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 "extent_io.h"
31 #include "extent_map.h"
32 #include "async-thread.h"
34 struct btrfs_trans_handle;
35 struct btrfs_transaction;
36 extern struct kmem_cache *btrfs_trans_handle_cachep;
37 extern struct kmem_cache *btrfs_transaction_cachep;
38 extern struct kmem_cache *btrfs_bit_radix_cachep;
39 extern struct kmem_cache *btrfs_path_cachep;
40 struct btrfs_ordered_sum;
42 #define BTRFS_MAGIC "_BHRfS_M"
44 #define BTRFS_ACL_NOT_CACHED ((void *)-1)
47 # define BTRFS_MAX_LEVEL 7
49 # define BTRFS_MAX_LEVEL 8
52 /* holds pointers to all of the tree roots */
53 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
55 /* stores information about which extents are in use, and reference counts */
56 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
59 * chunk tree stores translations from logical -> physical block numbering
60 * the super block points to the chunk tree
62 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
65 * stores information about which areas of a given device are in use.
66 * one per device. The tree of tree roots points to the device tree
68 #define BTRFS_DEV_TREE_OBJECTID 4ULL
70 /* one per subvolume, storing files and directories */
71 #define BTRFS_FS_TREE_OBJECTID 5ULL
73 /* directory objectid inside the root tree */
74 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
76 /* holds checksums of all the data extents */
77 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
79 /* orhpan objectid for tracking unlinked/truncated files */
80 #define BTRFS_ORPHAN_OBJECTID -5ULL
82 /* does write ahead logging to speed up fsyncs */
83 #define BTRFS_TREE_LOG_OBJECTID -6ULL
84 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
86 /* for space balancing */
87 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
88 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
91 * extent checksums all have this objectid
92 * this allows them to share the logging tree
95 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
97 /* dummy objectid represents multiple objectids */
98 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
101 * All files have objectids in this range.
103 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
104 #define BTRFS_LAST_FREE_OBJECTID -256ULL
105 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
109 * the device items go into the chunk tree. The key is in the form
110 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
112 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
115 * we can actually store much bigger names, but lets not confuse the rest
118 #define BTRFS_NAME_LEN 255
120 /* 32 bytes in various csum fields */
121 #define BTRFS_CSUM_SIZE 32
124 #define BTRFS_CSUM_TYPE_CRC32 0
126 static int btrfs_csum_sizes[] = { 4, 0 };
128 /* four bytes for CRC32 */
129 #define BTRFS_EMPTY_DIR_SIZE 0
131 #define BTRFS_FT_UNKNOWN 0
132 #define BTRFS_FT_REG_FILE 1
133 #define BTRFS_FT_DIR 2
134 #define BTRFS_FT_CHRDEV 3
135 #define BTRFS_FT_BLKDEV 4
136 #define BTRFS_FT_FIFO 5
137 #define BTRFS_FT_SOCK 6
138 #define BTRFS_FT_SYMLINK 7
139 #define BTRFS_FT_XATTR 8
140 #define BTRFS_FT_MAX 9
143 * the key defines the order in the tree, and so it also defines (optimal)
144 * block layout. objectid corresonds to the inode number. The flags
145 * tells us things about the object, and is a kind of stream selector.
146 * so for a given inode, keys with flags of 1 might refer to the inode
147 * data, flags of 2 may point to file data in the btree and flags == 3
148 * may point to extents.
150 * offset is the starting byte offset for this key in the stream.
152 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
153 * in cpu native order. Otherwise they are identical and their sizes
154 * should be the same (ie both packed)
156 struct btrfs_disk_key {
160 } __attribute__ ((__packed__));
166 } __attribute__ ((__packed__));
168 struct btrfs_mapping_tree {
169 struct extent_map_tree map_tree;
172 #define BTRFS_UUID_SIZE 16
173 struct btrfs_dev_item {
174 /* the internal btrfs device id */
177 /* size of the device */
183 /* optimal io alignment for this device */
186 /* optimal io width for this device */
189 /* minimal io size for this device */
192 /* type and info about this device */
195 /* expected generation for this device */
199 * starting byte of this partition on the device,
200 * to allowr for stripe alignment in the future
204 /* grouping information for allocation decisions */
207 /* seek speed 0-100 where 100 is fastest */
210 /* bandwidth 0-100 where 100 is fastest */
213 /* btrfs generated uuid for this device */
214 u8 uuid[BTRFS_UUID_SIZE];
216 /* uuid of FS who owns this device */
217 u8 fsid[BTRFS_UUID_SIZE];
218 } __attribute__ ((__packed__));
220 struct btrfs_stripe {
223 u8 dev_uuid[BTRFS_UUID_SIZE];
224 } __attribute__ ((__packed__));
227 /* size of this chunk in bytes */
230 /* objectid of the root referencing this chunk */
236 /* optimal io alignment for this chunk */
239 /* optimal io width for this chunk */
242 /* minimal io size for this chunk */
245 /* 2^16 stripes is quite a lot, a second limit is the size of a single
250 /* sub stripes only matter for raid10 */
252 struct btrfs_stripe stripe;
253 /* additional stripes go here */
254 } __attribute__ ((__packed__));
256 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
258 BUG_ON(num_stripes == 0);
259 return sizeof(struct btrfs_chunk) +
260 sizeof(struct btrfs_stripe) * (num_stripes - 1);
263 #define BTRFS_FSID_SIZE 16
264 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
267 * every tree block (leaf or node) starts with this header.
269 struct btrfs_header {
270 /* these first four must match the super block */
271 u8 csum[BTRFS_CSUM_SIZE];
272 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
273 __le64 bytenr; /* which block this node is supposed to live in */
276 /* allowed to be different from the super from here on down */
277 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
282 } __attribute__ ((__packed__));
284 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
285 sizeof(struct btrfs_header)) / \
286 sizeof(struct btrfs_key_ptr))
287 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
288 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
289 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
290 sizeof(struct btrfs_item) - \
291 sizeof(struct btrfs_file_extent_item))
293 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
296 * this is a very generous portion of the super block, giving us
297 * room to translate 14 chunks with 3 stripes each.
