleaner_mutex;
540 struct mutex alloc_mutex;
541 struct mutex chunk_mutex;
542 struct mutex drop_mutex;
543 struct mutex volume_mutex;
544 struct list_head trans_list;
545 struct list_head hashers;
546 struct list_head dead_roots;
547 atomic_t nr_async_submits;
548 atomic_t nr_async_bios;
551 * this is used by the balancing code to wait for all the pending
554 spinlock_t ordered_extent_lock;
555 struct list_head ordered_extents;
556 struct list_head delalloc_inodes;
559 * there is a pool of worker threads for checksumming during writes
560 * and a pool for checksumming after reads. This is because readers
561 * can run with FS locks held, and the writers may be waiting for
562 * those locks. We don't want ordering in the pending list to cause
563 * deadlocks, and so the two are serviced separately.
565 * A third pool does submit_bio to avoid deadlocking with the other
568 struct btrfs_workers workers;
569 struct btrfs_workers endio_workers;
570 struct btrfs_workers endio_write_workers;
571 struct btrfs_workers submit_workers;
573 * fixup workers take dirty pages that didn't properly go through
574 * the cow mechanism and make them safe to write. It happens
575 * for the sys_munmap function call path
577 struct btrfs_workers fixup_workers;
578 struct task_struct *transaction_kthread;
579 struct task_struct *cleaner_kthread;
580 int thread_pool_size;
582 struct kobject super_kobj;
583 struct completion kobj_unregister;
587 atomic_t throttle_gen;
590 struct list_head dirty_cowonly_roots;
592 struct btrfs_fs_devices *fs_devices;
593 struct list_head space_info;
594 spinlock_t delalloc_lock;
595 spinlock_t new_trans_lock;
600 spinlock_t ref_cache_lock;
601 u64 total_ref_cache_size;
603 u64 avail_data_alloc_bits;
604 u64 avail_metadata_alloc_bits;
605 u64 avail_system_alloc_bits;
606 u64 data_alloc_profile;
607 u64 metadata_alloc_profile;
608 u64 system_alloc_profile;
613 struct btrfs_leaf_ref_tree {
615 struct btrfs_leaf_ref *last;
616 struct list_head list;
621 * in ram representation of the tree. extent_root is used for all allocations
622 * and for the extent tree extent_root root.
624 struct btrfs_dirty_root;
626 struct extent_buffer *node;
628 /* the node lock is held while changing the node pointer */
629 spinlock_t node_lock;
631 struct extent_buffer *commit_root;
632 struct btrfs_leaf_ref_tree *ref_tree;
633 struct btrfs_leaf_ref_tree ref_tree_struct;
634 struct btrfs_dirty_root *dirty_root;
636 struct btrfs_root_item root_item;
637 struct btrfs_key root_key;
638 struct btrfs_fs_info *fs_info;
640 struct kobject root_kobj;
641 struct completion kobj_unregister;
642 struct mutex objectid_mutex;
647 /* data allocations are done in sectorsize units */
650 /* node allocations are done in nodesize units */
653 /* leaf allocations are done in leafsize units */
660 u64 last_inode_alloc;
663 u64 defrag_trans_start;
664 struct btrfs_key defrag_progress;
665 struct btrfs_key defrag_max;
671 /* the dirty list is only used by non-reference counted roots */
672 struct list_head dirty_list;
674 spinlock_t list_lock;
675 struct list_head dead_list;
676 struct list_head orphan_list;
681 * inode items have the data typically returned from stat and store other
682 * info about object characteristics. There is one for every file and dir in
685 #define BTRFS_INODE_ITEM_KEY 1
686 #define BTRFS_INODE_REF_KEY 2
687 #define BTRFS_XATTR_ITEM_KEY 8
688 #define BTRFS_ORPHAN_ITEM_KEY 9
689 /* reserve 2-15 close to the inode for later flexibility */
692 * dir items are the name -> inode pointers in a directory. There is one
693 * for every name in a directory.
