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;
598 u64 avail_data_alloc_bits;
599 u64 avail_metadata_alloc_bits;
600 u64 avail_system_alloc_bits;
601 u64 data_alloc_profile;
602 u64 metadata_alloc_profile;
603 u64 system_alloc_profile;
608 struct btrfs_leaf_ref_tree {
610 struct btrfs_leaf_ref *last;
611 struct list_head list;
616 * in ram representation of the tree. extent_root is used for all allocations
617 * and for the extent tree extent_root root.
621 struct extent_buffer *node;
623 /* the node lock is held while changing the node pointer */
624 spinlock_t node_lock;
626 struct extent_buffer *commit_root;
627 struct btrfs_leaf_ref_tree *ref_tree;
628 struct btrfs_leaf_ref_tree ref_tree_struct;
629 struct dirty_root *dirty_root;
631 struct btrfs_root_item root_item;
632 struct btrfs_key root_key;
633 struct btrfs_fs_info *fs_info;
635 struct kobject root_kobj;
636 struct completion kobj_unregister;
637 struct mutex objectid_mutex;
641 /* data allocations are done in sectorsize units */
644 /* node allocations are done in nodesize units */
647 /* leaf allocations are done in leafsize units */
654 u64 last_inode_alloc;
657 u64 defrag_trans_start;
658 struct btrfs_key defrag_progress;
659 struct btrfs_key defrag_max;
665 /* the dirty list is only used by non-reference counted roots */
666 struct list_head dirty_list;
668 spinlock_t orphan_lock;
669 struct list_head orphan_list;
674 * inode items have the data typically returned from stat and store other
675 * info about object characteristics. There is one for every file and dir in
678 #define BTRFS_INODE_ITEM_KEY 1
679 #define BTRFS_INODE_REF_KEY 2
680 #define BTRFS_XATTR_ITEM_KEY 8
681 #define BTRFS_ORPHAN_ITEM_KEY 9
682 /* reserve 2-15 close to the inode for later flexibility */
685 * dir items are the name -> inode pointers in a directory. There is one
686 * for every name in a directory.
688 #define BTRFS_DIR_ITEM_KEY 16
689 #define BTRFS_DIR_INDEX_KEY 17
691 * extent data is for file data
693 #define BTRFS_EXTENT_DATA_KEY 18
695 * csum items have the checksums for data in the extents
697 #define BTRFS_CSUM_ITEM_KEY 19
699 /* reserve 20-31 for other file stuff */
702 * root items point to tree roots. There are typically in the root
703 * tree used by the super block to find all the other trees
705 #define BTRFS_ROOT_ITEM_KEY 32
707 * extent items are in the extent map tree. These record which blocks
708 * are used, and how many references there are to each block
710 #define BTRFS_EXTENT_ITEM_KEY 33
711 #define BTRFS_EXTENT_REF_KEY 34
714 * block groups give us hints into the extent allocation trees. Which
715 * blocks are free etc etc
717 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
719 #define BTRFS_DEV_EXTENT_KEY 75
720 #define BTRFS_DEV_ITEM_KEY 76
721 #define BTRFS_CHUNK_ITEM_KEY 77
724 * string items are for debugging. They just store a short string of
727 #define BTRFS_STRING_ITEM_KEY 253
729 #define BTRFS_MOUNT_NODATASUM (1 << 0)
730 #define BTRFS_MOUNT_NODATACOW (1 << 1)
731 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
732 #define BTRFS_MOUNT_SSD (1 << 3)
733 #define BTRFS_MOUNT_DEGRADED (1 << 4)
735 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
736 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
737 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
742 #define BTRFS_INODE_NODATASUM (1 << 0)
743 #define BTRFS_INODE_NODATACOW (1 << 1)
744 #define BTRFS_INODE_READONLY (1 << 2)
745 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
747 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
749 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
751 /* some macros to generate set/get funcs for the struct fields. This
752 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
755 #define le8_to_cpu(v) (v)
756 #define cpu_to_le8(v) (v)
759 #define read_eb_member(eb, ptr, type, member, result) ( \
760 read_extent_buffer(eb, (char *)(result), \
761 ((unsigned long)(ptr)) + \
762 offsetof(type, member), \
763 sizeof(((type *)0)->member)))
765 #define write_eb_member(eb, ptr, type, member, result) ( \
766 write_extent_buffer(eb, (char *)(result), \
767 ((unsigned long)(ptr)) + \
768 offsetof(type, member), \
769 sizeof(((type *)0)->member)))
771 #ifndef BTRFS_SETGET_FUNCS
772 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
773 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
774 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
777 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
778 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
780 type *p = kmap_atomic(eb->first_page, KM_USER0); \
781 u##bits res = le##bits##_to_cpu(p->member); \
782 kunmap_atomic(p, KM_USER0); \
785 static inline void btrfs_set_##name(struct extent_buffer *eb, \
788 type *p = kmap_atomic(eb->first_page, KM_USER0); \
789 p->member = cpu_to_le##bits(val); \
790 kunmap_atomic(p, KM_USER0); \
793 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
794 static inline u##bits btrfs_##name(type *s) \
796 return le##bits##_to_cpu(s->member); \
798 static inline void btrfs_set_##name(type *s, u##bits val) \
800 s->member = cpu_to_le##bits(val); \
803 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
804 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
805 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
806 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
807 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
808 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
809 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
810 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
811 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
812 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
