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 unsigned long mount_opt;
525 struct btrfs_transaction *running_transaction;
526 wait_queue_head_t transaction_throttle;
527 wait_queue_head_t transaction_wait;
528 struct btrfs_super_block super_copy;
529 struct btrfs_super_block super_for_commit;
530 struct block_device *__bdev;
531 struct super_block *sb;
532 struct inode *btree_inode;
533 struct backing_dev_info bdi;
534 spinlock_t hash_lock;
535 struct mutex trans_mutex;
536 struct mutex transaction_kthread_mutex;
537 struct mutex cleaner_mutex;
538 struct mutex alloc_mutex;
539 struct mutex chunk_mutex;
540 struct mutex drop_mutex;
541 struct mutex volume_mutex;
542 struct list_head trans_list;
543 struct list_head hashers;
544 struct list_head dead_roots;
545 atomic_t nr_async_submits;
548 * this is used by the balancing code to wait for all the pending
551 spinlock_t ordered_extent_lock;
552 struct list_head ordered_extents;
555 * there is a pool of worker threads for checksumming during writes
556 * and a pool for checksumming after reads. This is because readers
557 * can run with FS locks held, and the writers may be waiting for
558 * those locks. We don't want ordering in the pending list to cause
559 * deadlocks, and so the two are serviced separately.
561 * A third pool does submit_bio to avoid deadlocking with the other
564 struct btrfs_workers workers;
565 struct btrfs_workers endio_workers;
566 struct btrfs_workers endio_write_workers;
567 struct btrfs_workers submit_workers;
569 * fixup workers take dirty pages that didn't properly go through
570 * the cow mechanism and make them safe to write. It happens
571 * for the sys_munmap function call path
573 struct btrfs_workers fixup_workers;
574 struct task_struct *transaction_kthread;
575 struct task_struct *cleaner_kthread;
576 int thread_pool_size;
578 struct kobject super_kobj;
579 struct completion kobj_unregister;
585 struct list_head dirty_cowonly_roots;
587 struct btrfs_fs_devices *fs_devices;
588 struct list_head space_info;
589 spinlock_t delalloc_lock;
590 spinlock_t new_trans_lock;
595 spinlock_t ref_cache_lock;
596 u64 total_ref_cache_size;
597 u64 running_ref_cache_size;
599 u64 avail_data_alloc_bits;
600 u64 avail_metadata_alloc_bits;
601 u64 avail_system_alloc_bits;
602 u64 data_alloc_profile;
603 u64 metadata_alloc_profile;
604 u64 system_alloc_profile;
610 * in ram representation of the tree. extent_root is used for all allocations
611 * and for the extent tree extent_root root.
614 struct extent_buffer *node;
616 /* the node lock is held while changing the node pointer */
617 spinlock_t node_lock;
619 struct extent_buffer *commit_root;
620 struct btrfs_leaf_ref_tree *ref_tree;
622 struct btrfs_root_item root_item;
623 struct btrfs_key root_key;
624 struct btrfs_fs_info *fs_info;
626 struct kobject root_kobj;
627 struct completion kobj_unregister;
628 struct mutex objectid_mutex;
632 /* data allocations are done in sectorsize units */
635 /* node allocations are done in nodesize units */
638 /* leaf allocations are done in leafsize units */
645 u64 last_inode_alloc;
648 u64 defrag_trans_start;
649 struct btrfs_key defrag_progress;
650 struct btrfs_key defrag_max;
656 /* the dirty list is only used by non-reference counted roots */
657 struct list_head dirty_list;
659 spinlock_t orphan_lock;
660 struct list_head orphan_list;
665 * inode items have the data typically returned from stat and store other
666 * info about object characteristics. There is one for every file and dir in
669 #define BTRFS_INODE_ITEM_KEY 1
670 #define BTRFS_INODE_REF_KEY 2
671 #define BTRFS_XATTR_ITEM_KEY 8
672 #define BTRFS_ORPHAN_ITEM_KEY 9
673 /* reserve 2-15 close to the inode for later flexibility */
676 * dir items are the name -> inode pointers in a directory. There is one
677 * for every name in a directory.