299 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
300 #define BTRFS_LABEL_SIZE 256
303 * the super block basically lists the main trees of the FS
304 * it currently lacks any block count etc etc
306 struct btrfs_super_block {
307 u8 csum[BTRFS_CSUM_SIZE];
308 /* the first 4 fields must match struct btrfs_header */
309 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
310 __le64 bytenr; /* this block number */
313 /* allowed to be different from the btrfs_header from here own down */
320 /* this will help find the new super based on the log root */
321 __le64 log_root_transid;
324 __le64 root_dir_objectid;
330 __le32 sys_chunk_array_size;
331 __le64 chunk_root_generation;
333 __le64 compat_ro_flags;
334 __le64 incompat_flags;
339 struct btrfs_dev_item dev_item;
341 char label[BTRFS_LABEL_SIZE];
343 /* future expansion */
345 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
346 } __attribute__ ((__packed__));
349 * Compat flags that we support. If any incompat flags are set other than the
350 * ones specified below then we will fail to mount
352 #define BTRFS_FEATURE_COMPAT_SUPP 0x0
353 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0x0
354 #define BTRFS_FEATURE_INCOMPAT_SUPP 0x0
357 * A leaf is full of items. offset and size tell us where to find
358 * the item in the leaf (relative to the start of the data area)
361 struct btrfs_disk_key key;
364 } __attribute__ ((__packed__));
367 * leaves have an item area and a data area:
368 * [item0, item1....itemN] [free space] [dataN...data1, data0]
370 * The data is separate from the items to get the keys closer together
374 struct btrfs_header header;
375 struct btrfs_item items[];
376 } __attribute__ ((__packed__));
379 * all non-leaf blocks are nodes, they hold only keys and pointers to
382 struct btrfs_key_ptr {
383 struct btrfs_disk_key key;
386 } __attribute__ ((__packed__));
389 struct btrfs_header header;
390 struct btrfs_key_ptr ptrs[];
391 } __attribute__ ((__packed__));
394 * btrfs_paths remember the path taken from the root down to the leaf.
395 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
396 * to any other levels that are present.
398 * The slots array records the index of the item or block pointer
399 * used while walking the tree.
402 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
403 int slots[BTRFS_MAX_LEVEL];
404 /* if there is real range locking, this locks field will change */
405 int locks[BTRFS_MAX_LEVEL];
407 /* keep some upper locks as we walk down */
413 * set by btrfs_split_item, tells search_slot to keep all locks
414 * and to force calls to keep space in the nodes
416 int search_for_split;
420 * items in the extent btree are used to record the objectid of the
421 * owner of the block and the number of references
423 struct btrfs_extent_item {
425 } __attribute__ ((__packed__));
427 struct btrfs_extent_ref {
432 } __attribute__ ((__packed__));
434 /* dev extents record free space on individual devices. The owner
435 * field points back to the chunk allocation mapping tree that allocated
436 * the extent. The chunk tree uuid field is a way to double check the owner
438 struct btrfs_dev_extent {
440 __le64 chunk_objectid;
443 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
444 } __attribute__ ((__packed__));
446 struct btrfs_inode_ref {
450 } __attribute__ ((__packed__));
452 struct btrfs_timespec {
455 } __attribute__ ((__packed__));
457 enum btrfs_compression_type {
458 BTRFS_COMPRESS_NONE = 0,
459 BTRFS_COMPRESS_ZLIB = 1,
460 BTRFS_COMPRESS_LAST = 2,
463 struct btrfs_inode_item {
464 /* nfs style generation number */
466 /* transid that last touched this inode */
478 /* modification sequence number for NFS */
482 * a little future expansion, for more than this we can
483 * just grow the inode item and version it
486 struct btrfs_timespec atime;
487 struct btrfs_timespec ctime;
488 struct btrfs_timespec mtime;
489 struct btrfs_timespec otime;
490 } __attribute__ ((__packed__));
492 struct btrfs_dir_log_item {
494 } __attribute__ ((__packed__));
496 struct btrfs_dir_item {
497 struct btrfs_disk_key location;
502 } __attribute__ ((__packed__));
504 struct btrfs_root_item {
505 struct btrfs_inode_item inode;
511 __le64 last_snapshot;
514 struct btrfs_disk_key drop_progress;
517 } __attribute__ ((__packed__));
520 * this is used for both forward and backward root refs
522 struct btrfs_root_ref {
526 } __attribute__ ((__packed__));
528 #define BTRFS_FILE_EXTENT_INLINE 0
529 #define BTRFS_FILE_EXTENT_REG 1
530 #define BTRFS_FILE_EXTENT_PREALLOC 2
532 struct btrfs_file_extent_item {
534 * transaction id that created this extent
538 * max number of bytes to hold this extent in ram
539 * when we split a compressed extent we can't know how big
540 * each of the resulting pieces will be. So, this is
541 * an upper limit on the size of the extent in ram instead of
547 * 32 bits for the various ways we might encode the data,
548 * including compression and encryption. If any of these
549 * are set to something a given disk format doesn't understand
550 * it is treated like an incompat flag for reading and writing,
555 __le16 other_encoding; /* spare for later use */
557 /* are we inline data or a real extent? */
561 * disk space consumed by the extent, checksum blocks are included
565 __le64 disk_num_bytes;
567 * the logical offset in file blocks (no csums)
568 * this extent record is for. This allows a file extent to point
569 * into the middle of an existing extent on disk, sharing it
570 * between two snapshots (useful if some bytes in the middle of the
571 * extent have changed
575 * the logical number of file blocks (no csums included). This
576 * always reflects the size uncompressed and without encoding.