814 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
815 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
817 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
819 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
821 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
823 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
825 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
826 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
828 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
830 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
833 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
835 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
838 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
839 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
840 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
841 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
842 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
843 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
844 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
845 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
846 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
847 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
848 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
850 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
852 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
855 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
856 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
857 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
859 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
861 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
863 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
865 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
866 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
868 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
870 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
871 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
873 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
876 unsigned long offset = (unsigned long)c;
877 offset += offsetof(struct btrfs_chunk, stripe);
878 offset += nr * sizeof(struct btrfs_stripe);
879 return (struct btrfs_stripe *)offset;
882 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
884 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
887 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
888 struct btrfs_chunk *c, int nr)
890 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
893 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
894 struct btrfs_chunk *c, int nr,
897 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
900 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
901 struct btrfs_chunk *c, int nr)
903 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
906 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
907 struct btrfs_chunk *c, int nr,
910 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
913 /* struct btrfs_block_group_item */
914 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
916 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
918 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
919 struct btrfs_block_group_item, chunk_objectid, 64);
921 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
922 struct btrfs_block_group_item, chunk_objectid, 64);
923 BTRFS_SETGET_FUNCS(disk_block_group_flags,
924 struct btrfs_block_group_item, flags, 64);
925 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
926 struct btrfs_block_group_item, flags, 64);
928 /* struct btrfs_inode_ref */
929 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
930 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
932 /* struct btrfs_inode_item */
933 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
934 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
935 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
936 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
937 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
938 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
939 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
940 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
941 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
942 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
943 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
946 static inline struct btrfs_timespec *
947 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
949 unsigned long ptr = (unsigned long)inode_item;
950 ptr += offsetof(struct btrfs_inode_item, atime);
951 return (struct btrfs_timespec *)ptr;
954 static inline struct btrfs_timespec *
955 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
957 unsigned long ptr = (unsigned long)inode_item;
958 ptr += offsetof(struct btrfs_inode_item, mtime);
959 return (struct btrfs_timespec *)ptr;
962 static inline struct btrfs_timespec *
963 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
965 unsigned long ptr = (unsigned long)inode_item;
966 ptr += offsetof(struct btrfs_inode_item, ctime);
967 return (struct btrfs_timespec *)ptr;
970 static inline struct btrfs_timespec *
971 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
973 unsigned long ptr = (unsigned long)inode_item;
974 ptr += offsetof(struct btrfs_inode_item, otime);
975 return (struct btrfs_timespec *)ptr;
978 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
979 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
981 /* struct btrfs_extent_item */
982 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
984 /* struct btrfs_dev_extent */
985 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