679 #define BTRFS_DIR_ITEM_KEY 16
680 #define BTRFS_DIR_INDEX_KEY 17
682 * extent data is for file data
684 #define BTRFS_EXTENT_DATA_KEY 18
686 * csum items have the checksums for data in the extents
688 #define BTRFS_CSUM_ITEM_KEY 19
690 /* reserve 20-31 for other file stuff */
693 * root items point to tree roots. There are typically in the root
694 * tree used by the super block to find all the other trees
696 #define BTRFS_ROOT_ITEM_KEY 32
698 * extent items are in the extent map tree. These record which blocks
699 * are used, and how many references there are to each block
701 #define BTRFS_EXTENT_ITEM_KEY 33
702 #define BTRFS_EXTENT_REF_KEY 34
705 * block groups give us hints into the extent allocation trees. Which
706 * blocks are free etc etc
708 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
710 #define BTRFS_DEV_EXTENT_KEY 75
711 #define BTRFS_DEV_ITEM_KEY 76
712 #define BTRFS_CHUNK_ITEM_KEY 77
715 * string items are for debugging. They just store a short string of
718 #define BTRFS_STRING_ITEM_KEY 253
720 #define BTRFS_MOUNT_NODATASUM (1 << 0)
721 #define BTRFS_MOUNT_NODATACOW (1 << 1)
722 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
723 #define BTRFS_MOUNT_SSD (1 << 3)
724 #define BTRFS_MOUNT_DEGRADED (1 << 4)
726 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
727 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
728 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
733 #define BTRFS_INODE_NODATASUM (1 << 0)
734 #define BTRFS_INODE_NODATACOW (1 << 1)
735 #define BTRFS_INODE_READONLY (1 << 2)
736 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
738 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
740 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
742 /* some macros to generate set/get funcs for the struct fields. This
743 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
746 #define le8_to_cpu(v) (v)
747 #define cpu_to_le8(v) (v)
750 #define read_eb_member(eb, ptr, type, member, result) ( \
751 read_extent_buffer(eb, (char *)(result), \
752 ((unsigned long)(ptr)) + \
753 offsetof(type, member), \
754 sizeof(((type *)0)->member)))
756 #define write_eb_member(eb, ptr, type, member, result) ( \
757 write_extent_buffer(eb, (char *)(result), \
758 ((unsigned long)(ptr)) + \
759 offsetof(type, member), \
760 sizeof(((type *)0)->member)))
762 #ifndef BTRFS_SETGET_FUNCS
763 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
764 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
765 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
768 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
769 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
771 type *p = kmap_atomic(eb->first_page, KM_USER0); \
772 u##bits res = le##bits##_to_cpu(p->member); \
773 kunmap_atomic(p, KM_USER0); \
776 static inline void btrfs_set_##name(struct extent_buffer *eb, \
779 type *p = kmap_atomic(eb->first_page, KM_USER0); \
780 p->member = cpu_to_le##bits(val); \
781 kunmap_atomic(p, KM_USER0); \
784 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
785 static inline u##bits btrfs_##name(type *s) \
787 return le##bits##_to_cpu(s->member); \
789 static inline void btrfs_set_##name(type *s, u##bits val) \
791 s->member = cpu_to_le##bits(val); \
794 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
795 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
796 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
797 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
798 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
799 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
800 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
801 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
802 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
803 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
805 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
806 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
808 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
810 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
812 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
814 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
816 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
817 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
819 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
821 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
824 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
826 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
829 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
830 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
831 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
832 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
833 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
834 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
835 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
836 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
837 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
838 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
839 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
841 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
843 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
846 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
847 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
848 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
850 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
852 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
854 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
856 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
857 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
859 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
861 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
862 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
864 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
867 unsigned long offset = (unsigned long)c;
868 offset += offsetof(struct btrfs_chunk, stripe);
869 offset += nr * sizeof(struct btrfs_stripe);
870 return (struct btrfs_stripe *)offset;
873 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
875 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
878 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
879 struct btrfs_chunk *c, int nr)
881 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
884 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
885 struct btrfs_chunk *c, int nr,