580 } __attribute__ ((__packed__));
582 struct btrfs_csum_item {
584 } __attribute__ ((__packed__));
586 /* different types of block groups (and chunks) */
587 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
588 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
589 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
590 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
591 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
592 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
593 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
595 struct btrfs_block_group_item {
597 __le64 chunk_objectid;
599 } __attribute__ ((__packed__));
601 struct btrfs_space_info {
610 struct list_head list;
612 /* for block groups in our same type */
613 struct list_head block_groups;
615 struct rw_semaphore groups_sem;
618 struct btrfs_free_space {
619 struct rb_node bytes_index;
620 struct rb_node offset_index;
625 struct btrfs_block_group_cache {
626 struct btrfs_key key;
627 struct btrfs_block_group_item item;
629 struct mutex alloc_mutex;
630 struct mutex cache_mutex;
638 struct btrfs_space_info *space_info;
640 /* free space cache stuff */
641 struct rb_root free_space_bytes;
642 struct rb_root free_space_offset;
644 /* block group cache stuff */
645 struct rb_node cache_node;
647 /* for block groups in the same raid type */
648 struct list_head list;
654 struct btrfs_leaf_ref_tree {
656 struct list_head list;
661 struct btrfs_fs_devices;
662 struct btrfs_fs_info {
663 u8 fsid[BTRFS_FSID_SIZE];
664 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
665 struct btrfs_root *extent_root;
666 struct btrfs_root *tree_root;
667 struct btrfs_root *chunk_root;
668 struct btrfs_root *dev_root;
669 struct btrfs_root *fs_root;
670 struct btrfs_root *csum_root;
672 /* the log root tree is a directory of all the other log roots */
673 struct btrfs_root *log_root_tree;
674 struct radix_tree_root fs_roots_radix;
676 /* block group cache stuff */
677 spinlock_t block_group_cache_lock;
678 struct rb_root block_group_cache_tree;
680 struct extent_io_tree pinned_extents;
681 struct extent_io_tree pending_del;
682 struct extent_io_tree extent_ins;
684 /* logical->physical extent mapping */
685 struct btrfs_mapping_tree mapping_tree;
688 u64 last_trans_committed;
689 u64 last_trans_new_blockgroup;
690 u64 open_ioctl_trans;
691 unsigned long mount_opt;
695 struct btrfs_transaction *running_transaction;
696 wait_queue_head_t transaction_throttle;
697 wait_queue_head_t transaction_wait;
698 wait_queue_head_t async_submit_wait;
700 struct btrfs_super_block super_copy;
701 struct btrfs_super_block super_for_commit;
702 struct block_device *__bdev;
703 struct super_block *sb;
704 struct inode *btree_inode;
705 struct backing_dev_info bdi;
706 spinlock_t hash_lock;
707 struct mutex trans_mutex;
708 struct mutex tree_log_mutex;
709 struct mutex transaction_kthread_mutex;
710 struct mutex cleaner_mutex;
711 struct mutex extent_ins_mutex;
712 struct mutex pinned_mutex;
713 struct mutex chunk_mutex;
714 struct mutex drop_mutex;
715 struct mutex volume_mutex;
716 struct mutex tree_reloc_mutex;
717 struct list_head trans_list;
718 struct list_head hashers;
719 struct list_head dead_roots;
721 atomic_t nr_async_submits;
722 atomic_t async_submit_draining;
723 atomic_t nr_async_bios;
724 atomic_t async_delalloc_pages;
727 * this is used by the balancing code to wait for all the pending
730 spinlock_t ordered_extent_lock;
731 struct list_head ordered_extents;
732 struct list_head delalloc_inodes;
735 * there is a pool of worker threads for checksumming during writes
736 * and a pool for checksumming after reads. This is because readers
737 * can run with FS locks held, and the writers may be waiting for
738 * those locks. We don't want ordering in the pending list to cause
739 * deadlocks, and so the two are serviced separately.
741 * A third pool does submit_bio to avoid deadlocking with the other
744 struct btrfs_workers workers;
745 struct btrfs_workers delalloc_workers;
746 struct btrfs_workers endio_workers;
747 struct btrfs_workers endio_meta_workers;
748 struct btrfs_workers endio_meta_write_workers;
749 struct btrfs_workers endio_write_workers;
750 struct btrfs_workers submit_workers;
752 * fixup workers take dirty pages that didn't properly go through
753 * the cow mechanism and make them safe to write. It happens
754 * for the sys_munmap function call path
756 struct btrfs_workers fixup_workers;
757 struct task_struct *transaction_kthread;
758 struct task_struct *cleaner_kthread;
759 int thread_pool_size;
761 /* tree relocation relocated fields */
762 struct list_head dead_reloc_roots;
763 struct btrfs_leaf_ref_tree reloc_ref_tree;
764 struct btrfs_leaf_ref_tree shared_ref_tree;
766 struct kobject super_kobj;
767 struct completion kobj_unregister;
770 int log_root_recovering;
772 atomic_t throttle_gen;
775 struct list_head dirty_cowonly_roots;
777 struct btrfs_fs_devices *fs_devices;
778 struct list_head space_info;
779 spinlock_t delalloc_lock;
780 spinlock_t new_trans_lock;
785 spinlock_t ref_cache_lock;
786 u64 total_ref_cache_size;
788 u64 avail_data_alloc_bits;
789 u64 avail_metadata_alloc_bits;
790 u64 avail_system_alloc_bits;
791 u64 data_alloc_profile;
792 u64 metadata_alloc_profile;
793 u64 system_alloc_profile;
799 * in ram representation of the tree. extent_root is used for all allocations
800 * and for the extent tree extent_root root.