695 #define BTRFS_DIR_ITEM_KEY 16
696 #define BTRFS_DIR_INDEX_KEY 17
698 * extent data is for file data
700 #define BTRFS_EXTENT_DATA_KEY 18
702 * csum items have the checksums for data in the extents
704 #define BTRFS_CSUM_ITEM_KEY 19
706 /* reserve 20-31 for other file stuff */
709 * root items point to tree roots. There are typically in the root
710 * tree used by the super block to find all the other trees
712 #define BTRFS_ROOT_ITEM_KEY 32
714 * extent items are in the extent map tree. These record which blocks
715 * are used, and how many references there are to each block
717 #define BTRFS_EXTENT_ITEM_KEY 33
718 #define BTRFS_EXTENT_REF_KEY 34
721 * block groups give us hints into the extent allocation trees. Which
722 * blocks are free etc etc
724 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
726 #define BTRFS_DEV_EXTENT_KEY 75
727 #define BTRFS_DEV_ITEM_KEY 76
728 #define BTRFS_CHUNK_ITEM_KEY 77
731 * string items are for debugging. They just store a short string of
734 #define BTRFS_STRING_ITEM_KEY 253
736 #define BTRFS_MOUNT_NODATASUM (1 << 0)
737 #define BTRFS_MOUNT_NODATACOW (1 << 1)
738 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
739 #define BTRFS_MOUNT_SSD (1 << 3)
740 #define BTRFS_MOUNT_DEGRADED (1 << 4)
742 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
743 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
744 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
749 #define BTRFS_INODE_NODATASUM (1 << 0)
750 #define BTRFS_INODE_NODATACOW (1 << 1)
751 #define BTRFS_INODE_READONLY (1 << 2)
752 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
754 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
756 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
758 /* some macros to generate set/get funcs for the struct fields. This
759 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
762 #define le8_to_cpu(v) (v)
763 #define cpu_to_le8(v) (v)
766 #define read_eb_member(eb, ptr, type, member, result) ( \
767 read_extent_buffer(eb, (char *)(result), \
768 ((unsigned long)(ptr)) + \
769 offsetof(type, member), \
770 sizeof(((type *)0)->member)))
772 #define write_eb_member(eb, ptr, type, member, result) ( \
773 write_extent_buffer(eb, (char *)(result), \
774 ((unsigned long)(ptr)) + \
775 offsetof(type, member), \
776 sizeof(((type *)0)->member)))
778 #ifndef BTRFS_SETGET_FUNCS
779 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
780 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
781 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
784 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
785 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
787 type *p = kmap_atomic(eb->first_page, KM_USER0); \
788 u##bits res = le##bits##_to_cpu(p->member); \
789 kunmap_atomic(p, KM_USER0); \
792 static inline void btrfs_set_##name(struct extent_buffer *eb, \
795 type *p = kmap_atomic(eb->first_page, KM_USER0); \
796 p->member = cpu_to_le##bits(val); \
797 kunmap_atomic(p, KM_USER0); \
800 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
801 static inline u##bits btrfs_##name(type *s) \
803 return le##bits##_to_cpu(s->member); \
805 static inline void btrfs_set_##name(type *s, u##bits val) \
807 s->member = cpu_to_le##bits(val); \
810 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
811 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
812 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
813 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
814 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
815 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
816 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
817 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
818 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
819 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
821 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
822 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
824 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
826 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
828 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
830 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
832 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
833 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
835 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
837 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
840 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
842 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
845 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
846 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
847 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
848 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
849 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
850 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
851 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
852 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
853 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
854 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
855 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
857 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
859 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
862 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
863 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
864 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
866 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
868 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
870 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
872 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
873 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
875 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
877 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
878 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
880 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
883 unsigned long offset = (unsigned long)c;
884 offset += offsetof(struct btrfs_chunk, stripe);
885 offset += nr * sizeof(struct btrfs_stripe);
886 return (struct btrfs_stripe *)offset;
889 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
891 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
894 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
895 struct btrfs_chunk *c, int nr)
897 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
900 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
901 struct btrfs_chunk *c, int nr,
904 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
907 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