888 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
891 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
892 struct btrfs_chunk *c, int nr)
894 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
897 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
898 struct btrfs_chunk *c, int nr,
901 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
904 /* struct btrfs_block_group_item */
905 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
907 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
909 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
910 struct btrfs_block_group_item, chunk_objectid, 64);
912 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
913 struct btrfs_block_group_item, chunk_objectid, 64);
914 BTRFS_SETGET_FUNCS(disk_block_group_flags,
915 struct btrfs_block_group_item, flags, 64);
916 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
917 struct btrfs_block_group_item, flags, 64);
919 /* struct btrfs_inode_ref */
920 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
921 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
923 /* struct btrfs_inode_item */
924 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
925 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
926 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
927 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
928 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
929 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
930 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
931 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
932 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
933 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
934 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
937 static inline struct btrfs_timespec *
938 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
940 unsigned long ptr = (unsigned long)inode_item;
941 ptr += offsetof(struct btrfs_inode_item, atime);
942 return (struct btrfs_timespec *)ptr;
945 static inline struct btrfs_timespec *
946 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
948 unsigned long ptr = (unsigned long)inode_item;
949 ptr += offsetof(struct btrfs_inode_item, mtime);
950 return (struct btrfs_timespec *)ptr;
953 static inline struct btrfs_timespec *
954 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
956 unsigned long ptr = (unsigned long)inode_item;
957 ptr += offsetof(struct btrfs_inode_item, ctime);
958 return (struct btrfs_timespec *)ptr;
961 static inline struct btrfs_timespec *
962 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
964 unsigned long ptr = (unsigned long)inode_item;
965 ptr += offsetof(struct btrfs_inode_item, otime);
966 return (struct btrfs_timespec *)ptr;
969 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
970 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
972 /* struct btrfs_extent_item */
973 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
975 /* struct btrfs_dev_extent */
976 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
978 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
980 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
982 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
984 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
986 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
987 return (u8 *)((unsigned long)dev + ptr);
990 /* struct btrfs_extent_ref */
991 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
992 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
993 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
994 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
996 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
997 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
999 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1001 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
1003 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1006 /* struct btrfs_node */
1007 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1008 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1010 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1013 ptr = offsetof(struct btrfs_node, ptrs) +
1014 sizeof(struct btrfs_key_ptr) * nr;
1015 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1018 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1022 ptr = offsetof(struct btrfs_node, ptrs) +
1023 sizeof(struct btrfs_key_ptr) * nr;
1024 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1027 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1030 ptr = offsetof(struct btrfs_node, ptrs) +
1031 sizeof(struct btrfs_key_ptr) * nr;
1032 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1035 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1039 ptr = offsetof(struct btrfs_node, ptrs) +
1040 sizeof(struct btrfs_key_ptr) * nr;
1041 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1044 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1046 return offsetof(struct btrfs_node, ptrs) +
1047 sizeof(struct btrfs_key_ptr) * nr;
1050 void btrfs_node_key(struct extent_buffer *eb,
1051 struct btrfs_disk_key *disk_key, int nr);
1053 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1054 struct btrfs_disk_key *disk_key, int nr)
1057 ptr = btrfs_node_key_ptr_offset(nr);
1058 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1059 struct btrfs_key_ptr, key, disk_key);
1062 /* struct btrfs_item */
1063 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1064 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1066 static inline unsigned long btrfs_item_nr_offset(int nr)
1068 return offsetof(struct btrfs_leaf, items) +
1069 sizeof(struct btrfs_item) * nr;
1072 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1075 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1078 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1079 struct btrfs_item *item)
1081 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1084 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1086 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1089 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1091 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1094 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1096 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1099 static inline void btrfs_item_key(struct extent_buffer *eb,
1100 struct btrfs_disk_key *disk_key, int nr)
1102 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1103 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1106 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1107 struct btrfs_disk_key *disk_key, int nr)