802 struct btrfs_dirty_root;
804 struct extent_buffer *node;
806 /* the node lock is held while changing the node pointer */
807 spinlock_t node_lock;
809 struct extent_buffer *commit_root;
810 struct btrfs_leaf_ref_tree *ref_tree;
811 struct btrfs_leaf_ref_tree ref_tree_struct;
812 struct btrfs_dirty_root *dirty_root;
813 struct btrfs_root *log_root;
814 struct btrfs_root *reloc_root;
816 struct btrfs_root_item root_item;
817 struct btrfs_key root_key;
818 struct btrfs_fs_info *fs_info;
819 struct extent_io_tree dirty_log_pages;
821 struct kobject root_kobj;
822 struct completion kobj_unregister;
823 struct mutex objectid_mutex;
825 struct mutex log_mutex;
826 wait_queue_head_t log_writer_wait;
827 wait_queue_head_t log_commit_wait[2];
828 atomic_t log_writers;
829 atomic_t log_commit[2];
830 unsigned long log_transid;
831 unsigned long log_batch;
836 /* data allocations are done in sectorsize units */
839 /* node allocations are done in nodesize units */
842 /* leaf allocations are done in leafsize units */
849 u64 last_inode_alloc;
852 u64 defrag_trans_start;
853 struct btrfs_key defrag_progress;
854 struct btrfs_key defrag_max;
860 /* the dirty list is only used by non-reference counted roots */
861 struct list_head dirty_list;
863 spinlock_t list_lock;
864 struct list_head dead_list;
865 struct list_head orphan_list;
868 * right now this just gets used so that a root has its own devid
869 * for stat. It may be used for more later
871 struct super_block anon_super;
876 * inode items have the data typically returned from stat and store other
877 * info about object characteristics. There is one for every file and dir in
880 #define BTRFS_INODE_ITEM_KEY 1
881 #define BTRFS_INODE_REF_KEY 12
882 #define BTRFS_XATTR_ITEM_KEY 24
883 #define BTRFS_ORPHAN_ITEM_KEY 48
884 /* reserve 2-15 close to the inode for later flexibility */
887 * dir items are the name -> inode pointers in a directory. There is one
888 * for every name in a directory.
890 #define BTRFS_DIR_LOG_ITEM_KEY 60
891 #define BTRFS_DIR_LOG_INDEX_KEY 72
892 #define BTRFS_DIR_ITEM_KEY 84
893 #define BTRFS_DIR_INDEX_KEY 96
895 * extent data is for file data
897 #define BTRFS_EXTENT_DATA_KEY 108
900 * extent csums are stored in a separate tree and hold csums for
901 * an entire extent on disk.
903 #define BTRFS_EXTENT_CSUM_KEY 128
906 * root items point to tree roots. There are typically in the root
907 * tree used by the super block to find all the other trees
909 #define BTRFS_ROOT_ITEM_KEY 132
912 * root backrefs tie subvols and snapshots to the directory entries that
915 #define BTRFS_ROOT_BACKREF_KEY 144
918 * root refs make a fast index for listing all of the snapshots and
919 * subvolumes referenced by a given root. They point directly to the
920 * directory item in the root that references the subvol
922 #define BTRFS_ROOT_REF_KEY 156
925 * extent items are in the extent map tree. These record which blocks
926 * are used, and how many references there are to each block
928 #define BTRFS_EXTENT_ITEM_KEY 168
929 #define BTRFS_EXTENT_REF_KEY 180
932 * block groups give us hints into the extent allocation trees. Which
933 * blocks are free etc etc
935 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
937 #define BTRFS_DEV_EXTENT_KEY 204
938 #define BTRFS_DEV_ITEM_KEY 216
939 #define BTRFS_CHUNK_ITEM_KEY 228
942 * string items are for debugging. They just store a short string of
945 #define BTRFS_STRING_ITEM_KEY 253
947 #define BTRFS_MOUNT_NODATASUM (1 << 0)
948 #define BTRFS_MOUNT_NODATACOW (1 << 1)
949 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
950 #define BTRFS_MOUNT_SSD (1 << 3)
951 #define BTRFS_MOUNT_DEGRADED (1 << 4)
952 #define BTRFS_MOUNT_COMPRESS (1 << 5)
954 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
955 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
956 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
961 #define BTRFS_INODE_NODATASUM (1 << 0)
962 #define BTRFS_INODE_NODATACOW (1 << 1)
963 #define BTRFS_INODE_READONLY (1 << 2)
964 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
965 #define BTRFS_INODE_PREALLOC (1 << 4)
966 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
968 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
970 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
972 /* some macros to generate set/get funcs for the struct fields. This
973 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
976 #define le8_to_cpu(v) (v)
977 #define cpu_to_le8(v) (v)
980 #define read_eb_member(eb, ptr, type, member, result) ( \
981 read_extent_buffer(eb, (char *)(result), \
982 ((unsigned long)(ptr)) + \
983 offsetof(type, member), \
984 sizeof(((type *)0)->member)))
986 #define write_eb_member(eb, ptr, type, member, result) ( \
987 write_extent_buffer(eb, (char *)(result), \
988 ((unsigned long)(ptr)) + \
989 offsetof(type, member), \
990 sizeof(((type *)0)->member)))
992 #ifndef BTRFS_SETGET_FUNCS
993 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
994 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
995 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
998 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
999 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1001 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1002 u##bits res = le##bits##_to_cpu(p->member); \
1003 kunmap_atomic(p, KM_USER0); \
1006 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1009 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1010 p->member = cpu_to_le##bits(val); \
1011 kunmap_atomic(p, KM_USER0); \
1014 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1015 static inline u##bits btrfs_##name(type *s) \
1017 return le##bits##_to_cpu(s->member); \
1019 static inline void btrfs_set_##name(type *s, u##bits val) \
1021 s->member = cpu_to_le##bits(val); \
1024 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1025 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1026 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1027 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1028 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1029 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1031 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1032 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1033 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1034 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1035 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1036 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1038 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1039 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1041 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1043 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1045 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1047 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1049 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1050 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1052 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1054 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1056 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1059 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1061 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1064 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1066 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1069 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1070 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1071 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1072 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1073 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1074 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1075 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1076 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1077 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1078 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1079 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1081 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1083 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1086 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1087 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1088 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1090 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1092 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1094 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1096 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1097 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1099 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1101 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1102 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1104 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1107 unsigned long offset = (unsigned long)c;