908 struct btrfs_chunk *c, int nr)
910 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
913 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
914 struct btrfs_chunk *c, int nr,
917 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
920 /* struct btrfs_block_group_item */
921 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
923 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
925 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
926 struct btrfs_block_group_item, chunk_objectid, 64);
928 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
929 struct btrfs_block_group_item, chunk_objectid, 64);
930 BTRFS_SETGET_FUNCS(disk_block_group_flags,
931 struct btrfs_block_group_item, flags, 64);
932 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
933 struct btrfs_block_group_item, flags, 64);
935 /* struct btrfs_inode_ref */
936 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
937 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
939 /* struct btrfs_inode_item */
940 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
941 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
942 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
943 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
944 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
945 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
946 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
947 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
948 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
949 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
950 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
953 static inline struct btrfs_timespec *
954 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
956 unsigned long ptr = (unsigned long)inode_item;
957 ptr += offsetof(struct btrfs_inode_item, atime);
958 return (struct btrfs_timespec *)ptr;
961 static inline struct btrfs_timespec *
962 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
964 unsigned long ptr = (unsigned long)inode_item;
965 ptr += offsetof(struct btrfs_inode_item, mtime);
966 return (struct btrfs_timespec *)ptr;
969 static inline struct btrfs_timespec *
970 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
972 unsigned long ptr = (unsigned long)inode_item;
973 ptr += offsetof(struct btrfs_inode_item, ctime);
974 return (struct btrfs_timespec *)ptr;
977 static inline struct btrfs_timespec *
978 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
980 unsigned long ptr = (unsigned long)inode_item;
981 ptr += offsetof(struct btrfs_inode_item, otime);
982 return (struct btrfs_timespec *)ptr;
985 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
986 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
988 /* struct btrfs_extent_item */
989 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
991 /* struct btrfs_dev_extent */
992 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
994 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
996 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
998 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1000 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1002 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1003 return (u8 *)((unsigned long)dev + ptr);
1006 /* struct btrfs_extent_ref */
1007 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1008 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1009 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1010 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
1012 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1013 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1015 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1017 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
1019 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1022 /* struct btrfs_node */
1023 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1024 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1026 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1029 ptr = offsetof(struct btrfs_node, ptrs) +
1030 sizeof(struct btrfs_key_ptr) * nr;
1031 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1034 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1038 ptr = offsetof(struct btrfs_node, ptrs) +
1039 sizeof(struct btrfs_key_ptr) * nr;
1040 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1043 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1046 ptr = offsetof(struct btrfs_node, ptrs) +
1047 sizeof(struct btrfs_key_ptr) * nr;
1048 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1051 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1055 ptr = offsetof(struct btrfs_node, ptrs) +
1056 sizeof(struct btrfs_key_ptr) * nr;
1057 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1060 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1062 return offsetof(struct btrfs_node, ptrs) +
1063 sizeof(struct btrfs_key_ptr) * nr;
1066 void btrfs_node_key(struct extent_buffer *eb,
1067 struct btrfs_disk_key *disk_key, int nr);
1069 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1070 struct btrfs_disk_key *disk_key, int nr)
1073 ptr = btrfs_node_key_ptr_offset(nr);
1074 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1075 struct btrfs_key_ptr, key, disk_key);
1078 /* struct btrfs_item */
1079 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1080 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1082 static inline unsigned long btrfs_item_nr_offset(int nr)
1084 return offsetof(struct btrfs_leaf, items) +
1085 sizeof(struct btrfs_item) * nr;
1088 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1091 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1094 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1095 struct btrfs_item *item)
1097 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1100 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1102 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1105 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1107 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1110 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1112 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1115 static inline void btrfs_item_key(struct extent_buffer *eb,
1116 struct btrfs_disk_key *disk_key, int nr)
1118 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1119 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1122 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1123 struct btrfs_disk_key *disk_key, int nr)
1125 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1126 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1129 /* struct btrfs_dir_item */