1109 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1110 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1113 /* struct btrfs_dir_item */
1114 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1115 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1116 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1118 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1119 struct btrfs_dir_item *item,
1120 struct btrfs_disk_key *key)
1122 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1125 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1126 struct btrfs_dir_item *item,
1127 struct btrfs_disk_key *key)
1129 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1132 /* struct btrfs_disk_key */
1133 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1135 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1136 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1138 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1139 struct btrfs_disk_key *disk)
1141 cpu->offset = le64_to_cpu(disk->offset);
1142 cpu->type = disk->type;
1143 cpu->objectid = le64_to_cpu(disk->objectid);
1146 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1147 struct btrfs_key *cpu)
1149 disk->offset = cpu_to_le64(cpu->offset);
1150 disk->type = cpu->type;
1151 disk->objectid = cpu_to_le64(cpu->objectid);
1154 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1155 struct btrfs_key *key, int nr)
1157 struct btrfs_disk_key disk_key;
1158 btrfs_node_key(eb, &disk_key, nr);
1159 btrfs_disk_key_to_cpu(key, &disk_key);
1162 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1163 struct btrfs_key *key, int nr)
1165 struct btrfs_disk_key disk_key;
1166 btrfs_item_key(eb, &disk_key, nr);
1167 btrfs_disk_key_to_cpu(key, &disk_key);
1170 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1171 struct btrfs_dir_item *item,
1172 struct btrfs_key *key)
1174 struct btrfs_disk_key disk_key;
1175 btrfs_dir_item_key(eb, item, &disk_key);
1176 btrfs_disk_key_to_cpu(key, &disk_key);
1180 static inline u8 btrfs_key_type(struct btrfs_key *key)
1185 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1190 /* struct btrfs_header */
1191 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1192 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1194 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1195 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1196 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1197 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1199 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1201 return (btrfs_header_flags(eb) & flag) == flag;
1204 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1206 u64 flags = btrfs_header_flags(eb);
1207 btrfs_set_header_flags(eb, flags | flag);
1208 return (flags & flag) == flag;
1211 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1213 u64 flags = btrfs_header_flags(eb);
1214 btrfs_set_header_flags(eb, flags & ~flag);
1215 return (flags & flag) == flag;
1218 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1220 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1224 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1226 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1230 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1232 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1236 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1238 unsigned long ptr = offsetof(struct btrfs_header, csum);
1242 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1247 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1252 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1257 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1259 return (btrfs_header_level(eb) == 0);
1262 /* struct btrfs_root_item */
1263 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1264 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1265 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1267 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1268 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1269 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1270 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1271 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1272 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1273 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1275 /* struct btrfs_super_block */
1276 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1277 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1278 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1280 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1281 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1282 struct btrfs_super_block, sys_chunk_array_size, 32);
1283 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1285 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1287 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1288 chunk_root_level, 64);
1289 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1291 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1293 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1295 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1297 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1299 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1301 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1302 root_dir_objectid, 64);
1303 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1306 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1308 return offsetof(struct btrfs_leaf, items);
1311 /* struct btrfs_file_extent_item */
1312 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1314 static inline unsigned long btrfs_file_extent_inline_start(struct
1315 btrfs_file_extent_item *e)
1317 unsigned long offset = (unsigned long)e;
1318 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1322 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1324 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1327 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1328 struct btrfs_item *e)
1330 unsigned long offset;
1331 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1332 return btrfs_item_size(eb, e) - offset;
1335 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1337 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1339 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1340 disk_num_bytes, 64);
1341 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1343 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1346 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1348 return sb->s_fs_info;