1108 offset += offsetof(struct btrfs_chunk, stripe);
1109 offset += nr * sizeof(struct btrfs_stripe);
1110 return (struct btrfs_stripe *)offset;
1113 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1115 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1118 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1119 struct btrfs_chunk *c, int nr)
1121 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1124 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1125 struct btrfs_chunk *c, int nr,
1128 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1131 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1132 struct btrfs_chunk *c, int nr)
1134 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1137 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1138 struct btrfs_chunk *c, int nr,
1141 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1144 /* struct btrfs_block_group_item */
1145 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1147 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1149 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1150 struct btrfs_block_group_item, chunk_objectid, 64);
1152 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1153 struct btrfs_block_group_item, chunk_objectid, 64);
1154 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1155 struct btrfs_block_group_item, flags, 64);
1156 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1157 struct btrfs_block_group_item, flags, 64);
1159 /* struct btrfs_inode_ref */
1160 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1161 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1163 /* struct btrfs_inode_item */
1164 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1165 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1166 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1167 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1168 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1169 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1170 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1171 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1172 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1173 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1174 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1175 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1177 static inline struct btrfs_timespec *
1178 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1180 unsigned long ptr = (unsigned long)inode_item;
1181 ptr += offsetof(struct btrfs_inode_item, atime);
1182 return (struct btrfs_timespec *)ptr;
1185 static inline struct btrfs_timespec *
1186 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1188 unsigned long ptr = (unsigned long)inode_item;
1189 ptr += offsetof(struct btrfs_inode_item, mtime);
1190 return (struct btrfs_timespec *)ptr;
1193 static inline struct btrfs_timespec *
1194 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1196 unsigned long ptr = (unsigned long)inode_item;
1197 ptr += offsetof(struct btrfs_inode_item, ctime);
1198 return (struct btrfs_timespec *)ptr;
1201 static inline struct btrfs_timespec *
1202 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1204 unsigned long ptr = (unsigned long)inode_item;
1205 ptr += offsetof(struct btrfs_inode_item, otime);
1206 return (struct btrfs_timespec *)ptr;
1209 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1210 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1212 /* struct btrfs_dev_extent */
1213 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1215 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1216 chunk_objectid, 64);
1217 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1219 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1221 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1223 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1224 return (u8 *)((unsigned long)dev + ptr);
1227 /* struct btrfs_extent_ref */
1228 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1229 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1230 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1231 BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
1233 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1234 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1236 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1238 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
1241 /* struct btrfs_extent_item */
1242 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1243 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1246 /* struct btrfs_node */
1247 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1248 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1250 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1253 ptr = offsetof(struct btrfs_node, ptrs) +
1254 sizeof(struct btrfs_key_ptr) * nr;
1255 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1258 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1262 ptr = offsetof(struct btrfs_node, ptrs) +
1263 sizeof(struct btrfs_key_ptr) * nr;
1264 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1267 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1270 ptr = offsetof(struct btrfs_node, ptrs) +
1271 sizeof(struct btrfs_key_ptr) * nr;
1272 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1275 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1279 ptr = offsetof(struct btrfs_node, ptrs) +
1280 sizeof(struct btrfs_key_ptr) * nr;
1281 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1284 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1286 return offsetof(struct btrfs_node, ptrs) +
1287 sizeof(struct btrfs_key_ptr) * nr;
1290 void btrfs_node_key(struct extent_buffer *eb,
1291 struct btrfs_disk_key *disk_key, int nr);
1293 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1294 struct btrfs_disk_key *disk_key, int nr)
1297 ptr = btrfs_node_key_ptr_offset(nr);
1298 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1299 struct btrfs_key_ptr, key, disk_key);
1302 /* struct btrfs_item */
1303 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1304 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1306 static inline unsigned long btrfs_item_nr_offset(int nr)
1308 return offsetof(struct btrfs_leaf, items) +
1309 sizeof(struct btrfs_item) * nr;
1312 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1315 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1318 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1319 struct btrfs_item *item)
1321 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1324 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1326 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1329 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1331 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1334 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1336 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1339 static inline void btrfs_item_key(struct extent_buffer *eb,
1340 struct btrfs_disk_key *disk_key, int nr)
1342 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1343 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1346 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1347 struct btrfs_disk_key *disk_key, int nr)
1349 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1350 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1353 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1356 * struct btrfs_root_ref
1358 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1359 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1360 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1362 /* struct btrfs_dir_item */
1363 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1364 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1365 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1366 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1368 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1369 struct btrfs_dir_item *item,
1370 struct btrfs_disk_key *key)
1372 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1375 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1376 struct btrfs_dir_item *item,
1377 struct btrfs_disk_key *key)
1379 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1382 /* struct btrfs_disk_key */