1130 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1131 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1132 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1134 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1135 struct btrfs_dir_item *item,
1136 struct btrfs_disk_key *key)
1138 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1141 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1142 struct btrfs_dir_item *item,
1143 struct btrfs_disk_key *key)
1145 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1148 /* struct btrfs_disk_key */
1149 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1151 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1152 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1154 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1155 struct btrfs_disk_key *disk)
1157 cpu->offset = le64_to_cpu(disk->offset);
1158 cpu->type = disk->type;
1159 cpu->objectid = le64_to_cpu(disk->objectid);
1162 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1163 struct btrfs_key *cpu)
1165 disk->offset = cpu_to_le64(cpu->offset);
1166 disk->type = cpu->type;
1167 disk->objectid = cpu_to_le64(cpu->objectid);
1170 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1171 struct btrfs_key *key, int nr)
1173 struct btrfs_disk_key disk_key;
1174 btrfs_node_key(eb, &disk_key, nr);
1175 btrfs_disk_key_to_cpu(key, &disk_key);
1178 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1179 struct btrfs_key *key, int nr)
1181 struct btrfs_disk_key disk_key;
1182 btrfs_item_key(eb, &disk_key, nr);
1183 btrfs_disk_key_to_cpu(key, &disk_key);
1186 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1187 struct btrfs_dir_item *item,
1188 struct btrfs_key *key)
1190 struct btrfs_disk_key disk_key;
1191 btrfs_dir_item_key(eb, item, &disk_key);
1192 btrfs_disk_key_to_cpu(key, &disk_key);
1196 static inline u8 btrfs_key_type(struct btrfs_key *key)
1201 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1206 /* struct btrfs_header */
1207 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1208 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1210 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1211 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1212 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1213 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1215 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1217 return (btrfs_header_flags(eb) & flag) == flag;
1220 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1222 u64 flags = btrfs_header_flags(eb);
1223 btrfs_set_header_flags(eb, flags | flag);
1224 return (flags & flag) == flag;
1227 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1229 u64 flags = btrfs_header_flags(eb);
1230 btrfs_set_header_flags(eb, flags & ~flag);
1231 return (flags & flag) == flag;
1234 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1236 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1240 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1242 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1246 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1248 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1252 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1254 unsigned long ptr = offsetof(struct btrfs_header, csum);
1258 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1263 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1268 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1273 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1275 return (btrfs_header_level(eb) == 0);
1278 /* struct btrfs_root_item */
1279 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1280 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1281 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1283 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1284 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1285 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1286 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1287 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1288 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1289 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1291 /* struct btrfs_super_block */
1292 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1293 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1294 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1296 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1297 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1298 struct btrfs_super_block, sys_chunk_array_size, 32);
1299 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1301 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1303 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1304 chunk_root_level, 64);
1305 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1307 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1309 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1311 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1313 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1315 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1317 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1318 root_dir_objectid, 64);
1319 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1322 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1324 return offsetof(struct btrfs_leaf, items);
1327 /* struct btrfs_file_extent_item */
1328 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1330 static inline unsigned long btrfs_file_extent_inline_start(struct
1331 btrfs_file_extent_item *e)
1333 unsigned long offset = (unsigned long)e;
1334 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1338 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1340 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1343 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1344 struct btrfs_item *e)
1346 unsigned long offset;
1347 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1348 return btrfs_item_size(eb, e) - offset;
1351 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1353 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1355 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1356 disk_num_bytes, 64);
1357 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1359 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1362 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1364 return sb->s_fs_info;
1367 static inline int btrfs_set_root_name(struct btrfs_root *root,
1368 const char *name, int len)
1370 /* if we already have a name just free it */
1374 root->name = kmalloc(len+1, GFP_KERNEL);