1351 static inline int btrfs_set_root_name(struct btrfs_root *root,
1352 const char *name, int len)
1354 /* if we already have a name just free it */
1358 root->name = kmalloc(len+1, GFP_KERNEL);
1362 memcpy(root->name, name, len);
1363 root->name[len] ='\0';
1368 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1370 return root->leafsize;
1371 return root->nodesize;
1374 /* helper function to cast into the data area of the leaf. */
1375 #define btrfs_item_ptr(leaf, slot, type) \
1376 ((type *)(btrfs_leaf_data(leaf) + \
1377 btrfs_item_offset_nr(leaf, slot)))
1379 #define btrfs_item_ptr_offset(leaf, slot) \
1380 ((unsigned long)(btrfs_leaf_data(leaf) + \
1381 btrfs_item_offset_nr(leaf, slot)))
1383 static inline struct dentry *fdentry(struct file *file) {
1384 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1385 return file->f_dentry;
1387 return file->f_path.dentry;
1392 u32 btrfs_count_snapshots_in_path(struct btrfs_root *root,
1393 struct btrfs_path *count_path,
1394 u64 expected_owner, u64 first_extent);
1395 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1396 struct btrfs_root *root);
1397 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1398 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1399 btrfs_fs_info *info,
1401 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1402 struct btrfs_block_group_cache
1403 *hint, u64 search_start,
1404 int data, int owner);
1405 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1406 struct btrfs_root *root,
1414 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1415 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1416 struct btrfs_root *root,
1417 struct btrfs_path *path, u64 bytenr,
1418 u64 root_objectid, u64 ref_generation,
1419 u64 owner, u64 owner_offset);
1420 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1421 struct btrfs_root *root,
1422 u64 num_bytes, u64 min_bytes,
1423 u64 root_objectid, u64 ref_generation,
1424 u64 owner, u64 owner_offset,
1425 u64 empty_size, u64 hint_byte,
1426 u64 search_end, struct btrfs_key *ins, u64 data);
1427 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1428 struct btrfs_root *root,
1429 u64 root_objectid, u64 ref_generation,
1430 u64 owner, u64 owner_offset,
1431 struct btrfs_key *ins);
1432 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1433 struct btrfs_root *root,
1434 u64 num_bytes, u64 min_alloc_size,
1435 u64 empty_size, u64 hint_byte,
1436 u64 search_end, struct btrfs_key *ins,
1438 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1439 struct extent_buffer *buf, int cache_ref);
1440 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1441 *root, u64 bytenr, u64 num_bytes,
1442 u64 root_objectid, u64 ref_generation,
1443 u64 owner_objectid, u64 owner_offset, int pin);
1444 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1445 struct btrfs_root *root,
1446 struct extent_io_tree *unpin);
1447 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1448 struct btrfs_root *root,
1449 u64 bytenr, u64 num_bytes,
1450 u64 root_objectid, u64 ref_generation,
1451 u64 owner, u64 owner_offset);
1452 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1453 struct btrfs_root *root);
1454 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1455 int btrfs_read_block_groups(struct btrfs_root *root);
1456 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1457 struct btrfs_root *root, u64 bytes_used,
1458 u64 type, u64 chunk_objectid, u64 chunk_offset,
1461 int btrfs_previous_item(struct btrfs_root *root,
1462 struct btrfs_path *path, u64 min_objectid,
1465 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1466 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1467 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1468 struct btrfs_key *key, int lowest_level,
1469 int cache_only, u64 min_trans);
1470 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1471 struct btrfs_path *path, int cache_only,
1474 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1475 struct btrfs_root *root, struct extent_buffer *buf,
1476 struct extent_buffer *parent, int parent_slot,
1477 struct extent_buffer **cow_ret);
1478 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1479 struct btrfs_root *root,
1480 struct extent_buffer *buf,
1481 struct extent_buffer **cow_ret, u64 new_root_objectid);
1482 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1483 *root, struct btrfs_path *path, u32 data_size);
1484 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1485 struct btrfs_root *root,
1486 struct btrfs_path *path,
1487 u32 new_size, int from_end);
1488 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1489 *root, struct btrfs_key *key, struct btrfs_path *p, int
1491 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1492 struct btrfs_root *root, struct extent_buffer *parent,
1493 int start_slot, int cache_only, u64 *last_ret,
1494 struct btrfs_key *progress);
1495 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1496 struct btrfs_path *btrfs_alloc_path(void);
1497 void btrfs_free_path(struct btrfs_path *p);
1498 void btrfs_init_path(struct btrfs_path *p);
1499 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1500 struct btrfs_path *path, int slot, int nr);
1502 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1503 struct btrfs_root *root,
1504 struct btrfs_path *path)
1506 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1509 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1510 *root, struct btrfs_key *key, void *data, u32 data_size);
1511 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1512 struct btrfs_root *root,
1513 struct btrfs_path *path,
1514 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1516 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1517 struct btrfs_root *root,
1518 struct btrfs_path *path,
1519 struct btrfs_key *key,
1522 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1525 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1526 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1527 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1528 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1531 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1532 struct btrfs_key *key);
1533 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1534 *root, struct btrfs_key *key, struct btrfs_root_item
1536 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1537 *root, struct btrfs_key *key, struct btrfs_root_item