1383 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1385 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1386 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1388 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1389 struct btrfs_disk_key *disk)
1391 cpu->offset = le64_to_cpu(disk->offset);
1392 cpu->type = disk->type;
1393 cpu->objectid = le64_to_cpu(disk->objectid);
1396 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1397 struct btrfs_key *cpu)
1399 disk->offset = cpu_to_le64(cpu->offset);
1400 disk->type = cpu->type;
1401 disk->objectid = cpu_to_le64(cpu->objectid);
1404 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1405 struct btrfs_key *key, int nr)
1407 struct btrfs_disk_key disk_key;
1408 btrfs_node_key(eb, &disk_key, nr);
1409 btrfs_disk_key_to_cpu(key, &disk_key);
1412 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1413 struct btrfs_key *key, int nr)
1415 struct btrfs_disk_key disk_key;
1416 btrfs_item_key(eb, &disk_key, nr);
1417 btrfs_disk_key_to_cpu(key, &disk_key);
1420 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1421 struct btrfs_dir_item *item,
1422 struct btrfs_key *key)
1424 struct btrfs_disk_key disk_key;
1425 btrfs_dir_item_key(eb, item, &disk_key);
1426 btrfs_disk_key_to_cpu(key, &disk_key);
1430 static inline u8 btrfs_key_type(struct btrfs_key *key)
1435 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1440 /* struct btrfs_header */
1441 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1442 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1444 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1445 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1446 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1447 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1449 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1451 return (btrfs_header_flags(eb) & flag) == flag;
1454 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1456 u64 flags = btrfs_header_flags(eb);
1457 btrfs_set_header_flags(eb, flags | flag);
1458 return (flags & flag) == flag;
1461 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1463 u64 flags = btrfs_header_flags(eb);
1464 btrfs_set_header_flags(eb, flags & ~flag);
1465 return (flags & flag) == flag;
1468 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1470 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1474 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1476 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1480 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1482 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1486 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1488 unsigned long ptr = offsetof(struct btrfs_header, csum);
1492 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1497 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1502 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1507 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1509 return btrfs_header_level(eb) == 0;
1512 /* struct btrfs_root_item */
1513 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1515 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1516 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1517 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1519 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1521 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1522 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1523 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1524 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1525 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1526 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1527 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1528 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1531 /* struct btrfs_super_block */
1533 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1534 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1535 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1537 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1538 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1539 struct btrfs_super_block, sys_chunk_array_size, 32);
1540 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1541 struct btrfs_super_block, chunk_root_generation, 64);
1542 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1544 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1546 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1547 chunk_root_level, 8);
1548 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1550 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1551 log_root_transid, 64);
1552 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1554 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1556 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1558 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1560 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1562 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1564 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1566 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1567 root_dir_objectid, 64);
1568 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1570 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1572 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1574 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1575 incompat_flags, 64);
1576 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1579 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1581 int t = btrfs_super_csum_type(s);
1582 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1583 return btrfs_csum_sizes[t];
1586 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1588 return offsetof(struct btrfs_leaf, items);
1591 /* struct btrfs_file_extent_item */
1592 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1594 static inline unsigned long
1595 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
1597 unsigned long offset = (unsigned long)e;
1598 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1602 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1604 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1607 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1609 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1611 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1612 disk_num_bytes, 64);
1613 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1615 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1617 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1619 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1621 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1623 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1624 other_encoding, 16);
1626 /* this returns the number of file bytes represented by the inline item.
1627 * If an item is compressed, this is the uncompressed size
1629 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1630 struct btrfs_file_extent_item *e)
1632 return btrfs_file_extent_ram_bytes(eb, e);
1636 * this returns the number of bytes used by the item on disk, minus the
1637 * size of any extent headers. If a file is compressed on disk, this is
1638 * the compressed size
1640 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1641 struct btrfs_item *e)
1643 unsigned long offset;
1644 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1645 return btrfs_item_size(eb, e) - offset;
1648 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1650 return sb->s_fs_info;
1653 static inline int btrfs_set_root_name(struct btrfs_root *root,
1654 const char *name, int len)
1656 /* if we already have a name just free it */
1659 root->name = kmalloc(len+1, GFP_KERNEL);
1663 memcpy(root->name, name, len);
1664 root->name[len] = '\0';
1669 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
1672 return root->leafsize;
1673 return root->nodesize;
1676 /* helper function to cast into the data area of the leaf. */
1677 #define btrfs_item_ptr(leaf, slot, type) \
1678 ((type *)(btrfs_leaf_data(leaf) + \
1679 btrfs_item_offset_nr(leaf, slot)))
1681 #define btrfs_item_ptr_offset(leaf, slot) \
1682 ((unsigned long)(btrfs_leaf_data(leaf) + \
1683 btrfs_item_offset_nr(leaf, slot)))
1685 static inline struct dentry *fdentry(struct file *file)
1687 return file->f_path.dentry;
1691 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
1692 int btrfs_lookup_extent_ref(struct btrfs_trans_handle *trans,
1693 struct btrfs_root *root, u64 bytenr,
1694 u64 num_bytes, u32 *refs);
1695 int btrfs_update_pinned_extents(struct btrfs_root *root,
1696 u64 bytenr, u64 num, int pin);
1697 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1698 struct btrfs_root *root, struct extent_buffer *leaf);