1378 memcpy(root->name, name, len);
1379 root->name[len] ='\0';
1384 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1386 return root->leafsize;
1387 return root->nodesize;
1390 /* helper function to cast into the data area of the leaf. */
1391 #define btrfs_item_ptr(leaf, slot, type) \
1392 ((type *)(btrfs_leaf_data(leaf) + \
1393 btrfs_item_offset_nr(leaf, slot)))
1395 #define btrfs_item_ptr_offset(leaf, slot) \
1396 ((unsigned long)(btrfs_leaf_data(leaf) + \
1397 btrfs_item_offset_nr(leaf, slot)))
1399 static inline struct dentry *fdentry(struct file *file) {
1400 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1401 return file->f_dentry;
1403 return file->f_path.dentry;
1408 int btrfs_cross_ref_exists(struct btrfs_trans_handle *trans,
1409 struct btrfs_root *root,
1410 struct btrfs_key *key, u64 bytenr);
1411 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1412 struct btrfs_root *root);
1413 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1414 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1415 btrfs_fs_info *info,
1417 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1418 struct btrfs_block_group_cache
1419 *hint, u64 search_start,
1420 int data, int owner);
1421 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1422 struct btrfs_root *root,
1430 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1431 struct btrfs_root *root,
1432 u64 bytenr, u32 blocksize);
1433 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1434 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1435 struct btrfs_root *root,
1436 struct btrfs_path *path, u64 bytenr,
1437 u64 root_objectid, u64 ref_generation,
1438 u64 owner, u64 owner_offset);
1439 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1440 struct btrfs_root *root,
1441 u64 num_bytes, u64 min_bytes,
1442 u64 root_objectid, u64 ref_generation,
1443 u64 owner, u64 owner_offset,
1444 u64 empty_size, u64 hint_byte,
1445 u64 search_end, struct btrfs_key *ins, u64 data);
1446 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1447 struct btrfs_root *root,
1448 u64 root_objectid, u64 ref_generation,
1449 u64 owner, u64 owner_offset,
1450 struct btrfs_key *ins);
1451 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1452 struct btrfs_root *root,
1453 u64 num_bytes, u64 min_alloc_size,
1454 u64 empty_size, u64 hint_byte,
1455 u64 search_end, struct btrfs_key *ins,
1457 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1458 struct extent_buffer *buf, int cache_ref);
1459 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1460 *root, u64 bytenr, u64 num_bytes,
1461 u64 root_objectid, u64 ref_generation,
1462 u64 owner_objectid, u64 owner_offset, int pin);
1463 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
1464 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1465 struct btrfs_root *root,
1466 struct extent_io_tree *unpin);
1467 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1468 struct btrfs_root *root,
1469 u64 bytenr, u64 num_bytes,
1470 u64 root_objectid, u64 ref_generation,
1471 u64 owner, u64 owner_offset);
1472 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1473 struct btrfs_root *root);
1474 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1475 int btrfs_read_block_groups(struct btrfs_root *root);
1476 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1477 struct btrfs_root *root, u64 bytes_used,
1478 u64 type, u64 chunk_objectid, u64 chunk_offset,
1481 int btrfs_previous_item(struct btrfs_root *root,
1482 struct btrfs_path *path, u64 min_objectid,
1485 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1486 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1487 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1488 struct btrfs_key *key, int lowest_level,
1489 int cache_only, u64 min_trans);
1490 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1491 struct btrfs_path *path, int cache_only,
1494 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1495 struct btrfs_root *root, struct extent_buffer *buf,
1496 struct extent_buffer *parent, int parent_slot,
1497 struct extent_buffer **cow_ret, u64 prealloc_dest);
1498 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1499 struct btrfs_root *root,
1500 struct extent_buffer *buf,
1501 struct extent_buffer **cow_ret, u64 new_root_objectid);
1502 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1503 *root, struct btrfs_path *path, u32 data_size);
1504 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1505 struct btrfs_root *root,
1506 struct btrfs_path *path,
1507 u32 new_size, int from_end);
1508 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1509 *root, struct btrfs_key *key, struct btrfs_path *p, int
1511 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1512 struct btrfs_root *root, struct extent_buffer *parent,
1513 int start_slot, int cache_only, u64 *last_ret,
1514 struct btrfs_key *progress);
1515 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1516 struct btrfs_path *btrfs_alloc_path(void);
1517 void btrfs_free_path(struct btrfs_path *p);
1518 void btrfs_init_path(struct btrfs_path *p);
1519 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1520 struct btrfs_path *path, int slot, int nr);
1522 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1523 struct btrfs_root *root,
1524 struct btrfs_path *path)
1526 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1529 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1530 *root, struct btrfs_key *key, void *data, u32 data_size);
1531 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1532 struct btrfs_root *root,
1533 struct btrfs_path *path,
1534 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1536 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1537 struct btrfs_root *root,
1538 struct btrfs_path *path,
1539 struct btrfs_key *key,
1542 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1545 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1546 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1547 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1548 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1551 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1552 struct btrfs_key *key);
1553 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1554 *root, struct btrfs_key *key, struct btrfs_root_item
1556 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1557 *root, struct btrfs_key *key, struct btrfs_root_item
1559 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1560 btrfs_root_item *item, struct btrfs_key *key);
1561 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1562 u64 *found_objectid);