1539 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1540 btrfs_root_item *item, struct btrfs_key *key);
1541 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1542 u64 *found_objectid);
1543 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1544 struct btrfs_root *latest_root);
1546 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1547 *root, const char *name, int name_len, u64 dir,
1548 struct btrfs_key *location, u8 type, u64 index);
1549 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1550 struct btrfs_root *root,
1551 struct btrfs_path *path, u64 dir,
1552 const char *name, int name_len,
1554 struct btrfs_dir_item *
1555 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1556 struct btrfs_root *root,
1557 struct btrfs_path *path, u64 dir,
1558 u64 objectid, const char *name, int name_len,
1560 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1561 struct btrfs_path *path,
1562 const char *name, int name_len);
1563 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1564 struct btrfs_root *root,
1565 struct btrfs_path *path,
1566 struct btrfs_dir_item *di);
1567 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1568 struct btrfs_root *root, const char *name,
1569 u16 name_len, const void *data, u16 data_len,
1571 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1572 struct btrfs_root *root,
1573 struct btrfs_path *path, u64 dir,
1574 const char *name, u16 name_len,
1578 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
1579 struct btrfs_root *root, u64 offset);
1580 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
1581 struct btrfs_root *root, u64 offset);
1584 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1585 struct btrfs_root *fs_root,
1586 u64 dirid, u64 *objectid);
1587 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1590 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1591 struct btrfs_root *root,
1592 const char *name, int name_len,
1593 u64 inode_objectid, u64 ref_objectid, u64 index);
1594 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1595 struct btrfs_root *root,
1596 const char *name, int name_len,
1597 u64 inode_objectid, u64 ref_objectid, u64 *index);
1598 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1599 struct btrfs_root *root,
1600 struct btrfs_path *path, u64 objectid);
1601 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1602 *root, struct btrfs_path *path,
1603 struct btrfs_key *location, int mod);
1606 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1607 struct btrfs_root *root,
1608 u64 objectid, u64 pos, u64 disk_offset,
1610 u64 num_bytes, u64 offset);
1611 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1612 struct btrfs_root *root,
1613 struct btrfs_path *path, u64 objectid,
1614 u64 bytenr, int mod);
1615 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1616 struct btrfs_root *root, struct inode *inode,
1617 struct btrfs_ordered_sum *sums);
1618 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
1620 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1621 struct btrfs_root *root,
1622 struct btrfs_path *path,
1623 u64 objectid, u64 offset,
1625 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1626 struct btrfs_root *root, struct btrfs_path *path,
1630 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1631 #ifdef ClearPageFsMisc
1632 #define ClearPageChecked ClearPageFsMisc
1633 #define SetPageChecked SetPageFsMisc
1634 #define PageChecked PageFsMisc
1637 int btrfs_writepages(struct address_space *mapping,
1638 struct writeback_control *wbc);
1639 int btrfs_create_subvol_root(struct btrfs_root *new_root,
1640 struct btrfs_trans_handle *trans, u64 new_dirid,
1641 struct btrfs_block_group_cache *block_group);
1643 void btrfs_invalidate_dcache_root(struct btrfs_root *root, char *name,
1646 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1647 size_t size, struct bio *bio);
1649 static inline void dec_i_blocks(struct inode *inode, u64 dec)
1652 if (dec <= inode->i_blocks)
1653 inode->i_blocks -= dec;
1655 inode->i_blocks = 0;
1658 unsigned long btrfs_force_ra(struct address_space *mapping,
1659 struct file_ra_state *ra, struct file *file,
1660 pgoff_t offset, pgoff_t last_index);
1661 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1663 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1664 int btrfs_readpage(struct file *file, struct page *page);
1665 void btrfs_delete_inode(struct inode *inode);
1666 void btrfs_put_inode(struct inode *inode);
1667 void btrfs_read_locked_inode(struct inode *inode);
1668 int btrfs_write_inode(struct inode *inode, int wait);
1669 void btrfs_dirty_inode(struct inode *inode);
1670 struct inode *btrfs_alloc_inode(struct super_block *sb);
1671 void btrfs_destroy_inode(struct inode *inode);
1672 int btrfs_init_cachep(void);
1673 void btrfs_destroy_cachep(void);
1674 long btrfs_ioctl_trans_end(struct file *file);
1675 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1676 struct btrfs_root *root);
1677 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1679 int btrfs_commit_write(struct file *file, struct page *page,
1680 unsigned from, unsigned to);
1681 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1682 size_t page_offset, u64 start, u64 end,
1684 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1685 struct btrfs_root *root,
1686 struct inode *inode);
1689 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1692 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
1693 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1694 extern struct file_operations btrfs_file_operations;
1695 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1696 struct btrfs_root *root, struct inode *inode,
1697 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1698 int btrfs_release_file(struct inode *inode, struct file *file);
1701 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1702 struct btrfs_root *root, int cache_only);
1705 int btrfs_init_sysfs(void);
1706 void btrfs_exit_sysfs(void);
1707 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1708 int btrfs_sysfs_add_root(struct btrfs_root *root);
1709 void btrfs_sysfs_del_root(struct btrfs_root *root);
1710 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1713 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1716 u64 btrfs_parse_size(char *str);
1717 int btrfs_parse_options(struct btrfs_root *root, char *options);
1718 int btrfs_sync_fs(struct super_block *sb, int wait);
1721 int btrfs_check_acl(struct inode *inode, int mask);
1722 int btrfs_init_acl(struct inode *inode, struct inode *dir);
1723 int btrfs_acl_chmod(struct inode *inode);