987 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
989 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
991 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
993 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
995 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
996 return (u8 *)((unsigned long)dev + ptr);
999 /* struct btrfs_extent_ref */
1000 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1001 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1002 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1003 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
1005 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1006 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1008 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1010 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
1012 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1015 /* struct btrfs_node */
1016 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1017 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1019 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1022 ptr = offsetof(struct btrfs_node, ptrs) +
1023 sizeof(struct btrfs_key_ptr) * nr;
1024 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1027 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1031 ptr = offsetof(struct btrfs_node, ptrs) +
1032 sizeof(struct btrfs_key_ptr) * nr;
1033 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1036 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1039 ptr = offsetof(struct btrfs_node, ptrs) +
1040 sizeof(struct btrfs_key_ptr) * nr;
1041 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1044 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1048 ptr = offsetof(struct btrfs_node, ptrs) +
1049 sizeof(struct btrfs_key_ptr) * nr;
1050 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1053 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1055 return offsetof(struct btrfs_node, ptrs) +
1056 sizeof(struct btrfs_key_ptr) * nr;
1059 void btrfs_node_key(struct extent_buffer *eb,
1060 struct btrfs_disk_key *disk_key, int nr);
1062 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1063 struct btrfs_disk_key *disk_key, int nr)
1066 ptr = btrfs_node_key_ptr_offset(nr);
1067 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1068 struct btrfs_key_ptr, key, disk_key);
1071 /* struct btrfs_item */
1072 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1073 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1075 static inline unsigned long btrfs_item_nr_offset(int nr)
1077 return offsetof(struct btrfs_leaf, items) +
1078 sizeof(struct btrfs_item) * nr;
1081 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1084 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1087 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1088 struct btrfs_item *item)
1090 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1093 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1095 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1098 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1100 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1103 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1105 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1108 static inline void btrfs_item_key(struct extent_buffer *eb,
1109 struct btrfs_disk_key *disk_key, int nr)
1111 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1112 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1115 static inline void btrfs_set_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 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1122 /* struct btrfs_dir_item */
1123 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1124 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1125 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1127 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1128 struct btrfs_dir_item *item,
1129 struct btrfs_disk_key *key)
1131 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1134 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1135 struct btrfs_dir_item *item,
1136 struct btrfs_disk_key *key)
1138 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1141 /* struct btrfs_disk_key */
1142 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1144 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1145 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1147 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1148 struct btrfs_disk_key *disk)
1150 cpu->offset = le64_to_cpu(disk->offset);
1151 cpu->type = disk->type;
1152 cpu->objectid = le64_to_cpu(disk->objectid);
1155 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1156 struct btrfs_key *cpu)
1158 disk->offset = cpu_to_le64(cpu->offset);
1159 disk->type = cpu->type;
1160 disk->objectid = cpu_to_le64(cpu->objectid);
1163 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1164 struct btrfs_key *key, int nr)
1166 struct btrfs_disk_key disk_key;
1167 btrfs_node_key(eb, &disk_key, nr);
1168 btrfs_disk_key_to_cpu(key, &disk_key);
1171 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1172 struct btrfs_key *key, int nr)
1174 struct btrfs_disk_key disk_key;
1175 btrfs_item_key(eb, &disk_key, nr);
1176 btrfs_disk_key_to_cpu(key, &disk_key);
1179 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1180 struct btrfs_dir_item *item,
1181 struct btrfs_key *key)
1183 struct btrfs_disk_key disk_key;
1184 btrfs_dir_item_key(eb, item, &disk_key);
1185 btrfs_disk_key_to_cpu(key, &disk_key);
1189 static inline u8 btrfs_key_type(struct btrfs_key *key)
1194 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1199 /* struct btrfs_header */