1699 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
1700 struct btrfs_root *root, u64 objectid, u64 bytenr);
1701 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1702 struct btrfs_root *root);
1703 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1704 struct btrfs_block_group_cache *btrfs_lookup_block_group(
1705 struct btrfs_fs_info *info,
1707 u64 btrfs_find_block_group(struct btrfs_root *root,
1708 u64 search_start, u64 search_hint, int owner);
1709 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1710 struct btrfs_root *root,
1711 u32 blocksize, u64 parent,
1717 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1718 struct btrfs_root *root,
1719 u64 bytenr, u32 blocksize);
1720 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1721 struct btrfs_root *root,
1722 u64 num_bytes, u64 parent, u64 min_bytes,
1723 u64 root_objectid, u64 ref_generation,
1724 u64 owner, u64 empty_size, u64 hint_byte,
1725 u64 search_end, struct btrfs_key *ins, u64 data);
1726 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1727 struct btrfs_root *root, u64 parent,
1728 u64 root_objectid, u64 ref_generation,
1729 u64 owner, struct btrfs_key *ins);
1730 int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
1731 struct btrfs_root *root, u64 parent,
1732 u64 root_objectid, u64 ref_generation,
1733 u64 owner, struct btrfs_key *ins);
1734 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1735 struct btrfs_root *root,
1736 u64 num_bytes, u64 min_alloc_size,
1737 u64 empty_size, u64 hint_byte,
1738 u64 search_end, struct btrfs_key *ins,
1740 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1741 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1743 int btrfs_cache_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1744 struct extent_buffer *buf, u32 nr_extents);
1745 int btrfs_update_ref(struct btrfs_trans_handle *trans,
1746 struct btrfs_root *root, struct extent_buffer *orig_buf,
1747 struct extent_buffer *buf, int start_slot, int nr);
1748 int btrfs_free_extent(struct btrfs_trans_handle *trans,
1749 struct btrfs_root *root,
1750 u64 bytenr, u64 num_bytes, u64 parent,
1751 u64 root_objectid, u64 ref_generation,
1752 u64 owner_objectid, int pin);
1753 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
1754 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1755 struct btrfs_root *root,
1756 struct extent_io_tree *unpin);
1757 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1758 struct btrfs_root *root,
1759 u64 bytenr, u64 num_bytes, u64 parent,
1760 u64 root_objectid, u64 ref_generation,
1761 u64 owner_objectid);
1762 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1763 struct btrfs_root *root, u64 bytenr,
1764 u64 orig_parent, u64 parent,
1765 u64 root_objectid, u64 ref_generation,
1766 u64 owner_objectid);
1767 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1768 struct btrfs_root *root);
1769 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
1770 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1771 int btrfs_read_block_groups(struct btrfs_root *root);
1772 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1773 struct btrfs_root *root, u64 bytes_used,
1774 u64 type, u64 chunk_objectid, u64 chunk_offset,
1776 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
1777 struct btrfs_root *root, u64 group_start);
1778 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
1779 int btrfs_free_reloc_root(struct btrfs_trans_handle *trans,
1780 struct btrfs_root *root);
1781 int btrfs_drop_dead_reloc_roots(struct btrfs_root *root);
1782 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle *trans,
1783 struct btrfs_root *root,
1784 struct extent_buffer *buf, u64 orig_start);
1785 int btrfs_add_dead_reloc_root(struct btrfs_root *root);
1786 int btrfs_cleanup_reloc_trees(struct btrfs_root *root);
1787 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
1788 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
1790 int btrfs_previous_item(struct btrfs_root *root,
1791 struct btrfs_path *path, u64 min_objectid,
1793 int btrfs_merge_path(struct btrfs_trans_handle *trans,
1794 struct btrfs_root *root,
1795 struct btrfs_key *node_keys,
1796 u64 *nodes, int lowest_level);
1797 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1798 struct btrfs_root *root, struct btrfs_path *path,
1799 struct btrfs_key *new_key);
1800 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1801 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1802 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1803 struct btrfs_key *key, int lowest_level,
1804 int cache_only, u64 min_trans);
1805 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1806 struct btrfs_key *max_key,
1807 struct btrfs_path *path, int cache_only,
1809 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1810 struct btrfs_root *root, struct extent_buffer *buf,
1811 struct extent_buffer *parent, int parent_slot,
1812 struct extent_buffer **cow_ret, u64 prealloc_dest);
1813 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1814 struct btrfs_root *root,
1815 struct extent_buffer *buf,
1816 struct extent_buffer **cow_ret, u64 new_root_objectid);
1817 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1818 *root, struct btrfs_path *path, u32 data_size);
1819 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1820 struct btrfs_root *root,
1821 struct btrfs_path *path,
1822 u32 new_size, int from_end);
1823 int btrfs_split_item(struct btrfs_trans_handle *trans,
1824 struct btrfs_root *root,
1825 struct btrfs_path *path,
1826 struct btrfs_key *new_key,
1827 unsigned long split_offset);
1828 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1829 *root, struct btrfs_key *key, struct btrfs_path *p, int
1831 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1832 struct btrfs_root *root, struct extent_buffer *parent,
1833 int start_slot, int cache_only, u64 *last_ret,
1834 struct btrfs_key *progress);
1835 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1836 struct btrfs_path *btrfs_alloc_path(void);
1837 void btrfs_free_path(struct btrfs_path *p);
1838 void btrfs_init_path(struct btrfs_path *p);
1839 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1840 struct btrfs_path *path, int slot, int nr);
1841 int btrfs_del_leaf(struct btrfs_trans_handle *trans,
1842 struct btrfs_root *root,
1843 struct btrfs_path *path, u64 bytenr);
1844 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1845 struct btrfs_root *root,
1846 struct btrfs_path *path)
1848 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1851 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1852 *root, struct btrfs_key *key, void *data, u32 data_size);
1853 int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
1854 struct btrfs_root *root,
1855 struct btrfs_path *path,
1856 struct btrfs_key *cpu_key, u32 *data_size,
1858 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1859 struct btrfs_root *root,
1860 struct btrfs_path *path,
1861 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1863 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1864 struct btrfs_root *root,
1865 struct btrfs_path *path,
1866 struct btrfs_key *key,
1869 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1872 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1873 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1874 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1875 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1877 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
1878 struct btrfs_root *root,
1879 struct extent_buffer *node,
1880 struct extent_buffer *parent);
1882 int btrfs_find_root_ref(struct btrfs_root *tree_root,
1883 struct btrfs_path *path,
1884 u64 root_id, u64 ref_id);
1885 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
1886 struct btrfs_root *tree_root,
1887 u64 root_id, u8 type, u64 ref_id,
1888 u64 dirid, u64 sequence,
1889 const char *name, int name_len);
1890 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1891 struct btrfs_key *key);
1892 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1893 *root, struct btrfs_key *key, struct btrfs_root_item
1895 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1896 *root, struct btrfs_key *key, struct btrfs_root_item
1898 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1899 btrfs_root_item *item, struct btrfs_key *key);
1900 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1901 u64 *found_objectid);
1902 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1903 struct btrfs_root *latest_root);
1905 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
1906 struct btrfs_root *root, const char *name,