1563 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1564 struct btrfs_root *latest_root);
1566 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1567 *root, const char *name, int name_len, u64 dir,
1568 struct btrfs_key *location, u8 type, u64 index);
1569 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1570 struct btrfs_root *root,
1571 struct btrfs_path *path, u64 dir,
1572 const char *name, int name_len,
1574 struct btrfs_dir_item *
1575 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1576 struct btrfs_root *root,
1577 struct btrfs_path *path, u64 dir,
1578 u64 objectid, const char *name, int name_len,
1580 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1581 struct btrfs_path *path,
1582 const char *name, int name_len);
1583 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1584 struct btrfs_root *root,
1585 struct btrfs_path *path,
1586 struct btrfs_dir_item *di);
1587 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1588 struct btrfs_root *root, const char *name,
1589 u16 name_len, const void *data, u16 data_len,
1591 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1592 struct btrfs_root *root,
1593 struct btrfs_path *path, u64 dir,
1594 const char *name, u16 name_len,
1598 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
1599 struct btrfs_root *root, u64 offset);
1600 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
1601 struct btrfs_root *root, u64 offset);
1604 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1605 struct btrfs_root *fs_root,
1606 u64 dirid, u64 *objectid);
1607 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1610 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1611 struct btrfs_root *root,
1612 const char *name, int name_len,
1613 u64 inode_objectid, u64 ref_objectid, u64 index);
1614 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1615 struct btrfs_root *root,
1616 const char *name, int name_len,
1617 u64 inode_objectid, u64 ref_objectid, u64 *index);
1618 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1619 struct btrfs_root *root,
1620 struct btrfs_path *path, u64 objectid);
1621 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1622 *root, struct btrfs_path *path,
1623 struct btrfs_key *location, int mod);
1626 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
1628 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1629 struct btrfs_root *root,
1630 u64 objectid, u64 pos, u64 disk_offset,
1632 u64 num_bytes, u64 offset);
1633 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1634 struct btrfs_root *root,
1635 struct btrfs_path *path, u64 objectid,
1636 u64 bytenr, int mod);
1637 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1638 struct btrfs_root *root, struct inode *inode,
1639 struct btrfs_ordered_sum *sums);
1640 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
1642 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1643 struct btrfs_root *root,
1644 struct btrfs_path *path,
1645 u64 objectid, u64 offset,
1647 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1648 struct btrfs_root *root, struct btrfs_path *path,
1652 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1653 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
1654 #define ClearPageChecked ClearPageFsMisc
1655 #define SetPageChecked SetPageFsMisc
1656 #define PageChecked PageFsMisc
1659 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
1660 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
1661 int btrfs_writepages(struct address_space *mapping,
1662 struct writeback_control *wbc);
1663 int btrfs_create_subvol_root(struct btrfs_root *new_root,
1664 struct btrfs_trans_handle *trans, u64 new_dirid,
1665 struct btrfs_block_group_cache *block_group);
1667 void btrfs_invalidate_dcache_root(struct btrfs_root *root, char *name,
1670 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1671 size_t size, struct bio *bio);
1673 static inline void dec_i_blocks(struct inode *inode, u64 dec)
1676 if (dec <= inode->i_blocks)
1677 inode->i_blocks -= dec;
1679 inode->i_blocks = 0;
1682 unsigned long btrfs_force_ra(struct address_space *mapping,
1683 struct file_ra_state *ra, struct file *file,
1684 pgoff_t offset, pgoff_t last_index);
1685 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1687 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1688 int btrfs_readpage(struct file *file, struct page *page);
1689 void btrfs_delete_inode(struct inode *inode);
1690 void btrfs_put_inode(struct inode *inode);
1691 void btrfs_read_locked_inode(struct inode *inode);
1692 int btrfs_write_inode(struct inode *inode, int wait);
1693 void btrfs_dirty_inode(struct inode *inode);
1694 struct inode *btrfs_alloc_inode(struct super_block *sb);
1695 void btrfs_destroy_inode(struct inode *inode);
1696 int btrfs_init_cachep(void);
1697 void btrfs_destroy_cachep(void);
1698 long btrfs_ioctl_trans_end(struct file *file);
1699 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1700 struct btrfs_root *root);
1701 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1703 int btrfs_commit_write(struct file *file, struct page *page,
1704 unsigned from, unsigned to);
1705 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1706 size_t page_offset, u64 start, u64 end,
1708 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1709 struct btrfs_root *root,
1710 struct inode *inode);
1713 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1716 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
1717 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1718 extern struct file_operations btrfs_file_operations;
1719 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1720 struct btrfs_root *root, struct inode *inode,
1721 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1722 int btrfs_release_file(struct inode *inode, struct file *file);
1725 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1726 struct btrfs_root *root, int cache_only);
1729 int btrfs_init_sysfs(void);
1730 void btrfs_exit_sysfs(void);
1731 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1732 int btrfs_sysfs_add_root(struct btrfs_root *root);
1733 void btrfs_sysfs_del_root(struct btrfs_root *root);
1734 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1737 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1740 u64 btrfs_parse_size(char *str);
1741 int btrfs_parse_options(struct btrfs_root *root, char *options);
1742 int btrfs_sync_fs(struct super_block *sb, int wait);
1745 int btrfs_check_acl(struct inode *inode, int mask);
1746 int btrfs_init_acl(struct inode *inode, struct inode *dir);
1747 int btrfs_acl_chmod(struct inode *inode);