1200 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1201 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1203 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1204 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1205 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1206 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1208 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1210 return (btrfs_header_flags(eb) & flag) == flag;
1213 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1215 u64 flags = btrfs_header_flags(eb);
1216 btrfs_set_header_flags(eb, flags | flag);
1217 return (flags & flag) == flag;
1220 static inline int btrfs_clear_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 u8 *btrfs_header_fsid(struct extent_buffer *eb)
1229 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1233 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1235 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1239 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1241 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1245 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1247 unsigned long ptr = offsetof(struct btrfs_header, csum);
1251 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1256 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1261 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1266 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1268 return (btrfs_header_level(eb) == 0);
1271 /* struct btrfs_root_item */
1272 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1273 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1274 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1276 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1277 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1278 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1279 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1280 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1281 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1282 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1284 /* struct btrfs_super_block */
1285 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1286 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1287 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1289 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1290 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1291 struct btrfs_super_block, sys_chunk_array_size, 32);
1292 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1294 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1296 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1297 chunk_root_level, 64);
1298 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1300 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1302 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1304 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1306 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1308 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1310 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1311 root_dir_objectid, 64);
1312 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1315 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1317 return offsetof(struct btrfs_leaf, items);
1320 /* struct btrfs_file_extent_item */
1321 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1323 static inline unsigned long btrfs_file_extent_inline_start(struct
1324 btrfs_file_extent_item *e)
1326 unsigned long offset = (unsigned long)e;
1327 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1331 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1333 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1336 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1337 struct btrfs_item *e)
1339 unsigned long offset;
1340 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1341 return btrfs_item_size(eb, e) - offset;
1344 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1346 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1348 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1349 disk_num_bytes, 64);
1350 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1352 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1355 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1357 return sb->s_fs_info;
1360 static inline int btrfs_set_root_name(struct btrfs_root *root,
1361 const char *name, int len)
1363 /* if we already have a name just free it */
1367 root->name = kmalloc(len+1, GFP_KERNEL);
1371 memcpy(root->name, name, len);
1372 root->name[len] ='\0';
1377 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1379 return root->leafsize;
1380 return root->nodesize;
1383 /* helper function to cast into the data area of the leaf. */
1384 #define btrfs_item_ptr(leaf, slot, type) \
1385 ((type *)(btrfs_leaf_data(leaf) + \
1386 btrfs_item_offset_nr(leaf, slot)))
1388 #define btrfs_item_ptr_offset(leaf, slot) \
1389 ((unsigned long)(btrfs_leaf_data(leaf) + \
1390 btrfs_item_offset_nr(leaf, slot)))
1392 static inline struct dentry *fdentry(struct file *file) {
1393 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1394 return file->f_dentry;
1396 return file->f_path.dentry;
1401 u32 btrfs_count_snapshots_in_path(struct btrfs_root *root,
1402 struct btrfs_path *count_path,
1403 u64 expected_owner, u64 first_extent);
1404 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1405 struct btrfs_root *root);
1406 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1407 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1408 btrfs_fs_info *info,
1410 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1411 struct btrfs_block_group_cache
1412 *hint, u64 search_start,
1413 int data, int owner);
1414 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1415 struct btrfs_root *root,