1907 int name_len, u64 dir,
1908 struct btrfs_key *location, u8 type, u64 index);
1909 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1910 struct btrfs_root *root,
1911 struct btrfs_path *path, u64 dir,
1912 const char *name, int name_len,
1914 struct btrfs_dir_item *
1915 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1916 struct btrfs_root *root,
1917 struct btrfs_path *path, u64 dir,
1918 u64 objectid, const char *name, int name_len,
1920 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1921 struct btrfs_path *path,
1922 const char *name, int name_len);
1923 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1924 struct btrfs_root *root,
1925 struct btrfs_path *path,
1926 struct btrfs_dir_item *di);
1927 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1928 struct btrfs_root *root, const char *name,
1929 u16 name_len, const void *data, u16 data_len,
1931 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1932 struct btrfs_root *root,
1933 struct btrfs_path *path, u64 dir,
1934 const char *name, u16 name_len,
1938 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
1939 struct btrfs_root *root, u64 offset);
1940 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
1941 struct btrfs_root *root, u64 offset);
1944 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1945 struct btrfs_root *fs_root,
1946 u64 dirid, u64 *objectid);
1947 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1950 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1951 struct btrfs_root *root,
1952 const char *name, int name_len,
1953 u64 inode_objectid, u64 ref_objectid, u64 index);
1954 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1955 struct btrfs_root *root,
1956 const char *name, int name_len,
1957 u64 inode_objectid, u64 ref_objectid, u64 *index);
1958 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1959 struct btrfs_root *root,
1960 struct btrfs_path *path, u64 objectid);
1961 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1962 *root, struct btrfs_path *path,
1963 struct btrfs_key *location, int mod);
1966 int btrfs_del_csums(struct btrfs_trans_handle *trans,
1967 struct btrfs_root *root, u64 bytenr, u64 len);
1968 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
1969 struct bio *bio, u32 *dst);
1970 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1971 struct btrfs_root *root,
1972 u64 objectid, u64 pos,
1973 u64 disk_offset, u64 disk_num_bytes,
1974 u64 num_bytes, u64 offset, u64 ram_bytes,
1975 u8 compression, u8 encryption, u16 other_encoding);
1976 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1977 struct btrfs_root *root,
1978 struct btrfs_path *path, u64 objectid,
1979 u64 bytenr, int mod);
1980 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1981 struct btrfs_root *root,
1982 struct btrfs_ordered_sum *sums);
1983 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
1984 struct bio *bio, u64 file_start, int contig);
1985 int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
1986 u64 start, unsigned long len);
1987 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1988 struct btrfs_root *root,
1989 struct btrfs_path *path,
1990 u64 bytenr, int cow);
1991 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1992 struct btrfs_root *root, struct btrfs_path *path,
1994 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start,
1995 u64 end, struct list_head *list);
1998 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1999 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2000 #define ClearPageChecked ClearPageFsMisc
2001 #define SetPageChecked SetPageFsMisc
2002 #define PageChecked PageFsMisc
2005 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2006 int btrfs_set_inode_index(struct inode *dir, u64 *index);
2007 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2008 struct btrfs_root *root,
2009 struct inode *dir, struct inode *inode,
2010 const char *name, int name_len);
2011 int btrfs_add_link(struct btrfs_trans_handle *trans,
2012 struct inode *parent_inode, struct inode *inode,
2013 const char *name, int name_len, int add_backref, u64 index);
2014 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2015 struct btrfs_root *root,
2016 struct inode *inode, u64 new_size,
2019 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
2020 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
2021 int btrfs_writepages(struct address_space *mapping,
2022 struct writeback_control *wbc);
2023 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2024 struct btrfs_root *new_root, struct dentry *dentry,
2025 u64 new_dirid, u64 alloc_hint);
2026 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
2027 size_t size, struct bio *bio, unsigned long bio_flags);
2029 unsigned long btrfs_force_ra(struct address_space *mapping,
2030 struct file_ra_state *ra, struct file *file,
2031 pgoff_t offset, pgoff_t last_index);
2032 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
2034 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
2035 int btrfs_readpage(struct file *file, struct page *page);
2036 void btrfs_delete_inode(struct inode *inode);
2037 void btrfs_put_inode(struct inode *inode);
2038 void btrfs_read_locked_inode(struct inode *inode);
2039 int btrfs_write_inode(struct inode *inode, int wait);
2040 void btrfs_dirty_inode(struct inode *inode);
2041 struct inode *btrfs_alloc_inode(struct super_block *sb);
2042 void btrfs_destroy_inode(struct inode *inode);
2043 int btrfs_init_cachep(void);
2044 void btrfs_destroy_cachep(void);
2045 long btrfs_ioctl_trans_end(struct file *file);
2046 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
2047 struct btrfs_root *root, int wait);
2048 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
2049 struct btrfs_root *root);
2050 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2051 struct btrfs_root *root, int *is_new);
2052 int btrfs_commit_write(struct file *file, struct page *page,
2053 unsigned from, unsigned to);
2054 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2055 size_t page_offset, u64 start, u64 end,
2057 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2058 struct btrfs_root *root,
2059 struct inode *inode);
2060 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2061 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2062 void btrfs_orphan_cleanup(struct btrfs_root *root);
2063 int btrfs_cont_expand(struct inode *inode, loff_t size);
2066 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2069 int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
2070 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2072 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
2073 extern struct file_operations btrfs_file_operations;
2074 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
2075 struct btrfs_root *root, struct inode *inode,
2076 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
2077 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2078 struct btrfs_root *root,
2079 struct inode *inode, u64 start, u64 end);
2080 int btrfs_release_file(struct inode *inode, struct file *file);
2083 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2084 struct btrfs_root *root, int cache_only);
2087 int btrfs_init_sysfs(void);
2088 void btrfs_exit_sysfs(void);
2089 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
2090 int btrfs_sysfs_add_root(struct btrfs_root *root);
2091 void btrfs_sysfs_del_root(struct btrfs_root *root);
2092 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
2095 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
2098 u64 btrfs_parse_size(char *str);
2099 int btrfs_parse_options(struct btrfs_root *root, char *options);
2100 int btrfs_sync_fs(struct super_block *sb, int wait);
2103 int btrfs_check_acl(struct inode *inode, int mask);
2104 int btrfs_init_acl(struct inode *inode, struct inode *dir);
2105 int btrfs_acl_chmod(struct inode *inode);
2107 /* free-space-cache.c */
2108 int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
2109 u64 bytenr, u64 size);
2110 int btrfs_add_free_space_lock(struct btrfs_block_group_cache *block_group,
2111 u64 offset, u64 bytes);
2112 int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
2113 u64 bytenr, u64 size);
2114 int btrfs_remove_free_space_lock(struct btrfs_block_group_cache *block_group,
2115 u64 offset, u64 bytes);
2116 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
2118 struct btrfs_free_space *btrfs_find_free_space(struct btrfs_block_group_cache
2119 *block_group, u64 offset,
2121 void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
2123 u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group);