1423 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1424 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1425 struct btrfs_root *root,
1426 struct btrfs_path *path, u64 bytenr,
1427 u64 root_objectid, u64 ref_generation,
1428 u64 owner, u64 owner_offset);
1429 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1430 struct btrfs_root *root,
1431 u64 num_bytes, u64 min_bytes,
1432 u64 root_objectid, u64 ref_generation,
1433 u64 owner, u64 owner_offset,
1434 u64 empty_size, u64 hint_byte,
1435 u64 search_end, struct btrfs_key *ins, u64 data);
1436 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1437 struct btrfs_root *root,
1438 u64 root_objectid, u64 ref_generation,
1439 u64 owner, u64 owner_offset,
1440 struct btrfs_key *ins);
1441 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1442 struct btrfs_root *root,
1443 u64 num_bytes, u64 min_alloc_size,
1444 u64 empty_size, u64 hint_byte,
1445 u64 search_end, struct btrfs_key *ins,
1447 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1448 struct extent_buffer *buf, int cache_ref);
1449 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1450 *root, u64 bytenr, u64 num_bytes,
1451 u64 root_objectid, u64 ref_generation,
1452 u64 owner_objectid, u64 owner_offset, int pin);
1453 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1454 struct btrfs_root *root,
1455 struct extent_io_tree *unpin);
1456 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1457 struct btrfs_root *root,
1458 u64 bytenr, u64 num_bytes,
1459 u64 root_objectid, u64 ref_generation,
1460 u64 owner, u64 owner_offset);
1461 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1462 struct btrfs_root *root);
1463 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1464 int btrfs_read_block_groups(struct btrfs_root *root);
1465 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1466 struct btrfs_root *root, u64 bytes_used,
1467 u64 type, u64 chunk_objectid, u64 chunk_offset,
1470 int btrfs_previous_item(struct btrfs_root *root,
1471 struct btrfs_path *path, u64 min_objectid,
1474 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1475 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1476 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1477 struct btrfs_key *key, int lowest_level,
1478 int cache_only, u64 min_trans);
1479 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1480 struct btrfs_path *path, int cache_only,
1483 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1484 struct btrfs_root *root, struct extent_buffer *buf,
1485 struct extent_buffer *parent, int parent_slot,
1486 struct extent_buffer **cow_ret);
1487 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1488 struct btrfs_root *root,
1489 struct extent_buffer *buf,
1490 struct extent_buffer **cow_ret, u64 new_root_objectid);
1491 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1492 *root, struct btrfs_path *path, u32 data_size);
1493 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1494 struct btrfs_root *root,
1495 struct btrfs_path *path,
1496 u32 new_size, int from_end);
1497 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1498 *root, struct btrfs_key *key, struct btrfs_path *p, int
1500 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1501 struct btrfs_root *root, struct extent_buffer *parent,
1502 int start_slot, int cache_only, u64 *last_ret,
1503 struct btrfs_key *progress);
1504 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1505 struct btrfs_path *btrfs_alloc_path(void);
1506 void btrfs_free_path(struct btrfs_path *p);
1507 void btrfs_init_path(struct btrfs_path *p);
1508 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1509 struct btrfs_path *path, int slot, int nr);
1511 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1512 struct btrfs_root *root,
1513 struct btrfs_path *path)
1515 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1518 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1519 *root, struct btrfs_key *key, void *data, u32 data_size);
1520 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1521 struct btrfs_root *root,
1522 struct btrfs_path *path,
1523 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1525 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1526 struct btrfs_root *root,
1527 struct btrfs_path *path,
1528 struct btrfs_key *key,
1531 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1534 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1535 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1536 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1537 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1540 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1541 struct btrfs_key *key);
1542 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1543 *root, struct btrfs_key *key, struct btrfs_root_item
1545 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1546 *root, struct btrfs_key *key, struct btrfs_root_item
1548 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1549 btrfs_root_item *item, struct btrfs_key *key);
1550 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1551 u64 *found_objectid);
1552 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1553 struct btrfs_root *latest_root);
1555 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1556 *root, const char *name, int name_len, u64 dir,
1557 struct btrfs_key *location, u8 type, u64 index);
1558 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1559 struct btrfs_root *root,
1560 struct btrfs_path *path, u64 dir,
1561 const char *name, int name_len,
1563 struct btrfs_dir_item *
1564 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1565 struct btrfs_root *root,
1566 struct btrfs_path *path, u64 dir,
1567 u64 objectid, const char *name, int name_len,
1569 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1570 struct btrfs_path *path,
1571 const char *name, int name_len);
1572 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1573 struct btrfs_root *root,
1574 struct btrfs_path *path,
1575 struct btrfs_dir_item *di);
1576 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1577 struct btrfs_root *root, const char *name,
1578 u16 name_len, const void *data, u16 data_len,
1580 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1581 struct btrfs_root *root,
1582 struct btrfs_path *path, u64 dir,
1583 const char *name, u16 name_len,
1587 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
1588 struct btrfs_root *root, u64 offset);
1589 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
1590 struct btrfs_root *root, u64 offset);
1593 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1594 struct btrfs_root *fs_root,
1595 u64 dirid, u64 *objectid);
1596 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1599 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1600 struct btrfs_root *root,
1601 const char *name, int name_len,
1602 u64 inode_objectid, u64 ref_objectid, u64 index);
1603 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1604 struct btrfs_root *root,
1605 const char *name, int name_len,
1606 u64 inode_objectid, u64 ref_objectid, u64 *index);
1607 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1608 struct btrfs_root *root,
1609 struct btrfs_path *path, u64 objectid);
1610 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1611 *root, struct btrfs_path *path,
1612 struct btrfs_key *location, int mod);
1615 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1616 struct btrfs_root *root,
1617 u64 objectid, u64 pos, u64 disk_offset,
1619 u64 num_bytes, u64 offset);
1620 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1621 struct btrfs_root *root,
1622 struct btrfs_path *path, u64 objectid,
1623 u64 bytenr, int mod);
1624 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1625 struct btrfs_root *root, struct inode *inode,
1626 struct btrfs_ordered_sum *sums);
1627 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
1629 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1630 struct btrfs_root *root,
1631 struct btrfs_path *path,
1632 u64 objectid, u64 offset,
1634 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1635 struct btrfs_root *root, struct btrfs_path *path,
1639 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1640 #ifdef ClearPageFsMisc
1641 #define ClearPageChecked ClearPageFsMisc
1642 #define SetPageChecked SetPageFsMisc
1643 #define PageChecked PageFsMisc
1646 int btrfs_writepages(struct address_space *mapping,
1647 struct writeback_control *wbc);
1648 int btrfs_create_subvol_root(struct btrfs_root *new_root,
1649 struct btrfs_trans_handle *trans, u64 new_dirid,
1650 struct btrfs_block_group_cache *block_group);
1652 void btrfs_invalidate_dcache_root(struct btrfs_root *root, char *name,
1655 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1656 size_t size, struct bio *bio);
1658 static inline void dec_i_blocks(struct inode *inode, u64 dec)
1661 if (dec <= inode->i_blocks)
1662 inode->i_blocks -= dec;
1664 inode->i_blocks = 0;
1667 unsigned long btrfs_force_ra(struct address_space *mapping,
1668 struct file_ra_state *ra, struct file *file,
1669 pgoff_t offset, pgoff_t last_index);
1670 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1672 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1673 int btrfs_readpage(struct file *file, struct page *page);
1674 void btrfs_delete_inode(struct inode *inode);
1675 void btrfs_put_inode(struct inode *inode);
1676 void btrfs_read_locked_inode(struct inode *inode);
1677 int btrfs_write_inode(struct inode *inode, int wait);
1678 void btrfs_dirty_inode(struct inode *inode);
1679 struct inode *btrfs_alloc_inode(struct super_block *sb);
1680 void btrfs_destroy_inode(struct inode *inode);
1681 int btrfs_init_cachep(void);
1682 void btrfs_destroy_cachep(void);
1683 long btrfs_ioctl_trans_end(struct file *file);
1684 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1685 struct btrfs_root *root);
1686 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1688 int btrfs_commit_write(struct file *file, struct page *page,
1689 unsigned from, unsigned to);
1690 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1691 size_t page_offset, u64 start, u64 end,
1693 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1694 struct btrfs_root *root,
1695 struct inode *inode);
1698 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1701 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
1702 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1703 extern struct file_operations btrfs_file_operations;
1704 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1705 struct btrfs_root *root, struct inode *inode,
1706 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1707 int btrfs_release_file(struct inode *inode, struct file *file);
1710 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1711 struct btrfs_root *root, int cache_only);
1714 int btrfs_init_sysfs(void);
1715 void btrfs_exit_sysfs(void);
1716 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1717 int btrfs_sysfs_add_root(struct btrfs_root *root);
1718 void btrfs_sysfs_del_root(struct btrfs_root *root);
1719 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1722 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1725 u64 btrfs_parse_size(char *str);
1726 int btrfs_parse_options(struct btrfs_root *root, char *options);
1727 int btrfs_sync_fs(struct super_block *sb, int wait);
1730 int btrfs_check_acl(struct inode *inode, int mask);
1731 int btrfs_init_acl(struct inode *inode, struct inode *dir);
1732 int btrfs_acl_chmod(struct inode *inode);